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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 Spreadtrum Communications Inc.
#include <linux/gpio/consumer.h>
#include <linux/iio/consumer.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/math64.h>
#include <linux/module.h>
#include <linux/nvmem-consumer.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/slab.h>
/* PMIC global control registers definition */
#define SC27XX_MODULE_EN0 0xc08
#define SC27XX_CLK_EN0 0xc18
#define SC27XX_FGU_EN BIT(7)
#define SC27XX_FGU_RTC_EN BIT(6)
/* FGU registers definition */
#define SC27XX_FGU_START 0x0
#define SC27XX_FGU_CONFIG 0x4
#define SC27XX_FGU_ADC_CONFIG 0x8
#define SC27XX_FGU_STATUS 0xc
#define SC27XX_FGU_INT_EN 0x10
#define SC27XX_FGU_INT_CLR 0x14
#define SC27XX_FGU_INT_STS 0x1c
#define SC27XX_FGU_VOLTAGE 0x20
#define SC27XX_FGU_OCV 0x24
#define SC27XX_FGU_POCV 0x28
#define SC27XX_FGU_CURRENT 0x2c
#define SC27XX_FGU_LOW_OVERLOAD 0x34
#define SC27XX_FGU_CLBCNT_SETH 0x50
#define SC27XX_FGU_CLBCNT_SETL 0x54
#define SC27XX_FGU_CLBCNT_DELTH 0x58
#define SC27XX_FGU_CLBCNT_DELTL 0x5c
#define SC27XX_FGU_CLBCNT_VALH 0x68
#define SC27XX_FGU_CLBCNT_VALL 0x6c
#define SC27XX_FGU_CLBCNT_QMAXL 0x74
#define SC27XX_FGU_USER_AREA_SET 0xa0
#define SC27XX_FGU_USER_AREA_CLEAR 0xa4
#define SC27XX_FGU_USER_AREA_STATUS 0xa8
#define SC27XX_FGU_VOLTAGE_BUF 0xd0
#define SC27XX_FGU_CURRENT_BUF 0xf0
#define SC27XX_WRITE_SELCLB_EN BIT(0)
#define SC27XX_FGU_CLBCNT_MASK GENMASK(15, 0)
#define SC27XX_FGU_CLBCNT_SHIFT 16
#define SC27XX_FGU_LOW_OVERLOAD_MASK GENMASK(12, 0)
#define SC27XX_FGU_INT_MASK GENMASK(9, 0)
#define SC27XX_FGU_LOW_OVERLOAD_INT BIT(0)
#define SC27XX_FGU_CLBCNT_DELTA_INT BIT(2)
#define SC27XX_FGU_MODE_AREA_MASK GENMASK(15, 12)
#define SC27XX_FGU_CAP_AREA_MASK GENMASK(11, 0)
#define SC27XX_FGU_MODE_AREA_SHIFT 12
#define SC27XX_FGU_FIRST_POWERTON GENMASK(3, 0)
#define SC27XX_FGU_DEFAULT_CAP GENMASK(11, 0)
#define SC27XX_FGU_NORMAIL_POWERTON 0x5
#define SC27XX_FGU_CUR_BASIC_ADC 8192
#define SC27XX_FGU_SAMPLE_HZ 2
/* micro Ohms */
#define SC27XX_FGU_IDEAL_RESISTANCE 20000
/*
* struct sc27xx_fgu_data: describe the FGU device
* @regmap: regmap for register access
* @dev: platform device
* @battery: battery power supply
* @base: the base offset for the controller
* @lock: protect the structure
* @gpiod: GPIO for battery detection
* @channel: IIO channel to get battery temperature
* @charge_chan: IIO channel to get charge voltage
* @internal_resist: the battery internal resistance in mOhm
* @total_cap: the total capacity of the battery in mAh
* @init_cap: the initial capacity of the battery in mAh
* @alarm_cap: the alarm capacity
* @init_clbcnt: the initial coulomb counter
* @max_volt: the maximum constant input voltage in millivolt
* @min_volt: the minimum drained battery voltage in microvolt
* @boot_volt: the voltage measured during boot in microvolt
* @table_len: the capacity table length
* @resist_table_len: the resistance table length
* @cur_1000ma_adc: ADC value corresponding to 1000 mA
* @vol_1000mv_adc: ADC value corresponding to 1000 mV
* @calib_resist: the real resistance of coulomb counter chip in uOhm
* @cap_table: capacity table with corresponding ocv
* @resist_table: resistance percent table with corresponding temperature
*/
struct sc27xx_fgu_data {
struct regmap *regmap;
struct device *dev;
struct power_supply *battery;
u32 base;
struct mutex lock;
struct gpio_desc *gpiod;
struct iio_channel *channel;
struct iio_channel *charge_chan;
bool bat_present;
int internal_resist;
int total_cap;
int init_cap;
int alarm_cap;
int init_clbcnt;
int max_volt;
int min_volt;
int boot_volt;
int table_len;
int resist_table_len;
int cur_1000ma_adc;
int vol_1000mv_adc;
int calib_resist;
struct power_supply_battery_ocv_table *cap_table;
struct power_supply_resistance_temp_table *resist_table;
};
static int sc27xx_fgu_cap_to_clbcnt(struct sc27xx_fgu_data *data, int capacity);
static void sc27xx_fgu_capacity_calibration(struct sc27xx_fgu_data *data,
int cap, bool int_mode);
static void sc27xx_fgu_adjust_cap(struct sc27xx_fgu_data *data, int cap);
static int sc27xx_fgu_get_temp(struct sc27xx_fgu_data *data, int *temp);
static const char * const sc27xx_charger_supply_name[] = {
"sc2731_charger",
"sc2720_charger",
"sc2721_charger",
"sc2723_charger",
};
static int sc27xx_fgu_adc_to_current(struct sc27xx_fgu_data *data, s64 adc)
{
return DIV_S64_ROUND_CLOSEST(adc * 1000, data->cur_1000ma_adc);
}
static int sc27xx_fgu_adc_to_voltage(struct sc27xx_fgu_data *data, s64 adc)
{
return DIV_S64_ROUND_CLOSEST(adc * 1000, data->vol_1000mv_adc);
}
static int sc27xx_fgu_voltage_to_adc(struct sc27xx_fgu_data *data, int vol)
{
return DIV_ROUND_CLOSEST(vol * data->vol_1000mv_adc, 1000);
}
static bool sc27xx_fgu_is_first_poweron(struct sc27xx_fgu_data *data)
{
int ret, status, cap, mode;
ret = regmap_read(data->regmap,
data->base + SC27XX_FGU_USER_AREA_STATUS, &status);
if (ret)
return false;
/*
* We use low 4 bits to save the last battery capacity and high 12 bits
* to save the system boot mode.
*/
mode = (status & SC27XX_FGU_MODE_AREA_MASK) >> SC27XX_FGU_MODE_AREA_SHIFT;
cap = status & SC27XX_FGU_CAP_AREA_MASK;
/*
* When FGU has been powered down, the user area registers became
* default value (0xffff), which can be used to valid if the system is
* first power on or not.
*/
if (mode == SC27XX_FGU_FIRST_POWERTON || cap == SC27XX_FGU_DEFAULT_CAP)
return true;
return false;
}
static int sc27xx_fgu_save_boot_mode(struct sc27xx_fgu_data *data,
int boot_mode)
{
int ret;
ret = regmap_update_bits(data->regmap,
data->base + SC27XX_FGU_USER_AREA_CLEAR,
SC27XX_FGU_MODE_AREA_MASK,
SC27XX_FGU_MODE_AREA_MASK);
if (ret)
return ret;
/*
* Since the user area registers are put on power always-on region,
* then these registers changing time will be a little long. Thus
* here we should delay 200us to wait until values are updated
* successfully according to the datasheet.
*/
udelay(200);
ret = regmap_update_bits(data->regmap,
data->base + SC27XX_FGU_USER_AREA_SET,
SC27XX_FGU_MODE_AREA_MASK,
boot_mode << SC27XX_FGU_MODE_AREA_SHIFT);
if (ret)
return ret;
/*
* Since the user area registers are put on power always-on region,
* then these registers changing time will be a little long. Thus
* here we should delay 200us to wait until values are updated
* successfully according to the datasheet.
*/
udelay(200);
/*
* According to the datasheet, we should set the USER_AREA_CLEAR to 0 to
* make the user area data available, otherwise we can not save the user
* area data.
*/
return regmap_update_bits(data->regmap,
data->base + SC27XX_FGU_USER_AREA_CLEAR,
SC27XX_FGU_MODE_AREA_MASK, 0);
}
static int sc27xx_fgu_save_last_cap(struct sc27xx_fgu_data *data, int cap)
{
int ret;
ret = regmap_update_bits(data->regmap,
data->base + SC27XX_FGU_USER_AREA_CLEAR,
SC27XX_FGU_CAP_AREA_MASK,
SC27XX_FGU_CAP_AREA_MASK);
if (ret)
return ret;
/*
* Since the user area registers are put on power always-on region,
* then these registers changing time will be a little long. Thus
* here we should delay 200us to wait until values are updated
* successfully according to the datasheet.
*/
udelay(200);
ret = regmap_update_bits(data->regmap,
data->base + SC27XX_FGU_USER_AREA_SET,
SC27XX_FGU_CAP_AREA_MASK, cap);
if (ret)
return ret;
/*
* Since the user area registers are put on power always-on region,
* then these registers changing time will be a little long. Thus
* here we should delay 200us to wait until values are updated
* successfully according to the datasheet.
*/
udelay(200);
/*
* According to the datasheet, we should set the USER_AREA_CLEAR to 0 to
* make the user area data available, otherwise we can not save the user
* area data.
*/
return regmap_update_bits(data->regmap,
data->base + SC27XX_FGU_USER_AREA_CLEAR,
SC27XX_FGU_CAP_AREA_MASK, 0);
}
static int sc27xx_fgu_read_last_cap(struct sc27xx_fgu_data *data, int *cap)
{
int ret, value;
ret = regmap_read(data->regmap,
data->base + SC27XX_FGU_USER_AREA_STATUS, &value);
if (ret)
return ret;
*cap = value & SC27XX_FGU_CAP_AREA_MASK;
return 0;
}
/*
* When system boots on, we can not read battery capacity from coulomb
* registers, since now the coulomb registers are invalid. So we should
* calculate the battery open circuit voltage, and get current battery
* capacity according to the capacity table.
*/
static int sc27xx_fgu_get_boot_capacity(struct sc27xx_fgu_data *data, int *cap)
{
int volt, cur, oci, ocv, ret;
bool is_first_poweron = sc27xx_fgu_is_first_poweron(data);
/*
* If system is not the first power on, we should use the last saved
* battery capacity as the initial battery capacity. Otherwise we should
* re-calculate the initial battery capacity.
*/
if (!is_first_poweron) {
ret = sc27xx_fgu_read_last_cap(data, cap);
if (ret)
return ret;
return sc27xx_fgu_save_boot_mode(data, SC27XX_FGU_NORMAIL_POWERTON);
}
/*
* After system booting on, the SC27XX_FGU_CLBCNT_QMAXL register saved
* the first sampled open circuit current.
*/
ret = regmap_read(data->regmap, data->base + SC27XX_FGU_CLBCNT_QMAXL,
&cur);
if (ret)
return ret;
cur <<= 1;
oci = sc27xx_fgu_adc_to_current(data, cur - SC27XX_FGU_CUR_BASIC_ADC);
/*
* Should get the OCV from SC27XX_FGU_POCV register at the system
* beginning. It is ADC values reading from registers which need to
* convert the corresponding voltage.
*/
ret = regmap_read(data->regmap, data->base + SC27XX_FGU_POCV, &volt);
if (ret)
return ret;
volt = sc27xx_fgu_adc_to_voltage(data, volt);
ocv = volt * 1000 - oci * data->internal_resist;
data->boot_volt = ocv;
/*
* Parse the capacity table to look up the correct capacity percent
* according to current battery's corresponding OCV values.
*/
*cap = power_supply_ocv2cap_simple(data->cap_table, data->table_len,
ocv);
ret = sc27xx_fgu_save_last_cap(data, *cap);
if (ret)
return ret;
return sc27xx_fgu_save_boot_mode(data, SC27XX_FGU_NORMAIL_POWERTON);
}
static int sc27xx_fgu_set_clbcnt(struct sc27xx_fgu_data *data, int clbcnt)
{
int ret;
ret = regmap_update_bits(data->regmap,
data->base + SC27XX_FGU_CLBCNT_SETL,
SC27XX_FGU_CLBCNT_MASK, clbcnt);
if (ret)
return ret;
ret = regmap_update_bits(data->regmap,
data->base + SC27XX_FGU_CLBCNT_SETH,
SC27XX_FGU_CLBCNT_MASK,
clbcnt >> SC27XX_FGU_CLBCNT_SHIFT);
if (ret)
return ret;
return regmap_update_bits(data->regmap, data->base + SC27XX_FGU_START,
SC27XX_WRITE_SELCLB_EN,
SC27XX_WRITE_SELCLB_EN);
}
static int sc27xx_fgu_get_clbcnt(struct sc27xx_fgu_data *data, int *clb_cnt)
{
int ccl, cch, ret;
ret = regmap_read(data->regmap, data->base + SC27XX_FGU_CLBCNT_VALL,
&ccl);
if (ret)
return ret;
ret = regmap_read(data->regmap, data->base + SC27XX_FGU_CLBCNT_VALH,
&cch);
if (ret)
return ret;
*clb_cnt = ccl & SC27XX_FGU_CLBCNT_MASK;
*clb_cnt |= (cch & SC27XX_FGU_CLBCNT_MASK) << SC27XX_FGU_CLBCNT_SHIFT;
return 0;
}
static int sc27xx_fgu_get_vol_now(struct sc27xx_fgu_data *data, int *val)
{
int ret;
u32 vol;
ret = regmap_read(data->regmap, data->base + SC27XX_FGU_VOLTAGE_BUF,
&vol);
if (ret)
return ret;
/*
* It is ADC values reading from registers which need to convert to
* corresponding voltage values.
*/
*val = sc27xx_fgu_adc_to_voltage(data, vol);
return 0;
}
static int sc27xx_fgu_get_cur_now(struct sc27xx_fgu_data *data, int *val)
{
int ret;
u32 cur;
ret = regmap_read(data->regmap, data->base + SC27XX_FGU_CURRENT_BUF,
&cur);
if (ret)
return ret;
/*
* It is ADC values reading from registers which need to convert to
* corresponding current values.
*/
*val = sc27xx_fgu_adc_to_current(data, cur - SC27XX_FGU_CUR_BASIC_ADC);
return 0;
}
static int sc27xx_fgu_get_capacity(struct sc27xx_fgu_data *data, int *cap)
{
int ret, cur_clbcnt, delta_clbcnt, delta_cap, temp;
/* Get current coulomb counters firstly */
ret = sc27xx_fgu_get_clbcnt(data, &cur_clbcnt);
if (ret)
return ret;
delta_clbcnt = cur_clbcnt - data->init_clbcnt;
/*
* Convert coulomb counter to delta capacity (mAh), and set multiplier
* as 10 to improve the precision.
*/
temp = DIV_ROUND_CLOSEST(delta_clbcnt * 10, 36 * SC27XX_FGU_SAMPLE_HZ);
temp = sc27xx_fgu_adc_to_current(data, temp / 1000);
/*
* Convert to capacity percent of the battery total capacity,
* and multiplier is 100 too.
*/
delta_cap = DIV_ROUND_CLOSEST(temp * 100, data->total_cap);
*cap = delta_cap + data->init_cap;
/* Calibrate the battery capacity in a normal range. */
sc27xx_fgu_capacity_calibration(data, *cap, false);
return 0;
}
static int sc27xx_fgu_get_vbat_vol(struct sc27xx_fgu_data *data, int *val)
{
int ret, vol;
ret = regmap_read(data->regmap, data->base + SC27XX_FGU_VOLTAGE, &vol);
if (ret)
return ret;
/*
* It is ADC values reading from registers which need to convert to
* corresponding voltage values.
*/
*val = sc27xx_fgu_adc_to_voltage(data, vol);
return 0;
}
static int sc27xx_fgu_get_current(struct sc27xx_fgu_data *data, int *val)
{
int ret, cur;
ret = regmap_read(data->regmap, data->base + SC27XX_FGU_CURRENT, &cur);
if (ret)
return ret;
/*
* It is ADC values reading from registers which need to convert to
* corresponding current values.
*/
*val = sc27xx_fgu_adc_to_current(data, cur - SC27XX_FGU_CUR_BASIC_ADC);
return 0;
}
static int sc27xx_fgu_get_vbat_ocv(struct sc27xx_fgu_data *data, int *val)
{
int vol, cur, ret, temp, resistance;
ret = sc27xx_fgu_get_vbat_vol(data, &vol);
if (ret)
return ret;
ret = sc27xx_fgu_get_current(data, &cur);
if (ret)
return ret;
resistance = data->internal_resist;
if (data->resist_table_len > 0) {
ret = sc27xx_fgu_get_temp(data, &temp);
if (ret)
return ret;
resistance = power_supply_temp2resist_simple(data->resist_table,
data->resist_table_len, temp);
resistance = data->internal_resist * resistance / 100;
}
/* Return the battery OCV in micro volts. */
*val = vol * 1000 - cur * resistance;
return 0;
}
static int sc27xx_fgu_get_charge_vol(struct sc27xx_fgu_data *data, int *val)
{
int ret, vol;
ret = iio_read_channel_processed(data->charge_chan, &vol);
if (ret < 0)
return ret;
*val = vol * 1000;
return 0;
}
static int sc27xx_fgu_get_temp(struct sc27xx_fgu_data *data, int *temp)
{
return iio_read_channel_processed(data->channel, temp);
}
static int sc27xx_fgu_get_health(struct sc27xx_fgu_data *data, int *health)
{
int ret, vol;
ret = sc27xx_fgu_get_vbat_vol(data, &vol);
if (ret)
return ret;
if (vol > data->max_volt)
*health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
else
*health = POWER_SUPPLY_HEALTH_GOOD;
return 0;
}
static int sc27xx_fgu_get_status(struct sc27xx_fgu_data *data, int *status)
{
union power_supply_propval val;
struct power_supply *psy;
int i, ret = -EINVAL;
for (i = 0; i < ARRAY_SIZE(sc27xx_charger_supply_name); i++) {
psy = power_supply_get_by_name(sc27xx_charger_supply_name[i]);
if (!psy)
continue;
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_STATUS,
&val);
power_supply_put(psy);
if (ret)
return ret;
*status = val.intval;
}
return ret;
}
static int sc27xx_fgu_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct sc27xx_fgu_data *data = power_supply_get_drvdata(psy);
int ret = 0;
int value;
mutex_lock(&data->lock);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
ret = sc27xx_fgu_get_status(data, &value);
if (ret)
goto error;
val->intval = value;
break;
case POWER_SUPPLY_PROP_HEALTH:
ret = sc27xx_fgu_get_health(data, &value);
if (ret)
goto error;
val->intval = value;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = data->bat_present;
break;
case POWER_SUPPLY_PROP_TEMP:
ret = sc27xx_fgu_get_temp(data, &value);
if (ret)
goto error;
val->intval = value;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
break;
case POWER_SUPPLY_PROP_CAPACITY:
ret = sc27xx_fgu_get_capacity(data, &value);
if (ret)
goto error;
val->intval = value;
break;
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
ret = sc27xx_fgu_get_vbat_vol(data, &value);
if (ret)
goto error;
val->intval = value * 1000;
break;
case POWER_SUPPLY_PROP_VOLTAGE_OCV:
ret = sc27xx_fgu_get_vbat_ocv(data, &value);
if (ret)
goto error;
val->intval = value;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = sc27xx_fgu_get_charge_vol(data, &value);
if (ret)
goto error;
val->intval = value;
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
ret = sc27xx_fgu_get_current(data, &value);
if (ret)
goto error;
val->intval = value * 1000;
break;
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
val->intval = data->total_cap * 1000;
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
ret = sc27xx_fgu_get_clbcnt(data, &value);
if (ret)
goto error;
value = DIV_ROUND_CLOSEST(value * 10,
36 * SC27XX_FGU_SAMPLE_HZ);
val->intval = sc27xx_fgu_adc_to_current(data, value);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = sc27xx_fgu_get_vol_now(data, &value);
if (ret)
goto error;
val->intval = value * 1000;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = sc27xx_fgu_get_cur_now(data, &value);
if (ret)
goto error;
val->intval = value * 1000;
break;
case POWER_SUPPLY_PROP_VOLTAGE_BOOT:
val->intval = data->boot_volt;
break;
default:
ret = -EINVAL;
break;
}
error:
mutex_unlock(&data->lock);
return ret;
}
static int sc27xx_fgu_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct sc27xx_fgu_data *data = power_supply_get_drvdata(psy);
int ret;
mutex_lock(&data->lock);
switch (psp) {
case POWER_SUPPLY_PROP_CAPACITY:
ret = sc27xx_fgu_save_last_cap(data, val->intval);
if (ret < 0)
dev_err(data->dev, "failed to save battery capacity\n");
break;
case POWER_SUPPLY_PROP_CALIBRATE:
sc27xx_fgu_adjust_cap(data, val->intval);
ret = 0;
break;
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
data->total_cap = val->intval / 1000;
ret = 0;
break;
default:
ret = -EINVAL;
}
mutex_unlock(&data->lock);
return ret;
}
static int sc27xx_fgu_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
return psp == POWER_SUPPLY_PROP_CAPACITY ||
psp == POWER_SUPPLY_PROP_CALIBRATE ||
psp == POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN;
}
static enum power_supply_property sc27xx_fgu_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_OCV,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_VOLTAGE_BOOT,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
POWER_SUPPLY_PROP_CALIBRATE,
POWER_SUPPLY_PROP_CHARGE_NOW
};
static const struct power_supply_desc sc27xx_fgu_desc = {
.name = "sc27xx-fgu",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = sc27xx_fgu_props,
.num_properties = ARRAY_SIZE(sc27xx_fgu_props),
.get_property = sc27xx_fgu_get_property,
.set_property = sc27xx_fgu_set_property,
.external_power_changed = power_supply_changed,
.property_is_writeable = sc27xx_fgu_property_is_writeable,
.no_thermal = true,
};
static void sc27xx_fgu_adjust_cap(struct sc27xx_fgu_data *data, int cap)
{
int ret;
data->init_cap = cap;
ret = sc27xx_fgu_get_clbcnt(data, &data->init_clbcnt);
if (ret)
dev_err(data->dev, "failed to get init coulomb counter\n");
}
static void sc27xx_fgu_capacity_calibration(struct sc27xx_fgu_data *data,
int cap, bool int_mode)
{
int ret, ocv, chg_sts, adc;
ret = sc27xx_fgu_get_vbat_ocv(data, &ocv);
if (ret) {
dev_err(data->dev, "get battery ocv error.\n");
return;
}
ret = sc27xx_fgu_get_status(data, &chg_sts);
if (ret) {
dev_err(data->dev, "get charger status error.\n");
return;
}
/*
* If we are in charging mode, then we do not need to calibrate the
* lower capacity.
*/
if (chg_sts == POWER_SUPPLY_STATUS_CHARGING)
return;
if ((ocv > data->cap_table[0].ocv && cap < 100) || cap > 100) {
/*
* If current OCV value is larger than the max OCV value in
* OCV table, or the current capacity is larger than 100,
* we should force the inititial capacity to 100.
*/
sc27xx_fgu_adjust_cap(data, 100);
} else if (ocv <= data->cap_table[data->table_len - 1].ocv) {
/*
* If current OCV value is leass than the minimum OCV value in
* OCV table, we should force the inititial capacity to 0.
*/
sc27xx_fgu_adjust_cap(data, 0);
} else if ((ocv > data->cap_table[data->table_len - 1].ocv && cap <= 0) ||
(ocv > data->min_volt && cap <= data->alarm_cap)) {
/*
* If current OCV value is not matchable with current capacity,
* we should re-calculate current capacity by looking up the
* OCV table.
*/
int cur_cap = power_supply_ocv2cap_simple(data->cap_table,
data->table_len, ocv);
sc27xx_fgu_adjust_cap(data, cur_cap);
} else if (ocv <= data->min_volt) {
/*
* If current OCV value is less than the low alarm voltage, but
* current capacity is larger than the alarm capacity, we should
* adjust the inititial capacity to alarm capacity.
*/
if (cap > data->alarm_cap) {
sc27xx_fgu_adjust_cap(data, data->alarm_cap);
} else {
int cur_cap;
/*
* If current capacity is equal with 0 or less than 0
* (some error occurs), we should adjust inititial
* capacity to the capacity corresponding to current OCV
* value.
*/
cur_cap = power_supply_ocv2cap_simple(data->cap_table,
data->table_len,
ocv);
sc27xx_fgu_adjust_cap(data, cur_cap);
}
if (!int_mode)
return;
/*
* After adjusting the battery capacity, we should set the
* lowest alarm voltage instead.
*/
data->min_volt = data->cap_table[data->table_len - 1].ocv;
data->alarm_cap = power_supply_ocv2cap_simple(data->cap_table,
data->table_len,
data->min_volt);
adc = sc27xx_fgu_voltage_to_adc(data, data->min_volt / 1000);
regmap_update_bits(data->regmap,
data->base + SC27XX_FGU_LOW_OVERLOAD,
SC27XX_FGU_LOW_OVERLOAD_MASK, adc);
}
}
static irqreturn_t sc27xx_fgu_interrupt(int irq, void *dev_id)
{
struct sc27xx_fgu_data *data = dev_id;
int ret, cap;
u32 status;
mutex_lock(&data->lock);
ret = regmap_read(data->regmap, data->base + SC27XX_FGU_INT_STS,
&status);
if (ret)
goto out;
ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_CLR,
status, status);
if (ret)
goto out;
/*
* When low overload voltage interrupt happens, we should calibrate the
* battery capacity in lower voltage stage.
*/
if (!(status & SC27XX_FGU_LOW_OVERLOAD_INT))
goto out;
ret = sc27xx_fgu_get_capacity(data, &cap);
if (ret)
goto out;
sc27xx_fgu_capacity_calibration(data, cap, true);
out:
mutex_unlock(&data->lock);
power_supply_changed(data->battery);
return IRQ_HANDLED;
}
static irqreturn_t sc27xx_fgu_bat_detection(int irq, void *dev_id)
{
struct sc27xx_fgu_data *data = dev_id;
int state;
mutex_lock(&data->lock);
state = gpiod_get_value_cansleep(data->gpiod);
if (state < 0) {
dev_err(data->dev, "failed to get gpio state\n");
mutex_unlock(&data->lock);
return IRQ_RETVAL(state);
}
data->bat_present = !!state;
mutex_unlock(&data->lock);
power_supply_changed(data->battery);
return IRQ_HANDLED;
}
static void sc27xx_fgu_disable(void *_data)
{
struct sc27xx_fgu_data *data = _data;
regmap_update_bits(data->regmap, SC27XX_CLK_EN0, SC27XX_FGU_RTC_EN, 0);
regmap_update_bits(data->regmap, SC27XX_MODULE_EN0, SC27XX_FGU_EN, 0);
}
static int sc27xx_fgu_cap_to_clbcnt(struct sc27xx_fgu_data *data, int capacity)
{
/*
* Get current capacity (mAh) = battery total capacity (mAh) *
* current capacity percent (capacity / 100).
*/
int cur_cap = DIV_ROUND_CLOSEST(data->total_cap * capacity, 100);
/*
* Convert current capacity (mAh) to coulomb counter according to the
* formula: 1 mAh =3.6 coulomb.
*/
return DIV_ROUND_CLOSEST(cur_cap * 36 * data->cur_1000ma_adc * SC27XX_FGU_SAMPLE_HZ, 10);
}
static int sc27xx_fgu_calibration(struct sc27xx_fgu_data *data)
{
struct nvmem_cell *cell;
int calib_data, cal_4200mv;
void *buf;
size_t len;
cell = nvmem_cell_get(data->dev, "fgu_calib");
if (IS_ERR(cell))
return PTR_ERR(cell);
buf = nvmem_cell_read(cell, &len);
nvmem_cell_put(cell);
if (IS_ERR(buf))
return PTR_ERR(buf);
memcpy(&calib_data, buf, min(len, sizeof(u32)));
/*
* Get the ADC value corresponding to 4200 mV from eFuse controller
* according to below formula. Then convert to ADC values corresponding
* to 1000 mV and 1000 mA.
*/
cal_4200mv = (calib_data & 0x1ff) + 6963 - 4096 - 256;
data->vol_1000mv_adc = DIV_ROUND_CLOSEST(cal_4200mv * 10, 42);
data->cur_1000ma_adc =
DIV_ROUND_CLOSEST(data->vol_1000mv_adc * 4 * data->calib_resist,
SC27XX_FGU_IDEAL_RESISTANCE);
kfree(buf);
return 0;
}
static int sc27xx_fgu_hw_init(struct sc27xx_fgu_data *data)
{
struct power_supply_battery_info *info;
struct power_supply_battery_ocv_table *table;
int ret, delta_clbcnt, alarm_adc;
ret = power_supply_get_battery_info(data->battery, &info);
if (ret) {
dev_err(data->dev, "failed to get battery information\n");
return ret;
}
data->total_cap = info->charge_full_design_uah / 1000;
data->max_volt = info->constant_charge_voltage_max_uv / 1000;
data->internal_resist = info->factory_internal_resistance_uohm / 1000;
data->min_volt = info->voltage_min_design_uv;
/*
* For SC27XX fuel gauge device, we only use one ocv-capacity
* table in normal temperature 20 Celsius.
*/
table = power_supply_find_ocv2cap_table(info, 20, &data->table_len);
if (!table)
return -EINVAL;
data->cap_table = devm_kmemdup(data->dev, table,
data->table_len * sizeof(*table),
GFP_KERNEL);
if (!data->cap_table) {
power_supply_put_battery_info(data->battery, info);
return -ENOMEM;
}
data->alarm_cap = power_supply_ocv2cap_simple(data->cap_table,
data->table_len,
data->min_volt);
if (!data->alarm_cap)
data->alarm_cap += 1;
data->resist_table_len = info->resist_table_size;
if (data->resist_table_len > 0) {
data->resist_table = devm_kmemdup(data->dev, info->resist_table,
data->resist_table_len *
sizeof(struct power_supply_resistance_temp_table),
GFP_KERNEL);
if (!data->resist_table) {
power_supply_put_battery_info(data->battery, info);
return -ENOMEM;
}
}
power_supply_put_battery_info(data->battery, info);
ret = sc27xx_fgu_calibration(data);
if (ret)
return ret;
/* Enable the FGU module */
ret = regmap_update_bits(data->regmap, SC27XX_MODULE_EN0,
SC27XX_FGU_EN, SC27XX_FGU_EN);
if (ret) {
dev_err(data->dev, "failed to enable fgu\n");
return ret;
}
/* Enable the FGU RTC clock to make it work */
ret = regmap_update_bits(data->regmap, SC27XX_CLK_EN0,
SC27XX_FGU_RTC_EN, SC27XX_FGU_RTC_EN);
if (ret) {
dev_err(data->dev, "failed to enable fgu RTC clock\n");
goto disable_fgu;
}
ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_CLR,
SC27XX_FGU_INT_MASK, SC27XX_FGU_INT_MASK);
if (ret) {
dev_err(data->dev, "failed to clear interrupt status\n");
goto disable_clk;
}
/*
* Set the voltage low overload threshold, which means when the battery
* voltage is lower than this threshold, the controller will generate
* one interrupt to notify.
*/
alarm_adc = sc27xx_fgu_voltage_to_adc(data, data->min_volt / 1000);
ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_LOW_OVERLOAD,
SC27XX_FGU_LOW_OVERLOAD_MASK, alarm_adc);
if (ret) {
dev_err(data->dev, "failed to set fgu low overload\n");
goto disable_clk;
}
/*
* Set the coulomb counter delta threshold, that means when the coulomb
* counter change is multiples of the delta threshold, the controller
* will generate one interrupt to notify the users to update the battery
* capacity. Now we set the delta threshold as a counter value of 1%
* capacity.
*/
delta_clbcnt = sc27xx_fgu_cap_to_clbcnt(data, 1);
ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_CLBCNT_DELTL,
SC27XX_FGU_CLBCNT_MASK, delta_clbcnt);
if (ret) {
dev_err(data->dev, "failed to set low delta coulomb counter\n");
goto disable_clk;
}
ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_CLBCNT_DELTH,
SC27XX_FGU_CLBCNT_MASK,
delta_clbcnt >> SC27XX_FGU_CLBCNT_SHIFT);
if (ret) {
dev_err(data->dev, "failed to set high delta coulomb counter\n");
goto disable_clk;
}
/*
* Get the boot battery capacity when system powers on, which is used to
* initialize the coulomb counter. After that, we can read the coulomb
* counter to measure the battery capacity.
*/
ret = sc27xx_fgu_get_boot_capacity(data, &data->init_cap);
if (ret) {
dev_err(data->dev, "failed to get boot capacity\n");
goto disable_clk;
}
/*
* Convert battery capacity to the corresponding initial coulomb counter
* and set into coulomb counter registers.
*/
data->init_clbcnt = sc27xx_fgu_cap_to_clbcnt(data, data->init_cap);
ret = sc27xx_fgu_set_clbcnt(data, data->init_clbcnt);
if (ret) {
dev_err(data->dev, "failed to initialize coulomb counter\n");
goto disable_clk;
}
return 0;
disable_clk:
regmap_update_bits(data->regmap, SC27XX_CLK_EN0, SC27XX_FGU_RTC_EN, 0);
disable_fgu:
regmap_update_bits(data->regmap, SC27XX_MODULE_EN0, SC27XX_FGU_EN, 0);
return ret;
}
static int sc27xx_fgu_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct power_supply_config fgu_cfg = { };
struct sc27xx_fgu_data *data;
int ret, irq;
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->regmap = dev_get_regmap(dev->parent, NULL);
if (!data->regmap) {
dev_err(dev, "failed to get regmap\n");
return -ENODEV;
}
ret = device_property_read_u32(dev, "reg", &data->base);
if (ret) {
dev_err(dev, "failed to get fgu address\n");
return ret;
}
ret = device_property_read_u32(&pdev->dev,
"sprd,calib-resistance-micro-ohms",
&data->calib_resist);
if (ret) {
dev_err(&pdev->dev,
"failed to get fgu calibration resistance\n");
return ret;
}
data->channel = devm_iio_channel_get(dev, "bat-temp");
if (IS_ERR(data->channel)) {
dev_err(dev, "failed to get IIO channel\n");
return PTR_ERR(data->channel);
}
data->charge_chan = devm_iio_channel_get(dev, "charge-vol");
if (IS_ERR(data->charge_chan)) {
dev_err(dev, "failed to get charge IIO channel\n");
return PTR_ERR(data->charge_chan);
}
data->gpiod = devm_gpiod_get(dev, "bat-detect", GPIOD_IN);
if (IS_ERR(data->gpiod)) {
dev_err(dev, "failed to get battery detection GPIO\n");
return PTR_ERR(data->gpiod);
}
ret = gpiod_get_value_cansleep(data->gpiod);
if (ret < 0) {
dev_err(dev, "failed to get gpio state\n");
return ret;
}
data->bat_present = !!ret;
mutex_init(&data->lock);
data->dev = dev;
platform_set_drvdata(pdev, data);
fgu_cfg.drv_data = data;
fgu_cfg.of_node = np;
data->battery = devm_power_supply_register(dev, &sc27xx_fgu_desc,
&fgu_cfg);
if (IS_ERR(data->battery)) {
dev_err(dev, "failed to register power supply\n");
return PTR_ERR(data->battery);
}
ret = sc27xx_fgu_hw_init(data);
if (ret) {
dev_err(dev, "failed to initialize fgu hardware\n");
return ret;
}
ret = devm_add_action_or_reset(dev, sc27xx_fgu_disable, data);
if (ret) {
dev_err(dev, "failed to add fgu disable action\n");
return ret;
}
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
ret = devm_request_threaded_irq(data->dev, irq, NULL,
sc27xx_fgu_interrupt,
IRQF_NO_SUSPEND | IRQF_ONESHOT,
pdev->name, data);
if (ret) {
dev_err(data->dev, "failed to request fgu IRQ\n");
return ret;
}
irq = gpiod_to_irq(data->gpiod);
if (irq < 0) {
dev_err(dev, "failed to translate GPIO to IRQ\n");
return irq;
}
ret = devm_request_threaded_irq(dev, irq, NULL,
sc27xx_fgu_bat_detection,
IRQF_ONESHOT | IRQF_TRIGGER_RISING |
IRQF_TRIGGER_FALLING,
pdev->name, data);
if (ret) {
dev_err(dev, "failed to request IRQ\n");
return ret;
}
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int sc27xx_fgu_resume(struct device *dev)
{
struct sc27xx_fgu_data *data = dev_get_drvdata(dev);
int ret;
ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_EN,
SC27XX_FGU_LOW_OVERLOAD_INT |
SC27XX_FGU_CLBCNT_DELTA_INT, 0);
if (ret) {
dev_err(data->dev, "failed to disable fgu interrupts\n");
return ret;
}
return 0;
}
static int sc27xx_fgu_suspend(struct device *dev)
{
struct sc27xx_fgu_data *data = dev_get_drvdata(dev);
int ret, status, ocv;
ret = sc27xx_fgu_get_status(data, &status);
if (ret)
return ret;
/*
* If we are charging, then no need to enable the FGU interrupts to
* adjust the battery capacity.
*/
if (status != POWER_SUPPLY_STATUS_NOT_CHARGING &&
status != POWER_SUPPLY_STATUS_DISCHARGING)
return 0;
ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_EN,
SC27XX_FGU_LOW_OVERLOAD_INT,
SC27XX_FGU_LOW_OVERLOAD_INT);
if (ret) {
dev_err(data->dev, "failed to enable low voltage interrupt\n");
return ret;
}
ret = sc27xx_fgu_get_vbat_ocv(data, &ocv);
if (ret)
goto disable_int;
/*
* If current OCV is less than the minimum voltage, we should enable the
* coulomb counter threshold interrupt to notify events to adjust the
* battery capacity.
*/
if (ocv < data->min_volt) {
ret = regmap_update_bits(data->regmap,
data->base + SC27XX_FGU_INT_EN,
SC27XX_FGU_CLBCNT_DELTA_INT,
SC27XX_FGU_CLBCNT_DELTA_INT);
if (ret) {
dev_err(data->dev,
"failed to enable coulomb threshold int\n");
goto disable_int;
}
}
return 0;
disable_int:
regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_EN,
SC27XX_FGU_LOW_OVERLOAD_INT, 0);
return ret;
}
#endif
static const struct dev_pm_ops sc27xx_fgu_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(sc27xx_fgu_suspend, sc27xx_fgu_resume)
};
static const struct of_device_id sc27xx_fgu_of_match[] = {
{ .compatible = "sprd,sc2731-fgu", },
{ }
};
MODULE_DEVICE_TABLE(of, sc27xx_fgu_of_match);
static struct platform_driver sc27xx_fgu_driver = {
.probe = sc27xx_fgu_probe,
.driver = {
.name = "sc27xx-fgu",
.of_match_table = sc27xx_fgu_of_match,
.pm = &sc27xx_fgu_pm_ops,
}
};
module_platform_driver(sc27xx_fgu_driver);
MODULE_DESCRIPTION("Spreadtrum SC27XX PMICs Fual Gauge Unit Driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/power/supply/sc27xx_fuel_gauge.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2016, Prodys S.L.
*
* This adds support for sbs-charger compilant chips as defined here:
* http://sbs-forum.org/specs/sbc110.pdf
*
* Implemetation based on sbs-battery.c
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/power_supply.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/regmap.h>
#include <linux/bitops.h>
#include <linux/devm-helpers.h>
#define SBS_CHARGER_REG_SPEC_INFO 0x11
#define SBS_CHARGER_REG_STATUS 0x13
#define SBS_CHARGER_REG_ALARM_WARNING 0x16
#define SBS_CHARGER_STATUS_CHARGE_INHIBITED BIT(0)
#define SBS_CHARGER_STATUS_RES_COLD BIT(9)
#define SBS_CHARGER_STATUS_RES_HOT BIT(10)
#define SBS_CHARGER_STATUS_BATTERY_PRESENT BIT(14)
#define SBS_CHARGER_STATUS_AC_PRESENT BIT(15)
#define SBS_CHARGER_POLL_TIME 500
struct sbs_info {
struct i2c_client *client;
struct power_supply *power_supply;
struct regmap *regmap;
struct delayed_work work;
unsigned int last_state;
};
static int sbs_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct sbs_info *chip = power_supply_get_drvdata(psy);
unsigned int reg;
reg = chip->last_state;
switch (psp) {
case POWER_SUPPLY_PROP_PRESENT:
val->intval = !!(reg & SBS_CHARGER_STATUS_BATTERY_PRESENT);
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = !!(reg & SBS_CHARGER_STATUS_AC_PRESENT);
break;
case POWER_SUPPLY_PROP_STATUS:
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
if (!(reg & SBS_CHARGER_STATUS_BATTERY_PRESENT))
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
else if (reg & SBS_CHARGER_STATUS_AC_PRESENT &&
!(reg & SBS_CHARGER_STATUS_CHARGE_INHIBITED))
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
break;
case POWER_SUPPLY_PROP_HEALTH:
if (reg & SBS_CHARGER_STATUS_RES_COLD)
val->intval = POWER_SUPPLY_HEALTH_COLD;
if (reg & SBS_CHARGER_STATUS_RES_HOT)
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
else
val->intval = POWER_SUPPLY_HEALTH_GOOD;
break;
default:
return -EINVAL;
}
return 0;
}
static int sbs_check_state(struct sbs_info *chip)
{
unsigned int reg;
int ret;
ret = regmap_read(chip->regmap, SBS_CHARGER_REG_STATUS, ®);
if (!ret && reg != chip->last_state) {
chip->last_state = reg;
power_supply_changed(chip->power_supply);
return 1;
}
return 0;
}
static void sbs_delayed_work(struct work_struct *work)
{
struct sbs_info *chip = container_of(work, struct sbs_info, work.work);
sbs_check_state(chip);
schedule_delayed_work(&chip->work,
msecs_to_jiffies(SBS_CHARGER_POLL_TIME));
}
static irqreturn_t sbs_irq_thread(int irq, void *data)
{
struct sbs_info *chip = data;
int ret;
ret = sbs_check_state(chip);
return ret ? IRQ_HANDLED : IRQ_NONE;
}
static enum power_supply_property sbs_properties[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_HEALTH,
};
static bool sbs_readable_reg(struct device *dev, unsigned int reg)
{
return reg >= SBS_CHARGER_REG_SPEC_INFO;
}
static bool sbs_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case SBS_CHARGER_REG_STATUS:
return true;
}
return false;
}
static const struct regmap_config sbs_regmap = {
.reg_bits = 8,
.val_bits = 16,
.max_register = SBS_CHARGER_REG_ALARM_WARNING,
.readable_reg = sbs_readable_reg,
.volatile_reg = sbs_volatile_reg,
.val_format_endian = REGMAP_ENDIAN_LITTLE, /* since based on SMBus */
};
static const struct power_supply_desc sbs_desc = {
.name = "sbs-charger",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = sbs_properties,
.num_properties = ARRAY_SIZE(sbs_properties),
.get_property = sbs_get_property,
};
static int sbs_probe(struct i2c_client *client)
{
struct power_supply_config psy_cfg = {};
struct sbs_info *chip;
int ret, val;
chip = devm_kzalloc(&client->dev, sizeof(struct sbs_info), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->client = client;
psy_cfg.of_node = client->dev.of_node;
psy_cfg.drv_data = chip;
i2c_set_clientdata(client, chip);
chip->regmap = devm_regmap_init_i2c(client, &sbs_regmap);
if (IS_ERR(chip->regmap))
return PTR_ERR(chip->regmap);
/*
* Before we register, we need to make sure we can actually talk
* to the battery.
*/
ret = regmap_read(chip->regmap, SBS_CHARGER_REG_STATUS, &val);
if (ret)
return dev_err_probe(&client->dev, ret, "Failed to get device status\n");
chip->last_state = val;
chip->power_supply = devm_power_supply_register(&client->dev, &sbs_desc, &psy_cfg);
if (IS_ERR(chip->power_supply))
return dev_err_probe(&client->dev, PTR_ERR(chip->power_supply),
"Failed to register power supply\n");
/*
* The sbs-charger spec doesn't impose the use of an interrupt. So in
* the case it wasn't provided we use polling in order get the charger's
* status.
*/
if (client->irq) {
ret = devm_request_threaded_irq(&client->dev, client->irq,
NULL, sbs_irq_thread,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
dev_name(&client->dev), chip);
if (ret)
return dev_err_probe(&client->dev, ret, "Failed to request irq\n");
} else {
ret = devm_delayed_work_autocancel(&client->dev, &chip->work,
sbs_delayed_work);
if (ret)
return dev_err_probe(&client->dev, ret,
"Failed to init work for polling\n");
schedule_delayed_work(&chip->work,
msecs_to_jiffies(SBS_CHARGER_POLL_TIME));
}
dev_info(&client->dev,
"%s: smart charger device registered\n", client->name);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id sbs_dt_ids[] = {
{ .compatible = "sbs,sbs-charger" },
{ },
};
MODULE_DEVICE_TABLE(of, sbs_dt_ids);
#endif
static const struct i2c_device_id sbs_id[] = {
{ "sbs-charger", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, sbs_id);
static struct i2c_driver sbs_driver = {
.probe = sbs_probe,
.id_table = sbs_id,
.driver = {
.name = "sbs-charger",
.of_match_table = of_match_ptr(sbs_dt_ids),
},
};
module_i2c_driver(sbs_driver);
MODULE_AUTHOR("Nicolas Saenz Julienne <[email protected]>");
MODULE_DESCRIPTION("SBS smart charger driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/power/supply/sbs-charger.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Battery measurement code for WM97xx
*
* based on tosa_battery.c
*
* Copyright (C) 2008 Marek Vasut <[email protected]>
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/wm97xx.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/gpio/consumer.h>
#include <linux/irq.h>
#include <linux/slab.h>
static struct work_struct bat_work;
static struct gpio_desc *charge_gpiod;
static DEFINE_MUTEX(work_lock);
static int bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
static enum power_supply_property *prop;
static unsigned long wm97xx_read_bat(struct power_supply *bat_ps)
{
struct wm97xx_batt_pdata *pdata = power_supply_get_drvdata(bat_ps);
return wm97xx_read_aux_adc(dev_get_drvdata(bat_ps->dev.parent),
pdata->batt_aux) * pdata->batt_mult /
pdata->batt_div;
}
static unsigned long wm97xx_read_temp(struct power_supply *bat_ps)
{
struct wm97xx_batt_pdata *pdata = power_supply_get_drvdata(bat_ps);
return wm97xx_read_aux_adc(dev_get_drvdata(bat_ps->dev.parent),
pdata->temp_aux) * pdata->temp_mult /
pdata->temp_div;
}
static int wm97xx_bat_get_property(struct power_supply *bat_ps,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct wm97xx_batt_pdata *pdata = power_supply_get_drvdata(bat_ps);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
val->intval = bat_status;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = pdata->batt_tech;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
if (pdata->batt_aux >= 0)
val->intval = wm97xx_read_bat(bat_ps);
else
return -EINVAL;
break;
case POWER_SUPPLY_PROP_TEMP:
if (pdata->temp_aux >= 0)
val->intval = wm97xx_read_temp(bat_ps);
else
return -EINVAL;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
if (pdata->max_voltage >= 0)
val->intval = pdata->max_voltage;
else
return -EINVAL;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
if (pdata->min_voltage >= 0)
val->intval = pdata->min_voltage;
else
return -EINVAL;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = 1;
break;
default:
return -EINVAL;
}
return 0;
}
static void wm97xx_bat_external_power_changed(struct power_supply *bat_ps)
{
schedule_work(&bat_work);
}
static void wm97xx_bat_update(struct power_supply *bat_ps)
{
int old_status = bat_status;
mutex_lock(&work_lock);
bat_status = (charge_gpiod) ?
(gpiod_get_value(charge_gpiod) ?
POWER_SUPPLY_STATUS_DISCHARGING :
POWER_SUPPLY_STATUS_CHARGING) :
POWER_SUPPLY_STATUS_UNKNOWN;
if (old_status != bat_status) {
pr_debug("%s: %i -> %i\n", bat_ps->desc->name, old_status,
bat_status);
power_supply_changed(bat_ps);
}
mutex_unlock(&work_lock);
}
static struct power_supply *bat_psy;
static struct power_supply_desc bat_psy_desc = {
.type = POWER_SUPPLY_TYPE_BATTERY,
.get_property = wm97xx_bat_get_property,
.external_power_changed = wm97xx_bat_external_power_changed,
.use_for_apm = 1,
};
static void wm97xx_bat_work(struct work_struct *work)
{
wm97xx_bat_update(bat_psy);
}
static irqreturn_t wm97xx_chrg_irq(int irq, void *data)
{
schedule_work(&bat_work);
return IRQ_HANDLED;
}
#ifdef CONFIG_PM
static int wm97xx_bat_suspend(struct device *dev)
{
flush_work(&bat_work);
return 0;
}
static int wm97xx_bat_resume(struct device *dev)
{
schedule_work(&bat_work);
return 0;
}
static const struct dev_pm_ops wm97xx_bat_pm_ops = {
.suspend = wm97xx_bat_suspend,
.resume = wm97xx_bat_resume,
};
#endif
static int wm97xx_bat_probe(struct platform_device *dev)
{
int ret = 0;
int props = 1; /* POWER_SUPPLY_PROP_PRESENT */
int i = 0;
struct wm97xx_batt_pdata *pdata = dev->dev.platform_data;
struct power_supply_config cfg = {};
if (!pdata) {
dev_err(&dev->dev, "No platform data supplied\n");
return -EINVAL;
}
cfg.drv_data = pdata;
if (dev->id != -1)
return -EINVAL;
charge_gpiod = devm_gpiod_get_optional(&dev->dev, NULL, GPIOD_IN);
if (IS_ERR(charge_gpiod))
return dev_err_probe(&dev->dev,
PTR_ERR(charge_gpiod),
"failed to get charge GPIO\n");
if (charge_gpiod) {
gpiod_set_consumer_name(charge_gpiod, "BATT CHRG");
ret = request_irq(gpiod_to_irq(charge_gpiod),
wm97xx_chrg_irq, 0,
"AC Detect", dev);
if (ret)
return dev_err_probe(&dev->dev, ret,
"failed to request GPIO irq\n");
props++; /* POWER_SUPPLY_PROP_STATUS */
}
if (pdata->batt_tech >= 0)
props++; /* POWER_SUPPLY_PROP_TECHNOLOGY */
if (pdata->temp_aux >= 0)
props++; /* POWER_SUPPLY_PROP_TEMP */
if (pdata->batt_aux >= 0)
props++; /* POWER_SUPPLY_PROP_VOLTAGE_NOW */
if (pdata->max_voltage >= 0)
props++; /* POWER_SUPPLY_PROP_VOLTAGE_MAX */
if (pdata->min_voltage >= 0)
props++; /* POWER_SUPPLY_PROP_VOLTAGE_MIN */
prop = kcalloc(props, sizeof(*prop), GFP_KERNEL);
if (!prop) {
ret = -ENOMEM;
goto err3;
}
prop[i++] = POWER_SUPPLY_PROP_PRESENT;
if (charge_gpiod)
prop[i++] = POWER_SUPPLY_PROP_STATUS;
if (pdata->batt_tech >= 0)
prop[i++] = POWER_SUPPLY_PROP_TECHNOLOGY;
if (pdata->temp_aux >= 0)
prop[i++] = POWER_SUPPLY_PROP_TEMP;
if (pdata->batt_aux >= 0)
prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_NOW;
if (pdata->max_voltage >= 0)
prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_MAX;
if (pdata->min_voltage >= 0)
prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_MIN;
INIT_WORK(&bat_work, wm97xx_bat_work);
if (!pdata->batt_name) {
dev_info(&dev->dev, "Please consider setting proper battery "
"name in platform definition file, falling "
"back to name \"wm97xx-batt\"\n");
bat_psy_desc.name = "wm97xx-batt";
} else
bat_psy_desc.name = pdata->batt_name;
bat_psy_desc.properties = prop;
bat_psy_desc.num_properties = props;
bat_psy = power_supply_register(&dev->dev, &bat_psy_desc, &cfg);
if (!IS_ERR(bat_psy)) {
schedule_work(&bat_work);
} else {
ret = PTR_ERR(bat_psy);
goto err4;
}
return 0;
err4:
kfree(prop);
err3:
if (charge_gpiod)
free_irq(gpiod_to_irq(charge_gpiod), dev);
return ret;
}
static int wm97xx_bat_remove(struct platform_device *dev)
{
if (charge_gpiod)
free_irq(gpiod_to_irq(charge_gpiod), dev);
cancel_work_sync(&bat_work);
power_supply_unregister(bat_psy);
kfree(prop);
return 0;
}
static struct platform_driver wm97xx_bat_driver = {
.driver = {
.name = "wm97xx-battery",
#ifdef CONFIG_PM
.pm = &wm97xx_bat_pm_ops,
#endif
},
.probe = wm97xx_bat_probe,
.remove = wm97xx_bat_remove,
};
module_platform_driver(wm97xx_bat_driver);
MODULE_AUTHOR("Marek Vasut <[email protected]>");
MODULE_DESCRIPTION("WM97xx battery driver");
| linux-master | drivers/power/supply/wm97xx_battery.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) ST-Ericsson SA 2012
*
* Battery temperature driver for AB8500
*
* Author:
* Johan Palsson <[email protected]>
* Karl Komierowski <[email protected]>
* Arun R Murthy <[email protected]>
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/component.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/completion.h>
#include <linux/workqueue.h>
#include <linux/jiffies.h>
#include <linux/of.h>
#include <linux/mfd/core.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/thermal.h>
#include <linux/iio/consumer.h>
#include <linux/fixp-arith.h>
#include "ab8500-bm.h"
#define BTEMP_THERMAL_LOW_LIMIT -10
#define BTEMP_THERMAL_MED_LIMIT 0
#define BTEMP_THERMAL_HIGH_LIMIT_52 52
#define BTEMP_THERMAL_HIGH_LIMIT_57 57
#define BTEMP_THERMAL_HIGH_LIMIT_62 62
#define BTEMP_BATCTRL_CURR_SRC_7UA 7
#define BTEMP_BATCTRL_CURR_SRC_20UA 20
#define BTEMP_BATCTRL_CURR_SRC_16UA 16
#define BTEMP_BATCTRL_CURR_SRC_18UA 18
#define BTEMP_BATCTRL_CURR_SRC_60UA 60
#define BTEMP_BATCTRL_CURR_SRC_120UA 120
/**
* struct ab8500_btemp_interrupts - ab8500 interrupts
* @name: name of the interrupt
* @isr function pointer to the isr
*/
struct ab8500_btemp_interrupts {
char *name;
irqreturn_t (*isr)(int irq, void *data);
};
struct ab8500_btemp_events {
bool batt_rem;
bool btemp_high;
bool btemp_medhigh;
bool btemp_lowmed;
bool btemp_low;
bool ac_conn;
bool usb_conn;
};
struct ab8500_btemp_ranges {
int btemp_high_limit;
int btemp_med_limit;
int btemp_low_limit;
};
/**
* struct ab8500_btemp - ab8500 BTEMP device information
* @dev: Pointer to the structure device
* @node: List of AB8500 BTEMPs, hence prepared for reentrance
* @curr_source: What current source we use, in uA
* @bat_temp: Dispatched battery temperature in degree Celsius
* @prev_bat_temp Last measured battery temperature in degree Celsius
* @parent: Pointer to the struct ab8500
* @tz: Thermal zone for the battery
* @adc_bat_ctrl: ADC channel for the battery control
* @fg: Pointer to the struct fg
* @bm: Platform specific battery management information
* @btemp_psy: Structure for BTEMP specific battery properties
* @events: Structure for information about events triggered
* @btemp_ranges: Battery temperature range structure
* @btemp_wq: Work queue for measuring the temperature periodically
* @btemp_periodic_work: Work for measuring the temperature periodically
* @initialized: True if battery id read.
*/
struct ab8500_btemp {
struct device *dev;
struct list_head node;
int curr_source;
int bat_temp;
int prev_bat_temp;
struct ab8500 *parent;
struct thermal_zone_device *tz;
struct iio_channel *bat_ctrl;
struct ab8500_fg *fg;
struct ab8500_bm_data *bm;
struct power_supply *btemp_psy;
struct ab8500_btemp_events events;
struct ab8500_btemp_ranges btemp_ranges;
struct workqueue_struct *btemp_wq;
struct delayed_work btemp_periodic_work;
bool initialized;
};
/* BTEMP power supply properties */
static enum power_supply_property ab8500_btemp_props[] = {
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_TEMP,
};
static LIST_HEAD(ab8500_btemp_list);
/**
* ab8500_btemp_batctrl_volt_to_res() - convert batctrl voltage to resistance
* @di: pointer to the ab8500_btemp structure
* @v_batctrl: measured batctrl voltage
* @inst_curr: measured instant current
*
* This function returns the battery resistance that is
* derived from the BATCTRL voltage.
* Returns value in Ohms.
*/
static int ab8500_btemp_batctrl_volt_to_res(struct ab8500_btemp *di,
int v_batctrl, int inst_curr)
{
if (is_ab8500_1p1_or_earlier(di->parent)) {
/*
* For ABB cut1.0 and 1.1 BAT_CTRL is internally
* connected to 1.8V through a 450k resistor
*/
return (450000 * (v_batctrl)) / (1800 - v_batctrl);
}
/*
* BAT_CTRL is internally
* connected to 1.8V through a 80k resistor
*/
return (80000 * (v_batctrl)) / (1800 - v_batctrl);
}
/**
* ab8500_btemp_read_batctrl_voltage() - measure batctrl voltage
* @di: pointer to the ab8500_btemp structure
*
* This function returns the voltage on BATCTRL. Returns value in mV.
*/
static int ab8500_btemp_read_batctrl_voltage(struct ab8500_btemp *di)
{
int vbtemp, ret;
static int prev;
ret = iio_read_channel_processed(di->bat_ctrl, &vbtemp);
if (ret < 0) {
dev_err(di->dev,
"%s ADC conversion failed, using previous value",
__func__);
return prev;
}
prev = vbtemp;
return vbtemp;
}
/**
* ab8500_btemp_get_batctrl_res() - get battery resistance
* @di: pointer to the ab8500_btemp structure
*
* This function returns the battery pack identification resistance.
* Returns value in Ohms.
*/
static int ab8500_btemp_get_batctrl_res(struct ab8500_btemp *di)
{
int ret;
int batctrl = 0;
int res;
int inst_curr;
int i;
if (!di->fg)
di->fg = ab8500_fg_get();
if (!di->fg) {
dev_err(di->dev, "No fg found\n");
return -EINVAL;
}
ret = ab8500_fg_inst_curr_start(di->fg);
if (ret) {
dev_err(di->dev, "Failed to start current measurement\n");
return ret;
}
do {
msleep(20);
} while (!ab8500_fg_inst_curr_started(di->fg));
i = 0;
do {
batctrl += ab8500_btemp_read_batctrl_voltage(di);
i++;
msleep(20);
} while (!ab8500_fg_inst_curr_done(di->fg));
batctrl /= i;
ret = ab8500_fg_inst_curr_finalize(di->fg, &inst_curr);
if (ret) {
dev_err(di->dev, "Failed to finalize current measurement\n");
return ret;
}
res = ab8500_btemp_batctrl_volt_to_res(di, batctrl, inst_curr);
dev_dbg(di->dev, "%s batctrl: %d res: %d inst_curr: %d samples: %d\n",
__func__, batctrl, res, inst_curr, i);
return res;
}
/**
* ab8500_btemp_id() - Identify the connected battery
* @di: pointer to the ab8500_btemp structure
*
* This function will try to identify the battery by reading the ID
* resistor. Some brands use a combined ID resistor with a NTC resistor to
* both be able to identify and to read the temperature of it.
*/
static int ab8500_btemp_id(struct ab8500_btemp *di)
{
struct power_supply_battery_info *bi = di->bm->bi;
int res;
di->curr_source = BTEMP_BATCTRL_CURR_SRC_7UA;
res = ab8500_btemp_get_batctrl_res(di);
if (res < 0) {
dev_err(di->dev, "%s get batctrl res failed\n", __func__);
return -ENXIO;
}
if (power_supply_battery_bti_in_range(bi, res)) {
dev_info(di->dev, "Battery detected on BATCTRL (pin C3)"
" resistance %d Ohm = %d Ohm +/- %d%%\n",
res, bi->bti_resistance_ohm,
bi->bti_resistance_tolerance);
} else {
dev_warn(di->dev, "Battery identified as unknown"
", resistance %d Ohm\n", res);
return -ENXIO;
}
return 0;
}
/**
* ab8500_btemp_periodic_work() - Measuring the temperature periodically
* @work: pointer to the work_struct structure
*
* Work function for measuring the temperature periodically
*/
static void ab8500_btemp_periodic_work(struct work_struct *work)
{
int interval;
int bat_temp;
struct ab8500_btemp *di = container_of(work,
struct ab8500_btemp, btemp_periodic_work.work);
/* Assume 25 degrees celsius as start temperature */
static int prev = 25;
int ret;
if (!di->initialized) {
/* Identify the battery */
if (ab8500_btemp_id(di) < 0)
dev_warn(di->dev, "failed to identify the battery\n");
}
/* Failover if a reading is erroneous, use last meausurement */
ret = thermal_zone_get_temp(di->tz, &bat_temp);
if (ret) {
dev_err(di->dev, "error reading temperature\n");
bat_temp = prev;
} else {
/* Convert from millicentigrades to centigrades */
bat_temp /= 1000;
prev = bat_temp;
}
/*
* Filter battery temperature.
* Allow direct updates on temperature only if two samples result in
* same temperature. Else only allow 1 degree change from previous
* reported value in the direction of the new measurement.
*/
if ((bat_temp == di->prev_bat_temp) || !di->initialized) {
if ((di->bat_temp != di->prev_bat_temp) || !di->initialized) {
di->initialized = true;
di->bat_temp = bat_temp;
power_supply_changed(di->btemp_psy);
}
} else if (bat_temp < di->prev_bat_temp) {
di->bat_temp--;
power_supply_changed(di->btemp_psy);
} else if (bat_temp > di->prev_bat_temp) {
di->bat_temp++;
power_supply_changed(di->btemp_psy);
}
di->prev_bat_temp = bat_temp;
if (di->events.ac_conn || di->events.usb_conn)
interval = di->bm->temp_interval_chg;
else
interval = di->bm->temp_interval_nochg;
/* Schedule a new measurement */
queue_delayed_work(di->btemp_wq,
&di->btemp_periodic_work,
round_jiffies(interval * HZ));
}
/**
* ab8500_btemp_batctrlindb_handler() - battery removal detected
* @irq: interrupt number
* @_di: void pointer that has to address of ab8500_btemp
*
* Returns IRQ status(IRQ_HANDLED)
*/
static irqreturn_t ab8500_btemp_batctrlindb_handler(int irq, void *_di)
{
struct ab8500_btemp *di = _di;
dev_err(di->dev, "Battery removal detected!\n");
di->events.batt_rem = true;
power_supply_changed(di->btemp_psy);
return IRQ_HANDLED;
}
/**
* ab8500_btemp_templow_handler() - battery temp lower than 10 degrees
* @irq: interrupt number
* @_di: void pointer that has to address of ab8500_btemp
*
* Returns IRQ status(IRQ_HANDLED)
*/
static irqreturn_t ab8500_btemp_templow_handler(int irq, void *_di)
{
struct ab8500_btemp *di = _di;
if (is_ab8500_3p3_or_earlier(di->parent)) {
dev_dbg(di->dev, "Ignore false btemp low irq"
" for ABB cut 1.0, 1.1, 2.0 and 3.3\n");
} else {
dev_crit(di->dev, "Battery temperature lower than -10deg c\n");
di->events.btemp_low = true;
di->events.btemp_high = false;
di->events.btemp_medhigh = false;
di->events.btemp_lowmed = false;
power_supply_changed(di->btemp_psy);
}
return IRQ_HANDLED;
}
/**
* ab8500_btemp_temphigh_handler() - battery temp higher than max temp
* @irq: interrupt number
* @_di: void pointer that has to address of ab8500_btemp
*
* Returns IRQ status(IRQ_HANDLED)
*/
static irqreturn_t ab8500_btemp_temphigh_handler(int irq, void *_di)
{
struct ab8500_btemp *di = _di;
dev_crit(di->dev, "Battery temperature is higher than MAX temp\n");
di->events.btemp_high = true;
di->events.btemp_medhigh = false;
di->events.btemp_lowmed = false;
di->events.btemp_low = false;
power_supply_changed(di->btemp_psy);
return IRQ_HANDLED;
}
/**
* ab8500_btemp_lowmed_handler() - battery temp between low and medium
* @irq: interrupt number
* @_di: void pointer that has to address of ab8500_btemp
*
* Returns IRQ status(IRQ_HANDLED)
*/
static irqreturn_t ab8500_btemp_lowmed_handler(int irq, void *_di)
{
struct ab8500_btemp *di = _di;
dev_dbg(di->dev, "Battery temperature is between low and medium\n");
di->events.btemp_lowmed = true;
di->events.btemp_medhigh = false;
di->events.btemp_high = false;
di->events.btemp_low = false;
power_supply_changed(di->btemp_psy);
return IRQ_HANDLED;
}
/**
* ab8500_btemp_medhigh_handler() - battery temp between medium and high
* @irq: interrupt number
* @_di: void pointer that has to address of ab8500_btemp
*
* Returns IRQ status(IRQ_HANDLED)
*/
static irqreturn_t ab8500_btemp_medhigh_handler(int irq, void *_di)
{
struct ab8500_btemp *di = _di;
dev_dbg(di->dev, "Battery temperature is between medium and high\n");
di->events.btemp_medhigh = true;
di->events.btemp_lowmed = false;
di->events.btemp_high = false;
di->events.btemp_low = false;
power_supply_changed(di->btemp_psy);
return IRQ_HANDLED;
}
/**
* ab8500_btemp_periodic() - Periodic temperature measurements
* @di: pointer to the ab8500_btemp structure
* @enable: enable or disable periodic temperature measurements
*
* Starts of stops periodic temperature measurements. Periodic measurements
* should only be done when a charger is connected.
*/
static void ab8500_btemp_periodic(struct ab8500_btemp *di,
bool enable)
{
dev_dbg(di->dev, "Enable periodic temperature measurements: %d\n",
enable);
/*
* Make sure a new measurement is done directly by cancelling
* any pending work
*/
cancel_delayed_work_sync(&di->btemp_periodic_work);
if (enable)
queue_delayed_work(di->btemp_wq, &di->btemp_periodic_work, 0);
}
/**
* ab8500_btemp_get_temp() - get battery temperature
* @di: pointer to the ab8500_btemp structure
*
* Returns battery temperature
*/
static int ab8500_btemp_get_temp(struct ab8500_btemp *di)
{
int temp = 0;
/*
* The BTEMP events are not reliabe on AB8500 cut3.3
* and prior versions
*/
if (is_ab8500_3p3_or_earlier(di->parent)) {
temp = di->bat_temp * 10;
} else {
if (di->events.btemp_low) {
if (temp > di->btemp_ranges.btemp_low_limit)
temp = di->btemp_ranges.btemp_low_limit * 10;
else
temp = di->bat_temp * 10;
} else if (di->events.btemp_high) {
if (temp < di->btemp_ranges.btemp_high_limit)
temp = di->btemp_ranges.btemp_high_limit * 10;
else
temp = di->bat_temp * 10;
} else if (di->events.btemp_lowmed) {
if (temp > di->btemp_ranges.btemp_med_limit)
temp = di->btemp_ranges.btemp_med_limit * 10;
else
temp = di->bat_temp * 10;
} else if (di->events.btemp_medhigh) {
if (temp < di->btemp_ranges.btemp_med_limit)
temp = di->btemp_ranges.btemp_med_limit * 10;
else
temp = di->bat_temp * 10;
} else
temp = di->bat_temp * 10;
}
return temp;
}
/**
* ab8500_btemp_get_property() - get the btemp properties
* @psy: pointer to the power_supply structure
* @psp: pointer to the power_supply_property structure
* @val: pointer to the power_supply_propval union
*
* This function gets called when an application tries to get the btemp
* properties by reading the sysfs files.
* online: presence of the battery
* present: presence of the battery
* technology: battery technology
* temp: battery temperature
* Returns error code in case of failure else 0(on success)
*/
static int ab8500_btemp_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct ab8500_btemp *di = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_PRESENT:
case POWER_SUPPLY_PROP_ONLINE:
if (di->events.batt_rem)
val->intval = 0;
else
val->intval = 1;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
if (di->bm->bi)
val->intval = di->bm->bi->technology;
else
val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
break;
case POWER_SUPPLY_PROP_TEMP:
val->intval = ab8500_btemp_get_temp(di);
break;
default:
return -EINVAL;
}
return 0;
}
static int ab8500_btemp_get_ext_psy_data(struct device *dev, void *data)
{
struct power_supply *psy;
struct power_supply *ext = dev_get_drvdata(dev);
const char **supplicants = (const char **)ext->supplied_to;
struct ab8500_btemp *di;
union power_supply_propval ret;
int j;
psy = (struct power_supply *)data;
di = power_supply_get_drvdata(psy);
/*
* For all psy where the name of your driver
* appears in any supplied_to
*/
j = match_string(supplicants, ext->num_supplicants, psy->desc->name);
if (j < 0)
return 0;
/* Go through all properties for the psy */
for (j = 0; j < ext->desc->num_properties; j++) {
enum power_supply_property prop;
prop = ext->desc->properties[j];
if (power_supply_get_property(ext, prop, &ret))
continue;
switch (prop) {
case POWER_SUPPLY_PROP_PRESENT:
switch (ext->desc->type) {
case POWER_SUPPLY_TYPE_MAINS:
/* AC disconnected */
if (!ret.intval && di->events.ac_conn) {
di->events.ac_conn = false;
}
/* AC connected */
else if (ret.intval && !di->events.ac_conn) {
di->events.ac_conn = true;
if (!di->events.usb_conn)
ab8500_btemp_periodic(di, true);
}
break;
case POWER_SUPPLY_TYPE_USB:
/* USB disconnected */
if (!ret.intval && di->events.usb_conn) {
di->events.usb_conn = false;
}
/* USB connected */
else if (ret.intval && !di->events.usb_conn) {
di->events.usb_conn = true;
if (!di->events.ac_conn)
ab8500_btemp_periodic(di, true);
}
break;
default:
break;
}
break;
default:
break;
}
}
return 0;
}
/**
* ab8500_btemp_external_power_changed() - callback for power supply changes
* @psy: pointer to the structure power_supply
*
* This function is pointing to the function pointer external_power_changed
* of the structure power_supply.
* This function gets executed when there is a change in the external power
* supply to the btemp.
*/
static void ab8500_btemp_external_power_changed(struct power_supply *psy)
{
class_for_each_device(power_supply_class, NULL, psy,
ab8500_btemp_get_ext_psy_data);
}
/* ab8500 btemp driver interrupts and their respective isr */
static struct ab8500_btemp_interrupts ab8500_btemp_irq[] = {
{"BAT_CTRL_INDB", ab8500_btemp_batctrlindb_handler},
{"BTEMP_LOW", ab8500_btemp_templow_handler},
{"BTEMP_HIGH", ab8500_btemp_temphigh_handler},
{"BTEMP_LOW_MEDIUM", ab8500_btemp_lowmed_handler},
{"BTEMP_MEDIUM_HIGH", ab8500_btemp_medhigh_handler},
};
static int __maybe_unused ab8500_btemp_resume(struct device *dev)
{
struct ab8500_btemp *di = dev_get_drvdata(dev);
ab8500_btemp_periodic(di, true);
return 0;
}
static int __maybe_unused ab8500_btemp_suspend(struct device *dev)
{
struct ab8500_btemp *di = dev_get_drvdata(dev);
ab8500_btemp_periodic(di, false);
return 0;
}
static char *supply_interface[] = {
"ab8500_chargalg",
"ab8500_fg",
};
static const struct power_supply_desc ab8500_btemp_desc = {
.name = "ab8500_btemp",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = ab8500_btemp_props,
.num_properties = ARRAY_SIZE(ab8500_btemp_props),
.get_property = ab8500_btemp_get_property,
.external_power_changed = ab8500_btemp_external_power_changed,
};
static int ab8500_btemp_bind(struct device *dev, struct device *master,
void *data)
{
struct ab8500_btemp *di = dev_get_drvdata(dev);
/* Create a work queue for the btemp */
di->btemp_wq =
alloc_workqueue("ab8500_btemp_wq", WQ_MEM_RECLAIM, 0);
if (di->btemp_wq == NULL) {
dev_err(dev, "failed to create work queue\n");
return -ENOMEM;
}
/* Kick off periodic temperature measurements */
ab8500_btemp_periodic(di, true);
return 0;
}
static void ab8500_btemp_unbind(struct device *dev, struct device *master,
void *data)
{
struct ab8500_btemp *di = dev_get_drvdata(dev);
/* Delete the work queue */
destroy_workqueue(di->btemp_wq);
}
static const struct component_ops ab8500_btemp_component_ops = {
.bind = ab8500_btemp_bind,
.unbind = ab8500_btemp_unbind,
};
static int ab8500_btemp_probe(struct platform_device *pdev)
{
struct power_supply_config psy_cfg = {};
struct device *dev = &pdev->dev;
struct ab8500_btemp *di;
int irq, i, ret = 0;
u8 val;
di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
if (!di)
return -ENOMEM;
di->bm = &ab8500_bm_data;
/* get parent data */
di->dev = dev;
di->parent = dev_get_drvdata(pdev->dev.parent);
/* Get thermal zone and ADC */
di->tz = thermal_zone_get_zone_by_name("battery-thermal");
if (IS_ERR(di->tz)) {
ret = PTR_ERR(di->tz);
/*
* This usually just means we are probing before the thermal
* zone, so just defer.
*/
if (ret == -ENODEV)
ret = -EPROBE_DEFER;
return dev_err_probe(dev, ret,
"failed to get battery thermal zone\n");
}
di->bat_ctrl = devm_iio_channel_get(dev, "bat_ctrl");
if (IS_ERR(di->bat_ctrl)) {
ret = dev_err_probe(dev, PTR_ERR(di->bat_ctrl),
"failed to get BAT CTRL ADC channel\n");
return ret;
}
di->initialized = false;
psy_cfg.supplied_to = supply_interface;
psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
psy_cfg.drv_data = di;
/* Init work for measuring temperature periodically */
INIT_DEFERRABLE_WORK(&di->btemp_periodic_work,
ab8500_btemp_periodic_work);
/* Set BTEMP thermal limits. Low and Med are fixed */
di->btemp_ranges.btemp_low_limit = BTEMP_THERMAL_LOW_LIMIT;
di->btemp_ranges.btemp_med_limit = BTEMP_THERMAL_MED_LIMIT;
ret = abx500_get_register_interruptible(dev, AB8500_CHARGER,
AB8500_BTEMP_HIGH_TH, &val);
if (ret < 0) {
dev_err(dev, "%s ab8500 read failed\n", __func__);
return ret;
}
switch (val) {
case BTEMP_HIGH_TH_57_0:
case BTEMP_HIGH_TH_57_1:
di->btemp_ranges.btemp_high_limit =
BTEMP_THERMAL_HIGH_LIMIT_57;
break;
case BTEMP_HIGH_TH_52:
di->btemp_ranges.btemp_high_limit =
BTEMP_THERMAL_HIGH_LIMIT_52;
break;
case BTEMP_HIGH_TH_62:
di->btemp_ranges.btemp_high_limit =
BTEMP_THERMAL_HIGH_LIMIT_62;
break;
}
/* Register BTEMP power supply class */
di->btemp_psy = devm_power_supply_register(dev, &ab8500_btemp_desc,
&psy_cfg);
if (IS_ERR(di->btemp_psy)) {
dev_err(dev, "failed to register BTEMP psy\n");
return PTR_ERR(di->btemp_psy);
}
/* Register interrupts */
for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) {
irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name);
if (irq < 0)
return irq;
ret = devm_request_threaded_irq(dev, irq, NULL,
ab8500_btemp_irq[i].isr,
IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT,
ab8500_btemp_irq[i].name, di);
if (ret) {
dev_err(dev, "failed to request %s IRQ %d: %d\n"
, ab8500_btemp_irq[i].name, irq, ret);
return ret;
}
dev_dbg(dev, "Requested %s IRQ %d: %d\n",
ab8500_btemp_irq[i].name, irq, ret);
}
platform_set_drvdata(pdev, di);
list_add_tail(&di->node, &ab8500_btemp_list);
return component_add(dev, &ab8500_btemp_component_ops);
}
static int ab8500_btemp_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &ab8500_btemp_component_ops);
return 0;
}
static SIMPLE_DEV_PM_OPS(ab8500_btemp_pm_ops, ab8500_btemp_suspend, ab8500_btemp_resume);
static const struct of_device_id ab8500_btemp_match[] = {
{ .compatible = "stericsson,ab8500-btemp", },
{ },
};
MODULE_DEVICE_TABLE(of, ab8500_btemp_match);
struct platform_driver ab8500_btemp_driver = {
.probe = ab8500_btemp_probe,
.remove = ab8500_btemp_remove,
.driver = {
.name = "ab8500-btemp",
.of_match_table = ab8500_btemp_match,
.pm = &ab8500_btemp_pm_ops,
},
};
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy");
MODULE_ALIAS("platform:ab8500-btemp");
MODULE_DESCRIPTION("AB8500 battery temperature driver");
| linux-master | drivers/power/supply/ab8500_btemp.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* ROHM BD99954 charger driver
*
* Copyright (C) 2020 Rohm Semiconductors
* Originally written by:
* Mikko Mutanen <[email protected]>
* Markus Laine <[email protected]>
* Bugs added by:
* Matti Vaittinen <[email protected]>
*/
/*
* The battery charging profile of BD99954.
*
* Curve (1) represents charging current.
* Curve (2) represents battery voltage.
*
* The BD99954 data sheet divides charging to three phases.
* a) Trickle-charge with constant current (8).
* b) pre-charge with constant current (6)
* c) fast-charge, first with constant current (5) phase. After
* the battery voltage has reached target level (4) we have constant
* voltage phase until charging current has dropped to termination
* level (7)
*
* V ^ ^ I
* . .
* . .
*(4)` `.` ` ` ` ` ` ` ` ` ` ` ` ` ` ----------------------------.
* . :/ .
* . o----+/:/ ` ` ` ` ` ` ` ` ` ` ` ` `.` ` (5)
* . + :: + .
* . + /- -- .
* . +`/- + .
* . o/- -: .
* . .s. +` .
* . .--+ `/ .
* . ..`` + .: .
* . -` + -- .
* . (2) ...`` + :- .
* . ...`` + -: .
*(3)` `.`."" ` ` ` `+-------- ` ` ` ` ` ` `.:` ` ` ` ` ` ` ` ` .` ` (6)
* . + `:. .
* . + -: .
* . + -:. .
* . + .--. .
* . (1) + `.+` ` ` `.` ` (7)
* -..............` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` + ` ` ` .` ` (8)
* . + -
* -------------------------------------------------+++++++++-->
* | trickle | pre | fast |
*
* Details of DT properties for different limits can be found from BD99954
* device tree binding documentation.
*/
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/linear_range.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/power_supply.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/types.h>
#include "bd99954-charger.h"
struct battery_data {
u16 precharge_current; /* Trickle-charge Current */
u16 fc_reg_voltage; /* Fast Charging Regulation Voltage */
u16 voltage_min;
u16 voltage_max;
};
/* Initial field values, converted to initial register values */
struct bd9995x_init_data {
u16 vsysreg_set; /* VSYS Regulation Setting */
u16 ibus_lim_set; /* VBUS input current limitation */
u16 icc_lim_set; /* VCC/VACP Input Current Limit Setting */
u16 itrich_set; /* Trickle-charge Current Setting */
u16 iprech_set; /* Pre-Charge Current Setting */
u16 ichg_set; /* Fast-Charge constant current */
u16 vfastchg_reg_set1; /* Fast Charging Regulation Voltage */
u16 vprechg_th_set; /* Pre-charge Voltage Threshold Setting */
u16 vrechg_set; /* Re-charge Battery Voltage Setting */
u16 vbatovp_set; /* Battery Over Voltage Threshold Setting */
u16 iterm_set; /* Charging termination current */
};
struct bd9995x_state {
u8 online;
u16 chgstm_status;
u16 vbat_vsys_status;
u16 vbus_vcc_status;
};
struct bd9995x_device {
struct i2c_client *client;
struct device *dev;
struct power_supply *charger;
struct regmap *rmap;
struct regmap_field *rmap_fields[F_MAX_FIELDS];
int chip_id;
int chip_rev;
struct bd9995x_init_data init_data;
struct bd9995x_state state;
struct mutex lock; /* Protect state data */
};
static const struct regmap_range bd9995x_readonly_reg_ranges[] = {
regmap_reg_range(CHGSTM_STATUS, SEL_ILIM_VAL),
regmap_reg_range(IOUT_DACIN_VAL, IOUT_DACIN_VAL),
regmap_reg_range(VCC_UCD_STATUS, VCC_IDD_STATUS),
regmap_reg_range(VBUS_UCD_STATUS, VBUS_IDD_STATUS),
regmap_reg_range(CHIP_ID, CHIP_REV),
regmap_reg_range(SYSTEM_STATUS, SYSTEM_STATUS),
regmap_reg_range(IBATP_VAL, VBAT_AVE_VAL),
regmap_reg_range(VTH_VAL, EXTIADP_AVE_VAL),
};
static const struct regmap_access_table bd9995x_writeable_regs = {
.no_ranges = bd9995x_readonly_reg_ranges,
.n_no_ranges = ARRAY_SIZE(bd9995x_readonly_reg_ranges),
};
static const struct regmap_range bd9995x_volatile_reg_ranges[] = {
regmap_reg_range(CHGSTM_STATUS, WDT_STATUS),
regmap_reg_range(VCC_UCD_STATUS, VCC_IDD_STATUS),
regmap_reg_range(VBUS_UCD_STATUS, VBUS_IDD_STATUS),
regmap_reg_range(INT0_STATUS, INT7_STATUS),
regmap_reg_range(SYSTEM_STATUS, SYSTEM_CTRL_SET),
regmap_reg_range(IBATP_VAL, EXTIADP_AVE_VAL), /* Measurement regs */
};
static const struct regmap_access_table bd9995x_volatile_regs = {
.yes_ranges = bd9995x_volatile_reg_ranges,
.n_yes_ranges = ARRAY_SIZE(bd9995x_volatile_reg_ranges),
};
static const struct regmap_range_cfg regmap_range_cfg[] = {
{
.selector_reg = MAP_SET,
.selector_mask = 0xFFFF,
.selector_shift = 0,
.window_start = 0,
.window_len = 0x100,
.range_min = 0 * 0x100,
.range_max = 3 * 0x100,
},
};
static const struct regmap_config bd9995x_regmap_config = {
.reg_bits = 8,
.val_bits = 16,
.reg_stride = 1,
.max_register = 3 * 0x100,
.cache_type = REGCACHE_RBTREE,
.ranges = regmap_range_cfg,
.num_ranges = ARRAY_SIZE(regmap_range_cfg),
.val_format_endian = REGMAP_ENDIAN_LITTLE,
.wr_table = &bd9995x_writeable_regs,
.volatile_table = &bd9995x_volatile_regs,
};
enum bd9995x_chrg_fault {
CHRG_FAULT_NORMAL,
CHRG_FAULT_INPUT,
CHRG_FAULT_THERMAL_SHUTDOWN,
CHRG_FAULT_TIMER_EXPIRED,
};
static int bd9995x_get_prop_batt_health(struct bd9995x_device *bd)
{
int ret, tmp;
ret = regmap_field_read(bd->rmap_fields[F_BATTEMP], &tmp);
if (ret)
return POWER_SUPPLY_HEALTH_UNKNOWN;
/* TODO: Check these against datasheet page 34 */
switch (tmp) {
case ROOM:
return POWER_SUPPLY_HEALTH_GOOD;
case HOT1:
case HOT2:
case HOT3:
return POWER_SUPPLY_HEALTH_OVERHEAT;
case COLD1:
case COLD2:
return POWER_SUPPLY_HEALTH_COLD;
case TEMP_DIS:
case BATT_OPEN:
default:
return POWER_SUPPLY_HEALTH_UNKNOWN;
}
}
static int bd9995x_get_prop_charge_type(struct bd9995x_device *bd)
{
int ret, tmp;
ret = regmap_field_read(bd->rmap_fields[F_CHGSTM_STATE], &tmp);
if (ret)
return POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
switch (tmp) {
case CHGSTM_TRICKLE_CHARGE:
case CHGSTM_PRE_CHARGE:
return POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
case CHGSTM_FAST_CHARGE:
return POWER_SUPPLY_CHARGE_TYPE_FAST;
case CHGSTM_TOP_OFF:
case CHGSTM_DONE:
case CHGSTM_SUSPEND:
return POWER_SUPPLY_CHARGE_TYPE_NONE;
default: /* Rest of the states are error related, no charging */
return POWER_SUPPLY_CHARGE_TYPE_NONE;
}
}
static bool bd9995x_get_prop_batt_present(struct bd9995x_device *bd)
{
int ret, tmp;
ret = regmap_field_read(bd->rmap_fields[F_BATTEMP], &tmp);
if (ret)
return false;
return tmp != BATT_OPEN;
}
static int bd9995x_get_prop_batt_voltage(struct bd9995x_device *bd)
{
int ret, tmp;
ret = regmap_field_read(bd->rmap_fields[F_VBAT_VAL], &tmp);
if (ret)
return 0;
tmp = min(tmp, 19200);
return tmp * 1000;
}
static int bd9995x_get_prop_batt_current(struct bd9995x_device *bd)
{
int ret, tmp;
ret = regmap_field_read(bd->rmap_fields[F_IBATP_VAL], &tmp);
if (ret)
return 0;
return tmp * 1000;
}
#define DEFAULT_BATTERY_TEMPERATURE 250
static int bd9995x_get_prop_batt_temp(struct bd9995x_device *bd)
{
int ret, tmp;
ret = regmap_field_read(bd->rmap_fields[F_THERM_VAL], &tmp);
if (ret)
return DEFAULT_BATTERY_TEMPERATURE;
return (200 - tmp) * 10;
}
static int bd9995x_power_supply_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
int ret, tmp;
struct bd9995x_device *bd = power_supply_get_drvdata(psy);
struct bd9995x_state state;
mutex_lock(&bd->lock);
state = bd->state;
mutex_unlock(&bd->lock);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
switch (state.chgstm_status) {
case CHGSTM_TRICKLE_CHARGE:
case CHGSTM_PRE_CHARGE:
case CHGSTM_FAST_CHARGE:
case CHGSTM_TOP_OFF:
val->intval = POWER_SUPPLY_STATUS_CHARGING;
break;
case CHGSTM_DONE:
val->intval = POWER_SUPPLY_STATUS_FULL;
break;
case CHGSTM_SUSPEND:
case CHGSTM_TEMPERATURE_ERROR_1:
case CHGSTM_TEMPERATURE_ERROR_2:
case CHGSTM_TEMPERATURE_ERROR_3:
case CHGSTM_TEMPERATURE_ERROR_4:
case CHGSTM_TEMPERATURE_ERROR_5:
case CHGSTM_TEMPERATURE_ERROR_6:
case CHGSTM_TEMPERATURE_ERROR_7:
case CHGSTM_THERMAL_SHUT_DOWN_1:
case CHGSTM_THERMAL_SHUT_DOWN_2:
case CHGSTM_THERMAL_SHUT_DOWN_3:
case CHGSTM_THERMAL_SHUT_DOWN_4:
case CHGSTM_THERMAL_SHUT_DOWN_5:
case CHGSTM_THERMAL_SHUT_DOWN_6:
case CHGSTM_THERMAL_SHUT_DOWN_7:
case CHGSTM_BATTERY_ERROR:
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
default:
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
break;
}
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = BD9995X_MANUFACTURER;
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = state.online;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = regmap_field_read(bd->rmap_fields[F_IBATP_VAL], &tmp);
if (ret)
return ret;
val->intval = tmp * 1000;
break;
case POWER_SUPPLY_PROP_CHARGE_AVG:
ret = regmap_field_read(bd->rmap_fields[F_IBATP_AVE_VAL], &tmp);
if (ret)
return ret;
val->intval = tmp * 1000;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
/*
* Currently the DT uses this property to give the
* target current for fast-charging constant current phase.
* I think it is correct in a sense.
*
* Yet, this prop we read and return here is the programmed
* safety limit for combined input currents. This feels
* also correct in a sense.
*
* However, this results a mismatch to DT value and value
* read from sysfs.
*/
ret = regmap_field_read(bd->rmap_fields[F_SEL_ILIM_VAL], &tmp);
if (ret)
return ret;
val->intval = tmp * 1000;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
if (!state.online) {
val->intval = 0;
break;
}
ret = regmap_field_read(bd->rmap_fields[F_VFASTCHG_REG_SET1],
&tmp);
if (ret)
return ret;
/*
* The actual range : 2560 to 19200 mV. No matter what the
* register says
*/
val->intval = clamp_val(tmp << 4, 2560, 19200);
val->intval *= 1000;
break;
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
ret = regmap_field_read(bd->rmap_fields[F_ITERM_SET], &tmp);
if (ret)
return ret;
/* Start step is 64 mA */
val->intval = tmp << 6;
/* Maximum is 1024 mA - no matter what register says */
val->intval = min(val->intval, 1024);
val->intval *= 1000;
break;
/* Battery properties which we access through charger */
case POWER_SUPPLY_PROP_PRESENT:
val->intval = bd9995x_get_prop_batt_present(bd);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = bd9995x_get_prop_batt_voltage(bd);
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
val->intval = bd9995x_get_prop_batt_current(bd);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
val->intval = bd9995x_get_prop_charge_type(bd);
break;
case POWER_SUPPLY_PROP_HEALTH:
val->intval = bd9995x_get_prop_batt_health(bd);
break;
case POWER_SUPPLY_PROP_TEMP:
val->intval = bd9995x_get_prop_batt_temp(bd);
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = "bd99954";
break;
default:
return -EINVAL;
}
return 0;
}
static int bd9995x_get_chip_state(struct bd9995x_device *bd,
struct bd9995x_state *state)
{
int i, ret, tmp;
struct {
struct regmap_field *id;
u16 *data;
} state_fields[] = {
{
bd->rmap_fields[F_CHGSTM_STATE], &state->chgstm_status,
}, {
bd->rmap_fields[F_VBAT_VSYS_STATUS],
&state->vbat_vsys_status,
}, {
bd->rmap_fields[F_VBUS_VCC_STATUS],
&state->vbus_vcc_status,
},
};
for (i = 0; i < ARRAY_SIZE(state_fields); i++) {
ret = regmap_field_read(state_fields[i].id, &tmp);
if (ret)
return ret;
*state_fields[i].data = tmp;
}
if (state->vbus_vcc_status & STATUS_VCC_DET ||
state->vbus_vcc_status & STATUS_VBUS_DET)
state->online = 1;
else
state->online = 0;
return 0;
}
static irqreturn_t bd9995x_irq_handler_thread(int irq, void *private)
{
struct bd9995x_device *bd = private;
int ret, status, mask, i;
unsigned long tmp;
struct bd9995x_state state;
/*
* The bd9995x does not seem to generate big amount of interrupts.
* The logic regarding which interrupts can cause relevant
* status changes seem to be pretty complex.
*
* So lets implement really simple and hopefully bullet-proof handler:
* It does not really matter which IRQ we handle, we just go and
* re-read all interesting statuses + give the framework a nudge.
*
* Other option would be building a _complex_ and error prone logic
* trying to decide what could have been changed (resulting this IRQ
* we are now handling). During the normal operation the BD99954 does
* not seem to be generating much of interrupts so benefit from such
* logic would probably be minimal.
*/
ret = regmap_read(bd->rmap, INT0_STATUS, &status);
if (ret) {
dev_err(bd->dev, "Failed to read IRQ status\n");
return IRQ_NONE;
}
ret = regmap_field_read(bd->rmap_fields[F_INT0_SET], &mask);
if (ret) {
dev_err(bd->dev, "Failed to read IRQ mask\n");
return IRQ_NONE;
}
/* Handle only IRQs that are not masked */
status &= mask;
tmp = status;
/* Lowest bit does not represent any sub-registers */
tmp >>= 1;
/*
* Mask and ack IRQs we will handle (+ the idiot bit)
*/
ret = regmap_field_write(bd->rmap_fields[F_INT0_SET], 0);
if (ret) {
dev_err(bd->dev, "Failed to mask F_INT0\n");
return IRQ_NONE;
}
ret = regmap_write(bd->rmap, INT0_STATUS, status);
if (ret) {
dev_err(bd->dev, "Failed to ack F_INT0\n");
goto err_umask;
}
for_each_set_bit(i, &tmp, 7) {
int sub_status, sub_mask;
static const int sub_status_reg[] = {
INT1_STATUS, INT2_STATUS, INT3_STATUS, INT4_STATUS,
INT5_STATUS, INT6_STATUS, INT7_STATUS,
};
struct regmap_field *sub_mask_f[] = {
bd->rmap_fields[F_INT1_SET],
bd->rmap_fields[F_INT2_SET],
bd->rmap_fields[F_INT3_SET],
bd->rmap_fields[F_INT4_SET],
bd->rmap_fields[F_INT5_SET],
bd->rmap_fields[F_INT6_SET],
bd->rmap_fields[F_INT7_SET],
};
/* Clear sub IRQs */
ret = regmap_read(bd->rmap, sub_status_reg[i], &sub_status);
if (ret) {
dev_err(bd->dev, "Failed to read IRQ sub-status\n");
goto err_umask;
}
ret = regmap_field_read(sub_mask_f[i], &sub_mask);
if (ret) {
dev_err(bd->dev, "Failed to read IRQ sub-mask\n");
goto err_umask;
}
/* Ack active sub-statuses */
sub_status &= sub_mask;
ret = regmap_write(bd->rmap, sub_status_reg[i], sub_status);
if (ret) {
dev_err(bd->dev, "Failed to ack sub-IRQ\n");
goto err_umask;
}
}
ret = regmap_field_write(bd->rmap_fields[F_INT0_SET], mask);
if (ret)
/* May as well retry once */
goto err_umask;
/* Read whole chip state */
ret = bd9995x_get_chip_state(bd, &state);
if (ret < 0) {
dev_err(bd->dev, "Failed to read chip state\n");
} else {
mutex_lock(&bd->lock);
bd->state = state;
mutex_unlock(&bd->lock);
power_supply_changed(bd->charger);
}
return IRQ_HANDLED;
err_umask:
ret = regmap_field_write(bd->rmap_fields[F_INT0_SET], mask);
if (ret)
dev_err(bd->dev,
"Failed to un-mask F_INT0 - IRQ permanently disabled\n");
return IRQ_NONE;
}
static int __bd9995x_chip_reset(struct bd9995x_device *bd)
{
int ret, state;
int rst_check_counter = 10;
u16 tmp = ALLRST | OTPLD;
ret = regmap_raw_write(bd->rmap, SYSTEM_CTRL_SET, &tmp, 2);
if (ret < 0)
return ret;
do {
ret = regmap_field_read(bd->rmap_fields[F_OTPLD_STATE], &state);
if (ret)
return ret;
msleep(10);
} while (state == 0 && --rst_check_counter);
if (!rst_check_counter) {
dev_err(bd->dev, "chip reset not completed\n");
return -ETIMEDOUT;
}
tmp = 0;
ret = regmap_raw_write(bd->rmap, SYSTEM_CTRL_SET, &tmp, 2);
return ret;
}
static int bd9995x_hw_init(struct bd9995x_device *bd)
{
int ret;
int i;
struct bd9995x_state state;
struct bd9995x_init_data *id = &bd->init_data;
const struct {
enum bd9995x_fields id;
u16 value;
} init_data[] = {
/* Enable the charging trigger after SDP charger attached */
{F_SDP_CHG_TRIG_EN, 1},
/* Enable charging trigger after SDP charger attached */
{F_SDP_CHG_TRIG, 1},
/* Disable charging trigger by BC1.2 detection */
{F_VBUS_BC_DISEN, 1},
/* Disable charging trigger by BC1.2 detection */
{F_VCC_BC_DISEN, 1},
/* Disable automatic limitation of the input current */
{F_ILIM_AUTO_DISEN, 1},
/* Select current limitation when SDP charger attached*/
{F_SDP_500_SEL, 1},
/* Select current limitation when DCP charger attached */
{F_DCP_2500_SEL, 1},
{F_VSYSREG_SET, id->vsysreg_set},
/* Activate USB charging and DC/DC converter */
{F_USB_SUS, 0},
/* DCDC clock: 1200 kHz*/
{F_DCDC_CLK_SEL, 3},
/* Enable charging */
{F_CHG_EN, 1},
/* Disable Input current Limit setting voltage measurement */
{F_EXTIADPEN, 0},
/* Disable input current limiting */
{F_VSYS_PRIORITY, 1},
{F_IBUS_LIM_SET, id->ibus_lim_set},
{F_ICC_LIM_SET, id->icc_lim_set},
/* Charge Termination Current Setting to 0*/
{F_ITERM_SET, id->iterm_set},
/* Trickle-charge Current Setting */
{F_ITRICH_SET, id->itrich_set},
/* Pre-charge Current setting */
{F_IPRECH_SET, id->iprech_set},
/* Fast Charge Current for constant current phase */
{F_ICHG_SET, id->ichg_set},
/* Fast Charge Voltage Regulation Setting */
{F_VFASTCHG_REG_SET1, id->vfastchg_reg_set1},
/* Set Pre-charge Voltage Threshold for trickle charging. */
{F_VPRECHG_TH_SET, id->vprechg_th_set},
{F_VRECHG_SET, id->vrechg_set},
{F_VBATOVP_SET, id->vbatovp_set},
/* Reverse buck boost voltage Setting */
{F_VRBOOST_SET, 0},
/* Disable fast-charging watchdog */
{F_WDT_FST, 0},
/* Disable pre-charging watchdog */
{F_WDT_PRE, 0},
/* Power save off */
{F_POWER_SAVE_MODE, 0},
{F_INT1_SET, INT1_ALL},
{F_INT2_SET, INT2_ALL},
{F_INT3_SET, INT3_ALL},
{F_INT4_SET, INT4_ALL},
{F_INT5_SET, INT5_ALL},
{F_INT6_SET, INT6_ALL},
{F_INT7_SET, INT7_ALL},
};
/*
* Currently we initialize charger to a known state at startup.
* If we want to allow for example the boot code to initialize
* charger we should get rid of this.
*/
ret = __bd9995x_chip_reset(bd);
if (ret < 0)
return ret;
/* Initialize currents/voltages and other parameters */
for (i = 0; i < ARRAY_SIZE(init_data); i++) {
ret = regmap_field_write(bd->rmap_fields[init_data[i].id],
init_data[i].value);
if (ret) {
dev_err(bd->dev, "failed to initialize charger (%d)\n",
ret);
return ret;
}
}
ret = bd9995x_get_chip_state(bd, &state);
if (ret < 0)
return ret;
mutex_lock(&bd->lock);
bd->state = state;
mutex_unlock(&bd->lock);
return 0;
}
static enum power_supply_property bd9995x_power_supply_props[] = {
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CHARGE_AVG,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
/* Battery props we access through charger */
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_MODEL_NAME,
};
static const struct power_supply_desc bd9995x_power_supply_desc = {
.name = "bd9995x-charger",
.type = POWER_SUPPLY_TYPE_USB,
.properties = bd9995x_power_supply_props,
.num_properties = ARRAY_SIZE(bd9995x_power_supply_props),
.get_property = bd9995x_power_supply_get_property,
};
/*
* Limit configurations for vbus-input-current and vcc-vacp-input-current
* Minimum limit is 0 uA. Max is 511 * 32000 uA = 16352000 uA. This is
* configured by writing a register so that each increment in register
* value equals to 32000 uA limit increment.
*
* Eg, value 0x0 is limit 0, value 0x1 is limit 32000, ...
* Describe the setting in linear_range table.
*/
static const struct linear_range input_current_limit_ranges[] = {
LINEAR_RANGE(0, 0x0, 0x1ff, 32000),
};
/* Possible trickle, pre-charging and termination current values */
static const struct linear_range charging_current_ranges[] = {
LINEAR_RANGE(0, 0x0, 0x10, 64000),
LINEAR_RANGE(1024000, 0x11, 0x1f, 0),
};
/*
* Fast charging voltage regulation, starting re-charging limit
* and battery over voltage protection have same possible values
*/
static const struct linear_range charge_voltage_regulation_ranges[] = {
LINEAR_RANGE(2560000, 0, 0xA0, 0),
LINEAR_RANGE(2560000, 0xA0, 0x4B0, 16000),
LINEAR_RANGE(19200000, 0x4B0, 0x7FF, 0),
};
/* Possible VSYS voltage regulation values */
static const struct linear_range vsys_voltage_regulation_ranges[] = {
LINEAR_RANGE(2560000, 0, 0x28, 0),
LINEAR_RANGE(2560000, 0x28, 0x12C, 64000),
LINEAR_RANGE(19200000, 0x12C, 0x1FF, 0),
};
/* Possible settings for switching from trickle to pre-charging limits */
static const struct linear_range trickle_to_pre_threshold_ranges[] = {
LINEAR_RANGE(2048000, 0, 0x20, 0),
LINEAR_RANGE(2048000, 0x20, 0x12C, 64000),
LINEAR_RANGE(19200000, 0x12C, 0x1FF, 0),
};
/* Possible current values for fast-charging constant current phase */
static const struct linear_range fast_charge_current_ranges[] = {
LINEAR_RANGE(0, 0, 0xFF, 64000),
};
struct battery_init {
const char *name;
int *info_data;
const struct linear_range *range;
int ranges;
u16 *data;
};
struct dt_init {
char *prop;
const struct linear_range *range;
int ranges;
u16 *data;
};
static int bd9995x_fw_probe(struct bd9995x_device *bd)
{
int ret;
struct power_supply_battery_info *info;
u32 property;
int i;
int regval;
bool found;
struct bd9995x_init_data *init = &bd->init_data;
struct battery_init battery_inits[] = {
{
.name = "trickle-charging current",
.range = &charging_current_ranges[0],
.ranges = 2,
.data = &init->itrich_set,
}, {
.name = "pre-charging current",
.range = &charging_current_ranges[0],
.ranges = 2,
.data = &init->iprech_set,
}, {
.name = "pre-to-trickle charge voltage threshold",
.range = &trickle_to_pre_threshold_ranges[0],
.ranges = 2,
.data = &init->vprechg_th_set,
}, {
.name = "charging termination current",
.range = &charging_current_ranges[0],
.ranges = 2,
.data = &init->iterm_set,
}, {
.name = "charging re-start voltage",
.range = &charge_voltage_regulation_ranges[0],
.ranges = 2,
.data = &init->vrechg_set,
}, {
.name = "battery overvoltage limit",
.range = &charge_voltage_regulation_ranges[0],
.ranges = 2,
.data = &init->vbatovp_set,
}, {
.name = "fast-charging max current",
.range = &fast_charge_current_ranges[0],
.ranges = 1,
.data = &init->ichg_set,
}, {
.name = "fast-charging voltage",
.range = &charge_voltage_regulation_ranges[0],
.ranges = 2,
.data = &init->vfastchg_reg_set1,
},
};
struct dt_init props[] = {
{
.prop = "rohm,vsys-regulation-microvolt",
.range = &vsys_voltage_regulation_ranges[0],
.ranges = 2,
.data = &init->vsysreg_set,
}, {
.prop = "rohm,vbus-input-current-limit-microamp",
.range = &input_current_limit_ranges[0],
.ranges = 1,
.data = &init->ibus_lim_set,
}, {
.prop = "rohm,vcc-input-current-limit-microamp",
.range = &input_current_limit_ranges[0],
.ranges = 1,
.data = &init->icc_lim_set,
},
};
/*
* The power_supply_get_battery_info() does not support getting values
* from ACPI. Let's fix it if ACPI is required here.
*/
ret = power_supply_get_battery_info(bd->charger, &info);
if (ret < 0)
return ret;
/* Put pointers to the generic battery info */
battery_inits[0].info_data = &info->tricklecharge_current_ua;
battery_inits[1].info_data = &info->precharge_current_ua;
battery_inits[2].info_data = &info->precharge_voltage_max_uv;
battery_inits[3].info_data = &info->charge_term_current_ua;
battery_inits[4].info_data = &info->charge_restart_voltage_uv;
battery_inits[5].info_data = &info->overvoltage_limit_uv;
battery_inits[6].info_data = &info->constant_charge_current_max_ua;
battery_inits[7].info_data = &info->constant_charge_voltage_max_uv;
for (i = 0; i < ARRAY_SIZE(battery_inits); i++) {
int val = *battery_inits[i].info_data;
const struct linear_range *range = battery_inits[i].range;
int ranges = battery_inits[i].ranges;
if (val == -EINVAL)
continue;
ret = linear_range_get_selector_low_array(range, ranges, val,
®val, &found);
if (ret) {
dev_err(bd->dev, "Unsupported value for %s\n",
battery_inits[i].name);
power_supply_put_battery_info(bd->charger, info);
return -EINVAL;
}
if (!found) {
dev_warn(bd->dev,
"Unsupported value for %s - using smaller\n",
battery_inits[i].name);
}
*(battery_inits[i].data) = regval;
}
power_supply_put_battery_info(bd->charger, info);
for (i = 0; i < ARRAY_SIZE(props); i++) {
ret = device_property_read_u32(bd->dev, props[i].prop,
&property);
if (ret < 0) {
dev_err(bd->dev, "failed to read %s", props[i].prop);
return ret;
}
ret = linear_range_get_selector_low_array(props[i].range,
props[i].ranges,
property, ®val,
&found);
if (ret) {
dev_err(bd->dev, "Unsupported value for '%s'\n",
props[i].prop);
return -EINVAL;
}
if (!found) {
dev_warn(bd->dev,
"Unsupported value for '%s' - using smaller\n",
props[i].prop);
}
*(props[i].data) = regval;
}
return 0;
}
static void bd9995x_chip_reset(void *bd)
{
__bd9995x_chip_reset(bd);
}
static int bd9995x_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct bd9995x_device *bd;
struct power_supply_config psy_cfg = {};
int ret;
int i;
bd = devm_kzalloc(dev, sizeof(*bd), GFP_KERNEL);
if (!bd)
return -ENOMEM;
bd->client = client;
bd->dev = dev;
psy_cfg.drv_data = bd;
psy_cfg.of_node = dev->of_node;
mutex_init(&bd->lock);
bd->rmap = devm_regmap_init_i2c(client, &bd9995x_regmap_config);
if (IS_ERR(bd->rmap)) {
dev_err(dev, "Failed to setup register access via i2c\n");
return PTR_ERR(bd->rmap);
}
for (i = 0; i < ARRAY_SIZE(bd9995x_reg_fields); i++) {
const struct reg_field *reg_fields = bd9995x_reg_fields;
bd->rmap_fields[i] = devm_regmap_field_alloc(dev, bd->rmap,
reg_fields[i]);
if (IS_ERR(bd->rmap_fields[i])) {
dev_err(dev, "cannot allocate regmap field\n");
return PTR_ERR(bd->rmap_fields[i]);
}
}
i2c_set_clientdata(client, bd);
ret = regmap_field_read(bd->rmap_fields[F_CHIP_ID], &bd->chip_id);
if (ret) {
dev_err(dev, "Cannot read chip ID.\n");
return ret;
}
if (bd->chip_id != BD99954_ID) {
dev_err(dev, "Chip with ID=0x%x, not supported!\n",
bd->chip_id);
return -ENODEV;
}
ret = regmap_field_read(bd->rmap_fields[F_CHIP_REV], &bd->chip_rev);
if (ret) {
dev_err(dev, "Cannot read revision.\n");
return ret;
}
dev_info(bd->dev, "Found BD99954 chip rev %d\n", bd->chip_rev);
/*
* We need to init the psy before we can call
* power_supply_get_battery_info() for it
*/
bd->charger = devm_power_supply_register(bd->dev,
&bd9995x_power_supply_desc,
&psy_cfg);
if (IS_ERR(bd->charger)) {
dev_err(dev, "Failed to register power supply\n");
return PTR_ERR(bd->charger);
}
ret = bd9995x_fw_probe(bd);
if (ret < 0) {
dev_err(dev, "Cannot read device properties.\n");
return ret;
}
ret = bd9995x_hw_init(bd);
if (ret < 0) {
dev_err(dev, "Cannot initialize the chip.\n");
return ret;
}
ret = devm_add_action_or_reset(dev, bd9995x_chip_reset, bd);
if (ret)
return ret;
return devm_request_threaded_irq(dev, client->irq, NULL,
bd9995x_irq_handler_thread,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
BD9995X_IRQ_PIN, bd);
}
static const struct of_device_id bd9995x_of_match[] = {
{ .compatible = "rohm,bd99954", },
{ }
};
MODULE_DEVICE_TABLE(of, bd9995x_of_match);
static struct i2c_driver bd9995x_driver = {
.driver = {
.name = "bd9995x-charger",
.of_match_table = bd9995x_of_match,
},
.probe = bd9995x_probe,
};
module_i2c_driver(bd9995x_driver);
MODULE_AUTHOR("Laine Markus <[email protected]>");
MODULE_DESCRIPTION("ROHM BD99954 charger driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/bd99954-charger.c |
// SPDX-License-Identifier: GPL-2.0+
/*
* Power supply driver for ChromeOS EC based USB PD Charger.
*
* Copyright (c) 2014 - 2018 Google, Inc
*/
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_data/cros_usbpd_notify.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
#define CHARGER_USBPD_DIR_NAME "CROS_USBPD_CHARGER%d"
#define CHARGER_DEDICATED_DIR_NAME "CROS_DEDICATED_CHARGER"
#define CHARGER_DIR_NAME_LENGTH (sizeof(CHARGER_USBPD_DIR_NAME) >= \
sizeof(CHARGER_DEDICATED_DIR_NAME) ? \
sizeof(CHARGER_USBPD_DIR_NAME) : \
sizeof(CHARGER_DEDICATED_DIR_NAME))
#define CHARGER_CACHE_UPDATE_DELAY msecs_to_jiffies(500)
#define CHARGER_MANUFACTURER_MODEL_LENGTH 32
#define DRV_NAME "cros-usbpd-charger"
struct port_data {
int port_number;
char name[CHARGER_DIR_NAME_LENGTH];
char manufacturer[CHARGER_MANUFACTURER_MODEL_LENGTH];
char model_name[CHARGER_MANUFACTURER_MODEL_LENGTH];
struct power_supply *psy;
struct power_supply_desc psy_desc;
int psy_usb_type;
int psy_online;
int psy_status;
int psy_current_max;
int psy_voltage_max_design;
int psy_voltage_now;
int psy_power_max;
struct charger_data *charger;
unsigned long last_update;
};
struct charger_data {
struct device *dev;
struct cros_ec_dev *ec_dev;
struct cros_ec_device *ec_device;
int num_charger_ports;
int num_usbpd_ports;
int num_registered_psy;
struct port_data *ports[EC_USB_PD_MAX_PORTS];
struct notifier_block notifier;
};
static enum power_supply_property cros_usbpd_charger_props[] = {
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_USB_TYPE
};
static enum power_supply_property cros_usbpd_dedicated_charger_props[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
};
static enum power_supply_usb_type cros_usbpd_charger_usb_types[] = {
POWER_SUPPLY_USB_TYPE_UNKNOWN,
POWER_SUPPLY_USB_TYPE_SDP,
POWER_SUPPLY_USB_TYPE_DCP,
POWER_SUPPLY_USB_TYPE_CDP,
POWER_SUPPLY_USB_TYPE_C,
POWER_SUPPLY_USB_TYPE_PD,
POWER_SUPPLY_USB_TYPE_PD_DRP,
POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID
};
/* Input voltage/current limit in mV/mA. Default to none. */
static u16 input_voltage_limit = EC_POWER_LIMIT_NONE;
static u16 input_current_limit = EC_POWER_LIMIT_NONE;
static bool cros_usbpd_charger_port_is_dedicated(struct port_data *port)
{
return port->port_number >= port->charger->num_usbpd_ports;
}
static int cros_usbpd_charger_ec_command(struct charger_data *charger,
unsigned int version,
unsigned int command,
void *outdata,
unsigned int outsize,
void *indata,
unsigned int insize)
{
struct cros_ec_dev *ec_dev = charger->ec_dev;
struct cros_ec_command *msg;
int ret;
msg = kzalloc(struct_size(msg, data, max(outsize, insize)), GFP_KERNEL);
if (!msg)
return -ENOMEM;
msg->version = version;
msg->command = ec_dev->cmd_offset + command;
msg->outsize = outsize;
msg->insize = insize;
if (outsize)
memcpy(msg->data, outdata, outsize);
ret = cros_ec_cmd_xfer_status(charger->ec_device, msg);
if (ret >= 0 && insize)
memcpy(indata, msg->data, insize);
kfree(msg);
return ret;
}
static int cros_usbpd_charger_get_num_ports(struct charger_data *charger)
{
struct ec_response_charge_port_count resp;
int ret;
ret = cros_usbpd_charger_ec_command(charger, 0,
EC_CMD_CHARGE_PORT_COUNT,
NULL, 0, &resp, sizeof(resp));
if (ret < 0)
return ret;
return resp.port_count;
}
static int cros_usbpd_charger_get_usbpd_num_ports(struct charger_data *charger)
{
struct ec_response_usb_pd_ports resp;
int ret;
ret = cros_usbpd_charger_ec_command(charger, 0, EC_CMD_USB_PD_PORTS,
NULL, 0, &resp, sizeof(resp));
if (ret < 0)
return ret;
return resp.num_ports;
}
static int cros_usbpd_charger_get_discovery_info(struct port_data *port)
{
struct charger_data *charger = port->charger;
struct ec_params_usb_pd_discovery_entry resp;
struct ec_params_usb_pd_info_request req;
int ret;
req.port = port->port_number;
ret = cros_usbpd_charger_ec_command(charger, 0,
EC_CMD_USB_PD_DISCOVERY,
&req, sizeof(req),
&resp, sizeof(resp));
if (ret < 0) {
dev_err(charger->dev,
"Unable to query discovery info (err:0x%x)\n", ret);
return ret;
}
dev_dbg(charger->dev, "Port %d: VID = 0x%x, PID=0x%x, PTYPE=0x%x\n",
port->port_number, resp.vid, resp.pid, resp.ptype);
snprintf(port->manufacturer, sizeof(port->manufacturer), "%x",
resp.vid);
snprintf(port->model_name, sizeof(port->model_name), "%x", resp.pid);
return 0;
}
static int cros_usbpd_charger_get_power_info(struct port_data *port)
{
struct charger_data *charger = port->charger;
struct ec_response_usb_pd_power_info resp;
struct ec_params_usb_pd_power_info req;
int last_psy_status, last_psy_usb_type;
struct device *dev = charger->dev;
int ret;
req.port = port->port_number;
ret = cros_usbpd_charger_ec_command(charger, 0,
EC_CMD_USB_PD_POWER_INFO,
&req, sizeof(req),
&resp, sizeof(resp));
if (ret < 0) {
dev_err(dev, "Unable to query PD power info (err:0x%x)\n", ret);
return ret;
}
last_psy_status = port->psy_status;
last_psy_usb_type = port->psy_usb_type;
switch (resp.role) {
case USB_PD_PORT_POWER_DISCONNECTED:
port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
port->psy_online = 0;
break;
case USB_PD_PORT_POWER_SOURCE:
port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
port->psy_online = 0;
break;
case USB_PD_PORT_POWER_SINK:
port->psy_status = POWER_SUPPLY_STATUS_CHARGING;
port->psy_online = 1;
break;
case USB_PD_PORT_POWER_SINK_NOT_CHARGING:
port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
port->psy_online = 1;
break;
default:
dev_err(dev, "Unknown role %d\n", resp.role);
break;
}
port->psy_voltage_max_design = resp.meas.voltage_max;
port->psy_voltage_now = resp.meas.voltage_now;
port->psy_current_max = resp.meas.current_max;
port->psy_power_max = resp.max_power;
switch (resp.type) {
case USB_CHG_TYPE_BC12_SDP:
case USB_CHG_TYPE_VBUS:
port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
break;
case USB_CHG_TYPE_NONE:
/*
* For dual-role devices when we are a source, the firmware
* reports the type as NONE. Report such chargers as type
* USB_PD_DRP.
*/
if (resp.role == USB_PD_PORT_POWER_SOURCE && resp.dualrole)
port->psy_usb_type = POWER_SUPPLY_USB_TYPE_PD_DRP;
else
port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
break;
case USB_CHG_TYPE_OTHER:
case USB_CHG_TYPE_PROPRIETARY:
port->psy_usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;
break;
case USB_CHG_TYPE_C:
port->psy_usb_type = POWER_SUPPLY_USB_TYPE_C;
break;
case USB_CHG_TYPE_BC12_DCP:
port->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
break;
case USB_CHG_TYPE_BC12_CDP:
port->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
break;
case USB_CHG_TYPE_PD:
if (resp.dualrole)
port->psy_usb_type = POWER_SUPPLY_USB_TYPE_PD_DRP;
else
port->psy_usb_type = POWER_SUPPLY_USB_TYPE_PD;
break;
case USB_CHG_TYPE_UNKNOWN:
/*
* While the EC is trying to determine the type of charger that
* has been plugged in, it will report the charger type as
* unknown. Additionally since the power capabilities are
* unknown, report the max current and voltage as zero.
*/
port->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
port->psy_voltage_max_design = 0;
port->psy_current_max = 0;
break;
default:
dev_dbg(dev, "Port %d: default case!\n", port->port_number);
port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
}
if (cros_usbpd_charger_port_is_dedicated(port))
port->psy_desc.type = POWER_SUPPLY_TYPE_MAINS;
else
port->psy_desc.type = POWER_SUPPLY_TYPE_USB;
dev_dbg(dev,
"Port %d: type=%d vmax=%d vnow=%d cmax=%d clim=%d pmax=%d\n",
port->port_number, resp.type, resp.meas.voltage_max,
resp.meas.voltage_now, resp.meas.current_max,
resp.meas.current_lim, resp.max_power);
/*
* If power supply type or status changed, explicitly call
* power_supply_changed. This results in udev event getting generated
* and allows user mode apps to react quicker instead of waiting for
* their next poll of power supply status.
*/
if (last_psy_usb_type != port->psy_usb_type ||
last_psy_status != port->psy_status)
power_supply_changed(port->psy);
return 0;
}
static int cros_usbpd_charger_get_port_status(struct port_data *port,
bool ratelimit)
{
int ret;
if (ratelimit &&
time_is_after_jiffies(port->last_update +
CHARGER_CACHE_UPDATE_DELAY))
return 0;
ret = cros_usbpd_charger_get_power_info(port);
if (ret < 0)
return ret;
if (!cros_usbpd_charger_port_is_dedicated(port))
ret = cros_usbpd_charger_get_discovery_info(port);
port->last_update = jiffies;
return ret;
}
static int cros_usbpd_charger_set_ext_power_limit(struct charger_data *charger,
u16 current_lim,
u16 voltage_lim)
{
struct ec_params_external_power_limit_v1 req;
int ret;
req.current_lim = current_lim;
req.voltage_lim = voltage_lim;
ret = cros_usbpd_charger_ec_command(charger, 0,
EC_CMD_EXTERNAL_POWER_LIMIT,
&req, sizeof(req), NULL, 0);
if (ret < 0)
dev_err(charger->dev,
"Unable to set the 'External Power Limit': %d\n", ret);
return ret;
}
static void cros_usbpd_charger_power_changed(struct power_supply *psy)
{
struct port_data *port = power_supply_get_drvdata(psy);
struct charger_data *charger = port->charger;
int i;
for (i = 0; i < charger->num_registered_psy; i++)
cros_usbpd_charger_get_port_status(charger->ports[i], false);
}
static int cros_usbpd_charger_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct port_data *port = power_supply_get_drvdata(psy);
struct charger_data *charger = port->charger;
struct cros_ec_device *ec_device = charger->ec_device;
struct device *dev = charger->dev;
int ret;
/* Only refresh ec_port_status for dynamic properties */
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
/*
* If mkbp_event_supported, then we can be assured that
* the driver's state for the online property is consistent
* with the hardware. However, if we aren't event driven,
* the optimization before to skip an ec_port_status get
* and only returned cached values of the online property will
* cause a delay in detecting a cable attach until one of the
* other properties are read.
*
* Allow an ec_port_status refresh for online property check
* if we're not already online to check for plug events if
* not mkbp_event_supported.
*/
if (ec_device->mkbp_event_supported || port->psy_online)
break;
fallthrough;
case POWER_SUPPLY_PROP_CURRENT_MAX:
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = cros_usbpd_charger_get_port_status(port, true);
if (ret < 0) {
dev_err(dev, "Failed to get port status (err:0x%x)\n",
ret);
return -EINVAL;
}
break;
default:
break;
}
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = port->psy_online;
break;
case POWER_SUPPLY_PROP_STATUS:
val->intval = port->psy_status;
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
val->intval = port->psy_current_max * 1000;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
val->intval = port->psy_voltage_max_design * 1000;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = port->psy_voltage_now * 1000;
break;
case POWER_SUPPLY_PROP_USB_TYPE:
val->intval = port->psy_usb_type;
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
if (input_current_limit == EC_POWER_LIMIT_NONE)
val->intval = -1;
else
val->intval = input_current_limit * 1000;
break;
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
if (input_voltage_limit == EC_POWER_LIMIT_NONE)
val->intval = -1;
else
val->intval = input_voltage_limit * 1000;
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = port->model_name;
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = port->manufacturer;
break;
default:
return -EINVAL;
}
return 0;
}
static int cros_usbpd_charger_set_prop(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct port_data *port = power_supply_get_drvdata(psy);
struct charger_data *charger = port->charger;
struct device *dev = charger->dev;
u16 intval;
int ret;
/* U16_MAX in mV/mA is the maximum supported value */
if (val->intval >= U16_MAX * 1000)
return -EINVAL;
/* A negative number is used to clear the limit */
if (val->intval < 0)
intval = EC_POWER_LIMIT_NONE;
else /* Convert from uA/uV to mA/mV */
intval = val->intval / 1000;
switch (psp) {
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = cros_usbpd_charger_set_ext_power_limit(charger, intval,
input_voltage_limit);
if (ret < 0)
break;
input_current_limit = intval;
if (input_current_limit == EC_POWER_LIMIT_NONE)
dev_info(dev,
"External Current Limit cleared for all ports\n");
else
dev_info(dev,
"External Current Limit set to %dmA for all ports\n",
input_current_limit);
break;
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
ret = cros_usbpd_charger_set_ext_power_limit(charger,
input_current_limit,
intval);
if (ret < 0)
break;
input_voltage_limit = intval;
if (input_voltage_limit == EC_POWER_LIMIT_NONE)
dev_info(dev,
"External Voltage Limit cleared for all ports\n");
else
dev_info(dev,
"External Voltage Limit set to %dmV for all ports\n",
input_voltage_limit);
break;
default:
ret = -EINVAL;
}
return ret;
}
static int cros_usbpd_charger_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
ret = 1;
break;
default:
ret = 0;
}
return ret;
}
static int cros_usbpd_charger_ec_event(struct notifier_block *nb,
unsigned long host_event,
void *_notify)
{
struct charger_data *charger = container_of(nb, struct charger_data,
notifier);
cros_usbpd_charger_power_changed(charger->ports[0]->psy);
return NOTIFY_OK;
}
static void cros_usbpd_charger_unregister_notifier(void *data)
{
struct charger_data *charger = data;
cros_usbpd_unregister_notify(&charger->notifier);
}
static int cros_usbpd_charger_probe(struct platform_device *pd)
{
struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
struct cros_ec_device *ec_device = ec_dev->ec_dev;
struct power_supply_desc *psy_desc;
struct device *dev = &pd->dev;
struct charger_data *charger;
struct power_supply *psy;
struct port_data *port;
int ret = -EINVAL;
int i;
charger = devm_kzalloc(dev, sizeof(struct charger_data),
GFP_KERNEL);
if (!charger)
return -ENOMEM;
charger->dev = dev;
charger->ec_dev = ec_dev;
charger->ec_device = ec_device;
platform_set_drvdata(pd, charger);
/*
* We need to know the number of USB PD ports in order to know whether
* there is a dedicated port. The dedicated port will always be
* after the USB PD ports, and there should be only one.
*/
charger->num_usbpd_ports =
cros_usbpd_charger_get_usbpd_num_ports(charger);
if (charger->num_usbpd_ports <= 0) {
/*
* This can happen on a system that doesn't support USB PD.
* Log a message, but no need to warn.
*/
dev_info(dev, "No USB PD charging ports found\n");
}
charger->num_charger_ports = cros_usbpd_charger_get_num_ports(charger);
if (charger->num_charger_ports < 0) {
/*
* This can happen on a system that doesn't support USB PD.
* Log a message, but no need to warn.
* Older ECs do not support the above command, in that case
* let's set up the number of charger ports equal to the number
* of USB PD ports
*/
dev_info(dev, "Could not get charger port count\n");
charger->num_charger_ports = charger->num_usbpd_ports;
}
if (charger->num_charger_ports <= 0) {
/*
* This can happen on a system that doesn't support USB PD and
* doesn't have a dedicated port.
* Log a message, but no need to warn.
*/
dev_info(dev, "No charging ports found\n");
ret = -ENODEV;
goto fail_nowarn;
}
/*
* Sanity checks on the number of ports:
* there should be at most 1 dedicated port
*/
if (charger->num_charger_ports < charger->num_usbpd_ports ||
charger->num_charger_ports > (charger->num_usbpd_ports + 1)) {
dev_err(dev, "Unexpected number of charge port count\n");
ret = -EPROTO;
goto fail_nowarn;
}
for (i = 0; i < charger->num_charger_ports; i++) {
struct power_supply_config psy_cfg = {};
port = devm_kzalloc(dev, sizeof(struct port_data), GFP_KERNEL);
if (!port) {
ret = -ENOMEM;
goto fail;
}
port->charger = charger;
port->port_number = i;
psy_desc = &port->psy_desc;
psy_desc->get_property = cros_usbpd_charger_get_prop;
psy_desc->set_property = cros_usbpd_charger_set_prop;
psy_desc->property_is_writeable =
cros_usbpd_charger_property_is_writeable;
psy_desc->external_power_changed =
cros_usbpd_charger_power_changed;
psy_cfg.drv_data = port;
if (cros_usbpd_charger_port_is_dedicated(port)) {
sprintf(port->name, CHARGER_DEDICATED_DIR_NAME);
psy_desc->type = POWER_SUPPLY_TYPE_MAINS;
psy_desc->properties =
cros_usbpd_dedicated_charger_props;
psy_desc->num_properties =
ARRAY_SIZE(cros_usbpd_dedicated_charger_props);
} else {
sprintf(port->name, CHARGER_USBPD_DIR_NAME, i);
psy_desc->type = POWER_SUPPLY_TYPE_USB;
psy_desc->properties = cros_usbpd_charger_props;
psy_desc->num_properties =
ARRAY_SIZE(cros_usbpd_charger_props);
psy_desc->usb_types = cros_usbpd_charger_usb_types;
psy_desc->num_usb_types =
ARRAY_SIZE(cros_usbpd_charger_usb_types);
}
psy_desc->name = port->name;
psy = devm_power_supply_register_no_ws(dev, psy_desc,
&psy_cfg);
if (IS_ERR(psy)) {
dev_err(dev, "Failed to register power supply\n");
continue;
}
port->psy = psy;
charger->ports[charger->num_registered_psy++] = port;
}
if (!charger->num_registered_psy) {
ret = -ENODEV;
dev_err(dev, "No power supplies registered\n");
goto fail;
}
/* Get PD events from the EC */
charger->notifier.notifier_call = cros_usbpd_charger_ec_event;
ret = cros_usbpd_register_notify(&charger->notifier);
if (ret < 0) {
dev_warn(dev, "failed to register notifier\n");
} else {
ret = devm_add_action_or_reset(dev,
cros_usbpd_charger_unregister_notifier,
charger);
if (ret < 0)
goto fail;
}
return 0;
fail:
WARN(1, "%s: Failing probe (err:0x%x)\n", dev_name(dev), ret);
fail_nowarn:
dev_info(dev, "Failing probe (err:0x%x)\n", ret);
return ret;
}
#ifdef CONFIG_PM_SLEEP
static int cros_usbpd_charger_resume(struct device *dev)
{
struct charger_data *charger = dev_get_drvdata(dev);
int i;
if (!charger)
return 0;
for (i = 0; i < charger->num_registered_psy; i++) {
power_supply_changed(charger->ports[i]->psy);
charger->ports[i]->last_update =
jiffies - CHARGER_CACHE_UPDATE_DELAY;
}
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(cros_usbpd_charger_pm_ops, NULL,
cros_usbpd_charger_resume);
static struct platform_driver cros_usbpd_charger_driver = {
.driver = {
.name = DRV_NAME,
.pm = &cros_usbpd_charger_pm_ops,
},
.probe = cros_usbpd_charger_probe
};
module_platform_driver(cros_usbpd_charger_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ChromeOS EC USBPD charger");
MODULE_ALIAS("platform:" DRV_NAME);
| linux-master | drivers/power/supply/cros_usbpd-charger.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2021 MediaTek Inc.
*/
#include <linux/devm-helpers.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/linear_range.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#define MT6360_PMU_CHG_CTRL1 0x311
#define MT6360_PMU_CHG_CTRL2 0x312
#define MT6360_PMU_CHG_CTRL3 0x313
#define MT6360_PMU_CHG_CTRL4 0x314
#define MT6360_PMU_CHG_CTRL5 0x315
#define MT6360_PMU_CHG_CTRL6 0x316
#define MT6360_PMU_CHG_CTRL7 0x317
#define MT6360_PMU_CHG_CTRL8 0x318
#define MT6360_PMU_CHG_CTRL9 0x319
#define MT6360_PMU_CHG_CTRL10 0x31A
#define MT6360_PMU_DEVICE_TYPE 0x322
#define MT6360_PMU_USB_STATUS1 0x327
#define MT6360_PMU_CHG_STAT 0x34A
#define MT6360_PMU_CHG_CTRL19 0x361
#define MT6360_PMU_FOD_STAT 0x3E7
/* MT6360_PMU_CHG_CTRL1 */
#define MT6360_FSLP_SHFT (3)
#define MT6360_FSLP_MASK BIT(MT6360_FSLP_SHFT)
#define MT6360_OPA_MODE_SHFT (0)
#define MT6360_OPA_MODE_MASK BIT(MT6360_OPA_MODE_SHFT)
/* MT6360_PMU_CHG_CTRL2 */
#define MT6360_IINLMTSEL_SHFT (2)
#define MT6360_IINLMTSEL_MASK GENMASK(3, 2)
/* MT6360_PMU_CHG_CTRL3 */
#define MT6360_IAICR_SHFT (2)
#define MT6360_IAICR_MASK GENMASK(7, 2)
#define MT6360_ILIM_EN_MASK BIT(0)
/* MT6360_PMU_CHG_CTRL4 */
#define MT6360_VOREG_SHFT (1)
#define MT6360_VOREG_MASK GENMASK(7, 1)
/* MT6360_PMU_CHG_CTRL5 */
#define MT6360_VOBST_MASK GENMASK(7, 2)
/* MT6360_PMU_CHG_CTRL6 */
#define MT6360_VMIVR_SHFT (1)
#define MT6360_VMIVR_MASK GENMASK(7, 1)
/* MT6360_PMU_CHG_CTRL7 */
#define MT6360_ICHG_SHFT (2)
#define MT6360_ICHG_MASK GENMASK(7, 2)
/* MT6360_PMU_CHG_CTRL8 */
#define MT6360_IPREC_SHFT (0)
#define MT6360_IPREC_MASK GENMASK(3, 0)
/* MT6360_PMU_CHG_CTRL9 */
#define MT6360_IEOC_SHFT (4)
#define MT6360_IEOC_MASK GENMASK(7, 4)
/* MT6360_PMU_CHG_CTRL10 */
#define MT6360_OTG_OC_MASK GENMASK(3, 0)
/* MT6360_PMU_DEVICE_TYPE */
#define MT6360_USBCHGEN_MASK BIT(7)
/* MT6360_PMU_USB_STATUS1 */
#define MT6360_USB_STATUS_SHFT (4)
#define MT6360_USB_STATUS_MASK GENMASK(6, 4)
/* MT6360_PMU_CHG_STAT */
#define MT6360_CHG_STAT_SHFT (6)
#define MT6360_CHG_STAT_MASK GENMASK(7, 6)
#define MT6360_VBAT_LVL_MASK BIT(5)
/* MT6360_PMU_CHG_CTRL19 */
#define MT6360_VINOVP_SHFT (5)
#define MT6360_VINOVP_MASK GENMASK(6, 5)
/* MT6360_PMU_FOD_STAT */
#define MT6360_CHRDET_EXT_MASK BIT(4)
/* uV */
#define MT6360_VMIVR_MIN 3900000
#define MT6360_VMIVR_MAX 13400000
#define MT6360_VMIVR_STEP 100000
/* uA */
#define MT6360_ICHG_MIN 100000
#define MT6360_ICHG_MAX 5000000
#define MT6360_ICHG_STEP 100000
/* uV */
#define MT6360_VOREG_MIN 3900000
#define MT6360_VOREG_MAX 4710000
#define MT6360_VOREG_STEP 10000
/* uA */
#define MT6360_AICR_MIN 100000
#define MT6360_AICR_MAX 3250000
#define MT6360_AICR_STEP 50000
/* uA */
#define MT6360_IPREC_MIN 100000
#define MT6360_IPREC_MAX 850000
#define MT6360_IPREC_STEP 50000
/* uA */
#define MT6360_IEOC_MIN 100000
#define MT6360_IEOC_MAX 850000
#define MT6360_IEOC_STEP 50000
enum {
MT6360_RANGE_VMIVR,
MT6360_RANGE_ICHG,
MT6360_RANGE_VOREG,
MT6360_RANGE_AICR,
MT6360_RANGE_IPREC,
MT6360_RANGE_IEOC,
MT6360_RANGE_MAX,
};
static const struct linear_range mt6360_chg_range[MT6360_RANGE_MAX] = {
LINEAR_RANGE_IDX(MT6360_RANGE_VMIVR, 3900000, 0, 0x5F, 100000),
LINEAR_RANGE_IDX(MT6360_RANGE_ICHG, 100000, 0, 0x31, 100000),
LINEAR_RANGE_IDX(MT6360_RANGE_VOREG, 3900000, 0, 0x51, 10000),
LINEAR_RANGE_IDX(MT6360_RANGE_AICR, 100000, 0, 0x3F, 50000),
LINEAR_RANGE_IDX(MT6360_RANGE_IPREC, 100000, 0, 0x0F, 50000),
LINEAR_RANGE_IDX(MT6360_RANGE_IEOC, 100000, 0, 0x0F, 50000),
};
struct mt6360_chg_info {
struct device *dev;
struct regmap *regmap;
struct power_supply_desc psy_desc;
struct power_supply *psy;
struct regulator_dev *otg_rdev;
struct mutex chgdet_lock;
u32 vinovp;
bool pwr_rdy;
bool bc12_en;
int psy_usb_type;
struct work_struct chrdet_work;
};
enum mt6360_iinlmtsel {
MT6360_IINLMTSEL_AICR_3250 = 0,
MT6360_IINLMTSEL_CHG_TYPE,
MT6360_IINLMTSEL_AICR,
MT6360_IINLMTSEL_LOWER_LEVEL,
};
enum mt6360_pmu_chg_type {
MT6360_CHG_TYPE_NOVBUS = 0,
MT6360_CHG_TYPE_UNDER_GOING,
MT6360_CHG_TYPE_SDP,
MT6360_CHG_TYPE_SDPNSTD,
MT6360_CHG_TYPE_DCP,
MT6360_CHG_TYPE_CDP,
MT6360_CHG_TYPE_DISABLE_BC12,
MT6360_CHG_TYPE_MAX,
};
static enum power_supply_usb_type mt6360_charger_usb_types[] = {
POWER_SUPPLY_USB_TYPE_UNKNOWN,
POWER_SUPPLY_USB_TYPE_SDP,
POWER_SUPPLY_USB_TYPE_DCP,
POWER_SUPPLY_USB_TYPE_CDP,
};
static int mt6360_get_chrdet_ext_stat(struct mt6360_chg_info *mci,
bool *pwr_rdy)
{
int ret;
unsigned int regval;
ret = regmap_read(mci->regmap, MT6360_PMU_FOD_STAT, ®val);
if (ret < 0)
return ret;
*pwr_rdy = (regval & MT6360_CHRDET_EXT_MASK) ? true : false;
return 0;
}
static int mt6360_charger_get_online(struct mt6360_chg_info *mci,
union power_supply_propval *val)
{
int ret;
bool pwr_rdy;
ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
if (ret < 0)
return ret;
val->intval = pwr_rdy ? true : false;
return 0;
}
static int mt6360_charger_get_status(struct mt6360_chg_info *mci,
union power_supply_propval *val)
{
int status, ret;
unsigned int regval;
bool pwr_rdy;
ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
if (ret < 0)
return ret;
if (!pwr_rdy) {
status = POWER_SUPPLY_STATUS_DISCHARGING;
goto out;
}
ret = regmap_read(mci->regmap, MT6360_PMU_CHG_STAT, ®val);
if (ret < 0)
return ret;
regval &= MT6360_CHG_STAT_MASK;
regval >>= MT6360_CHG_STAT_SHFT;
switch (regval) {
case 0x0:
status = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case 0x1:
status = POWER_SUPPLY_STATUS_CHARGING;
break;
case 0x2:
status = POWER_SUPPLY_STATUS_FULL;
break;
default:
ret = -EIO;
}
out:
if (!ret)
val->intval = status;
return ret;
}
static int mt6360_charger_get_charge_type(struct mt6360_chg_info *mci,
union power_supply_propval *val)
{
int type, ret;
unsigned int regval;
u8 chg_stat;
ret = regmap_read(mci->regmap, MT6360_PMU_CHG_STAT, ®val);
if (ret < 0)
return ret;
chg_stat = (regval & MT6360_CHG_STAT_MASK) >> MT6360_CHG_STAT_SHFT;
switch (chg_stat) {
case 0x01: /* Charge in Progress */
if (regval & MT6360_VBAT_LVL_MASK)
type = POWER_SUPPLY_CHARGE_TYPE_FAST;
else
type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
case 0x00: /* Not Charging */
case 0x02: /* Charge Done */
case 0x03: /* Charge Fault */
default:
type = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
}
val->intval = type;
return 0;
}
static int mt6360_charger_get_ichg(struct mt6360_chg_info *mci,
union power_supply_propval *val)
{
int ret;
u32 sel, value;
ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL7, &sel);
if (ret < 0)
return ret;
sel = (sel & MT6360_ICHG_MASK) >> MT6360_ICHG_SHFT;
ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_ICHG], sel, &value);
if (!ret)
val->intval = value;
return ret;
}
static int mt6360_charger_get_max_ichg(struct mt6360_chg_info *mci,
union power_supply_propval *val)
{
val->intval = MT6360_ICHG_MAX;
return 0;
}
static int mt6360_charger_get_cv(struct mt6360_chg_info *mci,
union power_supply_propval *val)
{
int ret;
u32 sel, value;
ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL4, &sel);
if (ret < 0)
return ret;
sel = (sel & MT6360_VOREG_MASK) >> MT6360_VOREG_SHFT;
ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_VOREG], sel, &value);
if (!ret)
val->intval = value;
return ret;
}
static int mt6360_charger_get_max_cv(struct mt6360_chg_info *mci,
union power_supply_propval *val)
{
val->intval = MT6360_VOREG_MAX;
return 0;
}
static int mt6360_charger_get_aicr(struct mt6360_chg_info *mci,
union power_supply_propval *val)
{
int ret;
u32 sel, value;
ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL3, &sel);
if (ret < 0)
return ret;
sel = (sel & MT6360_IAICR_MASK) >> MT6360_IAICR_SHFT;
ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_AICR], sel, &value);
if (!ret)
val->intval = value;
return ret;
}
static int mt6360_charger_get_mivr(struct mt6360_chg_info *mci,
union power_supply_propval *val)
{
int ret;
u32 sel, value;
ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL6, &sel);
if (ret < 0)
return ret;
sel = (sel & MT6360_VMIVR_MASK) >> MT6360_VMIVR_SHFT;
ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_VMIVR], sel, &value);
if (!ret)
val->intval = value;
return ret;
}
static int mt6360_charger_get_iprechg(struct mt6360_chg_info *mci,
union power_supply_propval *val)
{
int ret;
u32 sel, value;
ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL8, &sel);
if (ret < 0)
return ret;
sel = (sel & MT6360_IPREC_MASK) >> MT6360_IPREC_SHFT;
ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_IPREC], sel, &value);
if (!ret)
val->intval = value;
return ret;
}
static int mt6360_charger_get_ieoc(struct mt6360_chg_info *mci,
union power_supply_propval *val)
{
int ret;
u32 sel, value;
ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL9, &sel);
if (ret < 0)
return ret;
sel = (sel & MT6360_IEOC_MASK) >> MT6360_IEOC_SHFT;
ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_IEOC], sel, &value);
if (!ret)
val->intval = value;
return ret;
}
static int mt6360_charger_set_online(struct mt6360_chg_info *mci,
const union power_supply_propval *val)
{
u8 force_sleep = val->intval ? 0 : 1;
return regmap_update_bits(mci->regmap,
MT6360_PMU_CHG_CTRL1,
MT6360_FSLP_MASK,
force_sleep << MT6360_FSLP_SHFT);
}
static int mt6360_charger_set_ichg(struct mt6360_chg_info *mci,
const union power_supply_propval *val)
{
u32 sel;
linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_ICHG], val->intval, &sel);
return regmap_update_bits(mci->regmap,
MT6360_PMU_CHG_CTRL7,
MT6360_ICHG_MASK,
sel << MT6360_ICHG_SHFT);
}
static int mt6360_charger_set_cv(struct mt6360_chg_info *mci,
const union power_supply_propval *val)
{
u32 sel;
linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_VOREG], val->intval, &sel);
return regmap_update_bits(mci->regmap,
MT6360_PMU_CHG_CTRL4,
MT6360_VOREG_MASK,
sel << MT6360_VOREG_SHFT);
}
static int mt6360_charger_set_aicr(struct mt6360_chg_info *mci,
const union power_supply_propval *val)
{
u32 sel;
linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_AICR], val->intval, &sel);
return regmap_update_bits(mci->regmap,
MT6360_PMU_CHG_CTRL3,
MT6360_IAICR_MASK,
sel << MT6360_IAICR_SHFT);
}
static int mt6360_charger_set_mivr(struct mt6360_chg_info *mci,
const union power_supply_propval *val)
{
u32 sel;
linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_VMIVR], val->intval, &sel);
return regmap_update_bits(mci->regmap,
MT6360_PMU_CHG_CTRL3,
MT6360_VMIVR_MASK,
sel << MT6360_VMIVR_SHFT);
}
static int mt6360_charger_set_iprechg(struct mt6360_chg_info *mci,
const union power_supply_propval *val)
{
u32 sel;
linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_IPREC], val->intval, &sel);
return regmap_update_bits(mci->regmap,
MT6360_PMU_CHG_CTRL8,
MT6360_IPREC_MASK,
sel << MT6360_IPREC_SHFT);
}
static int mt6360_charger_set_ieoc(struct mt6360_chg_info *mci,
const union power_supply_propval *val)
{
u32 sel;
linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_IEOC], val->intval, &sel);
return regmap_update_bits(mci->regmap,
MT6360_PMU_CHG_CTRL9,
MT6360_IEOC_MASK,
sel << MT6360_IEOC_SHFT);
}
static int mt6360_charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct mt6360_chg_info *mci = power_supply_get_drvdata(psy);
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
ret = mt6360_charger_get_online(mci, val);
break;
case POWER_SUPPLY_PROP_STATUS:
ret = mt6360_charger_get_status(mci, val);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
ret = mt6360_charger_get_charge_type(mci, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = mt6360_charger_get_ichg(mci, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
ret = mt6360_charger_get_max_ichg(mci, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = mt6360_charger_get_cv(mci, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
ret = mt6360_charger_get_max_cv(mci, val);
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = mt6360_charger_get_aicr(mci, val);
break;
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
ret = mt6360_charger_get_mivr(mci, val);
break;
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
ret = mt6360_charger_get_iprechg(mci, val);
break;
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
ret = mt6360_charger_get_ieoc(mci, val);
break;
case POWER_SUPPLY_PROP_USB_TYPE:
val->intval = mci->psy_usb_type;
break;
default:
ret = -ENODATA;
}
return ret;
}
static int mt6360_charger_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct mt6360_chg_info *mci = power_supply_get_drvdata(psy);
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
ret = mt6360_charger_set_online(mci, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = mt6360_charger_set_ichg(mci, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = mt6360_charger_set_cv(mci, val);
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = mt6360_charger_set_aicr(mci, val);
break;
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
ret = mt6360_charger_set_mivr(mci, val);
break;
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
ret = mt6360_charger_set_iprechg(mci, val);
break;
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
ret = mt6360_charger_set_ieoc(mci, val);
break;
default:
ret = -EINVAL;
}
return ret;
}
static int mt6360_charger_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return 1;
default:
return 0;
}
}
static enum power_supply_property mt6360_charger_properties[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
POWER_SUPPLY_PROP_USB_TYPE,
};
static const struct power_supply_desc mt6360_charger_desc = {
.type = POWER_SUPPLY_TYPE_USB,
.properties = mt6360_charger_properties,
.num_properties = ARRAY_SIZE(mt6360_charger_properties),
.get_property = mt6360_charger_get_property,
.set_property = mt6360_charger_set_property,
.property_is_writeable = mt6360_charger_property_is_writeable,
.usb_types = mt6360_charger_usb_types,
.num_usb_types = ARRAY_SIZE(mt6360_charger_usb_types),
};
static const struct regulator_ops mt6360_chg_otg_ops = {
.list_voltage = regulator_list_voltage_linear,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
static const struct regulator_desc mt6360_otg_rdesc = {
.of_match = "usb-otg-vbus",
.name = "usb-otg-vbus",
.ops = &mt6360_chg_otg_ops,
.owner = THIS_MODULE,
.type = REGULATOR_VOLTAGE,
.min_uV = 4425000,
.uV_step = 25000,
.n_voltages = 57,
.vsel_reg = MT6360_PMU_CHG_CTRL5,
.vsel_mask = MT6360_VOBST_MASK,
.enable_reg = MT6360_PMU_CHG_CTRL1,
.enable_mask = MT6360_OPA_MODE_MASK,
};
static irqreturn_t mt6360_pmu_attach_i_handler(int irq, void *data)
{
struct mt6360_chg_info *mci = data;
int ret;
unsigned int usb_status;
int last_usb_type;
mutex_lock(&mci->chgdet_lock);
if (!mci->bc12_en) {
dev_warn(mci->dev, "Received attach interrupt, bc12 disabled, ignore irq\n");
goto out;
}
last_usb_type = mci->psy_usb_type;
/* Plug in */
ret = regmap_read(mci->regmap, MT6360_PMU_USB_STATUS1, &usb_status);
if (ret < 0)
goto out;
usb_status &= MT6360_USB_STATUS_MASK;
usb_status >>= MT6360_USB_STATUS_SHFT;
switch (usb_status) {
case MT6360_CHG_TYPE_NOVBUS:
dev_dbg(mci->dev, "Received attach interrupt, no vbus\n");
goto out;
case MT6360_CHG_TYPE_UNDER_GOING:
dev_dbg(mci->dev, "Received attach interrupt, under going...\n");
goto out;
case MT6360_CHG_TYPE_SDP:
mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
break;
case MT6360_CHG_TYPE_SDPNSTD:
mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
break;
case MT6360_CHG_TYPE_CDP:
mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
break;
case MT6360_CHG_TYPE_DCP:
mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
break;
case MT6360_CHG_TYPE_DISABLE_BC12:
dev_dbg(mci->dev, "Received attach interrupt, bc12 detect not enable\n");
goto out;
default:
mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
dev_dbg(mci->dev, "Received attach interrupt, reserved address\n");
goto out;
}
dev_dbg(mci->dev, "Received attach interrupt, chg_type = %d\n", mci->psy_usb_type);
if (last_usb_type != mci->psy_usb_type)
power_supply_changed(mci->psy);
out:
mutex_unlock(&mci->chgdet_lock);
return IRQ_HANDLED;
}
static void mt6360_handle_chrdet_ext_evt(struct mt6360_chg_info *mci)
{
int ret;
bool pwr_rdy;
mutex_lock(&mci->chgdet_lock);
ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
if (ret < 0)
goto out;
if (mci->pwr_rdy == pwr_rdy) {
dev_dbg(mci->dev, "Received vbus interrupt, pwr_rdy is same(%d)\n", pwr_rdy);
goto out;
}
mci->pwr_rdy = pwr_rdy;
dev_dbg(mci->dev, "Received vbus interrupt, pwr_rdy = %d\n", pwr_rdy);
if (!pwr_rdy) {
mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
power_supply_changed(mci->psy);
}
ret = regmap_update_bits(mci->regmap,
MT6360_PMU_DEVICE_TYPE,
MT6360_USBCHGEN_MASK,
pwr_rdy ? MT6360_USBCHGEN_MASK : 0);
if (ret < 0)
goto out;
mci->bc12_en = pwr_rdy;
out:
mutex_unlock(&mci->chgdet_lock);
}
static void mt6360_chrdet_work(struct work_struct *work)
{
struct mt6360_chg_info *mci = (struct mt6360_chg_info *)container_of(
work, struct mt6360_chg_info, chrdet_work);
mt6360_handle_chrdet_ext_evt(mci);
}
static irqreturn_t mt6360_pmu_chrdet_ext_evt_handler(int irq, void *data)
{
struct mt6360_chg_info *mci = data;
mt6360_handle_chrdet_ext_evt(mci);
return IRQ_HANDLED;
}
static int mt6360_chg_irq_register(struct platform_device *pdev)
{
const struct {
const char *name;
irq_handler_t handler;
} irq_descs[] = {
{ "attach_i", mt6360_pmu_attach_i_handler },
{ "chrdet_ext_evt", mt6360_pmu_chrdet_ext_evt_handler }
};
int i, ret;
for (i = 0; i < ARRAY_SIZE(irq_descs); i++) {
ret = platform_get_irq_byname(pdev, irq_descs[i].name);
if (ret < 0)
return ret;
ret = devm_request_threaded_irq(&pdev->dev, ret, NULL,
irq_descs[i].handler,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
irq_descs[i].name,
platform_get_drvdata(pdev));
if (ret < 0)
return dev_err_probe(&pdev->dev, ret, "Failed to request %s irq\n",
irq_descs[i].name);
}
return 0;
}
static u32 mt6360_vinovp_trans_to_sel(u32 val)
{
u32 vinovp_tbl[] = { 5500000, 6500000, 11000000, 14500000 };
int i;
/* Select the smaller and equal supported value */
for (i = 0; i < ARRAY_SIZE(vinovp_tbl)-1; i++) {
if (val < vinovp_tbl[i+1])
break;
}
return i;
}
static int mt6360_chg_init_setting(struct mt6360_chg_info *mci)
{
int ret;
u32 sel;
sel = mt6360_vinovp_trans_to_sel(mci->vinovp);
ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL19,
MT6360_VINOVP_MASK, sel << MT6360_VINOVP_SHFT);
if (ret)
return dev_err_probe(mci->dev, ret, "%s: Failed to apply vinovp\n", __func__);
ret = regmap_update_bits(mci->regmap, MT6360_PMU_DEVICE_TYPE,
MT6360_USBCHGEN_MASK, 0);
if (ret)
return dev_err_probe(mci->dev, ret, "%s: Failed to disable bc12\n", __func__);
ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL2,
MT6360_IINLMTSEL_MASK,
MT6360_IINLMTSEL_AICR <<
MT6360_IINLMTSEL_SHFT);
if (ret)
return dev_err_probe(mci->dev, ret,
"%s: Failed to switch iinlmtsel to aicr\n", __func__);
usleep_range(5000, 6000);
ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL3,
MT6360_ILIM_EN_MASK, 0);
if (ret)
return dev_err_probe(mci->dev, ret,
"%s: Failed to disable ilim\n", __func__);
ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL10,
MT6360_OTG_OC_MASK, MT6360_OTG_OC_MASK);
if (ret)
return dev_err_probe(mci->dev, ret,
"%s: Failed to config otg oc to 3A\n", __func__);
return 0;
}
static int mt6360_charger_probe(struct platform_device *pdev)
{
struct mt6360_chg_info *mci;
struct power_supply_config charger_cfg = {};
struct regulator_config config = { };
int ret;
mci = devm_kzalloc(&pdev->dev, sizeof(*mci), GFP_KERNEL);
if (!mci)
return -ENOMEM;
mci->dev = &pdev->dev;
mci->vinovp = 6500000;
mutex_init(&mci->chgdet_lock);
platform_set_drvdata(pdev, mci);
ret = devm_work_autocancel(&pdev->dev, &mci->chrdet_work, mt6360_chrdet_work);
if (ret)
return dev_err_probe(&pdev->dev, ret, "Failed to set delayed work\n");
ret = device_property_read_u32(&pdev->dev, "richtek,vinovp-microvolt", &mci->vinovp);
if (ret)
dev_warn(&pdev->dev, "Failed to parse vinovp in DT, keep default 6.5v\n");
mci->regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!mci->regmap)
return dev_err_probe(&pdev->dev, -ENODEV, "Failed to get parent regmap\n");
ret = mt6360_chg_init_setting(mci);
if (ret)
return dev_err_probe(&pdev->dev, ret, "Failed to initial setting\n");
memcpy(&mci->psy_desc, &mt6360_charger_desc, sizeof(mci->psy_desc));
mci->psy_desc.name = dev_name(&pdev->dev);
charger_cfg.drv_data = mci;
charger_cfg.of_node = pdev->dev.of_node;
mci->psy = devm_power_supply_register(&pdev->dev,
&mci->psy_desc, &charger_cfg);
if (IS_ERR(mci->psy))
return dev_err_probe(&pdev->dev, PTR_ERR(mci->psy),
"Failed to register power supply dev\n");
ret = mt6360_chg_irq_register(pdev);
if (ret)
return dev_err_probe(&pdev->dev, ret, "Failed to register irqs\n");
config.dev = &pdev->dev;
config.regmap = mci->regmap;
mci->otg_rdev = devm_regulator_register(&pdev->dev, &mt6360_otg_rdesc,
&config);
if (IS_ERR(mci->otg_rdev))
return PTR_ERR(mci->otg_rdev);
schedule_work(&mci->chrdet_work);
return 0;
}
static const struct of_device_id __maybe_unused mt6360_charger_of_id[] = {
{ .compatible = "mediatek,mt6360-chg", },
{},
};
MODULE_DEVICE_TABLE(of, mt6360_charger_of_id);
static const struct platform_device_id mt6360_charger_id[] = {
{ "mt6360-chg", 0 },
{},
};
MODULE_DEVICE_TABLE(platform, mt6360_charger_id);
static struct platform_driver mt6360_charger_driver = {
.driver = {
.name = "mt6360-chg",
.of_match_table = of_match_ptr(mt6360_charger_of_id),
},
.probe = mt6360_charger_probe,
.id_table = mt6360_charger_id,
};
module_platform_driver(mt6360_charger_driver);
MODULE_AUTHOR("Gene Chen <[email protected]>");
MODULE_DESCRIPTION("MT6360 Charger Driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/mt6360_charger.c |
// SPDX-License-Identifier: GPL-2.0
// Battery charger driver for TI's tps65217
//
// Copyright (C) 2015 Collabora Ltd.
// Author: Enric Balletbo i Serra <[email protected]>
/*
* Battery charger driver for TI's tps65217
*/
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/power_supply.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps65217.h>
#define CHARGER_STATUS_PRESENT (TPS65217_STATUS_ACPWR | TPS65217_STATUS_USBPWR)
#define NUM_CHARGER_IRQS 2
#define POLL_INTERVAL (HZ * 2)
struct tps65217_charger {
struct tps65217 *tps;
struct device *dev;
struct power_supply *psy;
int online;
int prev_online;
struct task_struct *poll_task;
};
static enum power_supply_property tps65217_charger_props[] = {
POWER_SUPPLY_PROP_ONLINE,
};
static int tps65217_config_charger(struct tps65217_charger *charger)
{
int ret;
/*
* tps65217 rev. G, p. 31 (see p. 32 for NTC schematic)
*
* The device can be configured to support a 100k NTC (B = 3960) by
* setting the NTC_TYPE bit in register CHGCONFIG1 to 1. However it
* is not recommended to do so. In sleep mode, the charger continues
* charging the battery, but all register values are reset to default
* values. Therefore, the charger would get the wrong temperature
* information. If 100k NTC setting is required, please contact the
* factory.
*
* ATTENTION, conflicting information, from p. 46
*
* NTC TYPE (for battery temperature measurement)
* 0 – 100k (curve 1, B = 3960)
* 1 – 10k (curve 2, B = 3480) (default on reset)
*
*/
ret = tps65217_clear_bits(charger->tps, TPS65217_REG_CHGCONFIG1,
TPS65217_CHGCONFIG1_NTC_TYPE,
TPS65217_PROTECT_NONE);
if (ret) {
dev_err(charger->dev,
"failed to set 100k NTC setting: %d\n", ret);
return ret;
}
return 0;
}
static int tps65217_enable_charging(struct tps65217_charger *charger)
{
int ret;
/* charger already enabled */
if (charger->online)
return 0;
dev_dbg(charger->dev, "%s: enable charging\n", __func__);
ret = tps65217_set_bits(charger->tps, TPS65217_REG_CHGCONFIG1,
TPS65217_CHGCONFIG1_CHG_EN,
TPS65217_CHGCONFIG1_CHG_EN,
TPS65217_PROTECT_NONE);
if (ret) {
dev_err(charger->dev,
"%s: Error in writing CHG_EN in reg 0x%x: %d\n",
__func__, TPS65217_REG_CHGCONFIG1, ret);
return ret;
}
charger->online = 1;
return 0;
}
static int tps65217_charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct tps65217_charger *charger = power_supply_get_drvdata(psy);
if (psp == POWER_SUPPLY_PROP_ONLINE) {
val->intval = charger->online;
return 0;
}
return -EINVAL;
}
static irqreturn_t tps65217_charger_irq(int irq, void *dev)
{
int ret, val;
struct tps65217_charger *charger = dev;
charger->prev_online = charger->online;
ret = tps65217_reg_read(charger->tps, TPS65217_REG_STATUS, &val);
if (ret < 0) {
dev_err(charger->dev, "%s: Error in reading reg 0x%x\n",
__func__, TPS65217_REG_STATUS);
return IRQ_HANDLED;
}
dev_dbg(charger->dev, "%s: 0x%x\n", __func__, val);
/* check for charger status bit */
if (val & CHARGER_STATUS_PRESENT) {
ret = tps65217_enable_charging(charger);
if (ret) {
dev_err(charger->dev,
"failed to enable charger: %d\n", ret);
return IRQ_HANDLED;
}
} else {
charger->online = 0;
}
if (charger->prev_online != charger->online)
power_supply_changed(charger->psy);
ret = tps65217_reg_read(charger->tps, TPS65217_REG_CHGCONFIG0, &val);
if (ret < 0) {
dev_err(charger->dev, "%s: Error in reading reg 0x%x\n",
__func__, TPS65217_REG_CHGCONFIG0);
return IRQ_HANDLED;
}
if (val & TPS65217_CHGCONFIG0_ACTIVE)
dev_dbg(charger->dev, "%s: charger is charging\n", __func__);
else
dev_dbg(charger->dev,
"%s: charger is NOT charging\n", __func__);
return IRQ_HANDLED;
}
static int tps65217_charger_poll_task(void *data)
{
set_freezable();
while (!kthread_should_stop()) {
schedule_timeout_interruptible(POLL_INTERVAL);
try_to_freeze();
tps65217_charger_irq(-1, data);
}
return 0;
}
static const struct power_supply_desc tps65217_charger_desc = {
.name = "tps65217-charger",
.type = POWER_SUPPLY_TYPE_MAINS,
.get_property = tps65217_charger_get_property,
.properties = tps65217_charger_props,
.num_properties = ARRAY_SIZE(tps65217_charger_props),
};
static int tps65217_charger_probe(struct platform_device *pdev)
{
struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
struct tps65217_charger *charger;
struct power_supply_config cfg = {};
struct task_struct *poll_task;
int irq[NUM_CHARGER_IRQS];
int ret;
int i;
charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
if (!charger)
return -ENOMEM;
platform_set_drvdata(pdev, charger);
charger->tps = tps;
charger->dev = &pdev->dev;
cfg.of_node = pdev->dev.of_node;
cfg.drv_data = charger;
charger->psy = devm_power_supply_register(&pdev->dev,
&tps65217_charger_desc,
&cfg);
if (IS_ERR(charger->psy)) {
dev_err(&pdev->dev, "failed: power supply register\n");
return PTR_ERR(charger->psy);
}
irq[0] = platform_get_irq_byname(pdev, "USB");
irq[1] = platform_get_irq_byname(pdev, "AC");
ret = tps65217_config_charger(charger);
if (ret < 0) {
dev_err(charger->dev, "charger config failed, err %d\n", ret);
return ret;
}
/* Create a polling thread if an interrupt is invalid */
if (irq[0] < 0 || irq[1] < 0) {
poll_task = kthread_run(tps65217_charger_poll_task,
charger, "ktps65217charger");
if (IS_ERR(poll_task)) {
ret = PTR_ERR(poll_task);
dev_err(charger->dev,
"Unable to run kthread err %d\n", ret);
return ret;
}
charger->poll_task = poll_task;
return 0;
}
/* Create IRQ threads for charger interrupts */
for (i = 0; i < NUM_CHARGER_IRQS; i++) {
ret = devm_request_threaded_irq(&pdev->dev, irq[i], NULL,
tps65217_charger_irq,
IRQF_ONESHOT, "tps65217-charger",
charger);
if (ret) {
dev_err(charger->dev,
"Unable to register irq %d err %d\n", irq[i],
ret);
return ret;
}
/* Check current state */
tps65217_charger_irq(-1, charger);
}
return 0;
}
static int tps65217_charger_remove(struct platform_device *pdev)
{
struct tps65217_charger *charger = platform_get_drvdata(pdev);
if (charger->poll_task)
kthread_stop(charger->poll_task);
return 0;
}
static const struct of_device_id tps65217_charger_match_table[] = {
{ .compatible = "ti,tps65217-charger", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, tps65217_charger_match_table);
static struct platform_driver tps65217_charger_driver = {
.probe = tps65217_charger_probe,
.remove = tps65217_charger_remove,
.driver = {
.name = "tps65217-charger",
.of_match_table = of_match_ptr(tps65217_charger_match_table),
},
};
module_platform_driver(tps65217_charger_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Enric Balletbo Serra <[email protected]>");
MODULE_DESCRIPTION("TPS65217 battery charger driver");
| linux-master | drivers/power/supply/tps65217_charger.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Fuel gauge driver for Richtek RT5033
*
* Copyright (C) 2014 Samsung Electronics, Co., Ltd.
* Author: Beomho Seo <[email protected]>
*/
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/mfd/rt5033-private.h>
struct rt5033_battery {
struct i2c_client *client;
struct regmap *regmap;
struct power_supply *psy;
};
static int rt5033_battery_get_status(struct i2c_client *client)
{
struct rt5033_battery *battery = i2c_get_clientdata(client);
union power_supply_propval val;
int ret;
ret = power_supply_get_property_from_supplier(battery->psy,
POWER_SUPPLY_PROP_STATUS,
&val);
if (ret)
val.intval = POWER_SUPPLY_STATUS_UNKNOWN;
return val.intval;
}
static int rt5033_battery_get_capacity(struct i2c_client *client)
{
struct rt5033_battery *battery = i2c_get_clientdata(client);
u32 msb;
regmap_read(battery->regmap, RT5033_FUEL_REG_SOC_H, &msb);
return msb;
}
static int rt5033_battery_get_present(struct i2c_client *client)
{
struct rt5033_battery *battery = i2c_get_clientdata(client);
u32 val;
regmap_read(battery->regmap, RT5033_FUEL_REG_CONFIG_L, &val);
return (val & RT5033_FUEL_BAT_PRESENT) ? true : false;
}
static int rt5033_battery_get_watt_prop(struct i2c_client *client,
enum power_supply_property psp)
{
struct rt5033_battery *battery = i2c_get_clientdata(client);
unsigned int regh, regl;
int ret;
u32 msb, lsb;
switch (psp) {
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
regh = RT5033_FUEL_REG_VBAT_H;
regl = RT5033_FUEL_REG_VBAT_L;
break;
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
regh = RT5033_FUEL_REG_AVG_VOLT_H;
regl = RT5033_FUEL_REG_AVG_VOLT_L;
break;
case POWER_SUPPLY_PROP_VOLTAGE_OCV:
regh = RT5033_FUEL_REG_OCV_H;
regl = RT5033_FUEL_REG_OCV_L;
break;
default:
return -EINVAL;
}
regmap_read(battery->regmap, regh, &msb);
regmap_read(battery->regmap, regl, &lsb);
ret = ((msb << 4) + (lsb >> 4)) * 1250;
return ret;
}
static int rt5033_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct rt5033_battery *battery = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
case POWER_SUPPLY_PROP_VOLTAGE_OCV:
val->intval = rt5033_battery_get_watt_prop(battery->client,
psp);
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = rt5033_battery_get_present(battery->client);
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = rt5033_battery_get_capacity(battery->client);
break;
case POWER_SUPPLY_PROP_STATUS:
val->intval = rt5033_battery_get_status(battery->client);
break;
default:
return -EINVAL;
}
return 0;
}
static enum power_supply_property rt5033_battery_props[] = {
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_VOLTAGE_OCV,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_STATUS,
};
static const struct regmap_config rt5033_battery_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = RT5033_FUEL_REG_END,
};
static const struct power_supply_desc rt5033_battery_desc = {
.name = "rt5033-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.get_property = rt5033_battery_get_property,
.properties = rt5033_battery_props,
.num_properties = ARRAY_SIZE(rt5033_battery_props),
};
static int rt5033_battery_probe(struct i2c_client *client)
{
struct i2c_adapter *adapter = client->adapter;
struct power_supply_config psy_cfg = {};
struct rt5033_battery *battery;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
return -EIO;
battery = devm_kzalloc(&client->dev, sizeof(*battery), GFP_KERNEL);
if (!battery)
return -ENOMEM;
battery->client = client;
battery->regmap = devm_regmap_init_i2c(client,
&rt5033_battery_regmap_config);
if (IS_ERR(battery->regmap)) {
dev_err(&client->dev, "Failed to initialize regmap\n");
return -EINVAL;
}
i2c_set_clientdata(client, battery);
psy_cfg.of_node = client->dev.of_node;
psy_cfg.drv_data = battery;
battery->psy = power_supply_register(&client->dev,
&rt5033_battery_desc, &psy_cfg);
if (IS_ERR(battery->psy))
return dev_err_probe(&client->dev, PTR_ERR(battery->psy),
"Failed to register power supply\n");
return 0;
}
static void rt5033_battery_remove(struct i2c_client *client)
{
struct rt5033_battery *battery = i2c_get_clientdata(client);
power_supply_unregister(battery->psy);
}
static const struct i2c_device_id rt5033_battery_id[] = {
{ "rt5033-battery", },
{ }
};
MODULE_DEVICE_TABLE(i2c, rt5033_battery_id);
static const struct of_device_id rt5033_battery_of_match[] = {
{ .compatible = "richtek,rt5033-battery", },
{ }
};
MODULE_DEVICE_TABLE(of, rt5033_battery_of_match);
static struct i2c_driver rt5033_battery_driver = {
.driver = {
.name = "rt5033-battery",
.of_match_table = rt5033_battery_of_match,
},
.probe = rt5033_battery_probe,
.remove = rt5033_battery_remove,
.id_table = rt5033_battery_id,
};
module_i2c_driver(rt5033_battery_driver);
MODULE_DESCRIPTION("Richtek RT5033 fuel gauge driver");
MODULE_AUTHOR("Beomho Seo <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/rt5033_battery.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Battery charger driver for Dialog Semiconductor DA9030
*
* Copyright (C) 2008 Compulab, Ltd.
* Mike Rapoport <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/workqueue.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/mfd/da903x.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/notifier.h>
#define DA9030_FAULT_LOG 0x0a
#define DA9030_FAULT_LOG_OVER_TEMP (1 << 7)
#define DA9030_FAULT_LOG_VBAT_OVER (1 << 4)
#define DA9030_CHARGE_CONTROL 0x28
#define DA9030_CHRG_CHARGER_ENABLE (1 << 7)
#define DA9030_ADC_MAN_CONTROL 0x30
#define DA9030_ADC_TBATREF_ENABLE (1 << 5)
#define DA9030_ADC_LDO_INT_ENABLE (1 << 4)
#define DA9030_ADC_AUTO_CONTROL 0x31
#define DA9030_ADC_TBAT_ENABLE (1 << 5)
#define DA9030_ADC_VBAT_IN_TXON (1 << 4)
#define DA9030_ADC_VCH_ENABLE (1 << 3)
#define DA9030_ADC_ICH_ENABLE (1 << 2)
#define DA9030_ADC_VBAT_ENABLE (1 << 1)
#define DA9030_ADC_AUTO_SLEEP_ENABLE (1 << 0)
#define DA9030_VBATMON 0x32
#define DA9030_VBATMONTXON 0x33
#define DA9030_TBATHIGHP 0x34
#define DA9030_TBATHIGHN 0x35
#define DA9030_TBATLOW 0x36
#define DA9030_VBAT_RES 0x41
#define DA9030_VBATMIN_RES 0x42
#define DA9030_VBATMINTXON_RES 0x43
#define DA9030_ICHMAX_RES 0x44
#define DA9030_ICHMIN_RES 0x45
#define DA9030_ICHAVERAGE_RES 0x46
#define DA9030_VCHMAX_RES 0x47
#define DA9030_VCHMIN_RES 0x48
#define DA9030_TBAT_RES 0x49
struct da9030_adc_res {
uint8_t vbat_res;
uint8_t vbatmin_res;
uint8_t vbatmintxon;
uint8_t ichmax_res;
uint8_t ichmin_res;
uint8_t ichaverage_res;
uint8_t vchmax_res;
uint8_t vchmin_res;
uint8_t tbat_res;
uint8_t adc_in4_res;
uint8_t adc_in5_res;
};
struct da9030_battery_thresholds {
int tbat_low;
int tbat_high;
int tbat_restart;
int vbat_low;
int vbat_crit;
int vbat_charge_start;
int vbat_charge_stop;
int vbat_charge_restart;
int vcharge_min;
int vcharge_max;
};
struct da9030_charger {
struct power_supply *psy;
struct power_supply_desc psy_desc;
struct device *master;
struct da9030_adc_res adc;
struct delayed_work work;
unsigned int interval;
struct power_supply_info *battery_info;
struct da9030_battery_thresholds thresholds;
unsigned int charge_milliamp;
unsigned int charge_millivolt;
/* charger status */
bool chdet;
uint8_t fault;
int mA;
int mV;
bool is_on;
struct notifier_block nb;
/* platform callbacks for battery low and critical events */
void (*battery_low)(void);
void (*battery_critical)(void);
struct dentry *debug_file;
};
static inline int da9030_reg_to_mV(int reg)
{
return ((reg * 2650) >> 8) + 2650;
}
static inline int da9030_millivolt_to_reg(int mV)
{
return ((mV - 2650) << 8) / 2650;
}
static inline int da9030_reg_to_mA(int reg)
{
return ((reg * 24000) >> 8) / 15;
}
#ifdef CONFIG_DEBUG_FS
static int bat_debug_show(struct seq_file *s, void *data)
{
struct da9030_charger *charger = s->private;
seq_printf(s, "charger is %s\n", charger->is_on ? "on" : "off");
if (charger->chdet) {
seq_printf(s, "iset = %dmA, vset = %dmV\n",
charger->mA, charger->mV);
}
seq_printf(s, "vbat_res = %d (%dmV)\n",
charger->adc.vbat_res,
da9030_reg_to_mV(charger->adc.vbat_res));
seq_printf(s, "vbatmin_res = %d (%dmV)\n",
charger->adc.vbatmin_res,
da9030_reg_to_mV(charger->adc.vbatmin_res));
seq_printf(s, "vbatmintxon = %d (%dmV)\n",
charger->adc.vbatmintxon,
da9030_reg_to_mV(charger->adc.vbatmintxon));
seq_printf(s, "ichmax_res = %d (%dmA)\n",
charger->adc.ichmax_res,
da9030_reg_to_mV(charger->adc.ichmax_res));
seq_printf(s, "ichmin_res = %d (%dmA)\n",
charger->adc.ichmin_res,
da9030_reg_to_mA(charger->adc.ichmin_res));
seq_printf(s, "ichaverage_res = %d (%dmA)\n",
charger->adc.ichaverage_res,
da9030_reg_to_mA(charger->adc.ichaverage_res));
seq_printf(s, "vchmax_res = %d (%dmV)\n",
charger->adc.vchmax_res,
da9030_reg_to_mA(charger->adc.vchmax_res));
seq_printf(s, "vchmin_res = %d (%dmV)\n",
charger->adc.vchmin_res,
da9030_reg_to_mV(charger->adc.vchmin_res));
return 0;
}
DEFINE_SHOW_ATTRIBUTE(bat_debug);
static struct dentry *da9030_bat_create_debugfs(struct da9030_charger *charger)
{
charger->debug_file = debugfs_create_file("charger", 0666, NULL,
charger, &bat_debug_fops);
return charger->debug_file;
}
static void da9030_bat_remove_debugfs(struct da9030_charger *charger)
{
debugfs_remove(charger->debug_file);
}
#else
static inline struct dentry *da9030_bat_create_debugfs(struct da9030_charger *charger)
{
return NULL;
}
static inline void da9030_bat_remove_debugfs(struct da9030_charger *charger)
{
}
#endif
static inline void da9030_read_adc(struct da9030_charger *charger,
struct da9030_adc_res *adc)
{
da903x_reads(charger->master, DA9030_VBAT_RES,
sizeof(*adc), (uint8_t *)adc);
}
static void da9030_charger_update_state(struct da9030_charger *charger)
{
uint8_t val;
da903x_read(charger->master, DA9030_CHARGE_CONTROL, &val);
charger->is_on = (val & DA9030_CHRG_CHARGER_ENABLE) ? 1 : 0;
charger->mA = ((val >> 3) & 0xf) * 100;
charger->mV = (val & 0x7) * 50 + 4000;
da9030_read_adc(charger, &charger->adc);
da903x_read(charger->master, DA9030_FAULT_LOG, &charger->fault);
charger->chdet = da903x_query_status(charger->master,
DA9030_STATUS_CHDET);
}
static void da9030_set_charge(struct da9030_charger *charger, int on)
{
uint8_t val;
if (on) {
val = DA9030_CHRG_CHARGER_ENABLE;
val |= (charger->charge_milliamp / 100) << 3;
val |= (charger->charge_millivolt - 4000) / 50;
charger->is_on = 1;
} else {
val = 0;
charger->is_on = 0;
}
da903x_write(charger->master, DA9030_CHARGE_CONTROL, val);
power_supply_changed(charger->psy);
}
static void da9030_charger_check_state(struct da9030_charger *charger)
{
da9030_charger_update_state(charger);
/* we wake or boot with external power on */
if (!charger->is_on) {
if ((charger->chdet) &&
(charger->adc.vbat_res <
charger->thresholds.vbat_charge_start)) {
da9030_set_charge(charger, 1);
}
} else {
/* Charger has been pulled out */
if (!charger->chdet) {
da9030_set_charge(charger, 0);
return;
}
if (charger->adc.vbat_res >=
charger->thresholds.vbat_charge_stop) {
da9030_set_charge(charger, 0);
da903x_write(charger->master, DA9030_VBATMON,
charger->thresholds.vbat_charge_restart);
} else if (charger->adc.vbat_res >
charger->thresholds.vbat_low) {
/* we are charging and passed LOW_THRESH,
so upate DA9030 VBAT threshold
*/
da903x_write(charger->master, DA9030_VBATMON,
charger->thresholds.vbat_low);
}
if (charger->adc.vchmax_res > charger->thresholds.vcharge_max ||
charger->adc.vchmin_res < charger->thresholds.vcharge_min ||
/* Tempreture readings are negative */
charger->adc.tbat_res < charger->thresholds.tbat_high ||
charger->adc.tbat_res > charger->thresholds.tbat_low) {
/* disable charger */
da9030_set_charge(charger, 0);
}
}
}
static void da9030_charging_monitor(struct work_struct *work)
{
struct da9030_charger *charger;
charger = container_of(work, struct da9030_charger, work.work);
da9030_charger_check_state(charger);
/* reschedule for the next time */
schedule_delayed_work(&charger->work, charger->interval);
}
static enum power_supply_property da9030_battery_props[] = {
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
};
static void da9030_battery_check_status(struct da9030_charger *charger,
union power_supply_propval *val)
{
if (charger->chdet) {
if (charger->is_on)
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
} else {
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
}
}
static void da9030_battery_check_health(struct da9030_charger *charger,
union power_supply_propval *val)
{
if (charger->fault & DA9030_FAULT_LOG_OVER_TEMP)
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
else if (charger->fault & DA9030_FAULT_LOG_VBAT_OVER)
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
else
val->intval = POWER_SUPPLY_HEALTH_GOOD;
}
static int da9030_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct da9030_charger *charger = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
da9030_battery_check_status(charger, val);
break;
case POWER_SUPPLY_PROP_HEALTH:
da9030_battery_check_health(charger, val);
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = charger->battery_info->technology;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
val->intval = charger->battery_info->voltage_max_design;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
val->intval = charger->battery_info->voltage_min_design;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = da9030_reg_to_mV(charger->adc.vbat_res) * 1000;
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
val->intval =
da9030_reg_to_mA(charger->adc.ichaverage_res) * 1000;
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = charger->battery_info->name;
break;
default:
break;
}
return 0;
}
static void da9030_battery_vbat_event(struct da9030_charger *charger)
{
da9030_read_adc(charger, &charger->adc);
if (charger->is_on)
return;
if (charger->adc.vbat_res < charger->thresholds.vbat_low) {
/* set VBAT threshold for critical */
da903x_write(charger->master, DA9030_VBATMON,
charger->thresholds.vbat_crit);
if (charger->battery_low)
charger->battery_low();
} else if (charger->adc.vbat_res <
charger->thresholds.vbat_crit) {
/* notify the system of battery critical */
if (charger->battery_critical)
charger->battery_critical();
}
}
static int da9030_battery_event(struct notifier_block *nb, unsigned long event,
void *data)
{
struct da9030_charger *charger =
container_of(nb, struct da9030_charger, nb);
switch (event) {
case DA9030_EVENT_CHDET:
cancel_delayed_work_sync(&charger->work);
schedule_work(&charger->work.work);
break;
case DA9030_EVENT_VBATMON:
da9030_battery_vbat_event(charger);
break;
case DA9030_EVENT_CHIOVER:
case DA9030_EVENT_TBAT:
da9030_set_charge(charger, 0);
break;
}
return 0;
}
static void da9030_battery_convert_thresholds(struct da9030_charger *charger,
struct da9030_battery_info *pdata)
{
charger->thresholds.tbat_low = pdata->tbat_low;
charger->thresholds.tbat_high = pdata->tbat_high;
charger->thresholds.tbat_restart = pdata->tbat_restart;
charger->thresholds.vbat_low =
da9030_millivolt_to_reg(pdata->vbat_low);
charger->thresholds.vbat_crit =
da9030_millivolt_to_reg(pdata->vbat_crit);
charger->thresholds.vbat_charge_start =
da9030_millivolt_to_reg(pdata->vbat_charge_start);
charger->thresholds.vbat_charge_stop =
da9030_millivolt_to_reg(pdata->vbat_charge_stop);
charger->thresholds.vbat_charge_restart =
da9030_millivolt_to_reg(pdata->vbat_charge_restart);
charger->thresholds.vcharge_min =
da9030_millivolt_to_reg(pdata->vcharge_min);
charger->thresholds.vcharge_max =
da9030_millivolt_to_reg(pdata->vcharge_max);
}
static void da9030_battery_setup_psy(struct da9030_charger *charger)
{
struct power_supply_desc *psy_desc = &charger->psy_desc;
struct power_supply_info *info = charger->battery_info;
psy_desc->name = info->name;
psy_desc->use_for_apm = info->use_for_apm;
psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
psy_desc->get_property = da9030_battery_get_property;
psy_desc->properties = da9030_battery_props;
psy_desc->num_properties = ARRAY_SIZE(da9030_battery_props);
};
static int da9030_battery_charger_init(struct da9030_charger *charger)
{
char v[5];
int ret;
v[0] = v[1] = charger->thresholds.vbat_low;
v[2] = charger->thresholds.tbat_high;
v[3] = charger->thresholds.tbat_restart;
v[4] = charger->thresholds.tbat_low;
ret = da903x_writes(charger->master, DA9030_VBATMON, 5, v);
if (ret)
return ret;
/*
* Enable reference voltage supply for ADC from the LDO_INTERNAL
* regulator. Must be set before ADC measurements can be made.
*/
ret = da903x_write(charger->master, DA9030_ADC_MAN_CONTROL,
DA9030_ADC_LDO_INT_ENABLE |
DA9030_ADC_TBATREF_ENABLE);
if (ret)
return ret;
/* enable auto ADC measuremnts */
return da903x_write(charger->master, DA9030_ADC_AUTO_CONTROL,
DA9030_ADC_TBAT_ENABLE | DA9030_ADC_VBAT_IN_TXON |
DA9030_ADC_VCH_ENABLE | DA9030_ADC_ICH_ENABLE |
DA9030_ADC_VBAT_ENABLE |
DA9030_ADC_AUTO_SLEEP_ENABLE);
}
static int da9030_battery_probe(struct platform_device *pdev)
{
struct da9030_charger *charger;
struct power_supply_config psy_cfg = {};
struct da9030_battery_info *pdata = pdev->dev.platform_data;
int ret;
if (pdata == NULL)
return -EINVAL;
if (pdata->charge_milliamp >= 1500 ||
pdata->charge_millivolt < 4000 ||
pdata->charge_millivolt > 4350)
return -EINVAL;
charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
if (charger == NULL)
return -ENOMEM;
charger->master = pdev->dev.parent;
/* 10 seconds between monitor runs unless platform defines other
interval */
charger->interval = msecs_to_jiffies(
(pdata->batmon_interval ? : 10) * 1000);
charger->charge_milliamp = pdata->charge_milliamp;
charger->charge_millivolt = pdata->charge_millivolt;
charger->battery_info = pdata->battery_info;
charger->battery_low = pdata->battery_low;
charger->battery_critical = pdata->battery_critical;
da9030_battery_convert_thresholds(charger, pdata);
ret = da9030_battery_charger_init(charger);
if (ret)
goto err_charger_init;
INIT_DELAYED_WORK(&charger->work, da9030_charging_monitor);
schedule_delayed_work(&charger->work, charger->interval);
charger->nb.notifier_call = da9030_battery_event;
ret = da903x_register_notifier(charger->master, &charger->nb,
DA9030_EVENT_CHDET |
DA9030_EVENT_VBATMON |
DA9030_EVENT_CHIOVER |
DA9030_EVENT_TBAT);
if (ret)
goto err_notifier;
da9030_battery_setup_psy(charger);
psy_cfg.drv_data = charger;
charger->psy = power_supply_register(&pdev->dev, &charger->psy_desc,
&psy_cfg);
if (IS_ERR(charger->psy)) {
ret = PTR_ERR(charger->psy);
goto err_ps_register;
}
charger->debug_file = da9030_bat_create_debugfs(charger);
platform_set_drvdata(pdev, charger);
return 0;
err_ps_register:
da903x_unregister_notifier(charger->master, &charger->nb,
DA9030_EVENT_CHDET | DA9030_EVENT_VBATMON |
DA9030_EVENT_CHIOVER | DA9030_EVENT_TBAT);
err_notifier:
cancel_delayed_work(&charger->work);
err_charger_init:
return ret;
}
static int da9030_battery_remove(struct platform_device *dev)
{
struct da9030_charger *charger = platform_get_drvdata(dev);
da9030_bat_remove_debugfs(charger);
da903x_unregister_notifier(charger->master, &charger->nb,
DA9030_EVENT_CHDET | DA9030_EVENT_VBATMON |
DA9030_EVENT_CHIOVER | DA9030_EVENT_TBAT);
cancel_delayed_work_sync(&charger->work);
da9030_set_charge(charger, 0);
power_supply_unregister(charger->psy);
return 0;
}
static struct platform_driver da903x_battery_driver = {
.driver = {
.name = "da903x-battery",
},
.probe = da9030_battery_probe,
.remove = da9030_battery_remove,
};
module_platform_driver(da903x_battery_driver);
MODULE_DESCRIPTION("DA9030 battery charger driver");
MODULE_AUTHOR("Mike Rapoport, CompuLab");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/da9030_battery.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Nokia RX-51 battery driver
*
* Copyright (C) 2012 Pali Rohár <[email protected]>
*/
#include <linux/module.h>
#include <linux/param.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
#include <linux/iio/consumer.h>
#include <linux/of.h>
struct rx51_device_info {
struct device *dev;
struct power_supply *bat;
struct power_supply_desc bat_desc;
struct iio_channel *channel_temp;
struct iio_channel *channel_bsi;
struct iio_channel *channel_vbat;
};
/*
* Read ADCIN channel value, code copied from maemo kernel
*/
static int rx51_battery_read_adc(struct iio_channel *channel)
{
int val, err;
err = iio_read_channel_average_raw(channel, &val);
if (err < 0)
return err;
return val;
}
/*
* Read ADCIN channel 12 (voltage) and convert RAW value to micro voltage
* This conversion formula was extracted from maemo program bsi-read
*/
static int rx51_battery_read_voltage(struct rx51_device_info *di)
{
int voltage = rx51_battery_read_adc(di->channel_vbat);
if (voltage < 0) {
dev_err(di->dev, "Could not read ADC: %d\n", voltage);
return voltage;
}
return 1000 * (10000 * voltage / 1705);
}
/*
* Temperature look-up tables
* TEMP = (1/(t1 + 1/298) - 273.15)
* Where t1 = (1/B) * ln((RAW_ADC_U * 2.5)/(R * I * 255))
* Formula is based on experimental data, RX-51 CAL data, maemo program bme
* and formula from da9052 driver with values R = 100, B = 3380, I = 0.00671
*/
/*
* Table1 (temperature for first 25 RAW values)
* Usage: TEMP = rx51_temp_table1[RAW]
* RAW is between 1 and 24
* TEMP is between 201 C and 55 C
*/
static u8 rx51_temp_table1[] = {
255, 201, 159, 138, 124, 114, 106, 99, 94, 89, 85, 82, 78, 75,
73, 70, 68, 66, 64, 62, 61, 59, 57, 56, 55
};
/*
* Table2 (lowest RAW value for temperature)
* Usage: RAW = rx51_temp_table2[TEMP-rx51_temp_table2_first]
* TEMP is between 53 C and -32 C
* RAW is between 25 and 993
*/
#define rx51_temp_table2_first 53
static u16 rx51_temp_table2[] = {
25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 39,
40, 41, 43, 44, 46, 48, 49, 51, 53, 55, 57, 59, 61, 64,
66, 69, 71, 74, 77, 80, 83, 86, 90, 94, 97, 101, 106, 110,
115, 119, 125, 130, 136, 141, 148, 154, 161, 168, 176, 184, 202, 211,
221, 231, 242, 254, 266, 279, 293, 308, 323, 340, 357, 375, 395, 415,
437, 460, 485, 511, 539, 568, 600, 633, 669, 706, 747, 790, 836, 885,
937, 993, 1024
};
/*
* Read ADCIN channel 0 (battery temp) and convert value to tenths of Celsius
* Use Temperature look-up tables for conversation
*/
static int rx51_battery_read_temperature(struct rx51_device_info *di)
{
int min = 0;
int max = ARRAY_SIZE(rx51_temp_table2) - 1;
int raw = rx51_battery_read_adc(di->channel_temp);
if (raw < 0)
dev_err(di->dev, "Could not read ADC: %d\n", raw);
/* Zero and negative values are undefined */
if (raw <= 0)
return INT_MAX;
/* ADC channels are 10 bit, higher value are undefined */
if (raw >= (1 << 10))
return INT_MIN;
/* First check for temperature in first direct table */
if (raw < ARRAY_SIZE(rx51_temp_table1))
return rx51_temp_table1[raw] * 10;
/* Binary search RAW value in second inverse table */
while (max - min > 1) {
int mid = (max + min) / 2;
if (rx51_temp_table2[mid] <= raw)
min = mid;
else if (rx51_temp_table2[mid] > raw)
max = mid;
if (rx51_temp_table2[mid] == raw)
break;
}
return (rx51_temp_table2_first - min) * 10;
}
/*
* Read ADCIN channel 4 (BSI) and convert RAW value to micro Ah
* This conversion formula was extracted from maemo program bsi-read
*/
static int rx51_battery_read_capacity(struct rx51_device_info *di)
{
int capacity = rx51_battery_read_adc(di->channel_bsi);
if (capacity < 0) {
dev_err(di->dev, "Could not read ADC: %d\n", capacity);
return capacity;
}
return 1280 * (1200 * capacity)/(1024 - capacity);
}
/*
* Return power_supply property
*/
static int rx51_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct rx51_device_info *di = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
val->intval = 4200000;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = rx51_battery_read_voltage(di) ? 1 : 0;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = rx51_battery_read_voltage(di);
break;
case POWER_SUPPLY_PROP_TEMP:
val->intval = rx51_battery_read_temperature(di);
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
val->intval = rx51_battery_read_capacity(di);
break;
default:
return -EINVAL;
}
if (val->intval == INT_MAX || val->intval == INT_MIN)
return -EINVAL;
return 0;
}
static enum power_supply_property rx51_battery_props[] = {
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
};
static int rx51_battery_probe(struct platform_device *pdev)
{
struct power_supply_config psy_cfg = {};
struct rx51_device_info *di;
int ret;
di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
if (!di)
return -ENOMEM;
platform_set_drvdata(pdev, di);
di->dev = &pdev->dev;
di->bat_desc.name = "rx51-battery";
di->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY;
di->bat_desc.properties = rx51_battery_props;
di->bat_desc.num_properties = ARRAY_SIZE(rx51_battery_props);
di->bat_desc.get_property = rx51_battery_get_property;
psy_cfg.drv_data = di;
di->channel_temp = iio_channel_get(di->dev, "temp");
if (IS_ERR(di->channel_temp)) {
ret = PTR_ERR(di->channel_temp);
goto error;
}
di->channel_bsi = iio_channel_get(di->dev, "bsi");
if (IS_ERR(di->channel_bsi)) {
ret = PTR_ERR(di->channel_bsi);
goto error_channel_temp;
}
di->channel_vbat = iio_channel_get(di->dev, "vbat");
if (IS_ERR(di->channel_vbat)) {
ret = PTR_ERR(di->channel_vbat);
goto error_channel_bsi;
}
di->bat = power_supply_register(di->dev, &di->bat_desc, &psy_cfg);
if (IS_ERR(di->bat)) {
ret = PTR_ERR(di->bat);
goto error_channel_vbat;
}
return 0;
error_channel_vbat:
iio_channel_release(di->channel_vbat);
error_channel_bsi:
iio_channel_release(di->channel_bsi);
error_channel_temp:
iio_channel_release(di->channel_temp);
error:
return ret;
}
static int rx51_battery_remove(struct platform_device *pdev)
{
struct rx51_device_info *di = platform_get_drvdata(pdev);
power_supply_unregister(di->bat);
iio_channel_release(di->channel_vbat);
iio_channel_release(di->channel_bsi);
iio_channel_release(di->channel_temp);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id n900_battery_of_match[] = {
{.compatible = "nokia,n900-battery", },
{ },
};
MODULE_DEVICE_TABLE(of, n900_battery_of_match);
#endif
static struct platform_driver rx51_battery_driver = {
.probe = rx51_battery_probe,
.remove = rx51_battery_remove,
.driver = {
.name = "rx51-battery",
.of_match_table = of_match_ptr(n900_battery_of_match),
},
};
module_platform_driver(rx51_battery_driver);
MODULE_ALIAS("platform:rx51-battery");
MODULE_AUTHOR("Pali Rohár <[email protected]>");
MODULE_DESCRIPTION("Nokia RX-51 battery driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/rx51_battery.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2011 Samsung Electronics Co., Ltd.
* MyungJoo Ham <[email protected]>
*
* This driver enables to monitor battery health and control charger
* during suspend-to-mem.
* Charger manager depends on other devices. Register this later than
* the depending devices.
*
**/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/io.h>
#include <linux/module.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/rtc.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/platform_device.h>
#include <linux/power/charger-manager.h>
#include <linux/regulator/consumer.h>
#include <linux/sysfs.h>
#include <linux/of.h>
#include <linux/thermal.h>
static struct {
const char *name;
u64 extcon_type;
} extcon_mapping[] = {
/* Current textual representations */
{ "USB", EXTCON_USB },
{ "USB-HOST", EXTCON_USB_HOST },
{ "SDP", EXTCON_CHG_USB_SDP },
{ "DCP", EXTCON_CHG_USB_DCP },
{ "CDP", EXTCON_CHG_USB_CDP },
{ "ACA", EXTCON_CHG_USB_ACA },
{ "FAST-CHARGER", EXTCON_CHG_USB_FAST },
{ "SLOW-CHARGER", EXTCON_CHG_USB_SLOW },
{ "WPT", EXTCON_CHG_WPT },
{ "PD", EXTCON_CHG_USB_PD },
{ "DOCK", EXTCON_DOCK },
{ "JIG", EXTCON_JIG },
{ "MECHANICAL", EXTCON_MECHANICAL },
/* Deprecated textual representations */
{ "TA", EXTCON_CHG_USB_SDP },
{ "CHARGE-DOWNSTREAM", EXTCON_CHG_USB_CDP },
};
/*
* Default temperature threshold for charging.
* Every temperature units are in tenth of centigrade.
*/
#define CM_DEFAULT_RECHARGE_TEMP_DIFF 50
#define CM_DEFAULT_CHARGE_TEMP_MAX 500
/*
* Regard CM_JIFFIES_SMALL jiffies is small enough to ignore for
* delayed works so that we can run delayed works with CM_JIFFIES_SMALL
* without any delays.
*/
#define CM_JIFFIES_SMALL (2)
/* If y is valid (> 0) and smaller than x, do x = y */
#define CM_MIN_VALID(x, y) x = (((y > 0) && ((x) > (y))) ? (y) : (x))
/*
* Regard CM_RTC_SMALL (sec) is small enough to ignore error in invoking
* rtc alarm. It should be 2 or larger
*/
#define CM_RTC_SMALL (2)
static LIST_HEAD(cm_list);
static DEFINE_MUTEX(cm_list_mtx);
/* About in-suspend (suspend-again) monitoring */
static struct alarm *cm_timer;
static bool cm_suspended;
static bool cm_timer_set;
static unsigned long cm_suspend_duration_ms;
/* About normal (not suspended) monitoring */
static unsigned long polling_jiffy = ULONG_MAX; /* ULONG_MAX: no polling */
static unsigned long next_polling; /* Next appointed polling time */
static struct workqueue_struct *cm_wq; /* init at driver add */
static struct delayed_work cm_monitor_work; /* init at driver add */
/**
* is_batt_present - See if the battery presents in place.
* @cm: the Charger Manager representing the battery.
*/
static bool is_batt_present(struct charger_manager *cm)
{
union power_supply_propval val;
struct power_supply *psy;
bool present = false;
int i, ret;
switch (cm->desc->battery_present) {
case CM_BATTERY_PRESENT:
present = true;
break;
case CM_NO_BATTERY:
break;
case CM_FUEL_GAUGE:
psy = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
if (!psy)
break;
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_PRESENT,
&val);
if (ret == 0 && val.intval)
present = true;
power_supply_put(psy);
break;
case CM_CHARGER_STAT:
for (i = 0; cm->desc->psy_charger_stat[i]; i++) {
psy = power_supply_get_by_name(
cm->desc->psy_charger_stat[i]);
if (!psy) {
dev_err(cm->dev, "Cannot find power supply \"%s\"\n",
cm->desc->psy_charger_stat[i]);
continue;
}
ret = power_supply_get_property(psy,
POWER_SUPPLY_PROP_PRESENT, &val);
power_supply_put(psy);
if (ret == 0 && val.intval) {
present = true;
break;
}
}
break;
}
return present;
}
/**
* is_ext_pwr_online - See if an external power source is attached to charge
* @cm: the Charger Manager representing the battery.
*
* Returns true if at least one of the chargers of the battery has an external
* power source attached to charge the battery regardless of whether it is
* actually charging or not.
*/
static bool is_ext_pwr_online(struct charger_manager *cm)
{
union power_supply_propval val;
struct power_supply *psy;
bool online = false;
int i, ret;
/* If at least one of them has one, it's yes. */
for (i = 0; cm->desc->psy_charger_stat[i]; i++) {
psy = power_supply_get_by_name(cm->desc->psy_charger_stat[i]);
if (!psy) {
dev_err(cm->dev, "Cannot find power supply \"%s\"\n",
cm->desc->psy_charger_stat[i]);
continue;
}
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_ONLINE,
&val);
power_supply_put(psy);
if (ret == 0 && val.intval) {
online = true;
break;
}
}
return online;
}
/**
* get_batt_uV - Get the voltage level of the battery
* @cm: the Charger Manager representing the battery.
* @uV: the voltage level returned.
*
* Returns 0 if there is no error.
* Returns a negative value on error.
*/
static int get_batt_uV(struct charger_manager *cm, int *uV)
{
union power_supply_propval val;
struct power_supply *fuel_gauge;
int ret;
fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
if (!fuel_gauge)
return -ENODEV;
ret = power_supply_get_property(fuel_gauge,
POWER_SUPPLY_PROP_VOLTAGE_NOW, &val);
power_supply_put(fuel_gauge);
if (ret)
return ret;
*uV = val.intval;
return 0;
}
/**
* is_charging - Returns true if the battery is being charged.
* @cm: the Charger Manager representing the battery.
*/
static bool is_charging(struct charger_manager *cm)
{
int i, ret;
bool charging = false;
struct power_supply *psy;
union power_supply_propval val;
/* If there is no battery, it cannot be charged */
if (!is_batt_present(cm))
return false;
/* If at least one of the charger is charging, return yes */
for (i = 0; cm->desc->psy_charger_stat[i]; i++) {
/* 1. The charger sholuld not be DISABLED */
if (cm->emergency_stop)
continue;
if (!cm->charger_enabled)
continue;
psy = power_supply_get_by_name(cm->desc->psy_charger_stat[i]);
if (!psy) {
dev_err(cm->dev, "Cannot find power supply \"%s\"\n",
cm->desc->psy_charger_stat[i]);
continue;
}
/* 2. The charger should be online (ext-power) */
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_ONLINE,
&val);
if (ret) {
dev_warn(cm->dev, "Cannot read ONLINE value from %s\n",
cm->desc->psy_charger_stat[i]);
power_supply_put(psy);
continue;
}
if (val.intval == 0) {
power_supply_put(psy);
continue;
}
/*
* 3. The charger should not be FULL, DISCHARGING,
* or NOT_CHARGING.
*/
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_STATUS,
&val);
power_supply_put(psy);
if (ret) {
dev_warn(cm->dev, "Cannot read STATUS value from %s\n",
cm->desc->psy_charger_stat[i]);
continue;
}
if (val.intval == POWER_SUPPLY_STATUS_FULL ||
val.intval == POWER_SUPPLY_STATUS_DISCHARGING ||
val.intval == POWER_SUPPLY_STATUS_NOT_CHARGING)
continue;
/* Then, this is charging. */
charging = true;
break;
}
return charging;
}
/**
* is_full_charged - Returns true if the battery is fully charged.
* @cm: the Charger Manager representing the battery.
*/
static bool is_full_charged(struct charger_manager *cm)
{
struct charger_desc *desc = cm->desc;
union power_supply_propval val;
struct power_supply *fuel_gauge;
bool is_full = false;
int ret = 0;
int uV;
/* If there is no battery, it cannot be charged */
if (!is_batt_present(cm))
return false;
fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
if (!fuel_gauge)
return false;
/* Full, if it's over the fullbatt voltage */
if (desc->fullbatt_uV > 0) {
ret = get_batt_uV(cm, &uV);
if (!ret) {
/* Battery is already full, checks voltage drop. */
if (cm->battery_status == POWER_SUPPLY_STATUS_FULL
&& desc->fullbatt_vchkdrop_uV)
uV += desc->fullbatt_vchkdrop_uV;
if (uV >= desc->fullbatt_uV)
return true;
}
}
if (desc->fullbatt_full_capacity > 0) {
val.intval = 0;
/* Not full if capacity of fuel gauge isn't full */
ret = power_supply_get_property(fuel_gauge,
POWER_SUPPLY_PROP_CHARGE_FULL, &val);
if (!ret && val.intval > desc->fullbatt_full_capacity) {
is_full = true;
goto out;
}
}
/* Full, if the capacity is more than fullbatt_soc */
if (desc->fullbatt_soc > 0) {
val.intval = 0;
ret = power_supply_get_property(fuel_gauge,
POWER_SUPPLY_PROP_CAPACITY, &val);
if (!ret && val.intval >= desc->fullbatt_soc) {
is_full = true;
goto out;
}
}
out:
power_supply_put(fuel_gauge);
return is_full;
}
/**
* is_polling_required - Return true if need to continue polling for this CM.
* @cm: the Charger Manager representing the battery.
*/
static bool is_polling_required(struct charger_manager *cm)
{
switch (cm->desc->polling_mode) {
case CM_POLL_DISABLE:
return false;
case CM_POLL_ALWAYS:
return true;
case CM_POLL_EXTERNAL_POWER_ONLY:
return is_ext_pwr_online(cm);
case CM_POLL_CHARGING_ONLY:
return is_charging(cm);
default:
dev_warn(cm->dev, "Incorrect polling_mode (%d)\n",
cm->desc->polling_mode);
}
return false;
}
/**
* try_charger_enable - Enable/Disable chargers altogether
* @cm: the Charger Manager representing the battery.
* @enable: true: enable / false: disable
*
* Note that Charger Manager keeps the charger enabled regardless whether
* the charger is charging or not (because battery is full or no external
* power source exists) except when CM needs to disable chargers forcibly
* because of emergency causes; when the battery is overheated or too cold.
*/
static int try_charger_enable(struct charger_manager *cm, bool enable)
{
int err = 0, i;
struct charger_desc *desc = cm->desc;
/* Ignore if it's redundant command */
if (enable == cm->charger_enabled)
return 0;
if (enable) {
if (cm->emergency_stop)
return -EAGAIN;
/*
* Save start time of charging to limit
* maximum possible charging time.
*/
cm->charging_start_time = ktime_to_ms(ktime_get());
cm->charging_end_time = 0;
for (i = 0 ; i < desc->num_charger_regulators ; i++) {
if (desc->charger_regulators[i].externally_control)
continue;
err = regulator_enable(desc->charger_regulators[i].consumer);
if (err < 0) {
dev_warn(cm->dev, "Cannot enable %s regulator\n",
desc->charger_regulators[i].regulator_name);
}
}
} else {
/*
* Save end time of charging to maintain fully charged state
* of battery after full-batt.
*/
cm->charging_start_time = 0;
cm->charging_end_time = ktime_to_ms(ktime_get());
for (i = 0 ; i < desc->num_charger_regulators ; i++) {
if (desc->charger_regulators[i].externally_control)
continue;
err = regulator_disable(desc->charger_regulators[i].consumer);
if (err < 0) {
dev_warn(cm->dev, "Cannot disable %s regulator\n",
desc->charger_regulators[i].regulator_name);
}
}
/*
* Abnormal battery state - Stop charging forcibly,
* even if charger was enabled at the other places
*/
for (i = 0; i < desc->num_charger_regulators; i++) {
if (regulator_is_enabled(
desc->charger_regulators[i].consumer)) {
regulator_force_disable(
desc->charger_regulators[i].consumer);
dev_warn(cm->dev, "Disable regulator(%s) forcibly\n",
desc->charger_regulators[i].regulator_name);
}
}
}
if (!err)
cm->charger_enabled = enable;
return err;
}
/**
* check_charging_duration - Monitor charging/discharging duration
* @cm: the Charger Manager representing the battery.
*
* If whole charging duration exceed 'charging_max_duration_ms',
* cm stop charging to prevent overcharge/overheat. If discharging
* duration exceed 'discharging _max_duration_ms', charger cable is
* attached, after full-batt, cm start charging to maintain fully
* charged state for battery.
*/
static int check_charging_duration(struct charger_manager *cm)
{
struct charger_desc *desc = cm->desc;
u64 curr = ktime_to_ms(ktime_get());
u64 duration;
int ret = false;
if (!desc->charging_max_duration_ms &&
!desc->discharging_max_duration_ms)
return ret;
if (cm->charger_enabled) {
duration = curr - cm->charging_start_time;
if (duration > desc->charging_max_duration_ms) {
dev_info(cm->dev, "Charging duration exceed %ums\n",
desc->charging_max_duration_ms);
ret = true;
}
} else if (cm->battery_status == POWER_SUPPLY_STATUS_NOT_CHARGING) {
duration = curr - cm->charging_end_time;
if (duration > desc->discharging_max_duration_ms) {
dev_info(cm->dev, "Discharging duration exceed %ums\n",
desc->discharging_max_duration_ms);
ret = true;
}
}
return ret;
}
static int cm_get_battery_temperature_by_psy(struct charger_manager *cm,
int *temp)
{
struct power_supply *fuel_gauge;
int ret;
fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
if (!fuel_gauge)
return -ENODEV;
ret = power_supply_get_property(fuel_gauge,
POWER_SUPPLY_PROP_TEMP,
(union power_supply_propval *)temp);
power_supply_put(fuel_gauge);
return ret;
}
static int cm_get_battery_temperature(struct charger_manager *cm,
int *temp)
{
int ret;
if (!cm->desc->measure_battery_temp)
return -ENODEV;
#ifdef CONFIG_THERMAL
if (cm->tzd_batt) {
ret = thermal_zone_get_temp(cm->tzd_batt, temp);
if (!ret)
/* Calibrate temperature unit */
*temp /= 100;
} else
#endif
{
/* if-else continued from CONFIG_THERMAL */
ret = cm_get_battery_temperature_by_psy(cm, temp);
}
return ret;
}
static int cm_check_thermal_status(struct charger_manager *cm)
{
struct charger_desc *desc = cm->desc;
int temp, upper_limit, lower_limit;
int ret = 0;
ret = cm_get_battery_temperature(cm, &temp);
if (ret) {
/* FIXME:
* No information of battery temperature might
* occur hazardous result. We have to handle it
* depending on battery type.
*/
dev_err(cm->dev, "Failed to get battery temperature\n");
return 0;
}
upper_limit = desc->temp_max;
lower_limit = desc->temp_min;
if (cm->emergency_stop) {
upper_limit -= desc->temp_diff;
lower_limit += desc->temp_diff;
}
if (temp > upper_limit)
ret = CM_BATT_OVERHEAT;
else if (temp < lower_limit)
ret = CM_BATT_COLD;
else
ret = CM_BATT_OK;
cm->emergency_stop = ret;
return ret;
}
/**
* cm_get_target_status - Check current status and get next target status.
* @cm: the Charger Manager representing the battery.
*/
static int cm_get_target_status(struct charger_manager *cm)
{
if (!is_ext_pwr_online(cm))
return POWER_SUPPLY_STATUS_DISCHARGING;
if (cm_check_thermal_status(cm)) {
/* Check if discharging duration exceeds limit. */
if (check_charging_duration(cm))
goto charging_ok;
return POWER_SUPPLY_STATUS_NOT_CHARGING;
}
switch (cm->battery_status) {
case POWER_SUPPLY_STATUS_CHARGING:
/* Check if charging duration exceeds limit. */
if (check_charging_duration(cm))
return POWER_SUPPLY_STATUS_FULL;
fallthrough;
case POWER_SUPPLY_STATUS_FULL:
if (is_full_charged(cm))
return POWER_SUPPLY_STATUS_FULL;
fallthrough;
default:
break;
}
charging_ok:
/* Charging is allowed. */
return POWER_SUPPLY_STATUS_CHARGING;
}
/**
* _cm_monitor - Monitor the temperature and return true for exceptions.
* @cm: the Charger Manager representing the battery.
*
* Returns true if there is an event to notify for the battery.
* (True if the status of "emergency_stop" changes)
*/
static bool _cm_monitor(struct charger_manager *cm)
{
int target;
target = cm_get_target_status(cm);
try_charger_enable(cm, (target == POWER_SUPPLY_STATUS_CHARGING));
if (cm->battery_status != target) {
cm->battery_status = target;
power_supply_changed(cm->charger_psy);
}
return (cm->battery_status == POWER_SUPPLY_STATUS_NOT_CHARGING);
}
/**
* cm_monitor - Monitor every battery.
*
* Returns true if there is an event to notify from any of the batteries.
* (True if the status of "emergency_stop" changes)
*/
static bool cm_monitor(void)
{
bool stop = false;
struct charger_manager *cm;
mutex_lock(&cm_list_mtx);
list_for_each_entry(cm, &cm_list, entry) {
if (_cm_monitor(cm))
stop = true;
}
mutex_unlock(&cm_list_mtx);
return stop;
}
/**
* _setup_polling - Setup the next instance of polling.
* @work: work_struct of the function _setup_polling.
*/
static void _setup_polling(struct work_struct *work)
{
unsigned long min = ULONG_MAX;
struct charger_manager *cm;
bool keep_polling = false;
unsigned long _next_polling;
mutex_lock(&cm_list_mtx);
list_for_each_entry(cm, &cm_list, entry) {
if (is_polling_required(cm) && cm->desc->polling_interval_ms) {
keep_polling = true;
if (min > cm->desc->polling_interval_ms)
min = cm->desc->polling_interval_ms;
}
}
polling_jiffy = msecs_to_jiffies(min);
if (polling_jiffy <= CM_JIFFIES_SMALL)
polling_jiffy = CM_JIFFIES_SMALL + 1;
if (!keep_polling)
polling_jiffy = ULONG_MAX;
if (polling_jiffy == ULONG_MAX)
goto out;
WARN(cm_wq == NULL, "charger-manager: workqueue not initialized"
". try it later. %s\n", __func__);
/*
* Use mod_delayed_work() iff the next polling interval should
* occur before the currently scheduled one. If @cm_monitor_work
* isn't active, the end result is the same, so no need to worry
* about stale @next_polling.
*/
_next_polling = jiffies + polling_jiffy;
if (time_before(_next_polling, next_polling)) {
mod_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy);
next_polling = _next_polling;
} else {
if (queue_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy))
next_polling = _next_polling;
}
out:
mutex_unlock(&cm_list_mtx);
}
static DECLARE_WORK(setup_polling, _setup_polling);
/**
* cm_monitor_poller - The Monitor / Poller.
* @work: work_struct of the function cm_monitor_poller
*
* During non-suspended state, cm_monitor_poller is used to poll and monitor
* the batteries.
*/
static void cm_monitor_poller(struct work_struct *work)
{
cm_monitor();
schedule_work(&setup_polling);
}
static int charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct charger_manager *cm = power_supply_get_drvdata(psy);
struct charger_desc *desc = cm->desc;
struct power_supply *fuel_gauge = NULL;
int ret = 0;
int uV;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
val->intval = cm->battery_status;
break;
case POWER_SUPPLY_PROP_HEALTH:
if (cm->emergency_stop == CM_BATT_OVERHEAT)
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
else if (cm->emergency_stop == CM_BATT_COLD)
val->intval = POWER_SUPPLY_HEALTH_COLD;
else
val->intval = POWER_SUPPLY_HEALTH_GOOD;
break;
case POWER_SUPPLY_PROP_PRESENT:
if (is_batt_present(cm))
val->intval = 1;
else
val->intval = 0;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = get_batt_uV(cm, &val->intval);
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
if (!fuel_gauge) {
ret = -ENODEV;
break;
}
ret = power_supply_get_property(fuel_gauge,
POWER_SUPPLY_PROP_CURRENT_NOW, val);
break;
case POWER_SUPPLY_PROP_TEMP:
return cm_get_battery_temperature(cm, &val->intval);
case POWER_SUPPLY_PROP_CAPACITY:
if (!is_batt_present(cm)) {
/* There is no battery. Assume 100% */
val->intval = 100;
break;
}
fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
if (!fuel_gauge) {
ret = -ENODEV;
break;
}
ret = power_supply_get_property(fuel_gauge,
POWER_SUPPLY_PROP_CAPACITY, val);
if (ret)
break;
if (val->intval > 100) {
val->intval = 100;
break;
}
if (val->intval < 0)
val->intval = 0;
/* Do not adjust SOC when charging: voltage is overrated */
if (is_charging(cm))
break;
/*
* If the capacity value is inconsistent, calibrate it base on
* the battery voltage values and the thresholds given as desc
*/
ret = get_batt_uV(cm, &uV);
if (ret) {
/* Voltage information not available. No calibration */
ret = 0;
break;
}
if (desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV &&
!is_charging(cm)) {
val->intval = 100;
break;
}
break;
case POWER_SUPPLY_PROP_ONLINE:
if (is_ext_pwr_online(cm))
val->intval = 1;
else
val->intval = 0;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
case POWER_SUPPLY_PROP_CHARGE_NOW:
fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge);
if (!fuel_gauge) {
ret = -ENODEV;
break;
}
ret = power_supply_get_property(fuel_gauge, psp, val);
break;
default:
return -EINVAL;
}
if (fuel_gauge)
power_supply_put(fuel_gauge);
return ret;
}
#define NUM_CHARGER_PSY_OPTIONAL (4)
static enum power_supply_property default_charger_props[] = {
/* Guaranteed to provide */
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_ONLINE,
/*
* Optional properties are:
* POWER_SUPPLY_PROP_CHARGE_FULL,
* POWER_SUPPLY_PROP_CHARGE_NOW,
* POWER_SUPPLY_PROP_CURRENT_NOW,
* POWER_SUPPLY_PROP_TEMP,
*/
};
static const struct power_supply_desc psy_default = {
.name = "battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = default_charger_props,
.num_properties = ARRAY_SIZE(default_charger_props),
.get_property = charger_get_property,
.no_thermal = true,
};
/**
* cm_setup_timer - For in-suspend monitoring setup wakeup alarm
* for suspend_again.
*
* Returns true if the alarm is set for Charger Manager to use.
* Returns false if
* cm_setup_timer fails to set an alarm,
* cm_setup_timer does not need to set an alarm for Charger Manager,
* or an alarm previously configured is to be used.
*/
static bool cm_setup_timer(void)
{
struct charger_manager *cm;
unsigned int wakeup_ms = UINT_MAX;
int timer_req = 0;
if (time_after(next_polling, jiffies))
CM_MIN_VALID(wakeup_ms,
jiffies_to_msecs(next_polling - jiffies));
mutex_lock(&cm_list_mtx);
list_for_each_entry(cm, &cm_list, entry) {
/* Skip if polling is not required for this CM */
if (!is_polling_required(cm) && !cm->emergency_stop)
continue;
timer_req++;
if (cm->desc->polling_interval_ms == 0)
continue;
CM_MIN_VALID(wakeup_ms, cm->desc->polling_interval_ms);
}
mutex_unlock(&cm_list_mtx);
if (timer_req && cm_timer) {
ktime_t now, add;
/*
* Set alarm with the polling interval (wakeup_ms)
* The alarm time should be NOW + CM_RTC_SMALL or later.
*/
if (wakeup_ms == UINT_MAX ||
wakeup_ms < CM_RTC_SMALL * MSEC_PER_SEC)
wakeup_ms = 2 * CM_RTC_SMALL * MSEC_PER_SEC;
pr_info("Charger Manager wakeup timer: %u ms\n", wakeup_ms);
now = ktime_get_boottime();
add = ktime_set(wakeup_ms / MSEC_PER_SEC,
(wakeup_ms % MSEC_PER_SEC) * NSEC_PER_MSEC);
alarm_start(cm_timer, ktime_add(now, add));
cm_suspend_duration_ms = wakeup_ms;
return true;
}
return false;
}
/**
* charger_extcon_work - enable/diable charger according to the state
* of charger cable
*
* @work: work_struct of the function charger_extcon_work.
*/
static void charger_extcon_work(struct work_struct *work)
{
struct charger_cable *cable =
container_of(work, struct charger_cable, wq);
int ret;
if (cable->attached && cable->min_uA != 0 && cable->max_uA != 0) {
ret = regulator_set_current_limit(cable->charger->consumer,
cable->min_uA, cable->max_uA);
if (ret < 0) {
pr_err("Cannot set current limit of %s (%s)\n",
cable->charger->regulator_name, cable->name);
return;
}
pr_info("Set current limit of %s : %duA ~ %duA\n",
cable->charger->regulator_name,
cable->min_uA, cable->max_uA);
}
cancel_delayed_work(&cm_monitor_work);
queue_delayed_work(cm_wq, &cm_monitor_work, 0);
}
/**
* charger_extcon_notifier - receive the state of charger cable
* when registered cable is attached or detached.
*
* @self: the notifier block of the charger_extcon_notifier.
* @event: the cable state.
* @ptr: the data pointer of notifier block.
*/
static int charger_extcon_notifier(struct notifier_block *self,
unsigned long event, void *ptr)
{
struct charger_cable *cable =
container_of(self, struct charger_cable, nb);
/*
* The newly state of charger cable.
* If cable is attached, cable->attached is true.
*/
cable->attached = event;
/*
* Setup work for controlling charger(regulator)
* according to charger cable.
*/
schedule_work(&cable->wq);
return NOTIFY_DONE;
}
/**
* charger_extcon_init - register external connector to use it
* as the charger cable
*
* @cm: the Charger Manager representing the battery.
* @cable: the Charger cable representing the external connector.
*/
static int charger_extcon_init(struct charger_manager *cm,
struct charger_cable *cable)
{
int ret, i;
u64 extcon_type = EXTCON_NONE;
/*
* Charger manager use Extcon framework to identify
* the charger cable among various external connector
* cable (e.g., TA, USB, MHL, Dock).
*/
INIT_WORK(&cable->wq, charger_extcon_work);
cable->nb.notifier_call = charger_extcon_notifier;
cable->extcon_dev = extcon_get_extcon_dev(cable->extcon_name);
if (IS_ERR(cable->extcon_dev)) {
pr_err("Cannot find extcon_dev for %s (cable: %s)\n",
cable->extcon_name, cable->name);
return PTR_ERR(cable->extcon_dev);
}
for (i = 0; i < ARRAY_SIZE(extcon_mapping); i++) {
if (!strcmp(cable->name, extcon_mapping[i].name)) {
extcon_type = extcon_mapping[i].extcon_type;
break;
}
}
if (extcon_type == EXTCON_NONE) {
pr_err("Cannot find cable for type %s", cable->name);
return -EINVAL;
}
cable->extcon_type = extcon_type;
ret = devm_extcon_register_notifier(cm->dev, cable->extcon_dev,
cable->extcon_type, &cable->nb);
if (ret < 0) {
pr_err("Cannot register extcon_dev for %s (cable: %s)\n",
cable->extcon_name, cable->name);
return ret;
}
return 0;
}
/**
* charger_manager_register_extcon - Register extcon device to receive state
* of charger cable.
* @cm: the Charger Manager representing the battery.
*
* This function support EXTCON(External Connector) subsystem to detect the
* state of charger cables for enabling or disabling charger(regulator) and
* select the charger cable for charging among a number of external cable
* according to policy of H/W board.
*/
static int charger_manager_register_extcon(struct charger_manager *cm)
{
struct charger_desc *desc = cm->desc;
struct charger_regulator *charger;
unsigned long event;
int ret;
int i;
int j;
for (i = 0; i < desc->num_charger_regulators; i++) {
charger = &desc->charger_regulators[i];
charger->consumer = regulator_get(cm->dev,
charger->regulator_name);
if (IS_ERR(charger->consumer)) {
dev_err(cm->dev, "Cannot find charger(%s)\n",
charger->regulator_name);
return PTR_ERR(charger->consumer);
}
charger->cm = cm;
for (j = 0; j < charger->num_cables; j++) {
struct charger_cable *cable = &charger->cables[j];
ret = charger_extcon_init(cm, cable);
if (ret < 0) {
dev_err(cm->dev, "Cannot initialize charger(%s)\n",
charger->regulator_name);
return ret;
}
cable->charger = charger;
cable->cm = cm;
event = extcon_get_state(cable->extcon_dev,
cable->extcon_type);
charger_extcon_notifier(&cable->nb,
event, NULL);
}
}
return 0;
}
/* help function of sysfs node to control charger(regulator) */
static ssize_t charger_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct charger_regulator *charger
= container_of(attr, struct charger_regulator, attr_name);
return sysfs_emit(buf, "%s\n", charger->regulator_name);
}
static ssize_t charger_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct charger_regulator *charger
= container_of(attr, struct charger_regulator, attr_state);
int state = 0;
if (!charger->externally_control)
state = regulator_is_enabled(charger->consumer);
return sysfs_emit(buf, "%s\n", state ? "enabled" : "disabled");
}
static ssize_t charger_externally_control_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct charger_regulator *charger = container_of(attr,
struct charger_regulator, attr_externally_control);
return sysfs_emit(buf, "%d\n", charger->externally_control);
}
static ssize_t charger_externally_control_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct charger_regulator *charger
= container_of(attr, struct charger_regulator,
attr_externally_control);
struct charger_manager *cm = charger->cm;
struct charger_desc *desc = cm->desc;
int i;
int ret;
int externally_control;
int chargers_externally_control = 1;
ret = sscanf(buf, "%d", &externally_control);
if (ret == 0) {
ret = -EINVAL;
return ret;
}
if (!externally_control) {
charger->externally_control = 0;
return count;
}
for (i = 0; i < desc->num_charger_regulators; i++) {
if (&desc->charger_regulators[i] != charger &&
!desc->charger_regulators[i].externally_control) {
/*
* At least, one charger is controlled by
* charger-manager
*/
chargers_externally_control = 0;
break;
}
}
if (!chargers_externally_control) {
if (cm->charger_enabled) {
try_charger_enable(charger->cm, false);
charger->externally_control = externally_control;
try_charger_enable(charger->cm, true);
} else {
charger->externally_control = externally_control;
}
} else {
dev_warn(cm->dev,
"'%s' regulator should be controlled in charger-manager because charger-manager must need at least one charger for charging\n",
charger->regulator_name);
}
return count;
}
/**
* charger_manager_prepare_sysfs - Prepare sysfs entry for each charger
* @cm: the Charger Manager representing the battery.
*
* This function add sysfs entry for charger(regulator) to control charger from
* user-space. If some development board use one more chargers for charging
* but only need one charger on specific case which is dependent on user
* scenario or hardware restrictions, the user enter 1 or 0(zero) to '/sys/
* class/power_supply/battery/charger.[index]/externally_control'. For example,
* if user enter 1 to 'sys/class/power_supply/battery/charger.[index]/
* externally_control, this charger isn't controlled from charger-manager and
* always stay off state of regulator.
*/
static int charger_manager_prepare_sysfs(struct charger_manager *cm)
{
struct charger_desc *desc = cm->desc;
struct charger_regulator *charger;
int chargers_externally_control = 1;
char *name;
int i;
/* Create sysfs entry to control charger(regulator) */
for (i = 0; i < desc->num_charger_regulators; i++) {
charger = &desc->charger_regulators[i];
name = devm_kasprintf(cm->dev, GFP_KERNEL, "charger.%d", i);
if (!name)
return -ENOMEM;
charger->attrs[0] = &charger->attr_name.attr;
charger->attrs[1] = &charger->attr_state.attr;
charger->attrs[2] = &charger->attr_externally_control.attr;
charger->attrs[3] = NULL;
charger->attr_grp.name = name;
charger->attr_grp.attrs = charger->attrs;
desc->sysfs_groups[i] = &charger->attr_grp;
sysfs_attr_init(&charger->attr_name.attr);
charger->attr_name.attr.name = "name";
charger->attr_name.attr.mode = 0444;
charger->attr_name.show = charger_name_show;
sysfs_attr_init(&charger->attr_state.attr);
charger->attr_state.attr.name = "state";
charger->attr_state.attr.mode = 0444;
charger->attr_state.show = charger_state_show;
sysfs_attr_init(&charger->attr_externally_control.attr);
charger->attr_externally_control.attr.name
= "externally_control";
charger->attr_externally_control.attr.mode = 0644;
charger->attr_externally_control.show
= charger_externally_control_show;
charger->attr_externally_control.store
= charger_externally_control_store;
if (!desc->charger_regulators[i].externally_control ||
!chargers_externally_control)
chargers_externally_control = 0;
dev_info(cm->dev, "'%s' regulator's externally_control is %d\n",
charger->regulator_name, charger->externally_control);
}
if (chargers_externally_control) {
dev_err(cm->dev, "Cannot register regulator because charger-manager must need at least one charger for charging battery\n");
return -EINVAL;
}
return 0;
}
static int cm_init_thermal_data(struct charger_manager *cm,
struct power_supply *fuel_gauge,
enum power_supply_property *properties,
size_t *num_properties)
{
struct charger_desc *desc = cm->desc;
union power_supply_propval val;
int ret;
/* Verify whether fuel gauge provides battery temperature */
ret = power_supply_get_property(fuel_gauge,
POWER_SUPPLY_PROP_TEMP, &val);
if (!ret) {
properties[*num_properties] = POWER_SUPPLY_PROP_TEMP;
(*num_properties)++;
cm->desc->measure_battery_temp = true;
}
#ifdef CONFIG_THERMAL
if (ret && desc->thermal_zone) {
cm->tzd_batt =
thermal_zone_get_zone_by_name(desc->thermal_zone);
if (IS_ERR(cm->tzd_batt))
return PTR_ERR(cm->tzd_batt);
/* Use external thermometer */
properties[*num_properties] = POWER_SUPPLY_PROP_TEMP;
(*num_properties)++;
cm->desc->measure_battery_temp = true;
ret = 0;
}
#endif
if (cm->desc->measure_battery_temp) {
/* NOTICE : Default allowable minimum charge temperature is 0 */
if (!desc->temp_max)
desc->temp_max = CM_DEFAULT_CHARGE_TEMP_MAX;
if (!desc->temp_diff)
desc->temp_diff = CM_DEFAULT_RECHARGE_TEMP_DIFF;
}
return ret;
}
static const struct of_device_id charger_manager_match[] = {
{
.compatible = "charger-manager",
},
{},
};
MODULE_DEVICE_TABLE(of, charger_manager_match);
static struct charger_desc *of_cm_parse_desc(struct device *dev)
{
struct charger_desc *desc;
struct device_node *np = dev->of_node;
u32 poll_mode = CM_POLL_DISABLE;
u32 battery_stat = CM_NO_BATTERY;
int num_chgs = 0;
desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
if (!desc)
return ERR_PTR(-ENOMEM);
of_property_read_string(np, "cm-name", &desc->psy_name);
of_property_read_u32(np, "cm-poll-mode", &poll_mode);
desc->polling_mode = poll_mode;
of_property_read_u32(np, "cm-poll-interval",
&desc->polling_interval_ms);
of_property_read_u32(np, "cm-fullbatt-vchkdrop-volt",
&desc->fullbatt_vchkdrop_uV);
of_property_read_u32(np, "cm-fullbatt-voltage", &desc->fullbatt_uV);
of_property_read_u32(np, "cm-fullbatt-soc", &desc->fullbatt_soc);
of_property_read_u32(np, "cm-fullbatt-capacity",
&desc->fullbatt_full_capacity);
of_property_read_u32(np, "cm-battery-stat", &battery_stat);
desc->battery_present = battery_stat;
/* chargers */
num_chgs = of_property_count_strings(np, "cm-chargers");
if (num_chgs > 0) {
int i;
/* Allocate empty bin at the tail of array */
desc->psy_charger_stat = devm_kcalloc(dev,
num_chgs + 1,
sizeof(char *),
GFP_KERNEL);
if (!desc->psy_charger_stat)
return ERR_PTR(-ENOMEM);
for (i = 0; i < num_chgs; i++)
of_property_read_string_index(np, "cm-chargers",
i, &desc->psy_charger_stat[i]);
}
of_property_read_string(np, "cm-fuel-gauge", &desc->psy_fuel_gauge);
of_property_read_string(np, "cm-thermal-zone", &desc->thermal_zone);
of_property_read_u32(np, "cm-battery-cold", &desc->temp_min);
if (of_property_read_bool(np, "cm-battery-cold-in-minus"))
desc->temp_min *= -1;
of_property_read_u32(np, "cm-battery-hot", &desc->temp_max);
of_property_read_u32(np, "cm-battery-temp-diff", &desc->temp_diff);
of_property_read_u32(np, "cm-charging-max",
&desc->charging_max_duration_ms);
of_property_read_u32(np, "cm-discharging-max",
&desc->discharging_max_duration_ms);
/* battery charger regulators */
desc->num_charger_regulators = of_get_child_count(np);
if (desc->num_charger_regulators) {
struct charger_regulator *chg_regs;
struct device_node *child;
chg_regs = devm_kcalloc(dev,
desc->num_charger_regulators,
sizeof(*chg_regs),
GFP_KERNEL);
if (!chg_regs)
return ERR_PTR(-ENOMEM);
desc->charger_regulators = chg_regs;
desc->sysfs_groups = devm_kcalloc(dev,
desc->num_charger_regulators + 1,
sizeof(*desc->sysfs_groups),
GFP_KERNEL);
if (!desc->sysfs_groups)
return ERR_PTR(-ENOMEM);
for_each_child_of_node(np, child) {
struct charger_cable *cables;
struct device_node *_child;
of_property_read_string(child, "cm-regulator-name",
&chg_regs->regulator_name);
/* charger cables */
chg_regs->num_cables = of_get_child_count(child);
if (chg_regs->num_cables) {
cables = devm_kcalloc(dev,
chg_regs->num_cables,
sizeof(*cables),
GFP_KERNEL);
if (!cables) {
of_node_put(child);
return ERR_PTR(-ENOMEM);
}
chg_regs->cables = cables;
for_each_child_of_node(child, _child) {
of_property_read_string(_child,
"cm-cable-name", &cables->name);
of_property_read_string(_child,
"cm-cable-extcon",
&cables->extcon_name);
of_property_read_u32(_child,
"cm-cable-min",
&cables->min_uA);
of_property_read_u32(_child,
"cm-cable-max",
&cables->max_uA);
cables++;
}
}
chg_regs++;
}
}
return desc;
}
static inline struct charger_desc *cm_get_drv_data(struct platform_device *pdev)
{
if (pdev->dev.of_node)
return of_cm_parse_desc(&pdev->dev);
return dev_get_platdata(&pdev->dev);
}
static enum alarmtimer_restart cm_timer_func(struct alarm *alarm, ktime_t now)
{
cm_timer_set = false;
return ALARMTIMER_NORESTART;
}
static int charger_manager_probe(struct platform_device *pdev)
{
struct charger_desc *desc = cm_get_drv_data(pdev);
struct charger_manager *cm;
int ret, i = 0;
union power_supply_propval val;
struct power_supply *fuel_gauge;
enum power_supply_property *properties;
size_t num_properties;
struct power_supply_config psy_cfg = {};
if (IS_ERR(desc)) {
dev_err(&pdev->dev, "No platform data (desc) found\n");
return PTR_ERR(desc);
}
cm = devm_kzalloc(&pdev->dev, sizeof(*cm), GFP_KERNEL);
if (!cm)
return -ENOMEM;
/* Basic Values. Unspecified are Null or 0 */
cm->dev = &pdev->dev;
cm->desc = desc;
psy_cfg.drv_data = cm;
/* Initialize alarm timer */
if (alarmtimer_get_rtcdev()) {
cm_timer = devm_kzalloc(cm->dev, sizeof(*cm_timer), GFP_KERNEL);
if (!cm_timer)
return -ENOMEM;
alarm_init(cm_timer, ALARM_BOOTTIME, cm_timer_func);
}
/*
* Some of the following do not need to be errors.
* Users may intentionally ignore those features.
*/
if (desc->fullbatt_uV == 0) {
dev_info(&pdev->dev, "Ignoring full-battery voltage threshold as it is not supplied\n");
}
if (!desc->fullbatt_vchkdrop_uV) {
dev_info(&pdev->dev, "Disabling full-battery voltage drop checking mechanism as it is not supplied\n");
desc->fullbatt_vchkdrop_uV = 0;
}
if (desc->fullbatt_soc == 0) {
dev_info(&pdev->dev, "Ignoring full-battery soc(state of charge) threshold as it is not supplied\n");
}
if (desc->fullbatt_full_capacity == 0) {
dev_info(&pdev->dev, "Ignoring full-battery full capacity threshold as it is not supplied\n");
}
if (!desc->charger_regulators || desc->num_charger_regulators < 1) {
dev_err(&pdev->dev, "charger_regulators undefined\n");
return -EINVAL;
}
if (!desc->psy_charger_stat || !desc->psy_charger_stat[0]) {
dev_err(&pdev->dev, "No power supply defined\n");
return -EINVAL;
}
if (!desc->psy_fuel_gauge) {
dev_err(&pdev->dev, "No fuel gauge power supply defined\n");
return -EINVAL;
}
/* Check if charger's supplies are present at probe */
for (i = 0; desc->psy_charger_stat[i]; i++) {
struct power_supply *psy;
psy = power_supply_get_by_name(desc->psy_charger_stat[i]);
if (!psy) {
dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n",
desc->psy_charger_stat[i]);
return -ENODEV;
}
power_supply_put(psy);
}
if (cm->desc->polling_mode != CM_POLL_DISABLE &&
(desc->polling_interval_ms == 0 ||
msecs_to_jiffies(desc->polling_interval_ms) <= CM_JIFFIES_SMALL)) {
dev_err(&pdev->dev, "polling_interval_ms is too small\n");
return -EINVAL;
}
if (!desc->charging_max_duration_ms ||
!desc->discharging_max_duration_ms) {
dev_info(&pdev->dev, "Cannot limit charging duration checking mechanism to prevent overcharge/overheat and control discharging duration\n");
desc->charging_max_duration_ms = 0;
desc->discharging_max_duration_ms = 0;
}
platform_set_drvdata(pdev, cm);
memcpy(&cm->charger_psy_desc, &psy_default, sizeof(psy_default));
if (!desc->psy_name)
strncpy(cm->psy_name_buf, psy_default.name, PSY_NAME_MAX);
else
strncpy(cm->psy_name_buf, desc->psy_name, PSY_NAME_MAX);
cm->charger_psy_desc.name = cm->psy_name_buf;
/* Allocate for psy properties because they may vary */
properties = devm_kcalloc(&pdev->dev,
ARRAY_SIZE(default_charger_props) +
NUM_CHARGER_PSY_OPTIONAL,
sizeof(*properties), GFP_KERNEL);
if (!properties)
return -ENOMEM;
memcpy(properties, default_charger_props,
sizeof(enum power_supply_property) *
ARRAY_SIZE(default_charger_props));
num_properties = ARRAY_SIZE(default_charger_props);
/* Find which optional psy-properties are available */
fuel_gauge = power_supply_get_by_name(desc->psy_fuel_gauge);
if (!fuel_gauge) {
dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n",
desc->psy_fuel_gauge);
return -ENODEV;
}
if (!power_supply_get_property(fuel_gauge,
POWER_SUPPLY_PROP_CHARGE_FULL, &val)) {
properties[num_properties] =
POWER_SUPPLY_PROP_CHARGE_FULL;
num_properties++;
}
if (!power_supply_get_property(fuel_gauge,
POWER_SUPPLY_PROP_CHARGE_NOW, &val)) {
properties[num_properties] =
POWER_SUPPLY_PROP_CHARGE_NOW;
num_properties++;
}
if (!power_supply_get_property(fuel_gauge,
POWER_SUPPLY_PROP_CURRENT_NOW,
&val)) {
properties[num_properties] =
POWER_SUPPLY_PROP_CURRENT_NOW;
num_properties++;
}
ret = cm_init_thermal_data(cm, fuel_gauge, properties, &num_properties);
if (ret) {
dev_err(&pdev->dev, "Failed to initialize thermal data\n");
cm->desc->measure_battery_temp = false;
}
power_supply_put(fuel_gauge);
cm->charger_psy_desc.properties = properties;
cm->charger_psy_desc.num_properties = num_properties;
/* Register sysfs entry for charger(regulator) */
ret = charger_manager_prepare_sysfs(cm);
if (ret < 0) {
dev_err(&pdev->dev,
"Cannot prepare sysfs entry of regulators\n");
return ret;
}
psy_cfg.attr_grp = desc->sysfs_groups;
cm->charger_psy = power_supply_register(&pdev->dev,
&cm->charger_psy_desc,
&psy_cfg);
if (IS_ERR(cm->charger_psy)) {
dev_err(&pdev->dev, "Cannot register charger-manager with name \"%s\"\n",
cm->charger_psy_desc.name);
return PTR_ERR(cm->charger_psy);
}
/* Register extcon device for charger cable */
ret = charger_manager_register_extcon(cm);
if (ret < 0) {
dev_err(&pdev->dev, "Cannot initialize extcon device\n");
goto err_reg_extcon;
}
/* Add to the list */
mutex_lock(&cm_list_mtx);
list_add(&cm->entry, &cm_list);
mutex_unlock(&cm_list_mtx);
/*
* Charger-manager is capable of waking up the system from sleep
* when event is happened through cm_notify_event()
*/
device_init_wakeup(&pdev->dev, true);
device_set_wakeup_capable(&pdev->dev, false);
/*
* Charger-manager have to check the charging state right after
* initialization of charger-manager and then update current charging
* state.
*/
cm_monitor();
schedule_work(&setup_polling);
return 0;
err_reg_extcon:
for (i = 0; i < desc->num_charger_regulators; i++)
regulator_put(desc->charger_regulators[i].consumer);
power_supply_unregister(cm->charger_psy);
return ret;
}
static int charger_manager_remove(struct platform_device *pdev)
{
struct charger_manager *cm = platform_get_drvdata(pdev);
struct charger_desc *desc = cm->desc;
int i = 0;
/* Remove from the list */
mutex_lock(&cm_list_mtx);
list_del(&cm->entry);
mutex_unlock(&cm_list_mtx);
cancel_work_sync(&setup_polling);
cancel_delayed_work_sync(&cm_monitor_work);
for (i = 0 ; i < desc->num_charger_regulators ; i++)
regulator_put(desc->charger_regulators[i].consumer);
power_supply_unregister(cm->charger_psy);
try_charger_enable(cm, false);
return 0;
}
static const struct platform_device_id charger_manager_id[] = {
{ "charger-manager", 0 },
{ },
};
MODULE_DEVICE_TABLE(platform, charger_manager_id);
static int cm_suspend_noirq(struct device *dev)
{
if (device_may_wakeup(dev)) {
device_set_wakeup_capable(dev, false);
return -EAGAIN;
}
return 0;
}
static bool cm_need_to_awake(void)
{
struct charger_manager *cm;
if (cm_timer)
return false;
mutex_lock(&cm_list_mtx);
list_for_each_entry(cm, &cm_list, entry) {
if (is_charging(cm)) {
mutex_unlock(&cm_list_mtx);
return true;
}
}
mutex_unlock(&cm_list_mtx);
return false;
}
static int cm_suspend_prepare(struct device *dev)
{
if (cm_need_to_awake())
return -EBUSY;
if (!cm_suspended)
cm_suspended = true;
cm_timer_set = cm_setup_timer();
if (cm_timer_set) {
cancel_work_sync(&setup_polling);
cancel_delayed_work_sync(&cm_monitor_work);
}
return 0;
}
static void cm_suspend_complete(struct device *dev)
{
struct charger_manager *cm = dev_get_drvdata(dev);
if (cm_suspended)
cm_suspended = false;
if (cm_timer_set) {
ktime_t remain;
alarm_cancel(cm_timer);
cm_timer_set = false;
remain = alarm_expires_remaining(cm_timer);
cm_suspend_duration_ms -= ktime_to_ms(remain);
schedule_work(&setup_polling);
}
_cm_monitor(cm);
device_set_wakeup_capable(cm->dev, false);
}
static const struct dev_pm_ops charger_manager_pm = {
.prepare = cm_suspend_prepare,
.suspend_noirq = cm_suspend_noirq,
.complete = cm_suspend_complete,
};
static struct platform_driver charger_manager_driver = {
.driver = {
.name = "charger-manager",
.pm = &charger_manager_pm,
.of_match_table = charger_manager_match,
},
.probe = charger_manager_probe,
.remove = charger_manager_remove,
.id_table = charger_manager_id,
};
static int __init charger_manager_init(void)
{
cm_wq = create_freezable_workqueue("charger_manager");
if (unlikely(!cm_wq))
return -ENOMEM;
INIT_DELAYED_WORK(&cm_monitor_work, cm_monitor_poller);
return platform_driver_register(&charger_manager_driver);
}
late_initcall(charger_manager_init);
static void __exit charger_manager_cleanup(void)
{
destroy_workqueue(cm_wq);
cm_wq = NULL;
platform_driver_unregister(&charger_manager_driver);
}
module_exit(charger_manager_cleanup);
MODULE_AUTHOR("MyungJoo Ham <[email protected]>");
MODULE_DESCRIPTION("Charger Manager");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/charger-manager.c |
// SPDX-License-Identifier: GPL-2.0+
//
// max8998_charger.c - Power supply consumer driver for the Maxim 8998/LP3974
//
// Copyright (C) 2009-2010 Samsung Electronics
// MyungJoo Ham <[email protected]>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/mfd/max8998.h>
#include <linux/mfd/max8998-private.h>
struct max8998_battery_data {
struct device *dev;
struct max8998_dev *iodev;
struct power_supply *battery;
};
static enum power_supply_property max8998_battery_props[] = {
POWER_SUPPLY_PROP_PRESENT, /* the presence of battery */
POWER_SUPPLY_PROP_ONLINE, /* charger is active or not */
POWER_SUPPLY_PROP_STATUS, /* charger is charging/discharging/full */
};
/* Note that the charger control is done by a current regulator "CHARGER" */
static int max8998_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct max8998_battery_data *max8998 = power_supply_get_drvdata(psy);
struct i2c_client *i2c = max8998->iodev->i2c;
int ret;
u8 reg;
switch (psp) {
case POWER_SUPPLY_PROP_PRESENT:
ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, ®);
if (ret)
return ret;
if (reg & (1 << 4))
val->intval = 0;
else
val->intval = 1;
break;
case POWER_SUPPLY_PROP_ONLINE:
ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, ®);
if (ret)
return ret;
if (reg & (1 << 5))
val->intval = 1;
else
val->intval = 0;
break;
case POWER_SUPPLY_PROP_STATUS:
ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, ®);
if (ret)
return ret;
if (!(reg & (1 << 5))) {
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
} else {
if (reg & (1 << 6))
val->intval = POWER_SUPPLY_STATUS_FULL;
else if (reg & (1 << 3))
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
}
break;
default:
return -EINVAL;
}
return 0;
}
static const struct power_supply_desc max8998_battery_desc = {
.name = "max8998_pmic",
.type = POWER_SUPPLY_TYPE_BATTERY,
.get_property = max8998_battery_get_property,
.properties = max8998_battery_props,
.num_properties = ARRAY_SIZE(max8998_battery_props),
};
static int max8998_battery_probe(struct platform_device *pdev)
{
struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct max8998_platform_data *pdata = iodev->pdata;
struct power_supply_config psy_cfg = {};
struct max8998_battery_data *max8998;
struct i2c_client *i2c;
int ret = 0;
if (!pdata) {
dev_err(pdev->dev.parent, "No platform init data supplied\n");
return -ENODEV;
}
max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_battery_data),
GFP_KERNEL);
if (!max8998)
return -ENOMEM;
max8998->dev = &pdev->dev;
max8998->iodev = iodev;
platform_set_drvdata(pdev, max8998);
i2c = max8998->iodev->i2c;
/* Setup "End of Charge" */
/* If EOC value equals 0,
* remain value set from bootloader or default value */
if (pdata->eoc >= 10 && pdata->eoc <= 45) {
max8998_update_reg(i2c, MAX8998_REG_CHGR1,
(pdata->eoc / 5 - 2) << 5, 0x7 << 5);
} else if (pdata->eoc == 0) {
dev_dbg(max8998->dev,
"EOC value not set: leave it unchanged.\n");
} else {
dev_err(max8998->dev, "Invalid EOC value\n");
return -EINVAL;
}
/* Setup Charge Restart Level */
switch (pdata->restart) {
case 100:
max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x1 << 3, 0x3 << 3);
break;
case 150:
max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x0 << 3, 0x3 << 3);
break;
case 200:
max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x2 << 3, 0x3 << 3);
break;
case -1:
max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x3 << 3, 0x3 << 3);
break;
case 0:
dev_dbg(max8998->dev,
"Restart Level not set: leave it unchanged.\n");
break;
default:
dev_err(max8998->dev, "Invalid Restart Level\n");
return -EINVAL;
}
/* Setup Charge Full Timeout */
switch (pdata->timeout) {
case 5:
max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x0 << 4, 0x3 << 4);
break;
case 6:
max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x1 << 4, 0x3 << 4);
break;
case 7:
max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x2 << 4, 0x3 << 4);
break;
case -1:
max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x3 << 4, 0x3 << 4);
break;
case 0:
dev_dbg(max8998->dev,
"Full Timeout not set: leave it unchanged.\n");
break;
default:
dev_err(max8998->dev, "Invalid Full Timeout value\n");
return -EINVAL;
}
psy_cfg.drv_data = max8998;
max8998->battery = devm_power_supply_register(max8998->dev,
&max8998_battery_desc,
&psy_cfg);
if (IS_ERR(max8998->battery)) {
ret = PTR_ERR(max8998->battery);
dev_err(max8998->dev, "failed: power supply register: %d\n",
ret);
return ret;
}
return 0;
}
static const struct platform_device_id max8998_battery_id[] = {
{ "max8998-battery", TYPE_MAX8998 },
{ }
};
static struct platform_driver max8998_battery_driver = {
.driver = {
.name = "max8998-battery",
},
.probe = max8998_battery_probe,
.id_table = max8998_battery_id,
};
module_platform_driver(max8998_battery_driver);
MODULE_DESCRIPTION("MAXIM 8998 battery control driver");
MODULE_AUTHOR("MyungJoo Ham <[email protected]>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:max8998-battery");
| linux-master | drivers/power/supply/max8998_charger.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Charging control driver for the Wilco EC
*
* Copyright 2019 Google LLC
*
* See Documentation/ABI/testing/sysfs-class-power and
* Documentation/ABI/testing/sysfs-class-power-wilco for userspace interface
* and other info.
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/platform_data/wilco-ec.h>
#include <linux/power_supply.h>
#define DRV_NAME "wilco-charger"
/* Property IDs and related EC constants */
#define PID_CHARGE_MODE 0x0710
#define PID_CHARGE_LOWER_LIMIT 0x0711
#define PID_CHARGE_UPPER_LIMIT 0x0712
enum charge_mode {
CHARGE_MODE_STD = 1, /* Used for Standard */
CHARGE_MODE_EXP = 2, /* Express Charge, used for Fast */
CHARGE_MODE_AC = 3, /* Mostly AC use, used for Trickle */
CHARGE_MODE_AUTO = 4, /* Used for Adaptive */
CHARGE_MODE_CUSTOM = 5, /* Used for Custom */
CHARGE_MODE_LONGLIFE = 6, /* Used for Long Life */
};
#define CHARGE_LOWER_LIMIT_MIN 50
#define CHARGE_LOWER_LIMIT_MAX 95
#define CHARGE_UPPER_LIMIT_MIN 55
#define CHARGE_UPPER_LIMIT_MAX 100
/* Convert from POWER_SUPPLY_PROP_CHARGE_TYPE value to the EC's charge mode */
static int psp_val_to_charge_mode(int psp_val)
{
switch (psp_val) {
case POWER_SUPPLY_CHARGE_TYPE_TRICKLE:
return CHARGE_MODE_AC;
case POWER_SUPPLY_CHARGE_TYPE_FAST:
return CHARGE_MODE_EXP;
case POWER_SUPPLY_CHARGE_TYPE_STANDARD:
return CHARGE_MODE_STD;
case POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE:
return CHARGE_MODE_AUTO;
case POWER_SUPPLY_CHARGE_TYPE_CUSTOM:
return CHARGE_MODE_CUSTOM;
case POWER_SUPPLY_CHARGE_TYPE_LONGLIFE:
return CHARGE_MODE_LONGLIFE;
default:
return -EINVAL;
}
}
/* Convert from EC's charge mode to POWER_SUPPLY_PROP_CHARGE_TYPE value */
static int charge_mode_to_psp_val(enum charge_mode mode)
{
switch (mode) {
case CHARGE_MODE_AC:
return POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
case CHARGE_MODE_EXP:
return POWER_SUPPLY_CHARGE_TYPE_FAST;
case CHARGE_MODE_STD:
return POWER_SUPPLY_CHARGE_TYPE_STANDARD;
case CHARGE_MODE_AUTO:
return POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE;
case CHARGE_MODE_CUSTOM:
return POWER_SUPPLY_CHARGE_TYPE_CUSTOM;
case CHARGE_MODE_LONGLIFE:
return POWER_SUPPLY_CHARGE_TYPE_LONGLIFE;
default:
return -EINVAL;
}
}
static enum power_supply_property wilco_charge_props[] = {
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD,
POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD,
};
static int wilco_charge_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct wilco_ec_device *ec = power_supply_get_drvdata(psy);
u32 property_id;
int ret;
u8 raw;
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_TYPE:
property_id = PID_CHARGE_MODE;
break;
case POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD:
property_id = PID_CHARGE_LOWER_LIMIT;
break;
case POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD:
property_id = PID_CHARGE_UPPER_LIMIT;
break;
default:
return -EINVAL;
}
ret = wilco_ec_get_byte_property(ec, property_id, &raw);
if (ret < 0)
return ret;
if (property_id == PID_CHARGE_MODE) {
ret = charge_mode_to_psp_val(raw);
if (ret < 0)
return -EBADMSG;
raw = ret;
}
val->intval = raw;
return 0;
}
static int wilco_charge_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct wilco_ec_device *ec = power_supply_get_drvdata(psy);
int mode;
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_TYPE:
mode = psp_val_to_charge_mode(val->intval);
if (mode < 0)
return -EINVAL;
return wilco_ec_set_byte_property(ec, PID_CHARGE_MODE, mode);
case POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD:
if (val->intval < CHARGE_LOWER_LIMIT_MIN ||
val->intval > CHARGE_LOWER_LIMIT_MAX)
return -EINVAL;
return wilco_ec_set_byte_property(ec, PID_CHARGE_LOWER_LIMIT,
val->intval);
case POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD:
if (val->intval < CHARGE_UPPER_LIMIT_MIN ||
val->intval > CHARGE_UPPER_LIMIT_MAX)
return -EINVAL;
return wilco_ec_set_byte_property(ec, PID_CHARGE_UPPER_LIMIT,
val->intval);
default:
return -EINVAL;
}
}
static int wilco_charge_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
return 1;
}
static const struct power_supply_desc wilco_ps_desc = {
.properties = wilco_charge_props,
.num_properties = ARRAY_SIZE(wilco_charge_props),
.get_property = wilco_charge_get_property,
.set_property = wilco_charge_set_property,
.property_is_writeable = wilco_charge_property_is_writeable,
.name = DRV_NAME,
.type = POWER_SUPPLY_TYPE_MAINS,
};
static int wilco_charge_probe(struct platform_device *pdev)
{
struct wilco_ec_device *ec = dev_get_drvdata(pdev->dev.parent);
struct power_supply_config psy_cfg = {};
struct power_supply *psy;
psy_cfg.drv_data = ec;
psy = devm_power_supply_register(&pdev->dev, &wilco_ps_desc, &psy_cfg);
return PTR_ERR_OR_ZERO(psy);
}
static struct platform_driver wilco_charge_driver = {
.probe = wilco_charge_probe,
.driver = {
.name = DRV_NAME,
}
};
module_platform_driver(wilco_charge_driver);
MODULE_ALIAS("platform:" DRV_NAME);
MODULE_AUTHOR("Nick Crews <[email protected]>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Wilco EC charge control driver");
| linux-master | drivers/power/supply/wilco-charger.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/* NXP PCF50633 Main Battery Charger Driver
*
* (C) 2006-2008 by Openmoko, Inc.
* Author: Balaji Rao <[email protected]>
* All rights reserved.
*
* Broken down from monstrous PCF50633 driver mainly by
* Harald Welte, Andy Green and Werner Almesberger
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/mfd/pcf50633/core.h>
#include <linux/mfd/pcf50633/mbc.h>
struct pcf50633_mbc {
struct pcf50633 *pcf;
int adapter_online;
int usb_online;
struct power_supply *usb;
struct power_supply *adapter;
struct power_supply *ac;
};
int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
{
struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
int ret = 0;
u8 bits;
u8 mbcs2, chgmod;
unsigned int mbcc5;
if (ma >= 1000) {
bits = PCF50633_MBCC7_USB_1000mA;
ma = 1000;
} else if (ma >= 500) {
bits = PCF50633_MBCC7_USB_500mA;
ma = 500;
} else if (ma >= 100) {
bits = PCF50633_MBCC7_USB_100mA;
ma = 100;
} else {
bits = PCF50633_MBCC7_USB_SUSPEND;
ma = 0;
}
ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC7,
PCF50633_MBCC7_USB_MASK, bits);
if (ret)
dev_err(pcf->dev, "error setting usb curlim to %d mA\n", ma);
else
dev_info(pcf->dev, "usb curlim to %d mA\n", ma);
/*
* We limit the charging current to be the USB current limit.
* The reason is that on pcf50633, when it enters PMU Standby mode,
* which it does when the device goes "off", the USB current limit
* reverts to the variant default. In at least one common case, that
* default is 500mA. By setting the charging current to be the same
* as the USB limit we set here before PMU standby, we enforce it only
* using the correct amount of current even when the USB current limit
* gets reset to the wrong thing
*/
if (mbc->pcf->pdata->charger_reference_current_ma) {
mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma;
if (mbcc5 > 255)
mbcc5 = 255;
pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5);
}
mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
/* If chgmod == BATFULL, setting chgena has no effect.
* Datasheet says we need to set resume instead but when autoresume is
* used resume doesn't work. Clear and set chgena instead.
*/
if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL)
pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
else {
pcf50633_reg_clear_bits(pcf, PCF50633_REG_MBCC1,
PCF50633_MBCC1_CHGENA);
pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
}
power_supply_changed(mbc->usb);
return ret;
}
EXPORT_SYMBOL_GPL(pcf50633_mbc_usb_curlim_set);
int pcf50633_mbc_get_status(struct pcf50633 *pcf)
{
struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
int status = 0;
u8 chgmod;
if (!mbc)
return 0;
chgmod = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2)
& PCF50633_MBCS2_MBC_MASK;
if (mbc->usb_online)
status |= PCF50633_MBC_USB_ONLINE;
if (chgmod == PCF50633_MBCS2_MBC_USB_PRE ||
chgmod == PCF50633_MBCS2_MBC_USB_PRE_WAIT ||
chgmod == PCF50633_MBCS2_MBC_USB_FAST ||
chgmod == PCF50633_MBCS2_MBC_USB_FAST_WAIT)
status |= PCF50633_MBC_USB_ACTIVE;
if (mbc->adapter_online)
status |= PCF50633_MBC_ADAPTER_ONLINE;
if (chgmod == PCF50633_MBCS2_MBC_ADP_PRE ||
chgmod == PCF50633_MBCS2_MBC_ADP_PRE_WAIT ||
chgmod == PCF50633_MBCS2_MBC_ADP_FAST ||
chgmod == PCF50633_MBCS2_MBC_ADP_FAST_WAIT)
status |= PCF50633_MBC_ADAPTER_ACTIVE;
return status;
}
EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status);
int pcf50633_mbc_get_usb_online_status(struct pcf50633 *pcf)
{
struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
if (!mbc)
return 0;
return mbc->usb_online;
}
EXPORT_SYMBOL_GPL(pcf50633_mbc_get_usb_online_status);
static ssize_t
show_chgmode(struct device *dev, struct device_attribute *attr, char *buf)
{
struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
u8 mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
u8 chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
return sysfs_emit(buf, "%d\n", chgmod);
}
static DEVICE_ATTR(chgmode, S_IRUGO, show_chgmode, NULL);
static ssize_t
show_usblim(struct device *dev, struct device_attribute *attr, char *buf)
{
struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
PCF50633_MBCC7_USB_MASK;
unsigned int ma;
if (usblim == PCF50633_MBCC7_USB_1000mA)
ma = 1000;
else if (usblim == PCF50633_MBCC7_USB_500mA)
ma = 500;
else if (usblim == PCF50633_MBCC7_USB_100mA)
ma = 100;
else
ma = 0;
return sysfs_emit(buf, "%u\n", ma);
}
static ssize_t set_usblim(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
unsigned long ma;
int ret;
ret = kstrtoul(buf, 10, &ma);
if (ret)
return ret;
pcf50633_mbc_usb_curlim_set(mbc->pcf, ma);
return count;
}
static DEVICE_ATTR(usb_curlim, S_IRUGO | S_IWUSR, show_usblim, set_usblim);
static ssize_t
show_chglim(struct device *dev, struct device_attribute *attr, char *buf)
{
struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
u8 mbcc5 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC5);
unsigned int ma;
if (!mbc->pcf->pdata->charger_reference_current_ma)
return -ENODEV;
ma = (mbc->pcf->pdata->charger_reference_current_ma * mbcc5) >> 8;
return sysfs_emit(buf, "%u\n", ma);
}
static ssize_t set_chglim(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
unsigned long ma;
unsigned int mbcc5;
int ret;
if (!mbc->pcf->pdata->charger_reference_current_ma)
return -ENODEV;
ret = kstrtoul(buf, 10, &ma);
if (ret)
return ret;
mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma;
if (mbcc5 > 255)
mbcc5 = 255;
pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5);
return count;
}
/*
* This attribute allows to change MBC charging limit on the fly
* independently of usb current limit. It also gets set automatically every
* time usb current limit is changed.
*/
static DEVICE_ATTR(chg_curlim, S_IRUGO | S_IWUSR, show_chglim, set_chglim);
static struct attribute *pcf50633_mbc_sysfs_attrs[] = {
&dev_attr_chgmode.attr,
&dev_attr_usb_curlim.attr,
&dev_attr_chg_curlim.attr,
NULL,
};
ATTRIBUTE_GROUPS(pcf50633_mbc_sysfs);
static void
pcf50633_mbc_irq_handler(int irq, void *data)
{
struct pcf50633_mbc *mbc = data;
/* USB */
if (irq == PCF50633_IRQ_USBINS) {
mbc->usb_online = 1;
} else if (irq == PCF50633_IRQ_USBREM) {
mbc->usb_online = 0;
pcf50633_mbc_usb_curlim_set(mbc->pcf, 0);
}
/* Adapter */
if (irq == PCF50633_IRQ_ADPINS)
mbc->adapter_online = 1;
else if (irq == PCF50633_IRQ_ADPREM)
mbc->adapter_online = 0;
power_supply_changed(mbc->ac);
power_supply_changed(mbc->usb);
power_supply_changed(mbc->adapter);
if (mbc->pcf->pdata->mbc_event_callback)
mbc->pcf->pdata->mbc_event_callback(mbc->pcf, irq);
}
static int adapter_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct pcf50633_mbc *mbc = power_supply_get_drvdata(psy);
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = mbc->adapter_online;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int usb_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct pcf50633_mbc *mbc = power_supply_get_drvdata(psy);
int ret = 0;
u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
PCF50633_MBCC7_USB_MASK;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = mbc->usb_online &&
(usblim <= PCF50633_MBCC7_USB_500mA);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int ac_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct pcf50633_mbc *mbc = power_supply_get_drvdata(psy);
int ret = 0;
u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
PCF50633_MBCC7_USB_MASK;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = mbc->usb_online &&
(usblim == PCF50633_MBCC7_USB_1000mA);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static enum power_supply_property power_props[] = {
POWER_SUPPLY_PROP_ONLINE,
};
static const u8 mbc_irq_handlers[] = {
PCF50633_IRQ_ADPINS,
PCF50633_IRQ_ADPREM,
PCF50633_IRQ_USBINS,
PCF50633_IRQ_USBREM,
PCF50633_IRQ_BATFULL,
PCF50633_IRQ_CHGHALT,
PCF50633_IRQ_THLIMON,
PCF50633_IRQ_THLIMOFF,
PCF50633_IRQ_USBLIMON,
PCF50633_IRQ_USBLIMOFF,
PCF50633_IRQ_LOWSYS,
PCF50633_IRQ_LOWBAT,
};
static const struct power_supply_desc pcf50633_mbc_adapter_desc = {
.name = "adapter",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = power_props,
.num_properties = ARRAY_SIZE(power_props),
.get_property = &adapter_get_property,
};
static const struct power_supply_desc pcf50633_mbc_usb_desc = {
.name = "usb",
.type = POWER_SUPPLY_TYPE_USB,
.properties = power_props,
.num_properties = ARRAY_SIZE(power_props),
.get_property = usb_get_property,
};
static const struct power_supply_desc pcf50633_mbc_ac_desc = {
.name = "ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = power_props,
.num_properties = ARRAY_SIZE(power_props),
.get_property = ac_get_property,
};
static int pcf50633_mbc_probe(struct platform_device *pdev)
{
struct power_supply_config psy_cfg = {};
struct power_supply_config usb_psy_cfg;
struct pcf50633_mbc *mbc;
int i;
u8 mbcs1;
mbc = devm_kzalloc(&pdev->dev, sizeof(*mbc), GFP_KERNEL);
if (!mbc)
return -ENOMEM;
platform_set_drvdata(pdev, mbc);
mbc->pcf = dev_to_pcf50633(pdev->dev.parent);
/* Set up IRQ handlers */
for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
pcf50633_register_irq(mbc->pcf, mbc_irq_handlers[i],
pcf50633_mbc_irq_handler, mbc);
psy_cfg.supplied_to = mbc->pcf->pdata->batteries;
psy_cfg.num_supplicants = mbc->pcf->pdata->num_batteries;
psy_cfg.drv_data = mbc;
/* Create power supplies */
mbc->adapter = power_supply_register(&pdev->dev,
&pcf50633_mbc_adapter_desc,
&psy_cfg);
if (IS_ERR(mbc->adapter)) {
dev_err(mbc->pcf->dev, "failed to register adapter\n");
return PTR_ERR(mbc->adapter);
}
usb_psy_cfg = psy_cfg;
usb_psy_cfg.attr_grp = pcf50633_mbc_sysfs_groups;
mbc->usb = power_supply_register(&pdev->dev, &pcf50633_mbc_usb_desc,
&usb_psy_cfg);
if (IS_ERR(mbc->usb)) {
dev_err(mbc->pcf->dev, "failed to register usb\n");
power_supply_unregister(mbc->adapter);
return PTR_ERR(mbc->usb);
}
mbc->ac = power_supply_register(&pdev->dev, &pcf50633_mbc_ac_desc,
&psy_cfg);
if (IS_ERR(mbc->ac)) {
dev_err(mbc->pcf->dev, "failed to register ac\n");
power_supply_unregister(mbc->adapter);
power_supply_unregister(mbc->usb);
return PTR_ERR(mbc->ac);
}
mbcs1 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS1);
if (mbcs1 & PCF50633_MBCS1_USBPRES)
pcf50633_mbc_irq_handler(PCF50633_IRQ_USBINS, mbc);
if (mbcs1 & PCF50633_MBCS1_ADAPTPRES)
pcf50633_mbc_irq_handler(PCF50633_IRQ_ADPINS, mbc);
return 0;
}
static int pcf50633_mbc_remove(struct platform_device *pdev)
{
struct pcf50633_mbc *mbc = platform_get_drvdata(pdev);
int i;
/* Remove IRQ handlers */
for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
pcf50633_free_irq(mbc->pcf, mbc_irq_handlers[i]);
power_supply_unregister(mbc->usb);
power_supply_unregister(mbc->adapter);
power_supply_unregister(mbc->ac);
return 0;
}
static struct platform_driver pcf50633_mbc_driver = {
.driver = {
.name = "pcf50633-mbc",
},
.probe = pcf50633_mbc_probe,
.remove = pcf50633_mbc_remove,
};
module_platform_driver(pcf50633_mbc_driver);
MODULE_AUTHOR("Balaji Rao <[email protected]>");
MODULE_DESCRIPTION("PCF50633 mbc driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pcf50633-mbc");
| linux-master | drivers/power/supply/pcf50633-charger.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* 1-wire client/driver for the Maxim/Dallas DS2781 Stand-Alone Fuel Gauge IC
*
* Author: Renata Sayakhova <[email protected]>
*
* Based on ds2780_battery drivers
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/param.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/idr.h>
#include <linux/w1.h>
#include "../../w1/slaves/w1_ds2781.h"
/* Current unit measurement in uA for a 1 milli-ohm sense resistor */
#define DS2781_CURRENT_UNITS 1563
/* Charge unit measurement in uAh for a 1 milli-ohm sense resistor */
#define DS2781_CHARGE_UNITS 6250
/* Number of bytes in user EEPROM space */
#define DS2781_USER_EEPROM_SIZE (DS2781_EEPROM_BLOCK0_END - \
DS2781_EEPROM_BLOCK0_START + 1)
/* Number of bytes in parameter EEPROM space */
#define DS2781_PARAM_EEPROM_SIZE (DS2781_EEPROM_BLOCK1_END - \
DS2781_EEPROM_BLOCK1_START + 1)
struct ds2781_device_info {
struct device *dev;
struct power_supply *bat;
struct power_supply_desc bat_desc;
struct device *w1_dev;
};
enum current_types {
CURRENT_NOW,
CURRENT_AVG,
};
static const char model[] = "DS2781";
static const char manufacturer[] = "Maxim/Dallas";
static inline struct ds2781_device_info *
to_ds2781_device_info(struct power_supply *psy)
{
return power_supply_get_drvdata(psy);
}
static inline int ds2781_battery_io(struct ds2781_device_info *dev_info,
char *buf, int addr, size_t count, int io)
{
return w1_ds2781_io(dev_info->w1_dev, buf, addr, count, io);
}
static int w1_ds2781_read(struct ds2781_device_info *dev_info, char *buf,
int addr, size_t count)
{
return ds2781_battery_io(dev_info, buf, addr, count, 0);
}
static inline int ds2781_read8(struct ds2781_device_info *dev_info, u8 *val,
int addr)
{
return ds2781_battery_io(dev_info, val, addr, sizeof(u8), 0);
}
static int ds2781_read16(struct ds2781_device_info *dev_info, s16 *val,
int addr)
{
int ret;
u8 raw[2];
ret = ds2781_battery_io(dev_info, raw, addr, sizeof(raw), 0);
if (ret < 0)
return ret;
*val = (raw[0] << 8) | raw[1];
return 0;
}
static inline int ds2781_read_block(struct ds2781_device_info *dev_info,
u8 *val, int addr, size_t count)
{
return ds2781_battery_io(dev_info, val, addr, count, 0);
}
static inline int ds2781_write(struct ds2781_device_info *dev_info, u8 *val,
int addr, size_t count)
{
return ds2781_battery_io(dev_info, val, addr, count, 1);
}
static inline int ds2781_store_eeprom(struct device *dev, int addr)
{
return w1_ds2781_eeprom_cmd(dev, addr, W1_DS2781_COPY_DATA);
}
static inline int ds2781_recall_eeprom(struct device *dev, int addr)
{
return w1_ds2781_eeprom_cmd(dev, addr, W1_DS2781_RECALL_DATA);
}
static int ds2781_save_eeprom(struct ds2781_device_info *dev_info, int reg)
{
int ret;
ret = ds2781_store_eeprom(dev_info->w1_dev, reg);
if (ret < 0)
return ret;
ret = ds2781_recall_eeprom(dev_info->w1_dev, reg);
if (ret < 0)
return ret;
return 0;
}
/* Set sense resistor value in mhos */
static int ds2781_set_sense_register(struct ds2781_device_info *dev_info,
u8 conductance)
{
int ret;
ret = ds2781_write(dev_info, &conductance,
DS2781_RSNSP, sizeof(u8));
if (ret < 0)
return ret;
return ds2781_save_eeprom(dev_info, DS2781_RSNSP);
}
/* Get RSGAIN value from 0 to 1.999 in steps of 0.001 */
static int ds2781_get_rsgain_register(struct ds2781_device_info *dev_info,
u16 *rsgain)
{
return ds2781_read16(dev_info, rsgain, DS2781_RSGAIN_MSB);
}
/* Set RSGAIN value from 0 to 1.999 in steps of 0.001 */
static int ds2781_set_rsgain_register(struct ds2781_device_info *dev_info,
u16 rsgain)
{
int ret;
u8 raw[] = {rsgain >> 8, rsgain & 0xFF};
ret = ds2781_write(dev_info, raw,
DS2781_RSGAIN_MSB, sizeof(raw));
if (ret < 0)
return ret;
return ds2781_save_eeprom(dev_info, DS2781_RSGAIN_MSB);
}
static int ds2781_get_voltage(struct ds2781_device_info *dev_info,
int *voltage_uV)
{
int ret;
char val[2];
int voltage_raw;
ret = w1_ds2781_read(dev_info, val, DS2781_VOLT_MSB, 2 * sizeof(u8));
if (ret < 0)
return ret;
/*
* The voltage value is located in 10 bits across the voltage MSB
* and LSB registers in two's complement form
* Sign bit of the voltage value is in bit 7 of the voltage MSB register
* Bits 9 - 3 of the voltage value are in bits 6 - 0 of the
* voltage MSB register
* Bits 2 - 0 of the voltage value are in bits 7 - 5 of the
* voltage LSB register
*/
voltage_raw = (val[0] << 3) |
(val[1] >> 5);
/* DS2781 reports voltage in units of 9.76mV, but the battery class
* reports in units of uV, so convert by multiplying by 9760. */
*voltage_uV = voltage_raw * 9760;
return 0;
}
static int ds2781_get_temperature(struct ds2781_device_info *dev_info,
int *temp)
{
int ret;
char val[2];
int temp_raw;
ret = w1_ds2781_read(dev_info, val, DS2781_TEMP_MSB, 2 * sizeof(u8));
if (ret < 0)
return ret;
/*
* The temperature value is located in 10 bits across the temperature
* MSB and LSB registers in two's complement form
* Sign bit of the temperature value is in bit 7 of the temperature
* MSB register
* Bits 9 - 3 of the temperature value are in bits 6 - 0 of the
* temperature MSB register
* Bits 2 - 0 of the temperature value are in bits 7 - 5 of the
* temperature LSB register
*/
temp_raw = ((val[0]) << 3) |
(val[1] >> 5);
*temp = temp_raw + (temp_raw / 4);
return 0;
}
static int ds2781_get_current(struct ds2781_device_info *dev_info,
enum current_types type, int *current_uA)
{
int ret, sense_res;
s16 current_raw;
u8 sense_res_raw, reg_msb;
/*
* The units of measurement for current are dependent on the value of
* the sense resistor.
