python_code
stringlengths 0
1.8M
| repo_name
stringclasses 7
values | file_path
stringlengths 5
99
|
|---|---|---|
// SPDX-License-Identifier: GPL-2.0
/*
* Parade TrueTouch(TM) Standard Product V5 Module.
*
* Copyright (C) 2015 Parade Technologies
* Copyright (C) 2012-2015 Cypress Semiconductor
* Copyright (C) 2018 Bootlin
*
* Authors: Mylène Josserand <[email protected]>
* Alistair Francis <[email protected]>
*/
#include <linux/crc-itu-t.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <asm/unaligned.h>
#define CYTTSP5_NAME "cyttsp5"
#define CY_I2C_DATA_SIZE (2 * 256)
#define HID_VERSION 0x0100
#define CY_MAX_INPUT 512
#define CYTTSP5_PREALLOCATED_CMD_BUFFER 32
#define CY_BITS_PER_BTN 1
#define CY_NUM_BTN_EVENT_ID GENMASK(CY_BITS_PER_BTN - 1, 0)
#define MAX_AREA 255
#define HID_OUTPUT_BL_SOP 0x1
#define HID_OUTPUT_BL_EOP 0x17
#define HID_OUTPUT_BL_LAUNCH_APP 0x3B
#define HID_OUTPUT_BL_LAUNCH_APP_SIZE 11
#define HID_OUTPUT_GET_SYSINFO 0x2
#define HID_OUTPUT_GET_SYSINFO_SIZE 5
#define HID_OUTPUT_MAX_CMD_SIZE 12
#define HID_DESC_REG 0x1
#define HID_INPUT_REG 0x3
#define HID_OUTPUT_REG 0x4
#define HID_COMMAND_REG 0x5
#define REPORT_ID_TOUCH 0x1
#define REPORT_ID_BTN 0x3
#define REPORT_SIZE_5 5
#define REPORT_SIZE_8 8
#define REPORT_SIZE_16 16
/* Touch reports offsets */
/* Header offsets */
#define TOUCH_REPORT_DESC_HDR_CONTACTCOUNT 16
/* Record offsets */
#define TOUCH_REPORT_DESC_CONTACTID 8
#define TOUCH_REPORT_DESC_X 16
#define TOUCH_REPORT_DESC_Y 32
#define TOUCH_REPORT_DESC_P 48
#define TOUCH_REPORT_DESC_MAJ 56
#define TOUCH_REPORT_DESC_MIN 64
/* HID */
#define HID_TOUCH_REPORT_ID 0x1
#define HID_BTN_REPORT_ID 0x3
#define HID_APP_RESPONSE_REPORT_ID 0x1F
#define HID_APP_OUTPUT_REPORT_ID 0x2F
#define HID_BL_RESPONSE_REPORT_ID 0x30
#define HID_BL_OUTPUT_REPORT_ID 0x40
#define HID_RESPONSE_REPORT_ID 0xF0
#define HID_OUTPUT_RESPONSE_REPORT_OFFSET 2
#define HID_OUTPUT_RESPONSE_CMD_OFFSET 4
#define HID_OUTPUT_RESPONSE_CMD_MASK GENMASK(6, 0)
#define HID_SYSINFO_SENSING_OFFSET 33
#define HID_SYSINFO_BTN_OFFSET 48
#define HID_SYSINFO_BTN_MASK GENMASK(7, 0)
#define HID_SYSINFO_MAX_BTN 8
#define HID_CMD_SET_POWER 0x8
#define HID_POWER_ON 0x0
#define HID_POWER_SLEEP 0x1
#define CY_HID_OUTPUT_TIMEOUT_MS 200
#define CY_HID_OUTPUT_GET_SYSINFO_TIMEOUT_MS 3000
#define CY_HID_GET_HID_DESCRIPTOR_TIMEOUT_MS 4000
#define CY_HID_SET_POWER_TIMEOUT 500
/* maximum number of concurrent tracks */
#define TOUCH_REPORT_SIZE 10
#define TOUCH_INPUT_HEADER_SIZE 7
#define BTN_REPORT_SIZE 9
#define BTN_INPUT_HEADER_SIZE 5
#define MAX_CY_TCH_T_IDS 32
/* All usage pages for Touch Report */
#define TOUCH_REPORT_USAGE_PG_X 0x00010030
#define TOUCH_REPORT_USAGE_PG_Y 0x00010031
#define TOUCH_REPORT_USAGE_PG_P 0x000D0030
#define TOUCH_REPORT_USAGE_PG_CONTACTID 0x000D0051
#define TOUCH_REPORT_USAGE_PG_CONTACTCOUNT 0x000D0054
#define TOUCH_REPORT_USAGE_PG_MAJ 0xFF010062
#define TOUCH_REPORT_USAGE_PG_MIN 0xFF010063
#define TOUCH_COL_USAGE_PG 0x000D0022
#define SET_CMD_LOW(byte, bits) \
((byte) = (((byte) & 0xF0) | ((bits) & 0x0F)))
#define SET_CMD_HIGH(byte, bits)\
((byte) = (((byte) & 0x0F) | ((bits) & 0xF0)))
#define SET_CMD_OPCODE(byte, opcode) SET_CMD_LOW(byte, opcode)
#define SET_CMD_REPORT_TYPE(byte, type) SET_CMD_HIGH(byte, ((type) << 4))
#define SET_CMD_REPORT_ID(byte, id) SET_CMD_LOW(byte, id)
/* System Information interface definitions */
struct cyttsp5_sensing_conf_data_dev {
u8 electrodes_x;
u8 electrodes_y;
__le16 len_x;
__le16 len_y;
__le16 res_x;
__le16 res_y;
__le16 max_z;
u8 origin_x;
u8 origin_y;
u8 panel_id;
u8 btn;
u8 scan_mode;
u8 max_num_of_tch_per_refresh_cycle;
} __packed;
struct cyttsp5_sensing_conf_data {
u16 res_x;
u16 res_y;
u16 max_z;
u16 len_x;
u16 len_y;
u8 origin_x;
u8 origin_y;
u8 max_tch;
};
enum cyttsp5_tch_abs { /* for ordering within the extracted touch data array */
CY_TCH_X, /* X */
CY_TCH_Y, /* Y */
CY_TCH_P, /* P (Z) */
CY_TCH_T, /* TOUCH ID */
CY_TCH_MAJ, /* TOUCH_MAJOR */
CY_TCH_MIN, /* TOUCH_MINOR */
CY_TCH_NUM_ABS
};
struct cyttsp5_tch_abs_params {
size_t ofs; /* abs byte offset */
size_t size; /* size in bits */
size_t min; /* min value */
size_t max; /* max value */
size_t bofs; /* bit offset */
};
struct cyttsp5_touch {
int abs[CY_TCH_NUM_ABS];
};
struct cyttsp5_sysinfo {
struct cyttsp5_sensing_conf_data sensing_conf_data;
int num_btns;
struct cyttsp5_tch_abs_params tch_hdr;
struct cyttsp5_tch_abs_params tch_abs[CY_TCH_NUM_ABS];
u32 key_code[HID_SYSINFO_MAX_BTN];
};
struct cyttsp5_hid_desc {
__le16 hid_desc_len;
u8 packet_id;
u8 reserved_byte;
__le16 bcd_version;
__le16 report_desc_len;
__le16 report_desc_register;
__le16 input_register;
__le16 max_input_len;
__le16 output_register;
__le16 max_output_len;
__le16 command_register;
__le16 data_register;
__le16 vendor_id;
__le16 product_id;
__le16 version_id;
u8 reserved[4];
} __packed;
struct cyttsp5 {
struct device *dev;
struct completion cmd_done;
struct cyttsp5_sysinfo sysinfo;
struct cyttsp5_hid_desc hid_desc;
u8 cmd_buf[CYTTSP5_PREALLOCATED_CMD_BUFFER];
u8 input_buf[CY_MAX_INPUT];
u8 response_buf[CY_MAX_INPUT];
struct gpio_desc *reset_gpio;
struct input_dev *input;
char phys[NAME_MAX];
int num_prv_rec;
struct regmap *regmap;
struct touchscreen_properties prop;
struct regulator *vdd;
};
/*
* For what is understood in the datasheet, the register does not
* matter. For consistency, use the Input Register address
* but it does mean anything to the device. The important data
* to send is the I2C address
*/
static int cyttsp5_read(struct cyttsp5 *ts, u8 *buf, u32 max)
{
int error;
u32 size;
u8 temp[2];
/* Read the frame to retrieve the size */
error = regmap_bulk_read(ts->regmap, HID_INPUT_REG, temp, sizeof(temp));
if (error)
return error;
size = get_unaligned_le16(temp);
if (!size || size == 2)
return 0;
if (size > max)
return -EINVAL;
/* Get the real value */
return regmap_bulk_read(ts->regmap, HID_INPUT_REG, buf, size);
}
static int cyttsp5_write(struct cyttsp5 *ts, unsigned int reg, u8 *data,
size_t size)
{
u8 cmd[HID_OUTPUT_MAX_CMD_SIZE];
if (size + 1 > HID_OUTPUT_MAX_CMD_SIZE)
return -E2BIG;
/* High bytes of register address needed as first byte of cmd */
cmd[0] = (reg >> 8) & 0xFF;
/* Copy the rest of the data */
if (data)
memcpy(&cmd[1], data, size);
/*
* The hardware wants to receive a frame with the address register
* contained in the first two bytes. As the regmap_write function
* add the register adresse in the frame, we use the low byte as
* first frame byte for the address register and the first
* data byte is the high register + left of the cmd to send
*/
return regmap_bulk_write(ts->regmap, reg & 0xFF, cmd, size + 1);
}
static void cyttsp5_get_touch_axis(int *axis, int size, int max, u8 *xy_data,
int bofs)
{
int nbyte;
for (nbyte = 0, *axis = 0; nbyte < size; nbyte++)
*axis += ((xy_data[nbyte] >> bofs) << (nbyte * 8));
*axis &= max - 1;
}
static void cyttsp5_get_touch_record(struct cyttsp5 *ts,
struct cyttsp5_touch *touch, u8 *xy_data)
{
struct cyttsp5_sysinfo *si = &ts->sysinfo;
enum cyttsp5_tch_abs abs;
for (abs = CY_TCH_X; abs < CY_TCH_NUM_ABS; abs++)
cyttsp5_get_touch_axis(&touch->abs[abs],
si->tch_abs[abs].size,
si->tch_abs[abs].max,
xy_data + si->tch_abs[abs].ofs,
si->tch_abs[abs].bofs);
}
static void cyttsp5_get_mt_touches(struct cyttsp5 *ts,
struct cyttsp5_touch *tch, int num_cur_tch)
{
struct cyttsp5_sysinfo *si = &ts->sysinfo;
int i, t = 0, offset = 0;
DECLARE_BITMAP(ids, MAX_CY_TCH_T_IDS);
u8 *tch_addr;
int tmp;
bitmap_zero(ids, MAX_CY_TCH_T_IDS);
memset(tch->abs, 0, sizeof(tch->abs));
switch (ts->input_buf[2]) {
case HID_TOUCH_REPORT_ID:
offset = TOUCH_INPUT_HEADER_SIZE;
break;
case HID_BTN_REPORT_ID:
offset = BTN_INPUT_HEADER_SIZE;
break;
}
for (i = 0; i < num_cur_tch; i++) {
tch_addr = ts->input_buf + offset + (i * TOUCH_REPORT_SIZE);
cyttsp5_get_touch_record(ts, tch, tch_addr);
/* Convert MAJOR/MINOR from mm to resolution */
tmp = tch->abs[CY_TCH_MAJ] * 100 * si->sensing_conf_data.res_x;
tch->abs[CY_TCH_MAJ] = tmp / si->sensing_conf_data.len_x;
tmp = tch->abs[CY_TCH_MIN] * 100 * si->sensing_conf_data.res_x;
tch->abs[CY_TCH_MIN] = tmp / si->sensing_conf_data.len_x;
t = tch->abs[CY_TCH_T];
input_mt_slot(ts->input, t);
input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true);
__set_bit(t, ids);
/* position and pressure fields */
touchscreen_report_pos(ts->input, &ts->prop,
tch->abs[CY_TCH_X], tch->abs[CY_TCH_Y],
true);
input_report_abs(ts->input, ABS_MT_PRESSURE,
tch->abs[CY_TCH_P]);
/* Get the extended touch fields */
input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR,
tch->abs[CY_TCH_MAJ]);
input_report_abs(ts->input, ABS_MT_TOUCH_MINOR,
tch->abs[CY_TCH_MIN]);
}
ts->num_prv_rec = num_cur_tch;
}
static int cyttsp5_mt_attention(struct device *dev)
{
struct cyttsp5 *ts = dev_get_drvdata(dev);
struct cyttsp5_sysinfo *si = &ts->sysinfo;
int max_tch = si->sensing_conf_data.max_tch;
struct cyttsp5_touch tch;
int num_cur_tch;
cyttsp5_get_touch_axis(&num_cur_tch, si->tch_hdr.size,
si->tch_hdr.max,
ts->input_buf + 3 + si->tch_hdr.ofs,
si->tch_hdr.bofs);
if (num_cur_tch > max_tch) {
dev_err(dev, "Num touch err detected (n=%d)\n", num_cur_tch);
num_cur_tch = max_tch;
}
if (num_cur_tch == 0 && ts->num_prv_rec == 0)
return 0;
/* extract xy_data for all currently reported touches */
if (num_cur_tch)
cyttsp5_get_mt_touches(ts, &tch, num_cur_tch);
input_mt_sync_frame(ts->input);
input_sync(ts->input);
return 0;
}
static int cyttsp5_setup_input_device(struct device *dev)
{
struct cyttsp5 *ts = dev_get_drvdata(dev);
struct cyttsp5_sysinfo *si = &ts->sysinfo;
int max_x, max_y, max_p;
int max_x_tmp, max_y_tmp;
int error;
max_x_tmp = si->sensing_conf_data.res_x;
max_y_tmp = si->sensing_conf_data.res_y;
max_x = max_x_tmp - 1;
max_y = max_y_tmp - 1;
max_p = si->sensing_conf_data.max_z;
input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, max_x, 0, 0);
input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, max_y, 0, 0);
input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, max_p, 0, 0);
input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, MAX_AREA, 0, 0);
input_set_abs_params(ts->input, ABS_MT_TOUCH_MINOR, 0, MAX_AREA, 0, 0);
error = input_mt_init_slots(ts->input, si->tch_abs[CY_TCH_T].max,
INPUT_MT_DROP_UNUSED | INPUT_MT_DIRECT);
if (error)
return error;
error = input_register_device(ts->input);
if (error) {
dev_err(dev, "failed to register input device: %d\n", error);
return error;
}
return error;
}
static int cyttsp5_parse_dt_key_code(struct device *dev)
{
struct cyttsp5 *ts = dev_get_drvdata(dev);
struct cyttsp5_sysinfo *si = &ts->sysinfo;
if (!si->num_btns)
return 0;
/* Initialize the button to RESERVED */
memset32(si->key_code, KEY_RESERVED, si->num_btns);
return device_property_read_u32_array(dev, "linux,keycodes",
si->key_code, si->num_btns);
}
static int cyttsp5_btn_attention(struct device *dev)
{
struct cyttsp5 *ts = dev_get_drvdata(dev);
struct cyttsp5_sysinfo *si = &ts->sysinfo;
int cur_btn, offset = 0;
int cur_btn_state;
switch (ts->input_buf[2]) {
case HID_TOUCH_REPORT_ID:
offset = TOUCH_INPUT_HEADER_SIZE;
break;
case HID_BTN_REPORT_ID:
offset = BTN_INPUT_HEADER_SIZE;
break;
}
if (ts->input_buf[2] != HID_BTN_REPORT_ID)
return 0;
/* extract button press/release touch information */
for (cur_btn = 0; cur_btn < si->num_btns; cur_btn++) {
/* Get current button state */
cur_btn_state = (ts->input_buf[offset] >> (cur_btn * CY_BITS_PER_BTN))
& CY_NUM_BTN_EVENT_ID;
input_report_key(ts->input, si->key_code[cur_btn],
cur_btn_state);
input_sync(ts->input);
}
return 0;
}
static int cyttsp5_validate_cmd_response(struct cyttsp5 *ts, u8 code)
{
u16 size, crc;
u8 status, report_id;
int command_code;
size = get_unaligned_le16(&ts->response_buf[0]);
if (!size)
return 0;
report_id = ts->response_buf[HID_OUTPUT_RESPONSE_REPORT_OFFSET];
switch (report_id) {
case HID_BL_RESPONSE_REPORT_ID:
if (ts->response_buf[4] != HID_OUTPUT_BL_SOP) {
dev_err(ts->dev, "HID output response, wrong SOP\n");
return -EPROTO;
}
if (ts->response_buf[size - 1] != HID_OUTPUT_BL_EOP) {
dev_err(ts->dev, "HID output response, wrong EOP\n");
return -EPROTO;
}
crc = crc_itu_t(0xFFFF, &ts->response_buf[4], size - 7);
if (get_unaligned_le16(&ts->response_buf[size - 3]) != crc) {
dev_err(ts->dev,
"HID output response, wrong CRC 0x%X\n",
crc);
return -EPROTO;
}
status = ts->response_buf[5];
if (status) {
dev_err(ts->dev, "HID output response, ERROR:%d\n",
status);
return -EPROTO;
}
break;
case HID_APP_RESPONSE_REPORT_ID:
command_code = ts->response_buf[HID_OUTPUT_RESPONSE_CMD_OFFSET]
& HID_OUTPUT_RESPONSE_CMD_MASK;
if (command_code != code) {
dev_err(ts->dev,
"HID output response, wrong command_code:%X\n",
command_code);
return -EPROTO;
}
break;
}
return 0;
}
static void cyttsp5_si_get_btn_data(struct cyttsp5 *ts)
{
struct cyttsp5_sysinfo *si = &ts->sysinfo;
unsigned int btns = ts->response_buf[HID_SYSINFO_BTN_OFFSET] &
HID_SYSINFO_BTN_MASK;
si->num_btns = hweight8(btns);
}
static int cyttsp5_get_sysinfo_regs(struct cyttsp5 *ts)
{
struct cyttsp5_sensing_conf_data *scd = &ts->sysinfo.sensing_conf_data;
struct cyttsp5_sensing_conf_data_dev *scd_dev =
(struct cyttsp5_sensing_conf_data_dev *)
&ts->response_buf[HID_SYSINFO_SENSING_OFFSET];
cyttsp5_si_get_btn_data(ts);
scd->max_tch = scd_dev->max_num_of_tch_per_refresh_cycle;
scd->res_x = get_unaligned_le16(&scd_dev->res_x);
scd->res_y = get_unaligned_le16(&scd_dev->res_y);
scd->max_z = get_unaligned_le16(&scd_dev->max_z);
scd->len_x = get_unaligned_le16(&scd_dev->len_x);
scd->len_y = get_unaligned_le16(&scd_dev->len_y);
return 0;
}
static int cyttsp5_hid_output_get_sysinfo(struct cyttsp5 *ts)
{
int rc;
u8 cmd[HID_OUTPUT_GET_SYSINFO_SIZE];
/* HI bytes of Output register address */
put_unaligned_le16(HID_OUTPUT_GET_SYSINFO_SIZE, cmd);
cmd[2] = HID_APP_OUTPUT_REPORT_ID;
cmd[3] = 0x0; /* Reserved */
cmd[4] = HID_OUTPUT_GET_SYSINFO;
rc = cyttsp5_write(ts, HID_OUTPUT_REG, cmd,
HID_OUTPUT_GET_SYSINFO_SIZE);
if (rc) {
dev_err(ts->dev, "Failed to write command %d", rc);
return rc;
}
rc = wait_for_completion_interruptible_timeout(&ts->cmd_done,
msecs_to_jiffies(CY_HID_OUTPUT_GET_SYSINFO_TIMEOUT_MS));
if (rc <= 0) {
dev_err(ts->dev, "HID output cmd execution timed out\n");
rc = -ETIMEDOUT;
return rc;
}
rc = cyttsp5_validate_cmd_response(ts, HID_OUTPUT_GET_SYSINFO);
if (rc) {
dev_err(ts->dev, "Validation of the response failed\n");
return rc;
}
return cyttsp5_get_sysinfo_regs(ts);
}
static int cyttsp5_power_control(struct cyttsp5 *ts, bool on)
{
u8 state = on ? HID_POWER_ON : HID_POWER_SLEEP;
u8 cmd[2] = { 0 };
int rc;
SET_CMD_REPORT_TYPE(cmd[0], 0);
SET_CMD_REPORT_ID(cmd[0], HID_POWER_SLEEP);
SET_CMD_OPCODE(cmd[1], HID_CMD_SET_POWER);
rc = cyttsp5_write(ts, HID_COMMAND_REG, cmd, sizeof(cmd));
if (rc) {
dev_err(ts->dev, "Failed to write power command %d", rc);
return rc;
}
rc = wait_for_completion_interruptible_timeout(&ts->cmd_done,
msecs_to_jiffies(CY_HID_SET_POWER_TIMEOUT));
if (rc <= 0) {
dev_err(ts->dev, "HID power cmd execution timed out\n");
return -ETIMEDOUT;
}
if (ts->response_buf[2] != HID_RESPONSE_REPORT_ID ||
(ts->response_buf[3] & 0x03) != state ||
(ts->response_buf[4] & 0x0f) != HID_CMD_SET_POWER) {
dev_err(ts->dev, "Validation of the %s response failed\n",
on ? "wakeup" : "sleep");
return -EINVAL;
}
return 0;
}
static int cyttsp5_hid_output_bl_launch_app(struct cyttsp5 *ts)
{
int rc;
u8 cmd[HID_OUTPUT_BL_LAUNCH_APP_SIZE];
u16 crc;
put_unaligned_le16(HID_OUTPUT_BL_LAUNCH_APP_SIZE, cmd);
cmd[2] = HID_BL_OUTPUT_REPORT_ID;
cmd[3] = 0x0; /* Reserved */
cmd[4] = HID_OUTPUT_BL_SOP;
cmd[5] = HID_OUTPUT_BL_LAUNCH_APP;
put_unaligned_le16(0x00, &cmd[6]);
crc = crc_itu_t(0xFFFF, &cmd[4], 4);
put_unaligned_le16(crc, &cmd[8]);
cmd[10] = HID_OUTPUT_BL_EOP;
rc = cyttsp5_write(ts, HID_OUTPUT_REG, cmd,
HID_OUTPUT_BL_LAUNCH_APP_SIZE);
if (rc) {
dev_err(ts->dev, "Failed to write command %d", rc);
return rc;
}
rc = wait_for_completion_interruptible_timeout(&ts->cmd_done,
msecs_to_jiffies(CY_HID_OUTPUT_TIMEOUT_MS));
if (rc <= 0) {
dev_err(ts->dev, "HID output cmd execution timed out\n");
rc = -ETIMEDOUT;
return rc;
}
rc = cyttsp5_validate_cmd_response(ts, HID_OUTPUT_BL_LAUNCH_APP);
if (rc) {
dev_err(ts->dev, "Validation of the response failed\n");
return rc;
}
return 0;
}
static int cyttsp5_get_hid_descriptor(struct cyttsp5 *ts,
struct cyttsp5_hid_desc *desc)
{
struct device *dev = ts->dev;
int rc;
rc = cyttsp5_write(ts, HID_DESC_REG, NULL, 0);
if (rc) {
dev_err(dev, "Failed to get HID descriptor, rc=%d\n", rc);
return rc;
}
rc = wait_for_completion_interruptible_timeout(&ts->cmd_done,
msecs_to_jiffies(CY_HID_GET_HID_DESCRIPTOR_TIMEOUT_MS));
if (rc <= 0) {
dev_err(ts->dev, "HID get descriptor timed out\n");
rc = -ETIMEDOUT;
return rc;
}
memcpy(desc, ts->response_buf, sizeof(*desc));
/* Check HID descriptor length and version */
if (le16_to_cpu(desc->hid_desc_len) != sizeof(*desc) ||
le16_to_cpu(desc->bcd_version) != HID_VERSION) {
dev_err(dev, "Unsupported HID version\n");
return -ENODEV;
}
return 0;
}
static int fill_tch_abs(struct cyttsp5_tch_abs_params *tch_abs, int report_size,
int offset)
{
tch_abs->ofs = offset / 8;
tch_abs->size = report_size / 8;
if (report_size % 8)
tch_abs->size += 1;
tch_abs->min = 0;
tch_abs->max = 1 << report_size;
tch_abs->bofs = offset - (tch_abs->ofs << 3);
return 0;
}
static irqreturn_t cyttsp5_handle_irq(int irq, void *handle)
{
struct cyttsp5 *ts = handle;
int report_id;
int size;
int error;
error = cyttsp5_read(ts, ts->input_buf, CY_MAX_INPUT);
if (error)
return IRQ_HANDLED;
size = get_unaligned_le16(&ts->input_buf[0]);
if (size == 0) {
/* reset */
report_id = 0;
size = 2;
} else {
report_id = ts->input_buf[2];
}
switch (report_id) {
case HID_TOUCH_REPORT_ID:
cyttsp5_mt_attention(ts->dev);
break;
case HID_BTN_REPORT_ID:
cyttsp5_btn_attention(ts->dev);
break;
case HID_RESPONSE_REPORT_ID:
memcpy(ts->response_buf, ts->input_buf, size);
complete(&ts->cmd_done);
break;
default:
/* It is not an input but a command response */
memcpy(ts->response_buf, ts->input_buf, size);
complete(&ts->cmd_done);
}
return IRQ_HANDLED;
}
static int cyttsp5_deassert_int(struct cyttsp5 *ts)
{
u16 size;
u8 buf[2];
int error;
error = regmap_bulk_read(ts->regmap, HID_INPUT_REG, buf, sizeof(buf));
if (error < 0)
return error;
size = get_unaligned_le16(&buf[0]);
if (size == 2 || size == 0)
return 0;
return -EINVAL;
}
static int cyttsp5_fill_all_touch(struct cyttsp5 *ts)
{
struct cyttsp5_sysinfo *si = &ts->sysinfo;
fill_tch_abs(&si->tch_abs[CY_TCH_X], REPORT_SIZE_16,
TOUCH_REPORT_DESC_X);
fill_tch_abs(&si->tch_abs[CY_TCH_Y], REPORT_SIZE_16,
TOUCH_REPORT_DESC_Y);
fill_tch_abs(&si->tch_abs[CY_TCH_P], REPORT_SIZE_8,
TOUCH_REPORT_DESC_P);
fill_tch_abs(&si->tch_abs[CY_TCH_T], REPORT_SIZE_5,
TOUCH_REPORT_DESC_CONTACTID);
fill_tch_abs(&si->tch_hdr, REPORT_SIZE_5,
TOUCH_REPORT_DESC_HDR_CONTACTCOUNT);
fill_tch_abs(&si->tch_abs[CY_TCH_MAJ], REPORT_SIZE_8,
TOUCH_REPORT_DESC_MAJ);
fill_tch_abs(&si->tch_abs[CY_TCH_MIN], REPORT_SIZE_8,
TOUCH_REPORT_DESC_MIN);
return 0;
}
static int cyttsp5_startup(struct cyttsp5 *ts)
{
int error;
error = cyttsp5_deassert_int(ts);
if (error) {
dev_err(ts->dev, "Error on deassert int r=%d\n", error);
return -ENODEV;
}
/*
* Launch the application as the device starts in bootloader mode
* because of a power-on-reset
*/
error = cyttsp5_hid_output_bl_launch_app(ts);
if (error < 0) {
dev_err(ts->dev, "Error on launch app r=%d\n", error);
return error;
}
error = cyttsp5_get_hid_descriptor(ts, &ts->hid_desc);
if (error < 0) {
dev_err(ts->dev, "Error on getting HID descriptor r=%d\n", error);
return error;
}
error = cyttsp5_fill_all_touch(ts);
if (error < 0) {
dev_err(ts->dev, "Error on report descriptor r=%d\n", error);
return error;
}
error = cyttsp5_hid_output_get_sysinfo(ts);
if (error) {
dev_err(ts->dev, "Error on getting sysinfo r=%d\n", error);
return error;
}
return error;
}
static void cyttsp5_cleanup(void *data)
{
struct cyttsp5 *ts = data;
regulator_disable(ts->vdd);
}
static int cyttsp5_probe(struct device *dev, struct regmap *regmap, int irq,
const char *name)
{
struct cyttsp5 *ts;
struct cyttsp5_sysinfo *si;
int error, i;
ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
/* Initialize device info */
ts->regmap = regmap;
ts->dev = dev;
si = &ts->sysinfo;
dev_set_drvdata(dev, ts);
init_completion(&ts->cmd_done);
/* Power up the device */
ts->vdd = devm_regulator_get(dev, "vdd");
if (IS_ERR(ts->vdd)) {
error = PTR_ERR(ts->vdd);
return error;
}
error = devm_add_action_or_reset(dev, cyttsp5_cleanup, ts);
if (error)
return error;
error = regulator_enable(ts->vdd);
if (error)
return error;
ts->input = devm_input_allocate_device(dev);
if (!ts->input) {
dev_err(dev, "Error, failed to allocate input device\n");
return -ENODEV;
}
ts->input->name = "cyttsp5";
scnprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev));
ts->input->phys = ts->phys;
input_set_drvdata(ts->input, ts);
/* Reset the gpio to be in a reset state */
ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(ts->reset_gpio)) {
error = PTR_ERR(ts->reset_gpio);
dev_err(dev, "Failed to request reset gpio, error %d\n", error);
return error;
}
gpiod_set_value_cansleep(ts->reset_gpio, 0);
/* Need a delay to have device up */
msleep(20);
error = devm_request_threaded_irq(dev, irq, NULL, cyttsp5_handle_irq,
IRQF_ONESHOT, name, ts);
if (error) {
dev_err(dev, "unable to request IRQ\n");
return error;
}
error = cyttsp5_startup(ts);
if (error) {
dev_err(ts->dev, "Fail initial startup r=%d\n", error);
return error;
}
error = cyttsp5_parse_dt_key_code(dev);
if (error < 0) {
dev_err(ts->dev, "Error while parsing dts %d\n", error);
return error;
}
touchscreen_parse_properties(ts->input, true, &ts->prop);
__set_bit(EV_KEY, ts->input->evbit);
for (i = 0; i < si->num_btns; i++)
__set_bit(si->key_code[i], ts->input->keybit);
return cyttsp5_setup_input_device(dev);
}
static int cyttsp5_i2c_probe(struct i2c_client *client)
{
struct regmap *regmap;
static const struct regmap_config config = {
.reg_bits = 8,
.val_bits = 8,
};
regmap = devm_regmap_init_i2c(client, &config);
if (IS_ERR(regmap)) {
dev_err(&client->dev, "regmap allocation failed: %ld\n",
PTR_ERR(regmap));
return PTR_ERR(regmap);
}
return cyttsp5_probe(&client->dev, regmap, client->irq, client->name);
}
static const struct of_device_id cyttsp5_of_match[] = {
{ .compatible = "cypress,tt21000", },
{ }
};
MODULE_DEVICE_TABLE(of, cyttsp5_of_match);
static const struct i2c_device_id cyttsp5_i2c_id[] = {
{ CYTTSP5_NAME, 0, },
{ }
};
MODULE_DEVICE_TABLE(i2c, cyttsp5_i2c_id);
static int __maybe_unused cyttsp5_suspend(struct device *dev)
{
struct cyttsp5 *ts = dev_get_drvdata(dev);
if (!device_may_wakeup(dev))
cyttsp5_power_control(ts, false);
return 0;
}
static int __maybe_unused cyttsp5_resume(struct device *dev)
{
struct cyttsp5 *ts = dev_get_drvdata(dev);
if (!device_may_wakeup(dev))
cyttsp5_power_control(ts, true);
return 0;
}
static SIMPLE_DEV_PM_OPS(cyttsp5_pm, cyttsp5_suspend, cyttsp5_resume);
static struct i2c_driver cyttsp5_i2c_driver = {
.driver = {
.name = CYTTSP5_NAME,
.of_match_table = cyttsp5_of_match,
.pm = &cyttsp5_pm,
},
.probe = cyttsp5_i2c_probe,
.id_table = cyttsp5_i2c_id,
};
module_i2c_driver(cyttsp5_i2c_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Touchscreen driver for Cypress TrueTouch Gen 5 Product");
MODULE_AUTHOR("Mylène Josserand <[email protected]>");
|
linux-master
|
drivers/input/touchscreen/cyttsp5.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for Pixcir I2C touchscreen controllers.
*
* Copyright (C) 2010-2011 Pixcir, Inc.
*/
#include <asm/unaligned.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/slab.h>
#define PIXCIR_MAX_SLOTS 5 /* Max fingers supported by driver */
/*
* Register map
*/
#define PIXCIR_REG_POWER_MODE 51
#define PIXCIR_REG_INT_MODE 52
/*
* Power modes:
* active: max scan speed
* idle: lower scan speed with automatic transition to active on touch
* halt: datasheet says sleep but this is more like halt as the chip
* clocks are cut and it can only be brought out of this mode
* using the RESET pin.
*/
enum pixcir_power_mode {
PIXCIR_POWER_ACTIVE,
PIXCIR_POWER_IDLE,
PIXCIR_POWER_HALT,
};
#define PIXCIR_POWER_MODE_MASK 0x03
#define PIXCIR_POWER_ALLOW_IDLE (1UL << 2)
/*
* Interrupt modes:
* periodical: interrupt is asserted periodicaly
* diff coordinates: interrupt is asserted when coordinates change
* level on touch: interrupt level asserted during touch
* pulse on touch: interrupt pulse asserted during touch
*
*/
enum pixcir_int_mode {
PIXCIR_INT_PERIODICAL,
PIXCIR_INT_DIFF_COORD,
PIXCIR_INT_LEVEL_TOUCH,
PIXCIR_INT_PULSE_TOUCH,
};
#define PIXCIR_INT_MODE_MASK 0x03
#define PIXCIR_INT_ENABLE (1UL << 3)
#define PIXCIR_INT_POL_HIGH (1UL << 2)
/**
* struct pixcir_i2c_chip_data - chip related data
* @max_fingers: Max number of fingers reported simultaneously by h/w
* @has_hw_ids: Hardware supports finger tracking IDs
*
*/
struct pixcir_i2c_chip_data {
u8 max_fingers;
bool has_hw_ids;
};
struct pixcir_i2c_ts_data {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *gpio_attb;
struct gpio_desc *gpio_reset;
struct gpio_desc *gpio_enable;
struct gpio_desc *gpio_wake;
const struct pixcir_i2c_chip_data *chip;
struct touchscreen_properties prop;
bool running;
};
struct pixcir_report_data {
int num_touches;
struct input_mt_pos pos[PIXCIR_MAX_SLOTS];
int ids[PIXCIR_MAX_SLOTS];
};
static void pixcir_ts_parse(struct pixcir_i2c_ts_data *tsdata,
struct pixcir_report_data *report)
{
u8 rdbuf[2 + PIXCIR_MAX_SLOTS * 5];
u8 wrbuf[1] = { 0 };
u8 *bufptr;
u8 touch;
int ret, i;
int readsize;
const struct pixcir_i2c_chip_data *chip = tsdata->chip;
memset(report, 0, sizeof(struct pixcir_report_data));
i = chip->has_hw_ids ? 1 : 0;
readsize = 2 + tsdata->chip->max_fingers * (4 + i);
if (readsize > sizeof(rdbuf))
readsize = sizeof(rdbuf);
ret = i2c_master_send(tsdata->client, wrbuf, sizeof(wrbuf));
if (ret != sizeof(wrbuf)) {
dev_err(&tsdata->client->dev,
"%s: i2c_master_send failed(), ret=%d\n",
__func__, ret);
return;
}
ret = i2c_master_recv(tsdata->client, rdbuf, readsize);
if (ret != readsize) {
dev_err(&tsdata->client->dev,
"%s: i2c_master_recv failed(), ret=%d\n",
__func__, ret);
return;
}
touch = rdbuf[0] & 0x7;
if (touch > tsdata->chip->max_fingers)
touch = tsdata->chip->max_fingers;
report->num_touches = touch;
bufptr = &rdbuf[2];
for (i = 0; i < touch; i++) {
touchscreen_set_mt_pos(&report->pos[i], &tsdata->prop,
get_unaligned_le16(bufptr),
get_unaligned_le16(bufptr + 2));
if (chip->has_hw_ids) {
report->ids[i] = bufptr[4];
bufptr = bufptr + 5;
} else {
bufptr = bufptr + 4;
}
}
}
static void pixcir_ts_report(struct pixcir_i2c_ts_data *ts,
struct pixcir_report_data *report)
{
int slots[PIXCIR_MAX_SLOTS];
int n, i, slot;
struct device *dev = &ts->client->dev;
const struct pixcir_i2c_chip_data *chip = ts->chip;
n = report->num_touches;
if (n > PIXCIR_MAX_SLOTS)
n = PIXCIR_MAX_SLOTS;
if (!ts->chip->has_hw_ids)
input_mt_assign_slots(ts->input, slots, report->pos, n, 0);
for (i = 0; i < n; i++) {
if (chip->has_hw_ids) {
slot = input_mt_get_slot_by_key(ts->input,
report->ids[i]);
if (slot < 0) {
dev_dbg(dev, "no free slot for id 0x%x\n",
report->ids[i]);
continue;
}
} else {
slot = slots[i];
}
input_mt_slot(ts->input, slot);
input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true);
input_report_abs(ts->input, ABS_MT_POSITION_X,
report->pos[i].x);
input_report_abs(ts->input, ABS_MT_POSITION_Y,
report->pos[i].y);
dev_dbg(dev, "%d: slot %d, x %d, y %d\n",
i, slot, report->pos[i].x, report->pos[i].y);
}
input_mt_sync_frame(ts->input);
input_sync(ts->input);
}
static irqreturn_t pixcir_ts_isr(int irq, void *dev_id)
{
struct pixcir_i2c_ts_data *tsdata = dev_id;
struct pixcir_report_data report;
while (tsdata->running) {
/* parse packet */
pixcir_ts_parse(tsdata, &report);
/* report it */
pixcir_ts_report(tsdata, &report);
if (gpiod_get_value_cansleep(tsdata->gpio_attb)) {
if (report.num_touches) {
/*
* Last report with no finger up?
* Do it now then.
*/
input_mt_sync_frame(tsdata->input);
input_sync(tsdata->input);
}
break;
}
msleep(20);
}
return IRQ_HANDLED;
}
static void pixcir_reset(struct pixcir_i2c_ts_data *tsdata)
{
if (!IS_ERR_OR_NULL(tsdata->gpio_reset)) {
gpiod_set_value_cansleep(tsdata->gpio_reset, 1);
ndelay(100); /* datasheet section 1.2.3 says 80ns min. */
gpiod_set_value_cansleep(tsdata->gpio_reset, 0);
/* wait for controller ready. 100ms guess. */
msleep(100);
}
}
static int pixcir_set_power_mode(struct pixcir_i2c_ts_data *ts,
enum pixcir_power_mode mode)
{
struct device *dev = &ts->client->dev;
int ret;
if (mode == PIXCIR_POWER_ACTIVE || mode == PIXCIR_POWER_IDLE) {
if (ts->gpio_wake)
gpiod_set_value_cansleep(ts->gpio_wake, 1);
}
ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_POWER_MODE);
if (ret < 0) {
dev_err(dev, "%s: can't read reg %d : %d\n",
__func__, PIXCIR_REG_POWER_MODE, ret);
return ret;
}
ret &= ~PIXCIR_POWER_MODE_MASK;
ret |= mode;
/* Always AUTO_IDLE */
ret |= PIXCIR_POWER_ALLOW_IDLE;
ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_POWER_MODE, ret);
if (ret < 0) {
dev_err(dev, "%s: can't write reg %d : %d\n",
__func__, PIXCIR_REG_POWER_MODE, ret);
return ret;
}
if (mode == PIXCIR_POWER_HALT) {
if (ts->gpio_wake)
gpiod_set_value_cansleep(ts->gpio_wake, 0);
}
return 0;
}
/*
* Set the interrupt mode for the device i.e. ATTB line behaviour
*
* @polarity : 1 for active high, 0 for active low.
*/
static int pixcir_set_int_mode(struct pixcir_i2c_ts_data *ts,
enum pixcir_int_mode mode, bool polarity)
{
struct device *dev = &ts->client->dev;
int ret;
ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_INT_MODE);
if (ret < 0) {
dev_err(dev, "%s: can't read reg %d : %d\n",
__func__, PIXCIR_REG_INT_MODE, ret);
return ret;
}
ret &= ~PIXCIR_INT_MODE_MASK;
ret |= mode;
if (polarity)
ret |= PIXCIR_INT_POL_HIGH;
else
ret &= ~PIXCIR_INT_POL_HIGH;
ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_INT_MODE, ret);
if (ret < 0) {
dev_err(dev, "%s: can't write reg %d : %d\n",
__func__, PIXCIR_REG_INT_MODE, ret);
return ret;
}
return 0;
}
/*
* Enable/disable interrupt generation
*/
static int pixcir_int_enable(struct pixcir_i2c_ts_data *ts, bool enable)
{
struct device *dev = &ts->client->dev;
int ret;
ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_INT_MODE);
if (ret < 0) {
dev_err(dev, "%s: can't read reg %d : %d\n",
__func__, PIXCIR_REG_INT_MODE, ret);
return ret;
}
if (enable)
ret |= PIXCIR_INT_ENABLE;
else
ret &= ~PIXCIR_INT_ENABLE;
ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_INT_MODE, ret);
if (ret < 0) {
dev_err(dev, "%s: can't write reg %d : %d\n",
__func__, PIXCIR_REG_INT_MODE, ret);
return ret;
}
return 0;
}
static int pixcir_start(struct pixcir_i2c_ts_data *ts)
{
struct device *dev = &ts->client->dev;
int error;
if (ts->gpio_enable) {
gpiod_set_value_cansleep(ts->gpio_enable, 1);
msleep(100);
}
/* LEVEL_TOUCH interrupt with active low polarity */
error = pixcir_set_int_mode(ts, PIXCIR_INT_LEVEL_TOUCH, 0);
if (error) {
dev_err(dev, "Failed to set interrupt mode: %d\n", error);
return error;
}
ts->running = true;
mb(); /* Update status before IRQ can fire */
/* enable interrupt generation */
error = pixcir_int_enable(ts, true);
if (error) {
dev_err(dev, "Failed to enable interrupt generation: %d\n",
error);
return error;
}
return 0;
}
static int pixcir_stop(struct pixcir_i2c_ts_data *ts)
{
int error;
/* Disable interrupt generation */
error = pixcir_int_enable(ts, false);
if (error) {
dev_err(&ts->client->dev,
"Failed to disable interrupt generation: %d\n",
error);
return error;
}
/* Exit ISR if running, no more report parsing */
ts->running = false;
mb(); /* update status before we synchronize irq */
/* Wait till running ISR is complete */
synchronize_irq(ts->client->irq);
if (ts->gpio_enable)
gpiod_set_value_cansleep(ts->gpio_enable, 0);
return 0;
}
static int pixcir_input_open(struct input_dev *dev)
{
struct pixcir_i2c_ts_data *ts = input_get_drvdata(dev);
return pixcir_start(ts);
}
static void pixcir_input_close(struct input_dev *dev)
{
struct pixcir_i2c_ts_data *ts = input_get_drvdata(dev);
pixcir_stop(ts);
}
static int pixcir_i2c_ts_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct pixcir_i2c_ts_data *ts = i2c_get_clientdata(client);
struct input_dev *input = ts->input;
int ret = 0;
mutex_lock(&input->mutex);
if (device_may_wakeup(&client->dev)) {
if (!input_device_enabled(input)) {
ret = pixcir_start(ts);
if (ret) {
dev_err(dev, "Failed to start\n");
goto unlock;
}
}
} else if (input_device_enabled(input)) {
ret = pixcir_stop(ts);
}
unlock:
mutex_unlock(&input->mutex);
return ret;
}
static int pixcir_i2c_ts_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct pixcir_i2c_ts_data *ts = i2c_get_clientdata(client);
struct input_dev *input = ts->input;
int ret = 0;
mutex_lock(&input->mutex);
if (device_may_wakeup(&client->dev)) {
if (!input_device_enabled(input)) {
ret = pixcir_stop(ts);
if (ret) {
dev_err(dev, "Failed to stop\n");
goto unlock;
}
}
} else if (input_device_enabled(input)) {
ret = pixcir_start(ts);
}
unlock:
mutex_unlock(&input->mutex);
return ret;
}
static DEFINE_SIMPLE_DEV_PM_OPS(pixcir_dev_pm_ops,
pixcir_i2c_ts_suspend, pixcir_i2c_ts_resume);
static int pixcir_i2c_ts_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct device *dev = &client->dev;
struct pixcir_i2c_ts_data *tsdata;
struct input_dev *input;
int error;
tsdata = devm_kzalloc(dev, sizeof(*tsdata), GFP_KERNEL);
if (!tsdata)
return -ENOMEM;
tsdata->chip = device_get_match_data(dev);
if (!tsdata->chip && id)
tsdata->chip = (const void *)id->driver_data;
if (!tsdata->chip) {
dev_err(dev, "can't locate chip data\n");
return -EINVAL;
}
input = devm_input_allocate_device(dev);
if (!input) {
dev_err(dev, "Failed to allocate input device\n");
return -ENOMEM;
}
tsdata->client = client;
tsdata->input = input;
input->name = client->name;
input->id.bustype = BUS_I2C;
input->open = pixcir_input_open;
input->close = pixcir_input_close;
input_set_capability(input, EV_ABS, ABS_MT_POSITION_X);
input_set_capability(input, EV_ABS, ABS_MT_POSITION_Y);
touchscreen_parse_properties(input, true, &tsdata->prop);
if (!input_abs_get_max(input, ABS_MT_POSITION_X) ||
!input_abs_get_max(input, ABS_MT_POSITION_Y)) {
dev_err(dev, "Touchscreen size is not specified\n");
return -EINVAL;
}
error = input_mt_init_slots(input, tsdata->chip->max_fingers,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
if (error) {
dev_err(dev, "Error initializing Multi-Touch slots\n");
return error;
}
input_set_drvdata(input, tsdata);
tsdata->gpio_attb = devm_gpiod_get(dev, "attb", GPIOD_IN);
if (IS_ERR(tsdata->gpio_attb))
return dev_err_probe(dev, PTR_ERR(tsdata->gpio_attb),
"Failed to request ATTB gpio\n");
tsdata->gpio_reset = devm_gpiod_get_optional(dev, "reset",
GPIOD_OUT_LOW);
if (IS_ERR(tsdata->gpio_reset))
return dev_err_probe(dev, PTR_ERR(tsdata->gpio_reset),
"Failed to request RESET gpio\n");
tsdata->gpio_wake = devm_gpiod_get_optional(dev, "wake",
GPIOD_OUT_HIGH);
if (IS_ERR(tsdata->gpio_wake))
return dev_err_probe(dev, PTR_ERR(tsdata->gpio_wake),
"Failed to get wake gpio\n");
tsdata->gpio_enable = devm_gpiod_get_optional(dev, "enable",
GPIOD_OUT_HIGH);
if (IS_ERR(tsdata->gpio_enable))
return dev_err_probe(dev, PTR_ERR(tsdata->gpio_enable),
"Failed to get enable gpio\n");
if (tsdata->gpio_enable)
msleep(100);
error = devm_request_threaded_irq(dev, client->irq, NULL, pixcir_ts_isr,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
client->name, tsdata);
if (error) {
dev_err(dev, "failed to request irq %d\n", client->irq);
return error;
}
pixcir_reset(tsdata);
/* Always be in IDLE mode to save power, device supports auto wake */
error = pixcir_set_power_mode(tsdata, PIXCIR_POWER_IDLE);
if (error) {
dev_err(dev, "Failed to set IDLE mode\n");
return error;
}
/* Stop device till opened */
error = pixcir_stop(tsdata);
if (error)
return error;
error = input_register_device(input);
if (error)
return error;
i2c_set_clientdata(client, tsdata);
return 0;
}
static const struct pixcir_i2c_chip_data pixcir_ts_data = {
.max_fingers = 2,
/* no hw id support */
};
static const struct pixcir_i2c_chip_data pixcir_tangoc_data = {
.max_fingers = 5,
.has_hw_ids = true,
};
static const struct i2c_device_id pixcir_i2c_ts_id[] = {
{ "pixcir_ts", (unsigned long) &pixcir_ts_data },
{ "pixcir_tangoc", (unsigned long) &pixcir_tangoc_data },
{ }
};
MODULE_DEVICE_TABLE(i2c, pixcir_i2c_ts_id);
#ifdef CONFIG_OF
static const struct of_device_id pixcir_of_match[] = {
{ .compatible = "pixcir,pixcir_ts", .data = &pixcir_ts_data },
{ .compatible = "pixcir,pixcir_tangoc", .data = &pixcir_tangoc_data },
{ }
};
MODULE_DEVICE_TABLE(of, pixcir_of_match);
#endif
static struct i2c_driver pixcir_i2c_ts_driver = {
.driver = {
.name = "pixcir_ts",
.pm = pm_sleep_ptr(&pixcir_dev_pm_ops),
.of_match_table = of_match_ptr(pixcir_of_match),
},
.probe = pixcir_i2c_ts_probe,
.id_table = pixcir_i2c_ts_id,
};
module_i2c_driver(pixcir_i2c_ts_driver);
MODULE_AUTHOR("Jianchun Bian <[email protected]>, Dequan Meng <[email protected]>");
MODULE_DESCRIPTION("Pixcir I2C Touchscreen Driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/pixcir_i2c_ts.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Fujitsu serial touchscreen driver
*
* Copyright (c) Dmitry Torokhov <[email protected]>
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/serio.h>
#define DRIVER_DESC "Fujitsu serial touchscreen driver"
MODULE_AUTHOR("Dmitry Torokhov <[email protected]>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
#define FUJITSU_LENGTH 5
/*
* Per-touchscreen data.
*/
struct fujitsu {
struct input_dev *dev;
struct serio *serio;
int idx;
unsigned char data[FUJITSU_LENGTH];
char phys[32];
};
/*
* Decode serial data (5 bytes per packet)
* First byte
* 1 C 0 0 R S S S
* Where C is 1 while in calibration mode (which we don't use)
* R is 1 when no coordinate corection was done.
* S are button state
*/
static irqreturn_t fujitsu_interrupt(struct serio *serio,
unsigned char data, unsigned int flags)
{
struct fujitsu *fujitsu = serio_get_drvdata(serio);
struct input_dev *dev = fujitsu->dev;
if (fujitsu->idx == 0) {
/* resync skip until start of frame */
if ((data & 0xf0) != 0x80)
return IRQ_HANDLED;
} else {
/* resync skip garbage */
if (data & 0x80) {
fujitsu->idx = 0;
return IRQ_HANDLED;
}
}
fujitsu->data[fujitsu->idx++] = data;
if (fujitsu->idx == FUJITSU_LENGTH) {
input_report_abs(dev, ABS_X,
(fujitsu->data[2] << 7) | fujitsu->data[1]);
input_report_abs(dev, ABS_Y,
(fujitsu->data[4] << 7) | fujitsu->data[3]);
input_report_key(dev, BTN_TOUCH,
(fujitsu->data[0] & 0x03) != 2);
input_sync(dev);
fujitsu->idx = 0;
}
return IRQ_HANDLED;
}
/*
* fujitsu_disconnect() is the opposite of fujitsu_connect()
*/
static void fujitsu_disconnect(struct serio *serio)
{
struct fujitsu *fujitsu = serio_get_drvdata(serio);
input_get_device(fujitsu->dev);
input_unregister_device(fujitsu->dev);
serio_close(serio);
serio_set_drvdata(serio, NULL);
input_put_device(fujitsu->dev);
kfree(fujitsu);
}
/*
* fujitsu_connect() is the routine that is called when someone adds a
* new serio device that supports the Fujitsu protocol and registers it
* as input device.
*/
static int fujitsu_connect(struct serio *serio, struct serio_driver *drv)
{
struct fujitsu *fujitsu;
struct input_dev *input_dev;
int err;
fujitsu = kzalloc(sizeof(struct fujitsu), GFP_KERNEL);
input_dev = input_allocate_device();
if (!fujitsu || !input_dev) {
err = -ENOMEM;
goto fail1;
}
fujitsu->serio = serio;
fujitsu->dev = input_dev;
snprintf(fujitsu->phys, sizeof(fujitsu->phys),
"%s/input0", serio->phys);
input_dev->name = "Fujitsu Serial Touchscreen";
input_dev->phys = fujitsu->phys;
input_dev->id.bustype = BUS_RS232;
input_dev->id.vendor = SERIO_FUJITSU;
input_dev->id.product = 0;
input_dev->id.version = 0x0100;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_abs_params(input_dev, ABS_X, 0, 4096, 0, 0);
input_set_abs_params(input_dev, ABS_Y, 0, 4096, 0, 0);
serio_set_drvdata(serio, fujitsu);
err = serio_open(serio, drv);
if (err)
goto fail2;
err = input_register_device(fujitsu->dev);
if (err)
goto fail3;
return 0;
fail3:
serio_close(serio);
fail2:
serio_set_drvdata(serio, NULL);
fail1:
input_free_device(input_dev);
kfree(fujitsu);
return err;
}
/*
* The serio driver structure.
*/
static const struct serio_device_id fujitsu_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_FUJITSU,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, fujitsu_serio_ids);
static struct serio_driver fujitsu_drv = {
.driver = {
.name = "fujitsu_ts",
},
.description = DRIVER_DESC,
.id_table = fujitsu_serio_ids,
.interrupt = fujitsu_interrupt,
.connect = fujitsu_connect,
.disconnect = fujitsu_disconnect,
};
module_serio_driver(fujitsu_drv);
|
linux-master
|
drivers/input/touchscreen/fujitsu_ts.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* drivers/input/touchscreen/tsc2007.c
*
* Copyright (c) 2008 MtekVision Co., Ltd.
* Kwangwoo Lee <[email protected]>
*
* Using code from:
* - ads7846.c
* Copyright (c) 2005 David Brownell
* Copyright (c) 2006 Nokia Corporation
* - corgi_ts.c
* Copyright (C) 2004-2005 Richard Purdie
* - omap_ts.[hc], ads7846.h, ts_osk.c
* Copyright (C) 2002 MontaVista Software
* Copyright (C) 2004 Texas Instruments
* Copyright (C) 2005 Dirk Behme
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/gpio/consumer.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/mod_devicetable.h>
#include <linux/property.h>
#include <linux/platform_data/tsc2007.h>
#include "tsc2007.h"
int tsc2007_xfer(struct tsc2007 *tsc, u8 cmd)
{
s32 data;
u16 val;
data = i2c_smbus_read_word_data(tsc->client, cmd);
if (data < 0) {
dev_err(&tsc->client->dev, "i2c io error: %d\n", data);
return data;
}
/* The protocol and raw data format from i2c interface:
* S Addr Wr [A] Comm [A] S Addr Rd [A] [DataLow] A [DataHigh] NA P
* Where DataLow has [D11-D4], DataHigh has [D3-D0 << 4 | Dummy 4bit].
*/
val = swab16(data) >> 4;
dev_dbg(&tsc->client->dev, "data: 0x%x, val: 0x%x\n", data, val);
return val;
}
static void tsc2007_read_values(struct tsc2007 *tsc, struct ts_event *tc)
{
/* y- still on; turn on only y+ (and ADC) */
tc->y = tsc2007_xfer(tsc, READ_Y);
/* turn y- off, x+ on, then leave in lowpower */
tc->x = tsc2007_xfer(tsc, READ_X);
/* turn y+ off, x- on; we'll use formula #1 */
tc->z1 = tsc2007_xfer(tsc, READ_Z1);
tc->z2 = tsc2007_xfer(tsc, READ_Z2);
/* Prepare for next touch reading - power down ADC, enable PENIRQ */
tsc2007_xfer(tsc, PWRDOWN);
}
u32 tsc2007_calculate_resistance(struct tsc2007 *tsc, struct ts_event *tc)
{
u32 rt = 0;
/* range filtering */
if (tc->x == MAX_12BIT)
tc->x = 0;
if (likely(tc->x && tc->z1)) {
/* compute touch resistance using equation #1 */
rt = tc->z2 - tc->z1;
rt *= tc->x;
rt *= tsc->x_plate_ohms;
rt /= tc->z1;
rt = (rt + 2047) >> 12;
}
return rt;
}
bool tsc2007_is_pen_down(struct tsc2007 *ts)
{
/*
* NOTE: We can't rely on the pressure to determine the pen down
* state, even though this controller has a pressure sensor.
* The pressure value can fluctuate for quite a while after
* lifting the pen and in some cases may not even settle at the
* expected value.
*
* The only safe way to check for the pen up condition is in the
* work function by reading the pen signal state (it's a GPIO
* and IRQ). Unfortunately such callback is not always available,
* in that case we assume that the pen is down and expect caller
* to fall back on the pressure reading.
*/
if (!ts->get_pendown_state)
return true;
return ts->get_pendown_state(&ts->client->dev);
}
static irqreturn_t tsc2007_soft_irq(int irq, void *handle)
{
struct tsc2007 *ts = handle;
struct input_dev *input = ts->input;
struct ts_event tc;
u32 rt;
while (!ts->stopped && tsc2007_is_pen_down(ts)) {
/* pen is down, continue with the measurement */
mutex_lock(&ts->mlock);
tsc2007_read_values(ts, &tc);
mutex_unlock(&ts->mlock);
rt = tsc2007_calculate_resistance(ts, &tc);
if (!rt && !ts->get_pendown_state) {
/*
* If pressure reported is 0 and we don't have
* callback to check pendown state, we have to
* assume that pen was lifted up.
*/
break;
}
if (rt <= ts->max_rt) {
dev_dbg(&ts->client->dev,
"DOWN point(%4d,%4d), resistance (%4u)\n",
tc.x, tc.y, rt);
rt = ts->max_rt - rt;
input_report_key(input, BTN_TOUCH, 1);
input_report_abs(input, ABS_X, tc.x);
input_report_abs(input, ABS_Y, tc.y);
input_report_abs(input, ABS_PRESSURE, rt);
input_sync(input);
} else {
/*
* Sample found inconsistent by debouncing or pressure is
* beyond the maximum. Don't report it to user space,
* repeat at least once more the measurement.
*/
dev_dbg(&ts->client->dev, "ignored pressure %d\n", rt);
}
wait_event_timeout(ts->wait, ts->stopped, ts->poll_period);
}
dev_dbg(&ts->client->dev, "UP\n");
input_report_key(input, BTN_TOUCH, 0);
input_report_abs(input, ABS_PRESSURE, 0);
input_sync(input);
if (ts->clear_penirq)
ts->clear_penirq();
return IRQ_HANDLED;
}
static void tsc2007_stop(struct tsc2007 *ts)
{
ts->stopped = true;
mb();
wake_up(&ts->wait);
disable_irq(ts->irq);
}
static int tsc2007_open(struct input_dev *input_dev)
{
struct tsc2007 *ts = input_get_drvdata(input_dev);
int err;
ts->stopped = false;
mb();
enable_irq(ts->irq);
/* Prepare for touch readings - power down ADC and enable PENIRQ */
err = tsc2007_xfer(ts, PWRDOWN);
if (err < 0) {
tsc2007_stop(ts);
return err;
}
return 0;
}
static void tsc2007_close(struct input_dev *input_dev)
{
struct tsc2007 *ts = input_get_drvdata(input_dev);
tsc2007_stop(ts);
}
static int tsc2007_get_pendown_state_gpio(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct tsc2007 *ts = i2c_get_clientdata(client);
return gpiod_get_value_cansleep(ts->gpiod);
}
static int tsc2007_probe_properties(struct device *dev, struct tsc2007 *ts)
{
u32 val32;
u64 val64;
if (!device_property_read_u32(dev, "ti,max-rt", &val32))
ts->max_rt = val32;
else
ts->max_rt = MAX_12BIT;
if (!device_property_read_u32(dev, "ti,fuzzx", &val32))
ts->fuzzx = val32;
if (!device_property_read_u32(dev, "ti,fuzzy", &val32))
ts->fuzzy = val32;
if (!device_property_read_u32(dev, "ti,fuzzz", &val32))
ts->fuzzz = val32;
if (!device_property_read_u64(dev, "ti,poll-period", &val64))
ts->poll_period = msecs_to_jiffies(val64);
else
ts->poll_period = msecs_to_jiffies(1);
if (!device_property_read_u32(dev, "ti,x-plate-ohms", &val32)) {
ts->x_plate_ohms = val32;
} else {
dev_err(dev, "Missing ti,x-plate-ohms device property\n");
return -EINVAL;
}
ts->gpiod = devm_gpiod_get_optional(dev, NULL, GPIOD_IN);
if (IS_ERR(ts->gpiod))
return PTR_ERR(ts->gpiod);
if (ts->gpiod)
ts->get_pendown_state = tsc2007_get_pendown_state_gpio;
else
dev_warn(dev, "Pen down GPIO is not specified in properties\n");
return 0;
}
static int tsc2007_probe_pdev(struct device *dev, struct tsc2007 *ts,
const struct tsc2007_platform_data *pdata,
const struct i2c_device_id *id)
{
ts->model = pdata->model;
ts->x_plate_ohms = pdata->x_plate_ohms;
ts->max_rt = pdata->max_rt ? : MAX_12BIT;
ts->poll_period = msecs_to_jiffies(pdata->poll_period ? : 1);
ts->get_pendown_state = pdata->get_pendown_state;
ts->clear_penirq = pdata->clear_penirq;
ts->fuzzx = pdata->fuzzx;
ts->fuzzy = pdata->fuzzy;
ts->fuzzz = pdata->fuzzz;
if (pdata->x_plate_ohms == 0) {
dev_err(dev, "x_plate_ohms is not set up in platform data\n");
return -EINVAL;
}
return 0;
}
static void tsc2007_call_exit_platform_hw(void *data)
{
struct device *dev = data;
const struct tsc2007_platform_data *pdata = dev_get_platdata(dev);
pdata->exit_platform_hw();
}
static int tsc2007_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
const struct tsc2007_platform_data *pdata =
dev_get_platdata(&client->dev);
struct tsc2007 *ts;
struct input_dev *input_dev;
int err;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_READ_WORD_DATA))
return -EIO;
ts = devm_kzalloc(&client->dev, sizeof(struct tsc2007), GFP_KERNEL);
if (!ts)
return -ENOMEM;
if (pdata)
err = tsc2007_probe_pdev(&client->dev, ts, pdata, id);
else
err = tsc2007_probe_properties(&client->dev, ts);
if (err)
return err;
input_dev = devm_input_allocate_device(&client->dev);
if (!input_dev)
return -ENOMEM;
i2c_set_clientdata(client, ts);
ts->client = client;
ts->irq = client->irq;
ts->input = input_dev;
init_waitqueue_head(&ts->wait);
mutex_init(&ts->mlock);
snprintf(ts->phys, sizeof(ts->phys),
"%s/input0", dev_name(&client->dev));
input_dev->name = "TSC2007 Touchscreen";
input_dev->phys = ts->phys;
input_dev->id.bustype = BUS_I2C;
input_dev->open = tsc2007_open;
input_dev->close = tsc2007_close;
input_set_drvdata(input_dev, ts);
input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
input_set_abs_params(input_dev, ABS_X, 0, MAX_12BIT, ts->fuzzx, 0);
input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, ts->fuzzy, 0);
input_set_abs_params(input_dev, ABS_PRESSURE, 0, MAX_12BIT,
ts->fuzzz, 0);
if (pdata) {
if (pdata->exit_platform_hw) {
err = devm_add_action(&client->dev,
tsc2007_call_exit_platform_hw,
&client->dev);
if (err) {
dev_err(&client->dev,
"Failed to register exit_platform_hw action, %d\n",
err);
return err;
}
}
if (pdata->init_platform_hw)
pdata->init_platform_hw();
}
err = devm_request_threaded_irq(&client->dev, ts->irq,
NULL, tsc2007_soft_irq,
IRQF_ONESHOT,
client->dev.driver->name, ts);
if (err) {
dev_err(&client->dev, "Failed to request irq %d: %d\n",
ts->irq, err);
return err;
}
tsc2007_stop(ts);
/* power down the chip (TSC2007_SETUP does not ACK on I2C) */
err = tsc2007_xfer(ts, PWRDOWN);
if (err < 0) {
dev_err(&client->dev,
"Failed to setup chip: %d\n", err);
return err; /* chip does not respond */
}
err = input_register_device(input_dev);
if (err) {
dev_err(&client->dev,
"Failed to register input device: %d\n", err);
return err;
}
err = tsc2007_iio_configure(ts);
if (err) {
dev_err(&client->dev,
"Failed to register with IIO: %d\n", err);
return err;
}
return 0;
}
static const struct i2c_device_id tsc2007_idtable[] = {
{ "tsc2007", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tsc2007_idtable);
static const struct of_device_id tsc2007_of_match[] = {
{ .compatible = "ti,tsc2007" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, tsc2007_of_match);
static struct i2c_driver tsc2007_driver = {
.driver = {
.name = "tsc2007",
.of_match_table = tsc2007_of_match,
},
.id_table = tsc2007_idtable,
.probe = tsc2007_probe,
};
module_i2c_driver(tsc2007_driver);
MODULE_AUTHOR("Kwangwoo Lee <[email protected]>");
MODULE_DESCRIPTION("TSC2007 TouchScreen Driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/tsc2007_core.c
|
/*
* Touchscreen driver for the tps6507x chip.
*
* Copyright (c) 2009 RidgeRun ([email protected])
*
* Credits:
*
* Using code from tsc2007, MtekVision Co., Ltd.
*
* For licencing details see kernel-base/COPYING
*
* TPS65070, TPS65073, TPS650731, and TPS650732 support
* 10 bit touch screen interface.
*/
#include <linux/module.h>
#include <linux/workqueue.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/platform_device.h>
#include <linux/mfd/tps6507x.h>
#include <linux/input/tps6507x-ts.h>
#include <linux/delay.h>
#define TSC_DEFAULT_POLL_PERIOD 30 /* ms */
#define TPS_DEFAULT_MIN_PRESSURE 0x30
#define MAX_10BIT ((1 << 10) - 1)
#define TPS6507X_ADCONFIG_CONVERT_TS (TPS6507X_ADCONFIG_AD_ENABLE | \
TPS6507X_ADCONFIG_START_CONVERSION | \
TPS6507X_ADCONFIG_INPUT_REAL_TSC)
#define TPS6507X_ADCONFIG_POWER_DOWN_TS (TPS6507X_ADCONFIG_INPUT_REAL_TSC)
struct ts_event {
u16 x;
u16 y;
u16 pressure;
};
struct tps6507x_ts {
struct device *dev;
struct input_dev *input;
struct tps6507x_dev *mfd;
char phys[32];
struct ts_event tc;
u16 min_pressure;
bool pendown;
};
static int tps6507x_read_u8(struct tps6507x_ts *tsc, u8 reg, u8 *data)
{
return tsc->mfd->read_dev(tsc->mfd, reg, 1, data);
}
static int tps6507x_write_u8(struct tps6507x_ts *tsc, u8 reg, u8 data)
{
return tsc->mfd->write_dev(tsc->mfd, reg, 1, &data);
}
static s32 tps6507x_adc_conversion(struct tps6507x_ts *tsc,
u8 tsc_mode, u16 *value)
{
s32 ret;
u8 adc_status;
u8 result;
/* Route input signal to A/D converter */
ret = tps6507x_write_u8(tsc, TPS6507X_REG_TSCMODE, tsc_mode);
if (ret) {
dev_err(tsc->dev, "TSC mode read failed\n");
goto err;
}
/* Start A/D conversion */
ret = tps6507x_write_u8(tsc, TPS6507X_REG_ADCONFIG,
TPS6507X_ADCONFIG_CONVERT_TS);
if (ret) {
dev_err(tsc->dev, "ADC config write failed\n");
return ret;
}
do {
ret = tps6507x_read_u8(tsc, TPS6507X_REG_ADCONFIG,
&adc_status);
if (ret) {
dev_err(tsc->dev, "ADC config read failed\n");
goto err;
}
} while (adc_status & TPS6507X_ADCONFIG_START_CONVERSION);
ret = tps6507x_read_u8(tsc, TPS6507X_REG_ADRESULT_2, &result);
if (ret) {
dev_err(tsc->dev, "ADC result 2 read failed\n");
goto err;
}
*value = (result & TPS6507X_REG_ADRESULT_2_MASK) << 8;
ret = tps6507x_read_u8(tsc, TPS6507X_REG_ADRESULT_1, &result);
if (ret) {
dev_err(tsc->dev, "ADC result 1 read failed\n");
goto err;
}
*value |= result;
dev_dbg(tsc->dev, "TSC channel %d = 0x%X\n", tsc_mode, *value);
err:
return ret;
}
/* Need to call tps6507x_adc_standby() after using A/D converter for the
* touch screen interrupt to work properly.
*/
static s32 tps6507x_adc_standby(struct tps6507x_ts *tsc)
{
s32 ret;
u8 val;
ret = tps6507x_write_u8(tsc, TPS6507X_REG_ADCONFIG,
TPS6507X_ADCONFIG_INPUT_TSC);
if (ret)
return ret;
ret = tps6507x_write_u8(tsc, TPS6507X_REG_TSCMODE,
TPS6507X_TSCMODE_STANDBY);
if (ret)
return ret;
ret = tps6507x_read_u8(tsc, TPS6507X_REG_INT, &val);
if (ret)
return ret;
while (val & TPS6507X_REG_TSC_INT) {
mdelay(10);
ret = tps6507x_read_u8(tsc, TPS6507X_REG_INT, &val);
if (ret)
return ret;
}
return ret;
}
static void tps6507x_ts_poll(struct input_dev *input_dev)
{
struct tps6507x_ts *tsc = input_get_drvdata(input_dev);
bool pendown;
s32 ret;
ret = tps6507x_adc_conversion(tsc, TPS6507X_TSCMODE_PRESSURE,
&tsc->tc.pressure);
if (ret)
goto done;
pendown = tsc->tc.pressure > tsc->min_pressure;
if (unlikely(!pendown && tsc->pendown)) {
dev_dbg(tsc->dev, "UP\n");
input_report_key(input_dev, BTN_TOUCH, 0);
input_report_abs(input_dev, ABS_PRESSURE, 0);
input_sync(input_dev);
tsc->pendown = false;
}
if (pendown) {
if (!tsc->pendown) {
dev_dbg(tsc->dev, "DOWN\n");
input_report_key(input_dev, BTN_TOUCH, 1);
} else
dev_dbg(tsc->dev, "still down\n");
ret = tps6507x_adc_conversion(tsc, TPS6507X_TSCMODE_X_POSITION,
&tsc->tc.x);
if (ret)
goto done;
ret = tps6507x_adc_conversion(tsc, TPS6507X_TSCMODE_Y_POSITION,
&tsc->tc.y);
if (ret)
goto done;
input_report_abs(input_dev, ABS_X, tsc->tc.x);
input_report_abs(input_dev, ABS_Y, tsc->tc.y);
input_report_abs(input_dev, ABS_PRESSURE, tsc->tc.pressure);
input_sync(input_dev);
tsc->pendown = true;
}
done:
tps6507x_adc_standby(tsc);
}
static int tps6507x_ts_probe(struct platform_device *pdev)
{
struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
const struct tps6507x_board *tps_board;
const struct touchscreen_init_data *init_data;
struct tps6507x_ts *tsc;
struct input_dev *input_dev;
int error;
/*
* tps_board points to pmic related constants
* coming from the board-evm file.
*/
tps_board = dev_get_platdata(tps6507x_dev->dev);
if (!tps_board) {
dev_err(tps6507x_dev->dev,
"Could not find tps6507x platform data\n");
return -ENODEV;
}
/*
* init_data points to array of regulator_init structures
* coming from the board-evm file.
*/
init_data = tps_board->tps6507x_ts_init_data;
tsc = devm_kzalloc(&pdev->dev, sizeof(struct tps6507x_ts), GFP_KERNEL);
if (!tsc) {
dev_err(tps6507x_dev->dev, "failed to allocate driver data\n");
return -ENOMEM;
}
tsc->mfd = tps6507x_dev;
tsc->dev = tps6507x_dev->dev;
tsc->min_pressure = init_data ?
init_data->min_pressure : TPS_DEFAULT_MIN_PRESSURE;
snprintf(tsc->phys, sizeof(tsc->phys),
"%s/input0", dev_name(tsc->dev));
input_dev = devm_input_allocate_device(&pdev->dev);
if (!input_dev) {
dev_err(tsc->dev, "Failed to allocate polled input device.\n");
return -ENOMEM;
}
tsc->input = input_dev;
input_set_drvdata(input_dev, tsc);
input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
input_set_abs_params(input_dev, ABS_X, 0, MAX_10BIT, 0, 0);
input_set_abs_params(input_dev, ABS_Y, 0, MAX_10BIT, 0, 0);
input_set_abs_params(input_dev, ABS_PRESSURE, 0, MAX_10BIT, 0, 0);
input_dev->name = "TPS6507x Touchscreen";
input_dev->phys = tsc->phys;
input_dev->dev.parent = tsc->dev;
input_dev->id.bustype = BUS_I2C;
if (init_data) {
input_dev->id.vendor = init_data->vendor;
input_dev->id.product = init_data->product;
input_dev->id.version = init_data->version;
}
error = tps6507x_adc_standby(tsc);
if (error)
return error;
error = input_setup_polling(input_dev, tps6507x_ts_poll);
if (error)
return error;
input_set_poll_interval(input_dev,
init_data ? init_data->poll_period :
TSC_DEFAULT_POLL_PERIOD);
error = input_register_device(input_dev);
if (error)
return error;
return 0;
}
static struct platform_driver tps6507x_ts_driver = {
.driver = {
.name = "tps6507x-ts",
},
.probe = tps6507x_ts_probe,
};
module_platform_driver(tps6507x_ts_driver);
MODULE_AUTHOR("Todd Fischer <[email protected]>");
MODULE_DESCRIPTION("TPS6507x - TouchScreen driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:tps6507x-ts");
|
linux-master
|
drivers/input/touchscreen/tps6507x-ts.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/******************************************************************************
* usbtouchscreen.c
* Driver for USB Touchscreens, supporting those devices:
* - eGalax Touchkit
* includes eTurboTouch CT-410/510/700
* - 3M/Microtouch EX II series
* - ITM
* - PanJit TouchSet
* - eTurboTouch
* - Gunze AHL61
* - DMC TSC-10/25
* - IRTOUCHSYSTEMS/UNITOP
* - IdealTEK URTC1000
* - General Touch
* - GoTop Super_Q2/GogoPen/PenPower tablets
* - JASTEC USB touch controller/DigiTech DTR-02U
* - Zytronic capacitive touchscreen
* - NEXIO/iNexio
* - Elo TouchSystems 2700 IntelliTouch
* - EasyTouch USB Dual/Multi touch controller from Data Modul
*
* Copyright (C) 2004-2007 by Daniel Ritz <[email protected]>
* Copyright (C) by Todd E. Johnson (mtouchusb.c)
*
* Driver is based on touchkitusb.c
* - ITM parts are from itmtouch.c
* - 3M parts are from mtouchusb.c
* - PanJit parts are from an unmerged driver by Lanslott Gish
* - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
* driver from Marius Vollmer
*
*****************************************************************************/
//#define DEBUG
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/input.h>
#include <linux/hid.h>
#include <linux/mutex.h>
static bool swap_xy;
module_param(swap_xy, bool, 0644);
MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
static bool hwcalib_xy;
module_param(hwcalib_xy, bool, 0644);
MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
/* device specifc data/functions */
struct usbtouch_usb;
struct usbtouch_device_info {
int min_xc, max_xc;
int min_yc, max_yc;
int min_press, max_press;
int rept_size;
/*
* Always service the USB devices irq not just when the input device is
* open. This is useful when devices have a watchdog which prevents us
* from periodically polling the device. Leave this unset unless your
* touchscreen device requires it, as it does consume more of the USB
* bandwidth.
*/
bool irq_always;
void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
/*
* used to get the packet len. possible return values:
* > 0: packet len
* = 0: skip one byte
* < 0: -return value more bytes needed
*/
int (*get_pkt_len) (unsigned char *pkt, int len);
int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
int (*alloc) (struct usbtouch_usb *usbtouch);
int (*init) (struct usbtouch_usb *usbtouch);
void (*exit) (struct usbtouch_usb *usbtouch);
};
/* a usbtouch device */
struct usbtouch_usb {
unsigned char *data;
dma_addr_t data_dma;
int data_size;
unsigned char *buffer;
int buf_len;
struct urb *irq;
struct usb_interface *interface;
struct input_dev *input;
struct usbtouch_device_info *type;
struct mutex pm_mutex; /* serialize access to open/suspend */
bool is_open;
char name[128];
char phys[64];
void *priv;
int x, y;
int touch, press;
};
/* device types */
enum {
DEVTYPE_IGNORE = -1,
DEVTYPE_EGALAX,
DEVTYPE_PANJIT,
DEVTYPE_3M,
DEVTYPE_ITM,
DEVTYPE_ETURBO,
DEVTYPE_GUNZE,
DEVTYPE_DMC_TSC10,
DEVTYPE_IRTOUCH,
DEVTYPE_IRTOUCH_HIRES,
DEVTYPE_IDEALTEK,
DEVTYPE_GENERAL_TOUCH,
DEVTYPE_GOTOP,
DEVTYPE_JASTEC,
DEVTYPE_E2I,
DEVTYPE_ZYTRONIC,
DEVTYPE_TC45USB,
DEVTYPE_NEXIO,
DEVTYPE_ELO,
DEVTYPE_ETOUCH,
};
#define USB_DEVICE_HID_CLASS(vend, prod) \
.match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
| USB_DEVICE_ID_MATCH_DEVICE, \
.idVendor = (vend), \
.idProduct = (prod), \
.bInterfaceClass = USB_INTERFACE_CLASS_HID
static const struct usb_device_id usbtouch_devices[] = {
#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
/* ignore the HID capable devices, handled by usbhid */
{USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
{USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
/* normal device IDs */
{USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
{USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
{USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
{USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
{USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
{USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
{USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
{USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
{USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
{USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
{USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_3M
{USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ITM
{USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
{USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
{USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
{USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
{USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
{USB_DEVICE(0x255e, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
{USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
{USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
{USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
{USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
{USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
{USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
{USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
{USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
{USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_E2I
{USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
{USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
/* TC5UH */
{USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
/* TC4UM */
{USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
/* data interface only */
{USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
.driver_info = DEVTYPE_NEXIO},
{USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
.driver_info = DEVTYPE_NEXIO},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ELO
{USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
{USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
#endif
{}
};
/*****************************************************************************
* e2i Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_E2I
static int e2i_init(struct usbtouch_usb *usbtouch)
{
int ret;
struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x01, 0x02, 0x0000, 0x0081,
NULL, 0, USB_CTRL_SET_TIMEOUT);
dev_dbg(&usbtouch->interface->dev,
"%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
__func__, ret);
return ret;
}
static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
int tmp = (pkt[0] << 8) | pkt[1];
dev->x = (pkt[2] << 8) | pkt[3];
dev->y = (pkt[4] << 8) | pkt[5];
tmp = tmp - 0xA000;
dev->touch = (tmp > 0);
dev->press = (tmp > 0 ? tmp : 0);
return 1;
}
#endif
/*****************************************************************************
* eGalax part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
#ifndef MULTI_PACKET
#define MULTI_PACKET
#endif
#define EGALAX_PKT_TYPE_MASK 0xFE
#define EGALAX_PKT_TYPE_REPT 0x80
#define EGALAX_PKT_TYPE_DIAG 0x0A
static int egalax_init(struct usbtouch_usb *usbtouch)
{
int ret, i;
unsigned char *buf;
struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
/*
* An eGalax diagnostic packet kicks the device into using the right
* protocol. We send a "check active" packet. The response will be
* read later and ignored.
*/
buf = kmalloc(3, GFP_KERNEL);
if (!buf)
return -ENOMEM;
buf[0] = EGALAX_PKT_TYPE_DIAG;
buf[1] = 1; /* length */
buf[2] = 'A'; /* command - check active */
for (i = 0; i < 3; i++) {
ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, 0, buf, 3,
USB_CTRL_SET_TIMEOUT);
if (ret >= 0) {
ret = 0;
break;
}
if (ret != -EPIPE)
break;
}
kfree(buf);
return ret;
}
static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
return 0;
dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
dev->touch = pkt[0] & 0x01;
return 1;
}
static int egalax_get_pkt_len(unsigned char *buf, int len)
{
switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
case EGALAX_PKT_TYPE_REPT:
return 5;
case EGALAX_PKT_TYPE_DIAG:
if (len < 2)
return -1;
return buf[1] + 2;
}
return 0;
}
#endif
/*****************************************************************************
* EasyTouch part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
#ifndef MULTI_PACKET
#define MULTI_PACKET
#endif
#define ETOUCH_PKT_TYPE_MASK 0xFE
#define ETOUCH_PKT_TYPE_REPT 0x80
#define ETOUCH_PKT_TYPE_REPT2 0xB0
#define ETOUCH_PKT_TYPE_DIAG 0x0A
static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
(pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
return 0;
dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
dev->touch = pkt[0] & 0x01;
return 1;
}
static int etouch_get_pkt_len(unsigned char *buf, int len)
{
switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
case ETOUCH_PKT_TYPE_REPT:
case ETOUCH_PKT_TYPE_REPT2:
return 5;
case ETOUCH_PKT_TYPE_DIAG:
if (len < 2)
return -1;
return buf[1] + 2;
}
return 0;
}
#endif
/*****************************************************************************
* PanJit Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
dev->touch = pkt[0] & 0x01;
return 1;
}
#endif
/*****************************************************************************
* 3M/Microtouch Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_3M
#define MTOUCHUSB_ASYNC_REPORT 1
#define MTOUCHUSB_RESET 7
#define MTOUCHUSB_REQ_CTRLLR_ID 10
#define MTOUCHUSB_REQ_CTRLLR_ID_LEN 16
static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
if (hwcalib_xy) {
dev->x = (pkt[4] << 8) | pkt[3];
dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
} else {
dev->x = (pkt[8] << 8) | pkt[7];
dev->y = (pkt[10] << 8) | pkt[9];
}
dev->touch = (pkt[2] & 0x40) ? 1 : 0;
return 1;
}
struct mtouch_priv {
u8 fw_rev_major;
u8 fw_rev_minor;
};
static ssize_t mtouch_firmware_rev_show(struct device *dev,
struct device_attribute *attr, char *output)
{
struct usb_interface *intf = to_usb_interface(dev);
struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
struct mtouch_priv *priv = usbtouch->priv;
return scnprintf(output, PAGE_SIZE, "%1x.%1x\n",
priv->fw_rev_major, priv->fw_rev_minor);
}
static DEVICE_ATTR(firmware_rev, 0444, mtouch_firmware_rev_show, NULL);
static struct attribute *mtouch_attrs[] = {
&dev_attr_firmware_rev.attr,
NULL
};
static const struct attribute_group mtouch_attr_group = {
.attrs = mtouch_attrs,
};
static int mtouch_get_fw_revision(struct usbtouch_usb *usbtouch)
{
struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
struct mtouch_priv *priv = usbtouch->priv;
u8 *buf;
int ret;
buf = kzalloc(MTOUCHUSB_REQ_CTRLLR_ID_LEN, GFP_NOIO);
if (!buf)
return -ENOMEM;
ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
MTOUCHUSB_REQ_CTRLLR_ID,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, 0, buf, MTOUCHUSB_REQ_CTRLLR_ID_LEN,
USB_CTRL_SET_TIMEOUT);
if (ret != MTOUCHUSB_REQ_CTRLLR_ID_LEN) {
dev_warn(&usbtouch->interface->dev,
"Failed to read FW rev: %d\n", ret);
ret = ret < 0 ? ret : -EIO;
goto free;
}
priv->fw_rev_major = buf[3];
priv->fw_rev_minor = buf[4];
ret = 0;
free:
kfree(buf);
return ret;
}
static int mtouch_alloc(struct usbtouch_usb *usbtouch)
{
int ret;
usbtouch->priv = kmalloc(sizeof(struct mtouch_priv), GFP_KERNEL);
if (!usbtouch->priv)
return -ENOMEM;
ret = sysfs_create_group(&usbtouch->interface->dev.kobj,
&mtouch_attr_group);
if (ret) {
kfree(usbtouch->priv);
usbtouch->priv = NULL;
return ret;
}
return 0;
}
static int mtouch_init(struct usbtouch_usb *usbtouch)
{
int ret, i;
struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
ret = mtouch_get_fw_revision(usbtouch);
if (ret)
return ret;
ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
MTOUCHUSB_RESET,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
dev_dbg(&usbtouch->interface->dev,
"%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
__func__, ret);
if (ret < 0)
return ret;
msleep(150);
for (i = 0; i < 3; i++) {
ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
MTOUCHUSB_ASYNC_REPORT,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
dev_dbg(&usbtouch->interface->dev,
"%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
__func__, ret);
if (ret >= 0)
break;
if (ret != -EPIPE)
return ret;
}
/* Default min/max xy are the raw values, override if using hw-calib */
if (hwcalib_xy) {
input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
}
return 0;
}
static void mtouch_exit(struct usbtouch_usb *usbtouch)
{
struct mtouch_priv *priv = usbtouch->priv;
sysfs_remove_group(&usbtouch->interface->dev.kobj, &mtouch_attr_group);
kfree(priv);
}
#endif
/*****************************************************************************
* ITM Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_ITM
static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
int touch;
/*
* ITM devices report invalid x/y data if not touched.
* if the screen was touched before but is not touched any more
* report touch as 0 with the last valid x/y data once. then stop
* reporting data until touched again.
*/
dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
touch = ~pkt[7] & 0x20;
if (!touch) {
if (dev->touch) {
dev->touch = 0;
return 1;
}
return 0;
}
dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
dev->touch = touch;
return 1;
}
#endif
/*****************************************************************************
* eTurboTouch part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
#ifndef MULTI_PACKET
#define MULTI_PACKET
#endif
static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
unsigned int shift;
/* packets should start with sync */
if (!(pkt[0] & 0x80))
return 0;
shift = (6 - (pkt[0] & 0x03));
dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
dev->touch = (pkt[0] & 0x10) ? 1 : 0;
return 1;
}
static int eturbo_get_pkt_len(unsigned char *buf, int len)
{
if (buf[0] & 0x80)
return 5;
if (buf[0] == 0x01)
return 3;
return 0;
}
#endif
/*****************************************************************************
* Gunze part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
return 0;
dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
dev->touch = pkt[0] & 0x20;
return 1;
}
#endif
/*****************************************************************************
* DMC TSC-10/25 Part
*
* Documentation about the controller and it's protocol can be found at
* http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
* http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
*/
#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
/* supported data rates. currently using 130 */
#define TSC10_RATE_POINT 0x50
#define TSC10_RATE_30 0x40
#define TSC10_RATE_50 0x41
#define TSC10_RATE_80 0x42
#define TSC10_RATE_100 0x43
#define TSC10_RATE_130 0x44
#define TSC10_RATE_150 0x45
/* commands */
#define TSC10_CMD_RESET 0x55
#define TSC10_CMD_RATE 0x05
#define TSC10_CMD_DATA1 0x01
static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
{
struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
int ret = -ENOMEM;
unsigned char *buf;
buf = kmalloc(2, GFP_NOIO);
if (!buf)
goto err_nobuf;
/* reset */
buf[0] = buf[1] = 0xFF;
ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
TSC10_CMD_RESET,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
if (ret < 0)
goto err_out;
if (buf[0] != 0x06) {
ret = -ENODEV;
goto err_out;
}
/* TSC-25 data sheet specifies a delay after the RESET command */
msleep(150);
/* set coordinate output rate */
buf[0] = buf[1] = 0xFF;
ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
TSC10_CMD_RATE,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
if (ret < 0)
goto err_out;
if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
ret = -ENODEV;
goto err_out;
}
/* start sending data */
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
TSC10_CMD_DATA1,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
err_out:
kfree(buf);
err_nobuf:
return ret;
}
static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
dev->touch = pkt[0] & 0x01;
return 1;
}
#endif
/*****************************************************************************
* IRTOUCH Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
dev->x = (pkt[3] << 8) | pkt[2];
dev->y = (pkt[5] << 8) | pkt[4];
dev->touch = (pkt[1] & 0x03) ? 1 : 0;
return 1;
}
#endif
/*****************************************************************************
* ET&T TC5UH/TC4UM part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
dev->touch = pkt[0] & 0x01;
return 1;
}
#endif
/*****************************************************************************
* IdealTEK URTC1000 Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
#ifndef MULTI_PACKET
#define MULTI_PACKET
#endif
static int idealtek_get_pkt_len(unsigned char *buf, int len)
{
if (buf[0] & 0x80)
return 5;
if (buf[0] == 0x01)
return len;
return 0;
}
static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
switch (pkt[0] & 0x98) {
case 0x88:
/* touch data in IdealTEK mode */
dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
dev->touch = (pkt[0] & 0x40) ? 1 : 0;
return 1;
case 0x98:
/* touch data in MT emulation mode */
dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
dev->touch = (pkt[0] & 0x40) ? 1 : 0;
return 1;
default:
return 0;
}
}
#endif
/*****************************************************************************
* General Touch Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
dev->x = (pkt[2] << 8) | pkt[1];
dev->y = (pkt[4] << 8) | pkt[3];
dev->press = pkt[5] & 0xff;
dev->touch = pkt[0] & 0x01;
return 1;
}
#endif
/*****************************************************************************
* GoTop Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
dev->touch = pkt[0] & 0x01;
return 1;
}
#endif
/*****************************************************************************
* JASTEC Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
dev->touch = (pkt[0] & 0x40) >> 6;
return 1;
}
#endif
/*****************************************************************************
* Zytronic Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
struct usb_interface *intf = dev->interface;
switch (pkt[0]) {
case 0x3A: /* command response */
dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
break;
case 0xC0: /* down */
dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
dev->touch = 1;
dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
return 1;
case 0x80: /* up */
dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
dev->touch = 0;
dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
return 1;
default:
dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
break;
}
return 0;
}
#endif
/*****************************************************************************
* NEXIO Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
#define NEXIO_TIMEOUT 5000
#define NEXIO_BUFSIZE 1024
#define NEXIO_THRESHOLD 50
struct nexio_priv {
struct urb *ack;
unsigned char *ack_buf;
};
struct nexio_touch_packet {
u8 flags; /* 0xe1 = touch, 0xe1 = release */
__be16 data_len; /* total bytes of touch data */
__be16 x_len; /* bytes for X axis */
__be16 y_len; /* bytes for Y axis */
u8 data[];
} __attribute__ ((packed));
static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
static void nexio_ack_complete(struct urb *urb)
{
}
static int nexio_alloc(struct usbtouch_usb *usbtouch)
{
struct nexio_priv *priv;
int ret = -ENOMEM;
usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
if (!usbtouch->priv)
goto out_buf;
priv = usbtouch->priv;
priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
GFP_KERNEL);
if (!priv->ack_buf)
goto err_priv;
priv->ack = usb_alloc_urb(0, GFP_KERNEL);
if (!priv->ack) {
dev_dbg(&usbtouch->interface->dev,
"%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
goto err_ack_buf;
}
return 0;
err_ack_buf:
kfree(priv->ack_buf);
err_priv:
kfree(priv);
out_buf:
return ret;
}
static int nexio_init(struct usbtouch_usb *usbtouch)
{
struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
struct nexio_priv *priv = usbtouch->priv;
int ret = -ENOMEM;
int actual_len, i;
unsigned char *buf;
char *firmware_ver = NULL, *device_name = NULL;
int input_ep = 0, output_ep = 0;
/* find first input and output endpoint */
for (i = 0; i < interface->desc.bNumEndpoints; i++) {
if (!input_ep &&
usb_endpoint_dir_in(&interface->endpoint[i].desc))
input_ep = interface->endpoint[i].desc.bEndpointAddress;
if (!output_ep &&
usb_endpoint_dir_out(&interface->endpoint[i].desc))
output_ep = interface->endpoint[i].desc.bEndpointAddress;
}
if (!input_ep || !output_ep)
return -ENXIO;
buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
if (!buf)
goto out_buf;
/* two empty reads */
for (i = 0; i < 2; i++) {
ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
buf, NEXIO_BUFSIZE, &actual_len,
NEXIO_TIMEOUT);
if (ret < 0)
goto out_buf;
}
/* send init command */
memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
buf, sizeof(nexio_init_pkt), &actual_len,
NEXIO_TIMEOUT);
if (ret < 0)
goto out_buf;
/* read replies */
for (i = 0; i < 3; i++) {
memset(buf, 0, NEXIO_BUFSIZE);
ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
buf, NEXIO_BUFSIZE, &actual_len,
NEXIO_TIMEOUT);
if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
continue;
switch (buf[0]) {
case 0x83: /* firmware version */
if (!firmware_ver)
firmware_ver = kstrdup(&buf[2], GFP_NOIO);
break;
case 0x84: /* device name */
if (!device_name)
device_name = kstrdup(&buf[2], GFP_NOIO);
break;
}
}
printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
device_name, firmware_ver);
kfree(firmware_ver);
kfree(device_name);
usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
priv->ack_buf, sizeof(nexio_ack_pkt),
nexio_ack_complete, usbtouch);
ret = 0;
out_buf:
kfree(buf);
return ret;
}
static void nexio_exit(struct usbtouch_usb *usbtouch)
{
struct nexio_priv *priv = usbtouch->priv;
usb_kill_urb(priv->ack);
usb_free_urb(priv->ack);
kfree(priv->ack_buf);
kfree(priv);
}
static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
{
struct device *dev = &usbtouch->interface->dev;
struct nexio_touch_packet *packet = (void *) pkt;
struct nexio_priv *priv = usbtouch->priv;
unsigned int data_len = be16_to_cpu(packet->data_len);
unsigned int x_len = be16_to_cpu(packet->x_len);
unsigned int y_len = be16_to_cpu(packet->y_len);
int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
/* got touch data? */
if ((pkt[0] & 0xe0) != 0xe0)
return 0;
if (data_len > 0xff)
data_len -= 0x100;
if (x_len > 0xff)
x_len -= 0x80;
/* send ACK */
ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
if (ret)
dev_warn(dev, "Failed to submit ACK URB: %d\n", ret);
if (!usbtouch->type->max_xc) {
usbtouch->type->max_xc = 2 * x_len;
input_set_abs_params(usbtouch->input, ABS_X,
0, usbtouch->type->max_xc, 0, 0);
usbtouch->type->max_yc = 2 * y_len;
input_set_abs_params(usbtouch->input, ABS_Y,
0, usbtouch->type->max_yc, 0, 0);
}
/*
* The device reports state of IR sensors on X and Y axes.
* Each byte represents "darkness" percentage (0-100) of one element.
* 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
* This also means that there's a limited multi-touch capability but
* it's disabled (and untested) here as there's no X driver for that.
*/
begin_x = end_x = begin_y = end_y = -1;
for (x = 0; x < x_len; x++) {
if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
begin_x = x;
continue;
}
if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
end_x = x - 1;
for (y = x_len; y < data_len; y++) {
if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
begin_y = y - x_len;
continue;
}
if (end_y == -1 &&
begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
end_y = y - 1 - x_len;
w = end_x - begin_x;
h = end_y - begin_y;
#if 0
/* multi-touch */
input_report_abs(usbtouch->input,
ABS_MT_TOUCH_MAJOR, max(w,h));
input_report_abs(usbtouch->input,
ABS_MT_TOUCH_MINOR, min(x,h));
input_report_abs(usbtouch->input,
ABS_MT_POSITION_X, 2*begin_x+w);
input_report_abs(usbtouch->input,
ABS_MT_POSITION_Y, 2*begin_y+h);
input_report_abs(usbtouch->input,
ABS_MT_ORIENTATION, w > h);
input_mt_sync(usbtouch->input);
#endif
/* single touch */
usbtouch->x = 2 * begin_x + w;
usbtouch->y = 2 * begin_y + h;
usbtouch->touch = packet->flags & 0x01;
begin_y = end_y = -1;
return 1;
}
}
begin_x = end_x = -1;
}
}
return 0;
}
#endif
/*****************************************************************************
* ELO part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_ELO
static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
dev->x = (pkt[3] << 8) | pkt[2];
dev->y = (pkt[5] << 8) | pkt[4];
dev->touch = pkt[6] > 0;
dev->press = pkt[6];
return 1;
}
#endif
/*****************************************************************************
* the different device descriptors
*/
#ifdef MULTI_PACKET
static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
unsigned char *pkt, int len);
#endif
static struct usbtouch_device_info usbtouch_dev_info[] = {
#ifdef CONFIG_TOUCHSCREEN_USB_ELO
[DEVTYPE_ELO] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.max_press = 0xff,
.rept_size = 8,
.read_data = elo_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
[DEVTYPE_EGALAX] = {
.min_xc = 0x0,
.max_xc = 0x07ff,
.min_yc = 0x0,
.max_yc = 0x07ff,
.rept_size = 16,
.process_pkt = usbtouch_process_multi,
.get_pkt_len = egalax_get_pkt_len,
.read_data = egalax_read_data,
.init = egalax_init,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
[DEVTYPE_PANJIT] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.rept_size = 8,
.read_data = panjit_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_3M
[DEVTYPE_3M] = {
.min_xc = 0x0,
.max_xc = 0x4000,
.min_yc = 0x0,
.max_yc = 0x4000,
.rept_size = 11,
.read_data = mtouch_read_data,
.alloc = mtouch_alloc,
.init = mtouch_init,
.exit = mtouch_exit,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ITM
[DEVTYPE_ITM] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.max_press = 0xff,
.rept_size = 8,
.read_data = itm_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
[DEVTYPE_ETURBO] = {
.min_xc = 0x0,
.max_xc = 0x07ff,
.min_yc = 0x0,
.max_yc = 0x07ff,
.rept_size = 8,
.process_pkt = usbtouch_process_multi,
.get_pkt_len = eturbo_get_pkt_len,
.read_data = eturbo_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
[DEVTYPE_GUNZE] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.rept_size = 4,
.read_data = gunze_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
[DEVTYPE_DMC_TSC10] = {
.min_xc = 0x0,
.max_xc = 0x03ff,
.min_yc = 0x0,
.max_yc = 0x03ff,
.rept_size = 5,
.init = dmc_tsc10_init,
.read_data = dmc_tsc10_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
[DEVTYPE_IRTOUCH] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.rept_size = 8,
.read_data = irtouch_read_data,
},
[DEVTYPE_IRTOUCH_HIRES] = {
.min_xc = 0x0,
.max_xc = 0x7fff,
.min_yc = 0x0,
.max_yc = 0x7fff,
.rept_size = 8,
.read_data = irtouch_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
[DEVTYPE_IDEALTEK] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.rept_size = 8,
.process_pkt = usbtouch_process_multi,
.get_pkt_len = idealtek_get_pkt_len,
.read_data = idealtek_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
[DEVTYPE_GENERAL_TOUCH] = {
.min_xc = 0x0,
.max_xc = 0x7fff,
.min_yc = 0x0,
.max_yc = 0x7fff,
.rept_size = 7,
.read_data = general_touch_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
[DEVTYPE_GOTOP] = {
.min_xc = 0x0,
.max_xc = 0x03ff,
.min_yc = 0x0,
.max_yc = 0x03ff,
.rept_size = 4,
.read_data = gotop_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
[DEVTYPE_JASTEC] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.rept_size = 4,
.read_data = jastec_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_E2I
[DEVTYPE_E2I] = {
.min_xc = 0x0,
.max_xc = 0x7fff,
.min_yc = 0x0,
.max_yc = 0x7fff,
.rept_size = 6,
.init = e2i_init,
.read_data = e2i_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
[DEVTYPE_ZYTRONIC] = {
.min_xc = 0x0,
.max_xc = 0x03ff,
.min_yc = 0x0,
.max_yc = 0x03ff,
.rept_size = 5,
.read_data = zytronic_read_data,
.irq_always = true,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
[DEVTYPE_TC45USB] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.rept_size = 5,
.read_data = tc45usb_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
[DEVTYPE_NEXIO] = {
.rept_size = 1024,
.irq_always = true,
.read_data = nexio_read_data,
.alloc = nexio_alloc,
.init = nexio_init,
.exit = nexio_exit,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
[DEVTYPE_ETOUCH] = {
.min_xc = 0x0,
.max_xc = 0x07ff,
.min_yc = 0x0,
.max_yc = 0x07ff,
.rept_size = 16,
.process_pkt = usbtouch_process_multi,
.get_pkt_len = etouch_get_pkt_len,
.read_data = etouch_read_data,
},
#endif
};
/*****************************************************************************
* Generic Part
*/
static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
unsigned char *pkt, int len)
{
struct usbtouch_device_info *type = usbtouch->type;
if (!type->read_data(usbtouch, pkt))
return;
input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
if (swap_xy) {
input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
} else {
input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
}
if (type->max_press)
input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
input_sync(usbtouch->input);
}
#ifdef MULTI_PACKET
static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
unsigned char *pkt, int len)
{
unsigned char *buffer;
int pkt_len, pos, buf_len, tmp;
/* process buffer */
if (unlikely(usbtouch->buf_len)) {
/* try to get size */
pkt_len = usbtouch->type->get_pkt_len(
usbtouch->buffer, usbtouch->buf_len);
/* drop? */
if (unlikely(!pkt_len))
goto out_flush_buf;
/* need to append -pkt_len bytes before able to get size */
if (unlikely(pkt_len < 0)) {
int append = -pkt_len;
if (unlikely(append > len))
append = len;
if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
goto out_flush_buf;
memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
usbtouch->buf_len += append;
pkt_len = usbtouch->type->get_pkt_len(
usbtouch->buffer, usbtouch->buf_len);
if (pkt_len < 0)
return;
}
/* append */
tmp = pkt_len - usbtouch->buf_len;
if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
goto out_flush_buf;
memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
buffer = pkt + tmp;
buf_len = len - tmp;
} else {
buffer = pkt;
buf_len = len;
}
/* loop over the received packet, process */
pos = 0;
while (pos < buf_len) {
/* get packet len */
pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
buf_len - pos);
/* unknown packet: skip one byte */
if (unlikely(!pkt_len)) {
pos++;
continue;
}
/* full packet: process */
if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
} else {
/* incomplete packet: save in buffer */
memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
usbtouch->buf_len = buf_len - pos;
return;
}
pos += pkt_len;
}
out_flush_buf:
usbtouch->buf_len = 0;
return;
}
#endif
static void usbtouch_irq(struct urb *urb)
{
struct usbtouch_usb *usbtouch = urb->context;
struct device *dev = &usbtouch->interface->dev;
int retval;
switch (urb->status) {
case 0:
/* success */
break;
case -ETIME:
/* this urb is timing out */
dev_dbg(dev,
"%s - urb timed out - was the device unplugged?\n",
__func__);
return;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
case -EPIPE:
/* this urb is terminated, clean up */
dev_dbg(dev, "%s - urb shutting down with status: %d\n",
__func__, urb->status);
return;
default:
dev_dbg(dev, "%s - nonzero urb status received: %d\n",
__func__, urb->status);
goto exit;
}
usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
exit:
usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
retval = usb_submit_urb(urb, GFP_ATOMIC);
if (retval)
dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
__func__, retval);
}
static int usbtouch_open(struct input_dev *input)
{
struct usbtouch_usb *usbtouch = input_get_drvdata(input);
int r;
usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
if (r < 0)
goto out;
mutex_lock(&usbtouch->pm_mutex);
if (!usbtouch->type->irq_always) {
if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
r = -EIO;
goto out_put;
}
}
usbtouch->interface->needs_remote_wakeup = 1;
usbtouch->is_open = true;
out_put:
mutex_unlock(&usbtouch->pm_mutex);
usb_autopm_put_interface(usbtouch->interface);
out:
return r;
}
static void usbtouch_close(struct input_dev *input)
{
struct usbtouch_usb *usbtouch = input_get_drvdata(input);
int r;
mutex_lock(&usbtouch->pm_mutex);
if (!usbtouch->type->irq_always)
usb_kill_urb(usbtouch->irq);
usbtouch->is_open = false;
mutex_unlock(&usbtouch->pm_mutex);
r = usb_autopm_get_interface(usbtouch->interface);
usbtouch->interface->needs_remote_wakeup = 0;
if (!r)
usb_autopm_put_interface(usbtouch->interface);
}
static int usbtouch_suspend
(struct usb_interface *intf, pm_message_t message)
{
struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
usb_kill_urb(usbtouch->irq);
return 0;
}
static int usbtouch_resume(struct usb_interface *intf)
{
struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
int result = 0;
mutex_lock(&usbtouch->pm_mutex);
if (usbtouch->is_open || usbtouch->type->irq_always)
result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
mutex_unlock(&usbtouch->pm_mutex);
return result;
}
static int usbtouch_reset_resume(struct usb_interface *intf)
{
struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
int err = 0;
/* reinit the device */
if (usbtouch->type->init) {
err = usbtouch->type->init(usbtouch);
if (err) {
dev_dbg(&intf->dev,
"%s - type->init() failed, err: %d\n",
__func__, err);
return err;
}
}
/* restart IO if needed */
mutex_lock(&usbtouch->pm_mutex);
if (usbtouch->is_open)
err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
mutex_unlock(&usbtouch->pm_mutex);
return err;
}
static void usbtouch_free_buffers(struct usb_device *udev,
struct usbtouch_usb *usbtouch)
{
usb_free_coherent(udev, usbtouch->data_size,
usbtouch->data, usbtouch->data_dma);
kfree(usbtouch->buffer);
}
static struct usb_endpoint_descriptor *
usbtouch_get_input_endpoint(struct usb_host_interface *interface)
{
int i;
for (i = 0; i < interface->desc.bNumEndpoints; i++)
if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
return &interface->endpoint[i].desc;
return NULL;
}
static int usbtouch_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usbtouch_usb *usbtouch;
struct input_dev *input_dev;
struct usb_endpoint_descriptor *endpoint;
struct usb_device *udev = interface_to_usbdev(intf);
struct usbtouch_device_info *type;
int err = -ENOMEM;
/* some devices are ignored */
if (id->driver_info == DEVTYPE_IGNORE)
return -ENODEV;
if (id->driver_info >= ARRAY_SIZE(usbtouch_dev_info))
return -ENODEV;
endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
if (!endpoint)
return -ENXIO;
usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
input_dev = input_allocate_device();
if (!usbtouch || !input_dev)
goto out_free;
mutex_init(&usbtouch->pm_mutex);
type = &usbtouch_dev_info[id->driver_info];
usbtouch->type = type;
if (!type->process_pkt)
type->process_pkt = usbtouch_process_pkt;
usbtouch->data_size = type->rept_size;
if (type->get_pkt_len) {
/*
* When dealing with variable-length packets we should
* not request more than wMaxPacketSize bytes at once
* as we do not know if there is more data coming or
* we filled exactly wMaxPacketSize bytes and there is
* nothing else.
*/
usbtouch->data_size = min(usbtouch->data_size,
usb_endpoint_maxp(endpoint));
}
usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
GFP_KERNEL, &usbtouch->data_dma);
if (!usbtouch->data)
goto out_free;
if (type->get_pkt_len) {
usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
if (!usbtouch->buffer)
goto out_free_buffers;
}
usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
if (!usbtouch->irq) {
dev_dbg(&intf->dev,
"%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
goto out_free_buffers;
}
usbtouch->interface = intf;
usbtouch->input = input_dev;
if (udev->manufacturer)
strscpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
if (udev->product) {
if (udev->manufacturer)
strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
}
if (!strlen(usbtouch->name))
snprintf(usbtouch->name, sizeof(usbtouch->name),
"USB Touchscreen %04x:%04x",
le16_to_cpu(udev->descriptor.idVendor),
le16_to_cpu(udev->descriptor.idProduct));
usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
input_dev->name = usbtouch->name;
input_dev->phys = usbtouch->phys;
usb_to_input_id(udev, &input_dev->id);
input_dev->dev.parent = &intf->dev;
input_set_drvdata(input_dev, usbtouch);
input_dev->open = usbtouch_open;
input_dev->close = usbtouch_close;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
if (type->max_press)
input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
type->max_press, 0, 0);
if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
usb_fill_int_urb(usbtouch->irq, udev,
usb_rcvintpipe(udev, endpoint->bEndpointAddress),
usbtouch->data, usbtouch->data_size,
usbtouch_irq, usbtouch, endpoint->bInterval);
else
usb_fill_bulk_urb(usbtouch->irq, udev,
usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
usbtouch->data, usbtouch->data_size,
usbtouch_irq, usbtouch);
usbtouch->irq->dev = udev;
usbtouch->irq->transfer_dma = usbtouch->data_dma;
usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
/* device specific allocations */
if (type->alloc) {
err = type->alloc(usbtouch);
if (err) {
dev_dbg(&intf->dev,
"%s - type->alloc() failed, err: %d\n",
__func__, err);
goto out_free_urb;
}
}
/* device specific initialisation*/
if (type->init) {
err = type->init(usbtouch);
if (err) {
dev_dbg(&intf->dev,
"%s - type->init() failed, err: %d\n",
__func__, err);
goto out_do_exit;
}
}
err = input_register_device(usbtouch->input);
if (err) {
dev_dbg(&intf->dev,
"%s - input_register_device failed, err: %d\n",
__func__, err);
goto out_do_exit;
}
usb_set_intfdata(intf, usbtouch);
if (usbtouch->type->irq_always) {
/* this can't fail */
usb_autopm_get_interface(intf);
err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
if (err) {
usb_autopm_put_interface(intf);
dev_err(&intf->dev,
"%s - usb_submit_urb failed with result: %d\n",
__func__, err);
goto out_unregister_input;
}
}
return 0;
out_unregister_input:
input_unregister_device(input_dev);
input_dev = NULL;
out_do_exit:
if (type->exit)
type->exit(usbtouch);
out_free_urb:
usb_free_urb(usbtouch->irq);
out_free_buffers:
usbtouch_free_buffers(udev, usbtouch);
out_free:
input_free_device(input_dev);
kfree(usbtouch);
return err;
}
static void usbtouch_disconnect(struct usb_interface *intf)
{
struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
if (!usbtouch)
return;
dev_dbg(&intf->dev,
"%s - usbtouch is initialized, cleaning up\n", __func__);
usb_set_intfdata(intf, NULL);
/* this will stop IO via close */
input_unregister_device(usbtouch->input);
usb_free_urb(usbtouch->irq);
if (usbtouch->type->exit)
usbtouch->type->exit(usbtouch);
usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
kfree(usbtouch);
}
MODULE_DEVICE_TABLE(usb, usbtouch_devices);
static struct usb_driver usbtouch_driver = {
.name = "usbtouchscreen",
.probe = usbtouch_probe,
.disconnect = usbtouch_disconnect,
.suspend = usbtouch_suspend,
.resume = usbtouch_resume,
.reset_resume = usbtouch_reset_resume,
.id_table = usbtouch_devices,
.supports_autosuspend = 1,
};
module_usb_driver(usbtouch_driver);
MODULE_AUTHOR("Daniel Ritz <[email protected]>");
MODULE_DESCRIPTION("USB Touchscreen Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("touchkitusb");
MODULE_ALIAS("itmtouch");
MODULE_ALIAS("mtouchusb");
|
linux-master
|
drivers/input/touchscreen/usbtouchscreen.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2000-2001 Vojtech Pavlik
*/
/*
* Gunze AHL-51S touchscreen driver for Linux
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/serio.h>
#define DRIVER_DESC "Gunze AHL-51S touchscreen driver"
MODULE_AUTHOR("Vojtech Pavlik <[email protected]>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
/*
* Definitions & global arrays.
*/
#define GUNZE_MAX_LENGTH 10
/*
* Per-touchscreen data.
*/
struct gunze {
struct input_dev *dev;
struct serio *serio;
int idx;
unsigned char data[GUNZE_MAX_LENGTH];
char phys[32];
};
static void gunze_process_packet(struct gunze *gunze)
{
struct input_dev *dev = gunze->dev;
if (gunze->idx != GUNZE_MAX_LENGTH || gunze->data[5] != ',' ||
(gunze->data[0] != 'T' && gunze->data[0] != 'R')) {
printk(KERN_WARNING "gunze.c: bad packet: >%.*s<\n", GUNZE_MAX_LENGTH, gunze->data);
return;
}
input_report_abs(dev, ABS_X, simple_strtoul(gunze->data + 1, NULL, 10));
input_report_abs(dev, ABS_Y, 1024 - simple_strtoul(gunze->data + 6, NULL, 10));
input_report_key(dev, BTN_TOUCH, gunze->data[0] == 'T');
input_sync(dev);
}
static irqreturn_t gunze_interrupt(struct serio *serio,
unsigned char data, unsigned int flags)
{
struct gunze *gunze = serio_get_drvdata(serio);
if (data == '\r') {
gunze_process_packet(gunze);
gunze->idx = 0;
} else {
if (gunze->idx < GUNZE_MAX_LENGTH)
gunze->data[gunze->idx++] = data;
}
return IRQ_HANDLED;
}
/*
* gunze_disconnect() is the opposite of gunze_connect()
*/
static void gunze_disconnect(struct serio *serio)
{
struct gunze *gunze = serio_get_drvdata(serio);
input_get_device(gunze->dev);
input_unregister_device(gunze->dev);
serio_close(serio);
serio_set_drvdata(serio, NULL);
input_put_device(gunze->dev);
kfree(gunze);
}
/*
* gunze_connect() is the routine that is called when someone adds a
* new serio device that supports Gunze protocol and registers it as
* an input device.
*/
static int gunze_connect(struct serio *serio, struct serio_driver *drv)
{
struct gunze *gunze;
struct input_dev *input_dev;
int err;
gunze = kzalloc(sizeof(struct gunze), GFP_KERNEL);
input_dev = input_allocate_device();
if (!gunze || !input_dev) {
err = -ENOMEM;
goto fail1;
}
gunze->serio = serio;
gunze->dev = input_dev;
snprintf(gunze->phys, sizeof(serio->phys), "%s/input0", serio->phys);
input_dev->name = "Gunze AHL-51S TouchScreen";
input_dev->phys = gunze->phys;
input_dev->id.bustype = BUS_RS232;
input_dev->id.vendor = SERIO_GUNZE;
input_dev->id.product = 0x0051;
input_dev->id.version = 0x0100;
input_dev->dev.parent = &serio->dev;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_abs_params(input_dev, ABS_X, 24, 1000, 0, 0);
input_set_abs_params(input_dev, ABS_Y, 24, 1000, 0, 0);
serio_set_drvdata(serio, gunze);
err = serio_open(serio, drv);
if (err)
goto fail2;
err = input_register_device(gunze->dev);
if (err)
goto fail3;
return 0;
fail3: serio_close(serio);
fail2: serio_set_drvdata(serio, NULL);
fail1: input_free_device(input_dev);
kfree(gunze);
return err;
}
/*
* The serio driver structure.
*/
static const struct serio_device_id gunze_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_GUNZE,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, gunze_serio_ids);
static struct serio_driver gunze_drv = {
.driver = {
.name = "gunze",
},
.description = DRIVER_DESC,
.id_table = gunze_serio_ids,
.interrupt = gunze_interrupt,
.connect = gunze_connect,
.disconnect = gunze_disconnect,
};
module_serio_driver(gunze_drv);
|
linux-master
|
drivers/input/touchscreen/gunze.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* mainstone-wm97xx.c -- Mainstone Continuous Touch screen driver for
* Wolfson WM97xx AC97 Codecs.
*
* Copyright 2004, 2007 Wolfson Microelectronics PLC.
* Author: Liam Girdwood <[email protected]>
* Parts Copyright : Ian Molton <[email protected]>
* Andrew Zabolotny <[email protected]>
*
* Notes:
* This is a wm97xx extended touch driver to capture touch
* data in a continuous manner on the Intel XScale architecture
*
* Features:
* - codecs supported:- WM9705, WM9712, WM9713
* - processors supported:- Intel XScale PXA25x, PXA26x, PXA27x
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/soc/pxa/cpu.h>
#include <linux/wm97xx.h>
#include <sound/pxa2xx-lib.h>
#include <asm/mach-types.h>
struct continuous {
u16 id; /* codec id */
u8 code; /* continuous code */
u8 reads; /* number of coord reads per read cycle */
u32 speed; /* number of coords per second */
};
#define WM_READS(sp) ((sp / HZ) + 1)
static const struct continuous cinfo[] = {
{ WM9705_ID2, 0, WM_READS(94), 94 },
{ WM9705_ID2, 1, WM_READS(188), 188 },
{ WM9705_ID2, 2, WM_READS(375), 375 },
{ WM9705_ID2, 3, WM_READS(750), 750 },
{ WM9712_ID2, 0, WM_READS(94), 94 },
{ WM9712_ID2, 1, WM_READS(188), 188 },
{ WM9712_ID2, 2, WM_READS(375), 375 },
{ WM9712_ID2, 3, WM_READS(750), 750 },
{ WM9713_ID2, 0, WM_READS(94), 94 },
{ WM9713_ID2, 1, WM_READS(120), 120 },
{ WM9713_ID2, 2, WM_READS(154), 154 },
{ WM9713_ID2, 3, WM_READS(188), 188 },
};
/* continuous speed index */
static int sp_idx;
static struct gpio_desc *gpiod_irq;
/*
* Pen sampling frequency (Hz) in continuous mode.
*/
static int cont_rate = 200;
module_param(cont_rate, int, 0);
MODULE_PARM_DESC(cont_rate, "Sampling rate in continuous mode (Hz)");
/*
* Pen down detection.
*
* This driver can either poll or use an interrupt to indicate a pen down
* event. If the irq request fails then it will fall back to polling mode.
*/
static int pen_int;
module_param(pen_int, int, 0);
MODULE_PARM_DESC(pen_int, "Pen down detection (1 = interrupt, 0 = polling)");
/*
* Pressure readback.
*
* Set to 1 to read back pen down pressure
*/
static int pressure;
module_param(pressure, int, 0);
MODULE_PARM_DESC(pressure, "Pressure readback (1 = pressure, 0 = no pressure)");
/*
* AC97 touch data slot.
*
* Touch screen readback data ac97 slot
*/
static int ac97_touch_slot = 5;
module_param(ac97_touch_slot, int, 0);
MODULE_PARM_DESC(ac97_touch_slot, "Touch screen data slot AC97 number");
/* flush AC97 slot 5 FIFO on pxa machines */
static void wm97xx_acc_pen_up(struct wm97xx *wm)
{
unsigned int count;
msleep(1);
if (cpu_is_pxa27x()) {
while (pxa2xx_ac97_read_misr() & (1 << 2))
pxa2xx_ac97_read_modr();
} else if (cpu_is_pxa3xx()) {
for (count = 0; count < 16; count++)
pxa2xx_ac97_read_modr();
}
}
static int wm97xx_acc_pen_down(struct wm97xx *wm)
{
u16 x, y, p = 0x100 | WM97XX_ADCSEL_PRES;
int reads = 0;
static u16 last, tries;
/* When the AC97 queue has been drained we need to allow time
* to buffer up samples otherwise we end up spinning polling
* for samples. The controller can't have a suitably low
* threshold set to use the notifications it gives.
*/
msleep(1);
if (tries > 5) {
tries = 0;
return RC_PENUP;
}
x = pxa2xx_ac97_read_modr();
if (x == last) {
tries++;
return RC_AGAIN;
}
last = x;
do {
if (reads)
x = pxa2xx_ac97_read_modr();
y = pxa2xx_ac97_read_modr();
if (pressure)
p = pxa2xx_ac97_read_modr();
dev_dbg(wm->dev, "Raw coordinates: x=%x, y=%x, p=%x\n",
x, y, p);
/* are samples valid */
if ((x & WM97XX_ADCSEL_MASK) != WM97XX_ADCSEL_X ||
(y & WM97XX_ADCSEL_MASK) != WM97XX_ADCSEL_Y ||
(p & WM97XX_ADCSEL_MASK) != WM97XX_ADCSEL_PRES)
goto up;
/* coordinate is good */
tries = 0;
input_report_abs(wm->input_dev, ABS_X, x & 0xfff);
input_report_abs(wm->input_dev, ABS_Y, y & 0xfff);
input_report_abs(wm->input_dev, ABS_PRESSURE, p & 0xfff);
input_report_key(wm->input_dev, BTN_TOUCH, (p != 0));
input_sync(wm->input_dev);
reads++;
} while (reads < cinfo[sp_idx].reads);
up:
return RC_PENDOWN | RC_AGAIN;
}
static int wm97xx_acc_startup(struct wm97xx *wm)
{
int idx = 0, ret = 0;
/* check we have a codec */
if (wm->ac97 == NULL)
return -ENODEV;
/* Go you big red fire engine */
for (idx = 0; idx < ARRAY_SIZE(cinfo); idx++) {
if (wm->id != cinfo[idx].id)
continue;
sp_idx = idx;
if (cont_rate <= cinfo[idx].speed)
break;
}
wm->acc_rate = cinfo[sp_idx].code;
wm->acc_slot = ac97_touch_slot;
dev_info(wm->dev,
"mainstone accelerated touchscreen driver, %d samples/sec\n",
cinfo[sp_idx].speed);
if (pen_int) {
gpiod_irq = gpiod_get(wm->dev, "touch", GPIOD_IN);
if (IS_ERR(gpiod_irq))
pen_int = 0;
}
if (pen_int) {
wm->pen_irq = gpiod_to_irq(gpiod_irq);
irq_set_irq_type(wm->pen_irq, IRQ_TYPE_EDGE_BOTH);
}
/* codec specific irq config */
if (pen_int) {
switch (wm->id) {
case WM9705_ID2:
break;
case WM9712_ID2:
case WM9713_ID2:
/* use PEN_DOWN GPIO 13 to assert IRQ on GPIO line 2 */
wm97xx_config_gpio(wm, WM97XX_GPIO_13, WM97XX_GPIO_IN,
WM97XX_GPIO_POL_HIGH,
WM97XX_GPIO_STICKY,
WM97XX_GPIO_WAKE);
wm97xx_config_gpio(wm, WM97XX_GPIO_2, WM97XX_GPIO_OUT,
WM97XX_GPIO_POL_HIGH,
WM97XX_GPIO_NOTSTICKY,
WM97XX_GPIO_NOWAKE);
break;
default:
dev_err(wm->dev,
"pen down irq not supported on this device\n");
pen_int = 0;
break;
}
}
return ret;
}
static void wm97xx_acc_shutdown(struct wm97xx *wm)
{
/* codec specific deconfig */
if (pen_int) {
if (gpiod_irq)
gpiod_put(gpiod_irq);
wm->pen_irq = 0;
}
}
static struct wm97xx_mach_ops mainstone_mach_ops = {
.acc_enabled = 1,
.acc_pen_up = wm97xx_acc_pen_up,
.acc_pen_down = wm97xx_acc_pen_down,
.acc_startup = wm97xx_acc_startup,
.acc_shutdown = wm97xx_acc_shutdown,
.irq_gpio = WM97XX_GPIO_2,
};
static int mainstone_wm97xx_probe(struct platform_device *pdev)
{
struct wm97xx *wm = platform_get_drvdata(pdev);
return wm97xx_register_mach_ops(wm, &mainstone_mach_ops);
}
static int mainstone_wm97xx_remove(struct platform_device *pdev)
{
struct wm97xx *wm = platform_get_drvdata(pdev);
wm97xx_unregister_mach_ops(wm);
return 0;
}
static struct platform_driver mainstone_wm97xx_driver = {
.probe = mainstone_wm97xx_probe,
.remove = mainstone_wm97xx_remove,
.driver = {
.name = "wm97xx-touch",
},
};
module_platform_driver(mainstone_wm97xx_driver);
/* Module information */
MODULE_AUTHOR("Liam Girdwood <[email protected]>");
MODULE_DESCRIPTION("wm97xx continuous touch driver for mainstone");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/mainstone-wm97xx.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* cyttsp_i2c.c
* Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
* For use with Cypress Txx3xx parts.
* Supported parts include:
* CY8CTST341
* CY8CTMA340
*
* Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
* Copyright (C) 2012 Javier Martinez Canillas <[email protected]>
*
* Contact Cypress Semiconductor at www.cypress.com <[email protected]>
*/
#include "cyttsp_core.h"
#include <linux/i2c.h>
#include <linux/input.h>
#define CY_I2C_NAME "cyttsp-i2c"
#define CY_I2C_DATA_SIZE 128
static const struct cyttsp_bus_ops cyttsp_i2c_bus_ops = {
.bustype = BUS_I2C,
.write = cyttsp_i2c_write_block_data,
.read = cyttsp_i2c_read_block_data,
};
static int cyttsp_i2c_probe(struct i2c_client *client)
{
struct cyttsp *ts;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "I2C functionality not Supported\n");
return -EIO;
}
ts = cyttsp_probe(&cyttsp_i2c_bus_ops, &client->dev, client->irq,
CY_I2C_DATA_SIZE);
if (IS_ERR(ts))
return PTR_ERR(ts);
i2c_set_clientdata(client, ts);
return 0;
}
static const struct i2c_device_id cyttsp_i2c_id[] = {
{ CY_I2C_NAME, 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id);
static const struct of_device_id cyttsp_of_i2c_match[] = {
{ .compatible = "cypress,cy8ctma340", },
{ .compatible = "cypress,cy8ctst341", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, cyttsp_of_i2c_match);
static struct i2c_driver cyttsp_i2c_driver = {
.driver = {
.name = CY_I2C_NAME,
.pm = pm_sleep_ptr(&cyttsp_pm_ops),
.of_match_table = cyttsp_of_i2c_match,
},
.probe = cyttsp_i2c_probe,
.id_table = cyttsp_i2c_id,
};
module_i2c_driver(cyttsp_i2c_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
MODULE_AUTHOR("Cypress");
|
linux-master
|
drivers/input/touchscreen/cyttsp_i2c.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* MELFAS MIP4 Touchscreen
*
* Copyright (C) 2016 MELFAS Inc.
*
* Author : Sangwon Jee <[email protected]>
*/
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <asm/unaligned.h>
#define MIP4_DEVICE_NAME "mip4_ts"
/*****************************************************************
* Protocol
* Version : MIP 4.0 Rev 5.4
*****************************************************************/
/* Address */
#define MIP4_R0_BOOT 0x00
#define MIP4_R1_BOOT_MODE 0x01
#define MIP4_R1_BOOT_BUF_ADDR 0x10
#define MIP4_R1_BOOT_STATUS 0x20
#define MIP4_R1_BOOT_CMD 0x30
#define MIP4_R1_BOOT_TARGET_ADDR 0x40
#define MIP4_R1_BOOT_SIZE 0x44
#define MIP4_R0_INFO 0x01
#define MIP4_R1_INFO_PRODUCT_NAME 0x00
#define MIP4_R1_INFO_RESOLUTION_X 0x10
#define MIP4_R1_INFO_RESOLUTION_Y 0x12
#define MIP4_R1_INFO_NODE_NUM_X 0x14
#define MIP4_R1_INFO_NODE_NUM_Y 0x15
#define MIP4_R1_INFO_KEY_NUM 0x16
#define MIP4_R1_INFO_PRESSURE_NUM 0x17
#define MIP4_R1_INFO_LENGTH_X 0x18
#define MIP4_R1_INFO_LENGTH_Y 0x1A
#define MIP4_R1_INFO_PPM_X 0x1C
#define MIP4_R1_INFO_PPM_Y 0x1D
#define MIP4_R1_INFO_VERSION_BOOT 0x20
#define MIP4_R1_INFO_VERSION_CORE 0x22
#define MIP4_R1_INFO_VERSION_APP 0x24
#define MIP4_R1_INFO_VERSION_PARAM 0x26
#define MIP4_R1_INFO_SECT_BOOT_START 0x30
#define MIP4_R1_INFO_SECT_BOOT_END 0x31
#define MIP4_R1_INFO_SECT_CORE_START 0x32
#define MIP4_R1_INFO_SECT_CORE_END 0x33
#define MIP4_R1_INFO_SECT_APP_START 0x34
#define MIP4_R1_INFO_SECT_APP_END 0x35
#define MIP4_R1_INFO_SECT_PARAM_START 0x36
#define MIP4_R1_INFO_SECT_PARAM_END 0x37
#define MIP4_R1_INFO_BUILD_DATE 0x40
#define MIP4_R1_INFO_BUILD_TIME 0x44
#define MIP4_R1_INFO_CHECKSUM_PRECALC 0x48
#define MIP4_R1_INFO_CHECKSUM_REALTIME 0x4A
#define MIP4_R1_INFO_PROTOCOL_NAME 0x50
#define MIP4_R1_INFO_PROTOCOL_VERSION 0x58
#define MIP4_R1_INFO_IC_ID 0x70
#define MIP4_R1_INFO_IC_NAME 0x71
#define MIP4_R1_INFO_IC_VENDOR_ID 0x75
#define MIP4_R1_INFO_IC_HW_CATEGORY 0x77
#define MIP4_R1_INFO_CONTACT_THD_SCR 0x78
#define MIP4_R1_INFO_CONTACT_THD_KEY 0x7A
#define MIP4_R1_INFO_PID 0x7C
#define MIP4_R1_INFO_VID 0x7E
#define MIP4_R1_INFO_SLAVE_ADDR 0x80
#define MIP4_R0_EVENT 0x02
#define MIP4_R1_EVENT_SUPPORTED_FUNC 0x00
#define MIP4_R1_EVENT_FORMAT 0x04
#define MIP4_R1_EVENT_SIZE 0x06
#define MIP4_R1_EVENT_PACKET_INFO 0x10
#define MIP4_R1_EVENT_PACKET_DATA 0x11
#define MIP4_R0_CTRL 0x06
#define MIP4_R1_CTRL_READY_STATUS 0x00
#define MIP4_R1_CTRL_EVENT_READY 0x01
#define MIP4_R1_CTRL_MODE 0x10
#define MIP4_R1_CTRL_EVENT_TRIGGER_TYPE 0x11
#define MIP4_R1_CTRL_RECALIBRATE 0x12
#define MIP4_R1_CTRL_POWER_STATE 0x13
#define MIP4_R1_CTRL_GESTURE_TYPE 0x14
#define MIP4_R1_CTRL_DISABLE_ESD_ALERT 0x18
#define MIP4_R1_CTRL_CHARGER_MODE 0x19
#define MIP4_R1_CTRL_HIGH_SENS_MODE 0x1A
#define MIP4_R1_CTRL_WINDOW_MODE 0x1B
#define MIP4_R1_CTRL_PALM_REJECTION 0x1C
#define MIP4_R1_CTRL_EDGE_CORRECTION 0x1D
#define MIP4_R1_CTRL_ENTER_GLOVE_MODE 0x1E
#define MIP4_R1_CTRL_I2C_ON_LPM 0x1F
#define MIP4_R1_CTRL_GESTURE_DEBUG 0x20
#define MIP4_R1_CTRL_PALM_EVENT 0x22
#define MIP4_R1_CTRL_PROXIMITY_SENSING 0x23
/* Value */
#define MIP4_BOOT_MODE_BOOT 0x01
#define MIP4_BOOT_MODE_APP 0x02
#define MIP4_BOOT_STATUS_BUSY 0x05
#define MIP4_BOOT_STATUS_ERROR 0x0E
#define MIP4_BOOT_STATUS_DONE 0xA0
#define MIP4_BOOT_CMD_MASS_ERASE 0x15
#define MIP4_BOOT_CMD_PROGRAM 0x54
#define MIP4_BOOT_CMD_ERASE 0x8F
#define MIP4_BOOT_CMD_WRITE 0xA5
#define MIP4_BOOT_CMD_READ 0xC2
#define MIP4_EVENT_INPUT_TYPE_KEY 0
#define MIP4_EVENT_INPUT_TYPE_SCREEN 1
#define MIP4_EVENT_INPUT_TYPE_PROXIMITY 2
#define I2C_RETRY_COUNT 3 /* 2~ */
#define MIP4_BUF_SIZE 128
#define MIP4_MAX_FINGERS 10
#define MIP4_MAX_KEYS 4
#define MIP4_TOUCH_MAJOR_MIN 0
#define MIP4_TOUCH_MAJOR_MAX 255
#define MIP4_TOUCH_MINOR_MIN 0
#define MIP4_TOUCH_MINOR_MAX 255
#define MIP4_PRESSURE_MIN 0
#define MIP4_PRESSURE_MAX 255
#define MIP4_FW_NAME "melfas_mip4.fw"
#define MIP4_FW_UPDATE_DEBUG 0 /* 0 (default) or 1 */
struct mip4_fw_version {
u16 boot;
u16 core;
u16 app;
u16 param;
};
struct mip4_ts {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *gpio_ce;
char phys[32];
char product_name[16];
u16 product_id;
char ic_name[4];
char fw_name[32];
unsigned int max_x;
unsigned int max_y;
u8 node_x;
u8 node_y;
u8 node_key;
unsigned int ppm_x;
unsigned int ppm_y;
struct mip4_fw_version fw_version;
unsigned int event_size;
unsigned int event_format;
unsigned int key_num;
unsigned short key_code[MIP4_MAX_KEYS];
bool wake_irq_enabled;
u8 buf[MIP4_BUF_SIZE];
};
static int mip4_i2c_xfer(struct mip4_ts *ts,
char *write_buf, unsigned int write_len,
char *read_buf, unsigned int read_len)
{
struct i2c_msg msg[] = {
{
.addr = ts->client->addr,
.flags = 0,
.buf = write_buf,
.len = write_len,
}, {
.addr = ts->client->addr,
.flags = I2C_M_RD,
.buf = read_buf,
.len = read_len,
},
};
int retry = I2C_RETRY_COUNT;
int res;
int error;
do {
res = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
if (res == ARRAY_SIZE(msg))
return 0;
error = res < 0 ? res : -EIO;
dev_err(&ts->client->dev,
"%s - i2c_transfer failed: %d (%d)\n",
__func__, error, res);
} while (--retry);
return error;
}
static void mip4_parse_fw_version(const u8 *buf, struct mip4_fw_version *v)
{
v->boot = get_unaligned_le16(buf + 0);
v->core = get_unaligned_le16(buf + 2);
v->app = get_unaligned_le16(buf + 4);
v->param = get_unaligned_le16(buf + 6);
}
/*
* Read chip firmware version
*/
static int mip4_get_fw_version(struct mip4_ts *ts)
{
u8 cmd[] = { MIP4_R0_INFO, MIP4_R1_INFO_VERSION_BOOT };
u8 buf[sizeof(ts->fw_version)];
int error;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, sizeof(buf));
if (error) {
memset(&ts->fw_version, 0xff, sizeof(ts->fw_version));
return error;
}
mip4_parse_fw_version(buf, &ts->fw_version);
return 0;
}
/*
* Fetch device characteristics
*/
static int mip4_query_device(struct mip4_ts *ts)
{
union i2c_smbus_data dummy;
int error;
u8 cmd[2];
u8 buf[14];
/*
* Make sure there is something at this address as we do not
* consider subsequent failures as fatal.
*/
if (i2c_smbus_xfer(ts->client->adapter, ts->client->addr,
0, I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) {
dev_err(&ts->client->dev, "nothing at this address\n");
return -ENXIO;
}
/* Product name */
cmd[0] = MIP4_R0_INFO;
cmd[1] = MIP4_R1_INFO_PRODUCT_NAME;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd),
ts->product_name, sizeof(ts->product_name));
if (error)
dev_warn(&ts->client->dev,
"Failed to retrieve product name: %d\n", error);
else
dev_dbg(&ts->client->dev, "product name: %.*s\n",
(int)sizeof(ts->product_name), ts->product_name);
/* Product ID */
cmd[0] = MIP4_R0_INFO;
cmd[1] = MIP4_R1_INFO_PID;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 2);
if (error) {
dev_warn(&ts->client->dev,
"Failed to retrieve product id: %d\n", error);
} else {
ts->product_id = get_unaligned_le16(&buf[0]);
dev_dbg(&ts->client->dev, "product id: %04X\n", ts->product_id);
}
/* Firmware name */
snprintf(ts->fw_name, sizeof(ts->fw_name),
"melfas_mip4_%04X.fw", ts->product_id);
dev_dbg(&ts->client->dev, "firmware name: %s\n", ts->fw_name);
/* IC name */
cmd[0] = MIP4_R0_INFO;
cmd[1] = MIP4_R1_INFO_IC_NAME;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd),
ts->ic_name, sizeof(ts->ic_name));
if (error)
dev_warn(&ts->client->dev,
"Failed to retrieve IC name: %d\n", error);
else
dev_dbg(&ts->client->dev, "IC name: %.*s\n",
(int)sizeof(ts->ic_name), ts->ic_name);
/* Firmware version */
error = mip4_get_fw_version(ts);
if (error)
dev_warn(&ts->client->dev,
"Failed to retrieve FW version: %d\n", error);
else
dev_dbg(&ts->client->dev, "F/W Version: %04X %04X %04X %04X\n",
ts->fw_version.boot, ts->fw_version.core,
ts->fw_version.app, ts->fw_version.param);
/* Resolution */
cmd[0] = MIP4_R0_INFO;
cmd[1] = MIP4_R1_INFO_RESOLUTION_X;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 14);
if (error) {
dev_warn(&ts->client->dev,
"Failed to retrieve touchscreen parameters: %d\n",
error);
} else {
ts->max_x = get_unaligned_le16(&buf[0]);
ts->max_y = get_unaligned_le16(&buf[2]);
dev_dbg(&ts->client->dev, "max_x: %d, max_y: %d\n",
ts->max_x, ts->max_y);
ts->node_x = buf[4];
ts->node_y = buf[5];
ts->node_key = buf[6];
dev_dbg(&ts->client->dev,
"node_x: %d, node_y: %d, node_key: %d\n",
ts->node_x, ts->node_y, ts->node_key);
ts->ppm_x = buf[12];
ts->ppm_y = buf[13];
dev_dbg(&ts->client->dev, "ppm_x: %d, ppm_y: %d\n",
ts->ppm_x, ts->ppm_y);
/* Key ts */
if (ts->node_key > 0)
ts->key_num = ts->node_key;
}
/* Protocol */
cmd[0] = MIP4_R0_EVENT;
cmd[1] = MIP4_R1_EVENT_SUPPORTED_FUNC;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 7);
if (error) {
dev_warn(&ts->client->dev,
"Failed to retrieve device type: %d\n", error);
ts->event_format = 0xff;
} else {
ts->event_format = get_unaligned_le16(&buf[4]);
ts->event_size = buf[6];
dev_dbg(&ts->client->dev, "event_format: %d, event_size: %d\n",
ts->event_format, ts->event_size);
if (ts->event_format == 2 || ts->event_format > 3)
dev_warn(&ts->client->dev,
"Unknown event format %d\n", ts->event_format);
}
return 0;
}
static int mip4_power_on(struct mip4_ts *ts)
{
if (ts->gpio_ce) {
gpiod_set_value_cansleep(ts->gpio_ce, 1);
/* Booting delay : 200~300ms */
usleep_range(200 * 1000, 300 * 1000);
}
return 0;
}
static void mip4_power_off(struct mip4_ts *ts)
{
if (ts->gpio_ce)
gpiod_set_value_cansleep(ts->gpio_ce, 0);
}
/*
* Clear touch input event status
*/
static void mip4_clear_input(struct mip4_ts *ts)
{
int i;
/* Screen */
for (i = 0; i < MIP4_MAX_FINGERS; i++) {
input_mt_slot(ts->input, i);
input_mt_report_slot_inactive(ts->input);
}
/* Keys */
for (i = 0; i < ts->key_num; i++)
input_report_key(ts->input, ts->key_code[i], 0);
input_sync(ts->input);
}
static int mip4_enable(struct mip4_ts *ts)
{
int error;
error = mip4_power_on(ts);
if (error)
return error;
enable_irq(ts->client->irq);
return 0;
}
static void mip4_disable(struct mip4_ts *ts)
{
disable_irq(ts->client->irq);
mip4_power_off(ts);
mip4_clear_input(ts);
}
/*****************************************************************
* Input handling
*****************************************************************/
static void mip4_report_keys(struct mip4_ts *ts, u8 *packet)
{
u8 key;
bool down;
switch (ts->event_format) {
case 0:
case 1:
key = packet[0] & 0x0F;
down = packet[0] & 0x80;
break;
case 3:
default:
key = packet[0] & 0x0F;
down = packet[1] & 0x01;
break;
}
/* Report key event */
if (key >= 1 && key <= ts->key_num) {
unsigned short keycode = ts->key_code[key - 1];
dev_dbg(&ts->client->dev,
"Key - ID: %d, keycode: %d, state: %d\n",
key, keycode, down);
input_event(ts->input, EV_MSC, MSC_SCAN, keycode);
input_report_key(ts->input, keycode, down);
} else {
dev_err(&ts->client->dev, "Unknown key: %d\n", key);
}
}
static void mip4_report_touch(struct mip4_ts *ts, u8 *packet)
{
int id;
bool __always_unused hover;
bool palm;
bool state;
u16 x, y;
u8 __always_unused pressure_stage = 0;
u8 pressure;
u8 __always_unused size;
u8 touch_major;
u8 touch_minor;
switch (ts->event_format) {
case 0:
case 1:
/* Touch only */
state = packet[0] & BIT(7);
hover = packet[0] & BIT(5);
palm = packet[0] & BIT(4);
id = (packet[0] & 0x0F) - 1;
x = ((packet[1] & 0x0F) << 8) | packet[2];
y = (((packet[1] >> 4) & 0x0F) << 8) |
packet[3];
pressure = packet[4];
size = packet[5];
if (ts->event_format == 0) {
touch_major = packet[5];
touch_minor = packet[5];
} else {
touch_major = packet[6];
touch_minor = packet[7];
}
break;
case 3:
default:
/* Touch + Force(Pressure) */
id = (packet[0] & 0x0F) - 1;
hover = packet[1] & BIT(2);
palm = packet[1] & BIT(1);
state = packet[1] & BIT(0);
x = ((packet[2] & 0x0F) << 8) | packet[3];
y = (((packet[2] >> 4) & 0x0F) << 8) |
packet[4];
size = packet[6];
pressure_stage = (packet[7] & 0xF0) >> 4;
pressure = ((packet[7] & 0x0F) << 8) |
packet[8];
touch_major = packet[9];
touch_minor = packet[10];
break;
}
dev_dbg(&ts->client->dev,
"Screen - Slot: %d State: %d X: %04d Y: %04d Z: %d\n",
id, state, x, y, pressure);
if (unlikely(id < 0 || id >= MIP4_MAX_FINGERS)) {
dev_err(&ts->client->dev, "Screen - invalid slot ID: %d\n", id);
goto out;
}
input_mt_slot(ts->input, id);
if (input_mt_report_slot_state(ts->input,
palm ? MT_TOOL_PALM : MT_TOOL_FINGER,
state)) {
input_report_abs(ts->input, ABS_MT_POSITION_X, x);
input_report_abs(ts->input, ABS_MT_POSITION_Y, y);
input_report_abs(ts->input, ABS_MT_PRESSURE, pressure);
input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, touch_major);
input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, touch_minor);
}
out:
input_mt_sync_frame(ts->input);
}
static int mip4_handle_packet(struct mip4_ts *ts, u8 *packet)
{
u8 type;
switch (ts->event_format) {
case 0:
case 1:
type = (packet[0] & 0x40) >> 6;
break;
case 3:
type = (packet[0] & 0xF0) >> 4;
break;
default:
/* Should not happen unless we have corrupted firmware */
return -EINVAL;
}
dev_dbg(&ts->client->dev, "Type: %d\n", type);
/* Report input event */
switch (type) {
case MIP4_EVENT_INPUT_TYPE_KEY:
mip4_report_keys(ts, packet);
break;
case MIP4_EVENT_INPUT_TYPE_SCREEN:
mip4_report_touch(ts, packet);
break;
default:
dev_err(&ts->client->dev, "Unknown event type: %d\n", type);
break;
}
return 0;
}
static irqreturn_t mip4_interrupt(int irq, void *dev_id)
{
struct mip4_ts *ts = dev_id;
struct i2c_client *client = ts->client;
unsigned int i;
int error;
u8 cmd[2];
u8 size;
bool alert;
/* Read packet info */
cmd[0] = MIP4_R0_EVENT;
cmd[1] = MIP4_R1_EVENT_PACKET_INFO;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), ts->buf, 1);
if (error) {
dev_err(&client->dev,
"Failed to read packet info: %d\n", error);
goto out;
}
size = ts->buf[0] & 0x7F;
alert = ts->buf[0] & BIT(7);
dev_dbg(&client->dev, "packet size: %d, alert: %d\n", size, alert);
/* Check size */
if (!size) {
dev_err(&client->dev, "Empty packet\n");
goto out;
}
/* Read packet data */
cmd[0] = MIP4_R0_EVENT;
cmd[1] = MIP4_R1_EVENT_PACKET_DATA;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), ts->buf, size);
if (error) {
dev_err(&client->dev,
"Failed to read packet data: %d\n", error);
goto out;
}
if (alert) {
dev_dbg(&client->dev, "Alert: %d\n", ts->buf[0]);
} else {
for (i = 0; i < size; i += ts->event_size) {
error = mip4_handle_packet(ts, &ts->buf[i]);
if (error)
break;
}
input_sync(ts->input);
}
out:
return IRQ_HANDLED;
}
static int mip4_input_open(struct input_dev *dev)
{
struct mip4_ts *ts = input_get_drvdata(dev);
return mip4_enable(ts);
}
static void mip4_input_close(struct input_dev *dev)
{
struct mip4_ts *ts = input_get_drvdata(dev);
mip4_disable(ts);
}
/*****************************************************************
* Firmware update
*****************************************************************/
/* Firmware Info */
#define MIP4_BL_PAGE_SIZE 512 /* 512 */
#define MIP4_BL_PACKET_SIZE 512 /* 512, 256, 128, 64, ... */
/*
* Firmware binary tail info
*/
struct mip4_bin_tail {
u8 tail_mark[4];
u8 chip_name[4];
__le32 bin_start_addr;
__le32 bin_length;
__le16 ver_boot;
__le16 ver_core;
__le16 ver_app;
__le16 ver_param;
u8 boot_start;
u8 boot_end;
u8 core_start;
u8 core_end;
u8 app_start;
u8 app_end;
u8 param_start;
u8 param_end;
u8 checksum_type;
u8 hw_category;
__le16 param_id;
__le32 param_length;
__le32 build_date;
__le32 build_time;
__le32 reserved1;
__le32 reserved2;
__le16 reserved3;
__le16 tail_size;
__le32 crc;
} __packed;
#define MIP4_BIN_TAIL_MARK "MBT\001"
#define MIP4_BIN_TAIL_SIZE (sizeof(struct mip4_bin_tail))
/*
* Bootloader - Read status
*/
static int mip4_bl_read_status(struct mip4_ts *ts)
{
u8 cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_STATUS };
u8 result;
struct i2c_msg msg[] = {
{
.addr = ts->client->addr,
.flags = 0,
.buf = cmd,
.len = sizeof(cmd),
}, {
.addr = ts->client->addr,
.flags = I2C_M_RD,
.buf = &result,
.len = sizeof(result),
},
};
int ret;
int error;
int retry = 1000;
do {
ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
if (ret != ARRAY_SIZE(msg)) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to read bootloader status: %d\n",
error);
return error;
}
switch (result) {
case MIP4_BOOT_STATUS_DONE:
dev_dbg(&ts->client->dev, "%s - done\n", __func__);
return 0;
case MIP4_BOOT_STATUS_ERROR:
dev_err(&ts->client->dev, "Bootloader failure\n");
return -EIO;
case MIP4_BOOT_STATUS_BUSY:
dev_dbg(&ts->client->dev, "%s - Busy\n", __func__);
error = -EBUSY;
break;
default:
dev_err(&ts->client->dev,
"Unexpected bootloader status: %#02x\n",
result);
error = -EINVAL;
break;
}
usleep_range(1000, 2000);
} while (--retry);
return error;
}
/*
* Bootloader - Change mode
*/
static int mip4_bl_change_mode(struct mip4_ts *ts, u8 mode)
{
u8 mode_chg_cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_MODE, mode };
u8 mode_read_cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_MODE };
u8 result;
struct i2c_msg msg[] = {
{
.addr = ts->client->addr,
.flags = 0,
.buf = mode_read_cmd,
.len = sizeof(mode_read_cmd),
}, {
.addr = ts->client->addr,
.flags = I2C_M_RD,
.buf = &result,
.len = sizeof(result),
},
};
int retry = 10;
int ret;
int error;
do {
/* Send mode change command */
ret = i2c_master_send(ts->client,
mode_chg_cmd, sizeof(mode_chg_cmd));
if (ret != sizeof(mode_chg_cmd)) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to send %d mode change: %d (%d)\n",
mode, error, ret);
return error;
}
dev_dbg(&ts->client->dev,
"Sent mode change request (mode: %d)\n", mode);
/* Wait */
msleep(1000);
/* Verify target mode */
ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
if (ret != ARRAY_SIZE(msg)) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to read device mode: %d\n", error);
return error;
}
dev_dbg(&ts->client->dev,
"Current device mode: %d, want: %d\n", result, mode);
if (result == mode)
return 0;
} while (--retry);
return -EIO;
}
/*
* Bootloader - Start bootloader mode
*/
static int mip4_bl_enter(struct mip4_ts *ts)
{
return mip4_bl_change_mode(ts, MIP4_BOOT_MODE_BOOT);
}
/*
* Bootloader - Exit bootloader mode
*/
static int mip4_bl_exit(struct mip4_ts *ts)
{
return mip4_bl_change_mode(ts, MIP4_BOOT_MODE_APP);
}
static int mip4_bl_get_address(struct mip4_ts *ts, u16 *buf_addr)
{
u8 cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_BUF_ADDR };
u8 result[sizeof(u16)];
struct i2c_msg msg[] = {
{
.addr = ts->client->addr,
.flags = 0,
.buf = cmd,
.len = sizeof(cmd),
}, {
.addr = ts->client->addr,
.flags = I2C_M_RD,
.buf = result,
.len = sizeof(result),
},
};
int ret;
int error;
ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
if (ret != ARRAY_SIZE(msg)) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to retrieve bootloader buffer address: %d\n",
error);
return error;
}
*buf_addr = get_unaligned_le16(result);
dev_dbg(&ts->client->dev,
"Bootloader buffer address %#04x\n", *buf_addr);
return 0;
}
static int mip4_bl_program_page(struct mip4_ts *ts, int offset,
const u8 *data, int length, u16 buf_addr)
{
u8 cmd[6];
u8 *data_buf;
u16 buf_offset;
int ret;
int error;
dev_dbg(&ts->client->dev, "Writing page @%#06x (%d)\n",
offset, length);
if (length > MIP4_BL_PAGE_SIZE || length % MIP4_BL_PACKET_SIZE) {
dev_err(&ts->client->dev,
"Invalid page length: %d\n", length);
return -EINVAL;
}
data_buf = kmalloc(2 + MIP4_BL_PACKET_SIZE, GFP_KERNEL);
if (!data_buf)
return -ENOMEM;
/* Addr */
cmd[0] = MIP4_R0_BOOT;
cmd[1] = MIP4_R1_BOOT_TARGET_ADDR;
put_unaligned_le32(offset, &cmd[2]);
ret = i2c_master_send(ts->client, cmd, 6);
if (ret != 6) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to send write page address: %d\n", error);
goto out;
}
/* Size */
cmd[0] = MIP4_R0_BOOT;
cmd[1] = MIP4_R1_BOOT_SIZE;
put_unaligned_le32(length, &cmd[2]);
ret = i2c_master_send(ts->client, cmd, 6);
if (ret != 6) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to send write page size: %d\n", error);
goto out;
}
/* Data */
for (buf_offset = 0;
buf_offset < length;
buf_offset += MIP4_BL_PACKET_SIZE) {
dev_dbg(&ts->client->dev,
"writing chunk at %#04x (size %d)\n",
buf_offset, MIP4_BL_PACKET_SIZE);
put_unaligned_be16(buf_addr + buf_offset, data_buf);
memcpy(&data_buf[2], &data[buf_offset], MIP4_BL_PACKET_SIZE);
ret = i2c_master_send(ts->client,
data_buf, 2 + MIP4_BL_PACKET_SIZE);
if (ret != 2 + MIP4_BL_PACKET_SIZE) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to read chunk at %#04x (size %d): %d\n",
buf_offset, MIP4_BL_PACKET_SIZE, error);
goto out;
}
}
/* Command */
cmd[0] = MIP4_R0_BOOT;
cmd[1] = MIP4_R1_BOOT_CMD;
cmd[2] = MIP4_BOOT_CMD_PROGRAM;
ret = i2c_master_send(ts->client, cmd, 3);
if (ret != 3) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to send 'write' command: %d\n", error);
goto out;
}
/* Status */
error = mip4_bl_read_status(ts);
out:
kfree(data_buf);
return error ? error : 0;
}
static int mip4_bl_verify_page(struct mip4_ts *ts, int offset,
const u8 *data, int length, int buf_addr)
{
u8 cmd[8];
u8 *read_buf;
int buf_offset;
struct i2c_msg msg[] = {
{
.addr = ts->client->addr,
.flags = 0,
.buf = cmd,
.len = 2,
}, {
.addr = ts->client->addr,
.flags = I2C_M_RD,
.len = MIP4_BL_PACKET_SIZE,
},
};
int ret;
int error;
dev_dbg(&ts->client->dev, "Validating page @%#06x (%d)\n",
offset, length);
/* Addr */
cmd[0] = MIP4_R0_BOOT;
cmd[1] = MIP4_R1_BOOT_TARGET_ADDR;
put_unaligned_le32(offset, &cmd[2]);
ret = i2c_master_send(ts->client, cmd, 6);
if (ret != 6) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to send read page address: %d\n", error);
return error;
}
/* Size */
cmd[0] = MIP4_R0_BOOT;
cmd[1] = MIP4_R1_BOOT_SIZE;
put_unaligned_le32(length, &cmd[2]);
ret = i2c_master_send(ts->client, cmd, 6);
if (ret != 6) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to send read page size: %d\n", error);
return error;
}
/* Command */
cmd[0] = MIP4_R0_BOOT;
cmd[1] = MIP4_R1_BOOT_CMD;
cmd[2] = MIP4_BOOT_CMD_READ;
ret = i2c_master_send(ts->client, cmd, 3);
if (ret != 3) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to send 'read' command: %d\n", error);
return error;
}
/* Status */
error = mip4_bl_read_status(ts);
if (error)
return error;
/* Read */
msg[1].buf = read_buf = kmalloc(MIP4_BL_PACKET_SIZE, GFP_KERNEL);
if (!read_buf)
return -ENOMEM;
for (buf_offset = 0;
buf_offset < length;
buf_offset += MIP4_BL_PACKET_SIZE) {
dev_dbg(&ts->client->dev,
"reading chunk at %#04x (size %d)\n",
buf_offset, MIP4_BL_PACKET_SIZE);
put_unaligned_be16(buf_addr + buf_offset, cmd);
ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
if (ret != ARRAY_SIZE(msg)) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to read chunk at %#04x (size %d): %d\n",
buf_offset, MIP4_BL_PACKET_SIZE, error);
break;
}
if (memcmp(&data[buf_offset], read_buf, MIP4_BL_PACKET_SIZE)) {
dev_err(&ts->client->dev,
"Failed to validate chunk at %#04x (size %d)\n",
buf_offset, MIP4_BL_PACKET_SIZE);
#if MIP4_FW_UPDATE_DEBUG
print_hex_dump(KERN_DEBUG,
MIP4_DEVICE_NAME " F/W File: ",
DUMP_PREFIX_OFFSET, 16, 1,
data + offset, MIP4_BL_PACKET_SIZE,
false);
print_hex_dump(KERN_DEBUG,
MIP4_DEVICE_NAME " F/W Chip: ",
DUMP_PREFIX_OFFSET, 16, 1,
read_buf, MIP4_BL_PAGE_SIZE, false);
#endif
error = -EINVAL;
break;
}
}
kfree(read_buf);
return error ? error : 0;
}
/*
* Flash chip firmware
*/
static int mip4_flash_fw(struct mip4_ts *ts,
const u8 *fw_data, u32 fw_size, u32 fw_offset)
{
struct i2c_client *client = ts->client;
int offset;
u16 buf_addr;
int error, error2;
/* Enter bootloader mode */
dev_dbg(&client->dev, "Entering bootloader mode\n");
error = mip4_bl_enter(ts);
if (error) {
dev_err(&client->dev,
"Failed to enter bootloader mode: %d\n",
error);
return error;
}
/* Read info */
error = mip4_bl_get_address(ts, &buf_addr);
if (error)
goto exit_bl;
/* Program & Verify */
dev_dbg(&client->dev,
"Program & Verify, page size: %d, packet size: %d\n",
MIP4_BL_PAGE_SIZE, MIP4_BL_PACKET_SIZE);
for (offset = fw_offset;
offset < fw_offset + fw_size;
offset += MIP4_BL_PAGE_SIZE) {
/* Program */
error = mip4_bl_program_page(ts, offset, fw_data + offset,
MIP4_BL_PAGE_SIZE, buf_addr);
if (error)
break;
/* Verify */
error = mip4_bl_verify_page(ts, offset, fw_data + offset,
MIP4_BL_PAGE_SIZE, buf_addr);
if (error)
break;
}
exit_bl:
/* Exit bootloader mode */
dev_dbg(&client->dev, "Exiting bootloader mode\n");
error2 = mip4_bl_exit(ts);
if (error2) {
dev_err(&client->dev,
"Failed to exit bootloader mode: %d\n", error2);
if (!error)
error = error2;
}
/* Reset chip */
mip4_power_off(ts);
mip4_power_on(ts);
mip4_query_device(ts);
/* Refresh device parameters */
input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, ts->max_x, 0, 0);
input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, ts->max_y, 0, 0);
input_set_abs_params(ts->input, ABS_X, 0, ts->max_x, 0, 0);
input_set_abs_params(ts->input, ABS_Y, 0, ts->max_y, 0, 0);
input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->ppm_x);
input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->ppm_y);
input_abs_set_res(ts->input, ABS_X, ts->ppm_x);
input_abs_set_res(ts->input, ABS_Y, ts->ppm_y);
return error ? error : 0;
}
static int mip4_parse_firmware(struct mip4_ts *ts, const struct firmware *fw,
u32 *fw_offset_start, u32 *fw_size,
const struct mip4_bin_tail **pfw_info)
{
const struct mip4_bin_tail *fw_info;
struct mip4_fw_version fw_version;
u16 tail_size;
if (fw->size < MIP4_BIN_TAIL_SIZE) {
dev_err(&ts->client->dev,
"Invalid firmware, size mismatch (tail %zd vs %zd)\n",
MIP4_BIN_TAIL_SIZE, fw->size);
return -EINVAL;
}
fw_info = (const void *)&fw->data[fw->size - MIP4_BIN_TAIL_SIZE];
#if MIP4_FW_UPDATE_DEBUG
print_hex_dump(KERN_ERR, MIP4_DEVICE_NAME " Bin Info: ",
DUMP_PREFIX_OFFSET, 16, 1, *fw_info, tail_size, false);
#endif
tail_size = get_unaligned_le16(&fw_info->tail_size);
if (tail_size != MIP4_BIN_TAIL_SIZE) {
dev_err(&ts->client->dev,
"wrong tail size: %d (expected %zd)\n",
tail_size, MIP4_BIN_TAIL_SIZE);
return -EINVAL;
}
/* Check bin format */
if (memcmp(fw_info->tail_mark, MIP4_BIN_TAIL_MARK,
sizeof(fw_info->tail_mark))) {
dev_err(&ts->client->dev,
"unable to locate tail marker (%*ph vs %*ph)\n",
(int)sizeof(fw_info->tail_mark), fw_info->tail_mark,
(int)sizeof(fw_info->tail_mark), MIP4_BIN_TAIL_MARK);
return -EINVAL;
}
*fw_offset_start = get_unaligned_le32(&fw_info->bin_start_addr);
*fw_size = get_unaligned_le32(&fw_info->bin_length);
dev_dbg(&ts->client->dev,
"F/W Data offset: %#08x, size: %d\n",
*fw_offset_start, *fw_size);
if (*fw_size % MIP4_BL_PAGE_SIZE) {
dev_err(&ts->client->dev,
"encoded fw length %d is not multiple of pages (%d)\n",
*fw_size, MIP4_BL_PAGE_SIZE);
return -EINVAL;
}
if (fw->size != *fw_offset_start + *fw_size) {
dev_err(&ts->client->dev,
"Wrong firmware size, expected %d bytes, got %zd\n",
*fw_offset_start + *fw_size, fw->size);
return -EINVAL;
}
mip4_parse_fw_version((const u8 *)&fw_info->ver_boot, &fw_version);
dev_dbg(&ts->client->dev,
"F/W file version %04X %04X %04X %04X\n",
fw_version.boot, fw_version.core,
fw_version.app, fw_version.param);
dev_dbg(&ts->client->dev, "F/W chip version: %04X %04X %04X %04X\n",
ts->fw_version.boot, ts->fw_version.core,
ts->fw_version.app, ts->fw_version.param);
/* Check F/W type */
if (fw_version.boot != 0xEEEE && fw_version.boot != 0xFFFF &&
fw_version.core == 0xEEEE &&
fw_version.app == 0xEEEE &&
fw_version.param == 0xEEEE) {
dev_dbg(&ts->client->dev, "F/W type: Bootloader\n");
} else if (fw_version.boot == 0xEEEE &&
fw_version.core != 0xEEEE && fw_version.core != 0xFFFF &&
fw_version.app != 0xEEEE && fw_version.app != 0xFFFF &&
fw_version.param != 0xEEEE && fw_version.param != 0xFFFF) {
dev_dbg(&ts->client->dev, "F/W type: Main\n");
} else {
dev_err(&ts->client->dev, "Wrong firmware type\n");
return -EINVAL;
}
return 0;
}
static int mip4_execute_fw_update(struct mip4_ts *ts, const struct firmware *fw)
{
const struct mip4_bin_tail *fw_info;
u32 fw_start_offset;
u32 fw_size;
int retires = 3;
int error;
error = mip4_parse_firmware(ts, fw,
&fw_start_offset, &fw_size, &fw_info);
if (error)
return error;
if (input_device_enabled(ts->input)) {
disable_irq(ts->client->irq);
} else {
error = mip4_power_on(ts);
if (error)
return error;
}
/* Update firmware */
do {
error = mip4_flash_fw(ts, fw->data, fw_size, fw_start_offset);
if (!error)
break;
} while (--retires);
if (error)
dev_err(&ts->client->dev,
"Failed to flash firmware: %d\n", error);
/* Enable IRQ */
if (input_device_enabled(ts->input))
enable_irq(ts->client->irq);
else
mip4_power_off(ts);
return error ? error : 0;
}
static ssize_t mip4_sysfs_fw_update(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct mip4_ts *ts = i2c_get_clientdata(client);
const struct firmware *fw;
int error;
error = request_firmware(&fw, ts->fw_name, dev);
if (error) {
dev_err(&ts->client->dev,
"Failed to retrieve firmware %s: %d\n",
ts->fw_name, error);
return error;
}
/*
* Take input mutex to prevent racing with itself and also with
* userspace opening and closing the device and also suspend/resume
* transitions.
*/
mutex_lock(&ts->input->mutex);
error = mip4_execute_fw_update(ts, fw);
mutex_unlock(&ts->input->mutex);
release_firmware(fw);
if (error) {
dev_err(&ts->client->dev,
"Firmware update failed: %d\n", error);
return error;
}
return count;
}
static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mip4_sysfs_fw_update);
static ssize_t mip4_sysfs_read_fw_version(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct mip4_ts *ts = i2c_get_clientdata(client);
size_t count;
/* Take lock to prevent racing with firmware update */
mutex_lock(&ts->input->mutex);
count = snprintf(buf, PAGE_SIZE, "%04X %04X %04X %04X\n",
ts->fw_version.boot, ts->fw_version.core,
ts->fw_version.app, ts->fw_version.param);
mutex_unlock(&ts->input->mutex);
return count;
}
static DEVICE_ATTR(fw_version, S_IRUGO, mip4_sysfs_read_fw_version, NULL);
static ssize_t mip4_sysfs_read_hw_version(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct mip4_ts *ts = i2c_get_clientdata(client);
size_t count;
/* Take lock to prevent racing with firmware update */
mutex_lock(&ts->input->mutex);
/*
* product_name shows the name or version of the hardware
* paired with current firmware in the chip.
*/
count = snprintf(buf, PAGE_SIZE, "%.*s\n",
(int)sizeof(ts->product_name), ts->product_name);
mutex_unlock(&ts->input->mutex);
return count;
}
static DEVICE_ATTR(hw_version, S_IRUGO, mip4_sysfs_read_hw_version, NULL);
static ssize_t mip4_sysfs_read_product_id(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct mip4_ts *ts = i2c_get_clientdata(client);
size_t count;
mutex_lock(&ts->input->mutex);
count = snprintf(buf, PAGE_SIZE, "%04X\n", ts->product_id);
mutex_unlock(&ts->input->mutex);
return count;
}
static DEVICE_ATTR(product_id, S_IRUGO, mip4_sysfs_read_product_id, NULL);
static ssize_t mip4_sysfs_read_ic_name(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct mip4_ts *ts = i2c_get_clientdata(client);
size_t count;
mutex_lock(&ts->input->mutex);
count = snprintf(buf, PAGE_SIZE, "%.*s\n",
(int)sizeof(ts->ic_name), ts->ic_name);
mutex_unlock(&ts->input->mutex);
return count;
}
static DEVICE_ATTR(ic_name, S_IRUGO, mip4_sysfs_read_ic_name, NULL);
static struct attribute *mip4_attrs[] = {
&dev_attr_fw_version.attr,
&dev_attr_hw_version.attr,
&dev_attr_product_id.attr,
&dev_attr_ic_name.attr,
&dev_attr_update_fw.attr,
NULL,
};
static const struct attribute_group mip4_attr_group = {
.attrs = mip4_attrs,
};
static int mip4_probe(struct i2c_client *client)
{
struct mip4_ts *ts;
struct input_dev *input;
int error;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "Not supported I2C adapter\n");
return -ENXIO;
}
ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
input = devm_input_allocate_device(&client->dev);
if (!input)
return -ENOMEM;
ts->client = client;
ts->input = input;
snprintf(ts->phys, sizeof(ts->phys),
"%s/input0", dev_name(&client->dev));
ts->gpio_ce = devm_gpiod_get_optional(&client->dev,
"ce", GPIOD_OUT_LOW);
if (IS_ERR(ts->gpio_ce))
return dev_err_probe(&client->dev, PTR_ERR(ts->gpio_ce), "Failed to get gpio\n");
error = mip4_power_on(ts);
if (error)
return error;
error = mip4_query_device(ts);
mip4_power_off(ts);
if (error)
return error;
input->name = "MELFAS MIP4 Touchscreen";
input->phys = ts->phys;
input->id.bustype = BUS_I2C;
input->id.vendor = 0x13c5;
input->id.product = ts->product_id;
input->open = mip4_input_open;
input->close = mip4_input_close;
input_set_drvdata(input, ts);
input->keycode = ts->key_code;
input->keycodesize = sizeof(*ts->key_code);
input->keycodemax = ts->key_num;
input_set_abs_params(input, ABS_MT_TOOL_TYPE, 0, MT_TOOL_PALM, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_X, 0, ts->max_x, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0, ts->max_y, 0, 0);
input_set_abs_params(input, ABS_MT_PRESSURE,
MIP4_PRESSURE_MIN, MIP4_PRESSURE_MAX, 0, 0);
input_set_abs_params(input, ABS_MT_TOUCH_MAJOR,
MIP4_TOUCH_MAJOR_MIN, MIP4_TOUCH_MAJOR_MAX, 0, 0);
input_set_abs_params(input, ABS_MT_TOUCH_MINOR,
MIP4_TOUCH_MINOR_MIN, MIP4_TOUCH_MINOR_MAX, 0, 0);
input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->ppm_x);
input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->ppm_y);
error = input_mt_init_slots(input, MIP4_MAX_FINGERS, INPUT_MT_DIRECT);
if (error)
return error;
i2c_set_clientdata(client, ts);
error = devm_request_threaded_irq(&client->dev, client->irq,
NULL, mip4_interrupt,
IRQF_ONESHOT | IRQF_NO_AUTOEN,
MIP4_DEVICE_NAME, ts);
if (error) {
dev_err(&client->dev,
"Failed to request interrupt %d: %d\n",
client->irq, error);
return error;
}
error = input_register_device(input);
if (error) {
dev_err(&client->dev,
"Failed to register input device: %d\n", error);
return error;
}
error = devm_device_add_group(&client->dev, &mip4_attr_group);
if (error) {
dev_err(&client->dev,
"Failed to create sysfs attribute group: %d\n", error);
return error;
}
return 0;
}
static int mip4_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct mip4_ts *ts = i2c_get_clientdata(client);
struct input_dev *input = ts->input;
mutex_lock(&input->mutex);
if (device_may_wakeup(dev))
ts->wake_irq_enabled = enable_irq_wake(client->irq) == 0;
else if (input_device_enabled(input))
mip4_disable(ts);
mutex_unlock(&input->mutex);
return 0;
}
static int mip4_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct mip4_ts *ts = i2c_get_clientdata(client);
struct input_dev *input = ts->input;
mutex_lock(&input->mutex);
if (ts->wake_irq_enabled)
disable_irq_wake(client->irq);
else if (input_device_enabled(input))
mip4_enable(ts);
mutex_unlock(&input->mutex);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(mip4_pm_ops, mip4_suspend, mip4_resume);
#ifdef CONFIG_OF
static const struct of_device_id mip4_of_match[] = {
{ .compatible = "melfas,"MIP4_DEVICE_NAME, },
{ },
};
MODULE_DEVICE_TABLE(of, mip4_of_match);
#endif
#ifdef CONFIG_ACPI
static const struct acpi_device_id mip4_acpi_match[] = {
{ "MLFS0000", 0},
{ },
};
MODULE_DEVICE_TABLE(acpi, mip4_acpi_match);
#endif
static const struct i2c_device_id mip4_i2c_ids[] = {
{ MIP4_DEVICE_NAME, 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, mip4_i2c_ids);
static struct i2c_driver mip4_driver = {
.id_table = mip4_i2c_ids,
.probe = mip4_probe,
.driver = {
.name = MIP4_DEVICE_NAME,
.of_match_table = of_match_ptr(mip4_of_match),
.acpi_match_table = ACPI_PTR(mip4_acpi_match),
.pm = pm_sleep_ptr(&mip4_pm_ops),
},
};
module_i2c_driver(mip4_driver);
MODULE_DESCRIPTION("MELFAS MIP4 Touchscreen");
MODULE_AUTHOR("Sangwon Jee <[email protected]>");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/melfas_mip4.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Microchip AR1020 and AR1021 driver for I2C
*
* Author: Christian Gmeiner <[email protected]>
*/
#include <linux/bitops.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/of.h>
#include <linux/i2c.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#define AR1021_TOUCH_PKG_SIZE 5
#define AR1021_MAX_X 4095
#define AR1021_MAX_Y 4095
#define AR1021_CMD 0x55
#define AR1021_CMD_ENABLE_TOUCH 0x12
struct ar1021_i2c {
struct i2c_client *client;
struct input_dev *input;
u8 data[AR1021_TOUCH_PKG_SIZE];
};
static irqreturn_t ar1021_i2c_irq(int irq, void *dev_id)
{
struct ar1021_i2c *ar1021 = dev_id;
struct input_dev *input = ar1021->input;
u8 *data = ar1021->data;
unsigned int x, y, button;
int retval;
retval = i2c_master_recv(ar1021->client,
ar1021->data, sizeof(ar1021->data));
if (retval != sizeof(ar1021->data))
goto out;
/* sync bit set ? */
if (!(data[0] & BIT(7)))
goto out;
button = data[0] & BIT(0);
x = ((data[2] & 0x1f) << 7) | (data[1] & 0x7f);
y = ((data[4] & 0x1f) << 7) | (data[3] & 0x7f);
input_report_abs(input, ABS_X, x);
input_report_abs(input, ABS_Y, y);
input_report_key(input, BTN_TOUCH, button);
input_sync(input);
out:
return IRQ_HANDLED;
}
static int ar1021_i2c_open(struct input_dev *dev)
{
static const u8 cmd_enable_touch[] = {
AR1021_CMD,
0x01, /* number of bytes after this */
AR1021_CMD_ENABLE_TOUCH
};
struct ar1021_i2c *ar1021 = input_get_drvdata(dev);
struct i2c_client *client = ar1021->client;
int error;
error = i2c_master_send(ar1021->client, cmd_enable_touch,
sizeof(cmd_enable_touch));
if (error < 0)
return error;
enable_irq(client->irq);
return 0;
}
static void ar1021_i2c_close(struct input_dev *dev)
{
struct ar1021_i2c *ar1021 = input_get_drvdata(dev);
struct i2c_client *client = ar1021->client;
disable_irq(client->irq);
}
static int ar1021_i2c_probe(struct i2c_client *client)
{
struct ar1021_i2c *ar1021;
struct input_dev *input;
int error;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "i2c_check_functionality error\n");
return -ENXIO;
}
ar1021 = devm_kzalloc(&client->dev, sizeof(*ar1021), GFP_KERNEL);
if (!ar1021)
return -ENOMEM;
input = devm_input_allocate_device(&client->dev);
if (!input)
return -ENOMEM;
ar1021->client = client;
ar1021->input = input;
input->name = "ar1021 I2C Touchscreen";
input->id.bustype = BUS_I2C;
input->dev.parent = &client->dev;
input->open = ar1021_i2c_open;
input->close = ar1021_i2c_close;
__set_bit(INPUT_PROP_DIRECT, input->propbit);
input_set_capability(input, EV_KEY, BTN_TOUCH);
input_set_abs_params(input, ABS_X, 0, AR1021_MAX_X, 0, 0);
input_set_abs_params(input, ABS_Y, 0, AR1021_MAX_Y, 0, 0);
input_set_drvdata(input, ar1021);
error = devm_request_threaded_irq(&client->dev, client->irq,
NULL, ar1021_i2c_irq,
IRQF_ONESHOT | IRQF_NO_AUTOEN,
"ar1021_i2c", ar1021);
if (error) {
dev_err(&client->dev,
"Failed to enable IRQ, error: %d\n", error);
return error;
}
error = input_register_device(ar1021->input);
if (error) {
dev_err(&client->dev,
"Failed to register input device, error: %d\n", error);
return error;
}
return 0;
}
static int ar1021_i2c_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
disable_irq(client->irq);
return 0;
}
static int ar1021_i2c_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
enable_irq(client->irq);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(ar1021_i2c_pm,
ar1021_i2c_suspend, ar1021_i2c_resume);
static const struct i2c_device_id ar1021_i2c_id[] = {
{ "ar1021", 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, ar1021_i2c_id);
static const struct of_device_id ar1021_i2c_of_match[] = {
{ .compatible = "microchip,ar1021-i2c", },
{ }
};
MODULE_DEVICE_TABLE(of, ar1021_i2c_of_match);
static struct i2c_driver ar1021_i2c_driver = {
.driver = {
.name = "ar1021_i2c",
.pm = pm_sleep_ptr(&ar1021_i2c_pm),
.of_match_table = ar1021_i2c_of_match,
},
.probe = ar1021_i2c_probe,
.id_table = ar1021_i2c_id,
};
module_i2c_driver(ar1021_i2c_driver);
MODULE_AUTHOR("Christian Gmeiner <[email protected]>");
MODULE_DESCRIPTION("Microchip AR1020 and AR1021 I2C Driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/ar1021_i2c.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Touchscreen driver for Marvell 88PM860x
*
* Copyright (C) 2009 Marvell International Ltd.