*/
ret = ds2781_read8(dev_info, &sense_res_raw, DS2781_RSNSP);
if (ret < 0)
return ret;
if (sense_res_raw == 0) {
dev_err(dev_info->dev, "sense resistor value is 0\n");
return -EINVAL;
}
sense_res = 1000 / sense_res_raw;
if (type == CURRENT_NOW)
reg_msb = DS2781_CURRENT_MSB;
else if (type == CURRENT_AVG)
reg_msb = DS2781_IAVG_MSB;
else
return -EINVAL;
/*
* The current value is located in 16 bits across the current MSB
* and LSB registers in two's complement form
* Sign bit of the current value is in bit 7 of the current MSB register
* Bits 14 - 8 of the current value are in bits 6 - 0 of the current
* MSB register
* Bits 7 - 0 of the current value are in bits 7 - 0 of the current
* LSB register
*/
ret = ds2781_read16(dev_info, ¤t_raw, reg_msb);
if (ret < 0)
return ret;
*current_uA = current_raw * (DS2781_CURRENT_UNITS / sense_res);
return 0;
}
static int ds2781_get_accumulated_current(struct ds2781_device_info *dev_info,
int *accumulated_current)
{
int ret, sense_res;
s16 current_raw;
u8 sense_res_raw;
/*
* The units of measurement for accumulated current are dependent on
* the value of the sense resistor.
*/
ret = ds2781_read8(dev_info, &sense_res_raw, DS2781_RSNSP);
if (ret < 0)
return ret;
if (sense_res_raw == 0) {
dev_err(dev_info->dev, "sense resistor value is 0\n");
return -EINVAL;
}
sense_res = 1000 / sense_res_raw;
/*
* The ACR value is located in 16 bits across the ACR MSB and
* LSB registers
* Bits 15 - 8 of the ACR value are in bits 7 - 0 of the ACR
* MSB register
* Bits 7 - 0 of the ACR value are in bits 7 - 0 of the ACR
* LSB register
*/
ret = ds2781_read16(dev_info, ¤t_raw, DS2781_ACR_MSB);
if (ret < 0)
return ret;
*accumulated_current = current_raw * (DS2781_CHARGE_UNITS / sense_res);
return 0;
}
static int ds2781_get_capacity(struct ds2781_device_info *dev_info,
int *capacity)
{
int ret;
u8 raw;
ret = ds2781_read8(dev_info, &raw, DS2781_RARC);
if (ret < 0)
return ret;
*capacity = raw;
return 0;
}
static int ds2781_get_status(struct ds2781_device_info *dev_info, int *status)
{
int ret, current_uA, capacity;
ret = ds2781_get_current(dev_info, CURRENT_NOW, ¤t_uA);
if (ret < 0)
return ret;
ret = ds2781_get_capacity(dev_info, &capacity);
if (ret < 0)
return ret;
if (power_supply_am_i_supplied(dev_info->bat)) {
if (capacity == 100)
*status = POWER_SUPPLY_STATUS_FULL;
else if (current_uA > 50000)
*status = POWER_SUPPLY_STATUS_CHARGING;
else
*status = POWER_SUPPLY_STATUS_NOT_CHARGING;
} else {
*status = POWER_SUPPLY_STATUS_DISCHARGING;
}
return 0;
}
static int ds2781_get_charge_now(struct ds2781_device_info *dev_info,
int *charge_now)
{
int ret;
u16 charge_raw;
/*
* The RAAC value is located in 16 bits across the RAAC MSB and
* LSB registers
* Bits 15 - 8 of the RAAC value are in bits 7 - 0 of the RAAC
* MSB register
* Bits 7 - 0 of the RAAC value are in bits 7 - 0 of the RAAC
* LSB register
*/
ret = ds2781_read16(dev_info, &charge_raw, DS2781_RAAC_MSB);
if (ret < 0)
return ret;
*charge_now = charge_raw * 1600;
return 0;
}
static int ds2781_get_control_register(struct ds2781_device_info *dev_info,
u8 *control_reg)
{
return ds2781_read8(dev_info, control_reg, DS2781_CONTROL);
}
static int ds2781_set_control_register(struct ds2781_device_info *dev_info,
u8 control_reg)
{
int ret;
ret = ds2781_write(dev_info, &control_reg,
DS2781_CONTROL, sizeof(u8));
if (ret < 0)
return ret;
return ds2781_save_eeprom(dev_info, DS2781_CONTROL);
}
static int ds2781_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
int ret = 0;
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
switch (psp) {
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = ds2781_get_voltage(dev_info, &val->intval);
break;
case POWER_SUPPLY_PROP_TEMP:
ret = ds2781_get_temperature(dev_info, &val->intval);
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = model;
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = manufacturer;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = ds2781_get_current(dev_info, CURRENT_NOW, &val->intval);
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
ret = ds2781_get_current(dev_info, CURRENT_AVG, &val->intval);
break;
case POWER_SUPPLY_PROP_STATUS:
ret = ds2781_get_status(dev_info, &val->intval);
break;
case POWER_SUPPLY_PROP_CAPACITY:
ret = ds2781_get_capacity(dev_info, &val->intval);
break;
case POWER_SUPPLY_PROP_CHARGE_COUNTER:
ret = ds2781_get_accumulated_current(dev_info, &val->intval);
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
ret = ds2781_get_charge_now(dev_info, &val->intval);
break;
default:
ret = -EINVAL;
}
return ret;
}
static enum power_supply_property ds2781_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CHARGE_COUNTER,
POWER_SUPPLY_PROP_CHARGE_NOW,
};
static ssize_t ds2781_get_pmod_enabled(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int ret;
u8 control_reg;
struct power_supply *psy = to_power_supply(dev);
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
/* Get power mode */
ret = ds2781_get_control_register(dev_info, &control_reg);
if (ret < 0)
return ret;
return sysfs_emit(buf, "%d\n",
!!(control_reg & DS2781_CONTROL_PMOD));
}
static ssize_t ds2781_set_pmod_enabled(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
int ret;
u8 control_reg, new_setting;
struct power_supply *psy = to_power_supply(dev);
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
/* Set power mode */
ret = ds2781_get_control_register(dev_info, &control_reg);
if (ret < 0)
return ret;
ret = kstrtou8(buf, 0, &new_setting);
if (ret < 0)
return ret;
if ((new_setting != 0) && (new_setting != 1)) {
dev_err(dev_info->dev, "Invalid pmod setting (0 or 1)\n");
return -EINVAL;
}
if (new_setting)
control_reg |= DS2781_CONTROL_PMOD;
else
control_reg &= ~DS2781_CONTROL_PMOD;
ret = ds2781_set_control_register(dev_info, control_reg);
if (ret < 0)
return ret;
return count;
}
static ssize_t ds2781_get_sense_resistor_value(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int ret;
u8 sense_resistor;
struct power_supply *psy = to_power_supply(dev);
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
ret = ds2781_read8(dev_info, &sense_resistor, DS2781_RSNSP);
if (ret < 0)
return ret;
ret = sysfs_emit(buf, "%d\n", sense_resistor);
return ret;
}
static ssize_t ds2781_set_sense_resistor_value(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
int ret;
u8 new_setting;
struct power_supply *psy = to_power_supply(dev);
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
ret = kstrtou8(buf, 0, &new_setting);
if (ret < 0)
return ret;
ret = ds2781_set_sense_register(dev_info, new_setting);
if (ret < 0)
return ret;
return count;
}
static ssize_t ds2781_get_rsgain_setting(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int ret;
u16 rsgain;
struct power_supply *psy = to_power_supply(dev);
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
ret = ds2781_get_rsgain_register(dev_info, &rsgain);
if (ret < 0)
return ret;
return sysfs_emit(buf, "%d\n", rsgain);
}
static ssize_t ds2781_set_rsgain_setting(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
int ret;
u16 new_setting;
struct power_supply *psy = to_power_supply(dev);
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
ret = kstrtou16(buf, 0, &new_setting);
if (ret < 0)
return ret;
/* Gain can only be from 0 to 1.999 in steps of .001 */
if (new_setting > 1999) {
dev_err(dev_info->dev, "Invalid rsgain setting (0 - 1999)\n");
return -EINVAL;
}
ret = ds2781_set_rsgain_register(dev_info, new_setting);
if (ret < 0)
return ret;
return count;
}
static ssize_t ds2781_get_pio_pin(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int ret;
u8 sfr;
struct power_supply *psy = to_power_supply(dev);
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
ret = ds2781_read8(dev_info, &sfr, DS2781_SFR);
if (ret < 0)
return ret;
ret = sysfs_emit(buf, "%d\n", sfr & DS2781_SFR_PIOSC);
return ret;
}
static ssize_t ds2781_set_pio_pin(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
int ret;
u8 new_setting;
struct power_supply *psy = to_power_supply(dev);
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
ret = kstrtou8(buf, 0, &new_setting);
if (ret < 0)
return ret;
if ((new_setting != 0) && (new_setting != 1)) {
dev_err(dev_info->dev, "Invalid pio_pin setting (0 or 1)\n");
return -EINVAL;
}
ret = ds2781_write(dev_info, &new_setting,
DS2781_SFR, sizeof(u8));
if (ret < 0)
return ret;
return count;
}
static ssize_t ds2781_read_param_eeprom_bin(struct file *filp,
struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct device *dev = kobj_to_dev(kobj);
struct power_supply *psy = to_power_supply(dev);
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
return ds2781_read_block(dev_info, buf,
DS2781_EEPROM_BLOCK1_START + off, count);
}
static ssize_t ds2781_write_param_eeprom_bin(struct file *filp,
struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct device *dev = kobj_to_dev(kobj);
struct power_supply *psy = to_power_supply(dev);
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
int ret;
ret = ds2781_write(dev_info, buf,
DS2781_EEPROM_BLOCK1_START + off, count);
if (ret < 0)
return ret;
ret = ds2781_save_eeprom(dev_info, DS2781_EEPROM_BLOCK1_START);
if (ret < 0)
return ret;
return count;
}
static struct bin_attribute ds2781_param_eeprom_bin_attr = {
.attr = {
.name = "param_eeprom",
.mode = S_IRUGO | S_IWUSR,
},
.size = DS2781_PARAM_EEPROM_SIZE,
.read = ds2781_read_param_eeprom_bin,
.write = ds2781_write_param_eeprom_bin,
};
static ssize_t ds2781_read_user_eeprom_bin(struct file *filp,
struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct device *dev = kobj_to_dev(kobj);
struct power_supply *psy = to_power_supply(dev);
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
return ds2781_read_block(dev_info, buf,
DS2781_EEPROM_BLOCK0_START + off, count);
}
static ssize_t ds2781_write_user_eeprom_bin(struct file *filp,
struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct device *dev = kobj_to_dev(kobj);
struct power_supply *psy = to_power_supply(dev);
struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
int ret;
ret = ds2781_write(dev_info, buf,
DS2781_EEPROM_BLOCK0_START + off, count);
if (ret < 0)
return ret;
ret = ds2781_save_eeprom(dev_info, DS2781_EEPROM_BLOCK0_START);
if (ret < 0)
return ret;
return count;
}
static struct bin_attribute ds2781_user_eeprom_bin_attr = {
.attr = {
.name = "user_eeprom",
.mode = S_IRUGO | S_IWUSR,
},
.size = DS2781_USER_EEPROM_SIZE,
.read = ds2781_read_user_eeprom_bin,
.write = ds2781_write_user_eeprom_bin,
};
static DEVICE_ATTR(pmod_enabled, S_IRUGO | S_IWUSR, ds2781_get_pmod_enabled,
ds2781_set_pmod_enabled);
static DEVICE_ATTR(sense_resistor_value, S_IRUGO | S_IWUSR,
ds2781_get_sense_resistor_value, ds2781_set_sense_resistor_value);
static DEVICE_ATTR(rsgain_setting, S_IRUGO | S_IWUSR, ds2781_get_rsgain_setting,
ds2781_set_rsgain_setting);
static DEVICE_ATTR(pio_pin, S_IRUGO | S_IWUSR, ds2781_get_pio_pin,
ds2781_set_pio_pin);
static struct attribute *ds2781_sysfs_attrs[] = {
&dev_attr_pmod_enabled.attr,
&dev_attr_sense_resistor_value.attr,
&dev_attr_rsgain_setting.attr,
&dev_attr_pio_pin.attr,
NULL
};
static struct bin_attribute *ds2781_sysfs_bin_attrs[] = {
&ds2781_param_eeprom_bin_attr,
&ds2781_user_eeprom_bin_attr,
NULL,
};
static const struct attribute_group ds2781_sysfs_group = {
.attrs = ds2781_sysfs_attrs,
.bin_attrs = ds2781_sysfs_bin_attrs,
};
static const struct attribute_group *ds2781_sysfs_groups[] = {
&ds2781_sysfs_group,
NULL,
};
static int ds2781_battery_probe(struct platform_device *pdev)
{
struct power_supply_config psy_cfg = {};
struct ds2781_device_info *dev_info;
dev_info = devm_kzalloc(&pdev->dev, sizeof(*dev_info), GFP_KERNEL);
if (!dev_info)
return -ENOMEM;
platform_set_drvdata(pdev, dev_info);
dev_info->dev = &pdev->dev;
dev_info->w1_dev = pdev->dev.parent;
dev_info->bat_desc.name = dev_name(&pdev->dev);
dev_info->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY;
dev_info->bat_desc.properties = ds2781_battery_props;
dev_info->bat_desc.num_properties = ARRAY_SIZE(ds2781_battery_props);
dev_info->bat_desc.get_property = ds2781_battery_get_property;
psy_cfg.drv_data = dev_info;
psy_cfg.attr_grp = ds2781_sysfs_groups;
dev_info->bat = devm_power_supply_register(&pdev->dev,
&dev_info->bat_desc,
&psy_cfg);
if (IS_ERR(dev_info->bat)) {
dev_err(dev_info->dev, "failed to register battery\n");
return PTR_ERR(dev_info->bat);
}
return 0;
}
static struct platform_driver ds2781_battery_driver = {
.driver = {
.name = "ds2781-battery",
},
.probe = ds2781_battery_probe,
};
module_platform_driver(ds2781_battery_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Renata Sayakhova <[email protected]>");
MODULE_DESCRIPTION("Maxim/Dallas DS2781 Stand-Alone Fuel Gauge IC driver");
MODULE_ALIAS("platform:ds2781-battery");
| linux-master | drivers/power/supply/ds2781_battery.c |
// SPDX-License-Identifier: GPL-2.0
//
// Copyright (C) 2018 BayLibre SAS
// Author: Bartosz Golaszewski <[email protected]>
//
// Battery charger driver for MAXIM 77650/77651 charger/power-supply.
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/mfd/max77650.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#define MAX77650_CHARGER_ENABLED BIT(0)
#define MAX77650_CHARGER_DISABLED 0x00
#define MAX77650_CHARGER_CHG_EN_MASK BIT(0)
#define MAX77650_CHG_DETAILS_MASK GENMASK(7, 4)
#define MAX77650_CHG_DETAILS_BITS(_reg) \
(((_reg) & MAX77650_CHG_DETAILS_MASK) >> 4)
/* Charger is OFF. */
#define MAX77650_CHG_OFF 0x00
/* Charger is in prequalification mode. */
#define MAX77650_CHG_PREQ 0x01
/* Charger is in fast-charge constant current mode. */
#define MAX77650_CHG_ON_CURR 0x02
/* Charger is in JEITA modified fast-charge constant-current mode. */
#define MAX77650_CHG_ON_CURR_JEITA 0x03
/* Charger is in fast-charge constant-voltage mode. */
#define MAX77650_CHG_ON_VOLT 0x04
/* Charger is in JEITA modified fast-charge constant-voltage mode. */
#define MAX77650_CHG_ON_VOLT_JEITA 0x05
/* Charger is in top-off mode. */
#define MAX77650_CHG_ON_TOPOFF 0x06
/* Charger is in JEITA modified top-off mode. */
#define MAX77650_CHG_ON_TOPOFF_JEITA 0x07
/* Charger is done. */
#define MAX77650_CHG_DONE 0x08
/* Charger is JEITA modified done. */
#define MAX77650_CHG_DONE_JEITA 0x09
/* Charger is suspended due to a prequalification timer fault. */
#define MAX77650_CHG_SUSP_PREQ_TIM_FAULT 0x0a
/* Charger is suspended due to a fast-charge timer fault. */
#define MAX77650_CHG_SUSP_FAST_CHG_TIM_FAULT 0x0b
/* Charger is suspended due to a battery temperature fault. */
#define MAX77650_CHG_SUSP_BATT_TEMP_FAULT 0x0c
#define MAX77650_CHGIN_DETAILS_MASK GENMASK(3, 2)
#define MAX77650_CHGIN_DETAILS_BITS(_reg) \
(((_reg) & MAX77650_CHGIN_DETAILS_MASK) >> 2)
#define MAX77650_CHGIN_UNDERVOLTAGE_LOCKOUT 0x00
#define MAX77650_CHGIN_OVERVOLTAGE_LOCKOUT 0x01
#define MAX77650_CHGIN_OKAY 0x11
#define MAX77650_CHARGER_CHG_MASK BIT(1)
#define MAX77650_CHARGER_CHG_CHARGING(_reg) \
(((_reg) & MAX77650_CHARGER_CHG_MASK) > 1)
#define MAX77650_CHARGER_VCHGIN_MIN_MASK 0xc0
#define MAX77650_CHARGER_VCHGIN_MIN_SHIFT(_val) ((_val) << 5)
#define MAX77650_CHARGER_ICHGIN_LIM_MASK 0x1c
#define MAX77650_CHARGER_ICHGIN_LIM_SHIFT(_val) ((_val) << 2)
struct max77650_charger_data {
struct regmap *map;
struct device *dev;
};
static enum power_supply_property max77650_charger_properties[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CHARGE_TYPE
};
static const unsigned int max77650_charger_vchgin_min_table[] = {
4000000, 4100000, 4200000, 4300000, 4400000, 4500000, 4600000, 4700000
};
static const unsigned int max77650_charger_ichgin_lim_table[] = {
95000, 190000, 285000, 380000, 475000
};
static int max77650_charger_set_vchgin_min(struct max77650_charger_data *chg,
unsigned int val)
{
int i, rv;
for (i = 0; i < ARRAY_SIZE(max77650_charger_vchgin_min_table); i++) {
if (val == max77650_charger_vchgin_min_table[i]) {
rv = regmap_update_bits(chg->map,
MAX77650_REG_CNFG_CHG_B,
MAX77650_CHARGER_VCHGIN_MIN_MASK,
MAX77650_CHARGER_VCHGIN_MIN_SHIFT(i));
if (rv)
return rv;
return 0;
}
}
return -EINVAL;
}
static int max77650_charger_set_ichgin_lim(struct max77650_charger_data *chg,
unsigned int val)
{
int i, rv;
for (i = 0; i < ARRAY_SIZE(max77650_charger_ichgin_lim_table); i++) {
if (val == max77650_charger_ichgin_lim_table[i]) {
rv = regmap_update_bits(chg->map,
MAX77650_REG_CNFG_CHG_B,
MAX77650_CHARGER_ICHGIN_LIM_MASK,
MAX77650_CHARGER_ICHGIN_LIM_SHIFT(i));
if (rv)
return rv;
return 0;
}
}
return -EINVAL;
}
static int max77650_charger_enable(struct max77650_charger_data *chg)
{
int rv;
rv = regmap_update_bits(chg->map,
MAX77650_REG_CNFG_CHG_B,
MAX77650_CHARGER_CHG_EN_MASK,
MAX77650_CHARGER_ENABLED);
if (rv)
dev_err(chg->dev, "unable to enable the charger: %d\n", rv);
return rv;
}
static void max77650_charger_disable(struct max77650_charger_data *chg)
{
int rv;
rv = regmap_update_bits(chg->map,
MAX77650_REG_CNFG_CHG_B,
MAX77650_CHARGER_CHG_EN_MASK,
MAX77650_CHARGER_DISABLED);
if (rv)
dev_err(chg->dev, "unable to disable the charger: %d\n", rv);
}
static irqreturn_t max77650_charger_check_status(int irq, void *data)
{
struct max77650_charger_data *chg = data;
int rv, reg;
rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, ®);
if (rv) {
dev_err(chg->dev,
"unable to read the charger status: %d\n", rv);
return IRQ_HANDLED;
}
switch (MAX77650_CHGIN_DETAILS_BITS(reg)) {
case MAX77650_CHGIN_UNDERVOLTAGE_LOCKOUT:
dev_err(chg->dev, "undervoltage lockout detected, disabling charger\n");
max77650_charger_disable(chg);
break;
case MAX77650_CHGIN_OVERVOLTAGE_LOCKOUT:
dev_err(chg->dev, "overvoltage lockout detected, disabling charger\n");
max77650_charger_disable(chg);
break;
case MAX77650_CHGIN_OKAY:
max77650_charger_enable(chg);
break;
default:
/* May be 0x10 - debouncing */
break;
}
return IRQ_HANDLED;
}
static int max77650_charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct max77650_charger_data *chg = power_supply_get_drvdata(psy);
int rv, reg;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, ®);
if (rv)
return rv;
if (MAX77650_CHARGER_CHG_CHARGING(reg)) {
val->intval = POWER_SUPPLY_STATUS_CHARGING;
break;
}
switch (MAX77650_CHG_DETAILS_BITS(reg)) {
case MAX77650_CHG_OFF:
case MAX77650_CHG_SUSP_PREQ_TIM_FAULT:
case MAX77650_CHG_SUSP_FAST_CHG_TIM_FAULT:
case MAX77650_CHG_SUSP_BATT_TEMP_FAULT:
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case MAX77650_CHG_PREQ:
case MAX77650_CHG_ON_CURR:
case MAX77650_CHG_ON_CURR_JEITA:
case MAX77650_CHG_ON_VOLT:
case MAX77650_CHG_ON_VOLT_JEITA:
case MAX77650_CHG_ON_TOPOFF:
case MAX77650_CHG_ON_TOPOFF_JEITA:
val->intval = POWER_SUPPLY_STATUS_CHARGING;
break;
case MAX77650_CHG_DONE:
val->intval = POWER_SUPPLY_STATUS_FULL;
break;
default:
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
}
break;
case POWER_SUPPLY_PROP_ONLINE:
rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, ®);
if (rv)
return rv;
val->intval = MAX77650_CHARGER_CHG_CHARGING(reg);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, ®);
if (rv)
return rv;
if (!MAX77650_CHARGER_CHG_CHARGING(reg)) {
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
}
switch (MAX77650_CHG_DETAILS_BITS(reg)) {
case MAX77650_CHG_PREQ:
case MAX77650_CHG_ON_CURR:
case MAX77650_CHG_ON_CURR_JEITA:
case MAX77650_CHG_ON_VOLT:
case MAX77650_CHG_ON_VOLT_JEITA:
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
case MAX77650_CHG_ON_TOPOFF:
case MAX77650_CHG_ON_TOPOFF_JEITA:
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
default:
val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
}
break;
default:
return -EINVAL;
}
return 0;
}
static const struct power_supply_desc max77650_battery_desc = {
.name = "max77650",
.type = POWER_SUPPLY_TYPE_USB,
.get_property = max77650_charger_get_property,
.properties = max77650_charger_properties,
.num_properties = ARRAY_SIZE(max77650_charger_properties),
};
static int max77650_charger_probe(struct platform_device *pdev)
{
struct power_supply_config pscfg = {};
struct max77650_charger_data *chg;
struct power_supply *battery;
struct device *dev, *parent;
int rv, chg_irq, chgin_irq;
unsigned int prop;
dev = &pdev->dev;
parent = dev->parent;
chg = devm_kzalloc(dev, sizeof(*chg), GFP_KERNEL);
if (!chg)
return -ENOMEM;
platform_set_drvdata(pdev, chg);
chg->map = dev_get_regmap(parent, NULL);
if (!chg->map)
return -ENODEV;
chg->dev = dev;
pscfg.of_node = dev->of_node;
pscfg.drv_data = chg;
chg_irq = platform_get_irq_byname(pdev, "CHG");
if (chg_irq < 0)
return chg_irq;
chgin_irq = platform_get_irq_byname(pdev, "CHGIN");
if (chgin_irq < 0)
return chgin_irq;
rv = devm_request_any_context_irq(dev, chg_irq,
max77650_charger_check_status,
IRQF_ONESHOT, "chg", chg);
if (rv < 0)
return rv;
rv = devm_request_any_context_irq(dev, chgin_irq,
max77650_charger_check_status,
IRQF_ONESHOT, "chgin", chg);
if (rv < 0)
return rv;
battery = devm_power_supply_register(dev,
&max77650_battery_desc, &pscfg);
if (IS_ERR(battery))
return PTR_ERR(battery);
rv = of_property_read_u32(dev->of_node,
"input-voltage-min-microvolt", &prop);
if (rv == 0) {
rv = max77650_charger_set_vchgin_min(chg, prop);
if (rv)
return rv;
}
rv = of_property_read_u32(dev->of_node,
"input-current-limit-microamp", &prop);
if (rv == 0) {
rv = max77650_charger_set_ichgin_lim(chg, prop);
if (rv)
return rv;
}
return max77650_charger_enable(chg);
}
static int max77650_charger_remove(struct platform_device *pdev)
{
struct max77650_charger_data *chg = platform_get_drvdata(pdev);
max77650_charger_disable(chg);
return 0;
}
static const struct of_device_id max77650_charger_of_match[] = {
{ .compatible = "maxim,max77650-charger" },
{ }
};
MODULE_DEVICE_TABLE(of, max77650_charger_of_match);
static struct platform_driver max77650_charger_driver = {
.driver = {
.name = "max77650-charger",
.of_match_table = max77650_charger_of_match,
},
.probe = max77650_charger_probe,
.remove = max77650_charger_remove,
};
module_platform_driver(max77650_charger_driver);
MODULE_DESCRIPTION("MAXIM 77650/77651 charger driver");
MODULE_AUTHOR("Bartosz Golaszewski <[email protected]>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:max77650-charger");
| linux-master | drivers/power/supply/max77650-charger.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Maxim MAX14656 / AL32 USB Charger Detector driver
*
* Copyright (C) 2014 LG Electronics, Inc
* Copyright (C) 2016 Alexander Kurz <[email protected]>
*
* Components from Maxim AL32 Charger detection Driver for MX50 Yoshi Board
* Copyright (C) Amazon Technologies Inc. All rights reserved.
* Manish Lachwani ([email protected])
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/power_supply.h>
#include <linux/devm-helpers.h>
#define MAX14656_MANUFACTURER "Maxim Integrated"
#define MAX14656_NAME "max14656"
#define MAX14656_DEVICE_ID 0x00
#define MAX14656_INTERRUPT_1 0x01
#define MAX14656_INTERRUPT_2 0x02
#define MAX14656_STATUS_1 0x03
#define MAX14656_STATUS_2 0x04
#define MAX14656_INTMASK_1 0x05
#define MAX14656_INTMASK_2 0x06
#define MAX14656_CONTROL_1 0x07
#define MAX14656_CONTROL_2 0x08
#define MAX14656_CONTROL_3 0x09
#define DEVICE_VENDOR_MASK 0xf0
#define DEVICE_REV_MASK 0x0f
#define INT_EN_REG_MASK BIT(4)
#define CHG_TYPE_INT_MASK BIT(0)
#define STATUS1_VB_VALID_MASK BIT(4)
#define STATUS1_CHG_TYPE_MASK 0xf
#define INT1_DCD_TIMEOUT_MASK BIT(7)
#define CONTROL1_DEFAULT 0x0d
#define CONTROL1_INT_EN BIT(4)
#define CONTROL1_INT_ACTIVE_HIGH BIT(5)
#define CONTROL1_EDGE BIT(7)
#define CONTROL2_DEFAULT 0x8e
#define CONTROL2_ADC_EN BIT(0)
#define CONTROL3_DEFAULT 0x8d
enum max14656_chg_type {
MAX14656_NO_CHARGER = 0,
MAX14656_SDP_CHARGER,
MAX14656_CDP_CHARGER,
MAX14656_DCP_CHARGER,
MAX14656_APPLE_500MA_CHARGER,
MAX14656_APPLE_1A_CHARGER,
MAX14656_APPLE_2A_CHARGER,
MAX14656_SPECIAL_500MA_CHARGER,
MAX14656_APPLE_12W,
MAX14656_CHARGER_LAST
};
static const struct max14656_chg_type_props {
enum power_supply_type type;
} chg_type_props[] = {
{ POWER_SUPPLY_TYPE_UNKNOWN },
{ POWER_SUPPLY_TYPE_USB },
{ POWER_SUPPLY_TYPE_USB_CDP },
{ POWER_SUPPLY_TYPE_USB_DCP },
{ POWER_SUPPLY_TYPE_USB_DCP },
{ POWER_SUPPLY_TYPE_USB_DCP },
{ POWER_SUPPLY_TYPE_USB_DCP },
{ POWER_SUPPLY_TYPE_USB_DCP },
{ POWER_SUPPLY_TYPE_USB },
};
struct max14656_chip {
struct i2c_client *client;
struct power_supply *detect_psy;
struct power_supply_desc psy_desc;
struct delayed_work irq_work;
int irq;
int online;
};
static int max14656_read_reg(struct i2c_client *client, int reg, u8 *val)
{
s32 ret;
ret = i2c_smbus_read_byte_data(client, reg);
if (ret < 0) {
dev_err(&client->dev,
"i2c read fail: can't read from %02x: %d\n",
reg, ret);
return ret;
}
*val = ret;
return 0;
}
static int max14656_write_reg(struct i2c_client *client, int reg, u8 val)
{
s32 ret;
ret = i2c_smbus_write_byte_data(client, reg, val);
if (ret < 0) {
dev_err(&client->dev,
"i2c write fail: can't write %02x to %02x: %d\n",
val, reg, ret);
return ret;
}
return 0;
}
static int max14656_read_block_reg(struct i2c_client *client, u8 reg,
u8 length, u8 *val)
{
int ret;
ret = i2c_smbus_read_i2c_block_data(client, reg, length, val);
if (ret < 0) {
dev_err(&client->dev, "failed to block read reg 0x%x: %d\n",
reg, ret);
return ret;
}
return 0;
}
#define REG_TOTAL_NUM 5
static void max14656_irq_worker(struct work_struct *work)
{
struct max14656_chip *chip =
container_of(work, struct max14656_chip, irq_work.work);
u8 buf[REG_TOTAL_NUM];
u8 chg_type;
max14656_read_block_reg(chip->client, MAX14656_DEVICE_ID,
REG_TOTAL_NUM, buf);
if ((buf[MAX14656_STATUS_1] & STATUS1_VB_VALID_MASK) &&
(buf[MAX14656_STATUS_1] & STATUS1_CHG_TYPE_MASK)) {
chg_type = buf[MAX14656_STATUS_1] & STATUS1_CHG_TYPE_MASK;
if (chg_type < MAX14656_CHARGER_LAST)
chip->psy_desc.type = chg_type_props[chg_type].type;
else
chip->psy_desc.type = POWER_SUPPLY_TYPE_UNKNOWN;
chip->online = 1;
} else {
chip->online = 0;
chip->psy_desc.type = POWER_SUPPLY_TYPE_UNKNOWN;
}
power_supply_changed(chip->detect_psy);
}
static irqreturn_t max14656_irq(int irq, void *dev_id)
{
struct max14656_chip *chip = dev_id;
schedule_delayed_work(&chip->irq_work, msecs_to_jiffies(100));
return IRQ_HANDLED;
}
static int max14656_hw_init(struct max14656_chip *chip)
{
uint8_t val = 0;
uint8_t rev;
struct i2c_client *client = chip->client;
if (max14656_read_reg(client, MAX14656_DEVICE_ID, &val))
return -ENODEV;
if ((val & DEVICE_VENDOR_MASK) != 0x20) {
dev_err(&client->dev, "wrong vendor ID %d\n",
((val & DEVICE_VENDOR_MASK) >> 4));
return -ENODEV;
}
rev = val & DEVICE_REV_MASK;
/* Turn on ADC_EN */
if (max14656_write_reg(client, MAX14656_CONTROL_2, CONTROL2_ADC_EN))
return -EINVAL;
/* turn on interrupts and low power mode */
if (max14656_write_reg(client, MAX14656_CONTROL_1,
CONTROL1_DEFAULT |
CONTROL1_INT_EN |
CONTROL1_INT_ACTIVE_HIGH |
CONTROL1_EDGE))
return -EINVAL;
if (max14656_write_reg(client, MAX14656_INTMASK_1, 0x3))
return -EINVAL;
if (max14656_write_reg(client, MAX14656_INTMASK_2, 0x1))
return -EINVAL;
dev_info(&client->dev, "detected revision %d\n", rev);
return 0;
}
static int max14656_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct max14656_chip *chip = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = chip->online;
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = MAX14656_NAME;
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = MAX14656_MANUFACTURER;
break;
default:
return -EINVAL;
}
return 0;
}
static enum power_supply_property max14656_battery_props[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static int max14656_probe(struct i2c_client *client)
{
struct i2c_adapter *adapter = client->adapter;
struct device *dev = &client->dev;
struct power_supply_config psy_cfg = {};
struct max14656_chip *chip;
int irq = client->irq;
int ret = 0;
if (irq <= 0) {
dev_err(dev, "invalid irq number: %d\n", irq);
return -ENODEV;
}
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_err(dev, "No support for SMBUS_BYTE_DATA\n");
return -ENODEV;
}
chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
psy_cfg.drv_data = chip;
chip->client = client;
chip->online = 0;
chip->psy_desc.name = MAX14656_NAME;
chip->psy_desc.type = POWER_SUPPLY_TYPE_UNKNOWN;
chip->psy_desc.properties = max14656_battery_props;
chip->psy_desc.num_properties = ARRAY_SIZE(max14656_battery_props);
chip->psy_desc.get_property = max14656_get_property;
chip->irq = irq;
ret = max14656_hw_init(chip);
if (ret)
return -ENODEV;
chip->detect_psy = devm_power_supply_register(dev,
&chip->psy_desc, &psy_cfg);
if (IS_ERR(chip->detect_psy)) {
dev_err(dev, "power_supply_register failed\n");
return -EINVAL;
}
ret = devm_delayed_work_autocancel(dev, &chip->irq_work,
max14656_irq_worker);
if (ret) {
dev_err(dev, "devm_delayed_work_autocancel %d failed\n", ret);
return ret;
}
ret = devm_request_irq(dev, chip->irq, max14656_irq,
IRQF_TRIGGER_FALLING,
MAX14656_NAME, chip);
if (ret) {
dev_err(dev, "request_irq %d failed\n", chip->irq);
return -EINVAL;
}
enable_irq_wake(chip->irq);
schedule_delayed_work(&chip->irq_work, msecs_to_jiffies(2000));
return 0;
}
static const struct i2c_device_id max14656_id[] = {
{ "max14656", 0 },
{}
};
MODULE_DEVICE_TABLE(i2c, max14656_id);
static const struct of_device_id max14656_match_table[] = {
{ .compatible = "maxim,max14656", },
{}
};
MODULE_DEVICE_TABLE(of, max14656_match_table);
static struct i2c_driver max14656_i2c_driver = {
.driver = {
.name = "max14656",
.of_match_table = max14656_match_table,
},
.probe = max14656_probe,
.id_table = max14656_id,
};
module_i2c_driver(max14656_i2c_driver);
MODULE_DESCRIPTION("MAX14656 USB charger detector");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/power/supply/max14656_charger_detector.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* TWL4030/TPS65950 BCI (Battery Charger Interface) driver
*
* Copyright (C) 2010 Gražvydas Ignotas <[email protected]>
*
* based on twl4030_bci_battery.c by TI
* Copyright (C) 2008 Texas Instruments, Inc.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/mfd/twl.h>
#include <linux/power_supply.h>
#include <linux/notifier.h>
#include <linux/usb/otg.h>
#include <linux/iio/consumer.h>
#define TWL4030_BCIMDEN 0x00
#define TWL4030_BCIMDKEY 0x01
#define TWL4030_BCIMSTATEC 0x02
#define TWL4030_BCIICHG 0x08
#define TWL4030_BCIVAC 0x0a
#define TWL4030_BCIVBUS 0x0c
#define TWL4030_BCIMFSTS3 0x0F
#define TWL4030_BCIMFSTS4 0x10
#define TWL4030_BCICTL1 0x23
#define TWL4030_BB_CFG 0x12
#define TWL4030_BCIIREF1 0x27
#define TWL4030_BCIIREF2 0x28
#define TWL4030_BCIMFKEY 0x11
#define TWL4030_BCIMFEN3 0x14
#define TWL4030_BCIMFTH8 0x1d
#define TWL4030_BCIMFTH9 0x1e
#define TWL4030_BCIWDKEY 0x21
#define TWL4030_BCIMFSTS1 0x01
#define TWL4030_BCIAUTOWEN BIT(5)
#define TWL4030_CONFIG_DONE BIT(4)
#define TWL4030_CVENAC BIT(2)
#define TWL4030_BCIAUTOUSB BIT(1)
#define TWL4030_BCIAUTOAC BIT(0)
#define TWL4030_CGAIN BIT(5)
#define TWL4030_USBFASTMCHG BIT(2)
#define TWL4030_STS_VBUS BIT(7)
#define TWL4030_STS_USB_ID BIT(2)
#define TWL4030_BBCHEN BIT(4)
#define TWL4030_BBSEL_MASK 0x0c
#define TWL4030_BBSEL_2V5 0x00
#define TWL4030_BBSEL_3V0 0x04
#define TWL4030_BBSEL_3V1 0x08
#define TWL4030_BBSEL_3V2 0x0c
#define TWL4030_BBISEL_MASK 0x03
#define TWL4030_BBISEL_25uA 0x00
#define TWL4030_BBISEL_150uA 0x01
#define TWL4030_BBISEL_500uA 0x02
#define TWL4030_BBISEL_1000uA 0x03
#define TWL4030_BATSTSPCHG BIT(2)
#define TWL4030_BATSTSMCHG BIT(6)
/* BCI interrupts */
#define TWL4030_WOVF BIT(0) /* Watchdog overflow */
#define TWL4030_TMOVF BIT(1) /* Timer overflow */
#define TWL4030_ICHGHIGH BIT(2) /* Battery charge current high */
#define TWL4030_ICHGLOW BIT(3) /* Battery cc. low / FSM state change */
#define TWL4030_ICHGEOC BIT(4) /* Battery current end-of-charge */
#define TWL4030_TBATOR2 BIT(5) /* Battery temperature out of range 2 */
#define TWL4030_TBATOR1 BIT(6) /* Battery temperature out of range 1 */
#define TWL4030_BATSTS BIT(7) /* Battery status */
#define TWL4030_VBATLVL BIT(0) /* VBAT level */
#define TWL4030_VBATOV BIT(1) /* VBAT overvoltage */
#define TWL4030_VBUSOV BIT(2) /* VBUS overvoltage */
#define TWL4030_ACCHGOV BIT(3) /* Ac charger overvoltage */
#define TWL4030_MSTATEC_USB BIT(4)
#define TWL4030_MSTATEC_AC BIT(5)
#define TWL4030_MSTATEC_MASK 0x0f
#define TWL4030_MSTATEC_QUICK1 0x02
#define TWL4030_MSTATEC_QUICK7 0x07
#define TWL4030_MSTATEC_COMPLETE1 0x0b
#define TWL4030_MSTATEC_COMPLETE4 0x0e
/*
* If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11)
* then AC is available.
*/
static inline int ac_available(struct iio_channel *channel_vac)
{
int val, err;
if (!channel_vac)
return 0;
err = iio_read_channel_processed(channel_vac, &val);
if (err < 0)
return 0;
return val > 4500;
}
static bool allow_usb;
module_param(allow_usb, bool, 0644);
MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current");
struct twl4030_bci {
struct device *dev;
struct power_supply *ac;
struct power_supply *usb;
struct usb_phy *transceiver;
struct notifier_block usb_nb;
struct work_struct work;
int irq_chg;
int irq_bci;
int usb_enabled;
/*
* ichg_* and *_cur values in uA. If any are 'large', we set
* CGAIN to '1' which doubles the range for half the
* precision.
*/
unsigned int ichg_eoc, ichg_lo, ichg_hi;
unsigned int usb_cur, ac_cur;
struct iio_channel *channel_vac;
bool ac_is_active;
int usb_mode, ac_mode; /* charging mode requested */
#define CHARGE_OFF 0
#define CHARGE_AUTO 1
#define CHARGE_LINEAR 2
/* When setting the USB current we slowly increase the
* requested current until target is reached or the voltage
* drops below 4.75V. In the latter case we step back one
* step.
*/
unsigned int usb_cur_target;
struct delayed_work current_worker;
#define USB_CUR_STEP 20000 /* 20mA at a time */
#define USB_MIN_VOLT 4750000 /* 4.75V */
#define USB_CUR_DELAY msecs_to_jiffies(100)
#define USB_MAX_CURRENT 1700000 /* TWL4030 caps at 1.7A */
unsigned long event;
};
/* strings for 'usb_mode' values */
static const char *modes[] = { "off", "auto", "continuous" };
/*
* clear and set bits on an given register on a given module
*/
static int twl4030_clear_set(u8 mod_no, u8 clear, u8 set, u8 reg)
{
u8 val = 0;
int ret;
ret = twl_i2c_read_u8(mod_no, &val, reg);
if (ret)
return ret;
val &= ~clear;
val |= set;
return twl_i2c_write_u8(mod_no, val, reg);
}
static int twl4030_bci_read(u8 reg, u8 *val)
{
return twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, val, reg);
}
static int twl4030_clear_set_boot_bci(u8 clear, u8 set)
{
return twl4030_clear_set(TWL_MODULE_PM_MASTER, clear,
TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set,
TWL4030_PM_MASTER_BOOT_BCI);
}
static int twl4030bci_read_adc_val(u8 reg)
{
int ret, temp;
u8 val;
/* read MSB */
ret = twl4030_bci_read(reg + 1, &val);
if (ret)
return ret;
temp = (int)(val & 0x03) << 8;
/* read LSB */
ret = twl4030_bci_read(reg, &val);
if (ret)
return ret;
return temp | val;
}
/*
* TI provided formulas:
* CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85
* CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7
* Here we use integer approximation of:
* CGAIN == 0: val * 1.6618 - 0.85 * 1000
* CGAIN == 1: (val * 1.6618 - 0.85 * 1000) * 2
*/
/*
* convert twl register value for currents into uA
*/
static int regval2ua(int regval, bool cgain)
{
if (cgain)
return (regval * 16618 - 8500 * 1000) / 5;
else
return (regval * 16618 - 8500 * 1000) / 10;
}
/*
* convert uA currents into twl register value
*/
static int ua2regval(int ua, bool cgain)
{
int ret;
if (cgain)
ua /= 2;
ret = (ua * 10 + 8500 * 1000) / 16618;
/* rounding problems */
if (ret < 512)
ret = 512;
return ret;
}
static int twl4030_charger_update_current(struct twl4030_bci *bci)
{
int status;
int cur;
unsigned reg, cur_reg;
u8 bcictl1, oldreg, fullreg;
bool cgain = false;
u8 boot_bci;
/*
* If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11)
* and AC is enabled, set current for 'ac'
*/
if (ac_available(bci->channel_vac)) {
cur = bci->ac_cur;
bci->ac_is_active = true;
} else {
cur = bci->usb_cur;
bci->ac_is_active = false;
if (cur > bci->usb_cur_target) {
cur = bci->usb_cur_target;
bci->usb_cur = cur;
}
if (cur < bci->usb_cur_target)
schedule_delayed_work(&bci->current_worker, USB_CUR_DELAY);
}
/* First, check thresholds and see if cgain is needed */
if (bci->ichg_eoc >= 200000)
cgain = true;
if (bci->ichg_lo >= 400000)
cgain = true;
if (bci->ichg_hi >= 820000)
cgain = true;
if (cur > 852000)
cgain = true;
status = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1);
if (status < 0)
return status;
if (twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &boot_bci,
TWL4030_PM_MASTER_BOOT_BCI) < 0)
boot_bci = 0;
boot_bci &= 7;
if ((!!cgain) != !!(bcictl1 & TWL4030_CGAIN))
/* Need to turn for charging while we change the
* CGAIN bit. Leave it off while everything is
* updated.
*/
twl4030_clear_set_boot_bci(boot_bci, 0);
/*
* For ichg_eoc, the hardware only supports reg values matching
* 100XXXX000, and requires the XXXX be stored in the high nibble
* of TWL4030_BCIMFTH8.
*/
reg = ua2regval(bci->ichg_eoc, cgain);
if (reg > 0x278)
reg = 0x278;
if (reg < 0x200)
reg = 0x200;
reg = (reg >> 3) & 0xf;
fullreg = reg << 4;
/*
* For ichg_lo, reg value must match 10XXXX0000.
* XXXX is stored in low nibble of TWL4030_BCIMFTH8.
*/
reg = ua2regval(bci->ichg_lo, cgain);
if (reg > 0x2F0)
reg = 0x2F0;
if (reg < 0x200)
reg = 0x200;
reg = (reg >> 4) & 0xf;
fullreg |= reg;
/* ichg_eoc and ichg_lo live in same register */
status = twl4030_bci_read(TWL4030_BCIMFTH8, &oldreg);
if (status < 0)
return status;
if (oldreg != fullreg) {
status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xF4,
TWL4030_BCIMFKEY);
if (status < 0)
return status;
twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE,
fullreg, TWL4030_BCIMFTH8);
}
/* ichg_hi threshold must be 1XXXX01100 (I think) */
reg = ua2regval(bci->ichg_hi, cgain);
if (reg > 0x3E0)
reg = 0x3E0;
if (reg < 0x200)
reg = 0x200;
fullreg = (reg >> 5) & 0xF;
fullreg <<= 4;
status = twl4030_bci_read(TWL4030_BCIMFTH9, &oldreg);
if (status < 0)
return status;
if ((oldreg & 0xF0) != fullreg) {
fullreg |= (oldreg & 0x0F);
status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7,
TWL4030_BCIMFKEY);
if (status < 0)
return status;
twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE,
fullreg, TWL4030_BCIMFTH9);
}
/*
* And finally, set the current. This is stored in
* two registers.
*/
reg = ua2regval(cur, cgain);
/* we have only 10 bits */
if (reg > 0x3ff)
reg = 0x3ff;
status = twl4030_bci_read(TWL4030_BCIIREF1, &oldreg);
if (status < 0)
return status;
cur_reg = oldreg;
status = twl4030_bci_read(TWL4030_BCIIREF2, &oldreg);
if (status < 0)
return status;
cur_reg |= oldreg << 8;
if (reg != oldreg) {
/* disable write protection for one write access for
* BCIIREF */
status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7,
TWL4030_BCIMFKEY);
if (status < 0)
return status;
status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE,
(reg & 0x100) ? 3 : 2,
TWL4030_BCIIREF2);
if (status < 0)
return status;
/* disable write protection for one write access for
* BCIIREF */
status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7,
TWL4030_BCIMFKEY);
if (status < 0)
return status;
status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE,
reg & 0xff,
TWL4030_BCIIREF1);
}
if ((!!cgain) != !!(bcictl1 & TWL4030_CGAIN)) {
/* Flip CGAIN and re-enable charging */
bcictl1 ^= TWL4030_CGAIN;
twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE,
bcictl1, TWL4030_BCICTL1);
twl4030_clear_set_boot_bci(0, boot_bci);
}
return 0;
}
static int twl4030_charger_get_current(void);
static void twl4030_current_worker(struct work_struct *data)
{
int v, curr;
int res;
struct twl4030_bci *bci = container_of(data, struct twl4030_bci,
current_worker.work);
res = twl4030bci_read_adc_val(TWL4030_BCIVBUS);
if (res < 0)
v = 0;
else
/* BCIVBUS uses ADCIN8, 7/1023 V/step */
v = res * 6843;
curr = twl4030_charger_get_current();
dev_dbg(bci->dev, "v=%d cur=%d limit=%d target=%d\n", v, curr,
bci->usb_cur, bci->usb_cur_target);
if (v < USB_MIN_VOLT) {
/* Back up and stop adjusting. */
if (bci->usb_cur >= USB_CUR_STEP)
bci->usb_cur -= USB_CUR_STEP;
bci->usb_cur_target = bci->usb_cur;
} else if (bci->usb_cur >= bci->usb_cur_target ||
bci->usb_cur + USB_CUR_STEP > USB_MAX_CURRENT) {
/* Reached target and voltage is OK - stop */
return;
} else {
bci->usb_cur += USB_CUR_STEP;
schedule_delayed_work(&bci->current_worker, USB_CUR_DELAY);
}
twl4030_charger_update_current(bci);
}
/*
* Enable/Disable USB Charge functionality.
*/
static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
{
int ret;
u32 reg;
if (bci->usb_mode == CHARGE_OFF)
enable = false;
if (enable && !IS_ERR_OR_NULL(bci->transceiver)) {
twl4030_charger_update_current(bci);
/* Need to keep phy powered */
if (!bci->usb_enabled) {
pm_runtime_get_sync(bci->transceiver->dev);
bci->usb_enabled = 1;
}
if (bci->usb_mode == CHARGE_AUTO) {
/* Enable interrupts now. */
reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC |
TWL4030_TBATOR2 | TWL4030_TBATOR1 |
TWL4030_BATSTS);
ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
TWL4030_INTERRUPTS_BCIIMR1A);
if (ret < 0) {
dev_err(bci->dev,
"failed to unmask interrupts: %d\n",
ret);
return ret;
}
/* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */
ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB);
}
/* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */
ret = twl4030_clear_set(TWL_MODULE_MAIN_CHARGE, 0,
TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4);
if (bci->usb_mode == CHARGE_LINEAR) {
/* Enable interrupts now. */
reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_TBATOR2 |
TWL4030_TBATOR1 | TWL4030_BATSTS);
ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
TWL4030_INTERRUPTS_BCIIMR1A);
if (ret < 0) {
dev_err(bci->dev,
"failed to unmask interrupts: %d\n",
ret);
return ret;
}
twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC|TWL4030_CVENAC, 0);
/* Watch dog key: WOVF acknowledge */
ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x33,
TWL4030_BCIWDKEY);
/* 0x24 + EKEY6: off mode */
ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x2a,
TWL4030_BCIMDKEY);
/* EKEY2: Linear charge: USB path */
ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x26,
TWL4030_BCIMDKEY);
/* WDKEY5: stop watchdog count */
ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xf3,
TWL4030_BCIWDKEY);
/* enable MFEN3 access */
ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x9c,
TWL4030_BCIMFKEY);
/* ICHGEOCEN - end-of-charge monitor (current < 80mA)
* (charging continues)
* ICHGLOWEN - current level monitor (charge continues)
* don't monitor over-current or heat save
*/
ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xf0,
TWL4030_BCIMFEN3);
}
} else {
ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0);
ret |= twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x2a,
TWL4030_BCIMDKEY);
if (bci->usb_enabled) {
pm_runtime_mark_last_busy(bci->transceiver->dev);
pm_runtime_put_autosuspend(bci->transceiver->dev);
bci->usb_enabled = 0;
}
bci->usb_cur = 0;
}
return ret;
}
/*
* Enable/Disable AC Charge funtionality.
*/
static int twl4030_charger_enable_ac(struct twl4030_bci *bci, bool enable)
{
int ret;
if (bci->ac_mode == CHARGE_OFF)
enable = false;
if (enable)
ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC);
else
ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0);
return ret;
}
/*
* Enable/Disable charging of Backup Battery.
*/
static int twl4030_charger_enable_backup(int uvolt, int uamp)
{
int ret;
u8 flags;
if (uvolt < 2500000 ||
uamp < 25) {
/* disable charging of backup battery */
ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER,
TWL4030_BBCHEN, 0, TWL4030_BB_CFG);
return ret;
}
flags = TWL4030_BBCHEN;
if (uvolt >= 3200000)
flags |= TWL4030_BBSEL_3V2;
else if (uvolt >= 3100000)
flags |= TWL4030_BBSEL_3V1;
else if (uvolt >= 3000000)
flags |= TWL4030_BBSEL_3V0;
else
flags |= TWL4030_BBSEL_2V5;
if (uamp >= 1000)
flags |= TWL4030_BBISEL_1000uA;
else if (uamp >= 500)
flags |= TWL4030_BBISEL_500uA;
else if (uamp >= 150)
flags |= TWL4030_BBISEL_150uA;
else
flags |= TWL4030_BBISEL_25uA;
ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER,
TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK,
flags,
TWL4030_BB_CFG);
return ret;
}
/*
* TWL4030 CHG_PRES (AC charger presence) events
*/
static irqreturn_t twl4030_charger_interrupt(int irq, void *arg)
{
struct twl4030_bci *bci = arg;
dev_dbg(bci->dev, "CHG_PRES irq\n");
/* reset current on each 'plug' event */
bci->ac_cur = 500000;
twl4030_charger_update_current(bci);
power_supply_changed(bci->ac);
power_supply_changed(bci->usb);
return IRQ_HANDLED;
}
/*
* TWL4030 BCI monitoring events
*/
static irqreturn_t twl4030_bci_interrupt(int irq, void *arg)
{
struct twl4030_bci *bci = arg;
u8 irqs1, irqs2;
int ret;
ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1,
TWL4030_INTERRUPTS_BCIISR1A);
if (ret < 0)
return IRQ_HANDLED;
ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2,
TWL4030_INTERRUPTS_BCIISR2A);
if (ret < 0)
return IRQ_HANDLED;
dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1);
if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) {
/* charger state change, inform the core */
power_supply_changed(bci->ac);
power_supply_changed(bci->usb);
}
twl4030_charger_update_current(bci);
/* various monitoring events, for now we just log them here */
if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1))
dev_warn(bci->dev, "battery temperature out of range\n");
if (irqs1 & TWL4030_BATSTS)
dev_crit(bci->dev, "battery disconnected\n");
if (irqs2 & TWL4030_VBATOV)
dev_crit(bci->dev, "VBAT overvoltage\n");
if (irqs2 & TWL4030_VBUSOV)
dev_crit(bci->dev, "VBUS overvoltage\n");
if (irqs2 & TWL4030_ACCHGOV)
dev_crit(bci->dev, "Ac charger overvoltage\n");
return IRQ_HANDLED;
}
static void twl4030_bci_usb_work(struct work_struct *data)
{
struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work);
switch (bci->event) {
case USB_EVENT_VBUS:
case USB_EVENT_CHARGER:
twl4030_charger_enable_usb(bci, true);
break;
case USB_EVENT_NONE:
twl4030_charger_enable_usb(bci, false);
break;
}
}
static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val,
void *priv)
{
struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, usb_nb);
dev_dbg(bci->dev, "OTG notify %lu\n", val);
/* reset current on each 'plug' event */
if (allow_usb)
bci->usb_cur_target = 500000;
else
bci->usb_cur_target = 100000;
bci->event = val;
schedule_work(&bci->work);
return NOTIFY_OK;
}
/*
* sysfs charger enabled store
*/
static ssize_t
twl4030_bci_mode_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t n)
{
struct twl4030_bci *bci = dev_get_drvdata(dev->parent);
int mode;
int status;
mode = sysfs_match_string(modes, buf);
if (mode < 0)
return mode;
if (dev == &bci->ac->dev) {
if (mode == 2)
return -EINVAL;
twl4030_charger_enable_ac(bci, false);
bci->ac_mode = mode;
status = twl4030_charger_enable_ac(bci, true);
} else {
twl4030_charger_enable_usb(bci, false);
bci->usb_mode = mode;
status = twl4030_charger_enable_usb(bci, true);
}
return (status == 0) ? n : status;
}
/*
* sysfs charger enabled show
*/
static ssize_t
twl4030_bci_mode_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct twl4030_bci *bci = dev_get_drvdata(dev->parent);
int len = 0;
int i;
int mode = bci->usb_mode;
if (dev == &bci->ac->dev)
mode = bci->ac_mode;
for (i = 0; i < ARRAY_SIZE(modes); i++)
if (mode == i)
len += sysfs_emit_at(buf, len, "[%s] ", modes[i]);
else
len += sysfs_emit_at(buf, len, "%s ", modes[i]);
buf[len-1] = '\n';
return len;
}
static DEVICE_ATTR(mode, 0644, twl4030_bci_mode_show,
twl4030_bci_mode_store);
static int twl4030_charger_get_current(void)
{
int curr;
int ret;
u8 bcictl1;
curr = twl4030bci_read_adc_val(TWL4030_BCIICHG);
if (curr < 0)
return curr;
ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1);
if (ret)
return ret;
return regval2ua(curr, bcictl1 & TWL4030_CGAIN);
}
/*
* Returns the main charge FSM state
* Or < 0 on failure.
*/
static int twl4030bci_state(struct twl4030_bci *bci)
{
int ret;
u8 state;
ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state);
if (ret) {
dev_err(bci->dev, "error reading BCIMSTATEC\n");
return ret;
}
dev_dbg(bci->dev, "state: %02x\n", state);
return state;
}
static int twl4030_bci_state_to_status(int state)
{
state &= TWL4030_MSTATEC_MASK;
if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7)
return POWER_SUPPLY_STATUS_CHARGING;
else if (TWL4030_MSTATEC_COMPLETE1 <= state &&
state <= TWL4030_MSTATEC_COMPLETE4)
return POWER_SUPPLY_STATUS_FULL;
else
return POWER_SUPPLY_STATUS_NOT_CHARGING;
}
static int twl4030_bci_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct twl4030_bci *bci = dev_get_drvdata(psy->dev.parent);
int is_charging;
int state;
int ret;
state = twl4030bci_state(bci);
if (state < 0)
return state;
if (psy->desc->type == POWER_SUPPLY_TYPE_USB)
is_charging = state & TWL4030_MSTATEC_USB;
else
is_charging = state & TWL4030_MSTATEC_AC;
if (!is_charging) {
u8 s;
ret = twl4030_bci_read(TWL4030_BCIMDEN, &s);
if (ret < 0)
return ret;
if (psy->desc->type == POWER_SUPPLY_TYPE_USB)
is_charging = s & 1;
else
is_charging = s & 2;
if (is_charging)
/* A little white lie */
state = TWL4030_MSTATEC_QUICK1;
}
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
if (is_charging)
val->intval = twl4030_bci_state_to_status(state);
else
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
/* charging must be active for meaningful result */
if (!is_charging)
return -ENODATA;
if (psy->desc->type == POWER_SUPPLY_TYPE_USB) {
ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS);
if (ret < 0)
return ret;
/* BCIVBUS uses ADCIN8, 7/1023 V/step */
val->intval = ret * 6843;
} else {
ret = twl4030bci_read_adc_val(TWL4030_BCIVAC);
if (ret < 0)
return ret;
/* BCIVAC uses ADCIN11, 10/1023 V/step */
val->intval = ret * 9775;
}
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
if (!is_charging)
return -ENODATA;
/* current measurement is shared between AC and USB */
ret = twl4030_charger_get_current();
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = is_charging &&
twl4030_bci_state_to_status(state) !=
POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
val->intval = -1;
if (psy->desc->type != POWER_SUPPLY_TYPE_USB) {
if (!bci->ac_is_active)
val->intval = bci->ac_cur;
} else {
if (bci->ac_is_active)
val->intval = bci->usb_cur_target;
}
if (val->intval < 0) {
u8 bcictl1;
val->intval = twl4030bci_read_adc_val(TWL4030_BCIIREF1);
if (val->intval < 0)
return val->intval;
ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1);
if (ret < 0)
return ret;
val->intval = regval2ua(val->intval, bcictl1 &
TWL4030_CGAIN);
}
break;
default:
return -EINVAL;
}
return 0;
}
static int twl4030_bci_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct twl4030_bci *bci = dev_get_drvdata(psy->dev.parent);
switch (psp) {
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
if (psy->desc->type == POWER_SUPPLY_TYPE_USB)
bci->usb_cur_target = val->intval;
else
bci->ac_cur = val->intval;
twl4030_charger_update_current(bci);
break;
default:
return -EINVAL;
}
return 0;
}
static int twl4030_bci_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return true;
default:
return false;
}
}
static enum power_supply_property twl4030_charger_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
};
#ifdef CONFIG_OF
static const struct twl4030_bci_platform_data *
twl4030_bci_parse_dt(struct device *dev)
{
struct device_node *np = dev->of_node;
struct twl4030_bci_platform_data *pdata;
u32 num;
if (!np)
return NULL;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return pdata;
if (of_property_read_u32(np, "ti,bb-uvolt", &num) == 0)
pdata->bb_uvolt = num;
if (of_property_read_u32(np, "ti,bb-uamp", &num) == 0)
pdata->bb_uamp = num;
return pdata;
}
#else
static inline const struct twl4030_bci_platform_data *
twl4030_bci_parse_dt(struct device *dev)
{
return NULL;
}
#endif
static const struct power_supply_desc twl4030_bci_ac_desc = {
.name = "twl4030_ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = twl4030_charger_props,
.num_properties = ARRAY_SIZE(twl4030_charger_props),
.get_property = twl4030_bci_get_property,
.set_property = twl4030_bci_set_property,
.property_is_writeable = twl4030_bci_property_is_writeable,
};
static const struct power_supply_desc twl4030_bci_usb_desc = {
.name = "twl4030_usb",
.type = POWER_SUPPLY_TYPE_USB,
.properties = twl4030_charger_props,
.num_properties = ARRAY_SIZE(twl4030_charger_props),
.get_property = twl4030_bci_get_property,
.set_property = twl4030_bci_set_property,
.property_is_writeable = twl4030_bci_property_is_writeable,
};
static int twl4030_bci_probe(struct platform_device *pdev)
{
struct twl4030_bci *bci;
const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data;
int ret;
u32 reg;
bci = devm_kzalloc(&pdev->dev, sizeof(*bci), GFP_KERNEL);
if (bci == NULL)
return -ENOMEM;
if (!pdata)
pdata = twl4030_bci_parse_dt(&pdev->dev);
bci->ichg_eoc = 80100; /* Stop charging when current drops to here */
bci->ichg_lo = 241000; /* Low threshold */
bci->ichg_hi = 500000; /* High threshold */
bci->ac_cur = 500000; /* 500mA */
if (allow_usb)
bci->usb_cur_target = 500000; /* 500mA */
else
bci->usb_cur_target = 100000; /* 100mA */
bci->usb_mode = CHARGE_AUTO;
bci->ac_mode = CHARGE_AUTO;
bci->dev = &pdev->dev;
bci->irq_chg = platform_get_irq(pdev, 0);
bci->irq_bci = platform_get_irq(pdev, 1);
platform_set_drvdata(pdev, bci);
INIT_WORK(&bci->work, twl4030_bci_usb_work);
INIT_DELAYED_WORK(&bci->current_worker, twl4030_current_worker);
bci->channel_vac = devm_iio_channel_get(&pdev->dev, "vac");
if (IS_ERR(bci->channel_vac)) {
ret = PTR_ERR(bci->channel_vac);
if (ret == -EPROBE_DEFER)
return ret; /* iio not ready */
dev_warn(&pdev->dev, "could not request vac iio channel (%d)",
ret);
bci->channel_vac = NULL;
}
if (bci->dev->of_node) {
struct device_node *phynode;
phynode = of_get_compatible_child(bci->dev->of_node->parent,
"ti,twl4030-usb");
if (phynode) {
bci->usb_nb.notifier_call = twl4030_bci_usb_ncb;
bci->transceiver = devm_usb_get_phy_by_node(
bci->dev, phynode, &bci->usb_nb);
of_node_put(phynode);
if (IS_ERR(bci->transceiver)) {
ret = PTR_ERR(bci->transceiver);
if (ret == -EPROBE_DEFER)
return ret; /* phy not ready */
dev_warn(&pdev->dev, "could not request transceiver (%d)",
ret);
bci->transceiver = NULL;
}
}
}
bci->ac = devm_power_supply_register(&pdev->dev, &twl4030_bci_ac_desc,
NULL);
if (IS_ERR(bci->ac)) {
ret = PTR_ERR(bci->ac);
dev_err(&pdev->dev, "failed to register ac: %d\n", ret);
return ret;
}
bci->usb = devm_power_supply_register(&pdev->dev, &twl4030_bci_usb_desc,
NULL);
if (IS_ERR(bci->usb)) {
ret = PTR_ERR(bci->usb);
dev_err(&pdev->dev, "failed to register usb: %d\n", ret);
return ret;
}
ret = devm_request_threaded_irq(&pdev->dev, bci->irq_chg, NULL,
twl4030_charger_interrupt, IRQF_ONESHOT, pdev->name,
bci);
if (ret < 0) {
dev_err(&pdev->dev, "could not request irq %d, status %d\n",
bci->irq_chg, ret);
return ret;
}
ret = devm_request_threaded_irq(&pdev->dev, bci->irq_bci, NULL,
twl4030_bci_interrupt, IRQF_ONESHOT, pdev->name, bci);
if (ret < 0) {
dev_err(&pdev->dev, "could not request irq %d, status %d\n",
bci->irq_bci, ret);
return ret;
}
/* Enable interrupts now. */
reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 |
TWL4030_TBATOR1 | TWL4030_BATSTS);
ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
TWL4030_INTERRUPTS_BCIIMR1A);
if (ret < 0) {
dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
return ret;
}
reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV);
ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
TWL4030_INTERRUPTS_BCIIMR2A);
if (ret < 0)
dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
twl4030_charger_update_current(bci);
if (device_create_file(&bci->usb->dev, &dev_attr_mode))
dev_warn(&pdev->dev, "could not create sysfs file\n");
if (device_create_file(&bci->ac->dev, &dev_attr_mode))
dev_warn(&pdev->dev, "could not create sysfs file\n");
twl4030_charger_enable_ac(bci, true);
if (!IS_ERR_OR_NULL(bci->transceiver))
twl4030_bci_usb_ncb(&bci->usb_nb,
bci->transceiver->last_event,
NULL);
else
twl4030_charger_enable_usb(bci, false);
if (pdata)
twl4030_charger_enable_backup(pdata->bb_uvolt,
pdata->bb_uamp);
else
twl4030_charger_enable_backup(0, 0);
return 0;
}
static int twl4030_bci_remove(struct platform_device *pdev)
{
struct twl4030_bci *bci = platform_get_drvdata(pdev);
twl4030_charger_enable_ac(bci, false);
twl4030_charger_enable_usb(bci, false);
twl4030_charger_enable_backup(0, 0);
device_remove_file(&bci->usb->dev, &dev_attr_mode);
device_remove_file(&bci->ac->dev, &dev_attr_mode);
/* mask interrupts */
twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
TWL4030_INTERRUPTS_BCIIMR1A);
twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
TWL4030_INTERRUPTS_BCIIMR2A);
return 0;
}
static const struct of_device_id twl_bci_of_match[] __maybe_unused = {
{.compatible = "ti,twl4030-bci", },
{ }
};
MODULE_DEVICE_TABLE(of, twl_bci_of_match);
static struct platform_driver twl4030_bci_driver = {
.probe = twl4030_bci_probe,
.remove = twl4030_bci_remove,
.driver = {
.name = "twl4030_bci",
.of_match_table = of_match_ptr(twl_bci_of_match),
},
};
module_platform_driver(twl4030_bci_driver);
MODULE_AUTHOR("Gražvydas Ignotas");
MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:twl4030_bci");
| linux-master | drivers/power/supply/twl4030_charger.c |
// SPDX-License-Identifier: GPL-2.0+
/*
* AC driver for 7th-generation Microsoft Surface devices via Surface System
* Aggregator Module (SSAM).
*
* Copyright (C) 2019-2021 Maximilian Luz <[email protected]>
*/
#include <asm/unaligned.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/power_supply.h>
#include <linux/types.h>
#include <linux/surface_aggregator/device.h>
/* -- SAM interface. -------------------------------------------------------- */
enum sam_event_cid_bat {
SAM_EVENT_CID_BAT_ADP = 0x17,
};
enum sam_battery_sta {
SAM_BATTERY_STA_OK = 0x0f,
SAM_BATTERY_STA_PRESENT = 0x10,
};
/* Get battery status (_STA). */
SSAM_DEFINE_SYNC_REQUEST_CL_R(ssam_bat_get_sta, __le32, {
.target_category = SSAM_SSH_TC_BAT,
.command_id = 0x01,
});
/* Get platform power source for battery (_PSR / DPTF PSRC). */
SSAM_DEFINE_SYNC_REQUEST_CL_R(ssam_bat_get_psrc, __le32, {
.target_category = SSAM_SSH_TC_BAT,
.command_id = 0x0d,
});
/* -- Device structures. ---------------------------------------------------- */
struct spwr_psy_properties {
const char *name;
struct ssam_event_registry registry;
};
struct spwr_ac_device {
struct ssam_device *sdev;
char name[32];
struct power_supply *psy;
struct power_supply_desc psy_desc;
struct ssam_event_notifier notif;
struct mutex lock; /* Guards access to state below. */
__le32 state;
};
/* -- State management. ----------------------------------------------------- */
static int spwr_ac_update_unlocked(struct spwr_ac_device *ac)
{
__le32 old = ac->state;
int status;
lockdep_assert_held(&ac->lock);
status = ssam_retry(ssam_bat_get_psrc, ac->sdev, &ac->state);
if (status < 0)
return status;
return old != ac->state;
}
static int spwr_ac_update(struct spwr_ac_device *ac)
{
int status;
mutex_lock(&ac->lock);
status = spwr_ac_update_unlocked(ac);
mutex_unlock(&ac->lock);
return status;
}
static int spwr_ac_recheck(struct spwr_ac_device *ac)
{
int status;
status = spwr_ac_update(ac);
if (status > 0)
power_supply_changed(ac->psy);
return status >= 0 ? 0 : status;
}
static u32 spwr_notify_ac(struct ssam_event_notifier *nf, const struct ssam_event *event)
{
struct spwr_ac_device *ac;
int status;
ac = container_of(nf, struct spwr_ac_device, notif);
dev_dbg(&ac->sdev->dev, "power event (cid = %#04x, iid = %#04x, tid = %#04x)\n",
event->command_id, event->instance_id, event->target_id);
/*
* Allow events of all targets/instances here. Global adapter status
* seems to be handled via target=1 and instance=1, but events are
* reported on all targets/instances in use.
*
* While it should be enough to just listen on 1/1, listen everywhere to
* make sure we don't miss anything.
*/
switch (event->command_id) {
case SAM_EVENT_CID_BAT_ADP:
status = spwr_ac_recheck(ac);
return ssam_notifier_from_errno(status) | SSAM_NOTIF_HANDLED;
default:
return 0;
}
}
/* -- Properties. ----------------------------------------------------------- */
static const enum power_supply_property spwr_ac_props[] = {
POWER_SUPPLY_PROP_ONLINE,
};
static int spwr_ac_get_property(struct power_supply *psy, enum power_supply_property psp,
union power_supply_propval *val)
{
struct spwr_ac_device *ac = power_supply_get_drvdata(psy);
int status;
mutex_lock(&ac->lock);
status = spwr_ac_update_unlocked(ac);
if (status)
goto out;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = !!le32_to_cpu(ac->state);
break;
default:
status = -EINVAL;
goto out;
}
out:
mutex_unlock(&ac->lock);
return status;
}
/* -- Device setup. --------------------------------------------------------- */
static char *battery_supplied_to[] = {
"BAT1",
"BAT2",
};
static void spwr_ac_init(struct spwr_ac_device *ac, struct ssam_device *sdev,
struct ssam_event_registry registry, const char *name)
{
mutex_init(&ac->lock);
strncpy(ac->name, name, ARRAY_SIZE(ac->name) - 1);
ac->sdev = sdev;
ac->notif.base.priority = 1;
ac->notif.base.fn = spwr_notify_ac;
ac->notif.event.reg = registry;
ac->notif.event.id.target_category = sdev->uid.category;
ac->notif.event.id.instance = 0;
ac->notif.event.mask = SSAM_EVENT_MASK_NONE;
ac->notif.event.flags = SSAM_EVENT_SEQUENCED;
ac->psy_desc.name = ac->name;
ac->psy_desc.type = POWER_SUPPLY_TYPE_MAINS;
ac->psy_desc.properties = spwr_ac_props;
ac->psy_desc.num_properties = ARRAY_SIZE(spwr_ac_props);
ac->psy_desc.get_property = spwr_ac_get_property;
}
static int spwr_ac_register(struct spwr_ac_device *ac)
{
struct power_supply_config psy_cfg = {};
__le32 sta;
int status;
/* Make sure the device is there and functioning properly. */
status = ssam_retry(ssam_bat_get_sta, ac->sdev, &sta);
if (status)
return status;
if ((le32_to_cpu(sta) & SAM_BATTERY_STA_OK) != SAM_BATTERY_STA_OK)
return -ENODEV;
psy_cfg.drv_data = ac;
psy_cfg.supplied_to = battery_supplied_to;
psy_cfg.num_supplicants = ARRAY_SIZE(battery_supplied_to);
ac->psy = devm_power_supply_register(&ac->sdev->dev, &ac->psy_desc, &psy_cfg);
if (IS_ERR(ac->psy))
return PTR_ERR(ac->psy);
return ssam_device_notifier_register(ac->sdev, &ac->notif);
}
/* -- Driver setup. --------------------------------------------------------- */
static int __maybe_unused surface_ac_resume(struct device *dev)
{
return spwr_ac_recheck(dev_get_drvdata(dev));
}
static SIMPLE_DEV_PM_OPS(surface_ac_pm_ops, NULL, surface_ac_resume);
static int surface_ac_probe(struct ssam_device *sdev)
{
const struct spwr_psy_properties *p;
struct spwr_ac_device *ac;
p = ssam_device_get_match_data(sdev);
if (!p)
return -ENODEV;
ac = devm_kzalloc(&sdev->dev, sizeof(*ac), GFP_KERNEL);
if (!ac)
return -ENOMEM;
spwr_ac_init(ac, sdev, p->registry, p->name);
ssam_device_set_drvdata(sdev, ac);
return spwr_ac_register(ac);
}
static void surface_ac_remove(struct ssam_device *sdev)
{
struct spwr_ac_device *ac = ssam_device_get_drvdata(sdev);
ssam_device_notifier_unregister(sdev, &ac->notif);
}
static const struct spwr_psy_properties spwr_psy_props_adp1 = {
.name = "ADP1",
.registry = SSAM_EVENT_REGISTRY_SAM,
};
static const struct ssam_device_id surface_ac_match[] = {
{ SSAM_SDEV(BAT, SAM, 0x01, 0x01), (unsigned long)&spwr_psy_props_adp1 },
{ },
};
MODULE_DEVICE_TABLE(ssam, surface_ac_match);
static struct ssam_device_driver surface_ac_driver = {
.probe = surface_ac_probe,
.remove = surface_ac_remove,
.match_table = surface_ac_match,
.driver = {
.name = "surface_ac",
.pm = &surface_ac_pm_ops,
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
};
module_ssam_device_driver(surface_ac_driver);
MODULE_AUTHOR("Maximilian Luz <[email protected]>");
MODULE_DESCRIPTION("AC driver for Surface System Aggregator Module");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/surface_charger.c |
// SPDX-License-Identifier: GPL-2.0+
/*
* max77976_charger.c - Driver for the Maxim MAX77976 battery charger
*
* Copyright (C) 2021 Luca Ceresoli
* Author: Luca Ceresoli <[email protected]>
*/
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#define MAX77976_DRIVER_NAME "max77976-charger"
#define MAX77976_CHIP_ID 0x76
static const char *max77976_manufacturer = "Maxim Integrated";
static const char *max77976_model = "MAX77976";
/* --------------------------------------------------------------------------
* Register map
*/
#define MAX77976_REG_CHIP_ID 0x00
#define MAX77976_REG_CHIP_REVISION 0x01
#define MAX77976_REG_CHG_INT_OK 0x12
#define MAX77976_REG_CHG_DETAILS_01 0x14
#define MAX77976_REG_CHG_CNFG_00 0x16
#define MAX77976_REG_CHG_CNFG_02 0x18
#define MAX77976_REG_CHG_CNFG_06 0x1c
#define MAX77976_REG_CHG_CNFG_09 0x1f
/* CHG_DETAILS_01.CHG_DTLS values */
enum max77976_charging_state {
MAX77976_CHARGING_PREQUALIFICATION = 0x0,
MAX77976_CHARGING_FAST_CONST_CURRENT,
MAX77976_CHARGING_FAST_CONST_VOLTAGE,
MAX77976_CHARGING_TOP_OFF,
MAX77976_CHARGING_DONE,
MAX77976_CHARGING_RESERVED_05,
MAX77976_CHARGING_TIMER_FAULT,
MAX77976_CHARGING_SUSPENDED_QBATT_OFF,
MAX77976_CHARGING_OFF,
MAX77976_CHARGING_RESERVED_09,
MAX77976_CHARGING_THERMAL_SHUTDOWN,
MAX77976_CHARGING_WATCHDOG_EXPIRED,
MAX77976_CHARGING_SUSPENDED_JEITA,
MAX77976_CHARGING_SUSPENDED_THM_REMOVAL,
MAX77976_CHARGING_SUSPENDED_PIN,
MAX77976_CHARGING_RESERVED_0F,
};
/* CHG_DETAILS_01.BAT_DTLS values */
enum max77976_battery_state {
MAX77976_BATTERY_BATTERY_REMOVAL = 0x0,
MAX77976_BATTERY_PREQUALIFICATION,
MAX77976_BATTERY_TIMER_FAULT,
MAX77976_BATTERY_REGULAR_VOLTAGE,
MAX77976_BATTERY_LOW_VOLTAGE,
MAX77976_BATTERY_OVERVOLTAGE,
MAX77976_BATTERY_RESERVED,
MAX77976_BATTERY_BATTERY_ONLY, // No valid adapter is present
};
/* CHG_CNFG_00.MODE values */
enum max77976_mode {
MAX77976_MODE_CHARGER_BUCK = 0x5,
MAX77976_MODE_BOOST = 0x9,
};
/* CHG_CNFG_02.CHG_CC: charge current limit, 100..5500 mA, 50 mA steps */
#define MAX77976_CHG_CC_STEP 50000U
#define MAX77976_CHG_CC_MIN 100000U
#define MAX77976_CHG_CC_MAX 5500000U
/* CHG_CNFG_09.CHGIN_ILIM: input current limit, 100..3200 mA, 100 mA steps */
#define MAX77976_CHGIN_ILIM_STEP 100000U
#define MAX77976_CHGIN_ILIM_MIN 100000U
#define MAX77976_CHGIN_ILIM_MAX 3200000U
enum max77976_field_idx {
VERSION, REVISION, /* CHIP_REVISION */
CHGIN_OK, /* CHG_INT_OK */
BAT_DTLS, CHG_DTLS, /* CHG_DETAILS_01 */
MODE, /* CHG_CNFG_00 */
CHG_CC, /* CHG_CNFG_02 */
CHGPROT, /* CHG_CNFG_06 */
CHGIN_ILIM, /* CHG_CNFG_09 */
MAX77976_N_REGMAP_FIELDS
};
static const struct reg_field max77976_reg_field[MAX77976_N_REGMAP_FIELDS] = {
[VERSION] = REG_FIELD(MAX77976_REG_CHIP_REVISION, 4, 7),
[REVISION] = REG_FIELD(MAX77976_REG_CHIP_REVISION, 0, 3),
[CHGIN_OK] = REG_FIELD(MAX77976_REG_CHG_INT_OK, 6, 6),
[CHG_DTLS] = REG_FIELD(MAX77976_REG_CHG_DETAILS_01, 0, 3),
[BAT_DTLS] = REG_FIELD(MAX77976_REG_CHG_DETAILS_01, 4, 6),
[MODE] = REG_FIELD(MAX77976_REG_CHG_CNFG_00, 0, 3),
[CHG_CC] = REG_FIELD(MAX77976_REG_CHG_CNFG_02, 0, 6),
[CHGPROT] = REG_FIELD(MAX77976_REG_CHG_CNFG_06, 2, 3),
[CHGIN_ILIM] = REG_FIELD(MAX77976_REG_CHG_CNFG_09, 0, 5),
};
static const struct regmap_config max77976_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0x24,
};
/* --------------------------------------------------------------------------
* Data structures
*/
struct max77976 {
struct i2c_client *client;
struct regmap *regmap;
struct regmap_field *rfield[MAX77976_N_REGMAP_FIELDS];
};
/* --------------------------------------------------------------------------
* power_supply properties
*/
static int max77976_get_status(struct max77976 *chg, int *val)
{
unsigned int regval;
int err;
err = regmap_field_read(chg->rfield[CHG_DTLS], ®val);
if (err < 0)
return err;
switch (regval) {
case MAX77976_CHARGING_PREQUALIFICATION:
case MAX77976_CHARGING_FAST_CONST_CURRENT:
case MAX77976_CHARGING_FAST_CONST_VOLTAGE:
case MAX77976_CHARGING_TOP_OFF:
*val = POWER_SUPPLY_STATUS_CHARGING;
break;
case MAX77976_CHARGING_DONE:
*val = POWER_SUPPLY_STATUS_FULL;
break;
case MAX77976_CHARGING_TIMER_FAULT:
case MAX77976_CHARGING_SUSPENDED_QBATT_OFF:
case MAX77976_CHARGING_SUSPENDED_JEITA:
case MAX77976_CHARGING_SUSPENDED_THM_REMOVAL:
case MAX77976_CHARGING_SUSPENDED_PIN:
*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case MAX77976_CHARGING_OFF:
case MAX77976_CHARGING_THERMAL_SHUTDOWN:
case MAX77976_CHARGING_WATCHDOG_EXPIRED:
*val = POWER_SUPPLY_STATUS_DISCHARGING;
break;
default:
*val = POWER_SUPPLY_STATUS_UNKNOWN;
}
return 0;
}
static int max77976_get_charge_type(struct max77976 *chg, int *val)
{
unsigned int regval;
int err;
err = regmap_field_read(chg->rfield[CHG_DTLS], ®val);
if (err < 0)
return err;
switch (regval) {
case MAX77976_CHARGING_PREQUALIFICATION:
*val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
case MAX77976_CHARGING_FAST_CONST_CURRENT:
case MAX77976_CHARGING_FAST_CONST_VOLTAGE:
*val = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
case MAX77976_CHARGING_TOP_OFF:
*val = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
break;
case MAX77976_CHARGING_DONE:
case MAX77976_CHARGING_TIMER_FAULT:
case MAX77976_CHARGING_SUSPENDED_QBATT_OFF:
case MAX77976_CHARGING_OFF:
case MAX77976_CHARGING_THERMAL_SHUTDOWN:
case MAX77976_CHARGING_WATCHDOG_EXPIRED:
case MAX77976_CHARGING_SUSPENDED_JEITA:
case MAX77976_CHARGING_SUSPENDED_THM_REMOVAL:
case MAX77976_CHARGING_SUSPENDED_PIN:
*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
default:
*val = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
}
return 0;
}
static int max77976_get_health(struct max77976 *chg, int *val)
{
unsigned int regval;
int err;
err = regmap_field_read(chg->rfield[BAT_DTLS], ®val);
if (err < 0)
return err;
switch (regval) {
case MAX77976_BATTERY_BATTERY_REMOVAL:
*val = POWER_SUPPLY_HEALTH_NO_BATTERY;
break;
case MAX77976_BATTERY_LOW_VOLTAGE:
case MAX77976_BATTERY_REGULAR_VOLTAGE:
*val = POWER_SUPPLY_HEALTH_GOOD;
break;
case MAX77976_BATTERY_TIMER_FAULT:
*val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
break;
case MAX77976_BATTERY_OVERVOLTAGE:
*val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
break;
case MAX77976_BATTERY_PREQUALIFICATION:
case MAX77976_BATTERY_BATTERY_ONLY:
*val = POWER_SUPPLY_HEALTH_UNKNOWN;
break;
default:
*val = POWER_SUPPLY_HEALTH_UNKNOWN;
}
return 0;
}
static int max77976_get_online(struct max77976 *chg, int *val)
{
unsigned int regval;
int err;
err = regmap_field_read(chg->rfield[CHGIN_OK], ®val);
if (err < 0)
return err;
*val = (regval ? 1 : 0);
return 0;
}
static int max77976_get_integer(struct max77976 *chg, enum max77976_field_idx fidx,
unsigned int clamp_min, unsigned int clamp_max,
unsigned int mult, int *val)
{
unsigned int regval;
int err;
err = regmap_field_read(chg->rfield[fidx], ®val);
if (err < 0)
return err;
*val = clamp_val(regval * mult, clamp_min, clamp_max);
return 0;
}
static int max77976_set_integer(struct max77976 *chg, enum max77976_field_idx fidx,
unsigned int clamp_min, unsigned int clamp_max,
unsigned int div, int val)
{
unsigned int regval;
regval = clamp_val(val, clamp_min, clamp_max) / div;
return regmap_field_write(chg->rfield[fidx], regval);
}
static int max77976_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct max77976 *chg = power_supply_get_drvdata(psy);
int err = 0;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
err = max77976_get_status(chg, &val->intval);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
err = max77976_get_charge_type(chg, &val->intval);
break;
case POWER_SUPPLY_PROP_HEALTH:
err = max77976_get_health(chg, &val->intval);
break;
case POWER_SUPPLY_PROP_ONLINE:
err = max77976_get_online(chg, &val->intval);
break;
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
val->intval = MAX77976_CHG_CC_MAX;
break;
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
err = max77976_get_integer(chg, CHG_CC,
MAX77976_CHG_CC_MIN,
MAX77976_CHG_CC_MAX,
MAX77976_CHG_CC_STEP,
&val->intval);
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
err = max77976_get_integer(chg, CHGIN_ILIM,
MAX77976_CHGIN_ILIM_MIN,
MAX77976_CHGIN_ILIM_MAX,
MAX77976_CHGIN_ILIM_STEP,
&val->intval);
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = max77976_model;
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = max77976_manufacturer;
break;
default:
err = -EINVAL;
}
return err;
}
static int max77976_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct max77976 *chg = power_supply_get_drvdata(psy);
int err = 0;
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
err = max77976_set_integer(chg, CHG_CC,
MAX77976_CHG_CC_MIN,
MAX77976_CHG_CC_MAX,
MAX77976_CHG_CC_STEP,
val->intval);
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
err = max77976_set_integer(chg, CHGIN_ILIM,
MAX77976_CHGIN_ILIM_MIN,
MAX77976_CHGIN_ILIM_MAX,
MAX77976_CHGIN_ILIM_STEP,
val->intval);
break;
default:
err = -EINVAL;
}
return err;
};
static int max77976_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return true;
default:
return false;
}
}
static enum power_supply_property max77976_psy_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static const struct power_supply_desc max77976_psy_desc = {
.name = MAX77976_DRIVER_NAME,
.type = POWER_SUPPLY_TYPE_USB,
.properties = max77976_psy_props,
.num_properties = ARRAY_SIZE(max77976_psy_props),
.get_property = max77976_get_property,
.set_property = max77976_set_property,
.property_is_writeable = max77976_property_is_writeable,
};
/* --------------------------------------------------------------------------
* Entry point
*/
static int max77976_detect(struct max77976 *chg)
{
struct device *dev = &chg->client->dev;
unsigned int id, ver, rev;
int err;
err = regmap_read(chg->regmap, MAX77976_REG_CHIP_ID, &id);
if (err)
return dev_err_probe(dev, err, "cannot read chip ID\n");
if (id != MAX77976_CHIP_ID)
return dev_err_probe(dev, -ENXIO, "unknown model ID 0x%02x\n", id);
err = regmap_field_read(chg->rfield[VERSION], &ver);
if (!err)
err = regmap_field_read(chg->rfield[REVISION], &rev);
if (err)
return dev_err_probe(dev, -ENXIO, "cannot read version/revision\n");
dev_info(dev, "detected model MAX779%02x ver %u rev %u", id, ver, rev);
return 0;
}
static int max77976_configure(struct max77976 *chg)
{
struct device *dev = &chg->client->dev;
int err;
/* Magic value to unlock writing to some registers */
err = regmap_field_write(chg->rfield[CHGPROT], 0x3);
if (err)
goto err;
/*
* Mode 5 = Charger ON, OTG OFF, buck ON, boost OFF.
* Other modes are not implemented by this driver.
*/
err = regmap_field_write(chg->rfield[MODE], MAX77976_MODE_CHARGER_BUCK);
if (err)
goto err;
return 0;
err:
return dev_err_probe(dev, err, "error while configuring");
}
static int max77976_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct power_supply_config psy_cfg = {};
struct power_supply *psy;
struct max77976 *chg;
int err;
int i;
chg = devm_kzalloc(dev, sizeof(*chg), GFP_KERNEL);
if (!chg)
return -ENOMEM;
i2c_set_clientdata(client, chg);
psy_cfg.drv_data = chg;
chg->client = client;
chg->regmap = devm_regmap_init_i2c(client, &max77976_regmap_config);
if (IS_ERR(chg->regmap))
return dev_err_probe(dev, PTR_ERR(chg->regmap),
"cannot allocate regmap\n");
for (i = 0; i < MAX77976_N_REGMAP_FIELDS; i++) {
chg->rfield[i] = devm_regmap_field_alloc(dev, chg->regmap,
max77976_reg_field[i]);
if (IS_ERR(chg->rfield[i]))
return dev_err_probe(dev, PTR_ERR(chg->rfield[i]),
"cannot allocate regmap field\n");
}
err = max77976_detect(chg);
if (err)
return err;
err = max77976_configure(chg);
if (err)
return err;
psy = devm_power_supply_register_no_ws(dev, &max77976_psy_desc, &psy_cfg);
if (IS_ERR(psy))
return dev_err_probe(dev, PTR_ERR(psy), "cannot register\n");
return 0;
}
static const struct i2c_device_id max77976_i2c_id[] = {
{ MAX77976_DRIVER_NAME, 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, max77976_i2c_id);
static const struct of_device_id max77976_of_id[] = {
{ .compatible = "maxim,max77976" },
{ },
};
MODULE_DEVICE_TABLE(of, max77976_of_id);
static struct i2c_driver max77976_driver = {
.driver = {
.name = MAX77976_DRIVER_NAME,
.of_match_table = max77976_of_id,
},
.probe = max77976_probe,
.id_table = max77976_i2c_id,
};
module_i2c_driver(max77976_driver);
MODULE_AUTHOR("Luca Ceresoli <[email protected]>");
MODULE_DESCRIPTION("Maxim MAX77976 charger driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/power/supply/max77976_charger.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2022 Richtek Technology Corp.
*
* Authors: Alina Yu <[email protected]>
* ChiYuan Huang <[email protected]>
*/
#include <linux/bits.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/kstrtox.h>
#include <linux/linear_range.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/sysfs.h>
#define RT9471_REG_OTGCFG 0x00
#define RT9471_REG_TOP 0x01
#define RT9471_REG_FUNC 0x02
#define RT9471_REG_IBUS 0x03
#define RT9471_REG_VBUS 0x04
#define RT9471_REG_PRECHG 0x05
#define RT9471_REG_VCHG 0x07
#define RT9471_REG_ICHG 0x08
#define RT9471_REG_CHGTMR 0x09
#define RT9471_REG_EOC 0x0A
#define RT9471_REG_INFO 0x0B
#define RT9471_REG_JEITA 0x0C
#define RT9471_REG_PUMP_EXP 0x0D
#define RT9471_REG_DPDMDET 0x0E
#define RT9471_REG_ICSTAT 0x0F
#define RT9471_REG_STAT0 0x10
#define RT9471_REG_STAT1 0x11
#define RT9471_REG_STAT2 0x12
#define RT9471_REG_IRQ0 0x20
#define RT9471_REG_MASK0 0x30
#define RT9471_OTGCV_MASK GENMASK(7, 6)
#define RT9471_OTGCC_MASK BIT(0)
#define RT9471_OTGEN_MASK BIT(1)
#define RT9471_CHGFAULT_MASK GENMASK(4, 1)
#define RT9471_NUM_IRQ_REGS 4
#define RT9471_OTGCV_MINUV 4850000
#define RT9471_OTGCV_STEPUV 150000
#define RT9471_NUM_VOTG 4
#define RT9471_VCHG_MAXUV 4700000
#define RT9471_ICHG_MAXUA 3150000
/* Device ID */
#define RT9470_DEVID 0x09
#define RT9470D_DEVID 0x0A
#define RT9471_DEVID 0x0D
#define RT9471D_DEVID 0x0E
/* IRQ number */
#define RT9471_IRQ_BC12_DONE 0
#define RT9471_IRQ_DETACH 1
#define RT9471_IRQ_RECHG 2
#define RT9471_IRQ_CHG_DONE 3
#define RT9471_IRQ_BG_CHG 4
#define RT9471_IRQ_IE0C 5
#define RT9471_IRQ_CHG_RDY 6
#define RT9471_IRQ_VBUS_GD 7
#define RT9471_IRQ_CHG_BATOV 9
#define RT9471_IRQ_CHG_SYSOV 10
#define RT9471_IRQ_CHG_TOUT 11
#define RT9471_IRQ_CHG_BUSUV 12
#define RT9471_IRQ_CHG_THREG 13
#define RT9471_IRQ_CHG_AICR 14
#define RT9471_IRQ_CHG_MIVR 15
#define RT9471_IRQ_SYS_SHORT 16
#define RT9471_IRQ_SYS_MIN 17
#define RT9471_IRQ_AICC_DONE 18
#define RT9471_IRQ_PE_DONE 19
#define RT9471_IRQ_JEITA_COLD 20
#define RT9471_IRQ_JEITA_COOL 21
#define RT9471_IRQ_JEITA_WARM 22
#define RT9471_IRQ_JEITA_HOT 23
#define RT9471_IRQ_OTG_FAULT 24
#define RT9471_IRQ_OTG_LBP 25
#define RT9471_IRQ_OTG_CC 26
#define RT9471_IRQ_WDT 29
#define RT9471_IRQ_VAC_OV 30
#define RT9471_IRQ_OTP 31
enum rt9471_fields {
F_WDT = 0,
F_WDT_RST,
F_CHG_EN,
F_HZ,
F_BATFET_DIS,
F_AICR,
F_AICC_EN,
F_MIVR,
F_IPRE_CHG,
F_VPRE_CHG,
F_VBAT_REG,
F_ICHG_REG,
F_EOC_RST,
F_TE,
F_IEOC_CHG,
F_DEVICE_ID,
F_REG_RST,
F_BC12_EN,
F_IC_STAT,
F_PORT_STAT,
F_ST_CHG_DONE,
F_ST_CHG_RDY,
F_ST_VBUS_GD,
F_MAX_FIELDS
};
enum rt9471_ranges {
RT9471_RANGE_AICR = 0,
RT9471_RANGE_MIVR,
RT9471_RANGE_IPRE,
RT9471_RANGE_VCHG,
RT9471_RANGE_ICHG,
RT9471_RANGE_IEOC,
RT9471_MAX_RANGES
};
enum {
RT9471_PORTSTAT_APPLE_10W = 8,
RT9471_PORTSTAT_SAMSUNG_10W,
RT9471_PORTSTAT_APPLE_5W,
RT9471_PORTSTAT_APPLE_12W,
RT9471_PORTSTAT_NSTD,
RT9471_PORTSTAT_SDP,
RT9471_PORTSTAT_CDP,
RT9471_PORTSTAT_DCP,
};
struct rt9471_chip {
struct device *dev;
struct regmap *regmap;
struct regmap_field *rm_fields[F_MAX_FIELDS];
struct regmap_irq_chip_data *irq_chip_data;
struct regulator_dev *otg_rdev;
struct power_supply *psy;
struct power_supply_desc psy_desc;
struct mutex var_lock;
enum power_supply_usb_type psy_usb_type;
int psy_usb_curr;
};
static const struct reg_field rt9471_reg_fields[F_MAX_FIELDS] = {
[F_WDT] = REG_FIELD(RT9471_REG_TOP, 0, 0),
[F_WDT_RST] = REG_FIELD(RT9471_REG_TOP, 1, 1),
[F_CHG_EN] = REG_FIELD(RT9471_REG_FUNC, 0, 0),
[F_HZ] = REG_FIELD(RT9471_REG_FUNC, 5, 5),
[F_BATFET_DIS] = REG_FIELD(RT9471_REG_FUNC, 7, 7),
[F_AICR] = REG_FIELD(RT9471_REG_IBUS, 0, 5),
[F_AICC_EN] = REG_FIELD(RT9471_REG_IBUS, 7, 7),
[F_MIVR] = REG_FIELD(RT9471_REG_VBUS, 0, 3),
[F_IPRE_CHG] = REG_FIELD(RT9471_REG_PRECHG, 0, 3),
[F_VPRE_CHG] = REG_FIELD(RT9471_REG_PRECHG, 4, 6),
[F_VBAT_REG] = REG_FIELD(RT9471_REG_VCHG, 0, 6),
[F_ICHG_REG] = REG_FIELD(RT9471_REG_ICHG, 0, 5),
[F_EOC_RST] = REG_FIELD(RT9471_REG_EOC, 0, 0),
[F_TE] = REG_FIELD(RT9471_REG_EOC, 1, 1),
[F_IEOC_CHG] = REG_FIELD(RT9471_REG_EOC, 4, 7),
[F_DEVICE_ID] = REG_FIELD(RT9471_REG_INFO, 3, 6),
[F_REG_RST] = REG_FIELD(RT9471_REG_INFO, 7, 7),
[F_BC12_EN] = REG_FIELD(RT9471_REG_DPDMDET, 7, 7),
[F_IC_STAT] = REG_FIELD(RT9471_REG_ICSTAT, 0, 3),
[F_PORT_STAT] = REG_FIELD(RT9471_REG_ICSTAT, 4, 7),
[F_ST_CHG_DONE] = REG_FIELD(RT9471_REG_STAT0, 3, 3),
[F_ST_CHG_RDY] = REG_FIELD(RT9471_REG_STAT0, 6, 6),
[F_ST_VBUS_GD] = REG_FIELD(RT9471_REG_STAT0, 7, 7),
};
static const struct linear_range rt9471_chg_ranges[RT9471_MAX_RANGES] = {
[RT9471_RANGE_AICR] = { .min = 50000, .min_sel = 1, .max_sel = 63, .step = 50000 },
[RT9471_RANGE_MIVR] = { .min = 3900000, .min_sel = 0, .max_sel = 15, .step = 100000 },
[RT9471_RANGE_IPRE] = { .min = 50000, .min_sel = 0, .max_sel = 15, .step = 50000 },
[RT9471_RANGE_VCHG] = { .min = 3900000, .min_sel = 0, .max_sel = 80, .step = 10000 },
[RT9471_RANGE_ICHG] = { .min = 0, .min_sel = 0, .max_sel = 63, .step = 50000 },
[RT9471_RANGE_IEOC] = { .min = 50000, .min_sel = 0, .max_sel = 15, .step = 50000 },
};
static int rt9471_set_value_by_field_range(struct rt9471_chip *chip,
enum rt9471_fields field,
enum rt9471_ranges range, int val)
{
unsigned int sel;
if (val < 0)
return -EINVAL;
linear_range_get_selector_within(rt9471_chg_ranges + range, val, &sel);
return regmap_field_write(chip->rm_fields[field], sel);
}
static int rt9471_get_value_by_field_range(struct rt9471_chip *chip,
enum rt9471_fields field,
enum rt9471_ranges range, int *val)
{
unsigned int sel, rvalue;
int ret;
ret = regmap_field_read(chip->rm_fields[field], &sel);
if (ret)
return ret;
ret = linear_range_get_value(rt9471_chg_ranges + range, sel, &rvalue);
if (ret)
return ret;
*val = rvalue;
return 0;
}
static int rt9471_set_ieoc(struct rt9471_chip *chip, int microamp)
{
int ret;
if (microamp == 0)
return regmap_field_write(chip->rm_fields[F_TE], 0);
ret = rt9471_set_value_by_field_range(chip, F_IEOC_CHG, RT9471_RANGE_IEOC, microamp);
if (ret)
return ret;
/* After applying the new IEOC value, enable charge termination */
return regmap_field_write(chip->rm_fields[F_TE], 1);
}
static int rt9471_get_ieoc(struct rt9471_chip *chip, int *microamp)
{
unsigned int chg_term_enable;
int ret;
ret = regmap_field_read(chip->rm_fields[F_TE], &chg_term_enable);
if (ret)
return ret;
if (!chg_term_enable) {
*microamp = 0;
return 0;
}
return rt9471_get_value_by_field_range(chip, F_IEOC_CHG, RT9471_RANGE_IEOC, microamp);
}
static int rt9471_get_status(struct rt9471_chip *chip, int *status)
{
unsigned int chg_ready, chg_done, fault_stat;
int ret;
ret = regmap_field_read(chip->rm_fields[F_ST_CHG_RDY], &chg_ready);
if (ret)
return ret;
ret = regmap_field_read(chip->rm_fields[F_ST_CHG_DONE], &chg_done);
if (ret)
return ret;
ret = regmap_read(chip->regmap, RT9471_REG_STAT1, &fault_stat);
if (ret)
return ret;
fault_stat &= RT9471_CHGFAULT_MASK;
if (chg_ready && chg_done)
*status = POWER_SUPPLY_STATUS_FULL;
else if (chg_ready && fault_stat)
*status = POWER_SUPPLY_STATUS_NOT_CHARGING;
else if (chg_ready && !fault_stat)
*status = POWER_SUPPLY_STATUS_CHARGING;
else
*status = POWER_SUPPLY_STATUS_DISCHARGING;
return 0;
}
static int rt9471_get_vbus_good(struct rt9471_chip *chip, int *stat)
{
unsigned int vbus_gd;
int ret;
ret = regmap_field_read(chip->rm_fields[F_ST_VBUS_GD], &vbus_gd);
if (ret)
return ret;
*stat = vbus_gd;
return 0;
}
static int rt9471_get_usb_type(struct rt9471_chip *chip, int *usb_type)
{
mutex_lock(&chip->var_lock);
*usb_type = chip->psy_usb_type;
mutex_unlock(&chip->var_lock);
return 0;
}
static int rt9471_get_usb_type_current(struct rt9471_chip *chip,
int *microamp)
{
mutex_lock(&chip->var_lock);
*microamp = chip->psy_usb_curr;
mutex_unlock(&chip->var_lock);
return 0;
}
static enum power_supply_property rt9471_charger_properties[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
POWER_SUPPLY_PROP_USB_TYPE,
POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_usb_type rt9471_charger_usb_types[] = {
POWER_SUPPLY_USB_TYPE_UNKNOWN,
POWER_SUPPLY_USB_TYPE_SDP,
POWER_SUPPLY_USB_TYPE_DCP,
POWER_SUPPLY_USB_TYPE_CDP,
POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID,
};
static int rt9471_charger_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
case POWER_SUPPLY_PROP_ONLINE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return 1;
default:
return 0;
}
}
static int rt9471_charger_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct rt9471_chip *chip = power_supply_get_drvdata(psy);
int value = val->intval;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
return regmap_field_write(chip->rm_fields[F_CHG_EN], !!value);
case POWER_SUPPLY_PROP_ONLINE:
return regmap_field_write(chip->rm_fields[F_HZ], !value);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
return rt9471_set_value_by_field_range(chip, F_ICHG_REG, RT9471_RANGE_ICHG, value);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
return rt9471_set_value_by_field_range(chip, F_VBAT_REG, RT9471_RANGE_VCHG, value);
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return rt9471_set_value_by_field_range(chip, F_AICR, RT9471_RANGE_AICR, value);
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
return rt9471_set_value_by_field_range(chip, F_MIVR, RT9471_RANGE_MIVR, value);
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
return rt9471_set_value_by_field_range(chip, F_IPRE_CHG, RT9471_RANGE_IPRE, value);
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return rt9471_set_ieoc(chip, val->intval);
default:
return -EINVAL;
}
}
static const char * const rt9471_manufacturer = "Richtek Technology Corp.";
static const char * const rt9471_model = "RT9471";
static int rt9471_charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct rt9471_chip *chip = power_supply_get_drvdata(psy);
int *pvalue = &val->intval;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
return rt9471_get_status(chip, pvalue);
case POWER_SUPPLY_PROP_ONLINE:
return rt9471_get_vbus_good(chip, pvalue);
case POWER_SUPPLY_PROP_CURRENT_MAX:
return rt9471_get_usb_type_current(chip, pvalue);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
return rt9471_get_value_by_field_range(chip, F_ICHG_REG, RT9471_RANGE_ICHG, pvalue);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
*pvalue = RT9471_ICHG_MAXUA;
return 0;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
return rt9471_get_value_by_field_range(chip, F_VBAT_REG, RT9471_RANGE_VCHG, pvalue);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
val->intval = RT9471_VCHG_MAXUV;
return 0;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return rt9471_get_value_by_field_range(chip, F_AICR, RT9471_RANGE_AICR, pvalue);
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
return rt9471_get_value_by_field_range(chip, F_MIVR, RT9471_RANGE_MIVR, pvalue);
case POWER_SUPPLY_PROP_USB_TYPE:
return rt9471_get_usb_type(chip, pvalue);
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
return rt9471_get_value_by_field_range(chip, F_IPRE_CHG, RT9471_RANGE_IPRE, pvalue);
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return rt9471_get_ieoc(chip, pvalue);
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = rt9471_model;
return 0;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = rt9471_manufacturer;
return 0;
default:
return -ENODATA;
}
}
static irqreturn_t rt9471_vbus_gd_handler(int irqno, void *devid)
{
struct rt9471_chip *chip = devid;
power_supply_changed(chip->psy);
return IRQ_HANDLED;
}
static irqreturn_t rt9471_detach_handler(int irqno, void *devid)
{
struct rt9471_chip *chip = devid;
unsigned int vbus_gd;
int ret;
ret = regmap_field_read(chip->rm_fields[F_ST_VBUS_GD], &vbus_gd);
if (ret)
return IRQ_NONE;
/* Only focus on really detached */
if (vbus_gd)
return IRQ_HANDLED;
mutex_lock(&chip->var_lock);
chip->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
chip->psy_usb_curr = 0;
mutex_unlock(&chip->var_lock);
power_supply_changed(chip->psy);
return IRQ_HANDLED;
}
static irqreturn_t rt9471_bc12_done_handler(int irqno, void *devid)
{
struct rt9471_chip *chip = devid;
enum power_supply_usb_type usb_type;
unsigned int port_stat;
int usb_curr, ret;
ret = regmap_field_read(chip->rm_fields[F_PORT_STAT], &port_stat);
if (ret)
return IRQ_NONE;
switch (port_stat) {
case RT9471_PORTSTAT_APPLE_10W:
usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;
usb_curr = 2000000;
break;
case RT9471_PORTSTAT_APPLE_5W:
usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;
usb_curr = 1000000;
break;
case RT9471_PORTSTAT_APPLE_12W:
usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;
usb_curr = 2400000;
break;
case RT9471_PORTSTAT_SAMSUNG_10W:
usb_type = POWER_SUPPLY_USB_TYPE_DCP;
usb_curr = 2000000;
break;
case RT9471_PORTSTAT_DCP:
usb_type = POWER_SUPPLY_USB_TYPE_DCP;
usb_curr = 1500000;
break;
case RT9471_PORTSTAT_NSTD:
case RT9471_PORTSTAT_SDP:
usb_type = POWER_SUPPLY_USB_TYPE_SDP;
usb_curr = 500000;
break;
case RT9471_PORTSTAT_CDP:
usb_type = POWER_SUPPLY_USB_TYPE_CDP;
usb_curr = 1500000;
break;
default:
usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
usb_curr = 0;
break;
}
mutex_lock(&chip->var_lock);
chip->psy_usb_type = usb_type;
chip->psy_usb_curr = usb_curr;
mutex_unlock(&chip->var_lock);
power_supply_changed(chip->psy);
return IRQ_HANDLED;
}
static irqreturn_t rt9471_wdt_handler(int irqno, void *devid)
{
struct rt9471_chip *chip = devid;
int ret;
ret = regmap_field_write(chip->rm_fields[F_WDT_RST], 1);
return ret ? IRQ_NONE : IRQ_HANDLED;
}
static irqreturn_t rt9471_otg_fault_handler(int irqno, void *devid)
{
struct rt9471_chip *chip = devid;
regulator_notifier_call_chain(chip->otg_rdev, REGULATOR_EVENT_FAIL, NULL);
return IRQ_HANDLED;
}
#define RT9471_IRQ_DESC(_name, _hwirq) \
{ \
.name = #_name, \
.hwirq = _hwirq, \
.handler = rt9471_##_name##_handler, \
}
static int rt9471_register_interrupts(struct rt9471_chip *chip)
{
struct device *dev = chip->dev;
static const struct {
char *name;
int hwirq;
irq_handler_t handler;
} chg_irqs[] = {
RT9471_IRQ_DESC(vbus_gd, RT9471_IRQ_VBUS_GD),
RT9471_IRQ_DESC(detach, RT9471_IRQ_DETACH),
RT9471_IRQ_DESC(bc12_done, RT9471_IRQ_BC12_DONE),
RT9471_IRQ_DESC(wdt, RT9471_IRQ_WDT),
RT9471_IRQ_DESC(otg_fault, RT9471_IRQ_OTG_FAULT),
}, *curr;
int i, virq, ret;
for (i = 0; i < ARRAY_SIZE(chg_irqs); i++) {
curr = chg_irqs + i;
virq = regmap_irq_get_virq(chip->irq_chip_data, curr->hwirq);
if (virq <= 0)
return virq;
ret = devm_request_threaded_irq(dev, virq, NULL, curr->handler,
IRQF_ONESHOT, curr->name, chip);
if (ret)
return dev_err_probe(dev, ret, "Failed to register IRQ (%s)\n",
curr->name);
}
return 0;
}
static const struct regulator_ops rt9471_otg_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
.get_current_limit = regulator_get_current_limit_regmap,
};
static const unsigned int rt9471_otg_microamp[] = { 500000, 1200000, };
static const struct regulator_desc rt9471_otg_rdesc = {
.of_match = of_match_ptr("usb-otg-vbus-regulator"),
.name = "rt9471-otg-vbus",
.owner = THIS_MODULE,
.type = REGULATOR_VOLTAGE,
.ops = &rt9471_otg_ops,
.min_uV = RT9471_OTGCV_MINUV,
.uV_step = RT9471_OTGCV_STEPUV,
.n_voltages = RT9471_NUM_VOTG,
.curr_table = rt9471_otg_microamp,
.n_current_limits = ARRAY_SIZE(rt9471_otg_microamp),
.enable_mask = RT9471_OTGEN_MASK,
.enable_reg = RT9471_REG_FUNC,
.vsel_reg = RT9471_REG_OTGCFG,
.vsel_mask = RT9471_OTGCV_MASK,
.csel_reg = RT9471_REG_OTGCFG,
.csel_mask = RT9471_OTGCC_MASK,
};
static int rt9471_register_otg_regulator(struct rt9471_chip *chip)
{
struct device *dev = chip->dev;
struct regulator_config cfg = { .dev = dev, .driver_data = chip };
chip->otg_rdev = devm_regulator_register(dev, &rt9471_otg_rdesc, &cfg);
return PTR_ERR_OR_ZERO(chip->otg_rdev);
}
static inline struct rt9471_chip *psy_device_to_chip(struct device *dev)
{
return power_supply_get_drvdata(to_power_supply(dev));
}
static ssize_t sysoff_enable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct rt9471_chip *chip = psy_device_to_chip(dev);
unsigned int sysoff_enable;
int ret;
ret = regmap_field_read(chip->rm_fields[F_BATFET_DIS], &sysoff_enable);
if (ret)
return ret;
return sysfs_emit(buf, "%d\n", sysoff_enable);
}
static ssize_t sysoff_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct rt9471_chip *chip = psy_device_to_chip(dev);
unsigned int tmp;
int ret;
ret = kstrtouint(buf, 10, &tmp);
if (ret)
return ret;
ret = regmap_field_write(chip->rm_fields[F_BATFET_DIS], !!tmp);
if (ret)
return ret;
return count;
}
static ssize_t port_detect_enable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct rt9471_chip *chip = psy_device_to_chip(dev);
unsigned int bc12_enable;
int ret;
ret = regmap_field_read(chip->rm_fields[F_BC12_EN], &bc12_enable);
if (ret)
return ret;
return sysfs_emit(buf, "%d\n", bc12_enable);
}
static ssize_t port_detect_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct rt9471_chip *chip = psy_device_to_chip(dev);
unsigned int tmp;
int ret;
ret = kstrtouint(buf, 10, &tmp);
if (ret)
return ret;
ret = regmap_field_write(chip->rm_fields[F_BC12_EN], !!tmp);
if (ret)
return ret;
return count;
}
static DEVICE_ATTR_RW(sysoff_enable);
static DEVICE_ATTR_RW(port_detect_enable);
static struct attribute *rt9471_sysfs_attrs[] = {
&dev_attr_sysoff_enable.attr,
&dev_attr_port_detect_enable.attr,
NULL
};
ATTRIBUTE_GROUPS(rt9471_sysfs);
static int rt9471_register_psy(struct rt9471_chip *chip)
{
struct device *dev = chip->dev;
struct power_supply_desc *desc = &chip->psy_desc;
struct power_supply_config cfg = {};
char *psy_name;
cfg.drv_data = chip;
cfg.of_node = dev->of_node;
cfg.attr_grp = rt9471_sysfs_groups;
psy_name = devm_kasprintf(dev, GFP_KERNEL, "rt9471-%s", dev_name(dev));
if (!psy_name)
return -ENOMEM;
desc->name = psy_name;
desc->type = POWER_SUPPLY_TYPE_USB;
desc->usb_types = rt9471_charger_usb_types;
desc->num_usb_types = ARRAY_SIZE(rt9471_charger_usb_types);
desc->properties = rt9471_charger_properties;
desc->num_properties = ARRAY_SIZE(rt9471_charger_properties);
desc->get_property = rt9471_charger_get_property;
desc->set_property = rt9471_charger_set_property;
desc->property_is_writeable = rt9471_charger_property_is_writeable;
chip->psy = devm_power_supply_register(dev, desc, &cfg);
return PTR_ERR_OR_ZERO(chip->psy);
}
static const struct regmap_irq rt9471_regmap_irqs[] = {
REGMAP_IRQ_REG_LINE(RT9471_IRQ_BC12_DONE, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_DETACH, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_RECHG, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_DONE, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_BG_CHG, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_IE0C, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_RDY, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_VBUS_GD, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_BATOV, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_SYSOV, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_TOUT, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_BUSUV, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_THREG, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_AICR, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_MIVR, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_SYS_SHORT, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_SYS_MIN, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_AICC_DONE, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_PE_DONE, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_COLD, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_COOL, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_WARM, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_HOT, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_FAULT, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_LBP, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_CC, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_WDT, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_VAC_OV, 8),
REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTP, 8),
};
static const struct regmap_irq_chip rt9471_irq_chip = {
.name = "rt9471-irqs",
.status_base = RT9471_REG_IRQ0,
.mask_base = RT9471_REG_MASK0,
.num_regs = RT9471_NUM_IRQ_REGS,
.irqs = rt9471_regmap_irqs,
.num_irqs = ARRAY_SIZE(rt9471_regmap_irqs),
};
static const struct reg_sequence rt9471_init_regs[] = {
REG_SEQ0(RT9471_REG_INFO, 0x80), /* REG_RST */
REG_SEQ0(RT9471_REG_TOP, 0xC0), /* WDT = 0 */
REG_SEQ0(RT9471_REG_FUNC, 0x01), /* BATFET_DIS_DLY = 0 */
REG_SEQ0(RT9471_REG_IBUS, 0x0A), /* AUTO_AICR = 0 */
REG_SEQ0(RT9471_REG_VBUS, 0xC6), /* VAC_OVP = 14V */
REG_SEQ0(RT9471_REG_JEITA, 0x38), /* JEITA = 0 */
REG_SEQ0(RT9471_REG_DPDMDET, 0x31), /* BC12_EN = 0, DCP_DP_OPT = 1 */
};
static int rt9471_check_devinfo(struct rt9471_chip *chip)
{
struct device *dev = chip->dev;
unsigned int dev_id;
int ret;
ret = regmap_field_read(chip->rm_fields[F_DEVICE_ID], &dev_id);
if (ret)
return dev_err_probe(dev, ret, "Failed to read device_id\n");
switch (dev_id) {
case RT9470_DEVID:
case RT9470D_DEVID:
case RT9471_DEVID:
case RT9471D_DEVID:
return 0;
default:
return dev_err_probe(dev, -ENODEV, "Incorrect device id\n");
}
}
static bool rt9471_accessible_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case 0x00 ... 0x0F:
case 0x10 ... 0x13:
case 0x20 ... 0x33:
case 0x40 ... 0xA1:
return true;
default:
return false;
}
}
static const struct regmap_config rt9471_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xA1,
.writeable_reg = rt9471_accessible_reg,
.readable_reg = rt9471_accessible_reg,
};
static int rt9471_probe(struct i2c_client *i2c)
{
struct device *dev = &i2c->dev;
struct rt9471_chip *chip;
struct gpio_desc *ce_gpio;
struct regmap *regmap;
int ret;
chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->dev = dev;
mutex_init(&chip->var_lock);
i2c_set_clientdata(i2c, chip);
/* Default pull charge enable gpio to make 'CHG_EN' by SW control only */
ce_gpio = devm_gpiod_get_optional(dev, "charge-enable", GPIOD_OUT_HIGH);
if (IS_ERR(ce_gpio))
return dev_err_probe(dev, PTR_ERR(ce_gpio),
"Failed to config charge enable gpio\n");
regmap = devm_regmap_init_i2c(i2c, &rt9471_regmap_config);
if (IS_ERR(regmap))
return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n");
chip->regmap = regmap;
ret = devm_regmap_field_bulk_alloc(dev, regmap, chip->rm_fields,
rt9471_reg_fields,
ARRAY_SIZE(rt9471_reg_fields));
if (ret)
return dev_err_probe(dev, ret, "Failed to alloc regmap field\n");
ret = rt9471_check_devinfo(chip);
if (ret)
return ret;
ret = regmap_register_patch(regmap, rt9471_init_regs,
ARRAY_SIZE(rt9471_init_regs));
if (ret)
return dev_err_probe(dev, ret, "Failed to init registers\n");
ret = devm_regmap_add_irq_chip(dev, regmap, i2c->irq,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 0,
&rt9471_irq_chip, &chip->irq_chip_data);
if (ret)
return dev_err_probe(dev, ret, "Failed to add IRQ chip\n");
ret = rt9471_register_psy(chip);
if (ret)
return dev_err_probe(dev, ret, "Failed to register psy\n");
ret = rt9471_register_otg_regulator(chip);
if (ret)
return dev_err_probe(dev, ret, "Failed to register otg\n");
ret = rt9471_register_interrupts(chip);
if (ret)
return ret;
/* After IRQs are all initialized, enable port detection by default */
return regmap_field_write(chip->rm_fields[F_BC12_EN], 1);
}
static void rt9471_shutdown(struct i2c_client *i2c)
{
struct rt9471_chip *chip = i2c_get_clientdata(i2c);
/*
* There's no external reset pin. Do register reset to guarantee charger
* function is normal after shutdown
*/
regmap_field_write(chip->rm_fields[F_REG_RST], 1);
}
static const struct of_device_id rt9471_of_device_id[] = {
{ .compatible = "richtek,rt9471" },
{}
};
MODULE_DEVICE_TABLE(of, rt9471_of_device_id);
static struct i2c_driver rt9471_driver = {
.driver = {
.name = "rt9471",
.of_match_table = rt9471_of_device_id,
},
.probe = rt9471_probe,
.shutdown = rt9471_shutdown,
};
module_i2c_driver(rt9471_driver);
MODULE_DESCRIPTION("Richtek RT9471 charger driver");
MODULE_AUTHOR("Alina Yu <[email protected]>");
MODULE_AUTHOR("ChiYuan Huang <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/rt9471.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* TI LP8788 MFD - battery charger driver
*
* Copyright 2012 Texas Instruments
*
* Author: Milo(Woogyom) Kim <[email protected]>
*/
#include <linux/err.h>
#include <linux/iio/consumer.h>
#include <linux/interrupt.h>
#include <linux/irqdomain.h>
#include <linux/mfd/lp8788.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
/* register address */
#define LP8788_CHG_STATUS 0x07
#define LP8788_CHG_IDCIN 0x13
#define LP8788_CHG_IBATT 0x14
#define LP8788_CHG_VTERM 0x15
#define LP8788_CHG_EOC 0x16
/* mask/shift bits */
#define LP8788_CHG_INPUT_STATE_M 0x03 /* Addr 07h */
#define LP8788_CHG_STATE_M 0x3C
#define LP8788_CHG_STATE_S 2
#define LP8788_NO_BATT_M BIT(6)
#define LP8788_BAD_BATT_M BIT(7)
#define LP8788_CHG_IBATT_M 0x1F /* Addr 14h */
#define LP8788_CHG_VTERM_M 0x0F /* Addr 15h */
#define LP8788_CHG_EOC_LEVEL_M 0x30 /* Addr 16h */
#define LP8788_CHG_EOC_LEVEL_S 4
#define LP8788_CHG_EOC_TIME_M 0x0E
#define LP8788_CHG_EOC_TIME_S 1
#define LP8788_CHG_EOC_MODE_M BIT(0)
#define LP8788_CHARGER_NAME "charger"
#define LP8788_BATTERY_NAME "main_batt"
#define LP8788_CHG_START 0x11
#define LP8788_CHG_END 0x1C
#define LP8788_ISEL_MAX 23
#define LP8788_ISEL_STEP 50
#define LP8788_VTERM_MIN 4100
#define LP8788_VTERM_STEP 25
#define LP8788_MAX_BATT_CAPACITY 100
#define LP8788_MAX_CHG_IRQS 11
enum lp8788_charging_state {
LP8788_OFF,
LP8788_WARM_UP,
LP8788_LOW_INPUT = 0x3,
LP8788_PRECHARGE,
LP8788_CC,
LP8788_CV,
LP8788_MAINTENANCE,
LP8788_BATTERY_FAULT,
LP8788_SYSTEM_SUPPORT = 0xC,
LP8788_HIGH_CURRENT = 0xF,
LP8788_MAX_CHG_STATE,
};
enum lp8788_charger_adc_sel {
LP8788_VBATT,
LP8788_BATT_TEMP,
LP8788_NUM_CHG_ADC,
};
enum lp8788_charger_input_state {
LP8788_SYSTEM_SUPPLY = 1,
LP8788_FULL_FUNCTION,
};
/*
* struct lp8788_chg_irq
* @which : lp8788 interrupt id
* @virq : Linux IRQ number from irq_domain
*/
struct lp8788_chg_irq {
enum lp8788_int_id which;
int virq;
};
/*
* struct lp8788_charger
* @lp : used for accessing the registers of mfd lp8788 device
* @charger : power supply driver for the battery charger
* @battery : power supply driver for the battery
* @charger_work : work queue for charger input interrupts
* @chan : iio channels for getting adc values
* eg) battery voltage, capacity and temperature
* @irqs : charger dedicated interrupts
* @num_irqs : total numbers of charger interrupts
* @pdata : charger platform specific data
*/
struct lp8788_charger {
struct lp8788 *lp;
struct power_supply *charger;
struct power_supply *battery;
struct work_struct charger_work;
struct iio_channel *chan[LP8788_NUM_CHG_ADC];
struct lp8788_chg_irq irqs[LP8788_MAX_CHG_IRQS];
int num_irqs;
struct lp8788_charger_platform_data *pdata;
};
static char *battery_supplied_to[] = {
LP8788_BATTERY_NAME,
};
static enum power_supply_property lp8788_charger_prop[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CURRENT_MAX,
};
static enum power_supply_property lp8788_battery_prop[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_TEMP,
};
static bool lp8788_is_charger_detected(struct lp8788_charger *pchg)
{
u8 data;
lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
data &= LP8788_CHG_INPUT_STATE_M;
return data == LP8788_SYSTEM_SUPPLY || data == LP8788_FULL_FUNCTION;
}
static int lp8788_charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct lp8788_charger *pchg = dev_get_drvdata(psy->dev.parent);
u8 read;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = lp8788_is_charger_detected(pchg);
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
lp8788_read_byte(pchg->lp, LP8788_CHG_IDCIN, &read);
val->intval = LP8788_ISEL_STEP *
(min_t(int, read, LP8788_ISEL_MAX) + 1);
break;
default:
return -EINVAL;
}
return 0;
}
static int lp8788_get_battery_status(struct lp8788_charger *pchg,
union power_supply_propval *val)
{
enum lp8788_charging_state state;
u8 data;
int ret;
ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
if (ret)
return ret;
state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S;
switch (state) {
case LP8788_OFF:
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
break;
case LP8788_PRECHARGE:
case LP8788_CC:
case LP8788_CV:
case LP8788_HIGH_CURRENT:
val->intval = POWER_SUPPLY_STATUS_CHARGING;
break;
case LP8788_MAINTENANCE:
val->intval = POWER_SUPPLY_STATUS_FULL;
break;
default:
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
}
return 0;
}
static int lp8788_get_battery_health(struct lp8788_charger *pchg,
union power_supply_propval *val)
{
u8 data;
int ret;
ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
if (ret)
return ret;
if (data & LP8788_NO_BATT_M)
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
else if (data & LP8788_BAD_BATT_M)
val->intval = POWER_SUPPLY_HEALTH_DEAD;
else
val->intval = POWER_SUPPLY_HEALTH_GOOD;
return 0;
}
static int lp8788_get_battery_present(struct lp8788_charger *pchg,
union power_supply_propval *val)
{
u8 data;
int ret;
ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
if (ret)
return ret;
val->intval = !(data & LP8788_NO_BATT_M);
return 0;
}
static int lp8788_get_vbatt_adc(struct lp8788_charger *pchg, int *result)
{
struct iio_channel *channel = pchg->chan[LP8788_VBATT];
if (!channel)
return -EINVAL;
return iio_read_channel_processed(channel, result);
}
static int lp8788_get_battery_voltage(struct lp8788_charger *pchg,
union power_supply_propval *val)
{
return lp8788_get_vbatt_adc(pchg, &val->intval);
}
static int lp8788_get_battery_capacity(struct lp8788_charger *pchg,
union power_supply_propval *val)
{
struct lp8788 *lp = pchg->lp;
struct lp8788_charger_platform_data *pdata = pchg->pdata;
unsigned int max_vbatt;
int vbatt;
enum lp8788_charging_state state;
u8 data;
int ret;
if (!pdata)
return -EINVAL;
max_vbatt = pdata->max_vbatt_mv;
if (max_vbatt == 0)
return -EINVAL;
ret = lp8788_read_byte(lp, LP8788_CHG_STATUS, &data);
if (ret)
return ret;
state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S;
if (state == LP8788_MAINTENANCE) {
val->intval = LP8788_MAX_BATT_CAPACITY;
} else {
ret = lp8788_get_vbatt_adc(pchg, &vbatt);
if (ret)
return ret;
val->intval = (vbatt * LP8788_MAX_BATT_CAPACITY) / max_vbatt;
val->intval = min(val->intval, LP8788_MAX_BATT_CAPACITY);
}
return 0;
}
static int lp8788_get_battery_temperature(struct lp8788_charger *pchg,
union power_supply_propval *val)
{
struct iio_channel *channel = pchg->chan[LP8788_BATT_TEMP];
int result;
int ret;
if (!channel)
return -EINVAL;
ret = iio_read_channel_processed(channel, &result);
if (ret < 0)
return -EINVAL;
/* unit: 0.1 'C */
val->intval = result * 10;
return 0;
}
static int lp8788_get_battery_charging_current(struct lp8788_charger *pchg,
union power_supply_propval *val)
{
u8 read;
lp8788_read_byte(pchg->lp, LP8788_CHG_IBATT, &read);
read &= LP8788_CHG_IBATT_M;
val->intval = LP8788_ISEL_STEP *
(min_t(int, read, LP8788_ISEL_MAX) + 1);
return 0;
}
static int lp8788_get_charging_termination_voltage(struct lp8788_charger *pchg,
union power_supply_propval *val)
{
u8 read;
lp8788_read_byte(pchg->lp, LP8788_CHG_VTERM, &read);
read &= LP8788_CHG_VTERM_M;
val->intval = LP8788_VTERM_MIN + LP8788_VTERM_STEP * read;
return 0;
}
static int lp8788_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct lp8788_charger *pchg = dev_get_drvdata(psy->dev.parent);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
return lp8788_get_battery_status(pchg, val);
case POWER_SUPPLY_PROP_HEALTH:
return lp8788_get_battery_health(pchg, val);
case POWER_SUPPLY_PROP_PRESENT:
return lp8788_get_battery_present(pchg, val);
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
return lp8788_get_battery_voltage(pchg, val);
case POWER_SUPPLY_PROP_CAPACITY:
return lp8788_get_battery_capacity(pchg, val);
case POWER_SUPPLY_PROP_TEMP:
return lp8788_get_battery_temperature(pchg, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
return lp8788_get_battery_charging_current(pchg, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
return lp8788_get_charging_termination_voltage(pchg, val);
default:
return -EINVAL;
}
}
static inline bool lp8788_is_valid_charger_register(u8 addr)
{
return addr >= LP8788_CHG_START && addr <= LP8788_CHG_END;
}
static int lp8788_update_charger_params(struct platform_device *pdev,
struct lp8788_charger *pchg)
{
struct lp8788 *lp = pchg->lp;
struct lp8788_charger_platform_data *pdata = pchg->pdata;
struct lp8788_chg_param *param;
int i;
int ret;
if (!pdata || !pdata->chg_params) {
dev_info(&pdev->dev, "skip updating charger parameters\n");
return 0;
}
/* setting charging parameters */
for (i = 0; i < pdata->num_chg_params; i++) {
param = pdata->chg_params + i;
if (lp8788_is_valid_charger_register(param->addr)) {
ret = lp8788_write_byte(lp, param->addr, param->val);
if (ret)
return ret;
}
}
return 0;
}
static const struct power_supply_desc lp8788_psy_charger_desc = {
.name = LP8788_CHARGER_NAME,
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = lp8788_charger_prop,
.num_properties = ARRAY_SIZE(lp8788_charger_prop),
.get_property = lp8788_charger_get_property,
};
static const struct power_supply_desc lp8788_psy_battery_desc = {
.name = LP8788_BATTERY_NAME,
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = lp8788_battery_prop,
.num_properties = ARRAY_SIZE(lp8788_battery_prop),
.get_property = lp8788_battery_get_property,
};
static void lp8788_psy_unregister(struct lp8788_charger *pchg)
{
power_supply_unregister(pchg->battery);
power_supply_unregister(pchg->charger);
}
static void lp8788_charger_event(struct work_struct *work)
{
struct lp8788_charger *pchg =
container_of(work, struct lp8788_charger, charger_work);
struct lp8788_charger_platform_data *pdata = pchg->pdata;
enum lp8788_charger_event event = lp8788_is_charger_detected(pchg);
pdata->charger_event(pchg->lp, event);
}
static bool lp8788_find_irq_id(struct lp8788_charger *pchg, int virq, int *id)
{
bool found = false;
int i;
for (i = 0; i < pchg->num_irqs; i++) {
if (pchg->irqs[i].virq == virq) {
*id = pchg->irqs[i].which;
found = true;
break;
}
}
return found;
}
static irqreturn_t lp8788_charger_irq_thread(int virq, void *ptr)
{
struct lp8788_charger *pchg = ptr;
struct lp8788_charger_platform_data *pdata = pchg->pdata;
int id = -1;
if (!lp8788_find_irq_id(pchg, virq, &id))
return IRQ_NONE;
switch (id) {
case LP8788_INT_CHG_INPUT_STATE:
case LP8788_INT_CHG_STATE:
case LP8788_INT_EOC:
case LP8788_INT_BATT_LOW:
case LP8788_INT_NO_BATT:
power_supply_changed(pchg->charger);
power_supply_changed(pchg->battery);
break;
default:
break;
}
/* report charger dectection event if used */
if (!pdata)
goto irq_handled;
if (pdata->charger_event && id == LP8788_INT_CHG_INPUT_STATE)
schedule_work(&pchg->charger_work);
irq_handled:
return IRQ_HANDLED;
}
static int lp8788_set_irqs(struct platform_device *pdev,
struct lp8788_charger *pchg, const char *name)
{
struct resource *r;
struct irq_domain *irqdm = pchg->lp->irqdm;
int irq_start;
int irq_end;
int virq;
int nr_irq;
int i;
int ret;
/* no error even if no irq resource */
r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, name);
if (!r)
return 0;
irq_start = r->start;
irq_end = r->end;
for (i = irq_start; i <= irq_end; i++) {
nr_irq = pchg->num_irqs;
virq = irq_create_mapping(irqdm, i);
pchg->irqs[nr_irq].virq = virq;
pchg->irqs[nr_irq].which = i;
pchg->num_irqs++;
ret = request_threaded_irq(virq, NULL,
lp8788_charger_irq_thread,
IRQF_ONESHOT, name, pchg);
if (ret)
break;
}
if (i <= irq_end)
goto err_free_irq;
return 0;
err_free_irq:
for (i = 0; i < pchg->num_irqs; i++)
free_irq(pchg->irqs[i].virq, pchg);
return ret;
}
static int lp8788_irq_register(struct platform_device *pdev,
struct lp8788_charger *pchg)
{
static const char * const name[] = {
LP8788_CHG_IRQ, LP8788_PRSW_IRQ, LP8788_BATT_IRQ
};
int i;
int ret;
INIT_WORK(&pchg->charger_work, lp8788_charger_event);
pchg->num_irqs = 0;
for (i = 0; i < ARRAY_SIZE(name); i++) {
ret = lp8788_set_irqs(pdev, pchg, name[i]);
if (ret) {
dev_warn(&pdev->dev, "irq setup failed: %s\n", name[i]);
return ret;
}
}
if (pchg->num_irqs > LP8788_MAX_CHG_IRQS) {
dev_err(&pdev->dev, "invalid total number of irqs: %d\n",
pchg->num_irqs);
return -EINVAL;
}
return 0;
}
static void lp8788_irq_unregister(struct platform_device *pdev,
struct lp8788_charger *pchg)
{
int i;
int irq;
for (i = 0; i < pchg->num_irqs; i++) {
irq = pchg->irqs[i].virq;
if (!irq)
continue;
free_irq(irq, pchg);
}
}
static void lp8788_setup_adc_channel(struct device *dev,
struct lp8788_charger *pchg)
{
struct lp8788_charger_platform_data *pdata = pchg->pdata;
struct iio_channel *chan;
if (!pdata)
return;
/* ADC channel for battery voltage */
chan = devm_iio_channel_get(dev, pdata->adc_vbatt);
pchg->chan[LP8788_VBATT] = IS_ERR(chan) ? NULL : chan;
/* ADC channel for battery temperature */
chan = devm_iio_channel_get(dev, pdata->adc_batt_temp);
pchg->chan[LP8788_BATT_TEMP] = IS_ERR(chan) ? NULL : chan;
}
static ssize_t lp8788_show_charger_status(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct lp8788_charger *pchg = dev_get_drvdata(dev);
enum lp8788_charging_state state;
static const char * const desc[LP8788_MAX_CHG_STATE] = {
[LP8788_OFF] = "CHARGER OFF",
[LP8788_WARM_UP] = "WARM UP",
[LP8788_LOW_INPUT] = "LOW INPUT STATE",
[LP8788_PRECHARGE] = "CHARGING - PRECHARGE",
[LP8788_CC] = "CHARGING - CC",
[LP8788_CV] = "CHARGING - CV",
[LP8788_MAINTENANCE] = "NO CHARGING - MAINTENANCE",
[LP8788_BATTERY_FAULT] = "BATTERY FAULT",
[LP8788_SYSTEM_SUPPORT] = "SYSTEM SUPPORT",
[LP8788_HIGH_CURRENT] = "HIGH CURRENT",
};
u8 data;
lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S;
return sysfs_emit(buf, "%s\n", desc[state]);
}
static ssize_t lp8788_show_eoc_time(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct lp8788_charger *pchg = dev_get_drvdata(dev);
static const char * const stime[] = {
"400ms", "5min", "10min", "15min",
"20min", "25min", "30min", "No timeout"
};
u8 val;
lp8788_read_byte(pchg->lp, LP8788_CHG_EOC, &val);
val = (val & LP8788_CHG_EOC_TIME_M) >> LP8788_CHG_EOC_TIME_S;
return sysfs_emit(buf, "End Of Charge Time: %s\n", stime[val]);
}
static ssize_t lp8788_show_eoc_level(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct lp8788_charger *pchg = dev_get_drvdata(dev);
static const char * const abs_level[] = {
"25mA", "49mA", "75mA", "98mA"
};
static const char * const relative_level[] = {
"5%", "10%", "15%", "20%"
};
const char *level;
u8 val;
u8 mode;
lp8788_read_byte(pchg->lp, LP8788_CHG_EOC, &val);
mode = val & LP8788_CHG_EOC_MODE_M;
val = (val & LP8788_CHG_EOC_LEVEL_M) >> LP8788_CHG_EOC_LEVEL_S;
level = mode ? abs_level[val] : relative_level[val];
return sysfs_emit(buf, "End Of Charge Level: %s\n", level);
}
static DEVICE_ATTR(charger_status, S_IRUSR, lp8788_show_charger_status, NULL);
static DEVICE_ATTR(eoc_time, S_IRUSR, lp8788_show_eoc_time, NULL);
static DEVICE_ATTR(eoc_level, S_IRUSR, lp8788_show_eoc_level, NULL);
static struct attribute *lp8788_charger_sysfs_attrs[] = {
&dev_attr_charger_status.attr,
&dev_attr_eoc_time.attr,
&dev_attr_eoc_level.attr,
NULL,
};
ATTRIBUTE_GROUPS(lp8788_charger_sysfs);
static int lp8788_psy_register(struct platform_device *pdev,
struct lp8788_charger *pchg)
{
struct power_supply_config charger_cfg = {};
charger_cfg.attr_grp = lp8788_charger_sysfs_groups;
charger_cfg.supplied_to = battery_supplied_to;
charger_cfg.num_supplicants = ARRAY_SIZE(battery_supplied_to);
pchg->charger = power_supply_register(&pdev->dev,
&lp8788_psy_charger_desc,
&charger_cfg);
if (IS_ERR(pchg->charger))
return -EPERM;
pchg->battery = power_supply_register(&pdev->dev,
&lp8788_psy_battery_desc, NULL);
if (IS_ERR(pchg->battery)) {
power_supply_unregister(pchg->charger);
return -EPERM;
}
return 0;
}
static int lp8788_charger_probe(struct platform_device *pdev)
{
struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent);
struct lp8788_charger *pchg;
struct device *dev = &pdev->dev;
int ret;
pchg = devm_kzalloc(dev, sizeof(struct lp8788_charger), GFP_KERNEL);
if (!pchg)
return -ENOMEM;
pchg->lp = lp;
pchg->pdata = lp->pdata ? lp->pdata->chg_pdata : NULL;
platform_set_drvdata(pdev, pchg);
ret = lp8788_update_charger_params(pdev, pchg);
if (ret)
return ret;
lp8788_setup_adc_channel(&pdev->dev, pchg);
ret = lp8788_psy_register(pdev, pchg);
if (ret)
return ret;
ret = lp8788_irq_register(pdev, pchg);
if (ret)
dev_warn(dev, "failed to register charger irq: %d\n", ret);
return 0;
}
static int lp8788_charger_remove(struct platform_device *pdev)
{
struct lp8788_charger *pchg = platform_get_drvdata(pdev);
flush_work(&pchg->charger_work);
lp8788_irq_unregister(pdev, pchg);
lp8788_psy_unregister(pchg);
return 0;
}
static struct platform_driver lp8788_charger_driver = {
.probe = lp8788_charger_probe,
.remove = lp8788_charger_remove,
.driver = {
.name = LP8788_DEV_CHARGER,
},
};
module_platform_driver(lp8788_charger_driver);
MODULE_DESCRIPTION("TI LP8788 Charger Driver");
MODULE_AUTHOR("Milo Kim");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:lp8788-charger");
| linux-master | drivers/power/supply/lp8788-charger.c |
// SPDX-License-Identifier: GPL-2.0+
/*
* Charger Driver for Rockchip rk817
*
* Copyright (c) 2021 Maya Matuszczyk <[email protected]>
*
* Authors: Maya Matuszczyk <[email protected]>
* Chris Morgan <[email protected]>
*/
#include <asm/unaligned.h>
#include <linux/devm-helpers.h>
#include <linux/mfd/rk808.h>
#include <linux/irq.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
/* Charging statuses reported by hardware register */
enum rk817_charge_status {
CHRG_OFF,
DEAD_CHRG,
TRICKLE_CHRG,
CC_OR_CV_CHRG,
CHARGE_FINISH,
USB_OVER_VOL,
BAT_TMP_ERR,
BAT_TIM_ERR,
};
/*
* Max charging current read to/written from hardware register.
* Note how highest value corresponding to 0x7 is the lowest
* current, this is per the datasheet.
*/
enum rk817_chg_cur {
CHG_1A,
CHG_1_5A,
CHG_2A,
CHG_2_5A,
CHG_2_75A,
CHG_3A,
CHG_3_5A,
CHG_0_5A,
};
struct rk817_charger {
struct device *dev;
struct rk808 *rk808;
struct power_supply *bat_ps;
struct power_supply *chg_ps;
bool plugged_in;
bool battery_present;
/*
* voltage_k and voltage_b values are used to calibrate the ADC
* voltage readings. While they are documented in the BSP kernel and
* datasheet as voltage_k and voltage_b, there is no further
* information explaining them in more detail.
*/
uint32_t voltage_k;
uint32_t voltage_b;
/*
* soc - state of charge - like the BSP this is stored as a percentage,
* to the thousandth. BSP has a display state of charge (dsoc) and a
* remaining state of charge (rsoc). This value will be used for both
* purposes here so we don't do any fancy math to try and "smooth" the
* charge and just report it as it is. Note for example an soc of 100
* is stored as 100000, an soc of 50 is stored as 50000, etc.
*/
int soc;
/*
* Capacity of battery when fully charged, equal or less than design
* capacity depending upon wear. BSP kernel saves to nvram in mAh,
* so this value is in mAh not the standard uAh.
*/
int fcc_mah;
/*
* Calibrate the SOC on a fully charged battery, this way we can use
* the calibrated SOC value to correct for columb counter drift.
*/
bool soc_cal;
/* Implementation specific immutable properties from device tree */
int res_div;
int sleep_enter_current_ua;
int sleep_filter_current_ua;
int bat_charge_full_design_uah;
int bat_voltage_min_design_uv;
int bat_voltage_max_design_uv;
/* Values updated periodically by driver for display. */
int charge_now_uah;
int volt_avg_uv;
int cur_avg_ua;
int max_chg_cur_ua;
int max_chg_volt_uv;
int charge_status;
int charger_input_volt_avg_uv;
/* Work queue to periodically update values. */
struct delayed_work work;
};
/* ADC coefficients extracted from BSP kernel */
#define ADC_TO_CURRENT(adc_value, res_div) \
(adc_value * 172 / res_div)
#define CURRENT_TO_ADC(current, samp_res) \
(current * samp_res / 172)
#define CHARGE_TO_ADC(capacity, res_div) \
(capacity * res_div * 3600 / 172 * 1000)
#define ADC_TO_CHARGE_UAH(adc_value, res_div) \
(adc_value / 3600 * 172 / res_div)
static int rk817_chg_cur_to_reg(u32 chg_cur_ma)
{
if (chg_cur_ma >= 3500)
return CHG_3_5A;
else if (chg_cur_ma >= 3000)
return CHG_3A;
else if (chg_cur_ma >= 2750)
return CHG_2_75A;
else if (chg_cur_ma >= 2500)
return CHG_2_5A;
else if (chg_cur_ma >= 2000)
return CHG_2A;
else if (chg_cur_ma >= 1500)
return CHG_1_5A;
else if (chg_cur_ma >= 1000)
return CHG_1A;
else if (chg_cur_ma >= 500)
return CHG_0_5A;
else
return -EINVAL;
}
static int rk817_chg_cur_from_reg(u8 reg)
{
switch (reg) {
case CHG_0_5A:
return 500000;
case CHG_1A:
return 1000000;
case CHG_1_5A:
return 1500000;
case CHG_2A:
return 2000000;
case CHG_2_5A:
return 2500000;
case CHG_2_75A:
return 2750000;
case CHG_3A:
return 3000000;
case CHG_3_5A:
return 3500000;
default:
return -EINVAL;
}
}
static void rk817_bat_calib_vol(struct rk817_charger *charger)
{
uint32_t vcalib0 = 0;
uint32_t vcalib1 = 0;
u8 bulk_reg[2];
/* calibrate voltage */
regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_VCALIB0_H,
bulk_reg, 2);
vcalib0 = get_unaligned_be16(bulk_reg);
regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_VCALIB1_H,
bulk_reg, 2);
vcalib1 = get_unaligned_be16(bulk_reg);
/* values were taken from BSP kernel */
charger->voltage_k = (4025 - 2300) * 1000 /
((vcalib1 - vcalib0) ? (vcalib1 - vcalib0) : 1);
charger->voltage_b = 4025 - (charger->voltage_k * vcalib1) / 1000;
}
static void rk817_bat_calib_cur(struct rk817_charger *charger)
{
u8 bulk_reg[2];
/* calibrate current */
regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_IOFFSET_H,
bulk_reg, 2);
regmap_bulk_write(charger->rk808->regmap, RK817_GAS_GAUGE_CAL_OFFSET_H,
bulk_reg, 2);
}
/*
* note that only the fcc_mah is really used by this driver, the other values
* are to ensure we can remain backwards compatible with the BSP kernel.
*/
static int rk817_record_battery_nvram_values(struct rk817_charger *charger)
{
u8 bulk_reg[3];
int ret, rsoc;
/*
* write the soc value to the nvram location used by the BSP kernel
* for the dsoc value.
*/
put_unaligned_le24(charger->soc, bulk_reg);
ret = regmap_bulk_write(charger->rk808->regmap, RK817_GAS_GAUGE_BAT_R1,
bulk_reg, 3);
if (ret < 0)
return ret;
/*
* write the remaining capacity in mah to the nvram location used by
* the BSP kernel for the rsoc value.
*/
rsoc = (charger->soc * charger->fcc_mah) / 100000;
put_unaligned_le24(rsoc, bulk_reg);
ret = regmap_bulk_write(charger->rk808->regmap, RK817_GAS_GAUGE_DATA0,
bulk_reg, 3);
if (ret < 0)
return ret;
/* write the fcc_mah in mAh, just as the BSP kernel does. */
put_unaligned_le24(charger->fcc_mah, bulk_reg);
ret = regmap_bulk_write(charger->rk808->regmap, RK817_GAS_GAUGE_DATA3,
bulk_reg, 3);
if (ret < 0)
return ret;
return 0;
}
static int rk817_bat_calib_cap(struct rk817_charger *charger)
{
struct rk808 *rk808 = charger->rk808;
int tmp, charge_now, charge_now_adc, volt_avg;
u8 bulk_reg[4];
/* Calibrate the soc and fcc on a fully charged battery */
if (charger->charge_status == CHARGE_FINISH && (!charger->soc_cal)) {
/*
* soc should be 100000 and columb counter should show the full
* charge capacity. Note that if the device is unplugged for a
* period of several days the columb counter will have a large
* margin of error, so setting it back to the full charge on
* a completed charge cycle should correct this (my device was
* showing 33% battery after 3 days unplugged when it should
* have been closer to 95% based on voltage and charge
* current).
*/
charger->soc = 100000;
charge_now_adc = CHARGE_TO_ADC(charger->fcc_mah,
charger->res_div);
put_unaligned_be32(charge_now_adc, bulk_reg);
regmap_bulk_write(rk808->regmap, RK817_GAS_GAUGE_Q_INIT_H3,
bulk_reg, 4);
charger->soc_cal = 1;
dev_dbg(charger->dev,
"Fully charged. SOC is %d, full capacity is %d\n",
charger->soc, charger->fcc_mah * 1000);
}
/*
* The columb counter can drift up slightly, so we should correct for
* it. But don't correct it until we're at 100% soc.
*/
if (charger->charge_status == CHARGE_FINISH && charger->soc_cal) {
regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_Q_PRES_H3,
bulk_reg, 4);
charge_now_adc = get_unaligned_be32(bulk_reg);
if (charge_now_adc < 0)
return charge_now_adc;
charge_now = ADC_TO_CHARGE_UAH(charge_now_adc,
charger->res_div);
/*
* Re-init columb counter with updated values to correct drift.
*/
if (charge_now / 1000 > charger->fcc_mah) {
dev_dbg(charger->dev,
"Recalibrating columb counter to %d uah\n",
charge_now);
/*
* Order of operations matters here to ensure we keep
* enough precision until the last step to keep from
* making needless updates to columb counter.
*/
charge_now_adc = CHARGE_TO_ADC(charger->fcc_mah,
charger->res_div);
put_unaligned_be32(charge_now_adc, bulk_reg);
regmap_bulk_write(rk808->regmap,
RK817_GAS_GAUGE_Q_INIT_H3,
bulk_reg, 4);
}
}
/*
* Calibrate the fully charged capacity when we previously had a full
* battery (soc_cal = 1) and are now empty (at or below minimum design
* voltage). If our columb counter is still positive, subtract that
* from our fcc value to get a calibrated fcc, and if our columb
* counter is negative add that to our fcc (but not to exceed our
* design capacity).
*/
regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_BAT_VOL_H,
bulk_reg, 2);
tmp = get_unaligned_be16(bulk_reg);
volt_avg = (charger->voltage_k * tmp) + 1000 * charger->voltage_b;
if (volt_avg <= charger->bat_voltage_min_design_uv &&
charger->soc_cal) {
regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_Q_PRES_H3,
bulk_reg, 4);
charge_now_adc = get_unaligned_be32(bulk_reg);
charge_now = ADC_TO_CHARGE_UAH(charge_now_adc,
charger->res_div);
/*
* Note, if charge_now is negative this will add it (what we
* want) and if it's positive this will subtract (also what
* we want).
*/
charger->fcc_mah = charger->fcc_mah - (charge_now / 1000);
dev_dbg(charger->dev,
"Recalibrating full charge capacity to %d uah\n",
charger->fcc_mah * 1000);
}
/*
* Set the SOC to 0 if we are below the minimum system voltage.
*/
if (volt_avg <= charger->bat_voltage_min_design_uv) {
charger->soc = 0;
charge_now_adc = CHARGE_TO_ADC(0, charger->res_div);
put_unaligned_be32(charge_now_adc, bulk_reg);
regmap_bulk_write(rk808->regmap,
RK817_GAS_GAUGE_Q_INIT_H3, bulk_reg, 4);
dev_warn(charger->dev,
"Battery voltage %d below minimum voltage %d\n",
volt_avg, charger->bat_voltage_min_design_uv);
}
rk817_record_battery_nvram_values(charger);
return 0;
}
static void rk817_read_props(struct rk817_charger *charger)
{
int tmp, reg;
u8 bulk_reg[4];
/*
* Recalibrate voltage and current readings if we need to BSP does both
* on CUR_CALIB_UPD, ignoring VOL_CALIB_UPD. Curiously enough, both
* documentation and the BSP show that you perform an update if bit 7
* is 1, but you clear the status by writing a 1 to bit 7.
*/
regmap_read(charger->rk808->regmap, RK817_GAS_GAUGE_ADC_CONFIG1, ®);
if (reg & RK817_VOL_CUR_CALIB_UPD) {
rk817_bat_calib_cur(charger);
rk817_bat_calib_vol(charger);
regmap_write_bits(charger->rk808->regmap,
RK817_GAS_GAUGE_ADC_CONFIG1,
RK817_VOL_CUR_CALIB_UPD,
RK817_VOL_CUR_CALIB_UPD);
}
/* Update reported charge. */
regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_Q_PRES_H3,
bulk_reg, 4);
tmp = get_unaligned_be32(bulk_reg);
charger->charge_now_uah = ADC_TO_CHARGE_UAH(tmp, charger->res_div);
if (charger->charge_now_uah < 0)
charger->charge_now_uah = 0;
if (charger->charge_now_uah > charger->fcc_mah * 1000)
charger->charge_now_uah = charger->fcc_mah * 1000;
/* Update soc based on reported charge. */
charger->soc = charger->charge_now_uah * 100 / charger->fcc_mah;
/* Update reported voltage. */
regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_BAT_VOL_H,
bulk_reg, 2);
tmp = get_unaligned_be16(bulk_reg);
charger->volt_avg_uv = (charger->voltage_k * tmp) + 1000 *
charger->voltage_b;
/*
* Update reported current. Note value from registers is a signed 16
* bit int.
*/
regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_BAT_CUR_H,
bulk_reg, 2);
tmp = (short int)get_unaligned_be16(bulk_reg);
charger->cur_avg_ua = ADC_TO_CURRENT(tmp, charger->res_div);
/*
* Update the max charge current. This value shouldn't change, but we
* can read it to report what the PMIC says it is instead of simply
* returning the default value.
*/
regmap_read(charger->rk808->regmap, RK817_PMIC_CHRG_OUT, ®);
charger->max_chg_cur_ua =
rk817_chg_cur_from_reg(reg & RK817_CHRG_CUR_SEL);
/*
* Update max charge voltage. Like the max charge current this value
* shouldn't change, but we can report what the PMIC says.
*/
regmap_read(charger->rk808->regmap, RK817_PMIC_CHRG_OUT, ®);
charger->max_chg_volt_uv = ((((reg & RK817_CHRG_VOL_SEL) >> 4) *
50000) + 4100000);
/* Check if battery still present. */
regmap_read(charger->rk808->regmap, RK817_PMIC_CHRG_STS, ®);
charger->battery_present = (reg & RK817_BAT_EXS);
/* Get which type of charge we are using (if any). */
regmap_read(charger->rk808->regmap, RK817_PMIC_CHRG_STS, ®);
charger->charge_status = (reg >> 4) & 0x07;
/*
* Get charger input voltage. Note that on my example hardware (an
* Odroid Go Advance) the voltage of the power connector is measured
* on the register labelled USB in the datasheet; I don't know if this
* is how it is designed or just a quirk of the implementation. I
* believe this will also measure the voltage of the USB output when in
* OTG mode, if that is the case we may need to change this in the
* future to return 0 if the power supply status is offline (I can't
* test this with my current implementation. Also, when the voltage
* should be zero sometimes the ADC still shows a single bit (which
* would register as 20000uv). When this happens set it to 0.
*/
regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_USB_VOL_H,
bulk_reg, 2);
reg = get_unaligned_be16(bulk_reg);
if (reg > 1) {
tmp = ((charger->voltage_k * reg / 1000 + charger->voltage_b) *
60 / 46);
charger->charger_input_volt_avg_uv = tmp * 1000;
} else {
charger->charger_input_volt_avg_uv = 0;
}
/* Calibrate battery capacity and soc. */
rk817_bat_calib_cap(charger);
}
static int rk817_bat_get_prop(struct power_supply *ps,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct rk817_charger *charger = power_supply_get_drvdata(ps);
switch (prop) {
case POWER_SUPPLY_PROP_PRESENT:
val->intval = charger->battery_present;
break;
case POWER_SUPPLY_PROP_STATUS:
if (charger->cur_avg_ua < 0) {
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
break;
}
switch (charger->charge_status) {
case CHRG_OFF:
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
/*
* Dead charge is documented, but not explained. I never
* observed it but assume it's a pre-charge for a dead
* battery.
*/
case DEAD_CHRG:
case TRICKLE_CHRG:
case CC_OR_CV_CHRG:
val->intval = POWER_SUPPLY_STATUS_CHARGING;
break;
case CHARGE_FINISH:
val->intval = POWER_SUPPLY_STATUS_FULL;
break;
default:
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
return -EINVAL;
}
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
switch (charger->charge_status) {
case CHRG_OFF:
case CHARGE_FINISH:
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
case TRICKLE_CHRG:
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
case DEAD_CHRG:
case CC_OR_CV_CHRG:
val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
break;
default:
val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
break;
}
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
val->intval = charger->fcc_mah * 1000;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
val->intval = charger->bat_charge_full_design_uah;
break;
case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
val->intval = 0;
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
val->intval = charger->charge_now_uah;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
val->intval = charger->bat_voltage_min_design_uv;
break;
case POWER_SUPPLY_PROP_CAPACITY:
/* Add 500 so that values like 99999 are 100% not 99%. */
val->intval = (charger->soc + 500) / 1000;
if (val->intval > 100)
val->intval = 100;
if (val->intval < 0)
val->intval = 0;
break;
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
val->intval = charger->volt_avg_uv;
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
val->intval = charger->cur_avg_ua;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
val->intval = charger->max_chg_cur_ua;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
val->intval = charger->max_chg_volt_uv;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
val->intval = charger->bat_voltage_max_design_uv;
break;
default:
return -EINVAL;
}
return 0;
}
static int rk817_chg_get_prop(struct power_supply *ps,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct rk817_charger *charger = power_supply_get_drvdata(ps);
switch (prop) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = charger->plugged_in;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
/* max voltage from datasheet at 5.5v (default 5.0v) */
val->intval = 5500000;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
/* min voltage from datasheet at 3.8v (default 5.0v) */
val->intval = 3800000;
break;
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
val->intval = charger->charger_input_volt_avg_uv;
break;
/*
* While it's possible that other implementations could use different
* USB types, the current implementation for this PMIC (the Odroid Go
* Advance) only uses a dedicated charging port with no rx/tx lines.
*/
case POWER_SUPPLY_PROP_USB_TYPE:
val->intval = POWER_SUPPLY_USB_TYPE_DCP;
break;
default:
return -EINVAL;
}
return 0;
}
static irqreturn_t rk817_plug_in_isr(int irq, void *cg)
{
struct rk817_charger *charger;
charger = (struct rk817_charger *)cg;
charger->plugged_in = 1;
power_supply_changed(charger->chg_ps);
power_supply_changed(charger->bat_ps);
/* try to recalibrate capacity if we hit full charge. */
charger->soc_cal = 0;
rk817_read_props(charger);
dev_dbg(charger->dev, "Power Cord Inserted\n");
return IRQ_HANDLED;
}
static irqreturn_t rk817_plug_out_isr(int irq, void *cg)
{
struct rk817_charger *charger;
struct rk808 *rk808;
charger = (struct rk817_charger *)cg;
rk808 = charger->rk808;
charger->plugged_in = 0;
power_supply_changed(charger->bat_ps);
power_supply_changed(charger->chg_ps);
/*
* For some reason the bits of RK817_PMIC_CHRG_IN reset whenever the
* power cord is unplugged. This was not documented in the BSP kernel
* or the datasheet and only discovered by trial and error. Set minimum
* USB input voltage to 4.5v and enable USB voltage input limit.
*/
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN,
RK817_USB_VLIM_SEL, (0x05 << 4));
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN, RK817_USB_VLIM_EN,
(0x01 << 7));
/*
* Set average USB input current limit to 1.5A and enable USB current
* input limit.
*/
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN,
RK817_USB_ILIM_SEL, 0x03);
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN, RK817_USB_ILIM_EN,
(0x01 << 3));
rk817_read_props(charger);
dev_dbg(charger->dev, "Power Cord Removed\n");
return IRQ_HANDLED;
}
static enum power_supply_property rk817_bat_props[] = {
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
};
static enum power_supply_property rk817_chg_props[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_USB_TYPE,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
};
static enum power_supply_usb_type rk817_usb_type[] = {
POWER_SUPPLY_USB_TYPE_DCP,
POWER_SUPPLY_USB_TYPE_UNKNOWN,
};
static const struct power_supply_desc rk817_bat_desc = {
.name = "rk817-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = rk817_bat_props,
.num_properties = ARRAY_SIZE(rk817_bat_props),
.get_property = rk817_bat_get_prop,
};
static const struct power_supply_desc rk817_chg_desc = {
.name = "rk817-charger",
.type = POWER_SUPPLY_TYPE_USB,
.usb_types = rk817_usb_type,
.num_usb_types = ARRAY_SIZE(rk817_usb_type),
.properties = rk817_chg_props,
.num_properties = ARRAY_SIZE(rk817_chg_props),
.get_property = rk817_chg_get_prop,
};
static int rk817_read_battery_nvram_values(struct rk817_charger *charger)
{
u8 bulk_reg[3];
int ret;
/* Read the nvram data for full charge capacity. */
ret = regmap_bulk_read(charger->rk808->regmap,
RK817_GAS_GAUGE_DATA3, bulk_reg, 3);
if (ret < 0)
return ret;
charger->fcc_mah = get_unaligned_le24(bulk_reg);
/*
* Sanity checking for values equal to zero or less than would be
* practical for this device (BSP Kernel assumes 500mAH or less) for
* practicality purposes. Also check if the value is too large and
* correct it.
*/
if ((charger->fcc_mah < 500) ||
((charger->fcc_mah * 1000) > charger->bat_charge_full_design_uah)) {
dev_info(charger->dev,
"Invalid NVRAM max charge, setting to %u uAH\n",
charger->bat_charge_full_design_uah);
charger->fcc_mah = charger->bat_charge_full_design_uah / 1000;
}
/*
* Read the nvram for state of charge. Sanity check for values greater
* than 100 (10000) or less than 0, because other things (BSP kernels,
* U-Boot, or even i2cset) can write to this register. If the value is
* off it should get corrected automatically when the voltage drops to
* the min (soc is 0) or when the battery is full (soc is 100).
*/
ret = regmap_bulk_read(charger->rk808->regmap,
RK817_GAS_GAUGE_BAT_R1, bulk_reg, 3);
if (ret < 0)
return ret;
charger->soc = get_unaligned_le24(bulk_reg);
if (charger->soc > 10000)
charger->soc = 10000;
if (charger->soc < 0)
charger->soc = 0;
return 0;
}
static int
rk817_read_or_set_full_charge_on_boot(struct rk817_charger *charger,
struct power_supply_battery_info *bat_info)
{
struct rk808 *rk808 = charger->rk808;
u8 bulk_reg[4];
u32 boot_voltage, boot_charge_mah;
int ret, reg, off_time, tmp;
bool first_boot;
/*
* Check if the battery is uninitalized. If it is, the columb counter
* needs to be set up.
*/
ret = regmap_read(rk808->regmap, RK817_GAS_GAUGE_GG_STS, ®);
if (ret < 0)
return ret;
first_boot = reg & RK817_BAT_CON;
/*
* If the battery is uninitialized, use the poweron voltage and an ocv
* lookup to guess our charge. The number won't be very accurate until
* we hit either our minimum voltage (0%) or full charge (100%).
*/
if (first_boot) {
regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_PWRON_VOL_H,
bulk_reg, 2);
tmp = get_unaligned_be16(bulk_reg);
boot_voltage = (charger->voltage_k * tmp) +
1000 * charger->voltage_b;
/*
* Since only implementation has no working thermistor, assume
* 20C for OCV lookup. If lookup fails, report error with OCV
* table.
*/
charger->soc = power_supply_batinfo_ocv2cap(bat_info,
boot_voltage,
20) * 1000;
if (charger->soc < 0)
charger->soc = 0;
/* Guess that full charge capacity is the design capacity */
charger->fcc_mah = charger->bat_charge_full_design_uah / 1000;
/*
* Set battery as "set up". BSP driver uses this value even
* though datasheet claims it's a read-only value.
*/
regmap_write_bits(rk808->regmap, RK817_GAS_GAUGE_GG_STS,
RK817_BAT_CON, 0);
/* Save nvram values */
ret = rk817_record_battery_nvram_values(charger);
if (ret < 0)
return ret;
} else {
ret = rk817_read_battery_nvram_values(charger);
if (ret < 0)
return ret;
regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_Q_PRES_H3,
bulk_reg, 4);
tmp = get_unaligned_be32(bulk_reg);
if (tmp < 0)
tmp = 0;
boot_charge_mah = ADC_TO_CHARGE_UAH(tmp,
charger->res_div) / 1000;
/*
* Check if the columb counter has been off for more than 30
* minutes as it tends to drift downward. If so, re-init soc
* with the boot voltage instead. Note the unit values for the
* OFF_CNT register appear to be in decaminutes and stops
* counting at 2550 (0xFF) minutes. BSP kernel used OCV, but
* for me occasionally that would show invalid values. Boot
* voltage is only accurate for me on first poweron (not
* reboots), but we shouldn't ever encounter an OFF_CNT more
* than 0 on a reboot anyway.
*/
regmap_read(rk808->regmap, RK817_GAS_GAUGE_OFF_CNT, &off_time);
if (off_time >= 3) {
regmap_bulk_read(rk808->regmap,
RK817_GAS_GAUGE_PWRON_VOL_H,
bulk_reg, 2);
tmp = get_unaligned_be16(bulk_reg);
boot_voltage = (charger->voltage_k * tmp) +
1000 * charger->voltage_b;
charger->soc =
power_supply_batinfo_ocv2cap(bat_info,
boot_voltage,
20) * 1000;
} else {
charger->soc = (boot_charge_mah * 1000 * 100 /
charger->fcc_mah);
}
}
/*
* Now we have our full charge capacity and soc, init the columb
* counter.
*/
boot_charge_mah = charger->soc * charger->fcc_mah / 100 / 1000;
if (boot_charge_mah > charger->fcc_mah)
boot_charge_mah = charger->fcc_mah;
tmp = CHARGE_TO_ADC(boot_charge_mah, charger->res_div);
put_unaligned_be32(tmp, bulk_reg);
ret = regmap_bulk_write(rk808->regmap, RK817_GAS_GAUGE_Q_INIT_H3,
bulk_reg, 4);
if (ret < 0)
return ret;
/* Set QMAX value to max design capacity. */
tmp = CHARGE_TO_ADC((charger->bat_charge_full_design_uah / 1000),
charger->res_div);
put_unaligned_be32(tmp, bulk_reg);
ret = regmap_bulk_write(rk808->regmap, RK817_GAS_GAUGE_Q_MAX_H3,
bulk_reg, 4);
if (ret < 0)
return ret;
return 0;
}
static int rk817_battery_init(struct rk817_charger *charger,
struct power_supply_battery_info *bat_info)
{
struct rk808 *rk808 = charger->rk808;
u32 tmp, max_chg_vol_mv, max_chg_cur_ma;
u8 max_chg_vol_reg, chg_term_i_reg;
int ret, chg_term_ma, max_chg_cur_reg;
u8 bulk_reg[2];
/* Get initial plug state */
regmap_read(rk808->regmap, RK817_SYS_STS, &tmp);
charger->plugged_in = (tmp & RK817_PLUG_IN_STS);
/*
* Turn on all ADC functions to measure battery, USB, and sys voltage,
* as well as batt temp. Note only tested implementation so far does
* not use a battery with a thermistor.
*/
regmap_write(rk808->regmap, RK817_GAS_GAUGE_ADC_CONFIG0, 0xfc);
/*
* Set relax mode voltage sampling interval and ADC offset calibration
* interval to 8 minutes to mirror BSP kernel. Set voltage and current
* modes to average to mirror BSP kernel.
*/
regmap_write(rk808->regmap, RK817_GAS_GAUGE_GG_CON, 0x04);
/* Calibrate voltage like the BSP does here. */
rk817_bat_calib_vol(charger);
/* Write relax threshold, derived from sleep enter current. */
tmp = CURRENT_TO_ADC(charger->sleep_enter_current_ua,
charger->res_div);
put_unaligned_be16(tmp, bulk_reg);
regmap_bulk_write(rk808->regmap, RK817_GAS_GAUGE_RELAX_THRE_H,
bulk_reg, 2);
/* Write sleep sample current, derived from sleep filter current. */
tmp = CURRENT_TO_ADC(charger->sleep_filter_current_ua,
charger->res_div);
put_unaligned_be16(tmp, bulk_reg);
regmap_bulk_write(rk808->regmap, RK817_GAS_GAUGE_SLEEP_CON_SAMP_CUR_H,
bulk_reg, 2);
/* Restart battery relax voltage */
regmap_write_bits(rk808->regmap, RK817_GAS_GAUGE_GG_STS,
RK817_RELAX_VOL_UPD, (0x0 << 2));
/*
* Set OCV Threshold Voltage to 127.5mV. This was hard coded like this
* in the BSP.
*/
regmap_write(rk808->regmap, RK817_GAS_GAUGE_OCV_THRE_VOL, 0xff);
/*
* Set maximum charging voltage to battery max voltage. Trying to be
* incredibly safe with these value, as setting them wrong could
* overcharge the battery, which would be very bad.
*/
max_chg_vol_mv = bat_info->constant_charge_voltage_max_uv / 1000;
max_chg_cur_ma = bat_info->constant_charge_current_max_ua / 1000;
if (max_chg_vol_mv < 4100) {
return dev_err_probe(charger->dev, -EINVAL,
"invalid max charger voltage, value %u unsupported\n",
max_chg_vol_mv * 1000);
}
if (max_chg_vol_mv > 4450) {
dev_info(charger->dev,
"Setting max charge voltage to 4450000uv\n");
max_chg_vol_mv = 4450;
}
if (max_chg_cur_ma < 500) {
return dev_err_probe(charger->dev, -EINVAL,
"invalid max charger current, value %u unsupported\n",
max_chg_cur_ma * 1000);
}
if (max_chg_cur_ma > 3500)
dev_info(charger->dev,
"Setting max charge current to 3500000ua\n");
/*
* Now that the values are sanity checked, if we subtract 4100 from the
* max voltage and divide by 50, we conviently get the exact value for
* the registers, which are 4.1v, 4.15v, 4.2v, 4.25v, 4.3v, 4.35v,
* 4.4v, and 4.45v; these correspond to values 0x00 through 0x07.
*/
max_chg_vol_reg = (max_chg_vol_mv - 4100) / 50;
max_chg_cur_reg = rk817_chg_cur_to_reg(max_chg_cur_ma);
if (max_chg_vol_reg < 0 || max_chg_vol_reg > 7) {
return dev_err_probe(charger->dev, -EINVAL,
"invalid max charger voltage, value %u unsupported\n",
max_chg_vol_mv * 1000);
}
if (max_chg_cur_reg < 0 || max_chg_cur_reg > 7) {
return dev_err_probe(charger->dev, -EINVAL,
"invalid max charger current, value %u unsupported\n",
max_chg_cur_ma * 1000);
}
/*
* Write the values to the registers, and deliver an emergency warning
* in the event they are not written correctly.
*/
ret = regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_OUT,
RK817_CHRG_VOL_SEL, (max_chg_vol_reg << 4));
if (ret) {
dev_emerg(charger->dev,
"Danger, unable to set max charger voltage: %u\n",
ret);
}
ret = regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_OUT,
RK817_CHRG_CUR_SEL, max_chg_cur_reg);
if (ret) {
dev_emerg(charger->dev,
"Danger, unable to set max charger current: %u\n",
ret);
}
/* Set charge finishing mode to analog */
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_TERM,
RK817_CHRG_TERM_ANA_DIG, (0x0 << 2));
/*
* Set charge finish current, warn if value not in range and keep
* default.
*/
chg_term_ma = bat_info->charge_term_current_ua / 1000;
if (chg_term_ma < 150 || chg_term_ma > 400) {
dev_warn(charger->dev,
"Invalid charge termination %u, keeping default\n",
chg_term_ma * 1000);
chg_term_ma = 200;
}
/*
* Values of 150ma, 200ma, 300ma, and 400ma correspond to 00, 01, 10,
* and 11.
*/
chg_term_i_reg = (chg_term_ma - 100) / 100;
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_TERM,
RK817_CHRG_TERM_ANA_SEL, chg_term_i_reg);
ret = rk817_read_or_set_full_charge_on_boot(charger, bat_info);
if (ret < 0)
return ret;
/*
* Set minimum USB input voltage to 4.5v and enable USB voltage input
* limit.
*/
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN,
RK817_USB_VLIM_SEL, (0x05 << 4));
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN, RK817_USB_VLIM_EN,
(0x01 << 7));
/*
* Set average USB input current limit to 1.5A and enable USB current
* input limit.
*/
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN,
RK817_USB_ILIM_SEL, 0x03);
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN, RK817_USB_ILIM_EN,
(0x01 << 3));
return 0;
}
static void rk817_charging_monitor(struct work_struct *work)
{
struct rk817_charger *charger;
charger = container_of(work, struct rk817_charger, work.work);
rk817_read_props(charger);
/* Run every 8 seconds like the BSP driver did. */
queue_delayed_work(system_wq, &charger->work, msecs_to_jiffies(8000));
}
static int rk817_charger_probe(struct platform_device *pdev)
{
struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
struct rk817_charger *charger;
struct device_node *node;
struct power_supply_battery_info *bat_info;
struct device *dev = &pdev->dev;
struct power_supply_config pscfg = {};
int plugin_irq, plugout_irq;
int of_value;
int ret;
node = of_get_child_by_name(dev->parent->of_node, "charger");
if (!node)
return -ENODEV;
charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
if (!charger) {
of_node_put(node);
return -ENOMEM;
}
charger->rk808 = rk808;
charger->dev = &pdev->dev;
platform_set_drvdata(pdev, charger);
rk817_bat_calib_vol(charger);
pscfg.drv_data = charger;
pscfg.of_node = node;
/*
* Get sample resistor value. Note only values of 10000 or 20000
* microohms are allowed. Schematic for my test implementation (an
* Odroid Go Advance) shows a 10 milliohm resistor for reference.
*/
ret = of_property_read_u32(node, "rockchip,resistor-sense-micro-ohms",
&of_value);
if (ret < 0) {
return dev_err_probe(dev, ret,
"Error reading sample resistor value\n");
}
/*
* Store as a 1 or a 2, since all we really use the value for is as a
* divisor in some calculations.
*/
charger->res_div = (of_value == 20000) ? 2 : 1;
/*
* Get sleep enter current value. Not sure what this value is for
* other than to help calibrate the relax threshold.
*/
ret = of_property_read_u32(node,
"rockchip,sleep-enter-current-microamp",
&of_value);
if (ret < 0) {
return dev_err_probe(dev, ret,
"Error reading sleep enter cur value\n");
}
charger->sleep_enter_current_ua = of_value;
/* Get sleep filter current value */
ret = of_property_read_u32(node,
"rockchip,sleep-filter-current-microamp",
&of_value);
if (ret < 0) {
return dev_err_probe(dev, ret,
"Error reading sleep filter cur value\n");
}
charger->sleep_filter_current_ua = of_value;
charger->bat_ps = devm_power_supply_register(&pdev->dev,
&rk817_bat_desc, &pscfg);
if (IS_ERR(charger->bat_ps))
return dev_err_probe(dev, -EINVAL,
"Battery failed to probe\n");
charger->chg_ps = devm_power_supply_register(&pdev->dev,
&rk817_chg_desc, &pscfg);
if (IS_ERR(charger->chg_ps))
return dev_err_probe(dev, -EINVAL,
"Charger failed to probe\n");
ret = power_supply_get_battery_info(charger->bat_ps,
&bat_info);
if (ret) {
return dev_err_probe(dev, ret,
"Unable to get battery info\n");
}
if ((bat_info->charge_full_design_uah <= 0) ||
(bat_info->voltage_min_design_uv <= 0) ||
(bat_info->voltage_max_design_uv <= 0) ||
(bat_info->constant_charge_voltage_max_uv <= 0) ||
(bat_info->constant_charge_current_max_ua <= 0) ||
(bat_info->charge_term_current_ua <= 0)) {
return dev_err_probe(dev, -EINVAL,
"Required bat info missing or invalid\n");
}
charger->bat_charge_full_design_uah = bat_info->charge_full_design_uah;
charger->bat_voltage_min_design_uv = bat_info->voltage_min_design_uv;
charger->bat_voltage_max_design_uv = bat_info->voltage_max_design_uv;
/*
* Has to run after power_supply_get_battery_info as it depends on some
* values discovered from that routine.
*/
ret = rk817_battery_init(charger, bat_info);
if (ret)
return ret;
power_supply_put_battery_info(charger->bat_ps, bat_info);
plugin_irq = platform_get_irq(pdev, 0);
if (plugin_irq < 0)
return plugin_irq;
plugout_irq = platform_get_irq(pdev, 1);
if (plugout_irq < 0)
return plugout_irq;
ret = devm_request_threaded_irq(charger->dev, plugin_irq, NULL,
rk817_plug_in_isr,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
"rk817_plug_in", charger);
if (ret) {
return dev_err_probe(&pdev->dev, ret,
"plug_in_irq request failed!\n");
}
ret = devm_request_threaded_irq(charger->dev, plugout_irq, NULL,
rk817_plug_out_isr,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
"rk817_plug_out", charger);
if (ret) {
return dev_err_probe(&pdev->dev, ret,
"plug_out_irq request failed!\n");
}
ret = devm_delayed_work_autocancel(&pdev->dev, &charger->work,
rk817_charging_monitor);
if (ret)
return ret;
/* Force the first update immediately. */
mod_delayed_work(system_wq, &charger->work, 0);
return 0;
}
static struct platform_driver rk817_charger_driver = {
.probe = rk817_charger_probe,
.driver = {
.name = "rk817-charger",
},
};
module_platform_driver(rk817_charger_driver);
MODULE_DESCRIPTION("Battery power supply driver for RK817 PMIC");
MODULE_AUTHOR("Maya Matuszczyk <[email protected]>");
MODULE_AUTHOR("Chris Morgan <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/rk817_charger.c |
// SPDX-License-Identifier: GPL-2.0
#include <linux/export.h>
#include <linux/power_supply.h>
#include <linux/of.h>
#include "ab8500-bm.h"
/* Default: under this temperature, charging is stopped */
#define AB8500_TEMP_UNDER 3
/* Default: between this temp and AB8500_TEMP_UNDER charging is reduced */
#define AB8500_TEMP_LOW 8
/* Default: between this temp and AB8500_TEMP_OVER charging is reduced */
#define AB8500_TEMP_HIGH 43
/* Default: over this temp, charging is stopped */
#define AB8500_TEMP_OVER 48
/* Default: temperature hysteresis */
#define AB8500_TEMP_HYSTERESIS 3
static struct power_supply_battery_ocv_table ocv_cap_tbl[] = {
{ .ocv = 4186000, .capacity = 100},
{ .ocv = 4163000, .capacity = 99},
{ .ocv = 4114000, .capacity = 95},
{ .ocv = 4068000, .capacity = 90},
{ .ocv = 3990000, .capacity = 80},
{ .ocv = 3926000, .capacity = 70},
{ .ocv = 3898000, .capacity = 65},
{ .ocv = 3866000, .capacity = 60},
{ .ocv = 3833000, .capacity = 55},
{ .ocv = 3812000, .capacity = 50},
{ .ocv = 3787000, .capacity = 40},
{ .ocv = 3768000, .capacity = 30},
{ .ocv = 3747000, .capacity = 25},
{ .ocv = 3730000, .capacity = 20},
{ .ocv = 3705000, .capacity = 15},
{ .ocv = 3699000, .capacity = 14},
{ .ocv = 3684000, .capacity = 12},
{ .ocv = 3672000, .capacity = 9},
{ .ocv = 3657000, .capacity = 7},
{ .ocv = 3638000, .capacity = 6},
{ .ocv = 3556000, .capacity = 4},
{ .ocv = 3424000, .capacity = 2},
{ .ocv = 3317000, .capacity = 1},
{ .ocv = 3094000, .capacity = 0},
};
/*
* Note that the batres_vs_temp table must be strictly sorted by falling
* temperature values to work. Factory resistance is 300 mOhm and the
* resistance values to the right are percentages of 300 mOhm.
*/
static struct power_supply_resistance_temp_table temp_to_batres_tbl_thermistor[] = {
{ .temp = 40, .resistance = 40 /* 120 mOhm */ },
{ .temp = 30, .resistance = 45 /* 135 mOhm */ },
{ .temp = 20, .resistance = 55 /* 165 mOhm */ },
{ .temp = 10, .resistance = 77 /* 230 mOhm */ },
{ .temp = 00, .resistance = 108 /* 325 mOhm */ },
{ .temp = -10, .resistance = 158 /* 445 mOhm */ },
{ .temp = -20, .resistance = 198 /* 595 mOhm */ },
};
static struct power_supply_maintenance_charge_table ab8500_maint_charg_table[] = {
{
/* Maintenance charging phase A, 60 hours */
.charge_current_max_ua = 400000,
.charge_voltage_max_uv = 4050000,
.charge_safety_timer_minutes = 60*60,
},
{
/* Maintenance charging phase B, 200 hours */
.charge_current_max_ua = 400000,
.charge_voltage_max_uv = 4000000,
.charge_safety_timer_minutes = 200*60,
}
};
static const struct ab8500_bm_capacity_levels cap_levels = {
.critical = 2,
.low = 10,
.normal = 70,
.high = 95,
.full = 100,
};
static const struct ab8500_fg_parameters fg = {
.recovery_sleep_timer = 10,
.recovery_total_time = 100,
.init_timer = 1,
.init_discard_time = 5,
.init_total_time = 40,
.high_curr_time = 60,
.accu_charging = 30,
.accu_high_curr = 30,
.high_curr_threshold_ua = 50000,
.lowbat_threshold_uv = 3100000,
.battok_falling_th_sel0 = 2860,
.battok_raising_th_sel1 = 2860,
.maint_thres = 95,
.user_cap_limit = 15,
.pcut_enable = 1,
.pcut_max_time = 127,
.pcut_flag_time = 112,
.pcut_max_restart = 15,
.pcut_debounce_time = 2,
};
static const struct ab8500_maxim_parameters ab8500_maxi_params = {
.ena_maxi = true,
.chg_curr_ua = 910000,
.wait_cycles = 10,
.charger_curr_step_ua = 100000,
};
static const struct ab8500_bm_charger_parameters chg = {
.usb_volt_max_uv = 5500000,
.usb_curr_max_ua = 1500000,
.ac_volt_max_uv = 7500000,
.ac_curr_max_ua = 1500000,
};
/* This is referenced directly in the charger code */
struct ab8500_bm_data ab8500_bm_data = {
.main_safety_tmr_h = 4,
.temp_interval_chg = 20,
.temp_interval_nochg = 120,
.usb_safety_tmr_h = 4,
.bkup_bat_v = BUP_VCH_SEL_2P6V,
.bkup_bat_i = BUP_ICH_SEL_150UA,
.capacity_scaling = false,
.chg_unknown_bat = false,
.enable_overshoot = false,
.fg_res = 100,
.cap_levels = &cap_levels,
.interval_charging = 5,
.interval_not_charging = 120,
.maxi = &ab8500_maxi_params,
.chg_params = &chg,
.fg_params = &fg,
};
int ab8500_bm_of_probe(struct power_supply *psy,
struct ab8500_bm_data *bm)
{
struct power_supply_battery_info *bi;
struct device *dev = &psy->dev;
int ret;
ret = power_supply_get_battery_info(psy, &bm->bi);
if (ret) {
dev_err(dev, "cannot retrieve battery info\n");
return ret;
}
bi = bm->bi;
/* Fill in defaults for any data missing from the device tree */
if (bi->charge_full_design_uah < 0)
/* The default capacity is 612 mAh for unknown batteries */
bi->charge_full_design_uah = 612000;
/*
* All of these voltages need to be specified or we will simply
* fall back to safe defaults.
*/
if ((bi->voltage_min_design_uv < 0) ||
(bi->voltage_max_design_uv < 0)) {
/* Nominal voltage is 3.7V for unknown batteries */
bi->voltage_min_design_uv = 3700000;
/* Termination voltage 4.05V */
bi->voltage_max_design_uv = 4050000;
}
if (bi->constant_charge_current_max_ua < 0)
bi->constant_charge_current_max_ua = 400000;
if (bi->constant_charge_voltage_max_uv < 0)
bi->constant_charge_voltage_max_uv = 4100000;
if (bi->charge_term_current_ua)
/* Charging stops when we drop below this current */
bi->charge_term_current_ua = 200000;
if (!bi->maintenance_charge || !bi->maintenance_charge_size) {
bi->maintenance_charge = ab8500_maint_charg_table;
bi->maintenance_charge_size = ARRAY_SIZE(ab8500_maint_charg_table);
}
if (bi->alert_low_temp_charge_current_ua < 0 ||
bi->alert_low_temp_charge_voltage_uv < 0)
{
bi->alert_low_temp_charge_current_ua = 300000;
bi->alert_low_temp_charge_voltage_uv = 4000000;
}
if (bi->alert_high_temp_charge_current_ua < 0 ||
bi->alert_high_temp_charge_voltage_uv < 0)
{
bi->alert_high_temp_charge_current_ua = 300000;
bi->alert_high_temp_charge_voltage_uv = 4000000;
}
/*
* Internal resistance and factory resistance are tightly coupled
* so both MUST be defined or we fall back to defaults.
*/
if ((bi->factory_internal_resistance_uohm < 0) ||
!bi->resist_table) {
bi->factory_internal_resistance_uohm = 300000;
bi->resist_table = temp_to_batres_tbl_thermistor;
bi->resist_table_size = ARRAY_SIZE(temp_to_batres_tbl_thermistor);
}
/* The default battery is emulated by a resistor at 7K */
if (bi->bti_resistance_ohm < 0 ||
bi->bti_resistance_tolerance < 0) {
bi->bti_resistance_ohm = 7000;
bi->bti_resistance_tolerance = 20;
}
if (!bi->ocv_table[0]) {
/* Default capacity table at say 25 degrees Celsius */
bi->ocv_temp[0] = 25;
bi->ocv_table[0] = ocv_cap_tbl;
bi->ocv_table_size[0] = ARRAY_SIZE(ocv_cap_tbl);
}
if (bi->temp_min == INT_MIN)
bi->temp_min = AB8500_TEMP_UNDER;
if (bi->temp_max == INT_MAX)
bi->temp_max = AB8500_TEMP_OVER;
if (bi->temp_alert_min == INT_MIN)
bi->temp_alert_min = AB8500_TEMP_LOW;
if (bi->temp_alert_max == INT_MAX)
bi->temp_alert_max = AB8500_TEMP_HIGH;
bm->temp_hysteresis = AB8500_TEMP_HYSTERESIS;
return 0;
}
void ab8500_bm_of_remove(struct power_supply *psy,
struct ab8500_bm_data *bm)
{
power_supply_put_battery_info(psy, bm->bi);
}
| linux-master | drivers/power/supply/ab8500_bmdata.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* ADP5061 I2C Programmable Linear Battery Charger
*
* Copyright 2018 Analog Devices Inc.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/mod_devicetable.h>
#include <linux/power_supply.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/regmap.h>
/* ADP5061 registers definition */
#define ADP5061_ID 0x00
#define ADP5061_REV 0x01
#define ADP5061_VINX_SET 0x02
#define ADP5061_TERM_SET 0x03
#define ADP5061_CHG_CURR 0x04
#define ADP5061_VOLTAGE_TH 0x05
#define ADP5061_TIMER_SET 0x06
#define ADP5061_FUNC_SET_1 0x07
#define ADP5061_FUNC_SET_2 0x08
#define ADP5061_INT_EN 0x09
#define ADP5061_INT_ACT 0x0A
#define ADP5061_CHG_STATUS_1 0x0B
#define ADP5061_CHG_STATUS_2 0x0C
#define ADP5061_FAULT 0x0D
#define ADP5061_BATTERY_SHORT 0x10
#define ADP5061_IEND 0x11
/* ADP5061_VINX_SET */
#define ADP5061_VINX_SET_ILIM_MSK GENMASK(3, 0)
#define ADP5061_VINX_SET_ILIM_MODE(x) (((x) & 0x0F) << 0)
/* ADP5061_TERM_SET */
#define ADP5061_TERM_SET_VTRM_MSK GENMASK(7, 2)
#define ADP5061_TERM_SET_VTRM_MODE(x) (((x) & 0x3F) << 2)
#define ADP5061_TERM_SET_CHG_VLIM_MSK GENMASK(1, 0)
#define ADP5061_TERM_SET_CHG_VLIM_MODE(x) (((x) & 0x03) << 0)
/* ADP5061_CHG_CURR */
#define ADP5061_CHG_CURR_ICHG_MSK GENMASK(6, 2)
#define ADP5061_CHG_CURR_ICHG_MODE(x) (((x) & 0x1F) << 2)
#define ADP5061_CHG_CURR_ITRK_DEAD_MSK GENMASK(1, 0)
#define ADP5061_CHG_CURR_ITRK_DEAD_MODE(x) (((x) & 0x03) << 0)
/* ADP5061_VOLTAGE_TH */
#define ADP5061_VOLTAGE_TH_DIS_RCH_MSK BIT(7)
#define ADP5061_VOLTAGE_TH_DIS_RCH_MODE(x) (((x) & 0x01) << 7)
#define ADP5061_VOLTAGE_TH_VRCH_MSK GENMASK(6, 5)
#define ADP5061_VOLTAGE_TH_VRCH_MODE(x) (((x) & 0x03) << 5)
#define ADP5061_VOLTAGE_TH_VTRK_DEAD_MSK GENMASK(4, 3)
#define ADP5061_VOLTAGE_TH_VTRK_DEAD_MODE(x) (((x) & 0x03) << 3)
#define ADP5061_VOLTAGE_TH_VWEAK_MSK GENMASK(2, 0)
#define ADP5061_VOLTAGE_TH_VWEAK_MODE(x) (((x) & 0x07) << 0)
/* ADP5061_CHG_STATUS_1 */
#define ADP5061_CHG_STATUS_1_VIN_OV(x) (((x) >> 7) & 0x1)
#define ADP5061_CHG_STATUS_1_VIN_OK(x) (((x) >> 6) & 0x1)
#define ADP5061_CHG_STATUS_1_VIN_ILIM(x) (((x) >> 5) & 0x1)
#define ADP5061_CHG_STATUS_1_THERM_LIM(x) (((x) >> 4) & 0x1)
#define ADP5061_CHG_STATUS_1_CHDONE(x) (((x) >> 3) & 0x1)
#define ADP5061_CHG_STATUS_1_CHG_STATUS(x) (((x) >> 0) & 0x7)
/* ADP5061_CHG_STATUS_2 */
#define ADP5061_CHG_STATUS_2_THR_STATUS(x) (((x) >> 5) & 0x7)
#define ADP5061_CHG_STATUS_2_RCH_LIM_INFO(x) (((x) >> 3) & 0x1)
#define ADP5061_CHG_STATUS_2_BAT_STATUS(x) (((x) >> 0) & 0x7)
/* ADP5061_IEND */
#define ADP5061_IEND_IEND_MSK GENMASK(7, 5)
#define ADP5061_IEND_IEND_MODE(x) (((x) & 0x07) << 5)
#define ADP5061_NO_BATTERY 0x01
#define ADP5061_ICHG_MAX 1300 // mA
enum adp5061_chg_status {
ADP5061_CHG_OFF,
ADP5061_CHG_TRICKLE,
ADP5061_CHG_FAST_CC,
ADP5061_CHG_FAST_CV,
ADP5061_CHG_COMPLETE,
ADP5061_CHG_LDO_MODE,
ADP5061_CHG_TIMER_EXP,
ADP5061_CHG_BAT_DET,
};
static const int adp5061_chg_type[4] = {
[ADP5061_CHG_OFF] = POWER_SUPPLY_CHARGE_TYPE_NONE,
[ADP5061_CHG_TRICKLE] = POWER_SUPPLY_CHARGE_TYPE_TRICKLE,
[ADP5061_CHG_FAST_CC] = POWER_SUPPLY_CHARGE_TYPE_FAST,
[ADP5061_CHG_FAST_CV] = POWER_SUPPLY_CHARGE_TYPE_FAST,
};
static const int adp5061_vweak_th[8] = {
2700, 2800, 2900, 3000, 3100, 3200, 3300, 3400,
};
static const int adp5061_prechg_current[4] = {
5, 10, 20, 80,
};
static const int adp5061_vmin[4] = {
2000, 2500, 2600, 2900,
};
static const int adp5061_const_chg_vmax[4] = {
3200, 3400, 3700, 3800,
};
static const int adp5061_const_ichg[24] = {
50, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650,
700, 750, 800, 850, 900, 950, 1000, 1050, 1100, 1200, 1300,
};
static const int adp5061_vmax[36] = {
3800, 3820, 3840, 3860, 3880, 3900, 3920, 3940, 3960, 3980,
4000, 4020, 4040, 4060, 4080, 4100, 4120, 4140, 4160, 4180,
4200, 4220, 4240, 4260, 4280, 4300, 4320, 4340, 4360, 4380,
4400, 4420, 4440, 4460, 4480, 4500,
};
static const int adp5061_in_current_lim[16] = {
100, 150, 200, 250, 300, 400, 500, 600, 700,
800, 900, 1000, 1200, 1500, 1800, 2100,
};
static const int adp5061_iend[8] = {
12500, 32500, 52500, 72500, 92500, 117500, 142500, 170000,
};
struct adp5061_state {
struct i2c_client *client;
struct regmap *regmap;
struct power_supply *psy;
};
static int adp5061_get_array_index(const int *array, u8 size, int val)
{
int i;
for (i = 1; i < size; i++) {
if (val < array[i])
break;
}
return i-1;
}
static int adp5061_get_status(struct adp5061_state *st,
u8 *status1, u8 *status2)
{
u8 buf[2];
int ret;
/* CHG_STATUS1 and CHG_STATUS2 are adjacent regs */
ret = regmap_bulk_read(st->regmap, ADP5061_CHG_STATUS_1,
&buf[0], 2);
if (ret < 0)
return ret;
*status1 = buf[0];
*status2 = buf[1];
return ret;
}
static int adp5061_get_input_current_limit(struct adp5061_state *st,
union power_supply_propval *val)
{
unsigned int regval;
int mode, ret;
ret = regmap_read(st->regmap, ADP5061_VINX_SET, ®val);
if (ret < 0)
return ret;
mode = ADP5061_VINX_SET_ILIM_MODE(regval);
val->intval = adp5061_in_current_lim[mode] * 1000;
return ret;
}
static int adp5061_set_input_current_limit(struct adp5061_state *st, int val)
{
int index;
/* Convert from uA to mA */
val /= 1000;
index = adp5061_get_array_index(adp5061_in_current_lim,
ARRAY_SIZE(adp5061_in_current_lim),
val);
if (index < 0)
return index;
return regmap_update_bits(st->regmap, ADP5061_VINX_SET,
ADP5061_VINX_SET_ILIM_MSK,
ADP5061_VINX_SET_ILIM_MODE(index));
}
static int adp5061_set_min_voltage(struct adp5061_state *st, int val)
{
int index;
/* Convert from uV to mV */
val /= 1000;
index = adp5061_get_array_index(adp5061_vmin,
ARRAY_SIZE(adp5061_vmin),
val);
if (index < 0)
return index;
return regmap_update_bits(st->regmap, ADP5061_VOLTAGE_TH,
ADP5061_VOLTAGE_TH_VTRK_DEAD_MSK,
ADP5061_VOLTAGE_TH_VTRK_DEAD_MODE(index));
}
static int adp5061_get_min_voltage(struct adp5061_state *st,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(st->regmap, ADP5061_VOLTAGE_TH, ®val);
if (ret < 0)
return ret;
regval = ((regval & ADP5061_VOLTAGE_TH_VTRK_DEAD_MSK) >> 3);
val->intval = adp5061_vmin[regval] * 1000;
return ret;
}
static int adp5061_get_chg_volt_lim(struct adp5061_state *st,
union power_supply_propval *val)
{
unsigned int regval;
int mode, ret;
ret = regmap_read(st->regmap, ADP5061_TERM_SET, ®val);
if (ret < 0)
return ret;
mode = ADP5061_TERM_SET_CHG_VLIM_MODE(regval);
val->intval = adp5061_const_chg_vmax[mode] * 1000;
return ret;
}
static int adp5061_get_max_voltage(struct adp5061_state *st,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(st->regmap, ADP5061_TERM_SET, ®val);
if (ret < 0)
return ret;
regval = ((regval & ADP5061_TERM_SET_VTRM_MSK) >> 2) - 0x0F;
if (regval >= ARRAY_SIZE(adp5061_vmax))
regval = ARRAY_SIZE(adp5061_vmax) - 1;
val->intval = adp5061_vmax[regval] * 1000;
return ret;
}
static int adp5061_set_max_voltage(struct adp5061_state *st, int val)
{
int vmax_index;
/* Convert from uV to mV */
val /= 1000;
if (val > 4500)
val = 4500;
vmax_index = adp5061_get_array_index(adp5061_vmax,
ARRAY_SIZE(adp5061_vmax), val);
if (vmax_index < 0)
return vmax_index;
vmax_index += 0x0F;
return regmap_update_bits(st->regmap, ADP5061_TERM_SET,
ADP5061_TERM_SET_VTRM_MSK,
ADP5061_TERM_SET_VTRM_MODE(vmax_index));
}
static int adp5061_set_const_chg_vmax(struct adp5061_state *st, int val)
{
int index;
/* Convert from uV to mV */
val /= 1000;
index = adp5061_get_array_index(adp5061_const_chg_vmax,
ARRAY_SIZE(adp5061_const_chg_vmax),
val);
if (index < 0)
return index;
return regmap_update_bits(st->regmap, ADP5061_TERM_SET,
ADP5061_TERM_SET_CHG_VLIM_MSK,
ADP5061_TERM_SET_CHG_VLIM_MODE(index));
}
static int adp5061_set_const_chg_current(struct adp5061_state *st, int val)
{
int index;
/* Convert from uA to mA */
val /= 1000;
if (val > ADP5061_ICHG_MAX)
val = ADP5061_ICHG_MAX;
index = adp5061_get_array_index(adp5061_const_ichg,
ARRAY_SIZE(adp5061_const_ichg),
val);
if (index < 0)
return index;
return regmap_update_bits(st->regmap, ADP5061_CHG_CURR,
ADP5061_CHG_CURR_ICHG_MSK,
ADP5061_CHG_CURR_ICHG_MODE(index));
}
static int adp5061_get_const_chg_current(struct adp5061_state *st,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(st->regmap, ADP5061_CHG_CURR, ®val);
if (ret < 0)
return ret;
regval = ((regval & ADP5061_CHG_CURR_ICHG_MSK) >> 2);
if (regval >= ARRAY_SIZE(adp5061_const_ichg))
regval = ARRAY_SIZE(adp5061_const_ichg) - 1;
val->intval = adp5061_const_ichg[regval] * 1000;
return ret;
}
static int adp5061_get_prechg_current(struct adp5061_state *st,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(st->regmap, ADP5061_CHG_CURR, ®val);
if (ret < 0)
return ret;
regval &= ADP5061_CHG_CURR_ITRK_DEAD_MSK;
val->intval = adp5061_prechg_current[regval] * 1000;
return ret;
}
static int adp5061_set_prechg_current(struct adp5061_state *st, int val)
{
int index;
/* Convert from uA to mA */
val /= 1000;
index = adp5061_get_array_index(adp5061_prechg_current,
ARRAY_SIZE(adp5061_prechg_current),
val);
if (index < 0)
return index;
return regmap_update_bits(st->regmap, ADP5061_CHG_CURR,
ADP5061_CHG_CURR_ITRK_DEAD_MSK,
ADP5061_CHG_CURR_ITRK_DEAD_MODE(index));
}
static int adp5061_get_vweak_th(struct adp5061_state *st,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(st->regmap, ADP5061_VOLTAGE_TH, ®val);
if (ret < 0)
return ret;
regval &= ADP5061_VOLTAGE_TH_VWEAK_MSK;
val->intval = adp5061_vweak_th[regval] * 1000;
return ret;
}
static int adp5061_set_vweak_th(struct adp5061_state *st, int val)
{
int index;
/* Convert from uV to mV */
val /= 1000;
index = adp5061_get_array_index(adp5061_vweak_th,
ARRAY_SIZE(adp5061_vweak_th),
val);
if (index < 0)
return index;
return regmap_update_bits(st->regmap, ADP5061_VOLTAGE_TH,
ADP5061_VOLTAGE_TH_VWEAK_MSK,
ADP5061_VOLTAGE_TH_VWEAK_MODE(index));
}
static int adp5061_get_chg_type(struct adp5061_state *st,
union power_supply_propval *val)
{
u8 status1, status2;
int chg_type, ret;
ret = adp5061_get_status(st, &status1, &status2);
if (ret < 0)
return ret;
chg_type = ADP5061_CHG_STATUS_1_CHG_STATUS(status1);
if (chg_type >= ARRAY_SIZE(adp5061_chg_type))
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
else
val->intval = adp5061_chg_type[chg_type];
return ret;
}
static int adp5061_get_charger_status(struct adp5061_state *st,
union power_supply_propval *val)
{
u8 status1, status2;
int ret;
ret = adp5061_get_status(st, &status1, &status2);
if (ret < 0)
return ret;
switch (ADP5061_CHG_STATUS_1_CHG_STATUS(status1)) {
case ADP5061_CHG_OFF:
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case ADP5061_CHG_TRICKLE:
case ADP5061_CHG_FAST_CC:
case ADP5061_CHG_FAST_CV:
val->intval = POWER_SUPPLY_STATUS_CHARGING;
break;
case ADP5061_CHG_COMPLETE:
val->intval = POWER_SUPPLY_STATUS_FULL;
break;
case ADP5061_CHG_TIMER_EXP:
/* The battery must be discharging if there is a charge fault */
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
break;
default:
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
}
return ret;
}
static int adp5061_get_battery_status(struct adp5061_state *st,
union power_supply_propval *val)
{
u8 status1, status2;
int ret;
ret = adp5061_get_status(st, &status1, &status2);
if (ret < 0)
return ret;
switch (ADP5061_CHG_STATUS_2_BAT_STATUS(status2)) {
case 0x0: /* Battery monitor off */
case 0x1: /* No battery */
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
break;
case 0x2: /* VBAT < VTRK */
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
break;
case 0x3: /* VTRK < VBAT_SNS < VWEAK */
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
break;
case 0x4: /* VBAT_SNS > VWEAK */
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
break;
default:
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
break;
}
return ret;
}
static int adp5061_get_termination_current(struct adp5061_state *st,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(st->regmap, ADP5061_IEND, ®val);
if (ret < 0)
return ret;
regval = (regval & ADP5061_IEND_IEND_MSK) >> 5;
val->intval = adp5061_iend[regval];
return ret;
}
static int adp5061_set_termination_current(struct adp5061_state *st, int val)
{
int index;
index = adp5061_get_array_index(adp5061_iend,
ARRAY_SIZE(adp5061_iend),
val);
if (index < 0)
return index;
return regmap_update_bits(st->regmap, ADP5061_IEND,
ADP5061_IEND_IEND_MSK,
ADP5061_IEND_IEND_MODE(index));
}
static int adp5061_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct adp5061_state *st = power_supply_get_drvdata(psy);
u8 status1, status2;
int mode, ret;
switch (psp) {
case POWER_SUPPLY_PROP_PRESENT:
ret = adp5061_get_status(st, &status1, &status2);
if (ret < 0)
return ret;
mode = ADP5061_CHG_STATUS_2_BAT_STATUS(status2);
if (mode == ADP5061_NO_BATTERY)
val->intval = 0;
else
val->intval = 1;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
return adp5061_get_chg_type(st, val);
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
/* This property is used to indicate the input current
* limit into VINx (ILIM)
*/
return adp5061_get_input_current_limit(st, val);
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
/* This property is used to indicate the termination
* voltage (VTRM)
*/
return adp5061_get_max_voltage(st, val);
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
/*
* This property is used to indicate the trickle to fast
* charge threshold (VTRK_DEAD)
*/
return adp5061_get_min_voltage(st, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
/* This property is used to indicate the charging
* voltage limit (CHG_VLIM)
*/
return adp5061_get_chg_volt_lim(st, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
/*
* This property is used to indicate the value of the constant
* current charge (ICHG)
*/
return adp5061_get_const_chg_current(st, val);
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
/*
* This property is used to indicate the value of the trickle
* and weak charge currents (ITRK_DEAD)
*/
return adp5061_get_prechg_current(st, val);
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
/*
* This property is used to set the VWEAK threshold
* bellow this value, weak charge mode is entered
* above this value, fast chargerge mode is entered
*/
return adp5061_get_vweak_th(st, val);
case POWER_SUPPLY_PROP_STATUS:
/*
* Indicate the charger status in relation to power
* supply status property
*/
return adp5061_get_charger_status(st, val);
case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
/*
* Indicate the battery status in relation to power
* supply capacity level property
*/
return adp5061_get_battery_status(st, val);
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
/* Indicate the values of the termination current */
return adp5061_get_termination_current(st, val);
default:
return -EINVAL;
}
return 0;
}
static int adp5061_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct adp5061_state *st = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return adp5061_set_input_current_limit(st, val->intval);
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
return adp5061_set_max_voltage(st, val->intval);
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
return adp5061_set_min_voltage(st, val->intval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
return adp5061_set_const_chg_vmax(st, val->intval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
return adp5061_set_const_chg_current(st, val->intval);
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
return adp5061_set_prechg_current(st, val->intval);
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
return adp5061_set_vweak_th(st, val->intval);
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return adp5061_set_termination_current(st, val->intval);
default:
return -EINVAL;
}
return 0;
}
static int adp5061_prop_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return 1;
default:
return 0;
}
}
static enum power_supply_property adp5061_props[] = {
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_VOLTAGE_MAX,
POWER_SUPPLY_PROP_VOLTAGE_MIN,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
};
static const struct regmap_config adp5061_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static const struct power_supply_desc adp5061_desc = {
.name = "adp5061",
.type = POWER_SUPPLY_TYPE_USB,
.get_property = adp5061_get_property,
.set_property = adp5061_set_property,
.property_is_writeable = adp5061_prop_writeable,
.properties = adp5061_props,
.num_properties = ARRAY_SIZE(adp5061_props),
};
static int adp5061_probe(struct i2c_client *client)
{
struct power_supply_config psy_cfg = {};
struct adp5061_state *st;
st = devm_kzalloc(&client->dev, sizeof(*st), GFP_KERNEL);
if (!st)
return -ENOMEM;
st->client = client;
st->regmap = devm_regmap_init_i2c(client,
&adp5061_regmap_config);
if (IS_ERR(st->regmap)) {
dev_err(&client->dev, "Failed to initialize register map\n");
return -EINVAL;
}
i2c_set_clientdata(client, st);
psy_cfg.drv_data = st;
st->psy = devm_power_supply_register(&client->dev,
&adp5061_desc,
&psy_cfg);
if (IS_ERR(st->psy)) {
dev_err(&client->dev, "Failed to register power supply\n");
return PTR_ERR(st->psy);
}
return 0;
}
static const struct i2c_device_id adp5061_id[] = {
{ "adp5061", 0},
{ }
};
MODULE_DEVICE_TABLE(i2c, adp5061_id);
static struct i2c_driver adp5061_driver = {
.driver = {
.name = KBUILD_MODNAME,
},
.probe = adp5061_probe,
.id_table = adp5061_id,
};
module_i2c_driver(adp5061_driver);
MODULE_DESCRIPTION("Analog Devices adp5061 battery charger driver");
MODULE_AUTHOR("Stefan Popa <[email protected]>");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/power/supply/adp5061.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for Richtek RT9455WSC battery charger.
*
* Copyright (C) 2015 Intel Corporation
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/pm_runtime.h>
#include <linux/power_supply.h>
#include <linux/i2c.h>
#include <linux/acpi.h>
#include <linux/usb/phy.h>
#include <linux/regmap.h>
#define RT9455_MANUFACTURER "Richtek"
#define RT9455_MODEL_NAME "RT9455"
#define RT9455_DRIVER_NAME "rt9455-charger"
#define RT9455_IRQ_NAME "interrupt"
#define RT9455_PWR_RDY_DELAY 1 /* 1 second */
#define RT9455_MAX_CHARGING_TIME 21600 /* 6 hrs */
#define RT9455_BATT_PRESENCE_DELAY 60 /* 60 seconds */
#define RT9455_CHARGE_MODE 0x00
#define RT9455_BOOST_MODE 0x01
#define RT9455_FAULT 0x03
#define RT9455_IAICR_100MA 0x00
#define RT9455_IAICR_500MA 0x01
#define RT9455_IAICR_NO_LIMIT 0x03
#define RT9455_CHARGE_DISABLE 0x00
#define RT9455_CHARGE_ENABLE 0x01
#define RT9455_PWR_FAULT 0x00
#define RT9455_PWR_GOOD 0x01
#define RT9455_REG_CTRL1 0x00 /* CTRL1 reg address */
#define RT9455_REG_CTRL2 0x01 /* CTRL2 reg address */
#define RT9455_REG_CTRL3 0x02 /* CTRL3 reg address */
#define RT9455_REG_DEV_ID 0x03 /* DEV_ID reg address */
#define RT9455_REG_CTRL4 0x04 /* CTRL4 reg address */
#define RT9455_REG_CTRL5 0x05 /* CTRL5 reg address */
#define RT9455_REG_CTRL6 0x06 /* CTRL6 reg address */
#define RT9455_REG_CTRL7 0x07 /* CTRL7 reg address */
#define RT9455_REG_IRQ1 0x08 /* IRQ1 reg address */
#define RT9455_REG_IRQ2 0x09 /* IRQ2 reg address */
#define RT9455_REG_IRQ3 0x0A /* IRQ3 reg address */
#define RT9455_REG_MASK1 0x0B /* MASK1 reg address */
#define RT9455_REG_MASK2 0x0C /* MASK2 reg address */
#define RT9455_REG_MASK3 0x0D /* MASK3 reg address */
enum rt9455_fields {
F_STAT, F_BOOST, F_PWR_RDY, F_OTG_PIN_POLARITY, /* CTRL1 reg fields */
F_IAICR, F_TE_SHDN_EN, F_HIGHER_OCP, F_TE, F_IAICR_INT, F_HIZ,
F_OPA_MODE, /* CTRL2 reg fields */
F_VOREG, F_OTG_PL, F_OTG_EN, /* CTRL3 reg fields */
F_VENDOR_ID, F_CHIP_REV, /* DEV_ID reg fields */
F_RST, /* CTRL4 reg fields */
F_TMR_EN, F_MIVR, F_IPREC, F_IEOC_PERCENTAGE, /* CTRL5 reg fields*/
F_IAICR_SEL, F_ICHRG, F_VPREC, /* CTRL6 reg fields */
F_BATD_EN, F_CHG_EN, F_VMREG, /* CTRL7 reg fields */
F_TSDI, F_VINOVPI, F_BATAB, /* IRQ1 reg fields */
F_CHRVPI, F_CHBATOVI, F_CHTERMI, F_CHRCHGI, F_CH32MI, F_CHTREGI,
F_CHMIVRI, /* IRQ2 reg fields */
F_BSTBUSOVI, F_BSTOLI, F_BSTLOWVI, F_BST32SI, /* IRQ3 reg fields */
F_TSDM, F_VINOVPIM, F_BATABM, /* MASK1 reg fields */
F_CHRVPIM, F_CHBATOVIM, F_CHTERMIM, F_CHRCHGIM, F_CH32MIM, F_CHTREGIM,
F_CHMIVRIM, /* MASK2 reg fields */
F_BSTVINOVIM, F_BSTOLIM, F_BSTLOWVIM, F_BST32SIM, /* MASK3 reg fields */
F_MAX_FIELDS
};
static const struct reg_field rt9455_reg_fields[] = {
[F_STAT] = REG_FIELD(RT9455_REG_CTRL1, 4, 5),
[F_BOOST] = REG_FIELD(RT9455_REG_CTRL1, 3, 3),
[F_PWR_RDY] = REG_FIELD(RT9455_REG_CTRL1, 2, 2),
[F_OTG_PIN_POLARITY] = REG_FIELD(RT9455_REG_CTRL1, 1, 1),
[F_IAICR] = REG_FIELD(RT9455_REG_CTRL2, 6, 7),
[F_TE_SHDN_EN] = REG_FIELD(RT9455_REG_CTRL2, 5, 5),
[F_HIGHER_OCP] = REG_FIELD(RT9455_REG_CTRL2, 4, 4),
[F_TE] = REG_FIELD(RT9455_REG_CTRL2, 3, 3),
[F_IAICR_INT] = REG_FIELD(RT9455_REG_CTRL2, 2, 2),
[F_HIZ] = REG_FIELD(RT9455_REG_CTRL2, 1, 1),
[F_OPA_MODE] = REG_FIELD(RT9455_REG_CTRL2, 0, 0),
[F_VOREG] = REG_FIELD(RT9455_REG_CTRL3, 2, 7),
[F_OTG_PL] = REG_FIELD(RT9455_REG_CTRL3, 1, 1),
[F_OTG_EN] = REG_FIELD(RT9455_REG_CTRL3, 0, 0),
[F_VENDOR_ID] = REG_FIELD(RT9455_REG_DEV_ID, 4, 7),
[F_CHIP_REV] = REG_FIELD(RT9455_REG_DEV_ID, 0, 3),
[F_RST] = REG_FIELD(RT9455_REG_CTRL4, 7, 7),
[F_TMR_EN] = REG_FIELD(RT9455_REG_CTRL5, 7, 7),
[F_MIVR] = REG_FIELD(RT9455_REG_CTRL5, 4, 5),
[F_IPREC] = REG_FIELD(RT9455_REG_CTRL5, 2, 3),
[F_IEOC_PERCENTAGE] = REG_FIELD(RT9455_REG_CTRL5, 0, 1),
[F_IAICR_SEL] = REG_FIELD(RT9455_REG_CTRL6, 7, 7),
[F_ICHRG] = REG_FIELD(RT9455_REG_CTRL6, 4, 6),
[F_VPREC] = REG_FIELD(RT9455_REG_CTRL6, 0, 2),
[F_BATD_EN] = REG_FIELD(RT9455_REG_CTRL7, 6, 6),
[F_CHG_EN] = REG_FIELD(RT9455_REG_CTRL7, 4, 4),
[F_VMREG] = REG_FIELD(RT9455_REG_CTRL7, 0, 3),
[F_TSDI] = REG_FIELD(RT9455_REG_IRQ1, 7, 7),
[F_VINOVPI] = REG_FIELD(RT9455_REG_IRQ1, 6, 6),
[F_BATAB] = REG_FIELD(RT9455_REG_IRQ1, 0, 0),
[F_CHRVPI] = REG_FIELD(RT9455_REG_IRQ2, 7, 7),
[F_CHBATOVI] = REG_FIELD(RT9455_REG_IRQ2, 5, 5),
[F_CHTERMI] = REG_FIELD(RT9455_REG_IRQ2, 4, 4),
[F_CHRCHGI] = REG_FIELD(RT9455_REG_IRQ2, 3, 3),
[F_CH32MI] = REG_FIELD(RT9455_REG_IRQ2, 2, 2),
[F_CHTREGI] = REG_FIELD(RT9455_REG_IRQ2, 1, 1),
[F_CHMIVRI] = REG_FIELD(RT9455_REG_IRQ2, 0, 0),
[F_BSTBUSOVI] = REG_FIELD(RT9455_REG_IRQ3, 7, 7),
[F_BSTOLI] = REG_FIELD(RT9455_REG_IRQ3, 6, 6),
[F_BSTLOWVI] = REG_FIELD(RT9455_REG_IRQ3, 5, 5),
[F_BST32SI] = REG_FIELD(RT9455_REG_IRQ3, 3, 3),
[F_TSDM] = REG_FIELD(RT9455_REG_MASK1, 7, 7),
[F_VINOVPIM] = REG_FIELD(RT9455_REG_MASK1, 6, 6),
[F_BATABM] = REG_FIELD(RT9455_REG_MASK1, 0, 0),
[F_CHRVPIM] = REG_FIELD(RT9455_REG_MASK2, 7, 7),
[F_CHBATOVIM] = REG_FIELD(RT9455_REG_MASK2, 5, 5),
[F_CHTERMIM] = REG_FIELD(RT9455_REG_MASK2, 4, 4),
[F_CHRCHGIM] = REG_FIELD(RT9455_REG_MASK2, 3, 3),
[F_CH32MIM] = REG_FIELD(RT9455_REG_MASK2, 2, 2),
[F_CHTREGIM] = REG_FIELD(RT9455_REG_MASK2, 1, 1),
[F_CHMIVRIM] = REG_FIELD(RT9455_REG_MASK2, 0, 0),
[F_BSTVINOVIM] = REG_FIELD(RT9455_REG_MASK3, 7, 7),
[F_BSTOLIM] = REG_FIELD(RT9455_REG_MASK3, 6, 6),
[F_BSTLOWVIM] = REG_FIELD(RT9455_REG_MASK3, 5, 5),
[F_BST32SIM] = REG_FIELD(RT9455_REG_MASK3, 3, 3),
};
#define GET_MASK(fid) (BIT(rt9455_reg_fields[fid].msb + 1) - \
BIT(rt9455_reg_fields[fid].lsb))
/*
* Each array initialised below shows the possible real-world values for a
* group of bits belonging to RT9455 registers. The arrays are sorted in
* ascending order. The index of each real-world value represents the value
* that is encoded in the group of bits belonging to RT9455 registers.
*/
/* REG06[6:4] (ICHRG) in uAh */
static const int rt9455_ichrg_values[] = {
500000, 650000, 800000, 950000, 1100000, 1250000, 1400000, 1550000
};
/*
* When the charger is in charge mode, REG02[7:2] represent battery regulation
* voltage.
*/
/* REG02[7:2] (VOREG) in uV */
static const int rt9455_voreg_values[] = {
3500000, 3520000, 3540000, 3560000, 3580000, 3600000, 3620000, 3640000,
3660000, 3680000, 3700000, 3720000, 3740000, 3760000, 3780000, 3800000,
3820000, 3840000, 3860000, 3880000, 3900000, 3920000, 3940000, 3960000,
3980000, 4000000, 4020000, 4040000, 4060000, 4080000, 4100000, 4120000,
4140000, 4160000, 4180000, 4200000, 4220000, 4240000, 4260000, 4280000,
4300000, 4330000, 4350000, 4370000, 4390000, 4410000, 4430000, 4450000,
4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000,
4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000
};
/*
* When the charger is in boost mode, REG02[7:2] represent boost output
* voltage.
*/
/* REG02[7:2] (Boost output voltage) in uV */
static const int rt9455_boost_voltage_values[] = {
4425000, 4450000, 4475000, 4500000, 4525000, 4550000, 4575000, 4600000,
4625000, 4650000, 4675000, 4700000, 4725000, 4750000, 4775000, 4800000,
4825000, 4850000, 4875000, 4900000, 4925000, 4950000, 4975000, 5000000,
5025000, 5050000, 5075000, 5100000, 5125000, 5150000, 5175000, 5200000,
5225000, 5250000, 5275000, 5300000, 5325000, 5350000, 5375000, 5400000,
5425000, 5450000, 5475000, 5500000, 5525000, 5550000, 5575000, 5600000,
5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000,
5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000,
};
/* REG07[3:0] (VMREG) in uV */
static const int rt9455_vmreg_values[] = {
4200000, 4220000, 4240000, 4260000, 4280000, 4300000, 4320000, 4340000,
4360000, 4380000, 4400000, 4430000, 4450000, 4450000, 4450000, 4450000
};
/* REG05[5:4] (IEOC_PERCENTAGE) */
static const int rt9455_ieoc_percentage_values[] = {
10, 30, 20, 30
};
/* REG05[1:0] (MIVR) in uV */
static const int rt9455_mivr_values[] = {
4000000, 4250000, 4500000, 5000000
};
/* REG05[1:0] (IAICR) in uA */
static const int rt9455_iaicr_values[] = {
100000, 500000, 1000000, 2000000
};
struct rt9455_info {
struct i2c_client *client;
struct regmap *regmap;
struct regmap_field *regmap_fields[F_MAX_FIELDS];
struct power_supply *charger;
#if IS_ENABLED(CONFIG_USB_PHY)
struct usb_phy *usb_phy;
struct notifier_block nb;
#endif
struct delayed_work pwr_rdy_work;
struct delayed_work max_charging_time_work;
struct delayed_work batt_presence_work;
u32 voreg;
u32 boost_voltage;
};
/*
* Iterate through each element of the 'tbl' array until an element whose value
* is greater than v is found. Return the index of the respective element,
* or the index of the last element in the array, if no such element is found.
*/
static unsigned int rt9455_find_idx(const int tbl[], int tbl_size, int v)
{
int i;
/*
* No need to iterate until the last index in the table because
* if no element greater than v is found in the table,
* or if only the last element is greater than v,
* function returns the index of the last element.
*/
for (i = 0; i < tbl_size - 1; i++)
if (v <= tbl[i])
return i;
return (tbl_size - 1);
}
static int rt9455_get_field_val(struct rt9455_info *info,
enum rt9455_fields field,
const int tbl[], int tbl_size, int *val)
{
unsigned int v;
int ret;
ret = regmap_field_read(info->regmap_fields[field], &v);
if (ret)
return ret;
v = (v >= tbl_size) ? (tbl_size - 1) : v;
*val = tbl[v];
return 0;
}
static int rt9455_set_field_val(struct rt9455_info *info,
enum rt9455_fields field,
const int tbl[], int tbl_size, int val)
{
unsigned int idx = rt9455_find_idx(tbl, tbl_size, val);
return regmap_field_write(info->regmap_fields[field], idx);
}
static int rt9455_register_reset(struct rt9455_info *info)
{
struct device *dev = &info->client->dev;
unsigned int v;
int ret, limit = 100;
ret = regmap_field_write(info->regmap_fields[F_RST], 0x01);
if (ret) {
dev_err(dev, "Failed to set RST bit\n");
return ret;
}
/*
* To make sure that reset operation has finished, loop until RST bit
* is set to 0.
*/
do {
ret = regmap_field_read(info->regmap_fields[F_RST], &v);
if (ret) {
dev_err(dev, "Failed to read RST bit\n");
return ret;
}
if (!v)
break;
usleep_range(10, 100);
} while (--limit);
if (!limit)
return -EIO;
return 0;
}
/* Charger power supply property routines */
static enum power_supply_property rt9455_charger_properties[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_SCOPE,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static char *rt9455_charger_supplied_to[] = {
"main-battery",
};
static int rt9455_charger_get_status(struct rt9455_info *info,
union power_supply_propval *val)
{
unsigned int v, pwr_rdy;
int ret;
ret = regmap_field_read(info->regmap_fields[F_PWR_RDY],
&pwr_rdy);
if (ret) {
dev_err(&info->client->dev, "Failed to read PWR_RDY bit\n");
return ret;
}
/*
* If PWR_RDY bit is unset, the battery is discharging. Otherwise,
* STAT bits value must be checked.
*/
if (!pwr_rdy) {
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
return 0;
}
ret = regmap_field_read(info->regmap_fields[F_STAT], &v);
if (ret) {
dev_err(&info->client->dev, "Failed to read STAT bits\n");
return ret;
}
switch (v) {
case 0:
/*
* If PWR_RDY bit is set, but STAT bits value is 0, the charger
* may be in one of the following cases:
* 1. CHG_EN bit is 0.
* 2. CHG_EN bit is 1 but the battery is not connected.
* In any of these cases, POWER_SUPPLY_STATUS_NOT_CHARGING is
* returned.
*/
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
return 0;
case 1:
val->intval = POWER_SUPPLY_STATUS_CHARGING;
return 0;
case 2:
val->intval = POWER_SUPPLY_STATUS_FULL;
return 0;
default:
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
return 0;
}
}
static int rt9455_charger_get_health(struct rt9455_info *info,
union power_supply_propval *val)
{
struct device *dev = &info->client->dev;
unsigned int v;
int ret;
val->intval = POWER_SUPPLY_HEALTH_GOOD;
ret = regmap_read(info->regmap, RT9455_REG_IRQ1, &v);
if (ret) {
dev_err(dev, "Failed to read IRQ1 register\n");
return ret;
}
if (v & GET_MASK(F_TSDI)) {
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
return 0;
}
if (v & GET_MASK(F_VINOVPI)) {
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
return 0;
}
if (v & GET_MASK(F_BATAB)) {
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
return 0;
}
ret = regmap_read(info->regmap, RT9455_REG_IRQ2, &v);
if (ret) {
dev_err(dev, "Failed to read IRQ2 register\n");
return ret;
}
if (v & GET_MASK(F_CHBATOVI)) {
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
return 0;
}
if (v & GET_MASK(F_CH32MI)) {
val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
return 0;
}
ret = regmap_read(info->regmap, RT9455_REG_IRQ3, &v);
if (ret) {
dev_err(dev, "Failed to read IRQ3 register\n");
return ret;
}
if (v & GET_MASK(F_BSTBUSOVI)) {
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
return 0;
}
if (v & GET_MASK(F_BSTOLI)) {
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
return 0;
}
if (v & GET_MASK(F_BSTLOWVI)) {
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
return 0;
}
if (v & GET_MASK(F_BST32SI)) {
val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
return 0;
}
ret = regmap_field_read(info->regmap_fields[F_STAT], &v);
if (ret) {
dev_err(dev, "Failed to read STAT bits\n");
return ret;
}
if (v == RT9455_FAULT) {
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
return 0;
}
return 0;
}
static int rt9455_charger_get_battery_presence(struct rt9455_info *info,
union power_supply_propval *val)
{
unsigned int v;
int ret;
ret = regmap_field_read(info->regmap_fields[F_BATAB], &v);
if (ret) {
dev_err(&info->client->dev, "Failed to read BATAB bit\n");
return ret;
}
/*
* Since BATAB is 1 when battery is NOT present and 0 otherwise,
* !BATAB is returned.
*/
val->intval = !v;
return 0;
}
static int rt9455_charger_get_online(struct rt9455_info *info,
union power_supply_propval *val)
{
unsigned int v;
int ret;
ret = regmap_field_read(info->regmap_fields[F_PWR_RDY], &v);
if (ret) {
dev_err(&info->client->dev, "Failed to read PWR_RDY bit\n");
return ret;
}
val->intval = (int)v;
return 0;
}
static int rt9455_charger_get_current(struct rt9455_info *info,
union power_supply_propval *val)
{
int curr;
int ret;
ret = rt9455_get_field_val(info, F_ICHRG,
rt9455_ichrg_values,
ARRAY_SIZE(rt9455_ichrg_values),
&curr);
if (ret) {
dev_err(&info->client->dev, "Failed to read ICHRG value\n");
return ret;
}
val->intval = curr;
return 0;
}
static int rt9455_charger_get_current_max(struct rt9455_info *info,
union power_supply_propval *val)
{
int idx = ARRAY_SIZE(rt9455_ichrg_values) - 1;
val->intval = rt9455_ichrg_values[idx];
return 0;
}
static int rt9455_charger_get_voltage(struct rt9455_info *info,
union power_supply_propval *val)
{
int voltage;
int ret;
ret = rt9455_get_field_val(info, F_VOREG,
rt9455_voreg_values,
ARRAY_SIZE(rt9455_voreg_values),
&voltage);
if (ret) {
dev_err(&info->client->dev, "Failed to read VOREG value\n");
return ret;
}
val->intval = voltage;
return 0;
}
static int rt9455_charger_get_voltage_max(struct rt9455_info *info,
union power_supply_propval *val)
{
int idx = ARRAY_SIZE(rt9455_vmreg_values) - 1;
val->intval = rt9455_vmreg_values[idx];
return 0;
}
static int rt9455_charger_get_term_current(struct rt9455_info *info,
union power_supply_propval *val)
{
struct device *dev = &info->client->dev;
int ichrg, ieoc_percentage, ret;
ret = rt9455_get_field_val(info, F_ICHRG,
rt9455_ichrg_values,
ARRAY_SIZE(rt9455_ichrg_values),
&ichrg);
if (ret) {
dev_err(dev, "Failed to read ICHRG value\n");
return ret;
}
ret = rt9455_get_field_val(info, F_IEOC_PERCENTAGE,
rt9455_ieoc_percentage_values,
ARRAY_SIZE(rt9455_ieoc_percentage_values),
&ieoc_percentage);
if (ret) {
dev_err(dev, "Failed to read IEOC value\n");
return ret;
}
val->intval = ichrg * ieoc_percentage / 100;
return 0;
}
static int rt9455_charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct rt9455_info *info = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
return rt9455_charger_get_status(info, val);
case POWER_SUPPLY_PROP_HEALTH:
return rt9455_charger_get_health(info, val);
case POWER_SUPPLY_PROP_PRESENT:
return rt9455_charger_get_battery_presence(info, val);
case POWER_SUPPLY_PROP_ONLINE:
return rt9455_charger_get_online(info, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
return rt9455_charger_get_current(info, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
return rt9455_charger_get_current_max(info, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
return rt9455_charger_get_voltage(info, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
return rt9455_charger_get_voltage_max(info, val);
case POWER_SUPPLY_PROP_SCOPE:
val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
return 0;
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return rt9455_charger_get_term_current(info, val);
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = RT9455_MODEL_NAME;
return 0;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = RT9455_MANUFACTURER;
return 0;
default:
return -ENODATA;
}
}
static int rt9455_hw_init(struct rt9455_info *info, u32 ichrg,
u32 ieoc_percentage,
u32 mivr, u32 iaicr)
{
struct device *dev = &info->client->dev;
int idx, ret;
ret = rt9455_register_reset(info);
if (ret) {
dev_err(dev, "Power On Reset failed\n");
return ret;
}
/* Set TE bit in order to enable end of charge detection */
ret = regmap_field_write(info->regmap_fields[F_TE], 1);
if (ret) {
dev_err(dev, "Failed to set TE bit\n");
return ret;
}
/* Set TE_SHDN_EN bit in order to enable end of charge detection */
ret = regmap_field_write(info->regmap_fields[F_TE_SHDN_EN], 1);
if (ret) {
dev_err(dev, "Failed to set TE_SHDN_EN bit\n");
return ret;
}
/*
* Set BATD_EN bit in order to enable battery detection
* when charging is done
*/
ret = regmap_field_write(info->regmap_fields[F_BATD_EN], 1);
if (ret) {
dev_err(dev, "Failed to set BATD_EN bit\n");
return ret;
}
/*
* Disable Safety Timer. In charge mode, this timer terminates charging
* if no read or write via I2C is done within 32 minutes. This timer
* avoids overcharging the baterry when the OS is not loaded and the
* charger is connected to a power source.
* In boost mode, this timer triggers BST32SI interrupt if no read or
* write via I2C is done within 32 seconds.
* When the OS is loaded and the charger driver is inserted, it is used
* delayed_work, named max_charging_time_work, to avoid overcharging
* the battery.
*/
ret = regmap_field_write(info->regmap_fields[F_TMR_EN], 0x00);
if (ret) {
dev_err(dev, "Failed to disable Safety Timer\n");
return ret;
}
/* Set ICHRG to value retrieved from device-specific data */
ret = rt9455_set_field_val(info, F_ICHRG,
rt9455_ichrg_values,
ARRAY_SIZE(rt9455_ichrg_values), ichrg);
if (ret) {
dev_err(dev, "Failed to set ICHRG value\n");
return ret;
}
/* Set IEOC Percentage to value retrieved from device-specific data */
ret = rt9455_set_field_val(info, F_IEOC_PERCENTAGE,
rt9455_ieoc_percentage_values,
ARRAY_SIZE(rt9455_ieoc_percentage_values),
ieoc_percentage);
if (ret) {
dev_err(dev, "Failed to set IEOC Percentage value\n");
return ret;
}
/* Set VOREG to value retrieved from device-specific data */
ret = rt9455_set_field_val(info, F_VOREG,
rt9455_voreg_values,
ARRAY_SIZE(rt9455_voreg_values),
info->voreg);
if (ret) {
dev_err(dev, "Failed to set VOREG value\n");
return ret;
}
/* Set VMREG value to maximum (4.45V). */
idx = ARRAY_SIZE(rt9455_vmreg_values) - 1;
ret = rt9455_set_field_val(info, F_VMREG,
rt9455_vmreg_values,
ARRAY_SIZE(rt9455_vmreg_values),
rt9455_vmreg_values[idx]);
if (ret) {
dev_err(dev, "Failed to set VMREG value\n");
return ret;
}
/*
* Set MIVR to value retrieved from device-specific data.
* If no value is specified, default value for MIVR is 4.5V.
*/
if (mivr == -1)
mivr = 4500000;
ret = rt9455_set_field_val(info, F_MIVR,
rt9455_mivr_values,
ARRAY_SIZE(rt9455_mivr_values), mivr);
if (ret) {
dev_err(dev, "Failed to set MIVR value\n");
return ret;
}
/*
* Set IAICR to value retrieved from device-specific data.
* If no value is specified, default value for IAICR is 500 mA.
*/
if (iaicr == -1)
iaicr = 500000;
ret = rt9455_set_field_val(info, F_IAICR,
rt9455_iaicr_values,
ARRAY_SIZE(rt9455_iaicr_values), iaicr);
if (ret) {
dev_err(dev, "Failed to set IAICR value\n");
return ret;
}
/*
* Set IAICR_INT bit so that IAICR value is determined by IAICR bits
* and not by OTG pin.
*/
ret = regmap_field_write(info->regmap_fields[F_IAICR_INT], 0x01);
if (ret) {
dev_err(dev, "Failed to set IAICR_INT bit\n");
return ret;
}
/*
* Disable CHMIVRI interrupt. Because the driver sets MIVR value,
* CHMIVRI is triggered, but there is no action to be taken by the
* driver when CHMIVRI is triggered.
*/
ret = regmap_field_write(info->regmap_fields[F_CHMIVRIM], 0x01);
if (ret) {
dev_err(dev, "Failed to mask CHMIVRI interrupt\n");
return ret;
}
return 0;
}
#if IS_ENABLED(CONFIG_USB_PHY)
/*
* Before setting the charger into boost mode, boost output voltage is
* set. This is needed because boost output voltage may differ from battery
* regulation voltage. F_VOREG bits represent either battery regulation voltage
* or boost output voltage, depending on the mode the charger is. Both battery
* regulation voltage and boost output voltage are read from DT/ACPI during
* probe.
*/
static int rt9455_set_boost_voltage_before_boost_mode(struct rt9455_info *info)
{
struct device *dev = &info->client->dev;
int ret;
ret = rt9455_set_field_val(info, F_VOREG,
rt9455_boost_voltage_values,
ARRAY_SIZE(rt9455_boost_voltage_values),
info->boost_voltage);
if (ret) {
dev_err(dev, "Failed to set boost output voltage value\n");
return ret;
}
return 0;
}
#endif
/*
* Before setting the charger into charge mode, battery regulation voltage is
* set. This is needed because boost output voltage may differ from battery
* regulation voltage. F_VOREG bits represent either battery regulation voltage
* or boost output voltage, depending on the mode the charger is. Both battery
* regulation voltage and boost output voltage are read from DT/ACPI during
* probe.
*/
static int rt9455_set_voreg_before_charge_mode(struct rt9455_info *info)
{
struct device *dev = &info->client->dev;
int ret;
ret = rt9455_set_field_val(info, F_VOREG,
rt9455_voreg_values,
ARRAY_SIZE(rt9455_voreg_values),
info->voreg);
if (ret) {
dev_err(dev, "Failed to set VOREG value\n");
return ret;
}
return 0;
}
static int rt9455_irq_handler_check_irq1_register(struct rt9455_info *info,
bool *_is_battery_absent,
bool *_alert_userspace)
{
unsigned int irq1, mask1, mask2;
struct device *dev = &info->client->dev;
bool is_battery_absent = false;
bool alert_userspace = false;
int ret;
ret = regmap_read(info->regmap, RT9455_REG_IRQ1, &irq1);
if (ret) {
dev_err(dev, "Failed to read IRQ1 register\n");
return ret;
}
ret = regmap_read(info->regmap, RT9455_REG_MASK1, &mask1);
if (ret) {
dev_err(dev, "Failed to read MASK1 register\n");
return ret;
}
if (irq1 & GET_MASK(F_TSDI)) {
dev_err(dev, "Thermal shutdown fault occurred\n");
alert_userspace = true;
}
if (irq1 & GET_MASK(F_VINOVPI)) {
dev_err(dev, "Overvoltage input occurred\n");
alert_userspace = true;
}
if (irq1 & GET_MASK(F_BATAB)) {
dev_err(dev, "Battery absence occurred\n");
is_battery_absent = true;
alert_userspace = true;
if ((mask1 & GET_MASK(F_BATABM)) == 0) {
ret = regmap_field_write(info->regmap_fields[F_BATABM],
0x01);
if (ret) {
dev_err(dev, "Failed to mask BATAB interrupt\n");
return ret;
}
}
ret = regmap_read(info->regmap, RT9455_REG_MASK2, &mask2);
if (ret) {
dev_err(dev, "Failed to read MASK2 register\n");
return ret;
}
if (mask2 & GET_MASK(F_CHTERMIM)) {
ret = regmap_field_write(
info->regmap_fields[F_CHTERMIM], 0x00);
if (ret) {
dev_err(dev, "Failed to unmask CHTERMI interrupt\n");
return ret;
}
}
if (mask2 & GET_MASK(F_CHRCHGIM)) {
ret = regmap_field_write(
info->regmap_fields[F_CHRCHGIM], 0x00);
if (ret) {
dev_err(dev, "Failed to unmask CHRCHGI interrupt\n");
return ret;
}
}
/*
* When the battery is absent, max_charging_time_work is
* cancelled, since no charging is done.
*/
cancel_delayed_work_sync(&info->max_charging_time_work);
/*
* Since no interrupt is triggered when the battery is
* reconnected, max_charging_time_work is not rescheduled.
* Therefore, batt_presence_work is scheduled to check whether
* the battery is still absent or not.
*/
queue_delayed_work(system_power_efficient_wq,
&info->batt_presence_work,
RT9455_BATT_PRESENCE_DELAY * HZ);
}
*_is_battery_absent = is_battery_absent;
if (alert_userspace)
*_alert_userspace = alert_userspace;
return 0;
}
static int rt9455_irq_handler_check_irq2_register(struct rt9455_info *info,
bool is_battery_absent,
bool *_alert_userspace)
{
unsigned int irq2, mask2;
struct device *dev = &info->client->dev;
bool alert_userspace = false;
int ret;
ret = regmap_read(info->regmap, RT9455_REG_IRQ2, &irq2);
if (ret) {
dev_err(dev, "Failed to read IRQ2 register\n");
return ret;
}
ret = regmap_read(info->regmap, RT9455_REG_MASK2, &mask2);
if (ret) {
dev_err(dev, "Failed to read MASK2 register\n");
return ret;
}
if (irq2 & GET_MASK(F_CHRVPI)) {
dev_dbg(dev, "Charger fault occurred\n");
/*
* CHRVPI bit is set in 2 cases:
* 1. when the power source is connected to the charger.
* 2. when the power source is disconnected from the charger.
* To identify the case, PWR_RDY bit is checked. Because
* PWR_RDY bit is set / cleared after CHRVPI interrupt is
* triggered, it is used delayed_work to later read PWR_RDY bit.
* Also, do not set to true alert_userspace, because there is no
* need to notify userspace when CHRVPI interrupt has occurred.
* Userspace will be notified after PWR_RDY bit is read.
*/
queue_delayed_work(system_power_efficient_wq,
&info->pwr_rdy_work,
RT9455_PWR_RDY_DELAY * HZ);
}
if (irq2 & GET_MASK(F_CHBATOVI)) {
dev_err(dev, "Battery OVP occurred\n");
alert_userspace = true;
}
if (irq2 & GET_MASK(F_CHTERMI)) {
dev_dbg(dev, "Charge terminated\n");
if (!is_battery_absent) {
if ((mask2 & GET_MASK(F_CHTERMIM)) == 0) {
ret = regmap_field_write(
info->regmap_fields[F_CHTERMIM], 0x01);
if (ret) {
dev_err(dev, "Failed to mask CHTERMI interrupt\n");
return ret;
}
/*
* Update MASK2 value, since CHTERMIM bit is
* set.
*/
mask2 = mask2 | GET_MASK(F_CHTERMIM);
}
cancel_delayed_work_sync(&info->max_charging_time_work);
alert_userspace = true;
}
}
if (irq2 & GET_MASK(F_CHRCHGI)) {
dev_dbg(dev, "Recharge request\n");
ret = regmap_field_write(info->regmap_fields[F_CHG_EN],
RT9455_CHARGE_ENABLE);
if (ret) {
dev_err(dev, "Failed to enable charging\n");
return ret;
}
if (mask2 & GET_MASK(F_CHTERMIM)) {
ret = regmap_field_write(
info->regmap_fields[F_CHTERMIM], 0x00);
if (ret) {
dev_err(dev, "Failed to unmask CHTERMI interrupt\n");
return ret;
}
/* Update MASK2 value, since CHTERMIM bit is cleared. */
mask2 = mask2 & ~GET_MASK(F_CHTERMIM);
}
if (!is_battery_absent) {
/*
* No need to check whether the charger is connected to
* power source when CHRCHGI is received, since CHRCHGI
* is not triggered if the charger is not connected to
* the power source.
*/
queue_delayed_work(system_power_efficient_wq,
&info->max_charging_time_work,
RT9455_MAX_CHARGING_TIME * HZ);
alert_userspace = true;
}
}
if (irq2 & GET_MASK(F_CH32MI)) {
dev_err(dev, "Charger fault. 32 mins timeout occurred\n");
alert_userspace = true;
}
if (irq2 & GET_MASK(F_CHTREGI)) {
dev_warn(dev,
"Charger warning. Thermal regulation loop active\n");
alert_userspace = true;
}
if (irq2 & GET_MASK(F_CHMIVRI)) {
dev_dbg(dev,
"Charger warning. Input voltage MIVR loop active\n");
}
if (alert_userspace)
*_alert_userspace = alert_userspace;
return 0;
}
static int rt9455_irq_handler_check_irq3_register(struct rt9455_info *info,
bool *_alert_userspace)
{
unsigned int irq3, mask3;
struct device *dev = &info->client->dev;
bool alert_userspace = false;
int ret;
ret = regmap_read(info->regmap, RT9455_REG_IRQ3, &irq3);
if (ret) {
dev_err(dev, "Failed to read IRQ3 register\n");
return ret;
}
ret = regmap_read(info->regmap, RT9455_REG_MASK3, &mask3);
if (ret) {
dev_err(dev, "Failed to read MASK3 register\n");
return ret;
}
if (irq3 & GET_MASK(F_BSTBUSOVI)) {
dev_err(dev, "Boost fault. Overvoltage input occurred\n");
alert_userspace = true;
}
if (irq3 & GET_MASK(F_BSTOLI)) {
dev_err(dev, "Boost fault. Overload\n");
alert_userspace = true;
}
if (irq3 & GET_MASK(F_BSTLOWVI)) {
dev_err(dev, "Boost fault. Battery voltage too low\n");
alert_userspace = true;
}
if (irq3 & GET_MASK(F_BST32SI)) {
dev_err(dev, "Boost fault. 32 seconds timeout occurred.\n");
alert_userspace = true;
}
if (alert_userspace) {
dev_info(dev, "Boost fault occurred, therefore the charger goes into charge mode\n");
ret = rt9455_set_voreg_before_charge_mode(info);
if (ret) {
dev_err(dev, "Failed to set VOREG before entering charge mode\n");
return ret;
}
ret = regmap_field_write(info->regmap_fields[F_OPA_MODE],
RT9455_CHARGE_MODE);
if (ret) {
dev_err(dev, "Failed to set charger in charge mode\n");
return ret;
}
*_alert_userspace = alert_userspace;
}
return 0;
}
static irqreturn_t rt9455_irq_handler_thread(int irq, void *data)
{
struct rt9455_info *info = data;
struct device *dev;
bool alert_userspace = false;
bool is_battery_absent = false;
unsigned int status;
int ret;
if (!info)
return IRQ_NONE;
dev = &info->client->dev;
if (irq != info->client->irq) {
dev_err(dev, "Interrupt is not for RT9455 charger\n");
return IRQ_NONE;
}
ret = regmap_field_read(info->regmap_fields[F_STAT], &status);
if (ret) {
dev_err(dev, "Failed to read STAT bits\n");
return IRQ_HANDLED;
}
dev_dbg(dev, "Charger status is %d\n", status);
/*
* Each function that processes an IRQ register receives as output
* parameter alert_userspace pointer. alert_userspace is set to true
* in such a function only if an interrupt has occurred in the
* respective interrupt register. This way, it is avoided the following
* case: interrupt occurs only in IRQ1 register,
* rt9455_irq_handler_check_irq1_register() function sets to true
* alert_userspace, but rt9455_irq_handler_check_irq2_register()
* and rt9455_irq_handler_check_irq3_register() functions set to false
* alert_userspace and power_supply_changed() is never called.
*/
ret = rt9455_irq_handler_check_irq1_register(info, &is_battery_absent,
&alert_userspace);
if (ret) {
dev_err(dev, "Failed to handle IRQ1 register\n");
return IRQ_HANDLED;
}
ret = rt9455_irq_handler_check_irq2_register(info, is_battery_absent,
&alert_userspace);
if (ret) {
dev_err(dev, "Failed to handle IRQ2 register\n");
return IRQ_HANDLED;
}
ret = rt9455_irq_handler_check_irq3_register(info, &alert_userspace);
if (ret) {
dev_err(dev, "Failed to handle IRQ3 register\n");
return IRQ_HANDLED;
}
if (alert_userspace) {
/*
* Sometimes, an interrupt occurs while rt9455_probe() function
* is executing and power_supply_register() is not yet called.
* Do not call power_supply_changed() in this case.
*/
if (info->charger)
power_supply_changed(info->charger);
}
return IRQ_HANDLED;
}
static int rt9455_discover_charger(struct rt9455_info *info, u32 *ichrg,
u32 *ieoc_percentage,
u32 *mivr, u32 *iaicr)
{
struct device *dev = &info->client->dev;
int ret;
if (!dev->of_node && !ACPI_HANDLE(dev)) {
dev_err(dev, "No support for either device tree or ACPI\n");
return -EINVAL;
}
/*
* ICHRG, IEOC_PERCENTAGE, VOREG and boost output voltage are mandatory
* parameters.
*/
ret = device_property_read_u32(dev, "richtek,output-charge-current",
ichrg);
if (ret) {
dev_err(dev, "Error: missing \"output-charge-current\" property\n");
return ret;
}
ret = device_property_read_u32(dev, "richtek,end-of-charge-percentage",
ieoc_percentage);
if (ret) {
dev_err(dev, "Error: missing \"end-of-charge-percentage\" property\n");
return ret;
}
ret = device_property_read_u32(dev,
"richtek,battery-regulation-voltage",
&info->voreg);
if (ret) {
dev_err(dev, "Error: missing \"battery-regulation-voltage\" property\n");
return ret;
}
ret = device_property_read_u32(dev, "richtek,boost-output-voltage",
&info->boost_voltage);
if (ret) {
dev_err(dev, "Error: missing \"boost-output-voltage\" property\n");
return ret;
}
/*
* MIVR and IAICR are optional parameters. Do not return error if one of
* them is not present in ACPI table or device tree specification.
*/
device_property_read_u32(dev, "richtek,min-input-voltage-regulation",
mivr);
device_property_read_u32(dev, "richtek,avg-input-current-regulation",
iaicr);
return 0;
}
#if IS_ENABLED(CONFIG_USB_PHY)
static int rt9455_usb_event_none(struct rt9455_info *info,
u8 opa_mode, u8 iaicr)
{
struct device *dev = &info->client->dev;
int ret;
if (opa_mode == RT9455_BOOST_MODE) {
ret = rt9455_set_voreg_before_charge_mode(info);
if (ret) {
dev_err(dev, "Failed to set VOREG before entering charge mode\n");
return ret;
}
/*
* If the charger is in boost mode, and it has received
* USB_EVENT_NONE, this means the consumer device powered by the
* charger is not connected anymore.
* In this case, the charger goes into charge mode.
*/
dev_dbg(dev, "USB_EVENT_NONE received, therefore the charger goes into charge mode\n");
ret = regmap_field_write(info->regmap_fields[F_OPA_MODE],
RT9455_CHARGE_MODE);
if (ret) {
dev_err(dev, "Failed to set charger in charge mode\n");
return NOTIFY_DONE;
}
}
dev_dbg(dev, "USB_EVENT_NONE received, therefore IAICR is set to its minimum value\n");
if (iaicr != RT9455_IAICR_100MA) {
ret = regmap_field_write(info->regmap_fields[F_IAICR],
RT9455_IAICR_100MA);
if (ret) {
dev_err(dev, "Failed to set IAICR value\n");
return NOTIFY_DONE;
}
}
return NOTIFY_OK;
}
static int rt9455_usb_event_vbus(struct rt9455_info *info,
u8 opa_mode, u8 iaicr)
{
struct device *dev = &info->client->dev;
int ret;
if (opa_mode == RT9455_BOOST_MODE) {
ret = rt9455_set_voreg_before_charge_mode(info);
if (ret) {
dev_err(dev, "Failed to set VOREG before entering charge mode\n");
return ret;
}
/*
* If the charger is in boost mode, and it has received
* USB_EVENT_VBUS, this means the consumer device powered by the
* charger is not connected anymore.
* In this case, the charger goes into charge mode.
*/
dev_dbg(dev, "USB_EVENT_VBUS received, therefore the charger goes into charge mode\n");
ret = regmap_field_write(info->regmap_fields[F_OPA_MODE],
RT9455_CHARGE_MODE);
if (ret) {
dev_err(dev, "Failed to set charger in charge mode\n");
return NOTIFY_DONE;
}
}
dev_dbg(dev, "USB_EVENT_VBUS received, therefore IAICR is set to 500 mA\n");
if (iaicr != RT9455_IAICR_500MA) {
ret = regmap_field_write(info->regmap_fields[F_IAICR],
RT9455_IAICR_500MA);
if (ret) {
dev_err(dev, "Failed to set IAICR value\n");
return NOTIFY_DONE;
}
}
return NOTIFY_OK;
}
static int rt9455_usb_event_id(struct rt9455_info *info,
u8 opa_mode, u8 iaicr)
{
struct device *dev = &info->client->dev;
int ret;
if (opa_mode == RT9455_CHARGE_MODE) {
ret = rt9455_set_boost_voltage_before_boost_mode(info);
if (ret) {
dev_err(dev, "Failed to set boost output voltage before entering boost mode\n");
return ret;
}
/*
* If the charger is in charge mode, and it has received
* USB_EVENT_ID, this means a consumer device is connected and
* it should be powered by the charger.
* In this case, the charger goes into boost mode.
*/
dev_dbg(dev, "USB_EVENT_ID received, therefore the charger goes into boost mode\n");
ret = regmap_field_write(info->regmap_fields[F_OPA_MODE],
RT9455_BOOST_MODE);
if (ret) {
dev_err(dev, "Failed to set charger in boost mode\n");
return NOTIFY_DONE;
}
}
dev_dbg(dev, "USB_EVENT_ID received, therefore IAICR is set to its minimum value\n");
if (iaicr != RT9455_IAICR_100MA) {
ret = regmap_field_write(info->regmap_fields[F_IAICR],
RT9455_IAICR_100MA);
if (ret) {
dev_err(dev, "Failed to set IAICR value\n");
return NOTIFY_DONE;
}
}
return NOTIFY_OK;
}
static int rt9455_usb_event_charger(struct rt9455_info *info,
u8 opa_mode, u8 iaicr)
{
struct device *dev = &info->client->dev;
int ret;
if (opa_mode == RT9455_BOOST_MODE) {
ret = rt9455_set_voreg_before_charge_mode(info);
if (ret) {
dev_err(dev, "Failed to set VOREG before entering charge mode\n");
return ret;
}
/*
* If the charger is in boost mode, and it has received
* USB_EVENT_CHARGER, this means the consumer device powered by
* the charger is not connected anymore.
* In this case, the charger goes into charge mode.
*/
dev_dbg(dev, "USB_EVENT_CHARGER received, therefore the charger goes into charge mode\n");
ret = regmap_field_write(info->regmap_fields[F_OPA_MODE],
RT9455_CHARGE_MODE);
if (ret) {
dev_err(dev, "Failed to set charger in charge mode\n");
return NOTIFY_DONE;
}
}
dev_dbg(dev, "USB_EVENT_CHARGER received, therefore IAICR is set to no current limit\n");
if (iaicr != RT9455_IAICR_NO_LIMIT) {
ret = regmap_field_write(info->regmap_fields[F_IAICR],
RT9455_IAICR_NO_LIMIT);
if (ret) {
dev_err(dev, "Failed to set IAICR value\n");
return NOTIFY_DONE;
}
}
return NOTIFY_OK;
}
static int rt9455_usb_event(struct notifier_block *nb,
unsigned long event, void *power)
{
struct rt9455_info *info = container_of(nb, struct rt9455_info, nb);
struct device *dev = &info->client->dev;
unsigned int opa_mode, iaicr;
int ret;
/*
* Determine whether the charger is in charge mode
* or in boost mode.
*/
ret = regmap_field_read(info->regmap_fields[F_OPA_MODE],
&opa_mode);
if (ret) {
dev_err(dev, "Failed to read OPA_MODE value\n");
return NOTIFY_DONE;
}
ret = regmap_field_read(info->regmap_fields[F_IAICR],
&iaicr);
if (ret) {
dev_err(dev, "Failed to read IAICR value\n");
return NOTIFY_DONE;
}
dev_dbg(dev, "Received USB event %lu\n", event);
switch (event) {
case USB_EVENT_NONE:
return rt9455_usb_event_none(info, opa_mode, iaicr);
case USB_EVENT_VBUS:
return rt9455_usb_event_vbus(info, opa_mode, iaicr);
case USB_EVENT_ID:
return rt9455_usb_event_id(info, opa_mode, iaicr);
case USB_EVENT_CHARGER:
return rt9455_usb_event_charger(info, opa_mode, iaicr);
default:
dev_err(dev, "Unknown USB event\n");
}
return NOTIFY_DONE;
}
#endif
static void rt9455_pwr_rdy_work_callback(struct work_struct *work)
{
struct rt9455_info *info = container_of(work, struct rt9455_info,
pwr_rdy_work.work);
struct device *dev = &info->client->dev;
unsigned int pwr_rdy;
int ret;
ret = regmap_field_read(info->regmap_fields[F_PWR_RDY], &pwr_rdy);
if (ret) {
dev_err(dev, "Failed to read PWR_RDY bit\n");
return;
}
switch (pwr_rdy) {
case RT9455_PWR_FAULT:
dev_dbg(dev, "Charger disconnected from power source\n");
cancel_delayed_work_sync(&info->max_charging_time_work);
break;
case RT9455_PWR_GOOD:
dev_dbg(dev, "Charger connected to power source\n");
ret = regmap_field_write(info->regmap_fields[F_CHG_EN],
RT9455_CHARGE_ENABLE);
if (ret) {
dev_err(dev, "Failed to enable charging\n");
return;
}
queue_delayed_work(system_power_efficient_wq,
&info->max_charging_time_work,
RT9455_MAX_CHARGING_TIME * HZ);
break;
}
/*
* Notify userspace that the charger has been either connected to or
* disconnected from the power source.
*/
power_supply_changed(info->charger);
}
static void rt9455_max_charging_time_work_callback(struct work_struct *work)
{
struct rt9455_info *info = container_of(work, struct rt9455_info,
max_charging_time_work.work);
struct device *dev = &info->client->dev;
int ret;
dev_err(dev, "Battery has been charging for at least 6 hours and is not yet fully charged. Battery is dead, therefore charging is disabled.\n");
ret = regmap_field_write(info->regmap_fields[F_CHG_EN],
RT9455_CHARGE_DISABLE);
if (ret)
dev_err(dev, "Failed to disable charging\n");
}
static void rt9455_batt_presence_work_callback(struct work_struct *work)
{
struct rt9455_info *info = container_of(work, struct rt9455_info,
batt_presence_work.work);
struct device *dev = &info->client->dev;
unsigned int irq1, mask1;
int ret;
ret = regmap_read(info->regmap, RT9455_REG_IRQ1, &irq1);
if (ret) {
dev_err(dev, "Failed to read IRQ1 register\n");
return;
}
/*
* If the battery is still absent, batt_presence_work is rescheduled.
* Otherwise, max_charging_time is scheduled.
*/
if (irq1 & GET_MASK(F_BATAB)) {
queue_delayed_work(system_power_efficient_wq,
&info->batt_presence_work,
RT9455_BATT_PRESENCE_DELAY * HZ);
} else {
queue_delayed_work(system_power_efficient_wq,
&info->max_charging_time_work,
RT9455_MAX_CHARGING_TIME * HZ);
ret = regmap_read(info->regmap, RT9455_REG_MASK1, &mask1);
if (ret) {
dev_err(dev, "Failed to read MASK1 register\n");
return;
}
if (mask1 & GET_MASK(F_BATABM)) {
ret = regmap_field_write(info->regmap_fields[F_BATABM],
0x00);
if (ret)
dev_err(dev, "Failed to unmask BATAB interrupt\n");
}
/*
* Notify userspace that the battery is now connected to the
* charger.
*/
power_supply_changed(info->charger);
}
}
static const struct power_supply_desc rt9455_charger_desc = {
.name = RT9455_DRIVER_NAME,
.type = POWER_SUPPLY_TYPE_USB,
.properties = rt9455_charger_properties,
.num_properties = ARRAY_SIZE(rt9455_charger_properties),
.get_property = rt9455_charger_get_property,
};
static bool rt9455_is_writeable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case RT9455_REG_DEV_ID:
case RT9455_REG_IRQ1:
case RT9455_REG_IRQ2:
case RT9455_REG_IRQ3:
return false;
default:
return true;
}
}
static bool rt9455_is_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case RT9455_REG_DEV_ID:
case RT9455_REG_CTRL5:
case RT9455_REG_CTRL6:
return false;
default:
return true;
}
}
static const struct regmap_config rt9455_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.writeable_reg = rt9455_is_writeable_reg,
.volatile_reg = rt9455_is_volatile_reg,
.max_register = RT9455_REG_MASK3,
.cache_type = REGCACHE_RBTREE,
};
static int rt9455_probe(struct i2c_client *client)
{
struct i2c_adapter *adapter = client->adapter;
struct device *dev = &client->dev;
struct rt9455_info *info;
struct power_supply_config rt9455_charger_config = {};
/*
* Mandatory device-specific data values. Also, VOREG and boost output
* voltage are mandatory values, but they are stored in rt9455_info
* structure.
*/
u32 ichrg, ieoc_percentage;
/* Optional device-specific data values. */
u32 mivr = -1, iaicr = -1;
int i, ret;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_err(dev, "No support for SMBUS_BYTE_DATA\n");
return -ENODEV;
}
info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->client = client;
i2c_set_clientdata(client, info);
info->regmap = devm_regmap_init_i2c(client,
&rt9455_regmap_config);
if (IS_ERR(info->regmap)) {
dev_err(dev, "Failed to initialize register map\n");
return -EINVAL;
}
for (i = 0; i < F_MAX_FIELDS; i++) {
info->regmap_fields[i] =
devm_regmap_field_alloc(dev, info->regmap,
rt9455_reg_fields[i]);
if (IS_ERR(info->regmap_fields[i])) {
dev_err(dev,
"Failed to allocate regmap field = %d\n", i);
return PTR_ERR(info->regmap_fields[i]);
}
}
ret = rt9455_discover_charger(info, &ichrg, &ieoc_percentage,
&mivr, &iaicr);
if (ret) {
dev_err(dev, "Failed to discover charger\n");
return ret;
}
#if IS_ENABLED(CONFIG_USB_PHY)
info->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
if (IS_ERR(info->usb_phy)) {
dev_err(dev, "Failed to get USB transceiver\n");
} else {
info->nb.notifier_call = rt9455_usb_event;
ret = usb_register_notifier(info->usb_phy, &info->nb);
if (ret) {
dev_err(dev, "Failed to register USB notifier\n");
/*
* If usb_register_notifier() fails, set notifier_call
* to NULL, to avoid calling usb_unregister_notifier().
*/
info->nb.notifier_call = NULL;
}
}
#endif
INIT_DEFERRABLE_WORK(&info->pwr_rdy_work, rt9455_pwr_rdy_work_callback);
INIT_DEFERRABLE_WORK(&info->max_charging_time_work,
rt9455_max_charging_time_work_callback);
INIT_DEFERRABLE_WORK(&info->batt_presence_work,
rt9455_batt_presence_work_callback);
rt9455_charger_config.of_node = dev->of_node;
rt9455_charger_config.drv_data = info;
rt9455_charger_config.supplied_to = rt9455_charger_supplied_to;
rt9455_charger_config.num_supplicants =
ARRAY_SIZE(rt9455_charger_supplied_to);
ret = devm_request_threaded_irq(dev, client->irq, NULL,
rt9455_irq_handler_thread,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
RT9455_DRIVER_NAME, info);
if (ret) {
dev_err(dev, "Failed to register IRQ handler\n");
goto put_usb_notifier;
}
ret = rt9455_hw_init(info, ichrg, ieoc_percentage, mivr, iaicr);
if (ret) {
dev_err(dev, "Failed to set charger to its default values\n");
goto put_usb_notifier;
}
info->charger = devm_power_supply_register(dev, &rt9455_charger_desc,
&rt9455_charger_config);
if (IS_ERR(info->charger)) {
dev_err(dev, "Failed to register charger\n");
ret = PTR_ERR(info->charger);
goto put_usb_notifier;
}
return 0;
put_usb_notifier:
#if IS_ENABLED(CONFIG_USB_PHY)
if (info->nb.notifier_call) {
usb_unregister_notifier(info->usb_phy, &info->nb);
info->nb.notifier_call = NULL;
}
#endif
return ret;
}
static void rt9455_remove(struct i2c_client *client)
{
int ret;
struct rt9455_info *info = i2c_get_clientdata(client);
ret = rt9455_register_reset(info);
if (ret)
dev_err(&info->client->dev, "Failed to set charger to its default values\n");
#if IS_ENABLED(CONFIG_USB_PHY)
if (info->nb.notifier_call)
usb_unregister_notifier(info->usb_phy, &info->nb);
#endif
cancel_delayed_work_sync(&info->pwr_rdy_work);
cancel_delayed_work_sync(&info->max_charging_time_work);
cancel_delayed_work_sync(&info->batt_presence_work);
}
static const struct i2c_device_id rt9455_i2c_id_table[] = {
{ RT9455_DRIVER_NAME, 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, rt9455_i2c_id_table);
static const struct of_device_id rt9455_of_match[] __maybe_unused = {
{ .compatible = "richtek,rt9455", },
{ },
};
MODULE_DEVICE_TABLE(of, rt9455_of_match);
#ifdef CONFIG_ACPI
static const struct acpi_device_id rt9455_i2c_acpi_match[] = {
{ "RT945500", 0 },
{ }
};
MODULE_DEVICE_TABLE(acpi, rt9455_i2c_acpi_match);
#endif
static struct i2c_driver rt9455_driver = {
.probe = rt9455_probe,
.remove = rt9455_remove,
.id_table = rt9455_i2c_id_table,
.driver = {
.name = RT9455_DRIVER_NAME,
.of_match_table = of_match_ptr(rt9455_of_match),
.acpi_match_table = ACPI_PTR(rt9455_i2c_acpi_match),
},
};
module_i2c_driver(rt9455_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Anda-Maria Nicolae <[email protected]>");
MODULE_DESCRIPTION("Richtek RT9455 Charger Driver");
| linux-master | drivers/power/supply/rt9455_charger.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* MP2629 battery charger driver
*
* Copyright 2020 Monolithic Power Systems, Inc
*
* Author: Saravanan Sekar <[email protected]>
*/
#include <linux/bits.h>
#include <linux/iio/consumer.h>
#include <linux/iio/types.h>
#include <linux/interrupt.h>
#include <linux/mfd/mp2629.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#define MP2629_REG_INPUT_ILIM 0x00
#define MP2629_REG_INPUT_VLIM 0x01
#define MP2629_REG_CHARGE_CTRL 0x04
#define MP2629_REG_CHARGE_ILIM 0x05
#define MP2629_REG_PRECHARGE 0x06
#define MP2629_REG_TERM_CURRENT 0x06
#define MP2629_REG_CHARGE_VLIM 0x07
#define MP2629_REG_TIMER_CTRL 0x08
#define MP2629_REG_IMPEDANCE_COMP 0x09
#define MP2629_REG_INTERRUPT 0x0b
#define MP2629_REG_STATUS 0x0c
#define MP2629_REG_FAULT 0x0d
#define MP2629_MASK_INPUT_TYPE GENMASK(7, 5)
#define MP2629_MASK_CHARGE_TYPE GENMASK(4, 3)
#define MP2629_MASK_CHARGE_CTRL GENMASK(5, 4)
#define MP2629_MASK_WDOG_CTRL GENMASK(5, 4)
#define MP2629_MASK_IMPEDANCE GENMASK(7, 4)
#define MP2629_INPUTSOURCE_CHANGE GENMASK(7, 5)
#define MP2629_CHARGING_CHANGE GENMASK(4, 3)
#define MP2629_FAULT_BATTERY BIT(3)
#define MP2629_FAULT_THERMAL BIT(4)
#define MP2629_FAULT_INPUT BIT(5)
#define MP2629_FAULT_OTG BIT(6)
#define MP2629_MAX_BATT_CAPACITY 100
#define MP2629_PROPS(_idx, _min, _max, _step) \
[_idx] = { \
.min = _min, \
.max = _max, \
.step = _step, \
}
enum mp2629_source_type {
MP2629_SOURCE_TYPE_NO_INPUT,
MP2629_SOURCE_TYPE_NON_STD,
MP2629_SOURCE_TYPE_SDP,
MP2629_SOURCE_TYPE_CDP,
MP2629_SOURCE_TYPE_DCP,
MP2629_SOURCE_TYPE_OTG = 7,
};
enum mp2629_field {
INPUT_ILIM,
INPUT_VLIM,
CHARGE_ILIM,
CHARGE_VLIM,
PRECHARGE,
TERM_CURRENT,
MP2629_MAX_FIELD
};
struct mp2629_charger {
struct device *dev;
int status;
int fault;
struct regmap *regmap;
struct regmap_field *regmap_fields[MP2629_MAX_FIELD];
struct mutex lock;
struct power_supply *usb;
struct power_supply *battery;
struct iio_channel *iiochan[MP2629_ADC_CHAN_END];
};
struct mp2629_prop {
int reg;
int mask;
int min;
int max;
int step;
int shift;
};
static enum power_supply_usb_type mp2629_usb_types[] = {
POWER_SUPPLY_USB_TYPE_SDP,
POWER_SUPPLY_USB_TYPE_DCP,
POWER_SUPPLY_USB_TYPE_CDP,
POWER_SUPPLY_USB_TYPE_PD_DRP,
POWER_SUPPLY_USB_TYPE_UNKNOWN
};
static enum power_supply_property mp2629_charger_usb_props[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_USB_TYPE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
};
static enum power_supply_property mp2629_charger_bat_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
};
static struct mp2629_prop props[] = {
MP2629_PROPS(INPUT_ILIM, 100000, 3250000, 50000),
MP2629_PROPS(INPUT_VLIM, 3800000, 5300000, 100000),
MP2629_PROPS(CHARGE_ILIM, 320000, 4520000, 40000),
MP2629_PROPS(CHARGE_VLIM, 3400000, 4670000, 10000),
MP2629_PROPS(PRECHARGE, 120000, 720000, 40000),
MP2629_PROPS(TERM_CURRENT, 80000, 680000, 40000),
};
static const struct reg_field mp2629_reg_fields[] = {
[INPUT_ILIM] = REG_FIELD(MP2629_REG_INPUT_ILIM, 0, 5),
[INPUT_VLIM] = REG_FIELD(MP2629_REG_INPUT_VLIM, 0, 3),
[CHARGE_ILIM] = REG_FIELD(MP2629_REG_CHARGE_ILIM, 0, 6),
[CHARGE_VLIM] = REG_FIELD(MP2629_REG_CHARGE_VLIM, 1, 7),
[PRECHARGE] = REG_FIELD(MP2629_REG_PRECHARGE, 4, 7),
[TERM_CURRENT] = REG_FIELD(MP2629_REG_TERM_CURRENT, 0, 3),
};
static char *adc_chan_name[] = {
"mp2629-batt-volt",
"mp2629-system-volt",
"mp2629-input-volt",
"mp2629-batt-current",
"mp2629-input-current",
};
static int mp2629_read_adc(struct mp2629_charger *charger,
enum mp2629_adc_chan ch,
union power_supply_propval *val)
{
int ret;
int chval;
ret = iio_read_channel_processed(charger->iiochan[ch], &chval);
if (ret)
return ret;
val->intval = chval * 1000;
return 0;
}
static int mp2629_get_prop(struct mp2629_charger *charger,
enum mp2629_field fld,
union power_supply_propval *val)
{
int ret;
unsigned int rval;
ret = regmap_field_read(charger->regmap_fields[fld], &rval);
if (ret)
return ret;
val->intval = rval * props[fld].step + props[fld].min;
return 0;
}
static int mp2629_set_prop(struct mp2629_charger *charger,
enum mp2629_field fld,
const union power_supply_propval *val)
{
unsigned int rval;
if (val->intval < props[fld].min || val->intval > props[fld].max)
return -EINVAL;
rval = (val->intval - props[fld].min) / props[fld].step;
return regmap_field_write(charger->regmap_fields[fld], rval);
}
static int mp2629_get_battery_capacity(struct mp2629_charger *charger,
union power_supply_propval *val)
{
union power_supply_propval vnow, vlim;
int ret;
ret = mp2629_read_adc(charger, MP2629_BATT_VOLT, &vnow);
if (ret)
return ret;
ret = mp2629_get_prop(charger, CHARGE_VLIM, &vlim);
if (ret)
return ret;
val->intval = (vnow.intval * 100) / vlim.intval;
val->intval = min(val->intval, MP2629_MAX_BATT_CAPACITY);
return 0;
}
static int mp2629_charger_battery_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
unsigned int rval;
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = mp2629_read_adc(charger, MP2629_BATT_VOLT, val);
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = mp2629_read_adc(charger, MP2629_BATT_CURRENT, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
val->intval = 4520000;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
val->intval = 4670000;
break;
case POWER_SUPPLY_PROP_CAPACITY:
ret = mp2629_get_battery_capacity(charger, val);
break;
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
ret = mp2629_get_prop(charger, TERM_CURRENT, val);
break;
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
ret = mp2629_get_prop(charger, PRECHARGE, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = mp2629_get_prop(charger, CHARGE_VLIM, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = mp2629_get_prop(charger, CHARGE_ILIM, val);
break;
case POWER_SUPPLY_PROP_HEALTH:
if (!charger->fault)
val->intval = POWER_SUPPLY_HEALTH_GOOD;
if (MP2629_FAULT_BATTERY & charger->fault)
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
else if (MP2629_FAULT_THERMAL & charger->fault)
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
else if (MP2629_FAULT_INPUT & charger->fault)
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
break;
case POWER_SUPPLY_PROP_STATUS:
ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
if (ret)
break;
rval = (rval & MP2629_MASK_CHARGE_TYPE) >> 3;
switch (rval) {
case 0x00:
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
break;
case 0x01:
case 0x10:
val->intval = POWER_SUPPLY_STATUS_CHARGING;
break;
case 0x11:
val->intval = POWER_SUPPLY_STATUS_FULL;
}
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
if (ret)
break;
rval = (rval & MP2629_MASK_CHARGE_TYPE) >> 3;
switch (rval) {
case 0x00:
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
case 0x01:
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
case 0x10:
val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
break;
default:
val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
}
break;
default:
return -EINVAL;
}
return ret;
}
static int mp2629_charger_battery_set_prop(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return mp2629_set_prop(charger, TERM_CURRENT, val);
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
return mp2629_set_prop(charger, PRECHARGE, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
return mp2629_set_prop(charger, CHARGE_VLIM, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
return mp2629_set_prop(charger, CHARGE_ILIM, val);
default:
return -EINVAL;
}
}
static int mp2629_charger_usb_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
unsigned int rval;
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
if (ret)
break;
val->intval = !!(rval & MP2629_MASK_INPUT_TYPE);
break;
case POWER_SUPPLY_PROP_USB_TYPE:
ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
if (ret)
break;
rval = (rval & MP2629_MASK_INPUT_TYPE) >> 5;
switch (rval) {
case MP2629_SOURCE_TYPE_SDP:
val->intval = POWER_SUPPLY_USB_TYPE_SDP;
break;
case MP2629_SOURCE_TYPE_CDP:
val->intval = POWER_SUPPLY_USB_TYPE_CDP;
break;
case MP2629_SOURCE_TYPE_DCP:
val->intval = POWER_SUPPLY_USB_TYPE_DCP;
break;
case MP2629_SOURCE_TYPE_OTG:
val->intval = POWER_SUPPLY_USB_TYPE_PD_DRP;
break;
default:
val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
break;
}
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = mp2629_read_adc(charger, MP2629_INPUT_VOLT, val);
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = mp2629_read_adc(charger, MP2629_INPUT_CURRENT, val);
break;
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
ret = mp2629_get_prop(charger, INPUT_VLIM, val);
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = mp2629_get_prop(charger, INPUT_ILIM, val);
break;
default:
return -EINVAL;
}
return ret;
}
static int mp2629_charger_usb_set_prop(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
switch (psp) {
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
return mp2629_set_prop(charger, INPUT_VLIM, val);
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return mp2629_set_prop(charger, INPUT_ILIM, val);
default:
return -EINVAL;
}
}
static int mp2629_charger_battery_prop_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
return (psp == POWER_SUPPLY_PROP_PRECHARGE_CURRENT) ||
(psp == POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT) ||
(psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT) ||
(psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE);
}
static int mp2629_charger_usb_prop_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
return (psp == POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT) ||
(psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT);
}
static irqreturn_t mp2629_irq_handler(int irq, void *dev_id)
{
struct mp2629_charger *charger = dev_id;
unsigned int rval;
int ret;
mutex_lock(&charger->lock);
ret = regmap_read(charger->regmap, MP2629_REG_FAULT, &rval);
if (ret)
goto unlock;
if (rval) {
charger->fault = rval;
if (MP2629_FAULT_BATTERY & rval)
dev_err(charger->dev, "Battery fault OVP\n");
else if (MP2629_FAULT_THERMAL & rval)
dev_err(charger->dev, "Thermal shutdown fault\n");
else if (MP2629_FAULT_INPUT & rval)
dev_err(charger->dev, "no input or input OVP\n");
else if (MP2629_FAULT_OTG & rval)
dev_err(charger->dev, "VIN overloaded\n");
goto unlock;
}
ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
if (ret)
goto unlock;
if (rval & MP2629_INPUTSOURCE_CHANGE)
power_supply_changed(charger->usb);
else if (rval & MP2629_CHARGING_CHANGE)
power_supply_changed(charger->battery);
unlock:
mutex_unlock(&charger->lock);
return IRQ_HANDLED;
}
static const struct power_supply_desc mp2629_usb_desc = {
.name = "mp2629_usb",
.type = POWER_SUPPLY_TYPE_USB,
.usb_types = mp2629_usb_types,
.num_usb_types = ARRAY_SIZE(mp2629_usb_types),
.properties = mp2629_charger_usb_props,
.num_properties = ARRAY_SIZE(mp2629_charger_usb_props),
.get_property = mp2629_charger_usb_get_prop,
.set_property = mp2629_charger_usb_set_prop,
.property_is_writeable = mp2629_charger_usb_prop_writeable,
};
static const struct power_supply_desc mp2629_battery_desc = {
.name = "mp2629_battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = mp2629_charger_bat_props,
.num_properties = ARRAY_SIZE(mp2629_charger_bat_props),
.get_property = mp2629_charger_battery_get_prop,
.set_property = mp2629_charger_battery_set_prop,
.property_is_writeable = mp2629_charger_battery_prop_writeable,
};
static ssize_t batt_impedance_compensation_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct mp2629_charger *charger = dev_get_drvdata(dev->parent);
unsigned int rval;
int ret;
ret = regmap_read(charger->regmap, MP2629_REG_IMPEDANCE_COMP, &rval);
if (ret)
return ret;
rval = (rval >> 4) * 10;
return sysfs_emit(buf, "%d mohm\n", rval);
}
static ssize_t batt_impedance_compensation_store(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
struct mp2629_charger *charger = dev_get_drvdata(dev->parent);
unsigned int val;
int ret;
ret = kstrtouint(buf, 10, &val);
if (ret)
return ret;
if (val > 140)
return -ERANGE;
/* multiples of 10 mohm so round off */
val = val / 10;
ret = regmap_update_bits(charger->regmap, MP2629_REG_IMPEDANCE_COMP,
MP2629_MASK_IMPEDANCE, val << 4);
if (ret)
return ret;
return count;
}
static DEVICE_ATTR_RW(batt_impedance_compensation);
static struct attribute *mp2629_charger_sysfs_attrs[] = {
&dev_attr_batt_impedance_compensation.attr,
NULL
};
ATTRIBUTE_GROUPS(mp2629_charger_sysfs);
static void mp2629_charger_disable(void *data)
{
struct mp2629_charger *charger = data;
regmap_update_bits(charger->regmap, MP2629_REG_CHARGE_CTRL,
MP2629_MASK_CHARGE_CTRL, 0);
}
static int mp2629_charger_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct mp2629_data *ddata = dev_get_drvdata(dev->parent);
struct mp2629_charger *charger;
struct power_supply_config psy_cfg = {};
int ret, i, irq;
charger = devm_kzalloc(dev, sizeof(*charger), GFP_KERNEL);
if (!charger)
return -ENOMEM;
charger->regmap = ddata->regmap;
charger->dev = dev;
platform_set_drvdata(pdev, charger);
irq = platform_get_irq(to_platform_device(dev->parent), 0);
if (irq < 0)
return irq;
for (i = 0; i < MP2629_MAX_FIELD; i++) {
charger->regmap_fields[i] = devm_regmap_field_alloc(dev,
charger->regmap, mp2629_reg_fields[i]);
if (IS_ERR(charger->regmap_fields[i])) {
dev_err(dev, "regmap field alloc fail %d\n", i);
return PTR_ERR(charger->regmap_fields[i]);
}
}
for (i = 0; i < MP2629_ADC_CHAN_END; i++) {
charger->iiochan[i] = devm_iio_channel_get(dev,
adc_chan_name[i]);
if (IS_ERR(charger->iiochan[i])) {
dev_err(dev, "iio chan get %s err\n", adc_chan_name[i]);
return PTR_ERR(charger->iiochan[i]);
}
}
ret = devm_add_action_or_reset(dev, mp2629_charger_disable, charger);
if (ret)
return ret;
charger->usb = devm_power_supply_register(dev, &mp2629_usb_desc, NULL);
if (IS_ERR(charger->usb)) {
dev_err(dev, "power supply register usb failed\n");
return PTR_ERR(charger->usb);
}
psy_cfg.drv_data = charger;
psy_cfg.attr_grp = mp2629_charger_sysfs_groups;
charger->battery = devm_power_supply_register(dev,
&mp2629_battery_desc, &psy_cfg);
if (IS_ERR(charger->battery)) {
dev_err(dev, "power supply register battery failed\n");
return PTR_ERR(charger->battery);
}
ret = regmap_update_bits(charger->regmap, MP2629_REG_CHARGE_CTRL,
MP2629_MASK_CHARGE_CTRL, BIT(4));
if (ret) {
dev_err(dev, "enable charge fail: %d\n", ret);
return ret;
}
regmap_update_bits(charger->regmap, MP2629_REG_TIMER_CTRL,
MP2629_MASK_WDOG_CTRL, 0);
mutex_init(&charger->lock);
ret = devm_request_threaded_irq(dev, irq, NULL, mp2629_irq_handler,
IRQF_ONESHOT | IRQF_TRIGGER_RISING,
"mp2629-charger", charger);
if (ret) {
dev_err(dev, "failed to request gpio IRQ\n");
return ret;
}
regmap_update_bits(charger->regmap, MP2629_REG_INTERRUPT,
GENMASK(6, 5), BIT(6) | BIT(5));
return 0;
}
static const struct of_device_id mp2629_charger_of_match[] = {
{ .compatible = "mps,mp2629_charger"},
{}
};
MODULE_DEVICE_TABLE(of, mp2629_charger_of_match);
static struct platform_driver mp2629_charger_driver = {
.driver = {
.name = "mp2629_charger",
.of_match_table = mp2629_charger_of_match,
},
.probe = mp2629_charger_probe,
};
module_platform_driver(mp2629_charger_driver);
MODULE_AUTHOR("Saravanan Sekar <[email protected]>");
MODULE_DESCRIPTION("MP2629 Charger driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/mp2629_charger.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2010, Lars-Peter Clausen <[email protected]>
* Driver for chargers which report their online status through a GPIO pin
*/
#include <linux/device.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/gpio/consumer.h>
#include <linux/power/gpio-charger.h>
struct gpio_mapping {
u32 limit_ua;
u32 gpiodata;
} __packed;
struct gpio_charger {
struct device *dev;
unsigned int irq;
unsigned int charge_status_irq;
bool wakeup_enabled;
struct power_supply *charger;
struct power_supply_desc charger_desc;
struct gpio_desc *gpiod;
struct gpio_desc *charge_status;
struct gpio_descs *current_limit_gpios;
struct gpio_mapping *current_limit_map;
u32 current_limit_map_size;
u32 charge_current_limit;
};
static irqreturn_t gpio_charger_irq(int irq, void *devid)
{
struct power_supply *charger = devid;
power_supply_changed(charger);
return IRQ_HANDLED;
}
static inline struct gpio_charger *psy_to_gpio_charger(struct power_supply *psy)
{
return power_supply_get_drvdata(psy);
}
static int set_charge_current_limit(struct gpio_charger *gpio_charger, int val)
{
struct gpio_mapping mapping;
int ndescs = gpio_charger->current_limit_gpios->ndescs;
struct gpio_desc **gpios = gpio_charger->current_limit_gpios->desc;
int i;
if (!gpio_charger->current_limit_map_size)
return -EINVAL;
for (i = 0; i < gpio_charger->current_limit_map_size; i++) {
if (gpio_charger->current_limit_map[i].limit_ua <= val)
break;
}
mapping = gpio_charger->current_limit_map[i];
for (i = 0; i < ndescs; i++) {
bool val = (mapping.gpiodata >> i) & 1;
gpiod_set_value_cansleep(gpios[ndescs-i-1], val);
}
gpio_charger->charge_current_limit = mapping.limit_ua;
dev_dbg(gpio_charger->dev, "set charge current limit to %d (requested: %d)\n",
gpio_charger->charge_current_limit, val);
return 0;
}
static int gpio_charger_get_property(struct power_supply *psy,
enum power_supply_property psp, union power_supply_propval *val)
{
struct gpio_charger *gpio_charger = psy_to_gpio_charger(psy);
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = gpiod_get_value_cansleep(gpio_charger->gpiod);
break;
case POWER_SUPPLY_PROP_STATUS:
if (gpiod_get_value_cansleep(gpio_charger->charge_status))
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
val->intval = gpio_charger->charge_current_limit;
break;
default:
return -EINVAL;
}
return 0;
}
static int gpio_charger_set_property(struct power_supply *psy,
enum power_supply_property psp, const union power_supply_propval *val)
{
struct gpio_charger *gpio_charger = psy_to_gpio_charger(psy);
switch (psp) {
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
return set_charge_current_limit(gpio_charger, val->intval);
default:
return -EINVAL;
}
return 0;
}
static int gpio_charger_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
return 1;
default:
break;
}
return 0;
}
static enum power_supply_type gpio_charger_get_type(struct device *dev)
{
const char *chargetype;
if (!device_property_read_string(dev, "charger-type", &chargetype)) {
if (!strcmp("unknown", chargetype))
return POWER_SUPPLY_TYPE_UNKNOWN;
if (!strcmp("battery", chargetype))
return POWER_SUPPLY_TYPE_BATTERY;
if (!strcmp("ups", chargetype))
return POWER_SUPPLY_TYPE_UPS;
if (!strcmp("mains", chargetype))
return POWER_SUPPLY_TYPE_MAINS;
if (!strcmp("usb-sdp", chargetype))
return POWER_SUPPLY_TYPE_USB;
if (!strcmp("usb-dcp", chargetype))
return POWER_SUPPLY_TYPE_USB;
if (!strcmp("usb-cdp", chargetype))
return POWER_SUPPLY_TYPE_USB;
if (!strcmp("usb-aca", chargetype))
return POWER_SUPPLY_TYPE_USB;
}
dev_warn(dev, "unknown charger type %s\n", chargetype);
return POWER_SUPPLY_TYPE_UNKNOWN;
}
static int gpio_charger_get_irq(struct device *dev, void *dev_id,
struct gpio_desc *gpio)
{
int ret, irq = gpiod_to_irq(gpio);
if (irq > 0) {
ret = devm_request_any_context_irq(dev, irq, gpio_charger_irq,
IRQF_TRIGGER_RISING |
IRQF_TRIGGER_FALLING,
dev_name(dev),
dev_id);
if (ret < 0) {
dev_warn(dev, "Failed to request irq: %d\n", ret);
irq = 0;
}
}
return irq;
}
static int init_charge_current_limit(struct device *dev,
struct gpio_charger *gpio_charger)
{
int i, len;
u32 cur_limit = U32_MAX;
gpio_charger->current_limit_gpios = devm_gpiod_get_array_optional(dev,
"charge-current-limit", GPIOD_OUT_LOW);
if (IS_ERR(gpio_charger->current_limit_gpios)) {
dev_err(dev, "error getting current-limit GPIOs\n");
return PTR_ERR(gpio_charger->current_limit_gpios);
}
if (!gpio_charger->current_limit_gpios)
return 0;
len = device_property_read_u32_array(dev, "charge-current-limit-mapping",
NULL, 0);
if (len < 0)
return len;
if (len == 0 || len % 2) {
dev_err(dev, "invalid charge-current-limit-mapping length\n");
return -EINVAL;
}
gpio_charger->current_limit_map = devm_kmalloc_array(dev,
len / 2, sizeof(*gpio_charger->current_limit_map), GFP_KERNEL);
if (!gpio_charger->current_limit_map)
return -ENOMEM;
gpio_charger->current_limit_map_size = len / 2;
len = device_property_read_u32_array(dev, "charge-current-limit-mapping",
(u32*) gpio_charger->current_limit_map, len);
if (len < 0)
return len;
for (i=0; i < gpio_charger->current_limit_map_size; i++) {
if (gpio_charger->current_limit_map[i].limit_ua > cur_limit) {
dev_err(dev, "charge-current-limit-mapping not sorted by current in descending order\n");
return -EINVAL;
}
cur_limit = gpio_charger->current_limit_map[i].limit_ua;
}
/* default to smallest current limitation for safety reasons */
len = gpio_charger->current_limit_map_size - 1;
set_charge_current_limit(gpio_charger,
gpio_charger->current_limit_map[len].limit_ua);
return 0;
}
/*
* The entries will be overwritten by driver's probe routine depending
* on the available features. This list ensures, that the array is big
* enough for all optional features.
*/
static enum power_supply_property gpio_charger_properties[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
};
static int gpio_charger_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
const struct gpio_charger_platform_data *pdata = dev->platform_data;
struct power_supply_config psy_cfg = {};
struct gpio_charger *gpio_charger;
struct power_supply_desc *charger_desc;
struct gpio_desc *charge_status;
int charge_status_irq;
int ret;
int num_props = 0;
if (!pdata && !dev->of_node) {
dev_err(dev, "No platform data\n");
return -ENOENT;
}
gpio_charger = devm_kzalloc(dev, sizeof(*gpio_charger), GFP_KERNEL);
if (!gpio_charger)
return -ENOMEM;
gpio_charger->dev = dev;
/*
* This will fetch a GPIO descriptor from device tree, ACPI or
* boardfile descriptor tables. It's good to try this first.
*/
gpio_charger->gpiod = devm_gpiod_get_optional(dev, NULL, GPIOD_IN);
if (IS_ERR(gpio_charger->gpiod)) {
/* Just try again if this happens */
return dev_err_probe(dev, PTR_ERR(gpio_charger->gpiod),
"error getting GPIO descriptor\n");
}
if (gpio_charger->gpiod) {
gpio_charger_properties[num_props] = POWER_SUPPLY_PROP_ONLINE;
num_props++;
}
charge_status = devm_gpiod_get_optional(dev, "charge-status", GPIOD_IN);
if (IS_ERR(charge_status))
return PTR_ERR(charge_status);
if (charge_status) {
gpio_charger->charge_status = charge_status;
gpio_charger_properties[num_props] = POWER_SUPPLY_PROP_STATUS;
num_props++;
}
ret = init_charge_current_limit(dev, gpio_charger);
if (ret < 0)
return ret;
if (gpio_charger->current_limit_map) {
gpio_charger_properties[num_props] =
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX;
num_props++;
}
charger_desc = &gpio_charger->charger_desc;
charger_desc->properties = gpio_charger_properties;
charger_desc->num_properties = num_props;
charger_desc->get_property = gpio_charger_get_property;
charger_desc->set_property = gpio_charger_set_property;
charger_desc->property_is_writeable =
gpio_charger_property_is_writeable;
psy_cfg.of_node = dev->of_node;
psy_cfg.drv_data = gpio_charger;
if (pdata) {
charger_desc->name = pdata->name;
charger_desc->type = pdata->type;
psy_cfg.supplied_to = pdata->supplied_to;
psy_cfg.num_supplicants = pdata->num_supplicants;
} else {
charger_desc->name = dev->of_node->name;
charger_desc->type = gpio_charger_get_type(dev);
}
if (!charger_desc->name)
charger_desc->name = pdev->name;
gpio_charger->charger = devm_power_supply_register(dev, charger_desc,
&psy_cfg);
if (IS_ERR(gpio_charger->charger)) {
ret = PTR_ERR(gpio_charger->charger);
dev_err(dev, "Failed to register power supply: %d\n", ret);
return ret;
}
gpio_charger->irq = gpio_charger_get_irq(dev, gpio_charger->charger,
gpio_charger->gpiod);
charge_status_irq = gpio_charger_get_irq(dev, gpio_charger->charger,
gpio_charger->charge_status);
gpio_charger->charge_status_irq = charge_status_irq;
platform_set_drvdata(pdev, gpio_charger);
device_init_wakeup(dev, 1);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int gpio_charger_suspend(struct device *dev)
{
struct gpio_charger *gpio_charger = dev_get_drvdata(dev);
if (device_may_wakeup(dev))
gpio_charger->wakeup_enabled =
!enable_irq_wake(gpio_charger->irq);
return 0;
}
static int gpio_charger_resume(struct device *dev)
{
struct gpio_charger *gpio_charger = dev_get_drvdata(dev);
if (device_may_wakeup(dev) && gpio_charger->wakeup_enabled)
disable_irq_wake(gpio_charger->irq);
power_supply_changed(gpio_charger->charger);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(gpio_charger_pm_ops,
gpio_charger_suspend, gpio_charger_resume);
static const struct of_device_id gpio_charger_match[] = {
{ .compatible = "gpio-charger" },
{ }
};
MODULE_DEVICE_TABLE(of, gpio_charger_match);
static struct platform_driver gpio_charger_driver = {
.probe = gpio_charger_probe,
.driver = {
.name = "gpio-charger",
.pm = &gpio_charger_pm_ops,
.of_match_table = gpio_charger_match,
},
};
module_platform_driver(gpio_charger_driver);
MODULE_AUTHOR("Lars-Peter Clausen <[email protected]>");
MODULE_DESCRIPTION("Driver for chargers only communicating via GPIO(s)");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:gpio-charger");
| linux-master | drivers/power/supply/gpio-charger.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* I2C client/driver for the Linear Technology LTC2941, LTC2942, LTC2943
* and LTC2944 Battery Gas Gauge IC
*
* Copyright (C) 2014 Topic Embedded Systems
*
* Author: Auryn Verwegen
* Author: Mike Looijmans
*/
#include <linux/devm-helpers.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/swab.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
#define I16_MSB(x) ((x >> 8) & 0xFF)
#define I16_LSB(x) (x & 0xFF)
#define LTC294X_WORK_DELAY 10 /* Update delay in seconds */
#define LTC294X_MAX_VALUE 0xFFFF
#define LTC294X_MID_SUPPLY 0x7FFF
#define LTC2941_MAX_PRESCALER_EXP 7
#define LTC2943_MAX_PRESCALER_EXP 6
enum ltc294x_reg {
LTC294X_REG_STATUS = 0x00,
LTC294X_REG_CONTROL = 0x01,
LTC294X_REG_ACC_CHARGE_MSB = 0x02,
LTC294X_REG_ACC_CHARGE_LSB = 0x03,
LTC294X_REG_CHARGE_THR_HIGH_MSB = 0x04,
LTC294X_REG_CHARGE_THR_HIGH_LSB = 0x05,
LTC294X_REG_CHARGE_THR_LOW_MSB = 0x06,
LTC294X_REG_CHARGE_THR_LOW_LSB = 0x07,
LTC294X_REG_VOLTAGE_MSB = 0x08,
LTC294X_REG_VOLTAGE_LSB = 0x09,
LTC2942_REG_TEMPERATURE_MSB = 0x0C,
LTC2942_REG_TEMPERATURE_LSB = 0x0D,
LTC2943_REG_CURRENT_MSB = 0x0E,
LTC2943_REG_CURRENT_LSB = 0x0F,
LTC2943_REG_TEMPERATURE_MSB = 0x14,
LTC2943_REG_TEMPERATURE_LSB = 0x15,
};
enum ltc294x_id {
LTC2941_ID,
LTC2942_ID,
LTC2943_ID,
LTC2944_ID,
};
#define LTC2941_REG_STATUS_CHIP_ID BIT(7)
#define LTC2942_REG_CONTROL_MODE_SCAN (BIT(7) | BIT(6))
#define LTC2943_REG_CONTROL_MODE_SCAN BIT(7)
#define LTC294X_REG_CONTROL_PRESCALER_MASK (BIT(5) | BIT(4) | BIT(3))
#define LTC294X_REG_CONTROL_SHUTDOWN_MASK (BIT(0))
#define LTC294X_REG_CONTROL_PRESCALER_SET(x) \
((x << 3) & LTC294X_REG_CONTROL_PRESCALER_MASK)
#define LTC294X_REG_CONTROL_ALCC_CONFIG_DISABLED 0
#define LTC294X_REG_CONTROL_ADC_DISABLE(x) ((x) & ~(BIT(7) | BIT(6)))
struct ltc294x_info {
struct i2c_client *client; /* I2C Client pointer */
struct power_supply *supply; /* Supply pointer */
struct power_supply_desc supply_desc; /* Supply description */
struct delayed_work work; /* Work scheduler */
enum ltc294x_id id; /* Chip type */
int charge; /* Last charge register content */
int r_sense; /* mOhm */
int Qlsb; /* nAh */
};
static inline int convert_bin_to_uAh(
const struct ltc294x_info *info, int Q)
{
return ((Q * (info->Qlsb / 10))) / 100;
}
static inline int convert_uAh_to_bin(
const struct ltc294x_info *info, int uAh)
{
int Q;
Q = (uAh * 100) / (info->Qlsb/10);
return (Q < LTC294X_MAX_VALUE) ? Q : LTC294X_MAX_VALUE;
}
static int ltc294x_read_regs(struct i2c_client *client,
enum ltc294x_reg reg, u8 *buf, int num_regs)
{
int ret;
struct i2c_msg msgs[2] = { };
u8 reg_start = reg;
msgs[0].addr = client->addr;
msgs[0].len = 1;
msgs[0].buf = ®_start;
msgs[1].addr = client->addr;
msgs[1].len = num_regs;
msgs[1].buf = buf;
msgs[1].flags = I2C_M_RD;
ret = i2c_transfer(client->adapter, &msgs[0], 2);
if (ret < 0) {
dev_err(&client->dev, "ltc2941 read_reg(0x%x[%d]) failed: %pe\n",
reg, num_regs, ERR_PTR(ret));
return ret;
}
dev_dbg(&client->dev, "%s (%#x, %d) -> %#x\n",
__func__, reg, num_regs, *buf);
return 0;
}
static int ltc294x_write_regs(struct i2c_client *client,
enum ltc294x_reg reg, const u8 *buf, int num_regs)
{
int ret;
u8 reg_start = reg;
ret = i2c_smbus_write_i2c_block_data(client, reg_start, num_regs, buf);
if (ret < 0) {
dev_err(&client->dev, "ltc2941 write_reg(0x%x[%d]) failed: %pe\n",
reg, num_regs, ERR_PTR(ret));
return ret;
}
dev_dbg(&client->dev, "%s (%#x, %d) -> %#x\n",
__func__, reg, num_regs, *buf);
return 0;
}
static int ltc294x_reset(const struct ltc294x_info *info, int prescaler_exp)
{
int ret;
u8 value;
u8 control;
/* Read status and control registers */
ret = ltc294x_read_regs(info->client, LTC294X_REG_CONTROL, &value, 1);
if (ret < 0)
return ret;
control = LTC294X_REG_CONTROL_PRESCALER_SET(prescaler_exp) |
LTC294X_REG_CONTROL_ALCC_CONFIG_DISABLED;
/* Put device into "monitor" mode */
switch (info->id) {
case LTC2942_ID: /* 2942 measures every 2 sec */
control |= LTC2942_REG_CONTROL_MODE_SCAN;
break;
case LTC2943_ID:
case LTC2944_ID: /* 2943 and 2944 measure every 10 sec */
control |= LTC2943_REG_CONTROL_MODE_SCAN;
break;
default:
break;
}
if (value != control) {
ret = ltc294x_write_regs(info->client,
LTC294X_REG_CONTROL, &control, 1);
if (ret < 0)
return ret;
}
return 0;
}
static int ltc294x_read_charge_register(const struct ltc294x_info *info,
enum ltc294x_reg reg)
{
int ret;
u8 datar[2];
ret = ltc294x_read_regs(info->client, reg, &datar[0], 2);
if (ret < 0)
return ret;
return (datar[0] << 8) + datar[1];
}
static int ltc294x_get_charge(const struct ltc294x_info *info,
enum ltc294x_reg reg, int *val)
{
int value = ltc294x_read_charge_register(info, reg);
if (value < 0)
return value;
/* When r_sense < 0, this counts up when the battery discharges */
if (info->Qlsb < 0)
value -= 0xFFFF;
*val = convert_bin_to_uAh(info, value);
return 0;
}
static int ltc294x_set_charge_now(const struct ltc294x_info *info, int val)
{
int ret;
u8 dataw[2];
u8 ctrl_reg;
s32 value;
value = convert_uAh_to_bin(info, val);
/* Direction depends on how sense+/- were connected */
if (info->Qlsb < 0)
value += 0xFFFF;
if ((value < 0) || (value > 0xFFFF)) /* input validation */
return -EINVAL;
/* Read control register */
ret = ltc294x_read_regs(info->client,
LTC294X_REG_CONTROL, &ctrl_reg, 1);
if (ret < 0)
return ret;
/* Disable analog section */
ctrl_reg |= LTC294X_REG_CONTROL_SHUTDOWN_MASK;
ret = ltc294x_write_regs(info->client,
LTC294X_REG_CONTROL, &ctrl_reg, 1);
if (ret < 0)
return ret;
/* Set new charge value */
dataw[0] = I16_MSB(value);
dataw[1] = I16_LSB(value);
ret = ltc294x_write_regs(info->client,
LTC294X_REG_ACC_CHARGE_MSB, &dataw[0], 2);
if (ret < 0)
goto error_exit;
/* Enable analog section */
error_exit:
ctrl_reg &= ~LTC294X_REG_CONTROL_SHUTDOWN_MASK;
ret = ltc294x_write_regs(info->client,
LTC294X_REG_CONTROL, &ctrl_reg, 1);
return ret < 0 ? ret : 0;
}
static int ltc294x_set_charge_thr(const struct ltc294x_info *info,
enum ltc294x_reg reg, int val)
{
u8 dataw[2];
s32 value;
value = convert_uAh_to_bin(info, val);
/* Direction depends on how sense+/- were connected */
if (info->Qlsb < 0)
value += 0xFFFF;
if ((value < 0) || (value > 0xFFFF)) /* input validation */
return -EINVAL;
/* Set new charge value */
dataw[0] = I16_MSB(value);
dataw[1] = I16_LSB(value);
return ltc294x_write_regs(info->client, reg, &dataw[0], 2);
}
static int ltc294x_get_charge_counter(
const struct ltc294x_info *info, int *val)
{
int value = ltc294x_read_charge_register(info, LTC294X_REG_ACC_CHARGE_MSB);
if (value < 0)
return value;
value -= LTC294X_MID_SUPPLY;
*val = convert_bin_to_uAh(info, value);
return 0;
}
static int ltc294x_get_voltage(const struct ltc294x_info *info, int *val)
{
int ret;
u8 datar[2];
u32 value;
ret = ltc294x_read_regs(info->client,
LTC294X_REG_VOLTAGE_MSB, &datar[0], 2);
value = (datar[0] << 8) | datar[1];
switch (info->id) {
case LTC2943_ID:
value *= 23600 * 2;
value /= 0xFFFF;
value *= 1000 / 2;
break;
case LTC2944_ID:
value *= 70800 / 5*4;
value /= 0xFFFF;
value *= 1000 * 5/4;
break;
default:
value *= 6000 * 10;
value /= 0xFFFF;
value *= 1000 / 10;
break;
}
*val = value;
return ret;
}
static int ltc294x_get_current(const struct ltc294x_info *info, int *val)
{
int ret;
u8 datar[2];
s32 value;
ret = ltc294x_read_regs(info->client,
LTC2943_REG_CURRENT_MSB, &datar[0], 2);
value = (datar[0] << 8) | datar[1];
value -= 0x7FFF;
if (info->id == LTC2944_ID)
value *= 64000;
else
value *= 60000;
/* Value is in range -32k..+32k, r_sense is usually 10..50 mOhm,
* the formula below keeps everything in s32 range while preserving
* enough digits */
*val = 1000 * (value / (info->r_sense * 0x7FFF)); /* in uA */
return ret;
}
static int ltc294x_get_temperature(const struct ltc294x_info *info, int *val)
{
enum ltc294x_reg reg;
int ret;
u8 datar[2];
u32 value;
if (info->id == LTC2942_ID) {
reg = LTC2942_REG_TEMPERATURE_MSB;
value = 6000; /* Full-scale is 600 Kelvin */
} else {
reg = LTC2943_REG_TEMPERATURE_MSB;
value = 5100; /* Full-scale is 510 Kelvin */
}
ret = ltc294x_read_regs(info->client, reg, &datar[0], 2);
value *= (datar[0] << 8) | datar[1];
/* Convert to tenths of degree Celsius */
*val = value / 0xFFFF - 2722;
return ret;
}
static int ltc294x_get_property(struct power_supply *psy,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct ltc294x_info *info = power_supply_get_drvdata(psy);
switch (prop) {
case POWER_SUPPLY_PROP_CHARGE_FULL:
return ltc294x_get_charge(info, LTC294X_REG_CHARGE_THR_HIGH_MSB,
&val->intval);
case POWER_SUPPLY_PROP_CHARGE_EMPTY:
return ltc294x_get_charge(info, LTC294X_REG_CHARGE_THR_LOW_MSB,
&val->intval);
case POWER_SUPPLY_PROP_CHARGE_NOW:
return ltc294x_get_charge(info, LTC294X_REG_ACC_CHARGE_MSB,
&val->intval);
case POWER_SUPPLY_PROP_CHARGE_COUNTER:
return ltc294x_get_charge_counter(info, &val->intval);
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
return ltc294x_get_voltage(info, &val->intval);
case POWER_SUPPLY_PROP_CURRENT_NOW:
return ltc294x_get_current(info, &val->intval);
case POWER_SUPPLY_PROP_TEMP:
return ltc294x_get_temperature(info, &val->intval);
default:
return -EINVAL;
}
}
static int ltc294x_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct ltc294x_info *info = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_FULL:
return ltc294x_set_charge_thr(info,
LTC294X_REG_CHARGE_THR_HIGH_MSB, val->intval);
case POWER_SUPPLY_PROP_CHARGE_EMPTY:
return ltc294x_set_charge_thr(info,
LTC294X_REG_CHARGE_THR_LOW_MSB, val->intval);
case POWER_SUPPLY_PROP_CHARGE_NOW:
return ltc294x_set_charge_now(info, val->intval);
default:
return -EPERM;
}
}
static int ltc294x_property_is_writeable(
struct power_supply *psy, enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_FULL:
case POWER_SUPPLY_PROP_CHARGE_EMPTY:
case POWER_SUPPLY_PROP_CHARGE_NOW:
return 1;
default:
return 0;
}
}
static void ltc294x_update(struct ltc294x_info *info)
{
int charge = ltc294x_read_charge_register(info, LTC294X_REG_ACC_CHARGE_MSB);
if (charge != info->charge) {
info->charge = charge;
power_supply_changed(info->supply);
}
}
static void ltc294x_work(struct work_struct *work)
{
struct ltc294x_info *info;
info = container_of(work, struct ltc294x_info, work.work);
ltc294x_update(info);
schedule_delayed_work(&info->work, LTC294X_WORK_DELAY * HZ);
}
static enum power_supply_property ltc294x_properties[] = {
POWER_SUPPLY_PROP_CHARGE_COUNTER,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_EMPTY,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
static int ltc294x_i2c_probe(struct i2c_client *client)
{
struct power_supply_config psy_cfg = {};
struct ltc294x_info *info;
struct device_node *np;
int ret;
u32 prescaler_exp;
s32 r_sense;
u8 status;
info = devm_kzalloc(&client->dev, sizeof(*info), GFP_KERNEL);
if (info == NULL)
return -ENOMEM;
i2c_set_clientdata(client, info);
np = of_node_get(client->dev.of_node);
info->id = (enum ltc294x_id) (uintptr_t) of_device_get_match_data(
&client->dev);
info->supply_desc.name = np->name;
/* r_sense can be negative, when sense+ is connected to the battery
* instead of the sense-. This results in reversed measurements. */
ret = of_property_read_u32(np, "lltc,resistor-sense", &r_sense);
if (ret < 0)
return dev_err_probe(&client->dev, ret,
"Could not find lltc,resistor-sense in devicetree\n");
info->r_sense = r_sense;
ret = of_property_read_u32(np, "lltc,prescaler-exponent",
&prescaler_exp);
if (ret < 0) {
dev_warn(&client->dev,
"lltc,prescaler-exponent not in devicetree\n");
prescaler_exp = LTC2941_MAX_PRESCALER_EXP;
}
if (info->id == LTC2943_ID) {
if (prescaler_exp > LTC2943_MAX_PRESCALER_EXP)
prescaler_exp = LTC2943_MAX_PRESCALER_EXP;
info->Qlsb = ((340 * 50000) / r_sense) >>
(12 - 2*prescaler_exp);
} else {
if (prescaler_exp > LTC2941_MAX_PRESCALER_EXP)
prescaler_exp = LTC2941_MAX_PRESCALER_EXP;
info->Qlsb = ((85 * 50000) / r_sense) >>
(7 - prescaler_exp);
}
/* Read status register to check for LTC2942 */
if (info->id == LTC2941_ID || info->id == LTC2942_ID) {
ret = ltc294x_read_regs(client, LTC294X_REG_STATUS, &status, 1);
if (ret < 0)
return dev_err_probe(&client->dev, ret,
"Could not read status register\n");
if (status & LTC2941_REG_STATUS_CHIP_ID)
info->id = LTC2941_ID;
else
info->id = LTC2942_ID;
}
info->client = client;
info->supply_desc.type = POWER_SUPPLY_TYPE_BATTERY;
info->supply_desc.properties = ltc294x_properties;
switch (info->id) {
case LTC2944_ID:
case LTC2943_ID:
info->supply_desc.num_properties =
ARRAY_SIZE(ltc294x_properties);
break;
case LTC2942_ID:
info->supply_desc.num_properties =
ARRAY_SIZE(ltc294x_properties) - 1;
break;
case LTC2941_ID:
default:
info->supply_desc.num_properties =
ARRAY_SIZE(ltc294x_properties) - 3;
break;
}
info->supply_desc.get_property = ltc294x_get_property;
info->supply_desc.set_property = ltc294x_set_property;
info->supply_desc.property_is_writeable = ltc294x_property_is_writeable;
info->supply_desc.external_power_changed = NULL;
psy_cfg.drv_data = info;
ret = devm_delayed_work_autocancel(&client->dev, &info->work,
ltc294x_work);
if (ret)
return ret;
ret = ltc294x_reset(info, prescaler_exp);
if (ret < 0)
return dev_err_probe(&client->dev, ret,
"Communication with chip failed\n");
info->supply = devm_power_supply_register(&client->dev,
&info->supply_desc, &psy_cfg);
if (IS_ERR(info->supply))
return dev_err_probe(&client->dev, PTR_ERR(info->supply),
"failed to register ltc2941\n");
schedule_delayed_work(&info->work, LTC294X_WORK_DELAY * HZ);
return 0;
}
static void ltc294x_i2c_shutdown(struct i2c_client *client)
{
struct ltc294x_info *info = i2c_get_clientdata(client);
int ret;
u8 value;
u8 control;
/* The LTC2941 does not need any special handling */
if (info->id == LTC2941_ID)
return;
/* Read control register */
ret = ltc294x_read_regs(info->client, LTC294X_REG_CONTROL, &value, 1);
if (ret < 0)
return;
/* Disable continuous ADC conversion as this drains the battery */
control = LTC294X_REG_CONTROL_ADC_DISABLE(value);
if (control != value)
ltc294x_write_regs(info->client, LTC294X_REG_CONTROL,
&control, 1);
}
#ifdef CONFIG_PM_SLEEP
static int ltc294x_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ltc294x_info *info = i2c_get_clientdata(client);
cancel_delayed_work(&info->work);
return 0;
}
static int ltc294x_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ltc294x_info *info = i2c_get_clientdata(client);
schedule_delayed_work(&info->work, LTC294X_WORK_DELAY * HZ);
return 0;
}
static SIMPLE_DEV_PM_OPS(ltc294x_pm_ops, ltc294x_suspend, ltc294x_resume);
#define LTC294X_PM_OPS (<c294x_pm_ops)
#else
#define LTC294X_PM_OPS NULL
#endif /* CONFIG_PM_SLEEP */
static const struct i2c_device_id ltc294x_i2c_id[] = {
{ "ltc2941", LTC2941_ID, },
{ "ltc2942", LTC2942_ID, },
{ "ltc2943", LTC2943_ID, },
{ "ltc2944", LTC2944_ID, },
{ },
};
MODULE_DEVICE_TABLE(i2c, ltc294x_i2c_id);
static const struct of_device_id ltc294x_i2c_of_match[] = {
{
.compatible = "lltc,ltc2941",
.data = (void *)LTC2941_ID,
},
{
.compatible = "lltc,ltc2942",
.data = (void *)LTC2942_ID,
},
{
.compatible = "lltc,ltc2943",
.data = (void *)LTC2943_ID,
},
{
.compatible = "lltc,ltc2944",
.data = (void *)LTC2944_ID,
},
{ },
};
MODULE_DEVICE_TABLE(of, ltc294x_i2c_of_match);
static struct i2c_driver ltc294x_driver = {
.driver = {
.name = "LTC2941",
.of_match_table = ltc294x_i2c_of_match,
.pm = LTC294X_PM_OPS,
},
.probe = ltc294x_i2c_probe,
.shutdown = ltc294x_i2c_shutdown,
.id_table = ltc294x_i2c_id,
};
module_i2c_driver(ltc294x_driver);
MODULE_AUTHOR("Auryn Verwegen, Topic Embedded Systems");
MODULE_AUTHOR("Mike Looijmans, Topic Embedded Products");
MODULE_DESCRIPTION("LTC2941/LTC2942/LTC2943/LTC2944 Battery Gas Gauge IC driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/ltc2941-battery-gauge.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* DA9150 Fuel-Gauge Driver
*
* Copyright (c) 2015 Dialog Semiconductor
*
* Author: Adam Thomson <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/power_supply.h>
#include <linux/list.h>
#include <asm/div64.h>
#include <linux/mfd/da9150/core.h>
#include <linux/mfd/da9150/registers.h>
#include <linux/devm-helpers.h>
/* Core2Wire */
#define DA9150_QIF_READ (0x0 << 7)
#define DA9150_QIF_WRITE (0x1 << 7)
#define DA9150_QIF_CODE_MASK 0x7F
#define DA9150_QIF_BYTE_SIZE 8
#define DA9150_QIF_BYTE_MASK 0xFF
#define DA9150_QIF_SHORT_SIZE 2
#define DA9150_QIF_LONG_SIZE 4
/* QIF Codes */
#define DA9150_QIF_UAVG 6
#define DA9150_QIF_UAVG_SIZE DA9150_QIF_LONG_SIZE
#define DA9150_QIF_IAVG 8
#define DA9150_QIF_IAVG_SIZE DA9150_QIF_LONG_SIZE
#define DA9150_QIF_NTCAVG 12
#define DA9150_QIF_NTCAVG_SIZE DA9150_QIF_LONG_SIZE
#define DA9150_QIF_SHUNT_VAL 36
#define DA9150_QIF_SHUNT_VAL_SIZE DA9150_QIF_SHORT_SIZE
#define DA9150_QIF_SD_GAIN 38
#define DA9150_QIF_SD_GAIN_SIZE DA9150_QIF_LONG_SIZE
#define DA9150_QIF_FCC_MAH 40
#define DA9150_QIF_FCC_MAH_SIZE DA9150_QIF_SHORT_SIZE
#define DA9150_QIF_SOC_PCT 43
#define DA9150_QIF_SOC_PCT_SIZE DA9150_QIF_SHORT_SIZE
#define DA9150_QIF_CHARGE_LIMIT 44
#define DA9150_QIF_CHARGE_LIMIT_SIZE DA9150_QIF_SHORT_SIZE
#define DA9150_QIF_DISCHARGE_LIMIT 45
#define DA9150_QIF_DISCHARGE_LIMIT_SIZE DA9150_QIF_SHORT_SIZE
#define DA9150_QIF_FW_MAIN_VER 118
#define DA9150_QIF_FW_MAIN_VER_SIZE DA9150_QIF_SHORT_SIZE
#define DA9150_QIF_E_FG_STATUS 126
#define DA9150_QIF_E_FG_STATUS_SIZE DA9150_QIF_SHORT_SIZE
#define DA9150_QIF_SYNC 127
#define DA9150_QIF_SYNC_SIZE DA9150_QIF_SHORT_SIZE
#define DA9150_QIF_MAX_CODES 128
/* QIF Sync Timeout */
#define DA9150_QIF_SYNC_TIMEOUT 1000
#define DA9150_QIF_SYNC_RETRIES 10
/* QIF E_FG_STATUS */
#define DA9150_FG_IRQ_LOW_SOC_MASK (1 << 0)
#define DA9150_FG_IRQ_HIGH_SOC_MASK (1 << 1)
#define DA9150_FG_IRQ_SOC_MASK \
(DA9150_FG_IRQ_LOW_SOC_MASK | DA9150_FG_IRQ_HIGH_SOC_MASK)
/* Private data */
struct da9150_fg {
struct da9150 *da9150;
struct device *dev;
struct mutex io_lock;
struct power_supply *battery;
struct delayed_work work;
u32 interval;
int warn_soc;
int crit_soc;
int soc;
};
/* Battery Properties */
static u32 da9150_fg_read_attr(struct da9150_fg *fg, u8 code, u8 size)
{
u8 buf[DA9150_QIF_LONG_SIZE];
u8 read_addr;
u32 res = 0;
int i;
/* Set QIF code (READ mode) */
read_addr = (code & DA9150_QIF_CODE_MASK) | DA9150_QIF_READ;
da9150_read_qif(fg->da9150, read_addr, size, buf);
for (i = 0; i < size; ++i)
res |= (buf[i] << (i * DA9150_QIF_BYTE_SIZE));
return res;
}
static void da9150_fg_write_attr(struct da9150_fg *fg, u8 code, u8 size,
u32 val)
{
u8 buf[DA9150_QIF_LONG_SIZE];
u8 write_addr;
int i;
/* Set QIF code (WRITE mode) */
write_addr = (code & DA9150_QIF_CODE_MASK) | DA9150_QIF_WRITE;
for (i = 0; i < size; ++i) {
buf[i] = (val >> (i * DA9150_QIF_BYTE_SIZE)) &
DA9150_QIF_BYTE_MASK;
}
da9150_write_qif(fg->da9150, write_addr, size, buf);
}
/* Trigger QIF Sync to update QIF readable data */
static void da9150_fg_read_sync_start(struct da9150_fg *fg)
{
int i = 0;
u32 res = 0;
mutex_lock(&fg->io_lock);
/* Check if QIF sync already requested, and write to sync if not */
res = da9150_fg_read_attr(fg, DA9150_QIF_SYNC,
DA9150_QIF_SYNC_SIZE);
if (res > 0)
da9150_fg_write_attr(fg, DA9150_QIF_SYNC,
DA9150_QIF_SYNC_SIZE, 0);
/* Wait for sync to complete */
res = 0;
while ((res == 0) && (i++ < DA9150_QIF_SYNC_RETRIES)) {
usleep_range(DA9150_QIF_SYNC_TIMEOUT,
DA9150_QIF_SYNC_TIMEOUT * 2);
res = da9150_fg_read_attr(fg, DA9150_QIF_SYNC,
DA9150_QIF_SYNC_SIZE);
}
/* Check if sync completed */
if (res == 0)
dev_err(fg->dev, "Failed to perform QIF read sync!\n");
}
/*
* Should always be called after QIF sync read has been performed, and all
* attributes required have been accessed.
*/
static inline void da9150_fg_read_sync_end(struct da9150_fg *fg)
{
mutex_unlock(&fg->io_lock);
}
/* Sync read of single QIF attribute */
static u32 da9150_fg_read_attr_sync(struct da9150_fg *fg, u8 code, u8 size)
{
u32 val;
da9150_fg_read_sync_start(fg);
val = da9150_fg_read_attr(fg, code, size);
da9150_fg_read_sync_end(fg);
return val;
}
/* Wait for QIF Sync, write QIF data and wait for ack */
static void da9150_fg_write_attr_sync(struct da9150_fg *fg, u8 code, u8 size,
u32 val)
{
int i = 0;
u32 res = 0, sync_val;
mutex_lock(&fg->io_lock);
/* Check if QIF sync already requested */
res = da9150_fg_read_attr(fg, DA9150_QIF_SYNC,
DA9150_QIF_SYNC_SIZE);
/* Wait for an existing sync to complete */
while ((res == 0) && (i++ < DA9150_QIF_SYNC_RETRIES)) {
usleep_range(DA9150_QIF_SYNC_TIMEOUT,
DA9150_QIF_SYNC_TIMEOUT * 2);
res = da9150_fg_read_attr(fg, DA9150_QIF_SYNC,
DA9150_QIF_SYNC_SIZE);
}
if (res == 0) {
dev_err(fg->dev, "Timeout waiting for existing QIF sync!\n");
mutex_unlock(&fg->io_lock);
return;
}
/* Write value for QIF code */
da9150_fg_write_attr(fg, code, size, val);
/* Wait for write acknowledgment */
i = 0;
sync_val = res;
while ((res == sync_val) && (i++ < DA9150_QIF_SYNC_RETRIES)) {
usleep_range(DA9150_QIF_SYNC_TIMEOUT,
DA9150_QIF_SYNC_TIMEOUT * 2);
res = da9150_fg_read_attr(fg, DA9150_QIF_SYNC,
DA9150_QIF_SYNC_SIZE);
}
mutex_unlock(&fg->io_lock);
/* Check write was actually successful */
if (res != (sync_val + 1))
dev_err(fg->dev, "Error performing QIF sync write for code %d\n",
code);
}
/* Power Supply attributes */
static int da9150_fg_capacity(struct da9150_fg *fg,
union power_supply_propval *val)
{
val->intval = da9150_fg_read_attr_sync(fg, DA9150_QIF_SOC_PCT,
DA9150_QIF_SOC_PCT_SIZE);
if (val->intval > 100)
val->intval = 100;
return 0;
}
static int da9150_fg_current_avg(struct da9150_fg *fg,
union power_supply_propval *val)
{
u32 iavg, sd_gain, shunt_val;
u64 div, res;
da9150_fg_read_sync_start(fg);
iavg = da9150_fg_read_attr(fg, DA9150_QIF_IAVG,
DA9150_QIF_IAVG_SIZE);
shunt_val = da9150_fg_read_attr(fg, DA9150_QIF_SHUNT_VAL,
DA9150_QIF_SHUNT_VAL_SIZE);
sd_gain = da9150_fg_read_attr(fg, DA9150_QIF_SD_GAIN,
DA9150_QIF_SD_GAIN_SIZE);
da9150_fg_read_sync_end(fg);
div = (u64) (sd_gain * shunt_val * 65536ULL);
do_div(div, 1000000);
res = (u64) (iavg * 1000000ULL);
do_div(res, div);
val->intval = (int) res;
return 0;
}
static int da9150_fg_voltage_avg(struct da9150_fg *fg,
union power_supply_propval *val)
{
u64 res;
val->intval = da9150_fg_read_attr_sync(fg, DA9150_QIF_UAVG,
DA9150_QIF_UAVG_SIZE);
res = (u64) (val->intval * 186ULL);
do_div(res, 10000);
val->intval = (int) res;
return 0;
}
static int da9150_fg_charge_full(struct da9150_fg *fg,
union power_supply_propval *val)
{
val->intval = da9150_fg_read_attr_sync(fg, DA9150_QIF_FCC_MAH,
DA9150_QIF_FCC_MAH_SIZE);
val->intval = val->intval * 1000;
return 0;
}
/*
* Temperature reading from device is only valid if battery/system provides
* valid NTC to associated pin of DA9150 chip.
*/
static int da9150_fg_temp(struct da9150_fg *fg,
union power_supply_propval *val)
{
val->intval = da9150_fg_read_attr_sync(fg, DA9150_QIF_NTCAVG,
DA9150_QIF_NTCAVG_SIZE);
val->intval = (val->intval * 10) / 1048576;
return 0;
}
static enum power_supply_property da9150_fg_props[] = {
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_TEMP,
};
static int da9150_fg_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct da9150_fg *fg = dev_get_drvdata(psy->dev.parent);
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_CAPACITY:
ret = da9150_fg_capacity(fg, val);
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
ret = da9150_fg_current_avg(fg, val);
break;
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
ret = da9150_fg_voltage_avg(fg, val);
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
ret = da9150_fg_charge_full(fg, val);
break;
case POWER_SUPPLY_PROP_TEMP:
ret = da9150_fg_temp(fg, val);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
/* Repeated SOC check */
static bool da9150_fg_soc_changed(struct da9150_fg *fg)
{
union power_supply_propval val;
da9150_fg_capacity(fg, &val);
if (val.intval != fg->soc) {
fg->soc = val.intval;
return true;
}
return false;
}
static void da9150_fg_work(struct work_struct *work)
{
struct da9150_fg *fg = container_of(work, struct da9150_fg, work.work);
/* Report if SOC has changed */
if (da9150_fg_soc_changed(fg))
power_supply_changed(fg->battery);
schedule_delayed_work(&fg->work, msecs_to_jiffies(fg->interval));
}
/* SOC level event configuration */
static void da9150_fg_soc_event_config(struct da9150_fg *fg)
{
int soc;
soc = da9150_fg_read_attr_sync(fg, DA9150_QIF_SOC_PCT,
DA9150_QIF_SOC_PCT_SIZE);
if (soc > fg->warn_soc) {
/* If SOC > warn level, set discharge warn level event */
da9150_fg_write_attr_sync(fg, DA9150_QIF_DISCHARGE_LIMIT,
DA9150_QIF_DISCHARGE_LIMIT_SIZE,
fg->warn_soc + 1);
} else if ((soc <= fg->warn_soc) && (soc > fg->crit_soc)) {
/*
* If SOC <= warn level, set discharge crit level event,
* and set charge warn level event.
*/
da9150_fg_write_attr_sync(fg, DA9150_QIF_DISCHARGE_LIMIT,
DA9150_QIF_DISCHARGE_LIMIT_SIZE,
fg->crit_soc + 1);
da9150_fg_write_attr_sync(fg, DA9150_QIF_CHARGE_LIMIT,
DA9150_QIF_CHARGE_LIMIT_SIZE,
fg->warn_soc);
} else if (soc <= fg->crit_soc) {
/* If SOC <= crit level, set charge crit level event */
da9150_fg_write_attr_sync(fg, DA9150_QIF_CHARGE_LIMIT,
DA9150_QIF_CHARGE_LIMIT_SIZE,
fg->crit_soc);
}
}
static irqreturn_t da9150_fg_irq(int irq, void *data)
{
struct da9150_fg *fg = data;
u32 e_fg_status;
/* Read FG IRQ status info */
e_fg_status = da9150_fg_read_attr(fg, DA9150_QIF_E_FG_STATUS,
DA9150_QIF_E_FG_STATUS_SIZE);
/* Handle warning/critical threhold events */
if (e_fg_status & DA9150_FG_IRQ_SOC_MASK)
da9150_fg_soc_event_config(fg);
/* Clear any FG IRQs */
da9150_fg_write_attr(fg, DA9150_QIF_E_FG_STATUS,
DA9150_QIF_E_FG_STATUS_SIZE, e_fg_status);
return IRQ_HANDLED;
}
static struct da9150_fg_pdata *da9150_fg_dt_pdata(struct device *dev)
{
struct device_node *fg_node = dev->of_node;
struct da9150_fg_pdata *pdata;
pdata = devm_kzalloc(dev, sizeof(struct da9150_fg_pdata), GFP_KERNEL);
if (!pdata)
return NULL;
of_property_read_u32(fg_node, "dlg,update-interval",
&pdata->update_interval);
of_property_read_u8(fg_node, "dlg,warn-soc-level",
&pdata->warn_soc_lvl);
of_property_read_u8(fg_node, "dlg,crit-soc-level",
&pdata->crit_soc_lvl);
return pdata;
}
static const struct power_supply_desc fg_desc = {
.name = "da9150-fg",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = da9150_fg_props,
.num_properties = ARRAY_SIZE(da9150_fg_props),
.get_property = da9150_fg_get_prop,
};
static int da9150_fg_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct da9150 *da9150 = dev_get_drvdata(dev->parent);
struct da9150_fg_pdata *fg_pdata = dev_get_platdata(dev);
struct da9150_fg *fg;
int ver, irq, ret = 0;
fg = devm_kzalloc(dev, sizeof(*fg), GFP_KERNEL);
if (fg == NULL)
return -ENOMEM;
platform_set_drvdata(pdev, fg);
fg->da9150 = da9150;
fg->dev = dev;
mutex_init(&fg->io_lock);
/* Enable QIF */
da9150_set_bits(da9150, DA9150_CORE2WIRE_CTRL_A, DA9150_FG_QIF_EN_MASK,
DA9150_FG_QIF_EN_MASK);
fg->battery = devm_power_supply_register(dev, &fg_desc, NULL);
if (IS_ERR(fg->battery)) {
ret = PTR_ERR(fg->battery);
return ret;
}
ver = da9150_fg_read_attr(fg, DA9150_QIF_FW_MAIN_VER,
DA9150_QIF_FW_MAIN_VER_SIZE);
dev_info(dev, "Version: 0x%x\n", ver);
/* Handle DT data if provided */
if (dev->of_node) {
fg_pdata = da9150_fg_dt_pdata(dev);
dev->platform_data = fg_pdata;
}
/* Handle any pdata provided */
if (fg_pdata) {
fg->interval = fg_pdata->update_interval;
if (fg_pdata->warn_soc_lvl > 100)
dev_warn(dev, "Invalid SOC warning level provided, Ignoring");
else
fg->warn_soc = fg_pdata->warn_soc_lvl;
if ((fg_pdata->crit_soc_lvl > 100) ||
(fg_pdata->crit_soc_lvl >= fg_pdata->warn_soc_lvl))
dev_warn(dev, "Invalid SOC critical level provided, Ignoring");
else
fg->crit_soc = fg_pdata->crit_soc_lvl;
}
/* Configure initial SOC level events */
da9150_fg_soc_event_config(fg);
/*
* If an interval period has been provided then setup repeating
* work for reporting data updates.
*/
if (fg->interval) {
ret = devm_delayed_work_autocancel(dev, &fg->work,
da9150_fg_work);
if (ret) {
dev_err(dev, "Failed to init work\n");
return ret;
}
schedule_delayed_work(&fg->work,
msecs_to_jiffies(fg->interval));
}
/* Register IRQ */
irq = platform_get_irq_byname(pdev, "FG");
if (irq < 0)
return irq;
ret = devm_request_threaded_irq(dev, irq, NULL, da9150_fg_irq,
IRQF_ONESHOT, "FG", fg);
if (ret) {
dev_err(dev, "Failed to request IRQ %d: %d\n", irq, ret);
return ret;
}
return 0;
}
static int da9150_fg_resume(struct platform_device *pdev)
{
struct da9150_fg *fg = platform_get_drvdata(pdev);
/*
* Trigger SOC check to happen now so as to indicate any value change
* since last check before suspend.
*/
if (fg->interval)
flush_delayed_work(&fg->work);
return 0;
}
static struct platform_driver da9150_fg_driver = {
.driver = {
.name = "da9150-fuel-gauge",
},
.probe = da9150_fg_probe,
.resume = da9150_fg_resume,
};
module_platform_driver(da9150_fg_driver);
MODULE_DESCRIPTION("Fuel-Gauge Driver for DA9150");
MODULE_AUTHOR("Adam Thomson <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/da9150-fg.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) ST-Ericsson AB 2012
*
* Main and Back-up battery management driver.
*
* Note: Backup battery management is required in case of Li-Ion battery and not
* for capacitive battery. HREF boards have capacitive battery and hence backup
* battery management is not used and the supported code is available in this
* driver.
*
* Author:
* Johan Palsson <[email protected]>
* Karl Komierowski <[email protected]>
* Arun R Murthy <[email protected]>
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/component.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/kobject.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/time.h>
#include <linux/time64.h>
#include <linux/of.h>
#include <linux/completion.h>
#include <linux/mfd/core.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/iio/consumer.h>
#include <linux/kernel.h>
#include <linux/fixp-arith.h>
#include "ab8500-bm.h"
#define FG_LSB_IN_MA 1627
#define QLSB_NANO_AMP_HOURS_X10 1071
#define INS_CURR_TIMEOUT (3 * HZ)
#define SEC_TO_SAMPLE(S) (S * 4)
#define NBR_AVG_SAMPLES 20
#define WAIT_FOR_INST_CURRENT_MAX 70
/* Currents higher than -500mA (dissipating) will make compensation unstable */
#define IGNORE_VBAT_HIGHCUR -500000
#define LOW_BAT_CHECK_INTERVAL (HZ / 16) /* 62.5 ms */
#define VALID_CAPACITY_SEC (45 * 60) /* 45 minutes */
#define BATT_OK_MIN 2360 /* mV */
#define BATT_OK_INCREMENT 50 /* mV */
#define BATT_OK_MAX_NR_INCREMENTS 0xE
/* FG constants */
#define BATT_OVV 0x01
/**
* struct ab8500_fg_interrupts - ab8500 fg interrupts
* @name: name of the interrupt
* @isr function pointer to the isr
*/
struct ab8500_fg_interrupts {
char *name;
irqreturn_t (*isr)(int irq, void *data);
};
enum ab8500_fg_discharge_state {
AB8500_FG_DISCHARGE_INIT,
AB8500_FG_DISCHARGE_INITMEASURING,
AB8500_FG_DISCHARGE_INIT_RECOVERY,
AB8500_FG_DISCHARGE_RECOVERY,
AB8500_FG_DISCHARGE_READOUT_INIT,
AB8500_FG_DISCHARGE_READOUT,
AB8500_FG_DISCHARGE_WAKEUP,
};
static char *discharge_state[] = {
"DISCHARGE_INIT",
"DISCHARGE_INITMEASURING",
"DISCHARGE_INIT_RECOVERY",
"DISCHARGE_RECOVERY",
"DISCHARGE_READOUT_INIT",
"DISCHARGE_READOUT",
"DISCHARGE_WAKEUP",
};
enum ab8500_fg_charge_state {
AB8500_FG_CHARGE_INIT,
AB8500_FG_CHARGE_READOUT,
};
static char *charge_state[] = {
"CHARGE_INIT",
"CHARGE_READOUT",
};
enum ab8500_fg_calibration_state {
AB8500_FG_CALIB_INIT,
AB8500_FG_CALIB_WAIT,
AB8500_FG_CALIB_END,
};
struct ab8500_fg_avg_cap {
int avg;
int samples[NBR_AVG_SAMPLES];
time64_t time_stamps[NBR_AVG_SAMPLES];
int pos;
int nbr_samples;
int sum;
};
struct ab8500_fg_cap_scaling {
bool enable;
int cap_to_scale[2];
int disable_cap_level;
int scaled_cap;
};
struct ab8500_fg_battery_capacity {
int max_mah_design;
int max_mah;
int mah;
int permille;
int level;
int prev_mah;
int prev_percent;
int prev_level;
int user_mah;
struct ab8500_fg_cap_scaling cap_scale;
};
struct ab8500_fg_flags {
bool fg_enabled;
bool conv_done;
bool charging;
bool fully_charged;
bool force_full;
bool low_bat_delay;
bool low_bat;
bool bat_ovv;
bool batt_unknown;
bool calibrate;
bool user_cap;
bool batt_id_received;
};
struct inst_curr_result_list {
struct list_head list;
int *result;
};
/**
* struct ab8500_fg - ab8500 FG device information
* @dev: Pointer to the structure device
* @node: a list of AB8500 FGs, hence prepared for reentrance
* @irq holds the CCEOC interrupt number
* @vbat_uv: Battery voltage in uV
* @vbat_nom_uv: Nominal battery voltage in uV
* @inst_curr_ua: Instantenous battery current in uA
* @avg_curr_ua: Average battery current in uA
* @bat_temp battery temperature
* @fg_samples: Number of samples used in the FG accumulation
* @accu_charge: Accumulated charge from the last conversion
* @recovery_cnt: Counter for recovery mode
* @high_curr_cnt: Counter for high current mode
* @init_cnt: Counter for init mode
* @low_bat_cnt Counter for number of consecutive low battery measures
* @nbr_cceoc_irq_cnt Counter for number of CCEOC irqs received since enabled
* @recovery_needed: Indicate if recovery is needed
* @high_curr_mode: Indicate if we're in high current mode
* @init_capacity: Indicate if initial capacity measuring should be done
* @turn_off_fg: True if fg was off before current measurement
* @calib_state State during offset calibration
* @discharge_state: Current discharge state
* @charge_state: Current charge state
* @ab8500_fg_started Completion struct used for the instant current start
* @ab8500_fg_complete Completion struct used for the instant current reading
* @flags: Structure for information about events triggered
* @bat_cap: Structure for battery capacity specific parameters
* @avg_cap: Average capacity filter
* @parent: Pointer to the struct ab8500
* @main_bat_v: ADC channel for the main battery voltage
* @bm: Platform specific battery management information
* @fg_psy: Structure that holds the FG specific battery properties
* @fg_wq: Work queue for running the FG algorithm
* @fg_periodic_work: Work to run the FG algorithm periodically
* @fg_low_bat_work: Work to check low bat condition
* @fg_reinit_work Work used to reset and reinitialise the FG algorithm
* @fg_work: Work to run the FG algorithm instantly
* @fg_acc_cur_work: Work to read the FG accumulator
* @fg_check_hw_failure_work: Work for checking HW state
* @cc_lock: Mutex for locking the CC
* @fg_kobject: Structure of type kobject
*/
struct ab8500_fg {
struct device *dev;
struct list_head node;
int irq;
int vbat_uv;
int vbat_nom_uv;
int inst_curr_ua;
int avg_curr_ua;
int bat_temp;
int fg_samples;
int accu_charge;
int recovery_cnt;
int high_curr_cnt;
int init_cnt;
int low_bat_cnt;
int nbr_cceoc_irq_cnt;
u32 line_impedance_uohm;
bool recovery_needed;
bool high_curr_mode;
bool init_capacity;
bool turn_off_fg;
enum ab8500_fg_calibration_state calib_state;
enum ab8500_fg_discharge_state discharge_state;
enum ab8500_fg_charge_state charge_state;
struct completion ab8500_fg_started;
struct completion ab8500_fg_complete;
struct ab8500_fg_flags flags;
struct ab8500_fg_battery_capacity bat_cap;
struct ab8500_fg_avg_cap avg_cap;
struct ab8500 *parent;
struct iio_channel *main_bat_v;
struct ab8500_bm_data *bm;
struct power_supply *fg_psy;
struct workqueue_struct *fg_wq;
struct delayed_work fg_periodic_work;
struct delayed_work fg_low_bat_work;
struct delayed_work fg_reinit_work;
struct work_struct fg_work;
struct work_struct fg_acc_cur_work;
struct delayed_work fg_check_hw_failure_work;
struct mutex cc_lock;
struct kobject fg_kobject;
};
static LIST_HEAD(ab8500_fg_list);
/**
* ab8500_fg_get() - returns a reference to the primary AB8500 fuel gauge
* (i.e. the first fuel gauge in the instance list)
*/
struct ab8500_fg *ab8500_fg_get(void)
{
return list_first_entry_or_null(&ab8500_fg_list, struct ab8500_fg,
node);
}
/* Main battery properties */
static enum power_supply_property ab8500_fg_props[] = {
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
POWER_SUPPLY_PROP_ENERGY_FULL,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
};
/*
* This array maps the raw hex value to lowbat voltage used by the AB8500
* Values taken from the UM0836, in microvolts.
*/
static int ab8500_fg_lowbat_voltage_map[] = {
2300000,
2325000,
2350000,
2375000,
2400000,
2425000,
2450000,
2475000,
2500000,
2525000,
2550000,
2575000,
2600000,
2625000,
2650000,
2675000,
2700000,
2725000,
2750000,
2775000,
2800000,
2825000,
2850000,
2875000,
2900000,
2925000,
2950000,
2975000,
3000000,
3025000,
3050000,
3075000,
3100000,
3125000,
3150000,
3175000,
3200000,
3225000,
3250000,
3275000,
3300000,
3325000,
3350000,
3375000,
3400000,
3425000,
3450000,
3475000,
3500000,
3525000,
3550000,
3575000,
3600000,
3625000,
3650000,
3675000,
3700000,
3725000,
3750000,
3775000,
3800000,
3825000,
3850000,
3850000,
};
static u8 ab8500_volt_to_regval(int voltage_uv)
{
int i;
if (voltage_uv < ab8500_fg_lowbat_voltage_map[0])
return 0;
for (i = 0; i < ARRAY_SIZE(ab8500_fg_lowbat_voltage_map); i++) {
if (voltage_uv < ab8500_fg_lowbat_voltage_map[i])
return (u8) i - 1;
}
/* If not captured above, return index of last element */
return (u8) ARRAY_SIZE(ab8500_fg_lowbat_voltage_map) - 1;
}
/**
* ab8500_fg_is_low_curr() - Low or high current mode
* @di: pointer to the ab8500_fg structure
* @curr_ua: the current to base or our decision on in microampere
*
* Low current mode if the current consumption is below a certain threshold
*/
static int ab8500_fg_is_low_curr(struct ab8500_fg *di, int curr_ua)
{
/*
* We want to know if we're in low current mode
*/
if (curr_ua > -di->bm->fg_params->high_curr_threshold_ua)
return true;
else
return false;
}
/**
* ab8500_fg_add_cap_sample() - Add capacity to average filter
* @di: pointer to the ab8500_fg structure
* @sample: the capacity in mAh to add to the filter
*
* A capacity is added to the filter and a new mean capacity is calculated and
* returned
*/
static int ab8500_fg_add_cap_sample(struct ab8500_fg *di, int sample)
{
time64_t now = ktime_get_boottime_seconds();
struct ab8500_fg_avg_cap *avg = &di->avg_cap;
do {
avg->sum += sample - avg->samples[avg->pos];
avg->samples[avg->pos] = sample;
avg->time_stamps[avg->pos] = now;
avg->pos++;
if (avg->pos == NBR_AVG_SAMPLES)
avg->pos = 0;
if (avg->nbr_samples < NBR_AVG_SAMPLES)
avg->nbr_samples++;
/*
* Check the time stamp for each sample. If too old,
* replace with latest sample
*/
} while (now - VALID_CAPACITY_SEC > avg->time_stamps[avg->pos]);
avg->avg = avg->sum / avg->nbr_samples;
return avg->avg;
}
/**
* ab8500_fg_clear_cap_samples() - Clear average filter
* @di: pointer to the ab8500_fg structure
*
* The capacity filter is reset to zero.
*/
static void ab8500_fg_clear_cap_samples(struct ab8500_fg *di)
{
int i;
struct ab8500_fg_avg_cap *avg = &di->avg_cap;
avg->pos = 0;
avg->nbr_samples = 0;
avg->sum = 0;
avg->avg = 0;
for (i = 0; i < NBR_AVG_SAMPLES; i++) {
avg->samples[i] = 0;
avg->time_stamps[i] = 0;
}
}
/**
* ab8500_fg_fill_cap_sample() - Fill average filter
* @di: pointer to the ab8500_fg structure
* @sample: the capacity in mAh to fill the filter with
*
* The capacity filter is filled with a capacity in mAh
*/
static void ab8500_fg_fill_cap_sample(struct ab8500_fg *di, int sample)
{
int i;
time64_t now;
struct ab8500_fg_avg_cap *avg = &di->avg_cap;
now = ktime_get_boottime_seconds();
for (i = 0; i < NBR_AVG_SAMPLES; i++) {
avg->samples[i] = sample;
avg->time_stamps[i] = now;
}
avg->pos = 0;
avg->nbr_samples = NBR_AVG_SAMPLES;
avg->sum = sample * NBR_AVG_SAMPLES;
avg->avg = sample;
}
/**
* ab8500_fg_coulomb_counter() - enable coulomb counter
* @di: pointer to the ab8500_fg structure
* @enable: enable/disable
*
* Enable/Disable coulomb counter.
* On failure returns negative value.
*/
static int ab8500_fg_coulomb_counter(struct ab8500_fg *di, bool enable)
{
int ret = 0;
mutex_lock(&di->cc_lock);
if (enable) {
/* To be able to reprogram the number of samples, we have to
* first stop the CC and then enable it again */
ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
AB8500_RTC_CC_CONF_REG, 0x00);
if (ret)
goto cc_err;
/* Program the samples */
ret = abx500_set_register_interruptible(di->dev,
AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU,
di->fg_samples);
if (ret)
goto cc_err;
/* Start the CC */
ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
AB8500_RTC_CC_CONF_REG,
(CC_DEEP_SLEEP_ENA | CC_PWR_UP_ENA));
if (ret)
goto cc_err;
di->flags.fg_enabled = true;
} else {
/* Clear any pending read requests */
ret = abx500_mask_and_set_register_interruptible(di->dev,
AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG,
(RESET_ACCU | READ_REQ), 0);
if (ret)
goto cc_err;
ret = abx500_set_register_interruptible(di->dev,
AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU_CTRL, 0);
if (ret)
goto cc_err;
/* Stop the CC */
ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
AB8500_RTC_CC_CONF_REG, 0);
if (ret)
goto cc_err;
di->flags.fg_enabled = false;
}
dev_dbg(di->dev, " CC enabled: %d Samples: %d\n",
enable, di->fg_samples);
mutex_unlock(&di->cc_lock);
return ret;
cc_err:
dev_err(di->dev, "%s Enabling coulomb counter failed\n", __func__);
mutex_unlock(&di->cc_lock);
return ret;
}
/**
* ab8500_fg_inst_curr_start() - start battery instantaneous current
* @di: pointer to the ab8500_fg structure
*
* Returns 0 or error code
* Note: This is part "one" and has to be called before
* ab8500_fg_inst_curr_finalize()
*/
int ab8500_fg_inst_curr_start(struct ab8500_fg *di)
{
u8 reg_val;
int ret;
mutex_lock(&di->cc_lock);
di->nbr_cceoc_irq_cnt = 0;
ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
AB8500_RTC_CC_CONF_REG, ®_val);
if (ret < 0)
goto fail;
if (!(reg_val & CC_PWR_UP_ENA)) {
dev_dbg(di->dev, "%s Enable FG\n", __func__);
di->turn_off_fg = true;
/* Program the samples */
ret = abx500_set_register_interruptible(di->dev,
AB8500_GAS_GAUGE, AB8500_GASG_CC_NCOV_ACCU,
SEC_TO_SAMPLE(10));
if (ret)
goto fail;
/* Start the CC */
ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
AB8500_RTC_CC_CONF_REG,
(CC_DEEP_SLEEP_ENA | CC_PWR_UP_ENA));
if (ret)
goto fail;
} else {
di->turn_off_fg = false;
}
/* Return and WFI */
reinit_completion(&di->ab8500_fg_started);
reinit_completion(&di->ab8500_fg_complete);
enable_irq(di->irq);
/* Note: cc_lock is still locked */
return 0;
fail:
mutex_unlock(&di->cc_lock);
return ret;
}
/**
* ab8500_fg_inst_curr_started() - check if fg conversion has started
* @di: pointer to the ab8500_fg structure
*
* Returns 1 if conversion started, 0 if still waiting
*/
int ab8500_fg_inst_curr_started(struct ab8500_fg *di)
{
return completion_done(&di->ab8500_fg_started);
}
/**
* ab8500_fg_inst_curr_done() - check if fg conversion is done
* @di: pointer to the ab8500_fg structure
*
* Returns 1 if conversion done, 0 if still waiting
*/
int ab8500_fg_inst_curr_done(struct ab8500_fg *di)
{
return completion_done(&di->ab8500_fg_complete);
}
/**
* ab8500_fg_inst_curr_finalize() - battery instantaneous current
* @di: pointer to the ab8500_fg structure
* @curr_ua: battery instantenous current in microampere (on success)
*
* Returns 0 or an error code
* Note: This is part "two" and has to be called at earliest 250 ms
* after ab8500_fg_inst_curr_start()
*/
int ab8500_fg_inst_curr_finalize(struct ab8500_fg *di, int *curr_ua)
{
u8 low, high;
int val;
int ret;
unsigned long timeout;
if (!completion_done(&di->ab8500_fg_complete)) {
timeout = wait_for_completion_timeout(
&di->ab8500_fg_complete,
INS_CURR_TIMEOUT);
dev_dbg(di->dev, "Finalize time: %d ms\n",
jiffies_to_msecs(INS_CURR_TIMEOUT - timeout));
if (!timeout) {
ret = -ETIME;
disable_irq(di->irq);
di->nbr_cceoc_irq_cnt = 0;
dev_err(di->dev, "completion timed out [%d]\n",
__LINE__);
goto fail;
}
}
disable_irq(di->irq);
di->nbr_cceoc_irq_cnt = 0;
ret = abx500_mask_and_set_register_interruptible(di->dev,
AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG,
READ_REQ, READ_REQ);
/* 100uS between read request and read is needed */
usleep_range(100, 100);
/* Read CC Sample conversion value Low and high */
ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE,
AB8500_GASG_CC_SMPL_CNVL_REG, &low);
if (ret < 0)
goto fail;
ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE,
AB8500_GASG_CC_SMPL_CNVH_REG, &high);
if (ret < 0)
goto fail;
/*
* negative value for Discharging
* convert 2's complement into decimal
*/
if (high & 0x10)
val = (low | (high << 8) | 0xFFFFE000);
else
val = (low | (high << 8));
/*
* Convert to unit value in mA
* Full scale input voltage is
* 63.160mV => LSB = 63.160mV/(4096*res) = 1.542.000 uA
* Given a 250ms conversion cycle time the LSB corresponds
* to 107.1 nAh. Convert to current by dividing by the conversion
* time in hours (250ms = 1 / (3600 * 4)h)
* 107.1nAh assumes 10mOhm, but fg_res is in 0.1mOhm
*/
val = (val * QLSB_NANO_AMP_HOURS_X10 * 36 * 4) / di->bm->fg_res;
if (di->turn_off_fg) {
dev_dbg(di->dev, "%s Disable FG\n", __func__);
/* Clear any pending read requests */
ret = abx500_set_register_interruptible(di->dev,
AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG, 0);
if (ret)
goto fail;
/* Stop the CC */
ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
AB8500_RTC_CC_CONF_REG, 0);
if (ret)
goto fail;
}
mutex_unlock(&di->cc_lock);
*curr_ua = val;
return 0;
fail:
mutex_unlock(&di->cc_lock);
return ret;
}
/**
* ab8500_fg_inst_curr_blocking() - battery instantaneous current
* @di: pointer to the ab8500_fg structure
*
* Returns battery instantenous current in microampere (on success)
* else error code
*/
int ab8500_fg_inst_curr_blocking(struct ab8500_fg *di)
{
int ret;
unsigned long timeout;
int curr_ua = 0;
ret = ab8500_fg_inst_curr_start(di);
if (ret) {
dev_err(di->dev, "Failed to initialize fg_inst\n");
return 0;
}
/* Wait for CC to actually start */
if (!completion_done(&di->ab8500_fg_started)) {
timeout = wait_for_completion_timeout(
&di->ab8500_fg_started,
INS_CURR_TIMEOUT);
dev_dbg(di->dev, "Start time: %d ms\n",
jiffies_to_msecs(INS_CURR_TIMEOUT - timeout));
if (!timeout) {
ret = -ETIME;
dev_err(di->dev, "completion timed out [%d]\n",
__LINE__);
goto fail;
}
}
ret = ab8500_fg_inst_curr_finalize(di, &curr_ua);
if (ret) {
dev_err(di->dev, "Failed to finalize fg_inst\n");
return 0;
}
dev_dbg(di->dev, "%s instant current: %d uA", __func__, curr_ua);
return curr_ua;
fail:
disable_irq(di->irq);
mutex_unlock(&di->cc_lock);
return ret;
}
/**
* ab8500_fg_acc_cur_work() - average battery current
* @work: pointer to the work_struct structure
*
* Updated the average battery current obtained from the
* coulomb counter.
*/
static void ab8500_fg_acc_cur_work(struct work_struct *work)
{
int val;
int ret;
u8 low, med, high;
struct ab8500_fg *di = container_of(work,
struct ab8500_fg, fg_acc_cur_work);
mutex_lock(&di->cc_lock);
ret = abx500_set_register_interruptible(di->dev, AB8500_GAS_GAUGE,
AB8500_GASG_CC_NCOV_ACCU_CTRL, RD_NCONV_ACCU_REQ);
if (ret)
goto exit;
ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE,
AB8500_GASG_CC_NCOV_ACCU_LOW, &low);
if (ret < 0)
goto exit;
ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE,
AB8500_GASG_CC_NCOV_ACCU_MED, &med);
if (ret < 0)
goto exit;
ret = abx500_get_register_interruptible(di->dev, AB8500_GAS_GAUGE,
AB8500_GASG_CC_NCOV_ACCU_HIGH, &high);
if (ret < 0)
goto exit;
/* Check for sign bit in case of negative value, 2's complement */
if (high & 0x10)
val = (low | (med << 8) | (high << 16) | 0xFFE00000);
else
val = (low | (med << 8) | (high << 16));
/*
* Convert to uAh
* Given a 250ms conversion cycle time the LSB corresponds
* to 112.9 nAh.
* 112.9nAh assumes 10mOhm, but fg_res is in 0.1mOhm
*/
di->accu_charge = (val * QLSB_NANO_AMP_HOURS_X10) /
(100 * di->bm->fg_res);
/*
* Convert to unit value in uA
* by dividing by the conversion
* time in hours (= samples / (3600 * 4)h)
*/
di->avg_curr_ua = (val * QLSB_NANO_AMP_HOURS_X10 * 36) /
(di->bm->fg_res * (di->fg_samples / 4));
di->flags.conv_done = true;
mutex_unlock(&di->cc_lock);
queue_work(di->fg_wq, &di->fg_work);
dev_dbg(di->dev, "fg_res: %d, fg_samples: %d, gasg: %d, accu_charge: %d \n",
di->bm->fg_res, di->fg_samples, val, di->accu_charge);
return;
exit:
dev_err(di->dev,
"Failed to read or write gas gauge registers\n");
mutex_unlock(&di->cc_lock);
queue_work(di->fg_wq, &di->fg_work);
}
/**
* ab8500_fg_bat_voltage() - get battery voltage
* @di: pointer to the ab8500_fg structure
*
* Returns battery voltage in microvolts (on success) else error code
*/
static int ab8500_fg_bat_voltage(struct ab8500_fg *di)
{
int vbat, ret;
static int prev;
ret = iio_read_channel_processed(di->main_bat_v, &vbat);
if (ret < 0) {
dev_err(di->dev,
"%s ADC conversion failed, using previous value\n",
__func__);
return prev;
}
/* IIO returns millivolts but we want microvolts */
vbat *= 1000;
prev = vbat;
return vbat;
}
/**
* ab8500_fg_volt_to_capacity() - Voltage based capacity
* @di: pointer to the ab8500_fg structure
* @voltage_uv: The voltage to convert to a capacity in microvolt
*
* Returns battery capacity in per mille based on voltage
*/
static int ab8500_fg_volt_to_capacity(struct ab8500_fg *di, int voltage_uv)
{
struct power_supply_battery_info *bi = di->bm->bi;
/* Multiply by 10 because the capacity is tracked in per mille */
return power_supply_batinfo_ocv2cap(bi, voltage_uv, di->bat_temp) * 10;
}
/**
* ab8500_fg_uncomp_volt_to_capacity() - Uncompensated voltage based capacity
* @di: pointer to the ab8500_fg structure
*
* Returns battery capacity based on battery voltage that is not compensated
* for the voltage drop due to the load
*/
static int ab8500_fg_uncomp_volt_to_capacity(struct ab8500_fg *di)
{
di->vbat_uv = ab8500_fg_bat_voltage(di);
return ab8500_fg_volt_to_capacity(di, di->vbat_uv);
}
/**
* ab8500_fg_battery_resistance() - Returns the battery inner resistance
* @di: pointer to the ab8500_fg structure
* @vbat_uncomp_uv: Uncompensated VBAT voltage
*
* Returns battery inner resistance added with the fuel gauge resistor value
* to get the total resistance in the whole link from gnd to bat+ node
* in milliohm.
*/
static int ab8500_fg_battery_resistance(struct ab8500_fg *di, int vbat_uncomp_uv)
{
struct power_supply_battery_info *bi = di->bm->bi;
int resistance_percent = 0;
int resistance;
/*
* Determine the resistance at this voltage. First try VBAT-to-Ri else
* just infer it from the surrounding temperature, if nothing works just
* use the internal resistance.
*/
if (power_supply_supports_vbat2ri(bi)) {
resistance = power_supply_vbat2ri(bi, vbat_uncomp_uv, di->flags.charging);
/* Convert to milliohm */
resistance = resistance / 1000;
} else if (power_supply_supports_temp2ri(bi)) {
resistance_percent = power_supply_temp2resist_simple(bi->resist_table,
bi->resist_table_size,
di->bat_temp / 10);
/* Convert to milliohm */
resistance = bi->factory_internal_resistance_uohm / 1000;
resistance = resistance * resistance_percent / 100;
} else {
/* Last fallback */
resistance = bi->factory_internal_resistance_uohm / 1000;
}
/* Compensate for line impedance */
resistance += (di->line_impedance_uohm / 1000);
dev_dbg(di->dev, "%s Temp: %d battery internal resistance: %d"
" fg resistance %d, total: %d (mOhm)\n",
__func__, di->bat_temp, resistance, di->bm->fg_res / 10,
(di->bm->fg_res / 10) + resistance);
/* fg_res variable is in 0.1mOhm */
resistance += di->bm->fg_res / 10;
return resistance;
}
/**
* ab8500_load_comp_fg_bat_voltage() - get load compensated battery voltage
* @di: pointer to the ab8500_fg structure
* @always: always return a voltage, also uncompensated
*
* Returns compensated battery voltage (on success) else error code.
* If always is specified, we always return a voltage but it may be
* uncompensated.
*/
static int ab8500_load_comp_fg_bat_voltage(struct ab8500_fg *di, bool always)
{
int i = 0;
int vbat_uv = 0;
int rcomp;
/* Average the instant current to get a stable current measurement */
ab8500_fg_inst_curr_start(di);
do {
vbat_uv += ab8500_fg_bat_voltage(di);
i++;
usleep_range(5000, 6000);
} while (!ab8500_fg_inst_curr_done(di) &&
i <= WAIT_FOR_INST_CURRENT_MAX);
if (i > WAIT_FOR_INST_CURRENT_MAX) {
dev_err(di->dev,
"TIMEOUT: return uncompensated measurement of VBAT\n");
di->vbat_uv = vbat_uv / i;
return di->vbat_uv;
}
ab8500_fg_inst_curr_finalize(di, &di->inst_curr_ua);
/*
* If there is too high current dissipation, the compensation cannot be
* trusted so return an error unless we must return something here, as
* enforced by the "always" parameter.
*/
if (!always && di->inst_curr_ua < IGNORE_VBAT_HIGHCUR)
return -EINVAL;
vbat_uv = vbat_uv / i;
/* Next we apply voltage compensation from internal resistance */
rcomp = ab8500_fg_battery_resistance(di, vbat_uv);
vbat_uv = vbat_uv - (di->inst_curr_ua * rcomp) / 1000;
/* Always keep this state at latest measurement */
di->vbat_uv = vbat_uv;
return vbat_uv;
}
/**
* ab8500_fg_load_comp_volt_to_capacity() - Load compensated voltage based capacity
* @di: pointer to the ab8500_fg structure
*
* Returns battery capacity based on battery voltage that is load compensated
* for the voltage drop
*/
static int ab8500_fg_load_comp_volt_to_capacity(struct ab8500_fg *di)
{
int vbat_comp_uv;
vbat_comp_uv = ab8500_load_comp_fg_bat_voltage(di, true);
return ab8500_fg_volt_to_capacity(di, vbat_comp_uv);
}
/**
* ab8500_fg_convert_mah_to_permille() - Capacity in mAh to permille
* @di: pointer to the ab8500_fg structure
* @cap_mah: capacity in mAh
*
* Converts capacity in mAh to capacity in permille
*/
static int ab8500_fg_convert_mah_to_permille(struct ab8500_fg *di, int cap_mah)
{
return (cap_mah * 1000) / di->bat_cap.max_mah_design;
}
/**
* ab8500_fg_convert_permille_to_mah() - Capacity in permille to mAh
* @di: pointer to the ab8500_fg structure
* @cap_pm: capacity in permille
*
* Converts capacity in permille to capacity in mAh
*/
static int ab8500_fg_convert_permille_to_mah(struct ab8500_fg *di, int cap_pm)
{
return cap_pm * di->bat_cap.max_mah_design / 1000;
}
/**
* ab8500_fg_convert_mah_to_uwh() - Capacity in mAh to uWh
* @di: pointer to the ab8500_fg structure
* @cap_mah: capacity in mAh
*
* Converts capacity in mAh to capacity in uWh
*/
static int ab8500_fg_convert_mah_to_uwh(struct ab8500_fg *di, int cap_mah)
{
u64 div_res;
u32 div_rem;
/*
* Capacity is in milli ampere hours (10^-3)Ah
* Nominal voltage is in microvolts (10^-6)V
* divide by 1000000 after multiplication to get to mWh
*/
div_res = ((u64) cap_mah) * ((u64) di->vbat_nom_uv);
div_rem = do_div(div_res, 1000000);
/* Make sure to round upwards if necessary */
if (div_rem >= 1000000 / 2)
div_res++;
return (int) div_res;
}
/**
* ab8500_fg_calc_cap_charging() - Calculate remaining capacity while charging
* @di: pointer to the ab8500_fg structure
*
* Return the capacity in mAh based on previous calculated capcity and the FG
* accumulator register value. The filter is filled with this capacity
*/
static int ab8500_fg_calc_cap_charging(struct ab8500_fg *di)
{
dev_dbg(di->dev, "%s cap_mah %d accu_charge %d\n",
__func__,
di->bat_cap.mah,
di->accu_charge);
/* Capacity should not be less than 0 */
if (di->bat_cap.mah + di->accu_charge > 0)
di->bat_cap.mah += di->accu_charge;
else
di->bat_cap.mah = 0;
/*
* We force capacity to 100% once when the algorithm
* reports that it's full.
*/
if (di->bat_cap.mah >= di->bat_cap.max_mah_design ||
di->flags.force_full) {
di->bat_cap.mah = di->bat_cap.max_mah_design;
}
ab8500_fg_fill_cap_sample(di, di->bat_cap.mah);
di->bat_cap.permille =
ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah);
/* We need to update battery voltage and inst current when charging */
di->vbat_uv = ab8500_fg_bat_voltage(di);
di->inst_curr_ua = ab8500_fg_inst_curr_blocking(di);
return di->bat_cap.mah;
}
/**
* ab8500_fg_calc_cap_discharge_voltage() - Capacity in discharge with voltage
* @di: pointer to the ab8500_fg structure
*
* Return the capacity in mAh based on the load compensated battery voltage.
* This value is added to the filter and a new mean value is calculated and
* returned.
*/
static int ab8500_fg_calc_cap_discharge_voltage(struct ab8500_fg *di)
{
int permille, mah;
permille = ab8500_fg_load_comp_volt_to_capacity(di);
mah = ab8500_fg_convert_permille_to_mah(di, permille);
di->bat_cap.mah = ab8500_fg_add_cap_sample(di, mah);
di->bat_cap.permille =
ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah);
return di->bat_cap.mah;
}
/**
* ab8500_fg_calc_cap_discharge_fg() - Capacity in discharge with FG
* @di: pointer to the ab8500_fg structure
*
* Return the capacity in mAh based on previous calculated capcity and the FG
* accumulator register value. This value is added to the filter and a
* new mean value is calculated and returned.
*/
static int ab8500_fg_calc_cap_discharge_fg(struct ab8500_fg *di)
{
int permille_volt, permille;
dev_dbg(di->dev, "%s cap_mah %d accu_charge %d\n",
__func__,
di->bat_cap.mah,
di->accu_charge);
/* Capacity should not be less than 0 */
if (di->bat_cap.mah + di->accu_charge > 0)
di->bat_cap.mah += di->accu_charge;
else
di->bat_cap.mah = 0;
if (di->bat_cap.mah >= di->bat_cap.max_mah_design)
di->bat_cap.mah = di->bat_cap.max_mah_design;
/*
* Check against voltage based capacity. It can not be lower
* than what the uncompensated voltage says
*/
permille = ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah);
permille_volt = ab8500_fg_uncomp_volt_to_capacity(di);
if (permille < permille_volt) {
di->bat_cap.permille = permille_volt;
di->bat_cap.mah = ab8500_fg_convert_permille_to_mah(di,
di->bat_cap.permille);
dev_dbg(di->dev, "%s voltage based: perm %d perm_volt %d\n",
__func__,
permille,
permille_volt);
ab8500_fg_fill_cap_sample(di, di->bat_cap.mah);
} else {
ab8500_fg_fill_cap_sample(di, di->bat_cap.mah);
di->bat_cap.permille =
ab8500_fg_convert_mah_to_permille(di, di->bat_cap.mah);
}
return di->bat_cap.mah;
}
/**
* ab8500_fg_capacity_level() - Get the battery capacity level
* @di: pointer to the ab8500_fg structure
*
* Get the battery capacity level based on the capacity in percent
*/
static int ab8500_fg_capacity_level(struct ab8500_fg *di)
{
int ret, percent;
percent = DIV_ROUND_CLOSEST(di->bat_cap.permille, 10);
if (percent <= di->bm->cap_levels->critical ||
di->flags.low_bat)
ret = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
else if (percent <= di->bm->cap_levels->low)
ret = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
else if (percent <= di->bm->cap_levels->normal)
ret = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
else if (percent <= di->bm->cap_levels->high)
ret = POWER_SUPPLY_CAPACITY_LEVEL_HIGH;
else
ret = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
return ret;
}
/**
* ab8500_fg_calculate_scaled_capacity() - Capacity scaling
* @di: pointer to the ab8500_fg structure
*
* Calculates the capacity to be shown to upper layers. Scales the capacity
* to have 100% as a reference from the actual capacity upon removal of charger
* when charging is in maintenance mode.
*/
static int ab8500_fg_calculate_scaled_capacity(struct ab8500_fg *di)
{
struct ab8500_fg_cap_scaling *cs = &di->bat_cap.cap_scale;
int capacity = di->bat_cap.prev_percent;
if (!cs->enable)
return capacity;
/*
* As long as we are in fully charge mode scale the capacity
* to show 100%.
*/
if (di->flags.fully_charged) {
cs->cap_to_scale[0] = 100;
cs->cap_to_scale[1] =
max(capacity, di->bm->fg_params->maint_thres);
dev_dbg(di->dev, "Scale cap with %d/%d\n",
cs->cap_to_scale[0], cs->cap_to_scale[1]);
}
/* Calculates the scaled capacity. */
if ((cs->cap_to_scale[0] != cs->cap_to_scale[1])
&& (cs->cap_to_scale[1] > 0))
capacity = min(100,
DIV_ROUND_CLOSEST(di->bat_cap.prev_percent *
cs->cap_to_scale[0],
cs->cap_to_scale[1]));
if (di->flags.charging) {
if (capacity < cs->disable_cap_level) {
cs->disable_cap_level = capacity;
dev_dbg(di->dev, "Cap to stop scale lowered %d%%\n",
cs->disable_cap_level);
} else if (!di->flags.fully_charged) {
if (di->bat_cap.prev_percent >=
cs->disable_cap_level) {
dev_dbg(di->dev, "Disabling scaled capacity\n");
cs->enable = false;
capacity = di->bat_cap.prev_percent;
} else {
dev_dbg(di->dev,
"Waiting in cap to level %d%%\n",
cs->disable_cap_level);
capacity = cs->disable_cap_level;
}
}
}
return capacity;
}
/**
* ab8500_fg_update_cap_scalers() - Capacity scaling
* @di: pointer to the ab8500_fg structure
*
* To be called when state change from charge<->discharge to update
* the capacity scalers.
*/
static void ab8500_fg_update_cap_scalers(struct ab8500_fg *di)
{
struct ab8500_fg_cap_scaling *cs = &di->bat_cap.cap_scale;
if (!cs->enable)
return;
if (di->flags.charging) {
di->bat_cap.cap_scale.disable_cap_level =
di->bat_cap.cap_scale.scaled_cap;
dev_dbg(di->dev, "Cap to stop scale at charge %d%%\n",
di->bat_cap.cap_scale.disable_cap_level);
} else {
if (cs->scaled_cap != 100) {
cs->cap_to_scale[0] = cs->scaled_cap;
cs->cap_to_scale[1] = di->bat_cap.prev_percent;
} else {
cs->cap_to_scale[0] = 100;
cs->cap_to_scale[1] =
max(di->bat_cap.prev_percent,
di->bm->fg_params->maint_thres);
}
dev_dbg(di->dev, "Cap to scale at discharge %d/%d\n",
cs->cap_to_scale[0], cs->cap_to_scale[1]);
}
}
/**
* ab8500_fg_check_capacity_limits() - Check if capacity has changed
* @di: pointer to the ab8500_fg structure
* @init: capacity is allowed to go up in init mode
*
* Check if capacity or capacity limit has changed and notify the system
* about it using the power_supply framework
*/
static void ab8500_fg_check_capacity_limits(struct ab8500_fg *di, bool init)
{
bool changed = false;
int percent = DIV_ROUND_CLOSEST(di->bat_cap.permille, 10);
di->bat_cap.level = ab8500_fg_capacity_level(di);
if (di->bat_cap.level != di->bat_cap.prev_level) {
/*
* We do not allow reported capacity level to go up
* unless we're charging or if we're in init
*/
if (!(!di->flags.charging && di->bat_cap.level >
di->bat_cap.prev_level) || init) {
dev_dbg(di->dev, "level changed from %d to %d\n",
di->bat_cap.prev_level,
di->bat_cap.level);
di->bat_cap.prev_level = di->bat_cap.level;
changed = true;
} else {
dev_dbg(di->dev, "level not allowed to go up "
"since no charger is connected: %d to %d\n",
di->bat_cap.prev_level,
di->bat_cap.level);
}
}
/*
* If we have received the LOW_BAT IRQ, set capacity to 0 to initiate
* shutdown
*/
if (di->flags.low_bat) {
dev_dbg(di->dev, "Battery low, set capacity to 0\n");
di->bat_cap.prev_percent = 0;
di->bat_cap.permille = 0;
percent = 0;
di->bat_cap.prev_mah = 0;
di->bat_cap.mah = 0;
changed = true;
} else if (di->flags.fully_charged) {
/*
* We report 100% if algorithm reported fully charged
* and show 100% during maintenance charging (scaling).
*/
if (di->flags.force_full) {
di->bat_cap.prev_percent = percent;
di->bat_cap.prev_mah = di->bat_cap.mah;
changed = true;
if (!di->bat_cap.cap_scale.enable &&
di->bm->capacity_scaling) {
di->bat_cap.cap_scale.enable = true;
di->bat_cap.cap_scale.cap_to_scale[0] = 100;
di->bat_cap.cap_scale.cap_to_scale[1] =
di->bat_cap.prev_percent;
di->bat_cap.cap_scale.disable_cap_level = 100;
}
} else if (di->bat_cap.prev_percent != percent) {
dev_dbg(di->dev,
"battery reported full "
"but capacity dropping: %d\n",
percent);
di->bat_cap.prev_percent = percent;
di->bat_cap.prev_mah = di->bat_cap.mah;
changed = true;
}
} else if (di->bat_cap.prev_percent != percent) {
if (percent == 0) {
/*
* We will not report 0% unless we've got
* the LOW_BAT IRQ, no matter what the FG
* algorithm says.
*/
di->bat_cap.prev_percent = 1;
percent = 1;
changed = true;
} else if (!(!di->flags.charging &&
percent > di->bat_cap.prev_percent) || init) {
/*
* We do not allow reported capacity to go up
* unless we're charging or if we're in init
*/
dev_dbg(di->dev,
"capacity changed from %d to %d (%d)\n",
di->bat_cap.prev_percent,
percent,
di->bat_cap.permille);
di->bat_cap.prev_percent = percent;
di->bat_cap.prev_mah = di->bat_cap.mah;
changed = true;
} else {
dev_dbg(di->dev, "capacity not allowed to go up since "
"no charger is connected: %d to %d (%d)\n",
di->bat_cap.prev_percent,
percent,
di->bat_cap.permille);
}
}
if (changed) {
if (di->bm->capacity_scaling) {
di->bat_cap.cap_scale.scaled_cap =
ab8500_fg_calculate_scaled_capacity(di);
dev_info(di->dev, "capacity=%d (%d)\n",
di->bat_cap.prev_percent,
di->bat_cap.cap_scale.scaled_cap);
}
power_supply_changed(di->fg_psy);
if (di->flags.fully_charged && di->flags.force_full) {
dev_dbg(di->dev, "Battery full, notifying.\n");
di->flags.force_full = false;
sysfs_notify(&di->fg_kobject, NULL, "charge_full");
}
sysfs_notify(&di->fg_kobject, NULL, "charge_now");
}
}
static void ab8500_fg_charge_state_to(struct ab8500_fg *di,
enum ab8500_fg_charge_state new_state)
{
dev_dbg(di->dev, "Charge state from %d [%s] to %d [%s]\n",
di->charge_state,
charge_state[di->charge_state],
new_state,
charge_state[new_state]);
di->charge_state = new_state;
}
static void ab8500_fg_discharge_state_to(struct ab8500_fg *di,
enum ab8500_fg_discharge_state new_state)
{
dev_dbg(di->dev, "Discharge state from %d [%s] to %d [%s]\n",
di->discharge_state,
discharge_state[di->discharge_state],
new_state,
discharge_state[new_state]);
di->discharge_state = new_state;
}
/**
* ab8500_fg_algorithm_charging() - FG algorithm for when charging
* @di: pointer to the ab8500_fg structure
*
* Battery capacity calculation state machine for when we're charging
*/
static void ab8500_fg_algorithm_charging(struct ab8500_fg *di)
{
/*
* If we change to discharge mode
* we should start with recovery
*/
if (di->discharge_state != AB8500_FG_DISCHARGE_INIT_RECOVERY)
ab8500_fg_discharge_state_to(di,
AB8500_FG_DISCHARGE_INIT_RECOVERY);
switch (di->charge_state) {
case AB8500_FG_CHARGE_INIT:
di->fg_samples = SEC_TO_SAMPLE(
di->bm->fg_params->accu_charging);
ab8500_fg_coulomb_counter(di, true);
ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_READOUT);
break;
case AB8500_FG_CHARGE_READOUT:
/*
* Read the FG and calculate the new capacity
*/
mutex_lock(&di->cc_lock);
if (!di->flags.conv_done && !di->flags.force_full) {
/* Wasn't the CC IRQ that got us here */
mutex_unlock(&di->cc_lock);
dev_dbg(di->dev, "%s CC conv not done\n",
__func__);
break;
}
di->flags.conv_done = false;
mutex_unlock(&di->cc_lock);
ab8500_fg_calc_cap_charging(di);
break;
default:
break;
}
/* Check capacity limits */
ab8500_fg_check_capacity_limits(di, false);
}
static void force_capacity(struct ab8500_fg *di)
{
int cap;
ab8500_fg_clear_cap_samples(di);
cap = di->bat_cap.user_mah;
if (cap > di->bat_cap.max_mah_design) {
dev_dbg(di->dev, "Remaining cap %d can't be bigger than total"
" %d\n", cap, di->bat_cap.max_mah_design);
cap = di->bat_cap.max_mah_design;
}
ab8500_fg_fill_cap_sample(di, di->bat_cap.user_mah);
di->bat_cap.permille = ab8500_fg_convert_mah_to_permille(di, cap);
di->bat_cap.mah = cap;
ab8500_fg_check_capacity_limits(di, true);
}
static bool check_sysfs_capacity(struct ab8500_fg *di)
{
int cap, lower, upper;
int cap_permille;
cap = di->bat_cap.user_mah;
cap_permille = ab8500_fg_convert_mah_to_permille(di,
di->bat_cap.user_mah);
lower = di->bat_cap.permille - di->bm->fg_params->user_cap_limit * 10;
upper = di->bat_cap.permille + di->bm->fg_params->user_cap_limit * 10;
if (lower < 0)
lower = 0;
/* 1000 is permille, -> 100 percent */
if (upper > 1000)
upper = 1000;
dev_dbg(di->dev, "Capacity limits:"
" (Lower: %d User: %d Upper: %d) [user: %d, was: %d]\n",
lower, cap_permille, upper, cap, di->bat_cap.mah);
/* If within limits, use the saved capacity and exit estimation...*/
if (cap_permille > lower && cap_permille < upper) {
dev_dbg(di->dev, "OK! Using users cap %d uAh now\n", cap);
force_capacity(di);
return true;
}
dev_dbg(di->dev, "Capacity from user out of limits, ignoring");
return false;
}
/**
* ab8500_fg_algorithm_discharging() - FG algorithm for when discharging
* @di: pointer to the ab8500_fg structure
*
* Battery capacity calculation state machine for when we're discharging
*/
static void ab8500_fg_algorithm_discharging(struct ab8500_fg *di)
{
int sleep_time;
/* If we change to charge mode we should start with init */
if (di->charge_state != AB8500_FG_CHARGE_INIT)
ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT);
switch (di->discharge_state) {
case AB8500_FG_DISCHARGE_INIT:
/* We use the FG IRQ to work on */
di->init_cnt = 0;
di->fg_samples = SEC_TO_SAMPLE(di->bm->fg_params->init_timer);
ab8500_fg_coulomb_counter(di, true);
ab8500_fg_discharge_state_to(di,
AB8500_FG_DISCHARGE_INITMEASURING);
fallthrough;
case AB8500_FG_DISCHARGE_INITMEASURING:
/*
* Discard a number of samples during startup.
* After that, use compensated voltage for a few
* samples to get an initial capacity.
* Then go to READOUT
*/
sleep_time = di->bm->fg_params->init_timer;
/* Discard the first [x] seconds */
if (di->init_cnt > di->bm->fg_params->init_discard_time) {
ab8500_fg_calc_cap_discharge_voltage(di);
ab8500_fg_check_capacity_limits(di, true);
}
di->init_cnt += sleep_time;
if (di->init_cnt > di->bm->fg_params->init_total_time)
ab8500_fg_discharge_state_to(di,
AB8500_FG_DISCHARGE_READOUT_INIT);
break;
case AB8500_FG_DISCHARGE_INIT_RECOVERY:
di->recovery_cnt = 0;
di->recovery_needed = true;
ab8500_fg_discharge_state_to(di,
AB8500_FG_DISCHARGE_RECOVERY);
fallthrough;
case AB8500_FG_DISCHARGE_RECOVERY:
sleep_time = di->bm->fg_params->recovery_sleep_timer;
/*
* We should check the power consumption
* If low, go to READOUT (after x min) or
* RECOVERY_SLEEP if time left.
* If high, go to READOUT
*/
di->inst_curr_ua = ab8500_fg_inst_curr_blocking(di);
if (ab8500_fg_is_low_curr(di, di->inst_curr_ua)) {
if (di->recovery_cnt >
di->bm->fg_params->recovery_total_time) {
di->fg_samples = SEC_TO_SAMPLE(
di->bm->fg_params->accu_high_curr);
ab8500_fg_coulomb_counter(di, true);
ab8500_fg_discharge_state_to(di,
AB8500_FG_DISCHARGE_READOUT);
di->recovery_needed = false;
} else {
queue_delayed_work(di->fg_wq,
&di->fg_periodic_work,
sleep_time * HZ);
}
di->recovery_cnt += sleep_time;
} else {
di->fg_samples = SEC_TO_SAMPLE(
di->bm->fg_params->accu_high_curr);
ab8500_fg_coulomb_counter(di, true);
ab8500_fg_discharge_state_to(di,
AB8500_FG_DISCHARGE_READOUT);
}
break;
case AB8500_FG_DISCHARGE_READOUT_INIT:
di->fg_samples = SEC_TO_SAMPLE(
di->bm->fg_params->accu_high_curr);
ab8500_fg_coulomb_counter(di, true);
ab8500_fg_discharge_state_to(di,
AB8500_FG_DISCHARGE_READOUT);
break;
case AB8500_FG_DISCHARGE_READOUT:
di->inst_curr_ua = ab8500_fg_inst_curr_blocking(di);
if (ab8500_fg_is_low_curr(di, di->inst_curr_ua)) {
/* Detect mode change */
if (di->high_curr_mode) {
di->high_curr_mode = false;
di->high_curr_cnt = 0;
}
if (di->recovery_needed) {
ab8500_fg_discharge_state_to(di,
AB8500_FG_DISCHARGE_INIT_RECOVERY);
queue_delayed_work(di->fg_wq,
&di->fg_periodic_work, 0);
break;
}
ab8500_fg_calc_cap_discharge_voltage(di);
} else {
mutex_lock(&di->cc_lock);
if (!di->flags.conv_done) {
/* Wasn't the CC IRQ that got us here */
mutex_unlock(&di->cc_lock);
dev_dbg(di->dev, "%s CC conv not done\n",
__func__);
break;
}
di->flags.conv_done = false;
mutex_unlock(&di->cc_lock);
/* Detect mode change */
if (!di->high_curr_mode) {
di->high_curr_mode = true;
di->high_curr_cnt = 0;
}
di->high_curr_cnt +=
di->bm->fg_params->accu_high_curr;
if (di->high_curr_cnt >
di->bm->fg_params->high_curr_time)
di->recovery_needed = true;
ab8500_fg_calc_cap_discharge_fg(di);
}
ab8500_fg_check_capacity_limits(di, false);
break;
case AB8500_FG_DISCHARGE_WAKEUP:
ab8500_fg_calc_cap_discharge_voltage(di);
di->fg_samples = SEC_TO_SAMPLE(
di->bm->fg_params->accu_high_curr);
ab8500_fg_coulomb_counter(di, true);
ab8500_fg_discharge_state_to(di,
AB8500_FG_DISCHARGE_READOUT);
ab8500_fg_check_capacity_limits(di, false);
break;
default:
break;
}
}
/**
* ab8500_fg_algorithm_calibrate() - Internal columb counter offset calibration
* @di: pointer to the ab8500_fg structure
*
*/
static void ab8500_fg_algorithm_calibrate(struct ab8500_fg *di)
{
int ret;
switch (di->calib_state) {
case AB8500_FG_CALIB_INIT:
dev_dbg(di->dev, "Calibration ongoing...\n");
ret = abx500_mask_and_set_register_interruptible(di->dev,
AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG,
CC_INT_CAL_N_AVG_MASK, CC_INT_CAL_SAMPLES_8);
if (ret < 0)
goto err;
ret = abx500_mask_and_set_register_interruptible(di->dev,
AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG,
CC_INTAVGOFFSET_ENA, CC_INTAVGOFFSET_ENA);
if (ret < 0)
goto err;
di->calib_state = AB8500_FG_CALIB_WAIT;
break;
case AB8500_FG_CALIB_END:
ret = abx500_mask_and_set_register_interruptible(di->dev,
AB8500_GAS_GAUGE, AB8500_GASG_CC_CTRL_REG,
CC_MUXOFFSET, CC_MUXOFFSET);
if (ret < 0)
goto err;
di->flags.calibrate = false;
dev_dbg(di->dev, "Calibration done...\n");
queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0);
break;
case AB8500_FG_CALIB_WAIT:
dev_dbg(di->dev, "Calibration WFI\n");
break;
default:
break;
}
return;
err:
/* Something went wrong, don't calibrate then */
dev_err(di->dev, "failed to calibrate the CC\n");
di->flags.calibrate = false;
di->calib_state = AB8500_FG_CALIB_INIT;
queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0);
}
/**
* ab8500_fg_algorithm() - Entry point for the FG algorithm
* @di: pointer to the ab8500_fg structure
*
* Entry point for the battery capacity calculation state machine
*/
static void ab8500_fg_algorithm(struct ab8500_fg *di)
{
if (di->flags.calibrate)
ab8500_fg_algorithm_calibrate(di);
else {
if (di->flags.charging)
ab8500_fg_algorithm_charging(di);
else
ab8500_fg_algorithm_discharging(di);
}
dev_dbg(di->dev, "[FG_DATA] %d %d %d %d %d %d %d %d %d %d "
"%d %d %d %d %d %d %d\n",
di->bat_cap.max_mah_design,
di->bat_cap.max_mah,
di->bat_cap.mah,
di->bat_cap.permille,
di->bat_cap.level,
di->bat_cap.prev_mah,
di->bat_cap.prev_percent,
di->bat_cap.prev_level,
di->vbat_uv,
di->inst_curr_ua,
di->avg_curr_ua,
di->accu_charge,
di->flags.charging,
di->charge_state,
di->discharge_state,
di->high_curr_mode,
di->recovery_needed);
}
/**
* ab8500_fg_periodic_work() - Run the FG state machine periodically
* @work: pointer to the work_struct structure
*
* Work queue function for periodic work
*/
static void ab8500_fg_periodic_work(struct work_struct *work)
{
struct ab8500_fg *di = container_of(work, struct ab8500_fg,
fg_periodic_work.work);
if (di->init_capacity) {
/* Get an initial capacity calculation */
ab8500_fg_calc_cap_discharge_voltage(di);
ab8500_fg_check_capacity_limits(di, true);
di->init_capacity = false;
queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0);
} else if (di->flags.user_cap) {
if (check_sysfs_capacity(di)) {
ab8500_fg_check_capacity_limits(di, true);
if (di->flags.charging)
ab8500_fg_charge_state_to(di,
AB8500_FG_CHARGE_INIT);
else
ab8500_fg_discharge_state_to(di,
AB8500_FG_DISCHARGE_READOUT_INIT);
}
di->flags.user_cap = false;
queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0);
} else
ab8500_fg_algorithm(di);
}
/**
* ab8500_fg_check_hw_failure_work() - Check OVV_BAT condition
* @work: pointer to the work_struct structure
*
* Work queue function for checking the OVV_BAT condition
*/
static void ab8500_fg_check_hw_failure_work(struct work_struct *work)
{
int ret;
u8 reg_value;
struct ab8500_fg *di = container_of(work, struct ab8500_fg,
fg_check_hw_failure_work.work);
/*
* If we have had a battery over-voltage situation,
* check ovv-bit to see if it should be reset.
*/
ret = abx500_get_register_interruptible(di->dev,
AB8500_CHARGER, AB8500_CH_STAT_REG,
®_value);
if (ret < 0) {
dev_err(di->dev, "%s ab8500 read failed\n", __func__);
return;
}
if ((reg_value & BATT_OVV) == BATT_OVV) {
if (!di->flags.bat_ovv) {
dev_dbg(di->dev, "Battery OVV\n");
di->flags.bat_ovv = true;
power_supply_changed(di->fg_psy);
}
/* Not yet recovered from ovv, reschedule this test */
queue_delayed_work(di->fg_wq, &di->fg_check_hw_failure_work,
HZ);
} else {
dev_dbg(di->dev, "Battery recovered from OVV\n");
di->flags.bat_ovv = false;
power_supply_changed(di->fg_psy);
}
}
/**
* ab8500_fg_low_bat_work() - Check LOW_BAT condition
* @work: pointer to the work_struct structure
*
* Work queue function for checking the LOW_BAT condition
*/
static void ab8500_fg_low_bat_work(struct work_struct *work)
{
int vbat_uv;
struct ab8500_fg *di = container_of(work, struct ab8500_fg,
fg_low_bat_work.work);
vbat_uv = ab8500_fg_bat_voltage(di);
/* Check if LOW_BAT still fulfilled */
if (vbat_uv < di->bm->fg_params->lowbat_threshold_uv) {
/* Is it time to shut down? */
if (di->low_bat_cnt < 1) {
di->flags.low_bat = true;
dev_warn(di->dev, "Shut down pending...\n");
} else {
/*
* Else we need to re-schedule this check to be able to detect
* if the voltage increases again during charging or
* due to decreasing load.
*/
di->low_bat_cnt--;
dev_warn(di->dev, "Battery voltage still LOW\n");
queue_delayed_work(di->fg_wq, &di->fg_low_bat_work,
round_jiffies(LOW_BAT_CHECK_INTERVAL));
}
} else {
di->flags.low_bat_delay = false;
di->low_bat_cnt = 10;
dev_warn(di->dev, "Battery voltage OK again\n");
}
/* This is needed to dispatch LOW_BAT */
ab8500_fg_check_capacity_limits(di, false);
}
/**
* ab8500_fg_battok_calc - calculate the bit pattern corresponding
* to the target voltage.
* @di: pointer to the ab8500_fg structure
* @target: target voltage
*
* Returns bit pattern closest to the target voltage
* valid return values are 0-14. (0-BATT_OK_MAX_NR_INCREMENTS)
*/
static int ab8500_fg_battok_calc(struct ab8500_fg *di, int target)
{
if (target > BATT_OK_MIN +
(BATT_OK_INCREMENT * BATT_OK_MAX_NR_INCREMENTS))
return BATT_OK_MAX_NR_INCREMENTS;
if (target < BATT_OK_MIN)
return 0;
return (target - BATT_OK_MIN) / BATT_OK_INCREMENT;
}
/**
* ab8500_fg_battok_init_hw_register - init battok levels
* @di: pointer to the ab8500_fg structure
*
*/
static int ab8500_fg_battok_init_hw_register(struct ab8500_fg *di)
{
int selected;
int sel0;
int sel1;
int cbp_sel0;
int cbp_sel1;
int ret;
int new_val;
sel0 = di->bm->fg_params->battok_falling_th_sel0;
sel1 = di->bm->fg_params->battok_raising_th_sel1;
cbp_sel0 = ab8500_fg_battok_calc(di, sel0);
cbp_sel1 = ab8500_fg_battok_calc(di, sel1);
selected = BATT_OK_MIN + cbp_sel0 * BATT_OK_INCREMENT;
if (selected != sel0)
dev_warn(di->dev, "Invalid voltage step:%d, using %d %d\n",
sel0, selected, cbp_sel0);
selected = BATT_OK_MIN + cbp_sel1 * BATT_OK_INCREMENT;
if (selected != sel1)
dev_warn(di->dev, "Invalid voltage step:%d, using %d %d\n",
sel1, selected, cbp_sel1);
new_val = cbp_sel0 | (cbp_sel1 << 4);
dev_dbg(di->dev, "using: %x %d %d\n", new_val, cbp_sel0, cbp_sel1);
ret = abx500_set_register_interruptible(di->dev, AB8500_SYS_CTRL2_BLOCK,
AB8500_BATT_OK_REG, new_val);
return ret;
}
/**
* ab8500_fg_instant_work() - Run the FG state machine instantly
* @work: pointer to the work_struct structure
*
* Work queue function for instant work
*/
static void ab8500_fg_instant_work(struct work_struct *work)
{
struct ab8500_fg *di = container_of(work, struct ab8500_fg, fg_work);
ab8500_fg_algorithm(di);
}
/**
* ab8500_fg_cc_data_end_handler() - end of data conversion isr.
* @irq: interrupt number
* @_di: pointer to the ab8500_fg structure
*
* Returns IRQ status(IRQ_HANDLED)
*/
static irqreturn_t ab8500_fg_cc_data_end_handler(int irq, void *_di)
{
struct ab8500_fg *di = _di;
if (!di->nbr_cceoc_irq_cnt) {
di->nbr_cceoc_irq_cnt++;
complete(&di->ab8500_fg_started);
} else {
di->nbr_cceoc_irq_cnt = 0;
complete(&di->ab8500_fg_complete);
}
return IRQ_HANDLED;
}
/**
* ab8500_fg_cc_int_calib_handler () - end of calibration isr.
* @irq: interrupt number
* @_di: pointer to the ab8500_fg structure
*
* Returns IRQ status(IRQ_HANDLED)
*/
static irqreturn_t ab8500_fg_cc_int_calib_handler(int irq, void *_di)
{
struct ab8500_fg *di = _di;
di->calib_state = AB8500_FG_CALIB_END;
queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0);
return IRQ_HANDLED;
}
/**
* ab8500_fg_cc_convend_handler() - isr to get battery avg current.
* @irq: interrupt number
* @_di: pointer to the ab8500_fg structure
*
* Returns IRQ status(IRQ_HANDLED)
*/
static irqreturn_t ab8500_fg_cc_convend_handler(int irq, void *_di)
{
struct ab8500_fg *di = _di;
queue_work(di->fg_wq, &di->fg_acc_cur_work);
return IRQ_HANDLED;
}
/**
* ab8500_fg_batt_ovv_handler() - Battery OVV occured
* @irq: interrupt number
* @_di: pointer to the ab8500_fg structure
*
* Returns IRQ status(IRQ_HANDLED)
*/
static irqreturn_t ab8500_fg_batt_ovv_handler(int irq, void *_di)
{
struct ab8500_fg *di = _di;
dev_dbg(di->dev, "Battery OVV\n");
/* Schedule a new HW failure check */
queue_delayed_work(di->fg_wq, &di->fg_check_hw_failure_work, 0);
return IRQ_HANDLED;
}
/**
* ab8500_fg_lowbatf_handler() - Battery voltage is below LOW threshold
* @irq: interrupt number
* @_di: pointer to the ab8500_fg structure
*
* Returns IRQ status(IRQ_HANDLED)
*/
static irqreturn_t ab8500_fg_lowbatf_handler(int irq, void *_di)
{
struct ab8500_fg *di = _di;
/* Initiate handling in ab8500_fg_low_bat_work() if not already initiated. */
if (!di->flags.low_bat_delay) {
dev_warn(di->dev, "Battery voltage is below LOW threshold\n");
di->flags.low_bat_delay = true;
/*
* Start a timer to check LOW_BAT again after some time
* This is done to avoid shutdown on single voltage dips
*/
queue_delayed_work(di->fg_wq, &di->fg_low_bat_work,
round_jiffies(LOW_BAT_CHECK_INTERVAL));
}
return IRQ_HANDLED;
}
/**
* ab8500_fg_get_property() - get the fg properties
* @psy: pointer to the power_supply structure
* @psp: pointer to the power_supply_property structure
* @val: pointer to the power_supply_propval union
*
* This function gets called when an application tries to get the
* fg properties by reading the sysfs files.
* voltage_now: battery voltage
* current_now: battery instant current
* current_avg: battery average current
* charge_full_design: capacity where battery is considered full
* charge_now: battery capacity in nAh
* capacity: capacity in percent
* capacity_level: capacity level
*
* Returns error code in case of failure else 0 on success
*/
static int ab8500_fg_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct ab8500_fg *di = power_supply_get_drvdata(psy);
/*
* If battery is identified as unknown and charging of unknown
* batteries is disabled, we always report 100% capacity and
* capacity level UNKNOWN, since we can't calculate
* remaining capacity
*/
switch (psp) {
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
if (di->flags.bat_ovv)
val->intval = BATT_OVV_VALUE;
else
val->intval = di->vbat_uv;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
val->intval = di->inst_curr_ua;
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
val->intval = di->avg_curr_ua;
break;
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
val->intval = ab8500_fg_convert_mah_to_uwh(di,
di->bat_cap.max_mah_design);
break;
case POWER_SUPPLY_PROP_ENERGY_FULL:
val->intval = ab8500_fg_convert_mah_to_uwh(di,
di->bat_cap.max_mah);
break;
case POWER_SUPPLY_PROP_ENERGY_NOW:
if (di->flags.batt_unknown && !di->bm->chg_unknown_bat &&
di->flags.batt_id_received)
val->intval = ab8500_fg_convert_mah_to_uwh(di,
di->bat_cap.max_mah);
else
val->intval = ab8500_fg_convert_mah_to_uwh(di,
di->bat_cap.prev_mah);
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
val->intval = di->bat_cap.max_mah_design;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
val->intval = di->bat_cap.max_mah;
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
if (di->flags.batt_unknown && !di->bm->chg_unknown_bat &&
di->flags.batt_id_received)
val->intval = di->bat_cap.max_mah;
else
val->intval = di->bat_cap.prev_mah;
break;
case POWER_SUPPLY_PROP_CAPACITY:
if (di->flags.batt_unknown && !di->bm->chg_unknown_bat &&
di->flags.batt_id_received)
val->intval = 100;
else
val->intval = di->bat_cap.prev_percent;
break;
case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
if (di->flags.batt_unknown && !di->bm->chg_unknown_bat &&
di->flags.batt_id_received)
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
else
val->intval = di->bat_cap.prev_level;
break;
default:
return -EINVAL;
}
return 0;
}
static int ab8500_fg_get_ext_psy_data(struct device *dev, void *data)
{
struct power_supply *psy;
struct power_supply *ext = dev_get_drvdata(dev);
const char **supplicants = (const char **)ext->supplied_to;
struct ab8500_fg *di;
struct power_supply_battery_info *bi;
union power_supply_propval ret;
int j;
psy = (struct power_supply *)data;
di = power_supply_get_drvdata(psy);
bi = di->bm->bi;
/*
* For all psy where the name of your driver
* appears in any supplied_to
*/
j = match_string(supplicants, ext->num_supplicants, psy->desc->name);
if (j < 0)
return 0;
/* Go through all properties for the psy */
for (j = 0; j < ext->desc->num_properties; j++) {
enum power_supply_property prop;
prop = ext->desc->properties[j];
if (power_supply_get_property(ext, prop, &ret))
continue;
switch (prop) {
case POWER_SUPPLY_PROP_STATUS:
switch (ext->desc->type) {
case POWER_SUPPLY_TYPE_BATTERY:
switch (ret.intval) {
case POWER_SUPPLY_STATUS_UNKNOWN:
case POWER_SUPPLY_STATUS_DISCHARGING:
case POWER_SUPPLY_STATUS_NOT_CHARGING:
if (!di->flags.charging)
break;
di->flags.charging = false;
di->flags.fully_charged = false;
if (di->bm->capacity_scaling)
ab8500_fg_update_cap_scalers(di);
queue_work(di->fg_wq, &di->fg_work);
break;
case POWER_SUPPLY_STATUS_FULL:
if (di->flags.fully_charged)
break;
di->flags.fully_charged = true;
di->flags.force_full = true;
/* Save current capacity as maximum */
di->bat_cap.max_mah = di->bat_cap.mah;
queue_work(di->fg_wq, &di->fg_work);
break;
case POWER_SUPPLY_STATUS_CHARGING:
if (di->flags.charging &&
!di->flags.fully_charged)
break;
di->flags.charging = true;
di->flags.fully_charged = false;
if (di->bm->capacity_scaling)
ab8500_fg_update_cap_scalers(di);
queue_work(di->fg_wq, &di->fg_work);
break;
}
break;
default:
break;
}
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
switch (ext->desc->type) {
case POWER_SUPPLY_TYPE_BATTERY:
if (!di->flags.batt_id_received &&
(bi && (bi->technology !=
POWER_SUPPLY_TECHNOLOGY_UNKNOWN))) {
di->flags.batt_id_received = true;
di->bat_cap.max_mah_design =
di->bm->bi->charge_full_design_uah;
di->bat_cap.max_mah =
di->bat_cap.max_mah_design;
di->vbat_nom_uv =
di->bm->bi->voltage_max_design_uv;
}
if (ret.intval)
di->flags.batt_unknown = false;
else
di->flags.batt_unknown = true;
break;
default:
break;
}
break;
case POWER_SUPPLY_PROP_TEMP:
switch (ext->desc->type) {
case POWER_SUPPLY_TYPE_BATTERY:
if (di->flags.batt_id_received)
di->bat_temp = ret.intval;
break;
default:
break;
}
break;
default:
break;
}
}
return 0;
}
/**
* ab8500_fg_init_hw_registers() - Set up FG related registers
* @di: pointer to the ab8500_fg structure
*
* Set up battery OVV, low battery voltage registers
*/
static int ab8500_fg_init_hw_registers(struct ab8500_fg *di)
{
int ret;
/*
* Set VBAT OVV (overvoltage) threshold to 4.75V (typ) this is what
* the hardware supports, nothing else can be configured in hardware.
* See this as an "outer limit" where the charger will certainly
* shut down. Other (lower) overvoltage levels need to be implemented
* in software.
*/
ret = abx500_mask_and_set_register_interruptible(di->dev,
AB8500_CHARGER,
AB8500_BATT_OVV,
BATT_OVV_TH_4P75,
BATT_OVV_TH_4P75);
if (ret) {
dev_err(di->dev, "failed to set BATT_OVV\n");
goto out;
}
/* Enable VBAT OVV detection */
ret = abx500_mask_and_set_register_interruptible(di->dev,
AB8500_CHARGER,
AB8500_BATT_OVV,
BATT_OVV_ENA,
BATT_OVV_ENA);
if (ret) {
dev_err(di->dev, "failed to enable BATT_OVV\n");
goto out;
}
/* Low Battery Voltage */
ret = abx500_set_register_interruptible(di->dev,
AB8500_SYS_CTRL2_BLOCK,
AB8500_LOW_BAT_REG,
ab8500_volt_to_regval(
di->bm->fg_params->lowbat_threshold_uv) << 1 |
LOW_BAT_ENABLE);
if (ret) {
dev_err(di->dev, "%s write failed\n", __func__);
goto out;
}
/* Battery OK threshold */
ret = ab8500_fg_battok_init_hw_register(di);
if (ret) {
dev_err(di->dev, "BattOk init write failed.\n");
goto out;
}
if (is_ab8505(di->parent)) {
ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_MAX_TIME_REG, di->bm->fg_params->pcut_max_time);
if (ret) {
dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_MAX_TIME_REG\n", __func__);
goto out;
}
ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_FLAG_TIME_REG, di->bm->fg_params->pcut_flag_time);
if (ret) {
dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_FLAG_TIME_REG\n", __func__);
goto out;
}
ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_RESTART_REG, di->bm->fg_params->pcut_max_restart);
if (ret) {
dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_RESTART_REG\n", __func__);
goto out;
}
ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_DEBOUNCE_REG, di->bm->fg_params->pcut_debounce_time);
if (ret) {
dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_DEBOUNCE_REG\n", __func__);
goto out;
}
ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_CTL_STATUS_REG, di->bm->fg_params->pcut_enable);
if (ret) {
dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_CTL_STATUS_REG\n", __func__);
goto out;
}
}
out:
return ret;
}
/**
* ab8500_fg_external_power_changed() - callback for power supply changes
* @psy: pointer to the structure power_supply
*
* This function is the entry point of the pointer external_power_changed
* of the structure power_supply.
* This function gets executed when there is a change in any external power
* supply that this driver needs to be notified of.
*/
static void ab8500_fg_external_power_changed(struct power_supply *psy)
{
class_for_each_device(power_supply_class, NULL, psy,
ab8500_fg_get_ext_psy_data);
}
/**
* ab8500_fg_reinit_work() - work to reset the FG algorithm
* @work: pointer to the work_struct structure
*
* Used to reset the current battery capacity to be able to
* retrigger a new voltage base capacity calculation. For
* test and verification purpose.
*/
static void ab8500_fg_reinit_work(struct work_struct *work)
{
struct ab8500_fg *di = container_of(work, struct ab8500_fg,
fg_reinit_work.work);
if (!di->flags.calibrate) {
dev_dbg(di->dev, "Resetting FG state machine to init.\n");
ab8500_fg_clear_cap_samples(di);
ab8500_fg_calc_cap_discharge_voltage(di);
ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT);
ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_INIT);
queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0);
} else {
dev_err(di->dev, "Residual offset calibration ongoing "
"retrying..\n");
/* Wait one second until next try*/
queue_delayed_work(di->fg_wq, &di->fg_reinit_work,
round_jiffies(1));
}
}
/* Exposure to the sysfs interface */
struct ab8500_fg_sysfs_entry {
struct attribute attr;
ssize_t (*show)(struct ab8500_fg *, char *);
ssize_t (*store)(struct ab8500_fg *, const char *, size_t);
};
static ssize_t charge_full_show(struct ab8500_fg *di, char *buf)
{
return sysfs_emit(buf, "%d\n", di->bat_cap.max_mah);
}
static ssize_t charge_full_store(struct ab8500_fg *di, const char *buf,
size_t count)
{
unsigned long charge_full;
int ret;
ret = kstrtoul(buf, 10, &charge_full);
if (ret)
return ret;
di->bat_cap.max_mah = (int) charge_full;
return count;
}
static ssize_t charge_now_show(struct ab8500_fg *di, char *buf)
{
return sysfs_emit(buf, "%d\n", di->bat_cap.prev_mah);
}
static ssize_t charge_now_store(struct ab8500_fg *di, const char *buf,
size_t count)
{
unsigned long charge_now;
int ret;
ret = kstrtoul(buf, 10, &charge_now);
if (ret)
return ret;
di->bat_cap.user_mah = (int) charge_now;
di->flags.user_cap = true;
queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0);
return count;
}
static struct ab8500_fg_sysfs_entry charge_full_attr =
__ATTR(charge_full, 0644, charge_full_show, charge_full_store);
static struct ab8500_fg_sysfs_entry charge_now_attr =
__ATTR(charge_now, 0644, charge_now_show, charge_now_store);
static ssize_t
ab8500_fg_show(struct kobject *kobj, struct attribute *attr, char *buf)
{
struct ab8500_fg_sysfs_entry *entry;
struct ab8500_fg *di;
entry = container_of(attr, struct ab8500_fg_sysfs_entry, attr);
di = container_of(kobj, struct ab8500_fg, fg_kobject);
if (!entry->show)
return -EIO;
return entry->show(di, buf);
}
static ssize_t
ab8500_fg_store(struct kobject *kobj, struct attribute *attr, const char *buf,
size_t count)
{
struct ab8500_fg_sysfs_entry *entry;
struct ab8500_fg *di;
entry = container_of(attr, struct ab8500_fg_sysfs_entry, attr);
di = container_of(kobj, struct ab8500_fg, fg_kobject);
if (!entry->store)
return -EIO;
return entry->store(di, buf, count);
}
static const struct sysfs_ops ab8500_fg_sysfs_ops = {
.show = ab8500_fg_show,
.store = ab8500_fg_store,
};
static struct attribute *ab8500_fg_attrs[] = {
&charge_full_attr.attr,
&charge_now_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(ab8500_fg);
static struct kobj_type ab8500_fg_ktype = {
.sysfs_ops = &ab8500_fg_sysfs_ops,
.default_groups = ab8500_fg_groups,
};
/**
* ab8500_fg_sysfs_exit() - de-init of sysfs entry
* @di: pointer to the struct ab8500_chargalg
*
* This function removes the entry in sysfs.
*/
static void ab8500_fg_sysfs_exit(struct ab8500_fg *di)
{
kobject_del(&di->fg_kobject);
}
/**
* ab8500_fg_sysfs_init() - init of sysfs entry
* @di: pointer to the struct ab8500_chargalg
*
* This function adds an entry in sysfs.
* Returns error code in case of failure else 0(on success)
*/
static int ab8500_fg_sysfs_init(struct ab8500_fg *di)
{
int ret = 0;
ret = kobject_init_and_add(&di->fg_kobject,
&ab8500_fg_ktype,
NULL, "battery");
if (ret < 0) {
kobject_put(&di->fg_kobject);
dev_err(di->dev, "failed to create sysfs entry\n");
}
return ret;
}
static ssize_t ab8505_powercut_flagtime_read(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int ret;
u8 reg_value;
struct power_supply *psy = dev_get_drvdata(dev);
struct ab8500_fg *di = power_supply_get_drvdata(psy);
ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_FLAG_TIME_REG, ®_value);
if (ret < 0) {
dev_err(dev, "Failed to read AB8505_RTC_PCUT_FLAG_TIME_REG\n");
goto fail;
}
return sysfs_emit(buf, "%d\n", (reg_value & 0x7F));
fail:
return ret;
}
static ssize_t ab8505_powercut_flagtime_write(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
int reg_value;
struct power_supply *psy = dev_get_drvdata(dev);
struct ab8500_fg *di = power_supply_get_drvdata(psy);
if (kstrtoint(buf, 10, ®_value))
goto fail;
if (reg_value > 0x7F) {
dev_err(dev, "Incorrect parameter, echo 0 (1.98s) - 127 (15.625ms) for flagtime\n");
goto fail;
}
ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_FLAG_TIME_REG, (u8)reg_value);
if (ret < 0)
dev_err(dev, "Failed to set AB8505_RTC_PCUT_FLAG_TIME_REG\n");
fail:
return count;
}
static ssize_t ab8505_powercut_maxtime_read(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int ret;
u8 reg_value;
struct power_supply *psy = dev_get_drvdata(dev);
struct ab8500_fg *di = power_supply_get_drvdata(psy);
ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_MAX_TIME_REG, ®_value);
if (ret < 0) {
dev_err(dev, "Failed to read AB8505_RTC_PCUT_MAX_TIME_REG\n");
goto fail;
}
return sysfs_emit(buf, "%d\n", (reg_value & 0x7F));
fail:
return ret;
}
static ssize_t ab8505_powercut_maxtime_write(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
int reg_value;
struct power_supply *psy = dev_get_drvdata(dev);
struct ab8500_fg *di = power_supply_get_drvdata(psy);
if (kstrtoint(buf, 10, ®_value))
goto fail;
if (reg_value > 0x7F) {
dev_err(dev, "Incorrect parameter, echo 0 (0.0s) - 127 (1.98s) for maxtime\n");
goto fail;
}
ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_MAX_TIME_REG, (u8)reg_value);
if (ret < 0)
dev_err(dev, "Failed to set AB8505_RTC_PCUT_MAX_TIME_REG\n");
fail:
return count;
}
static ssize_t ab8505_powercut_restart_read(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int ret;
u8 reg_value;
struct power_supply *psy = dev_get_drvdata(dev);
struct ab8500_fg *di = power_supply_get_drvdata(psy);
ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_RESTART_REG, ®_value);
if (ret < 0) {
dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n");
goto fail;
}
return sysfs_emit(buf, "%d\n", (reg_value & 0xF));
fail:
return ret;
}
static ssize_t ab8505_powercut_restart_write(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
int reg_value;
struct power_supply *psy = dev_get_drvdata(dev);
struct ab8500_fg *di = power_supply_get_drvdata(psy);
if (kstrtoint(buf, 10, ®_value))
goto fail;
if (reg_value > 0xF) {
dev_err(dev, "Incorrect parameter, echo 0 - 15 for number of restart\n");
goto fail;
}
ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_RESTART_REG, (u8)reg_value);
if (ret < 0)
dev_err(dev, "Failed to set AB8505_RTC_PCUT_RESTART_REG\n");
fail:
return count;
}
static ssize_t ab8505_powercut_timer_read(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int ret;
u8 reg_value;
struct power_supply *psy = dev_get_drvdata(dev);
struct ab8500_fg *di = power_supply_get_drvdata(psy);
ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_TIME_REG, ®_value);
if (ret < 0) {
dev_err(dev, "Failed to read AB8505_RTC_PCUT_TIME_REG\n");
goto fail;
}
return sysfs_emit(buf, "%d\n", (reg_value & 0x7F));
fail:
return ret;
}
static ssize_t ab8505_powercut_restart_counter_read(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int ret;
u8 reg_value;
struct power_supply *psy = dev_get_drvdata(dev);
struct ab8500_fg *di = power_supply_get_drvdata(psy);
ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_RESTART_REG, ®_value);
if (ret < 0) {
dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n");
goto fail;
}
return sysfs_emit(buf, "%d\n", (reg_value & 0xF0) >> 4);
fail:
return ret;
}
static ssize_t ab8505_powercut_read(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int ret;
u8 reg_value;
struct power_supply *psy = dev_get_drvdata(dev);
struct ab8500_fg *di = power_supply_get_drvdata(psy);
ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value);
if (ret < 0)
goto fail;
return sysfs_emit(buf, "%d\n", (reg_value & 0x1));
fail:
return ret;
}
static ssize_t ab8505_powercut_write(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
int reg_value;
struct power_supply *psy = dev_get_drvdata(dev);
struct ab8500_fg *di = power_supply_get_drvdata(psy);
if (kstrtoint(buf, 10, ®_value))
goto fail;
if (reg_value > 0x1) {
dev_err(dev, "Incorrect parameter, echo 0/1 to disable/enable Pcut feature\n");
goto fail;
}
ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_CTL_STATUS_REG, (u8)reg_value);
if (ret < 0)
dev_err(dev, "Failed to set AB8505_RTC_PCUT_CTL_STATUS_REG\n");
fail:
return count;
}
static ssize_t ab8505_powercut_flag_read(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int ret;
u8 reg_value;
struct power_supply *psy = dev_get_drvdata(dev);
struct ab8500_fg *di = power_supply_get_drvdata(psy);
ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value);
if (ret < 0) {
dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n");
goto fail;
}
return sysfs_emit(buf, "%d\n", ((reg_value & 0x10) >> 4));
fail:
return ret;
}
static ssize_t ab8505_powercut_debounce_read(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int ret;
u8 reg_value;
struct power_supply *psy = dev_get_drvdata(dev);
struct ab8500_fg *di = power_supply_get_drvdata(psy);
ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_DEBOUNCE_REG, ®_value);
if (ret < 0) {
dev_err(dev, "Failed to read AB8505_RTC_PCUT_DEBOUNCE_REG\n");
goto fail;
}
return sysfs_emit(buf, "%d\n", (reg_value & 0x7));
fail:
return ret;
}
static ssize_t ab8505_powercut_debounce_write(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
int reg_value;
struct power_supply *psy = dev_get_drvdata(dev);
struct ab8500_fg *di = power_supply_get_drvdata(psy);
if (kstrtoint(buf, 10, ®_value))
goto fail;
if (reg_value > 0x7) {
dev_err(dev, "Incorrect parameter, echo 0 to 7 for debounce setting\n");
goto fail;
}
ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_DEBOUNCE_REG, (u8)reg_value);
if (ret < 0)
dev_err(dev, "Failed to set AB8505_RTC_PCUT_DEBOUNCE_REG\n");
fail:
return count;
}
static ssize_t ab8505_powercut_enable_status_read(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int ret;
u8 reg_value;
struct power_supply *psy = dev_get_drvdata(dev);
struct ab8500_fg *di = power_supply_get_drvdata(psy);
ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value);
if (ret < 0) {
dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n");
goto fail;
}
return sysfs_emit(buf, "%d\n", ((reg_value & 0x20) >> 5));
fail:
return ret;
}
static struct device_attribute ab8505_fg_sysfs_psy_attrs[] = {
__ATTR(powercut_flagtime, (S_IRUGO | S_IWUSR | S_IWGRP),
ab8505_powercut_flagtime_read, ab8505_powercut_flagtime_write),
__ATTR(powercut_maxtime, (S_IRUGO | S_IWUSR | S_IWGRP),
ab8505_powercut_maxtime_read, ab8505_powercut_maxtime_write),
__ATTR(powercut_restart_max, (S_IRUGO | S_IWUSR | S_IWGRP),
ab8505_powercut_restart_read, ab8505_powercut_restart_write),
__ATTR(powercut_timer, S_IRUGO, ab8505_powercut_timer_read, NULL),
__ATTR(powercut_restart_counter, S_IRUGO,
ab8505_powercut_restart_counter_read, NULL),
__ATTR(powercut_enable, (S_IRUGO | S_IWUSR | S_IWGRP),
ab8505_powercut_read, ab8505_powercut_write),
__ATTR(powercut_flag, S_IRUGO, ab8505_powercut_flag_read, NULL),
__ATTR(powercut_debounce_time, (S_IRUGO | S_IWUSR | S_IWGRP),
ab8505_powercut_debounce_read, ab8505_powercut_debounce_write),
__ATTR(powercut_enable_status, S_IRUGO,
ab8505_powercut_enable_status_read, NULL),
};
static int ab8500_fg_sysfs_psy_create_attrs(struct ab8500_fg *di)
{
unsigned int i;
if (is_ab8505(di->parent)) {
for (i = 0; i < ARRAY_SIZE(ab8505_fg_sysfs_psy_attrs); i++)
if (device_create_file(&di->fg_psy->dev,
&ab8505_fg_sysfs_psy_attrs[i]))
goto sysfs_psy_create_attrs_failed_ab8505;
}
return 0;
sysfs_psy_create_attrs_failed_ab8505:
dev_err(&di->fg_psy->dev, "Failed creating sysfs psy attrs for ab8505.\n");
while (i--)
device_remove_file(&di->fg_psy->dev,
&ab8505_fg_sysfs_psy_attrs[i]);
return -EIO;
}
static void ab8500_fg_sysfs_psy_remove_attrs(struct ab8500_fg *di)
{
unsigned int i;
if (is_ab8505(di->parent)) {
for (i = 0; i < ARRAY_SIZE(ab8505_fg_sysfs_psy_attrs); i++)
(void)device_remove_file(&di->fg_psy->dev,
&ab8505_fg_sysfs_psy_attrs[i]);
}
}
/* Exposure to the sysfs interface <<END>> */
static int __maybe_unused ab8500_fg_resume(struct device *dev)
{
struct ab8500_fg *di = dev_get_drvdata(dev);
/*
* Change state if we're not charging. If we're charging we will wake
* up on the FG IRQ
*/
if (!di->flags.charging) {
ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_WAKEUP);
queue_work(di->fg_wq, &di->fg_work);
}
return 0;
}
static int __maybe_unused ab8500_fg_suspend(struct device *dev)
{
struct ab8500_fg *di = dev_get_drvdata(dev);
flush_delayed_work(&di->fg_periodic_work);
flush_work(&di->fg_work);
flush_work(&di->fg_acc_cur_work);
flush_delayed_work(&di->fg_reinit_work);
flush_delayed_work(&di->fg_low_bat_work);
flush_delayed_work(&di->fg_check_hw_failure_work);
/*
* If the FG is enabled we will disable it before going to suspend
* only if we're not charging
*/
if (di->flags.fg_enabled && !di->flags.charging)
ab8500_fg_coulomb_counter(di, false);
return 0;
}
/* ab8500 fg driver interrupts and their respective isr */
static struct ab8500_fg_interrupts ab8500_fg_irq[] = {
{"NCONV_ACCU", ab8500_fg_cc_convend_handler},
{"BATT_OVV", ab8500_fg_batt_ovv_handler},
{"LOW_BAT_F", ab8500_fg_lowbatf_handler},
{"CC_INT_CALIB", ab8500_fg_cc_int_calib_handler},
{"CCEOC", ab8500_fg_cc_data_end_handler},
};
static char *supply_interface[] = {
"ab8500_chargalg",
"ab8500_usb",
};
static const struct power_supply_desc ab8500_fg_desc = {
.name = "ab8500_fg",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = ab8500_fg_props,
.num_properties = ARRAY_SIZE(ab8500_fg_props),
.get_property = ab8500_fg_get_property,
.external_power_changed = ab8500_fg_external_power_changed,
};
static int ab8500_fg_bind(struct device *dev, struct device *master,
void *data)
{
struct ab8500_fg *di = dev_get_drvdata(dev);
di->bat_cap.max_mah_design = di->bm->bi->charge_full_design_uah;
di->bat_cap.max_mah = di->bat_cap.max_mah_design;
di->vbat_nom_uv = di->bm->bi->voltage_max_design_uv;
/* Start the coulomb counter */
ab8500_fg_coulomb_counter(di, true);
/* Run the FG algorithm */
queue_delayed_work(di->fg_wq, &di->fg_periodic_work, 0);
return 0;
}
static void ab8500_fg_unbind(struct device *dev, struct device *master,
void *data)
{
struct ab8500_fg *di = dev_get_drvdata(dev);
int ret;
/* Disable coulomb counter */
ret = ab8500_fg_coulomb_counter(di, false);
if (ret)
dev_err(dev, "failed to disable coulomb counter\n");
flush_workqueue(di->fg_wq);
}
static const struct component_ops ab8500_fg_component_ops = {
.bind = ab8500_fg_bind,
.unbind = ab8500_fg_unbind,
};
static int ab8500_fg_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct power_supply_config psy_cfg = {};
struct ab8500_fg *di;
int i, irq;
int ret = 0;
di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
if (!di)
return -ENOMEM;
di->bm = &ab8500_bm_data;
mutex_init(&di->cc_lock);
/* get parent data */
di->dev = dev;
di->parent = dev_get_drvdata(pdev->dev.parent);
di->main_bat_v = devm_iio_channel_get(dev, "main_bat_v");
if (IS_ERR(di->main_bat_v)) {
ret = dev_err_probe(dev, PTR_ERR(di->main_bat_v),
"failed to get main battery ADC channel\n");
return ret;
}
if (!of_property_read_u32(dev->of_node, "line-impedance-micro-ohms",
&di->line_impedance_uohm))
dev_info(dev, "line impedance: %u uOhm\n",
di->line_impedance_uohm);
psy_cfg.supplied_to = supply_interface;
psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
psy_cfg.drv_data = di;
di->init_capacity = true;
ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT);
ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_INIT);
/* Create a work queue for running the FG algorithm */
di->fg_wq = alloc_ordered_workqueue("ab8500_fg_wq", WQ_MEM_RECLAIM);
if (di->fg_wq == NULL) {
dev_err(dev, "failed to create work queue\n");
return -ENOMEM;
}
/* Init work for running the fg algorithm instantly */
INIT_WORK(&di->fg_work, ab8500_fg_instant_work);
/* Init work for getting the battery accumulated current */
INIT_WORK(&di->fg_acc_cur_work, ab8500_fg_acc_cur_work);
/* Init work for reinitialising the fg algorithm */
INIT_DEFERRABLE_WORK(&di->fg_reinit_work,
ab8500_fg_reinit_work);
/* Work delayed Queue to run the state machine */
INIT_DEFERRABLE_WORK(&di->fg_periodic_work,
ab8500_fg_periodic_work);
/* Work to check low battery condition */
INIT_DEFERRABLE_WORK(&di->fg_low_bat_work,
ab8500_fg_low_bat_work);
/* Init work for HW failure check */
INIT_DEFERRABLE_WORK(&di->fg_check_hw_failure_work,
ab8500_fg_check_hw_failure_work);
/* Reset battery low voltage flag */
di->flags.low_bat = false;
/* Initialize low battery counter */
di->low_bat_cnt = 10;
/* Initialize OVV, and other registers */
ret = ab8500_fg_init_hw_registers(di);
if (ret) {
dev_err(dev, "failed to initialize registers\n");
destroy_workqueue(di->fg_wq);
return ret;
}
/* Consider battery unknown until we're informed otherwise */
di->flags.batt_unknown = true;
di->flags.batt_id_received = false;
/* Register FG power supply class */
di->fg_psy = devm_power_supply_register(dev, &ab8500_fg_desc, &psy_cfg);
if (IS_ERR(di->fg_psy)) {
dev_err(dev, "failed to register FG psy\n");
destroy_workqueue(di->fg_wq);
return PTR_ERR(di->fg_psy);
}
di->fg_samples = SEC_TO_SAMPLE(di->bm->fg_params->init_timer);
/*
* Initialize completion used to notify completion and start
* of inst current
*/
init_completion(&di->ab8500_fg_started);
init_completion(&di->ab8500_fg_complete);
/* Register primary interrupt handlers */
for (i = 0; i < ARRAY_SIZE(ab8500_fg_irq); i++) {
irq = platform_get_irq_byname(pdev, ab8500_fg_irq[i].name);
if (irq < 0) {
destroy_workqueue(di->fg_wq);
return irq;
}
ret = devm_request_threaded_irq(dev, irq, NULL,
ab8500_fg_irq[i].isr,
IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT,
ab8500_fg_irq[i].name, di);
if (ret != 0) {
dev_err(dev, "failed to request %s IRQ %d: %d\n",
ab8500_fg_irq[i].name, irq, ret);
destroy_workqueue(di->fg_wq);
return ret;
}
dev_dbg(dev, "Requested %s IRQ %d: %d\n",
ab8500_fg_irq[i].name, irq, ret);
}
di->irq = platform_get_irq_byname(pdev, "CCEOC");
disable_irq(di->irq);
di->nbr_cceoc_irq_cnt = 0;
platform_set_drvdata(pdev, di);
ret = ab8500_fg_sysfs_init(di);
if (ret) {
dev_err(dev, "failed to create sysfs entry\n");
destroy_workqueue(di->fg_wq);
return ret;
}
ret = ab8500_fg_sysfs_psy_create_attrs(di);
if (ret) {
dev_err(dev, "failed to create FG psy\n");
ab8500_fg_sysfs_exit(di);
destroy_workqueue(di->fg_wq);
return ret;
}
/* Calibrate the fg first time */
di->flags.calibrate = true;
di->calib_state = AB8500_FG_CALIB_INIT;
/* Use room temp as default value until we get an update from driver. */
di->bat_temp = 210;
list_add_tail(&di->node, &ab8500_fg_list);
return component_add(dev, &ab8500_fg_component_ops);
}
static int ab8500_fg_remove(struct platform_device *pdev)
{
struct ab8500_fg *di = platform_get_drvdata(pdev);
destroy_workqueue(di->fg_wq);
component_del(&pdev->dev, &ab8500_fg_component_ops);
list_del(&di->node);
ab8500_fg_sysfs_exit(di);
ab8500_fg_sysfs_psy_remove_attrs(di);
return 0;
}
static SIMPLE_DEV_PM_OPS(ab8500_fg_pm_ops, ab8500_fg_suspend, ab8500_fg_resume);
static const struct of_device_id ab8500_fg_match[] = {
{ .compatible = "stericsson,ab8500-fg", },
{ },
};
MODULE_DEVICE_TABLE(of, ab8500_fg_match);
struct platform_driver ab8500_fg_driver = {
.probe = ab8500_fg_probe,
.remove = ab8500_fg_remove,
.driver = {
.name = "ab8500-fg",
.of_match_table = ab8500_fg_match,
.pm = &ab8500_fg_pm_ops,
},
};
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Johan Palsson, Karl Komierowski");
MODULE_ALIAS("platform:ab8500-fg");
MODULE_DESCRIPTION("AB8500 Fuel Gauge driver");
| linux-master | drivers/power/supply/ab8500_fg.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Gas Gauge driver for SBS Compliant Batteries
*
* Copyright (c) 2010, NVIDIA Corporation.
*/
#include <linux/bits.h>
#include <linux/delay.h>
#include <linux/devm-helpers.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/of.h>
#include <linux/power/sbs-battery.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
#include <linux/stat.h>
enum {
REG_MANUFACTURER_DATA,
REG_BATTERY_MODE,
REG_TEMPERATURE,
REG_VOLTAGE,
REG_CURRENT_NOW,
REG_CURRENT_AVG,
REG_MAX_ERR,
REG_CAPACITY,
REG_TIME_TO_EMPTY_NOW,
REG_TIME_TO_EMPTY_AVG,
REG_TIME_TO_FULL_AVG,
REG_STATUS,
REG_CAPACITY_LEVEL,
REG_CYCLE_COUNT,
REG_SERIAL_NUMBER,
REG_REMAINING_CAPACITY,
REG_REMAINING_CAPACITY_CHARGE,
REG_FULL_CHARGE_CAPACITY,
REG_FULL_CHARGE_CAPACITY_CHARGE,
REG_DESIGN_CAPACITY,
REG_DESIGN_CAPACITY_CHARGE,
REG_DESIGN_VOLTAGE_MIN,
REG_DESIGN_VOLTAGE_MAX,
REG_CHEMISTRY,
REG_MANUFACTURER,
REG_MODEL_NAME,
REG_CHARGE_CURRENT,
REG_CHARGE_VOLTAGE,
};
#define REG_ADDR_SPEC_INFO 0x1A
#define SPEC_INFO_VERSION_MASK GENMASK(7, 4)
#define SPEC_INFO_VERSION_SHIFT 4
#define SBS_VERSION_1_0 1
#define SBS_VERSION_1_1 2
#define SBS_VERSION_1_1_WITH_PEC 3
#define REG_ADDR_MANUFACTURE_DATE 0x1B
/* Battery Mode defines */
#define BATTERY_MODE_OFFSET 0x03
#define BATTERY_MODE_CAPACITY_MASK BIT(15)
enum sbs_capacity_mode {
CAPACITY_MODE_AMPS = 0,
CAPACITY_MODE_WATTS = BATTERY_MODE_CAPACITY_MASK
};
#define BATTERY_MODE_CHARGER_MASK (1<<14)
/* manufacturer access defines */
#define MANUFACTURER_ACCESS_STATUS 0x0006
#define MANUFACTURER_ACCESS_SLEEP 0x0011
/* battery status value bits */
#define BATTERY_INITIALIZED 0x80
#define BATTERY_DISCHARGING 0x40
#define BATTERY_FULL_CHARGED 0x20
#define BATTERY_FULL_DISCHARGED 0x10
/* min_value and max_value are only valid for numerical data */
#define SBS_DATA(_psp, _addr, _min_value, _max_value) { \
.psp = _psp, \
.addr = _addr, \
.min_value = _min_value, \
.max_value = _max_value, \
}
static const struct chip_data {
enum power_supply_property psp;
u8 addr;
int min_value;
int max_value;
} sbs_data[] = {
[REG_MANUFACTURER_DATA] =
SBS_DATA(POWER_SUPPLY_PROP_PRESENT, 0x00, 0, 65535),
[REG_BATTERY_MODE] =
SBS_DATA(-1, 0x03, 0, 65535),
[REG_TEMPERATURE] =
SBS_DATA(POWER_SUPPLY_PROP_TEMP, 0x08, 0, 65535),
[REG_VOLTAGE] =
SBS_DATA(POWER_SUPPLY_PROP_VOLTAGE_NOW, 0x09, 0, 65535),
[REG_CURRENT_NOW] =
SBS_DATA(POWER_SUPPLY_PROP_CURRENT_NOW, 0x0A, -32768, 32767),
[REG_CURRENT_AVG] =
SBS_DATA(POWER_SUPPLY_PROP_CURRENT_AVG, 0x0B, -32768, 32767),
[REG_MAX_ERR] =
SBS_DATA(POWER_SUPPLY_PROP_CAPACITY_ERROR_MARGIN, 0x0c, 0, 100),
[REG_CAPACITY] =
SBS_DATA(POWER_SUPPLY_PROP_CAPACITY, 0x0D, 0, 100),
[REG_REMAINING_CAPACITY] =
SBS_DATA(POWER_SUPPLY_PROP_ENERGY_NOW, 0x0F, 0, 65535),
[REG_REMAINING_CAPACITY_CHARGE] =
SBS_DATA(POWER_SUPPLY_PROP_CHARGE_NOW, 0x0F, 0, 65535),
[REG_FULL_CHARGE_CAPACITY] =
SBS_DATA(POWER_SUPPLY_PROP_ENERGY_FULL, 0x10, 0, 65535),
[REG_FULL_CHARGE_CAPACITY_CHARGE] =
SBS_DATA(POWER_SUPPLY_PROP_CHARGE_FULL, 0x10, 0, 65535),
[REG_TIME_TO_EMPTY_NOW] =
SBS_DATA(POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, 0x11, 0, 65535),
[REG_TIME_TO_EMPTY_AVG] =
SBS_DATA(POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, 0x12, 0, 65535),
[REG_TIME_TO_FULL_AVG] =
SBS_DATA(POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, 0x13, 0, 65535),
[REG_CHARGE_CURRENT] =
SBS_DATA(POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, 0x14, 0, 65535),
[REG_CHARGE_VOLTAGE] =
SBS_DATA(POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, 0x15, 0, 65535),
[REG_STATUS] =
SBS_DATA(POWER_SUPPLY_PROP_STATUS, 0x16, 0, 65535),
[REG_CAPACITY_LEVEL] =
SBS_DATA(POWER_SUPPLY_PROP_CAPACITY_LEVEL, 0x16, 0, 65535),
[REG_CYCLE_COUNT] =
SBS_DATA(POWER_SUPPLY_PROP_CYCLE_COUNT, 0x17, 0, 65535),
[REG_DESIGN_CAPACITY] =
SBS_DATA(POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 0x18, 0, 65535),
[REG_DESIGN_CAPACITY_CHARGE] =
SBS_DATA(POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 0x18, 0, 65535),
[REG_DESIGN_VOLTAGE_MIN] =
SBS_DATA(POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 0x19, 0, 65535),
[REG_DESIGN_VOLTAGE_MAX] =
SBS_DATA(POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, 0x19, 0, 65535),
[REG_SERIAL_NUMBER] =
SBS_DATA(POWER_SUPPLY_PROP_SERIAL_NUMBER, 0x1C, 0, 65535),
/* Properties of type `const char *' */
[REG_MANUFACTURER] =
SBS_DATA(POWER_SUPPLY_PROP_MANUFACTURER, 0x20, 0, 65535),
[REG_MODEL_NAME] =
SBS_DATA(POWER_SUPPLY_PROP_MODEL_NAME, 0x21, 0, 65535),
[REG_CHEMISTRY] =
SBS_DATA(POWER_SUPPLY_PROP_TECHNOLOGY, 0x22, 0, 65535)
};
static const enum power_supply_property sbs_properties[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_ERROR_MARGIN,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_ENERGY_FULL,
POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_MANUFACTURE_YEAR,
POWER_SUPPLY_PROP_MANUFACTURE_MONTH,
POWER_SUPPLY_PROP_MANUFACTURE_DAY,
/* Properties of type `const char *' */
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_MODEL_NAME
};
/* Supports special manufacturer commands from TI BQ20Z65 and BQ20Z75 IC. */
#define SBS_FLAGS_TI_BQ20ZX5 BIT(0)
static const enum power_supply_property string_properties[] = {
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_MODEL_NAME,
};
#define NR_STRING_BUFFERS ARRAY_SIZE(string_properties)
struct sbs_info {
struct i2c_client *client;
struct power_supply *power_supply;
bool is_present;
struct gpio_desc *gpio_detect;
bool charger_broadcasts;
int last_state;
int poll_time;
u32 i2c_retry_count;
u32 poll_retry_count;
struct delayed_work work;
struct mutex mode_lock;
u32 flags;
int technology;
char strings[NR_STRING_BUFFERS][I2C_SMBUS_BLOCK_MAX + 1];
};
static char *sbs_get_string_buf(struct sbs_info *chip,
enum power_supply_property psp)
{
int i = 0;
for (i = 0; i < NR_STRING_BUFFERS; i++)
if (string_properties[i] == psp)
return chip->strings[i];
return ERR_PTR(-EINVAL);
}
static void sbs_invalidate_cached_props(struct sbs_info *chip)
{
int i = 0;
chip->technology = -1;
for (i = 0; i < NR_STRING_BUFFERS; i++)
chip->strings[i][0] = 0;
}
static bool force_load;
static int sbs_read_word_data(struct i2c_client *client, u8 address);
static int sbs_write_word_data(struct i2c_client *client, u8 address, u16 value);
static void sbs_disable_charger_broadcasts(struct sbs_info *chip)
{
int val = sbs_read_word_data(chip->client, BATTERY_MODE_OFFSET);
if (val < 0)
goto exit;
val |= BATTERY_MODE_CHARGER_MASK;
val = sbs_write_word_data(chip->client, BATTERY_MODE_OFFSET, val);
exit:
if (val < 0)
dev_err(&chip->client->dev,
"Failed to disable charger broadcasting: %d\n", val);
else
dev_dbg(&chip->client->dev, "%s\n", __func__);
}
static int sbs_update_presence(struct sbs_info *chip, bool is_present)
{
struct i2c_client *client = chip->client;
int retries = chip->i2c_retry_count;
s32 ret = 0;
u8 version;
if (chip->is_present == is_present)
return 0;
if (!is_present) {
chip->is_present = false;
/* Disable PEC when no device is present */
client->flags &= ~I2C_CLIENT_PEC;
sbs_invalidate_cached_props(chip);
return 0;
}
/* Check if device supports packet error checking and use it */
while (retries > 0) {
ret = i2c_smbus_read_word_data(client, REG_ADDR_SPEC_INFO);
if (ret >= 0)
break;
/*
* Some batteries trigger the detection pin before the
* I2C bus is properly connected. This works around the
* issue.
*/
msleep(100);
retries--;
}
if (ret < 0) {
dev_dbg(&client->dev, "failed to read spec info: %d\n", ret);
/* fallback to old behaviour */
client->flags &= ~I2C_CLIENT_PEC;
chip->is_present = true;
return ret;
}
version = (ret & SPEC_INFO_VERSION_MASK) >> SPEC_INFO_VERSION_SHIFT;
if (version == SBS_VERSION_1_1_WITH_PEC)
client->flags |= I2C_CLIENT_PEC;
else
client->flags &= ~I2C_CLIENT_PEC;
if (of_device_is_compatible(client->dev.parent->of_node, "google,cros-ec-i2c-tunnel")
&& client->flags & I2C_CLIENT_PEC) {
dev_info(&client->dev, "Disabling PEC because of broken Cros-EC implementation\n");
client->flags &= ~I2C_CLIENT_PEC;
}
dev_dbg(&client->dev, "PEC: %s\n", (client->flags & I2C_CLIENT_PEC) ?
"enabled" : "disabled");
if (!chip->is_present && is_present && !chip->charger_broadcasts)
sbs_disable_charger_broadcasts(chip);
chip->is_present = true;
return 0;
}
static int sbs_read_word_data(struct i2c_client *client, u8 address)
{
struct sbs_info *chip = i2c_get_clientdata(client);
int retries = chip->i2c_retry_count;
s32 ret = 0;
while (retries > 0) {
ret = i2c_smbus_read_word_data(client, address);
if (ret >= 0)
break;
retries--;
}
if (ret < 0) {
dev_dbg(&client->dev,
"%s: i2c read at address 0x%x failed\n",
__func__, address);
return ret;
}
return ret;
}
static int sbs_read_string_data_fallback(struct i2c_client *client, u8 address, char *values)
{
struct sbs_info *chip = i2c_get_clientdata(client);
s32 ret = 0, block_length = 0;
int retries_length, retries_block;
u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
retries_length = chip->i2c_retry_count;
retries_block = chip->i2c_retry_count;
dev_warn_once(&client->dev, "I2C adapter does not support I2C_FUNC_SMBUS_READ_BLOCK_DATA.\n"
"Fallback method does not support PEC.\n");
/* Adapter needs to support these two functions */
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_I2C_BLOCK)){
return -ENODEV;
}
/* Get the length of block data */
while (retries_length > 0) {
ret = i2c_smbus_read_byte_data(client, address);
if (ret >= 0)
break;
retries_length--;
}
if (ret < 0) {
dev_dbg(&client->dev,
"%s: i2c read at address 0x%x failed\n",
__func__, address);
return ret;
}
/* block_length does not include NULL terminator */
block_length = ret;
if (block_length > I2C_SMBUS_BLOCK_MAX) {
dev_err(&client->dev,
"%s: Returned block_length is longer than 0x%x\n",
__func__, I2C_SMBUS_BLOCK_MAX);
return -EINVAL;
}
/* Get the block data */
while (retries_block > 0) {
ret = i2c_smbus_read_i2c_block_data(
client, address,
block_length + 1, block_buffer);
if (ret >= 0)
break;
retries_block--;
}
if (ret < 0) {
dev_dbg(&client->dev,
"%s: i2c read at address 0x%x failed\n",
__func__, address);
return ret;
}
/* block_buffer[0] == block_length */
memcpy(values, block_buffer + 1, block_length);
values[block_length] = '\0';
return ret;
}
static int sbs_read_string_data(struct i2c_client *client, u8 address, char *values)
{
struct sbs_info *chip = i2c_get_clientdata(client);
int retries = chip->i2c_retry_count;
int ret = 0;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_BLOCK_DATA)) {
bool pec = client->flags & I2C_CLIENT_PEC;
client->flags &= ~I2C_CLIENT_PEC;
ret = sbs_read_string_data_fallback(client, address, values);
if (pec)
client->flags |= I2C_CLIENT_PEC;
return ret;
}
while (retries > 0) {
ret = i2c_smbus_read_block_data(client, address, values);
if (ret >= 0)
break;
retries--;
}
if (ret < 0) {
dev_dbg(&client->dev, "failed to read block 0x%x: %d\n", address, ret);
return ret;
}
/* add string termination */
values[ret] = '\0';
return ret;
}
static int sbs_write_word_data(struct i2c_client *client, u8 address,
u16 value)
{
struct sbs_info *chip = i2c_get_clientdata(client);
int retries = chip->i2c_retry_count;
s32 ret = 0;
while (retries > 0) {
ret = i2c_smbus_write_word_data(client, address, value);
if (ret >= 0)
break;
retries--;
}
if (ret < 0) {
dev_dbg(&client->dev,
"%s: i2c write to address 0x%x failed\n",
__func__, address);
return ret;
}
return 0;
}
static int sbs_status_correct(struct i2c_client *client, int *intval)
{
int ret;
ret = sbs_read_word_data(client, sbs_data[REG_CURRENT_NOW].addr);
if (ret < 0)
return ret;
ret = (s16)ret;
/* Not drawing current -> not charging (i.e. idle) */
if (*intval != POWER_SUPPLY_STATUS_FULL && ret == 0)
*intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
if (*intval == POWER_SUPPLY_STATUS_FULL) {
/* Drawing or providing current when full */
if (ret > 0)
*intval = POWER_SUPPLY_STATUS_CHARGING;
else if (ret < 0)
*intval = POWER_SUPPLY_STATUS_DISCHARGING;
}
return 0;
}
static bool sbs_bat_needs_calibration(struct i2c_client *client)
{
int ret;
ret = sbs_read_word_data(client, sbs_data[REG_BATTERY_MODE].addr);
if (ret < 0)
return false;
return !!(ret & BIT(7));
}
static int sbs_get_ti_battery_presence_and_health(
struct i2c_client *client, enum power_supply_property psp,
union power_supply_propval *val)
{
s32 ret;
/*
* Write to ManufacturerAccess with ManufacturerAccess command
* and then read the status.
*/
ret = sbs_write_word_data(client, sbs_data[REG_MANUFACTURER_DATA].addr,
MANUFACTURER_ACCESS_STATUS);
if (ret < 0) {
if (psp == POWER_SUPPLY_PROP_PRESENT)
val->intval = 0; /* battery removed */
return ret;
}
ret = sbs_read_word_data(client, sbs_data[REG_MANUFACTURER_DATA].addr);
if (ret < 0) {
if (psp == POWER_SUPPLY_PROP_PRESENT)
val->intval = 0; /* battery removed */
return ret;
}
if (ret < sbs_data[REG_MANUFACTURER_DATA].min_value ||
ret > sbs_data[REG_MANUFACTURER_DATA].max_value) {
val->intval = 0;
return 0;
}
/* Mask the upper nibble of 2nd byte and
* lower byte of response then
* shift the result by 8 to get status*/
ret &= 0x0F00;
ret >>= 8;
if (psp == POWER_SUPPLY_PROP_PRESENT) {
if (ret == 0x0F)
/* battery removed */
val->intval = 0;
else
val->intval = 1;
} else if (psp == POWER_SUPPLY_PROP_HEALTH) {
if (ret == 0x09)
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
else if (ret == 0x0B)
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
else if (ret == 0x0C)
val->intval = POWER_SUPPLY_HEALTH_DEAD;
else if (sbs_bat_needs_calibration(client))
val->intval = POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED;
else
val->intval = POWER_SUPPLY_HEALTH_GOOD;
}
return 0;
}
static int sbs_get_battery_presence_and_health(
struct i2c_client *client, enum power_supply_property psp,
union power_supply_propval *val)
{
struct sbs_info *chip = i2c_get_clientdata(client);
int ret;
if (chip->flags & SBS_FLAGS_TI_BQ20ZX5)
return sbs_get_ti_battery_presence_and_health(client, psp, val);
/* Dummy command; if it succeeds, battery is present. */
ret = sbs_read_word_data(client, sbs_data[REG_STATUS].addr);
if (ret < 0) { /* battery not present*/
if (psp == POWER_SUPPLY_PROP_PRESENT) {
val->intval = 0;
return 0;
}
return ret;
}
if (psp == POWER_SUPPLY_PROP_PRESENT)
val->intval = 1; /* battery present */
else { /* POWER_SUPPLY_PROP_HEALTH */
if (sbs_bat_needs_calibration(client)) {
val->intval = POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED;
} else {
/* SBS spec doesn't have a general health command. */
val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
}
}
return 0;
}
static int sbs_get_battery_property(struct i2c_client *client,
int reg_offset, enum power_supply_property psp,
union power_supply_propval *val)
{
struct sbs_info *chip = i2c_get_clientdata(client);
s32 ret;
ret = sbs_read_word_data(client, sbs_data[reg_offset].addr);
if (ret < 0)
return ret;
/* returned values are 16 bit */
if (sbs_data[reg_offset].min_value < 0)
ret = (s16)ret;
if (ret >= sbs_data[reg_offset].min_value &&
ret <= sbs_data[reg_offset].max_value) {
val->intval = ret;
if (psp == POWER_SUPPLY_PROP_CAPACITY_LEVEL) {
if (!(ret & BATTERY_INITIALIZED))
val->intval =
POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
else if (ret & BATTERY_FULL_CHARGED)
val->intval =
POWER_SUPPLY_CAPACITY_LEVEL_FULL;
else if (ret & BATTERY_FULL_DISCHARGED)
val->intval =
POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
else
val->intval =
POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
return 0;
} else if (psp != POWER_SUPPLY_PROP_STATUS) {
return 0;
}
if (ret & BATTERY_FULL_CHARGED)
val->intval = POWER_SUPPLY_STATUS_FULL;
else if (ret & BATTERY_DISCHARGING)
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
else
val->intval = POWER_SUPPLY_STATUS_CHARGING;
sbs_status_correct(client, &val->intval);
if (chip->poll_time == 0)
chip->last_state = val->intval;
else if (chip->last_state != val->intval) {
cancel_delayed_work_sync(&chip->work);
power_supply_changed(chip->power_supply);
chip->poll_time = 0;
}
} else {
if (psp == POWER_SUPPLY_PROP_STATUS)
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
else if (psp == POWER_SUPPLY_PROP_CAPACITY)
/* sbs spec says that this can be >100 %
* even if max value is 100 %
*/
val->intval = min(ret, 100);
else
val->intval = 0;
}
return 0;
}
static int sbs_get_property_index(struct i2c_client *client,
enum power_supply_property psp)
{
int count;
for (count = 0; count < ARRAY_SIZE(sbs_data); count++)
if (psp == sbs_data[count].psp)
return count;
dev_warn(&client->dev,
"%s: Invalid Property - %d\n", __func__, psp);
return -EINVAL;
}
static const char *sbs_get_constant_string(struct sbs_info *chip,
enum power_supply_property psp)
{
int ret;
char *buf;
u8 addr;
buf = sbs_get_string_buf(chip, psp);
if (IS_ERR(buf))
return buf;
if (!buf[0]) {
ret = sbs_get_property_index(chip->client, psp);
if (ret < 0)
return ERR_PTR(ret);
addr = sbs_data[ret].addr;
ret = sbs_read_string_data(chip->client, addr, buf);
if (ret < 0)
return ERR_PTR(ret);
}
return buf;
}
static void sbs_unit_adjustment(struct i2c_client *client,
enum power_supply_property psp, union power_supply_propval *val)
{
#define BASE_UNIT_CONVERSION 1000
#define BATTERY_MODE_CAP_MULT_WATT (10 * BASE_UNIT_CONVERSION)
#define TIME_UNIT_CONVERSION 60
#define TEMP_KELVIN_TO_CELSIUS 2731
switch (psp) {
case POWER_SUPPLY_PROP_ENERGY_NOW:
case POWER_SUPPLY_PROP_ENERGY_FULL:
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
/* sbs provides energy in units of 10mWh.
* Convert to µWh
*/
val->intval *= BATTERY_MODE_CAP_MULT_WATT;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
case POWER_SUPPLY_PROP_CURRENT_NOW:
case POWER_SUPPLY_PROP_CURRENT_AVG:
case POWER_SUPPLY_PROP_CHARGE_NOW:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
case POWER_SUPPLY_PROP_CHARGE_FULL:
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
val->intval *= BASE_UNIT_CONVERSION;
break;
case POWER_SUPPLY_PROP_TEMP:
/* sbs provides battery temperature in 0.1K
* so convert it to 0.1°C
*/
val->intval -= TEMP_KELVIN_TO_CELSIUS;
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG:
/* sbs provides time to empty and time to full in minutes.
* Convert to seconds
*/
val->intval *= TIME_UNIT_CONVERSION;
break;
default:
dev_dbg(&client->dev,
"%s: no need for unit conversion %d\n", __func__, psp);
}
}
static enum sbs_capacity_mode sbs_set_capacity_mode(struct i2c_client *client,
enum sbs_capacity_mode mode)
{
int ret, original_val;
original_val = sbs_read_word_data(client, BATTERY_MODE_OFFSET);
if (original_val < 0)
return original_val;
if ((original_val & BATTERY_MODE_CAPACITY_MASK) == mode)
return mode;
if (mode == CAPACITY_MODE_AMPS)
ret = original_val & ~BATTERY_MODE_CAPACITY_MASK;
else
ret = original_val | BATTERY_MODE_CAPACITY_MASK;
ret = sbs_write_word_data(client, BATTERY_MODE_OFFSET, ret);
if (ret < 0)
return ret;
usleep_range(1000, 2000);
return original_val & BATTERY_MODE_CAPACITY_MASK;
}
static int sbs_get_battery_capacity(struct i2c_client *client,
int reg_offset, enum power_supply_property psp,
union power_supply_propval *val)
{
s32 ret;
enum sbs_capacity_mode mode = CAPACITY_MODE_WATTS;
if (power_supply_is_amp_property(psp))
mode = CAPACITY_MODE_AMPS;
mode = sbs_set_capacity_mode(client, mode);
if ((int)mode < 0)
return mode;
ret = sbs_read_word_data(client, sbs_data[reg_offset].addr);
if (ret < 0)
return ret;
val->intval = ret;
ret = sbs_set_capacity_mode(client, mode);
if (ret < 0)
return ret;
return 0;
}
static char sbs_serial[5];
static int sbs_get_battery_serial_number(struct i2c_client *client,
union power_supply_propval *val)
{
int ret;
ret = sbs_read_word_data(client, sbs_data[REG_SERIAL_NUMBER].addr);
if (ret < 0)
return ret;
sprintf(sbs_serial, "%04x", ret);
val->strval = sbs_serial;
return 0;
}
static int sbs_get_chemistry(struct sbs_info *chip,
union power_supply_propval *val)
{
const char *chemistry;
if (chip->technology != -1) {
val->intval = chip->technology;
return 0;
}
chemistry = sbs_get_constant_string(chip, POWER_SUPPLY_PROP_TECHNOLOGY);
if (IS_ERR(chemistry))
return PTR_ERR(chemistry);
if (!strncasecmp(chemistry, "LION", 4))
chip->technology = POWER_SUPPLY_TECHNOLOGY_LION;
else if (!strncasecmp(chemistry, "LiP", 3))
chip->technology = POWER_SUPPLY_TECHNOLOGY_LIPO;
else if (!strncasecmp(chemistry, "NiCd", 4))
chip->technology = POWER_SUPPLY_TECHNOLOGY_NiCd;
else if (!strncasecmp(chemistry, "NiMH", 4))
chip->technology = POWER_SUPPLY_TECHNOLOGY_NiMH;
else
chip->technology = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
if (chip->technology == POWER_SUPPLY_TECHNOLOGY_UNKNOWN)
dev_warn(&chip->client->dev, "Unknown chemistry: %s\n", chemistry);
val->intval = chip->technology;
return 0;
}
static int sbs_get_battery_manufacture_date(struct i2c_client *client,
enum power_supply_property psp,
union power_supply_propval *val)
{
int ret;
u16 day, month, year;
ret = sbs_read_word_data(client, REG_ADDR_MANUFACTURE_DATE);
if (ret < 0)
return ret;
day = ret & GENMASK(4, 0);
month = (ret & GENMASK(8, 5)) >> 5;
year = ((ret & GENMASK(15, 9)) >> 9) + 1980;
switch (psp) {
case POWER_SUPPLY_PROP_MANUFACTURE_YEAR:
val->intval = year;
break;
case POWER_SUPPLY_PROP_MANUFACTURE_MONTH:
val->intval = month;
break;
case POWER_SUPPLY_PROP_MANUFACTURE_DAY:
val->intval = day;
break;
default:
return -EINVAL;
}
return 0;
}
static int sbs_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
int ret = 0;
struct sbs_info *chip = power_supply_get_drvdata(psy);
struct i2c_client *client = chip->client;
const char *str;
if (chip->gpio_detect) {
ret = gpiod_get_value_cansleep(chip->gpio_detect);
if (ret < 0)
return ret;
if (psp == POWER_SUPPLY_PROP_PRESENT) {
val->intval = ret;
sbs_update_presence(chip, ret);
return 0;
}
if (ret == 0)
return -ENODATA;
}
switch (psp) {
case POWER_SUPPLY_PROP_PRESENT:
case POWER_SUPPLY_PROP_HEALTH:
ret = sbs_get_battery_presence_and_health(client, psp, val);
/* this can only be true if no gpio is used */
if (psp == POWER_SUPPLY_PROP_PRESENT)
return 0;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
ret = sbs_get_chemistry(chip, val);
if (ret < 0)
break;
goto done; /* don't trigger power_supply_changed()! */
case POWER_SUPPLY_PROP_ENERGY_NOW:
case POWER_SUPPLY_PROP_ENERGY_FULL:
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
case POWER_SUPPLY_PROP_CHARGE_NOW:
case POWER_SUPPLY_PROP_CHARGE_FULL:
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
ret = sbs_get_property_index(client, psp);
if (ret < 0)
break;
/* sbs_get_battery_capacity() will change the battery mode
* temporarily to read the requested attribute. Ensure we stay
* in the desired mode for the duration of the attribute read.
*/
mutex_lock(&chip->mode_lock);
ret = sbs_get_battery_capacity(client, ret, psp, val);
mutex_unlock(&chip->mode_lock);
break;
case POWER_SUPPLY_PROP_SERIAL_NUMBER:
ret = sbs_get_battery_serial_number(client, val);
break;
case POWER_SUPPLY_PROP_STATUS:
case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
case POWER_SUPPLY_PROP_CYCLE_COUNT:
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
case POWER_SUPPLY_PROP_CURRENT_NOW:
case POWER_SUPPLY_PROP_CURRENT_AVG:
case POWER_SUPPLY_PROP_TEMP:
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG:
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
case POWER_SUPPLY_PROP_CAPACITY:
case POWER_SUPPLY_PROP_CAPACITY_ERROR_MARGIN:
ret = sbs_get_property_index(client, psp);
if (ret < 0)
break;
ret = sbs_get_battery_property(client, ret, psp, val);
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
case POWER_SUPPLY_PROP_MANUFACTURER:
str = sbs_get_constant_string(chip, psp);
if (IS_ERR(str))
ret = PTR_ERR(str);
else
val->strval = str;
break;
case POWER_SUPPLY_PROP_MANUFACTURE_YEAR:
case POWER_SUPPLY_PROP_MANUFACTURE_MONTH:
case POWER_SUPPLY_PROP_MANUFACTURE_DAY:
ret = sbs_get_battery_manufacture_date(client, psp, val);
break;
default:
dev_err(&client->dev,
"%s: INVALID property\n", __func__);
return -EINVAL;
}
if (!chip->gpio_detect && chip->is_present != (ret >= 0)) {
bool old_present = chip->is_present;
union power_supply_propval val;
int err = sbs_get_battery_presence_and_health(
client, POWER_SUPPLY_PROP_PRESENT, &val);
sbs_update_presence(chip, !err && val.intval);
if (old_present != chip->is_present)
power_supply_changed(chip->power_supply);
}
done:
if (!ret) {
/* Convert units to match requirements for power supply class */
sbs_unit_adjustment(client, psp, val);
dev_dbg(&client->dev,
"%s: property = %d, value = %x\n", __func__,
psp, val->intval);
} else if (!chip->is_present) {
/* battery not present, so return NODATA for properties */
ret = -ENODATA;
}
return ret;
}
static void sbs_supply_changed(struct sbs_info *chip)
{
struct power_supply *battery = chip->power_supply;
int ret;
ret = gpiod_get_value_cansleep(chip->gpio_detect);
if (ret < 0)
return;
sbs_update_presence(chip, ret);
power_supply_changed(battery);
}
static irqreturn_t sbs_irq(int irq, void *devid)
{
sbs_supply_changed(devid);
return IRQ_HANDLED;
}
static void sbs_alert(struct i2c_client *client, enum i2c_alert_protocol prot,
unsigned int data)
{
sbs_supply_changed(i2c_get_clientdata(client));
}
static void sbs_external_power_changed(struct power_supply *psy)
{
struct sbs_info *chip = power_supply_get_drvdata(psy);
/* cancel outstanding work */
cancel_delayed_work_sync(&chip->work);
schedule_delayed_work(&chip->work, HZ);
chip->poll_time = chip->poll_retry_count;
}
static void sbs_delayed_work(struct work_struct *work)
{
struct sbs_info *chip;
s32 ret;
chip = container_of(work, struct sbs_info, work.work);
ret = sbs_read_word_data(chip->client, sbs_data[REG_STATUS].addr);
/* if the read failed, give up on this work */
if (ret < 0) {
chip->poll_time = 0;
return;
}
if (ret & BATTERY_FULL_CHARGED)
ret = POWER_SUPPLY_STATUS_FULL;
else if (ret & BATTERY_DISCHARGING)
ret = POWER_SUPPLY_STATUS_DISCHARGING;
else
ret = POWER_SUPPLY_STATUS_CHARGING;
sbs_status_correct(chip->client, &ret);
if (chip->last_state != ret) {
chip->poll_time = 0;
power_supply_changed(chip->power_supply);
return;
}
if (chip->poll_time > 0) {
schedule_delayed_work(&chip->work, HZ);
chip->poll_time--;
return;
}
}
static const struct power_supply_desc sbs_default_desc = {
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = sbs_properties,
.num_properties = ARRAY_SIZE(sbs_properties),
.get_property = sbs_get_property,
.external_power_changed = sbs_external_power_changed,
};
static int sbs_probe(struct i2c_client *client)
{
struct sbs_info *chip;
struct power_supply_desc *sbs_desc;
struct sbs_platform_data *pdata = client->dev.platform_data;
struct power_supply_config psy_cfg = {};
int rc;
int irq;
sbs_desc = devm_kmemdup(&client->dev, &sbs_default_desc,
sizeof(*sbs_desc), GFP_KERNEL);
if (!sbs_desc)
return -ENOMEM;
sbs_desc->name = devm_kasprintf(&client->dev, GFP_KERNEL, "sbs-%s",
dev_name(&client->dev));
if (!sbs_desc->name)
return -ENOMEM;
chip = devm_kzalloc(&client->dev, sizeof(struct sbs_info), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->flags = (u32)(uintptr_t)device_get_match_data(&client->dev);
chip->client = client;
psy_cfg.of_node = client->dev.of_node;
psy_cfg.drv_data = chip;
chip->last_state = POWER_SUPPLY_STATUS_UNKNOWN;
sbs_invalidate_cached_props(chip);
mutex_init(&chip->mode_lock);
/* use pdata if available, fall back to DT properties,
* or hardcoded defaults if not
*/
rc = device_property_read_u32(&client->dev, "sbs,i2c-retry-count",
&chip->i2c_retry_count);
if (rc)
chip->i2c_retry_count = 0;
rc = device_property_read_u32(&client->dev, "sbs,poll-retry-count",
&chip->poll_retry_count);
if (rc)
chip->poll_retry_count = 0;
if (pdata) {
chip->poll_retry_count = pdata->poll_retry_count;
chip->i2c_retry_count = pdata->i2c_retry_count;
}
chip->i2c_retry_count = chip->i2c_retry_count + 1;
chip->charger_broadcasts = !device_property_read_bool(&client->dev,
"sbs,disable-charger-broadcasts");
chip->gpio_detect = devm_gpiod_get_optional(&client->dev,
"sbs,battery-detect", GPIOD_IN);
if (IS_ERR(chip->gpio_detect))
return dev_err_probe(&client->dev, PTR_ERR(chip->gpio_detect),
"Failed to get gpio\n");
i2c_set_clientdata(client, chip);
if (!chip->gpio_detect)
goto skip_gpio;
irq = gpiod_to_irq(chip->gpio_detect);
if (irq <= 0) {
dev_warn(&client->dev, "Failed to get gpio as irq: %d\n", irq);
goto skip_gpio;
}
rc = devm_request_threaded_irq(&client->dev, irq, NULL, sbs_irq,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
dev_name(&client->dev), chip);
if (rc) {
dev_warn(&client->dev, "Failed to request irq: %d\n", rc);
goto skip_gpio;
}
skip_gpio:
/*
* Before we register, we might need to make sure we can actually talk
* to the battery.
*/
if (!(force_load || chip->gpio_detect)) {
union power_supply_propval val;
rc = sbs_get_battery_presence_and_health(
client, POWER_SUPPLY_PROP_PRESENT, &val);
if (rc < 0 || !val.intval)
return dev_err_probe(&client->dev, -ENODEV,
"Failed to get present status\n");
}
rc = devm_delayed_work_autocancel(&client->dev, &chip->work,
sbs_delayed_work);
if (rc)
return rc;
chip->power_supply = devm_power_supply_register(&client->dev, sbs_desc,
&psy_cfg);
if (IS_ERR(chip->power_supply))
return dev_err_probe(&client->dev, PTR_ERR(chip->power_supply),
"Failed to register power supply\n");
dev_info(&client->dev,
"%s: battery gas gauge device registered\n", client->name);
return 0;
}
#if defined CONFIG_PM_SLEEP
static int sbs_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct sbs_info *chip = i2c_get_clientdata(client);
int ret;
if (chip->poll_time > 0)
cancel_delayed_work_sync(&chip->work);
if (chip->flags & SBS_FLAGS_TI_BQ20ZX5) {
/* Write to manufacturer access with sleep command. */
ret = sbs_write_word_data(client,
sbs_data[REG_MANUFACTURER_DATA].addr,
MANUFACTURER_ACCESS_SLEEP);
if (chip->is_present && ret < 0)
return ret;
}
return 0;
}
static SIMPLE_DEV_PM_OPS(sbs_pm_ops, sbs_suspend, NULL);
#define SBS_PM_OPS (&sbs_pm_ops)
#else
#define SBS_PM_OPS NULL
#endif
static const struct i2c_device_id sbs_id[] = {
{ "bq20z65", 0 },
{ "bq20z75", 0 },
{ "sbs-battery", 1 },
{}
};
MODULE_DEVICE_TABLE(i2c, sbs_id);
static const struct of_device_id sbs_dt_ids[] = {
{ .compatible = "sbs,sbs-battery" },
{
.compatible = "ti,bq20z65",
.data = (void *)SBS_FLAGS_TI_BQ20ZX5,
},
{
.compatible = "ti,bq20z75",
.data = (void *)SBS_FLAGS_TI_BQ20ZX5,
},
{ }
};
MODULE_DEVICE_TABLE(of, sbs_dt_ids);
static struct i2c_driver sbs_battery_driver = {
.probe = sbs_probe,
.alert = sbs_alert,
.id_table = sbs_id,
.driver = {
.name = "sbs-battery",
.of_match_table = sbs_dt_ids,
.pm = SBS_PM_OPS,
},
};
module_i2c_driver(sbs_battery_driver);
MODULE_DESCRIPTION("SBS battery monitor driver");
MODULE_LICENSE("GPL");
module_param(force_load, bool, 0444);
MODULE_PARM_DESC(force_load,
"Attempt to load the driver even if no battery is connected");
| linux-master | drivers/power/supply/sbs-battery.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Power supply driver for ChromeOS EC based Peripheral Device Charger.
*
* Copyright 2020 Google LLC.
*/
#include <linux/module.h>
#include <linux/notifier.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
#include <linux/stringify.h>
#include <linux/types.h>
#include <asm/unaligned.h>
#define DRV_NAME "cros-ec-pchg"
#define PCHG_DIR_PREFIX "peripheral"
#define PCHG_DIR_NAME PCHG_DIR_PREFIX "%d"
#define PCHG_DIR_NAME_LENGTH \
sizeof(PCHG_DIR_PREFIX __stringify(EC_PCHG_MAX_PORTS))
#define PCHG_CACHE_UPDATE_DELAY msecs_to_jiffies(500)
struct port_data {
int port_number;
char name[PCHG_DIR_NAME_LENGTH];
struct power_supply *psy;
struct power_supply_desc psy_desc;
int psy_status;
int battery_percentage;
int charge_type;
struct charger_data *charger;
unsigned long last_update;
};
struct charger_data {
struct device *dev;
struct cros_ec_dev *ec_dev;
struct cros_ec_device *ec_device;
int num_registered_psy;
struct port_data *ports[EC_PCHG_MAX_PORTS];
struct notifier_block notifier;
};
static enum power_supply_property cros_pchg_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_SCOPE,
};
static int cros_pchg_ec_command(const struct charger_data *charger,
unsigned int version,
unsigned int command,
const void *outdata,
unsigned int outsize,
void *indata,
unsigned int insize)
{
struct cros_ec_dev *ec_dev = charger->ec_dev;
struct cros_ec_command *msg;
int ret;
msg = kzalloc(struct_size(msg, data, max(outsize, insize)), GFP_KERNEL);
if (!msg)
return -ENOMEM;
msg->version = version;
msg->command = ec_dev->cmd_offset + command;
msg->outsize = outsize;
msg->insize = insize;
if (outsize)
memcpy(msg->data, outdata, outsize);
ret = cros_ec_cmd_xfer_status(charger->ec_device, msg);
if (ret >= 0 && insize)
memcpy(indata, msg->data, insize);
kfree(msg);
return ret;
}
static const unsigned int pchg_cmd_version = 1;
static bool cros_pchg_cmd_ver_check(const struct charger_data *charger)
{
struct ec_params_get_cmd_versions_v1 req;
struct ec_response_get_cmd_versions rsp;
int ret;
req.cmd = EC_CMD_PCHG;
ret = cros_pchg_ec_command(charger, 1, EC_CMD_GET_CMD_VERSIONS,
&req, sizeof(req), &rsp, sizeof(rsp));
if (ret < 0) {
dev_warn(charger->dev,
"Unable to get versions of EC_CMD_PCHG (err:%d)\n",
ret);
return false;
}
return !!(rsp.version_mask & BIT(pchg_cmd_version));
}
static int cros_pchg_port_count(const struct charger_data *charger)
{
struct ec_response_pchg_count rsp;
int ret;
ret = cros_pchg_ec_command(charger, 0, EC_CMD_PCHG_COUNT,
NULL, 0, &rsp, sizeof(rsp));
if (ret < 0) {
dev_warn(charger->dev,
"Unable to get number or ports (err:%d)\n", ret);
return ret;
}
return rsp.port_count;
}
static int cros_pchg_get_status(struct port_data *port)
{
struct charger_data *charger = port->charger;
struct ec_params_pchg req;
struct ec_response_pchg rsp;
struct device *dev = charger->dev;
int old_status = port->psy_status;
int old_percentage = port->battery_percentage;
int ret;
req.port = port->port_number;
ret = cros_pchg_ec_command(charger, pchg_cmd_version, EC_CMD_PCHG,
&req, sizeof(req), &rsp, sizeof(rsp));
if (ret < 0) {
dev_err(dev, "Unable to get port.%d status (err:%d)\n",
port->port_number, ret);
return ret;
}
switch (rsp.state) {
case PCHG_STATE_RESET:
case PCHG_STATE_INITIALIZED:
case PCHG_STATE_ENABLED:
default:
port->psy_status = POWER_SUPPLY_STATUS_UNKNOWN;
port->charge_type = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
case PCHG_STATE_DETECTED:
port->psy_status = POWER_SUPPLY_STATUS_CHARGING;
port->charge_type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
case PCHG_STATE_CHARGING:
port->psy_status = POWER_SUPPLY_STATUS_CHARGING;
port->charge_type = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
break;
case PCHG_STATE_FULL:
port->psy_status = POWER_SUPPLY_STATUS_FULL;
port->charge_type = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
}
port->battery_percentage = rsp.battery_percentage;
if (port->psy_status != old_status ||
port->battery_percentage != old_percentage)
power_supply_changed(port->psy);
dev_dbg(dev,
"Port %d: state=%d battery=%d%%\n",
port->port_number, rsp.state, rsp.battery_percentage);
return 0;
}
static int cros_pchg_get_port_status(struct port_data *port, bool ratelimit)
{
int ret;
if (ratelimit &&
time_is_after_jiffies(port->last_update + PCHG_CACHE_UPDATE_DELAY))
return 0;
ret = cros_pchg_get_status(port);
if (ret < 0)
return ret;
port->last_update = jiffies;
return ret;
}
static int cros_pchg_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct port_data *port = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
case POWER_SUPPLY_PROP_CAPACITY:
case POWER_SUPPLY_PROP_CHARGE_TYPE:
cros_pchg_get_port_status(port, true);
break;
default:
break;
}
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
val->intval = port->psy_status;
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = port->battery_percentage;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
val->intval = port->charge_type;
break;
case POWER_SUPPLY_PROP_SCOPE:
val->intval = POWER_SUPPLY_SCOPE_DEVICE;
break;
default:
return -EINVAL;
}
return 0;
}
static int cros_pchg_event(const struct charger_data *charger)
{
int i;
for (i = 0; i < charger->num_registered_psy; i++)
cros_pchg_get_port_status(charger->ports[i], false);
return NOTIFY_OK;
}
static int cros_ec_notify(struct notifier_block *nb,
unsigned long queued_during_suspend,
void *data)
{
struct cros_ec_device *ec_dev = data;
struct charger_data *charger =
container_of(nb, struct charger_data, notifier);
u32 host_event;
if (ec_dev->event_data.event_type != EC_MKBP_EVENT_PCHG ||
ec_dev->event_size != sizeof(host_event))
return NOTIFY_DONE;
host_event = get_unaligned_le32(&ec_dev->event_data.data.host_event);
if (!(host_event & EC_MKBP_PCHG_DEVICE_EVENT))
return NOTIFY_DONE;
return cros_pchg_event(charger);
}
static int cros_pchg_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct cros_ec_dev *ec_dev = dev_get_drvdata(dev->parent);
struct cros_ec_device *ec_device = ec_dev->ec_dev;
struct power_supply_desc *psy_desc;
struct charger_data *charger;
struct power_supply *psy;
struct port_data *port;
struct notifier_block *nb;
int num_ports;
int ret;
int i;
charger = devm_kzalloc(dev, sizeof(*charger), GFP_KERNEL);
if (!charger)
return -ENOMEM;
charger->dev = dev;
charger->ec_dev = ec_dev;
charger->ec_device = ec_device;
platform_set_drvdata(pdev, charger);
ret = cros_pchg_port_count(charger);
if (ret <= 0) {
/*
* This feature is enabled by the EC and the kernel driver is
* included by default for CrOS devices. Don't need to be loud
* since this error can be normal.
*/
dev_info(dev, "No peripheral charge ports (err:%d)\n", ret);
return -ENODEV;
}
if (!cros_pchg_cmd_ver_check(charger)) {
dev_err(dev, "EC_CMD_PCHG version %d isn't available.\n",
pchg_cmd_version);
return -EOPNOTSUPP;
}
num_ports = ret;
if (num_ports > EC_PCHG_MAX_PORTS) {
dev_err(dev, "Too many peripheral charge ports (%d)\n",
num_ports);
return -ENOBUFS;
}
dev_info(dev, "%d peripheral charge ports found\n", num_ports);
for (i = 0; i < num_ports; i++) {
struct power_supply_config psy_cfg = {};
port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
if (!port)
return -ENOMEM;
port->charger = charger;
port->port_number = i;
snprintf(port->name, sizeof(port->name), PCHG_DIR_NAME, i);
psy_desc = &port->psy_desc;
psy_desc->name = port->name;
psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
psy_desc->get_property = cros_pchg_get_prop;
psy_desc->external_power_changed = NULL;
psy_desc->properties = cros_pchg_props;
psy_desc->num_properties = ARRAY_SIZE(cros_pchg_props);
psy_cfg.drv_data = port;
psy = devm_power_supply_register(dev, psy_desc, &psy_cfg);
if (IS_ERR(psy))
return dev_err_probe(dev, PTR_ERR(psy),
"Failed to register power supply\n");
port->psy = psy;
charger->ports[charger->num_registered_psy++] = port;
}
if (!charger->num_registered_psy)
return -ENODEV;
nb = &charger->notifier;
nb->notifier_call = cros_ec_notify;
ret = blocking_notifier_chain_register(&ec_dev->ec_dev->event_notifier,
nb);
if (ret < 0)
dev_err(dev, "Failed to register notifier (err:%d)\n", ret);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int __maybe_unused cros_pchg_resume(struct device *dev)
{
struct charger_data *charger = dev_get_drvdata(dev);
/*
* Sync all ports on resume in case reports from EC are lost during
* the last suspend.
*/
cros_pchg_event(charger);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(cros_pchg_pm_ops, NULL, cros_pchg_resume);
static struct platform_driver cros_pchg_driver = {
.driver = {
.name = DRV_NAME,
.pm = &cros_pchg_pm_ops,
},
.probe = cros_pchg_probe
};
module_platform_driver(cros_pchg_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ChromeOS EC peripheral device charger");
MODULE_ALIAS("platform:" DRV_NAME);
| linux-master | drivers/power/supply/cros_peripheral_charger.c |
/*
* Battery power supply driver for X-Powers AXP20X and AXP22X PMICs
*
* Copyright 2016 Free Electrons NextThing Co.
* Quentin Schulz <[email protected]>
*
* This driver is based on a previous upstreaming attempt by:
* Bruno Prémont <[email protected]>
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file "COPYING" in the main directory of this
* archive for more details.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/iio/iio.h>
#include <linux/iio/consumer.h>
#include <linux/mfd/axp20x.h>
#define AXP20X_PWR_STATUS_BAT_CHARGING BIT(2)
#define AXP20X_PWR_OP_BATT_PRESENT BIT(5)
#define AXP20X_PWR_OP_BATT_ACTIVATED BIT(3)
#define AXP209_FG_PERCENT GENMASK(6, 0)
#define AXP22X_FG_VALID BIT(7)
#define AXP20X_CHRG_CTRL1_ENABLE BIT(7)
#define AXP20X_CHRG_CTRL1_TGT_VOLT GENMASK(6, 5)
#define AXP20X_CHRG_CTRL1_TGT_4_1V (0 << 5)
#define AXP20X_CHRG_CTRL1_TGT_4_15V (1 << 5)
#define AXP20X_CHRG_CTRL1_TGT_4_2V (2 << 5)
#define AXP20X_CHRG_CTRL1_TGT_4_36V (3 << 5)
#define AXP22X_CHRG_CTRL1_TGT_4_22V (1 << 5)
#define AXP22X_CHRG_CTRL1_TGT_4_24V (3 << 5)
#define AXP813_CHRG_CTRL1_TGT_4_35V (3 << 5)
#define AXP20X_CHRG_CTRL1_TGT_CURR GENMASK(3, 0)
#define AXP20X_V_OFF_MASK GENMASK(2, 0)
struct axp20x_batt_ps;
struct axp_data {
int ccc_scale;
int ccc_offset;
bool has_fg_valid;
int (*get_max_voltage)(struct axp20x_batt_ps *batt, int *val);
int (*set_max_voltage)(struct axp20x_batt_ps *batt, int val);
};
struct axp20x_batt_ps {
struct regmap *regmap;
struct power_supply *batt;
struct device *dev;
struct iio_channel *batt_chrg_i;
struct iio_channel *batt_dischrg_i;
struct iio_channel *batt_v;
/* Maximum constant charge current */
unsigned int max_ccc;
const struct axp_data *data;
};
static int axp20x_battery_get_max_voltage(struct axp20x_batt_ps *axp20x_batt,
int *val)
{
int ret, reg;
ret = regmap_read(axp20x_batt->regmap, AXP20X_CHRG_CTRL1, ®);
if (ret)
return ret;
switch (reg & AXP20X_CHRG_CTRL1_TGT_VOLT) {
case AXP20X_CHRG_CTRL1_TGT_4_1V:
*val = 4100000;
break;
case AXP20X_CHRG_CTRL1_TGT_4_15V:
*val = 4150000;
break;
case AXP20X_CHRG_CTRL1_TGT_4_2V:
*val = 4200000;
break;
case AXP20X_CHRG_CTRL1_TGT_4_36V:
*val = 4360000;
break;
default:
return -EINVAL;
}
return 0;
}
static int axp22x_battery_get_max_voltage(struct axp20x_batt_ps *axp20x_batt,
int *val)
{
int ret, reg;
ret = regmap_read(axp20x_batt->regmap, AXP20X_CHRG_CTRL1, ®);
if (ret)
return ret;
switch (reg & AXP20X_CHRG_CTRL1_TGT_VOLT) {
case AXP20X_CHRG_CTRL1_TGT_4_1V:
*val = 4100000;
break;
case AXP20X_CHRG_CTRL1_TGT_4_2V:
*val = 4200000;
break;
case AXP22X_CHRG_CTRL1_TGT_4_22V:
*val = 4220000;
break;
case AXP22X_CHRG_CTRL1_TGT_4_24V:
*val = 4240000;
break;
default:
return -EINVAL;
}
return 0;
}
static int axp813_battery_get_max_voltage(struct axp20x_batt_ps *axp20x_batt,
int *val)
{
int ret, reg;
ret = regmap_read(axp20x_batt->regmap, AXP20X_CHRG_CTRL1, ®);
if (ret)
return ret;
switch (reg & AXP20X_CHRG_CTRL1_TGT_VOLT) {
case AXP20X_CHRG_CTRL1_TGT_4_1V:
*val = 4100000;
break;
case AXP20X_CHRG_CTRL1_TGT_4_15V:
*val = 4150000;
break;
case AXP20X_CHRG_CTRL1_TGT_4_2V:
*val = 4200000;
break;
case AXP813_CHRG_CTRL1_TGT_4_35V:
*val = 4350000;
break;
default:
return -EINVAL;
}
return 0;
}
static int axp20x_get_constant_charge_current(struct axp20x_batt_ps *axp,
int *val)
{
int ret;
ret = regmap_read(axp->regmap, AXP20X_CHRG_CTRL1, val);
if (ret)
return ret;
*val &= AXP20X_CHRG_CTRL1_TGT_CURR;
*val = *val * axp->data->ccc_scale + axp->data->ccc_offset;
return 0;
}
static int axp20x_battery_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct axp20x_batt_ps *axp20x_batt = power_supply_get_drvdata(psy);
int ret = 0, reg, val1;
switch (psp) {
case POWER_SUPPLY_PROP_PRESENT:
case POWER_SUPPLY_PROP_ONLINE:
ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_OP_MODE,
®);
if (ret)
return ret;
val->intval = !!(reg & AXP20X_PWR_OP_BATT_PRESENT);
break;
case POWER_SUPPLY_PROP_STATUS:
ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_INPUT_STATUS,
®);
if (ret)
return ret;
if (reg & AXP20X_PWR_STATUS_BAT_CHARGING) {
val->intval = POWER_SUPPLY_STATUS_CHARGING;
return 0;
}
ret = iio_read_channel_processed(axp20x_batt->batt_dischrg_i,
&val1);
if (ret)
return ret;
if (val1) {
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
return 0;
}
ret = regmap_read(axp20x_batt->regmap, AXP20X_FG_RES, &val1);
if (ret)
return ret;
/*
* Fuel Gauge data takes 7 bits but the stored value seems to be
* directly the raw percentage without any scaling to 7 bits.
*/
if ((val1 & AXP209_FG_PERCENT) == 100)
val->intval = POWER_SUPPLY_STATUS_FULL;
else
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case POWER_SUPPLY_PROP_HEALTH:
ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_OP_MODE,
&val1);
if (ret)
return ret;
if (val1 & AXP20X_PWR_OP_BATT_ACTIVATED) {
val->intval = POWER_SUPPLY_HEALTH_DEAD;
return 0;
}
val->intval = POWER_SUPPLY_HEALTH_GOOD;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = axp20x_get_constant_charge_current(axp20x_batt,
&val->intval);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
val->intval = axp20x_batt->max_ccc;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_INPUT_STATUS,
®);
if (ret)
return ret;
if (reg & AXP20X_PWR_STATUS_BAT_CHARGING) {
ret = iio_read_channel_processed(axp20x_batt->batt_chrg_i, &val->intval);
} else {
ret = iio_read_channel_processed(axp20x_batt->batt_dischrg_i, &val1);
val->intval = -val1;
}
if (ret)
return ret;
/* IIO framework gives mA but Power Supply framework gives uA */
val->intval *= 1000;
break;
case POWER_SUPPLY_PROP_CAPACITY:
/* When no battery is present, return capacity is 100% */
ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_OP_MODE,
®);
if (ret)
return ret;
if (!(reg & AXP20X_PWR_OP_BATT_PRESENT)) {
val->intval = 100;
return 0;
}
ret = regmap_read(axp20x_batt->regmap, AXP20X_FG_RES, ®);
if (ret)
return ret;
if (axp20x_batt->data->has_fg_valid && !(reg & AXP22X_FG_VALID))
return -EINVAL;
/*
* Fuel Gauge data takes 7 bits but the stored value seems to be
* directly the raw percentage without any scaling to 7 bits.
*/
val->intval = reg & AXP209_FG_PERCENT;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
return axp20x_batt->data->get_max_voltage(axp20x_batt,
&val->intval);
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
ret = regmap_read(axp20x_batt->regmap, AXP20X_V_OFF, ®);
if (ret)
return ret;
val->intval = 2600000 + 100000 * (reg & AXP20X_V_OFF_MASK);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = iio_read_channel_processed(axp20x_batt->batt_v,
&val->intval);
if (ret)
return ret;
/* IIO framework gives mV but Power Supply framework gives uV */
val->intval *= 1000;
break;
default:
return -EINVAL;
}
return 0;
}
static int axp22x_battery_set_max_voltage(struct axp20x_batt_ps *axp20x_batt,
int val)
{
switch (val) {
case 4100000:
val = AXP20X_CHRG_CTRL1_TGT_4_1V;
break;
case 4200000:
val = AXP20X_CHRG_CTRL1_TGT_4_2V;
break;
default:
/*
* AXP20x max voltage can be set to 4.36V and AXP22X max voltage
* can be set to 4.22V and 4.24V, but these voltages are too
* high for Lithium based batteries (AXP PMICs are supposed to
* be used with these kinds of battery).
*/
return -EINVAL;
}
return regmap_update_bits(axp20x_batt->regmap, AXP20X_CHRG_CTRL1,
AXP20X_CHRG_CTRL1_TGT_VOLT, val);
}
static int axp20x_battery_set_max_voltage(struct axp20x_batt_ps *axp20x_batt,
int val)
{
switch (val) {
case 4100000:
val = AXP20X_CHRG_CTRL1_TGT_4_1V;
break;
case 4150000:
val = AXP20X_CHRG_CTRL1_TGT_4_15V;
break;
case 4200000:
val = AXP20X_CHRG_CTRL1_TGT_4_2V;
break;
default:
/*
* AXP20x max voltage can be set to 4.36V and AXP22X max voltage
* can be set to 4.22V and 4.24V, but these voltages are too
* high for Lithium based batteries (AXP PMICs are supposed to
* be used with these kinds of battery).
*/
return -EINVAL;
}
return regmap_update_bits(axp20x_batt->regmap, AXP20X_CHRG_CTRL1,
AXP20X_CHRG_CTRL1_TGT_VOLT, val);
}
static int axp20x_set_constant_charge_current(struct axp20x_batt_ps *axp_batt,
int charge_current)
{
if (charge_current > axp_batt->max_ccc)
return -EINVAL;
charge_current = (charge_current - axp_batt->data->ccc_offset) /
axp_batt->data->ccc_scale;
if (charge_current > AXP20X_CHRG_CTRL1_TGT_CURR || charge_current < 0)
return -EINVAL;
return regmap_update_bits(axp_batt->regmap, AXP20X_CHRG_CTRL1,
AXP20X_CHRG_CTRL1_TGT_CURR, charge_current);
}
static int axp20x_set_max_constant_charge_current(struct axp20x_batt_ps *axp,
int charge_current)
{
bool lower_max = false;
charge_current = (charge_current - axp->data->ccc_offset) /
axp->data->ccc_scale;
if (charge_current > AXP20X_CHRG_CTRL1_TGT_CURR || charge_current < 0)
return -EINVAL;
charge_current = charge_current * axp->data->ccc_scale +
axp->data->ccc_offset;
if (charge_current > axp->max_ccc)
dev_warn(axp->dev,
"Setting max constant charge current higher than previously defined. Note that increasing the constant charge current may damage your battery.\n");
else
lower_max = true;
axp->max_ccc = charge_current;
if (lower_max) {
int current_cc;
axp20x_get_constant_charge_current(axp, ¤t_cc);
if (current_cc > charge_current)
axp20x_set_constant_charge_current(axp, charge_current);
}
return 0;
}
static int axp20x_set_voltage_min_design(struct axp20x_batt_ps *axp_batt,
int min_voltage)
{
int val1 = (min_voltage - 2600000) / 100000;
if (val1 < 0 || val1 > AXP20X_V_OFF_MASK)
return -EINVAL;
return regmap_update_bits(axp_batt->regmap, AXP20X_V_OFF,
AXP20X_V_OFF_MASK, val1);
}
static int axp20x_battery_set_prop(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct axp20x_batt_ps *axp20x_batt = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
return axp20x_set_voltage_min_design(axp20x_batt, val->intval);
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
return axp20x_batt->data->set_max_voltage(axp20x_batt, val->intval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
return axp20x_set_constant_charge_current(axp20x_batt,
val->intval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
return axp20x_set_max_constant_charge_current(axp20x_batt,
val->intval);
case POWER_SUPPLY_PROP_STATUS:
switch (val->intval) {
case POWER_SUPPLY_STATUS_CHARGING:
return regmap_update_bits(axp20x_batt->regmap, AXP20X_CHRG_CTRL1,
AXP20X_CHRG_CTRL1_ENABLE, AXP20X_CHRG_CTRL1_ENABLE);
case POWER_SUPPLY_STATUS_DISCHARGING:
case POWER_SUPPLY_STATUS_NOT_CHARGING:
return regmap_update_bits(axp20x_batt->regmap, AXP20X_CHRG_CTRL1,
AXP20X_CHRG_CTRL1_ENABLE, 0);
}
fallthrough;
default:
return -EINVAL;
}
}
static enum power_supply_property axp20x_battery_props[] = {
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_CAPACITY,
};
static int axp20x_battery_prop_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
return psp == POWER_SUPPLY_PROP_STATUS ||
psp == POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN ||
psp == POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN ||
psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT ||
psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX;
}
static const struct power_supply_desc axp20x_batt_ps_desc = {
.name = "axp20x-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = axp20x_battery_props,
.num_properties = ARRAY_SIZE(axp20x_battery_props),
.property_is_writeable = axp20x_battery_prop_writeable,
.get_property = axp20x_battery_get_prop,
.set_property = axp20x_battery_set_prop,
};
static const struct axp_data axp209_data = {
.ccc_scale = 100000,
.ccc_offset = 300000,
.get_max_voltage = axp20x_battery_get_max_voltage,
.set_max_voltage = axp20x_battery_set_max_voltage,
};
static const struct axp_data axp221_data = {
.ccc_scale = 150000,
.ccc_offset = 300000,
.has_fg_valid = true,
.get_max_voltage = axp22x_battery_get_max_voltage,
.set_max_voltage = axp22x_battery_set_max_voltage,
};
static const struct axp_data axp813_data = {
.ccc_scale = 200000,
.ccc_offset = 200000,
.has_fg_valid = true,
.get_max_voltage = axp813_battery_get_max_voltage,
.set_max_voltage = axp20x_battery_set_max_voltage,
};
static const struct of_device_id axp20x_battery_ps_id[] = {
{
.compatible = "x-powers,axp209-battery-power-supply",
.data = (void *)&axp209_data,
}, {
.compatible = "x-powers,axp221-battery-power-supply",
.data = (void *)&axp221_data,
}, {
.compatible = "x-powers,axp813-battery-power-supply",
.data = (void *)&axp813_data,
}, { /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, axp20x_battery_ps_id);
static int axp20x_power_probe(struct platform_device *pdev)
{
struct axp20x_batt_ps *axp20x_batt;
struct power_supply_config psy_cfg = {};
struct power_supply_battery_info *info;
struct device *dev = &pdev->dev;
if (!of_device_is_available(pdev->dev.of_node))
return -ENODEV;
axp20x_batt = devm_kzalloc(&pdev->dev, sizeof(*axp20x_batt),
GFP_KERNEL);
if (!axp20x_batt)
return -ENOMEM;
axp20x_batt->dev = &pdev->dev;
axp20x_batt->batt_v = devm_iio_channel_get(&pdev->dev, "batt_v");
if (IS_ERR(axp20x_batt->batt_v)) {
if (PTR_ERR(axp20x_batt->batt_v) == -ENODEV)
return -EPROBE_DEFER;
return PTR_ERR(axp20x_batt->batt_v);
}
axp20x_batt->batt_chrg_i = devm_iio_channel_get(&pdev->dev,
"batt_chrg_i");
if (IS_ERR(axp20x_batt->batt_chrg_i)) {
if (PTR_ERR(axp20x_batt->batt_chrg_i) == -ENODEV)
return -EPROBE_DEFER;
return PTR_ERR(axp20x_batt->batt_chrg_i);
}
axp20x_batt->batt_dischrg_i = devm_iio_channel_get(&pdev->dev,
"batt_dischrg_i");
if (IS_ERR(axp20x_batt->batt_dischrg_i)) {
if (PTR_ERR(axp20x_batt->batt_dischrg_i) == -ENODEV)
return -EPROBE_DEFER;
return PTR_ERR(axp20x_batt->batt_dischrg_i);
}
axp20x_batt->regmap = dev_get_regmap(pdev->dev.parent, NULL);
platform_set_drvdata(pdev, axp20x_batt);
psy_cfg.drv_data = axp20x_batt;
psy_cfg.of_node = pdev->dev.of_node;
axp20x_batt->data = (struct axp_data *)of_device_get_match_data(dev);
axp20x_batt->batt = devm_power_supply_register(&pdev->dev,
&axp20x_batt_ps_desc,
&psy_cfg);
if (IS_ERR(axp20x_batt->batt)) {
dev_err(&pdev->dev, "failed to register power supply: %ld\n",
PTR_ERR(axp20x_batt->batt));
return PTR_ERR(axp20x_batt->batt);
}
if (!power_supply_get_battery_info(axp20x_batt->batt, &info)) {
int vmin = info->voltage_min_design_uv;
int ccc = info->constant_charge_current_max_ua;
if (vmin > 0 && axp20x_set_voltage_min_design(axp20x_batt,
vmin))
dev_err(&pdev->dev,
"couldn't set voltage_min_design\n");
/* Set max to unverified value to be able to set CCC */
axp20x_batt->max_ccc = ccc;
if (ccc <= 0 || axp20x_set_constant_charge_current(axp20x_batt,
ccc)) {
dev_err(&pdev->dev,
"couldn't set constant charge current from DT: fallback to minimum value\n");
ccc = 300000;
axp20x_batt->max_ccc = ccc;
axp20x_set_constant_charge_current(axp20x_batt, ccc);
}
}
/*
* Update max CCC to a valid value if battery info is present or set it
* to current register value by default.
*/
axp20x_get_constant_charge_current(axp20x_batt,
&axp20x_batt->max_ccc);
return 0;
}
static struct platform_driver axp20x_batt_driver = {
.probe = axp20x_power_probe,
.driver = {
.name = "axp20x-battery-power-supply",
.of_match_table = axp20x_battery_ps_id,
},
};
module_platform_driver(axp20x_batt_driver);
MODULE_DESCRIPTION("Battery power supply driver for AXP20X and AXP22X PMICs");
MODULE_AUTHOR("Quentin Schulz <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/axp20x_battery.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Battery driver for the Ingenic JZ47xx SoCs
* Copyright (c) 2019 Artur Rojek <[email protected]>
*
* based on drivers/power/supply/jz4740-battery.c
*/
#include <linux/iio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/property.h>
struct ingenic_battery {
struct device *dev;
struct iio_channel *channel;
struct power_supply_desc desc;
struct power_supply *battery;
struct power_supply_battery_info *info;
};
static int ingenic_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct ingenic_battery *bat = power_supply_get_drvdata(psy);
struct power_supply_battery_info *info = bat->info;
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_HEALTH:
ret = iio_read_channel_processed(bat->channel, &val->intval);
val->intval *= 1000;
if (val->intval < info->voltage_min_design_uv)
val->intval = POWER_SUPPLY_HEALTH_DEAD;
else if (val->intval > info->voltage_max_design_uv)
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
else
val->intval = POWER_SUPPLY_HEALTH_GOOD;
return ret;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = iio_read_channel_processed(bat->channel, &val->intval);
val->intval *= 1000;
return ret;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
val->intval = info->voltage_min_design_uv;
return 0;
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
val->intval = info->voltage_max_design_uv;
return 0;
default:
return -EINVAL;
}
}
/* Set the most appropriate IIO channel voltage reference scale
* based on the battery's max voltage.
*/
static int ingenic_battery_set_scale(struct ingenic_battery *bat)
{
const int *scale_raw;
int scale_len, scale_type, best_idx = -1, best_mV, max_raw, i, ret;
u64 max_mV;
ret = iio_read_max_channel_raw(bat->channel, &max_raw);
if (ret) {
dev_err(bat->dev, "Unable to read max raw channel value\n");
return ret;
}
ret = iio_read_avail_channel_attribute(bat->channel, &scale_raw,
&scale_type, &scale_len,
IIO_CHAN_INFO_SCALE);
if (ret < 0) {
dev_err(bat->dev, "Unable to read channel avail scale\n");
return ret;
}
if (ret != IIO_AVAIL_LIST || scale_type != IIO_VAL_FRACTIONAL_LOG2)
return -EINVAL;
max_mV = bat->info->voltage_max_design_uv / 1000;
for (i = 0; i < scale_len; i += 2) {
u64 scale_mV = (max_raw * scale_raw[i]) >> scale_raw[i + 1];
if (scale_mV < max_mV)
continue;
if (best_idx >= 0 && scale_mV > best_mV)
continue;
best_mV = scale_mV;
best_idx = i;
}
if (best_idx < 0) {
dev_err(bat->dev, "Unable to find matching voltage scale\n");
return -EINVAL;
}
/* Only set scale if there is more than one (fractional) entry */
if (scale_len > 2) {
ret = iio_write_channel_attribute(bat->channel,
scale_raw[best_idx],
scale_raw[best_idx + 1],
IIO_CHAN_INFO_SCALE);
if (ret)
return ret;
}
return 0;
}
static enum power_supply_property ingenic_battery_properties[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
};
static int ingenic_battery_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct ingenic_battery *bat;
struct power_supply_config psy_cfg = {};
struct power_supply_desc *desc;
int ret;
bat = devm_kzalloc(dev, sizeof(*bat), GFP_KERNEL);
if (!bat)
return -ENOMEM;
bat->dev = dev;
bat->channel = devm_iio_channel_get(dev, "battery");
if (IS_ERR(bat->channel))
return PTR_ERR(bat->channel);
desc = &bat->desc;
desc->name = "jz-battery";
desc->type = POWER_SUPPLY_TYPE_BATTERY;
desc->properties = ingenic_battery_properties;
desc->num_properties = ARRAY_SIZE(ingenic_battery_properties);
desc->get_property = ingenic_battery_get_property;
psy_cfg.drv_data = bat;
psy_cfg.of_node = dev->of_node;
bat->battery = devm_power_supply_register(dev, desc, &psy_cfg);
if (IS_ERR(bat->battery))
return dev_err_probe(dev, PTR_ERR(bat->battery),
"Unable to register battery\n");
ret = power_supply_get_battery_info(bat->battery, &bat->info);
if (ret) {
dev_err(dev, "Unable to get battery info: %d\n", ret);
return ret;
}
if (bat->info->voltage_min_design_uv < 0) {
dev_err(dev, "Unable to get voltage min design\n");
return bat->info->voltage_min_design_uv;
}
if (bat->info->voltage_max_design_uv < 0) {
dev_err(dev, "Unable to get voltage max design\n");
return bat->info->voltage_max_design_uv;
}
return ingenic_battery_set_scale(bat);
}
#ifdef CONFIG_OF
static const struct of_device_id ingenic_battery_of_match[] = {
{ .compatible = "ingenic,jz4740-battery", },
{ },
};
MODULE_DEVICE_TABLE(of, ingenic_battery_of_match);
#endif
static struct platform_driver ingenic_battery_driver = {
.driver = {
.name = "ingenic-battery",
.of_match_table = of_match_ptr(ingenic_battery_of_match),
},
.probe = ingenic_battery_probe,
};
module_platform_driver(ingenic_battery_driver);
MODULE_DESCRIPTION("Battery driver for Ingenic JZ47xx SoCs");
MODULE_AUTHOR("Artur Rojek <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/ingenic-battery.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Battery data and characteristics for Samsung SDI (Samsung Digital Interface)
* batteries. The data is retrieved automatically into drivers using
* the power_supply_get_battery_info() call.
*
* The BTI (battery type indicator) resistance in the code drops was very
* unreliable. The resistance listed here was obtained by simply measuring
* the BTI resistance with a multimeter on the battery.
*/
#include <linux/module.h>
#include <linux/power_supply.h>
#include "samsung-sdi-battery.h"
struct samsung_sdi_battery {
char *compatible;
char *name;
struct power_supply_battery_info info;
};
/*
* Voltage to internal resistance tables. The internal resistance varies
* depending on the VBAT voltage, so look this up from a table. Different
* tables apply depending on whether we are charging or not.
*/
static struct power_supply_vbat_ri_table samsung_vbat2res_discharging_eb_l1m7flu[] = {
{ .vbat_uv = 4240000, .ri_uohm = 160000 },
{ .vbat_uv = 4210000, .ri_uohm = 179000 },
{ .vbat_uv = 4180000, .ri_uohm = 183000 },
{ .vbat_uv = 4160000, .ri_uohm = 184000 },
{ .vbat_uv = 4140000, .ri_uohm = 191000 },
{ .vbat_uv = 4120000, .ri_uohm = 204000 },
{ .vbat_uv = 4076000, .ri_uohm = 220000 },
{ .vbat_uv = 4030000, .ri_uohm = 227000 },
{ .vbat_uv = 3986000, .ri_uohm = 215000 },
{ .vbat_uv = 3916000, .ri_uohm = 221000 },
{ .vbat_uv = 3842000, .ri_uohm = 259000 },
{ .vbat_uv = 3773000, .ri_uohm = 287000 },
{ .vbat_uv = 3742000, .ri_uohm = 283000 },
{ .vbat_uv = 3709000, .ri_uohm = 277000 },
{ .vbat_uv = 3685000, .ri_uohm = 297000 },
{ .vbat_uv = 3646000, .ri_uohm = 310000 },
{ .vbat_uv = 3616000, .ri_uohm = 331000 },
{ .vbat_uv = 3602000, .ri_uohm = 370000 },
{ .vbat_uv = 3578000, .ri_uohm = 350000 },
{ .vbat_uv = 3553000, .ri_uohm = 321000 },
{ .vbat_uv = 3503000, .ri_uohm = 322000 },
{ .vbat_uv = 3400000, .ri_uohm = 269000 },
{ .vbat_uv = 3360000, .ri_uohm = 328000 },
{ .vbat_uv = 3330000, .ri_uohm = 305000 },
{ .vbat_uv = 3300000, .ri_uohm = 339000 },
};
static struct power_supply_vbat_ri_table samsung_vbat2res_charging_eb_l1m7flu[] = {
{ .vbat_uv = 4302000, .ri_uohm = 230000 },
{ .vbat_uv = 4276000, .ri_uohm = 345000 },
{ .vbat_uv = 4227000, .ri_uohm = 345000 },
{ .vbat_uv = 4171000, .ri_uohm = 346000 },
{ .vbat_uv = 4134000, .ri_uohm = 311000 },
{ .vbat_uv = 4084000, .ri_uohm = 299000 },
{ .vbat_uv = 4052000, .ri_uohm = 316000 },
{ .vbat_uv = 4012000, .ri_uohm = 309000 },
{ .vbat_uv = 3961000, .ri_uohm = 303000 },
{ .vbat_uv = 3939000, .ri_uohm = 280000 },
{ .vbat_uv = 3904000, .ri_uohm = 261000 },
{ .vbat_uv = 3850000, .ri_uohm = 212000 },
{ .vbat_uv = 3800000, .ri_uohm = 232000 },
{ .vbat_uv = 3750000, .ri_uohm = 177000 },
{ .vbat_uv = 3712000, .ri_uohm = 164000 },
{ .vbat_uv = 3674000, .ri_uohm = 161000 },
{ .vbat_uv = 3590000, .ri_uohm = 164000 },
};
static struct power_supply_vbat_ri_table samsung_vbat2res_discharging_eb425161la[] = {
{ .vbat_uv = 4240000, .ri_uohm = 160000 },
{ .vbat_uv = 4210000, .ri_uohm = 179000 },
{ .vbat_uv = 4180000, .ri_uohm = 183000 },
{ .vbat_uv = 4160000, .ri_uohm = 184000 },
{ .vbat_uv = 4140000, .ri_uohm = 191000 },
{ .vbat_uv = 4120000, .ri_uohm = 204000 },
{ .vbat_uv = 4080000, .ri_uohm = 200000 },
{ .vbat_uv = 4027000, .ri_uohm = 202000 },
{ .vbat_uv = 3916000, .ri_uohm = 221000 },
{ .vbat_uv = 3842000, .ri_uohm = 259000 },
{ .vbat_uv = 3800000, .ri_uohm = 262000 },
{ .vbat_uv = 3742000, .ri_uohm = 263000 },
{ .vbat_uv = 3709000, .ri_uohm = 277000 },
{ .vbat_uv = 3685000, .ri_uohm = 312000 },
{ .vbat_uv = 3668000, .ri_uohm = 258000 },
{ .vbat_uv = 3660000, .ri_uohm = 247000 },
{ .vbat_uv = 3636000, .ri_uohm = 293000 },
{ .vbat_uv = 3616000, .ri_uohm = 331000 },
{ .vbat_uv = 3600000, .ri_uohm = 349000 },
{ .vbat_uv = 3593000, .ri_uohm = 345000 },
{ .vbat_uv = 3585000, .ri_uohm = 344000 },
{ .vbat_uv = 3572000, .ri_uohm = 336000 },
{ .vbat_uv = 3553000, .ri_uohm = 321000 },
{ .vbat_uv = 3517000, .ri_uohm = 336000 },
{ .vbat_uv = 3503000, .ri_uohm = 322000 },
{ .vbat_uv = 3400000, .ri_uohm = 269000 },
{ .vbat_uv = 3360000, .ri_uohm = 328000 },
{ .vbat_uv = 3330000, .ri_uohm = 305000 },
{ .vbat_uv = 3300000, .ri_uohm = 339000 },
};
static struct power_supply_vbat_ri_table samsung_vbat2res_charging_eb425161la[] = {
{ .vbat_uv = 4345000, .ri_uohm = 230000 },
{ .vbat_uv = 4329000, .ri_uohm = 238000 },
{ .vbat_uv = 4314000, .ri_uohm = 225000 },
{ .vbat_uv = 4311000, .ri_uohm = 239000 },
{ .vbat_uv = 4294000, .ri_uohm = 235000 },
{ .vbat_uv = 4264000, .ri_uohm = 229000 },
{ .vbat_uv = 4262000, .ri_uohm = 228000 },
{ .vbat_uv = 4252000, .ri_uohm = 236000 },
{ .vbat_uv = 4244000, .ri_uohm = 234000 },
{ .vbat_uv = 4235000, .ri_uohm = 234000 },
{ .vbat_uv = 4227000, .ri_uohm = 238000 },
{ .vbat_uv = 4219000, .ri_uohm = 242000 },
{ .vbat_uv = 4212000, .ri_uohm = 239000 },
{ .vbat_uv = 4206000, .ri_uohm = 231000 },
{ .vbat_uv = 4201000, .ri_uohm = 231000 },
{ .vbat_uv = 4192000, .ri_uohm = 224000 },
{ .vbat_uv = 4184000, .ri_uohm = 238000 },
{ .vbat_uv = 4173000, .ri_uohm = 245000 },
{ .vbat_uv = 4161000, .ri_uohm = 244000 },
{ .vbat_uv = 4146000, .ri_uohm = 244000 },
{ .vbat_uv = 4127000, .ri_uohm = 228000 },
{ .vbat_uv = 4119000, .ri_uohm = 218000 },
{ .vbat_uv = 4112000, .ri_uohm = 215000 },
{ .vbat_uv = 4108000, .ri_uohm = 209000 },
{ .vbat_uv = 4102000, .ri_uohm = 214000 },
{ .vbat_uv = 4096000, .ri_uohm = 215000 },
{ .vbat_uv = 4090000, .ri_uohm = 215000 },
{ .vbat_uv = 4083000, .ri_uohm = 219000 },
{ .vbat_uv = 4078000, .ri_uohm = 208000 },
{ .vbat_uv = 4071000, .ri_uohm = 205000 },
{ .vbat_uv = 4066000, .ri_uohm = 208000 },
{ .vbat_uv = 4061000, .ri_uohm = 210000 },
{ .vbat_uv = 4055000, .ri_uohm = 212000 },
{ .vbat_uv = 4049000, .ri_uohm = 215000 },
{ .vbat_uv = 4042000, .ri_uohm = 212000 },
{ .vbat_uv = 4032000, .ri_uohm = 217000 },
{ .vbat_uv = 4027000, .ri_uohm = 220000 },
{ .vbat_uv = 4020000, .ri_uohm = 210000 },
{ .vbat_uv = 4013000, .ri_uohm = 214000 },
{ .vbat_uv = 4007000, .ri_uohm = 219000 },
{ .vbat_uv = 4003000, .ri_uohm = 229000 },
{ .vbat_uv = 3996000, .ri_uohm = 246000 },
{ .vbat_uv = 3990000, .ri_uohm = 245000 },
{ .vbat_uv = 3984000, .ri_uohm = 242000 },
{ .vbat_uv = 3977000, .ri_uohm = 236000 },
{ .vbat_uv = 3971000, .ri_uohm = 231000 },
{ .vbat_uv = 3966000, .ri_uohm = 229000 },
{ .vbat_uv = 3952000, .ri_uohm = 226000 },
{ .vbat_uv = 3946000, .ri_uohm = 222000 },
{ .vbat_uv = 3941000, .ri_uohm = 222000 },
{ .vbat_uv = 3936000, .ri_uohm = 217000 },
{ .vbat_uv = 3932000, .ri_uohm = 217000 },
{ .vbat_uv = 3928000, .ri_uohm = 212000 },
{ .vbat_uv = 3926000, .ri_uohm = 214000 },
{ .vbat_uv = 3922000, .ri_uohm = 209000 },
{ .vbat_uv = 3917000, .ri_uohm = 215000 },
{ .vbat_uv = 3914000, .ri_uohm = 212000 },
{ .vbat_uv = 3912000, .ri_uohm = 220000 },
{ .vbat_uv = 3910000, .ri_uohm = 226000 },
{ .vbat_uv = 3903000, .ri_uohm = 226000 },
{ .vbat_uv = 3891000, .ri_uohm = 222000 },
{ .vbat_uv = 3871000, .ri_uohm = 221000 },
{ .vbat_uv = 3857000, .ri_uohm = 219000 },
{ .vbat_uv = 3850000, .ri_uohm = 216000 },
{ .vbat_uv = 3843000, .ri_uohm = 212000 },
{ .vbat_uv = 3835000, .ri_uohm = 206000 },
{ .vbat_uv = 3825000, .ri_uohm = 217000 },
{ .vbat_uv = 3824000, .ri_uohm = 220000 },
{ .vbat_uv = 3820000, .ri_uohm = 237000 },
{ .vbat_uv = 3800000, .ri_uohm = 232000 },
{ .vbat_uv = 3750000, .ri_uohm = 177000 },
{ .vbat_uv = 3712000, .ri_uohm = 164000 },
{ .vbat_uv = 3674000, .ri_uohm = 161000 },
{ .vbat_uv = 3590000, .ri_uohm = 164000 },
};
static struct power_supply_vbat_ri_table samsung_vbat2res_discharging_eb425161lu[] = {
{ .vbat_uv = 4240000, .ri_uohm = 160000 },
{ .vbat_uv = 4210000, .ri_uohm = 179000 },
{ .vbat_uv = 4180000, .ri_uohm = 183000 },
{ .vbat_uv = 4160000, .ri_uohm = 184000 },
{ .vbat_uv = 4140000, .ri_uohm = 191000 },
{ .vbat_uv = 4120000, .ri_uohm = 204000 },
{ .vbat_uv = 4080000, .ri_uohm = 200000 },
{ .vbat_uv = 4027000, .ri_uohm = 202000 },
{ .vbat_uv = 3916000, .ri_uohm = 221000 },
{ .vbat_uv = 3842000, .ri_uohm = 259000 },
{ .vbat_uv = 3800000, .ri_uohm = 262000 },
{ .vbat_uv = 3742000, .ri_uohm = 263000 },
{ .vbat_uv = 3708000, .ri_uohm = 277000 },
{ .vbat_uv = 3684000, .ri_uohm = 272000 },
{ .vbat_uv = 3664000, .ri_uohm = 278000 },
{ .vbat_uv = 3655000, .ri_uohm = 285000 },
{ .vbat_uv = 3638000, .ri_uohm = 261000 },
{ .vbat_uv = 3624000, .ri_uohm = 259000 },
{ .vbat_uv = 3616000, .ri_uohm = 266000 },
{ .vbat_uv = 3597000, .ri_uohm = 278000 },
{ .vbat_uv = 3581000, .ri_uohm = 281000 },
{ .vbat_uv = 3560000, .ri_uohm = 287000 },
{ .vbat_uv = 3527000, .ri_uohm = 289000 },
{ .vbat_uv = 3512000, .ri_uohm = 286000 },
{ .vbat_uv = 3494000, .ri_uohm = 282000 },
{ .vbat_uv = 3400000, .ri_uohm = 269000 },
{ .vbat_uv = 3360000, .ri_uohm = 328000 },
{ .vbat_uv = 3330000, .ri_uohm = 305000 },
{ .vbat_uv = 3300000, .ri_uohm = 339000 },
};
static struct power_supply_vbat_ri_table samsung_vbat2res_charging_eb425161lu[] = {
{ .vbat_uv = 4346000, .ri_uohm = 293000 },
{ .vbat_uv = 4336000, .ri_uohm = 290000 },
{ .vbat_uv = 4315000, .ri_uohm = 274000 },
{ .vbat_uv = 4310000, .ri_uohm = 264000 },
{ .vbat_uv = 4275000, .ri_uohm = 275000 },
{ .vbat_uv = 4267000, .ri_uohm = 274000 },
{ .vbat_uv = 4227000, .ri_uohm = 262000 },
{ .vbat_uv = 4186000, .ri_uohm = 282000 },
{ .vbat_uv = 4136000, .ri_uohm = 246000 },
{ .vbat_uv = 4110000, .ri_uohm = 242000 },
{ .vbat_uv = 4077000, .ri_uohm = 249000 },
{ .vbat_uv = 4049000, .ri_uohm = 238000 },
{ .vbat_uv = 4017000, .ri_uohm = 268000 },
{ .vbat_uv = 3986000, .ri_uohm = 261000 },
{ .vbat_uv = 3962000, .ri_uohm = 252000 },
{ .vbat_uv = 3940000, .ri_uohm = 235000 },
{ .vbat_uv = 3930000, .ri_uohm = 237000 },
{ .vbat_uv = 3924000, .ri_uohm = 255000 },
{ .vbat_uv = 3910000, .ri_uohm = 244000 },
{ .vbat_uv = 3889000, .ri_uohm = 231000 },
{ .vbat_uv = 3875000, .ri_uohm = 249000 },
{ .vbat_uv = 3850000, .ri_uohm = 212000 },
{ .vbat_uv = 3800000, .ri_uohm = 232000 },
{ .vbat_uv = 3750000, .ri_uohm = 177000 },
{ .vbat_uv = 3712000, .ri_uohm = 164000 },
{ .vbat_uv = 3674000, .ri_uohm = 161000 },
{ .vbat_uv = 3590000, .ri_uohm = 164000 },
};
static struct power_supply_vbat_ri_table samsung_vbat2res_discharging_eb485159lu[] = {
{ .vbat_uv = 4240000, .ri_uohm = 160000 },
{ .vbat_uv = 4210000, .ri_uohm = 179000 },
{ .vbat_uv = 4180000, .ri_uohm = 183000 },
{ .vbat_uv = 4160000, .ri_uohm = 184000 },
{ .vbat_uv = 4140000, .ri_uohm = 191000 },
{ .vbat_uv = 4120000, .ri_uohm = 204000 },
{ .vbat_uv = 4080000, .ri_uohm = 200000 },
{ .vbat_uv = 4027000, .ri_uohm = 202000 },
{ .vbat_uv = 3916000, .ri_uohm = 221000 },
{ .vbat_uv = 3842000, .ri_uohm = 259000 },
{ .vbat_uv = 3800000, .ri_uohm = 262000 },
{ .vbat_uv = 3715000, .ri_uohm = 340000 },
{ .vbat_uv = 3700000, .ri_uohm = 300000 },
{ .vbat_uv = 3682000, .ri_uohm = 233000 },
{ .vbat_uv = 3655000, .ri_uohm = 246000 },
{ .vbat_uv = 3639000, .ri_uohm = 260000 },
{ .vbat_uv = 3621000, .ri_uohm = 254000 },
{ .vbat_uv = 3583000, .ri_uohm = 266000 },
{ .vbat_uv = 3536000, .ri_uohm = 274000 },
{ .vbat_uv = 3502000, .ri_uohm = 300000 },
{ .vbat_uv = 3465000, .ri_uohm = 245000 },
{ .vbat_uv = 3438000, .ri_uohm = 225000 },
{ .vbat_uv = 3330000, .ri_uohm = 305000 },
{ .vbat_uv = 3300000, .ri_uohm = 339000 },
};
static struct power_supply_vbat_ri_table samsung_vbat2res_charging_eb485159lu[] = {
{ .vbat_uv = 4302000, .ri_uohm = 200000 },
{ .vbat_uv = 4258000, .ri_uohm = 206000 },
{ .vbat_uv = 4200000, .ri_uohm = 231000 },
{ .vbat_uv = 4150000, .ri_uohm = 198000 },
{ .vbat_uv = 4134000, .ri_uohm = 268000 },
{ .vbat_uv = 4058000, .ri_uohm = 172000 },
{ .vbat_uv = 4003000, .ri_uohm = 227000 },
{ .vbat_uv = 3972000, .ri_uohm = 241000 },
{ .vbat_uv = 3953000, .ri_uohm = 244000 },
{ .vbat_uv = 3950000, .ri_uohm = 213000 },
{ .vbat_uv = 3900000, .ri_uohm = 225000 },
{ .vbat_uv = 3850000, .ri_uohm = 212000 },
{ .vbat_uv = 3800000, .ri_uohm = 232000 },
{ .vbat_uv = 3750000, .ri_uohm = 177000 },
{ .vbat_uv = 3712000, .ri_uohm = 164000 },
{ .vbat_uv = 3674000, .ri_uohm = 161000 },
{ .vbat_uv = 3590000, .ri_uohm = 164000 },
};
static struct power_supply_vbat_ri_table samsung_vbat2res_discharging_eb535151vu[] = {
{ .vbat_uv = 4071000, .ri_uohm = 158000 },
{ .vbat_uv = 4019000, .ri_uohm = 187000 },
{ .vbat_uv = 3951000, .ri_uohm = 191000 },
{ .vbat_uv = 3901000, .ri_uohm = 193000 },
{ .vbat_uv = 3850000, .ri_uohm = 273000 },
{ .vbat_uv = 3800000, .ri_uohm = 305000 },
{ .vbat_uv = 3750000, .ri_uohm = 205000 },
{ .vbat_uv = 3700000, .ri_uohm = 290000 },
{ .vbat_uv = 3650000, .ri_uohm = 262000 },
{ .vbat_uv = 3618000, .ri_uohm = 290000 },
{ .vbat_uv = 3505000, .ri_uohm = 235000 },
{ .vbat_uv = 3484000, .ri_uohm = 253000 },
{ .vbat_uv = 3413000, .ri_uohm = 243000 },
{ .vbat_uv = 3393000, .ri_uohm = 285000 },
{ .vbat_uv = 3361000, .ri_uohm = 281000 },
{ .vbat_uv = 3302000, .ri_uohm = 286000 },
{ .vbat_uv = 3280000, .ri_uohm = 250000 },
};
static struct power_supply_vbat_ri_table samsung_vbat2res_charging_eb535151vu[] = {
{ .vbat_uv = 4190000, .ri_uohm = 214000 },
{ .vbat_uv = 4159000, .ri_uohm = 252000 },
{ .vbat_uv = 4121000, .ri_uohm = 245000 },
{ .vbat_uv = 4069000, .ri_uohm = 228000 },
{ .vbat_uv = 4046000, .ri_uohm = 229000 },
{ .vbat_uv = 4026000, .ri_uohm = 233000 },
{ .vbat_uv = 4007000, .ri_uohm = 240000 },
{ .vbat_uv = 3982000, .ri_uohm = 291000 },
{ .vbat_uv = 3945000, .ri_uohm = 276000 },
{ .vbat_uv = 3924000, .ri_uohm = 266000 },
{ .vbat_uv = 3910000, .ri_uohm = 258000 },
{ .vbat_uv = 3900000, .ri_uohm = 271000 },
{ .vbat_uv = 3844000, .ri_uohm = 279000 },
{ .vbat_uv = 3772000, .ri_uohm = 217000 },
{ .vbat_uv = 3673000, .ri_uohm = 208000 },
{ .vbat_uv = 3571000, .ri_uohm = 208000 },
{ .vbat_uv = 3510000, .ri_uohm = 228000 },
};
static struct power_supply_vbat_ri_table samsung_vbat2res_discharging_eb585157lu[] = {
{ .vbat_uv = 4194000, .ri_uohm = 121000 },
{ .vbat_uv = 4169000, .ri_uohm = 188000 },
{ .vbat_uv = 4136000, .ri_uohm = 173000 },
{ .vbat_uv = 4108000, .ri_uohm = 158000 },
{ .vbat_uv = 4064000, .ri_uohm = 143000 },
{ .vbat_uv = 3956000, .ri_uohm = 160000 },
{ .vbat_uv = 3847000, .ri_uohm = 262000 },
{ .vbat_uv = 3806000, .ri_uohm = 280000 },
{ .vbat_uv = 3801000, .ri_uohm = 266000 },
{ .vbat_uv = 3794000, .ri_uohm = 259000 },
{ .vbat_uv = 3785000, .ri_uohm = 234000 },
{ .vbat_uv = 3779000, .ri_uohm = 227000 },
{ .vbat_uv = 3772000, .ri_uohm = 222000 },
{ .vbat_uv = 3765000, .ri_uohm = 221000 },
{ .vbat_uv = 3759000, .ri_uohm = 216000 },
{ .vbat_uv = 3754000, .ri_uohm = 206000 },
{ .vbat_uv = 3747000, .ri_uohm = 212000 },
{ .vbat_uv = 3743000, .ri_uohm = 208000 },
{ .vbat_uv = 3737000, .ri_uohm = 212000 },
{ .vbat_uv = 3733000, .ri_uohm = 200000 },
{ .vbat_uv = 3728000, .ri_uohm = 203000 },
{ .vbat_uv = 3722000, .ri_uohm = 207000 },
{ .vbat_uv = 3719000, .ri_uohm = 208000 },
{ .vbat_uv = 3715000, .ri_uohm = 209000 },
{ .vbat_uv = 3712000, .ri_uohm = 211000 },
{ .vbat_uv = 3709000, .ri_uohm = 210000 },
{ .vbat_uv = 3704000, .ri_uohm = 216000 },
{ .vbat_uv = 3701000, .ri_uohm = 218000 },
{ .vbat_uv = 3698000, .ri_uohm = 222000 },
{ .vbat_uv = 3694000, .ri_uohm = 218000 },
{ .vbat_uv = 3692000, .ri_uohm = 215000 },
{ .vbat_uv = 3688000, .ri_uohm = 224000 },
{ .vbat_uv = 3686000, .ri_uohm = 224000 },
{ .vbat_uv = 3683000, .ri_uohm = 228000 },
{ .vbat_uv = 3681000, .ri_uohm = 228000 },
{ .vbat_uv = 3679000, .ri_uohm = 229000 },
{ .vbat_uv = 3676000, .ri_uohm = 232000 },
{ .vbat_uv = 3675000, .ri_uohm = 229000 },
{ .vbat_uv = 3673000, .ri_uohm = 229000 },
{ .vbat_uv = 3672000, .ri_uohm = 223000 },
{ .vbat_uv = 3669000, .ri_uohm = 224000 },
{ .vbat_uv = 3666000, .ri_uohm = 224000 },
{ .vbat_uv = 3663000, .ri_uohm = 221000 },
{ .vbat_uv = 3660000, .ri_uohm = 218000 },
{ .vbat_uv = 3657000, .ri_uohm = 215000 },
{ .vbat_uv = 3654000, .ri_uohm = 212000 },
{ .vbat_uv = 3649000, .ri_uohm = 215000 },
{ .vbat_uv = 3644000, .ri_uohm = 215000 },
{ .vbat_uv = 3636000, .ri_uohm = 215000 },
{ .vbat_uv = 3631000, .ri_uohm = 206000 },
{ .vbat_uv = 3623000, .ri_uohm = 205000 },
{ .vbat_uv = 3616000, .ri_uohm = 193000 },
{ .vbat_uv = 3605000, .ri_uohm = 193000 },
{ .vbat_uv = 3600000, .ri_uohm = 198000 },
{ .vbat_uv = 3597000, .ri_uohm = 198000 },
{ .vbat_uv = 3592000, .ri_uohm = 203000 },
{ .vbat_uv = 3591000, .ri_uohm = 188000 },
{ .vbat_uv = 3587000, .ri_uohm = 188000 },
{ .vbat_uv = 3583000, .ri_uohm = 177000 },
{ .vbat_uv = 3577000, .ri_uohm = 170000 },
{ .vbat_uv = 3568000, .ri_uohm = 135000 },
{ .vbat_uv = 3552000, .ri_uohm = 54000 },
{ .vbat_uv = 3526000, .ri_uohm = 130000 },
{ .vbat_uv = 3501000, .ri_uohm = 48000 },
{ .vbat_uv = 3442000, .ri_uohm = 183000 },
{ .vbat_uv = 3326000, .ri_uohm = 372000 },
{ .vbat_uv = 3161000, .ri_uohm = 452000 },
};
static struct power_supply_vbat_ri_table samsung_vbat2res_charging_eb585157lu[] = {
{ .vbat_uv = 4360000, .ri_uohm = 128000 },
{ .vbat_uv = 4325000, .ri_uohm = 130000 },
{ .vbat_uv = 4316000, .ri_uohm = 148000 },
{ .vbat_uv = 4308000, .ri_uohm = 162000 },
{ .vbat_uv = 4301000, .ri_uohm = 162000 },
{ .vbat_uv = 4250000, .ri_uohm = 162000 },
{ .vbat_uv = 4230000, .ri_uohm = 164000 },
{ .vbat_uv = 4030000, .ri_uohm = 164000 },
{ .vbat_uv = 4000000, .ri_uohm = 193000 },
{ .vbat_uv = 3950000, .ri_uohm = 204000 },
{ .vbat_uv = 3850000, .ri_uohm = 210000 },
{ .vbat_uv = 3800000, .ri_uohm = 230000 },
{ .vbat_uv = 3790000, .ri_uohm = 240000 },
{ .vbat_uv = 3780000, .ri_uohm = 311000 },
{ .vbat_uv = 3760000, .ri_uohm = 420000 },
{ .vbat_uv = 3700000, .ri_uohm = 504000 },
{ .vbat_uv = 3600000, .ri_uohm = 565000 },
};
/*
* Temperature to internal resistance scaling tables.
*
* "resistance" is the percentage of the resistance determined from the voltage
* so this represents the capacity ratio at different temperatures.
*
* FIXME: the proper table is missing: Samsung does not provide the necessary
* temperature compensation tables so we just state 100% for every temperature.
* If you have the datasheets, please provide these tables.
*/
static struct power_supply_resistance_temp_table samsung_temp2res[] = {
{ .temp = 50, .resistance = 100 },
{ .temp = 40, .resistance = 100 },
{ .temp = 30, .resistance = 100 },
{ .temp = 20, .resistance = 100 },
{ .temp = 10, .resistance = 100 },
{ .temp = 00, .resistance = 100 },
{ .temp = -10, .resistance = 100 },
{ .temp = -20, .resistance = 100 },
};
/*
* Capacity tables for different Open Circuit Voltages (OCV).
* These must be sorted by falling OCV value.