* Haojian Zhuang <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/mfd/88pm860x.h>
#include <linux/slab.h>
#include <linux/device.h>
#define MEAS_LEN (8)
#define ACCURATE_BIT (12)
/* touch register */
#define MEAS_EN3 (0x52)
#define MEAS_TSIX_1 (0x8D)
#define MEAS_TSIX_2 (0x8E)
#define MEAS_TSIY_1 (0x8F)
#define MEAS_TSIY_2 (0x90)
#define MEAS_TSIZ1_1 (0x91)
#define MEAS_TSIZ1_2 (0x92)
#define MEAS_TSIZ2_1 (0x93)
#define MEAS_TSIZ2_2 (0x94)
/* bit definitions of touch */
#define MEAS_PD_EN (1 << 3)
#define MEAS_TSIX_EN (1 << 4)
#define MEAS_TSIY_EN (1 << 5)
#define MEAS_TSIZ1_EN (1 << 6)
#define MEAS_TSIZ2_EN (1 << 7)
struct pm860x_touch {
struct input_dev *idev;
struct i2c_client *i2c;
struct pm860x_chip *chip;
int irq;
int res_x; /* resistor of Xplate */
};
static irqreturn_t pm860x_touch_handler(int irq, void *data)
{
struct pm860x_touch *touch = data;
struct pm860x_chip *chip = touch->chip;
unsigned char buf[MEAS_LEN];
int x, y, pen_down;
int z1, z2, rt = 0;
int ret;
ret = pm860x_bulk_read(touch->i2c, MEAS_TSIX_1, MEAS_LEN, buf);
if (ret < 0)
goto out;
pen_down = buf[1] & (1 << 6);
x = ((buf[0] & 0xFF) << 4) | (buf[1] & 0x0F);
y = ((buf[2] & 0xFF) << 4) | (buf[3] & 0x0F);
z1 = ((buf[4] & 0xFF) << 4) | (buf[5] & 0x0F);
z2 = ((buf[6] & 0xFF) << 4) | (buf[7] & 0x0F);
if (pen_down) {
if ((x != 0) && (z1 != 0) && (touch->res_x != 0)) {
rt = z2 / z1 - 1;
rt = (rt * touch->res_x * x) >> ACCURATE_BIT;
dev_dbg(chip->dev, "z1:%d, z2:%d, rt:%d\n",
z1, z2, rt);
}
input_report_abs(touch->idev, ABS_X, x);
input_report_abs(touch->idev, ABS_Y, y);
input_report_abs(touch->idev, ABS_PRESSURE, rt);
input_report_key(touch->idev, BTN_TOUCH, 1);
dev_dbg(chip->dev, "pen down at [%d, %d].\n", x, y);
} else {
input_report_abs(touch->idev, ABS_PRESSURE, 0);
input_report_key(touch->idev, BTN_TOUCH, 0);
dev_dbg(chip->dev, "pen release\n");
}
input_sync(touch->idev);
out:
return IRQ_HANDLED;
}
static int pm860x_touch_open(struct input_dev *dev)
{
struct pm860x_touch *touch = input_get_drvdata(dev);
int data, ret;
data = MEAS_PD_EN | MEAS_TSIX_EN | MEAS_TSIY_EN
| MEAS_TSIZ1_EN | MEAS_TSIZ2_EN;
ret = pm860x_set_bits(touch->i2c, MEAS_EN3, data, data);
if (ret < 0)
goto out;
return 0;
out:
return ret;
}
static void pm860x_touch_close(struct input_dev *dev)
{
struct pm860x_touch *touch = input_get_drvdata(dev);
int data;
data = MEAS_PD_EN | MEAS_TSIX_EN | MEAS_TSIY_EN
| MEAS_TSIZ1_EN | MEAS_TSIZ2_EN;
pm860x_set_bits(touch->i2c, MEAS_EN3, data, 0);
}
#ifdef CONFIG_OF
static int pm860x_touch_dt_init(struct platform_device *pdev,
struct pm860x_chip *chip,
int *res_x)
{
struct device_node *np = pdev->dev.parent->of_node;
struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
: chip->companion;
int data, n, ret;
if (!np)
return -ENODEV;
np = of_get_child_by_name(np, "touch");
if (!np) {
dev_err(&pdev->dev, "Can't find touch node\n");
return -EINVAL;
}
/* set GPADC MISC1 register */
data = 0;
if (!of_property_read_u32(np, "marvell,88pm860x-gpadc-prebias", &n))
data |= (n << 1) & PM8607_GPADC_PREBIAS_MASK;
if (!of_property_read_u32(np, "marvell,88pm860x-gpadc-slot-cycle", &n))
data |= (n << 3) & PM8607_GPADC_SLOT_CYCLE_MASK;
if (!of_property_read_u32(np, "marvell,88pm860x-gpadc-off-scale", &n))
data |= (n << 5) & PM8607_GPADC_OFF_SCALE_MASK;
if (!of_property_read_u32(np, "marvell,88pm860x-gpadc-sw-cal", &n))
data |= (n << 7) & PM8607_GPADC_SW_CAL_MASK;
if (data) {
ret = pm860x_reg_write(i2c, PM8607_GPADC_MISC1, data);
if (ret < 0)
goto err_put_node;
}
/* set tsi prebias time */
if (!of_property_read_u32(np, "marvell,88pm860x-tsi-prebias", &data)) {
ret = pm860x_reg_write(i2c, PM8607_TSI_PREBIAS, data);
if (ret < 0)
goto err_put_node;
}
/* set prebias & prechg time of pen detect */
data = 0;
if (!of_property_read_u32(np, "marvell,88pm860x-pen-prebias", &n))
data |= n & PM8607_PD_PREBIAS_MASK;
if (!of_property_read_u32(np, "marvell,88pm860x-pen-prechg", &n))
data |= n & PM8607_PD_PRECHG_MASK;
if (data) {
ret = pm860x_reg_write(i2c, PM8607_PD_PREBIAS, data);
if (ret < 0)
goto err_put_node;
}
of_property_read_u32(np, "marvell,88pm860x-resistor-X", res_x);
of_node_put(np);
return 0;
err_put_node:
of_node_put(np);
return -EINVAL;
}
#else
#define pm860x_touch_dt_init(x, y, z) (-1)
#endif
static int pm860x_touch_probe(struct platform_device *pdev)
{
struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
struct pm860x_touch_pdata *pdata = dev_get_platdata(&pdev->dev);
struct pm860x_touch *touch;
struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
: chip->companion;
int irq, ret, res_x = 0, data = 0;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return -EINVAL;
if (pm860x_touch_dt_init(pdev, chip, &res_x)) {
if (pdata) {
/* set GPADC MISC1 register */
data = 0;
data |= (pdata->gpadc_prebias << 1)
& PM8607_GPADC_PREBIAS_MASK;
data |= (pdata->slot_cycle << 3)
& PM8607_GPADC_SLOT_CYCLE_MASK;
data |= (pdata->off_scale << 5)
& PM8607_GPADC_OFF_SCALE_MASK;
data |= (pdata->sw_cal << 7)
& PM8607_GPADC_SW_CAL_MASK;
if (data) {
ret = pm860x_reg_write(i2c,
PM8607_GPADC_MISC1, data);
if (ret < 0)
return -EINVAL;
}
/* set tsi prebias time */
if (pdata->tsi_prebias) {
data = pdata->tsi_prebias;
ret = pm860x_reg_write(i2c,
PM8607_TSI_PREBIAS, data);
if (ret < 0)
return -EINVAL;
}
/* set prebias & prechg time of pen detect */
data = 0;
data |= pdata->pen_prebias
& PM8607_PD_PREBIAS_MASK;
data |= (pdata->pen_prechg << 5)
& PM8607_PD_PRECHG_MASK;
if (data) {
ret = pm860x_reg_write(i2c,
PM8607_PD_PREBIAS, data);
if (ret < 0)
return -EINVAL;
}
res_x = pdata->res_x;
} else {
dev_err(&pdev->dev, "failed to get platform data\n");
return -EINVAL;
}
}
/* enable GPADC */
ret = pm860x_set_bits(i2c, PM8607_GPADC_MISC1, PM8607_GPADC_EN,
PM8607_GPADC_EN);
if (ret)
return ret;
touch = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_touch),
GFP_KERNEL);
if (!touch)
return -ENOMEM;
touch->idev = devm_input_allocate_device(&pdev->dev);
if (!touch->idev) {
dev_err(&pdev->dev, "Failed to allocate input device!\n");
return -ENOMEM;
}
touch->idev->name = "88pm860x-touch";
touch->idev->phys = "88pm860x/input0";
touch->idev->id.bustype = BUS_I2C;
touch->idev->dev.parent = &pdev->dev;
touch->idev->open = pm860x_touch_open;
touch->idev->close = pm860x_touch_close;
touch->chip = chip;
touch->i2c = i2c;
touch->irq = irq;
touch->res_x = res_x;
input_set_drvdata(touch->idev, touch);
ret = devm_request_threaded_irq(&pdev->dev, touch->irq, NULL,
pm860x_touch_handler, IRQF_ONESHOT,
"touch", touch);
if (ret < 0)
return ret;
__set_bit(EV_ABS, touch->idev->evbit);
__set_bit(ABS_X, touch->idev->absbit);
__set_bit(ABS_Y, touch->idev->absbit);
__set_bit(ABS_PRESSURE, touch->idev->absbit);
__set_bit(EV_SYN, touch->idev->evbit);
__set_bit(EV_KEY, touch->idev->evbit);
__set_bit(BTN_TOUCH, touch->idev->keybit);
input_set_abs_params(touch->idev, ABS_X, 0, 1 << ACCURATE_BIT, 0, 0);
input_set_abs_params(touch->idev, ABS_Y, 0, 1 << ACCURATE_BIT, 0, 0);
input_set_abs_params(touch->idev, ABS_PRESSURE, 0, 1 << ACCURATE_BIT,
0, 0);
ret = input_register_device(touch->idev);
if (ret < 0) {
dev_err(chip->dev, "Failed to register touch!\n");
return ret;
}
return 0;
}
static struct platform_driver pm860x_touch_driver = {
.driver = {
.name = "88pm860x-touch",
},
.probe = pm860x_touch_probe,
};
module_platform_driver(pm860x_touch_driver);
MODULE_DESCRIPTION("Touchscreen driver for Marvell Semiconductor 88PM860x");
MODULE_AUTHOR("Haojian Zhuang <[email protected]>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:88pm860x-touch");
|
linux-master
|
drivers/input/touchscreen/88pm860x-ts.c
|
/*
* Touchscreen driver for the TS-4800 board
*
* Copyright (c) 2015 - Savoir-faire Linux
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/bitops.h>
#include <linux/input.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
/* polling interval in ms */
#define POLL_INTERVAL 3
#define DEBOUNCE_COUNT 1
/* sensor values are 12-bit wide */
#define MAX_12BIT ((1 << 12) - 1)
#define PENDOWN_MASK 0x1
#define X_OFFSET 0x0
#define Y_OFFSET 0x2
struct ts4800_ts {
struct input_dev *input;
struct device *dev;
char phys[32];
void __iomem *base;
struct regmap *regmap;
unsigned int reg;
unsigned int bit;
bool pendown;
int debounce;
};
static int ts4800_ts_open(struct input_dev *input_dev)
{
struct ts4800_ts *ts = input_get_drvdata(input_dev);
int error;
ts->pendown = false;
ts->debounce = DEBOUNCE_COUNT;
error = regmap_update_bits(ts->regmap, ts->reg, ts->bit, ts->bit);
if (error) {
dev_warn(ts->dev, "Failed to enable touchscreen: %d\n", error);
return error;
}
return 0;
}
static void ts4800_ts_close(struct input_dev *input_dev)
{
struct ts4800_ts *ts = input_get_drvdata(input_dev);
int ret;
ret = regmap_update_bits(ts->regmap, ts->reg, ts->bit, 0);
if (ret)
dev_warn(ts->dev, "Failed to disable touchscreen\n");
}
static void ts4800_ts_poll(struct input_dev *input_dev)
{
struct ts4800_ts *ts = input_get_drvdata(input_dev);
u16 last_x = readw(ts->base + X_OFFSET);
u16 last_y = readw(ts->base + Y_OFFSET);
bool pendown = last_x & PENDOWN_MASK;
if (pendown) {
if (ts->debounce) {
ts->debounce--;
return;
}
if (!ts->pendown) {
input_report_key(input_dev, BTN_TOUCH, 1);
ts->pendown = true;
}
last_x = ((~last_x) >> 4) & MAX_12BIT;
last_y = ((~last_y) >> 4) & MAX_12BIT;
input_report_abs(input_dev, ABS_X, last_x);
input_report_abs(input_dev, ABS_Y, last_y);
input_sync(input_dev);
} else if (ts->pendown) {
ts->pendown = false;
ts->debounce = DEBOUNCE_COUNT;
input_report_key(input_dev, BTN_TOUCH, 0);
input_sync(input_dev);
}
}
static int ts4800_parse_dt(struct platform_device *pdev,
struct ts4800_ts *ts)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct device_node *syscon_np;
u32 reg, bit;
int error;
syscon_np = of_parse_phandle(np, "syscon", 0);
if (!syscon_np) {
dev_err(dev, "no syscon property\n");
return -ENODEV;
}
ts->regmap = syscon_node_to_regmap(syscon_np);
of_node_put(syscon_np);
if (IS_ERR(ts->regmap)) {
dev_err(dev, "cannot get parent's regmap\n");
return PTR_ERR(ts->regmap);
}
error = of_property_read_u32_index(np, "syscon", 1, ®);
if (error < 0) {
dev_err(dev, "no offset in syscon\n");
return error;
}
ts->reg = reg;
error = of_property_read_u32_index(np, "syscon", 2, &bit);
if (error < 0) {
dev_err(dev, "no bit in syscon\n");
return error;
}
ts->bit = BIT(bit);
return 0;
}
static int ts4800_ts_probe(struct platform_device *pdev)
{
struct input_dev *input_dev;
struct ts4800_ts *ts;
int error;
ts = devm_kzalloc(&pdev->dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
error = ts4800_parse_dt(pdev, ts);
if (error)
return error;
ts->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(ts->base))
return PTR_ERR(ts->base);
input_dev = devm_input_allocate_device(&pdev->dev);
if (!input_dev)
return -ENOMEM;
snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&pdev->dev));
ts->input = input_dev;
ts->dev = &pdev->dev;
input_set_drvdata(input_dev, ts);
input_dev->name = "TS-4800 Touchscreen";
input_dev->phys = ts->phys;
input_dev->open = ts4800_ts_open;
input_dev->close = ts4800_ts_close;
input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
input_set_abs_params(input_dev, ABS_X, 0, MAX_12BIT, 0, 0);
input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, 0, 0);
error = input_setup_polling(input_dev, ts4800_ts_poll);
if (error) {
dev_err(&pdev->dev, "Unable to set up polling: %d\n", error);
return error;
}
input_set_poll_interval(input_dev, POLL_INTERVAL);
error = input_register_device(input_dev);
if (error) {
dev_err(&pdev->dev,
"Unable to register input device: %d\n", error);
return error;
}
return 0;
}
static const struct of_device_id ts4800_ts_of_match[] = {
{ .compatible = "technologic,ts4800-ts", },
{ },
};
MODULE_DEVICE_TABLE(of, ts4800_ts_of_match);
static struct platform_driver ts4800_ts_driver = {
.driver = {
.name = "ts4800-ts",
.of_match_table = ts4800_ts_of_match,
},
.probe = ts4800_ts_probe,
};
module_platform_driver(ts4800_ts_driver);
MODULE_AUTHOR("Damien Riegel <[email protected]>");
MODULE_DESCRIPTION("TS-4800 Touchscreen Driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:ts4800_ts");
|
linux-master
|
drivers/input/touchscreen/ts4800-ts.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2006-2008 Michael Hennerich, Analog Devices Inc.
*
* Description: AD7877 based touchscreen, sensor (ADCs), DAC and GPIO driver
* Based on: ads7846.c
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
* History:
* Copyright (c) 2005 David Brownell
* Copyright (c) 2006 Nokia Corporation
* Various changes: Imre Deak <[email protected]>
*
* Using code from:
* - corgi_ts.c
* Copyright (C) 2004-2005 Richard Purdie
* - omap_ts.[hc], ads7846.h, ts_osk.c
* Copyright (C) 2002 MontaVista Software
* Copyright (C) 2004 Texas Instruments
* Copyright (C) 2005 Dirk Behme
*/
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>
#include <linux/spi/ad7877.h>
#include <linux/module.h>
#include <asm/irq.h>
#define TS_PEN_UP_TIMEOUT msecs_to_jiffies(100)
#define MAX_SPI_FREQ_HZ 20000000
#define MAX_12BIT ((1<<12)-1)
#define AD7877_REG_ZEROS 0
#define AD7877_REG_CTRL1 1
#define AD7877_REG_CTRL2 2
#define AD7877_REG_ALERT 3
#define AD7877_REG_AUX1HIGH 4
#define AD7877_REG_AUX1LOW 5
#define AD7877_REG_BAT1HIGH 6
#define AD7877_REG_BAT1LOW 7
#define AD7877_REG_BAT2HIGH 8
#define AD7877_REG_BAT2LOW 9
#define AD7877_REG_TEMP1HIGH 10
#define AD7877_REG_TEMP1LOW 11
#define AD7877_REG_SEQ0 12
#define AD7877_REG_SEQ1 13
#define AD7877_REG_DAC 14
#define AD7877_REG_NONE1 15
#define AD7877_REG_EXTWRITE 15
#define AD7877_REG_XPLUS 16
#define AD7877_REG_YPLUS 17
#define AD7877_REG_Z2 18
#define AD7877_REG_aux1 19
#define AD7877_REG_aux2 20
#define AD7877_REG_aux3 21
#define AD7877_REG_bat1 22
#define AD7877_REG_bat2 23
#define AD7877_REG_temp1 24
#define AD7877_REG_temp2 25
#define AD7877_REG_Z1 26
#define AD7877_REG_GPIOCTRL1 27
#define AD7877_REG_GPIOCTRL2 28
#define AD7877_REG_GPIODATA 29
#define AD7877_REG_NONE2 30
#define AD7877_REG_NONE3 31
#define AD7877_SEQ_YPLUS_BIT (1<<11)
#define AD7877_SEQ_XPLUS_BIT (1<<10)
#define AD7877_SEQ_Z2_BIT (1<<9)
#define AD7877_SEQ_AUX1_BIT (1<<8)
#define AD7877_SEQ_AUX2_BIT (1<<7)
#define AD7877_SEQ_AUX3_BIT (1<<6)
#define AD7877_SEQ_BAT1_BIT (1<<5)
#define AD7877_SEQ_BAT2_BIT (1<<4)
#define AD7877_SEQ_TEMP1_BIT (1<<3)
#define AD7877_SEQ_TEMP2_BIT (1<<2)
#define AD7877_SEQ_Z1_BIT (1<<1)
enum {
AD7877_SEQ_YPOS = 0,
AD7877_SEQ_XPOS = 1,
AD7877_SEQ_Z2 = 2,
AD7877_SEQ_AUX1 = 3,
AD7877_SEQ_AUX2 = 4,
AD7877_SEQ_AUX3 = 5,
AD7877_SEQ_BAT1 = 6,
AD7877_SEQ_BAT2 = 7,
AD7877_SEQ_TEMP1 = 8,
AD7877_SEQ_TEMP2 = 9,
AD7877_SEQ_Z1 = 10,
AD7877_NR_SENSE = 11,
};
/* DAC Register Default RANGE 0 to Vcc, Volatge Mode, DAC On */
#define AD7877_DAC_CONF 0x1
/* If gpio3 is set AUX3/GPIO3 acts as GPIO Output */
#define AD7877_EXTW_GPIO_3_CONF 0x1C4
#define AD7877_EXTW_GPIO_DATA 0x200
/* Control REG 2 */
#define AD7877_TMR(x) ((x & 0x3) << 0)
#define AD7877_REF(x) ((x & 0x1) << 2)
#define AD7877_POL(x) ((x & 0x1) << 3)
#define AD7877_FCD(x) ((x & 0x3) << 4)
#define AD7877_PM(x) ((x & 0x3) << 6)
#define AD7877_ACQ(x) ((x & 0x3) << 8)
#define AD7877_AVG(x) ((x & 0x3) << 10)
/* Control REG 1 */
#define AD7877_SER (1 << 11) /* non-differential */
#define AD7877_DFR (0 << 11) /* differential */
#define AD7877_MODE_NOC (0) /* Do not convert */
#define AD7877_MODE_SCC (1) /* Single channel conversion */
#define AD7877_MODE_SEQ0 (2) /* Sequence 0 in Slave Mode */
#define AD7877_MODE_SEQ1 (3) /* Sequence 1 in Master Mode */
#define AD7877_CHANADD(x) ((x&0xF)<<7)
#define AD7877_READADD(x) ((x)<<2)
#define AD7877_WRITEADD(x) ((x)<<12)
#define AD7877_READ_CHAN(x) (AD7877_WRITEADD(AD7877_REG_CTRL1) | AD7877_SER | \
AD7877_MODE_SCC | AD7877_CHANADD(AD7877_REG_ ## x) | \
AD7877_READADD(AD7877_REG_ ## x))
#define AD7877_MM_SEQUENCE (AD7877_SEQ_YPLUS_BIT | AD7877_SEQ_XPLUS_BIT | \
AD7877_SEQ_Z2_BIT | AD7877_SEQ_Z1_BIT)
/*
* Non-touchscreen sensors only use single-ended conversions.
*/
struct ser_req {
u16 reset;
u16 ref_on;
u16 command;
struct spi_message msg;
struct spi_transfer xfer[6];
/*
* DMA (thus cache coherency maintenance) requires the
* transfer buffers to live in their own cache lines.
*/
u16 sample ____cacheline_aligned;
};
struct ad7877 {
struct input_dev *input;
char phys[32];
struct spi_device *spi;
u16 model;
u16 vref_delay_usecs;
u16 x_plate_ohms;
u16 pressure_max;
u16 cmd_crtl1;
u16 cmd_crtl2;
u16 cmd_dummy;
u16 dac;
u8 stopacq_polarity;
u8 first_conversion_delay;
u8 acquisition_time;
u8 averaging;
u8 pen_down_acc_interval;
struct spi_transfer xfer[AD7877_NR_SENSE + 2];
struct spi_message msg;
struct mutex mutex;
bool disabled; /* P: mutex */
bool gpio3; /* P: mutex */
bool gpio4; /* P: mutex */
spinlock_t lock;
struct timer_list timer; /* P: lock */
/*
* DMA (thus cache coherency maintenance) requires the
* transfer buffers to live in their own cache lines.
*/
u16 conversion_data[AD7877_NR_SENSE] ____cacheline_aligned;
};
static bool gpio3;
module_param(gpio3, bool, 0);
MODULE_PARM_DESC(gpio3, "If gpio3 is set to 1 AUX3 acts as GPIO3");
static int ad7877_read(struct spi_device *spi, u16 reg)
{
struct ser_req *req;
int status, ret;
req = kzalloc(sizeof *req, GFP_KERNEL);
if (!req)
return -ENOMEM;
spi_message_init(&req->msg);
req->command = (u16) (AD7877_WRITEADD(AD7877_REG_CTRL1) |
AD7877_READADD(reg));
req->xfer[0].tx_buf = &req->command;
req->xfer[0].len = 2;
req->xfer[0].cs_change = 1;
req->xfer[1].rx_buf = &req->sample;
req->xfer[1].len = 2;
spi_message_add_tail(&req->xfer[0], &req->msg);
spi_message_add_tail(&req->xfer[1], &req->msg);
status = spi_sync(spi, &req->msg);
ret = status ? : req->sample;
kfree(req);
return ret;
}
static int ad7877_write(struct spi_device *spi, u16 reg, u16 val)
{
struct ser_req *req;
int status;
req = kzalloc(sizeof *req, GFP_KERNEL);
if (!req)
return -ENOMEM;
spi_message_init(&req->msg);
req->command = (u16) (AD7877_WRITEADD(reg) | (val & MAX_12BIT));
req->xfer[0].tx_buf = &req->command;
req->xfer[0].len = 2;
spi_message_add_tail(&req->xfer[0], &req->msg);
status = spi_sync(spi, &req->msg);
kfree(req);
return status;
}
static int ad7877_read_adc(struct spi_device *spi, unsigned command)
{
struct ad7877 *ts = spi_get_drvdata(spi);
struct ser_req *req;
int status;
int sample;
int i;
req = kzalloc(sizeof *req, GFP_KERNEL);
if (!req)
return -ENOMEM;
spi_message_init(&req->msg);
/* activate reference, so it has time to settle; */
req->ref_on = AD7877_WRITEADD(AD7877_REG_CTRL2) |
AD7877_POL(ts->stopacq_polarity) |
AD7877_AVG(0) | AD7877_PM(2) | AD7877_TMR(0) |
AD7877_ACQ(ts->acquisition_time) | AD7877_FCD(0);
req->reset = AD7877_WRITEADD(AD7877_REG_CTRL1) | AD7877_MODE_NOC;
req->command = (u16) command;
req->xfer[0].tx_buf = &req->reset;
req->xfer[0].len = 2;
req->xfer[0].cs_change = 1;
req->xfer[1].tx_buf = &req->ref_on;
req->xfer[1].len = 2;
req->xfer[1].delay.value = ts->vref_delay_usecs;
req->xfer[1].delay.unit = SPI_DELAY_UNIT_USECS;
req->xfer[1].cs_change = 1;
req->xfer[2].tx_buf = &req->command;
req->xfer[2].len = 2;
req->xfer[2].delay.value = ts->vref_delay_usecs;
req->xfer[2].delay.unit = SPI_DELAY_UNIT_USECS;
req->xfer[2].cs_change = 1;
req->xfer[3].rx_buf = &req->sample;
req->xfer[3].len = 2;
req->xfer[3].cs_change = 1;
req->xfer[4].tx_buf = &ts->cmd_crtl2; /*REF OFF*/
req->xfer[4].len = 2;
req->xfer[4].cs_change = 1;
req->xfer[5].tx_buf = &ts->cmd_crtl1; /*DEFAULT*/
req->xfer[5].len = 2;
/* group all the transfers together, so we can't interfere with
* reading touchscreen state; disable penirq while sampling
*/
for (i = 0; i < 6; i++)
spi_message_add_tail(&req->xfer[i], &req->msg);
status = spi_sync(spi, &req->msg);
sample = req->sample;
kfree(req);
return status ? : sample;
}
static int ad7877_process_data(struct ad7877 *ts)
{
struct input_dev *input_dev = ts->input;
unsigned Rt;
u16 x, y, z1, z2;
x = ts->conversion_data[AD7877_SEQ_XPOS] & MAX_12BIT;
y = ts->conversion_data[AD7877_SEQ_YPOS] & MAX_12BIT;
z1 = ts->conversion_data[AD7877_SEQ_Z1] & MAX_12BIT;
z2 = ts->conversion_data[AD7877_SEQ_Z2] & MAX_12BIT;
/*
* The samples processed here are already preprocessed by the AD7877.
* The preprocessing function consists of an averaging filter.
* The combination of 'first conversion delay' and averaging provides a robust solution,
* discarding the spurious noise in the signal and keeping only the data of interest.
* The size of the averaging filter is programmable. (dev.platform_data, see linux/spi/ad7877.h)
* Other user-programmable conversion controls include variable acquisition time,
* and first conversion delay. Up to 16 averages can be taken per conversion.
*/
if (likely(x && z1)) {
/* compute touch pressure resistance using equation #1 */
Rt = (z2 - z1) * x * ts->x_plate_ohms;
Rt /= z1;
Rt = (Rt + 2047) >> 12;
/*
* Sample found inconsistent, pressure is beyond
* the maximum. Don't report it to user space.
*/
if (Rt > ts->pressure_max)
return -EINVAL;
if (!timer_pending(&ts->timer))
input_report_key(input_dev, BTN_TOUCH, 1);
input_report_abs(input_dev, ABS_X, x);
input_report_abs(input_dev, ABS_Y, y);
input_report_abs(input_dev, ABS_PRESSURE, Rt);
input_sync(input_dev);
return 0;
}
return -EINVAL;
}
static inline void ad7877_ts_event_release(struct ad7877 *ts)
{
struct input_dev *input_dev = ts->input;
input_report_abs(input_dev, ABS_PRESSURE, 0);
input_report_key(input_dev, BTN_TOUCH, 0);
input_sync(input_dev);
}
static void ad7877_timer(struct timer_list *t)
{
struct ad7877 *ts = from_timer(ts, t, timer);
unsigned long flags;
spin_lock_irqsave(&ts->lock, flags);
ad7877_ts_event_release(ts);
spin_unlock_irqrestore(&ts->lock, flags);
}
static irqreturn_t ad7877_irq(int irq, void *handle)
{
struct ad7877 *ts = handle;
unsigned long flags;
int error;
error = spi_sync(ts->spi, &ts->msg);
if (error) {
dev_err(&ts->spi->dev, "spi_sync --> %d\n", error);
goto out;
}
spin_lock_irqsave(&ts->lock, flags);
error = ad7877_process_data(ts);
if (!error)
mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT);
spin_unlock_irqrestore(&ts->lock, flags);
out:
return IRQ_HANDLED;
}
static void ad7877_disable(void *data)
{
struct ad7877 *ts = data;
mutex_lock(&ts->mutex);
if (!ts->disabled) {
ts->disabled = true;
disable_irq(ts->spi->irq);
if (del_timer_sync(&ts->timer))
ad7877_ts_event_release(ts);
}
/*
* We know the chip's in lowpower mode since we always
* leave it that way after every request
*/
mutex_unlock(&ts->mutex);
}
static void ad7877_enable(struct ad7877 *ts)
{
mutex_lock(&ts->mutex);
if (ts->disabled) {
ts->disabled = false;
enable_irq(ts->spi->irq);
}
mutex_unlock(&ts->mutex);
}
#define SHOW(name) static ssize_t \
name ## _show(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct ad7877 *ts = dev_get_drvdata(dev); \
ssize_t v = ad7877_read_adc(ts->spi, \
AD7877_READ_CHAN(name)); \
if (v < 0) \
return v; \
return sprintf(buf, "%u\n", (unsigned) v); \
} \
static DEVICE_ATTR(name, S_IRUGO, name ## _show, NULL);
SHOW(aux1)
SHOW(aux2)
SHOW(aux3)
SHOW(bat1)
SHOW(bat2)
SHOW(temp1)
SHOW(temp2)
static ssize_t ad7877_disable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ad7877 *ts = dev_get_drvdata(dev);
return sprintf(buf, "%u\n", ts->disabled);
}
static ssize_t ad7877_disable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ad7877 *ts = dev_get_drvdata(dev);
unsigned int val;
int error;
error = kstrtouint(buf, 10, &val);
if (error)
return error;
if (val)
ad7877_disable(ts);
else
ad7877_enable(ts);
return count;
}
static DEVICE_ATTR(disable, 0664, ad7877_disable_show, ad7877_disable_store);
static ssize_t ad7877_dac_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ad7877 *ts = dev_get_drvdata(dev);
return sprintf(buf, "%u\n", ts->dac);
}
static ssize_t ad7877_dac_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ad7877 *ts = dev_get_drvdata(dev);
unsigned int val;
int error;
error = kstrtouint(buf, 10, &val);
if (error)
return error;
mutex_lock(&ts->mutex);
ts->dac = val & 0xFF;
ad7877_write(ts->spi, AD7877_REG_DAC, (ts->dac << 4) | AD7877_DAC_CONF);
mutex_unlock(&ts->mutex);
return count;
}
static DEVICE_ATTR(dac, 0664, ad7877_dac_show, ad7877_dac_store);
static ssize_t ad7877_gpio3_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ad7877 *ts = dev_get_drvdata(dev);
return sprintf(buf, "%u\n", ts->gpio3);
}
static ssize_t ad7877_gpio3_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ad7877 *ts = dev_get_drvdata(dev);
unsigned int val;
int error;
error = kstrtouint(buf, 10, &val);
if (error)
return error;
mutex_lock(&ts->mutex);
ts->gpio3 = !!val;
ad7877_write(ts->spi, AD7877_REG_EXTWRITE, AD7877_EXTW_GPIO_DATA |
(ts->gpio4 << 4) | (ts->gpio3 << 5));
mutex_unlock(&ts->mutex);
return count;
}
static DEVICE_ATTR(gpio3, 0664, ad7877_gpio3_show, ad7877_gpio3_store);
static ssize_t ad7877_gpio4_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ad7877 *ts = dev_get_drvdata(dev);
return sprintf(buf, "%u\n", ts->gpio4);
}
static ssize_t ad7877_gpio4_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ad7877 *ts = dev_get_drvdata(dev);
unsigned int val;
int error;
error = kstrtouint(buf, 10, &val);
if (error)
return error;
mutex_lock(&ts->mutex);
ts->gpio4 = !!val;
ad7877_write(ts->spi, AD7877_REG_EXTWRITE, AD7877_EXTW_GPIO_DATA |
(ts->gpio4 << 4) | (ts->gpio3 << 5));
mutex_unlock(&ts->mutex);
return count;
}
static DEVICE_ATTR(gpio4, 0664, ad7877_gpio4_show, ad7877_gpio4_store);
static struct attribute *ad7877_attributes[] = {
&dev_attr_temp1.attr,
&dev_attr_temp2.attr,
&dev_attr_aux1.attr,
&dev_attr_aux2.attr,
&dev_attr_aux3.attr,
&dev_attr_bat1.attr,
&dev_attr_bat2.attr,
&dev_attr_disable.attr,
&dev_attr_dac.attr,
&dev_attr_gpio3.attr,
&dev_attr_gpio4.attr,
NULL
};
static umode_t ad7877_attr_is_visible(struct kobject *kobj,
struct attribute *attr, int n)
{
umode_t mode = attr->mode;
if (attr == &dev_attr_aux3.attr) {
if (gpio3)
mode = 0;
} else if (attr == &dev_attr_gpio3.attr) {
if (!gpio3)
mode = 0;
}
return mode;
}
static const struct attribute_group ad7877_attr_group = {
.is_visible = ad7877_attr_is_visible,
.attrs = ad7877_attributes,
};
static void ad7877_setup_ts_def_msg(struct spi_device *spi, struct ad7877 *ts)
{
struct spi_message *m;
int i;
ts->cmd_crtl2 = AD7877_WRITEADD(AD7877_REG_CTRL2) |
AD7877_POL(ts->stopacq_polarity) |
AD7877_AVG(ts->averaging) | AD7877_PM(1) |
AD7877_TMR(ts->pen_down_acc_interval) |
AD7877_ACQ(ts->acquisition_time) |
AD7877_FCD(ts->first_conversion_delay);
ad7877_write(spi, AD7877_REG_CTRL2, ts->cmd_crtl2);
ts->cmd_crtl1 = AD7877_WRITEADD(AD7877_REG_CTRL1) |
AD7877_READADD(AD7877_REG_XPLUS-1) |
AD7877_MODE_SEQ1 | AD7877_DFR;
ad7877_write(spi, AD7877_REG_CTRL1, ts->cmd_crtl1);
ts->cmd_dummy = 0;
m = &ts->msg;
spi_message_init(m);
m->context = ts;
ts->xfer[0].tx_buf = &ts->cmd_crtl1;
ts->xfer[0].len = 2;
ts->xfer[0].cs_change = 1;
spi_message_add_tail(&ts->xfer[0], m);
ts->xfer[1].tx_buf = &ts->cmd_dummy; /* Send ZERO */
ts->xfer[1].len = 2;
ts->xfer[1].cs_change = 1;
spi_message_add_tail(&ts->xfer[1], m);
for (i = 0; i < AD7877_NR_SENSE; i++) {
ts->xfer[i + 2].rx_buf = &ts->conversion_data[AD7877_SEQ_YPOS + i];
ts->xfer[i + 2].len = 2;
if (i < (AD7877_NR_SENSE - 1))
ts->xfer[i + 2].cs_change = 1;
spi_message_add_tail(&ts->xfer[i + 2], m);
}
}
static int ad7877_probe(struct spi_device *spi)
{
struct ad7877 *ts;
struct input_dev *input_dev;
struct ad7877_platform_data *pdata = dev_get_platdata(&spi->dev);
int err;
u16 verify;
if (!spi->irq) {
dev_dbg(&spi->dev, "no IRQ?\n");
return -ENODEV;
}
if (!pdata) {
dev_dbg(&spi->dev, "no platform data?\n");
return -ENODEV;
}
/* don't exceed max specified SPI CLK frequency */
if (spi->max_speed_hz > MAX_SPI_FREQ_HZ) {
dev_dbg(&spi->dev, "SPI CLK %d Hz?\n",spi->max_speed_hz);
return -EINVAL;
}
spi->bits_per_word = 16;
err = spi_setup(spi);
if (err) {
dev_dbg(&spi->dev, "spi master doesn't support 16 bits/word\n");
return err;
}
ts = devm_kzalloc(&spi->dev, sizeof(struct ad7877), GFP_KERNEL);
if (!ts)
return -ENOMEM;
input_dev = devm_input_allocate_device(&spi->dev);
if (!input_dev)
return -ENOMEM;
err = devm_add_action_or_reset(&spi->dev, ad7877_disable, ts);
if (err)
return err;
spi_set_drvdata(spi, ts);
ts->spi = spi;
ts->input = input_dev;
timer_setup(&ts->timer, ad7877_timer, 0);
mutex_init(&ts->mutex);
spin_lock_init(&ts->lock);
ts->model = pdata->model ? : 7877;
ts->vref_delay_usecs = pdata->vref_delay_usecs ? : 100;
ts->x_plate_ohms = pdata->x_plate_ohms ? : 400;
ts->pressure_max = pdata->pressure_max ? : ~0;
ts->stopacq_polarity = pdata->stopacq_polarity;
ts->first_conversion_delay = pdata->first_conversion_delay;
ts->acquisition_time = pdata->acquisition_time;
ts->averaging = pdata->averaging;
ts->pen_down_acc_interval = pdata->pen_down_acc_interval;
snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&spi->dev));
input_dev->name = "AD7877 Touchscreen";
input_dev->phys = ts->phys;
input_dev->dev.parent = &spi->dev;
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(BTN_TOUCH, input_dev->keybit);
__set_bit(EV_ABS, input_dev->evbit);
__set_bit(ABS_X, input_dev->absbit);
__set_bit(ABS_Y, input_dev->absbit);
__set_bit(ABS_PRESSURE, input_dev->absbit);
input_set_abs_params(input_dev, ABS_X,
pdata->x_min ? : 0,
pdata->x_max ? : MAX_12BIT,
0, 0);
input_set_abs_params(input_dev, ABS_Y,
pdata->y_min ? : 0,
pdata->y_max ? : MAX_12BIT,
0, 0);
input_set_abs_params(input_dev, ABS_PRESSURE,
pdata->pressure_min, pdata->pressure_max, 0, 0);
ad7877_write(spi, AD7877_REG_SEQ1, AD7877_MM_SEQUENCE);
verify = ad7877_read(spi, AD7877_REG_SEQ1);
if (verify != AD7877_MM_SEQUENCE) {
dev_err(&spi->dev, "%s: Failed to probe %s\n",
dev_name(&spi->dev), input_dev->name);
return -ENODEV;
}
if (gpio3)
ad7877_write(spi, AD7877_REG_EXTWRITE, AD7877_EXTW_GPIO_3_CONF);
ad7877_setup_ts_def_msg(spi, ts);
/* Request AD7877 /DAV GPIO interrupt */
err = devm_request_threaded_irq(&spi->dev, spi->irq, NULL, ad7877_irq,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
spi->dev.driver->name, ts);
if (err) {
dev_dbg(&spi->dev, "irq %d busy?\n", spi->irq);
return err;
}
err = devm_device_add_group(&spi->dev, &ad7877_attr_group);
if (err)
return err;
err = input_register_device(input_dev);
if (err)
return err;
return 0;
}
static int ad7877_suspend(struct device *dev)
{
struct ad7877 *ts = dev_get_drvdata(dev);
ad7877_disable(ts);
return 0;
}
static int ad7877_resume(struct device *dev)
{
struct ad7877 *ts = dev_get_drvdata(dev);
ad7877_enable(ts);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(ad7877_pm, ad7877_suspend, ad7877_resume);
static struct spi_driver ad7877_driver = {
.driver = {
.name = "ad7877",
.pm = pm_sleep_ptr(&ad7877_pm),
},
.probe = ad7877_probe,
};
module_spi_driver(ad7877_driver);
MODULE_AUTHOR("Michael Hennerich <[email protected]>");
MODULE_DESCRIPTION("AD7877 touchscreen Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("spi:ad7877");
|
linux-master
|
drivers/input/touchscreen/ad7877.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* HTC Shift touchscreen driver
*
* Copyright (C) 2008 Pau Oliva Fora <[email protected]>
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/isa.h>
#include <linux/ioport.h>
#include <linux/dmi.h>
MODULE_AUTHOR("Pau Oliva Fora <[email protected]>");
MODULE_DESCRIPTION("HTC Shift touchscreen driver");
MODULE_LICENSE("GPL");
#define HTCPEN_PORT_IRQ_CLEAR 0x068
#define HTCPEN_PORT_INIT 0x06c
#define HTCPEN_PORT_INDEX 0x0250
#define HTCPEN_PORT_DATA 0x0251
#define HTCPEN_IRQ 3
#define DEVICE_ENABLE 0xa2
#define DEVICE_DISABLE 0xa3
#define X_INDEX 3
#define Y_INDEX 5
#define TOUCH_INDEX 0xb
#define LSB_XY_INDEX 0xc
#define X_AXIS_MAX 2040
#define Y_AXIS_MAX 2040
static bool invert_x;
module_param(invert_x, bool, 0644);
MODULE_PARM_DESC(invert_x, "If set, X axis is inverted");
static bool invert_y;
module_param(invert_y, bool, 0644);
MODULE_PARM_DESC(invert_y, "If set, Y axis is inverted");
static irqreturn_t htcpen_interrupt(int irq, void *handle)
{
struct input_dev *htcpen_dev = handle;
unsigned short x, y, xy;
/* 0 = press; 1 = release */
outb_p(TOUCH_INDEX, HTCPEN_PORT_INDEX);
if (inb_p(HTCPEN_PORT_DATA)) {
input_report_key(htcpen_dev, BTN_TOUCH, 0);
} else {
outb_p(X_INDEX, HTCPEN_PORT_INDEX);
x = inb_p(HTCPEN_PORT_DATA);
outb_p(Y_INDEX, HTCPEN_PORT_INDEX);
y = inb_p(HTCPEN_PORT_DATA);
outb_p(LSB_XY_INDEX, HTCPEN_PORT_INDEX);
xy = inb_p(HTCPEN_PORT_DATA);
/* get high resolution value of X and Y using LSB */
x = X_AXIS_MAX - ((x * 8) + ((xy >> 4) & 0xf));
y = (y * 8) + (xy & 0xf);
if (invert_x)
x = X_AXIS_MAX - x;
if (invert_y)
y = Y_AXIS_MAX - y;
if (x != X_AXIS_MAX && x != 0) {
input_report_key(htcpen_dev, BTN_TOUCH, 1);
input_report_abs(htcpen_dev, ABS_X, x);
input_report_abs(htcpen_dev, ABS_Y, y);
}
}
input_sync(htcpen_dev);
inb_p(HTCPEN_PORT_IRQ_CLEAR);
return IRQ_HANDLED;
}
static int htcpen_open(struct input_dev *dev)
{
outb_p(DEVICE_ENABLE, HTCPEN_PORT_INIT);
return 0;
}
static void htcpen_close(struct input_dev *dev)
{
outb_p(DEVICE_DISABLE, HTCPEN_PORT_INIT);
synchronize_irq(HTCPEN_IRQ);
}
static int htcpen_isa_probe(struct device *dev, unsigned int id)
{
struct input_dev *htcpen_dev;
int err = -EBUSY;
if (!request_region(HTCPEN_PORT_IRQ_CLEAR, 1, "htcpen")) {
printk(KERN_ERR "htcpen: unable to get IO region 0x%x\n",
HTCPEN_PORT_IRQ_CLEAR);
goto request_region1_failed;
}
if (!request_region(HTCPEN_PORT_INIT, 1, "htcpen")) {
printk(KERN_ERR "htcpen: unable to get IO region 0x%x\n",
HTCPEN_PORT_INIT);
goto request_region2_failed;
}
if (!request_region(HTCPEN_PORT_INDEX, 2, "htcpen")) {
printk(KERN_ERR "htcpen: unable to get IO region 0x%x\n",
HTCPEN_PORT_INDEX);
goto request_region3_failed;
}
htcpen_dev = input_allocate_device();
if (!htcpen_dev) {
printk(KERN_ERR "htcpen: can't allocate device\n");
err = -ENOMEM;
goto input_alloc_failed;
}
htcpen_dev->name = "HTC Shift EC TouchScreen";
htcpen_dev->id.bustype = BUS_ISA;
htcpen_dev->evbit[0] = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY);
htcpen_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_abs_params(htcpen_dev, ABS_X, 0, X_AXIS_MAX, 0, 0);
input_set_abs_params(htcpen_dev, ABS_Y, 0, Y_AXIS_MAX, 0, 0);
htcpen_dev->open = htcpen_open;
htcpen_dev->close = htcpen_close;
err = request_irq(HTCPEN_IRQ, htcpen_interrupt, 0, "htcpen",
htcpen_dev);
if (err) {
printk(KERN_ERR "htcpen: irq busy\n");
goto request_irq_failed;
}
inb_p(HTCPEN_PORT_IRQ_CLEAR);
err = input_register_device(htcpen_dev);
if (err)
goto input_register_failed;
dev_set_drvdata(dev, htcpen_dev);
return 0;
input_register_failed:
free_irq(HTCPEN_IRQ, htcpen_dev);
request_irq_failed:
input_free_device(htcpen_dev);
input_alloc_failed:
release_region(HTCPEN_PORT_INDEX, 2);
request_region3_failed:
release_region(HTCPEN_PORT_INIT, 1);
request_region2_failed:
release_region(HTCPEN_PORT_IRQ_CLEAR, 1);
request_region1_failed:
return err;
}
static void htcpen_isa_remove(struct device *dev, unsigned int id)
{
struct input_dev *htcpen_dev = dev_get_drvdata(dev);
input_unregister_device(htcpen_dev);
free_irq(HTCPEN_IRQ, htcpen_dev);
release_region(HTCPEN_PORT_INDEX, 2);
release_region(HTCPEN_PORT_INIT, 1);
release_region(HTCPEN_PORT_IRQ_CLEAR, 1);
}
#ifdef CONFIG_PM
static int htcpen_isa_suspend(struct device *dev, unsigned int n,
pm_message_t state)
{
outb_p(DEVICE_DISABLE, HTCPEN_PORT_INIT);
return 0;
}
static int htcpen_isa_resume(struct device *dev, unsigned int n)
{
outb_p(DEVICE_ENABLE, HTCPEN_PORT_INIT);
return 0;
}
#endif
static struct isa_driver htcpen_isa_driver = {
.probe = htcpen_isa_probe,
.remove = htcpen_isa_remove,
#ifdef CONFIG_PM
.suspend = htcpen_isa_suspend,
.resume = htcpen_isa_resume,
#endif
.driver = {
.owner = THIS_MODULE,
.name = "htcpen",
}
};
static const struct dmi_system_id htcshift_dmi_table[] __initconst = {
{
.ident = "Shift",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "High Tech Computer Corp"),
DMI_MATCH(DMI_PRODUCT_NAME, "Shift"),
},
},
{ }
};
MODULE_DEVICE_TABLE(dmi, htcshift_dmi_table);
static int __init htcpen_isa_init(void)
{
if (!dmi_check_system(htcshift_dmi_table))
return -ENODEV;
return isa_register_driver(&htcpen_isa_driver, 1);
}
static void __exit htcpen_isa_exit(void)
{
isa_unregister_driver(&htcpen_isa_driver);
}
module_init(htcpen_isa_init);
module_exit(htcpen_isa_exit);
|
linux-master
|
drivers/input/touchscreen/htcpen.c
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2012 Simon Budig, <[email protected]>
* Daniel Wagener <[email protected]> (M09 firmware support)
* Lothar Waßmann <[email protected]> (DT support)
* Dario Binacchi <[email protected]> (regmap support)
*/
/*
* This is a driver for the EDT "Polytouch" family of touch controllers
* based on the FocalTech FT5x06 line of chips.
*
* Development of this driver has been sponsored by Glyn:
* http://www.glyn.com/Products/Displays
*/
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/ratelimit.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <asm/unaligned.h>
#define WORK_REGISTER_THRESHOLD 0x00
#define WORK_REGISTER_REPORT_RATE 0x08
#define WORK_REGISTER_GAIN 0x30
#define WORK_REGISTER_OFFSET 0x31
#define WORK_REGISTER_NUM_X 0x33
#define WORK_REGISTER_NUM_Y 0x34
#define PMOD_REGISTER_ACTIVE 0x00
#define PMOD_REGISTER_HIBERNATE 0x03
#define M09_REGISTER_THRESHOLD 0x80
#define M09_REGISTER_GAIN 0x92
#define M09_REGISTER_OFFSET 0x93
#define M09_REGISTER_NUM_X 0x94
#define M09_REGISTER_NUM_Y 0x95
#define M12_REGISTER_REPORT_RATE 0x88
#define EV_REGISTER_THRESHOLD 0x40
#define EV_REGISTER_GAIN 0x41
#define EV_REGISTER_OFFSET_Y 0x45
#define EV_REGISTER_OFFSET_X 0x46
#define NO_REGISTER 0xff
#define WORK_REGISTER_OPMODE 0x3c
#define FACTORY_REGISTER_OPMODE 0x01
#define PMOD_REGISTER_OPMODE 0xa5
#define TOUCH_EVENT_DOWN 0x00
#define TOUCH_EVENT_UP 0x01
#define TOUCH_EVENT_ON 0x02
#define TOUCH_EVENT_RESERVED 0x03
#define EDT_NAME_LEN 23
#define EDT_SWITCH_MODE_RETRIES 10
#define EDT_SWITCH_MODE_DELAY 5 /* msec */
#define EDT_RAW_DATA_RETRIES 100
#define EDT_RAW_DATA_DELAY 1000 /* usec */
#define EDT_DEFAULT_NUM_X 1024
#define EDT_DEFAULT_NUM_Y 1024
#define M06_REG_CMD(factory) ((factory) ? 0xf3 : 0xfc)
#define M06_REG_ADDR(factory, addr) ((factory) ? (addr) & 0x7f : (addr) & 0x3f)
enum edt_pmode {
EDT_PMODE_NOT_SUPPORTED,
EDT_PMODE_HIBERNATE,
EDT_PMODE_POWEROFF,
};
enum edt_ver {
EDT_M06,
EDT_M09,
EDT_M12,
EV_FT,
GENERIC_FT,
};
struct edt_reg_addr {
int reg_threshold;
int reg_report_rate;
int reg_gain;
int reg_offset;
int reg_offset_x;
int reg_offset_y;
int reg_num_x;
int reg_num_y;
};
struct edt_ft5x06_ts_data {
struct i2c_client *client;
struct input_dev *input;
struct touchscreen_properties prop;
u16 num_x;
u16 num_y;
struct regulator *vcc;
struct regulator *iovcc;
struct gpio_desc *reset_gpio;
struct gpio_desc *wake_gpio;
struct regmap *regmap;
#if defined(CONFIG_DEBUG_FS)
struct dentry *debug_dir;
u8 *raw_buffer;
size_t raw_bufsize;
#endif
struct mutex mutex;
bool factory_mode;
enum edt_pmode suspend_mode;
int threshold;
int gain;
int offset;
int offset_x;
int offset_y;
int report_rate;
int max_support_points;
int point_len;
u8 tdata_cmd;
int tdata_len;
int tdata_offset;
char name[EDT_NAME_LEN];
char fw_version[EDT_NAME_LEN];
struct edt_reg_addr reg_addr;
enum edt_ver version;
unsigned int crc_errors;
unsigned int header_errors;
};
struct edt_i2c_chip_data {
int max_support_points;
};
static const struct regmap_config edt_ft5x06_i2c_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata,
u8 *buf, int buflen)
{
int i;
u8 crc = 0;
for (i = 0; i < buflen - 1; i++)
crc ^= buf[i];
if (crc != buf[buflen - 1]) {
tsdata->crc_errors++;
dev_err_ratelimited(&tsdata->client->dev,
"crc error: 0x%02x expected, got 0x%02x\n",
crc, buf[buflen - 1]);
return false;
}
return true;
}
static int edt_M06_i2c_read(void *context, const void *reg_buf, size_t reg_size,
void *val_buf, size_t val_size)
{
struct device *dev = context;
struct i2c_client *i2c = to_i2c_client(dev);
struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(i2c);
struct i2c_msg xfer[2];
bool reg_read = false;
u8 addr;
u8 wlen;
u8 wbuf[4], rbuf[3];
int ret;
addr = *((u8 *)reg_buf);
wbuf[0] = addr;
switch (addr) {
case 0xf5:
wlen = 3;
wbuf[0] = 0xf5;
wbuf[1] = 0xe;
wbuf[2] = *((u8 *)val_buf);
break;
case 0xf9:
wlen = 1;
break;
default:
wlen = 2;
reg_read = true;
wbuf[0] = M06_REG_CMD(tsdata->factory_mode);
wbuf[1] = M06_REG_ADDR(tsdata->factory_mode, addr);
wbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
}
xfer[0].addr = i2c->addr;
xfer[0].flags = 0;
xfer[0].len = wlen;
xfer[0].buf = wbuf;
xfer[1].addr = i2c->addr;
xfer[1].flags = I2C_M_RD;
xfer[1].len = reg_read ? 2 : val_size;
xfer[1].buf = reg_read ? rbuf : val_buf;
ret = i2c_transfer(i2c->adapter, xfer, 2);
if (ret != 2) {
if (ret < 0)
return ret;
return -EIO;
}
if (addr == 0xf9) {
u8 *buf = (u8 *)val_buf;
if (buf[0] != 0xaa || buf[1] != 0xaa ||
buf[2] != val_size) {
tsdata->header_errors++;
dev_err_ratelimited(dev,
"Unexpected header: %02x%02x%02x\n",
buf[0], buf[1], buf[2]);
return -EIO;
}
if (!edt_ft5x06_ts_check_crc(tsdata, val_buf, val_size))
return -EIO;
} else if (reg_read) {
wbuf[2] = rbuf[0];
wbuf[3] = rbuf[1];
if (!edt_ft5x06_ts_check_crc(tsdata, wbuf, 4))
return -EIO;
*((u8 *)val_buf) = rbuf[0];
}
return 0;
}
static int edt_M06_i2c_write(void *context, const void *data, size_t count)
{
struct device *dev = context;
struct i2c_client *i2c = to_i2c_client(dev);
struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(i2c);
u8 addr, val;
u8 wbuf[4];
struct i2c_msg xfer;
int ret;
addr = *((u8 *)data);
val = *((u8 *)data + 1);
wbuf[0] = M06_REG_CMD(tsdata->factory_mode);
wbuf[1] = M06_REG_ADDR(tsdata->factory_mode, addr);
wbuf[2] = val;
wbuf[3] = wbuf[0] ^ wbuf[1] ^ wbuf[2];
xfer.addr = i2c->addr;
xfer.flags = 0;
xfer.len = 4;
xfer.buf = wbuf;
ret = i2c_transfer(i2c->adapter, &xfer, 1);
if (ret != 1) {
if (ret < 0)
return ret;
return -EIO;
}
return 0;
}
static const struct regmap_config edt_M06_i2c_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.read = edt_M06_i2c_read,
.write = edt_M06_i2c_write,
};
static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
{
struct edt_ft5x06_ts_data *tsdata = dev_id;
struct device *dev = &tsdata->client->dev;
u8 rdbuf[63];
int i, type, x, y, id;
int error;
memset(rdbuf, 0, sizeof(rdbuf));
error = regmap_bulk_read(tsdata->regmap, tsdata->tdata_cmd, rdbuf,
tsdata->tdata_len);
if (error) {
dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
error);
goto out;
}
for (i = 0; i < tsdata->max_support_points; i++) {
u8 *buf = &rdbuf[i * tsdata->point_len + tsdata->tdata_offset];
type = buf[0] >> 6;
/* ignore Reserved events */
if (type == TOUCH_EVENT_RESERVED)
continue;
/* M06 sometimes sends bogus coordinates in TOUCH_DOWN */
if (tsdata->version == EDT_M06 && type == TOUCH_EVENT_DOWN)
continue;
x = get_unaligned_be16(buf) & 0x0fff;
y = get_unaligned_be16(buf + 2) & 0x0fff;
/* The FT5x26 send the y coordinate first */
if (tsdata->version == EV_FT)
swap(x, y);
id = (buf[2] >> 4) & 0x0f;
input_mt_slot(tsdata->input, id);
if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER,
type != TOUCH_EVENT_UP))
touchscreen_report_pos(tsdata->input, &tsdata->prop,
x, y, true);
}
input_mt_report_pointer_emulation(tsdata->input, true);
input_sync(tsdata->input);
out:
return IRQ_HANDLED;
}
struct edt_ft5x06_attribute {
struct device_attribute dattr;
size_t field_offset;
u8 limit_low;
u8 limit_high;
u8 addr_m06;
u8 addr_m09;
u8 addr_ev;
};
#define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, _addr_ev, \
_limit_low, _limit_high) \
struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \
.dattr = __ATTR(_field, _mode, \
edt_ft5x06_setting_show, \
edt_ft5x06_setting_store), \
.field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \
.addr_m06 = _addr_m06, \
.addr_m09 = _addr_m09, \
.addr_ev = _addr_ev, \
.limit_low = _limit_low, \
.limit_high = _limit_high, \
}
static ssize_t edt_ft5x06_setting_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
struct edt_ft5x06_attribute *attr =
container_of(dattr, struct edt_ft5x06_attribute, dattr);
u8 *field = (u8 *)tsdata + attr->field_offset;
unsigned int val;
size_t count = 0;
int error = 0;
u8 addr;
mutex_lock(&tsdata->mutex);
if (tsdata->factory_mode) {
error = -EIO;
goto out;
}
switch (tsdata->version) {
case EDT_M06:
addr = attr->addr_m06;
break;
case EDT_M09:
case EDT_M12:
case GENERIC_FT:
addr = attr->addr_m09;
break;
case EV_FT:
addr = attr->addr_ev;
break;
default:
error = -ENODEV;
goto out;
}
if (addr != NO_REGISTER) {
error = regmap_read(tsdata->regmap, addr, &val);
if (error) {
dev_err(&tsdata->client->dev,
"Failed to fetch attribute %s, error %d\n",
dattr->attr.name, error);
goto out;
}
} else {
val = *field;
}
if (val != *field) {
dev_warn(&tsdata->client->dev,
"%s: read (%d) and stored value (%d) differ\n",
dattr->attr.name, val, *field);
*field = val;
}
count = scnprintf(buf, PAGE_SIZE, "%d\n", val);
out:
mutex_unlock(&tsdata->mutex);
return error ?: count;
}
static ssize_t edt_ft5x06_setting_store(struct device *dev,
struct device_attribute *dattr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
struct edt_ft5x06_attribute *attr =
container_of(dattr, struct edt_ft5x06_attribute, dattr);
u8 *field = (u8 *)tsdata + attr->field_offset;
unsigned int val;
int error;
u8 addr;
mutex_lock(&tsdata->mutex);
if (tsdata->factory_mode) {
error = -EIO;
goto out;
}
error = kstrtouint(buf, 0, &val);
if (error)
goto out;
if (val < attr->limit_low || val > attr->limit_high) {
error = -ERANGE;
goto out;
}
switch (tsdata->version) {
case EDT_M06:
addr = attr->addr_m06;
break;
case EDT_M09:
case EDT_M12:
case GENERIC_FT:
addr = attr->addr_m09;
break;
case EV_FT:
addr = attr->addr_ev;
break;
default:
error = -ENODEV;
goto out;
}
if (addr != NO_REGISTER) {
error = regmap_write(tsdata->regmap, addr, val);
if (error) {
dev_err(&tsdata->client->dev,
"Failed to update attribute %s, error: %d\n",
dattr->attr.name, error);
goto out;
}
}
*field = val;
out:
mutex_unlock(&tsdata->mutex);
return error ?: count;
}
/* m06, m09: range 0-31, m12: range 0-5 */
static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN,
M09_REGISTER_GAIN, EV_REGISTER_GAIN, 0, 31);
/* m06, m09: range 0-31, m12: range 0-16 */
static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET,
M09_REGISTER_OFFSET, NO_REGISTER, 0, 31);
/* m06, m09, m12: no supported, ev_ft: range 0-80 */
static EDT_ATTR(offset_x, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER,
EV_REGISTER_OFFSET_X, 0, 80);
/* m06, m09, m12: no supported, ev_ft: range 0-80 */
static EDT_ATTR(offset_y, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER,
EV_REGISTER_OFFSET_Y, 0, 80);
/* m06: range 20 to 80, m09: range 0 to 30, m12: range 1 to 255... */
static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD,
M09_REGISTER_THRESHOLD, EV_REGISTER_THRESHOLD, 0, 255);
/* m06: range 3 to 14, m12: range 1 to 255 */
static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE,
M12_REGISTER_REPORT_RATE, NO_REGISTER, 0, 255);
static ssize_t model_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
return sysfs_emit(buf, "%s\n", tsdata->name);
}
static DEVICE_ATTR_RO(model);
static ssize_t fw_version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
return sysfs_emit(buf, "%s\n", tsdata->fw_version);
}
static DEVICE_ATTR_RO(fw_version);
/* m06 only */
static ssize_t header_errors_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
return sysfs_emit(buf, "%d\n", tsdata->header_errors);
}
static DEVICE_ATTR_RO(header_errors);
/* m06 only */
static ssize_t crc_errors_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
return sysfs_emit(buf, "%d\n", tsdata->crc_errors);
}
static DEVICE_ATTR_RO(crc_errors);
static struct attribute *edt_ft5x06_attrs[] = {
&edt_ft5x06_attr_gain.dattr.attr,
&edt_ft5x06_attr_offset.dattr.attr,
&edt_ft5x06_attr_offset_x.dattr.attr,
&edt_ft5x06_attr_offset_y.dattr.attr,
&edt_ft5x06_attr_threshold.dattr.attr,
&edt_ft5x06_attr_report_rate.dattr.attr,
&dev_attr_model.attr,
&dev_attr_fw_version.attr,
&dev_attr_header_errors.attr,
&dev_attr_crc_errors.attr,
NULL
};
static const struct attribute_group edt_ft5x06_attr_group = {
.attrs = edt_ft5x06_attrs,
};
static void edt_ft5x06_restore_reg_parameters(struct edt_ft5x06_ts_data *tsdata)
{
struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
struct regmap *regmap = tsdata->regmap;
regmap_write(regmap, reg_addr->reg_threshold, tsdata->threshold);
regmap_write(regmap, reg_addr->reg_gain, tsdata->gain);
if (reg_addr->reg_offset != NO_REGISTER)
regmap_write(regmap, reg_addr->reg_offset, tsdata->offset);
if (reg_addr->reg_offset_x != NO_REGISTER)
regmap_write(regmap, reg_addr->reg_offset_x, tsdata->offset_x);
if (reg_addr->reg_offset_y != NO_REGISTER)
regmap_write(regmap, reg_addr->reg_offset_y, tsdata->offset_y);
if (reg_addr->reg_report_rate != NO_REGISTER)
regmap_write(regmap, reg_addr->reg_report_rate,
tsdata->report_rate);
}
#ifdef CONFIG_DEBUG_FS
static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
{
struct i2c_client *client = tsdata->client;
int retries = EDT_SWITCH_MODE_RETRIES;
unsigned int val;
int error;
if (tsdata->version != EDT_M06) {
dev_err(&client->dev,
"No factory mode support for non-M06 devices\n");
return -EINVAL;
}
disable_irq(client->irq);
if (!tsdata->raw_buffer) {
tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y *
sizeof(u16);
tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL);
if (!tsdata->raw_buffer) {
error = -ENOMEM;
goto err_out;
}
}
/* mode register is 0x3c when in the work mode */
error = regmap_write(tsdata->regmap, WORK_REGISTER_OPMODE, 0x03);
if (error) {
dev_err(&client->dev,
"failed to switch to factory mode, error %d\n", error);
goto err_out;
}
tsdata->factory_mode = true;
do {
mdelay(EDT_SWITCH_MODE_DELAY);
/* mode register is 0x01 when in factory mode */
error = regmap_read(tsdata->regmap, FACTORY_REGISTER_OPMODE,
&val);
if (!error && val == 0x03)
break;
} while (--retries > 0);
if (retries == 0) {
dev_err(&client->dev, "not in factory mode after %dms.\n",
EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
error = -EIO;
goto err_out;
}
return 0;
err_out:
kfree(tsdata->raw_buffer);
tsdata->raw_buffer = NULL;
tsdata->factory_mode = false;
enable_irq(client->irq);
return error;
}
static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
{
struct i2c_client *client = tsdata->client;
int retries = EDT_SWITCH_MODE_RETRIES;
unsigned int val;
int error;
/* mode register is 0x01 when in the factory mode */
error = regmap_write(tsdata->regmap, FACTORY_REGISTER_OPMODE, 0x1);
if (error) {
dev_err(&client->dev,
"failed to switch to work mode, error: %d\n", error);
return error;
}
tsdata->factory_mode = false;
do {
mdelay(EDT_SWITCH_MODE_DELAY);
/* mode register is 0x01 when in factory mode */
error = regmap_read(tsdata->regmap, WORK_REGISTER_OPMODE, &val);
if (!error && val == 0x01)
break;
} while (--retries > 0);
if (retries == 0) {
dev_err(&client->dev, "not in work mode after %dms.\n",
EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
tsdata->factory_mode = true;
return -EIO;
}
kfree(tsdata->raw_buffer);
tsdata->raw_buffer = NULL;
edt_ft5x06_restore_reg_parameters(tsdata);
enable_irq(client->irq);
return 0;
}
static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode)
{
struct edt_ft5x06_ts_data *tsdata = data;
*mode = tsdata->factory_mode;
return 0;
};
static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode)
{
struct edt_ft5x06_ts_data *tsdata = data;
int retval = 0;
if (mode > 1)
return -ERANGE;
mutex_lock(&tsdata->mutex);
if (mode != tsdata->factory_mode) {
retval = mode ? edt_ft5x06_factory_mode(tsdata) :
edt_ft5x06_work_mode(tsdata);
}
mutex_unlock(&tsdata->mutex);
return retval;
};
DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get,
edt_ft5x06_debugfs_mode_set, "%llu\n");
static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file,
char __user *buf, size_t count,
loff_t *off)
{
struct edt_ft5x06_ts_data *tsdata = file->private_data;
struct i2c_client *client = tsdata->client;
int retries = EDT_RAW_DATA_RETRIES;
unsigned int val;
int i, error;
size_t read = 0;
int colbytes;
u8 *rdbuf;
if (*off < 0 || *off >= tsdata->raw_bufsize)
return 0;
mutex_lock(&tsdata->mutex);
if (!tsdata->factory_mode || !tsdata->raw_buffer) {
error = -EIO;
goto out;
}
error = regmap_write(tsdata->regmap, 0x08, 0x01);
if (error) {
dev_err(&client->dev,
"failed to write 0x08 register, error %d\n", error);
goto out;
}
do {
usleep_range(EDT_RAW_DATA_DELAY, EDT_RAW_DATA_DELAY + 100);
error = regmap_read(tsdata->regmap, 0x08, &val);
if (error) {
dev_err(&client->dev,
"failed to read 0x08 register, error %d\n",
error);
goto out;
}
if (val == 1)
break;
} while (--retries > 0);
if (retries == 0) {
dev_err(&client->dev,
"timed out waiting for register to settle\n");
error = -ETIMEDOUT;
goto out;
}
rdbuf = tsdata->raw_buffer;
colbytes = tsdata->num_y * sizeof(u16);
for (i = 0; i < tsdata->num_x; i++) {
rdbuf[0] = i; /* column index */
error = regmap_bulk_read(tsdata->regmap, 0xf5, rdbuf, colbytes);
if (error)
goto out;
rdbuf += colbytes;
}
read = min_t(size_t, count, tsdata->raw_bufsize - *off);
if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) {
error = -EFAULT;
goto out;
}
*off += read;
out:
mutex_unlock(&tsdata->mutex);
return error ?: read;
};
static const struct file_operations debugfs_raw_data_fops = {
.open = simple_open,
.read = edt_ft5x06_debugfs_raw_data_read,
};
static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
const char *debugfs_name)
{
tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL);
debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x);
debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y);
debugfs_create_file("mode", S_IRUSR | S_IWUSR,
tsdata->debug_dir, tsdata, &debugfs_mode_fops);
debugfs_create_file("raw_data", S_IRUSR,
tsdata->debug_dir, tsdata, &debugfs_raw_data_fops);
}
static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
{
debugfs_remove_recursive(tsdata->debug_dir);
kfree(tsdata->raw_buffer);
}
#else
static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
{
return -ENOSYS;
}
static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
const char *debugfs_name)
{
}
static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
{
}
#endif /* CONFIG_DEBUGFS */
static int edt_ft5x06_ts_identify(struct i2c_client *client,
struct edt_ft5x06_ts_data *tsdata)
{
u8 rdbuf[EDT_NAME_LEN];
char *p;
int error;
char *model_name = tsdata->name;
char *fw_version = tsdata->fw_version;
/* see what we find if we assume it is a M06 *
* if we get less than EDT_NAME_LEN, we don't want
* to have garbage in there
*/
memset(rdbuf, 0, sizeof(rdbuf));
error = regmap_bulk_read(tsdata->regmap, 0xBB, rdbuf, EDT_NAME_LEN - 1);
if (error)
return error;
/* Probe content for something consistent.
* M06 starts with a response byte, M12 gives the data directly.
* M09/Generic does not provide model number information.
*/
if (!strncasecmp(rdbuf + 1, "EP0", 3)) {
tsdata->version = EDT_M06;
/* remove last '$' end marker */
rdbuf[EDT_NAME_LEN - 1] = '\0';
if (rdbuf[EDT_NAME_LEN - 2] == '$')
rdbuf[EDT_NAME_LEN - 2] = '\0';
/* look for Model/Version separator */
p = strchr(rdbuf, '*');
if (p)
*p++ = '\0';
strscpy(model_name, rdbuf + 1, EDT_NAME_LEN);
strscpy(fw_version, p ? p : "", EDT_NAME_LEN);
regmap_exit(tsdata->regmap);
tsdata->regmap = regmap_init_i2c(client,
&edt_M06_i2c_regmap_config);
if (IS_ERR(tsdata->regmap)) {
dev_err(&client->dev, "regmap allocation failed\n");
return PTR_ERR(tsdata->regmap);
}
} else if (!strncasecmp(rdbuf, "EP0", 3)) {
tsdata->version = EDT_M12;
/* remove last '$' end marker */
rdbuf[EDT_NAME_LEN - 2] = '\0';
if (rdbuf[EDT_NAME_LEN - 3] == '$')
rdbuf[EDT_NAME_LEN - 3] = '\0';
/* look for Model/Version separator */
p = strchr(rdbuf, '*');
if (p)
*p++ = '\0';
strscpy(model_name, rdbuf, EDT_NAME_LEN);
strscpy(fw_version, p ? p : "", EDT_NAME_LEN);
} else {
/* If it is not an EDT M06/M12 touchscreen, then the model
* detection is a bit hairy. The different ft5x06
* firmwares around don't reliably implement the
* identification registers. Well, we'll take a shot.
*
* The main difference between generic focaltec based
* touches and EDT M09 is that we know how to retrieve
* the max coordinates for the latter.
*/
tsdata->version = GENERIC_FT;
error = regmap_bulk_read(tsdata->regmap, 0xA6, rdbuf, 2);
if (error)
return error;
strscpy(fw_version, rdbuf, 2);
error = regmap_bulk_read(tsdata->regmap, 0xA8, rdbuf, 1);
if (error)
return error;
/* This "model identification" is not exact. Unfortunately
* not all firmwares for the ft5x06 put useful values in
* the identification registers.
*/
switch (rdbuf[0]) {
case 0x11: /* EDT EP0110M09 */
case 0x35: /* EDT EP0350M09 */
case 0x43: /* EDT EP0430M09 */
case 0x50: /* EDT EP0500M09 */
case 0x57: /* EDT EP0570M09 */
case 0x70: /* EDT EP0700M09 */
tsdata->version = EDT_M09;
snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09",
rdbuf[0] >> 4, rdbuf[0] & 0x0F);
break;
case 0xa1: /* EDT EP1010ML00 */
tsdata->version = EDT_M09;
snprintf(model_name, EDT_NAME_LEN, "EP%i%i0ML00",
rdbuf[0] >> 4, rdbuf[0] & 0x0F);
break;
case 0x5a: /* Solomon Goldentek Display */
snprintf(model_name, EDT_NAME_LEN, "GKTW50SCED1R0");
break;
case 0x59: /* Evervision Display with FT5xx6 TS */
tsdata->version = EV_FT;
error = regmap_bulk_read(tsdata->regmap, 0x53, rdbuf, 1);
if (error)
return error;
strscpy(fw_version, rdbuf, 1);
snprintf(model_name, EDT_NAME_LEN,
"EVERVISION-FT5726NEi");
break;
default:
snprintf(model_name, EDT_NAME_LEN,
"generic ft5x06 (%02x)",
rdbuf[0]);
break;
}
}
return 0;
}
static void edt_ft5x06_ts_get_defaults(struct device *dev,
struct edt_ft5x06_ts_data *tsdata)
{
struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
struct regmap *regmap = tsdata->regmap;
u32 val;
int error;
error = device_property_read_u32(dev, "threshold", &val);
if (!error) {
regmap_write(regmap, reg_addr->reg_threshold, val);
tsdata->threshold = val;
}
error = device_property_read_u32(dev, "gain", &val);
if (!error) {
regmap_write(regmap, reg_addr->reg_gain, val);
tsdata->gain = val;
}
error = device_property_read_u32(dev, "offset", &val);
if (!error) {
if (reg_addr->reg_offset != NO_REGISTER)
regmap_write(regmap, reg_addr->reg_offset, val);
tsdata->offset = val;
}
error = device_property_read_u32(dev, "offset-x", &val);
if (!error) {
if (reg_addr->reg_offset_x != NO_REGISTER)
regmap_write(regmap, reg_addr->reg_offset_x, val);
tsdata->offset_x = val;
}
error = device_property_read_u32(dev, "offset-y", &val);
if (!error) {
if (reg_addr->reg_offset_y != NO_REGISTER)
regmap_write(regmap, reg_addr->reg_offset_y, val);
tsdata->offset_y = val;
}
}
static void edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata)
{
struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
struct regmap *regmap = tsdata->regmap;
unsigned int val;
regmap_read(regmap, reg_addr->reg_threshold, &tsdata->threshold);
regmap_read(regmap, reg_addr->reg_gain, &tsdata->gain);
if (reg_addr->reg_offset != NO_REGISTER)
regmap_read(regmap, reg_addr->reg_offset, &tsdata->offset);
if (reg_addr->reg_offset_x != NO_REGISTER)
regmap_read(regmap, reg_addr->reg_offset_x, &tsdata->offset_x);
if (reg_addr->reg_offset_y != NO_REGISTER)
regmap_read(regmap, reg_addr->reg_offset_y, &tsdata->offset_y);
if (reg_addr->reg_report_rate != NO_REGISTER)
regmap_read(regmap, reg_addr->reg_report_rate,
&tsdata->report_rate);
tsdata->num_x = EDT_DEFAULT_NUM_X;
if (reg_addr->reg_num_x != NO_REGISTER) {
if (!regmap_read(regmap, reg_addr->reg_num_x, &val))
tsdata->num_x = val;
}
tsdata->num_y = EDT_DEFAULT_NUM_Y;
if (reg_addr->reg_num_y != NO_REGISTER) {
if (!regmap_read(regmap, reg_addr->reg_num_y, &val))
tsdata->num_y = val;
}
}
static void edt_ft5x06_ts_set_tdata_parameters(struct edt_ft5x06_ts_data *tsdata)
{
int crclen;
if (tsdata->version == EDT_M06) {
tsdata->tdata_cmd = 0xf9;
tsdata->tdata_offset = 5;
tsdata->point_len = 4;
crclen = 1;
} else {
tsdata->tdata_cmd = 0x0;
tsdata->tdata_offset = 3;
tsdata->point_len = 6;
crclen = 0;
}
tsdata->tdata_len = tsdata->point_len * tsdata->max_support_points +
tsdata->tdata_offset + crclen;
}
static void edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
{
struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
switch (tsdata->version) {
case EDT_M06:
reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD;
reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE;
reg_addr->reg_gain = WORK_REGISTER_GAIN;
reg_addr->reg_offset = WORK_REGISTER_OFFSET;
reg_addr->reg_offset_x = NO_REGISTER;
reg_addr->reg_offset_y = NO_REGISTER;
reg_addr->reg_num_x = WORK_REGISTER_NUM_X;
reg_addr->reg_num_y = WORK_REGISTER_NUM_Y;
break;
case EDT_M09:
case EDT_M12:
reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
reg_addr->reg_report_rate = tsdata->version == EDT_M12 ?
M12_REGISTER_REPORT_RATE : NO_REGISTER;
reg_addr->reg_gain = M09_REGISTER_GAIN;
reg_addr->reg_offset = M09_REGISTER_OFFSET;
reg_addr->reg_offset_x = NO_REGISTER;
reg_addr->reg_offset_y = NO_REGISTER;
reg_addr->reg_num_x = M09_REGISTER_NUM_X;
reg_addr->reg_num_y = M09_REGISTER_NUM_Y;
break;
case EV_FT:
reg_addr->reg_threshold = EV_REGISTER_THRESHOLD;
reg_addr->reg_report_rate = NO_REGISTER;
reg_addr->reg_gain = EV_REGISTER_GAIN;
reg_addr->reg_offset = NO_REGISTER;
reg_addr->reg_offset_x = EV_REGISTER_OFFSET_X;
reg_addr->reg_offset_y = EV_REGISTER_OFFSET_Y;
reg_addr->reg_num_x = NO_REGISTER;
reg_addr->reg_num_y = NO_REGISTER;
break;
case GENERIC_FT:
/* this is a guesswork */
reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
reg_addr->reg_report_rate = NO_REGISTER;
reg_addr->reg_gain = M09_REGISTER_GAIN;
reg_addr->reg_offset = M09_REGISTER_OFFSET;
reg_addr->reg_offset_x = NO_REGISTER;
reg_addr->reg_offset_y = NO_REGISTER;
reg_addr->reg_num_x = NO_REGISTER;
reg_addr->reg_num_y = NO_REGISTER;
break;
}
}
static void edt_ft5x06_disable_regulators(void *arg)
{
struct edt_ft5x06_ts_data *data = arg;
regulator_disable(data->vcc);
regulator_disable(data->iovcc);
}
static int edt_ft5x06_ts_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
const struct edt_i2c_chip_data *chip_data;
struct edt_ft5x06_ts_data *tsdata;
unsigned int val;
struct input_dev *input;
unsigned long irq_flags;
int error;
u32 report_rate;
dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
if (!tsdata) {
dev_err(&client->dev, "failed to allocate driver data.\n");
return -ENOMEM;
}
tsdata->regmap = regmap_init_i2c(client, &edt_ft5x06_i2c_regmap_config);
if (IS_ERR(tsdata->regmap)) {
dev_err(&client->dev, "regmap allocation failed\n");
return PTR_ERR(tsdata->regmap);
}
chip_data = device_get_match_data(&client->dev);
if (!chip_data)
chip_data = (const struct edt_i2c_chip_data *)id->driver_data;
if (!chip_data || !chip_data->max_support_points) {
dev_err(&client->dev, "invalid or missing chip data\n");
return -EINVAL;
}
tsdata->max_support_points = chip_data->max_support_points;
tsdata->vcc = devm_regulator_get(&client->dev, "vcc");
if (IS_ERR(tsdata->vcc))
return dev_err_probe(&client->dev, PTR_ERR(tsdata->vcc),
"failed to request regulator\n");
tsdata->iovcc = devm_regulator_get(&client->dev, "iovcc");
if (IS_ERR(tsdata->iovcc)) {
error = PTR_ERR(tsdata->iovcc);
if (error != -EPROBE_DEFER)
dev_err(&client->dev,
"failed to request iovcc regulator: %d\n", error);
return error;
}
error = regulator_enable(tsdata->iovcc);
if (error < 0) {
dev_err(&client->dev, "failed to enable iovcc: %d\n", error);
return error;
}
/* Delay enabling VCC for > 10us (T_ivd) after IOVCC */
usleep_range(10, 100);
error = regulator_enable(tsdata->vcc);
if (error < 0) {
dev_err(&client->dev, "failed to enable vcc: %d\n", error);
regulator_disable(tsdata->iovcc);
return error;
}
error = devm_add_action_or_reset(&client->dev,
edt_ft5x06_disable_regulators,
tsdata);
if (error)
return error;
tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev,
"reset", GPIOD_OUT_HIGH);
if (IS_ERR(tsdata->reset_gpio)) {
error = PTR_ERR(tsdata->reset_gpio);
dev_err(&client->dev,
"Failed to request GPIO reset pin, error %d\n", error);
return error;
}
tsdata->wake_gpio = devm_gpiod_get_optional(&client->dev,
"wake", GPIOD_OUT_LOW);
if (IS_ERR(tsdata->wake_gpio)) {
error = PTR_ERR(tsdata->wake_gpio);
dev_err(&client->dev,
"Failed to request GPIO wake pin, error %d\n", error);
return error;
}
/*
* Check which sleep modes we can support. Power-off requieres the
* reset-pin to ensure correct power-down/power-up behaviour. Start with
* the EDT_PMODE_POWEROFF test since this is the deepest possible sleep
* mode.
*/
if (tsdata->reset_gpio)
tsdata->suspend_mode = EDT_PMODE_POWEROFF;
else if (tsdata->wake_gpio)
tsdata->suspend_mode = EDT_PMODE_HIBERNATE;
else
tsdata->suspend_mode = EDT_PMODE_NOT_SUPPORTED;
if (tsdata->wake_gpio) {
usleep_range(5000, 6000);
gpiod_set_value_cansleep(tsdata->wake_gpio, 1);
usleep_range(5000, 6000);
}
if (tsdata->reset_gpio) {
usleep_range(5000, 6000);
gpiod_set_value_cansleep(tsdata->reset_gpio, 0);
msleep(300);
}
input = devm_input_allocate_device(&client->dev);
if (!input) {
dev_err(&client->dev, "failed to allocate input device.\n");
return -ENOMEM;
}
mutex_init(&tsdata->mutex);
tsdata->client = client;
tsdata->input = input;
tsdata->factory_mode = false;
i2c_set_clientdata(client, tsdata);
error = edt_ft5x06_ts_identify(client, tsdata);
if (error) {
dev_err(&client->dev, "touchscreen probe failed\n");
return error;
}
/*
* Dummy read access. EP0700MLP1 returns bogus data on the first
* register read access and ignores writes.
*/
regmap_read(tsdata->regmap, 0x00, &val);
edt_ft5x06_ts_set_tdata_parameters(tsdata);
edt_ft5x06_ts_set_regs(tsdata);
edt_ft5x06_ts_get_defaults(&client->dev, tsdata);
edt_ft5x06_ts_get_parameters(tsdata);
if (tsdata->reg_addr.reg_report_rate != NO_REGISTER &&
!device_property_read_u32(&client->dev,
"report-rate-hz", &report_rate)) {
if (tsdata->version == EDT_M06)
tsdata->report_rate = clamp_val(report_rate, 30, 140);
else
tsdata->report_rate = clamp_val(report_rate, 1, 255);
if (report_rate != tsdata->report_rate)
dev_warn(&client->dev,
"report-rate %dHz is unsupported, use %dHz\n",
report_rate, tsdata->report_rate);
if (tsdata->version == EDT_M06)
tsdata->report_rate /= 10;
regmap_write(tsdata->regmap, tsdata->reg_addr.reg_report_rate,
tsdata->report_rate);
}
dev_dbg(&client->dev,
"Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
tsdata->name, tsdata->fw_version, tsdata->num_x, tsdata->num_y);
input->name = tsdata->name;
input->id.bustype = BUS_I2C;
input->dev.parent = &client->dev;
input_set_abs_params(input, ABS_MT_POSITION_X,
0, tsdata->num_x * 64 - 1, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y,
0, tsdata->num_y * 64 - 1, 0, 0);
touchscreen_parse_properties(input, true, &tsdata->prop);
error = input_mt_init_slots(input, tsdata->max_support_points,
INPUT_MT_DIRECT);
if (error) {
dev_err(&client->dev, "Unable to init MT slots.\n");
return error;
}
irq_flags = irq_get_trigger_type(client->irq);
if (irq_flags == IRQF_TRIGGER_NONE)
irq_flags = IRQF_TRIGGER_FALLING;
irq_flags |= IRQF_ONESHOT;
error = devm_request_threaded_irq(&client->dev, client->irq,
NULL, edt_ft5x06_ts_isr, irq_flags,
client->name, tsdata);
if (error) {
dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
return error;
}
error = devm_device_add_group(&client->dev, &edt_ft5x06_attr_group);
if (error)
return error;
error = input_register_device(input);
if (error)
return error;
edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
dev_dbg(&client->dev,
"EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
client->irq,
tsdata->wake_gpio ? desc_to_gpio(tsdata->wake_gpio) : -1,
tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1);
return 0;
}
static void edt_ft5x06_ts_remove(struct i2c_client *client)
{
struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
edt_ft5x06_ts_teardown_debugfs(tsdata);
regmap_exit(tsdata->regmap);
}
static int edt_ft5x06_ts_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
struct gpio_desc *reset_gpio = tsdata->reset_gpio;
int ret;
if (device_may_wakeup(dev))
return 0;
if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED)
return 0;
/* Enter hibernate mode. */
ret = regmap_write(tsdata->regmap, PMOD_REGISTER_OPMODE,
PMOD_REGISTER_HIBERNATE);
if (ret)
dev_warn(dev, "Failed to set hibernate mode\n");
if (tsdata->suspend_mode == EDT_PMODE_HIBERNATE)
return 0;
/*
* Power-off according the datasheet. Cut the power may leaf the irq
* line in an undefined state depending on the host pull resistor
* settings. Disable the irq to avoid adjusting each host till the
* device is back in a full functional state.
*/
disable_irq(tsdata->client->irq);
gpiod_set_value_cansleep(reset_gpio, 1);
usleep_range(1000, 2000);
ret = regulator_disable(tsdata->vcc);
if (ret)
dev_warn(dev, "Failed to disable vcc\n");
ret = regulator_disable(tsdata->iovcc);
if (ret)
dev_warn(dev, "Failed to disable iovcc\n");
return 0;
}
static int edt_ft5x06_ts_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
int ret = 0;
if (device_may_wakeup(dev))
return 0;
if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED)
return 0;
if (tsdata->suspend_mode == EDT_PMODE_POWEROFF) {
struct gpio_desc *reset_gpio = tsdata->reset_gpio;
/*
* We can't check if the regulator is a dummy or a real
* regulator. So we need to specify the 5ms reset time (T_rst)
* here instead of the 100us T_rtp time. We also need to wait
* 300ms in case it was a real supply and the power was cutted
* of. Toggle the reset pin is also a way to exit the hibernate
* mode.
*/
gpiod_set_value_cansleep(reset_gpio, 1);
usleep_range(5000, 6000);
ret = regulator_enable(tsdata->iovcc);
if (ret) {
dev_err(dev, "Failed to enable iovcc\n");
return ret;
}
/* Delay enabling VCC for > 10us (T_ivd) after IOVCC */
usleep_range(10, 100);
ret = regulator_enable(tsdata->vcc);
if (ret) {
dev_err(dev, "Failed to enable vcc\n");
regulator_disable(tsdata->iovcc);
return ret;
}
usleep_range(1000, 2000);
gpiod_set_value_cansleep(reset_gpio, 0);
msleep(300);
edt_ft5x06_restore_reg_parameters(tsdata);
enable_irq(tsdata->client->irq);
if (tsdata->factory_mode)
ret = edt_ft5x06_factory_mode(tsdata);
} else {
struct gpio_desc *wake_gpio = tsdata->wake_gpio;
gpiod_set_value_cansleep(wake_gpio, 0);
usleep_range(5000, 6000);
gpiod_set_value_cansleep(wake_gpio, 1);
}
return ret;
}
static DEFINE_SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops,
edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume);
static const struct edt_i2c_chip_data edt_ft5x06_data = {
.max_support_points = 5,
};
static const struct edt_i2c_chip_data edt_ft5506_data = {
.max_support_points = 10,
};
static const struct edt_i2c_chip_data edt_ft6236_data = {
.max_support_points = 2,
};
static const struct i2c_device_id edt_ft5x06_ts_id[] = {
{ .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data },
{ .name = "edt-ft5506", .driver_data = (long)&edt_ft5506_data },
{ .name = "ev-ft5726", .driver_data = (long)&edt_ft5506_data },
/* Note no edt- prefix for compatibility with the ft6236.c driver */
{ .name = "ft6236", .driver_data = (long)&edt_ft6236_data },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
static const struct of_device_id edt_ft5x06_of_match[] = {
{ .compatible = "edt,edt-ft5206", .data = &edt_ft5x06_data },
{ .compatible = "edt,edt-ft5306", .data = &edt_ft5x06_data },
{ .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data },
{ .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data },
{ .compatible = "evervision,ev-ft5726", .data = &edt_ft5506_data },
/* Note focaltech vendor prefix for compatibility with ft6236.c */
{ .compatible = "focaltech,ft6236", .data = &edt_ft6236_data },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match);
static struct i2c_driver edt_ft5x06_ts_driver = {
.driver = {
.name = "edt_ft5x06",
.of_match_table = edt_ft5x06_of_match,
.pm = pm_sleep_ptr(&edt_ft5x06_ts_pm_ops),
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
.id_table = edt_ft5x06_ts_id,
.probe = edt_ft5x06_ts_probe,
.remove = edt_ft5x06_ts_remove,
};
module_i2c_driver(edt_ft5x06_ts_driver);
MODULE_AUTHOR("Simon Budig <[email protected]>");
MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
MODULE_LICENSE("GPL v2");
|
linux-master
|
drivers/input/touchscreen/edt-ft5x06.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Wacom Penabled Driver for I2C
*
* Copyright (c) 2011 - 2013 Tatsunosuke Tobita, Wacom.
* <[email protected]>
*/
#include <linux/bits.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <asm/unaligned.h>
/* Bitmasks (for data[3]) */
#define WACOM_TIP_SWITCH BIT(0)
#define WACOM_BARREL_SWITCH BIT(1)
#define WACOM_ERASER BIT(2)
#define WACOM_INVERT BIT(3)
#define WACOM_BARREL_SWITCH_2 BIT(4)
#define WACOM_IN_PROXIMITY BIT(5)
/* Registers */
#define WACOM_COMMAND_LSB 0x04
#define WACOM_COMMAND_MSB 0x00
#define WACOM_DATA_LSB 0x05
#define WACOM_DATA_MSB 0x00
/* Report types */
#define REPORT_FEATURE 0x30
/* Requests / operations */
#define OPCODE_GET_REPORT 0x02
#define WACOM_QUERY_REPORT 3
#define WACOM_QUERY_SIZE 19
struct wacom_features {
int x_max;
int y_max;
int pressure_max;
char fw_version;
};
struct wacom_i2c {
struct i2c_client *client;
struct input_dev *input;
u8 data[WACOM_QUERY_SIZE];
bool prox;
int tool;
};
static int wacom_query_device(struct i2c_client *client,
struct wacom_features *features)
{
u8 get_query_data_cmd[] = {
WACOM_COMMAND_LSB,
WACOM_COMMAND_MSB,
REPORT_FEATURE | WACOM_QUERY_REPORT,
OPCODE_GET_REPORT,
WACOM_DATA_LSB,
WACOM_DATA_MSB,
};
u8 data[WACOM_QUERY_SIZE];
int ret;
struct i2c_msg msgs[] = {
/* Request reading of feature ReportID: 3 (Pen Query Data) */
{
.addr = client->addr,
.flags = 0,
.len = sizeof(get_query_data_cmd),
.buf = get_query_data_cmd,
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = sizeof(data),
.buf = data,
},
};
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret < 0)
return ret;
if (ret != ARRAY_SIZE(msgs))
return -EIO;
features->x_max = get_unaligned_le16(&data[3]);
features->y_max = get_unaligned_le16(&data[5]);
features->pressure_max = get_unaligned_le16(&data[11]);
features->fw_version = get_unaligned_le16(&data[13]);
dev_dbg(&client->dev,
"x_max:%d, y_max:%d, pressure:%d, fw:%d\n",
features->x_max, features->y_max,
features->pressure_max, features->fw_version);
return 0;
}
static irqreturn_t wacom_i2c_irq(int irq, void *dev_id)
{
struct wacom_i2c *wac_i2c = dev_id;
struct input_dev *input = wac_i2c->input;
u8 *data = wac_i2c->data;
unsigned int x, y, pressure;
unsigned char tsw, f1, f2, ers;
int error;
error = i2c_master_recv(wac_i2c->client,
wac_i2c->data, sizeof(wac_i2c->data));
if (error < 0)
goto out;
tsw = data[3] & WACOM_TIP_SWITCH;
ers = data[3] & WACOM_ERASER;
f1 = data[3] & WACOM_BARREL_SWITCH;
f2 = data[3] & WACOM_BARREL_SWITCH_2;
x = le16_to_cpup((__le16 *)&data[4]);
y = le16_to_cpup((__le16 *)&data[6]);
pressure = le16_to_cpup((__le16 *)&data[8]);
if (!wac_i2c->prox)
wac_i2c->tool = (data[3] & (WACOM_ERASER | WACOM_INVERT)) ?
BTN_TOOL_RUBBER : BTN_TOOL_PEN;
wac_i2c->prox = data[3] & WACOM_IN_PROXIMITY;
input_report_key(input, BTN_TOUCH, tsw || ers);
input_report_key(input, wac_i2c->tool, wac_i2c->prox);
input_report_key(input, BTN_STYLUS, f1);
input_report_key(input, BTN_STYLUS2, f2);
input_report_abs(input, ABS_X, x);
input_report_abs(input, ABS_Y, y);
input_report_abs(input, ABS_PRESSURE, pressure);
input_sync(input);
out:
return IRQ_HANDLED;
}
static int wacom_i2c_open(struct input_dev *dev)
{
struct wacom_i2c *wac_i2c = input_get_drvdata(dev);
struct i2c_client *client = wac_i2c->client;
enable_irq(client->irq);
return 0;
}
static void wacom_i2c_close(struct input_dev *dev)
{
struct wacom_i2c *wac_i2c = input_get_drvdata(dev);
struct i2c_client *client = wac_i2c->client;
disable_irq(client->irq);
}
static int wacom_i2c_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct wacom_i2c *wac_i2c;
struct input_dev *input;
struct wacom_features features = { 0 };
int error;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(dev, "i2c_check_functionality error\n");
return -EIO;
}
error = wacom_query_device(client, &features);
if (error)
return error;
wac_i2c = devm_kzalloc(dev, sizeof(*wac_i2c), GFP_KERNEL);
if (!wac_i2c)
return -ENOMEM;
wac_i2c->client = client;
input = devm_input_allocate_device(dev);
if (!input)
return -ENOMEM;
wac_i2c->input = input;
input->name = "Wacom I2C Digitizer";
input->id.bustype = BUS_I2C;
input->id.vendor = 0x56a;
input->id.version = features.fw_version;
input->open = wacom_i2c_open;
input->close = wacom_i2c_close;
input->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
__set_bit(BTN_TOOL_PEN, input->keybit);
__set_bit(BTN_TOOL_RUBBER, input->keybit);
__set_bit(BTN_STYLUS, input->keybit);
__set_bit(BTN_STYLUS2, input->keybit);
__set_bit(BTN_TOUCH, input->keybit);
input_set_abs_params(input, ABS_X, 0, features.x_max, 0, 0);
input_set_abs_params(input, ABS_Y, 0, features.y_max, 0, 0);
input_set_abs_params(input, ABS_PRESSURE,
0, features.pressure_max, 0, 0);
input_set_drvdata(input, wac_i2c);
error = devm_request_threaded_irq(dev, client->irq, NULL, wacom_i2c_irq,
IRQF_ONESHOT, "wacom_i2c", wac_i2c);
if (error) {
dev_err(dev, "Failed to request IRQ: %d\n", error);
return error;
}
/* Disable the IRQ, we'll enable it in wac_i2c_open() */
disable_irq(client->irq);
error = input_register_device(wac_i2c->input);
if (error) {
dev_err(dev, "Failed to register input device: %d\n", error);
return error;
}
return 0;
}
static int wacom_i2c_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
disable_irq(client->irq);
return 0;
}
static int wacom_i2c_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
enable_irq(client->irq);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(wacom_i2c_pm, wacom_i2c_suspend, wacom_i2c_resume);
static const struct i2c_device_id wacom_i2c_id[] = {
{ "WAC_I2C_EMR", 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, wacom_i2c_id);
static struct i2c_driver wacom_i2c_driver = {
.driver = {
.name = "wacom_i2c",
.pm = pm_sleep_ptr(&wacom_i2c_pm),
},
.probe = wacom_i2c_probe,
.id_table = wacom_i2c_id,
};
module_i2c_driver(wacom_i2c_driver);
MODULE_AUTHOR("Tatsunosuke Tobita <[email protected]>");
MODULE_DESCRIPTION("WACOM EMR I2C Driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/wacom_i2c.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
*
* h3600 atmel micro companion support, touchscreen subdevice
* Author : Alessandro Gardich <[email protected]>
* Author : Dmitry Artamonow <[email protected]>
* Author : Linus Walleij <[email protected]>
*/
#include <asm/byteorder.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/pm.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/input.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/mfd/ipaq-micro.h>
struct touchscreen_data {
struct input_dev *input;
struct ipaq_micro *micro;
};
static void micro_ts_receive(void *data, int len, unsigned char *msg)
{
struct touchscreen_data *ts = data;
if (len == 4) {
input_report_abs(ts->input, ABS_X,
be16_to_cpup((__be16 *) &msg[2]));
input_report_abs(ts->input, ABS_Y,
be16_to_cpup((__be16 *) &msg[0]));
input_report_key(ts->input, BTN_TOUCH, 1);
input_sync(ts->input);
} else if (len == 0) {
input_report_abs(ts->input, ABS_X, 0);
input_report_abs(ts->input, ABS_Y, 0);
input_report_key(ts->input, BTN_TOUCH, 0);
input_sync(ts->input);
}
}
static void micro_ts_toggle_receive(struct touchscreen_data *ts, bool enable)
{
struct ipaq_micro *micro = ts->micro;
spin_lock_irq(µ->lock);
if (enable) {
micro->ts = micro_ts_receive;
micro->ts_data = ts;
} else {
micro->ts = NULL;
micro->ts_data = NULL;
}
spin_unlock_irq(&ts->micro->lock);
}
static int micro_ts_open(struct input_dev *input)
{
struct touchscreen_data *ts = input_get_drvdata(input);
micro_ts_toggle_receive(ts, true);
return 0;
}
static void micro_ts_close(struct input_dev *input)
{
struct touchscreen_data *ts = input_get_drvdata(input);
micro_ts_toggle_receive(ts, false);
}
static int micro_ts_probe(struct platform_device *pdev)
{
struct ipaq_micro *micro = dev_get_drvdata(pdev->dev.parent);
struct touchscreen_data *ts;
int error;
ts = devm_kzalloc(&pdev->dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
ts->micro = micro;
ts->input = devm_input_allocate_device(&pdev->dev);
if (!ts->input) {
dev_err(&pdev->dev, "failed to allocate input device\n");
return -ENOMEM;
}
ts->input->name = "ipaq micro ts";
ts->input->open = micro_ts_open;
ts->input->close = micro_ts_close;
input_set_drvdata(ts->input, ts);
input_set_capability(ts->input, EV_KEY, BTN_TOUCH);
input_set_capability(ts->input, EV_ABS, ABS_X);
input_set_capability(ts->input, EV_ABS, ABS_Y);
input_set_abs_params(ts->input, ABS_X, 0, 1023, 0, 0);
input_set_abs_params(ts->input, ABS_Y, 0, 1023, 0, 0);
error = input_register_device(ts->input);
if (error) {
dev_err(&pdev->dev, "error registering touch input\n");
return error;
}
platform_set_drvdata(pdev, ts);
dev_info(&pdev->dev, "iPAQ micro touchscreen\n");
return 0;
}
static int micro_ts_suspend(struct device *dev)
{
struct touchscreen_data *ts = dev_get_drvdata(dev);
micro_ts_toggle_receive(ts, false);
return 0;
}
static int micro_ts_resume(struct device *dev)
{
struct touchscreen_data *ts = dev_get_drvdata(dev);
struct input_dev *input = ts->input;
mutex_lock(&input->mutex);
if (input_device_enabled(input))
micro_ts_toggle_receive(ts, true);
mutex_unlock(&input->mutex);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(micro_ts_dev_pm_ops,
micro_ts_suspend, micro_ts_resume);
static struct platform_driver micro_ts_device_driver = {
.driver = {
.name = "ipaq-micro-ts",
.pm = pm_sleep_ptr(µ_ts_dev_pm_ops),
},
.probe = micro_ts_probe,
};
module_platform_driver(micro_ts_device_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("driver for iPAQ Atmel micro touchscreen");
MODULE_ALIAS("platform:ipaq-micro-ts");
|
linux-master
|
drivers/input/touchscreen/ipaq-micro-ts.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Touch Screen driver for EETI's I2C connected touch screen panels
* Copyright (c) 2009,2018 Daniel Mack <[email protected]>
*
* See EETI's software guide for the protocol specification:
* http://home.eeti.com.tw/documentation.html
*
* Based on migor_ts.c
* Copyright (c) 2008 Magnus Damm
* Copyright (c) 2007 Ujjwal Pande <[email protected]>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/input.h>
#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/timer.h>
#include <linux/gpio/consumer.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <asm/unaligned.h>
struct eeti_ts {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *attn_gpio;
struct touchscreen_properties props;
struct mutex mutex;
bool running;
};
#define EETI_TS_BITDEPTH (11)
#define EETI_MAXVAL ((1 << (EETI_TS_BITDEPTH + 1)) - 1)
#define REPORT_BIT_PRESSED BIT(0)
#define REPORT_BIT_AD0 BIT(1)
#define REPORT_BIT_AD1 BIT(2)
#define REPORT_BIT_HAS_PRESSURE BIT(6)
#define REPORT_RES_BITS(v) (((v) >> 1) + EETI_TS_BITDEPTH)
static void eeti_ts_report_event(struct eeti_ts *eeti, u8 *buf)
{
unsigned int res;
u16 x, y;
res = REPORT_RES_BITS(buf[0] & (REPORT_BIT_AD0 | REPORT_BIT_AD1));
x = get_unaligned_be16(&buf[1]);
y = get_unaligned_be16(&buf[3]);
/* fix the range to 11 bits */
x >>= res - EETI_TS_BITDEPTH;
y >>= res - EETI_TS_BITDEPTH;
if (buf[0] & REPORT_BIT_HAS_PRESSURE)
input_report_abs(eeti->input, ABS_PRESSURE, buf[5]);
touchscreen_report_pos(eeti->input, &eeti->props, x, y, false);
input_report_key(eeti->input, BTN_TOUCH, buf[0] & REPORT_BIT_PRESSED);
input_sync(eeti->input);
}
static int eeti_ts_read(struct eeti_ts *eeti)
{
int len, error;
char buf[6];
len = i2c_master_recv(eeti->client, buf, sizeof(buf));
if (len != sizeof(buf)) {
error = len < 0 ? len : -EIO;
dev_err(&eeti->client->dev,
"failed to read touchscreen data: %d\n",
error);
return error;
}
/* Motion packet */
if (buf[0] & 0x80)
eeti_ts_report_event(eeti, buf);
return 0;
}
static irqreturn_t eeti_ts_isr(int irq, void *dev_id)
{
struct eeti_ts *eeti = dev_id;
int error;
mutex_lock(&eeti->mutex);
do {
/*
* If we have attention GPIO, trust it. Otherwise we'll read
* once and exit. We assume that in this case we are using
* level triggered interrupt and it will get raised again
* if/when there is more data.
*/
if (eeti->attn_gpio &&
!gpiod_get_value_cansleep(eeti->attn_gpio)) {
break;
}
error = eeti_ts_read(eeti);
if (error)
break;
} while (eeti->running && eeti->attn_gpio);
mutex_unlock(&eeti->mutex);
return IRQ_HANDLED;
}
static void eeti_ts_start(struct eeti_ts *eeti)
{
mutex_lock(&eeti->mutex);
eeti->running = true;
enable_irq(eeti->client->irq);
/*
* Kick the controller in case we are using edge interrupt and
* we missed our edge while interrupt was disabled. We expect
* the attention GPIO to be wired in this case.
*/
if (eeti->attn_gpio && gpiod_get_value_cansleep(eeti->attn_gpio))
eeti_ts_read(eeti);
mutex_unlock(&eeti->mutex);
}
static void eeti_ts_stop(struct eeti_ts *eeti)
{
/*
* Not locking here, just setting a flag and expect that the
* interrupt thread will notice the flag eventually.
*/
eeti->running = false;
wmb();
disable_irq(eeti->client->irq);
}
static int eeti_ts_open(struct input_dev *dev)
{
struct eeti_ts *eeti = input_get_drvdata(dev);
eeti_ts_start(eeti);
return 0;
}
static void eeti_ts_close(struct input_dev *dev)
{
struct eeti_ts *eeti = input_get_drvdata(dev);
eeti_ts_stop(eeti);
}
static int eeti_ts_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct eeti_ts *eeti;
struct input_dev *input;
int error;
/*
* In contrast to what's described in the datasheet, there seems
* to be no way of probing the presence of that device using I2C
* commands. So we need to blindly believe it is there, and wait
* for interrupts to occur.
*/
eeti = devm_kzalloc(dev, sizeof(*eeti), GFP_KERNEL);
if (!eeti) {
dev_err(dev, "failed to allocate driver data\n");
return -ENOMEM;
}
mutex_init(&eeti->mutex);
input = devm_input_allocate_device(dev);
if (!input) {
dev_err(dev, "Failed to allocate input device.\n");
return -ENOMEM;
}
input_set_capability(input, EV_KEY, BTN_TOUCH);
input_set_abs_params(input, ABS_X, 0, EETI_MAXVAL, 0, 0);
input_set_abs_params(input, ABS_Y, 0, EETI_MAXVAL, 0, 0);
input_set_abs_params(input, ABS_PRESSURE, 0, 0xff, 0, 0);
touchscreen_parse_properties(input, false, &eeti->props);
input->name = client->name;
input->id.bustype = BUS_I2C;
input->open = eeti_ts_open;
input->close = eeti_ts_close;
eeti->client = client;
eeti->input = input;
eeti->attn_gpio = devm_gpiod_get_optional(dev, "attn", GPIOD_IN);
if (IS_ERR(eeti->attn_gpio))
return PTR_ERR(eeti->attn_gpio);
i2c_set_clientdata(client, eeti);
input_set_drvdata(input, eeti);
error = devm_request_threaded_irq(dev, client->irq,
NULL, eeti_ts_isr,
IRQF_ONESHOT,
client->name, eeti);
if (error) {
dev_err(dev, "Unable to request touchscreen IRQ: %d\n",
error);
return error;
}
/*
* Disable the device for now. It will be enabled once the
* input device is opened.
*/
eeti_ts_stop(eeti);
error = input_register_device(input);
if (error)
return error;
return 0;
}
static int eeti_ts_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct eeti_ts *eeti = i2c_get_clientdata(client);
struct input_dev *input_dev = eeti->input;
mutex_lock(&input_dev->mutex);
if (input_device_enabled(input_dev))
eeti_ts_stop(eeti);
mutex_unlock(&input_dev->mutex);
if (device_may_wakeup(&client->dev))
enable_irq_wake(client->irq);
return 0;
}
static int eeti_ts_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct eeti_ts *eeti = i2c_get_clientdata(client);
struct input_dev *input_dev = eeti->input;
if (device_may_wakeup(&client->dev))
disable_irq_wake(client->irq);
mutex_lock(&input_dev->mutex);
if (input_device_enabled(input_dev))
eeti_ts_start(eeti);
mutex_unlock(&input_dev->mutex);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(eeti_ts_pm, eeti_ts_suspend, eeti_ts_resume);
static const struct i2c_device_id eeti_ts_id[] = {
{ "eeti_ts", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, eeti_ts_id);
#ifdef CONFIG_OF
static const struct of_device_id of_eeti_ts_match[] = {
{ .compatible = "eeti,exc3000-i2c", },
{ }
};
#endif
static struct i2c_driver eeti_ts_driver = {
.driver = {
.name = "eeti_ts",
.pm = pm_sleep_ptr(&eeti_ts_pm),
.of_match_table = of_match_ptr(of_eeti_ts_match),
},
.probe = eeti_ts_probe,
.id_table = eeti_ts_id,
};
module_i2c_driver(eeti_ts_driver);
MODULE_DESCRIPTION("EETI Touchscreen driver");
MODULE_AUTHOR("Daniel Mack <[email protected]>");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/eeti_ts.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* iNexio serial touchscreen driver
*
* Copyright (c) 2008 Richard Lemon
* Based on the mtouch driver (c) Vojtech Pavlik and Dan Streetman
*/
/*
* 2008/06/19 Richard Lemon <[email protected]>
* Copied mtouch.c and edited for iNexio protocol
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/serio.h>
#define DRIVER_DESC "iNexio serial touchscreen driver"
MODULE_AUTHOR("Richard Lemon <[email protected]>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
/*
* Definitions & global arrays.
*/
#define INEXIO_FORMAT_TOUCH_BIT 0x01
#define INEXIO_FORMAT_LENGTH 5
#define INEXIO_RESPONSE_BEGIN_BYTE 0x80
/* todo: check specs for max length of all responses */
#define INEXIO_MAX_LENGTH 16
#define INEXIO_MIN_XC 0
#define INEXIO_MAX_XC 0x3fff
#define INEXIO_MIN_YC 0
#define INEXIO_MAX_YC 0x3fff
#define INEXIO_GET_XC(data) (((data[1])<<7) | data[2])
#define INEXIO_GET_YC(data) (((data[3])<<7) | data[4])
#define INEXIO_GET_TOUCHED(data) (INEXIO_FORMAT_TOUCH_BIT & data[0])
/*
* Per-touchscreen data.
*/
struct inexio {
struct input_dev *dev;
struct serio *serio;
int idx;
unsigned char data[INEXIO_MAX_LENGTH];
char phys[32];
};
static void inexio_process_data(struct inexio *pinexio)
{
struct input_dev *dev = pinexio->dev;
if (INEXIO_FORMAT_LENGTH == ++pinexio->idx) {
input_report_abs(dev, ABS_X, INEXIO_GET_XC(pinexio->data));
input_report_abs(dev, ABS_Y, INEXIO_GET_YC(pinexio->data));
input_report_key(dev, BTN_TOUCH, INEXIO_GET_TOUCHED(pinexio->data));
input_sync(dev);
pinexio->idx = 0;
}
}
static irqreturn_t inexio_interrupt(struct serio *serio,
unsigned char data, unsigned int flags)
{
struct inexio *pinexio = serio_get_drvdata(serio);
pinexio->data[pinexio->idx] = data;
if (INEXIO_RESPONSE_BEGIN_BYTE&pinexio->data[0])
inexio_process_data(pinexio);
else
printk(KERN_DEBUG "inexio.c: unknown/unsynchronized data from device, byte %x\n",pinexio->data[0]);
return IRQ_HANDLED;
}
/*
* inexio_disconnect() is the opposite of inexio_connect()
*/
static void inexio_disconnect(struct serio *serio)
{
struct inexio *pinexio = serio_get_drvdata(serio);
input_get_device(pinexio->dev);
input_unregister_device(pinexio->dev);
serio_close(serio);
serio_set_drvdata(serio, NULL);
input_put_device(pinexio->dev);
kfree(pinexio);
}
/*
* inexio_connect() is the routine that is called when someone adds a
* new serio device that supports iNexio protocol and registers it as
* an input device. This is usually accomplished using inputattach.
*/
static int inexio_connect(struct serio *serio, struct serio_driver *drv)
{
struct inexio *pinexio;
struct input_dev *input_dev;
int err;
pinexio = kzalloc(sizeof(struct inexio), GFP_KERNEL);
input_dev = input_allocate_device();
if (!pinexio || !input_dev) {
err = -ENOMEM;
goto fail1;
}
pinexio->serio = serio;
pinexio->dev = input_dev;
snprintf(pinexio->phys, sizeof(pinexio->phys), "%s/input0", serio->phys);
input_dev->name = "iNexio Serial TouchScreen";
input_dev->phys = pinexio->phys;
input_dev->id.bustype = BUS_RS232;
input_dev->id.vendor = SERIO_INEXIO;
input_dev->id.product = 0;
input_dev->id.version = 0x0001;
input_dev->dev.parent = &serio->dev;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_abs_params(pinexio->dev, ABS_X, INEXIO_MIN_XC, INEXIO_MAX_XC, 0, 0);
input_set_abs_params(pinexio->dev, ABS_Y, INEXIO_MIN_YC, INEXIO_MAX_YC, 0, 0);
serio_set_drvdata(serio, pinexio);
err = serio_open(serio, drv);
if (err)
goto fail2;
err = input_register_device(pinexio->dev);
if (err)
goto fail3;
return 0;
fail3: serio_close(serio);
fail2: serio_set_drvdata(serio, NULL);
fail1: input_free_device(input_dev);
kfree(pinexio);
return err;
}
/*
* The serio driver structure.
*/
static const struct serio_device_id inexio_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_INEXIO,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, inexio_serio_ids);
static struct serio_driver inexio_drv = {
.driver = {
.name = "inexio",
},
.description = DRIVER_DESC,
.id_table = inexio_serio_ids,
.interrupt = inexio_interrupt,
.connect = inexio_connect,
.disconnect = inexio_disconnect,
};
module_serio_driver(inexio_drv);
|
linux-master
|
drivers/input/touchscreen/inexio.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* TSC2004 touchscreen driver
*
* Copyright (C) 2015 QWERTY Embedded Design
* Copyright (C) 2015 EMAC Inc.
*/
#include <linux/module.h>
#include <linux/input.h>
#include <linux/of.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include "tsc200x-core.h"
static const struct input_id tsc2004_input_id = {
.bustype = BUS_I2C,
.product = 2004,
};
static int tsc2004_cmd(struct device *dev, u8 cmd)
{
u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
s32 data;
struct i2c_client *i2c = to_i2c_client(dev);
data = i2c_smbus_write_byte(i2c, tx);
if (data < 0) {
dev_err(dev, "%s: failed, command: %x i2c error: %d\n",
__func__, cmd, data);
return data;
}
return 0;
}
static int tsc2004_probe(struct i2c_client *i2c)
{
return tsc200x_probe(&i2c->dev, i2c->irq, &tsc2004_input_id,
devm_regmap_init_i2c(i2c, &tsc200x_regmap_config),
tsc2004_cmd);
}
static void tsc2004_remove(struct i2c_client *i2c)
{
tsc200x_remove(&i2c->dev);
}
static const struct i2c_device_id tsc2004_idtable[] = {
{ "tsc2004", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tsc2004_idtable);
#ifdef CONFIG_OF
static const struct of_device_id tsc2004_of_match[] = {
{ .compatible = "ti,tsc2004" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, tsc2004_of_match);
#endif
static struct i2c_driver tsc2004_driver = {
.driver = {
.name = "tsc2004",
.of_match_table = of_match_ptr(tsc2004_of_match),
.pm = pm_sleep_ptr(&tsc200x_pm_ops),
},
.id_table = tsc2004_idtable,
.probe = tsc2004_probe,
.remove = tsc2004_remove,
};
module_i2c_driver(tsc2004_driver);
MODULE_AUTHOR("Michael Welling <[email protected]>");
MODULE_DESCRIPTION("TSC2004 Touchscreen Driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/tsc2004.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* AD7879-1/AD7889-1 touchscreen (I2C bus)
*
* Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc.
*/
#include <linux/input.h> /* BUS_I2C */
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/of.h>
#include <linux/pm.h>
#include <linux/regmap.h>
#include "ad7879.h"
#define AD7879_DEVID 0x79 /* AD7879-1/AD7889-1 */
static const struct regmap_config ad7879_i2c_regmap_config = {
.reg_bits = 8,
.val_bits = 16,
.max_register = 15,
};
static int ad7879_i2c_probe(struct i2c_client *client)
{
struct regmap *regmap;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_WORD_DATA)) {
dev_err(&client->dev, "SMBUS Word Data not Supported\n");
return -EIO;
}
regmap = devm_regmap_init_i2c(client, &ad7879_i2c_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
return ad7879_probe(&client->dev, regmap, client->irq,
BUS_I2C, AD7879_DEVID);
}
static const struct i2c_device_id ad7879_id[] = {
{ "ad7879", 0 },
{ "ad7889", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ad7879_id);
#ifdef CONFIG_OF
static const struct of_device_id ad7879_i2c_dt_ids[] = {
{ .compatible = "adi,ad7879-1", },
{ }
};
MODULE_DEVICE_TABLE(of, ad7879_i2c_dt_ids);
#endif
static struct i2c_driver ad7879_i2c_driver = {
.driver = {
.name = "ad7879",
.pm = &ad7879_pm_ops,
.of_match_table = of_match_ptr(ad7879_i2c_dt_ids),
},
.probe = ad7879_i2c_probe,
.id_table = ad7879_id,
};
module_i2c_driver(ad7879_i2c_driver);
MODULE_AUTHOR("Michael Hennerich <[email protected]>");
MODULE_DESCRIPTION("AD7879(-1) touchscreen I2C bus driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/ad7879-i2c.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Touchwindow serial touchscreen driver
*
* Copyright (c) 2006 Rick Koch <[email protected]>
*
* Based on MicroTouch driver (drivers/input/touchscreen/mtouch.c)
* Copyright (c) 2004 Vojtech Pavlik
* and Dan Streetman <[email protected]>
*/
/*
* 2005/02/19 Rick Koch:
* The Touchwindow I used is made by Edmark Corp. and
* constantly outputs a stream of 0's unless it is touched.
* It then outputs 3 bytes: X, Y, and a copy of Y.
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/serio.h>
#define DRIVER_DESC "Touchwindow serial touchscreen driver"
MODULE_AUTHOR("Rick Koch <[email protected]>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
/*
* Definitions & global arrays.
*/
#define TW_LENGTH 3
#define TW_MIN_XC 0
#define TW_MAX_XC 0xff
#define TW_MIN_YC 0
#define TW_MAX_YC 0xff
/*
* Per-touchscreen data.
*/
struct tw {
struct input_dev *dev;
struct serio *serio;
int idx;
int touched;
unsigned char data[TW_LENGTH];
char phys[32];
};
static irqreturn_t tw_interrupt(struct serio *serio,
unsigned char data, unsigned int flags)
{
struct tw *tw = serio_get_drvdata(serio);
struct input_dev *dev = tw->dev;
if (data) { /* touch */
tw->touched = 1;
tw->data[tw->idx++] = data;
/* verify length and that the two Y's are the same */
if (tw->idx == TW_LENGTH && tw->data[1] == tw->data[2]) {
input_report_abs(dev, ABS_X, tw->data[0]);
input_report_abs(dev, ABS_Y, tw->data[1]);
input_report_key(dev, BTN_TOUCH, 1);
input_sync(dev);
tw->idx = 0;
}
} else if (tw->touched) { /* untouch */
input_report_key(dev, BTN_TOUCH, 0);
input_sync(dev);
tw->idx = 0;
tw->touched = 0;
}
return IRQ_HANDLED;
}
/*
* tw_disconnect() is the opposite of tw_connect()
*/
static void tw_disconnect(struct serio *serio)
{
struct tw *tw = serio_get_drvdata(serio);
input_get_device(tw->dev);
input_unregister_device(tw->dev);
serio_close(serio);
serio_set_drvdata(serio, NULL);
input_put_device(tw->dev);
kfree(tw);
}
/*
* tw_connect() is the routine that is called when someone adds a
* new serio device that supports the Touchwin protocol and registers it as
* an input device.
*/
static int tw_connect(struct serio *serio, struct serio_driver *drv)
{
struct tw *tw;
struct input_dev *input_dev;
int err;
tw = kzalloc(sizeof(struct tw), GFP_KERNEL);
input_dev = input_allocate_device();
if (!tw || !input_dev) {
err = -ENOMEM;
goto fail1;
}
tw->serio = serio;
tw->dev = input_dev;
snprintf(tw->phys, sizeof(tw->phys), "%s/input0", serio->phys);
input_dev->name = "Touchwindow Serial TouchScreen";
input_dev->phys = tw->phys;
input_dev->id.bustype = BUS_RS232;
input_dev->id.vendor = SERIO_TOUCHWIN;
input_dev->id.product = 0;
input_dev->id.version = 0x0100;
input_dev->dev.parent = &serio->dev;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_abs_params(tw->dev, ABS_X, TW_MIN_XC, TW_MAX_XC, 0, 0);
input_set_abs_params(tw->dev, ABS_Y, TW_MIN_YC, TW_MAX_YC, 0, 0);
serio_set_drvdata(serio, tw);
err = serio_open(serio, drv);
if (err)
goto fail2;
err = input_register_device(tw->dev);
if (err)
goto fail3;
return 0;
fail3: serio_close(serio);
fail2: serio_set_drvdata(serio, NULL);
fail1: input_free_device(input_dev);
kfree(tw);
return err;
}
/*
* The serio driver structure.
*/
static const struct serio_device_id tw_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_TOUCHWIN,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, tw_serio_ids);
static struct serio_driver tw_drv = {
.driver = {
.name = "touchwin",
},
.description = DRIVER_DESC,
.id_table = tw_serio_ids,
.interrupt = tw_interrupt,
.connect = tw_connect,
.disconnect = tw_disconnect,
};
module_serio_driver(tw_drv);
|
linux-master
|
drivers/input/touchscreen/touchwin.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for Goodix Touchscreens
*
* Copyright (c) 2014 Red Hat Inc.
* Copyright (c) 2015 K. Merker <[email protected]>
*
* This code is based on gt9xx.c authored by [email protected]:
*
* 2010 - 2012 Goodix Technology.
*/
#include <linux/kernel.h>
#include <linux/dmi.h>
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/platform_data/x86/soc.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#include <linux/of.h>
#include <asm/unaligned.h>
#include "goodix.h"
#define GOODIX_GPIO_INT_NAME "irq"
#define GOODIX_GPIO_RST_NAME "reset"
#define GOODIX_MAX_HEIGHT 4096
#define GOODIX_MAX_WIDTH 4096
#define GOODIX_INT_TRIGGER 1
#define GOODIX_CONTACT_SIZE 8
#define GOODIX_MAX_CONTACT_SIZE 9
#define GOODIX_MAX_CONTACTS 10
#define GOODIX_CONFIG_MIN_LENGTH 186
#define GOODIX_CONFIG_911_LENGTH 186
#define GOODIX_CONFIG_967_LENGTH 228
#define GOODIX_CONFIG_GT9X_LENGTH 240
#define GOODIX_BUFFER_STATUS_READY BIT(7)
#define GOODIX_HAVE_KEY BIT(4)
#define GOODIX_BUFFER_STATUS_TIMEOUT 20
#define RESOLUTION_LOC 1
#define MAX_CONTACTS_LOC 5
#define TRIGGER_LOC 6
/* Our special handling for GPIO accesses through ACPI is x86 specific */
#if defined CONFIG_X86 && defined CONFIG_ACPI
#define ACPI_GPIO_SUPPORT
#endif
struct goodix_chip_id {
const char *id;
const struct goodix_chip_data *data;
};
static int goodix_check_cfg_8(struct goodix_ts_data *ts,
const u8 *cfg, int len);
static int goodix_check_cfg_16(struct goodix_ts_data *ts,
const u8 *cfg, int len);
static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts);
static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts);
static const struct goodix_chip_data gt1x_chip_data = {
.config_addr = GOODIX_GT1X_REG_CONFIG_DATA,
.config_len = GOODIX_CONFIG_GT9X_LENGTH,
.check_config = goodix_check_cfg_16,
.calc_config_checksum = goodix_calc_cfg_checksum_16,
};
static const struct goodix_chip_data gt911_chip_data = {
.config_addr = GOODIX_GT9X_REG_CONFIG_DATA,
.config_len = GOODIX_CONFIG_911_LENGTH,
.check_config = goodix_check_cfg_8,
.calc_config_checksum = goodix_calc_cfg_checksum_8,
};
static const struct goodix_chip_data gt967_chip_data = {
.config_addr = GOODIX_GT9X_REG_CONFIG_DATA,
.config_len = GOODIX_CONFIG_967_LENGTH,
.check_config = goodix_check_cfg_8,
.calc_config_checksum = goodix_calc_cfg_checksum_8,
};
static const struct goodix_chip_data gt9x_chip_data = {
.config_addr = GOODIX_GT9X_REG_CONFIG_DATA,
.config_len = GOODIX_CONFIG_GT9X_LENGTH,
.check_config = goodix_check_cfg_8,
.calc_config_checksum = goodix_calc_cfg_checksum_8,
};
static const struct goodix_chip_id goodix_chip_ids[] = {
{ .id = "1151", .data = >1x_chip_data },
{ .id = "1158", .data = >1x_chip_data },
{ .id = "5663", .data = >1x_chip_data },
{ .id = "5688", .data = >1x_chip_data },
{ .id = "917S", .data = >1x_chip_data },
{ .id = "9286", .data = >1x_chip_data },
{ .id = "911", .data = >911_chip_data },
{ .id = "9271", .data = >911_chip_data },
{ .id = "9110", .data = >911_chip_data },
{ .id = "9111", .data = >911_chip_data },
{ .id = "927", .data = >911_chip_data },
{ .id = "928", .data = >911_chip_data },
{ .id = "912", .data = >967_chip_data },
{ .id = "9147", .data = >967_chip_data },
{ .id = "967", .data = >967_chip_data },
{ }
};
static const unsigned long goodix_irq_flags[] = {
IRQ_TYPE_EDGE_RISING,
IRQ_TYPE_EDGE_FALLING,
IRQ_TYPE_LEVEL_LOW,
IRQ_TYPE_LEVEL_HIGH,
};
static const struct dmi_system_id nine_bytes_report[] = {
#if defined(CONFIG_DMI) && defined(CONFIG_X86)
{
/* Lenovo Yoga Book X90F / X90L */
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"),
DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"),
}
},
{
/* Lenovo Yoga Book X91F / X91L */
.matches = {
/* Non exact match to match F + L versions */
DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X91"),
}
},
#endif
{}
};
/*
* Those tablets have their x coordinate inverted
*/
static const struct dmi_system_id inverted_x_screen[] = {
#if defined(CONFIG_DMI) && defined(CONFIG_X86)
{
.ident = "Cube I15-TC",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Cube"),
DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC")
},
},
#endif
{}
};
/**
* goodix_i2c_read - read data from a register of the i2c slave device.
*
* @client: i2c device.
* @reg: the register to read from.
* @buf: raw write data buffer.
* @len: length of the buffer to write
*/
int goodix_i2c_read(struct i2c_client *client, u16 reg, u8 *buf, int len)
{
struct i2c_msg msgs[2];
__be16 wbuf = cpu_to_be16(reg);
int ret;
msgs[0].flags = 0;
msgs[0].addr = client->addr;
msgs[0].len = 2;
msgs[0].buf = (u8 *)&wbuf;
msgs[1].flags = I2C_M_RD;
msgs[1].addr = client->addr;
msgs[1].len = len;
msgs[1].buf = buf;
ret = i2c_transfer(client->adapter, msgs, 2);
if (ret >= 0)
ret = (ret == ARRAY_SIZE(msgs) ? 0 : -EIO);
if (ret)
dev_err(&client->dev, "Error reading %d bytes from 0x%04x: %d\n",
len, reg, ret);
return ret;
}
/**
* goodix_i2c_write - write data to a register of the i2c slave device.
*
* @client: i2c device.
* @reg: the register to write to.
* @buf: raw data buffer to write.
* @len: length of the buffer to write
*/
int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, int len)
{
u8 *addr_buf;
struct i2c_msg msg;
int ret;
addr_buf = kmalloc(len + 2, GFP_KERNEL);
if (!addr_buf)
return -ENOMEM;
addr_buf[0] = reg >> 8;
addr_buf[1] = reg & 0xFF;
memcpy(&addr_buf[2], buf, len);
msg.flags = 0;
msg.addr = client->addr;
msg.buf = addr_buf;
msg.len = len + 2;
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret >= 0)
ret = (ret == 1 ? 0 : -EIO);
kfree(addr_buf);
if (ret)
dev_err(&client->dev, "Error writing %d bytes to 0x%04x: %d\n",
len, reg, ret);
return ret;
}
int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value)
{
return goodix_i2c_write(client, reg, &value, sizeof(value));
}
static const struct goodix_chip_data *goodix_get_chip_data(const char *id)
{
unsigned int i;
for (i = 0; goodix_chip_ids[i].id; i++) {
if (!strcmp(goodix_chip_ids[i].id, id))
return goodix_chip_ids[i].data;
}
return >9x_chip_data;
}
static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
{
unsigned long max_timeout;
int touch_num;
int error;
u16 addr = GOODIX_READ_COOR_ADDR;
/*
* We are going to read 1-byte header,
* ts->contact_size * max(1, touch_num) bytes of coordinates
* and 1-byte footer which contains the touch-key code.
*/
const int header_contact_keycode_size = 1 + ts->contact_size + 1;
/*
* The 'buffer status' bit, which indicates that the data is valid, is
* not set as soon as the interrupt is raised, but slightly after.
* This takes around 10 ms to happen, so we poll for 20 ms.
*/
max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT);
do {
error = goodix_i2c_read(ts->client, addr, data,
header_contact_keycode_size);
if (error)
return error;
if (data[0] & GOODIX_BUFFER_STATUS_READY) {
touch_num = data[0] & 0x0f;
if (touch_num > ts->max_touch_num)
return -EPROTO;
if (touch_num > 1) {
addr += header_contact_keycode_size;
data += header_contact_keycode_size;
error = goodix_i2c_read(ts->client,
addr, data,
ts->contact_size *
(touch_num - 1));
if (error)
return error;
}
return touch_num;
}
if (data[0] == 0 && ts->firmware_name) {
if (goodix_handle_fw_request(ts))
return 0;
}
usleep_range(1000, 2000); /* Poll every 1 - 2 ms */
} while (time_before(jiffies, max_timeout));
/*
* The Goodix panel will send spurious interrupts after a
* 'finger up' event, which will always cause a timeout.
*/
return -ENOMSG;
}
static int goodix_create_pen_input(struct goodix_ts_data *ts)
{
struct device *dev = &ts->client->dev;
struct input_dev *input;
input = devm_input_allocate_device(dev);
if (!input)
return -ENOMEM;
input_copy_abs(input, ABS_X, ts->input_dev, ABS_MT_POSITION_X);
input_copy_abs(input, ABS_Y, ts->input_dev, ABS_MT_POSITION_Y);
/*
* The resolution of these touchscreens is about 10 units/mm, the actual
* resolution does not matter much since we set INPUT_PROP_DIRECT.
* Userspace wants something here though, so just set it to 10 units/mm.
*/
input_abs_set_res(input, ABS_X, 10);
input_abs_set_res(input, ABS_Y, 10);
input_set_abs_params(input, ABS_PRESSURE, 0, 255, 0, 0);
input_set_capability(input, EV_KEY, BTN_TOUCH);
input_set_capability(input, EV_KEY, BTN_TOOL_PEN);
input_set_capability(input, EV_KEY, BTN_STYLUS);
input_set_capability(input, EV_KEY, BTN_STYLUS2);
__set_bit(INPUT_PROP_DIRECT, input->propbit);
input->name = "Goodix Active Pen";
input->phys = "input/pen";
input->id.bustype = BUS_I2C;
input->id.vendor = 0x0416;
if (kstrtou16(ts->id, 10, &input->id.product))
input->id.product = 0x1001;
input->id.version = ts->version;
ts->input_pen = input;
return 0;
}
static void goodix_ts_report_pen_down(struct goodix_ts_data *ts, u8 *data)
{
int input_x, input_y, input_w, error;
u8 key_value;
if (!ts->pen_input_registered) {
error = input_register_device(ts->input_pen);
ts->pen_input_registered = (error == 0) ? 1 : error;
}
if (ts->pen_input_registered < 0)
return;
if (ts->contact_size == 9) {
input_x = get_unaligned_le16(&data[4]);
input_y = get_unaligned_le16(&data[6]);
input_w = get_unaligned_le16(&data[8]);
} else {
input_x = get_unaligned_le16(&data[2]);
input_y = get_unaligned_le16(&data[4]);
input_w = get_unaligned_le16(&data[6]);
}
touchscreen_report_pos(ts->input_pen, &ts->prop, input_x, input_y, false);
input_report_abs(ts->input_pen, ABS_PRESSURE, input_w);
input_report_key(ts->input_pen, BTN_TOUCH, 1);
input_report_key(ts->input_pen, BTN_TOOL_PEN, 1);
if (data[0] & GOODIX_HAVE_KEY) {
key_value = data[1 + ts->contact_size];
input_report_key(ts->input_pen, BTN_STYLUS, key_value & 0x10);
input_report_key(ts->input_pen, BTN_STYLUS2, key_value & 0x20);
} else {
input_report_key(ts->input_pen, BTN_STYLUS, 0);
input_report_key(ts->input_pen, BTN_STYLUS2, 0);
}
input_sync(ts->input_pen);
}
static void goodix_ts_report_pen_up(struct goodix_ts_data *ts)
{
if (!ts->input_pen)
return;
input_report_key(ts->input_pen, BTN_TOUCH, 0);
input_report_key(ts->input_pen, BTN_TOOL_PEN, 0);
input_report_key(ts->input_pen, BTN_STYLUS, 0);
input_report_key(ts->input_pen, BTN_STYLUS2, 0);
input_sync(ts->input_pen);
}
static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data)
{
int id = coor_data[0] & 0x0F;
int input_x = get_unaligned_le16(&coor_data[1]);
int input_y = get_unaligned_le16(&coor_data[3]);
int input_w = get_unaligned_le16(&coor_data[5]);
input_mt_slot(ts->input_dev, id);
input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
touchscreen_report_pos(ts->input_dev, &ts->prop,
input_x, input_y, true);
input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w);
input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w);
}
static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data)
{
int id = coor_data[1] & 0x0F;
int input_x = get_unaligned_le16(&coor_data[3]);
int input_y = get_unaligned_le16(&coor_data[5]);
int input_w = get_unaligned_le16(&coor_data[7]);
input_mt_slot(ts->input_dev, id);
input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
touchscreen_report_pos(ts->input_dev, &ts->prop,
input_x, input_y, true);
input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w);
input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w);
}
static void goodix_ts_release_keys(struct goodix_ts_data *ts)
{
int i;
for (i = 0; i < GOODIX_MAX_KEYS; i++)
input_report_key(ts->input_dev, ts->keymap[i], 0);
}
static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data)
{
int touch_num;
u8 key_value;
int i;
if (data[0] & GOODIX_HAVE_KEY) {
touch_num = data[0] & 0x0f;
key_value = data[1 + ts->contact_size * touch_num];
for (i = 0; i < GOODIX_MAX_KEYS; i++)
if (key_value & BIT(i))
input_report_key(ts->input_dev,
ts->keymap[i], 1);
} else {
goodix_ts_release_keys(ts);
}
}
/**
* goodix_process_events - Process incoming events
*
* @ts: our goodix_ts_data pointer
*
* Called when the IRQ is triggered. Read the current device state, and push
* the input events to the user space.
*/
static void goodix_process_events(struct goodix_ts_data *ts)
{
u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
int touch_num;
int i;
touch_num = goodix_ts_read_input_report(ts, point_data);
if (touch_num < 0)
return;
/* The pen being down is always reported as a single touch */
if (touch_num == 1 && (point_data[1] & 0x80)) {
goodix_ts_report_pen_down(ts, point_data);
goodix_ts_release_keys(ts);
goto sync; /* Release any previously registered touches */
} else {
goodix_ts_report_pen_up(ts);
}
goodix_ts_report_key(ts, point_data);
for (i = 0; i < touch_num; i++)
if (ts->contact_size == 9)
goodix_ts_report_touch_9b(ts,
&point_data[1 + ts->contact_size * i]);
else
goodix_ts_report_touch_8b(ts,
&point_data[1 + ts->contact_size * i]);
sync:
input_mt_sync_frame(ts->input_dev);
input_sync(ts->input_dev);
}
/**
* goodix_ts_irq_handler - The IRQ handler
*
* @irq: interrupt number.
* @dev_id: private data pointer.
*/
static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id)
{
struct goodix_ts_data *ts = dev_id;
goodix_process_events(ts);
goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0);
return IRQ_HANDLED;
}
static void goodix_free_irq(struct goodix_ts_data *ts)
{
devm_free_irq(&ts->client->dev, ts->client->irq, ts);
}
static int goodix_request_irq(struct goodix_ts_data *ts)
{
return devm_request_threaded_irq(&ts->client->dev, ts->client->irq,
NULL, goodix_ts_irq_handler,
ts->irq_flags, ts->client->name, ts);
}
static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len)
{
int i, raw_cfg_len = len - 2;
u8 check_sum = 0;
for (i = 0; i < raw_cfg_len; i++)
check_sum += cfg[i];
check_sum = (~check_sum) + 1;
if (check_sum != cfg[raw_cfg_len]) {
dev_err(&ts->client->dev,
"The checksum of the config fw is not correct");
return -EINVAL;
}
if (cfg[raw_cfg_len + 1] != 1) {
dev_err(&ts->client->dev,
"Config fw must have Config_Fresh register set");
return -EINVAL;
}
return 0;
}
static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts)
{
int i, raw_cfg_len = ts->chip->config_len - 2;
u8 check_sum = 0;
for (i = 0; i < raw_cfg_len; i++)
check_sum += ts->config[i];
check_sum = (~check_sum) + 1;
ts->config[raw_cfg_len] = check_sum;
ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */
}
static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg,
int len)
{
int i, raw_cfg_len = len - 3;
u16 check_sum = 0;
for (i = 0; i < raw_cfg_len; i += 2)
check_sum += get_unaligned_be16(&cfg[i]);
check_sum = (~check_sum) + 1;
if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) {
dev_err(&ts->client->dev,
"The checksum of the config fw is not correct");
return -EINVAL;
}
if (cfg[raw_cfg_len + 2] != 1) {
dev_err(&ts->client->dev,
"Config fw must have Config_Fresh register set");
return -EINVAL;
}
return 0;
}
static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts)
{
int i, raw_cfg_len = ts->chip->config_len - 3;
u16 check_sum = 0;
for (i = 0; i < raw_cfg_len; i += 2)
check_sum += get_unaligned_be16(&ts->config[i]);
check_sum = (~check_sum) + 1;
put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]);
ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */
}
/**
* goodix_check_cfg - Checks if config fw is valid
*
* @ts: goodix_ts_data pointer
* @cfg: firmware config data
* @len: config data length
*/
static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len)
{
if (len < GOODIX_CONFIG_MIN_LENGTH ||
len > GOODIX_CONFIG_MAX_LENGTH) {
dev_err(&ts->client->dev,
"The length of the config fw is not correct");
return -EINVAL;
}
return ts->chip->check_config(ts, cfg, len);
}
/**
* goodix_send_cfg - Write fw config to device
*
* @ts: goodix_ts_data pointer
* @cfg: config firmware to write to device
* @len: config data length
*/
int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len)
{
int error;
error = goodix_check_cfg(ts, cfg, len);
if (error)
return error;
error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len);
if (error)
return error;
dev_dbg(&ts->client->dev, "Config sent successfully.");
/* Let the firmware reconfigure itself, so sleep for 10ms */
usleep_range(10000, 11000);
return 0;
}
#ifdef ACPI_GPIO_SUPPORT
static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts)
{
acpi_handle handle = ACPI_HANDLE(&ts->client->dev);
acpi_status status;
status = acpi_evaluate_object(handle, "INTI", NULL, NULL);
return ACPI_SUCCESS(status) ? 0 : -EIO;
}
static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value)
{
acpi_handle handle = ACPI_HANDLE(&ts->client->dev);
acpi_status status;
status = acpi_execute_simple_method(handle, "INTO", value);
return ACPI_SUCCESS(status) ? 0 : -EIO;
}
#else
static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts)
{
dev_err(&ts->client->dev,
"%s called on device without ACPI support\n", __func__);
return -EINVAL;
}
static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value)
{
dev_err(&ts->client->dev,
"%s called on device without ACPI support\n", __func__);
return -EINVAL;
}
#endif
static int goodix_irq_direction_output(struct goodix_ts_data *ts, int value)
{
switch (ts->irq_pin_access_method) {
case IRQ_PIN_ACCESS_NONE:
dev_err(&ts->client->dev,
"%s called without an irq_pin_access_method set\n",
__func__);
return -EINVAL;
case IRQ_PIN_ACCESS_GPIO:
return gpiod_direction_output(ts->gpiod_int, value);
case IRQ_PIN_ACCESS_ACPI_GPIO:
/*
* The IRQ pin triggers on a falling edge, so its gets marked
* as active-low, use output_raw to avoid the value inversion.
*/
return gpiod_direction_output_raw(ts->gpiod_int, value);
case IRQ_PIN_ACCESS_ACPI_METHOD:
return goodix_pin_acpi_output_method(ts, value);
}
return -EINVAL; /* Never reached */
}
static int goodix_irq_direction_input(struct goodix_ts_data *ts)
{
switch (ts->irq_pin_access_method) {
case IRQ_PIN_ACCESS_NONE:
dev_err(&ts->client->dev,
"%s called without an irq_pin_access_method set\n",
__func__);
return -EINVAL;
case IRQ_PIN_ACCESS_GPIO:
return gpiod_direction_input(ts->gpiod_int);
case IRQ_PIN_ACCESS_ACPI_GPIO:
return gpiod_direction_input(ts->gpiod_int);
case IRQ_PIN_ACCESS_ACPI_METHOD:
return goodix_pin_acpi_direction_input(ts);
}
return -EINVAL; /* Never reached */
}
int goodix_int_sync(struct goodix_ts_data *ts)
{
int error;
error = goodix_irq_direction_output(ts, 0);
if (error)
goto error;
msleep(50); /* T5: 50ms */
error = goodix_irq_direction_input(ts);
if (error)
goto error;
return 0;
error:
dev_err(&ts->client->dev, "Controller irq sync failed.\n");
return error;
}
/**
* goodix_reset_no_int_sync - Reset device, leaving interrupt line in output mode
*
* @ts: goodix_ts_data pointer
*/
int goodix_reset_no_int_sync(struct goodix_ts_data *ts)
{
int error;
/* begin select I2C slave addr */
error = gpiod_direction_output(ts->gpiod_rst, 0);
if (error)
goto error;
msleep(20); /* T2: > 10ms */
/* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */
error = goodix_irq_direction_output(ts, ts->client->addr == 0x14);
if (error)
goto error;
usleep_range(100, 2000); /* T3: > 100us */
error = gpiod_direction_output(ts->gpiod_rst, 1);
if (error)
goto error;
usleep_range(6000, 10000); /* T4: > 5ms */
/*
* Put the reset pin back in to input / high-impedance mode to save
* power. Only do this in the non ACPI case since some ACPI boards
* don't have a pull-up, so there the reset pin must stay active-high.
*/
if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_GPIO) {
error = gpiod_direction_input(ts->gpiod_rst);
if (error)
goto error;
}
return 0;
error:
dev_err(&ts->client->dev, "Controller reset failed.\n");
return error;
}
/**
* goodix_reset - Reset device during power on
*
* @ts: goodix_ts_data pointer
*/
static int goodix_reset(struct goodix_ts_data *ts)
{
int error;
error = goodix_reset_no_int_sync(ts);
if (error)
return error;
return goodix_int_sync(ts);
}
#ifdef ACPI_GPIO_SUPPORT
static const struct acpi_gpio_params first_gpio = { 0, 0, false };
static const struct acpi_gpio_params second_gpio = { 1, 0, false };
static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = {
{ GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 },
{ GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 },
{ },
};
static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = {
{ GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 },
{ GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 },
{ },
};
static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = {
{ GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 },
{ },
};
static int goodix_resource(struct acpi_resource *ares, void *data)
{
struct goodix_ts_data *ts = data;
struct device *dev = &ts->client->dev;
struct acpi_resource_gpio *gpio;
if (acpi_gpio_get_irq_resource(ares, &gpio)) {
if (ts->gpio_int_idx == -1) {
ts->gpio_int_idx = ts->gpio_count;
} else {
dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n");
ts->gpio_int_idx = -2;
}
ts->gpio_count++;
} else if (acpi_gpio_get_io_resource(ares, &gpio))
ts->gpio_count++;
return 0;
}
/*
* This function gets called in case we fail to get the irq GPIO directly
* because the ACPI tables lack GPIO-name to APCI _CRS index mappings
* (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data).
* In that case we add our own mapping and then goodix_get_gpio_config()
* retries to get the GPIOs based on the added mapping.
*/
static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts)
{
const struct acpi_gpio_mapping *gpio_mapping = NULL;
struct device *dev = &ts->client->dev;
LIST_HEAD(resources);
int irq, ret;
ts->gpio_count = 0;
ts->gpio_int_idx = -1;
ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources,
goodix_resource, ts);
if (ret < 0) {
dev_err(dev, "Error getting ACPI resources: %d\n", ret);
return ret;
}
acpi_dev_free_resource_list(&resources);
/*
* CHT devices should have a GpioInt + a regular GPIO ACPI resource.
* Some CHT devices have a bug (where the also is bogus Interrupt
* resource copied from a previous BYT based generation). i2c-core-acpi
* will use the non-working Interrupt resource, fix this up.
*/
if (soc_intel_is_cht() && ts->gpio_count == 2 && ts->gpio_int_idx != -1) {
irq = acpi_dev_gpio_irq_get(ACPI_COMPANION(dev), 0);
if (irq > 0 && irq != ts->client->irq) {
dev_warn(dev, "Overriding IRQ %d -> %d\n", ts->client->irq, irq);
ts->client->irq = irq;
}
}
if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) {
ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO;
gpio_mapping = acpi_goodix_int_first_gpios;
} else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) {
ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO;
gpio_mapping = acpi_goodix_int_last_gpios;
} else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 &&
acpi_has_method(ACPI_HANDLE(dev), "INTI") &&
acpi_has_method(ACPI_HANDLE(dev), "INTO")) {
dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n");
ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD;
gpio_mapping = acpi_goodix_reset_only_gpios;
} else if (soc_intel_is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) {
dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n");
ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO;
gpio_mapping = acpi_goodix_int_last_gpios;
} else {
dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n",
ts->gpio_count, ts->gpio_int_idx);
/*
* On some devices _PS0 does a reset for us and
* sometimes this is necessary for things to work.
*/
acpi_device_fix_up_power(ACPI_COMPANION(dev));
return -EINVAL;
}
/*
* Normally we put the reset pin in input / high-impedance mode to save
* power. But some x86/ACPI boards don't have a pull-up, so for the ACPI
* case, leave the pin as is. This results in the pin not being touched
* at all on x86/ACPI boards, except when needed for error-recover.
*/
ts->gpiod_rst_flags = GPIOD_ASIS;
return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping);
}
#else
static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts)
{
return -EINVAL;
}
#endif /* CONFIG_X86 && CONFIG_ACPI */
/**
* goodix_get_gpio_config - Get GPIO config from ACPI/DT
*
* @ts: goodix_ts_data pointer
*/
static int goodix_get_gpio_config(struct goodix_ts_data *ts)
{
struct device *dev;
struct gpio_desc *gpiod;
bool added_acpi_mappings = false;
if (!ts->client)
return -EINVAL;
dev = &ts->client->dev;
/*
* By default we request the reset pin as input, leaving it in
* high-impedance when not resetting the controller to save power.
*/
ts->gpiod_rst_flags = GPIOD_IN;
ts->avdd28 = devm_regulator_get(dev, "AVDD28");
if (IS_ERR(ts->avdd28))
return dev_err_probe(dev, PTR_ERR(ts->avdd28), "Failed to get AVDD28 regulator\n");
ts->vddio = devm_regulator_get(dev, "VDDIO");
if (IS_ERR(ts->vddio))
return dev_err_probe(dev, PTR_ERR(ts->vddio), "Failed to get VDDIO regulator\n");
retry_get_irq_gpio:
/* Get the interrupt GPIO pin number */
gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN);
if (IS_ERR(gpiod))
return dev_err_probe(dev, PTR_ERR(gpiod), "Failed to get %s GPIO\n",
GOODIX_GPIO_INT_NAME);
if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) {
added_acpi_mappings = true;
if (goodix_add_acpi_gpio_mappings(ts) == 0)
goto retry_get_irq_gpio;
}
ts->gpiod_int = gpiod;
/* Get the reset line GPIO pin number */
gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, ts->gpiod_rst_flags);
if (IS_ERR(gpiod))
return dev_err_probe(dev, PTR_ERR(gpiod), "Failed to get %s GPIO\n",
GOODIX_GPIO_RST_NAME);
ts->gpiod_rst = gpiod;
switch (ts->irq_pin_access_method) {
case IRQ_PIN_ACCESS_ACPI_GPIO:
/*
* We end up here if goodix_add_acpi_gpio_mappings() has
* called devm_acpi_dev_add_driver_gpios() because the ACPI
* tables did not contain name to index mappings.
* Check that we successfully got both GPIOs after we've
* added our own acpi_gpio_mapping and if we did not get both
* GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE.
*/
if (!ts->gpiod_int || !ts->gpiod_rst)
ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE;
break;
case IRQ_PIN_ACCESS_ACPI_METHOD:
if (!ts->gpiod_rst)
ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE;
break;
default:
if (ts->gpiod_int && ts->gpiod_rst) {
ts->reset_controller_at_probe = true;
ts->load_cfg_from_disk = true;
ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO;
}
}
return 0;
}
/**
* goodix_read_config - Read the embedded configuration of the panel
*
* @ts: our goodix_ts_data pointer
*
* Must be called during probe
*/
static void goodix_read_config(struct goodix_ts_data *ts)
{
int x_max, y_max;
int error;
/*
* On controllers where we need to upload the firmware
* (controllers without flash) ts->config already has the config
* at this point and the controller itself does not have it yet!
*/
if (!ts->firmware_name) {
error = goodix_i2c_read(ts->client, ts->chip->config_addr,
ts->config, ts->chip->config_len);
if (error) {
ts->int_trigger_type = GOODIX_INT_TRIGGER;
ts->max_touch_num = GOODIX_MAX_CONTACTS;
return;
}
}
ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03;
ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f;
x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]);
y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]);
if (x_max && y_max) {
input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1);
input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1);
}
ts->chip->calc_config_checksum(ts);
}
/**
* goodix_read_version - Read goodix touchscreen version
*
* @ts: our goodix_ts_data pointer
*/
static int goodix_read_version(struct goodix_ts_data *ts)
{
int error;
u8 buf[6];
char id_str[GOODIX_ID_MAX_LEN + 1];
error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf));
if (error)
return error;
memcpy(id_str, buf, GOODIX_ID_MAX_LEN);
id_str[GOODIX_ID_MAX_LEN] = 0;
strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1);
ts->version = get_unaligned_le16(&buf[4]);
dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id,
ts->version);
return 0;
}
/**
* goodix_i2c_test - I2C test function to check if the device answers.
*
* @client: the i2c client
*/
static int goodix_i2c_test(struct i2c_client *client)
{
int retry = 0;
int error;
u8 test;
while (retry++ < 2) {
error = goodix_i2c_read(client, GOODIX_REG_ID, &test, 1);
if (!error)
return 0;
msleep(20);
}
return error;
}
/**
* goodix_configure_dev - Finish device initialization
*
* @ts: our goodix_ts_data pointer
*
* Must be called from probe to finish initialization of the device.
* Contains the common initialization code for both devices that
* declare gpio pins and devices that do not. It is either called
* directly from probe or from request_firmware_wait callback.
*/
static int goodix_configure_dev(struct goodix_ts_data *ts)
{
int error;
int i;
ts->int_trigger_type = GOODIX_INT_TRIGGER;
ts->max_touch_num = GOODIX_MAX_CONTACTS;
ts->input_dev = devm_input_allocate_device(&ts->client->dev);
if (!ts->input_dev) {
dev_err(&ts->client->dev, "Failed to allocate input device.");
return -ENOMEM;
}
ts->input_dev->name = "Goodix Capacitive TouchScreen";
ts->input_dev->phys = "input/ts";
ts->input_dev->id.bustype = BUS_I2C;
ts->input_dev->id.vendor = 0x0416;
if (kstrtou16(ts->id, 10, &ts->input_dev->id.product))
ts->input_dev->id.product = 0x1001;
ts->input_dev->id.version = ts->version;
ts->input_dev->keycode = ts->keymap;
ts->input_dev->keycodesize = sizeof(ts->keymap[0]);
ts->input_dev->keycodemax = GOODIX_MAX_KEYS;
/* Capacitive Windows/Home button on some devices */
for (i = 0; i < GOODIX_MAX_KEYS; ++i) {
if (i == 0)
ts->keymap[i] = KEY_LEFTMETA;
else
ts->keymap[i] = KEY_F1 + (i - 1);
input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]);
}
input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X);
input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y);
input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
retry_read_config:
/* Read configuration and apply touchscreen parameters */
goodix_read_config(ts);
/* Try overriding touchscreen parameters via device properties */
touchscreen_parse_properties(ts->input_dev, true, &ts->prop);
if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) {
if (!ts->reset_controller_at_probe &&
ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) {
dev_info(&ts->client->dev, "Config not set, resetting controller\n");
/* Retry after a controller reset */
ts->reset_controller_at_probe = true;
error = goodix_reset(ts);
if (error)
return error;
goto retry_read_config;
}
dev_err(&ts->client->dev,
"Invalid config (%d, %d, %d), using defaults\n",
ts->prop.max_x, ts->prop.max_y, ts->max_touch_num);
ts->prop.max_x = GOODIX_MAX_WIDTH - 1;
ts->prop.max_y = GOODIX_MAX_HEIGHT - 1;
ts->max_touch_num = GOODIX_MAX_CONTACTS;
input_abs_set_max(ts->input_dev,
ABS_MT_POSITION_X, ts->prop.max_x);
input_abs_set_max(ts->input_dev,
ABS_MT_POSITION_Y, ts->prop.max_y);
}
if (dmi_check_system(nine_bytes_report)) {
ts->contact_size = 9;
dev_dbg(&ts->client->dev,
"Non-standard 9-bytes report format quirk\n");
}
if (dmi_check_system(inverted_x_screen)) {
ts->prop.invert_x = true;
dev_dbg(&ts->client->dev,
"Applying 'inverted x screen' quirk\n");
}
error = input_mt_init_slots(ts->input_dev, ts->max_touch_num,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
if (error) {
dev_err(&ts->client->dev,
"Failed to initialize MT slots: %d", error);
return error;
}
error = input_register_device(ts->input_dev);
if (error) {
dev_err(&ts->client->dev,
"Failed to register input device: %d", error);
return error;
}
/*
* Create the input_pen device before goodix_request_irq() calls
* devm_request_threaded_irq() so that the devm framework frees
* it after disabling the irq.
* Unfortunately there is no way to detect if the touchscreen has pen
* support, so registering the dev is delayed till the first pen event.
*/
error = goodix_create_pen_input(ts);
if (error)
return error;
ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT;
error = goodix_request_irq(ts);
if (error) {
dev_err(&ts->client->dev, "request IRQ failed: %d\n", error);
return error;
}
return 0;
}
/**
* goodix_config_cb - Callback to finish device init
*
* @cfg: firmware config
* @ctx: our goodix_ts_data pointer
*
* request_firmware_wait callback that finishes
* initialization of the device.
*/
static void goodix_config_cb(const struct firmware *cfg, void *ctx)
{
struct goodix_ts_data *ts = ctx;
int error;
if (ts->firmware_name) {
if (!cfg)
goto err_release_cfg;
error = goodix_check_cfg(ts, cfg->data, cfg->size);
if (error)
goto err_release_cfg;
memcpy(ts->config, cfg->data, cfg->size);
} else if (cfg) {
/* send device configuration to the firmware */
error = goodix_send_cfg(ts, cfg->data, cfg->size);
if (error)
goto err_release_cfg;
}
goodix_configure_dev(ts);
err_release_cfg:
release_firmware(cfg);
complete_all(&ts->firmware_loading_complete);
}
static void goodix_disable_regulators(void *arg)
{
struct goodix_ts_data *ts = arg;
regulator_disable(ts->vddio);
regulator_disable(ts->avdd28);
}
static int goodix_ts_probe(struct i2c_client *client)
{
struct goodix_ts_data *ts;
const char *cfg_name;
int error;
dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr);
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "I2C check functionality failed.\n");
return -ENXIO;
}
ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
ts->client = client;
i2c_set_clientdata(client, ts);
init_completion(&ts->firmware_loading_complete);
ts->contact_size = GOODIX_CONTACT_SIZE;
error = goodix_get_gpio_config(ts);
if (error)
return error;
/* power up the controller */
error = regulator_enable(ts->avdd28);
if (error) {
dev_err(&client->dev,
"Failed to enable AVDD28 regulator: %d\n",
error);
return error;
}
error = regulator_enable(ts->vddio);
if (error) {
dev_err(&client->dev,
"Failed to enable VDDIO regulator: %d\n",
error);
regulator_disable(ts->avdd28);
return error;
}
error = devm_add_action_or_reset(&client->dev,
goodix_disable_regulators, ts);
if (error)
return error;
reset:
if (ts->reset_controller_at_probe) {
/* reset the controller */
error = goodix_reset(ts);
if (error)
return error;
}
error = goodix_i2c_test(client);
if (error) {
if (!ts->reset_controller_at_probe &&
ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) {
/* Retry after a controller reset */
ts->reset_controller_at_probe = true;
goto reset;
}
dev_err(&client->dev, "I2C communication failure: %d\n", error);
return error;
}
error = goodix_firmware_check(ts);
if (error)
return error;
error = goodix_read_version(ts);
if (error)
return error;
ts->chip = goodix_get_chip_data(ts->id);
if (ts->load_cfg_from_disk) {
/* update device config */
error = device_property_read_string(&client->dev,
"goodix,config-name",
&cfg_name);
if (!error)
snprintf(ts->cfg_name, sizeof(ts->cfg_name),
"goodix/%s", cfg_name);
else
snprintf(ts->cfg_name, sizeof(ts->cfg_name),
"goodix_%s_cfg.bin", ts->id);
error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name,
&client->dev, GFP_KERNEL, ts,
goodix_config_cb);
if (error) {
dev_err(&client->dev,
"Failed to invoke firmware loader: %d\n",
error);
return error;
}
return 0;
} else {
error = goodix_configure_dev(ts);
if (error)
return error;
}
return 0;
}
static void goodix_ts_remove(struct i2c_client *client)
{
struct goodix_ts_data *ts = i2c_get_clientdata(client);
if (ts->load_cfg_from_disk)
wait_for_completion(&ts->firmware_loading_complete);
}
static int goodix_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct goodix_ts_data *ts = i2c_get_clientdata(client);
int error;
if (ts->load_cfg_from_disk)
wait_for_completion(&ts->firmware_loading_complete);
/* We need gpio pins to suspend/resume */
if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) {
disable_irq(client->irq);
return 0;
}
/* Free IRQ as IRQ pin is used as output in the suspend sequence */
goodix_free_irq(ts);
/* Save reference (calibration) info if necessary */
goodix_save_bak_ref(ts);
/* Output LOW on the INT pin for 5 ms */
error = goodix_irq_direction_output(ts, 0);
if (error) {
goodix_request_irq(ts);
return error;
}
usleep_range(5000, 6000);
error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND,
GOODIX_CMD_SCREEN_OFF);
if (error) {
goodix_irq_direction_input(ts);
goodix_request_irq(ts);
return -EAGAIN;
}
/*
* The datasheet specifies that the interval between sending screen-off
* command and wake-up should be longer than 58 ms. To avoid waking up
* sooner, delay 58ms here.
*/
msleep(58);
return 0;
}
static int goodix_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct goodix_ts_data *ts = i2c_get_clientdata(client);
u8 config_ver;
int error;
if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) {
enable_irq(client->irq);
return 0;
}
/*
* Exit sleep mode by outputting HIGH level to INT pin
* for 2ms~5ms.
*/
error = goodix_irq_direction_output(ts, 1);
if (error)
return error;
usleep_range(2000, 5000);
error = goodix_int_sync(ts);
if (error)
return error;
error = goodix_i2c_read(ts->client, ts->chip->config_addr,
&config_ver, 1);
if (!error && config_ver != ts->config[0])
dev_info(dev, "Config version mismatch %d != %d, resetting controller\n",
config_ver, ts->config[0]);
if (error != 0 || config_ver != ts->config[0]) {
error = goodix_reset(ts);
if (error)
return error;
error = goodix_send_cfg(ts, ts->config, ts->chip->config_len);
if (error)
return error;
}
error = goodix_request_irq(ts);
if (error)
return error;
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume);
static const struct i2c_device_id goodix_ts_id[] = {
{ "GDIX1001:00", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, goodix_ts_id);
#ifdef CONFIG_ACPI
static const struct acpi_device_id goodix_acpi_match[] = {
{ "GDIX1001", 0 },
{ "GDIX1002", 0 },
{ "GDX9110", 0 },
{ }
};
MODULE_DEVICE_TABLE(acpi, goodix_acpi_match);
#endif
#ifdef CONFIG_OF
static const struct of_device_id goodix_of_match[] = {
{ .compatible = "goodix,gt1151" },
{ .compatible = "goodix,gt1158" },
{ .compatible = "goodix,gt5663" },
{ .compatible = "goodix,gt5688" },
{ .compatible = "goodix,gt911" },
{ .compatible = "goodix,gt9110" },
{ .compatible = "goodix,gt912" },
{ .compatible = "goodix,gt9147" },
{ .compatible = "goodix,gt917s" },
{ .compatible = "goodix,gt927" },
{ .compatible = "goodix,gt9271" },
{ .compatible = "goodix,gt928" },
{ .compatible = "goodix,gt9286" },
{ .compatible = "goodix,gt967" },
{ }
};
MODULE_DEVICE_TABLE(of, goodix_of_match);
#endif
static struct i2c_driver goodix_ts_driver = {
.probe = goodix_ts_probe,
.remove = goodix_ts_remove,
.id_table = goodix_ts_id,
.driver = {
.name = "Goodix-TS",
.acpi_match_table = ACPI_PTR(goodix_acpi_match),
.of_match_table = of_match_ptr(goodix_of_match),
.pm = pm_sleep_ptr(&goodix_pm_ops),
},
};
module_i2c_driver(goodix_ts_driver);
MODULE_AUTHOR("Benjamin Tissoires <[email protected]>");
MODULE_AUTHOR("Bastien Nocera <[email protected]>");
MODULE_DESCRIPTION("Goodix touchscreen driver");
MODULE_LICENSE("GPL v2");
|
linux-master
|
drivers/input/touchscreen/goodix.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for Himax hx83112b touchscreens
*
* Copyright (C) 2022 Job Noorman <[email protected]>
*
* This code is based on "Himax Android Driver Sample Code for QCT platform":
*
* Copyright (C) 2017 Himax Corporation.
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/regmap.h>
#define HIMAX_ID_83112B 0x83112b
#define HIMAX_MAX_POINTS 10
#define HIMAX_REG_CFG_SET_ADDR 0x00
#define HIMAX_REG_CFG_INIT_READ 0x0c
#define HIMAX_REG_CFG_READ_VALUE 0x08
#define HIMAX_REG_READ_EVENT 0x30
#define HIMAX_CFG_PRODUCT_ID 0x900000d0
#define HIMAX_INVALID_COORD 0xffff
struct himax_event_point {
__be16 x;
__be16 y;
} __packed;
struct himax_event {
struct himax_event_point points[HIMAX_MAX_POINTS];
u8 majors[HIMAX_MAX_POINTS];
u8 pad0[2];
u8 num_points;
u8 pad1[2];
u8 checksum_fix;
} __packed;
static_assert(sizeof(struct himax_event) == 56);
struct himax_ts_data {
struct gpio_desc *gpiod_rst;
struct input_dev *input_dev;
struct i2c_client *client;
struct regmap *regmap;
struct touchscreen_properties props;
};
static const struct regmap_config himax_regmap_config = {
.reg_bits = 8,
.val_bits = 32,
.val_format_endian = REGMAP_ENDIAN_LITTLE,
};
static int himax_read_config(struct himax_ts_data *ts, u32 address, u32 *dst)
{
int error;
error = regmap_write(ts->regmap, HIMAX_REG_CFG_SET_ADDR, address);
if (error)
return error;
error = regmap_write(ts->regmap, HIMAX_REG_CFG_INIT_READ, 0x0);
if (error)
return error;
error = regmap_read(ts->regmap, HIMAX_REG_CFG_READ_VALUE, dst);
if (error)
return error;
return 0;
}
static void himax_reset(struct himax_ts_data *ts)
{
gpiod_set_value_cansleep(ts->gpiod_rst, 1);
/* Delay copied from downstream driver */
msleep(20);
gpiod_set_value_cansleep(ts->gpiod_rst, 0);
/*
* The downstream driver doesn't contain this delay but is seems safer
* to include it. The range is just a guess that seems to work well.
*/
usleep_range(1000, 1100);
}
static int himax_read_product_id(struct himax_ts_data *ts, u32 *product_id)
{
int error;
error = himax_read_config(ts, HIMAX_CFG_PRODUCT_ID, product_id);
if (error)
return error;
*product_id >>= 8;
return 0;
}
static int himax_check_product_id(struct himax_ts_data *ts)
{
int error;
u32 product_id;
error = himax_read_product_id(ts, &product_id);
if (error)
return error;
dev_dbg(&ts->client->dev, "Product id: %x\n", product_id);
switch (product_id) {
case HIMAX_ID_83112B:
return 0;
default:
dev_err(&ts->client->dev,
"Unknown product id: %x\n", product_id);
return -EINVAL;
}
}
static int himax_input_register(struct himax_ts_data *ts)
{
int error;
ts->input_dev = devm_input_allocate_device(&ts->client->dev);
if (!ts->input_dev) {
dev_err(&ts->client->dev, "Failed to allocate input device\n");
return -ENOMEM;
}
ts->input_dev->name = "Himax Touchscreen";
input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X);
input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y);
input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 200, 0, 0);
input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 200, 0, 0);
touchscreen_parse_properties(ts->input_dev, true, &ts->props);
error = input_mt_init_slots(ts->input_dev, HIMAX_MAX_POINTS,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
if (error) {
dev_err(&ts->client->dev,
"Failed to initialize MT slots: %d\n", error);
return error;
}
error = input_register_device(ts->input_dev);
if (error) {
dev_err(&ts->client->dev,
"Failed to register input device: %d\n", error);
return error;
}
return 0;
}
static u8 himax_event_get_num_points(const struct himax_event *event)
{
if (event->num_points == 0xff)
return 0;
else
return event->num_points & 0x0f;
}
static bool himax_process_event_point(struct himax_ts_data *ts,
const struct himax_event *event,
int point_index)
{
const struct himax_event_point *point = &event->points[point_index];
u16 x = be16_to_cpu(point->x);
u16 y = be16_to_cpu(point->y);
u8 w = event->majors[point_index];
if (x == HIMAX_INVALID_COORD || y == HIMAX_INVALID_COORD)
return false;
input_mt_slot(ts->input_dev, point_index);
input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
touchscreen_report_pos(ts->input_dev, &ts->props, x, y, true);
input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, w);
input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, w);
return true;
}
static void himax_process_event(struct himax_ts_data *ts,
const struct himax_event *event)
{
int i;
int num_points_left = himax_event_get_num_points(event);
for (i = 0; i < HIMAX_MAX_POINTS && num_points_left > 0; i++) {
if (himax_process_event_point(ts, event, i))
num_points_left--;
}
input_mt_sync_frame(ts->input_dev);
input_sync(ts->input_dev);
}
static bool himax_verify_checksum(struct himax_ts_data *ts,
const struct himax_event *event)
{
u8 *data = (u8 *)event;
int i;
u16 checksum = 0;
for (i = 0; i < sizeof(*event); i++)
checksum += data[i];
if ((checksum & 0x00ff) != 0) {
dev_err(&ts->client->dev, "Wrong event checksum: %04x\n",
checksum);
return false;
}
return true;
}
static int himax_handle_input(struct himax_ts_data *ts)
{
int error;
struct himax_event event;
error = regmap_raw_read(ts->regmap, HIMAX_REG_READ_EVENT, &event,
sizeof(event));
if (error) {
dev_err(&ts->client->dev, "Failed to read input event: %d\n",
error);
return error;
}
/*
* Only process the current event when it has a valid checksum but
* don't consider it a fatal error when it doesn't.
*/
if (himax_verify_checksum(ts, &event))
himax_process_event(ts, &event);
return 0;
}
static irqreturn_t himax_irq_handler(int irq, void *dev_id)
{
int error;
struct himax_ts_data *ts = dev_id;
error = himax_handle_input(ts);
if (error)
return IRQ_NONE;
return IRQ_HANDLED;
}
static int himax_probe(struct i2c_client *client)
{
int error;
struct device *dev = &client->dev;
struct himax_ts_data *ts;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(dev, "I2C check functionality failed\n");
return -ENXIO;
}
ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
i2c_set_clientdata(client, ts);
ts->client = client;
ts->regmap = devm_regmap_init_i2c(client, &himax_regmap_config);
error = PTR_ERR_OR_ZERO(ts->regmap);
if (error) {
dev_err(dev, "Failed to initialize regmap: %d\n", error);
return error;
}
ts->gpiod_rst = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
error = PTR_ERR_OR_ZERO(ts->gpiod_rst);
if (error) {
dev_err(dev, "Failed to get reset GPIO: %d\n", error);
return error;
}
himax_reset(ts);
error = himax_check_product_id(ts);
if (error)
return error;
error = himax_input_register(ts);
if (error)
return error;
error = devm_request_threaded_irq(dev, client->irq, NULL,
himax_irq_handler, IRQF_ONESHOT,
client->name, ts);
if (error)
return error;
return 0;
}
static int himax_suspend(struct device *dev)
{
struct himax_ts_data *ts = dev_get_drvdata(dev);
disable_irq(ts->client->irq);
return 0;
}
static int himax_resume(struct device *dev)
{
struct himax_ts_data *ts = dev_get_drvdata(dev);
enable_irq(ts->client->irq);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(himax_pm_ops, himax_suspend, himax_resume);
static const struct i2c_device_id himax_ts_id[] = {
{ "hx83112b", 0 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(i2c, himax_ts_id);
#ifdef CONFIG_OF
static const struct of_device_id himax_of_match[] = {
{ .compatible = "himax,hx83112b" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, himax_of_match);
#endif
static struct i2c_driver himax_ts_driver = {
.probe = himax_probe,
.id_table = himax_ts_id,
.driver = {
.name = "Himax-hx83112b-TS",
.of_match_table = of_match_ptr(himax_of_match),
.pm = pm_sleep_ptr(&himax_pm_ops),
},
};
module_i2c_driver(himax_ts_driver);
MODULE_AUTHOR("Job Noorman <[email protected]>");
MODULE_DESCRIPTION("Himax hx83112b touchscreen driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/himax_hx83112b.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* AD7879/AD7889 based touchscreen and GPIO driver
*
* Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc.
*
* History:
* Copyright (c) 2005 David Brownell
* Copyright (c) 2006 Nokia Corporation
* Various changes: Imre Deak <[email protected]>
*
* Using code from:
* - corgi_ts.c
* Copyright (C) 2004-2005 Richard Purdie
* - omap_ts.[hc], ads7846.h, ts_osk.c
* Copyright (C) 2002 MontaVista Software
* Copyright (C) 2004 Texas Instruments
* Copyright (C) 2005 Dirk Behme
* - ad7877.c
* Copyright (C) 2006-2008 Analog Devices Inc.
*/
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/gpio/driver.h>
#include <linux/input/touchscreen.h>
#include <linux/module.h>
#include "ad7879.h"
#define AD7879_REG_ZEROS 0
#define AD7879_REG_CTRL1 1
#define AD7879_REG_CTRL2 2
#define AD7879_REG_CTRL3 3
#define AD7879_REG_AUX1HIGH 4
#define AD7879_REG_AUX1LOW 5
#define AD7879_REG_TEMP1HIGH 6
#define AD7879_REG_TEMP1LOW 7
#define AD7879_REG_XPLUS 8
#define AD7879_REG_YPLUS 9
#define AD7879_REG_Z1 10
#define AD7879_REG_Z2 11
#define AD7879_REG_AUXVBAT 12
#define AD7879_REG_TEMP 13
#define AD7879_REG_REVID 14
/* Control REG 1 */
#define AD7879_TMR(x) ((x & 0xFF) << 0)
#define AD7879_ACQ(x) ((x & 0x3) << 8)
#define AD7879_MODE_NOC (0 << 10) /* Do not convert */
#define AD7879_MODE_SCC (1 << 10) /* Single channel conversion */
#define AD7879_MODE_SEQ0 (2 << 10) /* Sequence 0 in Slave Mode */
#define AD7879_MODE_SEQ1 (3 << 10) /* Sequence 1 in Master Mode */
#define AD7879_MODE_INT (1 << 15) /* PENIRQ disabled INT enabled */
/* Control REG 2 */
#define AD7879_FCD(x) ((x & 0x3) << 0)
#define AD7879_RESET (1 << 4)
#define AD7879_MFS(x) ((x & 0x3) << 5)
#define AD7879_AVG(x) ((x & 0x3) << 7)
#define AD7879_SER (1 << 9) /* non-differential */
#define AD7879_DFR (0 << 9) /* differential */
#define AD7879_GPIOPOL (1 << 10)
#define AD7879_GPIODIR (1 << 11)
#define AD7879_GPIO_DATA (1 << 12)
#define AD7879_GPIO_EN (1 << 13)
#define AD7879_PM(x) ((x & 0x3) << 14)
#define AD7879_PM_SHUTDOWN (0)
#define AD7879_PM_DYN (1)
#define AD7879_PM_FULLON (2)
/* Control REG 3 */
#define AD7879_TEMPMASK_BIT (1<<15)
#define AD7879_AUXVBATMASK_BIT (1<<14)
#define AD7879_INTMODE_BIT (1<<13)
#define AD7879_GPIOALERTMASK_BIT (1<<12)
#define AD7879_AUXLOW_BIT (1<<11)
#define AD7879_AUXHIGH_BIT (1<<10)
#define AD7879_TEMPLOW_BIT (1<<9)
#define AD7879_TEMPHIGH_BIT (1<<8)
#define AD7879_YPLUS_BIT (1<<7)
#define AD7879_XPLUS_BIT (1<<6)
#define AD7879_Z1_BIT (1<<5)
#define AD7879_Z2_BIT (1<<4)
#define AD7879_AUX_BIT (1<<3)
#define AD7879_VBAT_BIT (1<<2)
#define AD7879_TEMP_BIT (1<<1)
enum {
AD7879_SEQ_YPOS = 0,
AD7879_SEQ_XPOS = 1,
AD7879_SEQ_Z1 = 2,
AD7879_SEQ_Z2 = 3,
AD7879_NR_SENSE = 4,
};
#define MAX_12BIT ((1<<12)-1)
#define TS_PEN_UP_TIMEOUT msecs_to_jiffies(50)
struct ad7879 {
struct regmap *regmap;
struct device *dev;
struct input_dev *input;
struct timer_list timer;
#ifdef CONFIG_GPIOLIB
struct gpio_chip gc;
struct mutex mutex;
#endif
unsigned int irq;
bool disabled; /* P: input->mutex */
bool suspended; /* P: input->mutex */
bool swap_xy;
u16 conversion_data[AD7879_NR_SENSE];
char phys[32];
u8 first_conversion_delay;
u8 acquisition_time;
u8 averaging;
u8 pen_down_acc_interval;
u8 median;
u16 x_plate_ohms;
u16 cmd_crtl1;
u16 cmd_crtl2;
u16 cmd_crtl3;
int x;
int y;
int Rt;
};
static int ad7879_read(struct ad7879 *ts, u8 reg)
{
unsigned int val;
int error;
error = regmap_read(ts->regmap, reg, &val);
if (error) {
dev_err(ts->dev, "failed to read register %#02x: %d\n",
reg, error);
return error;
}
return val;
}
static int ad7879_write(struct ad7879 *ts, u8 reg, u16 val)
{
int error;
error = regmap_write(ts->regmap, reg, val);
if (error) {
dev_err(ts->dev,
"failed to write %#04x to register %#02x: %d\n",
val, reg, error);
return error;
}
return 0;
}
static int ad7879_report(struct ad7879 *ts)
{
struct input_dev *input_dev = ts->input;
unsigned Rt;
u16 x, y, z1, z2;
x = ts->conversion_data[AD7879_SEQ_XPOS] & MAX_12BIT;
y = ts->conversion_data[AD7879_SEQ_YPOS] & MAX_12BIT;
z1 = ts->conversion_data[AD7879_SEQ_Z1] & MAX_12BIT;
z2 = ts->conversion_data[AD7879_SEQ_Z2] & MAX_12BIT;
if (ts->swap_xy)
swap(x, y);
/*
* The samples processed here are already preprocessed by the AD7879.
* The preprocessing function consists of a median and an averaging
* filter. The combination of these two techniques provides a robust
* solution, discarding the spurious noise in the signal and keeping
* only the data of interest. The size of both filters is
* programmable. (dev.platform_data, see linux/platform_data/ad7879.h)
* Other user-programmable conversion controls include variable
* acquisition time, and first conversion delay. Up to 16 averages can
* be taken per conversion.
*/
if (likely(x && z1)) {
/* compute touch pressure resistance using equation #1 */
Rt = (z2 - z1) * x * ts->x_plate_ohms;
Rt /= z1;
Rt = (Rt + 2047) >> 12;
/*
* Sample found inconsistent, pressure is beyond
* the maximum. Don't report it to user space.
*/
if (Rt > input_abs_get_max(input_dev, ABS_PRESSURE))
return -EINVAL;
/*
* Note that we delay reporting events by one sample.
* This is done to avoid reporting last sample of the
* touch sequence, which may be incomplete if finger
* leaves the surface before last reading is taken.