*/
static struct power_supply_battery_ocv_table samsung_ocv_cap_eb485159lu[] = {
{ .ocv = 4330000, .capacity = 100},
{ .ocv = 4320000, .capacity = 99},
{ .ocv = 4283000, .capacity = 95},
{ .ocv = 4246000, .capacity = 92},
{ .ocv = 4211000, .capacity = 89},
{ .ocv = 4167000, .capacity = 85},
{ .ocv = 4146000, .capacity = 83},
{ .ocv = 4124000, .capacity = 81},
{ .ocv = 4062000, .capacity = 75},
{ .ocv = 4013000, .capacity = 70},
{ .ocv = 3977000, .capacity = 66},
{ .ocv = 3931000, .capacity = 60},
{ .ocv = 3914000, .capacity = 58},
{ .ocv = 3901000, .capacity = 57},
{ .ocv = 3884000, .capacity = 56},
{ .ocv = 3870000, .capacity = 55},
{ .ocv = 3862000, .capacity = 54},
{ .ocv = 3854000, .capacity = 53},
{ .ocv = 3838000, .capacity = 50},
{ .ocv = 3823000, .capacity = 47},
{ .ocv = 3813000, .capacity = 45},
{ .ocv = 3807000, .capacity = 43},
{ .ocv = 3800000, .capacity = 41},
{ .ocv = 3795000, .capacity = 40},
{ .ocv = 3786000, .capacity = 37},
{ .ocv = 3783000, .capacity = 35},
{ .ocv = 3773000, .capacity = 30},
{ .ocv = 3758000, .capacity = 25},
{ .ocv = 3745000, .capacity = 22},
{ .ocv = 3738000, .capacity = 20},
{ .ocv = 3733000, .capacity = 19},
{ .ocv = 3716000, .capacity = 17},
{ .ocv = 3709000, .capacity = 16},
{ .ocv = 3698000, .capacity = 15},
{ .ocv = 3687000, .capacity = 14},
{ .ocv = 3684000, .capacity = 13},
{ .ocv = 3684000, .capacity = 12},
{ .ocv = 3678000, .capacity = 10},
{ .ocv = 3671000, .capacity = 9},
{ .ocv = 3665000, .capacity = 8},
{ .ocv = 3651000, .capacity = 7},
{ .ocv = 3634000, .capacity = 6},
{ .ocv = 3601000, .capacity = 5},
{ .ocv = 3564000, .capacity = 4},
{ .ocv = 3516000, .capacity = 3},
{ .ocv = 3456000, .capacity = 2},
{ .ocv = 3381000, .capacity = 1},
{ .ocv = 3300000, .capacity = 0},
};
/* Same capacity table is used by eb-l1m7flu, eb425161la, eb425161lu */
static struct power_supply_battery_ocv_table samsung_ocv_cap_1500mah[] = {
{ .ocv = 4328000, .capacity = 100},
{ .ocv = 4299000, .capacity = 99},
{ .ocv = 4281000, .capacity = 98},
{ .ocv = 4241000, .capacity = 95},
{ .ocv = 4183000, .capacity = 90},
{ .ocv = 4150000, .capacity = 87},
{ .ocv = 4116000, .capacity = 84},
{ .ocv = 4077000, .capacity = 80},
{ .ocv = 4068000, .capacity = 79},
{ .ocv = 4058000, .capacity = 77},
{ .ocv = 4026000, .capacity = 75},
{ .ocv = 3987000, .capacity = 72},
{ .ocv = 3974000, .capacity = 69},
{ .ocv = 3953000, .capacity = 66},
{ .ocv = 3933000, .capacity = 63},
{ .ocv = 3911000, .capacity = 60},
{ .ocv = 3900000, .capacity = 58},
{ .ocv = 3873000, .capacity = 55},
{ .ocv = 3842000, .capacity = 52},
{ .ocv = 3829000, .capacity = 50},
{ .ocv = 3810000, .capacity = 45},
{ .ocv = 3793000, .capacity = 40},
{ .ocv = 3783000, .capacity = 35},
{ .ocv = 3776000, .capacity = 30},
{ .ocv = 3762000, .capacity = 25},
{ .ocv = 3746000, .capacity = 20},
{ .ocv = 3739000, .capacity = 18},
{ .ocv = 3715000, .capacity = 15},
{ .ocv = 3700000, .capacity = 12},
{ .ocv = 3690000, .capacity = 10},
{ .ocv = 3680000, .capacity = 9},
{ .ocv = 3670000, .capacity = 7},
{ .ocv = 3656000, .capacity = 5},
{ .ocv = 3634000, .capacity = 4},
{ .ocv = 3614000, .capacity = 3},
{ .ocv = 3551000, .capacity = 2},
{ .ocv = 3458000, .capacity = 1},
{ .ocv = 3300000, .capacity = 0},
};
static struct power_supply_battery_ocv_table samsung_ocv_cap_eb535151vu[] = {
{ .ocv = 4178000, .capacity = 100},
{ .ocv = 4148000, .capacity = 99},
{ .ocv = 4105000, .capacity = 95},
{ .ocv = 4078000, .capacity = 92},
{ .ocv = 4057000, .capacity = 89},
{ .ocv = 4013000, .capacity = 85},
{ .ocv = 3988000, .capacity = 82},
{ .ocv = 3962000, .capacity = 77},
{ .ocv = 3920000, .capacity = 70},
{ .ocv = 3891000, .capacity = 65},
{ .ocv = 3874000, .capacity = 62},
{ .ocv = 3839000, .capacity = 59},
{ .ocv = 3816000, .capacity = 55},
{ .ocv = 3798000, .capacity = 50},
{ .ocv = 3778000, .capacity = 40},
{ .ocv = 3764000, .capacity = 30},
{ .ocv = 3743000, .capacity = 25},
{ .ocv = 3711000, .capacity = 20},
{ .ocv = 3691000, .capacity = 18},
{ .ocv = 3685000, .capacity = 15},
{ .ocv = 3680000, .capacity = 12},
{ .ocv = 3662000, .capacity = 10},
{ .ocv = 3638000, .capacity = 9},
{ .ocv = 3593000, .capacity = 7},
{ .ocv = 3566000, .capacity = 6},
{ .ocv = 3497000, .capacity = 4},
{ .ocv = 3405000, .capacity = 2},
{ .ocv = 3352000, .capacity = 1},
{ .ocv = 3300000, .capacity = 0},
};
static struct power_supply_battery_ocv_table samsung_ocv_cap_eb585157lu[] = {
{ .ocv = 4320000, .capacity = 100},
{ .ocv = 4296000, .capacity = 99},
{ .ocv = 4283000, .capacity = 98},
{ .ocv = 4245000, .capacity = 95},
{ .ocv = 4185000, .capacity = 90},
{ .ocv = 4152000, .capacity = 87},
{ .ocv = 4119000, .capacity = 84},
{ .ocv = 4077000, .capacity = 80},
{ .ocv = 4057000, .capacity = 78},
{ .ocv = 4048000, .capacity = 77},
{ .ocv = 4020000, .capacity = 74},
{ .ocv = 4003000, .capacity = 72},
{ .ocv = 3978000, .capacity = 69},
{ .ocv = 3955000, .capacity = 66},
{ .ocv = 3934000, .capacity = 63},
{ .ocv = 3912000, .capacity = 60},
{ .ocv = 3894000, .capacity = 58},
{ .ocv = 3860000, .capacity = 55},
{ .ocv = 3837000, .capacity = 52},
{ .ocv = 3827000, .capacity = 50},
{ .ocv = 3806000, .capacity = 45},
{ .ocv = 3791000, .capacity = 40},
{ .ocv = 3779000, .capacity = 35},
{ .ocv = 3770000, .capacity = 30},
{ .ocv = 3758000, .capacity = 25},
{ .ocv = 3739000, .capacity = 20},
{ .ocv = 3730000, .capacity = 18},
{ .ocv = 3706000, .capacity = 15},
{ .ocv = 3684000, .capacity = 13},
{ .ocv = 3675000, .capacity = 10},
{ .ocv = 3673000, .capacity = 9},
{ .ocv = 3665000, .capacity = 7},
{ .ocv = 3649000, .capacity = 5},
{ .ocv = 3628000, .capacity = 4},
{ .ocv = 3585000, .capacity = 3},
{ .ocv = 3525000, .capacity = 2},
{ .ocv = 3441000, .capacity = 1},
{ .ocv = 3300000, .capacity = 0},
};
static struct power_supply_maintenance_charge_table samsung_maint_charge_table[] = {
{
/* Maintenance charging phase A, 60 hours */
.charge_current_max_ua = 600000,
.charge_voltage_max_uv = 4150000,
.charge_safety_timer_minutes = 60*60,
},
{
/* Maintenance charging phase B, 200 hours */
.charge_current_max_ua = 600000,
.charge_voltage_max_uv = 4100000,
.charge_safety_timer_minutes = 200*60,
}
};
static struct samsung_sdi_battery samsung_sdi_batteries[] = {
{
/*
* Used in Samsung GT-I8190 "Golden"
* Data from vendor boardfile board-golden-[bm|battery].c
*/
.compatible = "samsung,eb-l1m7flu",
.name = "EB-L1M7FLU",
.info = {
.charge_full_design_uah = 1500000,
.technology = POWER_SUPPLY_TECHNOLOGY_LION,
.factory_internal_resistance_uohm = 100000,
.factory_internal_resistance_charging_uohm = 200000,
/* If you have data on this fix the min_design_uv */
.voltage_min_design_uv = 3320000,
.voltage_max_design_uv = 4340000,
.overvoltage_limit_uv = 4500000,
.constant_charge_current_max_ua = 900000,
.constant_charge_voltage_max_uv = 4320000,
.charge_term_current_ua = 200000,
.charge_restart_voltage_uv = 4300000,
.maintenance_charge = samsung_maint_charge_table,
.maintenance_charge_size = ARRAY_SIZE(samsung_maint_charge_table),
.alert_low_temp_charge_current_ua = 300000,
.alert_low_temp_charge_voltage_uv = 4000000,
.alert_high_temp_charge_current_ua = 300000,
.alert_high_temp_charge_voltage_uv = 4000000,
.temp_min = -50,
.temp_alert_min = 0,
.temp_alert_max = 40,
.temp_max = 60,
.resist_table = samsung_temp2res,
.resist_table_size = ARRAY_SIZE(samsung_temp2res),
/* If you have tables for more temperatures, add them */
.ocv_temp[0] = 25,
.ocv_table[0] = samsung_ocv_cap_1500mah,
.ocv_table_size[0] = ARRAY_SIZE(samsung_ocv_cap_1500mah),
.vbat2ri_discharging = samsung_vbat2res_discharging_eb_l1m7flu,
.vbat2ri_discharging_size = ARRAY_SIZE(samsung_vbat2res_discharging_eb_l1m7flu),
.vbat2ri_charging = samsung_vbat2res_charging_eb_l1m7flu,
.vbat2ri_charging_size = ARRAY_SIZE(samsung_vbat2res_charging_eb_l1m7flu),
.bti_resistance_ohm = 2400,
.bti_resistance_tolerance = 40,
},
},
{
/*
* Used in Samsung SGH-T599 "Codina TMO" and SGH-I407 "Kyle"
* Data from vendor boardfile board-kyle-[bm|battery].c
*/
.compatible = "samsung,eb425161la",
.name = "EB425161LA",
.info = {
.charge_full_design_uah = 1500000,
.technology = POWER_SUPPLY_TECHNOLOGY_LION,
.factory_internal_resistance_uohm = 136000,
.factory_internal_resistance_charging_uohm = 200000,
/* If you have data on this fix the min_design_uv */
.voltage_min_design_uv = 3320000,
.voltage_max_design_uv = 4340000,
.overvoltage_limit_uv = 4500000,
.constant_charge_current_max_ua = 900000,
.constant_charge_voltage_max_uv = 4320000,
.charge_term_current_ua = 200000,
.charge_restart_voltage_uv = 4270000,
.maintenance_charge = samsung_maint_charge_table,
.maintenance_charge_size = ARRAY_SIZE(samsung_maint_charge_table),
.alert_low_temp_charge_current_ua = 300000,
.alert_low_temp_charge_voltage_uv = 4000000,
.alert_high_temp_charge_current_ua = 300000,
.alert_high_temp_charge_voltage_uv = 4000000,
.temp_min = -30,
.temp_alert_min = 0,
.temp_alert_max = 40,
.temp_max = 47,
.resist_table = samsung_temp2res,
.resist_table_size = ARRAY_SIZE(samsung_temp2res),
/* If you have tables for more temperatures, add them */
.ocv_temp[0] = 25,
.ocv_table[0] = samsung_ocv_cap_1500mah,
.ocv_table_size[0] = ARRAY_SIZE(samsung_ocv_cap_1500mah),
.vbat2ri_discharging = samsung_vbat2res_discharging_eb425161la,
.vbat2ri_discharging_size = ARRAY_SIZE(samsung_vbat2res_discharging_eb425161la),
.vbat2ri_charging = samsung_vbat2res_charging_eb425161la,
.vbat2ri_charging_size = ARRAY_SIZE(samsung_vbat2res_charging_eb425161la),
.bti_resistance_ohm = 2400,
.bti_resistance_tolerance = 40,
},
},
{
/*
* Used in Samsung GT-I8160 "Codina"
* Data from vendor boardfile board-codina-[bm|battery].c
*/
.compatible = "samsung,eb425161lu",
.name = "EB425161LU",
.info = {
.charge_full_design_uah = 1500000,
.technology = POWER_SUPPLY_TECHNOLOGY_LION,
.factory_internal_resistance_uohm = 100000,
.factory_internal_resistance_charging_uohm = 200000,
/* If you have data on this fix the min_design_uv */
.voltage_min_design_uv = 3320000,
.voltage_max_design_uv = 4350000,
.overvoltage_limit_uv = 4500000,
.constant_charge_current_max_ua = 900000,
.constant_charge_voltage_max_uv = 4340000,
.charge_term_current_ua = 200000,
.charge_restart_voltage_uv = 4280000,
.maintenance_charge = samsung_maint_charge_table,
.maintenance_charge_size = ARRAY_SIZE(samsung_maint_charge_table),
.alert_low_temp_charge_current_ua = 300000,
.alert_low_temp_charge_voltage_uv = 4000000,
.alert_high_temp_charge_current_ua = 300000,
.alert_high_temp_charge_voltage_uv = 4000000,
.temp_min = -50,
.temp_alert_min = 0,
.temp_alert_max = 43,
.temp_max = 49,
.resist_table = samsung_temp2res,
.resist_table_size = ARRAY_SIZE(samsung_temp2res),
/* If you have tables for more temperatures, add them */
.ocv_temp[0] = 25,
.ocv_table[0] = samsung_ocv_cap_1500mah,
.ocv_table_size[0] = ARRAY_SIZE(samsung_ocv_cap_1500mah),
.vbat2ri_discharging = samsung_vbat2res_discharging_eb425161lu,
.vbat2ri_discharging_size = ARRAY_SIZE(samsung_vbat2res_discharging_eb425161lu),
.vbat2ri_charging = samsung_vbat2res_charging_eb425161lu,
.vbat2ri_charging_size = ARRAY_SIZE(samsung_vbat2res_charging_eb425161lu),
.bti_resistance_ohm = 2400,
.bti_resistance_tolerance = 40,
},
},
{
/*
* Used in Samsung GT-S7710 "Skomer"
* Data from vendor boardfile board-skomer-[bm|battery].c
*/
.compatible = "samsung,eb485159lu",
.name = "EB485159LU",
.info = {
.charge_full_design_uah = 1700000,
.technology = POWER_SUPPLY_TECHNOLOGY_LION,
.factory_internal_resistance_uohm = 100000,
.factory_internal_resistance_charging_uohm = 200000,
.voltage_min_design_uv = 3320000,
.voltage_max_design_uv = 4350000,
.overvoltage_limit_uv = 4500000,
.constant_charge_current_max_ua = 900000,
.constant_charge_voltage_max_uv = 4340000,
.charge_term_current_ua = 200000,
.charge_restart_voltage_uv = 4300000,
.maintenance_charge = samsung_maint_charge_table,
.maintenance_charge_size = ARRAY_SIZE(samsung_maint_charge_table),
.alert_low_temp_charge_current_ua = 300000,
.alert_low_temp_charge_voltage_uv = 4000000,
.alert_high_temp_charge_current_ua = 300000,
.alert_high_temp_charge_voltage_uv = 4000000,
.temp_min = -50,
.temp_alert_min = 0,
.temp_alert_max = 40,
.temp_max = 60,
.resist_table = samsung_temp2res,
.resist_table_size = ARRAY_SIZE(samsung_temp2res),
/* If you have tables for more temperatures, add them */
.ocv_temp[0] = 25,
.ocv_table[0] = samsung_ocv_cap_eb485159lu,
.ocv_table_size[0] = ARRAY_SIZE(samsung_ocv_cap_eb485159lu),
/* CHECKME: vendor uses the 1500 mAh table, check against datasheet */
.vbat2ri_discharging = samsung_vbat2res_discharging_eb485159lu,
.vbat2ri_discharging_size = ARRAY_SIZE(samsung_vbat2res_discharging_eb485159lu),
.vbat2ri_charging = samsung_vbat2res_charging_eb485159lu,
.vbat2ri_charging_size = ARRAY_SIZE(samsung_vbat2res_charging_eb485159lu),
.bti_resistance_ohm = 2400,
.bti_resistance_tolerance = 40,
},
},
{
/*
* Used in Samsung GT-I9070 "Janice"
* Data from vendor boardfile board-janice-bm.c
*/
.compatible = "samsung,eb535151vu",
.name = "EB535151VU",
.info = {
.charge_full_design_uah = 1500000,
.technology = POWER_SUPPLY_TECHNOLOGY_LION,
.factory_internal_resistance_uohm = 100000,
.factory_internal_resistance_charging_uohm = 200000,
/* If you have data on this fix the min_design_uv */
.voltage_min_design_uv = 3300000,
.voltage_max_design_uv = 4180000,
.overvoltage_limit_uv = 4500000,
.constant_charge_current_max_ua = 900000,
.constant_charge_voltage_max_uv = 4200000,
.charge_term_current_ua = 200000,
.charge_restart_voltage_uv = 4170000,
.maintenance_charge = samsung_maint_charge_table,
.maintenance_charge_size = ARRAY_SIZE(samsung_maint_charge_table),
.alert_low_temp_charge_current_ua = 300000,
.alert_low_temp_charge_voltage_uv = 4000000,
.alert_high_temp_charge_current_ua = 300000,
.alert_high_temp_charge_voltage_uv = 4000000,
.temp_min = -5,
.temp_alert_min = 0,
.temp_alert_max = 40,
.temp_max = 60,
.resist_table = samsung_temp2res,
.resist_table_size = ARRAY_SIZE(samsung_temp2res),
/* If you have tables for more temperatures, add them */
.ocv_temp[0] = 25,
.ocv_table[0] = samsung_ocv_cap_eb535151vu,
.ocv_table_size[0] = ARRAY_SIZE(samsung_ocv_cap_eb535151vu),
.vbat2ri_discharging = samsung_vbat2res_discharging_eb535151vu,
.vbat2ri_discharging_size = ARRAY_SIZE(samsung_vbat2res_discharging_eb535151vu),
.vbat2ri_charging = samsung_vbat2res_charging_eb535151vu,
.vbat2ri_charging_size = ARRAY_SIZE(samsung_vbat2res_charging_eb535151vu),
.bti_resistance_ohm = 1500,
.bti_resistance_tolerance = 40,
},
},
{
/*
* Used in Samsung GT-I8530 "Gavini"
* Data from vendor boardfile board-gavini-bm.c
*/
.compatible = "samsung,eb585157lu",
.name = "EB585157LU",
.info = {
.charge_full_design_uah = 2000000,
.technology = POWER_SUPPLY_TECHNOLOGY_LION,
.factory_internal_resistance_uohm = 105000,
.factory_internal_resistance_charging_uohm = 160000,
/* If you have data on this fix the min_design_uv */
.voltage_min_design_uv = 3300000,
.voltage_max_design_uv = 4320000,
.overvoltage_limit_uv = 4500000,
.constant_charge_current_max_ua = 1500000,
.constant_charge_voltage_max_uv = 4350000,
.charge_term_current_ua = 120000,
.charge_restart_voltage_uv = 4300000,
.maintenance_charge = samsung_maint_charge_table,
.maintenance_charge_size = ARRAY_SIZE(samsung_maint_charge_table),
.alert_low_temp_charge_current_ua = 300000,
.alert_low_temp_charge_voltage_uv = 4000000,
.alert_high_temp_charge_current_ua = 300000,
.alert_high_temp_charge_voltage_uv = 4000000,
.temp_min = -5,
.temp_alert_min = 0,
.temp_alert_max = 40,
.temp_max = 60,
.resist_table = samsung_temp2res,
.resist_table_size = ARRAY_SIZE(samsung_temp2res),
/* If you have tables for more temperatures, add them */
.ocv_temp[0] = 25,
.ocv_table[0] = samsung_ocv_cap_eb585157lu,
.ocv_table_size[0] = ARRAY_SIZE(samsung_ocv_cap_eb585157lu),
.vbat2ri_discharging = samsung_vbat2res_discharging_eb585157lu,
.vbat2ri_discharging_size = ARRAY_SIZE(samsung_vbat2res_discharging_eb585157lu),
.vbat2ri_charging = samsung_vbat2res_charging_eb585157lu,
.vbat2ri_charging_size = ARRAY_SIZE(samsung_vbat2res_charging_eb585157lu),
.bti_resistance_ohm = 2400,
.bti_resistance_tolerance = 40,
},
},
};
int samsung_sdi_battery_get_info(struct device *dev,
const char *compatible,
struct power_supply_battery_info **info)
{
struct samsung_sdi_battery *batt;
int i;
for (i = 0; i < ARRAY_SIZE(samsung_sdi_batteries); i++) {
batt = &samsung_sdi_batteries[i];
if (!strcmp(compatible, batt->compatible))
break;
}
if (i == ARRAY_SIZE(samsung_sdi_batteries))
return -ENODEV;
*info = &batt->info;
dev_info(dev, "Samsung SDI %s battery %d mAh\n",
batt->name, batt->info.charge_full_design_uah / 1000);
return 0;
}
EXPORT_SYMBOL_GPL(samsung_sdi_battery_get_info);
| linux-master | drivers/power/supply/samsung-sdi-battery.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* I2C client/driver for the Maxim/Dallas DS2782 Stand-Alone Fuel Gauge IC
*
* Copyright (C) 2009 Bluewater Systems Ltd
*
* Author: Ryan Mallon
*
* DS2786 added by Yulia Vilensky <[email protected]>
*
* UEvent sending added by Evgeny Romanov <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/swab.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/idr.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
#include <linux/ds2782_battery.h>
#define DS2782_REG_RARC 0x06 /* Remaining active relative capacity */
#define DS278x_REG_VOLT_MSB 0x0c
#define DS278x_REG_TEMP_MSB 0x0a
#define DS278x_REG_CURRENT_MSB 0x0e
/* EEPROM Block */
#define DS2782_REG_RSNSP 0x69 /* Sense resistor value */
/* Current unit measurement in uA for a 1 milli-ohm sense resistor */
#define DS2782_CURRENT_UNITS 1563
#define DS2786_REG_RARC 0x02 /* Remaining active relative capacity */
#define DS2786_CURRENT_UNITS 25
#define DS278x_DELAY 1000
struct ds278x_info;
struct ds278x_battery_ops {
int (*get_battery_current)(struct ds278x_info *info, int *current_uA);
int (*get_battery_voltage)(struct ds278x_info *info, int *voltage_uV);
int (*get_battery_capacity)(struct ds278x_info *info, int *capacity);
};
#define to_ds278x_info(x) power_supply_get_drvdata(x)
struct ds278x_info {
struct i2c_client *client;
struct power_supply *battery;
struct power_supply_desc battery_desc;
const struct ds278x_battery_ops *ops;
struct delayed_work bat_work;
int id;
int rsns;
int capacity;
int status; /* State Of Charge */
};
static DEFINE_IDR(battery_id);
static DEFINE_MUTEX(battery_lock);
static inline int ds278x_read_reg(struct ds278x_info *info, int reg, u8 *val)
{
int ret;
ret = i2c_smbus_read_byte_data(info->client, reg);
if (ret < 0) {
dev_err(&info->client->dev, "register read failed\n");
return ret;
}
*val = ret;
return 0;
}
static inline int ds278x_read_reg16(struct ds278x_info *info, int reg_msb,
s16 *val)
{
int ret;
ret = i2c_smbus_read_word_data(info->client, reg_msb);
if (ret < 0) {
dev_err(&info->client->dev, "register read failed\n");
return ret;
}
*val = swab16(ret);
return 0;
}
static int ds278x_get_temp(struct ds278x_info *info, int *temp)
{
s16 raw;
int err;
/*
* Temperature is measured in units of 0.125 degrees celcius, the
* power_supply class measures temperature in tenths of degrees
* celsius. The temperature value is stored as a 10 bit number, plus
* sign in the upper bits of a 16 bit register.
*/
err = ds278x_read_reg16(info, DS278x_REG_TEMP_MSB, &raw);
if (err)
return err;
*temp = ((raw / 32) * 125) / 100;
return 0;
}
static int ds2782_get_current(struct ds278x_info *info, int *current_uA)
{
int sense_res;
int err;
u8 sense_res_raw;
s16 raw;
/*
* The units of measurement for current are dependent on the value of
* the sense resistor.
*/
err = ds278x_read_reg(info, DS2782_REG_RSNSP, &sense_res_raw);
if (err)
return err;
if (sense_res_raw == 0) {
dev_err(&info->client->dev, "sense resistor value is 0\n");
return -ENXIO;
}
sense_res = 1000 / sense_res_raw;
dev_dbg(&info->client->dev, "sense resistor = %d milli-ohms\n",
sense_res);
err = ds278x_read_reg16(info, DS278x_REG_CURRENT_MSB, &raw);
if (err)
return err;
*current_uA = raw * (DS2782_CURRENT_UNITS / sense_res);
return 0;
}
static int ds2782_get_voltage(struct ds278x_info *info, int *voltage_uV)
{
s16 raw;
int err;
/*
* Voltage is measured in units of 4.88mV. The voltage is stored as
* a 10-bit number plus sign, in the upper bits of a 16-bit register
*/
err = ds278x_read_reg16(info, DS278x_REG_VOLT_MSB, &raw);
if (err)
return err;
*voltage_uV = (raw / 32) * 4800;
return 0;
}
static int ds2782_get_capacity(struct ds278x_info *info, int *capacity)
{
int err;
u8 raw;
err = ds278x_read_reg(info, DS2782_REG_RARC, &raw);
if (err)
return err;
*capacity = raw;
return 0;
}
static int ds2786_get_current(struct ds278x_info *info, int *current_uA)
{
int err;
s16 raw;
err = ds278x_read_reg16(info, DS278x_REG_CURRENT_MSB, &raw);
if (err)
return err;
*current_uA = (raw / 16) * (DS2786_CURRENT_UNITS / info->rsns);
return 0;
}
static int ds2786_get_voltage(struct ds278x_info *info, int *voltage_uV)
{
s16 raw;
int err;
/*
* Voltage is measured in units of 1.22mV. The voltage is stored as
* a 12-bit number plus sign, in the upper bits of a 16-bit register
*/
err = ds278x_read_reg16(info, DS278x_REG_VOLT_MSB, &raw);
if (err)
return err;
*voltage_uV = (raw / 8) * 1220;
return 0;
}
static int ds2786_get_capacity(struct ds278x_info *info, int *capacity)
{
int err;
u8 raw;
err = ds278x_read_reg(info, DS2786_REG_RARC, &raw);
if (err)
return err;
/* Relative capacity is displayed with resolution 0.5 % */
*capacity = raw/2 ;
return 0;
}
static int ds278x_get_status(struct ds278x_info *info, int *status)
{
int err;
int current_uA;
int capacity;
err = info->ops->get_battery_current(info, ¤t_uA);
if (err)
return err;
err = info->ops->get_battery_capacity(info, &capacity);
if (err)
return err;
info->capacity = capacity;
if (capacity == 100)
*status = POWER_SUPPLY_STATUS_FULL;
else if (current_uA == 0)
*status = POWER_SUPPLY_STATUS_NOT_CHARGING;
else if (current_uA < 0)
*status = POWER_SUPPLY_STATUS_DISCHARGING;
else
*status = POWER_SUPPLY_STATUS_CHARGING;
return 0;
}
static int ds278x_battery_get_property(struct power_supply *psy,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct ds278x_info *info = to_ds278x_info(psy);
int ret;
switch (prop) {
case POWER_SUPPLY_PROP_STATUS:
ret = ds278x_get_status(info, &val->intval);
break;
case POWER_SUPPLY_PROP_CAPACITY:
ret = info->ops->get_battery_capacity(info, &val->intval);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = info->ops->get_battery_voltage(info, &val->intval);
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = info->ops->get_battery_current(info, &val->intval);
break;
case POWER_SUPPLY_PROP_TEMP:
ret = ds278x_get_temp(info, &val->intval);
break;
default:
ret = -EINVAL;
}
return ret;
}
static void ds278x_bat_update(struct ds278x_info *info)
{
int old_status = info->status;
int old_capacity = info->capacity;
ds278x_get_status(info, &info->status);
if ((old_status != info->status) || (old_capacity != info->capacity))
power_supply_changed(info->battery);
}
static void ds278x_bat_work(struct work_struct *work)
{
struct ds278x_info *info;
info = container_of(work, struct ds278x_info, bat_work.work);
ds278x_bat_update(info);
schedule_delayed_work(&info->bat_work, DS278x_DELAY);
}
static enum power_supply_property ds278x_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_TEMP,
};
static void ds278x_power_supply_init(struct power_supply_desc *battery)
{
battery->type = POWER_SUPPLY_TYPE_BATTERY;
battery->properties = ds278x_battery_props;
battery->num_properties = ARRAY_SIZE(ds278x_battery_props);
battery->get_property = ds278x_battery_get_property;
battery->external_power_changed = NULL;
}
static void ds278x_battery_remove(struct i2c_client *client)
{
struct ds278x_info *info = i2c_get_clientdata(client);
int id = info->id;
power_supply_unregister(info->battery);
cancel_delayed_work_sync(&info->bat_work);
kfree(info->battery_desc.name);
kfree(info);
mutex_lock(&battery_lock);
idr_remove(&battery_id, id);
mutex_unlock(&battery_lock);
}
#ifdef CONFIG_PM_SLEEP
static int ds278x_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ds278x_info *info = i2c_get_clientdata(client);
cancel_delayed_work(&info->bat_work);
return 0;
}
static int ds278x_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ds278x_info *info = i2c_get_clientdata(client);
schedule_delayed_work(&info->bat_work, DS278x_DELAY);
return 0;
}
#endif /* CONFIG_PM_SLEEP */
static SIMPLE_DEV_PM_OPS(ds278x_battery_pm_ops, ds278x_suspend, ds278x_resume);
enum ds278x_num_id {
DS2782 = 0,
DS2786,
};
static const struct ds278x_battery_ops ds278x_ops[] = {
[DS2782] = {
.get_battery_current = ds2782_get_current,
.get_battery_voltage = ds2782_get_voltage,
.get_battery_capacity = ds2782_get_capacity,
},
[DS2786] = {
.get_battery_current = ds2786_get_current,
.get_battery_voltage = ds2786_get_voltage,
.get_battery_capacity = ds2786_get_capacity,
}
};
static int ds278x_battery_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct ds278x_platform_data *pdata = client->dev.platform_data;
struct power_supply_config psy_cfg = {};
struct ds278x_info *info;
int ret;
int num;
/*
* ds2786 should have the sense resistor value set
* in the platform data
*/
if (id->driver_data == DS2786 && !pdata) {
dev_err(&client->dev, "missing platform data for ds2786\n");
return -EINVAL;
}
/* Get an ID for this battery */
mutex_lock(&battery_lock);
ret = idr_alloc(&battery_id, client, 0, 0, GFP_KERNEL);
mutex_unlock(&battery_lock);
if (ret < 0)
goto fail_id;
num = ret;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info) {
ret = -ENOMEM;
goto fail_info;
}
info->battery_desc.name = kasprintf(GFP_KERNEL, "%s-%d",
client->name, num);
if (!info->battery_desc.name) {
ret = -ENOMEM;
goto fail_name;
}
if (id->driver_data == DS2786)
info->rsns = pdata->rsns;
i2c_set_clientdata(client, info);
info->client = client;
info->id = num;
info->ops = &ds278x_ops[id->driver_data];
ds278x_power_supply_init(&info->battery_desc);
psy_cfg.drv_data = info;
info->capacity = 100;
info->status = POWER_SUPPLY_STATUS_FULL;
INIT_DELAYED_WORK(&info->bat_work, ds278x_bat_work);
info->battery = power_supply_register(&client->dev,
&info->battery_desc, &psy_cfg);
if (IS_ERR(info->battery)) {
dev_err(&client->dev, "failed to register battery\n");
ret = PTR_ERR(info->battery);
goto fail_register;
} else {
schedule_delayed_work(&info->bat_work, DS278x_DELAY);
}
return 0;
fail_register:
kfree(info->battery_desc.name);
fail_name:
kfree(info);
fail_info:
mutex_lock(&battery_lock);
idr_remove(&battery_id, num);
mutex_unlock(&battery_lock);
fail_id:
return ret;
}
static const struct i2c_device_id ds278x_id[] = {
{"ds2782", DS2782},
{"ds2786", DS2786},
{},
};
MODULE_DEVICE_TABLE(i2c, ds278x_id);
static struct i2c_driver ds278x_battery_driver = {
.driver = {
.name = "ds2782-battery",
.pm = &ds278x_battery_pm_ops,
},
.probe = ds278x_battery_probe,
.remove = ds278x_battery_remove,
.id_table = ds278x_id,
};
module_i2c_driver(ds278x_battery_driver);
MODULE_AUTHOR("Ryan Mallon");
MODULE_DESCRIPTION("Maxim/Dallas DS2782 Stand-Alone Fuel Gauge IC driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/ds2782_battery.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Battery charger driver for RT5033
*
* Copyright (C) 2014 Samsung Electronics, Co., Ltd.
* Author: Beomho Seo <[email protected]>
*/
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/mfd/rt5033-private.h>
struct rt5033_charger_data {
unsigned int pre_uamp;
unsigned int pre_uvolt;
unsigned int const_uvolt;
unsigned int eoc_uamp;
unsigned int fast_uamp;
};
struct rt5033_charger {
struct device *dev;
struct regmap *regmap;
struct power_supply *psy;
struct rt5033_charger_data *chg;
};
static int rt5033_get_charger_state(struct rt5033_charger *charger)
{
struct regmap *regmap = charger->regmap;
unsigned int reg_data;
int state;
if (!regmap)
return POWER_SUPPLY_STATUS_UNKNOWN;
regmap_read(regmap, RT5033_REG_CHG_STAT, ®_data);
switch (reg_data & RT5033_CHG_STAT_MASK) {
case RT5033_CHG_STAT_DISCHARGING:
state = POWER_SUPPLY_STATUS_DISCHARGING;
break;
case RT5033_CHG_STAT_CHARGING:
state = POWER_SUPPLY_STATUS_CHARGING;
break;
case RT5033_CHG_STAT_FULL:
state = POWER_SUPPLY_STATUS_FULL;
break;
case RT5033_CHG_STAT_NOT_CHARGING:
state = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
default:
state = POWER_SUPPLY_STATUS_UNKNOWN;
}
return state;
}
static int rt5033_get_charger_type(struct rt5033_charger *charger)
{
struct regmap *regmap = charger->regmap;
unsigned int reg_data;
int state;
regmap_read(regmap, RT5033_REG_CHG_STAT, ®_data);
switch (reg_data & RT5033_CHG_STAT_TYPE_MASK) {
case RT5033_CHG_STAT_TYPE_FAST:
state = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
case RT5033_CHG_STAT_TYPE_PRE:
state = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
default:
state = POWER_SUPPLY_CHARGE_TYPE_NONE;
}
return state;
}
static int rt5033_get_charger_current_limit(struct rt5033_charger *charger)
{
struct regmap *regmap = charger->regmap;
unsigned int state, reg_data, data;
regmap_read(regmap, RT5033_REG_CHG_CTRL5, ®_data);
state = (reg_data & RT5033_CHGCTRL5_ICHG_MASK)
>> RT5033_CHGCTRL5_ICHG_SHIFT;
data = RT5033_CHARGER_FAST_CURRENT_MIN +
RT5033_CHARGER_FAST_CURRENT_STEP_NUM * state;
return data;
}
static int rt5033_get_charger_const_voltage(struct rt5033_charger *charger)
{
struct regmap *regmap = charger->regmap;
unsigned int state, reg_data, data;
regmap_read(regmap, RT5033_REG_CHG_CTRL2, ®_data);
state = (reg_data & RT5033_CHGCTRL2_CV_MASK)
>> RT5033_CHGCTRL2_CV_SHIFT;
data = RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MIN +
RT5033_CHARGER_CONST_VOLTAGE_STEP_NUM * state;
return data;
}
static inline int rt5033_init_const_charge(struct rt5033_charger *charger)
{
struct rt5033_charger_data *chg = charger->chg;
int ret;
unsigned int val;
u8 reg_data;
/* Set constant voltage mode */
if (chg->const_uvolt < RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MIN ||
chg->const_uvolt > RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MAX) {
dev_err(charger->dev,
"Value 'constant-charge-voltage-max-microvolt' out of range\n");
return -EINVAL;
}
if (chg->const_uvolt == RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MIN)
reg_data = 0x00;
else if (chg->const_uvolt == RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MAX)
reg_data = RT5033_CV_MAX_VOLTAGE;
else {
val = chg->const_uvolt;
val -= RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MIN;
val /= RT5033_CHARGER_CONST_VOLTAGE_STEP_NUM;
reg_data = val;
}
ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL2,
RT5033_CHGCTRL2_CV_MASK,
reg_data << RT5033_CHGCTRL2_CV_SHIFT);
if (ret) {
dev_err(charger->dev, "Failed regmap update\n");
return -EINVAL;
}
/* Set end of charge current */
if (chg->eoc_uamp < RT5033_CHARGER_EOC_MIN ||
chg->eoc_uamp > RT5033_CHARGER_EOC_MAX) {
dev_err(charger->dev,
"Value 'charge-term-current-microamp' out of range\n");
return -EINVAL;
}
if (chg->eoc_uamp == RT5033_CHARGER_EOC_MIN)
reg_data = 0x01;
else if (chg->eoc_uamp == RT5033_CHARGER_EOC_MAX)
reg_data = 0x07;
else {
val = chg->eoc_uamp;
if (val < RT5033_CHARGER_EOC_REF) {
val -= RT5033_CHARGER_EOC_MIN;
val /= RT5033_CHARGER_EOC_STEP_NUM1;
reg_data = 0x01 + val;
} else if (val > RT5033_CHARGER_EOC_REF) {
val -= RT5033_CHARGER_EOC_REF;
val /= RT5033_CHARGER_EOC_STEP_NUM2;
reg_data = 0x04 + val;
} else {
reg_data = 0x04;
}
}
ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL4,
RT5033_CHGCTRL4_EOC_MASK, reg_data);
if (ret) {
dev_err(charger->dev, "Failed regmap update\n");
return -EINVAL;
}
return 0;
}
static inline int rt5033_init_fast_charge(struct rt5033_charger *charger)
{
struct rt5033_charger_data *chg = charger->chg;
int ret;
unsigned int val;
u8 reg_data;
/* Set limit input current */
ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL1,
RT5033_CHGCTRL1_IAICR_MASK, RT5033_AICR_2000_MODE);
if (ret) {
dev_err(charger->dev, "Failed regmap update\n");
return -EINVAL;
}
/* Set fast-charge mode charging current */
if (chg->fast_uamp < RT5033_CHARGER_FAST_CURRENT_MIN ||
chg->fast_uamp > RT5033_CHARGER_FAST_CURRENT_MAX) {
dev_err(charger->dev,
"Value 'constant-charge-current-max-microamp' out of range\n");
return -EINVAL;
}
if (chg->fast_uamp == RT5033_CHARGER_FAST_CURRENT_MIN)
reg_data = 0x00;
else if (chg->fast_uamp == RT5033_CHARGER_FAST_CURRENT_MAX)
reg_data = RT5033_CHG_MAX_CURRENT;
else {
val = chg->fast_uamp;
val -= RT5033_CHARGER_FAST_CURRENT_MIN;
val /= RT5033_CHARGER_FAST_CURRENT_STEP_NUM;
reg_data = val;
}
ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL5,
RT5033_CHGCTRL5_ICHG_MASK,
reg_data << RT5033_CHGCTRL5_ICHG_SHIFT);
if (ret) {
dev_err(charger->dev, "Failed regmap update\n");
return -EINVAL;
}
return 0;
}
static inline int rt5033_init_pre_charge(struct rt5033_charger *charger)
{
struct rt5033_charger_data *chg = charger->chg;
int ret;
unsigned int val;
u8 reg_data;
/* Set pre-charge threshold voltage */
if (chg->pre_uvolt < RT5033_CHARGER_PRE_THRESHOLD_LIMIT_MIN ||
chg->pre_uvolt > RT5033_CHARGER_PRE_THRESHOLD_LIMIT_MAX) {
dev_err(charger->dev,
"Value 'precharge-upper-limit-microvolt' out of range\n");
return -EINVAL;
}
if (chg->pre_uvolt == RT5033_CHARGER_PRE_THRESHOLD_LIMIT_MIN)
reg_data = 0x00;
else if (chg->pre_uvolt == RT5033_CHARGER_PRE_THRESHOLD_LIMIT_MAX)
reg_data = 0x0f;
else {
val = chg->pre_uvolt;
val -= RT5033_CHARGER_PRE_THRESHOLD_LIMIT_MIN;
val /= RT5033_CHARGER_PRE_THRESHOLD_STEP_NUM;
reg_data = val;
}
ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL5,
RT5033_CHGCTRL5_VPREC_MASK, reg_data);
if (ret) {
dev_err(charger->dev, "Failed regmap update\n");
return -EINVAL;
}
/* Set pre-charge mode charging current */
if (chg->pre_uamp < RT5033_CHARGER_PRE_CURRENT_LIMIT_MIN ||
chg->pre_uamp > RT5033_CHARGER_PRE_CURRENT_LIMIT_MAX) {
dev_err(charger->dev,
"Value 'precharge-current-microamp' out of range\n");
return -EINVAL;
}
if (chg->pre_uamp == RT5033_CHARGER_PRE_CURRENT_LIMIT_MIN)
reg_data = 0x00;
else if (chg->pre_uamp == RT5033_CHARGER_PRE_CURRENT_LIMIT_MAX)
reg_data = RT5033_CHG_MAX_PRE_CURRENT;
else {
val = chg->pre_uamp;
val -= RT5033_CHARGER_PRE_CURRENT_LIMIT_MIN;
val /= RT5033_CHARGER_PRE_CURRENT_STEP_NUM;
reg_data = val;
}
ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL4,
RT5033_CHGCTRL4_IPREC_MASK,
reg_data << RT5033_CHGCTRL4_IPREC_SHIFT);
if (ret) {
dev_err(charger->dev, "Failed regmap update\n");
return -EINVAL;
}
return 0;
}
static int rt5033_charger_reg_init(struct rt5033_charger *charger)
{
int ret = 0;
/* Enable charging termination */
ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL1,
RT5033_CHGCTRL1_TE_EN_MASK, RT5033_TE_ENABLE);
if (ret) {
dev_err(charger->dev, "Failed to enable charging termination.\n");
return -EINVAL;
}
/*
* Disable minimum input voltage regulation (MIVR), this improves
* the charging performance.
*/
ret = regmap_update_bits(charger->regmap, RT5033_REG_CHG_CTRL4,
RT5033_CHGCTRL4_MIVR_MASK, RT5033_CHARGER_MIVR_DISABLE);
if (ret) {
dev_err(charger->dev, "Failed to disable MIVR.\n");
return -EINVAL;
}
ret = rt5033_init_pre_charge(charger);
if (ret)
return ret;
ret = rt5033_init_fast_charge(charger);
if (ret)
return ret;
ret = rt5033_init_const_charge(charger);
if (ret)
return ret;
return 0;
}
static enum power_supply_property rt5033_charger_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_ONLINE,
};
static int rt5033_charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct rt5033_charger *charger = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
val->intval = rt5033_get_charger_state(charger);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
val->intval = rt5033_get_charger_type(charger);
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
val->intval = rt5033_get_charger_current_limit(charger);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
val->intval = rt5033_get_charger_const_voltage(charger);
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = RT5033_CHARGER_MODEL;
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = RT5033_MANUFACTURER;
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = (rt5033_get_charger_state(charger) ==
POWER_SUPPLY_STATUS_CHARGING);
break;
default:
return -EINVAL;
}
return 0;
}
static struct rt5033_charger_data *rt5033_charger_dt_init(
struct rt5033_charger *charger)
{
struct rt5033_charger_data *chg;
struct power_supply_battery_info *info;
int ret;
chg = devm_kzalloc(charger->dev, sizeof(*chg), GFP_KERNEL);
if (!chg)
return ERR_PTR(-ENOMEM);
ret = power_supply_get_battery_info(charger->psy, &info);
if (ret)
return ERR_PTR(dev_err_probe(charger->dev, -EINVAL,
"missing battery info\n"));
/* Assign data. Validity will be checked in the init functions. */
chg->pre_uamp = info->precharge_current_ua;
chg->fast_uamp = info->constant_charge_current_max_ua;
chg->eoc_uamp = info->charge_term_current_ua;
chg->pre_uvolt = info->precharge_voltage_max_uv;
chg->const_uvolt = info->constant_charge_voltage_max_uv;
return chg;
}
static const struct power_supply_desc rt5033_charger_desc = {
.name = "rt5033-charger",
.type = POWER_SUPPLY_TYPE_USB,
.properties = rt5033_charger_props,
.num_properties = ARRAY_SIZE(rt5033_charger_props),
.get_property = rt5033_charger_get_property,
};
static int rt5033_charger_probe(struct platform_device *pdev)
{
struct rt5033_charger *charger;
struct power_supply_config psy_cfg = {};
int ret;
charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
if (!charger)
return -ENOMEM;
platform_set_drvdata(pdev, charger);
charger->dev = &pdev->dev;
charger->regmap = dev_get_regmap(pdev->dev.parent, NULL);
psy_cfg.of_node = pdev->dev.of_node;
psy_cfg.drv_data = charger;
charger->psy = devm_power_supply_register(&pdev->dev,
&rt5033_charger_desc,
&psy_cfg);
if (IS_ERR(charger->psy))
return dev_err_probe(&pdev->dev, PTR_ERR(charger->psy),
"Failed to register power supply\n");
charger->chg = rt5033_charger_dt_init(charger);
if (IS_ERR_OR_NULL(charger->chg))
return PTR_ERR(charger->chg);
ret = rt5033_charger_reg_init(charger);
if (ret)
return ret;
return 0;
}
static const struct platform_device_id rt5033_charger_id[] = {
{ "rt5033-charger", },
{ }
};
MODULE_DEVICE_TABLE(platform, rt5033_charger_id);
static const struct of_device_id rt5033_charger_of_match[] = {
{ .compatible = "richtek,rt5033-charger", },
{ }
};
MODULE_DEVICE_TABLE(of, rt5033_charger_of_match);
static struct platform_driver rt5033_charger_driver = {
.driver = {
.name = "rt5033-charger",
.of_match_table = rt5033_charger_of_match,
},
.probe = rt5033_charger_probe,
.id_table = rt5033_charger_id,
};
module_platform_driver(rt5033_charger_driver);
MODULE_DESCRIPTION("Richtek RT5033 charger driver");
MODULE_AUTHOR("Beomho Seo <[email protected]>");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/power/supply/rt5033_charger.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Battery driver for One Laptop Per Child board.
*
* Copyright © 2006-2010 David Woodhouse <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/types.h>
#include <linux/err.h>
#include <linux/device.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/jiffies.h>
#include <linux/sched.h>
#include <linux/olpc-ec.h>
#define EC_BAT_VOLTAGE 0x10 /* uint16_t, *9.76/32, mV */
#define EC_BAT_CURRENT 0x11 /* int16_t, *15.625/120, mA */
#define EC_BAT_ACR 0x12 /* int16_t, *6250/15, µAh */
#define EC_BAT_TEMP 0x13 /* uint16_t, *100/256, °C */
#define EC_AMB_TEMP 0x14 /* uint16_t, *100/256, °C */
#define EC_BAT_STATUS 0x15 /* uint8_t, bitmask */
#define EC_BAT_SOC 0x16 /* uint8_t, percentage */
#define EC_BAT_SERIAL 0x17 /* uint8_t[6] */
#define EC_BAT_EEPROM 0x18 /* uint8_t adr as input, uint8_t output */
#define EC_BAT_ERRCODE 0x1f /* uint8_t, bitmask */
#define BAT_STAT_PRESENT 0x01
#define BAT_STAT_FULL 0x02
#define BAT_STAT_LOW 0x04
#define BAT_STAT_DESTROY 0x08
#define BAT_STAT_AC 0x10
#define BAT_STAT_CHARGING 0x20
#define BAT_STAT_DISCHARGING 0x40
#define BAT_STAT_TRICKLE 0x80
#define BAT_ERR_INFOFAIL 0x02
#define BAT_ERR_OVERVOLTAGE 0x04
#define BAT_ERR_OVERTEMP 0x05
#define BAT_ERR_GAUGESTOP 0x06
#define BAT_ERR_OUT_OF_CONTROL 0x07
#define BAT_ERR_ID_FAIL 0x09
#define BAT_ERR_ACR_FAIL 0x10
#define BAT_ADDR_MFR_TYPE 0x5F
struct olpc_battery_data {
struct power_supply *olpc_ac;
struct power_supply *olpc_bat;
char bat_serial[17];
bool new_proto;
bool little_endian;
};
/*********************************************************************
* Power
*********************************************************************/
static int olpc_ac_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
int ret = 0;
uint8_t status;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1);
if (ret)
return ret;
val->intval = !!(status & BAT_STAT_AC);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static enum power_supply_property olpc_ac_props[] = {
POWER_SUPPLY_PROP_ONLINE,
};
static const struct power_supply_desc olpc_ac_desc = {
.name = "olpc_ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = olpc_ac_props,
.num_properties = ARRAY_SIZE(olpc_ac_props),
.get_property = olpc_ac_get_prop,
};
static int olpc_bat_get_status(struct olpc_battery_data *data,
union power_supply_propval *val, uint8_t ec_byte)
{
if (data->new_proto) {
if (ec_byte & (BAT_STAT_CHARGING | BAT_STAT_TRICKLE))
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else if (ec_byte & BAT_STAT_DISCHARGING)
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
else if (ec_byte & BAT_STAT_FULL)
val->intval = POWER_SUPPLY_STATUS_FULL;
else /* er,... */
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
} else {
/* Older EC didn't report charge/discharge bits */
if (!(ec_byte & BAT_STAT_AC)) /* No AC means discharging */
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
else if (ec_byte & BAT_STAT_FULL)
val->intval = POWER_SUPPLY_STATUS_FULL;
else /* Not _necessarily_ true but EC doesn't tell all yet */
val->intval = POWER_SUPPLY_STATUS_CHARGING;
}
return 0;
}
static int olpc_bat_get_health(union power_supply_propval *val)
{
uint8_t ec_byte;
int ret;
ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1);
if (ret)
return ret;
switch (ec_byte) {
case 0:
val->intval = POWER_SUPPLY_HEALTH_GOOD;
break;
case BAT_ERR_OVERTEMP:
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
break;
case BAT_ERR_OVERVOLTAGE:
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
break;
case BAT_ERR_INFOFAIL:
case BAT_ERR_OUT_OF_CONTROL:
case BAT_ERR_ID_FAIL:
case BAT_ERR_ACR_FAIL:
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
break;
default:
/* Eep. We don't know this failure code */
ret = -EIO;
}
return ret;
}
static int olpc_bat_get_mfr(union power_supply_propval *val)
{
uint8_t ec_byte;
int ret;
ec_byte = BAT_ADDR_MFR_TYPE;
ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
if (ret)
return ret;
switch (ec_byte >> 4) {
case 1:
val->strval = "Gold Peak";
break;
case 2:
val->strval = "BYD";
break;
default:
val->strval = "Unknown";
break;
}
return ret;
}
static int olpc_bat_get_tech(union power_supply_propval *val)
{
uint8_t ec_byte;
int ret;
ec_byte = BAT_ADDR_MFR_TYPE;
ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
if (ret)
return ret;
switch (ec_byte & 0xf) {
case 1:
val->intval = POWER_SUPPLY_TECHNOLOGY_NiMH;
break;
case 2:
val->intval = POWER_SUPPLY_TECHNOLOGY_LiFe;
break;
default:
val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
break;
}
return ret;
}
static int olpc_bat_get_charge_full_design(union power_supply_propval *val)
{
uint8_t ec_byte;
union power_supply_propval tech;
int ret, mfr;
ret = olpc_bat_get_tech(&tech);
if (ret)
return ret;
ec_byte = BAT_ADDR_MFR_TYPE;
ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
if (ret)
return ret;
mfr = ec_byte >> 4;
switch (tech.intval) {
case POWER_SUPPLY_TECHNOLOGY_NiMH:
switch (mfr) {
case 1: /* Gold Peak */
val->intval = 3000000*.8;
break;
default:
return -EIO;
}
break;
case POWER_SUPPLY_TECHNOLOGY_LiFe:
switch (mfr) {
case 1: /* Gold Peak, fall through */
case 2: /* BYD */
val->intval = 2800000;
break;
default:
return -EIO;
}
break;
default:
return -EIO;
}
return ret;
}
static int olpc_bat_get_charge_now(union power_supply_propval *val)
{
uint8_t soc;
union power_supply_propval full;
int ret;
ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &soc, 1);
if (ret)
return ret;
ret = olpc_bat_get_charge_full_design(&full);
if (ret)
return ret;
val->intval = soc * (full.intval / 100);
return 0;
}
static int olpc_bat_get_voltage_max_design(union power_supply_propval *val)
{
uint8_t ec_byte;
union power_supply_propval tech;
int mfr;
int ret;
ret = olpc_bat_get_tech(&tech);
if (ret)
return ret;
ec_byte = BAT_ADDR_MFR_TYPE;
ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
if (ret)
return ret;
mfr = ec_byte >> 4;
switch (tech.intval) {
case POWER_SUPPLY_TECHNOLOGY_NiMH:
switch (mfr) {
case 1: /* Gold Peak */
val->intval = 6000000;
break;
default:
return -EIO;
}
break;
case POWER_SUPPLY_TECHNOLOGY_LiFe:
switch (mfr) {
case 1: /* Gold Peak */
val->intval = 6400000;
break;
case 2: /* BYD */
val->intval = 6500000;
break;
default:
return -EIO;
}
break;
default:
return -EIO;
}
return ret;
}
static u16 ecword_to_cpu(struct olpc_battery_data *data, u16 ec_word)
{
if (data->little_endian)
return le16_to_cpu((__force __le16)ec_word);
else
return be16_to_cpu((__force __be16)ec_word);
}
/*********************************************************************
* Battery properties
*********************************************************************/
static int olpc_bat_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct olpc_battery_data *data = power_supply_get_drvdata(psy);
int ret = 0;
u16 ec_word;
uint8_t ec_byte;
__be64 ser_buf;
ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &ec_byte, 1);
if (ret)
return ret;
/* Theoretically there's a race here -- the battery could be
removed immediately after we check whether it's present, and
then we query for some other property of the now-absent battery.
It doesn't matter though -- the EC will return the last-known
information, and it's as if we just ran that _little_ bit faster
and managed to read it out before the battery went away. */
if (!(ec_byte & (BAT_STAT_PRESENT | BAT_STAT_TRICKLE)) &&
psp != POWER_SUPPLY_PROP_PRESENT)
return -ENODEV;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
ret = olpc_bat_get_status(data, val, ec_byte);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
if (ec_byte & BAT_STAT_TRICKLE)
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
else if (ec_byte & BAT_STAT_CHARGING)
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
else
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = !!(ec_byte & (BAT_STAT_PRESENT |
BAT_STAT_TRICKLE));
break;
case POWER_SUPPLY_PROP_HEALTH:
if (ec_byte & BAT_STAT_DESTROY)
val->intval = POWER_SUPPLY_HEALTH_DEAD;
else {
ret = olpc_bat_get_health(val);
if (ret)
return ret;
}
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
ret = olpc_bat_get_mfr(val);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
ret = olpc_bat_get_tech(val);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = olpc_ec_cmd(EC_BAT_VOLTAGE, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = ecword_to_cpu(data, ec_word) * 9760L / 32;
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = olpc_ec_cmd(EC_BAT_CURRENT, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = ecword_to_cpu(data, ec_word) * 15625L / 120;
break;
case POWER_SUPPLY_PROP_CAPACITY:
ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &ec_byte, 1);
if (ret)
return ret;
val->intval = ec_byte;
break;
case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
if (ec_byte & BAT_STAT_FULL)
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
else if (ec_byte & BAT_STAT_LOW)
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
else
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
ret = olpc_bat_get_charge_full_design(val);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
ret = olpc_bat_get_charge_now(val);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_TEMP:
ret = olpc_ec_cmd(EC_BAT_TEMP, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = ecword_to_cpu(data, ec_word) * 10 / 256;
break;
case POWER_SUPPLY_PROP_TEMP_AMBIENT:
ret = olpc_ec_cmd(EC_AMB_TEMP, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = (int)ecword_to_cpu(data, ec_word) * 10 / 256;
break;
case POWER_SUPPLY_PROP_CHARGE_COUNTER:
ret = olpc_ec_cmd(EC_BAT_ACR, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = ecword_to_cpu(data, ec_word) * 6250 / 15;
break;
case POWER_SUPPLY_PROP_SERIAL_NUMBER:
ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8);
if (ret)
return ret;
sprintf(data->bat_serial, "%016llx", (long long)be64_to_cpu(ser_buf));
val->strval = data->bat_serial;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
ret = olpc_bat_get_voltage_max_design(val);
if (ret)
return ret;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static enum power_supply_property olpc_xo1_bat_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TEMP_AMBIENT,
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
POWER_SUPPLY_PROP_CHARGE_COUNTER,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
};
/* XO-1.5 does not have ambient temperature property */
static enum power_supply_property olpc_xo15_bat_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
POWER_SUPPLY_PROP_CHARGE_COUNTER,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
};
/* EEPROM reading goes completely around the power_supply API, sadly */
#define EEPROM_START 0x20
#define EEPROM_END 0x80
#define EEPROM_SIZE (EEPROM_END - EEPROM_START)
static ssize_t olpc_bat_eeprom_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf, loff_t off, size_t count)
{
uint8_t ec_byte;
int ret;
int i;
for (i = 0; i < count; i++) {
ec_byte = EEPROM_START + off + i;
ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &buf[i], 1);
if (ret) {
pr_err("olpc-battery: "
"EC_BAT_EEPROM cmd @ 0x%x failed - %d!\n",
ec_byte, ret);
return -EIO;
}
}
return count;
}
static struct bin_attribute olpc_bat_eeprom = {
.attr = {
.name = "eeprom",
.mode = S_IRUGO,
},
.size = EEPROM_SIZE,
.read = olpc_bat_eeprom_read,
};
/* Allow userspace to see the specific error value pulled from the EC */
static ssize_t olpc_bat_error_read(struct device *dev,
struct device_attribute *attr, char *buf)
{
uint8_t ec_byte;
ssize_t ret;
ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1);
if (ret < 0)
return ret;
return sysfs_emit(buf, "%d\n", ec_byte);
}
static struct device_attribute olpc_bat_error = {
.attr = {
.name = "error",
.mode = S_IRUGO,
},
.show = olpc_bat_error_read,
};
static struct attribute *olpc_bat_sysfs_attrs[] = {
&olpc_bat_error.attr,
NULL
};
static struct bin_attribute *olpc_bat_sysfs_bin_attrs[] = {
&olpc_bat_eeprom,
NULL
};
static const struct attribute_group olpc_bat_sysfs_group = {
.attrs = olpc_bat_sysfs_attrs,
.bin_attrs = olpc_bat_sysfs_bin_attrs,
};
static const struct attribute_group *olpc_bat_sysfs_groups[] = {
&olpc_bat_sysfs_group,
NULL
};
/*********************************************************************
* Initialisation
*********************************************************************/
static struct power_supply_desc olpc_bat_desc = {
.name = "olpc_battery",
.get_property = olpc_bat_get_property,
.use_for_apm = 1,
};
static int olpc_battery_suspend(struct platform_device *pdev,
pm_message_t state)
{
struct olpc_battery_data *data = platform_get_drvdata(pdev);
if (device_may_wakeup(&data->olpc_ac->dev))
olpc_ec_wakeup_set(EC_SCI_SRC_ACPWR);
else
olpc_ec_wakeup_clear(EC_SCI_SRC_ACPWR);
if (device_may_wakeup(&data->olpc_bat->dev))
olpc_ec_wakeup_set(EC_SCI_SRC_BATTERY | EC_SCI_SRC_BATSOC
| EC_SCI_SRC_BATERR);
else
olpc_ec_wakeup_clear(EC_SCI_SRC_BATTERY | EC_SCI_SRC_BATSOC
| EC_SCI_SRC_BATERR);
return 0;
}
static int olpc_battery_probe(struct platform_device *pdev)
{
struct power_supply_config bat_psy_cfg = {};
struct power_supply_config ac_psy_cfg = {};
struct olpc_battery_data *data;
struct device_node *np;
uint8_t status;
uint8_t ecver;
int ret;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
platform_set_drvdata(pdev, data);
/* See if the EC is already there and get the EC revision */
ret = olpc_ec_cmd(EC_FIRMWARE_REV, NULL, 0, &ecver, 1);
if (ret)
return ret;
np = of_find_compatible_node(NULL, NULL, "olpc,xo1.75-ec");
if (np) {
of_node_put(np);
/* XO 1.75 */
data->new_proto = true;
data->little_endian = true;
} else if (ecver > 0x44) {
/* XO 1 or 1.5 with a new EC firmware. */
data->new_proto = true;
} else if (ecver < 0x44) {
/*
* We've seen a number of EC protocol changes; this driver
* requires the latest EC protocol, supported by 0x44 and above.
*/
printk(KERN_NOTICE "OLPC EC version 0x%02x too old for "
"battery driver.\n", ecver);
return -ENXIO;
}
ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1);
if (ret)
return ret;
/* Ignore the status. It doesn't actually matter */
ac_psy_cfg.of_node = pdev->dev.of_node;
ac_psy_cfg.drv_data = data;
data->olpc_ac = devm_power_supply_register(&pdev->dev, &olpc_ac_desc,
&ac_psy_cfg);
if (IS_ERR(data->olpc_ac))
return PTR_ERR(data->olpc_ac);
if (of_device_is_compatible(pdev->dev.of_node, "olpc,xo1.5-battery")) {
/* XO-1.5 */
olpc_bat_desc.properties = olpc_xo15_bat_props;
olpc_bat_desc.num_properties = ARRAY_SIZE(olpc_xo15_bat_props);
} else {
/* XO-1 */
olpc_bat_desc.properties = olpc_xo1_bat_props;
olpc_bat_desc.num_properties = ARRAY_SIZE(olpc_xo1_bat_props);
}
bat_psy_cfg.of_node = pdev->dev.of_node;
bat_psy_cfg.drv_data = data;
bat_psy_cfg.attr_grp = olpc_bat_sysfs_groups;
data->olpc_bat = devm_power_supply_register(&pdev->dev, &olpc_bat_desc,
&bat_psy_cfg);
if (IS_ERR(data->olpc_bat))
return PTR_ERR(data->olpc_bat);
if (olpc_ec_wakeup_available()) {
device_set_wakeup_capable(&data->olpc_ac->dev, true);
device_set_wakeup_capable(&data->olpc_bat->dev, true);
}
return 0;
}
static const struct of_device_id olpc_battery_ids[] = {
{ .compatible = "olpc,xo1-battery" },
{ .compatible = "olpc,xo1.5-battery" },
{}
};
MODULE_DEVICE_TABLE(of, olpc_battery_ids);
static struct platform_driver olpc_battery_driver = {
.driver = {
.name = "olpc-battery",
.of_match_table = olpc_battery_ids,
},
.probe = olpc_battery_probe,
.suspend = olpc_battery_suspend,
};
module_platform_driver(olpc_battery_driver);
MODULE_AUTHOR("David Woodhouse <[email protected]>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Battery driver for One Laptop Per Child 'XO' machine");
| linux-master | drivers/power/supply/olpc_battery.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Fuel gauge driver for CellWise 2013 / 2015
*
* Copyright (C) 2012, RockChip
* Copyright (C) 2020, Tobias Schramm
*
* Authors: xuhuicong <[email protected]>
* Authors: Tobias Schramm <[email protected]>
*/
#include <linux/bits.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/gfp.h>
#include <linux/gpio/consumer.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/power_supply.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/time.h>
#include <linux/workqueue.h>
#include <linux/devm-helpers.h>
#define CW2015_SIZE_BATINFO 64
#define CW2015_RESET_TRIES 5
#define CW2015_REG_VERSION 0x00
#define CW2015_REG_VCELL 0x02
#define CW2015_REG_SOC 0x04
#define CW2015_REG_RRT_ALERT 0x06
#define CW2015_REG_CONFIG 0x08
#define CW2015_REG_MODE 0x0A
#define CW2015_REG_BATINFO 0x10
#define CW2015_MODE_SLEEP_MASK GENMASK(7, 6)
#define CW2015_MODE_SLEEP (0x03 << 6)
#define CW2015_MODE_NORMAL (0x00 << 6)
#define CW2015_MODE_QUICK_START (0x03 << 4)
#define CW2015_MODE_RESTART (0x0f << 0)
#define CW2015_CONFIG_UPDATE_FLG (0x01 << 1)
#define CW2015_ATHD(x) ((x) << 3)
#define CW2015_MASK_ATHD GENMASK(7, 3)
#define CW2015_MASK_SOC GENMASK(12, 0)
/* reset gauge of no valid state of charge could be polled for 40s */
#define CW2015_BAT_SOC_ERROR_MS (40 * MSEC_PER_SEC)
/* reset gauge if state of charge stuck for half an hour during charging */
#define CW2015_BAT_CHARGING_STUCK_MS (1800 * MSEC_PER_SEC)
/* poll interval from CellWise GPL Android driver example */
#define CW2015_DEFAULT_POLL_INTERVAL_MS 8000
#define CW2015_AVERAGING_SAMPLES 3
struct cw_battery {
struct device *dev;
struct workqueue_struct *battery_workqueue;
struct delayed_work battery_delay_work;
struct regmap *regmap;
struct power_supply *rk_bat;
struct power_supply_battery_info *battery;
u8 *bat_profile;
bool charger_attached;
bool battery_changed;
int soc;
int voltage_mv;
int status;
int time_to_empty;
int charge_count;
u32 poll_interval_ms;
u8 alert_level;
unsigned int read_errors;
unsigned int charge_stuck_cnt;
};
static int cw_read_word(struct cw_battery *cw_bat, u8 reg, u16 *val)
{
__be16 value;
int ret;
ret = regmap_bulk_read(cw_bat->regmap, reg, &value, sizeof(value));
if (ret)
return ret;
*val = be16_to_cpu(value);
return 0;
}
static int cw_update_profile(struct cw_battery *cw_bat)
{
int ret;
unsigned int reg_val;
u8 reset_val;
/* make sure gauge is not in sleep mode */
ret = regmap_read(cw_bat->regmap, CW2015_REG_MODE, ®_val);
if (ret)
return ret;
reset_val = reg_val;
if ((reg_val & CW2015_MODE_SLEEP_MASK) == CW2015_MODE_SLEEP) {
dev_err(cw_bat->dev,
"Gauge is in sleep mode, can't update battery info\n");
return -EINVAL;
}
/* write new battery info */
ret = regmap_raw_write(cw_bat->regmap, CW2015_REG_BATINFO,
cw_bat->bat_profile,
CW2015_SIZE_BATINFO);
if (ret)
return ret;
/* set config update flag */
reg_val |= CW2015_CONFIG_UPDATE_FLG;
reg_val &= ~CW2015_MASK_ATHD;
reg_val |= CW2015_ATHD(cw_bat->alert_level);
ret = regmap_write(cw_bat->regmap, CW2015_REG_CONFIG, reg_val);
if (ret)
return ret;
/* reset gauge to apply new battery profile */
reset_val &= ~CW2015_MODE_RESTART;
reg_val = reset_val | CW2015_MODE_RESTART;
ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reg_val);
if (ret)
return ret;
/* wait for gauge to reset */
msleep(20);
/* clear reset flag */
ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reset_val);
if (ret)
return ret;
/* wait for gauge to become ready */
ret = regmap_read_poll_timeout(cw_bat->regmap, CW2015_REG_SOC,
reg_val, reg_val <= 100,
10 * USEC_PER_MSEC, 10 * USEC_PER_SEC);
if (ret)
dev_err(cw_bat->dev,
"Gauge did not become ready after profile upload\n");
else
dev_dbg(cw_bat->dev, "Battery profile updated\n");
return ret;
}
static int cw_init(struct cw_battery *cw_bat)
{
int ret;
unsigned int reg_val = CW2015_MODE_SLEEP;
if ((reg_val & CW2015_MODE_SLEEP_MASK) == CW2015_MODE_SLEEP) {
reg_val = CW2015_MODE_NORMAL;
ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reg_val);
if (ret)
return ret;
}
ret = regmap_read(cw_bat->regmap, CW2015_REG_CONFIG, ®_val);
if (ret)
return ret;
if ((reg_val & CW2015_MASK_ATHD) != CW2015_ATHD(cw_bat->alert_level)) {
dev_dbg(cw_bat->dev, "Setting new alert level\n");
reg_val &= ~CW2015_MASK_ATHD;
reg_val |= ~CW2015_ATHD(cw_bat->alert_level);
ret = regmap_write(cw_bat->regmap, CW2015_REG_CONFIG, reg_val);
if (ret)
return ret;
}
ret = regmap_read(cw_bat->regmap, CW2015_REG_CONFIG, ®_val);
if (ret)
return ret;
if (!(reg_val & CW2015_CONFIG_UPDATE_FLG)) {
dev_dbg(cw_bat->dev,
"Battery profile not present, uploading battery profile\n");
if (cw_bat->bat_profile) {
ret = cw_update_profile(cw_bat);
if (ret) {
dev_err(cw_bat->dev,
"Failed to upload battery profile\n");
return ret;
}
} else {
dev_warn(cw_bat->dev,
"No profile specified, continuing without profile\n");
}
} else if (cw_bat->bat_profile) {
u8 bat_info[CW2015_SIZE_BATINFO];
ret = regmap_raw_read(cw_bat->regmap, CW2015_REG_BATINFO,
bat_info, CW2015_SIZE_BATINFO);
if (ret) {
dev_err(cw_bat->dev,
"Failed to read stored battery profile\n");
return ret;
}
if (memcmp(bat_info, cw_bat->bat_profile, CW2015_SIZE_BATINFO)) {
dev_warn(cw_bat->dev, "Replacing stored battery profile\n");
ret = cw_update_profile(cw_bat);
if (ret)
return ret;
}
} else {
dev_warn(cw_bat->dev,
"Can't check current battery profile, no profile provided\n");
}
dev_dbg(cw_bat->dev, "Battery profile configured\n");
return 0;
}
static int cw_power_on_reset(struct cw_battery *cw_bat)
{
int ret;
unsigned char reset_val;
reset_val = CW2015_MODE_SLEEP;
ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reset_val);
if (ret)
return ret;
/* wait for gauge to enter sleep */
msleep(20);
reset_val = CW2015_MODE_NORMAL;
ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reset_val);
if (ret)
return ret;
ret = cw_init(cw_bat);
if (ret)
return ret;
return 0;
}
#define HYSTERESIS(current, previous, up, down) \
(((current) < (previous) + (up)) && ((current) > (previous) - (down)))
static int cw_get_soc(struct cw_battery *cw_bat)
{
unsigned int soc;
int ret;
ret = regmap_read(cw_bat->regmap, CW2015_REG_SOC, &soc);
if (ret)
return ret;
if (soc > 100) {
int max_error_cycles =
CW2015_BAT_SOC_ERROR_MS / cw_bat->poll_interval_ms;
dev_err(cw_bat->dev, "Invalid SoC %d%%\n", soc);
cw_bat->read_errors++;
if (cw_bat->read_errors > max_error_cycles) {
dev_warn(cw_bat->dev,
"Too many invalid SoC reports, resetting gauge\n");
cw_power_on_reset(cw_bat);
cw_bat->read_errors = 0;
}
return cw_bat->soc;
}
cw_bat->read_errors = 0;
/* Reset gauge if stuck while charging */
if (cw_bat->status == POWER_SUPPLY_STATUS_CHARGING && soc == cw_bat->soc) {
int max_stuck_cycles =
CW2015_BAT_CHARGING_STUCK_MS / cw_bat->poll_interval_ms;
cw_bat->charge_stuck_cnt++;
if (cw_bat->charge_stuck_cnt > max_stuck_cycles) {
dev_warn(cw_bat->dev,
"SoC stuck @%u%%, resetting gauge\n", soc);
cw_power_on_reset(cw_bat);
cw_bat->charge_stuck_cnt = 0;
}
} else {
cw_bat->charge_stuck_cnt = 0;
}
/* Ignore voltage dips during charge */
if (cw_bat->charger_attached && HYSTERESIS(soc, cw_bat->soc, 0, 3))
soc = cw_bat->soc;
/* Ignore voltage spikes during discharge */
if (!cw_bat->charger_attached && HYSTERESIS(soc, cw_bat->soc, 3, 0))
soc = cw_bat->soc;
return soc;
}
static int cw_get_voltage(struct cw_battery *cw_bat)
{
int ret, i, voltage_mv;
u16 reg_val;
u32 avg = 0;
for (i = 0; i < CW2015_AVERAGING_SAMPLES; i++) {
ret = cw_read_word(cw_bat, CW2015_REG_VCELL, ®_val);
if (ret)
return ret;
avg += reg_val;
}
avg /= CW2015_AVERAGING_SAMPLES;
/*
* 305 uV per ADC step
* Use 312 / 1024 as efficient approximation of 305 / 1000
* Negligible error of 0.1%
*/
voltage_mv = avg * 312 / 1024;
dev_dbg(cw_bat->dev, "Read voltage: %d mV, raw=0x%04x\n",
voltage_mv, reg_val);
return voltage_mv;
}
static int cw_get_time_to_empty(struct cw_battery *cw_bat)
{
int ret;
u16 value16;
ret = cw_read_word(cw_bat, CW2015_REG_RRT_ALERT, &value16);
if (ret)
return ret;
return value16 & CW2015_MASK_SOC;
}
static void cw_update_charge_status(struct cw_battery *cw_bat)
{
int ret;
ret = power_supply_am_i_supplied(cw_bat->rk_bat);
if (ret < 0) {
dev_warn(cw_bat->dev, "Failed to get supply state: %d\n", ret);
} else {
bool charger_attached;
charger_attached = !!ret;
if (cw_bat->charger_attached != charger_attached) {
cw_bat->battery_changed = true;
if (charger_attached)
cw_bat->charge_count++;
}
cw_bat->charger_attached = charger_attached;
}
}
static void cw_update_soc(struct cw_battery *cw_bat)
{
int soc;
soc = cw_get_soc(cw_bat);
if (soc < 0)
dev_err(cw_bat->dev, "Failed to get SoC from gauge: %d\n", soc);
else if (cw_bat->soc != soc) {
cw_bat->soc = soc;
cw_bat->battery_changed = true;
}
}
static void cw_update_voltage(struct cw_battery *cw_bat)
{
int voltage_mv;
voltage_mv = cw_get_voltage(cw_bat);
if (voltage_mv < 0)
dev_err(cw_bat->dev, "Failed to get voltage from gauge: %d\n",
voltage_mv);
else
cw_bat->voltage_mv = voltage_mv;
}
static void cw_update_status(struct cw_battery *cw_bat)
{
int status = POWER_SUPPLY_STATUS_DISCHARGING;
if (cw_bat->charger_attached) {
if (cw_bat->soc >= 100)
status = POWER_SUPPLY_STATUS_FULL;
else
status = POWER_SUPPLY_STATUS_CHARGING;
}
if (cw_bat->status != status)
cw_bat->battery_changed = true;
cw_bat->status = status;
}
static void cw_update_time_to_empty(struct cw_battery *cw_bat)
{
int time_to_empty;
time_to_empty = cw_get_time_to_empty(cw_bat);
if (time_to_empty < 0)
dev_err(cw_bat->dev, "Failed to get time to empty from gauge: %d\n",
time_to_empty);
else if (cw_bat->time_to_empty != time_to_empty) {
cw_bat->time_to_empty = time_to_empty;
cw_bat->battery_changed = true;
}
}
static void cw_bat_work(struct work_struct *work)
{
struct delayed_work *delay_work;
struct cw_battery *cw_bat;
int ret;
unsigned int reg_val;
delay_work = to_delayed_work(work);
cw_bat = container_of(delay_work, struct cw_battery, battery_delay_work);
ret = regmap_read(cw_bat->regmap, CW2015_REG_MODE, ®_val);
if (ret) {
dev_err(cw_bat->dev, "Failed to read mode from gauge: %d\n", ret);
} else {
if ((reg_val & CW2015_MODE_SLEEP_MASK) == CW2015_MODE_SLEEP) {
int i;
for (i = 0; i < CW2015_RESET_TRIES; i++) {
if (!cw_power_on_reset(cw_bat))
break;
}
}
cw_update_soc(cw_bat);
cw_update_voltage(cw_bat);
cw_update_charge_status(cw_bat);
cw_update_status(cw_bat);
cw_update_time_to_empty(cw_bat);
}
dev_dbg(cw_bat->dev, "charger_attached = %d\n", cw_bat->charger_attached);
dev_dbg(cw_bat->dev, "status = %d\n", cw_bat->status);
dev_dbg(cw_bat->dev, "soc = %d%%\n", cw_bat->soc);
dev_dbg(cw_bat->dev, "voltage = %dmV\n", cw_bat->voltage_mv);
if (cw_bat->battery_changed)
power_supply_changed(cw_bat->rk_bat);
cw_bat->battery_changed = false;
queue_delayed_work(cw_bat->battery_workqueue,
&cw_bat->battery_delay_work,
msecs_to_jiffies(cw_bat->poll_interval_ms));
}
static bool cw_battery_valid_time_to_empty(struct cw_battery *cw_bat)
{
return cw_bat->time_to_empty > 0 &&
cw_bat->time_to_empty < CW2015_MASK_SOC &&
cw_bat->status == POWER_SUPPLY_STATUS_DISCHARGING;
}
static int cw_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct cw_battery *cw_bat;
cw_bat = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = cw_bat->soc;
break;
case POWER_SUPPLY_PROP_STATUS:
val->intval = cw_bat->status;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = !!cw_bat->voltage_mv;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = cw_bat->voltage_mv * 1000;
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
if (cw_battery_valid_time_to_empty(cw_bat))
val->intval = cw_bat->time_to_empty;
else
val->intval = 0;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
break;
case POWER_SUPPLY_PROP_CHARGE_COUNTER:
val->intval = cw_bat->charge_count;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
if (cw_bat->battery->charge_full_design_uah > 0)
val->intval = cw_bat->battery->charge_full_design_uah;
else
val->intval = 0;
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
val->intval = cw_bat->battery->charge_full_design_uah;
val->intval = val->intval * cw_bat->soc / 100;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
if (cw_battery_valid_time_to_empty(cw_bat) &&
cw_bat->battery->charge_full_design_uah > 0) {
/* calculate remaining capacity */
val->intval = cw_bat->battery->charge_full_design_uah;
val->intval = val->intval * cw_bat->soc / 100;
/* estimate current based on time to empty */
val->intval = 60 * val->intval / cw_bat->time_to_empty;
} else {
val->intval = 0;
}
break;
default:
break;
}
return 0;
}
static enum power_supply_property cw_battery_properties[] = {
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_COUNTER,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
static const struct power_supply_desc cw2015_bat_desc = {
.name = "cw2015-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = cw_battery_properties,
.num_properties = ARRAY_SIZE(cw_battery_properties),
.get_property = cw_battery_get_property,
};
static int cw2015_parse_properties(struct cw_battery *cw_bat)
{
struct device *dev = cw_bat->dev;
int length;
int ret;
length = device_property_count_u8(dev, "cellwise,battery-profile");
if (length < 0) {
dev_warn(cw_bat->dev,
"No battery-profile found, using current flash contents\n");
} else if (length != CW2015_SIZE_BATINFO) {
dev_err(cw_bat->dev, "battery-profile must be %d bytes\n",
CW2015_SIZE_BATINFO);
return -EINVAL;
} else {
cw_bat->bat_profile = devm_kzalloc(dev, length, GFP_KERNEL);
if (!cw_bat->bat_profile)
return -ENOMEM;
ret = device_property_read_u8_array(dev,
"cellwise,battery-profile",
cw_bat->bat_profile,
length);
if (ret)
return ret;
}
ret = device_property_read_u32(dev, "cellwise,monitor-interval-ms",
&cw_bat->poll_interval_ms);
if (ret) {
dev_dbg(cw_bat->dev, "Using default poll interval\n");
cw_bat->poll_interval_ms = CW2015_DEFAULT_POLL_INTERVAL_MS;
}
return 0;
}
static const struct regmap_range regmap_ranges_rd_yes[] = {
regmap_reg_range(CW2015_REG_VERSION, CW2015_REG_VERSION),
regmap_reg_range(CW2015_REG_VCELL, CW2015_REG_CONFIG),
regmap_reg_range(CW2015_REG_MODE, CW2015_REG_MODE),
regmap_reg_range(CW2015_REG_BATINFO,
CW2015_REG_BATINFO + CW2015_SIZE_BATINFO - 1),
};
static const struct regmap_access_table regmap_rd_table = {
.yes_ranges = regmap_ranges_rd_yes,
.n_yes_ranges = 4,
};
static const struct regmap_range regmap_ranges_wr_yes[] = {
regmap_reg_range(CW2015_REG_RRT_ALERT, CW2015_REG_CONFIG),
regmap_reg_range(CW2015_REG_MODE, CW2015_REG_MODE),
regmap_reg_range(CW2015_REG_BATINFO,
CW2015_REG_BATINFO + CW2015_SIZE_BATINFO - 1),
};
static const struct regmap_access_table regmap_wr_table = {
.yes_ranges = regmap_ranges_wr_yes,
.n_yes_ranges = 3,
};
static const struct regmap_range regmap_ranges_vol_yes[] = {
regmap_reg_range(CW2015_REG_VCELL, CW2015_REG_SOC + 1),
};
static const struct regmap_access_table regmap_vol_table = {
.yes_ranges = regmap_ranges_vol_yes,
.n_yes_ranges = 1,
};
static const struct regmap_config cw2015_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.rd_table = ®map_rd_table,
.wr_table = ®map_wr_table,
.volatile_table = ®map_vol_table,
.max_register = CW2015_REG_BATINFO + CW2015_SIZE_BATINFO - 1,
};
static int cw_bat_probe(struct i2c_client *client)
{
int ret;
struct cw_battery *cw_bat;
struct power_supply_config psy_cfg = { 0 };
cw_bat = devm_kzalloc(&client->dev, sizeof(*cw_bat), GFP_KERNEL);
if (!cw_bat)
return -ENOMEM;
i2c_set_clientdata(client, cw_bat);
cw_bat->dev = &client->dev;
cw_bat->soc = 1;
ret = cw2015_parse_properties(cw_bat);
if (ret) {
dev_err(cw_bat->dev, "Failed to parse cw2015 properties\n");
return ret;
}
cw_bat->regmap = devm_regmap_init_i2c(client, &cw2015_regmap_config);
if (IS_ERR(cw_bat->regmap)) {
dev_err(cw_bat->dev, "Failed to allocate regmap: %ld\n",
PTR_ERR(cw_bat->regmap));
return PTR_ERR(cw_bat->regmap);
}
ret = cw_init(cw_bat);
if (ret) {
dev_err(cw_bat->dev, "Init failed: %d\n", ret);
return ret;
}
psy_cfg.drv_data = cw_bat;
psy_cfg.fwnode = dev_fwnode(cw_bat->dev);
cw_bat->rk_bat = devm_power_supply_register(&client->dev,
&cw2015_bat_desc,
&psy_cfg);
if (IS_ERR(cw_bat->rk_bat)) {
/* try again if this happens */
dev_err_probe(&client->dev, PTR_ERR(cw_bat->rk_bat),
"Failed to register power supply\n");
return PTR_ERR(cw_bat->rk_bat);
}
ret = power_supply_get_battery_info(cw_bat->rk_bat, &cw_bat->battery);
if (ret) {
/* Allocate an empty battery */
cw_bat->battery = devm_kzalloc(&client->dev,
sizeof(*cw_bat->battery),
GFP_KERNEL);
if (!cw_bat->battery)
return -ENOMEM;
dev_warn(cw_bat->dev,
"No monitored battery, some properties will be missing\n");
}
cw_bat->battery_workqueue = create_singlethread_workqueue("rk_battery");
if (!cw_bat->battery_workqueue)
return -ENOMEM;
devm_delayed_work_autocancel(&client->dev,
&cw_bat->battery_delay_work, cw_bat_work);
queue_delayed_work(cw_bat->battery_workqueue,
&cw_bat->battery_delay_work, msecs_to_jiffies(10));
return 0;
}
static int __maybe_unused cw_bat_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct cw_battery *cw_bat = i2c_get_clientdata(client);
cancel_delayed_work_sync(&cw_bat->battery_delay_work);
return 0;
}
static int __maybe_unused cw_bat_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct cw_battery *cw_bat = i2c_get_clientdata(client);
queue_delayed_work(cw_bat->battery_workqueue,
&cw_bat->battery_delay_work, 0);
return 0;
}
static SIMPLE_DEV_PM_OPS(cw_bat_pm_ops, cw_bat_suspend, cw_bat_resume);
static const struct i2c_device_id cw_bat_id_table[] = {
{ "cw2015", 0 },
{ }
};
static const struct of_device_id cw2015_of_match[] = {
{ .compatible = "cellwise,cw2015" },
{ }
};
MODULE_DEVICE_TABLE(of, cw2015_of_match);
static struct i2c_driver cw_bat_driver = {
.driver = {
.name = "cw2015",
.of_match_table = cw2015_of_match,
.pm = &cw_bat_pm_ops,
},
.probe = cw_bat_probe,
.id_table = cw_bat_id_table,
};
module_i2c_driver(cw_bat_driver);
MODULE_AUTHOR("xhc<[email protected]>");
MODULE_AUTHOR("Tobias Schramm <[email protected]>");
MODULE_DESCRIPTION("cw2015/cw2013 battery driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/cw2015_battery.c |
// SPDX-License-Identifier: GPL-2.0+
/*
* Driver for UCS1002 Programmable USB Port Power Controller
*
* Copyright (C) 2019 Zodiac Inflight Innovations
*/
#include <linux/bits.h>
#include <linux/freezer.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/of_regulator.h>
/* UCS1002 Registers */
#define UCS1002_REG_CURRENT_MEASUREMENT 0x00
/*
* The Total Accumulated Charge registers store the total accumulated
* charge delivered from the VS source to a portable device. The total
* value is calculated using four registers, from 01h to 04h. The bit
* weighting of the registers is given in mA/hrs.
*/
#define UCS1002_REG_TOTAL_ACC_CHARGE 0x01
/* Other Status Register */
#define UCS1002_REG_OTHER_STATUS 0x0f
# define F_ADET_PIN BIT(4)
# define F_CHG_ACT BIT(3)
/* Interrupt Status */
#define UCS1002_REG_INTERRUPT_STATUS 0x10
# define F_ERR BIT(7)
# define F_DISCHARGE_ERR BIT(6)
# define F_RESET BIT(5)
# define F_MIN_KEEP_OUT BIT(4)
# define F_TSD BIT(3)
# define F_OVER_VOLT BIT(2)
# define F_BACK_VOLT BIT(1)
# define F_OVER_ILIM BIT(0)
/* Pin Status Register */
#define UCS1002_REG_PIN_STATUS 0x14
# define UCS1002_PWR_STATE_MASK 0x03
# define F_PWR_EN_PIN BIT(6)
# define F_M2_PIN BIT(5)
# define F_M1_PIN BIT(4)
# define F_EM_EN_PIN BIT(3)
# define F_SEL_PIN BIT(2)
# define F_ACTIVE_MODE_MASK GENMASK(5, 3)
# define F_ACTIVE_MODE_PASSTHROUGH F_M2_PIN
# define F_ACTIVE_MODE_DEDICATED F_EM_EN_PIN
# define F_ACTIVE_MODE_BC12_DCP (F_M2_PIN | F_EM_EN_PIN)
# define F_ACTIVE_MODE_BC12_SDP F_M1_PIN
# define F_ACTIVE_MODE_BC12_CDP (F_M1_PIN | F_M2_PIN | F_EM_EN_PIN)
/* General Configuration Register */
#define UCS1002_REG_GENERAL_CFG 0x15
# define F_RATION_EN BIT(3)
/* Emulation Configuration Register */
#define UCS1002_REG_EMU_CFG 0x16
/* Switch Configuration Register */
#define UCS1002_REG_SWITCH_CFG 0x17
# define F_PIN_IGNORE BIT(7)
# define F_EM_EN_SET BIT(5)
# define F_M2_SET BIT(4)
# define F_M1_SET BIT(3)
# define F_S0_SET BIT(2)
# define F_PWR_EN_SET BIT(1)
# define F_LATCH_SET BIT(0)
# define V_SET_ACTIVE_MODE_MASK GENMASK(5, 3)
# define V_SET_ACTIVE_MODE_PASSTHROUGH F_M2_SET
# define V_SET_ACTIVE_MODE_DEDICATED F_EM_EN_SET
# define V_SET_ACTIVE_MODE_BC12_DCP (F_M2_SET | F_EM_EN_SET)
# define V_SET_ACTIVE_MODE_BC12_SDP F_M1_SET
# define V_SET_ACTIVE_MODE_BC12_CDP (F_M1_SET | F_M2_SET | F_EM_EN_SET)
/* Current Limit Register */
#define UCS1002_REG_ILIMIT 0x19
# define UCS1002_ILIM_SW_MASK GENMASK(3, 0)
/* Product ID */
#define UCS1002_REG_PRODUCT_ID 0xfd
# define UCS1002_PRODUCT_ID 0x4e
/* Manufacture name */
#define UCS1002_MANUFACTURER "SMSC"
struct ucs1002_info {
struct power_supply *charger;
struct i2c_client *client;
struct regmap *regmap;
struct regulator_desc *regulator_descriptor;
struct regulator_dev *rdev;
bool present;
bool output_disable;
struct delayed_work health_poll;
int health;
};
static enum power_supply_property ucs1002_props[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_PRESENT, /* the presence of PED */
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_USB_TYPE,
POWER_SUPPLY_PROP_HEALTH,
};
static int ucs1002_get_online(struct ucs1002_info *info,
union power_supply_propval *val)
{
unsigned int reg;
int ret;
ret = regmap_read(info->regmap, UCS1002_REG_OTHER_STATUS, ®);
if (ret)
return ret;
val->intval = !!(reg & F_CHG_ACT);
return 0;
}
static int ucs1002_get_charge(struct ucs1002_info *info,
union power_supply_propval *val)
{
/*
* To fit within 32 bits some values are rounded (uA/h)
*
* For Total Accumulated Charge Middle Low Byte register, addr
* 03h, byte 2
*
* B0: 0.01084 mA/h rounded to 11 uA/h
* B1: 0.02169 mA/h rounded to 22 uA/h
* B2: 0.04340 mA/h rounded to 43 uA/h
* B3: 0.08676 mA/h rounded to 87 uA/h
* B4: 0.17350 mA/h rounded to 173 uÁ/h
*
* For Total Accumulated Charge Low Byte register, addr 04h,
* byte 3
*
* B6: 0.00271 mA/h rounded to 3 uA/h
* B7: 0.005422 mA/h rounded to 5 uA/h
*/
static const int bit_weights_uAh[BITS_PER_TYPE(u32)] = {
/*
* Bit corresponding to low byte (offset 0x04)
* B0 B1 B2 B3 B4 B5 B6 B7
*/
0, 0, 0, 0, 0, 0, 3, 5,
/*
* Bit corresponding to middle low byte (offset 0x03)
* B0 B1 B2 B3 B4 B5 B6 B7
*/
11, 22, 43, 87, 173, 347, 694, 1388,
/*
* Bit corresponding to middle high byte (offset 0x02)
* B0 B1 B2 B3 B4 B5 B6 B7
*/
2776, 5552, 11105, 22210, 44420, 88840, 177700, 355400,
/*
* Bit corresponding to high byte (offset 0x01)
* B0 B1 B2 B3 B4 B5 B6 B7
*/
710700, 1421000, 2843000, 5685000, 11371000, 22742000,
45484000, 90968000,
};
unsigned long total_acc_charger;
unsigned int reg;
int i, ret;
ret = regmap_bulk_read(info->regmap, UCS1002_REG_TOTAL_ACC_CHARGE,
®, sizeof(u32));
if (ret)
return ret;
total_acc_charger = be32_to_cpu(reg); /* BE as per offsets above */
val->intval = 0;
for_each_set_bit(i, &total_acc_charger, ARRAY_SIZE(bit_weights_uAh))
val->intval += bit_weights_uAh[i];
return 0;
}
static int ucs1002_get_current(struct ucs1002_info *info,
union power_supply_propval *val)
{
/*
* The Current Measurement register stores the measured
* current value delivered to the portable device. The range
* is from 9.76 mA to 2.5 A.
*/
static const int bit_weights_uA[BITS_PER_TYPE(u8)] = {
9760, 19500, 39000, 78100, 156200, 312300, 624600, 1249300,
};
unsigned long current_measurement;
unsigned int reg;
int i, ret;
ret = regmap_read(info->regmap, UCS1002_REG_CURRENT_MEASUREMENT, ®);
if (ret)
return ret;
current_measurement = reg;
val->intval = 0;
for_each_set_bit(i, ¤t_measurement, ARRAY_SIZE(bit_weights_uA))
val->intval += bit_weights_uA[i];
return 0;
}
/*
* The Current Limit register stores the maximum current used by the
* port switch. The range is from 500mA to 2.5 A.
*/
static const u32 ucs1002_current_limit_uA[] = {
500000, 900000, 1000000, 1200000, 1500000, 1800000, 2000000, 2500000,
};
static int ucs1002_get_max_current(struct ucs1002_info *info,
union power_supply_propval *val)
{
unsigned int reg;
int ret;
if (info->output_disable) {
val->intval = 0;
return 0;
}
ret = regmap_read(info->regmap, UCS1002_REG_ILIMIT, ®);
if (ret)
return ret;
val->intval = ucs1002_current_limit_uA[reg & UCS1002_ILIM_SW_MASK];
return 0;
}
static int ucs1002_set_max_current(struct ucs1002_info *info, u32 val)
{
unsigned int reg;
int ret, idx;
if (val == 0) {
info->output_disable = true;
regulator_disable_regmap(info->rdev);
return 0;
}
for (idx = 0; idx < ARRAY_SIZE(ucs1002_current_limit_uA); idx++) {
if (val == ucs1002_current_limit_uA[idx])
break;
}
if (idx == ARRAY_SIZE(ucs1002_current_limit_uA))
return -EINVAL;
ret = regmap_write(info->regmap, UCS1002_REG_ILIMIT, idx);
if (ret)
return ret;
/*
* Any current limit setting exceeding the one set via ILIM
* pin will be rejected, so we read out freshly changed limit
* to make sure that it took effect.
*/
ret = regmap_read(info->regmap, UCS1002_REG_ILIMIT, ®);
if (ret)
return ret;
if (reg != idx)
return -EINVAL;
info->output_disable = false;
if (info->rdev && info->rdev->use_count &&
!regulator_is_enabled_regmap(info->rdev))
regulator_enable_regmap(info->rdev);
return 0;
}
static enum power_supply_usb_type ucs1002_usb_types[] = {
POWER_SUPPLY_USB_TYPE_PD,
POWER_SUPPLY_USB_TYPE_SDP,
POWER_SUPPLY_USB_TYPE_DCP,
POWER_SUPPLY_USB_TYPE_CDP,
POWER_SUPPLY_USB_TYPE_UNKNOWN,
};
static int ucs1002_set_usb_type(struct ucs1002_info *info, int val)
{
unsigned int mode;
if (val < 0 || val >= ARRAY_SIZE(ucs1002_usb_types))
return -EINVAL;
switch (ucs1002_usb_types[val]) {
case POWER_SUPPLY_USB_TYPE_PD:
mode = V_SET_ACTIVE_MODE_DEDICATED;
break;
case POWER_SUPPLY_USB_TYPE_SDP:
mode = V_SET_ACTIVE_MODE_BC12_SDP;
break;
case POWER_SUPPLY_USB_TYPE_DCP:
mode = V_SET_ACTIVE_MODE_BC12_DCP;
break;
case POWER_SUPPLY_USB_TYPE_CDP:
mode = V_SET_ACTIVE_MODE_BC12_CDP;
break;
default:
return -EINVAL;
}
return regmap_update_bits(info->regmap, UCS1002_REG_SWITCH_CFG,
V_SET_ACTIVE_MODE_MASK, mode);
}
static int ucs1002_get_usb_type(struct ucs1002_info *info,
union power_supply_propval *val)
{
enum power_supply_usb_type type;
unsigned int reg;
int ret;
ret = regmap_read(info->regmap, UCS1002_REG_PIN_STATUS, ®);
if (ret)
return ret;
switch (reg & F_ACTIVE_MODE_MASK) {
default:
type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
break;
case F_ACTIVE_MODE_DEDICATED:
type = POWER_SUPPLY_USB_TYPE_PD;
break;
case F_ACTIVE_MODE_BC12_SDP:
type = POWER_SUPPLY_USB_TYPE_SDP;
break;
case F_ACTIVE_MODE_BC12_DCP:
type = POWER_SUPPLY_USB_TYPE_DCP;
break;
case F_ACTIVE_MODE_BC12_CDP:
type = POWER_SUPPLY_USB_TYPE_CDP;
break;
}
val->intval = type;
return 0;
}
static int ucs1002_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct ucs1002_info *info = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
return ucs1002_get_online(info, val);
case POWER_SUPPLY_PROP_CHARGE_NOW:
return ucs1002_get_charge(info, val);
case POWER_SUPPLY_PROP_CURRENT_NOW:
return ucs1002_get_current(info, val);
case POWER_SUPPLY_PROP_CURRENT_MAX:
return ucs1002_get_max_current(info, val);
case POWER_SUPPLY_PROP_USB_TYPE:
return ucs1002_get_usb_type(info, val);
case POWER_SUPPLY_PROP_HEALTH:
return val->intval = info->health;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = info->present;
return 0;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = UCS1002_MANUFACTURER;
return 0;
default:
return -EINVAL;
}
}
static int ucs1002_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct ucs1002_info *info = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_CURRENT_MAX:
return ucs1002_set_max_current(info, val->intval);
case POWER_SUPPLY_PROP_USB_TYPE:
return ucs1002_set_usb_type(info, val->intval);
default:
return -EINVAL;
}
}
static int ucs1002_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_CURRENT_MAX:
case POWER_SUPPLY_PROP_USB_TYPE:
return true;
default:
return false;
}
}
static const struct power_supply_desc ucs1002_charger_desc = {
.name = "ucs1002",
.type = POWER_SUPPLY_TYPE_USB,
.usb_types = ucs1002_usb_types,
.num_usb_types = ARRAY_SIZE(ucs1002_usb_types),
.get_property = ucs1002_get_property,
.set_property = ucs1002_set_property,
.property_is_writeable = ucs1002_property_is_writeable,
.properties = ucs1002_props,
.num_properties = ARRAY_SIZE(ucs1002_props),
};
static void ucs1002_health_poll(struct work_struct *work)
{
struct ucs1002_info *info = container_of(work, struct ucs1002_info,
health_poll.work);
int ret;
u32 reg;
ret = regmap_read(info->regmap, UCS1002_REG_INTERRUPT_STATUS, ®);
if (ret)
return;
/* bad health and no status change, just schedule us again in a while */
if ((reg & F_ERR) && info->health != POWER_SUPPLY_HEALTH_GOOD) {
schedule_delayed_work(&info->health_poll,
msecs_to_jiffies(2000));
return;
}
if (reg & F_TSD)
info->health = POWER_SUPPLY_HEALTH_OVERHEAT;
else if (reg & (F_OVER_VOLT | F_BACK_VOLT))
info->health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
else if (reg & F_OVER_ILIM)
info->health = POWER_SUPPLY_HEALTH_OVERCURRENT;
else if (reg & (F_DISCHARGE_ERR | F_MIN_KEEP_OUT))
info->health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
else
info->health = POWER_SUPPLY_HEALTH_GOOD;
sysfs_notify(&info->charger->dev.kobj, NULL, "health");
}
static irqreturn_t ucs1002_charger_irq(int irq, void *data)
{
int ret, regval;
bool present;
struct ucs1002_info *info = data;
present = info->present;
ret = regmap_read(info->regmap, UCS1002_REG_OTHER_STATUS, ®val);
if (ret)
return IRQ_HANDLED;
/* update attached status */
info->present = regval & F_ADET_PIN;
/* notify the change */
if (present != info->present)
power_supply_changed(info->charger);
return IRQ_HANDLED;
}
static irqreturn_t ucs1002_alert_irq(int irq, void *data)
{
struct ucs1002_info *info = data;
mod_delayed_work(system_wq, &info->health_poll, 0);
return IRQ_HANDLED;
}
static int ucs1002_regulator_enable(struct regulator_dev *rdev)
{
struct ucs1002_info *info = rdev_get_drvdata(rdev);
/*
* If the output is disabled due to 0 maximum current, just pretend the
* enable did work. The regulator will be enabled as soon as we get a
* a non-zero maximum current budget.
*/
if (info->output_disable)
return 0;
return regulator_enable_regmap(rdev);
}
static const struct regulator_ops ucs1002_regulator_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = ucs1002_regulator_enable,
.disable = regulator_disable_regmap,
};
static const struct regulator_desc ucs1002_regulator_descriptor = {
.name = "ucs1002-vbus",
.ops = &ucs1002_regulator_ops,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.enable_reg = UCS1002_REG_SWITCH_CFG,
.enable_mask = F_PWR_EN_SET,
.enable_val = F_PWR_EN_SET,
.fixed_uV = 5000000,
.n_voltages = 1,
};
static int ucs1002_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct power_supply_config charger_config = {};
const struct regmap_config regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
struct regulator_config regulator_config = {};
int irq_a_det, irq_alert, ret;
struct ucs1002_info *info;
unsigned int regval;
info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->regmap = devm_regmap_init_i2c(client, ®map_config);
ret = PTR_ERR_OR_ZERO(info->regmap);
if (ret) {
dev_err(dev, "Regmap initialization failed: %d\n", ret);
return ret;
}
info->client = client;
irq_a_det = of_irq_get_byname(dev->of_node, "a_det");
irq_alert = of_irq_get_byname(dev->of_node, "alert");
charger_config.of_node = dev->of_node;
charger_config.drv_data = info;
ret = regmap_read(info->regmap, UCS1002_REG_PRODUCT_ID, ®val);
if (ret) {
dev_err(dev, "Failed to read product ID: %d\n", ret);
return ret;
}
if (regval != UCS1002_PRODUCT_ID) {
dev_err(dev,
"Product ID does not match (0x%02x != 0x%02x)\n",
regval, UCS1002_PRODUCT_ID);
return -ENODEV;
}
/* Enable charge rationing by default */
ret = regmap_update_bits(info->regmap, UCS1002_REG_GENERAL_CFG,
F_RATION_EN, F_RATION_EN);
if (ret) {
dev_err(dev, "Failed to read general config: %d\n", ret);
return ret;
}
/*
* Ignore the M1, M2, PWR_EN, and EM_EN pin states. Set active
* mode selection to BC1.2 CDP.
*/
ret = regmap_update_bits(info->regmap, UCS1002_REG_SWITCH_CFG,
V_SET_ACTIVE_MODE_MASK | F_PIN_IGNORE,
V_SET_ACTIVE_MODE_BC12_CDP | F_PIN_IGNORE);
if (ret) {
dev_err(dev, "Failed to configure default mode: %d\n", ret);
return ret;
}
/*
* Be safe and set initial current limit to 500mA
*/
ret = ucs1002_set_max_current(info, 500000);
if (ret) {
dev_err(dev, "Failed to set max current default: %d\n", ret);
return ret;
}
info->charger = devm_power_supply_register(dev, &ucs1002_charger_desc,
&charger_config);
ret = PTR_ERR_OR_ZERO(info->charger);
if (ret) {
dev_err(dev, "Failed to register power supply: %d\n", ret);
return ret;
}
ret = regmap_read(info->regmap, UCS1002_REG_PIN_STATUS, ®val);
if (ret) {
dev_err(dev, "Failed to read pin status: %d\n", ret);
return ret;
}
info->regulator_descriptor =
devm_kmemdup(dev, &ucs1002_regulator_descriptor,
sizeof(ucs1002_regulator_descriptor),
GFP_KERNEL);
if (!info->regulator_descriptor)
return -ENOMEM;
info->regulator_descriptor->enable_is_inverted = !(regval & F_SEL_PIN);
regulator_config.dev = dev;
regulator_config.of_node = dev->of_node;
regulator_config.regmap = info->regmap;
regulator_config.driver_data = info;
info->rdev = devm_regulator_register(dev, info->regulator_descriptor,
®ulator_config);
ret = PTR_ERR_OR_ZERO(info->rdev);
if (ret) {
dev_err(dev, "Failed to register VBUS regulator: %d\n", ret);
return ret;
}
info->health = POWER_SUPPLY_HEALTH_GOOD;
INIT_DELAYED_WORK(&info->health_poll, ucs1002_health_poll);
if (irq_a_det > 0) {
ret = devm_request_threaded_irq(dev, irq_a_det, NULL,
ucs1002_charger_irq,
IRQF_ONESHOT,
"ucs1002-a_det", info);
if (ret) {
dev_err(dev, "Failed to request A_DET threaded irq: %d\n",
ret);
return ret;
}
}
if (irq_alert > 0) {
ret = devm_request_irq(dev, irq_alert, ucs1002_alert_irq,
0,"ucs1002-alert", info);
if (ret) {
dev_err(dev, "Failed to request ALERT threaded irq: %d\n",
ret);
return ret;
}
}
return 0;
}
static const struct of_device_id ucs1002_of_match[] = {
{ .compatible = "microchip,ucs1002", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, ucs1002_of_match);
static struct i2c_driver ucs1002_driver = {
.driver = {
.name = "ucs1002",
.of_match_table = ucs1002_of_match,
},
.probe = ucs1002_probe,
};
module_i2c_driver(ucs1002_driver);
MODULE_DESCRIPTION("Microchip UCS1002 Programmable USB Port Power Controller");
MODULE_AUTHOR("Enric Balletbo Serra <[email protected]>");
MODULE_AUTHOR("Andrey Smirnov <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/ucs1002_power.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
*
* h3xxx atmel micro companion support, battery subdevice
* based on previous kernel 2.4 version
* Author : Alessandro Gardich <[email protected]>
* Author : Linus Walleij <[email protected]>
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/mfd/ipaq-micro.h>
#include <linux/power_supply.h>
#include <linux/workqueue.h>
#define BATT_PERIOD 100000 /* 100 seconds in milliseconds */
#define MICRO_BATT_CHEM_ALKALINE 0x01
#define MICRO_BATT_CHEM_NICD 0x02
#define MICRO_BATT_CHEM_NIMH 0x03
#define MICRO_BATT_CHEM_LION 0x04
#define MICRO_BATT_CHEM_LIPOLY 0x05
#define MICRO_BATT_CHEM_NOT_INSTALLED 0x06
#define MICRO_BATT_CHEM_UNKNOWN 0xff
#define MICRO_BATT_STATUS_HIGH 0x01
#define MICRO_BATT_STATUS_LOW 0x02
#define MICRO_BATT_STATUS_CRITICAL 0x04
#define MICRO_BATT_STATUS_CHARGING 0x08
#define MICRO_BATT_STATUS_CHARGEMAIN 0x10
#define MICRO_BATT_STATUS_DEAD 0x20 /* Battery will not charge */
#define MICRO_BATT_STATUS_NOTINSTALLED 0x20 /* For expansion pack batteries */
#define MICRO_BATT_STATUS_FULL 0x40 /* Battery fully charged */
#define MICRO_BATT_STATUS_NOBATTERY 0x80
#define MICRO_BATT_STATUS_UNKNOWN 0xff
struct micro_battery {
struct ipaq_micro *micro;
struct workqueue_struct *wq;
struct delayed_work update;
u8 ac;
u8 chemistry;
unsigned int voltage;
u16 temperature;
u8 flag;
};
static void micro_battery_work(struct work_struct *work)
{
struct micro_battery *mb = container_of(work,
struct micro_battery, update.work);
struct ipaq_micro_msg msg_battery = {
.id = MSG_BATTERY,
};
struct ipaq_micro_msg msg_sensor = {
.id = MSG_THERMAL_SENSOR,
};
/* First send battery message */
ipaq_micro_tx_msg_sync(mb->micro, &msg_battery);
if (msg_battery.rx_len < 4)
pr_info("ERROR");
/*
* Returned message format:
* byte 0: 0x00 = Not plugged in
* 0x01 = AC adapter plugged in
* byte 1: chemistry
* byte 2: voltage LSB
* byte 3: voltage MSB
* byte 4: flags
* byte 5-9: same for battery 2
*/
mb->ac = msg_battery.rx_data[0];
mb->chemistry = msg_battery.rx_data[1];
mb->voltage = ((((unsigned short)msg_battery.rx_data[3] << 8) +
msg_battery.rx_data[2]) * 5000L) * 1000 / 1024;
mb->flag = msg_battery.rx_data[4];
if (msg_battery.rx_len == 9)
pr_debug("second battery ignored\n");
/* Then read the sensor */
ipaq_micro_tx_msg_sync(mb->micro, &msg_sensor);
mb->temperature = msg_sensor.rx_data[1] << 8 | msg_sensor.rx_data[0];
queue_delayed_work(mb->wq, &mb->update, msecs_to_jiffies(BATT_PERIOD));
}
static int get_capacity(struct power_supply *b)
{
struct micro_battery *mb = dev_get_drvdata(b->dev.parent);
switch (mb->flag & 0x07) {
case MICRO_BATT_STATUS_HIGH:
return 100;
break;
case MICRO_BATT_STATUS_LOW:
return 50;
break;
case MICRO_BATT_STATUS_CRITICAL:
return 5;
break;
default:
break;
}
return 0;
}
static int get_status(struct power_supply *b)
{
struct micro_battery *mb = dev_get_drvdata(b->dev.parent);
if (mb->flag == MICRO_BATT_STATUS_UNKNOWN)
return POWER_SUPPLY_STATUS_UNKNOWN;
if (mb->flag & MICRO_BATT_STATUS_FULL)
return POWER_SUPPLY_STATUS_FULL;
if ((mb->flag & MICRO_BATT_STATUS_CHARGING) ||
(mb->flag & MICRO_BATT_STATUS_CHARGEMAIN))
return POWER_SUPPLY_STATUS_CHARGING;
return POWER_SUPPLY_STATUS_DISCHARGING;
}
static int micro_batt_get_property(struct power_supply *b,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct micro_battery *mb = dev_get_drvdata(b->dev.parent);
switch (psp) {
case POWER_SUPPLY_PROP_TECHNOLOGY:
switch (mb->chemistry) {
case MICRO_BATT_CHEM_NICD:
val->intval = POWER_SUPPLY_TECHNOLOGY_NiCd;
break;
case MICRO_BATT_CHEM_NIMH:
val->intval = POWER_SUPPLY_TECHNOLOGY_NiMH;
break;
case MICRO_BATT_CHEM_LION:
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
break;
case MICRO_BATT_CHEM_LIPOLY:
val->intval = POWER_SUPPLY_TECHNOLOGY_LIPO;
break;
default:
val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
break;
}
break;
case POWER_SUPPLY_PROP_STATUS:
val->intval = get_status(b);
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
val->intval = 4700000;
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = get_capacity(b);
break;
case POWER_SUPPLY_PROP_TEMP:
val->intval = mb->temperature;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = mb->voltage;
break;
default:
return -EINVAL;
}
return 0;
}
static int micro_ac_get_property(struct power_supply *b,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct micro_battery *mb = dev_get_drvdata(b->dev.parent);
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = mb->ac;
break;
default:
return -EINVAL;
}
return 0;
}
static enum power_supply_property micro_batt_power_props[] = {
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
};
static const struct power_supply_desc micro_batt_power_desc = {
.name = "main-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = micro_batt_power_props,
.num_properties = ARRAY_SIZE(micro_batt_power_props),
.get_property = micro_batt_get_property,
.use_for_apm = 1,
};
static enum power_supply_property micro_ac_power_props[] = {
POWER_SUPPLY_PROP_ONLINE,
};
static const struct power_supply_desc micro_ac_power_desc = {
.name = "ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = micro_ac_power_props,
.num_properties = ARRAY_SIZE(micro_ac_power_props),
.get_property = micro_ac_get_property,
};
static struct power_supply *micro_batt_power, *micro_ac_power;
static int micro_batt_probe(struct platform_device *pdev)
{
struct micro_battery *mb;
int ret;
mb = devm_kzalloc(&pdev->dev, sizeof(*mb), GFP_KERNEL);
if (!mb)
return -ENOMEM;
mb->micro = dev_get_drvdata(pdev->dev.parent);
mb->wq = alloc_workqueue("ipaq-battery-wq", WQ_MEM_RECLAIM, 0);
if (!mb->wq)
return -ENOMEM;
INIT_DELAYED_WORK(&mb->update, micro_battery_work);
platform_set_drvdata(pdev, mb);
queue_delayed_work(mb->wq, &mb->update, 1);
micro_batt_power = power_supply_register(&pdev->dev,
µ_batt_power_desc, NULL);
if (IS_ERR(micro_batt_power)) {
ret = PTR_ERR(micro_batt_power);
goto batt_err;
}
micro_ac_power = power_supply_register(&pdev->dev,
µ_ac_power_desc, NULL);
if (IS_ERR(micro_ac_power)) {
ret = PTR_ERR(micro_ac_power);
goto ac_err;
}
dev_info(&pdev->dev, "iPAQ micro battery driver\n");
return 0;
ac_err:
power_supply_unregister(micro_batt_power);
batt_err:
cancel_delayed_work_sync(&mb->update);
destroy_workqueue(mb->wq);
return ret;
}
static int micro_batt_remove(struct platform_device *pdev)
{
struct micro_battery *mb = platform_get_drvdata(pdev);
power_supply_unregister(micro_ac_power);
power_supply_unregister(micro_batt_power);
cancel_delayed_work_sync(&mb->update);
destroy_workqueue(mb->wq);
return 0;
}
static int __maybe_unused micro_batt_suspend(struct device *dev)
{
struct micro_battery *mb = dev_get_drvdata(dev);
cancel_delayed_work_sync(&mb->update);
return 0;
}
static int __maybe_unused micro_batt_resume(struct device *dev)
{
struct micro_battery *mb = dev_get_drvdata(dev);
queue_delayed_work(mb->wq, &mb->update, msecs_to_jiffies(BATT_PERIOD));
return 0;
}
static const struct dev_pm_ops micro_batt_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(micro_batt_suspend, micro_batt_resume)
};
static struct platform_driver micro_batt_device_driver = {
.driver = {
.name = "ipaq-micro-battery",
.pm = µ_batt_dev_pm_ops,
},
.probe = micro_batt_probe,
.remove = micro_batt_remove,
};
module_platform_driver(micro_batt_device_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("driver for iPAQ Atmel micro battery");
MODULE_ALIAS("platform:ipaq-micro-battery");
| linux-master | drivers/power/supply/ipaq_micro_battery.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* axp288_fuel_gauge.c - Xpower AXP288 PMIC Fuel Gauge Driver
*
* Copyright (C) 2020-2021 Andrejus Basovas <[email protected]>
* Copyright (C) 2016-2021 Hans de Goede <[email protected]>
* Copyright (C) 2014 Intel Corporation
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/regmap.h>
#include <linux/jiffies.h>
#include <linux/interrupt.h>
#include <linux/mfd/axp20x.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/iio/consumer.h>
#include <asm/unaligned.h>
#include <asm/iosf_mbi.h>
#define PS_STAT_VBUS_TRIGGER (1 << 0)
#define PS_STAT_BAT_CHRG_DIR (1 << 2)
#define PS_STAT_VBAT_ABOVE_VHOLD (1 << 3)
#define PS_STAT_VBUS_VALID (1 << 4)
#define PS_STAT_VBUS_PRESENT (1 << 5)
#define CHRG_STAT_BAT_SAFE_MODE (1 << 3)
#define CHRG_STAT_BAT_VALID (1 << 4)
#define CHRG_STAT_BAT_PRESENT (1 << 5)
#define CHRG_STAT_CHARGING (1 << 6)
#define CHRG_STAT_PMIC_OTP (1 << 7)
#define CHRG_CCCV_CC_MASK 0xf /* 4 bits */
#define CHRG_CCCV_CC_BIT_POS 0
#define CHRG_CCCV_CC_OFFSET 200 /* 200mA */
#define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */
#define CHRG_CCCV_ITERM_20P (1 << 4) /* 20% of CC */
#define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */
#define CHRG_CCCV_CV_BIT_POS 5
#define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */
#define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */
#define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */
#define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */
#define CHRG_CCCV_CHG_EN (1 << 7)
#define FG_CNTL_OCV_ADJ_STAT (1 << 2)
#define FG_CNTL_OCV_ADJ_EN (1 << 3)
#define FG_CNTL_CAP_ADJ_STAT (1 << 4)
#define FG_CNTL_CAP_ADJ_EN (1 << 5)
#define FG_CNTL_CC_EN (1 << 6)
#define FG_CNTL_GAUGE_EN (1 << 7)
#define FG_15BIT_WORD_VALID (1 << 15)
#define FG_15BIT_VAL_MASK 0x7fff
#define FG_REP_CAP_VALID (1 << 7)
#define FG_REP_CAP_VAL_MASK 0x7F
#define FG_DES_CAP1_VALID (1 << 7)
#define FG_DES_CAP_RES_LSB 1456 /* 1.456mAhr */
#define FG_DES_CC_RES_LSB 1456 /* 1.456mAhr */
#define FG_OCV_CAP_VALID (1 << 7)
#define FG_OCV_CAP_VAL_MASK 0x7F
#define FG_CC_CAP_VALID (1 << 7)
#define FG_CC_CAP_VAL_MASK 0x7F
#define FG_LOW_CAP_THR1_MASK 0xf0 /* 5% tp 20% */
#define FG_LOW_CAP_THR1_VAL 0xa0 /* 15 perc */
#define FG_LOW_CAP_THR2_MASK 0x0f /* 0% to 15% */
#define FG_LOW_CAP_WARN_THR 14 /* 14 perc */
#define FG_LOW_CAP_CRIT_THR 4 /* 4 perc */
#define FG_LOW_CAP_SHDN_THR 0 /* 0 perc */
#define DEV_NAME "axp288_fuel_gauge"
/* 1.1mV per LSB expressed in uV */
#define VOLTAGE_FROM_ADC(a) ((a * 11) / 10)
/* properties converted to uV, uA */
#define PROP_VOLT(a) ((a) * 1000)
#define PROP_CURR(a) ((a) * 1000)
#define AXP288_REG_UPDATE_INTERVAL (60 * HZ)
#define AXP288_FG_INTR_NUM 6
#define AXP288_QUIRK_NO_BATTERY BIT(0)
static bool no_current_sense_res;
module_param(no_current_sense_res, bool, 0444);
MODULE_PARM_DESC(no_current_sense_res, "No (or broken) current sense resistor");
enum {
QWBTU_IRQ = 0,
WBTU_IRQ,
QWBTO_IRQ,
WBTO_IRQ,
WL2_IRQ,
WL1_IRQ,
};
enum {
BAT_CHRG_CURR,
BAT_D_CURR,
BAT_VOLT,
IIO_CHANNEL_NUM
};
struct axp288_fg_info {
struct device *dev;
struct regmap *regmap;
int irq[AXP288_FG_INTR_NUM];
struct iio_channel *iio_channel[IIO_CHANNEL_NUM];
struct power_supply *bat;
struct mutex lock;
int status;
int max_volt;
int pwr_op;
int low_cap;
struct dentry *debug_file;
char valid; /* zero until following fields are valid */
unsigned long last_updated; /* in jiffies */
int pwr_stat;
int fg_res;
int bat_volt;
int d_curr;
int c_curr;
int ocv;
int fg_cc_mtr1;
int fg_des_cap1;
};
static enum power_supply_property fuel_gauge_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_OCV,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN,
POWER_SUPPLY_PROP_TECHNOLOGY,
/* The 3 props below are not used when no_current_sense_res is set */
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
static int fuel_gauge_reg_readb(struct axp288_fg_info *info, int reg)
{
unsigned int val;
int ret;
ret = regmap_read(info->regmap, reg, &val);
if (ret < 0) {
dev_err(info->dev, "Error reading reg 0x%02x err: %d\n", reg, ret);
return ret;
}
return val;
}
static int fuel_gauge_reg_writeb(struct axp288_fg_info *info, int reg, u8 val)
{
int ret;
ret = regmap_write(info->regmap, reg, (unsigned int)val);
if (ret < 0)
dev_err(info->dev, "Error writing reg 0x%02x err: %d\n", reg, ret);
return ret;
}
static int fuel_gauge_read_15bit_word(struct axp288_fg_info *info, int reg)
{
unsigned char buf[2];
int ret;
ret = regmap_bulk_read(info->regmap, reg, buf, 2);
if (ret < 0) {
dev_err(info->dev, "Error reading reg 0x%02x err: %d\n", reg, ret);
return ret;
}
ret = get_unaligned_be16(buf);
if (!(ret & FG_15BIT_WORD_VALID)) {
dev_err(info->dev, "Error reg 0x%02x contents not valid\n", reg);
return -ENXIO;
}
return ret & FG_15BIT_VAL_MASK;
}
static int fuel_gauge_read_12bit_word(struct axp288_fg_info *info, int reg)
{
unsigned char buf[2];
int ret;
ret = regmap_bulk_read(info->regmap, reg, buf, 2);
if (ret < 0) {
dev_err(info->dev, "Error reading reg 0x%02x err: %d\n", reg, ret);
return ret;
}
/* 12-bit data values have upper 8 bits in buf[0], lower 4 in buf[1] */
return (buf[0] << 4) | ((buf[1] >> 4) & 0x0f);
}
static int fuel_gauge_update_registers(struct axp288_fg_info *info)
{
int ret;
if (info->valid && time_before(jiffies, info->last_updated + AXP288_REG_UPDATE_INTERVAL))
return 0;
dev_dbg(info->dev, "Fuel Gauge updating register values...\n");
ret = iosf_mbi_block_punit_i2c_access();
if (ret < 0)
return ret;
ret = fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS);
if (ret < 0)
goto out;
info->pwr_stat = ret;
if (no_current_sense_res)
ret = fuel_gauge_reg_readb(info, AXP288_FG_OCV_CAP_REG);
else
ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES);
if (ret < 0)
goto out;
info->fg_res = ret;
ret = iio_read_channel_raw(info->iio_channel[BAT_VOLT], &info->bat_volt);
if (ret < 0)
goto out;
ret = fuel_gauge_read_12bit_word(info, AXP288_FG_OCVH_REG);
if (ret < 0)
goto out;
info->ocv = ret;
if (no_current_sense_res)
goto out_no_current_sense_res;
if (info->pwr_stat & PS_STAT_BAT_CHRG_DIR) {
info->d_curr = 0;
ret = iio_read_channel_raw(info->iio_channel[BAT_CHRG_CURR], &info->c_curr);
if (ret < 0)
goto out;
} else {
info->c_curr = 0;
ret = iio_read_channel_raw(info->iio_channel[BAT_D_CURR], &info->d_curr);
if (ret < 0)
goto out;
}
ret = fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG);
if (ret < 0)
goto out;
info->fg_cc_mtr1 = ret;
ret = fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG);
if (ret < 0)
goto out;
info->fg_des_cap1 = ret;
out_no_current_sense_res:
info->last_updated = jiffies;
info->valid = 1;
ret = 0;
out:
iosf_mbi_unblock_punit_i2c_access();
return ret;
}
static void fuel_gauge_get_status(struct axp288_fg_info *info)
{
int pwr_stat = info->pwr_stat;
int fg_res = info->fg_res;
int curr = info->d_curr;
/* Report full if Vbus is valid and the reported capacity is 100% */
if (!(pwr_stat & PS_STAT_VBUS_VALID))
goto not_full;
if (!(fg_res & FG_REP_CAP_VALID))
goto not_full;
fg_res &= ~FG_REP_CAP_VALID;
if (fg_res == 100) {
info->status = POWER_SUPPLY_STATUS_FULL;
return;
}
/*
* Sometimes the charger turns itself off before fg-res reaches 100%.
* When this happens the AXP288 reports a not-charging status and
* 0 mA discharge current.
*/
if (fg_res < 90 || (pwr_stat & PS_STAT_BAT_CHRG_DIR) || no_current_sense_res)
goto not_full;
if (curr == 0) {
info->status = POWER_SUPPLY_STATUS_FULL;
return;
}
not_full:
if (pwr_stat & PS_STAT_BAT_CHRG_DIR)
info->status = POWER_SUPPLY_STATUS_CHARGING;
else
info->status = POWER_SUPPLY_STATUS_DISCHARGING;
}
static int fuel_gauge_battery_health(struct axp288_fg_info *info)
{
int vocv = VOLTAGE_FROM_ADC(info->ocv);
int health = POWER_SUPPLY_HEALTH_UNKNOWN;
if (vocv > info->max_volt)
health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
else
health = POWER_SUPPLY_HEALTH_GOOD;
return health;
}
static int fuel_gauge_get_property(struct power_supply *ps,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct axp288_fg_info *info = power_supply_get_drvdata(ps);
int ret, value;
mutex_lock(&info->lock);
ret = fuel_gauge_update_registers(info);
if (ret < 0)
goto out;
switch (prop) {
case POWER_SUPPLY_PROP_STATUS:
fuel_gauge_get_status(info);
val->intval = info->status;
break;
case POWER_SUPPLY_PROP_HEALTH:
val->intval = fuel_gauge_battery_health(info);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
value = VOLTAGE_FROM_ADC(info->bat_volt);
val->intval = PROP_VOLT(value);
break;
case POWER_SUPPLY_PROP_VOLTAGE_OCV:
value = VOLTAGE_FROM_ADC(info->ocv);
val->intval = PROP_VOLT(value);
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
if (info->d_curr > 0)
value = -1 * info->d_curr;
else
value = info->c_curr;
val->intval = PROP_CURR(value);
break;
case POWER_SUPPLY_PROP_PRESENT:
if (info->pwr_op & CHRG_STAT_BAT_PRESENT)
val->intval = 1;
else
val->intval = 0;
break;
case POWER_SUPPLY_PROP_CAPACITY:
if (!(info->fg_res & FG_REP_CAP_VALID))
dev_err(info->dev, "capacity measurement not valid\n");
val->intval = (info->fg_res & FG_REP_CAP_VAL_MASK);
break;
case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
val->intval = (info->low_cap & 0x0f);
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
val->intval = info->fg_cc_mtr1 * FG_DES_CAP_RES_LSB;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
val->intval = info->fg_des_cap1 * FG_DES_CAP_RES_LSB;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
val->intval = PROP_VOLT(info->max_volt);
break;
default:
ret = -EINVAL;
}
out:
mutex_unlock(&info->lock);
return ret;
}
static int fuel_gauge_set_property(struct power_supply *ps,
enum power_supply_property prop,
const union power_supply_propval *val)
{
struct axp288_fg_info *info = power_supply_get_drvdata(ps);
int new_low_cap, ret = 0;
mutex_lock(&info->lock);
switch (prop) {
case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
if ((val->intval < 0) || (val->intval > 15)) {
ret = -EINVAL;
break;
}
new_low_cap = info->low_cap;
new_low_cap &= 0xf0;
new_low_cap |= (val->intval & 0xf);
ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, new_low_cap);
if (ret == 0)
info->low_cap = new_low_cap;
break;
default:
ret = -EINVAL;
break;
}
mutex_unlock(&info->lock);
return ret;
}
static int fuel_gauge_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
ret = 1;
break;
default:
ret = 0;
}
return ret;
}
static irqreturn_t fuel_gauge_thread_handler(int irq, void *dev)
{
struct axp288_fg_info *info = dev;
int i;
for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
if (info->irq[i] == irq)
break;
}
if (i >= AXP288_FG_INTR_NUM) {
dev_warn(info->dev, "spurious interrupt!!\n");
return IRQ_NONE;
}
switch (i) {
case QWBTU_IRQ:
dev_info(info->dev, "Quit Battery under temperature in work mode IRQ (QWBTU)\n");
break;
case WBTU_IRQ:
dev_info(info->dev, "Battery under temperature in work mode IRQ (WBTU)\n");
break;
case QWBTO_IRQ:
dev_info(info->dev, "Quit Battery over temperature in work mode IRQ (QWBTO)\n");
break;
case WBTO_IRQ:
dev_info(info->dev, "Battery over temperature in work mode IRQ (WBTO)\n");
break;
case WL2_IRQ:
dev_info(info->dev, "Low Batt Warning(2) INTR\n");
break;
case WL1_IRQ:
dev_info(info->dev, "Low Batt Warning(1) INTR\n");
break;
default:
dev_warn(info->dev, "Spurious Interrupt!!!\n");
}
mutex_lock(&info->lock);
info->valid = 0; /* Force updating of the cached registers */
mutex_unlock(&info->lock);
power_supply_changed(info->bat);
return IRQ_HANDLED;
}
static void fuel_gauge_external_power_changed(struct power_supply *psy)
{
struct axp288_fg_info *info = power_supply_get_drvdata(psy);
mutex_lock(&info->lock);
info->valid = 0; /* Force updating of the cached registers */
mutex_unlock(&info->lock);
power_supply_changed(psy);
}
static struct power_supply_desc fuel_gauge_desc = {
.name = DEV_NAME,
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = fuel_gauge_props,
.num_properties = ARRAY_SIZE(fuel_gauge_props),
.get_property = fuel_gauge_get_property,
.set_property = fuel_gauge_set_property,
.property_is_writeable = fuel_gauge_property_is_writeable,
.external_power_changed = fuel_gauge_external_power_changed,
};
/*
* Some devices have no battery (HDMI sticks) and the axp288 battery's
* detection reports one despite it not being there.
* Please keep this listed sorted alphabetically.
*/
static const struct dmi_system_id axp288_quirks[] = {
{
/* ACEPC T8 Cherry Trail Z8350 mini PC */
.matches = {
DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "To be filled by O.E.M."),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "Cherry Trail CR"),
DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "T8"),
/* also match on somewhat unique bios-version */
DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1.000"),
},
.driver_data = (void *)AXP288_QUIRK_NO_BATTERY,
},
{
/* ACEPC T11 Cherry Trail Z8350 mini PC */
.matches = {
DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "To be filled by O.E.M."),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "Cherry Trail CR"),
DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "T11"),
/* also match on somewhat unique bios-version */
DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1.000"),
},
.driver_data = (void *)AXP288_QUIRK_NO_BATTERY,
},
{
/* Intel Cherry Trail Compute Stick, Windows version */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Intel"),
DMI_MATCH(DMI_PRODUCT_NAME, "STK1AW32SC"),
},
.driver_data = (void *)AXP288_QUIRK_NO_BATTERY,
},
{
/* Intel Cherry Trail Compute Stick, version without an OS */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Intel"),
DMI_MATCH(DMI_PRODUCT_NAME, "STK1A32SC"),
},
.driver_data = (void *)AXP288_QUIRK_NO_BATTERY,
},
{
/* Meegopad T02 */
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "MEEGOPAD T02"),
},
.driver_data = (void *)AXP288_QUIRK_NO_BATTERY,
},
{ /* Mele PCG03 Mini PC */
.matches = {
DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "Mini PC"),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "Mini PC"),
},
.driver_data = (void *)AXP288_QUIRK_NO_BATTERY,
},
{
/* Minix Neo Z83-4 mini PC */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "MINIX"),
DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"),
},
.driver_data = (void *)AXP288_QUIRK_NO_BATTERY,
},
{
/*
* One Mix 1, this uses the "T3 MRD" boardname used by
* generic mini PCs, but it is a mini laptop so it does
* actually have a battery!
*/
.matches = {
DMI_MATCH(DMI_BOARD_NAME, "T3 MRD"),
DMI_MATCH(DMI_BIOS_DATE, "06/14/2018"),
},
.driver_data = NULL,
},
{
/*
* Various Ace PC/Meegopad/MinisForum/Wintel Mini-PCs/HDMI-sticks
* This entry must be last because it is generic, this allows
* adding more specifuc quirks overriding this generic entry.
*/
.matches = {
DMI_MATCH(DMI_BOARD_NAME, "T3 MRD"),
DMI_MATCH(DMI_CHASSIS_TYPE, "3"),
DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
},
.driver_data = (void *)AXP288_QUIRK_NO_BATTERY,
},
{}
};
static int axp288_fuel_gauge_read_initial_regs(struct axp288_fg_info *info)
{
unsigned int val;
int ret;
/*
* On some devices the fuelgauge and charger parts of the axp288 are
* not used, check that the fuelgauge is enabled (CC_CTRL != 0).
*/
ret = regmap_read(info->regmap, AXP20X_CC_CTRL, &val);
if (ret < 0)
return ret;
if (val == 0)
return -ENODEV;
ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG);
if (ret < 0)
return ret;
if (!(ret & FG_DES_CAP1_VALID)) {
dev_err(info->dev, "axp288 not configured by firmware\n");
return -ENODEV;
}
ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1);
if (ret < 0)
return ret;
switch ((ret & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS) {
case CHRG_CCCV_CV_4100MV:
info->max_volt = 4100;
break;
case CHRG_CCCV_CV_4150MV:
info->max_volt = 4150;
break;
case CHRG_CCCV_CV_4200MV:
info->max_volt = 4200;
break;
case CHRG_CCCV_CV_4350MV:
info->max_volt = 4350;
break;
}
ret = fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE);
if (ret < 0)
return ret;
info->pwr_op = ret;
ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG);
if (ret < 0)
return ret;
info->low_cap = ret;
return 0;
}
static void axp288_fuel_gauge_release_iio_chans(void *data)
{
struct axp288_fg_info *info = data;
int i;
for (i = 0; i < IIO_CHANNEL_NUM; i++)
if (!IS_ERR_OR_NULL(info->iio_channel[i]))
iio_channel_release(info->iio_channel[i]);
}
static int axp288_fuel_gauge_probe(struct platform_device *pdev)
{
struct axp288_fg_info *info;
struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
struct power_supply_config psy_cfg = {};
static const char * const iio_chan_name[] = {
[BAT_CHRG_CURR] = "axp288-chrg-curr",
[BAT_D_CURR] = "axp288-chrg-d-curr",
[BAT_VOLT] = "axp288-batt-volt",
};
const struct dmi_system_id *dmi_id;
struct device *dev = &pdev->dev;
unsigned long quirks = 0;
int i, pirq, ret;
/*
* Normally the native AXP288 fg/charger drivers are preferred but
* on some devices the ACPI drivers should be used instead.
*/
if (!acpi_quirk_skip_acpi_ac_and_battery())
return -ENODEV;
dmi_id = dmi_first_match(axp288_quirks);
if (dmi_id)
quirks = (unsigned long)dmi_id->driver_data;
if (quirks & AXP288_QUIRK_NO_BATTERY)
return -ENODEV;
info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->dev = dev;
info->regmap = axp20x->regmap;
info->status = POWER_SUPPLY_STATUS_UNKNOWN;
info->valid = 0;
platform_set_drvdata(pdev, info);
mutex_init(&info->lock);
for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
pirq = platform_get_irq(pdev, i);
if (pirq < 0)
continue;
ret = regmap_irq_get_virq(axp20x->regmap_irqc, pirq);
if (ret < 0)
return dev_err_probe(dev, ret, "getting vIRQ %d\n", pirq);
info->irq[i] = ret;
}
for (i = 0; i < IIO_CHANNEL_NUM; i++) {
/*
* Note cannot use devm_iio_channel_get because x86 systems
* lack the device<->channel maps which iio_channel_get will
* try to use when passed a non NULL device pointer.
*/
info->iio_channel[i] =
iio_channel_get(NULL, iio_chan_name[i]);
if (IS_ERR(info->iio_channel[i])) {
ret = PTR_ERR(info->iio_channel[i]);
dev_dbg(dev, "error getting iiochan %s: %d\n", iio_chan_name[i], ret);
/* Wait for axp288_adc to load */
if (ret == -ENODEV)
ret = -EPROBE_DEFER;
axp288_fuel_gauge_release_iio_chans(info);
return ret;
}
}
ret = devm_add_action_or_reset(dev, axp288_fuel_gauge_release_iio_chans, info);
if (ret)
return ret;
ret = iosf_mbi_block_punit_i2c_access();
if (ret < 0)
return ret;
ret = axp288_fuel_gauge_read_initial_regs(info);
iosf_mbi_unblock_punit_i2c_access();
if (ret < 0)
return ret;
psy_cfg.drv_data = info;
if (no_current_sense_res)
fuel_gauge_desc.num_properties = ARRAY_SIZE(fuel_gauge_props) - 3;
info->bat = devm_power_supply_register(dev, &fuel_gauge_desc, &psy_cfg);
if (IS_ERR(info->bat)) {
ret = PTR_ERR(info->bat);
dev_err(dev, "failed to register battery: %d\n", ret);
return ret;
}
for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
ret = devm_request_threaded_irq(dev, info->irq[i], NULL,
fuel_gauge_thread_handler,
IRQF_ONESHOT, DEV_NAME, info);
if (ret)
return dev_err_probe(dev, ret, "requesting IRQ %d\n", info->irq[i]);
}
return 0;
}
static const struct platform_device_id axp288_fg_id_table[] = {
{ .name = DEV_NAME },
{},
};
MODULE_DEVICE_TABLE(platform, axp288_fg_id_table);
static struct platform_driver axp288_fuel_gauge_driver = {
.probe = axp288_fuel_gauge_probe,
.id_table = axp288_fg_id_table,
.driver = {
.name = DEV_NAME,
},
};
module_platform_driver(axp288_fuel_gauge_driver);
MODULE_AUTHOR("Ramakrishna Pallala <[email protected]>");
MODULE_AUTHOR("Todd Brandt <[email protected]>");
MODULE_DESCRIPTION("Xpower AXP288 Fuel Gauge Driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/axp288_fuel_gauge.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for LP8727 Micro/Mini USB IC with integrated charger
*
* Copyright (C) 2011 Texas Instruments
* Copyright (C) 2011 National Semiconductor
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/power_supply.h>
#include <linux/platform_data/lp8727.h>
#include <linux/of.h>
#define LP8788_NUM_INTREGS 2
#define DEFAULT_DEBOUNCE_MSEC 270
/* Registers */
#define LP8727_CTRL1 0x1
#define LP8727_CTRL2 0x2
#define LP8727_SWCTRL 0x3
#define LP8727_INT1 0x4
#define LP8727_INT2 0x5
#define LP8727_STATUS1 0x6
#define LP8727_STATUS2 0x7
#define LP8727_CHGCTRL2 0x9
/* CTRL1 register */
#define LP8727_CP_EN BIT(0)
#define LP8727_ADC_EN BIT(1)
#define LP8727_ID200_EN BIT(4)
/* CTRL2 register */
#define LP8727_CHGDET_EN BIT(1)
#define LP8727_INT_EN BIT(6)
/* SWCTRL register */
#define LP8727_SW_DM1_DM (0x0 << 0)
#define LP8727_SW_DM1_HiZ (0x7 << 0)
#define LP8727_SW_DP2_DP (0x0 << 3)
#define LP8727_SW_DP2_HiZ (0x7 << 3)
/* INT1 register */
#define LP8727_IDNO (0xF << 0)
#define LP8727_VBUS BIT(4)
/* STATUS1 register */
#define LP8727_CHGSTAT (3 << 4)
#define LP8727_CHPORT BIT(6)
#define LP8727_DCPORT BIT(7)
#define LP8727_STAT_EOC 0x30
/* STATUS2 register */
#define LP8727_TEMP_STAT (3 << 5)
#define LP8727_TEMP_SHIFT 5
/* CHGCTRL2 register */
#define LP8727_ICHG_SHIFT 4
enum lp8727_dev_id {
LP8727_ID_NONE,
LP8727_ID_TA,
LP8727_ID_DEDICATED_CHG,
LP8727_ID_USB_CHG,
LP8727_ID_USB_DS,
LP8727_ID_MAX,
};
enum lp8727_die_temp {
LP8788_TEMP_75C,
LP8788_TEMP_95C,
LP8788_TEMP_115C,
LP8788_TEMP_135C,
};
struct lp8727_psy {
struct power_supply *ac;
struct power_supply *usb;
struct power_supply *batt;
};
struct lp8727_chg {
struct device *dev;
struct i2c_client *client;
struct mutex xfer_lock;
struct lp8727_psy *psy;
struct lp8727_platform_data *pdata;
/* Charger Data */
enum lp8727_dev_id devid;
struct lp8727_chg_param *chg_param;
/* Interrupt Handling */
int irq;
struct delayed_work work;
unsigned long debounce_jiffies;
};
static int lp8727_read_bytes(struct lp8727_chg *pchg, u8 reg, u8 *data, u8 len)
{
s32 ret;
mutex_lock(&pchg->xfer_lock);
ret = i2c_smbus_read_i2c_block_data(pchg->client, reg, len, data);
mutex_unlock(&pchg->xfer_lock);
return (ret != len) ? -EIO : 0;
}
static inline int lp8727_read_byte(struct lp8727_chg *pchg, u8 reg, u8 *data)
{
return lp8727_read_bytes(pchg, reg, data, 1);
}
static int lp8727_write_byte(struct lp8727_chg *pchg, u8 reg, u8 data)
{
int ret;
mutex_lock(&pchg->xfer_lock);
ret = i2c_smbus_write_byte_data(pchg->client, reg, data);
mutex_unlock(&pchg->xfer_lock);
return ret;
}
static bool lp8727_is_charger_attached(const char *name, int id)
{
if (!strcmp(name, "ac"))
return id == LP8727_ID_TA || id == LP8727_ID_DEDICATED_CHG;
else if (!strcmp(name, "usb"))
return id == LP8727_ID_USB_CHG;
return id >= LP8727_ID_TA && id <= LP8727_ID_USB_CHG;
}
static int lp8727_init_device(struct lp8727_chg *pchg)
{
u8 val;
int ret;
u8 intstat[LP8788_NUM_INTREGS];
/* clear interrupts */
ret = lp8727_read_bytes(pchg, LP8727_INT1, intstat, LP8788_NUM_INTREGS);
if (ret)
return ret;
val = LP8727_ID200_EN | LP8727_ADC_EN | LP8727_CP_EN;
ret = lp8727_write_byte(pchg, LP8727_CTRL1, val);
if (ret)
return ret;
val = LP8727_INT_EN | LP8727_CHGDET_EN;
return lp8727_write_byte(pchg, LP8727_CTRL2, val);
}
static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg)
{
u8 val;
lp8727_read_byte(pchg, LP8727_STATUS1, &val);
return val & LP8727_DCPORT;
}
static int lp8727_is_usb_charger(struct lp8727_chg *pchg)
{
u8 val;
lp8727_read_byte(pchg, LP8727_STATUS1, &val);
return val & LP8727_CHPORT;
}
static inline void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
{
lp8727_write_byte(pchg, LP8727_SWCTRL, sw);
}
static void lp8727_id_detection(struct lp8727_chg *pchg, u8 id, int vbusin)
{
struct lp8727_platform_data *pdata = pchg->pdata;
u8 devid = LP8727_ID_NONE;
u8 swctrl = LP8727_SW_DM1_HiZ | LP8727_SW_DP2_HiZ;
switch (id) {
case 0x5:
devid = LP8727_ID_TA;
pchg->chg_param = pdata ? pdata->ac : NULL;
break;
case 0xB:
if (lp8727_is_dedicated_charger(pchg)) {
pchg->chg_param = pdata ? pdata->ac : NULL;
devid = LP8727_ID_DEDICATED_CHG;
} else if (lp8727_is_usb_charger(pchg)) {
pchg->chg_param = pdata ? pdata->usb : NULL;
devid = LP8727_ID_USB_CHG;
swctrl = LP8727_SW_DM1_DM | LP8727_SW_DP2_DP;
} else if (vbusin) {
devid = LP8727_ID_USB_DS;
swctrl = LP8727_SW_DM1_DM | LP8727_SW_DP2_DP;
}
break;
default:
devid = LP8727_ID_NONE;
pchg->chg_param = NULL;
break;
}
pchg->devid = devid;
lp8727_ctrl_switch(pchg, swctrl);
}
static void lp8727_enable_chgdet(struct lp8727_chg *pchg)
{
u8 val;
lp8727_read_byte(pchg, LP8727_CTRL2, &val);
val |= LP8727_CHGDET_EN;
lp8727_write_byte(pchg, LP8727_CTRL2, val);
}
static void lp8727_delayed_func(struct work_struct *_work)
{
struct lp8727_chg *pchg = container_of(_work, struct lp8727_chg,
work.work);
u8 intstat[LP8788_NUM_INTREGS];
u8 idno;
u8 vbus;
if (lp8727_read_bytes(pchg, LP8727_INT1, intstat, LP8788_NUM_INTREGS)) {
dev_err(pchg->dev, "can not read INT registers\n");
return;
}
idno = intstat[0] & LP8727_IDNO;
vbus = intstat[0] & LP8727_VBUS;
lp8727_id_detection(pchg, idno, vbus);
lp8727_enable_chgdet(pchg);
power_supply_changed(pchg->psy->ac);
power_supply_changed(pchg->psy->usb);
power_supply_changed(pchg->psy->batt);
}
static irqreturn_t lp8727_isr_func(int irq, void *ptr)
{
struct lp8727_chg *pchg = ptr;
schedule_delayed_work(&pchg->work, pchg->debounce_jiffies);
return IRQ_HANDLED;
}
static int lp8727_setup_irq(struct lp8727_chg *pchg)
{
int ret;
int irq = pchg->client->irq;
unsigned delay_msec = pchg->pdata ? pchg->pdata->debounce_msec :
DEFAULT_DEBOUNCE_MSEC;
INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func);
if (irq <= 0) {
dev_warn(pchg->dev, "invalid irq number: %d\n", irq);
return 0;
}
ret = request_threaded_irq(irq, NULL, lp8727_isr_func,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
"lp8727_irq", pchg);
if (ret)
return ret;
pchg->irq = irq;
pchg->debounce_jiffies = msecs_to_jiffies(delay_msec);
return 0;
}
static void lp8727_release_irq(struct lp8727_chg *pchg)
{
cancel_delayed_work_sync(&pchg->work);
if (pchg->irq)
free_irq(pchg->irq, pchg);
}
static enum power_supply_property lp8727_charger_prop[] = {
POWER_SUPPLY_PROP_ONLINE,
};
static enum power_supply_property lp8727_battery_prop[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_TEMP,
};
static char *battery_supplied_to[] = {
"main_batt",
};
static int lp8727_charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct lp8727_chg *pchg = dev_get_drvdata(psy->dev.parent);
if (psp != POWER_SUPPLY_PROP_ONLINE)
return -EINVAL;
val->intval = lp8727_is_charger_attached(psy->desc->name, pchg->devid);
return 0;
}
static bool lp8727_is_high_temperature(enum lp8727_die_temp temp)
{
switch (temp) {
case LP8788_TEMP_95C:
case LP8788_TEMP_115C:
case LP8788_TEMP_135C:
return true;
default:
return false;
}
}
static int lp8727_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct lp8727_chg *pchg = dev_get_drvdata(psy->dev.parent);
struct lp8727_platform_data *pdata = pchg->pdata;
enum lp8727_die_temp temp;
u8 read;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
if (!lp8727_is_charger_attached(psy->desc->name, pchg->devid)) {
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
return 0;
}
lp8727_read_byte(pchg, LP8727_STATUS1, &read);
val->intval = (read & LP8727_CHGSTAT) == LP8727_STAT_EOC ?
POWER_SUPPLY_STATUS_FULL :
POWER_SUPPLY_STATUS_CHARGING;
break;
case POWER_SUPPLY_PROP_HEALTH:
lp8727_read_byte(pchg, LP8727_STATUS2, &read);
temp = (read & LP8727_TEMP_STAT) >> LP8727_TEMP_SHIFT;
val->intval = lp8727_is_high_temperature(temp) ?
POWER_SUPPLY_HEALTH_OVERHEAT :
POWER_SUPPLY_HEALTH_GOOD;
break;
case POWER_SUPPLY_PROP_PRESENT:
if (!pdata)
return -EINVAL;
if (pdata->get_batt_present)
val->intval = pdata->get_batt_present();
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
if (!pdata)
return -EINVAL;
if (pdata->get_batt_level)
val->intval = pdata->get_batt_level();
break;
case POWER_SUPPLY_PROP_CAPACITY:
if (!pdata)
return -EINVAL;
if (pdata->get_batt_capacity)
val->intval = pdata->get_batt_capacity();
break;
case POWER_SUPPLY_PROP_TEMP:
if (!pdata)
return -EINVAL;
if (pdata->get_batt_temp)
val->intval = pdata->get_batt_temp();
break;
default:
break;
}
return 0;
}
static void lp8727_charger_changed(struct power_supply *psy)
{
struct lp8727_chg *pchg = dev_get_drvdata(psy->dev.parent);
u8 eoc_level;
u8 ichg;
u8 val;
/* skip if no charger exists */
if (!lp8727_is_charger_attached(psy->desc->name, pchg->devid))
return;
/* update charging parameters */
if (pchg->chg_param) {
eoc_level = pchg->chg_param->eoc_level;
ichg = pchg->chg_param->ichg;
val = (ichg << LP8727_ICHG_SHIFT) | eoc_level;
lp8727_write_byte(pchg, LP8727_CHGCTRL2, val);
}
}
static const struct power_supply_desc lp8727_ac_desc = {
.name = "ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = lp8727_charger_prop,
.num_properties = ARRAY_SIZE(lp8727_charger_prop),
.get_property = lp8727_charger_get_property,
};
static const struct power_supply_desc lp8727_usb_desc = {
.name = "usb",
.type = POWER_SUPPLY_TYPE_USB,
.properties = lp8727_charger_prop,
.num_properties = ARRAY_SIZE(lp8727_charger_prop),
.get_property = lp8727_charger_get_property,
};
static const struct power_supply_desc lp8727_batt_desc = {
.name = "main_batt",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = lp8727_battery_prop,
.num_properties = ARRAY_SIZE(lp8727_battery_prop),
.get_property = lp8727_battery_get_property,
.external_power_changed = lp8727_charger_changed,
};
static int lp8727_register_psy(struct lp8727_chg *pchg)
{
struct power_supply_config psy_cfg = {}; /* Only for ac and usb */
struct lp8727_psy *psy;
psy = devm_kzalloc(pchg->dev, sizeof(*psy), GFP_KERNEL);
if (!psy)
return -ENOMEM;
pchg->psy = psy;
psy_cfg.supplied_to = battery_supplied_to;
psy_cfg.num_supplicants = ARRAY_SIZE(battery_supplied_to);
psy->ac = power_supply_register(pchg->dev, &lp8727_ac_desc, &psy_cfg);
if (IS_ERR(psy->ac))
goto err_psy_ac;
psy->usb = power_supply_register(pchg->dev, &lp8727_usb_desc,
&psy_cfg);
if (IS_ERR(psy->usb))
goto err_psy_usb;
psy->batt = power_supply_register(pchg->dev, &lp8727_batt_desc, NULL);
if (IS_ERR(psy->batt))
goto err_psy_batt;
return 0;
err_psy_batt:
power_supply_unregister(psy->usb);
err_psy_usb:
power_supply_unregister(psy->ac);
err_psy_ac:
return -EPERM;
}
static void lp8727_unregister_psy(struct lp8727_chg *pchg)
{
struct lp8727_psy *psy = pchg->psy;
if (!psy)
return;
power_supply_unregister(psy->ac);
power_supply_unregister(psy->usb);
power_supply_unregister(psy->batt);
}
#ifdef CONFIG_OF
static struct lp8727_chg_param
*lp8727_parse_charge_pdata(struct device *dev, struct device_node *np)
{
struct lp8727_chg_param *param;
param = devm_kzalloc(dev, sizeof(*param), GFP_KERNEL);
if (!param)
goto out;
of_property_read_u8(np, "eoc-level", (u8 *)¶m->eoc_level);
of_property_read_u8(np, "charging-current", (u8 *)¶m->ichg);
out:
return param;
}
static struct lp8727_platform_data *lp8727_parse_dt(struct device *dev)
{
struct device_node *np = dev->of_node;
struct device_node *child;
struct lp8727_platform_data *pdata;
const char *type;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
of_property_read_u32(np, "debounce-ms", &pdata->debounce_msec);
/* If charging parameter is not defined, just skip parsing the dt */
if (of_get_child_count(np) == 0)
return pdata;
for_each_child_of_node(np, child) {
of_property_read_string(child, "charger-type", &type);
if (!strcmp(type, "ac"))
pdata->ac = lp8727_parse_charge_pdata(dev, child);
if (!strcmp(type, "usb"))
pdata->usb = lp8727_parse_charge_pdata(dev, child);
}
return pdata;
}
#else
static struct lp8727_platform_data *lp8727_parse_dt(struct device *dev)
{
return NULL;
}
#endif
static int lp8727_probe(struct i2c_client *cl)
{
struct lp8727_chg *pchg;
struct lp8727_platform_data *pdata;
int ret;
if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
return -EIO;
if (cl->dev.of_node) {
pdata = lp8727_parse_dt(&cl->dev);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
} else {
pdata = dev_get_platdata(&cl->dev);
}
pchg = devm_kzalloc(&cl->dev, sizeof(*pchg), GFP_KERNEL);
if (!pchg)
return -ENOMEM;
pchg->client = cl;
pchg->dev = &cl->dev;
pchg->pdata = pdata;
i2c_set_clientdata(cl, pchg);
mutex_init(&pchg->xfer_lock);
ret = lp8727_init_device(pchg);
if (ret) {
dev_err(pchg->dev, "i2c communication err: %d", ret);
return ret;
}
ret = lp8727_register_psy(pchg);
if (ret) {
dev_err(pchg->dev, "power supplies register err: %d", ret);
return ret;
}
ret = lp8727_setup_irq(pchg);
if (ret) {
dev_err(pchg->dev, "irq handler err: %d", ret);
lp8727_unregister_psy(pchg);
return ret;
}
return 0;
}
static void lp8727_remove(struct i2c_client *cl)
{
struct lp8727_chg *pchg = i2c_get_clientdata(cl);
lp8727_release_irq(pchg);
lp8727_unregister_psy(pchg);
}
static const struct of_device_id lp8727_dt_ids[] __maybe_unused = {
{ .compatible = "ti,lp8727", },
{ }
};
MODULE_DEVICE_TABLE(of, lp8727_dt_ids);
static const struct i2c_device_id lp8727_ids[] = {
{"lp8727", 0},
{ }
};
MODULE_DEVICE_TABLE(i2c, lp8727_ids);
static struct i2c_driver lp8727_driver = {
.driver = {
.name = "lp8727",
.of_match_table = of_match_ptr(lp8727_dt_ids),
},
.probe = lp8727_probe,
.remove = lp8727_remove,
.id_table = lp8727_ids,
};
module_i2c_driver(lp8727_driver);
MODULE_DESCRIPTION("TI/National Semiconductor LP8727 charger driver");
MODULE_AUTHOR("Milo Kim <[email protected]>, Daniel Jeong <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/lp8727_charger.c |
// SPDX-License-Identifier: GPL-2.0
//
// max17040_battery.c
// fuel-gauge systems for lithium-ion (Li+) batteries
//
// Copyright (C) 2009 Samsung Electronics
// Minkyu Kang <[email protected]>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/power_supply.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#define MAX17040_VCELL 0x02
#define MAX17040_SOC 0x04
#define MAX17040_MODE 0x06
#define MAX17040_VER 0x08
#define MAX17040_CONFIG 0x0C
#define MAX17040_STATUS 0x1A
#define MAX17040_CMD 0xFE
#define MAX17040_DELAY 1000
#define MAX17040_BATTERY_FULL 95
#define MAX17040_RCOMP_DEFAULT 0x9700
#define MAX17040_ATHD_MASK 0x3f
#define MAX17040_ALSC_MASK 0x40
#define MAX17040_ATHD_DEFAULT_POWER_UP 4
#define MAX17040_STATUS_HD_MASK 0x1000
#define MAX17040_STATUS_SC_MASK 0x2000
#define MAX17040_CFG_RCOMP_MASK 0xff00
enum chip_id {
ID_MAX17040,
ID_MAX17041,
ID_MAX17043,
ID_MAX17044,
ID_MAX17048,
ID_MAX17049,
ID_MAX17058,
ID_MAX17059,
};
/* values that differ by chip_id */
struct chip_data {
u16 reset_val;
u16 vcell_shift;
u16 vcell_mul;
u16 vcell_div;
u8 has_low_soc_alert;
u8 rcomp_bytes;
u8 has_soc_alert;
};
static struct chip_data max17040_family[] = {
[ID_MAX17040] = {
.reset_val = 0x0054,
.vcell_shift = 4,
.vcell_mul = 1250,
.vcell_div = 1,
.has_low_soc_alert = 0,
.rcomp_bytes = 2,
.has_soc_alert = 0,
},
[ID_MAX17041] = {
.reset_val = 0x0054,
.vcell_shift = 4,
.vcell_mul = 2500,
.vcell_div = 1,
.has_low_soc_alert = 0,
.rcomp_bytes = 2,
.has_soc_alert = 0,
},
[ID_MAX17043] = {
.reset_val = 0x0054,
.vcell_shift = 4,
.vcell_mul = 1250,
.vcell_div = 1,
.has_low_soc_alert = 1,
.rcomp_bytes = 1,
.has_soc_alert = 0,
},
[ID_MAX17044] = {
.reset_val = 0x0054,
.vcell_shift = 4,
.vcell_mul = 2500,
.vcell_div = 1,
.has_low_soc_alert = 1,
.rcomp_bytes = 1,
.has_soc_alert = 0,
},
[ID_MAX17048] = {
.reset_val = 0x5400,
.vcell_shift = 0,
.vcell_mul = 625,
.vcell_div = 8,
.has_low_soc_alert = 1,
.rcomp_bytes = 1,
.has_soc_alert = 1,
},
[ID_MAX17049] = {
.reset_val = 0x5400,
.vcell_shift = 0,
.vcell_mul = 625,
.vcell_div = 4,
.has_low_soc_alert = 1,
.rcomp_bytes = 1,
.has_soc_alert = 1,
},
[ID_MAX17058] = {
.reset_val = 0x5400,
.vcell_shift = 0,
.vcell_mul = 625,
.vcell_div = 8,
.has_low_soc_alert = 1,
.rcomp_bytes = 1,
.has_soc_alert = 0,
},
[ID_MAX17059] = {
.reset_val = 0x5400,
.vcell_shift = 0,
.vcell_mul = 625,
.vcell_div = 4,
.has_low_soc_alert = 1,
.rcomp_bytes = 1,
.has_soc_alert = 0,
},
};
struct max17040_chip {
struct i2c_client *client;
struct regmap *regmap;
struct delayed_work work;
struct power_supply *battery;
struct chip_data data;
/* battery capacity */
int soc;
/* Low alert threshold from 32% to 1% of the State of Charge */
u32 low_soc_alert;
/* some devices return twice the capacity */
bool quirk_double_soc;
/* higher 8 bits for 17043+, 16 bits for 17040,41 */
u16 rcomp;
};
static int max17040_reset(struct max17040_chip *chip)
{
return regmap_write(chip->regmap, MAX17040_CMD, chip->data.reset_val);
}
static int max17040_set_low_soc_alert(struct max17040_chip *chip, u32 level)
{
level = 32 - level * (chip->quirk_double_soc ? 2 : 1);
return regmap_update_bits(chip->regmap, MAX17040_CONFIG,
MAX17040_ATHD_MASK, level);
}
static int max17040_set_soc_alert(struct max17040_chip *chip, bool enable)
{
return regmap_update_bits(chip->regmap, MAX17040_CONFIG,
MAX17040_ALSC_MASK, enable ? MAX17040_ALSC_MASK : 0);
}
static int max17040_set_rcomp(struct max17040_chip *chip, u16 rcomp)
{
u16 mask = chip->data.rcomp_bytes == 2 ?
0xffff : MAX17040_CFG_RCOMP_MASK;
return regmap_update_bits(chip->regmap, MAX17040_CONFIG, mask, rcomp);
}
static int max17040_raw_vcell_to_uvolts(struct max17040_chip *chip, u16 vcell)
{
struct chip_data *d = &chip->data;
return (vcell >> d->vcell_shift) * d->vcell_mul / d->vcell_div;
}
static int max17040_get_vcell(struct max17040_chip *chip)
{
u32 vcell;
regmap_read(chip->regmap, MAX17040_VCELL, &vcell);
return max17040_raw_vcell_to_uvolts(chip, vcell);
}
static int max17040_get_soc(struct max17040_chip *chip)
{
u32 soc;
regmap_read(chip->regmap, MAX17040_SOC, &soc);
return soc >> (chip->quirk_double_soc ? 9 : 8);
}
static int max17040_get_version(struct max17040_chip *chip)
{
int ret;
u32 version;
ret = regmap_read(chip->regmap, MAX17040_VER, &version);
return ret ? ret : version;
}
static int max17040_get_online(struct max17040_chip *chip)
{
return 1;
}
static int max17040_get_of_data(struct max17040_chip *chip)
{
struct device *dev = &chip->client->dev;
struct chip_data *data = &max17040_family[
(uintptr_t) of_device_get_match_data(dev)];
int rcomp_len;
u8 rcomp[2];
chip->quirk_double_soc = device_property_read_bool(dev,
"maxim,double-soc");
chip->low_soc_alert = MAX17040_ATHD_DEFAULT_POWER_UP;
device_property_read_u32(dev,
"maxim,alert-low-soc-level",
&chip->low_soc_alert);
if (chip->low_soc_alert <= 0 ||
chip->low_soc_alert > (chip->quirk_double_soc ? 16 : 32)) {
dev_err(dev, "maxim,alert-low-soc-level out of bounds\n");
return -EINVAL;
}
rcomp_len = device_property_count_u8(dev, "maxim,rcomp");
chip->rcomp = MAX17040_RCOMP_DEFAULT;
if (rcomp_len == data->rcomp_bytes) {
if (!device_property_read_u8_array(dev, "maxim,rcomp",
rcomp, rcomp_len))
chip->rcomp = rcomp_len == 2 ? rcomp[0] << 8 | rcomp[1] :
rcomp[0] << 8;
} else if (rcomp_len > 0) {
dev_err(dev, "maxim,rcomp has incorrect length\n");
return -EINVAL;
}
return 0;
}
static void max17040_check_changes(struct max17040_chip *chip)
{
chip->soc = max17040_get_soc(chip);
}
static void max17040_queue_work(struct max17040_chip *chip)
{
queue_delayed_work(system_power_efficient_wq, &chip->work,
MAX17040_DELAY);
}
static void max17040_stop_work(void *data)
{
struct max17040_chip *chip = data;
cancel_delayed_work_sync(&chip->work);
}
static void max17040_work(struct work_struct *work)
{
struct max17040_chip *chip;
int last_soc;
chip = container_of(work, struct max17040_chip, work.work);
/* store SOC to check changes */
last_soc = chip->soc;
max17040_check_changes(chip);
/* check changes and send uevent */
if (last_soc != chip->soc)
power_supply_changed(chip->battery);
max17040_queue_work(chip);
}
/* Returns true if alert cause was SOC change, not low SOC */
static bool max17040_handle_soc_alert(struct max17040_chip *chip)
{
bool ret = true;
u32 data;
regmap_read(chip->regmap, MAX17040_STATUS, &data);
if (data & MAX17040_STATUS_HD_MASK) {
// this alert was caused by low soc
ret = false;
}
if (data & MAX17040_STATUS_SC_MASK) {
// soc change bit -- deassert to mark as handled
regmap_write(chip->regmap, MAX17040_STATUS,
data & ~MAX17040_STATUS_SC_MASK);
}
return ret;
}
static irqreturn_t max17040_thread_handler(int id, void *dev)
{
struct max17040_chip *chip = dev;
if (!(chip->data.has_soc_alert && max17040_handle_soc_alert(chip)))
dev_warn(&chip->client->dev, "IRQ: Alert battery low level\n");
/* read registers */
max17040_check_changes(chip);
/* send uevent */
power_supply_changed(chip->battery);
/* reset alert bit */
max17040_set_low_soc_alert(chip, chip->low_soc_alert);
return IRQ_HANDLED;
}
static int max17040_enable_alert_irq(struct max17040_chip *chip)
{
struct i2c_client *client = chip->client;
int ret;
ret = devm_request_threaded_irq(&client->dev, client->irq, NULL,
max17040_thread_handler, IRQF_ONESHOT,
chip->battery->desc->name, chip);
return ret;
}
static int max17040_prop_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
return 1;
default:
return 0;
}
}
static int max17040_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct max17040_chip *chip = power_supply_get_drvdata(psy);
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
/* alert threshold can be programmed from 1% up to 16/32% */
if ((val->intval < 1) ||
(val->intval > (chip->quirk_double_soc ? 16 : 32))) {
ret = -EINVAL;
break;
}
ret = max17040_set_low_soc_alert(chip, val->intval);
chip->low_soc_alert = val->intval;
break;
default:
ret = -EINVAL;
}
return ret;
}
static int max17040_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct max17040_chip *chip = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = max17040_get_online(chip);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = max17040_get_vcell(chip);
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = max17040_get_soc(chip);
break;
case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
val->intval = chip->low_soc_alert;
break;
default:
return -EINVAL;
}
return 0;
}
static const struct regmap_config max17040_regmap = {
.reg_bits = 8,
.reg_stride = 2,
.val_bits = 16,
.val_format_endian = REGMAP_ENDIAN_BIG,
};
static enum power_supply_property max17040_battery_props[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN,
};
static const struct power_supply_desc max17040_battery_desc = {
.name = "battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.get_property = max17040_get_property,
.set_property = max17040_set_property,
.property_is_writeable = max17040_prop_writeable,
.properties = max17040_battery_props,
.num_properties = ARRAY_SIZE(max17040_battery_props),
};
static int max17040_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct i2c_adapter *adapter = client->adapter;
struct power_supply_config psy_cfg = {};
struct max17040_chip *chip;
enum chip_id chip_id;
bool enable_irq = false;
int ret;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
return -EIO;
chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->client = client;
chip->regmap = devm_regmap_init_i2c(client, &max17040_regmap);
if (IS_ERR(chip->regmap))
return PTR_ERR(chip->regmap);
chip_id = (enum chip_id) id->driver_data;
if (client->dev.of_node) {
ret = max17040_get_of_data(chip);
if (ret)
return ret;
chip_id = (uintptr_t)of_device_get_match_data(&client->dev);
}
chip->data = max17040_family[chip_id];
i2c_set_clientdata(client, chip);
psy_cfg.drv_data = chip;
chip->battery = devm_power_supply_register(&client->dev,
&max17040_battery_desc, &psy_cfg);
if (IS_ERR(chip->battery)) {
dev_err(&client->dev, "failed: power supply register\n");
return PTR_ERR(chip->battery);
}
ret = max17040_get_version(chip);
if (ret < 0)
return ret;
dev_dbg(&chip->client->dev, "MAX17040 Fuel-Gauge Ver 0x%x\n", ret);
if (chip_id == ID_MAX17040 || chip_id == ID_MAX17041)
max17040_reset(chip);
max17040_set_rcomp(chip, chip->rcomp);
/* check interrupt */
if (client->irq && chip->data.has_low_soc_alert) {
ret = max17040_set_low_soc_alert(chip, chip->low_soc_alert);
if (ret) {
dev_err(&client->dev,
"Failed to set low SOC alert: err %d\n", ret);
return ret;
}
enable_irq = true;
}
if (client->irq && chip->data.has_soc_alert) {
ret = max17040_set_soc_alert(chip, 1);
if (ret) {
dev_err(&client->dev,
"Failed to set SOC alert: err %d\n", ret);
return ret;
}
enable_irq = true;
} else {
/* soc alerts negate the need for polling */
INIT_DEFERRABLE_WORK(&chip->work, max17040_work);
ret = devm_add_action(&client->dev, max17040_stop_work, chip);
if (ret)
return ret;
max17040_queue_work(chip);
}
if (enable_irq) {
ret = max17040_enable_alert_irq(chip);
if (ret) {
client->irq = 0;
dev_warn(&client->dev,
"Failed to get IRQ err %d\n", ret);
}
}
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int max17040_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct max17040_chip *chip = i2c_get_clientdata(client);
if (client->irq && chip->data.has_soc_alert)
// disable soc alert to prevent wakeup
max17040_set_soc_alert(chip, 0);
else
cancel_delayed_work(&chip->work);
if (client->irq && device_may_wakeup(dev))
enable_irq_wake(client->irq);
return 0;
}
static int max17040_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct max17040_chip *chip = i2c_get_clientdata(client);
if (client->irq && device_may_wakeup(dev))
disable_irq_wake(client->irq);
if (client->irq && chip->data.has_soc_alert)
max17040_set_soc_alert(chip, 1);
else
max17040_queue_work(chip);
return 0;
}
static SIMPLE_DEV_PM_OPS(max17040_pm_ops, max17040_suspend, max17040_resume);
#define MAX17040_PM_OPS (&max17040_pm_ops)
#else
#define MAX17040_PM_OPS NULL
#endif /* CONFIG_PM_SLEEP */
static const struct i2c_device_id max17040_id[] = {
{ "max17040", ID_MAX17040 },
{ "max17041", ID_MAX17041 },
{ "max17043", ID_MAX17043 },
{ "max77836-battery", ID_MAX17043 },
{ "max17044", ID_MAX17044 },
{ "max17048", ID_MAX17048 },
{ "max17049", ID_MAX17049 },
{ "max17058", ID_MAX17058 },
{ "max17059", ID_MAX17059 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(i2c, max17040_id);
static const struct of_device_id max17040_of_match[] = {
{ .compatible = "maxim,max17040", .data = (void *) ID_MAX17040 },
{ .compatible = "maxim,max17041", .data = (void *) ID_MAX17041 },
{ .compatible = "maxim,max17043", .data = (void *) ID_MAX17043 },
{ .compatible = "maxim,max77836-battery", .data = (void *) ID_MAX17043 },
{ .compatible = "maxim,max17044", .data = (void *) ID_MAX17044 },
{ .compatible = "maxim,max17048", .data = (void *) ID_MAX17048 },
{ .compatible = "maxim,max17049", .data = (void *) ID_MAX17049 },
{ .compatible = "maxim,max17058", .data = (void *) ID_MAX17058 },
{ .compatible = "maxim,max17059", .data = (void *) ID_MAX17059 },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, max17040_of_match);
static struct i2c_driver max17040_i2c_driver = {
.driver = {
.name = "max17040",
.of_match_table = max17040_of_match,
.pm = MAX17040_PM_OPS,
},
.probe = max17040_probe,
.id_table = max17040_id,
};
module_i2c_driver(max17040_i2c_driver);
MODULE_AUTHOR("Minkyu Kang <[email protected]>");
MODULE_DESCRIPTION("MAX17040 Fuel Gauge");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/max17040_battery.c |
// SPDX-License-Identifier: GPL-2.0+
/*
* Battery driver for 7th-generation Microsoft Surface devices via Surface
* System Aggregator Module (SSAM).
*
* Copyright (C) 2019-2021 Maximilian Luz <[email protected]>
*/
#include <asm/unaligned.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/power_supply.h>
#include <linux/sysfs.h>
#include <linux/types.h>
#include <linux/workqueue.h>
#include <linux/surface_aggregator/device.h>
/* -- SAM interface. -------------------------------------------------------- */
enum sam_event_cid_bat {
SAM_EVENT_CID_BAT_BIX = 0x15,
SAM_EVENT_CID_BAT_BST = 0x16,
SAM_EVENT_CID_BAT_ADP = 0x17,
SAM_EVENT_CID_BAT_PROT = 0x18,
SAM_EVENT_CID_BAT_DPTF = 0x53,
};
enum sam_battery_sta {
SAM_BATTERY_STA_OK = 0x0f,
SAM_BATTERY_STA_PRESENT = 0x10,
};
enum sam_battery_state {
SAM_BATTERY_STATE_DISCHARGING = BIT(0),
SAM_BATTERY_STATE_CHARGING = BIT(1),
SAM_BATTERY_STATE_CRITICAL = BIT(2),
};
enum sam_battery_power_unit {
SAM_BATTERY_POWER_UNIT_mW = 0,
SAM_BATTERY_POWER_UNIT_mA = 1,
};
/* Equivalent to data returned in ACPI _BIX method, revision 0. */
struct spwr_bix {
u8 revision;
__le32 power_unit;
__le32 design_cap;
__le32 last_full_charge_cap;
__le32 technology;
__le32 design_voltage;
__le32 design_cap_warn;
__le32 design_cap_low;
__le32 cycle_count;
__le32 measurement_accuracy;
__le32 max_sampling_time;
__le32 min_sampling_time;
__le32 max_avg_interval;
__le32 min_avg_interval;
__le32 bat_cap_granularity_1;
__le32 bat_cap_granularity_2;
__u8 model[21];
__u8 serial[11];
__u8 type[5];
__u8 oem_info[21];
} __packed;
static_assert(sizeof(struct spwr_bix) == 119);
/* Equivalent to data returned in ACPI _BST method. */
struct spwr_bst {
__le32 state;
__le32 present_rate;
__le32 remaining_cap;
__le32 present_voltage;
} __packed;
static_assert(sizeof(struct spwr_bst) == 16);
#define SPWR_BIX_REVISION 0
#define SPWR_BATTERY_VALUE_UNKNOWN 0xffffffff
/* Get battery status (_STA) */
SSAM_DEFINE_SYNC_REQUEST_CL_R(ssam_bat_get_sta, __le32, {
.target_category = SSAM_SSH_TC_BAT,
.command_id = 0x01,
});
/* Get battery static information (_BIX). */
SSAM_DEFINE_SYNC_REQUEST_CL_R(ssam_bat_get_bix, struct spwr_bix, {
.target_category = SSAM_SSH_TC_BAT,
.command_id = 0x02,
});
/* Get battery dynamic information (_BST). */
SSAM_DEFINE_SYNC_REQUEST_CL_R(ssam_bat_get_bst, struct spwr_bst, {
.target_category = SSAM_SSH_TC_BAT,
.command_id = 0x03,
});
/* Set battery trip point (_BTP). */
SSAM_DEFINE_SYNC_REQUEST_CL_W(ssam_bat_set_btp, __le32, {
.target_category = SSAM_SSH_TC_BAT,
.command_id = 0x04,
});
/* -- Device structures. ---------------------------------------------------- */
struct spwr_psy_properties {
const char *name;
struct ssam_event_registry registry;
};
struct spwr_battery_device {
struct ssam_device *sdev;
char name[32];
struct power_supply *psy;
struct power_supply_desc psy_desc;
struct delayed_work update_work;
struct ssam_event_notifier notif;
struct mutex lock; /* Guards access to state data below. */
unsigned long timestamp;
__le32 sta;
struct spwr_bix bix;
struct spwr_bst bst;
u32 alarm;
};
/* -- Module parameters. ---------------------------------------------------- */
static unsigned int cache_time = 1000;
module_param(cache_time, uint, 0644);
MODULE_PARM_DESC(cache_time, "battery state caching time in milliseconds [default: 1000]");
/* -- State management. ----------------------------------------------------- */
/*
* Delay for battery update quirk. See spwr_external_power_changed() below
* for more details.
*/
#define SPWR_AC_BAT_UPDATE_DELAY msecs_to_jiffies(5000)
static bool spwr_battery_present(struct spwr_battery_device *bat)
{
lockdep_assert_held(&bat->lock);
return le32_to_cpu(bat->sta) & SAM_BATTERY_STA_PRESENT;
}
static int spwr_battery_load_sta(struct spwr_battery_device *bat)
{
lockdep_assert_held(&bat->lock);
return ssam_retry(ssam_bat_get_sta, bat->sdev, &bat->sta);
}
static int spwr_battery_load_bix(struct spwr_battery_device *bat)
{
int status;
lockdep_assert_held(&bat->lock);
if (!spwr_battery_present(bat))
return 0;
status = ssam_retry(ssam_bat_get_bix, bat->sdev, &bat->bix);
/* Enforce NULL terminated strings in case anything goes wrong... */
bat->bix.model[ARRAY_SIZE(bat->bix.model) - 1] = 0;
bat->bix.serial[ARRAY_SIZE(bat->bix.serial) - 1] = 0;
bat->bix.type[ARRAY_SIZE(bat->bix.type) - 1] = 0;
bat->bix.oem_info[ARRAY_SIZE(bat->bix.oem_info) - 1] = 0;
return status;
}
static int spwr_battery_load_bst(struct spwr_battery_device *bat)
{
lockdep_assert_held(&bat->lock);
if (!spwr_battery_present(bat))
return 0;
return ssam_retry(ssam_bat_get_bst, bat->sdev, &bat->bst);
}
static int spwr_battery_set_alarm_unlocked(struct spwr_battery_device *bat, u32 value)
{
__le32 value_le = cpu_to_le32(value);
lockdep_assert_held(&bat->lock);
bat->alarm = value;
return ssam_retry(ssam_bat_set_btp, bat->sdev, &value_le);
}
static int spwr_battery_update_bst_unlocked(struct spwr_battery_device *bat, bool cached)
{
unsigned long cache_deadline = bat->timestamp + msecs_to_jiffies(cache_time);
int status;
lockdep_assert_held(&bat->lock);
if (cached && bat->timestamp && time_is_after_jiffies(cache_deadline))
return 0;
status = spwr_battery_load_sta(bat);
if (status)
return status;
status = spwr_battery_load_bst(bat);
if (status)
return status;
bat->timestamp = jiffies;
return 0;
}
static int spwr_battery_update_bst(struct spwr_battery_device *bat, bool cached)
{
int status;
mutex_lock(&bat->lock);
status = spwr_battery_update_bst_unlocked(bat, cached);
mutex_unlock(&bat->lock);
return status;
}
static int spwr_battery_update_bix_unlocked(struct spwr_battery_device *bat)
{
int status;
lockdep_assert_held(&bat->lock);
status = spwr_battery_load_sta(bat);
if (status)
return status;
status = spwr_battery_load_bix(bat);
if (status)
return status;
status = spwr_battery_load_bst(bat);
if (status)
return status;
if (bat->bix.revision != SPWR_BIX_REVISION)
dev_warn(&bat->sdev->dev, "unsupported battery revision: %u\n", bat->bix.revision);
bat->timestamp = jiffies;
return 0;
}
static u32 sprw_battery_get_full_cap_safe(struct spwr_battery_device *bat)
{
u32 full_cap = get_unaligned_le32(&bat->bix.last_full_charge_cap);
lockdep_assert_held(&bat->lock);
if (full_cap == 0 || full_cap == SPWR_BATTERY_VALUE_UNKNOWN)
full_cap = get_unaligned_le32(&bat->bix.design_cap);
return full_cap;
}
static bool spwr_battery_is_full(struct spwr_battery_device *bat)
{
u32 state = get_unaligned_le32(&bat->bst.state);
u32 full_cap = sprw_battery_get_full_cap_safe(bat);
u32 remaining_cap = get_unaligned_le32(&bat->bst.remaining_cap);
lockdep_assert_held(&bat->lock);
return full_cap != SPWR_BATTERY_VALUE_UNKNOWN && full_cap != 0 &&
remaining_cap != SPWR_BATTERY_VALUE_UNKNOWN &&
remaining_cap >= full_cap &&
state == 0;
}
static int spwr_battery_recheck_full(struct spwr_battery_device *bat)
{
bool present;
u32 unit;
int status;
mutex_lock(&bat->lock);
unit = get_unaligned_le32(&bat->bix.power_unit);
present = spwr_battery_present(bat);
status = spwr_battery_update_bix_unlocked(bat);
if (status)
goto out;
/* If battery has been attached, (re-)initialize alarm. */
if (!present && spwr_battery_present(bat)) {
u32 cap_warn = get_unaligned_le32(&bat->bix.design_cap_warn);
status = spwr_battery_set_alarm_unlocked(bat, cap_warn);
if (status)
goto out;
}
/*
* Warn if the unit has changed. This is something we genuinely don't
* expect to happen, so make this a big warning. If it does, we'll
* need to add support for it.
*/
WARN_ON(unit != get_unaligned_le32(&bat->bix.power_unit));
out:
mutex_unlock(&bat->lock);
if (!status)
power_supply_changed(bat->psy);
return status;
}
static int spwr_battery_recheck_status(struct spwr_battery_device *bat)
{
int status;
status = spwr_battery_update_bst(bat, false);
if (!status)
power_supply_changed(bat->psy);
return status;
}
static u32 spwr_notify_bat(struct ssam_event_notifier *nf, const struct ssam_event *event)
{
struct spwr_battery_device *bat = container_of(nf, struct spwr_battery_device, notif);
int status;
/*
* We cannot use strict matching when registering the notifier as the
* EC expects us to register it against instance ID 0. Strict matching
* would thus drop events, as those may have non-zero instance IDs in
* this subsystem. So we need to check the instance ID of the event
* here manually.
*/
if (event->instance_id != bat->sdev->uid.instance)
return 0;
dev_dbg(&bat->sdev->dev, "power event (cid = %#04x, iid = %#04x, tid = %#04x)\n",
event->command_id, event->instance_id, event->target_id);
switch (event->command_id) {
case SAM_EVENT_CID_BAT_BIX:
status = spwr_battery_recheck_full(bat);
break;
case SAM_EVENT_CID_BAT_BST:
status = spwr_battery_recheck_status(bat);
break;
case SAM_EVENT_CID_BAT_PROT:
/*
* TODO: Implement support for battery protection status change
* event.
*/
status = 0;
break;
case SAM_EVENT_CID_BAT_DPTF:
/*
* TODO: Implement support for DPTF event.
*/
status = 0;
break;
default:
return 0;
}
return ssam_notifier_from_errno(status) | SSAM_NOTIF_HANDLED;
}
static void spwr_battery_update_bst_workfn(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct spwr_battery_device *bat;
int status;
bat = container_of(dwork, struct spwr_battery_device, update_work);
status = spwr_battery_update_bst(bat, false);
if (status) {
dev_err(&bat->sdev->dev, "failed to update battery state: %d\n", status);
return;
}
power_supply_changed(bat->psy);
}
static void spwr_external_power_changed(struct power_supply *psy)
{
struct spwr_battery_device *bat = power_supply_get_drvdata(psy);
/*
* Handle battery update quirk: When the battery is fully charged (or
* charged up to the limit imposed by the UEFI battery limit) and the
* adapter is plugged in or removed, the EC does not send a separate
* event for the state (charging/discharging) change. Furthermore it
* may take some time until the state is updated on the battery.
* Schedule an update to solve this.
*/
schedule_delayed_work(&bat->update_work, SPWR_AC_BAT_UPDATE_DELAY);
}
/* -- Properties. ----------------------------------------------------------- */
static const enum power_supply_property spwr_battery_props_chg[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
};
static const enum power_supply_property spwr_battery_props_eng[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_POWER_NOW,
POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
POWER_SUPPLY_PROP_ENERGY_FULL,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
};
static int spwr_battery_prop_status(struct spwr_battery_device *bat)
{
u32 state = get_unaligned_le32(&bat->bst.state);
u32 present_rate = get_unaligned_le32(&bat->bst.present_rate);
lockdep_assert_held(&bat->lock);
if (state & SAM_BATTERY_STATE_DISCHARGING)
return POWER_SUPPLY_STATUS_DISCHARGING;
if (state & SAM_BATTERY_STATE_CHARGING)
return POWER_SUPPLY_STATUS_CHARGING;
if (spwr_battery_is_full(bat))
return POWER_SUPPLY_STATUS_FULL;
if (present_rate == 0)
return POWER_SUPPLY_STATUS_NOT_CHARGING;
return POWER_SUPPLY_STATUS_UNKNOWN;
}
static int spwr_battery_prop_technology(struct spwr_battery_device *bat)
{
lockdep_assert_held(&bat->lock);
if (!strcasecmp("NiCd", bat->bix.type))
return POWER_SUPPLY_TECHNOLOGY_NiCd;
if (!strcasecmp("NiMH", bat->bix.type))
return POWER_SUPPLY_TECHNOLOGY_NiMH;
if (!strcasecmp("LION", bat->bix.type))
return POWER_SUPPLY_TECHNOLOGY_LION;
if (!strncasecmp("LI-ION", bat->bix.type, 6))
return POWER_SUPPLY_TECHNOLOGY_LION;
if (!strcasecmp("LiP", bat->bix.type))
return POWER_SUPPLY_TECHNOLOGY_LIPO;
return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
}
static int spwr_battery_prop_capacity(struct spwr_battery_device *bat)
{
u32 full_cap = sprw_battery_get_full_cap_safe(bat);
u32 remaining_cap = get_unaligned_le32(&bat->bst.remaining_cap);
lockdep_assert_held(&bat->lock);
if (full_cap == 0 || full_cap == SPWR_BATTERY_VALUE_UNKNOWN)
return -ENODATA;
if (remaining_cap == SPWR_BATTERY_VALUE_UNKNOWN)
return -ENODATA;
return remaining_cap * 100 / full_cap;
}
static int spwr_battery_prop_capacity_level(struct spwr_battery_device *bat)
{
u32 state = get_unaligned_le32(&bat->bst.state);
u32 remaining_cap = get_unaligned_le32(&bat->bst.remaining_cap);
lockdep_assert_held(&bat->lock);
if (state & SAM_BATTERY_STATE_CRITICAL)
return POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
if (spwr_battery_is_full(bat))
return POWER_SUPPLY_CAPACITY_LEVEL_FULL;
if (remaining_cap <= bat->alarm)
return POWER_SUPPLY_CAPACITY_LEVEL_LOW;
return POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
}
static int spwr_battery_get_property(struct power_supply *psy, enum power_supply_property psp,
union power_supply_propval *val)
{
struct spwr_battery_device *bat = power_supply_get_drvdata(psy);
u32 value;
int status;
mutex_lock(&bat->lock);
status = spwr_battery_update_bst_unlocked(bat, true);
if (status)
goto out;
/* Abort if battery is not present. */
if (!spwr_battery_present(bat) && psp != POWER_SUPPLY_PROP_PRESENT) {
status = -ENODEV;
goto out;
}
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
val->intval = spwr_battery_prop_status(bat);
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = spwr_battery_present(bat);
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = spwr_battery_prop_technology(bat);
break;
case POWER_SUPPLY_PROP_CYCLE_COUNT:
value = get_unaligned_le32(&bat->bix.cycle_count);
if (value != SPWR_BATTERY_VALUE_UNKNOWN)
val->intval = value;
else
status = -ENODATA;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
value = get_unaligned_le32(&bat->bix.design_voltage);
if (value != SPWR_BATTERY_VALUE_UNKNOWN)
val->intval = value * 1000;
else
status = -ENODATA;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
value = get_unaligned_le32(&bat->bst.present_voltage);
if (value != SPWR_BATTERY_VALUE_UNKNOWN)
val->intval = value * 1000;
else
status = -ENODATA;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
case POWER_SUPPLY_PROP_POWER_NOW:
value = get_unaligned_le32(&bat->bst.present_rate);
if (value != SPWR_BATTERY_VALUE_UNKNOWN)
val->intval = value * 1000;
else
status = -ENODATA;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
value = get_unaligned_le32(&bat->bix.design_cap);
if (value != SPWR_BATTERY_VALUE_UNKNOWN)
val->intval = value * 1000;
else
status = -ENODATA;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
case POWER_SUPPLY_PROP_ENERGY_FULL:
value = get_unaligned_le32(&bat->bix.last_full_charge_cap);
if (value != SPWR_BATTERY_VALUE_UNKNOWN)
val->intval = value * 1000;
else
status = -ENODATA;
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
case POWER_SUPPLY_PROP_ENERGY_NOW:
value = get_unaligned_le32(&bat->bst.remaining_cap);
if (value != SPWR_BATTERY_VALUE_UNKNOWN)
val->intval = value * 1000;
else
status = -ENODATA;
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = spwr_battery_prop_capacity(bat);
break;
case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
val->intval = spwr_battery_prop_capacity_level(bat);
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = bat->bix.model;
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = bat->bix.oem_info;
break;
case POWER_SUPPLY_PROP_SERIAL_NUMBER:
val->strval = bat->bix.serial;
break;
default:
status = -EINVAL;
break;
}
out:
mutex_unlock(&bat->lock);
return status;
}
/* -- Alarm attribute. ------------------------------------------------------ */
static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct power_supply *psy = dev_get_drvdata(dev);
struct spwr_battery_device *bat = power_supply_get_drvdata(psy);
int status;
mutex_lock(&bat->lock);
status = sysfs_emit(buf, "%d\n", bat->alarm * 1000);
mutex_unlock(&bat->lock);
return status;
}
static ssize_t alarm_store(struct device *dev, struct device_attribute *attr, const char *buf,
size_t count)
{
struct power_supply *psy = dev_get_drvdata(dev);
struct spwr_battery_device *bat = power_supply_get_drvdata(psy);
unsigned long value;
int status;
status = kstrtoul(buf, 0, &value);
if (status)
return status;
mutex_lock(&bat->lock);
if (!spwr_battery_present(bat)) {
mutex_unlock(&bat->lock);
return -ENODEV;
}
status = spwr_battery_set_alarm_unlocked(bat, value / 1000);
if (status) {
mutex_unlock(&bat->lock);
return status;
}
mutex_unlock(&bat->lock);
return count;
}
static DEVICE_ATTR_RW(alarm);
static struct attribute *spwr_battery_attrs[] = {
&dev_attr_alarm.attr,
NULL,
};
ATTRIBUTE_GROUPS(spwr_battery);
/* -- Device setup. --------------------------------------------------------- */
static void spwr_battery_init(struct spwr_battery_device *bat, struct ssam_device *sdev,
struct ssam_event_registry registry, const char *name)
{
mutex_init(&bat->lock);
strncpy(bat->name, name, ARRAY_SIZE(bat->name) - 1);
bat->sdev = sdev;
bat->notif.base.priority = 1;
bat->notif.base.fn = spwr_notify_bat;
bat->notif.event.reg = registry;
bat->notif.event.id.target_category = sdev->uid.category;
bat->notif.event.id.instance = 0; /* need to register with instance 0 */
bat->notif.event.mask = SSAM_EVENT_MASK_TARGET;
bat->notif.event.flags = SSAM_EVENT_SEQUENCED;
bat->psy_desc.name = bat->name;
bat->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY;
bat->psy_desc.get_property = spwr_battery_get_property;
INIT_DELAYED_WORK(&bat->update_work, spwr_battery_update_bst_workfn);
}
static int spwr_battery_register(struct spwr_battery_device *bat)
{
struct power_supply_config psy_cfg = {};
__le32 sta;
int status;
/* Make sure the device is there and functioning properly. */
status = ssam_retry(ssam_bat_get_sta, bat->sdev, &sta);
if (status)
return status;
if ((le32_to_cpu(sta) & SAM_BATTERY_STA_OK) != SAM_BATTERY_STA_OK)
return -ENODEV;
/* Satisfy lockdep although we are in an exclusive context here. */
mutex_lock(&bat->lock);
status = spwr_battery_update_bix_unlocked(bat);
if (status) {
mutex_unlock(&bat->lock);
return status;
}
if (spwr_battery_present(bat)) {
u32 cap_warn = get_unaligned_le32(&bat->bix.design_cap_warn);
status = spwr_battery_set_alarm_unlocked(bat, cap_warn);
if (status) {
mutex_unlock(&bat->lock);
return status;
}
}
mutex_unlock(&bat->lock);
bat->psy_desc.external_power_changed = spwr_external_power_changed;
switch (get_unaligned_le32(&bat->bix.power_unit)) {
case SAM_BATTERY_POWER_UNIT_mW:
bat->psy_desc.properties = spwr_battery_props_eng;
bat->psy_desc.num_properties = ARRAY_SIZE(spwr_battery_props_eng);
break;
case SAM_BATTERY_POWER_UNIT_mA:
bat->psy_desc.properties = spwr_battery_props_chg;
bat->psy_desc.num_properties = ARRAY_SIZE(spwr_battery_props_chg);
break;
default:
dev_err(&bat->sdev->dev, "unsupported battery power unit: %u\n",
get_unaligned_le32(&bat->bix.power_unit));
return -EINVAL;
}
psy_cfg.drv_data = bat;
psy_cfg.attr_grp = spwr_battery_groups;
bat->psy = devm_power_supply_register(&bat->sdev->dev, &bat->psy_desc, &psy_cfg);
if (IS_ERR(bat->psy))
return PTR_ERR(bat->psy);
return ssam_device_notifier_register(bat->sdev, &bat->notif);
}
/* -- Driver setup. --------------------------------------------------------- */
static int __maybe_unused surface_battery_resume(struct device *dev)
{
return spwr_battery_recheck_full(dev_get_drvdata(dev));
}
static SIMPLE_DEV_PM_OPS(surface_battery_pm_ops, NULL, surface_battery_resume);
static int surface_battery_probe(struct ssam_device *sdev)
{
const struct spwr_psy_properties *p;
struct spwr_battery_device *bat;
p = ssam_device_get_match_data(sdev);
if (!p)
return -ENODEV;
bat = devm_kzalloc(&sdev->dev, sizeof(*bat), GFP_KERNEL);
if (!bat)
return -ENOMEM;
spwr_battery_init(bat, sdev, p->registry, p->name);
ssam_device_set_drvdata(sdev, bat);
return spwr_battery_register(bat);
}
static void surface_battery_remove(struct ssam_device *sdev)
{
struct spwr_battery_device *bat = ssam_device_get_drvdata(sdev);
ssam_device_notifier_unregister(sdev, &bat->notif);
cancel_delayed_work_sync(&bat->update_work);
}
static const struct spwr_psy_properties spwr_psy_props_bat1 = {
.name = "BAT1",
.registry = SSAM_EVENT_REGISTRY_SAM,
};
static const struct spwr_psy_properties spwr_psy_props_bat2_sb3 = {
.name = "BAT2",
.registry = SSAM_EVENT_REGISTRY_KIP,
};
static const struct ssam_device_id surface_battery_match[] = {
{ SSAM_SDEV(BAT, SAM, 0x01, 0x00), (unsigned long)&spwr_psy_props_bat1 },
{ SSAM_SDEV(BAT, KIP, 0x01, 0x00), (unsigned long)&spwr_psy_props_bat2_sb3 },
{ },
};
MODULE_DEVICE_TABLE(ssam, surface_battery_match);
static struct ssam_device_driver surface_battery_driver = {
.probe = surface_battery_probe,
.remove = surface_battery_remove,
.match_table = surface_battery_match,
.driver = {
.name = "surface_battery",
.pm = &surface_battery_pm_ops,
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
};
module_ssam_device_driver(surface_battery_driver);
MODULE_AUTHOR("Maximilian Luz <[email protected]>");
MODULE_DESCRIPTION("Battery driver for Surface System Aggregator Module");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/surface_battery.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Universal power supply monitor class
*
* Copyright © 2007 Anton Vorontsov <[email protected]>
* Copyright © 2004 Szabolcs Gyurko
* Copyright © 2003 Ian Molton <[email protected]>
*
* Modified: 2004, Oct Szabolcs Gyurko
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/notifier.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/power_supply.h>
#include <linux/property.h>
#include <linux/thermal.h>
#include <linux/fixp-arith.h>
#include "power_supply.h"
#include "samsung-sdi-battery.h"
/* exported for the APM Power driver, APM emulation */
struct class *power_supply_class;
EXPORT_SYMBOL_GPL(power_supply_class);
ATOMIC_NOTIFIER_HEAD(power_supply_notifier);
EXPORT_SYMBOL_GPL(power_supply_notifier);
static struct device_type power_supply_dev_type;
#define POWER_SUPPLY_DEFERRED_REGISTER_TIME msecs_to_jiffies(10)
static bool __power_supply_is_supplied_by(struct power_supply *supplier,
struct power_supply *supply)
{
int i;
if (!supply->supplied_from && !supplier->supplied_to)
return false;
/* Support both supplied_to and supplied_from modes */
if (supply->supplied_from) {
if (!supplier->desc->name)
return false;
for (i = 0; i < supply->num_supplies; i++)
if (!strcmp(supplier->desc->name, supply->supplied_from[i]))
return true;
} else {
if (!supply->desc->name)
return false;
for (i = 0; i < supplier->num_supplicants; i++)
if (!strcmp(supplier->supplied_to[i], supply->desc->name))
return true;
}
return false;
}
static int __power_supply_changed_work(struct device *dev, void *data)
{
struct power_supply *psy = data;
struct power_supply *pst = dev_get_drvdata(dev);
if (__power_supply_is_supplied_by(psy, pst)) {
if (pst->desc->external_power_changed)
pst->desc->external_power_changed(pst);
}
return 0;
}
static void power_supply_changed_work(struct work_struct *work)
{
unsigned long flags;
struct power_supply *psy = container_of(work, struct power_supply,
changed_work);
dev_dbg(&psy->dev, "%s\n", __func__);
spin_lock_irqsave(&psy->changed_lock, flags);
/*
* Check 'changed' here to avoid issues due to race between
* power_supply_changed() and this routine. In worst case
* power_supply_changed() can be called again just before we take above
* lock. During the first call of this routine we will mark 'changed' as
* false and it will stay false for the next call as well.
*/
if (likely(psy->changed)) {
psy->changed = false;
spin_unlock_irqrestore(&psy->changed_lock, flags);
class_for_each_device(power_supply_class, NULL, psy,
__power_supply_changed_work);
power_supply_update_leds(psy);
atomic_notifier_call_chain(&power_supply_notifier,
PSY_EVENT_PROP_CHANGED, psy);
kobject_uevent(&psy->dev.kobj, KOBJ_CHANGE);
spin_lock_irqsave(&psy->changed_lock, flags);
}
/*
* Hold the wakeup_source until all events are processed.
* power_supply_changed() might have called again and have set 'changed'
* to true.
*/
if (likely(!psy->changed))
pm_relax(&psy->dev);
spin_unlock_irqrestore(&psy->changed_lock, flags);
}
void power_supply_changed(struct power_supply *psy)
{
unsigned long flags;
dev_dbg(&psy->dev, "%s\n", __func__);
spin_lock_irqsave(&psy->changed_lock, flags);
psy->changed = true;
pm_stay_awake(&psy->dev);
spin_unlock_irqrestore(&psy->changed_lock, flags);
schedule_work(&psy->changed_work);
}
EXPORT_SYMBOL_GPL(power_supply_changed);
/*
* Notify that power supply was registered after parent finished the probing.
*
* Often power supply is registered from driver's probe function. However
* calling power_supply_changed() directly from power_supply_register()
* would lead to execution of get_property() function provided by the driver
* too early - before the probe ends.
*
* Avoid that by waiting on parent's mutex.
*/
static void power_supply_deferred_register_work(struct work_struct *work)
{
struct power_supply *psy = container_of(work, struct power_supply,
deferred_register_work.work);
if (psy->dev.parent) {
while (!mutex_trylock(&psy->dev.parent->mutex)) {
if (psy->removing)
return;
msleep(10);
}
}
power_supply_changed(psy);
if (psy->dev.parent)
mutex_unlock(&psy->dev.parent->mutex);
}
#ifdef CONFIG_OF
static int __power_supply_populate_supplied_from(struct device *dev,
void *data)
{
struct power_supply *psy = data;
struct power_supply *epsy = dev_get_drvdata(dev);
struct device_node *np;
int i = 0;
do {
np = of_parse_phandle(psy->of_node, "power-supplies", i++);
if (!np)
break;
if (np == epsy->of_node) {
dev_dbg(&psy->dev, "%s: Found supply : %s\n",
psy->desc->name, epsy->desc->name);
psy->supplied_from[i-1] = (char *)epsy->desc->name;
psy->num_supplies++;
of_node_put(np);
break;
}
of_node_put(np);
} while (np);
return 0;
}
static int power_supply_populate_supplied_from(struct power_supply *psy)
{
int error;
error = class_for_each_device(power_supply_class, NULL, psy,
__power_supply_populate_supplied_from);
dev_dbg(&psy->dev, "%s %d\n", __func__, error);
return error;
}
static int __power_supply_find_supply_from_node(struct device *dev,
void *data)
{
struct device_node *np = data;
struct power_supply *epsy = dev_get_drvdata(dev);
/* returning non-zero breaks out of class_for_each_device loop */
if (epsy->of_node == np)
return 1;
return 0;
}
static int power_supply_find_supply_from_node(struct device_node *supply_node)
{
int error;
/*
* class_for_each_device() either returns its own errors or values
* returned by __power_supply_find_supply_from_node().
*
* __power_supply_find_supply_from_node() will return 0 (no match)
* or 1 (match).
*
* We return 0 if class_for_each_device() returned 1, -EPROBE_DEFER if
* it returned 0, or error as returned by it.
*/
error = class_for_each_device(power_supply_class, NULL, supply_node,
__power_supply_find_supply_from_node);
return error ? (error == 1 ? 0 : error) : -EPROBE_DEFER;
}
static int power_supply_check_supplies(struct power_supply *psy)
{
struct device_node *np;
int cnt = 0;
/* If there is already a list honor it */
if (psy->supplied_from && psy->num_supplies > 0)
return 0;
/* No device node found, nothing to do */
if (!psy->of_node)
return 0;
do {
int ret;
np = of_parse_phandle(psy->of_node, "power-supplies", cnt++);
if (!np)
break;
ret = power_supply_find_supply_from_node(np);
of_node_put(np);
if (ret) {
dev_dbg(&psy->dev, "Failed to find supply!\n");
return ret;
}
} while (np);
/* Missing valid "power-supplies" entries */
if (cnt == 1)
return 0;
/* All supplies found, allocate char ** array for filling */
psy->supplied_from = devm_kzalloc(&psy->dev, sizeof(*psy->supplied_from),
GFP_KERNEL);
if (!psy->supplied_from)
return -ENOMEM;
*psy->supplied_from = devm_kcalloc(&psy->dev,
cnt - 1, sizeof(**psy->supplied_from),
GFP_KERNEL);
if (!*psy->supplied_from)
return -ENOMEM;
return power_supply_populate_supplied_from(psy);
}
#else
static int power_supply_check_supplies(struct power_supply *psy)
{
int nval, ret;
if (!psy->dev.parent)
return 0;
nval = device_property_string_array_count(psy->dev.parent, "supplied-from");
if (nval <= 0)
return 0;
psy->supplied_from = devm_kmalloc_array(&psy->dev, nval,
sizeof(char *), GFP_KERNEL);
if (!psy->supplied_from)
return -ENOMEM;
ret = device_property_read_string_array(psy->dev.parent,
"supplied-from", (const char **)psy->supplied_from, nval);
if (ret < 0)
return ret;
psy->num_supplies = nval;
return 0;
}
#endif
struct psy_am_i_supplied_data {
struct power_supply *psy;
unsigned int count;
};
static int __power_supply_am_i_supplied(struct device *dev, void *_data)
{
union power_supply_propval ret = {0,};
struct power_supply *epsy = dev_get_drvdata(dev);
struct psy_am_i_supplied_data *data = _data;
if (__power_supply_is_supplied_by(epsy, data->psy)) {
data->count++;
if (!epsy->desc->get_property(epsy, POWER_SUPPLY_PROP_ONLINE,
&ret))
return ret.intval;
}
return 0;
}
int power_supply_am_i_supplied(struct power_supply *psy)
{
struct psy_am_i_supplied_data data = { psy, 0 };
int error;
error = class_for_each_device(power_supply_class, NULL, &data,
__power_supply_am_i_supplied);
dev_dbg(&psy->dev, "%s count %u err %d\n", __func__, data.count, error);
if (data.count == 0)
return -ENODEV;
return error;
}
EXPORT_SYMBOL_GPL(power_supply_am_i_supplied);
static int __power_supply_is_system_supplied(struct device *dev, void *data)
{
union power_supply_propval ret = {0,};
struct power_supply *psy = dev_get_drvdata(dev);
unsigned int *count = data;
if (!psy->desc->get_property(psy, POWER_SUPPLY_PROP_SCOPE, &ret))
if (ret.intval == POWER_SUPPLY_SCOPE_DEVICE)
return 0;
(*count)++;
if (psy->desc->type != POWER_SUPPLY_TYPE_BATTERY)
if (!psy->desc->get_property(psy, POWER_SUPPLY_PROP_ONLINE,
&ret))
return ret.intval;
return 0;
}
int power_supply_is_system_supplied(void)
{
int error;
unsigned int count = 0;
error = class_for_each_device(power_supply_class, NULL, &count,
__power_supply_is_system_supplied);
/*
* If no system scope power class device was found at all, most probably we
* are running on a desktop system, so assume we are on mains power.
*/
if (count == 0)
return 1;
return error;
}
EXPORT_SYMBOL_GPL(power_supply_is_system_supplied);
struct psy_get_supplier_prop_data {
struct power_supply *psy;
enum power_supply_property psp;
union power_supply_propval *val;
};
static int __power_supply_get_supplier_property(struct device *dev, void *_data)
{
struct power_supply *epsy = dev_get_drvdata(dev);
struct psy_get_supplier_prop_data *data = _data;
if (__power_supply_is_supplied_by(epsy, data->psy))
if (!power_supply_get_property(epsy, data->psp, data->val))
return 1; /* Success */
return 0; /* Continue iterating */
}
int power_supply_get_property_from_supplier(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct psy_get_supplier_prop_data data = {
.psy = psy,
.psp = psp,
.val = val,
};
int ret;
/*
* This function is not intended for use with a supply with multiple
* suppliers, we simply pick the first supply to report the psp.
*/
ret = class_for_each_device(power_supply_class, NULL, &data,
__power_supply_get_supplier_property);
if (ret < 0)
return ret;
if (ret == 0)
return -ENODEV;
return 0;
}
EXPORT_SYMBOL_GPL(power_supply_get_property_from_supplier);
int power_supply_set_battery_charged(struct power_supply *psy)
{
if (atomic_read(&psy->use_cnt) >= 0 &&
psy->desc->type == POWER_SUPPLY_TYPE_BATTERY &&
psy->desc->set_charged) {
psy->desc->set_charged(psy);
return 0;
}
return -EINVAL;
}
EXPORT_SYMBOL_GPL(power_supply_set_battery_charged);
static int power_supply_match_device_by_name(struct device *dev, const void *data)
{
const char *name = data;
struct power_supply *psy = dev_get_drvdata(dev);
return strcmp(psy->desc->name, name) == 0;
}
/**
* power_supply_get_by_name() - Search for a power supply and returns its ref
* @name: Power supply name to fetch
*
* If power supply was found, it increases reference count for the
* internal power supply's device. The user should power_supply_put()
* after usage.
*
* Return: On success returns a reference to a power supply with
* matching name equals to @name, a NULL otherwise.
*/
struct power_supply *power_supply_get_by_name(const char *name)
{
struct power_supply *psy = NULL;
struct device *dev = class_find_device(power_supply_class, NULL, name,
power_supply_match_device_by_name);
if (dev) {
psy = dev_get_drvdata(dev);
atomic_inc(&psy->use_cnt);
}
return psy;
}
EXPORT_SYMBOL_GPL(power_supply_get_by_name);
/**
* power_supply_put() - Drop reference obtained with power_supply_get_by_name
* @psy: Reference to put
*
* The reference to power supply should be put before unregistering
* the power supply.
*/
void power_supply_put(struct power_supply *psy)
{
might_sleep();
atomic_dec(&psy->use_cnt);
put_device(&psy->dev);
}
EXPORT_SYMBOL_GPL(power_supply_put);
#ifdef CONFIG_OF
static int power_supply_match_device_node(struct device *dev, const void *data)
{
return dev->parent && dev->parent->of_node == data;
}
/**
* power_supply_get_by_phandle() - Search for a power supply and returns its ref
* @np: Pointer to device node holding phandle property
* @property: Name of property holding a power supply name
*
* If power supply was found, it increases reference count for the
* internal power supply's device. The user should power_supply_put()
* after usage.
*
* Return: On success returns a reference to a power supply with
* matching name equals to value under @property, NULL or ERR_PTR otherwise.
*/
struct power_supply *power_supply_get_by_phandle(struct device_node *np,
const char *property)
{
struct device_node *power_supply_np;
struct power_supply *psy = NULL;
struct device *dev;
power_supply_np = of_parse_phandle(np, property, 0);
if (!power_supply_np)
return ERR_PTR(-ENODEV);
dev = class_find_device(power_supply_class, NULL, power_supply_np,
power_supply_match_device_node);
of_node_put(power_supply_np);
if (dev) {
psy = dev_get_drvdata(dev);
atomic_inc(&psy->use_cnt);
}
return psy;
}
EXPORT_SYMBOL_GPL(power_supply_get_by_phandle);
static void devm_power_supply_put(struct device *dev, void *res)
{
struct power_supply **psy = res;
power_supply_put(*psy);
}
/**
* devm_power_supply_get_by_phandle() - Resource managed version of
* power_supply_get_by_phandle()
* @dev: Pointer to device holding phandle property
* @property: Name of property holding a power supply phandle
*
* Return: On success returns a reference to a power supply with
* matching name equals to value under @property, NULL or ERR_PTR otherwise.
*/
struct power_supply *devm_power_supply_get_by_phandle(struct device *dev,
const char *property)
{
struct power_supply **ptr, *psy;
if (!dev->of_node)
return ERR_PTR(-ENODEV);
ptr = devres_alloc(devm_power_supply_put, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return ERR_PTR(-ENOMEM);
psy = power_supply_get_by_phandle(dev->of_node, property);
if (IS_ERR_OR_NULL(psy)) {
devres_free(ptr);
} else {
*ptr = psy;
devres_add(dev, ptr);
}
return psy;
}
EXPORT_SYMBOL_GPL(devm_power_supply_get_by_phandle);
#endif /* CONFIG_OF */
int power_supply_get_battery_info(struct power_supply *psy,
struct power_supply_battery_info **info_out)
{
struct power_supply_resistance_temp_table *resist_table;
struct power_supply_battery_info *info;
struct device_node *battery_np = NULL;
struct fwnode_reference_args args;
struct fwnode_handle *fwnode = NULL;
const char *value;
int err, len, index;
const __be32 *list;
u32 min_max[2];
if (psy->of_node) {
battery_np = of_parse_phandle(psy->of_node, "monitored-battery", 0);
if (!battery_np)
return -ENODEV;
fwnode = fwnode_handle_get(of_fwnode_handle(battery_np));
} else if (psy->dev.parent) {
err = fwnode_property_get_reference_args(
dev_fwnode(psy->dev.parent),
"monitored-battery", NULL, 0, 0, &args);
if (err)
return err;
fwnode = args.fwnode;
}
if (!fwnode)
return -ENOENT;
err = fwnode_property_read_string(fwnode, "compatible", &value);
if (err)
goto out_put_node;
/* Try static batteries first */
err = samsung_sdi_battery_get_info(&psy->dev, value, &info);
if (!err)
goto out_ret_pointer;
else if (err == -ENODEV)
/*
* Device does not have a static battery.
* Proceed to look for a simple battery.
*/
err = 0;
if (strcmp("simple-battery", value)) {
err = -ENODEV;
goto out_put_node;
}
info = devm_kzalloc(&psy->dev, sizeof(*info), GFP_KERNEL);
if (!info) {
err = -ENOMEM;
goto out_put_node;
}
info->technology = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
info->energy_full_design_uwh = -EINVAL;
info->charge_full_design_uah = -EINVAL;
info->voltage_min_design_uv = -EINVAL;
info->voltage_max_design_uv = -EINVAL;
info->precharge_current_ua = -EINVAL;
info->charge_term_current_ua = -EINVAL;
info->constant_charge_current_max_ua = -EINVAL;
info->constant_charge_voltage_max_uv = -EINVAL;
info->tricklecharge_current_ua = -EINVAL;
info->precharge_voltage_max_uv = -EINVAL;
info->charge_restart_voltage_uv = -EINVAL;
info->overvoltage_limit_uv = -EINVAL;
info->maintenance_charge = NULL;
info->alert_low_temp_charge_current_ua = -EINVAL;
info->alert_low_temp_charge_voltage_uv = -EINVAL;
info->alert_high_temp_charge_current_ua = -EINVAL;
info->alert_high_temp_charge_voltage_uv = -EINVAL;
info->temp_ambient_alert_min = INT_MIN;
info->temp_ambient_alert_max = INT_MAX;
info->temp_alert_min = INT_MIN;
info->temp_alert_max = INT_MAX;
info->temp_min = INT_MIN;
info->temp_max = INT_MAX;
info->factory_internal_resistance_uohm = -EINVAL;
info->resist_table = NULL;
info->bti_resistance_ohm = -EINVAL;
info->bti_resistance_tolerance = -EINVAL;
for (index = 0; index < POWER_SUPPLY_OCV_TEMP_MAX; index++) {
info->ocv_table[index] = NULL;
info->ocv_temp[index] = -EINVAL;
info->ocv_table_size[index] = -EINVAL;
}
/* The property and field names below must correspond to elements
* in enum power_supply_property. For reasoning, see
* Documentation/power/power_supply_class.rst.
*/
if (!fwnode_property_read_string(fwnode, "device-chemistry", &value)) {
if (!strcmp("nickel-cadmium", value))
info->technology = POWER_SUPPLY_TECHNOLOGY_NiCd;
else if (!strcmp("nickel-metal-hydride", value))
info->technology = POWER_SUPPLY_TECHNOLOGY_NiMH;
else if (!strcmp("lithium-ion", value))
/* Imprecise lithium-ion type */
info->technology = POWER_SUPPLY_TECHNOLOGY_LION;
else if (!strcmp("lithium-ion-polymer", value))
info->technology = POWER_SUPPLY_TECHNOLOGY_LIPO;
else if (!strcmp("lithium-ion-iron-phosphate", value))
info->technology = POWER_SUPPLY_TECHNOLOGY_LiFe;
else if (!strcmp("lithium-ion-manganese-oxide", value))
info->technology = POWER_SUPPLY_TECHNOLOGY_LiMn;
else
dev_warn(&psy->dev, "%s unknown battery type\n", value);
}
fwnode_property_read_u32(fwnode, "energy-full-design-microwatt-hours",
&info->energy_full_design_uwh);
fwnode_property_read_u32(fwnode, "charge-full-design-microamp-hours",
&info->charge_full_design_uah);
fwnode_property_read_u32(fwnode, "voltage-min-design-microvolt",
&info->voltage_min_design_uv);
fwnode_property_read_u32(fwnode, "voltage-max-design-microvolt",
&info->voltage_max_design_uv);
fwnode_property_read_u32(fwnode, "trickle-charge-current-microamp",
&info->tricklecharge_current_ua);
fwnode_property_read_u32(fwnode, "precharge-current-microamp",
&info->precharge_current_ua);
fwnode_property_read_u32(fwnode, "precharge-upper-limit-microvolt",
&info->precharge_voltage_max_uv);
fwnode_property_read_u32(fwnode, "charge-term-current-microamp",
&info->charge_term_current_ua);
fwnode_property_read_u32(fwnode, "re-charge-voltage-microvolt",
&info->charge_restart_voltage_uv);
fwnode_property_read_u32(fwnode, "over-voltage-threshold-microvolt",
&info->overvoltage_limit_uv);
fwnode_property_read_u32(fwnode, "constant-charge-current-max-microamp",
&info->constant_charge_current_max_ua);
fwnode_property_read_u32(fwnode, "constant-charge-voltage-max-microvolt",
&info->constant_charge_voltage_max_uv);
fwnode_property_read_u32(fwnode, "factory-internal-resistance-micro-ohms",
&info->factory_internal_resistance_uohm);
if (!fwnode_property_read_u32_array(fwnode, "ambient-celsius",
min_max, ARRAY_SIZE(min_max))) {
info->temp_ambient_alert_min = min_max[0];
info->temp_ambient_alert_max = min_max[1];
}
if (!fwnode_property_read_u32_array(fwnode, "alert-celsius",
min_max, ARRAY_SIZE(min_max))) {
info->temp_alert_min = min_max[0];
info->temp_alert_max = min_max[1];
}
if (!fwnode_property_read_u32_array(fwnode, "operating-range-celsius",
min_max, ARRAY_SIZE(min_max))) {
info->temp_min = min_max[0];
info->temp_max = min_max[1];
}
/*
* The below code uses raw of-data parsing to parse
* /schemas/types.yaml#/definitions/uint32-matrix
* data, so for now this is only support with of.
*/
if (!battery_np)
goto out_ret_pointer;
len = of_property_count_u32_elems(battery_np, "ocv-capacity-celsius");
if (len < 0 && len != -EINVAL) {
err = len;
goto out_put_node;
} else if (len > POWER_SUPPLY_OCV_TEMP_MAX) {
dev_err(&psy->dev, "Too many temperature values\n");
err = -EINVAL;
goto out_put_node;
} else if (len > 0) {
of_property_read_u32_array(battery_np, "ocv-capacity-celsius",
info->ocv_temp, len);
}
for (index = 0; index < len; index++) {
struct power_supply_battery_ocv_table *table;
char *propname;
int i, tab_len, size;
propname = kasprintf(GFP_KERNEL, "ocv-capacity-table-%d", index);
if (!propname) {
power_supply_put_battery_info(psy, info);
err = -ENOMEM;
goto out_put_node;
}
list = of_get_property(battery_np, propname, &size);
if (!list || !size) {
dev_err(&psy->dev, "failed to get %s\n", propname);
kfree(propname);
power_supply_put_battery_info(psy, info);
err = -EINVAL;
goto out_put_node;
}
kfree(propname);
tab_len = size / (2 * sizeof(__be32));
info->ocv_table_size[index] = tab_len;
table = info->ocv_table[index] =
devm_kcalloc(&psy->dev, tab_len, sizeof(*table), GFP_KERNEL);
if (!info->ocv_table[index]) {
power_supply_put_battery_info(psy, info);
err = -ENOMEM;
goto out_put_node;
}
for (i = 0; i < tab_len; i++) {
table[i].ocv = be32_to_cpu(*list);
list++;
table[i].capacity = be32_to_cpu(*list);
list++;
}
}
list = of_get_property(battery_np, "resistance-temp-table", &len);
if (!list || !len)
goto out_ret_pointer;
info->resist_table_size = len / (2 * sizeof(__be32));
resist_table = info->resist_table = devm_kcalloc(&psy->dev,
info->resist_table_size,
sizeof(*resist_table),
GFP_KERNEL);
if (!info->resist_table) {
power_supply_put_battery_info(psy, info);
err = -ENOMEM;
goto out_put_node;
}
for (index = 0; index < info->resist_table_size; index++) {
resist_table[index].temp = be32_to_cpu(*list++);
resist_table[index].resistance = be32_to_cpu(*list++);
}
out_ret_pointer:
/* Finally return the whole thing */
*info_out = info;
out_put_node:
fwnode_handle_put(fwnode);
of_node_put(battery_np);
return err;
}
EXPORT_SYMBOL_GPL(power_supply_get_battery_info);
void power_supply_put_battery_info(struct power_supply *psy,
struct power_supply_battery_info *info)
{
int i;
for (i = 0; i < POWER_SUPPLY_OCV_TEMP_MAX; i++) {
if (info->ocv_table[i])
devm_kfree(&psy->dev, info->ocv_table[i]);
}
if (info->resist_table)
devm_kfree(&psy->dev, info->resist_table);
devm_kfree(&psy->dev, info);
}
EXPORT_SYMBOL_GPL(power_supply_put_battery_info);
const enum power_supply_property power_supply_battery_info_properties[] = {
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MIN,
POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MAX,
POWER_SUPPLY_PROP_TEMP_ALERT_MIN,
POWER_SUPPLY_PROP_TEMP_ALERT_MAX,
POWER_SUPPLY_PROP_TEMP_MIN,
POWER_SUPPLY_PROP_TEMP_MAX,
};
EXPORT_SYMBOL_GPL(power_supply_battery_info_properties);
const size_t power_supply_battery_info_properties_size = ARRAY_SIZE(power_supply_battery_info_properties);
EXPORT_SYMBOL_GPL(power_supply_battery_info_properties_size);
bool power_supply_battery_info_has_prop(struct power_supply_battery_info *info,
enum power_supply_property psp)
{
if (!info)
return false;
switch (psp) {
case POWER_SUPPLY_PROP_TECHNOLOGY:
return info->technology != POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
return info->energy_full_design_uwh >= 0;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
return info->charge_full_design_uah >= 0;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
return info->voltage_min_design_uv >= 0;
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
return info->voltage_max_design_uv >= 0;
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
return info->precharge_current_ua >= 0;
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return info->charge_term_current_ua >= 0;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
return info->constant_charge_current_max_ua >= 0;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
return info->constant_charge_voltage_max_uv >= 0;
case POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MIN:
return info->temp_ambient_alert_min > INT_MIN;
case POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MAX:
return info->temp_ambient_alert_max < INT_MAX;
case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
return info->temp_alert_min > INT_MIN;
case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
return info->temp_alert_max < INT_MAX;
case POWER_SUPPLY_PROP_TEMP_MIN:
return info->temp_min > INT_MIN;
case POWER_SUPPLY_PROP_TEMP_MAX:
return info->temp_max < INT_MAX;
default:
return false;
}
}
EXPORT_SYMBOL_GPL(power_supply_battery_info_has_prop);
int power_supply_battery_info_get_prop(struct power_supply_battery_info *info,
enum power_supply_property psp,
union power_supply_propval *val)
{
if (!info)
return -EINVAL;
if (!power_supply_battery_info_has_prop(info, psp))
return -EINVAL;
switch (psp) {
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = info->technology;
return 0;
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
val->intval = info->energy_full_design_uwh;
return 0;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
val->intval = info->charge_full_design_uah;
return 0;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
val->intval = info->voltage_min_design_uv;
return 0;
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
val->intval = info->voltage_max_design_uv;
return 0;
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
val->intval = info->precharge_current_ua;
return 0;
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
val->intval = info->charge_term_current_ua;
return 0;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
val->intval = info->constant_charge_current_max_ua;
return 0;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
val->intval = info->constant_charge_voltage_max_uv;
return 0;
case POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MIN:
val->intval = info->temp_ambient_alert_min;
return 0;
case POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MAX:
val->intval = info->temp_ambient_alert_max;
return 0;
case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
val->intval = info->temp_alert_min;
return 0;
case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
val->intval = info->temp_alert_max;
return 0;
case POWER_SUPPLY_PROP_TEMP_MIN:
val->intval = info->temp_min;
return 0;
case POWER_SUPPLY_PROP_TEMP_MAX:
val->intval = info->temp_max;
return 0;
default:
return -EINVAL;
}
}
EXPORT_SYMBOL_GPL(power_supply_battery_info_get_prop);
/**
* power_supply_temp2resist_simple() - find the battery internal resistance
* percent from temperature
* @table: Pointer to battery resistance temperature table
* @table_len: The table length
* @temp: Current temperature
*
* This helper function is used to look up battery internal resistance percent
* according to current temperature value from the resistance temperature table,
* and the table must be ordered descending. Then the actual battery internal
* resistance = the ideal battery internal resistance * percent / 100.
*
* Return: the battery internal resistance percent
*/
int power_supply_temp2resist_simple(struct power_supply_resistance_temp_table *table,
int table_len, int temp)
{
int i, high, low;
for (i = 0; i < table_len; i++)
if (temp > table[i].temp)
break;
/* The library function will deal with high == low */
if (i == 0)
high = low = i;
else if (i == table_len)
high = low = i - 1;
else
high = (low = i) - 1;
return fixp_linear_interpolate(table[low].temp,
table[low].resistance,
table[high].temp,
table[high].resistance,
temp);
}
EXPORT_SYMBOL_GPL(power_supply_temp2resist_simple);
/**
* power_supply_vbat2ri() - find the battery internal resistance
* from the battery voltage
* @info: The battery information container
* @vbat_uv: The battery voltage in microvolt
* @charging: If we are charging (true) or not (false)
*
* This helper function is used to look up battery internal resistance
* according to current battery voltage. Depending on whether the battery
* is currently charging or not, different resistance will be returned.
*
* Returns the internal resistance in microohm or negative error code.
*/
int power_supply_vbat2ri(struct power_supply_battery_info *info,
int vbat_uv, bool charging)
{
struct power_supply_vbat_ri_table *vbat2ri;
int table_len;
int i, high, low;
/*
* If we are charging, and the battery supplies a separate table
* for this state, we use that in order to compensate for the
* charging voltage. Otherwise we use the main table.
*/
if (charging && info->vbat2ri_charging) {
vbat2ri = info->vbat2ri_charging;
table_len = info->vbat2ri_charging_size;
} else {
vbat2ri = info->vbat2ri_discharging;
table_len = info->vbat2ri_discharging_size;
}
/*
* If no tables are specified, or if we are above the highest voltage in
* the voltage table, just return the factory specified internal resistance.
*/
if (!vbat2ri || (table_len <= 0) || (vbat_uv > vbat2ri[0].vbat_uv)) {
if (charging && (info->factory_internal_resistance_charging_uohm > 0))
return info->factory_internal_resistance_charging_uohm;
else
return info->factory_internal_resistance_uohm;
}
/* Break loop at table_len - 1 because that is the highest index */
for (i = 0; i < table_len - 1; i++)
if (vbat_uv > vbat2ri[i].vbat_uv)
break;
/* The library function will deal with high == low */
if ((i == 0) || (i == (table_len - 1)))
high = i;
else
high = i - 1;
low = i;
return fixp_linear_interpolate(vbat2ri[low].vbat_uv,
vbat2ri[low].ri_uohm,
vbat2ri[high].vbat_uv,
vbat2ri[high].ri_uohm,
vbat_uv);
}
EXPORT_SYMBOL_GPL(power_supply_vbat2ri);
struct power_supply_maintenance_charge_table *
power_supply_get_maintenance_charging_setting(struct power_supply_battery_info *info,
int index)
{
if (index >= info->maintenance_charge_size)
return NULL;
return &info->maintenance_charge[index];
}
EXPORT_SYMBOL_GPL(power_supply_get_maintenance_charging_setting);
/**
* power_supply_ocv2cap_simple() - find the battery capacity
* @table: Pointer to battery OCV lookup table
* @table_len: OCV table length
* @ocv: Current OCV value
*
* This helper function is used to look up battery capacity according to
* current OCV value from one OCV table, and the OCV table must be ordered
* descending.
*
* Return: the battery capacity.
*/
int power_supply_ocv2cap_simple(struct power_supply_battery_ocv_table *table,
int table_len, int ocv)
{
int i, high, low;
for (i = 0; i < table_len; i++)
if (ocv > table[i].ocv)
break;
/* The library function will deal with high == low */
if (i == 0)
high = low = i;
else if (i == table_len)
high = low = i - 1;
else
high = (low = i) - 1;
return fixp_linear_interpolate(table[low].ocv,
table[low].capacity,
table[high].ocv,
table[high].capacity,
ocv);
}
EXPORT_SYMBOL_GPL(power_supply_ocv2cap_simple);
struct power_supply_battery_ocv_table *
power_supply_find_ocv2cap_table(struct power_supply_battery_info *info,
int temp, int *table_len)
{
int best_temp_diff = INT_MAX, temp_diff;
u8 i, best_index = 0;
if (!info->ocv_table[0])
return NULL;
for (i = 0; i < POWER_SUPPLY_OCV_TEMP_MAX; i++) {
/* Out of capacity tables */
if (!info->ocv_table[i])
break;
temp_diff = abs(info->ocv_temp[i] - temp);
if (temp_diff < best_temp_diff) {
best_temp_diff = temp_diff;
best_index = i;
}
}
*table_len = info->ocv_table_size[best_index];
return info->ocv_table[best_index];
}
EXPORT_SYMBOL_GPL(power_supply_find_ocv2cap_table);
int power_supply_batinfo_ocv2cap(struct power_supply_battery_info *info,
int ocv, int temp)
{
struct power_supply_battery_ocv_table *table;
int table_len;
table = power_supply_find_ocv2cap_table(info, temp, &table_len);
if (!table)
return -EINVAL;
return power_supply_ocv2cap_simple(table, table_len, ocv);
}
EXPORT_SYMBOL_GPL(power_supply_batinfo_ocv2cap);
bool power_supply_battery_bti_in_range(struct power_supply_battery_info *info,
int resistance)
{
int low, high;
/* Nothing like this can be checked */
if (info->bti_resistance_ohm <= 0)
return false;
/* This will be extremely strict and unlikely to work */
if (info->bti_resistance_tolerance <= 0)
return (info->bti_resistance_ohm == resistance);
low = info->bti_resistance_ohm -
(info->bti_resistance_ohm * info->bti_resistance_tolerance) / 100;
high = info->bti_resistance_ohm +
(info->bti_resistance_ohm * info->bti_resistance_tolerance) / 100;
return ((resistance >= low) && (resistance <= high));
}
EXPORT_SYMBOL_GPL(power_supply_battery_bti_in_range);
static bool psy_has_property(const struct power_supply_desc *psy_desc,
enum power_supply_property psp)
{
bool found = false;
int i;
for (i = 0; i < psy_desc->num_properties; i++) {
if (psy_desc->properties[i] == psp) {
found = true;
break;
}
}
return found;
}
int power_supply_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
if (atomic_read(&psy->use_cnt) <= 0) {
if (!psy->initialized)
return -EAGAIN;
return -ENODEV;
}
if (psy_has_property(psy->desc, psp))
return psy->desc->get_property(psy, psp, val);
else if (power_supply_battery_info_has_prop(psy->battery_info, psp))
return power_supply_battery_info_get_prop(psy->battery_info, psp, val);
else
return -EINVAL;
}
EXPORT_SYMBOL_GPL(power_supply_get_property);
int power_supply_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
if (atomic_read(&psy->use_cnt) <= 0 || !psy->desc->set_property)
return -ENODEV;
return psy->desc->set_property(psy, psp, val);
}
EXPORT_SYMBOL_GPL(power_supply_set_property);
int power_supply_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
if (atomic_read(&psy->use_cnt) <= 0 ||
!psy->desc->property_is_writeable)
return -ENODEV;
return psy->desc->property_is_writeable(psy, psp);
}
EXPORT_SYMBOL_GPL(power_supply_property_is_writeable);
void power_supply_external_power_changed(struct power_supply *psy)
{
if (atomic_read(&psy->use_cnt) <= 0 ||
!psy->desc->external_power_changed)
return;
psy->desc->external_power_changed(psy);
}
EXPORT_SYMBOL_GPL(power_supply_external_power_changed);
int power_supply_powers(struct power_supply *psy, struct device *dev)
{
return sysfs_create_link(&psy->dev.kobj, &dev->kobj, "powers");
}
EXPORT_SYMBOL_GPL(power_supply_powers);
static void power_supply_dev_release(struct device *dev)
{
struct power_supply *psy = to_power_supply(dev);
dev_dbg(dev, "%s\n", __func__);
kfree(psy);
}
int power_supply_reg_notifier(struct notifier_block *nb)
{
return atomic_notifier_chain_register(&power_supply_notifier, nb);
}
EXPORT_SYMBOL_GPL(power_supply_reg_notifier);
void power_supply_unreg_notifier(struct notifier_block *nb)
{
atomic_notifier_chain_unregister(&power_supply_notifier, nb);
}
EXPORT_SYMBOL_GPL(power_supply_unreg_notifier);
#ifdef CONFIG_THERMAL
static int power_supply_read_temp(struct thermal_zone_device *tzd,
int *temp)
{
struct power_supply *psy;
union power_supply_propval val;
int ret;
WARN_ON(tzd == NULL);
psy = thermal_zone_device_priv(tzd);
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_TEMP, &val);
if (ret)
return ret;
/* Convert tenths of degree Celsius to milli degree Celsius. */
*temp = val.intval * 100;
return ret;
}
static struct thermal_zone_device_ops psy_tzd_ops = {
.get_temp = power_supply_read_temp,
};
static int psy_register_thermal(struct power_supply *psy)
{
int ret;
if (psy->desc->no_thermal)
return 0;
/* Register battery zone device psy reports temperature */
if (psy_has_property(psy->desc, POWER_SUPPLY_PROP_TEMP)) {
/* Prefer our hwmon device and avoid duplicates */
struct thermal_zone_params tzp = {
.no_hwmon = IS_ENABLED(CONFIG_POWER_SUPPLY_HWMON)
};
psy->tzd = thermal_tripless_zone_device_register(psy->desc->name,
psy, &psy_tzd_ops, &tzp);
if (IS_ERR(psy->tzd))
return PTR_ERR(psy->tzd);
ret = thermal_zone_device_enable(psy->tzd);
if (ret)
thermal_zone_device_unregister(psy->tzd);
return ret;
}
return 0;
}
static void psy_unregister_thermal(struct power_supply *psy)
{
if (IS_ERR_OR_NULL(psy->tzd))
return;
thermal_zone_device_unregister(psy->tzd);
}
#else
static int psy_register_thermal(struct power_supply *psy)
{
return 0;
}
static void psy_unregister_thermal(struct power_supply *psy)
{
}
#endif
static struct power_supply *__must_check
__power_supply_register(struct device *parent,
const struct power_supply_desc *desc,
const struct power_supply_config *cfg,
bool ws)
{
struct device *dev;
struct power_supply *psy;
int rc;
if (!desc || !desc->name || !desc->properties || !desc->num_properties)
return ERR_PTR(-EINVAL);
if (!parent)
pr_warn("%s: Expected proper parent device for '%s'\n",
__func__, desc->name);
if (psy_has_property(desc, POWER_SUPPLY_PROP_USB_TYPE) &&
(!desc->usb_types || !desc->num_usb_types))
return ERR_PTR(-EINVAL);
psy = kzalloc(sizeof(*psy), GFP_KERNEL);
if (!psy)
return ERR_PTR(-ENOMEM);
dev = &psy->dev;
device_initialize(dev);
dev->class = power_supply_class;
dev->type = &power_supply_dev_type;
dev->parent = parent;
dev->release = power_supply_dev_release;
dev_set_drvdata(dev, psy);
psy->desc = desc;
if (cfg) {
dev->groups = cfg->attr_grp;
psy->drv_data = cfg->drv_data;
psy->of_node =
cfg->fwnode ? to_of_node(cfg->fwnode) : cfg->of_node;
psy->supplied_to = cfg->supplied_to;
psy->num_supplicants = cfg->num_supplicants;
}
rc = dev_set_name(dev, "%s", desc->name);
if (rc)
goto dev_set_name_failed;
INIT_WORK(&psy->changed_work, power_supply_changed_work);
INIT_DELAYED_WORK(&psy->deferred_register_work,
power_supply_deferred_register_work);
rc = power_supply_check_supplies(psy);
if (rc) {
dev_dbg(dev, "Not all required supplies found, defer probe\n");
goto check_supplies_failed;
}
/*
* Expose constant battery info, if it is available. While there are
* some chargers accessing constant battery data, we only want to
* expose battery data to userspace for battery devices.
*/
if (desc->type == POWER_SUPPLY_TYPE_BATTERY) {
rc = power_supply_get_battery_info(psy, &psy->battery_info);
if (rc && rc != -ENODEV && rc != -ENOENT)
goto check_supplies_failed;
}
spin_lock_init(&psy->changed_lock);
rc = device_add(dev);
if (rc)
goto device_add_failed;
rc = device_init_wakeup(dev, ws);
if (rc)
goto wakeup_init_failed;
rc = psy_register_thermal(psy);
if (rc)
goto register_thermal_failed;
rc = power_supply_create_triggers(psy);
if (rc)
goto create_triggers_failed;
rc = power_supply_add_hwmon_sysfs(psy);
if (rc)
goto add_hwmon_sysfs_failed;
/*
* Update use_cnt after any uevents (most notably from device_add()).
* We are here still during driver's probe but
* the power_supply_uevent() calls back driver's get_property
* method so:
* 1. Driver did not assigned the returned struct power_supply,
* 2. Driver could not finish initialization (anything in its probe
* after calling power_supply_register()).
*/
atomic_inc(&psy->use_cnt);
psy->initialized = true;
queue_delayed_work(system_power_efficient_wq,
&psy->deferred_register_work,
POWER_SUPPLY_DEFERRED_REGISTER_TIME);
return psy;
add_hwmon_sysfs_failed:
power_supply_remove_triggers(psy);
create_triggers_failed:
psy_unregister_thermal(psy);
register_thermal_failed:
wakeup_init_failed:
device_del(dev);
device_add_failed:
check_supplies_failed:
dev_set_name_failed:
put_device(dev);
return ERR_PTR(rc);
}
/**
* power_supply_register() - Register new power supply
* @parent: Device to be a parent of power supply's device, usually
* the device which probe function calls this
* @desc: Description of power supply, must be valid through whole
* lifetime of this power supply
* @cfg: Run-time specific configuration accessed during registering,
* may be NULL
*
* Return: A pointer to newly allocated power_supply on success
* or ERR_PTR otherwise.
* Use power_supply_unregister() on returned power_supply pointer to release
* resources.
*/
struct power_supply *__must_check power_supply_register(struct device *parent,
const struct power_supply_desc *desc,
const struct power_supply_config *cfg)
{
return __power_supply_register(parent, desc, cfg, true);
}
EXPORT_SYMBOL_GPL(power_supply_register);
/**
* power_supply_register_no_ws() - Register new non-waking-source power supply
* @parent: Device to be a parent of power supply's device, usually
* the device which probe function calls this
* @desc: Description of power supply, must be valid through whole
* lifetime of this power supply
* @cfg: Run-time specific configuration accessed during registering,
* may be NULL
*
* Return: A pointer to newly allocated power_supply on success
* or ERR_PTR otherwise.
* Use power_supply_unregister() on returned power_supply pointer to release
* resources.
*/
struct power_supply *__must_check
power_supply_register_no_ws(struct device *parent,
const struct power_supply_desc *desc,
const struct power_supply_config *cfg)
{
return __power_supply_register(parent, desc, cfg, false);
}
EXPORT_SYMBOL_GPL(power_supply_register_no_ws);
static void devm_power_supply_release(struct device *dev, void *res)
{
struct power_supply **psy = res;
power_supply_unregister(*psy);
}
/**
* devm_power_supply_register() - Register managed power supply
* @parent: Device to be a parent of power supply's device, usually
* the device which probe function calls this
* @desc: Description of power supply, must be valid through whole
* lifetime of this power supply
* @cfg: Run-time specific configuration accessed during registering,
* may be NULL
*
* Return: A pointer to newly allocated power_supply on success
* or ERR_PTR otherwise.
* The returned power_supply pointer will be automatically unregistered
* on driver detach.
*/
struct power_supply *__must_check
devm_power_supply_register(struct device *parent,
const struct power_supply_desc *desc,
const struct power_supply_config *cfg)
{
struct power_supply **ptr, *psy;
ptr = devres_alloc(devm_power_supply_release, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return ERR_PTR(-ENOMEM);
psy = __power_supply_register(parent, desc, cfg, true);
if (IS_ERR(psy)) {
devres_free(ptr);
} else {
*ptr = psy;
devres_add(parent, ptr);
}
return psy;
}
EXPORT_SYMBOL_GPL(devm_power_supply_register);
/**
* devm_power_supply_register_no_ws() - Register managed non-waking-source power supply
* @parent: Device to be a parent of power supply's device, usually
* the device which probe function calls this
* @desc: Description of power supply, must be valid through whole
* lifetime of this power supply
* @cfg: Run-time specific configuration accessed during registering,
* may be NULL
*
* Return: A pointer to newly allocated power_supply on success
* or ERR_PTR otherwise.
* The returned power_supply pointer will be automatically unregistered
* on driver detach.
*/
struct power_supply *__must_check
devm_power_supply_register_no_ws(struct device *parent,
const struct power_supply_desc *desc,
const struct power_supply_config *cfg)
{
struct power_supply **ptr, *psy;
ptr = devres_alloc(devm_power_supply_release, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return ERR_PTR(-ENOMEM);
psy = __power_supply_register(parent, desc, cfg, false);
if (IS_ERR(psy)) {
devres_free(ptr);
} else {
*ptr = psy;
devres_add(parent, ptr);
}
return psy;
}
EXPORT_SYMBOL_GPL(devm_power_supply_register_no_ws);
/**
* power_supply_unregister() - Remove this power supply from system
* @psy: Pointer to power supply to unregister
*
* Remove this power supply from the system. The resources of power supply
* will be freed here or on last power_supply_put() call.
*/
void power_supply_unregister(struct power_supply *psy)
{
WARN_ON(atomic_dec_return(&psy->use_cnt));
psy->removing = true;
cancel_work_sync(&psy->changed_work);
cancel_delayed_work_sync(&psy->deferred_register_work);
sysfs_remove_link(&psy->dev.kobj, "powers");
power_supply_remove_hwmon_sysfs(psy);
power_supply_remove_triggers(psy);
psy_unregister_thermal(psy);
device_init_wakeup(&psy->dev, false);
device_unregister(&psy->dev);
}
EXPORT_SYMBOL_GPL(power_supply_unregister);
void *power_supply_get_drvdata(struct power_supply *psy)
{
return psy->drv_data;
}
EXPORT_SYMBOL_GPL(power_supply_get_drvdata);
static int __init power_supply_class_init(void)
{
power_supply_class = class_create("power_supply");
if (IS_ERR(power_supply_class))
return PTR_ERR(power_supply_class);
power_supply_class->dev_uevent = power_supply_uevent;
power_supply_init_attrs(&power_supply_dev_type);
return 0;
}
static void __exit power_supply_class_exit(void)
{
class_destroy(power_supply_class);
}
subsys_initcall(power_supply_class_init);
module_exit(power_supply_class_exit);
MODULE_DESCRIPTION("Universal power supply monitor class");
MODULE_AUTHOR("Ian Molton <[email protected]>, "
"Szabolcs Gyurko, "
"Anton Vorontsov <[email protected]>");
| linux-master | drivers/power/supply/power_supply_core.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Battery class driver for Apple PMU
*
* Copyright © 2006 David Woodhouse <[email protected]>
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/power_supply.h>
#include <linux/adb.h>
#include <linux/pmu.h>
#include <linux/slab.h>
static struct pmu_battery_dev {
struct power_supply *bat;
struct power_supply_desc bat_desc;
struct pmu_battery_info *pbi;
char name[16];
int propval;
} *pbats[PMU_MAX_BATTERIES];
#define to_pmu_battery_dev(x) power_supply_get_drvdata(x)
/*********************************************************************
* Power
*********************************************************************/
static int pmu_get_ac_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = (!!(pmu_power_flags & PMU_PWR_AC_PRESENT)) ||
(pmu_battery_count == 0);
break;
default:
return -EINVAL;
}
return 0;
}
static enum power_supply_property pmu_ac_props[] = {
POWER_SUPPLY_PROP_ONLINE,
};
static const struct power_supply_desc pmu_ac_desc = {
.name = "pmu-ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = pmu_ac_props,
.num_properties = ARRAY_SIZE(pmu_ac_props),
.get_property = pmu_get_ac_prop,
};
static struct power_supply *pmu_ac;
/*********************************************************************
* Battery properties
*********************************************************************/
static char *pmu_batt_types[] = {
"Smart", "Comet", "Hooper", "Unknown"
};
static char *pmu_bat_get_model_name(struct pmu_battery_info *pbi)
{
switch (pbi->flags & PMU_BATT_TYPE_MASK) {
case PMU_BATT_TYPE_SMART:
return pmu_batt_types[0];
case PMU_BATT_TYPE_COMET:
return pmu_batt_types[1];
case PMU_BATT_TYPE_HOOPER:
return pmu_batt_types[2];
default: break;
}
return pmu_batt_types[3];
}
static int pmu_bat_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct pmu_battery_dev *pbat = to_pmu_battery_dev(psy);
struct pmu_battery_info *pbi = pbat->pbi;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
if (pbi->flags & PMU_BATT_CHARGING)
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else if (pmu_power_flags & PMU_PWR_AC_PRESENT)
val->intval = POWER_SUPPLY_STATUS_FULL;
else
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = !!(pbi->flags & PMU_BATT_PRESENT);
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = pmu_bat_get_model_name(pbi);
break;
case POWER_SUPPLY_PROP_ENERGY_AVG:
val->intval = pbi->charge * 1000; /* mWh -> µWh */
break;
case POWER_SUPPLY_PROP_ENERGY_FULL:
val->intval = pbi->max_charge * 1000; /* mWh -> µWh */
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
val->intval = pbi->amperage * 1000; /* mA -> µA */
break;
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
val->intval = pbi->voltage * 1000; /* mV -> µV */
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
val->intval = pbi->time_remaining;
break;
default:
return -EINVAL;
}
return 0;
}
static enum power_supply_property pmu_bat_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_ENERGY_AVG,
POWER_SUPPLY_PROP_ENERGY_FULL,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
};
/*********************************************************************
* Initialisation
*********************************************************************/
static struct platform_device *bat_pdev;
static int __init pmu_bat_init(void)
{
int ret = 0;
int i;
bat_pdev = platform_device_register_simple("pmu-battery",
0, NULL, 0);
if (IS_ERR(bat_pdev)) {
ret = PTR_ERR(bat_pdev);
goto pdev_register_failed;
}
pmu_ac = power_supply_register(&bat_pdev->dev, &pmu_ac_desc, NULL);
if (IS_ERR(pmu_ac)) {
ret = PTR_ERR(pmu_ac);
goto ac_register_failed;
}
for (i = 0; i < pmu_battery_count; i++) {
struct power_supply_config psy_cfg = {};
struct pmu_battery_dev *pbat = kzalloc(sizeof(*pbat),
GFP_KERNEL);
if (!pbat)
break;
sprintf(pbat->name, "PMU_battery_%d", i);
pbat->bat_desc.name = pbat->name;
pbat->bat_desc.properties = pmu_bat_props;
pbat->bat_desc.num_properties = ARRAY_SIZE(pmu_bat_props);
pbat->bat_desc.get_property = pmu_bat_get_property;
pbat->pbi = &pmu_batteries[i];
psy_cfg.drv_data = pbat;
pbat->bat = power_supply_register(&bat_pdev->dev,
&pbat->bat_desc,
&psy_cfg);
if (IS_ERR(pbat->bat)) {
ret = PTR_ERR(pbat->bat);
kfree(pbat);
goto battery_register_failed;
}
pbats[i] = pbat;
}
goto success;
battery_register_failed:
while (i--) {
if (!pbats[i])
continue;
power_supply_unregister(pbats[i]->bat);
kfree(pbats[i]);
}
power_supply_unregister(pmu_ac);
ac_register_failed:
platform_device_unregister(bat_pdev);
pdev_register_failed:
success:
return ret;
}
static void __exit pmu_bat_exit(void)
{
int i;
for (i = 0; i < PMU_MAX_BATTERIES; i++) {
if (!pbats[i])
continue;
power_supply_unregister(pbats[i]->bat);
kfree(pbats[i]);
}
power_supply_unregister(pmu_ac);
platform_device_unregister(bat_pdev);
}
module_init(pmu_bat_init);
module_exit(pmu_bat_exit);
MODULE_AUTHOR("David Woodhouse <[email protected]>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("PMU battery driver");
| linux-master | drivers/power/supply/pmu_battery.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Power supply driver for testing.
*
* Copyright 2010 Anton Vorontsov <[email protected]>
*
* Dynamic module parameter code from the Virtual Battery Driver
* Copyright (C) 2008 Pylone, Inc.
* By: Masashi YOKOTA <[email protected]>
* Originally found here:
* http://downloads.pylone.jp/src/virtual_battery/virtual_battery-0.0.1.tar.bz2
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/power_supply.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <generated/utsrelease.h>
enum test_power_id {
TEST_AC,
TEST_BATTERY,
TEST_USB,
TEST_POWER_NUM,
};
static int ac_online = 1;
static int usb_online = 1;
static int battery_status = POWER_SUPPLY_STATUS_DISCHARGING;
static int battery_health = POWER_SUPPLY_HEALTH_GOOD;
static int battery_present = 1; /* true */
static int battery_technology = POWER_SUPPLY_TECHNOLOGY_LION;
static int battery_capacity = 50;
static int battery_voltage = 3300;
static int battery_charge_counter = -1000;
static int battery_current = -1600;
static bool module_initialized;
static int test_power_get_ac_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = ac_online;
break;
default:
return -EINVAL;
}
return 0;
}
static int test_power_get_usb_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = usb_online;
break;
default:
return -EINVAL;
}
return 0;
}
static int test_power_get_battery_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
switch (psp) {
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = "Test battery";
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = "Linux";
break;
case POWER_SUPPLY_PROP_SERIAL_NUMBER:
val->strval = UTS_RELEASE;
break;
case POWER_SUPPLY_PROP_STATUS:
val->intval = battery_status;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
case POWER_SUPPLY_PROP_HEALTH:
val->intval = battery_health;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = battery_present;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = battery_technology;
break;
case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
break;
case POWER_SUPPLY_PROP_CAPACITY:
case POWER_SUPPLY_PROP_CHARGE_NOW:
val->intval = battery_capacity;
break;
case POWER_SUPPLY_PROP_CHARGE_COUNTER:
val->intval = battery_charge_counter;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
case POWER_SUPPLY_PROP_CHARGE_FULL:
val->intval = 100;
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
val->intval = 3600;
break;
case POWER_SUPPLY_PROP_TEMP:
val->intval = 26;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = battery_voltage;
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
case POWER_SUPPLY_PROP_CURRENT_NOW:
val->intval = battery_current;
break;
default:
pr_info("%s: some properties deliberately report errors.\n",
__func__);
return -EINVAL;
}
return 0;
}
static enum power_supply_property test_power_ac_props[] = {
POWER_SUPPLY_PROP_ONLINE,
};
static enum power_supply_property test_power_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_COUNTER,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
static char *test_power_ac_supplied_to[] = {
"test_battery",
};
static struct power_supply *test_power_supplies[TEST_POWER_NUM];
static const struct power_supply_desc test_power_desc[] = {
[TEST_AC] = {
.name = "test_ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = test_power_ac_props,
.num_properties = ARRAY_SIZE(test_power_ac_props),
.get_property = test_power_get_ac_property,
},
[TEST_BATTERY] = {
.name = "test_battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = test_power_battery_props,
.num_properties = ARRAY_SIZE(test_power_battery_props),
.get_property = test_power_get_battery_property,
},
[TEST_USB] = {
.name = "test_usb",
.type = POWER_SUPPLY_TYPE_USB,
.properties = test_power_ac_props,
.num_properties = ARRAY_SIZE(test_power_ac_props),
.get_property = test_power_get_usb_property,
},
};
static const struct power_supply_config test_power_configs[] = {
{
/* test_ac */
.supplied_to = test_power_ac_supplied_to,
.num_supplicants = ARRAY_SIZE(test_power_ac_supplied_to),
}, {
/* test_battery */
}, {
/* test_usb */
.supplied_to = test_power_ac_supplied_to,
.num_supplicants = ARRAY_SIZE(test_power_ac_supplied_to),
},
};
static int __init test_power_init(void)
{
int i;
int ret;
BUILD_BUG_ON(TEST_POWER_NUM != ARRAY_SIZE(test_power_supplies));
BUILD_BUG_ON(TEST_POWER_NUM != ARRAY_SIZE(test_power_configs));
for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++) {
test_power_supplies[i] = power_supply_register(NULL,
&test_power_desc[i],
&test_power_configs[i]);
if (IS_ERR(test_power_supplies[i])) {
pr_err("%s: failed to register %s\n", __func__,
test_power_desc[i].name);
ret = PTR_ERR(test_power_supplies[i]);
goto failed;
}
}
module_initialized = true;
return 0;
failed:
while (--i >= 0)
power_supply_unregister(test_power_supplies[i]);
return ret;
}
module_init(test_power_init);
static void __exit test_power_exit(void)
{
int i;
/* Let's see how we handle changes... */
ac_online = 0;
usb_online = 0;
battery_status = POWER_SUPPLY_STATUS_DISCHARGING;
for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++)
power_supply_changed(test_power_supplies[i]);
pr_info("%s: 'changed' event sent, sleeping for 10 seconds...\n",
__func__);
ssleep(10);
for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++)
power_supply_unregister(test_power_supplies[i]);
module_initialized = false;
}
module_exit(test_power_exit);
#define MAX_KEYLENGTH 256
struct battery_property_map {
int value;
char const *key;
};
static struct battery_property_map map_ac_online[] = {
{ 0, "off" },
{ 1, "on" },
{ -1, NULL },
};
static struct battery_property_map map_status[] = {
{ POWER_SUPPLY_STATUS_CHARGING, "charging" },
{ POWER_SUPPLY_STATUS_DISCHARGING, "discharging" },
{ POWER_SUPPLY_STATUS_NOT_CHARGING, "not-charging" },
{ POWER_SUPPLY_STATUS_FULL, "full" },
{ -1, NULL },
};
static struct battery_property_map map_health[] = {
{ POWER_SUPPLY_HEALTH_GOOD, "good" },
{ POWER_SUPPLY_HEALTH_OVERHEAT, "overheat" },
{ POWER_SUPPLY_HEALTH_DEAD, "dead" },
{ POWER_SUPPLY_HEALTH_OVERVOLTAGE, "overvoltage" },
{ POWER_SUPPLY_HEALTH_UNSPEC_FAILURE, "failure" },
{ -1, NULL },
};
static struct battery_property_map map_present[] = {
{ 0, "false" },
{ 1, "true" },
{ -1, NULL },
};
static struct battery_property_map map_technology[] = {
{ POWER_SUPPLY_TECHNOLOGY_NiMH, "NiMH" },
{ POWER_SUPPLY_TECHNOLOGY_LION, "LION" },
{ POWER_SUPPLY_TECHNOLOGY_LIPO, "LIPO" },
{ POWER_SUPPLY_TECHNOLOGY_LiFe, "LiFe" },
{ POWER_SUPPLY_TECHNOLOGY_NiCd, "NiCd" },
{ POWER_SUPPLY_TECHNOLOGY_LiMn, "LiMn" },
{ -1, NULL },
};
static int map_get_value(struct battery_property_map *map, const char *key,
int def_val)
{
char buf[MAX_KEYLENGTH];
int cr;
strscpy(buf, key, MAX_KEYLENGTH);
cr = strnlen(buf, MAX_KEYLENGTH) - 1;
if (cr < 0)
return def_val;
if (buf[cr] == '\n')
buf[cr] = '\0';
while (map->key) {
if (strncasecmp(map->key, buf, MAX_KEYLENGTH) == 0)
return map->value;
map++;
}
return def_val;
}
static const char *map_get_key(struct battery_property_map *map, int value,
const char *def_key)
{
while (map->key) {
if (map->value == value)
return map->key;
map++;
}
return def_key;
}
static inline void signal_power_supply_changed(struct power_supply *psy)
{
if (module_initialized)
power_supply_changed(psy);
}
static int param_set_ac_online(const char *key, const struct kernel_param *kp)
{
ac_online = map_get_value(map_ac_online, key, ac_online);
signal_power_supply_changed(test_power_supplies[TEST_AC]);
return 0;
}
static int param_get_ac_online(char *buffer, const struct kernel_param *kp)
{
return sprintf(buffer, "%s\n",
map_get_key(map_ac_online, ac_online, "unknown"));
}
static int param_set_usb_online(const char *key, const struct kernel_param *kp)
{
usb_online = map_get_value(map_ac_online, key, usb_online);
signal_power_supply_changed(test_power_supplies[TEST_USB]);
return 0;
}
static int param_get_usb_online(char *buffer, const struct kernel_param *kp)
{
return sprintf(buffer, "%s\n",
map_get_key(map_ac_online, usb_online, "unknown"));
}
static int param_set_battery_status(const char *key,
const struct kernel_param *kp)
{
battery_status = map_get_value(map_status, key, battery_status);
signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
return 0;
}
static int param_get_battery_status(char *buffer, const struct kernel_param *kp)
{
return sprintf(buffer, "%s\n",
map_get_key(map_ac_online, battery_status, "unknown"));
}
static int param_set_battery_health(const char *key,
const struct kernel_param *kp)
{
battery_health = map_get_value(map_health, key, battery_health);
signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
return 0;
}
static int param_get_battery_health(char *buffer, const struct kernel_param *kp)
{
return sprintf(buffer, "%s\n",
map_get_key(map_ac_online, battery_health, "unknown"));
}
static int param_set_battery_present(const char *key,
const struct kernel_param *kp)
{
battery_present = map_get_value(map_present, key, battery_present);
signal_power_supply_changed(test_power_supplies[TEST_AC]);
return 0;
}
static int param_get_battery_present(char *buffer,
const struct kernel_param *kp)
{
return sprintf(buffer, "%s\n",
map_get_key(map_ac_online, battery_present, "unknown"));
}
static int param_set_battery_technology(const char *key,
const struct kernel_param *kp)
{
battery_technology = map_get_value(map_technology, key,
battery_technology);
signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
return 0;
}
static int param_get_battery_technology(char *buffer,
const struct kernel_param *kp)
{
return sprintf(buffer, "%s\n",
map_get_key(map_ac_online, battery_technology,
"unknown"));
}
static int param_set_battery_capacity(const char *key,
const struct kernel_param *kp)
{
int tmp;
if (1 != sscanf(key, "%d", &tmp))
return -EINVAL;
battery_capacity = tmp;
signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
return 0;
}
#define param_get_battery_capacity param_get_int
static int param_set_battery_voltage(const char *key,
const struct kernel_param *kp)
{
int tmp;
if (1 != sscanf(key, "%d", &tmp))
return -EINVAL;
battery_voltage = tmp;
signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
return 0;
}
#define param_get_battery_voltage param_get_int
static int param_set_battery_charge_counter(const char *key,
const struct kernel_param *kp)
{
int tmp;
if (1 != sscanf(key, "%d", &tmp))
return -EINVAL;
battery_charge_counter = tmp;
signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
return 0;
}
#define param_get_battery_charge_counter param_get_int
static int param_set_battery_current(const char *key,
const struct kernel_param *kp)
{
int tmp;
if (1 != sscanf(key, "%d", &tmp))
return -EINVAL;
battery_current = tmp;
signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
return 0;
}
#define param_get_battery_current param_get_int
static const struct kernel_param_ops param_ops_ac_online = {
.set = param_set_ac_online,
.get = param_get_ac_online,
};
static const struct kernel_param_ops param_ops_usb_online = {
.set = param_set_usb_online,
.get = param_get_usb_online,
};
static const struct kernel_param_ops param_ops_battery_status = {
.set = param_set_battery_status,
.get = param_get_battery_status,
};
static const struct kernel_param_ops param_ops_battery_present = {
.set = param_set_battery_present,
.get = param_get_battery_present,
};
static const struct kernel_param_ops param_ops_battery_technology = {
.set = param_set_battery_technology,
.get = param_get_battery_technology,
};
static const struct kernel_param_ops param_ops_battery_health = {
.set = param_set_battery_health,
.get = param_get_battery_health,
};
static const struct kernel_param_ops param_ops_battery_capacity = {
.set = param_set_battery_capacity,
.get = param_get_battery_capacity,
};
static const struct kernel_param_ops param_ops_battery_voltage = {
.set = param_set_battery_voltage,
.get = param_get_battery_voltage,
};
static const struct kernel_param_ops param_ops_battery_charge_counter = {
.set = param_set_battery_charge_counter,
.get = param_get_battery_charge_counter,
};
static const struct kernel_param_ops param_ops_battery_current = {
.set = param_set_battery_current,
.get = param_get_battery_current,
};
#define param_check_ac_online(name, p) __param_check(name, p, void);
#define param_check_usb_online(name, p) __param_check(name, p, void);
#define param_check_battery_status(name, p) __param_check(name, p, void);
#define param_check_battery_present(name, p) __param_check(name, p, void);
#define param_check_battery_technology(name, p) __param_check(name, p, void);
#define param_check_battery_health(name, p) __param_check(name, p, void);
#define param_check_battery_capacity(name, p) __param_check(name, p, void);
#define param_check_battery_voltage(name, p) __param_check(name, p, void);
#define param_check_battery_charge_counter(name, p) __param_check(name, p, void);
#define param_check_battery_current(name, p) __param_check(name, p, void);
module_param(ac_online, ac_online, 0644);
MODULE_PARM_DESC(ac_online, "AC charging state <on|off>");
module_param(usb_online, usb_online, 0644);
MODULE_PARM_DESC(usb_online, "USB charging state <on|off>");
module_param(battery_status, battery_status, 0644);
MODULE_PARM_DESC(battery_status,
"battery status <charging|discharging|not-charging|full>");
module_param(battery_present, battery_present, 0644);
MODULE_PARM_DESC(battery_present,
"battery presence state <good|overheat|dead|overvoltage|failure>");
module_param(battery_technology, battery_technology, 0644);
MODULE_PARM_DESC(battery_technology,
"battery technology <NiMH|LION|LIPO|LiFe|NiCd|LiMn>");
module_param(battery_health, battery_health, 0644);
MODULE_PARM_DESC(battery_health,
"battery health state <good|overheat|dead|overvoltage|failure>");
module_param(battery_capacity, battery_capacity, 0644);
MODULE_PARM_DESC(battery_capacity, "battery capacity (percentage)");
module_param(battery_voltage, battery_voltage, 0644);
MODULE_PARM_DESC(battery_voltage, "battery voltage (millivolts)");
module_param(battery_charge_counter, battery_charge_counter, 0644);
MODULE_PARM_DESC(battery_charge_counter,
"battery charge counter (microampere-hours)");
module_param(battery_current, battery_current, 0644);
MODULE_PARM_DESC(battery_current, "battery current (milliampere)");
MODULE_DESCRIPTION("Power supply driver for testing");
MODULE_AUTHOR("Anton Vorontsov <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/test_power.c |
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2014, Sony Mobile Communications Inc.
*
* This driver is for the multi-block Switch-Mode Battery Charger and Boost
* (SMBB) hardware, found in Qualcomm PM8941 PMICs. The charger is an
* integrated, single-cell lithium-ion battery charger.
*
* Sub-components:
* - Charger core
* - Buck
* - DC charge-path
* - USB charge-path
* - Battery interface
* - Boost (not implemented)
* - Misc
* - HF-Buck
*/
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/extcon-provider.h>
#include <linux/regulator/driver.h>
#define SMBB_CHG_VMAX 0x040
#define SMBB_CHG_VSAFE 0x041
#define SMBB_CHG_CFG 0x043
#define SMBB_CHG_IMAX 0x044
#define SMBB_CHG_ISAFE 0x045
#define SMBB_CHG_VIN_MIN 0x047
#define SMBB_CHG_CTRL 0x049
#define CTRL_EN BIT(7)
#define SMBB_CHG_VBAT_WEAK 0x052
#define SMBB_CHG_IBAT_TERM_CHG 0x05b
#define IBAT_TERM_CHG_IEOC BIT(7)
#define IBAT_TERM_CHG_IEOC_BMS BIT(7)
#define IBAT_TERM_CHG_IEOC_CHG 0
#define SMBB_CHG_VBAT_DET 0x05d
#define SMBB_CHG_TCHG_MAX_EN 0x060
#define TCHG_MAX_EN BIT(7)
#define SMBB_CHG_WDOG_TIME 0x062
#define SMBB_CHG_WDOG_EN 0x065
#define WDOG_EN BIT(7)
#define SMBB_BUCK_REG_MODE 0x174
#define BUCK_REG_MODE BIT(0)
#define BUCK_REG_MODE_VBAT BIT(0)
#define BUCK_REG_MODE_VSYS 0
#define SMBB_BAT_PRES_STATUS 0x208
#define PRES_STATUS_BAT_PRES BIT(7)
#define SMBB_BAT_TEMP_STATUS 0x209
#define TEMP_STATUS_OK BIT(7)
#define TEMP_STATUS_HOT BIT(6)
#define SMBB_BAT_BTC_CTRL 0x249
#define BTC_CTRL_COMP_EN BIT(7)
#define BTC_CTRL_COLD_EXT BIT(1)
#define BTC_CTRL_HOT_EXT_N BIT(0)
#define SMBB_USB_IMAX 0x344
#define SMBB_USB_OTG_CTL 0x348
#define OTG_CTL_EN BIT(0)
#define SMBB_USB_ENUM_TIMER_STOP 0x34e
#define ENUM_TIMER_STOP BIT(0)
#define SMBB_USB_SEC_ACCESS 0x3d0
#define SEC_ACCESS_MAGIC 0xa5
#define SMBB_USB_REV_BST 0x3ed
#define REV_BST_CHG_GONE BIT(7)
#define SMBB_DC_IMAX 0x444
#define SMBB_MISC_REV2 0x601
#define SMBB_MISC_BOOT_DONE 0x642
#define BOOT_DONE BIT(7)
#define STATUS_USBIN_VALID BIT(0) /* USB connection is valid */
#define STATUS_DCIN_VALID BIT(1) /* DC connection is valid */
#define STATUS_BAT_HOT BIT(2) /* Battery temp 1=Hot, 0=Cold */
#define STATUS_BAT_OK BIT(3) /* Battery temp OK */
#define STATUS_BAT_PRESENT BIT(4) /* Battery is present */
#define STATUS_CHG_DONE BIT(5) /* Charge cycle is complete */
#define STATUS_CHG_TRKL BIT(6) /* Trickle charging */
#define STATUS_CHG_FAST BIT(7) /* Fast charging */
#define STATUS_CHG_GONE BIT(8) /* No charger is connected */
enum smbb_attr {
ATTR_BAT_ISAFE,
ATTR_BAT_IMAX,
ATTR_USBIN_IMAX,
ATTR_DCIN_IMAX,
ATTR_BAT_VSAFE,
ATTR_BAT_VMAX,
ATTR_BAT_VMIN,
ATTR_CHG_VDET,
ATTR_VIN_MIN,
_ATTR_CNT,
};
struct smbb_charger {
unsigned int revision;
unsigned int addr;
struct device *dev;
struct extcon_dev *edev;
bool dc_disabled;
bool jeita_ext_temp;
unsigned long status;
struct mutex statlock;
unsigned int attr[_ATTR_CNT];
struct power_supply *usb_psy;
struct power_supply *dc_psy;
struct power_supply *bat_psy;
struct regmap *regmap;
struct regulator_desc otg_rdesc;
struct regulator_dev *otg_reg;
};
static const unsigned int smbb_usb_extcon_cable[] = {
EXTCON_USB,
EXTCON_NONE,
};
static int smbb_vbat_weak_fn(unsigned int index)
{
return 2100000 + index * 100000;
}
static int smbb_vin_fn(unsigned int index)
{
if (index > 42)
return 5600000 + (index - 43) * 200000;
return 3400000 + index * 50000;
}
static int smbb_vmax_fn(unsigned int index)
{
return 3240000 + index * 10000;
}
static int smbb_vbat_det_fn(unsigned int index)
{
return 3240000 + index * 20000;
}
static int smbb_imax_fn(unsigned int index)
{
if (index < 2)
return 100000 + index * 50000;
return index * 100000;
}
static int smbb_bat_imax_fn(unsigned int index)
{
return index * 50000;
}
static unsigned int smbb_hw_lookup(unsigned int val, int (*fn)(unsigned int))
{
unsigned int widx;
unsigned int sel;
for (widx = sel = 0; (*fn)(widx) <= val; ++widx)
sel = widx;
return sel;
}
static const struct smbb_charger_attr {
const char *name;
unsigned int reg;
unsigned int safe_reg;
unsigned int max;
unsigned int min;
unsigned int fail_ok;
int (*hw_fn)(unsigned int);
} smbb_charger_attrs[] = {
[ATTR_BAT_ISAFE] = {
.name = "qcom,fast-charge-safe-current",
.reg = SMBB_CHG_ISAFE,
.max = 3000000,
.min = 200000,
.hw_fn = smbb_bat_imax_fn,
.fail_ok = 1,
},
[ATTR_BAT_IMAX] = {
.name = "qcom,fast-charge-current-limit",
.reg = SMBB_CHG_IMAX,
.safe_reg = SMBB_CHG_ISAFE,
.max = 3000000,
.min = 200000,
.hw_fn = smbb_bat_imax_fn,
},
[ATTR_DCIN_IMAX] = {
.name = "qcom,dc-current-limit",
.reg = SMBB_DC_IMAX,
.max = 2500000,
.min = 100000,
.hw_fn = smbb_imax_fn,
},
[ATTR_BAT_VSAFE] = {
.name = "qcom,fast-charge-safe-voltage",
.reg = SMBB_CHG_VSAFE,
.max = 5000000,
.min = 3240000,
.hw_fn = smbb_vmax_fn,
.fail_ok = 1,
},
[ATTR_BAT_VMAX] = {
.name = "qcom,fast-charge-high-threshold-voltage",
.reg = SMBB_CHG_VMAX,
.safe_reg = SMBB_CHG_VSAFE,
.max = 5000000,
.min = 3240000,
.hw_fn = smbb_vmax_fn,
},
[ATTR_BAT_VMIN] = {
.name = "qcom,fast-charge-low-threshold-voltage",
.reg = SMBB_CHG_VBAT_WEAK,
.max = 3600000,
.min = 2100000,
.hw_fn = smbb_vbat_weak_fn,
},
[ATTR_CHG_VDET] = {
.name = "qcom,auto-recharge-threshold-voltage",
.reg = SMBB_CHG_VBAT_DET,
.max = 5000000,
.min = 3240000,
.hw_fn = smbb_vbat_det_fn,
},
[ATTR_VIN_MIN] = {
.name = "qcom,minimum-input-voltage",
.reg = SMBB_CHG_VIN_MIN,
.max = 9600000,
.min = 4200000,
.hw_fn = smbb_vin_fn,
},
[ATTR_USBIN_IMAX] = {
.name = "usb-charge-current-limit",
.reg = SMBB_USB_IMAX,
.max = 2500000,
.min = 100000,
.hw_fn = smbb_imax_fn,
},
};
static int smbb_charger_attr_write(struct smbb_charger *chg,
enum smbb_attr which, unsigned int val)
{
const struct smbb_charger_attr *prop;
unsigned int wval;
unsigned int out;
int rc;
prop = &smbb_charger_attrs[which];
if (val > prop->max || val < prop->min) {
dev_err(chg->dev, "value out of range for %s [%u:%u]\n",
prop->name, prop->min, prop->max);
return -EINVAL;
}
if (prop->safe_reg) {
rc = regmap_read(chg->regmap,
chg->addr + prop->safe_reg, &wval);
if (rc) {
dev_err(chg->dev,
"unable to read safe value for '%s'\n",
prop->name);
return rc;
}
wval = prop->hw_fn(wval);
if (val > wval) {
dev_warn(chg->dev,
"%s above safe value, clamping at %u\n",
prop->name, wval);
val = wval;
}
}
wval = smbb_hw_lookup(val, prop->hw_fn);
rc = regmap_write(chg->regmap, chg->addr + prop->reg, wval);
if (rc) {
dev_err(chg->dev, "unable to update %s", prop->name);
return rc;
}
out = prop->hw_fn(wval);
if (out != val) {
dev_warn(chg->dev,
"%s inaccurate, rounded to %u\n",
prop->name, out);
}
dev_dbg(chg->dev, "%s <= %d\n", prop->name, out);
chg->attr[which] = out;
return 0;
}
static int smbb_charger_attr_read(struct smbb_charger *chg,
enum smbb_attr which)
{
const struct smbb_charger_attr *prop;
unsigned int val;
int rc;
prop = &smbb_charger_attrs[which];
rc = regmap_read(chg->regmap, chg->addr + prop->reg, &val);
if (rc) {
dev_err(chg->dev, "failed to read %s\n", prop->name);
return rc;
}
val = prop->hw_fn(val);
dev_dbg(chg->dev, "%s => %d\n", prop->name, val);
chg->attr[which] = val;
return 0;
}
static int smbb_charger_attr_parse(struct smbb_charger *chg,
enum smbb_attr which)
{
const struct smbb_charger_attr *prop;
unsigned int val;
int rc;
prop = &smbb_charger_attrs[which];
rc = of_property_read_u32(chg->dev->of_node, prop->name, &val);
if (rc == 0) {
rc = smbb_charger_attr_write(chg, which, val);
if (!rc || !prop->fail_ok)
return rc;
}
return smbb_charger_attr_read(chg, which);
}
static void smbb_set_line_flag(struct smbb_charger *chg, int irq, int flag)
{
bool state;
int ret;
ret = irq_get_irqchip_state(irq, IRQCHIP_STATE_LINE_LEVEL, &state);
if (ret < 0) {
dev_err(chg->dev, "failed to read irq line\n");
return;
}
mutex_lock(&chg->statlock);
if (state)
chg->status |= flag;
else
chg->status &= ~flag;
mutex_unlock(&chg->statlock);
dev_dbg(chg->dev, "status = %03lx\n", chg->status);
}
static irqreturn_t smbb_usb_valid_handler(int irq, void *_data)
{
struct smbb_charger *chg = _data;
smbb_set_line_flag(chg, irq, STATUS_USBIN_VALID);
extcon_set_state_sync(chg->edev, EXTCON_USB,
chg->status & STATUS_USBIN_VALID);
power_supply_changed(chg->usb_psy);
return IRQ_HANDLED;
}
static irqreturn_t smbb_dc_valid_handler(int irq, void *_data)
{
struct smbb_charger *chg = _data;
smbb_set_line_flag(chg, irq, STATUS_DCIN_VALID);
if (!chg->dc_disabled)
power_supply_changed(chg->dc_psy);
return IRQ_HANDLED;
}
static irqreturn_t smbb_bat_temp_handler(int irq, void *_data)
{
struct smbb_charger *chg = _data;
unsigned int val;
int rc;
rc = regmap_read(chg->regmap, chg->addr + SMBB_BAT_TEMP_STATUS, &val);
if (rc)
return IRQ_HANDLED;
mutex_lock(&chg->statlock);
if (val & TEMP_STATUS_OK) {
chg->status |= STATUS_BAT_OK;
} else {
chg->status &= ~STATUS_BAT_OK;
if (val & TEMP_STATUS_HOT)
chg->status |= STATUS_BAT_HOT;
}
mutex_unlock(&chg->statlock);
power_supply_changed(chg->bat_psy);
return IRQ_HANDLED;
}
static irqreturn_t smbb_bat_present_handler(int irq, void *_data)
{
struct smbb_charger *chg = _data;
smbb_set_line_flag(chg, irq, STATUS_BAT_PRESENT);
power_supply_changed(chg->bat_psy);
return IRQ_HANDLED;
}
static irqreturn_t smbb_chg_done_handler(int irq, void *_data)
{
struct smbb_charger *chg = _data;
smbb_set_line_flag(chg, irq, STATUS_CHG_DONE);
power_supply_changed(chg->bat_psy);
return IRQ_HANDLED;
}
static irqreturn_t smbb_chg_gone_handler(int irq, void *_data)
{
struct smbb_charger *chg = _data;
smbb_set_line_flag(chg, irq, STATUS_CHG_GONE);
power_supply_changed(chg->bat_psy);
power_supply_changed(chg->usb_psy);
if (!chg->dc_disabled)
power_supply_changed(chg->dc_psy);
return IRQ_HANDLED;
}
static irqreturn_t smbb_chg_fast_handler(int irq, void *_data)
{
struct smbb_charger *chg = _data;
smbb_set_line_flag(chg, irq, STATUS_CHG_FAST);
power_supply_changed(chg->bat_psy);
return IRQ_HANDLED;
}
static irqreturn_t smbb_chg_trkl_handler(int irq, void *_data)
{
struct smbb_charger *chg = _data;
smbb_set_line_flag(chg, irq, STATUS_CHG_TRKL);
power_supply_changed(chg->bat_psy);
return IRQ_HANDLED;
}
static const struct smbb_irq {
const char *name;
irqreturn_t (*handler)(int, void *);
} smbb_charger_irqs[] = {
{ "chg-done", smbb_chg_done_handler },
{ "chg-fast", smbb_chg_fast_handler },
{ "chg-trkl", smbb_chg_trkl_handler },
{ "bat-temp-ok", smbb_bat_temp_handler },
{ "bat-present", smbb_bat_present_handler },
{ "chg-gone", smbb_chg_gone_handler },
{ "usb-valid", smbb_usb_valid_handler },
{ "dc-valid", smbb_dc_valid_handler },
};
static int smbb_usbin_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct smbb_charger *chg = power_supply_get_drvdata(psy);
int rc = 0;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
mutex_lock(&chg->statlock);
val->intval = !(chg->status & STATUS_CHG_GONE) &&
(chg->status & STATUS_USBIN_VALID);
mutex_unlock(&chg->statlock);
break;
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
val->intval = chg->attr[ATTR_USBIN_IMAX];
break;
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
val->intval = 2500000;
break;
default:
rc = -EINVAL;
break;
}
return rc;
}
static int smbb_usbin_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct smbb_charger *chg = power_supply_get_drvdata(psy);
int rc;
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
rc = smbb_charger_attr_write(chg, ATTR_USBIN_IMAX,
val->intval);
break;
default:
rc = -EINVAL;
break;
}
return rc;
}
static int smbb_dcin_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct smbb_charger *chg = power_supply_get_drvdata(psy);
int rc = 0;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
mutex_lock(&chg->statlock);
val->intval = !(chg->status & STATUS_CHG_GONE) &&
(chg->status & STATUS_DCIN_VALID);
mutex_unlock(&chg->statlock);
break;
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
val->intval = chg->attr[ATTR_DCIN_IMAX];
break;
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
val->intval = 2500000;
break;
default:
rc = -EINVAL;
break;
}
return rc;
}
static int smbb_dcin_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct smbb_charger *chg = power_supply_get_drvdata(psy);
int rc;
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
rc = smbb_charger_attr_write(chg, ATTR_DCIN_IMAX,
val->intval);
break;
default:
rc = -EINVAL;
break;
}
return rc;
}
static int smbb_charger_writable_property(struct power_supply *psy,
enum power_supply_property psp)
{
return psp == POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT;
}
static int smbb_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct smbb_charger *chg = power_supply_get_drvdata(psy);
unsigned long status;
int rc = 0;
mutex_lock(&chg->statlock);
status = chg->status;
mutex_unlock(&chg->statlock);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
if (status & STATUS_CHG_GONE)
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
else if (!(status & (STATUS_DCIN_VALID | STATUS_USBIN_VALID)))
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
else if (status & STATUS_CHG_DONE)
val->intval = POWER_SUPPLY_STATUS_FULL;
else if (!(status & STATUS_BAT_OK))
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
else if (status & (STATUS_CHG_FAST | STATUS_CHG_TRKL))
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else /* everything is ok for charging, but we are not... */
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
break;
case POWER_SUPPLY_PROP_HEALTH:
if (status & STATUS_BAT_OK)
val->intval = POWER_SUPPLY_HEALTH_GOOD;
else if (status & STATUS_BAT_HOT)
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
else
val->intval = POWER_SUPPLY_HEALTH_COLD;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
if (status & STATUS_CHG_FAST)
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
else if (status & STATUS_CHG_TRKL)
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
else
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = !!(status & STATUS_BAT_PRESENT);
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
val->intval = chg->attr[ATTR_BAT_IMAX];
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
val->intval = chg->attr[ATTR_BAT_VMAX];
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
/* this charger is a single-cell lithium-ion battery charger
* only. If you hook up some other technology, there will be
* fireworks.
*/
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
val->intval = 3000000; /* single-cell li-ion low end */
break;
default:
rc = -EINVAL;
break;
}
return rc;
}
static int smbb_battery_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct smbb_charger *chg = power_supply_get_drvdata(psy);
int rc;
switch (psp) {
case POWER_SUPPLY_PROP_CURRENT_MAX:
rc = smbb_charger_attr_write(chg, ATTR_BAT_IMAX, val->intval);
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
rc = smbb_charger_attr_write(chg, ATTR_BAT_VMAX, val->intval);
break;
default:
rc = -EINVAL;
break;
}
return rc;
}
static int smbb_battery_writable_property(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_CURRENT_MAX:
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
return 1;
default:
return 0;
}
}
static enum power_supply_property smbb_charger_properties[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
};
static enum power_supply_property smbb_battery_properties[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_VOLTAGE_MAX,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_TECHNOLOGY,
};
static const struct reg_off_mask_default {
unsigned int offset;
unsigned int mask;
unsigned int value;
unsigned int rev_mask;
} smbb_charger_setup[] = {
/* The bootloader is supposed to set this... make sure anyway. */
{ SMBB_MISC_BOOT_DONE, BOOT_DONE, BOOT_DONE },
/* Disable software timer */
{ SMBB_CHG_TCHG_MAX_EN, TCHG_MAX_EN, 0 },
/* Clear and disable watchdog */
{ SMBB_CHG_WDOG_TIME, 0xff, 160 },
{ SMBB_CHG_WDOG_EN, WDOG_EN, 0 },
/* Use charger based EoC detection */
{ SMBB_CHG_IBAT_TERM_CHG, IBAT_TERM_CHG_IEOC, IBAT_TERM_CHG_IEOC_CHG },
/* Disable GSM PA load adjustment.
* The PA signal is incorrectly connected on v2.
*/
{ SMBB_CHG_CFG, 0xff, 0x00, BIT(3) },
/* Use VBAT (not VSYS) to compensate for IR drop during fast charging */
{ SMBB_BUCK_REG_MODE, BUCK_REG_MODE, BUCK_REG_MODE_VBAT },
/* Enable battery temperature comparators */
{ SMBB_BAT_BTC_CTRL, BTC_CTRL_COMP_EN, BTC_CTRL_COMP_EN },
/* Stop USB enumeration timer */
{ SMBB_USB_ENUM_TIMER_STOP, ENUM_TIMER_STOP, ENUM_TIMER_STOP },
#if 0 /* FIXME supposedly only to disable hardware ARB termination */
{ SMBB_USB_SEC_ACCESS, SEC_ACCESS_MAGIC },
{ SMBB_USB_REV_BST, 0xff, REV_BST_CHG_GONE },
#endif
/* Stop USB enumeration timer, again */
{ SMBB_USB_ENUM_TIMER_STOP, ENUM_TIMER_STOP, ENUM_TIMER_STOP },
/* Enable charging */
{ SMBB_CHG_CTRL, CTRL_EN, CTRL_EN },
};
static char *smbb_bif[] = { "smbb-bif" };
static const struct power_supply_desc bat_psy_desc = {
.name = "smbb-bif",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = smbb_battery_properties,
.num_properties = ARRAY_SIZE(smbb_battery_properties),
.get_property = smbb_battery_get_property,
.set_property = smbb_battery_set_property,
.property_is_writeable = smbb_battery_writable_property,
};
static const struct power_supply_desc usb_psy_desc = {
.name = "smbb-usbin",
.type = POWER_SUPPLY_TYPE_USB,
.properties = smbb_charger_properties,
.num_properties = ARRAY_SIZE(smbb_charger_properties),
.get_property = smbb_usbin_get_property,
.set_property = smbb_usbin_set_property,
.property_is_writeable = smbb_charger_writable_property,
};
static const struct power_supply_desc dc_psy_desc = {
.name = "smbb-dcin",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = smbb_charger_properties,
.num_properties = ARRAY_SIZE(smbb_charger_properties),
.get_property = smbb_dcin_get_property,
.set_property = smbb_dcin_set_property,
.property_is_writeable = smbb_charger_writable_property,
};
static int smbb_chg_otg_enable(struct regulator_dev *rdev)
{
struct smbb_charger *chg = rdev_get_drvdata(rdev);
int rc;
rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_USB_OTG_CTL,
OTG_CTL_EN, OTG_CTL_EN);
if (rc)
dev_err(chg->dev, "failed to update OTG_CTL\n");
return rc;
}
static int smbb_chg_otg_disable(struct regulator_dev *rdev)
{
struct smbb_charger *chg = rdev_get_drvdata(rdev);
int rc;
rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_USB_OTG_CTL,
OTG_CTL_EN, 0);
if (rc)
dev_err(chg->dev, "failed to update OTG_CTL\n");
return rc;
}
static int smbb_chg_otg_is_enabled(struct regulator_dev *rdev)
{
struct smbb_charger *chg = rdev_get_drvdata(rdev);
unsigned int value = 0;
int rc;
rc = regmap_read(chg->regmap, chg->addr + SMBB_USB_OTG_CTL, &value);
if (rc)
dev_err(chg->dev, "failed to read OTG_CTL\n");
return !!(value & OTG_CTL_EN);
}
static const struct regulator_ops smbb_chg_otg_ops = {
.enable = smbb_chg_otg_enable,
.disable = smbb_chg_otg_disable,
.is_enabled = smbb_chg_otg_is_enabled,
};
static int smbb_charger_probe(struct platform_device *pdev)
{
struct power_supply_config bat_cfg = {};
struct power_supply_config usb_cfg = {};
struct power_supply_config dc_cfg = {};
struct smbb_charger *chg;
struct regulator_config config = { };
int rc, i;
chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL);
if (!chg)
return -ENOMEM;
chg->dev = &pdev->dev;
mutex_init(&chg->statlock);
chg->regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!chg->regmap) {
dev_err(&pdev->dev, "failed to locate regmap\n");
return -ENODEV;
}
rc = of_property_read_u32(pdev->dev.of_node, "reg", &chg->addr);
if (rc) {
dev_err(&pdev->dev, "missing or invalid 'reg' property\n");
return rc;
}
rc = regmap_read(chg->regmap, chg->addr + SMBB_MISC_REV2, &chg->revision);
if (rc) {
dev_err(&pdev->dev, "unable to read revision\n");
return rc;
}
chg->revision += 1;
if (chg->revision != 1 && chg->revision != 2 && chg->revision != 3) {
dev_err(&pdev->dev, "v%d hardware not supported\n", chg->revision);
return -ENODEV;
}
dev_info(&pdev->dev, "Initializing SMBB rev %u", chg->revision);
chg->dc_disabled = of_property_read_bool(pdev->dev.of_node, "qcom,disable-dc");
for (i = 0; i < _ATTR_CNT; ++i) {
rc = smbb_charger_attr_parse(chg, i);
if (rc) {
dev_err(&pdev->dev, "failed to parse/apply settings\n");
return rc;
}
}
bat_cfg.drv_data = chg;
bat_cfg.of_node = pdev->dev.of_node;
chg->bat_psy = devm_power_supply_register(&pdev->dev,
&bat_psy_desc,
&bat_cfg);
if (IS_ERR(chg->bat_psy)) {
dev_err(&pdev->dev, "failed to register battery\n");
return PTR_ERR(chg->bat_psy);
}
usb_cfg.drv_data = chg;
usb_cfg.supplied_to = smbb_bif;
usb_cfg.num_supplicants = ARRAY_SIZE(smbb_bif);
chg->usb_psy = devm_power_supply_register(&pdev->dev,
&usb_psy_desc,
&usb_cfg);
if (IS_ERR(chg->usb_psy)) {
dev_err(&pdev->dev, "failed to register USB power supply\n");
return PTR_ERR(chg->usb_psy);
}
chg->edev = devm_extcon_dev_allocate(&pdev->dev, smbb_usb_extcon_cable);
if (IS_ERR(chg->edev)) {
dev_err(&pdev->dev, "failed to allocate extcon device\n");
return -ENOMEM;
}
rc = devm_extcon_dev_register(&pdev->dev, chg->edev);
if (rc < 0) {
dev_err(&pdev->dev, "failed to register extcon device\n");
return rc;
}
if (!chg->dc_disabled) {
dc_cfg.drv_data = chg;
dc_cfg.supplied_to = smbb_bif;
dc_cfg.num_supplicants = ARRAY_SIZE(smbb_bif);
chg->dc_psy = devm_power_supply_register(&pdev->dev,
&dc_psy_desc,
&dc_cfg);
if (IS_ERR(chg->dc_psy)) {
dev_err(&pdev->dev, "failed to register DC power supply\n");
return PTR_ERR(chg->dc_psy);
}
}
for (i = 0; i < ARRAY_SIZE(smbb_charger_irqs); ++i) {
int irq;
irq = platform_get_irq_byname(pdev, smbb_charger_irqs[i].name);
if (irq < 0)
return irq;
smbb_charger_irqs[i].handler(irq, chg);
rc = devm_request_threaded_irq(&pdev->dev, irq, NULL,
smbb_charger_irqs[i].handler, IRQF_ONESHOT,
smbb_charger_irqs[i].name, chg);
if (rc) {
dev_err(&pdev->dev, "failed to request irq '%s'\n",
smbb_charger_irqs[i].name);
return rc;
}
}
/*
* otg regulator is used to control VBUS voltage direction
* when USB switches between host and gadget mode
*/
chg->otg_rdesc.id = -1;
chg->otg_rdesc.name = "otg-vbus";
chg->otg_rdesc.ops = &smbb_chg_otg_ops;
chg->otg_rdesc.owner = THIS_MODULE;
chg->otg_rdesc.type = REGULATOR_VOLTAGE;
chg->otg_rdesc.supply_name = "usb-otg-in";
chg->otg_rdesc.of_match = "otg-vbus";
config.dev = &pdev->dev;
config.driver_data = chg;
chg->otg_reg = devm_regulator_register(&pdev->dev, &chg->otg_rdesc,
&config);
if (IS_ERR(chg->otg_reg))
return PTR_ERR(chg->otg_reg);
chg->jeita_ext_temp = of_property_read_bool(pdev->dev.of_node,
"qcom,jeita-extended-temp-range");
/* Set temperature range to [35%:70%] or [25%:80%] accordingly */
rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_BAT_BTC_CTRL,
BTC_CTRL_COLD_EXT | BTC_CTRL_HOT_EXT_N,
chg->jeita_ext_temp ?
BTC_CTRL_COLD_EXT :
BTC_CTRL_HOT_EXT_N);
if (rc) {
dev_err(&pdev->dev,
"unable to set %s temperature range\n",
chg->jeita_ext_temp ? "JEITA extended" : "normal");
return rc;
}
for (i = 0; i < ARRAY_SIZE(smbb_charger_setup); ++i) {
const struct reg_off_mask_default *r = &smbb_charger_setup[i];
if (r->rev_mask & BIT(chg->revision))
continue;
rc = regmap_update_bits(chg->regmap, chg->addr + r->offset,
r->mask, r->value);
if (rc) {
dev_err(&pdev->dev,
"unable to initializing charging, bailing\n");
return rc;
}
}
platform_set_drvdata(pdev, chg);
return 0;
}
static int smbb_charger_remove(struct platform_device *pdev)
{
struct smbb_charger *chg;
chg = platform_get_drvdata(pdev);
regmap_update_bits(chg->regmap, chg->addr + SMBB_CHG_CTRL, CTRL_EN, 0);
return 0;
}
static const struct of_device_id smbb_charger_id_table[] = {
{ .compatible = "qcom,pm8226-charger" },
{ .compatible = "qcom,pm8941-charger" },
{ }
};
MODULE_DEVICE_TABLE(of, smbb_charger_id_table);
static struct platform_driver smbb_charger_driver = {
.probe = smbb_charger_probe,
.remove = smbb_charger_remove,
.driver = {
.name = "qcom-smbb",
.of_match_table = smbb_charger_id_table,
},
};
module_platform_driver(smbb_charger_driver);
MODULE_DESCRIPTION("Qualcomm Switch-Mode Battery Charger and Boost driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/power/supply/qcom_smbb.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for SBS compliant Smart Battery System Managers
*
* The device communicates via i2c at address 0x0a and multiplexes access to up
* to four smart batteries at address 0x0b.
*
* Via sysfs interface the online state and charge type are presented.
*
* Datasheet SBSM: http://sbs-forum.org/specs/sbsm100b.pdf
* Datasheet LTC1760: http://cds.linear.com/docs/en/datasheet/1760fb.pdf
*
* Karl-Heinz Schneider <[email protected]>
*/
#include <linux/gpio/driver.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/i2c-mux.h>
#include <linux/power_supply.h>
#include <linux/property.h>
#define SBSM_MAX_BATS 4
#define SBSM_RETRY_CNT 3
/* registers addresses */
#define SBSM_CMD_BATSYSSTATE 0x01
#define SBSM_CMD_BATSYSSTATECONT 0x02
#define SBSM_CMD_BATSYSINFO 0x04
#define SBSM_CMD_LTC 0x3c
#define SBSM_MASK_BAT_SUPPORTED GENMASK(3, 0)
#define SBSM_MASK_CHARGE_BAT GENMASK(7, 4)
#define SBSM_BIT_AC_PRESENT BIT(0)
#define SBSM_BIT_TURBO BIT(7)
#define SBSM_SMB_BAT_OFFSET 11
struct sbsm_data {
struct i2c_client *client;
struct i2c_mux_core *muxc;
struct power_supply *psy;
u8 cur_chan; /* currently selected channel */
struct gpio_chip chip;
bool is_ltc1760; /* special capabilities */
unsigned int supported_bats;
unsigned int last_state;
unsigned int last_state_cont;
};
static enum power_supply_property sbsm_props[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CHARGE_TYPE,
};
static int sbsm_read_word(struct i2c_client *client, u8 address)
{
int reg, retries;
for (retries = SBSM_RETRY_CNT; retries > 0; retries--) {
reg = i2c_smbus_read_word_data(client, address);
if (reg >= 0)
break;
}
if (reg < 0) {
dev_err(&client->dev, "failed to read register 0x%02x\n",
address);
}
return reg;
}
static int sbsm_write_word(struct i2c_client *client, u8 address, u16 word)
{
int ret, retries;
for (retries = SBSM_RETRY_CNT; retries > 0; retries--) {
ret = i2c_smbus_write_word_data(client, address, word);
if (ret >= 0)
break;
}
if (ret < 0)
dev_err(&client->dev, "failed to write to register 0x%02x\n",
address);
return ret;
}
static int sbsm_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct sbsm_data *data = power_supply_get_drvdata(psy);
int regval = 0;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
regval = sbsm_read_word(data->client, SBSM_CMD_BATSYSSTATECONT);
if (regval < 0)
return regval;
val->intval = !!(regval & SBSM_BIT_AC_PRESENT);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
regval = sbsm_read_word(data->client, SBSM_CMD_BATSYSSTATE);
if (regval < 0)
return regval;
if ((regval & SBSM_MASK_CHARGE_BAT) == 0) {
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
return 0;
}
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
if (data->is_ltc1760) {
/* charge mode fast if turbo is active */
regval = sbsm_read_word(data->client, SBSM_CMD_LTC);
if (regval < 0)
return regval;
else if (regval & SBSM_BIT_TURBO)
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
}
break;
default:
return -EINVAL;
}
return 0;
}
static int sbsm_prop_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
struct sbsm_data *data = power_supply_get_drvdata(psy);
return (psp == POWER_SUPPLY_PROP_CHARGE_TYPE) && data->is_ltc1760;
}
static int sbsm_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct sbsm_data *data = power_supply_get_drvdata(psy);
int ret = -EINVAL;
u16 regval;
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_TYPE:
/* write 1 to TURBO if type fast is given */
if (!data->is_ltc1760)
break;
regval = val->intval ==
POWER_SUPPLY_CHARGE_TYPE_FAST ? SBSM_BIT_TURBO : 0;
ret = sbsm_write_word(data->client, SBSM_CMD_LTC, regval);
break;
default:
break;
}
return ret;
}
/*
* Switch to battery
* Parameter chan is directly the content of SMB_BAT* nibble
*/
static int sbsm_select(struct i2c_mux_core *muxc, u32 chan)
{
struct sbsm_data *data = i2c_mux_priv(muxc);
struct device *dev = &data->client->dev;
int ret = 0;
u16 reg;
if (data->cur_chan == chan)
return ret;
/* chan goes from 1 ... 4 */
reg = BIT(SBSM_SMB_BAT_OFFSET + chan);
ret = sbsm_write_word(data->client, SBSM_CMD_BATSYSSTATE, reg);
if (ret)
dev_err(dev, "Failed to select channel %i\n", chan);
else
data->cur_chan = chan;
return ret;
}
static int sbsm_gpio_get_value(struct gpio_chip *gc, unsigned int off)
{
struct sbsm_data *data = gpiochip_get_data(gc);
int ret;
ret = sbsm_read_word(data->client, SBSM_CMD_BATSYSSTATE);
if (ret < 0)
return ret;
return ret & BIT(off);
}
/*
* This needs to be defined or the GPIO lib fails to register the pin.
* But the 'gpio' is always an input.
*/
static int sbsm_gpio_direction_input(struct gpio_chip *gc, unsigned int off)
{
return 0;
}
static int sbsm_do_alert(struct device *dev, void *d)
{
struct i2c_client *client = i2c_verify_client(dev);
struct i2c_driver *driver;
if (!client || client->addr != 0x0b)
return 0;
device_lock(dev);
if (client->dev.driver) {
driver = to_i2c_driver(client->dev.driver);
if (driver->alert)
driver->alert(client, I2C_PROTOCOL_SMBUS_ALERT, 0);
else
dev_warn(&client->dev, "no driver alert()!\n");
} else {
dev_dbg(&client->dev, "alert with no driver\n");
}
device_unlock(dev);
return -EBUSY;
}
static void sbsm_alert(struct i2c_client *client, enum i2c_alert_protocol prot,
unsigned int d)
{
struct sbsm_data *sbsm = i2c_get_clientdata(client);
int ret, i, irq_bat = 0, state = 0;
ret = sbsm_read_word(sbsm->client, SBSM_CMD_BATSYSSTATE);
if (ret >= 0) {
irq_bat = ret ^ sbsm->last_state;
sbsm->last_state = ret;
state = ret;
}
ret = sbsm_read_word(sbsm->client, SBSM_CMD_BATSYSSTATECONT);
if ((ret >= 0) &&
((ret ^ sbsm->last_state_cont) & SBSM_BIT_AC_PRESENT)) {
irq_bat |= sbsm->supported_bats & state;
power_supply_changed(sbsm->psy);
}
sbsm->last_state_cont = ret;
for (i = 0; i < SBSM_MAX_BATS; i++) {
if (irq_bat & BIT(i)) {
device_for_each_child(&sbsm->muxc->adapter[i]->dev,
NULL, sbsm_do_alert);
}
}
}
static int sbsm_gpio_setup(struct sbsm_data *data)
{
struct gpio_chip *gc = &data->chip;
struct i2c_client *client = data->client;
struct device *dev = &client->dev;
int ret;
if (!device_property_present(dev, "gpio-controller"))
return 0;
ret = sbsm_read_word(client, SBSM_CMD_BATSYSSTATE);
if (ret < 0)
return ret;
data->last_state = ret;
ret = sbsm_read_word(client, SBSM_CMD_BATSYSSTATECONT);
if (ret < 0)
return ret;
data->last_state_cont = ret;
gc->get = sbsm_gpio_get_value;
gc->direction_input = sbsm_gpio_direction_input;
gc->can_sleep = true;
gc->base = -1;
gc->ngpio = SBSM_MAX_BATS;
gc->label = client->name;
gc->parent = dev;
gc->owner = THIS_MODULE;
ret = devm_gpiochip_add_data(dev, gc, data);
if (ret)
return dev_err_probe(dev, ret, "devm_gpiochip_add_data failed\n");
return ret;
}
static const struct power_supply_desc sbsm_default_psy_desc = {
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = sbsm_props,
.num_properties = ARRAY_SIZE(sbsm_props),
.get_property = &sbsm_get_property,
.set_property = &sbsm_set_property,
.property_is_writeable = &sbsm_prop_is_writeable,
};
static void sbsm_del_mux_adapter(void *data)
{
struct sbsm_data *sbsm = data;
i2c_mux_del_adapters(sbsm->muxc);
}
static int sbsm_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct i2c_adapter *adapter = client->adapter;
struct sbsm_data *data;
struct device *dev = &client->dev;
struct power_supply_desc *psy_desc;
struct power_supply_config psy_cfg = {};
int ret = 0, i;
/* Device listens only at address 0x0a */
if (client->addr != 0x0a)
return -EINVAL;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
return -EPFNOSUPPORT;
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(client, data);
data->client = client;
data->is_ltc1760 = !!strstr(id->name, "ltc1760");
ret = sbsm_read_word(client, SBSM_CMD_BATSYSINFO);
if (ret < 0)
return ret;
data->supported_bats = ret & SBSM_MASK_BAT_SUPPORTED;
data->muxc = i2c_mux_alloc(adapter, dev, SBSM_MAX_BATS, 0,
I2C_MUX_LOCKED, &sbsm_select, NULL);
if (!data->muxc)
return dev_err_probe(dev, -ENOMEM, "failed to alloc i2c mux\n");
data->muxc->priv = data;
ret = devm_add_action_or_reset(dev, sbsm_del_mux_adapter, data);
if (ret)
return ret;
/* register muxed i2c channels. One for each supported battery */
for (i = 0; i < SBSM_MAX_BATS; ++i) {
if (data->supported_bats & BIT(i)) {
ret = i2c_mux_add_adapter(data->muxc, 0, i + 1, 0);
if (ret)
break;
}
}
if (ret)
return dev_err_probe(dev, ret, "failed to register i2c mux channel %d\n", i + 1);
psy_desc = devm_kmemdup(dev, &sbsm_default_psy_desc, sizeof(*psy_desc), GFP_KERNEL);
if (!psy_desc)
return -ENOMEM;
psy_desc->name = devm_kasprintf(dev, GFP_KERNEL, "sbsm-%s", dev_name(&client->dev));
if (!psy_desc->name)
return -ENOMEM;
ret = sbsm_gpio_setup(data);
if (ret < 0)
return ret;
psy_cfg.drv_data = data;
psy_cfg.of_node = dev->of_node;
data->psy = devm_power_supply_register(dev, psy_desc, &psy_cfg);
if (IS_ERR(data->psy))
return dev_err_probe(dev, PTR_ERR(data->psy),
"failed to register power supply %s\n", psy_desc->name);
return 0;
}
static const struct i2c_device_id sbsm_ids[] = {
{ "sbs-manager", 0 },
{ "ltc1760", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, sbsm_ids);
#ifdef CONFIG_OF
static const struct of_device_id sbsm_dt_ids[] = {
{ .compatible = "sbs,sbs-manager" },
{ .compatible = "lltc,ltc1760" },
{ }
};
MODULE_DEVICE_TABLE(of, sbsm_dt_ids);
#endif
static struct i2c_driver sbsm_driver = {
.driver = {
.name = "sbsm",
.of_match_table = of_match_ptr(sbsm_dt_ids),
},
.probe = sbsm_probe,
.alert = sbsm_alert,
.id_table = sbsm_ids
};
module_i2c_driver(sbsm_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Karl-Heinz Schneider <[email protected]>");
MODULE_DESCRIPTION("SBSM Smart Battery System Manager");
| linux-master | drivers/power/supply/sbs-manager.c |
// SPDX-License-Identifier: GPL-2.0
// BQ25980 Battery Charger Driver
// Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/gpio/consumer.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/moduleparam.h>
#include <linux/slab.h>
#include "bq25980_charger.h"
struct bq25980_state {
bool dischg;
bool ovp;
bool ocp;
bool wdt;
bool tflt;
bool online;
bool ce;
bool hiz;
bool bypass;
u32 vbat_adc;
u32 vsys_adc;
u32 ibat_adc;
};
enum bq25980_id {
BQ25980,
BQ25975,
BQ25960,
};
struct bq25980_chip_info {
int model_id;
const struct regmap_config *regmap_config;
int busocp_def;
int busocp_sc_max;
int busocp_byp_max;
int busocp_sc_min;
int busocp_byp_min;
int busovp_sc_def;
int busovp_byp_def;
int busovp_sc_step;
int busovp_sc_offset;
int busovp_byp_step;
int busovp_byp_offset;
int busovp_sc_min;
int busovp_sc_max;
int busovp_byp_min;
int busovp_byp_max;
int batovp_def;
int batovp_max;
int batovp_min;
int batovp_step;
int batovp_offset;
int batocp_def;
int batocp_max;
};
struct bq25980_init_data {
u32 ichg;
u32 bypass_ilim;
u32 sc_ilim;
u32 vreg;
u32 iterm;
u32 iprechg;
u32 bypass_vlim;
u32 sc_vlim;
u32 ichg_max;
u32 vreg_max;
};
struct bq25980_device {
struct i2c_client *client;
struct device *dev;
struct power_supply *charger;
struct power_supply *battery;
struct mutex lock;
struct regmap *regmap;
char model_name[I2C_NAME_SIZE];
struct bq25980_init_data init_data;
const struct bq25980_chip_info *chip_info;
struct bq25980_state state;
int watchdog_timer;
};
static struct reg_default bq25980_reg_defs[] = {
{BQ25980_BATOVP, 0x5A},
{BQ25980_BATOVP_ALM, 0x46},
{BQ25980_BATOCP, 0x51},
{BQ25980_BATOCP_ALM, 0x50},
{BQ25980_BATUCP_ALM, 0x28},
{BQ25980_CHRGR_CTRL_1, 0x0},
{BQ25980_BUSOVP, 0x26},
{BQ25980_BUSOVP_ALM, 0x22},
{BQ25980_BUSOCP, 0xD},
{BQ25980_BUSOCP_ALM, 0xC},
{BQ25980_TEMP_CONTROL, 0x30},
{BQ25980_TDIE_ALM, 0xC8},
{BQ25980_TSBUS_FLT, 0x15},
{BQ25980_TSBAT_FLG, 0x15},
{BQ25980_VAC_CONTROL, 0x0},
{BQ25980_CHRGR_CTRL_2, 0x0},
{BQ25980_CHRGR_CTRL_3, 0x20},
{BQ25980_CHRGR_CTRL_4, 0x1D},
{BQ25980_CHRGR_CTRL_5, 0x18},
{BQ25980_STAT1, 0x0},
{BQ25980_STAT2, 0x0},
{BQ25980_STAT3, 0x0},
{BQ25980_STAT4, 0x0},
{BQ25980_STAT5, 0x0},
{BQ25980_FLAG1, 0x0},
{BQ25980_FLAG2, 0x0},
{BQ25980_FLAG3, 0x0},
{BQ25980_FLAG4, 0x0},
{BQ25980_FLAG5, 0x0},
{BQ25980_MASK1, 0x0},
{BQ25980_MASK2, 0x0},
{BQ25980_MASK3, 0x0},
{BQ25980_MASK4, 0x0},
{BQ25980_MASK5, 0x0},
{BQ25980_DEVICE_INFO, 0x8},
{BQ25980_ADC_CONTROL1, 0x0},
{BQ25980_ADC_CONTROL2, 0x0},
{BQ25980_IBUS_ADC_LSB, 0x0},
{BQ25980_IBUS_ADC_MSB, 0x0},
{BQ25980_VBUS_ADC_LSB, 0x0},
{BQ25980_VBUS_ADC_MSB, 0x0},
{BQ25980_VAC1_ADC_LSB, 0x0},
{BQ25980_VAC2_ADC_LSB, 0x0},
{BQ25980_VOUT_ADC_LSB, 0x0},
{BQ25980_VBAT_ADC_LSB, 0x0},
{BQ25980_IBAT_ADC_MSB, 0x0},
{BQ25980_IBAT_ADC_LSB, 0x0},
{BQ25980_TSBUS_ADC_LSB, 0x0},
{BQ25980_TSBAT_ADC_LSB, 0x0},
{BQ25980_TDIE_ADC_LSB, 0x0},
{BQ25980_DEGLITCH_TIME, 0x0},
{BQ25980_CHRGR_CTRL_6, 0x0},
};
static struct reg_default bq25975_reg_defs[] = {
{BQ25980_BATOVP, 0x5A},
{BQ25980_BATOVP_ALM, 0x46},
{BQ25980_BATOCP, 0x51},
{BQ25980_BATOCP_ALM, 0x50},
{BQ25980_BATUCP_ALM, 0x28},
{BQ25980_CHRGR_CTRL_1, 0x0},
{BQ25980_BUSOVP, 0x26},
{BQ25980_BUSOVP_ALM, 0x22},
{BQ25980_BUSOCP, 0xD},
{BQ25980_BUSOCP_ALM, 0xC},
{BQ25980_TEMP_CONTROL, 0x30},
{BQ25980_TDIE_ALM, 0xC8},
{BQ25980_TSBUS_FLT, 0x15},
{BQ25980_TSBAT_FLG, 0x15},
{BQ25980_VAC_CONTROL, 0x0},
{BQ25980_CHRGR_CTRL_2, 0x0},
{BQ25980_CHRGR_CTRL_3, 0x20},
{BQ25980_CHRGR_CTRL_4, 0x1D},
{BQ25980_CHRGR_CTRL_5, 0x18},
{BQ25980_STAT1, 0x0},
{BQ25980_STAT2, 0x0},
{BQ25980_STAT3, 0x0},
{BQ25980_STAT4, 0x0},
{BQ25980_STAT5, 0x0},
{BQ25980_FLAG1, 0x0},
{BQ25980_FLAG2, 0x0},
{BQ25980_FLAG3, 0x0},
{BQ25980_FLAG4, 0x0},
{BQ25980_FLAG5, 0x0},
{BQ25980_MASK1, 0x0},
{BQ25980_MASK2, 0x0},
{BQ25980_MASK3, 0x0},
{BQ25980_MASK4, 0x0},
{BQ25980_MASK5, 0x0},
{BQ25980_DEVICE_INFO, 0x8},
{BQ25980_ADC_CONTROL1, 0x0},
{BQ25980_ADC_CONTROL2, 0x0},
{BQ25980_IBUS_ADC_LSB, 0x0},
{BQ25980_IBUS_ADC_MSB, 0x0},
{BQ25980_VBUS_ADC_LSB, 0x0},
{BQ25980_VBUS_ADC_MSB, 0x0},
{BQ25980_VAC1_ADC_LSB, 0x0},
{BQ25980_VAC2_ADC_LSB, 0x0},
{BQ25980_VOUT_ADC_LSB, 0x0},
{BQ25980_VBAT_ADC_LSB, 0x0},
{BQ25980_IBAT_ADC_MSB, 0x0},
{BQ25980_IBAT_ADC_LSB, 0x0},
{BQ25980_TSBUS_ADC_LSB, 0x0},
{BQ25980_TSBAT_ADC_LSB, 0x0},
{BQ25980_TDIE_ADC_LSB, 0x0},
{BQ25980_DEGLITCH_TIME, 0x0},
{BQ25980_CHRGR_CTRL_6, 0x0},
};
static struct reg_default bq25960_reg_defs[] = {
{BQ25980_BATOVP, 0x5A},
{BQ25980_BATOVP_ALM, 0x46},
{BQ25980_BATOCP, 0x51},
{BQ25980_BATOCP_ALM, 0x50},
{BQ25980_BATUCP_ALM, 0x28},
{BQ25980_CHRGR_CTRL_1, 0x0},
{BQ25980_BUSOVP, 0x26},
{BQ25980_BUSOVP_ALM, 0x22},
{BQ25980_BUSOCP, 0xD},
{BQ25980_BUSOCP_ALM, 0xC},
{BQ25980_TEMP_CONTROL, 0x30},
{BQ25980_TDIE_ALM, 0xC8},
{BQ25980_TSBUS_FLT, 0x15},
{BQ25980_TSBAT_FLG, 0x15},
{BQ25980_VAC_CONTROL, 0x0},
{BQ25980_CHRGR_CTRL_2, 0x0},
{BQ25980_CHRGR_CTRL_3, 0x20},
{BQ25980_CHRGR_CTRL_4, 0x1D},
{BQ25980_CHRGR_CTRL_5, 0x18},
{BQ25980_STAT1, 0x0},
{BQ25980_STAT2, 0x0},
{BQ25980_STAT3, 0x0},
{BQ25980_STAT4, 0x0},
{BQ25980_STAT5, 0x0},
{BQ25980_FLAG1, 0x0},
{BQ25980_FLAG2, 0x0},
{BQ25980_FLAG3, 0x0},
{BQ25980_FLAG4, 0x0},
{BQ25980_FLAG5, 0x0},
{BQ25980_MASK1, 0x0},
{BQ25980_MASK2, 0x0},
{BQ25980_MASK3, 0x0},
{BQ25980_MASK4, 0x0},
{BQ25980_MASK5, 0x0},
{BQ25980_DEVICE_INFO, 0x8},
{BQ25980_ADC_CONTROL1, 0x0},
{BQ25980_ADC_CONTROL2, 0x0},
{BQ25980_IBUS_ADC_LSB, 0x0},
{BQ25980_IBUS_ADC_MSB, 0x0},
{BQ25980_VBUS_ADC_LSB, 0x0},
{BQ25980_VBUS_ADC_MSB, 0x0},
{BQ25980_VAC1_ADC_LSB, 0x0},
{BQ25980_VAC2_ADC_LSB, 0x0},
{BQ25980_VOUT_ADC_LSB, 0x0},
{BQ25980_VBAT_ADC_LSB, 0x0},
{BQ25980_IBAT_ADC_MSB, 0x0},
{BQ25980_IBAT_ADC_LSB, 0x0},
{BQ25980_TSBUS_ADC_LSB, 0x0},
{BQ25980_TSBAT_ADC_LSB, 0x0},
{BQ25980_TDIE_ADC_LSB, 0x0},
{BQ25980_DEGLITCH_TIME, 0x0},
{BQ25980_CHRGR_CTRL_6, 0x0},
};
static int bq25980_watchdog_time[BQ25980_NUM_WD_VAL] = {5000, 10000, 50000,
300000};
static int bq25980_get_input_curr_lim(struct bq25980_device *bq)
{
unsigned int busocp_reg_code;
int ret;
ret = regmap_read(bq->regmap, BQ25980_BUSOCP, &busocp_reg_code);
if (ret)
return ret;
return (busocp_reg_code * BQ25980_BUSOCP_STEP_uA) + BQ25980_BUSOCP_OFFSET_uA;
}
static int bq25980_set_hiz(struct bq25980_device *bq, int setting)
{
return regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
BQ25980_EN_HIZ, setting);
}
static int bq25980_set_input_curr_lim(struct bq25980_device *bq, int busocp)
{
unsigned int busocp_reg_code;
int ret;
if (!busocp)
return bq25980_set_hiz(bq, BQ25980_ENABLE_HIZ);
bq25980_set_hiz(bq, BQ25980_DISABLE_HIZ);
if (busocp < BQ25980_BUSOCP_MIN_uA)
busocp = BQ25980_BUSOCP_MIN_uA;
if (bq->state.bypass)
busocp = min(busocp, bq->chip_info->busocp_sc_max);
else
busocp = min(busocp, bq->chip_info->busocp_byp_max);
busocp_reg_code = (busocp - BQ25980_BUSOCP_OFFSET_uA)
/ BQ25980_BUSOCP_STEP_uA;
ret = regmap_write(bq->regmap, BQ25980_BUSOCP, busocp_reg_code);
if (ret)
return ret;
return regmap_write(bq->regmap, BQ25980_BUSOCP_ALM, busocp_reg_code);
}
static int bq25980_get_input_volt_lim(struct bq25980_device *bq)
{
unsigned int busovp_reg_code;
unsigned int busovp_offset;
unsigned int busovp_step;
int ret;
if (bq->state.bypass) {
busovp_step = bq->chip_info->busovp_byp_step;
busovp_offset = bq->chip_info->busovp_byp_offset;
} else {
busovp_step = bq->chip_info->busovp_sc_step;
busovp_offset = bq->chip_info->busovp_sc_offset;
}
ret = regmap_read(bq->regmap, BQ25980_BUSOVP, &busovp_reg_code);
if (ret)
return ret;
return (busovp_reg_code * busovp_step) + busovp_offset;
}
static int bq25980_set_input_volt_lim(struct bq25980_device *bq, int busovp)
{
unsigned int busovp_reg_code;
unsigned int busovp_step;
unsigned int busovp_offset;
int ret;
if (bq->state.bypass) {
busovp_step = bq->chip_info->busovp_byp_step;
busovp_offset = bq->chip_info->busovp_byp_offset;
if (busovp > bq->chip_info->busovp_byp_max)
busovp = bq->chip_info->busovp_byp_max;
else if (busovp < bq->chip_info->busovp_byp_min)
busovp = bq->chip_info->busovp_byp_min;
} else {
busovp_step = bq->chip_info->busovp_sc_step;
busovp_offset = bq->chip_info->busovp_sc_offset;
if (busovp > bq->chip_info->busovp_sc_max)
busovp = bq->chip_info->busovp_sc_max;
else if (busovp < bq->chip_info->busovp_sc_min)
busovp = bq->chip_info->busovp_sc_min;
}
busovp_reg_code = (busovp - busovp_offset) / busovp_step;
ret = regmap_write(bq->regmap, BQ25980_BUSOVP, busovp_reg_code);
if (ret)
return ret;
return regmap_write(bq->regmap, BQ25980_BUSOVP_ALM, busovp_reg_code);
}
static int bq25980_get_const_charge_curr(struct bq25980_device *bq)
{
unsigned int batocp_reg_code;
int ret;
ret = regmap_read(bq->regmap, BQ25980_BATOCP, &batocp_reg_code);
if (ret)
return ret;
return (batocp_reg_code & BQ25980_BATOCP_MASK) *
BQ25980_BATOCP_STEP_uA;
}
static int bq25980_set_const_charge_curr(struct bq25980_device *bq, int batocp)
{
unsigned int batocp_reg_code;
int ret;
batocp = max(batocp, BQ25980_BATOCP_MIN_uA);
batocp = min(batocp, bq->chip_info->batocp_max);
batocp_reg_code = batocp / BQ25980_BATOCP_STEP_uA;
ret = regmap_update_bits(bq->regmap, BQ25980_BATOCP,
BQ25980_BATOCP_MASK, batocp_reg_code);
if (ret)
return ret;
return regmap_update_bits(bq->regmap, BQ25980_BATOCP_ALM,
BQ25980_BATOCP_MASK, batocp_reg_code);
}
static int bq25980_get_const_charge_volt(struct bq25980_device *bq)
{
unsigned int batovp_reg_code;
int ret;
ret = regmap_read(bq->regmap, BQ25980_BATOVP, &batovp_reg_code);
if (ret)
return ret;
return ((batovp_reg_code * bq->chip_info->batovp_step) +
bq->chip_info->batovp_offset);
}
static int bq25980_set_const_charge_volt(struct bq25980_device *bq, int batovp)
{
unsigned int batovp_reg_code;
int ret;
if (batovp < bq->chip_info->batovp_min)
batovp = bq->chip_info->batovp_min;
if (batovp > bq->chip_info->batovp_max)
batovp = bq->chip_info->batovp_max;
batovp_reg_code = (batovp - bq->chip_info->batovp_offset) /
bq->chip_info->batovp_step;
ret = regmap_write(bq->regmap, BQ25980_BATOVP, batovp_reg_code);
if (ret)
return ret;
return regmap_write(bq->regmap, BQ25980_BATOVP_ALM, batovp_reg_code);
}
static int bq25980_set_bypass(struct bq25980_device *bq, bool en_bypass)
{
int ret;
if (en_bypass)
ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
BQ25980_EN_BYPASS, BQ25980_EN_BYPASS);
else
ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
BQ25980_EN_BYPASS, en_bypass);
if (ret)
return ret;
bq->state.bypass = en_bypass;
return bq->state.bypass;
}
static int bq25980_set_chg_en(struct bq25980_device *bq, bool en_chg)
{
int ret;
if (en_chg)
ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
BQ25980_CHG_EN, BQ25980_CHG_EN);
else
ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
BQ25980_CHG_EN, en_chg);
if (ret)
return ret;
bq->state.ce = en_chg;
return 0;
}
static int bq25980_get_adc_ibus(struct bq25980_device *bq)
{
int ibus_adc_lsb, ibus_adc_msb;
u16 ibus_adc;
int ret;
ret = regmap_read(bq->regmap, BQ25980_IBUS_ADC_MSB, &ibus_adc_msb);
if (ret)
return ret;
ret = regmap_read(bq->regmap, BQ25980_IBUS_ADC_LSB, &ibus_adc_lsb);
if (ret)
return ret;
ibus_adc = (ibus_adc_msb << 8) | ibus_adc_lsb;
if (ibus_adc_msb & BQ25980_ADC_POLARITY_BIT)
return ((ibus_adc ^ 0xffff) + 1) * BQ25980_ADC_CURR_STEP_uA;
return ibus_adc * BQ25980_ADC_CURR_STEP_uA;
}
static int bq25980_get_adc_vbus(struct bq25980_device *bq)
{
int vbus_adc_lsb, vbus_adc_msb;
u16 vbus_adc;
int ret;
ret = regmap_read(bq->regmap, BQ25980_VBUS_ADC_MSB, &vbus_adc_msb);
if (ret)
return ret;
ret = regmap_read(bq->regmap, BQ25980_VBUS_ADC_LSB, &vbus_adc_lsb);
if (ret)
return ret;
vbus_adc = (vbus_adc_msb << 8) | vbus_adc_lsb;
return vbus_adc * BQ25980_ADC_VOLT_STEP_uV;
}
static int bq25980_get_ibat_adc(struct bq25980_device *bq)
{
int ret;
int ibat_adc_lsb, ibat_adc_msb;
int ibat_adc;
ret = regmap_read(bq->regmap, BQ25980_IBAT_ADC_MSB, &ibat_adc_msb);
if (ret)
return ret;
ret = regmap_read(bq->regmap, BQ25980_IBAT_ADC_LSB, &ibat_adc_lsb);
if (ret)
return ret;
ibat_adc = (ibat_adc_msb << 8) | ibat_adc_lsb;
if (ibat_adc_msb & BQ25980_ADC_POLARITY_BIT)
return ((ibat_adc ^ 0xffff) + 1) * BQ25980_ADC_CURR_STEP_uA;
return ibat_adc * BQ25980_ADC_CURR_STEP_uA;
}
static int bq25980_get_adc_vbat(struct bq25980_device *bq)
{
int vsys_adc_lsb, vsys_adc_msb;
u16 vsys_adc;
int ret;
ret = regmap_read(bq->regmap, BQ25980_VBAT_ADC_MSB, &vsys_adc_msb);
if (ret)
return ret;
ret = regmap_read(bq->regmap, BQ25980_VBAT_ADC_LSB, &vsys_adc_lsb);
if (ret)
return ret;
vsys_adc = (vsys_adc_msb << 8) | vsys_adc_lsb;
return vsys_adc * BQ25980_ADC_VOLT_STEP_uV;
}
static int bq25980_get_state(struct bq25980_device *bq,
struct bq25980_state *state)
{
unsigned int chg_ctrl_2;
unsigned int stat1;
unsigned int stat2;
unsigned int stat3;
unsigned int stat4;
unsigned int ibat_adc_msb;
int ret;
ret = regmap_read(bq->regmap, BQ25980_STAT1, &stat1);
if (ret)
return ret;
ret = regmap_read(bq->regmap, BQ25980_STAT2, &stat2);
if (ret)
return ret;
ret = regmap_read(bq->regmap, BQ25980_STAT3, &stat3);
if (ret)
return ret;
ret = regmap_read(bq->regmap, BQ25980_STAT4, &stat4);
if (ret)
return ret;
ret = regmap_read(bq->regmap, BQ25980_CHRGR_CTRL_2, &chg_ctrl_2);
if (ret)
return ret;
ret = regmap_read(bq->regmap, BQ25980_IBAT_ADC_MSB, &ibat_adc_msb);
if (ret)
return ret;
state->dischg = ibat_adc_msb & BQ25980_ADC_POLARITY_BIT;
state->ovp = (stat1 & BQ25980_STAT1_OVP_MASK) |
(stat3 & BQ25980_STAT3_OVP_MASK);
state->ocp = (stat1 & BQ25980_STAT1_OCP_MASK) |
(stat2 & BQ25980_STAT2_OCP_MASK);
state->tflt = stat4 & BQ25980_STAT4_TFLT_MASK;
state->wdt = stat4 & BQ25980_WD_STAT;
state->online = stat3 & BQ25980_PRESENT_MASK;
state->ce = chg_ctrl_2 & BQ25980_CHG_EN;
state->hiz = chg_ctrl_2 & BQ25980_EN_HIZ;
state->bypass = chg_ctrl_2 & BQ25980_EN_BYPASS;
return 0;
}
static int bq25980_get_battery_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct bq25980_device *bq = power_supply_get_drvdata(psy);
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
val->intval = bq->init_data.ichg_max;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
val->intval = bq->init_data.vreg_max;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = bq25980_get_ibat_adc(bq);
val->intval = ret;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = bq25980_get_adc_vbat(bq);
if (ret < 0)
return ret;
val->intval = ret;
break;
default:
return -EINVAL;
}
return ret;
}
static int bq25980_set_charger_property(struct power_supply *psy,
enum power_supply_property prop,
const union power_supply_propval *val)
{
struct bq25980_device *bq = power_supply_get_drvdata(psy);
int ret = -EINVAL;
switch (prop) {
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = bq25980_set_input_curr_lim(bq, val->intval);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
ret = bq25980_set_input_volt_lim(bq, val->intval);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
ret = bq25980_set_bypass(bq, val->intval);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_STATUS:
ret = bq25980_set_chg_en(bq, val->intval);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = bq25980_set_const_charge_curr(bq, val->intval);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = bq25980_set_const_charge_volt(bq, val->intval);
if (ret)
return ret;
break;
default:
return -EINVAL;
}
return ret;
}
static int bq25980_get_charger_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct bq25980_device *bq = power_supply_get_drvdata(psy);
struct bq25980_state state;
int ret = 0;
mutex_lock(&bq->lock);
ret = bq25980_get_state(bq, &state);
mutex_unlock(&bq->lock);
if (ret)
return ret;
switch (psp) {
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = BQ25980_MANUFACTURER;
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = bq->model_name;
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = state.online;
break;
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
ret = bq25980_get_input_volt_lim(bq);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = bq25980_get_input_curr_lim(bq);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_HEALTH:
val->intval = POWER_SUPPLY_HEALTH_GOOD;
if (state.tflt)
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
else if (state.ovp)
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
else if (state.ocp)
val->intval = POWER_SUPPLY_HEALTH_OVERCURRENT;
else if (state.wdt)
val->intval =
POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE;
break;
case POWER_SUPPLY_PROP_STATUS:
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
if ((state.ce) && (!state.hiz))
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else if (state.dischg)
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
else if (!state.ce)
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
if (!state.ce)
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
else if (state.bypass)
val->intval = POWER_SUPPLY_CHARGE_TYPE_BYPASS;
else if (!state.bypass)
val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = bq25980_get_adc_ibus(bq);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = bq25980_get_adc_vbus(bq);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = bq25980_get_const_charge_curr(bq);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = bq25980_get_const_charge_volt(bq);
if (ret < 0)
return ret;
val->intval = ret;
break;
default:
return -EINVAL;
}
return ret;
}
static bool bq25980_state_changed(struct bq25980_device *bq,
struct bq25980_state *new_state)
{
struct bq25980_state old_state;
mutex_lock(&bq->lock);
old_state = bq->state;
mutex_unlock(&bq->lock);
return (old_state.dischg != new_state->dischg ||
old_state.ovp != new_state->ovp ||
old_state.ocp != new_state->ocp ||
old_state.online != new_state->online ||
old_state.wdt != new_state->wdt ||
old_state.tflt != new_state->tflt ||
old_state.ce != new_state->ce ||
old_state.hiz != new_state->hiz ||
old_state.bypass != new_state->bypass);
}
static irqreturn_t bq25980_irq_handler_thread(int irq, void *private)
{
struct bq25980_device *bq = private;
struct bq25980_state state;
int ret;
ret = bq25980_get_state(bq, &state);
if (ret < 0)
goto irq_out;
if (!bq25980_state_changed(bq, &state))
goto irq_out;
mutex_lock(&bq->lock);
bq->state = state;
mutex_unlock(&bq->lock);
power_supply_changed(bq->charger);
irq_out:
return IRQ_HANDLED;
}
static enum power_supply_property bq25980_power_supply_props[] = {
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
};
static enum power_supply_property bq25980_battery_props[] = {
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
};
static char *bq25980_charger_supplied_to[] = {
"main-battery",
};
static int bq25980_property_is_writeable(struct power_supply *psy,
enum power_supply_property prop)
{
switch (prop) {
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
case POWER_SUPPLY_PROP_CHARGE_TYPE:
case POWER_SUPPLY_PROP_STATUS:
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
return true;
default:
return false;
}
}
static const struct power_supply_desc bq25980_power_supply_desc = {
.name = "bq25980-charger",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = bq25980_power_supply_props,
.num_properties = ARRAY_SIZE(bq25980_power_supply_props),
.get_property = bq25980_get_charger_property,
.set_property = bq25980_set_charger_property,
.property_is_writeable = bq25980_property_is_writeable,
};
static struct power_supply_desc bq25980_battery_desc = {
.name = "bq25980-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.get_property = bq25980_get_battery_property,
.properties = bq25980_battery_props,
.num_properties = ARRAY_SIZE(bq25980_battery_props),
.property_is_writeable = bq25980_property_is_writeable,
};
static bool bq25980_is_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case BQ25980_CHRGR_CTRL_2:
case BQ25980_STAT1...BQ25980_FLAG5:
case BQ25980_ADC_CONTROL1...BQ25980_TDIE_ADC_LSB:
return true;
default:
return false;
}
}
static const struct regmap_config bq25980_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = BQ25980_CHRGR_CTRL_6,
.reg_defaults = bq25980_reg_defs,
.num_reg_defaults = ARRAY_SIZE(bq25980_reg_defs),
.cache_type = REGCACHE_RBTREE,
.volatile_reg = bq25980_is_volatile_reg,
};
static const struct regmap_config bq25975_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = BQ25980_CHRGR_CTRL_6,
.reg_defaults = bq25975_reg_defs,
.num_reg_defaults = ARRAY_SIZE(bq25975_reg_defs),
.cache_type = REGCACHE_RBTREE,
.volatile_reg = bq25980_is_volatile_reg,
};
static const struct regmap_config bq25960_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = BQ25980_CHRGR_CTRL_6,
.reg_defaults = bq25960_reg_defs,
.num_reg_defaults = ARRAY_SIZE(bq25960_reg_defs),
.cache_type = REGCACHE_RBTREE,
.volatile_reg = bq25980_is_volatile_reg,
};
static const struct bq25980_chip_info bq25980_chip_info_tbl[] = {
[BQ25980] = {
.model_id = BQ25980,
.regmap_config = &bq25980_regmap_config,
.busocp_def = BQ25980_BUSOCP_DFLT_uA,
.busocp_sc_min = BQ25960_BUSOCP_SC_MAX_uA,
.busocp_sc_max = BQ25980_BUSOCP_SC_MAX_uA,
.busocp_byp_max = BQ25980_BUSOCP_BYP_MAX_uA,
.busocp_byp_min = BQ25980_BUSOCP_MIN_uA,
.busovp_sc_def = BQ25980_BUSOVP_DFLT_uV,
.busovp_byp_def = BQ25980_BUSOVP_BYPASS_DFLT_uV,
.busovp_sc_step = BQ25980_BUSOVP_SC_STEP_uV,
.busovp_sc_offset = BQ25980_BUSOVP_SC_OFFSET_uV,
.busovp_byp_step = BQ25980_BUSOVP_BYP_STEP_uV,
.busovp_byp_offset = BQ25980_BUSOVP_BYP_OFFSET_uV,
.busovp_sc_min = BQ25980_BUSOVP_SC_MIN_uV,
.busovp_sc_max = BQ25980_BUSOVP_SC_MAX_uV,
.busovp_byp_min = BQ25980_BUSOVP_BYP_MIN_uV,
.busovp_byp_max = BQ25980_BUSOVP_BYP_MAX_uV,
.batovp_def = BQ25980_BATOVP_DFLT_uV,
.batovp_max = BQ25980_BATOVP_MAX_uV,
.batovp_min = BQ25980_BATOVP_MIN_uV,
.batovp_step = BQ25980_BATOVP_STEP_uV,
.batovp_offset = BQ25980_BATOVP_OFFSET_uV,
.batocp_def = BQ25980_BATOCP_DFLT_uA,
.batocp_max = BQ25980_BATOCP_MAX_uA,
},
[BQ25975] = {
.model_id = BQ25975,
.regmap_config = &bq25975_regmap_config,
.busocp_def = BQ25975_BUSOCP_DFLT_uA,
.busocp_sc_min = BQ25975_BUSOCP_SC_MAX_uA,
.busocp_sc_max = BQ25975_BUSOCP_SC_MAX_uA,
.busocp_byp_min = BQ25980_BUSOCP_MIN_uA,
.busocp_byp_max = BQ25975_BUSOCP_BYP_MAX_uA,
.busovp_sc_def = BQ25975_BUSOVP_DFLT_uV,
.busovp_byp_def = BQ25975_BUSOVP_BYPASS_DFLT_uV,
.busovp_sc_step = BQ25975_BUSOVP_SC_STEP_uV,
.busovp_sc_offset = BQ25975_BUSOVP_SC_OFFSET_uV,
.busovp_byp_step = BQ25975_BUSOVP_BYP_STEP_uV,
.busovp_byp_offset = BQ25975_BUSOVP_BYP_OFFSET_uV,
.busovp_sc_min = BQ25975_BUSOVP_SC_MIN_uV,
.busovp_sc_max = BQ25975_BUSOVP_SC_MAX_uV,
.busovp_byp_min = BQ25975_BUSOVP_BYP_MIN_uV,
.busovp_byp_max = BQ25975_BUSOVP_BYP_MAX_uV,
.batovp_def = BQ25975_BATOVP_DFLT_uV,
.batovp_max = BQ25975_BATOVP_MAX_uV,
.batovp_min = BQ25975_BATOVP_MIN_uV,
.batovp_step = BQ25975_BATOVP_STEP_uV,
.batovp_offset = BQ25975_BATOVP_OFFSET_uV,
.batocp_def = BQ25980_BATOCP_DFLT_uA,
.batocp_max = BQ25980_BATOCP_MAX_uA,
},
[BQ25960] = {
.model_id = BQ25960,
.regmap_config = &bq25960_regmap_config,
.busocp_def = BQ25960_BUSOCP_DFLT_uA,
.busocp_sc_min = BQ25960_BUSOCP_SC_MAX_uA,
.busocp_sc_max = BQ25960_BUSOCP_SC_MAX_uA,
.busocp_byp_min = BQ25960_BUSOCP_SC_MAX_uA,
.busocp_byp_max = BQ25960_BUSOCP_BYP_MAX_uA,
.busovp_sc_def = BQ25975_BUSOVP_DFLT_uV,
.busovp_byp_def = BQ25975_BUSOVP_BYPASS_DFLT_uV,
.busovp_sc_step = BQ25960_BUSOVP_SC_STEP_uV,
.busovp_sc_offset = BQ25960_BUSOVP_SC_OFFSET_uV,
.busovp_byp_step = BQ25960_BUSOVP_BYP_STEP_uV,
.busovp_byp_offset = BQ25960_BUSOVP_BYP_OFFSET_uV,
.busovp_sc_min = BQ25960_BUSOVP_SC_MIN_uV,
.busovp_sc_max = BQ25960_BUSOVP_SC_MAX_uV,
.busovp_byp_min = BQ25960_BUSOVP_BYP_MIN_uV,
.busovp_byp_max = BQ25960_BUSOVP_BYP_MAX_uV,
.batovp_def = BQ25960_BATOVP_DFLT_uV,
.batovp_max = BQ25960_BATOVP_MAX_uV,
.batovp_min = BQ25960_BATOVP_MIN_uV,
.batovp_step = BQ25960_BATOVP_STEP_uV,
.batovp_offset = BQ25960_BATOVP_OFFSET_uV,
.batocp_def = BQ25960_BATOCP_DFLT_uA,
.batocp_max = BQ25960_BATOCP_MAX_uA,
},
};
static int bq25980_power_supply_init(struct bq25980_device *bq,
struct device *dev)
{
struct power_supply_config psy_cfg = { .drv_data = bq,
.of_node = dev->of_node, };
psy_cfg.supplied_to = bq25980_charger_supplied_to;
psy_cfg.num_supplicants = ARRAY_SIZE(bq25980_charger_supplied_to);
bq->charger = devm_power_supply_register(bq->dev,
&bq25980_power_supply_desc,
&psy_cfg);
if (IS_ERR(bq->charger))
return -EINVAL;
bq->battery = devm_power_supply_register(bq->dev,
&bq25980_battery_desc,
&psy_cfg);
if (IS_ERR(bq->battery))
return -EINVAL;
return 0;
}
static int bq25980_hw_init(struct bq25980_device *bq)
{
struct power_supply_battery_info *bat_info;
int wd_reg_val = BQ25980_WATCHDOG_DIS;
int wd_max_val = BQ25980_NUM_WD_VAL - 1;
int ret = 0;
int curr_val;
int volt_val;
int i;
if (bq->watchdog_timer) {
if (bq->watchdog_timer >= bq25980_watchdog_time[wd_max_val])
wd_reg_val = wd_max_val;
else {
for (i = 0; i < wd_max_val; i++) {
if (bq->watchdog_timer > bq25980_watchdog_time[i] &&
bq->watchdog_timer < bq25980_watchdog_time[i + 1]) {
wd_reg_val = i;
break;
}
}
}
}
ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_3,
BQ25980_WATCHDOG_MASK, wd_reg_val);
if (ret)
return ret;
ret = power_supply_get_battery_info(bq->charger, &bat_info);
if (ret) {
dev_warn(bq->dev, "battery info missing\n");
return -EINVAL;
}
bq->init_data.ichg_max = bat_info->constant_charge_current_max_ua;
bq->init_data.vreg_max = bat_info->constant_charge_voltage_max_uv;
if (bq->state.bypass) {
ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
BQ25980_EN_BYPASS, BQ25980_EN_BYPASS);
if (ret)
return ret;
curr_val = bq->init_data.bypass_ilim;
volt_val = bq->init_data.bypass_vlim;
} else {
curr_val = bq->init_data.sc_ilim;
volt_val = bq->init_data.sc_vlim;
}
ret = bq25980_set_input_curr_lim(bq, curr_val);
if (ret)
return ret;
ret = bq25980_set_input_volt_lim(bq, volt_val);
if (ret)
return ret;
return regmap_update_bits(bq->regmap, BQ25980_ADC_CONTROL1,
BQ25980_ADC_EN, BQ25980_ADC_EN);
}
static int bq25980_parse_dt(struct bq25980_device *bq)
{
int ret;
ret = device_property_read_u32(bq->dev, "ti,watchdog-timeout-ms",
&bq->watchdog_timer);
if (ret)
bq->watchdog_timer = BQ25980_WATCHDOG_MIN;
if (bq->watchdog_timer > BQ25980_WATCHDOG_MAX ||
bq->watchdog_timer < BQ25980_WATCHDOG_MIN)
return -EINVAL;
ret = device_property_read_u32(bq->dev,
"ti,sc-ovp-limit-microvolt",
&bq->init_data.sc_vlim);
if (ret)
bq->init_data.sc_vlim = bq->chip_info->busovp_sc_def;
if (bq->init_data.sc_vlim > bq->chip_info->busovp_sc_max ||
bq->init_data.sc_vlim < bq->chip_info->busovp_sc_min) {
dev_err(bq->dev, "SC ovp limit is out of range\n");
return -EINVAL;
}
ret = device_property_read_u32(bq->dev,
"ti,sc-ocp-limit-microamp",
&bq->init_data.sc_ilim);
if (ret)
bq->init_data.sc_ilim = bq->chip_info->busocp_def;
if (bq->init_data.sc_ilim > bq->chip_info->busocp_sc_max ||
bq->init_data.sc_ilim < bq->chip_info->busocp_sc_min) {
dev_err(bq->dev, "SC ocp limit is out of range\n");
return -EINVAL;
}
ret = device_property_read_u32(bq->dev,
"ti,bypass-ovp-limit-microvolt",
&bq->init_data.bypass_vlim);
if (ret)
bq->init_data.bypass_vlim = bq->chip_info->busovp_byp_def;
if (bq->init_data.bypass_vlim > bq->chip_info->busovp_byp_max ||
bq->init_data.bypass_vlim < bq->chip_info->busovp_byp_min) {
dev_err(bq->dev, "Bypass ovp limit is out of range\n");
return -EINVAL;
}
ret = device_property_read_u32(bq->dev,
"ti,bypass-ocp-limit-microamp",
&bq->init_data.bypass_ilim);
if (ret)
bq->init_data.bypass_ilim = bq->chip_info->busocp_def;
if (bq->init_data.bypass_ilim > bq->chip_info->busocp_byp_max ||
bq->init_data.bypass_ilim < bq->chip_info->busocp_byp_min) {
dev_err(bq->dev, "Bypass ocp limit is out of range\n");
return -EINVAL;
}
bq->state.bypass = device_property_read_bool(bq->dev,
"ti,bypass-enable");
return 0;
}
static int bq25980_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct device *dev = &client->dev;
struct bq25980_device *bq;
int ret;
bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
if (!bq)
return -ENOMEM;
bq->client = client;
bq->dev = dev;
mutex_init(&bq->lock);
strncpy(bq->model_name, id->name, I2C_NAME_SIZE);
bq->chip_info = &bq25980_chip_info_tbl[id->driver_data];
bq->regmap = devm_regmap_init_i2c(client,
bq->chip_info->regmap_config);
if (IS_ERR(bq->regmap)) {
dev_err(dev, "Failed to allocate register map\n");
return PTR_ERR(bq->regmap);
}
i2c_set_clientdata(client, bq);
ret = bq25980_parse_dt(bq);
if (ret) {
dev_err(dev, "Failed to read device tree properties%d\n", ret);
return ret;
}
if (client->irq) {
ret = devm_request_threaded_irq(dev, client->irq, NULL,
bq25980_irq_handler_thread,
IRQF_TRIGGER_FALLING |
IRQF_ONESHOT,
dev_name(&client->dev), bq);
if (ret)
return ret;
}
ret = bq25980_power_supply_init(bq, dev);
if (ret) {
dev_err(dev, "Failed to register power supply\n");
return ret;
}
ret = bq25980_hw_init(bq);
if (ret) {
dev_err(dev, "Cannot initialize the chip.\n");
return ret;
}
return 0;
}
static const struct i2c_device_id bq25980_i2c_ids[] = {
{ "bq25980", BQ25980 },
{ "bq25975", BQ25975 },
{ "bq25960", BQ25960 },
{},
};
MODULE_DEVICE_TABLE(i2c, bq25980_i2c_ids);
static const struct of_device_id bq25980_of_match[] = {
{ .compatible = "ti,bq25980", .data = (void *)BQ25980 },
{ .compatible = "ti,bq25975", .data = (void *)BQ25975 },
{ .compatible = "ti,bq25960", .data = (void *)BQ25960 },
{ },
};
MODULE_DEVICE_TABLE(of, bq25980_of_match);
static struct i2c_driver bq25980_driver = {
.driver = {
.name = "bq25980-charger",
.of_match_table = bq25980_of_match,
},
.probe = bq25980_probe,
.id_table = bq25980_i2c_ids,
};
module_i2c_driver(bq25980_driver);
MODULE_AUTHOR("Dan Murphy <[email protected]>");
MODULE_AUTHOR("Ricardo Rivera-Matos <[email protected]>");
MODULE_DESCRIPTION("bq25980 charger driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/power/supply/bq25980_charger.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2016-2019 The Linux Foundation. All rights reserved.
* Copyright (c) 2023, Linaro Ltd.
* Author: Caleb Connolly <[email protected]>
*
* This driver is for the switch-mode battery charger and boost
* hardware found in pmi8998 and related PMICs.
*/
#include <linux/bits.h>
#include <linux/devm-helpers.h>
#include <linux/iio/consumer.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/minmax.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_wakeirq.h>
#include <linux/of.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/types.h>
#include <linux/workqueue.h>
/* clang-format off */
#define BATTERY_CHARGER_STATUS_1 0x06
#define BVR_INITIAL_RAMP_BIT BIT(7)
#define CC_SOFT_TERMINATE_BIT BIT(6)
#define STEP_CHARGING_STATUS_SHIFT 3
#define STEP_CHARGING_STATUS_MASK GENMASK(5, 3)
#define BATTERY_CHARGER_STATUS_MASK GENMASK(2, 0)
#define BATTERY_CHARGER_STATUS_2 0x07
#define INPUT_CURRENT_LIMITED_BIT BIT(7)
#define CHARGER_ERROR_STATUS_SFT_EXPIRE_BIT BIT(6)
#define CHARGER_ERROR_STATUS_BAT_OV_BIT BIT(5)
#define CHARGER_ERROR_STATUS_BAT_TERM_MISSING_BIT BIT(4)
#define BAT_TEMP_STATUS_MASK GENMASK(3, 0)
#define BAT_TEMP_STATUS_SOFT_LIMIT_MASK GENMASK(3, 2)
#define BAT_TEMP_STATUS_HOT_SOFT_LIMIT_BIT BIT(3)
#define BAT_TEMP_STATUS_COLD_SOFT_LIMIT_BIT BIT(2)
#define BAT_TEMP_STATUS_TOO_HOT_BIT BIT(1)
#define BAT_TEMP_STATUS_TOO_COLD_BIT BIT(0)
#define BATTERY_CHARGER_STATUS_4 0x0A
#define CHARGE_CURRENT_POST_JEITA_MASK GENMASK(7, 0)
#define BATTERY_CHARGER_STATUS_7 0x0D
#define ENABLE_TRICKLE_BIT BIT(7)
#define ENABLE_PRE_CHARGING_BIT BIT(6)
#define ENABLE_FAST_CHARGING_BIT BIT(5)
#define ENABLE_FULLON_MODE_BIT BIT(4)
#define TOO_COLD_ADC_BIT BIT(3)
#define TOO_HOT_ADC_BIT BIT(2)
#define HOT_SL_ADC_BIT BIT(1)
#define COLD_SL_ADC_BIT BIT(0)
#define CHARGING_ENABLE_CMD 0x42
#define CHARGING_ENABLE_CMD_BIT BIT(0)
#define CHGR_CFG2 0x51
#define CHG_EN_SRC_BIT BIT(7)
#define CHG_EN_POLARITY_BIT BIT(6)
#define PRETOFAST_TRANSITION_CFG_BIT BIT(5)
#define BAT_OV_ECC_BIT BIT(4)
#define I_TERM_BIT BIT(3)
#define AUTO_RECHG_BIT BIT(2)
#define EN_ANALOG_DROP_IN_VBATT_BIT BIT(1)
#define CHARGER_INHIBIT_BIT BIT(0)
#define PRE_CHARGE_CURRENT_CFG 0x60
#define PRE_CHARGE_CURRENT_SETTING_MASK GENMASK(5, 0)
#define FAST_CHARGE_CURRENT_CFG 0x61
#define FAST_CHARGE_CURRENT_SETTING_MASK GENMASK(7, 0)
#define FLOAT_VOLTAGE_CFG 0x70
#define FLOAT_VOLTAGE_SETTING_MASK GENMASK(7, 0)
#define FG_UPDATE_CFG_2_SEL 0x7D
#define SOC_LT_OTG_THRESH_SEL_BIT BIT(3)
#define SOC_LT_CHG_RECHARGE_THRESH_SEL_BIT BIT(2)
#define VBT_LT_CHG_RECHARGE_THRESH_SEL_BIT BIT(1)
#define IBT_LT_CHG_TERM_THRESH_SEL_BIT BIT(0)
#define JEITA_EN_CFG 0x90
#define JEITA_EN_HARDLIMIT_BIT BIT(4)
#define JEITA_EN_HOT_SL_FCV_BIT BIT(3)
#define JEITA_EN_COLD_SL_FCV_BIT BIT(2)
#define JEITA_EN_HOT_SL_CCC_BIT BIT(1)
#define JEITA_EN_COLD_SL_CCC_BIT BIT(0)
#define INT_RT_STS 0x310
#define TYPE_C_CHANGE_RT_STS_BIT BIT(7)
#define USBIN_ICL_CHANGE_RT_STS_BIT BIT(6)
#define USBIN_SOURCE_CHANGE_RT_STS_BIT BIT(5)
#define USBIN_PLUGIN_RT_STS_BIT BIT(4)
#define USBIN_OV_RT_STS_BIT BIT(3)
#define USBIN_UV_RT_STS_BIT BIT(2)
#define USBIN_LT_3P6V_RT_STS_BIT BIT(1)
#define USBIN_COLLAPSE_RT_STS_BIT BIT(0)
#define OTG_CFG 0x153
#define OTG_RESERVED_MASK GENMASK(7, 6)
#define DIS_OTG_ON_TLIM_BIT BIT(5)
#define QUICKSTART_OTG_FASTROLESWAP_BIT BIT(4)
#define INCREASE_DFP_TIME_BIT BIT(3)
#define ENABLE_OTG_IN_DEBUG_MODE_BIT BIT(2)
#define OTG_EN_SRC_CFG_BIT BIT(1)
#define CONCURRENT_MODE_CFG_BIT BIT(0)
#define OTG_ENG_OTG_CFG 0x1C0
#define ENG_BUCKBOOST_HALT1_8_MODE_BIT BIT(0)
#define APSD_STATUS 0x307
#define APSD_STATUS_7_BIT BIT(7)
#define HVDCP_CHECK_TIMEOUT_BIT BIT(6)
#define SLOW_PLUGIN_TIMEOUT_BIT BIT(5)
#define ENUMERATION_DONE_BIT BIT(4)
#define VADP_CHANGE_DONE_AFTER_AUTH_BIT BIT(3)
#define QC_AUTH_DONE_STATUS_BIT BIT(2)
#define QC_CHARGER_BIT BIT(1)
#define APSD_DTC_STATUS_DONE_BIT BIT(0)
#define APSD_RESULT_STATUS 0x308
#define ICL_OVERRIDE_LATCH_BIT BIT(7)
#define APSD_RESULT_STATUS_MASK GENMASK(6, 0)
#define QC_3P0_BIT BIT(6)
#define QC_2P0_BIT BIT(5)
#define FLOAT_CHARGER_BIT BIT(4)
#define DCP_CHARGER_BIT BIT(3)
#define CDP_CHARGER_BIT BIT(2)
#define OCP_CHARGER_BIT BIT(1)
#define SDP_CHARGER_BIT BIT(0)
#define TYPE_C_STATUS_1 0x30B
#define UFP_TYPEC_MASK GENMASK(7, 5)
#define UFP_TYPEC_RDSTD_BIT BIT(7)
#define UFP_TYPEC_RD1P5_BIT BIT(6)
#define UFP_TYPEC_RD3P0_BIT BIT(5)
#define UFP_TYPEC_FMB_255K_BIT BIT(4)
#define UFP_TYPEC_FMB_301K_BIT BIT(3)
#define UFP_TYPEC_FMB_523K_BIT BIT(2)
#define UFP_TYPEC_FMB_619K_BIT BIT(1)
#define UFP_TYPEC_OPEN_OPEN_BIT BIT(0)
#define TYPE_C_STATUS_2 0x30C
#define DFP_RA_OPEN_BIT BIT(7)
#define TIMER_STAGE_BIT BIT(6)
#define EXIT_UFP_MODE_BIT BIT(5)
#define EXIT_DFP_MODE_BIT BIT(4)
#define DFP_TYPEC_MASK GENMASK(3, 0)
#define DFP_RD_OPEN_BIT BIT(3)
#define DFP_RD_RA_VCONN_BIT BIT(2)
#define DFP_RD_RD_BIT BIT(1)
#define DFP_RA_RA_BIT BIT(0)
#define TYPE_C_STATUS_3 0x30D
#define ENABLE_BANDGAP_BIT BIT(7)
#define U_USB_GND_NOVBUS_BIT BIT(6)
#define U_USB_FLOAT_NOVBUS_BIT BIT(5)
#define U_USB_GND_BIT BIT(4)
#define U_USB_FMB1_BIT BIT(3)
#define U_USB_FLOAT1_BIT BIT(2)
#define U_USB_FMB2_BIT BIT(1)
#define U_USB_FLOAT2_BIT BIT(0)
#define TYPE_C_STATUS_4 0x30E
#define UFP_DFP_MODE_STATUS_BIT BIT(7)
#define TYPEC_VBUS_STATUS_BIT BIT(6)
#define TYPEC_VBUS_ERROR_STATUS_BIT BIT(5)
#define TYPEC_DEBOUNCE_DONE_STATUS_BIT BIT(4)
#define TYPEC_UFP_AUDIO_ADAPT_STATUS_BIT BIT(3)
#define TYPEC_VCONN_OVERCURR_STATUS_BIT BIT(2)
#define CC_ORIENTATION_BIT BIT(1)
#define CC_ATTACHED_BIT BIT(0)
#define TYPE_C_STATUS_5 0x30F
#define TRY_SOURCE_FAILED_BIT BIT(6)
#define TRY_SINK_FAILED_BIT BIT(5)
#define TIMER_STAGE_2_BIT BIT(4)
#define TYPEC_LEGACY_CABLE_STATUS_BIT BIT(3)
#define TYPEC_NONCOMP_LEGACY_CABLE_STATUS_BIT BIT(2)
#define TYPEC_TRYSOURCE_DETECT_STATUS_BIT BIT(1)
#define TYPEC_TRYSINK_DETECT_STATUS_BIT BIT(0)
#define CMD_APSD 0x341
#define ICL_OVERRIDE_BIT BIT(1)
#define APSD_RERUN_BIT BIT(0)
#define TYPE_C_CFG 0x358
#define APSD_START_ON_CC_BIT BIT(7)
#define WAIT_FOR_APSD_BIT BIT(6)
#define FACTORY_MODE_DETECTION_EN_BIT BIT(5)
#define FACTORY_MODE_ICL_3A_4A_BIT BIT(4)
#define FACTORY_MODE_DIS_CHGING_CFG_BIT BIT(3)
#define SUSPEND_NON_COMPLIANT_CFG_BIT BIT(2)
#define VCONN_OC_CFG_BIT BIT(1)
#define TYPE_C_OR_U_USB_BIT BIT(0)
#define TYPE_C_CFG_2 0x359
#define TYPE_C_DFP_CURRSRC_MODE_BIT BIT(7)
#define DFP_CC_1P4V_OR_1P6V_BIT BIT(6)
#define VCONN_SOFTSTART_CFG_MASK GENMASK(5, 4)
#define EN_TRY_SOURCE_MODE_BIT BIT(3)
#define USB_FACTORY_MODE_ENABLE_BIT BIT(2)
#define TYPE_C_UFP_MODE_BIT BIT(1)
#define EN_80UA_180UA_CUR_SOURCE_BIT BIT(0)
#define TYPE_C_CFG_3 0x35A
#define TVBUS_DEBOUNCE_BIT BIT(7)
#define TYPEC_LEGACY_CABLE_INT_EN_BIT BIT(6)
#define TYPEC_NONCOMPLIANT_LEGACY_CABLE_INT_EN_B BIT(5)
#define TYPEC_TRYSOURCE_DETECT_INT_EN_BIT BIT(4)
#define TYPEC_TRYSINK_DETECT_INT_EN_BIT BIT(3)
#define EN_TRYSINK_MODE_BIT BIT(2)
#define EN_LEGACY_CABLE_DETECTION_BIT BIT(1)
#define ALLOW_PD_DRING_UFP_TCCDB_BIT BIT(0)
#define USBIN_OPTIONS_1_CFG 0x362
#define CABLE_R_SEL_BIT BIT(7)
#define HVDCP_AUTH_ALG_EN_CFG_BIT BIT(6)
#define HVDCP_AUTONOMOUS_MODE_EN_CFG_BIT BIT(5)
#define INPUT_PRIORITY_BIT BIT(4)
#define AUTO_SRC_DETECT_BIT BIT(3)
#define HVDCP_EN_BIT BIT(2)
#define VADP_INCREMENT_VOLTAGE_LIMIT_BIT BIT(1)
#define VADP_TAPER_TIMER_EN_BIT BIT(0)
#define USBIN_OPTIONS_2_CFG 0x363
#define WIPWR_RST_EUD_CFG_BIT BIT(7)
#define SWITCHER_START_CFG_BIT BIT(6)
#define DCD_TIMEOUT_SEL_BIT BIT(5)
#define OCD_CURRENT_SEL_BIT BIT(4)
#define SLOW_PLUGIN_TIMER_EN_CFG_BIT BIT(3)
#define FLOAT_OPTIONS_MASK GENMASK(2, 0)
#define FLOAT_DIS_CHGING_CFG_BIT BIT(2)
#define SUSPEND_FLOAT_CFG_BIT BIT(1)
#define FORCE_FLOAT_SDP_CFG_BIT BIT(0)
#define TAPER_TIMER_SEL_CFG 0x364
#define TYPEC_SPARE_CFG_BIT BIT(7)
#define TYPEC_DRP_DFP_TIME_CFG_BIT BIT(5)
#define TAPER_TIMER_SEL_MASK GENMASK(1, 0)
#define USBIN_LOAD_CFG 0x365
#define USBIN_OV_CH_LOAD_OPTION_BIT BIT(7)
#define ICL_OVERRIDE_AFTER_APSD_BIT BIT(4)
#define USBIN_ICL_OPTIONS 0x366
#define CFG_USB3P0_SEL_BIT BIT(2)
#define USB51_MODE_BIT BIT(1)
#define USBIN_MODE_CHG_BIT BIT(0)
#define TYPE_C_INTRPT_ENB_SOFTWARE_CTRL 0x368
#define EXIT_SNK_BASED_ON_CC_BIT BIT(7)
#define VCONN_EN_ORIENTATION_BIT BIT(6)
#define TYPEC_VCONN_OVERCURR_INT_EN_BIT BIT(5)
#define VCONN_EN_SRC_BIT BIT(4)
#define VCONN_EN_VALUE_BIT BIT(3)
#define TYPEC_POWER_ROLE_CMD_MASK GENMASK(2, 0)
#define UFP_EN_CMD_BIT BIT(2)
#define DFP_EN_CMD_BIT BIT(1)
#define TYPEC_DISABLE_CMD_BIT BIT(0)
#define USBIN_CURRENT_LIMIT_CFG 0x370
#define USBIN_CURRENT_LIMIT_MASK GENMASK(7, 0)
#define USBIN_AICL_OPTIONS_CFG 0x380
#define SUSPEND_ON_COLLAPSE_USBIN_BIT BIT(7)
#define USBIN_AICL_HDC_EN_BIT BIT(6)
#define USBIN_AICL_START_AT_MAX_BIT BIT(5)
#define USBIN_AICL_RERUN_EN_BIT BIT(4)
#define USBIN_AICL_ADC_EN_BIT BIT(3)
#define USBIN_AICL_EN_BIT BIT(2)
#define USBIN_HV_COLLAPSE_RESPONSE_BIT BIT(1)
#define USBIN_LV_COLLAPSE_RESPONSE_BIT BIT(0)
#define USBIN_5V_AICL_THRESHOLD_CFG 0x381
#define USBIN_5V_AICL_THRESHOLD_CFG_MASK GENMASK(2, 0)
#define USBIN_CONT_AICL_THRESHOLD_CFG 0x384
#define USBIN_CONT_AICL_THRESHOLD_CFG_MASK GENMASK(5, 0)
#define DC_ENG_SSUPPLY_CFG2 0x4C1
#define ENG_SSUPPLY_IVREF_OTG_SS_MASK GENMASK(2, 0)
#define OTG_SS_SLOW 0x3
#define DCIN_AICL_REF_SEL_CFG 0x481
#define DCIN_CONT_AICL_THRESHOLD_CFG_MASK GENMASK(5, 0)
#define WI_PWR_OPTIONS 0x495
#define CHG_OK_BIT BIT(7)
#define WIPWR_UVLO_IRQ_OPT_BIT BIT(6)
#define BUCK_HOLDOFF_ENABLE_BIT BIT(5)
#define CHG_OK_HW_SW_SELECT_BIT BIT(4)
#define WIPWR_RST_ENABLE_BIT BIT(3)
#define DCIN_WIPWR_IRQ_SELECT_BIT BIT(2)
#define AICL_SWITCH_ENABLE_BIT BIT(1)
#define ZIN_ICL_ENABLE_BIT BIT(0)
#define ICL_STATUS 0x607
#define INPUT_CURRENT_LIMIT_MASK GENMASK(7, 0)
#define POWER_PATH_STATUS 0x60B
#define P_PATH_INPUT_SS_DONE_BIT BIT(7)
#define P_PATH_USBIN_SUSPEND_STS_BIT BIT(6)
#define P_PATH_DCIN_SUSPEND_STS_BIT BIT(5)
#define P_PATH_USE_USBIN_BIT BIT(4)
#define P_PATH_USE_DCIN_BIT BIT(3)
#define P_PATH_POWER_PATH_MASK GENMASK(2, 1)
#define P_PATH_VALID_INPUT_POWER_SOURCE_STS_BIT BIT(0)
#define BARK_BITE_WDOG_PET 0x643
#define BARK_BITE_WDOG_PET_BIT BIT(0)
#define WD_CFG 0x651
#define WATCHDOG_TRIGGER_AFP_EN_BIT BIT(7)
#define BARK_WDOG_INT_EN_BIT BIT(6)
#define BITE_WDOG_INT_EN_BIT BIT(5)
#define SFT_AFTER_WDOG_IRQ_MASK GENMASK(4, 3)
#define WDOG_IRQ_SFT_BIT BIT(2)
#define WDOG_TIMER_EN_ON_PLUGIN_BIT BIT(1)
#define WDOG_TIMER_EN_BIT BIT(0)
#define SNARL_BARK_BITE_WD_CFG 0x653
#define BITE_WDOG_DISABLE_CHARGING_CFG_BIT BIT(7)
#define SNARL_WDOG_TIMEOUT_MASK GENMASK(6, 4)
#define BARK_WDOG_TIMEOUT_MASK GENMASK(3, 2)
#define BITE_WDOG_TIMEOUT_MASK GENMASK(1, 0)
#define AICL_RERUN_TIME_CFG 0x661
#define AICL_RERUN_TIME_MASK GENMASK(1, 0)
#define STAT_CFG 0x690
#define STAT_SW_OVERRIDE_VALUE_BIT BIT(7)
#define STAT_SW_OVERRIDE_CFG_BIT BIT(6)
#define STAT_PARALLEL_OFF_DG_CFG_MASK GENMASK(5, 4)
#define STAT_POLARITY_CFG_BIT BIT(3)
#define STAT_PARALLEL_CFG_BIT BIT(2)
#define STAT_FUNCTION_CFG_BIT BIT(1)
#define STAT_IRQ_PULSING_EN_BIT BIT(0)
#define SDP_CURRENT_UA 500000
#define CDP_CURRENT_UA 1500000
#define DCP_CURRENT_UA 1500000
#define CURRENT_MAX_UA DCP_CURRENT_UA
/* pmi8998 registers represent current in increments of 1/40th of an amp */
#define CURRENT_SCALE_FACTOR 25000
/* clang-format on */
enum charger_status {
TRICKLE_CHARGE = 0,
PRE_CHARGE,
FAST_CHARGE,
FULLON_CHARGE,
TAPER_CHARGE,
TERMINATE_CHARGE,
INHIBIT_CHARGE,
DISABLE_CHARGE,
};
struct smb2_register {
u16 addr;
u8 mask;
u8 val;
};
/**
* struct smb2_chip - smb2 chip structure
* @dev: Device reference for power_supply
* @name: The platform device name
* @base: Base address for smb2 registers
* @regmap: Register map
* @batt_info: Battery data from DT
* @status_change_work: Worker to handle plug/unplug events
* @cable_irq: USB plugin IRQ
* @wakeup_enabled: If the cable IRQ will cause a wakeup
* @usb_in_i_chan: USB_IN current measurement channel
* @usb_in_v_chan: USB_IN voltage measurement channel
* @chg_psy: Charger power supply instance
*/
struct smb2_chip {
struct device *dev;
const char *name;
unsigned int base;
struct regmap *regmap;
struct power_supply_battery_info *batt_info;
struct delayed_work status_change_work;
int cable_irq;
bool wakeup_enabled;
struct iio_channel *usb_in_i_chan;
struct iio_channel *usb_in_v_chan;
struct power_supply *chg_psy;
};
static enum power_supply_property smb2_properties[] = {
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_USB_TYPE,
};
static enum power_supply_usb_type smb2_usb_types[] = {
POWER_SUPPLY_USB_TYPE_UNKNOWN,
POWER_SUPPLY_USB_TYPE_SDP,
POWER_SUPPLY_USB_TYPE_DCP,
POWER_SUPPLY_USB_TYPE_CDP,
};
static int smb2_get_prop_usb_online(struct smb2_chip *chip, int *val)
{
unsigned int stat;
int rc;
rc = regmap_read(chip->regmap, chip->base + POWER_PATH_STATUS, &stat);
if (rc < 0) {
dev_err(chip->dev, "Couldn't read power path status: %d\n", rc);
return rc;
}
*val = (stat & P_PATH_USE_USBIN_BIT) &&
(stat & P_PATH_VALID_INPUT_POWER_SOURCE_STS_BIT);
return 0;
}
/*
* Qualcomm "automatic power source detection" aka APSD
* tells us what type of charger we're connected to.
*/
static int smb2_apsd_get_charger_type(struct smb2_chip *chip, int *val)
{
unsigned int apsd_stat, stat;
int usb_online = 0;
int rc;
rc = smb2_get_prop_usb_online(chip, &usb_online);
if (!usb_online) {
*val = POWER_SUPPLY_USB_TYPE_UNKNOWN;
return rc;
}
rc = regmap_read(chip->regmap, chip->base + APSD_STATUS, &apsd_stat);
if (rc < 0) {
dev_err(chip->dev, "Failed to read apsd status, rc = %d", rc);
return rc;
}
if (!(apsd_stat & APSD_DTC_STATUS_DONE_BIT)) {
dev_dbg(chip->dev, "Apsd not ready");
return -EAGAIN;
}
rc = regmap_read(chip->regmap, chip->base + APSD_RESULT_STATUS, &stat);
if (rc < 0) {
dev_err(chip->dev, "Failed to read apsd result, rc = %d", rc);
return rc;
}
stat &= APSD_RESULT_STATUS_MASK;
if (stat & CDP_CHARGER_BIT)
*val = POWER_SUPPLY_USB_TYPE_CDP;
else if (stat & (DCP_CHARGER_BIT | OCP_CHARGER_BIT | FLOAT_CHARGER_BIT))
*val = POWER_SUPPLY_USB_TYPE_DCP;
else /* SDP_CHARGER_BIT (or others) */
*val = POWER_SUPPLY_USB_TYPE_SDP;
return 0;
}
static int smb2_get_prop_status(struct smb2_chip *chip, int *val)
{
unsigned char stat[2];
int usb_online = 0;
int rc;
rc = smb2_get_prop_usb_online(chip, &usb_online);
if (!usb_online) {
*val = POWER_SUPPLY_STATUS_DISCHARGING;
return rc;
}
rc = regmap_bulk_read(chip->regmap,
chip->base + BATTERY_CHARGER_STATUS_1, &stat, 2);
if (rc < 0) {
dev_err(chip->dev, "Failed to read charging status ret=%d\n",
rc);
return rc;
}
if (stat[1] & CHARGER_ERROR_STATUS_BAT_OV_BIT) {
*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
return 0;
}
stat[0] = stat[0] & BATTERY_CHARGER_STATUS_MASK;
switch (stat[0]) {
case TRICKLE_CHARGE:
case PRE_CHARGE:
case FAST_CHARGE:
case FULLON_CHARGE:
case TAPER_CHARGE:
*val = POWER_SUPPLY_STATUS_CHARGING;
return rc;
case DISABLE_CHARGE:
*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
return rc;
case TERMINATE_CHARGE:
case INHIBIT_CHARGE:
*val = POWER_SUPPLY_STATUS_FULL;
return rc;
default:
*val = POWER_SUPPLY_STATUS_UNKNOWN;
return rc;
}
}
static inline int smb2_get_current_limit(struct smb2_chip *chip,
unsigned int *val)
{
int rc = regmap_read(chip->regmap, chip->base + ICL_STATUS, val);
if (rc >= 0)
*val *= CURRENT_SCALE_FACTOR;
return rc;
}
static int smb2_set_current_limit(struct smb2_chip *chip, unsigned int val)
{
unsigned char val_raw;
if (val > 4800000) {
dev_err(chip->dev,
"Can't set current limit higher than 4800000uA");
return -EINVAL;
}
val_raw = val / CURRENT_SCALE_FACTOR;
return regmap_write(chip->regmap, chip->base + USBIN_CURRENT_LIMIT_CFG,
val_raw);
}
static void smb2_status_change_work(struct work_struct *work)
{
unsigned int charger_type, current_ua;
int usb_online = 0;
int count, rc;
struct smb2_chip *chip;
chip = container_of(work, struct smb2_chip, status_change_work.work);
smb2_get_prop_usb_online(chip, &usb_online);
if (!usb_online)
return;
for (count = 0; count < 3; count++) {
dev_dbg(chip->dev, "get charger type retry %d\n", count);
rc = smb2_apsd_get_charger_type(chip, &charger_type);
if (rc != -EAGAIN)
break;
msleep(100);
}
if (rc < 0 && rc != -EAGAIN) {
dev_err(chip->dev, "get charger type failed: %d\n", rc);
return;
}
if (rc < 0) {
rc = regmap_update_bits(chip->regmap, chip->base + CMD_APSD,
APSD_RERUN_BIT, APSD_RERUN_BIT);
schedule_delayed_work(&chip->status_change_work,
msecs_to_jiffies(1000));
dev_dbg(chip->dev, "get charger type failed, rerun apsd\n");
return;
}
switch (charger_type) {
case POWER_SUPPLY_USB_TYPE_CDP:
current_ua = CDP_CURRENT_UA;
break;
case POWER_SUPPLY_USB_TYPE_DCP:
current_ua = DCP_CURRENT_UA;
break;
case POWER_SUPPLY_USB_TYPE_SDP:
default:
current_ua = SDP_CURRENT_UA;
break;
}
smb2_set_current_limit(chip, current_ua);
power_supply_changed(chip->chg_psy);
}
static int smb2_get_iio_chan(struct smb2_chip *chip, struct iio_channel *chan,
int *val)
{
int rc;
union power_supply_propval status;
rc = power_supply_get_property(chip->chg_psy, POWER_SUPPLY_PROP_STATUS,
&status);
if (rc < 0 || status.intval != POWER_SUPPLY_STATUS_CHARGING) {
*val = 0;
return 0;
}
if (IS_ERR(chan)) {
dev_err(chip->dev, "Failed to chan, err = %li", PTR_ERR(chan));
return PTR_ERR(chan);
}
return iio_read_channel_processed(chan, val);
}
static int smb2_get_prop_health(struct smb2_chip *chip, int *val)
{
int rc;
unsigned int stat;
rc = regmap_read(chip->regmap, chip->base + BATTERY_CHARGER_STATUS_2,
&stat);
if (rc < 0) {
dev_err(chip->dev, "Couldn't read charger status rc=%d\n", rc);
return rc;
}
switch (stat) {
case CHARGER_ERROR_STATUS_BAT_OV_BIT:
*val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
return 0;
case BAT_TEMP_STATUS_TOO_COLD_BIT:
*val = POWER_SUPPLY_HEALTH_COLD;
return 0;
case BAT_TEMP_STATUS_TOO_HOT_BIT:
*val = POWER_SUPPLY_HEALTH_OVERHEAT;
return 0;
case BAT_TEMP_STATUS_COLD_SOFT_LIMIT_BIT:
*val = POWER_SUPPLY_HEALTH_COOL;
return 0;
case BAT_TEMP_STATUS_HOT_SOFT_LIMIT_BIT:
*val = POWER_SUPPLY_HEALTH_WARM;
return 0;
default:
*val = POWER_SUPPLY_HEALTH_GOOD;
return 0;
}
}
static int smb2_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct smb2_chip *chip = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = "Qualcomm";
return 0;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = chip->name;
return 0;
case POWER_SUPPLY_PROP_CURRENT_MAX:
return smb2_get_current_limit(chip, &val->intval);
case POWER_SUPPLY_PROP_CURRENT_NOW:
return smb2_get_iio_chan(chip, chip->usb_in_i_chan,
&val->intval);
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
return smb2_get_iio_chan(chip, chip->usb_in_v_chan,
&val->intval);
case POWER_SUPPLY_PROP_ONLINE:
return smb2_get_prop_usb_online(chip, &val->intval);
case POWER_SUPPLY_PROP_STATUS:
return smb2_get_prop_status(chip, &val->intval);
case POWER_SUPPLY_PROP_HEALTH:
return smb2_get_prop_health(chip, &val->intval);
case POWER_SUPPLY_PROP_USB_TYPE:
return smb2_apsd_get_charger_type(chip, &val->intval);
default:
dev_err(chip->dev, "invalid property: %d\n", psp);
return -EINVAL;
}
}
static int smb2_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct smb2_chip *chip = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_CURRENT_MAX:
return smb2_set_current_limit(chip, val->intval);
default:
dev_err(chip->dev, "No setter for property: %d\n", psp);
return -EINVAL;
}
}
static int smb2_property_is_writable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_CURRENT_MAX:
return 1;
default:
return 0;
}
}
static irqreturn_t smb2_handle_batt_overvoltage(int irq, void *data)
{
struct smb2_chip *chip = data;
unsigned int status;
regmap_read(chip->regmap, chip->base + BATTERY_CHARGER_STATUS_2,
&status);
if (status & CHARGER_ERROR_STATUS_BAT_OV_BIT) {
/* The hardware stops charging automatically */
dev_err(chip->dev, "battery overvoltage detected\n");
power_supply_changed(chip->chg_psy);
}
return IRQ_HANDLED;
}
static irqreturn_t smb2_handle_usb_plugin(int irq, void *data)
{
struct smb2_chip *chip = data;
power_supply_changed(chip->chg_psy);
schedule_delayed_work(&chip->status_change_work,
msecs_to_jiffies(1500));
return IRQ_HANDLED;
}
static irqreturn_t smb2_handle_usb_icl_change(int irq, void *data)
{
struct smb2_chip *chip = data;
power_supply_changed(chip->chg_psy);
return IRQ_HANDLED;
}
static irqreturn_t smb2_handle_wdog_bark(int irq, void *data)
{
struct smb2_chip *chip = data;
int rc;
power_supply_changed(chip->chg_psy);
rc = regmap_write(chip->regmap, BARK_BITE_WDOG_PET,
BARK_BITE_WDOG_PET_BIT);
if (rc < 0)
dev_err(chip->dev, "Couldn't pet the dog rc=%d\n", rc);
return IRQ_HANDLED;
}
static const struct power_supply_desc smb2_psy_desc = {
.name = "pmi8998_charger",
.type = POWER_SUPPLY_TYPE_USB,
.usb_types = smb2_usb_types,
.num_usb_types = ARRAY_SIZE(smb2_usb_types),
.properties = smb2_properties,
.num_properties = ARRAY_SIZE(smb2_properties),
.get_property = smb2_get_property,
.set_property = smb2_set_property,
.property_is_writeable = smb2_property_is_writable,
};
/* Init sequence derived from vendor downstream driver */
static const struct smb2_register smb2_init_seq[] = {
{ .addr = AICL_RERUN_TIME_CFG, .mask = AICL_RERUN_TIME_MASK, .val = 0 },
/*
* By default configure us as an upstream facing port
* FIXME: This will be handled by the type-c driver
*/
{ .addr = TYPE_C_INTRPT_ENB_SOFTWARE_CTRL,
.mask = TYPEC_POWER_ROLE_CMD_MASK | VCONN_EN_SRC_BIT |
VCONN_EN_VALUE_BIT,
.val = VCONN_EN_SRC_BIT },
/*
* Disable Type-C factory mode and stay in Attached.SRC state when VCONN
* over-current happens
*/
{ .addr = TYPE_C_CFG,
.mask = FACTORY_MODE_DETECTION_EN_BIT | VCONN_OC_CFG_BIT,
.val = 0 },
/* Configure VBUS for software control */
{ .addr = OTG_CFG, .mask = OTG_EN_SRC_CFG_BIT, .val = 0 },
/*
* Use VBAT to determine the recharge threshold when battery is full
* rather than the state of charge.
*/
{ .addr = FG_UPDATE_CFG_2_SEL,
.mask = SOC_LT_CHG_RECHARGE_THRESH_SEL_BIT |
VBT_LT_CHG_RECHARGE_THRESH_SEL_BIT,
.val = VBT_LT_CHG_RECHARGE_THRESH_SEL_BIT },
/* Enable charging */
{ .addr = USBIN_OPTIONS_1_CFG, .mask = HVDCP_EN_BIT, .val = 0 },
{ .addr = CHARGING_ENABLE_CMD,
.mask = CHARGING_ENABLE_CMD_BIT,
.val = CHARGING_ENABLE_CMD_BIT },
/*
* Match downstream defaults
* CHG_EN_SRC_BIT - charger enable is controlled by software
* CHG_EN_POLARITY_BIT - polarity of charge enable pin when in HW control
* pulled low on OnePlus 6 and SHIFT6mq
* PRETOFAST_TRANSITION_CFG_BIT -
* BAT_OV_ECC_BIT -
* I_TERM_BIT - Current termination ?? 0 = enabled
* AUTO_RECHG_BIT - Enable automatic recharge when battery is full
* 0 = enabled
* EN_ANALOG_DROP_IN_VBATT_BIT
* CHARGER_INHIBIT_BIT - Inhibit charging based on battery voltage
* instead of ??
*/
{ .addr = CHGR_CFG2,
.mask = CHG_EN_SRC_BIT | CHG_EN_POLARITY_BIT |
PRETOFAST_TRANSITION_CFG_BIT | BAT_OV_ECC_BIT | I_TERM_BIT |
AUTO_RECHG_BIT | EN_ANALOG_DROP_IN_VBATT_BIT |
CHARGER_INHIBIT_BIT,
.val = CHARGER_INHIBIT_BIT },
/* STAT pin software override, match downstream. Parallell charging? */
{ .addr = STAT_CFG,
.mask = STAT_SW_OVERRIDE_CFG_BIT,
.val = STAT_SW_OVERRIDE_CFG_BIT },
/* Set the default SDP charger type to a 500ma USB 2.0 port */
{ .addr = USBIN_ICL_OPTIONS,
.mask = USB51_MODE_BIT | USBIN_MODE_CHG_BIT,
.val = USB51_MODE_BIT },
/* Disable watchdog */
{ .addr = SNARL_BARK_BITE_WD_CFG, .mask = 0xff, .val = 0 },
{ .addr = WD_CFG,
.mask = WATCHDOG_TRIGGER_AFP_EN_BIT | WDOG_TIMER_EN_ON_PLUGIN_BIT |
BARK_WDOG_INT_EN_BIT,
.val = 0 },
/* These bits aren't documented anywhere */
{ .addr = USBIN_5V_AICL_THRESHOLD_CFG,
.mask = USBIN_5V_AICL_THRESHOLD_CFG_MASK,
.val = 0x3 },
{ .addr = USBIN_CONT_AICL_THRESHOLD_CFG,
.mask = USBIN_CONT_AICL_THRESHOLD_CFG_MASK,
.val = 0x3 },
/*
* Enable Automatic Input Current Limit, this will slowly ramp up the current
* When connected to a wall charger, and automatically stop when it detects
* the charger current limit (voltage drop?) or it reaches the programmed limit.
*/
{ .addr = USBIN_AICL_OPTIONS_CFG,
.mask = USBIN_AICL_START_AT_MAX_BIT | USBIN_AICL_ADC_EN_BIT |
USBIN_AICL_EN_BIT | SUSPEND_ON_COLLAPSE_USBIN_BIT |
USBIN_HV_COLLAPSE_RESPONSE_BIT |
USBIN_LV_COLLAPSE_RESPONSE_BIT,
.val = USBIN_HV_COLLAPSE_RESPONSE_BIT |
USBIN_LV_COLLAPSE_RESPONSE_BIT | USBIN_AICL_EN_BIT },
/*
* Set pre charge current to default, the OnePlus 6 bootloader
* sets this very conservatively.
*/
{ .addr = PRE_CHARGE_CURRENT_CFG,
.mask = PRE_CHARGE_CURRENT_SETTING_MASK,
.val = 500000 / CURRENT_SCALE_FACTOR },
/*
* This overrides all of the current limit options exposed to userspace
* and prevents the device from pulling more than ~1A. This is done
* to minimise potential fire hazard risks.
*/
{ .addr = FAST_CHARGE_CURRENT_CFG,
.mask = FAST_CHARGE_CURRENT_SETTING_MASK,
.val = 1000000 / CURRENT_SCALE_FACTOR },
};
static int smb2_init_hw(struct smb2_chip *chip)
{
int rc, i;
for (i = 0; i < ARRAY_SIZE(smb2_init_seq); i++) {
dev_dbg(chip->dev, "%d: Writing 0x%02x to 0x%02x\n", i,
smb2_init_seq[i].val, smb2_init_seq[i].addr);
rc = regmap_update_bits(chip->regmap,
chip->base + smb2_init_seq[i].addr,
smb2_init_seq[i].mask,
smb2_init_seq[i].val);
if (rc < 0)
return dev_err_probe(chip->dev, rc,
"%s: init command %d failed\n",
__func__, i);
}
return 0;
}
static int smb2_init_irq(struct smb2_chip *chip, int *irq, const char *name,
irqreturn_t (*handler)(int irq, void *data))
{
int irqnum;
int rc;
irqnum = platform_get_irq_byname(to_platform_device(chip->dev), name);
if (irqnum < 0)
return dev_err_probe(chip->dev, irqnum,
"Couldn't get irq %s byname\n", name);
rc = devm_request_threaded_irq(chip->dev, irqnum, NULL, handler,
IRQF_ONESHOT, name, chip);
if (rc < 0)
return dev_err_probe(chip->dev, rc, "Couldn't request irq %s\n",
name);
if (irq)
*irq = irqnum;
return 0;
}
static int smb2_probe(struct platform_device *pdev)
{
struct power_supply_config supply_config = {};
struct power_supply_desc *desc;
struct smb2_chip *chip;
int rc, irq;
chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->dev = &pdev->dev;
chip->name = pdev->name;
chip->regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!chip->regmap)
return dev_err_probe(chip->dev, -ENODEV,
"failed to locate the regmap\n");
rc = device_property_read_u32(chip->dev, "reg", &chip->base);
if (rc < 0)
return dev_err_probe(chip->dev, rc,
"Couldn't read base address\n");
chip->usb_in_v_chan = devm_iio_channel_get(chip->dev, "usbin_v");
if (IS_ERR(chip->usb_in_v_chan))
return dev_err_probe(chip->dev, PTR_ERR(chip->usb_in_v_chan),
"Couldn't get usbin_v IIO channel\n");
chip->usb_in_i_chan = devm_iio_channel_get(chip->dev, "usbin_i");
if (IS_ERR(chip->usb_in_i_chan)) {
return dev_err_probe(chip->dev, PTR_ERR(chip->usb_in_i_chan),
"Couldn't get usbin_i IIO channel\n");
}
rc = smb2_init_hw(chip);
if (rc < 0)
return rc;
supply_config.drv_data = chip;
supply_config.of_node = pdev->dev.of_node;
desc = devm_kzalloc(chip->dev, sizeof(smb2_psy_desc), GFP_KERNEL);
memcpy(desc, &smb2_psy_desc, sizeof(smb2_psy_desc));
desc->name =
devm_kasprintf(chip->dev, GFP_KERNEL, "%s-charger",
(const char *)device_get_match_data(chip->dev));
chip->chg_psy =
devm_power_supply_register(chip->dev, desc, &supply_config);
if (IS_ERR(chip->chg_psy))
return dev_err_probe(chip->dev, PTR_ERR(chip->chg_psy),
"failed to register power supply\n");
rc = power_supply_get_battery_info(chip->chg_psy, &chip->batt_info);
if (rc)
return dev_err_probe(chip->dev, rc,
"Failed to get battery info\n");
rc = devm_delayed_work_autocancel(chip->dev, &chip->status_change_work,
smb2_status_change_work);
if (rc)
return dev_err_probe(chip->dev, rc,
"Failed to init status change work\n");
rc = (chip->batt_info->voltage_max_design_uv - 3487500) / 7500 + 1;
rc = regmap_update_bits(chip->regmap, chip->base + FLOAT_VOLTAGE_CFG,
FLOAT_VOLTAGE_SETTING_MASK, rc);
if (rc < 0)
return dev_err_probe(chip->dev, rc, "Couldn't set vbat max\n");
rc = smb2_init_irq(chip, &irq, "bat-ov", smb2_handle_batt_overvoltage);
if (rc < 0)
return rc;
rc = smb2_init_irq(chip, &chip->cable_irq, "usb-plugin",
smb2_handle_usb_plugin);
if (rc < 0)
return rc;
rc = smb2_init_irq(chip, &irq, "usbin-icl-change",
smb2_handle_usb_icl_change);
if (rc < 0)
return rc;
rc = smb2_init_irq(chip, &irq, "wdog-bark", smb2_handle_wdog_bark);
if (rc < 0)
return rc;
rc = dev_pm_set_wake_irq(chip->dev, chip->cable_irq);
if (rc < 0)
return dev_err_probe(chip->dev, rc, "Couldn't set wake irq\n");
platform_set_drvdata(pdev, chip);
/* Initialise charger state */
schedule_delayed_work(&chip->status_change_work, 0);
return 0;
}
static const struct of_device_id smb2_match_id_table[] = {
{ .compatible = "qcom,pmi8998-charger", .data = "pmi8998" },
{ .compatible = "qcom,pm660-charger", .data = "pm660" },
{ /* sentinal */ }
};
MODULE_DEVICE_TABLE(of, smb2_match_id_table);
static struct platform_driver qcom_spmi_smb2 = {
.probe = smb2_probe,
.driver = {
.name = "qcom-pmi8998/pm660-charger",
.of_match_table = smb2_match_id_table,
},
};
module_platform_driver(qcom_spmi_smb2);
MODULE_AUTHOR("Caleb Connolly <[email protected]>");
MODULE_DESCRIPTION("Qualcomm SMB2 Charger Driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/qcom_pmi8998_charger.c |
/*
* Battery driver for LEGO MINDSTORMS EV3
*
* Copyright (C) 2017 David Lechner <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/iio/consumer.h>
#include <linux/iio/types.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
struct lego_ev3_battery {
struct iio_channel *iio_v;
struct iio_channel *iio_i;
struct gpio_desc *rechargeable_gpio;
struct power_supply *psy;
int technology;
int v_max;
int v_min;
};
static int lego_ev3_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct lego_ev3_battery *batt = power_supply_get_drvdata(psy);
int ret, val2;
switch (psp) {
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = batt->technology;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
/* battery voltage is iio channel * 2 + Vce of transistor */
ret = iio_read_channel_processed(batt->iio_v, &val->intval);
if (ret)
return ret;
val->intval *= 2000;
val->intval += 50000;
/* plus adjust for shunt resistor drop */
ret = iio_read_channel_processed(batt->iio_i, &val2);
if (ret)
return ret;
val2 *= 1000;
val2 /= 15;
val->intval += val2;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
val->intval = batt->v_max;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
val->intval = batt->v_min;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
/* battery current is iio channel / 15 / 0.05 ohms */
ret = iio_read_channel_processed(batt->iio_i, &val->intval);
if (ret)
return ret;
val->intval *= 20000;
val->intval /= 15;
break;
case POWER_SUPPLY_PROP_SCOPE:
val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
break;
default:
return -EINVAL;
}
return 0;
}
static int lego_ev3_battery_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct lego_ev3_battery *batt = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_TECHNOLOGY:
/*
* Only allow changing technology from Unknown to NiMH. Li-ion
* batteries are automatically detected and should not be
* overridden. Rechargeable AA batteries, on the other hand,
* cannot be automatically detected, and so must be manually
* specified. This should only be set once during system init,
* so there is no mechanism to go back to Unknown.
*/
if (batt->technology != POWER_SUPPLY_TECHNOLOGY_UNKNOWN)
return -EINVAL;
switch (val->intval) {
case POWER_SUPPLY_TECHNOLOGY_NiMH:
batt->technology = POWER_SUPPLY_TECHNOLOGY_NiMH;
batt->v_max = 7800000;
batt->v_min = 5400000;
break;
default:
return -EINVAL;
}
break;
default:
return -EINVAL;
}
return 0;
}
static int lego_ev3_battery_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
struct lego_ev3_battery *batt = power_supply_get_drvdata(psy);
return psp == POWER_SUPPLY_PROP_TECHNOLOGY &&
batt->technology == POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
}
static enum power_supply_property lego_ev3_battery_props[] = {
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_SCOPE,
};
static const struct power_supply_desc lego_ev3_battery_desc = {
.name = "lego-ev3-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = lego_ev3_battery_props,
.num_properties = ARRAY_SIZE(lego_ev3_battery_props),
.get_property = lego_ev3_battery_get_property,
.set_property = lego_ev3_battery_set_property,
.property_is_writeable = lego_ev3_battery_property_is_writeable,
};
static int lego_ev3_battery_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct lego_ev3_battery *batt;
struct power_supply_config psy_cfg = {};
int err;
batt = devm_kzalloc(dev, sizeof(*batt), GFP_KERNEL);
if (!batt)
return -ENOMEM;
platform_set_drvdata(pdev, batt);
batt->iio_v = devm_iio_channel_get(dev, "voltage");
err = PTR_ERR_OR_ZERO(batt->iio_v);
if (err)
return dev_err_probe(dev, err,
"Failed to get voltage iio channel\n");
batt->iio_i = devm_iio_channel_get(dev, "current");
err = PTR_ERR_OR_ZERO(batt->iio_i);
if (err)
return dev_err_probe(dev, err,
"Failed to get current iio channel\n");
batt->rechargeable_gpio = devm_gpiod_get(dev, "rechargeable", GPIOD_IN);
err = PTR_ERR_OR_ZERO(batt->rechargeable_gpio);
if (err)
return dev_err_probe(dev, err,
"Failed to get rechargeable gpio\n");
/*
* The rechargeable battery indication switch cannot be changed without
* removing the battery, so we only need to read it once.
*/
if (gpiod_get_value(batt->rechargeable_gpio)) {
/* 2-cell Li-ion, 7.4V nominal */
batt->technology = POWER_SUPPLY_TECHNOLOGY_LION;
batt->v_max = 84000000;
batt->v_min = 60000000;
} else {
/* 6x AA Alkaline, 9V nominal */
batt->technology = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
batt->v_max = 90000000;
batt->v_min = 48000000;
}
psy_cfg.of_node = pdev->dev.of_node;
psy_cfg.drv_data = batt;
batt->psy = devm_power_supply_register(dev, &lego_ev3_battery_desc,
&psy_cfg);
err = PTR_ERR_OR_ZERO(batt->psy);
if (err) {
dev_err(dev, "failed to register power supply\n");
return err;
}
return 0;
}
static const struct of_device_id of_lego_ev3_battery_match[] = {
{ .compatible = "lego,ev3-battery", },
{ }
};
MODULE_DEVICE_TABLE(of, of_lego_ev3_battery_match);
static struct platform_driver lego_ev3_battery_driver = {
.driver = {
.name = "lego-ev3-battery",
.of_match_table = of_lego_ev3_battery_match,
},
.probe = lego_ev3_battery_probe,
};
module_platform_driver(lego_ev3_battery_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Lechner <[email protected]>");
MODULE_DESCRIPTION("LEGO MINDSTORMS EV3 Battery Driver");
| linux-master | drivers/power/supply/lego_ev3_battery.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Motorola CPCAP PMIC battery charger driver
*
* Copyright (C) 2017 Tony Lindgren <[email protected]>
*
* Rewritten for Linux power framework with some parts based on
* earlier driver found in the Motorola Linux kernel:
*
* Copyright (C) 2009-2010 Motorola, Inc.
*/
#include <linux/atomic.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/gpio/consumer.h>
#include <linux/usb/phy_companion.h>
#include <linux/phy/omap_usb.h>
#include <linux/usb/otg.h>
#include <linux/iio/consumer.h>
#include <linux/mfd/motorola-cpcap.h>
/*
* CPCAP_REG_CRM register bits. For documentation of somewhat similar hardware,
* see NXP "MC13783 Power Management and Audio Circuit Users's Guide"
* MC13783UG.pdf chapter "8.5 Battery Interface Register Summary". The registers
* and values for CPCAP are different, but some of the internal components seem
* similar. Also see the Motorola Linux kernel cpcap-regbits.h. CPCAP_REG_CHRGR_1
* bits that seem to describe the CRM register.
*/
#define CPCAP_REG_CRM_UNUSED_641_15 BIT(15) /* 641 = register number */
#define CPCAP_REG_CRM_UNUSED_641_14 BIT(14) /* 641 = register number */
#define CPCAP_REG_CRM_CHRG_LED_EN BIT(13) /* Charger LED */
#define CPCAP_REG_CRM_RVRSMODE BIT(12) /* USB VBUS output enable */
#define CPCAP_REG_CRM_ICHRG_TR1 BIT(11) /* Trickle charge current */
#define CPCAP_REG_CRM_ICHRG_TR0 BIT(10)
#define CPCAP_REG_CRM_FET_OVRD BIT(9) /* 0 = hardware, 1 = FET_CTRL */
#define CPCAP_REG_CRM_FET_CTRL BIT(8) /* BPFET 1 if FET_OVRD set */
#define CPCAP_REG_CRM_VCHRG3 BIT(7) /* Charge voltage bits */
#define CPCAP_REG_CRM_VCHRG2 BIT(6)
#define CPCAP_REG_CRM_VCHRG1 BIT(5)
#define CPCAP_REG_CRM_VCHRG0 BIT(4)
#define CPCAP_REG_CRM_ICHRG3 BIT(3) /* Charge current bits */
#define CPCAP_REG_CRM_ICHRG2 BIT(2)
#define CPCAP_REG_CRM_ICHRG1 BIT(1)
#define CPCAP_REG_CRM_ICHRG0 BIT(0)
/* CPCAP_REG_CRM trickle charge voltages */
#define CPCAP_REG_CRM_TR(val) (((val) & 0x3) << 10)
#define CPCAP_REG_CRM_TR_0A00 CPCAP_REG_CRM_TR(0x0)
#define CPCAP_REG_CRM_TR_0A24 CPCAP_REG_CRM_TR(0x1)
#define CPCAP_REG_CRM_TR_0A48 CPCAP_REG_CRM_TR(0x2)
#define CPCAP_REG_CRM_TR_0A72 CPCAP_REG_CRM_TR(0x4)
/*
* CPCAP_REG_CRM charge voltages based on the ADC channel 1 values.
* Note that these register bits don't match MC13783UG.pdf VCHRG
* register bits.
*/
#define CPCAP_REG_CRM_VCHRG(val) (((val) & 0xf) << 4)
#define CPCAP_REG_CRM_VCHRG_3V80 CPCAP_REG_CRM_VCHRG(0x0)
#define CPCAP_REG_CRM_VCHRG_4V10 CPCAP_REG_CRM_VCHRG(0x1)
#define CPCAP_REG_CRM_VCHRG_4V12 CPCAP_REG_CRM_VCHRG(0x2)
#define CPCAP_REG_CRM_VCHRG_4V15 CPCAP_REG_CRM_VCHRG(0x3)
#define CPCAP_REG_CRM_VCHRG_4V17 CPCAP_REG_CRM_VCHRG(0x4)
#define CPCAP_REG_CRM_VCHRG_4V20 CPCAP_REG_CRM_VCHRG(0x5)
#define CPCAP_REG_CRM_VCHRG_4V23 CPCAP_REG_CRM_VCHRG(0x6)
#define CPCAP_REG_CRM_VCHRG_4V25 CPCAP_REG_CRM_VCHRG(0x7)
#define CPCAP_REG_CRM_VCHRG_4V27 CPCAP_REG_CRM_VCHRG(0x8)
#define CPCAP_REG_CRM_VCHRG_4V30 CPCAP_REG_CRM_VCHRG(0x9)
#define CPCAP_REG_CRM_VCHRG_4V33 CPCAP_REG_CRM_VCHRG(0xa)
#define CPCAP_REG_CRM_VCHRG_4V35 CPCAP_REG_CRM_VCHRG(0xb)
#define CPCAP_REG_CRM_VCHRG_4V38 CPCAP_REG_CRM_VCHRG(0xc)
#define CPCAP_REG_CRM_VCHRG_4V40 CPCAP_REG_CRM_VCHRG(0xd)
#define CPCAP_REG_CRM_VCHRG_4V42 CPCAP_REG_CRM_VCHRG(0xe)
#define CPCAP_REG_CRM_VCHRG_4V44 CPCAP_REG_CRM_VCHRG(0xf)
/*
* CPCAP_REG_CRM charge currents. These seem to match MC13783UG.pdf
* values in "Table 8-3. Charge Path Regulator Current Limit
* Characteristics" for the nominal values.
*
* Except 70mA and 1.596A and unlimited, these are simply 88.7mA / step.
*/
#define CPCAP_REG_CRM_ICHRG(val) (((val) & 0xf) << 0)
#define CPCAP_REG_CRM_ICHRG_0A000 CPCAP_REG_CRM_ICHRG(0x0)
#define CPCAP_REG_CRM_ICHRG_0A070 CPCAP_REG_CRM_ICHRG(0x1)
#define CPCAP_REG_CRM_ICHRG_0A177 CPCAP_REG_CRM_ICHRG(0x2)
#define CPCAP_REG_CRM_ICHRG_0A266 CPCAP_REG_CRM_ICHRG(0x3)
#define CPCAP_REG_CRM_ICHRG_0A355 CPCAP_REG_CRM_ICHRG(0x4)
#define CPCAP_REG_CRM_ICHRG_0A443 CPCAP_REG_CRM_ICHRG(0x5)
#define CPCAP_REG_CRM_ICHRG_0A532 CPCAP_REG_CRM_ICHRG(0x6)
#define CPCAP_REG_CRM_ICHRG_0A621 CPCAP_REG_CRM_ICHRG(0x7)
#define CPCAP_REG_CRM_ICHRG_0A709 CPCAP_REG_CRM_ICHRG(0x8)
#define CPCAP_REG_CRM_ICHRG_0A798 CPCAP_REG_CRM_ICHRG(0x9)
#define CPCAP_REG_CRM_ICHRG_0A886 CPCAP_REG_CRM_ICHRG(0xa)
#define CPCAP_REG_CRM_ICHRG_0A975 CPCAP_REG_CRM_ICHRG(0xb)
#define CPCAP_REG_CRM_ICHRG_1A064 CPCAP_REG_CRM_ICHRG(0xc)
#define CPCAP_REG_CRM_ICHRG_1A152 CPCAP_REG_CRM_ICHRG(0xd)
#define CPCAP_REG_CRM_ICHRG_1A596 CPCAP_REG_CRM_ICHRG(0xe)
#define CPCAP_REG_CRM_ICHRG_NO_LIMIT CPCAP_REG_CRM_ICHRG(0xf)
/* CPCAP_REG_VUSBC register bits needed for VBUS */
#define CPCAP_BIT_VBUS_SWITCH BIT(0) /* VBUS boost to 5V */
enum {
CPCAP_CHARGER_IIO_BATTDET,
CPCAP_CHARGER_IIO_VOLTAGE,
CPCAP_CHARGER_IIO_VBUS,
CPCAP_CHARGER_IIO_CHRG_CURRENT,
CPCAP_CHARGER_IIO_BATT_CURRENT,
CPCAP_CHARGER_IIO_NR,
};
struct cpcap_charger_ddata {
struct device *dev;
struct regmap *reg;
struct list_head irq_list;
struct delayed_work detect_work;
struct delayed_work vbus_work;
struct gpio_desc *gpio[2]; /* gpio_reven0 & 1 */
struct iio_channel *channels[CPCAP_CHARGER_IIO_NR];
struct power_supply *usb;
struct phy_companion comparator; /* For USB VBUS */
unsigned int vbus_enabled:1;
unsigned int feeding_vbus:1;
atomic_t active;
int status;
int voltage;
int limit_current;
};
struct cpcap_interrupt_desc {
int irq;
struct list_head node;
const char *name;
};
struct cpcap_charger_ints_state {
bool chrg_det;
bool rvrs_chrg;
bool vbusov;
bool chrg_se1b;
bool rvrs_mode;
bool chrgcurr2;
bool chrgcurr1;
bool vbusvld;
bool battdetb;
};
static enum power_supply_property cpcap_charger_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
static int cpcap_charger_get_charge_voltage(struct cpcap_charger_ddata *ddata)
{
struct iio_channel *channel;
int error, value = 0;
channel = ddata->channels[CPCAP_CHARGER_IIO_VOLTAGE];
error = iio_read_channel_processed(channel, &value);
if (error < 0) {
dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
return 0;
}
return value;
}
static int cpcap_charger_get_charge_current(struct cpcap_charger_ddata *ddata)
{
struct iio_channel *channel;
int error, value = 0;
channel = ddata->channels[CPCAP_CHARGER_IIO_CHRG_CURRENT];
error = iio_read_channel_processed(channel, &value);
if (error < 0) {
dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
return 0;
}
return value;
}
static int cpcap_charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct cpcap_charger_ddata *ddata = dev_get_drvdata(psy->dev.parent);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
val->intval = ddata->status;
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
val->intval = ddata->limit_current;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
val->intval = ddata->voltage;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
if (ddata->status == POWER_SUPPLY_STATUS_CHARGING)
val->intval = cpcap_charger_get_charge_voltage(ddata) *
1000;
else
val->intval = 0;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
if (ddata->status == POWER_SUPPLY_STATUS_CHARGING)
val->intval = cpcap_charger_get_charge_current(ddata) *
1000;
else
val->intval = 0;
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = ddata->status == POWER_SUPPLY_STATUS_CHARGING;
break;
default:
return -EINVAL;
}
return 0;
}
static int cpcap_charger_match_voltage(int voltage)
{
switch (voltage) {
case 0 ... 4100000 - 1: return 3800000;
case 4100000 ... 4120000 - 1: return 4100000;
case 4120000 ... 4150000 - 1: return 4120000;
case 4150000 ... 4170000 - 1: return 4150000;
case 4170000 ... 4200000 - 1: return 4170000;
case 4200000 ... 4230000 - 1: return 4200000;
case 4230000 ... 4250000 - 1: return 4230000;
case 4250000 ... 4270000 - 1: return 4250000;
case 4270000 ... 4300000 - 1: return 4270000;
case 4300000 ... 4330000 - 1: return 4300000;
case 4330000 ... 4350000 - 1: return 4330000;
case 4350000 ... 4380000 - 1: return 4350000;
case 4380000 ... 4400000 - 1: return 4380000;
case 4400000 ... 4420000 - 1: return 4400000;
case 4420000 ... 4440000 - 1: return 4420000;
case 4440000: return 4440000;
default: return 0;
}
}
static int
cpcap_charger_get_bat_const_charge_voltage(struct cpcap_charger_ddata *ddata)
{
union power_supply_propval prop;
struct power_supply *battery;
int voltage = ddata->voltage;
int error;
battery = power_supply_get_by_name("battery");
if (battery) {
error = power_supply_get_property(battery,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
&prop);
if (!error)
voltage = prop.intval;
power_supply_put(battery);
}
return voltage;
}
static int cpcap_charger_current_to_regval(int microamp)
{
int miliamp = microamp / 1000;
int res;
if (miliamp < 0)
return -EINVAL;
if (miliamp < 70)
return CPCAP_REG_CRM_ICHRG(0x0);
if (miliamp < 177)
return CPCAP_REG_CRM_ICHRG(0x1);
if (miliamp >= 1596)
return CPCAP_REG_CRM_ICHRG(0xe);
res = microamp / 88666;
if (res > 0xd)
res = 0xd;
return CPCAP_REG_CRM_ICHRG(res);
}
static int cpcap_charger_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct cpcap_charger_ddata *ddata = dev_get_drvdata(psy->dev.parent);
int voltage, batvolt;
switch (psp) {
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
if (cpcap_charger_current_to_regval(val->intval) < 0)
return -EINVAL;
ddata->limit_current = val->intval;
schedule_delayed_work(&ddata->detect_work, 0);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
voltage = cpcap_charger_match_voltage(val->intval);
batvolt = cpcap_charger_get_bat_const_charge_voltage(ddata);
if (voltage > batvolt)
voltage = batvolt;
ddata->voltage = voltage;
schedule_delayed_work(&ddata->detect_work, 0);
break;
default:
return -EINVAL;
}
return 0;
}
static int cpcap_charger_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
return 1;
default:
return 0;
}
}
static void cpcap_charger_set_cable_path(struct cpcap_charger_ddata *ddata,
bool enabled)
{
if (!ddata->gpio[0])
return;
gpiod_set_value(ddata->gpio[0], enabled);
}
static void cpcap_charger_set_inductive_path(struct cpcap_charger_ddata *ddata,
bool enabled)
{
if (!ddata->gpio[1])
return;
gpiod_set_value(ddata->gpio[1], enabled);
}
static void cpcap_charger_update_state(struct cpcap_charger_ddata *ddata,
int state)
{
const char *status;
if (state > POWER_SUPPLY_STATUS_FULL) {
dev_warn(ddata->dev, "unknown state: %i\n", state);
return;
}
ddata->status = state;
switch (state) {
case POWER_SUPPLY_STATUS_DISCHARGING:
status = "DISCONNECTED";
break;
case POWER_SUPPLY_STATUS_NOT_CHARGING:
status = "DETECTING";
break;
case POWER_SUPPLY_STATUS_CHARGING:
status = "CHARGING";
break;
case POWER_SUPPLY_STATUS_FULL:
status = "DONE";
break;
default:
return;
}
dev_dbg(ddata->dev, "state: %s\n", status);
}
static int cpcap_charger_disable(struct cpcap_charger_ddata *ddata)
{
int error;
error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 0x3fff,
CPCAP_REG_CRM_FET_OVRD |
CPCAP_REG_CRM_FET_CTRL);
if (error)
dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
return error;
}
static int cpcap_charger_enable(struct cpcap_charger_ddata *ddata,
int max_voltage, int charge_current,
int trickle_current)
{
int error;
if (!max_voltage || !charge_current)
return -EINVAL;
dev_dbg(ddata->dev, "enable: %i %i %i\n",
max_voltage, charge_current, trickle_current);
error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 0x3fff,
CPCAP_REG_CRM_CHRG_LED_EN |
trickle_current |
CPCAP_REG_CRM_FET_OVRD |
CPCAP_REG_CRM_FET_CTRL |
max_voltage |
charge_current);
if (error)
dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
return error;
}
static bool cpcap_charger_vbus_valid(struct cpcap_charger_ddata *ddata)
{
int error, value = 0;
struct iio_channel *channel =
ddata->channels[CPCAP_CHARGER_IIO_VBUS];
error = iio_read_channel_processed(channel, &value);
if (error >= 0)
return value > 3900;
dev_err(ddata->dev, "error reading VBUS: %i\n", error);
return false;
}
/* VBUS control functions for the USB PHY companion */
static void cpcap_charger_vbus_work(struct work_struct *work)
{
struct cpcap_charger_ddata *ddata;
bool vbus = false;
int error;
ddata = container_of(work, struct cpcap_charger_ddata,
vbus_work.work);
if (ddata->vbus_enabled) {
vbus = cpcap_charger_vbus_valid(ddata);
if (vbus) {
dev_dbg(ddata->dev, "VBUS already provided\n");
return;
}
ddata->feeding_vbus = true;
cpcap_charger_set_cable_path(ddata, false);
cpcap_charger_set_inductive_path(ddata, false);
error = cpcap_charger_disable(ddata);
if (error)
goto out_err;
cpcap_charger_update_state(ddata,
POWER_SUPPLY_STATUS_DISCHARGING);
error = regmap_update_bits(ddata->reg, CPCAP_REG_VUSBC,
CPCAP_BIT_VBUS_SWITCH,
CPCAP_BIT_VBUS_SWITCH);
if (error)
goto out_err;
error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
CPCAP_REG_CRM_RVRSMODE,
CPCAP_REG_CRM_RVRSMODE);
if (error)
goto out_err;
} else {
error = regmap_update_bits(ddata->reg, CPCAP_REG_VUSBC,
CPCAP_BIT_VBUS_SWITCH, 0);
if (error)
goto out_err;
error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
CPCAP_REG_CRM_RVRSMODE, 0);
if (error)
goto out_err;
cpcap_charger_set_cable_path(ddata, true);
cpcap_charger_set_inductive_path(ddata, true);
ddata->feeding_vbus = false;
}
return;
out_err:
cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_UNKNOWN);
dev_err(ddata->dev, "%s could not %s vbus: %i\n", __func__,
ddata->vbus_enabled ? "enable" : "disable", error);
}
static int cpcap_charger_set_vbus(struct phy_companion *comparator,
bool enabled)
{
struct cpcap_charger_ddata *ddata =
container_of(comparator, struct cpcap_charger_ddata,
comparator);
ddata->vbus_enabled = enabled;
schedule_delayed_work(&ddata->vbus_work, 0);
return 0;
}
/* Charger interrupt handling functions */
static int cpcap_charger_get_ints_state(struct cpcap_charger_ddata *ddata,
struct cpcap_charger_ints_state *s)
{
int val, error;
error = regmap_read(ddata->reg, CPCAP_REG_INTS1, &val);
if (error)
return error;
s->chrg_det = val & BIT(13);
s->rvrs_chrg = val & BIT(12);
s->vbusov = val & BIT(11);
error = regmap_read(ddata->reg, CPCAP_REG_INTS2, &val);
if (error)
return error;
s->chrg_se1b = val & BIT(13);
s->rvrs_mode = val & BIT(6);
s->chrgcurr2 = val & BIT(5);
s->chrgcurr1 = val & BIT(4);
s->vbusvld = val & BIT(3);
error = regmap_read(ddata->reg, CPCAP_REG_INTS4, &val);
if (error)
return error;
s->battdetb = val & BIT(6);
return 0;
}
static int cpcap_charger_voltage_to_regval(int voltage)
{
int offset;
switch (voltage) {
case 0 ... 4100000 - 1:
return 0;
case 4100000 ... 4200000 - 1:
offset = 1;
break;
case 4200000 ... 4300000 - 1:
offset = 0;
break;
case 4300000 ... 4380000 - 1:
offset = -1;
break;
case 4380000 ... 4440000:
offset = -2;
break;
default:
return 0;
}
return ((voltage - 4100000) / 20000) + offset;
}
static void cpcap_charger_disconnect(struct cpcap_charger_ddata *ddata,
int state, unsigned long delay)
{
int error;
/* Update battery state before disconnecting the charger */
switch (state) {
case POWER_SUPPLY_STATUS_DISCHARGING:
case POWER_SUPPLY_STATUS_FULL:
power_supply_changed(ddata->usb);
break;
default:
break;
}
error = cpcap_charger_disable(ddata);
if (error) {
cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_UNKNOWN);
return;
}
cpcap_charger_update_state(ddata, state);
power_supply_changed(ddata->usb);
schedule_delayed_work(&ddata->detect_work, delay);
}
static void cpcap_usb_detect(struct work_struct *work)
{
struct cpcap_charger_ddata *ddata;
struct cpcap_charger_ints_state s;
int error, new_state;
ddata = container_of(work, struct cpcap_charger_ddata,
detect_work.work);
error = cpcap_charger_get_ints_state(ddata, &s);
if (error)
return;
/* Just init the state if a charger is connected with no chrg_det set */
if (!s.chrg_det && s.chrgcurr1 && s.vbusvld) {
cpcap_charger_update_state(ddata,
POWER_SUPPLY_STATUS_NOT_CHARGING);
return;
}
/*
* If battery voltage is higher than charge voltage, it may have been
* charged to 4.35V by Android. Try again in 10 minutes.
*/
if (cpcap_charger_get_charge_voltage(ddata) > ddata->voltage) {
cpcap_charger_disconnect(ddata,
POWER_SUPPLY_STATUS_NOT_CHARGING,
HZ * 60 * 10);
return;
}
/* Delay for 80ms to avoid vbus bouncing when usb cable is plugged in */
usleep_range(80000, 120000);
/* Throttle chrgcurr2 interrupt for charger done and retry */
switch (ddata->status) {
case POWER_SUPPLY_STATUS_CHARGING:
if (s.chrgcurr2)
break;
new_state = POWER_SUPPLY_STATUS_FULL;
if (s.chrgcurr1 && s.vbusvld) {
cpcap_charger_disconnect(ddata, new_state, HZ * 5);
return;
}
break;
case POWER_SUPPLY_STATUS_FULL:
if (!s.chrgcurr2)
break;
if (s.vbusvld)
new_state = POWER_SUPPLY_STATUS_NOT_CHARGING;
else
new_state = POWER_SUPPLY_STATUS_DISCHARGING;
cpcap_charger_disconnect(ddata, new_state, HZ * 5);
return;
default:
break;
}
if (!ddata->feeding_vbus && cpcap_charger_vbus_valid(ddata) &&
s.chrgcurr1) {
int max_current;
int vchrg, ichrg;
union power_supply_propval val;
struct power_supply *battery;
battery = power_supply_get_by_name("battery");
if (IS_ERR_OR_NULL(battery)) {
dev_err(ddata->dev, "battery power_supply not available %li\n",
PTR_ERR(battery));
return;
}
error = power_supply_get_property(battery, POWER_SUPPLY_PROP_PRESENT, &val);
power_supply_put(battery);
if (error)
goto out_err;
if (val.intval) {
max_current = 1596000;
} else {
dev_info(ddata->dev, "battery not inserted, charging disabled\n");
max_current = 0;
}
if (max_current > ddata->limit_current)
max_current = ddata->limit_current;
ichrg = cpcap_charger_current_to_regval(max_current);
vchrg = cpcap_charger_voltage_to_regval(ddata->voltage);
error = cpcap_charger_enable(ddata,
CPCAP_REG_CRM_VCHRG(vchrg),
ichrg, 0);
if (error)
goto out_err;
cpcap_charger_update_state(ddata,
POWER_SUPPLY_STATUS_CHARGING);
} else {
error = cpcap_charger_disable(ddata);
if (error)
goto out_err;
cpcap_charger_update_state(ddata,
POWER_SUPPLY_STATUS_DISCHARGING);
}
power_supply_changed(ddata->usb);
return;
out_err:
cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_UNKNOWN);
dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
}
static irqreturn_t cpcap_charger_irq_thread(int irq, void *data)
{
struct cpcap_charger_ddata *ddata = data;
if (!atomic_read(&ddata->active))
return IRQ_NONE;
schedule_delayed_work(&ddata->detect_work, 0);
return IRQ_HANDLED;
}
static int cpcap_usb_init_irq(struct platform_device *pdev,
struct cpcap_charger_ddata *ddata,
const char *name)
{
struct cpcap_interrupt_desc *d;
int irq, error;
irq = platform_get_irq_byname(pdev, name);
if (irq < 0)
return -ENODEV;
error = devm_request_threaded_irq(ddata->dev, irq, NULL,
cpcap_charger_irq_thread,
IRQF_SHARED | IRQF_ONESHOT,
name, ddata);
if (error) {
dev_err(ddata->dev, "could not get irq %s: %i\n",
name, error);
return error;
}
d = devm_kzalloc(ddata->dev, sizeof(*d), GFP_KERNEL);
if (!d)
return -ENOMEM;
d->name = name;
d->irq = irq;
list_add(&d->node, &ddata->irq_list);
return 0;
}
static const char * const cpcap_charger_irqs[] = {
/* REG_INT_0 */
"chrg_det", "rvrs_chrg",
/* REG_INT1 */
"chrg_se1b", "se0conn", "rvrs_mode", "chrgcurr2", "chrgcurr1", "vbusvld",
/* REG_INT_3 */
"battdetb",
};
static int cpcap_usb_init_interrupts(struct platform_device *pdev,
struct cpcap_charger_ddata *ddata)
{
int i, error;
for (i = 0; i < ARRAY_SIZE(cpcap_charger_irqs); i++) {
error = cpcap_usb_init_irq(pdev, ddata, cpcap_charger_irqs[i]);
if (error)
return error;
}
return 0;
}
static void cpcap_charger_init_optional_gpios(struct cpcap_charger_ddata *ddata)
{
int i;
for (i = 0; i < 2; i++) {
ddata->gpio[i] = devm_gpiod_get_index(ddata->dev, "mode",
i, GPIOD_OUT_HIGH);
if (IS_ERR(ddata->gpio[i])) {
dev_info(ddata->dev, "no mode change GPIO%i: %li\n",
i, PTR_ERR(ddata->gpio[i]));
ddata->gpio[i] = NULL;
}
}
}
static int cpcap_charger_init_iio(struct cpcap_charger_ddata *ddata)
{
const char * const names[CPCAP_CHARGER_IIO_NR] = {
"battdetb", "battp", "vbus", "chg_isense", "batti",
};
int error, i;
for (i = 0; i < CPCAP_CHARGER_IIO_NR; i++) {
ddata->channels[i] = devm_iio_channel_get(ddata->dev,
names[i]);
if (IS_ERR(ddata->channels[i])) {
error = PTR_ERR(ddata->channels[i]);
goto out_err;
}
if (!ddata->channels[i]->indio_dev) {
error = -ENXIO;
goto out_err;
}
}
return 0;
out_err:
if (error != -EPROBE_DEFER)
dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",
error);
return error;
}
static char *cpcap_charger_supplied_to[] = {
"battery",
};
static const struct power_supply_desc cpcap_charger_usb_desc = {
.name = "usb",
.type = POWER_SUPPLY_TYPE_USB,
.properties = cpcap_charger_props,
.num_properties = ARRAY_SIZE(cpcap_charger_props),
.get_property = cpcap_charger_get_property,
.set_property = cpcap_charger_set_property,
.property_is_writeable = cpcap_charger_property_is_writeable,
};
#ifdef CONFIG_OF
static const struct of_device_id cpcap_charger_id_table[] = {
{
.compatible = "motorola,mapphone-cpcap-charger",
},
{},
};
MODULE_DEVICE_TABLE(of, cpcap_charger_id_table);
#endif
static int cpcap_charger_probe(struct platform_device *pdev)
{
struct cpcap_charger_ddata *ddata;
const struct of_device_id *of_id;
struct power_supply_config psy_cfg = {};
int error;
of_id = of_match_device(of_match_ptr(cpcap_charger_id_table),
&pdev->dev);
if (!of_id)
return -EINVAL;
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
if (!ddata)
return -ENOMEM;
ddata->dev = &pdev->dev;
ddata->voltage = 4200000;
ddata->limit_current = 532000;
ddata->reg = dev_get_regmap(ddata->dev->parent, NULL);
if (!ddata->reg)
return -ENODEV;
INIT_LIST_HEAD(&ddata->irq_list);
INIT_DELAYED_WORK(&ddata->detect_work, cpcap_usb_detect);
INIT_DELAYED_WORK(&ddata->vbus_work, cpcap_charger_vbus_work);
platform_set_drvdata(pdev, ddata);
error = cpcap_charger_init_iio(ddata);
if (error)
return error;
atomic_set(&ddata->active, 1);
psy_cfg.of_node = pdev->dev.of_node;
psy_cfg.drv_data = ddata;
psy_cfg.supplied_to = cpcap_charger_supplied_to;
psy_cfg.num_supplicants = ARRAY_SIZE(cpcap_charger_supplied_to),
ddata->usb = devm_power_supply_register(ddata->dev,
&cpcap_charger_usb_desc,
&psy_cfg);
if (IS_ERR(ddata->usb)) {
error = PTR_ERR(ddata->usb);
dev_err(ddata->dev, "failed to register USB charger: %i\n",
error);
return error;
}
error = cpcap_usb_init_interrupts(pdev, ddata);
if (error)
return error;
ddata->comparator.set_vbus = cpcap_charger_set_vbus;
error = omap_usb2_set_comparator(&ddata->comparator);
if (error == -ENODEV) {
dev_info(ddata->dev, "charger needs phy, deferring probe\n");
return -EPROBE_DEFER;
}
cpcap_charger_init_optional_gpios(ddata);
schedule_delayed_work(&ddata->detect_work, 0);
return 0;
}
static void cpcap_charger_shutdown(struct platform_device *pdev)
{
struct cpcap_charger_ddata *ddata = platform_get_drvdata(pdev);
int error;
atomic_set(&ddata->active, 0);
error = omap_usb2_set_comparator(NULL);
if (error)
dev_warn(ddata->dev, "could not clear USB comparator: %i\n",
error);
error = cpcap_charger_disable(ddata);
if (error) {
cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_UNKNOWN);
dev_warn(ddata->dev, "could not clear charger: %i\n",
error);
}
cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_DISCHARGING);
cancel_delayed_work_sync(&ddata->vbus_work);
cancel_delayed_work_sync(&ddata->detect_work);
}
static int cpcap_charger_remove(struct platform_device *pdev)
{
cpcap_charger_shutdown(pdev);
return 0;
}
static struct platform_driver cpcap_charger_driver = {
.probe = cpcap_charger_probe,
.driver = {
.name = "cpcap-charger",
.of_match_table = of_match_ptr(cpcap_charger_id_table),
},
.shutdown = cpcap_charger_shutdown,
.remove = cpcap_charger_remove,
};
module_platform_driver(cpcap_charger_driver);
MODULE_AUTHOR("Tony Lindgren <[email protected]>");
MODULE_DESCRIPTION("CPCAP Battery Charger Interface driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:cpcap-charger");
| linux-master | drivers/power/supply/cpcap-charger.c |
// SPDX-License-Identifier: GPL-2.0
/*
* BQ27xxx battery monitor I2C driver
*
* Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
* Andrew F. Davis <[email protected]>
*/
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <asm/unaligned.h>
#include <linux/power/bq27xxx_battery.h>
static DEFINE_IDR(battery_id);
static DEFINE_MUTEX(battery_mutex);
static irqreturn_t bq27xxx_battery_irq_handler_thread(int irq, void *data)
{
struct bq27xxx_device_info *di = data;
bq27xxx_battery_update(di);
return IRQ_HANDLED;
}
static int bq27xxx_battery_i2c_read(struct bq27xxx_device_info *di, u8 reg,
bool single)
{
struct i2c_client *client = to_i2c_client(di->dev);
struct i2c_msg msg[2];
u8 data[2];
int ret;
if (!client->adapter)
return -ENODEV;
msg[0].addr = client->addr;
msg[0].flags = 0;
msg[0].buf = ®
msg[0].len = sizeof(reg);
msg[1].addr = client->addr;
msg[1].flags = I2C_M_RD;
msg[1].buf = data;
if (single)
msg[1].len = 1;
else
msg[1].len = 2;
ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
if (ret < 0)
return ret;
if (!single)
ret = get_unaligned_le16(data);
else
ret = data[0];
return ret;
}
static int bq27xxx_battery_i2c_write(struct bq27xxx_device_info *di, u8 reg,
int value, bool single)
{
struct i2c_client *client = to_i2c_client(di->dev);
struct i2c_msg msg;
u8 data[4];
int ret;
if (!client->adapter)
return -ENODEV;
data[0] = reg;
if (single) {
data[1] = (u8) value;
msg.len = 2;
} else {
put_unaligned_le16(value, &data[1]);
msg.len = 3;
}
msg.buf = data;
msg.addr = client->addr;
msg.flags = 0;
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret < 0)
return ret;
if (ret != 1)
return -EINVAL;
return 0;
}
static int bq27xxx_battery_i2c_bulk_read(struct bq27xxx_device_info *di, u8 reg,
u8 *data, int len)
{
struct i2c_client *client = to_i2c_client(di->dev);
int ret;
if (!client->adapter)
return -ENODEV;
ret = i2c_smbus_read_i2c_block_data(client, reg, len, data);
if (ret < 0)
return ret;
if (ret != len)
return -EINVAL;
return 0;
}
static int bq27xxx_battery_i2c_bulk_write(struct bq27xxx_device_info *di,
u8 reg, u8 *data, int len)
{
struct i2c_client *client = to_i2c_client(di->dev);
struct i2c_msg msg;
u8 buf[33];
int ret;
if (!client->adapter)
return -ENODEV;
buf[0] = reg;
memcpy(&buf[1], data, len);
msg.buf = buf;
msg.addr = client->addr;
msg.flags = 0;
msg.len = len + 1;
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret < 0)
return ret;
if (ret != 1)
return -EINVAL;
return 0;
}
static int bq27xxx_battery_i2c_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct bq27xxx_device_info *di;
int ret;
char *name;
int num;
/* Get new ID for the new battery device */
mutex_lock(&battery_mutex);
num = idr_alloc(&battery_id, client, 0, 0, GFP_KERNEL);
mutex_unlock(&battery_mutex);
if (num < 0)
return num;
name = devm_kasprintf(&client->dev, GFP_KERNEL, "%s-%d", id->name, num);
if (!name)
goto err_mem;
di = devm_kzalloc(&client->dev, sizeof(*di), GFP_KERNEL);
if (!di)
goto err_mem;
di->id = num;
di->dev = &client->dev;
di->chip = id->driver_data;
di->name = name;
di->bus.read = bq27xxx_battery_i2c_read;
di->bus.write = bq27xxx_battery_i2c_write;
di->bus.read_bulk = bq27xxx_battery_i2c_bulk_read;
di->bus.write_bulk = bq27xxx_battery_i2c_bulk_write;
ret = bq27xxx_battery_setup(di);
if (ret)
goto err_failed;
/* Schedule a polling after about 1 min */
schedule_delayed_work(&di->work, 60 * HZ);
i2c_set_clientdata(client, di);
if (client->irq) {
ret = request_threaded_irq(client->irq,
NULL, bq27xxx_battery_irq_handler_thread,
IRQF_ONESHOT,
di->name, di);
if (ret) {
dev_err(&client->dev,
"Unable to register IRQ %d error %d\n",
client->irq, ret);
bq27xxx_battery_teardown(di);
goto err_failed;
}
}
return 0;
err_mem:
ret = -ENOMEM;
err_failed:
mutex_lock(&battery_mutex);
idr_remove(&battery_id, num);
mutex_unlock(&battery_mutex);
return ret;
}
static void bq27xxx_battery_i2c_remove(struct i2c_client *client)
{
struct bq27xxx_device_info *di = i2c_get_clientdata(client);
free_irq(client->irq, di);
bq27xxx_battery_teardown(di);
mutex_lock(&battery_mutex);
idr_remove(&battery_id, di->id);
mutex_unlock(&battery_mutex);
}
static const struct i2c_device_id bq27xxx_i2c_id_table[] = {
{ "bq27200", BQ27000 },
{ "bq27210", BQ27010 },
{ "bq27500", BQ2750X },
{ "bq27510", BQ2751X },
{ "bq27520", BQ2752X },
{ "bq27500-1", BQ27500 },
{ "bq27510g1", BQ27510G1 },
{ "bq27510g2", BQ27510G2 },
{ "bq27510g3", BQ27510G3 },
{ "bq27520g1", BQ27520G1 },
{ "bq27520g2", BQ27520G2 },
{ "bq27520g3", BQ27520G3 },
{ "bq27520g4", BQ27520G4 },
{ "bq27521", BQ27521 },
{ "bq27530", BQ27530 },
{ "bq27531", BQ27531 },
{ "bq27541", BQ27541 },
{ "bq27542", BQ27542 },
{ "bq27546", BQ27546 },
{ "bq27742", BQ27742 },
{ "bq27545", BQ27545 },
{ "bq27411", BQ27411 },
{ "bq27421", BQ27421 },
{ "bq27425", BQ27425 },
{ "bq27426", BQ27426 },
{ "bq27441", BQ27441 },
{ "bq27621", BQ27621 },
{ "bq27z561", BQ27Z561 },
{ "bq28z610", BQ28Z610 },
{ "bq34z100", BQ34Z100 },
{ "bq78z100", BQ78Z100 },
{},
};
MODULE_DEVICE_TABLE(i2c, bq27xxx_i2c_id_table);
#ifdef CONFIG_OF
static const struct of_device_id bq27xxx_battery_i2c_of_match_table[] = {
{ .compatible = "ti,bq27200" },
{ .compatible = "ti,bq27210" },
{ .compatible = "ti,bq27500" },
{ .compatible = "ti,bq27510" },
{ .compatible = "ti,bq27520" },
{ .compatible = "ti,bq27500-1" },
{ .compatible = "ti,bq27510g1" },
{ .compatible = "ti,bq27510g2" },
{ .compatible = "ti,bq27510g3" },
{ .compatible = "ti,bq27520g1" },
{ .compatible = "ti,bq27520g2" },
{ .compatible = "ti,bq27520g3" },
{ .compatible = "ti,bq27520g4" },
{ .compatible = "ti,bq27521" },
{ .compatible = "ti,bq27530" },
{ .compatible = "ti,bq27531" },
{ .compatible = "ti,bq27541" },
{ .compatible = "ti,bq27542" },
{ .compatible = "ti,bq27546" },
{ .compatible = "ti,bq27742" },
{ .compatible = "ti,bq27545" },
{ .compatible = "ti,bq27411" },
{ .compatible = "ti,bq27421" },
{ .compatible = "ti,bq27425" },
{ .compatible = "ti,bq27426" },
{ .compatible = "ti,bq27441" },
{ .compatible = "ti,bq27621" },
{ .compatible = "ti,bq27z561" },
{ .compatible = "ti,bq28z610" },
{ .compatible = "ti,bq34z100" },
{ .compatible = "ti,bq78z100" },
{},
};
MODULE_DEVICE_TABLE(of, bq27xxx_battery_i2c_of_match_table);
#endif
static struct i2c_driver bq27xxx_battery_i2c_driver = {
.driver = {
.name = "bq27xxx-battery",
.of_match_table = of_match_ptr(bq27xxx_battery_i2c_of_match_table),
},
.probe = bq27xxx_battery_i2c_probe,
.remove = bq27xxx_battery_i2c_remove,
.id_table = bq27xxx_i2c_id_table,
};
module_i2c_driver(bq27xxx_battery_i2c_driver);
MODULE_AUTHOR("Andrew F. Davis <[email protected]>");
MODULE_DESCRIPTION("BQ27xxx battery monitor i2c driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/bq27xxx_battery_i2c.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* axp288_charger.c - X-power AXP288 PMIC Charger driver
*
* Copyright (C) 2016-2017 Hans de Goede <[email protected]>
* Copyright (C) 2014 Intel Corporation
* Author: Ramakrishna Pallala <[email protected]>
*/
#include <linux/acpi.h>
#include <linux/bitops.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/regmap.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/usb/otg.h>
#include <linux/notifier.h>
#include <linux/power_supply.h>
#include <linux/property.h>
#include <linux/mfd/axp20x.h>
#include <linux/extcon.h>
#include <linux/dmi.h>
#include <asm/iosf_mbi.h>
#define PS_STAT_VBUS_TRIGGER BIT(0)
#define PS_STAT_BAT_CHRG_DIR BIT(2)
#define PS_STAT_VBAT_ABOVE_VHOLD BIT(3)
#define PS_STAT_VBUS_VALID BIT(4)
#define PS_STAT_VBUS_PRESENT BIT(5)
#define CHRG_STAT_BAT_SAFE_MODE BIT(3)
#define CHRG_STAT_BAT_VALID BIT(4)
#define CHRG_STAT_BAT_PRESENT BIT(5)
#define CHRG_STAT_CHARGING BIT(6)
#define CHRG_STAT_PMIC_OTP BIT(7)
#define VBUS_ISPOUT_CUR_LIM_MASK 0x03
#define VBUS_ISPOUT_CUR_LIM_BIT_POS 0
#define VBUS_ISPOUT_CUR_LIM_900MA 0x0 /* 900mA */
#define VBUS_ISPOUT_CUR_LIM_1500MA 0x1 /* 1500mA */
#define VBUS_ISPOUT_CUR_LIM_2000MA 0x2 /* 2000mA */
#define VBUS_ISPOUT_CUR_NO_LIM 0x3 /* 2500mA */
#define VBUS_ISPOUT_VHOLD_SET_MASK 0x38
#define VBUS_ISPOUT_VHOLD_SET_BIT_POS 0x3
#define VBUS_ISPOUT_VHOLD_SET_OFFSET 4000 /* 4000mV */
#define VBUS_ISPOUT_VHOLD_SET_LSB_RES 100 /* 100mV */
#define VBUS_ISPOUT_VHOLD_SET_4400MV 0x4 /* 4400mV */
#define VBUS_ISPOUT_VBUS_PATH_DIS BIT(7)
#define CHRG_CCCV_CC_MASK 0xf /* 4 bits */
#define CHRG_CCCV_CC_BIT_POS 0
#define CHRG_CCCV_CC_OFFSET 200 /* 200mA */
#define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */
#define CHRG_CCCV_ITERM_20P BIT(4) /* 20% of CC */
#define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */
#define CHRG_CCCV_CV_BIT_POS 5
#define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */
#define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */
#define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */
#define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */
#define CHRG_CCCV_CHG_EN BIT(7)
#define CNTL2_CC_TIMEOUT_MASK 0x3 /* 2 bits */
#define CNTL2_CC_TIMEOUT_OFFSET 6 /* 6 Hrs */
#define CNTL2_CC_TIMEOUT_LSB_RES 2 /* 2 Hrs */
#define CNTL2_CC_TIMEOUT_12HRS 0x3 /* 12 Hrs */
#define CNTL2_CHGLED_TYPEB BIT(4)
#define CNTL2_CHG_OUT_TURNON BIT(5)
#define CNTL2_PC_TIMEOUT_MASK 0xC0
#define CNTL2_PC_TIMEOUT_OFFSET 40 /* 40 mins */
#define CNTL2_PC_TIMEOUT_LSB_RES 10 /* 10 mins */
#define CNTL2_PC_TIMEOUT_70MINS 0x3
#define CHRG_ILIM_TEMP_LOOP_EN BIT(3)
#define CHRG_VBUS_ILIM_MASK 0xf0
#define CHRG_VBUS_ILIM_BIT_POS 4
#define CHRG_VBUS_ILIM_100MA 0x0 /* 100mA */
#define CHRG_VBUS_ILIM_500MA 0x1 /* 500mA */
#define CHRG_VBUS_ILIM_900MA 0x2 /* 900mA */
#define CHRG_VBUS_ILIM_1500MA 0x3 /* 1500mA */
#define CHRG_VBUS_ILIM_2000MA 0x4 /* 2000mA */
#define CHRG_VBUS_ILIM_2500MA 0x5 /* 2500mA */
#define CHRG_VBUS_ILIM_3000MA 0x6 /* 3000mA */
#define CHRG_VBUS_ILIM_3500MA 0x7 /* 3500mA */
#define CHRG_VBUS_ILIM_4000MA 0x8 /* 4000mA */
#define CHRG_VLTFC_0C 0xA5 /* 0 DegC */
#define CHRG_VHTFC_45C 0x1F /* 45 DegC */
#define FG_CNTL_OCV_ADJ_EN BIT(3)
#define CV_4100MV 4100 /* 4100mV */
#define CV_4150MV 4150 /* 4150mV */
#define CV_4200MV 4200 /* 4200mV */
#define CV_4350MV 4350 /* 4350mV */
#define AXP288_REG_UPDATE_INTERVAL (60 * HZ)
#define AXP288_EXTCON_DEV_NAME "axp288_extcon"
#define USB_HOST_EXTCON_HID "INT3496"
#define USB_HOST_EXTCON_NAME "INT3496:00"
enum {
VBUS_OV_IRQ = 0,
CHARGE_DONE_IRQ,
CHARGE_CHARGING_IRQ,
BAT_SAFE_QUIT_IRQ,
BAT_SAFE_ENTER_IRQ,
QCBTU_IRQ,
CBTU_IRQ,
QCBTO_IRQ,
CBTO_IRQ,
CHRG_INTR_END,
};
struct axp288_chrg_info {
struct platform_device *pdev;
struct regmap *regmap;
struct regmap_irq_chip_data *regmap_irqc;
int irq[CHRG_INTR_END];
struct power_supply *psy_usb;
struct mutex lock;
/* OTG/Host mode */
struct {
struct work_struct work;
struct extcon_dev *cable;
struct notifier_block id_nb;
bool id_short;
} otg;
/* SDP/CDP/DCP USB charging cable notifications */
struct {
struct extcon_dev *edev;
struct notifier_block nb;
struct work_struct work;
} cable;
int cc;
int cv;
int max_cc;
int max_cv;
unsigned long last_updated;
unsigned int input_status;
unsigned int op_mode;
unsigned int backend_control;
bool valid;
};
static inline int axp288_charger_set_cc(struct axp288_chrg_info *info, int cc)
{
u8 reg_val;
int ret;
if (cc < CHRG_CCCV_CC_OFFSET)
cc = CHRG_CCCV_CC_OFFSET;
else if (cc > info->max_cc)
cc = info->max_cc;
reg_val = (cc - CHRG_CCCV_CC_OFFSET) / CHRG_CCCV_CC_LSB_RES;
cc = (reg_val * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET;
reg_val = reg_val << CHRG_CCCV_CC_BIT_POS;
ret = regmap_update_bits(info->regmap,
AXP20X_CHRG_CTRL1,
CHRG_CCCV_CC_MASK, reg_val);
if (ret >= 0)
info->cc = cc;
return ret;
}
static inline int axp288_charger_set_cv(struct axp288_chrg_info *info, int cv)
{
u8 reg_val;
int ret;
if (cv <= CV_4100MV) {
reg_val = CHRG_CCCV_CV_4100MV;
cv = CV_4100MV;
} else if (cv <= CV_4150MV) {
reg_val = CHRG_CCCV_CV_4150MV;
cv = CV_4150MV;
} else if (cv <= CV_4200MV) {
reg_val = CHRG_CCCV_CV_4200MV;
cv = CV_4200MV;
} else {
reg_val = CHRG_CCCV_CV_4350MV;
cv = CV_4350MV;
}
reg_val = reg_val << CHRG_CCCV_CV_BIT_POS;
ret = regmap_update_bits(info->regmap,
AXP20X_CHRG_CTRL1,
CHRG_CCCV_CV_MASK, reg_val);
if (ret >= 0)
info->cv = cv;
return ret;
}
static int axp288_charger_get_vbus_inlmt(struct axp288_chrg_info *info)
{
unsigned int val;
val = info->backend_control;
val >>= CHRG_VBUS_ILIM_BIT_POS;
switch (val) {
case CHRG_VBUS_ILIM_100MA:
return 100000;
case CHRG_VBUS_ILIM_500MA:
return 500000;
case CHRG_VBUS_ILIM_900MA:
return 900000;
case CHRG_VBUS_ILIM_1500MA:
return 1500000;
case CHRG_VBUS_ILIM_2000MA:
return 2000000;
case CHRG_VBUS_ILIM_2500MA:
return 2500000;
case CHRG_VBUS_ILIM_3000MA:
return 3000000;
case CHRG_VBUS_ILIM_3500MA:
return 3500000;
default:
/* All b1xxx values map to 4000 mA */
return 4000000;
}
}
static inline int axp288_charger_set_vbus_inlmt(struct axp288_chrg_info *info,
int inlmt)
{
int ret;
u8 reg_val;
if (inlmt >= 4000000)
reg_val = CHRG_VBUS_ILIM_4000MA << CHRG_VBUS_ILIM_BIT_POS;
else if (inlmt >= 3500000)
reg_val = CHRG_VBUS_ILIM_3500MA << CHRG_VBUS_ILIM_BIT_POS;
else if (inlmt >= 3000000)
reg_val = CHRG_VBUS_ILIM_3000MA << CHRG_VBUS_ILIM_BIT_POS;
else if (inlmt >= 2500000)
reg_val = CHRG_VBUS_ILIM_2500MA << CHRG_VBUS_ILIM_BIT_POS;
else if (inlmt >= 2000000)
reg_val = CHRG_VBUS_ILIM_2000MA << CHRG_VBUS_ILIM_BIT_POS;
else if (inlmt >= 1500000)
reg_val = CHRG_VBUS_ILIM_1500MA << CHRG_VBUS_ILIM_BIT_POS;
else if (inlmt >= 900000)
reg_val = CHRG_VBUS_ILIM_900MA << CHRG_VBUS_ILIM_BIT_POS;
else if (inlmt >= 500000)
reg_val = CHRG_VBUS_ILIM_500MA << CHRG_VBUS_ILIM_BIT_POS;
else
reg_val = CHRG_VBUS_ILIM_100MA << CHRG_VBUS_ILIM_BIT_POS;
ret = regmap_update_bits(info->regmap, AXP20X_CHRG_BAK_CTRL,
CHRG_VBUS_ILIM_MASK, reg_val);
if (ret < 0)
dev_err(&info->pdev->dev, "charger BAK control %d\n", ret);
return ret;
}
static int axp288_charger_vbus_path_select(struct axp288_chrg_info *info,
bool enable)
{
int ret;
if (enable)
ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,
VBUS_ISPOUT_VBUS_PATH_DIS, 0);
else
ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,
VBUS_ISPOUT_VBUS_PATH_DIS, VBUS_ISPOUT_VBUS_PATH_DIS);
if (ret < 0)
dev_err(&info->pdev->dev, "axp288 vbus path select %d\n", ret);
return ret;
}
static int axp288_charger_enable_charger(struct axp288_chrg_info *info,
bool enable)
{
int ret;
if (enable)
ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1,
CHRG_CCCV_CHG_EN, CHRG_CCCV_CHG_EN);
else
ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1,
CHRG_CCCV_CHG_EN, 0);
if (ret < 0)
dev_err(&info->pdev->dev, "axp288 enable charger %d\n", ret);
return ret;
}
static int axp288_get_charger_health(struct axp288_chrg_info *info)
{
if (!(info->input_status & PS_STAT_VBUS_PRESENT))
return POWER_SUPPLY_HEALTH_UNKNOWN;
if (!(info->input_status & PS_STAT_VBUS_VALID))
return POWER_SUPPLY_HEALTH_DEAD;
else if (info->op_mode & CHRG_STAT_PMIC_OTP)
return POWER_SUPPLY_HEALTH_OVERHEAT;
else if (info->op_mode & CHRG_STAT_BAT_SAFE_MODE)
return POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
else
return POWER_SUPPLY_HEALTH_GOOD;
}
static int axp288_charger_usb_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct axp288_chrg_info *info = power_supply_get_drvdata(psy);
int ret = 0;
int scaled_val;
mutex_lock(&info->lock);
switch (psp) {
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
scaled_val = min(val->intval, info->max_cc);
scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000);
ret = axp288_charger_set_cc(info, scaled_val);
if (ret < 0) {
dev_warn(&info->pdev->dev, "set charge current failed\n");
goto out;
}
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
scaled_val = min(val->intval, info->max_cv);
scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000);
ret = axp288_charger_set_cv(info, scaled_val);
if (ret < 0) {
dev_warn(&info->pdev->dev, "set charge voltage failed\n");
goto out;
}
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = axp288_charger_set_vbus_inlmt(info, val->intval);
if (ret < 0) {
dev_warn(&info->pdev->dev, "set input current limit failed\n");
goto out;
}
info->valid = false;
break;
default:
ret = -EINVAL;
}
out:
mutex_unlock(&info->lock);
return ret;
}
static int axp288_charger_reg_readb(struct axp288_chrg_info *info, int reg, unsigned int *ret_val)
{
int ret;
ret = regmap_read(info->regmap, reg, ret_val);
if (ret < 0) {
dev_err(&info->pdev->dev, "Error %d on reading value from register 0x%04x\n",
ret,
reg);
return ret;
}
return 0;
}
static int axp288_charger_usb_update_property(struct axp288_chrg_info *info)
{
int ret = 0;
if (info->valid && time_before(jiffies, info->last_updated + AXP288_REG_UPDATE_INTERVAL))
return 0;
dev_dbg(&info->pdev->dev, "Charger updating register values...\n");
ret = iosf_mbi_block_punit_i2c_access();
if (ret < 0)
return ret;
ret = axp288_charger_reg_readb(info, AXP20X_PWR_INPUT_STATUS, &info->input_status);
if (ret < 0)
goto out;
ret = axp288_charger_reg_readb(info, AXP20X_PWR_OP_MODE, &info->op_mode);
if (ret < 0)
goto out;
ret = axp288_charger_reg_readb(info, AXP20X_CHRG_BAK_CTRL, &info->backend_control);
if (ret < 0)
goto out;
info->last_updated = jiffies;
info->valid = true;
out:
iosf_mbi_unblock_punit_i2c_access();
return ret;
}
static int axp288_charger_usb_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct axp288_chrg_info *info = power_supply_get_drvdata(psy);
int ret;
mutex_lock(&info->lock);
ret = axp288_charger_usb_update_property(info);
if (ret < 0)
goto out;
switch (psp) {
case POWER_SUPPLY_PROP_PRESENT:
/* Check for OTG case first */
if (info->otg.id_short) {
val->intval = 0;
break;
}
val->intval = (info->input_status & PS_STAT_VBUS_PRESENT) ? 1 : 0;
break;
case POWER_SUPPLY_PROP_ONLINE:
/* Check for OTG case first */
if (info->otg.id_short) {
val->intval = 0;
break;
}
val->intval = (info->input_status & PS_STAT_VBUS_VALID) ? 1 : 0;
break;
case POWER_SUPPLY_PROP_HEALTH:
val->intval = axp288_get_charger_health(info);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
val->intval = info->cc * 1000;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
val->intval = info->max_cc * 1000;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
val->intval = info->cv * 1000;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
val->intval = info->max_cv * 1000;
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
val->intval = axp288_charger_get_vbus_inlmt(info);
break;
default:
ret = -EINVAL;
}
out:
mutex_unlock(&info->lock);
return ret;
}
static int axp288_charger_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = 1;
break;
default:
ret = 0;
}
return ret;
}
static enum power_supply_property axp288_usb_props[] = {
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_TYPE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
};
static const struct power_supply_desc axp288_charger_desc = {
.name = "axp288_charger",
.type = POWER_SUPPLY_TYPE_USB,
.properties = axp288_usb_props,
.num_properties = ARRAY_SIZE(axp288_usb_props),
.get_property = axp288_charger_usb_get_property,
.set_property = axp288_charger_usb_set_property,
.property_is_writeable = axp288_charger_property_is_writeable,
};
static irqreturn_t axp288_charger_irq_thread_handler(int irq, void *dev)
{
struct axp288_chrg_info *info = dev;
int i;
for (i = 0; i < CHRG_INTR_END; i++) {
if (info->irq[i] == irq)
break;
}
if (i >= CHRG_INTR_END) {
dev_warn(&info->pdev->dev, "spurious interrupt!!\n");
return IRQ_NONE;
}
switch (i) {
case VBUS_OV_IRQ:
dev_dbg(&info->pdev->dev, "VBUS Over Voltage INTR\n");
break;
case CHARGE_DONE_IRQ:
dev_dbg(&info->pdev->dev, "Charging Done INTR\n");
break;
case CHARGE_CHARGING_IRQ:
dev_dbg(&info->pdev->dev, "Start Charging IRQ\n");
break;
case BAT_SAFE_QUIT_IRQ:
dev_dbg(&info->pdev->dev,
"Quit Safe Mode(restart timer) Charging IRQ\n");
break;
case BAT_SAFE_ENTER_IRQ:
dev_dbg(&info->pdev->dev,
"Enter Safe Mode(timer expire) Charging IRQ\n");
break;
case QCBTU_IRQ:
dev_dbg(&info->pdev->dev,
"Quit Battery Under Temperature(CHRG) INTR\n");
break;
case CBTU_IRQ:
dev_dbg(&info->pdev->dev,
"Hit Battery Under Temperature(CHRG) INTR\n");
break;
case QCBTO_IRQ:
dev_dbg(&info->pdev->dev,
"Quit Battery Over Temperature(CHRG) INTR\n");
break;
case CBTO_IRQ:
dev_dbg(&info->pdev->dev,
"Hit Battery Over Temperature(CHRG) INTR\n");
break;
default:
dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n");
goto out;
}
mutex_lock(&info->lock);
info->valid = false;
mutex_unlock(&info->lock);
power_supply_changed(info->psy_usb);
out:
return IRQ_HANDLED;
}
/*
* The HP Pavilion x2 10 series comes in a number of variants:
* Bay Trail SoC + AXP288 PMIC, Micro-USB, DMI_BOARD_NAME: "8021"
* Bay Trail SoC + AXP288 PMIC, Type-C, DMI_BOARD_NAME: "815D"
* Cherry Trail SoC + AXP288 PMIC, Type-C, DMI_BOARD_NAME: "813E"
* Cherry Trail SoC + TI PMIC, Type-C, DMI_BOARD_NAME: "827C" or "82F4"
*
* The variants with the AXP288 + Type-C connector are all kinds of special:
*
* 1. They use a Type-C connector which the AXP288 does not support, so when
* using a Type-C charger it is not recognized. Unlike most AXP288 devices,
* this model actually has mostly working ACPI AC / Battery code, the ACPI code
* "solves" this by simply setting the input_current_limit to 3A.
* There are still some issues with the ACPI code, so we use this native driver,
* and to solve the charging not working (500mA is not enough) issue we hardcode
* the 3A input_current_limit like the ACPI code does.
*
* 2. If no charger is connected the machine boots with the vbus-path disabled.
* Normally this is done when a 5V boost converter is active to avoid the PMIC
* trying to charge from the 5V boost converter's output. This is done when
* an OTG host cable is inserted and the ID pin on the micro-B receptacle is
* pulled low and the ID pin has an ACPI event handler associated with it
* which re-enables the vbus-path when the ID pin is pulled high when the
* OTG host cable is removed. The Type-C connector has no ID pin, there is
* no ID pin handler and there appears to be no 5V boost converter, so we
* end up not charging because the vbus-path is disabled, until we unplug
* the charger which automatically clears the vbus-path disable bit and then
* on the second plug-in of the adapter we start charging. To solve the not
* charging on first charger plugin we unconditionally enable the vbus-path at
* probe on this model, which is safe since there is no 5V boost converter.
*/
static const struct dmi_system_id axp288_hp_x2_dmi_ids[] = {
{
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "815D"),
},
},
{
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "HP"),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "813E"),
},
},
{} /* Terminating entry */
};
static void axp288_charger_extcon_evt_worker(struct work_struct *work)
{
struct axp288_chrg_info *info =
container_of(work, struct axp288_chrg_info, cable.work);
int ret, current_limit;
struct extcon_dev *edev = info->cable.edev;
unsigned int val;
ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
if (ret < 0) {
dev_err(&info->pdev->dev, "Error reading status (%d)\n", ret);
return;
}
/* Offline? Disable charging and bail */
if (!(val & PS_STAT_VBUS_VALID)) {
dev_dbg(&info->pdev->dev, "USB charger disconnected\n");
axp288_charger_enable_charger(info, false);
mutex_lock(&info->lock);
info->valid = false;
mutex_unlock(&info->lock);
power_supply_changed(info->psy_usb);
return;
}
/* Determine cable/charger type */
if (dmi_check_system(axp288_hp_x2_dmi_ids)) {
/* See comment above axp288_hp_x2_dmi_ids declaration */
dev_dbg(&info->pdev->dev, "HP X2 with Type-C, setting inlmt to 3A\n");
current_limit = 3000000;
} else if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) {
dev_dbg(&info->pdev->dev, "USB SDP charger is connected\n");
current_limit = 500000;
} else if (extcon_get_state(edev, EXTCON_CHG_USB_CDP) > 0) {
dev_dbg(&info->pdev->dev, "USB CDP charger is connected\n");
current_limit = 1500000;
} else if (extcon_get_state(edev, EXTCON_CHG_USB_DCP) > 0) {
dev_dbg(&info->pdev->dev, "USB DCP charger is connected\n");
current_limit = 2000000;
} else {
/* Charger type detection still in progress, bail. */
return;
}
/* Set vbus current limit first, then enable charger */
ret = axp288_charger_set_vbus_inlmt(info, current_limit);
if (ret == 0)
axp288_charger_enable_charger(info, true);
else
dev_err(&info->pdev->dev,
"error setting current limit (%d)\n", ret);
mutex_lock(&info->lock);
info->valid = false;
mutex_unlock(&info->lock);
power_supply_changed(info->psy_usb);
}
static int axp288_charger_handle_cable_evt(struct notifier_block *nb,
unsigned long event, void *param)
{
struct axp288_chrg_info *info =
container_of(nb, struct axp288_chrg_info, cable.nb);
schedule_work(&info->cable.work);
return NOTIFY_OK;
}
static void axp288_charger_otg_evt_worker(struct work_struct *work)
{
struct axp288_chrg_info *info =
container_of(work, struct axp288_chrg_info, otg.work);
struct extcon_dev *edev = info->otg.cable;
int ret, usb_host = extcon_get_state(edev, EXTCON_USB_HOST);
dev_dbg(&info->pdev->dev, "external connector USB-Host is %s\n",
usb_host ? "attached" : "detached");
/*
* Set usb_id_short flag to avoid running charger detection logic
* in case usb host.
*/
info->otg.id_short = usb_host;
/* Disable VBUS path before enabling the 5V boost */
ret = axp288_charger_vbus_path_select(info, !info->otg.id_short);
if (ret < 0)
dev_warn(&info->pdev->dev, "vbus path disable failed\n");
}
static int axp288_charger_handle_otg_evt(struct notifier_block *nb,
unsigned long event, void *param)
{
struct axp288_chrg_info *info =
container_of(nb, struct axp288_chrg_info, otg.id_nb);
schedule_work(&info->otg.work);
return NOTIFY_OK;
}
static int charger_init_hw_regs(struct axp288_chrg_info *info)
{
int ret, cc, cv;
unsigned int val;
/* Program temperature thresholds */
ret = regmap_write(info->regmap, AXP20X_V_LTF_CHRG, CHRG_VLTFC_0C);
if (ret < 0) {
dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
AXP20X_V_LTF_CHRG, ret);
return ret;
}
ret = regmap_write(info->regmap, AXP20X_V_HTF_CHRG, CHRG_VHTFC_45C);
if (ret < 0) {
dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
AXP20X_V_HTF_CHRG, ret);
return ret;
}
/* Do not turn-off charger o/p after charge cycle ends */
ret = regmap_update_bits(info->regmap,
AXP20X_CHRG_CTRL2,
CNTL2_CHG_OUT_TURNON, CNTL2_CHG_OUT_TURNON);
if (ret < 0) {
dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
AXP20X_CHRG_CTRL2, ret);
return ret;
}
/* Setup ending condition for charging to be 10% of I(chrg) */
ret = regmap_update_bits(info->regmap,
AXP20X_CHRG_CTRL1,
CHRG_CCCV_ITERM_20P, 0);
if (ret < 0) {
dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
AXP20X_CHRG_CTRL1, ret);
return ret;
}
/* Disable OCV-SOC curve calibration */
ret = regmap_update_bits(info->regmap,
AXP20X_CC_CTRL,
FG_CNTL_OCV_ADJ_EN, 0);
if (ret < 0) {
dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
AXP20X_CC_CTRL, ret);
return ret;
}
if (dmi_check_system(axp288_hp_x2_dmi_ids)) {
/* See comment above axp288_hp_x2_dmi_ids declaration */
ret = axp288_charger_vbus_path_select(info, true);
if (ret < 0)
return ret;
} else {
/* Set Vhold to the factory default / recommended 4.4V */
val = VBUS_ISPOUT_VHOLD_SET_4400MV << VBUS_ISPOUT_VHOLD_SET_BIT_POS;
ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,
VBUS_ISPOUT_VHOLD_SET_MASK, val);
if (ret < 0) {
dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
AXP20X_VBUS_IPSOUT_MGMT, ret);
return ret;
}
}
/* Read current charge voltage and current limit */
ret = regmap_read(info->regmap, AXP20X_CHRG_CTRL1, &val);
if (ret < 0) {
dev_err(&info->pdev->dev, "register(%x) read error(%d)\n",
AXP20X_CHRG_CTRL1, ret);
return ret;
}
/* Determine charge voltage */
cv = (val & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS;
switch (cv) {
case CHRG_CCCV_CV_4100MV:
info->cv = CV_4100MV;
break;
case CHRG_CCCV_CV_4150MV:
info->cv = CV_4150MV;
break;
case CHRG_CCCV_CV_4200MV:
info->cv = CV_4200MV;
break;
case CHRG_CCCV_CV_4350MV:
info->cv = CV_4350MV;
break;
}
/* Determine charge current limit */
cc = (val & CHRG_CCCV_CC_MASK) >> CHRG_CCCV_CC_BIT_POS;
cc = (cc * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET;
info->cc = cc;
/*
* Do not allow the user to configure higher settings then those
* set by the firmware
*/
info->max_cv = info->cv;
info->max_cc = info->cc;
return 0;
}
static void axp288_charger_cancel_work(void *data)
{
struct axp288_chrg_info *info = data;
cancel_work_sync(&info->otg.work);
cancel_work_sync(&info->cable.work);
}
static int axp288_charger_probe(struct platform_device *pdev)
{
int ret, i, pirq;
struct axp288_chrg_info *info;
struct device *dev = &pdev->dev;
struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
struct power_supply_config charger_cfg = {};
const char *extcon_name = NULL;
unsigned int val;
/*
* Normally the native AXP288 fg/charger drivers are preferred but
* on some devices the ACPI drivers should be used instead.
*/
if (!acpi_quirk_skip_acpi_ac_and_battery())
return -ENODEV;
/*
* On some devices the fuelgauge and charger parts of the axp288 are
* not used, check that the fuelgauge is enabled (CC_CTRL != 0).
*/
ret = regmap_read(axp20x->regmap, AXP20X_CC_CTRL, &val);
if (ret < 0)
return ret;
if (val == 0)
return -ENODEV;
info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
mutex_init(&info->lock);
info->pdev = pdev;
info->regmap = axp20x->regmap;
info->regmap_irqc = axp20x->regmap_irqc;
info->cable.edev = extcon_get_extcon_dev(AXP288_EXTCON_DEV_NAME);
if (IS_ERR(info->cable.edev)) {
dev_err_probe(dev, PTR_ERR(info->cable.edev),
"extcon_get_extcon_dev(%s) failed\n",
AXP288_EXTCON_DEV_NAME);
return PTR_ERR(info->cable.edev);
}
/*
* On devices with broken ACPI GPIO event handlers there also is no ACPI
* "INT3496" (USB_HOST_EXTCON_HID) device. x86-android-tablets.ko
* instantiates an "intel-int3496" extcon on these devs as a workaround.
*/
if (acpi_quirk_skip_gpio_event_handlers())
extcon_name = "intel-int3496";
else if (acpi_dev_present(USB_HOST_EXTCON_HID, NULL, -1))
extcon_name = USB_HOST_EXTCON_NAME;
if (extcon_name) {
info->otg.cable = extcon_get_extcon_dev(extcon_name);
if (IS_ERR(info->otg.cable)) {
dev_err_probe(dev, PTR_ERR(info->otg.cable),
"extcon_get_extcon_dev(%s) failed\n",
USB_HOST_EXTCON_NAME);
return PTR_ERR(info->otg.cable);
}
dev_info(dev, "Using " USB_HOST_EXTCON_HID " extcon for usb-id\n");
}
platform_set_drvdata(pdev, info);
ret = charger_init_hw_regs(info);
if (ret)
return ret;
/* Register with power supply class */
charger_cfg.drv_data = info;
info->psy_usb = devm_power_supply_register(dev, &axp288_charger_desc,
&charger_cfg);
if (IS_ERR(info->psy_usb)) {
ret = PTR_ERR(info->psy_usb);
dev_err(dev, "failed to register power supply: %d\n", ret);
return ret;
}
/* Cancel our work on cleanup, register this before the notifiers */
ret = devm_add_action(dev, axp288_charger_cancel_work, info);
if (ret)
return ret;
/* Register for extcon notification */
INIT_WORK(&info->cable.work, axp288_charger_extcon_evt_worker);
info->cable.nb.notifier_call = axp288_charger_handle_cable_evt;
ret = devm_extcon_register_notifier_all(dev, info->cable.edev,
&info->cable.nb);
if (ret) {
dev_err(dev, "failed to register cable extcon notifier\n");
return ret;
}
schedule_work(&info->cable.work);
/* Register for OTG notification */
INIT_WORK(&info->otg.work, axp288_charger_otg_evt_worker);
info->otg.id_nb.notifier_call = axp288_charger_handle_otg_evt;
if (info->otg.cable) {
ret = devm_extcon_register_notifier(dev, info->otg.cable,
EXTCON_USB_HOST, &info->otg.id_nb);
if (ret) {
dev_err(dev, "failed to register EXTCON_USB_HOST notifier\n");
return ret;
}
schedule_work(&info->otg.work);
}
/* Register charger interrupts */
for (i = 0; i < CHRG_INTR_END; i++) {
pirq = platform_get_irq(info->pdev, i);
if (pirq < 0)
return pirq;
info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
if (info->irq[i] < 0) {
dev_warn(&info->pdev->dev,
"failed to get virtual interrupt=%d\n", pirq);
return info->irq[i];
}
ret = devm_request_threaded_irq(&info->pdev->dev, info->irq[i],
NULL, axp288_charger_irq_thread_handler,
IRQF_ONESHOT, info->pdev->name, info);
if (ret) {
dev_err(dev, "failed to request interrupt=%d\n",
info->irq[i]);
return ret;
}
}
return 0;
}
static const struct platform_device_id axp288_charger_id_table[] = {
{ .name = "axp288_charger" },
{},
};
MODULE_DEVICE_TABLE(platform, axp288_charger_id_table);
static struct platform_driver axp288_charger_driver = {
.probe = axp288_charger_probe,
.id_table = axp288_charger_id_table,
.driver = {
.name = "axp288_charger",
},
};
module_platform_driver(axp288_charger_driver);
MODULE_AUTHOR("Ramakrishna Pallala <[email protected]>");
MODULE_DESCRIPTION("X-power AXP288 Charger Driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/power/supply/axp288_charger.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for Analog Devices (Linear Technology) LTC4162-L charger IC.
* Copyright (C) 2020, Topic Embedded Products
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/pm_runtime.h>
#include <linux/power_supply.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
/* Registers (names based on what datasheet uses) */
#define LTC4162L_EN_LIMIT_ALERTS_REG 0x0D
#define LTC4162L_EN_CHARGER_STATE_ALERTS_REG 0x0E
#define LTC4162L_EN_CHARGE_STATUS_ALERTS_REG 0x0F
#define LTC4162L_CONFIG_BITS_REG 0x14
#define LTC4162L_IIN_LIMIT_TARGET 0x15
#define LTC4162L_ARM_SHIP_MODE 0x19
#define LTC4162L_CHARGE_CURRENT_SETTING 0X1A
#define LTC4162L_VCHARGE_SETTING 0X1B
#define LTC4162L_C_OVER_X_THRESHOLD 0x1C
#define LTC4162L_MAX_CV_TIME 0X1D
#define LTC4162L_MAX_CHARGE_TIME 0X1E
#define LTC4162L_CHARGER_CONFIG_BITS 0x29
#define LTC4162L_CHARGER_STATE 0x34
#define LTC4162L_CHARGE_STATUS 0x35
#define LTC4162L_LIMIT_ALERTS_REG 0x36
#define LTC4162L_CHARGER_STATE_ALERTS_REG 0x37
#define LTC4162L_CHARGE_STATUS_ALERTS_REG 0x38
#define LTC4162L_SYSTEM_STATUS_REG 0x39
#define LTC4162L_VBAT 0x3A
#define LTC4162L_VIN 0x3B
#define LTC4162L_VOUT 0x3C
#define LTC4162L_IBAT 0x3D
#define LTC4162L_IIN 0x3E
#define LTC4162L_DIE_TEMPERATURE 0x3F
#define LTC4162L_THERMISTOR_VOLTAGE 0x40
#define LTC4162L_BSR 0x41
#define LTC4162L_JEITA_REGION 0x42
#define LTC4162L_CHEM_CELLS_REG 0x43
#define LTC4162L_ICHARGE_DAC 0x44
#define LTC4162L_VCHARGE_DAC 0x45
#define LTC4162L_IIN_LIMIT_DAC 0x46
#define LTC4162L_VBAT_FILT 0x47
#define LTC4162L_INPUT_UNDERVOLTAGE_DAC 0x4B
/* Enumeration as in datasheet. Individual bits are mutually exclusive. */
enum ltc4162l_state {
battery_detection = 2048,
charger_suspended = 256,
precharge = 128, /* trickle on low bat voltage */
cc_cv_charge = 64, /* normal charge */
ntc_pause = 32,
timer_term = 16,
c_over_x_term = 8, /* battery is full */
max_charge_time_fault = 4,
bat_missing_fault = 2,
bat_short_fault = 1
};
/* Individual bits are mutually exclusive. Only active in charging states.*/
enum ltc4162l_charge_status {
ilim_reg_active = 32,
thermal_reg_active = 16,
vin_uvcl_active = 8,
iin_limit_active = 4,
constant_current = 2,
constant_voltage = 1,
charger_off = 0
};
/* Magic number to write to ARM_SHIP_MODE register */
#define LTC4162L_ARM_SHIP_MODE_MAGIC 21325
struct ltc4162l_info {
struct i2c_client *client;
struct regmap *regmap;
struct power_supply *charger;
u32 rsnsb; /* Series resistor that sets charge current, microOhm */
u32 rsnsi; /* Series resistor to measure input current, microOhm */
u8 cell_count; /* Number of connected cells, 0 while unknown */
};
static u8 ltc4162l_get_cell_count(struct ltc4162l_info *info)
{
int ret;
unsigned int val;
/* Once read successfully */
if (info->cell_count)
return info->cell_count;
ret = regmap_read(info->regmap, LTC4162L_CHEM_CELLS_REG, &val);
if (ret)
return 0;
/* Lower 4 bits is the cell count, or 0 if the chip doesn't know yet */
val &= 0x0f;
if (!val)
return 0;
/* Once determined, keep the value */
info->cell_count = val;
return val;
};
/* Convert enum value to POWER_SUPPLY_STATUS value */
static int ltc4162l_state_decode(enum ltc4162l_state value)
{
switch (value) {
case precharge:
case cc_cv_charge:
return POWER_SUPPLY_STATUS_CHARGING;
case c_over_x_term:
return POWER_SUPPLY_STATUS_FULL;
case bat_missing_fault:
case bat_short_fault:
return POWER_SUPPLY_STATUS_UNKNOWN;
default:
return POWER_SUPPLY_STATUS_NOT_CHARGING;
}
};
static int ltc4162l_get_status(struct ltc4162l_info *info,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(info->regmap, LTC4162L_CHARGER_STATE, ®val);
if (ret) {
dev_err(&info->client->dev, "Failed to read CHARGER_STATE\n");
return ret;
}
val->intval = ltc4162l_state_decode(regval);
return 0;
}
static int ltc4162l_charge_status_decode(enum ltc4162l_charge_status value)
{
if (!value)
return POWER_SUPPLY_CHARGE_TYPE_NONE;
/* constant voltage/current and input_current limit are "fast" modes */
if (value <= iin_limit_active)
return POWER_SUPPLY_CHARGE_TYPE_FAST;
/* Anything that's not fast we'll return as trickle */
return POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
}
static int ltc4162l_get_charge_type(struct ltc4162l_info *info,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(info->regmap, LTC4162L_CHARGE_STATUS, ®val);
if (ret)
return ret;
val->intval = ltc4162l_charge_status_decode(regval);
return 0;
}
static int ltc4162l_state_to_health(enum ltc4162l_state value)
{
switch (value) {
case ntc_pause:
return POWER_SUPPLY_HEALTH_OVERHEAT;
case timer_term:
return POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
case max_charge_time_fault:
return POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE;
case bat_missing_fault:
return POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
case bat_short_fault:
return POWER_SUPPLY_HEALTH_DEAD;
default:
return POWER_SUPPLY_HEALTH_GOOD;
}
}
static int ltc4162l_get_health(struct ltc4162l_info *info,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(info->regmap, LTC4162L_CHARGER_STATE, ®val);
if (ret)
return ret;
val->intval = ltc4162l_state_to_health(regval);
return 0;
}
static int ltc4162l_get_online(struct ltc4162l_info *info,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(info->regmap, LTC4162L_SYSTEM_STATUS_REG, ®val);
if (ret)
return ret;
/* BIT(2) indicates if input voltage is sufficient to charge */
val->intval = !!(regval & BIT(2));
return 0;
}
static int ltc4162l_get_vbat(struct ltc4162l_info *info,
unsigned int reg,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(info->regmap, reg, ®val);
if (ret)
return ret;
/* cell_count × 192.4μV/LSB */
regval *= 1924;
regval *= ltc4162l_get_cell_count(info);
regval /= 10;
val->intval = regval;
return 0;
}
static int ltc4162l_get_ibat(struct ltc4162l_info *info,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(info->regmap, LTC4162L_IBAT, ®val);
if (ret)
return ret;
/* Signed 16-bit number, 1.466μV / RSNSB amperes/LSB. */
ret = (s16)(regval & 0xFFFF);
val->intval = 100 * mult_frac(ret, 14660, (int)info->rsnsb);
return 0;
}
static int ltc4162l_get_input_voltage(struct ltc4162l_info *info,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(info->regmap, LTC4162L_VIN, ®val);
if (ret)
return ret;
/* 1.649mV/LSB */
val->intval = regval * 1694;
return 0;
}
static int ltc4162l_get_input_current(struct ltc4162l_info *info,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(info->regmap, LTC4162L_IIN, ®val);
if (ret)
return ret;
/* Signed 16-bit number, 1.466μV / RSNSI amperes/LSB. */
ret = (s16)(regval & 0xFFFF);
ret *= 14660;
ret /= info->rsnsi;
ret *= 100;
val->intval = ret;
return 0;
}
static int ltc4162l_get_icharge(struct ltc4162l_info *info,
unsigned int reg,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(info->regmap, reg, ®val);
if (ret)
return ret;
regval &= BIT(6) - 1; /* Only the lower 5 bits */
/* The charge current servo level: (icharge_dac + 1) × 1mV/RSNSB */
++regval;
val->intval = 10000u * mult_frac(regval, 100000u, info->rsnsb);
return 0;
}
static int ltc4162l_set_icharge(struct ltc4162l_info *info,
unsigned int reg,
unsigned int value)
{
value = mult_frac(value, info->rsnsb, 100000u);
value /= 10000u;
/* Round to lowest possible */
if (value)
--value;
if (value > 31)
return -EINVAL;
return regmap_write(info->regmap, reg, value);
}
static int ltc4162l_get_vcharge(struct ltc4162l_info *info,
unsigned int reg,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
u32 voltage;
ret = regmap_read(info->regmap, reg, ®val);
if (ret)
return ret;
regval &= BIT(6) - 1; /* Only the lower 5 bits */
/*
* charge voltage setting can be computed from
* cell_count × (vcharge_setting × 12.5mV + 3.8125V)
* where vcharge_setting ranges from 0 to 31 (4.2V max).
*/
voltage = 3812500 + (regval * 12500);
voltage *= ltc4162l_get_cell_count(info);
val->intval = voltage;
return 0;
}
static int ltc4162l_set_vcharge(struct ltc4162l_info *info,
unsigned int reg,
unsigned int value)
{
u8 cell_count = ltc4162l_get_cell_count(info);
if (!cell_count)
return -EBUSY; /* Not available yet, try again later */
value /= cell_count;
if (value < 3812500)
return -EINVAL;
value -= 3812500;
value /= 12500;
if (value > 31)
return -EINVAL;
return regmap_write(info->regmap, reg, value);
}
static int ltc4162l_get_iin_limit_dac(struct ltc4162l_info *info,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(info->regmap, LTC4162L_IIN_LIMIT_DAC, ®val);
if (ret)
return ret;
regval &= BIT(6) - 1; /* Only 6 bits */
/* (iin_limit_dac + 1) × 500μV / RSNSI */
++regval;
regval *= 5000000u;
regval /= info->rsnsi;
val->intval = 100u * regval;
return 0;
}
static int ltc4162l_set_iin_limit(struct ltc4162l_info *info,
unsigned int value)
{
unsigned int regval;
regval = mult_frac(value, info->rsnsi, 50000u);
regval /= 10000u;
if (regval)
--regval;
if (regval > 63)
regval = 63;
return regmap_write(info->regmap, LTC4162L_IIN_LIMIT_TARGET, regval);
}
static int ltc4162l_get_die_temp(struct ltc4162l_info *info,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(info->regmap, LTC4162L_DIE_TEMPERATURE, ®val);
if (ret)
return ret;
/* die_temp × 0.0215°C/LSB - 264.4°C */
ret = (s16)(regval & 0xFFFF);
ret *= 215;
ret /= 100; /* Centidegrees scale */
ret -= 26440;
val->intval = ret;
return 0;
}
static int ltc4162l_get_term_current(struct ltc4162l_info *info,
union power_supply_propval *val)
{
unsigned int regval;
int ret;
ret = regmap_read(info->regmap, LTC4162L_CHARGER_CONFIG_BITS, ®val);
if (ret)
return ret;
/* Check if C_OVER_X_THRESHOLD is enabled */
if (!(regval & BIT(2))) {
val->intval = 0;
return 0;
}
ret = regmap_read(info->regmap, LTC4162L_C_OVER_X_THRESHOLD, ®val);
if (ret)
return ret;
/* 1.466μV / RSNSB amperes/LSB */
regval *= 14660u;
regval /= info->rsnsb;
val->intval = 100 * regval;
return 0;
}
static int ltc4162l_set_term_current(struct ltc4162l_info *info,
unsigned int value)
{
int ret;
unsigned int regval;
if (!value) {
/* Disable en_c_over_x_term when set to zero */
return regmap_update_bits(info->regmap,
LTC4162L_CHARGER_CONFIG_BITS,
BIT(2), 0);
}
regval = mult_frac(value, info->rsnsb, 14660u);
regval /= 100u;
ret = regmap_write(info->regmap, LTC4162L_C_OVER_X_THRESHOLD, regval);
if (ret)
return ret;
/* Set en_c_over_x_term after changing the threshold value */
return regmap_update_bits(info->regmap, LTC4162L_CHARGER_CONFIG_BITS,
BIT(2), BIT(2));
}
/* Custom properties */
static const char * const ltc4162l_charge_status_name[] = {
"ilim_reg_active", /* 32 */
"thermal_reg_active",
"vin_uvcl_active",
"iin_limit_active",
"constant_current",
"constant_voltage",
"charger_off" /* 0 */
};
static ssize_t charge_status_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct power_supply *psy = to_power_supply(dev);
struct ltc4162l_info *info = power_supply_get_drvdata(psy);
const char *result = ltc4162l_charge_status_name[
ARRAY_SIZE(ltc4162l_charge_status_name) - 1];
unsigned int regval;
unsigned int mask;
unsigned int index;
int ret;
ret = regmap_read(info->regmap, LTC4162L_CHARGE_STATUS, ®val);
if (ret)
return ret;
/* Only one bit is set according to datasheet, let's be safe here */
for (mask = 32, index = 0; mask != 0; mask >>= 1, ++index) {
if (regval & mask) {
result = ltc4162l_charge_status_name[index];
break;
}
}
return sysfs_emit(buf, "%s\n", result);
}
static DEVICE_ATTR_RO(charge_status);
static ssize_t vbat_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct power_supply *psy = to_power_supply(dev);
struct ltc4162l_info *info = power_supply_get_drvdata(psy);
union power_supply_propval val;
int ret;
ret = ltc4162l_get_vbat(info, LTC4162L_VBAT, &val);
if (ret)
return ret;
return sysfs_emit(buf, "%d\n", val.intval);
}
static DEVICE_ATTR_RO(vbat);
static ssize_t vbat_avg_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct power_supply *psy = to_power_supply(dev);
struct ltc4162l_info *info = power_supply_get_drvdata(psy);
union power_supply_propval val;
int ret;
ret = ltc4162l_get_vbat(info, LTC4162L_VBAT_FILT, &val);
if (ret)
return ret;
return sysfs_emit(buf, "%d\n", val.intval);
}
static DEVICE_ATTR_RO(vbat_avg);
static ssize_t ibat_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct power_supply *psy = to_power_supply(dev);
struct ltc4162l_info *info = power_supply_get_drvdata(psy);
union power_supply_propval val;
int ret;
ret = ltc4162l_get_ibat(info, &val);
if (ret)
return ret;
return sysfs_emit(buf, "%d\n", val.intval);
}
static DEVICE_ATTR_RO(ibat);
static ssize_t force_telemetry_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct power_supply *psy = to_power_supply(dev);
struct ltc4162l_info *info = power_supply_get_drvdata(psy);
unsigned int regval;
int ret;
ret = regmap_read(info->regmap, LTC4162L_CONFIG_BITS_REG, ®val);
if (ret)
return ret;
return sysfs_emit(buf, "%u\n", regval & BIT(2) ? 1 : 0);
}
static ssize_t force_telemetry_store(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
struct power_supply *psy = to_power_supply(dev);
struct ltc4162l_info *info = power_supply_get_drvdata(psy);
int ret;
unsigned int value;
ret = kstrtouint(buf, 0, &value);
if (ret < 0)
return ret;
ret = regmap_update_bits(info->regmap, LTC4162L_CONFIG_BITS_REG,
BIT(2), value ? BIT(2) : 0);
if (ret < 0)
return ret;
return count;
}
static DEVICE_ATTR_RW(force_telemetry);
static ssize_t arm_ship_mode_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct power_supply *psy = to_power_supply(dev);
struct ltc4162l_info *info = power_supply_get_drvdata(psy);
unsigned int regval;
int ret;
ret = regmap_read(info->regmap, LTC4162L_ARM_SHIP_MODE, ®val);
if (ret)
return ret;
return sysfs_emit(buf, "%u\n",
regval == LTC4162L_ARM_SHIP_MODE_MAGIC ? 1 : 0);
}
static ssize_t arm_ship_mode_store(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
struct power_supply *psy = to_power_supply(dev);
struct ltc4162l_info *info = power_supply_get_drvdata(psy);
int ret;
unsigned int value;
ret = kstrtouint(buf, 0, &value);
if (ret < 0)
return ret;
ret = regmap_write(info->regmap, LTC4162L_ARM_SHIP_MODE,
value ? LTC4162L_ARM_SHIP_MODE_MAGIC : 0);
if (ret < 0)
return ret;
return count;
}
static DEVICE_ATTR_RW(arm_ship_mode);
static struct attribute *ltc4162l_sysfs_entries[] = {
&dev_attr_charge_status.attr,
&dev_attr_ibat.attr,
&dev_attr_vbat.attr,
&dev_attr_vbat_avg.attr,
&dev_attr_force_telemetry.attr,
&dev_attr_arm_ship_mode.attr,
NULL,
};
static const struct attribute_group ltc4162l_attr_group = {
.name = NULL, /* put in device directory */
.attrs = ltc4162l_sysfs_entries,
};
static const struct attribute_group *ltc4162l_attr_groups[] = {
<c4162l_attr_group,
NULL,
};
static int ltc4162l_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct ltc4162l_info *info = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
return ltc4162l_get_status(info, val);
case POWER_SUPPLY_PROP_CHARGE_TYPE:
return ltc4162l_get_charge_type(info, val);
case POWER_SUPPLY_PROP_HEALTH:
return ltc4162l_get_health(info, val);
case POWER_SUPPLY_PROP_ONLINE:
return ltc4162l_get_online(info, val);
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
return ltc4162l_get_input_voltage(info, val);
case POWER_SUPPLY_PROP_CURRENT_NOW:
return ltc4162l_get_input_current(info, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
return ltc4162l_get_icharge(info,
LTC4162L_ICHARGE_DAC, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
return ltc4162l_get_icharge(info,
LTC4162L_CHARGE_CURRENT_SETTING, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
return ltc4162l_get_vcharge(info,
LTC4162L_VCHARGE_DAC, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
return ltc4162l_get_vcharge(info,
LTC4162L_VCHARGE_SETTING, val);
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return ltc4162l_get_iin_limit_dac(info, val);
case POWER_SUPPLY_PROP_TEMP:
return ltc4162l_get_die_temp(info, val);
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return ltc4162l_get_term_current(info, val);
default:
return -EINVAL;
}
}
static int ltc4162l_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct ltc4162l_info *info = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
return ltc4162l_set_icharge(info,
LTC4162L_CHARGE_CURRENT_SETTING, val->intval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
return ltc4162l_set_vcharge(info,
LTC4162L_VCHARGE_SETTING, val->intval);
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return ltc4162l_set_iin_limit(info, val->intval);
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return ltc4162l_set_term_current(info, val->intval);
default:
return -EINVAL;
}
}
static int ltc4162l_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return 1;
default:
return 0;
}
}
/* Charger power supply property routines */
static enum power_supply_property ltc4162l_properties[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
};
static const struct power_supply_desc ltc4162l_desc = {
.name = "ltc4162-l",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = ltc4162l_properties,
.num_properties = ARRAY_SIZE(ltc4162l_properties),
.get_property = ltc4162l_get_property,
.set_property = ltc4162l_set_property,
.property_is_writeable = ltc4162l_property_is_writeable,
};
static bool ltc4162l_is_writeable_reg(struct device *dev, unsigned int reg)
{
/* all registers up to this one are writeable */
if (reg <= LTC4162L_CHARGER_CONFIG_BITS)
return true;
/* The ALERTS registers can be written to clear alerts */
if (reg >= LTC4162L_LIMIT_ALERTS_REG &&
reg <= LTC4162L_CHARGE_STATUS_ALERTS_REG)
return true;
return false;
}
static bool ltc4162l_is_volatile_reg(struct device *dev, unsigned int reg)
{
/* all registers after this one are read-only status registers */
return reg > LTC4162L_CHARGER_CONFIG_BITS;
}
static const struct regmap_config ltc4162l_regmap_config = {
.reg_bits = 8,
.val_bits = 16,
.val_format_endian = REGMAP_ENDIAN_LITTLE,
.writeable_reg = ltc4162l_is_writeable_reg,
.volatile_reg = ltc4162l_is_volatile_reg,
.max_register = LTC4162L_INPUT_UNDERVOLTAGE_DAC,
.cache_type = REGCACHE_RBTREE,
};
static void ltc4162l_clear_interrupts(struct ltc4162l_info *info)
{
/* Acknowledge interrupt to chip by clearing all events */
regmap_write(info->regmap, LTC4162L_LIMIT_ALERTS_REG, 0);
regmap_write(info->regmap, LTC4162L_CHARGER_STATE_ALERTS_REG, 0);
regmap_write(info->regmap, LTC4162L_CHARGE_STATUS_ALERTS_REG, 0);
}
static int ltc4162l_probe(struct i2c_client *client)
{
struct i2c_adapter *adapter = client->adapter;
struct device *dev = &client->dev;
struct ltc4162l_info *info;
struct power_supply_config ltc4162l_config = {};
u32 value;
int ret;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
dev_err(dev, "No support for SMBUS_WORD_DATA\n");
return -ENODEV;
}
info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->client = client;
i2c_set_clientdata(client, info);
info->regmap = devm_regmap_init_i2c(client, <c4162l_regmap_config);
if (IS_ERR(info->regmap)) {
dev_err(dev, "Failed to initialize register map\n");
return PTR_ERR(info->regmap);
}
ret = device_property_read_u32(dev, "lltc,rsnsb-micro-ohms",
&info->rsnsb);
if (ret) {
dev_err(dev, "Missing lltc,rsnsb-micro-ohms property\n");
return ret;
}
if (!info->rsnsb)
return -EINVAL;
ret = device_property_read_u32(dev, "lltc,rsnsi-micro-ohms",
&info->rsnsi);
if (ret) {
dev_err(dev, "Missing lltc,rsnsi-micro-ohms property\n");
return ret;
}
if (!info->rsnsi)
return -EINVAL;
if (!device_property_read_u32(dev, "lltc,cell-count", &value))
info->cell_count = value;
ltc4162l_config.of_node = dev->of_node;
ltc4162l_config.drv_data = info;
ltc4162l_config.attr_grp = ltc4162l_attr_groups;
info->charger = devm_power_supply_register(dev, <c4162l_desc,
<c4162l_config);
if (IS_ERR(info->charger)) {
dev_err(dev, "Failed to register charger\n");
return PTR_ERR(info->charger);
}
/* Disable the threshold alerts, we're not using them */
regmap_write(info->regmap, LTC4162L_EN_LIMIT_ALERTS_REG, 0);
/* Enable interrupts on all status changes */
regmap_write(info->regmap, LTC4162L_EN_CHARGER_STATE_ALERTS_REG,
0x1fff);
regmap_write(info->regmap, LTC4162L_EN_CHARGE_STATUS_ALERTS_REG, 0x1f);
ltc4162l_clear_interrupts(info);
return 0;
}
static void ltc4162l_alert(struct i2c_client *client,
enum i2c_alert_protocol type, unsigned int flag)
{
struct ltc4162l_info *info = i2c_get_clientdata(client);
if (type != I2C_PROTOCOL_SMBUS_ALERT)
return;
ltc4162l_clear_interrupts(info);
power_supply_changed(info->charger);
}
static const struct i2c_device_id ltc4162l_i2c_id_table[] = {
{ "ltc4162-l", 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, ltc4162l_i2c_id_table);
static const struct of_device_id ltc4162l_of_match[] __maybe_unused = {
{ .compatible = "lltc,ltc4162-l", },
{ },
};
MODULE_DEVICE_TABLE(of, ltc4162l_of_match);
static struct i2c_driver ltc4162l_driver = {
.probe = ltc4162l_probe,
.alert = ltc4162l_alert,
.id_table = ltc4162l_i2c_id_table,
.driver = {
.name = "ltc4162-l-charger",
.of_match_table = of_match_ptr(ltc4162l_of_match),
},
};
module_i2c_driver(ltc4162l_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mike Looijmans <[email protected]>");
MODULE_DESCRIPTION("LTC4162-L charger driver");
| linux-master | drivers/power/supply/ltc4162-l-charger.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2022 Richtek Technology Corp.
*
* Author: ChiYuan Huang <[email protected]>
* ChiaEn Wu <[email protected]>
*/
#include <linux/bits.h>
#include <linux/bitfield.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/kstrtox.h>
#include <linux/linear_range.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/units.h>
#include <linux/sysfs.h>
#define RT9467_REG_CORE_CTRL0 0x00
#define RT9467_REG_CHG_CTRL1 0x01
#define RT9467_REG_CHG_CTRL2 0x02
#define RT9467_REG_CHG_CTRL3 0x03
#define RT9467_REG_CHG_CTRL4 0x04
#define RT9467_REG_CHG_CTRL5 0x05
#define RT9467_REG_CHG_CTRL6 0x06
#define RT9467_REG_CHG_CTRL7 0x07
#define RT9467_REG_CHG_CTRL8 0x08
#define RT9467_REG_CHG_CTRL9 0x09
#define RT9467_REG_CHG_CTRL10 0x0A
#define RT9467_REG_CHG_CTRL12 0x0C
#define RT9467_REG_CHG_CTRL13 0x0D
#define RT9467_REG_CHG_CTRL14 0x0E
#define RT9467_REG_CHG_ADC 0x11
#define RT9467_REG_CHG_DPDM1 0x12
#define RT9467_REG_CHG_DPDM2 0x13
#define RT9467_REG_DEVICE_ID 0x40
#define RT9467_REG_CHG_STAT 0x42
#define RT9467_REG_ADC_DATA_H 0x44
#define RT9467_REG_CHG_STATC 0x50
#define RT9467_REG_CHG_IRQ1 0x53
#define RT9467_REG_CHG_STATC_CTRL 0x60
#define RT9467_REG_CHG_IRQ1_CTRL 0x63
#define RT9467_MASK_PWR_RDY BIT(7)
#define RT9467_MASK_MIVR_STAT BIT(6)
#define RT9467_MASK_OTG_CSEL GENMASK(2, 0)
#define RT9467_MASK_OTG_VSEL GENMASK(7, 2)
#define RT9467_MASK_OTG_EN BIT(0)
#define RT9467_MASK_ADC_IN_SEL GENMASK(7, 4)
#define RT9467_MASK_ADC_START BIT(0)
#define RT9467_NUM_IRQ_REGS 4
#define RT9467_ICHG_MIN_uA 100000
#define RT9467_ICHG_MAX_uA 5000000
#define RT9467_CV_MAX_uV 4710000
#define RT9467_OTG_MIN_uV 4425000
#define RT9467_OTG_MAX_uV 5825000
#define RT9467_OTG_STEP_uV 25000
#define RT9467_NUM_VOTG (RT9467_OTG_MAX_uV - RT9467_OTG_MIN_uV + 1)
#define RT9467_AICLVTH_GAP_uV 200000
#define RT9467_ADCCONV_TIME_MS 35
#define RT9466_VID 0x8
#define RT9467_VID 0x9
/* IRQ number */
#define RT9467_IRQ_TS_STATC 0
#define RT9467_IRQ_CHG_FAULT 1
#define RT9467_IRQ_CHG_STATC 2
#define RT9467_IRQ_CHG_TMR 3
#define RT9467_IRQ_CHG_BATABS 4
#define RT9467_IRQ_CHG_ADPBAD 5
#define RT9467_IRQ_CHG_RVP 6
#define RT9467_IRQ_OTP 7
#define RT9467_IRQ_CHG_AICLM 8
#define RT9467_IRQ_CHG_ICHGM 9
#define RT9467_IRQ_WDTMR 11
#define RT9467_IRQ_SSFINISH 12
#define RT9467_IRQ_CHG_RECHG 13
#define RT9467_IRQ_CHG_TERM 14
#define RT9467_IRQ_CHG_IEOC 15
#define RT9467_IRQ_ADC_DONE 16
#define RT9467_IRQ_PUMPX_DONE 17
#define RT9467_IRQ_BST_BATUV 21
#define RT9467_IRQ_BST_MIDOV 22
#define RT9467_IRQ_BST_OLP 23
#define RT9467_IRQ_ATTACH 24
#define RT9467_IRQ_DETACH 25
#define RT9467_IRQ_HVDCP_DET 29
#define RT9467_IRQ_CHGDET 30
#define RT9467_IRQ_DCDT 31
enum rt9467_fields {
/* RT9467_REG_CORE_CTRL0 */
F_RST = 0,
/* RT9467_REG_CHG_CTRL1 */
F_HZ, F_OTG_PIN_EN, F_OPA_MODE,
/* RT9467_REG_CHG_CTRL2 */
F_SHIP_MODE, F_TE, F_IINLMTSEL, F_CFO_EN, F_CHG_EN,
/* RT9467_REG_CHG_CTRL3 */
F_IAICR, F_ILIM_EN,
/* RT9467_REG_CHG_CTRL4 */
F_VOREG,
/* RT9467_REG_CHG_CTRL6 */
F_VMIVR,
/* RT9467_REG_CHG_CTRL7 */
F_ICHG,
/* RT9467_REG_CHG_CTRL8 */
F_IPREC,
/* RT9467_REG_CHG_CTRL9 */
F_IEOC,
/* RT9467_REG_CHG_CTRL12 */
F_WT_FC,
/* RT9467_REG_CHG_CTRL13 */
F_OCP,
/* RT9467_REG_CHG_CTRL14 */
F_AICL_MEAS, F_AICL_VTH,
/* RT9467_REG_CHG_DPDM1 */
F_USBCHGEN,
/* RT9467_REG_CHG_DPDM2 */
F_USB_STATUS,
/* RT9467_REG_DEVICE_ID */
F_VENDOR,
/* RT9467_REG_CHG_STAT */
F_CHG_STAT,
/* RT9467_REG_CHG_STATC */
F_PWR_RDY, F_CHG_MIVR,
F_MAX_FIELDS
};
static const struct regmap_irq rt9467_irqs[] = {
REGMAP_IRQ_REG_LINE(RT9467_IRQ_TS_STATC, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_FAULT, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_STATC, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_TMR, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_BATABS, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_ADPBAD, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_RVP, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_OTP, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_AICLM, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_ICHGM, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_WDTMR, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_SSFINISH, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_RECHG, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_TERM, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHG_IEOC, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_ADC_DONE, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_PUMPX_DONE, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_BST_BATUV, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_BST_MIDOV, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_BST_OLP, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_ATTACH, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_DETACH, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_HVDCP_DET, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_CHGDET, 8),
REGMAP_IRQ_REG_LINE(RT9467_IRQ_DCDT, 8)
};
static const struct regmap_irq_chip rt9467_irq_chip = {
.name = "rt9467-irqs",
.status_base = RT9467_REG_CHG_IRQ1,
.mask_base = RT9467_REG_CHG_IRQ1_CTRL,
.num_regs = RT9467_NUM_IRQ_REGS,
.irqs = rt9467_irqs,
.num_irqs = ARRAY_SIZE(rt9467_irqs),
};
enum rt9467_ranges {
RT9467_RANGE_IAICR = 0,
RT9467_RANGE_VOREG,
RT9467_RANGE_VMIVR,
RT9467_RANGE_ICHG,
RT9467_RANGE_IPREC,
RT9467_RANGE_IEOC,
RT9467_RANGE_AICL_VTH,
RT9467_RANGES_MAX
};
static const struct linear_range rt9467_ranges[RT9467_RANGES_MAX] = {
LINEAR_RANGE_IDX(RT9467_RANGE_IAICR, 100000, 0x0, 0x3F, 50000),
LINEAR_RANGE_IDX(RT9467_RANGE_VOREG, 3900000, 0x0, 0x51, 10000),
LINEAR_RANGE_IDX(RT9467_RANGE_VMIVR, 3900000, 0x0, 0x5F, 100000),
LINEAR_RANGE_IDX(RT9467_RANGE_ICHG, 900000, 0x08, 0x31, 100000),
LINEAR_RANGE_IDX(RT9467_RANGE_IPREC, 100000, 0x0, 0x0F, 50000),
LINEAR_RANGE_IDX(RT9467_RANGE_IEOC, 100000, 0x0, 0x0F, 50000),
LINEAR_RANGE_IDX(RT9467_RANGE_AICL_VTH, 4100000, 0x0, 0x7, 100000),
};
static const struct reg_field rt9467_chg_fields[] = {
[F_RST] = REG_FIELD(RT9467_REG_CORE_CTRL0, 7, 7),
[F_HZ] = REG_FIELD(RT9467_REG_CHG_CTRL1, 2, 2),
[F_OTG_PIN_EN] = REG_FIELD(RT9467_REG_CHG_CTRL1, 1, 1),
[F_OPA_MODE] = REG_FIELD(RT9467_REG_CHG_CTRL1, 0, 0),
[F_SHIP_MODE] = REG_FIELD(RT9467_REG_CHG_CTRL2, 7, 7),
[F_TE] = REG_FIELD(RT9467_REG_CHG_CTRL2, 4, 4),
[F_IINLMTSEL] = REG_FIELD(RT9467_REG_CHG_CTRL2, 2, 3),
[F_CFO_EN] = REG_FIELD(RT9467_REG_CHG_CTRL2, 1, 1),
[F_CHG_EN] = REG_FIELD(RT9467_REG_CHG_CTRL2, 0, 0),
[F_IAICR] = REG_FIELD(RT9467_REG_CHG_CTRL3, 2, 7),
[F_ILIM_EN] = REG_FIELD(RT9467_REG_CHG_CTRL3, 0, 0),
[F_VOREG] = REG_FIELD(RT9467_REG_CHG_CTRL4, 1, 7),
[F_VMIVR] = REG_FIELD(RT9467_REG_CHG_CTRL6, 1, 7),
[F_ICHG] = REG_FIELD(RT9467_REG_CHG_CTRL7, 2, 7),
[F_IPREC] = REG_FIELD(RT9467_REG_CHG_CTRL8, 0, 3),
[F_IEOC] = REG_FIELD(RT9467_REG_CHG_CTRL9, 4, 7),
[F_WT_FC] = REG_FIELD(RT9467_REG_CHG_CTRL12, 5, 7),
[F_OCP] = REG_FIELD(RT9467_REG_CHG_CTRL13, 2, 2),
[F_AICL_MEAS] = REG_FIELD(RT9467_REG_CHG_CTRL14, 7, 7),
[F_AICL_VTH] = REG_FIELD(RT9467_REG_CHG_CTRL14, 0, 2),
[F_USBCHGEN] = REG_FIELD(RT9467_REG_CHG_DPDM1, 7, 7),
[F_USB_STATUS] = REG_FIELD(RT9467_REG_CHG_DPDM2, 0, 2),
[F_VENDOR] = REG_FIELD(RT9467_REG_DEVICE_ID, 4, 7),
[F_CHG_STAT] = REG_FIELD(RT9467_REG_CHG_STAT, 6, 7),
[F_PWR_RDY] = REG_FIELD(RT9467_REG_CHG_STATC, 7, 7),
[F_CHG_MIVR] = REG_FIELD(RT9467_REG_CHG_STATC, 6, 6),
};
enum {
RT9467_STAT_READY = 0,
RT9467_STAT_PROGRESS,
RT9467_STAT_CHARGE_DONE,
RT9467_STAT_FAULT
};
enum rt9467_adc_chan {
RT9467_ADC_VBUS_DIV5 = 0,
RT9467_ADC_VBUS_DIV2,
RT9467_ADC_VSYS,
RT9467_ADC_VBAT,
RT9467_ADC_TS_BAT,
RT9467_ADC_IBUS,
RT9467_ADC_IBAT,
RT9467_ADC_REGN,
RT9467_ADC_TEMP_JC
};
enum rt9467_chg_type {
RT9467_CHG_TYPE_NOVBUS = 0,
RT9467_CHG_TYPE_UNDER_GOING,
RT9467_CHG_TYPE_SDP,
RT9467_CHG_TYPE_SDPNSTD,
RT9467_CHG_TYPE_DCP,
RT9467_CHG_TYPE_CDP,
RT9467_CHG_TYPE_MAX
};
enum rt9467_iin_limit_sel {
RT9467_IINLMTSEL_3_2A = 0,
RT9467_IINLMTSEL_CHG_TYP,
RT9467_IINLMTSEL_AICR,
RT9467_IINLMTSEL_LOWER_LEVEL, /* lower of above three */
};
struct rt9467_chg_data {
struct device *dev;
struct regmap *regmap;
struct regmap_field *rm_field[F_MAX_FIELDS];
struct regmap_irq_chip_data *irq_chip_data;
struct power_supply *psy;
struct mutex adc_lock;
struct mutex attach_lock;
struct mutex ichg_ieoc_lock;
struct regulator_dev *rdev;
struct completion aicl_done;
enum power_supply_usb_type psy_usb_type;
unsigned int old_stat;
unsigned int vid;
int ichg_ua;
int ieoc_ua;
};
static int rt9467_otg_of_parse_cb(struct device_node *of,
const struct regulator_desc *desc,
struct regulator_config *cfg)
{
struct rt9467_chg_data *data = cfg->driver_data;
cfg->ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(of),
"enable", 0, GPIOD_OUT_LOW |
GPIOD_FLAGS_BIT_NONEXCLUSIVE,
desc->name);
if (IS_ERR(cfg->ena_gpiod)) {
cfg->ena_gpiod = NULL;
return 0;
}
return regmap_field_write(data->rm_field[F_OTG_PIN_EN], 1);
}
static const struct regulator_ops rt9467_otg_regulator_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
.get_current_limit = regulator_get_current_limit_regmap,
};
static const u32 rt9467_otg_microamp[] = {
500000, 700000, 1100000, 1300000, 1800000, 2100000, 2400000, 3000000
};
static const struct regulator_desc rt9467_otg_desc = {
.name = "rt9476-usb-otg-vbus",
.of_match = "usb-otg-vbus-regulator",
.of_parse_cb = rt9467_otg_of_parse_cb,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.min_uV = RT9467_OTG_MIN_uV,
.uV_step = RT9467_OTG_STEP_uV,
.n_voltages = RT9467_NUM_VOTG,
.curr_table = rt9467_otg_microamp,
.n_current_limits = ARRAY_SIZE(rt9467_otg_microamp),
.csel_reg = RT9467_REG_CHG_CTRL10,
.csel_mask = RT9467_MASK_OTG_CSEL,
.vsel_reg = RT9467_REG_CHG_CTRL5,
.vsel_mask = RT9467_MASK_OTG_VSEL,
.enable_reg = RT9467_REG_CHG_CTRL1,
.enable_mask = RT9467_MASK_OTG_EN,
.ops = &rt9467_otg_regulator_ops,
};
static int rt9467_register_otg_regulator(struct rt9467_chg_data *data)
{
struct regulator_config cfg = {
.dev = data->dev,
.regmap = data->regmap,
.driver_data = data,
};
data->rdev = devm_regulator_register(data->dev, &rt9467_otg_desc, &cfg);
return PTR_ERR_OR_ZERO(data->rdev);
}
static int rt9467_get_value_from_ranges(struct rt9467_chg_data *data,
enum rt9467_fields field,
enum rt9467_ranges rsel,
int *value)
{
const struct linear_range *range = rt9467_ranges + rsel;
unsigned int sel;
int ret;
ret = regmap_field_read(data->rm_field[field], &sel);
if (ret)
return ret;
return linear_range_get_value(range, sel, value);
}
static int rt9467_set_value_from_ranges(struct rt9467_chg_data *data,
enum rt9467_fields field,
enum rt9467_ranges rsel,
int value)
{
const struct linear_range *range = rt9467_ranges + rsel;
unsigned int sel;
bool found;
int ret;
if (rsel == RT9467_RANGE_VMIVR) {
ret = linear_range_get_selector_high(range, value, &sel, &found);
if (ret)
value = range->max_sel;
} else {
linear_range_get_selector_within(range, value, &sel);
}
return regmap_field_write(data->rm_field[field], sel);
}
static int rt9467_get_adc_sel(enum rt9467_adc_chan chan, int *sel)
{
switch (chan) {
case RT9467_ADC_VBUS_DIV5:
case RT9467_ADC_VBUS_DIV2:
case RT9467_ADC_VSYS:
case RT9467_ADC_VBAT:
*sel = chan + 1;
return 0;
case RT9467_ADC_TS_BAT:
*sel = chan + 2;
return 0;
case RT9467_ADC_IBUS:
case RT9467_ADC_IBAT:
*sel = chan + 3;
return 0;
case RT9467_ADC_REGN:
case RT9467_ADC_TEMP_JC:
*sel = chan + 4;
return 0;
default:
return -EINVAL;
}
}
static int rt9467_get_adc_raw_data(struct rt9467_chg_data *data,
enum rt9467_adc_chan chan, int *val)
{
unsigned int adc_stat, reg_val, adc_sel;
__be16 chan_raw_data;
int ret;
mutex_lock(&data->adc_lock);
ret = rt9467_get_adc_sel(chan, &adc_sel);
if (ret)
goto adc_unlock;
ret = regmap_write(data->regmap, RT9467_REG_CHG_ADC, 0);
if (ret) {
dev_err(data->dev, "Failed to clear ADC enable\n");
goto adc_unlock;
}
reg_val = RT9467_MASK_ADC_START | FIELD_PREP(RT9467_MASK_ADC_IN_SEL, adc_sel);
ret = regmap_write(data->regmap, RT9467_REG_CHG_ADC, reg_val);
if (ret)
goto adc_unlock;
/* Minimum wait time for one channel processing */
msleep(RT9467_ADCCONV_TIME_MS);
ret = regmap_read_poll_timeout(data->regmap, RT9467_REG_CHG_ADC,
adc_stat,
!(adc_stat & RT9467_MASK_ADC_START),
MILLI, RT9467_ADCCONV_TIME_MS * MILLI);
if (ret) {
dev_err(data->dev, "Failed to wait ADC conversion, chan = %d\n", chan);
goto adc_unlock;
}
ret = regmap_raw_read(data->regmap, RT9467_REG_ADC_DATA_H,
&chan_raw_data, sizeof(chan_raw_data));
if (ret)
goto adc_unlock;
*val = be16_to_cpu(chan_raw_data);
adc_unlock:
mutex_unlock(&data->adc_lock);
return ret;
}
static int rt9467_get_adc(struct rt9467_chg_data *data,
enum rt9467_adc_chan chan, int *val)
{
unsigned int aicr_ua, ichg_ua;
int ret;
ret = rt9467_get_adc_raw_data(data, chan, val);
if (ret)
return ret;
switch (chan) {
case RT9467_ADC_VBUS_DIV5:
*val *= 25000;
return 0;
case RT9467_ADC_VBUS_DIV2:
*val *= 10000;
return 0;
case RT9467_ADC_VBAT:
case RT9467_ADC_VSYS:
case RT9467_ADC_REGN:
*val *= 5000;
return 0;
case RT9467_ADC_TS_BAT:
*val /= 400;
return 0;
case RT9467_ADC_IBUS:
/* UUG MOS turn-on ratio will affect the IBUS adc scale */
ret = rt9467_get_value_from_ranges(data, F_IAICR,
RT9467_RANGE_IAICR, &aicr_ua);
if (ret)
return ret;
*val *= aicr_ua < 400000 ? 29480 : 50000;
return 0;
case RT9467_ADC_IBAT:
/* PP MOS turn-on ratio will affect the ICHG adc scale */
ret = rt9467_get_value_from_ranges(data, F_ICHG,
RT9467_RANGE_ICHG, &ichg_ua);
if (ret)
return ret;
*val *= ichg_ua <= 400000 ? 28500 :
ichg_ua <= 800000 ? 31500 : 500000;
return 0;
case RT9467_ADC_TEMP_JC:
*val = ((*val * 2) - 40) * 10;
return 0;
default:
return -EINVAL;
}
}
static int rt9467_psy_get_status(struct rt9467_chg_data *data, int *state)
{
unsigned int status;
int ret;
ret = regmap_field_read(data->rm_field[F_CHG_STAT], &status);
if (ret)
return ret;
switch (status) {
case RT9467_STAT_READY:
*state = POWER_SUPPLY_STATUS_NOT_CHARGING;
return 0;
case RT9467_STAT_PROGRESS:
*state = POWER_SUPPLY_STATUS_CHARGING;
return 0;
case RT9467_STAT_CHARGE_DONE:
*state = POWER_SUPPLY_STATUS_FULL;
return 0;
default:
*state = POWER_SUPPLY_STATUS_UNKNOWN;
return 0;
}
}
static int rt9467_psy_set_ichg(struct rt9467_chg_data *data, int microamp)
{
int ret;
mutex_lock(&data->ichg_ieoc_lock);
if (microamp < 500000) {
dev_err(data->dev, "Minimum value must be 500mA\n");
microamp = 500000;
}
ret = rt9467_set_value_from_ranges(data, F_ICHG, RT9467_RANGE_ICHG, microamp);
if (ret)
goto out;
ret = rt9467_get_value_from_ranges(data, F_ICHG, RT9467_RANGE_ICHG,
&data->ichg_ua);
if (ret)
goto out;
out:
mutex_unlock(&data->ichg_ieoc_lock);
return ret;
}
static int rt9467_run_aicl(struct rt9467_chg_data *data)
{
unsigned int statc, aicl_vth;
int mivr_vth, aicr_get;
int ret = 0;
ret = regmap_read(data->regmap, RT9467_REG_CHG_STATC, &statc);
if (ret) {
dev_err(data->dev, "Failed to read status\n");
return ret;
}
if (!(statc & RT9467_MASK_PWR_RDY) || !(statc & RT9467_MASK_MIVR_STAT)) {
dev_info(data->dev, "Condition not matched %d\n", statc);
return 0;
}
ret = rt9467_get_value_from_ranges(data, F_VMIVR, RT9467_RANGE_VMIVR,
&mivr_vth);
if (ret) {
dev_err(data->dev, "Failed to get mivr\n");
return ret;
}
/* AICL_VTH = MIVR_VTH + 200mV */
aicl_vth = mivr_vth + RT9467_AICLVTH_GAP_uV;
ret = rt9467_set_value_from_ranges(data, F_AICL_VTH,
RT9467_RANGE_AICL_VTH, aicl_vth);
/* Trigger AICL function */
ret = regmap_field_write(data->rm_field[F_AICL_MEAS], 1);
if (ret) {
dev_err(data->dev, "Failed to set aicl measurement\n");
return ret;
}
reinit_completion(&data->aicl_done);
ret = wait_for_completion_timeout(&data->aicl_done, msecs_to_jiffies(3500));
if (ret)
return ret;
ret = rt9467_get_value_from_ranges(data, F_IAICR, RT9467_RANGE_IAICR, &aicr_get);
if (ret) {
dev_err(data->dev, "Failed to get aicr\n");
return ret;
}
dev_info(data->dev, "aicr get = %d uA\n", aicr_get);
return 0;
}
static int rt9467_psy_set_ieoc(struct rt9467_chg_data *data, int microamp)
{
int ret;
mutex_lock(&data->ichg_ieoc_lock);
ret = rt9467_set_value_from_ranges(data, F_IEOC, RT9467_RANGE_IEOC, microamp);
if (ret)
goto out;
ret = rt9467_get_value_from_ranges(data, F_IEOC, RT9467_RANGE_IEOC, &data->ieoc_ua);
if (ret)
goto out;
out:
mutex_unlock(&data->ichg_ieoc_lock);
return ret;
}
static const enum power_supply_usb_type rt9467_chg_usb_types[] = {
POWER_SUPPLY_USB_TYPE_UNKNOWN,
POWER_SUPPLY_USB_TYPE_SDP,
POWER_SUPPLY_USB_TYPE_DCP,
POWER_SUPPLY_USB_TYPE_CDP,
};
static const enum power_supply_property rt9467_chg_properties[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
POWER_SUPPLY_PROP_USB_TYPE,
POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
};
static int rt9467_psy_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct rt9467_chg_data *data = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
return rt9467_psy_get_status(data, &val->intval);
case POWER_SUPPLY_PROP_ONLINE:
return regmap_field_read(data->rm_field[F_PWR_RDY], &val->intval);
case POWER_SUPPLY_PROP_CURRENT_MAX:
mutex_lock(&data->attach_lock);
if (data->psy_usb_type == POWER_SUPPLY_USB_TYPE_UNKNOWN ||
data->psy_usb_type == POWER_SUPPLY_USB_TYPE_SDP)
val->intval = 500000;
else
val->intval = 1500000;
mutex_unlock(&data->attach_lock);
return 0;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
mutex_lock(&data->ichg_ieoc_lock);
val->intval = data->ichg_ua;
mutex_unlock(&data->ichg_ieoc_lock);
return 0;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
val->intval = RT9467_ICHG_MAX_uA;
return 0;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
return rt9467_get_value_from_ranges(data, F_VOREG,
RT9467_RANGE_VOREG,
&val->intval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
val->intval = RT9467_CV_MAX_uV;
return 0;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return rt9467_get_value_from_ranges(data, F_IAICR,
RT9467_RANGE_IAICR,
&val->intval);
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
return rt9467_get_value_from_ranges(data, F_VMIVR,
RT9467_RANGE_VMIVR,
&val->intval);
case POWER_SUPPLY_PROP_USB_TYPE:
mutex_lock(&data->attach_lock);
val->intval = data->psy_usb_type;
mutex_unlock(&data->attach_lock);
return 0;
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
return rt9467_get_value_from_ranges(data, F_IPREC,
RT9467_RANGE_IPREC,
&val->intval);
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
mutex_lock(&data->ichg_ieoc_lock);
val->intval = data->ieoc_ua;
mutex_unlock(&data->ichg_ieoc_lock);
return 0;
default:
return -ENODATA;
}
}
static int rt9467_psy_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct rt9467_chg_data *data = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
return regmap_field_write(data->rm_field[F_CHG_EN], val->intval);
case POWER_SUPPLY_PROP_ONLINE:
return regmap_field_write(data->rm_field[F_HZ], val->intval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
return rt9467_psy_set_ichg(data, val->intval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
return rt9467_set_value_from_ranges(data, F_VOREG,
RT9467_RANGE_VOREG, val->intval);
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
if (val->intval == -1)
return rt9467_run_aicl(data);
else
return rt9467_set_value_from_ranges(data, F_IAICR,
RT9467_RANGE_IAICR,
val->intval);
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
return rt9467_set_value_from_ranges(data, F_VMIVR,
RT9467_RANGE_VMIVR, val->intval);
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
return rt9467_set_value_from_ranges(data, F_IPREC,
RT9467_RANGE_IPREC, val->intval);
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return rt9467_psy_set_ieoc(data, val->intval);
case POWER_SUPPLY_PROP_USB_TYPE:
return regmap_field_write(data->rm_field[F_USBCHGEN], val->intval);
default:
return -EINVAL;
}
}
static int rt9467_chg_prop_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
case POWER_SUPPLY_PROP_ONLINE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
case POWER_SUPPLY_PROP_USB_TYPE:
return 1;
default:
return 0;
}
}
static const struct power_supply_desc rt9467_chg_psy_desc = {
.name = "rt9467-charger",
.type = POWER_SUPPLY_TYPE_USB,
.usb_types = rt9467_chg_usb_types,
.num_usb_types = ARRAY_SIZE(rt9467_chg_usb_types),
.properties = rt9467_chg_properties,
.num_properties = ARRAY_SIZE(rt9467_chg_properties),
.property_is_writeable = rt9467_chg_prop_is_writeable,
.get_property = rt9467_psy_get_property,
.set_property = rt9467_psy_set_property,
};
static inline struct rt9467_chg_data *psy_device_to_chip(struct device *dev)
{
return power_supply_get_drvdata(to_power_supply(dev));
}
static ssize_t sysoff_enable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct rt9467_chg_data *data = psy_device_to_chip(dev);
unsigned int sysoff_enable;
int ret;
ret = regmap_field_read(data->rm_field[F_SHIP_MODE], &sysoff_enable);
if (ret)
return ret;
return sysfs_emit(buf, "%d\n", sysoff_enable);
}
static ssize_t sysoff_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct rt9467_chg_data *data = psy_device_to_chip(dev);
unsigned int tmp;
int ret;
ret = kstrtouint(buf, 10, &tmp);
if (ret)
return ret;
ret = regmap_field_write(data->rm_field[F_SHIP_MODE], !!tmp);
if (ret)
return ret;
return count;
}
static DEVICE_ATTR_RW(sysoff_enable);
static struct attribute *rt9467_sysfs_attrs[] = {
&dev_attr_sysoff_enable.attr,
NULL
};
ATTRIBUTE_GROUPS(rt9467_sysfs);
static int rt9467_register_psy(struct rt9467_chg_data *data)
{
struct power_supply_config cfg = {
.drv_data = data,
.of_node = dev_of_node(data->dev),
.attr_grp = rt9467_sysfs_groups,
};
data->psy = devm_power_supply_register(data->dev, &rt9467_chg_psy_desc,
&cfg);
return PTR_ERR_OR_ZERO(data->psy);
}
static int rt9467_mivr_handler(struct rt9467_chg_data *data)
{
unsigned int mivr_act;
int ret, ibus_ma;
/*
* back-boost workaround
* If (mivr_active & ibus < 100mA), toggle cfo bit
*/
ret = regmap_field_read(data->rm_field[F_CHG_MIVR], &mivr_act);
if (ret) {
dev_err(data->dev, "Failed to read MIVR stat\n");
return ret;
}
if (!mivr_act)
return 0;
ret = rt9467_get_adc(data, RT9467_ADC_IBUS, &ibus_ma);
if (ret) {
dev_err(data->dev, "Failed to get IBUS\n");
return ret;
}
if (ibus_ma < 100000) {
ret = regmap_field_write(data->rm_field[F_CFO_EN], 0);
ret |= regmap_field_write(data->rm_field[F_CFO_EN], 1);
if (ret)
dev_err(data->dev, "Failed to toggle cfo\n");
}
return ret;
}
static irqreturn_t rt9467_statc_handler(int irq, void *priv)
{
struct rt9467_chg_data *data = priv;
unsigned int new_stat, evts = 0;
int ret;
ret = regmap_read(data->regmap, RT9467_REG_CHG_STATC, &new_stat);
if (ret) {
dev_err(data->dev, "Failed to read chg_statc\n");
return IRQ_NONE;
}
evts = data->old_stat ^ new_stat;
data->old_stat = new_stat;
if ((evts & new_stat) & RT9467_MASK_MIVR_STAT) {
ret = rt9467_mivr_handler(data);
if (ret)
dev_err(data->dev, "Failed to handle mivr stat\n");
}
return IRQ_HANDLED;
}
static irqreturn_t rt9467_wdt_handler(int irq, void *priv)
{
struct rt9467_chg_data *data = priv;
unsigned int dev_id;
int ret;
/* Any i2c communication can kick watchdog timer */
ret = regmap_read(data->regmap, RT9467_REG_DEVICE_ID, &dev_id);
if (ret) {
dev_err(data->dev, "Failed to kick wdt (%d)\n", ret);
return IRQ_NONE;
}
return IRQ_HANDLED;
}
static int rt9467_report_usb_state(struct rt9467_chg_data *data)
{
unsigned int usb_stat, power_ready;
bool psy_changed = true;
int ret;
ret = regmap_field_read(data->rm_field[F_USB_STATUS], &usb_stat);
ret |= regmap_field_read(data->rm_field[F_PWR_RDY], &power_ready);
if (ret)
return ret;
if (!power_ready)
usb_stat = RT9467_CHG_TYPE_NOVBUS;
mutex_lock(&data->attach_lock);
switch (usb_stat) {
case RT9467_CHG_TYPE_NOVBUS:
data->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
break;
case RT9467_CHG_TYPE_SDP:
data->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
break;
case RT9467_CHG_TYPE_SDPNSTD:
data->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
break;
case RT9467_CHG_TYPE_DCP:
data->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
break;
case RT9467_CHG_TYPE_CDP:
data->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
break;
case RT9467_CHG_TYPE_UNDER_GOING:
default:
psy_changed = false;
break;
}
mutex_unlock(&data->attach_lock);
if (psy_changed)
power_supply_changed(data->psy);
return 0;
}
static irqreturn_t rt9467_usb_state_handler(int irq, void *priv)
{
struct rt9467_chg_data *data = priv;
int ret;
ret = rt9467_report_usb_state(data);
if (ret) {
dev_err(data->dev, "Failed to report attach type (%d)\n", ret);
return IRQ_NONE;
}
return IRQ_HANDLED;
}
static irqreturn_t rt9467_aiclmeas_handler(int irq, void *priv)
{
struct rt9467_chg_data *data = priv;
complete(&data->aicl_done);
return IRQ_HANDLED;
}
#define RT9467_IRQ_DESC(_name, _handler_func, _hwirq) \
{ \
.name = #_name, \
.handler = rt9467_##_handler_func##_handler, \
.hwirq = _hwirq, \
}
static int rt9467_request_interrupt(struct rt9467_chg_data *data)
{
struct device *dev = data->dev;
static const struct {
const char *name;
int hwirq;
irq_handler_t handler;
} rt9467_exclusive_irqs[] = {
RT9467_IRQ_DESC(statc, statc, RT9467_IRQ_TS_STATC),
RT9467_IRQ_DESC(wdt, wdt, RT9467_IRQ_WDTMR),
RT9467_IRQ_DESC(attach, usb_state, RT9467_IRQ_ATTACH),
RT9467_IRQ_DESC(detach, usb_state, RT9467_IRQ_DETACH),
RT9467_IRQ_DESC(aiclmeas, aiclmeas, RT9467_IRQ_CHG_AICLM),
}, rt9466_exclusive_irqs[] = {
RT9467_IRQ_DESC(statc, statc, RT9467_IRQ_TS_STATC),
RT9467_IRQ_DESC(wdt, wdt, RT9467_IRQ_WDTMR),
RT9467_IRQ_DESC(aiclmeas, aiclmeas, RT9467_IRQ_CHG_AICLM),
}, *chg_irqs;
int num_chg_irqs, i, virq, ret;
if (data->vid == RT9466_VID) {
chg_irqs = rt9466_exclusive_irqs;
num_chg_irqs = ARRAY_SIZE(rt9466_exclusive_irqs);
} else {
chg_irqs = rt9467_exclusive_irqs;
num_chg_irqs = ARRAY_SIZE(rt9467_exclusive_irqs);
}
for (i = 0; i < num_chg_irqs; i++) {
virq = regmap_irq_get_virq(data->irq_chip_data, chg_irqs[i].hwirq);
if (virq <= 0)
return dev_err_probe(dev, -EINVAL, "Failed to get (%s) irq\n",
chg_irqs[i].name);
ret = devm_request_threaded_irq(dev, virq, NULL, chg_irqs[i].handler,
IRQF_ONESHOT, chg_irqs[i].name, data);
if (ret)
return dev_err_probe(dev, ret, "Failed to request (%s) irq\n",
chg_irqs[i].name);
}
return 0;
}
static int rt9467_do_charger_init(struct rt9467_chg_data *data)
{
struct device *dev = data->dev;
int ret;
ret = regmap_write(data->regmap, RT9467_REG_CHG_ADC, 0);
if (ret)
return dev_err_probe(dev, ret, "Failed to reset ADC\n");
ret = rt9467_get_value_from_ranges(data, F_ICHG, RT9467_RANGE_ICHG,
&data->ichg_ua);
ret |= rt9467_get_value_from_ranges(data, F_IEOC, RT9467_RANGE_IEOC,
&data->ieoc_ua);
if (ret)
return dev_err_probe(dev, ret, "Failed to init ichg/ieoc value\n");
ret = regmap_update_bits(data->regmap, RT9467_REG_CHG_STATC_CTRL,
RT9467_MASK_PWR_RDY | RT9467_MASK_MIVR_STAT, 0);
if (ret)
return dev_err_probe(dev, ret, "Failed to make statc unmask\n");
/* Select IINLMTSEL to use AICR */
ret = regmap_field_write(data->rm_field[F_IINLMTSEL],
RT9467_IINLMTSEL_AICR);
if (ret)
return dev_err_probe(dev, ret, "Failed to set iinlmtsel to AICR\n");
/* Wait for AICR Rampping */
msleep(150);
/* Disable hardware ILIM */
ret = regmap_field_write(data->rm_field[F_ILIM_EN], 0);
if (ret)
return dev_err_probe(dev, ret, "Failed to disable hardware ILIM\n");
/* Set inductor OCP to high level */
ret = regmap_field_write(data->rm_field[F_OCP], 1);
if (ret)
return dev_err_probe(dev, ret, "Failed to set higher inductor OCP level\n");
/* Set charge termination default enable */
ret = regmap_field_write(data->rm_field[F_TE], 1);
if (ret)
return dev_err_probe(dev, ret, "Failed to set TE=1\n");
/* Set 12hrs fast charger timer */
ret = regmap_field_write(data->rm_field[F_WT_FC], 4);
if (ret)
return dev_err_probe(dev, ret, "Failed to set WT_FC\n");
/* Toggle BC12 function */
ret = regmap_field_write(data->rm_field[F_USBCHGEN], 0);
if (ret)
return dev_err_probe(dev, ret, "Failed to disable BC12\n");
return regmap_field_write(data->rm_field[F_USBCHGEN], 1);
}
static bool rt9467_is_accessible_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case 0x00 ... 0x1A:
case 0x20 ... 0x38:
case 0x40 ... 0x49:
case 0x50 ... 0x57:
case 0x60 ... 0x67:
case 0x70 ... 0x79:
case 0x82 ... 0x85:
return true;
default:
return false;
}
}
static const struct regmap_config rt9467_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0x85,
.writeable_reg = rt9467_is_accessible_reg,
.readable_reg = rt9467_is_accessible_reg,
};
static int rt9467_check_vendor_info(struct rt9467_chg_data *data)
{
unsigned int vid;
int ret;
ret = regmap_field_read(data->rm_field[F_VENDOR], &vid);
if (ret) {
dev_err(data->dev, "Failed to get vid\n");
return ret;
}
if ((vid != RT9466_VID) && (vid != RT9467_VID))
return dev_err_probe(data->dev, -ENODEV,
"VID not correct [0x%02X]\n", vid);
data->vid = vid;
return 0;
}
static int rt9467_reset_chip(struct rt9467_chg_data *data)
{
int ret;
/* Disable HZ before reset chip */
ret = regmap_field_write(data->rm_field[F_HZ], 0);
if (ret)
return ret;
return regmap_field_write(data->rm_field[F_RST], 1);
}
static void rt9467_chg_destroy_adc_lock(void *data)
{
struct mutex *adc_lock = data;
mutex_destroy(adc_lock);
}
static void rt9467_chg_destroy_attach_lock(void *data)
{
struct mutex *attach_lock = data;
mutex_destroy(attach_lock);
}
static void rt9467_chg_destroy_ichg_ieoc_lock(void *data)
{
struct mutex *ichg_ieoc_lock = data;
mutex_destroy(ichg_ieoc_lock);
}
static void rt9467_chg_complete_aicl_done(void *data)
{
struct completion *aicl_done = data;
complete(aicl_done);
}
static int rt9467_charger_probe(struct i2c_client *i2c)
{
struct device *dev = &i2c->dev;
struct rt9467_chg_data *data;
struct gpio_desc *ceb_gpio;
int ret;
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->dev = &i2c->dev;
i2c_set_clientdata(i2c, data);
/* Default pull charge enable gpio to make 'CHG_EN' by SW control only */
ceb_gpio = devm_gpiod_get_optional(dev, "charge-enable", GPIOD_OUT_HIGH);
if (IS_ERR(ceb_gpio))
return dev_err_probe(dev, PTR_ERR(ceb_gpio),
"Failed to config charge enable gpio\n");
data->regmap = devm_regmap_init_i2c(i2c, &rt9467_regmap_config);
if (IS_ERR(data->regmap))
return dev_err_probe(dev, PTR_ERR(data->regmap),
"Failed to init regmap\n");
ret = devm_regmap_field_bulk_alloc(dev, data->regmap,
data->rm_field, rt9467_chg_fields,
ARRAY_SIZE(rt9467_chg_fields));
if (ret)
return dev_err_probe(dev, ret, "Failed to alloc regmap fields\n");
ret = rt9467_check_vendor_info(data);
if (ret)
return dev_err_probe(dev, ret, "Failed to check vendor info");
ret = rt9467_reset_chip(data);
if (ret)
return dev_err_probe(dev, ret, "Failed to reset chip\n");
ret = devm_regmap_add_irq_chip(dev, data->regmap, i2c->irq,
IRQF_TRIGGER_LOW | IRQF_ONESHOT, 0,
&rt9467_irq_chip, &data->irq_chip_data);
if (ret)
return dev_err_probe(dev, ret, "Failed to add irq chip\n");
mutex_init(&data->adc_lock);
ret = devm_add_action_or_reset(dev, rt9467_chg_destroy_adc_lock,
&data->adc_lock);
if (ret)
return dev_err_probe(dev, ret, "Failed to init ADC lock\n");
mutex_init(&data->attach_lock);
ret = devm_add_action_or_reset(dev, rt9467_chg_destroy_attach_lock,
&data->attach_lock);
if (ret)
return dev_err_probe(dev, ret, "Failed to init attach lock\n");
mutex_init(&data->ichg_ieoc_lock);
ret = devm_add_action_or_reset(dev, rt9467_chg_destroy_ichg_ieoc_lock,
&data->ichg_ieoc_lock);
if (ret)
return dev_err_probe(dev, ret, "Failed to init ICHG/IEOC lock\n");
init_completion(&data->aicl_done);
ret = devm_add_action_or_reset(dev, rt9467_chg_complete_aicl_done,
&data->aicl_done);
if (ret)
return dev_err_probe(dev, ret, "Failed to init AICL done completion\n");
ret = rt9467_do_charger_init(data);
if (ret)
return ret;
ret = rt9467_register_otg_regulator(data);
if (ret)
return ret;
ret = rt9467_register_psy(data);
if (ret)
return ret;
return rt9467_request_interrupt(data);
}
static const struct of_device_id rt9467_charger_of_match_table[] = {
{ .compatible = "richtek,rt9467", },
{}
};
MODULE_DEVICE_TABLE(of, rt9467_charger_of_match_table);
static struct i2c_driver rt9467_charger_driver = {
.driver = {
.name = "rt9467-charger",
.of_match_table = rt9467_charger_of_match_table,
},
.probe = rt9467_charger_probe,
};
module_i2c_driver(rt9467_charger_driver);
MODULE_DESCRIPTION("Richtek RT9467 Charger Driver");
MODULE_AUTHOR("ChiYuan Huang <[email protected]>");
MODULE_AUTHOR("ChiaEn Wu <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/rt9467-charger.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Summit Microelectronics SMB347 Battery Charger Driver
*
* Copyright (C) 2011, Intel Corporation
*
* Authors: Bruce E. Robertson <[email protected]>
* Mika Westerberg <[email protected]>
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/power_supply.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <dt-bindings/power/summit,smb347-charger.h>
/* Use the default compensation method */
#define SMB3XX_SOFT_TEMP_COMPENSATE_DEFAULT -1
/* Use default factory programmed value for hard/soft temperature limit */
#define SMB3XX_TEMP_USE_DEFAULT -273
/*
* Configuration registers. These are mirrored to volatile RAM and can be
* written once %CMD_A_ALLOW_WRITE is set in %CMD_A register. They will be
* reloaded from non-volatile registers after POR.
*/
#define CFG_CHARGE_CURRENT 0x00
#define CFG_CHARGE_CURRENT_FCC_MASK 0xe0
#define CFG_CHARGE_CURRENT_FCC_SHIFT 5
#define CFG_CHARGE_CURRENT_PCC_MASK 0x18
#define CFG_CHARGE_CURRENT_PCC_SHIFT 3
#define CFG_CHARGE_CURRENT_TC_MASK 0x07
#define CFG_CURRENT_LIMIT 0x01
#define CFG_CURRENT_LIMIT_DC_MASK 0xf0
#define CFG_CURRENT_LIMIT_DC_SHIFT 4
#define CFG_CURRENT_LIMIT_USB_MASK 0x0f
#define CFG_FLOAT_VOLTAGE 0x03
#define CFG_FLOAT_VOLTAGE_FLOAT_MASK 0x3f
#define CFG_FLOAT_VOLTAGE_THRESHOLD_MASK 0xc0
#define CFG_FLOAT_VOLTAGE_THRESHOLD_SHIFT 6
#define CFG_STAT 0x05
#define CFG_STAT_DISABLED BIT(5)
#define CFG_STAT_ACTIVE_HIGH BIT(7)
#define CFG_PIN 0x06
#define CFG_PIN_EN_CTRL_MASK 0x60
#define CFG_PIN_EN_CTRL_ACTIVE_HIGH 0x40
#define CFG_PIN_EN_CTRL_ACTIVE_LOW 0x60
#define CFG_PIN_EN_APSD_IRQ BIT(1)
#define CFG_PIN_EN_CHARGER_ERROR BIT(2)
#define CFG_PIN_EN_CTRL BIT(4)
#define CFG_THERM 0x07
#define CFG_THERM_SOFT_HOT_COMPENSATION_MASK 0x03
#define CFG_THERM_SOFT_HOT_COMPENSATION_SHIFT 0
#define CFG_THERM_SOFT_COLD_COMPENSATION_MASK 0x0c
#define CFG_THERM_SOFT_COLD_COMPENSATION_SHIFT 2
#define CFG_THERM_MONITOR_DISABLED BIT(4)
#define CFG_SYSOK 0x08
#define CFG_SYSOK_INOK_ACTIVE_HIGH BIT(0)
#define CFG_SYSOK_SUSPEND_HARD_LIMIT_DISABLED BIT(2)
#define CFG_OTHER 0x09
#define CFG_OTHER_RID_MASK 0xc0
#define CFG_OTHER_RID_ENABLED_AUTO_OTG 0xc0
#define CFG_OTG 0x0a
#define CFG_OTG_TEMP_THRESHOLD_MASK 0x30
#define CFG_OTG_CURRENT_LIMIT_250mA BIT(2)
#define CFG_OTG_CURRENT_LIMIT_750mA BIT(3)
#define CFG_OTG_TEMP_THRESHOLD_SHIFT 4
#define CFG_OTG_CC_COMPENSATION_MASK 0xc0
#define CFG_OTG_CC_COMPENSATION_SHIFT 6
#define CFG_TEMP_LIMIT 0x0b
#define CFG_TEMP_LIMIT_SOFT_HOT_MASK 0x03
#define CFG_TEMP_LIMIT_SOFT_HOT_SHIFT 0
#define CFG_TEMP_LIMIT_SOFT_COLD_MASK 0x0c
#define CFG_TEMP_LIMIT_SOFT_COLD_SHIFT 2
#define CFG_TEMP_LIMIT_HARD_HOT_MASK 0x30
#define CFG_TEMP_LIMIT_HARD_HOT_SHIFT 4
#define CFG_TEMP_LIMIT_HARD_COLD_MASK 0xc0
#define CFG_TEMP_LIMIT_HARD_COLD_SHIFT 6
#define CFG_FAULT_IRQ 0x0c
#define CFG_FAULT_IRQ_DCIN_UV BIT(2)
#define CFG_STATUS_IRQ 0x0d
#define CFG_STATUS_IRQ_TERMINATION_OR_TAPER BIT(4)
#define CFG_STATUS_IRQ_CHARGE_TIMEOUT BIT(7)
#define CFG_ADDRESS 0x0e
/* Command registers */
#define CMD_A 0x30
#define CMD_A_CHG_ENABLED BIT(1)
#define CMD_A_SUSPEND_ENABLED BIT(2)
#define CMD_A_OTG_ENABLED BIT(4)
#define CMD_A_ALLOW_WRITE BIT(7)
#define CMD_B 0x31
#define CMD_C 0x33
/* Interrupt Status registers */
#define IRQSTAT_A 0x35
#define IRQSTAT_C 0x37
#define IRQSTAT_C_TERMINATION_STAT BIT(0)
#define IRQSTAT_C_TERMINATION_IRQ BIT(1)
#define IRQSTAT_C_TAPER_IRQ BIT(3)
#define IRQSTAT_D 0x38
#define IRQSTAT_D_CHARGE_TIMEOUT_STAT BIT(2)
#define IRQSTAT_D_CHARGE_TIMEOUT_IRQ BIT(3)
#define IRQSTAT_E 0x39
#define IRQSTAT_E_USBIN_UV_STAT BIT(0)
#define IRQSTAT_E_USBIN_UV_IRQ BIT(1)
#define IRQSTAT_E_DCIN_UV_STAT BIT(4)
#define IRQSTAT_E_DCIN_UV_IRQ BIT(5)
#define IRQSTAT_F 0x3a
/* Status registers */
#define STAT_A 0x3b
#define STAT_A_FLOAT_VOLTAGE_MASK 0x3f
#define STAT_B 0x3c
#define STAT_C 0x3d
#define STAT_C_CHG_ENABLED BIT(0)
#define STAT_C_HOLDOFF_STAT BIT(3)
#define STAT_C_CHG_MASK 0x06
#define STAT_C_CHG_SHIFT 1
#define STAT_C_CHG_TERM BIT(5)
#define STAT_C_CHARGER_ERROR BIT(6)
#define STAT_E 0x3f
#define SMB347_MAX_REGISTER 0x3f
/**
* struct smb347_charger - smb347 charger instance
* @dev: pointer to device
* @regmap: pointer to driver regmap
* @mains: power_supply instance for AC/DC power
* @usb: power_supply instance for USB power
* @usb_rdev: USB VBUS regulator device
* @id: SMB charger ID
* @mains_online: is AC/DC input connected
* @usb_online: is USB input connected
* @irq_unsupported: is interrupt unsupported by SMB hardware
* @usb_vbus_enabled: is USB VBUS powered by SMB charger
* @max_charge_current: maximum current (in uA) the battery can be charged
* @max_charge_voltage: maximum voltage (in uV) the battery can be charged
* @pre_charge_current: current (in uA) to use in pre-charging phase
* @termination_current: current (in uA) used to determine when the
* charging cycle terminates
* @pre_to_fast_voltage: voltage (in uV) treshold used for transitioning to
* pre-charge to fast charge mode
* @mains_current_limit: maximum input current drawn from AC/DC input (in uA)
* @usb_hc_current_limit: maximum input high current (in uA) drawn from USB
* input
* @chip_temp_threshold: die temperature where device starts limiting charge
* current [%100 - %130] (in degree C)
* @soft_cold_temp_limit: soft cold temperature limit [%0 - %15] (in degree C),
* granularity is 5 deg C.
* @soft_hot_temp_limit: soft hot temperature limit [%40 - %55] (in degree C),
* granularity is 5 deg C.
* @hard_cold_temp_limit: hard cold temperature limit [%-5 - %10] (in degree C),
* granularity is 5 deg C.
* @hard_hot_temp_limit: hard hot temperature limit [%50 - %65] (in degree C),
* granularity is 5 deg C.
* @suspend_on_hard_temp_limit: suspend charging when hard limit is hit
* @soft_temp_limit_compensation: compensation method when soft temperature
* limit is hit
* @charge_current_compensation: current (in uA) for charging compensation
* current when temperature hits soft limits
* @use_mains: AC/DC input can be used
* @use_usb: USB input can be used
* @use_usb_otg: USB OTG output can be used (not implemented yet)
* @enable_control: how charging enable/disable is controlled
* (driver/pin controls)
* @inok_polarity: polarity of INOK signal which denotes presence of external
* power supply
*
* @use_main, @use_usb, and @use_usb_otg are means to enable/disable
* hardware support for these. This is useful when we want to have for
* example OTG charging controlled via OTG transceiver driver and not by
* the SMB347 hardware.
*
* Hard and soft temperature limit values are given as described in the
* device data sheet and assuming NTC beta value is %3750. Even if this is
* not the case, these values should be used. They can be mapped to the
* corresponding NTC beta values with the help of table %2 in the data
* sheet. So for example if NTC beta is %3375 and we want to program hard
* hot limit to be %53 deg C, @hard_hot_temp_limit should be set to %50.
*
* If zero value is given in any of the current and voltage values, the
* factory programmed default will be used. For soft/hard temperature
* values, pass in %SMB3XX_TEMP_USE_DEFAULT instead.
*/
struct smb347_charger {
struct device *dev;
struct regmap *regmap;
struct power_supply *mains;
struct power_supply *usb;
struct regulator_dev *usb_rdev;
unsigned int id;
bool mains_online;
bool usb_online;
bool irq_unsupported;
bool usb_vbus_enabled;
unsigned int max_charge_current;
unsigned int max_charge_voltage;
unsigned int pre_charge_current;
unsigned int termination_current;
unsigned int pre_to_fast_voltage;
unsigned int mains_current_limit;
unsigned int usb_hc_current_limit;
unsigned int chip_temp_threshold;
int soft_cold_temp_limit;
int soft_hot_temp_limit;
int hard_cold_temp_limit;
int hard_hot_temp_limit;
bool suspend_on_hard_temp_limit;
unsigned int soft_temp_limit_compensation;
unsigned int charge_current_compensation;
bool use_mains;
bool use_usb;
bool use_usb_otg;
unsigned int enable_control;
unsigned int inok_polarity;
};
enum smb_charger_chipid {
SMB345,
SMB347,
SMB358,
NUM_CHIP_TYPES,
};
/* Fast charge current in uA */
static const unsigned int fcc_tbl[NUM_CHIP_TYPES][8] = {
[SMB345] = { 200000, 450000, 600000, 900000,
1300000, 1500000, 1800000, 2000000 },
[SMB347] = { 700000, 900000, 1200000, 1500000,
1800000, 2000000, 2200000, 2500000 },
[SMB358] = { 200000, 450000, 600000, 900000,
1300000, 1500000, 1800000, 2000000 },
};
/* Pre-charge current in uA */
static const unsigned int pcc_tbl[NUM_CHIP_TYPES][4] = {
[SMB345] = { 150000, 250000, 350000, 450000 },
[SMB347] = { 100000, 150000, 200000, 250000 },
[SMB358] = { 150000, 250000, 350000, 450000 },
};
/* Termination current in uA */
static const unsigned int tc_tbl[NUM_CHIP_TYPES][8] = {
[SMB345] = { 30000, 40000, 60000, 80000,
100000, 125000, 150000, 200000 },
[SMB347] = { 37500, 50000, 100000, 150000,
200000, 250000, 500000, 600000 },
[SMB358] = { 30000, 40000, 60000, 80000,
100000, 125000, 150000, 200000 },
};
/* Input current limit in uA */
static const unsigned int icl_tbl[NUM_CHIP_TYPES][10] = {
[SMB345] = { 300000, 500000, 700000, 1000000, 1500000,
1800000, 2000000, 2000000, 2000000, 2000000 },
[SMB347] = { 300000, 500000, 700000, 900000, 1200000,
1500000, 1800000, 2000000, 2200000, 2500000 },
[SMB358] = { 300000, 500000, 700000, 1000000, 1500000,
1800000, 2000000, 2000000, 2000000, 2000000 },
};
/* Charge current compensation in uA */
static const unsigned int ccc_tbl[NUM_CHIP_TYPES][4] = {
[SMB345] = { 200000, 450000, 600000, 900000 },
[SMB347] = { 250000, 700000, 900000, 1200000 },
[SMB358] = { 200000, 450000, 600000, 900000 },
};
/* Convert register value to current using lookup table */
static int hw_to_current(const unsigned int *tbl, size_t size, unsigned int val)
{
if (val >= size)
return -EINVAL;
return tbl[val];
}
/* Convert current to register value using lookup table */
static int current_to_hw(const unsigned int *tbl, size_t size, unsigned int val)
{
size_t i;
for (i = 0; i < size; i++)
if (val < tbl[i])
break;
return i > 0 ? i - 1 : -EINVAL;
}
/**
* smb347_update_ps_status - refreshes the power source status
* @smb: pointer to smb347 charger instance
*
* Function checks whether any power source is connected to the charger and
* updates internal state accordingly. If there is a change to previous state
* function returns %1, otherwise %0 and negative errno in case of errror.
*/
static int smb347_update_ps_status(struct smb347_charger *smb)
{
bool usb = false;
bool dc = false;
unsigned int val;
int ret;
ret = regmap_read(smb->regmap, IRQSTAT_E, &val);
if (ret < 0)
return ret;
/*
* Dc and usb are set depending on whether they are enabled in
* platform data _and_ whether corresponding undervoltage is set.
*/
if (smb->use_mains)
dc = !(val & IRQSTAT_E_DCIN_UV_STAT);
if (smb->use_usb)
usb = !(val & IRQSTAT_E_USBIN_UV_STAT);
ret = smb->mains_online != dc || smb->usb_online != usb;
smb->mains_online = dc;
smb->usb_online = usb;
return ret;
}
/*
* smb347_is_ps_online - returns whether input power source is connected
* @smb: pointer to smb347 charger instance
*
* Returns %true if input power source is connected. Note that this is
* dependent on what platform has configured for usable power sources. For
* example if USB is disabled, this will return %false even if the USB cable
* is connected.
*/
static bool smb347_is_ps_online(struct smb347_charger *smb)
{
return smb->usb_online || smb->mains_online;
}
/**
* smb347_charging_status - returns status of charging
* @smb: pointer to smb347 charger instance
*
* Function returns charging status. %0 means no charging is in progress,
* %1 means pre-charging, %2 fast-charging and %3 taper-charging.
*/
static int smb347_charging_status(struct smb347_charger *smb)
{
unsigned int val;
int ret;
if (!smb347_is_ps_online(smb))
return 0;
ret = regmap_read(smb->regmap, STAT_C, &val);
if (ret < 0)
return 0;
return (val & STAT_C_CHG_MASK) >> STAT_C_CHG_SHIFT;
}
static int smb347_charging_set(struct smb347_charger *smb, bool enable)
{
if (smb->enable_control != SMB3XX_CHG_ENABLE_SW) {
dev_dbg(smb->dev, "charging enable/disable in SW disabled\n");
return 0;
}
if (enable && smb->usb_vbus_enabled) {
dev_dbg(smb->dev, "charging not enabled because USB is in host mode\n");
return 0;
}
return regmap_update_bits(smb->regmap, CMD_A, CMD_A_CHG_ENABLED,
enable ? CMD_A_CHG_ENABLED : 0);
}
static inline int smb347_charging_enable(struct smb347_charger *smb)
{
return smb347_charging_set(smb, true);
}
static inline int smb347_charging_disable(struct smb347_charger *smb)
{
return smb347_charging_set(smb, false);
}
static int smb347_start_stop_charging(struct smb347_charger *smb)
{
int ret;
/*
* Depending on whether valid power source is connected or not, we
* disable or enable the charging. We do it manually because it
* depends on how the platform has configured the valid inputs.