*/
if (timer_pending(&ts->timer)) {
/* Touch continues */
input_report_key(input_dev, BTN_TOUCH, 1);
input_report_abs(input_dev, ABS_X, ts->x);
input_report_abs(input_dev, ABS_Y, ts->y);
input_report_abs(input_dev, ABS_PRESSURE, ts->Rt);
input_sync(input_dev);
}
ts->x = x;
ts->y = y;
ts->Rt = Rt;
return 0;
}
return -EINVAL;
}
static void ad7879_ts_event_release(struct ad7879 *ts)
{
struct input_dev *input_dev = ts->input;
input_report_abs(input_dev, ABS_PRESSURE, 0);
input_report_key(input_dev, BTN_TOUCH, 0);
input_sync(input_dev);
}
static void ad7879_timer(struct timer_list *t)
{
struct ad7879 *ts = from_timer(ts, t, timer);
ad7879_ts_event_release(ts);
}
static irqreturn_t ad7879_irq(int irq, void *handle)
{
struct ad7879 *ts = handle;
int error;
error = regmap_bulk_read(ts->regmap, AD7879_REG_XPLUS,
ts->conversion_data, AD7879_NR_SENSE);
if (error)
dev_err_ratelimited(ts->dev, "failed to read %#02x: %d\n",
AD7879_REG_XPLUS, error);
else if (!ad7879_report(ts))
mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT);
return IRQ_HANDLED;
}
static void __ad7879_enable(struct ad7879 *ts)
{
ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2);
ad7879_write(ts, AD7879_REG_CTRL3, ts->cmd_crtl3);
ad7879_write(ts, AD7879_REG_CTRL1, ts->cmd_crtl1);
enable_irq(ts->irq);
}
static void __ad7879_disable(struct ad7879 *ts)
{
u16 reg = (ts->cmd_crtl2 & ~AD7879_PM(-1)) |
AD7879_PM(AD7879_PM_SHUTDOWN);
disable_irq(ts->irq);
if (del_timer_sync(&ts->timer))
ad7879_ts_event_release(ts);
ad7879_write(ts, AD7879_REG_CTRL2, reg);
}
static int ad7879_open(struct input_dev *input)
{
struct ad7879 *ts = input_get_drvdata(input);
/* protected by input->mutex */
if (!ts->disabled && !ts->suspended)
__ad7879_enable(ts);
return 0;
}
static void ad7879_close(struct input_dev *input)
{
struct ad7879 *ts = input_get_drvdata(input);
/* protected by input->mutex */
if (!ts->disabled && !ts->suspended)
__ad7879_disable(ts);
}
static int __maybe_unused ad7879_suspend(struct device *dev)
{
struct ad7879 *ts = dev_get_drvdata(dev);
mutex_lock(&ts->input->mutex);
if (!ts->suspended && !ts->disabled && input_device_enabled(ts->input))
__ad7879_disable(ts);
ts->suspended = true;
mutex_unlock(&ts->input->mutex);
return 0;
}
static int __maybe_unused ad7879_resume(struct device *dev)
{
struct ad7879 *ts = dev_get_drvdata(dev);
mutex_lock(&ts->input->mutex);
if (ts->suspended && !ts->disabled && input_device_enabled(ts->input))
__ad7879_enable(ts);
ts->suspended = false;
mutex_unlock(&ts->input->mutex);
return 0;
}
SIMPLE_DEV_PM_OPS(ad7879_pm_ops, ad7879_suspend, ad7879_resume);
EXPORT_SYMBOL(ad7879_pm_ops);
static void ad7879_toggle(struct ad7879 *ts, bool disable)
{
mutex_lock(&ts->input->mutex);
if (!ts->suspended && input_device_enabled(ts->input)) {
if (disable) {
if (ts->disabled)
__ad7879_enable(ts);
} else {
if (!ts->disabled)
__ad7879_disable(ts);
}
}
ts->disabled = disable;
mutex_unlock(&ts->input->mutex);
}
static ssize_t ad7879_disable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ad7879 *ts = dev_get_drvdata(dev);
return sprintf(buf, "%u\n", ts->disabled);
}
static ssize_t ad7879_disable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ad7879 *ts = dev_get_drvdata(dev);
unsigned int val;
int error;
error = kstrtouint(buf, 10, &val);
if (error)
return error;
ad7879_toggle(ts, val);
return count;
}
static DEVICE_ATTR(disable, 0664, ad7879_disable_show, ad7879_disable_store);
static struct attribute *ad7879_attributes[] = {
&dev_attr_disable.attr,
NULL
};
static const struct attribute_group ad7879_attr_group = {
.attrs = ad7879_attributes,
};
#ifdef CONFIG_GPIOLIB
static int ad7879_gpio_direction_input(struct gpio_chip *chip,
unsigned gpio)
{
struct ad7879 *ts = gpiochip_get_data(chip);
int err;
mutex_lock(&ts->mutex);
ts->cmd_crtl2 |= AD7879_GPIO_EN | AD7879_GPIODIR | AD7879_GPIOPOL;
err = ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2);
mutex_unlock(&ts->mutex);
return err;
}
static int ad7879_gpio_direction_output(struct gpio_chip *chip,
unsigned gpio, int level)
{
struct ad7879 *ts = gpiochip_get_data(chip);
int err;
mutex_lock(&ts->mutex);
ts->cmd_crtl2 &= ~AD7879_GPIODIR;
ts->cmd_crtl2 |= AD7879_GPIO_EN | AD7879_GPIOPOL;
if (level)
ts->cmd_crtl2 |= AD7879_GPIO_DATA;
else
ts->cmd_crtl2 &= ~AD7879_GPIO_DATA;
err = ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2);
mutex_unlock(&ts->mutex);
return err;
}
static int ad7879_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
{
struct ad7879 *ts = gpiochip_get_data(chip);
u16 val;
mutex_lock(&ts->mutex);
val = ad7879_read(ts, AD7879_REG_CTRL2);
mutex_unlock(&ts->mutex);
return !!(val & AD7879_GPIO_DATA);
}
static void ad7879_gpio_set_value(struct gpio_chip *chip,
unsigned gpio, int value)
{
struct ad7879 *ts = gpiochip_get_data(chip);
mutex_lock(&ts->mutex);
if (value)
ts->cmd_crtl2 |= AD7879_GPIO_DATA;
else
ts->cmd_crtl2 &= ~AD7879_GPIO_DATA;
ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2);
mutex_unlock(&ts->mutex);
}
static int ad7879_gpio_add(struct ad7879 *ts)
{
int ret = 0;
mutex_init(&ts->mutex);
/* Do not create a chip unless flagged for it */
if (!device_property_read_bool(ts->dev, "gpio-controller"))
return 0;
ts->gc.direction_input = ad7879_gpio_direction_input;
ts->gc.direction_output = ad7879_gpio_direction_output;
ts->gc.get = ad7879_gpio_get_value;
ts->gc.set = ad7879_gpio_set_value;
ts->gc.can_sleep = 1;
ts->gc.base = -1;
ts->gc.ngpio = 1;
ts->gc.label = "AD7879-GPIO";
ts->gc.owner = THIS_MODULE;
ts->gc.parent = ts->dev;
ret = devm_gpiochip_add_data(ts->dev, &ts->gc, ts);
if (ret)
dev_err(ts->dev, "failed to register gpio %d\n",
ts->gc.base);
return ret;
}
#else
static int ad7879_gpio_add(struct ad7879 *ts)
{
return 0;
}
#endif
static int ad7879_parse_dt(struct device *dev, struct ad7879 *ts)
{
int err;
u32 tmp;
err = device_property_read_u32(dev, "adi,resistance-plate-x", &tmp);
if (err) {
dev_err(dev, "failed to get resistance-plate-x property\n");
return err;
}
ts->x_plate_ohms = (u16)tmp;
device_property_read_u8(dev, "adi,first-conversion-delay",
&ts->first_conversion_delay);
device_property_read_u8(dev, "adi,acquisition-time",
&ts->acquisition_time);
device_property_read_u8(dev, "adi,median-filter-size", &ts->median);
device_property_read_u8(dev, "adi,averaging", &ts->averaging);
device_property_read_u8(dev, "adi,conversion-interval",
&ts->pen_down_acc_interval);
ts->swap_xy = device_property_read_bool(dev, "touchscreen-swapped-x-y");
return 0;
}
int ad7879_probe(struct device *dev, struct regmap *regmap,
int irq, u16 bustype, u8 devid)
{
struct ad7879 *ts;
struct input_dev *input_dev;
int err;
u16 revid;
if (irq <= 0) {
dev_err(dev, "No IRQ specified\n");
return -EINVAL;
}
ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
err = ad7879_parse_dt(dev, ts);
if (err)
return err;
input_dev = devm_input_allocate_device(dev);
if (!input_dev) {
dev_err(dev, "Failed to allocate input device\n");
return -ENOMEM;
}
ts->dev = dev;
ts->input = input_dev;
ts->irq = irq;
ts->regmap = regmap;
timer_setup(&ts->timer, ad7879_timer, 0);
snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev));
input_dev->name = "AD7879 Touchscreen";
input_dev->phys = ts->phys;
input_dev->dev.parent = dev;
input_dev->id.bustype = bustype;
input_dev->open = ad7879_open;
input_dev->close = ad7879_close;
input_set_drvdata(input_dev, ts);
input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
input_set_abs_params(input_dev, ABS_X, 0, MAX_12BIT, 0, 0);
input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, 0, 0);
input_set_capability(input_dev, EV_ABS, ABS_PRESSURE);
touchscreen_parse_properties(input_dev, false, NULL);
if (!input_abs_get_max(input_dev, ABS_PRESSURE)) {
dev_err(dev, "Touchscreen pressure is not specified\n");
return -EINVAL;
}
err = ad7879_write(ts, AD7879_REG_CTRL2, AD7879_RESET);
if (err < 0) {
dev_err(dev, "Failed to write %s\n", input_dev->name);
return err;
}
revid = ad7879_read(ts, AD7879_REG_REVID);
input_dev->id.product = (revid & 0xff);
input_dev->id.version = revid >> 8;
if (input_dev->id.product != devid) {
dev_err(dev, "Failed to probe %s (%x vs %x)\n",
input_dev->name, devid, revid);
return -ENODEV;
}
ts->cmd_crtl3 = AD7879_YPLUS_BIT |
AD7879_XPLUS_BIT |
AD7879_Z2_BIT |
AD7879_Z1_BIT |
AD7879_TEMPMASK_BIT |
AD7879_AUXVBATMASK_BIT |
AD7879_GPIOALERTMASK_BIT;
ts->cmd_crtl2 = AD7879_PM(AD7879_PM_DYN) | AD7879_DFR |
AD7879_AVG(ts->averaging) |
AD7879_MFS(ts->median) |
AD7879_FCD(ts->first_conversion_delay);
ts->cmd_crtl1 = AD7879_MODE_INT | AD7879_MODE_SEQ1 |
AD7879_ACQ(ts->acquisition_time) |
AD7879_TMR(ts->pen_down_acc_interval);
err = devm_request_threaded_irq(dev, ts->irq, NULL, ad7879_irq,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
dev_name(dev), ts);
if (err) {
dev_err(dev, "Failed to request IRQ: %d\n", err);
return err;
}
__ad7879_disable(ts);
err = devm_device_add_group(dev, &ad7879_attr_group);
if (err)
return err;
err = ad7879_gpio_add(ts);
if (err)
return err;
err = input_register_device(input_dev);
if (err)
return err;
dev_set_drvdata(dev, ts);
return 0;
}
EXPORT_SYMBOL(ad7879_probe);
MODULE_AUTHOR("Michael Hennerich <[email protected]>");
MODULE_DESCRIPTION("AD7879(-1) touchscreen Driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/ad7879.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for cypress touch screen controller
*
* Copyright (c) 2009 Aava Mobile
*
* Some cleanups by Alan Cox <[email protected]>
*/
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/gpio/consumer.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <asm/byteorder.h>
#define CY8CTMG110_DRIVER_NAME "cy8ctmg110"
/* Touch coordinates */
#define CY8CTMG110_X_MIN 0
#define CY8CTMG110_Y_MIN 0
#define CY8CTMG110_X_MAX 759
#define CY8CTMG110_Y_MAX 465
/* cy8ctmg110 register definitions */
#define CY8CTMG110_TOUCH_WAKEUP_TIME 0
#define CY8CTMG110_TOUCH_SLEEP_TIME 2
#define CY8CTMG110_TOUCH_X1 3
#define CY8CTMG110_TOUCH_Y1 5
#define CY8CTMG110_TOUCH_X2 7
#define CY8CTMG110_TOUCH_Y2 9
#define CY8CTMG110_FINGERS 11
#define CY8CTMG110_GESTURE 12
#define CY8CTMG110_REG_MAX 13
/*
* The touch driver structure.
*/
struct cy8ctmg110 {
struct input_dev *input;
char phys[32];
struct i2c_client *client;
struct gpio_desc *reset_gpio;
};
/*
* cy8ctmg110_power is the routine that is called when touch hardware
* is being powered off or on. When powering on this routine de-asserts
* the RESET line, when powering off reset line is asserted.
*/
static void cy8ctmg110_power(struct cy8ctmg110 *ts, bool poweron)
{
if (ts->reset_gpio)
gpiod_set_value_cansleep(ts->reset_gpio, !poweron);
}
static int cy8ctmg110_write_regs(struct cy8ctmg110 *tsc, unsigned char reg,
unsigned char len, unsigned char *value)
{
struct i2c_client *client = tsc->client;
int ret;
unsigned char i2c_data[6];
BUG_ON(len > 5);
i2c_data[0] = reg;
memcpy(i2c_data + 1, value, len);
ret = i2c_master_send(client, i2c_data, len + 1);
if (ret != len + 1) {
dev_err(&client->dev, "i2c write data cmd failed\n");
return ret < 0 ? ret : -EIO;
}
return 0;
}
static int cy8ctmg110_read_regs(struct cy8ctmg110 *tsc,
unsigned char *data, unsigned char len, unsigned char cmd)
{
struct i2c_client *client = tsc->client;
int ret;
struct i2c_msg msg[2] = {
/* first write slave position to i2c devices */
{
.addr = client->addr,
.len = 1,
.buf = &cmd
},
/* Second read data from position */
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = len,
.buf = data
}
};
ret = i2c_transfer(client->adapter, msg, 2);
if (ret < 0)
return ret;
return 0;
}
static int cy8ctmg110_touch_pos(struct cy8ctmg110 *tsc)
{
struct input_dev *input = tsc->input;
unsigned char reg_p[CY8CTMG110_REG_MAX];
memset(reg_p, 0, CY8CTMG110_REG_MAX);
/* Reading coordinates */
if (cy8ctmg110_read_regs(tsc, reg_p, 9, CY8CTMG110_TOUCH_X1) != 0)
return -EIO;
/* Number of touch */
if (reg_p[8] == 0) {
input_report_key(input, BTN_TOUCH, 0);
} else {
input_report_key(input, BTN_TOUCH, 1);
input_report_abs(input, ABS_X,
be16_to_cpup((__be16 *)(reg_p + 0)));
input_report_abs(input, ABS_Y,
be16_to_cpup((__be16 *)(reg_p + 2)));
}
input_sync(input);
return 0;
}
static int cy8ctmg110_set_sleepmode(struct cy8ctmg110 *ts, bool sleep)
{
unsigned char reg_p[3];
if (sleep) {
reg_p[0] = 0x00;
reg_p[1] = 0xff;
reg_p[2] = 5;
} else {
reg_p[0] = 0x10;
reg_p[1] = 0xff;
reg_p[2] = 0;
}
return cy8ctmg110_write_regs(ts, CY8CTMG110_TOUCH_WAKEUP_TIME, 3, reg_p);
}
static irqreturn_t cy8ctmg110_irq_thread(int irq, void *dev_id)
{
struct cy8ctmg110 *tsc = dev_id;
cy8ctmg110_touch_pos(tsc);
return IRQ_HANDLED;
}
static void cy8ctmg110_shut_off(void *_ts)
{
struct cy8ctmg110 *ts = _ts;
cy8ctmg110_set_sleepmode(ts, true);
cy8ctmg110_power(ts, false);
}
static int cy8ctmg110_probe(struct i2c_client *client)
{
struct cy8ctmg110 *ts;
struct input_dev *input_dev;
int err;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_READ_WORD_DATA))
return -EIO;
ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
input_dev = devm_input_allocate_device(&client->dev);
if (!input_dev)
return -ENOMEM;
ts->client = client;
ts->input = input_dev;
snprintf(ts->phys, sizeof(ts->phys),
"%s/input0", dev_name(&client->dev));
input_dev->name = CY8CTMG110_DRIVER_NAME " Touchscreen";
input_dev->phys = ts->phys;
input_dev->id.bustype = BUS_I2C;
input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
input_set_abs_params(input_dev, ABS_X,
CY8CTMG110_X_MIN, CY8CTMG110_X_MAX, 4, 0);
input_set_abs_params(input_dev, ABS_Y,
CY8CTMG110_Y_MIN, CY8CTMG110_Y_MAX, 4, 0);
/* Request and assert reset line */
ts->reset_gpio = devm_gpiod_get_optional(&client->dev, NULL,
GPIOD_OUT_HIGH);
if (IS_ERR(ts->reset_gpio)) {
err = PTR_ERR(ts->reset_gpio);
dev_err(&client->dev,
"Unable to request reset GPIO: %d\n", err);
return err;
}
cy8ctmg110_power(ts, true);
cy8ctmg110_set_sleepmode(ts, false);
err = devm_add_action_or_reset(&client->dev, cy8ctmg110_shut_off, ts);
if (err)
return err;
err = devm_request_threaded_irq(&client->dev, client->irq,
NULL, cy8ctmg110_irq_thread,
IRQF_ONESHOT, "touch_reset_key", ts);
if (err) {
dev_err(&client->dev,
"irq %d busy? error %d\n", client->irq, err);
return err;
}
err = input_register_device(input_dev);
if (err)
return err;
i2c_set_clientdata(client, ts);
return 0;
}
static int cy8ctmg110_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct cy8ctmg110 *ts = i2c_get_clientdata(client);
if (!device_may_wakeup(&client->dev)) {
cy8ctmg110_set_sleepmode(ts, true);
cy8ctmg110_power(ts, false);
}
return 0;
}
static int cy8ctmg110_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct cy8ctmg110 *ts = i2c_get_clientdata(client);
if (!device_may_wakeup(&client->dev)) {
cy8ctmg110_power(ts, true);
cy8ctmg110_set_sleepmode(ts, false);
}
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(cy8ctmg110_pm,
cy8ctmg110_suspend, cy8ctmg110_resume);
static const struct i2c_device_id cy8ctmg110_idtable[] = {
{ CY8CTMG110_DRIVER_NAME, 1 },
{ }
};
MODULE_DEVICE_TABLE(i2c, cy8ctmg110_idtable);
static struct i2c_driver cy8ctmg110_driver = {
.driver = {
.name = CY8CTMG110_DRIVER_NAME,
.pm = pm_sleep_ptr(&cy8ctmg110_pm),
},
.id_table = cy8ctmg110_idtable,
.probe = cy8ctmg110_probe,
};
module_i2c_driver(cy8ctmg110_driver);
MODULE_AUTHOR("Samuli Konttila <[email protected]>");
MODULE_DESCRIPTION("cy8ctmg110 TouchScreen Driver");
MODULE_LICENSE("GPL v2");
|
linux-master
|
drivers/input/touchscreen/cy8ctmg110_ts.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* LPC32xx built-in touchscreen driver
*
* Copyright (C) 2010 NXP Semiconductors
*/
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/of.h>
/*
* Touchscreen controller register offsets
*/
#define LPC32XX_TSC_STAT 0x00
#define LPC32XX_TSC_SEL 0x04
#define LPC32XX_TSC_CON 0x08
#define LPC32XX_TSC_FIFO 0x0C
#define LPC32XX_TSC_DTR 0x10
#define LPC32XX_TSC_RTR 0x14
#define LPC32XX_TSC_UTR 0x18
#define LPC32XX_TSC_TTR 0x1C
#define LPC32XX_TSC_DXP 0x20
#define LPC32XX_TSC_MIN_X 0x24
#define LPC32XX_TSC_MAX_X 0x28
#define LPC32XX_TSC_MIN_Y 0x2C
#define LPC32XX_TSC_MAX_Y 0x30
#define LPC32XX_TSC_AUX_UTR 0x34
#define LPC32XX_TSC_AUX_MIN 0x38
#define LPC32XX_TSC_AUX_MAX 0x3C
#define LPC32XX_TSC_STAT_FIFO_OVRRN BIT(8)
#define LPC32XX_TSC_STAT_FIFO_EMPTY BIT(7)
#define LPC32XX_TSC_SEL_DEFVAL 0x0284
#define LPC32XX_TSC_ADCCON_IRQ_TO_FIFO_4 (0x1 << 11)
#define LPC32XX_TSC_ADCCON_X_SAMPLE_SIZE(s) ((10 - (s)) << 7)
#define LPC32XX_TSC_ADCCON_Y_SAMPLE_SIZE(s) ((10 - (s)) << 4)
#define LPC32XX_TSC_ADCCON_POWER_UP BIT(2)
#define LPC32XX_TSC_ADCCON_AUTO_EN BIT(0)
#define LPC32XX_TSC_FIFO_TS_P_LEVEL BIT(31)
#define LPC32XX_TSC_FIFO_NORMALIZE_X_VAL(x) (((x) & 0x03FF0000) >> 16)
#define LPC32XX_TSC_FIFO_NORMALIZE_Y_VAL(y) ((y) & 0x000003FF)
#define LPC32XX_TSC_ADCDAT_VALUE_MASK 0x000003FF
#define LPC32XX_TSC_MIN_XY_VAL 0x0
#define LPC32XX_TSC_MAX_XY_VAL 0x3FF
#define MOD_NAME "ts-lpc32xx"
#define tsc_readl(dev, reg) \
__raw_readl((dev)->tsc_base + (reg))
#define tsc_writel(dev, reg, val) \
__raw_writel((val), (dev)->tsc_base + (reg))
struct lpc32xx_tsc {
struct input_dev *dev;
void __iomem *tsc_base;
int irq;
struct clk *clk;
};
static void lpc32xx_fifo_clear(struct lpc32xx_tsc *tsc)
{
while (!(tsc_readl(tsc, LPC32XX_TSC_STAT) &
LPC32XX_TSC_STAT_FIFO_EMPTY))
tsc_readl(tsc, LPC32XX_TSC_FIFO);
}
static irqreturn_t lpc32xx_ts_interrupt(int irq, void *dev_id)
{
u32 tmp, rv[4], xs[4], ys[4];
int idx;
struct lpc32xx_tsc *tsc = dev_id;
struct input_dev *input = tsc->dev;
tmp = tsc_readl(tsc, LPC32XX_TSC_STAT);
if (tmp & LPC32XX_TSC_STAT_FIFO_OVRRN) {
/* FIFO overflow - throw away samples */
lpc32xx_fifo_clear(tsc);
return IRQ_HANDLED;
}
/*
* Gather and normalize 4 samples. Pen-up events may have less
* than 4 samples, but its ok to pop 4 and let the last sample
* pen status check drop the samples.
*/
idx = 0;
while (idx < 4 &&
!(tsc_readl(tsc, LPC32XX_TSC_STAT) &
LPC32XX_TSC_STAT_FIFO_EMPTY)) {
tmp = tsc_readl(tsc, LPC32XX_TSC_FIFO);
xs[idx] = LPC32XX_TSC_ADCDAT_VALUE_MASK -
LPC32XX_TSC_FIFO_NORMALIZE_X_VAL(tmp);
ys[idx] = LPC32XX_TSC_ADCDAT_VALUE_MASK -
LPC32XX_TSC_FIFO_NORMALIZE_Y_VAL(tmp);
rv[idx] = tmp;
idx++;
}
/* Data is only valid if pen is still down in last sample */
if (!(rv[3] & LPC32XX_TSC_FIFO_TS_P_LEVEL) && idx == 4) {
/* Use average of 2nd and 3rd sample for position */
input_report_abs(input, ABS_X, (xs[1] + xs[2]) / 2);
input_report_abs(input, ABS_Y, (ys[1] + ys[2]) / 2);
input_report_key(input, BTN_TOUCH, 1);
} else {
input_report_key(input, BTN_TOUCH, 0);
}
input_sync(input);
return IRQ_HANDLED;
}
static void lpc32xx_stop_tsc(struct lpc32xx_tsc *tsc)
{
/* Disable auto mode */
tsc_writel(tsc, LPC32XX_TSC_CON,
tsc_readl(tsc, LPC32XX_TSC_CON) &
~LPC32XX_TSC_ADCCON_AUTO_EN);
clk_disable_unprepare(tsc->clk);
}
static int lpc32xx_setup_tsc(struct lpc32xx_tsc *tsc)
{
u32 tmp;
int err;
err = clk_prepare_enable(tsc->clk);
if (err)
return err;
tmp = tsc_readl(tsc, LPC32XX_TSC_CON) & ~LPC32XX_TSC_ADCCON_POWER_UP;
/* Set the TSC FIFO depth to 4 samples @ 10-bits per sample (max) */
tmp = LPC32XX_TSC_ADCCON_IRQ_TO_FIFO_4 |
LPC32XX_TSC_ADCCON_X_SAMPLE_SIZE(10) |
LPC32XX_TSC_ADCCON_Y_SAMPLE_SIZE(10);
tsc_writel(tsc, LPC32XX_TSC_CON, tmp);
/* These values are all preset */
tsc_writel(tsc, LPC32XX_TSC_SEL, LPC32XX_TSC_SEL_DEFVAL);
tsc_writel(tsc, LPC32XX_TSC_MIN_X, LPC32XX_TSC_MIN_XY_VAL);
tsc_writel(tsc, LPC32XX_TSC_MAX_X, LPC32XX_TSC_MAX_XY_VAL);
tsc_writel(tsc, LPC32XX_TSC_MIN_Y, LPC32XX_TSC_MIN_XY_VAL);
tsc_writel(tsc, LPC32XX_TSC_MAX_Y, LPC32XX_TSC_MAX_XY_VAL);
/* Aux support is not used */
tsc_writel(tsc, LPC32XX_TSC_AUX_UTR, 0);
tsc_writel(tsc, LPC32XX_TSC_AUX_MIN, 0);
tsc_writel(tsc, LPC32XX_TSC_AUX_MAX, 0);
/*
* Set sample rate to about 240Hz per X/Y pair. A single measurement
* consists of 4 pairs which gives about a 60Hz sample rate based on
* a stable 32768Hz clock source. Values are in clocks.
* Rate is (32768 / (RTR + XCONV + RTR + YCONV + DXP + TTR + UTR) / 4
*/
tsc_writel(tsc, LPC32XX_TSC_RTR, 0x2);
tsc_writel(tsc, LPC32XX_TSC_DTR, 0x2);
tsc_writel(tsc, LPC32XX_TSC_TTR, 0x10);
tsc_writel(tsc, LPC32XX_TSC_DXP, 0x4);
tsc_writel(tsc, LPC32XX_TSC_UTR, 88);
lpc32xx_fifo_clear(tsc);
/* Enable automatic ts event capture */
tsc_writel(tsc, LPC32XX_TSC_CON, tmp | LPC32XX_TSC_ADCCON_AUTO_EN);
return 0;
}
static int lpc32xx_ts_open(struct input_dev *dev)
{
struct lpc32xx_tsc *tsc = input_get_drvdata(dev);
return lpc32xx_setup_tsc(tsc);
}
static void lpc32xx_ts_close(struct input_dev *dev)
{
struct lpc32xx_tsc *tsc = input_get_drvdata(dev);
lpc32xx_stop_tsc(tsc);
}
static int lpc32xx_ts_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct lpc32xx_tsc *tsc;
struct input_dev *input;
int irq;
int error;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
tsc = devm_kzalloc(dev, sizeof(*tsc), GFP_KERNEL);
if (!tsc)
return -ENOMEM;
tsc->irq = irq;
tsc->tsc_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(tsc->tsc_base))
return PTR_ERR(tsc->tsc_base);
tsc->clk = devm_clk_get(dev, NULL);
if (IS_ERR(tsc->clk)) {
dev_err(&pdev->dev, "failed getting clock\n");
return PTR_ERR(tsc->clk);
}
input = devm_input_allocate_device(dev);
if (!input) {
dev_err(&pdev->dev, "failed allocating input device\n");
return -ENOMEM;
}
input->name = MOD_NAME;
input->phys = "lpc32xx/input0";
input->id.bustype = BUS_HOST;
input->id.vendor = 0x0001;
input->id.product = 0x0002;
input->id.version = 0x0100;
input->open = lpc32xx_ts_open;
input->close = lpc32xx_ts_close;
input_set_capability(input, EV_KEY, BTN_TOUCH);
input_set_abs_params(input, ABS_X, LPC32XX_TSC_MIN_XY_VAL,
LPC32XX_TSC_MAX_XY_VAL, 0, 0);
input_set_abs_params(input, ABS_Y, LPC32XX_TSC_MIN_XY_VAL,
LPC32XX_TSC_MAX_XY_VAL, 0, 0);
input_set_drvdata(input, tsc);
tsc->dev = input;
error = devm_request_irq(dev, tsc->irq, lpc32xx_ts_interrupt,
0, pdev->name, tsc);
if (error) {
dev_err(&pdev->dev, "failed requesting interrupt\n");
return error;
}
error = input_register_device(input);
if (error) {
dev_err(&pdev->dev, "failed registering input device\n");
return error;
}
platform_set_drvdata(pdev, tsc);
device_init_wakeup(&pdev->dev, true);
return 0;
}
#ifdef CONFIG_PM
static int lpc32xx_ts_suspend(struct device *dev)
{
struct lpc32xx_tsc *tsc = dev_get_drvdata(dev);
struct input_dev *input = tsc->dev;
/*
* Suspend and resume can be called when the device hasn't been
* enabled. If there are no users that have the device open, then
* avoid calling the TSC stop and start functions as the TSC
* isn't yet clocked.
*/
mutex_lock(&input->mutex);
if (input_device_enabled(input)) {
if (device_may_wakeup(dev))
enable_irq_wake(tsc->irq);
else
lpc32xx_stop_tsc(tsc);
}
mutex_unlock(&input->mutex);
return 0;
}
static int lpc32xx_ts_resume(struct device *dev)
{
struct lpc32xx_tsc *tsc = dev_get_drvdata(dev);
struct input_dev *input = tsc->dev;
mutex_lock(&input->mutex);
if (input_device_enabled(input)) {
if (device_may_wakeup(dev))
disable_irq_wake(tsc->irq);
else
lpc32xx_setup_tsc(tsc);
}
mutex_unlock(&input->mutex);
return 0;
}
static const struct dev_pm_ops lpc32xx_ts_pm_ops = {
.suspend = lpc32xx_ts_suspend,
.resume = lpc32xx_ts_resume,
};
#define LPC32XX_TS_PM_OPS (&lpc32xx_ts_pm_ops)
#else
#define LPC32XX_TS_PM_OPS NULL
#endif
#ifdef CONFIG_OF
static const struct of_device_id lpc32xx_tsc_of_match[] = {
{ .compatible = "nxp,lpc3220-tsc", },
{ },
};
MODULE_DEVICE_TABLE(of, lpc32xx_tsc_of_match);
#endif
static struct platform_driver lpc32xx_ts_driver = {
.probe = lpc32xx_ts_probe,
.driver = {
.name = MOD_NAME,
.pm = LPC32XX_TS_PM_OPS,
.of_match_table = of_match_ptr(lpc32xx_tsc_of_match),
},
};
module_platform_driver(lpc32xx_ts_driver);
MODULE_AUTHOR("Kevin Wells <[email protected]");
MODULE_DESCRIPTION("LPC32XX TSC Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:lpc32xx_ts");
|
linux-master
|
drivers/input/touchscreen/lpc32xx_ts.c
|
// SPDX-License-Identifier: GPL-2.0
// Samsung S6SY761 Touchscreen device driver
//
// Copyright (c) 2017 Samsung Electronics Co., Ltd.
// Copyright (c) 2017 Andi Shyti <[email protected]>
#include <asm/unaligned.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
/* commands */
#define S6SY761_SENSE_ON 0x10
#define S6SY761_SENSE_OFF 0x11
#define S6SY761_TOUCH_FUNCTION 0x30 /* R/W for get/set */
#define S6SY761_FIRMWARE_INTEGRITY 0x21
#define S6SY761_PANEL_INFO 0x23
#define S6SY761_DEVICE_ID 0x52
#define S6SY761_BOOT_STATUS 0x55
#define S6SY761_READ_ONE_EVENT 0x60
#define S6SY761_READ_ALL_EVENT 0x61
#define S6SY761_CLEAR_EVENT_STACK 0x62
#define S6SY761_APPLICATION_MODE 0xe4
/* events */
#define S6SY761_EVENT_INFO 0x02
#define S6SY761_EVENT_VENDOR_INFO 0x07
/* info */
#define S6SY761_INFO_BOOT_COMPLETE 0x00
/* firmware status */
#define S6SY761_FW_OK 0x80
/*
* the functionalities are put as a reference
* as in the device I am using none of them
* works therefore not used in this driver yet.
*/
/* touchscreen functionalities */
#define S6SY761_MASK_TOUCH BIT(0)
#define S6SY761_MASK_HOVER BIT(1)
#define S6SY761_MASK_COVER BIT(2)
#define S6SY761_MASK_GLOVE BIT(3)
#define S6SY761_MASK_STYLUS BIT(4)
#define S6SY761_MASK_PALM BIT(5)
#define S6SY761_MASK_WET BIT(6)
#define S6SY761_MASK_PROXIMITY BIT(7)
/* boot status (BS) */
#define S6SY761_BS_BOOT_LOADER 0x10
#define S6SY761_BS_APPLICATION 0x20
/* event id */
#define S6SY761_EVENT_ID_COORDINATE 0x00
#define S6SY761_EVENT_ID_STATUS 0x01
/* event register masks */
#define S6SY761_MASK_TOUCH_STATE 0xc0 /* byte 0 */
#define S6SY761_MASK_TID 0x3c
#define S6SY761_MASK_EID 0x03
#define S6SY761_MASK_X 0xf0 /* byte 3 */
#define S6SY761_MASK_Y 0x0f
#define S6SY761_MASK_Z 0x3f /* byte 6 */
#define S6SY761_MASK_LEFT_EVENTS 0x3f /* byte 7 */
#define S6SY761_MASK_TOUCH_TYPE 0xc0 /* MSB in byte 6, LSB in byte 7 */
/* event touch state values */
#define S6SY761_TS_NONE 0x00
#define S6SY761_TS_PRESS 0x01
#define S6SY761_TS_MOVE 0x02
#define S6SY761_TS_RELEASE 0x03
/* application modes */
#define S6SY761_APP_NORMAL 0x0
#define S6SY761_APP_LOW_POWER 0x1
#define S6SY761_APP_TEST 0x2
#define S6SY761_APP_FLASH 0x3
#define S6SY761_APP_SLEEP 0x4
#define S6SY761_EVENT_SIZE 8
#define S6SY761_EVENT_COUNT 32
#define S6SY761_DEVID_SIZE 3
#define S6SY761_PANEL_ID_SIZE 11
#define S6SY761_TS_STATUS_SIZE 5
#define S6SY761_MAX_FINGERS 10
#define S6SY761_DEV_NAME "s6sy761"
enum s6sy761_regulators {
S6SY761_REGULATOR_VDD,
S6SY761_REGULATOR_AVDD,
};
struct s6sy761_data {
struct i2c_client *client;
struct regulator_bulk_data regulators[2];
struct input_dev *input;
struct touchscreen_properties prop;
u8 data[S6SY761_EVENT_SIZE * S6SY761_EVENT_COUNT];
u16 devid;
u8 tx_channel;
};
/*
* We can't simply use i2c_smbus_read_i2c_block_data because we
* need to read more than 255 bytes
*/
static int s6sy761_read_events(struct s6sy761_data *sdata, u16 n_events)
{
u8 cmd = S6SY761_READ_ALL_EVENT;
struct i2c_msg msgs[2] = {
{
.addr = sdata->client->addr,
.len = 1,
.buf = &cmd,
},
{
.addr = sdata->client->addr,
.flags = I2C_M_RD,
.len = (n_events * S6SY761_EVENT_SIZE),
.buf = sdata->data + S6SY761_EVENT_SIZE,
},
};
int ret;
ret = i2c_transfer(sdata->client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret < 0)
return ret;
return ret == ARRAY_SIZE(msgs) ? 0 : -EIO;
}
static void s6sy761_report_coordinates(struct s6sy761_data *sdata,
u8 *event, u8 tid)
{
u8 major = event[4];
u8 minor = event[5];
u8 z = event[6] & S6SY761_MASK_Z;
u16 x = (event[1] << 4) | ((event[3] & S6SY761_MASK_X) >> 4);
u16 y = (event[2] << 4) | (event[3] & S6SY761_MASK_Y);
input_mt_slot(sdata->input, tid);
input_mt_report_slot_state(sdata->input, MT_TOOL_FINGER, true);
input_report_abs(sdata->input, ABS_MT_POSITION_X, x);
input_report_abs(sdata->input, ABS_MT_POSITION_Y, y);
input_report_abs(sdata->input, ABS_MT_TOUCH_MAJOR, major);
input_report_abs(sdata->input, ABS_MT_TOUCH_MINOR, minor);
input_report_abs(sdata->input, ABS_MT_PRESSURE, z);
input_sync(sdata->input);
}
static void s6sy761_report_release(struct s6sy761_data *sdata,
u8 *event, u8 tid)
{
input_mt_slot(sdata->input, tid);
input_mt_report_slot_state(sdata->input, MT_TOOL_FINGER, false);
input_sync(sdata->input);
}
static void s6sy761_handle_coordinates(struct s6sy761_data *sdata, u8 *event)
{
u8 tid;
u8 touch_state;
if (unlikely(!(event[0] & S6SY761_MASK_TID)))
return;
tid = ((event[0] & S6SY761_MASK_TID) >> 2) - 1;
touch_state = (event[0] & S6SY761_MASK_TOUCH_STATE) >> 6;
switch (touch_state) {
case S6SY761_TS_NONE:
break;
case S6SY761_TS_RELEASE:
s6sy761_report_release(sdata, event, tid);
break;
case S6SY761_TS_PRESS:
case S6SY761_TS_MOVE:
s6sy761_report_coordinates(sdata, event, tid);
break;
}
}
static void s6sy761_handle_events(struct s6sy761_data *sdata, u8 n_events)
{
int i;
for (i = 0; i < n_events; i++) {
u8 *event = &sdata->data[i * S6SY761_EVENT_SIZE];
u8 event_id = event[0] & S6SY761_MASK_EID;
if (!event[0])
return;
switch (event_id) {
case S6SY761_EVENT_ID_COORDINATE:
s6sy761_handle_coordinates(sdata, event);
break;
case S6SY761_EVENT_ID_STATUS:
break;
default:
break;
}
}
}
static irqreturn_t s6sy761_irq_handler(int irq, void *dev)
{
struct s6sy761_data *sdata = dev;
int ret;
u8 n_events;
ret = i2c_smbus_read_i2c_block_data(sdata->client,
S6SY761_READ_ONE_EVENT,
S6SY761_EVENT_SIZE,
sdata->data);
if (ret < 0) {
dev_err(&sdata->client->dev, "failed to read events\n");
return IRQ_HANDLED;
}
if (!sdata->data[0])
return IRQ_HANDLED;
n_events = sdata->data[7] & S6SY761_MASK_LEFT_EVENTS;
if (unlikely(n_events > S6SY761_EVENT_COUNT - 1))
return IRQ_HANDLED;
if (n_events) {
ret = s6sy761_read_events(sdata, n_events);
if (ret < 0) {
dev_err(&sdata->client->dev, "failed to read events\n");
return IRQ_HANDLED;
}
}
s6sy761_handle_events(sdata, n_events + 1);
return IRQ_HANDLED;
}
static int s6sy761_input_open(struct input_dev *dev)
{
struct s6sy761_data *sdata = input_get_drvdata(dev);
return i2c_smbus_write_byte(sdata->client, S6SY761_SENSE_ON);
}
static void s6sy761_input_close(struct input_dev *dev)
{
struct s6sy761_data *sdata = input_get_drvdata(dev);
int ret;
ret = i2c_smbus_write_byte(sdata->client, S6SY761_SENSE_OFF);
if (ret)
dev_err(&sdata->client->dev, "failed to turn off sensing\n");
}
static ssize_t s6sy761_sysfs_devid(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct s6sy761_data *sdata = dev_get_drvdata(dev);
return sprintf(buf, "%#x\n", sdata->devid);
}
static DEVICE_ATTR(devid, 0444, s6sy761_sysfs_devid, NULL);
static struct attribute *s6sy761_sysfs_attrs[] = {
&dev_attr_devid.attr,
NULL
};
static struct attribute_group s6sy761_attribute_group = {
.attrs = s6sy761_sysfs_attrs
};
static int s6sy761_power_on(struct s6sy761_data *sdata)
{
u8 buffer[S6SY761_EVENT_SIZE];
u8 event;
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(sdata->regulators),
sdata->regulators);
if (ret)
return ret;
msleep(140);
/* double check whether the touch is functional */
ret = i2c_smbus_read_i2c_block_data(sdata->client,
S6SY761_READ_ONE_EVENT,
S6SY761_EVENT_SIZE,
buffer);
if (ret < 0)
return ret;
event = (buffer[0] >> 2) & 0xf;
if ((event != S6SY761_EVENT_INFO &&
event != S6SY761_EVENT_VENDOR_INFO) ||
buffer[1] != S6SY761_INFO_BOOT_COMPLETE) {
return -ENODEV;
}
ret = i2c_smbus_read_byte_data(sdata->client, S6SY761_BOOT_STATUS);
if (ret < 0)
return ret;
/* for some reasons the device might be stuck in the bootloader */
if (ret != S6SY761_BS_APPLICATION)
return -ENODEV;
/* enable touch functionality */
ret = i2c_smbus_write_word_data(sdata->client,
S6SY761_TOUCH_FUNCTION,
S6SY761_MASK_TOUCH);
if (ret)
return ret;
return 0;
}
static int s6sy761_hw_init(struct s6sy761_data *sdata,
unsigned int *max_x, unsigned int *max_y)
{
u8 buffer[S6SY761_PANEL_ID_SIZE]; /* larger read size */
int ret;
ret = s6sy761_power_on(sdata);
if (ret)
return ret;
ret = i2c_smbus_read_i2c_block_data(sdata->client,
S6SY761_DEVICE_ID,
S6SY761_DEVID_SIZE,
buffer);
if (ret < 0)
return ret;
sdata->devid = get_unaligned_be16(buffer + 1);
ret = i2c_smbus_read_i2c_block_data(sdata->client,
S6SY761_PANEL_INFO,
S6SY761_PANEL_ID_SIZE,
buffer);
if (ret < 0)
return ret;
*max_x = get_unaligned_be16(buffer);
*max_y = get_unaligned_be16(buffer + 2);
/* if no tx channels defined, at least keep one */
sdata->tx_channel = max_t(u8, buffer[8], 1);
ret = i2c_smbus_read_byte_data(sdata->client,
S6SY761_FIRMWARE_INTEGRITY);
if (ret < 0)
return ret;
else if (ret != S6SY761_FW_OK)
return -ENODEV;
return 0;
}
static void s6sy761_power_off(void *data)
{
struct s6sy761_data *sdata = data;
disable_irq(sdata->client->irq);
regulator_bulk_disable(ARRAY_SIZE(sdata->regulators),
sdata->regulators);
}
static int s6sy761_probe(struct i2c_client *client)
{
struct s6sy761_data *sdata;
unsigned int max_x, max_y;
int err;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C |
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_I2C_BLOCK))
return -ENODEV;
sdata = devm_kzalloc(&client->dev, sizeof(*sdata), GFP_KERNEL);
if (!sdata)
return -ENOMEM;
i2c_set_clientdata(client, sdata);
sdata->client = client;
sdata->regulators[S6SY761_REGULATOR_VDD].supply = "vdd";
sdata->regulators[S6SY761_REGULATOR_AVDD].supply = "avdd";
err = devm_regulator_bulk_get(&client->dev,
ARRAY_SIZE(sdata->regulators),
sdata->regulators);
if (err)
return err;
err = devm_add_action_or_reset(&client->dev, s6sy761_power_off, sdata);
if (err)
return err;
err = s6sy761_hw_init(sdata, &max_x, &max_y);
if (err)
return err;
sdata->input = devm_input_allocate_device(&client->dev);
if (!sdata->input)
return -ENOMEM;
sdata->input->name = S6SY761_DEV_NAME;
sdata->input->id.bustype = BUS_I2C;
sdata->input->open = s6sy761_input_open;
sdata->input->close = s6sy761_input_close;
input_set_abs_params(sdata->input, ABS_MT_POSITION_X, 0, max_x, 0, 0);
input_set_abs_params(sdata->input, ABS_MT_POSITION_Y, 0, max_y, 0, 0);
input_set_abs_params(sdata->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
input_set_abs_params(sdata->input, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0);
input_set_abs_params(sdata->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
input_set_abs_params(sdata->input, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0);
input_set_abs_params(sdata->input, ABS_MT_PRESSURE, 0, 255, 0, 0);
touchscreen_parse_properties(sdata->input, true, &sdata->prop);
if (!input_abs_get_max(sdata->input, ABS_X) ||
!input_abs_get_max(sdata->input, ABS_Y)) {
dev_warn(&client->dev, "the axis have not been set\n");
}
err = input_mt_init_slots(sdata->input, sdata->tx_channel,
INPUT_MT_DIRECT);
if (err)
return err;
input_set_drvdata(sdata->input, sdata);
err = input_register_device(sdata->input);
if (err)
return err;
err = devm_request_threaded_irq(&client->dev, client->irq, NULL,
s6sy761_irq_handler,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"s6sy761_irq", sdata);
if (err)
return err;
err = devm_device_add_group(&client->dev, &s6sy761_attribute_group);
if (err)
return err;
pm_runtime_enable(&client->dev);
return 0;
}
static void s6sy761_remove(struct i2c_client *client)
{
pm_runtime_disable(&client->dev);
}
static int s6sy761_runtime_suspend(struct device *dev)
{
struct s6sy761_data *sdata = dev_get_drvdata(dev);
return i2c_smbus_write_byte_data(sdata->client,
S6SY761_APPLICATION_MODE, S6SY761_APP_SLEEP);
}
static int s6sy761_runtime_resume(struct device *dev)
{
struct s6sy761_data *sdata = dev_get_drvdata(dev);
return i2c_smbus_write_byte_data(sdata->client,
S6SY761_APPLICATION_MODE, S6SY761_APP_NORMAL);
}
static int s6sy761_suspend(struct device *dev)
{
struct s6sy761_data *sdata = dev_get_drvdata(dev);
s6sy761_power_off(sdata);
return 0;
}
static int s6sy761_resume(struct device *dev)
{
struct s6sy761_data *sdata = dev_get_drvdata(dev);
enable_irq(sdata->client->irq);
return s6sy761_power_on(sdata);
}
static const struct dev_pm_ops s6sy761_pm_ops = {
SYSTEM_SLEEP_PM_OPS(s6sy761_suspend, s6sy761_resume)
RUNTIME_PM_OPS(s6sy761_runtime_suspend, s6sy761_runtime_resume, NULL)
};
#ifdef CONFIG_OF
static const struct of_device_id s6sy761_of_match[] = {
{ .compatible = "samsung,s6sy761", },
{ },
};
MODULE_DEVICE_TABLE(of, s6sy761_of_match);
#endif
static const struct i2c_device_id s6sy761_id[] = {
{ "s6sy761", 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, s6sy761_id);
static struct i2c_driver s6sy761_driver = {
.driver = {
.name = S6SY761_DEV_NAME,
.of_match_table = of_match_ptr(s6sy761_of_match),
.pm = pm_ptr(&s6sy761_pm_ops),
},
.probe = s6sy761_probe,
.remove = s6sy761_remove,
.id_table = s6sy761_id,
};
module_i2c_driver(s6sy761_driver);
MODULE_AUTHOR("Andi Shyti <[email protected]>");
MODULE_DESCRIPTION("Samsung S6SY761 Touch Screen");
MODULE_LICENSE("GPL v2");
|
linux-master
|
drivers/input/touchscreen/s6sy761.c
|
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/crc-ccitt.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/ihex.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/sizes.h>
#include <linux/slab.h>
#include <asm/unaligned.h>
#define ILI2XXX_POLL_PERIOD 15
#define ILI210X_DATA_SIZE 64
#define ILI211X_DATA_SIZE 43
#define ILI251X_DATA_SIZE1 31
#define ILI251X_DATA_SIZE2 20
/* Touchscreen commands */
#define REG_TOUCHDATA 0x10
#define REG_PANEL_INFO 0x20
#define REG_FIRMWARE_VERSION 0x40
#define REG_PROTOCOL_VERSION 0x42
#define REG_KERNEL_VERSION 0x61
#define REG_IC_BUSY 0x80
#define REG_IC_BUSY_NOT_BUSY 0x50
#define REG_GET_MODE 0xc0
#define REG_GET_MODE_AP 0x5a
#define REG_GET_MODE_BL 0x55
#define REG_SET_MODE_AP 0xc1
#define REG_SET_MODE_BL 0xc2
#define REG_WRITE_DATA 0xc3
#define REG_WRITE_ENABLE 0xc4
#define REG_READ_DATA_CRC 0xc7
#define REG_CALIBRATE 0xcc
#define ILI251X_FW_FILENAME "ilitek/ili251x.bin"
struct ili2xxx_chip {
int (*read_reg)(struct i2c_client *client, u8 reg,
void *buf, size_t len);
int (*get_touch_data)(struct i2c_client *client, u8 *data);
bool (*parse_touch_data)(const u8 *data, unsigned int finger,
unsigned int *x, unsigned int *y,
unsigned int *z);
bool (*continue_polling)(const u8 *data, bool touch);
unsigned int max_touches;
unsigned int resolution;
bool has_calibrate_reg;
bool has_firmware_proto;
bool has_pressure_reg;
};
struct ili210x {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *reset_gpio;
struct touchscreen_properties prop;
const struct ili2xxx_chip *chip;
u8 version_firmware[8];
u8 version_kernel[5];
u8 version_proto[2];
u8 ic_mode[2];
bool stop;
};
static int ili210x_read_reg(struct i2c_client *client,
u8 reg, void *buf, size_t len)
{
struct i2c_msg msg[] = {
{
.addr = client->addr,
.flags = 0,
.len = 1,
.buf = ®,
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = len,
.buf = buf,
}
};
int error, ret;
ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
if (ret != ARRAY_SIZE(msg)) {
error = ret < 0 ? ret : -EIO;
dev_err(&client->dev, "%s failed: %d\n", __func__, error);
return error;
}
return 0;
}
static int ili210x_read_touch_data(struct i2c_client *client, u8 *data)
{
return ili210x_read_reg(client, REG_TOUCHDATA,
data, ILI210X_DATA_SIZE);
}
static bool ili210x_touchdata_to_coords(const u8 *touchdata,
unsigned int finger,
unsigned int *x, unsigned int *y,
unsigned int *z)
{
if (!(touchdata[0] & BIT(finger)))
return false;
*x = get_unaligned_be16(touchdata + 1 + (finger * 4) + 0);
*y = get_unaligned_be16(touchdata + 1 + (finger * 4) + 2);
return true;
}
static bool ili210x_check_continue_polling(const u8 *data, bool touch)
{
return data[0] & 0xf3;
}
static const struct ili2xxx_chip ili210x_chip = {
.read_reg = ili210x_read_reg,
.get_touch_data = ili210x_read_touch_data,
.parse_touch_data = ili210x_touchdata_to_coords,
.continue_polling = ili210x_check_continue_polling,
.max_touches = 2,
.has_calibrate_reg = true,
};
static int ili211x_read_touch_data(struct i2c_client *client, u8 *data)
{
s16 sum = 0;
int error;
int ret;
int i;
ret = i2c_master_recv(client, data, ILI211X_DATA_SIZE);
if (ret != ILI211X_DATA_SIZE) {
error = ret < 0 ? ret : -EIO;
dev_err(&client->dev, "%s failed: %d\n", __func__, error);
return error;
}
/* This chip uses custom checksum at the end of data */
for (i = 0; i < ILI211X_DATA_SIZE - 1; i++)
sum = (sum + data[i]) & 0xff;
if ((-sum & 0xff) != data[ILI211X_DATA_SIZE - 1]) {
dev_err(&client->dev,
"CRC error (crc=0x%02x expected=0x%02x)\n",
sum, data[ILI211X_DATA_SIZE - 1]);
return -EIO;
}
return 0;
}
static bool ili211x_touchdata_to_coords(const u8 *touchdata,
unsigned int finger,
unsigned int *x, unsigned int *y,
unsigned int *z)
{
u32 data;
data = get_unaligned_be32(touchdata + 1 + (finger * 4) + 0);
if (data == 0xffffffff) /* Finger up */
return false;
*x = ((touchdata[1 + (finger * 4) + 0] & 0xf0) << 4) |
touchdata[1 + (finger * 4) + 1];
*y = ((touchdata[1 + (finger * 4) + 0] & 0x0f) << 8) |
touchdata[1 + (finger * 4) + 2];
return true;
}
static bool ili211x_decline_polling(const u8 *data, bool touch)
{
return false;
}
static const struct ili2xxx_chip ili211x_chip = {
.read_reg = ili210x_read_reg,
.get_touch_data = ili211x_read_touch_data,
.parse_touch_data = ili211x_touchdata_to_coords,
.continue_polling = ili211x_decline_polling,
.max_touches = 10,
.resolution = 2048,
};
static bool ili212x_touchdata_to_coords(const u8 *touchdata,
unsigned int finger,
unsigned int *x, unsigned int *y,
unsigned int *z)
{
u16 val;
val = get_unaligned_be16(touchdata + 3 + (finger * 5) + 0);
if (!(val & BIT(15))) /* Touch indication */
return false;
*x = val & 0x3fff;
*y = get_unaligned_be16(touchdata + 3 + (finger * 5) + 2);
return true;
}
static bool ili212x_check_continue_polling(const u8 *data, bool touch)
{
return touch;
}
static const struct ili2xxx_chip ili212x_chip = {
.read_reg = ili210x_read_reg,
.get_touch_data = ili210x_read_touch_data,
.parse_touch_data = ili212x_touchdata_to_coords,
.continue_polling = ili212x_check_continue_polling,
.max_touches = 10,
.has_calibrate_reg = true,
};
static int ili251x_read_reg_common(struct i2c_client *client,
u8 reg, void *buf, size_t len,
unsigned int delay)
{
int error;
int ret;
ret = i2c_master_send(client, ®, 1);
if (ret == 1) {
if (delay)
usleep_range(delay, delay + 500);
ret = i2c_master_recv(client, buf, len);
if (ret == len)
return 0;
}
error = ret < 0 ? ret : -EIO;
dev_err(&client->dev, "%s failed: %d\n", __func__, error);
return ret;
}
static int ili251x_read_reg(struct i2c_client *client,
u8 reg, void *buf, size_t len)
{
return ili251x_read_reg_common(client, reg, buf, len, 5000);
}
static int ili251x_read_touch_data(struct i2c_client *client, u8 *data)
{
int error;
error = ili251x_read_reg_common(client, REG_TOUCHDATA,
data, ILI251X_DATA_SIZE1, 0);
if (!error && data[0] == 2) {
error = i2c_master_recv(client, data + ILI251X_DATA_SIZE1,
ILI251X_DATA_SIZE2);
if (error >= 0 && error != ILI251X_DATA_SIZE2)
error = -EIO;
}
return error;
}
static bool ili251x_touchdata_to_coords(const u8 *touchdata,
unsigned int finger,
unsigned int *x, unsigned int *y,
unsigned int *z)
{
u16 val;
val = get_unaligned_be16(touchdata + 1 + (finger * 5) + 0);
if (!(val & BIT(15))) /* Touch indication */
return false;
*x = val & 0x3fff;
*y = get_unaligned_be16(touchdata + 1 + (finger * 5) + 2);
*z = touchdata[1 + (finger * 5) + 4];
return true;
}
static bool ili251x_check_continue_polling(const u8 *data, bool touch)
{
return touch;
}
static const struct ili2xxx_chip ili251x_chip = {
.read_reg = ili251x_read_reg,
.get_touch_data = ili251x_read_touch_data,
.parse_touch_data = ili251x_touchdata_to_coords,
.continue_polling = ili251x_check_continue_polling,
.max_touches = 10,
.has_calibrate_reg = true,
.has_firmware_proto = true,
.has_pressure_reg = true,
};
static bool ili210x_report_events(struct ili210x *priv, u8 *touchdata)
{
struct input_dev *input = priv->input;
int i;
bool contact = false, touch;
unsigned int x = 0, y = 0, z = 0;
for (i = 0; i < priv->chip->max_touches; i++) {
touch = priv->chip->parse_touch_data(touchdata, i, &x, &y, &z);
input_mt_slot(input, i);
if (input_mt_report_slot_state(input, MT_TOOL_FINGER, touch)) {
touchscreen_report_pos(input, &priv->prop, x, y, true);
if (priv->chip->has_pressure_reg)
input_report_abs(input, ABS_MT_PRESSURE, z);
contact = true;
}
}
input_mt_report_pointer_emulation(input, false);
input_sync(input);
return contact;
}
static irqreturn_t ili210x_irq(int irq, void *irq_data)
{
struct ili210x *priv = irq_data;
struct i2c_client *client = priv->client;
const struct ili2xxx_chip *chip = priv->chip;
u8 touchdata[ILI210X_DATA_SIZE] = { 0 };
bool keep_polling;
ktime_t time_next;
s64 time_delta;
bool touch;
int error;
do {
time_next = ktime_add_ms(ktime_get(), ILI2XXX_POLL_PERIOD);
error = chip->get_touch_data(client, touchdata);
if (error) {
dev_err(&client->dev,
"Unable to get touch data: %d\n", error);
break;
}
touch = ili210x_report_events(priv, touchdata);
keep_polling = chip->continue_polling(touchdata, touch);
if (keep_polling) {
time_delta = ktime_us_delta(time_next, ktime_get());
if (time_delta > 0)
usleep_range(time_delta, time_delta + 1000);
}
} while (!priv->stop && keep_polling);
return IRQ_HANDLED;
}
static int ili251x_firmware_update_resolution(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ili210x *priv = i2c_get_clientdata(client);
u16 resx, resy;
u8 rs[10];
int error;
/* The firmware update blob might have changed the resolution. */
error = priv->chip->read_reg(client, REG_PANEL_INFO, &rs, sizeof(rs));
if (!error) {
resx = le16_to_cpup((__le16 *)rs);
resy = le16_to_cpup((__le16 *)(rs + 2));
/* The value reported by the firmware is invalid. */
if (!resx || resx == 0xffff || !resy || resy == 0xffff)
error = -EINVAL;
}
/*
* In case of error, the firmware might be stuck in bootloader mode,
* e.g. after a failed firmware update. Set maximum resolution, but
* do not fail to probe, so the user can re-trigger the firmware
* update and recover the touch controller.
*/
if (error) {
dev_warn(dev, "Invalid resolution reported by controller.\n");
resx = 16384;
resy = 16384;
}
input_abs_set_max(priv->input, ABS_X, resx - 1);
input_abs_set_max(priv->input, ABS_Y, resy - 1);
input_abs_set_max(priv->input, ABS_MT_POSITION_X, resx - 1);
input_abs_set_max(priv->input, ABS_MT_POSITION_Y, resy - 1);
return error;
}
static ssize_t ili251x_firmware_update_firmware_version(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ili210x *priv = i2c_get_clientdata(client);
int error;
u8 fw[8];
/* Get firmware version */
error = priv->chip->read_reg(client, REG_FIRMWARE_VERSION,
&fw, sizeof(fw));
if (!error)
memcpy(priv->version_firmware, fw, sizeof(fw));
return error;
}
static ssize_t ili251x_firmware_update_kernel_version(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ili210x *priv = i2c_get_clientdata(client);
int error;
u8 kv[5];
/* Get kernel version */
error = priv->chip->read_reg(client, REG_KERNEL_VERSION,
&kv, sizeof(kv));
if (!error)
memcpy(priv->version_kernel, kv, sizeof(kv));
return error;
}
static ssize_t ili251x_firmware_update_protocol_version(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ili210x *priv = i2c_get_clientdata(client);
int error;
u8 pv[2];
/* Get protocol version */
error = priv->chip->read_reg(client, REG_PROTOCOL_VERSION,
&pv, sizeof(pv));
if (!error)
memcpy(priv->version_proto, pv, sizeof(pv));
return error;
}
static ssize_t ili251x_firmware_update_ic_mode(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ili210x *priv = i2c_get_clientdata(client);
int error;
u8 md[2];
/* Get chip boot mode */
error = priv->chip->read_reg(client, REG_GET_MODE, &md, sizeof(md));
if (!error)
memcpy(priv->ic_mode, md, sizeof(md));
return error;
}
static int ili251x_firmware_update_cached_state(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ili210x *priv = i2c_get_clientdata(client);
int error;
if (!priv->chip->has_firmware_proto)
return 0;
/* Wait for firmware to boot and stabilize itself. */
msleep(200);
/* Firmware does report valid information. */
error = ili251x_firmware_update_resolution(dev);
if (error)
return error;
error = ili251x_firmware_update_firmware_version(dev);
if (error)
return error;
error = ili251x_firmware_update_kernel_version(dev);
if (error)
return error;
error = ili251x_firmware_update_protocol_version(dev);
if (error)
return error;
error = ili251x_firmware_update_ic_mode(dev);
if (error)
return error;
return 0;
}
static ssize_t ili251x_firmware_version_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct ili210x *priv = i2c_get_clientdata(client);
u8 *fw = priv->version_firmware;
return sysfs_emit(buf, "%02x%02x.%02x%02x.%02x%02x.%02x%02x\n",
fw[0], fw[1], fw[2], fw[3],
fw[4], fw[5], fw[6], fw[7]);
}
static DEVICE_ATTR(firmware_version, 0444, ili251x_firmware_version_show, NULL);
static ssize_t ili251x_kernel_version_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct ili210x *priv = i2c_get_clientdata(client);
u8 *kv = priv->version_kernel;
return sysfs_emit(buf, "%02x.%02x.%02x.%02x.%02x\n",
kv[0], kv[1], kv[2], kv[3], kv[4]);
}
static DEVICE_ATTR(kernel_version, 0444, ili251x_kernel_version_show, NULL);
static ssize_t ili251x_protocol_version_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct ili210x *priv = i2c_get_clientdata(client);
u8 *pv = priv->version_proto;
return sysfs_emit(buf, "%02x.%02x\n", pv[0], pv[1]);
}
static DEVICE_ATTR(protocol_version, 0444, ili251x_protocol_version_show, NULL);
static ssize_t ili251x_mode_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct ili210x *priv = i2c_get_clientdata(client);
u8 *md = priv->ic_mode;
char *mode = "AP";
if (md[0] == REG_GET_MODE_AP) /* Application Mode */
mode = "AP";
else if (md[0] == REG_GET_MODE_BL) /* BootLoader Mode */
mode = "BL";
else /* Unknown Mode */
mode = "??";
return sysfs_emit(buf, "%02x.%02x:%s\n", md[0], md[1], mode);
}
static DEVICE_ATTR(mode, 0444, ili251x_mode_show, NULL);
static ssize_t ili210x_calibrate(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct ili210x *priv = i2c_get_clientdata(client);
unsigned long calibrate;
int rc;
u8 cmd = REG_CALIBRATE;
if (kstrtoul(buf, 10, &calibrate))
return -EINVAL;
if (calibrate > 1)
return -EINVAL;
if (calibrate) {
rc = i2c_master_send(priv->client, &cmd, sizeof(cmd));
if (rc != sizeof(cmd))
return -EIO;
}
return count;
}
static DEVICE_ATTR(calibrate, S_IWUSR, NULL, ili210x_calibrate);
static int ili251x_firmware_to_buffer(const struct firmware *fw,
u8 **buf, u16 *ac_end, u16 *df_end)
{
const struct ihex_binrec *rec;
u32 fw_addr, fw_last_addr = 0;
u16 fw_len;
u8 *fw_buf;
int error;
/*
* The firmware ihex blob can never be bigger than 64 kiB, so make this
* simple -- allocate a 64 kiB buffer, iterate over the ihex blob records
* once, copy them all into this buffer at the right locations, and then
* do all operations on this linear buffer.
*/
fw_buf = kzalloc(SZ_64K, GFP_KERNEL);
if (!fw_buf)
return -ENOMEM;
rec = (const struct ihex_binrec *)fw->data;
while (rec) {
fw_addr = be32_to_cpu(rec->addr);
fw_len = be16_to_cpu(rec->len);
/* The last 32 Byte firmware block can be 0xffe0 */
if (fw_addr + fw_len > SZ_64K || fw_addr > SZ_64K - 32) {
error = -EFBIG;
goto err_big;
}
/* Find the last address before DF start address, that is AC end */
if (fw_addr == 0xf000)
*ac_end = fw_last_addr;
fw_last_addr = fw_addr + fw_len;
memcpy(fw_buf + fw_addr, rec->data, fw_len);
rec = ihex_next_binrec(rec);
}
/* DF end address is the last address in the firmware blob */
*df_end = fw_addr + fw_len;
*buf = fw_buf;
return 0;
err_big:
kfree(fw_buf);
return error;
}
/* Switch mode between Application and BootLoader */
static int ili251x_switch_ic_mode(struct i2c_client *client, u8 cmd_mode)
{
struct ili210x *priv = i2c_get_clientdata(client);
u8 cmd_wren[3] = { REG_WRITE_ENABLE, 0x5a, 0xa5 };
u8 md[2];
int error;
error = priv->chip->read_reg(client, REG_GET_MODE, md, sizeof(md));
if (error)
return error;
/* Mode already set */
if ((cmd_mode == REG_SET_MODE_AP && md[0] == REG_GET_MODE_AP) ||
(cmd_mode == REG_SET_MODE_BL && md[0] == REG_GET_MODE_BL))
return 0;
/* Unlock writes */
error = i2c_master_send(client, cmd_wren, sizeof(cmd_wren));
if (error != sizeof(cmd_wren))
return -EINVAL;
mdelay(20);
/* Select mode (BootLoader or Application) */
error = i2c_master_send(client, &cmd_mode, 1);
if (error != 1)
return -EINVAL;
mdelay(200); /* Reboot into bootloader takes a lot of time ... */
/* Read back mode */
error = priv->chip->read_reg(client, REG_GET_MODE, md, sizeof(md));
if (error)
return error;
/* Check if mode is correct now. */
if ((cmd_mode == REG_SET_MODE_AP && md[0] == REG_GET_MODE_AP) ||
(cmd_mode == REG_SET_MODE_BL && md[0] == REG_GET_MODE_BL))
return 0;
return -EINVAL;
}
static int ili251x_firmware_busy(struct i2c_client *client)
{
struct ili210x *priv = i2c_get_clientdata(client);
int error, i = 0;
u8 data;
do {
/* The read_reg already contains suitable delay */
error = priv->chip->read_reg(client, REG_IC_BUSY, &data, 1);
if (error)
return error;
if (i++ == 100000)
return -ETIMEDOUT;
} while (data != REG_IC_BUSY_NOT_BUSY);
return 0;
}
static int ili251x_firmware_write_to_ic(struct device *dev, u8 *fwbuf,
u16 start, u16 end, u8 dataflash)
{
struct i2c_client *client = to_i2c_client(dev);
struct ili210x *priv = i2c_get_clientdata(client);
u8 cmd_crc = REG_READ_DATA_CRC;
u8 crcrb[4] = { 0 };
u8 fw_data[33];
u16 fw_addr;
int error;
/*
* The DF (dataflash) needs 2 bytes offset for unknown reasons,
* the AC (application) has 2 bytes CRC16-CCITT at the end.
*/
u16 crc = crc_ccitt(0, fwbuf + start + (dataflash ? 2 : 0),
end - start - 2);
/* Unlock write to either AC (application) or DF (dataflash) area */
u8 cmd_wr[10] = {
REG_WRITE_ENABLE, 0x5a, 0xa5, dataflash,
(end >> 16) & 0xff, (end >> 8) & 0xff, end & 0xff,
(crc >> 16) & 0xff, (crc >> 8) & 0xff, crc & 0xff
};
error = i2c_master_send(client, cmd_wr, sizeof(cmd_wr));
if (error != sizeof(cmd_wr))
return -EINVAL;
error = ili251x_firmware_busy(client);
if (error)
return error;
for (fw_addr = start; fw_addr < end; fw_addr += 32) {
fw_data[0] = REG_WRITE_DATA;
memcpy(&(fw_data[1]), fwbuf + fw_addr, 32);
error = i2c_master_send(client, fw_data, 33);
if (error != sizeof(fw_data))
return error;
error = ili251x_firmware_busy(client);
if (error)
return error;
}
error = i2c_master_send(client, &cmd_crc, 1);
if (error != 1)
return -EINVAL;
error = ili251x_firmware_busy(client);
if (error)
return error;
error = priv->chip->read_reg(client, REG_READ_DATA_CRC,
&crcrb, sizeof(crcrb));
if (error)
return error;
/* Check CRC readback */
if ((crcrb[0] != (crc & 0xff)) || crcrb[1] != ((crc >> 8) & 0xff))
return -EINVAL;
return 0;
}
static int ili251x_firmware_reset(struct i2c_client *client)
{
u8 cmd_reset[2] = { 0xf2, 0x01 };
int error;
error = i2c_master_send(client, cmd_reset, sizeof(cmd_reset));
if (error != sizeof(cmd_reset))
return -EINVAL;
return ili251x_firmware_busy(client);
}
static void ili210x_hardware_reset(struct gpio_desc *reset_gpio)
{
/* Reset the controller */
gpiod_set_value_cansleep(reset_gpio, 1);
usleep_range(12000, 15000);
gpiod_set_value_cansleep(reset_gpio, 0);
msleep(300);
}
static ssize_t ili210x_firmware_update_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct ili210x *priv = i2c_get_clientdata(client);
const char *fwname = ILI251X_FW_FILENAME;
const struct firmware *fw;
u16 ac_end, df_end;
u8 *fwbuf;
int error;
int i;
error = request_ihex_firmware(&fw, fwname, dev);
if (error) {
dev_err(dev, "Failed to request firmware %s, error=%d\n",
fwname, error);
return error;
}
error = ili251x_firmware_to_buffer(fw, &fwbuf, &ac_end, &df_end);
release_firmware(fw);
if (error)
return error;
/*
* Disable touchscreen IRQ, so that we would not get spurious touch
* interrupt during firmware update, and so that the IRQ handler won't
* trigger and interfere with the firmware update. There is no bit in
* the touch controller to disable the IRQs during update, so we have
* to do it this way here.
*/
disable_irq(client->irq);
dev_dbg(dev, "Firmware update started, firmware=%s\n", fwname);
ili210x_hardware_reset(priv->reset_gpio);
error = ili251x_firmware_reset(client);
if (error)
goto exit;
/* This may not succeed on first try, so re-try a few times. */
for (i = 0; i < 5; i++) {
error = ili251x_switch_ic_mode(client, REG_SET_MODE_BL);
if (!error)
break;
}
if (error)
goto exit;
dev_dbg(dev, "IC is now in BootLoader mode\n");
msleep(200); /* The bootloader seems to need some time too. */
error = ili251x_firmware_write_to_ic(dev, fwbuf, 0xf000, df_end, 1);
if (error) {
dev_err(dev, "DF firmware update failed, error=%d\n", error);
goto exit;
}
dev_dbg(dev, "DataFlash firmware written\n");
error = ili251x_firmware_write_to_ic(dev, fwbuf, 0x2000, ac_end, 0);
if (error) {
dev_err(dev, "AC firmware update failed, error=%d\n", error);
goto exit;
}
dev_dbg(dev, "Application firmware written\n");
/* This may not succeed on first try, so re-try a few times. */
for (i = 0; i < 5; i++) {
error = ili251x_switch_ic_mode(client, REG_SET_MODE_AP);
if (!error)
break;
}
if (error)
goto exit;
dev_dbg(dev, "IC is now in Application mode\n");
error = ili251x_firmware_update_cached_state(dev);
if (error)
goto exit;
error = count;
exit:
ili210x_hardware_reset(priv->reset_gpio);
dev_dbg(dev, "Firmware update ended, error=%i\n", error);
enable_irq(client->irq);
kfree(fwbuf);
return error;
}
static DEVICE_ATTR(firmware_update, 0200, NULL, ili210x_firmware_update_store);
static struct attribute *ili210x_attributes[] = {
&dev_attr_calibrate.attr,
&dev_attr_firmware_update.attr,
&dev_attr_firmware_version.attr,
&dev_attr_kernel_version.attr,
&dev_attr_protocol_version.attr,
&dev_attr_mode.attr,
NULL,
};
static umode_t ili210x_attributes_visible(struct kobject *kobj,
struct attribute *attr, int index)
{
struct device *dev = kobj_to_dev(kobj);
struct i2c_client *client = to_i2c_client(dev);
struct ili210x *priv = i2c_get_clientdata(client);
/* Calibrate is present on all ILI2xxx which have calibrate register */
if (attr == &dev_attr_calibrate.attr)
return priv->chip->has_calibrate_reg ? attr->mode : 0;
/* Firmware/Kernel/Protocol/BootMode is implememted only for ILI251x */
if (!priv->chip->has_firmware_proto)
return 0;
return attr->mode;
}
static const struct attribute_group ili210x_attr_group = {
.attrs = ili210x_attributes,
.is_visible = ili210x_attributes_visible,
};
static void ili210x_power_down(void *data)
{
struct gpio_desc *reset_gpio = data;
gpiod_set_value_cansleep(reset_gpio, 1);
}
static void ili210x_stop(void *data)
{
struct ili210x *priv = data;
/* Tell ISR to quit even if there is a contact. */
priv->stop = true;
}
static int ili210x_i2c_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct device *dev = &client->dev;
const struct ili2xxx_chip *chip;
struct ili210x *priv;
struct gpio_desc *reset_gpio;
struct input_dev *input;
int error;
unsigned int max_xy;
dev_dbg(dev, "Probing for ILI210X I2C Touschreen driver");
chip = device_get_match_data(dev);
if (!chip && id)
chip = (const struct ili2xxx_chip *)id->driver_data;
if (!chip) {
dev_err(&client->dev, "unknown device model\n");
return -ENODEV;
}
if (client->irq <= 0) {
dev_err(dev, "No IRQ!\n");
return -EINVAL;
}
reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(reset_gpio))
return PTR_ERR(reset_gpio);
if (reset_gpio) {
error = devm_add_action_or_reset(dev, ili210x_power_down,
reset_gpio);
if (error)
return error;
ili210x_hardware_reset(reset_gpio);
}
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
input = devm_input_allocate_device(dev);
if (!input)
return -ENOMEM;
priv->client = client;
priv->input = input;
priv->reset_gpio = reset_gpio;
priv->chip = chip;
i2c_set_clientdata(client, priv);
/* Setup input device */
input->name = "ILI210x Touchscreen";
input->id.bustype = BUS_I2C;
/* Multi touch */
max_xy = (chip->resolution ?: SZ_64K) - 1;
input_set_abs_params(input, ABS_MT_POSITION_X, 0, max_xy, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0, max_xy, 0, 0);
if (priv->chip->has_pressure_reg)
input_set_abs_params(input, ABS_MT_PRESSURE, 0, 0xa, 0, 0);
error = ili251x_firmware_update_cached_state(dev);
if (error)
dev_warn(dev, "Unable to cache firmware information, err: %d\n",
error);
touchscreen_parse_properties(input, true, &priv->prop);
error = input_mt_init_slots(input, priv->chip->max_touches,
INPUT_MT_DIRECT);
if (error) {
dev_err(dev, "Unable to set up slots, err: %d\n", error);
return error;
}
error = devm_request_threaded_irq(dev, client->irq, NULL, ili210x_irq,
IRQF_ONESHOT, client->name, priv);
if (error) {
dev_err(dev, "Unable to request touchscreen IRQ, err: %d\n",
error);
return error;
}
error = devm_add_action_or_reset(dev, ili210x_stop, priv);
if (error)
return error;
error = devm_device_add_group(dev, &ili210x_attr_group);
if (error) {
dev_err(dev, "Unable to create sysfs attributes, err: %d\n",
error);
return error;
}
error = input_register_device(priv->input);
if (error) {
dev_err(dev, "Cannot register input device, err: %d\n", error);
return error;
}
return 0;
}
static const struct i2c_device_id ili210x_i2c_id[] = {
{ "ili210x", (long)&ili210x_chip },
{ "ili2117", (long)&ili211x_chip },
{ "ili2120", (long)&ili212x_chip },
{ "ili251x", (long)&ili251x_chip },
{ }
};
MODULE_DEVICE_TABLE(i2c, ili210x_i2c_id);
static const struct of_device_id ili210x_dt_ids[] = {
{ .compatible = "ilitek,ili210x", .data = &ili210x_chip },
{ .compatible = "ilitek,ili2117", .data = &ili211x_chip },
{ .compatible = "ilitek,ili2120", .data = &ili212x_chip },
{ .compatible = "ilitek,ili251x", .data = &ili251x_chip },
{ }
};
MODULE_DEVICE_TABLE(of, ili210x_dt_ids);
static struct i2c_driver ili210x_ts_driver = {
.driver = {
.name = "ili210x_i2c",
.of_match_table = ili210x_dt_ids,
},
.id_table = ili210x_i2c_id,
.probe = ili210x_i2c_probe,
};
module_i2c_driver(ili210x_ts_driver);
MODULE_AUTHOR("Olivier Sobrie <[email protected]>");
MODULE_DESCRIPTION("ILI210X I2C Touchscreen Driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/ili210x.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* ROHM BU21023/24 Dual touch support resistive touch screen driver
* Copyright (C) 2012 ROHM CO.,LTD.
*/
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/slab.h>
#define BU21023_NAME "bu21023_ts"
#define BU21023_FIRMWARE_NAME "bu21023.bin"
#define MAX_CONTACTS 2
#define AXIS_ADJUST 4
#define AXIS_OFFSET 8
#define FIRMWARE_BLOCK_SIZE 32U
#define FIRMWARE_RETRY_MAX 4
#define SAMPLING_DELAY 12 /* msec */
#define CALIBRATION_RETRY_MAX 6
#define ROHM_TS_ABS_X_MIN 40
#define ROHM_TS_ABS_X_MAX 990
#define ROHM_TS_ABS_Y_MIN 160
#define ROHM_TS_ABS_Y_MAX 920
#define ROHM_TS_DISPLACEMENT_MAX 0 /* zero for infinite */
/*
* BU21023GUL/BU21023MUV/BU21024FV-M registers map
*/
#define VADOUT_YP_H 0x00
#define VADOUT_YP_L 0x01
#define VADOUT_XP_H 0x02
#define VADOUT_XP_L 0x03
#define VADOUT_YN_H 0x04
#define VADOUT_YN_L 0x05
#define VADOUT_XN_H 0x06
#define VADOUT_XN_L 0x07
#define PRM1_X_H 0x08
#define PRM1_X_L 0x09
#define PRM1_Y_H 0x0a
#define PRM1_Y_L 0x0b
#define PRM2_X_H 0x0c
#define PRM2_X_L 0x0d
#define PRM2_Y_H 0x0e
#define PRM2_Y_L 0x0f
#define MLT_PRM_MONI_X 0x10
#define MLT_PRM_MONI_Y 0x11
#define DEBUG_MONI_1 0x12
#define DEBUG_MONI_2 0x13
#define VADOUT_ZX_H 0x14
#define VADOUT_ZX_L 0x15
#define VADOUT_ZY_H 0x16
#define VADOUT_ZY_L 0x17
#define Z_PARAM_H 0x18
#define Z_PARAM_L 0x19
/*
* Value for VADOUT_*_L
*/
#define VADOUT_L_MASK 0x01
/*
* Value for PRM*_*_L
*/
#define PRM_L_MASK 0x01
#define POS_X1_H 0x20
#define POS_X1_L 0x21
#define POS_Y1_H 0x22
#define POS_Y1_L 0x23
#define POS_X2_H 0x24
#define POS_X2_L 0x25
#define POS_Y2_H 0x26
#define POS_Y2_L 0x27
/*
* Value for POS_*_L
*/
#define POS_L_MASK 0x01
#define TOUCH 0x28
#define TOUCH_DETECT 0x01
#define TOUCH_GESTURE 0x29
#define SINGLE_TOUCH 0x01
#define DUAL_TOUCH 0x03
#define TOUCH_MASK 0x03
#define CALIBRATION_REQUEST 0x04
#define CALIBRATION_STATUS 0x08
#define CALIBRATION_MASK 0x0c
#define GESTURE_SPREAD 0x10
#define GESTURE_PINCH 0x20
#define GESTURE_ROTATE_R 0x40
#define GESTURE_ROTATE_L 0x80
#define INT_STATUS 0x2a
#define INT_MASK 0x3d
#define INT_CLEAR 0x3e
/*
* Values for INT_*
*/
#define COORD_UPDATE 0x01
#define CALIBRATION_DONE 0x02
#define SLEEP_IN 0x04
#define SLEEP_OUT 0x08
#define PROGRAM_LOAD_DONE 0x10
#define ERROR 0x80
#define INT_ALL 0x9f
#define ERR_STATUS 0x2b
#define ERR_MASK 0x3f
/*
* Values for ERR_*
*/
#define ADC_TIMEOUT 0x01
#define CPU_TIMEOUT 0x02
#define CALIBRATION_ERR 0x04
#define PROGRAM_LOAD_ERR 0x10
#define COMMON_SETUP1 0x30
#define PROGRAM_LOAD_HOST 0x02
#define PROGRAM_LOAD_EEPROM 0x03
#define CENSOR_4PORT 0x04
#define CENSOR_8PORT 0x00 /* Not supported by BU21023 */
#define CALIBRATION_TYPE_DEFAULT 0x08
#define CALIBRATION_TYPE_SPECIAL 0x00
#define INT_ACTIVE_HIGH 0x10
#define INT_ACTIVE_LOW 0x00
#define AUTO_CALIBRATION 0x40
#define MANUAL_CALIBRATION 0x00
#define COMMON_SETUP1_DEFAULT 0x4e
#define COMMON_SETUP2 0x31
#define MAF_NONE 0x00
#define MAF_1SAMPLE 0x01
#define MAF_3SAMPLES 0x02
#define MAF_5SAMPLES 0x03
#define INV_Y 0x04
#define INV_X 0x08
#define SWAP_XY 0x10
#define COMMON_SETUP3 0x32
#define EN_SLEEP 0x01
#define EN_MULTI 0x02
#define EN_GESTURE 0x04
#define EN_INTVL 0x08
#define SEL_STEP 0x10
#define SEL_MULTI 0x20
#define SEL_TBL_DEFAULT 0x40
#define INTERVAL_TIME 0x33
#define INTERVAL_TIME_DEFAULT 0x10
#define STEP_X 0x34
#define STEP_X_DEFAULT 0x41
#define STEP_Y 0x35
#define STEP_Y_DEFAULT 0x8d
#define OFFSET_X 0x38
#define OFFSET_X_DEFAULT 0x0c
#define OFFSET_Y 0x39
#define OFFSET_Y_DEFAULT 0x0c
#define THRESHOLD_TOUCH 0x3a
#define THRESHOLD_TOUCH_DEFAULT 0xa0
#define THRESHOLD_GESTURE 0x3b
#define THRESHOLD_GESTURE_DEFAULT 0x17
#define SYSTEM 0x40
#define ANALOG_POWER_ON 0x01
#define ANALOG_POWER_OFF 0x00
#define CPU_POWER_ON 0x02
#define CPU_POWER_OFF 0x00
#define FORCE_CALIBRATION 0x42
#define FORCE_CALIBRATION_ON 0x01
#define FORCE_CALIBRATION_OFF 0x00
#define CPU_FREQ 0x50 /* 10 / (reg + 1) MHz */
#define CPU_FREQ_10MHZ 0x00
#define CPU_FREQ_5MHZ 0x01
#define CPU_FREQ_1MHZ 0x09
#define EEPROM_ADDR 0x51
#define CALIBRATION_ADJUST 0x52
#define CALIBRATION_ADJUST_DEFAULT 0x00
#define THRESHOLD_SLEEP_IN 0x53
#define EVR_XY 0x56
#define EVR_XY_DEFAULT 0x10
#define PRM_SWOFF_TIME 0x57
#define PRM_SWOFF_TIME_DEFAULT 0x04
#define PROGRAM_VERSION 0x5f
#define ADC_CTRL 0x60
#define ADC_DIV_MASK 0x1f /* The minimum value is 4 */
#define ADC_DIV_DEFAULT 0x08
#define ADC_WAIT 0x61
#define ADC_WAIT_DEFAULT 0x0a
#define SWCONT 0x62
#define SWCONT_DEFAULT 0x0f
#define EVR_X 0x63
#define EVR_X_DEFAULT 0x86
#define EVR_Y 0x64
#define EVR_Y_DEFAULT 0x64
#define TEST1 0x65
#define DUALTOUCH_STABILIZE_ON 0x01
#define DUALTOUCH_STABILIZE_OFF 0x00
#define DUALTOUCH_REG_ON 0x20
#define DUALTOUCH_REG_OFF 0x00
#define CALIBRATION_REG1 0x68
#define CALIBRATION_REG1_DEFAULT 0xd9
#define CALIBRATION_REG2 0x69
#define CALIBRATION_REG2_DEFAULT 0x36
#define CALIBRATION_REG3 0x6a
#define CALIBRATION_REG3_DEFAULT 0x32
#define EX_ADDR_H 0x70
#define EX_ADDR_L 0x71
#define EX_WDAT 0x72
#define EX_RDAT 0x73
#define EX_CHK_SUM1 0x74
#define EX_CHK_SUM2 0x75
#define EX_CHK_SUM3 0x76
struct rohm_ts_data {
struct i2c_client *client;
struct input_dev *input;
bool initialized;
unsigned int contact_count[MAX_CONTACTS + 1];
int finger_count;
u8 setup2;
};
/*
* rohm_i2c_burst_read - execute combined I2C message for ROHM BU21023/24
* @client: Handle to ROHM BU21023/24
* @start: Where to start read address from ROHM BU21023/24
* @buf: Where to store read data from ROHM BU21023/24
* @len: How many bytes to read
*
* Returns negative errno, else zero on success.
*
* Note
* In BU21023/24 burst read, stop condition is needed after "address write".
* Therefore, transmission is performed in 2 steps.
*/
static int rohm_i2c_burst_read(struct i2c_client *client, u8 start, void *buf,
size_t len)
{
struct i2c_adapter *adap = client->adapter;
struct i2c_msg msg[2];
int i, ret = 0;
msg[0].addr = client->addr;
msg[0].flags = 0;
msg[0].len = 1;
msg[0].buf = &start;
msg[1].addr = client->addr;
msg[1].flags = I2C_M_RD;
msg[1].len = len;
msg[1].buf = buf;
i2c_lock_bus(adap, I2C_LOCK_SEGMENT);
for (i = 0; i < 2; i++) {
if (__i2c_transfer(adap, &msg[i], 1) < 0) {
ret = -EIO;
break;
}
}
i2c_unlock_bus(adap, I2C_LOCK_SEGMENT);
return ret;
}
static int rohm_ts_manual_calibration(struct rohm_ts_data *ts)
{
struct i2c_client *client = ts->client;
struct device *dev = &client->dev;
u8 buf[33]; /* for PRM1_X_H(0x08)-TOUCH(0x28) */
int retry;
bool success = false;
bool first_time = true;
bool calibration_done;
u8 reg1, reg2, reg3;
s32 reg1_orig, reg2_orig, reg3_orig;
s32 val;
int calib_x = 0, calib_y = 0;
int reg_x, reg_y;
int err_x, err_y;
int error, error2;
int i;
reg1_orig = i2c_smbus_read_byte_data(client, CALIBRATION_REG1);
if (reg1_orig < 0)
return reg1_orig;
reg2_orig = i2c_smbus_read_byte_data(client, CALIBRATION_REG2);
if (reg2_orig < 0)
return reg2_orig;
reg3_orig = i2c_smbus_read_byte_data(client, CALIBRATION_REG3);
if (reg3_orig < 0)
return reg3_orig;
error = i2c_smbus_write_byte_data(client, INT_MASK,
COORD_UPDATE | SLEEP_IN | SLEEP_OUT |
PROGRAM_LOAD_DONE);
if (error)
goto out;
error = i2c_smbus_write_byte_data(client, TEST1,
DUALTOUCH_STABILIZE_ON);
if (error)
goto out;
for (retry = 0; retry < CALIBRATION_RETRY_MAX; retry++) {
/* wait 2 sampling for update */
mdelay(2 * SAMPLING_DELAY);
#define READ_CALIB_BUF(reg) buf[((reg) - PRM1_X_H)]
error = rohm_i2c_burst_read(client, PRM1_X_H, buf, sizeof(buf));
if (error)
goto out;
if (READ_CALIB_BUF(TOUCH) & TOUCH_DETECT)
continue;
if (first_time) {
/* generate calibration parameter */
calib_x = ((int)READ_CALIB_BUF(PRM1_X_H) << 2 |
READ_CALIB_BUF(PRM1_X_L)) - AXIS_OFFSET;
calib_y = ((int)READ_CALIB_BUF(PRM1_Y_H) << 2 |
READ_CALIB_BUF(PRM1_Y_L)) - AXIS_OFFSET;
error = i2c_smbus_write_byte_data(client, TEST1,
DUALTOUCH_STABILIZE_ON | DUALTOUCH_REG_ON);
if (error)
goto out;
first_time = false;
} else {
/* generate adjustment parameter */
err_x = (int)READ_CALIB_BUF(PRM1_X_H) << 2 |
READ_CALIB_BUF(PRM1_X_L);
err_y = (int)READ_CALIB_BUF(PRM1_Y_H) << 2 |
READ_CALIB_BUF(PRM1_Y_L);
/* X axis ajust */
if (err_x <= 4)
calib_x -= AXIS_ADJUST;
else if (err_x >= 60)
calib_x += AXIS_ADJUST;
/* Y axis ajust */
if (err_y <= 4)
calib_y -= AXIS_ADJUST;
else if (err_y >= 60)
calib_y += AXIS_ADJUST;
}
/* generate calibration setting value */
reg_x = calib_x + ((calib_x & 0x200) << 1);
reg_y = calib_y + ((calib_y & 0x200) << 1);
/* convert for register format */
reg1 = reg_x >> 3;
reg2 = (reg_y & 0x7) << 4 | (reg_x & 0x7);
reg3 = reg_y >> 3;
error = i2c_smbus_write_byte_data(client,
CALIBRATION_REG1, reg1);
if (error)
goto out;
error = i2c_smbus_write_byte_data(client,
CALIBRATION_REG2, reg2);
if (error)
goto out;
error = i2c_smbus_write_byte_data(client,
CALIBRATION_REG3, reg3);
if (error)
goto out;
/*
* force calibration sequcence
*/
error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION,
FORCE_CALIBRATION_OFF);
if (error)
goto out;
error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION,
FORCE_CALIBRATION_ON);
if (error)
goto out;
/* clear all interrupts */
error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff);
if (error)
goto out;
/*
* Wait for the status change of calibration, max 10 sampling
*/
calibration_done = false;
for (i = 0; i < 10; i++) {
mdelay(SAMPLING_DELAY);
val = i2c_smbus_read_byte_data(client, TOUCH_GESTURE);
if (!(val & CALIBRATION_MASK)) {
calibration_done = true;
break;
} else if (val < 0) {
error = val;
goto out;
}
}
if (calibration_done) {
val = i2c_smbus_read_byte_data(client, INT_STATUS);
if (val == CALIBRATION_DONE) {
success = true;
break;
} else if (val < 0) {
error = val;
goto out;
}
} else {
dev_warn(dev, "calibration timeout\n");
}
}
if (!success) {
error = i2c_smbus_write_byte_data(client, CALIBRATION_REG1,
reg1_orig);
if (error)
goto out;
error = i2c_smbus_write_byte_data(client, CALIBRATION_REG2,
reg2_orig);
if (error)
goto out;
error = i2c_smbus_write_byte_data(client, CALIBRATION_REG3,
reg3_orig);
if (error)
goto out;
/* calibration data enable */
error = i2c_smbus_write_byte_data(client, TEST1,
DUALTOUCH_STABILIZE_ON |
DUALTOUCH_REG_ON);
if (error)
goto out;
/* wait 10 sampling */
mdelay(10 * SAMPLING_DELAY);
error = -EBUSY;
}
out:
error2 = i2c_smbus_write_byte_data(client, INT_MASK, INT_ALL);
if (!error2)
/* Clear all interrupts */
error2 = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff);
return error ? error : error2;
}
static const unsigned int untouch_threshold[3] = { 0, 1, 5 };
static const unsigned int single_touch_threshold[3] = { 0, 0, 4 };
static const unsigned int dual_touch_threshold[3] = { 10, 8, 0 };
static irqreturn_t rohm_ts_soft_irq(int irq, void *dev_id)
{
struct rohm_ts_data *ts = dev_id;
struct i2c_client *client = ts->client;
struct input_dev *input_dev = ts->input;
struct device *dev = &client->dev;
u8 buf[10]; /* for POS_X1_H(0x20)-TOUCH_GESTURE(0x29) */
struct input_mt_pos pos[MAX_CONTACTS];
int slots[MAX_CONTACTS];
u8 touch_flags;
unsigned int threshold;
int finger_count = -1;
int prev_finger_count = ts->finger_count;
int count;
int error;
int i;
error = i2c_smbus_write_byte_data(client, INT_MASK, INT_ALL);
if (error)
return IRQ_HANDLED;
/* Clear all interrupts */
error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff);
if (error)
return IRQ_HANDLED;
#define READ_POS_BUF(reg) buf[((reg) - POS_X1_H)]
error = rohm_i2c_burst_read(client, POS_X1_H, buf, sizeof(buf));
if (error)
return IRQ_HANDLED;
touch_flags = READ_POS_BUF(TOUCH_GESTURE) & TOUCH_MASK;
if (touch_flags) {
/* generate coordinates */
pos[0].x = ((s16)READ_POS_BUF(POS_X1_H) << 2) |
READ_POS_BUF(POS_X1_L);
pos[0].y = ((s16)READ_POS_BUF(POS_Y1_H) << 2) |
READ_POS_BUF(POS_Y1_L);
pos[1].x = ((s16)READ_POS_BUF(POS_X2_H) << 2) |
READ_POS_BUF(POS_X2_L);
pos[1].y = ((s16)READ_POS_BUF(POS_Y2_H) << 2) |
READ_POS_BUF(POS_Y2_L);
}
switch (touch_flags) {
case 0:
threshold = untouch_threshold[prev_finger_count];
if (++ts->contact_count[0] >= threshold)
finger_count = 0;
break;
case SINGLE_TOUCH:
threshold = single_touch_threshold[prev_finger_count];
if (++ts->contact_count[1] >= threshold)
finger_count = 1;
if (finger_count == 1) {
if (pos[1].x != 0 && pos[1].y != 0) {
pos[0].x = pos[1].x;
pos[0].y = pos[1].y;
pos[1].x = 0;
pos[1].y = 0;
}
}
break;
case DUAL_TOUCH:
threshold = dual_touch_threshold[prev_finger_count];
if (++ts->contact_count[2] >= threshold)
finger_count = 2;
break;
default:
dev_dbg(dev,
"Three or more touches are not supported\n");
return IRQ_HANDLED;
}
if (finger_count >= 0) {
if (prev_finger_count != finger_count) {
count = ts->contact_count[finger_count];
memset(ts->contact_count, 0, sizeof(ts->contact_count));
ts->contact_count[finger_count] = count;
}
input_mt_assign_slots(input_dev, slots, pos,
finger_count, ROHM_TS_DISPLACEMENT_MAX);
for (i = 0; i < finger_count; i++) {
input_mt_slot(input_dev, slots[i]);
input_mt_report_slot_state(input_dev,
MT_TOOL_FINGER, true);
input_report_abs(input_dev,
ABS_MT_POSITION_X, pos[i].x);
input_report_abs(input_dev,
ABS_MT_POSITION_Y, pos[i].y);
}
input_mt_sync_frame(input_dev);
input_mt_report_pointer_emulation(input_dev, true);
input_sync(input_dev);
ts->finger_count = finger_count;
}
if (READ_POS_BUF(TOUCH_GESTURE) & CALIBRATION_REQUEST) {
error = rohm_ts_manual_calibration(ts);
if (error)
dev_warn(dev, "manual calibration failed: %d\n",
error);
}
i2c_smbus_write_byte_data(client, INT_MASK,
CALIBRATION_DONE | SLEEP_OUT | SLEEP_IN |
PROGRAM_LOAD_DONE);
return IRQ_HANDLED;
}
static int rohm_ts_load_firmware(struct i2c_client *client,
const char *firmware_name)
{
struct device *dev = &client->dev;
const struct firmware *fw;
s32 status;
unsigned int offset, len, xfer_len;
unsigned int retry = 0;
int error, error2;
error = request_firmware(&fw, firmware_name, dev);
if (error) {
dev_err(dev, "unable to retrieve firmware %s: %d\n",
firmware_name, error);
return error;
}
error = i2c_smbus_write_byte_data(client, INT_MASK,
COORD_UPDATE | CALIBRATION_DONE |
SLEEP_IN | SLEEP_OUT);
if (error)
goto out;
do {
if (retry) {
dev_warn(dev, "retrying firmware load\n");
/* settings for retry */
error = i2c_smbus_write_byte_data(client, EX_WDAT, 0);
if (error)
goto out;
}
error = i2c_smbus_write_byte_data(client, EX_ADDR_H, 0);
if (error)
goto out;
error = i2c_smbus_write_byte_data(client, EX_ADDR_L, 0);
if (error)
goto out;
error = i2c_smbus_write_byte_data(client, COMMON_SETUP1,
COMMON_SETUP1_DEFAULT);
if (error)
goto out;
/* firmware load to the device */
offset = 0;
len = fw->size;
while (len) {
xfer_len = min(FIRMWARE_BLOCK_SIZE, len);
error = i2c_smbus_write_i2c_block_data(client, EX_WDAT,
xfer_len, &fw->data[offset]);
if (error)
goto out;
len -= xfer_len;
offset += xfer_len;
}
/* check firmware load result */
status = i2c_smbus_read_byte_data(client, INT_STATUS);
if (status < 0) {
error = status;
goto out;
}
/* clear all interrupts */
error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff);
if (error)
goto out;
if (status == PROGRAM_LOAD_DONE)
break;
error = -EIO;
} while (++retry <= FIRMWARE_RETRY_MAX);
out:
error2 = i2c_smbus_write_byte_data(client, INT_MASK, INT_ALL);
release_firmware(fw);
return error ? error : error2;
}
static ssize_t swap_xy_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct rohm_ts_data *ts = i2c_get_clientdata(client);
return sprintf(buf, "%d\n", !!(ts->setup2 & SWAP_XY));
}
static ssize_t swap_xy_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct rohm_ts_data *ts = i2c_get_clientdata(client);
unsigned int val;
int error;
error = kstrtouint(buf, 0, &val);
if (error)
return error;
error = mutex_lock_interruptible(&ts->input->mutex);
if (error)
return error;
if (val)
ts->setup2 |= SWAP_XY;
else
ts->setup2 &= ~SWAP_XY;
if (ts->initialized)
error = i2c_smbus_write_byte_data(ts->client, COMMON_SETUP2,
ts->setup2);
mutex_unlock(&ts->input->mutex);
return error ? error : count;
}
static ssize_t inv_x_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct rohm_ts_data *ts = i2c_get_clientdata(client);
return sprintf(buf, "%d\n", !!(ts->setup2 & INV_X));
}
static ssize_t inv_x_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct rohm_ts_data *ts = i2c_get_clientdata(client);
unsigned int val;
int error;
error = kstrtouint(buf, 0, &val);
if (error)
return error;
error = mutex_lock_interruptible(&ts->input->mutex);
if (error)
return error;
if (val)
ts->setup2 |= INV_X;
else
ts->setup2 &= ~INV_X;
if (ts->initialized)
error = i2c_smbus_write_byte_data(ts->client, COMMON_SETUP2,
ts->setup2);
mutex_unlock(&ts->input->mutex);
return error ? error : count;
}
static ssize_t inv_y_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct rohm_ts_data *ts = i2c_get_clientdata(client);
return sprintf(buf, "%d\n", !!(ts->setup2 & INV_Y));
}
static ssize_t inv_y_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct rohm_ts_data *ts = i2c_get_clientdata(client);
unsigned int val;
int error;
error = kstrtouint(buf, 0, &val);
if (error)
return error;
error = mutex_lock_interruptible(&ts->input->mutex);
if (error)
return error;
if (val)
ts->setup2 |= INV_Y;
else
ts->setup2 &= ~INV_Y;
if (ts->initialized)
error = i2c_smbus_write_byte_data(client, COMMON_SETUP2,
ts->setup2);
mutex_unlock(&ts->input->mutex);
return error ? error : count;
}
static DEVICE_ATTR_RW(swap_xy);
static DEVICE_ATTR_RW(inv_x);
static DEVICE_ATTR_RW(inv_y);
static struct attribute *rohm_ts_attrs[] = {
&dev_attr_swap_xy.attr,
&dev_attr_inv_x.attr,
&dev_attr_inv_y.attr,
NULL,
};
static const struct attribute_group rohm_ts_attr_group = {
.attrs = rohm_ts_attrs,
};
static int rohm_ts_device_init(struct i2c_client *client, u8 setup2)
{
struct device *dev = &client->dev;
int error;
disable_irq(client->irq);
/*
* Wait 200usec for reset
*/
udelay(200);
/* Release analog reset */
error = i2c_smbus_write_byte_data(client, SYSTEM,
ANALOG_POWER_ON | CPU_POWER_OFF);
if (error)
return error;
/* Waiting for the analog warm-up, max. 200usec */
udelay(200);
/* clear all interrupts */
error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, EX_WDAT, 0);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, COMMON_SETUP1, 0);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, COMMON_SETUP2, setup2);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, COMMON_SETUP3,
SEL_TBL_DEFAULT | EN_MULTI);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, THRESHOLD_GESTURE,
THRESHOLD_GESTURE_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, INTERVAL_TIME,
INTERVAL_TIME_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, CPU_FREQ, CPU_FREQ_10MHZ);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, PRM_SWOFF_TIME,
PRM_SWOFF_TIME_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, ADC_CTRL, ADC_DIV_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, ADC_WAIT, ADC_WAIT_DEFAULT);
if (error)
return error;
/*
* Panel setup, these values change with the panel.
*/
error = i2c_smbus_write_byte_data(client, STEP_X, STEP_X_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, STEP_Y, STEP_Y_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, OFFSET_X, OFFSET_X_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, OFFSET_Y, OFFSET_Y_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, THRESHOLD_TOUCH,
THRESHOLD_TOUCH_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, EVR_XY, EVR_XY_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, EVR_X, EVR_X_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, EVR_Y, EVR_Y_DEFAULT);
if (error)
return error;
/* Fixed value settings */
error = i2c_smbus_write_byte_data(client, CALIBRATION_ADJUST,
CALIBRATION_ADJUST_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, SWCONT, SWCONT_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, TEST1,
DUALTOUCH_STABILIZE_ON |
DUALTOUCH_REG_ON);
if (error)
return error;
error = rohm_ts_load_firmware(client, BU21023_FIRMWARE_NAME);
if (error) {
dev_err(dev, "failed to load firmware: %d\n", error);
return error;
}
/*
* Manual calibration results are not changed in same environment.
* If the force calibration is performed,
* the controller will not require calibration request interrupt
* when the typical values are set to the calibration registers.
*/
error = i2c_smbus_write_byte_data(client, CALIBRATION_REG1,
CALIBRATION_REG1_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, CALIBRATION_REG2,
CALIBRATION_REG2_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, CALIBRATION_REG3,
CALIBRATION_REG3_DEFAULT);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION,
FORCE_CALIBRATION_OFF);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION,
FORCE_CALIBRATION_ON);
if (error)
return error;
/* Clear all interrupts */
error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff);
if (error)
return error;
/* Enable coordinates update interrupt */
error = i2c_smbus_write_byte_data(client, INT_MASK,
CALIBRATION_DONE | SLEEP_OUT |
SLEEP_IN | PROGRAM_LOAD_DONE);
if (error)
return error;
error = i2c_smbus_write_byte_data(client, ERR_MASK,
PROGRAM_LOAD_ERR | CPU_TIMEOUT |
ADC_TIMEOUT);
if (error)
return error;
/* controller CPU power on */
error = i2c_smbus_write_byte_data(client, SYSTEM,
ANALOG_POWER_ON | CPU_POWER_ON);
enable_irq(client->irq);
return error;
}
static int rohm_ts_power_off(struct i2c_client *client)
{
int error;
error = i2c_smbus_write_byte_data(client, SYSTEM,
ANALOG_POWER_ON | CPU_POWER_OFF);
if (error) {
dev_err(&client->dev,
"failed to power off device CPU: %d\n", error);
return error;
}
error = i2c_smbus_write_byte_data(client, SYSTEM,
ANALOG_POWER_OFF | CPU_POWER_OFF);
if (error)
dev_err(&client->dev,
"failed to power off the device: %d\n", error);
return error;
}
static int rohm_ts_open(struct input_dev *input_dev)
{
struct rohm_ts_data *ts = input_get_drvdata(input_dev);
struct i2c_client *client = ts->client;
int error;
if (!ts->initialized) {
error = rohm_ts_device_init(client, ts->setup2);
if (error) {
dev_err(&client->dev,
"device initialization failed: %d\n", error);
return error;
}
ts->initialized = true;
}
return 0;
}
static void rohm_ts_close(struct input_dev *input_dev)
{
struct rohm_ts_data *ts = input_get_drvdata(input_dev);
rohm_ts_power_off(ts->client);
ts->initialized = false;
}
static int rohm_bu21023_i2c_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct rohm_ts_data *ts;
struct input_dev *input;
int error;
if (!client->irq) {
dev_err(dev, "IRQ is not assigned\n");
return -EINVAL;
}
if (!client->adapter->algo->master_xfer) {
dev_err(dev, "I2C level transfers not supported\n");
return -EOPNOTSUPP;
}
/* Turn off CPU just in case */
error = rohm_ts_power_off(client);
if (error)
return error;
ts = devm_kzalloc(dev, sizeof(struct rohm_ts_data), GFP_KERNEL);
if (!ts)
return -ENOMEM;
ts->client = client;
ts->setup2 = MAF_1SAMPLE;
i2c_set_clientdata(client, ts);
input = devm_input_allocate_device(dev);
if (!input)
return -ENOMEM;
input->name = BU21023_NAME;
input->id.bustype = BUS_I2C;
input->open = rohm_ts_open;
input->close = rohm_ts_close;
ts->input = input;
input_set_drvdata(input, ts);
input_set_abs_params(input, ABS_MT_POSITION_X,
ROHM_TS_ABS_X_MIN, ROHM_TS_ABS_X_MAX, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y,
ROHM_TS_ABS_Y_MIN, ROHM_TS_ABS_Y_MAX, 0, 0);
error = input_mt_init_slots(input, MAX_CONTACTS,
INPUT_MT_DIRECT | INPUT_MT_TRACK |
INPUT_MT_DROP_UNUSED);
if (error) {
dev_err(dev, "failed to multi touch slots initialization\n");
return error;
}
error = devm_request_threaded_irq(dev, client->irq,
NULL, rohm_ts_soft_irq,
IRQF_ONESHOT, client->name, ts);
if (error) {
dev_err(dev, "failed to request IRQ: %d\n", error);
return error;
}
error = input_register_device(input);
if (error) {
dev_err(dev, "failed to register input device: %d\n", error);
return error;
}
error = devm_device_add_group(dev, &rohm_ts_attr_group);
if (error) {
dev_err(dev, "failed to create sysfs group: %d\n", error);
return error;
}
return error;
}
static const struct i2c_device_id rohm_bu21023_i2c_id[] = {
{ BU21023_NAME, 0 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(i2c, rohm_bu21023_i2c_id);
static struct i2c_driver rohm_bu21023_i2c_driver = {
.driver = {
.name = BU21023_NAME,
},
.probe = rohm_bu21023_i2c_probe,
.id_table = rohm_bu21023_i2c_id,
};
module_i2c_driver(rohm_bu21023_i2c_driver);
MODULE_DESCRIPTION("ROHM BU21023/24 Touchscreen driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("ROHM Co., Ltd.");
|
linux-master
|
drivers/input/touchscreen/rohm_bu21023.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for AUO in-cell touchscreens
*
* Copyright (c) 2011 Heiko Stuebner <[email protected]>
*
* loosely based on auo_touch.c from Dell Streak vendor-kernel
*
* Copyright (c) 2008 QUALCOMM Incorporated.
* Copyright (c) 2008 QUALCOMM USA, INC.
*/
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/mutex.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/of.h>
#include <linux/property.h>
/*
* Coordinate calculation:
* X1 = X1_LSB + X1_MSB*256
* Y1 = Y1_LSB + Y1_MSB*256
* X2 = X2_LSB + X2_MSB*256
* Y2 = Y2_LSB + Y2_MSB*256
*/
#define AUO_PIXCIR_REG_X1_LSB 0x00
#define AUO_PIXCIR_REG_X1_MSB 0x01
#define AUO_PIXCIR_REG_Y1_LSB 0x02
#define AUO_PIXCIR_REG_Y1_MSB 0x03
#define AUO_PIXCIR_REG_X2_LSB 0x04
#define AUO_PIXCIR_REG_X2_MSB 0x05
#define AUO_PIXCIR_REG_Y2_LSB 0x06
#define AUO_PIXCIR_REG_Y2_MSB 0x07
#define AUO_PIXCIR_REG_STRENGTH 0x0d
#define AUO_PIXCIR_REG_STRENGTH_X1_LSB 0x0e
#define AUO_PIXCIR_REG_STRENGTH_X1_MSB 0x0f
#define AUO_PIXCIR_REG_RAW_DATA_X 0x2b
#define AUO_PIXCIR_REG_RAW_DATA_Y 0x4f
#define AUO_PIXCIR_REG_X_SENSITIVITY 0x6f
#define AUO_PIXCIR_REG_Y_SENSITIVITY 0x70
#define AUO_PIXCIR_REG_INT_SETTING 0x71
#define AUO_PIXCIR_REG_INT_WIDTH 0x72
#define AUO_PIXCIR_REG_POWER_MODE 0x73
#define AUO_PIXCIR_REG_VERSION 0x77
#define AUO_PIXCIR_REG_CALIBRATE 0x78
#define AUO_PIXCIR_REG_TOUCHAREA_X1 0x1e
#define AUO_PIXCIR_REG_TOUCHAREA_Y1 0x1f
#define AUO_PIXCIR_REG_TOUCHAREA_X2 0x20
#define AUO_PIXCIR_REG_TOUCHAREA_Y2 0x21
#define AUO_PIXCIR_REG_EEPROM_CALIB_X 0x42
#define AUO_PIXCIR_REG_EEPROM_CALIB_Y 0xad
#define AUO_PIXCIR_INT_TPNUM_MASK 0xe0
#define AUO_PIXCIR_INT_TPNUM_SHIFT 5
#define AUO_PIXCIR_INT_RELEASE (1 << 4)
#define AUO_PIXCIR_INT_ENABLE (1 << 3)
#define AUO_PIXCIR_INT_POL_HIGH (1 << 2)
/*
* Interrupt modes:
* periodical: interrupt is asserted periodicaly
* compare coordinates: interrupt is asserted when coordinates change
* indicate touch: interrupt is asserted during touch
*/
#define AUO_PIXCIR_INT_PERIODICAL 0x00
#define AUO_PIXCIR_INT_COMP_COORD 0x01
#define AUO_PIXCIR_INT_TOUCH_IND 0x02
#define AUO_PIXCIR_INT_MODE_MASK 0x03
/*
* Power modes:
* active: scan speed 60Hz
* sleep: scan speed 10Hz can be auto-activated, wakeup on 1st touch
* deep sleep: scan speed 1Hz can only be entered or left manually.
*/
#define AUO_PIXCIR_POWER_ACTIVE 0x00
#define AUO_PIXCIR_POWER_SLEEP 0x01
#define AUO_PIXCIR_POWER_DEEP_SLEEP 0x02
#define AUO_PIXCIR_POWER_MASK 0x03
#define AUO_PIXCIR_POWER_ALLOW_SLEEP (1 << 2)
#define AUO_PIXCIR_POWER_IDLE_TIME(ms) ((ms & 0xf) << 4)
#define AUO_PIXCIR_CALIBRATE 0x03
#define AUO_PIXCIR_EEPROM_CALIB_X_LEN 62
#define AUO_PIXCIR_EEPROM_CALIB_Y_LEN 36
#define AUO_PIXCIR_RAW_DATA_X_LEN 18
#define AUO_PIXCIR_RAW_DATA_Y_LEN 11
#define AUO_PIXCIR_STRENGTH_ENABLE (1 << 0)
/* Touchscreen absolute values */
#define AUO_PIXCIR_REPORT_POINTS 2
#define AUO_PIXCIR_MAX_AREA 0xff
#define AUO_PIXCIR_PENUP_TIMEOUT_MS 10
struct auo_pixcir_ts {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *gpio_int;
struct gpio_desc *gpio_rst;
char phys[32];
unsigned int x_max;
unsigned int y_max;
/* special handling for touch_indicate interrupt mode */
bool touch_ind_mode;
wait_queue_head_t wait;
bool stopped;
};
struct auo_point_t {
int coord_x;
int coord_y;
int area_major;
int area_minor;
int orientation;
};
static int auo_pixcir_collect_data(struct auo_pixcir_ts *ts,
struct auo_point_t *point)
{
struct i2c_client *client = ts->client;
uint8_t raw_coord[8];
uint8_t raw_area[4];
int i, ret;
/* touch coordinates */
ret = i2c_smbus_read_i2c_block_data(client, AUO_PIXCIR_REG_X1_LSB,
8, raw_coord);
if (ret < 0) {
dev_err(&client->dev, "failed to read coordinate, %d\n", ret);
return ret;
}
/* touch area */
ret = i2c_smbus_read_i2c_block_data(client, AUO_PIXCIR_REG_TOUCHAREA_X1,
4, raw_area);
if (ret < 0) {
dev_err(&client->dev, "could not read touch area, %d\n", ret);
return ret;
}
for (i = 0; i < AUO_PIXCIR_REPORT_POINTS; i++) {
point[i].coord_x =
raw_coord[4 * i + 1] << 8 | raw_coord[4 * i];
point[i].coord_y =
raw_coord[4 * i + 3] << 8 | raw_coord[4 * i + 2];
if (point[i].coord_x > ts->x_max ||
point[i].coord_y > ts->y_max) {
dev_warn(&client->dev, "coordinates (%d,%d) invalid\n",
point[i].coord_x, point[i].coord_y);
point[i].coord_x = point[i].coord_y = 0;
}
/* determine touch major, minor and orientation */
point[i].area_major = max(raw_area[2 * i], raw_area[2 * i + 1]);
point[i].area_minor = min(raw_area[2 * i], raw_area[2 * i + 1]);
point[i].orientation = raw_area[2 * i] > raw_area[2 * i + 1];
}
return 0;
}
static irqreturn_t auo_pixcir_interrupt(int irq, void *dev_id)
{
struct auo_pixcir_ts *ts = dev_id;
struct auo_point_t point[AUO_PIXCIR_REPORT_POINTS];
int i;
int ret;
int fingers = 0;
int abs = -1;
while (!ts->stopped) {
/* check for up event in touch touch_ind_mode */
if (ts->touch_ind_mode) {
if (gpiod_get_value_cansleep(ts->gpio_int) == 0) {
input_mt_sync(ts->input);
input_report_key(ts->input, BTN_TOUCH, 0);
input_sync(ts->input);
break;
}
}
ret = auo_pixcir_collect_data(ts, point);
if (ret < 0) {
/* we want to loop only in touch_ind_mode */
if (!ts->touch_ind_mode)
break;
wait_event_timeout(ts->wait, ts->stopped,
msecs_to_jiffies(AUO_PIXCIR_PENUP_TIMEOUT_MS));
continue;
}
for (i = 0; i < AUO_PIXCIR_REPORT_POINTS; i++) {
if (point[i].coord_x > 0 || point[i].coord_y > 0) {
input_report_abs(ts->input, ABS_MT_POSITION_X,
point[i].coord_x);
input_report_abs(ts->input, ABS_MT_POSITION_Y,
point[i].coord_y);
input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR,
point[i].area_major);
input_report_abs(ts->input, ABS_MT_TOUCH_MINOR,
point[i].area_minor);
input_report_abs(ts->input, ABS_MT_ORIENTATION,
point[i].orientation);
input_mt_sync(ts->input);
/* use first finger as source for singletouch */
if (fingers == 0)
abs = i;
/* number of touch points could also be queried
* via i2c but would require an additional call
*/
fingers++;
}
}
input_report_key(ts->input, BTN_TOUCH, fingers > 0);
if (abs > -1) {
input_report_abs(ts->input, ABS_X, point[abs].coord_x);
input_report_abs(ts->input, ABS_Y, point[abs].coord_y);
}
input_sync(ts->input);
/* we want to loop only in touch_ind_mode */
if (!ts->touch_ind_mode)
break;
wait_event_timeout(ts->wait, ts->stopped,
msecs_to_jiffies(AUO_PIXCIR_PENUP_TIMEOUT_MS));
}
return IRQ_HANDLED;
}
/*
* Set the power mode of the device.
* Valid modes are
* - AUO_PIXCIR_POWER_ACTIVE
* - AUO_PIXCIR_POWER_SLEEP - automatically left on first touch
* - AUO_PIXCIR_POWER_DEEP_SLEEP
*/
static int auo_pixcir_power_mode(struct auo_pixcir_ts *ts, int mode)
{
struct i2c_client *client = ts->client;
int ret;
ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_POWER_MODE);
if (ret < 0) {
dev_err(&client->dev, "unable to read reg %Xh, %d\n",
AUO_PIXCIR_REG_POWER_MODE, ret);
return ret;
}
ret &= ~AUO_PIXCIR_POWER_MASK;
ret |= mode;
ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_POWER_MODE, ret);
if (ret) {
dev_err(&client->dev, "unable to write reg %Xh, %d\n",
AUO_PIXCIR_REG_POWER_MODE, ret);
return ret;
}
return 0;
}
static int auo_pixcir_int_config(struct auo_pixcir_ts *ts, int int_setting)
{
struct i2c_client *client = ts->client;
int ret;
ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_INT_SETTING);
if (ret < 0) {
dev_err(&client->dev, "unable to read reg %Xh, %d\n",
AUO_PIXCIR_REG_INT_SETTING, ret);
return ret;
}
ret &= ~AUO_PIXCIR_INT_MODE_MASK;
ret |= int_setting;
ret |= AUO_PIXCIR_INT_POL_HIGH; /* always use high for interrupts */
ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_INT_SETTING,
ret);
if (ret < 0) {
dev_err(&client->dev, "unable to write reg %Xh, %d\n",
AUO_PIXCIR_REG_INT_SETTING, ret);
return ret;
}
ts->touch_ind_mode = int_setting == AUO_PIXCIR_INT_TOUCH_IND;
return 0;
}
/* control the generation of interrupts on the device side */
static int auo_pixcir_int_toggle(struct auo_pixcir_ts *ts, bool enable)
{
struct i2c_client *client = ts->client;
int ret;
ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_INT_SETTING);
if (ret < 0) {
dev_err(&client->dev, "unable to read reg %Xh, %d\n",
AUO_PIXCIR_REG_INT_SETTING, ret);
return ret;
}
if (enable)
ret |= AUO_PIXCIR_INT_ENABLE;
else
ret &= ~AUO_PIXCIR_INT_ENABLE;
ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_INT_SETTING,
ret);
if (ret < 0) {
dev_err(&client->dev, "unable to write reg %Xh, %d\n",
AUO_PIXCIR_REG_INT_SETTING, ret);
return ret;
}
return 0;
}
static int auo_pixcir_start(struct auo_pixcir_ts *ts)
{
struct i2c_client *client = ts->client;
int ret;
ret = auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_ACTIVE);
if (ret < 0) {
dev_err(&client->dev, "could not set power mode, %d\n",
ret);
return ret;
}
ts->stopped = false;
mb();
enable_irq(client->irq);
ret = auo_pixcir_int_toggle(ts, 1);
if (ret < 0) {
dev_err(&client->dev, "could not enable interrupt, %d\n",
ret);
disable_irq(client->irq);
return ret;
}
return 0;
}
static int auo_pixcir_stop(struct auo_pixcir_ts *ts)
{
struct i2c_client *client = ts->client;
int ret;
ret = auo_pixcir_int_toggle(ts, 0);
if (ret < 0) {
dev_err(&client->dev, "could not disable interrupt, %d\n",
ret);
return ret;
}
/* disable receiving of interrupts */
disable_irq(client->irq);
ts->stopped = true;
mb();
wake_up(&ts->wait);
return auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_DEEP_SLEEP);
}
static int auo_pixcir_input_open(struct input_dev *dev)
{
struct auo_pixcir_ts *ts = input_get_drvdata(dev);
return auo_pixcir_start(ts);
}
static void auo_pixcir_input_close(struct input_dev *dev)
{
struct auo_pixcir_ts *ts = input_get_drvdata(dev);
auo_pixcir_stop(ts);
}
static int auo_pixcir_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct auo_pixcir_ts *ts = i2c_get_clientdata(client);
struct input_dev *input = ts->input;
int ret = 0;
mutex_lock(&input->mutex);
/* when configured as wakeup source, device should always wake system
* therefore start device if necessary
*/
if (device_may_wakeup(&client->dev)) {
/* need to start device if not open, to be wakeup source */
if (!input_device_enabled(input)) {
ret = auo_pixcir_start(ts);
if (ret)
goto unlock;
}
enable_irq_wake(client->irq);
ret = auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_SLEEP);
} else if (input_device_enabled(input)) {
ret = auo_pixcir_stop(ts);
}
unlock:
mutex_unlock(&input->mutex);
return ret;
}
static int auo_pixcir_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct auo_pixcir_ts *ts = i2c_get_clientdata(client);
struct input_dev *input = ts->input;
int ret = 0;
mutex_lock(&input->mutex);
if (device_may_wakeup(&client->dev)) {
disable_irq_wake(client->irq);
/* need to stop device if it was not open on suspend */
if (!input_device_enabled(input)) {
ret = auo_pixcir_stop(ts);
if (ret)
goto unlock;
}
/* device wakes automatically from SLEEP */
} else if (input_device_enabled(input)) {
ret = auo_pixcir_start(ts);
}
unlock:
mutex_unlock(&input->mutex);
return ret;
}
static DEFINE_SIMPLE_DEV_PM_OPS(auo_pixcir_pm_ops,
auo_pixcir_suspend, auo_pixcir_resume);
static void auo_pixcir_reset(void *data)
{
struct auo_pixcir_ts *ts = data;
gpiod_set_value_cansleep(ts->gpio_rst, 1);
}
static int auo_pixcir_probe(struct i2c_client *client)
{
struct auo_pixcir_ts *ts;
struct input_dev *input_dev;
int version;
int error;
ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
input_dev = devm_input_allocate_device(&client->dev);
if (!input_dev) {
dev_err(&client->dev, "could not allocate input device\n");
return -ENOMEM;
}
ts->client = client;
ts->input = input_dev;
ts->touch_ind_mode = 0;
ts->stopped = true;
init_waitqueue_head(&ts->wait);
snprintf(ts->phys, sizeof(ts->phys),
"%s/input0", dev_name(&client->dev));
if (device_property_read_u32(&client->dev, "x-size", &ts->x_max)) {
dev_err(&client->dev, "failed to get x-size property\n");
return -EINVAL;
}
if (device_property_read_u32(&client->dev, "y-size", &ts->y_max)) {
dev_err(&client->dev, "failed to get y-size property\n");
return -EINVAL;
}
input_dev->name = "AUO-Pixcir touchscreen";
input_dev->phys = ts->phys;
input_dev->id.bustype = BUS_I2C;
input_dev->open = auo_pixcir_input_open;
input_dev->close = auo_pixcir_input_close;
__set_bit(EV_ABS, input_dev->evbit);
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(BTN_TOUCH, input_dev->keybit);
/* For single touch */
input_set_abs_params(input_dev, ABS_X, 0, ts->x_max, 0, 0);
input_set_abs_params(input_dev, ABS_Y, 0, ts->y_max, 0, 0);
/* For multi touch */
input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, ts->x_max, 0, 0);
input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, ts->y_max, 0, 0);
input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
0, AUO_PIXCIR_MAX_AREA, 0, 0);
input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR,
0, AUO_PIXCIR_MAX_AREA, 0, 0);
input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0);
input_set_drvdata(ts->input, ts);
ts->gpio_int = devm_gpiod_get_index(&client->dev, NULL, 0, GPIOD_IN);
error = PTR_ERR_OR_ZERO(ts->gpio_int);
if (error) {
dev_err(&client->dev,
"request of int gpio failed: %d\n", error);
return error;
}
gpiod_set_consumer_name(ts->gpio_int, "auo_pixcir_ts_int");
/* Take the chip out of reset */
ts->gpio_rst = devm_gpiod_get_index(&client->dev, NULL, 1,
GPIOD_OUT_LOW);
error = PTR_ERR_OR_ZERO(ts->gpio_rst);
if (error) {
dev_err(&client->dev,
"request of reset gpio failed: %d\n", error);
return error;
}
gpiod_set_consumer_name(ts->gpio_rst, "auo_pixcir_ts_rst");
error = devm_add_action_or_reset(&client->dev, auo_pixcir_reset, ts);
if (error) {
dev_err(&client->dev, "failed to register reset action, %d\n",
error);
return error;
}
msleep(200);
version = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_VERSION);
if (version < 0) {
error = version;
return error;
}
dev_info(&client->dev, "firmware version 0x%X\n", version);
/* default to asserting the interrupt when the screen is touched */
error = auo_pixcir_int_config(ts, AUO_PIXCIR_INT_TOUCH_IND);
if (error)
return error;
error = devm_request_threaded_irq(&client->dev, client->irq,
NULL, auo_pixcir_interrupt,
IRQF_ONESHOT,
input_dev->name, ts);
if (error) {
dev_err(&client->dev, "irq %d requested failed, %d\n",
client->irq, error);
return error;
}
/* stop device and put it into deep sleep until it is opened */
error = auo_pixcir_stop(ts);
if (error)
return error;
error = input_register_device(input_dev);
if (error) {
dev_err(&client->dev, "could not register input device, %d\n",
error);
return error;
}
i2c_set_clientdata(client, ts);
return 0;
}
static const struct i2c_device_id auo_pixcir_idtable[] = {
{ "auo_pixcir_ts", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, auo_pixcir_idtable);
#ifdef CONFIG_OF
static const struct of_device_id auo_pixcir_ts_dt_idtable[] = {
{ .compatible = "auo,auo_pixcir_ts" },
{},
};
MODULE_DEVICE_TABLE(of, auo_pixcir_ts_dt_idtable);
#endif
static struct i2c_driver auo_pixcir_driver = {
.driver = {
.name = "auo_pixcir_ts",
.pm = pm_sleep_ptr(&auo_pixcir_pm_ops),
.of_match_table = of_match_ptr(auo_pixcir_ts_dt_idtable),
},
.probe = auo_pixcir_probe,
.id_table = auo_pixcir_idtable,
};
module_i2c_driver(auo_pixcir_driver);
MODULE_DESCRIPTION("AUO-PIXCIR touchscreen driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Heiko Stuebner <[email protected]>");
|
linux-master
|
drivers/input/touchscreen/auo-pixcir-ts.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Freescale MXS LRADC touchscreen driver
*
* Copyright (c) 2012 DENX Software Engineering, GmbH.
* Copyright (c) 2017 Ksenija Stanojevic <[email protected]>
*
* Authors:
* Marek Vasut <[email protected]>
* Ksenija Stanojevic <[email protected]>
*/
#include <linux/device.h>
#include <linux/err.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/mfd/core.h>
#include <linux/mfd/mxs-lradc.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
static const char * const mxs_lradc_ts_irq_names[] = {
"mxs-lradc-touchscreen",
"mxs-lradc-channel6",
"mxs-lradc-channel7",
};
/*
* Touchscreen handling
*/
enum mxs_lradc_ts_plate {
LRADC_TOUCH = 0,
LRADC_SAMPLE_X,
LRADC_SAMPLE_Y,
LRADC_SAMPLE_PRESSURE,
LRADC_SAMPLE_VALID,
};
struct mxs_lradc_ts {
struct mxs_lradc *lradc;
struct device *dev;
void __iomem *base;
/*
* When the touchscreen is enabled, we give it two private virtual
* channels: #6 and #7. This means that only 6 virtual channels (instead
* of 8) will be available for buffered capture.
*/
#define TOUCHSCREEN_VCHANNEL1 7
#define TOUCHSCREEN_VCHANNEL2 6
struct input_dev *ts_input;
enum mxs_lradc_ts_plate cur_plate; /* state machine */
bool ts_valid;
unsigned int ts_x_pos;
unsigned int ts_y_pos;
unsigned int ts_pressure;
/* handle touchscreen's physical behaviour */
/* samples per coordinate */
unsigned int over_sample_cnt;
/* time clocks between samples */
unsigned int over_sample_delay;
/* time in clocks to wait after the plates where switched */
unsigned int settling_delay;
spinlock_t lock;
};
struct state_info {
u32 mask;
u32 bit;
u32 x_plate;
u32 y_plate;
u32 pressure;
};
static struct state_info info[] = {
{LRADC_CTRL0_MX23_PLATE_MASK, LRADC_CTRL0_MX23_TOUCH_DETECT_ENABLE,
LRADC_CTRL0_MX23_XP | LRADC_CTRL0_MX23_XM,
LRADC_CTRL0_MX23_YP | LRADC_CTRL0_MX23_YM,
LRADC_CTRL0_MX23_YP | LRADC_CTRL0_MX23_XM},
{LRADC_CTRL0_MX28_PLATE_MASK, LRADC_CTRL0_MX28_TOUCH_DETECT_ENABLE,
LRADC_CTRL0_MX28_XPPSW | LRADC_CTRL0_MX28_XNNSW,
LRADC_CTRL0_MX28_YPPSW | LRADC_CTRL0_MX28_YNNSW,
LRADC_CTRL0_MX28_YPPSW | LRADC_CTRL0_MX28_XNNSW}
};
static bool mxs_lradc_check_touch_event(struct mxs_lradc_ts *ts)
{
return !!(readl(ts->base + LRADC_STATUS) &
LRADC_STATUS_TOUCH_DETECT_RAW);
}
static void mxs_lradc_map_ts_channel(struct mxs_lradc_ts *ts, unsigned int vch,
unsigned int ch)
{
writel(LRADC_CTRL4_LRADCSELECT_MASK(vch),
ts->base + LRADC_CTRL4 + STMP_OFFSET_REG_CLR);
writel(LRADC_CTRL4_LRADCSELECT(vch, ch),
ts->base + LRADC_CTRL4 + STMP_OFFSET_REG_SET);
}
static void mxs_lradc_setup_ts_channel(struct mxs_lradc_ts *ts, unsigned int ch)
{
/*
* prepare for oversampling conversion
*
* from the datasheet:
* "The ACCUMULATE bit in the appropriate channel register
* HW_LRADC_CHn must be set to 1 if NUM_SAMPLES is greater then 0;
* otherwise, the IRQs will not fire."
*/
writel(LRADC_CH_ACCUMULATE |
LRADC_CH_NUM_SAMPLES(ts->over_sample_cnt - 1),
ts->base + LRADC_CH(ch));
/* from the datasheet:
* "Software must clear this register in preparation for a
* multi-cycle accumulation.
*/
writel(LRADC_CH_VALUE_MASK,
ts->base + LRADC_CH(ch) + STMP_OFFSET_REG_CLR);
/*
* prepare the delay/loop unit according to the oversampling count
*
* from the datasheet:
* "The DELAY fields in HW_LRADC_DELAY0, HW_LRADC_DELAY1,
* HW_LRADC_DELAY2, and HW_LRADC_DELAY3 must be non-zero; otherwise,
* the LRADC will not trigger the delay group."
*/
writel(LRADC_DELAY_TRIGGER(1 << ch) | LRADC_DELAY_TRIGGER_DELAYS(0) |
LRADC_DELAY_LOOP(ts->over_sample_cnt - 1) |
LRADC_DELAY_DELAY(ts->over_sample_delay - 1),
ts->base + LRADC_DELAY(3));
writel(LRADC_CTRL1_LRADC_IRQ(ch),
ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR);
/*
* after changing the touchscreen plates setting
* the signals need some initial time to settle. Start the
* SoC's delay unit and start the conversion later
* and automatically.
*/
writel(LRADC_DELAY_TRIGGER(0) | LRADC_DELAY_TRIGGER_DELAYS(BIT(3)) |
LRADC_DELAY_KICK | LRADC_DELAY_DELAY(ts->settling_delay),
ts->base + LRADC_DELAY(2));
}
/*
* Pressure detection is special:
* We want to do both required measurements for the pressure detection in
* one turn. Use the hardware features to chain both conversions and let the
* hardware report one interrupt if both conversions are done
*/
static void mxs_lradc_setup_ts_pressure(struct mxs_lradc_ts *ts,
unsigned int ch1, unsigned int ch2)
{
u32 reg;
/*
* prepare for oversampling conversion
*
* from the datasheet:
* "The ACCUMULATE bit in the appropriate channel register
* HW_LRADC_CHn must be set to 1 if NUM_SAMPLES is greater then 0;
* otherwise, the IRQs will not fire."
*/
reg = LRADC_CH_ACCUMULATE |
LRADC_CH_NUM_SAMPLES(ts->over_sample_cnt - 1);
writel(reg, ts->base + LRADC_CH(ch1));
writel(reg, ts->base + LRADC_CH(ch2));
/* from the datasheet:
* "Software must clear this register in preparation for a
* multi-cycle accumulation.
*/
writel(LRADC_CH_VALUE_MASK,
ts->base + LRADC_CH(ch1) + STMP_OFFSET_REG_CLR);
writel(LRADC_CH_VALUE_MASK,
ts->base + LRADC_CH(ch2) + STMP_OFFSET_REG_CLR);
/* prepare the delay/loop unit according to the oversampling count */
writel(LRADC_DELAY_TRIGGER(1 << ch1) | LRADC_DELAY_TRIGGER(1 << ch2) |
LRADC_DELAY_TRIGGER_DELAYS(0) |
LRADC_DELAY_LOOP(ts->over_sample_cnt - 1) |
LRADC_DELAY_DELAY(ts->over_sample_delay - 1),
ts->base + LRADC_DELAY(3));
writel(LRADC_CTRL1_LRADC_IRQ(ch2),
ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR);
/*
* after changing the touchscreen plates setting
* the signals need some initial time to settle. Start the
* SoC's delay unit and start the conversion later
* and automatically.
*/
writel(LRADC_DELAY_TRIGGER(0) | LRADC_DELAY_TRIGGER_DELAYS(BIT(3)) |
LRADC_DELAY_KICK | LRADC_DELAY_DELAY(ts->settling_delay),
ts->base + LRADC_DELAY(2));
}
static unsigned int mxs_lradc_ts_read_raw_channel(struct mxs_lradc_ts *ts,
unsigned int channel)
{
u32 reg;
unsigned int num_samples, val;
reg = readl(ts->base + LRADC_CH(channel));
if (reg & LRADC_CH_ACCUMULATE)
num_samples = ts->over_sample_cnt;
else
num_samples = 1;
val = (reg & LRADC_CH_VALUE_MASK) >> LRADC_CH_VALUE_OFFSET;
return val / num_samples;
}
static unsigned int mxs_lradc_read_ts_pressure(struct mxs_lradc_ts *ts,
unsigned int ch1, unsigned int ch2)
{
u32 reg, mask;
unsigned int pressure, m1, m2;
mask = LRADC_CTRL1_LRADC_IRQ(ch1) | LRADC_CTRL1_LRADC_IRQ(ch2);
reg = readl(ts->base + LRADC_CTRL1) & mask;
while (reg != mask) {
reg = readl(ts->base + LRADC_CTRL1) & mask;
dev_dbg(ts->dev, "One channel is still busy: %X\n", reg);
}
m1 = mxs_lradc_ts_read_raw_channel(ts, ch1);
m2 = mxs_lradc_ts_read_raw_channel(ts, ch2);
if (m2 == 0) {
dev_warn(ts->dev, "Cannot calculate pressure\n");
return 1 << (LRADC_RESOLUTION - 1);
}
/* simply scale the value from 0 ... max ADC resolution */
pressure = m1;
pressure *= (1 << LRADC_RESOLUTION);
pressure /= m2;
dev_dbg(ts->dev, "Pressure = %u\n", pressure);
return pressure;
}
#define TS_CH_XP 2
#define TS_CH_YP 3
#define TS_CH_XM 4
#define TS_CH_YM 5
/*
* YP(open)--+-------------+
* | |--+
* | | |
* YM(-)--+-------------+ |
* +--------------+
* | |
* XP(weak+) XM(open)
*
* "weak+" means 200k Ohm VDDIO
* (-) means GND
*/
static void mxs_lradc_setup_touch_detection(struct mxs_lradc_ts *ts)
{
struct mxs_lradc *lradc = ts->lradc;
/*
* In order to detect a touch event the 'touch detect enable' bit
* enables:
* - a weak pullup to the X+ connector
* - a strong ground at the Y- connector
*/
writel(info[lradc->soc].mask,
ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_CLR);
writel(info[lradc->soc].bit,
ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_SET);
}
/*
* YP(meas)--+-------------+
* | |--+
* | | |
* YM(open)--+-------------+ |
* +--------------+
* | |
* XP(+) XM(-)
*
* (+) means here 1.85 V
* (-) means here GND
*/
static void mxs_lradc_prepare_x_pos(struct mxs_lradc_ts *ts)
{
struct mxs_lradc *lradc = ts->lradc;
writel(info[lradc->soc].mask,
ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_CLR);
writel(info[lradc->soc].x_plate,
ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_SET);
ts->cur_plate = LRADC_SAMPLE_X;
mxs_lradc_map_ts_channel(ts, TOUCHSCREEN_VCHANNEL1, TS_CH_YP);
mxs_lradc_setup_ts_channel(ts, TOUCHSCREEN_VCHANNEL1);
}
/*
* YP(+)--+-------------+
* | |--+
* | | |
* YM(-)--+-------------+ |
* +--------------+
* | |
* XP(open) XM(meas)
*
* (+) means here 1.85 V
* (-) means here GND
*/
static void mxs_lradc_prepare_y_pos(struct mxs_lradc_ts *ts)
{
struct mxs_lradc *lradc = ts->lradc;
writel(info[lradc->soc].mask,
ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_CLR);
writel(info[lradc->soc].y_plate,
ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_SET);
ts->cur_plate = LRADC_SAMPLE_Y;
mxs_lradc_map_ts_channel(ts, TOUCHSCREEN_VCHANNEL1, TS_CH_XM);
mxs_lradc_setup_ts_channel(ts, TOUCHSCREEN_VCHANNEL1);
}
/*
* YP(+)--+-------------+
* | |--+
* | | |
* YM(meas)--+-------------+ |
* +--------------+
* | |
* XP(meas) XM(-)
*
* (+) means here 1.85 V
* (-) means here GND
*/
static void mxs_lradc_prepare_pressure(struct mxs_lradc_ts *ts)
{
struct mxs_lradc *lradc = ts->lradc;
writel(info[lradc->soc].mask,
ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_CLR);
writel(info[lradc->soc].pressure,
ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_SET);
ts->cur_plate = LRADC_SAMPLE_PRESSURE;
mxs_lradc_map_ts_channel(ts, TOUCHSCREEN_VCHANNEL1, TS_CH_YM);
mxs_lradc_map_ts_channel(ts, TOUCHSCREEN_VCHANNEL2, TS_CH_XP);
mxs_lradc_setup_ts_pressure(ts, TOUCHSCREEN_VCHANNEL2,
TOUCHSCREEN_VCHANNEL1);
}
static void mxs_lradc_enable_touch_detection(struct mxs_lradc_ts *ts)
{
mxs_lradc_setup_touch_detection(ts);
ts->cur_plate = LRADC_TOUCH;
writel(LRADC_CTRL1_TOUCH_DETECT_IRQ | LRADC_CTRL1_TOUCH_DETECT_IRQ_EN,
ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR);
writel(LRADC_CTRL1_TOUCH_DETECT_IRQ_EN,
ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_SET);
}
static void mxs_lradc_start_touch_event(struct mxs_lradc_ts *ts)
{
writel(LRADC_CTRL1_TOUCH_DETECT_IRQ_EN,
ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR);
writel(LRADC_CTRL1_LRADC_IRQ_EN(TOUCHSCREEN_VCHANNEL1),
ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_SET);
/*
* start with the Y-pos, because it uses nearly the same plate
* settings like the touch detection
*/
mxs_lradc_prepare_y_pos(ts);
}
static void mxs_lradc_report_ts_event(struct mxs_lradc_ts *ts)
{
input_report_abs(ts->ts_input, ABS_X, ts->ts_x_pos);
input_report_abs(ts->ts_input, ABS_Y, ts->ts_y_pos);
input_report_abs(ts->ts_input, ABS_PRESSURE, ts->ts_pressure);
input_report_key(ts->ts_input, BTN_TOUCH, 1);
input_sync(ts->ts_input);
}
static void mxs_lradc_complete_touch_event(struct mxs_lradc_ts *ts)
{
mxs_lradc_setup_touch_detection(ts);
ts->cur_plate = LRADC_SAMPLE_VALID;
/*
* start a dummy conversion to burn time to settle the signals
* note: we are not interested in the conversion's value
*/
writel(0, ts->base + LRADC_CH(TOUCHSCREEN_VCHANNEL1));
writel(LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL1) |
LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL2),
ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR);
writel(LRADC_DELAY_TRIGGER(1 << TOUCHSCREEN_VCHANNEL1) |
LRADC_DELAY_KICK | LRADC_DELAY_DELAY(10),
ts->base + LRADC_DELAY(2));
}
/*
* in order to avoid false measurements, report only samples where
* the surface is still touched after the position measurement
*/
static void mxs_lradc_finish_touch_event(struct mxs_lradc_ts *ts, bool valid)
{
/* if it is still touched, report the sample */
if (valid && mxs_lradc_check_touch_event(ts)) {
ts->ts_valid = true;
mxs_lradc_report_ts_event(ts);
}
/* if it is even still touched, continue with the next measurement */
if (mxs_lradc_check_touch_event(ts)) {
mxs_lradc_prepare_y_pos(ts);
return;
}
if (ts->ts_valid) {
/* signal the release */
ts->ts_valid = false;
input_report_key(ts->ts_input, BTN_TOUCH, 0);
input_sync(ts->ts_input);
}
/* if it is released, wait for the next touch via IRQ */
ts->cur_plate = LRADC_TOUCH;
writel(0, ts->base + LRADC_DELAY(2));
writel(0, ts->base + LRADC_DELAY(3));
writel(LRADC_CTRL1_TOUCH_DETECT_IRQ |
LRADC_CTRL1_LRADC_IRQ_EN(TOUCHSCREEN_VCHANNEL1) |
LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL1),
ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR);
writel(LRADC_CTRL1_TOUCH_DETECT_IRQ_EN,
ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_SET);
}
/* touchscreen's state machine */
static void mxs_lradc_handle_touch(struct mxs_lradc_ts *ts)
{
switch (ts->cur_plate) {
case LRADC_TOUCH:
if (mxs_lradc_check_touch_event(ts))
mxs_lradc_start_touch_event(ts);
writel(LRADC_CTRL1_TOUCH_DETECT_IRQ,
ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR);
return;
case LRADC_SAMPLE_Y:
ts->ts_y_pos =
mxs_lradc_ts_read_raw_channel(ts, TOUCHSCREEN_VCHANNEL1);
mxs_lradc_prepare_x_pos(ts);
return;
case LRADC_SAMPLE_X:
ts->ts_x_pos =
mxs_lradc_ts_read_raw_channel(ts, TOUCHSCREEN_VCHANNEL1);
mxs_lradc_prepare_pressure(ts);
return;
case LRADC_SAMPLE_PRESSURE:
ts->ts_pressure =
mxs_lradc_read_ts_pressure(ts,
TOUCHSCREEN_VCHANNEL2,
TOUCHSCREEN_VCHANNEL1);
mxs_lradc_complete_touch_event(ts);
return;
case LRADC_SAMPLE_VALID:
mxs_lradc_finish_touch_event(ts, 1);
break;
}
}
/* IRQ Handling */
static irqreturn_t mxs_lradc_ts_handle_irq(int irq, void *data)
{
struct mxs_lradc_ts *ts = data;
struct mxs_lradc *lradc = ts->lradc;
unsigned long reg = readl(ts->base + LRADC_CTRL1);
u32 clr_irq = mxs_lradc_irq_mask(lradc);
const u32 ts_irq_mask =
LRADC_CTRL1_TOUCH_DETECT_IRQ |
LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL1) |
LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL2);
unsigned long flags;
if (!(reg & mxs_lradc_irq_mask(lradc)))
return IRQ_NONE;
if (reg & ts_irq_mask) {
spin_lock_irqsave(&ts->lock, flags);
mxs_lradc_handle_touch(ts);
spin_unlock_irqrestore(&ts->lock, flags);
/* Make sure we don't clear the next conversion's interrupt. */
clr_irq &= ~(LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL1) |
LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL2));
writel(reg & clr_irq,
ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR);
}
return IRQ_HANDLED;
}
static int mxs_lradc_ts_open(struct input_dev *dev)
{
struct mxs_lradc_ts *ts = input_get_drvdata(dev);
/* Enable the touch-detect circuitry. */
mxs_lradc_enable_touch_detection(ts);
return 0;
}
static void mxs_lradc_ts_stop(struct mxs_lradc_ts *ts)
{
int i;
struct mxs_lradc *lradc = ts->lradc;
/* stop all interrupts from firing */
writel(LRADC_CTRL1_TOUCH_DETECT_IRQ_EN |
LRADC_CTRL1_LRADC_IRQ_EN(TOUCHSCREEN_VCHANNEL1) |
LRADC_CTRL1_LRADC_IRQ_EN(TOUCHSCREEN_VCHANNEL2),
ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR);
/* Power-down touchscreen touch-detect circuitry. */
writel(info[lradc->soc].mask,
ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_CLR);
writel(lradc->buffer_vchans << LRADC_CTRL1_LRADC_IRQ_EN_OFFSET,
ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR);
for (i = 1; i < LRADC_MAX_DELAY_CHANS; i++)
writel(0, ts->base + LRADC_DELAY(i));
}
static void mxs_lradc_ts_close(struct input_dev *dev)
{
struct mxs_lradc_ts *ts = input_get_drvdata(dev);
mxs_lradc_ts_stop(ts);
}
static void mxs_lradc_ts_hw_init(struct mxs_lradc_ts *ts)
{
struct mxs_lradc *lradc = ts->lradc;
/* Configure the touchscreen type */
if (lradc->soc == IMX28_LRADC) {
writel(LRADC_CTRL0_MX28_TOUCH_SCREEN_TYPE,
ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_CLR);
if (lradc->touchscreen_wire == MXS_LRADC_TOUCHSCREEN_5WIRE)
writel(LRADC_CTRL0_MX28_TOUCH_SCREEN_TYPE,
ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_SET);
}
}
static int mxs_lradc_ts_register(struct mxs_lradc_ts *ts)
{
struct input_dev *input;
struct device *dev = ts->dev;
input = devm_input_allocate_device(dev);
if (!input)
return -ENOMEM;
input->name = "mxs-lradc-ts";
input->id.bustype = BUS_HOST;
input->open = mxs_lradc_ts_open;
input->close = mxs_lradc_ts_close;
__set_bit(INPUT_PROP_DIRECT, input->propbit);
input_set_capability(input, EV_KEY, BTN_TOUCH);
input_set_abs_params(input, ABS_X, 0, LRADC_SINGLE_SAMPLE_MASK, 0, 0);
input_set_abs_params(input, ABS_Y, 0, LRADC_SINGLE_SAMPLE_MASK, 0, 0);
input_set_abs_params(input, ABS_PRESSURE, 0, LRADC_SINGLE_SAMPLE_MASK,
0, 0);
ts->ts_input = input;
input_set_drvdata(input, ts);
return input_register_device(input);
}
static int mxs_lradc_ts_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->parent->of_node;
struct mxs_lradc *lradc = dev_get_drvdata(dev->parent);
struct mxs_lradc_ts *ts;
int ret, irq, virq, i;
u32 ts_wires = 0, adapt;
ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
platform_set_drvdata(pdev, ts);
ts->lradc = lradc;
ts->dev = dev;
spin_lock_init(&ts->lock);
ts->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(ts->base))
return PTR_ERR(ts->base);
ret = of_property_read_u32(node, "fsl,lradc-touchscreen-wires",
&ts_wires);
if (ret)
return ret;
if (of_property_read_u32(node, "fsl,ave-ctrl", &adapt)) {
ts->over_sample_cnt = 4;
} else {
if (adapt >= 1 && adapt <= 32) {
ts->over_sample_cnt = adapt;
} else {
dev_err(ts->dev, "Invalid sample count (%u)\n",
adapt);
return -EINVAL;
}
}
if (of_property_read_u32(node, "fsl,ave-delay", &adapt)) {
ts->over_sample_delay = 2;
} else {
if (adapt >= 2 && adapt <= LRADC_DELAY_DELAY_MASK + 1) {
ts->over_sample_delay = adapt;
} else {
dev_err(ts->dev, "Invalid sample delay (%u)\n",
adapt);
return -EINVAL;
}
}
if (of_property_read_u32(node, "fsl,settling", &adapt)) {
ts->settling_delay = 10;
} else {
if (adapt >= 1 && adapt <= LRADC_DELAY_DELAY_MASK) {
ts->settling_delay = adapt;
} else {
dev_err(ts->dev, "Invalid settling delay (%u)\n",
adapt);
return -EINVAL;
}
}
ret = stmp_reset_block(ts->base);
if (ret)
return ret;
mxs_lradc_ts_hw_init(ts);
for (i = 0; i < 3; i++) {
irq = platform_get_irq_byname(pdev, mxs_lradc_ts_irq_names[i]);
if (irq < 0)
return irq;
virq = irq_of_parse_and_map(node, irq);
mxs_lradc_ts_stop(ts);
ret = devm_request_irq(dev, virq,
mxs_lradc_ts_handle_irq,
0, mxs_lradc_ts_irq_names[i], ts);
if (ret)
return ret;
}
return mxs_lradc_ts_register(ts);
}
static struct platform_driver mxs_lradc_ts_driver = {
.driver = {
.name = "mxs-lradc-ts",
},
.probe = mxs_lradc_ts_probe,
};
module_platform_driver(mxs_lradc_ts_driver);
MODULE_AUTHOR("Marek Vasut <[email protected]>");
MODULE_DESCRIPTION("Freescale MXS LRADC touchscreen driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:mxs-lradc-ts");
|
linux-master
|
drivers/input/touchscreen/mxs-lradc-ts.c
|
// SPDX-License-Identifier: GPL-2.0
// STMicroelectronics FTS Touchscreen device driver
//
// Copyright (c) 2017 Samsung Electronics Co., Ltd.
// Copyright (c) 2017 Andi Shyti <[email protected]>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
/* I2C commands */
#define STMFTS_READ_INFO 0x80
#define STMFTS_READ_STATUS 0x84
#define STMFTS_READ_ONE_EVENT 0x85
#define STMFTS_READ_ALL_EVENT 0x86
#define STMFTS_LATEST_EVENT 0x87
#define STMFTS_SLEEP_IN 0x90
#define STMFTS_SLEEP_OUT 0x91
#define STMFTS_MS_MT_SENSE_OFF 0x92
#define STMFTS_MS_MT_SENSE_ON 0x93
#define STMFTS_SS_HOVER_SENSE_OFF 0x94
#define STMFTS_SS_HOVER_SENSE_ON 0x95
#define STMFTS_MS_KEY_SENSE_OFF 0x9a
#define STMFTS_MS_KEY_SENSE_ON 0x9b
#define STMFTS_SYSTEM_RESET 0xa0
#define STMFTS_CLEAR_EVENT_STACK 0xa1
#define STMFTS_FULL_FORCE_CALIBRATION 0xa2
#define STMFTS_MS_CX_TUNING 0xa3
#define STMFTS_SS_CX_TUNING 0xa4
/* events */
#define STMFTS_EV_NO_EVENT 0x00
#define STMFTS_EV_MULTI_TOUCH_DETECTED 0x02
#define STMFTS_EV_MULTI_TOUCH_ENTER 0x03
#define STMFTS_EV_MULTI_TOUCH_LEAVE 0x04
#define STMFTS_EV_MULTI_TOUCH_MOTION 0x05
#define STMFTS_EV_HOVER_ENTER 0x07
#define STMFTS_EV_HOVER_LEAVE 0x08
#define STMFTS_EV_HOVER_MOTION 0x09
#define STMFTS_EV_KEY_STATUS 0x0e
#define STMFTS_EV_ERROR 0x0f
#define STMFTS_EV_CONTROLLER_READY 0x10
#define STMFTS_EV_SLEEP_OUT_CONTROLLER_READY 0x11
#define STMFTS_EV_STATUS 0x16
#define STMFTS_EV_DEBUG 0xdb
/* multi touch related event masks */
#define STMFTS_MASK_EVENT_ID 0x0f
#define STMFTS_MASK_TOUCH_ID 0xf0
#define STMFTS_MASK_LEFT_EVENT 0x0f
#define STMFTS_MASK_X_MSB 0x0f
#define STMFTS_MASK_Y_LSB 0xf0
/* key related event masks */
#define STMFTS_MASK_KEY_NO_TOUCH 0x00
#define STMFTS_MASK_KEY_MENU 0x01
#define STMFTS_MASK_KEY_BACK 0x02
#define STMFTS_EVENT_SIZE 8
#define STMFTS_STACK_DEPTH 32
#define STMFTS_DATA_MAX_SIZE (STMFTS_EVENT_SIZE * STMFTS_STACK_DEPTH)
#define STMFTS_MAX_FINGERS 10
#define STMFTS_DEV_NAME "stmfts"
enum stmfts_regulators {
STMFTS_REGULATOR_VDD,
STMFTS_REGULATOR_AVDD,
};
struct stmfts_data {
struct i2c_client *client;
struct input_dev *input;
struct led_classdev led_cdev;
struct mutex mutex;
struct touchscreen_properties prop;
struct regulator_bulk_data regulators[2];
/*
* Presence of ledvdd will be used also to check
* whether the LED is supported.
*/
struct regulator *ledvdd;
u16 chip_id;
u8 chip_ver;
u16 fw_ver;
u8 config_id;
u8 config_ver;
u8 data[STMFTS_DATA_MAX_SIZE];
struct completion cmd_done;
bool use_key;
bool led_status;
bool hover_enabled;
bool running;
};
static int stmfts_brightness_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct stmfts_data *sdata = container_of(led_cdev,
struct stmfts_data, led_cdev);
int err;
if (value != sdata->led_status && sdata->ledvdd) {
if (!value) {
regulator_disable(sdata->ledvdd);
} else {
err = regulator_enable(sdata->ledvdd);
if (err) {
dev_warn(&sdata->client->dev,
"failed to disable ledvdd regulator: %d\n",
err);
return err;
}
}
sdata->led_status = value;
}
return 0;
}
static enum led_brightness stmfts_brightness_get(struct led_classdev *led_cdev)
{
struct stmfts_data *sdata = container_of(led_cdev,
struct stmfts_data, led_cdev);
return !!regulator_is_enabled(sdata->ledvdd);
}
/*
* We can't simply use i2c_smbus_read_i2c_block_data because we
* need to read more than 255 bytes (
*/
static int stmfts_read_events(struct stmfts_data *sdata)
{
u8 cmd = STMFTS_READ_ALL_EVENT;
struct i2c_msg msgs[2] = {
{
.addr = sdata->client->addr,
.len = 1,
.buf = &cmd,
},
{
.addr = sdata->client->addr,
.flags = I2C_M_RD,
.len = STMFTS_DATA_MAX_SIZE,
.buf = sdata->data,
},
};
int ret;
ret = i2c_transfer(sdata->client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret < 0)
return ret;
return ret == ARRAY_SIZE(msgs) ? 0 : -EIO;
}
static void stmfts_report_contact_event(struct stmfts_data *sdata,
const u8 event[])
{
u8 slot_id = (event[0] & STMFTS_MASK_TOUCH_ID) >> 4;
u16 x = event[1] | ((event[2] & STMFTS_MASK_X_MSB) << 8);
u16 y = (event[2] >> 4) | (event[3] << 4);
u8 maj = event[4];
u8 min = event[5];
u8 orientation = event[6];
u8 area = event[7];
input_mt_slot(sdata->input, slot_id);
input_mt_report_slot_state(sdata->input, MT_TOOL_FINGER, true);
input_report_abs(sdata->input, ABS_MT_POSITION_X, x);
input_report_abs(sdata->input, ABS_MT_POSITION_Y, y);
input_report_abs(sdata->input, ABS_MT_TOUCH_MAJOR, maj);
input_report_abs(sdata->input, ABS_MT_TOUCH_MINOR, min);
input_report_abs(sdata->input, ABS_MT_PRESSURE, area);
input_report_abs(sdata->input, ABS_MT_ORIENTATION, orientation);
input_sync(sdata->input);
}
static void stmfts_report_contact_release(struct stmfts_data *sdata,
const u8 event[])
{
u8 slot_id = (event[0] & STMFTS_MASK_TOUCH_ID) >> 4;
input_mt_slot(sdata->input, slot_id);
input_mt_report_slot_inactive(sdata->input);
input_sync(sdata->input);
}
static void stmfts_report_hover_event(struct stmfts_data *sdata,
const u8 event[])
{
u16 x = (event[2] << 4) | (event[4] >> 4);
u16 y = (event[3] << 4) | (event[4] & STMFTS_MASK_Y_LSB);
u8 z = event[5];
input_report_abs(sdata->input, ABS_X, x);
input_report_abs(sdata->input, ABS_Y, y);
input_report_abs(sdata->input, ABS_DISTANCE, z);
input_sync(sdata->input);
}
static void stmfts_report_key_event(struct stmfts_data *sdata, const u8 event[])
{
switch (event[2]) {
case 0:
input_report_key(sdata->input, KEY_BACK, 0);
input_report_key(sdata->input, KEY_MENU, 0);
break;
case STMFTS_MASK_KEY_BACK:
input_report_key(sdata->input, KEY_BACK, 1);
break;
case STMFTS_MASK_KEY_MENU:
input_report_key(sdata->input, KEY_MENU, 1);
break;
default:
dev_warn(&sdata->client->dev,
"unknown key event: %#02x\n", event[2]);
break;
}
input_sync(sdata->input);
}
static void stmfts_parse_events(struct stmfts_data *sdata)
{
int i;
for (i = 0; i < STMFTS_STACK_DEPTH; i++) {
u8 *event = &sdata->data[i * STMFTS_EVENT_SIZE];
switch (event[0]) {
case STMFTS_EV_CONTROLLER_READY:
case STMFTS_EV_SLEEP_OUT_CONTROLLER_READY:
case STMFTS_EV_STATUS:
complete(&sdata->cmd_done);
fallthrough;
case STMFTS_EV_NO_EVENT:
case STMFTS_EV_DEBUG:
return;
}
switch (event[0] & STMFTS_MASK_EVENT_ID) {
case STMFTS_EV_MULTI_TOUCH_ENTER:
case STMFTS_EV_MULTI_TOUCH_MOTION:
stmfts_report_contact_event(sdata, event);
break;
case STMFTS_EV_MULTI_TOUCH_LEAVE:
stmfts_report_contact_release(sdata, event);
break;
case STMFTS_EV_HOVER_ENTER:
case STMFTS_EV_HOVER_LEAVE:
case STMFTS_EV_HOVER_MOTION:
stmfts_report_hover_event(sdata, event);
break;
case STMFTS_EV_KEY_STATUS:
stmfts_report_key_event(sdata, event);
break;
case STMFTS_EV_ERROR:
dev_warn(&sdata->client->dev,
"error code: 0x%x%x%x%x%x%x",
event[6], event[5], event[4],
event[3], event[2], event[1]);
break;
default:
dev_err(&sdata->client->dev,
"unknown event %#02x\n", event[0]);
}
}
}
static irqreturn_t stmfts_irq_handler(int irq, void *dev)
{
struct stmfts_data *sdata = dev;
int err;
mutex_lock(&sdata->mutex);
err = stmfts_read_events(sdata);
if (unlikely(err))
dev_err(&sdata->client->dev,
"failed to read events: %d\n", err);
else
stmfts_parse_events(sdata);
mutex_unlock(&sdata->mutex);
return IRQ_HANDLED;
}
static int stmfts_command(struct stmfts_data *sdata, const u8 cmd)
{
int err;
reinit_completion(&sdata->cmd_done);
err = i2c_smbus_write_byte(sdata->client, cmd);
if (err)
return err;
if (!wait_for_completion_timeout(&sdata->cmd_done,
msecs_to_jiffies(1000)))
return -ETIMEDOUT;
return 0;
}
static int stmfts_input_open(struct input_dev *dev)
{
struct stmfts_data *sdata = input_get_drvdata(dev);
int err;
err = pm_runtime_resume_and_get(&sdata->client->dev);
if (err)
return err;
err = i2c_smbus_write_byte(sdata->client, STMFTS_MS_MT_SENSE_ON);
if (err) {
pm_runtime_put_sync(&sdata->client->dev);
return err;
}
mutex_lock(&sdata->mutex);
sdata->running = true;
if (sdata->hover_enabled) {
err = i2c_smbus_write_byte(sdata->client,
STMFTS_SS_HOVER_SENSE_ON);
if (err)
dev_warn(&sdata->client->dev,
"failed to enable hover\n");
}
mutex_unlock(&sdata->mutex);
if (sdata->use_key) {
err = i2c_smbus_write_byte(sdata->client,
STMFTS_MS_KEY_SENSE_ON);
if (err)
/* I can still use only the touch screen */
dev_warn(&sdata->client->dev,
"failed to enable touchkey\n");
}
return 0;
}
static void stmfts_input_close(struct input_dev *dev)
{
struct stmfts_data *sdata = input_get_drvdata(dev);
int err;
err = i2c_smbus_write_byte(sdata->client, STMFTS_MS_MT_SENSE_OFF);
if (err)
dev_warn(&sdata->client->dev,
"failed to disable touchscreen: %d\n", err);
mutex_lock(&sdata->mutex);
sdata->running = false;
if (sdata->hover_enabled) {
err = i2c_smbus_write_byte(sdata->client,
STMFTS_SS_HOVER_SENSE_OFF);
if (err)
dev_warn(&sdata->client->dev,
"failed to disable hover: %d\n", err);
}
mutex_unlock(&sdata->mutex);
if (sdata->use_key) {
err = i2c_smbus_write_byte(sdata->client,
STMFTS_MS_KEY_SENSE_OFF);
if (err)
dev_warn(&sdata->client->dev,
"failed to disable touchkey: %d\n", err);
}
pm_runtime_put_sync(&sdata->client->dev);
}
static ssize_t stmfts_sysfs_chip_id(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct stmfts_data *sdata = dev_get_drvdata(dev);
return sprintf(buf, "%#x\n", sdata->chip_id);
}
static ssize_t stmfts_sysfs_chip_version(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct stmfts_data *sdata = dev_get_drvdata(dev);
return sprintf(buf, "%u\n", sdata->chip_ver);
}
static ssize_t stmfts_sysfs_fw_ver(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct stmfts_data *sdata = dev_get_drvdata(dev);
return sprintf(buf, "%u\n", sdata->fw_ver);
}
static ssize_t stmfts_sysfs_config_id(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct stmfts_data *sdata = dev_get_drvdata(dev);
return sprintf(buf, "%#x\n", sdata->config_id);
}
static ssize_t stmfts_sysfs_config_version(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct stmfts_data *sdata = dev_get_drvdata(dev);
return sprintf(buf, "%u\n", sdata->config_ver);
}
static ssize_t stmfts_sysfs_read_status(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct stmfts_data *sdata = dev_get_drvdata(dev);
u8 status[4];
int err;
err = i2c_smbus_read_i2c_block_data(sdata->client, STMFTS_READ_STATUS,
sizeof(status), status);
if (err)
return err;
return sprintf(buf, "%#02x\n", status[0]);
}
static ssize_t stmfts_sysfs_hover_enable_read(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct stmfts_data *sdata = dev_get_drvdata(dev);
return sprintf(buf, "%u\n", sdata->hover_enabled);
}
static ssize_t stmfts_sysfs_hover_enable_write(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct stmfts_data *sdata = dev_get_drvdata(dev);
unsigned long value;
int err = 0;
if (kstrtoul(buf, 0, &value))
return -EINVAL;
mutex_lock(&sdata->mutex);
if (value && sdata->hover_enabled)
goto out;
if (sdata->running)
err = i2c_smbus_write_byte(sdata->client,
value ? STMFTS_SS_HOVER_SENSE_ON :
STMFTS_SS_HOVER_SENSE_OFF);
if (!err)
sdata->hover_enabled = !!value;
out:
mutex_unlock(&sdata->mutex);
return len;
}
static DEVICE_ATTR(chip_id, 0444, stmfts_sysfs_chip_id, NULL);
static DEVICE_ATTR(chip_version, 0444, stmfts_sysfs_chip_version, NULL);
static DEVICE_ATTR(fw_ver, 0444, stmfts_sysfs_fw_ver, NULL);
static DEVICE_ATTR(config_id, 0444, stmfts_sysfs_config_id, NULL);
static DEVICE_ATTR(config_version, 0444, stmfts_sysfs_config_version, NULL);
static DEVICE_ATTR(status, 0444, stmfts_sysfs_read_status, NULL);
static DEVICE_ATTR(hover_enable, 0644, stmfts_sysfs_hover_enable_read,
stmfts_sysfs_hover_enable_write);
static struct attribute *stmfts_sysfs_attrs[] = {
&dev_attr_chip_id.attr,
&dev_attr_chip_version.attr,
&dev_attr_fw_ver.attr,
&dev_attr_config_id.attr,
&dev_attr_config_version.attr,
&dev_attr_status.attr,
&dev_attr_hover_enable.attr,
NULL
};
static struct attribute_group stmfts_attribute_group = {
.attrs = stmfts_sysfs_attrs
};
static int stmfts_power_on(struct stmfts_data *sdata)
{
int err;
u8 reg[8];
err = regulator_bulk_enable(ARRAY_SIZE(sdata->regulators),
sdata->regulators);
if (err)
return err;
/*
* The datasheet does not specify the power on time, but considering
* that the reset time is < 10ms, I sleep 20ms to be sure
*/
msleep(20);
err = i2c_smbus_read_i2c_block_data(sdata->client, STMFTS_READ_INFO,
sizeof(reg), reg);
if (err < 0)
return err;
if (err != sizeof(reg))
return -EIO;
sdata->chip_id = be16_to_cpup((__be16 *)®[6]);
sdata->chip_ver = reg[0];
sdata->fw_ver = be16_to_cpup((__be16 *)®[2]);
sdata->config_id = reg[4];
sdata->config_ver = reg[5];
enable_irq(sdata->client->irq);
msleep(50);
err = stmfts_command(sdata, STMFTS_SYSTEM_RESET);
if (err)
return err;
err = stmfts_command(sdata, STMFTS_SLEEP_OUT);
if (err)
return err;
/* optional tuning */
err = stmfts_command(sdata, STMFTS_MS_CX_TUNING);
if (err)
dev_warn(&sdata->client->dev,
"failed to perform mutual auto tune: %d\n", err);
/* optional tuning */
err = stmfts_command(sdata, STMFTS_SS_CX_TUNING);
if (err)
dev_warn(&sdata->client->dev,
"failed to perform self auto tune: %d\n", err);
err = stmfts_command(sdata, STMFTS_FULL_FORCE_CALIBRATION);
if (err)
return err;
/*
* At this point no one is using the touchscreen
* and I don't really care about the return value
*/
(void) i2c_smbus_write_byte(sdata->client, STMFTS_SLEEP_IN);
return 0;
}
static void stmfts_power_off(void *data)
{
struct stmfts_data *sdata = data;
disable_irq(sdata->client->irq);
regulator_bulk_disable(ARRAY_SIZE(sdata->regulators),
sdata->regulators);
}
/* This function is void because I don't want to prevent using the touch key
* only because the LEDs don't get registered
*/
static int stmfts_enable_led(struct stmfts_data *sdata)
{
int err;
/* get the regulator for powering the leds on */
sdata->ledvdd = devm_regulator_get(&sdata->client->dev, "ledvdd");
if (IS_ERR(sdata->ledvdd))
return PTR_ERR(sdata->ledvdd);
sdata->led_cdev.name = STMFTS_DEV_NAME;
sdata->led_cdev.max_brightness = LED_ON;
sdata->led_cdev.brightness = LED_OFF;
sdata->led_cdev.brightness_set_blocking = stmfts_brightness_set;
sdata->led_cdev.brightness_get = stmfts_brightness_get;
err = devm_led_classdev_register(&sdata->client->dev, &sdata->led_cdev);
if (err) {
devm_regulator_put(sdata->ledvdd);
return err;
}
return 0;
}
static int stmfts_probe(struct i2c_client *client)
{
int err;
struct stmfts_data *sdata;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C |
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_I2C_BLOCK))
return -ENODEV;
sdata = devm_kzalloc(&client->dev, sizeof(*sdata), GFP_KERNEL);
if (!sdata)
return -ENOMEM;
i2c_set_clientdata(client, sdata);
sdata->client = client;
mutex_init(&sdata->mutex);
init_completion(&sdata->cmd_done);
sdata->regulators[STMFTS_REGULATOR_VDD].supply = "vdd";
sdata->regulators[STMFTS_REGULATOR_AVDD].supply = "avdd";
err = devm_regulator_bulk_get(&client->dev,
ARRAY_SIZE(sdata->regulators),
sdata->regulators);
if (err)
return err;
sdata->input = devm_input_allocate_device(&client->dev);
if (!sdata->input)
return -ENOMEM;
sdata->input->name = STMFTS_DEV_NAME;
sdata->input->id.bustype = BUS_I2C;
sdata->input->open = stmfts_input_open;
sdata->input->close = stmfts_input_close;
input_set_capability(sdata->input, EV_ABS, ABS_MT_POSITION_X);
input_set_capability(sdata->input, EV_ABS, ABS_MT_POSITION_Y);
touchscreen_parse_properties(sdata->input, true, &sdata->prop);
input_set_abs_params(sdata->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
input_set_abs_params(sdata->input, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0);
input_set_abs_params(sdata->input, ABS_MT_ORIENTATION, 0, 255, 0, 0);
input_set_abs_params(sdata->input, ABS_MT_PRESSURE, 0, 255, 0, 0);
input_set_abs_params(sdata->input, ABS_DISTANCE, 0, 255, 0, 0);
sdata->use_key = device_property_read_bool(&client->dev,
"touch-key-connected");
if (sdata->use_key) {
input_set_capability(sdata->input, EV_KEY, KEY_MENU);
input_set_capability(sdata->input, EV_KEY, KEY_BACK);
}
err = input_mt_init_slots(sdata->input,
STMFTS_MAX_FINGERS, INPUT_MT_DIRECT);
if (err)
return err;
input_set_drvdata(sdata->input, sdata);
/*
* stmfts_power_on expects interrupt to be disabled, but
* at this point the device is still off and I do not trust
* the status of the irq line that can generate some spurious
* interrupts. To be on the safe side it's better to not enable
* the interrupts during their request.
*/
err = devm_request_threaded_irq(&client->dev, client->irq,
NULL, stmfts_irq_handler,
IRQF_ONESHOT | IRQF_NO_AUTOEN,
"stmfts_irq", sdata);
if (err)
return err;
dev_dbg(&client->dev, "initializing ST-Microelectronics FTS...\n");
err = stmfts_power_on(sdata);
if (err)
return err;
err = devm_add_action_or_reset(&client->dev, stmfts_power_off, sdata);
if (err)
return err;
err = input_register_device(sdata->input);
if (err)
return err;
if (sdata->use_key) {
err = stmfts_enable_led(sdata);
if (err) {
/*
* Even if the LEDs have failed to be initialized and
* used in the driver, I can still use the device even
* without LEDs. The ledvdd regulator pointer will be
* used as a flag.
*/
dev_warn(&client->dev, "unable to use touchkey leds\n");
sdata->ledvdd = NULL;
}
}
err = devm_device_add_group(&client->dev, &stmfts_attribute_group);
if (err)
return err;
pm_runtime_enable(&client->dev);
device_enable_async_suspend(&client->dev);
return 0;
}
static void stmfts_remove(struct i2c_client *client)
{
pm_runtime_disable(&client->dev);
}
static int stmfts_runtime_suspend(struct device *dev)
{
struct stmfts_data *sdata = dev_get_drvdata(dev);
int ret;
ret = i2c_smbus_write_byte(sdata->client, STMFTS_SLEEP_IN);
if (ret)
dev_warn(dev, "failed to suspend device: %d\n", ret);
return ret;
}
static int stmfts_runtime_resume(struct device *dev)
{
struct stmfts_data *sdata = dev_get_drvdata(dev);
int ret;
ret = i2c_smbus_write_byte(sdata->client, STMFTS_SLEEP_OUT);
if (ret)
dev_err(dev, "failed to resume device: %d\n", ret);
return ret;
}
static int stmfts_suspend(struct device *dev)
{
struct stmfts_data *sdata = dev_get_drvdata(dev);
stmfts_power_off(sdata);
return 0;
}
static int stmfts_resume(struct device *dev)
{
struct stmfts_data *sdata = dev_get_drvdata(dev);
return stmfts_power_on(sdata);
}
static const struct dev_pm_ops stmfts_pm_ops = {
SYSTEM_SLEEP_PM_OPS(stmfts_suspend, stmfts_resume)
RUNTIME_PM_OPS(stmfts_runtime_suspend, stmfts_runtime_resume, NULL)
};
#ifdef CONFIG_OF
static const struct of_device_id stmfts_of_match[] = {
{ .compatible = "st,stmfts", },
{ },
};
MODULE_DEVICE_TABLE(of, stmfts_of_match);
#endif
static const struct i2c_device_id stmfts_id[] = {
{ "stmfts", 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, stmfts_id);
static struct i2c_driver stmfts_driver = {
.driver = {
.name = STMFTS_DEV_NAME,
.of_match_table = of_match_ptr(stmfts_of_match),
.pm = pm_ptr(&stmfts_pm_ops),
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
.probe = stmfts_probe,
.remove = stmfts_remove,
.id_table = stmfts_id,
};
module_i2c_driver(stmfts_driver);
MODULE_AUTHOR("Andi Shyti <[email protected]>");
MODULE_DESCRIPTION("STMicroelectronics FTS Touch Screen");
MODULE_LICENSE("GPL v2");
|
linux-master
|
drivers/input/touchscreen/stmfts.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Elo serial touchscreen driver
*
* Copyright (c) 2004 Vojtech Pavlik
*/
/*
* This driver can handle serial Elo touchscreens using either the Elo standard
* 'E271-2210' 10-byte protocol, Elo legacy 'E281A-4002' 6-byte protocol, Elo
* legacy 'E271-140' 4-byte protocol and Elo legacy 'E261-280' 3-byte protocol.
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/ctype.h>
#define DRIVER_DESC "Elo serial touchscreen driver"
MODULE_AUTHOR("Vojtech Pavlik <[email protected]>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
/*
* Definitions & global arrays.
*/
#define ELO_MAX_LENGTH 10
#define ELO10_PACKET_LEN 8
#define ELO10_TOUCH 0x03
#define ELO10_PRESSURE 0x80
#define ELO10_LEAD_BYTE 'U'
#define ELO10_ID_CMD 'i'
#define ELO10_TOUCH_PACKET 'T'
#define ELO10_ACK_PACKET 'A'
#define ELI10_ID_PACKET 'I'
/*
* Per-touchscreen data.