*/
if (smb347_is_ps_online(smb)) {
ret = smb347_charging_enable(smb);
if (ret < 0)
dev_err(smb->dev, "failed to enable charging\n");
} else {
ret = smb347_charging_disable(smb);
if (ret < 0)
dev_err(smb->dev, "failed to disable charging\n");
}
return ret;
}
static int smb347_set_charge_current(struct smb347_charger *smb)
{
unsigned int id = smb->id;
int ret;
if (smb->max_charge_current) {
ret = current_to_hw(fcc_tbl[id], ARRAY_SIZE(fcc_tbl[id]),
smb->max_charge_current);
if (ret < 0)
return ret;
ret = regmap_update_bits(smb->regmap, CFG_CHARGE_CURRENT,
CFG_CHARGE_CURRENT_FCC_MASK,
ret << CFG_CHARGE_CURRENT_FCC_SHIFT);
if (ret < 0)
return ret;
}
if (smb->pre_charge_current) {
ret = current_to_hw(pcc_tbl[id], ARRAY_SIZE(pcc_tbl[id]),
smb->pre_charge_current);
if (ret < 0)
return ret;
ret = regmap_update_bits(smb->regmap, CFG_CHARGE_CURRENT,
CFG_CHARGE_CURRENT_PCC_MASK,
ret << CFG_CHARGE_CURRENT_PCC_SHIFT);
if (ret < 0)
return ret;
}
if (smb->termination_current) {
ret = current_to_hw(tc_tbl[id], ARRAY_SIZE(tc_tbl[id]),
smb->termination_current);
if (ret < 0)
return ret;
ret = regmap_update_bits(smb->regmap, CFG_CHARGE_CURRENT,
CFG_CHARGE_CURRENT_TC_MASK, ret);
if (ret < 0)
return ret;
}
return 0;
}
static int smb347_set_current_limits(struct smb347_charger *smb)
{
unsigned int id = smb->id;
int ret;
if (smb->mains_current_limit) {
ret = current_to_hw(icl_tbl[id], ARRAY_SIZE(icl_tbl[id]),
smb->mains_current_limit);
if (ret < 0)
return ret;
ret = regmap_update_bits(smb->regmap, CFG_CURRENT_LIMIT,
CFG_CURRENT_LIMIT_DC_MASK,
ret << CFG_CURRENT_LIMIT_DC_SHIFT);
if (ret < 0)
return ret;
}
if (smb->usb_hc_current_limit) {
ret = current_to_hw(icl_tbl[id], ARRAY_SIZE(icl_tbl[id]),
smb->usb_hc_current_limit);
if (ret < 0)
return ret;
ret = regmap_update_bits(smb->regmap, CFG_CURRENT_LIMIT,
CFG_CURRENT_LIMIT_USB_MASK, ret);
if (ret < 0)
return ret;
}
return 0;
}
static int smb347_set_voltage_limits(struct smb347_charger *smb)
{
int ret;
if (smb->pre_to_fast_voltage) {
ret = smb->pre_to_fast_voltage;
/* uV */
ret = clamp_val(ret, 2400000, 3000000) - 2400000;
ret /= 200000;
ret = regmap_update_bits(smb->regmap, CFG_FLOAT_VOLTAGE,
CFG_FLOAT_VOLTAGE_THRESHOLD_MASK,
ret << CFG_FLOAT_VOLTAGE_THRESHOLD_SHIFT);
if (ret < 0)
return ret;
}
if (smb->max_charge_voltage) {
ret = smb->max_charge_voltage;
/* uV */
ret = clamp_val(ret, 3500000, 4500000) - 3500000;
ret /= 20000;
ret = regmap_update_bits(smb->regmap, CFG_FLOAT_VOLTAGE,
CFG_FLOAT_VOLTAGE_FLOAT_MASK, ret);
if (ret < 0)
return ret;
}
return 0;
}
static int smb347_set_temp_limits(struct smb347_charger *smb)
{
unsigned int id = smb->id;
bool enable_therm_monitor = false;
int ret = 0;
int val;
if (smb->chip_temp_threshold) {
val = smb->chip_temp_threshold;
/* degree C */
val = clamp_val(val, 100, 130) - 100;
val /= 10;
ret = regmap_update_bits(smb->regmap, CFG_OTG,
CFG_OTG_TEMP_THRESHOLD_MASK,
val << CFG_OTG_TEMP_THRESHOLD_SHIFT);
if (ret < 0)
return ret;
}
if (smb->soft_cold_temp_limit != SMB3XX_TEMP_USE_DEFAULT) {
val = smb->soft_cold_temp_limit;
val = clamp_val(val, 0, 15);
val /= 5;
/* this goes from higher to lower so invert the value */
val = ~val & 0x3;
ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT,
CFG_TEMP_LIMIT_SOFT_COLD_MASK,
val << CFG_TEMP_LIMIT_SOFT_COLD_SHIFT);
if (ret < 0)
return ret;
enable_therm_monitor = true;
}
if (smb->soft_hot_temp_limit != SMB3XX_TEMP_USE_DEFAULT) {
val = smb->soft_hot_temp_limit;
val = clamp_val(val, 40, 55) - 40;
val /= 5;
ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT,
CFG_TEMP_LIMIT_SOFT_HOT_MASK,
val << CFG_TEMP_LIMIT_SOFT_HOT_SHIFT);
if (ret < 0)
return ret;
enable_therm_monitor = true;
}
if (smb->hard_cold_temp_limit != SMB3XX_TEMP_USE_DEFAULT) {
val = smb->hard_cold_temp_limit;
val = clamp_val(val, -5, 10) + 5;
val /= 5;
/* this goes from higher to lower so invert the value */
val = ~val & 0x3;
ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT,
CFG_TEMP_LIMIT_HARD_COLD_MASK,
val << CFG_TEMP_LIMIT_HARD_COLD_SHIFT);
if (ret < 0)
return ret;
enable_therm_monitor = true;
}
if (smb->hard_hot_temp_limit != SMB3XX_TEMP_USE_DEFAULT) {
val = smb->hard_hot_temp_limit;
val = clamp_val(val, 50, 65) - 50;
val /= 5;
ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT,
CFG_TEMP_LIMIT_HARD_HOT_MASK,
val << CFG_TEMP_LIMIT_HARD_HOT_SHIFT);
if (ret < 0)
return ret;
enable_therm_monitor = true;
}
/*
* If any of the temperature limits are set, we also enable the
* thermistor monitoring.
*
* When soft limits are hit, the device will start to compensate
* current and/or voltage depending on the configuration.
*
* When hard limit is hit, the device will suspend charging
* depending on the configuration.
*/
if (enable_therm_monitor) {
ret = regmap_update_bits(smb->regmap, CFG_THERM,
CFG_THERM_MONITOR_DISABLED, 0);
if (ret < 0)
return ret;
}
if (smb->suspend_on_hard_temp_limit) {
ret = regmap_update_bits(smb->regmap, CFG_SYSOK,
CFG_SYSOK_SUSPEND_HARD_LIMIT_DISABLED, 0);
if (ret < 0)
return ret;
}
if (smb->soft_temp_limit_compensation !=
SMB3XX_SOFT_TEMP_COMPENSATE_DEFAULT) {
val = smb->soft_temp_limit_compensation & 0x3;
ret = regmap_update_bits(smb->regmap, CFG_THERM,
CFG_THERM_SOFT_HOT_COMPENSATION_MASK,
val << CFG_THERM_SOFT_HOT_COMPENSATION_SHIFT);
if (ret < 0)
return ret;
ret = regmap_update_bits(smb->regmap, CFG_THERM,
CFG_THERM_SOFT_COLD_COMPENSATION_MASK,
val << CFG_THERM_SOFT_COLD_COMPENSATION_SHIFT);
if (ret < 0)
return ret;
}
if (smb->charge_current_compensation) {
val = current_to_hw(ccc_tbl[id], ARRAY_SIZE(ccc_tbl[id]),
smb->charge_current_compensation);
if (val < 0)
return val;
ret = regmap_update_bits(smb->regmap, CFG_OTG,
CFG_OTG_CC_COMPENSATION_MASK,
(val & 0x3) << CFG_OTG_CC_COMPENSATION_SHIFT);
if (ret < 0)
return ret;
}
return ret;
}
/*
* smb347_set_writable - enables/disables writing to non-volatile registers
* @smb: pointer to smb347 charger instance
*
* You can enable/disable writing to the non-volatile configuration
* registers by calling this function.
*
* Returns %0 on success and negative errno in case of failure.
*/
static int smb347_set_writable(struct smb347_charger *smb, bool writable,
bool irq_toggle)
{
struct i2c_client *client = to_i2c_client(smb->dev);
int ret;
if (writable && irq_toggle && !smb->irq_unsupported)
disable_irq(client->irq);
ret = regmap_update_bits(smb->regmap, CMD_A, CMD_A_ALLOW_WRITE,
writable ? CMD_A_ALLOW_WRITE : 0);
if ((!writable || ret) && irq_toggle && !smb->irq_unsupported)
enable_irq(client->irq);
return ret;
}
static int smb347_hw_init(struct smb347_charger *smb)
{
unsigned int val;
int ret;
ret = smb347_set_writable(smb, true, false);
if (ret < 0)
return ret;
/*
* Program the platform specific configuration values to the device
* first.
*/
ret = smb347_set_charge_current(smb);
if (ret < 0)
goto fail;
ret = smb347_set_current_limits(smb);
if (ret < 0)
goto fail;
ret = smb347_set_voltage_limits(smb);
if (ret < 0)
goto fail;
ret = smb347_set_temp_limits(smb);
if (ret < 0)
goto fail;
/* If USB charging is disabled we put the USB in suspend mode */
if (!smb->use_usb) {
ret = regmap_update_bits(smb->regmap, CMD_A,
CMD_A_SUSPEND_ENABLED,
CMD_A_SUSPEND_ENABLED);
if (ret < 0)
goto fail;
}
/*
* If configured by platform data, we enable hardware Auto-OTG
* support for driving VBUS. Otherwise we disable it.
*/
ret = regmap_update_bits(smb->regmap, CFG_OTHER, CFG_OTHER_RID_MASK,
smb->use_usb_otg ? CFG_OTHER_RID_ENABLED_AUTO_OTG : 0);
if (ret < 0)
goto fail;
/* Activate pin control, making it writable. */
switch (smb->enable_control) {
case SMB3XX_CHG_ENABLE_PIN_ACTIVE_LOW:
case SMB3XX_CHG_ENABLE_PIN_ACTIVE_HIGH:
ret = regmap_set_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_CTRL);
if (ret < 0)
goto fail;
}
/*
* Make the charging functionality controllable by a write to the
* command register unless pin control is specified in the platform
* data.
*/
switch (smb->enable_control) {
case SMB3XX_CHG_ENABLE_PIN_ACTIVE_LOW:
val = CFG_PIN_EN_CTRL_ACTIVE_LOW;
break;
case SMB3XX_CHG_ENABLE_PIN_ACTIVE_HIGH:
val = CFG_PIN_EN_CTRL_ACTIVE_HIGH;
break;
default:
val = 0;
break;
}
ret = regmap_update_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_CTRL_MASK,
val);
if (ret < 0)
goto fail;
/* Disable Automatic Power Source Detection (APSD) interrupt. */
ret = regmap_update_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_APSD_IRQ, 0);
if (ret < 0)
goto fail;
ret = smb347_update_ps_status(smb);
if (ret < 0)
goto fail;
ret = smb347_start_stop_charging(smb);
fail:
smb347_set_writable(smb, false, false);
return ret;
}
static irqreturn_t smb347_interrupt(int irq, void *data)
{
struct smb347_charger *smb = data;
unsigned int stat_c, irqstat_c, irqstat_d, irqstat_e;
bool handled = false;
int ret;
/* SMB347 it needs at least 20ms for setting IRQSTAT_E_*IN_UV_IRQ */
usleep_range(25000, 35000);
ret = regmap_read(smb->regmap, STAT_C, &stat_c);
if (ret < 0) {
dev_warn(smb->dev, "reading STAT_C failed\n");
return IRQ_NONE;
}
ret = regmap_read(smb->regmap, IRQSTAT_C, &irqstat_c);
if (ret < 0) {
dev_warn(smb->dev, "reading IRQSTAT_C failed\n");
return IRQ_NONE;
}
ret = regmap_read(smb->regmap, IRQSTAT_D, &irqstat_d);
if (ret < 0) {
dev_warn(smb->dev, "reading IRQSTAT_D failed\n");
return IRQ_NONE;
}
ret = regmap_read(smb->regmap, IRQSTAT_E, &irqstat_e);
if (ret < 0) {
dev_warn(smb->dev, "reading IRQSTAT_E failed\n");
return IRQ_NONE;
}
/*
* If we get charger error we report the error back to user.
* If the error is recovered charging will resume again.
*/
if (stat_c & STAT_C_CHARGER_ERROR) {
dev_err(smb->dev, "charging stopped due to charger error\n");
if (smb->use_mains)
power_supply_changed(smb->mains);
if (smb->use_usb)
power_supply_changed(smb->usb);
handled = true;
}
/*
* If we reached the termination current the battery is charged and
* we can update the status now. Charging is automatically
* disabled by the hardware.
*/
if (irqstat_c & (IRQSTAT_C_TERMINATION_IRQ | IRQSTAT_C_TAPER_IRQ)) {
if (irqstat_c & IRQSTAT_C_TERMINATION_STAT) {
if (smb->use_mains)
power_supply_changed(smb->mains);
if (smb->use_usb)
power_supply_changed(smb->usb);
}
dev_dbg(smb->dev, "going to HW maintenance mode\n");
handled = true;
}
/*
* If we got a charger timeout INT that means the charge
* full is not detected with in charge timeout value.
*/
if (irqstat_d & IRQSTAT_D_CHARGE_TIMEOUT_IRQ) {
dev_dbg(smb->dev, "total Charge Timeout INT received\n");
if (irqstat_d & IRQSTAT_D_CHARGE_TIMEOUT_STAT)
dev_warn(smb->dev, "charging stopped due to timeout\n");
if (smb->use_mains)
power_supply_changed(smb->mains);
if (smb->use_usb)
power_supply_changed(smb->usb);
handled = true;
}
/*
* If we got an under voltage interrupt it means that AC/USB input
* was connected or disconnected.
*/
if (irqstat_e & (IRQSTAT_E_USBIN_UV_IRQ | IRQSTAT_E_DCIN_UV_IRQ)) {
if (smb347_update_ps_status(smb) > 0) {
smb347_start_stop_charging(smb);
if (smb->use_mains)
power_supply_changed(smb->mains);
if (smb->use_usb)
power_supply_changed(smb->usb);
}
handled = true;
}
return handled ? IRQ_HANDLED : IRQ_NONE;
}
static int smb347_irq_set(struct smb347_charger *smb, bool enable)
{
int ret;
if (smb->irq_unsupported)
return 0;
ret = smb347_set_writable(smb, true, true);
if (ret < 0)
return ret;
/*
* Enable/disable interrupts for:
* - under voltage
* - termination current reached
* - charger timeout
* - charger error
*/
ret = regmap_update_bits(smb->regmap, CFG_FAULT_IRQ, 0xff,
enable ? CFG_FAULT_IRQ_DCIN_UV : 0);
if (ret < 0)
goto fail;
ret = regmap_update_bits(smb->regmap, CFG_STATUS_IRQ, 0xff,
enable ? (CFG_STATUS_IRQ_TERMINATION_OR_TAPER |
CFG_STATUS_IRQ_CHARGE_TIMEOUT) : 0);
if (ret < 0)
goto fail;
ret = regmap_update_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_CHARGER_ERROR,
enable ? CFG_PIN_EN_CHARGER_ERROR : 0);
fail:
smb347_set_writable(smb, false, true);
return ret;
}
static inline int smb347_irq_enable(struct smb347_charger *smb)
{
return smb347_irq_set(smb, true);
}
static inline int smb347_irq_disable(struct smb347_charger *smb)
{
return smb347_irq_set(smb, false);
}
static int smb347_irq_init(struct smb347_charger *smb,
struct i2c_client *client)
{
int ret;
smb->irq_unsupported = true;
/*
* Interrupt pin is optional. If it is connected, we setup the
* interrupt support here.
*/
if (!client->irq)
return 0;
ret = smb347_set_writable(smb, true, false);
if (ret < 0)
return ret;
/*
* Configure the STAT output to be suitable for interrupts: disable
* all other output (except interrupts) and make it active low.
*/
ret = regmap_update_bits(smb->regmap, CFG_STAT,
CFG_STAT_ACTIVE_HIGH | CFG_STAT_DISABLED,
CFG_STAT_DISABLED);
smb347_set_writable(smb, false, false);
if (ret < 0) {
dev_warn(smb->dev, "failed to initialize IRQ: %d\n", ret);
dev_warn(smb->dev, "disabling IRQ support\n");
return 0;
}
ret = devm_request_threaded_irq(smb->dev, client->irq, NULL,
smb347_interrupt, IRQF_ONESHOT,
client->name, smb);
if (ret)
return ret;
smb->irq_unsupported = false;
ret = smb347_irq_enable(smb);
if (ret < 0)
return ret;
return 0;
}
/*
* Returns the constant charge current programmed
* into the charger in uA.
*/
static int get_const_charge_current(struct smb347_charger *smb)
{
unsigned int id = smb->id;
int ret, intval;
unsigned int v;
if (!smb347_is_ps_online(smb))
return -ENODATA;
ret = regmap_read(smb->regmap, STAT_B, &v);
if (ret < 0)
return ret;
/*
* The current value is composition of FCC and PCC values
* and we can detect which table to use from bit 5.
*/
if (v & 0x20) {
intval = hw_to_current(fcc_tbl[id],
ARRAY_SIZE(fcc_tbl[id]), v & 7);
} else {
v >>= 3;
intval = hw_to_current(pcc_tbl[id],
ARRAY_SIZE(pcc_tbl[id]), v & 7);
}
return intval;
}
/*
* Returns the constant charge voltage programmed
* into the charger in uV.
*/
static int get_const_charge_voltage(struct smb347_charger *smb)
{
int ret, intval;
unsigned int v;
if (!smb347_is_ps_online(smb))
return -ENODATA;
ret = regmap_read(smb->regmap, STAT_A, &v);
if (ret < 0)
return ret;
v &= STAT_A_FLOAT_VOLTAGE_MASK;
if (v > 0x3d)
v = 0x3d;
intval = 3500000 + v * 20000;
return intval;
}
static int smb347_get_charging_status(struct smb347_charger *smb,
struct power_supply *psy)
{
int ret, status;
unsigned int val;
if (psy->desc->type == POWER_SUPPLY_TYPE_USB) {
if (!smb->usb_online)
return POWER_SUPPLY_STATUS_DISCHARGING;
} else {
if (!smb->mains_online)
return POWER_SUPPLY_STATUS_DISCHARGING;
}
ret = regmap_read(smb->regmap, STAT_C, &val);
if (ret < 0)
return ret;
if ((val & STAT_C_CHARGER_ERROR) ||
(val & STAT_C_HOLDOFF_STAT)) {
/*
* set to NOT CHARGING upon charger error
* or charging has stopped.
*/
status = POWER_SUPPLY_STATUS_NOT_CHARGING;
} else {
if ((val & STAT_C_CHG_MASK) >> STAT_C_CHG_SHIFT) {
/*
* set to charging if battery is in pre-charge,
* fast charge or taper charging mode.
*/
status = POWER_SUPPLY_STATUS_CHARGING;
} else if (val & STAT_C_CHG_TERM) {
/*
* set the status to FULL if battery is not in pre
* charge, fast charge or taper charging mode AND
* charging is terminated at least once.
*/
status = POWER_SUPPLY_STATUS_FULL;
} else {
/*
* in this case no charger error or termination
* occured but charging is not in progress!!!
*/
status = POWER_SUPPLY_STATUS_NOT_CHARGING;
}
}
return status;
}
static int smb347_get_property_locked(struct power_supply *psy,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct smb347_charger *smb = power_supply_get_drvdata(psy);
int ret;
switch (prop) {
case POWER_SUPPLY_PROP_STATUS:
ret = smb347_get_charging_status(smb, psy);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
if (psy->desc->type == POWER_SUPPLY_TYPE_USB) {
if (!smb->usb_online)
return -ENODATA;
} else {
if (!smb->mains_online)
return -ENODATA;
}
/*
* We handle trickle and pre-charging the same, and taper
* and none the same.
*/
switch (smb347_charging_status(smb)) {
case 1:
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
case 2:
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
default:
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
}
break;
case POWER_SUPPLY_PROP_ONLINE:
if (psy->desc->type == POWER_SUPPLY_TYPE_USB)
val->intval = smb->usb_online;
else
val->intval = smb->mains_online;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = get_const_charge_voltage(smb);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = get_const_charge_current(smb);
if (ret < 0)
return ret;
val->intval = ret;
break;
default:
return -EINVAL;
}
return 0;
}
static int smb347_get_property(struct power_supply *psy,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct smb347_charger *smb = power_supply_get_drvdata(psy);
struct i2c_client *client = to_i2c_client(smb->dev);
int ret;
if (!smb->irq_unsupported)
disable_irq(client->irq);
ret = smb347_get_property_locked(psy, prop, val);
if (!smb->irq_unsupported)
enable_irq(client->irq);
return ret;
}
static enum power_supply_property smb347_properties[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
};
static bool smb347_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case IRQSTAT_A:
case IRQSTAT_C:
case IRQSTAT_D:
case IRQSTAT_E:
case IRQSTAT_F:
case STAT_A:
case STAT_B:
case STAT_C:
case STAT_E:
return true;
}
return false;
}
static bool smb347_readable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case CFG_CHARGE_CURRENT:
case CFG_CURRENT_LIMIT:
case CFG_FLOAT_VOLTAGE:
case CFG_STAT:
case CFG_PIN:
case CFG_THERM:
case CFG_SYSOK:
case CFG_OTHER:
case CFG_OTG:
case CFG_TEMP_LIMIT:
case CFG_FAULT_IRQ:
case CFG_STATUS_IRQ:
case CFG_ADDRESS:
case CMD_A:
case CMD_B:
case CMD_C:
return true;
}
return smb347_volatile_reg(dev, reg);
}
static void smb347_dt_parse_dev_info(struct smb347_charger *smb)
{
struct device *dev = smb->dev;
smb->soft_temp_limit_compensation =
SMB3XX_SOFT_TEMP_COMPENSATE_DEFAULT;
/*
* These properties come from the battery info, still we need to
* pre-initialize the values. See smb347_get_battery_info() below.
*/
smb->soft_cold_temp_limit = SMB3XX_TEMP_USE_DEFAULT;
smb->hard_cold_temp_limit = SMB3XX_TEMP_USE_DEFAULT;
smb->soft_hot_temp_limit = SMB3XX_TEMP_USE_DEFAULT;
smb->hard_hot_temp_limit = SMB3XX_TEMP_USE_DEFAULT;
/* Charging constraints */
device_property_read_u32(dev, "summit,fast-voltage-threshold-microvolt",
&smb->pre_to_fast_voltage);
device_property_read_u32(dev, "summit,mains-current-limit-microamp",
&smb->mains_current_limit);
device_property_read_u32(dev, "summit,usb-current-limit-microamp",
&smb->usb_hc_current_limit);
/* For thermometer monitoring */
device_property_read_u32(dev, "summit,chip-temperature-threshold-celsius",
&smb->chip_temp_threshold);
device_property_read_u32(dev, "summit,soft-compensation-method",
&smb->soft_temp_limit_compensation);
device_property_read_u32(dev, "summit,charge-current-compensation-microamp",
&smb->charge_current_compensation);
/* Supported charging mode */
smb->use_mains = device_property_read_bool(dev, "summit,enable-mains-charging");
smb->use_usb = device_property_read_bool(dev, "summit,enable-usb-charging");
smb->use_usb_otg = device_property_read_bool(dev, "summit,enable-otg-charging");
/* Select charging control */
device_property_read_u32(dev, "summit,enable-charge-control",
&smb->enable_control);
/*
* Polarity of INOK signal indicating presence of external power
* supply connected to the charger.
*/
device_property_read_u32(dev, "summit,inok-polarity",
&smb->inok_polarity);
}
static int smb347_get_battery_info(struct smb347_charger *smb)
{
struct power_supply_battery_info *info;
struct power_supply *supply;
int err;
if (smb->mains)
supply = smb->mains;
else
supply = smb->usb;
err = power_supply_get_battery_info(supply, &info);
if (err == -ENXIO || err == -ENODEV)
return 0;
if (err)
return err;
if (info->constant_charge_current_max_ua != -EINVAL)
smb->max_charge_current = info->constant_charge_current_max_ua;
if (info->constant_charge_voltage_max_uv != -EINVAL)
smb->max_charge_voltage = info->constant_charge_voltage_max_uv;
if (info->precharge_current_ua != -EINVAL)
smb->pre_charge_current = info->precharge_current_ua;
if (info->charge_term_current_ua != -EINVAL)
smb->termination_current = info->charge_term_current_ua;
if (info->temp_alert_min != INT_MIN)
smb->soft_cold_temp_limit = info->temp_alert_min;
if (info->temp_alert_max != INT_MAX)
smb->soft_hot_temp_limit = info->temp_alert_max;
if (info->temp_min != INT_MIN)
smb->hard_cold_temp_limit = info->temp_min;
if (info->temp_max != INT_MAX)
smb->hard_hot_temp_limit = info->temp_max;
/* Suspend when battery temperature is outside hard limits */
if (smb->hard_cold_temp_limit != SMB3XX_TEMP_USE_DEFAULT ||
smb->hard_hot_temp_limit != SMB3XX_TEMP_USE_DEFAULT)
smb->suspend_on_hard_temp_limit = true;
return 0;
}
static int smb347_usb_vbus_get_current_limit(struct regulator_dev *rdev)
{
struct smb347_charger *smb = rdev_get_drvdata(rdev);
unsigned int val;
int ret;
ret = regmap_read(smb->regmap, CFG_OTG, &val);
if (ret < 0)
return ret;
/*
* It's unknown what happens if this bit is unset due to lack of
* access to the datasheet, assume it's limit-enable.
*/
if (!(val & CFG_OTG_CURRENT_LIMIT_250mA))
return 0;
return val & CFG_OTG_CURRENT_LIMIT_750mA ? 750000 : 250000;
}
static int smb347_usb_vbus_set_new_current_limit(struct smb347_charger *smb,
int max_uA)
{
const unsigned int mask = CFG_OTG_CURRENT_LIMIT_750mA |
CFG_OTG_CURRENT_LIMIT_250mA;
unsigned int val = CFG_OTG_CURRENT_LIMIT_250mA;
int ret;
if (max_uA >= 750000)
val |= CFG_OTG_CURRENT_LIMIT_750mA;
ret = regmap_update_bits(smb->regmap, CFG_OTG, mask, val);
if (ret < 0)
dev_err(smb->dev, "failed to change USB current limit\n");
return ret;
}
static int smb347_usb_vbus_set_current_limit(struct regulator_dev *rdev,
int min_uA, int max_uA)
{
struct smb347_charger *smb = rdev_get_drvdata(rdev);
int ret;
ret = smb347_set_writable(smb, true, true);
if (ret < 0)
return ret;
ret = smb347_usb_vbus_set_new_current_limit(smb, max_uA);
smb347_set_writable(smb, false, true);
return ret;
}
static int smb347_usb_vbus_regulator_enable(struct regulator_dev *rdev)
{
struct smb347_charger *smb = rdev_get_drvdata(rdev);
int ret, max_uA;
ret = smb347_set_writable(smb, true, true);
if (ret < 0)
return ret;
smb347_charging_disable(smb);
if (device_property_read_bool(&rdev->dev, "summit,needs-inok-toggle")) {
unsigned int sysok = 0;
if (smb->inok_polarity == SMB3XX_SYSOK_INOK_ACTIVE_LOW)
sysok = CFG_SYSOK_INOK_ACTIVE_HIGH;
/*
* VBUS won't be powered if INOK is active, so we need to
* manually disable INOK on some platforms.
*/
ret = regmap_update_bits(smb->regmap, CFG_SYSOK,
CFG_SYSOK_INOK_ACTIVE_HIGH, sysok);
if (ret < 0) {
dev_err(smb->dev, "failed to disable INOK\n");
goto done;
}
}
ret = smb347_usb_vbus_get_current_limit(rdev);
if (ret < 0) {
dev_err(smb->dev, "failed to get USB VBUS current limit\n");
goto done;
}
max_uA = ret;
ret = smb347_usb_vbus_set_new_current_limit(smb, 250000);
if (ret < 0) {
dev_err(smb->dev, "failed to preset USB VBUS current limit\n");
goto done;
}
ret = regmap_set_bits(smb->regmap, CMD_A, CMD_A_OTG_ENABLED);
if (ret < 0) {
dev_err(smb->dev, "failed to enable USB VBUS\n");
goto done;
}
smb->usb_vbus_enabled = true;
ret = smb347_usb_vbus_set_new_current_limit(smb, max_uA);
if (ret < 0) {
dev_err(smb->dev, "failed to restore USB VBUS current limit\n");
goto done;
}
done:
smb347_set_writable(smb, false, true);
return ret;
}
static int smb347_usb_vbus_regulator_disable(struct regulator_dev *rdev)
{
struct smb347_charger *smb = rdev_get_drvdata(rdev);
int ret;
ret = smb347_set_writable(smb, true, true);
if (ret < 0)
return ret;
ret = regmap_clear_bits(smb->regmap, CMD_A, CMD_A_OTG_ENABLED);
if (ret < 0) {
dev_err(smb->dev, "failed to disable USB VBUS\n");
goto done;
}
smb->usb_vbus_enabled = false;
if (device_property_read_bool(&rdev->dev, "summit,needs-inok-toggle")) {
unsigned int sysok = 0;
if (smb->inok_polarity == SMB3XX_SYSOK_INOK_ACTIVE_HIGH)
sysok = CFG_SYSOK_INOK_ACTIVE_HIGH;
ret = regmap_update_bits(smb->regmap, CFG_SYSOK,
CFG_SYSOK_INOK_ACTIVE_HIGH, sysok);
if (ret < 0) {
dev_err(smb->dev, "failed to enable INOK\n");
goto done;
}
}
smb347_start_stop_charging(smb);
done:
smb347_set_writable(smb, false, true);
return ret;
}
static const struct regmap_config smb347_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = SMB347_MAX_REGISTER,
.volatile_reg = smb347_volatile_reg,
.readable_reg = smb347_readable_reg,
.cache_type = REGCACHE_RBTREE,
};
static const struct regulator_ops smb347_usb_vbus_regulator_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = smb347_usb_vbus_regulator_enable,
.disable = smb347_usb_vbus_regulator_disable,
.get_current_limit = smb347_usb_vbus_get_current_limit,
.set_current_limit = smb347_usb_vbus_set_current_limit,
};
static const struct power_supply_desc smb347_mains_desc = {
.name = "smb347-mains",
.type = POWER_SUPPLY_TYPE_MAINS,
.get_property = smb347_get_property,
.properties = smb347_properties,
.num_properties = ARRAY_SIZE(smb347_properties),
};
static const struct power_supply_desc smb347_usb_desc = {
.name = "smb347-usb",
.type = POWER_SUPPLY_TYPE_USB,
.get_property = smb347_get_property,
.properties = smb347_properties,
.num_properties = ARRAY_SIZE(smb347_properties),
};
static const struct regulator_desc smb347_usb_vbus_regulator_desc = {
.name = "smb347-usb-vbus",
.of_match = of_match_ptr("usb-vbus"),
.ops = &smb347_usb_vbus_regulator_ops,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.enable_reg = CMD_A,
.enable_mask = CMD_A_OTG_ENABLED,
.enable_val = CMD_A_OTG_ENABLED,
.fixed_uV = 5000000,
.n_voltages = 1,
};
static int smb347_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct power_supply_config mains_usb_cfg = {};
struct regulator_config usb_rdev_cfg = {};
struct device *dev = &client->dev;
struct smb347_charger *smb;
int ret;
smb = devm_kzalloc(dev, sizeof(*smb), GFP_KERNEL);
if (!smb)
return -ENOMEM;
smb->dev = &client->dev;
smb->id = id->driver_data;
i2c_set_clientdata(client, smb);
smb347_dt_parse_dev_info(smb);
if (!smb->use_mains && !smb->use_usb)
return -EINVAL;
smb->regmap = devm_regmap_init_i2c(client, &smb347_regmap);
if (IS_ERR(smb->regmap))
return PTR_ERR(smb->regmap);
mains_usb_cfg.drv_data = smb;
mains_usb_cfg.of_node = dev->of_node;
if (smb->use_mains) {
smb->mains = devm_power_supply_register(dev, &smb347_mains_desc,
&mains_usb_cfg);
if (IS_ERR(smb->mains))
return PTR_ERR(smb->mains);
}
if (smb->use_usb) {
smb->usb = devm_power_supply_register(dev, &smb347_usb_desc,
&mains_usb_cfg);
if (IS_ERR(smb->usb))
return PTR_ERR(smb->usb);
}
ret = smb347_get_battery_info(smb);
if (ret)
return ret;
ret = smb347_hw_init(smb);
if (ret < 0)
return ret;
ret = smb347_irq_init(smb, client);
if (ret)
return ret;
usb_rdev_cfg.dev = dev;
usb_rdev_cfg.driver_data = smb;
usb_rdev_cfg.regmap = smb->regmap;
smb->usb_rdev = devm_regulator_register(dev,
&smb347_usb_vbus_regulator_desc,
&usb_rdev_cfg);
if (IS_ERR(smb->usb_rdev)) {
smb347_irq_disable(smb);
return PTR_ERR(smb->usb_rdev);
}
return 0;
}
static void smb347_remove(struct i2c_client *client)
{
struct smb347_charger *smb = i2c_get_clientdata(client);
smb347_usb_vbus_regulator_disable(smb->usb_rdev);
smb347_irq_disable(smb);
}
static void smb347_shutdown(struct i2c_client *client)
{
smb347_remove(client);
}
static const struct i2c_device_id smb347_id[] = {
{ "smb345", SMB345 },
{ "smb347", SMB347 },
{ "smb358", SMB358 },
{ },
};
MODULE_DEVICE_TABLE(i2c, smb347_id);
static const struct of_device_id smb3xx_of_match[] = {
{ .compatible = "summit,smb345" },
{ .compatible = "summit,smb347" },
{ .compatible = "summit,smb358" },
{ },
};
MODULE_DEVICE_TABLE(of, smb3xx_of_match);
static struct i2c_driver smb347_driver = {
.driver = {
.name = "smb347",
.of_match_table = smb3xx_of_match,
},
.probe = smb347_probe,
.remove = smb347_remove,
.shutdown = smb347_shutdown,
.id_table = smb347_id,
};
module_i2c_driver(smb347_driver);
MODULE_AUTHOR("Bruce E. Robertson <[email protected]>");
MODULE_AUTHOR("Mika Westerberg <[email protected]>");
MODULE_DESCRIPTION("SMB347 battery charger driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/smb347-charger.c |
// SPDX-License-Identifier: GPL-2.0
// BQ256XX Battery Charger Driver
// Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/gpio/consumer.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/types.h>
#include <linux/usb/phy.h>
#include <linux/device.h>
#include <linux/moduleparam.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#define BQ256XX_MANUFACTURER "Texas Instruments"
#define BQ256XX_INPUT_CURRENT_LIMIT 0x00
#define BQ256XX_CHARGER_CONTROL_0 0x01
#define BQ256XX_CHARGE_CURRENT_LIMIT 0x02
#define BQ256XX_PRECHG_AND_TERM_CURR_LIM 0x03
#define BQ256XX_BATTERY_VOLTAGE_LIMIT 0x04
#define BQ256XX_CHARGER_CONTROL_1 0x05
#define BQ256XX_CHARGER_CONTROL_2 0x06
#define BQ256XX_CHARGER_CONTROL_3 0x07
#define BQ256XX_CHARGER_STATUS_0 0x08
#define BQ256XX_CHARGER_STATUS_1 0x09
#define BQ256XX_CHARGER_STATUS_2 0x0a
#define BQ256XX_PART_INFORMATION 0x0b
#define BQ256XX_CHARGER_CONTROL_4 0x0c
#define BQ256XX_IINDPM_MASK GENMASK(4, 0)
#define BQ256XX_IINDPM_STEP_uA 100000
#define BQ256XX_IINDPM_OFFSET_uA 100000
#define BQ256XX_IINDPM_MIN_uA 100000
#define BQ256XX_IINDPM_MAX_uA 3200000
#define BQ256XX_IINDPM_DEF_uA 2400000
#define BQ256XX_TS_IGNORE BIT(6)
#define BQ256XX_TS_IGNORE_SHIFT 6
#define BQ256XX_VINDPM_MASK GENMASK(3, 0)
#define BQ256XX_VINDPM_STEP_uV 100000
#define BQ256XX_VINDPM_OFFSET_uV 3900000
#define BQ256XX_VINDPM_MIN_uV 3900000
#define BQ256XX_VINDPM_MAX_uV 5400000
#define BQ256XX_VINDPM_DEF_uV 4500000
#define BQ256XX_VBATREG_MASK GENMASK(7, 3)
#define BQ2560X_VBATREG_STEP_uV 32000
#define BQ2560X_VBATREG_OFFSET_uV 3856000
#define BQ2560X_VBATREG_MIN_uV 3856000
#define BQ2560X_VBATREG_MAX_uV 4624000
#define BQ2560X_VBATREG_DEF_uV 4208000
#define BQ25601D_VBATREG_OFFSET_uV 3847000
#define BQ25601D_VBATREG_MIN_uV 3847000
#define BQ25601D_VBATREG_MAX_uV 4615000
#define BQ25601D_VBATREG_DEF_uV 4199000
#define BQ2561X_VBATREG_STEP_uV 10000
#define BQ25611D_VBATREG_MIN_uV 3494000
#define BQ25611D_VBATREG_MAX_uV 4510000
#define BQ25611D_VBATREG_DEF_uV 4190000
#define BQ25618_VBATREG_MIN_uV 3504000
#define BQ25618_VBATREG_MAX_uV 4500000
#define BQ25618_VBATREG_DEF_uV 4200000
#define BQ256XX_VBATREG_BIT_SHIFT 3
#define BQ2561X_VBATREG_THRESH 0x8
#define BQ25611D_VBATREG_THRESH_uV 4290000
#define BQ25618_VBATREG_THRESH_uV 4300000
#define BQ256XX_CHG_CONFIG_MASK BIT(4)
#define BQ256XX_CHG_CONFIG_BIT_SHIFT 4
#define BQ256XX_ITERM_MASK GENMASK(3, 0)
#define BQ256XX_ITERM_STEP_uA 60000
#define BQ256XX_ITERM_OFFSET_uA 60000
#define BQ256XX_ITERM_MIN_uA 60000
#define BQ256XX_ITERM_MAX_uA 780000
#define BQ256XX_ITERM_DEF_uA 180000
#define BQ25618_ITERM_STEP_uA 20000
#define BQ25618_ITERM_OFFSET_uA 20000
#define BQ25618_ITERM_MIN_uA 20000
#define BQ25618_ITERM_MAX_uA 260000
#define BQ25618_ITERM_DEF_uA 60000
#define BQ256XX_IPRECHG_MASK GENMASK(7, 4)
#define BQ256XX_IPRECHG_STEP_uA 60000
#define BQ256XX_IPRECHG_OFFSET_uA 60000
#define BQ256XX_IPRECHG_MIN_uA 60000
#define BQ256XX_IPRECHG_MAX_uA 780000
#define BQ256XX_IPRECHG_DEF_uA 180000
#define BQ25618_IPRECHG_STEP_uA 20000
#define BQ25618_IPRECHG_OFFSET_uA 20000
#define BQ25618_IPRECHG_MIN_uA 20000
#define BQ25618_IPRECHG_MAX_uA 260000
#define BQ25618_IPRECHG_DEF_uA 40000
#define BQ256XX_IPRECHG_BIT_SHIFT 4
#define BQ256XX_ICHG_MASK GENMASK(5, 0)
#define BQ256XX_ICHG_STEP_uA 60000
#define BQ256XX_ICHG_MIN_uA 0
#define BQ256XX_ICHG_MAX_uA 3000000
#define BQ2560X_ICHG_DEF_uA 2040000
#define BQ25611D_ICHG_DEF_uA 1020000
#define BQ25618_ICHG_STEP_uA 20000
#define BQ25618_ICHG_MIN_uA 0
#define BQ25618_ICHG_MAX_uA 1500000
#define BQ25618_ICHG_DEF_uA 340000
#define BQ25618_ICHG_THRESH 0x3c
#define BQ25618_ICHG_THRESH_uA 1180000
#define BQ256XX_VBUS_STAT_MASK GENMASK(7, 5)
#define BQ256XX_VBUS_STAT_NO_INPUT 0
#define BQ256XX_VBUS_STAT_USB_SDP BIT(5)
#define BQ256XX_VBUS_STAT_USB_CDP BIT(6)
#define BQ256XX_VBUS_STAT_USB_DCP (BIT(6) | BIT(5))
#define BQ256XX_VBUS_STAT_USB_OTG (BIT(7) | BIT(6) | BIT(5))
#define BQ256XX_CHRG_STAT_MASK GENMASK(4, 3)
#define BQ256XX_CHRG_STAT_NOT_CHRGING 0
#define BQ256XX_CHRG_STAT_PRECHRGING BIT(3)
#define BQ256XX_CHRG_STAT_FAST_CHRGING BIT(4)
#define BQ256XX_CHRG_STAT_CHRG_TERM (BIT(4) | BIT(3))
#define BQ256XX_PG_STAT_MASK BIT(2)
#define BQ256XX_WDT_FAULT_MASK BIT(7)
#define BQ256XX_CHRG_FAULT_MASK GENMASK(5, 4)
#define BQ256XX_CHRG_FAULT_NORMAL 0
#define BQ256XX_CHRG_FAULT_INPUT BIT(4)
#define BQ256XX_CHRG_FAULT_THERM BIT(5)
#define BQ256XX_CHRG_FAULT_CST_EXPIRE (BIT(5) | BIT(4))
#define BQ256XX_BAT_FAULT_MASK BIT(3)
#define BQ256XX_NTC_FAULT_MASK GENMASK(2, 0)
#define BQ256XX_NTC_FAULT_WARM BIT(1)
#define BQ256XX_NTC_FAULT_COOL (BIT(1) | BIT(0))
#define BQ256XX_NTC_FAULT_COLD (BIT(2) | BIT(0))
#define BQ256XX_NTC_FAULT_HOT (BIT(2) | BIT(1))
#define BQ256XX_NUM_WD_VAL 4
#define BQ256XX_WATCHDOG_MASK GENMASK(5, 4)
#define BQ256XX_WATCHDOG_MAX 1600000
#define BQ256XX_WATCHDOG_DIS 0
#define BQ256XX_WDT_BIT_SHIFT 4
#define BQ256XX_REG_RST BIT(7)
/**
* struct bq256xx_init_data -
* @ichg: fast charge current
* @iindpm: input current limit
* @vbatreg: charge voltage
* @iterm: termination current
* @iprechg: precharge current
* @vindpm: input voltage limit
* @ichg_max: maximum fast charge current
* @vbatreg_max: maximum charge voltage
* @ts_ignore: TS_IGNORE flag
*/
struct bq256xx_init_data {
u32 ichg;
u32 iindpm;
u32 vbatreg;
u32 iterm;
u32 iprechg;
u32 vindpm;
u32 ichg_max;
u32 vbatreg_max;
bool ts_ignore;
};
/**
* struct bq256xx_state -
* @vbus_stat: VBUS status according to BQ256XX_CHARGER_STATUS_0
* @chrg_stat: charging status according to BQ256XX_CHARGER_STATUS_0
* @online: PG status according to BQ256XX_CHARGER_STATUS_0
*
* @wdt_fault: watchdog fault according to BQ256XX_CHARGER_STATUS_1
* @bat_fault: battery fault according to BQ256XX_CHARGER_STATUS_1
* @chrg_fault: charging fault according to BQ256XX_CHARGER_STATUS_1
* @ntc_fault: TS fault according to BQ256XX_CHARGER_STATUS_1
*/
struct bq256xx_state {
u8 vbus_stat;
u8 chrg_stat;
bool online;
u8 wdt_fault;
u8 bat_fault;
u8 chrg_fault;
u8 ntc_fault;
};
enum bq256xx_id {
BQ25600,
BQ25600D,
BQ25601,
BQ25601D,
BQ25618,
BQ25619,
BQ25611D,
};
/**
* struct bq256xx_device -
* @client: i2c client structure
* @regmap: register map structure
* @dev: device structure
* @charger: power supply registered for the charger
* @battery: power supply registered for the battery
* @lock: mutex lock structure
*
* @usb2_phy: usb_phy identifier
* @usb3_phy: usb_phy identifier
* @usb_nb: notifier block
* @usb_work: usb work queue
* @usb_event: usb_event code
*
* @model_name: i2c name string
*
* @init_data: initialization data
* @chip_info: device variant information
* @state: device status and faults
* @watchdog_timer: watchdog timer value in milliseconds
*/
struct bq256xx_device {
struct i2c_client *client;
struct device *dev;
struct power_supply *charger;
struct power_supply *battery;
struct mutex lock;
struct regmap *regmap;
struct usb_phy *usb2_phy;
struct usb_phy *usb3_phy;
struct notifier_block usb_nb;
struct work_struct usb_work;
unsigned long usb_event;
char model_name[I2C_NAME_SIZE];
struct bq256xx_init_data init_data;
const struct bq256xx_chip_info *chip_info;
struct bq256xx_state state;
int watchdog_timer;
};
/**
* struct bq256xx_chip_info -
* @model_id: device instance
*
* @bq256xx_regmap_config: regmap configuration struct
* @bq256xx_get_ichg: pointer to instance specific get_ichg function
* @bq256xx_get_iindpm: pointer to instance specific get_iindpm function
* @bq256xx_get_vbatreg: pointer to instance specific get_vbatreg function
* @bq256xx_get_iterm: pointer to instance specific get_iterm function
* @bq256xx_get_iprechg: pointer to instance specific get_iprechg function
* @bq256xx_get_vindpm: pointer to instance specific get_vindpm function
*
* @bq256xx_set_ichg: pointer to instance specific set_ichg function
* @bq256xx_set_iindpm: pointer to instance specific set_iindpm function
* @bq256xx_set_vbatreg: pointer to instance specific set_vbatreg function
* @bq256xx_set_iterm: pointer to instance specific set_iterm function
* @bq256xx_set_iprechg: pointer to instance specific set_iprechg function
* @bq256xx_set_vindpm: pointer to instance specific set_vindpm function
* @bq256xx_set_charge_type: pointer to instance specific set_charge_type function
* @bq256xx_set_ts_ignore: pointer to instance specific set_ts_ignore function
*
* @bq256xx_def_ichg: default ichg value in microamps
* @bq256xx_def_iindpm: default iindpm value in microamps
* @bq256xx_def_vbatreg: default vbatreg value in microvolts
* @bq256xx_def_iterm: default iterm value in microamps
* @bq256xx_def_iprechg: default iprechg value in microamps
* @bq256xx_def_vindpm: default vindpm value in microvolts
*
* @bq256xx_max_ichg: maximum charge current in microamps
* @bq256xx_max_vbatreg: maximum battery regulation voltage in microvolts
*
* @has_usb_detect: indicates whether device has BC1.2 detection
*/
struct bq256xx_chip_info {
int model_id;
const struct regmap_config *bq256xx_regmap_config;
int (*bq256xx_get_ichg)(struct bq256xx_device *bq);
int (*bq256xx_get_iindpm)(struct bq256xx_device *bq);
int (*bq256xx_get_vbatreg)(struct bq256xx_device *bq);
int (*bq256xx_get_iterm)(struct bq256xx_device *bq);
int (*bq256xx_get_iprechg)(struct bq256xx_device *bq);
int (*bq256xx_get_vindpm)(struct bq256xx_device *bq);
int (*bq256xx_set_ichg)(struct bq256xx_device *bq, int ichg);
int (*bq256xx_set_iindpm)(struct bq256xx_device *bq, int iindpm);
int (*bq256xx_set_vbatreg)(struct bq256xx_device *bq, int vbatreg);
int (*bq256xx_set_iterm)(struct bq256xx_device *bq, int iterm);
int (*bq256xx_set_iprechg)(struct bq256xx_device *bq, int iprechg);
int (*bq256xx_set_vindpm)(struct bq256xx_device *bq, int vindpm);
int (*bq256xx_set_charge_type)(struct bq256xx_device *bq, int type);
int (*bq256xx_set_ts_ignore)(struct bq256xx_device *bq, bool ts_ignore);
int bq256xx_def_ichg;
int bq256xx_def_iindpm;
int bq256xx_def_vbatreg;
int bq256xx_def_iterm;
int bq256xx_def_iprechg;
int bq256xx_def_vindpm;
int bq256xx_max_ichg;
int bq256xx_max_vbatreg;
bool has_usb_detect;
};
static int bq256xx_watchdog_time[BQ256XX_NUM_WD_VAL] = {
0, 40000, 80000, 1600000
};
static const int bq25611d_vbatreg_values[] = {
3494000, 3590000, 3686000, 3790000, 3894000, 3990000, 4090000, 4140000,
4190000
};
static const int bq25618_619_vbatreg_values[] = {
3504000, 3600000, 3696000, 3800000, 3904000, 4000000, 4100000, 4150000,
4200000
};
static const int bq25618_619_ichg_values[] = {
1290000, 1360000, 1430000, 1500000
};
static enum power_supply_usb_type bq256xx_usb_type[] = {
POWER_SUPPLY_USB_TYPE_SDP,
POWER_SUPPLY_USB_TYPE_CDP,
POWER_SUPPLY_USB_TYPE_DCP,
POWER_SUPPLY_USB_TYPE_UNKNOWN,
POWER_SUPPLY_USB_TYPE_ACA,
};
static int bq256xx_array_parse(int array_size, int val, const int array[])
{
int i = 0;
if (val < array[i])
return i - 1;
if (val >= array[array_size - 1])
return array_size - 1;
for (i = 1; i < array_size; i++) {
if (val == array[i])
return i;
if (val > array[i - 1] && val < array[i]) {
if (val < array[i])
return i - 1;
else
return i;
}
}
return -EINVAL;
}
static int bq256xx_usb_notifier(struct notifier_block *nb, unsigned long val,
void *priv)
{
struct bq256xx_device *bq =
container_of(nb, struct bq256xx_device, usb_nb);
bq->usb_event = val;
queue_work(system_power_efficient_wq, &bq->usb_work);
return NOTIFY_OK;
}
static void bq256xx_usb_work(struct work_struct *data)
{
struct bq256xx_device *bq =
container_of(data, struct bq256xx_device, usb_work);
switch (bq->usb_event) {
case USB_EVENT_ID:
break;
case USB_EVENT_NONE:
power_supply_changed(bq->charger);
break;
default:
dev_err(bq->dev, "Error switching to charger mode.\n");
break;
}
}
static struct reg_default bq2560x_reg_defs[] = {
{BQ256XX_INPUT_CURRENT_LIMIT, 0x17},
{BQ256XX_CHARGER_CONTROL_0, 0x1a},
{BQ256XX_CHARGE_CURRENT_LIMIT, 0xa2},
{BQ256XX_PRECHG_AND_TERM_CURR_LIM, 0x22},
{BQ256XX_BATTERY_VOLTAGE_LIMIT, 0x58},
{BQ256XX_CHARGER_CONTROL_1, 0x9f},
{BQ256XX_CHARGER_CONTROL_2, 0x66},
{BQ256XX_CHARGER_CONTROL_3, 0x4c},
};
static struct reg_default bq25611d_reg_defs[] = {
{BQ256XX_INPUT_CURRENT_LIMIT, 0x17},
{BQ256XX_CHARGER_CONTROL_0, 0x1a},
{BQ256XX_CHARGE_CURRENT_LIMIT, 0x91},
{BQ256XX_PRECHG_AND_TERM_CURR_LIM, 0x12},
{BQ256XX_BATTERY_VOLTAGE_LIMIT, 0x40},
{BQ256XX_CHARGER_CONTROL_1, 0x9e},
{BQ256XX_CHARGER_CONTROL_2, 0xe6},
{BQ256XX_CHARGER_CONTROL_3, 0x4c},
{BQ256XX_PART_INFORMATION, 0x54},
{BQ256XX_CHARGER_CONTROL_4, 0x75},
};
static struct reg_default bq25618_619_reg_defs[] = {
{BQ256XX_INPUT_CURRENT_LIMIT, 0x17},
{BQ256XX_CHARGER_CONTROL_0, 0x1a},
{BQ256XX_CHARGE_CURRENT_LIMIT, 0x91},
{BQ256XX_PRECHG_AND_TERM_CURR_LIM, 0x12},
{BQ256XX_BATTERY_VOLTAGE_LIMIT, 0x40},
{BQ256XX_CHARGER_CONTROL_1, 0x9e},
{BQ256XX_CHARGER_CONTROL_2, 0xe6},
{BQ256XX_CHARGER_CONTROL_3, 0x4c},
{BQ256XX_PART_INFORMATION, 0x2c},
{BQ256XX_CHARGER_CONTROL_4, 0x75},
};
static int bq256xx_get_state(struct bq256xx_device *bq,
struct bq256xx_state *state)
{
unsigned int charger_status_0;
unsigned int charger_status_1;
int ret;
ret = regmap_read(bq->regmap, BQ256XX_CHARGER_STATUS_0,
&charger_status_0);
if (ret)
return ret;
ret = regmap_read(bq->regmap, BQ256XX_CHARGER_STATUS_1,
&charger_status_1);
if (ret)
return ret;
state->vbus_stat = charger_status_0 & BQ256XX_VBUS_STAT_MASK;
state->chrg_stat = charger_status_0 & BQ256XX_CHRG_STAT_MASK;
state->online = charger_status_0 & BQ256XX_PG_STAT_MASK;
state->wdt_fault = charger_status_1 & BQ256XX_WDT_FAULT_MASK;
state->bat_fault = charger_status_1 & BQ256XX_BAT_FAULT_MASK;
state->chrg_fault = charger_status_1 & BQ256XX_CHRG_FAULT_MASK;
state->ntc_fault = charger_status_1 & BQ256XX_NTC_FAULT_MASK;
return 0;
}
static int bq256xx_set_charge_type(struct bq256xx_device *bq, int type)
{
int chg_config = 0;
switch (type) {
case POWER_SUPPLY_CHARGE_TYPE_NONE:
chg_config = 0x0;
break;
case POWER_SUPPLY_CHARGE_TYPE_TRICKLE:
case POWER_SUPPLY_CHARGE_TYPE_FAST:
chg_config = 0x1;
break;
default:
return -EINVAL;
}
return regmap_update_bits(bq->regmap, BQ256XX_CHARGER_CONTROL_0,
BQ256XX_CHG_CONFIG_MASK,
(chg_config ? 1 : 0) << BQ256XX_CHG_CONFIG_BIT_SHIFT);
}
static int bq256xx_get_ichg_curr(struct bq256xx_device *bq)
{
unsigned int charge_current_limit;
unsigned int ichg_reg_code;
int ret;
ret = regmap_read(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
&charge_current_limit);
if (ret)
return ret;
ichg_reg_code = charge_current_limit & BQ256XX_ICHG_MASK;
return ichg_reg_code * BQ256XX_ICHG_STEP_uA;
}
static int bq25618_619_get_ichg_curr(struct bq256xx_device *bq)
{
unsigned int charge_current_limit;
unsigned int ichg_reg_code;
int ret;
ret = regmap_read(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
&charge_current_limit);
if (ret)
return ret;
ichg_reg_code = charge_current_limit & BQ256XX_ICHG_MASK;
if (ichg_reg_code < BQ25618_ICHG_THRESH)
return ichg_reg_code * BQ25618_ICHG_STEP_uA;
return bq25618_619_ichg_values[ichg_reg_code - BQ25618_ICHG_THRESH];
}
static int bq256xx_set_ichg_curr(struct bq256xx_device *bq, int ichg)
{
unsigned int ichg_reg_code;
int ichg_max = bq->init_data.ichg_max;
ichg = clamp(ichg, BQ256XX_ICHG_MIN_uA, ichg_max);
ichg_reg_code = ichg / BQ256XX_ICHG_STEP_uA;
return regmap_update_bits(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
BQ256XX_ICHG_MASK, ichg_reg_code);
}
static int bq25618_619_set_ichg_curr(struct bq256xx_device *bq, int ichg)
{
int array_size = ARRAY_SIZE(bq25618_619_ichg_values);
unsigned int ichg_reg_code;
int ichg_max = bq->init_data.ichg_max;
ichg = clamp(ichg, BQ25618_ICHG_MIN_uA, ichg_max);
if (ichg <= BQ25618_ICHG_THRESH_uA) {
ichg_reg_code = ichg / BQ25618_ICHG_STEP_uA;
} else {
ichg_reg_code = bq256xx_array_parse(array_size, ichg,
bq25618_619_ichg_values) + BQ25618_ICHG_THRESH;
}
return regmap_update_bits(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
BQ256XX_ICHG_MASK, ichg_reg_code);
}
static int bq25618_619_get_chrg_volt(struct bq256xx_device *bq)
{
unsigned int battery_volt_lim;
unsigned int vbatreg_reg_code;
int ret;
ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
&battery_volt_lim);
if (ret)
return ret;
vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
BQ256XX_VBATREG_BIT_SHIFT;
if (vbatreg_reg_code > BQ2561X_VBATREG_THRESH)
return ((vbatreg_reg_code - BQ2561X_VBATREG_THRESH) *
BQ2561X_VBATREG_STEP_uV) +
BQ25618_VBATREG_THRESH_uV;
return bq25618_619_vbatreg_values[vbatreg_reg_code];
}
static int bq25611d_get_chrg_volt(struct bq256xx_device *bq)
{
unsigned int battery_volt_lim;
unsigned int vbatreg_reg_code;
int ret;
ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
&battery_volt_lim);
if (ret)
return ret;
vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
BQ256XX_VBATREG_BIT_SHIFT;
if (vbatreg_reg_code > BQ2561X_VBATREG_THRESH)
return ((vbatreg_reg_code - BQ2561X_VBATREG_THRESH) *
BQ2561X_VBATREG_STEP_uV) +
BQ25611D_VBATREG_THRESH_uV;
return bq25611d_vbatreg_values[vbatreg_reg_code];
}
static int bq2560x_get_chrg_volt(struct bq256xx_device *bq)
{
unsigned int battery_volt_lim;
unsigned int vbatreg_reg_code;
int ret;
ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
&battery_volt_lim);
if (ret)
return ret;
vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
BQ256XX_VBATREG_BIT_SHIFT;
return (vbatreg_reg_code * BQ2560X_VBATREG_STEP_uV)
+ BQ2560X_VBATREG_OFFSET_uV;
}
static int bq25601d_get_chrg_volt(struct bq256xx_device *bq)
{
unsigned int battery_volt_lim;
unsigned int vbatreg_reg_code;
int ret;
ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
&battery_volt_lim);
if (ret)
return ret;
vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
BQ256XX_VBATREG_BIT_SHIFT;
return (vbatreg_reg_code * BQ2560X_VBATREG_STEP_uV)
+ BQ25601D_VBATREG_OFFSET_uV;
}
static int bq25618_619_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
{
int array_size = ARRAY_SIZE(bq25618_619_vbatreg_values);
unsigned int vbatreg_reg_code;
int vbatreg_max = bq->init_data.vbatreg_max;
vbatreg = clamp(vbatreg, BQ25618_VBATREG_MIN_uV, vbatreg_max);
if (vbatreg > BQ25618_VBATREG_THRESH_uV)
vbatreg_reg_code = ((vbatreg -
BQ25618_VBATREG_THRESH_uV) /
(BQ2561X_VBATREG_STEP_uV)) + BQ2561X_VBATREG_THRESH;
else {
vbatreg_reg_code = bq256xx_array_parse(array_size, vbatreg,
bq25618_619_vbatreg_values);
}
return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
BQ256XX_VBATREG_BIT_SHIFT);
}
static int bq25611d_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
{
int array_size = ARRAY_SIZE(bq25611d_vbatreg_values);
unsigned int vbatreg_reg_code;
int vbatreg_max = bq->init_data.vbatreg_max;
vbatreg = clamp(vbatreg, BQ25611D_VBATREG_MIN_uV, vbatreg_max);
if (vbatreg > BQ25611D_VBATREG_THRESH_uV)
vbatreg_reg_code = ((vbatreg -
BQ25611D_VBATREG_THRESH_uV) /
(BQ2561X_VBATREG_STEP_uV)) + BQ2561X_VBATREG_THRESH;
else {
vbatreg_reg_code = bq256xx_array_parse(array_size, vbatreg,
bq25611d_vbatreg_values);
}
return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
BQ256XX_VBATREG_BIT_SHIFT);
}
static int bq2560x_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
{
unsigned int vbatreg_reg_code;
int vbatreg_max = bq->init_data.vbatreg_max;
vbatreg = clamp(vbatreg, BQ2560X_VBATREG_MIN_uV, vbatreg_max);
vbatreg_reg_code = (vbatreg - BQ2560X_VBATREG_OFFSET_uV) /
BQ2560X_VBATREG_STEP_uV;
return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
BQ256XX_VBATREG_BIT_SHIFT);
}
static int bq25601d_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
{
unsigned int vbatreg_reg_code;
int vbatreg_max = bq->init_data.vbatreg_max;
vbatreg = clamp(vbatreg, BQ25601D_VBATREG_MIN_uV, vbatreg_max);
vbatreg_reg_code = (vbatreg - BQ25601D_VBATREG_OFFSET_uV) /
BQ2560X_VBATREG_STEP_uV;
return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
BQ256XX_VBATREG_BIT_SHIFT);
}
static int bq256xx_set_ts_ignore(struct bq256xx_device *bq, bool ts_ignore)
{
return regmap_update_bits(bq->regmap, BQ256XX_INPUT_CURRENT_LIMIT,
BQ256XX_TS_IGNORE, (ts_ignore ? 1 : 0) << BQ256XX_TS_IGNORE_SHIFT);
}
static int bq256xx_get_prechrg_curr(struct bq256xx_device *bq)
{
unsigned int prechg_and_term_curr_lim;
unsigned int iprechg_reg_code;
int ret;
ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
&prechg_and_term_curr_lim);
if (ret)
return ret;
iprechg_reg_code = (prechg_and_term_curr_lim & BQ256XX_IPRECHG_MASK)
>> BQ256XX_IPRECHG_BIT_SHIFT;
return (iprechg_reg_code * BQ256XX_IPRECHG_STEP_uA) +
BQ256XX_IPRECHG_OFFSET_uA;
}
static int bq256xx_set_prechrg_curr(struct bq256xx_device *bq, int iprechg)
{
unsigned int iprechg_reg_code;
iprechg = clamp(iprechg, BQ256XX_IPRECHG_MIN_uA,
BQ256XX_IPRECHG_MAX_uA);
iprechg_reg_code = ((iprechg - BQ256XX_IPRECHG_OFFSET_uA) /
BQ256XX_IPRECHG_STEP_uA) << BQ256XX_IPRECHG_BIT_SHIFT;
return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
BQ256XX_IPRECHG_MASK, iprechg_reg_code);
}
static int bq25618_619_get_prechrg_curr(struct bq256xx_device *bq)
{
unsigned int prechg_and_term_curr_lim;
unsigned int iprechg_reg_code;
int ret;
ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
&prechg_and_term_curr_lim);
if (ret)
return ret;
iprechg_reg_code = (prechg_and_term_curr_lim & BQ256XX_IPRECHG_MASK)
>> BQ256XX_IPRECHG_BIT_SHIFT;
return (iprechg_reg_code * BQ25618_IPRECHG_STEP_uA) +
BQ25618_IPRECHG_OFFSET_uA;
}
static int bq25618_619_set_prechrg_curr(struct bq256xx_device *bq, int iprechg)
{
unsigned int iprechg_reg_code;
iprechg = clamp(iprechg, BQ25618_IPRECHG_MIN_uA,
BQ25618_IPRECHG_MAX_uA);
iprechg_reg_code = ((iprechg - BQ25618_IPRECHG_OFFSET_uA) /
BQ25618_IPRECHG_STEP_uA) << BQ256XX_IPRECHG_BIT_SHIFT;
return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
BQ256XX_IPRECHG_MASK, iprechg_reg_code);
}
static int bq256xx_get_term_curr(struct bq256xx_device *bq)
{
unsigned int prechg_and_term_curr_lim;
unsigned int iterm_reg_code;
int ret;
ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
&prechg_and_term_curr_lim);
if (ret)
return ret;
iterm_reg_code = prechg_and_term_curr_lim & BQ256XX_ITERM_MASK;
return (iterm_reg_code * BQ256XX_ITERM_STEP_uA) +
BQ256XX_ITERM_OFFSET_uA;
}
static int bq256xx_set_term_curr(struct bq256xx_device *bq, int iterm)
{
unsigned int iterm_reg_code;
iterm = clamp(iterm, BQ256XX_ITERM_MIN_uA, BQ256XX_ITERM_MAX_uA);
iterm_reg_code = (iterm - BQ256XX_ITERM_OFFSET_uA) /
BQ256XX_ITERM_STEP_uA;
return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
BQ256XX_ITERM_MASK, iterm_reg_code);
}
static int bq25618_619_get_term_curr(struct bq256xx_device *bq)
{
unsigned int prechg_and_term_curr_lim;
unsigned int iterm_reg_code;
int ret;
ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
&prechg_and_term_curr_lim);
if (ret)
return ret;
iterm_reg_code = prechg_and_term_curr_lim & BQ256XX_ITERM_MASK;
return (iterm_reg_code * BQ25618_ITERM_STEP_uA) +
BQ25618_ITERM_OFFSET_uA;
}
static int bq25618_619_set_term_curr(struct bq256xx_device *bq, int iterm)
{
unsigned int iterm_reg_code;
iterm = clamp(iterm, BQ25618_ITERM_MIN_uA, BQ25618_ITERM_MAX_uA);
iterm_reg_code = (iterm - BQ25618_ITERM_OFFSET_uA) /
BQ25618_ITERM_STEP_uA;
return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
BQ256XX_ITERM_MASK, iterm_reg_code);
}
static int bq256xx_get_input_volt_lim(struct bq256xx_device *bq)
{
unsigned int charger_control_2;
unsigned int vindpm_reg_code;
int ret;
ret = regmap_read(bq->regmap, BQ256XX_CHARGER_CONTROL_2,
&charger_control_2);
if (ret)
return ret;
vindpm_reg_code = charger_control_2 & BQ256XX_VINDPM_MASK;
return (vindpm_reg_code * BQ256XX_VINDPM_STEP_uV) +
BQ256XX_VINDPM_OFFSET_uV;
}
static int bq256xx_set_input_volt_lim(struct bq256xx_device *bq, int vindpm)
{
unsigned int vindpm_reg_code;
vindpm = clamp(vindpm, BQ256XX_VINDPM_MIN_uV, BQ256XX_VINDPM_MAX_uV);
vindpm_reg_code = (vindpm - BQ256XX_VINDPM_OFFSET_uV) /
BQ256XX_VINDPM_STEP_uV;
return regmap_update_bits(bq->regmap, BQ256XX_CHARGER_CONTROL_2,
BQ256XX_VINDPM_MASK, vindpm_reg_code);
}
static int bq256xx_get_input_curr_lim(struct bq256xx_device *bq)
{
unsigned int input_current_limit;
unsigned int iindpm_reg_code;
int ret;
ret = regmap_read(bq->regmap, BQ256XX_INPUT_CURRENT_LIMIT,
&input_current_limit);
if (ret)
return ret;
iindpm_reg_code = input_current_limit & BQ256XX_IINDPM_MASK;
return (iindpm_reg_code * BQ256XX_IINDPM_STEP_uA) +
BQ256XX_IINDPM_OFFSET_uA;
}
static int bq256xx_set_input_curr_lim(struct bq256xx_device *bq, int iindpm)
{
unsigned int iindpm_reg_code;
iindpm = clamp(iindpm, BQ256XX_IINDPM_MIN_uA, BQ256XX_IINDPM_MAX_uA);
iindpm_reg_code = (iindpm - BQ256XX_IINDPM_OFFSET_uA) /
BQ256XX_IINDPM_STEP_uA;
return regmap_update_bits(bq->regmap, BQ256XX_INPUT_CURRENT_LIMIT,
BQ256XX_IINDPM_MASK, iindpm_reg_code);
}
static void bq256xx_charger_reset(void *data)
{
struct bq256xx_device *bq = data;
regmap_update_bits(bq->regmap, BQ256XX_PART_INFORMATION,
BQ256XX_REG_RST, BQ256XX_REG_RST);
if (!IS_ERR_OR_NULL(bq->usb2_phy))
usb_unregister_notifier(bq->usb2_phy, &bq->usb_nb);
if (!IS_ERR_OR_NULL(bq->usb3_phy))
usb_unregister_notifier(bq->usb3_phy, &bq->usb_nb);
}
static int bq256xx_set_charger_property(struct power_supply *psy,
enum power_supply_property prop,
const union power_supply_propval *val)
{
struct bq256xx_device *bq = power_supply_get_drvdata(psy);
int ret = -EINVAL;
switch (prop) {
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = bq->chip_info->bq256xx_set_iindpm(bq, val->intval);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_STATUS:
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = bq->chip_info->bq256xx_set_vbatreg(bq, val->intval);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = bq->chip_info->bq256xx_set_ichg(bq, val->intval);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
ret = bq->chip_info->bq256xx_set_iprechg(bq, val->intval);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
ret = bq->chip_info->bq256xx_set_iterm(bq, val->intval);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
ret = bq->chip_info->bq256xx_set_vindpm(bq, val->intval);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
ret = bq->chip_info->bq256xx_set_charge_type(bq, val->intval);
if (ret)
return ret;
break;
default:
break;
}
return ret;
}
static int bq256xx_get_battery_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct bq256xx_device *bq = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
val->intval = bq->init_data.ichg_max;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
val->intval = bq->init_data.vbatreg_max;
break;
default:
return -EINVAL;
}
return 0;
}
static int bq256xx_get_charger_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct bq256xx_device *bq = power_supply_get_drvdata(psy);
struct bq256xx_state state;
int ret = 0;
mutex_lock(&bq->lock);
ret = bq256xx_get_state(bq, &state);
mutex_unlock(&bq->lock);
if (ret)
return ret;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
if (state.vbus_stat == BQ256XX_VBUS_STAT_NO_INPUT ||
state.vbus_stat == BQ256XX_VBUS_STAT_USB_OTG)
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
else if (state.chrg_stat == BQ256XX_CHRG_STAT_NOT_CHRGING)
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
else if (state.chrg_stat == BQ256XX_CHRG_STAT_CHRG_TERM)
val->intval = POWER_SUPPLY_STATUS_FULL;
else
val->intval = POWER_SUPPLY_STATUS_CHARGING;
break;
case POWER_SUPPLY_PROP_HEALTH:
val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
if (state.wdt_fault) {
val->intval =
POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE;
} else if (state.bat_fault) {
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
} else {
switch (state.chrg_stat) {
case BQ256XX_CHRG_FAULT_INPUT:
val->intval =
POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
break;
case BQ256XX_CHRG_FAULT_THERM:
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
break;
case BQ256XX_CHRG_FAULT_CST_EXPIRE:
val->intval =
POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
break;
default:
break;
}
switch (state.ntc_fault) {
case BQ256XX_NTC_FAULT_WARM:
val->intval = POWER_SUPPLY_HEALTH_WARM;
break;
case BQ256XX_NTC_FAULT_COOL:
val->intval = POWER_SUPPLY_HEALTH_COOL;
break;
case BQ256XX_NTC_FAULT_COLD:
val->intval = POWER_SUPPLY_HEALTH_COLD;
break;
case BQ256XX_NTC_FAULT_HOT:
val->intval = POWER_SUPPLY_HEALTH_HOT;
break;
default:
val->intval = POWER_SUPPLY_HEALTH_GOOD;
break;
}
}
break;
case POWER_SUPPLY_PROP_USB_TYPE:
if (bq->chip_info->has_usb_detect) {
switch (state.vbus_stat) {
case BQ256XX_VBUS_STAT_USB_SDP:
val->intval = POWER_SUPPLY_USB_TYPE_SDP;
break;
case BQ256XX_VBUS_STAT_USB_CDP:
val->intval = POWER_SUPPLY_USB_TYPE_CDP;
break;
case BQ256XX_VBUS_STAT_USB_DCP:
val->intval = POWER_SUPPLY_USB_TYPE_DCP;
break;
case BQ256XX_VBUS_STAT_USB_OTG:
val->intval = POWER_SUPPLY_USB_TYPE_ACA;
break;
default:
val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
break;
}
} else {
switch (state.vbus_stat) {
case BQ256XX_VBUS_STAT_USB_SDP:
val->intval = POWER_SUPPLY_USB_TYPE_SDP;
break;
case BQ256XX_VBUS_STAT_USB_OTG:
val->intval = POWER_SUPPLY_USB_TYPE_ACA;
break;
default:
val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
break;
}
}
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
switch (state.chrg_stat) {
case BQ256XX_CHRG_STAT_NOT_CHRGING:
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
case BQ256XX_CHRG_STAT_PRECHRGING:
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
case BQ256XX_CHRG_STAT_FAST_CHRGING:
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
case BQ256XX_CHRG_STAT_CHRG_TERM:
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
default:
val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
}
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = BQ256XX_MANUFACTURER;
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = bq->model_name;
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = state.online;
break;
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
ret = bq->chip_info->bq256xx_get_vindpm(bq);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = bq->chip_info->bq256xx_get_iindpm(bq);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = bq->chip_info->bq256xx_get_vbatreg(bq);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = bq->chip_info->bq256xx_get_ichg(bq);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
ret = bq->chip_info->bq256xx_get_iprechg(bq);
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
ret = bq->chip_info->bq256xx_get_iterm(bq);
if (ret < 0)
return ret;
val->intval = ret;
break;
default:
return -EINVAL;
}
return ret;
}
static bool bq256xx_state_changed(struct bq256xx_device *bq,
struct bq256xx_state *new_state)
{
struct bq256xx_state old_state;
mutex_lock(&bq->lock);
old_state = bq->state;
mutex_unlock(&bq->lock);
return memcmp(&old_state, new_state, sizeof(struct bq256xx_state)) != 0;
}
static irqreturn_t bq256xx_irq_handler_thread(int irq, void *private)
{
struct bq256xx_device *bq = private;
struct bq256xx_state state;
int ret;
ret = bq256xx_get_state(bq, &state);
if (ret < 0)
goto irq_out;
if (!bq256xx_state_changed(bq, &state))
goto irq_out;
mutex_lock(&bq->lock);
bq->state = state;
mutex_unlock(&bq->lock);
power_supply_changed(bq->charger);
irq_out:
return IRQ_HANDLED;
}
static enum power_supply_property bq256xx_power_supply_props[] = {
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_USB_TYPE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
};
static enum power_supply_property bq256xx_battery_props[] = {
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
};
static int bq256xx_property_is_writeable(struct power_supply *psy,
enum power_supply_property prop)
{
switch (prop) {
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
case POWER_SUPPLY_PROP_STATUS:
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
case POWER_SUPPLY_PROP_CHARGE_TYPE:
return true;
default:
return false;
}
}
static const struct power_supply_desc bq256xx_power_supply_desc = {
.name = "bq256xx-charger",
.type = POWER_SUPPLY_TYPE_USB,
.usb_types = bq256xx_usb_type,
.num_usb_types = ARRAY_SIZE(bq256xx_usb_type),
.properties = bq256xx_power_supply_props,
.num_properties = ARRAY_SIZE(bq256xx_power_supply_props),
.get_property = bq256xx_get_charger_property,
.set_property = bq256xx_set_charger_property,
.property_is_writeable = bq256xx_property_is_writeable,
};
static struct power_supply_desc bq256xx_battery_desc = {
.name = "bq256xx-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.get_property = bq256xx_get_battery_property,
.properties = bq256xx_battery_props,
.num_properties = ARRAY_SIZE(bq256xx_battery_props),
.property_is_writeable = bq256xx_property_is_writeable,
};
static bool bq256xx_is_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case BQ256XX_INPUT_CURRENT_LIMIT:
case BQ256XX_CHARGER_STATUS_0...BQ256XX_CHARGER_STATUS_2:
return true;
default:
return false;
}
}
static const struct regmap_config bq25600_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = BQ256XX_PART_INFORMATION,
.reg_defaults = bq2560x_reg_defs,
.num_reg_defaults = ARRAY_SIZE(bq2560x_reg_defs),
.cache_type = REGCACHE_FLAT,
.volatile_reg = bq256xx_is_volatile_reg,
};
static const struct regmap_config bq25611d_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = BQ256XX_CHARGER_CONTROL_4,
.reg_defaults = bq25611d_reg_defs,
.num_reg_defaults = ARRAY_SIZE(bq25611d_reg_defs),
.cache_type = REGCACHE_FLAT,
.volatile_reg = bq256xx_is_volatile_reg,
};
static const struct regmap_config bq25618_619_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = BQ256XX_CHARGER_CONTROL_4,
.reg_defaults = bq25618_619_reg_defs,
.num_reg_defaults = ARRAY_SIZE(bq25618_619_reg_defs),
.cache_type = REGCACHE_FLAT,
.volatile_reg = bq256xx_is_volatile_reg,
};
static const struct bq256xx_chip_info bq256xx_chip_info_tbl[] = {
[BQ25600] = {
.model_id = BQ25600,
.bq256xx_regmap_config = &bq25600_regmap_config,
.bq256xx_get_ichg = bq256xx_get_ichg_curr,
.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
.bq256xx_get_vbatreg = bq2560x_get_chrg_volt,
.bq256xx_get_iterm = bq256xx_get_term_curr,
.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
.bq256xx_set_ts_ignore = NULL,
.bq256xx_set_ichg = bq256xx_set_ichg_curr,
.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
.bq256xx_set_vbatreg = bq2560x_set_chrg_volt,
.bq256xx_set_iterm = bq256xx_set_term_curr,
.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
.bq256xx_set_charge_type = bq256xx_set_charge_type,
.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,
.has_usb_detect = false,
},
[BQ25600D] = {
.model_id = BQ25600D,
.bq256xx_regmap_config = &bq25600_regmap_config,
.bq256xx_get_ichg = bq256xx_get_ichg_curr,
.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
.bq256xx_get_vbatreg = bq2560x_get_chrg_volt,
.bq256xx_get_iterm = bq256xx_get_term_curr,
.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
.bq256xx_set_ichg = bq256xx_set_ichg_curr,
.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
.bq256xx_set_vbatreg = bq2560x_set_chrg_volt,
.bq256xx_set_iterm = bq256xx_set_term_curr,
.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
.bq256xx_set_charge_type = bq256xx_set_charge_type,
.bq256xx_set_ts_ignore = NULL,
.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,
.has_usb_detect = true,
},
[BQ25601] = {
.model_id = BQ25601,
.bq256xx_regmap_config = &bq25600_regmap_config,
.bq256xx_get_ichg = bq256xx_get_ichg_curr,
.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
.bq256xx_get_vbatreg = bq2560x_get_chrg_volt,
.bq256xx_get_iterm = bq256xx_get_term_curr,
.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
.bq256xx_set_ichg = bq256xx_set_ichg_curr,
.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
.bq256xx_set_vbatreg = bq2560x_set_chrg_volt,
.bq256xx_set_iterm = bq256xx_set_term_curr,
.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
.bq256xx_set_charge_type = bq256xx_set_charge_type,
.bq256xx_set_ts_ignore = NULL,
.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,
.has_usb_detect = false,
},
[BQ25601D] = {
.model_id = BQ25601D,
.bq256xx_regmap_config = &bq25600_regmap_config,
.bq256xx_get_ichg = bq256xx_get_ichg_curr,
.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
.bq256xx_get_vbatreg = bq25601d_get_chrg_volt,
.bq256xx_get_iterm = bq256xx_get_term_curr,
.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
.bq256xx_set_ichg = bq256xx_set_ichg_curr,
.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
.bq256xx_set_vbatreg = bq25601d_set_chrg_volt,
.bq256xx_set_iterm = bq256xx_set_term_curr,
.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
.bq256xx_set_charge_type = bq256xx_set_charge_type,
.bq256xx_set_ts_ignore = NULL,
.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,
.has_usb_detect = true,
},
[BQ25611D] = {
.model_id = BQ25611D,
.bq256xx_regmap_config = &bq25611d_regmap_config,
.bq256xx_get_ichg = bq256xx_get_ichg_curr,
.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
.bq256xx_get_vbatreg = bq25611d_get_chrg_volt,
.bq256xx_get_iterm = bq256xx_get_term_curr,
.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
.bq256xx_set_ichg = bq256xx_set_ichg_curr,
.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
.bq256xx_set_vbatreg = bq25611d_set_chrg_volt,
.bq256xx_set_iterm = bq256xx_set_term_curr,
.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
.bq256xx_set_charge_type = bq256xx_set_charge_type,
.bq256xx_set_ts_ignore = bq256xx_set_ts_ignore,
.bq256xx_def_ichg = BQ25611D_ICHG_DEF_uA,
.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
.bq256xx_def_vbatreg = BQ25611D_VBATREG_DEF_uV,
.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
.bq256xx_max_vbatreg = BQ25611D_VBATREG_MAX_uV,
.has_usb_detect = true,
},
[BQ25618] = {
.model_id = BQ25618,
.bq256xx_regmap_config = &bq25618_619_regmap_config,
.bq256xx_get_ichg = bq25618_619_get_ichg_curr,
.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
.bq256xx_get_vbatreg = bq25618_619_get_chrg_volt,
.bq256xx_get_iterm = bq25618_619_get_term_curr,
.bq256xx_get_iprechg = bq25618_619_get_prechrg_curr,
.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
.bq256xx_set_ichg = bq25618_619_set_ichg_curr,
.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
.bq256xx_set_vbatreg = bq25618_619_set_chrg_volt,
.bq256xx_set_iterm = bq25618_619_set_term_curr,
.bq256xx_set_iprechg = bq25618_619_set_prechrg_curr,
.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
.bq256xx_set_charge_type = bq256xx_set_charge_type,
.bq256xx_set_ts_ignore = bq256xx_set_ts_ignore,
.bq256xx_def_ichg = BQ25618_ICHG_DEF_uA,
.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
.bq256xx_def_vbatreg = BQ25618_VBATREG_DEF_uV,
.bq256xx_def_iterm = BQ25618_ITERM_DEF_uA,
.bq256xx_def_iprechg = BQ25618_IPRECHG_DEF_uA,
.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
.bq256xx_max_ichg = BQ25618_ICHG_MAX_uA,
.bq256xx_max_vbatreg = BQ25618_VBATREG_MAX_uV,
.has_usb_detect = false,
},
[BQ25619] = {
.model_id = BQ25619,
.bq256xx_regmap_config = &bq25618_619_regmap_config,
.bq256xx_get_ichg = bq25618_619_get_ichg_curr,
.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
.bq256xx_get_vbatreg = bq25618_619_get_chrg_volt,
.bq256xx_get_iterm = bq25618_619_get_term_curr,
.bq256xx_get_iprechg = bq25618_619_get_prechrg_curr,
.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
.bq256xx_set_ichg = bq25618_619_set_ichg_curr,
.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
.bq256xx_set_vbatreg = bq25618_619_set_chrg_volt,
.bq256xx_set_iterm = bq25618_619_set_term_curr,
.bq256xx_set_iprechg = bq25618_619_set_prechrg_curr,
.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
.bq256xx_set_charge_type = bq256xx_set_charge_type,
.bq256xx_set_ts_ignore = bq256xx_set_ts_ignore,
.bq256xx_def_ichg = BQ25618_ICHG_DEF_uA,
.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
.bq256xx_def_vbatreg = BQ25618_VBATREG_DEF_uV,
.bq256xx_def_iterm = BQ25618_ITERM_DEF_uA,
.bq256xx_def_iprechg = BQ25618_IPRECHG_DEF_uA,
.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
.bq256xx_max_ichg = BQ25618_ICHG_MAX_uA,
.bq256xx_max_vbatreg = BQ25618_VBATREG_MAX_uV,
.has_usb_detect = false,
},
};
static int bq256xx_power_supply_init(struct bq256xx_device *bq,
struct power_supply_config *psy_cfg, struct device *dev)
{
bq->charger = devm_power_supply_register(bq->dev,
&bq256xx_power_supply_desc,
psy_cfg);
if (IS_ERR(bq->charger)) {
dev_err(dev, "power supply register charger failed\n");
return PTR_ERR(bq->charger);
}
bq->battery = devm_power_supply_register(bq->dev,
&bq256xx_battery_desc,
psy_cfg);
if (IS_ERR(bq->battery)) {
dev_err(dev, "power supply register battery failed\n");
return PTR_ERR(bq->battery);
}
return 0;
}
static int bq256xx_hw_init(struct bq256xx_device *bq)
{
struct power_supply_battery_info *bat_info;
int wd_reg_val = BQ256XX_WATCHDOG_DIS;
int ret = 0;
int i;
for (i = 0; i < BQ256XX_NUM_WD_VAL; i++) {
if (bq->watchdog_timer == bq256xx_watchdog_time[i]) {
wd_reg_val = i;
break;
}
if (bq->watchdog_timer > bq256xx_watchdog_time[i] &&
bq->watchdog_timer < bq256xx_watchdog_time[i + 1])
wd_reg_val = i;
}
ret = regmap_update_bits(bq->regmap, BQ256XX_CHARGER_CONTROL_1,
BQ256XX_WATCHDOG_MASK, wd_reg_val <<
BQ256XX_WDT_BIT_SHIFT);
ret = power_supply_get_battery_info(bq->charger, &bat_info);
if (ret == -ENOMEM)
return ret;
if (ret) {
dev_warn(bq->dev, "battery info missing, default values will be applied\n");
bat_info->constant_charge_current_max_ua =
bq->chip_info->bq256xx_def_ichg;
bat_info->constant_charge_voltage_max_uv =
bq->chip_info->bq256xx_def_vbatreg;
bat_info->precharge_current_ua =
bq->chip_info->bq256xx_def_iprechg;
bat_info->charge_term_current_ua =
bq->chip_info->bq256xx_def_iterm;
bq->init_data.ichg_max =
bq->chip_info->bq256xx_max_ichg;
bq->init_data.vbatreg_max =
bq->chip_info->bq256xx_max_vbatreg;
} else {
bq->init_data.ichg_max =
bat_info->constant_charge_current_max_ua;
bq->init_data.vbatreg_max =
bat_info->constant_charge_voltage_max_uv;
}
ret = bq->chip_info->bq256xx_set_vindpm(bq, bq->init_data.vindpm);
if (ret)
return ret;
ret = bq->chip_info->bq256xx_set_iindpm(bq, bq->init_data.iindpm);
if (ret)
return ret;
ret = bq->chip_info->bq256xx_set_ichg(bq,
bq->chip_info->bq256xx_def_ichg);
if (ret)
return ret;
ret = bq->chip_info->bq256xx_set_iprechg(bq,
bat_info->precharge_current_ua);
if (ret)
return ret;
ret = bq->chip_info->bq256xx_set_vbatreg(bq,
bq->chip_info->bq256xx_def_vbatreg);
if (ret)
return ret;
ret = bq->chip_info->bq256xx_set_iterm(bq,
bat_info->charge_term_current_ua);
if (ret)
return ret;
if (bq->chip_info->bq256xx_set_ts_ignore) {
ret = bq->chip_info->bq256xx_set_ts_ignore(bq, bq->init_data.ts_ignore);
if (ret)
return ret;
}
power_supply_put_battery_info(bq->charger, bat_info);
return 0;
}
static int bq256xx_parse_dt(struct bq256xx_device *bq,
struct power_supply_config *psy_cfg, struct device *dev)
{
int ret = 0;
psy_cfg->drv_data = bq;
psy_cfg->of_node = dev->of_node;
ret = device_property_read_u32(bq->dev, "ti,watchdog-timeout-ms",
&bq->watchdog_timer);
if (ret)
bq->watchdog_timer = BQ256XX_WATCHDOG_DIS;
if (bq->watchdog_timer > BQ256XX_WATCHDOG_MAX ||
bq->watchdog_timer < BQ256XX_WATCHDOG_DIS)
return -EINVAL;
ret = device_property_read_u32(bq->dev,
"input-voltage-limit-microvolt",
&bq->init_data.vindpm);
if (ret)
bq->init_data.vindpm = bq->chip_info->bq256xx_def_vindpm;
ret = device_property_read_u32(bq->dev,
"input-current-limit-microamp",
&bq->init_data.iindpm);
if (ret)
bq->init_data.iindpm = bq->chip_info->bq256xx_def_iindpm;
bq->init_data.ts_ignore = device_property_read_bool(bq->dev, "ti,no-thermistor");
return 0;
}
static int bq256xx_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct device *dev = &client->dev;
struct bq256xx_device *bq;
struct power_supply_config psy_cfg = { };
int ret;
bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
if (!bq)
return -ENOMEM;
bq->client = client;
bq->dev = dev;
bq->chip_info = &bq256xx_chip_info_tbl[id->driver_data];
mutex_init(&bq->lock);
strncpy(bq->model_name, id->name, I2C_NAME_SIZE);
bq->regmap = devm_regmap_init_i2c(client,
bq->chip_info->bq256xx_regmap_config);
if (IS_ERR(bq->regmap)) {
dev_err(dev, "Failed to allocate register map\n");
return PTR_ERR(bq->regmap);
}
i2c_set_clientdata(client, bq);
ret = bq256xx_parse_dt(bq, &psy_cfg, dev);
if (ret) {
dev_err(dev, "Failed to read device tree properties%d\n", ret);
return ret;
}
ret = devm_add_action_or_reset(dev, bq256xx_charger_reset, bq);
if (ret)
return ret;
/* OTG reporting */
bq->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
if (!IS_ERR_OR_NULL(bq->usb2_phy)) {
INIT_WORK(&bq->usb_work, bq256xx_usb_work);
bq->usb_nb.notifier_call = bq256xx_usb_notifier;
usb_register_notifier(bq->usb2_phy, &bq->usb_nb);
}
bq->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
if (!IS_ERR_OR_NULL(bq->usb3_phy)) {
INIT_WORK(&bq->usb_work, bq256xx_usb_work);
bq->usb_nb.notifier_call = bq256xx_usb_notifier;
usb_register_notifier(bq->usb3_phy, &bq->usb_nb);
}
if (client->irq) {
ret = devm_request_threaded_irq(dev, client->irq, NULL,
bq256xx_irq_handler_thread,
IRQF_TRIGGER_FALLING |
IRQF_ONESHOT,
dev_name(&client->dev), bq);
if (ret < 0) {
dev_err(dev, "get irq fail: %d\n", ret);
return ret;
}
}
ret = bq256xx_power_supply_init(bq, &psy_cfg, dev);
if (ret) {
dev_err(dev, "Failed to register power supply\n");
return ret;
}
ret = bq256xx_hw_init(bq);
if (ret) {
dev_err(dev, "Cannot initialize the chip.\n");
return ret;
}
return ret;
}
static const struct i2c_device_id bq256xx_i2c_ids[] = {
{ "bq25600", BQ25600 },
{ "bq25600d", BQ25600D },
{ "bq25601", BQ25601 },
{ "bq25601d", BQ25601D },
{ "bq25611d", BQ25611D },
{ "bq25618", BQ25618 },
{ "bq25619", BQ25619 },
{},
};
MODULE_DEVICE_TABLE(i2c, bq256xx_i2c_ids);
static const struct of_device_id bq256xx_of_match[] = {
{ .compatible = "ti,bq25600", .data = (void *)BQ25600 },
{ .compatible = "ti,bq25600d", .data = (void *)BQ25600D },
{ .compatible = "ti,bq25601", .data = (void *)BQ25601 },
{ .compatible = "ti,bq25601d", .data = (void *)BQ25601D },
{ .compatible = "ti,bq25611d", .data = (void *)BQ25611D },
{ .compatible = "ti,bq25618", .data = (void *)BQ25618 },
{ .compatible = "ti,bq25619", .data = (void *)BQ25619 },
{ },
};
MODULE_DEVICE_TABLE(of, bq256xx_of_match);
static const struct acpi_device_id bq256xx_acpi_match[] = {
{ "bq25600", BQ25600 },
{ "bq25600d", BQ25600D },
{ "bq25601", BQ25601 },
{ "bq25601d", BQ25601D },
{ "bq25611d", BQ25611D },
{ "bq25618", BQ25618 },
{ "bq25619", BQ25619 },
{},
};
MODULE_DEVICE_TABLE(acpi, bq256xx_acpi_match);
static struct i2c_driver bq256xx_driver = {
.driver = {
.name = "bq256xx-charger",
.of_match_table = bq256xx_of_match,
.acpi_match_table = bq256xx_acpi_match,
},
.probe = bq256xx_probe,
.id_table = bq256xx_i2c_ids,
};
module_i2c_driver(bq256xx_driver);
MODULE_AUTHOR("Ricardo Rivera-Matos <[email protected]>");
MODULE_DESCRIPTION("bq256xx charger driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/power/supply/bq256xx_charger.c |
// SPDX-License-Identifier: GPL-2.0
/*
* BQ27xxx battery monitor HDQ/1-wire driver
*
* Copyright (C) 2007-2017 Texas Instruments Incorporated - https://www.ti.com/
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/power/bq27xxx_battery.h>
#include <linux/w1.h>
#define W1_FAMILY_BQ27000 0x01
#define HDQ_CMD_READ (0 << 7)
#define HDQ_CMD_WRITE (1 << 7)
static int F_ID;
module_param(F_ID, int, S_IRUSR);
MODULE_PARM_DESC(F_ID, "1-wire slave FID for BQ27xxx device");
static int w1_bq27000_read(struct w1_slave *sl, unsigned int reg)
{
u8 val;
mutex_lock(&sl->master->bus_mutex);
w1_write_8(sl->master, HDQ_CMD_READ | reg);
val = w1_read_8(sl->master);
mutex_unlock(&sl->master->bus_mutex);
return val;
}
static int bq27xxx_battery_hdq_read(struct bq27xxx_device_info *di, u8 reg,
bool single)
{
struct w1_slave *sl = dev_to_w1_slave(di->dev);
unsigned int timeout = 3;
int upper, lower;
int temp;
if (!single) {
/*
* Make sure the value has not changed in between reading the
* lower and the upper part
*/
upper = w1_bq27000_read(sl, reg + 1);
do {
temp = upper;
if (upper < 0)
return upper;
lower = w1_bq27000_read(sl, reg);
if (lower < 0)
return lower;
upper = w1_bq27000_read(sl, reg + 1);
} while (temp != upper && --timeout);
if (timeout == 0)
return -EIO;
return (upper << 8) | lower;
}
return w1_bq27000_read(sl, reg);
}
static int bq27xxx_battery_hdq_add_slave(struct w1_slave *sl)
{
struct bq27xxx_device_info *di;
di = devm_kzalloc(&sl->dev, sizeof(*di), GFP_KERNEL);
if (!di)
return -ENOMEM;
dev_set_drvdata(&sl->dev, di);
di->dev = &sl->dev;
di->chip = BQ27000;
di->name = "bq27000-battery";
di->bus.read = bq27xxx_battery_hdq_read;
return bq27xxx_battery_setup(di);
}
static void bq27xxx_battery_hdq_remove_slave(struct w1_slave *sl)
{
struct bq27xxx_device_info *di = dev_get_drvdata(&sl->dev);
bq27xxx_battery_teardown(di);
}
static const struct w1_family_ops bq27xxx_battery_hdq_fops = {
.add_slave = bq27xxx_battery_hdq_add_slave,
.remove_slave = bq27xxx_battery_hdq_remove_slave,
};
static struct w1_family bq27xxx_battery_hdq_family = {
.fid = W1_FAMILY_BQ27000,
.fops = &bq27xxx_battery_hdq_fops,
};
static int __init bq27xxx_battery_hdq_init(void)
{
if (F_ID)
bq27xxx_battery_hdq_family.fid = F_ID;
return w1_register_family(&bq27xxx_battery_hdq_family);
}
module_init(bq27xxx_battery_hdq_init);
static void __exit bq27xxx_battery_hdq_exit(void)
{
w1_unregister_family(&bq27xxx_battery_hdq_family);
}
module_exit(bq27xxx_battery_hdq_exit);
MODULE_AUTHOR("Texas Instruments Ltd");
MODULE_DESCRIPTION("BQ27xxx battery monitor HDQ/1-wire driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("w1-family-" __stringify(W1_FAMILY_BQ27000));
| linux-master | drivers/power/supply/bq27xxx_battery_hdq.c |
/*
* Driver for batteries with DS2760 chips inside.
*
* Copyright © 2007 Anton Vorontsov
* 2004-2007 Matt Reimer
* 2004 Szabolcs Gyurko
*
* Use consistent with the GNU GPL is permitted,
* provided that this copyright notice is
* preserved in its entirety in all copies and derived works.
*
* Author: Anton Vorontsov <[email protected]>
* February 2007
*
* Matt Reimer <[email protected]>
* April 2004, 2005, 2007
*
* Szabolcs Gyurko <[email protected]>
* September 2004
*/
#include <linux/module.h>
#include <linux/param.h>
#include <linux/jiffies.h>
#include <linux/workqueue.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/suspend.h>
#include <linux/w1.h>
#include <linux/of.h>
static unsigned int cache_time = 1000;
module_param(cache_time, uint, 0644);
MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
static bool pmod_enabled;
module_param(pmod_enabled, bool, 0644);
MODULE_PARM_DESC(pmod_enabled, "PMOD enable bit");
static unsigned int rated_capacity;
module_param(rated_capacity, uint, 0644);
MODULE_PARM_DESC(rated_capacity, "rated battery capacity, 10*mAh or index");
static unsigned int current_accum;
module_param(current_accum, uint, 0644);
MODULE_PARM_DESC(current_accum, "current accumulator value");
#define W1_FAMILY_DS2760 0x30
/* Known commands to the DS2760 chip */
#define W1_DS2760_SWAP 0xAA
#define W1_DS2760_READ_DATA 0x69
#define W1_DS2760_WRITE_DATA 0x6C
#define W1_DS2760_COPY_DATA 0x48
#define W1_DS2760_RECALL_DATA 0xB8
#define W1_DS2760_LOCK 0x6A
/* Number of valid register addresses */
#define DS2760_DATA_SIZE 0x40
#define DS2760_PROTECTION_REG 0x00
#define DS2760_STATUS_REG 0x01
#define DS2760_STATUS_IE (1 << 2)
#define DS2760_STATUS_SWEN (1 << 3)
#define DS2760_STATUS_RNAOP (1 << 4)
#define DS2760_STATUS_PMOD (1 << 5)
#define DS2760_EEPROM_REG 0x07
#define DS2760_SPECIAL_FEATURE_REG 0x08
#define DS2760_VOLTAGE_MSB 0x0c
#define DS2760_VOLTAGE_LSB 0x0d
#define DS2760_CURRENT_MSB 0x0e
#define DS2760_CURRENT_LSB 0x0f
#define DS2760_CURRENT_ACCUM_MSB 0x10
#define DS2760_CURRENT_ACCUM_LSB 0x11
#define DS2760_TEMP_MSB 0x18
#define DS2760_TEMP_LSB 0x19
#define DS2760_EEPROM_BLOCK0 0x20
#define DS2760_ACTIVE_FULL 0x20
#define DS2760_EEPROM_BLOCK1 0x30
#define DS2760_STATUS_WRITE_REG 0x31
#define DS2760_RATED_CAPACITY 0x32
#define DS2760_CURRENT_OFFSET_BIAS 0x33
#define DS2760_ACTIVE_EMPTY 0x3b
struct ds2760_device_info {
struct device *dev;
/* DS2760 data, valid after calling ds2760_battery_read_status() */
unsigned long update_time; /* jiffies when data read */
char raw[DS2760_DATA_SIZE]; /* raw DS2760 data */
int voltage_raw; /* units of 4.88 mV */
int voltage_uV; /* units of µV */
int current_raw; /* units of 0.625 mA */
int current_uA; /* units of µA */
int accum_current_raw; /* units of 0.25 mAh */
int accum_current_uAh; /* units of µAh */
int temp_raw; /* units of 0.125 °C */
int temp_C; /* units of 0.1 °C */
int rated_capacity; /* units of µAh */
int rem_capacity; /* percentage */
int full_active_uAh; /* units of µAh */
int empty_uAh; /* units of µAh */
int life_sec; /* units of seconds */
int charge_status; /* POWER_SUPPLY_STATUS_* */
int full_counter;
struct power_supply *bat;
struct power_supply_desc bat_desc;
struct workqueue_struct *monitor_wqueue;
struct delayed_work monitor_work;
struct delayed_work set_charged_work;
struct notifier_block pm_notifier;
};
static int w1_ds2760_io(struct device *dev, char *buf, int addr, size_t count,
int io)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
if (!dev)
return 0;
mutex_lock(&sl->master->bus_mutex);
if (addr > DS2760_DATA_SIZE || addr < 0) {
count = 0;
goto out;
}
if (addr + count > DS2760_DATA_SIZE)
count = DS2760_DATA_SIZE - addr;
if (!w1_reset_select_slave(sl)) {
if (!io) {
w1_write_8(sl->master, W1_DS2760_READ_DATA);
w1_write_8(sl->master, addr);
count = w1_read_block(sl->master, buf, count);
} else {
w1_write_8(sl->master, W1_DS2760_WRITE_DATA);
w1_write_8(sl->master, addr);
w1_write_block(sl->master, buf, count);
/* XXX w1_write_block returns void, not n_written */
}
}
out:
mutex_unlock(&sl->master->bus_mutex);
return count;
}
static int w1_ds2760_read(struct device *dev,
char *buf, int addr,
size_t count)
{
return w1_ds2760_io(dev, buf, addr, count, 0);
}
static int w1_ds2760_write(struct device *dev,
char *buf,
int addr, size_t count)
{
return w1_ds2760_io(dev, buf, addr, count, 1);
}
static int w1_ds2760_eeprom_cmd(struct device *dev, int addr, int cmd)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
if (!dev)
return -EINVAL;
mutex_lock(&sl->master->bus_mutex);
if (w1_reset_select_slave(sl) == 0) {
w1_write_8(sl->master, cmd);
w1_write_8(sl->master, addr);
}
mutex_unlock(&sl->master->bus_mutex);
return 0;
}
static int w1_ds2760_store_eeprom(struct device *dev, int addr)
{
return w1_ds2760_eeprom_cmd(dev, addr, W1_DS2760_COPY_DATA);
}
static int w1_ds2760_recall_eeprom(struct device *dev, int addr)
{
return w1_ds2760_eeprom_cmd(dev, addr, W1_DS2760_RECALL_DATA);
}
static ssize_t w1_slave_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr, char *buf,
loff_t off, size_t count)
{
struct device *dev = kobj_to_dev(kobj);
return w1_ds2760_read(dev, buf, off, count);
}
static BIN_ATTR_RO(w1_slave, DS2760_DATA_SIZE);
static struct bin_attribute *w1_ds2760_bin_attrs[] = {
&bin_attr_w1_slave,
NULL,
};
static const struct attribute_group w1_ds2760_group = {
.bin_attrs = w1_ds2760_bin_attrs,
};
static const struct attribute_group *w1_ds2760_groups[] = {
&w1_ds2760_group,
NULL,
};
/* Some batteries have their rated capacity stored a N * 10 mAh, while
* others use an index into this table. */
static int rated_capacities[] = {
0,
920, /* Samsung */
920, /* BYD */
920, /* Lishen */
920, /* NEC */
1440, /* Samsung */
1440, /* BYD */
1440, /* Lishen */
1440, /* NEC */
2880, /* Samsung */
2880, /* BYD */
2880, /* Lishen */
2880, /* NEC */
};
/* array is level at temps 0°C, 10°C, 20°C, 30°C, 40°C
* temp is in Celsius */
static int battery_interpolate(int array[], int temp)
{
int index, dt;
if (temp <= 0)
return array[0];
if (temp >= 40)
return array[4];
index = temp / 10;
dt = temp % 10;
return array[index] + (((array[index + 1] - array[index]) * dt) / 10);
}
static int ds2760_battery_read_status(struct ds2760_device_info *di)
{
int ret, i, start, count, scale[5];
if (di->update_time && time_before(jiffies, di->update_time +
msecs_to_jiffies(cache_time)))
return 0;
/* The first time we read the entire contents of SRAM/EEPROM,
* but after that we just read the interesting bits that change. */
if (di->update_time == 0) {
start = 0;
count = DS2760_DATA_SIZE;
} else {
start = DS2760_VOLTAGE_MSB;
count = DS2760_TEMP_LSB - start + 1;
}
ret = w1_ds2760_read(di->dev, di->raw + start, start, count);
if (ret != count) {
dev_warn(di->dev, "call to w1_ds2760_read failed (0x%p)\n",
di->dev);
return 1;
}
di->update_time = jiffies;
/* DS2760 reports voltage in units of 4.88mV, but the battery class
* reports in units of uV, so convert by multiplying by 4880. */
di->voltage_raw = (di->raw[DS2760_VOLTAGE_MSB] << 3) |
(di->raw[DS2760_VOLTAGE_LSB] >> 5);
di->voltage_uV = di->voltage_raw * 4880;
/* DS2760 reports current in signed units of 0.625mA, but the battery
* class reports in units of µA, so convert by multiplying by 625. */
di->current_raw =
(((signed char)di->raw[DS2760_CURRENT_MSB]) << 5) |
(di->raw[DS2760_CURRENT_LSB] >> 3);
di->current_uA = di->current_raw * 625;
/* DS2760 reports accumulated current in signed units of 0.25mAh. */
di->accum_current_raw =
(((signed char)di->raw[DS2760_CURRENT_ACCUM_MSB]) << 8) |
di->raw[DS2760_CURRENT_ACCUM_LSB];
di->accum_current_uAh = di->accum_current_raw * 250;
/* DS2760 reports temperature in signed units of 0.125°C, but the
* battery class reports in units of 1/10 °C, so we convert by
* multiplying by .125 * 10 = 1.25. */
di->temp_raw = (((signed char)di->raw[DS2760_TEMP_MSB]) << 3) |
(di->raw[DS2760_TEMP_LSB] >> 5);
di->temp_C = di->temp_raw + (di->temp_raw / 4);
/* At least some battery monitors (e.g. HP iPAQ) store the battery's
* maximum rated capacity. */
if (di->raw[DS2760_RATED_CAPACITY] < ARRAY_SIZE(rated_capacities))
di->rated_capacity = rated_capacities[
(unsigned int)di->raw[DS2760_RATED_CAPACITY]];
else
di->rated_capacity = di->raw[DS2760_RATED_CAPACITY] * 10;
di->rated_capacity *= 1000; /* convert to µAh */
/* Calculate the full level at the present temperature. */
di->full_active_uAh = di->raw[DS2760_ACTIVE_FULL] << 8 |
di->raw[DS2760_ACTIVE_FULL + 1];
/* If the full_active_uAh value is not given, fall back to the rated
* capacity. This is likely to happen when chips are not part of the
* battery pack and is therefore not bootstrapped. */
if (di->full_active_uAh == 0)
di->full_active_uAh = di->rated_capacity / 1000L;
scale[0] = di->full_active_uAh;
for (i = 1; i < 5; i++)
scale[i] = scale[i - 1] + di->raw[DS2760_ACTIVE_FULL + 1 + i];
di->full_active_uAh = battery_interpolate(scale, di->temp_C / 10);
di->full_active_uAh *= 1000; /* convert to µAh */
/* Calculate the empty level at the present temperature. */
scale[4] = di->raw[DS2760_ACTIVE_EMPTY + 4];
for (i = 3; i >= 0; i--)
scale[i] = scale[i + 1] + di->raw[DS2760_ACTIVE_EMPTY + i];
di->empty_uAh = battery_interpolate(scale, di->temp_C / 10);
di->empty_uAh *= 1000; /* convert to µAh */
if (di->full_active_uAh == di->empty_uAh)
di->rem_capacity = 0;
else
/* From Maxim Application Note 131: remaining capacity =
* ((ICA - Empty Value) / (Full Value - Empty Value)) x 100% */
di->rem_capacity = ((di->accum_current_uAh - di->empty_uAh) * 100L) /
(di->full_active_uAh - di->empty_uAh);
if (di->rem_capacity < 0)
di->rem_capacity = 0;
if (di->rem_capacity > 100)
di->rem_capacity = 100;
if (di->current_uA < -100L)
di->life_sec = -((di->accum_current_uAh - di->empty_uAh) * 36L)
/ (di->current_uA / 100L);
else
di->life_sec = 0;
return 0;
}
static void ds2760_battery_set_current_accum(struct ds2760_device_info *di,
unsigned int acr_val)
{
unsigned char acr[2];
/* acr is in units of 0.25 mAh */
acr_val *= 4L;
acr_val /= 1000;
acr[0] = acr_val >> 8;
acr[1] = acr_val & 0xff;
if (w1_ds2760_write(di->dev, acr, DS2760_CURRENT_ACCUM_MSB, 2) < 2)
dev_warn(di->dev, "ACR write failed\n");
}
static void ds2760_battery_update_status(struct ds2760_device_info *di)
{
int old_charge_status = di->charge_status;
ds2760_battery_read_status(di);
if (di->charge_status == POWER_SUPPLY_STATUS_UNKNOWN)
di->full_counter = 0;
if (power_supply_am_i_supplied(di->bat)) {
if (di->current_uA > 10000) {
di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
di->full_counter = 0;
} else if (di->current_uA < -5000) {
if (di->charge_status != POWER_SUPPLY_STATUS_NOT_CHARGING)
dev_notice(di->dev, "not enough power to "
"charge\n");
di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
di->full_counter = 0;
} else if (di->current_uA < 10000 &&
di->charge_status != POWER_SUPPLY_STATUS_FULL) {
/* Don't consider the battery to be full unless
* we've seen the current < 10 mA at least two
* consecutive times. */
di->full_counter++;
if (di->full_counter < 2) {
di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
} else {
di->charge_status = POWER_SUPPLY_STATUS_FULL;
ds2760_battery_set_current_accum(di,
di->full_active_uAh);
}
}
} else {
di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
di->full_counter = 0;
}
if (di->charge_status != old_charge_status)
power_supply_changed(di->bat);
}
static void ds2760_battery_write_status(struct ds2760_device_info *di,
char status)
{
if (status == di->raw[DS2760_STATUS_REG])
return;
w1_ds2760_write(di->dev, &status, DS2760_STATUS_WRITE_REG, 1);
w1_ds2760_store_eeprom(di->dev, DS2760_EEPROM_BLOCK1);
w1_ds2760_recall_eeprom(di->dev, DS2760_EEPROM_BLOCK1);
}
static void ds2760_battery_write_rated_capacity(struct ds2760_device_info *di,
unsigned char rated_capacity)
{
if (rated_capacity == di->raw[DS2760_RATED_CAPACITY])
return;
w1_ds2760_write(di->dev, &rated_capacity, DS2760_RATED_CAPACITY, 1);
w1_ds2760_store_eeprom(di->dev, DS2760_EEPROM_BLOCK1);
w1_ds2760_recall_eeprom(di->dev, DS2760_EEPROM_BLOCK1);
}
static void ds2760_battery_write_active_full(struct ds2760_device_info *di,
int active_full)
{
unsigned char tmp[2] = {
active_full >> 8,
active_full & 0xff
};
if (tmp[0] == di->raw[DS2760_ACTIVE_FULL] &&
tmp[1] == di->raw[DS2760_ACTIVE_FULL + 1])
return;
w1_ds2760_write(di->dev, tmp, DS2760_ACTIVE_FULL, sizeof(tmp));
w1_ds2760_store_eeprom(di->dev, DS2760_EEPROM_BLOCK0);
w1_ds2760_recall_eeprom(di->dev, DS2760_EEPROM_BLOCK0);
/* Write to the di->raw[] buffer directly - the DS2760_ACTIVE_FULL
* values won't be read back by ds2760_battery_read_status() */
di->raw[DS2760_ACTIVE_FULL] = tmp[0];
di->raw[DS2760_ACTIVE_FULL + 1] = tmp[1];
}
static void ds2760_battery_work(struct work_struct *work)
{
struct ds2760_device_info *di = container_of(work,
struct ds2760_device_info, monitor_work.work);
const int interval = HZ * 60;
dev_dbg(di->dev, "%s\n", __func__);
ds2760_battery_update_status(di);
queue_delayed_work(di->monitor_wqueue, &di->monitor_work, interval);
}
static void ds2760_battery_external_power_changed(struct power_supply *psy)
{
struct ds2760_device_info *di = power_supply_get_drvdata(psy);
dev_dbg(di->dev, "%s\n", __func__);
mod_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ/10);
}
static void ds2760_battery_set_charged_work(struct work_struct *work)
{
char bias;
struct ds2760_device_info *di = container_of(work,
struct ds2760_device_info, set_charged_work.work);
dev_dbg(di->dev, "%s\n", __func__);
ds2760_battery_read_status(di);
/* When we get notified by external circuitry that the battery is
* considered fully charged now, we know that there is no current
* flow any more. However, the ds2760's internal current meter is
* too inaccurate to rely on - spec say something ~15% failure.
* Hence, we use the current offset bias register to compensate
* that error.
*/
if (!power_supply_am_i_supplied(di->bat))
return;
bias = (signed char) di->current_raw +
(signed char) di->raw[DS2760_CURRENT_OFFSET_BIAS];
dev_dbg(di->dev, "%s: bias = %d\n", __func__, bias);
w1_ds2760_write(di->dev, &bias, DS2760_CURRENT_OFFSET_BIAS, 1);
w1_ds2760_store_eeprom(di->dev, DS2760_EEPROM_BLOCK1);
w1_ds2760_recall_eeprom(di->dev, DS2760_EEPROM_BLOCK1);
/* Write to the di->raw[] buffer directly - the CURRENT_OFFSET_BIAS
* value won't be read back by ds2760_battery_read_status() */
di->raw[DS2760_CURRENT_OFFSET_BIAS] = bias;
}
static void ds2760_battery_set_charged(struct power_supply *psy)
{
struct ds2760_device_info *di = power_supply_get_drvdata(psy);
/* postpone the actual work by 20 secs. This is for debouncing GPIO
* signals and to let the current value settle. See AN4188. */
mod_delayed_work(di->monitor_wqueue, &di->set_charged_work, HZ * 20);
}
static int ds2760_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct ds2760_device_info *di = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
val->intval = di->charge_status;
return 0;
default:
break;
}
ds2760_battery_read_status(di);
switch (psp) {
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = di->voltage_uV;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
val->intval = di->current_uA;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
val->intval = di->rated_capacity;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
val->intval = di->full_active_uAh;
break;
case POWER_SUPPLY_PROP_CHARGE_EMPTY:
val->intval = di->empty_uAh;
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
val->intval = di->accum_current_uAh;
break;
case POWER_SUPPLY_PROP_TEMP:
val->intval = di->temp_C;
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
val->intval = di->life_sec;
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = di->rem_capacity;
break;
default:
return -EINVAL;
}
return 0;
}
static int ds2760_battery_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct ds2760_device_info *di = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_FULL:
/* the interface counts in uAh, convert the value */
ds2760_battery_write_active_full(di, val->intval / 1000L);
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
/* ds2760_battery_set_current_accum() does the conversion */
ds2760_battery_set_current_accum(di, val->intval);
break;
default:
return -EPERM;
}
return 0;
}
static int ds2760_battery_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_FULL:
case POWER_SUPPLY_PROP_CHARGE_NOW:
return 1;
default:
break;
}
return 0;
}
static enum power_supply_property ds2760_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_EMPTY,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_CAPACITY,
};
static int ds2760_pm_notifier(struct notifier_block *notifier,
unsigned long pm_event,
void *unused)
{
struct ds2760_device_info *di =
container_of(notifier, struct ds2760_device_info, pm_notifier);
switch (pm_event) {
case PM_HIBERNATION_PREPARE:
case PM_SUSPEND_PREPARE:
di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
break;
case PM_POST_RESTORE:
case PM_POST_HIBERNATION:
case PM_POST_SUSPEND:
di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
power_supply_changed(di->bat);
mod_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ);
break;
case PM_RESTORE_PREPARE:
default:
break;
}
return NOTIFY_DONE;
}
static int w1_ds2760_add_slave(struct w1_slave *sl)
{
struct power_supply_config psy_cfg = {};
struct ds2760_device_info *di;
struct device *dev = &sl->dev;
int retval = 0;
char name[32];
char status;
di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
if (!di) {
retval = -ENOMEM;
goto di_alloc_failed;
}
snprintf(name, sizeof(name), "ds2760-battery.%d", dev->id);
di->dev = dev;
di->bat_desc.name = name;
di->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY;
di->bat_desc.properties = ds2760_battery_props;
di->bat_desc.num_properties = ARRAY_SIZE(ds2760_battery_props);
di->bat_desc.get_property = ds2760_battery_get_property;
di->bat_desc.set_property = ds2760_battery_set_property;
di->bat_desc.property_is_writeable =
ds2760_battery_property_is_writeable;
di->bat_desc.set_charged = ds2760_battery_set_charged;
di->bat_desc.external_power_changed =
ds2760_battery_external_power_changed;
psy_cfg.drv_data = di;
if (dev->of_node) {
u32 tmp;
psy_cfg.of_node = dev->of_node;
if (!of_property_read_bool(dev->of_node, "maxim,pmod-enabled"))
pmod_enabled = true;
if (!of_property_read_u32(dev->of_node,
"maxim,cache-time-ms", &tmp))
cache_time = tmp;
if (!of_property_read_u32(dev->of_node,
"rated-capacity-microamp-hours",
&tmp))
rated_capacity = tmp / 10; /* property is in mAh */
}
di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
sl->family_data = di;
/* enable sleep mode feature */
ds2760_battery_read_status(di);
status = di->raw[DS2760_STATUS_REG];
if (pmod_enabled)
status |= DS2760_STATUS_PMOD;
else
status &= ~DS2760_STATUS_PMOD;
ds2760_battery_write_status(di, status);
/* set rated capacity from module param or device tree */
if (rated_capacity)
ds2760_battery_write_rated_capacity(di, rated_capacity);
/* set current accumulator if given as parameter.
* this should only be done for bootstrapping the value */
if (current_accum)
ds2760_battery_set_current_accum(di, current_accum);
di->bat = power_supply_register(dev, &di->bat_desc, &psy_cfg);
if (IS_ERR(di->bat)) {
dev_err(di->dev, "failed to register battery\n");
retval = PTR_ERR(di->bat);
goto batt_failed;
}
INIT_DELAYED_WORK(&di->monitor_work, ds2760_battery_work);
INIT_DELAYED_WORK(&di->set_charged_work,
ds2760_battery_set_charged_work);
di->monitor_wqueue = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
if (!di->monitor_wqueue) {
retval = -ESRCH;
goto workqueue_failed;
}
queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ * 1);
di->pm_notifier.notifier_call = ds2760_pm_notifier;
register_pm_notifier(&di->pm_notifier);
goto success;
workqueue_failed:
power_supply_unregister(di->bat);
batt_failed:
di_alloc_failed:
success:
return retval;
}
static void w1_ds2760_remove_slave(struct w1_slave *sl)
{
struct ds2760_device_info *di = sl->family_data;
unregister_pm_notifier(&di->pm_notifier);
cancel_delayed_work_sync(&di->monitor_work);
cancel_delayed_work_sync(&di->set_charged_work);
destroy_workqueue(di->monitor_wqueue);
power_supply_unregister(di->bat);
}
#ifdef CONFIG_OF
static const struct of_device_id w1_ds2760_of_ids[] = {
{ .compatible = "maxim,ds2760" },
{}
};
#endif
static const struct w1_family_ops w1_ds2760_fops = {
.add_slave = w1_ds2760_add_slave,
.remove_slave = w1_ds2760_remove_slave,
.groups = w1_ds2760_groups,
};
static struct w1_family w1_ds2760_family = {
.fid = W1_FAMILY_DS2760,
.fops = &w1_ds2760_fops,
.of_match_table = of_match_ptr(w1_ds2760_of_ids),
};
module_w1_family(w1_ds2760_family);
MODULE_AUTHOR("Szabolcs Gyurko <[email protected]>, "
"Matt Reimer <[email protected]>, "
"Anton Vorontsov <[email protected]>");
MODULE_DESCRIPTION("1-wire Driver Dallas 2760 battery monitor chip");
MODULE_LICENSE("GPL");
MODULE_ALIAS("w1-family-" __stringify(W1_FAMILY_DS2760));
| linux-master | drivers/power/supply/ds2760_battery.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2022 Richtek Technology Corp.
*
* Author: ChiaEn Wu <[email protected]>
*/
#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/devm-helpers.h>
#include <linux/gpio/consumer.h>
#include <linux/iio/consumer.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/linear_range.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/workqueue.h>
#define MT6370_REG_CHG_CTRL1 0x111
#define MT6370_REG_CHG_CTRL2 0x112
#define MT6370_REG_CHG_CTRL3 0x113
#define MT6370_REG_CHG_CTRL4 0x114
#define MT6370_REG_CHG_CTRL5 0x115
#define MT6370_REG_CHG_CTRL6 0x116
#define MT6370_REG_CHG_CTRL7 0x117
#define MT6370_REG_CHG_CTRL8 0x118
#define MT6370_REG_CHG_CTRL9 0x119
#define MT6370_REG_CHG_CTRL10 0x11A
#define MT6370_REG_DEVICE_TYPE 0x122
#define MT6370_REG_USB_STATUS1 0x127
#define MT6370_REG_CHG_STAT 0x14A
#define MT6370_REG_FLED_EN 0x17E
#define MT6370_REG_CHG_STAT1 0X1D0
#define MT6370_REG_OVPCTRL_STAT 0x1D8
#define MT6370_VOBST_MASK GENMASK(7, 2)
#define MT6370_OTG_PIN_EN_MASK BIT(1)
#define MT6370_OPA_MODE_MASK BIT(0)
#define MT6370_OTG_OC_MASK GENMASK(2, 0)
#define MT6370_MIVR_IBUS_TH_100_mA 100000
#define MT6370_ADC_CHAN_IBUS 5
#define MT6370_ADC_CHAN_MAX 9
enum mt6370_chg_reg_field {
/* MT6370_REG_CHG_CTRL2 */
F_IINLMTSEL, F_CFO_EN, F_CHG_EN,
/* MT6370_REG_CHG_CTRL3 */
F_IAICR, F_AICR_EN, F_ILIM_EN,
/* MT6370_REG_CHG_CTRL4 */
F_VOREG,
/* MT6370_REG_CHG_CTRL6 */
F_VMIVR,
/* MT6370_REG_CHG_CTRL7 */
F_ICHG,
/* MT6370_REG_CHG_CTRL8 */
F_IPREC,
/* MT6370_REG_CHG_CTRL9 */
F_IEOC,
/* MT6370_REG_DEVICE_TYPE */
F_USBCHGEN,
/* MT6370_REG_USB_STATUS1 */
F_USB_STAT, F_CHGDET,
/* MT6370_REG_CHG_STAT */
F_CHG_STAT, F_BOOST_STAT, F_VBAT_LVL,
/* MT6370_REG_FLED_EN */
F_FL_STROBE,
/* MT6370_REG_CHG_STAT1 */
F_CHG_MIVR_STAT,
/* MT6370_REG_OVPCTRL_STAT */
F_UVP_D_STAT,
F_MAX
};
enum mt6370_irq {
MT6370_IRQ_ATTACH_I = 0,
MT6370_IRQ_UVP_D_EVT,
MT6370_IRQ_MIVR,
MT6370_IRQ_MAX
};
struct mt6370_priv {
struct device *dev;
struct iio_channel *iio_adcs;
struct mutex attach_lock;
struct power_supply *psy;
struct regmap *regmap;
struct regmap_field *rmap_fields[F_MAX];
struct regulator_dev *rdev;
struct workqueue_struct *wq;
struct work_struct bc12_work;
struct delayed_work mivr_dwork;
unsigned int irq_nums[MT6370_IRQ_MAX];
int attach;
int psy_usb_type;
bool pwr_rdy;
};
enum mt6370_usb_status {
MT6370_USB_STAT_NO_VBUS = 0,
MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING,
MT6370_USB_STAT_SDP,
MT6370_USB_STAT_SDP_NSTD,
MT6370_USB_STAT_DCP,
MT6370_USB_STAT_CDP,
MT6370_USB_STAT_MAX
};
struct mt6370_chg_field {
const char *name;
const struct linear_range *range;
struct reg_field field;
};
enum {
MT6370_RANGE_F_IAICR = 0,
MT6370_RANGE_F_VOREG,
MT6370_RANGE_F_VMIVR,
MT6370_RANGE_F_ICHG,
MT6370_RANGE_F_IPREC,
MT6370_RANGE_F_IEOC,
MT6370_RANGE_F_MAX
};
static const struct linear_range mt6370_chg_ranges[MT6370_RANGE_F_MAX] = {
LINEAR_RANGE_IDX(MT6370_RANGE_F_IAICR, 100000, 0x0, 0x3F, 50000),
LINEAR_RANGE_IDX(MT6370_RANGE_F_VOREG, 3900000, 0x0, 0x51, 10000),
LINEAR_RANGE_IDX(MT6370_RANGE_F_VMIVR, 3900000, 0x0, 0x5F, 100000),
LINEAR_RANGE_IDX(MT6370_RANGE_F_ICHG, 900000, 0x08, 0x31, 100000),
LINEAR_RANGE_IDX(MT6370_RANGE_F_IPREC, 100000, 0x0, 0x0F, 50000),
LINEAR_RANGE_IDX(MT6370_RANGE_F_IEOC, 100000, 0x0, 0x0F, 50000),
};
#define MT6370_CHG_FIELD(_fd, _reg, _lsb, _msb) \
[_fd] = { \
.name = #_fd, \
.range = NULL, \
.field = REG_FIELD(_reg, _lsb, _msb), \
}
#define MT6370_CHG_FIELD_RANGE(_fd, _reg, _lsb, _msb) \
[_fd] = { \
.name = #_fd, \
.range = &mt6370_chg_ranges[MT6370_RANGE_##_fd], \
.field = REG_FIELD(_reg, _lsb, _msb), \
}
static const struct mt6370_chg_field mt6370_chg_fields[F_MAX] = {
MT6370_CHG_FIELD(F_IINLMTSEL, MT6370_REG_CHG_CTRL2, 2, 3),
MT6370_CHG_FIELD(F_CFO_EN, MT6370_REG_CHG_CTRL2, 1, 1),
MT6370_CHG_FIELD(F_CHG_EN, MT6370_REG_CHG_CTRL2, 0, 0),
MT6370_CHG_FIELD_RANGE(F_IAICR, MT6370_REG_CHG_CTRL3, 2, 7),
MT6370_CHG_FIELD(F_AICR_EN, MT6370_REG_CHG_CTRL3, 1, 1),
MT6370_CHG_FIELD(F_ILIM_EN, MT6370_REG_CHG_CTRL3, 0, 0),
MT6370_CHG_FIELD_RANGE(F_VOREG, MT6370_REG_CHG_CTRL4, 1, 7),
MT6370_CHG_FIELD_RANGE(F_VMIVR, MT6370_REG_CHG_CTRL6, 1, 7),
MT6370_CHG_FIELD_RANGE(F_ICHG, MT6370_REG_CHG_CTRL7, 2, 7),
MT6370_CHG_FIELD_RANGE(F_IPREC, MT6370_REG_CHG_CTRL8, 0, 3),
MT6370_CHG_FIELD_RANGE(F_IEOC, MT6370_REG_CHG_CTRL9, 4, 7),
MT6370_CHG_FIELD(F_USBCHGEN, MT6370_REG_DEVICE_TYPE, 7, 7),
MT6370_CHG_FIELD(F_USB_STAT, MT6370_REG_USB_STATUS1, 4, 6),
MT6370_CHG_FIELD(F_CHGDET, MT6370_REG_USB_STATUS1, 3, 3),
MT6370_CHG_FIELD(F_CHG_STAT, MT6370_REG_CHG_STAT, 6, 7),
MT6370_CHG_FIELD(F_BOOST_STAT, MT6370_REG_CHG_STAT, 3, 3),
MT6370_CHG_FIELD(F_VBAT_LVL, MT6370_REG_CHG_STAT, 5, 5),
MT6370_CHG_FIELD(F_FL_STROBE, MT6370_REG_FLED_EN, 2, 2),
MT6370_CHG_FIELD(F_CHG_MIVR_STAT, MT6370_REG_CHG_STAT1, 6, 6),
MT6370_CHG_FIELD(F_UVP_D_STAT, MT6370_REG_OVPCTRL_STAT, 4, 4),
};
static inline int mt6370_chg_field_get(struct mt6370_priv *priv,
enum mt6370_chg_reg_field fd,
unsigned int *val)
{
int ret;
unsigned int reg_val;
ret = regmap_field_read(priv->rmap_fields[fd], ®_val);
if (ret)
return ret;
if (mt6370_chg_fields[fd].range)
return linear_range_get_value(mt6370_chg_fields[fd].range,
reg_val, val);
*val = reg_val;
return 0;
}
static inline int mt6370_chg_field_set(struct mt6370_priv *priv,
enum mt6370_chg_reg_field fd,
unsigned int val)
{
int ret;
bool f;
const struct linear_range *r;
if (mt6370_chg_fields[fd].range) {
r = mt6370_chg_fields[fd].range;
if (fd == F_VMIVR) {
ret = linear_range_get_selector_high(r, val, &val, &f);
if (ret)
val = r->max_sel;
} else {
linear_range_get_selector_within(r, val, &val);
}
}
return regmap_field_write(priv->rmap_fields[fd], val);
}
enum {
MT6370_CHG_STAT_READY = 0,
MT6370_CHG_STAT_CHARGE_IN_PROGRESS,
MT6370_CHG_STAT_DONE,
MT6370_CHG_STAT_FAULT,
MT6370_CHG_STAT_MAX
};
enum {
MT6370_ATTACH_STAT_DETACH = 0,
MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12,
MT6370_ATTACH_STAT_ATTACH_BC12_DONE,
MT6370_ATTACH_STAT_ATTACH_MAX
};
static int mt6370_chg_otg_of_parse_cb(struct device_node *of,
const struct regulator_desc *rdesc,
struct regulator_config *rcfg)
{
struct mt6370_priv *priv = rcfg->driver_data;
rcfg->ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(of),
"enable", 0, GPIOD_OUT_LOW |
GPIOD_FLAGS_BIT_NONEXCLUSIVE,
rdesc->name);
if (IS_ERR(rcfg->ena_gpiod)) {
rcfg->ena_gpiod = NULL;
return 0;
}
return regmap_update_bits(priv->regmap, MT6370_REG_CHG_CTRL1,
MT6370_OTG_PIN_EN_MASK,
MT6370_OTG_PIN_EN_MASK);
}
static void mt6370_chg_bc12_work_func(struct work_struct *work)
{
struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
bc12_work);
int ret;
bool rpt_psy = false;
unsigned int attach, usb_stat;
mutex_lock(&priv->attach_lock);
attach = priv->attach;
switch (attach) {
case MT6370_ATTACH_STAT_DETACH:
usb_stat = 0;
break;
case MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12:
ret = mt6370_chg_field_set(priv, F_USBCHGEN, attach);
if (ret)
dev_err(priv->dev, "Failed to enable USB CHG EN\n");
goto bc12_work_func_out;
case MT6370_ATTACH_STAT_ATTACH_BC12_DONE:
ret = mt6370_chg_field_get(priv, F_USB_STAT, &usb_stat);
if (ret) {
dev_err(priv->dev, "Failed to get USB status\n");
goto bc12_work_func_out;
}
break;
default:
dev_err(priv->dev, "Invalid attach state\n");
goto bc12_work_func_out;
}
rpt_psy = true;
switch (usb_stat) {
case MT6370_USB_STAT_SDP:
case MT6370_USB_STAT_SDP_NSTD:
priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
break;
case MT6370_USB_STAT_DCP:
priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
break;
case MT6370_USB_STAT_CDP:
priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
break;
case MT6370_USB_STAT_NO_VBUS:
case MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING:
default:
priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
break;
}
bc12_work_func_out:
mutex_unlock(&priv->attach_lock);
if (rpt_psy)
power_supply_changed(priv->psy);
}
static int mt6370_chg_toggle_cfo(struct mt6370_priv *priv)
{
int ret;
unsigned int fl_strobe;
/* check if flash led in strobe mode */
ret = mt6370_chg_field_get(priv, F_FL_STROBE, &fl_strobe);
if (ret) {
dev_err(priv->dev, "Failed to get FL_STROBE_EN\n");
return ret;
}
if (fl_strobe) {
dev_err(priv->dev, "Flash led is still in strobe mode\n");
return ret;
}
/* cfo off */
ret = mt6370_chg_field_set(priv, F_CFO_EN, 0);
if (ret) {
dev_err(priv->dev, "Failed to disable CFO_EN\n");
return ret;
}
/* cfo on */
ret = mt6370_chg_field_set(priv, F_CFO_EN, 1);
if (ret)
dev_err(priv->dev, "Failed to enable CFO_EN\n");
return ret;
}
static int mt6370_chg_read_adc_chan(struct mt6370_priv *priv, unsigned int chan,
int *val)
{
int ret;
if (chan >= MT6370_ADC_CHAN_MAX)
return -EINVAL;
ret = iio_read_channel_processed(&priv->iio_adcs[chan], val);
if (ret)
dev_err(priv->dev, "Failed to read ADC\n");
return ret;
}
static void mt6370_chg_mivr_dwork_func(struct work_struct *work)
{
struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
mivr_dwork.work);
int ret;
unsigned int mivr_stat, ibus;
ret = mt6370_chg_field_get(priv, F_CHG_MIVR_STAT, &mivr_stat);
if (ret) {
dev_err(priv->dev, "Failed to get mivr state\n");
goto mivr_handler_out;
}
if (!mivr_stat)
goto mivr_handler_out;
ret = mt6370_chg_read_adc_chan(priv, MT6370_ADC_CHAN_IBUS, &ibus);
if (ret) {
dev_err(priv->dev, "Failed to get ibus\n");
goto mivr_handler_out;
}
if (ibus < MT6370_MIVR_IBUS_TH_100_mA) {
ret = mt6370_chg_toggle_cfo(priv);
if (ret)
dev_err(priv->dev, "Failed to toggle cfo\n");
}
mivr_handler_out:
enable_irq(priv->irq_nums[MT6370_IRQ_MIVR]);
pm_relax(priv->dev);
}
static void mt6370_chg_pwr_rdy_check(struct mt6370_priv *priv)
{
int ret;
unsigned int opposite_pwr_rdy, otg_en;
union power_supply_propval val;
/* Check in OTG mode or not */
ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
if (ret) {
dev_err(priv->dev, "Failed to get OTG state\n");
return;
}
if (otg_en)
return;
ret = mt6370_chg_field_get(priv, F_UVP_D_STAT, &opposite_pwr_rdy);
if (ret) {
dev_err(priv->dev, "Failed to get opposite power ready state\n");
return;
}
val.intval = opposite_pwr_rdy ?
MT6370_ATTACH_STAT_DETACH :
MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12;
ret = power_supply_set_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
&val);
if (ret)
dev_err(priv->dev, "Failed to start attach/detach flow\n");
}
static int mt6370_chg_get_online(struct mt6370_priv *priv,
union power_supply_propval *val)
{
mutex_lock(&priv->attach_lock);
val->intval = !!priv->attach;
mutex_unlock(&priv->attach_lock);
return 0;
}
static int mt6370_chg_get_status(struct mt6370_priv *priv,
union power_supply_propval *val)
{
int ret;
unsigned int chg_stat;
union power_supply_propval online;
ret = power_supply_get_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
&online);
if (ret) {
dev_err(priv->dev, "Failed to get online status\n");
return ret;
}
if (!online.intval) {
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
return 0;
}
ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
if (ret)
return ret;
switch (chg_stat) {
case MT6370_CHG_STAT_READY:
case MT6370_CHG_STAT_FAULT:
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
return ret;
case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
val->intval = POWER_SUPPLY_STATUS_CHARGING;
return ret;
case MT6370_CHG_STAT_DONE:
val->intval = POWER_SUPPLY_STATUS_FULL;
return ret;
default:
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
return ret;
}
}
static int mt6370_chg_get_charge_type(struct mt6370_priv *priv,
union power_supply_propval *val)
{
int type, ret;
unsigned int chg_stat, vbat_lvl;
ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
if (ret)
return ret;
ret = mt6370_chg_field_get(priv, F_VBAT_LVL, &vbat_lvl);
if (ret)
return ret;
switch (chg_stat) {
case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
if (vbat_lvl)
type = POWER_SUPPLY_CHARGE_TYPE_FAST;
else
type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
case MT6370_CHG_STAT_READY:
case MT6370_CHG_STAT_DONE:
case MT6370_CHG_STAT_FAULT:
default:
type = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
}
val->intval = type;
return 0;
}
static int mt6370_chg_set_online(struct mt6370_priv *priv,
const union power_supply_propval *val)
{
bool pwr_rdy = !!val->intval;
mutex_lock(&priv->attach_lock);
if (pwr_rdy == !!priv->attach) {
dev_err(priv->dev, "pwr_rdy is same(%d)\n", pwr_rdy);
mutex_unlock(&priv->attach_lock);
return 0;
}
priv->attach = pwr_rdy;
mutex_unlock(&priv->attach_lock);
if (!queue_work(priv->wq, &priv->bc12_work))
dev_err(priv->dev, "bc12 work has already queued\n");
return 0;
}
static int mt6370_chg_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct mt6370_priv *priv = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
return mt6370_chg_get_online(priv, val);
case POWER_SUPPLY_PROP_STATUS:
return mt6370_chg_get_status(priv, val);
case POWER_SUPPLY_PROP_CHARGE_TYPE:
return mt6370_chg_get_charge_type(priv, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
return mt6370_chg_field_get(priv, F_ICHG, &val->intval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_ICHG]);
return 0;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
return mt6370_chg_field_get(priv, F_VOREG, &val->intval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_VOREG]);
return 0;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return mt6370_chg_field_get(priv, F_IAICR, &val->intval);
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
return mt6370_chg_field_get(priv, F_VMIVR, &val->intval);
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
return mt6370_chg_field_get(priv, F_IPREC, &val->intval);
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return mt6370_chg_field_get(priv, F_IEOC, &val->intval);
case POWER_SUPPLY_PROP_USB_TYPE:
val->intval = priv->psy_usb_type;
return 0;
default:
return -EINVAL;
}
}
static int mt6370_chg_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct mt6370_priv *priv = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
return mt6370_chg_set_online(priv, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
return mt6370_chg_field_set(priv, F_ICHG, val->intval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
return mt6370_chg_field_set(priv, F_VOREG, val->intval);
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return mt6370_chg_field_set(priv, F_IAICR, val->intval);
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
return mt6370_chg_field_set(priv, F_VMIVR, val->intval);
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
return mt6370_chg_field_set(priv, F_IPREC, val->intval);
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return mt6370_chg_field_set(priv, F_IEOC, val->intval);
default:
return -EINVAL;
}
}
static int mt6370_chg_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return 1;
default:
return 0;
}
}
static enum power_supply_property mt6370_chg_properties[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
POWER_SUPPLY_PROP_USB_TYPE,
};
static enum power_supply_usb_type mt6370_chg_usb_types[] = {
POWER_SUPPLY_USB_TYPE_UNKNOWN,
POWER_SUPPLY_USB_TYPE_SDP,
POWER_SUPPLY_USB_TYPE_CDP,
POWER_SUPPLY_USB_TYPE_DCP,
};
static const struct power_supply_desc mt6370_chg_psy_desc = {
.name = "mt6370-charger",
.type = POWER_SUPPLY_TYPE_USB,
.properties = mt6370_chg_properties,
.num_properties = ARRAY_SIZE(mt6370_chg_properties),
.get_property = mt6370_chg_get_property,
.set_property = mt6370_chg_set_property,
.property_is_writeable = mt6370_chg_property_is_writeable,
.usb_types = mt6370_chg_usb_types,
.num_usb_types = ARRAY_SIZE(mt6370_chg_usb_types),
};
static const struct regulator_ops mt6370_chg_otg_ops = {
.list_voltage = regulator_list_voltage_linear,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
.get_current_limit = regulator_get_current_limit_regmap,
};
static const u32 mt6370_chg_otg_oc_ma[] = {
500000, 700000, 1100000, 1300000, 1800000, 2100000, 2400000,
};
static const struct regulator_desc mt6370_chg_otg_rdesc = {
.of_match = "usb-otg-vbus-regulator",
.of_parse_cb = mt6370_chg_otg_of_parse_cb,
.name = "mt6370-usb-otg-vbus",
.ops = &mt6370_chg_otg_ops,
.owner = THIS_MODULE,
.type = REGULATOR_VOLTAGE,
.min_uV = 4425000,
.uV_step = 25000,
.n_voltages = 57,
.vsel_reg = MT6370_REG_CHG_CTRL5,
.vsel_mask = MT6370_VOBST_MASK,
.enable_reg = MT6370_REG_CHG_CTRL1,
.enable_mask = MT6370_OPA_MODE_MASK,
.curr_table = mt6370_chg_otg_oc_ma,
.n_current_limits = ARRAY_SIZE(mt6370_chg_otg_oc_ma),
.csel_reg = MT6370_REG_CHG_CTRL10,
.csel_mask = MT6370_OTG_OC_MASK,
};
static int mt6370_chg_init_rmap_fields(struct mt6370_priv *priv)
{
int i;
const struct mt6370_chg_field *fds = mt6370_chg_fields;
for (i = 0; i < F_MAX; i++) {
priv->rmap_fields[i] = devm_regmap_field_alloc(priv->dev,
priv->regmap,
fds[i].field);
if (IS_ERR(priv->rmap_fields[i]))
return dev_err_probe(priv->dev,
PTR_ERR(priv->rmap_fields[i]),
"Failed to allocate regmapfield[%s]\n",
fds[i].name);
}
return 0;
}
static int mt6370_chg_init_setting(struct mt6370_priv *priv)
{
int ret;
/* Disable usb_chg_en */
ret = mt6370_chg_field_set(priv, F_USBCHGEN, 0);
if (ret) {
dev_err(priv->dev, "Failed to disable usb_chg_en\n");
return ret;
}
/* Disable input current limit */
ret = mt6370_chg_field_set(priv, F_ILIM_EN, 0);
if (ret) {
dev_err(priv->dev, "Failed to disable input current limit\n");
return ret;
}
/* ICHG/IEOC Workaround, ICHG can not be set less than 900mA */
ret = mt6370_chg_field_set(priv, F_ICHG, 900000);
if (ret) {
dev_err(priv->dev, "Failed to set ICHG to 900mA");
return ret;
}
/* Change input current limit selection to using IAICR results */
ret = mt6370_chg_field_set(priv, F_IINLMTSEL, 2);
if (ret) {
dev_err(priv->dev, "Failed to set IINLMTSEL\n");
return ret;
}
return 0;
}
#define MT6370_CHG_DT_PROP_DECL(_name, _type, _field) \
{ \
.name = "mediatek,chg-" #_name, \
.type = MT6370_PARSE_TYPE_##_type, \
.fd = _field, \
}
static int mt6370_chg_init_otg_regulator(struct mt6370_priv *priv)
{
struct regulator_config rcfg = {
.dev = priv->dev,
.regmap = priv->regmap,
.driver_data = priv,
};
priv->rdev = devm_regulator_register(priv->dev, &mt6370_chg_otg_rdesc,
&rcfg);
return PTR_ERR_OR_ZERO(priv->rdev);
}
static int mt6370_chg_init_psy(struct mt6370_priv *priv)
{
struct power_supply_config cfg = {
.drv_data = priv,
.of_node = dev_of_node(priv->dev),
};
priv->psy = devm_power_supply_register(priv->dev, &mt6370_chg_psy_desc,
&cfg);
return PTR_ERR_OR_ZERO(priv->psy);
}
static void mt6370_chg_destroy_attach_lock(void *data)
{
struct mutex *attach_lock = data;
mutex_destroy(attach_lock);
}
static void mt6370_chg_destroy_wq(void *data)
{
struct workqueue_struct *wq = data;
flush_workqueue(wq);
destroy_workqueue(wq);
}
static irqreturn_t mt6370_attach_i_handler(int irq, void *data)
{
struct mt6370_priv *priv = data;
unsigned int otg_en;
int ret;
/* Check in OTG mode or not */
ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
if (ret) {
dev_err(priv->dev, "Failed to get OTG state\n");
return IRQ_NONE;
}
if (otg_en)
return IRQ_HANDLED;
mutex_lock(&priv->attach_lock);
priv->attach = MT6370_ATTACH_STAT_ATTACH_BC12_DONE;
mutex_unlock(&priv->attach_lock);
if (!queue_work(priv->wq, &priv->bc12_work))
dev_err(priv->dev, "bc12 work has already queued\n");
return IRQ_HANDLED;
}
static irqreturn_t mt6370_uvp_d_evt_handler(int irq, void *data)
{
struct mt6370_priv *priv = data;
mt6370_chg_pwr_rdy_check(priv);
return IRQ_HANDLED;
}
static irqreturn_t mt6370_mivr_handler(int irq, void *data)
{
struct mt6370_priv *priv = data;
pm_stay_awake(priv->dev);
disable_irq_nosync(priv->irq_nums[MT6370_IRQ_MIVR]);
schedule_delayed_work(&priv->mivr_dwork, msecs_to_jiffies(200));
return IRQ_HANDLED;
}
#define MT6370_CHG_IRQ(_name) \
{ \
.name = #_name, \
.handler = mt6370_##_name##_handler, \
}
static int mt6370_chg_init_irq(struct mt6370_priv *priv)
{
int i, ret;
const struct {
char *name;
irq_handler_t handler;
} mt6370_chg_irqs[] = {
MT6370_CHG_IRQ(attach_i),
MT6370_CHG_IRQ(uvp_d_evt),
MT6370_CHG_IRQ(mivr),
};
for (i = 0; i < ARRAY_SIZE(mt6370_chg_irqs); i++) {
ret = platform_get_irq_byname(to_platform_device(priv->dev),
mt6370_chg_irqs[i].name);
if (ret < 0)
return dev_err_probe(priv->dev, ret,
"Failed to get irq %s\n",
mt6370_chg_irqs[i].name);
priv->irq_nums[i] = ret;
ret = devm_request_threaded_irq(priv->dev, ret, NULL,
mt6370_chg_irqs[i].handler,
IRQF_TRIGGER_FALLING,
dev_name(priv->dev), priv);
if (ret)
return dev_err_probe(priv->dev, ret,
"Failed to request irq %s\n",
mt6370_chg_irqs[i].name);
}
return 0;
}
static int mt6370_chg_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct mt6370_priv *priv;
int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->dev = &pdev->dev;
priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!priv->regmap)
return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
ret = mt6370_chg_init_rmap_fields(priv);
if (ret)
return dev_err_probe(dev, ret, "Failed to init regmap fields\n");
platform_set_drvdata(pdev, priv);
priv->iio_adcs = devm_iio_channel_get_all(priv->dev);
if (IS_ERR(priv->iio_adcs))
return dev_err_probe(dev, PTR_ERR(priv->iio_adcs),
"Failed to get iio adc\n");
ret = mt6370_chg_init_otg_regulator(priv);
if (ret)
return dev_err_probe(dev, ret, "Failed to init OTG regulator\n");
ret = mt6370_chg_init_psy(priv);
if (ret)
return dev_err_probe(dev, ret, "Failed to init psy\n");
mutex_init(&priv->attach_lock);
ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_attach_lock,
&priv->attach_lock);
if (ret)
return dev_err_probe(dev, ret, "Failed to init attach lock\n");
priv->attach = MT6370_ATTACH_STAT_DETACH;
priv->wq = create_singlethread_workqueue(dev_name(priv->dev));
if (!priv->wq)
return dev_err_probe(dev, -ENOMEM,
"Failed to create workqueue\n");
ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_wq, priv->wq);
if (ret)
return dev_err_probe(dev, ret, "Failed to init wq\n");
ret = devm_work_autocancel(dev, &priv->bc12_work, mt6370_chg_bc12_work_func);
if (ret)
return dev_err_probe(dev, ret, "Failed to init bc12 work\n");
ret = devm_delayed_work_autocancel(dev, &priv->mivr_dwork, mt6370_chg_mivr_dwork_func);
if (ret)
return dev_err_probe(dev, ret, "Failed to init mivr delayed work\n");
ret = mt6370_chg_init_setting(priv);
if (ret)
return dev_err_probe(dev, ret,
"Failed to init mt6370 charger setting\n");
ret = mt6370_chg_init_irq(priv);
if (ret)
return ret;
mt6370_chg_pwr_rdy_check(priv);
return 0;
}
static const struct of_device_id mt6370_chg_of_match[] = {
{ .compatible = "mediatek,mt6370-charger", },
{}
};
MODULE_DEVICE_TABLE(of, mt6370_chg_of_match);
static struct platform_driver mt6370_chg_driver = {
.probe = mt6370_chg_probe,
.driver = {
.name = "mt6370-charger",
.of_match_table = mt6370_chg_of_match,
},
};
module_platform_driver(mt6370_chg_driver);
MODULE_AUTHOR("ChiaEn Wu <[email protected]>");
MODULE_DESCRIPTION("MediaTek MT6370 Charger Driver");
MODULE_LICENSE("GPL v2");
| linux-master | drivers/power/supply/mt6370-charger.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Battery driver for Maxim MAX8925
*
* Copyright (c) 2009-2010 Marvell International Ltd.
* Haojian Zhuang <[email protected]>
*/
#include <linux/module.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/mfd/max8925.h>
/* registers in GPM */
#define MAX8925_OUT5VEN 0x54
#define MAX8925_OUT3VEN 0x58
#define MAX8925_CHG_CNTL1 0x7c
/* bits definition */
#define MAX8925_CHG_STAT_VSYSLOW (1 << 0)
#define MAX8925_CHG_STAT_MODE_MASK (3 << 2)
#define MAX8925_CHG_STAT_EN_MASK (1 << 4)
#define MAX8925_CHG_MBDET (1 << 1)
#define MAX8925_CHG_AC_RANGE_MASK (3 << 6)
/* registers in ADC */
#define MAX8925_ADC_RES_CNFG1 0x06
#define MAX8925_ADC_AVG_CNFG1 0x07
#define MAX8925_ADC_ACQ_CNFG1 0x08
#define MAX8925_ADC_ACQ_CNFG2 0x09
/* 2 bytes registers in below. MSB is 1st, LSB is 2nd. */
#define MAX8925_ADC_AUX2 0x62
#define MAX8925_ADC_VCHG 0x64
#define MAX8925_ADC_VBBATT 0x66
#define MAX8925_ADC_VMBATT 0x68
#define MAX8925_ADC_ISNS 0x6a
#define MAX8925_ADC_THM 0x6c
#define MAX8925_ADC_TDIE 0x6e
#define MAX8925_CMD_AUX2 0xc8
#define MAX8925_CMD_VCHG 0xd0
#define MAX8925_CMD_VBBATT 0xd8
#define MAX8925_CMD_VMBATT 0xe0
#define MAX8925_CMD_ISNS 0xe8
#define MAX8925_CMD_THM 0xf0
#define MAX8925_CMD_TDIE 0xf8
enum {
MEASURE_AUX2,
MEASURE_VCHG,
MEASURE_VBBATT,
MEASURE_VMBATT,
MEASURE_ISNS,
MEASURE_THM,
MEASURE_TDIE,
MEASURE_MAX,
};
struct max8925_power_info {
struct max8925_chip *chip;
struct i2c_client *gpm;
struct i2c_client *adc;
struct power_supply *ac;
struct power_supply *usb;
struct power_supply *battery;
int irq_base;
unsigned ac_online:1;
unsigned usb_online:1;
unsigned bat_online:1;
unsigned chg_mode:2;
unsigned batt_detect:1; /* detecing MB by ID pin */
unsigned topoff_threshold:2;
unsigned fast_charge:3;
unsigned no_temp_support:1;
unsigned no_insert_detect:1;
int (*set_charger) (int);
};
static int __set_charger(struct max8925_power_info *info, int enable)
{
struct max8925_chip *chip = info->chip;
if (enable) {
/* enable charger in platform */
if (info->set_charger)
info->set_charger(1);
/* enable charger */
max8925_set_bits(info->gpm, MAX8925_CHG_CNTL1, 1 << 7, 0);
} else {
/* disable charge */
max8925_set_bits(info->gpm, MAX8925_CHG_CNTL1, 1 << 7, 1 << 7);
if (info->set_charger)
info->set_charger(0);
}
dev_dbg(chip->dev, "%s\n", (enable) ? "Enable charger"
: "Disable charger");
return 0;
}
static irqreturn_t max8925_charger_handler(int irq, void *data)
{
struct max8925_power_info *info = (struct max8925_power_info *)data;
struct max8925_chip *chip = info->chip;
switch (irq - chip->irq_base) {
case MAX8925_IRQ_VCHG_DC_R:
info->ac_online = 1;
__set_charger(info, 1);
dev_dbg(chip->dev, "Adapter inserted\n");
break;
case MAX8925_IRQ_VCHG_DC_F:
info->ac_online = 0;
__set_charger(info, 0);
dev_dbg(chip->dev, "Adapter removed\n");
break;
case MAX8925_IRQ_VCHG_THM_OK_F:
/* Battery is not ready yet */
dev_dbg(chip->dev, "Battery temperature is out of range\n");
fallthrough;
case MAX8925_IRQ_VCHG_DC_OVP:
dev_dbg(chip->dev, "Error detection\n");
__set_charger(info, 0);
break;
case MAX8925_IRQ_VCHG_THM_OK_R:
/* Battery is ready now */
dev_dbg(chip->dev, "Battery temperature is in range\n");
break;
case MAX8925_IRQ_VCHG_SYSLOW_R:
/* VSYS is low */
dev_info(chip->dev, "Sys power is too low\n");
break;
case MAX8925_IRQ_VCHG_SYSLOW_F:
dev_dbg(chip->dev, "Sys power is above low threshold\n");
break;
case MAX8925_IRQ_VCHG_DONE:
__set_charger(info, 0);
dev_dbg(chip->dev, "Charging is done\n");
break;
case MAX8925_IRQ_VCHG_TOPOFF:
dev_dbg(chip->dev, "Charging in top-off mode\n");
break;
case MAX8925_IRQ_VCHG_TMR_FAULT:
__set_charger(info, 0);
dev_dbg(chip->dev, "Safe timer is expired\n");
break;
case MAX8925_IRQ_VCHG_RST:
__set_charger(info, 0);
dev_dbg(chip->dev, "Charger is reset\n");
break;
}
return IRQ_HANDLED;
}
static int start_measure(struct max8925_power_info *info, int type)
{
unsigned char buf[2] = {0, 0};
int meas_cmd;
int meas_reg = 0, ret;
switch (type) {
case MEASURE_VCHG:
meas_cmd = MAX8925_CMD_VCHG;
meas_reg = MAX8925_ADC_VCHG;
break;
case MEASURE_VBBATT:
meas_cmd = MAX8925_CMD_VBBATT;
meas_reg = MAX8925_ADC_VBBATT;
break;
case MEASURE_VMBATT:
meas_cmd = MAX8925_CMD_VMBATT;
meas_reg = MAX8925_ADC_VMBATT;
break;
case MEASURE_ISNS:
meas_cmd = MAX8925_CMD_ISNS;
meas_reg = MAX8925_ADC_ISNS;
break;
default:
return -EINVAL;
}
max8925_reg_write(info->adc, meas_cmd, 0);
max8925_bulk_read(info->adc, meas_reg, 2, buf);
ret = ((buf[0]<<8) | buf[1]) >> 4;
return ret;
}
static int max8925_ac_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct max8925_power_info *info = dev_get_drvdata(psy->dev.parent);
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = info->ac_online;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
if (info->ac_online) {
ret = start_measure(info, MEASURE_VCHG);
if (ret >= 0) {
val->intval = ret * 2000; /* unit is uV */
goto out;
}
}
ret = -ENODATA;
break;
default:
ret = -ENODEV;
break;
}
out:
return ret;
}
static enum power_supply_property max8925_ac_props[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
};
static int max8925_usb_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct max8925_power_info *info = dev_get_drvdata(psy->dev.parent);
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = info->usb_online;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
if (info->usb_online) {
ret = start_measure(info, MEASURE_VCHG);
if (ret >= 0) {
val->intval = ret * 2000; /* unit is uV */
goto out;
}
}
ret = -ENODATA;
break;
default:
ret = -ENODEV;
break;
}
out:
return ret;
}
static enum power_supply_property max8925_usb_props[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
};
static int max8925_bat_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct max8925_power_info *info = dev_get_drvdata(psy->dev.parent);
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = info->bat_online;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
if (info->bat_online) {
ret = start_measure(info, MEASURE_VMBATT);
if (ret >= 0) {
val->intval = ret * 2000; /* unit is uV */
ret = 0;
break;
}
}
ret = -ENODATA;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
if (info->bat_online) {
ret = start_measure(info, MEASURE_ISNS);
if (ret >= 0) {
/* assume r_sns is 0.02 */
ret = ((ret * 6250) - 3125) /* uA */;
val->intval = 0;
if (ret > 0)
val->intval = ret; /* unit is mA */
ret = 0;
break;
}
}
ret = -ENODATA;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
if (!info->bat_online) {
ret = -ENODATA;
break;
}
ret = max8925_reg_read(info->gpm, MAX8925_CHG_STATUS);
ret = (ret & MAX8925_CHG_STAT_MODE_MASK) >> 2;
switch (ret) {
case 1:
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
case 0:
case 2:
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
case 3:
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
}
ret = 0;
break;
case POWER_SUPPLY_PROP_STATUS:
if (!info->bat_online) {
ret = -ENODATA;
break;
}
ret = max8925_reg_read(info->gpm, MAX8925_CHG_STATUS);
if (info->usb_online || info->ac_online) {
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
if (ret & MAX8925_CHG_STAT_EN_MASK)
val->intval = POWER_SUPPLY_STATUS_CHARGING;
} else
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
ret = 0;
break;
default:
ret = -ENODEV;
break;
}
return ret;
}
static enum power_supply_property max8925_battery_props[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_STATUS,
};
static const struct power_supply_desc ac_desc = {
.name = "max8925-ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = max8925_ac_props,
.num_properties = ARRAY_SIZE(max8925_ac_props),
.get_property = max8925_ac_get_prop,
};
static const struct power_supply_desc usb_desc = {
.name = "max8925-usb",
.type = POWER_SUPPLY_TYPE_USB,
.properties = max8925_usb_props,
.num_properties = ARRAY_SIZE(max8925_usb_props),
.get_property = max8925_usb_get_prop,
};
static const struct power_supply_desc battery_desc = {
.name = "max8925-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = max8925_battery_props,
.num_properties = ARRAY_SIZE(max8925_battery_props),
.get_property = max8925_bat_get_prop,
};
#define REQUEST_IRQ(_irq, _name) \
do { \
ret = request_threaded_irq(chip->irq_base + _irq, NULL, \
max8925_charger_handler, \
IRQF_ONESHOT, _name, info); \
if (ret) \
dev_err(chip->dev, "Failed to request IRQ #%d: %d\n", \
_irq, ret); \
} while (0)
static int max8925_init_charger(struct max8925_chip *chip,
struct max8925_power_info *info)
{
int ret;
REQUEST_IRQ(MAX8925_IRQ_VCHG_DC_OVP, "ac-ovp");
if (!info->no_insert_detect) {
REQUEST_IRQ(MAX8925_IRQ_VCHG_DC_F, "ac-remove");
REQUEST_IRQ(MAX8925_IRQ_VCHG_DC_R, "ac-insert");
}
if (!info->no_temp_support) {
REQUEST_IRQ(MAX8925_IRQ_VCHG_THM_OK_R, "batt-temp-in-range");
REQUEST_IRQ(MAX8925_IRQ_VCHG_THM_OK_F, "batt-temp-out-range");
}
REQUEST_IRQ(MAX8925_IRQ_VCHG_SYSLOW_F, "vsys-high");
REQUEST_IRQ(MAX8925_IRQ_VCHG_SYSLOW_R, "vsys-low");
REQUEST_IRQ(MAX8925_IRQ_VCHG_RST, "charger-reset");
REQUEST_IRQ(MAX8925_IRQ_VCHG_DONE, "charger-done");
REQUEST_IRQ(MAX8925_IRQ_VCHG_TOPOFF, "charger-topoff");
REQUEST_IRQ(MAX8925_IRQ_VCHG_TMR_FAULT, "charger-timer-expire");
info->usb_online = 0;
info->bat_online = 0;
/* check for power - can miss interrupt at boot time */
if (start_measure(info, MEASURE_VCHG) * 2000 > 500000)
info->ac_online = 1;
else
info->ac_online = 0;
ret = max8925_reg_read(info->gpm, MAX8925_CHG_STATUS);
if (ret >= 0) {
/*
* If battery detection is enabled, ID pin of battery is
* connected to MBDET pin of MAX8925. It could be used to
* detect battery presence.
* Otherwise, we have to assume that battery is always on.
*/
if (info->batt_detect)
info->bat_online = (ret & MAX8925_CHG_MBDET) ? 0 : 1;
else
info->bat_online = 1;
if (ret & MAX8925_CHG_AC_RANGE_MASK)
info->ac_online = 1;
else
info->ac_online = 0;
}
/* disable charge */
max8925_set_bits(info->gpm, MAX8925_CHG_CNTL1, 1 << 7, 1 << 7);
/* set charging current in charge topoff mode */
max8925_set_bits(info->gpm, MAX8925_CHG_CNTL1, 3 << 5,
info->topoff_threshold << 5);
/* set charing current in fast charge mode */
max8925_set_bits(info->gpm, MAX8925_CHG_CNTL1, 7, info->fast_charge);
return 0;
}
static int max8925_deinit_charger(struct max8925_power_info *info)
{
struct max8925_chip *chip = info->chip;
int irq;
irq = chip->irq_base + MAX8925_IRQ_VCHG_DC_OVP;
for (; irq <= chip->irq_base + MAX8925_IRQ_VCHG_TMR_FAULT; irq++)
free_irq(irq, info);
return 0;
}
#ifdef CONFIG_OF
static struct max8925_power_pdata *
max8925_power_dt_init(struct platform_device *pdev)
{
struct device_node *nproot = pdev->dev.parent->of_node;
struct device_node *np;
int batt_detect;
int topoff_threshold;
int fast_charge;
int no_temp_support;
int no_insert_detect;
struct max8925_power_pdata *pdata;
if (!nproot)
return pdev->dev.platform_data;
np = of_get_child_by_name(nproot, "charger");
if (!np) {
dev_err(&pdev->dev, "failed to find charger node\n");
return NULL;
}
pdata = devm_kzalloc(&pdev->dev,
sizeof(struct max8925_power_pdata),
GFP_KERNEL);
if (!pdata)
goto ret;
of_property_read_u32(np, "topoff-threshold", &topoff_threshold);
of_property_read_u32(np, "batt-detect", &batt_detect);
of_property_read_u32(np, "fast-charge", &fast_charge);
of_property_read_u32(np, "no-insert-detect", &no_insert_detect);
of_property_read_u32(np, "no-temp-support", &no_temp_support);
pdata->batt_detect = batt_detect;
pdata->fast_charge = fast_charge;
pdata->topoff_threshold = topoff_threshold;
pdata->no_insert_detect = no_insert_detect;
pdata->no_temp_support = no_temp_support;
ret:
of_node_put(np);
return pdata;
}
#else
static struct max8925_power_pdata *
max8925_power_dt_init(struct platform_device *pdev)
{
return pdev->dev.platform_data;
}
#endif
static int max8925_power_probe(struct platform_device *pdev)
{
struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
struct power_supply_config psy_cfg = {}; /* Only for ac and usb */
struct max8925_power_pdata *pdata = NULL;
struct max8925_power_info *info;
int ret;
pdata = max8925_power_dt_init(pdev);
if (!pdata) {
dev_err(&pdev->dev, "platform data isn't assigned to "
"power supply\n");
return -EINVAL;
}
info = devm_kzalloc(&pdev->dev, sizeof(struct max8925_power_info),
GFP_KERNEL);
if (!info)
return -ENOMEM;
info->chip = chip;
info->gpm = chip->i2c;
info->adc = chip->adc;
platform_set_drvdata(pdev, info);
psy_cfg.supplied_to = pdata->supplied_to;
psy_cfg.num_supplicants = pdata->num_supplicants;
info->ac = power_supply_register(&pdev->dev, &ac_desc, &psy_cfg);
if (IS_ERR(info->ac)) {
ret = PTR_ERR(info->ac);
goto out;
}
info->ac->dev.parent = &pdev->dev;
info->usb = power_supply_register(&pdev->dev, &usb_desc, &psy_cfg);
if (IS_ERR(info->usb)) {
ret = PTR_ERR(info->usb);
goto out_unregister_ac;
}
info->usb->dev.parent = &pdev->dev;
info->battery = power_supply_register(&pdev->dev, &battery_desc, NULL);
if (IS_ERR(info->battery)) {
ret = PTR_ERR(info->battery);
goto out_unregister_usb;
}
info->battery->dev.parent = &pdev->dev;
info->batt_detect = pdata->batt_detect;
info->topoff_threshold = pdata->topoff_threshold;
info->fast_charge = pdata->fast_charge;
info->set_charger = pdata->set_charger;
info->no_temp_support = pdata->no_temp_support;
info->no_insert_detect = pdata->no_insert_detect;
max8925_init_charger(chip, info);
return 0;
out_unregister_usb:
power_supply_unregister(info->usb);
out_unregister_ac:
power_supply_unregister(info->ac);
out:
return ret;
}
static int max8925_power_remove(struct platform_device *pdev)
{
struct max8925_power_info *info = platform_get_drvdata(pdev);
if (info) {
power_supply_unregister(info->ac);
power_supply_unregister(info->usb);
power_supply_unregister(info->battery);
max8925_deinit_charger(info);
}
return 0;
}
static struct platform_driver max8925_power_driver = {
.probe = max8925_power_probe,
.remove = max8925_power_remove,
.driver = {
.name = "max8925-power",
},
};
module_platform_driver(max8925_power_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Power supply driver for MAX8925");
MODULE_ALIAS("platform:max8925-power");
| linux-master | drivers/power/supply/max8925_power.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Power supply driver for the Active-semi ACT8945A PMIC
*
* Copyright (C) 2015 Atmel Corporation
*
* Author: Wenyou Yang <[email protected]>
*/
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/gpio/consumer.h>
static const char *act8945a_charger_model = "ACT8945A";
static const char *act8945a_charger_manufacturer = "Active-semi";
/*
* ACT8945A Charger Register Map
*/
/* 0x70: Reserved */
#define ACT8945A_APCH_CFG 0x71
#define ACT8945A_APCH_STATUS 0x78
#define ACT8945A_APCH_CTRL 0x79
#define ACT8945A_APCH_STATE 0x7A
/* ACT8945A_APCH_CFG */
#define APCH_CFG_OVPSET (0x3 << 0)
#define APCH_CFG_OVPSET_6V6 (0x0 << 0)
#define APCH_CFG_OVPSET_7V (0x1 << 0)
#define APCH_CFG_OVPSET_7V5 (0x2 << 0)
#define APCH_CFG_OVPSET_8V (0x3 << 0)
#define APCH_CFG_PRETIMO (0x3 << 2)
#define APCH_CFG_PRETIMO_40_MIN (0x0 << 2)
#define APCH_CFG_PRETIMO_60_MIN (0x1 << 2)
#define APCH_CFG_PRETIMO_80_MIN (0x2 << 2)
#define APCH_CFG_PRETIMO_DISABLED (0x3 << 2)
#define APCH_CFG_TOTTIMO (0x3 << 4)
#define APCH_CFG_TOTTIMO_3_HOUR (0x0 << 4)
#define APCH_CFG_TOTTIMO_4_HOUR (0x1 << 4)
#define APCH_CFG_TOTTIMO_5_HOUR (0x2 << 4)
#define APCH_CFG_TOTTIMO_DISABLED (0x3 << 4)
#define APCH_CFG_SUSCHG (0x1 << 7)
#define APCH_STATUS_CHGDAT BIT(0)
#define APCH_STATUS_INDAT BIT(1)
#define APCH_STATUS_TEMPDAT BIT(2)
#define APCH_STATUS_TIMRDAT BIT(3)
#define APCH_STATUS_CHGSTAT BIT(4)
#define APCH_STATUS_INSTAT BIT(5)
#define APCH_STATUS_TEMPSTAT BIT(6)
#define APCH_STATUS_TIMRSTAT BIT(7)
#define APCH_CTRL_CHGEOCOUT BIT(0)
#define APCH_CTRL_INDIS BIT(1)
#define APCH_CTRL_TEMPOUT BIT(2)
#define APCH_CTRL_TIMRPRE BIT(3)
#define APCH_CTRL_CHGEOCIN BIT(4)
#define APCH_CTRL_INCON BIT(5)
#define APCH_CTRL_TEMPIN BIT(6)
#define APCH_CTRL_TIMRTOT BIT(7)
#define APCH_STATE_ACINSTAT (0x1 << 1)
#define APCH_STATE_CSTATE (0x3 << 4)
#define APCH_STATE_CSTATE_SHIFT 4
#define APCH_STATE_CSTATE_DISABLED 0x00
#define APCH_STATE_CSTATE_EOC 0x01
#define APCH_STATE_CSTATE_FAST 0x02
#define APCH_STATE_CSTATE_PRE 0x03
struct act8945a_charger {
struct power_supply *psy;
struct power_supply_desc desc;
struct regmap *regmap;
struct work_struct work;
bool init_done;
struct gpio_desc *lbo_gpio;
struct gpio_desc *chglev_gpio;
};
static int act8945a_get_charger_state(struct regmap *regmap, int *val)
{
int ret;
unsigned int status, state;
ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
if (ret < 0)
return ret;
ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
if (ret < 0)
return ret;
state &= APCH_STATE_CSTATE;
state >>= APCH_STATE_CSTATE_SHIFT;
switch (state) {
case APCH_STATE_CSTATE_PRE:
case APCH_STATE_CSTATE_FAST:
*val = POWER_SUPPLY_STATUS_CHARGING;
break;
case APCH_STATE_CSTATE_EOC:
if (status & APCH_STATUS_CHGDAT)
*val = POWER_SUPPLY_STATUS_FULL;
else
*val = POWER_SUPPLY_STATUS_CHARGING;
break;
case APCH_STATE_CSTATE_DISABLED:
default:
if (!(status & APCH_STATUS_INDAT))
*val = POWER_SUPPLY_STATUS_DISCHARGING;
else
*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
}
return 0;
}
static int act8945a_get_charge_type(struct regmap *regmap, int *val)
{
int ret;
unsigned int status, state;
ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
if (ret < 0)
return ret;
ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
if (ret < 0)
return ret;
state &= APCH_STATE_CSTATE;
state >>= APCH_STATE_CSTATE_SHIFT;
switch (state) {
case APCH_STATE_CSTATE_PRE:
*val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
case APCH_STATE_CSTATE_FAST:
*val = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
case APCH_STATE_CSTATE_EOC:
*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
case APCH_STATE_CSTATE_DISABLED:
default:
if (!(status & APCH_STATUS_INDAT))
*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
else
*val = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
break;
}
return 0;
}
static int act8945a_get_battery_health(struct regmap *regmap, int *val)
{
int ret;
unsigned int status, state, config;
ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
if (ret < 0)
return ret;
ret = regmap_read(regmap, ACT8945A_APCH_CFG, &config);
if (ret < 0)
return ret;
ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
if (ret < 0)
return ret;
state &= APCH_STATE_CSTATE;
state >>= APCH_STATE_CSTATE_SHIFT;
switch (state) {
case APCH_STATE_CSTATE_DISABLED:
if (config & APCH_CFG_SUSCHG) {
*val = POWER_SUPPLY_HEALTH_UNKNOWN;
} else if (status & APCH_STATUS_INDAT) {
if (!(status & APCH_STATUS_TEMPDAT))
*val = POWER_SUPPLY_HEALTH_OVERHEAT;
else if (status & APCH_STATUS_TIMRDAT)
*val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
else
*val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
} else {
*val = POWER_SUPPLY_HEALTH_GOOD;
}
break;
case APCH_STATE_CSTATE_PRE:
case APCH_STATE_CSTATE_FAST:
case APCH_STATE_CSTATE_EOC:
default:
*val = POWER_SUPPLY_HEALTH_GOOD;
break;
}
return 0;
}
static int act8945a_get_capacity_level(struct act8945a_charger *charger,
struct regmap *regmap, int *val)
{
int ret;
unsigned int status, state, config;
int lbo_level = gpiod_get_value(charger->lbo_gpio);
ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
if (ret < 0)
return ret;
ret = regmap_read(regmap, ACT8945A_APCH_CFG, &config);
if (ret < 0)
return ret;
ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
if (ret < 0)
return ret;
state &= APCH_STATE_CSTATE;
state >>= APCH_STATE_CSTATE_SHIFT;
switch (state) {
case APCH_STATE_CSTATE_PRE:
*val = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
break;
case APCH_STATE_CSTATE_FAST:
if (lbo_level)
*val = POWER_SUPPLY_CAPACITY_LEVEL_HIGH;
else
*val = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
break;
case APCH_STATE_CSTATE_EOC:
if (status & APCH_STATUS_CHGDAT)
*val = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
else
*val = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
break;
case APCH_STATE_CSTATE_DISABLED:
default:
if (config & APCH_CFG_SUSCHG) {
*val = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
} else {
*val = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
if (!(status & APCH_STATUS_INDAT)) {
if (!lbo_level)
*val = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
}
}
break;
}
return 0;
}
#define MAX_CURRENT_USB_HIGH 450000
#define MAX_CURRENT_USB_LOW 90000
#define MAX_CURRENT_USB_PRE 45000
/*
* Riset(K) = 2336 * (1V/Ichg(mA)) - 0.205
* Riset = 2.43K
*/
#define MAX_CURRENT_AC_HIGH 886527
#define MAX_CURRENT_AC_LOW 117305
#define MAX_CURRENT_AC_HIGH_PRE 88653
#define MAX_CURRENT_AC_LOW_PRE 11731
static int act8945a_get_current_max(struct act8945a_charger *charger,
struct regmap *regmap, int *val)
{
int ret;
unsigned int status, state;
unsigned int acin_state;
int chgin_level = gpiod_get_value(charger->chglev_gpio);
ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
if (ret < 0)
return ret;
ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
if (ret < 0)
return ret;
acin_state = (state & APCH_STATE_ACINSTAT) >> 1;
state &= APCH_STATE_CSTATE;
state >>= APCH_STATE_CSTATE_SHIFT;
switch (state) {
case APCH_STATE_CSTATE_PRE:
if (acin_state) {
if (chgin_level)
*val = MAX_CURRENT_AC_HIGH_PRE;
else
*val = MAX_CURRENT_AC_LOW_PRE;
} else {
*val = MAX_CURRENT_USB_PRE;
}
break;
case APCH_STATE_CSTATE_FAST:
if (acin_state) {
if (chgin_level)
*val = MAX_CURRENT_AC_HIGH;
else
*val = MAX_CURRENT_AC_LOW;
} else {
if (chgin_level)
*val = MAX_CURRENT_USB_HIGH;
else
*val = MAX_CURRENT_USB_LOW;
}
break;
case APCH_STATE_CSTATE_EOC:
case APCH_STATE_CSTATE_DISABLED:
default:
*val = 0;
break;
}
return 0;
}
static enum power_supply_property act8945a_charger_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER
};
static int act8945a_charger_get_property(struct power_supply *psy,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct act8945a_charger *charger = power_supply_get_drvdata(psy);
struct regmap *regmap = charger->regmap;
int ret = 0;
switch (prop) {
case POWER_SUPPLY_PROP_STATUS:
ret = act8945a_get_charger_state(regmap, &val->intval);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
ret = act8945a_get_charge_type(regmap, &val->intval);
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
break;
case POWER_SUPPLY_PROP_HEALTH:
ret = act8945a_get_battery_health(regmap, &val->intval);
break;
case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
ret = act8945a_get_capacity_level(charger,
regmap, &val->intval);
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
ret = act8945a_get_current_max(charger,
regmap, &val->intval);
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = act8945a_charger_model;
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = act8945a_charger_manufacturer;
break;
default:
return -EINVAL;
}
return ret;
}
static int act8945a_enable_interrupt(struct act8945a_charger *charger)
{
struct regmap *regmap = charger->regmap;
unsigned char ctrl;
int ret;
ctrl = APCH_CTRL_CHGEOCOUT | APCH_CTRL_CHGEOCIN |
APCH_CTRL_INDIS | APCH_CTRL_INCON |
APCH_CTRL_TEMPOUT | APCH_CTRL_TEMPIN |
APCH_CTRL_TIMRPRE | APCH_CTRL_TIMRTOT;
ret = regmap_write(regmap, ACT8945A_APCH_CTRL, ctrl);
if (ret)
return ret;
ctrl = APCH_STATUS_CHGSTAT | APCH_STATUS_INSTAT |
APCH_STATUS_TEMPSTAT | APCH_STATUS_TIMRSTAT;
ret = regmap_write(regmap, ACT8945A_APCH_STATUS, ctrl);
if (ret)
return ret;
return 0;
}
static unsigned int act8945a_set_supply_type(struct act8945a_charger *charger,
unsigned int *type)
{
unsigned int status, state;
int ret;
ret = regmap_read(charger->regmap, ACT8945A_APCH_STATUS, &status);
if (ret < 0)
return ret;
ret = regmap_read(charger->regmap, ACT8945A_APCH_STATE, &state);
if (ret < 0)
return ret;
if (status & APCH_STATUS_INDAT) {
if (state & APCH_STATE_ACINSTAT)
*type = POWER_SUPPLY_TYPE_MAINS;
else
*type = POWER_SUPPLY_TYPE_USB;
} else {
*type = POWER_SUPPLY_TYPE_BATTERY;
}
return 0;
}
static void act8945a_work(struct work_struct *work)
{
struct act8945a_charger *charger =
container_of(work, struct act8945a_charger, work);
act8945a_set_supply_type(charger, &charger->desc.type);
power_supply_changed(charger->psy);
}
static irqreturn_t act8945a_status_changed(int irq, void *dev_id)
{
struct act8945a_charger *charger = dev_id;
if (charger->init_done)
schedule_work(&charger->work);
return IRQ_HANDLED;
}
#define DEFAULT_TOTAL_TIME_OUT 3
#define DEFAULT_PRE_TIME_OUT 40
#define DEFAULT_INPUT_OVP_THRESHOLD 6600
static int act8945a_charger_config(struct device *dev,
struct act8945a_charger *charger)
{
struct device_node *np = dev->of_node;
struct regmap *regmap = charger->regmap;
u32 total_time_out;
u32 pre_time_out;
u32 input_voltage_threshold;
int err, ret;
unsigned int tmp;
unsigned int value = 0;
if (!np) {
dev_err(dev, "no charger of node\n");
return -EINVAL;
}
ret = regmap_read(regmap, ACT8945A_APCH_CFG, &tmp);
if (ret)
return ret;
if (tmp & APCH_CFG_SUSCHG) {
value |= APCH_CFG_SUSCHG;
dev_info(dev, "have been suspended\n");
}
charger->lbo_gpio = devm_gpiod_get_optional(dev, "active-semi,lbo",
GPIOD_IN);
if (IS_ERR(charger->lbo_gpio)) {
err = PTR_ERR(charger->lbo_gpio);
dev_err(dev, "unable to claim gpio \"lbo\": %d\n", err);
return err;
}
ret = devm_request_irq(dev, gpiod_to_irq(charger->lbo_gpio),
act8945a_status_changed,
(IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING),
"act8945a_lbo_detect", charger);
if (ret)
dev_info(dev, "failed to request gpio \"lbo\" IRQ\n");
charger->chglev_gpio = devm_gpiod_get_optional(dev,
"active-semi,chglev",
GPIOD_IN);
if (IS_ERR(charger->chglev_gpio)) {
err = PTR_ERR(charger->chglev_gpio);
dev_err(dev, "unable to claim gpio \"chglev\": %d\n", err);
return err;
}
if (of_property_read_u32(np,
"active-semi,input-voltage-threshold-microvolt",
&input_voltage_threshold))
input_voltage_threshold = DEFAULT_INPUT_OVP_THRESHOLD;
if (of_property_read_u32(np,
"active-semi,precondition-timeout",
&pre_time_out))
pre_time_out = DEFAULT_PRE_TIME_OUT;
if (of_property_read_u32(np, "active-semi,total-timeout",
&total_time_out))
total_time_out = DEFAULT_TOTAL_TIME_OUT;
switch (input_voltage_threshold) {
case 8000:
value |= APCH_CFG_OVPSET_8V;
break;
case 7500:
value |= APCH_CFG_OVPSET_7V5;
break;
case 7000:
value |= APCH_CFG_OVPSET_7V;
break;
case 6600:
default:
value |= APCH_CFG_OVPSET_6V6;
break;
}
switch (pre_time_out) {
case 60:
value |= APCH_CFG_PRETIMO_60_MIN;
break;
case 80:
value |= APCH_CFG_PRETIMO_80_MIN;
break;
case 0:
value |= APCH_CFG_PRETIMO_DISABLED;
break;
case 40:
default:
value |= APCH_CFG_PRETIMO_40_MIN;
break;
}
switch (total_time_out) {
case 4:
value |= APCH_CFG_TOTTIMO_4_HOUR;
break;
case 5:
value |= APCH_CFG_TOTTIMO_5_HOUR;
break;
case 0:
value |= APCH_CFG_TOTTIMO_DISABLED;
break;
case 3:
default:
value |= APCH_CFG_TOTTIMO_3_HOUR;
break;
}
return regmap_write(regmap, ACT8945A_APCH_CFG, value);
}
static int act8945a_charger_probe(struct platform_device *pdev)
{
struct act8945a_charger *charger;
struct power_supply_config psy_cfg = {};
int irq, ret;
charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
if (!charger)
return -ENOMEM;
charger->regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!charger->regmap) {
dev_err(&pdev->dev, "Parent did not provide regmap\n");
return -EINVAL;
}
ret = act8945a_charger_config(&pdev->dev, charger);
if (ret)
return ret;
irq = of_irq_get(pdev->dev.of_node, 0);
if (irq <= 0) {
dev_err(&pdev->dev, "failed to find IRQ number\n");
return irq ?: -ENXIO;
}
ret = devm_request_irq(&pdev->dev, irq, act8945a_status_changed,
IRQF_TRIGGER_FALLING, "act8945a_interrupt",
charger);
if (ret) {
dev_err(&pdev->dev, "failed to request nIRQ pin IRQ\n");
return ret;
}
charger->desc.name = "act8945a-charger";
charger->desc.get_property = act8945a_charger_get_property;
charger->desc.properties = act8945a_charger_props;
charger->desc.num_properties = ARRAY_SIZE(act8945a_charger_props);
ret = act8945a_set_supply_type(charger, &charger->desc.type);
if (ret)
return -EINVAL;
psy_cfg.of_node = pdev->dev.of_node;
psy_cfg.drv_data = charger;
charger->psy = devm_power_supply_register(&pdev->dev,
&charger->desc,
&psy_cfg);
if (IS_ERR(charger->psy)) {
dev_err(&pdev->dev, "failed to register power supply\n");
return PTR_ERR(charger->psy);
}
platform_set_drvdata(pdev, charger);
INIT_WORK(&charger->work, act8945a_work);
ret = act8945a_enable_interrupt(charger);
if (ret)
return -EIO;
charger->init_done = true;
return 0;
}
static int act8945a_charger_remove(struct platform_device *pdev)
{
struct act8945a_charger *charger = platform_get_drvdata(pdev);
charger->init_done = false;
cancel_work_sync(&charger->work);
return 0;
}
static struct platform_driver act8945a_charger_driver = {
.driver = {
.name = "act8945a-charger",
},
.probe = act8945a_charger_probe,
.remove = act8945a_charger_remove,
};
module_platform_driver(act8945a_charger_driver);
MODULE_DESCRIPTION("Active-semi ACT8945A ActivePath charger driver");
MODULE_AUTHOR("Wenyou Yang <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/act8945a_charger.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* max8903_charger.c - Maxim 8903 USB/Adapter Charger Driver
*
* Copyright (C) 2011 Samsung Electronics
* MyungJoo Ham <[email protected]>
*/
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/power_supply.h>
#include <linux/platform_device.h>
struct max8903_data {
struct device *dev;
struct power_supply *psy;
struct power_supply_desc psy_desc;
/*
* GPIOs
* chg, flt, dcm and usus are optional.
* dok or uok must be present.
* If dok is present, cen must be present.
*/
struct gpio_desc *cen; /* Charger Enable input */
struct gpio_desc *dok; /* DC (Adapter) Power OK output */
struct gpio_desc *uok; /* USB Power OK output */
struct gpio_desc *chg; /* Charger status output */
struct gpio_desc *flt; /* Fault output */
struct gpio_desc *dcm; /* Current-Limit Mode input (1: DC, 2: USB) */
struct gpio_desc *usus; /* USB Suspend Input (1: suspended) */
bool fault;
bool usb_in;
bool ta_in;
};
static enum power_supply_property max8903_charger_props[] = {
POWER_SUPPLY_PROP_STATUS, /* Charger status output */
POWER_SUPPLY_PROP_ONLINE, /* External power source */
POWER_SUPPLY_PROP_HEALTH, /* Fault or OK */
};
static int max8903_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct max8903_data *data = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
if (data->chg) {
if (gpiod_get_value(data->chg))
/* CHG asserted */
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else if (data->usb_in || data->ta_in)
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
else
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
}
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = 0;
if (data->usb_in || data->ta_in)
val->intval = 1;
break;
case POWER_SUPPLY_PROP_HEALTH:
val->intval = POWER_SUPPLY_HEALTH_GOOD;
if (data->fault)
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
break;
default:
return -EINVAL;
}
return 0;
}
static irqreturn_t max8903_dcin(int irq, void *_data)
{
struct max8903_data *data = _data;
bool ta_in;
enum power_supply_type old_type;
/*
* This means the line is asserted.
*
* The signal is active low, but the inversion is handled in the GPIO
* library as the line should be flagged GPIO_ACTIVE_LOW in the device
* tree.
*/
ta_in = gpiod_get_value(data->dok);
if (ta_in == data->ta_in)
return IRQ_HANDLED;
data->ta_in = ta_in;
/* Set Current-Limit-Mode 1:DC 0:USB */
if (data->dcm)
gpiod_set_value(data->dcm, ta_in);
/* Charger Enable / Disable */
if (data->cen) {
int val;
if (ta_in)
/* Certainly enable if DOK is asserted */
val = 1;
else if (data->usb_in)
/* Enable if the USB charger is enabled */
val = 1;
else
/* Else default-disable */
val = 0;
gpiod_set_value(data->cen, val);
}
dev_dbg(data->dev, "TA(DC-IN) Charger %s.\n", ta_in ?
"Connected" : "Disconnected");
old_type = data->psy_desc.type;
if (data->ta_in)
data->psy_desc.type = POWER_SUPPLY_TYPE_MAINS;
else if (data->usb_in)
data->psy_desc.type = POWER_SUPPLY_TYPE_USB;
else
data->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY;
if (old_type != data->psy_desc.type)
power_supply_changed(data->psy);
return IRQ_HANDLED;
}
static irqreturn_t max8903_usbin(int irq, void *_data)
{
struct max8903_data *data = _data;
bool usb_in;
enum power_supply_type old_type;
/*
* This means the line is asserted.
*
* The signal is active low, but the inversion is handled in the GPIO
* library as the line should be flagged GPIO_ACTIVE_LOW in the device
* tree.
*/
usb_in = gpiod_get_value(data->uok);
if (usb_in == data->usb_in)
return IRQ_HANDLED;
data->usb_in = usb_in;
/* Do not touch Current-Limit-Mode */
/* Charger Enable / Disable */
if (data->cen) {
int val;
if (usb_in)
/* Certainly enable if UOK is asserted */
val = 1;
else if (data->ta_in)
/* Enable if the DC charger is enabled */
val = 1;
else
/* Else default-disable */
val = 0;
gpiod_set_value(data->cen, val);
}
dev_dbg(data->dev, "USB Charger %s.\n", usb_in ?
"Connected" : "Disconnected");
old_type = data->psy_desc.type;
if (data->ta_in)
data->psy_desc.type = POWER_SUPPLY_TYPE_MAINS;
else if (data->usb_in)
data->psy_desc.type = POWER_SUPPLY_TYPE_USB;
else
data->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY;
if (old_type != data->psy_desc.type)
power_supply_changed(data->psy);
return IRQ_HANDLED;
}
static irqreturn_t max8903_fault(int irq, void *_data)
{
struct max8903_data *data = _data;
bool fault;
/*
* This means the line is asserted.
*
* The signal is active low, but the inversion is handled in the GPIO
* library as the line should be flagged GPIO_ACTIVE_LOW in the device
* tree.
*/
fault = gpiod_get_value(data->flt);
if (fault == data->fault)
return IRQ_HANDLED;
data->fault = fault;
if (fault)
dev_err(data->dev, "Charger suffers a fault and stops.\n");
else
dev_err(data->dev, "Charger recovered from a fault.\n");
return IRQ_HANDLED;
}
static int max8903_setup_gpios(struct platform_device *pdev)
{
struct max8903_data *data = platform_get_drvdata(pdev);
struct device *dev = &pdev->dev;
bool ta_in = false;
bool usb_in = false;
enum gpiod_flags flags;
data->dok = devm_gpiod_get_optional(dev, "dok", GPIOD_IN);
if (IS_ERR(data->dok))
return dev_err_probe(dev, PTR_ERR(data->dok),
"failed to get DOK GPIO");
if (data->dok) {
gpiod_set_consumer_name(data->dok, data->psy_desc.name);
/*
* The DC OK is pulled up to 1 and goes low when a charger
* is plugged in (active low) but in the device tree the
* line is marked as GPIO_ACTIVE_LOW so we get a 1 (asserted)
* here if the DC charger is plugged in.
*/
ta_in = gpiod_get_value(data->dok);
}
data->uok = devm_gpiod_get_optional(dev, "uok", GPIOD_IN);
if (IS_ERR(data->uok))
return dev_err_probe(dev, PTR_ERR(data->uok),
"failed to get UOK GPIO");
if (data->uok) {
gpiod_set_consumer_name(data->uok, data->psy_desc.name);
/*
* The USB OK is pulled up to 1 and goes low when a USB charger
* is plugged in (active low) but in the device tree the
* line is marked as GPIO_ACTIVE_LOW so we get a 1 (asserted)
* here if the USB charger is plugged in.
*/
usb_in = gpiod_get_value(data->uok);
}
/* Either DC OK or USB OK must be provided */
if (!data->dok && !data->uok) {
dev_err(dev, "no valid power source\n");
return -EINVAL;
}
/*
* If either charger is already connected at this point,
* assert the CEN line and enable charging from the start.
*
* The line is active low but also marked with GPIO_ACTIVE_LOW
* in the device tree, so when we assert the line with
* GPIOD_OUT_HIGH the line will be driven low.
*/
flags = (ta_in || usb_in) ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
/*
* If DC OK is provided, Charger Enable CEN is compulsory
* so this is not optional here.
*/
data->cen = devm_gpiod_get(dev, "cen", flags);
if (IS_ERR(data->cen))
return dev_err_probe(dev, PTR_ERR(data->cen),
"failed to get CEN GPIO");
gpiod_set_consumer_name(data->cen, data->psy_desc.name);
/*
* If the DC charger is connected, then select it.
*
* The DCM line should be marked GPIO_ACTIVE_HIGH in the
* device tree. Driving it high will enable the DC charger
* input over the USB charger input.
*/
flags = ta_in ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
data->dcm = devm_gpiod_get_optional(dev, "dcm", flags);
if (IS_ERR(data->dcm))
return dev_err_probe(dev, PTR_ERR(data->dcm),
"failed to get DCM GPIO");
gpiod_set_consumer_name(data->dcm, data->psy_desc.name);
data->chg = devm_gpiod_get_optional(dev, "chg", GPIOD_IN);
if (IS_ERR(data->chg))
return dev_err_probe(dev, PTR_ERR(data->chg),
"failed to get CHG GPIO");
gpiod_set_consumer_name(data->chg, data->psy_desc.name);
data->flt = devm_gpiod_get_optional(dev, "flt", GPIOD_IN);
if (IS_ERR(data->flt))
return dev_err_probe(dev, PTR_ERR(data->flt),
"failed to get FLT GPIO");
gpiod_set_consumer_name(data->flt, data->psy_desc.name);
data->usus = devm_gpiod_get_optional(dev, "usus", GPIOD_IN);
if (IS_ERR(data->usus))
return dev_err_probe(dev, PTR_ERR(data->usus),
"failed to get USUS GPIO");
gpiod_set_consumer_name(data->usus, data->psy_desc.name);
data->fault = false;
data->ta_in = ta_in;
data->usb_in = usb_in;
return 0;
}
static int max8903_probe(struct platform_device *pdev)
{
struct max8903_data *data;
struct device *dev = &pdev->dev;
struct power_supply_config psy_cfg = {};
int ret = 0;
data = devm_kzalloc(dev, sizeof(struct max8903_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->dev = dev;
platform_set_drvdata(pdev, data);
ret = max8903_setup_gpios(pdev);
if (ret)
return ret;
data->psy_desc.name = "max8903_charger";
data->psy_desc.type = (data->ta_in) ? POWER_SUPPLY_TYPE_MAINS :
((data->usb_in) ? POWER_SUPPLY_TYPE_USB :
POWER_SUPPLY_TYPE_BATTERY);
data->psy_desc.get_property = max8903_get_property;
data->psy_desc.properties = max8903_charger_props;
data->psy_desc.num_properties = ARRAY_SIZE(max8903_charger_props);
psy_cfg.of_node = dev->of_node;
psy_cfg.drv_data = data;
data->psy = devm_power_supply_register(dev, &data->psy_desc, &psy_cfg);
if (IS_ERR(data->psy)) {
dev_err(dev, "failed: power supply register.\n");
return PTR_ERR(data->psy);
}
if (data->dok) {
ret = devm_request_threaded_irq(dev, gpiod_to_irq(data->dok),
NULL, max8903_dcin,
IRQF_TRIGGER_FALLING |
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
"MAX8903 DC IN", data);
if (ret) {
dev_err(dev, "Cannot request irq %d for DC (%d)\n",
gpiod_to_irq(data->dok), ret);
return ret;
}
}
if (data->uok) {
ret = devm_request_threaded_irq(dev, gpiod_to_irq(data->uok),
NULL, max8903_usbin,
IRQF_TRIGGER_FALLING |
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
"MAX8903 USB IN", data);
if (ret) {
dev_err(dev, "Cannot request irq %d for USB (%d)\n",
gpiod_to_irq(data->uok), ret);
return ret;
}
}
if (data->flt) {
ret = devm_request_threaded_irq(dev, gpiod_to_irq(data->flt),
NULL, max8903_fault,
IRQF_TRIGGER_FALLING |
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
"MAX8903 Fault", data);
if (ret) {
dev_err(dev, "Cannot request irq %d for Fault (%d)\n",
gpiod_to_irq(data->flt), ret);
return ret;
}
}
return 0;
}
static const struct of_device_id max8903_match_ids[] = {
{ .compatible = "maxim,max8903", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, max8903_match_ids);
static struct platform_driver max8903_driver = {
.probe = max8903_probe,
.driver = {
.name = "max8903-charger",
.of_match_table = max8903_match_ids
},
};
module_platform_driver(max8903_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("MAX8903 Charger Driver");
MODULE_AUTHOR("MyungJoo Ham <[email protected]>");
MODULE_ALIAS("platform:max8903-charger");
| linux-master | drivers/power/supply/max8903_charger.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Dumb driver for LiIon batteries using TWL4030 madc.
*
* Copyright 2013 Golden Delicious Computers
* Lukas Märdian <[email protected]>
*
* Based on dumb driver for gta01 battery
* Copyright 2009 Openmoko, Inc
* Balaji Rao <[email protected]>
*/
#include <linux/module.h>
#include <linux/param.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
#include <linux/sort.h>
#include <linux/power/twl4030_madc_battery.h>
#include <linux/iio/consumer.h>
struct twl4030_madc_battery {
struct power_supply *psy;
struct twl4030_madc_bat_platform_data *pdata;
struct iio_channel *channel_temp;
struct iio_channel *channel_ichg;
struct iio_channel *channel_vbat;
};
static enum power_supply_property twl4030_madc_bat_props[] = {
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
};
static int madc_read(struct iio_channel *channel)
{
int val, err;
err = iio_read_channel_processed(channel, &val);
if (err < 0)
return err;
return val;
}
static int twl4030_madc_bat_get_charging_status(struct twl4030_madc_battery *bt)
{
return (madc_read(bt->channel_ichg) > 0) ? 1 : 0;
}
static int twl4030_madc_bat_get_voltage(struct twl4030_madc_battery *bt)
{
return madc_read(bt->channel_vbat);
}
static int twl4030_madc_bat_get_current(struct twl4030_madc_battery *bt)
{
return madc_read(bt->channel_ichg) * 1000;
}
static int twl4030_madc_bat_get_temp(struct twl4030_madc_battery *bt)
{
return madc_read(bt->channel_temp) * 10;
}
static int twl4030_madc_bat_voltscale(struct twl4030_madc_battery *bat,
int volt)
{
struct twl4030_madc_bat_calibration *calibration;
int i, res = 0;
/* choose charging curve */
if (twl4030_madc_bat_get_charging_status(bat))
calibration = bat->pdata->charging;
else
calibration = bat->pdata->discharging;
if (volt > calibration[0].voltage) {
res = calibration[0].level;
} else {
for (i = 0; calibration[i+1].voltage >= 0; i++) {
if (volt <= calibration[i].voltage &&
volt >= calibration[i+1].voltage) {
/* interval found - interpolate within range */
res = calibration[i].level -
((calibration[i].voltage - volt) *
(calibration[i].level -
calibration[i+1].level)) /
(calibration[i].voltage -
calibration[i+1].voltage);
break;
}
}
}
return res;
}
static int twl4030_madc_bat_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct twl4030_madc_battery *bat = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
if (twl4030_madc_bat_voltscale(bat,
twl4030_madc_bat_get_voltage(bat)) > 95)
val->intval = POWER_SUPPLY_STATUS_FULL;
else {
if (twl4030_madc_bat_get_charging_status(bat))
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
}
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = twl4030_madc_bat_get_voltage(bat) * 1000;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
val->intval = twl4030_madc_bat_get_current(bat);
break;
case POWER_SUPPLY_PROP_PRESENT:
/* assume battery is always present */
val->intval = 1;
break;
case POWER_SUPPLY_PROP_CHARGE_NOW: {
int percent = twl4030_madc_bat_voltscale(bat,
twl4030_madc_bat_get_voltage(bat));
val->intval = (percent * bat->pdata->capacity) / 100;
break;
}
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = twl4030_madc_bat_voltscale(bat,
twl4030_madc_bat_get_voltage(bat));
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
val->intval = bat->pdata->capacity;
break;
case POWER_SUPPLY_PROP_TEMP:
val->intval = twl4030_madc_bat_get_temp(bat);
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: {
int percent = twl4030_madc_bat_voltscale(bat,
twl4030_madc_bat_get_voltage(bat));
/* in mAh */
int chg = (percent * (bat->pdata->capacity/1000))/100;
/* assume discharge with 400 mA (ca. 1.5W) */
val->intval = (3600l * chg) / 400;
break;
}
default:
return -EINVAL;
}
return 0;
}
static const struct power_supply_desc twl4030_madc_bat_desc = {
.name = "twl4030_battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = twl4030_madc_bat_props,
.num_properties = ARRAY_SIZE(twl4030_madc_bat_props),
.get_property = twl4030_madc_bat_get_property,
.external_power_changed = power_supply_changed,
};
static int twl4030_cmp(const void *a, const void *b)
{
return ((struct twl4030_madc_bat_calibration *)b)->voltage -
((struct twl4030_madc_bat_calibration *)a)->voltage;
}
static int twl4030_madc_battery_probe(struct platform_device *pdev)
{
struct twl4030_madc_battery *twl4030_madc_bat;
struct twl4030_madc_bat_platform_data *pdata = pdev->dev.platform_data;
struct power_supply_config psy_cfg = {};
int ret = 0;
twl4030_madc_bat = devm_kzalloc(&pdev->dev, sizeof(*twl4030_madc_bat),
GFP_KERNEL);
if (!twl4030_madc_bat)
return -ENOMEM;
twl4030_madc_bat->channel_temp = iio_channel_get(&pdev->dev, "temp");
if (IS_ERR(twl4030_madc_bat->channel_temp)) {
ret = PTR_ERR(twl4030_madc_bat->channel_temp);
goto err;
}
twl4030_madc_bat->channel_ichg = iio_channel_get(&pdev->dev, "ichg");
if (IS_ERR(twl4030_madc_bat->channel_ichg)) {
ret = PTR_ERR(twl4030_madc_bat->channel_ichg);
goto err_temp;
}
twl4030_madc_bat->channel_vbat = iio_channel_get(&pdev->dev, "vbat");
if (IS_ERR(twl4030_madc_bat->channel_vbat)) {
ret = PTR_ERR(twl4030_madc_bat->channel_vbat);
goto err_ichg;
}
/* sort charging and discharging calibration data */
sort(pdata->charging, pdata->charging_size,
sizeof(struct twl4030_madc_bat_calibration),
twl4030_cmp, NULL);
sort(pdata->discharging, pdata->discharging_size,
sizeof(struct twl4030_madc_bat_calibration),
twl4030_cmp, NULL);
twl4030_madc_bat->pdata = pdata;
platform_set_drvdata(pdev, twl4030_madc_bat);
psy_cfg.drv_data = twl4030_madc_bat;
twl4030_madc_bat->psy = power_supply_register(&pdev->dev,
&twl4030_madc_bat_desc,
&psy_cfg);
if (IS_ERR(twl4030_madc_bat->psy)) {
ret = PTR_ERR(twl4030_madc_bat->psy);
goto err_vbat;
}
return 0;
err_vbat:
iio_channel_release(twl4030_madc_bat->channel_vbat);
err_ichg:
iio_channel_release(twl4030_madc_bat->channel_ichg);
err_temp:
iio_channel_release(twl4030_madc_bat->channel_temp);
err:
return ret;
}
static int twl4030_madc_battery_remove(struct platform_device *pdev)
{
struct twl4030_madc_battery *bat = platform_get_drvdata(pdev);
power_supply_unregister(bat->psy);
iio_channel_release(bat->channel_vbat);
iio_channel_release(bat->channel_ichg);
iio_channel_release(bat->channel_temp);
return 0;
}
static struct platform_driver twl4030_madc_battery_driver = {
.driver = {
.name = "twl4030_madc_battery",
},
.probe = twl4030_madc_battery_probe,
.remove = twl4030_madc_battery_remove,
};
module_platform_driver(twl4030_madc_battery_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Lukas Märdian <[email protected]>");
MODULE_DESCRIPTION("twl4030_madc battery driver");
MODULE_ALIAS("platform:twl4030_madc_battery");
| linux-master | drivers/power/supply/twl4030_madc_battery.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* TI BQ25890 charger driver
*
* Copyright (C) 2015 Intel Corporation
*/
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/power_supply.h>
#include <linux/power/bq25890_charger.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/types.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/usb/phy.h>
#include <linux/acpi.h>
#include <linux/of.h>
#define BQ25890_MANUFACTURER "Texas Instruments"
#define BQ25890_IRQ_PIN "bq25890_irq"
#define BQ25890_ID 3
#define BQ25895_ID 7
#define BQ25896_ID 0
#define PUMP_EXPRESS_START_DELAY (5 * HZ)
#define PUMP_EXPRESS_MAX_TRIES 6
#define PUMP_EXPRESS_VBUS_MARGIN_uV 1000000
enum bq25890_chip_version {
BQ25890,
BQ25892,
BQ25895,
BQ25896,
};
static const char *const bq25890_chip_name[] = {
"BQ25890",
"BQ25892",
"BQ25895",
"BQ25896",
};
enum bq25890_fields {
F_EN_HIZ, F_EN_ILIM, F_IINLIM, /* Reg00 */
F_BHOT, F_BCOLD, F_VINDPM_OFS, /* Reg01 */
F_CONV_START, F_CONV_RATE, F_BOOSTF, F_ICO_EN,
F_HVDCP_EN, F_MAXC_EN, F_FORCE_DPM, F_AUTO_DPDM_EN, /* Reg02 */
F_BAT_LOAD_EN, F_WD_RST, F_OTG_CFG, F_CHG_CFG, F_SYSVMIN,
F_MIN_VBAT_SEL, /* Reg03 */
F_PUMPX_EN, F_ICHG, /* Reg04 */
F_IPRECHG, F_ITERM, /* Reg05 */
F_VREG, F_BATLOWV, F_VRECHG, /* Reg06 */
F_TERM_EN, F_STAT_DIS, F_WD, F_TMR_EN, F_CHG_TMR,
F_JEITA_ISET, /* Reg07 */
F_BATCMP, F_VCLAMP, F_TREG, /* Reg08 */
F_FORCE_ICO, F_TMR2X_EN, F_BATFET_DIS, F_JEITA_VSET,
F_BATFET_DLY, F_BATFET_RST_EN, F_PUMPX_UP, F_PUMPX_DN, /* Reg09 */
F_BOOSTV, F_PFM_OTG_DIS, F_BOOSTI, /* Reg0A */
F_VBUS_STAT, F_CHG_STAT, F_PG_STAT, F_SDP_STAT, F_0B_RSVD,
F_VSYS_STAT, /* Reg0B */
F_WD_FAULT, F_BOOST_FAULT, F_CHG_FAULT, F_BAT_FAULT,
F_NTC_FAULT, /* Reg0C */
F_FORCE_VINDPM, F_VINDPM, /* Reg0D */
F_THERM_STAT, F_BATV, /* Reg0E */
F_SYSV, /* Reg0F */
F_TSPCT, /* Reg10 */
F_VBUS_GD, F_VBUSV, /* Reg11 */
F_ICHGR, /* Reg12 */
F_VDPM_STAT, F_IDPM_STAT, F_IDPM_LIM, /* Reg13 */
F_REG_RST, F_ICO_OPTIMIZED, F_PN, F_TS_PROFILE, F_DEV_REV, /* Reg14 */
F_MAX_FIELDS
};
/* initial field values, converted to register values */
struct bq25890_init_data {
u8 ichg; /* charge current */
u8 vreg; /* regulation voltage */
u8 iterm; /* termination current */
u8 iprechg; /* precharge current */
u8 sysvmin; /* minimum system voltage limit */
u8 boostv; /* boost regulation voltage */
u8 boosti; /* boost current limit */
u8 boostf; /* boost frequency */
u8 ilim_en; /* enable ILIM pin */
u8 treg; /* thermal regulation threshold */
u8 rbatcomp; /* IBAT sense resistor value */
u8 vclamp; /* IBAT compensation voltage limit */
};
struct bq25890_state {
u8 online;
u8 hiz;
u8 chrg_status;
u8 chrg_fault;
u8 vsys_status;
u8 boost_fault;
u8 bat_fault;
u8 ntc_fault;
};
struct bq25890_device {
struct i2c_client *client;
struct device *dev;
struct power_supply *charger;
struct power_supply *secondary_chrg;
struct power_supply_desc desc;
char name[28]; /* "bq25890-charger-%d" */
int id;
struct usb_phy *usb_phy;
struct notifier_block usb_nb;
struct work_struct usb_work;
struct delayed_work pump_express_work;
unsigned long usb_event;
struct regmap *rmap;
struct regmap_field *rmap_fields[F_MAX_FIELDS];
bool skip_reset;
bool read_back_init_data;
bool force_hiz;
u32 pump_express_vbus_max;
u32 iinlim_percentage;
enum bq25890_chip_version chip_version;
struct bq25890_init_data init_data;
struct bq25890_state state;
struct mutex lock; /* protect state data */
};
static DEFINE_IDR(bq25890_id);
static DEFINE_MUTEX(bq25890_id_mutex);
static const struct regmap_range bq25890_readonly_reg_ranges[] = {
regmap_reg_range(0x0b, 0x0c),
regmap_reg_range(0x0e, 0x13),
};
static const struct regmap_access_table bq25890_writeable_regs = {
.no_ranges = bq25890_readonly_reg_ranges,
.n_no_ranges = ARRAY_SIZE(bq25890_readonly_reg_ranges),
};
static const struct regmap_range bq25890_volatile_reg_ranges[] = {
regmap_reg_range(0x00, 0x00),
regmap_reg_range(0x02, 0x02),
regmap_reg_range(0x09, 0x09),
regmap_reg_range(0x0b, 0x14),
};
static const struct regmap_access_table bq25890_volatile_regs = {
.yes_ranges = bq25890_volatile_reg_ranges,
.n_yes_ranges = ARRAY_SIZE(bq25890_volatile_reg_ranges),
};
static const struct regmap_config bq25890_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0x14,
.cache_type = REGCACHE_RBTREE,
.wr_table = &bq25890_writeable_regs,
.volatile_table = &bq25890_volatile_regs,
};
static const struct reg_field bq25890_reg_fields[] = {
/* REG00 */
[F_EN_HIZ] = REG_FIELD(0x00, 7, 7),
[F_EN_ILIM] = REG_FIELD(0x00, 6, 6),
[F_IINLIM] = REG_FIELD(0x00, 0, 5),
/* REG01 */
[F_BHOT] = REG_FIELD(0x01, 6, 7),
[F_BCOLD] = REG_FIELD(0x01, 5, 5),
[F_VINDPM_OFS] = REG_FIELD(0x01, 0, 4),
/* REG02 */
[F_CONV_START] = REG_FIELD(0x02, 7, 7),
[F_CONV_RATE] = REG_FIELD(0x02, 6, 6),
[F_BOOSTF] = REG_FIELD(0x02, 5, 5),
[F_ICO_EN] = REG_FIELD(0x02, 4, 4),
[F_HVDCP_EN] = REG_FIELD(0x02, 3, 3), // reserved on BQ25896
[F_MAXC_EN] = REG_FIELD(0x02, 2, 2), // reserved on BQ25896
[F_FORCE_DPM] = REG_FIELD(0x02, 1, 1),
[F_AUTO_DPDM_EN] = REG_FIELD(0x02, 0, 0),
/* REG03 */
[F_BAT_LOAD_EN] = REG_FIELD(0x03, 7, 7),
[F_WD_RST] = REG_FIELD(0x03, 6, 6),
[F_OTG_CFG] = REG_FIELD(0x03, 5, 5),
[F_CHG_CFG] = REG_FIELD(0x03, 4, 4),
[F_SYSVMIN] = REG_FIELD(0x03, 1, 3),
[F_MIN_VBAT_SEL] = REG_FIELD(0x03, 0, 0), // BQ25896 only
/* REG04 */
[F_PUMPX_EN] = REG_FIELD(0x04, 7, 7),
[F_ICHG] = REG_FIELD(0x04, 0, 6),
/* REG05 */
[F_IPRECHG] = REG_FIELD(0x05, 4, 7),
[F_ITERM] = REG_FIELD(0x05, 0, 3),
/* REG06 */
[F_VREG] = REG_FIELD(0x06, 2, 7),
[F_BATLOWV] = REG_FIELD(0x06, 1, 1),
[F_VRECHG] = REG_FIELD(0x06, 0, 0),
/* REG07 */
[F_TERM_EN] = REG_FIELD(0x07, 7, 7),
[F_STAT_DIS] = REG_FIELD(0x07, 6, 6),
[F_WD] = REG_FIELD(0x07, 4, 5),
[F_TMR_EN] = REG_FIELD(0x07, 3, 3),
[F_CHG_TMR] = REG_FIELD(0x07, 1, 2),
[F_JEITA_ISET] = REG_FIELD(0x07, 0, 0), // reserved on BQ25895
/* REG08 */
[F_BATCMP] = REG_FIELD(0x08, 5, 7),
[F_VCLAMP] = REG_FIELD(0x08, 2, 4),
[F_TREG] = REG_FIELD(0x08, 0, 1),
/* REG09 */
[F_FORCE_ICO] = REG_FIELD(0x09, 7, 7),
[F_TMR2X_EN] = REG_FIELD(0x09, 6, 6),
[F_BATFET_DIS] = REG_FIELD(0x09, 5, 5),
[F_JEITA_VSET] = REG_FIELD(0x09, 4, 4), // reserved on BQ25895
[F_BATFET_DLY] = REG_FIELD(0x09, 3, 3),
[F_BATFET_RST_EN] = REG_FIELD(0x09, 2, 2),
[F_PUMPX_UP] = REG_FIELD(0x09, 1, 1),
[F_PUMPX_DN] = REG_FIELD(0x09, 0, 0),
/* REG0A */
[F_BOOSTV] = REG_FIELD(0x0A, 4, 7),
[F_BOOSTI] = REG_FIELD(0x0A, 0, 2), // reserved on BQ25895
[F_PFM_OTG_DIS] = REG_FIELD(0x0A, 3, 3), // BQ25896 only
/* REG0B */
[F_VBUS_STAT] = REG_FIELD(0x0B, 5, 7),
[F_CHG_STAT] = REG_FIELD(0x0B, 3, 4),
[F_PG_STAT] = REG_FIELD(0x0B, 2, 2),
[F_SDP_STAT] = REG_FIELD(0x0B, 1, 1), // reserved on BQ25896
[F_VSYS_STAT] = REG_FIELD(0x0B, 0, 0),
/* REG0C */
[F_WD_FAULT] = REG_FIELD(0x0C, 7, 7),
[F_BOOST_FAULT] = REG_FIELD(0x0C, 6, 6),
[F_CHG_FAULT] = REG_FIELD(0x0C, 4, 5),
[F_BAT_FAULT] = REG_FIELD(0x0C, 3, 3),
[F_NTC_FAULT] = REG_FIELD(0x0C, 0, 2),
/* REG0D */
[F_FORCE_VINDPM] = REG_FIELD(0x0D, 7, 7),
[F_VINDPM] = REG_FIELD(0x0D, 0, 6),
/* REG0E */
[F_THERM_STAT] = REG_FIELD(0x0E, 7, 7),
[F_BATV] = REG_FIELD(0x0E, 0, 6),
/* REG0F */
[F_SYSV] = REG_FIELD(0x0F, 0, 6),
/* REG10 */
[F_TSPCT] = REG_FIELD(0x10, 0, 6),
/* REG11 */
[F_VBUS_GD] = REG_FIELD(0x11, 7, 7),
[F_VBUSV] = REG_FIELD(0x11, 0, 6),
/* REG12 */
[F_ICHGR] = REG_FIELD(0x12, 0, 6),
/* REG13 */
[F_VDPM_STAT] = REG_FIELD(0x13, 7, 7),
[F_IDPM_STAT] = REG_FIELD(0x13, 6, 6),
[F_IDPM_LIM] = REG_FIELD(0x13, 0, 5),
/* REG14 */
[F_REG_RST] = REG_FIELD(0x14, 7, 7),
[F_ICO_OPTIMIZED] = REG_FIELD(0x14, 6, 6),
[F_PN] = REG_FIELD(0x14, 3, 5),
[F_TS_PROFILE] = REG_FIELD(0x14, 2, 2),
[F_DEV_REV] = REG_FIELD(0x14, 0, 1)
};
/*
* Most of the val -> idx conversions can be computed, given the minimum,
* maximum and the step between values. For the rest of conversions, we use
* lookup tables.
*/
enum bq25890_table_ids {
/* range tables */
TBL_ICHG,
TBL_ITERM,
TBL_IINLIM,
TBL_VREG,
TBL_BOOSTV,
TBL_SYSVMIN,
TBL_VBUSV,
TBL_VBATCOMP,
TBL_RBATCOMP,
/* lookup tables */
TBL_TREG,
TBL_BOOSTI,
TBL_TSPCT,
};
/* Thermal Regulation Threshold lookup table, in degrees Celsius */
static const u32 bq25890_treg_tbl[] = { 60, 80, 100, 120 };
#define BQ25890_TREG_TBL_SIZE ARRAY_SIZE(bq25890_treg_tbl)
/* Boost mode current limit lookup table, in uA */
static const u32 bq25890_boosti_tbl[] = {
500000, 700000, 1100000, 1300000, 1600000, 1800000, 2100000, 2400000
};
#define BQ25890_BOOSTI_TBL_SIZE ARRAY_SIZE(bq25890_boosti_tbl)
/* NTC 10K temperature lookup table in tenths of a degree */
static const u32 bq25890_tspct_tbl[] = {
850, 840, 830, 820, 810, 800, 790, 780,
770, 760, 750, 740, 730, 720, 710, 700,
690, 685, 680, 675, 670, 660, 650, 645,
640, 630, 620, 615, 610, 600, 590, 585,
580, 570, 565, 560, 550, 540, 535, 530,
520, 515, 510, 500, 495, 490, 480, 475,
470, 460, 455, 450, 440, 435, 430, 425,
420, 410, 405, 400, 390, 385, 380, 370,
365, 360, 355, 350, 340, 335, 330, 320,
310, 305, 300, 290, 285, 280, 275, 270,
260, 250, 245, 240, 230, 225, 220, 210,
205, 200, 190, 180, 175, 170, 160, 150,
145, 140, 130, 120, 115, 110, 100, 90,
80, 70, 60, 50, 40, 30, 20, 10,
0, -10, -20, -30, -40, -60, -70, -80,
-90, -10, -120, -140, -150, -170, -190, -210,
};
#define BQ25890_TSPCT_TBL_SIZE ARRAY_SIZE(bq25890_tspct_tbl)
struct bq25890_range {
u32 min;
u32 max;
u32 step;
};
struct bq25890_lookup {
const u32 *tbl;
u32 size;
};
static const union {
struct bq25890_range rt;
struct bq25890_lookup lt;
} bq25890_tables[] = {
/* range tables */
/* TODO: BQ25896 has max ICHG 3008 mA */
[TBL_ICHG] = { .rt = {0, 5056000, 64000} }, /* uA */
[TBL_ITERM] = { .rt = {64000, 1024000, 64000} }, /* uA */
[TBL_IINLIM] = { .rt = {100000, 3250000, 50000} }, /* uA */
[TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* uV */
[TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} }, /* uV */
[TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} }, /* uV */
[TBL_VBUSV] = { .rt = {2600000, 15300000, 100000} }, /* uV */
[TBL_VBATCOMP] = { .rt = {0, 224000, 32000} }, /* uV */
[TBL_RBATCOMP] = { .rt = {0, 140000, 20000} }, /* uOhm */
/* lookup tables */
[TBL_TREG] = { .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} },
[TBL_BOOSTI] = { .lt = {bq25890_boosti_tbl, BQ25890_BOOSTI_TBL_SIZE} },
[TBL_TSPCT] = { .lt = {bq25890_tspct_tbl, BQ25890_TSPCT_TBL_SIZE} }
};
static int bq25890_field_read(struct bq25890_device *bq,
enum bq25890_fields field_id)
{
int ret;
int val;
ret = regmap_field_read(bq->rmap_fields[field_id], &val);
if (ret < 0)
return ret;
return val;
}
static int bq25890_field_write(struct bq25890_device *bq,
enum bq25890_fields field_id, u8 val)
{
return regmap_field_write(bq->rmap_fields[field_id], val);
}
static u8 bq25890_find_idx(u32 value, enum bq25890_table_ids id)
{
u8 idx;
if (id >= TBL_TREG) {
const u32 *tbl = bq25890_tables[id].lt.tbl;
u32 tbl_size = bq25890_tables[id].lt.size;
for (idx = 1; idx < tbl_size && tbl[idx] <= value; idx++)
;
} else {
const struct bq25890_range *rtbl = &bq25890_tables[id].rt;
u8 rtbl_size;
rtbl_size = (rtbl->max - rtbl->min) / rtbl->step + 1;
for (idx = 1;
idx < rtbl_size && (idx * rtbl->step + rtbl->min <= value);
idx++)
;
}
return idx - 1;
}
static u32 bq25890_find_val(u8 idx, enum bq25890_table_ids id)
{
const struct bq25890_range *rtbl;
/* lookup table? */
if (id >= TBL_TREG)
return bq25890_tables[id].lt.tbl[idx];
/* range table */
rtbl = &bq25890_tables[id].rt;
return (rtbl->min + idx * rtbl->step);
}
enum bq25890_status {
STATUS_NOT_CHARGING,
STATUS_PRE_CHARGING,
STATUS_FAST_CHARGING,
STATUS_TERMINATION_DONE,
};
enum bq25890_chrg_fault {
CHRG_FAULT_NORMAL,
CHRG_FAULT_INPUT,
CHRG_FAULT_THERMAL_SHUTDOWN,
CHRG_FAULT_TIMER_EXPIRED,
};
enum bq25890_ntc_fault {
NTC_FAULT_NORMAL = 0,
NTC_FAULT_WARM = 2,
NTC_FAULT_COOL = 3,
NTC_FAULT_COLD = 5,
NTC_FAULT_HOT = 6,
};
static bool bq25890_is_adc_property(enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
case POWER_SUPPLY_PROP_CURRENT_NOW:
case POWER_SUPPLY_PROP_TEMP:
return true;
default:
return false;
}
}
static irqreturn_t __bq25890_handle_irq(struct bq25890_device *bq);
static int bq25890_get_vbus_voltage(struct bq25890_device *bq)
{
int ret;
ret = bq25890_field_read(bq, F_VBUSV);
if (ret < 0)
return ret;
return bq25890_find_val(ret, TBL_VBUSV);
}
static void bq25890_update_state(struct bq25890_device *bq,
enum power_supply_property psp,
struct bq25890_state *state)
{
bool do_adc_conv;
int ret;
mutex_lock(&bq->lock);
/* update state in case we lost an interrupt */
__bq25890_handle_irq(bq);
*state = bq->state;
do_adc_conv = (!state->online || state->hiz) && bq25890_is_adc_property(psp);
if (do_adc_conv)
bq25890_field_write(bq, F_CONV_START, 1);
mutex_unlock(&bq->lock);
if (do_adc_conv)
regmap_field_read_poll_timeout(bq->rmap_fields[F_CONV_START],
ret, !ret, 25000, 1000000);
}
static int bq25890_power_supply_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct bq25890_device *bq = power_supply_get_drvdata(psy);
struct bq25890_state state;
int ret;
bq25890_update_state(bq, psp, &state);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
if (!state.online || state.hiz)
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
else if (state.chrg_status == STATUS_NOT_CHARGING)
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
else if (state.chrg_status == STATUS_PRE_CHARGING ||
state.chrg_status == STATUS_FAST_CHARGING)
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else if (state.chrg_status == STATUS_TERMINATION_DONE)
val->intval = POWER_SUPPLY_STATUS_FULL;
else
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
if (!state.online || state.hiz ||
state.chrg_status == STATUS_NOT_CHARGING ||
state.chrg_status == STATUS_TERMINATION_DONE)
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
else if (state.chrg_status == STATUS_PRE_CHARGING)
val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
else if (state.chrg_status == STATUS_FAST_CHARGING)
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
else /* unreachable */
val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = BQ25890_MANUFACTURER;
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = bq25890_chip_name[bq->chip_version];
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = state.online && !state.hiz;
break;
case POWER_SUPPLY_PROP_HEALTH:
if (!state.chrg_fault && !state.bat_fault && !state.boost_fault)
val->intval = POWER_SUPPLY_HEALTH_GOOD;
else if (state.bat_fault)
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
else if (state.chrg_fault == CHRG_FAULT_TIMER_EXPIRED)
val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
else if (state.chrg_fault == CHRG_FAULT_THERMAL_SHUTDOWN)
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
else
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
break;
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
val->intval = bq25890_find_val(bq->init_data.iprechg, TBL_ITERM);
break;
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM);
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = bq25890_field_read(bq, F_IINLIM);
if (ret < 0)
return ret;
val->intval = bq25890_find_val(ret, TBL_IINLIM);
break;
case POWER_SUPPLY_PROP_CURRENT_NOW: /* I_BAT now */
/*
* This is ADC-sampled immediate charge current supplied
* from charger to battery. The property name is confusing,
* for clarification refer to:
* Documentation/ABI/testing/sysfs-class-power
* /sys/class/power_supply/<supply_name>/current_now
*/
ret = bq25890_field_read(bq, F_ICHGR); /* read measured value */
if (ret < 0)
return ret;
/* converted_val = ADC_val * 50mA (table 10.3.19) */
val->intval = ret * -50000;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: /* I_BAT user limit */
/*
* This is user-configured constant charge current supplied
* from charger to battery in first phase of charging, when
* battery voltage is below constant charge voltage.
*
* This value reflects the current hardware setting.
*
* The POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX is the
* maximum value of this property.
*/
ret = bq25890_field_read(bq, F_ICHG);
if (ret < 0)
return ret;
val->intval = bq25890_find_val(ret, TBL_ICHG);
/* When temperature is too low, charge current is decreased */
if (bq->state.ntc_fault == NTC_FAULT_COOL) {
ret = bq25890_field_read(bq, F_JEITA_ISET);
if (ret < 0)
return ret;
if (ret)
val->intval /= 5;
else
val->intval /= 2;
}
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: /* I_BAT max */
/*
* This is maximum allowed constant charge current supplied
* from charger to battery in first phase of charging, when
* battery voltage is below constant charge voltage.
*
* This value is constant for each battery and set from DT.
*/
val->intval = bq25890_find_val(bq->init_data.ichg, TBL_ICHG);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW: /* V_BAT now */
/*
* This is ADC-sampled immediate charge voltage supplied
* from charger to battery. The property name is confusing,
* for clarification refer to:
* Documentation/ABI/testing/sysfs-class-power
* /sys/class/power_supply/<supply_name>/voltage_now
*/
ret = bq25890_field_read(bq, F_BATV); /* read measured value */
if (ret < 0)
return ret;
/* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
val->intval = 2304000 + ret * 20000;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: /* V_BAT user limit */
/*
* This is user-configured constant charge voltage supplied
* from charger to battery in second phase of charging, when
* battery voltage reached constant charge voltage.
*
* This value reflects the current hardware setting.
*
* The POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX is the
* maximum value of this property.
*/
ret = bq25890_field_read(bq, F_VREG);
if (ret < 0)
return ret;
val->intval = bq25890_find_val(ret, TBL_VREG);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: /* V_BAT max */
/*
* This is maximum allowed constant charge voltage supplied
* from charger to battery in second phase of charging, when
* battery voltage reached constant charge voltage.
*
* This value is constant for each battery and set from DT.
*/
val->intval = bq25890_find_val(bq->init_data.vreg, TBL_VREG);
break;
case POWER_SUPPLY_PROP_TEMP:
ret = bq25890_field_read(bq, F_TSPCT);
if (ret < 0)
return ret;
/* convert TS percentage into rough temperature */
val->intval = bq25890_find_val(ret, TBL_TSPCT);
break;
default:
return -EINVAL;
}
return 0;
}
static int bq25890_power_supply_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct bq25890_device *bq = power_supply_get_drvdata(psy);
struct bq25890_state state;
int maxval, ret;
u8 lval;
switch (psp) {
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
maxval = bq25890_find_val(bq->init_data.ichg, TBL_ICHG);
lval = bq25890_find_idx(min(val->intval, maxval), TBL_ICHG);
return bq25890_field_write(bq, F_ICHG, lval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
maxval = bq25890_find_val(bq->init_data.vreg, TBL_VREG);
lval = bq25890_find_idx(min(val->intval, maxval), TBL_VREG);
return bq25890_field_write(bq, F_VREG, lval);
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
lval = bq25890_find_idx(val->intval, TBL_IINLIM);
return bq25890_field_write(bq, F_IINLIM, lval);
case POWER_SUPPLY_PROP_ONLINE:
ret = bq25890_field_write(bq, F_EN_HIZ, !val->intval);
if (!ret)
bq->force_hiz = !val->intval;
bq25890_update_state(bq, psp, &state);
return ret;
default:
return -EINVAL;
}
}
static int bq25890_power_supply_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
case POWER_SUPPLY_PROP_ONLINE:
return true;
default:
return false;
}
}
/*
* If there are multiple chargers the maximum current the external power-supply
* can deliver needs to be divided over the chargers. This is done according
* to the bq->iinlim_percentage setting.
*/
static int bq25890_charger_get_scaled_iinlim_regval(struct bq25890_device *bq,
int iinlim_ua)
{
iinlim_ua = iinlim_ua * bq->iinlim_percentage / 100;
return bq25890_find_idx(iinlim_ua, TBL_IINLIM);
}
/* On the BQ25892 try to get charger-type info from our supplier */
static void bq25890_charger_external_power_changed(struct power_supply *psy)
{
struct bq25890_device *bq = power_supply_get_drvdata(psy);
union power_supply_propval val;
int input_current_limit, ret;
if (bq->chip_version != BQ25892)
return;
ret = power_supply_get_property_from_supplier(psy,
POWER_SUPPLY_PROP_USB_TYPE,
&val);
if (ret)
return;
switch (val.intval) {
case POWER_SUPPLY_USB_TYPE_DCP:
input_current_limit = bq25890_charger_get_scaled_iinlim_regval(bq, 2000000);
if (bq->pump_express_vbus_max) {
queue_delayed_work(system_power_efficient_wq,
&bq->pump_express_work,
PUMP_EXPRESS_START_DELAY);
}
break;
case POWER_SUPPLY_USB_TYPE_CDP:
case POWER_SUPPLY_USB_TYPE_ACA:
input_current_limit = bq25890_charger_get_scaled_iinlim_regval(bq, 1500000);
break;
case POWER_SUPPLY_USB_TYPE_SDP:
default:
input_current_limit = bq25890_charger_get_scaled_iinlim_regval(bq, 500000);
}
bq25890_field_write(bq, F_IINLIM, input_current_limit);
power_supply_changed(psy);
}
static int bq25890_get_chip_state(struct bq25890_device *bq,
struct bq25890_state *state)
{
int i, ret;
struct {
enum bq25890_fields id;
u8 *data;
} state_fields[] = {
{F_CHG_STAT, &state->chrg_status},
{F_PG_STAT, &state->online},
{F_EN_HIZ, &state->hiz},
{F_VSYS_STAT, &state->vsys_status},
{F_BOOST_FAULT, &state->boost_fault},
{F_BAT_FAULT, &state->bat_fault},
{F_CHG_FAULT, &state->chrg_fault},
{F_NTC_FAULT, &state->ntc_fault}
};
for (i = 0; i < ARRAY_SIZE(state_fields); i++) {
ret = bq25890_field_read(bq, state_fields[i].id);
if (ret < 0)
return ret;
*state_fields[i].data = ret;
}
dev_dbg(bq->dev, "S:CHG/PG/HIZ/VSYS=%d/%d/%d/%d, F:CHG/BOOST/BAT/NTC=%d/%d/%d/%d\n",
state->chrg_status, state->online,
state->hiz, state->vsys_status,
state->chrg_fault, state->boost_fault,
state->bat_fault, state->ntc_fault);
return 0;
}
static irqreturn_t __bq25890_handle_irq(struct bq25890_device *bq)
{
bool adc_conv_rate, new_adc_conv_rate;
struct bq25890_state new_state;
int ret;
ret = bq25890_get_chip_state(bq, &new_state);
if (ret < 0)
return IRQ_NONE;
if (!memcmp(&bq->state, &new_state, sizeof(new_state)))
return IRQ_NONE;
/*
* Restore HiZ bit in case it was set by user. The chip does not retain
* this bit on cable replug, hence the bit must be reset manually here.
*/
if (new_state.online && !bq->state.online && bq->force_hiz) {
ret = bq25890_field_write(bq, F_EN_HIZ, bq->force_hiz);
if (ret < 0)
goto error;
new_state.hiz = 1;
}
/* Should period ADC sampling be enabled? */
adc_conv_rate = bq->state.online && !bq->state.hiz;
new_adc_conv_rate = new_state.online && !new_state.hiz;
if (new_adc_conv_rate != adc_conv_rate) {
ret = bq25890_field_write(bq, F_CONV_RATE, new_adc_conv_rate);
if (ret < 0)
goto error;
}
bq->state = new_state;
power_supply_changed(bq->charger);
return IRQ_HANDLED;
error:
dev_err(bq->dev, "Error communicating with the chip: %pe\n",
ERR_PTR(ret));
return IRQ_HANDLED;
}
static irqreturn_t bq25890_irq_handler_thread(int irq, void *private)
{
struct bq25890_device *bq = private;
irqreturn_t ret;
mutex_lock(&bq->lock);
ret = __bq25890_handle_irq(bq);
mutex_unlock(&bq->lock);
return ret;
}
static int bq25890_chip_reset(struct bq25890_device *bq)
{
int ret;
int rst_check_counter = 10;
ret = bq25890_field_write(bq, F_REG_RST, 1);
if (ret < 0)
return ret;
do {
ret = bq25890_field_read(bq, F_REG_RST);
if (ret < 0)
return ret;
usleep_range(5, 10);
} while (ret == 1 && --rst_check_counter);
if (!rst_check_counter)
return -ETIMEDOUT;
return 0;
}
static int bq25890_rw_init_data(struct bq25890_device *bq)
{
bool write = !bq->read_back_init_data;
int ret;
int i;
const struct {
enum bq25890_fields id;
u8 *value;
} init_data[] = {
{F_ICHG, &bq->init_data.ichg},
{F_VREG, &bq->init_data.vreg},
{F_ITERM, &bq->init_data.iterm},
{F_IPRECHG, &bq->init_data.iprechg},
{F_SYSVMIN, &bq->init_data.sysvmin},
{F_BOOSTV, &bq->init_data.boostv},
{F_BOOSTI, &bq->init_data.boosti},
{F_BOOSTF, &bq->init_data.boostf},
{F_EN_ILIM, &bq->init_data.ilim_en},
{F_TREG, &bq->init_data.treg},
{F_BATCMP, &bq->init_data.rbatcomp},
{F_VCLAMP, &bq->init_data.vclamp},
};
for (i = 0; i < ARRAY_SIZE(init_data); i++) {
if (write) {
ret = bq25890_field_write(bq, init_data[i].id,
*init_data[i].value);
} else {
ret = bq25890_field_read(bq, init_data[i].id);
if (ret >= 0)
*init_data[i].value = ret;
}
if (ret < 0) {
dev_dbg(bq->dev, "Accessing init data failed %d\n", ret);
return ret;
}
}
return 0;
}
static int bq25890_hw_init(struct bq25890_device *bq)
{
int ret;
if (!bq->skip_reset) {
ret = bq25890_chip_reset(bq);
if (ret < 0) {
dev_dbg(bq->dev, "Reset failed %d\n", ret);
return ret;
}
} else {
/*
* Ensure charging is enabled, on some boards where the fw
* takes care of initalizition F_CHG_CFG is set to 0 before
* handing control over to the OS.
*/
ret = bq25890_field_write(bq, F_CHG_CFG, 1);
if (ret < 0) {
dev_dbg(bq->dev, "Enabling charging failed %d\n", ret);
return ret;
}
}
/* disable watchdog */
ret = bq25890_field_write(bq, F_WD, 0);
if (ret < 0) {
dev_dbg(bq->dev, "Disabling watchdog failed %d\n", ret);
return ret;
}
/* initialize currents/voltages and other parameters */
ret = bq25890_rw_init_data(bq);
if (ret)
return ret;
ret = bq25890_get_chip_state(bq, &bq->state);
if (ret < 0) {
dev_dbg(bq->dev, "Get state failed %d\n", ret);
return ret;
}
/* Configure ADC for continuous conversions when charging */
ret = bq25890_field_write(bq, F_CONV_RATE, bq->state.online && !bq->state.hiz);
if (ret < 0) {
dev_dbg(bq->dev, "Config ADC failed %d\n", ret);
return ret;
}
return 0;
}
static const enum power_supply_property bq25890_power_supply_props[] = {
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_TEMP,
};
static char *bq25890_charger_supplied_to[] = {
"main-battery",
};
static const struct power_supply_desc bq25890_power_supply_desc = {
.type = POWER_SUPPLY_TYPE_USB,
.properties = bq25890_power_supply_props,
.num_properties = ARRAY_SIZE(bq25890_power_supply_props),
.get_property = bq25890_power_supply_get_property,
.set_property = bq25890_power_supply_set_property,
.property_is_writeable = bq25890_power_supply_property_is_writeable,
.external_power_changed = bq25890_charger_external_power_changed,
};
static int bq25890_power_supply_init(struct bq25890_device *bq)
{
struct power_supply_config psy_cfg = { .drv_data = bq, };
/* Get ID for the device */
mutex_lock(&bq25890_id_mutex);
bq->id = idr_alloc(&bq25890_id, bq, 0, 0, GFP_KERNEL);
mutex_unlock(&bq25890_id_mutex);
if (bq->id < 0)
return bq->id;
snprintf(bq->name, sizeof(bq->name), "bq25890-charger-%d", bq->id);
bq->desc = bq25890_power_supply_desc;
bq->desc.name = bq->name;
psy_cfg.supplied_to = bq25890_charger_supplied_to;
psy_cfg.num_supplicants = ARRAY_SIZE(bq25890_charger_supplied_to);
bq->charger = devm_power_supply_register(bq->dev, &bq->desc, &psy_cfg);
return PTR_ERR_OR_ZERO(bq->charger);
}
static int bq25890_set_otg_cfg(struct bq25890_device *bq, u8 val)
{
int ret;
ret = bq25890_field_write(bq, F_OTG_CFG, val);
if (ret < 0)
dev_err(bq->dev, "Error switching to boost/charger mode: %d\n", ret);
return ret;
}
static void bq25890_pump_express_work(struct work_struct *data)
{
struct bq25890_device *bq =
container_of(data, struct bq25890_device, pump_express_work.work);
union power_supply_propval value;
int voltage, i, ret;
dev_dbg(bq->dev, "Start to request input voltage increasing\n");
/* If there is a second charger put in Hi-Z mode */
if (bq->secondary_chrg) {
value.intval = 0;
power_supply_set_property(bq->secondary_chrg, POWER_SUPPLY_PROP_ONLINE, &value);
}
/* Enable current pulse voltage control protocol */
ret = bq25890_field_write(bq, F_PUMPX_EN, 1);
if (ret < 0)
goto error_print;
for (i = 0; i < PUMP_EXPRESS_MAX_TRIES; i++) {
voltage = bq25890_get_vbus_voltage(bq);
if (voltage < 0)
goto error_print;
dev_dbg(bq->dev, "input voltage = %d uV\n", voltage);
if ((voltage + PUMP_EXPRESS_VBUS_MARGIN_uV) >
bq->pump_express_vbus_max)
break;
ret = bq25890_field_write(bq, F_PUMPX_UP, 1);
if (ret < 0)
goto error_print;
/* Note a single PUMPX up pulse-sequence takes 2.1s */
ret = regmap_field_read_poll_timeout(bq->rmap_fields[F_PUMPX_UP],
ret, !ret, 100000, 3000000);
if (ret < 0)
goto error_print;
/* Make sure ADC has sampled Vbus before checking again */
msleep(1000);
}
bq25890_field_write(bq, F_PUMPX_EN, 0);
if (bq->secondary_chrg) {
value.intval = 1;
power_supply_set_property(bq->secondary_chrg, POWER_SUPPLY_PROP_ONLINE, &value);
}
dev_info(bq->dev, "Hi-voltage charging requested, input voltage is %d mV\n",
voltage);
power_supply_changed(bq->charger);
return;
error_print:
bq25890_field_write(bq, F_PUMPX_EN, 0);
dev_err(bq->dev, "Failed to request hi-voltage charging\n");
}
static void bq25890_usb_work(struct work_struct *data)
{
int ret;
struct bq25890_device *bq =
container_of(data, struct bq25890_device, usb_work);
switch (bq->usb_event) {
case USB_EVENT_ID:
/* Enable boost mode */
bq25890_set_otg_cfg(bq, 1);
break;
case USB_EVENT_NONE:
/* Disable boost mode */
ret = bq25890_set_otg_cfg(bq, 0);
if (ret == 0)
power_supply_changed(bq->charger);
break;
}
}
static int bq25890_usb_notifier(struct notifier_block *nb, unsigned long val,
void *priv)
{
struct bq25890_device *bq =
container_of(nb, struct bq25890_device, usb_nb);
bq->usb_event = val;
queue_work(system_power_efficient_wq, &bq->usb_work);
return NOTIFY_OK;
}
#ifdef CONFIG_REGULATOR
static int bq25890_vbus_enable(struct regulator_dev *rdev)
{
struct bq25890_device *bq = rdev_get_drvdata(rdev);
union power_supply_propval val = {
.intval = 0,
};
/*
* When enabling 5V boost / Vbus output, we need to put the secondary
* charger in Hi-Z mode to avoid it trying to charge the secondary
* battery from the 5V boost output.
*/
if (bq->secondary_chrg)
power_supply_set_property(bq->secondary_chrg, POWER_SUPPLY_PROP_ONLINE, &val);
return bq25890_set_otg_cfg(bq, 1);
}
static int bq25890_vbus_disable(struct regulator_dev *rdev)
{
struct bq25890_device *bq = rdev_get_drvdata(rdev);
union power_supply_propval val = {
.intval = 1,
};
int ret;
ret = bq25890_set_otg_cfg(bq, 0);
if (ret)
return ret;
if (bq->secondary_chrg)
power_supply_set_property(bq->secondary_chrg, POWER_SUPPLY_PROP_ONLINE, &val);
return 0;
}
static int bq25890_vbus_is_enabled(struct regulator_dev *rdev)
{
struct bq25890_device *bq = rdev_get_drvdata(rdev);
return bq25890_field_read(bq, F_OTG_CFG);
}
static int bq25890_vbus_get_voltage(struct regulator_dev *rdev)
{
struct bq25890_device *bq = rdev_get_drvdata(rdev);
return bq25890_get_vbus_voltage(bq);
}
static int bq25890_vsys_get_voltage(struct regulator_dev *rdev)
{
struct bq25890_device *bq = rdev_get_drvdata(rdev);
int ret;
/* Should be some output voltage ? */
ret = bq25890_field_read(bq, F_SYSV); /* read measured value */
if (ret < 0)
return ret;
/* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
return 2304000 + ret * 20000;
}
static const struct regulator_ops bq25890_vbus_ops = {
.enable = bq25890_vbus_enable,
.disable = bq25890_vbus_disable,
.is_enabled = bq25890_vbus_is_enabled,
.get_voltage = bq25890_vbus_get_voltage,
};
static const struct regulator_desc bq25890_vbus_desc = {
.name = "usb_otg_vbus",
.of_match = "usb-otg-vbus",
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.ops = &bq25890_vbus_ops,
};
static const struct regulator_ops bq25890_vsys_ops = {
.get_voltage = bq25890_vsys_get_voltage,
};
static const struct regulator_desc bq25890_vsys_desc = {
.name = "vsys",
.of_match = "vsys",
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.ops = &bq25890_vsys_ops,
};
static int bq25890_register_regulator(struct bq25890_device *bq)
{
struct bq25890_platform_data *pdata = dev_get_platdata(bq->dev);
struct regulator_config cfg = {
.dev = bq->dev,
.driver_data = bq,
};
struct regulator_dev *reg;
if (pdata)
cfg.init_data = pdata->regulator_init_data;
reg = devm_regulator_register(bq->dev, &bq25890_vbus_desc, &cfg);
if (IS_ERR(reg)) {
return dev_err_probe(bq->dev, PTR_ERR(reg),
"registering vbus regulator");
}
/* pdata->regulator_init_data is for vbus only */
cfg.init_data = NULL;
reg = devm_regulator_register(bq->dev, &bq25890_vsys_desc, &cfg);
if (IS_ERR(reg)) {
return dev_err_probe(bq->dev, PTR_ERR(reg),
"registering vsys regulator");
}
return 0;
}
#else
static inline int
bq25890_register_regulator(struct bq25890_device *bq)
{
return 0;
}
#endif
static int bq25890_get_chip_version(struct bq25890_device *bq)
{
int id, rev;
id = bq25890_field_read(bq, F_PN);
if (id < 0) {
dev_err(bq->dev, "Cannot read chip ID: %d\n", id);
return id;
}
rev = bq25890_field_read(bq, F_DEV_REV);
if (rev < 0) {
dev_err(bq->dev, "Cannot read chip revision: %d\n", rev);
return rev;
}
switch (id) {
case BQ25890_ID:
bq->chip_version = BQ25890;
break;
/* BQ25892 and BQ25896 share same ID 0 */
case BQ25896_ID:
switch (rev) {
case 2:
bq->chip_version = BQ25896;
break;
case 1:
bq->chip_version = BQ25892;
break;
default:
dev_err(bq->dev,
"Unknown device revision %d, assume BQ25892\n",
rev);
bq->chip_version = BQ25892;
}
break;
case BQ25895_ID:
bq->chip_version = BQ25895;
break;
default:
dev_err(bq->dev, "Unknown chip ID %d\n", id);
return -ENODEV;
}
return 0;
}
static int bq25890_irq_probe(struct bq25890_device *bq)
{
struct gpio_desc *irq;
irq = devm_gpiod_get(bq->dev, BQ25890_IRQ_PIN, GPIOD_IN);
if (IS_ERR(irq))
return dev_err_probe(bq->dev, PTR_ERR(irq),
"Could not probe irq pin.\n");
return gpiod_to_irq(irq);
}
static int bq25890_fw_read_u32_props(struct bq25890_device *bq)
{
int ret;
u32 property;
int i;
struct bq25890_init_data *init = &bq->init_data;
struct {
char *name;
bool optional;
enum bq25890_table_ids tbl_id;
u8 *conv_data; /* holds converted value from given property */
} props[] = {
/* required properties */
{"ti,charge-current", false, TBL_ICHG, &init->ichg},
{"ti,battery-regulation-voltage", false, TBL_VREG, &init->vreg},
{"ti,termination-current", false, TBL_ITERM, &init->iterm},
{"ti,precharge-current", false, TBL_ITERM, &init->iprechg},
{"ti,minimum-sys-voltage", false, TBL_SYSVMIN, &init->sysvmin},
{"ti,boost-voltage", false, TBL_BOOSTV, &init->boostv},
{"ti,boost-max-current", false, TBL_BOOSTI, &init->boosti},
/* optional properties */
{"ti,thermal-regulation-threshold", true, TBL_TREG, &init->treg},
{"ti,ibatcomp-micro-ohms", true, TBL_RBATCOMP, &init->rbatcomp},
{"ti,ibatcomp-clamp-microvolt", true, TBL_VBATCOMP, &init->vclamp},
};
/* initialize data for optional properties */
init->treg = 3; /* 120 degrees Celsius */
init->rbatcomp = init->vclamp = 0; /* IBAT compensation disabled */
for (i = 0; i < ARRAY_SIZE(props); i++) {
ret = device_property_read_u32(bq->dev, props[i].name,
&property);
if (ret < 0) {
if (props[i].optional)
continue;
dev_err(bq->dev, "Unable to read property %d %s\n", ret,
props[i].name);
return ret;
}
*props[i].conv_data = bq25890_find_idx(property,
props[i].tbl_id);
}
return 0;
}
static int bq25890_fw_probe(struct bq25890_device *bq)
{
int ret;
struct bq25890_init_data *init = &bq->init_data;
const char *str;
u32 val;
ret = device_property_read_string(bq->dev, "linux,secondary-charger-name", &str);
if (ret == 0) {
bq->secondary_chrg = power_supply_get_by_name(str);
if (!bq->secondary_chrg)
return -EPROBE_DEFER;
}
/* Optional, left at 0 if property is not present */
device_property_read_u32(bq->dev, "linux,pump-express-vbus-max",
&bq->pump_express_vbus_max);
ret = device_property_read_u32(bq->dev, "linux,iinlim-percentage", &val);
if (ret == 0) {
if (val > 100) {
dev_err(bq->dev, "Error linux,iinlim-percentage %u > 100\n", val);
return -EINVAL;
}
bq->iinlim_percentage = val;
} else {
bq->iinlim_percentage = 100;
}
bq->skip_reset = device_property_read_bool(bq->dev, "linux,skip-reset");
bq->read_back_init_data = device_property_read_bool(bq->dev,
"linux,read-back-settings");
if (bq->read_back_init_data)
return 0;
ret = bq25890_fw_read_u32_props(bq);
if (ret < 0)
return ret;
init->ilim_en = device_property_read_bool(bq->dev, "ti,use-ilim-pin");
init->boostf = device_property_read_bool(bq->dev, "ti,boost-low-freq");
return 0;
}
static void bq25890_non_devm_cleanup(void *data)
{
struct bq25890_device *bq = data;
cancel_delayed_work_sync(&bq->pump_express_work);
if (bq->id >= 0) {
mutex_lock(&bq25890_id_mutex);
idr_remove(&bq25890_id, bq->id);
mutex_unlock(&bq25890_id_mutex);
}
}
static int bq25890_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct bq25890_device *bq;
int ret;
bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
if (!bq)
return -ENOMEM;
bq->client = client;
bq->dev = dev;
bq->id = -1;
mutex_init(&bq->lock);
INIT_DELAYED_WORK(&bq->pump_express_work, bq25890_pump_express_work);
bq->rmap = devm_regmap_init_i2c(client, &bq25890_regmap_config);
if (IS_ERR(bq->rmap))
return dev_err_probe(dev, PTR_ERR(bq->rmap),
"failed to allocate register map\n");
ret = devm_regmap_field_bulk_alloc(dev, bq->rmap, bq->rmap_fields,
bq25890_reg_fields, F_MAX_FIELDS);
if (ret)
return ret;
i2c_set_clientdata(client, bq);
ret = bq25890_get_chip_version(bq);
if (ret) {
dev_err(dev, "Cannot read chip ID or unknown chip: %d\n", ret);
return ret;
}
ret = bq25890_fw_probe(bq);
if (ret < 0)
return dev_err_probe(dev, ret, "reading device properties\n");
ret = bq25890_hw_init(bq);
if (ret < 0) {
dev_err(dev, "Cannot initialize the chip: %d\n", ret);
return ret;
}
if (client->irq <= 0)
client->irq = bq25890_irq_probe(bq);
if (client->irq < 0) {
dev_err(dev, "No irq resource found.\n");
return client->irq;
}
/* OTG reporting */
bq->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
/*
* This must be before bq25890_power_supply_init(), so that it runs
* after devm unregisters the power_supply.
*/
ret = devm_add_action_or_reset(dev, bq25890_non_devm_cleanup, bq);
if (ret)
return ret;
ret = bq25890_register_regulator(bq);
if (ret)
return ret;
ret = bq25890_power_supply_init(bq);
if (ret < 0)
return dev_err_probe(dev, ret, "registering power supply\n");
ret = devm_request_threaded_irq(dev, client->irq, NULL,
bq25890_irq_handler_thread,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
BQ25890_IRQ_PIN, bq);
if (ret)
return ret;
if (!IS_ERR_OR_NULL(bq->usb_phy)) {
INIT_WORK(&bq->usb_work, bq25890_usb_work);
bq->usb_nb.notifier_call = bq25890_usb_notifier;
usb_register_notifier(bq->usb_phy, &bq->usb_nb);
}
return 0;
}
static void bq25890_remove(struct i2c_client *client)
{
struct bq25890_device *bq = i2c_get_clientdata(client);
if (!IS_ERR_OR_NULL(bq->usb_phy)) {
usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
cancel_work_sync(&bq->usb_work);
}
if (!bq->skip_reset) {
/* reset all registers to default values */
bq25890_chip_reset(bq);
}
}
static void bq25890_shutdown(struct i2c_client *client)
{
struct bq25890_device *bq = i2c_get_clientdata(client);
/*
* TODO this if + return should probably be removed, but that would
* introduce a function change for boards using the usb-phy framework.
* This needs to be tested on such a board before making this change.
*/
if (!IS_ERR_OR_NULL(bq->usb_phy))
return;
/*
* Turn off the 5v Boost regulator which outputs Vbus to the device's
* Micro-USB or Type-C USB port. Leaving this on drains power and
* this avoids the PMIC on some device-models seeing this as Vbus
* getting inserted after shutdown, causing the device to immediately
* power-up again.
*/
bq25890_set_otg_cfg(bq, 0);
}
#ifdef CONFIG_PM_SLEEP
static int bq25890_suspend(struct device *dev)
{
struct bq25890_device *bq = dev_get_drvdata(dev);
/*
* If charger is removed, while in suspend, make sure ADC is diabled
* since it consumes slightly more power.
*/
return bq25890_field_write(bq, F_CONV_RATE, 0);
}
static int bq25890_resume(struct device *dev)
{
int ret;
struct bq25890_device *bq = dev_get_drvdata(dev);
mutex_lock(&bq->lock);
ret = bq25890_get_chip_state(bq, &bq->state);
if (ret < 0)
goto unlock;
/* Re-enable ADC only if charger is plugged in. */
if (bq->state.online) {
ret = bq25890_field_write(bq, F_CONV_RATE, 1);
if (ret < 0)
goto unlock;
}
/* signal userspace, maybe state changed while suspended */
power_supply_changed(bq->charger);
unlock:
mutex_unlock(&bq->lock);
return ret;
}
#endif
static const struct dev_pm_ops bq25890_pm = {
SET_SYSTEM_SLEEP_PM_OPS(bq25890_suspend, bq25890_resume)
};
static const struct i2c_device_id bq25890_i2c_ids[] = {
{ "bq25890", 0 },
{ "bq25892", 0 },
{ "bq25895", 0 },
{ "bq25896", 0 },
{},
};
MODULE_DEVICE_TABLE(i2c, bq25890_i2c_ids);
static const struct of_device_id bq25890_of_match[] __maybe_unused = {
{ .compatible = "ti,bq25890", },
{ .compatible = "ti,bq25892", },
{ .compatible = "ti,bq25895", },
{ .compatible = "ti,bq25896", },
{ },
};
MODULE_DEVICE_TABLE(of, bq25890_of_match);
#ifdef CONFIG_ACPI
static const struct acpi_device_id bq25890_acpi_match[] = {
{"BQ258900", 0},
{},
};
MODULE_DEVICE_TABLE(acpi, bq25890_acpi_match);
#endif
static struct i2c_driver bq25890_driver = {
.driver = {
.name = "bq25890-charger",
.of_match_table = of_match_ptr(bq25890_of_match),
.acpi_match_table = ACPI_PTR(bq25890_acpi_match),
.pm = &bq25890_pm,
},
.probe = bq25890_probe,
.remove = bq25890_remove,
.shutdown = bq25890_shutdown,
.id_table = bq25890_i2c_ids,
};
module_i2c_driver(bq25890_driver);
MODULE_AUTHOR("Laurentiu Palcu <[email protected]>");
MODULE_DESCRIPTION("bq25890 charger driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/bq25890_charger.c |
// SPDX-License-Identifier: GPL-2.0
//
// Copyright (C) 2021 Samuel Holland <[email protected]>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#define IP5XXX_SYS_CTL0 0x01
#define IP5XXX_SYS_CTL0_WLED_DET_EN BIT(4)
#define IP5XXX_SYS_CTL0_WLED_EN BIT(3)
#define IP5XXX_SYS_CTL0_BOOST_EN BIT(2)
#define IP5XXX_SYS_CTL0_CHARGER_EN BIT(1)
#define IP5XXX_SYS_CTL1 0x02
#define IP5XXX_SYS_CTL1_LIGHT_SHDN_EN BIT(1)
#define IP5XXX_SYS_CTL1_LOAD_PWRUP_EN BIT(0)
#define IP5XXX_SYS_CTL2 0x0c
#define IP5XXX_SYS_CTL2_LIGHT_SHDN_TH GENMASK(7, 3)
#define IP5XXX_SYS_CTL3 0x03
#define IP5XXX_SYS_CTL3_LONG_PRESS_TIME_SEL GENMASK(7, 6)
#define IP5XXX_SYS_CTL3_BTN_SHDN_EN BIT(5)
#define IP5XXX_SYS_CTL4 0x04
#define IP5XXX_SYS_CTL4_SHDN_TIME_SEL GENMASK(7, 6)
#define IP5XXX_SYS_CTL4_VIN_PULLOUT_BOOST_EN BIT(5)
#define IP5XXX_SYS_CTL5 0x07
#define IP5XXX_SYS_CTL5_NTC_DIS BIT(6)
#define IP5XXX_SYS_CTL5_WLED_MODE_SEL BIT(1)
#define IP5XXX_SYS_CTL5_BTN_SHDN_SEL BIT(0)
#define IP5XXX_CHG_CTL1 0x22
#define IP5XXX_CHG_CTL1_BOOST_UVP_SEL GENMASK(3, 2)
#define IP5XXX_CHG_CTL2 0x24
#define IP5XXX_CHG_CTL2_BAT_TYPE_SEL GENMASK(6, 5)
#define IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_2V (0x0 << 5)
#define IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_3V (0x1 << 5)
#define IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_35V (0x2 << 5)
#define IP5XXX_CHG_CTL2_CONST_VOLT_SEL GENMASK(2, 1)
#define IP5XXX_CHG_CTL4 0x26
#define IP5XXX_CHG_CTL4_BAT_TYPE_SEL_EN BIT(6)
#define IP5XXX_CHG_CTL4A 0x25
#define IP5XXX_CHG_CTL4A_CONST_CUR_SEL GENMASK(4, 0)
#define IP5XXX_MFP_CTL0 0x51
#define IP5XXX_MFP_CTL1 0x52
#define IP5XXX_GPIO_CTL2 0x53
#define IP5XXX_GPIO_CTL2A 0x54
#define IP5XXX_GPIO_CTL3 0x55
#define IP5XXX_READ0 0x71
#define IP5XXX_READ0_CHG_STAT GENMASK(7, 5)
#define IP5XXX_READ0_CHG_STAT_IDLE (0x0 << 5)
#define IP5XXX_READ0_CHG_STAT_TRICKLE (0x1 << 5)
#define IP5XXX_READ0_CHG_STAT_CONST_VOLT (0x2 << 5)
#define IP5XXX_READ0_CHG_STAT_CONST_CUR (0x3 << 5)
#define IP5XXX_READ0_CHG_STAT_CONST_VOLT_STOP (0x4 << 5)
#define IP5XXX_READ0_CHG_STAT_FULL (0x5 << 5)
#define IP5XXX_READ0_CHG_STAT_TIMEOUT (0x6 << 5)
#define IP5XXX_READ0_CHG_OP BIT(4)
#define IP5XXX_READ0_CHG_END BIT(3)
#define IP5XXX_READ0_CONST_VOLT_TIMEOUT BIT(2)
#define IP5XXX_READ0_CHG_TIMEOUT BIT(1)
#define IP5XXX_READ0_TRICKLE_TIMEOUT BIT(0)
#define IP5XXX_READ0_TIMEOUT GENMASK(2, 0)
#define IP5XXX_READ1 0x72
#define IP5XXX_READ1_WLED_PRESENT BIT(7)
#define IP5XXX_READ1_LIGHT_LOAD BIT(6)
#define IP5XXX_READ1_VIN_OVERVOLT BIT(5)
#define IP5XXX_READ2 0x77
#define IP5XXX_READ2_BTN_PRESS BIT(3)
#define IP5XXX_READ2_BTN_LONG_PRESS BIT(1)
#define IP5XXX_READ2_BTN_SHORT_PRESS BIT(0)
#define IP5XXX_BATVADC_DAT0 0xa2
#define IP5XXX_BATVADC_DAT1 0xa3
#define IP5XXX_BATIADC_DAT0 0xa4
#define IP5XXX_BATIADC_DAT1 0xa5
#define IP5XXX_BATOCV_DAT0 0xa8
#define IP5XXX_BATOCV_DAT1 0xa9
struct ip5xxx {
struct regmap *regmap;
bool initialized;
};
/*
* The IP5xxx charger only responds on I2C when it is "awake". The charger is
* generally only awake when VIN is powered or when its boost converter is
* enabled. Going into shutdown resets all register values. To handle this:
* 1) When any bus error occurs, assume the charger has gone into shutdown.
* 2) Attempt the initialization sequence on each subsequent register access
* until it succeeds.
*/
static int ip5xxx_read(struct ip5xxx *ip5xxx, unsigned int reg,
unsigned int *val)
{
int ret;
ret = regmap_read(ip5xxx->regmap, reg, val);
if (ret)
ip5xxx->initialized = false;
return ret;
}
static int ip5xxx_update_bits(struct ip5xxx *ip5xxx, unsigned int reg,
unsigned int mask, unsigned int val)
{
int ret;
ret = regmap_update_bits(ip5xxx->regmap, reg, mask, val);
if (ret)
ip5xxx->initialized = false;
return ret;
}
static int ip5xxx_initialize(struct power_supply *psy)
{
struct ip5xxx *ip5xxx = power_supply_get_drvdata(psy);
int ret;
if (ip5xxx->initialized)
return 0;
/*
* Disable shutdown under light load.
* Enable power on when under load.
*/
ret = ip5xxx_update_bits(ip5xxx, IP5XXX_SYS_CTL1,
IP5XXX_SYS_CTL1_LIGHT_SHDN_EN |
IP5XXX_SYS_CTL1_LOAD_PWRUP_EN,
IP5XXX_SYS_CTL1_LOAD_PWRUP_EN);
if (ret)
return ret;
/*
* Enable shutdown after a long button press (as configured below).
*/
ret = ip5xxx_update_bits(ip5xxx, IP5XXX_SYS_CTL3,
IP5XXX_SYS_CTL3_BTN_SHDN_EN,
IP5XXX_SYS_CTL3_BTN_SHDN_EN);
if (ret)
return ret;
/*
* Power on automatically when VIN is removed.
*/
ret = ip5xxx_update_bits(ip5xxx, IP5XXX_SYS_CTL4,
IP5XXX_SYS_CTL4_VIN_PULLOUT_BOOST_EN,
IP5XXX_SYS_CTL4_VIN_PULLOUT_BOOST_EN);
if (ret)
return ret;
/*
* Enable the NTC.
* Configure the button for two presses => LED, long press => shutdown.
*/
ret = ip5xxx_update_bits(ip5xxx, IP5XXX_SYS_CTL5,
IP5XXX_SYS_CTL5_NTC_DIS |
IP5XXX_SYS_CTL5_WLED_MODE_SEL |
IP5XXX_SYS_CTL5_BTN_SHDN_SEL,
IP5XXX_SYS_CTL5_WLED_MODE_SEL |
IP5XXX_SYS_CTL5_BTN_SHDN_SEL);
if (ret)
return ret;
ip5xxx->initialized = true;
dev_dbg(psy->dev.parent, "Initialized after power on\n");
return 0;
}
static const enum power_supply_property ip5xxx_battery_properties[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_OCV,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
};
static int ip5xxx_battery_get_status(struct ip5xxx *ip5xxx, int *val)
{
unsigned int rval;
int ret;
ret = ip5xxx_read(ip5xxx, IP5XXX_READ0, &rval);
if (ret)
return ret;
switch (rval & IP5XXX_READ0_CHG_STAT) {
case IP5XXX_READ0_CHG_STAT_IDLE:
*val = POWER_SUPPLY_STATUS_DISCHARGING;
break;
case IP5XXX_READ0_CHG_STAT_TRICKLE:
case IP5XXX_READ0_CHG_STAT_CONST_CUR:
case IP5XXX_READ0_CHG_STAT_CONST_VOLT:
*val = POWER_SUPPLY_STATUS_CHARGING;
break;
case IP5XXX_READ0_CHG_STAT_CONST_VOLT_STOP:
case IP5XXX_READ0_CHG_STAT_FULL:
*val = POWER_SUPPLY_STATUS_FULL;
break;
case IP5XXX_READ0_CHG_STAT_TIMEOUT:
*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
default:
return -EINVAL;
}
return 0;
}
static int ip5xxx_battery_get_charge_type(struct ip5xxx *ip5xxx, int *val)
{
unsigned int rval;
int ret;
ret = ip5xxx_read(ip5xxx, IP5XXX_READ0, &rval);
if (ret)
return ret;
switch (rval & IP5XXX_READ0_CHG_STAT) {
case IP5XXX_READ0_CHG_STAT_IDLE:
case IP5XXX_READ0_CHG_STAT_CONST_VOLT_STOP:
case IP5XXX_READ0_CHG_STAT_FULL:
case IP5XXX_READ0_CHG_STAT_TIMEOUT:
*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
case IP5XXX_READ0_CHG_STAT_TRICKLE:
*val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
case IP5XXX_READ0_CHG_STAT_CONST_CUR:
case IP5XXX_READ0_CHG_STAT_CONST_VOLT:
*val = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
break;
default:
return -EINVAL;
}
return 0;
}
static int ip5xxx_battery_get_health(struct ip5xxx *ip5xxx, int *val)
{
unsigned int rval;
int ret;
ret = ip5xxx_read(ip5xxx, IP5XXX_READ0, &rval);
if (ret)
return ret;
if (rval & IP5XXX_READ0_TIMEOUT)
*val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
else
*val = POWER_SUPPLY_HEALTH_GOOD;
return 0;
}
static int ip5xxx_battery_get_voltage_max(struct ip5xxx *ip5xxx, int *val)
{
unsigned int rval;
int ret;
ret = ip5xxx_read(ip5xxx, IP5XXX_CHG_CTL2, &rval);
if (ret)
return ret;
/*
* It is not clear what this will return if
* IP5XXX_CHG_CTL4_BAT_TYPE_SEL_EN is not set...
*/
switch (rval & IP5XXX_CHG_CTL2_BAT_TYPE_SEL) {
case IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_2V:
*val = 4200000;
break;
case IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_3V:
*val = 4300000;
break;
case IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_35V:
*val = 4350000;
break;
default:
return -EINVAL;
}
return 0;
}
static int ip5xxx_battery_read_adc(struct ip5xxx *ip5xxx,
u8 lo_reg, u8 hi_reg, int *val)
{
unsigned int hi, lo;
int ret;
ret = ip5xxx_read(ip5xxx, lo_reg, &lo);
if (ret)
return ret;
ret = ip5xxx_read(ip5xxx, hi_reg, &hi);
if (ret)
return ret;
*val = sign_extend32(hi << 8 | lo, 13);
return 0;
}
static int ip5xxx_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct ip5xxx *ip5xxx = power_supply_get_drvdata(psy);
int raw, ret, vmax;
unsigned int rval;
ret = ip5xxx_initialize(psy);
if (ret)
return ret;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
return ip5xxx_battery_get_status(ip5xxx, &val->intval);
case POWER_SUPPLY_PROP_CHARGE_TYPE:
return ip5xxx_battery_get_charge_type(ip5xxx, &val->intval);
case POWER_SUPPLY_PROP_HEALTH:
return ip5xxx_battery_get_health(ip5xxx, &val->intval);
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
return ip5xxx_battery_get_voltage_max(ip5xxx, &val->intval);
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = ip5xxx_battery_read_adc(ip5xxx, IP5XXX_BATVADC_DAT0,
IP5XXX_BATVADC_DAT1, &raw);
val->intval = 2600000 + DIV_ROUND_CLOSEST(raw * 26855, 100);
return 0;
case POWER_SUPPLY_PROP_VOLTAGE_OCV:
ret = ip5xxx_battery_read_adc(ip5xxx, IP5XXX_BATOCV_DAT0,
IP5XXX_BATOCV_DAT1, &raw);
val->intval = 2600000 + DIV_ROUND_CLOSEST(raw * 26855, 100);
return 0;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = ip5xxx_battery_read_adc(ip5xxx, IP5XXX_BATIADC_DAT0,
IP5XXX_BATIADC_DAT1, &raw);
val->intval = DIV_ROUND_CLOSEST(raw * 149197, 200);
return 0;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = ip5xxx_read(ip5xxx, IP5XXX_CHG_CTL4A, &rval);
if (ret)
return ret;
rval &= IP5XXX_CHG_CTL4A_CONST_CUR_SEL;
val->intval = 100000 * rval;
return 0;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
val->intval = 100000 * 0x1f;
return 0;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = ip5xxx_battery_get_voltage_max(ip5xxx, &vmax);
if (ret)
return ret;
ret = ip5xxx_read(ip5xxx, IP5XXX_CHG_CTL2, &rval);
if (ret)
return ret;
rval &= IP5XXX_CHG_CTL2_CONST_VOLT_SEL;
val->intval = vmax + 14000 * (rval >> 1);
return 0;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
ret = ip5xxx_battery_get_voltage_max(ip5xxx, &vmax);
if (ret)
return ret;
val->intval = vmax + 14000 * 3;
return 0;
default:
return -EINVAL;
}
}
static int ip5xxx_battery_set_voltage_max(struct ip5xxx *ip5xxx, int val)
{
unsigned int rval;
int ret;
switch (val) {
case 4200000:
rval = IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_2V;
break;
case 4300000:
rval = IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_3V;
break;
case 4350000:
rval = IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_35V;
break;
default:
return -EINVAL;
}
ret = ip5xxx_update_bits(ip5xxx, IP5XXX_CHG_CTL2,
IP5XXX_CHG_CTL2_BAT_TYPE_SEL, rval);
if (ret)
return ret;
ret = ip5xxx_update_bits(ip5xxx, IP5XXX_CHG_CTL4,
IP5XXX_CHG_CTL4_BAT_TYPE_SEL_EN,
IP5XXX_CHG_CTL4_BAT_TYPE_SEL_EN);
if (ret)
return ret;
return 0;
}
static int ip5xxx_battery_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct ip5xxx *ip5xxx = power_supply_get_drvdata(psy);
unsigned int rval;
int ret, vmax;
ret = ip5xxx_initialize(psy);
if (ret)
return ret;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
switch (val->intval) {
case POWER_SUPPLY_STATUS_CHARGING:
rval = IP5XXX_SYS_CTL0_CHARGER_EN;
break;
case POWER_SUPPLY_STATUS_DISCHARGING:
case POWER_SUPPLY_STATUS_NOT_CHARGING:
rval = 0;
break;
default:
return -EINVAL;
}
return ip5xxx_update_bits(ip5xxx, IP5XXX_SYS_CTL0,
IP5XXX_SYS_CTL0_CHARGER_EN, rval);
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
return ip5xxx_battery_set_voltage_max(ip5xxx, val->intval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
rval = val->intval / 100000;
return ip5xxx_update_bits(ip5xxx, IP5XXX_CHG_CTL4A,
IP5XXX_CHG_CTL4A_CONST_CUR_SEL, rval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = ip5xxx_battery_get_voltage_max(ip5xxx, &vmax);
if (ret)
return ret;
rval = ((val->intval - vmax) / 14000) << 1;
return ip5xxx_update_bits(ip5xxx, IP5XXX_CHG_CTL2,
IP5XXX_CHG_CTL2_CONST_VOLT_SEL, rval);
default:
return -EINVAL;
}
}
static int ip5xxx_battery_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
return psp == POWER_SUPPLY_PROP_STATUS ||
psp == POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN ||
psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT ||
psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE;
}
static const struct power_supply_desc ip5xxx_battery_desc = {
.name = "ip5xxx-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = ip5xxx_battery_properties,
.num_properties = ARRAY_SIZE(ip5xxx_battery_properties),
.get_property = ip5xxx_battery_get_property,
.set_property = ip5xxx_battery_set_property,
.property_is_writeable = ip5xxx_battery_property_is_writeable,
};
static const enum power_supply_property ip5xxx_boost_properties[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
};
static int ip5xxx_boost_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct ip5xxx *ip5xxx = power_supply_get_drvdata(psy);
unsigned int rval;
int ret;
ret = ip5xxx_initialize(psy);
if (ret)
return ret;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
ret = ip5xxx_read(ip5xxx, IP5XXX_SYS_CTL0, &rval);
if (ret)
return ret;
val->intval = !!(rval & IP5XXX_SYS_CTL0_BOOST_EN);
return 0;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
ret = ip5xxx_read(ip5xxx, IP5XXX_CHG_CTL1, &rval);
if (ret)
return ret;
rval &= IP5XXX_CHG_CTL1_BOOST_UVP_SEL;
val->intval = 4530000 + 100000 * (rval >> 2);
return 0;
default:
return -EINVAL;
}
}
static int ip5xxx_boost_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct ip5xxx *ip5xxx = power_supply_get_drvdata(psy);
unsigned int rval;
int ret;
ret = ip5xxx_initialize(psy);
if (ret)
return ret;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
rval = val->intval ? IP5XXX_SYS_CTL0_BOOST_EN : 0;
return ip5xxx_update_bits(ip5xxx, IP5XXX_SYS_CTL0,
IP5XXX_SYS_CTL0_BOOST_EN, rval);
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
rval = ((val->intval - 4530000) / 100000) << 2;
return ip5xxx_update_bits(ip5xxx, IP5XXX_CHG_CTL1,
IP5XXX_CHG_CTL1_BOOST_UVP_SEL, rval);
default:
return -EINVAL;
}
}
static int ip5xxx_boost_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
return true;
}
static const struct power_supply_desc ip5xxx_boost_desc = {
.name = "ip5xxx-boost",
.type = POWER_SUPPLY_TYPE_USB,
.properties = ip5xxx_boost_properties,
.num_properties = ARRAY_SIZE(ip5xxx_boost_properties),
.get_property = ip5xxx_boost_get_property,
.set_property = ip5xxx_boost_set_property,
.property_is_writeable = ip5xxx_boost_property_is_writeable,
};
static const struct regmap_config ip5xxx_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = IP5XXX_BATOCV_DAT1,
};
static int ip5xxx_power_probe(struct i2c_client *client)
{
struct power_supply_config psy_cfg = {};
struct device *dev = &client->dev;
struct power_supply *psy;
struct ip5xxx *ip5xxx;
ip5xxx = devm_kzalloc(dev, sizeof(*ip5xxx), GFP_KERNEL);
if (!ip5xxx)
return -ENOMEM;
ip5xxx->regmap = devm_regmap_init_i2c(client, &ip5xxx_regmap_config);
if (IS_ERR(ip5xxx->regmap))
return PTR_ERR(ip5xxx->regmap);
psy_cfg.of_node = dev->of_node;
psy_cfg.drv_data = ip5xxx;
psy = devm_power_supply_register(dev, &ip5xxx_battery_desc, &psy_cfg);
if (IS_ERR(psy))
return PTR_ERR(psy);
psy = devm_power_supply_register(dev, &ip5xxx_boost_desc, &psy_cfg);
if (IS_ERR(psy))
return PTR_ERR(psy);
return 0;
}
static const struct of_device_id ip5xxx_power_of_match[] = {
{ .compatible = "injoinic,ip5108" },
{ .compatible = "injoinic,ip5109" },
{ .compatible = "injoinic,ip5207" },
{ .compatible = "injoinic,ip5209" },
{ }
};
MODULE_DEVICE_TABLE(of, ip5xxx_power_of_match);
static struct i2c_driver ip5xxx_power_driver = {
.probe = ip5xxx_power_probe,
.driver = {
.name = "ip5xxx-power",
.of_match_table = ip5xxx_power_of_match,
}
};
module_i2c_driver(ip5xxx_power_driver);
MODULE_AUTHOR("Samuel Holland <[email protected]>");
MODULE_DESCRIPTION("Injoinic IP5xxx power bank IC driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/ip5xxx_power.c |
// SPDX-License-Identifier: GPL-2.0
/*
* BQ27xxx battery driver
*
* Copyright (C) 2008 Rodolfo Giometti <[email protected]>
* Copyright (C) 2008 Eurotech S.p.A. <[email protected]>
* Copyright (C) 2010-2011 Lars-Peter Clausen <[email protected]>
* Copyright (C) 2011 Pali Rohár <[email protected]>
* Copyright (C) 2017 Liam Breck <[email protected]>
*
* Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc.
*
* Datasheets:
* https://www.ti.com/product/bq27000
* https://www.ti.com/product/bq27200
* https://www.ti.com/product/bq27010
* https://www.ti.com/product/bq27210
* https://www.ti.com/product/bq27500
* https://www.ti.com/product/bq27510-g1
* https://www.ti.com/product/bq27510-g2
* https://www.ti.com/product/bq27510-g3
* https://www.ti.com/product/bq27520-g1
* https://www.ti.com/product/bq27520-g2
* https://www.ti.com/product/bq27520-g3
* https://www.ti.com/product/bq27520-g4
* https://www.ti.com/product/bq27530-g1
* https://www.ti.com/product/bq27531-g1
* https://www.ti.com/product/bq27541-g1
* https://www.ti.com/product/bq27542-g1
* https://www.ti.com/product/bq27546-g1
* https://www.ti.com/product/bq27742-g1
* https://www.ti.com/product/bq27545-g1
* https://www.ti.com/product/bq27421-g1
* https://www.ti.com/product/bq27425-g1
* https://www.ti.com/product/bq27426
* https://www.ti.com/product/bq27411-g1
* https://www.ti.com/product/bq27441-g1
* https://www.ti.com/product/bq27621-g1
* https://www.ti.com/product/bq27z561
* https://www.ti.com/product/bq28z610
* https://www.ti.com/product/bq34z100-g1
* https://www.ti.com/product/bq78z100
*/
#include <linux/device.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/param.h>
#include <linux/jiffies.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/power/bq27xxx_battery.h>
#define BQ27XXX_MANUFACTURER "Texas Instruments"
/* BQ27XXX Flags */
#define BQ27XXX_FLAG_DSC BIT(0)
#define BQ27XXX_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */
#define BQ27XXX_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */
#define BQ27XXX_FLAG_CFGUP BIT(4)
#define BQ27XXX_FLAG_FC BIT(9)
#define BQ27XXX_FLAG_OTD BIT(14)
#define BQ27XXX_FLAG_OTC BIT(15)
#define BQ27XXX_FLAG_UT BIT(14)
#define BQ27XXX_FLAG_OT BIT(15)
/* BQ27000 has different layout for Flags register */
#define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */
#define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */
#define BQ27000_FLAG_CI BIT(4) /* Capacity Inaccurate flag */
#define BQ27000_FLAG_FC BIT(5)
#define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */
/* BQ27Z561 has different layout for Flags register */
#define BQ27Z561_FLAG_FDC BIT(4) /* Battery fully discharged */
#define BQ27Z561_FLAG_FC BIT(5) /* Battery fully charged */
#define BQ27Z561_FLAG_DIS_CH BIT(6) /* Battery is discharging */
/* control register params */
#define BQ27XXX_SEALED 0x20
#define BQ27XXX_SET_CFGUPDATE 0x13
#define BQ27XXX_SOFT_RESET 0x42
#define BQ27XXX_RESET 0x41
#define BQ27XXX_RS (20) /* Resistor sense mOhm */
#define BQ27XXX_POWER_CONSTANT (29200) /* 29.2 µV^2 * 1000 */
#define BQ27XXX_CURRENT_CONSTANT (3570) /* 3.57 µV * 1000 */
#define INVALID_REG_ADDR 0xff
/*
* bq27xxx_reg_index - Register names
*
* These are indexes into a device's register mapping array.
*/
enum bq27xxx_reg_index {
BQ27XXX_REG_CTRL = 0, /* Control */
BQ27XXX_REG_TEMP, /* Temperature */
BQ27XXX_REG_INT_TEMP, /* Internal Temperature */
BQ27XXX_REG_VOLT, /* Voltage */
BQ27XXX_REG_AI, /* Average Current */
BQ27XXX_REG_FLAGS, /* Flags */
BQ27XXX_REG_TTE, /* Time-to-Empty */
BQ27XXX_REG_TTF, /* Time-to-Full */
BQ27XXX_REG_TTES, /* Time-to-Empty Standby */
BQ27XXX_REG_TTECP, /* Time-to-Empty at Constant Power */
BQ27XXX_REG_NAC, /* Nominal Available Capacity */
BQ27XXX_REG_RC, /* Remaining Capacity */
BQ27XXX_REG_FCC, /* Full Charge Capacity */
BQ27XXX_REG_CYCT, /* Cycle Count */
BQ27XXX_REG_AE, /* Available Energy */
BQ27XXX_REG_SOC, /* State-of-Charge */
BQ27XXX_REG_DCAP, /* Design Capacity */
BQ27XXX_REG_AP, /* Average Power */
BQ27XXX_DM_CTRL, /* Block Data Control */
BQ27XXX_DM_CLASS, /* Data Class */
BQ27XXX_DM_BLOCK, /* Data Block */
BQ27XXX_DM_DATA, /* Block Data */
BQ27XXX_DM_CKSUM, /* Block Data Checksum */
BQ27XXX_REG_MAX, /* sentinel */
};
#define BQ27XXX_DM_REG_ROWS \
[BQ27XXX_DM_CTRL] = 0x61, \
[BQ27XXX_DM_CLASS] = 0x3e, \
[BQ27XXX_DM_BLOCK] = 0x3f, \
[BQ27XXX_DM_DATA] = 0x40, \
[BQ27XXX_DM_CKSUM] = 0x60
/* Register mappings */
static u8
bq27000_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = 0x18,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = 0x26,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_RC] = INVALID_REG_ADDR,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = 0x22,
[BQ27XXX_REG_SOC] = 0x0b,
[BQ27XXX_REG_DCAP] = 0x76,
[BQ27XXX_REG_AP] = 0x24,
[BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
[BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
[BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
[BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
[BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
},
bq27010_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = 0x18,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = 0x26,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_RC] = INVALID_REG_ADDR,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x0b,
[BQ27XXX_REG_DCAP] = 0x76,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
[BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
[BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
[BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
[BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
[BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
},
bq2750x_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x28,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = 0x1a,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_RC] = 0x10,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
BQ27XXX_DM_REG_ROWS,
},
#define bq2751x_regs bq27510g3_regs
#define bq2752x_regs bq27510g3_regs
bq27500_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = 0x18,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = 0x26,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_RC] = 0x10,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = 0x22,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
#define bq27510g1_regs bq27500_regs
#define bq27510g2_regs bq27500_regs
bq27510g3_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x28,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = 0x1a,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_RC] = 0x10,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x1e,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x20,
[BQ27XXX_REG_DCAP] = 0x2e,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
BQ27XXX_DM_REG_ROWS,
},
bq27520g1_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = 0x18,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = 0x26,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_RC] = 0x10,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
[BQ27XXX_REG_AE] = 0x22,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
bq27520g2_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x36,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = 0x18,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = 0x26,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_RC] = 0x10,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = 0x22,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
bq27520g3_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x36,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = 0x26,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_RC] = 0x10,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = 0x22,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
bq27520g4_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x28,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_RC] = 0x10,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x1e,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x20,
[BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
BQ27XXX_DM_REG_ROWS,
},
bq27521_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x02,
[BQ27XXX_REG_TEMP] = 0x0a,
[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
[BQ27XXX_REG_VOLT] = 0x0c,
[BQ27XXX_REG_AI] = 0x0e,
[BQ27XXX_REG_FLAGS] = 0x08,
[BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
[BQ27XXX_REG_RC] = INVALID_REG_ADDR,
[BQ27XXX_REG_FCC] = INVALID_REG_ADDR,
[BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = INVALID_REG_ADDR,
[BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
[BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
[BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
[BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
[BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
[BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
},
bq27530_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x32,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_RC] = 0x10,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
#define bq27531_regs bq27530_regs
bq27541_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x28,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_RC] = 0x10,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
#define bq27542_regs bq27541_regs
#define bq27546_regs bq27541_regs
#define bq27742_regs bq27541_regs
bq27545_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x28,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_RC] = 0x10,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
bq27421_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x02,
[BQ27XXX_REG_INT_TEMP] = 0x1e,
[BQ27XXX_REG_VOLT] = 0x04,
[BQ27XXX_REG_AI] = 0x10,
[BQ27XXX_REG_FLAGS] = 0x06,
[BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = 0x08,
[BQ27XXX_REG_RC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x0e,
[BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x1c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x18,
BQ27XXX_DM_REG_ROWS,
},
#define bq27411_regs bq27421_regs
#define bq27425_regs bq27421_regs
#define bq27426_regs bq27421_regs
#define bq27441_regs bq27421_regs
#define bq27621_regs bq27421_regs
bq27z561_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = 0x18,
[BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
[BQ27XXX_REG_RC] = 0x10,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = 0x22,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x22,
BQ27XXX_DM_REG_ROWS,
},
bq28z610_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = 0x18,
[BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
[BQ27XXX_REG_RC] = 0x10,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = 0x22,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x22,
BQ27XXX_DM_REG_ROWS,
},
bq34z100_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x0c,
[BQ27XXX_REG_INT_TEMP] = 0x2a,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x0a,
[BQ27XXX_REG_FLAGS] = 0x0e,
[BQ27XXX_REG_TTE] = 0x18,
[BQ27XXX_REG_TTF] = 0x1a,
[BQ27XXX_REG_TTES] = 0x1e,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
[BQ27XXX_REG_RC] = 0x04,
[BQ27XXX_REG_FCC] = 0x06,
[BQ27XXX_REG_CYCT] = 0x2c,
[BQ27XXX_REG_AE] = 0x24,
[BQ27XXX_REG_SOC] = 0x02,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x22,
BQ27XXX_DM_REG_ROWS,
},
bq78z100_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x28,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = 0x18,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
[BQ27XXX_REG_RC] = 0x10,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x22,
BQ27XXX_DM_REG_ROWS,
};
static enum power_supply_property bq27000_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27010_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
#define bq2750x_props bq27510g3_props
#define bq2751x_props bq27510g3_props
#define bq2752x_props bq27510g3_props
static enum power_supply_property bq27500_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
#define bq27510g1_props bq27500_props
#define bq27510g2_props bq27500_props
static enum power_supply_property bq27510g3_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27520g1_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
#define bq27520g2_props bq27500_props
static enum power_supply_property bq27520g3_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27520g4_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27521_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TECHNOLOGY,
};
static enum power_supply_property bq27530_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_MANUFACTURER,
};
#define bq27531_props bq27530_props
static enum power_supply_property bq27541_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
#define bq27542_props bq27541_props
#define bq27546_props bq27541_props
#define bq27742_props bq27541_props
static enum power_supply_property bq27545_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27421_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_MANUFACTURER,
};
#define bq27411_props bq27421_props
#define bq27425_props bq27421_props
#define bq27426_props bq27421_props
#define bq27441_props bq27421_props
#define bq27621_props bq27421_props
static enum power_supply_property bq27z561_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq28z610_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq34z100_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq78z100_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
struct bq27xxx_dm_reg {
u8 subclass_id;
u8 offset;
u8 bytes;
u16 min, max;
};
enum bq27xxx_dm_reg_id {
BQ27XXX_DM_DESIGN_CAPACITY = 0,
BQ27XXX_DM_DESIGN_ENERGY,
BQ27XXX_DM_TERMINATE_VOLTAGE,
};
#define bq27000_dm_regs NULL
#define bq27010_dm_regs NULL
#define bq2750x_dm_regs NULL
#define bq2751x_dm_regs NULL
#define bq2752x_dm_regs NULL
#if 0 /* not yet tested */
static struct bq27xxx_dm_reg bq27500_dm_regs[] = {
[BQ27XXX_DM_DESIGN_CAPACITY] = { 48, 10, 2, 0, 65535 },
[BQ27XXX_DM_DESIGN_ENERGY] = { }, /* missing on chip */
[BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 48, 2, 1000, 32767 },
};
#else
#define bq27500_dm_regs NULL
#endif
/* todo create data memory definitions from datasheets and test on chips */
#define bq27510g1_dm_regs NULL
#define bq27510g2_dm_regs NULL
#define bq27510g3_dm_regs NULL
#define bq27520g1_dm_regs NULL
#define bq27520g2_dm_regs NULL
#define bq27520g3_dm_regs NULL
#define bq27520g4_dm_regs NULL
#define bq27521_dm_regs NULL
#define bq27530_dm_regs NULL
#define bq27531_dm_regs NULL
#define bq27541_dm_regs NULL
#define bq27542_dm_regs NULL
#define bq27546_dm_regs NULL
#define bq27742_dm_regs NULL
#if 0 /* not yet tested */
static struct bq27xxx_dm_reg bq27545_dm_regs[] = {
[BQ27XXX_DM_DESIGN_CAPACITY] = { 48, 23, 2, 0, 32767 },
[BQ27XXX_DM_DESIGN_ENERGY] = { 48, 25, 2, 0, 32767 },
[BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 67, 2, 2800, 3700 },
};
#else
#define bq27545_dm_regs NULL
#endif
static struct bq27xxx_dm_reg bq27411_dm_regs[] = {
[BQ27XXX_DM_DESIGN_CAPACITY] = { 82, 10, 2, 0, 32767 },
[BQ27XXX_DM_DESIGN_ENERGY] = { 82, 12, 2, 0, 32767 },
[BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 16, 2, 2800, 3700 },
};
static struct bq27xxx_dm_reg bq27421_dm_regs[] = {
[BQ27XXX_DM_DESIGN_CAPACITY] = { 82, 10, 2, 0, 8000 },
[BQ27XXX_DM_DESIGN_ENERGY] = { 82, 12, 2, 0, 32767 },
[BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 16, 2, 2500, 3700 },
};
static struct bq27xxx_dm_reg bq27425_dm_regs[] = {
[BQ27XXX_DM_DESIGN_CAPACITY] = { 82, 12, 2, 0, 32767 },
[BQ27XXX_DM_DESIGN_ENERGY] = { 82, 14, 2, 0, 32767 },
[BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 18, 2, 2800, 3700 },
};
static struct bq27xxx_dm_reg bq27426_dm_regs[] = {
[BQ27XXX_DM_DESIGN_CAPACITY] = { 82, 6, 2, 0, 8000 },
[BQ27XXX_DM_DESIGN_ENERGY] = { 82, 8, 2, 0, 32767 },
[BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 10, 2, 2500, 3700 },
};
#if 0 /* not yet tested */
#define bq27441_dm_regs bq27421_dm_regs
#else
#define bq27441_dm_regs NULL
#endif
#if 0 /* not yet tested */
static struct bq27xxx_dm_reg bq27621_dm_regs[] = {
[BQ27XXX_DM_DESIGN_CAPACITY] = { 82, 3, 2, 0, 8000 },
[BQ27XXX_DM_DESIGN_ENERGY] = { 82, 5, 2, 0, 32767 },
[BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 9, 2, 2500, 3700 },
};
#else
#define bq27621_dm_regs NULL
#endif
#define bq27z561_dm_regs NULL
#define bq28z610_dm_regs NULL
#define bq34z100_dm_regs NULL
#define bq78z100_dm_regs NULL
#define BQ27XXX_O_ZERO BIT(0)
#define BQ27XXX_O_OTDC BIT(1) /* has OTC/OTD overtemperature flags */
#define BQ27XXX_O_UTOT BIT(2) /* has OT overtemperature flag */
#define BQ27XXX_O_CFGUP BIT(3)
#define BQ27XXX_O_RAM BIT(4)
#define BQ27Z561_O_BITS BIT(5)
#define BQ27XXX_O_SOC_SI BIT(6) /* SoC is single register */
#define BQ27XXX_O_HAS_CI BIT(7) /* has Capacity Inaccurate flag */
#define BQ27XXX_O_MUL_CHEM BIT(8) /* multiple chemistries supported */
#define BQ27XXX_DATA(ref, key, opt) { \
.opts = (opt), \
.unseal_key = key, \
.regs = ref##_regs, \
.dm_regs = ref##_dm_regs, \
.props = ref##_props, \
.props_size = ARRAY_SIZE(ref##_props) }
static struct {
u32 opts;
u32 unseal_key;
u8 *regs;
struct bq27xxx_dm_reg *dm_regs;
enum power_supply_property *props;
size_t props_size;
} bq27xxx_chip_data[] = {
[BQ27000] = BQ27XXX_DATA(bq27000, 0 , BQ27XXX_O_ZERO | BQ27XXX_O_SOC_SI | BQ27XXX_O_HAS_CI),
[BQ27010] = BQ27XXX_DATA(bq27010, 0 , BQ27XXX_O_ZERO | BQ27XXX_O_SOC_SI | BQ27XXX_O_HAS_CI),
[BQ2750X] = BQ27XXX_DATA(bq2750x, 0 , BQ27XXX_O_OTDC),
[BQ2751X] = BQ27XXX_DATA(bq2751x, 0 , BQ27XXX_O_OTDC),
[BQ2752X] = BQ27XXX_DATA(bq2752x, 0 , BQ27XXX_O_OTDC),
[BQ27500] = BQ27XXX_DATA(bq27500, 0x04143672, BQ27XXX_O_OTDC),
[BQ27510G1] = BQ27XXX_DATA(bq27510g1, 0 , BQ27XXX_O_OTDC),
[BQ27510G2] = BQ27XXX_DATA(bq27510g2, 0 , BQ27XXX_O_OTDC),
[BQ27510G3] = BQ27XXX_DATA(bq27510g3, 0 , BQ27XXX_O_OTDC),
[BQ27520G1] = BQ27XXX_DATA(bq27520g1, 0 , BQ27XXX_O_OTDC),
[BQ27520G2] = BQ27XXX_DATA(bq27520g2, 0 , BQ27XXX_O_OTDC),
[BQ27520G3] = BQ27XXX_DATA(bq27520g3, 0 , BQ27XXX_O_OTDC),
[BQ27520G4] = BQ27XXX_DATA(bq27520g4, 0 , BQ27XXX_O_OTDC),
[BQ27521] = BQ27XXX_DATA(bq27521, 0 , 0),
[BQ27530] = BQ27XXX_DATA(bq27530, 0 , BQ27XXX_O_UTOT),
[BQ27531] = BQ27XXX_DATA(bq27531, 0 , BQ27XXX_O_UTOT),
[BQ27541] = BQ27XXX_DATA(bq27541, 0 , BQ27XXX_O_OTDC),
[BQ27542] = BQ27XXX_DATA(bq27542, 0 , BQ27XXX_O_OTDC),
[BQ27546] = BQ27XXX_DATA(bq27546, 0 , BQ27XXX_O_OTDC),
[BQ27742] = BQ27XXX_DATA(bq27742, 0 , BQ27XXX_O_OTDC),
[BQ27545] = BQ27XXX_DATA(bq27545, 0x04143672, BQ27XXX_O_OTDC),
[BQ27411] = BQ27XXX_DATA(bq27411, 0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
[BQ27421] = BQ27XXX_DATA(bq27421, 0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
[BQ27425] = BQ27XXX_DATA(bq27425, 0x04143672, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP),
[BQ27426] = BQ27XXX_DATA(bq27426, 0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
[BQ27441] = BQ27XXX_DATA(bq27441, 0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
[BQ27621] = BQ27XXX_DATA(bq27621, 0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
[BQ27Z561] = BQ27XXX_DATA(bq27z561, 0 , BQ27Z561_O_BITS),
[BQ28Z610] = BQ27XXX_DATA(bq28z610, 0 , BQ27Z561_O_BITS),
[BQ34Z100] = BQ27XXX_DATA(bq34z100, 0 , BQ27XXX_O_OTDC | BQ27XXX_O_SOC_SI | \
BQ27XXX_O_HAS_CI | BQ27XXX_O_MUL_CHEM),
[BQ78Z100] = BQ27XXX_DATA(bq78z100, 0 , BQ27Z561_O_BITS),
};
static DEFINE_MUTEX(bq27xxx_list_lock);
static LIST_HEAD(bq27xxx_battery_devices);
#define BQ27XXX_MSLEEP(i) usleep_range((i)*1000, (i)*1000+500)
#define BQ27XXX_DM_SZ 32
/**
* struct bq27xxx_dm_buf - chip data memory buffer
* @class: data memory subclass_id
* @block: data memory block number
* @data: data from/for the block
* @has_data: true if data has been filled by read
* @dirty: true if data has changed since last read/write
*
* Encapsulates info required to manage chip data memory blocks.
*/
struct bq27xxx_dm_buf {
u8 class;
u8 block;
u8 data[BQ27XXX_DM_SZ];
bool has_data, dirty;
};
#define BQ27XXX_DM_BUF(di, i) { \
.class = (di)->dm_regs[i].subclass_id, \
.block = (di)->dm_regs[i].offset / BQ27XXX_DM_SZ, \
}
static inline __be16 *bq27xxx_dm_reg_ptr(struct bq27xxx_dm_buf *buf,
struct bq27xxx_dm_reg *reg)
{
if (buf->class == reg->subclass_id &&
buf->block == reg->offset / BQ27XXX_DM_SZ)
return (__be16 *) (buf->data + reg->offset % BQ27XXX_DM_SZ);
return NULL;
}
static const char * const bq27xxx_dm_reg_name[] = {
[BQ27XXX_DM_DESIGN_CAPACITY] = "design-capacity",
[BQ27XXX_DM_DESIGN_ENERGY] = "design-energy",
[BQ27XXX_DM_TERMINATE_VOLTAGE] = "terminate-voltage",
};
static bool bq27xxx_dt_to_nvm = true;
module_param_named(dt_monitored_battery_updates_nvm, bq27xxx_dt_to_nvm, bool, 0444);
MODULE_PARM_DESC(dt_monitored_battery_updates_nvm,
"Devicetree monitored-battery config updates data memory on NVM/flash chips.\n"
"Users must set this =0 when installing a different type of battery!\n"
"Default is =1."
#ifndef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
"\nSetting this affects future kernel updates, not the current configuration."
#endif
);
static int poll_interval_param_set(const char *val, const struct kernel_param *kp)
{
struct bq27xxx_device_info *di;
unsigned int prev_val = *(unsigned int *) kp->arg;
int ret;
ret = param_set_uint(val, kp);
if (ret < 0 || prev_val == *(unsigned int *) kp->arg)
return ret;
mutex_lock(&bq27xxx_list_lock);
list_for_each_entry(di, &bq27xxx_battery_devices, list)
mod_delayed_work(system_wq, &di->work, 0);
mutex_unlock(&bq27xxx_list_lock);
return ret;
}
static const struct kernel_param_ops param_ops_poll_interval = {
.get = param_get_uint,
.set = poll_interval_param_set,
};
static unsigned int poll_interval = 360;
module_param_cb(poll_interval, ¶m_ops_poll_interval, &poll_interval, 0644);
MODULE_PARM_DESC(poll_interval,
"battery poll interval in seconds - 0 disables polling");
/*
* Common code for BQ27xxx devices
*/
static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index,
bool single)
{
int ret;
if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
return -EINVAL;
ret = di->bus.read(di, di->regs[reg_index], single);
if (ret < 0)
dev_dbg(di->dev, "failed to read register 0x%02x (index %d)\n",
di->regs[reg_index], reg_index);
return ret;
}
static inline int bq27xxx_write(struct bq27xxx_device_info *di, int reg_index,
u16 value, bool single)
{
int ret;
if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
return -EINVAL;
if (!di->bus.write)
return -EPERM;
ret = di->bus.write(di, di->regs[reg_index], value, single);
if (ret < 0)
dev_dbg(di->dev, "failed to write register 0x%02x (index %d)\n",
di->regs[reg_index], reg_index);
return ret;
}
static inline int bq27xxx_read_block(struct bq27xxx_device_info *di, int reg_index,
u8 *data, int len)
{
int ret;
if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
return -EINVAL;
if (!di->bus.read_bulk)
return -EPERM;
ret = di->bus.read_bulk(di, di->regs[reg_index], data, len);
if (ret < 0)
dev_dbg(di->dev, "failed to read_bulk register 0x%02x (index %d)\n",
di->regs[reg_index], reg_index);
return ret;
}
static inline int bq27xxx_write_block(struct bq27xxx_device_info *di, int reg_index,
u8 *data, int len)
{
int ret;
if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
return -EINVAL;
if (!di->bus.write_bulk)
return -EPERM;
ret = di->bus.write_bulk(di, di->regs[reg_index], data, len);
if (ret < 0)
dev_dbg(di->dev, "failed to write_bulk register 0x%02x (index %d)\n",
di->regs[reg_index], reg_index);
return ret;
}
static int bq27xxx_battery_seal(struct bq27xxx_device_info *di)
{
int ret;
ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_SEALED, false);
if (ret < 0) {
dev_err(di->dev, "bus error on seal: %d\n", ret);
return ret;
}
return 0;
}
static int bq27xxx_battery_unseal(struct bq27xxx_device_info *di)
{
int ret;
if (di->unseal_key == 0) {
dev_err(di->dev, "unseal failed due to missing key\n");
return -EINVAL;
}
ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)(di->unseal_key >> 16), false);
if (ret < 0)
goto out;
ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)di->unseal_key, false);
if (ret < 0)
goto out;
return 0;
out:
dev_err(di->dev, "bus error on unseal: %d\n", ret);
return ret;
}
static u8 bq27xxx_battery_checksum_dm_block(struct bq27xxx_dm_buf *buf)
{
u16 sum = 0;
int i;
for (i = 0; i < BQ27XXX_DM_SZ; i++)
sum += buf->data[i];
sum &= 0xff;
return 0xff - sum;
}
static int bq27xxx_battery_read_dm_block(struct bq27xxx_device_info *di,
struct bq27xxx_dm_buf *buf)
{
int ret;
buf->has_data = false;
ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
if (ret < 0)
goto out;
ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
if (ret < 0)
goto out;
BQ27XXX_MSLEEP(1);
ret = bq27xxx_read_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
if (ret < 0)
goto out;
ret = bq27xxx_read(di, BQ27XXX_DM_CKSUM, true);
if (ret < 0)
goto out;
if ((u8)ret != bq27xxx_battery_checksum_dm_block(buf)) {
ret = -EINVAL;
goto out;
}
buf->has_data = true;
buf->dirty = false;
return 0;
out:
dev_err(di->dev, "bus error reading chip memory: %d\n", ret);
return ret;
}
static void bq27xxx_battery_update_dm_block(struct bq27xxx_device_info *di,
struct bq27xxx_dm_buf *buf,
enum bq27xxx_dm_reg_id reg_id,
unsigned int val)
{
struct bq27xxx_dm_reg *reg = &di->dm_regs[reg_id];
const char *str = bq27xxx_dm_reg_name[reg_id];
__be16 *prev = bq27xxx_dm_reg_ptr(buf, reg);
if (prev == NULL) {
dev_warn(di->dev, "buffer does not match %s dm spec\n", str);
return;
}
if (reg->bytes != 2) {
dev_warn(di->dev, "%s dm spec has unsupported byte size\n", str);
return;
}
if (!buf->has_data)
return;
if (be16_to_cpup(prev) == val) {
dev_info(di->dev, "%s has %u\n", str, val);
return;
}
#ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
if (!(di->opts & BQ27XXX_O_RAM) && !bq27xxx_dt_to_nvm) {
#else
if (!(di->opts & BQ27XXX_O_RAM)) {
#endif
/* devicetree and NVM differ; defer to NVM */
dev_warn(di->dev, "%s has %u; update to %u disallowed "
#ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
"by dt_monitored_battery_updates_nvm=0"
#else
"for flash/NVM data memory"
#endif
"\n", str, be16_to_cpup(prev), val);
return;
}
dev_info(di->dev, "update %s to %u\n", str, val);
*prev = cpu_to_be16(val);
buf->dirty = true;
}
static int bq27xxx_battery_cfgupdate_priv(struct bq27xxx_device_info *di, bool active)
{
const int limit = 100;
u16 cmd = active ? BQ27XXX_SET_CFGUPDATE : BQ27XXX_SOFT_RESET;
int ret, try = limit;
ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, cmd, false);
if (ret < 0)
return ret;
do {
BQ27XXX_MSLEEP(25);
ret = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false);
if (ret < 0)
return ret;
} while (!!(ret & BQ27XXX_FLAG_CFGUP) != active && --try);
if (!try && di->chip != BQ27425) { // 425 has a bug
dev_err(di->dev, "timed out waiting for cfgupdate flag %d\n", active);
return -EINVAL;
}
if (limit - try > 3)
dev_warn(di->dev, "cfgupdate %d, retries %d\n", active, limit - try);
return 0;
}
static inline int bq27xxx_battery_set_cfgupdate(struct bq27xxx_device_info *di)
{
int ret = bq27xxx_battery_cfgupdate_priv(di, true);
if (ret < 0 && ret != -EINVAL)
dev_err(di->dev, "bus error on set_cfgupdate: %d\n", ret);
return ret;
}
static inline int bq27xxx_battery_soft_reset(struct bq27xxx_device_info *di)
{
int ret = bq27xxx_battery_cfgupdate_priv(di, false);
if (ret < 0 && ret != -EINVAL)
dev_err(di->dev, "bus error on soft_reset: %d\n", ret);
return ret;
}
static int bq27xxx_battery_write_dm_block(struct bq27xxx_device_info *di,
struct bq27xxx_dm_buf *buf)
{
bool cfgup = di->opts & BQ27XXX_O_CFGUP;
int ret;
if (!buf->dirty)
return 0;
if (cfgup) {
ret = bq27xxx_battery_set_cfgupdate(di);
if (ret < 0)
return ret;
}
ret = bq27xxx_write(di, BQ27XXX_DM_CTRL, 0, true);
if (ret < 0)
goto out;
ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
if (ret < 0)
goto out;
ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
if (ret < 0)
goto out;
BQ27XXX_MSLEEP(1);
ret = bq27xxx_write_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
if (ret < 0)
goto out;
ret = bq27xxx_write(di, BQ27XXX_DM_CKSUM,
bq27xxx_battery_checksum_dm_block(buf), true);
if (ret < 0)
goto out;
/* DO NOT read BQ27XXX_DM_CKSUM here to verify it! That may cause NVM
* corruption on the '425 chip (and perhaps others), which can damage
* the chip.
*/
if (cfgup) {
BQ27XXX_MSLEEP(1);
ret = bq27xxx_battery_soft_reset(di);
if (ret < 0)
return ret;
} else {
BQ27XXX_MSLEEP(100); /* flash DM updates in <100ms */
}
buf->dirty = false;
return 0;
out:
if (cfgup)
bq27xxx_battery_soft_reset(di);
dev_err(di->dev, "bus error writing chip memory: %d\n", ret);
return ret;
}
static void bq27xxx_battery_set_config(struct bq27xxx_device_info *di,
struct power_supply_battery_info *info)
{
struct bq27xxx_dm_buf bd = BQ27XXX_DM_BUF(di, BQ27XXX_DM_DESIGN_CAPACITY);
struct bq27xxx_dm_buf bt = BQ27XXX_DM_BUF(di, BQ27XXX_DM_TERMINATE_VOLTAGE);
bool updated;
if (bq27xxx_battery_unseal(di) < 0)
return;
if (info->charge_full_design_uah != -EINVAL &&
info->energy_full_design_uwh != -EINVAL) {
bq27xxx_battery_read_dm_block(di, &bd);
/* assume design energy & capacity are in same block */
bq27xxx_battery_update_dm_block(di, &bd,
BQ27XXX_DM_DESIGN_CAPACITY,
info->charge_full_design_uah / 1000);
bq27xxx_battery_update_dm_block(di, &bd,
BQ27XXX_DM_DESIGN_ENERGY,
info->energy_full_design_uwh / 1000);
}
if (info->voltage_min_design_uv != -EINVAL) {
bool same = bd.class == bt.class && bd.block == bt.block;
if (!same)
bq27xxx_battery_read_dm_block(di, &bt);
bq27xxx_battery_update_dm_block(di, same ? &bd : &bt,
BQ27XXX_DM_TERMINATE_VOLTAGE,
info->voltage_min_design_uv / 1000);
}
updated = bd.dirty || bt.dirty;
bq27xxx_battery_write_dm_block(di, &bd);
bq27xxx_battery_write_dm_block(di, &bt);
bq27xxx_battery_seal(di);
if (updated && !(di->opts & BQ27XXX_O_CFGUP)) {
bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_RESET, false);
BQ27XXX_MSLEEP(300); /* reset time is not documented */
}
/* assume bq27xxx_battery_update() is called hereafter */
}
static void bq27xxx_battery_settings(struct bq27xxx_device_info *di)
{
struct power_supply_battery_info *info;
unsigned int min, max;
if (power_supply_get_battery_info(di->bat, &info) < 0)
return;
if (!di->dm_regs) {
dev_warn(di->dev, "data memory update not supported for chip\n");
return;
}
if (info->energy_full_design_uwh != info->charge_full_design_uah) {
if (info->energy_full_design_uwh == -EINVAL)
dev_warn(di->dev, "missing battery:energy-full-design-microwatt-hours\n");
else if (info->charge_full_design_uah == -EINVAL)
dev_warn(di->dev, "missing battery:charge-full-design-microamp-hours\n");
}
/* assume min == 0 */
max = di->dm_regs[BQ27XXX_DM_DESIGN_ENERGY].max;
if (info->energy_full_design_uwh > max * 1000) {
dev_err(di->dev, "invalid battery:energy-full-design-microwatt-hours %d\n",
info->energy_full_design_uwh);
info->energy_full_design_uwh = -EINVAL;
}
/* assume min == 0 */
max = di->dm_regs[BQ27XXX_DM_DESIGN_CAPACITY].max;
if (info->charge_full_design_uah > max * 1000) {
dev_err(di->dev, "invalid battery:charge-full-design-microamp-hours %d\n",
info->charge_full_design_uah);
info->charge_full_design_uah = -EINVAL;
}
min = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].min;
max = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].max;
if ((info->voltage_min_design_uv < min * 1000 ||
info->voltage_min_design_uv > max * 1000) &&
info->voltage_min_design_uv != -EINVAL) {
dev_err(di->dev, "invalid battery:voltage-min-design-microvolt %d\n",
info->voltage_min_design_uv);
info->voltage_min_design_uv = -EINVAL;
}
if ((info->energy_full_design_uwh != -EINVAL &&
info->charge_full_design_uah != -EINVAL) ||
info->voltage_min_design_uv != -EINVAL)
bq27xxx_battery_set_config(di, info);
}
/*
* Return the battery State-of-Charge
* Or < 0 if something fails.
*/
static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
{
int soc;
if (di->opts & BQ27XXX_O_SOC_SI)
soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true);
else
soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);
if (soc < 0)
dev_dbg(di->dev, "error reading State-of-Charge\n");
return soc;
}
/*
* Return a battery charge value in µAh
* Or < 0 if something fails.
*/
static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
{
int charge;
charge = bq27xxx_read(di, reg, false);
if (charge < 0) {
dev_dbg(di->dev, "error reading charge register %02x: %d\n",
reg, charge);
return charge;
}
if (di->opts & BQ27XXX_O_ZERO)
charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
else
charge *= 1000;
return charge;
}
/*
* Return the battery Nominal available capacity in µAh
* Or < 0 if something fails.
*/
static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
{
return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
}
/*
* Return the battery Remaining Capacity in µAh
* Or < 0 if something fails.
*/
static inline int bq27xxx_battery_read_rc(struct bq27xxx_device_info *di)
{
return bq27xxx_battery_read_charge(di, BQ27XXX_REG_RC);
}
/*
* Return the battery Full Charge Capacity in µAh
* Or < 0 if something fails.
*/
static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di)
{
return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC);
}
/*
* Return the Design Capacity in µAh
* Or < 0 if something fails.
*/
static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di)
{
int dcap;
if (di->opts & BQ27XXX_O_ZERO)
dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true);
else
dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false);
if (dcap < 0) {
dev_dbg(di->dev, "error reading initial last measured discharge\n");
return dcap;
}
if (di->opts & BQ27XXX_O_ZERO)
dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
else
dcap *= 1000;
return dcap;
}
/*
* Return the battery Available energy in µWh
* Or < 0 if something fails.
*/
static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di)
{
int ae;
ae = bq27xxx_read(di, BQ27XXX_REG_AE, false);
if (ae < 0) {
dev_dbg(di->dev, "error reading available energy\n");
return ae;
}
if (di->opts & BQ27XXX_O_ZERO)
ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS;
else
ae *= 1000;
return ae;
}
/*
* Return the battery temperature in tenths of degree Kelvin
* Or < 0 if something fails.
*/
static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di)
{
int temp;
temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false);
if (temp < 0) {
dev_err(di->dev, "error reading temperature\n");
return temp;
}
if (di->opts & BQ27XXX_O_ZERO)
temp = 5 * temp / 2;
return temp;
}
/*
* Return the battery Cycle count total
* Or < 0 if something fails.
*/
static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di)
{
int cyct;
cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false);
if (cyct < 0)
dev_err(di->dev, "error reading cycle count total\n");
return cyct;
}
/*
* Read a time register.
* Return < 0 if something fails.
*/
static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
{
int tval;
tval = bq27xxx_read(di, reg, false);
if (tval < 0) {
dev_dbg(di->dev, "error reading time register %02x: %d\n",
reg, tval);
return tval;
}
if (tval == 65535)
return -ENODATA;
return tval * 60;
}
/*
* Returns true if a battery over temperature condition is detected
*/
static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags)
{
if (di->opts & BQ27XXX_O_OTDC)
return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD);
if (di->opts & BQ27XXX_O_UTOT)
return flags & BQ27XXX_FLAG_OT;
return false;
}
/*
* Returns true if a battery under temperature condition is detected
*/
static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags)
{
if (di->opts & BQ27XXX_O_UTOT)
return flags & BQ27XXX_FLAG_UT;
return false;
}
/*
* Returns true if a low state of charge condition is detected
*/
static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
{
if (di->opts & BQ27XXX_O_ZERO)
return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF);
else if (di->opts & BQ27Z561_O_BITS)
return flags & BQ27Z561_FLAG_FDC;
else
return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF);
}
/*
* Returns true if reported battery capacity is inaccurate
*/
static bool bq27xxx_battery_capacity_inaccurate(struct bq27xxx_device_info *di,
u16 flags)
{
if (di->opts & BQ27XXX_O_HAS_CI)
return (flags & BQ27000_FLAG_CI);
else
return false;
}
static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
{
/* Unlikely but important to return first */
if (unlikely(bq27xxx_battery_overtemp(di, di->cache.flags)))
return POWER_SUPPLY_HEALTH_OVERHEAT;
if (unlikely(bq27xxx_battery_undertemp(di, di->cache.flags)))
return POWER_SUPPLY_HEALTH_COLD;
if (unlikely(bq27xxx_battery_dead(di, di->cache.flags)))
return POWER_SUPPLY_HEALTH_DEAD;
if (unlikely(bq27xxx_battery_capacity_inaccurate(di, di->cache.flags)))
return POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED;
return POWER_SUPPLY_HEALTH_GOOD;
}
static bool bq27xxx_battery_is_full(struct bq27xxx_device_info *di, int flags)
{
if (di->opts & BQ27XXX_O_ZERO)
return (flags & BQ27000_FLAG_FC);
else if (di->opts & BQ27Z561_O_BITS)
return (flags & BQ27Z561_FLAG_FC);
else
return (flags & BQ27XXX_FLAG_FC);
}
/*
* Return the battery average current in µA and the status
* Note that current can be negative signed as well
* Or 0 if something fails.
*/
static int bq27xxx_battery_current_and_status(
struct bq27xxx_device_info *di,
union power_supply_propval *val_curr,
union power_supply_propval *val_status,
struct bq27xxx_reg_cache *cache)
{
bool single_flags = (di->opts & BQ27XXX_O_ZERO);
int curr;
int flags;
curr = bq27xxx_read(di, BQ27XXX_REG_AI, false);
if (curr < 0) {
dev_err(di->dev, "error reading current\n");
return curr;
}
if (cache) {
flags = cache->flags;
} else {
flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, single_flags);
if (flags < 0) {
dev_err(di->dev, "error reading flags\n");
return flags;
}
}
if (di->opts & BQ27XXX_O_ZERO) {
if (!(flags & BQ27000_FLAG_CHGS)) {
dev_dbg(di->dev, "negative current!\n");
curr = -curr;
}
curr = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
} else {
/* Other gauges return signed value */
curr = (int)((s16)curr) * 1000;
}
if (val_curr)
val_curr->intval = curr;
if (val_status) {
if (curr > 0) {
val_status->intval = POWER_SUPPLY_STATUS_CHARGING;
} else if (curr < 0) {
val_status->intval = POWER_SUPPLY_STATUS_DISCHARGING;
} else {
if (bq27xxx_battery_is_full(di, flags))
val_status->intval = POWER_SUPPLY_STATUS_FULL;
else
val_status->intval =
POWER_SUPPLY_STATUS_NOT_CHARGING;
}
}
return 0;
}
static void bq27xxx_battery_update_unlocked(struct bq27xxx_device_info *di)
{
union power_supply_propval status = di->last_status;
struct bq27xxx_reg_cache cache = {0, };
bool has_singe_flag = di->opts & BQ27XXX_O_ZERO;
cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
if ((cache.flags & 0xff) == 0xff)
cache.flags = -1; /* read error */
if (cache.flags >= 0) {
cache.temperature = bq27xxx_battery_read_temperature(di);
if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
cache.charge_full = bq27xxx_battery_read_fcc(di);
cache.capacity = bq27xxx_battery_read_soc(di);
if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
cache.energy = bq27xxx_battery_read_energy(di);
di->cache.flags = cache.flags;
cache.health = bq27xxx_battery_read_health(di);
if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
cache.cycle_count = bq27xxx_battery_read_cyct(di);
/*
* On gauges with signed current reporting the current must be
* checked to detect charging <-> discharging status changes.
*/
if (!(di->opts & BQ27XXX_O_ZERO))
bq27xxx_battery_current_and_status(di, NULL, &status, &cache);
/* We only have to read charge design full once */
if (di->charge_design_full <= 0)
di->charge_design_full = bq27xxx_battery_read_dcap(di);
}
if ((di->cache.capacity != cache.capacity) ||
(di->cache.flags != cache.flags) ||
(di->last_status.intval != status.intval)) {
di->last_status.intval = status.intval;
power_supply_changed(di->bat);
}
if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
di->cache = cache;
di->last_update = jiffies;
if (!di->removed && poll_interval > 0)
mod_delayed_work(system_wq, &di->work, poll_interval * HZ);
}
void bq27xxx_battery_update(struct bq27xxx_device_info *di)
{
mutex_lock(&di->lock);
bq27xxx_battery_update_unlocked(di);
mutex_unlock(&di->lock);
}
EXPORT_SYMBOL_GPL(bq27xxx_battery_update);
static void bq27xxx_battery_poll(struct work_struct *work)
{
struct bq27xxx_device_info *di =
container_of(work, struct bq27xxx_device_info,
work.work);
bq27xxx_battery_update(di);
}
/*
* Get the average power in µW
* Return < 0 if something fails.
*/
static int bq27xxx_battery_pwr_avg(struct bq27xxx_device_info *di,
union power_supply_propval *val)
{
int power;
power = bq27xxx_read(di, BQ27XXX_REG_AP, false);
if (power < 0) {
dev_err(di->dev,
"error reading average power register %02x: %d\n",
BQ27XXX_REG_AP, power);
return power;
}
if (di->opts & BQ27XXX_O_ZERO)
val->intval = (power * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;
else
/* Other gauges return a signed value in units of 10mW */
val->intval = (int)((s16)power) * 10000;
return 0;
}
static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
union power_supply_propval *val)
{
int level;
if (di->opts & BQ27XXX_O_ZERO) {
if (di->cache.flags & BQ27000_FLAG_FC)
level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
else if (di->cache.flags & BQ27000_FLAG_EDVF)
level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
else if (di->cache.flags & BQ27000_FLAG_EDV1)
level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
else
level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
} else if (di->opts & BQ27Z561_O_BITS) {
if (di->cache.flags & BQ27Z561_FLAG_FC)
level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
else if (di->cache.flags & BQ27Z561_FLAG_FDC)
level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
else
level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
} else {
if (di->cache.flags & BQ27XXX_FLAG_FC)
level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
else
level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
}
val->intval = level;
return 0;
}
/*
* Return the battery Voltage in millivolts
* Or < 0 if something fails.
*/
static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di,
union power_supply_propval *val)
{
int volt;
volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false);
if (volt < 0) {
dev_err(di->dev, "error reading voltage\n");
return volt;
}
val->intval = volt * 1000;
return 0;
}
static int bq27xxx_simple_value(int value,
union power_supply_propval *val)
{
if (value < 0)
return value;
val->intval = value;
return 0;
}
static int bq27xxx_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
int ret = 0;
struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
mutex_lock(&di->lock);
if (time_is_before_jiffies(di->last_update + 5 * HZ))
bq27xxx_battery_update_unlocked(di);
mutex_unlock(&di->lock);
if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
return -ENODEV;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
ret = bq27xxx_battery_current_and_status(di, NULL, val, NULL);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = bq27xxx_battery_voltage(di, val);
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = di->cache.flags < 0 ? 0 : 1;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = bq27xxx_battery_current_and_status(di, val, NULL, NULL);
break;
case POWER_SUPPLY_PROP_CAPACITY:
ret = bq27xxx_simple_value(di->cache.capacity, val);
break;
case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
ret = bq27xxx_battery_capacity_level(di, val);
break;
case POWER_SUPPLY_PROP_TEMP:
ret = bq27xxx_simple_value(di->cache.temperature, val);
if (ret == 0)
val->intval -= 2731; /* convert decidegree k to c */
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
break;
case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
ret = bq27xxx_simple_value(di->cache.time_to_full, val);
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
if (di->opts & BQ27XXX_O_MUL_CHEM)
val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
else
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
if (di->regs[BQ27XXX_REG_NAC] != INVALID_REG_ADDR)
ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
else
ret = bq27xxx_simple_value(bq27xxx_battery_read_rc(di), val);
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
ret = bq27xxx_simple_value(di->cache.charge_full, val);
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
ret = bq27xxx_simple_value(di->charge_design_full, val);
break;
/*
* TODO: Implement these to make registers set from
* power_supply_battery_info visible in sysfs.
*/
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
return -EINVAL;
case POWER_SUPPLY_PROP_CYCLE_COUNT:
ret = bq27xxx_simple_value(di->cache.cycle_count, val);
break;
case POWER_SUPPLY_PROP_ENERGY_NOW:
ret = bq27xxx_simple_value(di->cache.energy, val);
break;
case POWER_SUPPLY_PROP_POWER_AVG:
ret = bq27xxx_battery_pwr_avg(di, val);
break;
case POWER_SUPPLY_PROP_HEALTH:
ret = bq27xxx_simple_value(di->cache.health, val);
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = BQ27XXX_MANUFACTURER;
break;
default:
return -EINVAL;
}
return ret;
}
static void bq27xxx_external_power_changed(struct power_supply *psy)
{
struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
/* After charger plug in/out wait 0.5s for things to stabilize */
mod_delayed_work(system_wq, &di->work, HZ / 2);
}
int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
{
struct power_supply_desc *psy_desc;
struct power_supply_config psy_cfg = {
.of_node = di->dev->of_node,
.drv_data = di,
};
INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
mutex_init(&di->lock);
di->regs = bq27xxx_chip_data[di->chip].regs;
di->unseal_key = bq27xxx_chip_data[di->chip].unseal_key;
di->dm_regs = bq27xxx_chip_data[di->chip].dm_regs;
di->opts = bq27xxx_chip_data[di->chip].opts;
psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
if (!psy_desc)
return -ENOMEM;
psy_desc->name = di->name;
psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
psy_desc->properties = bq27xxx_chip_data[di->chip].props;
psy_desc->num_properties = bq27xxx_chip_data[di->chip].props_size;
psy_desc->get_property = bq27xxx_battery_get_property;
psy_desc->external_power_changed = bq27xxx_external_power_changed;
di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
if (IS_ERR(di->bat))
return dev_err_probe(di->dev, PTR_ERR(di->bat),
"failed to register battery\n");
bq27xxx_battery_settings(di);
bq27xxx_battery_update(di);
mutex_lock(&bq27xxx_list_lock);
list_add(&di->list, &bq27xxx_battery_devices);
mutex_unlock(&bq27xxx_list_lock);
return 0;
}
EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
{
mutex_lock(&bq27xxx_list_lock);
list_del(&di->list);
mutex_unlock(&bq27xxx_list_lock);
/* Set removed to avoid bq27xxx_battery_update() re-queuing the work */
mutex_lock(&di->lock);
di->removed = true;
mutex_unlock(&di->lock);
cancel_delayed_work_sync(&di->work);
power_supply_unregister(di->bat);
mutex_destroy(&di->lock);
}
EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
MODULE_AUTHOR("Rodolfo Giometti <[email protected]>");
MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/bq27xxx_battery.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* DA9150 Charger Driver
*
* Copyright (c) 2014 Dialog Semiconductor
*
* Author: Adam Thomson <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/power_supply.h>
#include <linux/notifier.h>
#include <linux/usb/phy.h>
#include <linux/iio/consumer.h>
#include <linux/mfd/da9150/core.h>
#include <linux/mfd/da9150/registers.h>
/* Private data */
struct da9150_charger {
struct da9150 *da9150;
struct device *dev;
struct power_supply *usb;
struct power_supply *battery;
struct power_supply *supply_online;
struct usb_phy *usb_phy;
struct notifier_block otg_nb;
struct work_struct otg_work;
unsigned long usb_event;
struct iio_channel *ibus_chan;
struct iio_channel *vbus_chan;
struct iio_channel *tjunc_chan;
struct iio_channel *vbat_chan;
};
static inline int da9150_charger_supply_online(struct da9150_charger *charger,
struct power_supply *psy,
union power_supply_propval *val)
{
val->intval = (psy == charger->supply_online) ? 1 : 0;
return 0;
}
/* Charger Properties */
static int da9150_charger_vbus_voltage_now(struct da9150_charger *charger,
union power_supply_propval *val)
{
int v_val, ret;
/* Read processed value - mV units */
ret = iio_read_channel_processed(charger->vbus_chan, &v_val);
if (ret < 0)
return ret;
/* Convert voltage to expected uV units */
val->intval = v_val * 1000;
return 0;
}
static int da9150_charger_ibus_current_avg(struct da9150_charger *charger,
union power_supply_propval *val)
{
int i_val, ret;
/* Read processed value - mA units */
ret = iio_read_channel_processed(charger->ibus_chan, &i_val);
if (ret < 0)
return ret;
/* Convert current to expected uA units */
val->intval = i_val * 1000;
return 0;
}
static int da9150_charger_tjunc_temp(struct da9150_charger *charger,
union power_supply_propval *val)
{
int t_val, ret;
/* Read processed value - 0.001 degrees C units */
ret = iio_read_channel_processed(charger->tjunc_chan, &t_val);
if (ret < 0)
return ret;
/* Convert temp to expect 0.1 degrees C units */
val->intval = t_val / 100;
return 0;
}
static enum power_supply_property da9150_charger_props[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_TEMP,
};
static int da9150_charger_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
ret = da9150_charger_supply_online(charger, psy, val);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = da9150_charger_vbus_voltage_now(charger, val);
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
ret = da9150_charger_ibus_current_avg(charger, val);
break;
case POWER_SUPPLY_PROP_TEMP:
ret = da9150_charger_tjunc_temp(charger, val);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
/* Battery Properties */
static int da9150_charger_battery_status(struct da9150_charger *charger,
union power_supply_propval *val)
{
u8 reg;
/* Check to see if battery is discharging */
reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
if (((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_OFF) ||
((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_WAIT)) {
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
return 0;
}
reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
/* Now check for other states */
switch (reg & DA9150_CHG_STAT_MASK) {
case DA9150_CHG_STAT_ACT:
case DA9150_CHG_STAT_PRE:
case DA9150_CHG_STAT_CC:
case DA9150_CHG_STAT_CV:
val->intval = POWER_SUPPLY_STATUS_CHARGING;
break;
case DA9150_CHG_STAT_OFF:
case DA9150_CHG_STAT_SUSP:
case DA9150_CHG_STAT_TEMP:
case DA9150_CHG_STAT_TIME:
case DA9150_CHG_STAT_BAT:
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case DA9150_CHG_STAT_FULL:
val->intval = POWER_SUPPLY_STATUS_FULL;
break;
default:
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
break;
}
return 0;
}
static int da9150_charger_battery_health(struct da9150_charger *charger,
union power_supply_propval *val)
{
u8 reg;
reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
/* Check if temperature limit reached */
switch (reg & DA9150_CHG_TEMP_MASK) {
case DA9150_CHG_TEMP_UNDER:
val->intval = POWER_SUPPLY_HEALTH_COLD;
return 0;
case DA9150_CHG_TEMP_OVER:
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
return 0;
default:
break;
}
/* Check for other health states */
switch (reg & DA9150_CHG_STAT_MASK) {
case DA9150_CHG_STAT_ACT:
case DA9150_CHG_STAT_PRE:
val->intval = POWER_SUPPLY_HEALTH_DEAD;
break;
case DA9150_CHG_STAT_TIME:
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
break;
default:
val->intval = POWER_SUPPLY_HEALTH_GOOD;
break;
}
return 0;
}
static int da9150_charger_battery_present(struct da9150_charger *charger,
union power_supply_propval *val)
{
u8 reg;
/* Check if battery present or removed */
reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
if ((reg & DA9150_CHG_STAT_MASK) == DA9150_CHG_STAT_BAT)
val->intval = 0;
else
val->intval = 1;
return 0;
}
static int da9150_charger_battery_charge_type(struct da9150_charger *charger,
union power_supply_propval *val)
{
u8 reg;
reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
switch (reg & DA9150_CHG_STAT_MASK) {
case DA9150_CHG_STAT_CC:
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
case DA9150_CHG_STAT_ACT:
case DA9150_CHG_STAT_PRE:
case DA9150_CHG_STAT_CV:
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
default:
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
}
return 0;
}
static int da9150_charger_battery_voltage_min(struct da9150_charger *charger,
union power_supply_propval *val)
{
u8 reg;
reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_C);
/* Value starts at 2500 mV, 50 mV increments, presented in uV */
val->intval = ((reg & DA9150_CHG_VFAULT_MASK) * 50000) + 2500000;
return 0;
}
static int da9150_charger_battery_voltage_now(struct da9150_charger *charger,
union power_supply_propval *val)
{
int v_val, ret;
/* Read processed value - mV units */
ret = iio_read_channel_processed(charger->vbat_chan, &v_val);
if (ret < 0)
return ret;
val->intval = v_val * 1000;
return 0;
}
static int da9150_charger_battery_current_max(struct da9150_charger *charger,
union power_supply_propval *val)
{
int reg;
reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_D);
/* 25mA increments */
val->intval = reg * 25000;
return 0;
}
static int da9150_charger_battery_voltage_max(struct da9150_charger *charger,
union power_supply_propval *val)
{
u8 reg;
reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_B);
/* Value starts at 3650 mV, 25 mV increments, presented in uV */
val->intval = ((reg & DA9150_CHG_VBAT_MASK) * 25000) + 3650000;
return 0;
}
static enum power_supply_property da9150_charger_bat_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
};
static int da9150_charger_battery_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
ret = da9150_charger_battery_status(charger, val);
break;
case POWER_SUPPLY_PROP_ONLINE:
ret = da9150_charger_supply_online(charger, psy, val);
break;
case POWER_SUPPLY_PROP_HEALTH:
ret = da9150_charger_battery_health(charger, val);
break;
case POWER_SUPPLY_PROP_PRESENT:
ret = da9150_charger_battery_present(charger, val);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
ret = da9150_charger_battery_charge_type(charger, val);
break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
ret = da9150_charger_battery_voltage_min(charger, val);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = da9150_charger_battery_voltage_now(charger, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
ret = da9150_charger_battery_current_max(charger, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
ret = da9150_charger_battery_voltage_max(charger, val);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static irqreturn_t da9150_charger_chg_irq(int irq, void *data)
{
struct da9150_charger *charger = data;
power_supply_changed(charger->battery);
return IRQ_HANDLED;
}
static irqreturn_t da9150_charger_tjunc_irq(int irq, void *data)
{
struct da9150_charger *charger = data;
/* Nothing we can really do except report this. */
dev_crit(charger->dev, "TJunc over temperature!!!\n");
power_supply_changed(charger->usb);
return IRQ_HANDLED;
}
static irqreturn_t da9150_charger_vfault_irq(int irq, void *data)
{
struct da9150_charger *charger = data;
/* Nothing we can really do except report this. */
dev_crit(charger->dev, "VSYS under voltage!!!\n");
power_supply_changed(charger->usb);
power_supply_changed(charger->battery);
return IRQ_HANDLED;
}
static irqreturn_t da9150_charger_vbus_irq(int irq, void *data)
{
struct da9150_charger *charger = data;
u8 reg;
reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
/* Charger plugged in or battery only */
switch (reg & DA9150_VBUS_STAT_MASK) {
case DA9150_VBUS_STAT_OFF:
case DA9150_VBUS_STAT_WAIT:
charger->supply_online = charger->battery;
break;
case DA9150_VBUS_STAT_CHG:
charger->supply_online = charger->usb;
break;
default:
dev_warn(charger->dev, "Unknown VBUS state - reg = 0x%x\n",
reg);
charger->supply_online = NULL;
break;
}
power_supply_changed(charger->usb);
power_supply_changed(charger->battery);
return IRQ_HANDLED;
}
static void da9150_charger_otg_work(struct work_struct *data)
{
struct da9150_charger *charger =
container_of(data, struct da9150_charger, otg_work);
switch (charger->usb_event) {
case USB_EVENT_ID:
/* Enable OTG Boost */
da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_OTG);
break;
case USB_EVENT_NONE:
/* Revert to charge mode */
power_supply_changed(charger->usb);
power_supply_changed(charger->battery);
da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_CHG);
break;
}
}
static int da9150_charger_otg_ncb(struct notifier_block *nb, unsigned long val,
void *priv)
{
struct da9150_charger *charger =
container_of(nb, struct da9150_charger, otg_nb);
dev_dbg(charger->dev, "DA9150 OTG notify %lu\n", val);
charger->usb_event = val;
schedule_work(&charger->otg_work);
return NOTIFY_OK;
}
static int da9150_charger_register_irq(struct platform_device *pdev,
irq_handler_t handler,
const char *irq_name)
{
struct device *dev = &pdev->dev;
struct da9150_charger *charger = platform_get_drvdata(pdev);
int irq, ret;
irq = platform_get_irq_byname(pdev, irq_name);
if (irq < 0)
return irq;
ret = request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, irq_name,
charger);
if (ret)
dev_err(dev, "Failed to request IRQ %d: %d\n", irq, ret);
return ret;
}
static void da9150_charger_unregister_irq(struct platform_device *pdev,
const char *irq_name)
{
struct da9150_charger *charger = platform_get_drvdata(pdev);
int irq;
irq = platform_get_irq_byname(pdev, irq_name);
if (irq < 0)
return;
free_irq(irq, charger);
}
static const struct power_supply_desc usb_desc = {
.name = "da9150-usb",
.type = POWER_SUPPLY_TYPE_USB,
.properties = da9150_charger_props,
.num_properties = ARRAY_SIZE(da9150_charger_props),
.get_property = da9150_charger_get_prop,
};
static const struct power_supply_desc battery_desc = {
.name = "da9150-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = da9150_charger_bat_props,
.num_properties = ARRAY_SIZE(da9150_charger_bat_props),
.get_property = da9150_charger_battery_get_prop,
};
static int da9150_charger_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct da9150 *da9150 = dev_get_drvdata(dev->parent);
struct da9150_charger *charger;
u8 reg;
int ret;
charger = devm_kzalloc(dev, sizeof(struct da9150_charger), GFP_KERNEL);
if (!charger)
return -ENOMEM;
platform_set_drvdata(pdev, charger);
charger->da9150 = da9150;
charger->dev = dev;
/* Acquire ADC channels */
charger->ibus_chan = iio_channel_get(dev, "CHAN_IBUS");
if (IS_ERR(charger->ibus_chan)) {
ret = PTR_ERR(charger->ibus_chan);
goto ibus_chan_fail;
}
charger->vbus_chan = iio_channel_get(dev, "CHAN_VBUS");
if (IS_ERR(charger->vbus_chan)) {
ret = PTR_ERR(charger->vbus_chan);
goto vbus_chan_fail;
}
charger->tjunc_chan = iio_channel_get(dev, "CHAN_TJUNC");
if (IS_ERR(charger->tjunc_chan)) {
ret = PTR_ERR(charger->tjunc_chan);
goto tjunc_chan_fail;
}
charger->vbat_chan = iio_channel_get(dev, "CHAN_VBAT");
if (IS_ERR(charger->vbat_chan)) {
ret = PTR_ERR(charger->vbat_chan);
goto vbat_chan_fail;
}
/* Register power supplies */
charger->usb = power_supply_register(dev, &usb_desc, NULL);
if (IS_ERR(charger->usb)) {
ret = PTR_ERR(charger->usb);
goto usb_fail;
}
charger->battery = power_supply_register(dev, &battery_desc, NULL);
if (IS_ERR(charger->battery)) {
ret = PTR_ERR(charger->battery);
goto battery_fail;
}
/* Get initial online supply */
reg = da9150_reg_read(da9150, DA9150_STATUS_H);
switch (reg & DA9150_VBUS_STAT_MASK) {
case DA9150_VBUS_STAT_OFF:
case DA9150_VBUS_STAT_WAIT:
charger->supply_online = charger->battery;
break;
case DA9150_VBUS_STAT_CHG:
charger->supply_online = charger->usb;
break;
default:
dev_warn(dev, "Unknown VBUS state - reg = 0x%x\n", reg);
charger->supply_online = NULL;
break;
}
/* Setup OTG reporting & configuration */
charger->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
if (!IS_ERR_OR_NULL(charger->usb_phy)) {
INIT_WORK(&charger->otg_work, da9150_charger_otg_work);
charger->otg_nb.notifier_call = da9150_charger_otg_ncb;
usb_register_notifier(charger->usb_phy, &charger->otg_nb);
}
/* Register IRQs */
ret = da9150_charger_register_irq(pdev, da9150_charger_chg_irq,
"CHG_STATUS");
if (ret < 0)
goto chg_irq_fail;
ret = da9150_charger_register_irq(pdev, da9150_charger_tjunc_irq,
"CHG_TJUNC");
if (ret < 0)
goto tjunc_irq_fail;
ret = da9150_charger_register_irq(pdev, da9150_charger_vfault_irq,
"CHG_VFAULT");
if (ret < 0)
goto vfault_irq_fail;
ret = da9150_charger_register_irq(pdev, da9150_charger_vbus_irq,
"CHG_VBUS");
if (ret < 0)
goto vbus_irq_fail;
return 0;
vbus_irq_fail:
da9150_charger_unregister_irq(pdev, "CHG_VFAULT");
vfault_irq_fail:
da9150_charger_unregister_irq(pdev, "CHG_TJUNC");
tjunc_irq_fail:
da9150_charger_unregister_irq(pdev, "CHG_STATUS");
chg_irq_fail:
if (!IS_ERR_OR_NULL(charger->usb_phy))
usb_unregister_notifier(charger->usb_phy, &charger->otg_nb);
battery_fail:
power_supply_unregister(charger->usb);
usb_fail:
iio_channel_release(charger->vbat_chan);
vbat_chan_fail:
iio_channel_release(charger->tjunc_chan);
tjunc_chan_fail:
iio_channel_release(charger->vbus_chan);
vbus_chan_fail:
iio_channel_release(charger->ibus_chan);
ibus_chan_fail:
return ret;
}
static int da9150_charger_remove(struct platform_device *pdev)
{
struct da9150_charger *charger = platform_get_drvdata(pdev);
int irq;
/* Make sure IRQs are released before unregistering power supplies */
irq = platform_get_irq_byname(pdev, "CHG_VBUS");
free_irq(irq, charger);
irq = platform_get_irq_byname(pdev, "CHG_VFAULT");
free_irq(irq, charger);
irq = platform_get_irq_byname(pdev, "CHG_TJUNC");
free_irq(irq, charger);
irq = platform_get_irq_byname(pdev, "CHG_STATUS");
free_irq(irq, charger);
if (!IS_ERR_OR_NULL(charger->usb_phy))
usb_unregister_notifier(charger->usb_phy, &charger->otg_nb);
cancel_work_sync(&charger->otg_work);
power_supply_unregister(charger->battery);
power_supply_unregister(charger->usb);
/* Release ADC channels */
iio_channel_release(charger->ibus_chan);
iio_channel_release(charger->vbus_chan);
iio_channel_release(charger->tjunc_chan);
iio_channel_release(charger->vbat_chan);
return 0;
}
static struct platform_driver da9150_charger_driver = {
.driver = {
.name = "da9150-charger",
},
.probe = da9150_charger_probe,
.remove = da9150_charger_remove,
};
module_platform_driver(da9150_charger_driver);
MODULE_DESCRIPTION("Charger Driver for DA9150");
MODULE_AUTHOR("Adam Thomson <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/da9150-charger.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for the TI bq24190 battery charger.
*
* Author: Mark A. Greer <[email protected]>
*/
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/pm_runtime.h>
#include <linux/power_supply.h>
#include <linux/power/bq24190_charger.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/workqueue.h>
#include <linux/i2c.h>
#include <linux/extcon-provider.h>
#define BQ24190_MANUFACTURER "Texas Instruments"
#define BQ24190_REG_ISC 0x00 /* Input Source Control */
#define BQ24190_REG_ISC_EN_HIZ_MASK BIT(7)
#define BQ24190_REG_ISC_EN_HIZ_SHIFT 7
#define BQ24190_REG_ISC_VINDPM_MASK (BIT(6) | BIT(5) | BIT(4) | \
BIT(3))
#define BQ24190_REG_ISC_VINDPM_SHIFT 3
#define BQ24190_REG_ISC_IINLIM_MASK (BIT(2) | BIT(1) | BIT(0))
#define BQ24190_REG_ISC_IINLIM_SHIFT 0
#define BQ24190_REG_POC 0x01 /* Power-On Configuration */
#define BQ24190_REG_POC_RESET_MASK BIT(7)
#define BQ24190_REG_POC_RESET_SHIFT 7
#define BQ24190_REG_POC_WDT_RESET_MASK BIT(6)
#define BQ24190_REG_POC_WDT_RESET_SHIFT 6
#define BQ24190_REG_POC_CHG_CONFIG_MASK (BIT(5) | BIT(4))
#define BQ24190_REG_POC_CHG_CONFIG_SHIFT 4
#define BQ24190_REG_POC_CHG_CONFIG_DISABLE 0x0
#define BQ24190_REG_POC_CHG_CONFIG_CHARGE 0x1
#define BQ24190_REG_POC_CHG_CONFIG_OTG 0x2
#define BQ24190_REG_POC_CHG_CONFIG_OTG_ALT 0x3
#define BQ24190_REG_POC_SYS_MIN_MASK (BIT(3) | BIT(2) | BIT(1))
#define BQ24190_REG_POC_SYS_MIN_SHIFT 1
#define BQ24190_REG_POC_SYS_MIN_MIN 3000
#define BQ24190_REG_POC_SYS_MIN_MAX 3700
#define BQ24190_REG_POC_BOOST_LIM_MASK BIT(0)
#define BQ24190_REG_POC_BOOST_LIM_SHIFT 0
#define BQ24190_REG_CCC 0x02 /* Charge Current Control */
#define BQ24190_REG_CCC_ICHG_MASK (BIT(7) | BIT(6) | BIT(5) | \
BIT(4) | BIT(3) | BIT(2))
#define BQ24190_REG_CCC_ICHG_SHIFT 2
#define BQ24190_REG_CCC_FORCE_20PCT_MASK BIT(0)
#define BQ24190_REG_CCC_FORCE_20PCT_SHIFT 0
#define BQ24190_REG_PCTCC 0x03 /* Pre-charge/Termination Current Cntl */
#define BQ24190_REG_PCTCC_IPRECHG_MASK (BIT(7) | BIT(6) | BIT(5) | \
BIT(4))
#define BQ24190_REG_PCTCC_IPRECHG_SHIFT 4
#define BQ24190_REG_PCTCC_IPRECHG_MIN 128
#define BQ24190_REG_PCTCC_IPRECHG_MAX 2048
#define BQ24190_REG_PCTCC_ITERM_MASK (BIT(3) | BIT(2) | BIT(1) | \
BIT(0))
#define BQ24190_REG_PCTCC_ITERM_SHIFT 0
#define BQ24190_REG_PCTCC_ITERM_MIN 128
#define BQ24190_REG_PCTCC_ITERM_MAX 2048
#define BQ24190_REG_CVC 0x04 /* Charge Voltage Control */
#define BQ24190_REG_CVC_VREG_MASK (BIT(7) | BIT(6) | BIT(5) | \
BIT(4) | BIT(3) | BIT(2))
#define BQ24190_REG_CVC_VREG_SHIFT 2
#define BQ24190_REG_CVC_BATLOWV_MASK BIT(1)
#define BQ24190_REG_CVC_BATLOWV_SHIFT 1
#define BQ24190_REG_CVC_VRECHG_MASK BIT(0)
#define BQ24190_REG_CVC_VRECHG_SHIFT 0
#define BQ24190_REG_CTTC 0x05 /* Charge Term/Timer Control */
#define BQ24190_REG_CTTC_EN_TERM_MASK BIT(7)
#define BQ24190_REG_CTTC_EN_TERM_SHIFT 7
#define BQ24190_REG_CTTC_TERM_STAT_MASK BIT(6)
#define BQ24190_REG_CTTC_TERM_STAT_SHIFT 6
#define BQ24190_REG_CTTC_WATCHDOG_MASK (BIT(5) | BIT(4))
#define BQ24190_REG_CTTC_WATCHDOG_SHIFT 4
#define BQ24190_REG_CTTC_EN_TIMER_MASK BIT(3)
#define BQ24190_REG_CTTC_EN_TIMER_SHIFT 3
#define BQ24190_REG_CTTC_CHG_TIMER_MASK (BIT(2) | BIT(1))
#define BQ24190_REG_CTTC_CHG_TIMER_SHIFT 1
#define BQ24190_REG_CTTC_JEITA_ISET_MASK BIT(0)
#define BQ24190_REG_CTTC_JEITA_ISET_SHIFT 0
#define BQ24190_REG_ICTRC 0x06 /* IR Comp/Thermal Regulation Control */
#define BQ24190_REG_ICTRC_BAT_COMP_MASK (BIT(7) | BIT(6) | BIT(5))
#define BQ24190_REG_ICTRC_BAT_COMP_SHIFT 5
#define BQ24190_REG_ICTRC_VCLAMP_MASK (BIT(4) | BIT(3) | BIT(2))
#define BQ24190_REG_ICTRC_VCLAMP_SHIFT 2
#define BQ24190_REG_ICTRC_TREG_MASK (BIT(1) | BIT(0))
#define BQ24190_REG_ICTRC_TREG_SHIFT 0
#define BQ24190_REG_MOC 0x07 /* Misc. Operation Control */
#define BQ24190_REG_MOC_DPDM_EN_MASK BIT(7)
#define BQ24190_REG_MOC_DPDM_EN_SHIFT 7
#define BQ24190_REG_MOC_TMR2X_EN_MASK BIT(6)
#define BQ24190_REG_MOC_TMR2X_EN_SHIFT 6
#define BQ24190_REG_MOC_BATFET_DISABLE_MASK BIT(5)
#define BQ24190_REG_MOC_BATFET_DISABLE_SHIFT 5
#define BQ24190_REG_MOC_JEITA_VSET_MASK BIT(4)
#define BQ24190_REG_MOC_JEITA_VSET_SHIFT 4
#define BQ24190_REG_MOC_INT_MASK_MASK (BIT(1) | BIT(0))
#define BQ24190_REG_MOC_INT_MASK_SHIFT 0
#define BQ24190_REG_SS 0x08 /* System Status */
#define BQ24190_REG_SS_VBUS_STAT_MASK (BIT(7) | BIT(6))
#define BQ24190_REG_SS_VBUS_STAT_SHIFT 6
#define BQ24190_REG_SS_CHRG_STAT_MASK (BIT(5) | BIT(4))
#define BQ24190_REG_SS_CHRG_STAT_SHIFT 4
#define BQ24190_REG_SS_DPM_STAT_MASK BIT(3)
#define BQ24190_REG_SS_DPM_STAT_SHIFT 3
#define BQ24190_REG_SS_PG_STAT_MASK BIT(2)
#define BQ24190_REG_SS_PG_STAT_SHIFT 2
#define BQ24190_REG_SS_THERM_STAT_MASK BIT(1)
#define BQ24190_REG_SS_THERM_STAT_SHIFT 1
#define BQ24190_REG_SS_VSYS_STAT_MASK BIT(0)
#define BQ24190_REG_SS_VSYS_STAT_SHIFT 0
#define BQ24190_REG_F 0x09 /* Fault */
#define BQ24190_REG_F_WATCHDOG_FAULT_MASK BIT(7)
#define BQ24190_REG_F_WATCHDOG_FAULT_SHIFT 7
#define BQ24190_REG_F_BOOST_FAULT_MASK BIT(6)
#define BQ24190_REG_F_BOOST_FAULT_SHIFT 6
#define BQ24190_REG_F_CHRG_FAULT_MASK (BIT(5) | BIT(4))
#define BQ24190_REG_F_CHRG_FAULT_SHIFT 4
#define BQ24190_REG_F_BAT_FAULT_MASK BIT(3)
#define BQ24190_REG_F_BAT_FAULT_SHIFT 3
#define BQ24190_REG_F_NTC_FAULT_MASK (BIT(2) | BIT(1) | BIT(0))
#define BQ24190_REG_F_NTC_FAULT_SHIFT 0
#define BQ24190_REG_VPRS 0x0A /* Vendor/Part/Revision Status */
#define BQ24190_REG_VPRS_PN_MASK (BIT(5) | BIT(4) | BIT(3))
#define BQ24190_REG_VPRS_PN_SHIFT 3
#define BQ24190_REG_VPRS_PN_24190 0x4
#define BQ24190_REG_VPRS_PN_24192 0x5 /* Also 24193, 24196 */
#define BQ24190_REG_VPRS_PN_24192I 0x3
#define BQ24190_REG_VPRS_TS_PROFILE_MASK BIT(2)
#define BQ24190_REG_VPRS_TS_PROFILE_SHIFT 2
#define BQ24190_REG_VPRS_DEV_REG_MASK (BIT(1) | BIT(0))
#define BQ24190_REG_VPRS_DEV_REG_SHIFT 0
/*
* The FAULT register is latched by the bq24190 (except for NTC_FAULT)
* so the first read after a fault returns the latched value and subsequent
* reads return the current value. In order to return the fault status
* to the user, have the interrupt handler save the reg's value and retrieve
* it in the appropriate health/status routine.
*/
struct bq24190_dev_info {
struct i2c_client *client;
struct device *dev;
struct extcon_dev *edev;
struct power_supply *charger;
struct power_supply *battery;
struct delayed_work input_current_limit_work;
char model_name[I2C_NAME_SIZE];
bool initialized;
bool irq_event;
bool otg_vbus_enabled;
int charge_type;
u16 sys_min;
u16 iprechg;
u16 iterm;
u32 ichg;
u32 ichg_max;
u32 vreg;
u32 vreg_max;
struct mutex f_reg_lock;
u8 f_reg;
u8 ss_reg;
u8 watchdog;
};
static int bq24190_charger_set_charge_type(struct bq24190_dev_info *bdi,
const union power_supply_propval *val);
static const unsigned int bq24190_usb_extcon_cable[] = {
EXTCON_USB,
EXTCON_NONE,
};
/*
* The tables below provide a 2-way mapping for the value that goes in
* the register field and the real-world value that it represents.
* The index of the array is the value that goes in the register; the
* number at that index in the array is the real-world value that it
* represents.
*/
/* REG00[2:0] (IINLIM) in uAh */
static const int bq24190_isc_iinlim_values[] = {
100000, 150000, 500000, 900000, 1200000, 1500000, 2000000, 3000000
};
/* REG02[7:2] (ICHG) in uAh */
static const int bq24190_ccc_ichg_values[] = {
512000, 576000, 640000, 704000, 768000, 832000, 896000, 960000,
1024000, 1088000, 1152000, 1216000, 1280000, 1344000, 1408000, 1472000,
1536000, 1600000, 1664000, 1728000, 1792000, 1856000, 1920000, 1984000,
2048000, 2112000, 2176000, 2240000, 2304000, 2368000, 2432000, 2496000,
2560000, 2624000, 2688000, 2752000, 2816000, 2880000, 2944000, 3008000,
3072000, 3136000, 3200000, 3264000, 3328000, 3392000, 3456000, 3520000,
3584000, 3648000, 3712000, 3776000, 3840000, 3904000, 3968000, 4032000,
4096000, 4160000, 4224000, 4288000, 4352000, 4416000, 4480000, 4544000
};
/* REG04[7:2] (VREG) in uV */
static const int bq24190_cvc_vreg_values[] = {
3504000, 3520000, 3536000, 3552000, 3568000, 3584000, 3600000, 3616000,
3632000, 3648000, 3664000, 3680000, 3696000, 3712000, 3728000, 3744000,
3760000, 3776000, 3792000, 3808000, 3824000, 3840000, 3856000, 3872000,
3888000, 3904000, 3920000, 3936000, 3952000, 3968000, 3984000, 4000000,
4016000, 4032000, 4048000, 4064000, 4080000, 4096000, 4112000, 4128000,
4144000, 4160000, 4176000, 4192000, 4208000, 4224000, 4240000, 4256000,
4272000, 4288000, 4304000, 4320000, 4336000, 4352000, 4368000, 4384000,
4400000
};
/* REG06[1:0] (TREG) in tenths of degrees Celsius */
static const int bq24190_ictrc_treg_values[] = {
600, 800, 1000, 1200
};
/*
* Return the index in 'tbl' of greatest value that is less than or equal to
* 'val'. The index range returned is 0 to 'tbl_size' - 1. Assumes that
* the values in 'tbl' are sorted from smallest to largest and 'tbl_size'
* is less than 2^8.
*/
static u8 bq24190_find_idx(const int tbl[], int tbl_size, int v)
{
int i;
for (i = 1; i < tbl_size; i++)
if (v < tbl[i])
break;
return i - 1;
}
/* Basic driver I/O routines */
static int bq24190_read(struct bq24190_dev_info *bdi, u8 reg, u8 *data)
{
int ret;
ret = i2c_smbus_read_byte_data(bdi->client, reg);
if (ret < 0)
return ret;
*data = ret;
return 0;
}
static int bq24190_write(struct bq24190_dev_info *bdi, u8 reg, u8 data)
{
return i2c_smbus_write_byte_data(bdi->client, reg, data);
}
static int bq24190_read_mask(struct bq24190_dev_info *bdi, u8 reg,
u8 mask, u8 shift, u8 *data)
{
u8 v;
int ret;
ret = bq24190_read(bdi, reg, &v);
if (ret < 0)
return ret;
v &= mask;
v >>= shift;
*data = v;
return 0;
}
static int bq24190_write_mask(struct bq24190_dev_info *bdi, u8 reg,
u8 mask, u8 shift, u8 data)
{
u8 v;
int ret;
ret = bq24190_read(bdi, reg, &v);
if (ret < 0)
return ret;
v &= ~mask;
v |= ((data << shift) & mask);
return bq24190_write(bdi, reg, v);
}
static int bq24190_get_field_val(struct bq24190_dev_info *bdi,
u8 reg, u8 mask, u8 shift,
const int tbl[], int tbl_size,
int *val)
{
u8 v;
int ret;
ret = bq24190_read_mask(bdi, reg, mask, shift, &v);
if (ret < 0)
return ret;
v = (v >= tbl_size) ? (tbl_size - 1) : v;
*val = tbl[v];
return 0;
}
static int bq24190_set_field_val(struct bq24190_dev_info *bdi,
u8 reg, u8 mask, u8 shift,
const int tbl[], int tbl_size,
int val)
{
u8 idx;
idx = bq24190_find_idx(tbl, tbl_size, val);
return bq24190_write_mask(bdi, reg, mask, shift, idx);
}
#ifdef CONFIG_SYSFS
/*
* There are a numerous options that are configurable on the bq24190
* that go well beyond what the power_supply properties provide access to.
* Provide sysfs access to them so they can be examined and possibly modified
* on the fly. They will be provided for the charger power_supply object only
* and will be prefixed by 'f_' to make them easier to recognize.
*/
#define BQ24190_SYSFS_FIELD(_name, r, f, m, store) \
{ \
.attr = __ATTR(f_##_name, m, bq24190_sysfs_show, store), \
.reg = BQ24190_REG_##r, \
.mask = BQ24190_REG_##r##_##f##_MASK, \
.shift = BQ24190_REG_##r##_##f##_SHIFT, \
}
#define BQ24190_SYSFS_FIELD_RW(_name, r, f) \
BQ24190_SYSFS_FIELD(_name, r, f, S_IWUSR | S_IRUGO, \
bq24190_sysfs_store)
#define BQ24190_SYSFS_FIELD_RO(_name, r, f) \
BQ24190_SYSFS_FIELD(_name, r, f, S_IRUGO, NULL)
static ssize_t bq24190_sysfs_show(struct device *dev,
struct device_attribute *attr, char *buf);
static ssize_t bq24190_sysfs_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count);
struct bq24190_sysfs_field_info {
struct device_attribute attr;
u8 reg;
u8 mask;
u8 shift;
};
/* On i386 ptrace-abi.h defines SS that breaks the macro calls below. */
#undef SS
static struct bq24190_sysfs_field_info bq24190_sysfs_field_tbl[] = {
/* sysfs name reg field in reg */
BQ24190_SYSFS_FIELD_RW(en_hiz, ISC, EN_HIZ),
BQ24190_SYSFS_FIELD_RW(vindpm, ISC, VINDPM),
BQ24190_SYSFS_FIELD_RW(iinlim, ISC, IINLIM),
BQ24190_SYSFS_FIELD_RW(chg_config, POC, CHG_CONFIG),
BQ24190_SYSFS_FIELD_RW(sys_min, POC, SYS_MIN),
BQ24190_SYSFS_FIELD_RW(boost_lim, POC, BOOST_LIM),
BQ24190_SYSFS_FIELD_RW(ichg, CCC, ICHG),
BQ24190_SYSFS_FIELD_RW(force_20_pct, CCC, FORCE_20PCT),
BQ24190_SYSFS_FIELD_RW(iprechg, PCTCC, IPRECHG),
BQ24190_SYSFS_FIELD_RW(iterm, PCTCC, ITERM),
BQ24190_SYSFS_FIELD_RW(vreg, CVC, VREG),
BQ24190_SYSFS_FIELD_RW(batlowv, CVC, BATLOWV),
BQ24190_SYSFS_FIELD_RW(vrechg, CVC, VRECHG),
BQ24190_SYSFS_FIELD_RW(en_term, CTTC, EN_TERM),
BQ24190_SYSFS_FIELD_RW(term_stat, CTTC, TERM_STAT),
BQ24190_SYSFS_FIELD_RO(watchdog, CTTC, WATCHDOG),
BQ24190_SYSFS_FIELD_RW(en_timer, CTTC, EN_TIMER),
BQ24190_SYSFS_FIELD_RW(chg_timer, CTTC, CHG_TIMER),
BQ24190_SYSFS_FIELD_RW(jeta_iset, CTTC, JEITA_ISET),
BQ24190_SYSFS_FIELD_RW(bat_comp, ICTRC, BAT_COMP),
BQ24190_SYSFS_FIELD_RW(vclamp, ICTRC, VCLAMP),
BQ24190_SYSFS_FIELD_RW(treg, ICTRC, TREG),
BQ24190_SYSFS_FIELD_RW(dpdm_en, MOC, DPDM_EN),
BQ24190_SYSFS_FIELD_RW(tmr2x_en, MOC, TMR2X_EN),
BQ24190_SYSFS_FIELD_RW(batfet_disable, MOC, BATFET_DISABLE),
BQ24190_SYSFS_FIELD_RW(jeita_vset, MOC, JEITA_VSET),
BQ24190_SYSFS_FIELD_RO(int_mask, MOC, INT_MASK),
BQ24190_SYSFS_FIELD_RO(vbus_stat, SS, VBUS_STAT),
BQ24190_SYSFS_FIELD_RO(chrg_stat, SS, CHRG_STAT),
BQ24190_SYSFS_FIELD_RO(dpm_stat, SS, DPM_STAT),
BQ24190_SYSFS_FIELD_RO(pg_stat, SS, PG_STAT),
BQ24190_SYSFS_FIELD_RO(therm_stat, SS, THERM_STAT),
BQ24190_SYSFS_FIELD_RO(vsys_stat, SS, VSYS_STAT),
BQ24190_SYSFS_FIELD_RO(watchdog_fault, F, WATCHDOG_FAULT),
BQ24190_SYSFS_FIELD_RO(boost_fault, F, BOOST_FAULT),
BQ24190_SYSFS_FIELD_RO(chrg_fault, F, CHRG_FAULT),
BQ24190_SYSFS_FIELD_RO(bat_fault, F, BAT_FAULT),
BQ24190_SYSFS_FIELD_RO(ntc_fault, F, NTC_FAULT),
BQ24190_SYSFS_FIELD_RO(pn, VPRS, PN),
BQ24190_SYSFS_FIELD_RO(ts_profile, VPRS, TS_PROFILE),
BQ24190_SYSFS_FIELD_RO(dev_reg, VPRS, DEV_REG),
};
static struct attribute *
bq24190_sysfs_attrs[ARRAY_SIZE(bq24190_sysfs_field_tbl) + 1];
ATTRIBUTE_GROUPS(bq24190_sysfs);
static void bq24190_sysfs_init_attrs(void)
{
int i, limit = ARRAY_SIZE(bq24190_sysfs_field_tbl);
for (i = 0; i < limit; i++)
bq24190_sysfs_attrs[i] = &bq24190_sysfs_field_tbl[i].attr.attr;
bq24190_sysfs_attrs[limit] = NULL; /* Has additional entry for this */
}
static struct bq24190_sysfs_field_info *bq24190_sysfs_field_lookup(
const char *name)
{
int i, limit = ARRAY_SIZE(bq24190_sysfs_field_tbl);
for (i = 0; i < limit; i++)
if (!strcmp(name, bq24190_sysfs_field_tbl[i].attr.attr.name))
break;
if (i >= limit)
return NULL;
return &bq24190_sysfs_field_tbl[i];
}
static ssize_t bq24190_sysfs_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct power_supply *psy = dev_get_drvdata(dev);
struct bq24190_dev_info *bdi = power_supply_get_drvdata(psy);
struct bq24190_sysfs_field_info *info;
ssize_t count;
int ret;
u8 v;
info = bq24190_sysfs_field_lookup(attr->attr.name);
if (!info)
return -EINVAL;
ret = pm_runtime_resume_and_get(bdi->dev);
if (ret < 0)
return ret;
ret = bq24190_read_mask(bdi, info->reg, info->mask, info->shift, &v);
if (ret)
count = ret;
else
count = sysfs_emit(buf, "%hhx\n", v);
pm_runtime_mark_last_busy(bdi->dev);
pm_runtime_put_autosuspend(bdi->dev);
return count;
}
static ssize_t bq24190_sysfs_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct power_supply *psy = dev_get_drvdata(dev);
struct bq24190_dev_info *bdi = power_supply_get_drvdata(psy);
struct bq24190_sysfs_field_info *info;
int ret;
u8 v;
info = bq24190_sysfs_field_lookup(attr->attr.name);
if (!info)
return -EINVAL;
ret = kstrtou8(buf, 0, &v);
if (ret < 0)
return ret;
ret = pm_runtime_resume_and_get(bdi->dev);
if (ret < 0)
return ret;
ret = bq24190_write_mask(bdi, info->reg, info->mask, info->shift, v);
if (ret)
count = ret;
pm_runtime_mark_last_busy(bdi->dev);
pm_runtime_put_autosuspend(bdi->dev);
return count;
}
#endif
static int bq24190_set_otg_vbus(struct bq24190_dev_info *bdi, bool enable)
{
union power_supply_propval val = { .intval = bdi->charge_type };
int ret;
ret = pm_runtime_resume_and_get(bdi->dev);
if (ret < 0) {
dev_warn(bdi->dev, "pm_runtime_get failed: %i\n", ret);
return ret;
}
bdi->otg_vbus_enabled = enable;
if (enable)
ret = bq24190_write_mask(bdi, BQ24190_REG_POC,
BQ24190_REG_POC_CHG_CONFIG_MASK,
BQ24190_REG_POC_CHG_CONFIG_SHIFT,
BQ24190_REG_POC_CHG_CONFIG_OTG);
else
ret = bq24190_charger_set_charge_type(bdi, &val);
pm_runtime_mark_last_busy(bdi->dev);
pm_runtime_put_autosuspend(bdi->dev);
return ret;
}
#ifdef CONFIG_REGULATOR
static int bq24190_vbus_enable(struct regulator_dev *dev)
{
return bq24190_set_otg_vbus(rdev_get_drvdata(dev), true);
}
static int bq24190_vbus_disable(struct regulator_dev *dev)
{
return bq24190_set_otg_vbus(rdev_get_drvdata(dev), false);
}
static int bq24190_vbus_is_enabled(struct regulator_dev *dev)
{
struct bq24190_dev_info *bdi = rdev_get_drvdata(dev);
int ret;
u8 val;
ret = pm_runtime_resume_and_get(bdi->dev);
if (ret < 0) {
dev_warn(bdi->dev, "pm_runtime_get failed: %i\n", ret);
return ret;
}
ret = bq24190_read_mask(bdi, BQ24190_REG_POC,
BQ24190_REG_POC_CHG_CONFIG_MASK,
BQ24190_REG_POC_CHG_CONFIG_SHIFT, &val);
pm_runtime_mark_last_busy(bdi->dev);
pm_runtime_put_autosuspend(bdi->dev);
if (ret)
return ret;
bdi->otg_vbus_enabled = (val == BQ24190_REG_POC_CHG_CONFIG_OTG ||
val == BQ24190_REG_POC_CHG_CONFIG_OTG_ALT);
return bdi->otg_vbus_enabled;
}
static const struct regulator_ops bq24190_vbus_ops = {
.enable = bq24190_vbus_enable,
.disable = bq24190_vbus_disable,
.is_enabled = bq24190_vbus_is_enabled,
};
static const struct regulator_desc bq24190_vbus_desc = {
.name = "usb_otg_vbus",
.of_match = "usb-otg-vbus",
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.ops = &bq24190_vbus_ops,
.fixed_uV = 5000000,
.n_voltages = 1,
};
static const struct regulator_init_data bq24190_vbus_init_data = {
.constraints = {
.valid_ops_mask = REGULATOR_CHANGE_STATUS,
},
};
static int bq24190_register_vbus_regulator(struct bq24190_dev_info *bdi)
{
struct bq24190_platform_data *pdata = bdi->dev->platform_data;
struct regulator_config cfg = { };
struct regulator_dev *reg;
int ret = 0;
cfg.dev = bdi->dev;
if (pdata && pdata->regulator_init_data)
cfg.init_data = pdata->regulator_init_data;
else
cfg.init_data = &bq24190_vbus_init_data;
cfg.driver_data = bdi;
reg = devm_regulator_register(bdi->dev, &bq24190_vbus_desc, &cfg);
if (IS_ERR(reg)) {
ret = PTR_ERR(reg);
dev_err(bdi->dev, "Can't register regulator: %d\n", ret);
}
return ret;
}
#else
static int bq24190_register_vbus_regulator(struct bq24190_dev_info *bdi)
{
return 0;
}
#endif
static int bq24190_set_config(struct bq24190_dev_info *bdi)
{
int ret;
u8 v;
ret = bq24190_read(bdi, BQ24190_REG_CTTC, &v);
if (ret < 0)
return ret;
bdi->watchdog = ((v & BQ24190_REG_CTTC_WATCHDOG_MASK) >>
BQ24190_REG_CTTC_WATCHDOG_SHIFT);
/*
* According to the "Host Mode and default Mode" section of the
* manual, a write to any register causes the bq24190 to switch
* from default mode to host mode. It will switch back to default
* mode after a WDT timeout unless the WDT is turned off as well.
* So, by simply turning off the WDT, we accomplish both with the
* same write.
*/
v &= ~BQ24190_REG_CTTC_WATCHDOG_MASK;
ret = bq24190_write(bdi, BQ24190_REG_CTTC, v);
if (ret < 0)
return ret;
if (bdi->sys_min) {
v = bdi->sys_min / 100 - 30; // manual section 9.5.1.2, table 9
ret = bq24190_write_mask(bdi, BQ24190_REG_POC,
BQ24190_REG_POC_SYS_MIN_MASK,
BQ24190_REG_POC_SYS_MIN_SHIFT,
v);
if (ret < 0)
return ret;
}
if (bdi->iprechg) {
v = bdi->iprechg / 128 - 1; // manual section 9.5.1.4, table 11
ret = bq24190_write_mask(bdi, BQ24190_REG_PCTCC,
BQ24190_REG_PCTCC_IPRECHG_MASK,
BQ24190_REG_PCTCC_IPRECHG_SHIFT,
v);
if (ret < 0)
return ret;
}
if (bdi->iterm) {
v = bdi->iterm / 128 - 1; // manual section 9.5.1.4, table 11
ret = bq24190_write_mask(bdi, BQ24190_REG_PCTCC,
BQ24190_REG_PCTCC_ITERM_MASK,
BQ24190_REG_PCTCC_ITERM_SHIFT,
v);
if (ret < 0)
return ret;
}
if (bdi->ichg) {
ret = bq24190_set_field_val(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_ICHG_MASK,
BQ24190_REG_CCC_ICHG_SHIFT,
bq24190_ccc_ichg_values,
ARRAY_SIZE(bq24190_ccc_ichg_values),
bdi->ichg);
if (ret < 0)
return ret;
}
if (bdi->vreg) {
ret = bq24190_set_field_val(bdi, BQ24190_REG_CVC,
BQ24190_REG_CVC_VREG_MASK,
BQ24190_REG_CVC_VREG_SHIFT,
bq24190_cvc_vreg_values,
ARRAY_SIZE(bq24190_cvc_vreg_values),
bdi->vreg);
if (ret < 0)
return ret;
}
return 0;
}
static int bq24190_register_reset(struct bq24190_dev_info *bdi)
{
int ret, limit = 100;
u8 v;
/*
* This prop. can be passed on device instantiation from platform code:
* struct property_entry pe[] =
* { PROPERTY_ENTRY_BOOL("disable-reset"), ... };
* struct i2c_board_info bi =
* { .type = "bq24190", .addr = 0x6b, .properties = pe, .irq = irq };
* struct i2c_adapter ad = { ... };
* i2c_add_adapter(&ad);
* i2c_new_client_device(&ad, &bi);
*/
if (device_property_read_bool(bdi->dev, "disable-reset"))
return 0;
/* Reset the registers */
ret = bq24190_write_mask(bdi, BQ24190_REG_POC,
BQ24190_REG_POC_RESET_MASK,
BQ24190_REG_POC_RESET_SHIFT,
0x1);
if (ret < 0)
return ret;
/* Reset bit will be cleared by hardware so poll until it is */
do {
ret = bq24190_read_mask(bdi, BQ24190_REG_POC,
BQ24190_REG_POC_RESET_MASK,
BQ24190_REG_POC_RESET_SHIFT,
&v);
if (ret < 0)
return ret;
if (v == 0)
return 0;
usleep_range(100, 200);
} while (--limit);
return -EIO;
}
/* Charger power supply property routines */
static int bq24190_charger_get_charge_type(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 v;
int type, ret;
ret = bq24190_read_mask(bdi, BQ24190_REG_POC,
BQ24190_REG_POC_CHG_CONFIG_MASK,
BQ24190_REG_POC_CHG_CONFIG_SHIFT,
&v);
if (ret < 0)
return ret;
/* If POC[CHG_CONFIG] (REG01[5:4]) == 0, charge is disabled */
if (!v) {
type = POWER_SUPPLY_CHARGE_TYPE_NONE;
} else {
ret = bq24190_read_mask(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_FORCE_20PCT_MASK,
BQ24190_REG_CCC_FORCE_20PCT_SHIFT,
&v);
if (ret < 0)
return ret;
type = (v) ? POWER_SUPPLY_CHARGE_TYPE_TRICKLE :
POWER_SUPPLY_CHARGE_TYPE_FAST;
}
val->intval = type;
return 0;
}
static int bq24190_charger_set_charge_type(struct bq24190_dev_info *bdi,
const union power_supply_propval *val)
{
u8 chg_config, force_20pct, en_term;
int ret;
/*
* According to the "Termination when REG02[0] = 1" section of
* the bq24190 manual, the trickle charge could be less than the
* termination current so it recommends turning off the termination
* function.
*
* Note: AFAICT from the datasheet, the user will have to manually
* turn off the charging when in 20% mode. If its not turned off,
* there could be battery damage. So, use this mode at your own risk.
*/
switch (val->intval) {
case POWER_SUPPLY_CHARGE_TYPE_NONE:
chg_config = 0x0;
break;
case POWER_SUPPLY_CHARGE_TYPE_TRICKLE:
chg_config = 0x1;
force_20pct = 0x1;
en_term = 0x0;
break;
case POWER_SUPPLY_CHARGE_TYPE_FAST:
chg_config = 0x1;
force_20pct = 0x0;
en_term = 0x1;
break;
default:
return -EINVAL;
}
bdi->charge_type = val->intval;
/*
* If the 5V Vbus boost regulator is enabled delay setting
* the charge-type until its gets disabled.
*/
if (bdi->otg_vbus_enabled)
return 0;
if (chg_config) { /* Enabling the charger */
ret = bq24190_write_mask(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_FORCE_20PCT_MASK,
BQ24190_REG_CCC_FORCE_20PCT_SHIFT,
force_20pct);
if (ret < 0)
return ret;
ret = bq24190_write_mask(bdi, BQ24190_REG_CTTC,
BQ24190_REG_CTTC_EN_TERM_MASK,
BQ24190_REG_CTTC_EN_TERM_SHIFT,
en_term);
if (ret < 0)
return ret;
}
return bq24190_write_mask(bdi, BQ24190_REG_POC,
BQ24190_REG_POC_CHG_CONFIG_MASK,
BQ24190_REG_POC_CHG_CONFIG_SHIFT, chg_config);
}
static int bq24190_charger_get_health(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 v;
int health;
mutex_lock(&bdi->f_reg_lock);
v = bdi->f_reg;
mutex_unlock(&bdi->f_reg_lock);
if (v & BQ24190_REG_F_NTC_FAULT_MASK) {
switch (v >> BQ24190_REG_F_NTC_FAULT_SHIFT & 0x7) {
case 0x1: /* TS1 Cold */
case 0x3: /* TS2 Cold */
case 0x5: /* Both Cold */
health = POWER_SUPPLY_HEALTH_COLD;
break;
case 0x2: /* TS1 Hot */
case 0x4: /* TS2 Hot */
case 0x6: /* Both Hot */
health = POWER_SUPPLY_HEALTH_OVERHEAT;
break;
default:
health = POWER_SUPPLY_HEALTH_UNKNOWN;
}
} else if (v & BQ24190_REG_F_BAT_FAULT_MASK) {
health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
} else if (v & BQ24190_REG_F_CHRG_FAULT_MASK) {
switch (v >> BQ24190_REG_F_CHRG_FAULT_SHIFT & 0x3) {
case 0x1: /* Input Fault (VBUS OVP or VBAT<VBUS<3.8V) */
/*
* This could be over-voltage or under-voltage
* and there's no way to tell which. Instead
* of looking foolish and returning 'OVERVOLTAGE'
* when its really under-voltage, just return
* 'UNSPEC_FAILURE'.
*/
health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
break;
case 0x2: /* Thermal Shutdown */
health = POWER_SUPPLY_HEALTH_OVERHEAT;
break;
case 0x3: /* Charge Safety Timer Expiration */
health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
break;
default: /* prevent compiler warning */
health = -1;
}
} else if (v & BQ24190_REG_F_BOOST_FAULT_MASK) {
/*
* This could be over-current or over-voltage but there's
* no way to tell which. Return 'OVERVOLTAGE' since there
* isn't an 'OVERCURRENT' value defined that we can return
* even if it was over-current.
*/
health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
} else {
health = POWER_SUPPLY_HEALTH_GOOD;
}
val->intval = health;
return 0;
}
static int bq24190_charger_get_online(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 pg_stat, batfet_disable;
int ret;
ret = bq24190_read_mask(bdi, BQ24190_REG_SS,
BQ24190_REG_SS_PG_STAT_MASK,
BQ24190_REG_SS_PG_STAT_SHIFT, &pg_stat);
if (ret < 0)
return ret;
ret = bq24190_read_mask(bdi, BQ24190_REG_MOC,
BQ24190_REG_MOC_BATFET_DISABLE_MASK,
BQ24190_REG_MOC_BATFET_DISABLE_SHIFT, &batfet_disable);
if (ret < 0)
return ret;
val->intval = pg_stat && !batfet_disable;
return 0;
}
static int bq24190_battery_set_online(struct bq24190_dev_info *bdi,
const union power_supply_propval *val);
static int bq24190_battery_get_status(struct bq24190_dev_info *bdi,
union power_supply_propval *val);
static int bq24190_battery_get_temp_alert_max(struct bq24190_dev_info *bdi,
union power_supply_propval *val);
static int bq24190_battery_set_temp_alert_max(struct bq24190_dev_info *bdi,
const union power_supply_propval *val);
static int bq24190_charger_set_online(struct bq24190_dev_info *bdi,
const union power_supply_propval *val)
{
return bq24190_battery_set_online(bdi, val);
}
static int bq24190_charger_get_status(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
return bq24190_battery_get_status(bdi, val);
}
static int bq24190_charger_get_temp_alert_max(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
return bq24190_battery_get_temp_alert_max(bdi, val);
}
static int bq24190_charger_set_temp_alert_max(struct bq24190_dev_info *bdi,
const union power_supply_propval *val)
{
return bq24190_battery_set_temp_alert_max(bdi, val);
}
static int bq24190_charger_get_precharge(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 v;
int curr, ret;
ret = bq24190_read_mask(bdi, BQ24190_REG_PCTCC,
BQ24190_REG_PCTCC_IPRECHG_MASK,
BQ24190_REG_PCTCC_IPRECHG_SHIFT, &v);
if (ret < 0)
return ret;
curr = ++v * 128 * 1000;
ret = bq24190_read_mask(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_FORCE_20PCT_MASK,
BQ24190_REG_CCC_FORCE_20PCT_SHIFT, &v);
if (ret < 0)
return ret;
/* If FORCE_20PCT is enabled, then current is 50% of IPRECHG value */
if (v)
curr /= 2;
val->intval = curr;
return 0;
}
static int bq24190_charger_get_charge_term(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 v;
int ret;
ret = bq24190_read_mask(bdi, BQ24190_REG_PCTCC,
BQ24190_REG_PCTCC_ITERM_MASK,
BQ24190_REG_PCTCC_ITERM_SHIFT, &v);
if (ret < 0)
return ret;
val->intval = ++v * 128 * 1000;
return 0;
}
static int bq24190_charger_get_current(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 v;
int curr, ret;
ret = bq24190_get_field_val(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_ICHG_MASK, BQ24190_REG_CCC_ICHG_SHIFT,
bq24190_ccc_ichg_values,
ARRAY_SIZE(bq24190_ccc_ichg_values), &curr);
if (ret < 0)
return ret;
ret = bq24190_read_mask(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_FORCE_20PCT_MASK,
BQ24190_REG_CCC_FORCE_20PCT_SHIFT, &v);
if (ret < 0)
return ret;
/* If FORCE_20PCT is enabled, then current is 20% of ICHG value */
if (v)
curr /= 5;
val->intval = curr;
return 0;
}
static int bq24190_charger_set_current(struct bq24190_dev_info *bdi,
const union power_supply_propval *val)
{
u8 v;
int ret, curr = val->intval;
ret = bq24190_read_mask(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_FORCE_20PCT_MASK,
BQ24190_REG_CCC_FORCE_20PCT_SHIFT, &v);
if (ret < 0)
return ret;
/* If FORCE_20PCT is enabled, have to multiply value passed in by 5 */
if (v)
curr *= 5;
if (curr > bdi->ichg_max)
return -EINVAL;
ret = bq24190_set_field_val(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_ICHG_MASK, BQ24190_REG_CCC_ICHG_SHIFT,
bq24190_ccc_ichg_values,
ARRAY_SIZE(bq24190_ccc_ichg_values), curr);
if (ret < 0)
return ret;
bdi->ichg = curr;
return 0;
}
static int bq24190_charger_get_voltage(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
int voltage, ret;
ret = bq24190_get_field_val(bdi, BQ24190_REG_CVC,
BQ24190_REG_CVC_VREG_MASK, BQ24190_REG_CVC_VREG_SHIFT,
bq24190_cvc_vreg_values,
ARRAY_SIZE(bq24190_cvc_vreg_values), &voltage);
if (ret < 0)
return ret;
val->intval = voltage;
return 0;
}
static int bq24190_charger_set_voltage(struct bq24190_dev_info *bdi,
const union power_supply_propval *val)
{
int ret;
if (val->intval > bdi->vreg_max)
return -EINVAL;
ret = bq24190_set_field_val(bdi, BQ24190_REG_CVC,
BQ24190_REG_CVC_VREG_MASK, BQ24190_REG_CVC_VREG_SHIFT,
bq24190_cvc_vreg_values,
ARRAY_SIZE(bq24190_cvc_vreg_values), val->intval);
if (ret < 0)
return ret;
bdi->vreg = val->intval;
return 0;
}
static int bq24190_charger_get_iinlimit(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
int iinlimit, ret;
ret = bq24190_get_field_val(bdi, BQ24190_REG_ISC,
BQ24190_REG_ISC_IINLIM_MASK,
BQ24190_REG_ISC_IINLIM_SHIFT,
bq24190_isc_iinlim_values,
ARRAY_SIZE(bq24190_isc_iinlim_values), &iinlimit);
if (ret < 0)
return ret;
val->intval = iinlimit;
return 0;
}
static int bq24190_charger_set_iinlimit(struct bq24190_dev_info *bdi,
const union power_supply_propval *val)
{
return bq24190_set_field_val(bdi, BQ24190_REG_ISC,
BQ24190_REG_ISC_IINLIM_MASK,
BQ24190_REG_ISC_IINLIM_SHIFT,
bq24190_isc_iinlim_values,
ARRAY_SIZE(bq24190_isc_iinlim_values), val->intval);
}
static int bq24190_charger_get_property(struct power_supply *psy,
enum power_supply_property psp, union power_supply_propval *val)
{
struct bq24190_dev_info *bdi = power_supply_get_drvdata(psy);
int ret;
dev_dbg(bdi->dev, "prop: %d\n", psp);
ret = pm_runtime_resume_and_get(bdi->dev);
if (ret < 0)
return ret;
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_TYPE:
ret = bq24190_charger_get_charge_type(bdi, val);
break;
case POWER_SUPPLY_PROP_HEALTH:
ret = bq24190_charger_get_health(bdi, val);
break;
case POWER_SUPPLY_PROP_ONLINE:
ret = bq24190_charger_get_online(bdi, val);
break;
case POWER_SUPPLY_PROP_STATUS:
ret = bq24190_charger_get_status(bdi, val);
break;
case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
ret = bq24190_charger_get_temp_alert_max(bdi, val);
break;
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
ret = bq24190_charger_get_precharge(bdi, val);
break;
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
ret = bq24190_charger_get_charge_term(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = bq24190_charger_get_current(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
val->intval = bdi->ichg_max;
ret = 0;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = bq24190_charger_get_voltage(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
val->intval = bdi->vreg_max;
ret = 0;
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = bq24190_charger_get_iinlimit(bdi, val);
break;
case POWER_SUPPLY_PROP_SCOPE:
val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
ret = 0;
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = bdi->model_name;
ret = 0;
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = BQ24190_MANUFACTURER;
ret = 0;
break;
default:
ret = -ENODATA;
}
pm_runtime_mark_last_busy(bdi->dev);
pm_runtime_put_autosuspend(bdi->dev);
return ret;
}
static int bq24190_charger_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct bq24190_dev_info *bdi = power_supply_get_drvdata(psy);
int ret;
dev_dbg(bdi->dev, "prop: %d\n", psp);
ret = pm_runtime_resume_and_get(bdi->dev);
if (ret < 0)
return ret;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
ret = bq24190_charger_set_online(bdi, val);
break;
case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
ret = bq24190_charger_set_temp_alert_max(bdi, val);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
ret = bq24190_charger_set_charge_type(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = bq24190_charger_set_current(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = bq24190_charger_set_voltage(bdi, val);
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = bq24190_charger_set_iinlimit(bdi, val);
break;
default:
ret = -EINVAL;
}
pm_runtime_mark_last_busy(bdi->dev);
pm_runtime_put_autosuspend(bdi->dev);
return ret;
}
static int bq24190_charger_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
case POWER_SUPPLY_PROP_CHARGE_TYPE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return 1;
default:
return 0;
}
}
static void bq24190_input_current_limit_work(struct work_struct *work)
{
struct bq24190_dev_info *bdi =
container_of(work, struct bq24190_dev_info,
input_current_limit_work.work);
union power_supply_propval val;
int ret;
ret = power_supply_get_property_from_supplier(bdi->charger,
POWER_SUPPLY_PROP_CURRENT_MAX,
&val);
if (ret)
return;
bq24190_charger_set_property(bdi->charger,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
&val);
power_supply_changed(bdi->charger);
}
/* Sync the input-current-limit with our parent supply (if we have one) */
static void bq24190_charger_external_power_changed(struct power_supply *psy)
{
struct bq24190_dev_info *bdi = power_supply_get_drvdata(psy);
/*
* The Power-Good detection may take up to 220ms, sometimes
* the external charger detection is quicker, and the bq24190 will
* reset to iinlim based on its own charger detection (which is not
* hooked up when using external charger detection) resulting in a
* too low default 500mA iinlim. Delay setting the input-current-limit
* for 300ms to avoid this.
*/
queue_delayed_work(system_wq, &bdi->input_current_limit_work,
msecs_to_jiffies(300));
}
static enum power_supply_property bq24190_charger_properties[] = {
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_TEMP_ALERT_MAX,
POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_SCOPE,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static char *bq24190_charger_supplied_to[] = {
"main-battery",
};
static const struct power_supply_desc bq24190_charger_desc = {
.name = "bq24190-charger",
.type = POWER_SUPPLY_TYPE_USB,
.properties = bq24190_charger_properties,
.num_properties = ARRAY_SIZE(bq24190_charger_properties),
.get_property = bq24190_charger_get_property,
.set_property = bq24190_charger_set_property,
.property_is_writeable = bq24190_charger_property_is_writeable,
.external_power_changed = bq24190_charger_external_power_changed,
};
/* Battery power supply property routines */
static int bq24190_battery_get_status(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 ss_reg, chrg_fault;
int status, ret;
mutex_lock(&bdi->f_reg_lock);
chrg_fault = bdi->f_reg;
mutex_unlock(&bdi->f_reg_lock);
chrg_fault &= BQ24190_REG_F_CHRG_FAULT_MASK;
chrg_fault >>= BQ24190_REG_F_CHRG_FAULT_SHIFT;
ret = bq24190_read(bdi, BQ24190_REG_SS, &ss_reg);
if (ret < 0)
return ret;
/*
* The battery must be discharging when any of these are true:
* - there is no good power source;
* - there is a charge fault.
* Could also be discharging when in "supplement mode" but
* there is no way to tell when its in that mode.
*/
if (!(ss_reg & BQ24190_REG_SS_PG_STAT_MASK) || chrg_fault) {
status = POWER_SUPPLY_STATUS_DISCHARGING;
} else {
ss_reg &= BQ24190_REG_SS_CHRG_STAT_MASK;
ss_reg >>= BQ24190_REG_SS_CHRG_STAT_SHIFT;
switch (ss_reg) {
case 0x0: /* Not Charging */
status = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case 0x1: /* Pre-charge */
case 0x2: /* Fast Charging */
status = POWER_SUPPLY_STATUS_CHARGING;
break;
case 0x3: /* Charge Termination Done */
status = POWER_SUPPLY_STATUS_FULL;
break;
default:
ret = -EIO;
}
}
if (!ret)
val->intval = status;
return ret;
}
static int bq24190_battery_get_health(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 v;
int health;
mutex_lock(&bdi->f_reg_lock);
v = bdi->f_reg;
mutex_unlock(&bdi->f_reg_lock);
if (v & BQ24190_REG_F_BAT_FAULT_MASK) {
health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
} else {
v &= BQ24190_REG_F_NTC_FAULT_MASK;
v >>= BQ24190_REG_F_NTC_FAULT_SHIFT;
switch (v) {
case 0x0: /* Normal */
health = POWER_SUPPLY_HEALTH_GOOD;
break;
case 0x1: /* TS1 Cold */
case 0x3: /* TS2 Cold */
case 0x5: /* Both Cold */
health = POWER_SUPPLY_HEALTH_COLD;
break;
case 0x2: /* TS1 Hot */
case 0x4: /* TS2 Hot */
case 0x6: /* Both Hot */
health = POWER_SUPPLY_HEALTH_OVERHEAT;
break;
default:
health = POWER_SUPPLY_HEALTH_UNKNOWN;
}
}
val->intval = health;
return 0;
}
static int bq24190_battery_get_online(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 batfet_disable;
int ret;
ret = bq24190_read_mask(bdi, BQ24190_REG_MOC,
BQ24190_REG_MOC_BATFET_DISABLE_MASK,
BQ24190_REG_MOC_BATFET_DISABLE_SHIFT, &batfet_disable);
if (ret < 0)
return ret;
val->intval = !batfet_disable;
return 0;
}
static int bq24190_battery_set_online(struct bq24190_dev_info *bdi,
const union power_supply_propval *val)
{
return bq24190_write_mask(bdi, BQ24190_REG_MOC,
BQ24190_REG_MOC_BATFET_DISABLE_MASK,
BQ24190_REG_MOC_BATFET_DISABLE_SHIFT, !val->intval);
}
static int bq24190_battery_get_temp_alert_max(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
int temp, ret;
ret = bq24190_get_field_val(bdi, BQ24190_REG_ICTRC,
BQ24190_REG_ICTRC_TREG_MASK,
BQ24190_REG_ICTRC_TREG_SHIFT,
bq24190_ictrc_treg_values,
ARRAY_SIZE(bq24190_ictrc_treg_values), &temp);
if (ret < 0)
return ret;
val->intval = temp;
return 0;
}
static int bq24190_battery_set_temp_alert_max(struct bq24190_dev_info *bdi,
const union power_supply_propval *val)
{
return bq24190_set_field_val(bdi, BQ24190_REG_ICTRC,
BQ24190_REG_ICTRC_TREG_MASK,
BQ24190_REG_ICTRC_TREG_SHIFT,
bq24190_ictrc_treg_values,
ARRAY_SIZE(bq24190_ictrc_treg_values), val->intval);
}
static int bq24190_battery_get_property(struct power_supply *psy,
enum power_supply_property psp, union power_supply_propval *val)
{
struct bq24190_dev_info *bdi = power_supply_get_drvdata(psy);
int ret;
dev_warn(bdi->dev, "warning: /sys/class/power_supply/bq24190-battery is deprecated\n");
dev_dbg(bdi->dev, "prop: %d\n", psp);
ret = pm_runtime_resume_and_get(bdi->dev);
if (ret < 0)
return ret;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
ret = bq24190_battery_get_status(bdi, val);
break;
case POWER_SUPPLY_PROP_HEALTH:
ret = bq24190_battery_get_health(bdi, val);
break;
case POWER_SUPPLY_PROP_ONLINE:
ret = bq24190_battery_get_online(bdi, val);
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
/* Could be Li-on or Li-polymer but no way to tell which */
val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
ret = 0;
break;
case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
ret = bq24190_battery_get_temp_alert_max(bdi, val);
break;
case POWER_SUPPLY_PROP_SCOPE:
val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
ret = 0;
break;
default:
ret = -ENODATA;
}
pm_runtime_mark_last_busy(bdi->dev);
pm_runtime_put_autosuspend(bdi->dev);
return ret;
}
static int bq24190_battery_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct bq24190_dev_info *bdi = power_supply_get_drvdata(psy);
int ret;
dev_warn(bdi->dev, "warning: /sys/class/power_supply/bq24190-battery is deprecated\n");
dev_dbg(bdi->dev, "prop: %d\n", psp);
ret = pm_runtime_resume_and_get(bdi->dev);
if (ret < 0)
return ret;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
ret = bq24190_battery_set_online(bdi, val);
break;
case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
ret = bq24190_battery_set_temp_alert_max(bdi, val);
break;
default:
ret = -EINVAL;
}
pm_runtime_mark_last_busy(bdi->dev);
pm_runtime_put_autosuspend(bdi->dev);
return ret;
}
static int bq24190_battery_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
ret = 1;
break;
default:
ret = 0;
}
return ret;
}
static enum power_supply_property bq24190_battery_properties[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_TEMP_ALERT_MAX,
POWER_SUPPLY_PROP_SCOPE,
};
static const struct power_supply_desc bq24190_battery_desc = {
.name = "bq24190-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = bq24190_battery_properties,
.num_properties = ARRAY_SIZE(bq24190_battery_properties),
.get_property = bq24190_battery_get_property,
.set_property = bq24190_battery_set_property,
.property_is_writeable = bq24190_battery_property_is_writeable,
};
static int bq24190_configure_usb_otg(struct bq24190_dev_info *bdi, u8 ss_reg)
{
bool otg_enabled;
int ret;
otg_enabled = !!(ss_reg & BQ24190_REG_SS_VBUS_STAT_MASK);
ret = extcon_set_state_sync(bdi->edev, EXTCON_USB, otg_enabled);
if (ret < 0)
dev_err(bdi->dev, "Can't set extcon state to %d: %d\n",
otg_enabled, ret);
return ret;
}
static void bq24190_check_status(struct bq24190_dev_info *bdi)
{
const u8 battery_mask_ss = BQ24190_REG_SS_CHRG_STAT_MASK;
const u8 battery_mask_f = BQ24190_REG_F_BAT_FAULT_MASK
| BQ24190_REG_F_NTC_FAULT_MASK;
bool alert_charger = false, alert_battery = false;
u8 ss_reg = 0, f_reg = 0;
int i, ret;
ret = bq24190_read(bdi, BQ24190_REG_SS, &ss_reg);
if (ret < 0) {
dev_err(bdi->dev, "Can't read SS reg: %d\n", ret);
return;
}
i = 0;
do {
ret = bq24190_read(bdi, BQ24190_REG_F, &f_reg);
if (ret < 0) {
dev_err(bdi->dev, "Can't read F reg: %d\n", ret);
return;
}
} while (f_reg && ++i < 2);
/* ignore over/under voltage fault after disconnect */
if (f_reg == (1 << BQ24190_REG_F_CHRG_FAULT_SHIFT) &&
!(ss_reg & BQ24190_REG_SS_PG_STAT_MASK))
f_reg = 0;
if (f_reg != bdi->f_reg) {
dev_warn(bdi->dev,
"Fault: boost %d, charge %d, battery %d, ntc %d\n",
!!(f_reg & BQ24190_REG_F_BOOST_FAULT_MASK),
!!(f_reg & BQ24190_REG_F_CHRG_FAULT_MASK),
!!(f_reg & BQ24190_REG_F_BAT_FAULT_MASK),
!!(f_reg & BQ24190_REG_F_NTC_FAULT_MASK));
mutex_lock(&bdi->f_reg_lock);
if ((bdi->f_reg & battery_mask_f) != (f_reg & battery_mask_f))
alert_battery = true;
if ((bdi->f_reg & ~battery_mask_f) != (f_reg & ~battery_mask_f))
alert_charger = true;
bdi->f_reg = f_reg;
mutex_unlock(&bdi->f_reg_lock);
}
if (ss_reg != bdi->ss_reg) {
/*
* The device is in host mode so when PG_STAT goes from 1->0
* (i.e., power removed) HIZ needs to be disabled.
*/
if ((bdi->ss_reg & BQ24190_REG_SS_PG_STAT_MASK) &&
!(ss_reg & BQ24190_REG_SS_PG_STAT_MASK)) {
ret = bq24190_write_mask(bdi, BQ24190_REG_ISC,
BQ24190_REG_ISC_EN_HIZ_MASK,
BQ24190_REG_ISC_EN_HIZ_SHIFT,
0);
if (ret < 0)
dev_err(bdi->dev, "Can't access ISC reg: %d\n",
ret);
}
if ((bdi->ss_reg & battery_mask_ss) != (ss_reg & battery_mask_ss))
alert_battery = true;
if ((bdi->ss_reg & ~battery_mask_ss) != (ss_reg & ~battery_mask_ss))
alert_charger = true;
bdi->ss_reg = ss_reg;
}
if (alert_charger || alert_battery) {
power_supply_changed(bdi->charger);
bq24190_configure_usb_otg(bdi, ss_reg);
}
if (alert_battery && bdi->battery)
power_supply_changed(bdi->battery);
dev_dbg(bdi->dev, "ss_reg: 0x%02x, f_reg: 0x%02x\n", ss_reg, f_reg);
}
static irqreturn_t bq24190_irq_handler_thread(int irq, void *data)
{
struct bq24190_dev_info *bdi = data;
int error;
bdi->irq_event = true;
error = pm_runtime_resume_and_get(bdi->dev);
if (error < 0) {
dev_warn(bdi->dev, "pm_runtime_get failed: %i\n", error);
return IRQ_NONE;
}
bq24190_check_status(bdi);
pm_runtime_mark_last_busy(bdi->dev);
pm_runtime_put_autosuspend(bdi->dev);
bdi->irq_event = false;
return IRQ_HANDLED;
}
static int bq24190_hw_init(struct bq24190_dev_info *bdi)
{
u8 v;
int ret;
/* First check that the device really is what its supposed to be */
ret = bq24190_read_mask(bdi, BQ24190_REG_VPRS,
BQ24190_REG_VPRS_PN_MASK,
BQ24190_REG_VPRS_PN_SHIFT,
&v);
if (ret < 0)
return ret;
switch (v) {
case BQ24190_REG_VPRS_PN_24190:
case BQ24190_REG_VPRS_PN_24192:
case BQ24190_REG_VPRS_PN_24192I:
break;
default:
dev_err(bdi->dev, "Error unknown model: 0x%02x\n", v);
return -ENODEV;
}
ret = bq24190_register_reset(bdi);
if (ret < 0)
return ret;
ret = bq24190_set_config(bdi);
if (ret < 0)
return ret;
return bq24190_read(bdi, BQ24190_REG_SS, &bdi->ss_reg);
}
static int bq24190_get_config(struct bq24190_dev_info *bdi)
{
const char * const s = "ti,system-minimum-microvolt";
struct power_supply_battery_info *info;
int v, idx;
idx = ARRAY_SIZE(bq24190_ccc_ichg_values) - 1;
bdi->ichg_max = bq24190_ccc_ichg_values[idx];
idx = ARRAY_SIZE(bq24190_cvc_vreg_values) - 1;
bdi->vreg_max = bq24190_cvc_vreg_values[idx];
if (device_property_read_u32(bdi->dev, s, &v) == 0) {
v /= 1000;
if (v >= BQ24190_REG_POC_SYS_MIN_MIN
&& v <= BQ24190_REG_POC_SYS_MIN_MAX)
bdi->sys_min = v;
else
dev_warn(bdi->dev, "invalid value for %s: %u\n", s, v);
}
if (!power_supply_get_battery_info(bdi->charger, &info)) {
v = info->precharge_current_ua / 1000;
if (v >= BQ24190_REG_PCTCC_IPRECHG_MIN
&& v <= BQ24190_REG_PCTCC_IPRECHG_MAX)
bdi->iprechg = v;
else
dev_warn(bdi->dev, "invalid value for battery:precharge-current-microamp: %d\n",
v);
v = info->charge_term_current_ua / 1000;
if (v >= BQ24190_REG_PCTCC_ITERM_MIN
&& v <= BQ24190_REG_PCTCC_ITERM_MAX)
bdi->iterm = v;
else
dev_warn(bdi->dev, "invalid value for battery:charge-term-current-microamp: %d\n",
v);
/* These are optional, so no warning when not set */
v = info->constant_charge_current_max_ua;
if (v >= bq24190_ccc_ichg_values[0] && v <= bdi->ichg_max)
bdi->ichg = bdi->ichg_max = v;
v = info->constant_charge_voltage_max_uv;
if (v >= bq24190_cvc_vreg_values[0] && v <= bdi->vreg_max)
bdi->vreg = bdi->vreg_max = v;
}
return 0;
}
static int bq24190_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct i2c_adapter *adapter = client->adapter;
struct device *dev = &client->dev;
struct power_supply_config charger_cfg = {}, battery_cfg = {};
struct bq24190_dev_info *bdi;
int ret;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_err(dev, "No support for SMBUS_BYTE_DATA\n");
return -ENODEV;
}
bdi = devm_kzalloc(dev, sizeof(*bdi), GFP_KERNEL);
if (!bdi) {
dev_err(dev, "Can't alloc bdi struct\n");
return -ENOMEM;
}
bdi->client = client;
bdi->dev = dev;
strncpy(bdi->model_name, id->name, I2C_NAME_SIZE);
mutex_init(&bdi->f_reg_lock);
bdi->charge_type = POWER_SUPPLY_CHARGE_TYPE_FAST;
bdi->f_reg = 0;
bdi->ss_reg = BQ24190_REG_SS_VBUS_STAT_MASK; /* impossible state */
INIT_DELAYED_WORK(&bdi->input_current_limit_work,
bq24190_input_current_limit_work);
i2c_set_clientdata(client, bdi);
if (client->irq <= 0) {
dev_err(dev, "Can't get irq info\n");
return -EINVAL;
}
bdi->edev = devm_extcon_dev_allocate(dev, bq24190_usb_extcon_cable);
if (IS_ERR(bdi->edev))
return PTR_ERR(bdi->edev);
ret = devm_extcon_dev_register(dev, bdi->edev);
if (ret < 0)
return ret;
pm_runtime_enable(dev);
pm_runtime_use_autosuspend(dev);
pm_runtime_set_autosuspend_delay(dev, 600);
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
dev_err(dev, "pm_runtime_get failed: %i\n", ret);
goto out_pmrt;
}
#ifdef CONFIG_SYSFS
bq24190_sysfs_init_attrs();
charger_cfg.attr_grp = bq24190_sysfs_groups;
#endif
charger_cfg.drv_data = bdi;
charger_cfg.of_node = dev->of_node;
charger_cfg.supplied_to = bq24190_charger_supplied_to;
charger_cfg.num_supplicants = ARRAY_SIZE(bq24190_charger_supplied_to);
bdi->charger = power_supply_register(dev, &bq24190_charger_desc,
&charger_cfg);
if (IS_ERR(bdi->charger)) {
dev_err(dev, "Can't register charger\n");
ret = PTR_ERR(bdi->charger);
goto out_pmrt;
}
/* the battery class is deprecated and will be removed. */
/* in the interim, this property hides it. */
if (!device_property_read_bool(dev, "omit-battery-class")) {
battery_cfg.drv_data = bdi;
bdi->battery = power_supply_register(dev, &bq24190_battery_desc,
&battery_cfg);
if (IS_ERR(bdi->battery)) {
dev_err(dev, "Can't register battery\n");
ret = PTR_ERR(bdi->battery);
goto out_charger;
}
}
ret = bq24190_get_config(bdi);
if (ret < 0) {
dev_err(dev, "Can't get devicetree config\n");
goto out_charger;
}
ret = bq24190_hw_init(bdi);
if (ret < 0) {
dev_err(dev, "Hardware init failed\n");
goto out_charger;
}
ret = bq24190_configure_usb_otg(bdi, bdi->ss_reg);
if (ret < 0)
goto out_charger;
bdi->initialized = true;
ret = devm_request_threaded_irq(dev, client->irq, NULL,
bq24190_irq_handler_thread,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
"bq24190-charger", bdi);
if (ret < 0) {
dev_err(dev, "Can't set up irq handler\n");
goto out_charger;
}
ret = bq24190_register_vbus_regulator(bdi);
if (ret < 0)
goto out_charger;
enable_irq_wake(client->irq);
pm_runtime_mark_last_busy(dev);
pm_runtime_put_autosuspend(dev);
return 0;
out_charger:
if (!IS_ERR_OR_NULL(bdi->battery))
power_supply_unregister(bdi->battery);
power_supply_unregister(bdi->charger);
out_pmrt:
pm_runtime_put_sync(dev);
pm_runtime_dont_use_autosuspend(dev);
pm_runtime_disable(dev);
return ret;
}
static void bq24190_remove(struct i2c_client *client)
{
struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
int error;
cancel_delayed_work_sync(&bdi->input_current_limit_work);
error = pm_runtime_resume_and_get(bdi->dev);
if (error < 0)
dev_warn(bdi->dev, "pm_runtime_get failed: %i\n", error);
bq24190_register_reset(bdi);
if (bdi->battery)
power_supply_unregister(bdi->battery);
power_supply_unregister(bdi->charger);
if (error >= 0)
pm_runtime_put_sync(bdi->dev);
pm_runtime_dont_use_autosuspend(bdi->dev);
pm_runtime_disable(bdi->dev);
}
static void bq24190_shutdown(struct i2c_client *client)
{
struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
/* Turn off 5V boost regulator on shutdown */
bq24190_set_otg_vbus(bdi, false);
}
static __maybe_unused int bq24190_runtime_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
if (!bdi->initialized)
return 0;
dev_dbg(bdi->dev, "%s\n", __func__);
return 0;
}
static __maybe_unused int bq24190_runtime_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
if (!bdi->initialized)
return 0;
if (!bdi->irq_event) {
dev_dbg(bdi->dev, "checking events on possible wakeirq\n");
bq24190_check_status(bdi);
}
return 0;
}
static __maybe_unused int bq24190_pm_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
int error;
error = pm_runtime_resume_and_get(bdi->dev);
if (error < 0)
dev_warn(bdi->dev, "pm_runtime_get failed: %i\n", error);
bq24190_register_reset(bdi);
if (error >= 0) {
pm_runtime_mark_last_busy(bdi->dev);
pm_runtime_put_autosuspend(bdi->dev);
}
return 0;
}
static __maybe_unused int bq24190_pm_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
int error;
bdi->f_reg = 0;
bdi->ss_reg = BQ24190_REG_SS_VBUS_STAT_MASK; /* impossible state */
error = pm_runtime_resume_and_get(bdi->dev);
if (error < 0)
dev_warn(bdi->dev, "pm_runtime_get failed: %i\n", error);
bq24190_register_reset(bdi);
bq24190_set_config(bdi);
bq24190_read(bdi, BQ24190_REG_SS, &bdi->ss_reg);
if (error >= 0) {
pm_runtime_mark_last_busy(bdi->dev);
pm_runtime_put_autosuspend(bdi->dev);
}
/* Things may have changed while suspended so alert upper layer */
power_supply_changed(bdi->charger);
if (bdi->battery)
power_supply_changed(bdi->battery);
return 0;
}
static const struct dev_pm_ops bq24190_pm_ops = {
SET_RUNTIME_PM_OPS(bq24190_runtime_suspend, bq24190_runtime_resume,
NULL)
SET_SYSTEM_SLEEP_PM_OPS(bq24190_pm_suspend, bq24190_pm_resume)
};
static const struct i2c_device_id bq24190_i2c_ids[] = {
{ "bq24190" },
{ "bq24192" },
{ "bq24192i" },
{ "bq24196" },
{ },
};
MODULE_DEVICE_TABLE(i2c, bq24190_i2c_ids);
static const struct of_device_id bq24190_of_match[] = {
{ .compatible = "ti,bq24190", },
{ .compatible = "ti,bq24192", },
{ .compatible = "ti,bq24192i", },
{ .compatible = "ti,bq24196", },
{ },
};
MODULE_DEVICE_TABLE(of, bq24190_of_match);
static struct i2c_driver bq24190_driver = {
.probe = bq24190_probe,
.remove = bq24190_remove,
.shutdown = bq24190_shutdown,
.id_table = bq24190_i2c_ids,
.driver = {
.name = "bq24190-charger",
.pm = &bq24190_pm_ops,
.of_match_table = bq24190_of_match,
},
};
module_i2c_driver(bq24190_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mark A. Greer <[email protected]>");
MODULE_DESCRIPTION("TI BQ24190 Charger Driver");
| linux-master | drivers/power/supply/bq24190_charger.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* LEDs triggers for power supply class
*
* Copyright © 2007 Anton Vorontsov <[email protected]>
* Copyright © 2004 Szabolcs Gyurko
* Copyright © 2003 Ian Molton <[email protected]>
*
* Modified: 2004, Oct Szabolcs Gyurko
*/
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
#include <linux/leds.h>
#include "power_supply.h"
/* Battery specific LEDs triggers. */
static void power_supply_update_bat_leds(struct power_supply *psy)
{
union power_supply_propval status;
if (power_supply_get_property(psy, POWER_SUPPLY_PROP_STATUS, &status))
return;
dev_dbg(&psy->dev, "%s %d\n", __func__, status.intval);
switch (status.intval) {
case POWER_SUPPLY_STATUS_FULL:
led_trigger_event(psy->charging_full_trig, LED_FULL);
led_trigger_event(psy->charging_trig, LED_OFF);
led_trigger_event(psy->full_trig, LED_FULL);
/* Going from blink to LED on requires a LED_OFF event to stop blink */
led_trigger_event(psy->charging_blink_full_solid_trig, LED_OFF);
led_trigger_event(psy->charging_blink_full_solid_trig, LED_FULL);
break;
case POWER_SUPPLY_STATUS_CHARGING:
led_trigger_event(psy->charging_full_trig, LED_FULL);
led_trigger_event(psy->charging_trig, LED_FULL);
led_trigger_event(psy->full_trig, LED_OFF);
led_trigger_blink(psy->charging_blink_full_solid_trig, 0, 0);
break;
default:
led_trigger_event(psy->charging_full_trig, LED_OFF);
led_trigger_event(psy->charging_trig, LED_OFF);
led_trigger_event(psy->full_trig, LED_OFF);
led_trigger_event(psy->charging_blink_full_solid_trig,
LED_OFF);
break;
}
}
static int power_supply_create_bat_triggers(struct power_supply *psy)
{
psy->charging_full_trig_name = kasprintf(GFP_KERNEL,
"%s-charging-or-full", psy->desc->name);
if (!psy->charging_full_trig_name)
goto charging_full_failed;
psy->charging_trig_name = kasprintf(GFP_KERNEL,
"%s-charging", psy->desc->name);
if (!psy->charging_trig_name)
goto charging_failed;
psy->full_trig_name = kasprintf(GFP_KERNEL, "%s-full", psy->desc->name);
if (!psy->full_trig_name)
goto full_failed;
psy->charging_blink_full_solid_trig_name = kasprintf(GFP_KERNEL,
"%s-charging-blink-full-solid", psy->desc->name);
if (!psy->charging_blink_full_solid_trig_name)
goto charging_blink_full_solid_failed;
led_trigger_register_simple(psy->charging_full_trig_name,
&psy->charging_full_trig);
led_trigger_register_simple(psy->charging_trig_name,
&psy->charging_trig);
led_trigger_register_simple(psy->full_trig_name,
&psy->full_trig);
led_trigger_register_simple(psy->charging_blink_full_solid_trig_name,
&psy->charging_blink_full_solid_trig);
return 0;
charging_blink_full_solid_failed:
kfree(psy->full_trig_name);
full_failed:
kfree(psy->charging_trig_name);
charging_failed:
kfree(psy->charging_full_trig_name);
charging_full_failed:
return -ENOMEM;
}
static void power_supply_remove_bat_triggers(struct power_supply *psy)
{
led_trigger_unregister_simple(psy->charging_full_trig);
led_trigger_unregister_simple(psy->charging_trig);
led_trigger_unregister_simple(psy->full_trig);
led_trigger_unregister_simple(psy->charging_blink_full_solid_trig);
kfree(psy->charging_blink_full_solid_trig_name);
kfree(psy->full_trig_name);
kfree(psy->charging_trig_name);
kfree(psy->charging_full_trig_name);
}
/* Generated power specific LEDs triggers. */
static void power_supply_update_gen_leds(struct power_supply *psy)
{
union power_supply_propval online;
if (power_supply_get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online))
return;
dev_dbg(&psy->dev, "%s %d\n", __func__, online.intval);
if (online.intval)
led_trigger_event(psy->online_trig, LED_FULL);
else
led_trigger_event(psy->online_trig, LED_OFF);
}
static int power_supply_create_gen_triggers(struct power_supply *psy)
{
psy->online_trig_name = kasprintf(GFP_KERNEL, "%s-online",
psy->desc->name);
if (!psy->online_trig_name)
return -ENOMEM;
led_trigger_register_simple(psy->online_trig_name, &psy->online_trig);
return 0;
}
static void power_supply_remove_gen_triggers(struct power_supply *psy)
{
led_trigger_unregister_simple(psy->online_trig);
kfree(psy->online_trig_name);
}
/* Choice what triggers to create&update. */
void power_supply_update_leds(struct power_supply *psy)
{
if (psy->desc->type == POWER_SUPPLY_TYPE_BATTERY)
power_supply_update_bat_leds(psy);
else
power_supply_update_gen_leds(psy);
}
int power_supply_create_triggers(struct power_supply *psy)
{
if (psy->desc->type == POWER_SUPPLY_TYPE_BATTERY)
return power_supply_create_bat_triggers(psy);
return power_supply_create_gen_triggers(psy);
}
void power_supply_remove_triggers(struct power_supply *psy)
{
if (psy->desc->type == POWER_SUPPLY_TYPE_BATTERY)
power_supply_remove_bat_triggers(psy);
else
power_supply_remove_gen_triggers(psy);
}
| linux-master | drivers/power/supply/power_supply_leds.c |
// SPDX-License-Identifier: GPL-2.0+
/*
* Battery monitor driver for the uPI uG3105 battery monitor
*
* Note the uG3105 is not a full-featured autonomous fuel-gauge. Instead it is
* expected to be use in combination with some always on microcontroller reading
* its coulomb-counter before it can wrap (must be read every 400 seconds!).
*
* Since Linux does not monitor coulomb-counter changes while the device
* is off or suspended, the coulomb counter is not used atm.
*
* Possible improvements:
* 1. Activate commented out total_coulomb_count code
* 2. Reset total_coulomb_count val to 0 when the battery is as good as empty
* and remember that we did this (and clear the flag for this on susp/resume)
* 3. When the battery is full check if the flag that we set total_coulomb_count
* to when the battery was empty is set. If so we now know the capacity,
* not the design, but actual capacity, of the battery
* 4. Add some mechanism (needs userspace help, or maybe use efivar?) to remember
* the actual capacity of the battery over reboots
* 5. When we know the actual capacity at probe time, add energy_now and
* energy_full attributes. Guess boot + resume energy_now value based on ocv
* and then use total_coulomb_count to report energy_now over time, resetting
* things to adjust for drift when empty/full. This should give more accurate
* readings, esp. in the 30-70% range and allow userspace to estimate time
* remaining till empty/full
* 6. Maybe unregister + reregister the psy device when we learn the actual
* capacity during run-time ?
*
* The above will also require some sort of mwh_per_unit calculation. Testing
* has shown that an estimated 7404mWh increase of the battery's energy results
* in a total_coulomb_count increase of 3277 units with a 5 milli-ohm sense R.
*
* Copyright (C) 2021 Hans de Goede <[email protected]>
*/
#include <linux/devm-helpers.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/mod_devicetable.h>
#include <linux/power_supply.h>
#include <linux/workqueue.h>
#define UG3105_MOV_AVG_WINDOW 8
#define UG3105_INIT_POLL_TIME (5 * HZ)
#define UG3105_POLL_TIME (30 * HZ)
#define UG3105_SETTLE_TIME (1 * HZ)
#define UG3105_INIT_POLL_COUNT 30
#define UG3105_REG_MODE 0x00
#define UG3105_REG_CTRL1 0x01
#define UG3105_REG_COULOMB_CNT 0x02
#define UG3105_REG_BAT_VOLT 0x08
#define UG3105_REG_BAT_CURR 0x0c
#define UG3105_MODE_STANDBY 0x00
#define UG3105_MODE_RUN 0x10
#define UG3105_CTRL1_RESET_COULOMB_CNT 0x03
#define UG3105_CURR_HYST_UA 65000
#define UG3105_LOW_BAT_UV 3700000
#define UG3105_FULL_BAT_HYST_UV 38000
struct ug3105_chip {
struct i2c_client *client;
struct power_supply *psy;
struct power_supply_battery_info *info;
struct delayed_work work;
struct mutex lock;
int ocv[UG3105_MOV_AVG_WINDOW]; /* micro-volt */
int intern_res[UG3105_MOV_AVG_WINDOW]; /* milli-ohm */
int poll_count;
int ocv_avg_index;
int ocv_avg; /* micro-volt */
int intern_res_poll_count;
int intern_res_avg_index;
int intern_res_avg; /* milli-ohm */
int volt; /* micro-volt */
int curr; /* micro-ampere */
int total_coulomb_count;
int uv_per_unit;
int ua_per_unit;
int status;
int capacity;
bool supplied;
};
static int ug3105_read_word(struct i2c_client *client, u8 reg)
{
int val;
val = i2c_smbus_read_word_data(client, reg);
if (val < 0)
dev_err(&client->dev, "Error reading reg 0x%02x\n", reg);
return val;
}
static int ug3105_get_status(struct ug3105_chip *chip)
{
int full = chip->info->constant_charge_voltage_max_uv - UG3105_FULL_BAT_HYST_UV;
if (chip->curr > UG3105_CURR_HYST_UA)
return POWER_SUPPLY_STATUS_CHARGING;
if (chip->curr < -UG3105_CURR_HYST_UA)
return POWER_SUPPLY_STATUS_DISCHARGING;
if (chip->supplied && chip->ocv_avg > full)
return POWER_SUPPLY_STATUS_FULL;
return POWER_SUPPLY_STATUS_NOT_CHARGING;
}
static int ug3105_get_capacity(struct ug3105_chip *chip)
{
/*
* OCV voltages in uV for 0-110% in 5% increments, the 100-110% is
* for LiPo HV (High-Voltage) bateries which can go up to 4.35V
* instead of the usual 4.2V.
*/
static const int ocv_capacity_tbl[23] = {
3350000,
3610000,
3690000,
3710000,
3730000,
3750000,
3770000,
3786667,
3803333,
3820000,
3836667,
3853333,
3870000,
3907500,
3945000,
3982500,
4020000,
4075000,
4110000,
4150000,
4200000,
4250000,
4300000,
};
int i, ocv_diff, ocv_step;
if (chip->ocv_avg < ocv_capacity_tbl[0])
return 0;
if (chip->status == POWER_SUPPLY_STATUS_FULL)
return 100;
for (i = 1; i < ARRAY_SIZE(ocv_capacity_tbl); i++) {
if (chip->ocv_avg > ocv_capacity_tbl[i])
continue;
ocv_diff = ocv_capacity_tbl[i] - chip->ocv_avg;
ocv_step = ocv_capacity_tbl[i] - ocv_capacity_tbl[i - 1];
/* scale 0-110% down to 0-100% for LiPo HV */
if (chip->info->constant_charge_voltage_max_uv >= 4300000)
return (i * 500 - ocv_diff * 500 / ocv_step) / 110;
else
return i * 5 - ocv_diff * 5 / ocv_step;
}
return 100;
}
static void ug3105_work(struct work_struct *work)
{
struct ug3105_chip *chip = container_of(work, struct ug3105_chip,
work.work);
int i, val, curr_diff, volt_diff, res, win_size;
bool prev_supplied = chip->supplied;
int prev_status = chip->status;
int prev_volt = chip->volt;
int prev_curr = chip->curr;
struct power_supply *psy;
mutex_lock(&chip->lock);
psy = chip->psy;
if (!psy)
goto out;
val = ug3105_read_word(chip->client, UG3105_REG_BAT_VOLT);
if (val < 0)
goto out;
chip->volt = val * chip->uv_per_unit;
val = ug3105_read_word(chip->client, UG3105_REG_BAT_CURR);
if (val < 0)
goto out;
chip->curr = (s16)val * chip->ua_per_unit;
chip->ocv[chip->ocv_avg_index] =
chip->volt - chip->curr * chip->intern_res_avg / 1000;
chip->ocv_avg_index = (chip->ocv_avg_index + 1) % UG3105_MOV_AVG_WINDOW;
chip->poll_count++;
/*
* See possible improvements comment above.
*
* Read + reset coulomb counter every 10 polls (every 300 seconds)
* if ((chip->poll_count % 10) == 0) {
* val = ug3105_read_word(chip->client, UG3105_REG_COULOMB_CNT);
* if (val < 0)
* goto out;
*
* i2c_smbus_write_byte_data(chip->client, UG3105_REG_CTRL1,
* UG3105_CTRL1_RESET_COULOMB_CNT);
*
* chip->total_coulomb_count += (s16)val;
* dev_dbg(&chip->client->dev, "coulomb count %d total %d\n",
* (s16)val, chip->total_coulomb_count);
* }
*/
chip->ocv_avg = 0;
win_size = min(chip->poll_count, UG3105_MOV_AVG_WINDOW);
for (i = 0; i < win_size; i++)
chip->ocv_avg += chip->ocv[i];
chip->ocv_avg /= win_size;
chip->supplied = power_supply_am_i_supplied(psy);
chip->status = ug3105_get_status(chip);
chip->capacity = ug3105_get_capacity(chip);
/*
* Skip internal resistance calc on charger [un]plug and
* when the battery is almost empty (voltage low).
*/
if (chip->supplied != prev_supplied ||
chip->volt < UG3105_LOW_BAT_UV ||
chip->poll_count < 2)
goto out;
/*
* Assuming that the OCV voltage does not change significantly
* between 2 polls, then we can calculate the internal resistance
* on a significant current change by attributing all voltage
* change between the 2 readings to the internal resistance.
*/
curr_diff = abs(chip->curr - prev_curr);
if (curr_diff < UG3105_CURR_HYST_UA)
goto out;
volt_diff = abs(chip->volt - prev_volt);
res = volt_diff * 1000 / curr_diff;
if ((res < (chip->intern_res_avg * 2 / 3)) ||
(res > (chip->intern_res_avg * 4 / 3))) {
dev_dbg(&chip->client->dev, "Ignoring outlier internal resistance %d mOhm\n", res);
goto out;
}
dev_dbg(&chip->client->dev, "Internal resistance %d mOhm\n", res);
chip->intern_res[chip->intern_res_avg_index] = res;
chip->intern_res_avg_index = (chip->intern_res_avg_index + 1) % UG3105_MOV_AVG_WINDOW;
chip->intern_res_poll_count++;
chip->intern_res_avg = 0;
win_size = min(chip->intern_res_poll_count, UG3105_MOV_AVG_WINDOW);
for (i = 0; i < win_size; i++)
chip->intern_res_avg += chip->intern_res[i];
chip->intern_res_avg /= win_size;
out:
mutex_unlock(&chip->lock);
queue_delayed_work(system_wq, &chip->work,
(chip->poll_count <= UG3105_INIT_POLL_COUNT) ?
UG3105_INIT_POLL_TIME : UG3105_POLL_TIME);
if (chip->status != prev_status && psy)
power_supply_changed(psy);
}
static enum power_supply_property ug3105_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_SCOPE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_OCV,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
};
static int ug3105_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct ug3105_chip *chip = power_supply_get_drvdata(psy);
int ret = 0;
mutex_lock(&chip->lock);
if (!chip->psy) {
ret = -EAGAIN;
goto out;
}
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
val->intval = chip->status;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = 1;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = chip->info->technology;
break;
case POWER_SUPPLY_PROP_SCOPE:
val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = ug3105_read_word(chip->client, UG3105_REG_BAT_VOLT);
if (ret < 0)
break;
val->intval = ret * chip->uv_per_unit;
ret = 0;
break;
case POWER_SUPPLY_PROP_VOLTAGE_OCV:
val->intval = chip->ocv_avg;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = ug3105_read_word(chip->client, UG3105_REG_BAT_CURR);
if (ret < 0)
break;
val->intval = (s16)ret * chip->ua_per_unit;
ret = 0;
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = chip->capacity;
break;
default:
ret = -EINVAL;
}
out:
mutex_unlock(&chip->lock);
return ret;
}
static void ug3105_external_power_changed(struct power_supply *psy)
{
struct ug3105_chip *chip = power_supply_get_drvdata(psy);
dev_dbg(&chip->client->dev, "external power changed\n");
mod_delayed_work(system_wq, &chip->work, UG3105_SETTLE_TIME);
}
static const struct power_supply_desc ug3105_psy_desc = {
.name = "ug3105_battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.get_property = ug3105_get_property,
.external_power_changed = ug3105_external_power_changed,
.properties = ug3105_battery_props,
.num_properties = ARRAY_SIZE(ug3105_battery_props),
};
static void ug3105_init(struct ug3105_chip *chip)
{
chip->poll_count = 0;
chip->ocv_avg_index = 0;
chip->total_coulomb_count = 0;
i2c_smbus_write_byte_data(chip->client, UG3105_REG_MODE,
UG3105_MODE_RUN);
i2c_smbus_write_byte_data(chip->client, UG3105_REG_CTRL1,
UG3105_CTRL1_RESET_COULOMB_CNT);
queue_delayed_work(system_wq, &chip->work, 0);
flush_delayed_work(&chip->work);
}
static int ug3105_probe(struct i2c_client *client)
{
struct power_supply_config psy_cfg = {};
struct device *dev = &client->dev;
u32 curr_sense_res_uohm = 10000;
struct power_supply *psy;
struct ug3105_chip *chip;
int ret;
chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->client = client;
mutex_init(&chip->lock);
ret = devm_delayed_work_autocancel(dev, &chip->work, ug3105_work);
if (ret)
return ret;
psy_cfg.drv_data = chip;
psy = devm_power_supply_register(dev, &ug3105_psy_desc, &psy_cfg);
if (IS_ERR(psy))
return PTR_ERR(psy);
ret = power_supply_get_battery_info(psy, &chip->info);
if (ret)
return ret;
if (chip->info->factory_internal_resistance_uohm == -EINVAL ||
chip->info->constant_charge_voltage_max_uv == -EINVAL) {
dev_err(dev, "error required properties are missing\n");
return -ENODEV;
}
device_property_read_u32(dev, "upisemi,rsns-microohm", &curr_sense_res_uohm);
/*
* DAC maximum is 4.5V divided by 65536 steps + an unknown factor of 10
* coming from somewhere for some reason (verified with a volt-meter).
*/
chip->uv_per_unit = 45000000/65536;
/* Datasheet says 8.1 uV per unit for the current ADC */
chip->ua_per_unit = 8100000 / curr_sense_res_uohm;
/* Use provided internal resistance as start point (in milli-ohm) */
chip->intern_res_avg = chip->info->factory_internal_resistance_uohm / 1000;
/* Also add it to the internal resistance moving average window */
chip->intern_res[0] = chip->intern_res_avg;
chip->intern_res_avg_index = 1;
chip->intern_res_poll_count = 1;
mutex_lock(&chip->lock);
chip->psy = psy;
mutex_unlock(&chip->lock);
ug3105_init(chip);
i2c_set_clientdata(client, chip);
return 0;
}
static int __maybe_unused ug3105_suspend(struct device *dev)
{
struct ug3105_chip *chip = dev_get_drvdata(dev);
cancel_delayed_work_sync(&chip->work);
i2c_smbus_write_byte_data(chip->client, UG3105_REG_MODE,
UG3105_MODE_STANDBY);
return 0;
}
static int __maybe_unused ug3105_resume(struct device *dev)
{
struct ug3105_chip *chip = dev_get_drvdata(dev);
ug3105_init(chip);
return 0;
}
static SIMPLE_DEV_PM_OPS(ug3105_pm_ops, ug3105_suspend,
ug3105_resume);
static const struct i2c_device_id ug3105_id[] = {
{ "ug3105" },
{ }
};
MODULE_DEVICE_TABLE(i2c, ug3105_id);
static struct i2c_driver ug3105_i2c_driver = {
.driver = {
.name = "ug3105",
.pm = &ug3105_pm_ops,
},
.probe = ug3105_probe,
.id_table = ug3105_id,
};
module_i2c_driver(ug3105_i2c_driver);
MODULE_AUTHOR("Hans de Goede <[email protected]");
MODULE_DESCRIPTION("uPI uG3105 battery monitor driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/ug3105_battery.c |
/*
* Copyright © 2007 Anton Vorontsov <[email protected]>
* Copyright © 2007 Eugeny Boger <[email protected]>
*
* Author: Eugeny Boger <[email protected]>
*
* Use consistent with the GNU GPL is permitted,
* provided that this copyright notice is
* preserved in its entirety in all copies and derived works.
*/
#include <linux/module.h>
#include <linux/device.h>
#include <linux/power_supply.h>
#include <linux/apm-emulation.h>
#define PSY_PROP(psy, prop, val) (power_supply_get_property(psy, \
POWER_SUPPLY_PROP_##prop, val))
#define _MPSY_PROP(prop, val) (power_supply_get_property(main_battery, \
prop, val))
#define MPSY_PROP(prop, val) _MPSY_PROP(POWER_SUPPLY_PROP_##prop, val)
static DEFINE_MUTEX(apm_mutex);
static struct power_supply *main_battery;
enum apm_source {
SOURCE_ENERGY,
SOURCE_CHARGE,
SOURCE_VOLTAGE,
};
struct find_bat_param {
struct power_supply *main;
struct power_supply *bat;
struct power_supply *max_charge_bat;
struct power_supply *max_energy_bat;
union power_supply_propval full;
int max_charge;
int max_energy;
};
static int __find_main_battery(struct device *dev, void *data)
{
struct find_bat_param *bp = (struct find_bat_param *)data;
bp->bat = dev_get_drvdata(dev);
if (bp->bat->desc->use_for_apm) {
/* nice, we explicitly asked to report this battery. */
bp->main = bp->bat;
return 1;
}
if (!PSY_PROP(bp->bat, CHARGE_FULL_DESIGN, &bp->full) ||
!PSY_PROP(bp->bat, CHARGE_FULL, &bp->full)) {
if (bp->full.intval > bp->max_charge) {
bp->max_charge_bat = bp->bat;
bp->max_charge = bp->full.intval;
}
} else if (!PSY_PROP(bp->bat, ENERGY_FULL_DESIGN, &bp->full) ||
!PSY_PROP(bp->bat, ENERGY_FULL, &bp->full)) {
if (bp->full.intval > bp->max_energy) {
bp->max_energy_bat = bp->bat;
bp->max_energy = bp->full.intval;
}
}
return 0;
}
static void find_main_battery(void)
{
struct find_bat_param bp;
int error;
memset(&bp, 0, sizeof(struct find_bat_param));
main_battery = NULL;
bp.main = main_battery;
error = class_for_each_device(power_supply_class, NULL, &bp,
__find_main_battery);
if (error) {
main_battery = bp.main;
return;
}
if ((bp.max_energy_bat && bp.max_charge_bat) &&
(bp.max_energy_bat != bp.max_charge_bat)) {
/* try guess battery with more capacity */
if (!PSY_PROP(bp.max_charge_bat, VOLTAGE_MAX_DESIGN,
&bp.full)) {
if (bp.max_energy > bp.max_charge * bp.full.intval)
main_battery = bp.max_energy_bat;
else
main_battery = bp.max_charge_bat;
} else if (!PSY_PROP(bp.max_energy_bat, VOLTAGE_MAX_DESIGN,
&bp.full)) {
if (bp.max_charge > bp.max_energy / bp.full.intval)
main_battery = bp.max_charge_bat;
else
main_battery = bp.max_energy_bat;
} else {
/* give up, choice any */
main_battery = bp.max_energy_bat;
}
} else if (bp.max_charge_bat) {
main_battery = bp.max_charge_bat;
} else if (bp.max_energy_bat) {
main_battery = bp.max_energy_bat;
} else {
/* give up, try the last if any */
main_battery = bp.bat;
}
}
static int do_calculate_time(int status, enum apm_source source)
{
union power_supply_propval full;
union power_supply_propval empty;
union power_supply_propval cur;
union power_supply_propval I;
enum power_supply_property full_prop;
enum power_supply_property full_design_prop;
enum power_supply_property empty_prop;
enum power_supply_property empty_design_prop;
enum power_supply_property cur_avg_prop;
enum power_supply_property cur_now_prop;
if (MPSY_PROP(CURRENT_AVG, &I)) {
/* if battery can't report average value, use momentary */
if (MPSY_PROP(CURRENT_NOW, &I))
return -1;
}
if (!I.intval)
return 0;
switch (source) {
case SOURCE_CHARGE:
full_prop = POWER_SUPPLY_PROP_CHARGE_FULL;
full_design_prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN;
empty_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
cur_avg_prop = POWER_SUPPLY_PROP_CHARGE_AVG;
cur_now_prop = POWER_SUPPLY_PROP_CHARGE_NOW;
break;
case SOURCE_ENERGY:
full_prop = POWER_SUPPLY_PROP_ENERGY_FULL;
full_design_prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN;
empty_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY;
empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
cur_avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG;
cur_now_prop = POWER_SUPPLY_PROP_ENERGY_NOW;
break;
case SOURCE_VOLTAGE:
full_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX;
full_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN;
empty_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN;
empty_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN;
cur_avg_prop = POWER_SUPPLY_PROP_VOLTAGE_AVG;
cur_now_prop = POWER_SUPPLY_PROP_VOLTAGE_NOW;
break;
default:
printk(KERN_ERR "Unsupported source: %d\n", source);
return -1;
}
if (_MPSY_PROP(full_prop, &full)) {
/* if battery can't report this property, use design value */
if (_MPSY_PROP(full_design_prop, &full))
return -1;
}
if (_MPSY_PROP(empty_prop, &empty)) {
/* if battery can't report this property, use design value */
if (_MPSY_PROP(empty_design_prop, &empty))
empty.intval = 0;
}
if (_MPSY_PROP(cur_avg_prop, &cur)) {
/* if battery can't report average value, use momentary */
if (_MPSY_PROP(cur_now_prop, &cur))
return -1;
}
if (status == POWER_SUPPLY_STATUS_CHARGING)
return ((cur.intval - full.intval) * 60L) / I.intval;
else
return -((cur.intval - empty.intval) * 60L) / I.intval;
}
static int calculate_time(int status)
{
int time;
time = do_calculate_time(status, SOURCE_ENERGY);
if (time != -1)
return time;
time = do_calculate_time(status, SOURCE_CHARGE);
if (time != -1)
return time;
time = do_calculate_time(status, SOURCE_VOLTAGE);
if (time != -1)
return time;
return -1;
}
static int calculate_capacity(enum apm_source source)
{
enum power_supply_property full_prop, empty_prop;
enum power_supply_property full_design_prop, empty_design_prop;
enum power_supply_property now_prop, avg_prop;
union power_supply_propval empty, full, cur;
int ret;
switch (source) {
case SOURCE_CHARGE:
full_prop = POWER_SUPPLY_PROP_CHARGE_FULL;
empty_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
full_design_prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN;
empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN;
now_prop = POWER_SUPPLY_PROP_CHARGE_NOW;
avg_prop = POWER_SUPPLY_PROP_CHARGE_AVG;
break;
case SOURCE_ENERGY:
full_prop = POWER_SUPPLY_PROP_ENERGY_FULL;
empty_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY;
full_design_prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN;
empty_design_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN;
now_prop = POWER_SUPPLY_PROP_ENERGY_NOW;
avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG;
break;
case SOURCE_VOLTAGE:
full_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX;
empty_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN;
full_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN;
empty_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN;
now_prop = POWER_SUPPLY_PROP_VOLTAGE_NOW;
avg_prop = POWER_SUPPLY_PROP_VOLTAGE_AVG;
break;
default:
printk(KERN_ERR "Unsupported source: %d\n", source);
return -1;
}
if (_MPSY_PROP(full_prop, &full)) {
/* if battery can't report this property, use design value */
if (_MPSY_PROP(full_design_prop, &full))
return -1;
}
if (_MPSY_PROP(avg_prop, &cur)) {
/* if battery can't report average value, use momentary */
if (_MPSY_PROP(now_prop, &cur))
return -1;
}
if (_MPSY_PROP(empty_prop, &empty)) {
/* if battery can't report this property, use design value */
if (_MPSY_PROP(empty_design_prop, &empty))
empty.intval = 0;
}
if (full.intval - empty.intval)
ret = ((cur.intval - empty.intval) * 100L) /
(full.intval - empty.intval);
else
return -1;
if (ret > 100)
return 100;
else if (ret < 0)
return 0;
return ret;
}
static void apm_battery_apm_get_power_status(struct apm_power_info *info)
{
union power_supply_propval status;
union power_supply_propval capacity, time_to_full, time_to_empty;
mutex_lock(&apm_mutex);
find_main_battery();
if (!main_battery) {
mutex_unlock(&apm_mutex);
return;
}
/* status */
if (MPSY_PROP(STATUS, &status))
status.intval = POWER_SUPPLY_STATUS_UNKNOWN;
/* ac line status */
if ((status.intval == POWER_SUPPLY_STATUS_CHARGING) ||
(status.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) ||
(status.intval == POWER_SUPPLY_STATUS_FULL))
info->ac_line_status = APM_AC_ONLINE;
else
info->ac_line_status = APM_AC_OFFLINE;
/* battery life (i.e. capacity, in percents) */
if (MPSY_PROP(CAPACITY, &capacity) == 0) {
info->battery_life = capacity.intval;
} else {
/* try calculate using energy */
info->battery_life = calculate_capacity(SOURCE_ENERGY);
/* if failed try calculate using charge instead */
if (info->battery_life == -1)
info->battery_life = calculate_capacity(SOURCE_CHARGE);
if (info->battery_life == -1)
info->battery_life = calculate_capacity(SOURCE_VOLTAGE);
}
/* charging status */
if (status.intval == POWER_SUPPLY_STATUS_CHARGING) {
info->battery_status = APM_BATTERY_STATUS_CHARGING;
} else {
if (info->battery_life > 50)
info->battery_status = APM_BATTERY_STATUS_HIGH;
else if (info->battery_life > 5)
info->battery_status = APM_BATTERY_STATUS_LOW;
else
info->battery_status = APM_BATTERY_STATUS_CRITICAL;
}
info->battery_flag = info->battery_status;
/* time */
info->units = APM_UNITS_MINS;
if (status.intval == POWER_SUPPLY_STATUS_CHARGING) {
if (!MPSY_PROP(TIME_TO_FULL_AVG, &time_to_full) ||
!MPSY_PROP(TIME_TO_FULL_NOW, &time_to_full))
info->time = time_to_full.intval / 60;
else
info->time = calculate_time(status.intval);
} else {
if (!MPSY_PROP(TIME_TO_EMPTY_AVG, &time_to_empty) ||
!MPSY_PROP(TIME_TO_EMPTY_NOW, &time_to_empty))
info->time = time_to_empty.intval / 60;
else
info->time = calculate_time(status.intval);
}
mutex_unlock(&apm_mutex);
}
static int __init apm_battery_init(void)
{
printk(KERN_INFO "APM Battery Driver\n");
apm_get_power_status = apm_battery_apm_get_power_status;
return 0;
}
static void __exit apm_battery_exit(void)
{
apm_get_power_status = NULL;
}
module_init(apm_battery_init);
module_exit(apm_battery_exit);
MODULE_AUTHOR("Eugeny Boger <[email protected]>");
MODULE_DESCRIPTION("APM emulation driver for battery monitoring class");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/apm_power.c |
// SPDX-License-Identifier: GPL-2.0+
/*
* Battery driver for Acer Iconia Tab A500.
*
* Copyright 2020 GRATE-driver project.
*
* Based on downstream driver from Acer Inc.
* Based on NVIDIA Gas Gauge driver for SBS Compliant Batteries.
*
* Copyright (c) 2010, NVIDIA Corporation.
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
enum {
REG_CAPACITY,
REG_VOLTAGE,
REG_CURRENT,
REG_DESIGN_CAPACITY,
REG_TEMPERATURE,
};
#define EC_DATA(_reg, _psp) { \
.psp = POWER_SUPPLY_PROP_ ## _psp, \
.reg = _reg, \
}
static const struct battery_register {
enum power_supply_property psp;
unsigned int reg;
} ec_data[] = {
[REG_CAPACITY] = EC_DATA(0x00, CAPACITY),
[REG_VOLTAGE] = EC_DATA(0x01, VOLTAGE_NOW),
[REG_CURRENT] = EC_DATA(0x03, CURRENT_NOW),
[REG_DESIGN_CAPACITY] = EC_DATA(0x08, CHARGE_FULL_DESIGN),
[REG_TEMPERATURE] = EC_DATA(0x0a, TEMP),
};
static const enum power_supply_property a500_battery_properties[] = {
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
};
struct a500_battery {
struct delayed_work poll_work;
struct power_supply *psy;
struct regmap *regmap;
unsigned int capacity;
};
static bool a500_battery_update_capacity(struct a500_battery *bat)
{
unsigned int capacity;
int err;
err = regmap_read(bat->regmap, ec_data[REG_CAPACITY].reg, &capacity);
if (err)
return false;
/* capacity can be >100% even if max value is 100% */
capacity = min(capacity, 100u);
if (bat->capacity != capacity) {
bat->capacity = capacity;
return true;
}
return false;
}
static int a500_battery_get_status(struct a500_battery *bat)
{
if (bat->capacity < 100) {
if (power_supply_am_i_supplied(bat->psy))
return POWER_SUPPLY_STATUS_CHARGING;
else
return POWER_SUPPLY_STATUS_DISCHARGING;
}
return POWER_SUPPLY_STATUS_FULL;
}
static void a500_battery_unit_adjustment(struct device *dev,
enum power_supply_property psp,
union power_supply_propval *val)
{
const unsigned int base_unit_conversion = 1000;
const unsigned int temp_kelvin_to_celsius = 2731;
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
case POWER_SUPPLY_PROP_CURRENT_NOW:
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval *= base_unit_conversion;
break;
case POWER_SUPPLY_PROP_TEMP:
val->intval -= temp_kelvin_to_celsius;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = !!val->intval;
break;
default:
dev_dbg(dev,
"%s: no need for unit conversion %d\n", __func__, psp);
}
}
static int a500_battery_get_ec_data_index(struct device *dev,
enum power_supply_property psp)
{
unsigned int i;
/*
* DESIGN_CAPACITY register always returns a non-zero value if
* battery is connected and zero if disconnected, hence we'll use
* it for judging the battery presence.
*/
if (psp == POWER_SUPPLY_PROP_PRESENT)
psp = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN;
for (i = 0; i < ARRAY_SIZE(ec_data); i++)
if (psp == ec_data[i].psp)
return i;
dev_dbg(dev, "%s: invalid property %u\n", __func__, psp);
return -EINVAL;
}
static int a500_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct a500_battery *bat = power_supply_get_drvdata(psy);
struct device *dev = psy->dev.parent;
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
val->intval = a500_battery_get_status(bat);
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
break;
case POWER_SUPPLY_PROP_CAPACITY:
a500_battery_update_capacity(bat);
val->intval = bat->capacity;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
case POWER_SUPPLY_PROP_CURRENT_NOW:
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
case POWER_SUPPLY_PROP_PRESENT:
case POWER_SUPPLY_PROP_TEMP:
ret = a500_battery_get_ec_data_index(dev, psp);
if (ret < 0)
break;
ret = regmap_read(bat->regmap, ec_data[ret].reg, &val->intval);
break;
default:
dev_err(dev, "%s: invalid property %u\n", __func__, psp);
return -EINVAL;
}
if (!ret) {
/* convert units to match requirements of power supply class */
a500_battery_unit_adjustment(dev, psp, val);
}
dev_dbg(dev, "%s: property = %d, value = %x\n",
__func__, psp, val->intval);
/* return NODATA for properties if battery not presents */
if (ret)
return -ENODATA;
return 0;
}
static void a500_battery_poll_work(struct work_struct *work)
{
struct a500_battery *bat;
bool capacity_changed;
bat = container_of(work, struct a500_battery, poll_work.work);
capacity_changed = a500_battery_update_capacity(bat);
if (capacity_changed)
power_supply_changed(bat->psy);
/* continuously send uevent notification */
schedule_delayed_work(&bat->poll_work, 30 * HZ);
}
static const struct power_supply_desc a500_battery_desc = {
.name = "ec-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = a500_battery_properties,
.get_property = a500_battery_get_property,
.num_properties = ARRAY_SIZE(a500_battery_properties),
.external_power_changed = power_supply_changed,
};
static int a500_battery_probe(struct platform_device *pdev)
{
struct power_supply_config psy_cfg = {};
struct a500_battery *bat;
bat = devm_kzalloc(&pdev->dev, sizeof(*bat), GFP_KERNEL);
if (!bat)
return -ENOMEM;
platform_set_drvdata(pdev, bat);
psy_cfg.of_node = pdev->dev.parent->of_node;
psy_cfg.drv_data = bat;
bat->regmap = dev_get_regmap(pdev->dev.parent, "KB930");
if (!bat->regmap)
return -EINVAL;
bat->psy = devm_power_supply_register_no_ws(&pdev->dev,
&a500_battery_desc,
&psy_cfg);
if (IS_ERR(bat->psy))
return dev_err_probe(&pdev->dev, PTR_ERR(bat->psy),
"failed to register battery\n");
INIT_DELAYED_WORK(&bat->poll_work, a500_battery_poll_work);
schedule_delayed_work(&bat->poll_work, HZ);
return 0;
}
static int a500_battery_remove(struct platform_device *pdev)
{
struct a500_battery *bat = dev_get_drvdata(&pdev->dev);
cancel_delayed_work_sync(&bat->poll_work);
return 0;
}
static int __maybe_unused a500_battery_suspend(struct device *dev)
{
struct a500_battery *bat = dev_get_drvdata(dev);
cancel_delayed_work_sync(&bat->poll_work);
return 0;
}
static int __maybe_unused a500_battery_resume(struct device *dev)
{
struct a500_battery *bat = dev_get_drvdata(dev);
schedule_delayed_work(&bat->poll_work, HZ);
return 0;
}
static SIMPLE_DEV_PM_OPS(a500_battery_pm_ops,
a500_battery_suspend, a500_battery_resume);
static struct platform_driver a500_battery_driver = {
.driver = {
.name = "acer-a500-iconia-battery",
.pm = &a500_battery_pm_ops,
},
.probe = a500_battery_probe,
.remove = a500_battery_remove,
};
module_platform_driver(a500_battery_driver);
MODULE_DESCRIPTION("Battery gauge driver for Acer Iconia Tab A500");
MODULE_AUTHOR("Dmitry Osipenko <[email protected]>");
MODULE_ALIAS("platform:acer-a500-iconia-battery");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/acer_a500_battery.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Battery driver for Marvell 88PM860x PMIC
*
* Copyright (c) 2012 Marvell International Ltd.
* Author: Jett Zhou <[email protected]>
* Haojian Zhuang <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/string.h>
#include <linux/power_supply.h>
#include <linux/mfd/88pm860x.h>
#include <linux/delay.h>
/* bit definitions of Status Query Interface 2 */
#define STATUS2_CHG (1 << 2)
#define STATUS2_BAT (1 << 3)
#define STATUS2_VBUS (1 << 4)
/* bit definitions of Measurement Enable 1 Register */
#define MEAS1_TINT (1 << 3)
#define MEAS1_GP1 (1 << 5)
/* bit definitions of Measurement Enable 3 Register */
#define MEAS3_IBAT (1 << 0)
#define MEAS3_BAT_DET (1 << 1)
#define MEAS3_CC (1 << 2)
/* bit definitions of Measurement Off Time Register */
#define MEAS_OFF_SLEEP_EN (1 << 1)
/* bit definitions of GPADC Bias Current 2 Register */
#define GPBIAS2_GPADC1_SET (2 << 4)
/* GPADC1 Bias Current value in uA unit */
#define GPBIAS2_GPADC1_UA ((GPBIAS2_GPADC1_SET >> 4) * 5 + 1)
/* bit definitions of GPADC Misc 1 Register */
#define GPMISC1_GPADC_EN (1 << 0)
/* bit definitions of Charger Control 6 Register */
#define CC6_BAT_DET_GPADC1 1
/* bit definitions of Coulomb Counter Reading Register */
#define CCNT_AVG_SEL (4 << 3)
/* bit definitions of RTC miscellaneous Register1 */
#define RTC_SOC_5LSB (0x1F << 3)
/* bit definitions of RTC Register1 */
#define RTC_SOC_3MSB (0x7)
/* bit definitions of Power up Log register */
#define BAT_WU_LOG (1<<6)
/* coulomb counter index */
#define CCNT_POS1 0
#define CCNT_POS2 1
#define CCNT_NEG1 2
#define CCNT_NEG2 3
#define CCNT_SPOS 4
#define CCNT_SNEG 5
/* OCV -- Open Circuit Voltage */
#define OCV_MODE_ACTIVE 0
#define OCV_MODE_SLEEP 1
/* Vbat range of CC for measuring Rbat */
#define LOW_BAT_THRESHOLD 3600
#define VBATT_RESISTOR_MIN 3800
#define VBATT_RESISTOR_MAX 4100
/* TBAT for batt, TINT for chip itself */
#define PM860X_TEMP_TINT (0)
#define PM860X_TEMP_TBAT (1)
/*
* Battery temperature based on NTC resistor, defined
* corresponding resistor value -- Ohm / C degeree.
*/
#define TBAT_NEG_25D 127773 /* -25 */
#define TBAT_NEG_10D 54564 /* -10 */
#define TBAT_0D 32330 /* 0 */
#define TBAT_10D 19785 /* 10 */
#define TBAT_20D 12468 /* 20 */
#define TBAT_30D 8072 /* 30 */
#define TBAT_40D 5356 /* 40 */
struct pm860x_battery_info {
struct pm860x_chip *chip;
struct i2c_client *i2c;
struct device *dev;
struct power_supply *battery;
struct mutex lock;
int status;
int irq_cc;
int irq_batt;
int max_capacity;
int resistor; /* Battery Internal Resistor */
int last_capacity;
int start_soc;
unsigned present:1;
unsigned temp_type:1; /* TINT or TBAT */
};
struct ccnt {
unsigned long long pos;
unsigned long long neg;
unsigned int spos;
unsigned int sneg;
int total_chg; /* mAh(3.6C) */
int total_dischg; /* mAh(3.6C) */
};
/*
* State of Charge.
* The first number is mAh(=3.6C), and the second number is percent point.
*/
static int array_soc[][2] = {
{4170, 100}, {4154, 99}, {4136, 98}, {4122, 97}, {4107, 96},
{4102, 95}, {4088, 94}, {4081, 93}, {4070, 92}, {4060, 91},
{4053, 90}, {4044, 89}, {4035, 88}, {4028, 87}, {4019, 86},
{4013, 85}, {4006, 84}, {3995, 83}, {3987, 82}, {3982, 81},
{3976, 80}, {3968, 79}, {3962, 78}, {3954, 77}, {3946, 76},
{3941, 75}, {3934, 74}, {3929, 73}, {3922, 72}, {3916, 71},
{3910, 70}, {3904, 69}, {3898, 68}, {3892, 67}, {3887, 66},
{3880, 65}, {3874, 64}, {3868, 63}, {3862, 62}, {3854, 61},
{3849, 60}, {3843, 59}, {3840, 58}, {3833, 57}, {3829, 56},
{3824, 55}, {3818, 54}, {3815, 53}, {3810, 52}, {3808, 51},
{3804, 50}, {3801, 49}, {3798, 48}, {3796, 47}, {3792, 46},
{3789, 45}, {3785, 44}, {3784, 43}, {3782, 42}, {3780, 41},
{3777, 40}, {3776, 39}, {3774, 38}, {3772, 37}, {3771, 36},
{3769, 35}, {3768, 34}, {3764, 33}, {3763, 32}, {3760, 31},
{3760, 30}, {3754, 29}, {3750, 28}, {3749, 27}, {3744, 26},
{3740, 25}, {3734, 24}, {3732, 23}, {3728, 22}, {3726, 21},
{3720, 20}, {3716, 19}, {3709, 18}, {3703, 17}, {3698, 16},
{3692, 15}, {3683, 14}, {3675, 13}, {3670, 12}, {3665, 11},
{3661, 10}, {3649, 9}, {3637, 8}, {3622, 7}, {3609, 6},
{3580, 5}, {3558, 4}, {3540, 3}, {3510, 2}, {3429, 1},
};
static struct ccnt ccnt_data;
/*
* register 1 bit[7:0] -- bit[11:4] of measured value of voltage
* register 0 bit[3:0] -- bit[3:0] of measured value of voltage
*/
static int measure_12bit_voltage(struct pm860x_battery_info *info,
int offset, int *data)
{
unsigned char buf[2];
int ret;
ret = pm860x_bulk_read(info->i2c, offset, 2, buf);
if (ret < 0)
return ret;
*data = ((buf[0] & 0xff) << 4) | (buf[1] & 0x0f);
/* V_MEAS(mV) = data * 1.8 * 1000 / (2^12) */
*data = ((*data & 0xfff) * 9 * 25) >> 9;
return 0;
}
static int measure_vbatt(struct pm860x_battery_info *info, int state,
int *data)
{
unsigned char buf[5];
int ret;
switch (state) {
case OCV_MODE_ACTIVE:
ret = measure_12bit_voltage(info, PM8607_VBAT_MEAS1, data);
if (ret)
return ret;
/* V_BATT_MEAS(mV) = value * 3 * 1.8 * 1000 / (2^12) */
*data *= 3;
break;
case OCV_MODE_SLEEP:
/*
* voltage value of VBATT in sleep mode is saved in different
* registers.
* bit[11:10] -- bit[7:6] of LDO9(0x18)
* bit[9:8] -- bit[7:6] of LDO8(0x17)
* bit[7:6] -- bit[7:6] of LDO7(0x16)
* bit[5:4] -- bit[7:6] of LDO6(0x15)
* bit[3:0] -- bit[7:4] of LDO5(0x14)
*/
ret = pm860x_bulk_read(info->i2c, PM8607_LDO5, 5, buf);
if (ret < 0)
return ret;
ret = ((buf[4] >> 6) << 10) | ((buf[3] >> 6) << 8)
| ((buf[2] >> 6) << 6) | ((buf[1] >> 6) << 4)
| (buf[0] >> 4);
/* V_BATT_MEAS(mV) = data * 3 * 1.8 * 1000 / (2^12) */
*data = ((*data & 0xff) * 27 * 25) >> 9;
break;
default:
return -EINVAL;
}
return 0;
}
/*
* Return value is signed data.
* Negative value means discharging, and positive value means charging.
*/
static int measure_current(struct pm860x_battery_info *info, int *data)
{
unsigned char buf[2];
short s;
int ret;
ret = pm860x_bulk_read(info->i2c, PM8607_IBAT_MEAS1, 2, buf);
if (ret < 0)
return ret;
s = ((buf[0] & 0xff) << 8) | (buf[1] & 0xff);
/* current(mA) = value * 0.125 */
*data = s >> 3;
return 0;
}
static int set_charger_current(struct pm860x_battery_info *info, int data,
int *old)
{
int ret;
if (data < 50 || data > 1600 || !old)
return -EINVAL;
data = ((data - 50) / 50) & 0x1f;
*old = pm860x_reg_read(info->i2c, PM8607_CHG_CTRL2);
*old = (*old & 0x1f) * 50 + 50;
ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL2, 0x1f, data);
if (ret < 0)
return ret;
return 0;
}
static int read_ccnt(struct pm860x_battery_info *info, int offset,
int *ccnt)
{
unsigned char buf[2];
int ret;
ret = pm860x_set_bits(info->i2c, PM8607_CCNT, 7, offset & 7);
if (ret < 0)
goto out;
ret = pm860x_bulk_read(info->i2c, PM8607_CCNT_MEAS1, 2, buf);
if (ret < 0)
goto out;
*ccnt = ((buf[0] & 0xff) << 8) | (buf[1] & 0xff);
return 0;
out:
return ret;
}
static int calc_ccnt(struct pm860x_battery_info *info, struct ccnt *ccnt)
{
unsigned int sum;
int ret;
int data;
ret = read_ccnt(info, CCNT_POS1, &data);
if (ret)
goto out;
sum = data & 0xffff;
ret = read_ccnt(info, CCNT_POS2, &data);
if (ret)
goto out;
sum |= (data & 0xffff) << 16;
ccnt->pos += sum;
ret = read_ccnt(info, CCNT_NEG1, &data);
if (ret)
goto out;
sum = data & 0xffff;
ret = read_ccnt(info, CCNT_NEG2, &data);
if (ret)
goto out;
sum |= (data & 0xffff) << 16;
sum = ~sum + 1; /* since it's negative */
ccnt->neg += sum;
ret = read_ccnt(info, CCNT_SPOS, &data);
if (ret)
goto out;
ccnt->spos += data;
ret = read_ccnt(info, CCNT_SNEG, &data);
if (ret)
goto out;
/*
* charge(mAh) = count * 1.6984 * 1e(-8)
* = count * 16984 * 1.024 * 1.024 * 1.024 / (2 ^ 40)
* = count * 18236 / (2 ^ 40)
*/
ccnt->total_chg = (int) ((ccnt->pos * 18236) >> 40);
ccnt->total_dischg = (int) ((ccnt->neg * 18236) >> 40);
return 0;
out:
return ret;
}
static int clear_ccnt(struct pm860x_battery_info *info, struct ccnt *ccnt)
{
int data;
memset(ccnt, 0, sizeof(*ccnt));
/* read to clear ccnt */
read_ccnt(info, CCNT_POS1, &data);
read_ccnt(info, CCNT_POS2, &data);
read_ccnt(info, CCNT_NEG1, &data);
read_ccnt(info, CCNT_NEG2, &data);
read_ccnt(info, CCNT_SPOS, &data);
read_ccnt(info, CCNT_SNEG, &data);
return 0;
}
/* Calculate Open Circuit Voltage */
static int calc_ocv(struct pm860x_battery_info *info, int *ocv)
{
int ret;
int i;
int data;
int vbatt_avg;
int vbatt_sum;
int ibatt_avg;
int ibatt_sum;
if (!ocv)
return -EINVAL;
for (i = 0, ibatt_sum = 0, vbatt_sum = 0; i < 10; i++) {
ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data);
if (ret)
goto out;
vbatt_sum += data;
ret = measure_current(info, &data);
if (ret)
goto out;
ibatt_sum += data;
}
vbatt_avg = vbatt_sum / 10;
ibatt_avg = ibatt_sum / 10;
mutex_lock(&info->lock);
if (info->present)
*ocv = vbatt_avg - ibatt_avg * info->resistor / 1000;
else
*ocv = vbatt_avg;
mutex_unlock(&info->lock);
dev_dbg(info->dev, "VBAT average:%d, OCV:%d\n", vbatt_avg, *ocv);
return 0;
out:
return ret;
}
/* Calculate State of Charge (percent points) */
static int calc_soc(struct pm860x_battery_info *info, int state, int *soc)
{
int i;
int ocv;
int count;
int ret = -EINVAL;
if (!soc)
return -EINVAL;
switch (state) {
case OCV_MODE_ACTIVE:
ret = calc_ocv(info, &ocv);
break;
case OCV_MODE_SLEEP:
ret = measure_vbatt(info, OCV_MODE_SLEEP, &ocv);
break;
}
if (ret)
return ret;
count = ARRAY_SIZE(array_soc);
if (ocv < array_soc[count - 1][0]) {
*soc = 0;
return 0;
}
for (i = 0; i < count; i++) {
if (ocv >= array_soc[i][0]) {
*soc = array_soc[i][1];
break;
}
}
return 0;
}
static irqreturn_t pm860x_coulomb_handler(int irq, void *data)
{
struct pm860x_battery_info *info = data;
calc_ccnt(info, &ccnt_data);
return IRQ_HANDLED;
}
static irqreturn_t pm860x_batt_handler(int irq, void *data)
{
struct pm860x_battery_info *info = data;
int ret;
mutex_lock(&info->lock);
ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
if (ret & STATUS2_BAT) {
info->present = 1;
info->temp_type = PM860X_TEMP_TBAT;
} else {
info->present = 0;
info->temp_type = PM860X_TEMP_TINT;
}
mutex_unlock(&info->lock);
/* clear ccnt since battery is attached or dettached */
clear_ccnt(info, &ccnt_data);
return IRQ_HANDLED;
}
static void pm860x_init_battery(struct pm860x_battery_info *info)
{
unsigned char buf[2];
int ret;
int data;
int bat_remove;
int soc = 0;
/* measure enable on GPADC1 */
data = MEAS1_GP1;
if (info->temp_type == PM860X_TEMP_TINT)
data |= MEAS1_TINT;
ret = pm860x_set_bits(info->i2c, PM8607_MEAS_EN1, data, data);
if (ret)
goto out;
/* measure enable on IBAT, BAT_DET, CC. IBAT is depend on CC. */
data = MEAS3_IBAT | MEAS3_BAT_DET | MEAS3_CC;
ret = pm860x_set_bits(info->i2c, PM8607_MEAS_EN3, data, data);
if (ret)
goto out;
/* measure disable CC in sleep time */
ret = pm860x_reg_write(info->i2c, PM8607_MEAS_OFF_TIME1, 0x82);
if (ret)
goto out;
ret = pm860x_reg_write(info->i2c, PM8607_MEAS_OFF_TIME2, 0x6c);
if (ret)
goto out;
/* enable GPADC */
ret = pm860x_set_bits(info->i2c, PM8607_GPADC_MISC1,
GPMISC1_GPADC_EN, GPMISC1_GPADC_EN);
if (ret < 0)
goto out;
/* detect battery via GPADC1 */
ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL6,
CC6_BAT_DET_GPADC1, CC6_BAT_DET_GPADC1);
if (ret < 0)
goto out;
ret = pm860x_set_bits(info->i2c, PM8607_CCNT, 7 << 3,
CCNT_AVG_SEL);
if (ret < 0)
goto out;
/* set GPADC1 bias */
ret = pm860x_set_bits(info->i2c, PM8607_GP_BIAS2, 0xF << 4,
GPBIAS2_GPADC1_SET);
if (ret < 0)
goto out;
/* check whether battery present) */
mutex_lock(&info->lock);
ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
if (ret < 0) {
mutex_unlock(&info->lock);
goto out;
}
if (ret & STATUS2_BAT) {
info->present = 1;
info->temp_type = PM860X_TEMP_TBAT;
} else {
info->present = 0;
info->temp_type = PM860X_TEMP_TINT;
}
mutex_unlock(&info->lock);
ret = calc_soc(info, OCV_MODE_ACTIVE, &soc);
if (ret < 0)
goto out;
data = pm860x_reg_read(info->i2c, PM8607_POWER_UP_LOG);
bat_remove = data & BAT_WU_LOG;
dev_dbg(info->dev, "battery wake up? %s\n",
bat_remove != 0 ? "yes" : "no");
/* restore SOC from RTC domain register */
if (bat_remove == 0) {
buf[0] = pm860x_reg_read(info->i2c, PM8607_RTC_MISC2);
buf[1] = pm860x_reg_read(info->i2c, PM8607_RTC1);
data = ((buf[1] & 0x3) << 5) | ((buf[0] >> 3) & 0x1F);
if (data > soc + 15)
info->start_soc = soc;
else if (data < soc - 15)
info->start_soc = soc;
else
info->start_soc = data;
dev_dbg(info->dev, "soc_rtc %d, soc_ocv :%d\n", data, soc);
} else {
pm860x_set_bits(info->i2c, PM8607_POWER_UP_LOG,
BAT_WU_LOG, BAT_WU_LOG);
info->start_soc = soc;
}
info->last_capacity = info->start_soc;
dev_dbg(info->dev, "init soc : %d\n", info->last_capacity);
out:
return;
}
static void set_temp_threshold(struct pm860x_battery_info *info,
int min, int max)
{
int data;
/* (tmp << 8) / 1800 */
if (min <= 0)
data = 0;
else
data = (min << 8) / 1800;
pm860x_reg_write(info->i2c, PM8607_GPADC1_HIGHTH, data);
dev_dbg(info->dev, "TEMP_HIGHTH : min: %d, 0x%x\n", min, data);
if (max <= 0)
data = 0xff;
else
data = (max << 8) / 1800;
pm860x_reg_write(info->i2c, PM8607_GPADC1_LOWTH, data);
dev_dbg(info->dev, "TEMP_LOWTH:max : %d, 0x%x\n", max, data);
}
static int measure_temp(struct pm860x_battery_info *info, int *data)
{
int ret;
int temp;
int min;
int max;
if (info->temp_type == PM860X_TEMP_TINT) {
ret = measure_12bit_voltage(info, PM8607_TINT_MEAS1, data);
if (ret)
return ret;
*data = (*data - 884) * 1000 / 3611;
} else {
ret = measure_12bit_voltage(info, PM8607_GPADC1_MEAS1, data);
if (ret)
return ret;
/* meausered Vtbat(mV) / Ibias_current(11uA)*/
*data = (*data * 1000) / GPBIAS2_GPADC1_UA;
if (*data > TBAT_NEG_25D) {
temp = -30; /* over cold , suppose -30 roughly */
max = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000;
set_temp_threshold(info, 0, max);
} else if (*data > TBAT_NEG_10D) {
temp = -15; /* -15 degree, code */
max = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000;
set_temp_threshold(info, 0, max);
} else if (*data > TBAT_0D) {
temp = -5; /* -5 degree */
min = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000;
max = TBAT_40D * GPBIAS2_GPADC1_UA / 1000;
set_temp_threshold(info, min, max);
} else if (*data > TBAT_10D) {
temp = 5; /* in range of (0, 10) */
min = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000;
max = TBAT_40D * GPBIAS2_GPADC1_UA / 1000;
set_temp_threshold(info, min, max);
} else if (*data > TBAT_20D) {
temp = 15; /* in range of (10, 20) */
min = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000;
max = TBAT_40D * GPBIAS2_GPADC1_UA / 1000;
set_temp_threshold(info, min, max);
} else if (*data > TBAT_30D) {
temp = 25; /* in range of (20, 30) */
min = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000;
max = TBAT_40D * GPBIAS2_GPADC1_UA / 1000;
set_temp_threshold(info, min, max);
} else if (*data > TBAT_40D) {
temp = 35; /* in range of (30, 40) */
min = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000;
max = TBAT_40D * GPBIAS2_GPADC1_UA / 1000;
set_temp_threshold(info, min, max);
} else {
min = TBAT_40D * GPBIAS2_GPADC1_UA / 1000;
set_temp_threshold(info, min, 0);
temp = 45; /* over heat ,suppose 45 roughly */
}
dev_dbg(info->dev, "temp_C:%d C,temp_mv:%d mv\n", temp, *data);
*data = temp;
}
return 0;
}
static int calc_resistor(struct pm860x_battery_info *info)
{
int vbatt_sum1;
int vbatt_sum2;
int chg_current;
int ibatt_sum1;
int ibatt_sum2;
int data;
int ret;
int i;
ret = measure_current(info, &data);
/* make sure that charging is launched by data > 0 */
if (ret || data < 0)
goto out;
ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data);
if (ret)
goto out;
/* calculate resistor only in CC charge mode */
if (data < VBATT_RESISTOR_MIN || data > VBATT_RESISTOR_MAX)
goto out;
/* current is saved */
if (set_charger_current(info, 500, &chg_current))
goto out;
/*
* set charge current as 500mA, wait about 500ms till charging
* process is launched and stable with the newer charging current.
*/
msleep(500);
for (i = 0, vbatt_sum1 = 0, ibatt_sum1 = 0; i < 10; i++) {
ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data);
if (ret)
goto out_meas;
vbatt_sum1 += data;
ret = measure_current(info, &data);
if (ret)
goto out_meas;
if (data < 0)
ibatt_sum1 = ibatt_sum1 - data; /* discharging */
else
ibatt_sum1 = ibatt_sum1 + data; /* charging */
}
if (set_charger_current(info, 100, &ret))
goto out_meas;
/*
* set charge current as 100mA, wait about 500ms till charging
* process is launched and stable with the newer charging current.
*/
msleep(500);
for (i = 0, vbatt_sum2 = 0, ibatt_sum2 = 0; i < 10; i++) {
ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data);
if (ret)
goto out_meas;
vbatt_sum2 += data;
ret = measure_current(info, &data);
if (ret)
goto out_meas;
if (data < 0)
ibatt_sum2 = ibatt_sum2 - data; /* discharging */
else
ibatt_sum2 = ibatt_sum2 + data; /* charging */
}
/* restore current setting */
if (set_charger_current(info, chg_current, &ret))
goto out_meas;
if ((vbatt_sum1 > vbatt_sum2) && (ibatt_sum1 > ibatt_sum2) &&
(ibatt_sum2 > 0)) {
/* calculate resistor in discharging case */
data = 1000 * (vbatt_sum1 - vbatt_sum2)
/ (ibatt_sum1 - ibatt_sum2);
if ((data - info->resistor > 0) &&
(data - info->resistor < info->resistor))
info->resistor = data;
if ((info->resistor - data > 0) &&
(info->resistor - data < data))
info->resistor = data;
}
return 0;
out_meas:
set_charger_current(info, chg_current, &ret);
out:
return -EINVAL;
}
static int calc_capacity(struct pm860x_battery_info *info, int *cap)
{
int ret;
int data;
int ibat;
int cap_ocv = 0;
int cap_cc = 0;
ret = calc_ccnt(info, &ccnt_data);
if (ret)
goto out;
soc:
data = info->max_capacity * info->start_soc / 100;
if (ccnt_data.total_dischg - ccnt_data.total_chg <= data) {
cap_cc =
data + ccnt_data.total_chg - ccnt_data.total_dischg;
} else {
clear_ccnt(info, &ccnt_data);
calc_soc(info, OCV_MODE_ACTIVE, &info->start_soc);
dev_dbg(info->dev, "restart soc = %d !\n",
info->start_soc);
goto soc;
}
cap_cc = cap_cc * 100 / info->max_capacity;
if (cap_cc < 0)
cap_cc = 0;
else if (cap_cc > 100)
cap_cc = 100;
dev_dbg(info->dev, "%s, last cap : %d", __func__,
info->last_capacity);
ret = measure_current(info, &ibat);
if (ret)
goto out;
/* Calculate the capacity when discharging(ibat < 0) */
if (ibat < 0) {
ret = calc_soc(info, OCV_MODE_ACTIVE, &cap_ocv);
if (ret)
cap_ocv = info->last_capacity;
ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data);
if (ret)
goto out;
if (data <= LOW_BAT_THRESHOLD) {
/* choose the lower capacity value to report
* between vbat and CC when vbat < 3.6v;
* than 3.6v;
*/
*cap = min(cap_ocv, cap_cc);
} else {
/* when detect vbat > 3.6v, but cap_cc < 15,and
* cap_ocv is 10% larger than cap_cc, we can think
* CC have some accumulation error, switch to OCV
* to estimate capacity;
* */
if (cap_cc < 15 && cap_ocv - cap_cc > 10)
*cap = cap_ocv;
else
*cap = cap_cc;
}
/* when discharging, make sure current capacity
* is lower than last*/
if (*cap > info->last_capacity)
*cap = info->last_capacity;
} else {
*cap = cap_cc;
}
info->last_capacity = *cap;
dev_dbg(info->dev, "%s, cap_ocv:%d cap_cc:%d, cap:%d\n",
(ibat < 0) ? "discharging" : "charging",
cap_ocv, cap_cc, *cap);
/*
* store the current capacity to RTC domain register,
* after next power up , it will be restored.
*/
pm860x_set_bits(info->i2c, PM8607_RTC_MISC2, RTC_SOC_5LSB,
(*cap & 0x1F) << 3);
pm860x_set_bits(info->i2c, PM8607_RTC1, RTC_SOC_3MSB,
((*cap >> 5) & 0x3));
return 0;
out:
return ret;
}
static void pm860x_external_power_changed(struct power_supply *psy)
{
struct pm860x_battery_info *info = dev_get_drvdata(psy->dev.parent);
calc_resistor(info);
}
static int pm860x_batt_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct pm860x_battery_info *info = dev_get_drvdata(psy->dev.parent);
int data;
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_PRESENT:
val->intval = info->present;
break;
case POWER_SUPPLY_PROP_CAPACITY:
ret = calc_capacity(info, &data);
if (ret)
return ret;
if (data < 0)
data = 0;
else if (data > 100)
data = 100;
/* return 100 if battery is not attached */
if (!info->present)
data = 100;
val->intval = data;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
/* return real vbatt Voltage */
ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data);
if (ret)
return ret;
val->intval = data * 1000;
break;
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
/* return Open Circuit Voltage (not measured voltage) */
ret = calc_ocv(info, &data);
if (ret)
return ret;
val->intval = data * 1000;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = measure_current(info, &data);
if (ret)
return ret;
val->intval = data;
break;
case POWER_SUPPLY_PROP_TEMP:
if (info->present) {
ret = measure_temp(info, &data);
if (ret)
return ret;
data *= 10;
} else {
/* Fake Temp 25C Without Battery */
data = 250;
}
val->intval = data;
break;
default:
return -ENODEV;
}
return 0;
}
static int pm860x_batt_set_prop(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct pm860x_battery_info *info = dev_get_drvdata(psy->dev.parent);
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_FULL:
clear_ccnt(info, &ccnt_data);
info->start_soc = 100;
dev_dbg(info->dev, "chg done, update soc = %d\n",
info->start_soc);
break;
default:
return -EPERM;
}
return 0;
}
static enum power_supply_property pm860x_batt_props[] = {
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_TEMP,
};
static const struct power_supply_desc pm860x_battery_desc = {
.name = "battery-monitor",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = pm860x_batt_props,
.num_properties = ARRAY_SIZE(pm860x_batt_props),
.get_property = pm860x_batt_get_prop,
.set_property = pm860x_batt_set_prop,
.external_power_changed = pm860x_external_power_changed,
};
static int pm860x_battery_probe(struct platform_device *pdev)
{
struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
struct pm860x_battery_info *info;
struct pm860x_power_pdata *pdata;
int ret;
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->irq_cc = platform_get_irq(pdev, 0);
if (info->irq_cc <= 0)
return -EINVAL;
info->irq_batt = platform_get_irq(pdev, 1);
if (info->irq_batt <= 0)
return -EINVAL;
info->chip = chip;
info->i2c =
(chip->id == CHIP_PM8607) ? chip->client : chip->companion;
info->dev = &pdev->dev;
info->status = POWER_SUPPLY_STATUS_UNKNOWN;
pdata = pdev->dev.platform_data;
mutex_init(&info->lock);
platform_set_drvdata(pdev, info);
pm860x_init_battery(info);
if (pdata && pdata->max_capacity)
info->max_capacity = pdata->max_capacity;
else
info->max_capacity = 1500; /* set default capacity */
if (pdata && pdata->resistor)
info->resistor = pdata->resistor;
else
info->resistor = 300; /* set default internal resistor */
info->battery = devm_power_supply_register(&pdev->dev,
&pm860x_battery_desc,
NULL);
if (IS_ERR(info->battery))
return PTR_ERR(info->battery);
info->battery->dev.parent = &pdev->dev;
ret = devm_request_threaded_irq(chip->dev, info->irq_cc, NULL,
pm860x_coulomb_handler, IRQF_ONESHOT,
"coulomb", info);
if (ret < 0) {
dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
info->irq_cc, ret);
return ret;
}
ret = devm_request_threaded_irq(chip->dev, info->irq_batt, NULL,
pm860x_batt_handler,
IRQF_ONESHOT, "battery", info);
if (ret < 0) {
dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
info->irq_batt, ret);
return ret;
}
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int pm860x_battery_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
if (device_may_wakeup(dev))
chip->wakeup_flag |= 1 << PM8607_IRQ_CC;
return 0;
}
static int pm860x_battery_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
if (device_may_wakeup(dev))
chip->wakeup_flag &= ~(1 << PM8607_IRQ_CC);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(pm860x_battery_pm_ops,
pm860x_battery_suspend, pm860x_battery_resume);
static struct platform_driver pm860x_battery_driver = {
.driver = {
.name = "88pm860x-battery",
.pm = &pm860x_battery_pm_ops,
},
.probe = pm860x_battery_probe,
};
module_platform_driver(pm860x_battery_driver);
MODULE_DESCRIPTION("Marvell 88PM860x Battery driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/88pm860x_battery.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Battery charger driver for TI's tps65090
*
* Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/freezer.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
#include <linux/mfd/tps65090.h>
#define TPS65090_CHARGER_ENABLE BIT(0)
#define TPS65090_VACG BIT(1)
#define TPS65090_NOITERM BIT(5)
#define POLL_INTERVAL (HZ * 2) /* Used when no irq */
struct tps65090_charger {
struct device *dev;
int ac_online;
int prev_ac_online;
int irq;
struct task_struct *poll_task;
bool passive_mode;
struct power_supply *ac;
struct tps65090_platform_data *pdata;
};
static enum power_supply_property tps65090_ac_props[] = {
POWER_SUPPLY_PROP_ONLINE,
};
static int tps65090_low_chrg_current(struct tps65090_charger *charger)
{
int ret;
if (charger->passive_mode)
return 0;
ret = tps65090_write(charger->dev->parent, TPS65090_REG_CG_CTRL5,
TPS65090_NOITERM);
if (ret < 0) {
dev_err(charger->dev, "%s(): error reading in register 0x%x\n",
__func__, TPS65090_REG_CG_CTRL5);
return ret;
}
return 0;
}
static int tps65090_enable_charging(struct tps65090_charger *charger)
{
int ret;
uint8_t ctrl0 = 0;
if (charger->passive_mode)
return 0;
ret = tps65090_read(charger->dev->parent, TPS65090_REG_CG_CTRL0,
&ctrl0);
if (ret < 0) {
dev_err(charger->dev, "%s(): error reading in register 0x%x\n",
__func__, TPS65090_REG_CG_CTRL0);
return ret;
}
ret = tps65090_write(charger->dev->parent, TPS65090_REG_CG_CTRL0,
(ctrl0 | TPS65090_CHARGER_ENABLE));
if (ret < 0) {
dev_err(charger->dev, "%s(): error writing in register 0x%x\n",
__func__, TPS65090_REG_CG_CTRL0);
return ret;
}
return 0;
}
static int tps65090_config_charger(struct tps65090_charger *charger)
{
uint8_t intrmask = 0;
int ret;
if (charger->passive_mode)
return 0;
if (charger->pdata->enable_low_current_chrg) {
ret = tps65090_low_chrg_current(charger);
if (ret < 0) {
dev_err(charger->dev,
"error configuring low charge current\n");
return ret;
}
}
/* Enable the VACG interrupt for AC power detect */
ret = tps65090_read(charger->dev->parent, TPS65090_REG_INTR_MASK,
&intrmask);
if (ret < 0) {
dev_err(charger->dev, "%s(): error reading in register 0x%x\n",
__func__, TPS65090_REG_INTR_MASK);
return ret;
}
ret = tps65090_write(charger->dev->parent, TPS65090_REG_INTR_MASK,
(intrmask | TPS65090_VACG));
if (ret < 0) {
dev_err(charger->dev, "%s(): error writing in register 0x%x\n",
__func__, TPS65090_REG_CG_CTRL0);
return ret;
}
return 0;
}
static int tps65090_ac_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct tps65090_charger *charger = power_supply_get_drvdata(psy);
if (psp == POWER_SUPPLY_PROP_ONLINE) {
val->intval = charger->ac_online;
charger->prev_ac_online = charger->ac_online;
return 0;
}
return -EINVAL;
}
static irqreturn_t tps65090_charger_isr(int irq, void *dev_id)
{
struct tps65090_charger *charger = dev_id;
int ret;
uint8_t status1 = 0;
uint8_t intrsts = 0;
ret = tps65090_read(charger->dev->parent, TPS65090_REG_CG_STATUS1,
&status1);
if (ret < 0) {
dev_err(charger->dev, "%s(): Error in reading reg 0x%x\n",
__func__, TPS65090_REG_CG_STATUS1);
return IRQ_HANDLED;
}
msleep(75);
ret = tps65090_read(charger->dev->parent, TPS65090_REG_INTR_STS,
&intrsts);
if (ret < 0) {
dev_err(charger->dev, "%s(): Error in reading reg 0x%x\n",
__func__, TPS65090_REG_INTR_STS);
return IRQ_HANDLED;
}
if (intrsts & TPS65090_VACG) {
ret = tps65090_enable_charging(charger);
if (ret < 0)
return IRQ_HANDLED;
charger->ac_online = 1;
} else {
charger->ac_online = 0;
}
/* Clear interrupts. */
if (!charger->passive_mode) {
ret = tps65090_write(charger->dev->parent,
TPS65090_REG_INTR_STS, 0x00);
if (ret < 0) {
dev_err(charger->dev,
"%s(): Error in writing reg 0x%x\n",
__func__, TPS65090_REG_INTR_STS);
}
}
if (charger->prev_ac_online != charger->ac_online)
power_supply_changed(charger->ac);
return IRQ_HANDLED;
}
static struct tps65090_platform_data *
tps65090_parse_dt_charger_data(struct platform_device *pdev)
{
struct tps65090_platform_data *pdata;
struct device_node *np = pdev->dev.of_node;
unsigned int prop;
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata) {
dev_err(&pdev->dev, "Memory alloc for tps65090_pdata failed\n");
return NULL;
}
prop = of_property_read_bool(np, "ti,enable-low-current-chrg");
pdata->enable_low_current_chrg = prop;
pdata->irq_base = -1;
return pdata;
}
static int tps65090_charger_poll_task(void *data)
{
set_freezable();
while (!kthread_should_stop()) {
schedule_timeout_interruptible(POLL_INTERVAL);
try_to_freeze();
tps65090_charger_isr(-1, data);
}
return 0;
}
static const struct power_supply_desc tps65090_charger_desc = {
.name = "tps65090-ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.get_property = tps65090_ac_get_property,
.properties = tps65090_ac_props,
.num_properties = ARRAY_SIZE(tps65090_ac_props),
};
static int tps65090_charger_probe(struct platform_device *pdev)
{
struct tps65090_charger *cdata;
struct tps65090_platform_data *pdata;
struct power_supply_config psy_cfg = {};
uint8_t status1 = 0;
int ret;
int irq;
pdata = dev_get_platdata(pdev->dev.parent);
if (IS_ENABLED(CONFIG_OF) && !pdata && pdev->dev.of_node)
pdata = tps65090_parse_dt_charger_data(pdev);
if (!pdata) {
dev_err(&pdev->dev, "%s():no platform data available\n",
__func__);
return -ENODEV;
}
cdata = devm_kzalloc(&pdev->dev, sizeof(*cdata), GFP_KERNEL);
if (!cdata) {
dev_err(&pdev->dev, "failed to allocate memory status\n");
return -ENOMEM;
}
platform_set_drvdata(pdev, cdata);
cdata->dev = &pdev->dev;
cdata->pdata = pdata;
psy_cfg.supplied_to = pdata->supplied_to;
psy_cfg.num_supplicants = pdata->num_supplicants;
psy_cfg.of_node = pdev->dev.of_node;
psy_cfg.drv_data = cdata;
cdata->ac = power_supply_register(&pdev->dev, &tps65090_charger_desc,
&psy_cfg);
if (IS_ERR(cdata->ac)) {
dev_err(&pdev->dev, "failed: power supply register\n");
return PTR_ERR(cdata->ac);
}
irq = platform_get_irq(pdev, 0);
if (irq < 0)
irq = -ENXIO;
cdata->irq = irq;
ret = tps65090_config_charger(cdata);
if (ret < 0) {
dev_err(&pdev->dev, "charger config failed, err %d\n", ret);
goto fail_unregister_supply;
}
/* Check for charger presence */
ret = tps65090_read(cdata->dev->parent, TPS65090_REG_CG_STATUS1,
&status1);
if (ret < 0) {
dev_err(cdata->dev, "%s(): Error in reading reg 0x%x", __func__,
TPS65090_REG_CG_STATUS1);
goto fail_unregister_supply;
}
if (status1 != 0) {
ret = tps65090_enable_charging(cdata);
if (ret < 0) {
dev_err(cdata->dev, "error enabling charger\n");
goto fail_unregister_supply;
}
cdata->ac_online = 1;
power_supply_changed(cdata->ac);
}
if (irq != -ENXIO) {
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
tps65090_charger_isr, IRQF_ONESHOT, "tps65090-charger", cdata);
if (ret) {
dev_err(cdata->dev,
"Unable to register irq %d err %d\n", irq,
ret);
goto fail_unregister_supply;
}
} else {
cdata->poll_task = kthread_run(tps65090_charger_poll_task,
cdata, "ktps65090charger");
cdata->passive_mode = true;
if (IS_ERR(cdata->poll_task)) {
ret = PTR_ERR(cdata->poll_task);
dev_err(cdata->dev,
"Unable to run kthread err %d\n", ret);
goto fail_unregister_supply;
}
}
return 0;
fail_unregister_supply:
power_supply_unregister(cdata->ac);
return ret;
}
static int tps65090_charger_remove(struct platform_device *pdev)
{
struct tps65090_charger *cdata = platform_get_drvdata(pdev);
if (cdata->irq == -ENXIO)
kthread_stop(cdata->poll_task);
power_supply_unregister(cdata->ac);
return 0;
}
static const struct of_device_id of_tps65090_charger_match[] = {
{ .compatible = "ti,tps65090-charger", },
{ /* end */ }
};
MODULE_DEVICE_TABLE(of, of_tps65090_charger_match);
static struct platform_driver tps65090_charger_driver = {
.driver = {
.name = "tps65090-charger",
.of_match_table = of_tps65090_charger_match,
},
.probe = tps65090_charger_probe,
.remove = tps65090_charger_remove,
};
module_platform_driver(tps65090_charger_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Syed Rafiuddin <[email protected]>");
MODULE_DESCRIPTION("tps65090 battery charger driver");
| linux-master | drivers/power/supply/tps65090-charger.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* AXP20X and AXP22X PMICs' ACIN power supply driver
*
* Copyright (C) 2016 Free Electrons
* Quentin Schulz <[email protected]>
*/
#include <linux/device.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/axp20x.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/iio/consumer.h>
#define AXP20X_PWR_STATUS_ACIN_PRESENT BIT(7)
#define AXP20X_PWR_STATUS_ACIN_AVAIL BIT(6)
#define AXP813_ACIN_PATH_SEL BIT(7)
#define AXP813_ACIN_PATH_SEL_TO_BIT(x) (!!(x) << 7)
#define AXP813_VHOLD_MASK GENMASK(5, 3)
#define AXP813_VHOLD_UV_TO_BIT(x) ((((x) / 100000) - 40) << 3)
#define AXP813_VHOLD_REG_TO_UV(x) \
(((((x) & AXP813_VHOLD_MASK) >> 3) + 40) * 100000)
#define AXP813_CURR_LIMIT_MASK GENMASK(2, 0)
#define AXP813_CURR_LIMIT_UA_TO_BIT(x) (((x) / 500000) - 3)
#define AXP813_CURR_LIMIT_REG_TO_UA(x) \
((((x) & AXP813_CURR_LIMIT_MASK) + 3) * 500000)
#define DRVNAME "axp20x-ac-power-supply"
struct axp20x_ac_power {
struct regmap *regmap;
struct power_supply *supply;
struct iio_channel *acin_v;
struct iio_channel *acin_i;
bool has_acin_path_sel;
unsigned int num_irqs;
unsigned int irqs[];
};
static irqreturn_t axp20x_ac_power_irq(int irq, void *devid)
{
struct axp20x_ac_power *power = devid;
power_supply_changed(power->supply);
return IRQ_HANDLED;
}
static int axp20x_ac_power_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct axp20x_ac_power *power = power_supply_get_drvdata(psy);
int ret, reg;
switch (psp) {
case POWER_SUPPLY_PROP_HEALTH:
ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®);
if (ret)
return ret;
if (reg & AXP20X_PWR_STATUS_ACIN_PRESENT) {
val->intval = POWER_SUPPLY_HEALTH_GOOD;
return 0;
}
val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
return 0;
case POWER_SUPPLY_PROP_PRESENT:
ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®);
if (ret)
return ret;
val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_PRESENT);
return 0;
case POWER_SUPPLY_PROP_ONLINE:
ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®);
if (ret)
return ret;
val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_AVAIL);
/* ACIN_PATH_SEL disables ACIN even if ACIN_AVAIL is set. */
if (val->intval && power->has_acin_path_sel) {
ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL,
®);
if (ret)
return ret;
val->intval = !!(reg & AXP813_ACIN_PATH_SEL);
}
return 0;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = iio_read_channel_processed(power->acin_v, &val->intval);
if (ret)
return ret;
/* IIO framework gives mV but Power Supply framework gives uV */
val->intval *= 1000;
return 0;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = iio_read_channel_processed(power->acin_i, &val->intval);
if (ret)
return ret;
/* IIO framework gives mA but Power Supply framework gives uA */
val->intval *= 1000;
return 0;
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL, ®);
if (ret)
return ret;
val->intval = AXP813_VHOLD_REG_TO_UV(reg);
return 0;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL, ®);
if (ret)
return ret;
val->intval = AXP813_CURR_LIMIT_REG_TO_UA(reg);
/* AXP813 datasheet defines values 11x as 4000mA */
if (val->intval > 4000000)
val->intval = 4000000;
return 0;
default:
return -EINVAL;
}
return -EINVAL;
}
static int axp813_ac_power_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct axp20x_ac_power *power = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,
AXP813_ACIN_PATH_SEL,
AXP813_ACIN_PATH_SEL_TO_BIT(val->intval));
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
if (val->intval < 4000000 || val->intval > 4700000)
return -EINVAL;
return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,
AXP813_VHOLD_MASK,
AXP813_VHOLD_UV_TO_BIT(val->intval));
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
if (val->intval < 1500000 || val->intval > 4000000)
return -EINVAL;
return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,
AXP813_CURR_LIMIT_MASK,
AXP813_CURR_LIMIT_UA_TO_BIT(val->intval));
default:
return -EINVAL;
}
return -EINVAL;
}
static int axp813_ac_power_prop_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
return psp == POWER_SUPPLY_PROP_ONLINE ||
psp == POWER_SUPPLY_PROP_VOLTAGE_MIN ||
psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT;
}
static enum power_supply_property axp20x_ac_power_properties[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
static enum power_supply_property axp22x_ac_power_properties[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
};
static enum power_supply_property axp813_ac_power_properties[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_MIN,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
};
static const struct power_supply_desc axp20x_ac_power_desc = {
.name = "axp20x-ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = axp20x_ac_power_properties,
.num_properties = ARRAY_SIZE(axp20x_ac_power_properties),
.get_property = axp20x_ac_power_get_property,
};
static const struct power_supply_desc axp22x_ac_power_desc = {
.name = "axp22x-ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = axp22x_ac_power_properties,
.num_properties = ARRAY_SIZE(axp22x_ac_power_properties),
.get_property = axp20x_ac_power_get_property,
};
static const struct power_supply_desc axp813_ac_power_desc = {
.name = "axp813-ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = axp813_ac_power_properties,
.num_properties = ARRAY_SIZE(axp813_ac_power_properties),
.property_is_writeable = axp813_ac_power_prop_writeable,
.get_property = axp20x_ac_power_get_property,
.set_property = axp813_ac_power_set_property,
};
static const char * const axp20x_irq_names[] = {
"ACIN_PLUGIN",
"ACIN_REMOVAL",
};
struct axp_data {
const struct power_supply_desc *power_desc;
const char * const *irq_names;
unsigned int num_irq_names;
bool acin_adc;
bool acin_path_sel;
};
static const struct axp_data axp20x_data = {
.power_desc = &axp20x_ac_power_desc,
.irq_names = axp20x_irq_names,
.num_irq_names = ARRAY_SIZE(axp20x_irq_names),
.acin_adc = true,
.acin_path_sel = false,
};
static const struct axp_data axp22x_data = {
.power_desc = &axp22x_ac_power_desc,
.irq_names = axp20x_irq_names,
.num_irq_names = ARRAY_SIZE(axp20x_irq_names),
.acin_adc = false,
.acin_path_sel = false,
};
static const struct axp_data axp813_data = {
.power_desc = &axp813_ac_power_desc,
.irq_names = axp20x_irq_names,
.num_irq_names = ARRAY_SIZE(axp20x_irq_names),
.acin_adc = false,
.acin_path_sel = true,
};
#ifdef CONFIG_PM_SLEEP
static int axp20x_ac_power_suspend(struct device *dev)
{
struct axp20x_ac_power *power = dev_get_drvdata(dev);
int i = 0;
/*
* Allow wake via ACIN_PLUGIN only.
*
* As nested threaded IRQs are not automatically disabled during
* suspend, we must explicitly disable the remainder of the IRQs.
*/
if (device_may_wakeup(&power->supply->dev))
enable_irq_wake(power->irqs[i++]);
while (i < power->num_irqs)
disable_irq(power->irqs[i++]);
return 0;
}
static int axp20x_ac_power_resume(struct device *dev)
{
struct axp20x_ac_power *power = dev_get_drvdata(dev);
int i = 0;
if (device_may_wakeup(&power->supply->dev))
disable_irq_wake(power->irqs[i++]);
while (i < power->num_irqs)
enable_irq(power->irqs[i++]);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(axp20x_ac_power_pm_ops, axp20x_ac_power_suspend,
axp20x_ac_power_resume);
static int axp20x_ac_power_probe(struct platform_device *pdev)
{
struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
struct power_supply_config psy_cfg = {};
struct axp20x_ac_power *power;
const struct axp_data *axp_data;
int i, irq, ret;
if (!of_device_is_available(pdev->dev.of_node))
return -ENODEV;
if (!axp20x) {
dev_err(&pdev->dev, "Parent drvdata not set\n");
return -EINVAL;
}
axp_data = of_device_get_match_data(&pdev->dev);
power = devm_kzalloc(&pdev->dev,
struct_size(power, irqs, axp_data->num_irq_names),
GFP_KERNEL);
if (!power)
return -ENOMEM;
if (axp_data->acin_adc) {
power->acin_v = devm_iio_channel_get(&pdev->dev, "acin_v");
if (IS_ERR(power->acin_v)) {
if (PTR_ERR(power->acin_v) == -ENODEV)
return -EPROBE_DEFER;
return PTR_ERR(power->acin_v);
}
power->acin_i = devm_iio_channel_get(&pdev->dev, "acin_i");
if (IS_ERR(power->acin_i)) {
if (PTR_ERR(power->acin_i) == -ENODEV)
return -EPROBE_DEFER;
return PTR_ERR(power->acin_i);
}
}
power->regmap = dev_get_regmap(pdev->dev.parent, NULL);
power->has_acin_path_sel = axp_data->acin_path_sel;
power->num_irqs = axp_data->num_irq_names;
platform_set_drvdata(pdev, power);
psy_cfg.of_node = pdev->dev.of_node;
psy_cfg.drv_data = power;
power->supply = devm_power_supply_register(&pdev->dev,
axp_data->power_desc,
&psy_cfg);
if (IS_ERR(power->supply))
return PTR_ERR(power->supply);
/* Request irqs after registering, as irqs may trigger immediately */
for (i = 0; i < axp_data->num_irq_names; i++) {
irq = platform_get_irq_byname(pdev, axp_data->irq_names[i]);
if (irq < 0)
return irq;
power->irqs[i] = regmap_irq_get_virq(axp20x->regmap_irqc, irq);
ret = devm_request_any_context_irq(&pdev->dev, power->irqs[i],
axp20x_ac_power_irq, 0,
DRVNAME, power);
if (ret < 0) {
dev_err(&pdev->dev, "Error requesting %s IRQ: %d\n",
axp_data->irq_names[i], ret);
return ret;
}
}
return 0;
}
static const struct of_device_id axp20x_ac_power_match[] = {
{
.compatible = "x-powers,axp202-ac-power-supply",
.data = &axp20x_data,
}, {
.compatible = "x-powers,axp221-ac-power-supply",
.data = &axp22x_data,
}, {
.compatible = "x-powers,axp813-ac-power-supply",
.data = &axp813_data,
}, { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, axp20x_ac_power_match);
static struct platform_driver axp20x_ac_power_driver = {
.probe = axp20x_ac_power_probe,
.driver = {
.name = DRVNAME,
.of_match_table = axp20x_ac_power_match,
.pm = &axp20x_ac_power_pm_ops,
},
};
module_platform_driver(axp20x_ac_power_driver);
MODULE_AUTHOR("Quentin Schulz <[email protected]>");
MODULE_DESCRIPTION("AXP20X and AXP22X PMICs' AC power supply driver");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/axp20x_ac_power.c |
// SPDX-License-Identifier: GPL-2.0+
//
// max8997_charger.c - Power supply consumer driver for the Maxim 8997/8966
//
// Copyright (C) 2011 Samsung Electronics
// MyungJoo Ham <[email protected]>
#include <linux/err.h>
#include <linux/extcon.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/mfd/max8997.h>
#include <linux/mfd/max8997-private.h>
#include <linux/regulator/consumer.h>
#include <linux/devm-helpers.h>
/* MAX8997_REG_STATUS4 */
#define DCINOK_SHIFT 1
#define DCINOK_MASK (1 << DCINOK_SHIFT)
#define DETBAT_SHIFT 2
#define DETBAT_MASK (1 << DETBAT_SHIFT)
/* MAX8997_REG_MBCCTRL1 */
#define TFCH_SHIFT 4
#define TFCH_MASK (7 << TFCH_SHIFT)
/* MAX8997_REG_MBCCTRL5 */
#define ITOPOFF_SHIFT 0
#define ITOPOFF_MASK (0xF << ITOPOFF_SHIFT)
struct charger_data {
struct device *dev;
struct max8997_dev *iodev;
struct power_supply *battery;
struct regulator *reg;
struct extcon_dev *edev;
struct notifier_block extcon_nb;
struct work_struct extcon_work;
};
static enum power_supply_property max8997_battery_props[] = {
POWER_SUPPLY_PROP_STATUS, /* "FULL", "CHARGING" or "DISCHARGING". */
POWER_SUPPLY_PROP_PRESENT, /* the presence of battery */
POWER_SUPPLY_PROP_ONLINE, /* charger is active or not */
};
/* Note that the charger control is done by a current regulator "CHARGER" */
static int max8997_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct charger_data *charger = power_supply_get_drvdata(psy);
struct i2c_client *i2c = charger->iodev->i2c;
int ret;
u8 reg;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
val->intval = 0;
ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, ®);
if (ret)
return ret;
if ((reg & (1 << 0)) == 0x1)
val->intval = POWER_SUPPLY_STATUS_FULL;
else if ((reg & DCINOK_MASK))
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = 0;
ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, ®);
if (ret)
return ret;
if ((reg & DETBAT_MASK) == 0x0)
val->intval = 1;
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = 0;
ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, ®);
if (ret)
return ret;
if (reg & DCINOK_MASK)
val->intval = 1;
break;
default:
return -EINVAL;
}
return 0;
}
static void max8997_battery_extcon_evt_worker(struct work_struct *work)
{
struct charger_data *charger =
container_of(work, struct charger_data, extcon_work);
struct extcon_dev *edev = charger->edev;
int current_limit;
if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) {
dev_dbg(charger->dev, "USB SDP charger is connected\n");
current_limit = 450000;
} else if (extcon_get_state(edev, EXTCON_CHG_USB_DCP) > 0) {
dev_dbg(charger->dev, "USB DCP charger is connected\n");
current_limit = 650000;
} else if (extcon_get_state(edev, EXTCON_CHG_USB_FAST) > 0) {
dev_dbg(charger->dev, "USB FAST charger is connected\n");
current_limit = 650000;
} else if (extcon_get_state(edev, EXTCON_CHG_USB_SLOW) > 0) {
dev_dbg(charger->dev, "USB SLOW charger is connected\n");
current_limit = 650000;
} else if (extcon_get_state(edev, EXTCON_CHG_USB_CDP) > 0) {
dev_dbg(charger->dev, "USB CDP charger is connected\n");
current_limit = 650000;
} else {
dev_dbg(charger->dev, "USB charger is disconnected\n");
current_limit = -1;
}
if (current_limit > 0) {
int ret = regulator_set_current_limit(charger->reg, current_limit, current_limit);
if (ret) {
dev_err(charger->dev, "failed to set current limit: %d\n", ret);
return;
}
ret = regulator_enable(charger->reg);
if (ret)
dev_err(charger->dev, "failed to enable regulator: %d\n", ret);
} else {
int ret = regulator_disable(charger->reg);
if (ret)
dev_err(charger->dev, "failed to disable regulator: %d\n", ret);
}
}
static int max8997_battery_extcon_evt(struct notifier_block *nb,
unsigned long event, void *param)
{
struct charger_data *charger =
container_of(nb, struct charger_data, extcon_nb);
schedule_work(&charger->extcon_work);
return NOTIFY_OK;
}
static const struct power_supply_desc max8997_battery_desc = {
.name = "max8997_pmic",
.type = POWER_SUPPLY_TYPE_BATTERY,
.get_property = max8997_battery_get_property,
.properties = max8997_battery_props,
.num_properties = ARRAY_SIZE(max8997_battery_props),
};
static int max8997_battery_probe(struct platform_device *pdev)
{
int ret = 0;
struct charger_data *charger;
struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct device_node *np = pdev->dev.of_node;
struct i2c_client *i2c = iodev->i2c;
struct max8997_platform_data *pdata = iodev->pdata;
struct power_supply_config psy_cfg = {};
if (!pdata) {
dev_err(&pdev->dev, "No platform data supplied.\n");
return -EINVAL;
}
if (pdata->eoc_mA) {
int val = (pdata->eoc_mA - 50) / 10;
if (val < 0)
val = 0;
if (val > 0xf)
val = 0xf;
ret = max8997_update_reg(i2c, MAX8997_REG_MBCCTRL5,
val << ITOPOFF_SHIFT, ITOPOFF_MASK);
if (ret < 0) {
dev_err(&pdev->dev, "Cannot use i2c bus.\n");
return ret;
}
}
switch (pdata->timeout) {
case 5:
ret = max8997_update_reg(i2c, MAX8997_REG_MBCCTRL1,
0x2 << TFCH_SHIFT, TFCH_MASK);
break;
case 6:
ret = max8997_update_reg(i2c, MAX8997_REG_MBCCTRL1,
0x3 << TFCH_SHIFT, TFCH_MASK);
break;
case 7:
ret = max8997_update_reg(i2c, MAX8997_REG_MBCCTRL1,
0x4 << TFCH_SHIFT, TFCH_MASK);
break;
case 0:
ret = max8997_update_reg(i2c, MAX8997_REG_MBCCTRL1,
0x7 << TFCH_SHIFT, TFCH_MASK);
break;
default:
dev_err(&pdev->dev, "incorrect timeout value (%d)\n",
pdata->timeout);
return -EINVAL;
}
if (ret < 0) {
dev_err(&pdev->dev, "Cannot use i2c bus.\n");
return ret;
}
charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
if (!charger)
return -ENOMEM;
platform_set_drvdata(pdev, charger);
charger->dev = &pdev->dev;
charger->iodev = iodev;
psy_cfg.drv_data = charger;
charger->battery = devm_power_supply_register(&pdev->dev,
&max8997_battery_desc,
&psy_cfg);
if (IS_ERR(charger->battery)) {
dev_err(&pdev->dev, "failed: power supply register\n");
return PTR_ERR(charger->battery);
}
// grab regulator from parent device's node
pdev->dev.of_node = iodev->dev->of_node;
charger->reg = devm_regulator_get_optional(&pdev->dev, "charger");
pdev->dev.of_node = np;
if (IS_ERR(charger->reg)) {
if (PTR_ERR(charger->reg) == -EPROBE_DEFER)
return -EPROBE_DEFER;
dev_info(&pdev->dev, "couldn't get charger regulator\n");
}
charger->edev = extcon_get_extcon_dev("max8997-muic");
if (IS_ERR(charger->edev)) {
dev_err_probe(charger->dev, PTR_ERR(charger->edev),
"couldn't get extcon device: max8997-muic\n");
return PTR_ERR(charger->edev);
}
if (!IS_ERR(charger->reg) && !IS_ERR_OR_NULL(charger->edev)) {
ret = devm_work_autocancel(&pdev->dev, &charger->extcon_work,
max8997_battery_extcon_evt_worker);
if (ret) {
dev_err(&pdev->dev, "failed to add extcon evt stop action: %d\n", ret);
return ret;
}
charger->extcon_nb.notifier_call = max8997_battery_extcon_evt;
ret = devm_extcon_register_notifier_all(&pdev->dev, charger->edev,
&charger->extcon_nb);
if (ret) {
dev_err(&pdev->dev, "failed to register extcon notifier\n");
return ret;
}
}
return 0;
}
static const struct platform_device_id max8997_battery_id[] = {
{ "max8997-battery", 0 },
{ }
};
MODULE_DEVICE_TABLE(platform, max8997_battery_id);
static struct platform_driver max8997_battery_driver = {
.driver = {
.name = "max8997-battery",
},
.probe = max8997_battery_probe,
.id_table = max8997_battery_id,
};
module_platform_driver(max8997_battery_driver);
MODULE_DESCRIPTION("MAXIM 8997/8966 battery control driver");
MODULE_AUTHOR("MyungJoo Ham <[email protected]>");
MODULE_LICENSE("GPL");
| linux-master | drivers/power/supply/max8997_charger.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include <linux/crc32.h>
#include "rxe.h"
#include "rxe_loc.h"
/**
* rxe_icrc_init() - Initialize crypto function for computing crc32
* @rxe: rdma_rxe device object
*
* Return: 0 on success else an error
*/
int rxe_icrc_init(struct rxe_dev *rxe)
{
struct crypto_shash *tfm;
tfm = crypto_alloc_shash("crc32", 0, 0);
if (IS_ERR(tfm)) {
rxe_dbg_dev(rxe, "failed to init crc32 algorithm err: %ld\n",
PTR_ERR(tfm));
return PTR_ERR(tfm);
}
rxe->tfm = tfm;
return 0;
}
/**
* rxe_crc32() - Compute cumulative crc32 for a contiguous segment
* @rxe: rdma_rxe device object
* @crc: starting crc32 value from previous segments
* @next: starting address of current segment
* @len: length of current segment
*
* Return: the cumulative crc32 checksum
*/
static __be32 rxe_crc32(struct rxe_dev *rxe, __be32 crc, void *next, size_t len)
{
__be32 icrc;
int err;
SHASH_DESC_ON_STACK(shash, rxe->tfm);
shash->tfm = rxe->tfm;
*(__be32 *)shash_desc_ctx(shash) = crc;
err = crypto_shash_update(shash, next, len);
if (unlikely(err)) {
rxe_dbg_dev(rxe, "failed crc calculation, err: %d\n", err);
return (__force __be32)crc32_le((__force u32)crc, next, len);
}
icrc = *(__be32 *)shash_desc_ctx(shash);
barrier_data(shash_desc_ctx(shash));
return icrc;
}
/**
* rxe_icrc_hdr() - Compute the partial ICRC for the network and transport
* headers of a packet.
* @skb: packet buffer
* @pkt: packet information
*
* Return: the partial ICRC
*/
static __be32 rxe_icrc_hdr(struct sk_buff *skb, struct rxe_pkt_info *pkt)
{
unsigned int bth_offset = 0;
struct iphdr *ip4h = NULL;
struct ipv6hdr *ip6h = NULL;
struct udphdr *udph;
struct rxe_bth *bth;
__be32 crc;
int length;
int hdr_size = sizeof(struct udphdr) +
(skb->protocol == htons(ETH_P_IP) ?
sizeof(struct iphdr) : sizeof(struct ipv6hdr));
/* pseudo header buffer size is calculate using ipv6 header size since
* it is bigger than ipv4
*/
u8 pshdr[sizeof(struct udphdr) +
sizeof(struct ipv6hdr) +
RXE_BTH_BYTES];
/* This seed is the result of computing a CRC with a seed of
* 0xfffffff and 8 bytes of 0xff representing a masked LRH.
*/
crc = (__force __be32)0xdebb20e3;
if (skb->protocol == htons(ETH_P_IP)) { /* IPv4 */
memcpy(pshdr, ip_hdr(skb), hdr_size);
ip4h = (struct iphdr *)pshdr;
udph = (struct udphdr *)(ip4h + 1);
ip4h->ttl = 0xff;
ip4h->check = CSUM_MANGLED_0;
ip4h->tos = 0xff;
} else { /* IPv6 */
memcpy(pshdr, ipv6_hdr(skb), hdr_size);
ip6h = (struct ipv6hdr *)pshdr;
udph = (struct udphdr *)(ip6h + 1);
memset(ip6h->flow_lbl, 0xff, sizeof(ip6h->flow_lbl));
ip6h->priority = 0xf;
ip6h->hop_limit = 0xff;
}
udph->check = CSUM_MANGLED_0;
bth_offset += hdr_size;
memcpy(&pshdr[bth_offset], pkt->hdr, RXE_BTH_BYTES);
bth = (struct rxe_bth *)&pshdr[bth_offset];
/* exclude bth.resv8a */
bth->qpn |= cpu_to_be32(~BTH_QPN_MASK);
length = hdr_size + RXE_BTH_BYTES;
crc = rxe_crc32(pkt->rxe, crc, pshdr, length);
/* And finish to compute the CRC on the remainder of the headers. */
crc = rxe_crc32(pkt->rxe, crc, pkt->hdr + RXE_BTH_BYTES,
rxe_opcode[pkt->opcode].length - RXE_BTH_BYTES);
return crc;
}
/**
* rxe_icrc_check() - Compute ICRC for a packet and compare to the ICRC
* delivered in the packet.
* @skb: packet buffer
* @pkt: packet information
*
* Return: 0 if the values match else an error
*/
int rxe_icrc_check(struct sk_buff *skb, struct rxe_pkt_info *pkt)
{
__be32 *icrcp;
__be32 pkt_icrc;
__be32 icrc;
icrcp = (__be32 *)(pkt->hdr + pkt->paylen - RXE_ICRC_SIZE);
pkt_icrc = *icrcp;
icrc = rxe_icrc_hdr(skb, pkt);
icrc = rxe_crc32(pkt->rxe, icrc, (u8 *)payload_addr(pkt),
payload_size(pkt) + bth_pad(pkt));
icrc = ~icrc;
if (unlikely(icrc != pkt_icrc))
return -EINVAL;
return 0;
}
/**
* rxe_icrc_generate() - compute ICRC for a packet.
* @skb: packet buffer
* @pkt: packet information
*/
void rxe_icrc_generate(struct sk_buff *skb, struct rxe_pkt_info *pkt)
{
__be32 *icrcp;
__be32 icrc;
icrcp = (__be32 *)(pkt->hdr + pkt->paylen - RXE_ICRC_SIZE);
icrc = rxe_icrc_hdr(skb, pkt);
icrc = rxe_crc32(pkt->rxe, icrc, (u8 *)payload_addr(pkt),
payload_size(pkt) + bth_pad(pkt));
*icrcp = ~icrc;
}
| linux-master | drivers/infiniband/sw/rxe/rxe_icrc.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include <linux/libnvdimm.h>
#include "rxe.h"
#include "rxe_loc.h"
/* Return a random 8 bit key value that is
* different than the last_key. Set last_key to -1
* if this is the first key for an MR or MW
*/
u8 rxe_get_next_key(u32 last_key)
{
u8 key;
do {
get_random_bytes(&key, 1);
} while (key == last_key);
return key;
}
int mr_check_range(struct rxe_mr *mr, u64 iova, size_t length)
{
switch (mr->ibmr.type) {
case IB_MR_TYPE_DMA:
return 0;
case IB_MR_TYPE_USER:
case IB_MR_TYPE_MEM_REG:
if (iova < mr->ibmr.iova ||
iova + length > mr->ibmr.iova + mr->ibmr.length) {
rxe_dbg_mr(mr, "iova/length out of range");
return -EINVAL;
}
return 0;
default:
rxe_dbg_mr(mr, "mr type not supported\n");
return -EINVAL;
}
}
static void rxe_mr_init(int access, struct rxe_mr *mr)
{
u32 key = mr->elem.index << 8 | rxe_get_next_key(-1);
/* set ibmr->l/rkey and also copy into private l/rkey
* for user MRs these will always be the same
* for cases where caller 'owns' the key portion
* they may be different until REG_MR WQE is executed.
*/
mr->lkey = mr->ibmr.lkey = key;
mr->rkey = mr->ibmr.rkey = key;
mr->access = access;
mr->ibmr.page_size = PAGE_SIZE;
mr->page_mask = PAGE_MASK;
mr->page_shift = PAGE_SHIFT;
mr->state = RXE_MR_STATE_INVALID;
}
void rxe_mr_init_dma(int access, struct rxe_mr *mr)
{
rxe_mr_init(access, mr);
mr->state = RXE_MR_STATE_VALID;
mr->ibmr.type = IB_MR_TYPE_DMA;
}
static unsigned long rxe_mr_iova_to_index(struct rxe_mr *mr, u64 iova)
{
return (iova >> mr->page_shift) - (mr->ibmr.iova >> mr->page_shift);
}
static unsigned long rxe_mr_iova_to_page_offset(struct rxe_mr *mr, u64 iova)
{
return iova & (mr_page_size(mr) - 1);
}
static bool is_pmem_page(struct page *pg)
{
unsigned long paddr = page_to_phys(pg);
return REGION_INTERSECTS ==
region_intersects(paddr, PAGE_SIZE, IORESOURCE_MEM,
IORES_DESC_PERSISTENT_MEMORY);
}
static int rxe_mr_fill_pages_from_sgt(struct rxe_mr *mr, struct sg_table *sgt)
{
XA_STATE(xas, &mr->page_list, 0);
struct sg_page_iter sg_iter;
struct page *page;
bool persistent = !!(mr->access & IB_ACCESS_FLUSH_PERSISTENT);
__sg_page_iter_start(&sg_iter, sgt->sgl, sgt->orig_nents, 0);
if (!__sg_page_iter_next(&sg_iter))
return 0;
do {
xas_lock(&xas);
while (true) {
page = sg_page_iter_page(&sg_iter);
if (persistent && !is_pmem_page(page)) {
rxe_dbg_mr(mr, "Page can't be persistent\n");
xas_set_err(&xas, -EINVAL);
break;
}
xas_store(&xas, page);
if (xas_error(&xas))
break;
xas_next(&xas);
if (!__sg_page_iter_next(&sg_iter))
break;
}
xas_unlock(&xas);
} while (xas_nomem(&xas, GFP_KERNEL));
return xas_error(&xas);
}
int rxe_mr_init_user(struct rxe_dev *rxe, u64 start, u64 length, u64 iova,
int access, struct rxe_mr *mr)
{
struct ib_umem *umem;
int err;
rxe_mr_init(access, mr);
xa_init(&mr->page_list);
umem = ib_umem_get(&rxe->ib_dev, start, length, access);
if (IS_ERR(umem)) {
rxe_dbg_mr(mr, "Unable to pin memory region err = %d\n",
(int)PTR_ERR(umem));
return PTR_ERR(umem);
}
err = rxe_mr_fill_pages_from_sgt(mr, &umem->sgt_append.sgt);
if (err) {
ib_umem_release(umem);
return err;
}
mr->umem = umem;
mr->ibmr.type = IB_MR_TYPE_USER;
mr->state = RXE_MR_STATE_VALID;
return 0;
}
static int rxe_mr_alloc(struct rxe_mr *mr, int num_buf)
{
XA_STATE(xas, &mr->page_list, 0);
int i = 0;
int err;
xa_init(&mr->page_list);
do {
xas_lock(&xas);
while (i != num_buf) {
xas_store(&xas, XA_ZERO_ENTRY);
if (xas_error(&xas))
break;
xas_next(&xas);
i++;
}
xas_unlock(&xas);
} while (xas_nomem(&xas, GFP_KERNEL));
err = xas_error(&xas);
if (err)
return err;
mr->num_buf = num_buf;
return 0;
}
int rxe_mr_init_fast(int max_pages, struct rxe_mr *mr)
{
int err;
/* always allow remote access for FMRs */
rxe_mr_init(RXE_ACCESS_REMOTE, mr);
err = rxe_mr_alloc(mr, max_pages);
if (err)
goto err1;
mr->state = RXE_MR_STATE_FREE;
mr->ibmr.type = IB_MR_TYPE_MEM_REG;
return 0;
err1:
return err;
}
static int rxe_set_page(struct ib_mr *ibmr, u64 dma_addr)
{
struct rxe_mr *mr = to_rmr(ibmr);
struct page *page = ib_virt_dma_to_page(dma_addr);
bool persistent = !!(mr->access & IB_ACCESS_FLUSH_PERSISTENT);
int err;
if (persistent && !is_pmem_page(page)) {
rxe_dbg_mr(mr, "Page cannot be persistent\n");
return -EINVAL;
}
if (unlikely(mr->nbuf == mr->num_buf))
return -ENOMEM;
err = xa_err(xa_store(&mr->page_list, mr->nbuf, page, GFP_KERNEL));
if (err)
return err;
mr->nbuf++;
return 0;
}
int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sgl,
int sg_nents, unsigned int *sg_offset)
{
struct rxe_mr *mr = to_rmr(ibmr);
unsigned int page_size = mr_page_size(mr);
mr->nbuf = 0;
mr->page_shift = ilog2(page_size);
mr->page_mask = ~((u64)page_size - 1);
mr->page_offset = mr->ibmr.iova & (page_size - 1);
return ib_sg_to_pages(ibmr, sgl, sg_nents, sg_offset, rxe_set_page);
}
static int rxe_mr_copy_xarray(struct rxe_mr *mr, u64 iova, void *addr,
unsigned int length, enum rxe_mr_copy_dir dir)
{
unsigned int page_offset = rxe_mr_iova_to_page_offset(mr, iova);
unsigned long index = rxe_mr_iova_to_index(mr, iova);
unsigned int bytes;
struct page *page;
void *va;
while (length) {
page = xa_load(&mr->page_list, index);
if (!page)
return -EFAULT;
bytes = min_t(unsigned int, length,
mr_page_size(mr) - page_offset);
va = kmap_local_page(page);
if (dir == RXE_FROM_MR_OBJ)
memcpy(addr, va + page_offset, bytes);
else
memcpy(va + page_offset, addr, bytes);
kunmap_local(va);
page_offset = 0;
addr += bytes;
length -= bytes;
index++;
}
return 0;
}
static void rxe_mr_copy_dma(struct rxe_mr *mr, u64 dma_addr, void *addr,
unsigned int length, enum rxe_mr_copy_dir dir)
{
unsigned int page_offset = dma_addr & (PAGE_SIZE - 1);
unsigned int bytes;
struct page *page;
u8 *va;
while (length) {
page = ib_virt_dma_to_page(dma_addr);
bytes = min_t(unsigned int, length,
PAGE_SIZE - page_offset);
va = kmap_local_page(page);
if (dir == RXE_TO_MR_OBJ)
memcpy(va + page_offset, addr, bytes);
else
memcpy(addr, va + page_offset, bytes);
kunmap_local(va);
page_offset = 0;
dma_addr += bytes;
addr += bytes;
length -= bytes;
}
}
int rxe_mr_copy(struct rxe_mr *mr, u64 iova, void *addr,
unsigned int length, enum rxe_mr_copy_dir dir)
{
int err;
if (length == 0)
return 0;
if (WARN_ON(!mr))
return -EINVAL;
if (mr->ibmr.type == IB_MR_TYPE_DMA) {
rxe_mr_copy_dma(mr, iova, addr, length, dir);
return 0;
}
err = mr_check_range(mr, iova, length);
if (unlikely(err)) {
rxe_dbg_mr(mr, "iova out of range");
return err;
}
return rxe_mr_copy_xarray(mr, iova, addr, length, dir);
}
/* copy data in or out of a wqe, i.e. sg list
* under the control of a dma descriptor
*/
int copy_data(
struct rxe_pd *pd,
int access,
struct rxe_dma_info *dma,
void *addr,
int length,
enum rxe_mr_copy_dir dir)
{
int bytes;
struct rxe_sge *sge = &dma->sge[dma->cur_sge];
int offset = dma->sge_offset;
int resid = dma->resid;
struct rxe_mr *mr = NULL;
u64 iova;
int err;
if (length == 0)
return 0;
if (length > resid) {
err = -EINVAL;
goto err2;
}
if (sge->length && (offset < sge->length)) {
mr = lookup_mr(pd, access, sge->lkey, RXE_LOOKUP_LOCAL);
if (!mr) {
err = -EINVAL;
goto err1;
}
}
while (length > 0) {
bytes = length;
if (offset >= sge->length) {
if (mr) {
rxe_put(mr);
mr = NULL;
}
sge++;
dma->cur_sge++;
offset = 0;
if (dma->cur_sge >= dma->num_sge) {
err = -ENOSPC;
goto err2;
}
if (sge->length) {
mr = lookup_mr(pd, access, sge->lkey,
RXE_LOOKUP_LOCAL);
if (!mr) {
err = -EINVAL;
goto err1;
}
} else {
continue;
}
}
if (bytes > sge->length - offset)
bytes = sge->length - offset;
if (bytes > 0) {
iova = sge->addr + offset;
err = rxe_mr_copy(mr, iova, addr, bytes, dir);
if (err)
goto err2;
offset += bytes;
resid -= bytes;
length -= bytes;
addr += bytes;
}
}
dma->sge_offset = offset;
dma->resid = resid;
if (mr)
rxe_put(mr);
return 0;
err2:
if (mr)
rxe_put(mr);
err1:
return err;
}
int rxe_flush_pmem_iova(struct rxe_mr *mr, u64 iova, unsigned int length)
{
unsigned int page_offset;
unsigned long index;
struct page *page;
unsigned int bytes;
int err;
u8 *va;
/* mr must be valid even if length is zero */
if (WARN_ON(!mr))
return -EINVAL;
if (length == 0)
return 0;
if (mr->ibmr.type == IB_MR_TYPE_DMA)
return -EFAULT;
err = mr_check_range(mr, iova, length);
if (err)
return err;
while (length > 0) {
index = rxe_mr_iova_to_index(mr, iova);
page = xa_load(&mr->page_list, index);
page_offset = rxe_mr_iova_to_page_offset(mr, iova);
if (!page)
return -EFAULT;
bytes = min_t(unsigned int, length,
mr_page_size(mr) - page_offset);
va = kmap_local_page(page);
arch_wb_cache_pmem(va + page_offset, bytes);
kunmap_local(va);
length -= bytes;
iova += bytes;
page_offset = 0;
}
return 0;
}
/* Guarantee atomicity of atomic operations at the machine level. */
static DEFINE_SPINLOCK(atomic_ops_lock);
int rxe_mr_do_atomic_op(struct rxe_mr *mr, u64 iova, int opcode,
u64 compare, u64 swap_add, u64 *orig_val)
{
unsigned int page_offset;
struct page *page;
u64 value;
u64 *va;
if (unlikely(mr->state != RXE_MR_STATE_VALID)) {
rxe_dbg_mr(mr, "mr not in valid state");
return RESPST_ERR_RKEY_VIOLATION;
}
if (mr->ibmr.type == IB_MR_TYPE_DMA) {
page_offset = iova & (PAGE_SIZE - 1);
page = ib_virt_dma_to_page(iova);
} else {
unsigned long index;
int err;
err = mr_check_range(mr, iova, sizeof(value));
if (err) {
rxe_dbg_mr(mr, "iova out of range");
return RESPST_ERR_RKEY_VIOLATION;
}
page_offset = rxe_mr_iova_to_page_offset(mr, iova);
index = rxe_mr_iova_to_index(mr, iova);
page = xa_load(&mr->page_list, index);
if (!page)
return RESPST_ERR_RKEY_VIOLATION;
}
if (unlikely(page_offset & 0x7)) {
rxe_dbg_mr(mr, "iova not aligned");
return RESPST_ERR_MISALIGNED_ATOMIC;
}
va = kmap_local_page(page);
spin_lock_bh(&atomic_ops_lock);
value = *orig_val = va[page_offset >> 3];
if (opcode == IB_OPCODE_RC_COMPARE_SWAP) {
if (value == compare)
va[page_offset >> 3] = swap_add;
} else {
value += swap_add;
va[page_offset >> 3] = value;
}
spin_unlock_bh(&atomic_ops_lock);
kunmap_local(va);
return 0;
}
#if defined CONFIG_64BIT
/* only implemented or called for 64 bit architectures */
int rxe_mr_do_atomic_write(struct rxe_mr *mr, u64 iova, u64 value)
{
unsigned int page_offset;
struct page *page;
u64 *va;
/* See IBA oA19-28 */
if (unlikely(mr->state != RXE_MR_STATE_VALID)) {
rxe_dbg_mr(mr, "mr not in valid state");
return RESPST_ERR_RKEY_VIOLATION;
}
if (mr->ibmr.type == IB_MR_TYPE_DMA) {
page_offset = iova & (PAGE_SIZE - 1);
page = ib_virt_dma_to_page(iova);
} else {
unsigned long index;
int err;
/* See IBA oA19-28 */
err = mr_check_range(mr, iova, sizeof(value));
if (unlikely(err)) {
rxe_dbg_mr(mr, "iova out of range");
return RESPST_ERR_RKEY_VIOLATION;
}
page_offset = rxe_mr_iova_to_page_offset(mr, iova);
index = rxe_mr_iova_to_index(mr, iova);
page = xa_load(&mr->page_list, index);
if (!page)
return RESPST_ERR_RKEY_VIOLATION;
}
/* See IBA A19.4.2 */
if (unlikely(page_offset & 0x7)) {
rxe_dbg_mr(mr, "misaligned address");
return RESPST_ERR_MISALIGNED_ATOMIC;
}
va = kmap_local_page(page);
/* Do atomic write after all prior operations have completed */
smp_store_release(&va[page_offset >> 3], value);
kunmap_local(va);
return 0;
}
#else
int rxe_mr_do_atomic_write(struct rxe_mr *mr, u64 iova, u64 value)
{
return RESPST_ERR_UNSUPPORTED_OPCODE;
}
#endif
int advance_dma_data(struct rxe_dma_info *dma, unsigned int length)
{
struct rxe_sge *sge = &dma->sge[dma->cur_sge];
int offset = dma->sge_offset;
int resid = dma->resid;
while (length) {
unsigned int bytes;
if (offset >= sge->length) {
sge++;
dma->cur_sge++;
offset = 0;
if (dma->cur_sge >= dma->num_sge)
return -ENOSPC;
}
bytes = length;
if (bytes > sge->length - offset)
bytes = sge->length - offset;
offset += bytes;
resid -= bytes;
length -= bytes;
}
dma->sge_offset = offset;
dma->resid = resid;
return 0;
}
struct rxe_mr *lookup_mr(struct rxe_pd *pd, int access, u32 key,
enum rxe_mr_lookup_type type)
{
struct rxe_mr *mr;
struct rxe_dev *rxe = to_rdev(pd->ibpd.device);
int index = key >> 8;
mr = rxe_pool_get_index(&rxe->mr_pool, index);
if (!mr)
return NULL;
if (unlikely((type == RXE_LOOKUP_LOCAL && mr->lkey != key) ||
(type == RXE_LOOKUP_REMOTE && mr->rkey != key) ||
mr_pd(mr) != pd || ((access & mr->access) != access) ||
mr->state != RXE_MR_STATE_VALID)) {
rxe_put(mr);
mr = NULL;
}
return mr;
}
int rxe_invalidate_mr(struct rxe_qp *qp, u32 key)
{
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
struct rxe_mr *mr;
int remote;
int ret;
mr = rxe_pool_get_index(&rxe->mr_pool, key >> 8);
if (!mr) {
rxe_dbg_qp(qp, "No MR for key %#x\n", key);
ret = -EINVAL;
goto err;
}
remote = mr->access & RXE_ACCESS_REMOTE;
if (remote ? (key != mr->rkey) : (key != mr->lkey)) {
rxe_dbg_mr(mr, "wr key (%#x) doesn't match mr key (%#x)\n",
key, (remote ? mr->rkey : mr->lkey));
ret = -EINVAL;
goto err_drop_ref;
}
if (atomic_read(&mr->num_mw) > 0) {
rxe_dbg_mr(mr, "Attempt to invalidate an MR while bound to MWs\n");
ret = -EINVAL;
goto err_drop_ref;
}
if (unlikely(mr->ibmr.type != IB_MR_TYPE_MEM_REG)) {
rxe_dbg_mr(mr, "Type (%d) is wrong\n", mr->ibmr.type);
ret = -EINVAL;
goto err_drop_ref;
}
mr->state = RXE_MR_STATE_FREE;
ret = 0;
err_drop_ref:
rxe_put(mr);
err:
return ret;
}
/* user can (re)register fast MR by executing a REG_MR WQE.
* user is expected to hold a reference on the ib mr until the
* WQE completes.
* Once a fast MR is created this is the only way to change the
* private keys. It is the responsibility of the user to maintain
* the ib mr keys in sync with rxe mr keys.
*/
int rxe_reg_fast_mr(struct rxe_qp *qp, struct rxe_send_wqe *wqe)
{
struct rxe_mr *mr = to_rmr(wqe->wr.wr.reg.mr);
u32 key = wqe->wr.wr.reg.key;
u32 access = wqe->wr.wr.reg.access;
/* user can only register MR in free state */
if (unlikely(mr->state != RXE_MR_STATE_FREE)) {
rxe_dbg_mr(mr, "mr->lkey = 0x%x not free\n", mr->lkey);
return -EINVAL;
}
/* user can only register mr with qp in same protection domain */
if (unlikely(qp->ibqp.pd != mr->ibmr.pd)) {
rxe_dbg_mr(mr, "qp->pd and mr->pd don't match\n");
return -EINVAL;
}
/* user is only allowed to change key portion of l/rkey */
if (unlikely((mr->lkey & ~0xff) != (key & ~0xff))) {
rxe_dbg_mr(mr, "key = 0x%x has wrong index mr->lkey = 0x%x\n",
key, mr->lkey);
return -EINVAL;
}
mr->access = access;
mr->lkey = key;
mr->rkey = key;
mr->ibmr.iova = wqe->wr.wr.reg.mr->iova;
mr->state = RXE_MR_STATE_VALID;
return 0;
}
void rxe_mr_cleanup(struct rxe_pool_elem *elem)
{
struct rxe_mr *mr = container_of(elem, typeof(*mr), elem);
rxe_put(mr_pd(mr));
ib_umem_release(mr->umem);
if (mr->ibmr.type != IB_MR_TYPE_DMA)
xa_destroy(&mr->page_list);
}
| linux-master | drivers/infiniband/sw/rxe/rxe_mr.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include <linux/vmalloc.h>
#include "rxe.h"
#include "rxe_loc.h"
#include "rxe_queue.h"
int rxe_cq_chk_attr(struct rxe_dev *rxe, struct rxe_cq *cq,
int cqe, int comp_vector)
{
int count;
if (cqe <= 0) {
rxe_dbg_dev(rxe, "cqe(%d) <= 0\n", cqe);
goto err1;
}
if (cqe > rxe->attr.max_cqe) {
rxe_dbg_dev(rxe, "cqe(%d) > max_cqe(%d)\n",
cqe, rxe->attr.max_cqe);
goto err1;
}
if (cq) {
count = queue_count(cq->queue, QUEUE_TYPE_TO_CLIENT);
if (cqe < count) {
rxe_dbg_cq(cq, "cqe(%d) < current # elements in queue (%d)",
cqe, count);
goto err1;
}
}
return 0;
err1:
return -EINVAL;
}
int rxe_cq_from_init(struct rxe_dev *rxe, struct rxe_cq *cq, int cqe,
int comp_vector, struct ib_udata *udata,
struct rxe_create_cq_resp __user *uresp)
{
int err;
enum queue_type type;
type = QUEUE_TYPE_TO_CLIENT;
cq->queue = rxe_queue_init(rxe, &cqe,
sizeof(struct rxe_cqe), type);
if (!cq->queue) {
rxe_dbg_dev(rxe, "unable to create cq\n");
return -ENOMEM;
}
err = do_mmap_info(rxe, uresp ? &uresp->mi : NULL, udata,
cq->queue->buf, cq->queue->buf_size, &cq->queue->ip);
if (err) {
vfree(cq->queue->buf);
kfree(cq->queue);
return err;
}
cq->is_user = uresp;
spin_lock_init(&cq->cq_lock);
cq->ibcq.cqe = cqe;
return 0;
}
int rxe_cq_resize_queue(struct rxe_cq *cq, int cqe,
struct rxe_resize_cq_resp __user *uresp,
struct ib_udata *udata)
{
int err;
err = rxe_queue_resize(cq->queue, (unsigned int *)&cqe,
sizeof(struct rxe_cqe), udata,
uresp ? &uresp->mi : NULL, NULL, &cq->cq_lock);
if (!err)
cq->ibcq.cqe = cqe;
return err;
}
/* caller holds reference to cq */
int rxe_cq_post(struct rxe_cq *cq, struct rxe_cqe *cqe, int solicited)
{
struct ib_event ev;
int full;
void *addr;
unsigned long flags;
spin_lock_irqsave(&cq->cq_lock, flags);
full = queue_full(cq->queue, QUEUE_TYPE_TO_CLIENT);
if (unlikely(full)) {
rxe_err_cq(cq, "queue full");
spin_unlock_irqrestore(&cq->cq_lock, flags);
if (cq->ibcq.event_handler) {
ev.device = cq->ibcq.device;
ev.element.cq = &cq->ibcq;
ev.event = IB_EVENT_CQ_ERR;
cq->ibcq.event_handler(&ev, cq->ibcq.cq_context);
}
return -EBUSY;
}
addr = queue_producer_addr(cq->queue, QUEUE_TYPE_TO_CLIENT);
memcpy(addr, cqe, sizeof(*cqe));
queue_advance_producer(cq->queue, QUEUE_TYPE_TO_CLIENT);
if ((cq->notify & IB_CQ_NEXT_COMP) ||
(cq->notify & IB_CQ_SOLICITED && solicited)) {
cq->notify = 0;
cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
}
spin_unlock_irqrestore(&cq->cq_lock, flags);
return 0;
}
void rxe_cq_cleanup(struct rxe_pool_elem *elem)
{
struct rxe_cq *cq = container_of(elem, typeof(*cq), elem);
if (cq->queue)
rxe_queue_cleanup(cq->queue);
}
| linux-master | drivers/infiniband/sw/rxe/rxe_cq.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include "rxe.h"
#define RXE_POOL_TIMEOUT (200)
#define RXE_POOL_ALIGN (16)
static const struct rxe_type_info {
const char *name;
size_t size;
size_t elem_offset;
void (*cleanup)(struct rxe_pool_elem *elem);
u32 min_index;
u32 max_index;
u32 max_elem;
} rxe_type_info[RXE_NUM_TYPES] = {
[RXE_TYPE_UC] = {
.name = "uc",
.size = sizeof(struct rxe_ucontext),
.elem_offset = offsetof(struct rxe_ucontext, elem),
.min_index = 1,
.max_index = RXE_MAX_UCONTEXT,
.max_elem = RXE_MAX_UCONTEXT,
},
[RXE_TYPE_PD] = {
.name = "pd",
.size = sizeof(struct rxe_pd),
.elem_offset = offsetof(struct rxe_pd, elem),
.min_index = 1,
.max_index = RXE_MAX_PD,
.max_elem = RXE_MAX_PD,
},
[RXE_TYPE_AH] = {
.name = "ah",
.size = sizeof(struct rxe_ah),
.elem_offset = offsetof(struct rxe_ah, elem),
.min_index = RXE_MIN_AH_INDEX,
.max_index = RXE_MAX_AH_INDEX,
.max_elem = RXE_MAX_AH,
},
[RXE_TYPE_SRQ] = {
.name = "srq",
.size = sizeof(struct rxe_srq),
.elem_offset = offsetof(struct rxe_srq, elem),
.cleanup = rxe_srq_cleanup,
.min_index = RXE_MIN_SRQ_INDEX,
.max_index = RXE_MAX_SRQ_INDEX,
.max_elem = RXE_MAX_SRQ,
},
[RXE_TYPE_QP] = {
.name = "qp",
.size = sizeof(struct rxe_qp),
.elem_offset = offsetof(struct rxe_qp, elem),
.cleanup = rxe_qp_cleanup,
.min_index = RXE_MIN_QP_INDEX,
.max_index = RXE_MAX_QP_INDEX,
.max_elem = RXE_MAX_QP,
},
[RXE_TYPE_CQ] = {
.name = "cq",
.size = sizeof(struct rxe_cq),
.elem_offset = offsetof(struct rxe_cq, elem),
.cleanup = rxe_cq_cleanup,
.min_index = 1,
.max_index = RXE_MAX_CQ,
.max_elem = RXE_MAX_CQ,
},
[RXE_TYPE_MR] = {
.name = "mr",
.size = sizeof(struct rxe_mr),
.elem_offset = offsetof(struct rxe_mr, elem),
.cleanup = rxe_mr_cleanup,
.min_index = RXE_MIN_MR_INDEX,
.max_index = RXE_MAX_MR_INDEX,
.max_elem = RXE_MAX_MR,
},
[RXE_TYPE_MW] = {
.name = "mw",
.size = sizeof(struct rxe_mw),
.elem_offset = offsetof(struct rxe_mw, elem),
.cleanup = rxe_mw_cleanup,
.min_index = RXE_MIN_MW_INDEX,
.max_index = RXE_MAX_MW_INDEX,
.max_elem = RXE_MAX_MW,
},
};
void rxe_pool_init(struct rxe_dev *rxe, struct rxe_pool *pool,
enum rxe_elem_type type)
{
const struct rxe_type_info *info = &rxe_type_info[type];
memset(pool, 0, sizeof(*pool));
pool->rxe = rxe;
pool->name = info->name;
pool->type = type;
pool->max_elem = info->max_elem;
pool->elem_size = ALIGN(info->size, RXE_POOL_ALIGN);
pool->elem_offset = info->elem_offset;
pool->cleanup = info->cleanup;
atomic_set(&pool->num_elem, 0);
xa_init_flags(&pool->xa, XA_FLAGS_ALLOC);
pool->limit.min = info->min_index;
pool->limit.max = info->max_index;
}
void rxe_pool_cleanup(struct rxe_pool *pool)
{
WARN_ON(!xa_empty(&pool->xa));
}
int __rxe_add_to_pool(struct rxe_pool *pool, struct rxe_pool_elem *elem,
bool sleepable)
{
int err;
gfp_t gfp_flags;
if (atomic_inc_return(&pool->num_elem) > pool->max_elem)
goto err_cnt;
elem->pool = pool;
elem->obj = (u8 *)elem - pool->elem_offset;
kref_init(&elem->ref_cnt);
init_completion(&elem->complete);
/* AH objects are unique in that the create_ah verb
* can be called in atomic context. If the create_ah
* call is not sleepable use GFP_ATOMIC.