*/
struct elo {
struct input_dev *dev;
struct serio *serio;
struct mutex cmd_mutex;
struct completion cmd_done;
int id;
int idx;
unsigned char expected_packet;
unsigned char csum;
unsigned char data[ELO_MAX_LENGTH];
unsigned char response[ELO10_PACKET_LEN];
char phys[32];
};
static void elo_process_data_10(struct elo *elo, unsigned char data)
{
struct input_dev *dev = elo->dev;
elo->data[elo->idx] = data;
switch (elo->idx++) {
case 0:
elo->csum = 0xaa;
if (data != ELO10_LEAD_BYTE) {
dev_dbg(&elo->serio->dev,
"unsynchronized data: 0x%02x\n", data);
elo->idx = 0;
}
break;
case 9:
elo->idx = 0;
if (data != elo->csum) {
dev_dbg(&elo->serio->dev,
"bad checksum: 0x%02x, expected 0x%02x\n",
data, elo->csum);
break;
}
if (elo->data[1] != elo->expected_packet) {
if (elo->data[1] != ELO10_TOUCH_PACKET)
dev_dbg(&elo->serio->dev,
"unexpected packet: 0x%02x\n",
elo->data[1]);
break;
}
if (likely(elo->data[1] == ELO10_TOUCH_PACKET)) {
input_report_abs(dev, ABS_X, (elo->data[4] << 8) | elo->data[3]);
input_report_abs(dev, ABS_Y, (elo->data[6] << 8) | elo->data[5]);
if (elo->data[2] & ELO10_PRESSURE)
input_report_abs(dev, ABS_PRESSURE,
(elo->data[8] << 8) | elo->data[7]);
input_report_key(dev, BTN_TOUCH, elo->data[2] & ELO10_TOUCH);
input_sync(dev);
} else if (elo->data[1] == ELO10_ACK_PACKET) {
if (elo->data[2] == '0')
elo->expected_packet = ELO10_TOUCH_PACKET;
complete(&elo->cmd_done);
} else {
memcpy(elo->response, &elo->data[1], ELO10_PACKET_LEN);
elo->expected_packet = ELO10_ACK_PACKET;
}
break;
}
elo->csum += data;
}
static void elo_process_data_6(struct elo *elo, unsigned char data)
{
struct input_dev *dev = elo->dev;
elo->data[elo->idx] = data;
switch (elo->idx++) {
case 0:
if ((data & 0xc0) != 0xc0)
elo->idx = 0;
break;
case 1:
if ((data & 0xc0) != 0x80)
elo->idx = 0;
break;
case 2:
if ((data & 0xc0) != 0x40)
elo->idx = 0;
break;
case 3:
if (data & 0xc0) {
elo->idx = 0;
break;
}
input_report_abs(dev, ABS_X, ((elo->data[0] & 0x3f) << 6) | (elo->data[1] & 0x3f));
input_report_abs(dev, ABS_Y, ((elo->data[2] & 0x3f) << 6) | (elo->data[3] & 0x3f));
if (elo->id == 2) {
input_report_key(dev, BTN_TOUCH, 1);
input_sync(dev);
elo->idx = 0;
}
break;
case 4:
if (data) {
input_sync(dev);
elo->idx = 0;
}
break;
case 5:
if ((data & 0xf0) == 0) {
input_report_abs(dev, ABS_PRESSURE, elo->data[5]);
input_report_key(dev, BTN_TOUCH, !!elo->data[5]);
}
input_sync(dev);
elo->idx = 0;
break;
}
}
static void elo_process_data_3(struct elo *elo, unsigned char data)
{
struct input_dev *dev = elo->dev;
elo->data[elo->idx] = data;
switch (elo->idx++) {
case 0:
if ((data & 0x7f) != 0x01)
elo->idx = 0;
break;
case 2:
input_report_key(dev, BTN_TOUCH, !(elo->data[1] & 0x80));
input_report_abs(dev, ABS_X, elo->data[1]);
input_report_abs(dev, ABS_Y, elo->data[2]);
input_sync(dev);
elo->idx = 0;
break;
}
}
static irqreturn_t elo_interrupt(struct serio *serio,
unsigned char data, unsigned int flags)
{
struct elo *elo = serio_get_drvdata(serio);
switch (elo->id) {
case 0:
elo_process_data_10(elo, data);
break;
case 1:
case 2:
elo_process_data_6(elo, data);
break;
case 3:
elo_process_data_3(elo, data);
break;
}
return IRQ_HANDLED;
}
static int elo_command_10(struct elo *elo, unsigned char *packet)
{
int rc = -1;
int i;
unsigned char csum = 0xaa + ELO10_LEAD_BYTE;
mutex_lock(&elo->cmd_mutex);
serio_pause_rx(elo->serio);
elo->expected_packet = toupper(packet[0]);
init_completion(&elo->cmd_done);
serio_continue_rx(elo->serio);
if (serio_write(elo->serio, ELO10_LEAD_BYTE))
goto out;
for (i = 0; i < ELO10_PACKET_LEN; i++) {
csum += packet[i];
if (serio_write(elo->serio, packet[i]))
goto out;
}
if (serio_write(elo->serio, csum))
goto out;
wait_for_completion_timeout(&elo->cmd_done, HZ);
if (elo->expected_packet == ELO10_TOUCH_PACKET) {
/* We are back in reporting mode, the command was ACKed */
memcpy(packet, elo->response, ELO10_PACKET_LEN);
rc = 0;
}
out:
mutex_unlock(&elo->cmd_mutex);
return rc;
}
static int elo_setup_10(struct elo *elo)
{
static const char *elo_types[] = { "Accu", "Dura", "Intelli", "Carroll" };
struct input_dev *dev = elo->dev;
unsigned char packet[ELO10_PACKET_LEN] = { ELO10_ID_CMD };
if (elo_command_10(elo, packet))
return -1;
dev->id.version = (packet[5] << 8) | packet[4];
input_set_abs_params(dev, ABS_X, 96, 4000, 0, 0);
input_set_abs_params(dev, ABS_Y, 96, 4000, 0, 0);
if (packet[3] & ELO10_PRESSURE)
input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
dev_info(&elo->serio->dev,
"%sTouch touchscreen, fw: %02x.%02x, features: 0x%02x, controller: 0x%02x\n",
elo_types[(packet[1] -'0') & 0x03],
packet[5], packet[4], packet[3], packet[7]);
return 0;
}
/*
* elo_disconnect() is the opposite of elo_connect()
*/
static void elo_disconnect(struct serio *serio)
{
struct elo *elo = serio_get_drvdata(serio);
input_get_device(elo->dev);
input_unregister_device(elo->dev);
serio_close(serio);
serio_set_drvdata(serio, NULL);
input_put_device(elo->dev);
kfree(elo);
}
/*
* elo_connect() is the routine that is called when someone adds a
* new serio device that supports Gunze protocol and registers it as
* an input device.
*/
static int elo_connect(struct serio *serio, struct serio_driver *drv)
{
struct elo *elo;
struct input_dev *input_dev;
int err;
elo = kzalloc(sizeof(struct elo), GFP_KERNEL);
input_dev = input_allocate_device();
if (!elo || !input_dev) {
err = -ENOMEM;
goto fail1;
}
elo->serio = serio;
elo->id = serio->id.id;
elo->dev = input_dev;
elo->expected_packet = ELO10_TOUCH_PACKET;
mutex_init(&elo->cmd_mutex);
init_completion(&elo->cmd_done);
snprintf(elo->phys, sizeof(elo->phys), "%s/input0", serio->phys);
input_dev->name = "Elo Serial TouchScreen";
input_dev->phys = elo->phys;
input_dev->id.bustype = BUS_RS232;
input_dev->id.vendor = SERIO_ELO;
input_dev->id.product = elo->id;
input_dev->id.version = 0x0100;
input_dev->dev.parent = &serio->dev;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
serio_set_drvdata(serio, elo);
err = serio_open(serio, drv);
if (err)
goto fail2;
switch (elo->id) {
case 0: /* 10-byte protocol */
if (elo_setup_10(elo)) {
err = -EIO;
goto fail3;
}
break;
case 1: /* 6-byte protocol */
input_set_abs_params(input_dev, ABS_PRESSURE, 0, 15, 0, 0);
fallthrough;
case 2: /* 4-byte protocol */
input_set_abs_params(input_dev, ABS_X, 96, 4000, 0, 0);
input_set_abs_params(input_dev, ABS_Y, 96, 4000, 0, 0);
break;
case 3: /* 3-byte protocol */
input_set_abs_params(input_dev, ABS_X, 0, 255, 0, 0);
input_set_abs_params(input_dev, ABS_Y, 0, 255, 0, 0);
break;
}
err = input_register_device(elo->dev);
if (err)
goto fail3;
return 0;
fail3: serio_close(serio);
fail2: serio_set_drvdata(serio, NULL);
fail1: input_free_device(input_dev);
kfree(elo);
return err;
}
/*
* The serio driver structure.
*/
static const struct serio_device_id elo_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_ELO,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, elo_serio_ids);
static struct serio_driver elo_drv = {
.driver = {
.name = "elo",
},
.description = DRIVER_DESC,
.id_table = elo_serio_ids,
.interrupt = elo_interrupt,
.connect = elo_connect,
.disconnect = elo_disconnect,
};
module_serio_driver(elo_drv);
|
linux-master
|
drivers/input/touchscreen/elo.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for ELAN eKTF2127 i2c touchscreen controller
*
* For this driver the layout of the Chipone icn8318 i2c
* touchscreencontroller is used.
*
* Author:
* Michel Verlaan <[email protected]>
* Siebren Vroegindeweij <[email protected]>
*
* Original chipone_icn8318 driver:
* Hans de Goede <[email protected]>
*/
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/delay.h>
/* Packet header defines (first byte of data send / received) */
#define EKTF2127_NOISE 0x40
#define EKTF2127_RESPONSE 0x52
#define EKTF2127_REQUEST 0x53
#define EKTF2127_HELLO 0x55
#define EKTF2127_REPORT2 0x5a
#define EKTF2127_REPORT 0x5d
#define EKTF2127_CALIB_DONE 0x66
/* Register defines (second byte of data send / received) */
#define EKTF2127_ENV_NOISY 0x41
#define EKTF2127_HEIGHT 0x60
#define EKTF2127_WIDTH 0x63
/* 2 bytes header + 5 * 3 bytes coordinates + 3 bytes pressure info + footer */
#define EKTF2127_TOUCH_REPORT_SIZE 21
#define EKTF2127_MAX_TOUCHES 5
struct ektf2127_ts {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *power_gpios;
struct touchscreen_properties prop;
};
static void ektf2127_parse_coordinates(const u8 *buf, unsigned int touch_count,
struct input_mt_pos *touches)
{
int index = 0;
int i;
for (i = 0; i < touch_count; i++) {
index = 2 + i * 3;
touches[i].x = (buf[index] & 0x0f);
touches[i].x <<= 8;
touches[i].x |= buf[index + 2];
touches[i].y = (buf[index] & 0xf0);
touches[i].y <<= 4;
touches[i].y |= buf[index + 1];
}
}
static void ektf2127_report_event(struct ektf2127_ts *ts, const u8 *buf)
{
struct input_mt_pos touches[EKTF2127_MAX_TOUCHES];
int slots[EKTF2127_MAX_TOUCHES];
unsigned int touch_count, i;
touch_count = buf[1] & 0x07;
if (touch_count > EKTF2127_MAX_TOUCHES) {
dev_err(&ts->client->dev,
"Too many touches %d > %d\n",
touch_count, EKTF2127_MAX_TOUCHES);
touch_count = EKTF2127_MAX_TOUCHES;
}
ektf2127_parse_coordinates(buf, touch_count, touches);
input_mt_assign_slots(ts->input, slots, touches,
touch_count, 0);
for (i = 0; i < touch_count; i++) {
input_mt_slot(ts->input, slots[i]);
input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true);
touchscreen_report_pos(ts->input, &ts->prop,
touches[i].x, touches[i].y, true);
}
input_mt_sync_frame(ts->input);
input_sync(ts->input);
}
static void ektf2127_report2_contact(struct ektf2127_ts *ts, int slot,
const u8 *buf, bool active)
{
input_mt_slot(ts->input, slot);
input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, active);
if (active) {
int x = (buf[0] & 0xf0) << 4 | buf[1];
int y = (buf[0] & 0x0f) << 8 | buf[2];
touchscreen_report_pos(ts->input, &ts->prop, x, y, true);
}
}
static void ektf2127_report2_event(struct ektf2127_ts *ts, const u8 *buf)
{
ektf2127_report2_contact(ts, 0, &buf[1], !!(buf[7] & 2));
ektf2127_report2_contact(ts, 1, &buf[4], !!(buf[7] & 4));
input_mt_sync_frame(ts->input);
input_sync(ts->input);
}
static irqreturn_t ektf2127_irq(int irq, void *dev_id)
{
struct ektf2127_ts *ts = dev_id;
struct device *dev = &ts->client->dev;
char buf[EKTF2127_TOUCH_REPORT_SIZE];
int ret;
ret = i2c_master_recv(ts->client, buf, EKTF2127_TOUCH_REPORT_SIZE);
if (ret != EKTF2127_TOUCH_REPORT_SIZE) {
dev_err(dev, "Error reading touch data: %d\n", ret);
goto out;
}
switch (buf[0]) {
case EKTF2127_REPORT:
ektf2127_report_event(ts, buf);
break;
case EKTF2127_REPORT2:
ektf2127_report2_event(ts, buf);
break;
case EKTF2127_NOISE:
if (buf[1] == EKTF2127_ENV_NOISY)
dev_dbg(dev, "Environment is electrically noisy\n");
break;
case EKTF2127_HELLO:
case EKTF2127_CALIB_DONE:
break;
default:
dev_err(dev, "Unexpected packet header byte %#02x\n", buf[0]);
break;
}
out:
return IRQ_HANDLED;
}
static int ektf2127_start(struct input_dev *dev)
{
struct ektf2127_ts *ts = input_get_drvdata(dev);
enable_irq(ts->client->irq);
gpiod_set_value_cansleep(ts->power_gpios, 1);
return 0;
}
static void ektf2127_stop(struct input_dev *dev)
{
struct ektf2127_ts *ts = input_get_drvdata(dev);
disable_irq(ts->client->irq);
gpiod_set_value_cansleep(ts->power_gpios, 0);
}
static int ektf2127_suspend(struct device *dev)
{
struct ektf2127_ts *ts = i2c_get_clientdata(to_i2c_client(dev));
mutex_lock(&ts->input->mutex);
if (input_device_enabled(ts->input))
ektf2127_stop(ts->input);
mutex_unlock(&ts->input->mutex);
return 0;
}
static int ektf2127_resume(struct device *dev)
{
struct ektf2127_ts *ts = i2c_get_clientdata(to_i2c_client(dev));
mutex_lock(&ts->input->mutex);
if (input_device_enabled(ts->input))
ektf2127_start(ts->input);
mutex_unlock(&ts->input->mutex);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(ektf2127_pm_ops, ektf2127_suspend,
ektf2127_resume);
static int ektf2127_query_dimension(struct i2c_client *client, bool width)
{
struct device *dev = &client->dev;
const char *what = width ? "width" : "height";
u8 what_code = width ? EKTF2127_WIDTH : EKTF2127_HEIGHT;
u8 buf[4];
int ret;
int error;
/* Request dimension */
buf[0] = EKTF2127_REQUEST;
buf[1] = width ? EKTF2127_WIDTH : EKTF2127_HEIGHT;
buf[2] = 0x00;
buf[3] = 0x00;
ret = i2c_master_send(client, buf, sizeof(buf));
if (ret != sizeof(buf)) {
error = ret < 0 ? ret : -EIO;
dev_err(dev, "Failed to request %s: %d\n", what, error);
return error;
}
msleep(20);
/* Read response */
ret = i2c_master_recv(client, buf, sizeof(buf));
if (ret != sizeof(buf)) {
error = ret < 0 ? ret : -EIO;
dev_err(dev, "Failed to receive %s data: %d\n", what, error);
return error;
}
if (buf[0] != EKTF2127_RESPONSE || buf[1] != what_code) {
dev_err(dev, "Unexpected %s data: %#02x %#02x\n",
what, buf[0], buf[1]);
return -EIO;
}
return (((buf[3] & 0xf0) << 4) | buf[2]) - 1;
}
static int ektf2127_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct ektf2127_ts *ts;
struct input_dev *input;
u8 buf[4];
int max_x, max_y;
int error;
if (!client->irq) {
dev_err(dev, "Error no irq specified\n");
return -EINVAL;
}
ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
/* This requests the gpio *and* turns on the touchscreen controller */
ts->power_gpios = devm_gpiod_get(dev, "power", GPIOD_OUT_HIGH);
if (IS_ERR(ts->power_gpios))
return dev_err_probe(dev, PTR_ERR(ts->power_gpios), "Error getting power gpio\n");
input = devm_input_allocate_device(dev);
if (!input)
return -ENOMEM;
input->name = client->name;
input->id.bustype = BUS_I2C;
input->open = ektf2127_start;
input->close = ektf2127_stop;
ts->client = client;
/* Read hello (ignore result, depends on initial power state) */
msleep(20);
i2c_master_recv(ts->client, buf, sizeof(buf));
/* Read resolution from chip */
max_x = ektf2127_query_dimension(client, true);
if (max_x < 0)
return max_x;
max_y = ektf2127_query_dimension(client, false);
if (max_y < 0)
return max_y;
input_set_abs_params(input, ABS_MT_POSITION_X, 0, max_x, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0, max_y, 0, 0);
touchscreen_parse_properties(input, true, &ts->prop);
error = input_mt_init_slots(input, EKTF2127_MAX_TOUCHES,
INPUT_MT_DIRECT |
INPUT_MT_DROP_UNUSED |
INPUT_MT_TRACK);
if (error)
return error;
ts->input = input;
input_set_drvdata(input, ts);
error = devm_request_threaded_irq(dev, client->irq,
NULL, ektf2127_irq,
IRQF_ONESHOT, client->name, ts);
if (error) {
dev_err(dev, "Error requesting irq: %d\n", error);
return error;
}
/* Stop device till opened */
ektf2127_stop(ts->input);
error = input_register_device(input);
if (error)
return error;
i2c_set_clientdata(client, ts);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id ektf2127_of_match[] = {
{ .compatible = "elan,ektf2127" },
{ .compatible = "elan,ektf2132" },
{}
};
MODULE_DEVICE_TABLE(of, ektf2127_of_match);
#endif
static const struct i2c_device_id ektf2127_i2c_id[] = {
{ "ektf2127", 0 },
{ "ektf2132", 0 },
{}
};
MODULE_DEVICE_TABLE(i2c, ektf2127_i2c_id);
static struct i2c_driver ektf2127_driver = {
.driver = {
.name = "elan_ektf2127",
.pm = pm_sleep_ptr(&ektf2127_pm_ops),
.of_match_table = of_match_ptr(ektf2127_of_match),
},
.probe = ektf2127_probe,
.id_table = ektf2127_i2c_id,
};
module_i2c_driver(ektf2127_driver);
MODULE_DESCRIPTION("ELAN eKTF2127/eKTF2132 I2C Touchscreen Driver");
MODULE_AUTHOR("Michel Verlaan, Siebren Vroegindeweij");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/ektf2127.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Elan Microelectronics touch panels with I2C interface
*
* Copyright (C) 2014 Elan Microelectronics Corporation.
* Scott Liu <[email protected]>
*
* This code is partly based on hid-multitouch.c:
*
* Copyright (c) 2010-2012 Stephane Chatty <[email protected]>
* Copyright (c) 2010-2012 Benjamin Tissoires <[email protected]>
* Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
*
* This code is partly based on i2c-hid.c:
*
* Copyright (c) 2012 Benjamin Tissoires <[email protected]>
* Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France
* Copyright (c) 2012 Red Hat, Inc
*/
#include <linux/bits.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/async.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/uaccess.h>
#include <linux/buffer_head.h>
#include <linux/slab.h>
#include <linux/firmware.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/acpi.h>
#include <linux/of.h>
#include <linux/pm_wakeirq.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <linux/uuid.h>
#include <asm/unaligned.h>
/* Device, Driver information */
#define DEVICE_NAME "elants_i2c"
/* Convert from rows or columns into resolution */
#define ELAN_TS_RESOLUTION(n, m) (((n) - 1) * (m))
/* FW header data */
#define HEADER_SIZE 4
#define FW_HDR_TYPE 0
#define FW_HDR_COUNT 1
#define FW_HDR_LENGTH 2
/* Buffer mode Queue Header information */
#define QUEUE_HEADER_SINGLE 0x62
#define QUEUE_HEADER_NORMAL 0X63
#define QUEUE_HEADER_WAIT 0x64
#define QUEUE_HEADER_NORMAL2 0x66
/* Command header definition */
#define CMD_HEADER_WRITE 0x54
#define CMD_HEADER_READ 0x53
#define CMD_HEADER_6B_READ 0x5B
#define CMD_HEADER_ROM_READ 0x96
#define CMD_HEADER_RESP 0x52
#define CMD_HEADER_6B_RESP 0x9B
#define CMD_HEADER_ROM_RESP 0x95
#define CMD_HEADER_HELLO 0x55
#define CMD_HEADER_REK 0x66
/* FW position data */
#define PACKET_SIZE_OLD 40
#define PACKET_SIZE 55
#define MAX_CONTACT_NUM 10
#define FW_POS_HEADER 0
#define FW_POS_STATE 1
#define FW_POS_TOTAL 2
#define FW_POS_XY 3
#define FW_POS_TOOL_TYPE 33
#define FW_POS_CHECKSUM 34
#define FW_POS_WIDTH 35
#define FW_POS_PRESSURE 45
#define HEADER_REPORT_10_FINGER 0x62
/* Header (4 bytes) plus 3 full 10-finger packets */
#define MAX_PACKET_SIZE 169
#define BOOT_TIME_DELAY_MS 50
/* FW read command, 0x53 0x?? 0x0, 0x01 */
#define E_ELAN_INFO_FW_VER 0x00
#define E_ELAN_INFO_BC_VER 0x10
#define E_ELAN_INFO_X_RES 0x60
#define E_ELAN_INFO_Y_RES 0x63
#define E_ELAN_INFO_REK 0xD0
#define E_ELAN_INFO_TEST_VER 0xE0
#define E_ELAN_INFO_FW_ID 0xF0
#define E_INFO_OSR 0xD6
#define E_INFO_PHY_SCAN 0xD7
#define E_INFO_PHY_DRIVER 0xD8
/* FW write command, 0x54 0x?? 0x0, 0x01 */
#define E_POWER_STATE_SLEEP 0x50
#define E_POWER_STATE_RESUME 0x58
#define MAX_RETRIES 3
#define MAX_FW_UPDATE_RETRIES 30
#define ELAN_FW_PAGESIZE 132
/* calibration timeout definition */
#define ELAN_CALI_TIMEOUT_MSEC 12000
#define ELAN_POWERON_DELAY_USEC 5000
#define ELAN_RESET_DELAY_MSEC 20
/* FW boot code version */
#define BC_VER_H_BYTE_FOR_EKTH3900x1_I2C 0x72
#define BC_VER_H_BYTE_FOR_EKTH3900x2_I2C 0x82
#define BC_VER_H_BYTE_FOR_EKTH3900x3_I2C 0x92
#define BC_VER_H_BYTE_FOR_EKTH5312x1_I2C 0x6D
#define BC_VER_H_BYTE_FOR_EKTH5312x2_I2C 0x6E
#define BC_VER_H_BYTE_FOR_EKTH5312cx1_I2C 0x77
#define BC_VER_H_BYTE_FOR_EKTH5312cx2_I2C 0x78
#define BC_VER_H_BYTE_FOR_EKTH5312x1_I2C_USB 0x67
#define BC_VER_H_BYTE_FOR_EKTH5312x2_I2C_USB 0x68
#define BC_VER_H_BYTE_FOR_EKTH5312cx1_I2C_USB 0x74
#define BC_VER_H_BYTE_FOR_EKTH5312cx2_I2C_USB 0x75
enum elants_chip_id {
EKTH3500,
EKTF3624,
};
enum elants_state {
ELAN_STATE_NORMAL,
ELAN_WAIT_QUEUE_HEADER,
ELAN_WAIT_RECALIBRATION,
};
enum elants_iap_mode {
ELAN_IAP_OPERATIONAL,
ELAN_IAP_RECOVERY,
};
/* struct elants_data - represents state of Elan touchscreen device */
struct elants_data {
struct i2c_client *client;
struct input_dev *input;
struct regulator *vcc33;
struct regulator *vccio;
struct gpio_desc *reset_gpio;
u16 fw_version;
u8 test_version;
u8 solution_version;
u8 bc_version;
u8 iap_version;
u16 hw_version;
u8 major_res;
unsigned int x_res; /* resolution in units/mm */
unsigned int y_res;
unsigned int x_max;
unsigned int y_max;
unsigned int phy_x;
unsigned int phy_y;
struct touchscreen_properties prop;
enum elants_state state;
enum elants_chip_id chip_id;
enum elants_iap_mode iap_mode;
/* Guards against concurrent access to the device via sysfs */
struct mutex sysfs_mutex;
u8 cmd_resp[HEADER_SIZE];
struct completion cmd_done;
bool keep_power_in_suspend;
/* Must be last to be used for DMA operations */
u8 buf[MAX_PACKET_SIZE] ____cacheline_aligned;
};
static int elants_i2c_send(struct i2c_client *client,
const void *data, size_t size)
{
int ret;
ret = i2c_master_send(client, data, size);
if (ret == size)
return 0;
if (ret >= 0)
ret = -EIO;
dev_err(&client->dev, "%s failed (%*ph): %d\n",
__func__, (int)size, data, ret);
return ret;
}
static int elants_i2c_read(struct i2c_client *client, void *data, size_t size)
{
int ret;
ret = i2c_master_recv(client, data, size);
if (ret == size)
return 0;
if (ret >= 0)
ret = -EIO;
dev_err(&client->dev, "%s failed: %d\n", __func__, ret);
return ret;
}
static int elants_i2c_execute_command(struct i2c_client *client,
const u8 *cmd, size_t cmd_size,
u8 *resp, size_t resp_size,
int retries, const char *cmd_name)
{
struct i2c_msg msgs[2];
int ret;
u8 expected_response;
switch (cmd[0]) {
case CMD_HEADER_READ:
expected_response = CMD_HEADER_RESP;
break;
case CMD_HEADER_6B_READ:
expected_response = CMD_HEADER_6B_RESP;
break;
case CMD_HEADER_ROM_READ:
expected_response = CMD_HEADER_ROM_RESP;
break;
default:
dev_err(&client->dev, "(%s): invalid command: %*ph\n",
cmd_name, (int)cmd_size, cmd);
return -EINVAL;
}
for (;;) {
msgs[0].addr = client->addr;
msgs[0].flags = client->flags & I2C_M_TEN;
msgs[0].len = cmd_size;
msgs[0].buf = (u8 *)cmd;
msgs[1].addr = client->addr;
msgs[1].flags = (client->flags & I2C_M_TEN) | I2C_M_RD;
msgs[1].flags |= I2C_M_RD;
msgs[1].len = resp_size;
msgs[1].buf = resp;
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret < 0) {
if (--retries > 0) {
dev_dbg(&client->dev,
"(%s) I2C transfer failed: %pe (retrying)\n",
cmd_name, ERR_PTR(ret));
continue;
}
dev_err(&client->dev,
"(%s) I2C transfer failed: %pe\n",
cmd_name, ERR_PTR(ret));
return ret;
}
if (ret != ARRAY_SIZE(msgs) ||
resp[FW_HDR_TYPE] != expected_response) {
if (--retries > 0) {
dev_dbg(&client->dev,
"(%s) unexpected response: %*ph (retrying)\n",
cmd_name, ret, resp);
continue;
}
dev_err(&client->dev,
"(%s) unexpected response: %*ph\n",
cmd_name, ret, resp);
return -EIO;
}
return 0;
}
}
static int elants_i2c_calibrate(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
int ret, error;
static const u8 w_flashkey[] = { CMD_HEADER_WRITE, 0xC0, 0xE1, 0x5A };
static const u8 rek[] = { CMD_HEADER_WRITE, 0x29, 0x00, 0x01 };
static const u8 rek_resp[] = { CMD_HEADER_REK, 0x66, 0x66, 0x66 };
disable_irq(client->irq);
ts->state = ELAN_WAIT_RECALIBRATION;
reinit_completion(&ts->cmd_done);
elants_i2c_send(client, w_flashkey, sizeof(w_flashkey));
elants_i2c_send(client, rek, sizeof(rek));
enable_irq(client->irq);
ret = wait_for_completion_interruptible_timeout(&ts->cmd_done,
msecs_to_jiffies(ELAN_CALI_TIMEOUT_MSEC));
ts->state = ELAN_STATE_NORMAL;
if (ret <= 0) {
error = ret < 0 ? ret : -ETIMEDOUT;
dev_err(&client->dev,
"error while waiting for calibration to complete: %d\n",
error);
return error;
}
if (memcmp(rek_resp, ts->cmd_resp, sizeof(rek_resp))) {
dev_err(&client->dev,
"unexpected calibration response: %*ph\n",
(int)sizeof(ts->cmd_resp), ts->cmd_resp);
return -EINVAL;
}
return 0;
}
static int elants_i2c_sw_reset(struct i2c_client *client)
{
const u8 soft_rst_cmd[] = { 0x77, 0x77, 0x77, 0x77 };
int error;
error = elants_i2c_send(client, soft_rst_cmd,
sizeof(soft_rst_cmd));
if (error) {
dev_err(&client->dev, "software reset failed: %d\n", error);
return error;
}
/*
* We should wait at least 10 msec (but no more than 40) before
* sending fastboot or IAP command to the device.
*/
msleep(30);
return 0;
}
static u16 elants_i2c_parse_version(u8 *buf)
{
return get_unaligned_be32(buf) >> 4;
}
static int elants_i2c_query_hw_version(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
int retry_cnt = MAX_RETRIES;
const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_FW_ID, 0x00, 0x01 };
u8 resp[HEADER_SIZE];
int error;
while (retry_cnt--) {
error = elants_i2c_execute_command(client, cmd, sizeof(cmd),
resp, sizeof(resp), 1,
"read fw id");
if (error)
return error;
ts->hw_version = elants_i2c_parse_version(resp);
if (ts->hw_version != 0xffff)
return 0;
}
dev_err(&client->dev, "Invalid fw id: %#04x\n", ts->hw_version);
return -EINVAL;
}
static int elants_i2c_query_fw_version(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
int retry_cnt = MAX_RETRIES;
const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_FW_VER, 0x00, 0x01 };
u8 resp[HEADER_SIZE];
int error;
while (retry_cnt--) {
error = elants_i2c_execute_command(client, cmd, sizeof(cmd),
resp, sizeof(resp), 1,
"read fw version");
if (error)
return error;
ts->fw_version = elants_i2c_parse_version(resp);
if (ts->fw_version != 0x0000 && ts->fw_version != 0xffff)
return 0;
dev_dbg(&client->dev, "(read fw version) resp %*phC\n",
(int)sizeof(resp), resp);
}
dev_err(&client->dev, "Invalid fw ver: %#04x\n", ts->fw_version);
return -EINVAL;
}
static int elants_i2c_query_test_version(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
int error;
u16 version;
const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_TEST_VER, 0x00, 0x01 };
u8 resp[HEADER_SIZE];
error = elants_i2c_execute_command(client, cmd, sizeof(cmd),
resp, sizeof(resp), MAX_RETRIES,
"read test version");
if (error) {
dev_err(&client->dev, "Failed to read test version\n");
return error;
}
version = elants_i2c_parse_version(resp);
ts->test_version = version >> 8;
ts->solution_version = version & 0xff;
return 0;
}
static int elants_i2c_query_bc_version(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_BC_VER, 0x00, 0x01 };
u8 resp[HEADER_SIZE];
u16 version;
int error;
error = elants_i2c_execute_command(client, cmd, sizeof(cmd),
resp, sizeof(resp), 1,
"read BC version");
if (error)
return error;
version = elants_i2c_parse_version(resp);
ts->bc_version = version >> 8;
ts->iap_version = version & 0xff;
return 0;
}
static int elants_i2c_query_ts_info_ektf(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
int error;
u8 resp[4];
u16 phy_x, phy_y;
const u8 get_xres_cmd[] = {
CMD_HEADER_READ, E_ELAN_INFO_X_RES, 0x00, 0x00
};
const u8 get_yres_cmd[] = {
CMD_HEADER_READ, E_ELAN_INFO_Y_RES, 0x00, 0x00
};
/* Get X/Y size in mm */
error = elants_i2c_execute_command(client, get_xres_cmd,
sizeof(get_xres_cmd),
resp, sizeof(resp), 1,
"get X size");
if (error)
return error;
phy_x = resp[2] | ((resp[3] & 0xF0) << 4);
error = elants_i2c_execute_command(client, get_yres_cmd,
sizeof(get_yres_cmd),
resp, sizeof(resp), 1,
"get Y size");
if (error)
return error;
phy_y = resp[2] | ((resp[3] & 0xF0) << 4);
dev_dbg(&client->dev, "phy_x=%d, phy_y=%d\n", phy_x, phy_y);
ts->phy_x = phy_x;
ts->phy_y = phy_y;
/* eKTF doesn't report max size, set it to default values */
ts->x_max = 2240 - 1;
ts->y_max = 1408 - 1;
return 0;
}
static int elants_i2c_query_ts_info_ekth(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
int error;
u8 resp[17];
u16 phy_x, phy_y, rows, cols, osr;
const u8 get_resolution_cmd[] = {
CMD_HEADER_6B_READ, 0x00, 0x00, 0x00, 0x00, 0x00
};
const u8 get_osr_cmd[] = {
CMD_HEADER_READ, E_INFO_OSR, 0x00, 0x01
};
const u8 get_physical_scan_cmd[] = {
CMD_HEADER_READ, E_INFO_PHY_SCAN, 0x00, 0x01
};
const u8 get_physical_drive_cmd[] = {
CMD_HEADER_READ, E_INFO_PHY_DRIVER, 0x00, 0x01
};
/* Get trace number */
error = elants_i2c_execute_command(client,
get_resolution_cmd,
sizeof(get_resolution_cmd),
resp, sizeof(resp), 1,
"get resolution");
if (error)
return error;
rows = resp[2] + resp[6] + resp[10];
cols = resp[3] + resp[7] + resp[11];
/* Get report resolution value of ABS_MT_TOUCH_MAJOR */
ts->major_res = resp[16];
/* Process mm_to_pixel information */
error = elants_i2c_execute_command(client,
get_osr_cmd, sizeof(get_osr_cmd),
resp, sizeof(resp), 1, "get osr");
if (error)
return error;
osr = resp[3];
error = elants_i2c_execute_command(client,
get_physical_scan_cmd,
sizeof(get_physical_scan_cmd),
resp, sizeof(resp), 1,
"get physical scan");
if (error)
return error;
phy_x = get_unaligned_be16(&resp[2]);
error = elants_i2c_execute_command(client,
get_physical_drive_cmd,
sizeof(get_physical_drive_cmd),
resp, sizeof(resp), 1,
"get physical drive");
if (error)
return error;
phy_y = get_unaligned_be16(&resp[2]);
dev_dbg(&client->dev, "phy_x=%d, phy_y=%d\n", phy_x, phy_y);
if (rows == 0 || cols == 0 || osr == 0) {
dev_warn(&client->dev,
"invalid trace number data: %d, %d, %d\n",
rows, cols, osr);
} else {
/* translate trace number to TS resolution */
ts->x_max = ELAN_TS_RESOLUTION(rows, osr);
ts->x_res = DIV_ROUND_CLOSEST(ts->x_max, phy_x);
ts->y_max = ELAN_TS_RESOLUTION(cols, osr);
ts->y_res = DIV_ROUND_CLOSEST(ts->y_max, phy_y);
ts->phy_x = phy_x;
ts->phy_y = phy_y;
}
return 0;
}
static int elants_i2c_fastboot(struct i2c_client *client)
{
const u8 boot_cmd[] = { 0x4D, 0x61, 0x69, 0x6E };
int error;
error = elants_i2c_send(client, boot_cmd, sizeof(boot_cmd));
if (error) {
dev_err(&client->dev, "boot failed: %d\n", error);
return error;
}
dev_dbg(&client->dev, "boot success -- 0x%x\n", client->addr);
return 0;
}
static int elants_i2c_initialize(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
int error, error2, retry_cnt;
const u8 hello_packet[] = { 0x55, 0x55, 0x55, 0x55 };
const u8 recov_packet[] = { 0x55, 0x55, 0x80, 0x80 };
u8 buf[HEADER_SIZE];
for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) {
error = elants_i2c_sw_reset(client);
if (error) {
/* Continue initializing if it's the last try */
if (retry_cnt < MAX_RETRIES - 1)
continue;
}
error = elants_i2c_fastboot(client);
if (error) {
/* Continue initializing if it's the last try */
if (retry_cnt < MAX_RETRIES - 1)
continue;
}
/* Wait for Hello packet */
msleep(BOOT_TIME_DELAY_MS);
error = elants_i2c_read(client, buf, sizeof(buf));
if (error) {
dev_err(&client->dev,
"failed to read 'hello' packet: %d\n", error);
} else if (!memcmp(buf, hello_packet, sizeof(hello_packet))) {
ts->iap_mode = ELAN_IAP_OPERATIONAL;
break;
} else if (!memcmp(buf, recov_packet, sizeof(recov_packet))) {
/*
* Setting error code will mark device
* in recovery mode below.
*/
error = -EIO;
break;
} else {
error = -EINVAL;
dev_err(&client->dev,
"invalid 'hello' packet: %*ph\n",
(int)sizeof(buf), buf);
}
}
/* hw version is available even if device in recovery state */
error2 = elants_i2c_query_hw_version(ts);
if (!error2)
error2 = elants_i2c_query_bc_version(ts);
if (!error)
error = error2;
if (!error)
error = elants_i2c_query_fw_version(ts);
if (!error)
error = elants_i2c_query_test_version(ts);
switch (ts->chip_id) {
case EKTH3500:
if (!error)
error = elants_i2c_query_ts_info_ekth(ts);
break;
case EKTF3624:
if (!error)
error = elants_i2c_query_ts_info_ektf(ts);
break;
default:
BUG();
}
if (error)
ts->iap_mode = ELAN_IAP_RECOVERY;
return 0;
}
/*
* Firmware update interface.
*/
static int elants_i2c_fw_write_page(struct i2c_client *client,
const void *page)
{
const u8 ack_ok[] = { 0xaa, 0xaa };
u8 buf[2];
int retry;
int error;
for (retry = 0; retry < MAX_FW_UPDATE_RETRIES; retry++) {
error = elants_i2c_send(client, page, ELAN_FW_PAGESIZE);
if (error) {
dev_err(&client->dev,
"IAP Write Page failed: %d\n", error);
continue;
}
error = elants_i2c_read(client, buf, 2);
if (error) {
dev_err(&client->dev,
"IAP Ack read failed: %d\n", error);
return error;
}
if (!memcmp(buf, ack_ok, sizeof(ack_ok)))
return 0;
error = -EIO;
dev_err(&client->dev,
"IAP Get Ack Error [%02x:%02x]\n",
buf[0], buf[1]);
}
return error;
}
static int elants_i2c_validate_remark_id(struct elants_data *ts,
const struct firmware *fw)
{
struct i2c_client *client = ts->client;
int error;
const u8 cmd[] = { CMD_HEADER_ROM_READ, 0x80, 0x1F, 0x00, 0x00, 0x21 };
u8 resp[6] = { 0 };
u16 ts_remark_id = 0;
u16 fw_remark_id = 0;
/* Compare TS Remark ID and FW Remark ID */
error = elants_i2c_execute_command(client, cmd, sizeof(cmd),
resp, sizeof(resp),
1, "read Remark ID");
if (error)
return error;
ts_remark_id = get_unaligned_be16(&resp[3]);
fw_remark_id = get_unaligned_le16(&fw->data[fw->size - 4]);
if (fw_remark_id != ts_remark_id) {
dev_err(&client->dev,
"Remark ID Mismatched: ts_remark_id=0x%04x, fw_remark_id=0x%04x.\n",
ts_remark_id, fw_remark_id);
return -EINVAL;
}
return 0;
}
static bool elants_i2c_should_check_remark_id(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
const u8 bootcode_version = ts->iap_version;
bool check;
/* I2C eKTH3900 and eKTH5312 are NOT support Remark ID */
if ((bootcode_version == BC_VER_H_BYTE_FOR_EKTH3900x1_I2C) ||
(bootcode_version == BC_VER_H_BYTE_FOR_EKTH3900x2_I2C) ||
(bootcode_version == BC_VER_H_BYTE_FOR_EKTH3900x3_I2C) ||
(bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312x1_I2C) ||
(bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312x2_I2C) ||
(bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312cx1_I2C) ||
(bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312cx2_I2C) ||
(bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312x1_I2C_USB) ||
(bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312x2_I2C_USB) ||
(bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312cx1_I2C_USB) ||
(bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312cx2_I2C_USB)) {
dev_dbg(&client->dev,
"eKTH3900/eKTH5312(0x%02x) are not support remark id\n",
bootcode_version);
check = false;
} else if (bootcode_version >= 0x60) {
check = true;
} else {
check = false;
}
return check;
}
static int elants_i2c_do_update_firmware(struct i2c_client *client,
const struct firmware *fw,
bool force)
{
struct elants_data *ts = i2c_get_clientdata(client);
const u8 enter_iap[] = { 0x45, 0x49, 0x41, 0x50 };
const u8 enter_iap2[] = { 0x54, 0x00, 0x12, 0x34 };
const u8 iap_ack[] = { 0x55, 0xaa, 0x33, 0xcc };
const u8 close_idle[] = { 0x54, 0x2c, 0x01, 0x01 };
u8 buf[HEADER_SIZE];
u16 send_id;
int page, n_fw_pages;
int error;
bool check_remark_id = elants_i2c_should_check_remark_id(ts);
/* Recovery mode detection! */
if (force) {
dev_dbg(&client->dev, "Recovery mode procedure\n");
if (check_remark_id) {
error = elants_i2c_validate_remark_id(ts, fw);
if (error)
return error;
}
error = elants_i2c_send(client, enter_iap2, sizeof(enter_iap2));
if (error) {
dev_err(&client->dev, "failed to enter IAP mode: %d\n",
error);
return error;
}
} else {
/* Start IAP Procedure */
dev_dbg(&client->dev, "Normal IAP procedure\n");
/* Close idle mode */
error = elants_i2c_send(client, close_idle, sizeof(close_idle));
if (error)
dev_err(&client->dev, "Failed close idle: %d\n", error);
msleep(60);
elants_i2c_sw_reset(client);
msleep(20);
if (check_remark_id) {
error = elants_i2c_validate_remark_id(ts, fw);
if (error)
return error;
}
error = elants_i2c_send(client, enter_iap, sizeof(enter_iap));
if (error) {
dev_err(&client->dev, "failed to enter IAP mode: %d\n",
error);
return error;
}
}
msleep(20);
/* check IAP state */
error = elants_i2c_read(client, buf, 4);
if (error) {
dev_err(&client->dev,
"failed to read IAP acknowledgement: %d\n",
error);
return error;
}
if (memcmp(buf, iap_ack, sizeof(iap_ack))) {
dev_err(&client->dev,
"failed to enter IAP: %*ph (expected %*ph)\n",
(int)sizeof(buf), buf, (int)sizeof(iap_ack), iap_ack);
return -EIO;
}
dev_info(&client->dev, "successfully entered IAP mode");
send_id = client->addr;
error = elants_i2c_send(client, &send_id, 1);
if (error) {
dev_err(&client->dev, "sending dummy byte failed: %d\n",
error);
return error;
}
/* Clear the last page of Master */
error = elants_i2c_send(client, fw->data, ELAN_FW_PAGESIZE);
if (error) {
dev_err(&client->dev, "clearing of the last page failed: %d\n",
error);
return error;
}
error = elants_i2c_read(client, buf, 2);
if (error) {
dev_err(&client->dev,
"failed to read ACK for clearing the last page: %d\n",
error);
return error;
}
n_fw_pages = fw->size / ELAN_FW_PAGESIZE;
dev_dbg(&client->dev, "IAP Pages = %d\n", n_fw_pages);
for (page = 0; page < n_fw_pages; page++) {
error = elants_i2c_fw_write_page(client,
fw->data + page * ELAN_FW_PAGESIZE);
if (error) {
dev_err(&client->dev,
"failed to write FW page %d: %d\n",
page, error);
return error;
}
}
/* Old iap needs to wait 200ms for WDT and rest is for hello packets */
msleep(300);
dev_info(&client->dev, "firmware update completed\n");
return 0;
}
static int elants_i2c_fw_update(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
const struct firmware *fw;
char *fw_name;
int error;
fw_name = kasprintf(GFP_KERNEL, "elants_i2c_%04x.bin", ts->hw_version);
if (!fw_name)
return -ENOMEM;
dev_info(&client->dev, "requesting fw name = %s\n", fw_name);
error = request_firmware(&fw, fw_name, &client->dev);
kfree(fw_name);
if (error) {
dev_err(&client->dev, "failed to request firmware: %d\n",
error);
return error;
}
if (fw->size % ELAN_FW_PAGESIZE) {
dev_err(&client->dev, "invalid firmware length: %zu\n",
fw->size);
error = -EINVAL;
goto out;
}
disable_irq(client->irq);
error = elants_i2c_do_update_firmware(client, fw,
ts->iap_mode == ELAN_IAP_RECOVERY);
if (error) {
dev_err(&client->dev, "firmware update failed: %d\n", error);
ts->iap_mode = ELAN_IAP_RECOVERY;
goto out_enable_irq;
}
error = elants_i2c_initialize(ts);
if (error) {
dev_err(&client->dev,
"failed to initialize device after firmware update: %d\n",
error);
ts->iap_mode = ELAN_IAP_RECOVERY;
goto out_enable_irq;
}
ts->iap_mode = ELAN_IAP_OPERATIONAL;
out_enable_irq:
ts->state = ELAN_STATE_NORMAL;
enable_irq(client->irq);
msleep(100);
if (!error)
elants_i2c_calibrate(ts);
out:
release_firmware(fw);
return error;
}
/*
* Event reporting.
*/
static void elants_i2c_mt_event(struct elants_data *ts, u8 *buf,
size_t packet_size)
{
struct input_dev *input = ts->input;
unsigned int n_fingers;
unsigned int tool_type;
u16 finger_state;
int i;
n_fingers = buf[FW_POS_STATE + 1] & 0x0f;
finger_state = ((buf[FW_POS_STATE + 1] & 0x30) << 4) |
buf[FW_POS_STATE];
dev_dbg(&ts->client->dev,
"n_fingers: %u, state: %04x\n", n_fingers, finger_state);
/* Note: all fingers have the same tool type */
tool_type = buf[FW_POS_TOOL_TYPE] & BIT(0) ?
MT_TOOL_FINGER : MT_TOOL_PALM;
for (i = 0; i < MAX_CONTACT_NUM && n_fingers; i++) {
if (finger_state & 1) {
unsigned int x, y, p, w;
u8 *pos;
pos = &buf[FW_POS_XY + i * 3];
x = (((u16)pos[0] & 0xf0) << 4) | pos[1];
y = (((u16)pos[0] & 0x0f) << 8) | pos[2];
/*
* eKTF3624 may have use "old" touch-report format,
* depending on a device and TS firmware version.
* For example, ASUS Transformer devices use the "old"
* format, while ASUS Nexus 7 uses the "new" formant.
*/
if (packet_size == PACKET_SIZE_OLD &&
ts->chip_id == EKTF3624) {
w = buf[FW_POS_WIDTH + i / 2];
w >>= 4 * (~i & 1);
w |= w << 4;
w |= !w;
p = w;
} else {
p = buf[FW_POS_PRESSURE + i];
w = buf[FW_POS_WIDTH + i];
}
dev_dbg(&ts->client->dev, "i=%d x=%d y=%d p=%d w=%d\n",
i, x, y, p, w);
input_mt_slot(input, i);
input_mt_report_slot_state(input, tool_type, true);
touchscreen_report_pos(input, &ts->prop, x, y, true);
input_event(input, EV_ABS, ABS_MT_PRESSURE, p);
input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, w);
n_fingers--;
}
finger_state >>= 1;
}
input_mt_sync_frame(input);
input_sync(input);
}
static u8 elants_i2c_calculate_checksum(u8 *buf)
{
u8 checksum = 0;
u8 i;
for (i = 0; i < FW_POS_CHECKSUM; i++)
checksum += buf[i];
return checksum;
}
static void elants_i2c_event(struct elants_data *ts, u8 *buf,
size_t packet_size)
{
u8 checksum = elants_i2c_calculate_checksum(buf);
if (unlikely(buf[FW_POS_CHECKSUM] != checksum))
dev_warn(&ts->client->dev,
"%s: invalid checksum for packet %02x: %02x vs. %02x\n",
__func__, buf[FW_POS_HEADER],
checksum, buf[FW_POS_CHECKSUM]);
else if (unlikely(buf[FW_POS_HEADER] != HEADER_REPORT_10_FINGER))
dev_warn(&ts->client->dev,
"%s: unknown packet type: %02x\n",
__func__, buf[FW_POS_HEADER]);
else
elants_i2c_mt_event(ts, buf, packet_size);
}
static irqreturn_t elants_i2c_irq(int irq, void *_dev)
{
const u8 wait_packet[] = { 0x64, 0x64, 0x64, 0x64 };
struct elants_data *ts = _dev;
struct i2c_client *client = ts->client;
int report_count, report_len;
int i;
int len;
len = i2c_master_recv_dmasafe(client, ts->buf, sizeof(ts->buf));
if (len < 0) {
dev_err(&client->dev, "%s: failed to read data: %d\n",
__func__, len);
goto out;
}
dev_dbg(&client->dev, "%s: packet %*ph\n",
__func__, HEADER_SIZE, ts->buf);
switch (ts->state) {
case ELAN_WAIT_RECALIBRATION:
if (ts->buf[FW_HDR_TYPE] == CMD_HEADER_REK) {
memcpy(ts->cmd_resp, ts->buf, sizeof(ts->cmd_resp));
complete(&ts->cmd_done);
ts->state = ELAN_STATE_NORMAL;
}
break;
case ELAN_WAIT_QUEUE_HEADER:
if (ts->buf[FW_HDR_TYPE] != QUEUE_HEADER_NORMAL)
break;
ts->state = ELAN_STATE_NORMAL;
fallthrough;
case ELAN_STATE_NORMAL:
switch (ts->buf[FW_HDR_TYPE]) {
case CMD_HEADER_HELLO:
case CMD_HEADER_RESP:
break;
case QUEUE_HEADER_WAIT:
if (memcmp(ts->buf, wait_packet, sizeof(wait_packet))) {
dev_err(&client->dev,
"invalid wait packet %*ph\n",
HEADER_SIZE, ts->buf);
} else {
ts->state = ELAN_WAIT_QUEUE_HEADER;
udelay(30);
}
break;
case QUEUE_HEADER_SINGLE:
elants_i2c_event(ts, &ts->buf[HEADER_SIZE],
ts->buf[FW_HDR_LENGTH]);
break;
case QUEUE_HEADER_NORMAL2: /* CMD_HEADER_REK */
/*
* Depending on firmware version, eKTF3624 touchscreens
* may utilize one of these opcodes for the touch events:
* 0x63 (NORMAL) and 0x66 (NORMAL2). The 0x63 is used by
* older firmware version and differs from 0x66 such that
* touch pressure value needs to be adjusted. The 0x66
* opcode of newer firmware is equal to 0x63 of eKTH3500.
*/
if (ts->chip_id != EKTF3624)
break;
fallthrough;
case QUEUE_HEADER_NORMAL:
report_count = ts->buf[FW_HDR_COUNT];
if (report_count == 0 || report_count > 3) {
dev_err(&client->dev,
"bad report count: %*ph\n",
HEADER_SIZE, ts->buf);
break;
}
report_len = ts->buf[FW_HDR_LENGTH] / report_count;
if (report_len == PACKET_SIZE_OLD &&
ts->chip_id == EKTF3624) {
dev_dbg_once(&client->dev,
"using old report format\n");
} else if (report_len != PACKET_SIZE) {
dev_err(&client->dev,
"mismatching report length: %*ph\n",
HEADER_SIZE, ts->buf);
break;
}
for (i = 0; i < report_count; i++) {
u8 *buf = ts->buf + HEADER_SIZE +
i * report_len;
elants_i2c_event(ts, buf, report_len);
}
break;
default:
dev_err(&client->dev, "unknown packet %*ph\n",
HEADER_SIZE, ts->buf);
break;
}
break;
}
out:
return IRQ_HANDLED;
}
/*
* sysfs interface
*/
static ssize_t calibrate_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct elants_data *ts = i2c_get_clientdata(client);
int error;
error = mutex_lock_interruptible(&ts->sysfs_mutex);
if (error)
return error;
error = elants_i2c_calibrate(ts);
mutex_unlock(&ts->sysfs_mutex);
return error ?: count;
}
static ssize_t write_update_fw(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct elants_data *ts = i2c_get_clientdata(client);
int error;
error = mutex_lock_interruptible(&ts->sysfs_mutex);
if (error)
return error;
error = elants_i2c_fw_update(ts);
dev_dbg(dev, "firmware update result: %d\n", error);
mutex_unlock(&ts->sysfs_mutex);
return error ?: count;
}
static ssize_t show_iap_mode(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct elants_data *ts = i2c_get_clientdata(client);
return sprintf(buf, "%s\n",
ts->iap_mode == ELAN_IAP_OPERATIONAL ?
"Normal" : "Recovery");
}
static ssize_t show_calibration_count(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_REK, 0x00, 0x01 };
u8 resp[HEADER_SIZE];
u16 rek_count;
int error;
error = elants_i2c_execute_command(client, cmd, sizeof(cmd),
resp, sizeof(resp), 1,
"read ReK status");
if (error)
return sprintf(buf, "%d\n", error);
rek_count = get_unaligned_be16(&resp[2]);
return sprintf(buf, "0x%04x\n", rek_count);
}
static DEVICE_ATTR_WO(calibrate);
static DEVICE_ATTR(iap_mode, S_IRUGO, show_iap_mode, NULL);
static DEVICE_ATTR(calibration_count, S_IRUGO, show_calibration_count, NULL);
static DEVICE_ATTR(update_fw, S_IWUSR, NULL, write_update_fw);
struct elants_version_attribute {
struct device_attribute dattr;
size_t field_offset;
size_t field_size;
};
#define __ELANTS_FIELD_SIZE(_field) \
sizeof(((struct elants_data *)NULL)->_field)
#define __ELANTS_VERIFY_SIZE(_field) \
(BUILD_BUG_ON_ZERO(__ELANTS_FIELD_SIZE(_field) > 2) + \
__ELANTS_FIELD_SIZE(_field))
#define ELANTS_VERSION_ATTR(_field) \
struct elants_version_attribute elants_ver_attr_##_field = { \
.dattr = __ATTR(_field, S_IRUGO, \
elants_version_attribute_show, NULL), \
.field_offset = offsetof(struct elants_data, _field), \
.field_size = __ELANTS_VERIFY_SIZE(_field), \
}
static ssize_t elants_version_attribute_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct elants_data *ts = i2c_get_clientdata(client);
struct elants_version_attribute *attr =
container_of(dattr, struct elants_version_attribute, dattr);
u8 *field = (u8 *)((char *)ts + attr->field_offset);
unsigned int fmt_size;
unsigned int val;
if (attr->field_size == 1) {
val = *field;
fmt_size = 2; /* 2 HEX digits */
} else {
val = *(u16 *)field;
fmt_size = 4; /* 4 HEX digits */
}
return sprintf(buf, "%0*x\n", fmt_size, val);
}
static ELANTS_VERSION_ATTR(fw_version);
static ELANTS_VERSION_ATTR(hw_version);
static ELANTS_VERSION_ATTR(test_version);
static ELANTS_VERSION_ATTR(solution_version);
static ELANTS_VERSION_ATTR(bc_version);
static ELANTS_VERSION_ATTR(iap_version);
static struct attribute *elants_attributes[] = {
&dev_attr_calibrate.attr,
&dev_attr_update_fw.attr,
&dev_attr_iap_mode.attr,
&dev_attr_calibration_count.attr,
&elants_ver_attr_fw_version.dattr.attr,
&elants_ver_attr_hw_version.dattr.attr,
&elants_ver_attr_test_version.dattr.attr,
&elants_ver_attr_solution_version.dattr.attr,
&elants_ver_attr_bc_version.dattr.attr,
&elants_ver_attr_iap_version.dattr.attr,
NULL
};
static const struct attribute_group elants_attribute_group = {
.attrs = elants_attributes,
};
static int elants_i2c_power_on(struct elants_data *ts)
{
int error;
/*
* If we do not have reset gpio assume platform firmware
* controls regulators and does power them on for us.
*/
if (IS_ERR_OR_NULL(ts->reset_gpio))
return 0;
error = regulator_enable(ts->vcc33);
if (error) {
dev_err(&ts->client->dev,
"failed to enable vcc33 regulator: %d\n",
error);
return error;
}
error = regulator_enable(ts->vccio);
if (error) {
dev_err(&ts->client->dev,
"failed to enable vccio regulator: %d\n",
error);
regulator_disable(ts->vcc33);
return error;
}
/*
* We need to wait a bit after powering on controller before
* we are allowed to release reset GPIO.
*/
usleep_range(ELAN_POWERON_DELAY_USEC, ELAN_POWERON_DELAY_USEC + 100);
gpiod_set_value_cansleep(ts->reset_gpio, 0);
msleep(ELAN_RESET_DELAY_MSEC);
return 0;
}
static void elants_i2c_power_off(void *_data)
{
struct elants_data *ts = _data;
if (!IS_ERR_OR_NULL(ts->reset_gpio)) {
/*
* Activate reset gpio to prevent leakage through the
* pin once we shut off power to the controller.
*/
gpiod_set_value_cansleep(ts->reset_gpio, 1);
regulator_disable(ts->vccio);
regulator_disable(ts->vcc33);
}
}
#ifdef CONFIG_ACPI
static const struct acpi_device_id i2c_hid_ids[] = {
{"ACPI0C50", 0 },
{"PNP0C50", 0 },
{ },
};
static const guid_t i2c_hid_guid =
GUID_INIT(0x3CDFF6F7, 0x4267, 0x4555,
0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE);
static bool elants_acpi_is_hid_device(struct device *dev)
{
acpi_handle handle = ACPI_HANDLE(dev);
union acpi_object *obj;
if (acpi_match_device_ids(ACPI_COMPANION(dev), i2c_hid_ids))
return false;
obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL, ACPI_TYPE_INTEGER);
if (obj) {
ACPI_FREE(obj);
return true;
}
return false;
}
#else
static bool elants_acpi_is_hid_device(struct device *dev)
{
return false;
}
#endif
static int elants_i2c_probe(struct i2c_client *client)
{
union i2c_smbus_data dummy;
struct elants_data *ts;
unsigned long irqflags;
int error;
/* Don't bind to i2c-hid compatible devices, these are handled by the i2c-hid drv. */
if (elants_acpi_is_hid_device(&client->dev)) {
dev_warn(&client->dev, "This device appears to be an I2C-HID device, not binding\n");
return -ENODEV;
}
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "I2C check functionality error\n");
return -ENXIO;
}
ts = devm_kzalloc(&client->dev, sizeof(struct elants_data), GFP_KERNEL);
if (!ts)
return -ENOMEM;
mutex_init(&ts->sysfs_mutex);
init_completion(&ts->cmd_done);
ts->client = client;
ts->chip_id = (enum elants_chip_id)(uintptr_t)device_get_match_data(&client->dev);
i2c_set_clientdata(client, ts);
ts->vcc33 = devm_regulator_get(&client->dev, "vcc33");
if (IS_ERR(ts->vcc33))
return dev_err_probe(&client->dev, PTR_ERR(ts->vcc33),
"Failed to get 'vcc33' regulator\n");
ts->vccio = devm_regulator_get(&client->dev, "vccio");
if (IS_ERR(ts->vccio))
return dev_err_probe(&client->dev, PTR_ERR(ts->vccio),
"Failed to get 'vccio' regulator\n");
ts->reset_gpio = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(ts->reset_gpio)) {
error = PTR_ERR(ts->reset_gpio);
if (error == -EPROBE_DEFER)
return error;
if (error != -ENOENT && error != -ENOSYS) {
dev_err(&client->dev,
"failed to get reset gpio: %d\n",
error);
return error;
}
ts->keep_power_in_suspend = true;
}
error = elants_i2c_power_on(ts);
if (error)
return error;
error = devm_add_action_or_reset(&client->dev,
elants_i2c_power_off, ts);
if (error) {
dev_err(&client->dev,
"failed to install power off action: %d\n", error);
return error;
}
/* Make sure there is something at this address */
if (i2c_smbus_xfer(client->adapter, client->addr, 0,
I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) {
dev_err(&client->dev, "nothing at this address\n");
return -ENXIO;
}
error = elants_i2c_initialize(ts);
if (error) {
dev_err(&client->dev, "failed to initialize: %d\n", error);
return error;
}
ts->input = devm_input_allocate_device(&client->dev);
if (!ts->input) {
dev_err(&client->dev, "Failed to allocate input device\n");
return -ENOMEM;
}
ts->input->name = "Elan Touchscreen";
ts->input->id.bustype = BUS_I2C;
/* Multitouch input params setup */
input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, ts->x_max, 0, 0);
input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, ts->y_max, 0, 0);
input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0);
input_set_abs_params(ts->input, ABS_MT_TOOL_TYPE,
0, MT_TOOL_PALM, 0, 0);
touchscreen_parse_properties(ts->input, true, &ts->prop);
if (ts->chip_id == EKTF3624 && ts->phy_x && ts->phy_y) {
/* calculate resolution from size */
ts->x_res = DIV_ROUND_CLOSEST(ts->prop.max_x, ts->phy_x);
ts->y_res = DIV_ROUND_CLOSEST(ts->prop.max_y, ts->phy_y);
}
input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->x_res);
input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->y_res);
input_abs_set_res(ts->input, ABS_MT_TOUCH_MAJOR, ts->major_res);
error = input_mt_init_slots(ts->input, MAX_CONTACT_NUM,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
if (error) {
dev_err(&client->dev,
"failed to initialize MT slots: %d\n", error);
return error;
}
error = input_register_device(ts->input);
if (error) {
dev_err(&client->dev,
"unable to register input device: %d\n", error);
return error;
}
/*
* Platform code (ACPI, DTS) should normally set up interrupt
* for us, but in case it did not let's fall back to using falling
* edge to be compatible with older Chromebooks.
*/
irqflags = irq_get_trigger_type(client->irq);
if (!irqflags)
irqflags = IRQF_TRIGGER_FALLING;
error = devm_request_threaded_irq(&client->dev, client->irq,
NULL, elants_i2c_irq,
irqflags | IRQF_ONESHOT,
client->name, ts);
if (error) {
dev_err(&client->dev, "Failed to register interrupt\n");
return error;
}
error = devm_device_add_group(&client->dev, &elants_attribute_group);
if (error) {
dev_err(&client->dev, "failed to create sysfs attributes: %d\n",
error);
return error;
}
return 0;
}
static int elants_i2c_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct elants_data *ts = i2c_get_clientdata(client);
const u8 set_sleep_cmd[] = {
CMD_HEADER_WRITE, E_POWER_STATE_SLEEP, 0x00, 0x01
};
int retry_cnt;
int error;
/* Command not support in IAP recovery mode */
if (ts->iap_mode != ELAN_IAP_OPERATIONAL)
return -EBUSY;
disable_irq(client->irq);
if (device_may_wakeup(dev)) {
/*
* The device will automatically enter idle mode
* that has reduced power consumption.
*/
return 0;
} else if (ts->keep_power_in_suspend) {
for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) {
error = elants_i2c_send(client, set_sleep_cmd,
sizeof(set_sleep_cmd));
if (!error)
break;
dev_err(&client->dev,
"suspend command failed: %d\n", error);
}
} else {
elants_i2c_power_off(ts);
}
return 0;
}
static int elants_i2c_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct elants_data *ts = i2c_get_clientdata(client);
const u8 set_active_cmd[] = {
CMD_HEADER_WRITE, E_POWER_STATE_RESUME, 0x00, 0x01
};
int retry_cnt;
int error;
if (device_may_wakeup(dev)) {
elants_i2c_sw_reset(client);
} else if (ts->keep_power_in_suspend) {
for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) {
error = elants_i2c_send(client, set_active_cmd,
sizeof(set_active_cmd));
if (!error)
break;
dev_err(&client->dev,
"resume command failed: %d\n", error);
}
} else {
elants_i2c_power_on(ts);
elants_i2c_initialize(ts);
}
ts->state = ELAN_STATE_NORMAL;
enable_irq(client->irq);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(elants_i2c_pm_ops,
elants_i2c_suspend, elants_i2c_resume);
static const struct i2c_device_id elants_i2c_id[] = {
{ DEVICE_NAME, EKTH3500 },
{ "ekth3500", EKTH3500 },
{ "ektf3624", EKTF3624 },
{ }
};
MODULE_DEVICE_TABLE(i2c, elants_i2c_id);
#ifdef CONFIG_ACPI
static const struct acpi_device_id elants_acpi_id[] = {
{ "ELAN0001", EKTH3500 },
{ }
};
MODULE_DEVICE_TABLE(acpi, elants_acpi_id);
#endif
#ifdef CONFIG_OF
static const struct of_device_id elants_of_match[] = {
{ .compatible = "elan,ekth3500", .data = (void *)EKTH3500 },
{ .compatible = "elan,ektf3624", .data = (void *)EKTF3624 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, elants_of_match);
#endif
static struct i2c_driver elants_i2c_driver = {
.probe = elants_i2c_probe,
.id_table = elants_i2c_id,
.driver = {
.name = DEVICE_NAME,
.pm = pm_sleep_ptr(&elants_i2c_pm_ops),
.acpi_match_table = ACPI_PTR(elants_acpi_id),
.of_match_table = of_match_ptr(elants_of_match),
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
};
module_i2c_driver(elants_i2c_driver);
MODULE_AUTHOR("Scott Liu <[email protected]>");
MODULE_DESCRIPTION("Elan I2c Touchscreen driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/elants_i2c.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* STMicroelectronics STMPE811 Touchscreen Driver
*
* (C) 2010 Luotao Fu <[email protected]>
* All rights reserved.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/input/touchscreen.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/workqueue.h>
#include <linux/mfd/stmpe.h>
/* Register layouts and functionalities are identical on all stmpexxx variants
* with touchscreen controller
*/
#define STMPE_REG_INT_STA 0x0B
#define STMPE_REG_TSC_CTRL 0x40
#define STMPE_REG_TSC_CFG 0x41
#define STMPE_REG_FIFO_TH 0x4A
#define STMPE_REG_FIFO_STA 0x4B
#define STMPE_REG_FIFO_SIZE 0x4C
#define STMPE_REG_TSC_DATA_XYZ 0x52
#define STMPE_REG_TSC_FRACTION_Z 0x56
#define STMPE_REG_TSC_I_DRIVE 0x58
#define OP_MOD_XYZ 0
#define STMPE_TSC_CTRL_TSC_EN (1<<0)
#define STMPE_FIFO_STA_RESET (1<<0)
#define STMPE_IRQ_TOUCH_DET 0
#define STMPE_TS_NAME "stmpe-ts"
#define XY_MASK 0xfff
/**
* struct stmpe_touch - stmpe811 touch screen controller state
* @stmpe: pointer back to STMPE MFD container
* @idev: registered input device
* @work: a work item used to scan the device
* @dev: a pointer back to the MFD cell struct device*
* @prop: Touchscreen properties
* @ave_ctrl: Sample average control
* (0 -> 1 sample, 1 -> 2 samples, 2 -> 4 samples, 3 -> 8 samples)
* @touch_det_delay: Touch detect interrupt delay
* (0 -> 10 us, 1 -> 50 us, 2 -> 100 us, 3 -> 500 us,
* 4-> 1 ms, 5 -> 5 ms, 6 -> 10 ms, 7 -> 50 ms)
* recommended is 3
* @settling: Panel driver settling time
* (0 -> 10 us, 1 -> 100 us, 2 -> 500 us, 3 -> 1 ms,
* 4 -> 5 ms, 5 -> 10 ms, 6 for 50 ms, 7 -> 100 ms)
* recommended is 2
* @fraction_z: Length of the fractional part in z
* (fraction_z ([0..7]) = Count of the fractional part)
* recommended is 7
* @i_drive: current limit value of the touchscreen drivers
* (0 -> 20 mA typical 35 mA max, 1 -> 50 mA typical 80 mA max)
*/
struct stmpe_touch {
struct stmpe *stmpe;
struct input_dev *idev;
struct delayed_work work;
struct device *dev;
struct touchscreen_properties prop;
u8 ave_ctrl;
u8 touch_det_delay;
u8 settling;
u8 fraction_z;
u8 i_drive;
};
static int __stmpe_reset_fifo(struct stmpe *stmpe)
{
int ret;
ret = stmpe_set_bits(stmpe, STMPE_REG_FIFO_STA,
STMPE_FIFO_STA_RESET, STMPE_FIFO_STA_RESET);
if (ret)
return ret;
return stmpe_set_bits(stmpe, STMPE_REG_FIFO_STA,
STMPE_FIFO_STA_RESET, 0);
}
static void stmpe_work(struct work_struct *work)
{
int int_sta;
u32 timeout = 40;
struct stmpe_touch *ts =
container_of(work, struct stmpe_touch, work.work);
int_sta = stmpe_reg_read(ts->stmpe, STMPE_REG_INT_STA);
/*
* touch_det sometimes get desasserted or just get stuck. This appears
* to be a silicon bug, We still have to clearify this with the
* manufacture. As a workaround We release the key anyway if the
* touch_det keeps coming in after 4ms, while the FIFO contains no value
* during the whole time.
*/
while ((int_sta & (1 << STMPE_IRQ_TOUCH_DET)) && (timeout > 0)) {
timeout--;
int_sta = stmpe_reg_read(ts->stmpe, STMPE_REG_INT_STA);
udelay(100);
}
/* reset the FIFO before we report release event */
__stmpe_reset_fifo(ts->stmpe);
input_report_abs(ts->idev, ABS_PRESSURE, 0);
input_report_key(ts->idev, BTN_TOUCH, 0);
input_sync(ts->idev);
}
static irqreturn_t stmpe_ts_handler(int irq, void *data)
{
u8 data_set[4];
int x, y, z;
struct stmpe_touch *ts = data;
/*
* Cancel scheduled polling for release if we have new value
* available. Wait if the polling is already running.
*/
cancel_delayed_work_sync(&ts->work);
/*
* The FIFO sometimes just crashes and stops generating interrupts. This
* appears to be a silicon bug. We still have to clearify this with
* the manufacture. As a workaround we disable the TSC while we are
* collecting data and flush the FIFO after reading
*/
stmpe_set_bits(ts->stmpe, STMPE_REG_TSC_CTRL,
STMPE_TSC_CTRL_TSC_EN, 0);
stmpe_block_read(ts->stmpe, STMPE_REG_TSC_DATA_XYZ, 4, data_set);
x = (data_set[0] << 4) | (data_set[1] >> 4);
y = ((data_set[1] & 0xf) << 8) | data_set[2];
z = data_set[3];
touchscreen_report_pos(ts->idev, &ts->prop, x, y, false);
input_report_abs(ts->idev, ABS_PRESSURE, z);
input_report_key(ts->idev, BTN_TOUCH, 1);
input_sync(ts->idev);
/* flush the FIFO after we have read out our values. */
__stmpe_reset_fifo(ts->stmpe);
/* reenable the tsc */
stmpe_set_bits(ts->stmpe, STMPE_REG_TSC_CTRL,
STMPE_TSC_CTRL_TSC_EN, STMPE_TSC_CTRL_TSC_EN);
/* start polling for touch_det to detect release */
schedule_delayed_work(&ts->work, msecs_to_jiffies(50));
return IRQ_HANDLED;
}
static int stmpe_init_hw(struct stmpe_touch *ts)
{
int ret;
u8 tsc_cfg, tsc_cfg_mask;
struct stmpe *stmpe = ts->stmpe;
struct device *dev = ts->dev;
ret = stmpe_enable(stmpe, STMPE_BLOCK_TOUCHSCREEN | STMPE_BLOCK_ADC);
if (ret) {
dev_err(dev, "Could not enable clock for ADC and TS\n");
return ret;
}
ret = stmpe811_adc_common_init(stmpe);
if (ret) {
stmpe_disable(stmpe, STMPE_BLOCK_TOUCHSCREEN | STMPE_BLOCK_ADC);
return ret;
}
tsc_cfg = STMPE_AVE_CTRL(ts->ave_ctrl) |
STMPE_DET_DELAY(ts->touch_det_delay) |
STMPE_SETTLING(ts->settling);
tsc_cfg_mask = STMPE_AVE_CTRL(0xff) | STMPE_DET_DELAY(0xff) |
STMPE_SETTLING(0xff);
ret = stmpe_set_bits(stmpe, STMPE_REG_TSC_CFG, tsc_cfg_mask, tsc_cfg);
if (ret) {
dev_err(dev, "Could not config touch\n");
return ret;
}
ret = stmpe_set_bits(stmpe, STMPE_REG_TSC_FRACTION_Z,
STMPE_FRACTION_Z(0xff), STMPE_FRACTION_Z(ts->fraction_z));
if (ret) {
dev_err(dev, "Could not config touch\n");
return ret;
}
ret = stmpe_set_bits(stmpe, STMPE_REG_TSC_I_DRIVE,
STMPE_I_DRIVE(0xff), STMPE_I_DRIVE(ts->i_drive));
if (ret) {
dev_err(dev, "Could not config touch\n");
return ret;
}
/* set FIFO to 1 for single point reading */
ret = stmpe_reg_write(stmpe, STMPE_REG_FIFO_TH, 1);
if (ret) {
dev_err(dev, "Could not set FIFO\n");
return ret;
}
ret = stmpe_set_bits(stmpe, STMPE_REG_TSC_CTRL,
STMPE_OP_MODE(0xff), STMPE_OP_MODE(OP_MOD_XYZ));
if (ret) {
dev_err(dev, "Could not set mode\n");
return ret;
}
return 0;
}
static int stmpe_ts_open(struct input_dev *dev)
{
struct stmpe_touch *ts = input_get_drvdata(dev);
int ret = 0;
ret = __stmpe_reset_fifo(ts->stmpe);
if (ret)
return ret;
return stmpe_set_bits(ts->stmpe, STMPE_REG_TSC_CTRL,
STMPE_TSC_CTRL_TSC_EN, STMPE_TSC_CTRL_TSC_EN);
}
static void stmpe_ts_close(struct input_dev *dev)
{
struct stmpe_touch *ts = input_get_drvdata(dev);
cancel_delayed_work_sync(&ts->work);
stmpe_set_bits(ts->stmpe, STMPE_REG_TSC_CTRL,
STMPE_TSC_CTRL_TSC_EN, 0);
}
static void stmpe_ts_get_platform_info(struct platform_device *pdev,
struct stmpe_touch *ts)
{
struct device_node *np = pdev->dev.of_node;
u32 val;
if (np) {
if (!of_property_read_u32(np, "st,sample-time", &val))
ts->stmpe->sample_time = val;
if (!of_property_read_u32(np, "st,mod-12b", &val))
ts->stmpe->mod_12b = val;
if (!of_property_read_u32(np, "st,ref-sel", &val))
ts->stmpe->ref_sel = val;
if (!of_property_read_u32(np, "st,adc-freq", &val))
ts->stmpe->adc_freq = val;
if (!of_property_read_u32(np, "st,ave-ctrl", &val))
ts->ave_ctrl = val;
if (!of_property_read_u32(np, "st,touch-det-delay", &val))
ts->touch_det_delay = val;
if (!of_property_read_u32(np, "st,settling", &val))
ts->settling = val;
if (!of_property_read_u32(np, "st,fraction-z", &val))
ts->fraction_z = val;
if (!of_property_read_u32(np, "st,i-drive", &val))
ts->i_drive = val;
}
}
static int stmpe_input_probe(struct platform_device *pdev)
{
struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);
struct stmpe_touch *ts;
struct input_dev *idev;
int error;
int ts_irq;
ts_irq = platform_get_irq_byname(pdev, "FIFO_TH");
if (ts_irq < 0)
return ts_irq;
ts = devm_kzalloc(&pdev->dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
idev = devm_input_allocate_device(&pdev->dev);
if (!idev)
return -ENOMEM;
platform_set_drvdata(pdev, ts);
ts->stmpe = stmpe;
ts->idev = idev;
ts->dev = &pdev->dev;
stmpe_ts_get_platform_info(pdev, ts);
INIT_DELAYED_WORK(&ts->work, stmpe_work);
error = devm_request_threaded_irq(&pdev->dev, ts_irq,
NULL, stmpe_ts_handler,
IRQF_ONESHOT, STMPE_TS_NAME, ts);
if (error) {
dev_err(&pdev->dev, "Failed to request IRQ %d\n", ts_irq);
return error;
}
error = stmpe_init_hw(ts);
if (error)
return error;
idev->name = STMPE_TS_NAME;
idev->phys = STMPE_TS_NAME"/input0";
idev->id.bustype = BUS_I2C;
idev->open = stmpe_ts_open;
idev->close = stmpe_ts_close;
input_set_drvdata(idev, ts);
input_set_capability(idev, EV_KEY, BTN_TOUCH);
input_set_abs_params(idev, ABS_X, 0, XY_MASK, 0, 0);
input_set_abs_params(idev, ABS_Y, 0, XY_MASK, 0, 0);
input_set_abs_params(idev, ABS_PRESSURE, 0x0, 0xff, 0, 0);
touchscreen_parse_properties(idev, false, &ts->prop);
error = input_register_device(idev);
if (error) {
dev_err(&pdev->dev, "Could not register input device\n");
return error;
}
return 0;
}
static int stmpe_ts_remove(struct platform_device *pdev)
{
struct stmpe_touch *ts = platform_get_drvdata(pdev);
stmpe_disable(ts->stmpe, STMPE_BLOCK_TOUCHSCREEN);
return 0;
}
static struct platform_driver stmpe_ts_driver = {
.driver = {
.name = STMPE_TS_NAME,
},
.probe = stmpe_input_probe,
.remove = stmpe_ts_remove,
};
module_platform_driver(stmpe_ts_driver);
static const struct of_device_id stmpe_ts_ids[] = {
{ .compatible = "st,stmpe-ts", },
{ },
};
MODULE_DEVICE_TABLE(of, stmpe_ts_ids);
MODULE_AUTHOR("Luotao Fu <[email protected]>");
MODULE_DESCRIPTION("STMPEXXX touchscreen driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/stmpe-ts.c
|
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/bits.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/regulator/consumer.h>
#define IST3038C_HIB_ACCESS (0x800B << 16)
#define IST3038C_DIRECT_ACCESS BIT(31)
#define IST3038C_REG_CHIPID 0x40001000
#define IST3038C_REG_HIB_BASE 0x30000100
#define IST3038C_REG_TOUCH_STATUS (IST3038C_REG_HIB_BASE | IST3038C_HIB_ACCESS)
#define IST3038C_REG_TOUCH_COORD (IST3038C_REG_HIB_BASE | IST3038C_HIB_ACCESS | 0x8)
#define IST3038C_REG_INTR_MESSAGE (IST3038C_REG_HIB_BASE | IST3038C_HIB_ACCESS | 0x4)
#define IST3038C_WHOAMI 0x38c
#define IST3038C_CHIP_ON_DELAY_MS 60
#define IST3038C_I2C_RETRY_COUNT 3
#define IST3038C_MAX_FINGER_NUM 10
#define IST3038C_X_MASK GENMASK(23, 12)
#define IST3038C_X_SHIFT 12
#define IST3038C_Y_MASK GENMASK(11, 0)
#define IST3038C_AREA_MASK GENMASK(27, 24)
#define IST3038C_AREA_SHIFT 24
#define IST3038C_FINGER_COUNT_MASK GENMASK(15, 12)
#define IST3038C_FINGER_COUNT_SHIFT 12
#define IST3038C_FINGER_STATUS_MASK GENMASK(9, 0)
struct imagis_ts {
struct i2c_client *client;
struct input_dev *input_dev;
struct touchscreen_properties prop;
struct regulator_bulk_data supplies[2];
};
static int imagis_i2c_read_reg(struct imagis_ts *ts,
unsigned int reg, u32 *data)
{
__be32 ret_be;
__be32 reg_be = cpu_to_be32(reg);
struct i2c_msg msg[] = {
{
.addr = ts->client->addr,
.flags = 0,
.buf = (unsigned char *)®_be,
.len = sizeof(reg_be),
}, {
.addr = ts->client->addr,
.flags = I2C_M_RD,
.buf = (unsigned char *)&ret_be,
.len = sizeof(ret_be),
},
};
int ret, error;
int retry = IST3038C_I2C_RETRY_COUNT;
/* Retry in case the controller fails to respond */
do {
ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
if (ret == ARRAY_SIZE(msg)) {
*data = be32_to_cpu(ret_be);
return 0;
}
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"%s - i2c_transfer failed: %d (%d)\n",
__func__, error, ret);
} while (--retry);
return error;
}
static irqreturn_t imagis_interrupt(int irq, void *dev_id)
{
struct imagis_ts *ts = dev_id;
u32 intr_message, finger_status;
unsigned int finger_count, finger_pressed;
int i;
int error;
error = imagis_i2c_read_reg(ts, IST3038C_REG_INTR_MESSAGE,
&intr_message);
if (error) {
dev_err(&ts->client->dev,
"failed to read the interrupt message: %d\n", error);
goto out;
}
finger_count = (intr_message & IST3038C_FINGER_COUNT_MASK) >>
IST3038C_FINGER_COUNT_SHIFT;
if (finger_count > IST3038C_MAX_FINGER_NUM) {
dev_err(&ts->client->dev,
"finger count %d is more than maximum supported\n",
finger_count);
goto out;
}
finger_pressed = intr_message & IST3038C_FINGER_STATUS_MASK;
for (i = 0; i < finger_count; i++) {
error = imagis_i2c_read_reg(ts,
IST3038C_REG_TOUCH_COORD + (i * 4),
&finger_status);
if (error) {
dev_err(&ts->client->dev,
"failed to read coordinates for finger %d: %d\n",
i, error);
goto out;
}
input_mt_slot(ts->input_dev, i);
input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER,
finger_pressed & BIT(i));
touchscreen_report_pos(ts->input_dev, &ts->prop,
(finger_status & IST3038C_X_MASK) >>
IST3038C_X_SHIFT,
finger_status & IST3038C_Y_MASK, 1);
input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR,
(finger_status & IST3038C_AREA_MASK) >>
IST3038C_AREA_SHIFT);
}
input_mt_sync_frame(ts->input_dev);
input_sync(ts->input_dev);
out:
return IRQ_HANDLED;
}
static void imagis_power_off(void *_ts)
{
struct imagis_ts *ts = _ts;
regulator_bulk_disable(ARRAY_SIZE(ts->supplies), ts->supplies);
}
static int imagis_power_on(struct imagis_ts *ts)
{
int error;
error = regulator_bulk_enable(ARRAY_SIZE(ts->supplies), ts->supplies);
if (error)
return error;
msleep(IST3038C_CHIP_ON_DELAY_MS);
return 0;
}
static int imagis_start(struct imagis_ts *ts)
{
int error;
error = imagis_power_on(ts);
if (error)
return error;
enable_irq(ts->client->irq);
return 0;
}
static int imagis_stop(struct imagis_ts *ts)
{
disable_irq(ts->client->irq);
imagis_power_off(ts);
return 0;
}
static int imagis_input_open(struct input_dev *dev)
{
struct imagis_ts *ts = input_get_drvdata(dev);
return imagis_start(ts);
}
static void imagis_input_close(struct input_dev *dev)
{
struct imagis_ts *ts = input_get_drvdata(dev);
imagis_stop(ts);
}
static int imagis_init_input_dev(struct imagis_ts *ts)
{
struct input_dev *input_dev;
int error;
input_dev = devm_input_allocate_device(&ts->client->dev);
if (!input_dev)
return -ENOMEM;
ts->input_dev = input_dev;
input_dev->name = "Imagis capacitive touchscreen";
input_dev->phys = "input/ts";
input_dev->id.bustype = BUS_I2C;
input_dev->open = imagis_input_open;
input_dev->close = imagis_input_close;
input_set_drvdata(input_dev, ts);
input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
touchscreen_parse_properties(input_dev, true, &ts->prop);
if (!ts->prop.max_x || !ts->prop.max_y) {
dev_err(&ts->client->dev,
"Touchscreen-size-x and/or touchscreen-size-y not set in dts\n");
return -EINVAL;
}
error = input_mt_init_slots(input_dev,
IST3038C_MAX_FINGER_NUM,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
if (error) {
dev_err(&ts->client->dev,
"Failed to initialize MT slots: %d", error);
return error;
}
error = input_register_device(input_dev);
if (error) {
dev_err(&ts->client->dev,
"Failed to register input device: %d", error);
return error;
}
return 0;
}
static int imagis_init_regulators(struct imagis_ts *ts)
{
struct i2c_client *client = ts->client;
ts->supplies[0].supply = "vdd";
ts->supplies[1].supply = "vddio";
return devm_regulator_bulk_get(&client->dev,
ARRAY_SIZE(ts->supplies),
ts->supplies);
}
static int imagis_probe(struct i2c_client *i2c)
{
struct device *dev = &i2c->dev;
struct imagis_ts *ts;
int chip_id, error;
ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
ts->client = i2c;
error = imagis_init_regulators(ts);
if (error) {
dev_err(dev, "regulator init error: %d\n", error);
return error;
}
error = imagis_power_on(ts);
if (error) {
dev_err(dev, "failed to enable regulators: %d\n", error);
return error;
}
error = devm_add_action_or_reset(dev, imagis_power_off, ts);
if (error) {
dev_err(dev, "failed to install poweroff action: %d\n", error);
return error;
}
error = imagis_i2c_read_reg(ts,
IST3038C_REG_CHIPID | IST3038C_DIRECT_ACCESS,
&chip_id);
if (error) {
dev_err(dev, "chip ID read failure: %d\n", error);
return error;
}
if (chip_id != IST3038C_WHOAMI) {
dev_err(dev, "unknown chip ID: 0x%x\n", chip_id);
return -EINVAL;
}
error = devm_request_threaded_irq(dev, i2c->irq,
NULL, imagis_interrupt,
IRQF_ONESHOT | IRQF_NO_AUTOEN,
"imagis-touchscreen", ts);
if (error) {
dev_err(dev, "IRQ %d allocation failure: %d\n",
i2c->irq, error);
return error;
}
error = imagis_init_input_dev(ts);
if (error)
return error;
return 0;
}
static int imagis_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct imagis_ts *ts = i2c_get_clientdata(client);
int retval = 0;
mutex_lock(&ts->input_dev->mutex);
if (input_device_enabled(ts->input_dev))
retval = imagis_stop(ts);
mutex_unlock(&ts->input_dev->mutex);
return retval;
}
static int imagis_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct imagis_ts *ts = i2c_get_clientdata(client);
int retval = 0;
mutex_lock(&ts->input_dev->mutex);
if (input_device_enabled(ts->input_dev))
retval = imagis_start(ts);
mutex_unlock(&ts->input_dev->mutex);
return retval;
}
static DEFINE_SIMPLE_DEV_PM_OPS(imagis_pm_ops, imagis_suspend, imagis_resume);
#ifdef CONFIG_OF
static const struct of_device_id imagis_of_match[] = {
{ .compatible = "imagis,ist3038c", },
{ },
};
MODULE_DEVICE_TABLE(of, imagis_of_match);
#endif
static struct i2c_driver imagis_ts_driver = {
.driver = {
.name = "imagis-touchscreen",
.pm = pm_sleep_ptr(&imagis_pm_ops),
.of_match_table = of_match_ptr(imagis_of_match),
},
.probe = imagis_probe,
};
module_i2c_driver(imagis_ts_driver);
MODULE_DESCRIPTION("Imagis IST3038C Touchscreen Driver");
MODULE_AUTHOR("Markuss Broks <[email protected]>");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/imagis.c
|
/*
* Weida HiTech WDT87xx TouchScreen I2C driver
*
* Copyright (c) 2015 Weida Hi-Tech Co., Ltd.
* HN Chen <[email protected]>
*
* This software is licensed under the terms of the GNU General Public
* License, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*/
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/firmware.h>
#include <linux/input/mt.h>
#include <linux/acpi.h>
#include <asm/unaligned.h>
#define WDT87XX_NAME "wdt87xx_i2c"
#define WDT87XX_FW_NAME "wdt87xx_fw.bin"
#define WDT87XX_CFG_NAME "wdt87xx_cfg.bin"
#define MODE_ACTIVE 0x01
#define MODE_READY 0x02
#define MODE_IDLE 0x03
#define MODE_SLEEP 0x04
#define MODE_STOP 0xFF
#define WDT_MAX_FINGER 10
#define WDT_RAW_BUF_COUNT 54
#define WDT_V1_RAW_BUF_COUNT 74
#define WDT_FIRMWARE_ID 0xa9e368f5
#define PG_SIZE 0x1000
#define MAX_RETRIES 3
#define MAX_UNIT_AXIS 0x7FFF
#define PKT_READ_SIZE 72
#define PKT_WRITE_SIZE 80
/* the finger definition of the report event */
#define FINGER_EV_OFFSET_ID 0
#define FINGER_EV_OFFSET_X 1
#define FINGER_EV_OFFSET_Y 3
#define FINGER_EV_SIZE 5
#define FINGER_EV_V1_OFFSET_ID 0
#define FINGER_EV_V1_OFFSET_W 1
#define FINGER_EV_V1_OFFSET_P 2
#define FINGER_EV_V1_OFFSET_X 3
#define FINGER_EV_V1_OFFSET_Y 5
#define FINGER_EV_V1_SIZE 7
/* The definition of a report packet */
#define TOUCH_PK_OFFSET_REPORT_ID 0
#define TOUCH_PK_OFFSET_EVENT 1
#define TOUCH_PK_OFFSET_SCAN_TIME 51
#define TOUCH_PK_OFFSET_FNGR_NUM 53
#define TOUCH_PK_V1_OFFSET_REPORT_ID 0
#define TOUCH_PK_V1_OFFSET_EVENT 1
#define TOUCH_PK_V1_OFFSET_SCAN_TIME 71
#define TOUCH_PK_V1_OFFSET_FNGR_NUM 73
/* The definition of the controller parameters */
#define CTL_PARAM_OFFSET_FW_ID 0
#define CTL_PARAM_OFFSET_PLAT_ID 2
#define CTL_PARAM_OFFSET_XMLS_ID1 4
#define CTL_PARAM_OFFSET_XMLS_ID2 6
#define CTL_PARAM_OFFSET_PHY_CH_X 8
#define CTL_PARAM_OFFSET_PHY_CH_Y 10
#define CTL_PARAM_OFFSET_PHY_X0 12
#define CTL_PARAM_OFFSET_PHY_X1 14
#define CTL_PARAM_OFFSET_PHY_Y0 16
#define CTL_PARAM_OFFSET_PHY_Y1 18
#define CTL_PARAM_OFFSET_PHY_W 22
#define CTL_PARAM_OFFSET_PHY_H 24
#define CTL_PARAM_OFFSET_FACTOR 32
/* The definition of the device descriptor */
#define WDT_GD_DEVICE 1
#define DEV_DESC_OFFSET_VID 8
#define DEV_DESC_OFFSET_PID 10
/* Communication commands */
#define PACKET_SIZE 56
#define VND_REQ_READ 0x06
#define VND_READ_DATA 0x07
#define VND_REQ_WRITE 0x08
#define VND_CMD_START 0x00
#define VND_CMD_STOP 0x01
#define VND_CMD_RESET 0x09
#define VND_CMD_ERASE 0x1A
#define VND_GET_CHECKSUM 0x66
#define VND_SET_DATA 0x83
#define VND_SET_COMMAND_DATA 0x84
#define VND_SET_CHECKSUM_CALC 0x86
#define VND_SET_CHECKSUM_LENGTH 0x87
#define VND_CMD_SFLCK 0xFC
#define VND_CMD_SFUNL 0xFD
#define CMD_SFLCK_KEY 0xC39B
#define CMD_SFUNL_KEY 0x95DA
#define STRIDX_PLATFORM_ID 0x80
#define STRIDX_PARAMETERS 0x81
#define CMD_BUF_SIZE 8
#define PKT_BUF_SIZE 64
/* The definition of the command packet */
#define CMD_REPORT_ID_OFFSET 0x0
#define CMD_TYPE_OFFSET 0x1
#define CMD_INDEX_OFFSET 0x2
#define CMD_KEY_OFFSET 0x3
#define CMD_LENGTH_OFFSET 0x4
#define CMD_DATA_OFFSET 0x8
/* The definition of firmware chunk tags */
#define FOURCC_ID_RIFF 0x46464952
#define FOURCC_ID_WHIF 0x46494857
#define FOURCC_ID_FRMT 0x544D5246
#define FOURCC_ID_FRWR 0x52575246
#define FOURCC_ID_CNFG 0x47464E43
#define CHUNK_ID_FRMT FOURCC_ID_FRMT
#define CHUNK_ID_FRWR FOURCC_ID_FRWR
#define CHUNK_ID_CNFG FOURCC_ID_CNFG
#define FW_FOURCC1_OFFSET 0
#define FW_SIZE_OFFSET 4
#define FW_FOURCC2_OFFSET 8
#define FW_PAYLOAD_OFFSET 40
#define FW_CHUNK_ID_OFFSET 0
#define FW_CHUNK_SIZE_OFFSET 4
#define FW_CHUNK_TGT_START_OFFSET 8
#define FW_CHUNK_PAYLOAD_LEN_OFFSET 12
#define FW_CHUNK_SRC_START_OFFSET 16
#define FW_CHUNK_VERSION_OFFSET 20
#define FW_CHUNK_ATTR_OFFSET 24
#define FW_CHUNK_PAYLOAD_OFFSET 32
/* Controller requires minimum 300us between commands */
#define WDT_COMMAND_DELAY_MS 2
#define WDT_FLASH_WRITE_DELAY_MS 4
#define WDT_FLASH_ERASE_DELAY_MS 200
#define WDT_FW_RESET_TIME 2500
struct wdt87xx_sys_param {
u16 fw_id;
u16 plat_id;
u16 xmls_id1;
u16 xmls_id2;
u16 phy_ch_x;
u16 phy_ch_y;
u16 phy_w;
u16 phy_h;
u16 scaling_factor;
u32 max_x;
u32 max_y;
u16 vendor_id;
u16 product_id;
};
struct wdt87xx_data {
struct i2c_client *client;
struct input_dev *input;
/* Mutex for fw update to prevent concurrent access */
struct mutex fw_mutex;
struct wdt87xx_sys_param param;
u8 phys[32];
};
static int wdt87xx_i2c_xfer(struct i2c_client *client,
void *txdata, size_t txlen,
void *rxdata, size_t rxlen)
{
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = 0,
.len = txlen,
.buf = txdata,
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = rxlen,
.buf = rxdata,
},
};
int error;
int ret;
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret != ARRAY_SIZE(msgs)) {
error = ret < 0 ? ret : -EIO;
dev_err(&client->dev, "%s: i2c transfer failed: %d\n",
__func__, error);
return error;
}
return 0;
}
static int wdt87xx_get_desc(struct i2c_client *client, u8 desc_idx,
u8 *buf, size_t len)
{
u8 tx_buf[] = { 0x22, 0x00, 0x10, 0x0E, 0x23, 0x00 };
int error;
tx_buf[2] |= desc_idx & 0xF;
error = wdt87xx_i2c_xfer(client, tx_buf, sizeof(tx_buf),
buf, len);
if (error) {
dev_err(&client->dev, "get desc failed: %d\n", error);
return error;
}
if (buf[0] != len) {
dev_err(&client->dev, "unexpected response to get desc: %d\n",
buf[0]);
return -EINVAL;
}
mdelay(WDT_COMMAND_DELAY_MS);
return 0;
}
static int wdt87xx_get_string(struct i2c_client *client, u8 str_idx,
u8 *buf, size_t len)
{
u8 tx_buf[] = { 0x22, 0x00, 0x13, 0x0E, str_idx, 0x23, 0x00 };
u8 rx_buf[PKT_WRITE_SIZE];
size_t rx_len = len + 2;
int error;
if (rx_len > sizeof(rx_buf))
return -EINVAL;
error = wdt87xx_i2c_xfer(client, tx_buf, sizeof(tx_buf),
rx_buf, rx_len);
if (error) {
dev_err(&client->dev, "get string failed: %d\n", error);
return error;
}
if (rx_buf[1] != 0x03) {
dev_err(&client->dev, "unexpected response to get string: %d\n",
rx_buf[1]);
return -EINVAL;
}
rx_len = min_t(size_t, len, rx_buf[0]);
memcpy(buf, &rx_buf[2], rx_len);
mdelay(WDT_COMMAND_DELAY_MS);
return 0;
}
static int wdt87xx_get_feature(struct i2c_client *client,
u8 *buf, size_t buf_size)
{
u8 tx_buf[8];
u8 rx_buf[PKT_WRITE_SIZE];
size_t tx_len = 0;
size_t rx_len = buf_size + 2;
int error;
if (rx_len > sizeof(rx_buf))
return -EINVAL;
/* Get feature command packet */
tx_buf[tx_len++] = 0x22;
tx_buf[tx_len++] = 0x00;
if (buf[CMD_REPORT_ID_OFFSET] > 0xF) {
tx_buf[tx_len++] = 0x30;
tx_buf[tx_len++] = 0x02;
tx_buf[tx_len++] = buf[CMD_REPORT_ID_OFFSET];
} else {
tx_buf[tx_len++] = 0x30 | buf[CMD_REPORT_ID_OFFSET];
tx_buf[tx_len++] = 0x02;
}
tx_buf[tx_len++] = 0x23;
tx_buf[tx_len++] = 0x00;
error = wdt87xx_i2c_xfer(client, tx_buf, tx_len, rx_buf, rx_len);
if (error) {
dev_err(&client->dev, "get feature failed: %d\n", error);
return error;
}
rx_len = min_t(size_t, buf_size, get_unaligned_le16(rx_buf));
memcpy(buf, &rx_buf[2], rx_len);
mdelay(WDT_COMMAND_DELAY_MS);
return 0;
}
static int wdt87xx_set_feature(struct i2c_client *client,
const u8 *buf, size_t buf_size)
{
u8 tx_buf[PKT_WRITE_SIZE];
int tx_len = 0;
int error;
/* Set feature command packet */
tx_buf[tx_len++] = 0x22;
tx_buf[tx_len++] = 0x00;
if (buf[CMD_REPORT_ID_OFFSET] > 0xF) {
tx_buf[tx_len++] = 0x30;
tx_buf[tx_len++] = 0x03;
tx_buf[tx_len++] = buf[CMD_REPORT_ID_OFFSET];
} else {
tx_buf[tx_len++] = 0x30 | buf[CMD_REPORT_ID_OFFSET];
tx_buf[tx_len++] = 0x03;
}
tx_buf[tx_len++] = 0x23;
tx_buf[tx_len++] = 0x00;
tx_buf[tx_len++] = (buf_size & 0xFF);
tx_buf[tx_len++] = ((buf_size & 0xFF00) >> 8);
if (tx_len + buf_size > sizeof(tx_buf))
return -EINVAL;
memcpy(&tx_buf[tx_len], buf, buf_size);
tx_len += buf_size;
error = i2c_master_send(client, tx_buf, tx_len);
if (error < 0) {
dev_err(&client->dev, "set feature failed: %d\n", error);
return error;
}
mdelay(WDT_COMMAND_DELAY_MS);
return 0;
}
static int wdt87xx_send_command(struct i2c_client *client, int cmd, int value)
{
u8 cmd_buf[CMD_BUF_SIZE];
/* Set the command packet */
cmd_buf[CMD_REPORT_ID_OFFSET] = VND_REQ_WRITE;
cmd_buf[CMD_TYPE_OFFSET] = VND_SET_COMMAND_DATA;
put_unaligned_le16((u16)cmd, &cmd_buf[CMD_INDEX_OFFSET]);
switch (cmd) {
case VND_CMD_START:
case VND_CMD_STOP:
case VND_CMD_RESET:
/* Mode selector */
put_unaligned_le32((value & 0xFF), &cmd_buf[CMD_LENGTH_OFFSET]);
break;
case VND_CMD_SFLCK:
put_unaligned_le16(CMD_SFLCK_KEY, &cmd_buf[CMD_KEY_OFFSET]);
break;
case VND_CMD_SFUNL:
put_unaligned_le16(CMD_SFUNL_KEY, &cmd_buf[CMD_KEY_OFFSET]);
break;
case VND_CMD_ERASE:
case VND_SET_CHECKSUM_CALC:
case VND_SET_CHECKSUM_LENGTH:
put_unaligned_le32(value, &cmd_buf[CMD_KEY_OFFSET]);
break;
default:
cmd_buf[CMD_REPORT_ID_OFFSET] = 0;
dev_err(&client->dev, "Invalid command: %d\n", cmd);
return -EINVAL;
}
return wdt87xx_set_feature(client, cmd_buf, sizeof(cmd_buf));
}
static int wdt87xx_sw_reset(struct i2c_client *client)
{
int error;
dev_dbg(&client->dev, "resetting device now\n");
error = wdt87xx_send_command(client, VND_CMD_RESET, 0);
if (error) {
dev_err(&client->dev, "reset failed\n");
return error;
}
/* Wait the device to be ready */
msleep(WDT_FW_RESET_TIME);
return 0;
}
static const void *wdt87xx_get_fw_chunk(const struct firmware *fw, u32 id)
{
size_t pos = FW_PAYLOAD_OFFSET;
u32 chunk_id, chunk_size;
while (pos < fw->size) {
chunk_id = get_unaligned_le32(fw->data +
pos + FW_CHUNK_ID_OFFSET);
if (chunk_id == id)
return fw->data + pos;
chunk_size = get_unaligned_le32(fw->data +
pos + FW_CHUNK_SIZE_OFFSET);
pos += chunk_size + 2 * sizeof(u32); /* chunk ID + size */
}
return NULL;
}
static int wdt87xx_get_sysparam(struct i2c_client *client,
struct wdt87xx_sys_param *param)
{
u8 buf[PKT_READ_SIZE];
int error;
error = wdt87xx_get_desc(client, WDT_GD_DEVICE, buf, 18);
if (error) {
dev_err(&client->dev, "failed to get device desc\n");
return error;
}
param->vendor_id = get_unaligned_le16(buf + DEV_DESC_OFFSET_VID);
param->product_id = get_unaligned_le16(buf + DEV_DESC_OFFSET_PID);
error = wdt87xx_get_string(client, STRIDX_PARAMETERS, buf, 34);
if (error) {
dev_err(&client->dev, "failed to get parameters\n");
return error;
}
param->xmls_id1 = get_unaligned_le16(buf + CTL_PARAM_OFFSET_XMLS_ID1);
param->xmls_id2 = get_unaligned_le16(buf + CTL_PARAM_OFFSET_XMLS_ID2);
param->phy_ch_x = get_unaligned_le16(buf + CTL_PARAM_OFFSET_PHY_CH_X);
param->phy_ch_y = get_unaligned_le16(buf + CTL_PARAM_OFFSET_PHY_CH_Y);
param->phy_w = get_unaligned_le16(buf + CTL_PARAM_OFFSET_PHY_W) / 10;
param->phy_h = get_unaligned_le16(buf + CTL_PARAM_OFFSET_PHY_H) / 10;
/* Get the scaling factor of pixel to logical coordinate */
param->scaling_factor =
get_unaligned_le16(buf + CTL_PARAM_OFFSET_FACTOR);
param->max_x = MAX_UNIT_AXIS;
param->max_y = DIV_ROUND_CLOSEST(MAX_UNIT_AXIS * param->phy_h,
param->phy_w);
error = wdt87xx_get_string(client, STRIDX_PLATFORM_ID, buf, 8);
if (error) {
dev_err(&client->dev, "failed to get platform id\n");
return error;
}
param->plat_id = buf[1];
buf[0] = 0xf2;
error = wdt87xx_get_feature(client, buf, 16);
if (error) {
dev_err(&client->dev, "failed to get firmware id\n");
return error;
}
if (buf[0] != 0xf2) {
dev_err(&client->dev, "wrong id of fw response: 0x%x\n",
buf[0]);
return -EINVAL;
}
param->fw_id = get_unaligned_le16(&buf[1]);
dev_info(&client->dev,
"fw_id: 0x%x, plat_id: 0x%x, xml_id1: %04x, xml_id2: %04x\n",
param->fw_id, param->plat_id,
param->xmls_id1, param->xmls_id2);
return 0;
}
static int wdt87xx_validate_firmware(struct wdt87xx_data *wdt,
const struct firmware *fw)
{
const void *fw_chunk;
u32 data1, data2;
u32 size;
u8 fw_chip_id;
u8 chip_id;
data1 = get_unaligned_le32(fw->data + FW_FOURCC1_OFFSET);
data2 = get_unaligned_le32(fw->data + FW_FOURCC2_OFFSET);
if (data1 != FOURCC_ID_RIFF || data2 != FOURCC_ID_WHIF) {
dev_err(&wdt->client->dev, "check fw tag failed\n");
return -EINVAL;
}
size = get_unaligned_le32(fw->data + FW_SIZE_OFFSET);
if (size != fw->size) {
dev_err(&wdt->client->dev,
"fw size mismatch: expected %d, actual %zu\n",
size, fw->size);
return -EINVAL;
}
/*
* Get the chip_id from the firmware. Make sure that it is the
* right controller to do the firmware and config update.
*/
fw_chunk = wdt87xx_get_fw_chunk(fw, CHUNK_ID_FRWR);
if (!fw_chunk) {
dev_err(&wdt->client->dev,
"unable to locate firmware chunk\n");
return -EINVAL;
}
fw_chip_id = (get_unaligned_le32(fw_chunk +
FW_CHUNK_VERSION_OFFSET) >> 12) & 0xF;
chip_id = (wdt->param.fw_id >> 12) & 0xF;
if (fw_chip_id != chip_id) {
dev_err(&wdt->client->dev,
"fw version mismatch: fw %d vs. chip %d\n",
fw_chip_id, chip_id);
return -ENODEV;
}
return 0;
}
static int wdt87xx_validate_fw_chunk(const void *data, int id)
{
if (id == CHUNK_ID_FRWR) {
u32 fw_id;
fw_id = get_unaligned_le32(data + FW_CHUNK_PAYLOAD_OFFSET);
if (fw_id != WDT_FIRMWARE_ID)
return -EINVAL;
}
return 0;
}
static int wdt87xx_write_data(struct i2c_client *client, const char *data,
u32 address, int length)
{
u16 packet_size;
int count = 0;
int error;
u8 pkt_buf[PKT_BUF_SIZE];
/* Address and length should be 4 bytes aligned */
if ((address & 0x3) != 0 || (length & 0x3) != 0) {
dev_err(&client->dev,
"addr & len must be 4 bytes aligned %x, %x\n",
address, length);
return -EINVAL;
}
while (length) {
packet_size = min(length, PACKET_SIZE);
pkt_buf[CMD_REPORT_ID_OFFSET] = VND_REQ_WRITE;
pkt_buf[CMD_TYPE_OFFSET] = VND_SET_DATA;
put_unaligned_le16(packet_size, &pkt_buf[CMD_INDEX_OFFSET]);
put_unaligned_le32(address, &pkt_buf[CMD_LENGTH_OFFSET]);
memcpy(&pkt_buf[CMD_DATA_OFFSET], data, packet_size);
error = wdt87xx_set_feature(client, pkt_buf, sizeof(pkt_buf));
if (error)
return error;
length -= packet_size;
data += packet_size;
address += packet_size;
/* Wait for the controller to finish the write */
mdelay(WDT_FLASH_WRITE_DELAY_MS);
if ((++count % 32) == 0) {
/* Delay for fw to clear watch dog */
msleep(20);
}
}
return 0;
}
static u16 misr(u16 cur_value, u8 new_value)
{
u32 a, b;
u32 bit0;
u32 y;
a = cur_value;
b = new_value;
bit0 = a ^ (b & 1);
bit0 ^= a >> 1;
bit0 ^= a >> 2;
bit0 ^= a >> 4;
bit0 ^= a >> 5;
bit0 ^= a >> 7;
bit0 ^= a >> 11;
bit0 ^= a >> 15;
y = (a << 1) ^ b;
y = (y & ~1) | (bit0 & 1);
return (u16)y;
}
static u16 wdt87xx_calculate_checksum(const u8 *data, size_t length)
{
u16 checksum = 0;
size_t i;
for (i = 0; i < length; i++)
checksum = misr(checksum, data[i]);
return checksum;
}
static int wdt87xx_get_checksum(struct i2c_client *client, u16 *checksum,
u32 address, int length)
{
int error;
int time_delay;
u8 pkt_buf[PKT_BUF_SIZE];
u8 cmd_buf[CMD_BUF_SIZE];
error = wdt87xx_send_command(client, VND_SET_CHECKSUM_LENGTH, length);
if (error) {
dev_err(&client->dev, "failed to set checksum length\n");
return error;
}
error = wdt87xx_send_command(client, VND_SET_CHECKSUM_CALC, address);
if (error) {
dev_err(&client->dev, "failed to set checksum address\n");
return error;
}
/* Wait the operation to complete */
time_delay = DIV_ROUND_UP(length, 1024);
msleep(time_delay * 30);
memset(cmd_buf, 0, sizeof(cmd_buf));
cmd_buf[CMD_REPORT_ID_OFFSET] = VND_REQ_READ;
cmd_buf[CMD_TYPE_OFFSET] = VND_GET_CHECKSUM;
error = wdt87xx_set_feature(client, cmd_buf, sizeof(cmd_buf));
if (error) {
dev_err(&client->dev, "failed to request checksum\n");
return error;
}
memset(pkt_buf, 0, sizeof(pkt_buf));
pkt_buf[CMD_REPORT_ID_OFFSET] = VND_READ_DATA;
error = wdt87xx_get_feature(client, pkt_buf, sizeof(pkt_buf));
if (error) {
dev_err(&client->dev, "failed to read checksum\n");
return error;
}
*checksum = get_unaligned_le16(&pkt_buf[CMD_DATA_OFFSET]);
return 0;
}
static int wdt87xx_write_firmware(struct i2c_client *client, const void *chunk)
{
u32 start_addr = get_unaligned_le32(chunk + FW_CHUNK_TGT_START_OFFSET);
u32 size = get_unaligned_le32(chunk + FW_CHUNK_PAYLOAD_LEN_OFFSET);
const void *data = chunk + FW_CHUNK_PAYLOAD_OFFSET;
int error;
int err1;
int page_size;
int retry = 0;
u16 device_checksum, firmware_checksum;
dev_dbg(&client->dev, "start 4k page program\n");
error = wdt87xx_send_command(client, VND_CMD_STOP, MODE_STOP);
if (error) {
dev_err(&client->dev, "stop report mode failed\n");
return error;
}
error = wdt87xx_send_command(client, VND_CMD_SFUNL, 0);
if (error) {
dev_err(&client->dev, "unlock failed\n");
goto out_enable_reporting;
}
mdelay(10);
while (size) {
dev_dbg(&client->dev, "%s: %x, %x\n", __func__,
start_addr, size);
page_size = min_t(u32, size, PG_SIZE);
size -= page_size;
for (retry = 0; retry < MAX_RETRIES; retry++) {
error = wdt87xx_send_command(client, VND_CMD_ERASE,
start_addr);
if (error) {
dev_err(&client->dev,
"erase failed at %#08x\n", start_addr);
break;
}
msleep(WDT_FLASH_ERASE_DELAY_MS);
error = wdt87xx_write_data(client, data, start_addr,
page_size);
if (error) {
dev_err(&client->dev,
"write failed at %#08x (%d bytes)\n",
start_addr, page_size);
break;
}
error = wdt87xx_get_checksum(client, &device_checksum,
start_addr, page_size);
if (error) {
dev_err(&client->dev,
"failed to retrieve checksum for %#08x (len: %d)\n",
start_addr, page_size);
break;
}
firmware_checksum =
wdt87xx_calculate_checksum(data, page_size);
if (device_checksum == firmware_checksum)
break;
dev_err(&client->dev,
"checksum fail: %d vs %d, retry %d\n",
device_checksum, firmware_checksum, retry);
}
if (retry == MAX_RETRIES) {
dev_err(&client->dev, "page write failed\n");
error = -EIO;
goto out_lock_device;
}
start_addr = start_addr + page_size;
data = data + page_size;
}
out_lock_device:
err1 = wdt87xx_send_command(client, VND_CMD_SFLCK, 0);
if (err1)
dev_err(&client->dev, "lock failed\n");
mdelay(10);
out_enable_reporting:
err1 = wdt87xx_send_command(client, VND_CMD_START, 0);
if (err1)
dev_err(&client->dev, "start to report failed\n");
return error ? error : err1;
}
static int wdt87xx_load_chunk(struct i2c_client *client,
const struct firmware *fw, u32 ck_id)
{
const void *chunk;
int error;
chunk = wdt87xx_get_fw_chunk(fw, ck_id);
if (!chunk) {
dev_err(&client->dev, "unable to locate chunk (type %d)\n",
ck_id);
return -EINVAL;
}
error = wdt87xx_validate_fw_chunk(chunk, ck_id);
if (error) {
dev_err(&client->dev, "invalid chunk (type %d): %d\n",
ck_id, error);
return error;
}
error = wdt87xx_write_firmware(client, chunk);
if (error) {
dev_err(&client->dev,
"failed to write fw chunk (type %d): %d\n",
ck_id, error);
return error;
}
return 0;
}
static int wdt87xx_do_update_firmware(struct i2c_client *client,
const struct firmware *fw,
unsigned int chunk_id)
{
struct wdt87xx_data *wdt = i2c_get_clientdata(client);
int error;
error = wdt87xx_validate_firmware(wdt, fw);
if (error)
return error;
error = mutex_lock_interruptible(&wdt->fw_mutex);
if (error)
return error;
disable_irq(client->irq);
error = wdt87xx_load_chunk(client, fw, chunk_id);
if (error) {
dev_err(&client->dev,
"firmware load failed (type: %d): %d\n",
chunk_id, error);
goto out;
}
error = wdt87xx_sw_reset(client);
if (error) {
dev_err(&client->dev, "soft reset failed: %d\n", error);
goto out;
}
/* Refresh the parameters */
error = wdt87xx_get_sysparam(client, &wdt->param);
if (error)
dev_err(&client->dev,
"failed to refresh system parameters: %d\n", error);
out:
enable_irq(client->irq);
mutex_unlock(&wdt->fw_mutex);
return error ? error : 0;
}
static int wdt87xx_update_firmware(struct device *dev,
const char *fw_name, unsigned int chunk_id)
{
struct i2c_client *client = to_i2c_client(dev);
const struct firmware *fw;
int error;
error = request_firmware(&fw, fw_name, dev);
if (error) {
dev_err(&client->dev, "unable to retrieve firmware %s: %d\n",
fw_name, error);
return error;
}
error = wdt87xx_do_update_firmware(client, fw, chunk_id);
release_firmware(fw);
return error ? error : 0;
}
static ssize_t config_csum_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct wdt87xx_data *wdt = i2c_get_clientdata(client);
u32 cfg_csum;
cfg_csum = wdt->param.xmls_id1;
cfg_csum = (cfg_csum << 16) | wdt->param.xmls_id2;
return scnprintf(buf, PAGE_SIZE, "%x\n", cfg_csum);
}
static ssize_t fw_version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct wdt87xx_data *wdt = i2c_get_clientdata(client);
return scnprintf(buf, PAGE_SIZE, "%x\n", wdt->param.fw_id);
}
static ssize_t plat_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct wdt87xx_data *wdt = i2c_get_clientdata(client);
return scnprintf(buf, PAGE_SIZE, "%x\n", wdt->param.plat_id);
}
static ssize_t update_config_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int error;
error = wdt87xx_update_firmware(dev, WDT87XX_CFG_NAME, CHUNK_ID_CNFG);
return error ? error : count;
}
static ssize_t update_fw_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int error;
error = wdt87xx_update_firmware(dev, WDT87XX_FW_NAME, CHUNK_ID_FRWR);
return error ? error : count;
}
static DEVICE_ATTR_RO(config_csum);
static DEVICE_ATTR_RO(fw_version);
static DEVICE_ATTR_RO(plat_id);
static DEVICE_ATTR_WO(update_config);
static DEVICE_ATTR_WO(update_fw);
static struct attribute *wdt87xx_attrs[] = {
&dev_attr_config_csum.attr,
&dev_attr_fw_version.attr,
&dev_attr_plat_id.attr,
&dev_attr_update_config.attr,
&dev_attr_update_fw.attr,
NULL
};
static const struct attribute_group wdt87xx_attr_group = {
.attrs = wdt87xx_attrs,
};
static void wdt87xx_report_contact(struct input_dev *input,
struct wdt87xx_sys_param *param,
u8 *buf)
{
int finger_id;
u32 x, y, w;
u8 p;
finger_id = (buf[FINGER_EV_V1_OFFSET_ID] >> 3) - 1;
if (finger_id < 0)
return;
/* Check if this is an active contact */
if (!(buf[FINGER_EV_V1_OFFSET_ID] & 0x1))
return;
w = buf[FINGER_EV_V1_OFFSET_W];
w *= param->scaling_factor;
p = buf[FINGER_EV_V1_OFFSET_P];
x = get_unaligned_le16(buf + FINGER_EV_V1_OFFSET_X);
y = get_unaligned_le16(buf + FINGER_EV_V1_OFFSET_Y);
y = DIV_ROUND_CLOSEST(y * param->phy_h, param->phy_w);
/* Refuse incorrect coordinates */
if (x > param->max_x || y > param->max_y)
return;
dev_dbg(input->dev.parent, "tip on (%d), x(%d), y(%d)\n",
finger_id, x, y);
input_mt_slot(input, finger_id);
input_mt_report_slot_state(input, MT_TOOL_FINGER, 1);
input_report_abs(input, ABS_MT_TOUCH_MAJOR, w);
input_report_abs(input, ABS_MT_PRESSURE, p);
input_report_abs(input, ABS_MT_POSITION_X, x);
input_report_abs(input, ABS_MT_POSITION_Y, y);
}
static irqreturn_t wdt87xx_ts_interrupt(int irq, void *dev_id)
{
struct wdt87xx_data *wdt = dev_id;
struct i2c_client *client = wdt->client;
int i, fingers;
int error;
u8 raw_buf[WDT_V1_RAW_BUF_COUNT] = {0};
error = i2c_master_recv(client, raw_buf, WDT_V1_RAW_BUF_COUNT);
if (error < 0) {
dev_err(&client->dev, "read v1 raw data failed: %d\n", error);
goto irq_exit;
}
fingers = raw_buf[TOUCH_PK_V1_OFFSET_FNGR_NUM];
if (!fingers)
goto irq_exit;
for (i = 0; i < WDT_MAX_FINGER; i++)
wdt87xx_report_contact(wdt->input,
&wdt->param,
&raw_buf[TOUCH_PK_V1_OFFSET_EVENT +
i * FINGER_EV_V1_SIZE]);
input_mt_sync_frame(wdt->input);
input_sync(wdt->input);
irq_exit:
return IRQ_HANDLED;
}
static int wdt87xx_ts_create_input_device(struct wdt87xx_data *wdt)
{
struct device *dev = &wdt->client->dev;
struct input_dev *input;
unsigned int res = DIV_ROUND_CLOSEST(MAX_UNIT_AXIS, wdt->param.phy_w);
int error;
input = devm_input_allocate_device(dev);
if (!input) {
dev_err(dev, "failed to allocate input device\n");
return -ENOMEM;
}
wdt->input = input;
input->name = "WDT87xx Touchscreen";
input->id.bustype = BUS_I2C;
input->id.vendor = wdt->param.vendor_id;
input->id.product = wdt->param.product_id;
input->phys = wdt->phys;
input_set_abs_params(input, ABS_MT_POSITION_X, 0,
wdt->param.max_x, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
wdt->param.max_y, 0, 0);
input_abs_set_res(input, ABS_MT_POSITION_X, res);
input_abs_set_res(input, ABS_MT_POSITION_Y, res);
input_set_abs_params(input, ABS_MT_TOUCH_MAJOR,
0, wdt->param.max_x, 0, 0);
input_set_abs_params(input, ABS_MT_PRESSURE, 0, 0xFF, 0, 0);
input_mt_init_slots(input, WDT_MAX_FINGER,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
error = input_register_device(input);
if (error) {
dev_err(dev, "failed to register input device: %d\n", error);
return error;
}
return 0;
}
static int wdt87xx_ts_probe(struct i2c_client *client)
{
struct wdt87xx_data *wdt;
int error;
dev_dbg(&client->dev, "adapter=%d, client irq: %d\n",
client->adapter->nr, client->irq);
/* Check if the I2C function is ok in this adaptor */
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
return -ENXIO;
wdt = devm_kzalloc(&client->dev, sizeof(*wdt), GFP_KERNEL);
if (!wdt)
return -ENOMEM;
wdt->client = client;
mutex_init(&wdt->fw_mutex);
i2c_set_clientdata(client, wdt);
snprintf(wdt->phys, sizeof(wdt->phys), "i2c-%u-%04x/input0",
client->adapter->nr, client->addr);
error = wdt87xx_get_sysparam(client, &wdt->param);
if (error)
return error;
error = wdt87xx_ts_create_input_device(wdt);
if (error)
return error;
error = devm_request_threaded_irq(&client->dev, client->irq,
NULL, wdt87xx_ts_interrupt,
IRQF_ONESHOT,
client->name, wdt);
if (error) {
dev_err(&client->dev, "request irq failed: %d\n", error);
return error;
}
error = devm_device_add_group(&client->dev, &wdt87xx_attr_group);
if (error) {
dev_err(&client->dev, "create sysfs failed: %d\n", error);
return error;
}
return 0;
}
static int wdt87xx_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
int error;
disable_irq(client->irq);
error = wdt87xx_send_command(client, VND_CMD_STOP, MODE_IDLE);
if (error) {
enable_irq(client->irq);
dev_err(&client->dev,
"failed to stop device when suspending: %d\n",
error);
return error;
}
return 0;
}
static int wdt87xx_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
int error;
/*
* The chip may have been reset while system is resuming,
* give it some time to settle.
*/
msleep(100);
error = wdt87xx_send_command(client, VND_CMD_START, 0);
if (error)
dev_err(&client->dev,
"failed to start device when resuming: %d\n",
error);
enable_irq(client->irq);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(wdt87xx_pm_ops, wdt87xx_suspend, wdt87xx_resume);
static const struct i2c_device_id wdt87xx_dev_id[] = {
{ WDT87XX_NAME, 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wdt87xx_dev_id);
static const struct acpi_device_id wdt87xx_acpi_id[] = {
{ "WDHT0001", 0 },
{ }
};
MODULE_DEVICE_TABLE(acpi, wdt87xx_acpi_id);
static struct i2c_driver wdt87xx_driver = {
.probe = wdt87xx_ts_probe,
.id_table = wdt87xx_dev_id,
.driver = {
.name = WDT87XX_NAME,
.pm = pm_sleep_ptr(&wdt87xx_pm_ops),
.acpi_match_table = ACPI_PTR(wdt87xx_acpi_id),
},
};
module_i2c_driver(wdt87xx_driver);
MODULE_AUTHOR("HN Chen <[email protected]>");
MODULE_DESCRIPTION("WeidaHiTech WDT87XX Touchscreen driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/wdt87xx_i2c.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for ChipOne icn8318 i2c touchscreen controller
*
* Copyright (c) 2015 Red Hat Inc.
*
* Red Hat authors:
* Hans de Goede <[email protected]>
*/
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/module.h>
#include <linux/of.h>
#define ICN8318_REG_POWER 4
#define ICN8318_REG_TOUCHDATA 16
#define ICN8318_POWER_ACTIVE 0
#define ICN8318_POWER_MONITOR 1
#define ICN8318_POWER_HIBERNATE 2
#define ICN8318_MAX_TOUCHES 5
struct icn8318_touch {
__u8 slot;
__be16 x;
__be16 y;
__u8 pressure; /* Seems more like finger width then pressure really */
__u8 event;
/* The difference between 2 and 3 is unclear */
#define ICN8318_EVENT_NO_DATA 1 /* No finger seen yet since wakeup */
#define ICN8318_EVENT_UPDATE1 2 /* New or updated coordinates */
#define ICN8318_EVENT_UPDATE2 3 /* New or updated coordinates */
#define ICN8318_EVENT_END 4 /* Finger lifted */
} __packed;
struct icn8318_touch_data {
__u8 softbutton;
__u8 touch_count;
struct icn8318_touch touches[ICN8318_MAX_TOUCHES];
} __packed;
struct icn8318_data {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *wake_gpio;
struct touchscreen_properties prop;
};
static int icn8318_read_touch_data(struct i2c_client *client,
struct icn8318_touch_data *touch_data)
{
u8 reg = ICN8318_REG_TOUCHDATA;
struct i2c_msg msg[2] = {
{
.addr = client->addr,
.len = 1,
.buf = ®
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = sizeof(struct icn8318_touch_data),
.buf = (u8 *)touch_data
}
};
return i2c_transfer(client->adapter, msg, 2);
}
static inline bool icn8318_touch_active(u8 event)
{
return (event == ICN8318_EVENT_UPDATE1) ||
(event == ICN8318_EVENT_UPDATE2);
}
static irqreturn_t icn8318_irq(int irq, void *dev_id)
{
struct icn8318_data *data = dev_id;
struct device *dev = &data->client->dev;
struct icn8318_touch_data touch_data;
int i, ret;
ret = icn8318_read_touch_data(data->client, &touch_data);
if (ret < 0) {
dev_err(dev, "Error reading touch data: %d\n", ret);
return IRQ_HANDLED;
}
if (touch_data.softbutton) {
/*
* Other data is invalid when a softbutton is pressed.
* This needs some extra devicetree bindings to map the icn8318
* softbutton codes to evdev codes. Currently no known devices
* use this.
*/
return IRQ_HANDLED;
}
if (touch_data.touch_count > ICN8318_MAX_TOUCHES) {
dev_warn(dev, "Too much touches %d > %d\n",
touch_data.touch_count, ICN8318_MAX_TOUCHES);
touch_data.touch_count = ICN8318_MAX_TOUCHES;
}
for (i = 0; i < touch_data.touch_count; i++) {
struct icn8318_touch *touch = &touch_data.touches[i];
bool act = icn8318_touch_active(touch->event);
input_mt_slot(data->input, touch->slot);
input_mt_report_slot_state(data->input, MT_TOOL_FINGER, act);
if (!act)
continue;
touchscreen_report_pos(data->input, &data->prop,
be16_to_cpu(touch->x),
be16_to_cpu(touch->y), true);
}
input_mt_sync_frame(data->input);
input_sync(data->input);
return IRQ_HANDLED;
}
static int icn8318_start(struct input_dev *dev)
{
struct icn8318_data *data = input_get_drvdata(dev);
enable_irq(data->client->irq);
gpiod_set_value_cansleep(data->wake_gpio, 1);
return 0;
}
static void icn8318_stop(struct input_dev *dev)
{
struct icn8318_data *data = input_get_drvdata(dev);
disable_irq(data->client->irq);
i2c_smbus_write_byte_data(data->client, ICN8318_REG_POWER,
ICN8318_POWER_HIBERNATE);
gpiod_set_value_cansleep(data->wake_gpio, 0);
}
static int icn8318_suspend(struct device *dev)
{
struct icn8318_data *data = i2c_get_clientdata(to_i2c_client(dev));
mutex_lock(&data->input->mutex);
if (input_device_enabled(data->input))
icn8318_stop(data->input);
mutex_unlock(&data->input->mutex);
return 0;
}
static int icn8318_resume(struct device *dev)
{
struct icn8318_data *data = i2c_get_clientdata(to_i2c_client(dev));
mutex_lock(&data->input->mutex);
if (input_device_enabled(data->input))
icn8318_start(data->input);
mutex_unlock(&data->input->mutex);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(icn8318_pm_ops, icn8318_suspend, icn8318_resume);
static int icn8318_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct icn8318_data *data;
struct input_dev *input;
int error;
if (!client->irq) {
dev_err(dev, "Error no irq specified\n");
return -EINVAL;
}
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->wake_gpio = devm_gpiod_get(dev, "wake", GPIOD_OUT_LOW);
if (IS_ERR(data->wake_gpio))
return dev_err_probe(dev, PTR_ERR(data->wake_gpio), "Error getting wake gpio\n");
input = devm_input_allocate_device(dev);
if (!input)
return -ENOMEM;
input->name = client->name;
input->id.bustype = BUS_I2C;
input->open = icn8318_start;
input->close = icn8318_stop;
input->dev.parent = dev;
input_set_capability(input, EV_ABS, ABS_MT_POSITION_X);
input_set_capability(input, EV_ABS, ABS_MT_POSITION_Y);
touchscreen_parse_properties(input, true, &data->prop);
if (!input_abs_get_max(input, ABS_MT_POSITION_X) ||
!input_abs_get_max(input, ABS_MT_POSITION_Y)) {
dev_err(dev, "Error touchscreen-size-x and/or -y missing\n");
return -EINVAL;
}
error = input_mt_init_slots(input, ICN8318_MAX_TOUCHES,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
if (error)
return error;
data->client = client;
data->input = input;
input_set_drvdata(input, data);
error = devm_request_threaded_irq(dev, client->irq, NULL, icn8318_irq,
IRQF_ONESHOT, client->name, data);
if (error) {
dev_err(dev, "Error requesting irq: %d\n", error);
return error;
}
/* Stop device till opened */
icn8318_stop(data->input);
error = input_register_device(input);
if (error)
return error;
i2c_set_clientdata(client, data);
return 0;
}
static const struct of_device_id icn8318_of_match[] = {
{ .compatible = "chipone,icn8318" },
{ }
};
MODULE_DEVICE_TABLE(of, icn8318_of_match);
/* This is useless for OF-enabled devices, but it is needed by I2C subsystem */
static const struct i2c_device_id icn8318_i2c_id[] = {
{ },
};
MODULE_DEVICE_TABLE(i2c, icn8318_i2c_id);
static struct i2c_driver icn8318_driver = {
.driver = {
.name = "chipone_icn8318",
.pm = pm_sleep_ptr(&icn8318_pm_ops),
.of_match_table = icn8318_of_match,
},
.probe = icn8318_probe,
.id_table = icn8318_i2c_id,
};
module_i2c_driver(icn8318_driver);
MODULE_DESCRIPTION("ChipOne icn8318 I2C Touchscreen Driver");
MODULE_AUTHOR("Hans de Goede <[email protected]>");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/chipone_icn8318.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for I2C connected EETI EXC3000 multiple touch controller
*
* Copyright (C) 2017 Ahmet Inan <[email protected]>
*
* minimal implementation based on egalax_ts.c and egalax_i2c.c
*/
#include <linux/acpi.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <linux/sizes.h>
#include <linux/timer.h>
#include <asm/unaligned.h>
#define EXC3000_NUM_SLOTS 10
#define EXC3000_SLOTS_PER_FRAME 5
#define EXC3000_LEN_FRAME 66
#define EXC3000_LEN_VENDOR_REQUEST 68
#define EXC3000_LEN_POINT 10
#define EXC3000_LEN_MODEL_NAME 16
#define EXC3000_LEN_FW_VERSION 16
#define EXC3000_VENDOR_EVENT 0x03
#define EXC3000_MT1_EVENT 0x06
#define EXC3000_MT2_EVENT 0x18
#define EXC3000_TIMEOUT_MS 100
#define EXC3000_RESET_MS 10
#define EXC3000_READY_MS 100
static const struct i2c_device_id exc3000_id[];
struct eeti_dev_info {
const char *name;
int max_xy;
};
enum eeti_dev_id {
EETI_EXC3000,
EETI_EXC80H60,
EETI_EXC80H84,
};
static struct eeti_dev_info exc3000_info[] = {
[EETI_EXC3000] = {
.name = "EETI EXC3000 Touch Screen",
.max_xy = SZ_4K - 1,
},
[EETI_EXC80H60] = {
.name = "EETI EXC80H60 Touch Screen",
.max_xy = SZ_16K - 1,
},
[EETI_EXC80H84] = {
.name = "EETI EXC80H84 Touch Screen",
.max_xy = SZ_16K - 1,
},
};
struct exc3000_data {
struct i2c_client *client;
const struct eeti_dev_info *info;
struct input_dev *input;
struct touchscreen_properties prop;
struct gpio_desc *reset;
struct timer_list timer;
u8 buf[2 * EXC3000_LEN_FRAME];
struct completion wait_event;
struct mutex query_lock;
};
static void exc3000_report_slots(struct input_dev *input,
struct touchscreen_properties *prop,
const u8 *buf, int num)
{
for (; num--; buf += EXC3000_LEN_POINT) {
if (buf[0] & BIT(0)) {
input_mt_slot(input, buf[1]);
input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
touchscreen_report_pos(input, prop,
get_unaligned_le16(buf + 2),
get_unaligned_le16(buf + 4),
true);
}
}
}
static void exc3000_timer(struct timer_list *t)
{
struct exc3000_data *data = from_timer(data, t, timer);
input_mt_sync_frame(data->input);
input_sync(data->input);
}
static inline void exc3000_schedule_timer(struct exc3000_data *data)
{
mod_timer(&data->timer, jiffies + msecs_to_jiffies(EXC3000_TIMEOUT_MS));
}
static void exc3000_shutdown_timer(void *timer)
{
timer_shutdown_sync(timer);
}
static int exc3000_read_frame(struct exc3000_data *data, u8 *buf)
{
struct i2c_client *client = data->client;
int ret;
ret = i2c_master_send(client, "'", 2);
if (ret < 0)
return ret;
if (ret != 2)
return -EIO;
ret = i2c_master_recv(client, buf, EXC3000_LEN_FRAME);
if (ret < 0)
return ret;
if (ret != EXC3000_LEN_FRAME)
return -EIO;
if (get_unaligned_le16(buf) != EXC3000_LEN_FRAME)
return -EINVAL;
return 0;
}
static int exc3000_handle_mt_event(struct exc3000_data *data)
{
struct input_dev *input = data->input;
int ret, total_slots;
u8 *buf = data->buf;
total_slots = buf[3];
if (!total_slots || total_slots > EXC3000_NUM_SLOTS) {
ret = -EINVAL;
goto out_fail;
}
if (total_slots > EXC3000_SLOTS_PER_FRAME) {
/* Read 2nd frame to get the rest of the contacts. */
ret = exc3000_read_frame(data, buf + EXC3000_LEN_FRAME);
if (ret)
goto out_fail;
/* 2nd chunk must have number of contacts set to 0. */
if (buf[EXC3000_LEN_FRAME + 3] != 0) {
ret = -EINVAL;
goto out_fail;
}
}
/*
* We read full state successfully, no contacts will be "stuck".
*/
del_timer_sync(&data->timer);
while (total_slots > 0) {
int slots = min(total_slots, EXC3000_SLOTS_PER_FRAME);
exc3000_report_slots(input, &data->prop, buf + 4, slots);
total_slots -= slots;
buf += EXC3000_LEN_FRAME;
}
input_mt_sync_frame(input);
input_sync(input);
return 0;
out_fail:
/* Schedule a timer to release "stuck" contacts */
exc3000_schedule_timer(data);
return ret;
}
static irqreturn_t exc3000_interrupt(int irq, void *dev_id)
{
struct exc3000_data *data = dev_id;
u8 *buf = data->buf;
int ret;
ret = exc3000_read_frame(data, buf);
if (ret) {
/* Schedule a timer to release "stuck" contacts */
exc3000_schedule_timer(data);
goto out;
}
switch (buf[2]) {
case EXC3000_VENDOR_EVENT:
complete(&data->wait_event);
break;
case EXC3000_MT1_EVENT:
case EXC3000_MT2_EVENT:
exc3000_handle_mt_event(data);
break;
default:
break;
}
out:
return IRQ_HANDLED;
}
static int exc3000_vendor_data_request(struct exc3000_data *data, u8 *request,
u8 request_len, u8 *response, int timeout)
{
u8 buf[EXC3000_LEN_VENDOR_REQUEST] = { 0x67, 0x00, 0x42, 0x00, 0x03 };
int ret;
unsigned long time_left;
mutex_lock(&data->query_lock);
reinit_completion(&data->wait_event);
buf[5] = request_len;
memcpy(&buf[6], request, request_len);
ret = i2c_master_send(data->client, buf, EXC3000_LEN_VENDOR_REQUEST);
if (ret < 0)
goto out_unlock;
if (response) {
time_left = wait_for_completion_timeout(&data->wait_event,
timeout * HZ);
if (time_left == 0) {
ret = -ETIMEDOUT;
goto out_unlock;
}
if (data->buf[3] >= EXC3000_LEN_FRAME) {
ret = -ENOSPC;
goto out_unlock;
}
memcpy(response, &data->buf[4], data->buf[3]);
ret = data->buf[3];
}
out_unlock:
mutex_unlock(&data->query_lock);
return ret;
}
static ssize_t fw_version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct exc3000_data *data = i2c_get_clientdata(client);
u8 response[EXC3000_LEN_FRAME];
int ret;
/* query bootloader info */
ret = exc3000_vendor_data_request(data,
(u8[]){0x39, 0x02}, 2, response, 1);
if (ret < 0)
return ret;
/*
* If the bootloader version is non-zero then the device is in
* bootloader mode and won't answer a query for the application FW
* version, so we just use the bootloader version info.
*/
if (response[2] || response[3])
return sprintf(buf, "%d.%d\n", response[2], response[3]);
ret = exc3000_vendor_data_request(data, (u8[]){'D'}, 1, response, 1);
if (ret < 0)
return ret;
return sprintf(buf, "%s\n", &response[1]);
}
static DEVICE_ATTR_RO(fw_version);
static ssize_t model_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct exc3000_data *data = i2c_get_clientdata(client);
u8 response[EXC3000_LEN_FRAME];
int ret;
ret = exc3000_vendor_data_request(data, (u8[]){'E'}, 1, response, 1);
if (ret < 0)
return ret;
return sprintf(buf, "%s\n", &response[1]);
}
static DEVICE_ATTR_RO(model);
static ssize_t type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct exc3000_data *data = i2c_get_clientdata(client);
u8 response[EXC3000_LEN_FRAME];
int ret;
ret = exc3000_vendor_data_request(data, (u8[]){'F'}, 1, response, 1);
if (ret < 0)
return ret;
return sprintf(buf, "%s\n", &response[1]);
}
static DEVICE_ATTR_RO(type);
static struct attribute *sysfs_attrs[] = {
&dev_attr_fw_version.attr,
&dev_attr_model.attr,
&dev_attr_type.attr,
NULL
};
static struct attribute_group exc3000_attribute_group = {
.attrs = sysfs_attrs
};
static int exc3000_probe(struct i2c_client *client)
{
struct exc3000_data *data;
struct input_dev *input;
int error, max_xy, retry;
data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->client = client;
data->info = device_get_match_data(&client->dev);
if (!data->info) {
enum eeti_dev_id eeti_dev_id =
i2c_match_id(exc3000_id, client)->driver_data;
data->info = &exc3000_info[eeti_dev_id];
}
timer_setup(&data->timer, exc3000_timer, 0);
init_completion(&data->wait_event);
mutex_init(&data->query_lock);
data->reset = devm_gpiod_get_optional(&client->dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(data->reset))
return PTR_ERR(data->reset);
/* For proper reset sequence, enable power while reset asserted */
error = devm_regulator_get_enable(&client->dev, "vdd");
if (error && error != -ENODEV)
return dev_err_probe(&client->dev, error,
"failed to request vdd regulator\n");
if (data->reset) {
msleep(EXC3000_RESET_MS);
gpiod_set_value_cansleep(data->reset, 0);
msleep(EXC3000_READY_MS);
}
input = devm_input_allocate_device(&client->dev);
if (!input)
return -ENOMEM;
data->input = input;
input_set_drvdata(input, data);
input->name = data->info->name;
input->id.bustype = BUS_I2C;
max_xy = data->info->max_xy;
input_set_abs_params(input, ABS_MT_POSITION_X, 0, max_xy, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0, max_xy, 0, 0);
touchscreen_parse_properties(input, true, &data->prop);
error = input_mt_init_slots(input, EXC3000_NUM_SLOTS,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
if (error)
return error;
error = input_register_device(input);
if (error)
return error;
error = devm_add_action_or_reset(&client->dev, exc3000_shutdown_timer,
&data->timer);
if (error)
return error;
error = devm_request_threaded_irq(&client->dev, client->irq,
NULL, exc3000_interrupt, IRQF_ONESHOT,
client->name, data);
if (error)
return error;
/*
* I²C does not have built-in recovery, so retry on failure. This
* ensures, that the device probe will not fail for temporary issues
* on the bus. This is not needed for the sysfs calls (userspace
* will receive the error code and can start another query) and
* cannot be done for touch events (but that only means loosing one
* or two touch events anyways).
*/
for (retry = 0; retry < 3; retry++) {
u8 response[EXC3000_LEN_FRAME];
error = exc3000_vendor_data_request(data, (u8[]){'E'}, 1,
response, 1);
if (error > 0) {
dev_dbg(&client->dev, "TS Model: %s", &response[1]);
error = 0;
break;
}
dev_warn(&client->dev, "Retry %d get EETI EXC3000 model: %d\n",
retry + 1, error);
}
if (error)
return error;
i2c_set_clientdata(client, data);
error = devm_device_add_group(&client->dev, &exc3000_attribute_group);
if (error)
return error;
return 0;
}
static const struct i2c_device_id exc3000_id[] = {
{ "exc3000", EETI_EXC3000 },
{ "exc80h60", EETI_EXC80H60 },
{ "exc80h84", EETI_EXC80H84 },
{ }
};
MODULE_DEVICE_TABLE(i2c, exc3000_id);
#ifdef CONFIG_OF
static const struct of_device_id exc3000_of_match[] = {
{ .compatible = "eeti,exc3000", .data = &exc3000_info[EETI_EXC3000] },
{ .compatible = "eeti,exc80h60", .data = &exc3000_info[EETI_EXC80H60] },
{ .compatible = "eeti,exc80h84", .data = &exc3000_info[EETI_EXC80H84] },
{ }
};
MODULE_DEVICE_TABLE(of, exc3000_of_match);
#endif
#ifdef CONFIG_ACPI
static const struct acpi_device_id exc3000_acpi_match[] = {
{ "EGA00001", .driver_data = (kernel_ulong_t)&exc3000_info[EETI_EXC80H60] },
{ }
};
MODULE_DEVICE_TABLE(acpi, exc3000_acpi_match);
#endif
static struct i2c_driver exc3000_driver = {
.driver = {
.name = "exc3000",
.of_match_table = of_match_ptr(exc3000_of_match),
.acpi_match_table = ACPI_PTR(exc3000_acpi_match),
},
.id_table = exc3000_id,
.probe = exc3000_probe,
};
module_i2c_driver(exc3000_driver);
MODULE_AUTHOR("Ahmet Inan <[email protected]>");
MODULE_DESCRIPTION("I2C connected EETI EXC3000 multiple touch controller driver");
MODULE_LICENSE("GPL v2");
|
linux-master
|
drivers/input/touchscreen/exc3000.c
|
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/input.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <asm/io.h>
#include <asm/delay.h>
#include <asm/adc.h>
#include <mach/hp6xx.h>
#define MODNAME "hp680_ts_input"
#define HP680_TS_ABS_X_MIN 40
#define HP680_TS_ABS_X_MAX 950
#define HP680_TS_ABS_Y_MIN 80
#define HP680_TS_ABS_Y_MAX 910
#define PHDR 0xa400012e
#define SCPDR 0xa4000136
static void do_softint(struct work_struct *work);
static struct input_dev *hp680_ts_dev;
static DECLARE_DELAYED_WORK(work, do_softint);
static void do_softint(struct work_struct *work)
{
int absx = 0, absy = 0;
u8 scpdr;
int touched = 0;
if (__raw_readb(PHDR) & PHDR_TS_PEN_DOWN) {
scpdr = __raw_readb(SCPDR);
scpdr |= SCPDR_TS_SCAN_ENABLE;
scpdr &= ~SCPDR_TS_SCAN_Y;
__raw_writeb(scpdr, SCPDR);
udelay(30);
absy = adc_single(ADC_CHANNEL_TS_Y);
scpdr = __raw_readb(SCPDR);
scpdr |= SCPDR_TS_SCAN_Y;
scpdr &= ~SCPDR_TS_SCAN_X;
__raw_writeb(scpdr, SCPDR);
udelay(30);
absx = adc_single(ADC_CHANNEL_TS_X);
scpdr = __raw_readb(SCPDR);
scpdr |= SCPDR_TS_SCAN_X;
scpdr &= ~SCPDR_TS_SCAN_ENABLE;
__raw_writeb(scpdr, SCPDR);
udelay(100);
touched = __raw_readb(PHDR) & PHDR_TS_PEN_DOWN;
}
if (touched) {
input_report_key(hp680_ts_dev, BTN_TOUCH, 1);
input_report_abs(hp680_ts_dev, ABS_X, absx);
input_report_abs(hp680_ts_dev, ABS_Y, absy);
} else {
input_report_key(hp680_ts_dev, BTN_TOUCH, 0);
}
input_sync(hp680_ts_dev);
enable_irq(HP680_TS_IRQ);
}
static irqreturn_t hp680_ts_interrupt(int irq, void *dev)
{
disable_irq_nosync(irq);
schedule_delayed_work(&work, HZ / 20);
return IRQ_HANDLED;
}
static int __init hp680_ts_init(void)
{
int err;
hp680_ts_dev = input_allocate_device();
if (!hp680_ts_dev)
return -ENOMEM;
hp680_ts_dev->evbit[0] = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY);
hp680_ts_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_abs_params(hp680_ts_dev, ABS_X,
HP680_TS_ABS_X_MIN, HP680_TS_ABS_X_MAX, 0, 0);
input_set_abs_params(hp680_ts_dev, ABS_Y,
HP680_TS_ABS_Y_MIN, HP680_TS_ABS_Y_MAX, 0, 0);
hp680_ts_dev->name = "HP Jornada touchscreen";
hp680_ts_dev->phys = "hp680_ts/input0";
if (request_irq(HP680_TS_IRQ, hp680_ts_interrupt,
0, MODNAME, NULL) < 0) {
printk(KERN_ERR "hp680_touchscreen.c: Can't allocate irq %d\n",
HP680_TS_IRQ);
err = -EBUSY;
goto fail1;
}
err = input_register_device(hp680_ts_dev);
if (err)
goto fail2;
return 0;
fail2: free_irq(HP680_TS_IRQ, NULL);
cancel_delayed_work_sync(&work);
fail1: input_free_device(hp680_ts_dev);
return err;
}
static void __exit hp680_ts_exit(void)
{
free_irq(HP680_TS_IRQ, NULL);
cancel_delayed_work_sync(&work);
input_unregister_device(hp680_ts_dev);
}
module_init(hp680_ts_init);
module_exit(hp680_ts_exit);
MODULE_AUTHOR("Andriy Skulysh, [email protected]");
MODULE_DESCRIPTION("HP Jornada 680 touchscreen driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/hp680_ts_input.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* TSI driver for Dialog DA9052
*
* Copyright(c) 2012 Dialog Semiconductor Ltd.
*
* Author: David Dajun Chen <[email protected]>
*/
#include <linux/module.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/mfd/da9052/reg.h>
#include <linux/mfd/da9052/da9052.h>
#define TSI_PEN_DOWN_STATUS 0x40
struct da9052_tsi {
struct da9052 *da9052;
struct input_dev *dev;
struct delayed_work ts_pen_work;
bool stopped;
bool adc_on;
};
static void da9052_ts_adc_toggle(struct da9052_tsi *tsi, bool on)
{
da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 0, on);
tsi->adc_on = on;
}
static irqreturn_t da9052_ts_pendwn_irq(int irq, void *data)
{
struct da9052_tsi *tsi = data;
if (!tsi->stopped) {
/* Mask PEN_DOWN event and unmask TSI_READY event */
da9052_disable_irq_nosync(tsi->da9052, DA9052_IRQ_PENDOWN);
da9052_enable_irq(tsi->da9052, DA9052_IRQ_TSIREADY);
da9052_ts_adc_toggle(tsi, true);
schedule_delayed_work(&tsi->ts_pen_work, HZ / 50);
}
return IRQ_HANDLED;
}
static void da9052_ts_read(struct da9052_tsi *tsi)
{
struct input_dev *input = tsi->dev;
int ret;
u16 x, y, z;
u8 v;
ret = da9052_reg_read(tsi->da9052, DA9052_TSI_X_MSB_REG);
if (ret < 0)
return;
x = (u16) ret;
ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Y_MSB_REG);
if (ret < 0)
return;
y = (u16) ret;
ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Z_MSB_REG);
if (ret < 0)
return;
z = (u16) ret;
ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG);
if (ret < 0)
return;
v = (u8) ret;
x = ((x << 2) & 0x3fc) | (v & 0x3);
y = ((y << 2) & 0x3fc) | ((v & 0xc) >> 2);
z = ((z << 2) & 0x3fc) | ((v & 0x30) >> 4);
input_report_key(input, BTN_TOUCH, 1);
input_report_abs(input, ABS_X, x);
input_report_abs(input, ABS_Y, y);
input_report_abs(input, ABS_PRESSURE, z);
input_sync(input);
}
static irqreturn_t da9052_ts_datardy_irq(int irq, void *data)
{
struct da9052_tsi *tsi = data;
da9052_ts_read(tsi);
return IRQ_HANDLED;
}
static void da9052_ts_pen_work(struct work_struct *work)
{
struct da9052_tsi *tsi = container_of(work, struct da9052_tsi,
ts_pen_work.work);
if (!tsi->stopped) {
int ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG);
if (ret < 0 || (ret & TSI_PEN_DOWN_STATUS)) {
/* Pen is still DOWN (or read error) */
schedule_delayed_work(&tsi->ts_pen_work, HZ / 50);
} else {
struct input_dev *input = tsi->dev;
/* Pen UP */
da9052_ts_adc_toggle(tsi, false);
/* Report Pen UP */
input_report_key(input, BTN_TOUCH, 0);
input_report_abs(input, ABS_PRESSURE, 0);
input_sync(input);
/*
* FIXME: Fixes the unhandled irq issue when quick
* pen down and pen up events occurs
*/
ret = da9052_reg_update(tsi->da9052,
DA9052_EVENT_B_REG, 0xC0, 0xC0);
if (ret < 0)
return;
/* Mask TSI_READY event and unmask PEN_DOWN event */
da9052_disable_irq(tsi->da9052, DA9052_IRQ_TSIREADY);
da9052_enable_irq(tsi->da9052, DA9052_IRQ_PENDOWN);
}
}
}
static int da9052_ts_configure_gpio(struct da9052 *da9052)
{
int error;
error = da9052_reg_update(da9052, DA9052_GPIO_2_3_REG, 0x30, 0);
if (error < 0)
return error;
error = da9052_reg_update(da9052, DA9052_GPIO_4_5_REG, 0x33, 0);
if (error < 0)
return error;
error = da9052_reg_update(da9052, DA9052_GPIO_6_7_REG, 0x33, 0);
if (error < 0)
return error;
return 0;
}
static int da9052_configure_tsi(struct da9052_tsi *tsi)
{
int error;
error = da9052_ts_configure_gpio(tsi->da9052);
if (error)
return error;
/* Measure TSI sample every 1ms */
error = da9052_reg_update(tsi->da9052, DA9052_ADC_CONT_REG,
1 << 6, 1 << 6);
if (error < 0)
return error;
/* TSI_DELAY: 3 slots, TSI_SKIP: 0 slots, TSI_MODE: XYZP */
error = da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 0xFC, 0xC0);
if (error < 0)
return error;
/* Supply TSIRef through LD09 */
error = da9052_reg_write(tsi->da9052, DA9052_LDO9_REG, 0x59);
if (error < 0)
return error;
return 0;
}
static int da9052_ts_input_open(struct input_dev *input_dev)
{
struct da9052_tsi *tsi = input_get_drvdata(input_dev);
tsi->stopped = false;
mb();
/* Unmask PEN_DOWN event */
da9052_enable_irq(tsi->da9052, DA9052_IRQ_PENDOWN);
/* Enable Pen Detect Circuit */
return da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG,
1 << 1, 1 << 1);
}
static void da9052_ts_input_close(struct input_dev *input_dev)
{
struct da9052_tsi *tsi = input_get_drvdata(input_dev);
tsi->stopped = true;
mb();
da9052_disable_irq(tsi->da9052, DA9052_IRQ_PENDOWN);
cancel_delayed_work_sync(&tsi->ts_pen_work);
if (tsi->adc_on) {
da9052_disable_irq(tsi->da9052, DA9052_IRQ_TSIREADY);
da9052_ts_adc_toggle(tsi, false);
/*
* If ADC was on that means that pendwn IRQ was disabled
* twice and we need to enable it to keep enable/disable
* counter balanced. IRQ is still off though.
*/
da9052_enable_irq(tsi->da9052, DA9052_IRQ_PENDOWN);
}
/* Disable Pen Detect Circuit */
da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 1, 0);
}
static int da9052_ts_probe(struct platform_device *pdev)
{
struct da9052 *da9052;
struct da9052_tsi *tsi;
struct input_dev *input_dev;
int error;
da9052 = dev_get_drvdata(pdev->dev.parent);
if (!da9052)
return -EINVAL;
tsi = kzalloc(sizeof(struct da9052_tsi), GFP_KERNEL);
input_dev = input_allocate_device();
if (!tsi || !input_dev) {
error = -ENOMEM;
goto err_free_mem;
}
tsi->da9052 = da9052;
tsi->dev = input_dev;
tsi->stopped = true;
INIT_DELAYED_WORK(&tsi->ts_pen_work, da9052_ts_pen_work);
input_dev->id.version = 0x0101;
input_dev->id.vendor = 0x15B6;
input_dev->id.product = 0x9052;
input_dev->name = "Dialog DA9052 TouchScreen Driver";
input_dev->dev.parent = &pdev->dev;
input_dev->open = da9052_ts_input_open;
input_dev->close = da9052_ts_input_close;
__set_bit(EV_ABS, input_dev->evbit);
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(BTN_TOUCH, input_dev->keybit);
input_set_abs_params(input_dev, ABS_X, 0, 1023, 0, 0);
input_set_abs_params(input_dev, ABS_Y, 0, 1023, 0, 0);
input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1023, 0, 0);
input_set_drvdata(input_dev, tsi);
/* Disable Pen Detect Circuit */
da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 1, 0);
/* Disable ADC */
da9052_ts_adc_toggle(tsi, false);
error = da9052_request_irq(tsi->da9052, DA9052_IRQ_PENDOWN,
"pendown-irq", da9052_ts_pendwn_irq, tsi);
if (error) {
dev_err(tsi->da9052->dev,
"Failed to register PENDWN IRQ: %d\n", error);
goto err_free_mem;
}
error = da9052_request_irq(tsi->da9052, DA9052_IRQ_TSIREADY,
"tsiready-irq", da9052_ts_datardy_irq, tsi);
if (error) {
dev_err(tsi->da9052->dev,
"Failed to register TSIRDY IRQ :%d\n", error);
goto err_free_pendwn_irq;
}
/* Mask PEN_DOWN and TSI_READY events */
da9052_disable_irq(tsi->da9052, DA9052_IRQ_PENDOWN);
da9052_disable_irq(tsi->da9052, DA9052_IRQ_TSIREADY);
error = da9052_configure_tsi(tsi);
if (error)
goto err_free_datardy_irq;
error = input_register_device(tsi->dev);
if (error)
goto err_free_datardy_irq;
platform_set_drvdata(pdev, tsi);
return 0;
err_free_datardy_irq:
da9052_free_irq(tsi->da9052, DA9052_IRQ_TSIREADY, tsi);
err_free_pendwn_irq:
da9052_free_irq(tsi->da9052, DA9052_IRQ_PENDOWN, tsi);
err_free_mem:
kfree(tsi);
input_free_device(input_dev);
return error;
}
static int da9052_ts_remove(struct platform_device *pdev)
{
struct da9052_tsi *tsi = platform_get_drvdata(pdev);
da9052_reg_write(tsi->da9052, DA9052_LDO9_REG, 0x19);
da9052_free_irq(tsi->da9052, DA9052_IRQ_TSIREADY, tsi);
da9052_free_irq(tsi->da9052, DA9052_IRQ_PENDOWN, tsi);
input_unregister_device(tsi->dev);
kfree(tsi);
return 0;
}
static struct platform_driver da9052_tsi_driver = {
.probe = da9052_ts_probe,
.remove = da9052_ts_remove,
.driver = {
.name = "da9052-tsi",
},
};
module_platform_driver(da9052_tsi_driver);
MODULE_DESCRIPTION("Touchscreen driver for Dialog Semiconductor DA9052");
MODULE_AUTHOR("Anthony Olech <[email protected]>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:da9052-tsi");
|
linux-master
|
drivers/input/touchscreen/da9052_tsi.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* TSC-40 serial touchscreen driver. It should be compatible with
* TSC-10 and 25.
*
* Author: Sebastian Andrzej Siewior <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/serio.h>
#define PACKET_LENGTH 5
struct tsc_ser {
struct input_dev *dev;
struct serio *serio;
u32 idx;
unsigned char data[PACKET_LENGTH];
char phys[32];
};
static void tsc_process_data(struct tsc_ser *ptsc)
{
struct input_dev *dev = ptsc->dev;
u8 *data = ptsc->data;
u32 x;
u32 y;
x = ((data[1] & 0x03) << 8) | data[2];
y = ((data[3] & 0x03) << 8) | data[4];
input_report_abs(dev, ABS_X, x);
input_report_abs(dev, ABS_Y, y);
input_report_key(dev, BTN_TOUCH, 1);
input_sync(dev);
}
static irqreturn_t tsc_interrupt(struct serio *serio,
unsigned char data, unsigned int flags)
{
struct tsc_ser *ptsc = serio_get_drvdata(serio);
struct input_dev *dev = ptsc->dev;
ptsc->data[ptsc->idx] = data;
switch (ptsc->idx++) {
case 0:
if (unlikely((data & 0x3e) != 0x10)) {
dev_dbg(&serio->dev,
"unsynchronized packet start (0x%02x)\n", data);
ptsc->idx = 0;
} else if (!(data & 0x01)) {
input_report_key(dev, BTN_TOUCH, 0);
input_sync(dev);
ptsc->idx = 0;
}
break;
case 1:
case 3:
if (unlikely(data & 0xfc)) {
dev_dbg(&serio->dev,
"unsynchronized data 0x%02x at offset %d\n",
data, ptsc->idx - 1);
ptsc->idx = 0;
}
break;
case 4:
tsc_process_data(ptsc);
ptsc->idx = 0;
break;
}
return IRQ_HANDLED;
}
static int tsc_connect(struct serio *serio, struct serio_driver *drv)
{
struct tsc_ser *ptsc;
struct input_dev *input_dev;
int error;
ptsc = kzalloc(sizeof(struct tsc_ser), GFP_KERNEL);
input_dev = input_allocate_device();
if (!ptsc || !input_dev) {
error = -ENOMEM;
goto fail1;
}
ptsc->serio = serio;
ptsc->dev = input_dev;
snprintf(ptsc->phys, sizeof(ptsc->phys), "%s/input0", serio->phys);
input_dev->name = "TSC-10/25/40 Serial TouchScreen";
input_dev->phys = ptsc->phys;
input_dev->id.bustype = BUS_RS232;
input_dev->id.vendor = SERIO_TSC40;
input_dev->id.product = 40;
input_dev->id.version = 0x0001;
input_dev->dev.parent = &serio->dev;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
__set_bit(BTN_TOUCH, input_dev->keybit);
input_set_abs_params(ptsc->dev, ABS_X, 0, 0x3ff, 0, 0);
input_set_abs_params(ptsc->dev, ABS_Y, 0, 0x3ff, 0, 0);
serio_set_drvdata(serio, ptsc);
error = serio_open(serio, drv);
if (error)
goto fail2;
error = input_register_device(ptsc->dev);
if (error)
goto fail3;
return 0;
fail3:
serio_close(serio);
fail2:
serio_set_drvdata(serio, NULL);
fail1:
input_free_device(input_dev);
kfree(ptsc);
return error;
}
static void tsc_disconnect(struct serio *serio)
{
struct tsc_ser *ptsc = serio_get_drvdata(serio);
serio_close(serio);
input_unregister_device(ptsc->dev);
kfree(ptsc);
serio_set_drvdata(serio, NULL);
}
static const struct serio_device_id tsc_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_TSC40,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, tsc_serio_ids);
#define DRIVER_DESC "TSC-10/25/40 serial touchscreen driver"
static struct serio_driver tsc_drv = {
.driver = {
.name = "tsc40",
},
.description = DRIVER_DESC,
.id_table = tsc_serio_ids,
.interrupt = tsc_interrupt,
.connect = tsc_connect,
.disconnect = tsc_disconnect,
};
module_serio_driver(tsc_drv);
MODULE_AUTHOR("Sebastian Andrzej Siewior <[email protected]>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL v2");
|
linux-master
|
drivers/input/touchscreen/tsc40.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Surface2.0/SUR40/PixelSense input driver
*
* Copyright (c) 2014 by Florian 'floe' Echtler <[email protected]>
*
* Derived from the USB Skeleton driver 1.1,
* Copyright (c) 2003 Greg Kroah-Hartman ([email protected])
*
* and from the Apple USB BCM5974 multitouch driver,
* Copyright (c) 2008 Henrik Rydberg ([email protected])
*
* and from the generic hid-multitouch driver,
* Copyright (c) 2010-2012 Stephane Chatty <[email protected]>
*
* and from the v4l2-pci-skeleton driver,
* Copyright (c) Copyright 2014 Cisco Systems, Inc.
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/completion.h>
#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/printk.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/usb/input.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-dma-sg.h>
/* read 512 bytes from endpoint 0x86 -> get header + blobs */
struct sur40_header {
__le16 type; /* always 0x0001 */
__le16 count; /* count of blobs (if 0: continue prev. packet) */
__le32 packet_id; /* unique ID for all packets in one frame */
__le32 timestamp; /* milliseconds (inc. by 16 or 17 each frame) */
__le32 unknown; /* "epoch?" always 02/03 00 00 00 */
} __packed;
struct sur40_blob {
__le16 blob_id;
u8 action; /* 0x02 = enter/exit, 0x03 = update (?) */
u8 type; /* bitmask (0x01 blob, 0x02 touch, 0x04 tag) */
__le16 bb_pos_x; /* upper left corner of bounding box */
__le16 bb_pos_y;
__le16 bb_size_x; /* size of bounding box */
__le16 bb_size_y;
__le16 pos_x; /* finger tip position */
__le16 pos_y;
__le16 ctr_x; /* centroid position */
__le16 ctr_y;
__le16 axis_x; /* somehow related to major/minor axis, mostly: */
__le16 axis_y; /* axis_x == bb_size_y && axis_y == bb_size_x */
__le32 angle; /* orientation in radians relative to x axis -
actually an IEEE754 float, don't use in kernel */
__le32 area; /* size in pixels/pressure (?) */
u8 padding[24];
__le32 tag_id; /* valid when type == 0x04 (SUR40_TAG) */
__le32 unknown;
} __packed;
/* combined header/blob data */
struct sur40_data {
struct sur40_header header;
struct sur40_blob blobs[];
} __packed;
/* read 512 bytes from endpoint 0x82 -> get header below
* continue reading 16k blocks until header.size bytes read */
struct sur40_image_header {
__le32 magic; /* "SUBF" */
__le32 packet_id;
__le32 size; /* always 0x0007e900 = 960x540 */
__le32 timestamp; /* milliseconds (increases by 16 or 17 each frame) */
__le32 unknown; /* "epoch?" always 02/03 00 00 00 */
} __packed;
/* version information */
#define DRIVER_SHORT "sur40"
#define DRIVER_LONG "Samsung SUR40"
#define DRIVER_AUTHOR "Florian 'floe' Echtler <[email protected]>"
#define DRIVER_DESC "Surface2.0/SUR40/PixelSense input driver"
/* vendor and device IDs */
#define ID_MICROSOFT 0x045e
#define ID_SUR40 0x0775
/* sensor resolution */
#define SENSOR_RES_X 1920
#define SENSOR_RES_Y 1080
/* touch data endpoint */
#define TOUCH_ENDPOINT 0x86
/* video data endpoint */
#define VIDEO_ENDPOINT 0x82
/* video header fields */
#define VIDEO_HEADER_MAGIC 0x46425553
#define VIDEO_PACKET_SIZE 16384
/* polling interval (ms) */
#define POLL_INTERVAL 1
/* maximum number of contacts FIXME: this is a guess? */
#define MAX_CONTACTS 64
/* control commands */
#define SUR40_GET_VERSION 0xb0 /* 12 bytes string */
#define SUR40_ACCEL_CAPS 0xb3 /* 5 bytes */
#define SUR40_SENSOR_CAPS 0xc1 /* 24 bytes */
#define SUR40_POKE 0xc5 /* poke register byte */
#define SUR40_PEEK 0xc4 /* 48 bytes registers */
#define SUR40_GET_STATE 0xc5 /* 4 bytes state (?) */
#define SUR40_GET_SENSORS 0xb1 /* 8 bytes sensors */
#define SUR40_BLOB 0x01
#define SUR40_TOUCH 0x02
#define SUR40_TAG 0x04
/* video controls */
#define SUR40_BRIGHTNESS_MAX 0xff
#define SUR40_BRIGHTNESS_MIN 0x00
#define SUR40_BRIGHTNESS_DEF 0xff
#define SUR40_CONTRAST_MAX 0x0f
#define SUR40_CONTRAST_MIN 0x00
#define SUR40_CONTRAST_DEF 0x0a
#define SUR40_GAIN_MAX 0x09
#define SUR40_GAIN_MIN 0x00
#define SUR40_GAIN_DEF 0x08
#define SUR40_BACKLIGHT_MAX 0x01
#define SUR40_BACKLIGHT_MIN 0x00
#define SUR40_BACKLIGHT_DEF 0x01
#define sur40_str(s) #s
#define SUR40_PARAM_RANGE(lo, hi) " (range " sur40_str(lo) "-" sur40_str(hi) ")"
/* module parameters */
static uint brightness = SUR40_BRIGHTNESS_DEF;
module_param(brightness, uint, 0644);
MODULE_PARM_DESC(brightness, "set initial brightness"
SUR40_PARAM_RANGE(SUR40_BRIGHTNESS_MIN, SUR40_BRIGHTNESS_MAX));
static uint contrast = SUR40_CONTRAST_DEF;
module_param(contrast, uint, 0644);
MODULE_PARM_DESC(contrast, "set initial contrast"
SUR40_PARAM_RANGE(SUR40_CONTRAST_MIN, SUR40_CONTRAST_MAX));
static uint gain = SUR40_GAIN_DEF;
module_param(gain, uint, 0644);
MODULE_PARM_DESC(gain, "set initial gain"
SUR40_PARAM_RANGE(SUR40_GAIN_MIN, SUR40_GAIN_MAX));
static const struct v4l2_pix_format sur40_pix_format[] = {
{
.pixelformat = V4L2_TCH_FMT_TU08,
.width = SENSOR_RES_X / 2,
.height = SENSOR_RES_Y / 2,
.field = V4L2_FIELD_NONE,
.colorspace = V4L2_COLORSPACE_RAW,
.bytesperline = SENSOR_RES_X / 2,
.sizeimage = (SENSOR_RES_X/2) * (SENSOR_RES_Y/2),
},
{
.pixelformat = V4L2_PIX_FMT_GREY,
.width = SENSOR_RES_X / 2,
.height = SENSOR_RES_Y / 2,
.field = V4L2_FIELD_NONE,
.colorspace = V4L2_COLORSPACE_RAW,
.bytesperline = SENSOR_RES_X / 2,
.sizeimage = (SENSOR_RES_X/2) * (SENSOR_RES_Y/2),
}
};
/* master device state */
struct sur40_state {
struct usb_device *usbdev;
struct device *dev;
struct input_dev *input;
struct v4l2_device v4l2;
struct video_device vdev;
struct mutex lock;
struct v4l2_pix_format pix_fmt;
struct v4l2_ctrl_handler hdl;
struct vb2_queue queue;
struct list_head buf_list;
spinlock_t qlock;
int sequence;
struct sur40_data *bulk_in_buffer;
size_t bulk_in_size;
u8 bulk_in_epaddr;
u8 vsvideo;
char phys[64];
};
struct sur40_buffer {
struct vb2_v4l2_buffer vb;
struct list_head list;
};
/* forward declarations */
static const struct video_device sur40_video_device;
static const struct vb2_queue sur40_queue;
static void sur40_process_video(struct sur40_state *sur40);
static int sur40_s_ctrl(struct v4l2_ctrl *ctrl);
static const struct v4l2_ctrl_ops sur40_ctrl_ops = {
.s_ctrl = sur40_s_ctrl,
};
/*
* Note: an earlier, non-public version of this driver used USB_RECIP_ENDPOINT
* here by mistake which is very likely to have corrupted the firmware EEPROM
* on two separate SUR40 devices. Thanks to Alan Stern who spotted this bug.
* Should you ever run into a similar problem, the background story to this
* incident and instructions on how to fix the corrupted EEPROM are available
* at https://floe.butterbrot.org/matrix/hacking/surface/brick.html
*/
/* command wrapper */
static int sur40_command(struct sur40_state *dev,
u8 command, u16 index, void *buffer, u16 size)
{
return usb_control_msg(dev->usbdev, usb_rcvctrlpipe(dev->usbdev, 0),
command,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
0x00, index, buffer, size, 1000);
}
/* poke a byte in the panel register space */
static int sur40_poke(struct sur40_state *dev, u8 offset, u8 value)
{
int result;
u8 index = 0x96; // 0xae for permanent write
result = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0),
SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
0x32, index, NULL, 0, 1000);
if (result < 0)
goto error;
msleep(5);
result = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0),
SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
0x72, offset, NULL, 0, 1000);
if (result < 0)
goto error;
msleep(5);
result = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0),
SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
0xb2, value, NULL, 0, 1000);
if (result < 0)
goto error;
msleep(5);
error:
return result;
}
static int sur40_set_preprocessor(struct sur40_state *dev, u8 value)
{
u8 setting_07[2] = { 0x01, 0x00 };
u8 setting_17[2] = { 0x85, 0x80 };
int result;
if (value > 1)
return -ERANGE;
result = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0),
SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
0x07, setting_07[value], NULL, 0, 1000);
if (result < 0)
goto error;
msleep(5);
result = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0),
SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
0x17, setting_17[value], NULL, 0, 1000);
if (result < 0)
goto error;
msleep(5);
error:
return result;
}
static void sur40_set_vsvideo(struct sur40_state *handle, u8 value)
{
int i;
for (i = 0; i < 4; i++)
sur40_poke(handle, 0x1c+i, value);
handle->vsvideo = value;
}
static void sur40_set_irlevel(struct sur40_state *handle, u8 value)
{
int i;
for (i = 0; i < 8; i++)
sur40_poke(handle, 0x08+(2*i), value);
}
/* Initialization routine, called from sur40_open */
static int sur40_init(struct sur40_state *dev)
{
int result;
u8 *buffer;
buffer = kmalloc(24, GFP_KERNEL);
if (!buffer) {
result = -ENOMEM;
goto error;
}
/* stupidly replay the original MS driver init sequence */
result = sur40_command(dev, SUR40_GET_VERSION, 0x00, buffer, 12);
if (result < 0)
goto error;
result = sur40_command(dev, SUR40_GET_VERSION, 0x01, buffer, 12);
if (result < 0)
goto error;
result = sur40_command(dev, SUR40_GET_VERSION, 0x02, buffer, 12);
if (result < 0)
goto error;
result = sur40_command(dev, SUR40_SENSOR_CAPS, 0x00, buffer, 24);
if (result < 0)
goto error;
result = sur40_command(dev, SUR40_ACCEL_CAPS, 0x00, buffer, 5);
if (result < 0)
goto error;
result = sur40_command(dev, SUR40_GET_VERSION, 0x03, buffer, 12);
if (result < 0)
goto error;
result = 0;
/*
* Discard the result buffer - no known data inside except
* some version strings, maybe extract these sometime...
*/
error:
kfree(buffer);
return result;
}
/*
* Callback routines from input_dev
*/
/* Enable the device, polling will now start. */
static int sur40_open(struct input_dev *input)
{
struct sur40_state *sur40 = input_get_drvdata(input);
dev_dbg(sur40->dev, "open\n");
return sur40_init(sur40);
}
/* Disable device, polling has stopped. */
static void sur40_close(struct input_dev *input)
{
struct sur40_state *sur40 = input_get_drvdata(input);
dev_dbg(sur40->dev, "close\n");
/*
* There is no known way to stop the device, so we simply
* stop polling.
*/
}
/*
* This function is called when a whole contact has been processed,
* so that it can assign it to a slot and store the data there.
*/
static void sur40_report_blob(struct sur40_blob *blob, struct input_dev *input)
{
int wide, major, minor;
int bb_size_x, bb_size_y, pos_x, pos_y, ctr_x, ctr_y, slotnum;
if (blob->type != SUR40_TOUCH)
return;
slotnum = input_mt_get_slot_by_key(input, blob->blob_id);
if (slotnum < 0 || slotnum >= MAX_CONTACTS)
return;
bb_size_x = le16_to_cpu(blob->bb_size_x);
bb_size_y = le16_to_cpu(blob->bb_size_y);
pos_x = le16_to_cpu(blob->pos_x);
pos_y = le16_to_cpu(blob->pos_y);
ctr_x = le16_to_cpu(blob->ctr_x);
ctr_y = le16_to_cpu(blob->ctr_y);
input_mt_slot(input, slotnum);
input_mt_report_slot_state(input, MT_TOOL_FINGER, 1);
wide = (bb_size_x > bb_size_y);
major = max(bb_size_x, bb_size_y);
minor = min(bb_size_x, bb_size_y);
input_report_abs(input, ABS_MT_POSITION_X, pos_x);
input_report_abs(input, ABS_MT_POSITION_Y, pos_y);
input_report_abs(input, ABS_MT_TOOL_X, ctr_x);
input_report_abs(input, ABS_MT_TOOL_Y, ctr_y);
/* TODO: use a better orientation measure */
input_report_abs(input, ABS_MT_ORIENTATION, wide);
input_report_abs(input, ABS_MT_TOUCH_MAJOR, major);
input_report_abs(input, ABS_MT_TOUCH_MINOR, minor);
}
/* core function: poll for new input data */
static void sur40_poll(struct input_dev *input)
{
struct sur40_state *sur40 = input_get_drvdata(input);
int result, bulk_read, need_blobs, packet_blobs, i;
struct sur40_header *header = &sur40->bulk_in_buffer->header;
struct sur40_blob *inblob = &sur40->bulk_in_buffer->blobs[0];
dev_dbg(sur40->dev, "poll\n");
need_blobs = -1;
do {
/* perform a blocking bulk read to get data from the device */
result = usb_bulk_msg(sur40->usbdev,
usb_rcvbulkpipe(sur40->usbdev, sur40->bulk_in_epaddr),
sur40->bulk_in_buffer, sur40->bulk_in_size,
&bulk_read, 1000);
dev_dbg(sur40->dev, "received %d bytes\n", bulk_read);
if (result < 0) {
dev_err(sur40->dev, "error in usb_bulk_read\n");
return;
}
result = bulk_read - sizeof(struct sur40_header);
if (result % sizeof(struct sur40_blob) != 0) {
dev_err(sur40->dev, "transfer size mismatch\n");
return;
}
/* first packet? */
if (need_blobs == -1) {
need_blobs = le16_to_cpu(header->count);
dev_dbg(sur40->dev, "need %d blobs\n", need_blobs);
/* packet_id = le32_to_cpu(header->packet_id); */
}
/*
* Sanity check. when video data is also being retrieved, the
* packet ID will usually increase in the middle of a series
* instead of at the end. However, the data is still consistent,
* so the packet ID is probably just valid for the first packet
* in a series.
if (packet_id != le32_to_cpu(header->packet_id))
dev_dbg(sur40->dev, "packet ID mismatch\n");
*/
packet_blobs = result / sizeof(struct sur40_blob);
dev_dbg(sur40->dev, "received %d blobs\n", packet_blobs);
/* packets always contain at least 4 blobs, even if empty */
if (packet_blobs > need_blobs)
packet_blobs = need_blobs;
for (i = 0; i < packet_blobs; i++) {
need_blobs--;
dev_dbg(sur40->dev, "processing blob\n");
sur40_report_blob(&(inblob[i]), input);
}
} while (need_blobs > 0);
input_mt_sync_frame(input);
input_sync(input);
sur40_process_video(sur40);
}
/* deal with video data */
static void sur40_process_video(struct sur40_state *sur40)
{
struct sur40_image_header *img = (void *)(sur40->bulk_in_buffer);
struct sur40_buffer *new_buf;
struct usb_sg_request sgr;
struct sg_table *sgt;
int result, bulk_read;
if (!vb2_start_streaming_called(&sur40->queue))
return;
/* get a new buffer from the list */
spin_lock(&sur40->qlock);
if (list_empty(&sur40->buf_list)) {
dev_dbg(sur40->dev, "buffer queue empty\n");
spin_unlock(&sur40->qlock);
return;
}
new_buf = list_entry(sur40->buf_list.next, struct sur40_buffer, list);
list_del(&new_buf->list);
spin_unlock(&sur40->qlock);
dev_dbg(sur40->dev, "buffer acquired\n");
/* retrieve data via bulk read */
result = usb_bulk_msg(sur40->usbdev,
usb_rcvbulkpipe(sur40->usbdev, VIDEO_ENDPOINT),
sur40->bulk_in_buffer, sur40->bulk_in_size,
&bulk_read, 1000);
if (result < 0) {
dev_err(sur40->dev, "error in usb_bulk_read\n");
goto err_poll;
}
if (bulk_read != sizeof(struct sur40_image_header)) {
dev_err(sur40->dev, "received %d bytes (%zd expected)\n",
bulk_read, sizeof(struct sur40_image_header));
goto err_poll;
}
if (le32_to_cpu(img->magic) != VIDEO_HEADER_MAGIC) {
dev_err(sur40->dev, "image magic mismatch\n");
goto err_poll;
}
if (le32_to_cpu(img->size) != sur40->pix_fmt.sizeimage) {
dev_err(sur40->dev, "image size mismatch\n");
goto err_poll;
}
dev_dbg(sur40->dev, "header acquired\n");
sgt = vb2_dma_sg_plane_desc(&new_buf->vb.vb2_buf, 0);
result = usb_sg_init(&sgr, sur40->usbdev,
usb_rcvbulkpipe(sur40->usbdev, VIDEO_ENDPOINT), 0,
sgt->sgl, sgt->nents, sur40->pix_fmt.sizeimage, 0);
if (result < 0) {
dev_err(sur40->dev, "error %d in usb_sg_init\n", result);
goto err_poll;
}
usb_sg_wait(&sgr);
if (sgr.status < 0) {
dev_err(sur40->dev, "error %d in usb_sg_wait\n", sgr.status);
goto err_poll;
}
dev_dbg(sur40->dev, "image acquired\n");
/* return error if streaming was stopped in the meantime */
if (sur40->sequence == -1)
return;
/* mark as finished */
new_buf->vb.vb2_buf.timestamp = ktime_get_ns();
new_buf->vb.sequence = sur40->sequence++;
new_buf->vb.field = V4L2_FIELD_NONE;
vb2_buffer_done(&new_buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
dev_dbg(sur40->dev, "buffer marked done\n");
return;
err_poll:
vb2_buffer_done(&new_buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
}
/* Initialize input device parameters. */
static int sur40_input_setup_events(struct input_dev *input_dev)
{
int error;
input_set_abs_params(input_dev, ABS_MT_POSITION_X,
0, SENSOR_RES_X, 0, 0);
input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
0, SENSOR_RES_Y, 0, 0);
input_set_abs_params(input_dev, ABS_MT_TOOL_X,
0, SENSOR_RES_X, 0, 0);
input_set_abs_params(input_dev, ABS_MT_TOOL_Y,
0, SENSOR_RES_Y, 0, 0);
/* max value unknown, but major/minor axis
* can never be larger than screen */
input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
0, SENSOR_RES_X, 0, 0);
input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR,
0, SENSOR_RES_Y, 0, 0);
input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0);
error = input_mt_init_slots(input_dev, MAX_CONTACTS,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
if (error) {
dev_err(input_dev->dev.parent, "failed to set up slots\n");
return error;
}
return 0;
}
/* Check candidate USB interface. */
static int sur40_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
struct usb_device *usbdev = interface_to_usbdev(interface);
struct sur40_state *sur40;
struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
struct input_dev *input;
int error;
/* Check if we really have the right interface. */
iface_desc = interface->cur_altsetting;
if (iface_desc->desc.bInterfaceClass != 0xFF)
return -ENODEV;
if (iface_desc->desc.bNumEndpoints < 5)
return -ENODEV;
/* Use endpoint #4 (0x86). */
endpoint = &iface_desc->endpoint[4].desc;
if (endpoint->bEndpointAddress != TOUCH_ENDPOINT)
return -ENODEV;
/* Allocate memory for our device state and initialize it. */
sur40 = kzalloc(sizeof(struct sur40_state), GFP_KERNEL);
if (!sur40)
return -ENOMEM;
input = input_allocate_device();
if (!input) {
error = -ENOMEM;
goto err_free_dev;
}
/* initialize locks/lists */
INIT_LIST_HEAD(&sur40->buf_list);
spin_lock_init(&sur40->qlock);
mutex_init(&sur40->lock);
/* Set up regular input device structure */
input->name = DRIVER_LONG;
usb_to_input_id(usbdev, &input->id);
usb_make_path(usbdev, sur40->phys, sizeof(sur40->phys));
strlcat(sur40->phys, "/input0", sizeof(sur40->phys));
input->phys = sur40->phys;
input->dev.parent = &interface->dev;
input->open = sur40_open;
input->close = sur40_close;
error = sur40_input_setup_events(input);
if (error)
goto err_free_input;
input_set_drvdata(input, sur40);
error = input_setup_polling(input, sur40_poll);
if (error) {
dev_err(&interface->dev, "failed to set up polling");
goto err_free_input;
}
input_set_poll_interval(input, POLL_INTERVAL);
sur40->usbdev = usbdev;
sur40->dev = &interface->dev;
sur40->input = input;
/* use the bulk-in endpoint tested above */
sur40->bulk_in_size = usb_endpoint_maxp(endpoint);
sur40->bulk_in_epaddr = endpoint->bEndpointAddress;
sur40->bulk_in_buffer = kmalloc(sur40->bulk_in_size, GFP_KERNEL);
if (!sur40->bulk_in_buffer) {
dev_err(&interface->dev, "Unable to allocate input buffer.");
error = -ENOMEM;
goto err_free_input;
}
/* register the polled input device */
error = input_register_device(input);
if (error) {
dev_err(&interface->dev,
"Unable to register polled input device.");
goto err_free_buffer;
}
/* register the video master device */
snprintf(sur40->v4l2.name, sizeof(sur40->v4l2.name), "%s", DRIVER_LONG);
error = v4l2_device_register(sur40->dev, &sur40->v4l2);
if (error) {
dev_err(&interface->dev,
"Unable to register video master device.");
goto err_unreg_v4l2;
}
/* initialize the lock and subdevice */
sur40->queue = sur40_queue;
sur40->queue.drv_priv = sur40;
sur40->queue.lock = &sur40->lock;
sur40->queue.dev = sur40->dev;
/* initialize the queue */
error = vb2_queue_init(&sur40->queue);
if (error)
goto err_unreg_v4l2;
sur40->pix_fmt = sur40_pix_format[0];
sur40->vdev = sur40_video_device;
sur40->vdev.v4l2_dev = &sur40->v4l2;
sur40->vdev.lock = &sur40->lock;
sur40->vdev.queue = &sur40->queue;
video_set_drvdata(&sur40->vdev, sur40);
/* initialize the control handler for 4 controls */
v4l2_ctrl_handler_init(&sur40->hdl, 4);
sur40->v4l2.ctrl_handler = &sur40->hdl;
sur40->vsvideo = (SUR40_CONTRAST_DEF << 4) | SUR40_GAIN_DEF;
v4l2_ctrl_new_std(&sur40->hdl, &sur40_ctrl_ops, V4L2_CID_BRIGHTNESS,
SUR40_BRIGHTNESS_MIN, SUR40_BRIGHTNESS_MAX, 1, clamp(brightness,
(uint)SUR40_BRIGHTNESS_MIN, (uint)SUR40_BRIGHTNESS_MAX));
v4l2_ctrl_new_std(&sur40->hdl, &sur40_ctrl_ops, V4L2_CID_CONTRAST,
SUR40_CONTRAST_MIN, SUR40_CONTRAST_MAX, 1, clamp(contrast,
(uint)SUR40_CONTRAST_MIN, (uint)SUR40_CONTRAST_MAX));
v4l2_ctrl_new_std(&sur40->hdl, &sur40_ctrl_ops, V4L2_CID_GAIN,
SUR40_GAIN_MIN, SUR40_GAIN_MAX, 1, clamp(gain,
(uint)SUR40_GAIN_MIN, (uint)SUR40_GAIN_MAX));
v4l2_ctrl_new_std(&sur40->hdl, &sur40_ctrl_ops,
V4L2_CID_BACKLIGHT_COMPENSATION, SUR40_BACKLIGHT_MIN,
SUR40_BACKLIGHT_MAX, 1, SUR40_BACKLIGHT_DEF);
v4l2_ctrl_handler_setup(&sur40->hdl);
if (sur40->hdl.error) {
dev_err(&interface->dev,
"Unable to register video controls.");
v4l2_ctrl_handler_free(&sur40->hdl);
error = sur40->hdl.error;
goto err_unreg_v4l2;
}
error = video_register_device(&sur40->vdev, VFL_TYPE_TOUCH, -1);
if (error) {
dev_err(&interface->dev,
"Unable to register video subdevice.");
goto err_unreg_video;
}
/* we can register the device now, as it is ready */
usb_set_intfdata(interface, sur40);
dev_dbg(&interface->dev, "%s is now attached\n", DRIVER_DESC);
return 0;
err_unreg_video:
video_unregister_device(&sur40->vdev);
err_unreg_v4l2:
v4l2_device_unregister(&sur40->v4l2);
err_free_buffer:
kfree(sur40->bulk_in_buffer);
err_free_input:
input_free_device(input);
err_free_dev:
kfree(sur40);
return error;
}
/* Unregister device & clean up. */
static void sur40_disconnect(struct usb_interface *interface)
{
struct sur40_state *sur40 = usb_get_intfdata(interface);
v4l2_ctrl_handler_free(&sur40->hdl);
video_unregister_device(&sur40->vdev);
v4l2_device_unregister(&sur40->v4l2);
input_unregister_device(sur40->input);
kfree(sur40->bulk_in_buffer);
kfree(sur40);
usb_set_intfdata(interface, NULL);
dev_dbg(&interface->dev, "%s is now disconnected\n", DRIVER_DESC);
}
/*
* Setup the constraints of the queue: besides setting the number of planes
* per buffer and the size and allocation context of each plane, it also
* checks if sufficient buffers have been allocated. Usually 3 is a good
* minimum number: many DMA engines need a minimum of 2 buffers in the
* queue and you need to have another available for userspace processing.