*/
gfp_flags = sleepable ? GFP_KERNEL : GFP_ATOMIC;
if (sleepable)
might_sleep();
err = xa_alloc_cyclic(&pool->xa, &elem->index, NULL, pool->limit,
&pool->next, gfp_flags);
if (err < 0)
goto err_cnt;
return 0;
err_cnt:
atomic_dec(&pool->num_elem);
return -EINVAL;
}
void *rxe_pool_get_index(struct rxe_pool *pool, u32 index)
{
struct rxe_pool_elem *elem;
struct xarray *xa = &pool->xa;
void *obj;
rcu_read_lock();
elem = xa_load(xa, index);
if (elem && kref_get_unless_zero(&elem->ref_cnt))
obj = elem->obj;
else
obj = NULL;
rcu_read_unlock();
return obj;
}
static void rxe_elem_release(struct kref *kref)
{
struct rxe_pool_elem *elem = container_of(kref, typeof(*elem), ref_cnt);
complete(&elem->complete);
}
int __rxe_cleanup(struct rxe_pool_elem *elem, bool sleepable)
{
struct rxe_pool *pool = elem->pool;
struct xarray *xa = &pool->xa;
static int timeout = RXE_POOL_TIMEOUT;
int ret, err = 0;
void *xa_ret;
if (sleepable)
might_sleep();
/* erase xarray entry to prevent looking up
* the pool elem from its index
*/
xa_ret = xa_erase(xa, elem->index);
WARN_ON(xa_err(xa_ret));
/* if this is the last call to rxe_put complete the
* object. It is safe to touch obj->elem after this since
* it is freed below
*/
__rxe_put(elem);
/* wait until all references to the object have been
* dropped before final object specific cleanup and
* return to rdma-core
*/
if (sleepable) {
if (!completion_done(&elem->complete) && timeout) {
ret = wait_for_completion_timeout(&elem->complete,
timeout);
/* Shouldn't happen. There are still references to
* the object but, rather than deadlock, free the
* object or pass back to rdma-core.
*/
if (WARN_ON(!ret))
err = -EINVAL;
}
} else {
unsigned long until = jiffies + timeout;
/* AH objects are unique in that the destroy_ah verb
* can be called in atomic context. This delay
* replaces the wait_for_completion call above
* when the destroy_ah call is not sleepable
*/
while (!completion_done(&elem->complete) &&
time_before(jiffies, until))
mdelay(1);
if (WARN_ON(!completion_done(&elem->complete)))
err = -EINVAL;
}
if (pool->cleanup)
pool->cleanup(elem);
atomic_dec(&pool->num_elem);
return err;
}
int __rxe_get(struct rxe_pool_elem *elem)
{
return kref_get_unless_zero(&elem->ref_cnt);
}
int __rxe_put(struct rxe_pool_elem *elem)
{
return kref_put(&elem->ref_cnt, rxe_elem_release);
}
void __rxe_finalize(struct rxe_pool_elem *elem)
{
void *xa_ret;
xa_ret = xa_store(&elem->pool->xa, elem->index, elem, GFP_KERNEL);
WARN_ON(xa_err(xa_ret));
}
| linux-master | drivers/infiniband/sw/rxe/rxe_pool.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include <rdma/rdma_netlink.h>
#include <net/addrconf.h>
#include "rxe.h"
#include "rxe_loc.h"
MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib");
MODULE_DESCRIPTION("Soft RDMA transport");
MODULE_LICENSE("Dual BSD/GPL");
/* free resources for a rxe device all objects created for this device must
* have been destroyed
*/
void rxe_dealloc(struct ib_device *ib_dev)
{
struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev);
rxe_pool_cleanup(&rxe->uc_pool);
rxe_pool_cleanup(&rxe->pd_pool);
rxe_pool_cleanup(&rxe->ah_pool);
rxe_pool_cleanup(&rxe->srq_pool);
rxe_pool_cleanup(&rxe->qp_pool);
rxe_pool_cleanup(&rxe->cq_pool);
rxe_pool_cleanup(&rxe->mr_pool);
rxe_pool_cleanup(&rxe->mw_pool);
WARN_ON(!RB_EMPTY_ROOT(&rxe->mcg_tree));
if (rxe->tfm)
crypto_free_shash(rxe->tfm);
}
/* initialize rxe device parameters */
static void rxe_init_device_param(struct rxe_dev *rxe)
{
rxe->max_inline_data = RXE_MAX_INLINE_DATA;
rxe->attr.vendor_id = RXE_VENDOR_ID;
rxe->attr.max_mr_size = RXE_MAX_MR_SIZE;
rxe->attr.page_size_cap = RXE_PAGE_SIZE_CAP;
rxe->attr.max_qp = RXE_MAX_QP;
rxe->attr.max_qp_wr = RXE_MAX_QP_WR;
rxe->attr.device_cap_flags = RXE_DEVICE_CAP_FLAGS;
rxe->attr.kernel_cap_flags = IBK_ALLOW_USER_UNREG;
rxe->attr.max_send_sge = RXE_MAX_SGE;
rxe->attr.max_recv_sge = RXE_MAX_SGE;
rxe->attr.max_sge_rd = RXE_MAX_SGE_RD;
rxe->attr.max_cq = RXE_MAX_CQ;
rxe->attr.max_cqe = (1 << RXE_MAX_LOG_CQE) - 1;
rxe->attr.max_mr = RXE_MAX_MR;
rxe->attr.max_mw = RXE_MAX_MW;
rxe->attr.max_pd = RXE_MAX_PD;
rxe->attr.max_qp_rd_atom = RXE_MAX_QP_RD_ATOM;
rxe->attr.max_res_rd_atom = RXE_MAX_RES_RD_ATOM;
rxe->attr.max_qp_init_rd_atom = RXE_MAX_QP_INIT_RD_ATOM;
rxe->attr.atomic_cap = IB_ATOMIC_HCA;
rxe->attr.max_mcast_grp = RXE_MAX_MCAST_GRP;
rxe->attr.max_mcast_qp_attach = RXE_MAX_MCAST_QP_ATTACH;
rxe->attr.max_total_mcast_qp_attach = RXE_MAX_TOT_MCAST_QP_ATTACH;
rxe->attr.max_ah = RXE_MAX_AH;
rxe->attr.max_srq = RXE_MAX_SRQ;
rxe->attr.max_srq_wr = RXE_MAX_SRQ_WR;
rxe->attr.max_srq_sge = RXE_MAX_SRQ_SGE;
rxe->attr.max_fast_reg_page_list_len = RXE_MAX_FMR_PAGE_LIST_LEN;
rxe->attr.max_pkeys = RXE_MAX_PKEYS;
rxe->attr.local_ca_ack_delay = RXE_LOCAL_CA_ACK_DELAY;
addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid,
rxe->ndev->dev_addr);
rxe->max_ucontext = RXE_MAX_UCONTEXT;
}
/* initialize port attributes */
static void rxe_init_port_param(struct rxe_port *port)
{
port->attr.state = IB_PORT_DOWN;
port->attr.max_mtu = IB_MTU_4096;
port->attr.active_mtu = IB_MTU_256;
port->attr.gid_tbl_len = RXE_PORT_GID_TBL_LEN;
port->attr.port_cap_flags = RXE_PORT_PORT_CAP_FLAGS;
port->attr.max_msg_sz = RXE_PORT_MAX_MSG_SZ;
port->attr.bad_pkey_cntr = RXE_PORT_BAD_PKEY_CNTR;
port->attr.qkey_viol_cntr = RXE_PORT_QKEY_VIOL_CNTR;
port->attr.pkey_tbl_len = RXE_PORT_PKEY_TBL_LEN;
port->attr.lid = RXE_PORT_LID;
port->attr.sm_lid = RXE_PORT_SM_LID;
port->attr.lmc = RXE_PORT_LMC;
port->attr.max_vl_num = RXE_PORT_MAX_VL_NUM;
port->attr.sm_sl = RXE_PORT_SM_SL;
port->attr.subnet_timeout = RXE_PORT_SUBNET_TIMEOUT;
port->attr.init_type_reply = RXE_PORT_INIT_TYPE_REPLY;
port->attr.active_width = RXE_PORT_ACTIVE_WIDTH;
port->attr.active_speed = RXE_PORT_ACTIVE_SPEED;
port->attr.phys_state = RXE_PORT_PHYS_STATE;
port->mtu_cap = ib_mtu_enum_to_int(IB_MTU_256);
port->subnet_prefix = cpu_to_be64(RXE_PORT_SUBNET_PREFIX);
}
/* initialize port state, note IB convention that HCA ports are always
* numbered from 1
*/
static void rxe_init_ports(struct rxe_dev *rxe)
{
struct rxe_port *port = &rxe->port;
rxe_init_port_param(port);
addrconf_addr_eui48((unsigned char *)&port->port_guid,
rxe->ndev->dev_addr);
spin_lock_init(&port->port_lock);
}
/* init pools of managed objects */
static void rxe_init_pools(struct rxe_dev *rxe)
{
rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC);
rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD);
rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH);
rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ);
rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP);
rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ);
rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR);
rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW);
}
/* initialize rxe device state */
static void rxe_init(struct rxe_dev *rxe)
{
/* init default device parameters */
rxe_init_device_param(rxe);
rxe_init_ports(rxe);
rxe_init_pools(rxe);
/* init pending mmap list */
spin_lock_init(&rxe->mmap_offset_lock);
spin_lock_init(&rxe->pending_lock);
INIT_LIST_HEAD(&rxe->pending_mmaps);
/* init multicast support */
spin_lock_init(&rxe->mcg_lock);
rxe->mcg_tree = RB_ROOT;
mutex_init(&rxe->usdev_lock);
}
void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu)
{
struct rxe_port *port = &rxe->port;
enum ib_mtu mtu;
mtu = eth_mtu_int_to_enum(ndev_mtu);
/* Make sure that new MTU in range */
mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256;
port->attr.active_mtu = mtu;
port->mtu_cap = ib_mtu_enum_to_int(mtu);
rxe_info_dev(rxe, "Set mtu to %d", port->mtu_cap);
}
/* called by ifc layer to create new rxe device.
* The caller should allocate memory for rxe by calling ib_alloc_device.
*/
int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name)
{
rxe_init(rxe);
rxe_set_mtu(rxe, mtu);
return rxe_register_device(rxe, ibdev_name);
}
static int rxe_newlink(const char *ibdev_name, struct net_device *ndev)
{
struct rxe_dev *rxe;
int err = 0;
if (is_vlan_dev(ndev)) {
rxe_err("rxe creation allowed on top of a real device only");
err = -EPERM;
goto err;
}
rxe = rxe_get_dev_from_net(ndev);
if (rxe) {
ib_device_put(&rxe->ib_dev);
rxe_err_dev(rxe, "already configured on %s", ndev->name);
err = -EEXIST;
goto err;
}
err = rxe_net_add(ibdev_name, ndev);
if (err) {
rxe_err("failed to add %s\n", ndev->name);
goto err;
}
err:
return err;
}
static struct rdma_link_ops rxe_link_ops = {
.type = "rxe",
.newlink = rxe_newlink,
};
static int __init rxe_module_init(void)
{
int err;
err = rxe_alloc_wq();
if (err)
return err;
err = rxe_net_init();
if (err) {
rxe_destroy_wq();
return err;
}
rdma_link_register(&rxe_link_ops);
pr_info("loaded\n");
return 0;
}
static void __exit rxe_module_exit(void)
{
rdma_link_unregister(&rxe_link_ops);
ib_unregister_driver(RDMA_DRIVER_RXE);
rxe_net_exit();
rxe_destroy_wq();
pr_info("unloaded\n");
}
late_initcall(rxe_module_init);
module_exit(rxe_module_exit);
MODULE_ALIAS_RDMA_LINK("rxe");
| linux-master | drivers/infiniband/sw/rxe/rxe.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include <linux/skbuff.h>
#include "rxe.h"
#include "rxe_loc.h"
/* check that QP matches packet opcode type and is in a valid state */
static int check_type_state(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
struct rxe_qp *qp)
{
unsigned int pkt_type;
unsigned long flags;
if (unlikely(!qp->valid))
return -EINVAL;
pkt_type = pkt->opcode & 0xe0;
switch (qp_type(qp)) {
case IB_QPT_RC:
if (unlikely(pkt_type != IB_OPCODE_RC))
return -EINVAL;
break;
case IB_QPT_UC:
if (unlikely(pkt_type != IB_OPCODE_UC))
return -EINVAL;
break;
case IB_QPT_UD:
case IB_QPT_GSI:
if (unlikely(pkt_type != IB_OPCODE_UD))
return -EINVAL;
break;
default:
return -EINVAL;
}
spin_lock_irqsave(&qp->state_lock, flags);
if (pkt->mask & RXE_REQ_MASK) {
if (unlikely(qp_state(qp) < IB_QPS_RTR)) {
spin_unlock_irqrestore(&qp->state_lock, flags);
return -EINVAL;
}
} else {
if (unlikely(qp_state(qp) < IB_QPS_RTS)) {
spin_unlock_irqrestore(&qp->state_lock, flags);
return -EINVAL;
}
}
spin_unlock_irqrestore(&qp->state_lock, flags);
return 0;
}
static void set_bad_pkey_cntr(struct rxe_port *port)
{
spin_lock_bh(&port->port_lock);
port->attr.bad_pkey_cntr = min((u32)0xffff,
port->attr.bad_pkey_cntr + 1);
spin_unlock_bh(&port->port_lock);
}
static void set_qkey_viol_cntr(struct rxe_port *port)
{
spin_lock_bh(&port->port_lock);
port->attr.qkey_viol_cntr = min((u32)0xffff,
port->attr.qkey_viol_cntr + 1);
spin_unlock_bh(&port->port_lock);
}
static int check_keys(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
u32 qpn, struct rxe_qp *qp)
{
struct rxe_port *port = &rxe->port;
u16 pkey = bth_pkey(pkt);
pkt->pkey_index = 0;
if (!pkey_match(pkey, IB_DEFAULT_PKEY_FULL)) {
set_bad_pkey_cntr(port);
return -EINVAL;
}
if (qp_type(qp) == IB_QPT_UD || qp_type(qp) == IB_QPT_GSI) {
u32 qkey = (qpn == 1) ? GSI_QKEY : qp->attr.qkey;
if (unlikely(deth_qkey(pkt) != qkey)) {
set_qkey_viol_cntr(port);
return -EINVAL;
}
}
return 0;
}
static int check_addr(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
struct rxe_qp *qp)
{
struct sk_buff *skb = PKT_TO_SKB(pkt);
if (qp_type(qp) != IB_QPT_RC && qp_type(qp) != IB_QPT_UC)
return 0;
if (unlikely(pkt->port_num != qp->attr.port_num))
return -EINVAL;
if (skb->protocol == htons(ETH_P_IP)) {
struct in_addr *saddr =
&qp->pri_av.sgid_addr._sockaddr_in.sin_addr;
struct in_addr *daddr =
&qp->pri_av.dgid_addr._sockaddr_in.sin_addr;
if ((ip_hdr(skb)->daddr != saddr->s_addr) ||
(ip_hdr(skb)->saddr != daddr->s_addr))
return -EINVAL;
} else if (skb->protocol == htons(ETH_P_IPV6)) {
struct in6_addr *saddr =
&qp->pri_av.sgid_addr._sockaddr_in6.sin6_addr;
struct in6_addr *daddr =
&qp->pri_av.dgid_addr._sockaddr_in6.sin6_addr;
if (memcmp(&ipv6_hdr(skb)->daddr, saddr, sizeof(*saddr)) ||
memcmp(&ipv6_hdr(skb)->saddr, daddr, sizeof(*daddr)))
return -EINVAL;
}
return 0;
}
static int hdr_check(struct rxe_pkt_info *pkt)
{
struct rxe_dev *rxe = pkt->rxe;
struct rxe_port *port = &rxe->port;
struct rxe_qp *qp = NULL;
u32 qpn = bth_qpn(pkt);
int index;
int err;
if (unlikely(bth_tver(pkt) != BTH_TVER))
goto err1;
if (unlikely(qpn == 0))
goto err1;
if (qpn != IB_MULTICAST_QPN) {
index = (qpn == 1) ? port->qp_gsi_index : qpn;
qp = rxe_pool_get_index(&rxe->qp_pool, index);
if (unlikely(!qp))
goto err1;
err = check_type_state(rxe, pkt, qp);
if (unlikely(err))
goto err2;
err = check_addr(rxe, pkt, qp);
if (unlikely(err))
goto err2;
err = check_keys(rxe, pkt, qpn, qp);
if (unlikely(err))
goto err2;
} else {
if (unlikely((pkt->mask & RXE_GRH_MASK) == 0))
goto err1;
}
pkt->qp = qp;
return 0;
err2:
rxe_put(qp);
err1:
return -EINVAL;
}
static inline void rxe_rcv_pkt(struct rxe_pkt_info *pkt, struct sk_buff *skb)
{
if (pkt->mask & RXE_REQ_MASK)
rxe_resp_queue_pkt(pkt->qp, skb);
else
rxe_comp_queue_pkt(pkt->qp, skb);
}
static void rxe_rcv_mcast_pkt(struct rxe_dev *rxe, struct sk_buff *skb)
{
struct rxe_pkt_info *pkt = SKB_TO_PKT(skb);
struct rxe_mcg *mcg;
struct rxe_mca *mca;
struct rxe_qp *qp;
union ib_gid dgid;
int err;
if (skb->protocol == htons(ETH_P_IP))
ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr,
(struct in6_addr *)&dgid);
else if (skb->protocol == htons(ETH_P_IPV6))
memcpy(&dgid, &ipv6_hdr(skb)->daddr, sizeof(dgid));
/* lookup mcast group corresponding to mgid, takes a ref */
mcg = rxe_lookup_mcg(rxe, &dgid);
if (!mcg)
goto drop; /* mcast group not registered */
spin_lock_bh(&rxe->mcg_lock);
/* this is unreliable datagram service so we let
* failures to deliver a multicast packet to a
* single QP happen and just move on and try
* the rest of them on the list
*/
list_for_each_entry(mca, &mcg->qp_list, qp_list) {
qp = mca->qp;
/* validate qp for incoming packet */
err = check_type_state(rxe, pkt, qp);
if (err)
continue;
err = check_keys(rxe, pkt, bth_qpn(pkt), qp);
if (err)
continue;
/* for all but the last QP create a new clone of the
* skb and pass to the QP. Pass the original skb to
* the last QP in the list.
*/
if (mca->qp_list.next != &mcg->qp_list) {
struct sk_buff *cskb;
struct rxe_pkt_info *cpkt;
cskb = skb_clone(skb, GFP_ATOMIC);
if (unlikely(!cskb))
continue;
if (WARN_ON(!ib_device_try_get(&rxe->ib_dev))) {
kfree_skb(cskb);
break;
}
cpkt = SKB_TO_PKT(cskb);
cpkt->qp = qp;
rxe_get(qp);
rxe_rcv_pkt(cpkt, cskb);
} else {
pkt->qp = qp;
rxe_get(qp);
rxe_rcv_pkt(pkt, skb);
skb = NULL; /* mark consumed */
}
}
spin_unlock_bh(&rxe->mcg_lock);
kref_put(&mcg->ref_cnt, rxe_cleanup_mcg);
if (likely(!skb))
return;
/* This only occurs if one of the checks fails on the last
* QP in the list above
*/
drop:
kfree_skb(skb);
ib_device_put(&rxe->ib_dev);
}
/**
* rxe_chk_dgid - validate destination IP address
* @rxe: rxe device that received packet
* @skb: the received packet buffer
*
* Accept any loopback packets
* Extract IP address from packet and
* Accept if multicast packet
* Accept if matches an SGID table entry
*/
static int rxe_chk_dgid(struct rxe_dev *rxe, struct sk_buff *skb)
{
struct rxe_pkt_info *pkt = SKB_TO_PKT(skb);
const struct ib_gid_attr *gid_attr;
union ib_gid dgid;
union ib_gid *pdgid;
if (pkt->mask & RXE_LOOPBACK_MASK)
return 0;
if (skb->protocol == htons(ETH_P_IP)) {
ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr,
(struct in6_addr *)&dgid);
pdgid = &dgid;
} else {
pdgid = (union ib_gid *)&ipv6_hdr(skb)->daddr;
}
if (rdma_is_multicast_addr((struct in6_addr *)pdgid))
return 0;
gid_attr = rdma_find_gid_by_port(&rxe->ib_dev, pdgid,
IB_GID_TYPE_ROCE_UDP_ENCAP,
1, skb->dev);
if (IS_ERR(gid_attr))
return PTR_ERR(gid_attr);
rdma_put_gid_attr(gid_attr);
return 0;
}
/* rxe_rcv is called from the interface driver */
void rxe_rcv(struct sk_buff *skb)
{
int err;
struct rxe_pkt_info *pkt = SKB_TO_PKT(skb);
struct rxe_dev *rxe = pkt->rxe;
if (unlikely(skb->len < RXE_BTH_BYTES))
goto drop;
if (rxe_chk_dgid(rxe, skb) < 0)
goto drop;
pkt->opcode = bth_opcode(pkt);
pkt->psn = bth_psn(pkt);
pkt->qp = NULL;
pkt->mask |= rxe_opcode[pkt->opcode].mask;
if (unlikely(skb->len < header_size(pkt)))
goto drop;
err = hdr_check(pkt);
if (unlikely(err))
goto drop;
err = rxe_icrc_check(skb, pkt);
if (unlikely(err))
goto drop;
rxe_counter_inc(rxe, RXE_CNT_RCVD_PKTS);
if (unlikely(bth_qpn(pkt) == IB_MULTICAST_QPN))
rxe_rcv_mcast_pkt(rxe, skb);
else
rxe_rcv_pkt(pkt, skb);
return;
drop:
if (pkt->qp)
rxe_put(pkt->qp);
kfree_skb(skb);
ib_device_put(&rxe->ib_dev);
}
| linux-master | drivers/infiniband/sw/rxe/rxe_recv.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include <linux/vmalloc.h>
#include "rxe.h"
#include "rxe_queue.h"
int rxe_srq_chk_init(struct rxe_dev *rxe, struct ib_srq_init_attr *init)
{
struct ib_srq_attr *attr = &init->attr;
if (attr->max_wr > rxe->attr.max_srq_wr) {
rxe_dbg_dev(rxe, "max_wr(%d) > max_srq_wr(%d)\n",
attr->max_wr, rxe->attr.max_srq_wr);
goto err1;
}
if (attr->max_wr <= 0) {
rxe_dbg_dev(rxe, "max_wr(%d) <= 0\n", attr->max_wr);
goto err1;
}
if (attr->max_wr < RXE_MIN_SRQ_WR)
attr->max_wr = RXE_MIN_SRQ_WR;
if (attr->max_sge > rxe->attr.max_srq_sge) {
rxe_dbg_dev(rxe, "max_sge(%d) > max_srq_sge(%d)\n",
attr->max_sge, rxe->attr.max_srq_sge);
goto err1;
}
if (attr->max_sge < RXE_MIN_SRQ_SGE)
attr->max_sge = RXE_MIN_SRQ_SGE;
return 0;
err1:
return -EINVAL;
}
int rxe_srq_from_init(struct rxe_dev *rxe, struct rxe_srq *srq,
struct ib_srq_init_attr *init, struct ib_udata *udata,
struct rxe_create_srq_resp __user *uresp)
{
struct rxe_queue *q;
int wqe_size;
int err;
srq->ibsrq.event_handler = init->event_handler;
srq->ibsrq.srq_context = init->srq_context;
srq->limit = init->attr.srq_limit;
srq->srq_num = srq->elem.index;
srq->rq.max_wr = init->attr.max_wr;
srq->rq.max_sge = init->attr.max_sge;
wqe_size = sizeof(struct rxe_recv_wqe) +
srq->rq.max_sge*sizeof(struct ib_sge);
spin_lock_init(&srq->rq.producer_lock);
spin_lock_init(&srq->rq.consumer_lock);
q = rxe_queue_init(rxe, &srq->rq.max_wr, wqe_size,
QUEUE_TYPE_FROM_CLIENT);
if (!q) {
rxe_dbg_srq(srq, "Unable to allocate queue\n");
err = -ENOMEM;
goto err_out;
}
err = do_mmap_info(rxe, uresp ? &uresp->mi : NULL, udata, q->buf,
q->buf_size, &q->ip);
if (err) {
rxe_dbg_srq(srq, "Unable to init mmap info for caller\n");
goto err_free;
}
srq->rq.queue = q;
init->attr.max_wr = srq->rq.max_wr;
if (uresp) {
if (copy_to_user(&uresp->srq_num, &srq->srq_num,
sizeof(uresp->srq_num))) {
rxe_queue_cleanup(q);
return -EFAULT;
}
}
return 0;
err_free:
vfree(q->buf);
kfree(q);
err_out:
return err;
}
int rxe_srq_chk_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
struct ib_srq_attr *attr, enum ib_srq_attr_mask mask)
{
if (srq->error) {
rxe_dbg_srq(srq, "in error state\n");
goto err1;
}
if (mask & IB_SRQ_MAX_WR) {
if (attr->max_wr > rxe->attr.max_srq_wr) {
rxe_dbg_srq(srq, "max_wr(%d) > max_srq_wr(%d)\n",
attr->max_wr, rxe->attr.max_srq_wr);
goto err1;
}
if (attr->max_wr <= 0) {
rxe_dbg_srq(srq, "max_wr(%d) <= 0\n", attr->max_wr);
goto err1;
}
if (srq->limit && (attr->max_wr < srq->limit)) {
rxe_dbg_srq(srq, "max_wr (%d) < srq->limit (%d)\n",
attr->max_wr, srq->limit);
goto err1;
}
if (attr->max_wr < RXE_MIN_SRQ_WR)
attr->max_wr = RXE_MIN_SRQ_WR;
}
if (mask & IB_SRQ_LIMIT) {
if (attr->srq_limit > rxe->attr.max_srq_wr) {
rxe_dbg_srq(srq, "srq_limit(%d) > max_srq_wr(%d)\n",
attr->srq_limit, rxe->attr.max_srq_wr);
goto err1;
}
if (attr->srq_limit > srq->rq.queue->buf->index_mask) {
rxe_dbg_srq(srq, "srq_limit (%d) > cur limit(%d)\n",
attr->srq_limit,
srq->rq.queue->buf->index_mask);
goto err1;
}
}
return 0;
err1:
return -EINVAL;
}
int rxe_srq_from_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
struct ib_srq_attr *attr, enum ib_srq_attr_mask mask,
struct rxe_modify_srq_cmd *ucmd, struct ib_udata *udata)
{
struct rxe_queue *q = srq->rq.queue;
struct mminfo __user *mi = NULL;
int wqe_size;
int err;
if (mask & IB_SRQ_MAX_WR) {
/*
* This is completely screwed up, the response is supposed to
* be in the outbuf not like this.
*/
mi = u64_to_user_ptr(ucmd->mmap_info_addr);
wqe_size = sizeof(struct rxe_recv_wqe) +
srq->rq.max_sge*sizeof(struct ib_sge);
err = rxe_queue_resize(q, &attr->max_wr, wqe_size,
udata, mi, &srq->rq.producer_lock,
&srq->rq.consumer_lock);
if (err)
goto err_free;
srq->rq.max_wr = attr->max_wr;
}
if (mask & IB_SRQ_LIMIT)
srq->limit = attr->srq_limit;
return 0;
err_free:
rxe_queue_cleanup(q);
srq->rq.queue = NULL;
return err;
}
void rxe_srq_cleanup(struct rxe_pool_elem *elem)
{
struct rxe_srq *srq = container_of(elem, typeof(*srq), elem);
if (srq->pd)
rxe_put(srq->pd);
if (srq->rq.queue)
rxe_queue_cleanup(srq->rq.queue);
}
| linux-master | drivers/infiniband/sw/rxe/rxe_srq.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include "rxe.h"
static struct workqueue_struct *rxe_wq;
int rxe_alloc_wq(void)
{
rxe_wq = alloc_workqueue("rxe_wq", WQ_UNBOUND, WQ_MAX_ACTIVE);
if (!rxe_wq)
return -ENOMEM;
return 0;
}
void rxe_destroy_wq(void)
{
destroy_workqueue(rxe_wq);
}
/* Check if task is idle i.e. not running, not scheduled in
* work queue and not draining. If so move to busy to
* reserve a slot in do_task() by setting to busy and taking
* a qp reference to cover the gap from now until the task finishes.
* state will move out of busy if task returns a non zero value
* in do_task(). If state is already busy it is raised to armed
* to indicate to do_task that additional pass should be made
* over the task.
* Context: caller should hold task->lock.
* Returns: true if state transitioned from idle to busy else false.
*/
static bool __reserve_if_idle(struct rxe_task *task)
{
WARN_ON(rxe_read(task->qp) <= 0);
if (task->state == TASK_STATE_IDLE) {
rxe_get(task->qp);
task->state = TASK_STATE_BUSY;
task->num_sched++;
return true;
}
if (task->state == TASK_STATE_BUSY)
task->state = TASK_STATE_ARMED;
return false;
}
/* check if task is idle or drained and not currently
* scheduled in the work queue. This routine is
* called by rxe_cleanup_task or rxe_disable_task to
* see if the queue is empty.
* Context: caller should hold task->lock.
* Returns true if done else false.
*/
static bool __is_done(struct rxe_task *task)
{
if (work_pending(&task->work))
return false;
if (task->state == TASK_STATE_IDLE ||
task->state == TASK_STATE_DRAINED) {
return true;
}
return false;
}
/* a locked version of __is_done */
static bool is_done(struct rxe_task *task)
{
unsigned long flags;
int done;
spin_lock_irqsave(&task->lock, flags);
done = __is_done(task);
spin_unlock_irqrestore(&task->lock, flags);
return done;
}
/* do_task is a wrapper for the three tasks (requester,
* completer, responder) and calls them in a loop until
* they return a non-zero value. It is called either
* directly by rxe_run_task or indirectly if rxe_sched_task
* schedules the task. They must call __reserve_if_idle to
* move the task to busy before calling or scheduling.
* The task can also be moved to drained or invalid
* by calls to rxe_cleanup_task or rxe_disable_task.
* In that case tasks which get here are not executed but
* just flushed. The tasks are designed to look to see if
* there is work to do and then do part of it before returning
* here with a return value of zero until all the work
* has been consumed then it returns a non-zero value.
* The number of times the task can be run is limited by
* max iterations so one task cannot hold the cpu forever.
* If the limit is hit and work remains the task is rescheduled.
*/
static void do_task(struct rxe_task *task)
{
unsigned int iterations;
unsigned long flags;
int resched = 0;
int cont;
int ret;
WARN_ON(rxe_read(task->qp) <= 0);
spin_lock_irqsave(&task->lock, flags);
if (task->state >= TASK_STATE_DRAINED) {
rxe_put(task->qp);
task->num_done++;
spin_unlock_irqrestore(&task->lock, flags);
return;
}
spin_unlock_irqrestore(&task->lock, flags);
do {
iterations = RXE_MAX_ITERATIONS;
cont = 0;
do {
ret = task->func(task->qp);
} while (ret == 0 && iterations-- > 0);
spin_lock_irqsave(&task->lock, flags);
/* we're not done yet but we ran out of iterations.
* yield the cpu and reschedule the task
*/
if (!ret) {
task->state = TASK_STATE_IDLE;
resched = 1;
goto exit;
}
switch (task->state) {
case TASK_STATE_BUSY:
task->state = TASK_STATE_IDLE;
break;
/* someone tried to schedule the task while we
* were running, keep going
*/
case TASK_STATE_ARMED:
task->state = TASK_STATE_BUSY;
cont = 1;
break;
case TASK_STATE_DRAINING:
task->state = TASK_STATE_DRAINED;
break;
default:
WARN_ON(1);
rxe_dbg_qp(task->qp, "unexpected task state = %d",
task->state);
task->state = TASK_STATE_IDLE;
}
exit:
if (!cont) {
task->num_done++;
if (WARN_ON(task->num_done != task->num_sched))
rxe_dbg_qp(
task->qp,
"%ld tasks scheduled, %ld tasks done",
task->num_sched, task->num_done);
}
spin_unlock_irqrestore(&task->lock, flags);
} while (cont);
task->ret = ret;
if (resched)
rxe_sched_task(task);
rxe_put(task->qp);
}
/* wrapper around do_task to fix argument for work queue */
static void do_work(struct work_struct *work)
{
do_task(container_of(work, struct rxe_task, work));
}
int rxe_init_task(struct rxe_task *task, struct rxe_qp *qp,
int (*func)(struct rxe_qp *))
{
WARN_ON(rxe_read(qp) <= 0);
task->qp = qp;
task->func = func;
task->state = TASK_STATE_IDLE;
spin_lock_init(&task->lock);
INIT_WORK(&task->work, do_work);
return 0;
}
/* rxe_cleanup_task is only called from rxe_do_qp_cleanup in
* process context. The qp is already completed with no
* remaining references. Once the queue is drained the
* task is moved to invalid and returns. The qp cleanup
* code then calls the task functions directly without
* using the task struct to drain any late arriving packets
* or work requests.
*/
void rxe_cleanup_task(struct rxe_task *task)
{
unsigned long flags;
spin_lock_irqsave(&task->lock, flags);
if (!__is_done(task) && task->state < TASK_STATE_DRAINED) {
task->state = TASK_STATE_DRAINING;
} else {
task->state = TASK_STATE_INVALID;
spin_unlock_irqrestore(&task->lock, flags);
return;
}
spin_unlock_irqrestore(&task->lock, flags);
/* now the task cannot be scheduled or run just wait
* for the previously scheduled tasks to finish.
*/
while (!is_done(task))
cond_resched();
spin_lock_irqsave(&task->lock, flags);
task->state = TASK_STATE_INVALID;
spin_unlock_irqrestore(&task->lock, flags);
}
/* run the task inline if it is currently idle
* cannot call do_task holding the lock
*/
void rxe_run_task(struct rxe_task *task)
{
unsigned long flags;
bool run;
WARN_ON(rxe_read(task->qp) <= 0);
spin_lock_irqsave(&task->lock, flags);
run = __reserve_if_idle(task);
spin_unlock_irqrestore(&task->lock, flags);
if (run)
do_task(task);
}
/* schedule the task to run later as a work queue entry.
* the queue_work call can be called holding
* the lock.
*/
void rxe_sched_task(struct rxe_task *task)
{
unsigned long flags;
WARN_ON(rxe_read(task->qp) <= 0);
spin_lock_irqsave(&task->lock, flags);
if (__reserve_if_idle(task))
queue_work(rxe_wq, &task->work);
spin_unlock_irqrestore(&task->lock, flags);
}
/* rxe_disable/enable_task are only called from
* rxe_modify_qp in process context. Task is moved
* to the drained state by do_task.
*/
void rxe_disable_task(struct rxe_task *task)
{
unsigned long flags;
WARN_ON(rxe_read(task->qp) <= 0);
spin_lock_irqsave(&task->lock, flags);
if (!__is_done(task) && task->state < TASK_STATE_DRAINED) {
task->state = TASK_STATE_DRAINING;
} else {
task->state = TASK_STATE_DRAINED;
spin_unlock_irqrestore(&task->lock, flags);
return;
}
spin_unlock_irqrestore(&task->lock, flags);
while (!is_done(task))
cond_resched();
spin_lock_irqsave(&task->lock, flags);
task->state = TASK_STATE_DRAINED;
spin_unlock_irqrestore(&task->lock, flags);
}
void rxe_enable_task(struct rxe_task *task)
{
unsigned long flags;
WARN_ON(rxe_read(task->qp) <= 0);
spin_lock_irqsave(&task->lock, flags);
if (task->state == TASK_STATE_INVALID) {
spin_unlock_irqrestore(&task->lock, flags);
return;
}
task->state = TASK_STATE_IDLE;
spin_unlock_irqrestore(&task->lock, flags);
}
| linux-master | drivers/infiniband/sw/rxe/rxe_task.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include <linux/dma-mapping.h>
#include <net/addrconf.h>
#include <rdma/uverbs_ioctl.h>
#include "rxe.h"
#include "rxe_queue.h"
#include "rxe_hw_counters.h"
static int post_one_recv(struct rxe_rq *rq, const struct ib_recv_wr *ibwr);
/* dev */
static int rxe_query_device(struct ib_device *ibdev,
struct ib_device_attr *attr,
struct ib_udata *udata)
{
struct rxe_dev *rxe = to_rdev(ibdev);
int err;
if (udata->inlen || udata->outlen) {
rxe_dbg_dev(rxe, "malformed udata");
err = -EINVAL;
goto err_out;
}
memcpy(attr, &rxe->attr, sizeof(*attr));
return 0;
err_out:
rxe_err_dev(rxe, "returned err = %d", err);
return err;
}
static int rxe_query_port(struct ib_device *ibdev,
u32 port_num, struct ib_port_attr *attr)
{
struct rxe_dev *rxe = to_rdev(ibdev);
int err, ret;
if (port_num != 1) {
err = -EINVAL;
rxe_dbg_dev(rxe, "bad port_num = %d", port_num);
goto err_out;
}
memcpy(attr, &rxe->port.attr, sizeof(*attr));
mutex_lock(&rxe->usdev_lock);
ret = ib_get_eth_speed(ibdev, port_num, &attr->active_speed,
&attr->active_width);
if (attr->state == IB_PORT_ACTIVE)
attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
else if (dev_get_flags(rxe->ndev) & IFF_UP)
attr->phys_state = IB_PORT_PHYS_STATE_POLLING;
else
attr->phys_state = IB_PORT_PHYS_STATE_DISABLED;
mutex_unlock(&rxe->usdev_lock);
return ret;
err_out:
rxe_err_dev(rxe, "returned err = %d", err);
return err;
}
static int rxe_query_pkey(struct ib_device *ibdev,
u32 port_num, u16 index, u16 *pkey)
{
struct rxe_dev *rxe = to_rdev(ibdev);
int err;
if (index != 0) {
err = -EINVAL;
rxe_dbg_dev(rxe, "bad pkey index = %d", index);
goto err_out;
}
*pkey = IB_DEFAULT_PKEY_FULL;
return 0;
err_out:
rxe_err_dev(rxe, "returned err = %d", err);
return err;
}
static int rxe_modify_device(struct ib_device *ibdev,
int mask, struct ib_device_modify *attr)
{
struct rxe_dev *rxe = to_rdev(ibdev);
int err;
if (mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
IB_DEVICE_MODIFY_NODE_DESC)) {
err = -EOPNOTSUPP;
rxe_dbg_dev(rxe, "unsupported mask = 0x%x", mask);
goto err_out;
}
if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid);
if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
memcpy(rxe->ib_dev.node_desc,
attr->node_desc, sizeof(rxe->ib_dev.node_desc));
}
return 0;
err_out:
rxe_err_dev(rxe, "returned err = %d", err);
return err;
}
static int rxe_modify_port(struct ib_device *ibdev, u32 port_num,
int mask, struct ib_port_modify *attr)
{
struct rxe_dev *rxe = to_rdev(ibdev);
struct rxe_port *port;
int err;
if (port_num != 1) {
err = -EINVAL;
rxe_dbg_dev(rxe, "bad port_num = %d", port_num);
goto err_out;
}
//TODO is shutdown useful
if (mask & ~(IB_PORT_RESET_QKEY_CNTR)) {
err = -EOPNOTSUPP;
rxe_dbg_dev(rxe, "unsupported mask = 0x%x", mask);
goto err_out;
}
port = &rxe->port;
port->attr.port_cap_flags |= attr->set_port_cap_mask;
port->attr.port_cap_flags &= ~attr->clr_port_cap_mask;
if (mask & IB_PORT_RESET_QKEY_CNTR)
port->attr.qkey_viol_cntr = 0;
return 0;
err_out:
rxe_err_dev(rxe, "returned err = %d", err);
return err;
}
static enum rdma_link_layer rxe_get_link_layer(struct ib_device *ibdev,
u32 port_num)
{
struct rxe_dev *rxe = to_rdev(ibdev);
int err;
if (port_num != 1) {
err = -EINVAL;
rxe_dbg_dev(rxe, "bad port_num = %d", port_num);
goto err_out;
}
return IB_LINK_LAYER_ETHERNET;
err_out:
rxe_err_dev(rxe, "returned err = %d", err);
return err;
}
static int rxe_port_immutable(struct ib_device *ibdev, u32 port_num,
struct ib_port_immutable *immutable)
{
struct rxe_dev *rxe = to_rdev(ibdev);
struct ib_port_attr attr = {};
int err;
if (port_num != 1) {
err = -EINVAL;
rxe_dbg_dev(rxe, "bad port_num = %d", port_num);
goto err_out;
}
err = ib_query_port(ibdev, port_num, &attr);
if (err)
goto err_out;
immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
immutable->pkey_tbl_len = attr.pkey_tbl_len;
immutable->gid_tbl_len = attr.gid_tbl_len;
immutable->max_mad_size = IB_MGMT_MAD_SIZE;
return 0;
err_out:
rxe_err_dev(rxe, "returned err = %d", err);
return err;
}
/* uc */
static int rxe_alloc_ucontext(struct ib_ucontext *ibuc, struct ib_udata *udata)
{
struct rxe_dev *rxe = to_rdev(ibuc->device);
struct rxe_ucontext *uc = to_ruc(ibuc);
int err;
err = rxe_add_to_pool(&rxe->uc_pool, uc);
if (err)
rxe_err_dev(rxe, "unable to create uc");
return err;
}
static void rxe_dealloc_ucontext(struct ib_ucontext *ibuc)
{
struct rxe_ucontext *uc = to_ruc(ibuc);
int err;
err = rxe_cleanup(uc);
if (err)
rxe_err_uc(uc, "cleanup failed, err = %d", err);
}
/* pd */
static int rxe_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
{
struct rxe_dev *rxe = to_rdev(ibpd->device);
struct rxe_pd *pd = to_rpd(ibpd);
int err;
err = rxe_add_to_pool(&rxe->pd_pool, pd);
if (err) {
rxe_dbg_dev(rxe, "unable to alloc pd");
goto err_out;
}
return 0;
err_out:
rxe_err_dev(rxe, "returned err = %d", err);
return err;
}
static int rxe_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
{
struct rxe_pd *pd = to_rpd(ibpd);
int err;
err = rxe_cleanup(pd);
if (err)
rxe_err_pd(pd, "cleanup failed, err = %d", err);
return 0;
}
/* ah */
static int rxe_create_ah(struct ib_ah *ibah,
struct rdma_ah_init_attr *init_attr,
struct ib_udata *udata)
{
struct rxe_dev *rxe = to_rdev(ibah->device);
struct rxe_ah *ah = to_rah(ibah);
struct rxe_create_ah_resp __user *uresp = NULL;
int err, cleanup_err;
if (udata) {
/* test if new user provider */
if (udata->outlen >= sizeof(*uresp))
uresp = udata->outbuf;
ah->is_user = true;
} else {
ah->is_user = false;
}
err = rxe_add_to_pool_ah(&rxe->ah_pool, ah,
init_attr->flags & RDMA_CREATE_AH_SLEEPABLE);
if (err) {
rxe_dbg_dev(rxe, "unable to create ah");
goto err_out;
}
/* create index > 0 */
ah->ah_num = ah->elem.index;
err = rxe_ah_chk_attr(ah, init_attr->ah_attr);
if (err) {
rxe_dbg_ah(ah, "bad attr");
goto err_cleanup;
}
if (uresp) {
/* only if new user provider */
err = copy_to_user(&uresp->ah_num, &ah->ah_num,
sizeof(uresp->ah_num));
if (err) {
err = -EFAULT;
rxe_dbg_ah(ah, "unable to copy to user");
goto err_cleanup;
}
} else if (ah->is_user) {
/* only if old user provider */
ah->ah_num = 0;
}
rxe_init_av(init_attr->ah_attr, &ah->av);
rxe_finalize(ah);
return 0;
err_cleanup:
cleanup_err = rxe_cleanup(ah);
if (cleanup_err)
rxe_err_ah(ah, "cleanup failed, err = %d", cleanup_err);
err_out:
rxe_err_ah(ah, "returned err = %d", err);
return err;
}
static int rxe_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
{
struct rxe_ah *ah = to_rah(ibah);
int err;
err = rxe_ah_chk_attr(ah, attr);
if (err) {
rxe_dbg_ah(ah, "bad attr");
goto err_out;
}
rxe_init_av(attr, &ah->av);
return 0;
err_out:
rxe_err_ah(ah, "returned err = %d", err);
return err;
}
static int rxe_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
{
struct rxe_ah *ah = to_rah(ibah);
memset(attr, 0, sizeof(*attr));
attr->type = ibah->type;
rxe_av_to_attr(&ah->av, attr);
return 0;
}
static int rxe_destroy_ah(struct ib_ah *ibah, u32 flags)
{
struct rxe_ah *ah = to_rah(ibah);
int err;
err = rxe_cleanup_ah(ah, flags & RDMA_DESTROY_AH_SLEEPABLE);
if (err)
rxe_err_ah(ah, "cleanup failed, err = %d", err);
return 0;
}
/* srq */
static int rxe_create_srq(struct ib_srq *ibsrq, struct ib_srq_init_attr *init,
struct ib_udata *udata)
{
struct rxe_dev *rxe = to_rdev(ibsrq->device);
struct rxe_pd *pd = to_rpd(ibsrq->pd);
struct rxe_srq *srq = to_rsrq(ibsrq);
struct rxe_create_srq_resp __user *uresp = NULL;
int err, cleanup_err;
if (udata) {
if (udata->outlen < sizeof(*uresp)) {
err = -EINVAL;
rxe_err_dev(rxe, "malformed udata");
goto err_out;
}
uresp = udata->outbuf;
}
if (init->srq_type != IB_SRQT_BASIC) {
err = -EOPNOTSUPP;
rxe_dbg_dev(rxe, "srq type = %d, not supported",
init->srq_type);
goto err_out;
}
err = rxe_srq_chk_init(rxe, init);
if (err) {
rxe_dbg_dev(rxe, "invalid init attributes");
goto err_out;
}
err = rxe_add_to_pool(&rxe->srq_pool, srq);
if (err) {
rxe_dbg_dev(rxe, "unable to create srq, err = %d", err);
goto err_out;
}
rxe_get(pd);
srq->pd = pd;
err = rxe_srq_from_init(rxe, srq, init, udata, uresp);
if (err) {
rxe_dbg_srq(srq, "create srq failed, err = %d", err);
goto err_cleanup;
}
return 0;
err_cleanup:
cleanup_err = rxe_cleanup(srq);
if (cleanup_err)
rxe_err_srq(srq, "cleanup failed, err = %d", cleanup_err);
err_out:
rxe_err_dev(rxe, "returned err = %d", err);
return err;
}
static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
enum ib_srq_attr_mask mask,
struct ib_udata *udata)
{
struct rxe_srq *srq = to_rsrq(ibsrq);
struct rxe_dev *rxe = to_rdev(ibsrq->device);
struct rxe_modify_srq_cmd cmd = {};
int err;
if (udata) {
if (udata->inlen < sizeof(cmd)) {
err = -EINVAL;
rxe_dbg_srq(srq, "malformed udata");
goto err_out;
}
err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
if (err) {
err = -EFAULT;
rxe_dbg_srq(srq, "unable to read udata");
goto err_out;
}
}
err = rxe_srq_chk_attr(rxe, srq, attr, mask);
if (err) {
rxe_dbg_srq(srq, "bad init attributes");
goto err_out;
}
err = rxe_srq_from_attr(rxe, srq, attr, mask, &cmd, udata);
if (err) {
rxe_dbg_srq(srq, "bad attr");
goto err_out;
}
return 0;
err_out:
rxe_err_srq(srq, "returned err = %d", err);
return err;
}
static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
{
struct rxe_srq *srq = to_rsrq(ibsrq);
int err;
if (srq->error) {
err = -EINVAL;
rxe_dbg_srq(srq, "srq in error state");
goto err_out;
}
attr->max_wr = srq->rq.queue->buf->index_mask;
attr->max_sge = srq->rq.max_sge;
attr->srq_limit = srq->limit;
return 0;
err_out:
rxe_err_srq(srq, "returned err = %d", err);
return err;
}
static int rxe_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr,
const struct ib_recv_wr **bad_wr)
{
int err = 0;
struct rxe_srq *srq = to_rsrq(ibsrq);
unsigned long flags;
spin_lock_irqsave(&srq->rq.producer_lock, flags);
while (wr) {
err = post_one_recv(&srq->rq, wr);
if (unlikely(err))
break;
wr = wr->next;
}
spin_unlock_irqrestore(&srq->rq.producer_lock, flags);
if (err) {
*bad_wr = wr;
rxe_err_srq(srq, "returned err = %d", err);
}
return err;
}
static int rxe_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata)
{
struct rxe_srq *srq = to_rsrq(ibsrq);
int err;
err = rxe_cleanup(srq);
if (err)
rxe_err_srq(srq, "cleanup failed, err = %d", err);
return 0;
}
/* qp */
static int rxe_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init,
struct ib_udata *udata)
{
struct rxe_dev *rxe = to_rdev(ibqp->device);
struct rxe_pd *pd = to_rpd(ibqp->pd);
struct rxe_qp *qp = to_rqp(ibqp);
struct rxe_create_qp_resp __user *uresp = NULL;
int err, cleanup_err;
if (udata) {
if (udata->inlen) {
err = -EINVAL;
rxe_dbg_dev(rxe, "malformed udata, err = %d", err);
goto err_out;
}
if (udata->outlen < sizeof(*uresp)) {
err = -EINVAL;
rxe_dbg_dev(rxe, "malformed udata, err = %d", err);
goto err_out;
}
qp->is_user = true;
uresp = udata->outbuf;
} else {
qp->is_user = false;
}
if (init->create_flags) {
err = -EOPNOTSUPP;
rxe_dbg_dev(rxe, "unsupported create_flags, err = %d", err);
goto err_out;
}
err = rxe_qp_chk_init(rxe, init);
if (err) {
rxe_dbg_dev(rxe, "bad init attr, err = %d", err);
goto err_out;
}
err = rxe_add_to_pool(&rxe->qp_pool, qp);
if (err) {
rxe_dbg_dev(rxe, "unable to create qp, err = %d", err);
goto err_out;
}
err = rxe_qp_from_init(rxe, qp, pd, init, uresp, ibqp->pd, udata);
if (err) {
rxe_dbg_qp(qp, "create qp failed, err = %d", err);
goto err_cleanup;
}
rxe_finalize(qp);
return 0;
err_cleanup:
cleanup_err = rxe_cleanup(qp);
if (cleanup_err)
rxe_err_qp(qp, "cleanup failed, err = %d", cleanup_err);
err_out:
rxe_err_dev(rxe, "returned err = %d", err);
return err;
}
static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int mask, struct ib_udata *udata)
{
struct rxe_dev *rxe = to_rdev(ibqp->device);
struct rxe_qp *qp = to_rqp(ibqp);
int err;
if (mask & ~IB_QP_ATTR_STANDARD_BITS) {
err = -EOPNOTSUPP;
rxe_dbg_qp(qp, "unsupported mask = 0x%x, err = %d",
mask, err);
goto err_out;
}
err = rxe_qp_chk_attr(rxe, qp, attr, mask);
if (err) {
rxe_dbg_qp(qp, "bad mask/attr, err = %d", err);
goto err_out;
}
err = rxe_qp_from_attr(qp, attr, mask, udata);
if (err) {
rxe_dbg_qp(qp, "modify qp failed, err = %d", err);
goto err_out;
}
if ((mask & IB_QP_AV) && (attr->ah_attr.ah_flags & IB_AH_GRH))
qp->src_port = rdma_get_udp_sport(attr->ah_attr.grh.flow_label,
qp->ibqp.qp_num,
qp->attr.dest_qp_num);
return 0;
err_out:
rxe_err_qp(qp, "returned err = %d", err);
return err;
}
static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int mask, struct ib_qp_init_attr *init)
{
struct rxe_qp *qp = to_rqp(ibqp);
rxe_qp_to_init(qp, init);
rxe_qp_to_attr(qp, attr, mask);
return 0;
}
static int rxe_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
{
struct rxe_qp *qp = to_rqp(ibqp);
int err;
err = rxe_qp_chk_destroy(qp);
if (err) {
rxe_dbg_qp(qp, "unable to destroy qp, err = %d", err);
goto err_out;
}
err = rxe_cleanup(qp);
if (err)
rxe_err_qp(qp, "cleanup failed, err = %d", err);
return 0;
err_out:
rxe_err_qp(qp, "returned err = %d", err);
return err;
}
/* send wr */
/* sanity check incoming send work request */
static int validate_send_wr(struct rxe_qp *qp, const struct ib_send_wr *ibwr,
unsigned int *maskp, unsigned int *lengthp)
{
int num_sge = ibwr->num_sge;
struct rxe_sq *sq = &qp->sq;
unsigned int mask = 0;
unsigned long length = 0;
int err = -EINVAL;
int i;
do {
mask = wr_opcode_mask(ibwr->opcode, qp);
if (!mask) {
rxe_err_qp(qp, "bad wr opcode for qp type");
break;
}
if (num_sge > sq->max_sge) {
rxe_err_qp(qp, "num_sge > max_sge");
break;
}
length = 0;
for (i = 0; i < ibwr->num_sge; i++)
length += ibwr->sg_list[i].length;
if (length > (1UL << 31)) {
rxe_err_qp(qp, "message length too long");
break;
}
if (mask & WR_ATOMIC_MASK) {
if (length != 8) {
rxe_err_qp(qp, "atomic length != 8");
break;
}
if (atomic_wr(ibwr)->remote_addr & 0x7) {
rxe_err_qp(qp, "misaligned atomic address");
break;
}
}
if (ibwr->send_flags & IB_SEND_INLINE) {
if (!(mask & WR_INLINE_MASK)) {
rxe_err_qp(qp, "opcode doesn't support inline data");
break;
}
if (length > sq->max_inline) {
rxe_err_qp(qp, "inline length too big");
break;
}
}
err = 0;
} while (0);
*maskp = mask;
*lengthp = (int)length;
return err;
}
static int init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr,
const struct ib_send_wr *ibwr)
{
wr->wr_id = ibwr->wr_id;
wr->opcode = ibwr->opcode;
wr->send_flags = ibwr->send_flags;
if (qp_type(qp) == IB_QPT_UD ||
qp_type(qp) == IB_QPT_GSI) {
struct ib_ah *ibah = ud_wr(ibwr)->ah;
wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn;
wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey;
wr->wr.ud.ah_num = to_rah(ibah)->ah_num;
if (qp_type(qp) == IB_QPT_GSI)
wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index;
switch (wr->opcode) {
case IB_WR_SEND_WITH_IMM:
wr->ex.imm_data = ibwr->ex.imm_data;
break;
case IB_WR_SEND:
break;
default:
rxe_err_qp(qp, "bad wr opcode %d for UD/GSI QP",
wr->opcode);
return -EINVAL;
}
} else {
switch (wr->opcode) {
case IB_WR_RDMA_WRITE_WITH_IMM:
wr->ex.imm_data = ibwr->ex.imm_data;
fallthrough;
case IB_WR_RDMA_READ:
case IB_WR_RDMA_WRITE:
wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr;
wr->wr.rdma.rkey = rdma_wr(ibwr)->rkey;
break;
case IB_WR_SEND_WITH_IMM:
wr->ex.imm_data = ibwr->ex.imm_data;
break;
case IB_WR_SEND_WITH_INV:
wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
break;
case IB_WR_RDMA_READ_WITH_INV:
wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr;
wr->wr.rdma.rkey = rdma_wr(ibwr)->rkey;
break;
case IB_WR_ATOMIC_CMP_AND_SWP:
case IB_WR_ATOMIC_FETCH_AND_ADD:
wr->wr.atomic.remote_addr =
atomic_wr(ibwr)->remote_addr;
wr->wr.atomic.compare_add =
atomic_wr(ibwr)->compare_add;
wr->wr.atomic.swap = atomic_wr(ibwr)->swap;
wr->wr.atomic.rkey = atomic_wr(ibwr)->rkey;
break;
case IB_WR_LOCAL_INV:
wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
break;
case IB_WR_REG_MR:
wr->wr.reg.mr = reg_wr(ibwr)->mr;
wr->wr.reg.key = reg_wr(ibwr)->key;
wr->wr.reg.access = reg_wr(ibwr)->access;
break;
case IB_WR_SEND:
case IB_WR_BIND_MW:
case IB_WR_FLUSH:
case IB_WR_ATOMIC_WRITE:
break;
default:
rxe_err_qp(qp, "unsupported wr opcode %d",
wr->opcode);
return -EINVAL;
}
}
return 0;
}
static void copy_inline_data_to_wqe(struct rxe_send_wqe *wqe,
const struct ib_send_wr *ibwr)
{
struct ib_sge *sge = ibwr->sg_list;
u8 *p = wqe->dma.inline_data;
int i;
for (i = 0; i < ibwr->num_sge; i++, sge++) {
memcpy(p, ib_virt_dma_to_page(sge->addr), sge->length);
p += sge->length;
}
}
static int init_send_wqe(struct rxe_qp *qp, const struct ib_send_wr *ibwr,
unsigned int mask, unsigned int length,
struct rxe_send_wqe *wqe)
{
int num_sge = ibwr->num_sge;
int err;
err = init_send_wr(qp, &wqe->wr, ibwr);
if (err)
return err;
/* local operation */
if (unlikely(mask & WR_LOCAL_OP_MASK)) {
wqe->mask = mask;
wqe->state = wqe_state_posted;
return 0;
}
if (unlikely(ibwr->send_flags & IB_SEND_INLINE))
copy_inline_data_to_wqe(wqe, ibwr);
else
memcpy(wqe->dma.sge, ibwr->sg_list,
num_sge * sizeof(struct ib_sge));
wqe->iova = mask & WR_ATOMIC_MASK ? atomic_wr(ibwr)->remote_addr :
mask & WR_READ_OR_WRITE_MASK ? rdma_wr(ibwr)->remote_addr : 0;
wqe->mask = mask;
wqe->dma.length = length;
wqe->dma.resid = length;
wqe->dma.num_sge = num_sge;
wqe->dma.cur_sge = 0;
wqe->dma.sge_offset = 0;
wqe->state = wqe_state_posted;
wqe->ssn = atomic_add_return(1, &qp->ssn);
return 0;
}
static int post_one_send(struct rxe_qp *qp, const struct ib_send_wr *ibwr)
{
int err;
struct rxe_sq *sq = &qp->sq;
struct rxe_send_wqe *send_wqe;
unsigned int mask;
unsigned int length;
int full;
err = validate_send_wr(qp, ibwr, &mask, &length);
if (err)
return err;
full = queue_full(sq->queue, QUEUE_TYPE_FROM_ULP);
if (unlikely(full)) {
rxe_err_qp(qp, "send queue full");
return -ENOMEM;
}
send_wqe = queue_producer_addr(sq->queue, QUEUE_TYPE_FROM_ULP);
err = init_send_wqe(qp, ibwr, mask, length, send_wqe);
if (!err)
queue_advance_producer(sq->queue, QUEUE_TYPE_FROM_ULP);
return err;
}
static int rxe_post_send_kernel(struct rxe_qp *qp,
const struct ib_send_wr *ibwr,
const struct ib_send_wr **bad_wr)
{
int err = 0;
unsigned long flags;
spin_lock_irqsave(&qp->sq.sq_lock, flags);
while (ibwr) {
err = post_one_send(qp, ibwr);
if (err) {
*bad_wr = ibwr;
break;
}
ibwr = ibwr->next;
}
spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
if (!err)
rxe_sched_task(&qp->req.task);
spin_lock_irqsave(&qp->state_lock, flags);
if (qp_state(qp) == IB_QPS_ERR)
rxe_sched_task(&qp->comp.task);
spin_unlock_irqrestore(&qp->state_lock, flags);
return err;
}
static int rxe_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
const struct ib_send_wr **bad_wr)
{
struct rxe_qp *qp = to_rqp(ibqp);
int err;
unsigned long flags;
spin_lock_irqsave(&qp->state_lock, flags);
/* caller has already called destroy_qp */
if (WARN_ON_ONCE(!qp->valid)) {
spin_unlock_irqrestore(&qp->state_lock, flags);
rxe_err_qp(qp, "qp has been destroyed");
return -EINVAL;
}
if (unlikely(qp_state(qp) < IB_QPS_RTS)) {
spin_unlock_irqrestore(&qp->state_lock, flags);
*bad_wr = wr;
rxe_err_qp(qp, "qp not ready to send");
return -EINVAL;
}
spin_unlock_irqrestore(&qp->state_lock, flags);
if (qp->is_user) {
/* Utilize process context to do protocol processing */
rxe_run_task(&qp->req.task);
} else {
err = rxe_post_send_kernel(qp, wr, bad_wr);
if (err)
return err;
}
return 0;
}
/* recv wr */
static int post_one_recv(struct rxe_rq *rq, const struct ib_recv_wr *ibwr)
{
int i;
unsigned long length;
struct rxe_recv_wqe *recv_wqe;
int num_sge = ibwr->num_sge;
int full;
int err;
full = queue_full(rq->queue, QUEUE_TYPE_FROM_ULP);
if (unlikely(full)) {
err = -ENOMEM;
rxe_dbg("queue full");
goto err_out;
}
if (unlikely(num_sge > rq->max_sge)) {
err = -EINVAL;
rxe_dbg("bad num_sge > max_sge");
goto err_out;
}
length = 0;
for (i = 0; i < num_sge; i++)
length += ibwr->sg_list[i].length;
/* IBA max message size is 2^31 */
if (length >= (1UL<<31)) {
err = -EINVAL;
rxe_dbg("message length too long");
goto err_out;
}
recv_wqe = queue_producer_addr(rq->queue, QUEUE_TYPE_FROM_ULP);
recv_wqe->wr_id = ibwr->wr_id;
recv_wqe->dma.length = length;
recv_wqe->dma.resid = length;
recv_wqe->dma.num_sge = num_sge;
recv_wqe->dma.cur_sge = 0;
recv_wqe->dma.sge_offset = 0;
memcpy(recv_wqe->dma.sge, ibwr->sg_list,
num_sge * sizeof(struct ib_sge));
queue_advance_producer(rq->queue, QUEUE_TYPE_FROM_ULP);
return 0;
err_out:
rxe_dbg("returned err = %d", err);
return err;
}
static int rxe_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
const struct ib_recv_wr **bad_wr)
{
int err = 0;
struct rxe_qp *qp = to_rqp(ibqp);
struct rxe_rq *rq = &qp->rq;
unsigned long flags;
spin_lock_irqsave(&qp->state_lock, flags);
/* caller has already called destroy_qp */
if (WARN_ON_ONCE(!qp->valid)) {
spin_unlock_irqrestore(&qp->state_lock, flags);
rxe_err_qp(qp, "qp has been destroyed");
return -EINVAL;
}
/* see C10-97.2.1 */
if (unlikely((qp_state(qp) < IB_QPS_INIT))) {
spin_unlock_irqrestore(&qp->state_lock, flags);
*bad_wr = wr;
rxe_dbg_qp(qp, "qp not ready to post recv");
return -EINVAL;
}
spin_unlock_irqrestore(&qp->state_lock, flags);
if (unlikely(qp->srq)) {
*bad_wr = wr;
rxe_dbg_qp(qp, "qp has srq, use post_srq_recv instead");
return -EINVAL;
}
spin_lock_irqsave(&rq->producer_lock, flags);
while (wr) {
err = post_one_recv(rq, wr);
if (unlikely(err)) {
*bad_wr = wr;
break;
}
wr = wr->next;
}
spin_unlock_irqrestore(&rq->producer_lock, flags);
spin_lock_irqsave(&qp->state_lock, flags);
if (qp_state(qp) == IB_QPS_ERR)
rxe_sched_task(&qp->resp.task);
spin_unlock_irqrestore(&qp->state_lock, flags);
return err;
}
/* cq */
static int rxe_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
struct ib_udata *udata)
{
struct ib_device *dev = ibcq->device;
struct rxe_dev *rxe = to_rdev(dev);
struct rxe_cq *cq = to_rcq(ibcq);
struct rxe_create_cq_resp __user *uresp = NULL;
int err, cleanup_err;
if (udata) {
if (udata->outlen < sizeof(*uresp)) {
err = -EINVAL;
rxe_dbg_dev(rxe, "malformed udata, err = %d", err);
goto err_out;
}
uresp = udata->outbuf;
}
if (attr->flags) {
err = -EOPNOTSUPP;
rxe_dbg_dev(rxe, "bad attr->flags, err = %d", err);
goto err_out;
}
err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector);
if (err) {
rxe_dbg_dev(rxe, "bad init attributes, err = %d", err);
goto err_out;
}
err = rxe_add_to_pool(&rxe->cq_pool, cq);
if (err) {
rxe_dbg_dev(rxe, "unable to create cq, err = %d", err);
goto err_out;
}
err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector, udata,
uresp);
if (err) {
rxe_dbg_cq(cq, "create cq failed, err = %d", err);
goto err_cleanup;
}
return 0;
err_cleanup:
cleanup_err = rxe_cleanup(cq);
if (cleanup_err)
rxe_err_cq(cq, "cleanup failed, err = %d", cleanup_err);
err_out:
rxe_err_dev(rxe, "returned err = %d", err);
return err;
}
static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
{
struct rxe_cq *cq = to_rcq(ibcq);
struct rxe_dev *rxe = to_rdev(ibcq->device);
struct rxe_resize_cq_resp __user *uresp = NULL;
int err;
if (udata) {
if (udata->outlen < sizeof(*uresp)) {
err = -EINVAL;
rxe_dbg_cq(cq, "malformed udata");
goto err_out;
}
uresp = udata->outbuf;
}
err = rxe_cq_chk_attr(rxe, cq, cqe, 0);
if (err) {
rxe_dbg_cq(cq, "bad attr, err = %d", err);
goto err_out;
}
err = rxe_cq_resize_queue(cq, cqe, uresp, udata);
if (err) {
rxe_dbg_cq(cq, "resize cq failed, err = %d", err);
goto err_out;
}
return 0;
err_out:
rxe_err_cq(cq, "returned err = %d", err);
return err;
}
static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
{
int i;
struct rxe_cq *cq = to_rcq(ibcq);
struct rxe_cqe *cqe;
unsigned long flags;
spin_lock_irqsave(&cq->cq_lock, flags);
for (i = 0; i < num_entries; i++) {
cqe = queue_head(cq->queue, QUEUE_TYPE_TO_ULP);
if (!cqe)
break; /* queue empty */
memcpy(wc++, &cqe->ibwc, sizeof(*wc));
queue_advance_consumer(cq->queue, QUEUE_TYPE_TO_ULP);
}
spin_unlock_irqrestore(&cq->cq_lock, flags);
return i;
}
static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt)
{
struct rxe_cq *cq = to_rcq(ibcq);
int count;
count = queue_count(cq->queue, QUEUE_TYPE_TO_ULP);
return (count > wc_cnt) ? wc_cnt : count;
}
static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
{
struct rxe_cq *cq = to_rcq(ibcq);
int ret = 0;
int empty;
unsigned long irq_flags;
spin_lock_irqsave(&cq->cq_lock, irq_flags);
cq->notify |= flags & IB_CQ_SOLICITED_MASK;
empty = queue_empty(cq->queue, QUEUE_TYPE_TO_ULP);
if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !empty)
ret = 1;
spin_unlock_irqrestore(&cq->cq_lock, irq_flags);
return ret;
}
static int rxe_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
{
struct rxe_cq *cq = to_rcq(ibcq);
int err;
/* See IBA C11-17: The CI shall return an error if this Verb is
* invoked while a Work Queue is still associated with the CQ.
*/
if (atomic_read(&cq->num_wq)) {
err = -EINVAL;
rxe_dbg_cq(cq, "still in use");
goto err_out;
}
err = rxe_cleanup(cq);
if (err)
rxe_err_cq(cq, "cleanup failed, err = %d", err);
return 0;
err_out:
rxe_err_cq(cq, "returned err = %d", err);
return err;
}
/* mr */
static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access)
{
struct rxe_dev *rxe = to_rdev(ibpd->device);
struct rxe_pd *pd = to_rpd(ibpd);
struct rxe_mr *mr;
int err;
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
err = rxe_add_to_pool(&rxe->mr_pool, mr);
if (err) {
rxe_dbg_dev(rxe, "unable to create mr");
goto err_free;
}
rxe_get(pd);
mr->ibmr.pd = ibpd;
mr->ibmr.device = ibpd->device;
rxe_mr_init_dma(access, mr);
rxe_finalize(mr);
return &mr->ibmr;
err_free:
kfree(mr);
rxe_err_pd(pd, "returned err = %d", err);
return ERR_PTR(err);
}
static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd, u64 start,
u64 length, u64 iova, int access,
struct ib_udata *udata)
{
struct rxe_dev *rxe = to_rdev(ibpd->device);
struct rxe_pd *pd = to_rpd(ibpd);
struct rxe_mr *mr;
int err, cleanup_err;
if (access & ~RXE_ACCESS_SUPPORTED_MR) {
rxe_err_pd(pd, "access = %#x not supported (%#x)", access,
RXE_ACCESS_SUPPORTED_MR);
return ERR_PTR(-EOPNOTSUPP);
}
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
err = rxe_add_to_pool(&rxe->mr_pool, mr);
if (err) {
rxe_dbg_pd(pd, "unable to create mr");
goto err_free;
}
rxe_get(pd);
mr->ibmr.pd = ibpd;
mr->ibmr.device = ibpd->device;
err = rxe_mr_init_user(rxe, start, length, iova, access, mr);
if (err) {
rxe_dbg_mr(mr, "reg_user_mr failed, err = %d", err);
goto err_cleanup;
}
rxe_finalize(mr);
return &mr->ibmr;
err_cleanup:
cleanup_err = rxe_cleanup(mr);
if (cleanup_err)
rxe_err_mr(mr, "cleanup failed, err = %d", cleanup_err);
err_free:
kfree(mr);
rxe_err_pd(pd, "returned err = %d", err);
return ERR_PTR(err);
}
static struct ib_mr *rxe_rereg_user_mr(struct ib_mr *ibmr, int flags,
u64 start, u64 length, u64 iova,
int access, struct ib_pd *ibpd,
struct ib_udata *udata)
{
struct rxe_mr *mr = to_rmr(ibmr);
struct rxe_pd *old_pd = to_rpd(ibmr->pd);
struct rxe_pd *pd = to_rpd(ibpd);
/* for now only support the two easy cases:
* rereg_pd and rereg_access
*/
if (flags & ~RXE_MR_REREG_SUPPORTED) {
rxe_err_mr(mr, "flags = %#x not supported", flags);
return ERR_PTR(-EOPNOTSUPP);
}
if (flags & IB_MR_REREG_PD) {
rxe_put(old_pd);
rxe_get(pd);
mr->ibmr.pd = ibpd;
}
if (flags & IB_MR_REREG_ACCESS) {
if (access & ~RXE_ACCESS_SUPPORTED_MR) {
rxe_err_mr(mr, "access = %#x not supported", access);
return ERR_PTR(-EOPNOTSUPP);
}
mr->access = access;
}
return NULL;
}
static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type,
u32 max_num_sg)
{
struct rxe_dev *rxe = to_rdev(ibpd->device);
struct rxe_pd *pd = to_rpd(ibpd);
struct rxe_mr *mr;
int err, cleanup_err;
if (mr_type != IB_MR_TYPE_MEM_REG) {
err = -EINVAL;
rxe_dbg_pd(pd, "mr type %d not supported, err = %d",
mr_type, err);
goto err_out;
}
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
err = rxe_add_to_pool(&rxe->mr_pool, mr);
if (err)
goto err_free;
rxe_get(pd);
mr->ibmr.pd = ibpd;
mr->ibmr.device = ibpd->device;
err = rxe_mr_init_fast(max_num_sg, mr);
if (err) {
rxe_dbg_mr(mr, "alloc_mr failed, err = %d", err);
goto err_cleanup;
}
rxe_finalize(mr);
return &mr->ibmr;
err_cleanup:
cleanup_err = rxe_cleanup(mr);
if (cleanup_err)
rxe_err_mr(mr, "cleanup failed, err = %d", err);
err_free:
kfree(mr);
err_out:
rxe_err_pd(pd, "returned err = %d", err);
return ERR_PTR(err);
}
static int rxe_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
{
struct rxe_mr *mr = to_rmr(ibmr);
int err, cleanup_err;
/* See IBA 10.6.7.2.6 */
if (atomic_read(&mr->num_mw) > 0) {
err = -EINVAL;
rxe_dbg_mr(mr, "mr has mw's bound");
goto err_out;
}
cleanup_err = rxe_cleanup(mr);
if (cleanup_err)
rxe_err_mr(mr, "cleanup failed, err = %d", cleanup_err);
kfree_rcu_mightsleep(mr);
return 0;
err_out:
rxe_err_mr(mr, "returned err = %d", err);
return err;
}
static ssize_t parent_show(struct device *device,
struct device_attribute *attr, char *buf)
{
struct rxe_dev *rxe =
rdma_device_to_drv_device(device, struct rxe_dev, ib_dev);
return sysfs_emit(buf, "%s\n", rxe_parent_name(rxe, 1));
}
static DEVICE_ATTR_RO(parent);
static struct attribute *rxe_dev_attributes[] = {
&dev_attr_parent.attr,
NULL
};
static const struct attribute_group rxe_attr_group = {
.attrs = rxe_dev_attributes,
};
static int rxe_enable_driver(struct ib_device *ib_dev)
{
struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev);
rxe_set_port_state(rxe);
dev_info(&rxe->ib_dev.dev, "added %s\n", netdev_name(rxe->ndev));
return 0;
}
static const struct ib_device_ops rxe_dev_ops = {
.owner = THIS_MODULE,
.driver_id = RDMA_DRIVER_RXE,
.uverbs_abi_ver = RXE_UVERBS_ABI_VERSION,
.alloc_hw_port_stats = rxe_ib_alloc_hw_port_stats,
.alloc_mr = rxe_alloc_mr,
.alloc_mw = rxe_alloc_mw,
.alloc_pd = rxe_alloc_pd,
.alloc_ucontext = rxe_alloc_ucontext,
.attach_mcast = rxe_attach_mcast,
.create_ah = rxe_create_ah,
.create_cq = rxe_create_cq,
.create_qp = rxe_create_qp,
.create_srq = rxe_create_srq,
.create_user_ah = rxe_create_ah,
.dealloc_driver = rxe_dealloc,
.dealloc_mw = rxe_dealloc_mw,
.dealloc_pd = rxe_dealloc_pd,
.dealloc_ucontext = rxe_dealloc_ucontext,
.dereg_mr = rxe_dereg_mr,
.destroy_ah = rxe_destroy_ah,
.destroy_cq = rxe_destroy_cq,
.destroy_qp = rxe_destroy_qp,
.destroy_srq = rxe_destroy_srq,
.detach_mcast = rxe_detach_mcast,
.device_group = &rxe_attr_group,
.enable_driver = rxe_enable_driver,
.get_dma_mr = rxe_get_dma_mr,
.get_hw_stats = rxe_ib_get_hw_stats,
.get_link_layer = rxe_get_link_layer,
.get_port_immutable = rxe_port_immutable,
.map_mr_sg = rxe_map_mr_sg,
.mmap = rxe_mmap,
.modify_ah = rxe_modify_ah,
.modify_device = rxe_modify_device,
.modify_port = rxe_modify_port,
.modify_qp = rxe_modify_qp,
.modify_srq = rxe_modify_srq,
.peek_cq = rxe_peek_cq,
.poll_cq = rxe_poll_cq,
.post_recv = rxe_post_recv,
.post_send = rxe_post_send,
.post_srq_recv = rxe_post_srq_recv,
.query_ah = rxe_query_ah,
.query_device = rxe_query_device,
.query_pkey = rxe_query_pkey,
.query_port = rxe_query_port,
.query_qp = rxe_query_qp,
.query_srq = rxe_query_srq,
.reg_user_mr = rxe_reg_user_mr,
.req_notify_cq = rxe_req_notify_cq,
.rereg_user_mr = rxe_rereg_user_mr,
.resize_cq = rxe_resize_cq,
INIT_RDMA_OBJ_SIZE(ib_ah, rxe_ah, ibah),
INIT_RDMA_OBJ_SIZE(ib_cq, rxe_cq, ibcq),
INIT_RDMA_OBJ_SIZE(ib_pd, rxe_pd, ibpd),
INIT_RDMA_OBJ_SIZE(ib_qp, rxe_qp, ibqp),
INIT_RDMA_OBJ_SIZE(ib_srq, rxe_srq, ibsrq),
INIT_RDMA_OBJ_SIZE(ib_ucontext, rxe_ucontext, ibuc),
INIT_RDMA_OBJ_SIZE(ib_mw, rxe_mw, ibmw),
};
int rxe_register_device(struct rxe_dev *rxe, const char *ibdev_name)
{
int err;
struct ib_device *dev = &rxe->ib_dev;
strscpy(dev->node_desc, "rxe", sizeof(dev->node_desc));
dev->node_type = RDMA_NODE_IB_CA;
dev->phys_port_cnt = 1;
dev->num_comp_vectors = num_possible_cpus();
dev->local_dma_lkey = 0;
addrconf_addr_eui48((unsigned char *)&dev->node_guid,
rxe->ndev->dev_addr);
dev->uverbs_cmd_mask |= BIT_ULL(IB_USER_VERBS_CMD_POST_SEND) |
BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ);
ib_set_device_ops(dev, &rxe_dev_ops);
err = ib_device_set_netdev(&rxe->ib_dev, rxe->ndev, 1);
if (err)
return err;
err = rxe_icrc_init(rxe);
if (err)
return err;
err = ib_register_device(dev, ibdev_name, NULL);
if (err)
rxe_dbg_dev(rxe, "failed with error %d\n", err);
/*
* Note that rxe may be invalid at this point if another thread
* unregistered it.
*/
return err;
}
| linux-master | drivers/infiniband/sw/rxe/rxe_verbs.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include <linux/skbuff.h>
#include "rxe.h"
#include "rxe_loc.h"
#include "rxe_queue.h"
static char *resp_state_name[] = {
[RESPST_NONE] = "NONE",
[RESPST_GET_REQ] = "GET_REQ",
[RESPST_CHK_PSN] = "CHK_PSN",
[RESPST_CHK_OP_SEQ] = "CHK_OP_SEQ",
[RESPST_CHK_OP_VALID] = "CHK_OP_VALID",
[RESPST_CHK_RESOURCE] = "CHK_RESOURCE",
[RESPST_CHK_LENGTH] = "CHK_LENGTH",
[RESPST_CHK_RKEY] = "CHK_RKEY",
[RESPST_EXECUTE] = "EXECUTE",
[RESPST_READ_REPLY] = "READ_REPLY",
[RESPST_ATOMIC_REPLY] = "ATOMIC_REPLY",
[RESPST_ATOMIC_WRITE_REPLY] = "ATOMIC_WRITE_REPLY",
[RESPST_PROCESS_FLUSH] = "PROCESS_FLUSH",
[RESPST_COMPLETE] = "COMPLETE",
[RESPST_ACKNOWLEDGE] = "ACKNOWLEDGE",
[RESPST_CLEANUP] = "CLEANUP",
[RESPST_DUPLICATE_REQUEST] = "DUPLICATE_REQUEST",
[RESPST_ERR_MALFORMED_WQE] = "ERR_MALFORMED_WQE",
[RESPST_ERR_UNSUPPORTED_OPCODE] = "ERR_UNSUPPORTED_OPCODE",
[RESPST_ERR_MISALIGNED_ATOMIC] = "ERR_MISALIGNED_ATOMIC",
[RESPST_ERR_PSN_OUT_OF_SEQ] = "ERR_PSN_OUT_OF_SEQ",
[RESPST_ERR_MISSING_OPCODE_FIRST] = "ERR_MISSING_OPCODE_FIRST",
[RESPST_ERR_MISSING_OPCODE_LAST_C] = "ERR_MISSING_OPCODE_LAST_C",
[RESPST_ERR_MISSING_OPCODE_LAST_D1E] = "ERR_MISSING_OPCODE_LAST_D1E",
[RESPST_ERR_TOO_MANY_RDMA_ATM_REQ] = "ERR_TOO_MANY_RDMA_ATM_REQ",
[RESPST_ERR_RNR] = "ERR_RNR",
[RESPST_ERR_RKEY_VIOLATION] = "ERR_RKEY_VIOLATION",
[RESPST_ERR_INVALIDATE_RKEY] = "ERR_INVALIDATE_RKEY_VIOLATION",
[RESPST_ERR_LENGTH] = "ERR_LENGTH",
[RESPST_ERR_CQ_OVERFLOW] = "ERR_CQ_OVERFLOW",
[RESPST_ERROR] = "ERROR",
[RESPST_DONE] = "DONE",
[RESPST_EXIT] = "EXIT",
};
/* rxe_recv calls here to add a request packet to the input queue */
void rxe_resp_queue_pkt(struct rxe_qp *qp, struct sk_buff *skb)
{
int must_sched;
struct rxe_pkt_info *pkt = SKB_TO_PKT(skb);
skb_queue_tail(&qp->req_pkts, skb);
must_sched = (pkt->opcode == IB_OPCODE_RC_RDMA_READ_REQUEST) ||
(skb_queue_len(&qp->req_pkts) > 1);
if (must_sched)
rxe_sched_task(&qp->resp.task);
else
rxe_run_task(&qp->resp.task);
}
static inline enum resp_states get_req(struct rxe_qp *qp,
struct rxe_pkt_info **pkt_p)
{
struct sk_buff *skb;
skb = skb_peek(&qp->req_pkts);
if (!skb)
return RESPST_EXIT;
*pkt_p = SKB_TO_PKT(skb);
return (qp->resp.res) ? RESPST_READ_REPLY : RESPST_CHK_PSN;
}
static enum resp_states check_psn(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
int diff = psn_compare(pkt->psn, qp->resp.psn);
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
switch (qp_type(qp)) {
case IB_QPT_RC:
if (diff > 0) {
if (qp->resp.sent_psn_nak)
return RESPST_CLEANUP;
qp->resp.sent_psn_nak = 1;
rxe_counter_inc(rxe, RXE_CNT_OUT_OF_SEQ_REQ);
return RESPST_ERR_PSN_OUT_OF_SEQ;
} else if (diff < 0) {
rxe_counter_inc(rxe, RXE_CNT_DUP_REQ);
return RESPST_DUPLICATE_REQUEST;
}
if (qp->resp.sent_psn_nak)
qp->resp.sent_psn_nak = 0;
break;
case IB_QPT_UC:
if (qp->resp.drop_msg || diff != 0) {
if (pkt->mask & RXE_START_MASK) {
qp->resp.drop_msg = 0;
return RESPST_CHK_OP_SEQ;
}
qp->resp.drop_msg = 1;
return RESPST_CLEANUP;
}
break;
default:
break;
}
return RESPST_CHK_OP_SEQ;
}
static enum resp_states check_op_seq(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
switch (qp_type(qp)) {
case IB_QPT_RC:
switch (qp->resp.opcode) {
case IB_OPCODE_RC_SEND_FIRST:
case IB_OPCODE_RC_SEND_MIDDLE:
switch (pkt->opcode) {
case IB_OPCODE_RC_SEND_MIDDLE:
case IB_OPCODE_RC_SEND_LAST:
case IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE:
case IB_OPCODE_RC_SEND_LAST_WITH_INVALIDATE:
return RESPST_CHK_OP_VALID;
default:
return RESPST_ERR_MISSING_OPCODE_LAST_C;
}
case IB_OPCODE_RC_RDMA_WRITE_FIRST:
case IB_OPCODE_RC_RDMA_WRITE_MIDDLE:
switch (pkt->opcode) {
case IB_OPCODE_RC_RDMA_WRITE_MIDDLE:
case IB_OPCODE_RC_RDMA_WRITE_LAST:
case IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE:
return RESPST_CHK_OP_VALID;
default:
return RESPST_ERR_MISSING_OPCODE_LAST_C;
}
default:
switch (pkt->opcode) {
case IB_OPCODE_RC_SEND_MIDDLE:
case IB_OPCODE_RC_SEND_LAST:
case IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE:
case IB_OPCODE_RC_SEND_LAST_WITH_INVALIDATE:
case IB_OPCODE_RC_RDMA_WRITE_MIDDLE:
case IB_OPCODE_RC_RDMA_WRITE_LAST:
case IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE:
return RESPST_ERR_MISSING_OPCODE_FIRST;
default:
return RESPST_CHK_OP_VALID;
}
}
break;
case IB_QPT_UC:
switch (qp->resp.opcode) {
case IB_OPCODE_UC_SEND_FIRST:
case IB_OPCODE_UC_SEND_MIDDLE:
switch (pkt->opcode) {
case IB_OPCODE_UC_SEND_MIDDLE:
case IB_OPCODE_UC_SEND_LAST:
case IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE:
return RESPST_CHK_OP_VALID;
default:
return RESPST_ERR_MISSING_OPCODE_LAST_D1E;
}
case IB_OPCODE_UC_RDMA_WRITE_FIRST:
case IB_OPCODE_UC_RDMA_WRITE_MIDDLE:
switch (pkt->opcode) {
case IB_OPCODE_UC_RDMA_WRITE_MIDDLE:
case IB_OPCODE_UC_RDMA_WRITE_LAST:
case IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE:
return RESPST_CHK_OP_VALID;
default:
return RESPST_ERR_MISSING_OPCODE_LAST_D1E;
}
default:
switch (pkt->opcode) {
case IB_OPCODE_UC_SEND_MIDDLE:
case IB_OPCODE_UC_SEND_LAST:
case IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE:
case IB_OPCODE_UC_RDMA_WRITE_MIDDLE:
case IB_OPCODE_UC_RDMA_WRITE_LAST:
case IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE:
qp->resp.drop_msg = 1;
return RESPST_CLEANUP;
default:
return RESPST_CHK_OP_VALID;
}
}
break;
default:
return RESPST_CHK_OP_VALID;
}
}
static bool check_qp_attr_access(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
if (((pkt->mask & RXE_READ_MASK) &&
!(qp->attr.qp_access_flags & IB_ACCESS_REMOTE_READ)) ||
((pkt->mask & (RXE_WRITE_MASK | RXE_ATOMIC_WRITE_MASK)) &&
!(qp->attr.qp_access_flags & IB_ACCESS_REMOTE_WRITE)) ||
((pkt->mask & RXE_ATOMIC_MASK) &&
!(qp->attr.qp_access_flags & IB_ACCESS_REMOTE_ATOMIC)))
return false;
if (pkt->mask & RXE_FLUSH_MASK) {
u32 flush_type = feth_plt(pkt);
if ((flush_type & IB_FLUSH_GLOBAL &&
!(qp->attr.qp_access_flags & IB_ACCESS_FLUSH_GLOBAL)) ||
(flush_type & IB_FLUSH_PERSISTENT &&
!(qp->attr.qp_access_flags & IB_ACCESS_FLUSH_PERSISTENT)))
return false;
}
return true;
}
static enum resp_states check_op_valid(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
switch (qp_type(qp)) {
case IB_QPT_RC:
if (!check_qp_attr_access(qp, pkt))
return RESPST_ERR_UNSUPPORTED_OPCODE;
break;
case IB_QPT_UC:
if ((pkt->mask & RXE_WRITE_MASK) &&
!(qp->attr.qp_access_flags & IB_ACCESS_REMOTE_WRITE)) {
qp->resp.drop_msg = 1;
return RESPST_CLEANUP;
}
break;
case IB_QPT_UD:
case IB_QPT_GSI:
break;
default:
WARN_ON_ONCE(1);
break;
}
return RESPST_CHK_RESOURCE;
}
static enum resp_states get_srq_wqe(struct rxe_qp *qp)
{
struct rxe_srq *srq = qp->srq;
struct rxe_queue *q = srq->rq.queue;
struct rxe_recv_wqe *wqe;
struct ib_event ev;
unsigned int count;
size_t size;
unsigned long flags;
if (srq->error)
return RESPST_ERR_RNR;
spin_lock_irqsave(&srq->rq.consumer_lock, flags);
wqe = queue_head(q, QUEUE_TYPE_FROM_CLIENT);
if (!wqe) {
spin_unlock_irqrestore(&srq->rq.consumer_lock, flags);
return RESPST_ERR_RNR;
}
/* don't trust user space data */
if (unlikely(wqe->dma.num_sge > srq->rq.max_sge)) {
spin_unlock_irqrestore(&srq->rq.consumer_lock, flags);
rxe_dbg_qp(qp, "invalid num_sge in SRQ entry\n");
return RESPST_ERR_MALFORMED_WQE;
}
size = sizeof(*wqe) + wqe->dma.num_sge*sizeof(struct rxe_sge);
memcpy(&qp->resp.srq_wqe, wqe, size);
qp->resp.wqe = &qp->resp.srq_wqe.wqe;
queue_advance_consumer(q, QUEUE_TYPE_FROM_CLIENT);
count = queue_count(q, QUEUE_TYPE_FROM_CLIENT);
if (srq->limit && srq->ibsrq.event_handler && (count < srq->limit)) {
srq->limit = 0;
goto event;
}
spin_unlock_irqrestore(&srq->rq.consumer_lock, flags);
return RESPST_CHK_LENGTH;
event:
spin_unlock_irqrestore(&srq->rq.consumer_lock, flags);
ev.device = qp->ibqp.device;
ev.element.srq = qp->ibqp.srq;
ev.event = IB_EVENT_SRQ_LIMIT_REACHED;
srq->ibsrq.event_handler(&ev, srq->ibsrq.srq_context);
return RESPST_CHK_LENGTH;
}
static enum resp_states check_resource(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
struct rxe_srq *srq = qp->srq;
if (pkt->mask & (RXE_READ_OR_ATOMIC_MASK | RXE_ATOMIC_WRITE_MASK)) {
/* it is the requesters job to not send
* too many read/atomic ops, we just
* recycle the responder resource queue
*/
if (likely(qp->attr.max_dest_rd_atomic > 0))
return RESPST_CHK_LENGTH;
else
return RESPST_ERR_TOO_MANY_RDMA_ATM_REQ;
}
if (pkt->mask & RXE_RWR_MASK) {
if (srq)
return get_srq_wqe(qp);
qp->resp.wqe = queue_head(qp->rq.queue,
QUEUE_TYPE_FROM_CLIENT);
return (qp->resp.wqe) ? RESPST_CHK_LENGTH : RESPST_ERR_RNR;
}
return RESPST_CHK_LENGTH;
}
static enum resp_states rxe_resp_check_length(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
/*
* See IBA C9-92
* For UD QPs we only check if the packet will fit in the
* receive buffer later. For rmda operations additional
* length checks are performed in check_rkey.
*/
if (pkt->mask & RXE_PAYLOAD_MASK && ((qp_type(qp) == IB_QPT_RC) ||
(qp_type(qp) == IB_QPT_UC))) {
unsigned int mtu = qp->mtu;
unsigned int payload = payload_size(pkt);
if ((pkt->mask & RXE_START_MASK) &&
(pkt->mask & RXE_END_MASK)) {
if (unlikely(payload > mtu)) {
rxe_dbg_qp(qp, "only packet too long");
return RESPST_ERR_LENGTH;
}
} else if ((pkt->mask & RXE_START_MASK) ||
(pkt->mask & RXE_MIDDLE_MASK)) {
if (unlikely(payload != mtu)) {
rxe_dbg_qp(qp, "first or middle packet not mtu");
return RESPST_ERR_LENGTH;
}
} else if (pkt->mask & RXE_END_MASK) {
if (unlikely((payload == 0) || (payload > mtu))) {
rxe_dbg_qp(qp, "last packet zero or too long");
return RESPST_ERR_LENGTH;
}
}
}
/* See IBA C9-94 */
if (pkt->mask & RXE_RETH_MASK) {
if (reth_len(pkt) > (1U << 31)) {
rxe_dbg_qp(qp, "dma length too long");
return RESPST_ERR_LENGTH;
}
}
if (pkt->mask & RXE_RDMA_OP_MASK)
return RESPST_CHK_RKEY;
else
return RESPST_EXECUTE;
}
/* if the reth length field is zero we can assume nothing
* about the rkey value and should not validate or use it.
* Instead set qp->resp.rkey to 0 which is an invalid rkey
* value since the minimum index part is 1.
*/
static void qp_resp_from_reth(struct rxe_qp *qp, struct rxe_pkt_info *pkt)
{
unsigned int length = reth_len(pkt);
qp->resp.va = reth_va(pkt);
qp->resp.offset = 0;
qp->resp.resid = length;
qp->resp.length = length;
if (pkt->mask & RXE_READ_OR_WRITE_MASK && length == 0)
qp->resp.rkey = 0;
else
qp->resp.rkey = reth_rkey(pkt);
}
static void qp_resp_from_atmeth(struct rxe_qp *qp, struct rxe_pkt_info *pkt)
{
qp->resp.va = atmeth_va(pkt);
qp->resp.offset = 0;
qp->resp.rkey = atmeth_rkey(pkt);
qp->resp.resid = sizeof(u64);
}
/* resolve the packet rkey to qp->resp.mr or set qp->resp.mr to NULL
* if an invalid rkey is received or the rdma length is zero. For middle
* or last packets use the stored value of mr.
*/
static enum resp_states check_rkey(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
struct rxe_mr *mr = NULL;
struct rxe_mw *mw = NULL;
u64 va;
u32 rkey;
u32 resid;
u32 pktlen;
int mtu = qp->mtu;
enum resp_states state;
int access = 0;
/* parse RETH or ATMETH header for first/only packets
* for va, length, rkey, etc. or use current value for
* middle/last packets.
*/
if (pkt->mask & (RXE_READ_OR_WRITE_MASK | RXE_ATOMIC_WRITE_MASK)) {
if (pkt->mask & RXE_RETH_MASK)
qp_resp_from_reth(qp, pkt);
access = (pkt->mask & RXE_READ_MASK) ? IB_ACCESS_REMOTE_READ
: IB_ACCESS_REMOTE_WRITE;
} else if (pkt->mask & RXE_FLUSH_MASK) {
u32 flush_type = feth_plt(pkt);
if (pkt->mask & RXE_RETH_MASK)
qp_resp_from_reth(qp, pkt);
if (flush_type & IB_FLUSH_GLOBAL)
access |= IB_ACCESS_FLUSH_GLOBAL;
if (flush_type & IB_FLUSH_PERSISTENT)
access |= IB_ACCESS_FLUSH_PERSISTENT;
} else if (pkt->mask & RXE_ATOMIC_MASK) {
qp_resp_from_atmeth(qp, pkt);
access = IB_ACCESS_REMOTE_ATOMIC;
} else {
/* shouldn't happen */
WARN_ON(1);
}
/* A zero-byte read or write op is not required to
* set an addr or rkey. See C9-88
*/
if ((pkt->mask & RXE_READ_OR_WRITE_MASK) &&
(pkt->mask & RXE_RETH_MASK) && reth_len(pkt) == 0) {
qp->resp.mr = NULL;
return RESPST_EXECUTE;
}
va = qp->resp.va;
rkey = qp->resp.rkey;
resid = qp->resp.resid;
pktlen = payload_size(pkt);
if (rkey_is_mw(rkey)) {
mw = rxe_lookup_mw(qp, access, rkey);
if (!mw) {
rxe_dbg_qp(qp, "no MW matches rkey %#x\n", rkey);
state = RESPST_ERR_RKEY_VIOLATION;
goto err;
}
mr = mw->mr;
if (!mr) {
rxe_dbg_qp(qp, "MW doesn't have an MR\n");
state = RESPST_ERR_RKEY_VIOLATION;
goto err;
}
if (mw->access & IB_ZERO_BASED)
qp->resp.offset = mw->addr;
rxe_get(mr);
rxe_put(mw);
mw = NULL;
} else {
mr = lookup_mr(qp->pd, access, rkey, RXE_LOOKUP_REMOTE);
if (!mr) {
rxe_dbg_qp(qp, "no MR matches rkey %#x\n", rkey);
state = RESPST_ERR_RKEY_VIOLATION;
goto err;
}
}
if (pkt->mask & RXE_FLUSH_MASK) {
/* FLUSH MR may not set va or resid
* no need to check range since we will flush whole mr
*/
if (feth_sel(pkt) == IB_FLUSH_MR)
goto skip_check_range;
}
if (mr_check_range(mr, va + qp->resp.offset, resid)) {
state = RESPST_ERR_RKEY_VIOLATION;
goto err;
}
skip_check_range:
if (pkt->mask & (RXE_WRITE_MASK | RXE_ATOMIC_WRITE_MASK)) {
if (resid > mtu) {
if (pktlen != mtu || bth_pad(pkt)) {
state = RESPST_ERR_LENGTH;
goto err;
}
} else {
if (pktlen != resid) {
state = RESPST_ERR_LENGTH;
goto err;
}
if ((bth_pad(pkt) != (0x3 & (-resid)))) {
/* This case may not be exactly that
* but nothing else fits.
*/
state = RESPST_ERR_LENGTH;
goto err;
}
}
}
WARN_ON_ONCE(qp->resp.mr);
qp->resp.mr = mr;
return RESPST_EXECUTE;
err:
qp->resp.mr = NULL;
if (mr)
rxe_put(mr);
if (mw)
rxe_put(mw);
return state;
}
static enum resp_states send_data_in(struct rxe_qp *qp, void *data_addr,
int data_len)
{
int err;
err = copy_data(qp->pd, IB_ACCESS_LOCAL_WRITE, &qp->resp.wqe->dma,
data_addr, data_len, RXE_TO_MR_OBJ);
if (unlikely(err))
return (err == -ENOSPC) ? RESPST_ERR_LENGTH
: RESPST_ERR_MALFORMED_WQE;
return RESPST_NONE;
}
static enum resp_states write_data_in(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
enum resp_states rc = RESPST_NONE;
int err;
int data_len = payload_size(pkt);
err = rxe_mr_copy(qp->resp.mr, qp->resp.va + qp->resp.offset,
payload_addr(pkt), data_len, RXE_TO_MR_OBJ);
if (err) {
rc = RESPST_ERR_RKEY_VIOLATION;
goto out;
}
qp->resp.va += data_len;
qp->resp.resid -= data_len;
out:
return rc;
}
static struct resp_res *rxe_prepare_res(struct rxe_qp *qp,
struct rxe_pkt_info *pkt,
int type)
{
struct resp_res *res;
u32 pkts;
res = &qp->resp.resources[qp->resp.res_head];
rxe_advance_resp_resource(qp);
free_rd_atomic_resource(res);
res->type = type;
res->replay = 0;
switch (type) {
case RXE_READ_MASK:
res->read.va = qp->resp.va + qp->resp.offset;
res->read.va_org = qp->resp.va + qp->resp.offset;
res->read.resid = qp->resp.resid;
res->read.length = qp->resp.resid;
res->read.rkey = qp->resp.rkey;
pkts = max_t(u32, (reth_len(pkt) + qp->mtu - 1)/qp->mtu, 1);
res->first_psn = pkt->psn;
res->cur_psn = pkt->psn;
res->last_psn = (pkt->psn + pkts - 1) & BTH_PSN_MASK;
res->state = rdatm_res_state_new;
break;
case RXE_ATOMIC_MASK:
case RXE_ATOMIC_WRITE_MASK:
res->first_psn = pkt->psn;
res->last_psn = pkt->psn;
res->cur_psn = pkt->psn;
break;
case RXE_FLUSH_MASK:
res->flush.va = qp->resp.va + qp->resp.offset;
res->flush.length = qp->resp.length;
res->flush.type = feth_plt(pkt);
res->flush.level = feth_sel(pkt);
}
return res;
}
static enum resp_states process_flush(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
u64 length, start;
struct rxe_mr *mr = qp->resp.mr;
struct resp_res *res = qp->resp.res;
/* oA19-14, oA19-15 */
if (res && res->replay)
return RESPST_ACKNOWLEDGE;
else if (!res) {
res = rxe_prepare_res(qp, pkt, RXE_FLUSH_MASK);
qp->resp.res = res;
}
if (res->flush.level == IB_FLUSH_RANGE) {
start = res->flush.va;
length = res->flush.length;
} else { /* level == IB_FLUSH_MR */
start = mr->ibmr.iova;
length = mr->ibmr.length;
}
if (res->flush.type & IB_FLUSH_PERSISTENT) {
if (rxe_flush_pmem_iova(mr, start, length))
return RESPST_ERR_RKEY_VIOLATION;
/* Make data persistent. */
wmb();
} else if (res->flush.type & IB_FLUSH_GLOBAL) {
/* Make data global visibility. */
wmb();
}
qp->resp.msn++;
/* next expected psn, read handles this separately */
qp->resp.psn = (pkt->psn + 1) & BTH_PSN_MASK;
qp->resp.ack_psn = qp->resp.psn;
qp->resp.opcode = pkt->opcode;
qp->resp.status = IB_WC_SUCCESS;
return RESPST_ACKNOWLEDGE;
}
static enum resp_states atomic_reply(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
struct rxe_mr *mr = qp->resp.mr;
struct resp_res *res = qp->resp.res;
int err;
if (!res) {
res = rxe_prepare_res(qp, pkt, RXE_ATOMIC_MASK);
qp->resp.res = res;
}
if (!res->replay) {
u64 iova = qp->resp.va + qp->resp.offset;
err = rxe_mr_do_atomic_op(mr, iova, pkt->opcode,
atmeth_comp(pkt),
atmeth_swap_add(pkt),
&res->atomic.orig_val);
if (err)
return err;
qp->resp.msn++;
/* next expected psn, read handles this separately */
qp->resp.psn = (pkt->psn + 1) & BTH_PSN_MASK;
qp->resp.ack_psn = qp->resp.psn;
qp->resp.opcode = pkt->opcode;
qp->resp.status = IB_WC_SUCCESS;
}
return RESPST_ACKNOWLEDGE;
}
static enum resp_states atomic_write_reply(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
struct resp_res *res = qp->resp.res;
struct rxe_mr *mr;
u64 value;
u64 iova;
int err;
if (!res) {
res = rxe_prepare_res(qp, pkt, RXE_ATOMIC_WRITE_MASK);
qp->resp.res = res;
}
if (res->replay)
return RESPST_ACKNOWLEDGE;
mr = qp->resp.mr;
value = *(u64 *)payload_addr(pkt);
iova = qp->resp.va + qp->resp.offset;
err = rxe_mr_do_atomic_write(mr, iova, value);
if (err)
return err;
qp->resp.resid = 0;
qp->resp.msn++;
/* next expected psn, read handles this separately */
qp->resp.psn = (pkt->psn + 1) & BTH_PSN_MASK;
qp->resp.ack_psn = qp->resp.psn;
qp->resp.opcode = pkt->opcode;
qp->resp.status = IB_WC_SUCCESS;
return RESPST_ACKNOWLEDGE;
}
static struct sk_buff *prepare_ack_packet(struct rxe_qp *qp,
struct rxe_pkt_info *ack,
int opcode,
int payload,
u32 psn,
u8 syndrome)
{
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
struct sk_buff *skb;
int paylen;
int pad;
int err;
/*
* allocate packet
*/
pad = (-payload) & 0x3;
paylen = rxe_opcode[opcode].length + payload + pad + RXE_ICRC_SIZE;
skb = rxe_init_packet(rxe, &qp->pri_av, paylen, ack);
if (!skb)
return NULL;
ack->qp = qp;
ack->opcode = opcode;
ack->mask = rxe_opcode[opcode].mask;
ack->paylen = paylen;
ack->psn = psn;
bth_init(ack, opcode, 0, 0, pad, IB_DEFAULT_PKEY_FULL,
qp->attr.dest_qp_num, 0, psn);
if (ack->mask & RXE_AETH_MASK) {
aeth_set_syn(ack, syndrome);
aeth_set_msn(ack, qp->resp.msn);
}
if (ack->mask & RXE_ATMACK_MASK)
atmack_set_orig(ack, qp->resp.res->atomic.orig_val);
err = rxe_prepare(&qp->pri_av, ack, skb);
if (err) {
kfree_skb(skb);
return NULL;
}
return skb;
}
/**
* rxe_recheck_mr - revalidate MR from rkey and get a reference
* @qp: the qp
* @rkey: the rkey
*
* This code allows the MR to be invalidated or deregistered or
* the MW if one was used to be invalidated or deallocated.
* It is assumed that the access permissions if originally good
* are OK and the mappings to be unchanged.
*
* TODO: If someone reregisters an MR to change its size or
* access permissions during the processing of an RDMA read
* we should kill the responder resource and complete the
* operation with an error.
*
* Return: mr on success else NULL
*/
static struct rxe_mr *rxe_recheck_mr(struct rxe_qp *qp, u32 rkey)
{
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
struct rxe_mr *mr;
struct rxe_mw *mw;
if (rkey_is_mw(rkey)) {
mw = rxe_pool_get_index(&rxe->mw_pool, rkey >> 8);
if (!mw)
return NULL;
mr = mw->mr;
if (mw->rkey != rkey || mw->state != RXE_MW_STATE_VALID ||
!mr || mr->state != RXE_MR_STATE_VALID) {
rxe_put(mw);
return NULL;
}
rxe_get(mr);
rxe_put(mw);
return mr;
}
mr = rxe_pool_get_index(&rxe->mr_pool, rkey >> 8);
if (!mr)
return NULL;
if (mr->rkey != rkey || mr->state != RXE_MR_STATE_VALID) {
rxe_put(mr);
return NULL;
}
return mr;
}
/* RDMA read response. If res is not NULL, then we have a current RDMA request
* being processed or replayed.
*/
static enum resp_states read_reply(struct rxe_qp *qp,
struct rxe_pkt_info *req_pkt)
{
struct rxe_pkt_info ack_pkt;
struct sk_buff *skb;
int mtu = qp->mtu;
enum resp_states state;
int payload;
int opcode;
int err;
struct resp_res *res = qp->resp.res;
struct rxe_mr *mr;
if (!res) {
res = rxe_prepare_res(qp, req_pkt, RXE_READ_MASK);
qp->resp.res = res;
}
if (res->state == rdatm_res_state_new) {
if (!res->replay || qp->resp.length == 0) {
/* if length == 0 mr will be NULL (is ok)
* otherwise qp->resp.mr holds a ref on mr
* which we transfer to mr and drop below.
*/
mr = qp->resp.mr;
qp->resp.mr = NULL;
} else {
mr = rxe_recheck_mr(qp, res->read.rkey);
if (!mr)
return RESPST_ERR_RKEY_VIOLATION;
}
if (res->read.resid <= mtu)
opcode = IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY;
else
opcode = IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST;
} else {
/* re-lookup mr from rkey on all later packets.
* length will be non-zero. This can fail if someone
* modifies or destroys the mr since the first packet.
*/
mr = rxe_recheck_mr(qp, res->read.rkey);
if (!mr)
return RESPST_ERR_RKEY_VIOLATION;
if (res->read.resid > mtu)
opcode = IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE;
else
opcode = IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST;
}
res->state = rdatm_res_state_next;
payload = min_t(int, res->read.resid, mtu);
skb = prepare_ack_packet(qp, &ack_pkt, opcode, payload,
res->cur_psn, AETH_ACK_UNLIMITED);
if (!skb) {
state = RESPST_ERR_RNR;
goto err_out;
}
err = rxe_mr_copy(mr, res->read.va, payload_addr(&ack_pkt),
payload, RXE_FROM_MR_OBJ);
if (err) {
kfree_skb(skb);
state = RESPST_ERR_RKEY_VIOLATION;
goto err_out;
}
if (bth_pad(&ack_pkt)) {
u8 *pad = payload_addr(&ack_pkt) + payload;
memset(pad, 0, bth_pad(&ack_pkt));
}
/* rxe_xmit_packet always consumes the skb */
err = rxe_xmit_packet(qp, &ack_pkt, skb);
if (err) {
state = RESPST_ERR_RNR;
goto err_out;
}
res->read.va += payload;
res->read.resid -= payload;
res->cur_psn = (res->cur_psn + 1) & BTH_PSN_MASK;
if (res->read.resid > 0) {
state = RESPST_DONE;
} else {
qp->resp.res = NULL;
if (!res->replay)
qp->resp.opcode = -1;
if (psn_compare(res->cur_psn, qp->resp.psn) >= 0)
qp->resp.psn = res->cur_psn;
state = RESPST_CLEANUP;
}
err_out:
if (mr)
rxe_put(mr);
return state;
}
static int invalidate_rkey(struct rxe_qp *qp, u32 rkey)
{
if (rkey_is_mw(rkey))
return rxe_invalidate_mw(qp, rkey);
else
return rxe_invalidate_mr(qp, rkey);
}
/* Executes a new request. A retried request never reach that function (send
* and writes are discarded, and reads and atomics are retried elsewhere.
*/
static enum resp_states execute(struct rxe_qp *qp, struct rxe_pkt_info *pkt)
{
enum resp_states err;
struct sk_buff *skb = PKT_TO_SKB(pkt);
union rdma_network_hdr hdr;
if (pkt->mask & RXE_SEND_MASK) {
if (qp_type(qp) == IB_QPT_UD ||
qp_type(qp) == IB_QPT_GSI) {
if (skb->protocol == htons(ETH_P_IP)) {
memset(&hdr.reserved, 0,
sizeof(hdr.reserved));
memcpy(&hdr.roce4grh, ip_hdr(skb),
sizeof(hdr.roce4grh));
err = send_data_in(qp, &hdr, sizeof(hdr));
} else {
err = send_data_in(qp, ipv6_hdr(skb),
sizeof(hdr));
}
if (err)
return err;
}
err = send_data_in(qp, payload_addr(pkt), payload_size(pkt));
if (err)
return err;
} else if (pkt->mask & RXE_WRITE_MASK) {
err = write_data_in(qp, pkt);
if (err)
return err;
} else if (pkt->mask & RXE_READ_MASK) {
/* For RDMA Read we can increment the msn now. See C9-148. */
qp->resp.msn++;
return RESPST_READ_REPLY;
} else if (pkt->mask & RXE_ATOMIC_MASK) {
return RESPST_ATOMIC_REPLY;
} else if (pkt->mask & RXE_ATOMIC_WRITE_MASK) {
return RESPST_ATOMIC_WRITE_REPLY;
} else if (pkt->mask & RXE_FLUSH_MASK) {
return RESPST_PROCESS_FLUSH;
} else {
/* Unreachable */
WARN_ON_ONCE(1);
}
if (pkt->mask & RXE_IETH_MASK) {
u32 rkey = ieth_rkey(pkt);
err = invalidate_rkey(qp, rkey);
if (err)
return RESPST_ERR_INVALIDATE_RKEY;
}
if (pkt->mask & RXE_END_MASK)
/* We successfully processed this new request. */
qp->resp.msn++;
/* next expected psn, read handles this separately */
qp->resp.psn = (pkt->psn + 1) & BTH_PSN_MASK;
qp->resp.ack_psn = qp->resp.psn;
qp->resp.opcode = pkt->opcode;
qp->resp.status = IB_WC_SUCCESS;
if (pkt->mask & RXE_COMP_MASK)
return RESPST_COMPLETE;
else if (qp_type(qp) == IB_QPT_RC)
return RESPST_ACKNOWLEDGE;
else
return RESPST_CLEANUP;
}
static enum resp_states do_complete(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
struct rxe_cqe cqe;
struct ib_wc *wc = &cqe.ibwc;
struct ib_uverbs_wc *uwc = &cqe.uibwc;
struct rxe_recv_wqe *wqe = qp->resp.wqe;
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
unsigned long flags;
if (!wqe)
goto finish;
memset(&cqe, 0, sizeof(cqe));
if (qp->rcq->is_user) {
uwc->status = qp->resp.status;
uwc->qp_num = qp->ibqp.qp_num;
uwc->wr_id = wqe->wr_id;
} else {
wc->status = qp->resp.status;
wc->qp = &qp->ibqp;
wc->wr_id = wqe->wr_id;
}
if (wc->status == IB_WC_SUCCESS) {
rxe_counter_inc(rxe, RXE_CNT_RDMA_RECV);
wc->opcode = (pkt->mask & RXE_IMMDT_MASK &&
pkt->mask & RXE_WRITE_MASK) ?
IB_WC_RECV_RDMA_WITH_IMM : IB_WC_RECV;
wc->byte_len = (pkt->mask & RXE_IMMDT_MASK &&
pkt->mask & RXE_WRITE_MASK) ?
qp->resp.length : wqe->dma.length - wqe->dma.resid;
/* fields after byte_len are different between kernel and user
* space
*/
if (qp->rcq->is_user) {
uwc->wc_flags = IB_WC_GRH;
if (pkt->mask & RXE_IMMDT_MASK) {
uwc->wc_flags |= IB_WC_WITH_IMM;
uwc->ex.imm_data = immdt_imm(pkt);
}
if (pkt->mask & RXE_IETH_MASK) {
uwc->wc_flags |= IB_WC_WITH_INVALIDATE;
uwc->ex.invalidate_rkey = ieth_rkey(pkt);
}
if (pkt->mask & RXE_DETH_MASK)
uwc->src_qp = deth_sqp(pkt);
uwc->port_num = qp->attr.port_num;
} else {
struct sk_buff *skb = PKT_TO_SKB(pkt);
wc->wc_flags = IB_WC_GRH | IB_WC_WITH_NETWORK_HDR_TYPE;
if (skb->protocol == htons(ETH_P_IP))
wc->network_hdr_type = RDMA_NETWORK_IPV4;
else
wc->network_hdr_type = RDMA_NETWORK_IPV6;
if (is_vlan_dev(skb->dev)) {
wc->wc_flags |= IB_WC_WITH_VLAN;
wc->vlan_id = vlan_dev_vlan_id(skb->dev);
}
if (pkt->mask & RXE_IMMDT_MASK) {
wc->wc_flags |= IB_WC_WITH_IMM;
wc->ex.imm_data = immdt_imm(pkt);
}
if (pkt->mask & RXE_IETH_MASK) {
wc->wc_flags |= IB_WC_WITH_INVALIDATE;
wc->ex.invalidate_rkey = ieth_rkey(pkt);
}
if (pkt->mask & RXE_DETH_MASK)
wc->src_qp = deth_sqp(pkt);
wc->port_num = qp->attr.port_num;
}
} else {
if (wc->status != IB_WC_WR_FLUSH_ERR)
rxe_err_qp(qp, "non-flush error status = %d",
wc->status);
}
/* have copy for srq and reference for !srq */
if (!qp->srq)
queue_advance_consumer(qp->rq.queue, QUEUE_TYPE_FROM_CLIENT);
qp->resp.wqe = NULL;
if (rxe_cq_post(qp->rcq, &cqe, pkt ? bth_se(pkt) : 1))
return RESPST_ERR_CQ_OVERFLOW;
finish:
spin_lock_irqsave(&qp->state_lock, flags);
if (unlikely(qp_state(qp) == IB_QPS_ERR)) {
spin_unlock_irqrestore(&qp->state_lock, flags);
return RESPST_CHK_RESOURCE;
}
spin_unlock_irqrestore(&qp->state_lock, flags);
if (unlikely(!pkt))
return RESPST_DONE;
if (qp_type(qp) == IB_QPT_RC)
return RESPST_ACKNOWLEDGE;
else
return RESPST_CLEANUP;
}
static int send_common_ack(struct rxe_qp *qp, u8 syndrome, u32 psn,
int opcode, const char *msg)
{
int err;
struct rxe_pkt_info ack_pkt;
struct sk_buff *skb;
skb = prepare_ack_packet(qp, &ack_pkt, opcode, 0, psn, syndrome);
if (!skb)
return -ENOMEM;
err = rxe_xmit_packet(qp, &ack_pkt, skb);
if (err)
rxe_dbg_qp(qp, "Failed sending %s\n", msg);
return err;
}
static int send_ack(struct rxe_qp *qp, u8 syndrome, u32 psn)
{
return send_common_ack(qp, syndrome, psn,
IB_OPCODE_RC_ACKNOWLEDGE, "ACK");
}
static int send_atomic_ack(struct rxe_qp *qp, u8 syndrome, u32 psn)
{
int ret = send_common_ack(qp, syndrome, psn,
IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE, "ATOMIC ACK");
/* have to clear this since it is used to trigger
* long read replies
*/
qp->resp.res = NULL;
return ret;
}
static int send_read_response_ack(struct rxe_qp *qp, u8 syndrome, u32 psn)
{
int ret = send_common_ack(qp, syndrome, psn,
IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY,
"RDMA READ response of length zero ACK");
/* have to clear this since it is used to trigger
* long read replies
*/
qp->resp.res = NULL;
return ret;
}
static enum resp_states acknowledge(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
if (qp_type(qp) != IB_QPT_RC)
return RESPST_CLEANUP;
if (qp->resp.aeth_syndrome != AETH_ACK_UNLIMITED)
send_ack(qp, qp->resp.aeth_syndrome, pkt->psn);
else if (pkt->mask & RXE_ATOMIC_MASK)
send_atomic_ack(qp, AETH_ACK_UNLIMITED, pkt->psn);
else if (pkt->mask & (RXE_FLUSH_MASK | RXE_ATOMIC_WRITE_MASK))
send_read_response_ack(qp, AETH_ACK_UNLIMITED, pkt->psn);
else if (bth_ack(pkt))
send_ack(qp, AETH_ACK_UNLIMITED, pkt->psn);
return RESPST_CLEANUP;
}
static enum resp_states cleanup(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
struct sk_buff *skb;
if (pkt) {
skb = skb_dequeue(&qp->req_pkts);
rxe_put(qp);
kfree_skb(skb);
ib_device_put(qp->ibqp.device);
}
if (qp->resp.mr) {
rxe_put(qp->resp.mr);
qp->resp.mr = NULL;
}
return RESPST_DONE;
}
static struct resp_res *find_resource(struct rxe_qp *qp, u32 psn)
{
int i;
for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
struct resp_res *res = &qp->resp.resources[i];
if (res->type == 0)
continue;
if (psn_compare(psn, res->first_psn) >= 0 &&
psn_compare(psn, res->last_psn) <= 0) {
return res;
}
}
return NULL;
}
static enum resp_states duplicate_request(struct rxe_qp *qp,
struct rxe_pkt_info *pkt)
{
enum resp_states rc;
u32 prev_psn = (qp->resp.ack_psn - 1) & BTH_PSN_MASK;
if (pkt->mask & RXE_SEND_MASK ||
pkt->mask & RXE_WRITE_MASK) {
/* SEND. Ack again and cleanup. C9-105. */
send_ack(qp, AETH_ACK_UNLIMITED, prev_psn);
return RESPST_CLEANUP;
} else if (pkt->mask & RXE_FLUSH_MASK) {
struct resp_res *res;
/* Find the operation in our list of responder resources. */
res = find_resource(qp, pkt->psn);
if (res) {
res->replay = 1;
res->cur_psn = pkt->psn;
qp->resp.res = res;
rc = RESPST_PROCESS_FLUSH;
goto out;
}
/* Resource not found. Class D error. Drop the request. */
rc = RESPST_CLEANUP;
goto out;
} else if (pkt->mask & RXE_READ_MASK) {
struct resp_res *res;
res = find_resource(qp, pkt->psn);
if (!res) {
/* Resource not found. Class D error. Drop the
* request.
*/
rc = RESPST_CLEANUP;
goto out;
} else {
/* Ensure this new request is the same as the previous
* one or a subset of it.
*/
u64 iova = reth_va(pkt);
u32 resid = reth_len(pkt);
if (iova < res->read.va_org ||
resid > res->read.length ||
(iova + resid) > (res->read.va_org +
res->read.length)) {
rc = RESPST_CLEANUP;
goto out;
}
if (reth_rkey(pkt) != res->read.rkey) {
rc = RESPST_CLEANUP;
goto out;
}
res->cur_psn = pkt->psn;
res->state = (pkt->psn == res->first_psn) ?
rdatm_res_state_new :
rdatm_res_state_replay;
res->replay = 1;
/* Reset the resource, except length. */
res->read.va_org = iova;
res->read.va = iova;
res->read.resid = resid;
/* Replay the RDMA read reply. */
qp->resp.res = res;
rc = RESPST_READ_REPLY;
goto out;
}
} else {
struct resp_res *res;
/* Find the operation in our list of responder resources. */
res = find_resource(qp, pkt->psn);
if (res) {
res->replay = 1;
res->cur_psn = pkt->psn;
qp->resp.res = res;
rc = pkt->mask & RXE_ATOMIC_MASK ?
RESPST_ATOMIC_REPLY :
RESPST_ATOMIC_WRITE_REPLY;
goto out;
}
/* Resource not found. Class D error. Drop the request. */
rc = RESPST_CLEANUP;
goto out;
}
out:
return rc;
}
/* Process a class A or C. Both are treated the same in this implementation. */
static void do_class_ac_error(struct rxe_qp *qp, u8 syndrome,
enum ib_wc_status status)
{
qp->resp.aeth_syndrome = syndrome;
qp->resp.status = status;
/* indicate that we should go through the ERROR state */
qp->resp.goto_error = 1;
}
static enum resp_states do_class_d1e_error(struct rxe_qp *qp)
{
/* UC */
if (qp->srq) {
/* Class E */
qp->resp.drop_msg = 1;
if (qp->resp.wqe) {
qp->resp.status = IB_WC_REM_INV_REQ_ERR;
return RESPST_COMPLETE;
} else {
return RESPST_CLEANUP;
}
} else {
/* Class D1. This packet may be the start of a
* new message and could be valid. The previous
* message is invalid and ignored. reset the
* recv wr to its original state
*/
if (qp->resp.wqe) {
qp->resp.wqe->dma.resid = qp->resp.wqe->dma.length;
qp->resp.wqe->dma.cur_sge = 0;
qp->resp.wqe->dma.sge_offset = 0;
qp->resp.opcode = -1;
}
if (qp->resp.mr) {
rxe_put(qp->resp.mr);
qp->resp.mr = NULL;
}
return RESPST_CLEANUP;
}
}
/* drain incoming request packet queue */
static void drain_req_pkts(struct rxe_qp *qp)
{
struct sk_buff *skb;
while ((skb = skb_dequeue(&qp->req_pkts))) {
rxe_put(qp);
kfree_skb(skb);
ib_device_put(qp->ibqp.device);
}
}
/* complete receive wqe with flush error */
static int flush_recv_wqe(struct rxe_qp *qp, struct rxe_recv_wqe *wqe)
{
struct rxe_cqe cqe = {};
struct ib_wc *wc = &cqe.ibwc;
struct ib_uverbs_wc *uwc = &cqe.uibwc;
int err;
if (qp->rcq->is_user) {
uwc->wr_id = wqe->wr_id;
uwc->status = IB_WC_WR_FLUSH_ERR;
uwc->qp_num = qp_num(qp);
} else {
wc->wr_id = wqe->wr_id;
wc->status = IB_WC_WR_FLUSH_ERR;
wc->qp = &qp->ibqp;
}
err = rxe_cq_post(qp->rcq, &cqe, 0);
if (err)
rxe_dbg_cq(qp->rcq, "post cq failed err = %d", err);
return err;
}
/* drain and optionally complete the recive queue
* if unable to complete a wqe stop completing and
* just flush the remaining wqes
*/
static void flush_recv_queue(struct rxe_qp *qp, bool notify)
{
struct rxe_queue *q = qp->rq.queue;
struct rxe_recv_wqe *wqe;
int err;
if (qp->srq) {
if (notify && qp->ibqp.event_handler) {
struct ib_event ev;
ev.device = qp->ibqp.device;
ev.element.qp = &qp->ibqp;
ev.event = IB_EVENT_QP_LAST_WQE_REACHED;
qp->ibqp.event_handler(&ev, qp->ibqp.qp_context);
}
return;
}
/* recv queue not created. nothing to do. */
if (!qp->rq.queue)
return;
while ((wqe = queue_head(q, q->type))) {
if (notify) {
err = flush_recv_wqe(qp, wqe);
if (err)
notify = 0;
}
queue_advance_consumer(q, q->type);
}
qp->resp.wqe = NULL;
}
int rxe_responder(struct rxe_qp *qp)
{
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
enum resp_states state;
struct rxe_pkt_info *pkt = NULL;
int ret;
unsigned long flags;
spin_lock_irqsave(&qp->state_lock, flags);
if (!qp->valid || qp_state(qp) == IB_QPS_ERR ||
qp_state(qp) == IB_QPS_RESET) {
bool notify = qp->valid && (qp_state(qp) == IB_QPS_ERR);
drain_req_pkts(qp);
flush_recv_queue(qp, notify);
spin_unlock_irqrestore(&qp->state_lock, flags);
goto exit;
}
spin_unlock_irqrestore(&qp->state_lock, flags);
qp->resp.aeth_syndrome = AETH_ACK_UNLIMITED;
state = RESPST_GET_REQ;
while (1) {
rxe_dbg_qp(qp, "state = %s\n", resp_state_name[state]);
switch (state) {
case RESPST_GET_REQ:
state = get_req(qp, &pkt);
break;
case RESPST_CHK_PSN:
state = check_psn(qp, pkt);
break;
case RESPST_CHK_OP_SEQ:
state = check_op_seq(qp, pkt);
break;
case RESPST_CHK_OP_VALID:
state = check_op_valid(qp, pkt);
break;
case RESPST_CHK_RESOURCE:
state = check_resource(qp, pkt);
break;
case RESPST_CHK_LENGTH:
state = rxe_resp_check_length(qp, pkt);
break;
case RESPST_CHK_RKEY:
state = check_rkey(qp, pkt);
break;
case RESPST_EXECUTE:
state = execute(qp, pkt);
break;
case RESPST_COMPLETE:
state = do_complete(qp, pkt);
break;
case RESPST_READ_REPLY:
state = read_reply(qp, pkt);
break;
case RESPST_ATOMIC_REPLY:
state = atomic_reply(qp, pkt);
break;
case RESPST_ATOMIC_WRITE_REPLY:
state = atomic_write_reply(qp, pkt);
break;
case RESPST_PROCESS_FLUSH:
state = process_flush(qp, pkt);
break;
case RESPST_ACKNOWLEDGE:
state = acknowledge(qp, pkt);
break;
case RESPST_CLEANUP:
state = cleanup(qp, pkt);
break;
case RESPST_DUPLICATE_REQUEST:
state = duplicate_request(qp, pkt);
break;
case RESPST_ERR_PSN_OUT_OF_SEQ:
/* RC only - Class B. Drop packet. */
send_ack(qp, AETH_NAK_PSN_SEQ_ERROR, qp->resp.psn);
state = RESPST_CLEANUP;
break;
case RESPST_ERR_TOO_MANY_RDMA_ATM_REQ:
case RESPST_ERR_MISSING_OPCODE_FIRST:
case RESPST_ERR_MISSING_OPCODE_LAST_C:
case RESPST_ERR_UNSUPPORTED_OPCODE:
case RESPST_ERR_MISALIGNED_ATOMIC:
/* RC Only - Class C. */
do_class_ac_error(qp, AETH_NAK_INVALID_REQ,
IB_WC_REM_INV_REQ_ERR);
state = RESPST_COMPLETE;
break;
case RESPST_ERR_MISSING_OPCODE_LAST_D1E:
state = do_class_d1e_error(qp);
break;
case RESPST_ERR_RNR:
if (qp_type(qp) == IB_QPT_RC) {
rxe_counter_inc(rxe, RXE_CNT_SND_RNR);
/* RC - class B */
send_ack(qp, AETH_RNR_NAK |
(~AETH_TYPE_MASK &
qp->attr.min_rnr_timer),
pkt->psn);
} else {
/* UD/UC - class D */
qp->resp.drop_msg = 1;
}
state = RESPST_CLEANUP;
break;
case RESPST_ERR_RKEY_VIOLATION:
if (qp_type(qp) == IB_QPT_RC) {
/* Class C */
do_class_ac_error(qp, AETH_NAK_REM_ACC_ERR,
IB_WC_REM_ACCESS_ERR);
state = RESPST_COMPLETE;
} else {
qp->resp.drop_msg = 1;
if (qp->srq) {
/* UC/SRQ Class D */
qp->resp.status = IB_WC_REM_ACCESS_ERR;
state = RESPST_COMPLETE;
} else {
/* UC/non-SRQ Class E. */
state = RESPST_CLEANUP;
}
}
break;
case RESPST_ERR_INVALIDATE_RKEY:
/* RC - Class J. */
qp->resp.goto_error = 1;
qp->resp.status = IB_WC_REM_INV_REQ_ERR;
state = RESPST_COMPLETE;
break;
case RESPST_ERR_LENGTH:
if (qp_type(qp) == IB_QPT_RC) {
/* Class C */
do_class_ac_error(qp, AETH_NAK_INVALID_REQ,
IB_WC_REM_INV_REQ_ERR);
state = RESPST_COMPLETE;
} else if (qp->srq) {
/* UC/UD - class E */
qp->resp.status = IB_WC_REM_INV_REQ_ERR;
state = RESPST_COMPLETE;
} else {
/* UC/UD - class D */
qp->resp.drop_msg = 1;
state = RESPST_CLEANUP;
}
break;
case RESPST_ERR_MALFORMED_WQE:
/* All, Class A. */
do_class_ac_error(qp, AETH_NAK_REM_OP_ERR,
IB_WC_LOC_QP_OP_ERR);
state = RESPST_COMPLETE;
break;
case RESPST_ERR_CQ_OVERFLOW:
/* All - Class G */
state = RESPST_ERROR;
break;
case RESPST_DONE:
if (qp->resp.goto_error) {
state = RESPST_ERROR;
break;
}
goto done;
case RESPST_EXIT:
if (qp->resp.goto_error) {
state = RESPST_ERROR;
break;
}
goto exit;
case RESPST_ERROR:
qp->resp.goto_error = 0;
rxe_dbg_qp(qp, "moved to error state\n");
rxe_qp_error(qp);
goto exit;
default:
WARN_ON_ONCE(1);
}
}
/* A non-zero return value will cause rxe_do_task to
* exit its loop and end the work item. A zero return
* will continue looping and return to rxe_responder
*/
done:
ret = 0;
goto out;
exit:
ret = -EAGAIN;
out:
return ret;
}
| linux-master | drivers/infiniband/sw/rxe/rxe_resp.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include <linux/skbuff.h>
#include <crypto/hash.h>
#include "rxe.h"
#include "rxe_loc.h"
#include "rxe_queue.h"
static int next_opcode(struct rxe_qp *qp, struct rxe_send_wqe *wqe,
u32 opcode);
static inline void retry_first_write_send(struct rxe_qp *qp,
struct rxe_send_wqe *wqe, int npsn)
{
int i;
for (i = 0; i < npsn; i++) {
int to_send = (wqe->dma.resid > qp->mtu) ?
qp->mtu : wqe->dma.resid;
qp->req.opcode = next_opcode(qp, wqe,
wqe->wr.opcode);
if (wqe->wr.send_flags & IB_SEND_INLINE) {
wqe->dma.resid -= to_send;
wqe->dma.sge_offset += to_send;
} else {
advance_dma_data(&wqe->dma, to_send);
}
}
}
static void req_retry(struct rxe_qp *qp)
{
struct rxe_send_wqe *wqe;
unsigned int wqe_index;
unsigned int mask;
int npsn;
int first = 1;
struct rxe_queue *q = qp->sq.queue;
unsigned int cons;
unsigned int prod;
cons = queue_get_consumer(q, QUEUE_TYPE_FROM_CLIENT);
prod = queue_get_producer(q, QUEUE_TYPE_FROM_CLIENT);
qp->req.wqe_index = cons;
qp->req.psn = qp->comp.psn;
qp->req.opcode = -1;
for (wqe_index = cons; wqe_index != prod;
wqe_index = queue_next_index(q, wqe_index)) {
wqe = queue_addr_from_index(qp->sq.queue, wqe_index);
mask = wr_opcode_mask(wqe->wr.opcode, qp);
if (wqe->state == wqe_state_posted)
break;
if (wqe->state == wqe_state_done)
continue;
wqe->iova = (mask & WR_ATOMIC_MASK) ?
wqe->wr.wr.atomic.remote_addr :
(mask & WR_READ_OR_WRITE_MASK) ?
wqe->wr.wr.rdma.remote_addr :
0;
if (!first || (mask & WR_READ_MASK) == 0) {
wqe->dma.resid = wqe->dma.length;
wqe->dma.cur_sge = 0;
wqe->dma.sge_offset = 0;
}
if (first) {
first = 0;
if (mask & WR_WRITE_OR_SEND_MASK) {
npsn = (qp->comp.psn - wqe->first_psn) &
BTH_PSN_MASK;
retry_first_write_send(qp, wqe, npsn);
}
if (mask & WR_READ_MASK) {
npsn = (wqe->dma.length - wqe->dma.resid) /
qp->mtu;
wqe->iova += npsn * qp->mtu;
}
}
wqe->state = wqe_state_posted;
}
}
void rnr_nak_timer(struct timer_list *t)
{
struct rxe_qp *qp = from_timer(qp, t, rnr_nak_timer);
unsigned long flags;
rxe_dbg_qp(qp, "nak timer fired\n");
spin_lock_irqsave(&qp->state_lock, flags);
if (qp->valid) {
/* request a send queue retry */
qp->req.need_retry = 1;
qp->req.wait_for_rnr_timer = 0;
rxe_sched_task(&qp->req.task);
}
spin_unlock_irqrestore(&qp->state_lock, flags);
}
static void req_check_sq_drain_done(struct rxe_qp *qp)
{
struct rxe_queue *q;
unsigned int index;
unsigned int cons;
struct rxe_send_wqe *wqe;
unsigned long flags;
spin_lock_irqsave(&qp->state_lock, flags);
if (qp_state(qp) == IB_QPS_SQD) {
q = qp->sq.queue;
index = qp->req.wqe_index;
cons = queue_get_consumer(q, QUEUE_TYPE_FROM_CLIENT);
wqe = queue_addr_from_index(q, cons);
/* check to see if we are drained;
* state_lock used by requester and completer
*/
do {
if (!qp->attr.sq_draining)
/* comp just finished */
break;
if (wqe && ((index != cons) ||
(wqe->state != wqe_state_posted)))
/* comp not done yet */
break;
qp->attr.sq_draining = 0;
spin_unlock_irqrestore(&qp->state_lock, flags);
if (qp->ibqp.event_handler) {
struct ib_event ev;
ev.device = qp->ibqp.device;
ev.element.qp = &qp->ibqp;
ev.event = IB_EVENT_SQ_DRAINED;
qp->ibqp.event_handler(&ev,
qp->ibqp.qp_context);
}
return;
} while (0);
}
spin_unlock_irqrestore(&qp->state_lock, flags);
}
static struct rxe_send_wqe *__req_next_wqe(struct rxe_qp *qp)
{
struct rxe_queue *q = qp->sq.queue;
unsigned int index = qp->req.wqe_index;
unsigned int prod;
prod = queue_get_producer(q, QUEUE_TYPE_FROM_CLIENT);
if (index == prod)
return NULL;
else
return queue_addr_from_index(q, index);
}
static struct rxe_send_wqe *req_next_wqe(struct rxe_qp *qp)
{
struct rxe_send_wqe *wqe;
unsigned long flags;
req_check_sq_drain_done(qp);
wqe = __req_next_wqe(qp);
if (wqe == NULL)
return NULL;
spin_lock_irqsave(&qp->state_lock, flags);
if (unlikely((qp_state(qp) == IB_QPS_SQD) &&
(wqe->state != wqe_state_processing))) {
spin_unlock_irqrestore(&qp->state_lock, flags);
return NULL;
}
spin_unlock_irqrestore(&qp->state_lock, flags);
wqe->mask = wr_opcode_mask(wqe->wr.opcode, qp);
return wqe;
}
/**
* rxe_wqe_is_fenced - check if next wqe is fenced
* @qp: the queue pair
* @wqe: the next wqe
*
* Returns: 1 if wqe needs to wait
* 0 if wqe is ready to go
*/
static int rxe_wqe_is_fenced(struct rxe_qp *qp, struct rxe_send_wqe *wqe)
{
/* Local invalidate fence (LIF) see IBA 10.6.5.1
* Requires ALL previous operations on the send queue
* are complete. Make mandatory for the rxe driver.
*/
if (wqe->wr.opcode == IB_WR_LOCAL_INV)
return qp->req.wqe_index != queue_get_consumer(qp->sq.queue,
QUEUE_TYPE_FROM_CLIENT);
/* Fence see IBA 10.8.3.3
* Requires that all previous read and atomic operations
* are complete.
*/
return (wqe->wr.send_flags & IB_SEND_FENCE) &&
atomic_read(&qp->req.rd_atomic) != qp->attr.max_rd_atomic;
}
static int next_opcode_rc(struct rxe_qp *qp, u32 opcode, int fits)
{
switch (opcode) {
case IB_WR_RDMA_WRITE:
if (qp->req.opcode == IB_OPCODE_RC_RDMA_WRITE_FIRST ||
qp->req.opcode == IB_OPCODE_RC_RDMA_WRITE_MIDDLE)
return fits ?
IB_OPCODE_RC_RDMA_WRITE_LAST :
IB_OPCODE_RC_RDMA_WRITE_MIDDLE;
else
return fits ?
IB_OPCODE_RC_RDMA_WRITE_ONLY :
IB_OPCODE_RC_RDMA_WRITE_FIRST;
case IB_WR_RDMA_WRITE_WITH_IMM:
if (qp->req.opcode == IB_OPCODE_RC_RDMA_WRITE_FIRST ||
qp->req.opcode == IB_OPCODE_RC_RDMA_WRITE_MIDDLE)
return fits ?
IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE :
IB_OPCODE_RC_RDMA_WRITE_MIDDLE;
else
return fits ?
IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE :
IB_OPCODE_RC_RDMA_WRITE_FIRST;
case IB_WR_SEND:
if (qp->req.opcode == IB_OPCODE_RC_SEND_FIRST ||
qp->req.opcode == IB_OPCODE_RC_SEND_MIDDLE)
return fits ?
IB_OPCODE_RC_SEND_LAST :
IB_OPCODE_RC_SEND_MIDDLE;
else
return fits ?
IB_OPCODE_RC_SEND_ONLY :
IB_OPCODE_RC_SEND_FIRST;
case IB_WR_SEND_WITH_IMM:
if (qp->req.opcode == IB_OPCODE_RC_SEND_FIRST ||
qp->req.opcode == IB_OPCODE_RC_SEND_MIDDLE)
return fits ?
IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE :
IB_OPCODE_RC_SEND_MIDDLE;
else
return fits ?
IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE :
IB_OPCODE_RC_SEND_FIRST;
case IB_WR_FLUSH:
return IB_OPCODE_RC_FLUSH;
case IB_WR_RDMA_READ:
return IB_OPCODE_RC_RDMA_READ_REQUEST;
case IB_WR_ATOMIC_CMP_AND_SWP:
return IB_OPCODE_RC_COMPARE_SWAP;
case IB_WR_ATOMIC_FETCH_AND_ADD:
return IB_OPCODE_RC_FETCH_ADD;
case IB_WR_SEND_WITH_INV:
if (qp->req.opcode == IB_OPCODE_RC_SEND_FIRST ||
qp->req.opcode == IB_OPCODE_RC_SEND_MIDDLE)
return fits ? IB_OPCODE_RC_SEND_LAST_WITH_INVALIDATE :
IB_OPCODE_RC_SEND_MIDDLE;
else
return fits ? IB_OPCODE_RC_SEND_ONLY_WITH_INVALIDATE :
IB_OPCODE_RC_SEND_FIRST;
case IB_WR_ATOMIC_WRITE:
return IB_OPCODE_RC_ATOMIC_WRITE;
case IB_WR_REG_MR:
case IB_WR_LOCAL_INV:
return opcode;
}
return -EINVAL;
}
static int next_opcode_uc(struct rxe_qp *qp, u32 opcode, int fits)
{
switch (opcode) {
case IB_WR_RDMA_WRITE:
if (qp->req.opcode == IB_OPCODE_UC_RDMA_WRITE_FIRST ||
qp->req.opcode == IB_OPCODE_UC_RDMA_WRITE_MIDDLE)
return fits ?
IB_OPCODE_UC_RDMA_WRITE_LAST :
IB_OPCODE_UC_RDMA_WRITE_MIDDLE;
else
return fits ?
IB_OPCODE_UC_RDMA_WRITE_ONLY :
IB_OPCODE_UC_RDMA_WRITE_FIRST;
case IB_WR_RDMA_WRITE_WITH_IMM:
if (qp->req.opcode == IB_OPCODE_UC_RDMA_WRITE_FIRST ||
qp->req.opcode == IB_OPCODE_UC_RDMA_WRITE_MIDDLE)
return fits ?
IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE :
IB_OPCODE_UC_RDMA_WRITE_MIDDLE;
else
return fits ?
IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE :
IB_OPCODE_UC_RDMA_WRITE_FIRST;
case IB_WR_SEND:
if (qp->req.opcode == IB_OPCODE_UC_SEND_FIRST ||
qp->req.opcode == IB_OPCODE_UC_SEND_MIDDLE)
return fits ?
IB_OPCODE_UC_SEND_LAST :
IB_OPCODE_UC_SEND_MIDDLE;
else
return fits ?
IB_OPCODE_UC_SEND_ONLY :
IB_OPCODE_UC_SEND_FIRST;
case IB_WR_SEND_WITH_IMM:
if (qp->req.opcode == IB_OPCODE_UC_SEND_FIRST ||
qp->req.opcode == IB_OPCODE_UC_SEND_MIDDLE)
return fits ?
IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE :
IB_OPCODE_UC_SEND_MIDDLE;
else
return fits ?
IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE :
IB_OPCODE_UC_SEND_FIRST;
}
return -EINVAL;
}
static int next_opcode(struct rxe_qp *qp, struct rxe_send_wqe *wqe,
u32 opcode)
{
int fits = (wqe->dma.resid <= qp->mtu);
switch (qp_type(qp)) {
case IB_QPT_RC:
return next_opcode_rc(qp, opcode, fits);
case IB_QPT_UC:
return next_opcode_uc(qp, opcode, fits);
case IB_QPT_UD:
case IB_QPT_GSI:
switch (opcode) {
case IB_WR_SEND:
return IB_OPCODE_UD_SEND_ONLY;
case IB_WR_SEND_WITH_IMM:
return IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
}
break;
default:
break;
}
return -EINVAL;
}
static inline int check_init_depth(struct rxe_qp *qp, struct rxe_send_wqe *wqe)
{
int depth;
if (wqe->has_rd_atomic)
return 0;
qp->req.need_rd_atomic = 1;
depth = atomic_dec_return(&qp->req.rd_atomic);
if (depth >= 0) {
qp->req.need_rd_atomic = 0;
wqe->has_rd_atomic = 1;
return 0;
}
atomic_inc(&qp->req.rd_atomic);
return -EAGAIN;
}
static inline int get_mtu(struct rxe_qp *qp)
{
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
if ((qp_type(qp) == IB_QPT_RC) || (qp_type(qp) == IB_QPT_UC))
return qp->mtu;
return rxe->port.mtu_cap;
}
static struct sk_buff *init_req_packet(struct rxe_qp *qp,
struct rxe_av *av,
struct rxe_send_wqe *wqe,
int opcode, u32 payload,
struct rxe_pkt_info *pkt)
{
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
struct sk_buff *skb;
struct rxe_send_wr *ibwr = &wqe->wr;
int pad = (-payload) & 0x3;
int paylen;
int solicited;
u32 qp_num;
int ack_req;
/* length from start of bth to end of icrc */
paylen = rxe_opcode[opcode].length + payload + pad + RXE_ICRC_SIZE;
pkt->paylen = paylen;
/* init skb */
skb = rxe_init_packet(rxe, av, paylen, pkt);
if (unlikely(!skb))
return NULL;
/* init bth */
solicited = (ibwr->send_flags & IB_SEND_SOLICITED) &&
(pkt->mask & RXE_END_MASK) &&
((pkt->mask & (RXE_SEND_MASK)) ||
(pkt->mask & (RXE_WRITE_MASK | RXE_IMMDT_MASK)) ==
(RXE_WRITE_MASK | RXE_IMMDT_MASK));
qp_num = (pkt->mask & RXE_DETH_MASK) ? ibwr->wr.ud.remote_qpn :
qp->attr.dest_qp_num;
ack_req = ((pkt->mask & RXE_END_MASK) ||
(qp->req.noack_pkts++ > RXE_MAX_PKT_PER_ACK));
if (ack_req)
qp->req.noack_pkts = 0;
bth_init(pkt, pkt->opcode, solicited, 0, pad, IB_DEFAULT_PKEY_FULL, qp_num,
ack_req, pkt->psn);
/* init optional headers */
if (pkt->mask & RXE_RETH_MASK) {
if (pkt->mask & RXE_FETH_MASK)
reth_set_rkey(pkt, ibwr->wr.flush.rkey);
else
reth_set_rkey(pkt, ibwr->wr.rdma.rkey);
reth_set_va(pkt, wqe->iova);
reth_set_len(pkt, wqe->dma.resid);
}
/* Fill Flush Extension Transport Header */
if (pkt->mask & RXE_FETH_MASK)
feth_init(pkt, ibwr->wr.flush.type, ibwr->wr.flush.level);
if (pkt->mask & RXE_IMMDT_MASK)
immdt_set_imm(pkt, ibwr->ex.imm_data);
if (pkt->mask & RXE_IETH_MASK)
ieth_set_rkey(pkt, ibwr->ex.invalidate_rkey);
if (pkt->mask & RXE_ATMETH_MASK) {
atmeth_set_va(pkt, wqe->iova);
if (opcode == IB_OPCODE_RC_COMPARE_SWAP) {
atmeth_set_swap_add(pkt, ibwr->wr.atomic.swap);
atmeth_set_comp(pkt, ibwr->wr.atomic.compare_add);
} else {
atmeth_set_swap_add(pkt, ibwr->wr.atomic.compare_add);
}
atmeth_set_rkey(pkt, ibwr->wr.atomic.rkey);
}
if (pkt->mask & RXE_DETH_MASK) {
if (qp->ibqp.qp_num == 1)
deth_set_qkey(pkt, GSI_QKEY);
else
deth_set_qkey(pkt, ibwr->wr.ud.remote_qkey);
deth_set_sqp(pkt, qp->ibqp.qp_num);
}
return skb;
}
static int finish_packet(struct rxe_qp *qp, struct rxe_av *av,
struct rxe_send_wqe *wqe, struct rxe_pkt_info *pkt,
struct sk_buff *skb, u32 payload)
{
int err;
err = rxe_prepare(av, pkt, skb);
if (err)
return err;
if (pkt->mask & RXE_WRITE_OR_SEND_MASK) {
if (wqe->wr.send_flags & IB_SEND_INLINE) {
u8 *tmp = &wqe->dma.inline_data[wqe->dma.sge_offset];
memcpy(payload_addr(pkt), tmp, payload);
wqe->dma.resid -= payload;
wqe->dma.sge_offset += payload;
} else {
err = copy_data(qp->pd, 0, &wqe->dma,
payload_addr(pkt), payload,
RXE_FROM_MR_OBJ);
if (err)
return err;
}
if (bth_pad(pkt)) {
u8 *pad = payload_addr(pkt) + payload;
memset(pad, 0, bth_pad(pkt));
}
} else if (pkt->mask & RXE_FLUSH_MASK) {
/* oA19-2: shall have no payload. */
wqe->dma.resid = 0;
}
if (pkt->mask & RXE_ATOMIC_WRITE_MASK) {
memcpy(payload_addr(pkt), wqe->dma.atomic_wr, payload);
wqe->dma.resid -= payload;
}
return 0;
}
static void update_wqe_state(struct rxe_qp *qp,
struct rxe_send_wqe *wqe,
struct rxe_pkt_info *pkt)
{
if (pkt->mask & RXE_END_MASK) {
if (qp_type(qp) == IB_QPT_RC)
wqe->state = wqe_state_pending;
} else {
wqe->state = wqe_state_processing;
}
}
static void update_wqe_psn(struct rxe_qp *qp,
struct rxe_send_wqe *wqe,
struct rxe_pkt_info *pkt,
u32 payload)
{
/* number of packets left to send including current one */
int num_pkt = (wqe->dma.resid + payload + qp->mtu - 1) / qp->mtu;
/* handle zero length packet case */
if (num_pkt == 0)
num_pkt = 1;
if (pkt->mask & RXE_START_MASK) {
wqe->first_psn = qp->req.psn;
wqe->last_psn = (qp->req.psn + num_pkt - 1) & BTH_PSN_MASK;
}
if (pkt->mask & RXE_READ_MASK)
qp->req.psn = (wqe->first_psn + num_pkt) & BTH_PSN_MASK;
else
qp->req.psn = (qp->req.psn + 1) & BTH_PSN_MASK;
}
static void save_state(struct rxe_send_wqe *wqe,
struct rxe_qp *qp,
struct rxe_send_wqe *rollback_wqe,
u32 *rollback_psn)
{
rollback_wqe->state = wqe->state;
rollback_wqe->first_psn = wqe->first_psn;
rollback_wqe->last_psn = wqe->last_psn;
rollback_wqe->dma = wqe->dma;
*rollback_psn = qp->req.psn;
}
static void rollback_state(struct rxe_send_wqe *wqe,
struct rxe_qp *qp,
struct rxe_send_wqe *rollback_wqe,
u32 rollback_psn)
{
wqe->state = rollback_wqe->state;
wqe->first_psn = rollback_wqe->first_psn;
wqe->last_psn = rollback_wqe->last_psn;
wqe->dma = rollback_wqe->dma;
qp->req.psn = rollback_psn;
}
static void update_state(struct rxe_qp *qp, struct rxe_pkt_info *pkt)
{
qp->req.opcode = pkt->opcode;
if (pkt->mask & RXE_END_MASK)
qp->req.wqe_index = queue_next_index(qp->sq.queue,
qp->req.wqe_index);
qp->need_req_skb = 0;
if (qp->qp_timeout_jiffies && !timer_pending(&qp->retrans_timer))
mod_timer(&qp->retrans_timer,
jiffies + qp->qp_timeout_jiffies);
}
static int rxe_do_local_ops(struct rxe_qp *qp, struct rxe_send_wqe *wqe)
{
u8 opcode = wqe->wr.opcode;
u32 rkey;
int ret;
switch (opcode) {
case IB_WR_LOCAL_INV:
rkey = wqe->wr.ex.invalidate_rkey;
if (rkey_is_mw(rkey))
ret = rxe_invalidate_mw(qp, rkey);
else
ret = rxe_invalidate_mr(qp, rkey);
if (unlikely(ret)) {
wqe->status = IB_WC_LOC_QP_OP_ERR;
return ret;
}
break;
case IB_WR_REG_MR:
ret = rxe_reg_fast_mr(qp, wqe);
if (unlikely(ret)) {
wqe->status = IB_WC_LOC_QP_OP_ERR;
return ret;
}
break;
case IB_WR_BIND_MW:
ret = rxe_bind_mw(qp, wqe);
if (unlikely(ret)) {
wqe->status = IB_WC_MW_BIND_ERR;
return ret;
}
break;
default:
rxe_dbg_qp(qp, "Unexpected send wqe opcode %d\n", opcode);
wqe->status = IB_WC_LOC_QP_OP_ERR;
return -EINVAL;
}
wqe->state = wqe_state_done;
wqe->status = IB_WC_SUCCESS;
qp->req.wqe_index = queue_next_index(qp->sq.queue, qp->req.wqe_index);
/* There is no ack coming for local work requests
* which can lead to a deadlock. So go ahead and complete
* it now.
*/
rxe_sched_task(&qp->comp.task);
return 0;
}
int rxe_requester(struct rxe_qp *qp)
{
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
struct rxe_pkt_info pkt;
struct sk_buff *skb;
struct rxe_send_wqe *wqe;
enum rxe_hdr_mask mask;
u32 payload;
int mtu;
int opcode;
int err;
int ret;
struct rxe_send_wqe rollback_wqe;
u32 rollback_psn;
struct rxe_queue *q = qp->sq.queue;
struct rxe_ah *ah;
struct rxe_av *av;
unsigned long flags;
spin_lock_irqsave(&qp->state_lock, flags);
if (unlikely(!qp->valid)) {
spin_unlock_irqrestore(&qp->state_lock, flags);
goto exit;
}
if (unlikely(qp_state(qp) == IB_QPS_ERR)) {
wqe = __req_next_wqe(qp);
spin_unlock_irqrestore(&qp->state_lock, flags);
if (wqe)
goto err;
else
goto exit;
}
if (unlikely(qp_state(qp) == IB_QPS_RESET)) {
qp->req.wqe_index = queue_get_consumer(q,
QUEUE_TYPE_FROM_CLIENT);
qp->req.opcode = -1;
qp->req.need_rd_atomic = 0;
qp->req.wait_psn = 0;
qp->req.need_retry = 0;
qp->req.wait_for_rnr_timer = 0;
spin_unlock_irqrestore(&qp->state_lock, flags);
goto exit;
}
spin_unlock_irqrestore(&qp->state_lock, flags);
/* we come here if the retransmit timer has fired
* or if the rnr timer has fired. If the retransmit
* timer fires while we are processing an RNR NAK wait
* until the rnr timer has fired before starting the
* retry flow
*/
if (unlikely(qp->req.need_retry && !qp->req.wait_for_rnr_timer)) {
req_retry(qp);
qp->req.need_retry = 0;
}
wqe = req_next_wqe(qp);
if (unlikely(!wqe))
goto exit;
if (rxe_wqe_is_fenced(qp, wqe)) {
qp->req.wait_fence = 1;
goto exit;
}
if (wqe->mask & WR_LOCAL_OP_MASK) {
err = rxe_do_local_ops(qp, wqe);
if (unlikely(err))
goto err;
else
goto done;
}
if (unlikely(qp_type(qp) == IB_QPT_RC &&
psn_compare(qp->req.psn, (qp->comp.psn +
RXE_MAX_UNACKED_PSNS)) > 0)) {
qp->req.wait_psn = 1;
goto exit;
}
/* Limit the number of inflight SKBs per QP */
if (unlikely(atomic_read(&qp->skb_out) >
RXE_INFLIGHT_SKBS_PER_QP_HIGH)) {
qp->need_req_skb = 1;
goto exit;
}
opcode = next_opcode(qp, wqe, wqe->wr.opcode);
if (unlikely(opcode < 0)) {
wqe->status = IB_WC_LOC_QP_OP_ERR;
goto err;
}
mask = rxe_opcode[opcode].mask;
if (unlikely(mask & (RXE_READ_OR_ATOMIC_MASK |
RXE_ATOMIC_WRITE_MASK))) {
if (check_init_depth(qp, wqe))
goto exit;
}
mtu = get_mtu(qp);
payload = (mask & (RXE_WRITE_OR_SEND_MASK | RXE_ATOMIC_WRITE_MASK)) ?
wqe->dma.resid : 0;
if (payload > mtu) {
if (qp_type(qp) == IB_QPT_UD) {
/* C10-93.1.1: If the total sum of all the buffer lengths specified for a
* UD message exceeds the MTU of the port as returned by QueryHCA, the CI
* shall not emit any packets for this message. Further, the CI shall not
* generate an error due to this condition.
*/
/* fake a successful UD send */
wqe->first_psn = qp->req.psn;
wqe->last_psn = qp->req.psn;
qp->req.psn = (qp->req.psn + 1) & BTH_PSN_MASK;
qp->req.opcode = IB_OPCODE_UD_SEND_ONLY;
qp->req.wqe_index = queue_next_index(qp->sq.queue,
qp->req.wqe_index);
wqe->state = wqe_state_done;
wqe->status = IB_WC_SUCCESS;
rxe_sched_task(&qp->comp.task);
goto done;
}
payload = mtu;
}
pkt.rxe = rxe;
pkt.opcode = opcode;
pkt.qp = qp;
pkt.psn = qp->req.psn;
pkt.mask = rxe_opcode[opcode].mask;
pkt.wqe = wqe;
/* save wqe state before we build and send packet */
save_state(wqe, qp, &rollback_wqe, &rollback_psn);
av = rxe_get_av(&pkt, &ah);
if (unlikely(!av)) {
rxe_dbg_qp(qp, "Failed no address vector\n");
wqe->status = IB_WC_LOC_QP_OP_ERR;
goto err;
}
skb = init_req_packet(qp, av, wqe, opcode, payload, &pkt);
if (unlikely(!skb)) {
rxe_dbg_qp(qp, "Failed allocating skb\n");
wqe->status = IB_WC_LOC_QP_OP_ERR;
if (ah)
rxe_put(ah);
goto err;
}
err = finish_packet(qp, av, wqe, &pkt, skb, payload);
if (unlikely(err)) {
rxe_dbg_qp(qp, "Error during finish packet\n");
if (err == -EFAULT)
wqe->status = IB_WC_LOC_PROT_ERR;
else
wqe->status = IB_WC_LOC_QP_OP_ERR;
kfree_skb(skb);
if (ah)
rxe_put(ah);
goto err;
}
if (ah)
rxe_put(ah);
/* update wqe state as though we had sent it */
update_wqe_state(qp, wqe, &pkt);
update_wqe_psn(qp, wqe, &pkt, payload);
err = rxe_xmit_packet(qp, &pkt, skb);
if (err) {
if (err != -EAGAIN) {
wqe->status = IB_WC_LOC_QP_OP_ERR;
goto err;
}
/* the packet was dropped so reset wqe to the state
* before we sent it so we can try to resend
*/
rollback_state(wqe, qp, &rollback_wqe, rollback_psn);
/* force a delay until the dropped packet is freed and
* the send queue is drained below the low water mark
*/
qp->need_req_skb = 1;
rxe_sched_task(&qp->req.task);
goto exit;
}
update_state(qp, &pkt);
/* A non-zero return value will cause rxe_do_task to
* exit its loop and end the work item. A zero return
* will continue looping and return to rxe_requester
*/
done:
ret = 0;
goto out;
err:
/* update wqe_index for each wqe completion */
qp->req.wqe_index = queue_next_index(qp->sq.queue, qp->req.wqe_index);
wqe->state = wqe_state_error;
rxe_qp_error(qp);
exit:
ret = -EAGAIN;
out:
return ret;
}
| linux-master | drivers/infiniband/sw/rxe/rxe_req.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/netdevice.h>
#include <linux/if.h>
#include <linux/if_vlan.h>
#include <net/udp_tunnel.h>
#include <net/sch_generic.h>
#include <linux/netfilter.h>
#include <rdma/ib_addr.h>
#include "rxe.h"
#include "rxe_net.h"
#include "rxe_loc.h"
static struct rxe_recv_sockets recv_sockets;
static struct dst_entry *rxe_find_route4(struct rxe_qp *qp,
struct net_device *ndev,
struct in_addr *saddr,
struct in_addr *daddr)
{
struct rtable *rt;
struct flowi4 fl = { { 0 } };
memset(&fl, 0, sizeof(fl));
fl.flowi4_oif = ndev->ifindex;
memcpy(&fl.saddr, saddr, sizeof(*saddr));
memcpy(&fl.daddr, daddr, sizeof(*daddr));
fl.flowi4_proto = IPPROTO_UDP;
rt = ip_route_output_key(&init_net, &fl);
if (IS_ERR(rt)) {
rxe_dbg_qp(qp, "no route to %pI4\n", &daddr->s_addr);
return NULL;
}
return &rt->dst;
}
#if IS_ENABLED(CONFIG_IPV6)
static struct dst_entry *rxe_find_route6(struct rxe_qp *qp,
struct net_device *ndev,
struct in6_addr *saddr,
struct in6_addr *daddr)
{
struct dst_entry *ndst;
struct flowi6 fl6 = { { 0 } };
memset(&fl6, 0, sizeof(fl6));
fl6.flowi6_oif = ndev->ifindex;
memcpy(&fl6.saddr, saddr, sizeof(*saddr));
memcpy(&fl6.daddr, daddr, sizeof(*daddr));
fl6.flowi6_proto = IPPROTO_UDP;
ndst = ipv6_stub->ipv6_dst_lookup_flow(sock_net(recv_sockets.sk6->sk),
recv_sockets.sk6->sk, &fl6,
NULL);
if (IS_ERR(ndst)) {
rxe_dbg_qp(qp, "no route to %pI6\n", daddr);
return NULL;
}
if (unlikely(ndst->error)) {
rxe_dbg_qp(qp, "no route to %pI6\n", daddr);
goto put;
}
return ndst;
put:
dst_release(ndst);
return NULL;
}
#else
static struct dst_entry *rxe_find_route6(struct rxe_qp *qp,
struct net_device *ndev,
struct in6_addr *saddr,
struct in6_addr *daddr)
{
return NULL;
}
#endif
static struct dst_entry *rxe_find_route(struct net_device *ndev,
struct rxe_qp *qp,
struct rxe_av *av)
{
struct dst_entry *dst = NULL;
if (qp_type(qp) == IB_QPT_RC)
dst = sk_dst_get(qp->sk->sk);
if (!dst || !dst_check(dst, qp->dst_cookie)) {
if (dst)
dst_release(dst);
if (av->network_type == RXE_NETWORK_TYPE_IPV4) {
struct in_addr *saddr;
struct in_addr *daddr;
saddr = &av->sgid_addr._sockaddr_in.sin_addr;
daddr = &av->dgid_addr._sockaddr_in.sin_addr;
dst = rxe_find_route4(qp, ndev, saddr, daddr);
} else if (av->network_type == RXE_NETWORK_TYPE_IPV6) {
struct in6_addr *saddr6;
struct in6_addr *daddr6;
saddr6 = &av->sgid_addr._sockaddr_in6.sin6_addr;
daddr6 = &av->dgid_addr._sockaddr_in6.sin6_addr;
dst = rxe_find_route6(qp, ndev, saddr6, daddr6);
#if IS_ENABLED(CONFIG_IPV6)
if (dst)
qp->dst_cookie =
rt6_get_cookie((struct rt6_info *)dst);
#endif
}
if (dst && (qp_type(qp) == IB_QPT_RC)) {
dst_hold(dst);
sk_dst_set(qp->sk->sk, dst);
}
}
return dst;
}
static int rxe_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
{
struct udphdr *udph;
struct rxe_dev *rxe;
struct net_device *ndev = skb->dev;
struct rxe_pkt_info *pkt = SKB_TO_PKT(skb);
/* takes a reference on rxe->ib_dev
* drop when skb is freed
*/
rxe = rxe_get_dev_from_net(ndev);
if (!rxe && is_vlan_dev(ndev))
rxe = rxe_get_dev_from_net(vlan_dev_real_dev(ndev));
if (!rxe)
goto drop;
if (skb_linearize(skb)) {
ib_device_put(&rxe->ib_dev);
goto drop;
}
udph = udp_hdr(skb);
pkt->rxe = rxe;
pkt->port_num = 1;
pkt->hdr = (u8 *)(udph + 1);
pkt->mask = RXE_GRH_MASK;
pkt->paylen = be16_to_cpu(udph->len) - sizeof(*udph);
/* remove udp header */
skb_pull(skb, sizeof(struct udphdr));
rxe_rcv(skb);
return 0;
drop:
kfree_skb(skb);
return 0;
}
static struct socket *rxe_setup_udp_tunnel(struct net *net, __be16 port,
bool ipv6)
{
int err;
struct socket *sock;
struct udp_port_cfg udp_cfg = { };
struct udp_tunnel_sock_cfg tnl_cfg = { };
if (ipv6) {
udp_cfg.family = AF_INET6;
udp_cfg.ipv6_v6only = 1;
} else {
udp_cfg.family = AF_INET;
}
udp_cfg.local_udp_port = port;
/* Create UDP socket */
err = udp_sock_create(net, &udp_cfg, &sock);
if (err < 0)
return ERR_PTR(err);
tnl_cfg.encap_type = 1;
tnl_cfg.encap_rcv = rxe_udp_encap_recv;
/* Setup UDP tunnel */
setup_udp_tunnel_sock(net, sock, &tnl_cfg);
return sock;
}
static void rxe_release_udp_tunnel(struct socket *sk)
{
if (sk)
udp_tunnel_sock_release(sk);
}
static void prepare_udp_hdr(struct sk_buff *skb, __be16 src_port,
__be16 dst_port)
{
struct udphdr *udph;
__skb_push(skb, sizeof(*udph));
skb_reset_transport_header(skb);
udph = udp_hdr(skb);
udph->dest = dst_port;
udph->source = src_port;
udph->len = htons(skb->len);
udph->check = 0;
}
static void prepare_ipv4_hdr(struct dst_entry *dst, struct sk_buff *skb,
__be32 saddr, __be32 daddr, __u8 proto,
__u8 tos, __u8 ttl, __be16 df, bool xnet)
{
struct iphdr *iph;
skb_scrub_packet(skb, xnet);
skb_clear_hash(skb);
skb_dst_set(skb, dst_clone(dst));
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
skb_push(skb, sizeof(struct iphdr));
skb_reset_network_header(skb);
iph = ip_hdr(skb);
iph->version = IPVERSION;
iph->ihl = sizeof(struct iphdr) >> 2;
iph->tot_len = htons(skb->len);
iph->frag_off = df;
iph->protocol = proto;
iph->tos = tos;
iph->daddr = daddr;
iph->saddr = saddr;
iph->ttl = ttl;
__ip_select_ident(dev_net(dst->dev), iph,
skb_shinfo(skb)->gso_segs ?: 1);
}
static void prepare_ipv6_hdr(struct dst_entry *dst, struct sk_buff *skb,
struct in6_addr *saddr, struct in6_addr *daddr,
__u8 proto, __u8 prio, __u8 ttl)
{
struct ipv6hdr *ip6h;
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED
| IPSKB_REROUTED);
skb_dst_set(skb, dst_clone(dst));
__skb_push(skb, sizeof(*ip6h));
skb_reset_network_header(skb);
ip6h = ipv6_hdr(skb);
ip6_flow_hdr(ip6h, prio, htonl(0));
ip6h->payload_len = htons(skb->len);
ip6h->nexthdr = proto;
ip6h->hop_limit = ttl;
ip6h->daddr = *daddr;
ip6h->saddr = *saddr;
ip6h->payload_len = htons(skb->len - sizeof(*ip6h));
}
static int prepare4(struct rxe_av *av, struct rxe_pkt_info *pkt,
struct sk_buff *skb)
{
struct rxe_qp *qp = pkt->qp;
struct dst_entry *dst;
bool xnet = false;
__be16 df = htons(IP_DF);
struct in_addr *saddr = &av->sgid_addr._sockaddr_in.sin_addr;
struct in_addr *daddr = &av->dgid_addr._sockaddr_in.sin_addr;
dst = rxe_find_route(skb->dev, qp, av);
if (!dst) {
rxe_dbg_qp(qp, "Host not reachable\n");
return -EHOSTUNREACH;
}
prepare_udp_hdr(skb, cpu_to_be16(qp->src_port),
cpu_to_be16(ROCE_V2_UDP_DPORT));
prepare_ipv4_hdr(dst, skb, saddr->s_addr, daddr->s_addr, IPPROTO_UDP,
av->grh.traffic_class, av->grh.hop_limit, df, xnet);
dst_release(dst);
return 0;
}
static int prepare6(struct rxe_av *av, struct rxe_pkt_info *pkt,
struct sk_buff *skb)
{
struct rxe_qp *qp = pkt->qp;
struct dst_entry *dst;
struct in6_addr *saddr = &av->sgid_addr._sockaddr_in6.sin6_addr;
struct in6_addr *daddr = &av->dgid_addr._sockaddr_in6.sin6_addr;
dst = rxe_find_route(skb->dev, qp, av);
if (!dst) {
rxe_dbg_qp(qp, "Host not reachable\n");
return -EHOSTUNREACH;
}
prepare_udp_hdr(skb, cpu_to_be16(qp->src_port),
cpu_to_be16(ROCE_V2_UDP_DPORT));
prepare_ipv6_hdr(dst, skb, saddr, daddr, IPPROTO_UDP,
av->grh.traffic_class,
av->grh.hop_limit);
dst_release(dst);
return 0;
}
int rxe_prepare(struct rxe_av *av, struct rxe_pkt_info *pkt,
struct sk_buff *skb)
{
int err = 0;
if (skb->protocol == htons(ETH_P_IP))
err = prepare4(av, pkt, skb);
else if (skb->protocol == htons(ETH_P_IPV6))
err = prepare6(av, pkt, skb);
if (ether_addr_equal(skb->dev->dev_addr, av->dmac))
pkt->mask |= RXE_LOOPBACK_MASK;
return err;
}
static void rxe_skb_tx_dtor(struct sk_buff *skb)
{
struct sock *sk = skb->sk;
struct rxe_qp *qp = sk->sk_user_data;
int skb_out = atomic_dec_return(&qp->skb_out);
if (unlikely(qp->need_req_skb &&
skb_out < RXE_INFLIGHT_SKBS_PER_QP_LOW))
rxe_sched_task(&qp->req.task);
rxe_put(qp);
}
static int rxe_send(struct sk_buff *skb, struct rxe_pkt_info *pkt)
{
int err;
skb->destructor = rxe_skb_tx_dtor;
skb->sk = pkt->qp->sk->sk;
rxe_get(pkt->qp);
atomic_inc(&pkt->qp->skb_out);
if (skb->protocol == htons(ETH_P_IP)) {
err = ip_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb);
} else if (skb->protocol == htons(ETH_P_IPV6)) {
err = ip6_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb);
} else {
rxe_dbg_qp(pkt->qp, "Unknown layer 3 protocol: %d\n",
skb->protocol);
atomic_dec(&pkt->qp->skb_out);
rxe_put(pkt->qp);
kfree_skb(skb);
return -EINVAL;
}
if (unlikely(net_xmit_eval(err))) {
rxe_dbg_qp(pkt->qp, "error sending packet: %d\n", err);
return -EAGAIN;
}
return 0;
}
/* fix up a send packet to match the packets
* received from UDP before looping them back
*/
static int rxe_loopback(struct sk_buff *skb, struct rxe_pkt_info *pkt)
{
memcpy(SKB_TO_PKT(skb), pkt, sizeof(*pkt));
if (skb->protocol == htons(ETH_P_IP))
skb_pull(skb, sizeof(struct iphdr));
else
skb_pull(skb, sizeof(struct ipv6hdr));
if (WARN_ON(!ib_device_try_get(&pkt->rxe->ib_dev))) {
kfree_skb(skb);
return -EIO;
}
/* remove udp header */
skb_pull(skb, sizeof(struct udphdr));
rxe_rcv(skb);
return 0;
}
int rxe_xmit_packet(struct rxe_qp *qp, struct rxe_pkt_info *pkt,
struct sk_buff *skb)
{
int err;
int is_request = pkt->mask & RXE_REQ_MASK;
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
unsigned long flags;
spin_lock_irqsave(&qp->state_lock, flags);
if ((is_request && (qp_state(qp) < IB_QPS_RTS)) ||
(!is_request && (qp_state(qp) < IB_QPS_RTR))) {
spin_unlock_irqrestore(&qp->state_lock, flags);
rxe_dbg_qp(qp, "Packet dropped. QP is not in ready state\n");
goto drop;
}
spin_unlock_irqrestore(&qp->state_lock, flags);
rxe_icrc_generate(skb, pkt);
if (pkt->mask & RXE_LOOPBACK_MASK)
err = rxe_loopback(skb, pkt);
else
err = rxe_send(skb, pkt);
if (err) {
rxe_counter_inc(rxe, RXE_CNT_SEND_ERR);
return err;
}
if ((qp_type(qp) != IB_QPT_RC) &&
(pkt->mask & RXE_END_MASK)) {
pkt->wqe->state = wqe_state_done;
rxe_sched_task(&qp->comp.task);
}
rxe_counter_inc(rxe, RXE_CNT_SENT_PKTS);
goto done;
drop:
kfree_skb(skb);
err = 0;
done:
return err;
}
struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av,
int paylen, struct rxe_pkt_info *pkt)
{
unsigned int hdr_len;
struct sk_buff *skb = NULL;
struct net_device *ndev;
const struct ib_gid_attr *attr;
const int port_num = 1;
attr = rdma_get_gid_attr(&rxe->ib_dev, port_num, av->grh.sgid_index);
if (IS_ERR(attr))
return NULL;
if (av->network_type == RXE_NETWORK_TYPE_IPV4)
hdr_len = ETH_HLEN + sizeof(struct udphdr) +
sizeof(struct iphdr);
else
hdr_len = ETH_HLEN + sizeof(struct udphdr) +
sizeof(struct ipv6hdr);
rcu_read_lock();
ndev = rdma_read_gid_attr_ndev_rcu(attr);
if (IS_ERR(ndev)) {
rcu_read_unlock();
goto out;
}
skb = alloc_skb(paylen + hdr_len + LL_RESERVED_SPACE(ndev),
GFP_ATOMIC);
if (unlikely(!skb)) {
rcu_read_unlock();
goto out;
}
skb_reserve(skb, hdr_len + LL_RESERVED_SPACE(ndev));
/* FIXME: hold reference to this netdev until life of this skb. */
skb->dev = ndev;
rcu_read_unlock();
if (av->network_type == RXE_NETWORK_TYPE_IPV4)
skb->protocol = htons(ETH_P_IP);
else
skb->protocol = htons(ETH_P_IPV6);
pkt->rxe = rxe;
pkt->port_num = port_num;
pkt->hdr = skb_put(skb, paylen);
pkt->mask |= RXE_GRH_MASK;
out:
rdma_put_gid_attr(attr);
return skb;
}
/*
* this is required by rxe_cfg to match rxe devices in
* /sys/class/infiniband up with their underlying ethernet devices
*/
const char *rxe_parent_name(struct rxe_dev *rxe, unsigned int port_num)
{
return rxe->ndev->name;
}
int rxe_net_add(const char *ibdev_name, struct net_device *ndev)
{
int err;
struct rxe_dev *rxe = NULL;
rxe = ib_alloc_device(rxe_dev, ib_dev);
if (!rxe)
return -ENOMEM;
rxe->ndev = ndev;
err = rxe_add(rxe, ndev->mtu, ibdev_name);
if (err) {
ib_dealloc_device(&rxe->ib_dev);
return err;
}
return 0;
}
static void rxe_port_event(struct rxe_dev *rxe,
enum ib_event_type event)
{
struct ib_event ev;
ev.device = &rxe->ib_dev;
ev.element.port_num = 1;
ev.event = event;
ib_dispatch_event(&ev);
}
/* Caller must hold net_info_lock */
void rxe_port_up(struct rxe_dev *rxe)
{
struct rxe_port *port;
port = &rxe->port;
port->attr.state = IB_PORT_ACTIVE;
rxe_port_event(rxe, IB_EVENT_PORT_ACTIVE);
dev_info(&rxe->ib_dev.dev, "set active\n");
}
/* Caller must hold net_info_lock */
void rxe_port_down(struct rxe_dev *rxe)
{
struct rxe_port *port;
port = &rxe->port;
port->attr.state = IB_PORT_DOWN;
rxe_port_event(rxe, IB_EVENT_PORT_ERR);
rxe_counter_inc(rxe, RXE_CNT_LINK_DOWNED);
dev_info(&rxe->ib_dev.dev, "set down\n");
}
void rxe_set_port_state(struct rxe_dev *rxe)
{
if (netif_running(rxe->ndev) && netif_carrier_ok(rxe->ndev))
rxe_port_up(rxe);
else
rxe_port_down(rxe);
}
static int rxe_notify(struct notifier_block *not_blk,
unsigned long event,
void *arg)
{
struct net_device *ndev = netdev_notifier_info_to_dev(arg);
struct rxe_dev *rxe = rxe_get_dev_from_net(ndev);
if (!rxe)
return NOTIFY_OK;
switch (event) {
case NETDEV_UNREGISTER:
ib_unregister_device_queued(&rxe->ib_dev);
break;
case NETDEV_UP:
rxe_port_up(rxe);
break;
case NETDEV_DOWN:
rxe_port_down(rxe);
break;
case NETDEV_CHANGEMTU:
rxe_dbg_dev(rxe, "%s changed mtu to %d\n", ndev->name, ndev->mtu);
rxe_set_mtu(rxe, ndev->mtu);
break;
case NETDEV_CHANGE:
rxe_set_port_state(rxe);
break;
case NETDEV_REBOOT:
case NETDEV_GOING_DOWN:
case NETDEV_CHANGEADDR:
case NETDEV_CHANGENAME:
case NETDEV_FEAT_CHANGE:
default:
rxe_dbg_dev(rxe, "ignoring netdev event = %ld for %s\n",
event, ndev->name);
break;
}
ib_device_put(&rxe->ib_dev);
return NOTIFY_OK;
}
static struct notifier_block rxe_net_notifier = {
.notifier_call = rxe_notify,
};
static int rxe_net_ipv4_init(void)
{
recv_sockets.sk4 = rxe_setup_udp_tunnel(&init_net,
htons(ROCE_V2_UDP_DPORT), false);
if (IS_ERR(recv_sockets.sk4)) {
recv_sockets.sk4 = NULL;
pr_err("Failed to create IPv4 UDP tunnel\n");
return -1;
}
return 0;
}
static int rxe_net_ipv6_init(void)
{
#if IS_ENABLED(CONFIG_IPV6)
recv_sockets.sk6 = rxe_setup_udp_tunnel(&init_net,
htons(ROCE_V2_UDP_DPORT), true);
if (PTR_ERR(recv_sockets.sk6) == -EAFNOSUPPORT) {
recv_sockets.sk6 = NULL;
pr_warn("IPv6 is not supported, can not create a UDPv6 socket\n");
return 0;
}
if (IS_ERR(recv_sockets.sk6)) {
recv_sockets.sk6 = NULL;
pr_err("Failed to create IPv6 UDP tunnel\n");
return -1;
}
#endif
return 0;
}
void rxe_net_exit(void)
{
rxe_release_udp_tunnel(recv_sockets.sk6);
rxe_release_udp_tunnel(recv_sockets.sk4);
unregister_netdevice_notifier(&rxe_net_notifier);
}
int rxe_net_init(void)
{
int err;
recv_sockets.sk6 = NULL;
err = rxe_net_ipv4_init();
if (err)
return err;
err = rxe_net_ipv6_init();
if (err)
goto err_out;
err = register_netdevice_notifier(&rxe_net_notifier);
if (err) {
pr_err("Failed to register netdev notifier\n");
goto err_out;
}
return 0;
err_out:
rxe_net_exit();
return err;
}
| linux-master | drivers/infiniband/sw/rxe/rxe_net.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include "rxe.h"
#include "rxe_loc.h"
void rxe_init_av(struct rdma_ah_attr *attr, struct rxe_av *av)
{
rxe_av_from_attr(rdma_ah_get_port_num(attr), av, attr);
rxe_av_fill_ip_info(av, attr);
memcpy(av->dmac, attr->roce.dmac, ETH_ALEN);
}
static int chk_attr(void *obj, struct rdma_ah_attr *attr, bool obj_is_ah)
{
const struct ib_global_route *grh = rdma_ah_read_grh(attr);
struct rxe_port *port;
struct rxe_dev *rxe;
struct rxe_qp *qp;
struct rxe_ah *ah;
int type;
if (obj_is_ah) {
ah = obj;
rxe = to_rdev(ah->ibah.device);
} else {
qp = obj;
rxe = to_rdev(qp->ibqp.device);
}
port = &rxe->port;
if (rdma_ah_get_ah_flags(attr) & IB_AH_GRH) {
if (grh->sgid_index > port->attr.gid_tbl_len) {
if (obj_is_ah)
rxe_dbg_ah(ah, "invalid sgid index = %d\n",
grh->sgid_index);
else
rxe_dbg_qp(qp, "invalid sgid index = %d\n",
grh->sgid_index);
return -EINVAL;
}
type = rdma_gid_attr_network_type(grh->sgid_attr);
if (type < RDMA_NETWORK_IPV4 ||
type > RDMA_NETWORK_IPV6) {
if (obj_is_ah)
rxe_dbg_ah(ah, "invalid network type for rdma_rxe = %d\n",
type);
else
rxe_dbg_qp(qp, "invalid network type for rdma_rxe = %d\n",
type);
return -EINVAL;
}
}
return 0;
}
int rxe_av_chk_attr(struct rxe_qp *qp, struct rdma_ah_attr *attr)
{
return chk_attr(qp, attr, false);
}
int rxe_ah_chk_attr(struct rxe_ah *ah, struct rdma_ah_attr *attr)
{
return chk_attr(ah, attr, true);
}
void rxe_av_from_attr(u8 port_num, struct rxe_av *av,
struct rdma_ah_attr *attr)
{
const struct ib_global_route *grh = rdma_ah_read_grh(attr);
memset(av, 0, sizeof(*av));
memcpy(av->grh.dgid.raw, grh->dgid.raw, sizeof(grh->dgid.raw));
av->grh.flow_label = grh->flow_label;
av->grh.sgid_index = grh->sgid_index;
av->grh.hop_limit = grh->hop_limit;
av->grh.traffic_class = grh->traffic_class;
av->port_num = port_num;
}
void rxe_av_to_attr(struct rxe_av *av, struct rdma_ah_attr *attr)
{
struct ib_global_route *grh = rdma_ah_retrieve_grh(attr);
attr->type = RDMA_AH_ATTR_TYPE_ROCE;
memcpy(grh->dgid.raw, av->grh.dgid.raw, sizeof(av->grh.dgid.raw));
grh->flow_label = av->grh.flow_label;
grh->sgid_index = av->grh.sgid_index;
grh->hop_limit = av->grh.hop_limit;
grh->traffic_class = av->grh.traffic_class;
rdma_ah_set_ah_flags(attr, IB_AH_GRH);
rdma_ah_set_port_num(attr, av->port_num);
}
void rxe_av_fill_ip_info(struct rxe_av *av, struct rdma_ah_attr *attr)
{
const struct ib_gid_attr *sgid_attr = attr->grh.sgid_attr;
int ibtype;
int type;
rdma_gid2ip((struct sockaddr *)&av->sgid_addr, &sgid_attr->gid);
rdma_gid2ip((struct sockaddr *)&av->dgid_addr,
&rdma_ah_read_grh(attr)->dgid);
ibtype = rdma_gid_attr_network_type(sgid_attr);
switch (ibtype) {
case RDMA_NETWORK_IPV4:
type = RXE_NETWORK_TYPE_IPV4;
break;
case RDMA_NETWORK_IPV6:
type = RXE_NETWORK_TYPE_IPV6;
break;
default:
/* not reached - checked in rxe_av_chk_attr */
type = 0;
break;
}
av->network_type = type;
}
struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt, struct rxe_ah **ahp)
{
struct rxe_ah *ah;
u32 ah_num;
if (ahp)
*ahp = NULL;
if (!pkt || !pkt->qp)
return NULL;
if (qp_type(pkt->qp) == IB_QPT_RC || qp_type(pkt->qp) == IB_QPT_UC)
return &pkt->qp->pri_av;
if (!pkt->wqe)
return NULL;
ah_num = pkt->wqe->wr.wr.ud.ah_num;
if (ah_num) {
/* only new user provider or kernel client */
ah = rxe_pool_get_index(&pkt->rxe->ah_pool, ah_num);
if (!ah) {
rxe_dbg_qp(pkt->qp, "Unable to find AH matching ah_num\n");
return NULL;
}
if (rxe_ah_pd(ah) != pkt->qp->pd) {
rxe_dbg_qp(pkt->qp, "PDs don't match for AH and QP\n");
rxe_put(ah);
return NULL;
}
if (ahp)
*ahp = ah;
else
rxe_put(ah);
return &ah->av;
}
/* only old user provider for UD sends*/
return &pkt->wqe->wr.wr.ud.av;
}
| linux-master | drivers/infiniband/sw/rxe/rxe_av.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2017 Mellanox Technologies Ltd. All rights reserved.
*/
#include "rxe.h"
#include "rxe_hw_counters.h"
static const struct rdma_stat_desc rxe_counter_descs[] = {
[RXE_CNT_SENT_PKTS].name = "sent_pkts",
[RXE_CNT_RCVD_PKTS].name = "rcvd_pkts",
[RXE_CNT_DUP_REQ].name = "duplicate_request",
[RXE_CNT_OUT_OF_SEQ_REQ].name = "out_of_seq_request",
[RXE_CNT_RCV_RNR].name = "rcvd_rnr_err",
[RXE_CNT_SND_RNR].name = "send_rnr_err",
[RXE_CNT_RCV_SEQ_ERR].name = "rcvd_seq_err",
[RXE_CNT_COMPLETER_SCHED].name = "ack_deferred",
[RXE_CNT_RETRY_EXCEEDED].name = "retry_exceeded_err",
[RXE_CNT_RNR_RETRY_EXCEEDED].name = "retry_rnr_exceeded_err",
[RXE_CNT_COMP_RETRY].name = "completer_retry_err",
[RXE_CNT_SEND_ERR].name = "send_err",
[RXE_CNT_LINK_DOWNED].name = "link_downed",
[RXE_CNT_RDMA_SEND].name = "rdma_sends",
[RXE_CNT_RDMA_RECV].name = "rdma_recvs",
};
int rxe_ib_get_hw_stats(struct ib_device *ibdev,
struct rdma_hw_stats *stats,
u32 port, int index)
{
struct rxe_dev *dev = to_rdev(ibdev);
unsigned int cnt;
if (!port || !stats)
return -EINVAL;
for (cnt = 0; cnt < ARRAY_SIZE(rxe_counter_descs); cnt++)
stats->value[cnt] = atomic64_read(&dev->stats_counters[cnt]);
return ARRAY_SIZE(rxe_counter_descs);
}
struct rdma_hw_stats *rxe_ib_alloc_hw_port_stats(struct ib_device *ibdev,
u32 port_num)
{
BUILD_BUG_ON(ARRAY_SIZE(rxe_counter_descs) != RXE_NUM_OF_COUNTERS);
return rdma_alloc_hw_stats_struct(rxe_counter_descs,
ARRAY_SIZE(rxe_counter_descs),
RDMA_HW_STATS_DEFAULT_LIFESPAN);
}
| linux-master | drivers/infiniband/sw/rxe/rxe_hw_counters.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/vmalloc.h>
#include <rdma/uverbs_ioctl.h>
#include "rxe.h"
#include "rxe_loc.h"
#include "rxe_queue.h"
#include "rxe_task.h"
static int rxe_qp_chk_cap(struct rxe_dev *rxe, struct ib_qp_cap *cap,
int has_srq)
{
if (cap->max_send_wr > rxe->attr.max_qp_wr) {
rxe_dbg_dev(rxe, "invalid send wr = %u > %d\n",
cap->max_send_wr, rxe->attr.max_qp_wr);
goto err1;
}
if (cap->max_send_sge > rxe->attr.max_send_sge) {
rxe_dbg_dev(rxe, "invalid send sge = %u > %d\n",
cap->max_send_sge, rxe->attr.max_send_sge);
goto err1;
}
if (!has_srq) {
if (cap->max_recv_wr > rxe->attr.max_qp_wr) {
rxe_dbg_dev(rxe, "invalid recv wr = %u > %d\n",
cap->max_recv_wr, rxe->attr.max_qp_wr);
goto err1;
}
if (cap->max_recv_sge > rxe->attr.max_recv_sge) {
rxe_dbg_dev(rxe, "invalid recv sge = %u > %d\n",
cap->max_recv_sge, rxe->attr.max_recv_sge);
goto err1;
}
}
if (cap->max_inline_data > rxe->max_inline_data) {
rxe_dbg_dev(rxe, "invalid max inline data = %u > %d\n",
cap->max_inline_data, rxe->max_inline_data);
goto err1;
}
return 0;
err1:
return -EINVAL;
}
int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init)
{
struct ib_qp_cap *cap = &init->cap;
struct rxe_port *port;
int port_num = init->port_num;
switch (init->qp_type) {
case IB_QPT_GSI:
case IB_QPT_RC:
case IB_QPT_UC:
case IB_QPT_UD:
break;
default:
return -EOPNOTSUPP;
}
if (!init->recv_cq || !init->send_cq) {
rxe_dbg_dev(rxe, "missing cq\n");
goto err1;
}
if (rxe_qp_chk_cap(rxe, cap, !!init->srq))
goto err1;
if (init->qp_type == IB_QPT_GSI) {
if (!rdma_is_port_valid(&rxe->ib_dev, port_num)) {
rxe_dbg_dev(rxe, "invalid port = %d\n", port_num);
goto err1;
}
port = &rxe->port;
if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) {
rxe_dbg_dev(rxe, "GSI QP exists for port %d\n", port_num);
goto err1;
}
}
return 0;
err1:
return -EINVAL;
}
static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n)
{
qp->resp.res_head = 0;
qp->resp.res_tail = 0;
qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL);
if (!qp->resp.resources)
return -ENOMEM;
return 0;
}
static void free_rd_atomic_resources(struct rxe_qp *qp)
{
if (qp->resp.resources) {
int i;
for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
struct resp_res *res = &qp->resp.resources[i];
free_rd_atomic_resource(res);
}
kfree(qp->resp.resources);
qp->resp.resources = NULL;
}
}
void free_rd_atomic_resource(struct resp_res *res)
{
res->type = 0;
}
static void cleanup_rd_atomic_resources(struct rxe_qp *qp)
{
int i;
struct resp_res *res;
if (qp->resp.resources) {
for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
res = &qp->resp.resources[i];
free_rd_atomic_resource(res);
}
}
}
static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp,
struct ib_qp_init_attr *init)
{
struct rxe_port *port;
u32 qpn;
qp->sq_sig_type = init->sq_sig_type;
qp->attr.path_mtu = 1;
qp->mtu = ib_mtu_enum_to_int(qp->attr.path_mtu);
qpn = qp->elem.index;
port = &rxe->port;
switch (init->qp_type) {
case IB_QPT_GSI:
qp->ibqp.qp_num = 1;
port->qp_gsi_index = qpn;
qp->attr.port_num = init->port_num;
break;
default:
qp->ibqp.qp_num = qpn;
break;
}
spin_lock_init(&qp->state_lock);
spin_lock_init(&qp->sq.sq_lock);
spin_lock_init(&qp->rq.producer_lock);
spin_lock_init(&qp->rq.consumer_lock);
skb_queue_head_init(&qp->req_pkts);
skb_queue_head_init(&qp->resp_pkts);
atomic_set(&qp->ssn, 0);
atomic_set(&qp->skb_out, 0);
}
static int rxe_init_sq(struct rxe_qp *qp, struct ib_qp_init_attr *init,
struct ib_udata *udata,
struct rxe_create_qp_resp __user *uresp)
{
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
int wqe_size;
int err;
qp->sq.max_wr = init->cap.max_send_wr;
wqe_size = max_t(int, init->cap.max_send_sge * sizeof(struct ib_sge),
init->cap.max_inline_data);
qp->sq.max_sge = wqe_size / sizeof(struct ib_sge);
qp->sq.max_inline = wqe_size;
wqe_size += sizeof(struct rxe_send_wqe);
qp->sq.queue = rxe_queue_init(rxe, &qp->sq.max_wr, wqe_size,
QUEUE_TYPE_FROM_CLIENT);
if (!qp->sq.queue) {
rxe_err_qp(qp, "Unable to allocate send queue");
err = -ENOMEM;
goto err_out;
}
/* prepare info for caller to mmap send queue if user space qp */
err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata,
qp->sq.queue->buf, qp->sq.queue->buf_size,
&qp->sq.queue->ip);
if (err) {
rxe_err_qp(qp, "do_mmap_info failed, err = %d", err);
goto err_free;
}
/* return actual capabilities to caller which may be larger
* than requested
*/
init->cap.max_send_wr = qp->sq.max_wr;
init->cap.max_send_sge = qp->sq.max_sge;
init->cap.max_inline_data = qp->sq.max_inline;
return 0;
err_free:
vfree(qp->sq.queue->buf);
kfree(qp->sq.queue);
qp->sq.queue = NULL;
err_out:
return err;
}
static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
struct ib_qp_init_attr *init, struct ib_udata *udata,
struct rxe_create_qp_resp __user *uresp)
{
int err;
/* if we don't finish qp create make sure queue is valid */
skb_queue_head_init(&qp->req_pkts);
err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk);
if (err < 0)
return err;
qp->sk->sk->sk_user_data = qp;
/* pick a source UDP port number for this QP based on
* the source QPN. this spreads traffic for different QPs
* across different NIC RX queues (while using a single
* flow for a given QP to maintain packet order).
* the port number must be in the Dynamic Ports range
* (0xc000 - 0xffff).
*/
qp->src_port = RXE_ROCE_V2_SPORT + (hash_32(qp_num(qp), 14) & 0x3fff);
err = rxe_init_sq(qp, init, udata, uresp);
if (err)
return err;
qp->req.wqe_index = queue_get_producer(qp->sq.queue,
QUEUE_TYPE_FROM_CLIENT);
qp->req.opcode = -1;
qp->comp.opcode = -1;
rxe_init_task(&qp->req.task, qp, rxe_requester);
rxe_init_task(&qp->comp.task, qp, rxe_completer);
qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
if (init->qp_type == IB_QPT_RC) {
timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0);
timer_setup(&qp->retrans_timer, retransmit_timer, 0);
}
return 0;
}
static int rxe_init_rq(struct rxe_qp *qp, struct ib_qp_init_attr *init,
struct ib_udata *udata,
struct rxe_create_qp_resp __user *uresp)
{
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
int wqe_size;
int err;
qp->rq.max_wr = init->cap.max_recv_wr;
qp->rq.max_sge = init->cap.max_recv_sge;
wqe_size = sizeof(struct rxe_recv_wqe) +
qp->rq.max_sge*sizeof(struct ib_sge);
qp->rq.queue = rxe_queue_init(rxe, &qp->rq.max_wr, wqe_size,
QUEUE_TYPE_FROM_CLIENT);
if (!qp->rq.queue) {
rxe_err_qp(qp, "Unable to allocate recv queue");
err = -ENOMEM;
goto err_out;
}
/* prepare info for caller to mmap recv queue if user space qp */
err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata,
qp->rq.queue->buf, qp->rq.queue->buf_size,
&qp->rq.queue->ip);
if (err) {
rxe_err_qp(qp, "do_mmap_info failed, err = %d", err);
goto err_free;
}
/* return actual capabilities to caller which may be larger
* than requested
*/
init->cap.max_recv_wr = qp->rq.max_wr;
return 0;
err_free:
vfree(qp->rq.queue->buf);
kfree(qp->rq.queue);
qp->rq.queue = NULL;
err_out:
return err;
}
static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
struct ib_qp_init_attr *init,
struct ib_udata *udata,
struct rxe_create_qp_resp __user *uresp)
{
int err;
/* if we don't finish qp create make sure queue is valid */
skb_queue_head_init(&qp->resp_pkts);
if (!qp->srq) {
err = rxe_init_rq(qp, init, udata, uresp);
if (err)
return err;
}
rxe_init_task(&qp->resp.task, qp, rxe_responder);
qp->resp.opcode = OPCODE_NONE;
qp->resp.msn = 0;
return 0;
}
/* called by the create qp verb */
int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
struct ib_qp_init_attr *init,
struct rxe_create_qp_resp __user *uresp,
struct ib_pd *ibpd,
struct ib_udata *udata)
{
int err;
struct rxe_cq *rcq = to_rcq(init->recv_cq);
struct rxe_cq *scq = to_rcq(init->send_cq);
struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
unsigned long flags;
rxe_get(pd);
rxe_get(rcq);
rxe_get(scq);
if (srq)
rxe_get(srq);
qp->pd = pd;
qp->rcq = rcq;
qp->scq = scq;
qp->srq = srq;
atomic_inc(&rcq->num_wq);
atomic_inc(&scq->num_wq);
rxe_qp_init_misc(rxe, qp, init);
err = rxe_qp_init_req(rxe, qp, init, udata, uresp);
if (err)
goto err1;
err = rxe_qp_init_resp(rxe, qp, init, udata, uresp);
if (err)
goto err2;
spin_lock_irqsave(&qp->state_lock, flags);
qp->attr.qp_state = IB_QPS_RESET;
qp->valid = 1;
spin_unlock_irqrestore(&qp->state_lock, flags);
return 0;
err2:
rxe_queue_cleanup(qp->sq.queue);
qp->sq.queue = NULL;
err1:
atomic_dec(&rcq->num_wq);
atomic_dec(&scq->num_wq);
qp->pd = NULL;
qp->rcq = NULL;
qp->scq = NULL;
qp->srq = NULL;
if (srq)
rxe_put(srq);
rxe_put(scq);
rxe_put(rcq);
rxe_put(pd);
return err;
}
/* called by the query qp verb */
int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
{
init->event_handler = qp->ibqp.event_handler;
init->qp_context = qp->ibqp.qp_context;
init->send_cq = qp->ibqp.send_cq;
init->recv_cq = qp->ibqp.recv_cq;
init->srq = qp->ibqp.srq;
init->cap.max_send_wr = qp->sq.max_wr;
init->cap.max_send_sge = qp->sq.max_sge;
init->cap.max_inline_data = qp->sq.max_inline;
if (!qp->srq) {
init->cap.max_recv_wr = qp->rq.max_wr;
init->cap.max_recv_sge = qp->rq.max_sge;
}
init->sq_sig_type = qp->sq_sig_type;
init->qp_type = qp->ibqp.qp_type;
init->port_num = 1;
return 0;
}
int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
struct ib_qp_attr *attr, int mask)
{
if (mask & IB_QP_PORT) {
if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) {
rxe_dbg_qp(qp, "invalid port %d\n", attr->port_num);
goto err1;
}
}
if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
goto err1;
if (mask & IB_QP_ACCESS_FLAGS) {
if (!(qp_type(qp) == IB_QPT_RC || qp_type(qp) == IB_QPT_UC))
goto err1;
if (attr->qp_access_flags & ~RXE_ACCESS_SUPPORTED_QP)
goto err1;
}
if (mask & IB_QP_AV && rxe_av_chk_attr(qp, &attr->ah_attr))
goto err1;
if (mask & IB_QP_ALT_PATH) {
if (rxe_av_chk_attr(qp, &attr->alt_ah_attr))
goto err1;
if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num)) {
rxe_dbg_qp(qp, "invalid alt port %d\n", attr->alt_port_num);
goto err1;
}
if (attr->alt_timeout > 31) {
rxe_dbg_qp(qp, "invalid alt timeout %d > 31\n",
attr->alt_timeout);
goto err1;
}
}
if (mask & IB_QP_PATH_MTU) {
struct rxe_port *port = &rxe->port;
enum ib_mtu max_mtu = port->attr.max_mtu;
enum ib_mtu mtu = attr->path_mtu;
if (mtu > max_mtu) {
rxe_dbg_qp(qp, "invalid mtu (%d) > (%d)\n",
ib_mtu_enum_to_int(mtu),
ib_mtu_enum_to_int(max_mtu));
goto err1;
}
}
if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
rxe_dbg_qp(qp, "invalid max_rd_atomic %d > %d\n",
attr->max_rd_atomic,
rxe->attr.max_qp_rd_atom);
goto err1;
}
}
if (mask & IB_QP_TIMEOUT) {
if (attr->timeout > 31) {
rxe_dbg_qp(qp, "invalid timeout %d > 31\n",
attr->timeout);
goto err1;
}
}
return 0;
err1:
return -EINVAL;
}
/* move the qp to the reset state */
static void rxe_qp_reset(struct rxe_qp *qp)
{
/* stop tasks from running */
rxe_disable_task(&qp->resp.task);
rxe_disable_task(&qp->comp.task);
rxe_disable_task(&qp->req.task);
/* drain work and packet queuesc */
rxe_requester(qp);
rxe_completer(qp);
rxe_responder(qp);
if (qp->rq.queue)
rxe_queue_reset(qp->rq.queue);
if (qp->sq.queue)
rxe_queue_reset(qp->sq.queue);
/* cleanup attributes */
atomic_set(&qp->ssn, 0);
qp->req.opcode = -1;
qp->req.need_retry = 0;
qp->req.wait_for_rnr_timer = 0;
qp->req.noack_pkts = 0;
qp->resp.msn = 0;
qp->resp.opcode = -1;
qp->resp.drop_msg = 0;
qp->resp.goto_error = 0;
qp->resp.sent_psn_nak = 0;
if (qp->resp.mr) {
rxe_put(qp->resp.mr);
qp->resp.mr = NULL;
}
cleanup_rd_atomic_resources(qp);
/* reenable tasks */
rxe_enable_task(&qp->resp.task);
rxe_enable_task(&qp->comp.task);
rxe_enable_task(&qp->req.task);
}
/* move the qp to the error state */
void rxe_qp_error(struct rxe_qp *qp)
{
unsigned long flags;
spin_lock_irqsave(&qp->state_lock, flags);
qp->attr.qp_state = IB_QPS_ERR;
/* drain work and packet queues */
rxe_sched_task(&qp->resp.task);
rxe_sched_task(&qp->comp.task);
rxe_sched_task(&qp->req.task);
spin_unlock_irqrestore(&qp->state_lock, flags);
}
static void rxe_qp_sqd(struct rxe_qp *qp, struct ib_qp_attr *attr,
int mask)
{
unsigned long flags;
spin_lock_irqsave(&qp->state_lock, flags);
qp->attr.sq_draining = 1;
rxe_sched_task(&qp->comp.task);
rxe_sched_task(&qp->req.task);
spin_unlock_irqrestore(&qp->state_lock, flags);
}
/* caller should hold qp->state_lock */
static int __qp_chk_state(struct rxe_qp *qp, struct ib_qp_attr *attr,
int mask)
{
enum ib_qp_state cur_state;
enum ib_qp_state new_state;
cur_state = (mask & IB_QP_CUR_STATE) ?
attr->cur_qp_state : qp->attr.qp_state;
new_state = (mask & IB_QP_STATE) ?
attr->qp_state : cur_state;
if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask))
return -EINVAL;
if (mask & IB_QP_STATE && cur_state == IB_QPS_SQD) {
if (qp->attr.sq_draining && new_state != IB_QPS_ERR)
return -EINVAL;
}
return 0;
}
static const char *const qps2str[] = {
[IB_QPS_RESET] = "RESET",
[IB_QPS_INIT] = "INIT",
[IB_QPS_RTR] = "RTR",
[IB_QPS_RTS] = "RTS",
[IB_QPS_SQD] = "SQD",
[IB_QPS_SQE] = "SQE",
[IB_QPS_ERR] = "ERR",
};
/* called by the modify qp verb */
int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
struct ib_udata *udata)
{
int err;
if (mask & IB_QP_CUR_STATE)
qp->attr.cur_qp_state = attr->qp_state;
if (mask & IB_QP_STATE) {
unsigned long flags;
spin_lock_irqsave(&qp->state_lock, flags);
err = __qp_chk_state(qp, attr, mask);
if (!err) {
qp->attr.qp_state = attr->qp_state;
rxe_dbg_qp(qp, "state -> %s\n",
qps2str[attr->qp_state]);
}
spin_unlock_irqrestore(&qp->state_lock, flags);
if (err)
return err;
switch (attr->qp_state) {
case IB_QPS_RESET:
rxe_qp_reset(qp);
break;
case IB_QPS_SQD:
rxe_qp_sqd(qp, attr, mask);
break;
case IB_QPS_ERR:
rxe_qp_error(qp);
break;
default:
break;
}
}
if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
int max_rd_atomic = attr->max_rd_atomic ?
roundup_pow_of_two(attr->max_rd_atomic) : 0;
qp->attr.max_rd_atomic = max_rd_atomic;
atomic_set(&qp->req.rd_atomic, max_rd_atomic);
}
if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
int max_dest_rd_atomic = attr->max_dest_rd_atomic ?
roundup_pow_of_two(attr->max_dest_rd_atomic) : 0;
qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
free_rd_atomic_resources(qp);
err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
if (err)
return err;
}
if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
if (mask & IB_QP_ACCESS_FLAGS)
qp->attr.qp_access_flags = attr->qp_access_flags;
if (mask & IB_QP_PKEY_INDEX)
qp->attr.pkey_index = attr->pkey_index;
if (mask & IB_QP_PORT)
qp->attr.port_num = attr->port_num;
if (mask & IB_QP_QKEY)
qp->attr.qkey = attr->qkey;
if (mask & IB_QP_AV)
rxe_init_av(&attr->ah_attr, &qp->pri_av);
if (mask & IB_QP_ALT_PATH) {
rxe_init_av(&attr->alt_ah_attr, &qp->alt_av);
qp->attr.alt_port_num = attr->alt_port_num;
qp->attr.alt_pkey_index = attr->alt_pkey_index;
qp->attr.alt_timeout = attr->alt_timeout;
}
if (mask & IB_QP_PATH_MTU) {
qp->attr.path_mtu = attr->path_mtu;
qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
}
if (mask & IB_QP_TIMEOUT) {
qp->attr.timeout = attr->timeout;
if (attr->timeout == 0) {
qp->qp_timeout_jiffies = 0;
} else {
/* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
int j = nsecs_to_jiffies(4096ULL << attr->timeout);
qp->qp_timeout_jiffies = j ? j : 1;
}
}
if (mask & IB_QP_RETRY_CNT) {
qp->attr.retry_cnt = attr->retry_cnt;
qp->comp.retry_cnt = attr->retry_cnt;
rxe_dbg_qp(qp, "set retry count = %d\n", attr->retry_cnt);
}
if (mask & IB_QP_RNR_RETRY) {
qp->attr.rnr_retry = attr->rnr_retry;
qp->comp.rnr_retry = attr->rnr_retry;
rxe_dbg_qp(qp, "set rnr retry count = %d\n", attr->rnr_retry);
}
if (mask & IB_QP_RQ_PSN) {
qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
qp->resp.psn = qp->attr.rq_psn;
rxe_dbg_qp(qp, "set resp psn = 0x%x\n", qp->resp.psn);
}
if (mask & IB_QP_MIN_RNR_TIMER) {
qp->attr.min_rnr_timer = attr->min_rnr_timer;
rxe_dbg_qp(qp, "set min rnr timer = 0x%x\n",
attr->min_rnr_timer);
}
if (mask & IB_QP_SQ_PSN) {
qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
qp->req.psn = qp->attr.sq_psn;
qp->comp.psn = qp->attr.sq_psn;
rxe_dbg_qp(qp, "set req psn = 0x%x\n", qp->req.psn);
}
if (mask & IB_QP_PATH_MIG_STATE)
qp->attr.path_mig_state = attr->path_mig_state;
if (mask & IB_QP_DEST_QPN)
qp->attr.dest_qp_num = attr->dest_qp_num;
return 0;
}
/* called by the query qp verb */
int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
{
unsigned long flags;
*attr = qp->attr;
attr->rq_psn = qp->resp.psn;
attr->sq_psn = qp->req.psn;
attr->cap.max_send_wr = qp->sq.max_wr;
attr->cap.max_send_sge = qp->sq.max_sge;
attr->cap.max_inline_data = qp->sq.max_inline;
if (!qp->srq) {
attr->cap.max_recv_wr = qp->rq.max_wr;
attr->cap.max_recv_sge = qp->rq.max_sge;
}
rxe_av_to_attr(&qp->pri_av, &attr->ah_attr);
rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr);
/* Applications that get this state typically spin on it.
* Yield the processor
*/
spin_lock_irqsave(&qp->state_lock, flags);
if (qp->attr.sq_draining) {
spin_unlock_irqrestore(&qp->state_lock, flags);
cond_resched();
} else {
spin_unlock_irqrestore(&qp->state_lock, flags);
}
return 0;
}
int rxe_qp_chk_destroy(struct rxe_qp *qp)
{
/* See IBA o10-2.2.3
* An attempt to destroy a QP while attached to a mcast group
* will fail immediately.
*/
if (atomic_read(&qp->mcg_num)) {
rxe_dbg_qp(qp, "Attempt to destroy while attached to multicast group\n");
return -EBUSY;
}
return 0;
}
/* called when the last reference to the qp is dropped */
static void rxe_qp_do_cleanup(struct work_struct *work)
{
struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work);
unsigned long flags;
spin_lock_irqsave(&qp->state_lock, flags);
qp->valid = 0;
spin_unlock_irqrestore(&qp->state_lock, flags);
qp->qp_timeout_jiffies = 0;
if (qp_type(qp) == IB_QPT_RC) {
del_timer_sync(&qp->retrans_timer);
del_timer_sync(&qp->rnr_nak_timer);
}
if (qp->resp.task.func)
rxe_cleanup_task(&qp->resp.task);
if (qp->req.task.func)
rxe_cleanup_task(&qp->req.task);
if (qp->comp.task.func)
rxe_cleanup_task(&qp->comp.task);
/* flush out any receive wr's or pending requests */
rxe_requester(qp);
rxe_completer(qp);
rxe_responder(qp);
if (qp->sq.queue)
rxe_queue_cleanup(qp->sq.queue);
if (qp->srq)
rxe_put(qp->srq);
if (qp->rq.queue)
rxe_queue_cleanup(qp->rq.queue);
if (qp->scq) {
atomic_dec(&qp->scq->num_wq);
rxe_put(qp->scq);
}
if (qp->rcq) {
atomic_dec(&qp->rcq->num_wq);
rxe_put(qp->rcq);
}
if (qp->pd)
rxe_put(qp->pd);
if (qp->resp.mr)
rxe_put(qp->resp.mr);
free_rd_atomic_resources(qp);
if (qp->sk) {
if (qp_type(qp) == IB_QPT_RC)
sk_dst_reset(qp->sk->sk);
kernel_sock_shutdown(qp->sk, SHUT_RDWR);
sock_release(qp->sk);
}
}
/* called when the last reference to the qp is dropped */
void rxe_qp_cleanup(struct rxe_pool_elem *elem)
{
struct rxe_qp *qp = container_of(elem, typeof(*qp), elem);
execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work);
}
| linux-master | drivers/infiniband/sw/rxe/rxe_qp.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include <linux/skbuff.h>
#include "rxe.h"
#include "rxe_loc.h"
#include "rxe_queue.h"
#include "rxe_task.h"
enum comp_state {
COMPST_GET_ACK,
COMPST_GET_WQE,
COMPST_COMP_WQE,
COMPST_COMP_ACK,
COMPST_CHECK_PSN,
COMPST_CHECK_ACK,
COMPST_READ,
COMPST_ATOMIC,
COMPST_WRITE_SEND,
COMPST_UPDATE_COMP,
COMPST_ERROR_RETRY,
COMPST_RNR_RETRY,
COMPST_ERROR,
COMPST_EXIT, /* We have an issue, and we want to rerun the completer */
COMPST_DONE, /* The completer finished successflly */
};
static char *comp_state_name[] = {
[COMPST_GET_ACK] = "GET ACK",
[COMPST_GET_WQE] = "GET WQE",
[COMPST_COMP_WQE] = "COMP WQE",
[COMPST_COMP_ACK] = "COMP ACK",
[COMPST_CHECK_PSN] = "CHECK PSN",
[COMPST_CHECK_ACK] = "CHECK ACK",
[COMPST_READ] = "READ",
[COMPST_ATOMIC] = "ATOMIC",
[COMPST_WRITE_SEND] = "WRITE/SEND",
[COMPST_UPDATE_COMP] = "UPDATE COMP",
[COMPST_ERROR_RETRY] = "ERROR RETRY",
[COMPST_RNR_RETRY] = "RNR RETRY",
[COMPST_ERROR] = "ERROR",
[COMPST_EXIT] = "EXIT",
[COMPST_DONE] = "DONE",
};
static unsigned long rnrnak_usec[32] = {
[IB_RNR_TIMER_655_36] = 655360,
[IB_RNR_TIMER_000_01] = 10,
[IB_RNR_TIMER_000_02] = 20,
[IB_RNR_TIMER_000_03] = 30,
[IB_RNR_TIMER_000_04] = 40,
[IB_RNR_TIMER_000_06] = 60,
[IB_RNR_TIMER_000_08] = 80,
[IB_RNR_TIMER_000_12] = 120,
[IB_RNR_TIMER_000_16] = 160,
[IB_RNR_TIMER_000_24] = 240,
[IB_RNR_TIMER_000_32] = 320,
[IB_RNR_TIMER_000_48] = 480,
[IB_RNR_TIMER_000_64] = 640,
[IB_RNR_TIMER_000_96] = 960,
[IB_RNR_TIMER_001_28] = 1280,
[IB_RNR_TIMER_001_92] = 1920,
[IB_RNR_TIMER_002_56] = 2560,
[IB_RNR_TIMER_003_84] = 3840,
[IB_RNR_TIMER_005_12] = 5120,
[IB_RNR_TIMER_007_68] = 7680,
[IB_RNR_TIMER_010_24] = 10240,
[IB_RNR_TIMER_015_36] = 15360,
[IB_RNR_TIMER_020_48] = 20480,
[IB_RNR_TIMER_030_72] = 30720,
[IB_RNR_TIMER_040_96] = 40960,
[IB_RNR_TIMER_061_44] = 61410,
[IB_RNR_TIMER_081_92] = 81920,
[IB_RNR_TIMER_122_88] = 122880,
[IB_RNR_TIMER_163_84] = 163840,
[IB_RNR_TIMER_245_76] = 245760,
[IB_RNR_TIMER_327_68] = 327680,
[IB_RNR_TIMER_491_52] = 491520,
};
static inline unsigned long rnrnak_jiffies(u8 timeout)
{
return max_t(unsigned long,
usecs_to_jiffies(rnrnak_usec[timeout]), 1);
}
static enum ib_wc_opcode wr_to_wc_opcode(enum ib_wr_opcode opcode)
{
switch (opcode) {
case IB_WR_RDMA_WRITE: return IB_WC_RDMA_WRITE;
case IB_WR_RDMA_WRITE_WITH_IMM: return IB_WC_RDMA_WRITE;
case IB_WR_SEND: return IB_WC_SEND;
case IB_WR_SEND_WITH_IMM: return IB_WC_SEND;
case IB_WR_RDMA_READ: return IB_WC_RDMA_READ;
case IB_WR_ATOMIC_CMP_AND_SWP: return IB_WC_COMP_SWAP;
case IB_WR_ATOMIC_FETCH_AND_ADD: return IB_WC_FETCH_ADD;
case IB_WR_LSO: return IB_WC_LSO;
case IB_WR_SEND_WITH_INV: return IB_WC_SEND;
case IB_WR_RDMA_READ_WITH_INV: return IB_WC_RDMA_READ;
case IB_WR_LOCAL_INV: return IB_WC_LOCAL_INV;
case IB_WR_REG_MR: return IB_WC_REG_MR;
case IB_WR_BIND_MW: return IB_WC_BIND_MW;
case IB_WR_ATOMIC_WRITE: return IB_WC_ATOMIC_WRITE;
case IB_WR_FLUSH: return IB_WC_FLUSH;
default:
return 0xff;
}
}
void retransmit_timer(struct timer_list *t)
{
struct rxe_qp *qp = from_timer(qp, t, retrans_timer);
unsigned long flags;
rxe_dbg_qp(qp, "retransmit timer fired\n");
spin_lock_irqsave(&qp->state_lock, flags);
if (qp->valid) {
qp->comp.timeout = 1;
rxe_sched_task(&qp->comp.task);
}
spin_unlock_irqrestore(&qp->state_lock, flags);
}
void rxe_comp_queue_pkt(struct rxe_qp *qp, struct sk_buff *skb)
{
int must_sched;
skb_queue_tail(&qp->resp_pkts, skb);
must_sched = skb_queue_len(&qp->resp_pkts) > 1;
if (must_sched != 0)
rxe_counter_inc(SKB_TO_PKT(skb)->rxe, RXE_CNT_COMPLETER_SCHED);
if (must_sched)
rxe_sched_task(&qp->comp.task);
else
rxe_run_task(&qp->comp.task);
}
static inline enum comp_state get_wqe(struct rxe_qp *qp,
struct rxe_pkt_info *pkt,
struct rxe_send_wqe **wqe_p)
{
struct rxe_send_wqe *wqe;
/* we come here whether or not we found a response packet to see if
* there are any posted WQEs
*/
wqe = queue_head(qp->sq.queue, QUEUE_TYPE_FROM_CLIENT);
*wqe_p = wqe;
/* no WQE or requester has not started it yet */
if (!wqe || wqe->state == wqe_state_posted)
return pkt ? COMPST_DONE : COMPST_EXIT;
/* WQE does not require an ack */
if (wqe->state == wqe_state_done)
return COMPST_COMP_WQE;
/* WQE caused an error */
if (wqe->state == wqe_state_error)
return COMPST_ERROR;
/* we have a WQE, if we also have an ack check its PSN */
return pkt ? COMPST_CHECK_PSN : COMPST_EXIT;
}
static inline void reset_retry_counters(struct rxe_qp *qp)
{
qp->comp.retry_cnt = qp->attr.retry_cnt;
qp->comp.rnr_retry = qp->attr.rnr_retry;
qp->comp.started_retry = 0;
}
static inline enum comp_state check_psn(struct rxe_qp *qp,
struct rxe_pkt_info *pkt,
struct rxe_send_wqe *wqe)
{
s32 diff;
/* check to see if response is past the oldest WQE. if it is, complete
* send/write or error read/atomic
*/
diff = psn_compare(pkt->psn, wqe->last_psn);
if (diff > 0) {
if (wqe->state == wqe_state_pending) {
if (wqe->mask & WR_ATOMIC_OR_READ_MASK)
return COMPST_ERROR_RETRY;
reset_retry_counters(qp);
return COMPST_COMP_WQE;
} else {
return COMPST_DONE;
}
}
/* compare response packet to expected response */
diff = psn_compare(pkt->psn, qp->comp.psn);
if (diff < 0) {
/* response is most likely a retried packet if it matches an
* uncompleted WQE go complete it else ignore it
*/
if (pkt->psn == wqe->last_psn)
return COMPST_COMP_ACK;
else if (pkt->opcode == IB_OPCODE_RC_ACKNOWLEDGE &&
(qp->comp.opcode == IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST ||
qp->comp.opcode == IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE))
return COMPST_CHECK_ACK;
else
return COMPST_DONE;
} else if ((diff > 0) && (wqe->mask & WR_ATOMIC_OR_READ_MASK)) {
return COMPST_DONE;
} else {
return COMPST_CHECK_ACK;
}
}
static inline enum comp_state check_ack(struct rxe_qp *qp,
struct rxe_pkt_info *pkt,
struct rxe_send_wqe *wqe)
{
unsigned int mask = pkt->mask;
u8 syn;
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
/* Check the sequence only */
switch (qp->comp.opcode) {
case -1:
/* Will catch all *_ONLY cases. */
if (!(mask & RXE_START_MASK))
return COMPST_ERROR;
break;
case IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST:
case IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE:
/* Check NAK code to handle a remote error */
if (pkt->opcode == IB_OPCODE_RC_ACKNOWLEDGE)
break;
if (pkt->opcode != IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE &&
pkt->opcode != IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST) {
/* read retries of partial data may restart from
* read response first or response only.
*/
if ((pkt->psn == wqe->first_psn &&
pkt->opcode ==
IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST) ||
(wqe->first_psn == wqe->last_psn &&
pkt->opcode ==
IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY))
break;
return COMPST_ERROR;
}
break;
default:
WARN_ON_ONCE(1);
}
/* Check operation validity. */
switch (pkt->opcode) {
case IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST:
case IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST:
case IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY:
syn = aeth_syn(pkt);
if ((syn & AETH_TYPE_MASK) != AETH_ACK)
return COMPST_ERROR;
if (wqe->wr.opcode == IB_WR_ATOMIC_WRITE)
return COMPST_WRITE_SEND;
fallthrough;
/* (IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE doesn't have an AETH)
*/
case IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE:
if (wqe->wr.opcode != IB_WR_RDMA_READ &&
wqe->wr.opcode != IB_WR_RDMA_READ_WITH_INV &&
wqe->wr.opcode != IB_WR_FLUSH) {
wqe->status = IB_WC_FATAL_ERR;
return COMPST_ERROR;
}
reset_retry_counters(qp);
return COMPST_READ;
case IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE:
syn = aeth_syn(pkt);
if ((syn & AETH_TYPE_MASK) != AETH_ACK)
return COMPST_ERROR;
if (wqe->wr.opcode != IB_WR_ATOMIC_CMP_AND_SWP &&
wqe->wr.opcode != IB_WR_ATOMIC_FETCH_AND_ADD)
return COMPST_ERROR;
reset_retry_counters(qp);
return COMPST_ATOMIC;
case IB_OPCODE_RC_ACKNOWLEDGE:
syn = aeth_syn(pkt);
switch (syn & AETH_TYPE_MASK) {
case AETH_ACK:
reset_retry_counters(qp);
return COMPST_WRITE_SEND;
case AETH_RNR_NAK:
rxe_counter_inc(rxe, RXE_CNT_RCV_RNR);
return COMPST_RNR_RETRY;
case AETH_NAK:
switch (syn) {
case AETH_NAK_PSN_SEQ_ERROR:
/* a nak implicitly acks all packets with psns
* before
*/
if (psn_compare(pkt->psn, qp->comp.psn) > 0) {
rxe_counter_inc(rxe,
RXE_CNT_RCV_SEQ_ERR);
qp->comp.psn = pkt->psn;
if (qp->req.wait_psn) {
qp->req.wait_psn = 0;
rxe_sched_task(&qp->req.task);
}
}
return COMPST_ERROR_RETRY;
case AETH_NAK_INVALID_REQ:
wqe->status = IB_WC_REM_INV_REQ_ERR;
return COMPST_ERROR;
case AETH_NAK_REM_ACC_ERR:
wqe->status = IB_WC_REM_ACCESS_ERR;
return COMPST_ERROR;
case AETH_NAK_REM_OP_ERR:
wqe->status = IB_WC_REM_OP_ERR;
return COMPST_ERROR;
default:
rxe_dbg_qp(qp, "unexpected nak %x\n", syn);
wqe->status = IB_WC_REM_OP_ERR;
return COMPST_ERROR;
}
default:
return COMPST_ERROR;
}
break;
default:
rxe_dbg_qp(qp, "unexpected opcode\n");
}
return COMPST_ERROR;
}
static inline enum comp_state do_read(struct rxe_qp *qp,
struct rxe_pkt_info *pkt,
struct rxe_send_wqe *wqe)
{
int ret;
ret = copy_data(qp->pd, IB_ACCESS_LOCAL_WRITE,
&wqe->dma, payload_addr(pkt),
payload_size(pkt), RXE_TO_MR_OBJ);
if (ret) {
wqe->status = IB_WC_LOC_PROT_ERR;
return COMPST_ERROR;
}
if (wqe->dma.resid == 0 && (pkt->mask & RXE_END_MASK))
return COMPST_COMP_ACK;
return COMPST_UPDATE_COMP;
}
static inline enum comp_state do_atomic(struct rxe_qp *qp,
struct rxe_pkt_info *pkt,
struct rxe_send_wqe *wqe)
{
int ret;
u64 atomic_orig = atmack_orig(pkt);
ret = copy_data(qp->pd, IB_ACCESS_LOCAL_WRITE,
&wqe->dma, &atomic_orig,
sizeof(u64), RXE_TO_MR_OBJ);
if (ret) {
wqe->status = IB_WC_LOC_PROT_ERR;
return COMPST_ERROR;
}
return COMPST_COMP_ACK;
}
static void make_send_cqe(struct rxe_qp *qp, struct rxe_send_wqe *wqe,
struct rxe_cqe *cqe)
{
struct ib_wc *wc = &cqe->ibwc;
struct ib_uverbs_wc *uwc = &cqe->uibwc;
memset(cqe, 0, sizeof(*cqe));
if (!qp->is_user) {
wc->wr_id = wqe->wr.wr_id;
wc->status = wqe->status;
wc->qp = &qp->ibqp;
} else {
uwc->wr_id = wqe->wr.wr_id;
uwc->status = wqe->status;
uwc->qp_num = qp->ibqp.qp_num;
}
if (wqe->status == IB_WC_SUCCESS) {
if (!qp->is_user) {
wc->opcode = wr_to_wc_opcode(wqe->wr.opcode);
if (wqe->wr.opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
wqe->wr.opcode == IB_WR_SEND_WITH_IMM)
wc->wc_flags = IB_WC_WITH_IMM;
wc->byte_len = wqe->dma.length;
} else {
uwc->opcode = wr_to_wc_opcode(wqe->wr.opcode);
if (wqe->wr.opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
wqe->wr.opcode == IB_WR_SEND_WITH_IMM)
uwc->wc_flags = IB_WC_WITH_IMM;
uwc->byte_len = wqe->dma.length;
}
} else {
if (wqe->status != IB_WC_WR_FLUSH_ERR)
rxe_err_qp(qp, "non-flush error status = %d",
wqe->status);
}
}
/*
* IBA Spec. Section 10.7.3.1 SIGNALED COMPLETIONS
* ---------8<---------8<-------------
* ...Note that if a completion error occurs, a Work Completion
* will always be generated, even if the signaling
* indicator requests an Unsignaled Completion.
* ---------8<---------8<-------------
*/
static void do_complete(struct rxe_qp *qp, struct rxe_send_wqe *wqe)
{
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
struct rxe_cqe cqe;
bool post;
/* do we need to post a completion */
post = ((qp->sq_sig_type == IB_SIGNAL_ALL_WR) ||
(wqe->wr.send_flags & IB_SEND_SIGNALED) ||
wqe->status != IB_WC_SUCCESS);
if (post)
make_send_cqe(qp, wqe, &cqe);
queue_advance_consumer(qp->sq.queue, QUEUE_TYPE_FROM_CLIENT);
if (post)
rxe_cq_post(qp->scq, &cqe, 0);
if (wqe->wr.opcode == IB_WR_SEND ||
wqe->wr.opcode == IB_WR_SEND_WITH_IMM ||
wqe->wr.opcode == IB_WR_SEND_WITH_INV)
rxe_counter_inc(rxe, RXE_CNT_RDMA_SEND);
/*
* we completed something so let req run again
* if it is trying to fence
*/
if (qp->req.wait_fence) {
qp->req.wait_fence = 0;
rxe_sched_task(&qp->req.task);
}
}
static void comp_check_sq_drain_done(struct rxe_qp *qp)
{
unsigned long flags;
spin_lock_irqsave(&qp->state_lock, flags);
if (unlikely(qp_state(qp) == IB_QPS_SQD)) {
if (qp->attr.sq_draining && qp->comp.psn == qp->req.psn) {
qp->attr.sq_draining = 0;
spin_unlock_irqrestore(&qp->state_lock, flags);
if (qp->ibqp.event_handler) {
struct ib_event ev;
ev.device = qp->ibqp.device;
ev.element.qp = &qp->ibqp;
ev.event = IB_EVENT_SQ_DRAINED;
qp->ibqp.event_handler(&ev,
qp->ibqp.qp_context);
}
return;
}
}
spin_unlock_irqrestore(&qp->state_lock, flags);
}
static inline enum comp_state complete_ack(struct rxe_qp *qp,
struct rxe_pkt_info *pkt,
struct rxe_send_wqe *wqe)
{
if (wqe->has_rd_atomic) {
wqe->has_rd_atomic = 0;
atomic_inc(&qp->req.rd_atomic);
if (qp->req.need_rd_atomic) {
qp->comp.timeout_retry = 0;
qp->req.need_rd_atomic = 0;
rxe_sched_task(&qp->req.task);
}
}
comp_check_sq_drain_done(qp);
do_complete(qp, wqe);
if (psn_compare(pkt->psn, qp->comp.psn) >= 0)
return COMPST_UPDATE_COMP;
else
return COMPST_DONE;
}
static inline enum comp_state complete_wqe(struct rxe_qp *qp,
struct rxe_pkt_info *pkt,
struct rxe_send_wqe *wqe)
{
if (pkt && wqe->state == wqe_state_pending) {
if (psn_compare(wqe->last_psn, qp->comp.psn) >= 0) {
qp->comp.psn = (wqe->last_psn + 1) & BTH_PSN_MASK;
qp->comp.opcode = -1;
}
if (qp->req.wait_psn) {
qp->req.wait_psn = 0;
rxe_sched_task(&qp->req.task);
}
}
do_complete(qp, wqe);
return COMPST_GET_WQE;
}
/* drain incoming response packet queue */
static void drain_resp_pkts(struct rxe_qp *qp)
{
struct sk_buff *skb;
while ((skb = skb_dequeue(&qp->resp_pkts))) {
rxe_put(qp);
kfree_skb(skb);
ib_device_put(qp->ibqp.device);
}
}
/* complete send wqe with flush error */
static int flush_send_wqe(struct rxe_qp *qp, struct rxe_send_wqe *wqe)
{
struct rxe_cqe cqe = {};
struct ib_wc *wc = &cqe.ibwc;
struct ib_uverbs_wc *uwc = &cqe.uibwc;
int err;
if (qp->is_user) {
uwc->wr_id = wqe->wr.wr_id;
uwc->status = IB_WC_WR_FLUSH_ERR;
uwc->qp_num = qp->ibqp.qp_num;
} else {
wc->wr_id = wqe->wr.wr_id;
wc->status = IB_WC_WR_FLUSH_ERR;
wc->qp = &qp->ibqp;
}
err = rxe_cq_post(qp->scq, &cqe, 0);
if (err)
rxe_dbg_cq(qp->scq, "post cq failed, err = %d", err);
return err;
}
/* drain and optionally complete the send queue
* if unable to complete a wqe, i.e. cq is full, stop
* completing and flush the remaining wqes
*/
static void flush_send_queue(struct rxe_qp *qp, bool notify)
{
struct rxe_send_wqe *wqe;
struct rxe_queue *q = qp->sq.queue;
int err;
/* send queue never got created. nothing to do. */
if (!qp->sq.queue)
return;
while ((wqe = queue_head(q, q->type))) {
if (notify) {
err = flush_send_wqe(qp, wqe);
if (err)
notify = 0;
}
queue_advance_consumer(q, q->type);
}
}
static void free_pkt(struct rxe_pkt_info *pkt)
{
struct sk_buff *skb = PKT_TO_SKB(pkt);
struct rxe_qp *qp = pkt->qp;
struct ib_device *dev = qp->ibqp.device;
kfree_skb(skb);
rxe_put(qp);
ib_device_put(dev);
}
/* reset the retry timer if
* - QP is type RC
* - there is a packet sent by the requester that
* might be acked (we still might get spurious
* timeouts but try to keep them as few as possible)
* - the timeout parameter is set
* - the QP is alive
*/
static void reset_retry_timer(struct rxe_qp *qp)
{
unsigned long flags;
if (qp_type(qp) == IB_QPT_RC && qp->qp_timeout_jiffies) {
spin_lock_irqsave(&qp->state_lock, flags);
if (qp_state(qp) >= IB_QPS_RTS &&
psn_compare(qp->req.psn, qp->comp.psn) > 0)
mod_timer(&qp->retrans_timer,
jiffies + qp->qp_timeout_jiffies);
spin_unlock_irqrestore(&qp->state_lock, flags);
}
}
int rxe_completer(struct rxe_qp *qp)
{
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
struct rxe_send_wqe *wqe = NULL;
struct sk_buff *skb = NULL;
struct rxe_pkt_info *pkt = NULL;
enum comp_state state;
int ret;
unsigned long flags;
spin_lock_irqsave(&qp->state_lock, flags);
if (!qp->valid || qp_state(qp) == IB_QPS_ERR ||
qp_state(qp) == IB_QPS_RESET) {
bool notify = qp->valid && (qp_state(qp) == IB_QPS_ERR);
drain_resp_pkts(qp);
flush_send_queue(qp, notify);
spin_unlock_irqrestore(&qp->state_lock, flags);
goto exit;
}
spin_unlock_irqrestore(&qp->state_lock, flags);
if (qp->comp.timeout) {
qp->comp.timeout_retry = 1;
qp->comp.timeout = 0;
} else {
qp->comp.timeout_retry = 0;
}
if (qp->req.need_retry)
goto exit;
state = COMPST_GET_ACK;
while (1) {
rxe_dbg_qp(qp, "state = %s\n", comp_state_name[state]);
switch (state) {
case COMPST_GET_ACK:
skb = skb_dequeue(&qp->resp_pkts);
if (skb) {
pkt = SKB_TO_PKT(skb);
qp->comp.timeout_retry = 0;
}
state = COMPST_GET_WQE;
break;
case COMPST_GET_WQE:
state = get_wqe(qp, pkt, &wqe);
break;
case COMPST_CHECK_PSN:
state = check_psn(qp, pkt, wqe);
break;
case COMPST_CHECK_ACK:
state = check_ack(qp, pkt, wqe);
break;
case COMPST_READ:
state = do_read(qp, pkt, wqe);
break;
case COMPST_ATOMIC:
state = do_atomic(qp, pkt, wqe);
break;
case COMPST_WRITE_SEND:
if (wqe->state == wqe_state_pending &&
wqe->last_psn == pkt->psn)
state = COMPST_COMP_ACK;
else
state = COMPST_UPDATE_COMP;
break;
case COMPST_COMP_ACK:
state = complete_ack(qp, pkt, wqe);
break;
case COMPST_COMP_WQE:
state = complete_wqe(qp, pkt, wqe);
break;
case COMPST_UPDATE_COMP:
if (pkt->mask & RXE_END_MASK)
qp->comp.opcode = -1;
else
qp->comp.opcode = pkt->opcode;
if (psn_compare(pkt->psn, qp->comp.psn) >= 0)
qp->comp.psn = (pkt->psn + 1) & BTH_PSN_MASK;
if (qp->req.wait_psn) {
qp->req.wait_psn = 0;
rxe_sched_task(&qp->req.task);
}
state = COMPST_DONE;
break;
case COMPST_DONE:
goto done;
case COMPST_EXIT:
if (qp->comp.timeout_retry && wqe) {
state = COMPST_ERROR_RETRY;
break;
}
reset_retry_timer(qp);
goto exit;
case COMPST_ERROR_RETRY:
/* we come here if the retry timer fired and we did
* not receive a response packet. try to retry the send
* queue if that makes sense and the limits have not
* been exceeded. remember that some timeouts are
* spurious since we do not reset the timer but kick
* it down the road or let it expire
*/
/* there is nothing to retry in this case */
if (!wqe || (wqe->state == wqe_state_posted))
goto exit;
/* if we've started a retry, don't start another
* retry sequence, unless this is a timeout.
*/
if (qp->comp.started_retry &&
!qp->comp.timeout_retry)
goto done;
if (qp->comp.retry_cnt > 0) {
if (qp->comp.retry_cnt != 7)
qp->comp.retry_cnt--;
/* no point in retrying if we have already
* seen the last ack that the requester could
* have caused
*/
if (psn_compare(qp->req.psn,
qp->comp.psn) > 0) {
/* tell the requester to retry the
* send queue next time around
*/
rxe_counter_inc(rxe,
RXE_CNT_COMP_RETRY);
qp->req.need_retry = 1;
qp->comp.started_retry = 1;
rxe_sched_task(&qp->req.task);
}
goto done;
} else {
rxe_counter_inc(rxe, RXE_CNT_RETRY_EXCEEDED);
wqe->status = IB_WC_RETRY_EXC_ERR;
state = COMPST_ERROR;
}
break;
case COMPST_RNR_RETRY:
/* we come here if we received an RNR NAK */
if (qp->comp.rnr_retry > 0) {
if (qp->comp.rnr_retry != 7)
qp->comp.rnr_retry--;
/* don't start a retry flow until the
* rnr timer has fired
*/
qp->req.wait_for_rnr_timer = 1;
rxe_dbg_qp(qp, "set rnr nak timer\n");
// TODO who protects from destroy_qp??
mod_timer(&qp->rnr_nak_timer,
jiffies + rnrnak_jiffies(aeth_syn(pkt)
& ~AETH_TYPE_MASK));
goto exit;
} else {
rxe_counter_inc(rxe,
RXE_CNT_RNR_RETRY_EXCEEDED);
wqe->status = IB_WC_RNR_RETRY_EXC_ERR;
state = COMPST_ERROR;
}
break;
case COMPST_ERROR:
WARN_ON_ONCE(wqe->status == IB_WC_SUCCESS);
do_complete(qp, wqe);
rxe_qp_error(qp);
goto exit;
}
}
/* A non-zero return value will cause rxe_do_task to
* exit its loop and end the work item. A zero return
* will continue looping and return to rxe_completer
*/
done:
ret = 0;
goto out;
exit:
ret = -EAGAIN;
out:
if (pkt)
free_pkt(pkt);
return ret;
}
| linux-master | drivers/infiniband/sw/rxe/rxe_comp.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include <rdma/ib_pack.h>
#include "rxe_opcode.h"
#include "rxe_hdr.h"
/* useful information about work request opcodes and pkt opcodes in
* table form
*/
struct rxe_wr_opcode_info rxe_wr_opcode_info[] = {
[IB_WR_RDMA_WRITE] = {
.name = "IB_WR_RDMA_WRITE",
.mask = {
[IB_QPT_RC] = WR_INLINE_MASK | WR_WRITE_MASK,
[IB_QPT_UC] = WR_INLINE_MASK | WR_WRITE_MASK,
},
},
[IB_WR_RDMA_WRITE_WITH_IMM] = {
.name = "IB_WR_RDMA_WRITE_WITH_IMM",
.mask = {
[IB_QPT_RC] = WR_INLINE_MASK | WR_WRITE_MASK,
[IB_QPT_UC] = WR_INLINE_MASK | WR_WRITE_MASK,
},
},
[IB_WR_SEND] = {
.name = "IB_WR_SEND",
.mask = {
[IB_QPT_GSI] = WR_INLINE_MASK | WR_SEND_MASK,
[IB_QPT_RC] = WR_INLINE_MASK | WR_SEND_MASK,
[IB_QPT_UC] = WR_INLINE_MASK | WR_SEND_MASK,
[IB_QPT_UD] = WR_INLINE_MASK | WR_SEND_MASK,
},
},
[IB_WR_SEND_WITH_IMM] = {
.name = "IB_WR_SEND_WITH_IMM",
.mask = {
[IB_QPT_GSI] = WR_INLINE_MASK | WR_SEND_MASK,
[IB_QPT_RC] = WR_INLINE_MASK | WR_SEND_MASK,
[IB_QPT_UC] = WR_INLINE_MASK | WR_SEND_MASK,
[IB_QPT_UD] = WR_INLINE_MASK | WR_SEND_MASK,
},
},
[IB_WR_RDMA_READ] = {
.name = "IB_WR_RDMA_READ",
.mask = {
[IB_QPT_RC] = WR_READ_MASK,
},
},
[IB_WR_ATOMIC_CMP_AND_SWP] = {
.name = "IB_WR_ATOMIC_CMP_AND_SWP",
.mask = {
[IB_QPT_RC] = WR_ATOMIC_MASK,
},
},
[IB_WR_ATOMIC_FETCH_AND_ADD] = {
.name = "IB_WR_ATOMIC_FETCH_AND_ADD",
.mask = {
[IB_QPT_RC] = WR_ATOMIC_MASK,
},
},
[IB_WR_LSO] = {
.name = "IB_WR_LSO",
.mask = {
/* not supported */
},
},
[IB_WR_SEND_WITH_INV] = {
.name = "IB_WR_SEND_WITH_INV",
.mask = {
[IB_QPT_RC] = WR_INLINE_MASK | WR_SEND_MASK,
[IB_QPT_UC] = WR_INLINE_MASK | WR_SEND_MASK,
[IB_QPT_UD] = WR_INLINE_MASK | WR_SEND_MASK,
},
},
[IB_WR_RDMA_READ_WITH_INV] = {
.name = "IB_WR_RDMA_READ_WITH_INV",
.mask = {
[IB_QPT_RC] = WR_READ_MASK,
},
},
[IB_WR_LOCAL_INV] = {
.name = "IB_WR_LOCAL_INV",
.mask = {
[IB_QPT_RC] = WR_LOCAL_OP_MASK,
},
},
[IB_WR_REG_MR] = {
.name = "IB_WR_REG_MR",
.mask = {
[IB_QPT_RC] = WR_LOCAL_OP_MASK,
},
},
[IB_WR_BIND_MW] = {
.name = "IB_WR_BIND_MW",
.mask = {
[IB_QPT_RC] = WR_LOCAL_OP_MASK,
[IB_QPT_UC] = WR_LOCAL_OP_MASK,
},
},
[IB_WR_FLUSH] = {
.name = "IB_WR_FLUSH",
.mask = {
[IB_QPT_RC] = WR_FLUSH_MASK,
},
},
[IB_WR_ATOMIC_WRITE] = {
.name = "IB_WR_ATOMIC_WRITE",
.mask = {
[IB_QPT_RC] = WR_ATOMIC_WRITE_MASK,
},
},
};
struct rxe_opcode_info rxe_opcode[RXE_NUM_OPCODE] = {
[IB_OPCODE_RC_SEND_FIRST] = {
.name = "IB_OPCODE_RC_SEND_FIRST",
.mask = RXE_PAYLOAD_MASK | RXE_REQ_MASK | RXE_RWR_MASK |
RXE_SEND_MASK | RXE_START_MASK,
.length = RXE_BTH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_PAYLOAD] = RXE_BTH_BYTES,
}
},
[IB_OPCODE_RC_SEND_MIDDLE] = {
.name = "IB_OPCODE_RC_SEND_MIDDLE",
.mask = RXE_PAYLOAD_MASK | RXE_REQ_MASK | RXE_SEND_MASK |
RXE_MIDDLE_MASK,
.length = RXE_BTH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_PAYLOAD] = RXE_BTH_BYTES,
}
},
[IB_OPCODE_RC_SEND_LAST] = {
.name = "IB_OPCODE_RC_SEND_LAST",
.mask = RXE_PAYLOAD_MASK | RXE_REQ_MASK | RXE_COMP_MASK |
RXE_SEND_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_PAYLOAD] = RXE_BTH_BYTES,
}
},
[IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE] = {
.name = "IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE",
.mask = RXE_IMMDT_MASK | RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_COMP_MASK | RXE_SEND_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_IMMDT_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_IMMDT] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_IMMDT_BYTES,
}
},
[IB_OPCODE_RC_SEND_ONLY] = {
.name = "IB_OPCODE_RC_SEND_ONLY",
.mask = RXE_PAYLOAD_MASK | RXE_REQ_MASK | RXE_COMP_MASK |
RXE_RWR_MASK | RXE_SEND_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_PAYLOAD] = RXE_BTH_BYTES,
}
},
[IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE] = {
.name = "IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE",
.mask = RXE_IMMDT_MASK | RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_COMP_MASK | RXE_RWR_MASK | RXE_SEND_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_IMMDT_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_IMMDT] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_IMMDT_BYTES,
}
},
[IB_OPCODE_RC_RDMA_WRITE_FIRST] = {
.name = "IB_OPCODE_RC_RDMA_WRITE_FIRST",
.mask = RXE_RETH_MASK | RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_WRITE_MASK | RXE_START_MASK,
.length = RXE_BTH_BYTES + RXE_RETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RETH_BYTES,
}
},
[IB_OPCODE_RC_RDMA_WRITE_MIDDLE] = {
.name = "IB_OPCODE_RC_RDMA_WRITE_MIDDLE",
.mask = RXE_PAYLOAD_MASK | RXE_REQ_MASK | RXE_WRITE_MASK |
RXE_MIDDLE_MASK,
.length = RXE_BTH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_PAYLOAD] = RXE_BTH_BYTES,
}
},
[IB_OPCODE_RC_RDMA_WRITE_LAST] = {
.name = "IB_OPCODE_RC_RDMA_WRITE_LAST",
.mask = RXE_PAYLOAD_MASK | RXE_REQ_MASK | RXE_WRITE_MASK |
RXE_END_MASK,
.length = RXE_BTH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_PAYLOAD] = RXE_BTH_BYTES,
}
},
[IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = {
.name = "IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE",
.mask = RXE_IMMDT_MASK | RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_WRITE_MASK | RXE_COMP_MASK | RXE_RWR_MASK |
RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_IMMDT_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_IMMDT] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_IMMDT_BYTES,
}
},
[IB_OPCODE_RC_RDMA_WRITE_ONLY] = {
.name = "IB_OPCODE_RC_RDMA_WRITE_ONLY",
.mask = RXE_RETH_MASK | RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_WRITE_MASK | RXE_START_MASK |
RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_RETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RETH_BYTES,
}
},
[IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = {
.name = "IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE",
.mask = RXE_RETH_MASK | RXE_IMMDT_MASK | RXE_PAYLOAD_MASK |
RXE_REQ_MASK | RXE_WRITE_MASK |
RXE_COMP_MASK | RXE_RWR_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_IMMDT_BYTES + RXE_RETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RETH] = RXE_BTH_BYTES,
[RXE_IMMDT] = RXE_BTH_BYTES +
RXE_RETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RETH_BYTES +
RXE_IMMDT_BYTES,
}
},
[IB_OPCODE_RC_RDMA_READ_REQUEST] = {
.name = "IB_OPCODE_RC_RDMA_READ_REQUEST",
.mask = RXE_RETH_MASK | RXE_REQ_MASK | RXE_READ_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_RETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RETH_BYTES,
}
},
[IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST] = {
.name = "IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST",
.mask = RXE_AETH_MASK | RXE_PAYLOAD_MASK | RXE_ACK_MASK |
RXE_START_MASK,
.length = RXE_BTH_BYTES + RXE_AETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_AETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_AETH_BYTES,
}
},
[IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE] = {
.name = "IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE",
.mask = RXE_PAYLOAD_MASK | RXE_ACK_MASK | RXE_MIDDLE_MASK,
.length = RXE_BTH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_PAYLOAD] = RXE_BTH_BYTES,
}
},
[IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST] = {
.name = "IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST",
.mask = RXE_AETH_MASK | RXE_PAYLOAD_MASK | RXE_ACK_MASK |
RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_AETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_AETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_AETH_BYTES,
}
},
[IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY] = {
.name = "IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY",
.mask = RXE_AETH_MASK | RXE_PAYLOAD_MASK | RXE_ACK_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_AETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_AETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_AETH_BYTES,
}
},
[IB_OPCODE_RC_ACKNOWLEDGE] = {
.name = "IB_OPCODE_RC_ACKNOWLEDGE",
.mask = RXE_AETH_MASK | RXE_ACK_MASK | RXE_START_MASK |
RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_AETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_AETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_AETH_BYTES,
}
},
[IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE] = {
.name = "IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE",
.mask = RXE_AETH_MASK | RXE_ATMACK_MASK | RXE_ACK_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_ATMACK_BYTES + RXE_AETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_AETH] = RXE_BTH_BYTES,
[RXE_ATMACK] = RXE_BTH_BYTES +
RXE_AETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_ATMACK_BYTES +
RXE_AETH_BYTES,
}
},
[IB_OPCODE_RC_COMPARE_SWAP] = {
.name = "IB_OPCODE_RC_COMPARE_SWAP",
.mask = RXE_ATMETH_MASK | RXE_REQ_MASK | RXE_ATOMIC_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_ATMETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_ATMETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_ATMETH_BYTES,
}
},
[IB_OPCODE_RC_FETCH_ADD] = {
.name = "IB_OPCODE_RC_FETCH_ADD",
.mask = RXE_ATMETH_MASK | RXE_REQ_MASK | RXE_ATOMIC_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_ATMETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_ATMETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_ATMETH_BYTES,
}
},
[IB_OPCODE_RC_SEND_LAST_WITH_INVALIDATE] = {
.name = "IB_OPCODE_RC_SEND_LAST_WITH_INVALIDATE",
.mask = RXE_IETH_MASK | RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_COMP_MASK | RXE_SEND_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_IETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_IETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_IETH_BYTES,
}
},
[IB_OPCODE_RC_SEND_ONLY_WITH_INVALIDATE] = {
.name = "IB_OPCODE_RC_SEND_ONLY_INV",
.mask = RXE_IETH_MASK | RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_COMP_MASK | RXE_RWR_MASK | RXE_SEND_MASK |
RXE_END_MASK | RXE_START_MASK,
.length = RXE_BTH_BYTES + RXE_IETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_IETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_IETH_BYTES,
}
},
[IB_OPCODE_RC_FLUSH] = {
.name = "IB_OPCODE_RC_FLUSH",
.mask = RXE_FETH_MASK | RXE_RETH_MASK | RXE_FLUSH_MASK |
RXE_START_MASK | RXE_END_MASK | RXE_REQ_MASK,
.length = RXE_BTH_BYTES + RXE_FETH_BYTES + RXE_RETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_FETH] = RXE_BTH_BYTES,
[RXE_RETH] = RXE_BTH_BYTES + RXE_FETH_BYTES,
}
},
[IB_OPCODE_RC_ATOMIC_WRITE] = {
.name = "IB_OPCODE_RC_ATOMIC_WRITE",
.mask = RXE_RETH_MASK | RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_ATOMIC_WRITE_MASK | RXE_START_MASK |
RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_RETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES + RXE_RETH_BYTES,
}
},
/* UC */
[IB_OPCODE_UC_SEND_FIRST] = {
.name = "IB_OPCODE_UC_SEND_FIRST",
.mask = RXE_PAYLOAD_MASK | RXE_REQ_MASK | RXE_RWR_MASK |
RXE_SEND_MASK | RXE_START_MASK,
.length = RXE_BTH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_PAYLOAD] = RXE_BTH_BYTES,
}
},
[IB_OPCODE_UC_SEND_MIDDLE] = {
.name = "IB_OPCODE_UC_SEND_MIDDLE",
.mask = RXE_PAYLOAD_MASK | RXE_REQ_MASK | RXE_SEND_MASK |
RXE_MIDDLE_MASK,
.length = RXE_BTH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_PAYLOAD] = RXE_BTH_BYTES,
}
},
[IB_OPCODE_UC_SEND_LAST] = {
.name = "IB_OPCODE_UC_SEND_LAST",
.mask = RXE_PAYLOAD_MASK | RXE_REQ_MASK | RXE_COMP_MASK |
RXE_SEND_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_PAYLOAD] = RXE_BTH_BYTES,
}
},
[IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE] = {
.name = "IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE",
.mask = RXE_IMMDT_MASK | RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_COMP_MASK | RXE_SEND_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_IMMDT_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_IMMDT] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_IMMDT_BYTES,
}
},
[IB_OPCODE_UC_SEND_ONLY] = {
.name = "IB_OPCODE_UC_SEND_ONLY",
.mask = RXE_PAYLOAD_MASK | RXE_REQ_MASK | RXE_COMP_MASK |
RXE_RWR_MASK | RXE_SEND_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_PAYLOAD] = RXE_BTH_BYTES,
}
},
[IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE] = {
.name = "IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE",
.mask = RXE_IMMDT_MASK | RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_COMP_MASK | RXE_RWR_MASK | RXE_SEND_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_IMMDT_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_IMMDT] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_IMMDT_BYTES,
}
},
[IB_OPCODE_UC_RDMA_WRITE_FIRST] = {
.name = "IB_OPCODE_UC_RDMA_WRITE_FIRST",
.mask = RXE_RETH_MASK | RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_WRITE_MASK | RXE_START_MASK,
.length = RXE_BTH_BYTES + RXE_RETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RETH_BYTES,
}
},
[IB_OPCODE_UC_RDMA_WRITE_MIDDLE] = {
.name = "IB_OPCODE_UC_RDMA_WRITE_MIDDLE",
.mask = RXE_PAYLOAD_MASK | RXE_REQ_MASK | RXE_WRITE_MASK |
RXE_MIDDLE_MASK,
.length = RXE_BTH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_PAYLOAD] = RXE_BTH_BYTES,
}
},
[IB_OPCODE_UC_RDMA_WRITE_LAST] = {
.name = "IB_OPCODE_UC_RDMA_WRITE_LAST",
.mask = RXE_PAYLOAD_MASK | RXE_REQ_MASK | RXE_WRITE_MASK |
RXE_END_MASK,
.length = RXE_BTH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_PAYLOAD] = RXE_BTH_BYTES,
}
},
[IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = {
.name = "IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE",
.mask = RXE_IMMDT_MASK | RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_WRITE_MASK | RXE_COMP_MASK | RXE_RWR_MASK |
RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_IMMDT_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_IMMDT] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_IMMDT_BYTES,
}
},
[IB_OPCODE_UC_RDMA_WRITE_ONLY] = {
.name = "IB_OPCODE_UC_RDMA_WRITE_ONLY",
.mask = RXE_RETH_MASK | RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_WRITE_MASK | RXE_START_MASK |
RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_RETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RETH_BYTES,
}
},
[IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = {
.name = "IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE",
.mask = RXE_RETH_MASK | RXE_IMMDT_MASK | RXE_PAYLOAD_MASK |
RXE_REQ_MASK | RXE_WRITE_MASK |
RXE_COMP_MASK | RXE_RWR_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_IMMDT_BYTES + RXE_RETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RETH] = RXE_BTH_BYTES,
[RXE_IMMDT] = RXE_BTH_BYTES +
RXE_RETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RETH_BYTES +
RXE_IMMDT_BYTES,
}
},
/* RD */
[IB_OPCODE_RD_SEND_FIRST] = {
.name = "IB_OPCODE_RD_SEND_FIRST",
.mask = RXE_RDETH_MASK | RXE_DETH_MASK | RXE_PAYLOAD_MASK |
RXE_REQ_MASK | RXE_RWR_MASK | RXE_SEND_MASK |
RXE_START_MASK,
.length = RXE_BTH_BYTES + RXE_DETH_BYTES + RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_DETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES,
}
},
[IB_OPCODE_RD_SEND_MIDDLE] = {
.name = "IB_OPCODE_RD_SEND_MIDDLE",
.mask = RXE_RDETH_MASK | RXE_DETH_MASK | RXE_PAYLOAD_MASK |
RXE_REQ_MASK | RXE_SEND_MASK |
RXE_MIDDLE_MASK,
.length = RXE_BTH_BYTES + RXE_DETH_BYTES + RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_DETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES,
}
},
[IB_OPCODE_RD_SEND_LAST] = {
.name = "IB_OPCODE_RD_SEND_LAST",
.mask = RXE_RDETH_MASK | RXE_DETH_MASK | RXE_PAYLOAD_MASK |
RXE_REQ_MASK | RXE_COMP_MASK | RXE_SEND_MASK |
RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_DETH_BYTES + RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_DETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES,
}
},
[IB_OPCODE_RD_SEND_LAST_WITH_IMMEDIATE] = {
.name = "IB_OPCODE_RD_SEND_LAST_WITH_IMMEDIATE",
.mask = RXE_RDETH_MASK | RXE_DETH_MASK | RXE_IMMDT_MASK |
RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_COMP_MASK | RXE_SEND_MASK |
RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_IMMDT_BYTES + RXE_DETH_BYTES +
RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_DETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_IMMDT] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES +
RXE_IMMDT_BYTES,
}
},
[IB_OPCODE_RD_SEND_ONLY] = {
.name = "IB_OPCODE_RD_SEND_ONLY",
.mask = RXE_RDETH_MASK | RXE_DETH_MASK | RXE_PAYLOAD_MASK |
RXE_REQ_MASK | RXE_COMP_MASK | RXE_RWR_MASK |
RXE_SEND_MASK | RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_DETH_BYTES + RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_DETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES,
}
},
[IB_OPCODE_RD_SEND_ONLY_WITH_IMMEDIATE] = {
.name = "IB_OPCODE_RD_SEND_ONLY_WITH_IMMEDIATE",
.mask = RXE_RDETH_MASK | RXE_DETH_MASK | RXE_IMMDT_MASK |
RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_COMP_MASK | RXE_RWR_MASK | RXE_SEND_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_IMMDT_BYTES + RXE_DETH_BYTES +
RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_DETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_IMMDT] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES +
RXE_IMMDT_BYTES,
}
},
[IB_OPCODE_RD_RDMA_WRITE_FIRST] = {
.name = "IB_OPCODE_RD_RDMA_WRITE_FIRST",
.mask = RXE_RDETH_MASK | RXE_DETH_MASK | RXE_RETH_MASK |
RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_WRITE_MASK | RXE_START_MASK,
.length = RXE_BTH_BYTES + RXE_RETH_BYTES + RXE_DETH_BYTES +
RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_DETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_RETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES +
RXE_RETH_BYTES,
}
},
[IB_OPCODE_RD_RDMA_WRITE_MIDDLE] = {
.name = "IB_OPCODE_RD_RDMA_WRITE_MIDDLE",
.mask = RXE_RDETH_MASK | RXE_DETH_MASK | RXE_PAYLOAD_MASK |
RXE_REQ_MASK | RXE_WRITE_MASK |
RXE_MIDDLE_MASK,
.length = RXE_BTH_BYTES + RXE_DETH_BYTES + RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_DETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES,
}
},
[IB_OPCODE_RD_RDMA_WRITE_LAST] = {
.name = "IB_OPCODE_RD_RDMA_WRITE_LAST",
.mask = RXE_RDETH_MASK | RXE_DETH_MASK | RXE_PAYLOAD_MASK |
RXE_REQ_MASK | RXE_WRITE_MASK |
RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_DETH_BYTES + RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_DETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES,
}
},
[IB_OPCODE_RD_RDMA_WRITE_LAST_WITH_IMMEDIATE] = {
.name = "IB_OPCODE_RD_RDMA_WRITE_LAST_WITH_IMMEDIATE",
.mask = RXE_RDETH_MASK | RXE_DETH_MASK | RXE_IMMDT_MASK |
RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_WRITE_MASK | RXE_COMP_MASK | RXE_RWR_MASK |
RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_IMMDT_BYTES + RXE_DETH_BYTES +
RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_DETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_IMMDT] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES +
RXE_IMMDT_BYTES,
}
},
[IB_OPCODE_RD_RDMA_WRITE_ONLY] = {
.name = "IB_OPCODE_RD_RDMA_WRITE_ONLY",
.mask = RXE_RDETH_MASK | RXE_DETH_MASK | RXE_RETH_MASK |
RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_WRITE_MASK | RXE_START_MASK |
RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_RETH_BYTES + RXE_DETH_BYTES +
RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_DETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_RETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES +
RXE_RETH_BYTES,
}
},
[IB_OPCODE_RD_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = {
.name = "IB_OPCODE_RD_RDMA_WRITE_ONLY_WITH_IMMEDIATE",
.mask = RXE_RDETH_MASK | RXE_DETH_MASK | RXE_RETH_MASK |
RXE_IMMDT_MASK | RXE_PAYLOAD_MASK |
RXE_REQ_MASK | RXE_WRITE_MASK |
RXE_COMP_MASK | RXE_RWR_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_IMMDT_BYTES + RXE_RETH_BYTES +
RXE_DETH_BYTES + RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_DETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_RETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES,
[RXE_IMMDT] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES +
RXE_RETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES +
RXE_RETH_BYTES +
RXE_IMMDT_BYTES,
}
},
[IB_OPCODE_RD_RDMA_READ_REQUEST] = {
.name = "IB_OPCODE_RD_RDMA_READ_REQUEST",
.mask = RXE_RDETH_MASK | RXE_DETH_MASK | RXE_RETH_MASK |
RXE_REQ_MASK | RXE_READ_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_RETH_BYTES + RXE_DETH_BYTES +
RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_DETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_RETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RETH_BYTES +
RXE_DETH_BYTES +
RXE_RDETH_BYTES,
}
},
[IB_OPCODE_RD_RDMA_READ_RESPONSE_FIRST] = {
.name = "IB_OPCODE_RD_RDMA_READ_RESPONSE_FIRST",
.mask = RXE_RDETH_MASK | RXE_AETH_MASK |
RXE_PAYLOAD_MASK | RXE_ACK_MASK |
RXE_START_MASK,
.length = RXE_BTH_BYTES + RXE_AETH_BYTES + RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_AETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_AETH_BYTES,
}
},
[IB_OPCODE_RD_RDMA_READ_RESPONSE_MIDDLE] = {
.name = "IB_OPCODE_RD_RDMA_READ_RESPONSE_MIDDLE",
.mask = RXE_RDETH_MASK | RXE_PAYLOAD_MASK | RXE_ACK_MASK |
RXE_MIDDLE_MASK,
.length = RXE_BTH_BYTES + RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
}
},
[IB_OPCODE_RD_RDMA_READ_RESPONSE_LAST] = {
.name = "IB_OPCODE_RD_RDMA_READ_RESPONSE_LAST",
.mask = RXE_RDETH_MASK | RXE_AETH_MASK | RXE_PAYLOAD_MASK |
RXE_ACK_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_AETH_BYTES + RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_AETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_AETH_BYTES,
}
},
[IB_OPCODE_RD_RDMA_READ_RESPONSE_ONLY] = {
.name = "IB_OPCODE_RD_RDMA_READ_RESPONSE_ONLY",
.mask = RXE_RDETH_MASK | RXE_AETH_MASK | RXE_PAYLOAD_MASK |
RXE_ACK_MASK | RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_AETH_BYTES + RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_AETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_AETH_BYTES,
}
},
[IB_OPCODE_RD_ACKNOWLEDGE] = {
.name = "IB_OPCODE_RD_ACKNOWLEDGE",
.mask = RXE_RDETH_MASK | RXE_AETH_MASK | RXE_ACK_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_AETH_BYTES + RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_AETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
}
},
[IB_OPCODE_RD_ATOMIC_ACKNOWLEDGE] = {
.name = "IB_OPCODE_RD_ATOMIC_ACKNOWLEDGE",
.mask = RXE_RDETH_MASK | RXE_AETH_MASK | RXE_ATMACK_MASK |
RXE_ACK_MASK | RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_ATMACK_BYTES + RXE_AETH_BYTES +
RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_AETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_ATMACK] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_AETH_BYTES,
}
},
[IB_OPCODE_RD_COMPARE_SWAP] = {
.name = "RD_COMPARE_SWAP",
.mask = RXE_RDETH_MASK | RXE_DETH_MASK | RXE_ATMETH_MASK |
RXE_REQ_MASK | RXE_ATOMIC_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_ATMETH_BYTES + RXE_DETH_BYTES +
RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_DETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_ATMETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_ATMETH_BYTES +
RXE_DETH_BYTES +
RXE_RDETH_BYTES,
}
},
[IB_OPCODE_RD_FETCH_ADD] = {
.name = "IB_OPCODE_RD_FETCH_ADD",
.mask = RXE_RDETH_MASK | RXE_DETH_MASK | RXE_ATMETH_MASK |
RXE_REQ_MASK | RXE_ATOMIC_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_ATMETH_BYTES + RXE_DETH_BYTES +
RXE_RDETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_RDETH] = RXE_BTH_BYTES,
[RXE_DETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES,
[RXE_ATMETH] = RXE_BTH_BYTES +
RXE_RDETH_BYTES +
RXE_DETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_ATMETH_BYTES +
RXE_DETH_BYTES +
RXE_RDETH_BYTES,
}
},
/* UD */
[IB_OPCODE_UD_SEND_ONLY] = {
.name = "IB_OPCODE_UD_SEND_ONLY",
.mask = RXE_DETH_MASK | RXE_PAYLOAD_MASK | RXE_REQ_MASK |
RXE_COMP_MASK | RXE_RWR_MASK | RXE_SEND_MASK |
RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_DETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_DETH] = RXE_BTH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_DETH_BYTES,
}
},
[IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE] = {
.name = "IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE",
.mask = RXE_DETH_MASK | RXE_IMMDT_MASK | RXE_PAYLOAD_MASK |
RXE_REQ_MASK | RXE_COMP_MASK | RXE_RWR_MASK |
RXE_SEND_MASK | RXE_START_MASK | RXE_END_MASK,
.length = RXE_BTH_BYTES + RXE_IMMDT_BYTES + RXE_DETH_BYTES,
.offset = {
[RXE_BTH] = 0,
[RXE_DETH] = RXE_BTH_BYTES,
[RXE_IMMDT] = RXE_BTH_BYTES +
RXE_DETH_BYTES,
[RXE_PAYLOAD] = RXE_BTH_BYTES +
RXE_DETH_BYTES +
RXE_IMMDT_BYTES,
}
},
};
| linux-master | drivers/infiniband/sw/rxe/rxe_opcode.c |
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
*/
#include <linux/vmalloc.h>
#include "rxe.h"
#include "rxe_loc.h"
#include "rxe_queue.h"
int do_mmap_info(struct rxe_dev *rxe, struct mminfo __user *outbuf,
struct ib_udata *udata, struct rxe_queue_buf *buf,
size_t buf_size, struct rxe_mmap_info **ip_p)
{
int err;
struct rxe_mmap_info *ip = NULL;
if (outbuf) {
ip = rxe_create_mmap_info(rxe, buf_size, udata, buf);
if (IS_ERR(ip)) {
err = PTR_ERR(ip);
goto err1;
}
if (copy_to_user(outbuf, &ip->info, sizeof(ip->info))) {
err = -EFAULT;
goto err2;
}
spin_lock_bh(&rxe->pending_lock);
list_add(&ip->pending_mmaps, &rxe->pending_mmaps);
spin_unlock_bh(&rxe->pending_lock);
}
*ip_p = ip;
return 0;
err2:
kfree(ip);
err1:
return err;
}
inline void rxe_queue_reset(struct rxe_queue *q)
{
/* queue is comprised from header and the memory
* of the actual queue. See "struct rxe_queue_buf" in rxe_queue.h
* reset only the queue itself and not the management header
*/
memset(q->buf->data, 0, q->buf_size - sizeof(struct rxe_queue_buf));
}
struct rxe_queue *rxe_queue_init(struct rxe_dev *rxe, int *num_elem,
unsigned int elem_size, enum queue_type type)
{
struct rxe_queue *q;
size_t buf_size;
unsigned int num_slots;
/* num_elem == 0 is allowed, but uninteresting */
if (*num_elem < 0)
return NULL;
q = kzalloc(sizeof(*q), GFP_KERNEL);
if (!q)
return NULL;
q->rxe = rxe;
q->type = type;
/* used in resize, only need to copy used part of queue */
q->elem_size = elem_size;
/* pad element up to at least a cacheline and always a power of 2 */
if (elem_size < cache_line_size())
elem_size = cache_line_size();
elem_size = roundup_pow_of_two(elem_size);
q->log2_elem_size = order_base_2(elem_size);
num_slots = *num_elem + 1;
num_slots = roundup_pow_of_two(num_slots);
q->index_mask = num_slots - 1;
buf_size = sizeof(struct rxe_queue_buf) + num_slots * elem_size;
q->buf = vmalloc_user(buf_size);
if (!q->buf)
goto err2;
q->buf->log2_elem_size = q->log2_elem_size;
q->buf->index_mask = q->index_mask;
q->buf_size = buf_size;
*num_elem = num_slots - 1;
return q;
err2:
kfree(q);
return NULL;
}
/* copies elements from original q to new q and then swaps the contents of the
* two q headers. This is so that if anyone is holding a pointer to q it will
* still work
*/
static int resize_finish(struct rxe_queue *q, struct rxe_queue *new_q,
unsigned int num_elem)
{
enum queue_type type = q->type;
u32 new_prod;
u32 prod;
u32 cons;
if (!queue_empty(q, q->type) && (num_elem < queue_count(q, type)))
return -EINVAL;
new_prod = queue_get_producer(new_q, type);
prod = queue_get_producer(q, type);
cons = queue_get_consumer(q, type);
while ((prod - cons) & q->index_mask) {
memcpy(queue_addr_from_index(new_q, new_prod),
queue_addr_from_index(q, cons), new_q->elem_size);
new_prod = queue_next_index(new_q, new_prod);
cons = queue_next_index(q, cons);
}
new_q->buf->producer_index = new_prod;
q->buf->consumer_index = cons;
/* update private index copies */
if (type == QUEUE_TYPE_TO_CLIENT)
new_q->index = new_q->buf->producer_index;
else
q->index = q->buf->consumer_index;
/* exchange rxe_queue headers */
swap(*q, *new_q);
return 0;
}
int rxe_queue_resize(struct rxe_queue *q, unsigned int *num_elem_p,
unsigned int elem_size, struct ib_udata *udata,
struct mminfo __user *outbuf, spinlock_t *producer_lock,
spinlock_t *consumer_lock)
{
struct rxe_queue *new_q;
unsigned int num_elem = *num_elem_p;
int err;
unsigned long producer_flags;
unsigned long consumer_flags;
new_q = rxe_queue_init(q->rxe, &num_elem, elem_size, q->type);
if (!new_q)
return -ENOMEM;
err = do_mmap_info(new_q->rxe, outbuf, udata, new_q->buf,
new_q->buf_size, &new_q->ip);
if (err) {
vfree(new_q->buf);
kfree(new_q);
goto err1;
}
spin_lock_irqsave(consumer_lock, consumer_flags);
if (producer_lock) {
spin_lock_irqsave(producer_lock, producer_flags);
err = resize_finish(q, new_q, num_elem);
spin_unlock_irqrestore(producer_lock, producer_flags);
} else {
err = resize_finish(q, new_q, num_elem);
}
spin_unlock_irqrestore(consumer_lock, consumer_flags);
rxe_queue_cleanup(new_q); /* new/old dep on err */
if (err)
goto err1;
*num_elem_p = num_elem;
return 0;
err1:
return err;
}
void rxe_queue_cleanup(struct rxe_queue *q)
{
if (q->ip)
kref_put(&q->ip->ref, rxe_mmap_release);
else
vfree(q->buf);
kfree(q);
}
| linux-master | drivers/infiniband/sw/rxe/rxe_queue.c |
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