*/
static int sur40_queue_setup(struct vb2_queue *q,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], struct device *alloc_devs[])
{
struct sur40_state *sur40 = vb2_get_drv_priv(q);
if (q->num_buffers + *nbuffers < 3)
*nbuffers = 3 - q->num_buffers;
if (*nplanes)
return sizes[0] < sur40->pix_fmt.sizeimage ? -EINVAL : 0;
*nplanes = 1;
sizes[0] = sur40->pix_fmt.sizeimage;
return 0;
}
/*
* Prepare the buffer for queueing to the DMA engine: check and set the
* payload size.
*/
static int sur40_buffer_prepare(struct vb2_buffer *vb)
{
struct sur40_state *sur40 = vb2_get_drv_priv(vb->vb2_queue);
unsigned long size = sur40->pix_fmt.sizeimage;
if (vb2_plane_size(vb, 0) < size) {
dev_err(&sur40->usbdev->dev, "buffer too small (%lu < %lu)\n",
vb2_plane_size(vb, 0), size);
return -EINVAL;
}
vb2_set_plane_payload(vb, 0, size);
return 0;
}
/*
* Queue this buffer to the DMA engine.
*/
static void sur40_buffer_queue(struct vb2_buffer *vb)
{
struct sur40_state *sur40 = vb2_get_drv_priv(vb->vb2_queue);
struct sur40_buffer *buf = (struct sur40_buffer *)vb;
spin_lock(&sur40->qlock);
list_add_tail(&buf->list, &sur40->buf_list);
spin_unlock(&sur40->qlock);
}
static void return_all_buffers(struct sur40_state *sur40,
enum vb2_buffer_state state)
{
struct sur40_buffer *buf, *node;
spin_lock(&sur40->qlock);
list_for_each_entry_safe(buf, node, &sur40->buf_list, list) {
vb2_buffer_done(&buf->vb.vb2_buf, state);
list_del(&buf->list);
}
spin_unlock(&sur40->qlock);
}
/*
* Start streaming. First check if the minimum number of buffers have been
* queued. If not, then return -ENOBUFS and the vb2 framework will call
* this function again the next time a buffer has been queued until enough
* buffers are available to actually start the DMA engine.
*/
static int sur40_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct sur40_state *sur40 = vb2_get_drv_priv(vq);
sur40->sequence = 0;
return 0;
}
/*
* Stop the DMA engine. Any remaining buffers in the DMA queue are dequeued
* and passed on to the vb2 framework marked as STATE_ERROR.
*/
static void sur40_stop_streaming(struct vb2_queue *vq)
{
struct sur40_state *sur40 = vb2_get_drv_priv(vq);
vb2_wait_for_all_buffers(vq);
sur40->sequence = -1;
/* Release all active buffers */
return_all_buffers(sur40, VB2_BUF_STATE_ERROR);
}
/* V4L ioctl */
static int sur40_vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct sur40_state *sur40 = video_drvdata(file);
strscpy(cap->driver, DRIVER_SHORT, sizeof(cap->driver));
strscpy(cap->card, DRIVER_LONG, sizeof(cap->card));
usb_make_path(sur40->usbdev, cap->bus_info, sizeof(cap->bus_info));
return 0;
}
static int sur40_vidioc_enum_input(struct file *file, void *priv,
struct v4l2_input *i)
{
if (i->index != 0)
return -EINVAL;
i->type = V4L2_INPUT_TYPE_TOUCH;
i->std = V4L2_STD_UNKNOWN;
strscpy(i->name, "In-Cell Sensor", sizeof(i->name));
i->capabilities = 0;
return 0;
}
static int sur40_vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
return (i == 0) ? 0 : -EINVAL;
}
static int sur40_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
*i = 0;
return 0;
}
static int sur40_vidioc_try_fmt(struct file *file, void *priv,
struct v4l2_format *f)
{
switch (f->fmt.pix.pixelformat) {
case V4L2_PIX_FMT_GREY:
f->fmt.pix = sur40_pix_format[1];
break;
default:
f->fmt.pix = sur40_pix_format[0];
break;
}
return 0;
}
static int sur40_vidioc_s_fmt(struct file *file, void *priv,
struct v4l2_format *f)
{
struct sur40_state *sur40 = video_drvdata(file);
switch (f->fmt.pix.pixelformat) {
case V4L2_PIX_FMT_GREY:
sur40->pix_fmt = sur40_pix_format[1];
break;
default:
sur40->pix_fmt = sur40_pix_format[0];
break;
}
f->fmt.pix = sur40->pix_fmt;
return 0;
}
static int sur40_vidioc_g_fmt(struct file *file, void *priv,
struct v4l2_format *f)
{
struct sur40_state *sur40 = video_drvdata(file);
f->fmt.pix = sur40->pix_fmt;
return 0;
}
static int sur40_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct sur40_state *sur40 = container_of(ctrl->handler,
struct sur40_state, hdl);
u8 value = sur40->vsvideo;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
sur40_set_irlevel(sur40, ctrl->val);
break;
case V4L2_CID_CONTRAST:
value = (value & 0x0f) | (ctrl->val << 4);
sur40_set_vsvideo(sur40, value);
break;
case V4L2_CID_GAIN:
value = (value & 0xf0) | (ctrl->val);
sur40_set_vsvideo(sur40, value);
break;
case V4L2_CID_BACKLIGHT_COMPENSATION:
sur40_set_preprocessor(sur40, ctrl->val);
break;
}
return 0;
}
static int sur40_ioctl_parm(struct file *file, void *priv,
struct v4l2_streamparm *p)
{
if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
p->parm.capture.timeperframe.numerator = 1;
p->parm.capture.timeperframe.denominator = 60;
p->parm.capture.readbuffers = 3;
return 0;
}
static int sur40_vidioc_enum_fmt(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
if (f->index >= ARRAY_SIZE(sur40_pix_format))
return -EINVAL;
f->pixelformat = sur40_pix_format[f->index].pixelformat;
f->flags = 0;
return 0;
}
static int sur40_vidioc_enum_framesizes(struct file *file, void *priv,
struct v4l2_frmsizeenum *f)
{
struct sur40_state *sur40 = video_drvdata(file);
if ((f->index != 0) || ((f->pixel_format != V4L2_TCH_FMT_TU08)
&& (f->pixel_format != V4L2_PIX_FMT_GREY)))
return -EINVAL;
f->type = V4L2_FRMSIZE_TYPE_DISCRETE;
f->discrete.width = sur40->pix_fmt.width;
f->discrete.height = sur40->pix_fmt.height;
return 0;
}
static int sur40_vidioc_enum_frameintervals(struct file *file, void *priv,
struct v4l2_frmivalenum *f)
{
struct sur40_state *sur40 = video_drvdata(file);
if ((f->index > 0) || ((f->pixel_format != V4L2_TCH_FMT_TU08)
&& (f->pixel_format != V4L2_PIX_FMT_GREY))
|| (f->width != sur40->pix_fmt.width)
|| (f->height != sur40->pix_fmt.height))
return -EINVAL;
f->type = V4L2_FRMIVAL_TYPE_DISCRETE;
f->discrete.denominator = 60;
f->discrete.numerator = 1;
return 0;
}
static const struct usb_device_id sur40_table[] = {
{ USB_DEVICE(ID_MICROSOFT, ID_SUR40) }, /* Samsung SUR40 */
{ } /* terminating null entry */
};
MODULE_DEVICE_TABLE(usb, sur40_table);
/* V4L2 structures */
static const struct vb2_ops sur40_queue_ops = {
.queue_setup = sur40_queue_setup,
.buf_prepare = sur40_buffer_prepare,
.buf_queue = sur40_buffer_queue,
.start_streaming = sur40_start_streaming,
.stop_streaming = sur40_stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
static const struct vb2_queue sur40_queue = {
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
/*
* VB2_USERPTR in currently not enabled: passing a user pointer to
* dma-sg will result in segment sizes that are not a multiple of
* 512 bytes, which is required by the host controller.
*/
.io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF,
.buf_struct_size = sizeof(struct sur40_buffer),
.ops = &sur40_queue_ops,
.mem_ops = &vb2_dma_sg_memops,
.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC,
.min_buffers_needed = 3,
};
static const struct v4l2_file_operations sur40_video_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.release = vb2_fop_release,
.unlocked_ioctl = video_ioctl2,
.read = vb2_fop_read,
.mmap = vb2_fop_mmap,
.poll = vb2_fop_poll,
};
static const struct v4l2_ioctl_ops sur40_video_ioctl_ops = {
.vidioc_querycap = sur40_vidioc_querycap,
.vidioc_enum_fmt_vid_cap = sur40_vidioc_enum_fmt,
.vidioc_try_fmt_vid_cap = sur40_vidioc_try_fmt,
.vidioc_s_fmt_vid_cap = sur40_vidioc_s_fmt,
.vidioc_g_fmt_vid_cap = sur40_vidioc_g_fmt,
.vidioc_enum_framesizes = sur40_vidioc_enum_framesizes,
.vidioc_enum_frameintervals = sur40_vidioc_enum_frameintervals,
.vidioc_g_parm = sur40_ioctl_parm,
.vidioc_s_parm = sur40_ioctl_parm,
.vidioc_enum_input = sur40_vidioc_enum_input,
.vidioc_g_input = sur40_vidioc_g_input,
.vidioc_s_input = sur40_vidioc_s_input,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_expbuf = vb2_ioctl_expbuf,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
};
static const struct video_device sur40_video_device = {
.name = DRIVER_LONG,
.fops = &sur40_video_fops,
.ioctl_ops = &sur40_video_ioctl_ops,
.release = video_device_release_empty,
.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH |
V4L2_CAP_READWRITE | V4L2_CAP_STREAMING,
};
/* USB-specific object needed to register this driver with the USB subsystem. */
static struct usb_driver sur40_driver = {
.name = DRIVER_SHORT,
.probe = sur40_probe,
.disconnect = sur40_disconnect,
.id_table = sur40_table,
};
module_usb_driver(sur40_driver);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/sur40.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* wm9713.c -- Codec touch driver for Wolfson WM9713 AC97 Codec.
*
* Copyright 2003, 2004, 2005, 2006, 2007, 2008 Wolfson Microelectronics PLC.
* Author: Liam Girdwood <[email protected]>
* Parts Copyright : Ian Molton <[email protected]>
* Andrew Zabolotny <[email protected]>
* Russell King <[email protected]>
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/bitops.h>
#include <linux/wm97xx.h>
#define TS_NAME "wm97xx"
#define WM9713_VERSION "1.00"
#define DEFAULT_PRESSURE 0xb0c0
/*
* Module parameters
*/
/*
* Set internal pull up for pen detect.
*
* Pull up is in the range 1.02k (least sensitive) to 64k (most sensitive)
* i.e. pull up resistance = 64k Ohms / rpu.
*
* Adjust this value if you are having problems with pen detect not
* detecting any down event.
*/
static int rpu = 8;
module_param(rpu, int, 0);
MODULE_PARM_DESC(rpu, "Set internal pull up resistor for pen detect.");
/*
* Set current used for pressure measurement.
*
* Set pil = 2 to use 400uA
* pil = 1 to use 200uA and
* pil = 0 to disable pressure measurement.
*
* This is used to increase the range of values returned by the adc
* when measureing touchpanel pressure.
*/
static int pil;
module_param(pil, int, 0);
MODULE_PARM_DESC(pil, "Set current used for pressure measurement.");
/*
* Set threshold for pressure measurement.
*
* Pen down pressure below threshold is ignored.
*/
static int pressure = DEFAULT_PRESSURE & 0xfff;
module_param(pressure, int, 0);
MODULE_PARM_DESC(pressure, "Set threshold for pressure measurement.");
/*
* Set adc sample delay.
*
* For accurate touchpanel measurements, some settling time may be
* required between the switch matrix applying a voltage across the
* touchpanel plate and the ADC sampling the signal.
*
* This delay can be set by setting delay = n, where n is the array
* position of the delay in the array delay_table below.
* Long delays > 1ms are supported for completeness, but are not
* recommended.
*/
static int delay = 4;
module_param(delay, int, 0);
MODULE_PARM_DESC(delay, "Set adc sample delay.");
/*
* Set five_wire = 1 to use a 5 wire touchscreen.
*
* NOTE: Five wire mode does not allow for readback of pressure.
*/
static int five_wire;
module_param(five_wire, int, 0);
MODULE_PARM_DESC(five_wire, "Set to '1' to use 5-wire touchscreen.");
/*
* Set adc mask function.
*
* Sources of glitch noise, such as signals driving an LCD display, may feed
* through to the touch screen plates and affect measurement accuracy. In
* order to minimise this, a signal may be applied to the MASK pin to delay or
* synchronise the sampling.
*
* 0 = No delay or sync
* 1 = High on pin stops conversions
* 2 = Edge triggered, edge on pin delays conversion by delay param (above)
* 3 = Edge triggered, edge on pin starts conversion after delay param
*/
static int mask;
module_param(mask, int, 0);
MODULE_PARM_DESC(mask, "Set adc mask function.");
/*
* Coordinate Polling Enable.
*
* Set to 1 to enable coordinate polling. e.g. x,y[,p] is sampled together
* for every poll.
*/
static int coord;
module_param(coord, int, 0);
MODULE_PARM_DESC(coord, "Polling coordinate mode");
/*
* ADC sample delay times in uS
*/
static const int delay_table[] = {
21, /* 1 AC97 Link frames */
42, /* 2 */
84, /* 4 */
167, /* 8 */
333, /* 16 */
667, /* 32 */
1000, /* 48 */
1333, /* 64 */
2000, /* 96 */
2667, /* 128 */
3333, /* 160 */
4000, /* 192 */
4667, /* 224 */
5333, /* 256 */
6000, /* 288 */
0 /* No delay, switch matrix always on */
};
/*
* Delay after issuing a POLL command.
*
* The delay is 3 AC97 link frames + the touchpanel settling delay
*/
static inline void poll_delay(int d)
{
udelay(3 * AC97_LINK_FRAME + delay_table[d]);
}
/*
* set up the physical settings of the WM9713
*/
static void wm9713_phy_init(struct wm97xx *wm)
{
u16 dig1 = 0, dig2, dig3;
/* default values */
dig2 = WM97XX_DELAY(4) | WM97XX_SLT(5);
dig3 = WM9712_RPU(1);
/* rpu */
if (rpu) {
dig3 &= 0xffc0;
dig3 |= WM9712_RPU(rpu);
dev_info(wm->dev, "setting pen detect pull-up to %d Ohms\n",
64000 / rpu);
}
/* Five wire panel? */
if (five_wire) {
dig3 |= WM9713_45W;
dev_info(wm->dev, "setting 5-wire touchscreen mode.");
if (pil) {
dev_warn(wm->dev,
"Pressure measurement not supported in 5 "
"wire mode, disabling\n");
pil = 0;
}
}
/* touchpanel pressure */
if (pil == 2) {
dig3 |= WM9712_PIL;
dev_info(wm->dev,
"setting pressure measurement current to 400uA.");
} else if (pil)
dev_info(wm->dev,
"setting pressure measurement current to 200uA.");
if (!pil)
pressure = 0;
/* sample settling delay */
if (delay < 0 || delay > 15) {
dev_info(wm->dev, "supplied delay out of range.");
delay = 4;
dev_info(wm->dev, "setting adc sample delay to %d u Secs.",
delay_table[delay]);
}
dig2 &= 0xff0f;
dig2 |= WM97XX_DELAY(delay);
/* mask */
dig3 |= ((mask & 0x3) << 4);
if (coord)
dig3 |= WM9713_WAIT;
wm->misc = wm97xx_reg_read(wm, 0x5a);
wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1);
wm97xx_reg_write(wm, AC97_WM9713_DIG2, dig2);
wm97xx_reg_write(wm, AC97_WM9713_DIG3, dig3);
wm97xx_reg_write(wm, AC97_GPIO_STICKY, 0x0);
}
static void wm9713_dig_enable(struct wm97xx *wm, int enable)
{
u16 val;
if (enable) {
val = wm97xx_reg_read(wm, AC97_EXTENDED_MID);
wm97xx_reg_write(wm, AC97_EXTENDED_MID, val & 0x7fff);
wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2] |
WM97XX_PRP_DET_DIG);
wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */
} else {
wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2] &
~WM97XX_PRP_DET_DIG);
val = wm97xx_reg_read(wm, AC97_EXTENDED_MID);
wm97xx_reg_write(wm, AC97_EXTENDED_MID, val | 0x8000);
}
}
static void wm9713_dig_restore(struct wm97xx *wm)
{
wm97xx_reg_write(wm, AC97_WM9713_DIG1, wm->dig_save[0]);
wm97xx_reg_write(wm, AC97_WM9713_DIG2, wm->dig_save[1]);
wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig_save[2]);
}
static void wm9713_aux_prepare(struct wm97xx *wm)
{
memcpy(wm->dig_save, wm->dig, sizeof(wm->dig));
wm97xx_reg_write(wm, AC97_WM9713_DIG1, 0);
wm97xx_reg_write(wm, AC97_WM9713_DIG2, 0);
wm97xx_reg_write(wm, AC97_WM9713_DIG3, WM97XX_PRP_DET_DIG);
}
static inline int is_pden(struct wm97xx *wm)
{
return wm->dig[2] & WM9713_PDEN;
}
/*
* Read a sample from the WM9713 adc in polling mode.
*/
static int wm9713_poll_sample(struct wm97xx *wm, int adcsel, int *sample)
{
u16 dig1;
int timeout = 5 * delay;
bool wants_pen = adcsel & WM97XX_PEN_DOWN;
if (wants_pen && !wm->pen_probably_down) {
u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
if (!(data & WM97XX_PEN_DOWN))
return RC_PENUP;
wm->pen_probably_down = 1;
}
/* set up digitiser */
dig1 = wm97xx_reg_read(wm, AC97_WM9713_DIG1);
dig1 &= ~WM9713_ADCSEL_MASK;
/* WM97XX_ADCSEL_* channels need to be converted to WM9713 format */
dig1 |= 1 << ((adcsel & WM97XX_ADCSEL_MASK) >> 12);
if (wm->mach_ops && wm->mach_ops->pre_sample)
wm->mach_ops->pre_sample(adcsel);
wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1 | WM9713_POLL);
/* wait 3 AC97 time slots + delay for conversion */
poll_delay(delay);
/* wait for POLL to go low */
while ((wm97xx_reg_read(wm, AC97_WM9713_DIG1) & WM9713_POLL) &&
timeout) {
udelay(AC97_LINK_FRAME);
timeout--;
}
if (timeout <= 0) {
/* If PDEN is set, we can get a timeout when pen goes up */
if (is_pden(wm))
wm->pen_probably_down = 0;
else
dev_dbg(wm->dev, "adc sample timeout");
return RC_PENUP;
}
*sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
if (wm->mach_ops && wm->mach_ops->post_sample)
wm->mach_ops->post_sample(adcsel);
/* check we have correct sample */
if ((*sample ^ adcsel) & WM97XX_ADCSEL_MASK) {
dev_dbg(wm->dev, "adc wrong sample, wanted %x got %x",
adcsel & WM97XX_ADCSEL_MASK,
*sample & WM97XX_ADCSEL_MASK);
return RC_PENUP;
}
if (wants_pen && !(*sample & WM97XX_PEN_DOWN)) {
wm->pen_probably_down = 0;
return RC_PENUP;
}
return RC_VALID;
}
/*
* Read a coordinate from the WM9713 adc in polling mode.
*/
static int wm9713_poll_coord(struct wm97xx *wm, struct wm97xx_data *data)
{
u16 dig1;
int timeout = 5 * delay;
if (!wm->pen_probably_down) {
u16 val = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
if (!(val & WM97XX_PEN_DOWN))
return RC_PENUP;
wm->pen_probably_down = 1;
}
/* set up digitiser */
dig1 = wm97xx_reg_read(wm, AC97_WM9713_DIG1);
dig1 &= ~WM9713_ADCSEL_MASK;
if (pil)
dig1 |= WM9713_ADCSEL_PRES;
if (wm->mach_ops && wm->mach_ops->pre_sample)
wm->mach_ops->pre_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y);
wm97xx_reg_write(wm, AC97_WM9713_DIG1,
dig1 | WM9713_POLL | WM9713_COO);
/* wait 3 AC97 time slots + delay for conversion */
poll_delay(delay);
data->x = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
/* wait for POLL to go low */
while ((wm97xx_reg_read(wm, AC97_WM9713_DIG1) & WM9713_POLL)
&& timeout) {
udelay(AC97_LINK_FRAME);
timeout--;
}
if (timeout <= 0) {
/* If PDEN is set, we can get a timeout when pen goes up */
if (is_pden(wm))
wm->pen_probably_down = 0;
else
dev_dbg(wm->dev, "adc sample timeout");
return RC_PENUP;
}
/* read back data */
data->y = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
if (pil)
data->p = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
else
data->p = DEFAULT_PRESSURE;
if (wm->mach_ops && wm->mach_ops->post_sample)
wm->mach_ops->post_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y);
/* check we have correct sample */
if (!(data->x & WM97XX_ADCSEL_X) || !(data->y & WM97XX_ADCSEL_Y))
goto err;
if (pil && !(data->p & WM97XX_ADCSEL_PRES))
goto err;
if (!(data->x & WM97XX_PEN_DOWN) || !(data->y & WM97XX_PEN_DOWN)) {
wm->pen_probably_down = 0;
return RC_PENUP;
}
return RC_VALID;
err:
return 0;
}
/*
* Sample the WM9713 touchscreen in polling mode
*/
static int wm9713_poll_touch(struct wm97xx *wm, struct wm97xx_data *data)
{
int rc;
if (coord) {
rc = wm9713_poll_coord(wm, data);
if (rc != RC_VALID)
return rc;
} else {
rc = wm9713_poll_sample(wm, WM97XX_ADCSEL_X | WM97XX_PEN_DOWN, &data->x);
if (rc != RC_VALID)
return rc;
rc = wm9713_poll_sample(wm, WM97XX_ADCSEL_Y | WM97XX_PEN_DOWN, &data->y);
if (rc != RC_VALID)
return rc;
if (pil) {
rc = wm9713_poll_sample(wm, WM97XX_ADCSEL_PRES | WM97XX_PEN_DOWN,
&data->p);
if (rc != RC_VALID)
return rc;
} else
data->p = DEFAULT_PRESSURE;
}
return RC_VALID;
}
/*
* Enable WM9713 continuous mode, i.e. touch data is streamed across
* an AC97 slot
*/
static int wm9713_acc_enable(struct wm97xx *wm, int enable)
{
u16 dig1, dig2, dig3;
int ret = 0;
dig1 = wm->dig[0];
dig2 = wm->dig[1];
dig3 = wm->dig[2];
if (enable) {
/* continuous mode */
if (wm->mach_ops->acc_startup &&
(ret = wm->mach_ops->acc_startup(wm)) < 0)
return ret;
dig1 &= ~WM9713_ADCSEL_MASK;
dig1 |= WM9713_CTC | WM9713_COO | WM9713_ADCSEL_X |
WM9713_ADCSEL_Y;
if (pil)
dig1 |= WM9713_ADCSEL_PRES;
dig2 &= ~(WM97XX_DELAY_MASK | WM97XX_SLT_MASK |
WM97XX_CM_RATE_MASK);
dig2 |= WM97XX_SLEN | WM97XX_DELAY(delay) |
WM97XX_SLT(wm->acc_slot) | WM97XX_RATE(wm->acc_rate);
dig3 |= WM9713_PDEN;
} else {
dig1 &= ~(WM9713_CTC | WM9713_COO);
dig2 &= ~WM97XX_SLEN;
dig3 &= ~WM9713_PDEN;
if (wm->mach_ops->acc_shutdown)
wm->mach_ops->acc_shutdown(wm);
}
wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1);
wm97xx_reg_write(wm, AC97_WM9713_DIG2, dig2);
wm97xx_reg_write(wm, AC97_WM9713_DIG3, dig3);
return ret;
}
struct wm97xx_codec_drv wm9713_codec = {
.id = WM9713_ID2,
.name = "wm9713",
.poll_sample = wm9713_poll_sample,
.poll_touch = wm9713_poll_touch,
.acc_enable = wm9713_acc_enable,
.phy_init = wm9713_phy_init,
.dig_enable = wm9713_dig_enable,
.dig_restore = wm9713_dig_restore,
.aux_prepare = wm9713_aux_prepare,
};
EXPORT_SYMBOL_GPL(wm9713_codec);
/* Module information */
MODULE_AUTHOR("Liam Girdwood <[email protected]>");
MODULE_DESCRIPTION("WM9713 Touch Screen Driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/wm9713.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Goodix Touchscreen firmware upload support
*
* Copyright (c) 2021 Hans de Goede <[email protected]>
*
* This is a rewrite of gt9xx_update.c from the Allwinner H3 BSP which is:
* Copyright (c) 2010 - 2012 Goodix Technology.
* Author: [email protected]
*/
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/i2c.h>
#include "goodix.h"
#define GOODIX_FW_HEADER_LENGTH sizeof(struct goodix_fw_header)
#define GOODIX_FW_SECTION_LENGTH 0x2000
#define GOODIX_FW_DSP_LENGTH 0x1000
#define GOODIX_FW_UPLOAD_ADDRESS 0xc000
#define GOODIX_CFG_LOC_HAVE_KEY 7
#define GOODIX_CFG_LOC_DRVA_NUM 27
#define GOODIX_CFG_LOC_DRVB_NUM 28
#define GOODIX_CFG_LOC_SENS_NUM 29
struct goodix_fw_header {
u8 hw_info[4];
u8 pid[8];
u8 vid[2];
} __packed;
static u16 goodix_firmware_checksum(const u8 *data, int size)
{
u16 checksum = 0;
int i;
for (i = 0; i < size; i += 2)
checksum += (data[i] << 8) + data[i + 1];
return checksum;
}
static int goodix_firmware_verify(struct device *dev, const struct firmware *fw)
{
const struct goodix_fw_header *fw_header;
size_t expected_size;
const u8 *data;
u16 checksum;
char buf[9];
expected_size = GOODIX_FW_HEADER_LENGTH + 4 * GOODIX_FW_SECTION_LENGTH +
GOODIX_FW_DSP_LENGTH;
if (fw->size != expected_size) {
dev_err(dev, "Firmware has wrong size, expected %zu got %zu\n",
expected_size, fw->size);
return -EINVAL;
}
data = fw->data + GOODIX_FW_HEADER_LENGTH;
checksum = goodix_firmware_checksum(data, 4 * GOODIX_FW_SECTION_LENGTH);
if (checksum) {
dev_err(dev, "Main firmware checksum error\n");
return -EINVAL;
}
data += 4 * GOODIX_FW_SECTION_LENGTH;
checksum = goodix_firmware_checksum(data, GOODIX_FW_DSP_LENGTH);
if (checksum) {
dev_err(dev, "DSP firmware checksum error\n");
return -EINVAL;
}
fw_header = (const struct goodix_fw_header *)fw->data;
dev_info(dev, "Firmware hardware info %02x%02x%02x%02x\n",
fw_header->hw_info[0], fw_header->hw_info[1],
fw_header->hw_info[2], fw_header->hw_info[3]);
/* pid is a 8 byte buffer containing a string, weird I know */
memcpy(buf, fw_header->pid, 8);
buf[8] = 0;
dev_info(dev, "Firmware PID: %s VID: %02x%02x\n", buf,
fw_header->vid[0], fw_header->vid[1]);
return 0;
}
static int goodix_enter_upload_mode(struct i2c_client *client)
{
int tries, error;
u8 val;
tries = 200;
do {
error = goodix_i2c_write_u8(client,
GOODIX_REG_MISCTL_SWRST, 0x0c);
if (error)
return error;
error = goodix_i2c_read(client,
GOODIX_REG_MISCTL_SWRST, &val, 1);
if (error)
return error;
if (val == 0x0c)
break;
} while (--tries);
if (!tries) {
dev_err(&client->dev, "Error could not hold ss51 & dsp\n");
return -EIO;
}
/* DSP_CK and DSP_ALU_CK PowerOn */
error = goodix_i2c_write_u8(client, GOODIX_REG_MISCTL_DSP_CTL, 0x00);
if (error)
return error;
/* Disable watchdog */
error = goodix_i2c_write_u8(client, GOODIX_REG_MISCTL_TMR0_EN, 0x00);
if (error)
return error;
/* Clear cache enable */
error = goodix_i2c_write_u8(client, GOODIX_REG_MISCTL_CACHE_EN, 0x00);
if (error)
return error;
/* Set boot from SRAM */
error = goodix_i2c_write_u8(client, GOODIX_REG_MISCTL_BOOTCTL, 0x02);
if (error)
return error;
/* Software reboot */
error = goodix_i2c_write_u8(client,
GOODIX_REG_MISCTL_CPU_SWRST_PULSE, 0x01);
if (error)
return error;
/* Clear control flag */
error = goodix_i2c_write_u8(client, GOODIX_REG_MISCTL_BOOTCTL, 0x00);
if (error)
return error;
/* Set scramble */
error = goodix_i2c_write_u8(client, GOODIX_REG_MISCTL_BOOT_OPT, 0x00);
if (error)
return error;
/* Enable accessing code */
error = goodix_i2c_write_u8(client, GOODIX_REG_MISCTL_MEM_CD_EN, 0x01);
if (error)
return error;
return 0;
}
static int goodix_start_firmware(struct i2c_client *client)
{
int error;
u8 val;
/* Init software watchdog */
error = goodix_i2c_write_u8(client, GOODIX_REG_SW_WDT, 0xaa);
if (error)
return error;
/* Release SS51 & DSP */
error = goodix_i2c_write_u8(client, GOODIX_REG_MISCTL_SWRST, 0x00);
if (error)
return error;
error = goodix_i2c_read(client, GOODIX_REG_SW_WDT, &val, 1);
if (error)
return error;
/* The value we've written to SW_WDT should have been cleared now */
if (val == 0xaa) {
dev_err(&client->dev, "Error SW_WDT reg not cleared on fw startup\n");
return -EIO;
}
/* Re-init software watchdog */
error = goodix_i2c_write_u8(client, GOODIX_REG_SW_WDT, 0xaa);
if (error)
return error;
return 0;
}
static int goodix_firmware_upload(struct goodix_ts_data *ts)
{
const struct firmware *fw;
char fw_name[64];
const u8 *data;
int error;
snprintf(fw_name, sizeof(fw_name), "goodix/%s", ts->firmware_name);
error = request_firmware(&fw, fw_name, &ts->client->dev);
if (error) {
dev_err(&ts->client->dev, "Firmware request error %d\n", error);
return error;
}
error = goodix_firmware_verify(&ts->client->dev, fw);
if (error)
goto release;
error = goodix_reset_no_int_sync(ts);
if (error)
goto release;
error = goodix_enter_upload_mode(ts->client);
if (error)
goto release;
/* Select SRAM bank 0 and upload section 1 & 2 */
error = goodix_i2c_write_u8(ts->client,
GOODIX_REG_MISCTL_SRAM_BANK, 0x00);
if (error)
goto release;
data = fw->data + GOODIX_FW_HEADER_LENGTH;
error = goodix_i2c_write(ts->client, GOODIX_FW_UPLOAD_ADDRESS,
data, 2 * GOODIX_FW_SECTION_LENGTH);
if (error)
goto release;
/* Select SRAM bank 1 and upload section 3 & 4 */
error = goodix_i2c_write_u8(ts->client,
GOODIX_REG_MISCTL_SRAM_BANK, 0x01);
if (error)
goto release;
data += 2 * GOODIX_FW_SECTION_LENGTH;
error = goodix_i2c_write(ts->client, GOODIX_FW_UPLOAD_ADDRESS,
data, 2 * GOODIX_FW_SECTION_LENGTH);
if (error)
goto release;
/* Select SRAM bank 2 and upload the DSP firmware */
error = goodix_i2c_write_u8(ts->client,
GOODIX_REG_MISCTL_SRAM_BANK, 0x02);
if (error)
goto release;
data += 2 * GOODIX_FW_SECTION_LENGTH;
error = goodix_i2c_write(ts->client, GOODIX_FW_UPLOAD_ADDRESS,
data, GOODIX_FW_DSP_LENGTH);
if (error)
goto release;
error = goodix_start_firmware(ts->client);
if (error)
goto release;
error = goodix_int_sync(ts);
release:
release_firmware(fw);
return error;
}
static int goodix_prepare_bak_ref(struct goodix_ts_data *ts)
{
u8 have_key, driver_num, sensor_num;
if (ts->bak_ref)
return 0; /* Already done */
have_key = (ts->config[GOODIX_CFG_LOC_HAVE_KEY] & 0x01);
driver_num = (ts->config[GOODIX_CFG_LOC_DRVA_NUM] & 0x1f) +
(ts->config[GOODIX_CFG_LOC_DRVB_NUM] & 0x1f);
if (have_key)
driver_num--;
sensor_num = (ts->config[GOODIX_CFG_LOC_SENS_NUM] & 0x0f) +
((ts->config[GOODIX_CFG_LOC_SENS_NUM] >> 4) & 0x0f);
dev_dbg(&ts->client->dev, "Drv %d Sen %d Key %d\n",
driver_num, sensor_num, have_key);
ts->bak_ref_len = (driver_num * (sensor_num - 2) + 2) * 2;
ts->bak_ref = devm_kzalloc(&ts->client->dev,
ts->bak_ref_len, GFP_KERNEL);
if (!ts->bak_ref)
return -ENOMEM;
/*
* The bak_ref array contains the backup of an array of (self/auto)
* calibration related values which the Android version of the driver
* stores on the filesystem so that it can be restored after reboot.
* The mainline kernel never writes directly to the filesystem like
* this, we always start will all the values which give a correction
* factor in approx. the -20 - +20 range (in 2s complement) set to 0.
*
* Note the touchscreen works fine without restoring the reference
* values after a reboot / power-cycle.
*
* The last 2 bytes are a 16 bits unsigned checksum which is expected
* to make the addition al all 16 bit unsigned values in the array add
* up to 1 (rather then the usual 0), so we must set the last byte to 1.
*/
ts->bak_ref[ts->bak_ref_len - 1] = 1;
return 0;
}
static int goodix_send_main_clock(struct goodix_ts_data *ts)
{
u32 main_clk = 54; /* Default main clock */
u8 checksum = 0;
int i;
device_property_read_u32(&ts->client->dev,
"goodix,main-clk", &main_clk);
for (i = 0; i < (GOODIX_MAIN_CLK_LEN - 1); i++) {
ts->main_clk[i] = main_clk;
checksum += main_clk;
}
/* The value of all bytes combines must be 0 */
ts->main_clk[GOODIX_MAIN_CLK_LEN - 1] = 256 - checksum;
return goodix_i2c_write(ts->client, GOODIX_REG_MAIN_CLK,
ts->main_clk, GOODIX_MAIN_CLK_LEN);
}
int goodix_firmware_check(struct goodix_ts_data *ts)
{
device_property_read_string(&ts->client->dev,
"firmware-name", &ts->firmware_name);
if (!ts->firmware_name)
return 0;
if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) {
dev_err(&ts->client->dev, "Error no IRQ-pin access method, cannot upload fw.\n");
return -EINVAL;
}
dev_info(&ts->client->dev, "Touchscreen controller needs fw-upload\n");
ts->load_cfg_from_disk = true;
return goodix_firmware_upload(ts);
}
bool goodix_handle_fw_request(struct goodix_ts_data *ts)
{
int error;
u8 val;
error = goodix_i2c_read(ts->client, GOODIX_REG_REQUEST, &val, 1);
if (error)
return false;
switch (val) {
case GOODIX_RQST_RESPONDED:
/*
* If we read back our own last ack the IRQ was not for
* a request.
*/
return false;
case GOODIX_RQST_CONFIG:
error = goodix_send_cfg(ts, ts->config, ts->chip->config_len);
if (error)
return false;
break;
case GOODIX_RQST_BAK_REF:
error = goodix_prepare_bak_ref(ts);
if (error)
return false;
error = goodix_i2c_write(ts->client, GOODIX_REG_BAK_REF,
ts->bak_ref, ts->bak_ref_len);
if (error)
return false;
break;
case GOODIX_RQST_RESET:
error = goodix_firmware_upload(ts);
if (error)
return false;
break;
case GOODIX_RQST_MAIN_CLOCK:
error = goodix_send_main_clock(ts);
if (error)
return false;
break;
case GOODIX_RQST_UNKNOWN:
case GOODIX_RQST_IDLE:
break;
default:
dev_err_ratelimited(&ts->client->dev, "Unknown Request: 0x%02x\n", val);
}
/* Ack the request */
goodix_i2c_write_u8(ts->client,
GOODIX_REG_REQUEST, GOODIX_RQST_RESPONDED);
return true;
}
void goodix_save_bak_ref(struct goodix_ts_data *ts)
{
int error;
u8 val;
if (!ts->firmware_name)
return;
error = goodix_i2c_read(ts->client, GOODIX_REG_STATUS, &val, 1);
if (error)
return;
if (!(val & 0x80))
return;
error = goodix_i2c_read(ts->client, GOODIX_REG_BAK_REF,
ts->bak_ref, ts->bak_ref_len);
if (error) {
memset(ts->bak_ref, 0, ts->bak_ref_len);
ts->bak_ref[ts->bak_ref_len - 1] = 1;
}
}
|
linux-master
|
drivers/input/touchscreen/goodix_fwupload.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* drivers/input/touchscreen/jornada720_ts.c
*
* Copyright (C) 2007 Kristoffer Ericson <[email protected]>
*
* Copyright (C) 2006 Filip Zyzniewski <[email protected]>
* based on HP Jornada 56x touchscreen driver by Alex Lange <[email protected]>
*
* HP Jornada 710/720/729 Touchscreen Driver
*/
#include <linux/gpio/consumer.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <mach/jornada720.h>
MODULE_AUTHOR("Kristoffer Ericson <[email protected]>");
MODULE_DESCRIPTION("HP Jornada 710/720/728 touchscreen driver");
MODULE_LICENSE("GPL v2");
struct jornada_ts {
struct input_dev *dev;
struct gpio_desc *gpio;
int x_data[4]; /* X sample values */
int y_data[4]; /* Y sample values */
};
static void jornada720_ts_collect_data(struct jornada_ts *jornada_ts)
{
/* 3 low word X samples */
jornada_ts->x_data[0] = jornada_ssp_byte(TXDUMMY);
jornada_ts->x_data[1] = jornada_ssp_byte(TXDUMMY);
jornada_ts->x_data[2] = jornada_ssp_byte(TXDUMMY);
/* 3 low word Y samples */
jornada_ts->y_data[0] = jornada_ssp_byte(TXDUMMY);
jornada_ts->y_data[1] = jornada_ssp_byte(TXDUMMY);
jornada_ts->y_data[2] = jornada_ssp_byte(TXDUMMY);
/* combined x samples bits */
jornada_ts->x_data[3] = jornada_ssp_byte(TXDUMMY);
/* combined y samples bits */
jornada_ts->y_data[3] = jornada_ssp_byte(TXDUMMY);
}
static int jornada720_ts_average(int coords[4])
{
int coord, high_bits = coords[3];
coord = coords[0] | ((high_bits & 0x03) << 8);
coord += coords[1] | ((high_bits & 0x0c) << 6);
coord += coords[2] | ((high_bits & 0x30) << 4);
return coord / 3;
}
static irqreturn_t jornada720_ts_interrupt(int irq, void *dev_id)
{
struct platform_device *pdev = dev_id;
struct jornada_ts *jornada_ts = platform_get_drvdata(pdev);
struct input_dev *input = jornada_ts->dev;
int x, y;
/* If gpio is high then report pen up */
if (gpiod_get_value(jornada_ts->gpio)) {
input_report_key(input, BTN_TOUCH, 0);
input_sync(input);
} else {
jornada_ssp_start();
/* proper reply to request is always TXDUMMY */
if (jornada_ssp_inout(GETTOUCHSAMPLES) == TXDUMMY) {
jornada720_ts_collect_data(jornada_ts);
x = jornada720_ts_average(jornada_ts->x_data);
y = jornada720_ts_average(jornada_ts->y_data);
input_report_key(input, BTN_TOUCH, 1);
input_report_abs(input, ABS_X, x);
input_report_abs(input, ABS_Y, y);
input_sync(input);
}
jornada_ssp_end();
}
return IRQ_HANDLED;
}
static int jornada720_ts_probe(struct platform_device *pdev)
{
struct jornada_ts *jornada_ts;
struct input_dev *input_dev;
int error, irq;
jornada_ts = devm_kzalloc(&pdev->dev, sizeof(*jornada_ts), GFP_KERNEL);
if (!jornada_ts)
return -ENOMEM;
input_dev = devm_input_allocate_device(&pdev->dev);
if (!input_dev)
return -ENOMEM;
platform_set_drvdata(pdev, jornada_ts);
jornada_ts->gpio = devm_gpiod_get(&pdev->dev, "penup", GPIOD_IN);
if (IS_ERR(jornada_ts->gpio))
return PTR_ERR(jornada_ts->gpio);
irq = gpiod_to_irq(jornada_ts->gpio);
if (irq <= 0)
return irq < 0 ? irq : -EINVAL;
jornada_ts->dev = input_dev;
input_dev->name = "HP Jornada 7xx Touchscreen";
input_dev->phys = "jornadats/input0";
input_dev->id.bustype = BUS_HOST;
input_dev->dev.parent = &pdev->dev;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_abs_params(input_dev, ABS_X, 270, 3900, 0, 0);
input_set_abs_params(input_dev, ABS_Y, 180, 3700, 0, 0);
error = devm_request_irq(&pdev->dev, irq, jornada720_ts_interrupt,
IRQF_TRIGGER_RISING,
"HP7XX Touchscreen driver", pdev);
if (error) {
dev_err(&pdev->dev, "HP7XX TS : Unable to acquire irq!\n");
return error;
}
error = input_register_device(jornada_ts->dev);
if (error)
return error;
return 0;
}
/* work with hotplug and coldplug */
MODULE_ALIAS("platform:jornada_ts");
static struct platform_driver jornada720_ts_driver = {
.probe = jornada720_ts_probe,
.driver = {
.name = "jornada_ts",
},
};
module_platform_driver(jornada720_ts_driver);
|
linux-master
|
drivers/input/touchscreen/jornada720_ts.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2016, Jelle van der Waa <[email protected]>
*/
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/regulator/consumer.h>
#include <asm/unaligned.h>
#define ZET6223_MAX_FINGERS 16
#define ZET6223_MAX_PKT_SIZE (3 + 4 * ZET6223_MAX_FINGERS)
#define ZET6223_CMD_INFO 0xB2
#define ZET6223_CMD_INFO_LENGTH 17
#define ZET6223_VALID_PACKET 0x3c
#define ZET6223_POWER_ON_DELAY_MSEC 30
struct zet6223_ts {
struct i2c_client *client;
struct input_dev *input;
struct regulator *vcc;
struct regulator *vio;
struct touchscreen_properties prop;
struct regulator_bulk_data supplies[2];
u16 max_x;
u16 max_y;
u8 fingernum;
};
static int zet6223_start(struct input_dev *dev)
{
struct zet6223_ts *ts = input_get_drvdata(dev);
enable_irq(ts->client->irq);
return 0;
}
static void zet6223_stop(struct input_dev *dev)
{
struct zet6223_ts *ts = input_get_drvdata(dev);
disable_irq(ts->client->irq);
}
static irqreturn_t zet6223_irq(int irq, void *dev_id)
{
struct zet6223_ts *ts = dev_id;
u16 finger_bits;
/*
* First 3 bytes are an identifier, two bytes of finger data.
* X, Y data per finger is 4 bytes.
*/
u8 bufsize = 3 + 4 * ts->fingernum;
u8 buf[ZET6223_MAX_PKT_SIZE];
int i;
int ret;
int error;
ret = i2c_master_recv(ts->client, buf, bufsize);
if (ret != bufsize) {
error = ret < 0 ? ret : -EIO;
dev_err_ratelimited(&ts->client->dev,
"Error reading input data: %d\n", error);
return IRQ_HANDLED;
}
if (buf[0] != ZET6223_VALID_PACKET)
return IRQ_HANDLED;
finger_bits = get_unaligned_be16(buf + 1);
for (i = 0; i < ts->fingernum; i++) {
if (!(finger_bits & BIT(15 - i)))
continue;
input_mt_slot(ts->input, i);
input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true);
input_event(ts->input, EV_ABS, ABS_MT_POSITION_X,
((buf[i + 3] >> 4) << 8) + buf[i + 4]);
input_event(ts->input, EV_ABS, ABS_MT_POSITION_Y,
((buf[i + 3] & 0xF) << 8) + buf[i + 5]);
}
input_mt_sync_frame(ts->input);
input_sync(ts->input);
return IRQ_HANDLED;
}
static void zet6223_power_off(void *_ts)
{
struct zet6223_ts *ts = _ts;
regulator_bulk_disable(ARRAY_SIZE(ts->supplies), ts->supplies);
}
static int zet6223_power_on(struct zet6223_ts *ts)
{
struct device *dev = &ts->client->dev;
int error;
ts->supplies[0].supply = "vio";
ts->supplies[1].supply = "vcc";
error = devm_regulator_bulk_get(dev, ARRAY_SIZE(ts->supplies),
ts->supplies);
if (error)
return error;
error = regulator_bulk_enable(ARRAY_SIZE(ts->supplies), ts->supplies);
if (error)
return error;
msleep(ZET6223_POWER_ON_DELAY_MSEC);
error = devm_add_action_or_reset(dev, zet6223_power_off, ts);
if (error) {
dev_err(dev, "failed to install poweroff action: %d\n", error);
return error;
}
return 0;
}
static int zet6223_query_device(struct zet6223_ts *ts)
{
u8 buf[ZET6223_CMD_INFO_LENGTH];
u8 cmd = ZET6223_CMD_INFO;
int ret;
int error;
ret = i2c_master_send(ts->client, &cmd, sizeof(cmd));
if (ret != sizeof(cmd)) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"touchpanel info cmd failed: %d\n", error);
return error;
}
ret = i2c_master_recv(ts->client, buf, sizeof(buf));
if (ret != sizeof(buf)) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"failed to retrieve touchpanel info: %d\n", error);
return error;
}
ts->fingernum = buf[15] & 0x7F;
if (ts->fingernum > ZET6223_MAX_FINGERS) {
dev_warn(&ts->client->dev,
"touchpanel reports %d fingers, limiting to %d\n",
ts->fingernum, ZET6223_MAX_FINGERS);
ts->fingernum = ZET6223_MAX_FINGERS;
}
ts->max_x = get_unaligned_le16(&buf[8]);
ts->max_y = get_unaligned_le16(&buf[10]);
return 0;
}
static int zet6223_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct zet6223_ts *ts;
struct input_dev *input;
int error;
if (!client->irq) {
dev_err(dev, "no irq specified\n");
return -EINVAL;
}
ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
ts->client = client;
error = zet6223_power_on(ts);
if (error)
return error;
error = zet6223_query_device(ts);
if (error)
return error;
ts->input = input = devm_input_allocate_device(dev);
if (!input)
return -ENOMEM;
input_set_drvdata(input, ts);
input->name = client->name;
input->id.bustype = BUS_I2C;
input->open = zet6223_start;
input->close = zet6223_stop;
input_set_abs_params(input, ABS_MT_POSITION_X, 0, ts->max_x, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0, ts->max_y, 0, 0);
touchscreen_parse_properties(input, true, &ts->prop);
error = input_mt_init_slots(input, ts->fingernum,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
if (error)
return error;
error = devm_request_threaded_irq(dev, client->irq, NULL, zet6223_irq,
IRQF_ONESHOT, client->name, ts);
if (error) {
dev_err(dev, "failed to request irq %d: %d\n",
client->irq, error);
return error;
}
zet6223_stop(input);
error = input_register_device(input);
if (error)
return error;
return 0;
}
static const struct of_device_id zet6223_of_match[] = {
{ .compatible = "zeitec,zet6223" },
{ }
};
MODULE_DEVICE_TABLE(of, zet6223_of_match);
static const struct i2c_device_id zet6223_id[] = {
{ "zet6223", 0},
{ }
};
MODULE_DEVICE_TABLE(i2c, zet6223_id);
static struct i2c_driver zet6223_driver = {
.driver = {
.name = "zet6223",
.of_match_table = zet6223_of_match,
},
.probe = zet6223_probe,
.id_table = zet6223_id
};
module_i2c_driver(zet6223_driver);
MODULE_AUTHOR("Jelle van der Waa <[email protected]>");
MODULE_DESCRIPTION("ZEITEC zet622x I2C touchscreen driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/zet6223.c
|
// SPDX-License-Identifier: GPL-2.0
/*
* ILITEK Touch IC driver for 23XX, 25XX and Lego series
*
* Copyright (C) 2011 ILI Technology Corporation.
* Copyright (C) 2020 Luca Hsu <[email protected]>
* Copyright (C) 2021 Joe Hung <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/errno.h>
#include <linux/acpi.h>
#include <linux/input/touchscreen.h>
#include <asm/unaligned.h>
#define ILITEK_TS_NAME "ilitek_ts"
#define BL_V1_8 0x108
#define BL_V1_7 0x107
#define BL_V1_6 0x106
#define ILITEK_TP_CMD_GET_TP_RES 0x20
#define ILITEK_TP_CMD_GET_SCRN_RES 0x21
#define ILITEK_TP_CMD_SET_IC_SLEEP 0x30
#define ILITEK_TP_CMD_SET_IC_WAKE 0x31
#define ILITEK_TP_CMD_GET_FW_VER 0x40
#define ILITEK_TP_CMD_GET_PRL_VER 0x42
#define ILITEK_TP_CMD_GET_MCU_VER 0x61
#define ILITEK_TP_CMD_GET_IC_MODE 0xC0
#define REPORT_COUNT_ADDRESS 61
#define ILITEK_SUPPORT_MAX_POINT 40
struct ilitek_protocol_info {
u16 ver;
u8 ver_major;
};
struct ilitek_ts_data {
struct i2c_client *client;
struct gpio_desc *reset_gpio;
struct input_dev *input_dev;
struct touchscreen_properties prop;
const struct ilitek_protocol_map *ptl_cb_func;
struct ilitek_protocol_info ptl;
char product_id[30];
u16 mcu_ver;
u8 ic_mode;
u8 firmware_ver[8];
s32 reset_time;
s32 screen_max_x;
s32 screen_max_y;
s32 screen_min_x;
s32 screen_min_y;
s32 max_tp;
};
struct ilitek_protocol_map {
u16 cmd;
const char *name;
int (*func)(struct ilitek_ts_data *ts, u16 cmd, u8 *inbuf, u8 *outbuf);
};
enum ilitek_cmds {
/* common cmds */
GET_PTL_VER = 0,
GET_FW_VER,
GET_SCRN_RES,
GET_TP_RES,
GET_IC_MODE,
GET_MCU_VER,
SET_IC_SLEEP,
SET_IC_WAKE,
/* ALWAYS keep at the end */
MAX_CMD_CNT
};
/* ILITEK I2C R/W APIs */
static int ilitek_i2c_write_and_read(struct ilitek_ts_data *ts,
u8 *cmd, int write_len, int delay,
u8 *data, int read_len)
{
int error;
struct i2c_client *client = ts->client;
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = 0,
.len = write_len,
.buf = cmd,
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = read_len,
.buf = data,
},
};
if (delay == 0 && write_len > 0 && read_len > 0) {
error = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (error < 0)
return error;
} else {
if (write_len > 0) {
error = i2c_transfer(client->adapter, msgs, 1);
if (error < 0)
return error;
}
if (delay > 0)
mdelay(delay);
if (read_len > 0) {
error = i2c_transfer(client->adapter, msgs + 1, 1);
if (error < 0)
return error;
}
}
return 0;
}
/* ILITEK ISR APIs */
static void ilitek_touch_down(struct ilitek_ts_data *ts, unsigned int id,
unsigned int x, unsigned int y)
{
struct input_dev *input = ts->input_dev;
input_mt_slot(input, id);
input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
touchscreen_report_pos(input, &ts->prop, x, y, true);
}
static int ilitek_process_and_report_v6(struct ilitek_ts_data *ts)
{
int error = 0;
u8 buf[512];
int packet_len = 5;
int packet_max_point = 10;
int report_max_point;
int i, count;
struct input_dev *input = ts->input_dev;
struct device *dev = &ts->client->dev;
unsigned int x, y, status, id;
error = ilitek_i2c_write_and_read(ts, NULL, 0, 0, buf, 64);
if (error) {
dev_err(dev, "get touch info failed, err:%d\n", error);
goto err_sync_frame;
}
report_max_point = buf[REPORT_COUNT_ADDRESS];
if (report_max_point > ts->max_tp) {
dev_err(dev, "FW report max point:%d > panel info. max:%d\n",
report_max_point, ts->max_tp);
error = -EINVAL;
goto err_sync_frame;
}
count = DIV_ROUND_UP(report_max_point, packet_max_point);
for (i = 1; i < count; i++) {
error = ilitek_i2c_write_and_read(ts, NULL, 0, 0,
buf + i * 64, 64);
if (error) {
dev_err(dev, "get touch info. failed, cnt:%d, err:%d\n",
count, error);
goto err_sync_frame;
}
}
for (i = 0; i < report_max_point; i++) {
status = buf[i * packet_len + 1] & 0x40;
if (!status)
continue;
id = buf[i * packet_len + 1] & 0x3F;
x = get_unaligned_le16(buf + i * packet_len + 2);
y = get_unaligned_le16(buf + i * packet_len + 4);
if (x > ts->screen_max_x || x < ts->screen_min_x ||
y > ts->screen_max_y || y < ts->screen_min_y) {
dev_warn(dev, "invalid position, X[%d,%u,%d], Y[%d,%u,%d]\n",
ts->screen_min_x, x, ts->screen_max_x,
ts->screen_min_y, y, ts->screen_max_y);
continue;
}
ilitek_touch_down(ts, id, x, y);
}
err_sync_frame:
input_mt_sync_frame(input);
input_sync(input);
return error;
}
/* APIs of cmds for ILITEK Touch IC */
static int api_protocol_set_cmd(struct ilitek_ts_data *ts,
u16 idx, u8 *inbuf, u8 *outbuf)
{
u16 cmd;
int error;
if (idx >= MAX_CMD_CNT)
return -EINVAL;
cmd = ts->ptl_cb_func[idx].cmd;
error = ts->ptl_cb_func[idx].func(ts, cmd, inbuf, outbuf);
if (error)
return error;
return 0;
}
static int api_protocol_get_ptl_ver(struct ilitek_ts_data *ts,
u16 cmd, u8 *inbuf, u8 *outbuf)
{
int error;
u8 buf[64];
buf[0] = cmd;
error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 3);
if (error)
return error;
ts->ptl.ver = get_unaligned_be16(outbuf);
ts->ptl.ver_major = outbuf[0];
return 0;
}
static int api_protocol_get_mcu_ver(struct ilitek_ts_data *ts,
u16 cmd, u8 *inbuf, u8 *outbuf)
{
int error;
u8 buf[64];
buf[0] = cmd;
error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 32);
if (error)
return error;
ts->mcu_ver = get_unaligned_le16(outbuf);
memset(ts->product_id, 0, sizeof(ts->product_id));
memcpy(ts->product_id, outbuf + 6, 26);
return 0;
}
static int api_protocol_get_fw_ver(struct ilitek_ts_data *ts,
u16 cmd, u8 *inbuf, u8 *outbuf)
{
int error;
u8 buf[64];
buf[0] = cmd;
error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 8);
if (error)
return error;
memcpy(ts->firmware_ver, outbuf, 8);
return 0;
}
static int api_protocol_get_scrn_res(struct ilitek_ts_data *ts,
u16 cmd, u8 *inbuf, u8 *outbuf)
{
int error;
u8 buf[64];
buf[0] = cmd;
error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 8);
if (error)
return error;
ts->screen_min_x = get_unaligned_le16(outbuf);
ts->screen_min_y = get_unaligned_le16(outbuf + 2);
ts->screen_max_x = get_unaligned_le16(outbuf + 4);
ts->screen_max_y = get_unaligned_le16(outbuf + 6);
return 0;
}
static int api_protocol_get_tp_res(struct ilitek_ts_data *ts,
u16 cmd, u8 *inbuf, u8 *outbuf)
{
int error;
u8 buf[64];
buf[0] = cmd;
error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 15);
if (error)
return error;
ts->max_tp = outbuf[8];
if (ts->max_tp > ILITEK_SUPPORT_MAX_POINT) {
dev_err(&ts->client->dev, "Invalid MAX_TP:%d from FW\n",
ts->max_tp);
return -EINVAL;
}
return 0;
}
static int api_protocol_get_ic_mode(struct ilitek_ts_data *ts,
u16 cmd, u8 *inbuf, u8 *outbuf)
{
int error;
u8 buf[64];
buf[0] = cmd;
error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 2);
if (error)
return error;
ts->ic_mode = outbuf[0];
return 0;
}
static int api_protocol_set_ic_sleep(struct ilitek_ts_data *ts,
u16 cmd, u8 *inbuf, u8 *outbuf)
{
u8 buf[64];
buf[0] = cmd;
return ilitek_i2c_write_and_read(ts, buf, 1, 0, NULL, 0);
}
static int api_protocol_set_ic_wake(struct ilitek_ts_data *ts,
u16 cmd, u8 *inbuf, u8 *outbuf)
{
u8 buf[64];
buf[0] = cmd;
return ilitek_i2c_write_and_read(ts, buf, 1, 0, NULL, 0);
}
static const struct ilitek_protocol_map ptl_func_map[] = {
/* common cmds */
[GET_PTL_VER] = {
ILITEK_TP_CMD_GET_PRL_VER, "GET_PTL_VER",
api_protocol_get_ptl_ver
},
[GET_FW_VER] = {
ILITEK_TP_CMD_GET_FW_VER, "GET_FW_VER",
api_protocol_get_fw_ver
},
[GET_SCRN_RES] = {
ILITEK_TP_CMD_GET_SCRN_RES, "GET_SCRN_RES",
api_protocol_get_scrn_res
},
[GET_TP_RES] = {
ILITEK_TP_CMD_GET_TP_RES, "GET_TP_RES",
api_protocol_get_tp_res
},
[GET_IC_MODE] = {
ILITEK_TP_CMD_GET_IC_MODE, "GET_IC_MODE",
api_protocol_get_ic_mode
},
[GET_MCU_VER] = {
ILITEK_TP_CMD_GET_MCU_VER, "GET_MOD_VER",
api_protocol_get_mcu_ver
},
[SET_IC_SLEEP] = {
ILITEK_TP_CMD_SET_IC_SLEEP, "SET_IC_SLEEP",
api_protocol_set_ic_sleep
},
[SET_IC_WAKE] = {
ILITEK_TP_CMD_SET_IC_WAKE, "SET_IC_WAKE",
api_protocol_set_ic_wake
},
};
/* Probe APIs */
static void ilitek_reset(struct ilitek_ts_data *ts, int delay)
{
if (ts->reset_gpio) {
gpiod_set_value(ts->reset_gpio, 1);
mdelay(10);
gpiod_set_value(ts->reset_gpio, 0);
mdelay(delay);
}
}
static int ilitek_protocol_init(struct ilitek_ts_data *ts)
{
int error;
u8 outbuf[64];
ts->ptl_cb_func = ptl_func_map;
ts->reset_time = 600;
error = api_protocol_set_cmd(ts, GET_PTL_VER, NULL, outbuf);
if (error)
return error;
/* Protocol v3 is not support currently */
if (ts->ptl.ver_major == 0x3 ||
ts->ptl.ver == BL_V1_6 ||
ts->ptl.ver == BL_V1_7)
return -EINVAL;
return 0;
}
static int ilitek_read_tp_info(struct ilitek_ts_data *ts, bool boot)
{
u8 outbuf[256];
int error;
error = api_protocol_set_cmd(ts, GET_PTL_VER, NULL, outbuf);
if (error)
return error;
error = api_protocol_set_cmd(ts, GET_MCU_VER, NULL, outbuf);
if (error)
return error;
error = api_protocol_set_cmd(ts, GET_FW_VER, NULL, outbuf);
if (error)
return error;
if (boot) {
error = api_protocol_set_cmd(ts, GET_SCRN_RES, NULL,
outbuf);
if (error)
return error;
}
error = api_protocol_set_cmd(ts, GET_TP_RES, NULL, outbuf);
if (error)
return error;
error = api_protocol_set_cmd(ts, GET_IC_MODE, NULL, outbuf);
if (error)
return error;
return 0;
}
static int ilitek_input_dev_init(struct device *dev, struct ilitek_ts_data *ts)
{
int error;
struct input_dev *input;
input = devm_input_allocate_device(dev);
if (!input)
return -ENOMEM;
ts->input_dev = input;
input->name = ILITEK_TS_NAME;
input->id.bustype = BUS_I2C;
__set_bit(INPUT_PROP_DIRECT, input->propbit);
input_set_abs_params(input, ABS_MT_POSITION_X,
ts->screen_min_x, ts->screen_max_x, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y,
ts->screen_min_y, ts->screen_max_y, 0, 0);
touchscreen_parse_properties(input, true, &ts->prop);
error = input_mt_init_slots(input, ts->max_tp,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
if (error) {
dev_err(dev, "initialize MT slots failed, err:%d\n", error);
return error;
}
error = input_register_device(input);
if (error) {
dev_err(dev, "register input device failed, err:%d\n", error);
return error;
}
return 0;
}
static irqreturn_t ilitek_i2c_isr(int irq, void *dev_id)
{
struct ilitek_ts_data *ts = dev_id;
int error;
error = ilitek_process_and_report_v6(ts);
if (error < 0) {
dev_err(&ts->client->dev, "[%s] err:%d\n", __func__, error);
return IRQ_NONE;
}
return IRQ_HANDLED;
}
static ssize_t firmware_version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct ilitek_ts_data *ts = i2c_get_clientdata(client);
return scnprintf(buf, PAGE_SIZE,
"fw version: [%02X%02X.%02X%02X.%02X%02X.%02X%02X]\n",
ts->firmware_ver[0], ts->firmware_ver[1],
ts->firmware_ver[2], ts->firmware_ver[3],
ts->firmware_ver[4], ts->firmware_ver[5],
ts->firmware_ver[6], ts->firmware_ver[7]);
}
static DEVICE_ATTR_RO(firmware_version);
static ssize_t product_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct ilitek_ts_data *ts = i2c_get_clientdata(client);
return scnprintf(buf, PAGE_SIZE, "product id: [%04X], module: [%s]\n",
ts->mcu_ver, ts->product_id);
}
static DEVICE_ATTR_RO(product_id);
static struct attribute *ilitek_sysfs_attrs[] = {
&dev_attr_firmware_version.attr,
&dev_attr_product_id.attr,
NULL
};
static struct attribute_group ilitek_attrs_group = {
.attrs = ilitek_sysfs_attrs,
};
static int ilitek_ts_i2c_probe(struct i2c_client *client)
{
struct ilitek_ts_data *ts;
struct device *dev = &client->dev;
int error;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(dev, "i2c check functionality failed\n");
return -ENXIO;
}
ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
ts->client = client;
i2c_set_clientdata(client, ts);
ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ts->reset_gpio)) {
error = PTR_ERR(ts->reset_gpio);
dev_err(dev, "request gpiod failed: %d", error);
return error;
}
ilitek_reset(ts, 1000);
error = ilitek_protocol_init(ts);
if (error) {
dev_err(dev, "protocol init failed: %d", error);
return error;
}
error = ilitek_read_tp_info(ts, true);
if (error) {
dev_err(dev, "read tp info failed: %d", error);
return error;
}
error = ilitek_input_dev_init(dev, ts);
if (error) {
dev_err(dev, "input dev init failed: %d", error);
return error;
}
error = devm_request_threaded_irq(dev, ts->client->irq,
NULL, ilitek_i2c_isr, IRQF_ONESHOT,
"ilitek_touch_irq", ts);
if (error) {
dev_err(dev, "request threaded irq failed: %d\n", error);
return error;
}
error = devm_device_add_group(dev, &ilitek_attrs_group);
if (error) {
dev_err(dev, "sysfs create group failed: %d\n", error);
return error;
}
return 0;
}
static int ilitek_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ilitek_ts_data *ts = i2c_get_clientdata(client);
int error;
disable_irq(client->irq);
if (!device_may_wakeup(dev)) {
error = api_protocol_set_cmd(ts, SET_IC_SLEEP, NULL, NULL);
if (error)
return error;
}
return 0;
}
static int ilitek_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ilitek_ts_data *ts = i2c_get_clientdata(client);
int error;
if (!device_may_wakeup(dev)) {
error = api_protocol_set_cmd(ts, SET_IC_WAKE, NULL, NULL);
if (error)
return error;
ilitek_reset(ts, ts->reset_time);
}
enable_irq(client->irq);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(ilitek_pm_ops, ilitek_suspend, ilitek_resume);
static const struct i2c_device_id ilitek_ts_i2c_id[] = {
{ ILITEK_TS_NAME, 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, ilitek_ts_i2c_id);
#ifdef CONFIG_ACPI
static const struct acpi_device_id ilitekts_acpi_id[] = {
{ "ILTK0001", 0 },
{ },
};
MODULE_DEVICE_TABLE(acpi, ilitekts_acpi_id);
#endif
#ifdef CONFIG_OF
static const struct of_device_id ilitek_ts_i2c_match[] = {
{.compatible = "ilitek,ili2130",},
{.compatible = "ilitek,ili2131",},
{.compatible = "ilitek,ili2132",},
{.compatible = "ilitek,ili2316",},
{.compatible = "ilitek,ili2322",},
{.compatible = "ilitek,ili2323",},
{.compatible = "ilitek,ili2326",},
{.compatible = "ilitek,ili2520",},
{.compatible = "ilitek,ili2521",},
{ },
};
MODULE_DEVICE_TABLE(of, ilitek_ts_i2c_match);
#endif
static struct i2c_driver ilitek_ts_i2c_driver = {
.driver = {
.name = ILITEK_TS_NAME,
.pm = pm_sleep_ptr(&ilitek_pm_ops),
.of_match_table = of_match_ptr(ilitek_ts_i2c_match),
.acpi_match_table = ACPI_PTR(ilitekts_acpi_id),
},
.probe = ilitek_ts_i2c_probe,
.id_table = ilitek_ts_i2c_id,
};
module_i2c_driver(ilitek_ts_i2c_driver);
MODULE_AUTHOR("ILITEK");
MODULE_DESCRIPTION("ILITEK I2C Touchscreen Driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/ilitek_ts_i2c.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* AD7879/AD7889 touchscreen (SPI bus)
*
* Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc.
*/
#include <linux/input.h> /* BUS_SPI */
#include <linux/pm.h>
#include <linux/spi/spi.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include "ad7879.h"
#define AD7879_DEVID 0x7A /* AD7879/AD7889 */
#define MAX_SPI_FREQ_HZ 5000000
#define AD7879_CMD_MAGIC 0xE0
#define AD7879_CMD_READ BIT(2)
static const struct regmap_config ad7879_spi_regmap_config = {
.reg_bits = 16,
.val_bits = 16,
.max_register = 15,
.read_flag_mask = AD7879_CMD_MAGIC | AD7879_CMD_READ,
.write_flag_mask = AD7879_CMD_MAGIC,
};
static int ad7879_spi_probe(struct spi_device *spi)
{
struct regmap *regmap;
/* don't exceed max specified SPI CLK frequency */
if (spi->max_speed_hz > MAX_SPI_FREQ_HZ) {
dev_err(&spi->dev, "SPI CLK %d Hz?\n", spi->max_speed_hz);
return -EINVAL;
}
regmap = devm_regmap_init_spi(spi, &ad7879_spi_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
return ad7879_probe(&spi->dev, regmap, spi->irq, BUS_SPI, AD7879_DEVID);
}
#ifdef CONFIG_OF
static const struct of_device_id ad7879_spi_dt_ids[] = {
{ .compatible = "adi,ad7879", },
{ }
};
MODULE_DEVICE_TABLE(of, ad7879_spi_dt_ids);
#endif
static struct spi_driver ad7879_spi_driver = {
.driver = {
.name = "ad7879",
.pm = &ad7879_pm_ops,
.of_match_table = of_match_ptr(ad7879_spi_dt_ids),
},
.probe = ad7879_spi_probe,
};
module_spi_driver(ad7879_spi_driver);
MODULE_AUTHOR("Michael Hennerich <[email protected]>");
MODULE_DESCRIPTION("AD7879(-1) touchscreen SPI bus driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("spi:ad7879");
|
linux-master
|
drivers/input/touchscreen/ad7879-spi.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* mcs5000_ts.c - Touchscreen driver for MELFAS MCS-5000 controller
*
* Copyright (C) 2009 Samsung Electronics Co.Ltd
* Author: Joonyoung Shim <[email protected]>
*
* Based on wm97xx-core.c
*/
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/irq.h>
#include <linux/platform_data/mcs.h>
#include <linux/slab.h>
/* Registers */
#define MCS5000_TS_STATUS 0x00
#define STATUS_OFFSET 0
#define STATUS_NO (0 << STATUS_OFFSET)
#define STATUS_INIT (1 << STATUS_OFFSET)
#define STATUS_SENSING (2 << STATUS_OFFSET)
#define STATUS_COORD (3 << STATUS_OFFSET)
#define STATUS_GESTURE (4 << STATUS_OFFSET)
#define ERROR_OFFSET 4
#define ERROR_NO (0 << ERROR_OFFSET)
#define ERROR_POWER_ON_RESET (1 << ERROR_OFFSET)
#define ERROR_INT_RESET (2 << ERROR_OFFSET)
#define ERROR_EXT_RESET (3 << ERROR_OFFSET)
#define ERROR_INVALID_REG_ADDRESS (8 << ERROR_OFFSET)
#define ERROR_INVALID_REG_VALUE (9 << ERROR_OFFSET)
#define MCS5000_TS_OP_MODE 0x01
#define RESET_OFFSET 0
#define RESET_NO (0 << RESET_OFFSET)
#define RESET_EXT_SOFT (1 << RESET_OFFSET)
#define OP_MODE_OFFSET 1
#define OP_MODE_SLEEP (0 << OP_MODE_OFFSET)
#define OP_MODE_ACTIVE (1 << OP_MODE_OFFSET)
#define GESTURE_OFFSET 4
#define GESTURE_DISABLE (0 << GESTURE_OFFSET)
#define GESTURE_ENABLE (1 << GESTURE_OFFSET)
#define PROXIMITY_OFFSET 5
#define PROXIMITY_DISABLE (0 << PROXIMITY_OFFSET)
#define PROXIMITY_ENABLE (1 << PROXIMITY_OFFSET)
#define SCAN_MODE_OFFSET 6
#define SCAN_MODE_INTERRUPT (0 << SCAN_MODE_OFFSET)
#define SCAN_MODE_POLLING (1 << SCAN_MODE_OFFSET)
#define REPORT_RATE_OFFSET 7
#define REPORT_RATE_40 (0 << REPORT_RATE_OFFSET)
#define REPORT_RATE_80 (1 << REPORT_RATE_OFFSET)
#define MCS5000_TS_SENS_CTL 0x02
#define MCS5000_TS_FILTER_CTL 0x03
#define PRI_FILTER_OFFSET 0
#define SEC_FILTER_OFFSET 4
#define MCS5000_TS_X_SIZE_UPPER 0x08
#define MCS5000_TS_X_SIZE_LOWER 0x09
#define MCS5000_TS_Y_SIZE_UPPER 0x0A
#define MCS5000_TS_Y_SIZE_LOWER 0x0B
#define MCS5000_TS_INPUT_INFO 0x10
#define INPUT_TYPE_OFFSET 0
#define INPUT_TYPE_NONTOUCH (0 << INPUT_TYPE_OFFSET)
#define INPUT_TYPE_SINGLE (1 << INPUT_TYPE_OFFSET)
#define INPUT_TYPE_DUAL (2 << INPUT_TYPE_OFFSET)
#define INPUT_TYPE_PALM (3 << INPUT_TYPE_OFFSET)
#define INPUT_TYPE_PROXIMITY (7 << INPUT_TYPE_OFFSET)
#define GESTURE_CODE_OFFSET 3
#define GESTURE_CODE_NO (0 << GESTURE_CODE_OFFSET)
#define MCS5000_TS_X_POS_UPPER 0x11
#define MCS5000_TS_X_POS_LOWER 0x12
#define MCS5000_TS_Y_POS_UPPER 0x13
#define MCS5000_TS_Y_POS_LOWER 0x14
#define MCS5000_TS_Z_POS 0x15
#define MCS5000_TS_WIDTH 0x16
#define MCS5000_TS_GESTURE_VAL 0x17
#define MCS5000_TS_MODULE_REV 0x20
#define MCS5000_TS_FIRMWARE_VER 0x21
/* Touchscreen absolute values */
#define MCS5000_MAX_XC 0x3ff
#define MCS5000_MAX_YC 0x3ff
enum mcs5000_ts_read_offset {
READ_INPUT_INFO,
READ_X_POS_UPPER,
READ_X_POS_LOWER,
READ_Y_POS_UPPER,
READ_Y_POS_LOWER,
READ_BLOCK_SIZE,
};
/* Each client has this additional data */
struct mcs5000_ts_data {
struct i2c_client *client;
struct input_dev *input_dev;
const struct mcs_platform_data *platform_data;
};
static irqreturn_t mcs5000_ts_interrupt(int irq, void *dev_id)
{
struct mcs5000_ts_data *data = dev_id;
struct i2c_client *client = data->client;
u8 buffer[READ_BLOCK_SIZE];
int err;
int x;
int y;
err = i2c_smbus_read_i2c_block_data(client, MCS5000_TS_INPUT_INFO,
READ_BLOCK_SIZE, buffer);
if (err < 0) {
dev_err(&client->dev, "%s, err[%d]\n", __func__, err);
goto out;
}
switch (buffer[READ_INPUT_INFO]) {
case INPUT_TYPE_NONTOUCH:
input_report_key(data->input_dev, BTN_TOUCH, 0);
input_sync(data->input_dev);
break;
case INPUT_TYPE_SINGLE:
x = (buffer[READ_X_POS_UPPER] << 8) | buffer[READ_X_POS_LOWER];
y = (buffer[READ_Y_POS_UPPER] << 8) | buffer[READ_Y_POS_LOWER];
input_report_key(data->input_dev, BTN_TOUCH, 1);
input_report_abs(data->input_dev, ABS_X, x);
input_report_abs(data->input_dev, ABS_Y, y);
input_sync(data->input_dev);
break;
case INPUT_TYPE_DUAL:
/* TODO */
break;
case INPUT_TYPE_PALM:
/* TODO */
break;
case INPUT_TYPE_PROXIMITY:
/* TODO */
break;
default:
dev_err(&client->dev, "Unknown ts input type %d\n",
buffer[READ_INPUT_INFO]);
break;
}
out:
return IRQ_HANDLED;
}
static void mcs5000_ts_phys_init(struct mcs5000_ts_data *data,
const struct mcs_platform_data *platform_data)
{
struct i2c_client *client = data->client;
/* Touch reset & sleep mode */
i2c_smbus_write_byte_data(client, MCS5000_TS_OP_MODE,
RESET_EXT_SOFT | OP_MODE_SLEEP);
/* Touch size */
i2c_smbus_write_byte_data(client, MCS5000_TS_X_SIZE_UPPER,
platform_data->x_size >> 8);
i2c_smbus_write_byte_data(client, MCS5000_TS_X_SIZE_LOWER,
platform_data->x_size & 0xff);
i2c_smbus_write_byte_data(client, MCS5000_TS_Y_SIZE_UPPER,
platform_data->y_size >> 8);
i2c_smbus_write_byte_data(client, MCS5000_TS_Y_SIZE_LOWER,
platform_data->y_size & 0xff);
/* Touch active mode & 80 report rate */
i2c_smbus_write_byte_data(data->client, MCS5000_TS_OP_MODE,
OP_MODE_ACTIVE | REPORT_RATE_80);
}
static int mcs5000_ts_probe(struct i2c_client *client)
{
const struct mcs_platform_data *pdata;
struct mcs5000_ts_data *data;
struct input_dev *input_dev;
int error;
pdata = dev_get_platdata(&client->dev);
if (!pdata)
return -EINVAL;
data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
if (!data) {
dev_err(&client->dev, "Failed to allocate memory\n");
return -ENOMEM;
}
data->client = client;
input_dev = devm_input_allocate_device(&client->dev);
if (!input_dev) {
dev_err(&client->dev, "Failed to allocate input device\n");
return -ENOMEM;
}
input_dev->name = "MELFAS MCS-5000 Touchscreen";
input_dev->id.bustype = BUS_I2C;
input_dev->dev.parent = &client->dev;
__set_bit(EV_ABS, input_dev->evbit);
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(BTN_TOUCH, input_dev->keybit);
input_set_abs_params(input_dev, ABS_X, 0, MCS5000_MAX_XC, 0, 0);
input_set_abs_params(input_dev, ABS_Y, 0, MCS5000_MAX_YC, 0, 0);
data->input_dev = input_dev;
if (pdata->cfg_pin)
pdata->cfg_pin();
error = devm_request_threaded_irq(&client->dev, client->irq,
NULL, mcs5000_ts_interrupt,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"mcs5000_ts", data);
if (error) {
dev_err(&client->dev, "Failed to register interrupt\n");
return error;
}
error = input_register_device(data->input_dev);
if (error) {
dev_err(&client->dev, "Failed to register input device\n");
return error;
}
mcs5000_ts_phys_init(data, pdata);
i2c_set_clientdata(client, data);
return 0;
}
static int mcs5000_ts_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
/* Touch sleep mode */
i2c_smbus_write_byte_data(client, MCS5000_TS_OP_MODE, OP_MODE_SLEEP);
return 0;
}
static int mcs5000_ts_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct mcs5000_ts_data *data = i2c_get_clientdata(client);
const struct mcs_platform_data *pdata = dev_get_platdata(dev);
mcs5000_ts_phys_init(data, pdata);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(mcs5000_ts_pm,
mcs5000_ts_suspend, mcs5000_ts_resume);
static const struct i2c_device_id mcs5000_ts_id[] = {
{ "mcs5000_ts", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, mcs5000_ts_id);
static struct i2c_driver mcs5000_ts_driver = {
.probe = mcs5000_ts_probe,
.driver = {
.name = "mcs5000_ts",
.pm = pm_sleep_ptr(&mcs5000_ts_pm),
},
.id_table = mcs5000_ts_id,
};
module_i2c_driver(mcs5000_ts_driver);
/* Module information */
MODULE_AUTHOR("Joonyoung Shim <[email protected]>");
MODULE_DESCRIPTION("Touchscreen driver for MELFAS MCS-5000 controller");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/mcs5000_ts.c
|
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
/* Register Map */
#define ZINITIX_SWRESET_CMD 0x0000
#define ZINITIX_WAKEUP_CMD 0x0001
#define ZINITIX_IDLE_CMD 0x0004
#define ZINITIX_SLEEP_CMD 0x0005
#define ZINITIX_CLEAR_INT_STATUS_CMD 0x0003
#define ZINITIX_CALIBRATE_CMD 0x0006
#define ZINITIX_SAVE_STATUS_CMD 0x0007
#define ZINITIX_SAVE_CALIBRATION_CMD 0x0008
#define ZINITIX_RECALL_FACTORY_CMD 0x000f
#define ZINITIX_THRESHOLD 0x0020
#define ZINITIX_LARGE_PALM_REJECT_AREA_TH 0x003F
#define ZINITIX_DEBUG_REG 0x0115 /* 0~7 */
#define ZINITIX_TOUCH_MODE 0x0010
#define ZINITIX_CHIP_REVISION 0x0011
#define ZINITIX_FIRMWARE_VERSION 0x0012
#define ZINITIX_USB_DETECT 0x116
#define ZINITIX_MINOR_FW_VERSION 0x0121
#define ZINITIX_VENDOR_ID 0x001C
#define ZINITIX_HW_ID 0x0014
#define ZINITIX_DATA_VERSION_REG 0x0013
#define ZINITIX_SUPPORTED_FINGER_NUM 0x0015
#define ZINITIX_EEPROM_INFO 0x0018
#define ZINITIX_INITIAL_TOUCH_MODE 0x0019
#define ZINITIX_TOTAL_NUMBER_OF_X 0x0060
#define ZINITIX_TOTAL_NUMBER_OF_Y 0x0061
#define ZINITIX_DELAY_RAW_FOR_HOST 0x007f
#define ZINITIX_BUTTON_SUPPORTED_NUM 0x00B0
#define ZINITIX_BUTTON_SENSITIVITY 0x00B2
#define ZINITIX_DUMMY_BUTTON_SENSITIVITY 0X00C8
#define ZINITIX_X_RESOLUTION 0x00C0
#define ZINITIX_Y_RESOLUTION 0x00C1
#define ZINITIX_POINT_STATUS_REG 0x0080
#define ZINITIX_ICON_STATUS_REG 0x00AA
#define ZINITIX_POINT_COORD_REG (ZINITIX_POINT_STATUS_REG + 2)
#define ZINITIX_AFE_FREQUENCY 0x0100
#define ZINITIX_DND_N_COUNT 0x0122
#define ZINITIX_DND_U_COUNT 0x0135
#define ZINITIX_RAWDATA_REG 0x0200
#define ZINITIX_EEPROM_INFO_REG 0x0018
#define ZINITIX_INT_ENABLE_FLAG 0x00f0
#define ZINITIX_PERIODICAL_INTERRUPT_INTERVAL 0x00f1
#define ZINITIX_BTN_WIDTH 0x016d
#define ZINITIX_CHECKSUM_RESULT 0x012c
#define ZINITIX_INIT_FLASH 0x01d0
#define ZINITIX_WRITE_FLASH 0x01d1
#define ZINITIX_READ_FLASH 0x01d2
#define ZINITIX_INTERNAL_FLAG_02 0x011e
#define ZINITIX_INTERNAL_FLAG_03 0x011f
#define ZINITIX_I2C_CHECKSUM_WCNT 0x016a
#define ZINITIX_I2C_CHECKSUM_RESULT 0x016c
/* Interrupt & status register flags */
#define BIT_PT_CNT_CHANGE BIT(0)
#define BIT_DOWN BIT(1)
#define BIT_MOVE BIT(2)
#define BIT_UP BIT(3)
#define BIT_PALM BIT(4)
#define BIT_PALM_REJECT BIT(5)
#define BIT_RESERVED_0 BIT(6)
#define BIT_RESERVED_1 BIT(7)
#define BIT_WEIGHT_CHANGE BIT(8)
#define BIT_PT_NO_CHANGE BIT(9)
#define BIT_REJECT BIT(10)
#define BIT_PT_EXIST BIT(11)
#define BIT_RESERVED_2 BIT(12)
#define BIT_ERROR BIT(13)
#define BIT_DEBUG BIT(14)
#define BIT_ICON_EVENT BIT(15)
#define SUB_BIT_EXIST BIT(0)
#define SUB_BIT_DOWN BIT(1)
#define SUB_BIT_MOVE BIT(2)
#define SUB_BIT_UP BIT(3)
#define SUB_BIT_UPDATE BIT(4)
#define SUB_BIT_WAIT BIT(5)
#define DEFAULT_TOUCH_POINT_MODE 2
#define MAX_SUPPORTED_FINGER_NUM 5
#define CHIP_ON_DELAY 15 // ms
#define FIRMWARE_ON_DELAY 40 // ms
struct point_coord {
__le16 x;
__le16 y;
u8 width;
u8 sub_status;
// currently unused, but needed as padding:
u8 minor_width;
u8 angle;
};
struct touch_event {
__le16 status;
u8 finger_mask;
u8 time_stamp;
struct point_coord point_coord[MAX_SUPPORTED_FINGER_NUM];
};
struct bt541_ts_data {
struct i2c_client *client;
struct input_dev *input_dev;
struct touchscreen_properties prop;
struct regulator_bulk_data supplies[2];
u32 zinitix_mode;
};
static int zinitix_read_data(struct i2c_client *client,
u16 reg, void *values, size_t length)
{
__le16 reg_le = cpu_to_le16(reg);
int ret;
/* A single i2c_transfer() transaction does not work here. */
ret = i2c_master_send(client, (u8 *)®_le, sizeof(reg_le));
if (ret != sizeof(reg_le))
return ret < 0 ? ret : -EIO;
ret = i2c_master_recv(client, (u8 *)values, length);
if (ret != length)
return ret < 0 ? ret : -EIO;
return 0;
}
static int zinitix_write_u16(struct i2c_client *client, u16 reg, u16 value)
{
__le16 packet[2] = {cpu_to_le16(reg), cpu_to_le16(value)};
int ret;
ret = i2c_master_send(client, (u8 *)packet, sizeof(packet));
if (ret != sizeof(packet))
return ret < 0 ? ret : -EIO;
return 0;
}
static int zinitix_write_cmd(struct i2c_client *client, u16 reg)
{
__le16 reg_le = cpu_to_le16(reg);
int ret;
ret = i2c_master_send(client, (u8 *)®_le, sizeof(reg_le));
if (ret != sizeof(reg_le))
return ret < 0 ? ret : -EIO;
return 0;
}
static int zinitix_init_touch(struct bt541_ts_data *bt541)
{
struct i2c_client *client = bt541->client;
int i;
int error;
error = zinitix_write_cmd(client, ZINITIX_SWRESET_CMD);
if (error) {
dev_err(&client->dev, "Failed to write reset command\n");
return error;
}
error = zinitix_write_u16(client, ZINITIX_INT_ENABLE_FLAG, 0x0);
if (error) {
dev_err(&client->dev,
"Failed to reset interrupt enable flag\n");
return error;
}
/* initialize */
error = zinitix_write_u16(client, ZINITIX_X_RESOLUTION,
bt541->prop.max_x);
if (error)
return error;
error = zinitix_write_u16(client, ZINITIX_Y_RESOLUTION,
bt541->prop.max_y);
if (error)
return error;
error = zinitix_write_u16(client, ZINITIX_SUPPORTED_FINGER_NUM,
MAX_SUPPORTED_FINGER_NUM);
if (error)
return error;
error = zinitix_write_u16(client, ZINITIX_INITIAL_TOUCH_MODE,
bt541->zinitix_mode);
if (error)
return error;
error = zinitix_write_u16(client, ZINITIX_TOUCH_MODE,
bt541->zinitix_mode);
if (error)
return error;
error = zinitix_write_u16(client, ZINITIX_INT_ENABLE_FLAG,
BIT_PT_CNT_CHANGE | BIT_DOWN | BIT_MOVE |
BIT_UP);
if (error)
return error;
/* clear queue */
for (i = 0; i < 10; i++) {
zinitix_write_cmd(client, ZINITIX_CLEAR_INT_STATUS_CMD);
udelay(10);
}
return 0;
}
static int zinitix_init_regulators(struct bt541_ts_data *bt541)
{
struct device *dev = &bt541->client->dev;
int error;
/*
* Some older device trees have erroneous names for the regulators,
* so check if "vddo" is present and in that case use these names.
* Else use the proper supply names on the component.
*/
if (of_property_present(dev->of_node, "vddo-supply")) {
bt541->supplies[0].supply = "vdd";
bt541->supplies[1].supply = "vddo";
} else {
/* Else use the proper supply names */
bt541->supplies[0].supply = "vcca";
bt541->supplies[1].supply = "vdd";
}
error = devm_regulator_bulk_get(dev,
ARRAY_SIZE(bt541->supplies),
bt541->supplies);
if (error < 0) {
dev_err(dev, "Failed to get regulators: %d\n", error);
return error;
}
return 0;
}
static int zinitix_send_power_on_sequence(struct bt541_ts_data *bt541)
{
int error;
struct i2c_client *client = bt541->client;
error = zinitix_write_u16(client, 0xc000, 0x0001);
if (error) {
dev_err(&client->dev,
"Failed to send power sequence(vendor cmd enable)\n");
return error;
}
udelay(10);
error = zinitix_write_cmd(client, 0xc004);
if (error) {
dev_err(&client->dev,
"Failed to send power sequence (intn clear)\n");
return error;
}
udelay(10);
error = zinitix_write_u16(client, 0xc002, 0x0001);
if (error) {
dev_err(&client->dev,
"Failed to send power sequence (nvm init)\n");
return error;
}
mdelay(2);
error = zinitix_write_u16(client, 0xc001, 0x0001);
if (error) {
dev_err(&client->dev,
"Failed to send power sequence (program start)\n");
return error;
}
msleep(FIRMWARE_ON_DELAY);
return 0;
}
static void zinitix_report_finger(struct bt541_ts_data *bt541, int slot,
const struct point_coord *p)
{
u16 x, y;
if (unlikely(!(p->sub_status &
(SUB_BIT_UP | SUB_BIT_DOWN | SUB_BIT_MOVE)))) {
dev_dbg(&bt541->client->dev, "unknown finger event %#02x\n",
p->sub_status);
return;
}
x = le16_to_cpu(p->x);
y = le16_to_cpu(p->y);
input_mt_slot(bt541->input_dev, slot);
if (input_mt_report_slot_state(bt541->input_dev, MT_TOOL_FINGER,
!(p->sub_status & SUB_BIT_UP))) {
touchscreen_report_pos(bt541->input_dev,
&bt541->prop, x, y, true);
input_report_abs(bt541->input_dev,
ABS_MT_TOUCH_MAJOR, p->width);
dev_dbg(&bt541->client->dev, "finger %d %s (%u, %u)\n",
slot, p->sub_status & SUB_BIT_DOWN ? "down" : "move",
x, y);
} else {
dev_dbg(&bt541->client->dev, "finger %d up (%u, %u)\n",
slot, x, y);
}
}
static irqreturn_t zinitix_ts_irq_handler(int irq, void *bt541_handler)
{
struct bt541_ts_data *bt541 = bt541_handler;
struct i2c_client *client = bt541->client;
struct touch_event touch_event;
unsigned long finger_mask;
int error;
int i;
memset(&touch_event, 0, sizeof(struct touch_event));
error = zinitix_read_data(bt541->client, ZINITIX_POINT_STATUS_REG,
&touch_event, sizeof(struct touch_event));
if (error) {
dev_err(&client->dev, "Failed to read in touchpoint struct\n");
goto out;
}
finger_mask = touch_event.finger_mask;
for_each_set_bit(i, &finger_mask, MAX_SUPPORTED_FINGER_NUM) {
const struct point_coord *p = &touch_event.point_coord[i];
/* Only process contacts that are actually reported */
if (p->sub_status & SUB_BIT_EXIST)
zinitix_report_finger(bt541, i, p);
}
input_mt_sync_frame(bt541->input_dev);
input_sync(bt541->input_dev);
out:
zinitix_write_cmd(bt541->client, ZINITIX_CLEAR_INT_STATUS_CMD);
return IRQ_HANDLED;
}
static int zinitix_start(struct bt541_ts_data *bt541)
{
int error;
error = regulator_bulk_enable(ARRAY_SIZE(bt541->supplies),
bt541->supplies);
if (error) {
dev_err(&bt541->client->dev,
"Failed to enable regulators: %d\n", error);
return error;
}
msleep(CHIP_ON_DELAY);
error = zinitix_send_power_on_sequence(bt541);
if (error) {
dev_err(&bt541->client->dev,
"Error while sending power-on sequence: %d\n", error);
return error;
}
error = zinitix_init_touch(bt541);
if (error) {
dev_err(&bt541->client->dev,
"Error while configuring touch IC\n");
return error;
}
enable_irq(bt541->client->irq);
return 0;
}
static int zinitix_stop(struct bt541_ts_data *bt541)
{
int error;
disable_irq(bt541->client->irq);
error = regulator_bulk_disable(ARRAY_SIZE(bt541->supplies),
bt541->supplies);
if (error) {
dev_err(&bt541->client->dev,
"Failed to disable regulators: %d\n", error);
return error;
}
return 0;
}
static int zinitix_input_open(struct input_dev *dev)
{
struct bt541_ts_data *bt541 = input_get_drvdata(dev);
return zinitix_start(bt541);
}
static void zinitix_input_close(struct input_dev *dev)
{
struct bt541_ts_data *bt541 = input_get_drvdata(dev);
zinitix_stop(bt541);
}
static int zinitix_init_input_dev(struct bt541_ts_data *bt541)
{
struct input_dev *input_dev;
int error;
input_dev = devm_input_allocate_device(&bt541->client->dev);
if (!input_dev) {
dev_err(&bt541->client->dev,
"Failed to allocate input device.");
return -ENOMEM;
}
input_set_drvdata(input_dev, bt541);
bt541->input_dev = input_dev;
input_dev->name = "Zinitix Capacitive TouchScreen";
input_dev->phys = "input/ts";
input_dev->id.bustype = BUS_I2C;
input_dev->open = zinitix_input_open;
input_dev->close = zinitix_input_close;
input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
input_set_abs_params(input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
touchscreen_parse_properties(input_dev, true, &bt541->prop);
if (!bt541->prop.max_x || !bt541->prop.max_y) {
dev_err(&bt541->client->dev,
"Touchscreen-size-x and/or touchscreen-size-y not set in dts\n");
return -EINVAL;
}
error = input_mt_init_slots(input_dev, MAX_SUPPORTED_FINGER_NUM,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
if (error) {
dev_err(&bt541->client->dev,
"Failed to initialize MT slots: %d", error);
return error;
}
error = input_register_device(input_dev);
if (error) {
dev_err(&bt541->client->dev,
"Failed to register input device: %d", error);
return error;
}
return 0;
}
static int zinitix_ts_probe(struct i2c_client *client)
{
struct bt541_ts_data *bt541;
int error;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev,
"Failed to assert adapter's support for plain I2C.\n");
return -ENXIO;
}
bt541 = devm_kzalloc(&client->dev, sizeof(*bt541), GFP_KERNEL);
if (!bt541)
return -ENOMEM;
bt541->client = client;
i2c_set_clientdata(client, bt541);
error = zinitix_init_regulators(bt541);
if (error) {
dev_err(&client->dev,
"Failed to initialize regulators: %d\n", error);
return error;
}
error = devm_request_threaded_irq(&client->dev, client->irq,
NULL, zinitix_ts_irq_handler,
IRQF_ONESHOT | IRQF_NO_AUTOEN,
client->name, bt541);
if (error) {
dev_err(&client->dev, "Failed to request IRQ: %d\n", error);
return error;
}
error = zinitix_init_input_dev(bt541);
if (error) {
dev_err(&client->dev,
"Failed to initialize input device: %d\n", error);
return error;
}
error = device_property_read_u32(&client->dev, "zinitix,mode",
&bt541->zinitix_mode);
if (error < 0) {
/* fall back to mode 2 */
bt541->zinitix_mode = DEFAULT_TOUCH_POINT_MODE;
}
if (bt541->zinitix_mode != 2) {
/*
* If there are devices that don't support mode 2, support
* for other modes (0, 1) will be needed.
*/
dev_err(&client->dev,
"Malformed zinitix,mode property, must be 2 (supplied: %d)\n",
bt541->zinitix_mode);
return -EINVAL;
}
return 0;
}
static int zinitix_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct bt541_ts_data *bt541 = i2c_get_clientdata(client);
mutex_lock(&bt541->input_dev->mutex);
if (input_device_enabled(bt541->input_dev))
zinitix_stop(bt541);
mutex_unlock(&bt541->input_dev->mutex);
return 0;
}
static int zinitix_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct bt541_ts_data *bt541 = i2c_get_clientdata(client);
int ret = 0;
mutex_lock(&bt541->input_dev->mutex);
if (input_device_enabled(bt541->input_dev))
ret = zinitix_start(bt541);
mutex_unlock(&bt541->input_dev->mutex);
return ret;
}
static DEFINE_SIMPLE_DEV_PM_OPS(zinitix_pm_ops, zinitix_suspend, zinitix_resume);
#ifdef CONFIG_OF
static const struct of_device_id zinitix_of_match[] = {
{ .compatible = "zinitix,bt402" },
{ .compatible = "zinitix,bt403" },
{ .compatible = "zinitix,bt404" },
{ .compatible = "zinitix,bt412" },
{ .compatible = "zinitix,bt413" },
{ .compatible = "zinitix,bt431" },
{ .compatible = "zinitix,bt432" },
{ .compatible = "zinitix,bt531" },
{ .compatible = "zinitix,bt532" },
{ .compatible = "zinitix,bt538" },
{ .compatible = "zinitix,bt541" },
{ .compatible = "zinitix,bt548" },
{ .compatible = "zinitix,bt554" },
{ .compatible = "zinitix,at100" },
{ }
};
MODULE_DEVICE_TABLE(of, zinitix_of_match);
#endif
static struct i2c_driver zinitix_ts_driver = {
.probe = zinitix_ts_probe,
.driver = {
.name = "Zinitix-TS",
.pm = pm_sleep_ptr(&zinitix_pm_ops),
.of_match_table = of_match_ptr(zinitix_of_match),
},
};
module_i2c_driver(zinitix_ts_driver);
MODULE_AUTHOR("Michael Srba <[email protected]>");
MODULE_DESCRIPTION("Zinitix touchscreen driver");
MODULE_LICENSE("GPL v2");
|
linux-master
|
drivers/input/touchscreen/zinitix.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for MAXI MAX11801 - A Resistive touch screen controller with
* i2c interface
*
* Copyright (C) 2011 Freescale Semiconductor, Inc.
* Author: Zhang Jiejing <[email protected]>
*
* Based on mcs5000_ts.c
*/
/*
* This driver aims to support the series of MAXI touch chips max11801
* through max11803. The main difference between these 4 chips can be
* found in the table below:
* -----------------------------------------------------
* | CHIP | AUTO MODE SUPPORT(FIFO) | INTERFACE |
* |----------------------------------------------------|
* | max11800 | YES | SPI |
* | max11801 | YES | I2C |
* | max11802 | NO | SPI |
* | max11803 | NO | I2C |
* ------------------------------------------------------
*
* Currently, this driver only supports max11801.
*
* Data Sheet:
* http://www.maxim-ic.com/datasheet/index.mvp/id/5943
*/
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/slab.h>
#include <linux/bitops.h>
/* Register Address define */
#define GENERNAL_STATUS_REG 0x00
#define GENERNAL_CONF_REG 0x01
#define MESURE_RES_CONF_REG 0x02
#define MESURE_AVER_CONF_REG 0x03
#define ADC_SAMPLE_TIME_CONF_REG 0x04
#define PANEL_SETUPTIME_CONF_REG 0x05
#define DELAY_CONVERSION_CONF_REG 0x06
#define TOUCH_DETECT_PULLUP_CONF_REG 0x07
#define AUTO_MODE_TIME_CONF_REG 0x08 /* only for max11800/max11801 */
#define APERTURE_CONF_REG 0x09 /* only for max11800/max11801 */
#define AUX_MESURE_CONF_REG 0x0a
#define OP_MODE_CONF_REG 0x0b
/* FIFO is found only in max11800 and max11801 */
#define FIFO_RD_CMD (0x50 << 1)
#define MAX11801_FIFO_INT (1 << 2)
#define MAX11801_FIFO_OVERFLOW (1 << 3)
#define XY_BUFSIZE 4
#define XY_BUF_OFFSET 4
#define MAX11801_MAX_X 0xfff
#define MAX11801_MAX_Y 0xfff
#define MEASURE_TAG_OFFSET 2
#define MEASURE_TAG_MASK (3 << MEASURE_TAG_OFFSET)
#define EVENT_TAG_OFFSET 0
#define EVENT_TAG_MASK (3 << EVENT_TAG_OFFSET)
#define MEASURE_X_TAG (0 << MEASURE_TAG_OFFSET)
#define MEASURE_Y_TAG (1 << MEASURE_TAG_OFFSET)
/* These are the state of touch event state machine */
enum {
EVENT_INIT,
EVENT_MIDDLE,
EVENT_RELEASE,
EVENT_FIFO_END
};
struct max11801_data {
struct i2c_client *client;
struct input_dev *input_dev;
};
static u8 read_register(struct i2c_client *client, int addr)
{
/* XXX: The chip ignores LSB of register address */
return i2c_smbus_read_byte_data(client, addr << 1);
}
static int max11801_write_reg(struct i2c_client *client, int addr, int data)
{
/* XXX: The chip ignores LSB of register address */
return i2c_smbus_write_byte_data(client, addr << 1, data);
}
static irqreturn_t max11801_ts_interrupt(int irq, void *dev_id)
{
struct max11801_data *data = dev_id;
struct i2c_client *client = data->client;
int status, i, ret;
u8 buf[XY_BUFSIZE];
int x = -1;
int y = -1;
status = read_register(data->client, GENERNAL_STATUS_REG);
if (status & (MAX11801_FIFO_INT | MAX11801_FIFO_OVERFLOW)) {
status = read_register(data->client, GENERNAL_STATUS_REG);
ret = i2c_smbus_read_i2c_block_data(client, FIFO_RD_CMD,
XY_BUFSIZE, buf);
/*
* We should get 4 bytes buffer that contains X,Y
* and event tag
*/
if (ret < XY_BUFSIZE)
goto out;
for (i = 0; i < XY_BUFSIZE; i += XY_BUFSIZE / 2) {
if ((buf[i + 1] & MEASURE_TAG_MASK) == MEASURE_X_TAG)
x = (buf[i] << XY_BUF_OFFSET) +
(buf[i + 1] >> XY_BUF_OFFSET);
else if ((buf[i + 1] & MEASURE_TAG_MASK) == MEASURE_Y_TAG)
y = (buf[i] << XY_BUF_OFFSET) +
(buf[i + 1] >> XY_BUF_OFFSET);
}
if ((buf[1] & EVENT_TAG_MASK) != (buf[3] & EVENT_TAG_MASK))
goto out;
switch (buf[1] & EVENT_TAG_MASK) {
case EVENT_INIT:
case EVENT_MIDDLE:
input_report_abs(data->input_dev, ABS_X, x);
input_report_abs(data->input_dev, ABS_Y, y);
input_event(data->input_dev, EV_KEY, BTN_TOUCH, 1);
input_sync(data->input_dev);
break;
case EVENT_RELEASE:
input_event(data->input_dev, EV_KEY, BTN_TOUCH, 0);
input_sync(data->input_dev);
break;
case EVENT_FIFO_END:
break;
}
}
out:
return IRQ_HANDLED;
}
static void max11801_ts_phy_init(struct max11801_data *data)
{
struct i2c_client *client = data->client;
/* Average X,Y, take 16 samples, average eight media sample */
max11801_write_reg(client, MESURE_AVER_CONF_REG, 0xff);
/* X,Y panel setup time set to 20us */
max11801_write_reg(client, PANEL_SETUPTIME_CONF_REG, 0x11);
/* Rough pullup time (2uS), Fine pullup time (10us) */
max11801_write_reg(client, TOUCH_DETECT_PULLUP_CONF_REG, 0x10);
/* Auto mode init period = 5ms , scan period = 5ms*/
max11801_write_reg(client, AUTO_MODE_TIME_CONF_REG, 0xaa);
/* Aperture X,Y set to +- 4LSB */
max11801_write_reg(client, APERTURE_CONF_REG, 0x33);
/* Enable Power, enable Automode, enable Aperture, enable Average X,Y */
max11801_write_reg(client, OP_MODE_CONF_REG, 0x36);
}
static int max11801_ts_probe(struct i2c_client *client)
{
struct max11801_data *data;
struct input_dev *input_dev;
int error;
data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
input_dev = devm_input_allocate_device(&client->dev);
if (!data || !input_dev) {
dev_err(&client->dev, "Failed to allocate memory\n");
return -ENOMEM;
}
data->client = client;
data->input_dev = input_dev;
input_dev->name = "max11801_ts";
input_dev->id.bustype = BUS_I2C;
input_dev->dev.parent = &client->dev;
__set_bit(EV_ABS, input_dev->evbit);
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(BTN_TOUCH, input_dev->keybit);
input_set_abs_params(input_dev, ABS_X, 0, MAX11801_MAX_X, 0, 0);
input_set_abs_params(input_dev, ABS_Y, 0, MAX11801_MAX_Y, 0, 0);
max11801_ts_phy_init(data);
error = devm_request_threaded_irq(&client->dev, client->irq, NULL,
max11801_ts_interrupt,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"max11801_ts", data);
if (error) {
dev_err(&client->dev, "Failed to register interrupt\n");
return error;
}
error = input_register_device(data->input_dev);
if (error)
return error;
return 0;
}
static const struct i2c_device_id max11801_ts_id[] = {
{"max11801", 0},
{ }
};
MODULE_DEVICE_TABLE(i2c, max11801_ts_id);
static const struct of_device_id max11801_ts_dt_ids[] = {
{ .compatible = "maxim,max11801" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, max11801_ts_dt_ids);
static struct i2c_driver max11801_ts_driver = {
.driver = {
.name = "max11801_ts",
.of_match_table = max11801_ts_dt_ids,
},
.id_table = max11801_ts_id,
.probe = max11801_ts_probe,
};
module_i2c_driver(max11801_ts_driver);
MODULE_AUTHOR("Zhang Jiejing <[email protected]>");
MODULE_DESCRIPTION("Touchscreen driver for MAXI MAX11801 controller");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/max11801_ts.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/* -------------------------------------------------------------------------
* Copyright (C) 2014-2015, Intel Corporation
*
* Derived from:
* gslX68X.c
* Copyright (C) 2010-2015, Shanghai Sileadinc Co.Ltd
*
* -------------------------------------------------------------------------
*/
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/acpi.h>
#include <linux/interrupt.h>
#include <linux/gpio/consumer.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/irq.h>
#include <linux/regulator/consumer.h>
#include <asm/unaligned.h>
#define SILEAD_TS_NAME "silead_ts"
#define SILEAD_REG_RESET 0xE0
#define SILEAD_REG_DATA 0x80
#define SILEAD_REG_TOUCH_NR 0x80
#define SILEAD_REG_POWER 0xBC
#define SILEAD_REG_CLOCK 0xE4
#define SILEAD_REG_STATUS 0xB0
#define SILEAD_REG_ID 0xFC
#define SILEAD_REG_MEM_CHECK 0xB0
#define SILEAD_STATUS_OK 0x5A5A5A5A
#define SILEAD_TS_DATA_LEN 44
#define SILEAD_CLOCK 0x04
#define SILEAD_CMD_RESET 0x88
#define SILEAD_CMD_START 0x00
#define SILEAD_POINT_DATA_LEN 0x04
#define SILEAD_POINT_Y_OFF 0x00
#define SILEAD_POINT_Y_MSB_OFF 0x01
#define SILEAD_POINT_X_OFF 0x02
#define SILEAD_POINT_X_MSB_OFF 0x03
#define SILEAD_EXTRA_DATA_MASK 0xF0
#define SILEAD_CMD_SLEEP_MIN 10000
#define SILEAD_CMD_SLEEP_MAX 20000
#define SILEAD_POWER_SLEEP 20
#define SILEAD_STARTUP_SLEEP 30
#define SILEAD_MAX_FINGERS 10
enum silead_ts_power {
SILEAD_POWER_ON = 1,
SILEAD_POWER_OFF = 0
};
struct silead_ts_data {
struct i2c_client *client;
struct gpio_desc *gpio_power;
struct input_dev *input;
struct input_dev *pen_input;
struct regulator_bulk_data regulators[2];
char fw_name[64];
struct touchscreen_properties prop;
u32 max_fingers;
u32 chip_id;
struct input_mt_pos pos[SILEAD_MAX_FINGERS];
int slots[SILEAD_MAX_FINGERS];
int id[SILEAD_MAX_FINGERS];
u32 efi_fw_min_max[4];
bool efi_fw_min_max_set;
bool pen_supported;
bool pen_down;
u32 pen_x_res;
u32 pen_y_res;
int pen_up_count;
};
struct silead_fw_data {
u32 offset;
u32 val;
};
static void silead_apply_efi_fw_min_max(struct silead_ts_data *data)
{
struct input_absinfo *absinfo_x = &data->input->absinfo[ABS_MT_POSITION_X];
struct input_absinfo *absinfo_y = &data->input->absinfo[ABS_MT_POSITION_Y];
if (!data->efi_fw_min_max_set)
return;
absinfo_x->minimum = data->efi_fw_min_max[0];
absinfo_x->maximum = data->efi_fw_min_max[1];
absinfo_y->minimum = data->efi_fw_min_max[2];
absinfo_y->maximum = data->efi_fw_min_max[3];
if (data->prop.invert_x) {
absinfo_x->maximum -= absinfo_x->minimum;
absinfo_x->minimum = 0;
}
if (data->prop.invert_y) {
absinfo_y->maximum -= absinfo_y->minimum;
absinfo_y->minimum = 0;
}
if (data->prop.swap_x_y) {
swap(absinfo_x->minimum, absinfo_y->minimum);
swap(absinfo_x->maximum, absinfo_y->maximum);
}
}
static int silead_ts_request_input_dev(struct silead_ts_data *data)
{
struct device *dev = &data->client->dev;
int error;
data->input = devm_input_allocate_device(dev);
if (!data->input) {
dev_err(dev,
"Failed to allocate input device\n");
return -ENOMEM;
}
input_set_abs_params(data->input, ABS_MT_POSITION_X, 0, 4095, 0, 0);
input_set_abs_params(data->input, ABS_MT_POSITION_Y, 0, 4095, 0, 0);
touchscreen_parse_properties(data->input, true, &data->prop);
silead_apply_efi_fw_min_max(data);
input_mt_init_slots(data->input, data->max_fingers,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED |
INPUT_MT_TRACK);
if (device_property_read_bool(dev, "silead,home-button"))
input_set_capability(data->input, EV_KEY, KEY_LEFTMETA);
data->input->name = SILEAD_TS_NAME;
data->input->phys = "input/ts";
data->input->id.bustype = BUS_I2C;
error = input_register_device(data->input);
if (error) {
dev_err(dev, "Failed to register input device: %d\n", error);
return error;
}
return 0;
}
static int silead_ts_request_pen_input_dev(struct silead_ts_data *data)
{
struct device *dev = &data->client->dev;
int error;
if (!data->pen_supported)
return 0;
data->pen_input = devm_input_allocate_device(dev);
if (!data->pen_input)
return -ENOMEM;
input_set_abs_params(data->pen_input, ABS_X, 0, 4095, 0, 0);
input_set_abs_params(data->pen_input, ABS_Y, 0, 4095, 0, 0);
input_set_capability(data->pen_input, EV_KEY, BTN_TOUCH);
input_set_capability(data->pen_input, EV_KEY, BTN_TOOL_PEN);
set_bit(INPUT_PROP_DIRECT, data->pen_input->propbit);
touchscreen_parse_properties(data->pen_input, false, &data->prop);
input_abs_set_res(data->pen_input, ABS_X, data->pen_x_res);
input_abs_set_res(data->pen_input, ABS_Y, data->pen_y_res);
data->pen_input->name = SILEAD_TS_NAME " pen";
data->pen_input->phys = "input/pen";
data->input->id.bustype = BUS_I2C;
error = input_register_device(data->pen_input);
if (error) {
dev_err(dev, "Failed to register pen input device: %d\n", error);
return error;
}
return 0;
}
static void silead_ts_set_power(struct i2c_client *client,
enum silead_ts_power state)
{
struct silead_ts_data *data = i2c_get_clientdata(client);
if (data->gpio_power) {
gpiod_set_value_cansleep(data->gpio_power, state);
msleep(SILEAD_POWER_SLEEP);
}
}
static bool silead_ts_handle_pen_data(struct silead_ts_data *data, u8 *buf)
{
u8 *coord = buf + SILEAD_POINT_DATA_LEN;
struct input_mt_pos pos;
if (!data->pen_supported || buf[2] != 0x00 || buf[3] != 0x00)
return false;
if (buf[0] == 0x00 && buf[1] == 0x00 && data->pen_down) {
data->pen_up_count++;
if (data->pen_up_count == 6) {
data->pen_down = false;
goto sync;
}
return true;
}
if (buf[0] == 0x01 && buf[1] == 0x08) {
touchscreen_set_mt_pos(&pos, &data->prop,
get_unaligned_le16(&coord[SILEAD_POINT_X_OFF]) & 0xfff,
get_unaligned_le16(&coord[SILEAD_POINT_Y_OFF]) & 0xfff);
input_report_abs(data->pen_input, ABS_X, pos.x);
input_report_abs(data->pen_input, ABS_Y, pos.y);
data->pen_up_count = 0;
data->pen_down = true;
goto sync;
}
return false;
sync:
input_report_key(data->pen_input, BTN_TOOL_PEN, data->pen_down);
input_report_key(data->pen_input, BTN_TOUCH, data->pen_down);
input_sync(data->pen_input);
return true;
}
static void silead_ts_read_data(struct i2c_client *client)
{
struct silead_ts_data *data = i2c_get_clientdata(client);
struct input_dev *input = data->input;
struct device *dev = &client->dev;
u8 *bufp, buf[SILEAD_TS_DATA_LEN];
int touch_nr, softbutton, error, i;
bool softbutton_pressed = false;
error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_DATA,
SILEAD_TS_DATA_LEN, buf);
if (error < 0) {
dev_err(dev, "Data read error %d\n", error);
return;
}
if (buf[0] > data->max_fingers) {
dev_warn(dev, "More touches reported then supported %d > %d\n",
buf[0], data->max_fingers);
buf[0] = data->max_fingers;
}
if (silead_ts_handle_pen_data(data, buf))
goto sync; /* Pen is down, release all previous touches */
touch_nr = 0;
bufp = buf + SILEAD_POINT_DATA_LEN;
for (i = 0; i < buf[0]; i++, bufp += SILEAD_POINT_DATA_LEN) {
softbutton = (bufp[SILEAD_POINT_Y_MSB_OFF] &
SILEAD_EXTRA_DATA_MASK) >> 4;
if (softbutton) {
/*
* For now only respond to softbutton == 0x01, some
* tablets *without* a capacative button send 0x04
* when crossing the edges of the screen.
*/
if (softbutton == 0x01)
softbutton_pressed = true;
continue;
}
/*
* Bits 4-7 are the touch id, note not all models have
* hardware touch ids so atm we don't use these.
*/
data->id[touch_nr] = (bufp[SILEAD_POINT_X_MSB_OFF] &
SILEAD_EXTRA_DATA_MASK) >> 4;
touchscreen_set_mt_pos(&data->pos[touch_nr], &data->prop,
get_unaligned_le16(&bufp[SILEAD_POINT_X_OFF]) & 0xfff,
get_unaligned_le16(&bufp[SILEAD_POINT_Y_OFF]) & 0xfff);
touch_nr++;
}
input_mt_assign_slots(input, data->slots, data->pos, touch_nr, 0);
for (i = 0; i < touch_nr; i++) {
input_mt_slot(input, data->slots[i]);
input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
input_report_abs(input, ABS_MT_POSITION_X, data->pos[i].x);
input_report_abs(input, ABS_MT_POSITION_Y, data->pos[i].y);
dev_dbg(dev, "x=%d y=%d hw_id=%d sw_id=%d\n", data->pos[i].x,
data->pos[i].y, data->id[i], data->slots[i]);
}
sync:
input_mt_sync_frame(input);
input_report_key(input, KEY_LEFTMETA, softbutton_pressed);
input_sync(input);
}
static int silead_ts_init(struct i2c_client *client)
{
struct silead_ts_data *data = i2c_get_clientdata(client);
int error;
error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET,
SILEAD_CMD_RESET);
if (error)
goto i2c_write_err;
usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
error = i2c_smbus_write_byte_data(client, SILEAD_REG_TOUCH_NR,
data->max_fingers);
if (error)
goto i2c_write_err;
usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
error = i2c_smbus_write_byte_data(client, SILEAD_REG_CLOCK,
SILEAD_CLOCK);
if (error)
goto i2c_write_err;
usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET,
SILEAD_CMD_START);
if (error)
goto i2c_write_err;
usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
return 0;
i2c_write_err:
dev_err(&client->dev, "Registers clear error %d\n", error);
return error;
}
static int silead_ts_reset(struct i2c_client *client)
{
int error;
error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET,
SILEAD_CMD_RESET);
if (error)
goto i2c_write_err;
usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
error = i2c_smbus_write_byte_data(client, SILEAD_REG_CLOCK,
SILEAD_CLOCK);
if (error)
goto i2c_write_err;
usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
error = i2c_smbus_write_byte_data(client, SILEAD_REG_POWER,
SILEAD_CMD_START);
if (error)
goto i2c_write_err;
usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
return 0;
i2c_write_err:
dev_err(&client->dev, "Chip reset error %d\n", error);
return error;
}
static int silead_ts_startup(struct i2c_client *client)
{
int error;
error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET, 0x00);
if (error) {
dev_err(&client->dev, "Startup error %d\n", error);
return error;
}
msleep(SILEAD_STARTUP_SLEEP);
return 0;
}
static int silead_ts_load_fw(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct silead_ts_data *data = i2c_get_clientdata(client);
const struct firmware *fw = NULL;
struct silead_fw_data *fw_data;
unsigned int fw_size, i;
int error;
dev_dbg(dev, "Firmware file name: %s", data->fw_name);
/*
* Unfortunately, at the time of writing this comment, we have been unable to
* get permission from Silead, or from device OEMs, to distribute the necessary
* Silead firmware files in linux-firmware.
*
* On a whole bunch of devices the UEFI BIOS code contains a touchscreen driver,
* which contains an embedded copy of the firmware. The fw-loader code has a
* "platform" fallback mechanism, which together with info on the firmware
* from drivers/platform/x86/touchscreen_dmi.c will use the firmware from the
* UEFI driver when the firmware is missing from /lib/firmware. This makes the
* touchscreen work OOTB without users needing to manually download the firmware.
*
* The firmware bundled with the original Windows/Android is usually newer then
* the firmware in the UEFI driver and it is better calibrated. This better
* calibration can lead to significant differences in the reported min/max
* coordinates.
*
* To deal with this we first try to load the firmware without "platform"
* fallback. If that fails we retry with "platform" fallback and if that
* succeeds we apply an (optional) set of alternative min/max values from the
* "silead,efi-fw-min-max" property.
*/
error = firmware_request_nowarn(&fw, data->fw_name, dev);
if (error) {
error = firmware_request_platform(&fw, data->fw_name, dev);
if (error) {
dev_err(dev, "Firmware request error %d\n", error);
return error;
}
error = device_property_read_u32_array(dev, "silead,efi-fw-min-max",
data->efi_fw_min_max,
ARRAY_SIZE(data->efi_fw_min_max));
if (!error)
data->efi_fw_min_max_set = true;
/* The EFI (platform) embedded fw does not have pen support */
if (data->pen_supported) {
dev_warn(dev, "Warning loading '%s' from filesystem failed, using EFI embedded copy.\n",
data->fw_name);
dev_warn(dev, "Warning pen support is known to be broken in the EFI embedded fw version\n");
data->pen_supported = false;
}
}
fw_size = fw->size / sizeof(*fw_data);
fw_data = (struct silead_fw_data *)fw->data;
for (i = 0; i < fw_size; i++) {
error = i2c_smbus_write_i2c_block_data(client,
fw_data[i].offset,
4,
(u8 *)&fw_data[i].val);
if (error) {
dev_err(dev, "Firmware load error %d\n", error);
break;
}
}
release_firmware(fw);
return error ?: 0;
}
static u32 silead_ts_get_status(struct i2c_client *client)
{
int error;
__le32 status;
error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_STATUS,
sizeof(status), (u8 *)&status);
if (error < 0) {
dev_err(&client->dev, "Status read error %d\n", error);
return error;
}
return le32_to_cpu(status);
}
static int silead_ts_get_id(struct i2c_client *client)
{
struct silead_ts_data *data = i2c_get_clientdata(client);
__le32 chip_id;
int error;
error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_ID,
sizeof(chip_id), (u8 *)&chip_id);
if (error < 0)
return error;
data->chip_id = le32_to_cpu(chip_id);
dev_info(&client->dev, "Silead chip ID: 0x%8X", data->chip_id);
return 0;
}
static int silead_ts_setup(struct i2c_client *client)
{
int error;
u32 status;
/*
* Some buggy BIOS-es bring up the chip in a stuck state where it
* blocks the I2C bus. The following steps are necessary to
* unstuck the chip / bus:
* 1. Turn off the Silead chip.
* 2. Try to do an I2C transfer with the chip, this will fail in
* response to which the I2C-bus-driver will call:
* i2c_recover_bus() which will unstuck the I2C-bus. Note the
* unstuck-ing of the I2C bus only works if we first drop the
* chip off the bus by turning it off.
* 3. Turn the chip back on.
*
* On the x86/ACPI systems were this problem is seen, step 1. and
* 3. require making ACPI calls and dealing with ACPI Power
* Resources. The workaround below runtime-suspends the chip to
* turn it off, leaving it up to the ACPI subsystem to deal with
* this.
*/
if (device_property_read_bool(&client->dev,
"silead,stuck-controller-bug")) {
pm_runtime_set_active(&client->dev);
pm_runtime_enable(&client->dev);
pm_runtime_allow(&client->dev);
pm_runtime_suspend(&client->dev);
dev_warn(&client->dev, FW_BUG "Stuck I2C bus: please ignore the next 'controller timed out' error\n");
silead_ts_get_id(client);
/* The forbid will also resume the device */
pm_runtime_forbid(&client->dev);
pm_runtime_disable(&client->dev);
}
silead_ts_set_power(client, SILEAD_POWER_OFF);
silead_ts_set_power(client, SILEAD_POWER_ON);
error = silead_ts_get_id(client);
if (error) {
dev_err(&client->dev, "Chip ID read error %d\n", error);
return error;
}
error = silead_ts_init(client);
if (error)
return error;
error = silead_ts_reset(client);
if (error)
return error;
error = silead_ts_load_fw(client);
if (error)
return error;
error = silead_ts_startup(client);
if (error)
return error;
status = silead_ts_get_status(client);
if (status != SILEAD_STATUS_OK) {
dev_err(&client->dev,
"Initialization error, status: 0x%X\n", status);
return -ENODEV;
}
return 0;
}
static irqreturn_t silead_ts_threaded_irq_handler(int irq, void *id)
{
struct silead_ts_data *data = id;
struct i2c_client *client = data->client;
silead_ts_read_data(client);
return IRQ_HANDLED;
}
static void silead_ts_read_props(struct i2c_client *client)
{
struct silead_ts_data *data = i2c_get_clientdata(client);
struct device *dev = &client->dev;
const char *str;
int error;
error = device_property_read_u32(dev, "silead,max-fingers",
&data->max_fingers);
if (error) {
dev_dbg(dev, "Max fingers read error %d\n", error);
data->max_fingers = 5; /* Most devices handle up-to 5 fingers */
}
error = device_property_read_string(dev, "firmware-name", &str);
if (!error)
snprintf(data->fw_name, sizeof(data->fw_name),
"silead/%s", str);
else
dev_dbg(dev, "Firmware file name read error. Using default.");
data->pen_supported = device_property_read_bool(dev, "silead,pen-supported");
device_property_read_u32(dev, "silead,pen-resolution-x", &data->pen_x_res);
device_property_read_u32(dev, "silead,pen-resolution-y", &data->pen_y_res);
}
#ifdef CONFIG_ACPI
static int silead_ts_set_default_fw_name(struct silead_ts_data *data,
const struct i2c_device_id *id)
{
const struct acpi_device_id *acpi_id;
struct device *dev = &data->client->dev;
int i;
if (ACPI_HANDLE(dev)) {
acpi_id = acpi_match_device(dev->driver->acpi_match_table, dev);
if (!acpi_id)
return -ENODEV;
snprintf(data->fw_name, sizeof(data->fw_name),
"silead/%s.fw", acpi_id->id);
for (i = 0; i < strlen(data->fw_name); i++)
data->fw_name[i] = tolower(data->fw_name[i]);
} else {
snprintf(data->fw_name, sizeof(data->fw_name),
"silead/%s.fw", id->name);
}
return 0;
}
#else
static int silead_ts_set_default_fw_name(struct silead_ts_data *data,
const struct i2c_device_id *id)
{
snprintf(data->fw_name, sizeof(data->fw_name),
"silead/%s.fw", id->name);
return 0;
}
#endif
static void silead_disable_regulator(void *arg)
{
struct silead_ts_data *data = arg;
regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);
}
static int silead_ts_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct silead_ts_data *data;
struct device *dev = &client->dev;
int error;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_I2C |
I2C_FUNC_SMBUS_READ_I2C_BLOCK |
I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)) {
dev_err(dev, "I2C functionality check failed\n");
return -ENXIO;
}
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(client, data);
data->client = client;
error = silead_ts_set_default_fw_name(data, id);
if (error)
return error;
silead_ts_read_props(client);
/* We must have the IRQ provided by DT or ACPI subsystem */
if (client->irq <= 0)
return -ENODEV;
data->regulators[0].supply = "vddio";
data->regulators[1].supply = "avdd";
error = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->regulators),
data->regulators);
if (error)
return error;
/*
* Enable regulators at probe and disable them at remove, we need
* to keep the chip powered otherwise it forgets its firmware.
*/
error = regulator_bulk_enable(ARRAY_SIZE(data->regulators),
data->regulators);
if (error)
return error;
error = devm_add_action_or_reset(dev, silead_disable_regulator, data);
if (error)
return error;
/* Power GPIO pin */
data->gpio_power = devm_gpiod_get_optional(dev, "power", GPIOD_OUT_LOW);
if (IS_ERR(data->gpio_power))
return dev_err_probe(dev, PTR_ERR(data->gpio_power),
"Shutdown GPIO request failed\n");
error = silead_ts_setup(client);
if (error)
return error;
error = silead_ts_request_input_dev(data);
if (error)
return error;
error = silead_ts_request_pen_input_dev(data);
if (error)
return error;
error = devm_request_threaded_irq(dev, client->irq,
NULL, silead_ts_threaded_irq_handler,
IRQF_ONESHOT, client->name, data);
if (error) {
if (error != -EPROBE_DEFER)
dev_err(dev, "IRQ request failed %d\n", error);
return error;
}
return 0;
}
static int silead_ts_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
disable_irq(client->irq);
silead_ts_set_power(client, SILEAD_POWER_OFF);
return 0;
}
static int silead_ts_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
bool second_try = false;
int error, status;
silead_ts_set_power(client, SILEAD_POWER_ON);
retry:
error = silead_ts_reset(client);
if (error)
return error;
if (second_try) {
error = silead_ts_load_fw(client);
if (error)
return error;
}
error = silead_ts_startup(client);
if (error)
return error;
status = silead_ts_get_status(client);
if (status != SILEAD_STATUS_OK) {
if (!second_try) {
second_try = true;
dev_dbg(dev, "Reloading firmware after unsuccessful resume\n");
goto retry;
}
dev_err(dev, "Resume error, status: 0x%02x\n", status);
return -ENODEV;
}
enable_irq(client->irq);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(silead_ts_pm, silead_ts_suspend, silead_ts_resume);
static const struct i2c_device_id silead_ts_id[] = {
{ "gsl1680", 0 },
{ "gsl1688", 0 },
{ "gsl3670", 0 },
{ "gsl3675", 0 },
{ "gsl3692", 0 },
{ "mssl1680", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, silead_ts_id);
#ifdef CONFIG_ACPI
static const struct acpi_device_id silead_ts_acpi_match[] = {
{ "GSL1680", 0 },
{ "GSL1688", 0 },
{ "GSL3670", 0 },
{ "GSL3675", 0 },
{ "GSL3692", 0 },
{ "MSSL1680", 0 },
{ "MSSL0001", 0 },
{ "MSSL0002", 0 },
{ "MSSL0017", 0 },
{ }
};
MODULE_DEVICE_TABLE(acpi, silead_ts_acpi_match);
#endif
#ifdef CONFIG_OF
static const struct of_device_id silead_ts_of_match[] = {
{ .compatible = "silead,gsl1680" },
{ .compatible = "silead,gsl1688" },
{ .compatible = "silead,gsl3670" },
{ .compatible = "silead,gsl3675" },
{ .compatible = "silead,gsl3692" },
{ },
};
MODULE_DEVICE_TABLE(of, silead_ts_of_match);
#endif
static struct i2c_driver silead_ts_driver = {
.probe = silead_ts_probe,
.id_table = silead_ts_id,
.driver = {
.name = SILEAD_TS_NAME,
.acpi_match_table = ACPI_PTR(silead_ts_acpi_match),
.of_match_table = of_match_ptr(silead_ts_of_match),
.pm = pm_sleep_ptr(&silead_ts_pm),
},
};
module_i2c_driver(silead_ts_driver);
MODULE_AUTHOR("Robert Dolca <[email protected]>");
MODULE_DESCRIPTION("Silead I2C touchscreen driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/silead.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2016 Golden Delicious Comp. GmbH&Co. KG
* Nikolaus Schaller <[email protected]>
*/
#include <linux/i2c.h>
#include <linux/iio/iio.h>
#include "tsc2007.h"
struct tsc2007_iio {
struct tsc2007 *ts;
};
#define TSC2007_CHAN_IIO(_chan, _name, _type, _chan_info) \
{ \
.datasheet_name = _name, \
.type = _type, \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
BIT(_chan_info), \
.indexed = 1, \
.channel = _chan, \
}
static const struct iio_chan_spec tsc2007_iio_channel[] = {
TSC2007_CHAN_IIO(0, "x", IIO_VOLTAGE, IIO_CHAN_INFO_RAW),
TSC2007_CHAN_IIO(1, "y", IIO_VOLTAGE, IIO_CHAN_INFO_RAW),
TSC2007_CHAN_IIO(2, "z1", IIO_VOLTAGE, IIO_CHAN_INFO_RAW),
TSC2007_CHAN_IIO(3, "z2", IIO_VOLTAGE, IIO_CHAN_INFO_RAW),
TSC2007_CHAN_IIO(4, "adc", IIO_VOLTAGE, IIO_CHAN_INFO_RAW),
TSC2007_CHAN_IIO(5, "rt", IIO_VOLTAGE, IIO_CHAN_INFO_RAW), /* Ohms? */
TSC2007_CHAN_IIO(6, "pen", IIO_PRESSURE, IIO_CHAN_INFO_RAW),
TSC2007_CHAN_IIO(7, "temp0", IIO_TEMP, IIO_CHAN_INFO_RAW),
TSC2007_CHAN_IIO(8, "temp1", IIO_TEMP, IIO_CHAN_INFO_RAW),
};
static int tsc2007_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val, int *val2, long mask)
{
struct tsc2007_iio *iio = iio_priv(indio_dev);
struct tsc2007 *tsc = iio->ts;
int adc_chan = chan->channel;
int ret = 0;
if (adc_chan >= ARRAY_SIZE(tsc2007_iio_channel))
return -EINVAL;
if (mask != IIO_CHAN_INFO_RAW)
return -EINVAL;
mutex_lock(&tsc->mlock);
switch (chan->channel) {
case 0:
*val = tsc2007_xfer(tsc, READ_X);
break;
case 1:
*val = tsc2007_xfer(tsc, READ_Y);
break;
case 2:
*val = tsc2007_xfer(tsc, READ_Z1);
break;
case 3:
*val = tsc2007_xfer(tsc, READ_Z2);
break;
case 4:
*val = tsc2007_xfer(tsc, (ADC_ON_12BIT | TSC2007_MEASURE_AUX));
break;
case 5: {
struct ts_event tc;
tc.x = tsc2007_xfer(tsc, READ_X);
tc.z1 = tsc2007_xfer(tsc, READ_Z1);
tc.z2 = tsc2007_xfer(tsc, READ_Z2);
*val = tsc2007_calculate_resistance(tsc, &tc);
break;
}
case 6:
*val = tsc2007_is_pen_down(tsc);
break;
case 7:
*val = tsc2007_xfer(tsc,
(ADC_ON_12BIT | TSC2007_MEASURE_TEMP0));
break;
case 8:
*val = tsc2007_xfer(tsc,
(ADC_ON_12BIT | TSC2007_MEASURE_TEMP1));
break;
}
/* Prepare for next touch reading - power down ADC, enable PENIRQ */
tsc2007_xfer(tsc, PWRDOWN);
mutex_unlock(&tsc->mlock);
ret = IIO_VAL_INT;
return ret;
}
static const struct iio_info tsc2007_iio_info = {
.read_raw = tsc2007_read_raw,
};
int tsc2007_iio_configure(struct tsc2007 *ts)
{
struct iio_dev *indio_dev;
struct tsc2007_iio *iio;
int error;
indio_dev = devm_iio_device_alloc(&ts->client->dev, sizeof(*iio));
if (!indio_dev) {
dev_err(&ts->client->dev, "iio_device_alloc failed\n");
return -ENOMEM;
}
iio = iio_priv(indio_dev);
iio->ts = ts;
indio_dev->name = "tsc2007";
indio_dev->info = &tsc2007_iio_info;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = tsc2007_iio_channel;
indio_dev->num_channels = ARRAY_SIZE(tsc2007_iio_channel);
error = devm_iio_device_register(&ts->client->dev, indio_dev);
if (error) {
dev_err(&ts->client->dev,
"iio_device_register() failed: %d\n", error);
return error;
}
return 0;
}
|
linux-master
|
drivers/input/touchscreen/tsc2007_iio.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Touch Screen driver for SiS 9200 family I2C Touch panels
*
* Copyright (C) 2015 SiS, Inc.
* Copyright (C) 2016 Nextfour Group
*/
#include <linux/crc-itu-t.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/interrupt.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <asm/unaligned.h>
#define SIS_I2C_NAME "sis_i2c_ts"
/*
* The I2C packet format:
* le16 byte count
* u8 Report ID
* <contact data - variable length>
* u8 Number of contacts
* le16 Scan Time (optional)
* le16 CRC
*
* One touch point information consists of 6+ bytes, the order is:
* u8 contact state
* u8 finger id
* le16 x axis
* le16 y axis
* u8 contact width (optional)
* u8 contact height (optional)
* u8 pressure (optional)
*
* Maximum amount of data transmitted in one shot is 64 bytes, if controller
* needs to report more contacts than fit in one packet it will send true
* number of contacts in first packet and 0 as number of contacts in second
* packet.
*/
#define SIS_MAX_PACKET_SIZE 64
#define SIS_PKT_LEN_OFFSET 0
#define SIS_PKT_REPORT_OFFSET 2 /* Report ID/type */
#define SIS_PKT_CONTACT_OFFSET 3 /* First contact */
#define SIS_SCAN_TIME_LEN 2
/* Supported report types */
#define SIS_ALL_IN_ONE_PACKAGE 0x10
#define SIS_PKT_IS_TOUCH(x) (((x) & 0x0f) == 0x01)
#define SIS_PKT_IS_HIDI2C(x) (((x) & 0x0f) == 0x06)
/* Contact properties within report */
#define SIS_PKT_HAS_AREA(x) ((x) & BIT(4))
#define SIS_PKT_HAS_PRESSURE(x) ((x) & BIT(5))
#define SIS_PKT_HAS_SCANTIME(x) ((x) & BIT(6))
/* Contact size */
#define SIS_BASE_LEN_PER_CONTACT 6
#define SIS_AREA_LEN_PER_CONTACT 2
#define SIS_PRESSURE_LEN_PER_CONTACT 1
/* Offsets within contact data */
#define SIS_CONTACT_STATUS_OFFSET 0
#define SIS_CONTACT_ID_OFFSET 1 /* Contact ID */
#define SIS_CONTACT_X_OFFSET 2
#define SIS_CONTACT_Y_OFFSET 4
#define SIS_CONTACT_WIDTH_OFFSET 6
#define SIS_CONTACT_HEIGHT_OFFSET 7
#define SIS_CONTACT_PRESSURE_OFFSET(id) (SIS_PKT_HAS_AREA(id) ? 8 : 6)
/* Individual contact state */
#define SIS_STATUS_UP 0x0
#define SIS_STATUS_DOWN 0x3
/* Touchscreen parameters */
#define SIS_MAX_FINGERS 10
#define SIS_MAX_X 4095
#define SIS_MAX_Y 4095
#define SIS_MAX_PRESSURE 255
/* Resolution diagonal */
#define SIS_AREA_LENGTH_LONGER 5792
/*((SIS_MAX_X^2) + (SIS_MAX_Y^2))^0.5*/
#define SIS_AREA_LENGTH_SHORT 5792
#define SIS_AREA_UNIT (5792 / 32)
struct sis_ts_data {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *attn_gpio;
struct gpio_desc *reset_gpio;
u8 packet[SIS_MAX_PACKET_SIZE];
};
static int sis_read_packet(struct i2c_client *client, u8 *buf,
unsigned int *num_contacts,
unsigned int *contact_size)
{
int count_idx;
int ret;
u16 len;
u16 crc, pkg_crc;
u8 report_id;
ret = i2c_master_recv(client, buf, SIS_MAX_PACKET_SIZE);
if (ret <= 0)
return -EIO;
len = get_unaligned_le16(&buf[SIS_PKT_LEN_OFFSET]);
if (len > SIS_MAX_PACKET_SIZE) {
dev_err(&client->dev,
"%s: invalid packet length (%d vs %d)\n",
__func__, len, SIS_MAX_PACKET_SIZE);
return -E2BIG;
}
if (len < 10)
return -EINVAL;
report_id = buf[SIS_PKT_REPORT_OFFSET];
count_idx = len - 1;
*contact_size = SIS_BASE_LEN_PER_CONTACT;
if (report_id != SIS_ALL_IN_ONE_PACKAGE) {
if (SIS_PKT_IS_TOUCH(report_id)) {
/*
* Calculate CRC ignoring packet length
* in the beginning and CRC transmitted
* at the end of the packet.
*/
crc = crc_itu_t(0, buf + 2, len - 2 - 2);
pkg_crc = get_unaligned_le16(&buf[len - 2]);
if (crc != pkg_crc) {
dev_err(&client->dev,
"%s: CRC Error (%d vs %d)\n",
__func__, crc, pkg_crc);
return -EINVAL;
}
count_idx -= 2;
} else if (!SIS_PKT_IS_HIDI2C(report_id)) {
dev_err(&client->dev,
"%s: invalid packet ID %#02x\n",
__func__, report_id);
return -EINVAL;
}
if (SIS_PKT_HAS_SCANTIME(report_id))
count_idx -= SIS_SCAN_TIME_LEN;
if (SIS_PKT_HAS_AREA(report_id))
*contact_size += SIS_AREA_LEN_PER_CONTACT;
if (SIS_PKT_HAS_PRESSURE(report_id))
*contact_size += SIS_PRESSURE_LEN_PER_CONTACT;
}
*num_contacts = buf[count_idx];
return 0;
}
static int sis_ts_report_contact(struct sis_ts_data *ts, const u8 *data, u8 id)
{
struct input_dev *input = ts->input;
int slot;
u8 status = data[SIS_CONTACT_STATUS_OFFSET];
u8 pressure;
u8 height, width;
u16 x, y;
if (status != SIS_STATUS_DOWN && status != SIS_STATUS_UP) {
dev_err(&ts->client->dev, "Unexpected touch status: %#02x\n",
data[SIS_CONTACT_STATUS_OFFSET]);
return -EINVAL;
}
slot = input_mt_get_slot_by_key(input, data[SIS_CONTACT_ID_OFFSET]);
if (slot < 0)
return -ENOENT;
input_mt_slot(input, slot);
input_mt_report_slot_state(input, MT_TOOL_FINGER,
status == SIS_STATUS_DOWN);
if (status == SIS_STATUS_DOWN) {
pressure = height = width = 1;
if (id != SIS_ALL_IN_ONE_PACKAGE) {
if (SIS_PKT_HAS_AREA(id)) {
width = data[SIS_CONTACT_WIDTH_OFFSET];
height = data[SIS_CONTACT_HEIGHT_OFFSET];
}
if (SIS_PKT_HAS_PRESSURE(id))
pressure =
data[SIS_CONTACT_PRESSURE_OFFSET(id)];
}
x = get_unaligned_le16(&data[SIS_CONTACT_X_OFFSET]);
y = get_unaligned_le16(&data[SIS_CONTACT_Y_OFFSET]);
input_report_abs(input, ABS_MT_TOUCH_MAJOR,
width * SIS_AREA_UNIT);
input_report_abs(input, ABS_MT_TOUCH_MINOR,
height * SIS_AREA_UNIT);
input_report_abs(input, ABS_MT_PRESSURE, pressure);
input_report_abs(input, ABS_MT_POSITION_X, x);
input_report_abs(input, ABS_MT_POSITION_Y, y);
}
return 0;
}
static void sis_ts_handle_packet(struct sis_ts_data *ts)
{
const u8 *contact;
unsigned int num_to_report = 0;
unsigned int num_contacts;
unsigned int num_reported;
unsigned int contact_size;
int error;
u8 report_id;
do {
error = sis_read_packet(ts->client, ts->packet,
&num_contacts, &contact_size);
if (error)
break;
if (num_to_report == 0) {
num_to_report = num_contacts;
} else if (num_contacts != 0) {
dev_err(&ts->client->dev,
"%s: nonzero (%d) point count in tail packet\n",
__func__, num_contacts);
break;
}
report_id = ts->packet[SIS_PKT_REPORT_OFFSET];
contact = &ts->packet[SIS_PKT_CONTACT_OFFSET];
num_reported = 0;
while (num_to_report > 0) {
error = sis_ts_report_contact(ts, contact, report_id);
if (error)
break;
contact += contact_size;
num_to_report--;
num_reported++;
if (report_id != SIS_ALL_IN_ONE_PACKAGE &&
num_reported >= 5) {
/*
* The remainder of contacts is sent
* in the 2nd packet.
*/
break;
}
}
} while (num_to_report > 0);
input_mt_sync_frame(ts->input);
input_sync(ts->input);
}
static irqreturn_t sis_ts_irq_handler(int irq, void *dev_id)
{
struct sis_ts_data *ts = dev_id;
do {
sis_ts_handle_packet(ts);
} while (ts->attn_gpio && gpiod_get_value_cansleep(ts->attn_gpio));
return IRQ_HANDLED;
}
static void sis_ts_reset(struct sis_ts_data *ts)
{
if (ts->reset_gpio) {
/* Get out of reset */
usleep_range(1000, 2000);
gpiod_set_value(ts->reset_gpio, 1);
usleep_range(1000, 2000);
gpiod_set_value(ts->reset_gpio, 0);
msleep(100);
}
}
static int sis_ts_probe(struct i2c_client *client)
{
struct sis_ts_data *ts;
struct input_dev *input;
int error;
ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
ts->client = client;
ts->attn_gpio = devm_gpiod_get_optional(&client->dev,
"attn", GPIOD_IN);
if (IS_ERR(ts->attn_gpio))
return dev_err_probe(&client->dev, PTR_ERR(ts->attn_gpio),
"Failed to get attention GPIO\n");
ts->reset_gpio = devm_gpiod_get_optional(&client->dev,
"reset", GPIOD_OUT_LOW);
if (IS_ERR(ts->reset_gpio))
return dev_err_probe(&client->dev, PTR_ERR(ts->reset_gpio),
"Failed to get reset GPIO\n");
sis_ts_reset(ts);
ts->input = input = devm_input_allocate_device(&client->dev);
if (!input) {
dev_err(&client->dev, "Failed to allocate input device\n");
return -ENOMEM;
}
input->name = "SiS Touchscreen";
input->id.bustype = BUS_I2C;
input_set_abs_params(input, ABS_MT_POSITION_X, 0, SIS_MAX_X, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0, SIS_MAX_Y, 0, 0);
input_set_abs_params(input, ABS_MT_PRESSURE, 0, SIS_MAX_PRESSURE, 0, 0);
input_set_abs_params(input, ABS_MT_TOUCH_MAJOR,
0, SIS_AREA_LENGTH_LONGER, 0, 0);
input_set_abs_params(input, ABS_MT_TOUCH_MINOR,
0, SIS_AREA_LENGTH_SHORT, 0, 0);
error = input_mt_init_slots(input, SIS_MAX_FINGERS, INPUT_MT_DIRECT);
if (error) {
dev_err(&client->dev,
"Failed to initialize MT slots: %d\n", error);
return error;
}
error = devm_request_threaded_irq(&client->dev, client->irq,
NULL, sis_ts_irq_handler,
IRQF_ONESHOT,
client->name, ts);
if (error) {
dev_err(&client->dev, "Failed to request IRQ: %d\n", error);
return error;
}
error = input_register_device(ts->input);
if (error) {
dev_err(&client->dev,
"Failed to register input device: %d\n", error);
return error;
}
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id sis_ts_dt_ids[] = {
{ .compatible = "sis,9200-ts" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, sis_ts_dt_ids);
#endif
static const struct i2c_device_id sis_ts_id[] = {
{ SIS_I2C_NAME, 0 },
{ "9200-ts", 0 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(i2c, sis_ts_id);
static struct i2c_driver sis_ts_driver = {
.driver = {
.name = SIS_I2C_NAME,
.of_match_table = of_match_ptr(sis_ts_dt_ids),
},
.probe = sis_ts_probe,
.id_table = sis_ts_id,
};
module_i2c_driver(sis_ts_driver);
MODULE_DESCRIPTION("SiS 9200 Family Touchscreen Driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Mika Penttilä <[email protected]>");
|
linux-master
|
drivers/input/touchscreen/sis_i2c.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Raydium touchscreen I2C driver.
*
* Copyright (C) 2012-2014, Raydium Semiconductor Corporation.
*
* Raydium reserves the right to make changes without further notice
* to the materials described herein. Raydium does not assume any
* liability arising out of the application described herein.
*
* Contact Raydium Semiconductor Corporation at www.rad-ic.com
*/
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pm_wakeirq.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <asm/unaligned.h>
/* Slave I2C mode */
#define RM_BOOT_BLDR 0x02
#define RM_BOOT_MAIN 0x03
/* I2C bootoloader commands */
#define RM_CMD_BOOT_PAGE_WRT 0x0B /* send bl page write */
#define RM_CMD_BOOT_WRT 0x11 /* send bl write */
#define RM_CMD_BOOT_ACK 0x22 /* send ack*/
#define RM_CMD_BOOT_CHK 0x33 /* send data check */
#define RM_CMD_BOOT_READ 0x44 /* send wait bl data ready*/
#define RM_BOOT_RDY 0xFF /* bl data ready */
#define RM_BOOT_CMD_READHWID 0x0E /* read hwid */
/* I2C main commands */
#define RM_CMD_QUERY_BANK 0x2B
#define RM_CMD_DATA_BANK 0x4D
#define RM_CMD_ENTER_SLEEP 0x4E
#define RM_CMD_BANK_SWITCH 0xAA
#define RM_RESET_MSG_ADDR 0x40000004
#define RM_MAX_READ_SIZE 56
#define RM_PACKET_CRC_SIZE 2
/* Touch relative info */
#define RM_MAX_RETRIES 3
#define RM_RETRY_DELAY_MS 20
#define RM_MAX_TOUCH_NUM 10
#define RM_BOOT_DELAY_MS 100
/* Offsets in contact data */
#define RM_CONTACT_STATE_POS 0
#define RM_CONTACT_X_POS 1
#define RM_CONTACT_Y_POS 3
#define RM_CONTACT_PRESSURE_POS 5
#define RM_CONTACT_WIDTH_X_POS 6
#define RM_CONTACT_WIDTH_Y_POS 7
/* Bootloader relative info */
#define RM_BL_WRT_CMD_SIZE 3 /* bl flash wrt cmd size */
#define RM_BL_WRT_PKG_SIZE 32 /* bl wrt pkg size */
#define RM_BL_WRT_LEN (RM_BL_WRT_PKG_SIZE + RM_BL_WRT_CMD_SIZE)
#define RM_FW_PAGE_SIZE 128
#define RM_MAX_FW_RETRIES 30
#define RM_MAX_FW_SIZE 0xD000
#define RM_POWERON_DELAY_USEC 500
#define RM_RESET_DELAY_MSEC 50
enum raydium_bl_cmd {
BL_HEADER = 0,
BL_PAGE_STR,
BL_PKG_IDX,
BL_DATA_STR,
};
enum raydium_bl_ack {
RAYDIUM_ACK_NULL = 0,
RAYDIUM_WAIT_READY,
RAYDIUM_PATH_READY,
};
enum raydium_boot_mode {
RAYDIUM_TS_MAIN = 0,
RAYDIUM_TS_BLDR,
};
/* Response to RM_CMD_DATA_BANK request */
struct raydium_data_info {
__le32 data_bank_addr;
u8 pkg_size;
u8 tp_info_size;
};
struct raydium_info {
__le32 hw_ver; /*device version */
u8 main_ver;
u8 sub_ver;
__le16 ft_ver; /* test version */
u8 x_num;
u8 y_num;
__le16 x_max;
__le16 y_max;
u8 x_res; /* units/mm */
u8 y_res; /* units/mm */
};
/* struct raydium_data - represents state of Raydium touchscreen device */
struct raydium_data {
struct i2c_client *client;
struct input_dev *input;
struct regulator *avdd;
struct regulator *vccio;
struct gpio_desc *reset_gpio;
struct raydium_info info;
struct mutex sysfs_mutex;
u8 *report_data;
u32 data_bank_addr;
u8 report_size;
u8 contact_size;
u8 pkg_size;
enum raydium_boot_mode boot_mode;
};
/*
* Header to be sent for RM_CMD_BANK_SWITCH command. This is used by
* raydium_i2c_{read|send} below.
*/
struct __packed raydium_bank_switch_header {
u8 cmd;
__be32 be_addr;
};
static int raydium_i2c_xfer(struct i2c_client *client, u32 addr,
struct i2c_msg *xfer, size_t xfer_count)
{
int ret;
/*
* If address is greater than 255, then RM_CMD_BANK_SWITCH needs to be
* sent first. Else, skip the header i.e. xfer[0].
*/
int xfer_start_idx = (addr > 0xff) ? 0 : 1;
xfer_count -= xfer_start_idx;
ret = i2c_transfer(client->adapter, &xfer[xfer_start_idx], xfer_count);
if (likely(ret == xfer_count))
return 0;
return ret < 0 ? ret : -EIO;
}
static int raydium_i2c_send(struct i2c_client *client,
u32 addr, const void *data, size_t len)
{
int tries = 0;
int error;
u8 *tx_buf;
u8 reg_addr = addr & 0xff;
tx_buf = kmalloc(len + 1, GFP_KERNEL);
if (!tx_buf)
return -ENOMEM;
tx_buf[0] = reg_addr;
memcpy(tx_buf + 1, data, len);
do {
struct raydium_bank_switch_header header = {
.cmd = RM_CMD_BANK_SWITCH,
.be_addr = cpu_to_be32(addr),
};
/*
* Perform as a single i2c_transfer transaction to ensure that
* no other I2C transactions are initiated on the bus to any
* other device in between. Initiating transacations to other
* devices after RM_CMD_BANK_SWITCH is sent is known to cause
* issues. This is also why regmap infrastructure cannot be used
* for this driver. Regmap handles page(bank) switch and reads
* as separate i2c_transfer() operations. This can result in
* problems if the Raydium device is on a shared I2C bus.
*/
struct i2c_msg xfer[] = {
{
.addr = client->addr,
.len = sizeof(header),
.buf = (u8 *)&header,
},
{
.addr = client->addr,
.len = len + 1,
.buf = tx_buf,
},
};
error = raydium_i2c_xfer(client, addr, xfer, ARRAY_SIZE(xfer));
if (likely(!error))
goto out;
msleep(RM_RETRY_DELAY_MS);
} while (++tries < RM_MAX_RETRIES);
dev_err(&client->dev, "%s failed: %d\n", __func__, error);
out:
kfree(tx_buf);
return error;
}
static int raydium_i2c_read(struct i2c_client *client,
u32 addr, void *data, size_t len)
{
int error;
while (len) {
u8 reg_addr = addr & 0xff;
struct raydium_bank_switch_header header = {
.cmd = RM_CMD_BANK_SWITCH,
.be_addr = cpu_to_be32(addr),
};
size_t xfer_len = min_t(size_t, len, RM_MAX_READ_SIZE);
/*
* Perform as a single i2c_transfer transaction to ensure that
* no other I2C transactions are initiated on the bus to any
* other device in between. Initiating transacations to other
* devices after RM_CMD_BANK_SWITCH is sent is known to cause
* issues. This is also why regmap infrastructure cannot be used
* for this driver. Regmap handles page(bank) switch and writes
* as separate i2c_transfer() operations. This can result in
* problems if the Raydium device is on a shared I2C bus.
*/
struct i2c_msg xfer[] = {
{
.addr = client->addr,
.len = sizeof(header),
.buf = (u8 *)&header,
},
{
.addr = client->addr,
.len = 1,
.buf = ®_addr,
},
{
.addr = client->addr,
.len = xfer_len,
.buf = data,
.flags = I2C_M_RD,
}
};
error = raydium_i2c_xfer(client, addr, xfer, ARRAY_SIZE(xfer));
if (unlikely(error))
return error;
len -= xfer_len;
data += xfer_len;
addr += xfer_len;
}
return 0;
}
static int raydium_i2c_sw_reset(struct i2c_client *client)
{
const u8 soft_rst_cmd = 0x01;
int error;
error = raydium_i2c_send(client, RM_RESET_MSG_ADDR, &soft_rst_cmd,
sizeof(soft_rst_cmd));
if (error) {
dev_err(&client->dev, "software reset failed: %d\n", error);
return error;
}
msleep(RM_RESET_DELAY_MSEC);
return 0;
}
static int raydium_i2c_query_ts_bootloader_info(struct raydium_data *ts)
{
struct i2c_client *client = ts->client;
static const u8 get_hwid[] = { RM_BOOT_CMD_READHWID,
0x10, 0xc0, 0x01, 0x00, 0x04, 0x00 };
u8 rbuf[5] = { 0 };
u32 hw_ver;
int error;
error = raydium_i2c_send(client, RM_CMD_BOOT_WRT,
get_hwid, sizeof(get_hwid));
if (error) {
dev_err(&client->dev, "WRT HWID command failed: %d\n", error);
return error;
}
error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, rbuf, 1);
if (error) {
dev_err(&client->dev, "Ack HWID command failed: %d\n", error);
return error;
}
error = raydium_i2c_read(client, RM_CMD_BOOT_CHK, rbuf, sizeof(rbuf));
if (error) {
dev_err(&client->dev, "Read HWID command failed: %d (%4ph)\n",
error, rbuf + 1);
hw_ver = 0xffffffffUL;
} else {
hw_ver = get_unaligned_be32(rbuf + 1);
}
ts->info.hw_ver = cpu_to_le32(hw_ver);
ts->info.main_ver = 0xff;
ts->info.sub_ver = 0xff;
return error;
}
static int raydium_i2c_query_ts_info(struct raydium_data *ts)
{
struct i2c_client *client = ts->client;
struct raydium_data_info data_info;
__le32 query_bank_addr;
int error, retry_cnt;
for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) {
error = raydium_i2c_read(client, RM_CMD_DATA_BANK,
&data_info, sizeof(data_info));
if (error)
continue;
/*
* Warn user if we already allocated memory for reports and
* then the size changed (due to firmware update?) and keep
* old size instead.
*/
if (ts->report_data && ts->pkg_size != data_info.pkg_size) {
dev_warn(&client->dev,
"report size changes, was: %d, new: %d\n",
ts->pkg_size, data_info.pkg_size);
} else {
ts->pkg_size = data_info.pkg_size;
ts->report_size = ts->pkg_size - RM_PACKET_CRC_SIZE;
}
ts->contact_size = data_info.tp_info_size;
ts->data_bank_addr = le32_to_cpu(data_info.data_bank_addr);
dev_dbg(&client->dev,
"data_bank_addr: %#08x, report_size: %d, contact_size: %d\n",
ts->data_bank_addr, ts->report_size, ts->contact_size);
error = raydium_i2c_read(client, RM_CMD_QUERY_BANK,
&query_bank_addr,
sizeof(query_bank_addr));
if (error)
continue;
error = raydium_i2c_read(client, le32_to_cpu(query_bank_addr),
&ts->info, sizeof(ts->info));
if (error)
continue;
return 0;
}
dev_err(&client->dev, "failed to query device parameters: %d\n", error);
return error;
}
static int raydium_i2c_check_fw_status(struct raydium_data *ts)
{
struct i2c_client *client = ts->client;
static const u8 bl_ack = 0x62;
static const u8 main_ack = 0x66;
u8 buf[4];
int error;
error = raydium_i2c_read(client, RM_CMD_BOOT_READ, buf, sizeof(buf));
if (!error) {
if (buf[0] == bl_ack)
ts->boot_mode = RAYDIUM_TS_BLDR;
else if (buf[0] == main_ack)
ts->boot_mode = RAYDIUM_TS_MAIN;
return 0;
}
return error;
}
static int raydium_i2c_initialize(struct raydium_data *ts)
{
struct i2c_client *client = ts->client;
int error, retry_cnt;
for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) {
/* Wait for Hello packet */
msleep(RM_BOOT_DELAY_MS);
error = raydium_i2c_check_fw_status(ts);
if (error) {
dev_err(&client->dev,
"failed to read 'hello' packet: %d\n", error);
continue;
}
if (ts->boot_mode == RAYDIUM_TS_BLDR ||
ts->boot_mode == RAYDIUM_TS_MAIN) {
break;
}
}
if (error)
ts->boot_mode = RAYDIUM_TS_BLDR;
if (ts->boot_mode == RAYDIUM_TS_BLDR)
raydium_i2c_query_ts_bootloader_info(ts);
else
raydium_i2c_query_ts_info(ts);
return error;
}
static int raydium_i2c_bl_chk_state(struct i2c_client *client,
enum raydium_bl_ack state)
{
static const u8 ack_ok[] = { 0xFF, 0x39, 0x30, 0x30, 0x54 };
u8 rbuf[sizeof(ack_ok)];
u8 retry;
int error;
for (retry = 0; retry < RM_MAX_FW_RETRIES; retry++) {
switch (state) {
case RAYDIUM_ACK_NULL:
return 0;
case RAYDIUM_WAIT_READY:
error = raydium_i2c_read(client, RM_CMD_BOOT_CHK,
&rbuf[0], 1);
if (!error && rbuf[0] == RM_BOOT_RDY)
return 0;
break;
case RAYDIUM_PATH_READY:
error = raydium_i2c_read(client, RM_CMD_BOOT_CHK,
rbuf, sizeof(rbuf));
if (!error && !memcmp(rbuf, ack_ok, sizeof(ack_ok)))
return 0;
break;
default:
dev_err(&client->dev, "%s: invalid target state %d\n",
__func__, state);
return -EINVAL;
}
msleep(20);
}
return -ETIMEDOUT;
}
static int raydium_i2c_write_object(struct i2c_client *client,
const void *data, size_t len,
enum raydium_bl_ack state)
{
int error;
static const u8 cmd[] = { 0xFF, 0x39 };
error = raydium_i2c_send(client, RM_CMD_BOOT_WRT, data, len);
if (error) {
dev_err(&client->dev, "WRT obj command failed: %d\n",
error);
return error;
}
error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, cmd, sizeof(cmd));
if (error) {
dev_err(&client->dev, "Ack obj command failed: %d\n", error);
return error;
}
error = raydium_i2c_bl_chk_state(client, state);
if (error) {
dev_err(&client->dev, "BL check state failed: %d\n", error);
return error;
}
return 0;
}
static int raydium_i2c_boot_trigger(struct i2c_client *client)
{
static const u8 cmd[7][6] = {
{ 0x08, 0x0C, 0x09, 0x00, 0x50, 0xD7 },
{ 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
{ 0x08, 0x04, 0x09, 0x00, 0x50, 0x00 },
{ 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
{ 0x08, 0x0C, 0x09, 0x00, 0x50, 0x00 },
{ 0x06, 0x01, 0x00, 0x00, 0x00, 0x00 },
{ 0x02, 0xA2, 0x00, 0x00, 0x00, 0x00 },
};
int i;
int error;
for (i = 0; i < 7; i++) {
error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
RAYDIUM_WAIT_READY);
if (error) {
dev_err(&client->dev,
"boot trigger failed at step %d: %d\n",
i, error);
return error;
}
}
return 0;
}
static int raydium_i2c_fw_trigger(struct i2c_client *client)
{
static const u8 cmd[5][11] = {
{ 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0xD7, 0, 0, 0 },
{ 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 },
{ 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 },
{ 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 },
{ 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 },
};
int i;
int error;
for (i = 0; i < 5; i++) {
error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
RAYDIUM_ACK_NULL);
if (error) {
dev_err(&client->dev,
"fw trigger failed at step %d: %d\n",
i, error);
return error;
}
}
return 0;
}
static int raydium_i2c_check_path(struct i2c_client *client)
{
static const u8 cmd[] = { 0x09, 0x00, 0x09, 0x00, 0x50, 0x10, 0x00 };
int error;
error = raydium_i2c_write_object(client, cmd, sizeof(cmd),
RAYDIUM_PATH_READY);
if (error) {
dev_err(&client->dev, "check path command failed: %d\n", error);
return error;
}
return 0;
}
static int raydium_i2c_enter_bl(struct i2c_client *client)
{
static const u8 cal_cmd[] = { 0x00, 0x01, 0x52 };
int error;
error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd),
RAYDIUM_ACK_NULL);
if (error) {
dev_err(&client->dev, "enter bl command failed: %d\n", error);
return error;
}
msleep(RM_BOOT_DELAY_MS);
return 0;
}
static int raydium_i2c_leave_bl(struct i2c_client *client)
{
static const u8 leave_cmd[] = { 0x05, 0x00 };
int error;
error = raydium_i2c_write_object(client, leave_cmd, sizeof(leave_cmd),
RAYDIUM_ACK_NULL);
if (error) {
dev_err(&client->dev, "leave bl command failed: %d\n", error);
return error;
}
msleep(RM_BOOT_DELAY_MS);
return 0;
}
static int raydium_i2c_write_checksum(struct i2c_client *client,
size_t length, u16 checksum)
{
u8 checksum_cmd[] = { 0x00, 0x05, 0x6D, 0x00, 0x00, 0x00, 0x00 };
int error;
put_unaligned_le16(length, &checksum_cmd[3]);
put_unaligned_le16(checksum, &checksum_cmd[5]);
error = raydium_i2c_write_object(client,
checksum_cmd, sizeof(checksum_cmd),
RAYDIUM_ACK_NULL);
if (error) {
dev_err(&client->dev, "failed to write checksum: %d\n",
error);
return error;
}
return 0;
}
static int raydium_i2c_disable_watch_dog(struct i2c_client *client)
{
static const u8 cmd[] = { 0x0A, 0xAA };
int error;
error = raydium_i2c_write_object(client, cmd, sizeof(cmd),
RAYDIUM_WAIT_READY);
if (error) {
dev_err(&client->dev, "disable watchdog command failed: %d\n",
error);
return error;
}
return 0;
}
static int raydium_i2c_fw_write_page(struct i2c_client *client,
u16 page_idx, const void *data, size_t len)
{
u8 buf[RM_BL_WRT_LEN];
size_t xfer_len;
int error;
int i;
BUILD_BUG_ON((RM_FW_PAGE_SIZE % RM_BL_WRT_PKG_SIZE) != 0);
for (i = 0; i < RM_FW_PAGE_SIZE / RM_BL_WRT_PKG_SIZE; i++) {
buf[BL_HEADER] = RM_CMD_BOOT_PAGE_WRT;
buf[BL_PAGE_STR] = page_idx ? 0xff : 0;
buf[BL_PKG_IDX] = i + 1;
xfer_len = min_t(size_t, len, RM_BL_WRT_PKG_SIZE);
memcpy(&buf[BL_DATA_STR], data, xfer_len);
if (len < RM_BL_WRT_PKG_SIZE)
memset(&buf[BL_DATA_STR + xfer_len], 0xff,
RM_BL_WRT_PKG_SIZE - xfer_len);
error = raydium_i2c_write_object(client, buf, RM_BL_WRT_LEN,
RAYDIUM_WAIT_READY);
if (error) {
dev_err(&client->dev,
"page write command failed for page %d, chunk %d: %d\n",
page_idx, i, error);
return error;
}
data += xfer_len;
len -= xfer_len;
}
return error;
}
static u16 raydium_calc_chksum(const u8 *buf, u16 len)
{
u16 checksum = 0;
u16 i;
for (i = 0; i < len; i++)
checksum += buf[i];
return checksum;
}
static int raydium_i2c_do_update_firmware(struct raydium_data *ts,
const struct firmware *fw)
{
struct i2c_client *client = ts->client;
const void *data;
size_t data_len;
size_t len;
int page_nr;
int i;
int error;
u16 fw_checksum;
if (fw->size == 0 || fw->size > RM_MAX_FW_SIZE) {
dev_err(&client->dev, "Invalid firmware length\n");
return -EINVAL;
}
error = raydium_i2c_check_fw_status(ts);
if (error) {
dev_err(&client->dev, "Unable to access IC %d\n", error);
return error;
}
if (ts->boot_mode == RAYDIUM_TS_MAIN) {
for (i = 0; i < RM_MAX_RETRIES; i++) {
error = raydium_i2c_enter_bl(client);
if (!error) {
error = raydium_i2c_check_fw_status(ts);
if (error) {
dev_err(&client->dev,
"unable to access IC: %d\n",
error);
return error;
}
if (ts->boot_mode == RAYDIUM_TS_BLDR)
break;
}
}
if (ts->boot_mode == RAYDIUM_TS_MAIN) {
dev_err(&client->dev,
"failed to jump to boot loader: %d\n",
error);
return -EIO;
}
}
error = raydium_i2c_disable_watch_dog(client);
if (error)
return error;
error = raydium_i2c_check_path(client);
if (error)
return error;
error = raydium_i2c_boot_trigger(client);
if (error) {
dev_err(&client->dev, "send boot trigger fail: %d\n", error);
return error;
}
msleep(RM_BOOT_DELAY_MS);
data = fw->data;
data_len = fw->size;
page_nr = 0;
while (data_len) {
len = min_t(size_t, data_len, RM_FW_PAGE_SIZE);
error = raydium_i2c_fw_write_page(client, page_nr++, data, len);
if (error)
return error;
msleep(20);
data += len;
data_len -= len;
}
error = raydium_i2c_leave_bl(client);
if (error) {
dev_err(&client->dev,
"failed to leave boot loader: %d\n", error);
return error;
}
dev_dbg(&client->dev, "left boot loader mode\n");
msleep(RM_BOOT_DELAY_MS);
error = raydium_i2c_check_fw_status(ts);
if (error) {
dev_err(&client->dev,
"failed to check fw status after write: %d\n",
error);
return error;
}
if (ts->boot_mode != RAYDIUM_TS_MAIN) {
dev_err(&client->dev,
"failed to switch to main fw after writing firmware: %d\n",
error);
return -EINVAL;
}
error = raydium_i2c_fw_trigger(client);
if (error) {
dev_err(&client->dev, "failed to trigger fw: %d\n", error);
return error;
}
fw_checksum = raydium_calc_chksum(fw->data, fw->size);
error = raydium_i2c_write_checksum(client, fw->size, fw_checksum);
if (error)
return error;
return 0;
}
static int raydium_i2c_fw_update(struct raydium_data *ts)
{
struct i2c_client *client = ts->client;
const struct firmware *fw = NULL;
char *fw_file;
int error;
fw_file = kasprintf(GFP_KERNEL, "raydium_%#04x.fw",
le32_to_cpu(ts->info.hw_ver));
if (!fw_file)
return -ENOMEM;
dev_dbg(&client->dev, "firmware name: %s\n", fw_file);
error = request_firmware(&fw, fw_file, &client->dev);
if (error) {
dev_err(&client->dev, "Unable to open firmware %s\n", fw_file);
goto out_free_fw_file;
}
disable_irq(client->irq);
error = raydium_i2c_do_update_firmware(ts, fw);
if (error) {
dev_err(&client->dev, "firmware update failed: %d\n", error);
ts->boot_mode = RAYDIUM_TS_BLDR;
goto out_enable_irq;
}
error = raydium_i2c_initialize(ts);
if (error) {
dev_err(&client->dev,
"failed to initialize device after firmware update: %d\n",
error);
ts->boot_mode = RAYDIUM_TS_BLDR;
goto out_enable_irq;
}
ts->boot_mode = RAYDIUM_TS_MAIN;
out_enable_irq:
enable_irq(client->irq);
msleep(100);
release_firmware(fw);
out_free_fw_file:
kfree(fw_file);
return error;
}
static void raydium_mt_event(struct raydium_data *ts)
{
int i;
for (i = 0; i < ts->report_size / ts->contact_size; i++) {
u8 *contact = &ts->report_data[ts->contact_size * i];
bool state = contact[RM_CONTACT_STATE_POS];
u8 wx, wy;
input_mt_slot(ts->input, i);
input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, state);
if (!state)
continue;
input_report_abs(ts->input, ABS_MT_POSITION_X,
get_unaligned_le16(&contact[RM_CONTACT_X_POS]));
input_report_abs(ts->input, ABS_MT_POSITION_Y,
get_unaligned_le16(&contact[RM_CONTACT_Y_POS]));
input_report_abs(ts->input, ABS_MT_PRESSURE,
contact[RM_CONTACT_PRESSURE_POS]);
wx = contact[RM_CONTACT_WIDTH_X_POS];
wy = contact[RM_CONTACT_WIDTH_Y_POS];
input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, max(wx, wy));
input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, min(wx, wy));
}
input_mt_sync_frame(ts->input);
input_sync(ts->input);
}
static irqreturn_t raydium_i2c_irq(int irq, void *_dev)
{
struct raydium_data *ts = _dev;
int error;
u16 fw_crc;
u16 calc_crc;
if (ts->boot_mode != RAYDIUM_TS_MAIN)
goto out;
error = raydium_i2c_read(ts->client, ts->data_bank_addr,
ts->report_data, ts->pkg_size);
if (error)
goto out;
fw_crc = get_unaligned_le16(&ts->report_data[ts->report_size]);
calc_crc = raydium_calc_chksum(ts->report_data, ts->report_size);
if (unlikely(fw_crc != calc_crc)) {
dev_warn(&ts->client->dev,
"%s: invalid packet crc %#04x vs %#04x\n",
__func__, calc_crc, fw_crc);
goto out;
}
raydium_mt_event(ts);
out:
return IRQ_HANDLED;
}
static ssize_t raydium_i2c_fw_ver_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct raydium_data *ts = i2c_get_clientdata(client);
return sprintf(buf, "%d.%d\n", ts->info.main_ver, ts->info.sub_ver);
}
static ssize_t raydium_i2c_hw_ver_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct raydium_data *ts = i2c_get_clientdata(client);
return sprintf(buf, "%#04x\n", le32_to_cpu(ts->info.hw_ver));
}
static ssize_t raydium_i2c_boot_mode_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct raydium_data *ts = i2c_get_clientdata(client);
return sprintf(buf, "%s\n",
ts->boot_mode == RAYDIUM_TS_MAIN ?
"Normal" : "Recovery");
}
static ssize_t raydium_i2c_update_fw_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct raydium_data *ts = i2c_get_clientdata(client);
int error;
error = mutex_lock_interruptible(&ts->sysfs_mutex);
if (error)
return error;
error = raydium_i2c_fw_update(ts);
mutex_unlock(&ts->sysfs_mutex);
return error ?: count;
}
static ssize_t raydium_i2c_calibrate_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct raydium_data *ts = i2c_get_clientdata(client);
static const u8 cal_cmd[] = { 0x00, 0x01, 0x9E };
int error;
error = mutex_lock_interruptible(&ts->sysfs_mutex);
if (error)
return error;
error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd),
RAYDIUM_WAIT_READY);
if (error)
dev_err(&client->dev, "calibrate command failed: %d\n", error);
mutex_unlock(&ts->sysfs_mutex);
return error ?: count;
}
static DEVICE_ATTR(fw_version, S_IRUGO, raydium_i2c_fw_ver_show, NULL);
static DEVICE_ATTR(hw_version, S_IRUGO, raydium_i2c_hw_ver_show, NULL);
static DEVICE_ATTR(boot_mode, S_IRUGO, raydium_i2c_boot_mode_show, NULL);
static DEVICE_ATTR(update_fw, S_IWUSR, NULL, raydium_i2c_update_fw_store);
static DEVICE_ATTR(calibrate, S_IWUSR, NULL, raydium_i2c_calibrate_store);
static struct attribute *raydium_i2c_attributes[] = {
&dev_attr_update_fw.attr,
&dev_attr_boot_mode.attr,
&dev_attr_fw_version.attr,
&dev_attr_hw_version.attr,
&dev_attr_calibrate.attr,
NULL
};
static const struct attribute_group raydium_i2c_attribute_group = {
.attrs = raydium_i2c_attributes,
};
static int raydium_i2c_power_on(struct raydium_data *ts)
{
int error;
if (!ts->reset_gpio)
return 0;
gpiod_set_value_cansleep(ts->reset_gpio, 1);
error = regulator_enable(ts->avdd);
if (error) {
dev_err(&ts->client->dev,
"failed to enable avdd regulator: %d\n", error);
goto release_reset_gpio;
}
error = regulator_enable(ts->vccio);
if (error) {
regulator_disable(ts->avdd);
dev_err(&ts->client->dev,
"failed to enable vccio regulator: %d\n", error);
goto release_reset_gpio;
}
udelay(RM_POWERON_DELAY_USEC);
release_reset_gpio:
gpiod_set_value_cansleep(ts->reset_gpio, 0);
if (error)
return error;
msleep(RM_RESET_DELAY_MSEC);
return 0;
}
static void raydium_i2c_power_off(void *_data)
{
struct raydium_data *ts = _data;
if (ts->reset_gpio) {
gpiod_set_value_cansleep(ts->reset_gpio, 1);
regulator_disable(ts->vccio);
regulator_disable(ts->avdd);
}
}
static int raydium_i2c_probe(struct i2c_client *client)
{
union i2c_smbus_data dummy;
struct raydium_data *ts;
int error;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev,
"i2c check functionality error (need I2C_FUNC_I2C)\n");
return -ENXIO;
}
ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
mutex_init(&ts->sysfs_mutex);
ts->client = client;
i2c_set_clientdata(client, ts);
ts->avdd = devm_regulator_get(&client->dev, "avdd");
if (IS_ERR(ts->avdd))
return dev_err_probe(&client->dev, PTR_ERR(ts->avdd),
"Failed to get 'avdd' regulator\n");
ts->vccio = devm_regulator_get(&client->dev, "vccio");
if (IS_ERR(ts->vccio))
return dev_err_probe(&client->dev, PTR_ERR(ts->vccio),
"Failed to get 'vccio' regulator\n");
ts->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
GPIOD_OUT_LOW);
if (IS_ERR(ts->reset_gpio))
return dev_err_probe(&client->dev, PTR_ERR(ts->reset_gpio),
"Failed to get reset gpio\n");
error = raydium_i2c_power_on(ts);
if (error)
return error;
error = devm_add_action_or_reset(&client->dev,
raydium_i2c_power_off, ts);
if (error) {
dev_err(&client->dev,
"failed to install power off action: %d\n", error);
return error;
}
/* Make sure there is something at this address */
if (i2c_smbus_xfer(client->adapter, client->addr, 0,
I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) {
dev_err(&client->dev, "nothing at this address\n");
return -ENXIO;
}
error = raydium_i2c_initialize(ts);
if (error) {
dev_err(&client->dev, "failed to initialize: %d\n", error);
return error;
}
ts->report_data = devm_kmalloc(&client->dev,
ts->pkg_size, GFP_KERNEL);
if (!ts->report_data)
return -ENOMEM;
ts->input = devm_input_allocate_device(&client->dev);
if (!ts->input) {
dev_err(&client->dev, "Failed to allocate input device\n");
return -ENOMEM;
}
ts->input->name = "Raydium Touchscreen";
ts->input->id.bustype = BUS_I2C;
input_set_abs_params(ts->input, ABS_MT_POSITION_X,
0, le16_to_cpu(ts->info.x_max), 0, 0);
input_set_abs_params(ts->input, ABS_MT_POSITION_Y,
0, le16_to_cpu(ts->info.y_max), 0, 0);
input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->info.x_res);
input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->info.y_res);
input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0);
error = input_mt_init_slots(ts->input, RM_MAX_TOUCH_NUM,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
if (error) {
dev_err(&client->dev,
"failed to initialize MT slots: %d\n", error);
return error;
}
error = input_register_device(ts->input);
if (error) {
dev_err(&client->dev,
"unable to register input device: %d\n", error);
return error;
}
error = devm_request_threaded_irq(&client->dev, client->irq,
NULL, raydium_i2c_irq,
IRQF_ONESHOT, client->name, ts);
if (error) {
dev_err(&client->dev, "Failed to register interrupt\n");
return error;
}
error = devm_device_add_group(&client->dev,
&raydium_i2c_attribute_group);
if (error) {
dev_err(&client->dev, "failed to create sysfs attributes: %d\n",
error);
return error;
}
return 0;
}
static void raydium_enter_sleep(struct i2c_client *client)
{
static const u8 sleep_cmd[] = { 0x5A, 0xff, 0x00, 0x0f };
int error;
error = raydium_i2c_send(client, RM_CMD_ENTER_SLEEP,
sleep_cmd, sizeof(sleep_cmd));
if (error)
dev_err(&client->dev,
"sleep command failed: %d\n", error);
}
static int raydium_i2c_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct raydium_data *ts = i2c_get_clientdata(client);
/* Sleep is not available in BLDR recovery mode */
if (ts->boot_mode != RAYDIUM_TS_MAIN)
return -EBUSY;
disable_irq(client->irq);
if (device_may_wakeup(dev)) {
raydium_enter_sleep(client);
} else {
raydium_i2c_power_off(ts);
}
return 0;
}
static int raydium_i2c_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct raydium_data *ts = i2c_get_clientdata(client);
if (device_may_wakeup(dev)) {
raydium_i2c_sw_reset(client);
} else {
raydium_i2c_power_on(ts);
raydium_i2c_initialize(ts);
}
enable_irq(client->irq);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(raydium_i2c_pm_ops,
raydium_i2c_suspend, raydium_i2c_resume);
static const struct i2c_device_id raydium_i2c_id[] = {
{ "raydium_i2c", 0 },
{ "rm32380", 0 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(i2c, raydium_i2c_id);
#ifdef CONFIG_ACPI
static const struct acpi_device_id raydium_acpi_id[] = {
{ "RAYD0001", 0 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(acpi, raydium_acpi_id);
#endif
#ifdef CONFIG_OF
static const struct of_device_id raydium_of_match[] = {
{ .compatible = "raydium,rm32380", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, raydium_of_match);
#endif
static struct i2c_driver raydium_i2c_driver = {
.probe = raydium_i2c_probe,
.id_table = raydium_i2c_id,
.driver = {
.name = "raydium_ts",
.pm = pm_sleep_ptr(&raydium_i2c_pm_ops),
.acpi_match_table = ACPI_PTR(raydium_acpi_id),
.of_match_table = of_match_ptr(raydium_of_match),
},
};
module_i2c_driver(raydium_i2c_driver);
MODULE_AUTHOR("Raydium");
MODULE_DESCRIPTION("Raydium I2c Touchscreen driver");
MODULE_LICENSE("GPL v2");
|
linux-master
|
drivers/input/touchscreen/raydium_i2c_ts.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2015 Broadcom Corporation
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/keyboard.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <asm/irq.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/serio.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#define IPROC_TS_NAME "iproc-ts"
#define PEN_DOWN_STATUS 1
#define PEN_UP_STATUS 0
#define X_MIN 0
#define Y_MIN 0
#define X_MAX 0xFFF
#define Y_MAX 0xFFF
/* Value given by controller for invalid coordinate. */
#define INVALID_COORD 0xFFFFFFFF
/* Register offsets */
#define REGCTL1 0x00
#define REGCTL2 0x04
#define INTERRUPT_THRES 0x08
#define INTERRUPT_MASK 0x0c
#define INTERRUPT_STATUS 0x10
#define CONTROLLER_STATUS 0x14
#define FIFO_DATA 0x18
#define FIFO_DATA_X_Y_MASK 0xFFFF
#define ANALOG_CONTROL 0x1c
#define AUX_DATA 0x20
#define DEBOUNCE_CNTR_STAT 0x24
#define SCAN_CNTR_STAT 0x28
#define REM_CNTR_STAT 0x2c
#define SETTLING_TIMER_STAT 0x30
#define SPARE_REG 0x34
#define SOFT_BYPASS_CONTROL 0x38
#define SOFT_BYPASS_DATA 0x3c
/* Bit values for INTERRUPT_MASK and INTERRUPT_STATUS regs */
#define TS_PEN_INTR_MASK BIT(0)
#define TS_FIFO_INTR_MASK BIT(2)
/* Bit values for CONTROLLER_STATUS reg1 */
#define TS_PEN_DOWN BIT(0)
/* Shift values for control reg1 */
#define SCANNING_PERIOD_SHIFT 24
#define DEBOUNCE_TIMEOUT_SHIFT 16
#define SETTLING_TIMEOUT_SHIFT 8
#define TOUCH_TIMEOUT_SHIFT 0
/* Shift values for coordinates from fifo */
#define X_COORD_SHIFT 0
#define Y_COORD_SHIFT 16
/* Bit values for REGCTL2 */
#define TS_CONTROLLER_EN_BIT BIT(16)
#define TS_CONTROLLER_AVGDATA_SHIFT 8
#define TS_CONTROLLER_AVGDATA_MASK (0x7 << TS_CONTROLLER_AVGDATA_SHIFT)
#define TS_CONTROLLER_PWR_LDO BIT(5)
#define TS_CONTROLLER_PWR_ADC BIT(4)
#define TS_CONTROLLER_PWR_BGP BIT(3)
#define TS_CONTROLLER_PWR_TS BIT(2)
#define TS_WIRE_MODE_BIT BIT(1)
#define dbg_reg(dev, priv, reg) \
do { \
u32 val; \
regmap_read(priv->regmap, reg, &val); \
dev_dbg(dev, "%20s= 0x%08x\n", #reg, val); \
} while (0)
struct tsc_param {
/* Each step is 1024 us. Valid 1-256 */
u32 scanning_period;
/* Each step is 512 us. Valid 0-255 */
u32 debounce_timeout;
/*
* The settling duration (in ms) is the amount of time the tsc
* waits to allow the voltage to settle after turning on the
* drivers in detection mode. Valid values: 0-11
* 0 = 0.008 ms
* 1 = 0.01 ms
* 2 = 0.02 ms
* 3 = 0.04 ms
* 4 = 0.08 ms
* 5 = 0.16 ms
* 6 = 0.32 ms
* 7 = 0.64 ms
* 8 = 1.28 ms
* 9 = 2.56 ms
* 10 = 5.12 ms
* 11 = 10.24 ms
*/
u32 settling_timeout;
/* touch timeout in sample counts */
u32 touch_timeout;
/*
* Number of data samples which are averaged before a final data point
* is placed into the FIFO
*/
u32 average_data;
/* FIFO threshold */
u32 fifo_threshold;
/* Optional standard touchscreen properties. */
u32 max_x;
u32 max_y;
u32 fuzz_x;
u32 fuzz_y;
bool invert_x;
bool invert_y;
};
struct iproc_ts_priv {
struct platform_device *pdev;
struct input_dev *idev;
struct regmap *regmap;
struct clk *tsc_clk;
int pen_status;
struct tsc_param cfg_params;
};
/*
* Set default values the same as hardware reset values
* except for fifo_threshold with is set to 1.
*/
static const struct tsc_param iproc_default_config = {
.scanning_period = 0x5, /* 1 to 256 */
.debounce_timeout = 0x28, /* 0 to 255 */
.settling_timeout = 0x7, /* 0 to 11 */
.touch_timeout = 0xa, /* 0 to 255 */
.average_data = 5, /* entry 5 = 32 pts */
.fifo_threshold = 1, /* 0 to 31 */
.max_x = X_MAX,
.max_y = Y_MAX,
};
static void ts_reg_dump(struct iproc_ts_priv *priv)
{
struct device *dev = &priv->pdev->dev;
dbg_reg(dev, priv, REGCTL1);
dbg_reg(dev, priv, REGCTL2);
dbg_reg(dev, priv, INTERRUPT_THRES);
dbg_reg(dev, priv, INTERRUPT_MASK);
dbg_reg(dev, priv, INTERRUPT_STATUS);
dbg_reg(dev, priv, CONTROLLER_STATUS);
dbg_reg(dev, priv, FIFO_DATA);
dbg_reg(dev, priv, ANALOG_CONTROL);
dbg_reg(dev, priv, AUX_DATA);
dbg_reg(dev, priv, DEBOUNCE_CNTR_STAT);
dbg_reg(dev, priv, SCAN_CNTR_STAT);
dbg_reg(dev, priv, REM_CNTR_STAT);
dbg_reg(dev, priv, SETTLING_TIMER_STAT);
dbg_reg(dev, priv, SPARE_REG);
dbg_reg(dev, priv, SOFT_BYPASS_CONTROL);
dbg_reg(dev, priv, SOFT_BYPASS_DATA);
}
static irqreturn_t iproc_touchscreen_interrupt(int irq, void *data)
{
struct platform_device *pdev = data;
struct iproc_ts_priv *priv = platform_get_drvdata(pdev);
u32 intr_status;
u32 raw_coordinate;
u16 x;
u16 y;
int i;
bool needs_sync = false;
regmap_read(priv->regmap, INTERRUPT_STATUS, &intr_status);
intr_status &= TS_PEN_INTR_MASK | TS_FIFO_INTR_MASK;
if (intr_status == 0)
return IRQ_NONE;
/* Clear all interrupt status bits, write-1-clear */
regmap_write(priv->regmap, INTERRUPT_STATUS, intr_status);
/* Pen up/down */
if (intr_status & TS_PEN_INTR_MASK) {
regmap_read(priv->regmap, CONTROLLER_STATUS, &priv->pen_status);
if (priv->pen_status & TS_PEN_DOWN)
priv->pen_status = PEN_DOWN_STATUS;
else
priv->pen_status = PEN_UP_STATUS;
input_report_key(priv->idev, BTN_TOUCH, priv->pen_status);
needs_sync = true;
dev_dbg(&priv->pdev->dev,
"pen up-down (%d)\n", priv->pen_status);
}
/* coordinates in FIFO exceed the theshold */
if (intr_status & TS_FIFO_INTR_MASK) {
for (i = 0; i < priv->cfg_params.fifo_threshold; i++) {
regmap_read(priv->regmap, FIFO_DATA, &raw_coordinate);
if (raw_coordinate == INVALID_COORD)
continue;
/*
* The x and y coordinate are 16 bits each
* with the x in the lower 16 bits and y in the
* upper 16 bits.
*/
x = (raw_coordinate >> X_COORD_SHIFT) &
FIFO_DATA_X_Y_MASK;
y = (raw_coordinate >> Y_COORD_SHIFT) &
FIFO_DATA_X_Y_MASK;
/* We only want to retain the 12 msb of the 16 */
x = (x >> 4) & 0x0FFF;
y = (y >> 4) & 0x0FFF;
/* Adjust x y according to LCD tsc mount angle. */
if (priv->cfg_params.invert_x)
x = priv->cfg_params.max_x - x;
if (priv->cfg_params.invert_y)
y = priv->cfg_params.max_y - y;
input_report_abs(priv->idev, ABS_X, x);
input_report_abs(priv->idev, ABS_Y, y);
needs_sync = true;
dev_dbg(&priv->pdev->dev, "xy (0x%x 0x%x)\n", x, y);
}
}
if (needs_sync)
input_sync(priv->idev);
return IRQ_HANDLED;
}
static int iproc_ts_start(struct input_dev *idev)
{
u32 val;
u32 mask;
int error;
struct iproc_ts_priv *priv = input_get_drvdata(idev);
/* Enable clock */
error = clk_prepare_enable(priv->tsc_clk);
if (error) {
dev_err(&priv->pdev->dev, "%s clk_prepare_enable failed %d\n",
__func__, error);
return error;
}
/*
* Interrupt is generated when:
* FIFO reaches the int_th value, and pen event(up/down)
*/
val = TS_PEN_INTR_MASK | TS_FIFO_INTR_MASK;
regmap_update_bits(priv->regmap, INTERRUPT_MASK, val, val);
val = priv->cfg_params.fifo_threshold;
regmap_write(priv->regmap, INTERRUPT_THRES, val);
/* Initialize control reg1 */
val = 0;
val |= priv->cfg_params.scanning_period << SCANNING_PERIOD_SHIFT;
val |= priv->cfg_params.debounce_timeout << DEBOUNCE_TIMEOUT_SHIFT;
val |= priv->cfg_params.settling_timeout << SETTLING_TIMEOUT_SHIFT;
val |= priv->cfg_params.touch_timeout << TOUCH_TIMEOUT_SHIFT;
regmap_write(priv->regmap, REGCTL1, val);
/* Try to clear all interrupt status */
val = TS_FIFO_INTR_MASK | TS_PEN_INTR_MASK;
regmap_update_bits(priv->regmap, INTERRUPT_STATUS, val, val);
/* Initialize control reg2 */
val = TS_CONTROLLER_EN_BIT | TS_WIRE_MODE_BIT;
val |= priv->cfg_params.average_data << TS_CONTROLLER_AVGDATA_SHIFT;
mask = (TS_CONTROLLER_AVGDATA_MASK);
mask |= (TS_CONTROLLER_PWR_LDO | /* PWR up LDO */
TS_CONTROLLER_PWR_ADC | /* PWR up ADC */
TS_CONTROLLER_PWR_BGP | /* PWR up BGP */
TS_CONTROLLER_PWR_TS); /* PWR up TS */
mask |= val;
regmap_update_bits(priv->regmap, REGCTL2, mask, val);
ts_reg_dump(priv);
return 0;
}
static void iproc_ts_stop(struct input_dev *dev)
{
u32 val;
struct iproc_ts_priv *priv = input_get_drvdata(dev);
/*
* Disable FIFO int_th and pen event(up/down)Interrupts only
* as the interrupt mask register is shared between ADC, TS and
* flextimer.
*/
val = TS_PEN_INTR_MASK | TS_FIFO_INTR_MASK;
regmap_update_bits(priv->regmap, INTERRUPT_MASK, val, 0);
/* Only power down touch screen controller */
val = TS_CONTROLLER_PWR_TS;
regmap_update_bits(priv->regmap, REGCTL2, val, val);
clk_disable(priv->tsc_clk);
}
static int iproc_get_tsc_config(struct device *dev, struct iproc_ts_priv *priv)
{
struct device_node *np = dev->of_node;
u32 val;
priv->cfg_params = iproc_default_config;
if (!np)
return 0;
if (of_property_read_u32(np, "scanning_period", &val) >= 0) {
if (val < 1 || val > 256) {
dev_err(dev, "scanning_period (%u) must be [1-256]\n",
val);
return -EINVAL;
}
priv->cfg_params.scanning_period = val;
}
if (of_property_read_u32(np, "debounce_timeout", &val) >= 0) {
if (val > 255) {
dev_err(dev, "debounce_timeout (%u) must be [0-255]\n",
val);
return -EINVAL;
}
priv->cfg_params.debounce_timeout = val;
}
if (of_property_read_u32(np, "settling_timeout", &val) >= 0) {
if (val > 11) {
dev_err(dev, "settling_timeout (%u) must be [0-11]\n",
val);
return -EINVAL;
}
priv->cfg_params.settling_timeout = val;
}
if (of_property_read_u32(np, "touch_timeout", &val) >= 0) {
if (val > 255) {
dev_err(dev, "touch_timeout (%u) must be [0-255]\n",
val);
return -EINVAL;
}
priv->cfg_params.touch_timeout = val;
}
if (of_property_read_u32(np, "average_data", &val) >= 0) {
if (val > 8) {
dev_err(dev, "average_data (%u) must be [0-8]\n", val);
return -EINVAL;
}
priv->cfg_params.average_data = val;
}
if (of_property_read_u32(np, "fifo_threshold", &val) >= 0) {
if (val > 31) {
dev_err(dev, "fifo_threshold (%u)) must be [0-31]\n",
val);
return -EINVAL;
}
priv->cfg_params.fifo_threshold = val;
}
/* Parse optional properties. */
of_property_read_u32(np, "touchscreen-size-x", &priv->cfg_params.max_x);
of_property_read_u32(np, "touchscreen-size-y", &priv->cfg_params.max_y);
of_property_read_u32(np, "touchscreen-fuzz-x",
&priv->cfg_params.fuzz_x);
of_property_read_u32(np, "touchscreen-fuzz-y",
&priv->cfg_params.fuzz_y);
priv->cfg_params.invert_x =
of_property_read_bool(np, "touchscreen-inverted-x");
priv->cfg_params.invert_y =
of_property_read_bool(np, "touchscreen-inverted-y");
return 0;
}
static int iproc_ts_probe(struct platform_device *pdev)
{
struct iproc_ts_priv *priv;
struct input_dev *idev;
int irq;
int error;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
/* touchscreen controller memory mapped regs via syscon*/
priv->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
"ts_syscon");
if (IS_ERR(priv->regmap)) {
error = PTR_ERR(priv->regmap);
dev_err(&pdev->dev, "unable to map I/O memory:%d\n", error);
return error;
}
priv->tsc_clk = devm_clk_get(&pdev->dev, "tsc_clk");
if (IS_ERR(priv->tsc_clk)) {
error = PTR_ERR(priv->tsc_clk);
dev_err(&pdev->dev,
"failed getting clock tsc_clk: %d\n", error);
return error;
}
priv->pdev = pdev;
error = iproc_get_tsc_config(&pdev->dev, priv);
if (error) {
dev_err(&pdev->dev, "get_tsc_config failed: %d\n", error);
return error;
}
idev = devm_input_allocate_device(&pdev->dev);
if (!idev) {
dev_err(&pdev->dev, "failed to allocate input device\n");
return -ENOMEM;
}
priv->idev = idev;
priv->pen_status = PEN_UP_STATUS;
/* Set input device info */
idev->name = IPROC_TS_NAME;
idev->dev.parent = &pdev->dev;
idev->id.bustype = BUS_HOST;
idev->id.vendor = SERIO_UNKNOWN;
idev->id.product = 0;
idev->id.version = 0;
idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
__set_bit(BTN_TOUCH, idev->keybit);
input_set_abs_params(idev, ABS_X, X_MIN, priv->cfg_params.max_x,
priv->cfg_params.fuzz_x, 0);
input_set_abs_params(idev, ABS_Y, Y_MIN, priv->cfg_params.max_y,
priv->cfg_params.fuzz_y, 0);
idev->open = iproc_ts_start;
idev->close = iproc_ts_stop;
input_set_drvdata(idev, priv);
platform_set_drvdata(pdev, priv);
/* get interrupt */
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
error = devm_request_irq(&pdev->dev, irq,
iproc_touchscreen_interrupt,
IRQF_SHARED, IPROC_TS_NAME, pdev);
if (error)
return error;
error = input_register_device(priv->idev);
if (error) {
dev_err(&pdev->dev,
"failed to register input device: %d\n", error);
return error;
}
return 0;
}
static const struct of_device_id iproc_ts_of_match[] = {
{.compatible = "brcm,iproc-touchscreen", },
{ },
};
MODULE_DEVICE_TABLE(of, iproc_ts_of_match);
static struct platform_driver iproc_ts_driver = {
.probe = iproc_ts_probe,
.driver = {
.name = IPROC_TS_NAME,
.of_match_table = iproc_ts_of_match,
},
};
module_platform_driver(iproc_ts_driver);
MODULE_DESCRIPTION("IPROC Touchscreen driver");
MODULE_AUTHOR("Broadcom");
MODULE_LICENSE("GPL v2");
|
linux-master
|
drivers/input/touchscreen/bcm_iproc_tsc.c
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Driver for ChipOne icn8505 i2c touchscreen controller
*
* Copyright (c) 2015-2018 Red Hat Inc.
*
* Red Hat authors:
* Hans de Goede <[email protected]>
*/
#include <asm/unaligned.h>
#include <linux/acpi.h>
#include <linux/crc32.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/module.h>
/* Normal operation mode defines */
#define ICN8505_REG_ADDR_WIDTH 16
#define ICN8505_REG_POWER 0x0004
#define ICN8505_REG_TOUCHDATA 0x1000
#define ICN8505_REG_CONFIGDATA 0x8000
/* ICN8505_REG_POWER commands */
#define ICN8505_POWER_ACTIVE 0x00
#define ICN8505_POWER_MONITOR 0x01
#define ICN8505_POWER_HIBERNATE 0x02
/*
* The Android driver uses these to turn on/off the charger filter, but the
* filter is way too aggressive making e.g. onscreen keyboards unusable.
*/
#define ICN8505_POWER_ENA_CHARGER_MODE 0x55
#define ICN8505_POWER_DIS_CHARGER_MODE 0x66
#define ICN8505_MAX_TOUCHES 10
/* Programming mode defines */
#define ICN8505_PROG_I2C_ADDR 0x30
#define ICN8505_PROG_REG_ADDR_WIDTH 24
#define MAX_FW_UPLOAD_TRIES 3
struct icn8505_touch {
u8 slot;
u8 x[2];
u8 y[2];
u8 pressure; /* Seems more like finger width then pressure really */
u8 event;
/* The difference between 2 and 3 is unclear */
#define ICN8505_EVENT_NO_DATA 1 /* No finger seen yet since wakeup */
#define ICN8505_EVENT_UPDATE1 2 /* New or updated coordinates */
#define ICN8505_EVENT_UPDATE2 3 /* New or updated coordinates */
#define ICN8505_EVENT_END 4 /* Finger lifted */
} __packed;
struct icn8505_touch_data {
u8 softbutton;
u8 touch_count;
struct icn8505_touch touches[ICN8505_MAX_TOUCHES];
} __packed;
struct icn8505_data {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *wake_gpio;
struct touchscreen_properties prop;
char firmware_name[32];
};
static int icn8505_read_xfer(struct i2c_client *client, u16 i2c_addr,
int reg_addr, int reg_addr_width,
void *data, int len, bool silent)
{
u8 buf[3];
int i, ret;
struct i2c_msg msg[2] = {
{
.addr = i2c_addr,
.buf = buf,
.len = reg_addr_width / 8,
},
{
.addr = i2c_addr,
.flags = I2C_M_RD,
.buf = data,
.len = len,
}
};
for (i = 0; i < (reg_addr_width / 8); i++)
buf[i] = (reg_addr >> (reg_addr_width - (i + 1) * 8)) & 0xff;
ret = i2c_transfer(client->adapter, msg, 2);
if (ret != ARRAY_SIZE(msg)) {
if (ret >= 0)
ret = -EIO;
if (!silent)
dev_err(&client->dev,
"Error reading addr %#x reg %#x: %d\n",
i2c_addr, reg_addr, ret);
return ret;
}
return 0;
}
static int icn8505_write_xfer(struct i2c_client *client, u16 i2c_addr,
int reg_addr, int reg_addr_width,
const void *data, int len, bool silent)
{
u8 buf[3 + 32]; /* 3 bytes for 24 bit reg-addr + 32 bytes max len */
int i, ret;
struct i2c_msg msg = {
.addr = i2c_addr,
.buf = buf,
.len = reg_addr_width / 8 + len,
};
if (WARN_ON(len > 32))
return -EINVAL;
for (i = 0; i < (reg_addr_width / 8); i++)
buf[i] = (reg_addr >> (reg_addr_width - (i + 1) * 8)) & 0xff;
memcpy(buf + reg_addr_width / 8, data, len);
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret != 1) {
if (ret >= 0)
ret = -EIO;
if (!silent)
dev_err(&client->dev,
"Error writing addr %#x reg %#x: %d\n",
i2c_addr, reg_addr, ret);
return ret;
}
return 0;
}
static int icn8505_read_data(struct icn8505_data *icn8505, int reg,
void *buf, int len)
{
return icn8505_read_xfer(icn8505->client, icn8505->client->addr, reg,
ICN8505_REG_ADDR_WIDTH, buf, len, false);
}
static int icn8505_read_reg_silent(struct icn8505_data *icn8505, int reg)
{
u8 buf;
int error;
error = icn8505_read_xfer(icn8505->client, icn8505->client->addr, reg,
ICN8505_REG_ADDR_WIDTH, &buf, 1, true);
if (error)
return error;
return buf;
}
static int icn8505_write_reg(struct icn8505_data *icn8505, int reg, u8 val)
{
return icn8505_write_xfer(icn8505->client, icn8505->client->addr, reg,
ICN8505_REG_ADDR_WIDTH, &val, 1, false);
}
static int icn8505_read_prog_data(struct icn8505_data *icn8505, int reg,
void *buf, int len)
{
return icn8505_read_xfer(icn8505->client, ICN8505_PROG_I2C_ADDR, reg,
ICN8505_PROG_REG_ADDR_WIDTH, buf, len, false);
}
static int icn8505_write_prog_data(struct icn8505_data *icn8505, int reg,
const void *buf, int len)
{
return icn8505_write_xfer(icn8505->client, ICN8505_PROG_I2C_ADDR, reg,
ICN8505_PROG_REG_ADDR_WIDTH, buf, len, false);
}
static int icn8505_write_prog_reg(struct icn8505_data *icn8505, int reg, u8 val)
{
return icn8505_write_xfer(icn8505->client, ICN8505_PROG_I2C_ADDR, reg,
ICN8505_PROG_REG_ADDR_WIDTH, &val, 1, false);
}
/*
* Note this function uses a number of magic register addresses and values,
* there are deliberately no defines for these because the algorithm is taken
* from the icn85xx Android driver and I do not want to make up possibly wrong
* names for the addresses and/or values.
*/
static int icn8505_try_fw_upload(struct icn8505_data *icn8505,
const struct firmware *fw)
{
struct device *dev = &icn8505->client->dev;
size_t offset, count;
int error;
u8 buf[4];
u32 crc;
/* Put the controller in programming mode */
error = icn8505_write_prog_reg(icn8505, 0xcc3355, 0x5a);
if (error)
return error;
usleep_range(2000, 5000);
error = icn8505_write_prog_reg(icn8505, 0x040400, 0x01);
if (error)
return error;
usleep_range(2000, 5000);
error = icn8505_read_prog_data(icn8505, 0x040002, buf, 1);
if (error)
return error;
if (buf[0] != 0x85) {
dev_err(dev, "Failed to enter programming mode\n");
return -ENODEV;
}
usleep_range(1000, 5000);
/* Enable CRC mode */
error = icn8505_write_prog_reg(icn8505, 0x40028, 1);
if (error)
return error;
/* Send the firmware to SRAM */
for (offset = 0; offset < fw->size; offset += count) {
count = min_t(size_t, fw->size - offset, 32);
error = icn8505_write_prog_data(icn8505, offset,
fw->data + offset, count);
if (error)
return error;
}
/* Disable CRC mode */
error = icn8505_write_prog_reg(icn8505, 0x40028, 0);
if (error)
return error;
/* Get and check length and CRC */
error = icn8505_read_prog_data(icn8505, 0x40034, buf, 2);
if (error)
return error;
if (get_unaligned_le16(buf) != fw->size) {
dev_warn(dev, "Length mismatch after uploading fw\n");
return -EIO;
}
error = icn8505_read_prog_data(icn8505, 0x4002c, buf, 4);
if (error)
return error;
crc = crc32_be(0, fw->data, fw->size);
if (get_unaligned_le32(buf) != crc) {
dev_warn(dev, "CRC mismatch after uploading fw\n");
return -EIO;
}
/* Boot controller from SRAM */
error = icn8505_write_prog_reg(icn8505, 0x40400, 0x03);
if (error)
return error;
usleep_range(2000, 5000);
return 0;
}
static int icn8505_upload_fw(struct icn8505_data *icn8505)
{
struct device *dev = &icn8505->client->dev;
const struct firmware *fw;
int i, error;
/*
* Always load the firmware, even if we don't need it at boot, we
* we may need it at resume. Having loaded it once will make the
* firmware class code cache it at suspend/resume.
*/
error = firmware_request_platform(&fw, icn8505->firmware_name, dev);
if (error) {
dev_err(dev, "Firmware request error %d\n", error);
return error;
}
/* Check if the controller is not already up and running */
if (icn8505_read_reg_silent(icn8505, 0x000a) == 0x85)
goto success;
for (i = 1; i <= MAX_FW_UPLOAD_TRIES; i++) {
error = icn8505_try_fw_upload(icn8505, fw);
if (!error)
goto success;
dev_err(dev, "Failed to upload firmware: %d (attempt %d/%d)\n",
error, i, MAX_FW_UPLOAD_TRIES);
usleep_range(2000, 5000);
}
success:
release_firmware(fw);
return error;
}
static bool icn8505_touch_active(u8 event)
{
return event == ICN8505_EVENT_UPDATE1 ||
event == ICN8505_EVENT_UPDATE2;
}
static irqreturn_t icn8505_irq(int irq, void *dev_id)
{
struct icn8505_data *icn8505 = dev_id;
struct device *dev = &icn8505->client->dev;
struct icn8505_touch_data touch_data;
int i, error;
error = icn8505_read_data(icn8505, ICN8505_REG_TOUCHDATA,
&touch_data, sizeof(touch_data));
if (error) {
dev_err(dev, "Error reading touch data: %d\n", error);
return IRQ_HANDLED;
}
if (touch_data.touch_count > ICN8505_MAX_TOUCHES) {
dev_warn(dev, "Too many touches %d > %d\n",
touch_data.touch_count, ICN8505_MAX_TOUCHES);
touch_data.touch_count = ICN8505_MAX_TOUCHES;
}
for (i = 0; i < touch_data.touch_count; i++) {
struct icn8505_touch *touch = &touch_data.touches[i];
bool act = icn8505_touch_active(touch->event);
input_mt_slot(icn8505->input, touch->slot);
input_mt_report_slot_state(icn8505->input, MT_TOOL_FINGER, act);
if (!act)
continue;
touchscreen_report_pos(icn8505->input, &icn8505->prop,
get_unaligned_le16(touch->x),
get_unaligned_le16(touch->y),
true);
}
input_mt_sync_frame(icn8505->input);
input_report_key(icn8505->input, KEY_LEFTMETA,
touch_data.softbutton == 1);
input_sync(icn8505->input);
return IRQ_HANDLED;
}
static int icn8505_probe_acpi(struct icn8505_data *icn8505, struct device *dev)
{
const char *subsys;
int error;
subsys = acpi_get_subsystem_id(ACPI_HANDLE(dev));
error = PTR_ERR_OR_ZERO(subsys);
if (error == -ENODATA)
subsys = "unknown";
else if (error)
return error;
snprintf(icn8505->firmware_name, sizeof(icn8505->firmware_name),
"chipone/icn8505-%s.fw", subsys);
kfree_const(subsys);
return 0;
}
static int icn8505_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct icn8505_data *icn8505;
struct input_dev *input;
__le16 resolution[2];
int error;
if (!client->irq) {
dev_err(dev, "No irq specified\n");
return -EINVAL;
}
icn8505 = devm_kzalloc(dev, sizeof(*icn8505), GFP_KERNEL);
if (!icn8505)
return -ENOMEM;
input = devm_input_allocate_device(dev);
if (!input)
return -ENOMEM;
input->name = client->name;
input->id.bustype = BUS_I2C;
input_set_capability(input, EV_ABS, ABS_MT_POSITION_X);
input_set_capability(input, EV_ABS, ABS_MT_POSITION_Y);
input_set_capability(input, EV_KEY, KEY_LEFTMETA);
icn8505->client = client;
icn8505->input = input;
input_set_drvdata(input, icn8505);
error = icn8505_probe_acpi(icn8505, dev);
if (error)
return error;
error = icn8505_upload_fw(icn8505);
if (error)
return error;
error = icn8505_read_data(icn8505, ICN8505_REG_CONFIGDATA,
resolution, sizeof(resolution));
if (error) {
dev_err(dev, "Error reading resolution: %d\n", error);
return error;
}
input_set_abs_params(input, ABS_MT_POSITION_X, 0,
le16_to_cpu(resolution[0]) - 1, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
le16_to_cpu(resolution[1]) - 1, 0, 0);
touchscreen_parse_properties(input, true, &icn8505->prop);
if (!input_abs_get_max(input, ABS_MT_POSITION_X) ||
!input_abs_get_max(input, ABS_MT_POSITION_Y)) {
dev_err(dev, "Error touchscreen-size-x and/or -y missing\n");
return -EINVAL;
}
error = input_mt_init_slots(input, ICN8505_MAX_TOUCHES,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
if (error)
return error;
error = devm_request_threaded_irq(dev, client->irq, NULL, icn8505_irq,
IRQF_ONESHOT, client->name, icn8505);
if (error) {
dev_err(dev, "Error requesting irq: %d\n", error);
return error;
}
error = input_register_device(input);
if (error)
return error;
i2c_set_clientdata(client, icn8505);
return 0;
}
static int icn8505_suspend(struct device *dev)
{
struct icn8505_data *icn8505 = i2c_get_clientdata(to_i2c_client(dev));
disable_irq(icn8505->client->irq);
icn8505_write_reg(icn8505, ICN8505_REG_POWER, ICN8505_POWER_HIBERNATE);
return 0;
}
static int icn8505_resume(struct device *dev)
{
struct icn8505_data *icn8505 = i2c_get_clientdata(to_i2c_client(dev));
int error;
error = icn8505_upload_fw(icn8505);
if (error)
return error;
enable_irq(icn8505->client->irq);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(icn8505_pm_ops, icn8505_suspend, icn8505_resume);
static const struct acpi_device_id icn8505_acpi_match[] = {
{ "CHPN0001" },
{ }
};
MODULE_DEVICE_TABLE(acpi, icn8505_acpi_match);
static struct i2c_driver icn8505_driver = {
.driver = {
.name = "chipone_icn8505",
.pm = pm_sleep_ptr(&icn8505_pm_ops),
.acpi_match_table = icn8505_acpi_match,
},
.probe = icn8505_probe,
};
module_i2c_driver(icn8505_driver);
MODULE_DESCRIPTION("ChipOne icn8505 I2C Touchscreen Driver");
MODULE_AUTHOR("Hans de Goede <[email protected]>");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/chipone_icn8505.c
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Azoteq IQS550/572/525 Trackpad/Touchscreen Controller
*
* Copyright (C) 2018 Jeff LaBundy <[email protected]>
*
* These devices require firmware exported from a PC-based configuration tool
* made available by the vendor. Firmware files may be pushed to the device's
* nonvolatile memory by writing the filename to the 'fw_file' sysfs control.
*
* Link to PC-based configuration tool and datasheet: https://www.azoteq.com/
*/
#include <linux/bits.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/firmware.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <asm/unaligned.h>
#define IQS5XX_FW_FILE_LEN 64
#define IQS5XX_NUM_RETRIES 10
#define IQS5XX_NUM_CONTACTS 5
#define IQS5XX_WR_BYTES_MAX 2
#define IQS5XX_PROD_NUM_IQS550 40
#define IQS5XX_PROD_NUM_IQS572 58
#define IQS5XX_PROD_NUM_IQS525 52
#define IQS5XX_SHOW_RESET BIT(7)
#define IQS5XX_ACK_RESET BIT(7)
#define IQS5XX_SUSPEND BIT(0)
#define IQS5XX_RESUME 0
#define IQS5XX_SETUP_COMPLETE BIT(6)
#define IQS5XX_WDT BIT(5)
#define IQS5XX_ALP_REATI BIT(3)
#define IQS5XX_REATI BIT(2)
#define IQS5XX_TP_EVENT BIT(2)
#define IQS5XX_EVENT_MODE BIT(0)
#define IQS5XX_PROD_NUM 0x0000
#define IQS5XX_SYS_INFO0 0x000F
#define IQS5XX_SYS_INFO1 0x0010
#define IQS5XX_SYS_CTRL0 0x0431
#define IQS5XX_SYS_CTRL1 0x0432
#define IQS5XX_SYS_CFG0 0x058E
#define IQS5XX_SYS_CFG1 0x058F
#define IQS5XX_X_RES 0x066E
#define IQS5XX_Y_RES 0x0670
#define IQS5XX_EXP_FILE 0x0677
#define IQS5XX_CHKSM 0x83C0
#define IQS5XX_APP 0x8400
#define IQS5XX_CSTM 0xBE00
#define IQS5XX_PMAP_END 0xBFFF
#define IQS5XX_END_COMM 0xEEEE
#define IQS5XX_CHKSM_LEN (IQS5XX_APP - IQS5XX_CHKSM)
#define IQS5XX_APP_LEN (IQS5XX_CSTM - IQS5XX_APP)
#define IQS5XX_CSTM_LEN (IQS5XX_PMAP_END + 1 - IQS5XX_CSTM)
#define IQS5XX_PMAP_LEN (IQS5XX_PMAP_END + 1 - IQS5XX_CHKSM)
#define IQS5XX_REC_HDR_LEN 4
#define IQS5XX_REC_LEN_MAX 255
#define IQS5XX_REC_TYPE_DATA 0x00
#define IQS5XX_REC_TYPE_EOF 0x01
#define IQS5XX_BL_ADDR_MASK 0x40
#define IQS5XX_BL_CMD_VER 0x00
#define IQS5XX_BL_CMD_READ 0x01
#define IQS5XX_BL_CMD_EXEC 0x02
#define IQS5XX_BL_CMD_CRC 0x03
#define IQS5XX_BL_BLK_LEN_MAX 64
#define IQS5XX_BL_ID 0x0200
#define IQS5XX_BL_STATUS_NONE 0xEE
#define IQS5XX_BL_CRC_PASS 0x00
#define IQS5XX_BL_CRC_FAIL 0x01
#define IQS5XX_BL_ATTEMPTS 3
struct iqs5xx_dev_id_info {
__be16 prod_num;
__be16 proj_num;
u8 major_ver;
u8 minor_ver;
u8 bl_status;
} __packed;
struct iqs5xx_ihex_rec {
char start;
char len[2];
char addr[4];
char type[2];
char data[2];
} __packed;
struct iqs5xx_touch_data {
__be16 abs_x;
__be16 abs_y;
__be16 strength;
u8 area;
} __packed;
struct iqs5xx_status {
u8 sys_info[2];
u8 num_active;
__be16 rel_x;
__be16 rel_y;
struct iqs5xx_touch_data touch_data[IQS5XX_NUM_CONTACTS];
} __packed;
struct iqs5xx_private {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *reset_gpio;
struct touchscreen_properties prop;
struct mutex lock;
struct iqs5xx_dev_id_info dev_id_info;
u8 exp_file[2];
};
static int iqs5xx_read_burst(struct i2c_client *client,
u16 reg, void *val, u16 len)
{
__be16 reg_buf = cpu_to_be16(reg);
int ret, i;
struct i2c_msg msg[] = {
{
.addr = client->addr,
.flags = 0,
.len = sizeof(reg_buf),
.buf = (u8 *)®_buf,
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = len,
.buf = (u8 *)val,
},
};
/*
* The first addressing attempt outside of a communication window fails
* and must be retried, after which the device clock stretches until it
* is available.
*/
for (i = 0; i < IQS5XX_NUM_RETRIES; i++) {
ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
if (ret == ARRAY_SIZE(msg))
return 0;
usleep_range(200, 300);
}
if (ret >= 0)
ret = -EIO;
dev_err(&client->dev, "Failed to read from address 0x%04X: %d\n",
reg, ret);
return ret;
}
static int iqs5xx_read_word(struct i2c_client *client, u16 reg, u16 *val)
{
__be16 val_buf;
int error;
error = iqs5xx_read_burst(client, reg, &val_buf, sizeof(val_buf));
if (error)
return error;
*val = be16_to_cpu(val_buf);
return 0;
}
static int iqs5xx_write_burst(struct i2c_client *client,
u16 reg, const void *val, u16 len)
{
int ret, i;
u16 mlen = sizeof(reg) + len;
u8 mbuf[sizeof(reg) + IQS5XX_WR_BYTES_MAX];
if (len > IQS5XX_WR_BYTES_MAX)
return -EINVAL;
put_unaligned_be16(reg, mbuf);
memcpy(mbuf + sizeof(reg), val, len);
/*
* The first addressing attempt outside of a communication window fails
* and must be retried, after which the device clock stretches until it
* is available.
*/
for (i = 0; i < IQS5XX_NUM_RETRIES; i++) {
ret = i2c_master_send(client, mbuf, mlen);
if (ret == mlen)
return 0;
usleep_range(200, 300);
}
if (ret >= 0)
ret = -EIO;
dev_err(&client->dev, "Failed to write to address 0x%04X: %d\n",
reg, ret);
return ret;
}
static int iqs5xx_write_word(struct i2c_client *client, u16 reg, u16 val)
{
__be16 val_buf = cpu_to_be16(val);
return iqs5xx_write_burst(client, reg, &val_buf, sizeof(val_buf));
}
static int iqs5xx_write_byte(struct i2c_client *client, u16 reg, u8 val)
{
return iqs5xx_write_burst(client, reg, &val, sizeof(val));
}
static void iqs5xx_reset(struct i2c_client *client)
{
struct iqs5xx_private *iqs5xx = i2c_get_clientdata(client);
gpiod_set_value_cansleep(iqs5xx->reset_gpio, 1);
usleep_range(200, 300);
gpiod_set_value_cansleep(iqs5xx->reset_gpio, 0);
}
static int iqs5xx_bl_cmd(struct i2c_client *client, u8 bl_cmd, u16 bl_addr)
{
struct i2c_msg msg;
int ret;
u8 mbuf[sizeof(bl_cmd) + sizeof(bl_addr)];
msg.addr = client->addr ^ IQS5XX_BL_ADDR_MASK;
msg.flags = 0;
msg.len = sizeof(bl_cmd);
msg.buf = mbuf;
*mbuf = bl_cmd;
switch (bl_cmd) {
case IQS5XX_BL_CMD_VER:
case IQS5XX_BL_CMD_CRC:
case IQS5XX_BL_CMD_EXEC:
break;
case IQS5XX_BL_CMD_READ:
msg.len += sizeof(bl_addr);
put_unaligned_be16(bl_addr, mbuf + sizeof(bl_cmd));
break;
default:
return -EINVAL;
}
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret != 1)
goto msg_fail;
switch (bl_cmd) {
case IQS5XX_BL_CMD_VER:
msg.len = sizeof(u16);
break;
case IQS5XX_BL_CMD_CRC:
msg.len = sizeof(u8);
/*
* This delay saves the bus controller the trouble of having to
* tolerate a relatively long clock-stretching period while the
* CRC is calculated.
*/
msleep(50);
break;
case IQS5XX_BL_CMD_EXEC:
usleep_range(10000, 10100);
fallthrough;
default:
return 0;
}
msg.flags = I2C_M_RD;
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret != 1)
goto msg_fail;
if (bl_cmd == IQS5XX_BL_CMD_VER &&
get_unaligned_be16(mbuf) != IQS5XX_BL_ID) {
dev_err(&client->dev, "Unrecognized bootloader ID: 0x%04X\n",
get_unaligned_be16(mbuf));
return -EINVAL;
}
if (bl_cmd == IQS5XX_BL_CMD_CRC && *mbuf != IQS5XX_BL_CRC_PASS) {
dev_err(&client->dev, "Bootloader CRC failed\n");
return -EIO;
}
return 0;
msg_fail:
if (ret >= 0)
ret = -EIO;
if (bl_cmd != IQS5XX_BL_CMD_VER)
dev_err(&client->dev,
"Unsuccessful bootloader command 0x%02X: %d\n",
bl_cmd, ret);
return ret;
}
static int iqs5xx_bl_open(struct i2c_client *client)
{
int error, i, j;
/*
* The device opens a bootloader polling window for 2 ms following the
* release of reset. If the host cannot establish communication during
* this time frame, it must cycle reset again.
*/
for (i = 0; i < IQS5XX_BL_ATTEMPTS; i++) {
iqs5xx_reset(client);
usleep_range(350, 400);
for (j = 0; j < IQS5XX_NUM_RETRIES; j++) {
error = iqs5xx_bl_cmd(client, IQS5XX_BL_CMD_VER, 0);
if (!error)
usleep_range(10000, 10100);
else if (error != -EINVAL)
continue;
return error;
}
}
dev_err(&client->dev, "Failed to open bootloader: %d\n", error);
return error;
}
static int iqs5xx_bl_write(struct i2c_client *client,
u16 bl_addr, u8 *pmap_data, u16 pmap_len)
{
struct i2c_msg msg;
int ret, i;
u8 mbuf[sizeof(bl_addr) + IQS5XX_BL_BLK_LEN_MAX];
if (pmap_len % IQS5XX_BL_BLK_LEN_MAX)
return -EINVAL;
msg.addr = client->addr ^ IQS5XX_BL_ADDR_MASK;
msg.flags = 0;
msg.len = sizeof(mbuf);
msg.buf = mbuf;
for (i = 0; i < pmap_len; i += IQS5XX_BL_BLK_LEN_MAX) {
put_unaligned_be16(bl_addr + i, mbuf);
memcpy(mbuf + sizeof(bl_addr), pmap_data + i,
sizeof(mbuf) - sizeof(bl_addr));
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret != 1)
goto msg_fail;
usleep_range(10000, 10100);
}
return 0;
msg_fail:
if (ret >= 0)
ret = -EIO;
dev_err(&client->dev, "Failed to write block at address 0x%04X: %d\n",
bl_addr + i, ret);
return ret;
}
static int iqs5xx_bl_verify(struct i2c_client *client,
u16 bl_addr, u8 *pmap_data, u16 pmap_len)
{
struct i2c_msg msg;
int ret, i;
u8 bl_data[IQS5XX_BL_BLK_LEN_MAX];
if (pmap_len % IQS5XX_BL_BLK_LEN_MAX)
return -EINVAL;
msg.addr = client->addr ^ IQS5XX_BL_ADDR_MASK;
msg.flags = I2C_M_RD;
msg.len = sizeof(bl_data);
msg.buf = bl_data;
for (i = 0; i < pmap_len; i += IQS5XX_BL_BLK_LEN_MAX) {
ret = iqs5xx_bl_cmd(client, IQS5XX_BL_CMD_READ, bl_addr + i);
if (ret)
return ret;
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret != 1)
goto msg_fail;
if (memcmp(bl_data, pmap_data + i, sizeof(bl_data))) {
dev_err(&client->dev,
"Failed to verify block at address 0x%04X\n",
bl_addr + i);
return -EIO;
}
}
return 0;
msg_fail:
if (ret >= 0)
ret = -EIO;
dev_err(&client->dev, "Failed to read block at address 0x%04X: %d\n",
bl_addr + i, ret);
return ret;
}
static int iqs5xx_set_state(struct i2c_client *client, u8 state)
{
struct iqs5xx_private *iqs5xx = i2c_get_clientdata(client);
int error1, error2;
if (!iqs5xx->dev_id_info.bl_status)
return 0;
mutex_lock(&iqs5xx->lock);
/*
* Addressing the device outside of a communication window prompts it
* to assert the RDY output, so disable the interrupt line to prevent
* the handler from servicing a false interrupt.
*/
disable_irq(client->irq);
error1 = iqs5xx_write_byte(client, IQS5XX_SYS_CTRL1, state);
error2 = iqs5xx_write_byte(client, IQS5XX_END_COMM, 0);
usleep_range(50, 100);
enable_irq(client->irq);
mutex_unlock(&iqs5xx->lock);
if (error1)
return error1;
return error2;
}
static int iqs5xx_open(struct input_dev *input)
{
struct iqs5xx_private *iqs5xx = input_get_drvdata(input);
return iqs5xx_set_state(iqs5xx->client, IQS5XX_RESUME);
}
static void iqs5xx_close(struct input_dev *input)
{
struct iqs5xx_private *iqs5xx = input_get_drvdata(input);
iqs5xx_set_state(iqs5xx->client, IQS5XX_SUSPEND);
}
static int iqs5xx_axis_init(struct i2c_client *client)
{
struct iqs5xx_private *iqs5xx = i2c_get_clientdata(client);
struct touchscreen_properties *prop = &iqs5xx->prop;
struct input_dev *input = iqs5xx->input;
u16 max_x, max_y;
int error;
if (!input) {
input = devm_input_allocate_device(&client->dev);
if (!input)
return -ENOMEM;
input->name = client->name;
input->id.bustype = BUS_I2C;
input->open = iqs5xx_open;
input->close = iqs5xx_close;
input_set_drvdata(input, iqs5xx);
iqs5xx->input = input;
}
error = iqs5xx_read_word(client, IQS5XX_X_RES, &max_x);
if (error)
return error;
error = iqs5xx_read_word(client, IQS5XX_Y_RES, &max_y);
if (error)
return error;
input_set_abs_params(input, ABS_MT_POSITION_X, 0, max_x, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0, max_y, 0, 0);
input_set_abs_params(input, ABS_MT_PRESSURE, 0, U16_MAX, 0, 0);
touchscreen_parse_properties(input, true, prop);
/*
* The device reserves 0xFFFF for coordinates that correspond to slots
* which are not in a state of touch.
*/
if (prop->max_x >= U16_MAX || prop->max_y >= U16_MAX) {
dev_err(&client->dev, "Invalid touchscreen size: %u*%u\n",
prop->max_x, prop->max_y);
return -EINVAL;
}
if (prop->max_x != max_x) {
error = iqs5xx_write_word(client, IQS5XX_X_RES, prop->max_x);
if (error)
return error;
}
if (prop->max_y != max_y) {
error = iqs5xx_write_word(client, IQS5XX_Y_RES, prop->max_y);
if (error)
return error;
}
error = input_mt_init_slots(input, IQS5XX_NUM_CONTACTS,
INPUT_MT_DIRECT);
if (error)
dev_err(&client->dev, "Failed to initialize slots: %d\n",
error);
return error;
}
static int iqs5xx_dev_init(struct i2c_client *client)
{
struct iqs5xx_private *iqs5xx = i2c_get_clientdata(client);
struct iqs5xx_dev_id_info *dev_id_info;
int error;
u8 buf[sizeof(*dev_id_info) + 1];
error = iqs5xx_read_burst(client, IQS5XX_PROD_NUM,
&buf[1], sizeof(*dev_id_info));
if (error)
return iqs5xx_bl_open(client);
/*
* A000 and B000 devices use 8-bit and 16-bit addressing, respectively.
* Querying an A000 device's version information with 16-bit addressing
* gives the appearance that the data is shifted by one byte; a nonzero
* leading array element suggests this could be the case (in which case
* the missing zero is prepended).
*/
buf[0] = 0;
dev_id_info = (struct iqs5xx_dev_id_info *)&buf[buf[1] ? 0 : 1];
switch (be16_to_cpu(dev_id_info->prod_num)) {
case IQS5XX_PROD_NUM_IQS550:
case IQS5XX_PROD_NUM_IQS572:
case IQS5XX_PROD_NUM_IQS525:
break;
default:
dev_err(&client->dev, "Unrecognized product number: %u\n",
be16_to_cpu(dev_id_info->prod_num));
return -EINVAL;
}
/*
* With the product number recognized yet shifted by one byte, open the
* bootloader and wait for user space to convert the A000 device into a
* B000 device via new firmware.
*/
if (buf[1]) {
dev_err(&client->dev, "Opening bootloader for A000 device\n");
return iqs5xx_bl_open(client);
}
error = iqs5xx_read_burst(client, IQS5XX_EXP_FILE,
iqs5xx->exp_file, sizeof(iqs5xx->exp_file));
if (error)
return error;
error = iqs5xx_axis_init(client);
if (error)
return error;
error = iqs5xx_write_byte(client, IQS5XX_SYS_CTRL0, IQS5XX_ACK_RESET);
if (error)
return error;
error = iqs5xx_write_byte(client, IQS5XX_SYS_CFG0,
IQS5XX_SETUP_COMPLETE | IQS5XX_WDT |
IQS5XX_ALP_REATI | IQS5XX_REATI);
if (error)
return error;
error = iqs5xx_write_byte(client, IQS5XX_SYS_CFG1,
IQS5XX_TP_EVENT | IQS5XX_EVENT_MODE);
if (error)
return error;
error = iqs5xx_write_byte(client, IQS5XX_END_COMM, 0);
if (error)
return error;
iqs5xx->dev_id_info = *dev_id_info;
/*
* The following delay allows ATI to complete before the open and close
* callbacks are free to elicit I2C communication. Any attempts to read
* from or write to the device during this time may face extended clock
* stretching and prompt the I2C controller to report an error.
*/
msleep(250);
return 0;
}
static irqreturn_t iqs5xx_irq(int irq, void *data)
{
struct iqs5xx_private *iqs5xx = data;
struct iqs5xx_status status;
struct i2c_client *client = iqs5xx->client;
struct input_dev *input = iqs5xx->input;
int error, i;
/*
* This check is purely a precaution, as the device does not assert the
* RDY output during bootloader mode. If the device operates outside of
* bootloader mode, the input device is guaranteed to be allocated.
*/
if (!iqs5xx->dev_id_info.bl_status)
return IRQ_NONE;
error = iqs5xx_read_burst(client, IQS5XX_SYS_INFO0,
&status, sizeof(status));
if (error)
return IRQ_NONE;
if (status.sys_info[0] & IQS5XX_SHOW_RESET) {
dev_err(&client->dev, "Unexpected device reset\n");
error = iqs5xx_dev_init(client);
if (error) {
dev_err(&client->dev,
"Failed to re-initialize device: %d\n", error);
return IRQ_NONE;
}
return IRQ_HANDLED;
}
for (i = 0; i < ARRAY_SIZE(status.touch_data); i++) {
struct iqs5xx_touch_data *touch_data = &status.touch_data[i];
u16 pressure = be16_to_cpu(touch_data->strength);
input_mt_slot(input, i);
if (input_mt_report_slot_state(input, MT_TOOL_FINGER,
pressure != 0)) {
touchscreen_report_pos(input, &iqs5xx->prop,
be16_to_cpu(touch_data->abs_x),
be16_to_cpu(touch_data->abs_y),
true);
input_report_abs(input, ABS_MT_PRESSURE, pressure);
}
}
input_mt_sync_frame(input);
input_sync(input);
error = iqs5xx_write_byte(client, IQS5XX_END_COMM, 0);
if (error)
return IRQ_NONE;
/*
* Once the communication window is closed, a small delay is added to
* ensure the device's RDY output has been deasserted by the time the
* interrupt handler returns.
*/
usleep_range(50, 100);
return IRQ_HANDLED;
}
static int iqs5xx_fw_file_parse(struct i2c_client *client,
const char *fw_file, u8 *pmap)
{
const struct firmware *fw;
struct iqs5xx_ihex_rec *rec;
size_t pos = 0;
int error, i;
u16 rec_num = 1;
u16 rec_addr;
u8 rec_len, rec_type, rec_chksm, chksm;
u8 rec_hdr[IQS5XX_REC_HDR_LEN];
u8 rec_data[IQS5XX_REC_LEN_MAX];
/*
* Firmware exported from the vendor's configuration tool deviates from
* standard ihex as follows: (1) the checksum for records corresponding
* to user-exported settings is not recalculated, and (2) an address of
* 0xFFFF is used for the EOF record.
*
* Because the ihex2fw tool tolerates neither (1) nor (2), the slightly
* nonstandard ihex firmware is parsed directly by the driver.
*/
error = request_firmware(&fw, fw_file, &client->dev);
if (error) {
dev_err(&client->dev, "Failed to request firmware %s: %d\n",
fw_file, error);
return error;
}
do {
if (pos + sizeof(*rec) > fw->size) {
dev_err(&client->dev, "Insufficient firmware size\n");
error = -EINVAL;
break;
}
rec = (struct iqs5xx_ihex_rec *)(fw->data + pos);
pos += sizeof(*rec);
if (rec->start != ':') {
dev_err(&client->dev, "Invalid start at record %u\n",
rec_num);
error = -EINVAL;
break;
}
error = hex2bin(rec_hdr, rec->len, sizeof(rec_hdr));
if (error) {
dev_err(&client->dev, "Invalid header at record %u\n",
rec_num);
break;
}
rec_len = *rec_hdr;
rec_addr = get_unaligned_be16(rec_hdr + sizeof(rec_len));
rec_type = *(rec_hdr + sizeof(rec_len) + sizeof(rec_addr));
if (pos + rec_len * 2 > fw->size) {
dev_err(&client->dev, "Insufficient firmware size\n");
error = -EINVAL;
break;
}
pos += (rec_len * 2);
error = hex2bin(rec_data, rec->data, rec_len);
if (error) {
dev_err(&client->dev, "Invalid data at record %u\n",
rec_num);
break;
}
error = hex2bin(&rec_chksm,
rec->data + rec_len * 2, sizeof(rec_chksm));
if (error) {
dev_err(&client->dev, "Invalid checksum at record %u\n",
rec_num);
break;
}
chksm = 0;
for (i = 0; i < sizeof(rec_hdr); i++)
chksm += rec_hdr[i];
for (i = 0; i < rec_len; i++)
chksm += rec_data[i];
chksm = ~chksm + 1;
if (chksm != rec_chksm && rec_addr < IQS5XX_CSTM) {
dev_err(&client->dev,
"Incorrect checksum at record %u\n",
rec_num);
error = -EINVAL;
break;
}
switch (rec_type) {
case IQS5XX_REC_TYPE_DATA:
if (rec_addr < IQS5XX_CHKSM ||
rec_addr > IQS5XX_PMAP_END) {
dev_err(&client->dev,
"Invalid address at record %u\n",
rec_num);
error = -EINVAL;
} else {
memcpy(pmap + rec_addr - IQS5XX_CHKSM,
rec_data, rec_len);
}
break;
case IQS5XX_REC_TYPE_EOF:
break;
default:
dev_err(&client->dev, "Invalid type at record %u\n",
rec_num);
error = -EINVAL;
}
if (error)
break;
rec_num++;
while (pos < fw->size) {
if (*(fw->data + pos) == ':')
break;
pos++;
}
} while (rec_type != IQS5XX_REC_TYPE_EOF);
release_firmware(fw);
return error;
}
static int iqs5xx_fw_file_write(struct i2c_client *client, const char *fw_file)
{
struct iqs5xx_private *iqs5xx = i2c_get_clientdata(client);
int error, error_init = 0;
u8 *pmap;
pmap = kzalloc(IQS5XX_PMAP_LEN, GFP_KERNEL);
if (!pmap)
return -ENOMEM;
error = iqs5xx_fw_file_parse(client, fw_file, pmap);
if (error)
goto err_kfree;
mutex_lock(&iqs5xx->lock);
/*
* Disable the interrupt line in case the first attempt(s) to enter the
* bootloader don't happen quickly enough, in which case the device may
* assert the RDY output until the next attempt.
*/
disable_irq(client->irq);
iqs5xx->dev_id_info.bl_status = 0;
error = iqs5xx_bl_cmd(client, IQS5XX_BL_CMD_VER, 0);
if (error) {
error = iqs5xx_bl_open(client);
if (error)
goto err_reset;
}
error = iqs5xx_bl_write(client, IQS5XX_CHKSM, pmap, IQS5XX_PMAP_LEN);
if (error)
goto err_reset;
error = iqs5xx_bl_cmd(client, IQS5XX_BL_CMD_CRC, 0);
if (error)
goto err_reset;
error = iqs5xx_bl_verify(client, IQS5XX_CSTM,
pmap + IQS5XX_CHKSM_LEN + IQS5XX_APP_LEN,
IQS5XX_CSTM_LEN);
err_reset:
iqs5xx_reset(client);
usleep_range(15000, 15100);
error_init = iqs5xx_dev_init(client);
if (!iqs5xx->dev_id_info.bl_status)
error_init = error_init ? : -EINVAL;
enable_irq(client->irq);
mutex_unlock(&iqs5xx->lock);
err_kfree:
kfree(pmap);
return error ? : error_init;
}
static ssize_t fw_file_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct iqs5xx_private *iqs5xx = dev_get_drvdata(dev);
struct i2c_client *client = iqs5xx->client;
size_t len = count;
bool input_reg = !iqs5xx->input;
char fw_file[IQS5XX_FW_FILE_LEN + 1];
int error;
if (!len)
return -EINVAL;
if (buf[len - 1] == '\n')
len--;
if (len > IQS5XX_FW_FILE_LEN)
return -ENAMETOOLONG;
memcpy(fw_file, buf, len);
fw_file[len] = '\0';
error = iqs5xx_fw_file_write(client, fw_file);
if (error)
return error;
/*
* If the input device was not allocated already, it is guaranteed to
* be allocated by this point and can finally be registered.
*/
if (input_reg) {
error = input_register_device(iqs5xx->input);
if (error) {
dev_err(&client->dev,
"Failed to register device: %d\n",
error);
return error;
}
}
return count;
}
static ssize_t fw_info_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct iqs5xx_private *iqs5xx = dev_get_drvdata(dev);
if (!iqs5xx->dev_id_info.bl_status)
return -ENODATA;
return scnprintf(buf, PAGE_SIZE, "%u.%u.%u.%u:%u.%u\n",
be16_to_cpu(iqs5xx->dev_id_info.prod_num),
be16_to_cpu(iqs5xx->dev_id_info.proj_num),
iqs5xx->dev_id_info.major_ver,
iqs5xx->dev_id_info.minor_ver,
iqs5xx->exp_file[0], iqs5xx->exp_file[1]);
}
static DEVICE_ATTR_WO(fw_file);
static DEVICE_ATTR_RO(fw_info);
static struct attribute *iqs5xx_attrs[] = {
&dev_attr_fw_file.attr,
&dev_attr_fw_info.attr,
NULL,
};
static umode_t iqs5xx_attr_is_visible(struct kobject *kobj,
struct attribute *attr, int i)
{
struct device *dev = kobj_to_dev(kobj);
struct iqs5xx_private *iqs5xx = dev_get_drvdata(dev);
if (attr == &dev_attr_fw_file.attr &&
(iqs5xx->dev_id_info.bl_status == IQS5XX_BL_STATUS_NONE ||
!iqs5xx->reset_gpio))
return 0;
return attr->mode;
}
static const struct attribute_group iqs5xx_attr_group = {
.is_visible = iqs5xx_attr_is_visible,
.attrs = iqs5xx_attrs,
};
static int iqs5xx_suspend(struct device *dev)
{
struct iqs5xx_private *iqs5xx = dev_get_drvdata(dev);
struct input_dev *input = iqs5xx->input;
int error = 0;
if (!input || device_may_wakeup(dev))
return error;
mutex_lock(&input->mutex);
if (input_device_enabled(input))
error = iqs5xx_set_state(iqs5xx->client, IQS5XX_SUSPEND);
mutex_unlock(&input->mutex);
return error;
}
static int iqs5xx_resume(struct device *dev)
{
struct iqs5xx_private *iqs5xx = dev_get_drvdata(dev);
struct input_dev *input = iqs5xx->input;
int error = 0;
if (!input || device_may_wakeup(dev))
return error;
mutex_lock(&input->mutex);
if (input_device_enabled(input))
error = iqs5xx_set_state(iqs5xx->client, IQS5XX_RESUME);
mutex_unlock(&input->mutex);
return error;
}
static DEFINE_SIMPLE_DEV_PM_OPS(iqs5xx_pm, iqs5xx_suspend, iqs5xx_resume);
static int iqs5xx_probe(struct i2c_client *client)
{
struct iqs5xx_private *iqs5xx;
int error;
iqs5xx = devm_kzalloc(&client->dev, sizeof(*iqs5xx), GFP_KERNEL);
if (!iqs5xx)
return -ENOMEM;
i2c_set_clientdata(client, iqs5xx);
iqs5xx->client = client;
iqs5xx->reset_gpio = devm_gpiod_get_optional(&client->dev,
"reset", GPIOD_OUT_LOW);
if (IS_ERR(iqs5xx->reset_gpio)) {
error = PTR_ERR(iqs5xx->reset_gpio);
dev_err(&client->dev, "Failed to request GPIO: %d\n", error);
return error;
}
mutex_init(&iqs5xx->lock);
error = iqs5xx_dev_init(client);
if (error)
return error;
error = devm_request_threaded_irq(&client->dev, client->irq,
NULL, iqs5xx_irq, IRQF_ONESHOT,
client->name, iqs5xx);
if (error) {
dev_err(&client->dev, "Failed to request IRQ: %d\n", error);
return error;
}
error = devm_device_add_group(&client->dev, &iqs5xx_attr_group);
if (error) {
dev_err(&client->dev, "Failed to add attributes: %d\n", error);
return error;
}
if (iqs5xx->input) {
error = input_register_device(iqs5xx->input);
if (error)
dev_err(&client->dev,
"Failed to register device: %d\n",
error);
}
return error;
}
static const struct i2c_device_id iqs5xx_id[] = {
{ "iqs550", 0 },
{ "iqs572", 1 },
{ "iqs525", 2 },
{ }
};
MODULE_DEVICE_TABLE(i2c, iqs5xx_id);
static const struct of_device_id iqs5xx_of_match[] = {
{ .compatible = "azoteq,iqs550" },
{ .compatible = "azoteq,iqs572" },
{ .compatible = "azoteq,iqs525" },
{ }
};
MODULE_DEVICE_TABLE(of, iqs5xx_of_match);
static struct i2c_driver iqs5xx_i2c_driver = {
.driver = {
.name = "iqs5xx",
.of_match_table = iqs5xx_of_match,
.pm = pm_sleep_ptr(&iqs5xx_pm),
},
.id_table = iqs5xx_id,
.probe = iqs5xx_probe,
};
module_i2c_driver(iqs5xx_i2c_driver);
MODULE_AUTHOR("Jeff LaBundy <[email protected]>");
MODULE_DESCRIPTION("Azoteq IQS550/572/525 Trackpad/Touchscreen Controller");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/touchscreen/iqs5xx.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2012-2016 Synaptics Incorporated
*/
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/rmi.h>
#include "rmi_driver.h"
#include "rmi_2d_sensor.h"
enum rmi_f12_object_type {
RMI_F12_OBJECT_NONE = 0x00,
RMI_F12_OBJECT_FINGER = 0x01,
RMI_F12_OBJECT_STYLUS = 0x02,
RMI_F12_OBJECT_PALM = 0x03,
RMI_F12_OBJECT_UNCLASSIFIED = 0x04,
RMI_F12_OBJECT_GLOVED_FINGER = 0x06,
RMI_F12_OBJECT_NARROW_OBJECT = 0x07,
RMI_F12_OBJECT_HAND_EDGE = 0x08,
RMI_F12_OBJECT_COVER = 0x0A,
RMI_F12_OBJECT_STYLUS_2 = 0x0B,
RMI_F12_OBJECT_ERASER = 0x0C,
RMI_F12_OBJECT_SMALL_OBJECT = 0x0D,
};
#define F12_DATA1_BYTES_PER_OBJ 8
struct f12_data {
struct rmi_2d_sensor sensor;
struct rmi_2d_sensor_platform_data sensor_pdata;
bool has_dribble;
u16 data_addr;
struct rmi_register_descriptor query_reg_desc;
struct rmi_register_descriptor control_reg_desc;
struct rmi_register_descriptor data_reg_desc;
/* F12 Data1 describes sensed objects */
const struct rmi_register_desc_item *data1;
u16 data1_offset;
/* F12 Data5 describes finger ACM */
const struct rmi_register_desc_item *data5;
u16 data5_offset;
/* F12 Data5 describes Pen */
const struct rmi_register_desc_item *data6;
u16 data6_offset;
/* F12 Data9 reports relative data */
const struct rmi_register_desc_item *data9;
u16 data9_offset;
const struct rmi_register_desc_item *data15;
u16 data15_offset;
unsigned long *abs_mask;
unsigned long *rel_mask;
};
static int rmi_f12_read_sensor_tuning(struct f12_data *f12)
{
const struct rmi_register_desc_item *item;
struct rmi_2d_sensor *sensor = &f12->sensor;
struct rmi_function *fn = sensor->fn;
struct rmi_device *rmi_dev = fn->rmi_dev;
int ret;
int offset;
u8 buf[15];
int pitch_x = 0;
int pitch_y = 0;
int rx_receivers = 0;
int tx_receivers = 0;
item = rmi_get_register_desc_item(&f12->control_reg_desc, 8);
if (!item) {
dev_err(&fn->dev,
"F12 does not have the sensor tuning control register\n");
return -ENODEV;
}
offset = rmi_register_desc_calc_reg_offset(&f12->control_reg_desc, 8);
if (item->reg_size > sizeof(buf)) {
dev_err(&fn->dev,
"F12 control8 should be no bigger than %zd bytes, not: %ld\n",
sizeof(buf), item->reg_size);
return -ENODEV;
}
ret = rmi_read_block(rmi_dev, fn->fd.control_base_addr + offset, buf,
item->reg_size);
if (ret)
return ret;
offset = 0;
if (rmi_register_desc_has_subpacket(item, 0)) {
sensor->max_x = (buf[offset + 1] << 8) | buf[offset];
sensor->max_y = (buf[offset + 3] << 8) | buf[offset + 2];
offset += 4;
}
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: max_x: %d max_y: %d\n", __func__,
sensor->max_x, sensor->max_y);
if (rmi_register_desc_has_subpacket(item, 1)) {
pitch_x = (buf[offset + 1] << 8) | buf[offset];
pitch_y = (buf[offset + 3] << 8) | buf[offset + 2];
offset += 4;
}
if (rmi_register_desc_has_subpacket(item, 2)) {
/* Units 1/128 sensor pitch */
rmi_dbg(RMI_DEBUG_FN, &fn->dev,
"%s: Inactive Border xlo:%d xhi:%d ylo:%d yhi:%d\n",
__func__,
buf[offset], buf[offset + 1],
buf[offset + 2], buf[offset + 3]);
offset += 4;
}
if (rmi_register_desc_has_subpacket(item, 3)) {
rx_receivers = buf[offset];
tx_receivers = buf[offset + 1];
offset += 2;
}
/* Skip over sensor flags */
if (rmi_register_desc_has_subpacket(item, 4))
offset += 1;
sensor->x_mm = (pitch_x * rx_receivers) >> 12;
sensor->y_mm = (pitch_y * tx_receivers) >> 12;
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: x_mm: %d y_mm: %d\n", __func__,
sensor->x_mm, sensor->y_mm);
return 0;
}
static void rmi_f12_process_objects(struct f12_data *f12, u8 *data1, int size)
{
int i;
struct rmi_2d_sensor *sensor = &f12->sensor;
int objects = f12->data1->num_subpackets;
if ((f12->data1->num_subpackets * F12_DATA1_BYTES_PER_OBJ) > size)
objects = size / F12_DATA1_BYTES_PER_OBJ;
for (i = 0; i < objects; i++) {
struct rmi_2d_sensor_abs_object *obj = &sensor->objs[i];
obj->type = RMI_2D_OBJECT_NONE;
obj->mt_tool = MT_TOOL_FINGER;
switch (data1[0]) {
case RMI_F12_OBJECT_FINGER:
obj->type = RMI_2D_OBJECT_FINGER;
break;
case RMI_F12_OBJECT_STYLUS:
obj->type = RMI_2D_OBJECT_STYLUS;
obj->mt_tool = MT_TOOL_PEN;
break;
case RMI_F12_OBJECT_PALM:
obj->type = RMI_2D_OBJECT_PALM;
obj->mt_tool = MT_TOOL_PALM;
break;
case RMI_F12_OBJECT_UNCLASSIFIED:
obj->type = RMI_2D_OBJECT_UNCLASSIFIED;
break;
}
obj->x = (data1[2] << 8) | data1[1];
obj->y = (data1[4] << 8) | data1[3];
obj->z = data1[5];
obj->wx = data1[6];
obj->wy = data1[7];
rmi_2d_sensor_abs_process(sensor, obj, i);
data1 += F12_DATA1_BYTES_PER_OBJ;
}
if (sensor->kernel_tracking)
input_mt_assign_slots(sensor->input,
sensor->tracking_slots,
sensor->tracking_pos,
sensor->nbr_fingers,
sensor->dmax);
for (i = 0; i < objects; i++)
rmi_2d_sensor_abs_report(sensor, &sensor->objs[i], i);
}
static irqreturn_t rmi_f12_attention(int irq, void *ctx)
{
int retval;
struct rmi_function *fn = ctx;
struct rmi_device *rmi_dev = fn->rmi_dev;
struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev);
struct f12_data *f12 = dev_get_drvdata(&fn->dev);
struct rmi_2d_sensor *sensor = &f12->sensor;
int valid_bytes = sensor->pkt_size;
if (drvdata->attn_data.data) {
if (sensor->attn_size > drvdata->attn_data.size)
valid_bytes = drvdata->attn_data.size;
else
valid_bytes = sensor->attn_size;
memcpy(sensor->data_pkt, drvdata->attn_data.data,
valid_bytes);
drvdata->attn_data.data += valid_bytes;
drvdata->attn_data.size -= valid_bytes;
} else {
retval = rmi_read_block(rmi_dev, f12->data_addr,
sensor->data_pkt, sensor->pkt_size);
if (retval < 0) {
dev_err(&fn->dev, "Failed to read object data. Code: %d.\n",
retval);
return IRQ_RETVAL(retval);
}
}
if (f12->data1)
rmi_f12_process_objects(f12,
&sensor->data_pkt[f12->data1_offset], valid_bytes);
input_mt_sync_frame(sensor->input);
return IRQ_HANDLED;
}
static int rmi_f12_write_control_regs(struct rmi_function *fn)
{
int ret;
const struct rmi_register_desc_item *item;
struct rmi_device *rmi_dev = fn->rmi_dev;
struct f12_data *f12 = dev_get_drvdata(&fn->dev);
int control_size;
char buf[3];
u16 control_offset = 0;
u8 subpacket_offset = 0;
if (f12->has_dribble
&& (f12->sensor.dribble != RMI_REG_STATE_DEFAULT)) {
item = rmi_get_register_desc_item(&f12->control_reg_desc, 20);
if (item) {
control_offset = rmi_register_desc_calc_reg_offset(
&f12->control_reg_desc, 20);
/*
* The byte containing the EnableDribble bit will be
* in either byte 0 or byte 2 of control 20. Depending
* on the existence of subpacket 0. If control 20 is
* larger then 3 bytes, just read the first 3.
*/
control_size = min(item->reg_size, 3UL);
ret = rmi_read_block(rmi_dev, fn->fd.control_base_addr
+ control_offset, buf, control_size);
if (ret)
return ret;
if (rmi_register_desc_has_subpacket(item, 0))
subpacket_offset += 1;
switch (f12->sensor.dribble) {
case RMI_REG_STATE_OFF:
buf[subpacket_offset] &= ~BIT(2);
break;
case RMI_REG_STATE_ON:
buf[subpacket_offset] |= BIT(2);
break;
case RMI_REG_STATE_DEFAULT:
default:
break;
}
ret = rmi_write_block(rmi_dev,
fn->fd.control_base_addr + control_offset,
buf, control_size);
if (ret)
return ret;
}
}
return 0;
}
static int rmi_f12_config(struct rmi_function *fn)
{
struct rmi_driver *drv = fn->rmi_dev->driver;
struct f12_data *f12 = dev_get_drvdata(&fn->dev);
struct rmi_2d_sensor *sensor;
int ret;
sensor = &f12->sensor;
if (!sensor->report_abs)
drv->clear_irq_bits(fn->rmi_dev, f12->abs_mask);
else
drv->set_irq_bits(fn->rmi_dev, f12->abs_mask);
drv->clear_irq_bits(fn->rmi_dev, f12->rel_mask);
ret = rmi_f12_write_control_regs(fn);
if (ret)
dev_warn(&fn->dev,
"Failed to write F12 control registers: %d\n", ret);
return 0;
}
static int rmi_f12_probe(struct rmi_function *fn)
{
struct f12_data *f12;
int ret;
struct rmi_device *rmi_dev = fn->rmi_dev;
char buf;
u16 query_addr = fn->fd.query_base_addr;
const struct rmi_register_desc_item *item;
struct rmi_2d_sensor *sensor;
struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);
struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev);
u16 data_offset = 0;
int mask_size;
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s\n", __func__);
mask_size = BITS_TO_LONGS(drvdata->irq_count) * sizeof(unsigned long);
ret = rmi_read(fn->rmi_dev, query_addr, &buf);
if (ret < 0) {
dev_err(&fn->dev, "Failed to read general info register: %d\n",
ret);
return -ENODEV;
}
++query_addr;
if (!(buf & BIT(0))) {
dev_err(&fn->dev,
"Behavior of F12 without register descriptors is undefined.\n");
return -ENODEV;
}
f12 = devm_kzalloc(&fn->dev, sizeof(struct f12_data) + mask_size * 2,
GFP_KERNEL);
if (!f12)
return -ENOMEM;
f12->abs_mask = (unsigned long *)((char *)f12
+ sizeof(struct f12_data));
f12->rel_mask = (unsigned long *)((char *)f12
+ sizeof(struct f12_data) + mask_size);
set_bit(fn->irq_pos, f12->abs_mask);
set_bit(fn->irq_pos + 1, f12->rel_mask);
f12->has_dribble = !!(buf & BIT(3));
if (fn->dev.of_node) {
ret = rmi_2d_sensor_of_probe(&fn->dev, &f12->sensor_pdata);
if (ret)
return ret;
} else {
f12->sensor_pdata = pdata->sensor_pdata;
}
ret = rmi_read_register_desc(rmi_dev, query_addr,
&f12->query_reg_desc);
if (ret) {
dev_err(&fn->dev,
"Failed to read the Query Register Descriptor: %d\n",
ret);
return ret;
}
query_addr += 3;
ret = rmi_read_register_desc(rmi_dev, query_addr,
&f12->control_reg_desc);
if (ret) {
dev_err(&fn->dev,
"Failed to read the Control Register Descriptor: %d\n",
ret);
return ret;
}
query_addr += 3;
ret = rmi_read_register_desc(rmi_dev, query_addr,
&f12->data_reg_desc);
if (ret) {
dev_err(&fn->dev,
"Failed to read the Data Register Descriptor: %d\n",
ret);
return ret;
}
query_addr += 3;
sensor = &f12->sensor;
sensor->fn = fn;
f12->data_addr = fn->fd.data_base_addr;
sensor->pkt_size = rmi_register_desc_calc_size(&f12->data_reg_desc);
sensor->axis_align =
f12->sensor_pdata.axis_align;
sensor->x_mm = f12->sensor_pdata.x_mm;
sensor->y_mm = f12->sensor_pdata.y_mm;
sensor->dribble = f12->sensor_pdata.dribble;
if (sensor->sensor_type == rmi_sensor_default)
sensor->sensor_type =
f12->sensor_pdata.sensor_type;
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: data packet size: %d\n", __func__,
sensor->pkt_size);
sensor->data_pkt = devm_kzalloc(&fn->dev, sensor->pkt_size, GFP_KERNEL);
if (!sensor->data_pkt)
return -ENOMEM;
dev_set_drvdata(&fn->dev, f12);
ret = rmi_f12_read_sensor_tuning(f12);
if (ret)
return ret;
/*
* Figure out what data is contained in the data registers. HID devices
* may have registers defined, but their data is not reported in the
* HID attention report. Registers which are not reported in the HID
* attention report check to see if the device is receiving data from
* HID attention reports.
*/
item = rmi_get_register_desc_item(&f12->data_reg_desc, 0);
if (item && !drvdata->attn_data.data)
data_offset += item->reg_size;
item = rmi_get_register_desc_item(&f12->data_reg_desc, 1);
if (item) {
f12->data1 = item;
f12->data1_offset = data_offset;
data_offset += item->reg_size;
sensor->nbr_fingers = item->num_subpackets;
sensor->report_abs = 1;
sensor->attn_size += item->reg_size;
}
item = rmi_get_register_desc_item(&f12->data_reg_desc, 2);
if (item && !drvdata->attn_data.data)
data_offset += item->reg_size;
item = rmi_get_register_desc_item(&f12->data_reg_desc, 3);
if (item && !drvdata->attn_data.data)
data_offset += item->reg_size;
item = rmi_get_register_desc_item(&f12->data_reg_desc, 4);
if (item && !drvdata->attn_data.data)
data_offset += item->reg_size;
item = rmi_get_register_desc_item(&f12->data_reg_desc, 5);
if (item) {
f12->data5 = item;
f12->data5_offset = data_offset;
data_offset += item->reg_size;
sensor->attn_size += item->reg_size;
}
item = rmi_get_register_desc_item(&f12->data_reg_desc, 6);
if (item && !drvdata->attn_data.data) {
f12->data6 = item;
f12->data6_offset = data_offset;
data_offset += item->reg_size;
}
item = rmi_get_register_desc_item(&f12->data_reg_desc, 7);
if (item && !drvdata->attn_data.data)
data_offset += item->reg_size;
item = rmi_get_register_desc_item(&f12->data_reg_desc, 8);
if (item && !drvdata->attn_data.data)
data_offset += item->reg_size;
item = rmi_get_register_desc_item(&f12->data_reg_desc, 9);
if (item && !drvdata->attn_data.data) {
f12->data9 = item;
f12->data9_offset = data_offset;
data_offset += item->reg_size;
if (!sensor->report_abs)
sensor->report_rel = 1;
}
item = rmi_get_register_desc_item(&f12->data_reg_desc, 10);
if (item && !drvdata->attn_data.data)
data_offset += item->reg_size;
item = rmi_get_register_desc_item(&f12->data_reg_desc, 11);
if (item && !drvdata->attn_data.data)
data_offset += item->reg_size;
item = rmi_get_register_desc_item(&f12->data_reg_desc, 12);
if (item && !drvdata->attn_data.data)
data_offset += item->reg_size;
item = rmi_get_register_desc_item(&f12->data_reg_desc, 13);
if (item && !drvdata->attn_data.data)
data_offset += item->reg_size;
item = rmi_get_register_desc_item(&f12->data_reg_desc, 14);
if (item && !drvdata->attn_data.data)
data_offset += item->reg_size;
item = rmi_get_register_desc_item(&f12->data_reg_desc, 15);
if (item && !drvdata->attn_data.data) {
f12->data15 = item;
f12->data15_offset = data_offset;
data_offset += item->reg_size;
}
/* allocate the in-kernel tracking buffers */
sensor->tracking_pos = devm_kcalloc(&fn->dev,
sensor->nbr_fingers, sizeof(struct input_mt_pos),
GFP_KERNEL);
sensor->tracking_slots = devm_kcalloc(&fn->dev,
sensor->nbr_fingers, sizeof(int), GFP_KERNEL);
sensor->objs = devm_kcalloc(&fn->dev,
sensor->nbr_fingers,
sizeof(struct rmi_2d_sensor_abs_object),
GFP_KERNEL);
if (!sensor->tracking_pos || !sensor->tracking_slots || !sensor->objs)
return -ENOMEM;
ret = rmi_2d_sensor_configure_input(fn, sensor);
if (ret)
return ret;
return 0;
}
struct rmi_function_handler rmi_f12_handler = {
.driver = {
.name = "rmi4_f12",
},
.func = 0x12,
.probe = rmi_f12_probe,
.config = rmi_f12_config,
.attention = rmi_f12_attention,
};
|
linux-master
|
drivers/input/rmi4/rmi_f12.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2011-2016 Synaptics Incorporated
* Copyright (c) 2011 Unixphere
*/
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/list.h>
#include <linux/pm.h>
#include <linux/rmi.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/of.h>
#include "rmi_bus.h"
#include "rmi_driver.h"
static int debug_flags;
module_param(debug_flags, int, 0644);
MODULE_PARM_DESC(debug_flags, "control debugging information");
void rmi_dbg(int flags, struct device *dev, const char *fmt, ...)
{
struct va_format vaf;
va_list args;
if (flags & debug_flags) {
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
dev_printk(KERN_DEBUG, dev, "%pV", &vaf);
va_end(args);
}
}
EXPORT_SYMBOL_GPL(rmi_dbg);
/*
* RMI Physical devices
*
* Physical RMI device consists of several functions serving particular
* purpose. For example F11 is a 2D touch sensor while F01 is a generic
* function present in every RMI device.
*/
static void rmi_release_device(struct device *dev)
{
struct rmi_device *rmi_dev = to_rmi_device(dev);
kfree(rmi_dev);
}
static const struct device_type rmi_device_type = {
.name = "rmi4_sensor",
.release = rmi_release_device,
};
bool rmi_is_physical_device(struct device *dev)
{
return dev->type == &rmi_device_type;
}
/**
* rmi_register_transport_device - register a transport device connection
* on the RMI bus. Transport drivers provide communication from the devices
* on a bus (such as SPI, I2C, and so on) to the RMI4 sensor.
*
* @xport: the transport device to register
*/
int rmi_register_transport_device(struct rmi_transport_dev *xport)
{
static atomic_t transport_device_count = ATOMIC_INIT(0);
struct rmi_device *rmi_dev;
int error;
rmi_dev = kzalloc(sizeof(struct rmi_device), GFP_KERNEL);
if (!rmi_dev)
return -ENOMEM;
device_initialize(&rmi_dev->dev);
rmi_dev->xport = xport;
rmi_dev->number = atomic_inc_return(&transport_device_count) - 1;
dev_set_name(&rmi_dev->dev, "rmi4-%02d", rmi_dev->number);
rmi_dev->dev.bus = &rmi_bus_type;
rmi_dev->dev.type = &rmi_device_type;
rmi_dev->dev.parent = xport->dev;
xport->rmi_dev = rmi_dev;
error = device_add(&rmi_dev->dev);
if (error)
goto err_put_device;
rmi_dbg(RMI_DEBUG_CORE, xport->dev,
"%s: Registered %s as %s.\n", __func__,
dev_name(rmi_dev->xport->dev), dev_name(&rmi_dev->dev));
return 0;
err_put_device:
put_device(&rmi_dev->dev);
return error;
}
EXPORT_SYMBOL_GPL(rmi_register_transport_device);
/**
* rmi_unregister_transport_device - unregister a transport device connection
* @xport: the transport driver to unregister
*
*/
void rmi_unregister_transport_device(struct rmi_transport_dev *xport)
{
struct rmi_device *rmi_dev = xport->rmi_dev;
device_del(&rmi_dev->dev);
put_device(&rmi_dev->dev);
}
EXPORT_SYMBOL(rmi_unregister_transport_device);
/* Function specific stuff */
static void rmi_release_function(struct device *dev)
{
struct rmi_function *fn = to_rmi_function(dev);
kfree(fn);
}
static const struct device_type rmi_function_type = {
.name = "rmi4_function",
.release = rmi_release_function,
};
bool rmi_is_function_device(struct device *dev)
{
return dev->type == &rmi_function_type;
}
static int rmi_function_match(struct device *dev, struct device_driver *drv)
{
struct rmi_function_handler *handler = to_rmi_function_handler(drv);
struct rmi_function *fn = to_rmi_function(dev);
return fn->fd.function_number == handler->func;
}
#ifdef CONFIG_OF
static void rmi_function_of_probe(struct rmi_function *fn)
{
char of_name[9];
struct device_node *node = fn->rmi_dev->xport->dev->of_node;
snprintf(of_name, sizeof(of_name), "rmi4-f%02x",
fn->fd.function_number);
fn->dev.of_node = of_get_child_by_name(node, of_name);
}
#else
static inline void rmi_function_of_probe(struct rmi_function *fn)
{}
#endif
static struct irq_chip rmi_irq_chip = {
.name = "rmi4",
};
static int rmi_create_function_irq(struct rmi_function *fn,
struct rmi_function_handler *handler)
{
struct rmi_driver_data *drvdata = dev_get_drvdata(&fn->rmi_dev->dev);
int i, error;
for (i = 0; i < fn->num_of_irqs; i++) {
set_bit(fn->irq_pos + i, fn->irq_mask);
fn->irq[i] = irq_create_mapping(drvdata->irqdomain,
fn->irq_pos + i);
irq_set_chip_data(fn->irq[i], fn);
irq_set_chip_and_handler(fn->irq[i], &rmi_irq_chip,
handle_simple_irq);
irq_set_nested_thread(fn->irq[i], 1);
error = devm_request_threaded_irq(&fn->dev, fn->irq[i], NULL,
handler->attention, IRQF_ONESHOT,
dev_name(&fn->dev), fn);
if (error) {
dev_err(&fn->dev, "Error %d registering IRQ\n", error);
return error;
}
}
return 0;
}
static int rmi_function_probe(struct device *dev)
{
struct rmi_function *fn = to_rmi_function(dev);
struct rmi_function_handler *handler =
to_rmi_function_handler(dev->driver);
int error;
rmi_function_of_probe(fn);
if (handler->probe) {
error = handler->probe(fn);
if (error)
return error;
}
if (fn->num_of_irqs && handler->attention) {
error = rmi_create_function_irq(fn, handler);
if (error)
return error;
}
return 0;
}
static int rmi_function_remove(struct device *dev)
{
struct rmi_function *fn = to_rmi_function(dev);
struct rmi_function_handler *handler =
to_rmi_function_handler(dev->driver);
if (handler->remove)
handler->remove(fn);
return 0;
}
int rmi_register_function(struct rmi_function *fn)
{
struct rmi_device *rmi_dev = fn->rmi_dev;
int error;
device_initialize(&fn->dev);
dev_set_name(&fn->dev, "%s.fn%02x",
dev_name(&rmi_dev->dev), fn->fd.function_number);
fn->dev.parent = &rmi_dev->dev;
fn->dev.type = &rmi_function_type;
fn->dev.bus = &rmi_bus_type;
error = device_add(&fn->dev);
if (error) {
dev_err(&rmi_dev->dev,
"Failed device_register function device %s\n",
dev_name(&fn->dev));
goto err_put_device;
}
rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev, "Registered F%02X.\n",
fn->fd.function_number);
return 0;
err_put_device:
put_device(&fn->dev);
return error;
}
void rmi_unregister_function(struct rmi_function *fn)
{
int i;
rmi_dbg(RMI_DEBUG_CORE, &fn->dev, "Unregistering F%02X.\n",
fn->fd.function_number);
device_del(&fn->dev);
of_node_put(fn->dev.of_node);
put_device(&fn->dev);
for (i = 0; i < fn->num_of_irqs; i++)
irq_dispose_mapping(fn->irq[i]);
}
/**
* __rmi_register_function_handler - register a handler for an RMI function
* @handler: RMI handler that should be registered.
* @owner: pointer to module that implements the handler
* @mod_name: name of the module implementing the handler
*
* This function performs additional setup of RMI function handler and
* registers it with the RMI core so that it can be bound to
* RMI function devices.
*/
int __rmi_register_function_handler(struct rmi_function_handler *handler,
struct module *owner,
const char *mod_name)
{
struct device_driver *driver = &handler->driver;
int error;
driver->bus = &rmi_bus_type;
driver->owner = owner;
driver->mod_name = mod_name;
driver->probe = rmi_function_probe;
driver->remove = rmi_function_remove;
error = driver_register(driver);
if (error) {
pr_err("driver_register() failed for %s, error: %d\n",
driver->name, error);
return error;
}
return 0;
}
EXPORT_SYMBOL_GPL(__rmi_register_function_handler);
/**
* rmi_unregister_function_handler - unregister given RMI function handler
* @handler: RMI handler that should be unregistered.
*
* This function unregisters given function handler from RMI core which
* causes it to be unbound from the function devices.
*/
void rmi_unregister_function_handler(struct rmi_function_handler *handler)
{
driver_unregister(&handler->driver);
}
EXPORT_SYMBOL_GPL(rmi_unregister_function_handler);
/* Bus specific stuff */
static int rmi_bus_match(struct device *dev, struct device_driver *drv)
{
bool physical = rmi_is_physical_device(dev);
/* First see if types are not compatible */
if (physical != rmi_is_physical_driver(drv))
return 0;
return physical || rmi_function_match(dev, drv);
}
struct bus_type rmi_bus_type = {
.match = rmi_bus_match,
.name = "rmi4",
};
static struct rmi_function_handler *fn_handlers[] = {
&rmi_f01_handler,
#ifdef CONFIG_RMI4_F03
&rmi_f03_handler,
#endif
#ifdef CONFIG_RMI4_F11
&rmi_f11_handler,
#endif
#ifdef CONFIG_RMI4_F12
&rmi_f12_handler,
#endif
#ifdef CONFIG_RMI4_F30
&rmi_f30_handler,
#endif
#ifdef CONFIG_RMI4_F34
&rmi_f34_handler,
#endif
#ifdef CONFIG_RMI4_F3A
&rmi_f3a_handler,
#endif
#ifdef CONFIG_RMI4_F54
&rmi_f54_handler,
#endif
#ifdef CONFIG_RMI4_F55
&rmi_f55_handler,
#endif
};
static void __rmi_unregister_function_handlers(int start_idx)
{
int i;
for (i = start_idx; i >= 0; i--)
rmi_unregister_function_handler(fn_handlers[i]);
}
static void rmi_unregister_function_handlers(void)
{
__rmi_unregister_function_handlers(ARRAY_SIZE(fn_handlers) - 1);
}
static int rmi_register_function_handlers(void)
{
int ret;
int i;
for (i = 0; i < ARRAY_SIZE(fn_handlers); i++) {
ret = rmi_register_function_handler(fn_handlers[i]);
if (ret) {
pr_err("%s: error registering the RMI F%02x handler: %d\n",
__func__, fn_handlers[i]->func, ret);
goto err_unregister_function_handlers;
}
}
return 0;
err_unregister_function_handlers:
__rmi_unregister_function_handlers(i - 1);
return ret;
}
int rmi_of_property_read_u32(struct device *dev, u32 *result,
const char *prop, bool optional)
{
int retval;
u32 val = 0;
retval = of_property_read_u32(dev->of_node, prop, &val);
if (retval && (!optional && retval == -EINVAL)) {
dev_err(dev, "Failed to get %s value: %d\n",
prop, retval);
return retval;
}
*result = val;
return 0;
}
EXPORT_SYMBOL_GPL(rmi_of_property_read_u32);
static int __init rmi_bus_init(void)
{
int error;
error = bus_register(&rmi_bus_type);
if (error) {
pr_err("%s: error registering the RMI bus: %d\n",
__func__, error);
return error;
}
error = rmi_register_function_handlers();
if (error)
goto err_unregister_bus;
error = rmi_register_physical_driver();
if (error) {
pr_err("%s: error registering the RMI physical driver: %d\n",
__func__, error);
goto err_unregister_bus;
}
return 0;
err_unregister_bus:
bus_unregister(&rmi_bus_type);
return error;
}
module_init(rmi_bus_init);
static void __exit rmi_bus_exit(void)
{
/*
* We should only ever get here if all drivers are unloaded, so
* all we have to do at this point is unregister ourselves.
*/
rmi_unregister_physical_driver();
rmi_unregister_function_handlers();
bus_unregister(&rmi_bus_type);
}
module_exit(rmi_bus_exit);
MODULE_AUTHOR("Christopher Heiny <[email protected]");
MODULE_AUTHOR("Andrew Duggan <[email protected]");
MODULE_DESCRIPTION("RMI bus");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/rmi4/rmi_bus.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2011-2016 Synaptics Incorporated
* Copyright (c) 2011 Unixphere
*/
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/of.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/rmi.h>
#include "rmi_driver.h"
#include "rmi_2d_sensor.h"
#define RMI_2D_REL_POS_MIN -128
#define RMI_2D_REL_POS_MAX 127
/* maximum ABS_MT_POSITION displacement (in mm) */
#define DMAX 10
void rmi_2d_sensor_abs_process(struct rmi_2d_sensor *sensor,
struct rmi_2d_sensor_abs_object *obj,
int slot)
{
struct rmi_2d_axis_alignment *axis_align = &sensor->axis_align;
/* we keep the previous values if the finger is released */
if (obj->type == RMI_2D_OBJECT_NONE)
return;
if (axis_align->flip_x)
obj->x = sensor->max_x - obj->x;
if (axis_align->flip_y)
obj->y = sensor->max_y - obj->y;
if (axis_align->swap_axes)
swap(obj->x, obj->y);
/*
* Here checking if X offset or y offset are specified is
* redundant. We just add the offsets or clip the values.
*
* Note: offsets need to be applied before clipping occurs,
* or we could get funny values that are outside of
* clipping boundaries.
*/
obj->x += axis_align->offset_x;
obj->y += axis_align->offset_y;
obj->x = max(axis_align->clip_x_low, obj->x);
obj->y = max(axis_align->clip_y_low, obj->y);
if (axis_align->clip_x_high)
obj->x = min(sensor->max_x, obj->x);
if (axis_align->clip_y_high)
obj->y = min(sensor->max_y, obj->y);
sensor->tracking_pos[slot].x = obj->x;
sensor->tracking_pos[slot].y = obj->y;
}
EXPORT_SYMBOL_GPL(rmi_2d_sensor_abs_process);
void rmi_2d_sensor_abs_report(struct rmi_2d_sensor *sensor,
struct rmi_2d_sensor_abs_object *obj,
int slot)
{
struct rmi_2d_axis_alignment *axis_align = &sensor->axis_align;
struct input_dev *input = sensor->input;
int wide, major, minor;
if (sensor->kernel_tracking)
input_mt_slot(input, sensor->tracking_slots[slot]);
else
input_mt_slot(input, slot);
input_mt_report_slot_state(input, obj->mt_tool,
obj->type != RMI_2D_OBJECT_NONE);
if (obj->type != RMI_2D_OBJECT_NONE) {
obj->x = sensor->tracking_pos[slot].x;
obj->y = sensor->tracking_pos[slot].y;
if (axis_align->swap_axes)
swap(obj->wx, obj->wy);
wide = (obj->wx > obj->wy);
major = max(obj->wx, obj->wy);
minor = min(obj->wx, obj->wy);
if (obj->type == RMI_2D_OBJECT_STYLUS) {
major = max(1, major);
minor = max(1, minor);
}
input_event(sensor->input, EV_ABS, ABS_MT_POSITION_X, obj->x);
input_event(sensor->input, EV_ABS, ABS_MT_POSITION_Y, obj->y);
input_event(sensor->input, EV_ABS, ABS_MT_ORIENTATION, wide);
input_event(sensor->input, EV_ABS, ABS_MT_PRESSURE, obj->z);
input_event(sensor->input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
input_event(sensor->input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
rmi_dbg(RMI_DEBUG_2D_SENSOR, &sensor->input->dev,
"%s: obj[%d]: type: 0x%02x X: %d Y: %d Z: %d WX: %d WY: %d\n",
__func__, slot, obj->type, obj->x, obj->y, obj->z,
obj->wx, obj->wy);
}
}
EXPORT_SYMBOL_GPL(rmi_2d_sensor_abs_report);
void rmi_2d_sensor_rel_report(struct rmi_2d_sensor *sensor, int x, int y)
{
struct rmi_2d_axis_alignment *axis_align = &sensor->axis_align;
x = min(RMI_2D_REL_POS_MAX, max(RMI_2D_REL_POS_MIN, (int)x));
y = min(RMI_2D_REL_POS_MAX, max(RMI_2D_REL_POS_MIN, (int)y));
if (axis_align->flip_x)
x = min(RMI_2D_REL_POS_MAX, -x);
if (axis_align->flip_y)
y = min(RMI_2D_REL_POS_MAX, -y);
if (axis_align->swap_axes)
swap(x, y);
if (x || y) {
input_report_rel(sensor->input, REL_X, x);
input_report_rel(sensor->input, REL_Y, y);
}
}
EXPORT_SYMBOL_GPL(rmi_2d_sensor_rel_report);
static void rmi_2d_sensor_set_input_params(struct rmi_2d_sensor *sensor)
{
struct input_dev *input = sensor->input;
int res_x;
int res_y;
int max_x, max_y;
int input_flags = 0;
if (sensor->report_abs) {
sensor->min_x = sensor->axis_align.clip_x_low;
if (sensor->axis_align.clip_x_high)
sensor->max_x = min(sensor->max_x,
sensor->axis_align.clip_x_high);
sensor->min_y = sensor->axis_align.clip_y_low;
if (sensor->axis_align.clip_y_high)
sensor->max_y = min(sensor->max_y,
sensor->axis_align.clip_y_high);
set_bit(EV_ABS, input->evbit);
max_x = sensor->max_x;
max_y = sensor->max_y;
if (sensor->axis_align.swap_axes)
swap(max_x, max_y);
input_set_abs_params(input, ABS_MT_POSITION_X, 0, max_x, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0, max_y, 0, 0);
if (sensor->x_mm && sensor->y_mm) {
res_x = (sensor->max_x - sensor->min_x) / sensor->x_mm;
res_y = (sensor->max_y - sensor->min_y) / sensor->y_mm;
if (sensor->axis_align.swap_axes)
swap(res_x, res_y);
input_abs_set_res(input, ABS_X, res_x);
input_abs_set_res(input, ABS_Y, res_y);
input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
if (!sensor->dmax)
sensor->dmax = DMAX * res_x;
}
input_set_abs_params(input, ABS_MT_PRESSURE, 0, 0xff, 0, 0);
input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 0x0f, 0, 0);
input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 0x0f, 0, 0);
input_set_abs_params(input, ABS_MT_ORIENTATION, 0, 1, 0, 0);
input_set_abs_params(input, ABS_MT_TOOL_TYPE,
0, MT_TOOL_MAX, 0, 0);
if (sensor->sensor_type == rmi_sensor_touchpad)
input_flags = INPUT_MT_POINTER;
else
input_flags = INPUT_MT_DIRECT;
if (sensor->kernel_tracking)
input_flags |= INPUT_MT_TRACK;
input_mt_init_slots(input, sensor->nbr_fingers, input_flags);
}
if (sensor->report_rel) {
set_bit(EV_REL, input->evbit);
set_bit(REL_X, input->relbit);
set_bit(REL_Y, input->relbit);
}
if (sensor->topbuttonpad)
set_bit(INPUT_PROP_TOPBUTTONPAD, input->propbit);
}
int rmi_2d_sensor_configure_input(struct rmi_function *fn,
struct rmi_2d_sensor *sensor)
{
struct rmi_device *rmi_dev = fn->rmi_dev;
struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
if (!drv_data->input)
return -ENODEV;
sensor->input = drv_data->input;
rmi_2d_sensor_set_input_params(sensor);
return 0;
}
EXPORT_SYMBOL_GPL(rmi_2d_sensor_configure_input);
#ifdef CONFIG_OF
int rmi_2d_sensor_of_probe(struct device *dev,
struct rmi_2d_sensor_platform_data *pdata)
{
int retval;
u32 val;
pdata->axis_align.swap_axes = of_property_read_bool(dev->of_node,
"touchscreen-swapped-x-y");
pdata->axis_align.flip_x = of_property_read_bool(dev->of_node,
"touchscreen-inverted-x");
pdata->axis_align.flip_y = of_property_read_bool(dev->of_node,
"touchscreen-inverted-y");
retval = rmi_of_property_read_u32(dev, &val, "syna,clip-x-low", 1);
if (retval)
return retval;
pdata->axis_align.clip_x_low = val;
retval = rmi_of_property_read_u32(dev, &val, "syna,clip-y-low", 1);
if (retval)
return retval;
pdata->axis_align.clip_y_low = val;
retval = rmi_of_property_read_u32(dev, &val, "syna,clip-x-high", 1);
if (retval)
return retval;
pdata->axis_align.clip_x_high = val;
retval = rmi_of_property_read_u32(dev, &val, "syna,clip-y-high", 1);
if (retval)
return retval;
pdata->axis_align.clip_y_high = val;
retval = rmi_of_property_read_u32(dev, &val, "syna,offset-x", 1);
if (retval)
return retval;
pdata->axis_align.offset_x = val;
retval = rmi_of_property_read_u32(dev, &val, "syna,offset-y", 1);
if (retval)
return retval;
pdata->axis_align.offset_y = val;
retval = rmi_of_property_read_u32(dev, &val, "syna,delta-x-threshold",
1);
if (retval)
return retval;
pdata->axis_align.delta_x_threshold = val;
retval = rmi_of_property_read_u32(dev, &val, "syna,delta-y-threshold",
1);
if (retval)
return retval;
pdata->axis_align.delta_y_threshold = val;
retval = rmi_of_property_read_u32(dev, (u32 *)&pdata->sensor_type,
"syna,sensor-type", 1);
if (retval)
return retval;
retval = rmi_of_property_read_u32(dev, &val, "touchscreen-x-mm", 1);
if (retval)
return retval;
pdata->x_mm = val;
retval = rmi_of_property_read_u32(dev, &val, "touchscreen-y-mm", 1);
if (retval)
return retval;
pdata->y_mm = val;
retval = rmi_of_property_read_u32(dev, &val,
"syna,disable-report-mask", 1);
if (retval)
return retval;
pdata->disable_report_mask = val;
retval = rmi_of_property_read_u32(dev, &val, "syna,rezero-wait-ms",
1);
if (retval)
return retval;
pdata->rezero_wait = val;
return 0;
}
#else
inline int rmi_2d_sensor_of_probe(struct device *dev,
struct rmi_2d_sensor_platform_data *pdata)
{
return -ENODEV;
}
#endif
EXPORT_SYMBOL_GPL(rmi_2d_sensor_of_probe);
|
linux-master
|
drivers/input/rmi4/rmi_2d_sensor.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2007-2016, Synaptics Incorporated
* Copyright (C) 2016 Zodiac Inflight Innovations
*/
#include <linux/kernel.h>
#include <linux/rmi.h>
#include <linux/firmware.h>
#include <asm/unaligned.h>
#include <linux/bitops.h>
#include "rmi_driver.h"
#include "rmi_f34.h"
static int rmi_f34_write_bootloader_id(struct f34_data *f34)
{
struct rmi_function *fn = f34->fn;
struct rmi_device *rmi_dev = fn->rmi_dev;
u8 bootloader_id[F34_BOOTLOADER_ID_LEN];
int ret;
ret = rmi_read_block(rmi_dev, fn->fd.query_base_addr,
bootloader_id, sizeof(bootloader_id));
if (ret) {
dev_err(&fn->dev, "%s: Reading bootloader ID failed: %d\n",
__func__, ret);
return ret;
}
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: writing bootloader id '%c%c'\n",
__func__, bootloader_id[0], bootloader_id[1]);
ret = rmi_write_block(rmi_dev,
fn->fd.data_base_addr + F34_BLOCK_DATA_OFFSET,
bootloader_id, sizeof(bootloader_id));
if (ret) {
dev_err(&fn->dev, "Failed to write bootloader ID: %d\n", ret);
return ret;
}
return 0;
}
static int rmi_f34_command(struct f34_data *f34, u8 command,
unsigned int timeout, bool write_bl_id)
{
struct rmi_function *fn = f34->fn;
struct rmi_device *rmi_dev = fn->rmi_dev;
int ret;
if (write_bl_id) {
ret = rmi_f34_write_bootloader_id(f34);
if (ret)
return ret;
}
init_completion(&f34->v5.cmd_done);
ret = rmi_read(rmi_dev, f34->v5.ctrl_address, &f34->v5.status);
if (ret) {
dev_err(&f34->fn->dev,
"%s: Failed to read cmd register: %d (command %#02x)\n",
__func__, ret, command);
return ret;
}
f34->v5.status |= command & 0x0f;
ret = rmi_write(rmi_dev, f34->v5.ctrl_address, f34->v5.status);
if (ret < 0) {
dev_err(&f34->fn->dev,
"Failed to write F34 command %#02x: %d\n",
command, ret);
return ret;
}
if (!wait_for_completion_timeout(&f34->v5.cmd_done,
msecs_to_jiffies(timeout))) {
ret = rmi_read(rmi_dev, f34->v5.ctrl_address, &f34->v5.status);
if (ret) {
dev_err(&f34->fn->dev,
"%s: cmd %#02x timed out: %d\n",
__func__, command, ret);
return ret;
}
if (f34->v5.status & 0x7f) {
dev_err(&f34->fn->dev,
"%s: cmd %#02x timed out, status: %#02x\n",
__func__, command, f34->v5.status);
return -ETIMEDOUT;
}
}
return 0;
}
static irqreturn_t rmi_f34_attention(int irq, void *ctx)
{
struct rmi_function *fn = ctx;
struct f34_data *f34 = dev_get_drvdata(&fn->dev);
int ret;
u8 status;
if (f34->bl_version == 5) {
ret = rmi_read(f34->fn->rmi_dev, f34->v5.ctrl_address,
&status);
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: status: %#02x, ret: %d\n",
__func__, status, ret);
if (!ret && !(status & 0x7f))
complete(&f34->v5.cmd_done);
} else {
ret = rmi_read_block(f34->fn->rmi_dev,
f34->fn->fd.data_base_addr +
V7_COMMAND_OFFSET,
&status, sizeof(status));
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev, "%s: cmd: %#02x, ret: %d\n",
__func__, status, ret);
if (!ret && status == CMD_V7_IDLE)
complete(&f34->v7.cmd_done);
}
return IRQ_HANDLED;
}
static int rmi_f34_write_blocks(struct f34_data *f34, const void *data,
int block_count, u8 command)
{
struct rmi_function *fn = f34->fn;
struct rmi_device *rmi_dev = fn->rmi_dev;
u16 address = fn->fd.data_base_addr + F34_BLOCK_DATA_OFFSET;
u8 start_address[] = { 0, 0 };
int i;
int ret;
ret = rmi_write_block(rmi_dev, fn->fd.data_base_addr,
start_address, sizeof(start_address));
if (ret) {
dev_err(&fn->dev, "Failed to write initial zeros: %d\n", ret);
return ret;
}
for (i = 0; i < block_count; i++) {
ret = rmi_write_block(rmi_dev, address,
data, f34->v5.block_size);
if (ret) {
dev_err(&fn->dev,
"failed to write block #%d: %d\n", i, ret);
return ret;
}
ret = rmi_f34_command(f34, command, F34_IDLE_WAIT_MS, false);
if (ret) {
dev_err(&fn->dev,
"Failed to write command for block #%d: %d\n",
i, ret);
return ret;
}
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "wrote block %d of %d\n",
i + 1, block_count);
data += f34->v5.block_size;
f34->update_progress += f34->v5.block_size;
f34->update_status = (f34->update_progress * 100) /
f34->update_size;
}
return 0;
}
static int rmi_f34_write_firmware(struct f34_data *f34, const void *data)
{
return rmi_f34_write_blocks(f34, data, f34->v5.fw_blocks,
F34_WRITE_FW_BLOCK);
}
static int rmi_f34_write_config(struct f34_data *f34, const void *data)
{
return rmi_f34_write_blocks(f34, data, f34->v5.config_blocks,
F34_WRITE_CONFIG_BLOCK);
}
static int rmi_f34_enable_flash(struct f34_data *f34)
{
return rmi_f34_command(f34, F34_ENABLE_FLASH_PROG,
F34_ENABLE_WAIT_MS, true);
}
static int rmi_f34_flash_firmware(struct f34_data *f34,
const struct rmi_f34_firmware *syn_fw)
{
struct rmi_function *fn = f34->fn;
u32 image_size = le32_to_cpu(syn_fw->image_size);
u32 config_size = le32_to_cpu(syn_fw->config_size);
int ret;
f34->update_progress = 0;
f34->update_size = image_size + config_size;
if (image_size) {
dev_info(&fn->dev, "Erasing firmware...\n");
ret = rmi_f34_command(f34, F34_ERASE_ALL,
F34_ERASE_WAIT_MS, true);
if (ret)
return ret;
dev_info(&fn->dev, "Writing firmware (%d bytes)...\n",
image_size);
ret = rmi_f34_write_firmware(f34, syn_fw->data);
if (ret)
return ret;
}
if (config_size) {
/*
* We only need to erase config if we haven't updated
* firmware.
*/
if (!image_size) {
dev_info(&fn->dev, "Erasing config...\n");
ret = rmi_f34_command(f34, F34_ERASE_CONFIG,
F34_ERASE_WAIT_MS, true);
if (ret)
return ret;
}
dev_info(&fn->dev, "Writing config (%d bytes)...\n",
config_size);
ret = rmi_f34_write_config(f34, &syn_fw->data[image_size]);
if (ret)
return ret;
}
return 0;
}
static int rmi_f34_update_firmware(struct f34_data *f34,
const struct firmware *fw)
{
const struct rmi_f34_firmware *syn_fw =
(const struct rmi_f34_firmware *)fw->data;
u32 image_size = le32_to_cpu(syn_fw->image_size);
u32 config_size = le32_to_cpu(syn_fw->config_size);
int ret;
BUILD_BUG_ON(offsetof(struct rmi_f34_firmware, data) !=
F34_FW_IMAGE_OFFSET);
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
"FW size:%zd, checksum:%08x, image_size:%d, config_size:%d\n",
fw->size,
le32_to_cpu(syn_fw->checksum),
image_size, config_size);
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
"FW bootloader_id:%02x, product_id:%.*s, info: %02x%02x\n",
syn_fw->bootloader_version,
(int)sizeof(syn_fw->product_id), syn_fw->product_id,
syn_fw->product_info[0], syn_fw->product_info[1]);
if (image_size && image_size != f34->v5.fw_blocks * f34->v5.block_size) {
dev_err(&f34->fn->dev,
"Bad firmware image: fw size %d, expected %d\n",
image_size, f34->v5.fw_blocks * f34->v5.block_size);
ret = -EILSEQ;
goto out;
}
if (config_size &&
config_size != f34->v5.config_blocks * f34->v5.block_size) {
dev_err(&f34->fn->dev,
"Bad firmware image: config size %d, expected %d\n",
config_size,
f34->v5.config_blocks * f34->v5.block_size);
ret = -EILSEQ;
goto out;
}
if (image_size && !config_size) {
dev_err(&f34->fn->dev, "Bad firmware image: no config data\n");
ret = -EILSEQ;
goto out;
}
dev_info(&f34->fn->dev, "Firmware image OK\n");
mutex_lock(&f34->v5.flash_mutex);
ret = rmi_f34_flash_firmware(f34, syn_fw);
mutex_unlock(&f34->v5.flash_mutex);
out:
return ret;
}
static int rmi_f34_status(struct rmi_function *fn)
{
struct f34_data *f34 = dev_get_drvdata(&fn->dev);
/*
* The status is the percentage complete, or once complete,
* zero for success or a negative return code.
*/
return f34->update_status;
}
static ssize_t rmi_driver_bootloader_id_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct rmi_function *fn = data->f34_container;
struct f34_data *f34;
if (fn) {
f34 = dev_get_drvdata(&fn->dev);
if (f34->bl_version == 5)
return sysfs_emit(buf, "%c%c\n",
f34->bootloader_id[0],
f34->bootloader_id[1]);
else
return sysfs_emit(buf, "V%d.%d\n",
f34->bootloader_id[1],
f34->bootloader_id[0]);
}
return 0;
}
static DEVICE_ATTR(bootloader_id, 0444, rmi_driver_bootloader_id_show, NULL);
static ssize_t rmi_driver_configuration_id_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct rmi_function *fn = data->f34_container;
struct f34_data *f34;
if (fn) {
f34 = dev_get_drvdata(&fn->dev);
return sysfs_emit(buf, "%s\n", f34->configuration_id);
}
return 0;
}
static DEVICE_ATTR(configuration_id, 0444,
rmi_driver_configuration_id_show, NULL);
static int rmi_firmware_update(struct rmi_driver_data *data,
const struct firmware *fw)
{
struct rmi_device *rmi_dev = data->rmi_dev;
struct device *dev = &rmi_dev->dev;
struct f34_data *f34;
int ret;
if (!data->f34_container) {
dev_warn(dev, "%s: No F34 present!\n", __func__);
return -EINVAL;
}
f34 = dev_get_drvdata(&data->f34_container->dev);
if (f34->bl_version >= 7) {
if (data->pdt_props & HAS_BSR) {
dev_err(dev, "%s: LTS not supported\n", __func__);
return -ENODEV;
}
} else if (f34->bl_version != 5) {
dev_warn(dev, "F34 V%d not supported!\n",
data->f34_container->fd.function_version);
return -ENODEV;
}
/* Enter flash mode */
if (f34->bl_version >= 7)
ret = rmi_f34v7_start_reflash(f34, fw);
else
ret = rmi_f34_enable_flash(f34);
if (ret)
return ret;
rmi_disable_irq(rmi_dev, false);
/* Tear down functions and re-probe */
rmi_free_function_list(rmi_dev);
ret = rmi_probe_interrupts(data);
if (ret)
return ret;
ret = rmi_init_functions(data);
if (ret)
return ret;
if (!data->bootloader_mode || !data->f34_container) {
dev_warn(dev, "%s: No F34 present or not in bootloader!\n",
__func__);
return -EINVAL;
}
rmi_enable_irq(rmi_dev, false);
f34 = dev_get_drvdata(&data->f34_container->dev);
/* Perform firmware update */
if (f34->bl_version >= 7)
ret = rmi_f34v7_do_reflash(f34, fw);
else
ret = rmi_f34_update_firmware(f34, fw);
if (ret) {
f34->update_status = ret;
dev_err(&f34->fn->dev,
"Firmware update failed, status: %d\n", ret);
} else {
dev_info(&f34->fn->dev, "Firmware update complete\n");
}
rmi_disable_irq(rmi_dev, false);
/* Re-probe */
rmi_dbg(RMI_DEBUG_FN, dev, "Re-probing device\n");
rmi_free_function_list(rmi_dev);
ret = rmi_scan_pdt(rmi_dev, NULL, rmi_initial_reset);
if (ret < 0)
dev_warn(dev, "RMI reset failed!\n");
ret = rmi_probe_interrupts(data);
if (ret)
return ret;
ret = rmi_init_functions(data);
if (ret)
return ret;
rmi_enable_irq(rmi_dev, false);
if (data->f01_container->dev.driver)
/* Driver already bound, so enable ATTN now. */
return rmi_enable_sensor(rmi_dev);
rmi_dbg(RMI_DEBUG_FN, dev, "%s complete\n", __func__);
return ret;
}
static ssize_t rmi_driver_update_fw_store(struct device *dev,
struct device_attribute *dattr,
const char *buf, size_t count)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
char fw_name[NAME_MAX];
const struct firmware *fw;
size_t copy_count = count;
int ret;
if (count == 0 || count >= NAME_MAX)
return -EINVAL;
if (buf[count - 1] == '\0' || buf[count - 1] == '\n')
copy_count -= 1;
strncpy(fw_name, buf, copy_count);
fw_name[copy_count] = '\0';
ret = request_firmware(&fw, fw_name, dev);
if (ret)
return ret;
dev_info(dev, "Flashing %s\n", fw_name);
ret = rmi_firmware_update(data, fw);
release_firmware(fw);
return ret ?: count;
}
static DEVICE_ATTR(update_fw, 0200, NULL, rmi_driver_update_fw_store);
static ssize_t rmi_driver_update_fw_status_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
int update_status = 0;
if (data->f34_container)
update_status = rmi_f34_status(data->f34_container);
return sysfs_emit(buf, "%d\n", update_status);
}
static DEVICE_ATTR(update_fw_status, 0444,
rmi_driver_update_fw_status_show, NULL);
static struct attribute *rmi_firmware_attrs[] = {
&dev_attr_bootloader_id.attr,
&dev_attr_configuration_id.attr,
&dev_attr_update_fw.attr,
&dev_attr_update_fw_status.attr,
NULL
};
static const struct attribute_group rmi_firmware_attr_group = {
.attrs = rmi_firmware_attrs,
};
static int rmi_f34_probe(struct rmi_function *fn)
{
struct f34_data *f34;
unsigned char f34_queries[9];
bool has_config_id;
u8 version = fn->fd.function_version;
int ret;
f34 = devm_kzalloc(&fn->dev, sizeof(struct f34_data), GFP_KERNEL);
if (!f34)
return -ENOMEM;
f34->fn = fn;
dev_set_drvdata(&fn->dev, f34);
/* v5 code only supported version 0, try V7 probe */
if (version > 0)
return rmi_f34v7_probe(f34);
f34->bl_version = 5;
ret = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr,
f34_queries, sizeof(f34_queries));
if (ret) {
dev_err(&fn->dev, "%s: Failed to query properties\n",
__func__);
return ret;
}
snprintf(f34->bootloader_id, sizeof(f34->bootloader_id),
"%c%c", f34_queries[0], f34_queries[1]);
mutex_init(&f34->v5.flash_mutex);
init_completion(&f34->v5.cmd_done);
f34->v5.block_size = get_unaligned_le16(&f34_queries[3]);
f34->v5.fw_blocks = get_unaligned_le16(&f34_queries[5]);
f34->v5.config_blocks = get_unaligned_le16(&f34_queries[7]);
f34->v5.ctrl_address = fn->fd.data_base_addr + F34_BLOCK_DATA_OFFSET +
f34->v5.block_size;
has_config_id = f34_queries[2] & (1 << 2);
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Bootloader ID: %s\n",
f34->bootloader_id);
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Block size: %d\n",
f34->v5.block_size);
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "FW blocks: %d\n",
f34->v5.fw_blocks);
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "CFG blocks: %d\n",
f34->v5.config_blocks);
if (has_config_id) {
ret = rmi_read_block(fn->rmi_dev, fn->fd.control_base_addr,
f34_queries, sizeof(f34_queries));
if (ret) {
dev_err(&fn->dev, "Failed to read F34 config ID\n");
return ret;
}
snprintf(f34->configuration_id, sizeof(f34->configuration_id),
"%02x%02x%02x%02x",
f34_queries[0], f34_queries[1],
f34_queries[2], f34_queries[3]);
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Configuration ID: %s\n",
f34->configuration_id);
}
return 0;
}
int rmi_f34_create_sysfs(struct rmi_device *rmi_dev)
{
return sysfs_create_group(&rmi_dev->dev.kobj, &rmi_firmware_attr_group);
}
void rmi_f34_remove_sysfs(struct rmi_device *rmi_dev)
{
sysfs_remove_group(&rmi_dev->dev.kobj, &rmi_firmware_attr_group);
}
struct rmi_function_handler rmi_f34_handler = {
.driver = {
.name = "rmi4_f34",
},
.func = 0x34,
.probe = rmi_f34_probe,
.attention = rmi_f34_attention,
};
|
linux-master
|
drivers/input/rmi4/rmi_f34.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2012-2015 Synaptics Incorporated
* Copyright (C) 2016 Zodiac Inflight Innovations
*/
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/rmi.h>
#include <linux/slab.h>
#include "rmi_driver.h"
#define F55_NAME "rmi4_f55"
/* F55 data offsets */
#define F55_NUM_RX_OFFSET 0
#define F55_NUM_TX_OFFSET 1
#define F55_PHYS_CHAR_OFFSET 2
/* Only read required query registers */
#define F55_QUERY_LEN 3
/* F55 capabilities */
#define F55_CAP_SENSOR_ASSIGN BIT(0)
struct f55_data {
struct rmi_function *fn;
u8 qry[F55_QUERY_LEN];
u8 num_rx_electrodes;
u8 cfg_num_rx_electrodes;
u8 num_tx_electrodes;
u8 cfg_num_tx_electrodes;
};
static int rmi_f55_detect(struct rmi_function *fn)
{
struct rmi_device *rmi_dev = fn->rmi_dev;
struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
struct f55_data *f55;
int error;
f55 = dev_get_drvdata(&fn->dev);
error = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr,
&f55->qry, sizeof(f55->qry));
if (error) {
dev_err(&fn->dev, "%s: Failed to query F55 properties\n",
__func__);
return error;
}
f55->num_rx_electrodes = f55->qry[F55_NUM_RX_OFFSET];
f55->num_tx_electrodes = f55->qry[F55_NUM_TX_OFFSET];
f55->cfg_num_rx_electrodes = f55->num_rx_electrodes;
f55->cfg_num_tx_electrodes = f55->num_rx_electrodes;
drv_data->num_rx_electrodes = f55->cfg_num_rx_electrodes;
drv_data->num_tx_electrodes = f55->cfg_num_rx_electrodes;
if (f55->qry[F55_PHYS_CHAR_OFFSET] & F55_CAP_SENSOR_ASSIGN) {
int i, total;
u8 buf[256];
/*
* Calculate the number of enabled receive and transmit
* electrodes by reading F55:Ctrl1 (sensor receiver assignment)
* and F55:Ctrl2 (sensor transmitter assignment). The number of
* enabled electrodes is the sum of all field entries with a
* value other than 0xff.
*/
error = rmi_read_block(fn->rmi_dev,
fn->fd.control_base_addr + 1,
buf, f55->num_rx_electrodes);
if (!error) {
total = 0;
for (i = 0; i < f55->num_rx_electrodes; i++) {
if (buf[i] != 0xff)
total++;
}
f55->cfg_num_rx_electrodes = total;
drv_data->num_rx_electrodes = total;
}
error = rmi_read_block(fn->rmi_dev,
fn->fd.control_base_addr + 2,
buf, f55->num_tx_electrodes);
if (!error) {
total = 0;
for (i = 0; i < f55->num_tx_electrodes; i++) {
if (buf[i] != 0xff)
total++;
}
f55->cfg_num_tx_electrodes = total;
drv_data->num_tx_electrodes = total;
}
}
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F55 num_rx_electrodes: %d (raw %d)\n",
f55->cfg_num_rx_electrodes, f55->num_rx_electrodes);
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F55 num_tx_electrodes: %d (raw %d)\n",
f55->cfg_num_tx_electrodes, f55->num_tx_electrodes);
return 0;
}
static int rmi_f55_probe(struct rmi_function *fn)
{
struct f55_data *f55;
f55 = devm_kzalloc(&fn->dev, sizeof(struct f55_data), GFP_KERNEL);
if (!f55)
return -ENOMEM;
f55->fn = fn;
dev_set_drvdata(&fn->dev, f55);
return rmi_f55_detect(fn);
}
struct rmi_function_handler rmi_f55_handler = {
.driver = {
.name = F55_NAME,
},
.func = 0x55,
.probe = rmi_f55_probe,
};
|
linux-master
|
drivers/input/rmi4/rmi_f55.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2011-2015 Synaptics Incorporated
* Copyright (c) 2011 Unixphere
*/
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/rmi.h>
#include <linux/slab.h>
#include <linux/of.h>
#include "rmi_driver.h"
#include "rmi_2d_sensor.h"
#define F11_MAX_NUM_OF_FINGERS 10
#define F11_MAX_NUM_OF_TOUCH_SHAPES 16
#define FINGER_STATE_MASK 0x03
#define F11_CTRL_SENSOR_MAX_X_POS_OFFSET 6
#define F11_CTRL_SENSOR_MAX_Y_POS_OFFSET 8
#define DEFAULT_XY_MAX 9999
#define DEFAULT_MAX_ABS_MT_PRESSURE 255
#define DEFAULT_MAX_ABS_MT_TOUCH 15
#define DEFAULT_MAX_ABS_MT_ORIENTATION 1
#define DEFAULT_MIN_ABS_MT_TRACKING_ID 1
#define DEFAULT_MAX_ABS_MT_TRACKING_ID 10
/*
* A note about RMI4 F11 register structure.
*
* The properties for a given sensor are described by its query registers. The
* number of query registers and the layout of their contents are described by
* the F11 device queries as well as the sensor query information.
*
* Similarly, each sensor has control registers that govern its behavior. The
* size and layout of the control registers for a given sensor can be determined
* by parsing that sensors query registers.
*
* And in a likewise fashion, each sensor has data registers where it reports
* its touch data and other interesting stuff. The size and layout of a
* sensors data registers must be determined by parsing its query registers.
*
* The short story is that we need to read and parse a lot of query
* registers in order to determine the attributes of a sensor. Then
* we need to use that data to compute the size of the control and data
* registers for sensor.
*
* The end result is that we have a number of structs that aren't used to
* directly generate the input events, but their size, location and contents
* are critical to determining where the data we are interested in lives.
*
* At this time, the driver does not yet comprehend all possible F11
* configuration options, but it should be sufficient to cover 99% of RMI4 F11
* devices currently in the field.
*/
/* maximum ABS_MT_POSITION displacement (in mm) */
#define DMAX 10
/*
* Writing this to the F11 command register will cause the sensor to
* calibrate to the current capacitive state.
*/
#define RMI_F11_REZERO 0x01
#define RMI_F11_HAS_QUERY9 (1 << 3)
#define RMI_F11_HAS_QUERY11 (1 << 4)
#define RMI_F11_HAS_QUERY12 (1 << 5)
#define RMI_F11_HAS_QUERY27 (1 << 6)
#define RMI_F11_HAS_QUERY28 (1 << 7)
/** Defs for Query 1 */
#define RMI_F11_NR_FINGERS_MASK 0x07
#define RMI_F11_HAS_REL (1 << 3)
#define RMI_F11_HAS_ABS (1 << 4)
#define RMI_F11_HAS_GESTURES (1 << 5)
#define RMI_F11_HAS_SENSITIVITY_ADJ (1 << 6)
#define RMI_F11_CONFIGURABLE (1 << 7)
/** Defs for Query 2, 3, and 4. */
#define RMI_F11_NR_ELECTRODES_MASK 0x7F
/** Defs for Query 5 */
#define RMI_F11_ABS_DATA_SIZE_MASK 0x03
#define RMI_F11_HAS_ANCHORED_FINGER (1 << 2)
#define RMI_F11_HAS_ADJ_HYST (1 << 3)
#define RMI_F11_HAS_DRIBBLE (1 << 4)
#define RMI_F11_HAS_BENDING_CORRECTION (1 << 5)
#define RMI_F11_HAS_LARGE_OBJECT_SUPPRESSION (1 << 6)
#define RMI_F11_HAS_JITTER_FILTER (1 << 7)
/** Defs for Query 7 */
#define RMI_F11_HAS_SINGLE_TAP (1 << 0)
#define RMI_F11_HAS_TAP_AND_HOLD (1 << 1)
#define RMI_F11_HAS_DOUBLE_TAP (1 << 2)
#define RMI_F11_HAS_EARLY_TAP (1 << 3)
#define RMI_F11_HAS_FLICK (1 << 4)
#define RMI_F11_HAS_PRESS (1 << 5)
#define RMI_F11_HAS_PINCH (1 << 6)
#define RMI_F11_HAS_CHIRAL (1 << 7)
/** Defs for Query 8 */
#define RMI_F11_HAS_PALM_DET (1 << 0)
#define RMI_F11_HAS_ROTATE (1 << 1)
#define RMI_F11_HAS_TOUCH_SHAPES (1 << 2)
#define RMI_F11_HAS_SCROLL_ZONES (1 << 3)
#define RMI_F11_HAS_INDIVIDUAL_SCROLL_ZONES (1 << 4)
#define RMI_F11_HAS_MF_SCROLL (1 << 5)
#define RMI_F11_HAS_MF_EDGE_MOTION (1 << 6)
#define RMI_F11_HAS_MF_SCROLL_INERTIA (1 << 7)
/** Defs for Query 9. */
#define RMI_F11_HAS_PEN (1 << 0)
#define RMI_F11_HAS_PROXIMITY (1 << 1)
#define RMI_F11_HAS_PALM_DET_SENSITIVITY (1 << 2)
#define RMI_F11_HAS_SUPPRESS_ON_PALM_DETECT (1 << 3)
#define RMI_F11_HAS_TWO_PEN_THRESHOLDS (1 << 4)
#define RMI_F11_HAS_CONTACT_GEOMETRY (1 << 5)
#define RMI_F11_HAS_PEN_HOVER_DISCRIMINATION (1 << 6)
#define RMI_F11_HAS_PEN_FILTERS (1 << 7)
/** Defs for Query 10. */
#define RMI_F11_NR_TOUCH_SHAPES_MASK 0x1F
/** Defs for Query 11 */
#define RMI_F11_HAS_Z_TUNING (1 << 0)
#define RMI_F11_HAS_ALGORITHM_SELECTION (1 << 1)
#define RMI_F11_HAS_W_TUNING (1 << 2)
#define RMI_F11_HAS_PITCH_INFO (1 << 3)
#define RMI_F11_HAS_FINGER_SIZE (1 << 4)
#define RMI_F11_HAS_SEGMENTATION_AGGRESSIVENESS (1 << 5)
#define RMI_F11_HAS_XY_CLIP (1 << 6)
#define RMI_F11_HAS_DRUMMING_FILTER (1 << 7)
/** Defs for Query 12. */
#define RMI_F11_HAS_GAPLESS_FINGER (1 << 0)
#define RMI_F11_HAS_GAPLESS_FINGER_TUNING (1 << 1)
#define RMI_F11_HAS_8BIT_W (1 << 2)
#define RMI_F11_HAS_ADJUSTABLE_MAPPING (1 << 3)
#define RMI_F11_HAS_INFO2 (1 << 4)
#define RMI_F11_HAS_PHYSICAL_PROPS (1 << 5)
#define RMI_F11_HAS_FINGER_LIMIT (1 << 6)
#define RMI_F11_HAS_LINEAR_COEFF (1 << 7)
/** Defs for Query 13. */
#define RMI_F11_JITTER_WINDOW_MASK 0x1F
#define RMI_F11_JITTER_FILTER_MASK 0x60
#define RMI_F11_JITTER_FILTER_SHIFT 5
/** Defs for Query 14. */
#define RMI_F11_LIGHT_CONTROL_MASK 0x03
#define RMI_F11_IS_CLEAR (1 << 2)
#define RMI_F11_CLICKPAD_PROPS_MASK 0x18
#define RMI_F11_CLICKPAD_PROPS_SHIFT 3
#define RMI_F11_MOUSE_BUTTONS_MASK 0x60
#define RMI_F11_MOUSE_BUTTONS_SHIFT 5
#define RMI_F11_HAS_ADVANCED_GESTURES (1 << 7)
#define RMI_F11_QUERY_SIZE 4
#define RMI_F11_QUERY_GESTURE_SIZE 2
#define F11_LIGHT_CTL_NONE 0x00
#define F11_LUXPAD 0x01
#define F11_DUAL_MODE 0x02
#define F11_NOT_CLICKPAD 0x00
#define F11_HINGED_CLICKPAD 0x01
#define F11_UNIFORM_CLICKPAD 0x02
/**
* struct f11_2d_sensor_queries - describes sensor capabilities
*
* Query registers 1 through 4 are always present.
*
* @nr_fingers: describes the maximum number of fingers the 2-D sensor
* supports.
* @has_rel: the sensor supports relative motion reporting.
* @has_abs: the sensor supports absolute poition reporting.
* @has_gestures: the sensor supports gesture reporting.
* @has_sensitivity_adjust: the sensor supports a global sensitivity
* adjustment.
* @configurable: the sensor supports various configuration options.
* @nr_x_electrodes: the maximum number of electrodes the 2-D sensor
* supports on the X axis.
* @nr_y_electrodes: the maximum number of electrodes the 2-D sensor
* supports on the Y axis.
* @max_electrodes: the total number of X and Y electrodes that may be
* configured.
*
* Query 5 is present if the has_abs bit is set.
*
* @abs_data_size: describes the format of data reported by the absolute
* data source. Only one format (the kind used here) is supported at this
* time.
* @has_anchored_finger: then the sensor supports the high-precision second
* finger tracking provided by the manual tracking and motion sensitivity
* options.
* @has_adj_hyst: the difference between the finger release threshold and
* the touch threshold.
* @has_dribble: the sensor supports the generation of dribble interrupts,
* which may be enabled or disabled with the dribble control bit.
* @has_bending_correction: Bending related data registers 28 and 36, and
* control register 52..57 are present.
* @has_large_object_suppression: control register 58 and data register 28
* exist.
* @has_jitter_filter: query 13 and control 73..76 exist.
*
* Query 6 is present if the has_rel it is set.
*
* @f11_2d_query6: this register is reserved.
*
* Gesture information queries 7 and 8 are present if has_gestures bit is set.
*
* @has_single_tap: a basic single-tap gesture is supported.
* @has_tap_n_hold: tap-and-hold gesture is supported.
* @has_double_tap: double-tap gesture is supported.
* @has_early_tap: early tap is supported and reported as soon as the finger
* lifts for any tap event that could be interpreted as either a single
* tap or as the first tap of a double-tap or tap-and-hold gesture.
* @has_flick: flick detection is supported.
* @has_press: press gesture reporting is supported.
* @has_pinch: pinch gesture detection is supported.
* @has_chiral: chiral (circular) scrolling gesture detection is supported.
* @has_palm_det: the 2-D sensor notifies the host whenever a large conductive
* object such as a palm or a cheek touches the 2-D sensor.
* @has_rotate: rotation gesture detection is supported.
* @has_touch_shapes: TouchShapes are supported. A TouchShape is a fixed
* rectangular area on the sensor that behaves like a capacitive button.
* @has_scroll_zones: scrolling areas near the sensor edges are supported.
* @has_individual_scroll_zones: if 1, then 4 scroll zones are supported;
* if 0, then only two are supported.
* @has_mf_scroll: the multifinger_scrolling bit will be set when
* more than one finger is involved in a scrolling action.
* @has_mf_edge_motion: indicates whether multi-finger edge motion gesture
* is supported.
* @has_mf_scroll_inertia: indicates whether multi-finger scroll inertia
* feature is supported.
*
* Convenience for checking bytes in the gesture info registers. This is done
* often enough that we put it here to declutter the conditionals
*
* @query7_nonzero: true if none of the query 7 bits are set
* @query8_nonzero: true if none of the query 8 bits are set
*
* Query 9 is present if the has_query9 is set.
*
* @has_pen: detection of a stylus is supported and registers F11_2D_Ctrl20
* and F11_2D_Ctrl21 exist.
* @has_proximity: detection of fingers near the sensor is supported and
* registers F11_2D_Ctrl22 through F11_2D_Ctrl26 exist.
* @has_palm_det_sensitivity: the sensor supports the palm detect sensitivity
* feature and register F11_2D_Ctrl27 exists.
* @has_suppress_on_palm_detect: the device supports the large object detect
* suppression feature and register F11_2D_Ctrl27 exists.
* @has_two_pen_thresholds: if has_pen is also set, then F11_2D_Ctrl35 exists.
* @has_contact_geometry: the sensor supports the use of contact geometry to
* map absolute X and Y target positions and registers F11_2D_Data18
* through F11_2D_Data27 exist.
* @has_pen_hover_discrimination: if has_pen is also set, then registers
* F11_2D_Data29 through F11_2D_Data31, F11_2D_Ctrl68.*, F11_2D_Ctrl69
* and F11_2D_Ctrl72 exist.
* @has_pen_filters: if has_pen is also set, then registers F11_2D_Ctrl70 and
* F11_2D_Ctrl71 exist.
*
* Touch shape info (query 10) is present if has_touch_shapes is set.
*
* @nr_touch_shapes: the total number of touch shapes supported.
*
* Query 11 is present if the has_query11 bit is set in query 0.
*
* @has_z_tuning: if set, the sensor supports Z tuning and registers
* F11_2D_Ctrl29 through F11_2D_Ctrl33 exist.
* @has_algorithm_selection: controls choice of noise suppression algorithm
* @has_w_tuning: the sensor supports Wx and Wy scaling and registers
* F11_2D_Ctrl36 through F11_2D_Ctrl39 exist.
* @has_pitch_info: the X and Y pitches of the sensor electrodes can be
* configured and registers F11_2D_Ctrl40 and F11_2D_Ctrl41 exist.
* @has_finger_size: the default finger width settings for the sensor
* can be configured and registers F11_2D_Ctrl42 through F11_2D_Ctrl44
* exist.
* @has_segmentation_aggressiveness: the sensor’s ability to distinguish
* multiple objects close together can be configured and register
* F11_2D_Ctrl45 exists.
* @has_XY_clip: the inactive outside borders of the sensor can be
* configured and registers F11_2D_Ctrl46 through F11_2D_Ctrl49 exist.
* @has_drumming_filter: the sensor can be configured to distinguish
* between a fast flick and a quick drumming movement and registers
* F11_2D_Ctrl50 and F11_2D_Ctrl51 exist.
*
* Query 12 is present if hasQuery12 bit is set.
*
* @has_gapless_finger: control registers relating to gapless finger are
* present.
* @has_gapless_finger_tuning: additional control and data registers relating
* to gapless finger are present.
* @has_8bit_w: larger W value reporting is supported.
* @has_adjustable_mapping: TBD
* @has_info2: the general info query14 is present
* @has_physical_props: additional queries describing the physical properties
* of the sensor are present.
* @has_finger_limit: indicates that F11 Ctrl 80 exists.
* @has_linear_coeff_2: indicates that F11 Ctrl 81 exists.
*
* Query 13 is present if Query 5's has_jitter_filter bit is set.
*
* @jitter_window_size: used by Design Studio 4.
* @jitter_filter_type: used by Design Studio 4.
*
* Query 14 is present if query 12's has_general_info2 flag is set.
*
* @light_control: Indicates what light/led control features are present,
* if any.
* @is_clear: if set, this is a clear sensor (indicating direct pointing
* application), otherwise it's opaque (indicating indirect pointing).
* @clickpad_props: specifies if this is a clickpad, and if so what sort of
* mechanism it uses
* @mouse_buttons: specifies the number of mouse buttons present (if any).
* @has_advanced_gestures: advanced driver gestures are supported.
*
* @x_sensor_size_mm: size of the sensor in millimeters on the X axis.
* @y_sensor_size_mm: size of the sensor in millimeters on the Y axis.
*/
struct f11_2d_sensor_queries {
/* query1 */
u8 nr_fingers;
bool has_rel;
bool has_abs;
bool has_gestures;
bool has_sensitivity_adjust;
bool configurable;
/* query2 */
u8 nr_x_electrodes;
/* query3 */
u8 nr_y_electrodes;
/* query4 */
u8 max_electrodes;
/* query5 */
u8 abs_data_size;
bool has_anchored_finger;
bool has_adj_hyst;
bool has_dribble;
bool has_bending_correction;
bool has_large_object_suppression;
bool has_jitter_filter;
u8 f11_2d_query6;
/* query 7 */
bool has_single_tap;
bool has_tap_n_hold;
bool has_double_tap;
bool has_early_tap;
bool has_flick;
bool has_press;
bool has_pinch;
bool has_chiral;
bool query7_nonzero;
/* query 8 */
bool has_palm_det;
bool has_rotate;
bool has_touch_shapes;
bool has_scroll_zones;
bool has_individual_scroll_zones;
bool has_mf_scroll;
bool has_mf_edge_motion;
bool has_mf_scroll_inertia;
bool query8_nonzero;
/* Query 9 */
bool has_pen;
bool has_proximity;
bool has_palm_det_sensitivity;
bool has_suppress_on_palm_detect;
bool has_two_pen_thresholds;
bool has_contact_geometry;
bool has_pen_hover_discrimination;
bool has_pen_filters;
/* Query 10 */
u8 nr_touch_shapes;
/* Query 11. */
bool has_z_tuning;
bool has_algorithm_selection;
bool has_w_tuning;
bool has_pitch_info;
bool has_finger_size;
bool has_segmentation_aggressiveness;
bool has_XY_clip;
bool has_drumming_filter;
/* Query 12 */
bool has_gapless_finger;
bool has_gapless_finger_tuning;
bool has_8bit_w;
bool has_adjustable_mapping;
bool has_info2;
bool has_physical_props;
bool has_finger_limit;
bool has_linear_coeff_2;
/* Query 13 */
u8 jitter_window_size;
u8 jitter_filter_type;
/* Query 14 */
u8 light_control;
bool is_clear;
u8 clickpad_props;
u8 mouse_buttons;
bool has_advanced_gestures;
/* Query 15 - 18 */
u16 x_sensor_size_mm;
u16 y_sensor_size_mm;
};
/* Defs for Ctrl0. */
#define RMI_F11_REPORT_MODE_MASK 0x07
#define RMI_F11_REPORT_MODE_CONTINUOUS (0 << 0)
#define RMI_F11_REPORT_MODE_REDUCED (1 << 0)
#define RMI_F11_REPORT_MODE_FS_CHANGE (2 << 0)
#define RMI_F11_REPORT_MODE_FP_CHANGE (3 << 0)
#define RMI_F11_ABS_POS_FILT (1 << 3)
#define RMI_F11_REL_POS_FILT (1 << 4)
#define RMI_F11_REL_BALLISTICS (1 << 5)
#define RMI_F11_DRIBBLE (1 << 6)
#define RMI_F11_REPORT_BEYOND_CLIP (1 << 7)
/* Defs for Ctrl1. */
#define RMI_F11_PALM_DETECT_THRESH_MASK 0x0F
#define RMI_F11_MOTION_SENSITIVITY_MASK 0x30
#define RMI_F11_MANUAL_TRACKING (1 << 6)
#define RMI_F11_MANUAL_TRACKED_FINGER (1 << 7)
#define RMI_F11_DELTA_X_THRESHOLD 2
#define RMI_F11_DELTA_Y_THRESHOLD 3
#define RMI_F11_CTRL_REG_COUNT 12
struct f11_2d_ctrl {
u8 ctrl0_11[RMI_F11_CTRL_REG_COUNT];
u16 ctrl0_11_address;
};
#define RMI_F11_ABS_BYTES 5
#define RMI_F11_REL_BYTES 2
/* Defs for Data 8 */
#define RMI_F11_SINGLE_TAP (1 << 0)
#define RMI_F11_TAP_AND_HOLD (1 << 1)
#define RMI_F11_DOUBLE_TAP (1 << 2)
#define RMI_F11_EARLY_TAP (1 << 3)
#define RMI_F11_FLICK (1 << 4)
#define RMI_F11_PRESS (1 << 5)
#define RMI_F11_PINCH (1 << 6)
/* Defs for Data 9 */
#define RMI_F11_PALM_DETECT (1 << 0)
#define RMI_F11_ROTATE (1 << 1)
#define RMI_F11_SHAPE (1 << 2)
#define RMI_F11_SCROLLZONE (1 << 3)
#define RMI_F11_GESTURE_FINGER_COUNT_MASK 0x70
/** Handy pointers into our data buffer.
*
* @f_state - start of finger state registers.
* @abs_pos - start of absolute position registers (if present).
* @rel_pos - start of relative data registers (if present).
* @gest_1 - gesture flags (if present).
* @gest_2 - gesture flags & finger count (if present).
* @pinch - pinch motion register (if present).
* @flick - flick distance X & Y, flick time (if present).
* @rotate - rotate motion and finger separation.
* @multi_scroll - chiral deltas for X and Y (if present).
* @scroll_zones - scroll deltas for 4 regions (if present).
*/
struct f11_2d_data {
u8 *f_state;
u8 *abs_pos;
s8 *rel_pos;
u8 *gest_1;
u8 *gest_2;
s8 *pinch;
u8 *flick;
u8 *rotate;
u8 *shapes;
s8 *multi_scroll;
s8 *scroll_zones;
};
/** Data pertaining to F11 in general. For per-sensor data, see struct
* f11_2d_sensor.
*
* @dev_query - F11 device specific query registers.
* @dev_controls - F11 device specific control registers.
* @dev_controls_mutex - lock for the control registers.
* @rezero_wait_ms - if nonzero, upon resume we will wait this many
* milliseconds before rezeroing the sensor(s). This is useful in systems with
* poor electrical behavior on resume, where the initial calibration of the
* sensor(s) coming out of sleep state may be bogus.
* @sensors - per sensor data structures.
*/
struct f11_data {
bool has_query9;
bool has_query11;
bool has_query12;
bool has_query27;
bool has_query28;
bool has_acm;
struct f11_2d_ctrl dev_controls;
struct mutex dev_controls_mutex;
u16 rezero_wait_ms;
struct rmi_2d_sensor sensor;
struct f11_2d_sensor_queries sens_query;
struct f11_2d_data data;
struct rmi_2d_sensor_platform_data sensor_pdata;
unsigned long *abs_mask;
unsigned long *rel_mask;
};
enum f11_finger_state {
F11_NO_FINGER = 0x00,
F11_PRESENT = 0x01,
F11_INACCURATE = 0x02,
F11_RESERVED = 0x03
};
static void rmi_f11_rel_pos_report(struct f11_data *f11, u8 n_finger)
{
struct rmi_2d_sensor *sensor = &f11->sensor;
struct f11_2d_data *data = &f11->data;
s8 x, y;
x = data->rel_pos[n_finger * RMI_F11_REL_BYTES];
y = data->rel_pos[n_finger * RMI_F11_REL_BYTES + 1];
rmi_2d_sensor_rel_report(sensor, x, y);
}
static void rmi_f11_abs_pos_process(struct f11_data *f11,
struct rmi_2d_sensor *sensor,
struct rmi_2d_sensor_abs_object *obj,
enum f11_finger_state finger_state,
u8 n_finger)
{
struct f11_2d_data *data = &f11->data;
u8 *pos_data = &data->abs_pos[n_finger * RMI_F11_ABS_BYTES];
int tool_type = MT_TOOL_FINGER;
switch (finger_state) {
case F11_PRESENT:
obj->type = RMI_2D_OBJECT_FINGER;
break;
default:
obj->type = RMI_2D_OBJECT_NONE;
}
obj->mt_tool = tool_type;
obj->x = (pos_data[0] << 4) | (pos_data[2] & 0x0F);
obj->y = (pos_data[1] << 4) | (pos_data[2] >> 4);
obj->z = pos_data[4];
obj->wx = pos_data[3] & 0x0f;
obj->wy = pos_data[3] >> 4;
rmi_2d_sensor_abs_process(sensor, obj, n_finger);
}
static inline u8 rmi_f11_parse_finger_state(const u8 *f_state, u8 n_finger)
{
return (f_state[n_finger / 4] >> (2 * (n_finger % 4))) &
FINGER_STATE_MASK;
}
static void rmi_f11_finger_handler(struct f11_data *f11,
struct rmi_2d_sensor *sensor, int size)
{
const u8 *f_state = f11->data.f_state;
u8 finger_state;
u8 i;
int abs_fingers;
int rel_fingers;
int abs_size = sensor->nbr_fingers * RMI_F11_ABS_BYTES;
if (sensor->report_abs) {
if (abs_size > size)
abs_fingers = size / RMI_F11_ABS_BYTES;
else
abs_fingers = sensor->nbr_fingers;
for (i = 0; i < abs_fingers; i++) {
/* Possible of having 4 fingers per f_state register */
finger_state = rmi_f11_parse_finger_state(f_state, i);
if (finger_state == F11_RESERVED) {
pr_err("Invalid finger state[%d]: 0x%02x", i,
finger_state);
continue;
}
rmi_f11_abs_pos_process(f11, sensor, &sensor->objs[i],
finger_state, i);
}
/*
* the absolute part is made in 2 parts to allow the kernel
* tracking to take place.
*/
if (sensor->kernel_tracking)
input_mt_assign_slots(sensor->input,
sensor->tracking_slots,
sensor->tracking_pos,
sensor->nbr_fingers,
sensor->dmax);
for (i = 0; i < abs_fingers; i++) {
finger_state = rmi_f11_parse_finger_state(f_state, i);
if (finger_state == F11_RESERVED)
/* no need to send twice the error */
continue;
rmi_2d_sensor_abs_report(sensor, &sensor->objs[i], i);
}
input_mt_sync_frame(sensor->input);
} else if (sensor->report_rel) {
if ((abs_size + sensor->nbr_fingers * RMI_F11_REL_BYTES) > size)
rel_fingers = (size - abs_size) / RMI_F11_REL_BYTES;
else
rel_fingers = sensor->nbr_fingers;
for (i = 0; i < rel_fingers; i++)
rmi_f11_rel_pos_report(f11, i);
}
}
static int f11_2d_construct_data(struct f11_data *f11)
{
struct rmi_2d_sensor *sensor = &f11->sensor;
struct f11_2d_sensor_queries *query = &f11->sens_query;
struct f11_2d_data *data = &f11->data;
int i;
sensor->nbr_fingers = (query->nr_fingers == 5 ? 10 :
query->nr_fingers + 1);
sensor->pkt_size = DIV_ROUND_UP(sensor->nbr_fingers, 4);
if (query->has_abs) {
sensor->pkt_size += (sensor->nbr_fingers * 5);
sensor->attn_size = sensor->pkt_size;
}
if (query->has_rel)
sensor->pkt_size += (sensor->nbr_fingers * 2);
/* Check if F11_2D_Query7 is non-zero */
if (query->query7_nonzero)
sensor->pkt_size += sizeof(u8);
/* Check if F11_2D_Query7 or F11_2D_Query8 is non-zero */
if (query->query7_nonzero || query->query8_nonzero)
sensor->pkt_size += sizeof(u8);
if (query->has_pinch || query->has_flick || query->has_rotate) {
sensor->pkt_size += 3;
if (!query->has_flick)
sensor->pkt_size--;
if (!query->has_rotate)
sensor->pkt_size--;
}
if (query->has_touch_shapes)
sensor->pkt_size +=
DIV_ROUND_UP(query->nr_touch_shapes + 1, 8);
sensor->data_pkt = devm_kzalloc(&sensor->fn->dev, sensor->pkt_size,
GFP_KERNEL);
if (!sensor->data_pkt)
return -ENOMEM;
data->f_state = sensor->data_pkt;
i = DIV_ROUND_UP(sensor->nbr_fingers, 4);
if (query->has_abs) {
data->abs_pos = &sensor->data_pkt[i];
i += (sensor->nbr_fingers * RMI_F11_ABS_BYTES);
}
if (query->has_rel) {
data->rel_pos = &sensor->data_pkt[i];
i += (sensor->nbr_fingers * RMI_F11_REL_BYTES);
}
if (query->query7_nonzero) {
data->gest_1 = &sensor->data_pkt[i];
i++;
}
if (query->query7_nonzero || query->query8_nonzero) {
data->gest_2 = &sensor->data_pkt[i];
i++;
}
if (query->has_pinch) {
data->pinch = &sensor->data_pkt[i];
i++;
}
if (query->has_flick) {
if (query->has_pinch) {
data->flick = data->pinch;
i += 2;
} else {
data->flick = &sensor->data_pkt[i];
i += 3;
}
}
if (query->has_rotate) {
if (query->has_flick) {
data->rotate = data->flick + 1;
} else {
data->rotate = &sensor->data_pkt[i];
i += 2;
}
}
if (query->has_touch_shapes)
data->shapes = &sensor->data_pkt[i];
return 0;
}
static int f11_read_control_regs(struct rmi_function *fn,
struct f11_2d_ctrl *ctrl, u16 ctrl_base_addr) {
struct rmi_device *rmi_dev = fn->rmi_dev;
int error = 0;
ctrl->ctrl0_11_address = ctrl_base_addr;
error = rmi_read_block(rmi_dev, ctrl_base_addr, ctrl->ctrl0_11,
RMI_F11_CTRL_REG_COUNT);
if (error < 0) {
dev_err(&fn->dev, "Failed to read ctrl0, code: %d.\n", error);
return error;
}
return 0;
}
static int f11_write_control_regs(struct rmi_function *fn,
struct f11_2d_sensor_queries *query,
struct f11_2d_ctrl *ctrl,
u16 ctrl_base_addr)
{
struct rmi_device *rmi_dev = fn->rmi_dev;
int error;
error = rmi_write_block(rmi_dev, ctrl_base_addr, ctrl->ctrl0_11,
RMI_F11_CTRL_REG_COUNT);
if (error < 0)
return error;
return 0;
}
static int rmi_f11_get_query_parameters(struct rmi_device *rmi_dev,
struct f11_data *f11,
struct f11_2d_sensor_queries *sensor_query,
u16 query_base_addr)
{
int query_size;
int rc;
u8 query_buf[RMI_F11_QUERY_SIZE];
bool has_query36 = false;
rc = rmi_read_block(rmi_dev, query_base_addr, query_buf,
RMI_F11_QUERY_SIZE);
if (rc < 0)
return rc;
sensor_query->nr_fingers = query_buf[0] & RMI_F11_NR_FINGERS_MASK;
sensor_query->has_rel = !!(query_buf[0] & RMI_F11_HAS_REL);
sensor_query->has_abs = !!(query_buf[0] & RMI_F11_HAS_ABS);
sensor_query->has_gestures = !!(query_buf[0] & RMI_F11_HAS_GESTURES);
sensor_query->has_sensitivity_adjust =
!!(query_buf[0] & RMI_F11_HAS_SENSITIVITY_ADJ);
sensor_query->configurable = !!(query_buf[0] & RMI_F11_CONFIGURABLE);
sensor_query->nr_x_electrodes =
query_buf[1] & RMI_F11_NR_ELECTRODES_MASK;
sensor_query->nr_y_electrodes =
query_buf[2] & RMI_F11_NR_ELECTRODES_MASK;
sensor_query->max_electrodes =
query_buf[3] & RMI_F11_NR_ELECTRODES_MASK;
query_size = RMI_F11_QUERY_SIZE;
if (sensor_query->has_abs) {
rc = rmi_read(rmi_dev, query_base_addr + query_size, query_buf);
if (rc < 0)
return rc;
sensor_query->abs_data_size =
query_buf[0] & RMI_F11_ABS_DATA_SIZE_MASK;
sensor_query->has_anchored_finger =
!!(query_buf[0] & RMI_F11_HAS_ANCHORED_FINGER);
sensor_query->has_adj_hyst =
!!(query_buf[0] & RMI_F11_HAS_ADJ_HYST);
sensor_query->has_dribble =
!!(query_buf[0] & RMI_F11_HAS_DRIBBLE);
sensor_query->has_bending_correction =
!!(query_buf[0] & RMI_F11_HAS_BENDING_CORRECTION);
sensor_query->has_large_object_suppression =
!!(query_buf[0] & RMI_F11_HAS_LARGE_OBJECT_SUPPRESSION);
sensor_query->has_jitter_filter =
!!(query_buf[0] & RMI_F11_HAS_JITTER_FILTER);
query_size++;
}
if (sensor_query->has_rel) {
rc = rmi_read(rmi_dev, query_base_addr + query_size,
&sensor_query->f11_2d_query6);
if (rc < 0)
return rc;
query_size++;
}
if (sensor_query->has_gestures) {
rc = rmi_read_block(rmi_dev, query_base_addr + query_size,
query_buf, RMI_F11_QUERY_GESTURE_SIZE);
if (rc < 0)
return rc;
sensor_query->has_single_tap =
!!(query_buf[0] & RMI_F11_HAS_SINGLE_TAP);
sensor_query->has_tap_n_hold =
!!(query_buf[0] & RMI_F11_HAS_TAP_AND_HOLD);
sensor_query->has_double_tap =
!!(query_buf[0] & RMI_F11_HAS_DOUBLE_TAP);
sensor_query->has_early_tap =
!!(query_buf[0] & RMI_F11_HAS_EARLY_TAP);
sensor_query->has_flick =
!!(query_buf[0] & RMI_F11_HAS_FLICK);
sensor_query->has_press =
!!(query_buf[0] & RMI_F11_HAS_PRESS);
sensor_query->has_pinch =
!!(query_buf[0] & RMI_F11_HAS_PINCH);
sensor_query->has_chiral =
!!(query_buf[0] & RMI_F11_HAS_CHIRAL);
/* query 8 */
sensor_query->has_palm_det =
!!(query_buf[1] & RMI_F11_HAS_PALM_DET);
sensor_query->has_rotate =
!!(query_buf[1] & RMI_F11_HAS_ROTATE);
sensor_query->has_touch_shapes =
!!(query_buf[1] & RMI_F11_HAS_TOUCH_SHAPES);
sensor_query->has_scroll_zones =
!!(query_buf[1] & RMI_F11_HAS_SCROLL_ZONES);
sensor_query->has_individual_scroll_zones =
!!(query_buf[1] & RMI_F11_HAS_INDIVIDUAL_SCROLL_ZONES);
sensor_query->has_mf_scroll =
!!(query_buf[1] & RMI_F11_HAS_MF_SCROLL);
sensor_query->has_mf_edge_motion =
!!(query_buf[1] & RMI_F11_HAS_MF_EDGE_MOTION);
sensor_query->has_mf_scroll_inertia =
!!(query_buf[1] & RMI_F11_HAS_MF_SCROLL_INERTIA);
sensor_query->query7_nonzero = !!(query_buf[0]);
sensor_query->query8_nonzero = !!(query_buf[1]);
query_size += 2;
}
if (f11->has_query9) {
rc = rmi_read(rmi_dev, query_base_addr + query_size, query_buf);
if (rc < 0)
return rc;
sensor_query->has_pen =
!!(query_buf[0] & RMI_F11_HAS_PEN);
sensor_query->has_proximity =
!!(query_buf[0] & RMI_F11_HAS_PROXIMITY);
sensor_query->has_palm_det_sensitivity =
!!(query_buf[0] & RMI_F11_HAS_PALM_DET_SENSITIVITY);
sensor_query->has_suppress_on_palm_detect =
!!(query_buf[0] & RMI_F11_HAS_SUPPRESS_ON_PALM_DETECT);
sensor_query->has_two_pen_thresholds =
!!(query_buf[0] & RMI_F11_HAS_TWO_PEN_THRESHOLDS);
sensor_query->has_contact_geometry =
!!(query_buf[0] & RMI_F11_HAS_CONTACT_GEOMETRY);
sensor_query->has_pen_hover_discrimination =
!!(query_buf[0] & RMI_F11_HAS_PEN_HOVER_DISCRIMINATION);
sensor_query->has_pen_filters =
!!(query_buf[0] & RMI_F11_HAS_PEN_FILTERS);
query_size++;
}
if (sensor_query->has_touch_shapes) {
rc = rmi_read(rmi_dev, query_base_addr + query_size, query_buf);
if (rc < 0)
return rc;
sensor_query->nr_touch_shapes = query_buf[0] &
RMI_F11_NR_TOUCH_SHAPES_MASK;
query_size++;
}
if (f11->has_query11) {
rc = rmi_read(rmi_dev, query_base_addr + query_size, query_buf);
if (rc < 0)
return rc;
sensor_query->has_z_tuning =
!!(query_buf[0] & RMI_F11_HAS_Z_TUNING);
sensor_query->has_algorithm_selection =
!!(query_buf[0] & RMI_F11_HAS_ALGORITHM_SELECTION);
sensor_query->has_w_tuning =
!!(query_buf[0] & RMI_F11_HAS_W_TUNING);
sensor_query->has_pitch_info =
!!(query_buf[0] & RMI_F11_HAS_PITCH_INFO);
sensor_query->has_finger_size =
!!(query_buf[0] & RMI_F11_HAS_FINGER_SIZE);
sensor_query->has_segmentation_aggressiveness =
!!(query_buf[0] &
RMI_F11_HAS_SEGMENTATION_AGGRESSIVENESS);
sensor_query->has_XY_clip =
!!(query_buf[0] & RMI_F11_HAS_XY_CLIP);
sensor_query->has_drumming_filter =
!!(query_buf[0] & RMI_F11_HAS_DRUMMING_FILTER);
query_size++;
}
if (f11->has_query12) {
rc = rmi_read(rmi_dev, query_base_addr + query_size, query_buf);
if (rc < 0)
return rc;
sensor_query->has_gapless_finger =
!!(query_buf[0] & RMI_F11_HAS_GAPLESS_FINGER);
sensor_query->has_gapless_finger_tuning =
!!(query_buf[0] & RMI_F11_HAS_GAPLESS_FINGER_TUNING);
sensor_query->has_8bit_w =
!!(query_buf[0] & RMI_F11_HAS_8BIT_W);
sensor_query->has_adjustable_mapping =
!!(query_buf[0] & RMI_F11_HAS_ADJUSTABLE_MAPPING);
sensor_query->has_info2 =
!!(query_buf[0] & RMI_F11_HAS_INFO2);
sensor_query->has_physical_props =
!!(query_buf[0] & RMI_F11_HAS_PHYSICAL_PROPS);
sensor_query->has_finger_limit =
!!(query_buf[0] & RMI_F11_HAS_FINGER_LIMIT);
sensor_query->has_linear_coeff_2 =
!!(query_buf[0] & RMI_F11_HAS_LINEAR_COEFF);
query_size++;
}
if (sensor_query->has_jitter_filter) {
rc = rmi_read(rmi_dev, query_base_addr + query_size, query_buf);
if (rc < 0)
return rc;
sensor_query->jitter_window_size = query_buf[0] &
RMI_F11_JITTER_WINDOW_MASK;
sensor_query->jitter_filter_type = (query_buf[0] &
RMI_F11_JITTER_FILTER_MASK) >>
RMI_F11_JITTER_FILTER_SHIFT;
query_size++;
}
if (sensor_query->has_info2) {
rc = rmi_read(rmi_dev, query_base_addr + query_size, query_buf);
if (rc < 0)
return rc;
sensor_query->light_control =
query_buf[0] & RMI_F11_LIGHT_CONTROL_MASK;
sensor_query->is_clear =
!!(query_buf[0] & RMI_F11_IS_CLEAR);
sensor_query->clickpad_props =
(query_buf[0] & RMI_F11_CLICKPAD_PROPS_MASK) >>
RMI_F11_CLICKPAD_PROPS_SHIFT;
sensor_query->mouse_buttons =
(query_buf[0] & RMI_F11_MOUSE_BUTTONS_MASK) >>
RMI_F11_MOUSE_BUTTONS_SHIFT;
sensor_query->has_advanced_gestures =
!!(query_buf[0] & RMI_F11_HAS_ADVANCED_GESTURES);
query_size++;
}
if (sensor_query->has_physical_props) {
rc = rmi_read_block(rmi_dev, query_base_addr
+ query_size, query_buf, 4);
if (rc < 0)
return rc;
sensor_query->x_sensor_size_mm =
(query_buf[0] | (query_buf[1] << 8)) / 10;
sensor_query->y_sensor_size_mm =
(query_buf[2] | (query_buf[3] << 8)) / 10;
/*
* query 15 - 18 contain the size of the sensor
* and query 19 - 26 contain bezel dimensions
*/
query_size += 12;
}
if (f11->has_query27)
++query_size;
if (f11->has_query28) {
rc = rmi_read(rmi_dev, query_base_addr + query_size,
query_buf);
if (rc < 0)
return rc;
has_query36 = !!(query_buf[0] & BIT(6));
}
if (has_query36) {
query_size += 2;
rc = rmi_read(rmi_dev, query_base_addr + query_size,
query_buf);
if (rc < 0)
return rc;
if (!!(query_buf[0] & BIT(5)))
f11->has_acm = true;
}
return query_size;
}
static int rmi_f11_initialize(struct rmi_function *fn)
{
struct rmi_device *rmi_dev = fn->rmi_dev;
struct f11_data *f11;
struct f11_2d_ctrl *ctrl;
u8 query_offset;
u16 query_base_addr;
u16 control_base_addr;
u16 max_x_pos, max_y_pos;
int rc;
const struct rmi_device_platform_data *pdata =
rmi_get_platform_data(rmi_dev);
struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev);
struct rmi_2d_sensor *sensor;
u8 buf;
int mask_size;
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Initializing F11 values.\n");
mask_size = BITS_TO_LONGS(drvdata->irq_count) * sizeof(unsigned long);
/*
** init instance data, fill in values and create any sysfs files
*/
f11 = devm_kzalloc(&fn->dev, sizeof(struct f11_data) + mask_size * 2,
GFP_KERNEL);
if (!f11)
return -ENOMEM;
if (fn->dev.of_node) {
rc = rmi_2d_sensor_of_probe(&fn->dev, &f11->sensor_pdata);
if (rc)
return rc;
} else {
f11->sensor_pdata = pdata->sensor_pdata;
}
f11->rezero_wait_ms = f11->sensor_pdata.rezero_wait;
f11->abs_mask = (unsigned long *)((char *)f11
+ sizeof(struct f11_data));
f11->rel_mask = (unsigned long *)((char *)f11
+ sizeof(struct f11_data) + mask_size);
set_bit(fn->irq_pos, f11->abs_mask);
set_bit(fn->irq_pos + 1, f11->rel_mask);
query_base_addr = fn->fd.query_base_addr;
control_base_addr = fn->fd.control_base_addr;
rc = rmi_read(rmi_dev, query_base_addr, &buf);
if (rc < 0)
return rc;
f11->has_query9 = !!(buf & RMI_F11_HAS_QUERY9);
f11->has_query11 = !!(buf & RMI_F11_HAS_QUERY11);
f11->has_query12 = !!(buf & RMI_F11_HAS_QUERY12);
f11->has_query27 = !!(buf & RMI_F11_HAS_QUERY27);
f11->has_query28 = !!(buf & RMI_F11_HAS_QUERY28);
query_offset = (query_base_addr + 1);
sensor = &f11->sensor;
sensor->fn = fn;
rc = rmi_f11_get_query_parameters(rmi_dev, f11,
&f11->sens_query, query_offset);
if (rc < 0)
return rc;
query_offset += rc;
rc = f11_read_control_regs(fn, &f11->dev_controls,
control_base_addr);
if (rc < 0) {
dev_err(&fn->dev,
"Failed to read F11 control params.\n");
return rc;
}
if (f11->sens_query.has_info2) {
if (f11->sens_query.is_clear)
f11->sensor.sensor_type = rmi_sensor_touchscreen;
else
f11->sensor.sensor_type = rmi_sensor_touchpad;
}
sensor->report_abs = f11->sens_query.has_abs;
sensor->axis_align =
f11->sensor_pdata.axis_align;
sensor->topbuttonpad = f11->sensor_pdata.topbuttonpad;
sensor->kernel_tracking = f11->sensor_pdata.kernel_tracking;
sensor->dmax = f11->sensor_pdata.dmax;
sensor->dribble = f11->sensor_pdata.dribble;
sensor->palm_detect = f11->sensor_pdata.palm_detect;
if (f11->sens_query.has_physical_props) {
sensor->x_mm = f11->sens_query.x_sensor_size_mm;
sensor->y_mm = f11->sens_query.y_sensor_size_mm;
} else {
sensor->x_mm = f11->sensor_pdata.x_mm;
sensor->y_mm = f11->sensor_pdata.y_mm;
}
if (sensor->sensor_type == rmi_sensor_default)
sensor->sensor_type =
f11->sensor_pdata.sensor_type;
sensor->report_abs = sensor->report_abs
&& !(f11->sensor_pdata.disable_report_mask
& RMI_F11_DISABLE_ABS_REPORT);
if (!sensor->report_abs)
/*
* If device doesn't have abs or if it has been disables
* fallback to reporting rel data.
*/
sensor->report_rel = f11->sens_query.has_rel;
rc = rmi_read_block(rmi_dev,
control_base_addr + F11_CTRL_SENSOR_MAX_X_POS_OFFSET,
(u8 *)&max_x_pos, sizeof(max_x_pos));
if (rc < 0)
return rc;
rc = rmi_read_block(rmi_dev,
control_base_addr + F11_CTRL_SENSOR_MAX_Y_POS_OFFSET,
(u8 *)&max_y_pos, sizeof(max_y_pos));
if (rc < 0)
return rc;
sensor->max_x = max_x_pos;
sensor->max_y = max_y_pos;
rc = f11_2d_construct_data(f11);
if (rc < 0)
return rc;
if (f11->has_acm)
f11->sensor.attn_size += f11->sensor.nbr_fingers * 2;
/* allocate the in-kernel tracking buffers */
sensor->tracking_pos = devm_kcalloc(&fn->dev,
sensor->nbr_fingers, sizeof(struct input_mt_pos),
GFP_KERNEL);
sensor->tracking_slots = devm_kcalloc(&fn->dev,
sensor->nbr_fingers, sizeof(int), GFP_KERNEL);
sensor->objs = devm_kcalloc(&fn->dev,
sensor->nbr_fingers,
sizeof(struct rmi_2d_sensor_abs_object),
GFP_KERNEL);
if (!sensor->tracking_pos || !sensor->tracking_slots || !sensor->objs)
return -ENOMEM;
ctrl = &f11->dev_controls;
if (sensor->axis_align.delta_x_threshold)
ctrl->ctrl0_11[RMI_F11_DELTA_X_THRESHOLD] =
sensor->axis_align.delta_x_threshold;
if (sensor->axis_align.delta_y_threshold)
ctrl->ctrl0_11[RMI_F11_DELTA_Y_THRESHOLD] =
sensor->axis_align.delta_y_threshold;
/*
* If distance threshold values are set, switch to reduced reporting
* mode so they actually get used by the controller.
*/
if (sensor->axis_align.delta_x_threshold ||
sensor->axis_align.delta_y_threshold) {
ctrl->ctrl0_11[0] &= ~RMI_F11_REPORT_MODE_MASK;
ctrl->ctrl0_11[0] |= RMI_F11_REPORT_MODE_REDUCED;
}
if (f11->sens_query.has_dribble) {
switch (sensor->dribble) {
case RMI_REG_STATE_OFF:
ctrl->ctrl0_11[0] &= ~BIT(6);
break;
case RMI_REG_STATE_ON:
ctrl->ctrl0_11[0] |= BIT(6);
break;
case RMI_REG_STATE_DEFAULT:
default:
break;
}
}
if (f11->sens_query.has_palm_det) {
switch (sensor->palm_detect) {
case RMI_REG_STATE_OFF:
ctrl->ctrl0_11[11] &= ~BIT(0);
break;
case RMI_REG_STATE_ON:
ctrl->ctrl0_11[11] |= BIT(0);
break;
case RMI_REG_STATE_DEFAULT:
default:
break;
}
}
rc = f11_write_control_regs(fn, &f11->sens_query,
&f11->dev_controls, fn->fd.control_base_addr);
if (rc)
dev_warn(&fn->dev, "Failed to write control registers\n");
mutex_init(&f11->dev_controls_mutex);
dev_set_drvdata(&fn->dev, f11);
return 0;
}
static int rmi_f11_config(struct rmi_function *fn)
{
struct f11_data *f11 = dev_get_drvdata(&fn->dev);
struct rmi_driver *drv = fn->rmi_dev->driver;
struct rmi_2d_sensor *sensor = &f11->sensor;
int rc;
if (!sensor->report_abs)
drv->clear_irq_bits(fn->rmi_dev, f11->abs_mask);
else
drv->set_irq_bits(fn->rmi_dev, f11->abs_mask);
if (!sensor->report_rel)
drv->clear_irq_bits(fn->rmi_dev, f11->rel_mask);
else
drv->set_irq_bits(fn->rmi_dev, f11->rel_mask);
rc = f11_write_control_regs(fn, &f11->sens_query,
&f11->dev_controls, fn->fd.query_base_addr);
if (rc < 0)
return rc;
return 0;
}
static irqreturn_t rmi_f11_attention(int irq, void *ctx)
{
struct rmi_function *fn = ctx;
struct rmi_device *rmi_dev = fn->rmi_dev;
struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev);
struct f11_data *f11 = dev_get_drvdata(&fn->dev);
u16 data_base_addr = fn->fd.data_base_addr;
int error;
int valid_bytes = f11->sensor.pkt_size;
if (drvdata->attn_data.data) {
/*
* The valid data in the attention report is less then
* expected. Only process the complete fingers.
*/
if (f11->sensor.attn_size > drvdata->attn_data.size)
valid_bytes = drvdata->attn_data.size;
else
valid_bytes = f11->sensor.attn_size;
memcpy(f11->sensor.data_pkt, drvdata->attn_data.data,
valid_bytes);
drvdata->attn_data.data += valid_bytes;
drvdata->attn_data.size -= valid_bytes;
} else {
error = rmi_read_block(rmi_dev,
data_base_addr, f11->sensor.data_pkt,
f11->sensor.pkt_size);
if (error < 0)
return IRQ_RETVAL(error);
}
rmi_f11_finger_handler(f11, &f11->sensor, valid_bytes);
return IRQ_HANDLED;
}
static int rmi_f11_resume(struct rmi_function *fn)
{
struct f11_data *f11 = dev_get_drvdata(&fn->dev);
int error;
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Resuming...\n");
if (!f11->rezero_wait_ms)
return 0;
mdelay(f11->rezero_wait_ms);
error = rmi_write(fn->rmi_dev, fn->fd.command_base_addr,
RMI_F11_REZERO);
if (error) {
dev_err(&fn->dev,
"%s: failed to issue rezero command, error = %d.",
__func__, error);
return error;
}
return 0;
}
static int rmi_f11_probe(struct rmi_function *fn)
{
int error;
struct f11_data *f11;
error = rmi_f11_initialize(fn);
if (error)
return error;
f11 = dev_get_drvdata(&fn->dev);
error = rmi_2d_sensor_configure_input(fn, &f11->sensor);
if (error)
return error;
return 0;
}
struct rmi_function_handler rmi_f11_handler = {
.driver = {
.name = "rmi4_f11",
},
.func = 0x11,
.probe = rmi_f11_probe,
.config = rmi_f11_config,
.attention = rmi_f11_attention,
.resume = rmi_f11_resume,
};
|
linux-master
|
drivers/input/rmi4/rmi_f11.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2015 - 2016 Red Hat, Inc
* Copyright (c) 2011, 2012 Synaptics Incorporated
* Copyright (c) 2011 Unixphere
*/
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/kconfig.h>
#include <linux/lockdep.h>
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/rmi.h>
#include <linux/slab.h>
#include "rmi_driver.h"
#define SMB_PROTOCOL_VERSION_ADDRESS 0xfd
#define SMB_MAX_COUNT 32
#define RMI_SMB2_MAP_SIZE 8 /* 8 entry of 4 bytes each */
#define RMI_SMB2_MAP_FLAGS_WE 0x01
struct mapping_table_entry {
__le16 rmiaddr;
u8 readcount;
u8 flags;
};
struct rmi_smb_xport {
struct rmi_transport_dev xport;
struct i2c_client *client;
struct mutex page_mutex;
int page;
u8 table_index;
struct mutex mappingtable_mutex;
struct mapping_table_entry mapping_table[RMI_SMB2_MAP_SIZE];
};
static int rmi_smb_get_version(struct rmi_smb_xport *rmi_smb)
{
struct i2c_client *client = rmi_smb->client;
int retval;
/* Check if for SMBus new version device by reading version byte. */
retval = i2c_smbus_read_byte_data(client, SMB_PROTOCOL_VERSION_ADDRESS);
if (retval < 0) {
dev_err(&client->dev, "failed to get SMBus version number!\n");
return retval;
}
return retval + 1;
}
/* SMB block write - wrapper over ic2_smb_write_block */
static int smb_block_write(struct rmi_transport_dev *xport,
u8 commandcode, const void *buf, size_t len)
{
struct rmi_smb_xport *rmi_smb =
container_of(xport, struct rmi_smb_xport, xport);
struct i2c_client *client = rmi_smb->client;
int retval;
retval = i2c_smbus_write_block_data(client, commandcode, len, buf);
rmi_dbg(RMI_DEBUG_XPORT, &client->dev,
"wrote %zd bytes at %#04x: %d (%*ph)\n",
len, commandcode, retval, (int)len, buf);
return retval;
}
/*
* The function to get command code for smbus operations and keeps
* records to the driver mapping table
*/
static int rmi_smb_get_command_code(struct rmi_transport_dev *xport,
u16 rmiaddr, int bytecount, bool isread, u8 *commandcode)
{
struct rmi_smb_xport *rmi_smb =
container_of(xport, struct rmi_smb_xport, xport);
struct mapping_table_entry new_map;
int i;
int retval = 0;
mutex_lock(&rmi_smb->mappingtable_mutex);
for (i = 0; i < RMI_SMB2_MAP_SIZE; i++) {
struct mapping_table_entry *entry = &rmi_smb->mapping_table[i];
if (le16_to_cpu(entry->rmiaddr) == rmiaddr) {
if (isread) {
if (entry->readcount == bytecount)
goto exit;
} else {
if (entry->flags & RMI_SMB2_MAP_FLAGS_WE) {
goto exit;
}
}
}
}
i = rmi_smb->table_index;
rmi_smb->table_index = (i + 1) % RMI_SMB2_MAP_SIZE;
/* constructs mapping table data entry. 4 bytes each entry */
memset(&new_map, 0, sizeof(new_map));
new_map.rmiaddr = cpu_to_le16(rmiaddr);
new_map.readcount = bytecount;
new_map.flags = !isread ? RMI_SMB2_MAP_FLAGS_WE : 0;
retval = smb_block_write(xport, i + 0x80, &new_map, sizeof(new_map));
if (retval < 0) {
/*
* if not written to device mapping table
* clear the driver mapping table records
*/
memset(&new_map, 0, sizeof(new_map));
}
/* save to the driver level mapping table */
rmi_smb->mapping_table[i] = new_map;
exit:
mutex_unlock(&rmi_smb->mappingtable_mutex);
if (retval < 0)
return retval;
*commandcode = i;
return 0;
}
static int rmi_smb_write_block(struct rmi_transport_dev *xport, u16 rmiaddr,
const void *databuff, size_t len)
{
int retval = 0;
u8 commandcode;
struct rmi_smb_xport *rmi_smb =
container_of(xport, struct rmi_smb_xport, xport);
int cur_len = (int)len;
mutex_lock(&rmi_smb->page_mutex);
while (cur_len > 0) {
/*
* break into 32 bytes chunks to write get command code
*/
int block_len = min_t(int, len, SMB_MAX_COUNT);
retval = rmi_smb_get_command_code(xport, rmiaddr, block_len,
false, &commandcode);
if (retval < 0)
goto exit;
retval = smb_block_write(xport, commandcode,
databuff, block_len);
if (retval < 0)
goto exit;
/* prepare to write next block of bytes */
cur_len -= SMB_MAX_COUNT;
databuff += SMB_MAX_COUNT;
rmiaddr += SMB_MAX_COUNT;
}
exit:
mutex_unlock(&rmi_smb->page_mutex);
return retval;
}
/* SMB block read - wrapper over ic2_smb_read_block */
static int smb_block_read(struct rmi_transport_dev *xport,
u8 commandcode, void *buf, size_t len)
{
struct rmi_smb_xport *rmi_smb =
container_of(xport, struct rmi_smb_xport, xport);
struct i2c_client *client = rmi_smb->client;
int retval;
retval = i2c_smbus_read_block_data(client, commandcode, buf);
if (retval < 0)
return retval;
return retval;
}
static int rmi_smb_read_block(struct rmi_transport_dev *xport, u16 rmiaddr,
void *databuff, size_t len)
{
struct rmi_smb_xport *rmi_smb =
container_of(xport, struct rmi_smb_xport, xport);
int retval;
u8 commandcode;
int cur_len = (int)len;
mutex_lock(&rmi_smb->page_mutex);
memset(databuff, 0, len);
while (cur_len > 0) {
/* break into 32 bytes chunks to write get command code */
int block_len = min_t(int, cur_len, SMB_MAX_COUNT);
retval = rmi_smb_get_command_code(xport, rmiaddr, block_len,
true, &commandcode);
if (retval < 0)
goto exit;
retval = smb_block_read(xport, commandcode,
databuff, block_len);
if (retval < 0)
goto exit;
/* prepare to read next block of bytes */
cur_len -= SMB_MAX_COUNT;
databuff += SMB_MAX_COUNT;
rmiaddr += SMB_MAX_COUNT;
}
retval = 0;
exit:
mutex_unlock(&rmi_smb->page_mutex);
return retval;
}
static void rmi_smb_clear_state(struct rmi_smb_xport *rmi_smb)
{
/* the mapping table has been flushed, discard the current one */
mutex_lock(&rmi_smb->mappingtable_mutex);
memset(rmi_smb->mapping_table, 0, sizeof(rmi_smb->mapping_table));
mutex_unlock(&rmi_smb->mappingtable_mutex);
}
static int rmi_smb_enable_smbus_mode(struct rmi_smb_xport *rmi_smb)
{
int retval;
/* we need to get the smbus version to activate the touchpad */
retval = rmi_smb_get_version(rmi_smb);
if (retval < 0)
return retval;
return 0;
}
static int rmi_smb_reset(struct rmi_transport_dev *xport, u16 reset_addr)
{
struct rmi_smb_xport *rmi_smb =
container_of(xport, struct rmi_smb_xport, xport);
rmi_smb_clear_state(rmi_smb);
/*
* we do not call the actual reset command, it has to be handled in
* PS/2 or there will be races between PS/2 and SMBus.
* PS/2 should ensure that a psmouse_reset is called before
* intializing the device and after it has been removed to be in a known
* state.
*/
return rmi_smb_enable_smbus_mode(rmi_smb);
}
static const struct rmi_transport_ops rmi_smb_ops = {
.write_block = rmi_smb_write_block,
.read_block = rmi_smb_read_block,
.reset = rmi_smb_reset,
};
static int rmi_smb_probe(struct i2c_client *client)
{
struct rmi_device_platform_data *pdata = dev_get_platdata(&client->dev);
struct rmi_smb_xport *rmi_smb;
int smbus_version;
int error;
if (!pdata) {
dev_err(&client->dev, "no platform data, aborting\n");
return -ENOMEM;
}
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_READ_BLOCK_DATA |
I2C_FUNC_SMBUS_HOST_NOTIFY)) {
dev_err(&client->dev,
"adapter does not support required functionality\n");
return -ENODEV;
}
if (client->irq <= 0) {
dev_err(&client->dev, "no IRQ provided, giving up\n");
return client->irq ? client->irq : -ENODEV;
}
rmi_smb = devm_kzalloc(&client->dev, sizeof(struct rmi_smb_xport),
GFP_KERNEL);
if (!rmi_smb)
return -ENOMEM;
rmi_dbg(RMI_DEBUG_XPORT, &client->dev, "Probing %s\n",
dev_name(&client->dev));
rmi_smb->client = client;
mutex_init(&rmi_smb->page_mutex);
mutex_init(&rmi_smb->mappingtable_mutex);
rmi_smb->xport.dev = &client->dev;
rmi_smb->xport.pdata = *pdata;
rmi_smb->xport.pdata.irq = client->irq;
rmi_smb->xport.proto_name = "smb";
rmi_smb->xport.ops = &rmi_smb_ops;
smbus_version = rmi_smb_get_version(rmi_smb);
if (smbus_version < 0)
return smbus_version;
rmi_dbg(RMI_DEBUG_XPORT, &client->dev, "Smbus version is %d",
smbus_version);
if (smbus_version != 2 && smbus_version != 3) {
dev_err(&client->dev, "Unrecognized SMB version %d\n",
smbus_version);
return -ENODEV;
}
i2c_set_clientdata(client, rmi_smb);
dev_info(&client->dev, "registering SMbus-connected sensor\n");
error = rmi_register_transport_device(&rmi_smb->xport);
if (error) {
dev_err(&client->dev, "failed to register sensor: %d\n", error);
return error;
}
return 0;
}
static void rmi_smb_remove(struct i2c_client *client)
{
struct rmi_smb_xport *rmi_smb = i2c_get_clientdata(client);
rmi_unregister_transport_device(&rmi_smb->xport);
}
static int rmi_smb_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct rmi_smb_xport *rmi_smb = i2c_get_clientdata(client);
int ret;
ret = rmi_driver_suspend(rmi_smb->xport.rmi_dev, true);
if (ret)
dev_warn(dev, "Failed to suspend device: %d\n", ret);
return ret;
}
static int rmi_smb_runtime_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct rmi_smb_xport *rmi_smb = i2c_get_clientdata(client);
int ret;
ret = rmi_driver_suspend(rmi_smb->xport.rmi_dev, false);
if (ret)
dev_warn(dev, "Failed to suspend device: %d\n", ret);
return ret;
}
static int rmi_smb_resume(struct device *dev)
{
struct i2c_client *client = container_of(dev, struct i2c_client, dev);
struct rmi_smb_xport *rmi_smb = i2c_get_clientdata(client);
struct rmi_device *rmi_dev = rmi_smb->xport.rmi_dev;
int ret;
rmi_smb_reset(&rmi_smb->xport, 0);
rmi_reset(rmi_dev);
ret = rmi_driver_resume(rmi_smb->xport.rmi_dev, true);
if (ret)
dev_warn(dev, "Failed to resume device: %d\n", ret);
return 0;
}
static int rmi_smb_runtime_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct rmi_smb_xport *rmi_smb = i2c_get_clientdata(client);
int ret;
ret = rmi_driver_resume(rmi_smb->xport.rmi_dev, false);
if (ret)
dev_warn(dev, "Failed to resume device: %d\n", ret);
return 0;
}
static const struct dev_pm_ops rmi_smb_pm = {
SYSTEM_SLEEP_PM_OPS(rmi_smb_suspend, rmi_smb_resume)
RUNTIME_PM_OPS(rmi_smb_runtime_suspend, rmi_smb_runtime_resume, NULL)
};
static const struct i2c_device_id rmi_id[] = {
{ "rmi4_smbus", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, rmi_id);
static struct i2c_driver rmi_smb_driver = {
.driver = {
.name = "rmi4_smbus",
.pm = pm_ptr(&rmi_smb_pm),
},
.id_table = rmi_id,
.probe = rmi_smb_probe,
.remove = rmi_smb_remove,
};
module_i2c_driver(rmi_smb_driver);
MODULE_AUTHOR("Andrew Duggan <[email protected]>");
MODULE_AUTHOR("Benjamin Tissoires <[email protected]>");
MODULE_DESCRIPTION("RMI4 SMBus driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/rmi4/rmi_smbus.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2012-2016 Synaptics Incorporated
*/
#include <linux/kernel.h>
#include <linux/rmi.h>
#include <linux/input.h>
#include <linux/slab.h>
#include "rmi_driver.h"
#define RMI_F30_QUERY_SIZE 2
/* Defs for Query 0 */
#define RMI_F30_EXTENDED_PATTERNS 0x01
#define RMI_F30_HAS_MAPPABLE_BUTTONS BIT(1)
#define RMI_F30_HAS_LED BIT(2)
#define RMI_F30_HAS_GPIO BIT(3)
#define RMI_F30_HAS_HAPTIC BIT(4)
#define RMI_F30_HAS_GPIO_DRV_CTL BIT(5)
#define RMI_F30_HAS_MECH_MOUSE_BTNS BIT(6)
/* Defs for Query 1 */
#define RMI_F30_GPIO_LED_COUNT 0x1F
/* Defs for Control Registers */
#define RMI_F30_CTRL_1_GPIO_DEBOUNCE 0x01
#define RMI_F30_CTRL_1_HALT BIT(4)
#define RMI_F30_CTRL_1_HALTED BIT(5)
#define RMI_F30_CTRL_10_NUM_MECH_MOUSE_BTNS 0x03
#define RMI_F30_CTRL_MAX_REGS 32
#define RMI_F30_CTRL_MAX_BYTES DIV_ROUND_UP(RMI_F30_CTRL_MAX_REGS, 8)
#define RMI_F30_CTRL_MAX_REG_BLOCKS 11
#define RMI_F30_CTRL_REGS_MAX_SIZE (RMI_F30_CTRL_MAX_BYTES \
+ 1 \
+ RMI_F30_CTRL_MAX_BYTES \
+ RMI_F30_CTRL_MAX_BYTES \
+ RMI_F30_CTRL_MAX_BYTES \
+ 6 \
+ RMI_F30_CTRL_MAX_REGS \
+ RMI_F30_CTRL_MAX_REGS \
+ RMI_F30_CTRL_MAX_BYTES \
+ 1 \
+ 1)
#define TRACKSTICK_RANGE_START 3
#define TRACKSTICK_RANGE_END 6
struct rmi_f30_ctrl_data {
int address;
int length;
u8 *regs;
};
struct f30_data {
/* Query Data */
bool has_extended_pattern;
bool has_mappable_buttons;
bool has_led;
bool has_gpio;
bool has_haptic;
bool has_gpio_driver_control;
bool has_mech_mouse_btns;
u8 gpioled_count;
u8 register_count;
/* Control Register Data */
struct rmi_f30_ctrl_data ctrl[RMI_F30_CTRL_MAX_REG_BLOCKS];
u8 ctrl_regs[RMI_F30_CTRL_REGS_MAX_SIZE];
u32 ctrl_regs_size;
u8 data_regs[RMI_F30_CTRL_MAX_BYTES];
u16 *gpioled_key_map;
struct input_dev *input;
struct rmi_function *f03;
bool trackstick_buttons;
};
static int rmi_f30_read_control_parameters(struct rmi_function *fn,
struct f30_data *f30)
{
int error;
error = rmi_read_block(fn->rmi_dev, fn->fd.control_base_addr,
f30->ctrl_regs, f30->ctrl_regs_size);
if (error) {
dev_err(&fn->dev,
"%s: Could not read control registers at 0x%x: %d\n",
__func__, fn->fd.control_base_addr, error);
return error;
}
return 0;
}
static void rmi_f30_report_button(struct rmi_function *fn,
struct f30_data *f30, unsigned int button)
{
unsigned int reg_num = button >> 3;
unsigned int bit_num = button & 0x07;
u16 key_code = f30->gpioled_key_map[button];
bool key_down = !(f30->data_regs[reg_num] & BIT(bit_num));
if (f30->trackstick_buttons &&
button >= TRACKSTICK_RANGE_START &&
button <= TRACKSTICK_RANGE_END) {
rmi_f03_overwrite_button(f30->f03, key_code, key_down);
} else {
rmi_dbg(RMI_DEBUG_FN, &fn->dev,
"%s: call input report key (0x%04x) value (0x%02x)",
__func__, key_code, key_down);
input_report_key(f30->input, key_code, key_down);
}
}
static irqreturn_t rmi_f30_attention(int irq, void *ctx)
{
struct rmi_function *fn = ctx;
struct f30_data *f30 = dev_get_drvdata(&fn->dev);
struct rmi_driver_data *drvdata = dev_get_drvdata(&fn->rmi_dev->dev);
int error;
int i;
/* Read the gpi led data. */
if (drvdata->attn_data.data) {
if (drvdata->attn_data.size < f30->register_count) {
dev_warn(&fn->dev,
"F30 interrupted, but data is missing\n");
return IRQ_HANDLED;
}
memcpy(f30->data_regs, drvdata->attn_data.data,
f30->register_count);
drvdata->attn_data.data += f30->register_count;
drvdata->attn_data.size -= f30->register_count;
} else {
error = rmi_read_block(fn->rmi_dev, fn->fd.data_base_addr,
f30->data_regs, f30->register_count);
if (error) {
dev_err(&fn->dev,
"%s: Failed to read F30 data registers: %d\n",
__func__, error);
return IRQ_RETVAL(error);
}
}
if (f30->has_gpio) {
for (i = 0; i < f30->gpioled_count; i++)
if (f30->gpioled_key_map[i] != KEY_RESERVED)
rmi_f30_report_button(fn, f30, i);
if (f30->trackstick_buttons)
rmi_f03_commit_buttons(f30->f03);
}
return IRQ_HANDLED;
}
static int rmi_f30_config(struct rmi_function *fn)
{
struct f30_data *f30 = dev_get_drvdata(&fn->dev);
struct rmi_driver *drv = fn->rmi_dev->driver;
const struct rmi_device_platform_data *pdata =
rmi_get_platform_data(fn->rmi_dev);
int error;
/* can happen if gpio_data.disable is set */
if (!f30)
return 0;
if (pdata->gpio_data.trackstick_buttons) {
/* Try [re-]establish link to F03. */
f30->f03 = rmi_find_function(fn->rmi_dev, 0x03);
f30->trackstick_buttons = f30->f03 != NULL;
}
if (pdata->gpio_data.disable) {
drv->clear_irq_bits(fn->rmi_dev, fn->irq_mask);
} else {
/* Write Control Register values back to device */
error = rmi_write_block(fn->rmi_dev, fn->fd.control_base_addr,
f30->ctrl_regs, f30->ctrl_regs_size);
if (error) {
dev_err(&fn->dev,
"%s: Could not write control registers at 0x%x: %d\n",
__func__, fn->fd.control_base_addr, error);
return error;
}
drv->set_irq_bits(fn->rmi_dev, fn->irq_mask);
}
return 0;
}
static void rmi_f30_set_ctrl_data(struct rmi_f30_ctrl_data *ctrl,
int *ctrl_addr, int len, u8 **reg)
{
ctrl->address = *ctrl_addr;
ctrl->length = len;
ctrl->regs = *reg;
*ctrl_addr += len;
*reg += len;
}
static bool rmi_f30_is_valid_button(int button, struct rmi_f30_ctrl_data *ctrl)
{
int byte_position = button >> 3;
int bit_position = button & 0x07;
/*
* ctrl2 -> dir == 0 -> input mode
* ctrl3 -> data == 1 -> actual button
*/
return !(ctrl[2].regs[byte_position] & BIT(bit_position)) &&
(ctrl[3].regs[byte_position] & BIT(bit_position));
}
static int rmi_f30_map_gpios(struct rmi_function *fn,
struct f30_data *f30)
{
const struct rmi_device_platform_data *pdata =
rmi_get_platform_data(fn->rmi_dev);
struct input_dev *input = f30->input;
unsigned int button = BTN_LEFT;
unsigned int trackstick_button = BTN_LEFT;
bool button_mapped = false;
int i;
int button_count = min_t(u8, f30->gpioled_count, TRACKSTICK_RANGE_END);
f30->gpioled_key_map = devm_kcalloc(&fn->dev,
button_count,
sizeof(f30->gpioled_key_map[0]),
GFP_KERNEL);
if (!f30->gpioled_key_map) {
dev_err(&fn->dev, "Failed to allocate gpioled map memory.\n");
return -ENOMEM;
}
for (i = 0; i < button_count; i++) {
if (!rmi_f30_is_valid_button(i, f30->ctrl))
continue;
if (pdata->gpio_data.trackstick_buttons &&
i >= TRACKSTICK_RANGE_START && i < TRACKSTICK_RANGE_END) {
f30->gpioled_key_map[i] = trackstick_button++;
} else if (!pdata->gpio_data.buttonpad || !button_mapped) {
f30->gpioled_key_map[i] = button;
input_set_capability(input, EV_KEY, button++);
button_mapped = true;
}
}
input->keycode = f30->gpioled_key_map;
input->keycodesize = sizeof(f30->gpioled_key_map[0]);
input->keycodemax = f30->gpioled_count;
/*
* Buttonpad could be also inferred from f30->has_mech_mouse_btns,
* but I am not sure, so use only the pdata info and the number of
* mapped buttons.
*/
if (pdata->gpio_data.buttonpad || (button - BTN_LEFT == 1))
__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
return 0;
}
static int rmi_f30_initialize(struct rmi_function *fn, struct f30_data *f30)
{
u8 *ctrl_reg = f30->ctrl_regs;
int control_address = fn->fd.control_base_addr;
u8 buf[RMI_F30_QUERY_SIZE];
int error;
error = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr,
buf, RMI_F30_QUERY_SIZE);
if (error) {
dev_err(&fn->dev, "Failed to read query register\n");
return error;
}
f30->has_extended_pattern = buf[0] & RMI_F30_EXTENDED_PATTERNS;
f30->has_mappable_buttons = buf[0] & RMI_F30_HAS_MAPPABLE_BUTTONS;
f30->has_led = buf[0] & RMI_F30_HAS_LED;
f30->has_gpio = buf[0] & RMI_F30_HAS_GPIO;
f30->has_haptic = buf[0] & RMI_F30_HAS_HAPTIC;
f30->has_gpio_driver_control = buf[0] & RMI_F30_HAS_GPIO_DRV_CTL;
f30->has_mech_mouse_btns = buf[0] & RMI_F30_HAS_MECH_MOUSE_BTNS;
f30->gpioled_count = buf[1] & RMI_F30_GPIO_LED_COUNT;
f30->register_count = DIV_ROUND_UP(f30->gpioled_count, 8);
if (f30->has_gpio && f30->has_led)
rmi_f30_set_ctrl_data(&f30->ctrl[0], &control_address,
f30->register_count, &ctrl_reg);
rmi_f30_set_ctrl_data(&f30->ctrl[1], &control_address,
sizeof(u8), &ctrl_reg);
if (f30->has_gpio) {
rmi_f30_set_ctrl_data(&f30->ctrl[2], &control_address,
f30->register_count, &ctrl_reg);
rmi_f30_set_ctrl_data(&f30->ctrl[3], &control_address,
f30->register_count, &ctrl_reg);
}
if (f30->has_led) {
rmi_f30_set_ctrl_data(&f30->ctrl[4], &control_address,
f30->register_count, &ctrl_reg);
rmi_f30_set_ctrl_data(&f30->ctrl[5], &control_address,
f30->has_extended_pattern ? 6 : 2,
&ctrl_reg);
}
if (f30->has_led || f30->has_gpio_driver_control) {
/* control 6 uses a byte per gpio/led */
rmi_f30_set_ctrl_data(&f30->ctrl[6], &control_address,
f30->gpioled_count, &ctrl_reg);
}
if (f30->has_mappable_buttons) {
/* control 7 uses a byte per gpio/led */
rmi_f30_set_ctrl_data(&f30->ctrl[7], &control_address,
f30->gpioled_count, &ctrl_reg);
}
if (f30->has_haptic) {
rmi_f30_set_ctrl_data(&f30->ctrl[8], &control_address,
f30->register_count, &ctrl_reg);
rmi_f30_set_ctrl_data(&f30->ctrl[9], &control_address,
sizeof(u8), &ctrl_reg);
}
if (f30->has_mech_mouse_btns)
rmi_f30_set_ctrl_data(&f30->ctrl[10], &control_address,
sizeof(u8), &ctrl_reg);
f30->ctrl_regs_size = ctrl_reg -
f30->ctrl_regs ?: RMI_F30_CTRL_REGS_MAX_SIZE;
error = rmi_f30_read_control_parameters(fn, f30);
if (error) {
dev_err(&fn->dev,
"Failed to initialize F30 control params: %d\n",
error);
return error;
}
if (f30->has_gpio) {
error = rmi_f30_map_gpios(fn, f30);
if (error)
return error;
}
return 0;
}
static int rmi_f30_probe(struct rmi_function *fn)
{
struct rmi_device *rmi_dev = fn->rmi_dev;
const struct rmi_device_platform_data *pdata =
rmi_get_platform_data(rmi_dev);
struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
struct f30_data *f30;
int error;
if (pdata->gpio_data.disable)
return 0;
if (!drv_data->input) {
dev_info(&fn->dev, "F30: no input device found, ignoring\n");
return -ENXIO;
}
f30 = devm_kzalloc(&fn->dev, sizeof(*f30), GFP_KERNEL);
if (!f30)
return -ENOMEM;
f30->input = drv_data->input;
error = rmi_f30_initialize(fn, f30);
if (error)
return error;
dev_set_drvdata(&fn->dev, f30);
return 0;
}
struct rmi_function_handler rmi_f30_handler = {
.driver = {
.name = "rmi4_f30",
},
.func = 0x30,
.probe = rmi_f30_probe,
.config = rmi_f30_config,
.attention = rmi_f30_attention,
};
|
linux-master
|
drivers/input/rmi4/rmi_f30.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2016, Zodiac Inflight Innovations
* Copyright (c) 2007-2016, Synaptics Incorporated
* Copyright (C) 2012 Alexandra Chin <[email protected]>
* Copyright (C) 2012 Scott Lin <[email protected]>
*/
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/rmi.h>
#include <linux/firmware.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <asm/unaligned.h>
#include "rmi_driver.h"
#include "rmi_f34.h"
static int rmi_f34v7_read_flash_status(struct f34_data *f34)
{
u8 status;
u8 command;
int ret;
ret = rmi_read_block(f34->fn->rmi_dev,
f34->fn->fd.data_base_addr + V7_FLASH_STATUS_OFFSET,
&status,
sizeof(status));
if (ret < 0) {
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
"%s: Error %d reading flash status\n", __func__, ret);
return ret;
}
f34->v7.in_bl_mode = status >> 7;
f34->v7.flash_status = status & 0x1f;
if (f34->v7.flash_status != 0x00) {
dev_err(&f34->fn->dev, "%s: status=%d, command=0x%02x\n",
__func__, f34->v7.flash_status, f34->v7.command);
}
ret = rmi_read_block(f34->fn->rmi_dev,
f34->fn->fd.data_base_addr + V7_COMMAND_OFFSET,
&command,
sizeof(command));
if (ret < 0) {
dev_err(&f34->fn->dev, "%s: Failed to read flash command\n",
__func__);
return ret;
}
f34->v7.command = command;
return 0;
}
static int rmi_f34v7_wait_for_idle(struct f34_data *f34, int timeout_ms)
{
unsigned long timeout;
timeout = msecs_to_jiffies(timeout_ms);
if (!wait_for_completion_timeout(&f34->v7.cmd_done, timeout)) {
dev_warn(&f34->fn->dev, "%s: Timed out waiting for idle status\n",
__func__);
return -ETIMEDOUT;
}
return 0;
}
static int rmi_f34v7_check_command_status(struct f34_data *f34, int timeout_ms)
{
int ret;
ret = rmi_f34v7_wait_for_idle(f34, timeout_ms);
if (ret < 0)
return ret;
ret = rmi_f34v7_read_flash_status(f34);
if (ret < 0)
return ret;
if (f34->v7.flash_status != 0x00)
return -EIO;
return 0;
}
static int rmi_f34v7_write_command_single_transaction(struct f34_data *f34,
u8 cmd)
{
int ret;
u8 base;
struct f34v7_data_1_5 data_1_5;
base = f34->fn->fd.data_base_addr;
memset(&data_1_5, 0, sizeof(data_1_5));
switch (cmd) {
case v7_CMD_ERASE_ALL:
data_1_5.partition_id = CORE_CODE_PARTITION;
data_1_5.command = CMD_V7_ERASE_AP;
break;
case v7_CMD_ERASE_UI_FIRMWARE:
data_1_5.partition_id = CORE_CODE_PARTITION;
data_1_5.command = CMD_V7_ERASE;
break;
case v7_CMD_ERASE_BL_CONFIG:
data_1_5.partition_id = GLOBAL_PARAMETERS_PARTITION;
data_1_5.command = CMD_V7_ERASE;
break;
case v7_CMD_ERASE_UI_CONFIG:
data_1_5.partition_id = CORE_CONFIG_PARTITION;
data_1_5.command = CMD_V7_ERASE;
break;
case v7_CMD_ERASE_DISP_CONFIG:
data_1_5.partition_id = DISPLAY_CONFIG_PARTITION;
data_1_5.command = CMD_V7_ERASE;
break;
case v7_CMD_ERASE_FLASH_CONFIG:
data_1_5.partition_id = FLASH_CONFIG_PARTITION;
data_1_5.command = CMD_V7_ERASE;
break;
case v7_CMD_ERASE_GUEST_CODE:
data_1_5.partition_id = GUEST_CODE_PARTITION;
data_1_5.command = CMD_V7_ERASE;
break;
case v7_CMD_ENABLE_FLASH_PROG:
data_1_5.partition_id = BOOTLOADER_PARTITION;
data_1_5.command = CMD_V7_ENTER_BL;
break;
}
data_1_5.payload[0] = f34->bootloader_id[0];
data_1_5.payload[1] = f34->bootloader_id[1];
ret = rmi_write_block(f34->fn->rmi_dev,
base + V7_PARTITION_ID_OFFSET,
&data_1_5, sizeof(data_1_5));
if (ret < 0) {
dev_err(&f34->fn->dev,
"%s: Failed to write single transaction command\n",
__func__);
return ret;
}
return 0;
}
static int rmi_f34v7_write_command(struct f34_data *f34, u8 cmd)
{
int ret;
u8 base;
u8 command;
base = f34->fn->fd.data_base_addr;
switch (cmd) {
case v7_CMD_WRITE_FW:
case v7_CMD_WRITE_CONFIG:
case v7_CMD_WRITE_GUEST_CODE:
command = CMD_V7_WRITE;
break;
case v7_CMD_READ_CONFIG:
command = CMD_V7_READ;
break;
case v7_CMD_ERASE_ALL:
command = CMD_V7_ERASE_AP;
break;
case v7_CMD_ERASE_UI_FIRMWARE:
case v7_CMD_ERASE_BL_CONFIG:
case v7_CMD_ERASE_UI_CONFIG:
case v7_CMD_ERASE_DISP_CONFIG:
case v7_CMD_ERASE_FLASH_CONFIG:
case v7_CMD_ERASE_GUEST_CODE:
command = CMD_V7_ERASE;
break;
case v7_CMD_ENABLE_FLASH_PROG:
command = CMD_V7_ENTER_BL;
break;
default:
dev_err(&f34->fn->dev, "%s: Invalid command 0x%02x\n",
__func__, cmd);
return -EINVAL;
}
f34->v7.command = command;
switch (cmd) {
case v7_CMD_ERASE_ALL:
case v7_CMD_ERASE_UI_FIRMWARE:
case v7_CMD_ERASE_BL_CONFIG:
case v7_CMD_ERASE_UI_CONFIG:
case v7_CMD_ERASE_DISP_CONFIG:
case v7_CMD_ERASE_FLASH_CONFIG:
case v7_CMD_ERASE_GUEST_CODE:
case v7_CMD_ENABLE_FLASH_PROG:
ret = rmi_f34v7_write_command_single_transaction(f34, cmd);
if (ret < 0)
return ret;
else
return 0;
default:
break;
}
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev, "%s: writing cmd %02X\n",
__func__, command);
ret = rmi_write_block(f34->fn->rmi_dev,
base + V7_COMMAND_OFFSET,
&command, sizeof(command));
if (ret < 0) {
dev_err(&f34->fn->dev, "%s: Failed to write flash command\n",
__func__);
return ret;
}
return 0;
}
static int rmi_f34v7_write_partition_id(struct f34_data *f34, u8 cmd)
{
int ret;
u8 base;
u8 partition;
base = f34->fn->fd.data_base_addr;
switch (cmd) {
case v7_CMD_WRITE_FW:
partition = CORE_CODE_PARTITION;
break;
case v7_CMD_WRITE_CONFIG:
case v7_CMD_READ_CONFIG:
if (f34->v7.config_area == v7_UI_CONFIG_AREA)
partition = CORE_CONFIG_PARTITION;
else if (f34->v7.config_area == v7_DP_CONFIG_AREA)
partition = DISPLAY_CONFIG_PARTITION;
else if (f34->v7.config_area == v7_PM_CONFIG_AREA)
partition = GUEST_SERIALIZATION_PARTITION;
else if (f34->v7.config_area == v7_BL_CONFIG_AREA)
partition = GLOBAL_PARAMETERS_PARTITION;
else if (f34->v7.config_area == v7_FLASH_CONFIG_AREA)
partition = FLASH_CONFIG_PARTITION;
break;
case v7_CMD_WRITE_GUEST_CODE:
partition = GUEST_CODE_PARTITION;
break;
case v7_CMD_ERASE_ALL:
partition = CORE_CODE_PARTITION;
break;
case v7_CMD_ERASE_BL_CONFIG:
partition = GLOBAL_PARAMETERS_PARTITION;
break;
case v7_CMD_ERASE_UI_CONFIG:
partition = CORE_CONFIG_PARTITION;
break;
case v7_CMD_ERASE_DISP_CONFIG:
partition = DISPLAY_CONFIG_PARTITION;
break;
case v7_CMD_ERASE_FLASH_CONFIG:
partition = FLASH_CONFIG_PARTITION;
break;
case v7_CMD_ERASE_GUEST_CODE:
partition = GUEST_CODE_PARTITION;
break;
case v7_CMD_ENABLE_FLASH_PROG:
partition = BOOTLOADER_PARTITION;
break;
default:
dev_err(&f34->fn->dev, "%s: Invalid command 0x%02x\n",
__func__, cmd);
return -EINVAL;
}
ret = rmi_write_block(f34->fn->rmi_dev,
base + V7_PARTITION_ID_OFFSET,
&partition, sizeof(partition));
if (ret < 0) {
dev_err(&f34->fn->dev, "%s: Failed to write partition ID\n",
__func__);
return ret;
}
return 0;
}
static int rmi_f34v7_read_partition_table(struct f34_data *f34)
{
int ret;
unsigned long timeout;
u8 base;
__le16 length;
u16 block_number = 0;
base = f34->fn->fd.data_base_addr;
f34->v7.config_area = v7_FLASH_CONFIG_AREA;
ret = rmi_f34v7_write_partition_id(f34, v7_CMD_READ_CONFIG);
if (ret < 0)
return ret;
ret = rmi_write_block(f34->fn->rmi_dev,
base + V7_BLOCK_NUMBER_OFFSET,
&block_number, sizeof(block_number));
if (ret < 0) {
dev_err(&f34->fn->dev, "%s: Failed to write block number\n",
__func__);
return ret;
}
put_unaligned_le16(f34->v7.flash_config_length, &length);
ret = rmi_write_block(f34->fn->rmi_dev,
base + V7_TRANSFER_LENGTH_OFFSET,
&length, sizeof(length));
if (ret < 0) {
dev_err(&f34->fn->dev, "%s: Failed to write transfer length\n",
__func__);
return ret;
}
init_completion(&f34->v7.cmd_done);
ret = rmi_f34v7_write_command(f34, v7_CMD_READ_CONFIG);
if (ret < 0) {
dev_err(&f34->fn->dev, "%s: Failed to write command\n",
__func__);
return ret;
}
/*
* rmi_f34v7_check_command_status() can't be used here, as this
* function is called before IRQs are available
*/
timeout = msecs_to_jiffies(F34_WRITE_WAIT_MS);
while (time_before(jiffies, timeout)) {
usleep_range(5000, 6000);
rmi_f34v7_read_flash_status(f34);
if (f34->v7.command == v7_CMD_IDLE &&
f34->v7.flash_status == 0x00) {
break;
}
}
ret = rmi_read_block(f34->fn->rmi_dev,
base + V7_PAYLOAD_OFFSET,
f34->v7.read_config_buf,
f34->v7.partition_table_bytes);
if (ret < 0) {
dev_err(&f34->fn->dev, "%s: Failed to read block data\n",
__func__);
return ret;
}
return 0;
}
static void rmi_f34v7_parse_partition_table(struct f34_data *f34,
const void *partition_table,
struct block_count *blkcount,
struct physical_address *phyaddr)
{
int i;
int index;
u16 partition_length;
u16 physical_address;
const struct partition_table *ptable;
for (i = 0; i < f34->v7.partitions; i++) {
index = i * 8 + 2;
ptable = partition_table + index;
partition_length = le16_to_cpu(ptable->partition_length);
physical_address = le16_to_cpu(ptable->start_physical_address);
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
"%s: Partition entry %d: %*ph\n",
__func__, i, sizeof(struct partition_table), ptable);
switch (ptable->partition_id & 0x1f) {
case CORE_CODE_PARTITION:
blkcount->ui_firmware = partition_length;
phyaddr->ui_firmware = physical_address;
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
"%s: Core code block count: %d\n",
__func__, blkcount->ui_firmware);
break;
case CORE_CONFIG_PARTITION:
blkcount->ui_config = partition_length;
phyaddr->ui_config = physical_address;
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
"%s: Core config block count: %d\n",
__func__, blkcount->ui_config);
break;
case DISPLAY_CONFIG_PARTITION:
blkcount->dp_config = partition_length;
phyaddr->dp_config = physical_address;
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
"%s: Display config block count: %d\n",
__func__, blkcount->dp_config);
break;
case FLASH_CONFIG_PARTITION:
blkcount->fl_config = partition_length;
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
"%s: Flash config block count: %d\n",
__func__, blkcount->fl_config);
break;
case GUEST_CODE_PARTITION:
blkcount->guest_code = partition_length;
phyaddr->guest_code = physical_address;
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
"%s: Guest code block count: %d\n",
__func__, blkcount->guest_code);
break;
case GUEST_SERIALIZATION_PARTITION:
blkcount->pm_config = partition_length;
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
"%s: Guest serialization block count: %d\n",
__func__, blkcount->pm_config);
break;
case GLOBAL_PARAMETERS_PARTITION:
blkcount->bl_config = partition_length;
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
"%s: Global parameters block count: %d\n",
__func__, blkcount->bl_config);
break;
case DEVICE_CONFIG_PARTITION:
blkcount->lockdown = partition_length;
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
"%s: Device config block count: %d\n",
__func__, blkcount->lockdown);
break;
}
}
}
static int rmi_f34v7_read_queries_bl_version(struct f34_data *f34)
{
int ret;
u8 base;
int offset;
u8 query_0;
struct f34v7_query_1_7 query_1_7;
base = f34->fn->fd.query_base_addr;
ret = rmi_read_block(f34->fn->rmi_dev,
base,
&query_0,
sizeof(query_0));
if (ret < 0) {
dev_err(&f34->fn->dev,
"%s: Failed to read query 0\n", __func__);
return ret;
}
offset = (query_0 & 0x7) + 1;
ret = rmi_read_block(f34->fn->rmi_dev,
base + offset,
&query_1_7,
sizeof(query_1_7));
if (ret < 0) {
dev_err(&f34->fn->dev, "%s: Failed to read queries 1 to 7\n",
__func__);
return ret;
}
f34->bootloader_id[0] = query_1_7.bl_minor_revision;
f34->bootloader_id[1] = query_1_7.bl_major_revision;
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev, "Bootloader V%d.%d\n",
f34->bootloader_id[1], f34->bootloader_id[0]);
return 0;
}
static int rmi_f34v7_read_queries(struct f34_data *f34)
{
int ret;
int i;
u8 base;
int offset;
u8 *ptable;
u8 query_0;
struct f34v7_query_1_7 query_1_7;
base = f34->fn->fd.query_base_addr;
ret = rmi_read_block(f34->fn->rmi_dev,
base,
&query_0,
sizeof(query_0));
if (ret < 0) {
dev_err(&f34->fn->dev,
"%s: Failed to read query 0\n", __func__);
return ret;
}
offset = (query_0 & 0x07) + 1;
ret = rmi_read_block(f34->fn->rmi_dev,
base + offset,
&query_1_7,
sizeof(query_1_7));
if (ret < 0) {
dev_err(&f34->fn->dev, "%s: Failed to read queries 1 to 7\n",
__func__);
return ret;
}
f34->bootloader_id[0] = query_1_7.bl_minor_revision;
f34->bootloader_id[1] = query_1_7.bl_major_revision;
f34->v7.block_size = le16_to_cpu(query_1_7.block_size);
f34->v7.flash_config_length =
le16_to_cpu(query_1_7.flash_config_length);
f34->v7.payload_length = le16_to_cpu(query_1_7.payload_length);
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev, "%s: f34->v7.block_size = %d\n",
__func__, f34->v7.block_size);
f34->v7.has_display_cfg = query_1_7.partition_support[1] & HAS_DISP_CFG;
f34->v7.has_guest_code =
query_1_7.partition_support[1] & HAS_GUEST_CODE;
if (query_0 & HAS_CONFIG_ID) {
u8 f34_ctrl[CONFIG_ID_SIZE];
ret = rmi_read_block(f34->fn->rmi_dev,
f34->fn->fd.control_base_addr,
f34_ctrl,
sizeof(f34_ctrl));
if (ret)
return ret;
/* Eat leading zeros */
for (i = 0; i < sizeof(f34_ctrl) - 1 && !f34_ctrl[i]; i++)
/* Empty */;
snprintf(f34->configuration_id, sizeof(f34->configuration_id),
"%*phN", (int)sizeof(f34_ctrl) - i, f34_ctrl + i);
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev, "Configuration ID: %s\n",
f34->configuration_id);
}
f34->v7.partitions = 0;
for (i = 0; i < sizeof(query_1_7.partition_support); i++)
f34->v7.partitions += hweight8(query_1_7.partition_support[i]);
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev, "%s: Supported partitions: %*ph\n",
__func__, sizeof(query_1_7.partition_support),
query_1_7.partition_support);
f34->v7.partition_table_bytes = f34->v7.partitions * 8 + 2;
f34->v7.read_config_buf = devm_kzalloc(&f34->fn->dev,
f34->v7.partition_table_bytes,
GFP_KERNEL);
if (!f34->v7.read_config_buf) {
f34->v7.read_config_buf_size = 0;
return -ENOMEM;
}
f34->v7.read_config_buf_size = f34->v7.partition_table_bytes;
ptable = f34->v7.read_config_buf;
ret = rmi_f34v7_read_partition_table(f34);
if (ret < 0) {
dev_err(&f34->fn->dev, "%s: Failed to read partition table\n",
__func__);
return ret;
}
rmi_f34v7_parse_partition_table(f34, ptable,
&f34->v7.blkcount, &f34->v7.phyaddr);
return 0;
}
static int rmi_f34v7_check_bl_config_size(struct f34_data *f34)
{
u16 block_count;
block_count = f34->v7.img.bl_config.size / f34->v7.block_size;
f34->update_size += block_count;
if (block_count != f34->v7.blkcount.bl_config) {
dev_err(&f34->fn->dev, "Bootloader config size mismatch\n");
return -EINVAL;
}
return 0;
}
static int rmi_f34v7_erase_all(struct f34_data *f34)
{
int ret;
dev_info(&f34->fn->dev, "Erasing firmware...\n");
init_completion(&f34->v7.cmd_done);
ret = rmi_f34v7_write_command(f34, v7_CMD_ERASE_ALL);
if (ret < 0)
return ret;
ret = rmi_f34v7_check_command_status(f34, F34_ERASE_WAIT_MS);
if (ret < 0)
return ret;
return 0;
}
static int rmi_f34v7_read_blocks(struct f34_data *f34,
u16 block_cnt, u8 command)
{
int ret;
u8 base;
__le16 length;
u16 transfer;
u16 max_transfer;
u16 remaining = block_cnt;
u16 block_number = 0;
u16 index = 0;
base = f34->fn->fd.data_base_addr;
ret = rmi_f34v7_write_partition_id(f34, command);
if (ret < 0)
return ret;
ret = rmi_write_block(f34->fn->rmi_dev,
base + V7_BLOCK_NUMBER_OFFSET,
&block_number, sizeof(block_number));
if (ret < 0) {
dev_err(&f34->fn->dev, "%s: Failed to write block number\n",
__func__);
return ret;
}
max_transfer = min(f34->v7.payload_length,
(u16)(PAGE_SIZE / f34->v7.block_size));
do {
transfer = min(remaining, max_transfer);
put_unaligned_le16(transfer, &length);
ret = rmi_write_block(f34->fn->rmi_dev,
base + V7_TRANSFER_LENGTH_OFFSET,
&length, sizeof(length));
if (ret < 0) {
dev_err(&f34->fn->dev,
"%s: Write transfer length fail (%d remaining)\n",
__func__, remaining);
return ret;
}
init_completion(&f34->v7.cmd_done);
ret = rmi_f34v7_write_command(f34, command);
if (ret < 0)
return ret;
ret = rmi_f34v7_check_command_status(f34, F34_ENABLE_WAIT_MS);
if (ret < 0)
return ret;
ret = rmi_read_block(f34->fn->rmi_dev,
base + V7_PAYLOAD_OFFSET,
&f34->v7.read_config_buf[index],
transfer * f34->v7.block_size);
if (ret < 0) {
dev_err(&f34->fn->dev,
"%s: Read block failed (%d blks remaining)\n",
__func__, remaining);
return ret;
}
index += (transfer * f34->v7.block_size);
remaining -= transfer;
} while (remaining);
return 0;
}
static int rmi_f34v7_write_f34v7_blocks(struct f34_data *f34,
const void *block_ptr, u16 block_cnt,
u8 command)
{
int ret;
u8 base;
__le16 length;
u16 transfer;
u16 max_transfer;
u16 remaining = block_cnt;
u16 block_number = 0;
base = f34->fn->fd.data_base_addr;
ret = rmi_f34v7_write_partition_id(f34, command);
if (ret < 0)
return ret;
ret = rmi_write_block(f34->fn->rmi_dev,
base + V7_BLOCK_NUMBER_OFFSET,
&block_number, sizeof(block_number));
if (ret < 0) {
dev_err(&f34->fn->dev, "%s: Failed to write block number\n",
__func__);
return ret;
}
if (f34->v7.payload_length > (PAGE_SIZE / f34->v7.block_size))
max_transfer = PAGE_SIZE / f34->v7.block_size;
else
max_transfer = f34->v7.payload_length;
do {
transfer = min(remaining, max_transfer);
put_unaligned_le16(transfer, &length);
init_completion(&f34->v7.cmd_done);
ret = rmi_write_block(f34->fn->rmi_dev,
base + V7_TRANSFER_LENGTH_OFFSET,
&length, sizeof(length));
if (ret < 0) {
dev_err(&f34->fn->dev,
"%s: Write transfer length fail (%d remaining)\n",
__func__, remaining);
return ret;
}
ret = rmi_f34v7_write_command(f34, command);
if (ret < 0)
return ret;
ret = rmi_write_block(f34->fn->rmi_dev,
base + V7_PAYLOAD_OFFSET,
block_ptr, transfer * f34->v7.block_size);
if (ret < 0) {
dev_err(&f34->fn->dev,
"%s: Failed writing data (%d blks remaining)\n",
__func__, remaining);
return ret;
}
ret = rmi_f34v7_check_command_status(f34, F34_ENABLE_WAIT_MS);
if (ret < 0)
return ret;
block_ptr += (transfer * f34->v7.block_size);
remaining -= transfer;
f34->update_progress += transfer;
f34->update_status = (f34->update_progress * 100) /
f34->update_size;
} while (remaining);
return 0;
}
static int rmi_f34v7_write_config(struct f34_data *f34)
{
return rmi_f34v7_write_f34v7_blocks(f34, f34->v7.config_data,
f34->v7.config_block_count,
v7_CMD_WRITE_CONFIG);
}
static int rmi_f34v7_write_ui_config(struct f34_data *f34)
{
f34->v7.config_area = v7_UI_CONFIG_AREA;
f34->v7.config_data = f34->v7.img.ui_config.data;
f34->v7.config_size = f34->v7.img.ui_config.size;
f34->v7.config_block_count = f34->v7.config_size / f34->v7.block_size;
return rmi_f34v7_write_config(f34);
}
static int rmi_f34v7_write_dp_config(struct f34_data *f34)
{
f34->v7.config_area = v7_DP_CONFIG_AREA;
f34->v7.config_data = f34->v7.img.dp_config.data;
f34->v7.config_size = f34->v7.img.dp_config.size;
f34->v7.config_block_count = f34->v7.config_size / f34->v7.block_size;
return rmi_f34v7_write_config(f34);
}
static int rmi_f34v7_write_guest_code(struct f34_data *f34)
{
return rmi_f34v7_write_f34v7_blocks(f34, f34->v7.img.guest_code.data,
f34->v7.img.guest_code.size /
f34->v7.block_size,
v7_CMD_WRITE_GUEST_CODE);
}
static int rmi_f34v7_write_flash_config(struct f34_data *f34)
{
int ret;
f34->v7.config_area = v7_FLASH_CONFIG_AREA;
f34->v7.config_data = f34->v7.img.fl_config.data;
f34->v7.config_size = f34->v7.img.fl_config.size;
f34->v7.config_block_count = f34->v7.config_size / f34->v7.block_size;
if (f34->v7.config_block_count != f34->v7.blkcount.fl_config) {
dev_err(&f34->fn->dev, "%s: Flash config size mismatch\n",
__func__);
return -EINVAL;
}
init_completion(&f34->v7.cmd_done);
ret = rmi_f34v7_write_config(f34);
if (ret < 0)
return ret;
return 0;
}
static int rmi_f34v7_write_partition_table(struct f34_data *f34)
{
u16 block_count;
int ret;
block_count = f34->v7.blkcount.bl_config;
f34->v7.config_area = v7_BL_CONFIG_AREA;
f34->v7.config_size = f34->v7.block_size * block_count;
devm_kfree(&f34->fn->dev, f34->v7.read_config_buf);
f34->v7.read_config_buf = devm_kzalloc(&f34->fn->dev,
f34->v7.config_size, GFP_KERNEL);
if (!f34->v7.read_config_buf) {
f34->v7.read_config_buf_size = 0;
return -ENOMEM;
}
f34->v7.read_config_buf_size = f34->v7.config_size;
ret = rmi_f34v7_read_blocks(f34, block_count, v7_CMD_READ_CONFIG);
if (ret < 0)
return ret;
ret = rmi_f34v7_write_flash_config(f34);
if (ret < 0)
return ret;
f34->v7.config_area = v7_BL_CONFIG_AREA;
f34->v7.config_data = f34->v7.read_config_buf;
f34->v7.config_size = f34->v7.img.bl_config.size;
f34->v7.config_block_count = f34->v7.config_size / f34->v7.block_size;
ret = rmi_f34v7_write_config(f34);
if (ret < 0)
return ret;
return 0;
}
static int rmi_f34v7_write_firmware(struct f34_data *f34)
{
u16 blk_count;
blk_count = f34->v7.img.ui_firmware.size / f34->v7.block_size;
return rmi_f34v7_write_f34v7_blocks(f34, f34->v7.img.ui_firmware.data,
blk_count, v7_CMD_WRITE_FW);
}
static void rmi_f34v7_parse_img_header_10_bl_container(struct f34_data *f34,
const void *image)
{
int i;
int num_of_containers;
unsigned int addr;
unsigned int container_id;
unsigned int length;
const void *content;
const struct container_descriptor *descriptor;
num_of_containers = f34->v7.img.bootloader.size / 4 - 1;
for (i = 1; i <= num_of_containers; i++) {
addr = get_unaligned_le32(f34->v7.img.bootloader.data + i * 4);
descriptor = image + addr;
container_id = le16_to_cpu(descriptor->container_id);
content = image + le32_to_cpu(descriptor->content_address);
length = le32_to_cpu(descriptor->content_length);
switch (container_id) {
case BL_CONFIG_CONTAINER:
case GLOBAL_PARAMETERS_CONTAINER:
f34->v7.img.bl_config.data = content;
f34->v7.img.bl_config.size = length;
break;
case BL_LOCKDOWN_INFO_CONTAINER:
case DEVICE_CONFIG_CONTAINER:
f34->v7.img.lockdown.data = content;
f34->v7.img.lockdown.size = length;
break;
default:
break;
}
}
}
static void rmi_f34v7_parse_image_header_10(struct f34_data *f34)
{
unsigned int i;
unsigned int num_of_containers;
unsigned int addr;
unsigned int offset;
unsigned int container_id;
unsigned int length;
const void *image = f34->v7.image;
const u8 *content;
const struct container_descriptor *descriptor;
const struct image_header_10 *header = image;
f34->v7.img.checksum = le32_to_cpu(header->checksum);
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev, "%s: f34->v7.img.checksum=%X\n",
__func__, f34->v7.img.checksum);
/* address of top level container */
offset = le32_to_cpu(header->top_level_container_start_addr);
descriptor = image + offset;
/* address of top level container content */
offset = le32_to_cpu(descriptor->content_address);
num_of_containers = le32_to_cpu(descriptor->content_length) / 4;
for (i = 0; i < num_of_containers; i++) {
addr = get_unaligned_le32(image + offset);
offset += 4;
descriptor = image + addr;
container_id = le16_to_cpu(descriptor->container_id);
content = image + le32_to_cpu(descriptor->content_address);
length = le32_to_cpu(descriptor->content_length);
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
"%s: container_id=%d, length=%d\n", __func__,
container_id, length);
switch (container_id) {
case UI_CONTAINER:
case CORE_CODE_CONTAINER:
f34->v7.img.ui_firmware.data = content;
f34->v7.img.ui_firmware.size = length;
break;
case UI_CONFIG_CONTAINER:
case CORE_CONFIG_CONTAINER:
f34->v7.img.ui_config.data = content;
f34->v7.img.ui_config.size = length;
break;
case BL_CONTAINER:
f34->v7.img.bl_version = *content;
f34->v7.img.bootloader.data = content;
f34->v7.img.bootloader.size = length;
rmi_f34v7_parse_img_header_10_bl_container(f34, image);
break;
case GUEST_CODE_CONTAINER:
f34->v7.img.contains_guest_code = true;
f34->v7.img.guest_code.data = content;
f34->v7.img.guest_code.size = length;
break;
case DISPLAY_CONFIG_CONTAINER:
f34->v7.img.contains_display_cfg = true;
f34->v7.img.dp_config.data = content;
f34->v7.img.dp_config.size = length;
break;
case FLASH_CONFIG_CONTAINER:
f34->v7.img.contains_flash_config = true;
f34->v7.img.fl_config.data = content;
f34->v7.img.fl_config.size = length;
break;
case GENERAL_INFORMATION_CONTAINER:
f34->v7.img.contains_firmware_id = true;
f34->v7.img.firmware_id =
get_unaligned_le32(content + 4);
break;
default:
break;
}
}
}
static int rmi_f34v7_parse_image_info(struct f34_data *f34)
{
const struct image_header_10 *header = f34->v7.image;
memset(&f34->v7.img, 0x00, sizeof(f34->v7.img));
rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
"%s: header->major_header_version = %d\n",
__func__, header->major_header_version);
switch (header->major_header_version) {
case IMAGE_HEADER_VERSION_10:
rmi_f34v7_parse_image_header_10(f34);
break;
default:
dev_err(&f34->fn->dev, "Unsupported image file format %02X\n",
header->major_header_version);
return -EINVAL;
}
if (!f34->v7.img.contains_flash_config) {
dev_err(&f34->fn->dev, "%s: No flash config in fw image\n",
__func__);
return -EINVAL;
}
rmi_f34v7_parse_partition_table(f34, f34->v7.img.fl_config.data,
&f34->v7.img.blkcount, &f34->v7.img.phyaddr);
return 0;
}
int rmi_f34v7_do_reflash(struct f34_data *f34, const struct firmware *fw)
{
int ret;
f34->fn->rmi_dev->driver->set_irq_bits(f34->fn->rmi_dev,
f34->fn->irq_mask);
rmi_f34v7_read_queries_bl_version(f34);
f34->v7.image = fw->data;
f34->update_progress = 0;
f34->update_size = 0;
ret = rmi_f34v7_parse_image_info(f34);
if (ret < 0)
return ret;
ret = rmi_f34v7_check_bl_config_size(f34);
if (ret < 0)
return ret;
ret = rmi_f34v7_erase_all(f34);
if (ret < 0)
return ret;
ret = rmi_f34v7_write_partition_table(f34);
if (ret < 0)
return ret;
dev_info(&f34->fn->dev, "%s: Partition table programmed\n", __func__);
/*
* Reset to reload partition table - as the previous firmware has been
* erased, we remain in bootloader mode.
*/
ret = rmi_scan_pdt(f34->fn->rmi_dev, NULL, rmi_initial_reset);
if (ret < 0)
dev_warn(&f34->fn->dev, "RMI reset failed!\n");
dev_info(&f34->fn->dev, "Writing firmware (%d bytes)...\n",
f34->v7.img.ui_firmware.size);
ret = rmi_f34v7_write_firmware(f34);
if (ret < 0)
return ret;
dev_info(&f34->fn->dev, "Writing config (%d bytes)...\n",
f34->v7.img.ui_config.size);
f34->v7.config_area = v7_UI_CONFIG_AREA;
ret = rmi_f34v7_write_ui_config(f34);
if (ret < 0)
return ret;
if (f34->v7.has_display_cfg && f34->v7.img.contains_display_cfg) {
dev_info(&f34->fn->dev, "Writing display config...\n");
ret = rmi_f34v7_write_dp_config(f34);
if (ret < 0)
return ret;
}
if (f34->v7.has_guest_code && f34->v7.img.contains_guest_code) {
dev_info(&f34->fn->dev, "Writing guest code...\n");
ret = rmi_f34v7_write_guest_code(f34);
if (ret < 0)
return ret;
}
return 0;
}
static int rmi_f34v7_enter_flash_prog(struct f34_data *f34)
{
int ret;
f34->fn->rmi_dev->driver->set_irq_bits(f34->fn->rmi_dev, f34->fn->irq_mask);
ret = rmi_f34v7_read_flash_status(f34);
if (ret < 0)
return ret;
if (f34->v7.in_bl_mode) {
dev_info(&f34->fn->dev, "%s: Device in bootloader mode\n",
__func__);
return 0;
}
init_completion(&f34->v7.cmd_done);
ret = rmi_f34v7_write_command(f34, v7_CMD_ENABLE_FLASH_PROG);
if (ret < 0)
return ret;
ret = rmi_f34v7_check_command_status(f34, F34_ENABLE_WAIT_MS);
if (ret < 0)
return ret;
return 0;
}
int rmi_f34v7_start_reflash(struct f34_data *f34, const struct firmware *fw)
{
int ret = 0;
f34->v7.config_area = v7_UI_CONFIG_AREA;
f34->v7.image = fw->data;
ret = rmi_f34v7_parse_image_info(f34);
if (ret < 0)
return ret;
dev_info(&f34->fn->dev, "Firmware image OK\n");
return rmi_f34v7_enter_flash_prog(f34);
}
int rmi_f34v7_probe(struct f34_data *f34)
{
int ret;
/* Read bootloader version */
ret = rmi_read_block(f34->fn->rmi_dev,
f34->fn->fd.query_base_addr + V7_BOOTLOADER_ID_OFFSET,
f34->bootloader_id,
sizeof(f34->bootloader_id));
if (ret < 0) {
dev_err(&f34->fn->dev, "%s: Failed to read bootloader ID\n",
__func__);
return ret;
}
if (f34->bootloader_id[1] == '5') {
f34->bl_version = 5;
} else if (f34->bootloader_id[1] == '6') {
f34->bl_version = 6;
} else if (f34->bootloader_id[1] == 7) {
f34->bl_version = 7;
} else if (f34->bootloader_id[1] == 8) {
f34->bl_version = 8;
} else {
dev_err(&f34->fn->dev,
"%s: Unrecognized bootloader version: %d (%c) %d (%c)\n",
__func__,
f34->bootloader_id[0], f34->bootloader_id[0],
f34->bootloader_id[1], f34->bootloader_id[1]);
return -EINVAL;
}
memset(&f34->v7.blkcount, 0x00, sizeof(f34->v7.blkcount));
memset(&f34->v7.phyaddr, 0x00, sizeof(f34->v7.phyaddr));
init_completion(&f34->v7.cmd_done);
ret = rmi_f34v7_read_queries(f34);
if (ret < 0)
return ret;
return 0;
}
|
linux-master
|
drivers/input/rmi4/rmi_f34v7.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2011-2016 Synaptics Incorporated
* Copyright (c) 2011 Unixphere
*
* This driver provides the core support for a single RMI4-based device.
*
* The RMI4 specification can be found here (URL split for line length):
*
* http://www.synaptics.com/sites/default/files/
* 511-000136-01-Rev-E-RMI4-Interfacing-Guide.pdf
*/
#include <linux/bitmap.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/irq.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/irqdomain.h>
#include <uapi/linux/input.h>
#include <linux/rmi.h>
#include "rmi_bus.h"
#include "rmi_driver.h"
#define HAS_NONSTANDARD_PDT_MASK 0x40
#define RMI4_MAX_PAGE 0xff
#define RMI4_PAGE_SIZE 0x100
#define RMI4_PAGE_MASK 0xFF00
#define RMI_DEVICE_RESET_CMD 0x01
#define DEFAULT_RESET_DELAY_MS 100
void rmi_free_function_list(struct rmi_device *rmi_dev)
{
struct rmi_function *fn, *tmp;
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev, "Freeing function list\n");
/* Doing it in the reverse order so F01 will be removed last */
list_for_each_entry_safe_reverse(fn, tmp,
&data->function_list, node) {
list_del(&fn->node);
rmi_unregister_function(fn);
}
devm_kfree(&rmi_dev->dev, data->irq_memory);
data->irq_memory = NULL;
data->irq_status = NULL;
data->fn_irq_bits = NULL;
data->current_irq_mask = NULL;
data->new_irq_mask = NULL;
data->f01_container = NULL;
data->f34_container = NULL;
}
static int reset_one_function(struct rmi_function *fn)
{
struct rmi_function_handler *fh;
int retval = 0;
if (!fn || !fn->dev.driver)
return 0;
fh = to_rmi_function_handler(fn->dev.driver);
if (fh->reset) {
retval = fh->reset(fn);
if (retval < 0)
dev_err(&fn->dev, "Reset failed with code %d.\n",
retval);
}
return retval;
}
static int configure_one_function(struct rmi_function *fn)
{
struct rmi_function_handler *fh;
int retval = 0;
if (!fn || !fn->dev.driver)
return 0;
fh = to_rmi_function_handler(fn->dev.driver);
if (fh->config) {
retval = fh->config(fn);
if (retval < 0)
dev_err(&fn->dev, "Config failed with code %d.\n",
retval);
}
return retval;
}
static int rmi_driver_process_reset_requests(struct rmi_device *rmi_dev)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct rmi_function *entry;
int retval;
list_for_each_entry(entry, &data->function_list, node) {
retval = reset_one_function(entry);
if (retval < 0)
return retval;
}
return 0;
}
static int rmi_driver_process_config_requests(struct rmi_device *rmi_dev)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct rmi_function *entry;
int retval;
list_for_each_entry(entry, &data->function_list, node) {
retval = configure_one_function(entry);
if (retval < 0)
return retval;
}
return 0;
}
static int rmi_process_interrupt_requests(struct rmi_device *rmi_dev)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct device *dev = &rmi_dev->dev;
int i;
int error;
if (!data)
return 0;
if (!data->attn_data.data) {
error = rmi_read_block(rmi_dev,
data->f01_container->fd.data_base_addr + 1,
data->irq_status, data->num_of_irq_regs);
if (error < 0) {
dev_err(dev, "Failed to read irqs, code=%d\n", error);
return error;
}
}
mutex_lock(&data->irq_mutex);
bitmap_and(data->irq_status, data->irq_status, data->fn_irq_bits,
data->irq_count);
/*
* At this point, irq_status has all bits that are set in the
* interrupt status register and are enabled.
*/
mutex_unlock(&data->irq_mutex);
for_each_set_bit(i, data->irq_status, data->irq_count)
handle_nested_irq(irq_find_mapping(data->irqdomain, i));
if (data->input)
input_sync(data->input);
return 0;
}
void rmi_set_attn_data(struct rmi_device *rmi_dev, unsigned long irq_status,
void *data, size_t size)
{
struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev);
struct rmi4_attn_data attn_data;
void *fifo_data;
if (!drvdata->enabled)
return;
fifo_data = kmemdup(data, size, GFP_ATOMIC);
if (!fifo_data)
return;
attn_data.irq_status = irq_status;
attn_data.size = size;
attn_data.data = fifo_data;
kfifo_put(&drvdata->attn_fifo, attn_data);
}
EXPORT_SYMBOL_GPL(rmi_set_attn_data);
static irqreturn_t rmi_irq_fn(int irq, void *dev_id)
{
struct rmi_device *rmi_dev = dev_id;
struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev);
struct rmi4_attn_data attn_data = {0};
int ret, count;
count = kfifo_get(&drvdata->attn_fifo, &attn_data);
if (count) {
*(drvdata->irq_status) = attn_data.irq_status;
drvdata->attn_data = attn_data;
}
ret = rmi_process_interrupt_requests(rmi_dev);
if (ret)
rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev,
"Failed to process interrupt request: %d\n", ret);
if (count) {
kfree(attn_data.data);
drvdata->attn_data.data = NULL;
}
if (!kfifo_is_empty(&drvdata->attn_fifo))
return rmi_irq_fn(irq, dev_id);
return IRQ_HANDLED;
}
static int rmi_irq_init(struct rmi_device *rmi_dev)
{
struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
int irq_flags = irq_get_trigger_type(pdata->irq);
int ret;
if (!irq_flags)
irq_flags = IRQF_TRIGGER_LOW;
ret = devm_request_threaded_irq(&rmi_dev->dev, pdata->irq, NULL,
rmi_irq_fn, irq_flags | IRQF_ONESHOT,
dev_driver_string(rmi_dev->xport->dev),
rmi_dev);
if (ret < 0) {
dev_err(&rmi_dev->dev, "Failed to register interrupt %d\n",
pdata->irq);
return ret;
}
data->enabled = true;
return 0;
}
struct rmi_function *rmi_find_function(struct rmi_device *rmi_dev, u8 number)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct rmi_function *entry;
list_for_each_entry(entry, &data->function_list, node) {
if (entry->fd.function_number == number)
return entry;
}
return NULL;
}
static int suspend_one_function(struct rmi_function *fn)
{
struct rmi_function_handler *fh;
int retval = 0;
if (!fn || !fn->dev.driver)
return 0;
fh = to_rmi_function_handler(fn->dev.driver);
if (fh->suspend) {
retval = fh->suspend(fn);
if (retval < 0)
dev_err(&fn->dev, "Suspend failed with code %d.\n",
retval);
}
return retval;
}
static int rmi_suspend_functions(struct rmi_device *rmi_dev)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct rmi_function *entry;
int retval;
list_for_each_entry(entry, &data->function_list, node) {
retval = suspend_one_function(entry);
if (retval < 0)
return retval;
}
return 0;
}
static int resume_one_function(struct rmi_function *fn)
{
struct rmi_function_handler *fh;
int retval = 0;
if (!fn || !fn->dev.driver)
return 0;
fh = to_rmi_function_handler(fn->dev.driver);
if (fh->resume) {
retval = fh->resume(fn);
if (retval < 0)
dev_err(&fn->dev, "Resume failed with code %d.\n",
retval);
}
return retval;
}
static int rmi_resume_functions(struct rmi_device *rmi_dev)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct rmi_function *entry;
int retval;
list_for_each_entry(entry, &data->function_list, node) {
retval = resume_one_function(entry);
if (retval < 0)
return retval;
}
return 0;
}
int rmi_enable_sensor(struct rmi_device *rmi_dev)
{
int retval = 0;
retval = rmi_driver_process_config_requests(rmi_dev);
if (retval < 0)
return retval;
return rmi_process_interrupt_requests(rmi_dev);
}
/**
* rmi_driver_set_input_params - set input device id and other data.
*
* @rmi_dev: Pointer to an RMI device
* @input: Pointer to input device
*
*/
static int rmi_driver_set_input_params(struct rmi_device *rmi_dev,
struct input_dev *input)
{
input->name = SYNAPTICS_INPUT_DEVICE_NAME;
input->id.vendor = SYNAPTICS_VENDOR_ID;
input->id.bustype = BUS_RMI;
return 0;
}
static void rmi_driver_set_input_name(struct rmi_device *rmi_dev,
struct input_dev *input)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
const char *device_name = rmi_f01_get_product_ID(data->f01_container);
char *name;
name = devm_kasprintf(&rmi_dev->dev, GFP_KERNEL,
"Synaptics %s", device_name);
if (!name)
return;
input->name = name;
}
static int rmi_driver_set_irq_bits(struct rmi_device *rmi_dev,
unsigned long *mask)
{
int error = 0;
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct device *dev = &rmi_dev->dev;
mutex_lock(&data->irq_mutex);
bitmap_or(data->new_irq_mask,
data->current_irq_mask, mask, data->irq_count);
error = rmi_write_block(rmi_dev,
data->f01_container->fd.control_base_addr + 1,
data->new_irq_mask, data->num_of_irq_regs);
if (error < 0) {
dev_err(dev, "%s: Failed to change enabled interrupts!",
__func__);
goto error_unlock;
}
bitmap_copy(data->current_irq_mask, data->new_irq_mask,
data->num_of_irq_regs);
bitmap_or(data->fn_irq_bits, data->fn_irq_bits, mask, data->irq_count);
error_unlock:
mutex_unlock(&data->irq_mutex);
return error;
}
static int rmi_driver_clear_irq_bits(struct rmi_device *rmi_dev,
unsigned long *mask)
{
int error = 0;
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct device *dev = &rmi_dev->dev;
mutex_lock(&data->irq_mutex);
bitmap_andnot(data->fn_irq_bits,
data->fn_irq_bits, mask, data->irq_count);
bitmap_andnot(data->new_irq_mask,
data->current_irq_mask, mask, data->irq_count);
error = rmi_write_block(rmi_dev,
data->f01_container->fd.control_base_addr + 1,
data->new_irq_mask, data->num_of_irq_regs);
if (error < 0) {
dev_err(dev, "%s: Failed to change enabled interrupts!",
__func__);
goto error_unlock;
}
bitmap_copy(data->current_irq_mask, data->new_irq_mask,
data->num_of_irq_regs);
error_unlock:
mutex_unlock(&data->irq_mutex);
return error;
}
static int rmi_driver_reset_handler(struct rmi_device *rmi_dev)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
int error;
/*
* Can get called before the driver is fully ready to deal with
* this situation.
*/
if (!data || !data->f01_container) {
dev_warn(&rmi_dev->dev,
"Not ready to handle reset yet!\n");
return 0;
}
error = rmi_read_block(rmi_dev,
data->f01_container->fd.control_base_addr + 1,
data->current_irq_mask, data->num_of_irq_regs);
if (error < 0) {
dev_err(&rmi_dev->dev, "%s: Failed to read current IRQ mask.\n",
__func__);
return error;
}
error = rmi_driver_process_reset_requests(rmi_dev);
if (error < 0)
return error;
error = rmi_driver_process_config_requests(rmi_dev);
if (error < 0)
return error;
return 0;
}
static int rmi_read_pdt_entry(struct rmi_device *rmi_dev,
struct pdt_entry *entry, u16 pdt_address)
{
u8 buf[RMI_PDT_ENTRY_SIZE];
int error;
error = rmi_read_block(rmi_dev, pdt_address, buf, RMI_PDT_ENTRY_SIZE);
if (error) {
dev_err(&rmi_dev->dev, "Read PDT entry at %#06x failed, code: %d.\n",
pdt_address, error);
return error;
}
entry->page_start = pdt_address & RMI4_PAGE_MASK;
entry->query_base_addr = buf[0];
entry->command_base_addr = buf[1];
entry->control_base_addr = buf[2];
entry->data_base_addr = buf[3];
entry->interrupt_source_count = buf[4] & RMI_PDT_INT_SOURCE_COUNT_MASK;
entry->function_version = (buf[4] & RMI_PDT_FUNCTION_VERSION_MASK) >> 5;
entry->function_number = buf[5];
return 0;
}
static void rmi_driver_copy_pdt_to_fd(const struct pdt_entry *pdt,
struct rmi_function_descriptor *fd)
{
fd->query_base_addr = pdt->query_base_addr + pdt->page_start;
fd->command_base_addr = pdt->command_base_addr + pdt->page_start;
fd->control_base_addr = pdt->control_base_addr + pdt->page_start;
fd->data_base_addr = pdt->data_base_addr + pdt->page_start;
fd->function_number = pdt->function_number;
fd->interrupt_source_count = pdt->interrupt_source_count;
fd->function_version = pdt->function_version;
}
#define RMI_SCAN_CONTINUE 0
#define RMI_SCAN_DONE 1
static int rmi_scan_pdt_page(struct rmi_device *rmi_dev,
int page,
int *empty_pages,
void *ctx,
int (*callback)(struct rmi_device *rmi_dev,
void *ctx,
const struct pdt_entry *entry))
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct pdt_entry pdt_entry;
u16 page_start = RMI4_PAGE_SIZE * page;
u16 pdt_start = page_start + PDT_START_SCAN_LOCATION;
u16 pdt_end = page_start + PDT_END_SCAN_LOCATION;
u16 addr;
int error;
int retval;
for (addr = pdt_start; addr >= pdt_end; addr -= RMI_PDT_ENTRY_SIZE) {
error = rmi_read_pdt_entry(rmi_dev, &pdt_entry, addr);
if (error)
return error;
if (RMI4_END_OF_PDT(pdt_entry.function_number))
break;
retval = callback(rmi_dev, ctx, &pdt_entry);
if (retval != RMI_SCAN_CONTINUE)
return retval;
}
/*
* Count number of empty PDT pages. If a gap of two pages
* or more is found, stop scanning.
*/
if (addr == pdt_start)
++*empty_pages;
else
*empty_pages = 0;
return (data->bootloader_mode || *empty_pages >= 2) ?
RMI_SCAN_DONE : RMI_SCAN_CONTINUE;
}
int rmi_scan_pdt(struct rmi_device *rmi_dev, void *ctx,
int (*callback)(struct rmi_device *rmi_dev,
void *ctx, const struct pdt_entry *entry))
{
int page;
int empty_pages = 0;
int retval = RMI_SCAN_DONE;
for (page = 0; page <= RMI4_MAX_PAGE; page++) {
retval = rmi_scan_pdt_page(rmi_dev, page, &empty_pages,
ctx, callback);
if (retval != RMI_SCAN_CONTINUE)
break;
}
return retval < 0 ? retval : 0;
}
int rmi_read_register_desc(struct rmi_device *d, u16 addr,
struct rmi_register_descriptor *rdesc)
{
int ret;
u8 size_presence_reg;
u8 buf[35];
int presense_offset = 1;
u8 *struct_buf;
int reg;
int offset = 0;
int map_offset = 0;
int i;
int b;
/*
* The first register of the register descriptor is the size of
* the register descriptor's presense register.
*/
ret = rmi_read(d, addr, &size_presence_reg);
if (ret)
return ret;
++addr;
if (size_presence_reg < 0 || size_presence_reg > 35)
return -EIO;
memset(buf, 0, sizeof(buf));
/*
* The presence register contains the size of the register structure
* and a bitmap which identified which packet registers are present
* for this particular register type (ie query, control, or data).
*/
ret = rmi_read_block(d, addr, buf, size_presence_reg);
if (ret)
return ret;
++addr;
if (buf[0] == 0) {
presense_offset = 3;
rdesc->struct_size = buf[1] | (buf[2] << 8);
} else {
rdesc->struct_size = buf[0];
}
for (i = presense_offset; i < size_presence_reg; i++) {
for (b = 0; b < 8; b++) {
if (buf[i] & (0x1 << b))
bitmap_set(rdesc->presense_map, map_offset, 1);
++map_offset;
}
}
rdesc->num_registers = bitmap_weight(rdesc->presense_map,
RMI_REG_DESC_PRESENSE_BITS);
rdesc->registers = devm_kcalloc(&d->dev,
rdesc->num_registers,
sizeof(struct rmi_register_desc_item),
GFP_KERNEL);
if (!rdesc->registers)
return -ENOMEM;
/*
* Allocate a temporary buffer to hold the register structure.
* I'm not using devm_kzalloc here since it will not be retained
* after exiting this function
*/
struct_buf = kzalloc(rdesc->struct_size, GFP_KERNEL);
if (!struct_buf)
return -ENOMEM;
/*
* The register structure contains information about every packet
* register of this type. This includes the size of the packet
* register and a bitmap of all subpackets contained in the packet
* register.
*/
ret = rmi_read_block(d, addr, struct_buf, rdesc->struct_size);
if (ret)
goto free_struct_buff;
reg = find_first_bit(rdesc->presense_map, RMI_REG_DESC_PRESENSE_BITS);
for (i = 0; i < rdesc->num_registers; i++) {
struct rmi_register_desc_item *item = &rdesc->registers[i];
int reg_size = struct_buf[offset];
++offset;
if (reg_size == 0) {
reg_size = struct_buf[offset] |
(struct_buf[offset + 1] << 8);
offset += 2;
}
if (reg_size == 0) {
reg_size = struct_buf[offset] |
(struct_buf[offset + 1] << 8) |
(struct_buf[offset + 2] << 16) |
(struct_buf[offset + 3] << 24);
offset += 4;
}
item->reg = reg;
item->reg_size = reg_size;
map_offset = 0;
do {
for (b = 0; b < 7; b++) {
if (struct_buf[offset] & (0x1 << b))
bitmap_set(item->subpacket_map,
map_offset, 1);
++map_offset;
}
} while (struct_buf[offset++] & 0x80);
item->num_subpackets = bitmap_weight(item->subpacket_map,
RMI_REG_DESC_SUBPACKET_BITS);
rmi_dbg(RMI_DEBUG_CORE, &d->dev,
"%s: reg: %d reg size: %ld subpackets: %d\n", __func__,
item->reg, item->reg_size, item->num_subpackets);
reg = find_next_bit(rdesc->presense_map,
RMI_REG_DESC_PRESENSE_BITS, reg + 1);
}
free_struct_buff:
kfree(struct_buf);
return ret;
}
const struct rmi_register_desc_item *rmi_get_register_desc_item(
struct rmi_register_descriptor *rdesc, u16 reg)
{
const struct rmi_register_desc_item *item;
int i;
for (i = 0; i < rdesc->num_registers; i++) {
item = &rdesc->registers[i];
if (item->reg == reg)
return item;
}
return NULL;
}
size_t rmi_register_desc_calc_size(struct rmi_register_descriptor *rdesc)
{
const struct rmi_register_desc_item *item;
int i;
size_t size = 0;
for (i = 0; i < rdesc->num_registers; i++) {
item = &rdesc->registers[i];
size += item->reg_size;
}
return size;
}
/* Compute the register offset relative to the base address */
int rmi_register_desc_calc_reg_offset(
struct rmi_register_descriptor *rdesc, u16 reg)
{
const struct rmi_register_desc_item *item;
int offset = 0;
int i;
for (i = 0; i < rdesc->num_registers; i++) {
item = &rdesc->registers[i];
if (item->reg == reg)
return offset;
++offset;
}
return -1;
}
bool rmi_register_desc_has_subpacket(const struct rmi_register_desc_item *item,
u8 subpacket)
{
return find_next_bit(item->subpacket_map, RMI_REG_DESC_PRESENSE_BITS,
subpacket) == subpacket;
}
static int rmi_check_bootloader_mode(struct rmi_device *rmi_dev,
const struct pdt_entry *pdt)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
int ret;
u8 status;
if (pdt->function_number == 0x34 && pdt->function_version > 1) {
ret = rmi_read(rmi_dev, pdt->data_base_addr, &status);
if (ret) {
dev_err(&rmi_dev->dev,
"Failed to read F34 status: %d.\n", ret);
return ret;
}
if (status & BIT(7))
data->bootloader_mode = true;
} else if (pdt->function_number == 0x01) {
ret = rmi_read(rmi_dev, pdt->data_base_addr, &status);
if (ret) {
dev_err(&rmi_dev->dev,
"Failed to read F01 status: %d.\n", ret);
return ret;
}
if (status & BIT(6))
data->bootloader_mode = true;
}
return 0;
}
static int rmi_count_irqs(struct rmi_device *rmi_dev,
void *ctx, const struct pdt_entry *pdt)
{
int *irq_count = ctx;
int ret;
*irq_count += pdt->interrupt_source_count;
ret = rmi_check_bootloader_mode(rmi_dev, pdt);
if (ret < 0)
return ret;
return RMI_SCAN_CONTINUE;
}
int rmi_initial_reset(struct rmi_device *rmi_dev, void *ctx,
const struct pdt_entry *pdt)
{
int error;
if (pdt->function_number == 0x01) {
u16 cmd_addr = pdt->page_start + pdt->command_base_addr;
u8 cmd_buf = RMI_DEVICE_RESET_CMD;
const struct rmi_device_platform_data *pdata =
rmi_get_platform_data(rmi_dev);
if (rmi_dev->xport->ops->reset) {
error = rmi_dev->xport->ops->reset(rmi_dev->xport,
cmd_addr);
if (error)
return error;
return RMI_SCAN_DONE;
}
rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev, "Sending reset\n");
error = rmi_write_block(rmi_dev, cmd_addr, &cmd_buf, 1);
if (error) {
dev_err(&rmi_dev->dev,
"Initial reset failed. Code = %d.\n", error);
return error;
}
mdelay(pdata->reset_delay_ms ?: DEFAULT_RESET_DELAY_MS);
return RMI_SCAN_DONE;
}
/* F01 should always be on page 0. If we don't find it there, fail. */
return pdt->page_start == 0 ? RMI_SCAN_CONTINUE : -ENODEV;
}
static int rmi_create_function(struct rmi_device *rmi_dev,
void *ctx, const struct pdt_entry *pdt)
{
struct device *dev = &rmi_dev->dev;
struct rmi_driver_data *data = dev_get_drvdata(dev);
int *current_irq_count = ctx;
struct rmi_function *fn;
int i;
int error;
rmi_dbg(RMI_DEBUG_CORE, dev, "Initializing F%02X.\n",
pdt->function_number);
fn = kzalloc(sizeof(struct rmi_function) +
BITS_TO_LONGS(data->irq_count) * sizeof(unsigned long),
GFP_KERNEL);
if (!fn) {
dev_err(dev, "Failed to allocate memory for F%02X\n",
pdt->function_number);
return -ENOMEM;
}
INIT_LIST_HEAD(&fn->node);
rmi_driver_copy_pdt_to_fd(pdt, &fn->fd);
fn->rmi_dev = rmi_dev;
fn->num_of_irqs = pdt->interrupt_source_count;
fn->irq_pos = *current_irq_count;
*current_irq_count += fn->num_of_irqs;
for (i = 0; i < fn->num_of_irqs; i++)
set_bit(fn->irq_pos + i, fn->irq_mask);
error = rmi_register_function(fn);
if (error)
return error;
if (pdt->function_number == 0x01)
data->f01_container = fn;
else if (pdt->function_number == 0x34)
data->f34_container = fn;
list_add_tail(&fn->node, &data->function_list);
return RMI_SCAN_CONTINUE;
}
void rmi_enable_irq(struct rmi_device *rmi_dev, bool clear_wake)
{
struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
int irq = pdata->irq;
int irq_flags;
int retval;
mutex_lock(&data->enabled_mutex);
if (data->enabled)
goto out;
enable_irq(irq);
data->enabled = true;
if (clear_wake && device_may_wakeup(rmi_dev->xport->dev)) {
retval = disable_irq_wake(irq);
if (retval)
dev_warn(&rmi_dev->dev,
"Failed to disable irq for wake: %d\n",
retval);
}
/*
* Call rmi_process_interrupt_requests() after enabling irq,
* otherwise we may lose interrupt on edge-triggered systems.
*/
irq_flags = irq_get_trigger_type(pdata->irq);
if (irq_flags & IRQ_TYPE_EDGE_BOTH)
rmi_process_interrupt_requests(rmi_dev);
out:
mutex_unlock(&data->enabled_mutex);
}
void rmi_disable_irq(struct rmi_device *rmi_dev, bool enable_wake)
{
struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct rmi4_attn_data attn_data = {0};
int irq = pdata->irq;
int retval, count;
mutex_lock(&data->enabled_mutex);
if (!data->enabled)
goto out;
data->enabled = false;
disable_irq(irq);
if (enable_wake && device_may_wakeup(rmi_dev->xport->dev)) {
retval = enable_irq_wake(irq);
if (retval)
dev_warn(&rmi_dev->dev,
"Failed to enable irq for wake: %d\n",
retval);
}
/* make sure the fifo is clean */
while (!kfifo_is_empty(&data->attn_fifo)) {
count = kfifo_get(&data->attn_fifo, &attn_data);
if (count)
kfree(attn_data.data);
}
out:
mutex_unlock(&data->enabled_mutex);
}
int rmi_driver_suspend(struct rmi_device *rmi_dev, bool enable_wake)
{
int retval;
retval = rmi_suspend_functions(rmi_dev);
if (retval)
dev_warn(&rmi_dev->dev, "Failed to suspend functions: %d\n",
retval);
rmi_disable_irq(rmi_dev, enable_wake);
return retval;
}
EXPORT_SYMBOL_GPL(rmi_driver_suspend);
int rmi_driver_resume(struct rmi_device *rmi_dev, bool clear_wake)
{
int retval;
rmi_enable_irq(rmi_dev, clear_wake);
retval = rmi_resume_functions(rmi_dev);
if (retval)
dev_warn(&rmi_dev->dev, "Failed to suspend functions: %d\n",
retval);
return retval;
}
EXPORT_SYMBOL_GPL(rmi_driver_resume);
static int rmi_driver_remove(struct device *dev)
{
struct rmi_device *rmi_dev = to_rmi_device(dev);
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
rmi_disable_irq(rmi_dev, false);
irq_domain_remove(data->irqdomain);
data->irqdomain = NULL;
rmi_f34_remove_sysfs(rmi_dev);
rmi_free_function_list(rmi_dev);
return 0;
}
#ifdef CONFIG_OF
static int rmi_driver_of_probe(struct device *dev,
struct rmi_device_platform_data *pdata)
{
int retval;
retval = rmi_of_property_read_u32(dev, &pdata->reset_delay_ms,
"syna,reset-delay-ms", 1);
if (retval)
return retval;
return 0;
}
#else
static inline int rmi_driver_of_probe(struct device *dev,
struct rmi_device_platform_data *pdata)
{
return -ENODEV;
}
#endif
int rmi_probe_interrupts(struct rmi_driver_data *data)
{
struct rmi_device *rmi_dev = data->rmi_dev;
struct device *dev = &rmi_dev->dev;
struct fwnode_handle *fwnode = rmi_dev->xport->dev->fwnode;
int irq_count = 0;
size_t size;
int retval;
/*
* We need to count the IRQs and allocate their storage before scanning
* the PDT and creating the function entries, because adding a new
* function can trigger events that result in the IRQ related storage
* being accessed.
*/
rmi_dbg(RMI_DEBUG_CORE, dev, "%s: Counting IRQs.\n", __func__);
data->bootloader_mode = false;
retval = rmi_scan_pdt(rmi_dev, &irq_count, rmi_count_irqs);
if (retval < 0) {
dev_err(dev, "IRQ counting failed with code %d.\n", retval);
return retval;
}
if (data->bootloader_mode)
dev_warn(dev, "Device in bootloader mode.\n");
/* Allocate and register a linear revmap irq_domain */
data->irqdomain = irq_domain_create_linear(fwnode, irq_count,
&irq_domain_simple_ops,
data);
if (!data->irqdomain) {
dev_err(&rmi_dev->dev, "Failed to create IRQ domain\n");
return -ENOMEM;
}
data->irq_count = irq_count;
data->num_of_irq_regs = (data->irq_count + 7) / 8;
size = BITS_TO_LONGS(data->irq_count) * sizeof(unsigned long);
data->irq_memory = devm_kcalloc(dev, size, 4, GFP_KERNEL);
if (!data->irq_memory) {
dev_err(dev, "Failed to allocate memory for irq masks.\n");
return -ENOMEM;
}
data->irq_status = data->irq_memory + size * 0;
data->fn_irq_bits = data->irq_memory + size * 1;
data->current_irq_mask = data->irq_memory + size * 2;
data->new_irq_mask = data->irq_memory + size * 3;
return retval;
}
int rmi_init_functions(struct rmi_driver_data *data)
{
struct rmi_device *rmi_dev = data->rmi_dev;
struct device *dev = &rmi_dev->dev;
int irq_count = 0;
int retval;
rmi_dbg(RMI_DEBUG_CORE, dev, "%s: Creating functions.\n", __func__);
retval = rmi_scan_pdt(rmi_dev, &irq_count, rmi_create_function);
if (retval < 0) {
dev_err(dev, "Function creation failed with code %d.\n",
retval);
goto err_destroy_functions;
}
if (!data->f01_container) {
dev_err(dev, "Missing F01 container!\n");
retval = -EINVAL;
goto err_destroy_functions;
}
retval = rmi_read_block(rmi_dev,
data->f01_container->fd.control_base_addr + 1,
data->current_irq_mask, data->num_of_irq_regs);
if (retval < 0) {
dev_err(dev, "%s: Failed to read current IRQ mask.\n",
__func__);
goto err_destroy_functions;
}
return 0;
err_destroy_functions:
rmi_free_function_list(rmi_dev);
return retval;
}
static int rmi_driver_probe(struct device *dev)
{
struct rmi_driver *rmi_driver;
struct rmi_driver_data *data;
struct rmi_device_platform_data *pdata;
struct rmi_device *rmi_dev;
int retval;
rmi_dbg(RMI_DEBUG_CORE, dev, "%s: Starting probe.\n",
__func__);
if (!rmi_is_physical_device(dev)) {
rmi_dbg(RMI_DEBUG_CORE, dev, "Not a physical device.\n");
return -ENODEV;
}
rmi_dev = to_rmi_device(dev);
rmi_driver = to_rmi_driver(dev->driver);
rmi_dev->driver = rmi_driver;
pdata = rmi_get_platform_data(rmi_dev);
if (rmi_dev->xport->dev->of_node) {
retval = rmi_driver_of_probe(rmi_dev->xport->dev, pdata);
if (retval)
return retval;
}
data = devm_kzalloc(dev, sizeof(struct rmi_driver_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
INIT_LIST_HEAD(&data->function_list);
data->rmi_dev = rmi_dev;
dev_set_drvdata(&rmi_dev->dev, data);
/*
* Right before a warm boot, the sensor might be in some unusual state,
* such as F54 diagnostics, or F34 bootloader mode after a firmware
* or configuration update. In order to clear the sensor to a known
* state and/or apply any updates, we issue a initial reset to clear any
* previous settings and force it into normal operation.
*
* We have to do this before actually building the PDT because
* the reflash updates (if any) might cause various registers to move
* around.
*
* For a number of reasons, this initial reset may fail to return
* within the specified time, but we'll still be able to bring up the
* driver normally after that failure. This occurs most commonly in
* a cold boot situation (where then firmware takes longer to come up
* than from a warm boot) and the reset_delay_ms in the platform data
* has been set too short to accommodate that. Since the sensor will
* eventually come up and be usable, we don't want to just fail here
* and leave the customer's device unusable. So we warn them, and
* continue processing.
*/
retval = rmi_scan_pdt(rmi_dev, NULL, rmi_initial_reset);
if (retval < 0)
dev_warn(dev, "RMI initial reset failed! Continuing in spite of this.\n");
retval = rmi_read(rmi_dev, PDT_PROPERTIES_LOCATION, &data->pdt_props);
if (retval < 0) {
/*
* we'll print out a warning and continue since
* failure to get the PDT properties is not a cause to fail
*/
dev_warn(dev, "Could not read PDT properties from %#06x (code %d). Assuming 0x00.\n",
PDT_PROPERTIES_LOCATION, retval);
}
mutex_init(&data->irq_mutex);
mutex_init(&data->enabled_mutex);
retval = rmi_probe_interrupts(data);
if (retval)
goto err;
if (rmi_dev->xport->input) {
/*
* The transport driver already has an input device.
* In some cases it is preferable to reuse the transport
* devices input device instead of creating a new one here.
* One example is some HID touchpads report "pass-through"
* button events are not reported by rmi registers.
*/
data->input = rmi_dev->xport->input;
} else {
data->input = devm_input_allocate_device(dev);
if (!data->input) {
dev_err(dev, "%s: Failed to allocate input device.\n",
__func__);
retval = -ENOMEM;
goto err;
}
rmi_driver_set_input_params(rmi_dev, data->input);
data->input->phys = devm_kasprintf(dev, GFP_KERNEL,
"%s/input0", dev_name(dev));
}
retval = rmi_init_functions(data);
if (retval)
goto err;
retval = rmi_f34_create_sysfs(rmi_dev);
if (retval)
goto err;
if (data->input) {
rmi_driver_set_input_name(rmi_dev, data->input);
if (!rmi_dev->xport->input) {
retval = input_register_device(data->input);
if (retval) {
dev_err(dev, "%s: Failed to register input device.\n",
__func__);
goto err_destroy_functions;
}
}
}
retval = rmi_irq_init(rmi_dev);
if (retval < 0)
goto err_destroy_functions;
if (data->f01_container->dev.driver) {
/* Driver already bound, so enable ATTN now. */
retval = rmi_enable_sensor(rmi_dev);
if (retval)
goto err_disable_irq;
}
return 0;
err_disable_irq:
rmi_disable_irq(rmi_dev, false);
err_destroy_functions:
rmi_free_function_list(rmi_dev);
err:
return retval;
}
static struct rmi_driver rmi_physical_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "rmi4_physical",
.bus = &rmi_bus_type,
.probe = rmi_driver_probe,
.remove = rmi_driver_remove,
},
.reset_handler = rmi_driver_reset_handler,
.clear_irq_bits = rmi_driver_clear_irq_bits,
.set_irq_bits = rmi_driver_set_irq_bits,
.set_input_params = rmi_driver_set_input_params,
};
bool rmi_is_physical_driver(struct device_driver *drv)
{
return drv == &rmi_physical_driver.driver;
}
int __init rmi_register_physical_driver(void)
{
int error;
error = driver_register(&rmi_physical_driver.driver);
if (error) {
pr_err("%s: driver register failed, code=%d.\n", __func__,
error);
return error;
}
return 0;
}
void __exit rmi_unregister_physical_driver(void)
{
driver_unregister(&rmi_physical_driver.driver);
}
|
linux-master
|
drivers/input/rmi4/rmi_driver.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2011-2016 Synaptics Incorporated
* Copyright (c) 2011 Unixphere
*/
#include <linux/kernel.h>
#include <linux/rmi.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/of.h>
#include <asm/unaligned.h>
#include "rmi_driver.h"
#define RMI_PRODUCT_ID_LENGTH 10
#define RMI_PRODUCT_INFO_LENGTH 2
#define RMI_DATE_CODE_LENGTH 3
#define PRODUCT_ID_OFFSET 0x10
#define PRODUCT_INFO_OFFSET 0x1E
/* Force a firmware reset of the sensor */
#define RMI_F01_CMD_DEVICE_RESET 1
/* Various F01_RMI_QueryX bits */
#define RMI_F01_QRY1_CUSTOM_MAP BIT(0)
#define RMI_F01_QRY1_NON_COMPLIANT BIT(1)
#define RMI_F01_QRY1_HAS_LTS BIT(2)
#define RMI_F01_QRY1_HAS_SENSOR_ID BIT(3)
#define RMI_F01_QRY1_HAS_CHARGER_INP BIT(4)
#define RMI_F01_QRY1_HAS_ADJ_DOZE BIT(5)
#define RMI_F01_QRY1_HAS_ADJ_DOZE_HOFF BIT(6)
#define RMI_F01_QRY1_HAS_QUERY42 BIT(7)
#define RMI_F01_QRY5_YEAR_MASK 0x1f
#define RMI_F01_QRY6_MONTH_MASK 0x0f
#define RMI_F01_QRY7_DAY_MASK 0x1f
#define RMI_F01_QRY2_PRODINFO_MASK 0x7f
#define RMI_F01_BASIC_QUERY_LEN 21 /* From Query 00 through 20 */
struct f01_basic_properties {
u8 manufacturer_id;
bool has_lts;
bool has_adjustable_doze;
bool has_adjustable_doze_holdoff;
char dom[11]; /* YYYY/MM/DD + '\0' */
u8 product_id[RMI_PRODUCT_ID_LENGTH + 1];
u16 productinfo;
u32 firmware_id;
u32 package_id;
};
/* F01 device status bits */
/* Most recent device status event */
#define RMI_F01_STATUS_CODE(status) ((status) & 0x0f)
/* The device has lost its configuration for some reason. */
#define RMI_F01_STATUS_UNCONFIGURED(status) (!!((status) & 0x80))
/* The device is in bootloader mode */
#define RMI_F01_STATUS_BOOTLOADER(status) ((status) & 0x40)
/* Control register bits */
/*
* Sleep mode controls power management on the device and affects all
* functions of the device.
*/
#define RMI_F01_CTRL0_SLEEP_MODE_MASK 0x03
#define RMI_SLEEP_MODE_NORMAL 0x00
#define RMI_SLEEP_MODE_SENSOR_SLEEP 0x01
#define RMI_SLEEP_MODE_RESERVED0 0x02
#define RMI_SLEEP_MODE_RESERVED1 0x03
/*
* This bit disables whatever sleep mode may be selected by the sleep_mode
* field and forces the device to run at full power without sleeping.
*/
#define RMI_F01_CTRL0_NOSLEEP_BIT BIT(2)
/*
* When this bit is set, the touch controller employs a noise-filtering
* algorithm designed for use with a connected battery charger.
*/
#define RMI_F01_CTRL0_CHARGER_BIT BIT(5)
/*
* Sets the report rate for the device. The effect of this setting is
* highly product dependent. Check the spec sheet for your particular
* touch sensor.
*/
#define RMI_F01_CTRL0_REPORTRATE_BIT BIT(6)
/*
* Written by the host as an indicator that the device has been
* successfully configured.
*/
#define RMI_F01_CTRL0_CONFIGURED_BIT BIT(7)
/**
* struct f01_device_control - controls basic sensor functions
*
* @ctrl0: see the bit definitions above.
* @doze_interval: controls the interval between checks for finger presence
* when the touch sensor is in doze mode, in units of 10ms.
* @wakeup_threshold: controls the capacitance threshold at which the touch
* sensor will decide to wake up from that low power state.
* @doze_holdoff: controls how long the touch sensor waits after the last
* finger lifts before entering the doze state, in units of 100ms.
*/
struct f01_device_control {
u8 ctrl0;
u8 doze_interval;
u8 wakeup_threshold;
u8 doze_holdoff;
};
struct f01_data {
struct f01_basic_properties properties;
struct f01_device_control device_control;
u16 doze_interval_addr;
u16 wakeup_threshold_addr;
u16 doze_holdoff_addr;
bool suspended;
bool old_nosleep;
unsigned int num_of_irq_regs;
};
static int rmi_f01_read_properties(struct rmi_device *rmi_dev,
u16 query_base_addr,
struct f01_basic_properties *props)
{
u8 queries[RMI_F01_BASIC_QUERY_LEN];
int ret;
int query_offset = query_base_addr;
bool has_ds4_queries = false;
bool has_query42 = false;
bool has_sensor_id = false;
bool has_package_id_query = false;
bool has_build_id_query = false;
u16 prod_info_addr;
u8 ds4_query_len;
ret = rmi_read_block(rmi_dev, query_offset,
queries, RMI_F01_BASIC_QUERY_LEN);
if (ret) {
dev_err(&rmi_dev->dev,
"Failed to read device query registers: %d\n", ret);
return ret;
}
prod_info_addr = query_offset + 17;
query_offset += RMI_F01_BASIC_QUERY_LEN;
/* Now parse what we got */
props->manufacturer_id = queries[0];
props->has_lts = queries[1] & RMI_F01_QRY1_HAS_LTS;
props->has_adjustable_doze =
queries[1] & RMI_F01_QRY1_HAS_ADJ_DOZE;
props->has_adjustable_doze_holdoff =
queries[1] & RMI_F01_QRY1_HAS_ADJ_DOZE_HOFF;
has_query42 = queries[1] & RMI_F01_QRY1_HAS_QUERY42;
has_sensor_id = queries[1] & RMI_F01_QRY1_HAS_SENSOR_ID;
snprintf(props->dom, sizeof(props->dom), "20%02d/%02d/%02d",
queries[5] & RMI_F01_QRY5_YEAR_MASK,
queries[6] & RMI_F01_QRY6_MONTH_MASK,
queries[7] & RMI_F01_QRY7_DAY_MASK);
memcpy(props->product_id, &queries[11],
RMI_PRODUCT_ID_LENGTH);
props->product_id[RMI_PRODUCT_ID_LENGTH] = '\0';
props->productinfo =
((queries[2] & RMI_F01_QRY2_PRODINFO_MASK) << 7) |
(queries[3] & RMI_F01_QRY2_PRODINFO_MASK);
if (has_sensor_id)
query_offset++;
if (has_query42) {
ret = rmi_read(rmi_dev, query_offset, queries);
if (ret) {
dev_err(&rmi_dev->dev,
"Failed to read query 42 register: %d\n", ret);
return ret;
}
has_ds4_queries = !!(queries[0] & BIT(0));
query_offset++;
}
if (has_ds4_queries) {
ret = rmi_read(rmi_dev, query_offset, &ds4_query_len);
if (ret) {
dev_err(&rmi_dev->dev,
"Failed to read DS4 queries length: %d\n", ret);
return ret;
}
query_offset++;
if (ds4_query_len > 0) {
ret = rmi_read(rmi_dev, query_offset, queries);
if (ret) {
dev_err(&rmi_dev->dev,
"Failed to read DS4 queries: %d\n",
ret);
return ret;
}
has_package_id_query = !!(queries[0] & BIT(0));
has_build_id_query = !!(queries[0] & BIT(1));
}
if (has_package_id_query) {
ret = rmi_read_block(rmi_dev, prod_info_addr,
queries, sizeof(__le64));
if (ret) {
dev_err(&rmi_dev->dev,
"Failed to read package info: %d\n",
ret);
return ret;
}
props->package_id = get_unaligned_le64(queries);
prod_info_addr++;
}
if (has_build_id_query) {
ret = rmi_read_block(rmi_dev, prod_info_addr, queries,
3);
if (ret) {
dev_err(&rmi_dev->dev,
"Failed to read product info: %d\n",
ret);
return ret;
}
props->firmware_id = queries[1] << 8 | queries[0];
props->firmware_id += queries[2] * 65536;
}
}
return 0;
}
const char *rmi_f01_get_product_ID(struct rmi_function *fn)
{
struct f01_data *f01 = dev_get_drvdata(&fn->dev);
return f01->properties.product_id;
}
static ssize_t rmi_driver_manufacturer_id_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
return scnprintf(buf, PAGE_SIZE, "%d\n",
f01->properties.manufacturer_id);
}
static DEVICE_ATTR(manufacturer_id, 0444,
rmi_driver_manufacturer_id_show, NULL);
static ssize_t rmi_driver_dom_show(struct device *dev,
struct device_attribute *dattr, char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
return scnprintf(buf, PAGE_SIZE, "%s\n", f01->properties.dom);
}
static DEVICE_ATTR(date_of_manufacture, 0444, rmi_driver_dom_show, NULL);
static ssize_t rmi_driver_product_id_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
return scnprintf(buf, PAGE_SIZE, "%s\n", f01->properties.product_id);
}
static DEVICE_ATTR(product_id, 0444, rmi_driver_product_id_show, NULL);
static ssize_t rmi_driver_firmware_id_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
return scnprintf(buf, PAGE_SIZE, "%d\n", f01->properties.firmware_id);
}
static DEVICE_ATTR(firmware_id, 0444, rmi_driver_firmware_id_show, NULL);
static ssize_t rmi_driver_package_id_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
u32 package_id = f01->properties.package_id;
return scnprintf(buf, PAGE_SIZE, "%04x.%04x\n",
package_id & 0xffff, (package_id >> 16) & 0xffff);
}
static DEVICE_ATTR(package_id, 0444, rmi_driver_package_id_show, NULL);
static struct attribute *rmi_f01_attrs[] = {
&dev_attr_manufacturer_id.attr,
&dev_attr_date_of_manufacture.attr,
&dev_attr_product_id.attr,
&dev_attr_firmware_id.attr,
&dev_attr_package_id.attr,
NULL
};
static const struct attribute_group rmi_f01_attr_group = {
.attrs = rmi_f01_attrs,
};
#ifdef CONFIG_OF
static int rmi_f01_of_probe(struct device *dev,
struct rmi_device_platform_data *pdata)
{
int retval;
u32 val;
retval = rmi_of_property_read_u32(dev,
(u32 *)&pdata->power_management.nosleep,
"syna,nosleep-mode", 1);
if (retval)
return retval;
retval = rmi_of_property_read_u32(dev, &val,
"syna,wakeup-threshold", 1);
if (retval)
return retval;
pdata->power_management.wakeup_threshold = val;
retval = rmi_of_property_read_u32(dev, &val,
"syna,doze-holdoff-ms", 1);
if (retval)
return retval;
pdata->power_management.doze_holdoff = val * 100;
retval = rmi_of_property_read_u32(dev, &val,
"syna,doze-interval-ms", 1);
if (retval)
return retval;
pdata->power_management.doze_interval = val / 10;
return 0;
}
#else
static inline int rmi_f01_of_probe(struct device *dev,
struct rmi_device_platform_data *pdata)
{
return -ENODEV;
}
#endif
static int rmi_f01_probe(struct rmi_function *fn)
{
struct rmi_device *rmi_dev = fn->rmi_dev;
struct rmi_driver_data *driver_data = dev_get_drvdata(&rmi_dev->dev);
struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);
struct f01_data *f01;
int error;
u16 ctrl_base_addr = fn->fd.control_base_addr;
u8 device_status;
u8 temp;
if (fn->dev.of_node) {
error = rmi_f01_of_probe(&fn->dev, pdata);
if (error)
return error;
}
f01 = devm_kzalloc(&fn->dev, sizeof(struct f01_data), GFP_KERNEL);
if (!f01)
return -ENOMEM;
f01->num_of_irq_regs = driver_data->num_of_irq_regs;
/*
* Set the configured bit and (optionally) other important stuff
* in the device control register.
*/
error = rmi_read(rmi_dev, fn->fd.control_base_addr,
&f01->device_control.ctrl0);
if (error) {
dev_err(&fn->dev, "Failed to read F01 control: %d\n", error);
return error;
}
switch (pdata->power_management.nosleep) {
case RMI_REG_STATE_DEFAULT:
break;
case RMI_REG_STATE_OFF:
f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_NOSLEEP_BIT;
break;
case RMI_REG_STATE_ON:
f01->device_control.ctrl0 |= RMI_F01_CTRL0_NOSLEEP_BIT;
break;
}
/*
* Sleep mode might be set as a hangover from a system crash or
* reboot without power cycle. If so, clear it so the sensor
* is certain to function.
*/
if ((f01->device_control.ctrl0 & RMI_F01_CTRL0_SLEEP_MODE_MASK) !=
RMI_SLEEP_MODE_NORMAL) {
dev_warn(&fn->dev,
"WARNING: Non-zero sleep mode found. Clearing...\n");
f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
}
f01->device_control.ctrl0 |= RMI_F01_CTRL0_CONFIGURED_BIT;
error = rmi_write(rmi_dev, fn->fd.control_base_addr,
f01->device_control.ctrl0);
if (error) {
dev_err(&fn->dev, "Failed to write F01 control: %d\n", error);
return error;
}
/* Dummy read in order to clear irqs */
error = rmi_read(rmi_dev, fn->fd.data_base_addr + 1, &temp);
if (error < 0) {
dev_err(&fn->dev, "Failed to read Interrupt Status.\n");
return error;
}
error = rmi_f01_read_properties(rmi_dev, fn->fd.query_base_addr,
&f01->properties);
if (error < 0) {
dev_err(&fn->dev, "Failed to read F01 properties.\n");
return error;
}
dev_info(&fn->dev, "found RMI device, manufacturer: %s, product: %s, fw id: %d\n",
f01->properties.manufacturer_id == 1 ? "Synaptics" : "unknown",
f01->properties.product_id, f01->properties.firmware_id);
/* Advance to interrupt control registers, then skip over them. */
ctrl_base_addr++;
ctrl_base_addr += f01->num_of_irq_regs;
/* read control register */
if (f01->properties.has_adjustable_doze) {
f01->doze_interval_addr = ctrl_base_addr;
ctrl_base_addr++;
if (pdata->power_management.doze_interval) {
f01->device_control.doze_interval =
pdata->power_management.doze_interval;
error = rmi_write(rmi_dev, f01->doze_interval_addr,
f01->device_control.doze_interval);
if (error) {
dev_err(&fn->dev,
"Failed to configure F01 doze interval register: %d\n",
error);
return error;
}
} else {
error = rmi_read(rmi_dev, f01->doze_interval_addr,
&f01->device_control.doze_interval);
if (error) {
dev_err(&fn->dev,
"Failed to read F01 doze interval register: %d\n",
error);
return error;
}
}
f01->wakeup_threshold_addr = ctrl_base_addr;
ctrl_base_addr++;
if (pdata->power_management.wakeup_threshold) {
f01->device_control.wakeup_threshold =
pdata->power_management.wakeup_threshold;
error = rmi_write(rmi_dev, f01->wakeup_threshold_addr,
f01->device_control.wakeup_threshold);
if (error) {
dev_err(&fn->dev,
"Failed to configure F01 wakeup threshold register: %d\n",
error);
return error;
}
} else {
error = rmi_read(rmi_dev, f01->wakeup_threshold_addr,
&f01->device_control.wakeup_threshold);
if (error < 0) {
dev_err(&fn->dev,
"Failed to read F01 wakeup threshold register: %d\n",
error);
return error;
}
}
}
if (f01->properties.has_lts)
ctrl_base_addr++;
if (f01->properties.has_adjustable_doze_holdoff) {
f01->doze_holdoff_addr = ctrl_base_addr;
ctrl_base_addr++;
if (pdata->power_management.doze_holdoff) {
f01->device_control.doze_holdoff =
pdata->power_management.doze_holdoff;
error = rmi_write(rmi_dev, f01->doze_holdoff_addr,
f01->device_control.doze_holdoff);
if (error) {
dev_err(&fn->dev,
"Failed to configure F01 doze holdoff register: %d\n",
error);
return error;
}
} else {
error = rmi_read(rmi_dev, f01->doze_holdoff_addr,
&f01->device_control.doze_holdoff);
if (error) {
dev_err(&fn->dev,
"Failed to read F01 doze holdoff register: %d\n",
error);
return error;
}
}
}
error = rmi_read(rmi_dev, fn->fd.data_base_addr, &device_status);
if (error < 0) {
dev_err(&fn->dev,
"Failed to read device status: %d\n", error);
return error;
}
if (RMI_F01_STATUS_UNCONFIGURED(device_status)) {
dev_err(&fn->dev,
"Device was reset during configuration process, status: %#02x!\n",
RMI_F01_STATUS_CODE(device_status));
return -EINVAL;
}
dev_set_drvdata(&fn->dev, f01);
error = sysfs_create_group(&fn->rmi_dev->dev.kobj, &rmi_f01_attr_group);
if (error)
dev_warn(&fn->dev, "Failed to create sysfs group: %d\n", error);
return 0;
}
static void rmi_f01_remove(struct rmi_function *fn)
{
/* Note that the bus device is used, not the F01 device */
sysfs_remove_group(&fn->rmi_dev->dev.kobj, &rmi_f01_attr_group);
}
static int rmi_f01_config(struct rmi_function *fn)
{
struct f01_data *f01 = dev_get_drvdata(&fn->dev);
int error;
error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr,
f01->device_control.ctrl0);
if (error) {
dev_err(&fn->dev,
"Failed to write device_control register: %d\n", error);
return error;
}
if (f01->properties.has_adjustable_doze) {
error = rmi_write(fn->rmi_dev, f01->doze_interval_addr,
f01->device_control.doze_interval);
if (error) {
dev_err(&fn->dev,
"Failed to write doze interval: %d\n", error);
return error;
}
error = rmi_write_block(fn->rmi_dev,
f01->wakeup_threshold_addr,
&f01->device_control.wakeup_threshold,
sizeof(u8));
if (error) {
dev_err(&fn->dev,
"Failed to write wakeup threshold: %d\n",
error);
return error;
}
}
if (f01->properties.has_adjustable_doze_holdoff) {
error = rmi_write(fn->rmi_dev, f01->doze_holdoff_addr,
f01->device_control.doze_holdoff);
if (error) {
dev_err(&fn->dev,
"Failed to write doze holdoff: %d\n", error);
return error;
}
}
return 0;
}
static int rmi_f01_suspend(struct rmi_function *fn)
{
struct f01_data *f01 = dev_get_drvdata(&fn->dev);
int error;
f01->old_nosleep =
f01->device_control.ctrl0 & RMI_F01_CTRL0_NOSLEEP_BIT;
f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_NOSLEEP_BIT;
f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
if (device_may_wakeup(fn->rmi_dev->xport->dev))
f01->device_control.ctrl0 |= RMI_SLEEP_MODE_RESERVED1;
else
f01->device_control.ctrl0 |= RMI_SLEEP_MODE_SENSOR_SLEEP;
error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr,
f01->device_control.ctrl0);
if (error) {
dev_err(&fn->dev, "Failed to write sleep mode: %d.\n", error);
if (f01->old_nosleep)
f01->device_control.ctrl0 |= RMI_F01_CTRL0_NOSLEEP_BIT;
f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
f01->device_control.ctrl0 |= RMI_SLEEP_MODE_NORMAL;
return error;
}
return 0;
}
static int rmi_f01_resume(struct rmi_function *fn)
{
struct f01_data *f01 = dev_get_drvdata(&fn->dev);
int error;
if (f01->old_nosleep)
f01->device_control.ctrl0 |= RMI_F01_CTRL0_NOSLEEP_BIT;
f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
f01->device_control.ctrl0 |= RMI_SLEEP_MODE_NORMAL;
error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr,
f01->device_control.ctrl0);
if (error) {
dev_err(&fn->dev,
"Failed to restore normal operation: %d.\n", error);
return error;
}
return 0;
}
static irqreturn_t rmi_f01_attention(int irq, void *ctx)
{
struct rmi_function *fn = ctx;
struct rmi_device *rmi_dev = fn->rmi_dev;
int error;
u8 device_status;
error = rmi_read(rmi_dev, fn->fd.data_base_addr, &device_status);
if (error) {
dev_err(&fn->dev,
"Failed to read device status: %d.\n", error);
return IRQ_RETVAL(error);
}
if (RMI_F01_STATUS_BOOTLOADER(device_status))
dev_warn(&fn->dev,
"Device in bootloader mode, please update firmware\n");
if (RMI_F01_STATUS_UNCONFIGURED(device_status)) {
dev_warn(&fn->dev, "Device reset detected.\n");
error = rmi_dev->driver->reset_handler(rmi_dev);
if (error) {
dev_err(&fn->dev, "Device reset failed: %d\n", error);
return IRQ_RETVAL(error);
}
}
return IRQ_HANDLED;
}
struct rmi_function_handler rmi_f01_handler = {
.driver = {
.name = "rmi4_f01",
/*
* Do not allow user unbinding F01 as it is critical
* function.
*/
.suppress_bind_attrs = true,
},
.func = 0x01,
.probe = rmi_f01_probe,
.remove = rmi_f01_remove,
.config = rmi_f01_config,
.attention = rmi_f01_attention,
.suspend = rmi_f01_suspend,
.resume = rmi_f01_resume,
};
|
linux-master
|
drivers/input/rmi4/rmi_f01.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2012-2015 Synaptics Incorporated
* Copyright (C) 2016 Zodiac Inflight Innovations
*/
#include <linux/kernel.h>
#include <linux/rmi.h>
#include <linux/input.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-vmalloc.h>
#include "rmi_driver.h"
#define F54_NAME "rmi4_f54"
/* F54 data offsets */
#define F54_REPORT_DATA_OFFSET 3
#define F54_FIFO_OFFSET 1
#define F54_NUM_TX_OFFSET 1
#define F54_NUM_RX_OFFSET 0
/*
* The smbus protocol can read only 32 bytes max at a time.
* But this should be fine for i2c/spi as well.
*/
#define F54_REPORT_DATA_SIZE 32
/* F54 commands */
#define F54_GET_REPORT 1
#define F54_FORCE_CAL 2
/* F54 capabilities */
#define F54_CAP_BASELINE (1 << 2)
#define F54_CAP_IMAGE8 (1 << 3)
#define F54_CAP_IMAGE16 (1 << 6)
/**
* enum rmi_f54_report_type - RMI4 F54 report types
*
* @F54_REPORT_NONE: No Image Report.
*
* @F54_8BIT_IMAGE: Normalized 8-Bit Image Report. The capacitance variance
* from baseline for each pixel.
*
* @F54_16BIT_IMAGE: Normalized 16-Bit Image Report. The capacitance variance
* from baseline for each pixel.
*
* @F54_RAW_16BIT_IMAGE:
* Raw 16-Bit Image Report. The raw capacitance for each
* pixel.
*
* @F54_TRUE_BASELINE: True Baseline Report. The baseline capacitance for each
* pixel.
*
* @F54_FULL_RAW_CAP: Full Raw Capacitance Report. The raw capacitance with
* low reference set to its minimum value and high
* reference set to its maximum value.
*
* @F54_FULL_RAW_CAP_RX_OFFSET_REMOVED:
* Full Raw Capacitance with Receiver Offset Removed
* Report. Set Low reference to its minimum value and high
* references to its maximum value, then report the raw
* capacitance for each pixel.
*
* @F54_MAX_REPORT_TYPE:
* Maximum number of Report Types. Used for sanity
* checking.
*/
enum rmi_f54_report_type {
F54_REPORT_NONE = 0,
F54_8BIT_IMAGE = 1,
F54_16BIT_IMAGE = 2,
F54_RAW_16BIT_IMAGE = 3,
F54_TRUE_BASELINE = 9,
F54_FULL_RAW_CAP = 19,
F54_FULL_RAW_CAP_RX_OFFSET_REMOVED = 20,
F54_MAX_REPORT_TYPE,
};
static const char * const rmi_f54_report_type_names[] = {
[F54_REPORT_NONE] = "Unknown",
[F54_8BIT_IMAGE] = "Normalized 8-Bit Image",
[F54_16BIT_IMAGE] = "Normalized 16-Bit Image",
[F54_RAW_16BIT_IMAGE] = "Raw 16-Bit Image",
[F54_TRUE_BASELINE] = "True Baseline",
[F54_FULL_RAW_CAP] = "Full Raw Capacitance",
[F54_FULL_RAW_CAP_RX_OFFSET_REMOVED]
= "Full Raw Capacitance RX Offset Removed",
};
struct f54_data {
struct rmi_function *fn;
u8 num_rx_electrodes;
u8 num_tx_electrodes;
u8 capabilities;
u16 clock_rate;
u8 family;
enum rmi_f54_report_type report_type;
u8 *report_data;
int report_size;
bool is_busy;
struct mutex status_mutex;
struct mutex data_mutex;
struct workqueue_struct *workqueue;
struct delayed_work work;
unsigned long timeout;
struct completion cmd_done;
/* V4L2 support */
struct v4l2_device v4l2;
struct v4l2_pix_format format;
struct video_device vdev;
struct vb2_queue queue;
struct mutex lock;
u32 sequence;
int input;
enum rmi_f54_report_type inputs[F54_MAX_REPORT_TYPE];
};
/*
* Basic checks on report_type to ensure we write a valid type
* to the sensor.
*/
static bool is_f54_report_type_valid(struct f54_data *f54,
enum rmi_f54_report_type reptype)
{
switch (reptype) {
case F54_8BIT_IMAGE:
return f54->capabilities & F54_CAP_IMAGE8;
case F54_16BIT_IMAGE:
case F54_RAW_16BIT_IMAGE:
return f54->capabilities & F54_CAP_IMAGE16;
case F54_TRUE_BASELINE:
return f54->capabilities & F54_CAP_IMAGE16;
case F54_FULL_RAW_CAP:
case F54_FULL_RAW_CAP_RX_OFFSET_REMOVED:
return true;
default:
return false;
}
}
static enum rmi_f54_report_type rmi_f54_get_reptype(struct f54_data *f54,
unsigned int i)
{
if (i >= F54_MAX_REPORT_TYPE)
return F54_REPORT_NONE;
return f54->inputs[i];
}
static void rmi_f54_create_input_map(struct f54_data *f54)
{
int i = 0;
enum rmi_f54_report_type reptype;
for (reptype = 1; reptype < F54_MAX_REPORT_TYPE; reptype++) {
if (!is_f54_report_type_valid(f54, reptype))
continue;
f54->inputs[i++] = reptype;
}
/* Remaining values are zero via kzalloc */
}
static int rmi_f54_request_report(struct rmi_function *fn, u8 report_type)
{
struct f54_data *f54 = dev_get_drvdata(&fn->dev);
struct rmi_device *rmi_dev = fn->rmi_dev;
int error;
/* Write Report Type into F54_AD_Data0 */
if (f54->report_type != report_type) {
error = rmi_write(rmi_dev, f54->fn->fd.data_base_addr,
report_type);
if (error)
return error;
f54->report_type = report_type;
}
/*
* Small delay after disabling interrupts to avoid race condition
* in firmare. This value is a bit higher than absolutely necessary.
* Should be removed once issue is resolved in firmware.
*/
usleep_range(2000, 3000);
mutex_lock(&f54->data_mutex);
error = rmi_write(rmi_dev, fn->fd.command_base_addr, F54_GET_REPORT);
if (error < 0)
goto unlock;
init_completion(&f54->cmd_done);
f54->is_busy = 1;
f54->timeout = jiffies + msecs_to_jiffies(100);
queue_delayed_work(f54->workqueue, &f54->work, 0);
unlock:
mutex_unlock(&f54->data_mutex);
return error;
}
static size_t rmi_f54_get_report_size(struct f54_data *f54)
{
struct rmi_device *rmi_dev = f54->fn->rmi_dev;
struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
u8 rx = drv_data->num_rx_electrodes ? : f54->num_rx_electrodes;
u8 tx = drv_data->num_tx_electrodes ? : f54->num_tx_electrodes;
size_t size;
switch (rmi_f54_get_reptype(f54, f54->input)) {
case F54_8BIT_IMAGE:
size = rx * tx;
break;
case F54_16BIT_IMAGE:
case F54_RAW_16BIT_IMAGE:
case F54_TRUE_BASELINE:
case F54_FULL_RAW_CAP:
case F54_FULL_RAW_CAP_RX_OFFSET_REMOVED:
size = sizeof(u16) * rx * tx;
break;
default:
size = 0;
}
return size;
}
static int rmi_f54_get_pixel_fmt(enum rmi_f54_report_type reptype, u32 *pixfmt)
{
int ret = 0;
switch (reptype) {
case F54_8BIT_IMAGE:
*pixfmt = V4L2_TCH_FMT_DELTA_TD08;
break;
case F54_16BIT_IMAGE:
*pixfmt = V4L2_TCH_FMT_DELTA_TD16;
break;
case F54_RAW_16BIT_IMAGE:
case F54_TRUE_BASELINE:
case F54_FULL_RAW_CAP:
case F54_FULL_RAW_CAP_RX_OFFSET_REMOVED:
*pixfmt = V4L2_TCH_FMT_TU16;
break;
case F54_REPORT_NONE:
case F54_MAX_REPORT_TYPE:
ret = -EINVAL;
break;
}
return ret;
}
static const struct v4l2_file_operations rmi_f54_video_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.release = vb2_fop_release,
.unlocked_ioctl = video_ioctl2,
.read = vb2_fop_read,
.mmap = vb2_fop_mmap,
.poll = vb2_fop_poll,
};
static int rmi_f54_queue_setup(struct vb2_queue *q, unsigned int *nbuffers,
unsigned int *nplanes, unsigned int sizes[],
struct device *alloc_devs[])
{
struct f54_data *f54 = q->drv_priv;
if (*nplanes)
return sizes[0] < rmi_f54_get_report_size(f54) ? -EINVAL : 0;
*nplanes = 1;
sizes[0] = rmi_f54_get_report_size(f54);
return 0;
}
static void rmi_f54_buffer_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct f54_data *f54 = vb2_get_drv_priv(vb->vb2_queue);
u16 *ptr;
enum vb2_buffer_state state;
enum rmi_f54_report_type reptype;
int ret;
mutex_lock(&f54->status_mutex);
vb2_set_plane_payload(vb, 0, 0);
reptype = rmi_f54_get_reptype(f54, f54->input);
if (reptype == F54_REPORT_NONE) {
state = VB2_BUF_STATE_ERROR;
goto done;
}
if (f54->is_busy) {
state = VB2_BUF_STATE_ERROR;
goto done;
}
ret = rmi_f54_request_report(f54->fn, reptype);
if (ret) {
dev_err(&f54->fn->dev, "Error requesting F54 report\n");
state = VB2_BUF_STATE_ERROR;
goto done;
}
/* get frame data */
mutex_lock(&f54->data_mutex);
while (f54->is_busy) {
mutex_unlock(&f54->data_mutex);
if (!wait_for_completion_timeout(&f54->cmd_done,
msecs_to_jiffies(1000))) {
dev_err(&f54->fn->dev, "Timed out\n");
state = VB2_BUF_STATE_ERROR;
goto done;
}
mutex_lock(&f54->data_mutex);
}
ptr = vb2_plane_vaddr(vb, 0);
if (!ptr) {
dev_err(&f54->fn->dev, "Error acquiring frame ptr\n");
state = VB2_BUF_STATE_ERROR;
goto data_done;
}
memcpy(ptr, f54->report_data, f54->report_size);
vb2_set_plane_payload(vb, 0, rmi_f54_get_report_size(f54));
state = VB2_BUF_STATE_DONE;
data_done:
mutex_unlock(&f54->data_mutex);
done:
vb->timestamp = ktime_get_ns();
vbuf->field = V4L2_FIELD_NONE;
vbuf->sequence = f54->sequence++;
vb2_buffer_done(vb, state);
mutex_unlock(&f54->status_mutex);
}
static void rmi_f54_stop_streaming(struct vb2_queue *q)
{
struct f54_data *f54 = vb2_get_drv_priv(q);
f54->sequence = 0;
}
/* V4L2 structures */
static const struct vb2_ops rmi_f54_queue_ops = {
.queue_setup = rmi_f54_queue_setup,
.buf_queue = rmi_f54_buffer_queue,
.stop_streaming = rmi_f54_stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
static const struct vb2_queue rmi_f54_queue = {
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ,
.buf_struct_size = sizeof(struct vb2_v4l2_buffer),
.ops = &rmi_f54_queue_ops,
.mem_ops = &vb2_vmalloc_memops,
.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC,
};
static int rmi_f54_vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct f54_data *f54 = video_drvdata(file);
strscpy(cap->driver, F54_NAME, sizeof(cap->driver));
strscpy(cap->card, SYNAPTICS_INPUT_DEVICE_NAME, sizeof(cap->card));
snprintf(cap->bus_info, sizeof(cap->bus_info),
"rmi4:%s", dev_name(&f54->fn->dev));
return 0;
}
static int rmi_f54_vidioc_enum_input(struct file *file, void *priv,
struct v4l2_input *i)
{
struct f54_data *f54 = video_drvdata(file);
enum rmi_f54_report_type reptype;
reptype = rmi_f54_get_reptype(f54, i->index);
if (reptype == F54_REPORT_NONE)
return -EINVAL;
i->type = V4L2_INPUT_TYPE_TOUCH;
strscpy(i->name, rmi_f54_report_type_names[reptype], sizeof(i->name));
return 0;
}
static int rmi_f54_set_input(struct f54_data *f54, unsigned int i)
{
struct rmi_device *rmi_dev = f54->fn->rmi_dev;
struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
u8 rx = drv_data->num_rx_electrodes ? : f54->num_rx_electrodes;
u8 tx = drv_data->num_tx_electrodes ? : f54->num_tx_electrodes;
struct v4l2_pix_format *f = &f54->format;
enum rmi_f54_report_type reptype;
int ret;
reptype = rmi_f54_get_reptype(f54, i);
if (reptype == F54_REPORT_NONE)
return -EINVAL;
ret = rmi_f54_get_pixel_fmt(reptype, &f->pixelformat);
if (ret)
return ret;
f54->input = i;
f->width = rx;
f->height = tx;
f->field = V4L2_FIELD_NONE;
f->colorspace = V4L2_COLORSPACE_RAW;
f->bytesperline = f->width * sizeof(u16);
f->sizeimage = f->width * f->height * sizeof(u16);
return 0;
}
static int rmi_f54_vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
return rmi_f54_set_input(video_drvdata(file), i);
}
static int rmi_f54_vidioc_g_input(struct file *file, void *priv,
unsigned int *i)
{
struct f54_data *f54 = video_drvdata(file);
*i = f54->input;
return 0;
}
static int rmi_f54_vidioc_fmt(struct file *file, void *priv,
struct v4l2_format *f)
{
struct f54_data *f54 = video_drvdata(file);
f->fmt.pix = f54->format;
return 0;
}
static int rmi_f54_vidioc_enum_fmt(struct file *file, void *priv,
struct v4l2_fmtdesc *fmt)
{
struct f54_data *f54 = video_drvdata(file);
if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (fmt->index)
return -EINVAL;
fmt->pixelformat = f54->format.pixelformat;
return 0;
}
static int rmi_f54_vidioc_g_parm(struct file *file, void *fh,
struct v4l2_streamparm *a)
{
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
a->parm.capture.readbuffers = 1;
a->parm.capture.timeperframe.numerator = 1;
a->parm.capture.timeperframe.denominator = 10;
return 0;
}
static const struct v4l2_ioctl_ops rmi_f54_video_ioctl_ops = {
.vidioc_querycap = rmi_f54_vidioc_querycap,
.vidioc_enum_fmt_vid_cap = rmi_f54_vidioc_enum_fmt,
.vidioc_s_fmt_vid_cap = rmi_f54_vidioc_fmt,
.vidioc_g_fmt_vid_cap = rmi_f54_vidioc_fmt,
.vidioc_try_fmt_vid_cap = rmi_f54_vidioc_fmt,
.vidioc_g_parm = rmi_f54_vidioc_g_parm,
.vidioc_enum_input = rmi_f54_vidioc_enum_input,
.vidioc_g_input = rmi_f54_vidioc_g_input,
.vidioc_s_input = rmi_f54_vidioc_s_input,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_expbuf = vb2_ioctl_expbuf,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
};
static const struct video_device rmi_f54_video_device = {
.name = "Synaptics RMI4",
.fops = &rmi_f54_video_fops,
.ioctl_ops = &rmi_f54_video_ioctl_ops,
.release = video_device_release_empty,
.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH |
V4L2_CAP_READWRITE | V4L2_CAP_STREAMING,
};
static void rmi_f54_work(struct work_struct *work)
{
struct f54_data *f54 = container_of(work, struct f54_data, work.work);
struct rmi_function *fn = f54->fn;
u8 fifo[2];
int report_size;
u8 command;
int error;
int i;
report_size = rmi_f54_get_report_size(f54);
if (report_size == 0) {
dev_err(&fn->dev, "Bad report size, report type=%d\n",
f54->report_type);
error = -EINVAL;
goto error; /* retry won't help */
}
mutex_lock(&f54->data_mutex);
/*
* Need to check if command has completed.
* If not try again later.
*/
error = rmi_read(fn->rmi_dev, f54->fn->fd.command_base_addr,
&command);
if (error) {
dev_err(&fn->dev, "Failed to read back command\n");
goto error;
}
if (command & F54_GET_REPORT) {
if (time_after(jiffies, f54->timeout)) {
dev_err(&fn->dev, "Get report command timed out\n");
error = -ETIMEDOUT;
}
report_size = 0;
goto error;
}
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Get report command completed, reading data\n");
for (i = 0; i < report_size; i += F54_REPORT_DATA_SIZE) {
int size = min(F54_REPORT_DATA_SIZE, report_size - i);
fifo[0] = i & 0xff;
fifo[1] = i >> 8;
error = rmi_write_block(fn->rmi_dev,
fn->fd.data_base_addr + F54_FIFO_OFFSET,
fifo, sizeof(fifo));
if (error) {
dev_err(&fn->dev, "Failed to set fifo start offset\n");
goto abort;
}
error = rmi_read_block(fn->rmi_dev, fn->fd.data_base_addr +
F54_REPORT_DATA_OFFSET,
f54->report_data + i, size);
if (error) {
dev_err(&fn->dev, "%s: read [%d bytes] returned %d\n",
__func__, size, error);
goto abort;
}
}
abort:
f54->report_size = error ? 0 : report_size;
error:
if (error)
report_size = 0;
if (report_size == 0 && !error) {
queue_delayed_work(f54->workqueue, &f54->work,
msecs_to_jiffies(1));
} else {
f54->is_busy = false;
complete(&f54->cmd_done);
}
mutex_unlock(&f54->data_mutex);
}
static int rmi_f54_config(struct rmi_function *fn)
{
struct rmi_driver *drv = fn->rmi_dev->driver;
drv->clear_irq_bits(fn->rmi_dev, fn->irq_mask);
return 0;
}
static int rmi_f54_detect(struct rmi_function *fn)
{
int error;
struct f54_data *f54;
u8 buf[6];
f54 = dev_get_drvdata(&fn->dev);
error = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr,
buf, sizeof(buf));
if (error) {
dev_err(&fn->dev, "%s: Failed to query F54 properties\n",
__func__);
return error;
}
f54->num_rx_electrodes = buf[0];
f54->num_tx_electrodes = buf[1];
f54->capabilities = buf[2];
f54->clock_rate = buf[3] | (buf[4] << 8);
f54->family = buf[5];
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F54 num_rx_electrodes: %d\n",
f54->num_rx_electrodes);
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F54 num_tx_electrodes: %d\n",
f54->num_tx_electrodes);
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F54 capabilities: 0x%x\n",
f54->capabilities);
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F54 clock rate: 0x%x\n",
f54->clock_rate);
rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F54 family: 0x%x\n",
f54->family);
f54->is_busy = false;
return 0;
}
static int rmi_f54_probe(struct rmi_function *fn)
{
struct f54_data *f54;
int ret;
u8 rx, tx;
f54 = devm_kzalloc(&fn->dev, sizeof(struct f54_data), GFP_KERNEL);
if (!f54)
return -ENOMEM;
f54->fn = fn;
dev_set_drvdata(&fn->dev, f54);
ret = rmi_f54_detect(fn);
if (ret)
return ret;
mutex_init(&f54->data_mutex);
mutex_init(&f54->status_mutex);
rx = f54->num_rx_electrodes;
tx = f54->num_tx_electrodes;
f54->report_data = devm_kzalloc(&fn->dev,
array3_size(tx, rx, sizeof(u16)),
GFP_KERNEL);
if (f54->report_data == NULL)
return -ENOMEM;
INIT_DELAYED_WORK(&f54->work, rmi_f54_work);
f54->workqueue = create_singlethread_workqueue("rmi4-poller");
if (!f54->workqueue)
return -ENOMEM;
rmi_f54_create_input_map(f54);
rmi_f54_set_input(f54, 0);
/* register video device */
strscpy(f54->v4l2.name, F54_NAME, sizeof(f54->v4l2.name));
ret = v4l2_device_register(&fn->dev, &f54->v4l2);
if (ret) {
dev_err(&fn->dev, "Unable to register video dev.\n");
goto remove_wq;
}
/* initialize the queue */
mutex_init(&f54->lock);
f54->queue = rmi_f54_queue;
f54->queue.drv_priv = f54;
f54->queue.lock = &f54->lock;
f54->queue.dev = &fn->dev;
ret = vb2_queue_init(&f54->queue);
if (ret)
goto remove_v4l2;
f54->vdev = rmi_f54_video_device;
f54->vdev.v4l2_dev = &f54->v4l2;
f54->vdev.lock = &f54->lock;
f54->vdev.vfl_dir = VFL_DIR_RX;
f54->vdev.queue = &f54->queue;
video_set_drvdata(&f54->vdev, f54);
ret = video_register_device(&f54->vdev, VFL_TYPE_TOUCH, -1);
if (ret) {
dev_err(&fn->dev, "Unable to register video subdevice.");
goto remove_v4l2;
}
return 0;
remove_v4l2:
v4l2_device_unregister(&f54->v4l2);
remove_wq:
cancel_delayed_work_sync(&f54->work);
destroy_workqueue(f54->workqueue);
return ret;
}
static void rmi_f54_remove(struct rmi_function *fn)
{
struct f54_data *f54 = dev_get_drvdata(&fn->dev);
video_unregister_device(&f54->vdev);
v4l2_device_unregister(&f54->v4l2);
destroy_workqueue(f54->workqueue);
}
struct rmi_function_handler rmi_f54_handler = {
.driver = {
.name = F54_NAME,
},
.func = 0x54,
.probe = rmi_f54_probe,
.config = rmi_f54_config,
.remove = rmi_f54_remove,
};
|
linux-master
|
drivers/input/rmi4/rmi_f54.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2012-2020 Synaptics Incorporated
*/
#include <linux/kernel.h>
#include <linux/rmi.h>
#include <linux/input.h>
#include <linux/slab.h>
#include "rmi_driver.h"
#define RMI_F3A_MAX_GPIO_COUNT 128
#define RMI_F3A_MAX_REG_SIZE DIV_ROUND_UP(RMI_F3A_MAX_GPIO_COUNT, 8)
/* Defs for Query 0 */
#define RMI_F3A_GPIO_COUNT 0x7F
#define RMI_F3A_DATA_REGS_MAX_SIZE RMI_F3A_MAX_REG_SIZE
#define TRACKSTICK_RANGE_START 3
#define TRACKSTICK_RANGE_END 6
struct f3a_data {
/* Query Data */
u8 gpio_count;
u8 register_count;
u8 data_regs[RMI_F3A_DATA_REGS_MAX_SIZE];
u16 *gpio_key_map;
struct input_dev *input;
struct rmi_function *f03;
bool trackstick_buttons;
};
static void rmi_f3a_report_button(struct rmi_function *fn,
struct f3a_data *f3a, unsigned int button)
{
u16 key_code = f3a->gpio_key_map[button];
bool key_down = !(f3a->data_regs[0] & BIT(button));
if (f3a->trackstick_buttons &&
button >= TRACKSTICK_RANGE_START &&
button <= TRACKSTICK_RANGE_END) {
rmi_f03_overwrite_button(f3a->f03, key_code, key_down);
} else {
rmi_dbg(RMI_DEBUG_FN, &fn->dev,
"%s: call input report key (0x%04x) value (0x%02x)",
__func__, key_code, key_down);
input_report_key(f3a->input, key_code, key_down);
}
}
static irqreturn_t rmi_f3a_attention(int irq, void *ctx)
{
struct rmi_function *fn = ctx;
struct f3a_data *f3a = dev_get_drvdata(&fn->dev);
struct rmi_driver_data *drvdata = dev_get_drvdata(&fn->rmi_dev->dev);
int error;
int i;
if (drvdata->attn_data.data) {
if (drvdata->attn_data.size < f3a->register_count) {
dev_warn(&fn->dev,
"F3A interrupted, but data is missing\n");
return IRQ_HANDLED;
}
memcpy(f3a->data_regs, drvdata->attn_data.data,
f3a->register_count);
drvdata->attn_data.data += f3a->register_count;
drvdata->attn_data.size -= f3a->register_count;
} else {
error = rmi_read_block(fn->rmi_dev, fn->fd.data_base_addr,
f3a->data_regs, f3a->register_count);
if (error) {
dev_err(&fn->dev,
"%s: Failed to read F3a data registers: %d\n",
__func__, error);
return IRQ_RETVAL(error);
}
}
for (i = 0; i < f3a->gpio_count; i++)
if (f3a->gpio_key_map[i] != KEY_RESERVED)
rmi_f3a_report_button(fn, f3a, i);
if (f3a->trackstick_buttons)
rmi_f03_commit_buttons(f3a->f03);
return IRQ_HANDLED;
}
static int rmi_f3a_config(struct rmi_function *fn)
{
struct f3a_data *f3a = dev_get_drvdata(&fn->dev);
struct rmi_driver *drv = fn->rmi_dev->driver;
const struct rmi_device_platform_data *pdata =
rmi_get_platform_data(fn->rmi_dev);
if (!f3a)
return 0;
if (pdata->gpio_data.trackstick_buttons) {
/* Try [re-]establish link to F03. */
f3a->f03 = rmi_find_function(fn->rmi_dev, 0x03);
f3a->trackstick_buttons = f3a->f03 != NULL;
}
drv->set_irq_bits(fn->rmi_dev, fn->irq_mask);
return 0;
}
static bool rmi_f3a_is_valid_button(int button, struct f3a_data *f3a,
u8 *query1_regs, u8 *ctrl1_regs)
{
/* gpio exist && direction input */
return (query1_regs[0] & BIT(button)) && !(ctrl1_regs[0] & BIT(button));
}
static int rmi_f3a_map_gpios(struct rmi_function *fn, struct f3a_data *f3a,
u8 *query1_regs, u8 *ctrl1_regs)
{
const struct rmi_device_platform_data *pdata =
rmi_get_platform_data(fn->rmi_dev);
struct input_dev *input = f3a->input;
unsigned int button = BTN_LEFT;
unsigned int trackstick_button = BTN_LEFT;
bool button_mapped = false;
int i;
int button_count = min_t(u8, f3a->gpio_count, TRACKSTICK_RANGE_END);
f3a->gpio_key_map = devm_kcalloc(&fn->dev,
button_count,
sizeof(f3a->gpio_key_map[0]),
GFP_KERNEL);
if (!f3a->gpio_key_map) {
dev_err(&fn->dev, "Failed to allocate gpio map memory.\n");
return -ENOMEM;
}
for (i = 0; i < button_count; i++) {
if (!rmi_f3a_is_valid_button(i, f3a, query1_regs, ctrl1_regs))
continue;
if (pdata->gpio_data.trackstick_buttons &&
i >= TRACKSTICK_RANGE_START &&
i < TRACKSTICK_RANGE_END) {
f3a->gpio_key_map[i] = trackstick_button++;
} else if (!pdata->gpio_data.buttonpad || !button_mapped) {
f3a->gpio_key_map[i] = button;
input_set_capability(input, EV_KEY, button++);
button_mapped = true;
}
}
input->keycode = f3a->gpio_key_map;
input->keycodesize = sizeof(f3a->gpio_key_map[0]);
input->keycodemax = f3a->gpio_count;
if (pdata->gpio_data.buttonpad || (button - BTN_LEFT == 1))
__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
return 0;
}
static int rmi_f3a_initialize(struct rmi_function *fn, struct f3a_data *f3a)
{
u8 query1[RMI_F3A_MAX_REG_SIZE];
u8 ctrl1[RMI_F3A_MAX_REG_SIZE];
u8 buf;
int error;
error = rmi_read(fn->rmi_dev, fn->fd.query_base_addr, &buf);
if (error < 0) {
dev_err(&fn->dev, "Failed to read general info register: %d\n",
error);
return -ENODEV;
}
f3a->gpio_count = buf & RMI_F3A_GPIO_COUNT;
f3a->register_count = DIV_ROUND_UP(f3a->gpio_count, 8);
/* Query1 -> gpio exist */
error = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr + 1,
query1, f3a->register_count);
if (error) {
dev_err(&fn->dev, "Failed to read query1 register\n");
return error;
}
/* Ctrl1 -> gpio direction */
error = rmi_read_block(fn->rmi_dev, fn->fd.control_base_addr + 1,
ctrl1, f3a->register_count);
if (error) {
dev_err(&fn->dev, "Failed to read control1 register\n");
return error;
}
error = rmi_f3a_map_gpios(fn, f3a, query1, ctrl1);
if (error)
return error;
return 0;
}
static int rmi_f3a_probe(struct rmi_function *fn)
{
struct rmi_device *rmi_dev = fn->rmi_dev;
struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
struct f3a_data *f3a;
int error;
if (!drv_data->input) {
dev_info(&fn->dev, "F3A: no input device found, ignoring\n");
return -ENXIO;
}
f3a = devm_kzalloc(&fn->dev, sizeof(*f3a), GFP_KERNEL);
if (!f3a)
return -ENOMEM;
f3a->input = drv_data->input;
error = rmi_f3a_initialize(fn, f3a);
if (error)
return error;
dev_set_drvdata(&fn->dev, f3a);
return 0;
}
struct rmi_function_handler rmi_f3a_handler = {
.driver = {
.name = "rmi4_f3a",
},
.func = 0x3a,
.probe = rmi_f3a_probe,
.config = rmi_f3a_config,
.attention = rmi_f3a_attention,
};
|
linux-master
|
drivers/input/rmi4/rmi_f3a.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2011-2016 Synaptics Incorporated
* Copyright (c) 2011 Unixphere
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/rmi.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>
#include <linux/of.h>
#include "rmi_driver.h"
#define RMI_SPI_DEFAULT_XFER_BUF_SIZE 64
#define RMI_PAGE_SELECT_REGISTER 0x00FF
#define RMI_SPI_PAGE(addr) (((addr) >> 8) & 0x80)
#define RMI_SPI_XFER_SIZE_LIMIT 255
#define BUFFER_SIZE_INCREMENT 32
enum rmi_spi_op {
RMI_SPI_WRITE = 0,
RMI_SPI_READ,
RMI_SPI_V2_READ_UNIFIED,
RMI_SPI_V2_READ_SPLIT,
RMI_SPI_V2_WRITE,
};
struct rmi_spi_cmd {
enum rmi_spi_op op;
u16 addr;
};
struct rmi_spi_xport {
struct rmi_transport_dev xport;
struct spi_device *spi;
struct mutex page_mutex;
int page;
u8 *rx_buf;
u8 *tx_buf;
int xfer_buf_size;
struct spi_transfer *rx_xfers;
struct spi_transfer *tx_xfers;
int rx_xfer_count;
int tx_xfer_count;
};
static int rmi_spi_manage_pools(struct rmi_spi_xport *rmi_spi, int len)
{
struct spi_device *spi = rmi_spi->spi;
int buf_size = rmi_spi->xfer_buf_size
? rmi_spi->xfer_buf_size : RMI_SPI_DEFAULT_XFER_BUF_SIZE;
struct spi_transfer *xfer_buf;
void *buf;
void *tmp;
while (buf_size < len)
buf_size *= 2;
if (buf_size > RMI_SPI_XFER_SIZE_LIMIT)
buf_size = RMI_SPI_XFER_SIZE_LIMIT;
tmp = rmi_spi->rx_buf;
buf = devm_kcalloc(&spi->dev, buf_size, 2,
GFP_KERNEL | GFP_DMA);
if (!buf)
return -ENOMEM;
rmi_spi->rx_buf = buf;
rmi_spi->tx_buf = &rmi_spi->rx_buf[buf_size];
rmi_spi->xfer_buf_size = buf_size;
if (tmp)
devm_kfree(&spi->dev, tmp);
if (rmi_spi->xport.pdata.spi_data.read_delay_us)
rmi_spi->rx_xfer_count = buf_size;
else
rmi_spi->rx_xfer_count = 1;
if (rmi_spi->xport.pdata.spi_data.write_delay_us)
rmi_spi->tx_xfer_count = buf_size;
else
rmi_spi->tx_xfer_count = 1;
/*
* Allocate a pool of spi_transfer buffers for devices which need
* per byte delays.
*/
tmp = rmi_spi->rx_xfers;
xfer_buf = devm_kcalloc(&spi->dev,
rmi_spi->rx_xfer_count + rmi_spi->tx_xfer_count,
sizeof(struct spi_transfer),
GFP_KERNEL);
if (!xfer_buf)
return -ENOMEM;
rmi_spi->rx_xfers = xfer_buf;
rmi_spi->tx_xfers = &xfer_buf[rmi_spi->rx_xfer_count];
if (tmp)
devm_kfree(&spi->dev, tmp);
return 0;
}
static int rmi_spi_xfer(struct rmi_spi_xport *rmi_spi,
const struct rmi_spi_cmd *cmd, const u8 *tx_buf,
int tx_len, u8 *rx_buf, int rx_len)
{
struct spi_device *spi = rmi_spi->spi;
struct rmi_device_platform_data_spi *spi_data =
&rmi_spi->xport.pdata.spi_data;
struct spi_message msg;
struct spi_transfer *xfer;
int ret = 0;
int len;
int cmd_len = 0;
int total_tx_len;
int i;
u16 addr = cmd->addr;
spi_message_init(&msg);
switch (cmd->op) {
case RMI_SPI_WRITE:
case RMI_SPI_READ:
cmd_len += 2;
break;
case RMI_SPI_V2_READ_UNIFIED:
case RMI_SPI_V2_READ_SPLIT:
case RMI_SPI_V2_WRITE:
cmd_len += 4;
break;
}
total_tx_len = cmd_len + tx_len;
len = max(total_tx_len, rx_len);
if (len > RMI_SPI_XFER_SIZE_LIMIT)
return -EINVAL;
if (rmi_spi->xfer_buf_size < len) {
ret = rmi_spi_manage_pools(rmi_spi, len);
if (ret < 0)
return ret;
}
if (addr == 0)
/*
* SPI needs an address. Use 0x7FF if we want to keep
* reading from the last position of the register pointer.
*/
addr = 0x7FF;
switch (cmd->op) {
case RMI_SPI_WRITE:
rmi_spi->tx_buf[0] = (addr >> 8);
rmi_spi->tx_buf[1] = addr & 0xFF;
break;
case RMI_SPI_READ:
rmi_spi->tx_buf[0] = (addr >> 8) | 0x80;
rmi_spi->tx_buf[1] = addr & 0xFF;
break;
case RMI_SPI_V2_READ_UNIFIED:
break;
case RMI_SPI_V2_READ_SPLIT:
break;
case RMI_SPI_V2_WRITE:
rmi_spi->tx_buf[0] = 0x40;
rmi_spi->tx_buf[1] = (addr >> 8) & 0xFF;
rmi_spi->tx_buf[2] = addr & 0xFF;
rmi_spi->tx_buf[3] = tx_len;
break;
}
if (tx_buf)
memcpy(&rmi_spi->tx_buf[cmd_len], tx_buf, tx_len);
if (rmi_spi->tx_xfer_count > 1) {
for (i = 0; i < total_tx_len; i++) {
xfer = &rmi_spi->tx_xfers[i];
memset(xfer, 0, sizeof(struct spi_transfer));
xfer->tx_buf = &rmi_spi->tx_buf[i];
xfer->len = 1;
xfer->delay.value = spi_data->write_delay_us;
xfer->delay.unit = SPI_DELAY_UNIT_USECS;
spi_message_add_tail(xfer, &msg);
}
} else {
xfer = rmi_spi->tx_xfers;
memset(xfer, 0, sizeof(struct spi_transfer));
xfer->tx_buf = rmi_spi->tx_buf;
xfer->len = total_tx_len;
spi_message_add_tail(xfer, &msg);
}
rmi_dbg(RMI_DEBUG_XPORT, &spi->dev, "%s: cmd: %s tx_buf len: %d tx_buf: %*ph\n",
__func__, cmd->op == RMI_SPI_WRITE ? "WRITE" : "READ",
total_tx_len, total_tx_len, rmi_spi->tx_buf);
if (rx_buf) {
if (rmi_spi->rx_xfer_count > 1) {
for (i = 0; i < rx_len; i++) {
xfer = &rmi_spi->rx_xfers[i];
memset(xfer, 0, sizeof(struct spi_transfer));
xfer->rx_buf = &rmi_spi->rx_buf[i];
xfer->len = 1;
xfer->delay.value = spi_data->read_delay_us;
xfer->delay.unit = SPI_DELAY_UNIT_USECS;
spi_message_add_tail(xfer, &msg);
}
} else {
xfer = rmi_spi->rx_xfers;
memset(xfer, 0, sizeof(struct spi_transfer));
xfer->rx_buf = rmi_spi->rx_buf;
xfer->len = rx_len;
spi_message_add_tail(xfer, &msg);
}
}
ret = spi_sync(spi, &msg);
if (ret < 0) {
dev_err(&spi->dev, "spi xfer failed: %d\n", ret);
return ret;
}
if (rx_buf) {
memcpy(rx_buf, rmi_spi->rx_buf, rx_len);
rmi_dbg(RMI_DEBUG_XPORT, &spi->dev, "%s: (%d) %*ph\n",
__func__, rx_len, rx_len, rx_buf);
}
return 0;
}
/*
* rmi_set_page - Set RMI page
* @xport: The pointer to the rmi_transport_dev struct
* @page: The new page address.
*
* RMI devices have 16-bit addressing, but some of the transport
* implementations (like SMBus) only have 8-bit addressing. So RMI implements
* a page address at 0xff of every page so we can reliable page addresses
* every 256 registers.
*
* The page_mutex lock must be held when this function is entered.
*
* Returns zero on success, non-zero on failure.
*/
static int rmi_set_page(struct rmi_spi_xport *rmi_spi, u8 page)
{
struct rmi_spi_cmd cmd;
int ret;
cmd.op = RMI_SPI_WRITE;
cmd.addr = RMI_PAGE_SELECT_REGISTER;
ret = rmi_spi_xfer(rmi_spi, &cmd, &page, 1, NULL, 0);
if (ret)
rmi_spi->page = page;
return ret;
}
static int rmi_spi_write_block(struct rmi_transport_dev *xport, u16 addr,
const void *buf, size_t len)
{
struct rmi_spi_xport *rmi_spi =
container_of(xport, struct rmi_spi_xport, xport);
struct rmi_spi_cmd cmd;
int ret;
mutex_lock(&rmi_spi->page_mutex);
if (RMI_SPI_PAGE(addr) != rmi_spi->page) {
ret = rmi_set_page(rmi_spi, RMI_SPI_PAGE(addr));
if (ret)
goto exit;
}
cmd.op = RMI_SPI_WRITE;
cmd.addr = addr;
ret = rmi_spi_xfer(rmi_spi, &cmd, buf, len, NULL, 0);
exit:
mutex_unlock(&rmi_spi->page_mutex);
return ret;
}
static int rmi_spi_read_block(struct rmi_transport_dev *xport, u16 addr,
void *buf, size_t len)
{
struct rmi_spi_xport *rmi_spi =
container_of(xport, struct rmi_spi_xport, xport);
struct rmi_spi_cmd cmd;
int ret;
mutex_lock(&rmi_spi->page_mutex);
if (RMI_SPI_PAGE(addr) != rmi_spi->page) {
ret = rmi_set_page(rmi_spi, RMI_SPI_PAGE(addr));
if (ret)
goto exit;
}
cmd.op = RMI_SPI_READ;
cmd.addr = addr;
ret = rmi_spi_xfer(rmi_spi, &cmd, NULL, 0, buf, len);
exit:
mutex_unlock(&rmi_spi->page_mutex);
return ret;
}
static const struct rmi_transport_ops rmi_spi_ops = {
.write_block = rmi_spi_write_block,
.read_block = rmi_spi_read_block,
};
#ifdef CONFIG_OF
static int rmi_spi_of_probe(struct spi_device *spi,
struct rmi_device_platform_data *pdata)
{
struct device *dev = &spi->dev;
int retval;
retval = rmi_of_property_read_u32(dev,
&pdata->spi_data.read_delay_us,
"spi-rx-delay-us", 1);
if (retval)
return retval;
retval = rmi_of_property_read_u32(dev,
&pdata->spi_data.write_delay_us,
"spi-tx-delay-us", 1);
if (retval)
return retval;
return 0;
}
static const struct of_device_id rmi_spi_of_match[] = {
{ .compatible = "syna,rmi4-spi" },
{},
};
MODULE_DEVICE_TABLE(of, rmi_spi_of_match);
#else
static inline int rmi_spi_of_probe(struct spi_device *spi,
struct rmi_device_platform_data *pdata)
{
return -ENODEV;
}
#endif
static void rmi_spi_unregister_transport(void *data)
{
struct rmi_spi_xport *rmi_spi = data;
rmi_unregister_transport_device(&rmi_spi->xport);
}
static int rmi_spi_probe(struct spi_device *spi)
{
struct rmi_spi_xport *rmi_spi;
struct rmi_device_platform_data *pdata;
struct rmi_device_platform_data *spi_pdata = spi->dev.platform_data;
int error;
if (spi->master->flags & SPI_MASTER_HALF_DUPLEX)
return -EINVAL;
rmi_spi = devm_kzalloc(&spi->dev, sizeof(struct rmi_spi_xport),
GFP_KERNEL);
if (!rmi_spi)
return -ENOMEM;
pdata = &rmi_spi->xport.pdata;
if (spi->dev.of_node) {
error = rmi_spi_of_probe(spi, pdata);
if (error)
return error;
} else if (spi_pdata) {
*pdata = *spi_pdata;
}
if (pdata->spi_data.bits_per_word)
spi->bits_per_word = pdata->spi_data.bits_per_word;
if (pdata->spi_data.mode)
spi->mode = pdata->spi_data.mode;
error = spi_setup(spi);
if (error < 0) {
dev_err(&spi->dev, "spi_setup failed!\n");
return error;
}
pdata->irq = spi->irq;
rmi_spi->spi = spi;
mutex_init(&rmi_spi->page_mutex);
rmi_spi->xport.dev = &spi->dev;
rmi_spi->xport.proto_name = "spi";
rmi_spi->xport.ops = &rmi_spi_ops;
spi_set_drvdata(spi, rmi_spi);
error = rmi_spi_manage_pools(rmi_spi, RMI_SPI_DEFAULT_XFER_BUF_SIZE);
if (error)
return error;
/*
* Setting the page to zero will (a) make sure the PSR is in a
* known state, and (b) make sure we can talk to the device.
*/
error = rmi_set_page(rmi_spi, 0);
if (error) {
dev_err(&spi->dev, "Failed to set page select to 0.\n");
return error;
}
dev_info(&spi->dev, "registering SPI-connected sensor\n");
error = rmi_register_transport_device(&rmi_spi->xport);
if (error) {
dev_err(&spi->dev, "failed to register sensor: %d\n", error);
return error;
}
error = devm_add_action_or_reset(&spi->dev,
rmi_spi_unregister_transport,
rmi_spi);
if (error)
return error;
return 0;
}
static int rmi_spi_suspend(struct device *dev)
{
struct spi_device *spi = to_spi_device(dev);
struct rmi_spi_xport *rmi_spi = spi_get_drvdata(spi);
int ret;
ret = rmi_driver_suspend(rmi_spi->xport.rmi_dev, true);
if (ret)
dev_warn(dev, "Failed to resume device: %d\n", ret);
return ret;
}
static int rmi_spi_resume(struct device *dev)
{
struct spi_device *spi = to_spi_device(dev);
struct rmi_spi_xport *rmi_spi = spi_get_drvdata(spi);
int ret;
ret = rmi_driver_resume(rmi_spi->xport.rmi_dev, true);
if (ret)
dev_warn(dev, "Failed to resume device: %d\n", ret);
return ret;
}
static int rmi_spi_runtime_suspend(struct device *dev)
{
struct spi_device *spi = to_spi_device(dev);
struct rmi_spi_xport *rmi_spi = spi_get_drvdata(spi);
int ret;
ret = rmi_driver_suspend(rmi_spi->xport.rmi_dev, false);
if (ret)
dev_warn(dev, "Failed to resume device: %d\n", ret);
return 0;
}
static int rmi_spi_runtime_resume(struct device *dev)
{
struct spi_device *spi = to_spi_device(dev);
struct rmi_spi_xport *rmi_spi = spi_get_drvdata(spi);
int ret;
ret = rmi_driver_resume(rmi_spi->xport.rmi_dev, false);
if (ret)
dev_warn(dev, "Failed to resume device: %d\n", ret);
return 0;
}
static const struct dev_pm_ops rmi_spi_pm = {
SYSTEM_SLEEP_PM_OPS(rmi_spi_suspend, rmi_spi_resume)
RUNTIME_PM_OPS(rmi_spi_runtime_suspend, rmi_spi_runtime_resume, NULL)
};
static const struct spi_device_id rmi_id[] = {
{ "rmi4-spi", 0 },
{ }
};
MODULE_DEVICE_TABLE(spi, rmi_id);
static struct spi_driver rmi_spi_driver = {
.driver = {
.name = "rmi4_spi",
.pm = pm_ptr(&rmi_spi_pm),
.of_match_table = of_match_ptr(rmi_spi_of_match),
},
.id_table = rmi_id,
.probe = rmi_spi_probe,
};
module_spi_driver(rmi_spi_driver);
MODULE_AUTHOR("Christopher Heiny <[email protected]>");
MODULE_AUTHOR("Andrew Duggan <[email protected]>");
MODULE_DESCRIPTION("RMI SPI driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/rmi4/rmi_spi.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2015-2016 Red Hat
* Copyright (C) 2015 Lyude Paul <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/serio.h>
#include <linux/notifier.h>
#include "rmi_driver.h"
#define RMI_F03_RX_DATA_OFB 0x01
#define RMI_F03_OB_SIZE 2
#define RMI_F03_OB_OFFSET 2
#define RMI_F03_OB_DATA_OFFSET 1
#define RMI_F03_OB_FLAG_TIMEOUT BIT(6)
#define RMI_F03_OB_FLAG_PARITY BIT(7)
#define RMI_F03_DEVICE_COUNT 0x07
#define RMI_F03_BYTES_PER_DEVICE 0x07
#define RMI_F03_BYTES_PER_DEVICE_SHIFT 4
#define RMI_F03_QUEUE_LENGTH 0x0F
#define PSMOUSE_OOB_EXTRA_BTNS 0x01
struct f03_data {
struct rmi_function *fn;
struct serio *serio;
bool serio_registered;
unsigned int overwrite_buttons;
u8 device_count;
u8 rx_queue_length;
};
int rmi_f03_overwrite_button(struct rmi_function *fn, unsigned int button,
int value)
{
struct f03_data *f03 = dev_get_drvdata(&fn->dev);
unsigned int bit;
if (button < BTN_LEFT || button > BTN_MIDDLE)
return -EINVAL;
bit = BIT(button - BTN_LEFT);
if (value)
f03->overwrite_buttons |= bit;
else
f03->overwrite_buttons &= ~bit;
return 0;
}
void rmi_f03_commit_buttons(struct rmi_function *fn)
{
struct f03_data *f03 = dev_get_drvdata(&fn->dev);
struct serio *serio = f03->serio;
serio_pause_rx(serio);
if (serio->drv) {
serio->drv->interrupt(serio, PSMOUSE_OOB_EXTRA_BTNS,
SERIO_OOB_DATA);
serio->drv->interrupt(serio, f03->overwrite_buttons,
SERIO_OOB_DATA);
}
serio_continue_rx(serio);
}
static int rmi_f03_pt_write(struct serio *id, unsigned char val)
{
struct f03_data *f03 = id->port_data;
int error;
rmi_dbg(RMI_DEBUG_FN, &f03->fn->dev,
"%s: Wrote %.2hhx to PS/2 passthrough address",
__func__, val);
error = rmi_write(f03->fn->rmi_dev, f03->fn->fd.data_base_addr, val);
if (error) {
dev_err(&f03->fn->dev,
"%s: Failed to write to F03 TX register (%d).\n",
__func__, error);
return error;
}
return 0;
}
static int rmi_f03_initialize(struct f03_data *f03)
{
struct rmi_function *fn = f03->fn;
struct device *dev = &fn->dev;
int error;
u8 bytes_per_device;
u8 query1;
u8 query2[RMI_F03_DEVICE_COUNT * RMI_F03_BYTES_PER_DEVICE];
size_t query2_len;
error = rmi_read(fn->rmi_dev, fn->fd.query_base_addr, &query1);
if (error) {
dev_err(dev, "Failed to read query register (%d).\n", error);
return error;
}
f03->device_count = query1 & RMI_F03_DEVICE_COUNT;
bytes_per_device = (query1 >> RMI_F03_BYTES_PER_DEVICE_SHIFT) &
RMI_F03_BYTES_PER_DEVICE;
query2_len = f03->device_count * bytes_per_device;
/*
* The first generation of image sensors don't have a second part to
* their f03 query, as such we have to set some of these values manually
*/
if (query2_len < 1) {
f03->device_count = 1;
f03->rx_queue_length = 7;
} else {
error = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr + 1,
query2, query2_len);
if (error) {
dev_err(dev,
"Failed to read second set of query registers (%d).\n",
error);
return error;
}
f03->rx_queue_length = query2[0] & RMI_F03_QUEUE_LENGTH;
}
return 0;
}
static int rmi_f03_pt_open(struct serio *serio)
{
struct f03_data *f03 = serio->port_data;
struct rmi_function *fn = f03->fn;
const u8 ob_len = f03->rx_queue_length * RMI_F03_OB_SIZE;
const u16 data_addr = fn->fd.data_base_addr + RMI_F03_OB_OFFSET;
u8 obs[RMI_F03_QUEUE_LENGTH * RMI_F03_OB_SIZE];
int error;
/*
* Consume any pending data. Some devices like to spam with
* 0xaa 0x00 announcements which may confuse us as we try to
* probe the device.
*/
error = rmi_read_block(fn->rmi_dev, data_addr, &obs, ob_len);
if (!error)
rmi_dbg(RMI_DEBUG_FN, &fn->dev,
"%s: Consumed %*ph (%d) from PS2 guest\n",
__func__, ob_len, obs, ob_len);
return fn->rmi_dev->driver->set_irq_bits(fn->rmi_dev, fn->irq_mask);
}
static void rmi_f03_pt_close(struct serio *serio)
{
struct f03_data *f03 = serio->port_data;
struct rmi_function *fn = f03->fn;
fn->rmi_dev->driver->clear_irq_bits(fn->rmi_dev, fn->irq_mask);
}
static int rmi_f03_register_pt(struct f03_data *f03)
{
struct serio *serio;
serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
if (!serio)
return -ENOMEM;
serio->id.type = SERIO_PS_PSTHRU;
serio->write = rmi_f03_pt_write;
serio->open = rmi_f03_pt_open;
serio->close = rmi_f03_pt_close;
serio->port_data = f03;
strscpy(serio->name, "RMI4 PS/2 pass-through", sizeof(serio->name));
snprintf(serio->phys, sizeof(serio->phys), "%s/serio0",
dev_name(&f03->fn->dev));
serio->dev.parent = &f03->fn->dev;
f03->serio = serio;
printk(KERN_INFO "serio: %s port at %s\n",
serio->name, dev_name(&f03->fn->dev));
serio_register_port(serio);
return 0;
}
static int rmi_f03_probe(struct rmi_function *fn)
{
struct device *dev = &fn->dev;
struct f03_data *f03;
int error;
f03 = devm_kzalloc(dev, sizeof(struct f03_data), GFP_KERNEL);
if (!f03)
return -ENOMEM;
f03->fn = fn;
error = rmi_f03_initialize(f03);
if (error < 0)
return error;
if (f03->device_count != 1)
dev_warn(dev, "found %d devices on PS/2 passthrough",
f03->device_count);
dev_set_drvdata(dev, f03);
return 0;
}
static int rmi_f03_config(struct rmi_function *fn)
{
struct f03_data *f03 = dev_get_drvdata(&fn->dev);
int error;
if (!f03->serio_registered) {
error = rmi_f03_register_pt(f03);
if (error)
return error;
f03->serio_registered = true;
} else {
/*
* We must be re-configuring the sensor, just enable
* interrupts for this function.
*/
fn->rmi_dev->driver->set_irq_bits(fn->rmi_dev, fn->irq_mask);
}
return 0;
}
static irqreturn_t rmi_f03_attention(int irq, void *ctx)
{
struct rmi_function *fn = ctx;
struct rmi_device *rmi_dev = fn->rmi_dev;
struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev);
struct f03_data *f03 = dev_get_drvdata(&fn->dev);
const u16 data_addr = fn->fd.data_base_addr + RMI_F03_OB_OFFSET;
const u8 ob_len = f03->rx_queue_length * RMI_F03_OB_SIZE;
u8 obs[RMI_F03_QUEUE_LENGTH * RMI_F03_OB_SIZE];
u8 ob_status;
u8 ob_data;
unsigned int serio_flags;
int i;
int error;
if (drvdata->attn_data.data) {
/* First grab the data passed by the transport device */
if (drvdata->attn_data.size < ob_len) {
dev_warn(&fn->dev, "F03 interrupted, but data is missing!\n");
return IRQ_HANDLED;
}
memcpy(obs, drvdata->attn_data.data, ob_len);
drvdata->attn_data.data += ob_len;
drvdata->attn_data.size -= ob_len;
} else {
/* Grab all of the data registers, and check them for data */
error = rmi_read_block(fn->rmi_dev, data_addr, &obs, ob_len);
if (error) {
dev_err(&fn->dev,
"%s: Failed to read F03 output buffers: %d\n",
__func__, error);
serio_interrupt(f03->serio, 0, SERIO_TIMEOUT);
return IRQ_RETVAL(error);
}
}
for (i = 0; i < ob_len; i += RMI_F03_OB_SIZE) {
ob_status = obs[i];
ob_data = obs[i + RMI_F03_OB_DATA_OFFSET];
serio_flags = 0;
if (!(ob_status & RMI_F03_RX_DATA_OFB))
continue;
if (ob_status & RMI_F03_OB_FLAG_TIMEOUT)
serio_flags |= SERIO_TIMEOUT;
if (ob_status & RMI_F03_OB_FLAG_PARITY)
serio_flags |= SERIO_PARITY;
rmi_dbg(RMI_DEBUG_FN, &fn->dev,
"%s: Received %.2hhx from PS2 guest T: %c P: %c\n",
__func__, ob_data,
serio_flags & SERIO_TIMEOUT ? 'Y' : 'N',
serio_flags & SERIO_PARITY ? 'Y' : 'N');
serio_interrupt(f03->serio, ob_data, serio_flags);
}
return IRQ_HANDLED;
}
static void rmi_f03_remove(struct rmi_function *fn)
{
struct f03_data *f03 = dev_get_drvdata(&fn->dev);
if (f03->serio_registered)
serio_unregister_port(f03->serio);
}
struct rmi_function_handler rmi_f03_handler = {
.driver = {
.name = "rmi4_f03",
},
.func = 0x03,
.probe = rmi_f03_probe,
.config = rmi_f03_config,
.attention = rmi_f03_attention,
.remove = rmi_f03_remove,
};
MODULE_AUTHOR("Lyude Paul <[email protected]>");
MODULE_DESCRIPTION("RMI F03 module");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/rmi4/rmi_f03.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2011-2016 Synaptics Incorporated
* Copyright (c) 2011 Unixphere
*/
#include <linux/i2c.h>
#include <linux/rmi.h>
#include <linux/of.h>
#include <linux/delay.h>
#include <linux/regulator/consumer.h>
#include "rmi_driver.h"
#define BUFFER_SIZE_INCREMENT 32
/**
* struct rmi_i2c_xport - stores information for i2c communication
*
* @xport: The transport interface structure
* @client: The I2C client device structure
*
* @page_mutex: Locks current page to avoid changing pages in unexpected ways.
* @page: Keeps track of the current virtual page
*
* @tx_buf: Buffer used for transmitting data to the sensor over i2c.
* @tx_buf_size: Size of the buffer
*
* @supplies: Array of voltage regulators
* @startup_delay: Milliseconds to pause after powering up the regulators
*/
struct rmi_i2c_xport {
struct rmi_transport_dev xport;
struct i2c_client *client;
struct mutex page_mutex;
int page;
u8 *tx_buf;
size_t tx_buf_size;
struct regulator_bulk_data supplies[2];
u32 startup_delay;
};
#define RMI_PAGE_SELECT_REGISTER 0xff
#define RMI_I2C_PAGE(addr) (((addr) >> 8) & 0xff)
/*
* rmi_set_page - Set RMI page
* @xport: The pointer to the rmi_transport_dev struct
* @page: The new page address.
*
* RMI devices have 16-bit addressing, but some of the transport
* implementations (like SMBus) only have 8-bit addressing. So RMI implements
* a page address at 0xff of every page so we can reliable page addresses
* every 256 registers.
*
* The page_mutex lock must be held when this function is entered.
*
* Returns zero on success, non-zero on failure.
*/
static int rmi_set_page(struct rmi_i2c_xport *rmi_i2c, u8 page)
{
struct i2c_client *client = rmi_i2c->client;
u8 txbuf[2] = {RMI_PAGE_SELECT_REGISTER, page};
int retval;
retval = i2c_master_send(client, txbuf, sizeof(txbuf));
if (retval != sizeof(txbuf)) {
dev_err(&client->dev,
"%s: set page failed: %d.", __func__, retval);
return (retval < 0) ? retval : -EIO;
}
rmi_i2c->page = page;
return 0;
}
static int rmi_i2c_write_block(struct rmi_transport_dev *xport, u16 addr,
const void *buf, size_t len)
{
struct rmi_i2c_xport *rmi_i2c =
container_of(xport, struct rmi_i2c_xport, xport);
struct i2c_client *client = rmi_i2c->client;
size_t tx_size = len + 1;
int retval;
mutex_lock(&rmi_i2c->page_mutex);
if (!rmi_i2c->tx_buf || rmi_i2c->tx_buf_size < tx_size) {
if (rmi_i2c->tx_buf)
devm_kfree(&client->dev, rmi_i2c->tx_buf);
rmi_i2c->tx_buf_size = tx_size + BUFFER_SIZE_INCREMENT;
rmi_i2c->tx_buf = devm_kzalloc(&client->dev,
rmi_i2c->tx_buf_size,
GFP_KERNEL);
if (!rmi_i2c->tx_buf) {
rmi_i2c->tx_buf_size = 0;
retval = -ENOMEM;
goto exit;
}
}
rmi_i2c->tx_buf[0] = addr & 0xff;
memcpy(rmi_i2c->tx_buf + 1, buf, len);
if (RMI_I2C_PAGE(addr) != rmi_i2c->page) {
retval = rmi_set_page(rmi_i2c, RMI_I2C_PAGE(addr));
if (retval)
goto exit;
}
retval = i2c_master_send(client, rmi_i2c->tx_buf, tx_size);
if (retval == tx_size)
retval = 0;
else if (retval >= 0)
retval = -EIO;
exit:
rmi_dbg(RMI_DEBUG_XPORT, &client->dev,
"write %zd bytes at %#06x: %d (%*ph)\n",
len, addr, retval, (int)len, buf);
mutex_unlock(&rmi_i2c->page_mutex);
return retval;
}
static int rmi_i2c_read_block(struct rmi_transport_dev *xport, u16 addr,
void *buf, size_t len)
{
struct rmi_i2c_xport *rmi_i2c =
container_of(xport, struct rmi_i2c_xport, xport);
struct i2c_client *client = rmi_i2c->client;
u8 addr_offset = addr & 0xff;
int retval;
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.len = sizeof(addr_offset),
.buf = &addr_offset,
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = len,
.buf = buf,
},
};
mutex_lock(&rmi_i2c->page_mutex);
if (RMI_I2C_PAGE(addr) != rmi_i2c->page) {
retval = rmi_set_page(rmi_i2c, RMI_I2C_PAGE(addr));
if (retval)
goto exit;
}
retval = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (retval == ARRAY_SIZE(msgs))
retval = 0; /* success */
else if (retval >= 0)
retval = -EIO;
exit:
rmi_dbg(RMI_DEBUG_XPORT, &client->dev,
"read %zd bytes at %#06x: %d (%*ph)\n",
len, addr, retval, (int)len, buf);
mutex_unlock(&rmi_i2c->page_mutex);
return retval;
}
static const struct rmi_transport_ops rmi_i2c_ops = {
.write_block = rmi_i2c_write_block,
.read_block = rmi_i2c_read_block,
};
#ifdef CONFIG_OF
static const struct of_device_id rmi_i2c_of_match[] = {
{ .compatible = "syna,rmi4-i2c" },
{},
};
MODULE_DEVICE_TABLE(of, rmi_i2c_of_match);
#endif
static void rmi_i2c_regulator_bulk_disable(void *data)
{
struct rmi_i2c_xport *rmi_i2c = data;
regulator_bulk_disable(ARRAY_SIZE(rmi_i2c->supplies),
rmi_i2c->supplies);
}
static void rmi_i2c_unregister_transport(void *data)
{
struct rmi_i2c_xport *rmi_i2c = data;
rmi_unregister_transport_device(&rmi_i2c->xport);
}
static int rmi_i2c_probe(struct i2c_client *client)
{
struct rmi_device_platform_data *pdata;
struct rmi_device_platform_data *client_pdata =
dev_get_platdata(&client->dev);
struct rmi_i2c_xport *rmi_i2c;
int error;
rmi_i2c = devm_kzalloc(&client->dev, sizeof(struct rmi_i2c_xport),
GFP_KERNEL);
if (!rmi_i2c)
return -ENOMEM;
pdata = &rmi_i2c->xport.pdata;
if (!client->dev.of_node && client_pdata)
*pdata = *client_pdata;
pdata->irq = client->irq;
rmi_dbg(RMI_DEBUG_XPORT, &client->dev, "Probing %s.\n",
dev_name(&client->dev));
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev,
"adapter does not support required functionality\n");
return -ENODEV;
}
rmi_i2c->supplies[0].supply = "vdd";
rmi_i2c->supplies[1].supply = "vio";
error = devm_regulator_bulk_get(&client->dev,
ARRAY_SIZE(rmi_i2c->supplies),
rmi_i2c->supplies);
if (error < 0)
return error;
error = regulator_bulk_enable(ARRAY_SIZE(rmi_i2c->supplies),
rmi_i2c->supplies);
if (error < 0)
return error;
error = devm_add_action_or_reset(&client->dev,
rmi_i2c_regulator_bulk_disable,
rmi_i2c);
if (error)
return error;
of_property_read_u32(client->dev.of_node, "syna,startup-delay-ms",
&rmi_i2c->startup_delay);
msleep(rmi_i2c->startup_delay);
rmi_i2c->client = client;
mutex_init(&rmi_i2c->page_mutex);
rmi_i2c->xport.dev = &client->dev;
rmi_i2c->xport.proto_name = "i2c";
rmi_i2c->xport.ops = &rmi_i2c_ops;
i2c_set_clientdata(client, rmi_i2c);
/*
* Setting the page to zero will (a) make sure the PSR is in a
* known state, and (b) make sure we can talk to the device.
*/
error = rmi_set_page(rmi_i2c, 0);
if (error) {
dev_err(&client->dev, "Failed to set page select to 0\n");
return error;
}
dev_info(&client->dev, "registering I2C-connected sensor\n");
error = rmi_register_transport_device(&rmi_i2c->xport);
if (error) {
dev_err(&client->dev, "failed to register sensor: %d\n", error);
return error;
}
error = devm_add_action_or_reset(&client->dev,
rmi_i2c_unregister_transport,
rmi_i2c);
if (error)
return error;
return 0;
}
static int rmi_i2c_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct rmi_i2c_xport *rmi_i2c = i2c_get_clientdata(client);
int ret;
ret = rmi_driver_suspend(rmi_i2c->xport.rmi_dev, true);
if (ret)
dev_warn(dev, "Failed to resume device: %d\n", ret);
regulator_bulk_disable(ARRAY_SIZE(rmi_i2c->supplies),
rmi_i2c->supplies);
return ret;
}
static int rmi_i2c_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct rmi_i2c_xport *rmi_i2c = i2c_get_clientdata(client);
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(rmi_i2c->supplies),
rmi_i2c->supplies);
if (ret)
return ret;
msleep(rmi_i2c->startup_delay);
ret = rmi_driver_resume(rmi_i2c->xport.rmi_dev, true);
if (ret)
dev_warn(dev, "Failed to resume device: %d\n", ret);
return ret;
}
static int rmi_i2c_runtime_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct rmi_i2c_xport *rmi_i2c = i2c_get_clientdata(client);
int ret;
ret = rmi_driver_suspend(rmi_i2c->xport.rmi_dev, false);
if (ret)
dev_warn(dev, "Failed to resume device: %d\n", ret);
regulator_bulk_disable(ARRAY_SIZE(rmi_i2c->supplies),
rmi_i2c->supplies);
return 0;
}
static int rmi_i2c_runtime_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct rmi_i2c_xport *rmi_i2c = i2c_get_clientdata(client);
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(rmi_i2c->supplies),
rmi_i2c->supplies);
if (ret)
return ret;
msleep(rmi_i2c->startup_delay);
ret = rmi_driver_resume(rmi_i2c->xport.rmi_dev, false);
if (ret)
dev_warn(dev, "Failed to resume device: %d\n", ret);
return 0;
}
static const struct dev_pm_ops rmi_i2c_pm = {
SYSTEM_SLEEP_PM_OPS(rmi_i2c_suspend, rmi_i2c_resume)
RUNTIME_PM_OPS(rmi_i2c_runtime_suspend, rmi_i2c_runtime_resume, NULL)
};
static const struct i2c_device_id rmi_id[] = {
{ "rmi4_i2c", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, rmi_id);
static struct i2c_driver rmi_i2c_driver = {
.driver = {
.name = "rmi4_i2c",
.pm = pm_ptr(&rmi_i2c_pm),
.of_match_table = of_match_ptr(rmi_i2c_of_match),
},
.id_table = rmi_id,
.probe = rmi_i2c_probe,
};
module_i2c_driver(rmi_i2c_driver);
MODULE_AUTHOR("Christopher Heiny <[email protected]>");
MODULE_AUTHOR("Andrew Duggan <[email protected]>");
MODULE_DESCRIPTION("RMI I2C driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/rmi4/rmi_i2c.c
|
// SPDX-License-Identifier: GPL-2.0
/*
* KUnit test for the input core.
*
* Copyright (c) 2023 Red Hat Inc
*/
#include <linux/delay.h>
#include <linux/input.h>
#include <kunit/test.h>
#define POLL_INTERVAL 100
static int input_test_init(struct kunit *test)
{
struct input_dev *input_dev;
int ret;
input_dev = input_allocate_device();
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, input_dev);
input_dev->name = "Test input device";
input_dev->id.bustype = BUS_VIRTUAL;
input_dev->id.vendor = 1;
input_dev->id.product = 1;
input_dev->id.version = 1;
input_set_capability(input_dev, EV_KEY, BTN_LEFT);
input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
ret = input_register_device(input_dev);
if (ret) {
input_free_device(input_dev);
KUNIT_ASSERT_FAILURE(test, "Register device failed: %d", ret);
}
test->priv = input_dev;
return 0;
}
static void input_test_exit(struct kunit *test)
{
struct input_dev *input_dev = test->priv;
if (input_dev)
input_unregister_device(input_dev);
}
static void input_test_poll(struct input_dev *input) { }
static void input_test_polling(struct kunit *test)
{
struct input_dev *input_dev = test->priv;
/* Must fail because a poll handler has not been set-up yet */
KUNIT_ASSERT_EQ(test, input_get_poll_interval(input_dev), -EINVAL);
KUNIT_ASSERT_EQ(test, input_setup_polling(input_dev, input_test_poll), 0);
input_set_poll_interval(input_dev, POLL_INTERVAL);
/* Must succeed because poll handler was set-up and poll interval set */
KUNIT_ASSERT_EQ(test, input_get_poll_interval(input_dev), POLL_INTERVAL);
}
static void input_test_timestamp(struct kunit *test)
{
const ktime_t invalid_timestamp = ktime_set(0, 0);
struct input_dev *input_dev = test->priv;
ktime_t *timestamp, time;
timestamp = input_get_timestamp(input_dev);
time = timestamp[INPUT_CLK_MONO];
/* The returned timestamp must always be valid */
KUNIT_ASSERT_EQ(test, ktime_compare(time, invalid_timestamp), 1);
time = ktime_get();
input_set_timestamp(input_dev, time);
timestamp = input_get_timestamp(input_dev);
/* The timestamp must be the same than set before */
KUNIT_ASSERT_EQ(test, ktime_compare(timestamp[INPUT_CLK_MONO], time), 0);
}
static void input_test_match_device_id(struct kunit *test)
{
struct input_dev *input_dev = test->priv;
struct input_device_id id = { 0 };
/*
* Must match when the input device bus, vendor, product, version
* and events capable of handling are the same and fail to match
* otherwise.
*/
id.flags = INPUT_DEVICE_ID_MATCH_BUS;
id.bustype = BUS_VIRTUAL;
KUNIT_ASSERT_TRUE(test, input_match_device_id(input_dev, &id));
id.bustype = BUS_I2C;
KUNIT_ASSERT_FALSE(test, input_match_device_id(input_dev, &id));
id.flags = INPUT_DEVICE_ID_MATCH_VENDOR;
id.vendor = 1;
KUNIT_ASSERT_TRUE(test, input_match_device_id(input_dev, &id));
id.vendor = 2;
KUNIT_ASSERT_FALSE(test, input_match_device_id(input_dev, &id));
id.flags = INPUT_DEVICE_ID_MATCH_PRODUCT;
id.product = 1;
KUNIT_ASSERT_TRUE(test, input_match_device_id(input_dev, &id));
id.product = 2;
KUNIT_ASSERT_FALSE(test, input_match_device_id(input_dev, &id));
id.flags = INPUT_DEVICE_ID_MATCH_VERSION;
id.version = 1;
KUNIT_ASSERT_TRUE(test, input_match_device_id(input_dev, &id));
id.version = 2;
KUNIT_ASSERT_FALSE(test, input_match_device_id(input_dev, &id));
id.flags = INPUT_DEVICE_ID_MATCH_EVBIT;
__set_bit(EV_KEY, id.evbit);
KUNIT_ASSERT_TRUE(test, input_match_device_id(input_dev, &id));
__set_bit(EV_ABS, id.evbit);
KUNIT_ASSERT_FALSE(test, input_match_device_id(input_dev, &id));
}
static void input_test_grab(struct kunit *test)
{
struct input_dev *input_dev = test->priv;
struct input_handle test_handle;
struct input_handler handler;
struct input_handle handle;
struct input_device_id id;
int res;
handler.name = "handler";
handler.id_table = &id;
handle.dev = input_get_device(input_dev);
handle.name = dev_name(&input_dev->dev);
handle.handler = &handler;
res = input_grab_device(&handle);
KUNIT_ASSERT_TRUE(test, res == 0);
test_handle.dev = input_get_device(input_dev);
test_handle.name = dev_name(&input_dev->dev);
test_handle.handler = &handler;
res = input_grab_device(&test_handle);
KUNIT_ASSERT_EQ(test, res, -EBUSY);
input_release_device(&handle);
input_put_device(input_dev);
res = input_grab_device(&test_handle);
KUNIT_ASSERT_TRUE(test, res == 0);
input_put_device(input_dev);
}
static struct kunit_case input_tests[] = {
KUNIT_CASE(input_test_polling),
KUNIT_CASE(input_test_timestamp),
KUNIT_CASE(input_test_match_device_id),
KUNIT_CASE(input_test_grab),
{ /* sentinel */ }
};
static struct kunit_suite input_test_suite = {
.name = "input_core",
.init = input_test_init,
.exit = input_test_exit,
.test_cases = input_tests,
};
kunit_test_suite(input_test_suite);
MODULE_AUTHOR("Javier Martinez Canillas <[email protected]>");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/tests/input_test.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Elan I2C/SMBus Touchpad driver - SMBus interface
*
* Copyright (c) 2013 ELAN Microelectronics Corp.
*
* Author: 林政維 (Duson Lin) <[email protected]>
*
* Based on cyapa driver:
* copyright (c) 2011-2012 Cypress Semiconductor, Inc.
* copyright (c) 2011-2012 Google, Inc.
*
* Trademarks are the property of their respective owners.
*/
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include "elan_i2c.h"
/* Elan SMbus commands */
#define ETP_SMBUS_IAP_CMD 0x00
#define ETP_SMBUS_ENABLE_TP 0x20
#define ETP_SMBUS_SLEEP_CMD 0x21
#define ETP_SMBUS_IAP_PASSWORD_WRITE 0x29
#define ETP_SMBUS_IAP_PASSWORD_READ 0x80
#define ETP_SMBUS_WRITE_FW_BLOCK 0x2A
#define ETP_SMBUS_IAP_RESET_CMD 0x2B
#define ETP_SMBUS_RANGE_CMD 0xA0
#define ETP_SMBUS_FW_VERSION_CMD 0xA1
#define ETP_SMBUS_XY_TRACENUM_CMD 0xA2
#define ETP_SMBUS_SM_VERSION_CMD 0xA3
#define ETP_SMBUS_UNIQUEID_CMD 0xA3
#define ETP_SMBUS_RESOLUTION_CMD 0xA4
#define ETP_SMBUS_HELLOPACKET_CMD 0xA7
#define ETP_SMBUS_PACKET_QUERY 0xA8
#define ETP_SMBUS_IAP_VERSION_CMD 0xAC
#define ETP_SMBUS_IAP_CTRL_CMD 0xAD
#define ETP_SMBUS_IAP_CHECKSUM_CMD 0xAE
#define ETP_SMBUS_FW_CHECKSUM_CMD 0xAF
#define ETP_SMBUS_MAX_BASELINE_CMD 0xC3
#define ETP_SMBUS_MIN_BASELINE_CMD 0xC4
#define ETP_SMBUS_CALIBRATE_QUERY 0xC5
#define ETP_SMBUS_REPORT_LEN 32
#define ETP_SMBUS_REPORT_LEN2 7
#define ETP_SMBUS_REPORT_OFFSET 2
#define ETP_SMBUS_HELLOPACKET_LEN 5
#define ETP_SMBUS_IAP_PASSWORD 0x1234
#define ETP_SMBUS_IAP_MODE_ON (1 << 6)
static int elan_smbus_initialize(struct i2c_client *client)
{
u8 check[ETP_SMBUS_HELLOPACKET_LEN] = { 0x55, 0x55, 0x55, 0x55, 0x55 };
u8 values[I2C_SMBUS_BLOCK_MAX] = {0};
int len, error;
/* Get hello packet */
len = i2c_smbus_read_block_data(client,
ETP_SMBUS_HELLOPACKET_CMD, values);
if (len != ETP_SMBUS_HELLOPACKET_LEN) {
dev_err(&client->dev, "hello packet length fail: %d\n", len);
error = len < 0 ? len : -EIO;
return error;
}
/* compare hello packet */
if (memcmp(values, check, ETP_SMBUS_HELLOPACKET_LEN)) {
dev_err(&client->dev, "hello packet fail [%*ph]\n",
ETP_SMBUS_HELLOPACKET_LEN, values);
return -ENXIO;
}
/* enable tp */
error = i2c_smbus_write_byte(client, ETP_SMBUS_ENABLE_TP);
if (error) {
dev_err(&client->dev, "failed to enable touchpad: %d\n", error);
return error;
}
return 0;
}
static int elan_smbus_set_mode(struct i2c_client *client, u8 mode)
{
u8 cmd[4] = { 0x00, 0x07, 0x00, mode };
return i2c_smbus_write_block_data(client, ETP_SMBUS_IAP_CMD,
sizeof(cmd), cmd);
}
static int elan_smbus_sleep_control(struct i2c_client *client, bool sleep)
{
if (sleep)
return i2c_smbus_write_byte(client, ETP_SMBUS_SLEEP_CMD);
else
return 0; /* XXX should we send ETP_SMBUS_ENABLE_TP here? */
}
static int elan_smbus_power_control(struct i2c_client *client, bool enable)
{
return 0; /* A no-op */
}
static int elan_smbus_calibrate(struct i2c_client *client)
{
u8 cmd[4] = { 0x00, 0x08, 0x00, 0x01 };
return i2c_smbus_write_block_data(client, ETP_SMBUS_IAP_CMD,
sizeof(cmd), cmd);
}
static int elan_smbus_calibrate_result(struct i2c_client *client, u8 *val)
{
int error;
u8 buf[I2C_SMBUS_BLOCK_MAX] = {0};
BUILD_BUG_ON(ETP_CALIBRATE_MAX_LEN > sizeof(buf));
error = i2c_smbus_read_block_data(client,
ETP_SMBUS_CALIBRATE_QUERY, buf);
if (error < 0)
return error;
memcpy(val, buf, ETP_CALIBRATE_MAX_LEN);
return 0;
}
static int elan_smbus_get_baseline_data(struct i2c_client *client,
bool max_baseline, u8 *value)
{
int error;
u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
error = i2c_smbus_read_block_data(client,
max_baseline ?
ETP_SMBUS_MAX_BASELINE_CMD :
ETP_SMBUS_MIN_BASELINE_CMD,
val);
if (error < 0)
return error;
*value = be16_to_cpup((__be16 *)val);
return 0;
}
static int elan_smbus_get_version(struct i2c_client *client,
u8 pattern, bool iap, u8 *version)
{
int error;
u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
error = i2c_smbus_read_block_data(client,
iap ? ETP_SMBUS_IAP_VERSION_CMD :
ETP_SMBUS_FW_VERSION_CMD,
val);
if (error < 0) {
dev_err(&client->dev, "failed to get %s version: %d\n",
iap ? "IAP" : "FW", error);
return error;
}
*version = val[2];
return 0;
}
static int elan_smbus_get_sm_version(struct i2c_client *client, u8 pattern,
u16 *ic_type, u8 *version, u8 *clickpad)
{
int error;
u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
error = i2c_smbus_read_block_data(client,
ETP_SMBUS_SM_VERSION_CMD, val);
if (error < 0) {
dev_err(&client->dev, "failed to get SM version: %d\n", error);
return error;
}
*version = val[0];
*ic_type = val[1];
*clickpad = val[0] & 0x10;
return 0;
}
static int elan_smbus_get_product_id(struct i2c_client *client, u16 *id)
{
int error;
u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
error = i2c_smbus_read_block_data(client,
ETP_SMBUS_UNIQUEID_CMD, val);
if (error < 0) {
dev_err(&client->dev, "failed to get product ID: %d\n", error);
return error;
}
*id = be16_to_cpup((__be16 *)val);
return 0;
}
static int elan_smbus_get_checksum(struct i2c_client *client,
bool iap, u16 *csum)
{
int error;
u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
error = i2c_smbus_read_block_data(client,
iap ? ETP_SMBUS_FW_CHECKSUM_CMD :
ETP_SMBUS_IAP_CHECKSUM_CMD,
val);
if (error < 0) {
dev_err(&client->dev, "failed to get %s checksum: %d\n",
iap ? "IAP" : "FW", error);
return error;
}
*csum = be16_to_cpup((__be16 *)val);
return 0;
}
static int elan_smbus_get_max(struct i2c_client *client,
unsigned int *max_x, unsigned int *max_y)
{
int ret;
int error;
u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
ret = i2c_smbus_read_block_data(client, ETP_SMBUS_RANGE_CMD, val);
if (ret != 3) {
error = ret < 0 ? ret : -EIO;
dev_err(&client->dev, "failed to get dimensions: %d\n", error);
return error;
}
*max_x = (0x0f & val[0]) << 8 | val[1];
*max_y = (0xf0 & val[0]) << 4 | val[2];
return 0;
}
static int elan_smbus_get_resolution(struct i2c_client *client,
u8 *hw_res_x, u8 *hw_res_y)
{
int ret;
int error;
u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
ret = i2c_smbus_read_block_data(client, ETP_SMBUS_RESOLUTION_CMD, val);
if (ret != 3) {
error = ret < 0 ? ret : -EIO;
dev_err(&client->dev, "failed to get resolution: %d\n", error);
return error;
}
*hw_res_x = val[1] & 0x0F;
*hw_res_y = (val[1] & 0xF0) >> 4;
return 0;
}
static int elan_smbus_get_num_traces(struct i2c_client *client,
unsigned int *x_traces,
unsigned int *y_traces)
{
int ret;
int error;
u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
ret = i2c_smbus_read_block_data(client, ETP_SMBUS_XY_TRACENUM_CMD, val);
if (ret != 3) {
error = ret < 0 ? ret : -EIO;
dev_err(&client->dev, "failed to get trace info: %d\n", error);
return error;
}
*x_traces = val[1];
*y_traces = val[2];
return 0;
}
static int elan_smbus_get_pressure_adjustment(struct i2c_client *client,
int *adjustment)
{
*adjustment = ETP_PRESSURE_OFFSET;
return 0;
}
static int elan_smbus_iap_get_mode(struct i2c_client *client,
enum tp_mode *mode)
{
int error;
u16 constant;
u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
error = i2c_smbus_read_block_data(client, ETP_SMBUS_IAP_CTRL_CMD, val);
if (error < 0) {
dev_err(&client->dev, "failed to read iap ctrol register: %d\n",
error);
return error;
}
constant = be16_to_cpup((__be16 *)val);
dev_dbg(&client->dev, "iap control reg: 0x%04x.\n", constant);
*mode = (constant & ETP_SMBUS_IAP_MODE_ON) ? IAP_MODE : MAIN_MODE;
return 0;
}
static int elan_smbus_iap_reset(struct i2c_client *client)
{
int error;
error = i2c_smbus_write_byte(client, ETP_SMBUS_IAP_RESET_CMD);
if (error) {
dev_err(&client->dev, "cannot reset IC: %d\n", error);
return error;
}
return 0;
}
static int elan_smbus_set_flash_key(struct i2c_client *client)
{
int error;
u8 cmd[4] = { 0x00, 0x0B, 0x00, 0x5A };
error = i2c_smbus_write_block_data(client, ETP_SMBUS_IAP_CMD,
sizeof(cmd), cmd);
if (error) {
dev_err(&client->dev, "cannot set flash key: %d\n", error);
return error;
}
return 0;
}
static int elan_smbus_prepare_fw_update(struct i2c_client *client, u16 ic_type,
u8 iap_version, u16 fw_page_size)
{
struct device *dev = &client->dev;
int len;
int error;
enum tp_mode mode;
u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
u8 cmd[4] = {0x0F, 0x78, 0x00, 0x06};
u16 password;
/* Get FW in which mode (IAP_MODE/MAIN_MODE) */
error = elan_smbus_iap_get_mode(client, &mode);
if (error)
return error;
if (mode == MAIN_MODE) {
/* set flash key */
error = elan_smbus_set_flash_key(client);
if (error)
return error;
/* write iap password */
if (i2c_smbus_write_byte(client,
ETP_SMBUS_IAP_PASSWORD_WRITE) < 0) {
dev_err(dev, "cannot write iap password\n");
return -EIO;
}
error = i2c_smbus_write_block_data(client, ETP_SMBUS_IAP_CMD,
sizeof(cmd), cmd);
if (error) {
dev_err(dev, "failed to write iap password: %d\n",
error);
return error;
}
/*
* Read back password to make sure we enabled flash
* successfully.
*/
len = i2c_smbus_read_block_data(client,
ETP_SMBUS_IAP_PASSWORD_READ,
val);
if (len < (int)sizeof(u16)) {
error = len < 0 ? len : -EIO;
dev_err(dev, "failed to read iap password: %d\n",
error);
return error;
}
password = be16_to_cpup((__be16 *)val);
if (password != ETP_SMBUS_IAP_PASSWORD) {
dev_err(dev, "wrong iap password = 0x%X\n", password);
return -EIO;
}
/* Wait 30ms for MAIN_MODE change to IAP_MODE */
msleep(30);
}
error = elan_smbus_set_flash_key(client);
if (error)
return error;
/* Reset IC */
error = elan_smbus_iap_reset(client);
if (error)
return error;
return 0;
}
static int elan_smbus_write_fw_block(struct i2c_client *client, u16 fw_page_size,
const u8 *page, u16 checksum, int idx)
{
struct device *dev = &client->dev;
int error;
u16 result;
u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
/*
* Due to the limitation of smbus protocol limiting
* transfer to 32 bytes at a time, we must split block
* in 2 transfers.
*/
error = i2c_smbus_write_block_data(client,
ETP_SMBUS_WRITE_FW_BLOCK,
fw_page_size / 2,
page);
if (error) {
dev_err(dev, "Failed to write page %d (part %d): %d\n",
idx, 1, error);
return error;
}
error = i2c_smbus_write_block_data(client,
ETP_SMBUS_WRITE_FW_BLOCK,
fw_page_size / 2,
page + fw_page_size / 2);
if (error) {
dev_err(dev, "Failed to write page %d (part %d): %d\n",
idx, 2, error);
return error;
}
/* Wait for F/W to update one page ROM data. */
usleep_range(8000, 10000);
error = i2c_smbus_read_block_data(client,
ETP_SMBUS_IAP_CTRL_CMD, val);
if (error < 0) {
dev_err(dev, "Failed to read IAP write result: %d\n",
error);
return error;
}
result = be16_to_cpup((__be16 *)val);
if (result & (ETP_FW_IAP_PAGE_ERR | ETP_FW_IAP_INTF_ERR)) {
dev_err(dev, "IAP reports failed write: %04hx\n",
result);
return -EIO;
}
return 0;
}
static int elan_smbus_get_report_features(struct i2c_client *client, u8 pattern,
unsigned int *features,
unsigned int *report_len)
{
/*
* SMBus controllers with pattern 2 lack area info, as newer
* high-precision packets use that space for coordinates.
*/
*features = pattern <= 0x01 ? ETP_FEATURE_REPORT_MK : 0;
*report_len = ETP_SMBUS_REPORT_LEN;
return 0;
}
static int elan_smbus_get_report(struct i2c_client *client,
u8 *report, unsigned int report_len)
{
int len;
BUILD_BUG_ON(I2C_SMBUS_BLOCK_MAX > ETP_SMBUS_REPORT_LEN);
len = i2c_smbus_read_block_data(client,
ETP_SMBUS_PACKET_QUERY,
&report[ETP_SMBUS_REPORT_OFFSET]);
if (len < 0) {
dev_err(&client->dev, "failed to read report data: %d\n", len);
return len;
}
if (report[ETP_REPORT_ID_OFFSET] == ETP_TP_REPORT_ID2)
report_len = ETP_SMBUS_REPORT_LEN2;
if (len != report_len) {
dev_err(&client->dev,
"wrong report length (%d vs %d expected)\n",
len, report_len);
return -EIO;
}
return 0;
}
static int elan_smbus_finish_fw_update(struct i2c_client *client,
struct completion *fw_completion)
{
/* No special handling unlike I2C transport */
return 0;
}
static int elan_smbus_get_pattern(struct i2c_client *client, u8 *pattern)
{
*pattern = 0;
return 0;
}
const struct elan_transport_ops elan_smbus_ops = {
.initialize = elan_smbus_initialize,
.sleep_control = elan_smbus_sleep_control,
.power_control = elan_smbus_power_control,
.set_mode = elan_smbus_set_mode,
.calibrate = elan_smbus_calibrate,
.calibrate_result = elan_smbus_calibrate_result,
.get_baseline_data = elan_smbus_get_baseline_data,
.get_version = elan_smbus_get_version,
.get_sm_version = elan_smbus_get_sm_version,
.get_product_id = elan_smbus_get_product_id,
.get_checksum = elan_smbus_get_checksum,
.get_pressure_adjustment = elan_smbus_get_pressure_adjustment,
.get_max = elan_smbus_get_max,
.get_resolution = elan_smbus_get_resolution,
.get_num_traces = elan_smbus_get_num_traces,
.iap_get_mode = elan_smbus_iap_get_mode,
.iap_reset = elan_smbus_iap_reset,
.prepare_fw_update = elan_smbus_prepare_fw_update,
.write_fw_block = elan_smbus_write_fw_block,
.finish_fw_update = elan_smbus_finish_fw_update,
.get_report_features = elan_smbus_get_report_features,
.get_report = elan_smbus_get_report,
.get_pattern = elan_smbus_get_pattern,
};
|
linux-master
|
drivers/input/mouse/elan_i2c_smbus.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Acorn RiscPC mouse driver for Linux/ARM
*
* Copyright (c) 2000-2002 Vojtech Pavlik
* Copyright (C) 1996-2002 Russell King
*/
/*
*
* This handles the Acorn RiscPCs mouse. We basically have a couple of
* hardware registers that track the sensor count for the X-Y movement and
* another register holding the button state. On every VSYNC interrupt we read
* the complete state and then work out if something has changed.
*/
#include <linux/module.h>
#include <linux/ptrace.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/hardware/iomd.h>
MODULE_AUTHOR("Vojtech Pavlik, Russell King");
MODULE_DESCRIPTION("Acorn RiscPC mouse driver");
MODULE_LICENSE("GPL");
static short rpcmouse_lastx, rpcmouse_lasty;
static struct input_dev *rpcmouse_dev;
static irqreturn_t rpcmouse_irq(int irq, void *dev_id)
{
struct input_dev *dev = dev_id;
short x, y, dx, dy, b;
x = (short) iomd_readl(IOMD_MOUSEX);
y = (short) iomd_readl(IOMD_MOUSEY);
b = (short) (__raw_readl(IOMEM(0xe0310000)) ^ 0x70);
dx = x - rpcmouse_lastx;
dy = y - rpcmouse_lasty;
rpcmouse_lastx = x;
rpcmouse_lasty = y;
input_report_rel(dev, REL_X, dx);
input_report_rel(dev, REL_Y, -dy);
input_report_key(dev, BTN_LEFT, b & 0x40);
input_report_key(dev, BTN_MIDDLE, b & 0x20);
input_report_key(dev, BTN_RIGHT, b & 0x10);
input_sync(dev);
return IRQ_HANDLED;
}
static int __init rpcmouse_init(void)
{
int err;
rpcmouse_dev = input_allocate_device();
if (!rpcmouse_dev)
return -ENOMEM;
rpcmouse_dev->name = "Acorn RiscPC Mouse";
rpcmouse_dev->phys = "rpcmouse/input0";
rpcmouse_dev->id.bustype = BUS_HOST;
rpcmouse_dev->id.vendor = 0x0005;
rpcmouse_dev->id.product = 0x0001;
rpcmouse_dev->id.version = 0x0100;
rpcmouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
rpcmouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
rpcmouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
rpcmouse_lastx = (short) iomd_readl(IOMD_MOUSEX);
rpcmouse_lasty = (short) iomd_readl(IOMD_MOUSEY);
if (request_irq(IRQ_VSYNCPULSE, rpcmouse_irq, IRQF_SHARED, "rpcmouse", rpcmouse_dev)) {
printk(KERN_ERR "rpcmouse: unable to allocate VSYNC interrupt\n");
err = -EBUSY;
goto err_free_dev;
}
err = input_register_device(rpcmouse_dev);
if (err)
goto err_free_irq;
return 0;
err_free_irq:
free_irq(IRQ_VSYNCPULSE, rpcmouse_dev);
err_free_dev:
input_free_device(rpcmouse_dev);
return err;
}
static void __exit rpcmouse_exit(void)
{
free_irq(IRQ_VSYNCPULSE, rpcmouse_dev);
input_unregister_device(rpcmouse_dev);
}
module_init(rpcmouse_init);
module_exit(rpcmouse_exit);
|
linux-master
|
drivers/input/mouse/rpcmouse.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* PS/2 mouse driver
*
* Copyright (c) 1999-2002 Vojtech Pavlik
* Copyright (c) 2003-2004 Dmitry Torokhov
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#define psmouse_fmt(fmt) fmt
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/init.h>
#include <linux/libps2.h>
#include <linux/mutex.h>
#include <linux/types.h>
#include "psmouse.h"
#include "synaptics.h"
#include "logips2pp.h"
#include "alps.h"
#include "hgpk.h"
#include "lifebook.h"
#include "trackpoint.h"
#include "touchkit_ps2.h"
#include "elantech.h"
#include "sentelic.h"
#include "cypress_ps2.h"
#include "focaltech.h"
#include "vmmouse.h"
#include "byd.h"
#define DRIVER_DESC "PS/2 mouse driver"
MODULE_AUTHOR("Vojtech Pavlik <[email protected]>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
static int psmouse_set_maxproto(const char *val, const struct kernel_param *);
static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp);
static const struct kernel_param_ops param_ops_proto_abbrev = {
.set = psmouse_set_maxproto,
.get = psmouse_get_maxproto,
};
#define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
static unsigned int psmouse_resolution = 200;
module_param_named(resolution, psmouse_resolution, uint, 0644);
MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
static unsigned int psmouse_rate = 100;
module_param_named(rate, psmouse_rate, uint, 0644);
MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
static bool psmouse_smartscroll = true;
module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
static bool psmouse_a4tech_2wheels;
module_param_named(a4tech_workaround, psmouse_a4tech_2wheels, bool, 0644);
MODULE_PARM_DESC(a4tech_workaround, "A4Tech second scroll wheel workaround, 1 = enabled, 0 = disabled (default).");
static unsigned int psmouse_resetafter = 5;
module_param_named(resetafter, psmouse_resetafter, uint, 0644);
MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
static unsigned int psmouse_resync_time;
module_param_named(resync_time, psmouse_resync_time, uint, 0644);
MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
NULL,
psmouse_attr_show_protocol, psmouse_attr_set_protocol);
PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
(void *) offsetof(struct psmouse, rate),
psmouse_show_int_attr, psmouse_attr_set_rate);
PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
(void *) offsetof(struct psmouse, resolution),
psmouse_show_int_attr, psmouse_attr_set_resolution);
PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
(void *) offsetof(struct psmouse, resetafter),
psmouse_show_int_attr, psmouse_set_int_attr);
PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
(void *) offsetof(struct psmouse, resync_time),
psmouse_show_int_attr, psmouse_set_int_attr);
static struct attribute *psmouse_dev_attrs[] = {
&psmouse_attr_protocol.dattr.attr,
&psmouse_attr_rate.dattr.attr,
&psmouse_attr_resolution.dattr.attr,
&psmouse_attr_resetafter.dattr.attr,
&psmouse_attr_resync_time.dattr.attr,
NULL
};
ATTRIBUTE_GROUPS(psmouse_dev);
/*
* psmouse_mutex protects all operations changing state of mouse
* (connecting, disconnecting, changing rate or resolution via
* sysfs). We could use a per-device semaphore but since there
* rarely more than one PS/2 mouse connected and since semaphore
* is taken in "slow" paths it is not worth it.
*/
static DEFINE_MUTEX(psmouse_mutex);
static struct workqueue_struct *kpsmoused_wq;
struct psmouse *psmouse_from_serio(struct serio *serio)
{
struct ps2dev *ps2dev = serio_get_drvdata(serio);
return container_of(ps2dev, struct psmouse, ps2dev);
}
void psmouse_report_standard_buttons(struct input_dev *dev, u8 buttons)
{
input_report_key(dev, BTN_LEFT, buttons & BIT(0));
input_report_key(dev, BTN_MIDDLE, buttons & BIT(2));
input_report_key(dev, BTN_RIGHT, buttons & BIT(1));
}
void psmouse_report_standard_motion(struct input_dev *dev, u8 *packet)
{
int x, y;
x = packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0;
y = packet[2] ? packet[2] - ((packet[0] << 3) & 0x100) : 0;
input_report_rel(dev, REL_X, x);
input_report_rel(dev, REL_Y, -y);
}
void psmouse_report_standard_packet(struct input_dev *dev, u8 *packet)
{
psmouse_report_standard_buttons(dev, packet[0]);
psmouse_report_standard_motion(dev, packet);
}
/*
* psmouse_process_byte() analyzes the PS/2 data stream and reports
* relevant events to the input module once full packet has arrived.
*/
psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
u8 *packet = psmouse->packet;
int wheel;
if (psmouse->pktcnt < psmouse->pktsize)
return PSMOUSE_GOOD_DATA;
/* Full packet accumulated, process it */
switch (psmouse->protocol->type) {
case PSMOUSE_IMPS:
/* IntelliMouse has scroll wheel */
input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
break;
case PSMOUSE_IMEX:
/* Scroll wheel and buttons on IntelliMouse Explorer */
switch (packet[3] & 0xC0) {
case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
input_report_rel(dev, REL_WHEEL,
-sign_extend32(packet[3], 5));
break;
case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
input_report_rel(dev, REL_HWHEEL,
-sign_extend32(packet[3], 5));
break;
case 0x00:
case 0xC0:
wheel = sign_extend32(packet[3], 3);
/*
* Some A4Tech mice have two scroll wheels, with first
* one reporting +/-1 in the lower nibble, and second
* one reporting +/-2.
*/
if (psmouse_a4tech_2wheels && abs(wheel) > 1)
input_report_rel(dev, REL_HWHEEL, wheel / 2);
else
input_report_rel(dev, REL_WHEEL, -wheel);
input_report_key(dev, BTN_SIDE, packet[3] & BIT(4));
input_report_key(dev, BTN_EXTRA, packet[3] & BIT(5));
break;
}
break;
case PSMOUSE_GENPS:
/* Report scroll buttons on NetMice */
input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
/* Extra buttons on Genius NewNet 3D */
input_report_key(dev, BTN_SIDE, packet[0] & BIT(6));
input_report_key(dev, BTN_EXTRA, packet[0] & BIT(7));
break;
case PSMOUSE_THINKPS:
/* Extra button on ThinkingMouse */
input_report_key(dev, BTN_EXTRA, packet[0] & BIT(3));
/*
* Without this bit of weirdness moving up gives wildly
* high Y changes.
*/
packet[1] |= (packet[0] & 0x40) << 1;
break;
case PSMOUSE_CORTRON:
/*
* Cortron PS2 Trackball reports SIDE button in the
* 4th bit of the first byte.
*/
input_report_key(dev, BTN_SIDE, packet[0] & BIT(3));
packet[0] |= BIT(3);
break;
default:
break;
}
/* Generic PS/2 Mouse */
packet[0] |= psmouse->extra_buttons;
psmouse_report_standard_packet(dev, packet);
input_sync(dev);
return PSMOUSE_FULL_PACKET;
}
void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
unsigned long delay)
{
queue_delayed_work(kpsmoused_wq, work, delay);
}
/*
* __psmouse_set_state() sets new psmouse state and resets all flags.
*/
static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
{
psmouse->state = new_state;
psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
psmouse->ps2dev.flags = 0;
psmouse->last = jiffies;
}
/*
* psmouse_set_state() sets new psmouse state and resets all flags and
* counters while holding serio lock so fighting with interrupt handler
* is not a concern.
*/
void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
{
serio_pause_rx(psmouse->ps2dev.serio);
__psmouse_set_state(psmouse, new_state);
serio_continue_rx(psmouse->ps2dev.serio);
}
/*
* psmouse_handle_byte() processes one byte of the input data stream
* by calling corresponding protocol handler.
*/
static int psmouse_handle_byte(struct psmouse *psmouse)
{
psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
switch (rc) {
case PSMOUSE_BAD_DATA:
if (psmouse->state == PSMOUSE_ACTIVATED) {
psmouse_warn(psmouse,
"%s at %s lost sync at byte %d\n",
psmouse->name, psmouse->phys,
psmouse->pktcnt);
if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
__psmouse_set_state(psmouse, PSMOUSE_IGNORE);
psmouse_notice(psmouse,
"issuing reconnect request\n");
serio_reconnect(psmouse->ps2dev.serio);
return -EIO;
}
}
psmouse->pktcnt = 0;
break;
case PSMOUSE_FULL_PACKET:
psmouse->pktcnt = 0;
if (psmouse->out_of_sync_cnt) {
psmouse->out_of_sync_cnt = 0;
psmouse_notice(psmouse,
"%s at %s - driver resynced.\n",
psmouse->name, psmouse->phys);
}
break;
case PSMOUSE_GOOD_DATA:
break;
}
return 0;
}
static void psmouse_handle_oob_data(struct psmouse *psmouse, u8 data)
{
switch (psmouse->oob_data_type) {
case PSMOUSE_OOB_NONE:
psmouse->oob_data_type = data;
break;
case PSMOUSE_OOB_EXTRA_BTNS:
psmouse_report_standard_buttons(psmouse->dev, data);
input_sync(psmouse->dev);
psmouse->extra_buttons = data;
psmouse->oob_data_type = PSMOUSE_OOB_NONE;
break;
default:
psmouse_warn(psmouse,
"unknown OOB_DATA type: 0x%02x\n",
psmouse->oob_data_type);
psmouse->oob_data_type = PSMOUSE_OOB_NONE;
break;
}
}
static enum ps2_disposition psmouse_pre_receive_byte(struct ps2dev *ps2dev,
u8 data,
unsigned int flags)
{
struct psmouse *psmouse = container_of(ps2dev, struct psmouse, ps2dev);
if (psmouse->state == PSMOUSE_IGNORE)
return PS2_IGNORE;
if (unlikely((flags & SERIO_TIMEOUT) ||
((flags & SERIO_PARITY) &&
!psmouse->protocol->ignore_parity))) {
if (psmouse->state == PSMOUSE_ACTIVATED)
psmouse_warn(psmouse,
"bad data from KBC -%s%s\n",
flags & SERIO_TIMEOUT ? " timeout" : "",
flags & SERIO_PARITY ? " bad parity" : "");
return PS2_ERROR;
}
if (flags & SERIO_OOB_DATA) {
psmouse_handle_oob_data(psmouse, data);
return PS2_IGNORE;
}
return PS2_PROCESS;
}
static void psmouse_receive_byte(struct ps2dev *ps2dev, u8 data)
{
struct psmouse *psmouse = container_of(ps2dev, struct psmouse, ps2dev);
pm_wakeup_event(&ps2dev->serio->dev, 0);
if (psmouse->state <= PSMOUSE_RESYNCING)
return;
if (psmouse->state == PSMOUSE_ACTIVATED &&
psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n",
psmouse->name, psmouse->phys, psmouse->pktcnt);
psmouse->badbyte = psmouse->packet[0];
__psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
return;
}
psmouse->packet[psmouse->pktcnt++] = data;
/* Check if this is a new device announcement (0xAA 0x00) */
if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
if (psmouse->pktcnt == 1) {
psmouse->last = jiffies;
return;
}
if (psmouse->packet[1] == PSMOUSE_RET_ID ||
(psmouse->protocol->type == PSMOUSE_HGPK &&
psmouse->packet[1] == PSMOUSE_RET_BAT)) {
__psmouse_set_state(psmouse, PSMOUSE_IGNORE);
serio_reconnect(ps2dev->serio);
return;
}
/* Not a new device, try processing first byte normally */
psmouse->pktcnt = 1;
if (psmouse_handle_byte(psmouse))
return;
psmouse->packet[psmouse->pktcnt++] = data;
}
/*
* See if we need to force resync because mouse was idle for
* too long.
*/
if (psmouse->state == PSMOUSE_ACTIVATED &&
psmouse->pktcnt == 1 && psmouse->resync_time &&
time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
psmouse->badbyte = psmouse->packet[0];
__psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
return;
}
psmouse->last = jiffies;
psmouse_handle_byte(psmouse);
}
/*
* psmouse_reset() resets the mouse into power-on state.
*/
int psmouse_reset(struct psmouse *psmouse)
{
u8 param[2];
int error;
error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT);
if (error)
return error;
if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
return -EIO;
return 0;
}
/*
* Here we set the mouse resolution.
*/
void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
{
static const u8 params[] = { 0, 1, 2, 2, 3 };
u8 p;
if (resolution == 0 || resolution > 200)
resolution = 200;
p = params[resolution / 50];
ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
psmouse->resolution = 25 << p;
}
/*
* Here we set the mouse report rate.
*/
static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
{
static const u8 rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
u8 r;
int i = 0;
while (rates[i] > rate)
i++;
r = rates[i];
ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
psmouse->rate = r;
}
/*
* Here we set the mouse scaling.
*/
static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale)
{
ps2_command(&psmouse->ps2dev, NULL,
scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 :
PSMOUSE_CMD_SETSCALE11);
}
/*
* psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
*/
static int psmouse_poll(struct psmouse *psmouse)
{
return ps2_command(&psmouse->ps2dev, psmouse->packet,
PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
}
static bool psmouse_check_pnp_id(const char *id, const char * const ids[])
{
int i;
for (i = 0; ids[i]; i++)
if (!strcasecmp(id, ids[i]))
return true;
return false;
}
/*
* psmouse_matches_pnp_id - check if psmouse matches one of the passed in ids.
*/
bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[])
{
struct serio *serio = psmouse->ps2dev.serio;
char *p, *fw_id_copy, *save_ptr;
bool found = false;
if (strncmp(serio->firmware_id, "PNP: ", 5))
return false;
fw_id_copy = kstrndup(&serio->firmware_id[5],
sizeof(serio->firmware_id) - 5,
GFP_KERNEL);
if (!fw_id_copy)
return false;
save_ptr = fw_id_copy;
while ((p = strsep(&fw_id_copy, " ")) != NULL) {
if (psmouse_check_pnp_id(p, ids)) {
found = true;
break;
}
}
kfree(save_ptr);
return found;
}
/*
* Genius NetMouse magic init.
*/
static int genius_detect(struct psmouse *psmouse, bool set_properties)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param[4];
param[0] = 3;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
return -ENODEV;
if (set_properties) {
__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
__set_bit(BTN_EXTRA, psmouse->dev->keybit);
__set_bit(BTN_SIDE, psmouse->dev->keybit);
__set_bit(REL_WHEEL, psmouse->dev->relbit);
psmouse->vendor = "Genius";
psmouse->name = "Mouse";
psmouse->pktsize = 4;
}
return 0;
}
/*
* IntelliMouse magic init.
*/
static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param[2];
param[0] = 200;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 100;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 80;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
if (param[0] != 3)
return -ENODEV;
if (set_properties) {
__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
__set_bit(REL_WHEEL, psmouse->dev->relbit);
if (!psmouse->vendor)
psmouse->vendor = "Generic";
if (!psmouse->name)
psmouse->name = "Wheel Mouse";
psmouse->pktsize = 4;
}
return 0;
}
/*
* Try IntelliMouse/Explorer magic init.
*/
static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param[2];
intellimouse_detect(psmouse, 0);
param[0] = 200;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 200;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 80;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
if (param[0] != 4)
return -ENODEV;
/* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
param[0] = 200;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 80;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 40;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
if (set_properties) {
__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
__set_bit(REL_WHEEL, psmouse->dev->relbit);
__set_bit(REL_HWHEEL, psmouse->dev->relbit);
__set_bit(BTN_SIDE, psmouse->dev->keybit);
__set_bit(BTN_EXTRA, psmouse->dev->keybit);
if (!psmouse->vendor)
psmouse->vendor = "Generic";
if (!psmouse->name)
psmouse->name = "Explorer Mouse";
psmouse->pktsize = 4;
}
return 0;
}
/*
* Kensington ThinkingMouse / ExpertMouse magic init.
*/
static int thinking_detect(struct psmouse *psmouse, bool set_properties)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param[2];
static const u8 seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
int i;
param[0] = 10;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 0;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
for (i = 0; i < ARRAY_SIZE(seq); i++) {
param[0] = seq[i];
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
}
ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
if (param[0] != 2)
return -ENODEV;
if (set_properties) {
__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
__set_bit(BTN_EXTRA, psmouse->dev->keybit);
psmouse->vendor = "Kensington";
psmouse->name = "ThinkingMouse";
}
return 0;
}
/*
* Bare PS/2 protocol "detection". Always succeeds.
*/
static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
{
if (set_properties) {
if (!psmouse->vendor)
psmouse->vendor = "Generic";
if (!psmouse->name)
psmouse->name = "Mouse";
/*
* We have no way of figuring true number of buttons so let's
* assume that the device has 3.
*/
input_set_capability(psmouse->dev, EV_KEY, BTN_MIDDLE);
}
return 0;
}
/*
* Cortron PS/2 protocol detection. There's no special way to detect it, so it
* must be forced by sysfs protocol writing.
*/
static int cortron_detect(struct psmouse *psmouse, bool set_properties)
{
if (set_properties) {
psmouse->vendor = "Cortron";
psmouse->name = "PS/2 Trackball";
__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
__set_bit(BTN_SIDE, psmouse->dev->keybit);
}
return 0;
}
static const struct psmouse_protocol psmouse_protocols[] = {
{
.type = PSMOUSE_PS2,
.name = "PS/2",
.alias = "bare",
.maxproto = true,
.ignore_parity = true,
.detect = ps2bare_detect,
.try_passthru = true,
},
#ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
{
.type = PSMOUSE_PS2PP,
.name = "PS2++",
.alias = "logitech",
.detect = ps2pp_detect,
},
#endif
{
.type = PSMOUSE_THINKPS,
.name = "ThinkPS/2",
.alias = "thinkps",
.detect = thinking_detect,
},
#ifdef CONFIG_MOUSE_PS2_CYPRESS
{
.type = PSMOUSE_CYPRESS,
.name = "CyPS/2",
.alias = "cypress",
.detect = cypress_detect,
.init = cypress_init,
},
#endif
{
.type = PSMOUSE_GENPS,
.name = "GenPS/2",
.alias = "genius",
.detect = genius_detect,
},
{
.type = PSMOUSE_IMPS,
.name = "ImPS/2",
.alias = "imps",
.maxproto = true,
.ignore_parity = true,
.detect = intellimouse_detect,
.try_passthru = true,
},
{
.type = PSMOUSE_IMEX,
.name = "ImExPS/2",
.alias = "exps",
.maxproto = true,
.ignore_parity = true,
.detect = im_explorer_detect,
.try_passthru = true,
},
#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
{
.type = PSMOUSE_SYNAPTICS,
.name = "SynPS/2",
.alias = "synaptics",
.detect = synaptics_detect,
.init = synaptics_init_absolute,
},
{
.type = PSMOUSE_SYNAPTICS_RELATIVE,
.name = "SynRelPS/2",
.alias = "synaptics-relative",
.detect = synaptics_detect,
.init = synaptics_init_relative,
},
#endif
#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
{
.type = PSMOUSE_SYNAPTICS_SMBUS,
.name = "SynSMBus",
.alias = "synaptics-smbus",
.detect = synaptics_detect,
.init = synaptics_init_smbus,
.smbus_companion = true,
},
#endif
#ifdef CONFIG_MOUSE_PS2_ALPS
{
.type = PSMOUSE_ALPS,
.name = "AlpsPS/2",
.alias = "alps",
.detect = alps_detect,
.init = alps_init,
},
#endif
#ifdef CONFIG_MOUSE_PS2_LIFEBOOK
{
.type = PSMOUSE_LIFEBOOK,
.name = "LBPS/2",
.alias = "lifebook",
.detect = lifebook_detect,
.init = lifebook_init,
},
#endif
#ifdef CONFIG_MOUSE_PS2_TRACKPOINT
{
.type = PSMOUSE_TRACKPOINT,
.name = "TPPS/2",
.alias = "trackpoint",
.detect = trackpoint_detect,
.try_passthru = true,
},
#endif
#ifdef CONFIG_MOUSE_PS2_TOUCHKIT
{
.type = PSMOUSE_TOUCHKIT_PS2,
.name = "touchkitPS/2",
.alias = "touchkit",
.detect = touchkit_ps2_detect,
},
#endif
#ifdef CONFIG_MOUSE_PS2_OLPC
{
.type = PSMOUSE_HGPK,
.name = "OLPC HGPK",
.alias = "hgpk",
.detect = hgpk_detect,
},
#endif
#ifdef CONFIG_MOUSE_PS2_ELANTECH
{
.type = PSMOUSE_ELANTECH,
.name = "ETPS/2",
.alias = "elantech",
.detect = elantech_detect,
.init = elantech_init_ps2,
},
#endif
#ifdef CONFIG_MOUSE_PS2_ELANTECH_SMBUS
{
.type = PSMOUSE_ELANTECH_SMBUS,
.name = "ETSMBus",
.alias = "elantech-smbus",
.detect = elantech_detect,
.init = elantech_init_smbus,
.smbus_companion = true,
},
#endif
#ifdef CONFIG_MOUSE_PS2_SENTELIC
{
.type = PSMOUSE_FSP,
.name = "FSPPS/2",
.alias = "fsp",
.detect = fsp_detect,
.init = fsp_init,
},
#endif
{
.type = PSMOUSE_CORTRON,
.name = "CortronPS/2",
.alias = "cortps",
.detect = cortron_detect,
},
#ifdef CONFIG_MOUSE_PS2_FOCALTECH
{
.type = PSMOUSE_FOCALTECH,
.name = "FocalTechPS/2",
.alias = "focaltech",
.detect = focaltech_detect,
.init = focaltech_init,
},
#endif
#ifdef CONFIG_MOUSE_PS2_VMMOUSE
{
.type = PSMOUSE_VMMOUSE,
.name = VMMOUSE_PSNAME,
.alias = "vmmouse",
.detect = vmmouse_detect,
.init = vmmouse_init,
},
#endif
#ifdef CONFIG_MOUSE_PS2_BYD
{
.type = PSMOUSE_BYD,
.name = "BYDPS/2",
.alias = "byd",
.detect = byd_detect,
.init = byd_init,
},
#endif
{
.type = PSMOUSE_AUTO,
.name = "auto",
.alias = "any",
.maxproto = true,
},
};
static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type)
{
int i;
for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
if (psmouse_protocols[i].type == type)
return &psmouse_protocols[i];
return NULL;
}
static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
{
const struct psmouse_protocol *proto;
proto = __psmouse_protocol_by_type(type);
if (proto)
return proto;
WARN_ON(1);
return &psmouse_protocols[0];
}
static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
{
const struct psmouse_protocol *p;
int i;
for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
p = &psmouse_protocols[i];
if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
(strlen(p->alias) == len && !strncmp(p->alias, name, len)))
return &psmouse_protocols[i];
}
return NULL;
}
/*
* Apply default settings to the psmouse structure. Most of them will
* be overridden by individual protocol initialization routines.
*/
static void psmouse_apply_defaults(struct psmouse *psmouse)
{
struct input_dev *input_dev = psmouse->dev;
bitmap_zero(input_dev->evbit, EV_CNT);
bitmap_zero(input_dev->keybit, KEY_CNT);
bitmap_zero(input_dev->relbit, REL_CNT);
bitmap_zero(input_dev->absbit, ABS_CNT);
bitmap_zero(input_dev->mscbit, MSC_CNT);
input_set_capability(input_dev, EV_KEY, BTN_LEFT);
input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
input_set_capability(input_dev, EV_REL, REL_X);
input_set_capability(input_dev, EV_REL, REL_Y);
__set_bit(INPUT_PROP_POINTER, input_dev->propbit);
psmouse->protocol = &psmouse_protocols[0];
psmouse->set_rate = psmouse_set_rate;
psmouse->set_resolution = psmouse_set_resolution;
psmouse->set_scale = psmouse_set_scale;
psmouse->poll = psmouse_poll;
psmouse->protocol_handler = psmouse_process_byte;
psmouse->pktsize = 3;
psmouse->reconnect = NULL;
psmouse->fast_reconnect = NULL;
psmouse->disconnect = NULL;
psmouse->cleanup = NULL;
psmouse->pt_activate = NULL;
psmouse->pt_deactivate = NULL;
}
static bool psmouse_do_detect(int (*detect)(struct psmouse *, bool),
struct psmouse *psmouse, bool allow_passthrough,
bool set_properties)
{
if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU &&
!allow_passthrough) {
return false;
}
if (set_properties)
psmouse_apply_defaults(psmouse);
return detect(psmouse, set_properties) == 0;
}
static bool psmouse_try_protocol(struct psmouse *psmouse,
enum psmouse_type type,
unsigned int *max_proto,
bool set_properties, bool init_allowed)
{
const struct psmouse_protocol *proto;
proto = __psmouse_protocol_by_type(type);
if (!proto)
return false;
if (!psmouse_do_detect(proto->detect, psmouse, proto->try_passthru,
set_properties))
return false;
if (set_properties && proto->init && init_allowed) {
if (proto->init(psmouse) != 0) {
/*
* We detected device, but init failed. Adjust
* max_proto so we only try standard protocols.
*/
if (*max_proto > PSMOUSE_IMEX)
*max_proto = PSMOUSE_IMEX;
return false;
}
}
return true;
}
/*
* psmouse_extensions() probes for any extensions to the basic PS/2 protocol
* the mouse may have.
*/
static int psmouse_extensions(struct psmouse *psmouse,
unsigned int max_proto, bool set_properties)
{
bool synaptics_hardware = false;
int ret;
/*
* Always check for focaltech, this is safe as it uses pnp-id
* matching.
*/
if (psmouse_do_detect(focaltech_detect,
psmouse, false, set_properties)) {
if (max_proto > PSMOUSE_IMEX &&
IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) &&
(!set_properties || focaltech_init(psmouse) == 0)) {
return PSMOUSE_FOCALTECH;
}
/*
* Restrict psmouse_max_proto so that psmouse_initialize()
* does not try to reset rate and resolution, because even
* that upsets the device.
* This also causes us to basically fall through to basic
* protocol detection, where we fully reset the mouse,
* and set it up as bare PS/2 protocol device.
*/
psmouse_max_proto = max_proto = PSMOUSE_PS2;
}
/*
* We always check for LifeBook because it does not disturb mouse
* (it only checks DMI information).
*/
if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto,
set_properties, max_proto > PSMOUSE_IMEX))
return PSMOUSE_LIFEBOOK;
if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto,
set_properties, max_proto > PSMOUSE_IMEX))
return PSMOUSE_VMMOUSE;
/*
* Try Kensington ThinkingMouse (we try first, because Synaptics
* probe upsets the ThinkingMouse).
*/
if (max_proto > PSMOUSE_IMEX &&
psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto,
set_properties, true)) {
return PSMOUSE_THINKPS;
}
/*
* Try Synaptics TouchPad. Note that probing is done even if
* Synaptics protocol support is disabled in config - we need to
* know if it is Synaptics so we can reset it properly after
* probing for IntelliMouse.
*/
if (max_proto > PSMOUSE_PS2 &&
psmouse_do_detect(synaptics_detect,
psmouse, false, set_properties)) {
synaptics_hardware = true;
if (max_proto > PSMOUSE_IMEX) {
/*
* Try activating protocol, but check if support is
* enabled first, since we try detecting Synaptics
* even when protocol is disabled.
*/
if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) ||
IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) {
if (!set_properties)
return PSMOUSE_SYNAPTICS;
ret = synaptics_init(psmouse);
if (ret >= 0)
return ret;
}
/*
* Some Synaptics touchpads can emulate extended
* protocols (like IMPS/2). Unfortunately
* Logitech/Genius probes confuse some firmware
* versions so we'll have to skip them.
*/
max_proto = PSMOUSE_IMEX;
}
/*
* Make sure that touchpad is in relative mode, gestures
* (taps) are enabled.
*/
synaptics_reset(psmouse);
}
/*
* Try Cypress Trackpad. We must try it before Finger Sensing Pad
* because Finger Sensing Pad probe upsets some modules of Cypress
* Trackpads.
*/
if (max_proto > PSMOUSE_IMEX &&
psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto,
set_properties, true)) {
return PSMOUSE_CYPRESS;
}
/* Try ALPS TouchPad */
if (max_proto > PSMOUSE_IMEX) {
ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS,
&max_proto, set_properties, true))
return PSMOUSE_ALPS;
}
/* Try OLPC HGPK touchpad */
if (max_proto > PSMOUSE_IMEX &&
psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto,
set_properties, true)) {
return PSMOUSE_HGPK;
}
/* Try Elantech touchpad */
if (max_proto > PSMOUSE_IMEX &&
psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH,
&max_proto, set_properties, false)) {
if (!set_properties)
return PSMOUSE_ELANTECH;
ret = elantech_init(psmouse);
if (ret >= 0)
return ret;
}
if (max_proto > PSMOUSE_IMEX) {
if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS,
&max_proto, set_properties, true))
return PSMOUSE_GENPS;
if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP,
&max_proto, set_properties, true))
return PSMOUSE_PS2PP;
if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT,
&max_proto, set_properties, true))
return PSMOUSE_TRACKPOINT;
if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2,
&max_proto, set_properties, true))
return PSMOUSE_TOUCHKIT_PS2;
}
/*
* Try Finger Sensing Pad. We do it here because its probe upsets
* Trackpoint devices (causing TP_READ_ID command to time out).
*/
if (max_proto > PSMOUSE_IMEX &&
psmouse_try_protocol(psmouse, PSMOUSE_FSP,
&max_proto, set_properties, true)) {
return PSMOUSE_FSP;
}
/*
* Reset to defaults in case the device got confused by extended
* protocol probes. Note that we follow up with full reset because
* some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
*/
ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
psmouse_reset(psmouse);
if (max_proto >= PSMOUSE_IMEX &&
psmouse_try_protocol(psmouse, PSMOUSE_IMEX,
&max_proto, set_properties, true)) {
return PSMOUSE_IMEX;
}
if (max_proto >= PSMOUSE_IMPS &&
psmouse_try_protocol(psmouse, PSMOUSE_IMPS,
&max_proto, set_properties, true)) {
return PSMOUSE_IMPS;
}
/*
* Okay, all failed, we have a standard mouse here. The number of
* the buttons is still a question, though. We assume 3.
*/
psmouse_try_protocol(psmouse, PSMOUSE_PS2,
&max_proto, set_properties, true);
if (synaptics_hardware) {
/*
* We detected Synaptics hardware but it did not respond to
* IMPS/2 probes. We need to reset the touchpad because if
* there is a track point on the pass through port it could
* get disabled while probing for protocol extensions.
*/
psmouse_reset(psmouse);
}
return PSMOUSE_PS2;
}
/*
* psmouse_probe() probes for a PS/2 mouse.
*/
static int psmouse_probe(struct psmouse *psmouse)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param[2];
int error;
/*
* First, we check if it's a mouse. It should send 0x00 or 0x03 in
* case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
* Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and
* subsequent ID queries, probably due to a firmware bug.
*/
param[0] = 0xa5;
error = ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
if (error)
return error;
if (param[0] != 0x00 && param[0] != 0x03 &&
param[0] != 0x04 && param[0] != 0xff)
return -ENODEV;
/*
* Then we reset and disable the mouse so that it doesn't generate
* events.
*/
error = ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
if (error)
psmouse_warn(psmouse, "Failed to reset mouse on %s: %d\n",
ps2dev->serio->phys, error);
return 0;
}
/*
* psmouse_initialize() initializes the mouse to a sane state.
*/
static void psmouse_initialize(struct psmouse *psmouse)
{
/*
* We set the mouse report rate, resolution and scaling.
*/
if (psmouse_max_proto != PSMOUSE_PS2) {
psmouse->set_rate(psmouse, psmouse->rate);
psmouse->set_resolution(psmouse, psmouse->resolution);
psmouse->set_scale(psmouse, PSMOUSE_SCALE11);
}
}
/*
* psmouse_activate() enables the mouse so that we get motion reports from it.
*/
int psmouse_activate(struct psmouse *psmouse)
{
if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
psmouse->ps2dev.serio->phys);
return -1;
}
psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
return 0;
}
/*
* psmouse_deactivate() puts the mouse into poll mode so that we don't get
* motion reports from it unless we explicitly request it.
*/
int psmouse_deactivate(struct psmouse *psmouse)
{
int error;
error = ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE);
if (error) {
psmouse_warn(psmouse, "Failed to deactivate mouse on %s: %d\n",
psmouse->ps2dev.serio->phys, error);
return error;
}
psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
return 0;
}
/*
* psmouse_resync() attempts to re-validate current protocol.
*/
static void psmouse_resync(struct work_struct *work)
{
struct psmouse *parent = NULL, *psmouse =
container_of(work, struct psmouse, resync_work.work);
struct serio *serio = psmouse->ps2dev.serio;
psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
bool failed = false, enabled = false;
int i;
mutex_lock(&psmouse_mutex);
if (psmouse->state != PSMOUSE_RESYNCING)
goto out;
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
parent = psmouse_from_serio(serio->parent);
psmouse_deactivate(parent);
}
/*
* Some mice don't ACK commands sent while they are in the middle of
* transmitting motion packet. To avoid delay we use ps2_sendbyte()
* instead of ps2_command() which would wait for 200ms for an ACK
* that may never come.
* As an additional quirk ALPS touchpads may not only forget to ACK
* disable command but will stop reporting taps, so if we see that
* mouse at least once ACKs disable we will do full reconnect if ACK
* is missing.
*/
psmouse->num_resyncs++;
if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
failed = true;
} else
psmouse->acks_disable_command = true;
/*
* Poll the mouse. If it was reset the packet will be shorter than
* psmouse->pktsize and ps2_command will fail. We do not expect and
* do not handle scenario when mouse "upgrades" its protocol while
* disconnected since it would require additional delay. If we ever
* see a mouse that does it we'll adjust the code.
*/
if (!failed) {
if (psmouse->poll(psmouse))
failed = true;
else {
psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
for (i = 0; i < psmouse->pktsize; i++) {
psmouse->pktcnt++;
rc = psmouse->protocol_handler(psmouse);
if (rc != PSMOUSE_GOOD_DATA)
break;
}
if (rc != PSMOUSE_FULL_PACKET)
failed = true;
psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
}
}
/*
* Now try to enable mouse. We try to do that even if poll failed
* and also repeat our attempts 5 times, otherwise we may be left
* out with disabled mouse.
*/
for (i = 0; i < 5; i++) {
if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
enabled = true;
break;
}
msleep(200);
}
if (!enabled) {
psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
psmouse->ps2dev.serio->phys);
failed = true;
}
if (failed) {
psmouse_set_state(psmouse, PSMOUSE_IGNORE);
psmouse_info(psmouse,
"resync failed, issuing reconnect request\n");
serio_reconnect(serio);
} else
psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
if (parent)
psmouse_activate(parent);
out:
mutex_unlock(&psmouse_mutex);
}
/*
* psmouse_cleanup() resets the mouse into power-on state.
*/
static void psmouse_cleanup(struct serio *serio)
{
struct psmouse *psmouse = psmouse_from_serio(serio);
struct psmouse *parent = NULL;
mutex_lock(&psmouse_mutex);
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
parent = psmouse_from_serio(serio->parent);
psmouse_deactivate(parent);
}
psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
/*
* Disable stream mode so cleanup routine can proceed undisturbed.
*/
if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
psmouse->ps2dev.serio->phys);
if (psmouse->cleanup)
psmouse->cleanup(psmouse);
/*
* Reset the mouse to defaults (bare PS/2 protocol).
*/
ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
/*
* Some boxes, such as HP nx7400, get terribly confused if mouse
* is not fully enabled before suspending/shutting down.
*/
ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
if (parent) {
if (parent->pt_deactivate)
parent->pt_deactivate(parent);
psmouse_activate(parent);
}
mutex_unlock(&psmouse_mutex);
}
/*
* psmouse_disconnect() closes and frees.
*/
static void psmouse_disconnect(struct serio *serio)
{
struct psmouse *psmouse = psmouse_from_serio(serio);
struct psmouse *parent = NULL;
mutex_lock(&psmouse_mutex);
psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
/* make sure we don't have a resync in progress */
mutex_unlock(&psmouse_mutex);
flush_workqueue(kpsmoused_wq);
mutex_lock(&psmouse_mutex);
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
parent = psmouse_from_serio(serio->parent);
psmouse_deactivate(parent);
}
if (psmouse->disconnect)
psmouse->disconnect(psmouse);
if (parent && parent->pt_deactivate)
parent->pt_deactivate(parent);
psmouse_set_state(psmouse, PSMOUSE_IGNORE);
serio_close(serio);
serio_set_drvdata(serio, NULL);
if (psmouse->dev)
input_unregister_device(psmouse->dev);
kfree(psmouse);
if (parent)
psmouse_activate(parent);
mutex_unlock(&psmouse_mutex);
}
static int psmouse_switch_protocol(struct psmouse *psmouse,
const struct psmouse_protocol *proto)
{
const struct psmouse_protocol *selected_proto;
struct input_dev *input_dev = psmouse->dev;
enum psmouse_type type;
input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
if (proto && (proto->detect || proto->init)) {
psmouse_apply_defaults(psmouse);
if (proto->detect && proto->detect(psmouse, true) < 0)
return -1;
if (proto->init && proto->init(psmouse) < 0)
return -1;
selected_proto = proto;
} else {
type = psmouse_extensions(psmouse, psmouse_max_proto, true);
selected_proto = psmouse_protocol_by_type(type);
}
psmouse->protocol = selected_proto;
/*
* If mouse's packet size is 3 there is no point in polling the
* device in hopes to detect protocol reset - we won't get less
* than 3 bytes response anyhow.
*/
if (psmouse->pktsize == 3)
psmouse->resync_time = 0;
/*
* Some smart KVMs fake response to POLL command returning just
* 3 bytes and messing up our resync logic, so if initial poll
* fails we won't try polling the device anymore. Hopefully
* such KVM will maintain initially selected protocol.
*/
if (psmouse->resync_time && psmouse->poll(psmouse))
psmouse->resync_time = 0;
snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
selected_proto->name, psmouse->vendor, psmouse->name);
input_dev->name = psmouse->devname;
input_dev->phys = psmouse->phys;
input_dev->id.bustype = BUS_I8042;
input_dev->id.vendor = 0x0002;
input_dev->id.product = psmouse->protocol->type;
input_dev->id.version = psmouse->model;
return 0;
}
/*
* psmouse_connect() is a callback from the serio module when
* an unhandled serio port is found.
*/
static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
{
struct psmouse *psmouse, *parent = NULL;
struct input_dev *input_dev;
int retval = 0, error = -ENOMEM;
mutex_lock(&psmouse_mutex);
/*
* If this is a pass-through port deactivate parent so the device
* connected to this port can be successfully identified
*/
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
parent = psmouse_from_serio(serio->parent);
psmouse_deactivate(parent);
}
psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
input_dev = input_allocate_device();
if (!psmouse || !input_dev)
goto err_free;
ps2_init(&psmouse->ps2dev, serio,
psmouse_pre_receive_byte, psmouse_receive_byte);
INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
psmouse->dev = input_dev;
snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
error = serio_open(serio, drv);
if (error)
goto err_clear_drvdata;
/* give PT device some time to settle down before probing */
if (serio->id.type == SERIO_PS_PSTHRU)
usleep_range(10000, 15000);
if (psmouse_probe(psmouse) < 0) {
error = -ENODEV;
goto err_close_serio;
}
psmouse->rate = psmouse_rate;
psmouse->resolution = psmouse_resolution;
psmouse->resetafter = psmouse_resetafter;
psmouse->resync_time = parent ? 0 : psmouse_resync_time;
psmouse->smartscroll = psmouse_smartscroll;
psmouse_switch_protocol(psmouse, NULL);
if (!psmouse->protocol->smbus_companion) {
psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
psmouse_initialize(psmouse);
error = input_register_device(input_dev);
if (error)
goto err_protocol_disconnect;
} else {
/* Smbus companion will be reporting events, not us. */
input_free_device(input_dev);
psmouse->dev = input_dev = NULL;
}
if (parent && parent->pt_activate)
parent->pt_activate(parent);
/*
* PS/2 devices having SMBus companions should stay disabled
* on PS/2 side, in order to have SMBus part operable.
*/
if (!psmouse->protocol->smbus_companion)
psmouse_activate(psmouse);
out:
/* If this is a pass-through port the parent needs to be re-activated */
if (parent)
psmouse_activate(parent);
mutex_unlock(&psmouse_mutex);
return retval;
err_protocol_disconnect:
if (psmouse->disconnect)
psmouse->disconnect(psmouse);
psmouse_set_state(psmouse, PSMOUSE_IGNORE);
err_close_serio:
serio_close(serio);
err_clear_drvdata:
serio_set_drvdata(serio, NULL);
err_free:
input_free_device(input_dev);
kfree(psmouse);
retval = error;
goto out;
}
static int __psmouse_reconnect(struct serio *serio, bool fast_reconnect)
{
struct psmouse *psmouse = psmouse_from_serio(serio);
struct psmouse *parent = NULL;
int (*reconnect_handler)(struct psmouse *);
enum psmouse_type type;
int rc = -1;
mutex_lock(&psmouse_mutex);
if (fast_reconnect) {
reconnect_handler = psmouse->fast_reconnect;
if (!reconnect_handler) {
rc = -ENOENT;
goto out_unlock;
}
} else {
reconnect_handler = psmouse->reconnect;
}
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
parent = psmouse_from_serio(serio->parent);
psmouse_deactivate(parent);
}
psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
if (reconnect_handler) {
if (reconnect_handler(psmouse))
goto out;
} else {
psmouse_reset(psmouse);
if (psmouse_probe(psmouse) < 0)
goto out;
type = psmouse_extensions(psmouse, psmouse_max_proto, false);
if (psmouse->protocol->type != type)
goto out;
}
/*
* OK, the device type (and capabilities) match the old one,
* we can continue using it, complete initialization
*/
if (!psmouse->protocol->smbus_companion) {
psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
psmouse_initialize(psmouse);
}
if (parent && parent->pt_activate)
parent->pt_activate(parent);
/*
* PS/2 devices having SMBus companions should stay disabled
* on PS/2 side, in order to have SMBus part operable.
*/
if (!psmouse->protocol->smbus_companion)
psmouse_activate(psmouse);
rc = 0;
out:
/* If this is a pass-through port the parent waits to be activated */
if (parent)
psmouse_activate(parent);
out_unlock:
mutex_unlock(&psmouse_mutex);
return rc;
}
static int psmouse_reconnect(struct serio *serio)
{
return __psmouse_reconnect(serio, false);
}
static int psmouse_fast_reconnect(struct serio *serio)
{
return __psmouse_reconnect(serio, true);
}
static struct serio_device_id psmouse_serio_ids[] = {
{
.type = SERIO_8042,
.proto = SERIO_ANY,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{
.type = SERIO_PS_PSTHRU,
.proto = SERIO_ANY,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
static struct serio_driver psmouse_drv = {
.driver = {
.name = "psmouse",
.dev_groups = psmouse_dev_groups,
},
.description = DRIVER_DESC,
.id_table = psmouse_serio_ids,
.interrupt = ps2_interrupt,
.connect = psmouse_connect,
.reconnect = psmouse_reconnect,
.fast_reconnect = psmouse_fast_reconnect,
.disconnect = psmouse_disconnect,
.cleanup = psmouse_cleanup,
};
ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct serio *serio = to_serio_port(dev);
struct psmouse_attribute *attr = to_psmouse_attr(devattr);
struct psmouse *psmouse = psmouse_from_serio(serio);
if (psmouse->protocol->smbus_companion &&
devattr != &psmouse_attr_protocol.dattr)
return -ENOENT;
return attr->show(psmouse, attr->data, buf);
}
ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct serio *serio = to_serio_port(dev);
struct psmouse_attribute *attr = to_psmouse_attr(devattr);
struct psmouse *psmouse, *parent = NULL;
int retval;
retval = mutex_lock_interruptible(&psmouse_mutex);
if (retval)
goto out;
psmouse = psmouse_from_serio(serio);
if (psmouse->protocol->smbus_companion &&
devattr != &psmouse_attr_protocol.dattr) {
retval = -ENOENT;
goto out_unlock;
}
if (attr->protect) {
if (psmouse->state == PSMOUSE_IGNORE) {
retval = -ENODEV;
goto out_unlock;
}
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
parent = psmouse_from_serio(serio->parent);
psmouse_deactivate(parent);
}
if (!psmouse->protocol->smbus_companion)
psmouse_deactivate(psmouse);
}
retval = attr->set(psmouse, attr->data, buf, count);
if (attr->protect) {
if (retval != -ENODEV && !psmouse->protocol->smbus_companion)
psmouse_activate(psmouse);
if (parent)
psmouse_activate(parent);
}
out_unlock:
mutex_unlock(&psmouse_mutex);
out:
return retval;
}
static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
{
unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
return sprintf(buf, "%u\n", *field);
}
static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
{
unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
unsigned int value;
int err;
err = kstrtouint(buf, 10, &value);
if (err)
return err;
*field = value;
return count;
}
static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
{
return sprintf(buf, "%s\n", psmouse->protocol->name);
}
static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
{
struct serio *serio = psmouse->ps2dev.serio;
struct psmouse *parent = NULL;
struct input_dev *old_dev, *new_dev;
const struct psmouse_protocol *proto, *old_proto;
int error;
int retry = 0;
proto = psmouse_protocol_by_name(buf, count);
if (!proto)
return -EINVAL;
if (psmouse->protocol == proto)
return count;
new_dev = input_allocate_device();
if (!new_dev)
return -ENOMEM;
while (!list_empty(&serio->children)) {
if (++retry > 3) {
psmouse_warn(psmouse,
"failed to destroy children ports, protocol change aborted.\n");
input_free_device(new_dev);
return -EIO;
}
mutex_unlock(&psmouse_mutex);
serio_unregister_child_port(serio);
mutex_lock(&psmouse_mutex);
if (serio->drv != &psmouse_drv) {
input_free_device(new_dev);
return -ENODEV;
}
if (psmouse->protocol == proto) {
input_free_device(new_dev);
return count; /* switched by other thread */
}
}
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
parent = psmouse_from_serio(serio->parent);
if (parent->pt_deactivate)
parent->pt_deactivate(parent);
}
old_dev = psmouse->dev;
old_proto = psmouse->protocol;
if (psmouse->disconnect)
psmouse->disconnect(psmouse);
psmouse_set_state(psmouse, PSMOUSE_IGNORE);
psmouse->dev = new_dev;
psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
if (psmouse_switch_protocol(psmouse, proto) < 0) {
psmouse_reset(psmouse);
/* default to PSMOUSE_PS2 */
psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
}
psmouse_initialize(psmouse);
psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
if (psmouse->protocol->smbus_companion) {
input_free_device(psmouse->dev);
psmouse->dev = NULL;
} else {
error = input_register_device(psmouse->dev);
if (error) {
if (psmouse->disconnect)
psmouse->disconnect(psmouse);
psmouse_set_state(psmouse, PSMOUSE_IGNORE);
input_free_device(new_dev);
psmouse->dev = old_dev;
psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
psmouse_switch_protocol(psmouse, old_proto);
psmouse_initialize(psmouse);
psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
return error;
}
}
if (old_dev)
input_unregister_device(old_dev);
if (parent && parent->pt_activate)
parent->pt_activate(parent);
return count;
}
static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
{
unsigned int value;
int err;
err = kstrtouint(buf, 10, &value);
if (err)
return err;
psmouse->set_rate(psmouse, value);
return count;
}
static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
{
unsigned int value;
int err;
err = kstrtouint(buf, 10, &value);
if (err)
return err;
psmouse->set_resolution(psmouse, value);
return count;
}
static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
{
const struct psmouse_protocol *proto;
if (!val)
return -EINVAL;
proto = psmouse_protocol_by_name(val, strlen(val));
if (!proto || !proto->maxproto)
return -EINVAL;
*((unsigned int *)kp->arg) = proto->type;
return 0;
}
static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
{
int type = *((unsigned int *)kp->arg);
return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
}
static int __init psmouse_init(void)
{
int err;
lifebook_module_init();
synaptics_module_init();
hgpk_module_init();
err = psmouse_smbus_module_init();
if (err)
return err;
kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0);
if (!kpsmoused_wq) {
pr_err("failed to create kpsmoused workqueue\n");
err = -ENOMEM;
goto err_smbus_exit;
}
err = serio_register_driver(&psmouse_drv);
if (err)
goto err_destroy_wq;
return 0;
err_destroy_wq:
destroy_workqueue(kpsmoused_wq);
err_smbus_exit:
psmouse_smbus_module_exit();
return err;
}
static void __exit psmouse_exit(void)
{
serio_unregister_driver(&psmouse_drv);
destroy_workqueue(kpsmoused_wq);
psmouse_smbus_module_exit();
}
module_init(psmouse_init);
module_exit(psmouse_exit);
|
linux-master
|
drivers/input/mouse/psmouse-base.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 1999-2001 Vojtech Pavlik
*
* Based on the work of:
* Teemu Rantanen Derrick Cole
* Peter Cervasio Christoph Niemann
* Philip Blundell Russell King
* Bob Harris
*/
/*
* Inport (ATI XL and Microsoft) busmouse driver for Linux
*/
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <asm/io.h>
#include <asm/irq.h>
MODULE_AUTHOR("Vojtech Pavlik <[email protected]>");
MODULE_DESCRIPTION("Inport (ATI XL and Microsoft) busmouse driver");
MODULE_LICENSE("GPL");
#define INPORT_BASE 0x23c
#define INPORT_EXTENT 4
#define INPORT_CONTROL_PORT INPORT_BASE + 0
#define INPORT_DATA_PORT INPORT_BASE + 1
#define INPORT_SIGNATURE_PORT INPORT_BASE + 2
#define INPORT_REG_BTNS 0x00
#define INPORT_REG_X 0x01
#define INPORT_REG_Y 0x02
#define INPORT_REG_MODE 0x07
#define INPORT_RESET 0x80
#ifdef CONFIG_MOUSE_ATIXL
#define INPORT_NAME "ATI XL Mouse"
#define INPORT_VENDOR 0x0002
#define INPORT_SPEED_30HZ 0x01
#define INPORT_SPEED_50HZ 0x02
#define INPORT_SPEED_100HZ 0x03
#define INPORT_SPEED_200HZ 0x04
#define INPORT_MODE_BASE INPORT_SPEED_100HZ
#define INPORT_MODE_IRQ 0x08
#else
#define INPORT_NAME "Microsoft InPort Mouse"
#define INPORT_VENDOR 0x0001
#define INPORT_MODE_BASE 0x10
#define INPORT_MODE_IRQ 0x01
#endif
#define INPORT_MODE_HOLD 0x20
#define INPORT_IRQ 5
static int inport_irq = INPORT_IRQ;
module_param_hw_named(irq, inport_irq, uint, irq, 0);
MODULE_PARM_DESC(irq, "IRQ number (5=default)");
static struct input_dev *inport_dev;
static irqreturn_t inport_interrupt(int irq, void *dev_id)
{
unsigned char buttons;
outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
outb(INPORT_MODE_HOLD | INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
outb(INPORT_REG_X, INPORT_CONTROL_PORT);
input_report_rel(inport_dev, REL_X, inb(INPORT_DATA_PORT));
outb(INPORT_REG_Y, INPORT_CONTROL_PORT);
input_report_rel(inport_dev, REL_Y, inb(INPORT_DATA_PORT));
outb(INPORT_REG_BTNS, INPORT_CONTROL_PORT);
buttons = inb(INPORT_DATA_PORT);
input_report_key(inport_dev, BTN_MIDDLE, buttons & 1);
input_report_key(inport_dev, BTN_LEFT, buttons & 2);
input_report_key(inport_dev, BTN_RIGHT, buttons & 4);
outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
input_sync(inport_dev);
return IRQ_HANDLED;
}
static int inport_open(struct input_dev *dev)
{
if (request_irq(inport_irq, inport_interrupt, 0, "inport", NULL))
return -EBUSY;
outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
return 0;
}
static void inport_close(struct input_dev *dev)
{
outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
free_irq(inport_irq, NULL);
}
static int __init inport_init(void)
{
unsigned char a, b, c;
int err;
if (!request_region(INPORT_BASE, INPORT_EXTENT, "inport")) {
printk(KERN_ERR "inport.c: Can't allocate ports at %#x\n", INPORT_BASE);
return -EBUSY;
}
a = inb(INPORT_SIGNATURE_PORT);
b = inb(INPORT_SIGNATURE_PORT);
c = inb(INPORT_SIGNATURE_PORT);
if (a == b || a != c) {
printk(KERN_INFO "inport.c: Didn't find InPort mouse at %#x\n", INPORT_BASE);
err = -ENODEV;
goto err_release_region;
}
inport_dev = input_allocate_device();
if (!inport_dev) {
printk(KERN_ERR "inport.c: Not enough memory for input device\n");
err = -ENOMEM;
goto err_release_region;
}
inport_dev->name = INPORT_NAME;
inport_dev->phys = "isa023c/input0";
inport_dev->id.bustype = BUS_ISA;
inport_dev->id.vendor = INPORT_VENDOR;
inport_dev->id.product = 0x0001;
inport_dev->id.version = 0x0100;
inport_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
inport_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
inport_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
inport_dev->open = inport_open;
inport_dev->close = inport_close;
outb(INPORT_RESET, INPORT_CONTROL_PORT);
outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
err = input_register_device(inport_dev);
if (err)
goto err_free_dev;
return 0;
err_free_dev:
input_free_device(inport_dev);
err_release_region:
release_region(INPORT_BASE, INPORT_EXTENT);
return err;
}
static void __exit inport_exit(void)
{
input_unregister_device(inport_dev);
release_region(INPORT_BASE, INPORT_EXTENT);
}
module_init(inport_init);
module_exit(inport_exit);
|
linux-master
|
drivers/input/mouse/inport.c
|
/*
* Cypress APA trackpad with I2C interface
*
* Author: Dudley Du <[email protected]>
* Further cleanup and restructuring by:
* Daniel Kurtz <[email protected]>
* Benson Leung <[email protected]>
*
* Copyright (C) 2011-2015 Cypress Semiconductor, Inc.
* Copyright (C) 2011-2012 Google, Inc.
*
* 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.
*/
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <asm/unaligned.h>
#include "cyapa.h"
#define GEN3_MAX_FINGERS 5
#define GEN3_FINGER_NUM(x) (((x) >> 4) & 0x07)
#define BLK_HEAD_BYTES 32
/* Macro for register map group offset. */
#define PRODUCT_ID_SIZE 16
#define QUERY_DATA_SIZE 27
#define REG_PROTOCOL_GEN_QUERY_OFFSET 20
#define REG_OFFSET_DATA_BASE 0x0000
#define REG_OFFSET_COMMAND_BASE 0x0028
#define REG_OFFSET_QUERY_BASE 0x002a
#define CYAPA_OFFSET_SOFT_RESET REG_OFFSET_COMMAND_BASE
#define OP_RECALIBRATION_MASK 0x80
#define OP_REPORT_BASELINE_MASK 0x40
#define REG_OFFSET_MAX_BASELINE 0x0026
#define REG_OFFSET_MIN_BASELINE 0x0027
#define REG_OFFSET_POWER_MODE (REG_OFFSET_COMMAND_BASE + 1)
#define SET_POWER_MODE_DELAY 10000 /* Unit: us */
#define SET_POWER_MODE_TRIES 5
#define GEN3_BL_CMD_CHECKSUM_SEED 0xff
#define GEN3_BL_CMD_INITIATE_BL 0x38
#define GEN3_BL_CMD_WRITE_BLOCK 0x39
#define GEN3_BL_CMD_VERIFY_BLOCK 0x3a
#define GEN3_BL_CMD_TERMINATE_BL 0x3b
#define GEN3_BL_CMD_LAUNCH_APP 0xa5
/*
* CYAPA trackpad device states.
* Used in register 0x00, bit1-0, DeviceStatus field.
* Other values indicate device is in an abnormal state and must be reset.
*/
#define CYAPA_DEV_NORMAL 0x03
#define CYAPA_DEV_BUSY 0x01
#define CYAPA_FW_BLOCK_SIZE 64
#define CYAPA_FW_READ_SIZE 16
#define CYAPA_FW_HDR_START 0x0780
#define CYAPA_FW_HDR_BLOCK_COUNT 2
#define CYAPA_FW_HDR_BLOCK_START (CYAPA_FW_HDR_START / CYAPA_FW_BLOCK_SIZE)
#define CYAPA_FW_HDR_SIZE (CYAPA_FW_HDR_BLOCK_COUNT * \
CYAPA_FW_BLOCK_SIZE)
#define CYAPA_FW_DATA_START 0x0800
#define CYAPA_FW_DATA_BLOCK_COUNT 480
#define CYAPA_FW_DATA_BLOCK_START (CYAPA_FW_DATA_START / CYAPA_FW_BLOCK_SIZE)
#define CYAPA_FW_DATA_SIZE (CYAPA_FW_DATA_BLOCK_COUNT * \
CYAPA_FW_BLOCK_SIZE)
#define CYAPA_FW_SIZE (CYAPA_FW_HDR_SIZE + CYAPA_FW_DATA_SIZE)
#define CYAPA_CMD_LEN 16
#define GEN3_BL_IDLE_FW_MAJ_VER_OFFSET 0x0b
#define GEN3_BL_IDLE_FW_MIN_VER_OFFSET (GEN3_BL_IDLE_FW_MAJ_VER_OFFSET + 1)
struct cyapa_touch {
/*
* high bits or x/y position value
* bit 7 - 4: high 4 bits of x position value
* bit 3 - 0: high 4 bits of y position value
*/
u8 xy_hi;
u8 x_lo; /* low 8 bits of x position value. */
u8 y_lo; /* low 8 bits of y position value. */
u8 pressure;
/* id range is 1 - 15. It is incremented with every new touch. */
u8 id;
} __packed;
struct cyapa_reg_data {
/*
* bit 0 - 1: device status
* bit 3 - 2: power mode
* bit 6 - 4: reserved
* bit 7: interrupt valid bit
*/
u8 device_status;
/*
* bit 7 - 4: number of fingers currently touching pad
* bit 3: valid data check bit
* bit 2: middle mechanism button state if exists
* bit 1: right mechanism button state if exists
* bit 0: left mechanism button state if exists
*/
u8 finger_btn;
/* CYAPA reports up to 5 touches per packet. */
struct cyapa_touch touches[5];
} __packed;
struct gen3_write_block_cmd {
u8 checksum_seed; /* Always be 0xff */
u8 cmd_code; /* command code: 0x39 */
u8 key[8]; /* 8-byte security key */
__be16 block_num;
u8 block_data[CYAPA_FW_BLOCK_SIZE];
u8 block_checksum; /* Calculated using bytes 12 - 75 */
u8 cmd_checksum; /* Calculated using bytes 0-76 */
} __packed;
static const u8 security_key[] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 };
static const u8 bl_activate[] = { 0x00, 0xff, 0x38, 0x00, 0x01, 0x02, 0x03,
0x04, 0x05, 0x06, 0x07 };
static const u8 bl_deactivate[] = { 0x00, 0xff, 0x3b, 0x00, 0x01, 0x02, 0x03,
0x04, 0x05, 0x06, 0x07 };
static const u8 bl_exit[] = { 0x00, 0xff, 0xa5, 0x00, 0x01, 0x02, 0x03, 0x04,
0x05, 0x06, 0x07 };
/* for byte read/write command */
#define CMD_RESET 0
#define CMD_POWER_MODE 1
#define CMD_DEV_STATUS 2
#define CMD_REPORT_MAX_BASELINE 3
#define CMD_REPORT_MIN_BASELINE 4
#define SMBUS_BYTE_CMD(cmd) (((cmd) & 0x3f) << 1)
#define CYAPA_SMBUS_RESET SMBUS_BYTE_CMD(CMD_RESET)
#define CYAPA_SMBUS_POWER_MODE SMBUS_BYTE_CMD(CMD_POWER_MODE)
#define CYAPA_SMBUS_DEV_STATUS SMBUS_BYTE_CMD(CMD_DEV_STATUS)
#define CYAPA_SMBUS_MAX_BASELINE SMBUS_BYTE_CMD(CMD_REPORT_MAX_BASELINE)
#define CYAPA_SMBUS_MIN_BASELINE SMBUS_BYTE_CMD(CMD_REPORT_MIN_BASELINE)
/* for group registers read/write command */
#define REG_GROUP_DATA 0
#define REG_GROUP_CMD 2
#define REG_GROUP_QUERY 3
#define SMBUS_GROUP_CMD(grp) (0x80 | (((grp) & 0x07) << 3))
#define CYAPA_SMBUS_GROUP_DATA SMBUS_GROUP_CMD(REG_GROUP_DATA)
#define CYAPA_SMBUS_GROUP_CMD SMBUS_GROUP_CMD(REG_GROUP_CMD)
#define CYAPA_SMBUS_GROUP_QUERY SMBUS_GROUP_CMD(REG_GROUP_QUERY)
/* for register block read/write command */
#define CMD_BL_STATUS 0
#define CMD_BL_HEAD 1
#define CMD_BL_CMD 2
#define CMD_BL_DATA 3
#define CMD_BL_ALL 4
#define CMD_BLK_PRODUCT_ID 5
#define CMD_BLK_HEAD 6
#define SMBUS_BLOCK_CMD(cmd) (0xc0 | (((cmd) & 0x1f) << 1))
/* register block read/write command in bootloader mode */
#define CYAPA_SMBUS_BL_STATUS SMBUS_BLOCK_CMD(CMD_BL_STATUS)
#define CYAPA_SMBUS_BL_HEAD SMBUS_BLOCK_CMD(CMD_BL_HEAD)
#define CYAPA_SMBUS_BL_CMD SMBUS_BLOCK_CMD(CMD_BL_CMD)
#define CYAPA_SMBUS_BL_DATA SMBUS_BLOCK_CMD(CMD_BL_DATA)
#define CYAPA_SMBUS_BL_ALL SMBUS_BLOCK_CMD(CMD_BL_ALL)
/* register block read/write command in operational mode */
#define CYAPA_SMBUS_BLK_PRODUCT_ID SMBUS_BLOCK_CMD(CMD_BLK_PRODUCT_ID)
#define CYAPA_SMBUS_BLK_HEAD SMBUS_BLOCK_CMD(CMD_BLK_HEAD)
struct cyapa_cmd_len {
u8 cmd;
u8 len;
};
/* maps generic CYAPA_CMD_* code to the I2C equivalent */
static const struct cyapa_cmd_len cyapa_i2c_cmds[] = {
{ CYAPA_OFFSET_SOFT_RESET, 1 }, /* CYAPA_CMD_SOFT_RESET */
{ REG_OFFSET_COMMAND_BASE + 1, 1 }, /* CYAPA_CMD_POWER_MODE */
{ REG_OFFSET_DATA_BASE, 1 }, /* CYAPA_CMD_DEV_STATUS */
{ REG_OFFSET_DATA_BASE, sizeof(struct cyapa_reg_data) },
/* CYAPA_CMD_GROUP_DATA */
{ REG_OFFSET_COMMAND_BASE, 0 }, /* CYAPA_CMD_GROUP_CMD */
{ REG_OFFSET_QUERY_BASE, QUERY_DATA_SIZE }, /* CYAPA_CMD_GROUP_QUERY */
{ BL_HEAD_OFFSET, 3 }, /* CYAPA_CMD_BL_STATUS */
{ BL_HEAD_OFFSET, 16 }, /* CYAPA_CMD_BL_HEAD */
{ BL_HEAD_OFFSET, 16 }, /* CYAPA_CMD_BL_CMD */
{ BL_DATA_OFFSET, 16 }, /* CYAPA_CMD_BL_DATA */
{ BL_HEAD_OFFSET, 32 }, /* CYAPA_CMD_BL_ALL */
{ REG_OFFSET_QUERY_BASE, PRODUCT_ID_SIZE },
/* CYAPA_CMD_BLK_PRODUCT_ID */
{ REG_OFFSET_DATA_BASE, 32 }, /* CYAPA_CMD_BLK_HEAD */
{ REG_OFFSET_MAX_BASELINE, 1 }, /* CYAPA_CMD_MAX_BASELINE */
{ REG_OFFSET_MIN_BASELINE, 1 }, /* CYAPA_CMD_MIN_BASELINE */
};
static const struct cyapa_cmd_len cyapa_smbus_cmds[] = {
{ CYAPA_SMBUS_RESET, 1 }, /* CYAPA_CMD_SOFT_RESET */
{ CYAPA_SMBUS_POWER_MODE, 1 }, /* CYAPA_CMD_POWER_MODE */
{ CYAPA_SMBUS_DEV_STATUS, 1 }, /* CYAPA_CMD_DEV_STATUS */
{ CYAPA_SMBUS_GROUP_DATA, sizeof(struct cyapa_reg_data) },
/* CYAPA_CMD_GROUP_DATA */
{ CYAPA_SMBUS_GROUP_CMD, 2 }, /* CYAPA_CMD_GROUP_CMD */
{ CYAPA_SMBUS_GROUP_QUERY, QUERY_DATA_SIZE },
/* CYAPA_CMD_GROUP_QUERY */
{ CYAPA_SMBUS_BL_STATUS, 3 }, /* CYAPA_CMD_BL_STATUS */
{ CYAPA_SMBUS_BL_HEAD, 16 }, /* CYAPA_CMD_BL_HEAD */
{ CYAPA_SMBUS_BL_CMD, 16 }, /* CYAPA_CMD_BL_CMD */
{ CYAPA_SMBUS_BL_DATA, 16 }, /* CYAPA_CMD_BL_DATA */
{ CYAPA_SMBUS_BL_ALL, 32 }, /* CYAPA_CMD_BL_ALL */
{ CYAPA_SMBUS_BLK_PRODUCT_ID, PRODUCT_ID_SIZE },
/* CYAPA_CMD_BLK_PRODUCT_ID */
{ CYAPA_SMBUS_BLK_HEAD, 16 }, /* CYAPA_CMD_BLK_HEAD */
{ CYAPA_SMBUS_MAX_BASELINE, 1 }, /* CYAPA_CMD_MAX_BASELINE */
{ CYAPA_SMBUS_MIN_BASELINE, 1 }, /* CYAPA_CMD_MIN_BASELINE */
};
static int cyapa_gen3_try_poll_handler(struct cyapa *cyapa);
/*
* cyapa_smbus_read_block - perform smbus block read command
* @cyapa - private data structure of the driver
* @cmd - the properly encoded smbus command
* @len - expected length of smbus command result
* @values - buffer to store smbus command result
*
* Returns negative errno, else the number of bytes written.
*
* Note:
* In trackpad device, the memory block allocated for I2C register map
* is 256 bytes, so the max read block for I2C bus is 256 bytes.
*/
ssize_t cyapa_smbus_read_block(struct cyapa *cyapa, u8 cmd, size_t len,
u8 *values)
{
ssize_t ret;
u8 index;
u8 smbus_cmd;
u8 *buf;
struct i2c_client *client = cyapa->client;
if (!(SMBUS_BYTE_BLOCK_CMD_MASK & cmd))
return -EINVAL;
if (SMBUS_GROUP_BLOCK_CMD_MASK & cmd) {
/* read specific block registers command. */
smbus_cmd = SMBUS_ENCODE_RW(cmd, SMBUS_READ);
ret = i2c_smbus_read_block_data(client, smbus_cmd, values);
goto out;
}
ret = 0;
for (index = 0; index * I2C_SMBUS_BLOCK_MAX < len; index++) {
smbus_cmd = SMBUS_ENCODE_IDX(cmd, index);
smbus_cmd = SMBUS_ENCODE_RW(smbus_cmd, SMBUS_READ);
buf = values + I2C_SMBUS_BLOCK_MAX * index;
ret = i2c_smbus_read_block_data(client, smbus_cmd, buf);
if (ret < 0)
goto out;
}
out:
return ret > 0 ? len : ret;
}
static s32 cyapa_read_byte(struct cyapa *cyapa, u8 cmd_idx)
{
u8 cmd;
if (cyapa->smbus) {
cmd = cyapa_smbus_cmds[cmd_idx].cmd;
cmd = SMBUS_ENCODE_RW(cmd, SMBUS_READ);
} else {
cmd = cyapa_i2c_cmds[cmd_idx].cmd;
}
return i2c_smbus_read_byte_data(cyapa->client, cmd);
}
static s32 cyapa_write_byte(struct cyapa *cyapa, u8 cmd_idx, u8 value)
{
u8 cmd;
if (cyapa->smbus) {
cmd = cyapa_smbus_cmds[cmd_idx].cmd;
cmd = SMBUS_ENCODE_RW(cmd, SMBUS_WRITE);
} else {
cmd = cyapa_i2c_cmds[cmd_idx].cmd;
}
return i2c_smbus_write_byte_data(cyapa->client, cmd, value);
}
ssize_t cyapa_i2c_reg_read_block(struct cyapa *cyapa, u8 reg, size_t len,
u8 *values)
{
return i2c_smbus_read_i2c_block_data(cyapa->client, reg, len, values);
}
static ssize_t cyapa_i2c_reg_write_block(struct cyapa *cyapa, u8 reg,
size_t len, const u8 *values)
{
return i2c_smbus_write_i2c_block_data(cyapa->client, reg, len, values);
}
ssize_t cyapa_read_block(struct cyapa *cyapa, u8 cmd_idx, u8 *values)
{
u8 cmd;
size_t len;
if (cyapa->smbus) {
cmd = cyapa_smbus_cmds[cmd_idx].cmd;
len = cyapa_smbus_cmds[cmd_idx].len;
return cyapa_smbus_read_block(cyapa, cmd, len, values);
}
cmd = cyapa_i2c_cmds[cmd_idx].cmd;
len = cyapa_i2c_cmds[cmd_idx].len;
return cyapa_i2c_reg_read_block(cyapa, cmd, len, values);
}
/*
* Determine the Gen3 trackpad device's current operating state.
*
*/
static int cyapa_gen3_state_parse(struct cyapa *cyapa, u8 *reg_data, int len)
{
cyapa->state = CYAPA_STATE_NO_DEVICE;
/* Parse based on Gen3 characteristic registers and bits */
if (reg_data[REG_BL_FILE] == BL_FILE &&
reg_data[REG_BL_ERROR] == BL_ERROR_NO_ERR_IDLE &&
(reg_data[REG_BL_STATUS] ==
(BL_STATUS_RUNNING | BL_STATUS_CSUM_VALID) ||
reg_data[REG_BL_STATUS] == BL_STATUS_RUNNING)) {
/*
* Normal state after power on or reset,
* REG_BL_STATUS == 0x11, firmware image checksum is valid.
* REG_BL_STATUS == 0x10, firmware image checksum is invalid.
*/
cyapa->gen = CYAPA_GEN3;
cyapa->state = CYAPA_STATE_BL_IDLE;
} else if (reg_data[REG_BL_FILE] == BL_FILE &&
(reg_data[REG_BL_STATUS] & BL_STATUS_RUNNING) ==
BL_STATUS_RUNNING) {
cyapa->gen = CYAPA_GEN3;
if (reg_data[REG_BL_STATUS] & BL_STATUS_BUSY) {
cyapa->state = CYAPA_STATE_BL_BUSY;
} else {
if ((reg_data[REG_BL_ERROR] & BL_ERROR_BOOTLOADING) ==
BL_ERROR_BOOTLOADING)
cyapa->state = CYAPA_STATE_BL_ACTIVE;
else
cyapa->state = CYAPA_STATE_BL_IDLE;
}
} else if ((reg_data[REG_OP_STATUS] & OP_STATUS_SRC) &&
(reg_data[REG_OP_DATA1] & OP_DATA_VALID)) {
/*
* Normal state when running in operational mode,
* may also not in full power state or
* busying in command process.
*/
if (GEN3_FINGER_NUM(reg_data[REG_OP_DATA1]) <=
GEN3_MAX_FINGERS) {
/* Finger number data is valid. */
cyapa->gen = CYAPA_GEN3;
cyapa->state = CYAPA_STATE_OP;
}
} else if (reg_data[REG_OP_STATUS] == 0x0C &&
reg_data[REG_OP_DATA1] == 0x08) {
/* Op state when first two registers overwritten with 0x00 */
cyapa->gen = CYAPA_GEN3;
cyapa->state = CYAPA_STATE_OP;
} else if (reg_data[REG_BL_STATUS] &
(BL_STATUS_RUNNING | BL_STATUS_BUSY)) {
cyapa->gen = CYAPA_GEN3;
cyapa->state = CYAPA_STATE_BL_BUSY;
}
if (cyapa->gen == CYAPA_GEN3 && (cyapa->state == CYAPA_STATE_OP ||
cyapa->state == CYAPA_STATE_BL_IDLE ||
cyapa->state == CYAPA_STATE_BL_ACTIVE ||
cyapa->state == CYAPA_STATE_BL_BUSY))
return 0;
return -EAGAIN;
}
/*
* Enter bootloader by soft resetting the device.
*
* If device is already in the bootloader, the function just returns.
* Otherwise, reset the device; after reset, device enters bootloader idle
* state immediately.
*
* Returns:
* 0 on success
* -EAGAIN device was reset, but is not now in bootloader idle state
* < 0 if the device never responds within the timeout
*/
static int cyapa_gen3_bl_enter(struct cyapa *cyapa)
{
int error;
int waiting_time;
error = cyapa_poll_state(cyapa, 500);
if (error)
return error;
if (cyapa->state == CYAPA_STATE_BL_IDLE) {
/* Already in BL_IDLE. Skipping reset. */
return 0;
}
if (cyapa->state != CYAPA_STATE_OP)
return -EAGAIN;
cyapa->operational = false;
cyapa->state = CYAPA_STATE_NO_DEVICE;
error = cyapa_write_byte(cyapa, CYAPA_CMD_SOFT_RESET, 0x01);
if (error)
return -EIO;
usleep_range(25000, 50000);
waiting_time = 2000; /* For some shipset, max waiting time is 1~2s. */
do {
error = cyapa_poll_state(cyapa, 500);
if (error) {
if (error == -ETIMEDOUT) {
waiting_time -= 500;
continue;
}
return error;
}
if ((cyapa->state == CYAPA_STATE_BL_IDLE) &&
!(cyapa->status[REG_BL_STATUS] & BL_STATUS_WATCHDOG))
break;
msleep(100);
waiting_time -= 100;
} while (waiting_time > 0);
if ((cyapa->state != CYAPA_STATE_BL_IDLE) ||
(cyapa->status[REG_BL_STATUS] & BL_STATUS_WATCHDOG))
return -EAGAIN;
return 0;
}
static int cyapa_gen3_bl_activate(struct cyapa *cyapa)
{
int error;
error = cyapa_i2c_reg_write_block(cyapa, 0, sizeof(bl_activate),
bl_activate);
if (error)
return error;
/* Wait for bootloader to activate; takes between 2 and 12 seconds */
msleep(2000);
error = cyapa_poll_state(cyapa, 11000);
if (error)
return error;
if (cyapa->state != CYAPA_STATE_BL_ACTIVE)
return -EAGAIN;
return 0;
}
static int cyapa_gen3_bl_deactivate(struct cyapa *cyapa)
{
int error;
error = cyapa_i2c_reg_write_block(cyapa, 0, sizeof(bl_deactivate),
bl_deactivate);
if (error)
return error;
/* Wait for bootloader to switch to idle state; should take < 100ms */
msleep(100);
error = cyapa_poll_state(cyapa, 500);
if (error)
return error;
if (cyapa->state != CYAPA_STATE_BL_IDLE)
return -EAGAIN;
return 0;
}
/*
* Exit bootloader
*
* Send bl_exit command, then wait 50 - 100 ms to let device transition to
* operational mode. If this is the first time the device's firmware is
* running, it can take up to 2 seconds to calibrate its sensors. So, poll
* the device's new state for up to 2 seconds.
*
* Returns:
* -EIO failure while reading from device
* -EAGAIN device is stuck in bootloader, b/c it has invalid firmware
* 0 device is supported and in operational mode
*/
static int cyapa_gen3_bl_exit(struct cyapa *cyapa)
{
int error;
error = cyapa_i2c_reg_write_block(cyapa, 0, sizeof(bl_exit), bl_exit);
if (error)
return error;
/*
* Wait for bootloader to exit, and operation mode to start.
* Normally, this takes at least 50 ms.
*/
msleep(50);
/*
* In addition, when a device boots for the first time after being
* updated to new firmware, it must first calibrate its sensors, which
* can take up to an additional 2 seconds. If the device power is
* running low, this may take even longer.
*/
error = cyapa_poll_state(cyapa, 4000);
if (error < 0)
return error;
if (cyapa->state != CYAPA_STATE_OP)
return -EAGAIN;
return 0;
}
static u16 cyapa_gen3_csum(const u8 *buf, size_t count)
{
int i;
u16 csum = 0;
for (i = 0; i < count; i++)
csum += buf[i];
return csum;
}
/*
* Verify the integrity of a CYAPA firmware image file.
*
* The firmware image file is 30848 bytes, composed of 482 64-byte blocks.
*
* The first 2 blocks are the firmware header.
* The next 480 blocks are the firmware image.
*
* The first two bytes of the header hold the header checksum, computed by
* summing the other 126 bytes of the header.
* The last two bytes of the header hold the firmware image checksum, computed
* by summing the 30720 bytes of the image modulo 0xffff.
*
* Both checksums are stored little-endian.
*/
static int cyapa_gen3_check_fw(struct cyapa *cyapa, const struct firmware *fw)
{
struct device *dev = &cyapa->client->dev;
u16 csum;
u16 csum_expected;
/* Firmware must match exact 30848 bytes = 482 64-byte blocks. */
if (fw->size != CYAPA_FW_SIZE) {
dev_err(dev, "invalid firmware size = %zu, expected %u.\n",
fw->size, CYAPA_FW_SIZE);
return -EINVAL;
}
/* Verify header block */
csum_expected = (fw->data[0] << 8) | fw->data[1];
csum = cyapa_gen3_csum(&fw->data[2], CYAPA_FW_HDR_SIZE - 2);
if (csum != csum_expected) {
dev_err(dev, "%s %04x, expected: %04x\n",
"invalid firmware header checksum = ",
csum, csum_expected);
return -EINVAL;
}
/* Verify firmware image */
csum_expected = (fw->data[CYAPA_FW_HDR_SIZE - 2] << 8) |
fw->data[CYAPA_FW_HDR_SIZE - 1];
csum = cyapa_gen3_csum(&fw->data[CYAPA_FW_HDR_SIZE],
CYAPA_FW_DATA_SIZE);
if (csum != csum_expected) {
dev_err(dev, "%s %04x, expected: %04x\n",
"invalid firmware header checksum = ",
csum, csum_expected);
return -EINVAL;
}
return 0;
}
/*
* Write a |len| byte long buffer |buf| to the device, by chopping it up into a
* sequence of smaller |CYAPA_CMD_LEN|-length write commands.
*
* The data bytes for a write command are prepended with the 1-byte offset
* of the data relative to the start of |buf|.
*/
static int cyapa_gen3_write_buffer(struct cyapa *cyapa,
const u8 *buf, size_t len)
{
int error;
size_t i;
unsigned char cmd[CYAPA_CMD_LEN + 1];
size_t cmd_len;
for (i = 0; i < len; i += CYAPA_CMD_LEN) {
const u8 *payload = &buf[i];
cmd_len = (len - i >= CYAPA_CMD_LEN) ? CYAPA_CMD_LEN : len - i;
cmd[0] = i;
memcpy(&cmd[1], payload, cmd_len);
error = cyapa_i2c_reg_write_block(cyapa, 0, cmd_len + 1, cmd);
if (error)
return error;
}
return 0;
}
/*
* A firmware block write command writes 64 bytes of data to a single flash
* page in the device. The 78-byte block write command has the format:
* <0xff> <CMD> <Key> <Start> <Data> <Data-Checksum> <CMD Checksum>
*
* <0xff> - every command starts with 0xff
* <CMD> - the write command value is 0x39
* <Key> - write commands include an 8-byte key: { 00 01 02 03 04 05 06 07 }
* <Block> - Memory Block number (address / 64) (16-bit, big-endian)
* <Data> - 64 bytes of firmware image data
* <Data Checksum> - sum of 64 <Data> bytes, modulo 0xff
* <CMD Checksum> - sum of 77 bytes, from 0xff to <Data Checksum>
*
* Each write command is split into 5 i2c write transactions of up to 16 bytes.
* Each transaction starts with an i2c register offset: (00, 10, 20, 30, 40).
*/
static int cyapa_gen3_write_fw_block(struct cyapa *cyapa,
u16 block, const u8 *data)
{
int ret;
struct gen3_write_block_cmd write_block_cmd;
u8 status[BL_STATUS_SIZE];
int tries;
u8 bl_status, bl_error;
/* Set write command and security key bytes. */
write_block_cmd.checksum_seed = GEN3_BL_CMD_CHECKSUM_SEED;
write_block_cmd.cmd_code = GEN3_BL_CMD_WRITE_BLOCK;
memcpy(write_block_cmd.key, security_key, sizeof(security_key));
put_unaligned_be16(block, &write_block_cmd.block_num);
memcpy(write_block_cmd.block_data, data, CYAPA_FW_BLOCK_SIZE);
write_block_cmd.block_checksum = cyapa_gen3_csum(
write_block_cmd.block_data, CYAPA_FW_BLOCK_SIZE);
write_block_cmd.cmd_checksum = cyapa_gen3_csum((u8 *)&write_block_cmd,
sizeof(write_block_cmd) - 1);
ret = cyapa_gen3_write_buffer(cyapa, (u8 *)&write_block_cmd,
sizeof(write_block_cmd));
if (ret)
return ret;
/* Wait for write to finish */
tries = 11; /* Programming for one block can take about 100ms. */
do {
usleep_range(10000, 20000);
/* Check block write command result status. */
ret = cyapa_i2c_reg_read_block(cyapa, BL_HEAD_OFFSET,
BL_STATUS_SIZE, status);
if (ret != BL_STATUS_SIZE)
return (ret < 0) ? ret : -EIO;
} while ((status[REG_BL_STATUS] & BL_STATUS_BUSY) && --tries);
/* Ignore WATCHDOG bit and reserved bits. */
bl_status = status[REG_BL_STATUS] & ~BL_STATUS_REV_MASK;
bl_error = status[REG_BL_ERROR] & ~BL_ERROR_RESERVED;
if (bl_status & BL_STATUS_BUSY)
ret = -ETIMEDOUT;
else if (bl_status != BL_STATUS_RUNNING ||
bl_error != BL_ERROR_BOOTLOADING)
ret = -EIO;
else
ret = 0;
return ret;
}
static int cyapa_gen3_write_blocks(struct cyapa *cyapa,
size_t start_block, size_t block_count,
const u8 *image_data)
{
int error;
int i;
for (i = 0; i < block_count; i++) {
size_t block = start_block + i;
size_t addr = i * CYAPA_FW_BLOCK_SIZE;
const u8 *data = &image_data[addr];
error = cyapa_gen3_write_fw_block(cyapa, block, data);
if (error)
return error;
}
return 0;
}
static int cyapa_gen3_do_fw_update(struct cyapa *cyapa,
const struct firmware *fw)
{
struct device *dev = &cyapa->client->dev;
int error;
/* First write data, starting at byte 128 of fw->data */
error = cyapa_gen3_write_blocks(cyapa,
CYAPA_FW_DATA_BLOCK_START, CYAPA_FW_DATA_BLOCK_COUNT,
&fw->data[CYAPA_FW_HDR_BLOCK_COUNT * CYAPA_FW_BLOCK_SIZE]);
if (error) {
dev_err(dev, "FW update aborted, write image: %d\n", error);
return error;
}
/* Then write checksum */
error = cyapa_gen3_write_blocks(cyapa,
CYAPA_FW_HDR_BLOCK_START, CYAPA_FW_HDR_BLOCK_COUNT,
&fw->data[0]);
if (error) {
dev_err(dev, "FW update aborted, write checksum: %d\n", error);
return error;
}
return 0;
}
static ssize_t cyapa_gen3_do_calibrate(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct cyapa *cyapa = dev_get_drvdata(dev);
unsigned long timeout;
int ret;
ret = cyapa_read_byte(cyapa, CYAPA_CMD_DEV_STATUS);
if (ret < 0) {
dev_err(dev, "Error reading dev status: %d\n", ret);
goto out;
}
if ((ret & CYAPA_DEV_NORMAL) != CYAPA_DEV_NORMAL) {
dev_warn(dev, "Trackpad device is busy, device state: 0x%02x\n",
ret);
ret = -EAGAIN;
goto out;
}
ret = cyapa_write_byte(cyapa, CYAPA_CMD_SOFT_RESET,
OP_RECALIBRATION_MASK);
if (ret < 0) {
dev_err(dev, "Failed to send calibrate command: %d\n",
ret);
goto out;
}
/* max recalibration timeout 2s. */
timeout = jiffies + 2 * HZ;
do {
/*
* For this recalibration, the max time will not exceed 2s.
* The average time is approximately 500 - 700 ms, and we
* will check the status every 100 - 200ms.
*/
msleep(100);
ret = cyapa_read_byte(cyapa, CYAPA_CMD_DEV_STATUS);
if (ret < 0) {
dev_err(dev, "Error reading dev status: %d\n", ret);
goto out;
}
if ((ret & CYAPA_DEV_NORMAL) == CYAPA_DEV_NORMAL) {
dev_dbg(dev, "Calibration successful.\n");
goto out;
}
} while (time_is_after_jiffies(timeout));
dev_err(dev, "Failed to calibrate. Timeout.\n");
ret = -ETIMEDOUT;
out:
return ret < 0 ? ret : count;
}
static ssize_t cyapa_gen3_show_baseline(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct cyapa *cyapa = dev_get_drvdata(dev);
int max_baseline, min_baseline;
int tries;
int ret;
ret = cyapa_read_byte(cyapa, CYAPA_CMD_DEV_STATUS);
if (ret < 0) {
dev_err(dev, "Error reading dev status. err = %d\n", ret);
goto out;
}
if ((ret & CYAPA_DEV_NORMAL) != CYAPA_DEV_NORMAL) {
dev_warn(dev, "Trackpad device is busy. device state = 0x%x\n",
ret);
ret = -EAGAIN;
goto out;
}
ret = cyapa_write_byte(cyapa, CYAPA_CMD_SOFT_RESET,
OP_REPORT_BASELINE_MASK);
if (ret < 0) {
dev_err(dev, "Failed to send report baseline command. %d\n",
ret);
goto out;
}
tries = 3; /* Try for 30 to 60 ms */
do {
usleep_range(10000, 20000);
ret = cyapa_read_byte(cyapa, CYAPA_CMD_DEV_STATUS);
if (ret < 0) {
dev_err(dev, "Error reading dev status. err = %d\n",
ret);
goto out;
}
if ((ret & CYAPA_DEV_NORMAL) == CYAPA_DEV_NORMAL)
break;
} while (--tries);
if (tries == 0) {
dev_err(dev, "Device timed out going to Normal state.\n");
ret = -ETIMEDOUT;
goto out;
}
ret = cyapa_read_byte(cyapa, CYAPA_CMD_MAX_BASELINE);
if (ret < 0) {
dev_err(dev, "Failed to read max baseline. err = %d\n", ret);
goto out;
}
max_baseline = ret;
ret = cyapa_read_byte(cyapa, CYAPA_CMD_MIN_BASELINE);
if (ret < 0) {
dev_err(dev, "Failed to read min baseline. err = %d\n", ret);
goto out;
}
min_baseline = ret;
dev_dbg(dev, "Baseline report successful. Max: %d Min: %d\n",
max_baseline, min_baseline);
ret = scnprintf(buf, PAGE_SIZE, "%d %d\n", max_baseline, min_baseline);
out:
return ret;
}
/*
* cyapa_get_wait_time_for_pwr_cmd
*
* Compute the amount of time we need to wait after updating the touchpad
* power mode. The touchpad needs to consume the incoming power mode set
* command at the current clock rate.
*/
static u16 cyapa_get_wait_time_for_pwr_cmd(u8 pwr_mode)
{
switch (pwr_mode) {
case PWR_MODE_FULL_ACTIVE: return 20;
case PWR_MODE_BTN_ONLY: return 20;
case PWR_MODE_OFF: return 20;
default: return cyapa_pwr_cmd_to_sleep_time(pwr_mode) + 50;
}
}
/*
* Set device power mode
*
* Write to the field to configure power state. Power states include :
* Full : Max scans and report rate.
* Idle : Report rate set by user specified time.
* ButtonOnly : No scans for fingers. When the button is triggered,
* a slave interrupt is asserted to notify host to wake up.
* Off : Only awake for i2c commands from host. No function for button
* or touch sensors.
*
* The power_mode command should conform to the following :
* Full : 0x3f
* Idle : Configurable from 20 to 1000ms. See note below for
* cyapa_sleep_time_to_pwr_cmd and cyapa_pwr_cmd_to_sleep_time
* ButtonOnly : 0x01
* Off : 0x00
*
* Device power mode can only be set when device is in operational mode.
*/
static int cyapa_gen3_set_power_mode(struct cyapa *cyapa, u8 power_mode,
u16 always_unused, enum cyapa_pm_stage pm_stage)
{
struct input_dev *input = cyapa->input;
u8 power;
int tries;
int sleep_time;
int interval;
int ret;
if (cyapa->state != CYAPA_STATE_OP)
return 0;
tries = SET_POWER_MODE_TRIES;
while (tries--) {
ret = cyapa_read_byte(cyapa, CYAPA_CMD_POWER_MODE);
if (ret >= 0)
break;
usleep_range(SET_POWER_MODE_DELAY, 2 * SET_POWER_MODE_DELAY);
}
if (ret < 0)
return ret;
/*
* Return early if the power mode to set is the same as the current
* one.
*/
if ((ret & PWR_MODE_MASK) == power_mode)
return 0;
sleep_time = (int)cyapa_get_wait_time_for_pwr_cmd(ret & PWR_MODE_MASK);
power = ret;
power &= ~PWR_MODE_MASK;
power |= power_mode & PWR_MODE_MASK;
tries = SET_POWER_MODE_TRIES;
while (tries--) {
ret = cyapa_write_byte(cyapa, CYAPA_CMD_POWER_MODE, power);
if (!ret)
break;
usleep_range(SET_POWER_MODE_DELAY, 2 * SET_POWER_MODE_DELAY);
}
/*
* Wait for the newly set power command to go in at the previous
* clock speed (scanrate) used by the touchpad firmware. Not
* doing so before issuing the next command may result in errors
* depending on the command's content.
*/
if (cyapa->operational &&
input && input_device_enabled(input) &&
(pm_stage == CYAPA_PM_RUNTIME_SUSPEND ||
pm_stage == CYAPA_PM_RUNTIME_RESUME)) {
/* Try to polling in 120Hz, read may fail, just ignore it. */
interval = 1000 / 120;
while (sleep_time > 0) {
if (sleep_time > interval)
msleep(interval);
else
msleep(sleep_time);
sleep_time -= interval;
cyapa_gen3_try_poll_handler(cyapa);
}
} else {
msleep(sleep_time);
}
return ret;
}
static int cyapa_gen3_set_proximity(struct cyapa *cyapa, bool enable)
{
return -EOPNOTSUPP;
}
static int cyapa_gen3_get_query_data(struct cyapa *cyapa)
{
u8 query_data[QUERY_DATA_SIZE];
int ret;
if (cyapa->state != CYAPA_STATE_OP)
return -EBUSY;
ret = cyapa_read_block(cyapa, CYAPA_CMD_GROUP_QUERY, query_data);
if (ret != QUERY_DATA_SIZE)
return (ret < 0) ? ret : -EIO;
memcpy(&cyapa->product_id[0], &query_data[0], 5);
cyapa->product_id[5] = '-';
memcpy(&cyapa->product_id[6], &query_data[5], 6);
cyapa->product_id[12] = '-';
memcpy(&cyapa->product_id[13], &query_data[11], 2);
cyapa->product_id[15] = '\0';
cyapa->fw_maj_ver = query_data[15];
cyapa->fw_min_ver = query_data[16];
cyapa->btn_capability = query_data[19] & CAPABILITY_BTN_MASK;
cyapa->gen = query_data[20] & 0x0f;
cyapa->max_abs_x = ((query_data[21] & 0xf0) << 4) | query_data[22];
cyapa->max_abs_y = ((query_data[21] & 0x0f) << 8) | query_data[23];
cyapa->physical_size_x =
((query_data[24] & 0xf0) << 4) | query_data[25];
cyapa->physical_size_y =
((query_data[24] & 0x0f) << 8) | query_data[26];
cyapa->max_z = 255;
return 0;
}
static int cyapa_gen3_bl_query_data(struct cyapa *cyapa)
{
u8 bl_data[CYAPA_CMD_LEN];
int ret;
ret = cyapa_i2c_reg_read_block(cyapa, 0, CYAPA_CMD_LEN, bl_data);
if (ret != CYAPA_CMD_LEN)
return (ret < 0) ? ret : -EIO;
/*
* This value will be updated again when entered application mode.
* If TP failed to enter application mode, this fw version values
* can be used as a reference.
* This firmware version valid when fw image checksum is valid.
*/
if (bl_data[REG_BL_STATUS] ==
(BL_STATUS_RUNNING | BL_STATUS_CSUM_VALID)) {
cyapa->fw_maj_ver = bl_data[GEN3_BL_IDLE_FW_MAJ_VER_OFFSET];
cyapa->fw_min_ver = bl_data[GEN3_BL_IDLE_FW_MIN_VER_OFFSET];
}
return 0;
}
/*
* Check if device is operational.
*
* An operational device is responding, has exited bootloader, and has
* firmware supported by this driver.
*
* Returns:
* -EBUSY no device or in bootloader
* -EIO failure while reading from device
* -EAGAIN device is still in bootloader
* if ->state = CYAPA_STATE_BL_IDLE, device has invalid firmware
* -EINVAL device is in operational mode, but not supported by this driver
* 0 device is supported
*/
static int cyapa_gen3_do_operational_check(struct cyapa *cyapa)
{
struct device *dev = &cyapa->client->dev;
int error;
switch (cyapa->state) {
case CYAPA_STATE_BL_ACTIVE:
error = cyapa_gen3_bl_deactivate(cyapa);
if (error) {
dev_err(dev, "failed to bl_deactivate: %d\n", error);
return error;
}
fallthrough;
case CYAPA_STATE_BL_IDLE:
/* Try to get firmware version in bootloader mode. */
cyapa_gen3_bl_query_data(cyapa);
error = cyapa_gen3_bl_exit(cyapa);
if (error) {
dev_err(dev, "failed to bl_exit: %d\n", error);
return error;
}
fallthrough;
case CYAPA_STATE_OP:
/*
* Reading query data before going back to the full mode
* may cause problems, so we set the power mode first here.
*/
error = cyapa_gen3_set_power_mode(cyapa,
PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_ACTIVE);
if (error)
dev_err(dev, "%s: set full power mode failed: %d\n",
__func__, error);
error = cyapa_gen3_get_query_data(cyapa);
if (error < 0)
return error;
/* Only support firmware protocol gen3 */
if (cyapa->gen != CYAPA_GEN3) {
dev_err(dev, "unsupported protocol version (%d)",
cyapa->gen);
return -EINVAL;
}
/* Only support product ID starting with CYTRA */
if (memcmp(cyapa->product_id, product_id,
strlen(product_id)) != 0) {
dev_err(dev, "unsupported product ID (%s)\n",
cyapa->product_id);
return -EINVAL;
}
return 0;
default:
return -EIO;
}
return 0;
}
/*
* Return false, do not continue process
* Return true, continue process.
*/
static bool cyapa_gen3_irq_cmd_handler(struct cyapa *cyapa)
{
/* Not gen3 irq command response, skip for continue. */
if (cyapa->gen != CYAPA_GEN3)
return true;
if (cyapa->operational)
return true;
/*
* Driver in detecting or other interface function processing,
* so, stop cyapa_gen3_irq_handler to continue process to
* avoid unwanted to error detecting and processing.
*
* And also, avoid the periodically asserted interrupts to be processed
* as touch inputs when gen3 failed to launch into application mode,
* which will cause gen3 stays in bootloader mode.
*/
return false;
}
static int cyapa_gen3_event_process(struct cyapa *cyapa,
struct cyapa_reg_data *data)
{
struct input_dev *input = cyapa->input;
int num_fingers;
int i;
num_fingers = (data->finger_btn >> 4) & 0x0f;
for (i = 0; i < num_fingers; i++) {
const struct cyapa_touch *touch = &data->touches[i];
/* Note: touch->id range is 1 to 15; slots are 0 to 14. */
int slot = touch->id - 1;
input_mt_slot(input, slot);
input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
input_report_abs(input, ABS_MT_POSITION_X,
((touch->xy_hi & 0xf0) << 4) | touch->x_lo);
input_report_abs(input, ABS_MT_POSITION_Y,
((touch->xy_hi & 0x0f) << 8) | touch->y_lo);
input_report_abs(input, ABS_MT_PRESSURE, touch->pressure);
}
input_mt_sync_frame(input);
if (cyapa->btn_capability & CAPABILITY_LEFT_BTN_MASK)
input_report_key(input, BTN_LEFT,
!!(data->finger_btn & OP_DATA_LEFT_BTN));
if (cyapa->btn_capability & CAPABILITY_MIDDLE_BTN_MASK)
input_report_key(input, BTN_MIDDLE,
!!(data->finger_btn & OP_DATA_MIDDLE_BTN));
if (cyapa->btn_capability & CAPABILITY_RIGHT_BTN_MASK)
input_report_key(input, BTN_RIGHT,
!!(data->finger_btn & OP_DATA_RIGHT_BTN));
input_sync(input);
return 0;
}
static int cyapa_gen3_irq_handler(struct cyapa *cyapa)
{
struct device *dev = &cyapa->client->dev;
struct cyapa_reg_data data;
int ret;
ret = cyapa_read_block(cyapa, CYAPA_CMD_GROUP_DATA, (u8 *)&data);
if (ret != sizeof(data)) {
dev_err(dev, "failed to read report data, (%d)\n", ret);
return -EINVAL;
}
if ((data.device_status & OP_STATUS_SRC) != OP_STATUS_SRC ||
(data.device_status & OP_STATUS_DEV) != CYAPA_DEV_NORMAL ||
(data.finger_btn & OP_DATA_VALID) != OP_DATA_VALID) {
dev_err(dev, "invalid device state bytes: %02x %02x\n",
data.device_status, data.finger_btn);
return -EINVAL;
}
return cyapa_gen3_event_process(cyapa, &data);
}
/*
* This function will be called in the cyapa_gen3_set_power_mode function,
* and it's known that it may failed in some situation after the set power
* mode command was sent. So this function is aimed to avoid the knwon
* and unwanted output I2C and data parse error messages.
*/
static int cyapa_gen3_try_poll_handler(struct cyapa *cyapa)
{
struct cyapa_reg_data data;
int ret;
ret = cyapa_read_block(cyapa, CYAPA_CMD_GROUP_DATA, (u8 *)&data);
if (ret != sizeof(data))
return -EINVAL;
if ((data.device_status & OP_STATUS_SRC) != OP_STATUS_SRC ||
(data.device_status & OP_STATUS_DEV) != CYAPA_DEV_NORMAL ||
(data.finger_btn & OP_DATA_VALID) != OP_DATA_VALID)
return -EINVAL;
return cyapa_gen3_event_process(cyapa, &data);
}
static int cyapa_gen3_initialize(struct cyapa *cyapa) { return 0; }
static int cyapa_gen3_bl_initiate(struct cyapa *cyapa,
const struct firmware *fw) { return 0; }
static int cyapa_gen3_empty_output_data(struct cyapa *cyapa,
u8 *buf, int *len, cb_sort func) { return 0; }
const struct cyapa_dev_ops cyapa_gen3_ops = {
.check_fw = cyapa_gen3_check_fw,
.bl_enter = cyapa_gen3_bl_enter,
.bl_activate = cyapa_gen3_bl_activate,
.update_fw = cyapa_gen3_do_fw_update,
.bl_deactivate = cyapa_gen3_bl_deactivate,
.bl_initiate = cyapa_gen3_bl_initiate,
.show_baseline = cyapa_gen3_show_baseline,
.calibrate_store = cyapa_gen3_do_calibrate,
.initialize = cyapa_gen3_initialize,
.state_parse = cyapa_gen3_state_parse,
.operational_check = cyapa_gen3_do_operational_check,
.irq_handler = cyapa_gen3_irq_handler,
.irq_cmd_handler = cyapa_gen3_irq_cmd_handler,
.sort_empty_output_data = cyapa_gen3_empty_output_data,
.set_power_mode = cyapa_gen3_set_power_mode,
.set_proximity = cyapa_gen3_set_proximity,
};
|
linux-master
|
drivers/input/mouse/cyapa_gen3.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Apple USB Touchpad (for post-February 2005 PowerBooks and MacBooks) driver
*
* Copyright (C) 2001-2004 Greg Kroah-Hartman ([email protected])
* Copyright (C) 2005-2008 Johannes Berg ([email protected])
* Copyright (C) 2005-2008 Stelian Pop ([email protected])
* Copyright (C) 2005 Frank Arnold ([email protected])
* Copyright (C) 2005 Peter Osterlund ([email protected])
* Copyright (C) 2005 Michael Hanselmann ([email protected])
* Copyright (C) 2006 Nicolas Boichat ([email protected])
* Copyright (C) 2007-2008 Sven Anders ([email protected])
*
* Thanks to Alex Harper <[email protected]> for his inputs.
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb/input.h>
/*
* Note: We try to keep the touchpad aspect ratio while still doing only
* simple arithmetics:
* 0 <= x <= (xsensors - 1) * xfact
* 0 <= y <= (ysensors - 1) * yfact
*/
struct atp_info {
int xsensors; /* number of X sensors */
int xsensors_17; /* 17" models have more sensors */
int ysensors; /* number of Y sensors */
int xfact; /* X multiplication factor */
int yfact; /* Y multiplication factor */
int datalen; /* size of USB transfers */
void (*callback)(struct urb *); /* callback function */
int fuzz; /* fuzz touchpad generates */
};
static void atp_complete_geyser_1_2(struct urb *urb);
static void atp_complete_geyser_3_4(struct urb *urb);
static const struct atp_info fountain_info = {
.xsensors = 16,
.xsensors_17 = 26,
.ysensors = 16,
.xfact = 64,
.yfact = 43,
.datalen = 81,
.callback = atp_complete_geyser_1_2,
.fuzz = 16,
};
static const struct atp_info geyser1_info = {
.xsensors = 16,
.xsensors_17 = 26,
.ysensors = 16,
.xfact = 64,
.yfact = 43,
.datalen = 81,
.callback = atp_complete_geyser_1_2,
.fuzz = 16,
};
static const struct atp_info geyser2_info = {
.xsensors = 15,
.xsensors_17 = 20,
.ysensors = 9,
.xfact = 64,
.yfact = 43,
.datalen = 64,
.callback = atp_complete_geyser_1_2,
.fuzz = 0,
};
static const struct atp_info geyser3_info = {
.xsensors = 20,
.ysensors = 10,
.xfact = 64,
.yfact = 64,
.datalen = 64,
.callback = atp_complete_geyser_3_4,
.fuzz = 0,
};
static const struct atp_info geyser4_info = {
.xsensors = 20,
.ysensors = 10,
.xfact = 64,
.yfact = 64,
.datalen = 64,
.callback = atp_complete_geyser_3_4,
.fuzz = 0,
};
#define ATP_DEVICE(prod, info) \
{ \
.match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
USB_DEVICE_ID_MATCH_INT_CLASS | \
USB_DEVICE_ID_MATCH_INT_PROTOCOL, \
.idVendor = 0x05ac, /* Apple */ \
.idProduct = (prod), \
.bInterfaceClass = 0x03, \
.bInterfaceProtocol = 0x02, \
.driver_info = (unsigned long) &info, \
}
/*
* Table of devices (Product IDs) that work with this driver.
* (The names come from Info.plist in AppleUSBTrackpad.kext,
* According to Info.plist Geyser IV is the same as Geyser III.)
*/
static const struct usb_device_id atp_table[] = {
/* PowerBooks Feb 2005, iBooks G4 */
ATP_DEVICE(0x020e, fountain_info), /* FOUNTAIN ANSI */
ATP_DEVICE(0x020f, fountain_info), /* FOUNTAIN ISO */
ATP_DEVICE(0x030a, fountain_info), /* FOUNTAIN TP ONLY */
ATP_DEVICE(0x030b, geyser1_info), /* GEYSER 1 TP ONLY */
/* PowerBooks Oct 2005 */
ATP_DEVICE(0x0214, geyser2_info), /* GEYSER 2 ANSI */
ATP_DEVICE(0x0215, geyser2_info), /* GEYSER 2 ISO */
ATP_DEVICE(0x0216, geyser2_info), /* GEYSER 2 JIS */
/* Core Duo MacBook & MacBook Pro */
ATP_DEVICE(0x0217, geyser3_info), /* GEYSER 3 ANSI */
ATP_DEVICE(0x0218, geyser3_info), /* GEYSER 3 ISO */
ATP_DEVICE(0x0219, geyser3_info), /* GEYSER 3 JIS */
/* Core2 Duo MacBook & MacBook Pro */
ATP_DEVICE(0x021a, geyser4_info), /* GEYSER 4 ANSI */
ATP_DEVICE(0x021b, geyser4_info), /* GEYSER 4 ISO */
ATP_DEVICE(0x021c, geyser4_info), /* GEYSER 4 JIS */
/* Core2 Duo MacBook3,1 */
ATP_DEVICE(0x0229, geyser4_info), /* GEYSER 4 HF ANSI */
ATP_DEVICE(0x022a, geyser4_info), /* GEYSER 4 HF ISO */
ATP_DEVICE(0x022b, geyser4_info), /* GEYSER 4 HF JIS */
/* Terminating entry */
{ }
};
MODULE_DEVICE_TABLE(usb, atp_table);
/* maximum number of sensors */
#define ATP_XSENSORS 26
#define ATP_YSENSORS 16
/*
* The largest possible bank of sensors with additional buffer of 4 extra values
* on either side, for an array of smoothed sensor values.
*/
#define ATP_SMOOTHSIZE 34
/* maximum pressure this driver will report */
#define ATP_PRESSURE 300
/*
* Threshold for the touchpad sensors. Any change less than ATP_THRESHOLD is
* ignored.
*/
#define ATP_THRESHOLD 5
/*
* How far we'll bitshift our sensor values before averaging them. Mitigates
* rounding errors.
*/
#define ATP_SCALE 12
/* Geyser initialization constants */
#define ATP_GEYSER_MODE_READ_REQUEST_ID 1
#define ATP_GEYSER_MODE_WRITE_REQUEST_ID 9
#define ATP_GEYSER_MODE_REQUEST_VALUE 0x300
#define ATP_GEYSER_MODE_REQUEST_INDEX 0
#define ATP_GEYSER_MODE_VENDOR_VALUE 0x04
/**
* enum atp_status_bits - status bit meanings
*
* These constants represent the meaning of the status bits.
* (only Geyser 3/4)
*
* @ATP_STATUS_BUTTON: The button was pressed
* @ATP_STATUS_BASE_UPDATE: Update of the base values (untouched pad)
* @ATP_STATUS_FROM_RESET: Reset previously performed
*/
enum atp_status_bits {
ATP_STATUS_BUTTON = BIT(0),
ATP_STATUS_BASE_UPDATE = BIT(2),
ATP_STATUS_FROM_RESET = BIT(4),
};
/* Structure to hold all of our device specific stuff */
struct atp {
char phys[64];
struct usb_device *udev; /* usb device */
struct usb_interface *intf; /* usb interface */
struct urb *urb; /* usb request block */
u8 *data; /* transferred data */
struct input_dev *input; /* input dev */
const struct atp_info *info; /* touchpad model */
bool open;
bool valid; /* are the samples valid? */
bool size_detect_done;
bool overflow_warned;
int fingers_old; /* last reported finger count */
int x_old; /* last reported x/y, */
int y_old; /* used for smoothing */
signed char xy_cur[ATP_XSENSORS + ATP_YSENSORS];
signed char xy_old[ATP_XSENSORS + ATP_YSENSORS];
int xy_acc[ATP_XSENSORS + ATP_YSENSORS];
int smooth[ATP_SMOOTHSIZE];
int smooth_tmp[ATP_SMOOTHSIZE];
int idlecount; /* number of empty packets */
struct work_struct work;
};
#define dbg_dump(msg, tab) \
if (debug > 1) { \
int __i; \
printk(KERN_DEBUG "appletouch: %s", msg); \
for (__i = 0; __i < ATP_XSENSORS + ATP_YSENSORS; __i++) \
printk(" %02x", tab[__i]); \
printk("\n"); \
}
#define dprintk(format, a...) \
do { \
if (debug) \
printk(KERN_DEBUG format, ##a); \
} while (0)
MODULE_AUTHOR("Johannes Berg");
MODULE_AUTHOR("Stelian Pop");
MODULE_AUTHOR("Frank Arnold");
MODULE_AUTHOR("Michael Hanselmann");
MODULE_AUTHOR("Sven Anders");
MODULE_DESCRIPTION("Apple PowerBook and MacBook USB touchpad driver");
MODULE_LICENSE("GPL");
/*
* Make the threshold a module parameter
*/
static int threshold = ATP_THRESHOLD;
module_param(threshold, int, 0644);
MODULE_PARM_DESC(threshold, "Discard any change in data from a sensor"
" (the trackpad has many of these sensors)"
" less than this value.");
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Activate debugging output");
/*
* By default newer Geyser devices send standard USB HID mouse
* packets (Report ID 2). This code changes device mode, so it
* sends raw sensor reports (Report ID 5).
*/
static int atp_geyser_init(struct atp *dev)
{
struct usb_device *udev = dev->udev;
char *data;
int size;
int i;
int ret;
data = kmalloc(8, GFP_KERNEL);
if (!data) {
dev_err(&dev->intf->dev, "Out of memory\n");
return -ENOMEM;
}
size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
ATP_GEYSER_MODE_READ_REQUEST_ID,
USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
ATP_GEYSER_MODE_REQUEST_VALUE,
ATP_GEYSER_MODE_REQUEST_INDEX, data, 8, 5000);
if (size != 8) {
dprintk("atp_geyser_init: read error\n");
for (i = 0; i < 8; i++)
dprintk("appletouch[%d]: %d\n", i, data[i]);
dev_err(&dev->intf->dev, "Failed to read mode from device.\n");
ret = -EIO;
goto out_free;
}
/* Apply the mode switch */
data[0] = ATP_GEYSER_MODE_VENDOR_VALUE;
size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
ATP_GEYSER_MODE_WRITE_REQUEST_ID,
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
ATP_GEYSER_MODE_REQUEST_VALUE,
ATP_GEYSER_MODE_REQUEST_INDEX, data, 8, 5000);
if (size != 8) {
dprintk("atp_geyser_init: write error\n");
for (i = 0; i < 8; i++)
dprintk("appletouch[%d]: %d\n", i, data[i]);
dev_err(&dev->intf->dev, "Failed to request geyser raw mode\n");
ret = -EIO;
goto out_free;
}
ret = 0;
out_free:
kfree(data);
return ret;
}
/*
* Reinitialise the device. This usually stops stream of empty packets
* coming from it.
*/
static void atp_reinit(struct work_struct *work)
{
struct atp *dev = container_of(work, struct atp, work);
int retval;
dprintk("appletouch: putting appletouch to sleep (reinit)\n");
atp_geyser_init(dev);
retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
if (retval)
dev_err(&dev->intf->dev,
"atp_reinit: usb_submit_urb failed with error %d\n",
retval);
}
static int atp_calculate_abs(struct atp *dev, int offset, int nb_sensors,
int fact, int *z, int *fingers)
{
int i, pass;
/*
* Use offset to point xy_sensors at the first value in dev->xy_acc
* for whichever dimension we're looking at this particular go-round.
*/
int *xy_sensors = dev->xy_acc + offset;
/* values to calculate mean */
int pcum = 0, psum = 0;
int is_increasing = 0;
*fingers = 0;
for (i = 0; i < nb_sensors; i++) {
if (xy_sensors[i] < threshold) {
if (is_increasing)
is_increasing = 0;
/*
* Makes the finger detection more versatile. For example,
* two fingers with no gap will be detected. Also, my
* tests show it less likely to have intermittent loss
* of multiple finger readings while moving around (scrolling).
*
* Changes the multiple finger detection to counting humps on
* sensors (transitions from nonincreasing to increasing)
* instead of counting transitions from low sensors (no
* finger reading) to high sensors (finger above
* sensor)
*
* - Jason Parekh <[email protected]>
*/
} else if (i < 1 ||
(!is_increasing && xy_sensors[i - 1] < xy_sensors[i])) {
(*fingers)++;
is_increasing = 1;
} else if (i > 0 && (xy_sensors[i - 1] - xy_sensors[i] > threshold)) {
is_increasing = 0;
}
}
if (*fingers < 1) /* No need to continue if no fingers are found. */
return 0;
/*
* Use a smoothed version of sensor data for movement calculations, to
* combat noise without needing to rely so heavily on a threshold.
* This improves tracking.
*
* The smoothed array is bigger than the original so that the smoothing
* doesn't result in edge values being truncated.
*/
memset(dev->smooth, 0, 4 * sizeof(dev->smooth[0]));
/* Pull base values, scaled up to help avoid truncation errors. */
for (i = 0; i < nb_sensors; i++)
dev->smooth[i + 4] = xy_sensors[i] << ATP_SCALE;
memset(&dev->smooth[nb_sensors + 4], 0, 4 * sizeof(dev->smooth[0]));
for (pass = 0; pass < 4; pass++) {
/* Handle edge. */
dev->smooth_tmp[0] = (dev->smooth[0] + dev->smooth[1]) / 2;
/* Average values with neighbors. */
for (i = 1; i < nb_sensors + 7; i++)
dev->smooth_tmp[i] = (dev->smooth[i - 1] +
dev->smooth[i] * 2 +
dev->smooth[i + 1]) / 4;
/* Handle other edge. */
dev->smooth_tmp[i] = (dev->smooth[i - 1] + dev->smooth[i]) / 2;
memcpy(dev->smooth, dev->smooth_tmp, sizeof(dev->smooth));
}
for (i = 0; i < nb_sensors + 8; i++) {
/*
* Skip values if they're small enough to be truncated to 0
* by scale. Mostly noise.
*/
if ((dev->smooth[i] >> ATP_SCALE) > 0) {
pcum += dev->smooth[i] * i;
psum += dev->smooth[i];
}
}
if (psum > 0) {
*z = psum >> ATP_SCALE; /* Scale down pressure output. */
return pcum * fact / psum;
}
return 0;
}
static inline void atp_report_fingers(struct input_dev *input, int fingers)
{
input_report_key(input, BTN_TOOL_FINGER, fingers == 1);
input_report_key(input, BTN_TOOL_DOUBLETAP, fingers == 2);
input_report_key(input, BTN_TOOL_TRIPLETAP, fingers > 2);
}
/* Check URB status and for correct length of data package */
#define ATP_URB_STATUS_SUCCESS 0
#define ATP_URB_STATUS_ERROR 1
#define ATP_URB_STATUS_ERROR_FATAL 2
static int atp_status_check(struct urb *urb)
{
struct atp *dev = urb->context;
struct usb_interface *intf = dev->intf;
switch (urb->status) {
case 0:
/* success */
break;
case -EOVERFLOW:
if (!dev->overflow_warned) {
dev_warn(&intf->dev,
"appletouch: OVERFLOW with data length %d, actual length is %d\n",
dev->info->datalen, dev->urb->actual_length);
dev->overflow_warned = true;
}
fallthrough;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/* This urb is terminated, clean up */
dev_dbg(&intf->dev,
"atp_complete: urb shutting down with status: %d\n",
urb->status);
return ATP_URB_STATUS_ERROR_FATAL;
default:
dev_dbg(&intf->dev,
"atp_complete: nonzero urb status received: %d\n",
urb->status);
return ATP_URB_STATUS_ERROR;
}
/* drop incomplete datasets */
if (dev->urb->actual_length != dev->info->datalen) {
dprintk("appletouch: incomplete data package"
" (first byte: %d, length: %d).\n",
dev->data[0], dev->urb->actual_length);
return ATP_URB_STATUS_ERROR;
}
return ATP_URB_STATUS_SUCCESS;
}
static void atp_detect_size(struct atp *dev)
{
int i;
/* 17" Powerbooks have extra X sensors */
for (i = dev->info->xsensors; i < ATP_XSENSORS; i++) {
if (dev->xy_cur[i]) {
dev_info(&dev->intf->dev,
"appletouch: 17\" model detected.\n");
input_set_abs_params(dev->input, ABS_X, 0,
(dev->info->xsensors_17 - 1) *
dev->info->xfact - 1,
dev->info->fuzz, 0);
break;
}
}
}
/*
* USB interrupt callback functions
*/
/* Interrupt function for older touchpads: FOUNTAIN/GEYSER1/GEYSER2 */
static void atp_complete_geyser_1_2(struct urb *urb)
{
int x, y, x_z, y_z, x_f, y_f;
int retval, i, j;
int key, fingers;
struct atp *dev = urb->context;
int status = atp_status_check(urb);
if (status == ATP_URB_STATUS_ERROR_FATAL)
return;
else if (status == ATP_URB_STATUS_ERROR)
goto exit;
/* reorder the sensors values */
if (dev->info == &geyser2_info) {
memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
/*
* The values are laid out like this:
* Y1, Y2, -, Y3, Y4, -, ..., X1, X2, -, X3, X4, -, ...
* '-' is an unused value.
*/
/* read X values */
for (i = 0, j = 19; i < 20; i += 2, j += 3) {
dev->xy_cur[i] = dev->data[j];
dev->xy_cur[i + 1] = dev->data[j + 1];
}
/* read Y values */
for (i = 0, j = 1; i < 9; i += 2, j += 3) {
dev->xy_cur[ATP_XSENSORS + i] = dev->data[j];
dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 1];
}
} else {
for (i = 0; i < 8; i++) {
/* X values */
dev->xy_cur[i + 0] = dev->data[5 * i + 2];
dev->xy_cur[i + 8] = dev->data[5 * i + 4];
dev->xy_cur[i + 16] = dev->data[5 * i + 42];
if (i < 2)
dev->xy_cur[i + 24] = dev->data[5 * i + 44];
/* Y values */
dev->xy_cur[ATP_XSENSORS + i] = dev->data[5 * i + 1];
dev->xy_cur[ATP_XSENSORS + i + 8] = dev->data[5 * i + 3];
}
}
dbg_dump("sample", dev->xy_cur);
if (!dev->valid) {
/* first sample */
dev->valid = true;
dev->x_old = dev->y_old = -1;
/* Store first sample */
memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
/* Perform size detection, if not done already */
if (unlikely(!dev->size_detect_done)) {
atp_detect_size(dev);
dev->size_detect_done = true;
goto exit;
}
}
for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) {
/* accumulate the change */
signed char change = dev->xy_old[i] - dev->xy_cur[i];
dev->xy_acc[i] -= change;
/* prevent down drifting */
if (dev->xy_acc[i] < 0)
dev->xy_acc[i] = 0;
}
memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
dbg_dump("accumulator", dev->xy_acc);
x = atp_calculate_abs(dev, 0, ATP_XSENSORS,
dev->info->xfact, &x_z, &x_f);
y = atp_calculate_abs(dev, ATP_XSENSORS, ATP_YSENSORS,
dev->info->yfact, &y_z, &y_f);
key = dev->data[dev->info->datalen - 1] & ATP_STATUS_BUTTON;
fingers = max(x_f, y_f);
if (x && y && fingers == dev->fingers_old) {
if (dev->x_old != -1) {
x = (dev->x_old * 7 + x) >> 3;
y = (dev->y_old * 7 + y) >> 3;
dev->x_old = x;
dev->y_old = y;
if (debug > 1)
printk(KERN_DEBUG "appletouch: "
"X: %3d Y: %3d Xz: %3d Yz: %3d\n",
x, y, x_z, y_z);
input_report_key(dev->input, BTN_TOUCH, 1);
input_report_abs(dev->input, ABS_X, x);
input_report_abs(dev->input, ABS_Y, y);
input_report_abs(dev->input, ABS_PRESSURE,
min(ATP_PRESSURE, x_z + y_z));
atp_report_fingers(dev->input, fingers);
}
dev->x_old = x;
dev->y_old = y;
} else if (!x && !y) {
dev->x_old = dev->y_old = -1;
dev->fingers_old = 0;
input_report_key(dev->input, BTN_TOUCH, 0);
input_report_abs(dev->input, ABS_PRESSURE, 0);
atp_report_fingers(dev->input, 0);
/* reset the accumulator on release */
memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
}
if (fingers != dev->fingers_old)
dev->x_old = dev->y_old = -1;
dev->fingers_old = fingers;
input_report_key(dev->input, BTN_LEFT, key);
input_sync(dev->input);
exit:
retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
if (retval)
dev_err(&dev->intf->dev,
"atp_complete: usb_submit_urb failed with result %d\n",
retval);
}
/* Interrupt function for older touchpads: GEYSER3/GEYSER4 */
static void atp_complete_geyser_3_4(struct urb *urb)
{
int x, y, x_z, y_z, x_f, y_f;
int retval, i, j;
int key, fingers;
struct atp *dev = urb->context;
int status = atp_status_check(urb);
if (status == ATP_URB_STATUS_ERROR_FATAL)
return;
else if (status == ATP_URB_STATUS_ERROR)
goto exit;
/* Reorder the sensors values:
*
* The values are laid out like this:
* -, Y1, Y2, -, Y3, Y4, -, ..., -, X1, X2, -, X3, X4, ...
* '-' is an unused value.
*/
/* read X values */
for (i = 0, j = 19; i < 20; i += 2, j += 3) {
dev->xy_cur[i] = dev->data[j + 1];
dev->xy_cur[i + 1] = dev->data[j + 2];
}
/* read Y values */
for (i = 0, j = 1; i < 9; i += 2, j += 3) {
dev->xy_cur[ATP_XSENSORS + i] = dev->data[j + 1];
dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 2];
}
dbg_dump("sample", dev->xy_cur);
/* Just update the base values (i.e. touchpad in untouched state) */
if (dev->data[dev->info->datalen - 1] & ATP_STATUS_BASE_UPDATE) {
dprintk("appletouch: updated base values\n");
memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
goto exit;
}
for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) {
/* calculate the change */
dev->xy_acc[i] = dev->xy_cur[i] - dev->xy_old[i];
/* this is a round-robin value, so couple with that */
if (dev->xy_acc[i] > 127)
dev->xy_acc[i] -= 256;
if (dev->xy_acc[i] < -127)
dev->xy_acc[i] += 256;
/* prevent down drifting */
if (dev->xy_acc[i] < 0)
dev->xy_acc[i] = 0;
}
dbg_dump("accumulator", dev->xy_acc);
x = atp_calculate_abs(dev, 0, ATP_XSENSORS,
dev->info->xfact, &x_z, &x_f);
y = atp_calculate_abs(dev, ATP_XSENSORS, ATP_YSENSORS,
dev->info->yfact, &y_z, &y_f);
key = dev->data[dev->info->datalen - 1] & ATP_STATUS_BUTTON;
fingers = max(x_f, y_f);
if (x && y && fingers == dev->fingers_old) {
if (dev->x_old != -1) {
x = (dev->x_old * 7 + x) >> 3;
y = (dev->y_old * 7 + y) >> 3;
dev->x_old = x;
dev->y_old = y;
if (debug > 1)
printk(KERN_DEBUG "appletouch: X: %3d Y: %3d "
"Xz: %3d Yz: %3d\n",
x, y, x_z, y_z);
input_report_key(dev->input, BTN_TOUCH, 1);
input_report_abs(dev->input, ABS_X, x);
input_report_abs(dev->input, ABS_Y, y);
input_report_abs(dev->input, ABS_PRESSURE,
min(ATP_PRESSURE, x_z + y_z));
atp_report_fingers(dev->input, fingers);
}
dev->x_old = x;
dev->y_old = y;
} else if (!x && !y) {
dev->x_old = dev->y_old = -1;
dev->fingers_old = 0;
input_report_key(dev->input, BTN_TOUCH, 0);
input_report_abs(dev->input, ABS_PRESSURE, 0);
atp_report_fingers(dev->input, 0);
/* reset the accumulator on release */
memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
}
if (fingers != dev->fingers_old)
dev->x_old = dev->y_old = -1;
dev->fingers_old = fingers;
input_report_key(dev->input, BTN_LEFT, key);
input_sync(dev->input);
/*
* Geysers 3/4 will continue to send packets continually after
* the first touch unless reinitialised. Do so if it's been
* idle for a while in order to avoid waking the kernel up
* several hundred times a second.
*/
/*
* Button must not be pressed when entering suspend,
* otherwise we will never release the button.
*/
if (!x && !y && !key) {
dev->idlecount++;
if (dev->idlecount == 10) {
dev->x_old = dev->y_old = -1;
dev->idlecount = 0;
schedule_work(&dev->work);
/* Don't resubmit urb here, wait for reinit */
return;
}
} else
dev->idlecount = 0;
exit:
retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
if (retval)
dev_err(&dev->intf->dev,
"atp_complete: usb_submit_urb failed with result %d\n",
retval);
}
static int atp_open(struct input_dev *input)
{
struct atp *dev = input_get_drvdata(input);
if (usb_submit_urb(dev->urb, GFP_KERNEL))
return -EIO;
dev->open = true;
return 0;
}
static void atp_close(struct input_dev *input)
{
struct atp *dev = input_get_drvdata(input);
usb_kill_urb(dev->urb);
cancel_work_sync(&dev->work);
dev->open = false;
}
static int atp_handle_geyser(struct atp *dev)
{
if (dev->info != &fountain_info) {
/* switch to raw sensor mode */
if (atp_geyser_init(dev))
return -EIO;
dev_info(&dev->intf->dev, "Geyser mode initialized.\n");
}
return 0;
}
static int atp_probe(struct usb_interface *iface,
const struct usb_device_id *id)
{
struct atp *dev;
struct input_dev *input_dev;
struct usb_device *udev = interface_to_usbdev(iface);
struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
int int_in_endpointAddr = 0;
int i, error = -ENOMEM;
const struct atp_info *info = (const struct atp_info *)id->driver_info;
/* set up the endpoint information */
/* use only the first interrupt-in endpoint */
iface_desc = iface->cur_altsetting;
for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
endpoint = &iface_desc->endpoint[i].desc;
if (!int_in_endpointAddr && usb_endpoint_is_int_in(endpoint)) {
/* we found an interrupt in endpoint */
int_in_endpointAddr = endpoint->bEndpointAddress;
break;
}
}
if (!int_in_endpointAddr) {
dev_err(&iface->dev, "Could not find int-in endpoint\n");
return -EIO;
}
/* allocate memory for our device state and initialize it */
dev = kzalloc(sizeof(struct atp), GFP_KERNEL);
input_dev = input_allocate_device();
if (!dev || !input_dev) {
dev_err(&iface->dev, "Out of memory\n");
goto err_free_devs;
}
dev->udev = udev;
dev->intf = iface;
dev->input = input_dev;
dev->info = info;
dev->overflow_warned = false;
dev->urb = usb_alloc_urb(0, GFP_KERNEL);
if (!dev->urb)
goto err_free_devs;
dev->data = usb_alloc_coherent(dev->udev, dev->info->datalen, GFP_KERNEL,
&dev->urb->transfer_dma);
if (!dev->data)
goto err_free_urb;
usb_fill_int_urb(dev->urb, udev,
usb_rcvintpipe(udev, int_in_endpointAddr),
dev->data, dev->info->datalen,
dev->info->callback, dev, 1);
error = atp_handle_geyser(dev);
if (error)
goto err_free_buffer;
usb_make_path(udev, dev->phys, sizeof(dev->phys));
strlcat(dev->phys, "/input0", sizeof(dev->phys));
input_dev->name = "appletouch";
input_dev->phys = dev->phys;
usb_to_input_id(dev->udev, &input_dev->id);
input_dev->dev.parent = &iface->dev;
input_set_drvdata(input_dev, dev);
input_dev->open = atp_open;
input_dev->close = atp_close;
set_bit(EV_ABS, input_dev->evbit);
input_set_abs_params(input_dev, ABS_X, 0,
(dev->info->xsensors - 1) * dev->info->xfact - 1,
dev->info->fuzz, 0);
input_set_abs_params(input_dev, ABS_Y, 0,
(dev->info->ysensors - 1) * dev->info->yfact - 1,
dev->info->fuzz, 0);
input_set_abs_params(input_dev, ABS_PRESSURE, 0, ATP_PRESSURE, 0, 0);
set_bit(EV_KEY, input_dev->evbit);
set_bit(BTN_TOUCH, input_dev->keybit);
set_bit(BTN_TOOL_FINGER, input_dev->keybit);
set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
set_bit(BTN_LEFT, input_dev->keybit);
INIT_WORK(&dev->work, atp_reinit);
error = input_register_device(dev->input);
if (error)
goto err_free_buffer;
/* save our data pointer in this interface device */
usb_set_intfdata(iface, dev);
return 0;
err_free_buffer:
usb_free_coherent(dev->udev, dev->info->datalen,
dev->data, dev->urb->transfer_dma);
err_free_urb:
usb_free_urb(dev->urb);
err_free_devs:
usb_set_intfdata(iface, NULL);
kfree(dev);
input_free_device(input_dev);
return error;
}
static void atp_disconnect(struct usb_interface *iface)
{
struct atp *dev = usb_get_intfdata(iface);
usb_set_intfdata(iface, NULL);
if (dev) {
usb_kill_urb(dev->urb);
input_unregister_device(dev->input);
usb_free_coherent(dev->udev, dev->info->datalen,
dev->data, dev->urb->transfer_dma);
usb_free_urb(dev->urb);
kfree(dev);
}
dev_info(&iface->dev, "input: appletouch disconnected\n");
}
static int atp_recover(struct atp *dev)
{
int error;
error = atp_handle_geyser(dev);
if (error)
return error;
if (dev->open && usb_submit_urb(dev->urb, GFP_KERNEL))
return -EIO;
return 0;
}
static int atp_suspend(struct usb_interface *iface, pm_message_t message)
{
struct atp *dev = usb_get_intfdata(iface);
usb_kill_urb(dev->urb);
return 0;
}
static int atp_resume(struct usb_interface *iface)
{
struct atp *dev = usb_get_intfdata(iface);
if (dev->open && usb_submit_urb(dev->urb, GFP_KERNEL))
return -EIO;
return 0;
}
static int atp_reset_resume(struct usb_interface *iface)
{
struct atp *dev = usb_get_intfdata(iface);
return atp_recover(dev);
}
static struct usb_driver atp_driver = {
.name = "appletouch",
.probe = atp_probe,
.disconnect = atp_disconnect,
.suspend = atp_suspend,
.resume = atp_resume,
.reset_resume = atp_reset_resume,
.id_table = atp_table,
};
module_usb_driver(atp_driver);
|
linux-master
|
drivers/input/mouse/appletouch.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Apple USB BCM5974 (Macbook Air and Penryn Macbook Pro) multitouch driver
*
* Copyright (C) 2008 Henrik Rydberg ([email protected])
* Copyright (C) 2015 John Horan ([email protected])
*
* The USB initialization and package decoding was made by
* Scott Shawcroft as part of the touchd user-space driver project:
* Copyright (C) 2008 Scott Shawcroft ([email protected])
*
* The BCM5974 driver is based on the appletouch driver:
* Copyright (C) 2001-2004 Greg Kroah-Hartman ([email protected])
* Copyright (C) 2005 Johannes Berg ([email protected])
* Copyright (C) 2005 Stelian Pop ([email protected])
* Copyright (C) 2005 Frank Arnold ([email protected])
* Copyright (C) 2005 Peter Osterlund ([email protected])
* Copyright (C) 2005 Michael Hanselmann ([email protected])
* Copyright (C) 2006 Nicolas Boichat ([email protected])
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb/input.h>
#include <linux/hid.h>
#include <linux/mutex.h>
#include <linux/input/mt.h>
#define USB_VENDOR_ID_APPLE 0x05ac
/* MacbookAir, aka wellspring */
#define USB_DEVICE_ID_APPLE_WELLSPRING_ANSI 0x0223
#define USB_DEVICE_ID_APPLE_WELLSPRING_ISO 0x0224
#define USB_DEVICE_ID_APPLE_WELLSPRING_JIS 0x0225
/* MacbookProPenryn, aka wellspring2 */
#define USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI 0x0230
#define USB_DEVICE_ID_APPLE_WELLSPRING2_ISO 0x0231
#define USB_DEVICE_ID_APPLE_WELLSPRING2_JIS 0x0232
/* Macbook5,1 (unibody), aka wellspring3 */
#define USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI 0x0236
#define USB_DEVICE_ID_APPLE_WELLSPRING3_ISO 0x0237
#define USB_DEVICE_ID_APPLE_WELLSPRING3_JIS 0x0238
/* MacbookAir3,2 (unibody), aka wellspring5 */
#define USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI 0x023f
#define USB_DEVICE_ID_APPLE_WELLSPRING4_ISO 0x0240
#define USB_DEVICE_ID_APPLE_WELLSPRING4_JIS 0x0241
/* MacbookAir3,1 (unibody), aka wellspring4 */
#define USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI 0x0242
#define USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO 0x0243
#define USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS 0x0244
/* Macbook8 (unibody, March 2011) */
#define USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI 0x0245
#define USB_DEVICE_ID_APPLE_WELLSPRING5_ISO 0x0246
#define USB_DEVICE_ID_APPLE_WELLSPRING5_JIS 0x0247
/* MacbookAir4,1 (unibody, July 2011) */
#define USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI 0x0249
#define USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO 0x024a
#define USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS 0x024b
/* MacbookAir4,2 (unibody, July 2011) */
#define USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI 0x024c
#define USB_DEVICE_ID_APPLE_WELLSPRING6_ISO 0x024d
#define USB_DEVICE_ID_APPLE_WELLSPRING6_JIS 0x024e
/* Macbook8,2 (unibody) */
#define USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI 0x0252
#define USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO 0x0253
#define USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS 0x0254
/* MacbookPro10,1 (unibody, June 2012) */
#define USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI 0x0262
#define USB_DEVICE_ID_APPLE_WELLSPRING7_ISO 0x0263
#define USB_DEVICE_ID_APPLE_WELLSPRING7_JIS 0x0264
/* MacbookPro10,2 (unibody, October 2012) */
#define USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI 0x0259
#define USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO 0x025a
#define USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS 0x025b
/* MacbookAir6,2 (unibody, June 2013) */
#define USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI 0x0290
#define USB_DEVICE_ID_APPLE_WELLSPRING8_ISO 0x0291
#define USB_DEVICE_ID_APPLE_WELLSPRING8_JIS 0x0292
/* MacbookPro12,1 (2015) */
#define USB_DEVICE_ID_APPLE_WELLSPRING9_ANSI 0x0272
#define USB_DEVICE_ID_APPLE_WELLSPRING9_ISO 0x0273
#define USB_DEVICE_ID_APPLE_WELLSPRING9_JIS 0x0274
#define BCM5974_DEVICE(prod) { \
.match_flags = (USB_DEVICE_ID_MATCH_DEVICE | \
USB_DEVICE_ID_MATCH_INT_CLASS | \
USB_DEVICE_ID_MATCH_INT_PROTOCOL), \
.idVendor = USB_VENDOR_ID_APPLE, \
.idProduct = (prod), \
.bInterfaceClass = USB_INTERFACE_CLASS_HID, \
.bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE \
}
/* table of devices that work with this driver */
static const struct usb_device_id bcm5974_table[] = {
/* MacbookAir1.1 */
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ANSI),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ISO),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_JIS),
/* MacbookProPenryn */
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ISO),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_JIS),
/* Macbook5,1 */
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ISO),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_JIS),
/* MacbookAir3,2 */
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_ISO),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_JIS),
/* MacbookAir3,1 */
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS),
/* MacbookPro8 */
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_ISO),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_JIS),
/* MacbookAir4,1 */
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS),
/* MacbookAir4,2 */
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6_ISO),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6_JIS),
/* MacbookPro8,2 */
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS),
/* MacbookPro10,1 */
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7_ISO),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7_JIS),
/* MacbookPro10,2 */
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS),
/* MacbookAir6,2 */
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING8_ISO),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING8_JIS),
/* MacbookPro12,1 */
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING9_ANSI),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING9_ISO),
BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING9_JIS),
/* Terminating entry */
{}
};
MODULE_DEVICE_TABLE(usb, bcm5974_table);
MODULE_AUTHOR("Henrik Rydberg");
MODULE_DESCRIPTION("Apple USB BCM5974 multitouch driver");
MODULE_LICENSE("GPL");
#define dprintk(level, format, a...)\
{ if (debug >= level) printk(KERN_DEBUG format, ##a); }
static int debug = 1;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Activate debugging output");
/* button data structure */
struct bt_data {
u8 unknown1; /* constant */
u8 button; /* left button */
u8 rel_x; /* relative x coordinate */
u8 rel_y; /* relative y coordinate */
};
/* trackpad header types */
enum tp_type {
TYPE1, /* plain trackpad */
TYPE2, /* button integrated in trackpad */
TYPE3, /* additional header fields since June 2013 */
TYPE4 /* additional header field for pressure data */
};
/* trackpad finger data offsets, le16-aligned */
#define HEADER_TYPE1 (13 * sizeof(__le16))
#define HEADER_TYPE2 (15 * sizeof(__le16))
#define HEADER_TYPE3 (19 * sizeof(__le16))
#define HEADER_TYPE4 (23 * sizeof(__le16))
/* trackpad button data offsets */
#define BUTTON_TYPE1 0
#define BUTTON_TYPE2 15
#define BUTTON_TYPE3 23
#define BUTTON_TYPE4 31
/* list of device capability bits */
#define HAS_INTEGRATED_BUTTON 1
/* trackpad finger data block size */
#define FSIZE_TYPE1 (14 * sizeof(__le16))
#define FSIZE_TYPE2 (14 * sizeof(__le16))
#define FSIZE_TYPE3 (14 * sizeof(__le16))
#define FSIZE_TYPE4 (15 * sizeof(__le16))
/* offset from header to finger struct */
#define DELTA_TYPE1 (0 * sizeof(__le16))
#define DELTA_TYPE2 (0 * sizeof(__le16))
#define DELTA_TYPE3 (0 * sizeof(__le16))
#define DELTA_TYPE4 (1 * sizeof(__le16))
/* usb control message mode switch data */
#define USBMSG_TYPE1 8, 0x300, 0, 0, 0x1, 0x8
#define USBMSG_TYPE2 8, 0x300, 0, 0, 0x1, 0x8
#define USBMSG_TYPE3 8, 0x300, 0, 0, 0x1, 0x8
#define USBMSG_TYPE4 2, 0x302, 2, 1, 0x1, 0x0
/* Wellspring initialization constants */
#define BCM5974_WELLSPRING_MODE_READ_REQUEST_ID 1
#define BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID 9
/* trackpad finger structure, le16-aligned */
struct tp_finger {
__le16 origin; /* zero when switching track finger */
__le16 abs_x; /* absolute x coodinate */
__le16 abs_y; /* absolute y coodinate */
__le16 rel_x; /* relative x coodinate */
__le16 rel_y; /* relative y coodinate */
__le16 tool_major; /* tool area, major axis */
__le16 tool_minor; /* tool area, minor axis */
__le16 orientation; /* 16384 when point, else 15 bit angle */
__le16 touch_major; /* touch area, major axis */
__le16 touch_minor; /* touch area, minor axis */
__le16 unused[2]; /* zeros */
__le16 pressure; /* pressure on forcetouch touchpad */
__le16 multi; /* one finger: varies, more fingers: constant */
} __attribute__((packed,aligned(2)));
/* trackpad finger data size, empirically at least ten fingers */
#define MAX_FINGERS 16
#define MAX_FINGER_ORIENTATION 16384
/* device-specific parameters */
struct bcm5974_param {
int snratio; /* signal-to-noise ratio */
int min; /* device minimum reading */
int max; /* device maximum reading */
};
/* device-specific configuration */
struct bcm5974_config {
int ansi, iso, jis; /* the product id of this device */
int caps; /* device capability bitmask */
int bt_ep; /* the endpoint of the button interface */
int bt_datalen; /* data length of the button interface */
int tp_ep; /* the endpoint of the trackpad interface */
enum tp_type tp_type; /* type of trackpad interface */
int tp_header; /* bytes in header block */
int tp_datalen; /* data length of the trackpad interface */
int tp_button; /* offset to button data */
int tp_fsize; /* bytes in single finger block */
int tp_delta; /* offset from header to finger struct */
int um_size; /* usb control message length */
int um_req_val; /* usb control message value */
int um_req_idx; /* usb control message index */
int um_switch_idx; /* usb control message mode switch index */
int um_switch_on; /* usb control message mode switch on */
int um_switch_off; /* usb control message mode switch off */
struct bcm5974_param p; /* finger pressure limits */
struct bcm5974_param w; /* finger width limits */
struct bcm5974_param x; /* horizontal limits */
struct bcm5974_param y; /* vertical limits */
struct bcm5974_param o; /* orientation limits */
};
/* logical device structure */
struct bcm5974 {
char phys[64];
struct usb_device *udev; /* usb device */
struct usb_interface *intf; /* our interface */
struct input_dev *input; /* input dev */
struct bcm5974_config cfg; /* device configuration */
struct mutex pm_mutex; /* serialize access to open/suspend */
int opened; /* 1: opened, 0: closed */
struct urb *bt_urb; /* button usb request block */
struct bt_data *bt_data; /* button transferred data */
struct urb *tp_urb; /* trackpad usb request block */
u8 *tp_data; /* trackpad transferred data */
const struct tp_finger *index[MAX_FINGERS]; /* finger index data */
struct input_mt_pos pos[MAX_FINGERS]; /* position array */
int slots[MAX_FINGERS]; /* slot assignments */
};
/* trackpad finger block data, le16-aligned */
static const struct tp_finger *get_tp_finger(const struct bcm5974 *dev, int i)
{
const struct bcm5974_config *c = &dev->cfg;
u8 *f_base = dev->tp_data + c->tp_header + c->tp_delta;
return (const struct tp_finger *)(f_base + i * c->tp_fsize);
}
#define DATAFORMAT(type) \
type, \
HEADER_##type, \
HEADER_##type + (MAX_FINGERS) * (FSIZE_##type), \
BUTTON_##type, \
FSIZE_##type, \
DELTA_##type, \
USBMSG_##type
/* logical signal quality */
#define SN_PRESSURE 45 /* pressure signal-to-noise ratio */
#define SN_WIDTH 25 /* width signal-to-noise ratio */
#define SN_COORD 250 /* coordinate signal-to-noise ratio */
#define SN_ORIENT 10 /* orientation signal-to-noise ratio */
/* device constants */
static const struct bcm5974_config bcm5974_config_table[] = {
{
USB_DEVICE_ID_APPLE_WELLSPRING_ANSI,
USB_DEVICE_ID_APPLE_WELLSPRING_ISO,
USB_DEVICE_ID_APPLE_WELLSPRING_JIS,
0,
0x84, sizeof(struct bt_data),
0x81, DATAFORMAT(TYPE1),
{ SN_PRESSURE, 0, 256 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4824, 5342 },
{ SN_COORD, -172, 5820 },
{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
},
{
USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI,
USB_DEVICE_ID_APPLE_WELLSPRING2_ISO,
USB_DEVICE_ID_APPLE_WELLSPRING2_JIS,
0,
0x84, sizeof(struct bt_data),
0x81, DATAFORMAT(TYPE1),
{ SN_PRESSURE, 0, 256 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4824, 4824 },
{ SN_COORD, -172, 4290 },
{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
},
{
USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI,
USB_DEVICE_ID_APPLE_WELLSPRING3_ISO,
USB_DEVICE_ID_APPLE_WELLSPRING3_JIS,
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, DATAFORMAT(TYPE2),
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4460, 5166 },
{ SN_COORD, -75, 6700 },
{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
},
{
USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI,
USB_DEVICE_ID_APPLE_WELLSPRING4_ISO,
USB_DEVICE_ID_APPLE_WELLSPRING4_JIS,
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, DATAFORMAT(TYPE2),
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4620, 5140 },
{ SN_COORD, -150, 6600 },
{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
},
{
USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI,
USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO,
USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS,
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, DATAFORMAT(TYPE2),
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4616, 5112 },
{ SN_COORD, -142, 5234 },
{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
},
{
USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI,
USB_DEVICE_ID_APPLE_WELLSPRING5_ISO,
USB_DEVICE_ID_APPLE_WELLSPRING5_JIS,
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, DATAFORMAT(TYPE2),
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4415, 5050 },
{ SN_COORD, -55, 6680 },
{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
},
{
USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI,
USB_DEVICE_ID_APPLE_WELLSPRING6_ISO,
USB_DEVICE_ID_APPLE_WELLSPRING6_JIS,
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, DATAFORMAT(TYPE2),
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4620, 5140 },
{ SN_COORD, -150, 6600 },
{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
},
{
USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI,
USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO,
USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS,
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, DATAFORMAT(TYPE2),
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4750, 5280 },
{ SN_COORD, -150, 6730 },
{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
},
{
USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI,
USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO,
USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS,
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, DATAFORMAT(TYPE2),
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4620, 5140 },
{ SN_COORD, -150, 6600 },
{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
},
{
USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI,
USB_DEVICE_ID_APPLE_WELLSPRING7_ISO,
USB_DEVICE_ID_APPLE_WELLSPRING7_JIS,
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, DATAFORMAT(TYPE2),
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4750, 5280 },
{ SN_COORD, -150, 6730 },
{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
},
{
USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI,
USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO,
USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS,
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, DATAFORMAT(TYPE2),
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4750, 5280 },
{ SN_COORD, -150, 6730 },
{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
},
{
USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI,
USB_DEVICE_ID_APPLE_WELLSPRING8_ISO,
USB_DEVICE_ID_APPLE_WELLSPRING8_JIS,
HAS_INTEGRATED_BUTTON,
0, sizeof(struct bt_data),
0x83, DATAFORMAT(TYPE3),
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4620, 5140 },
{ SN_COORD, -150, 6600 },
{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
},
{
USB_DEVICE_ID_APPLE_WELLSPRING9_ANSI,
USB_DEVICE_ID_APPLE_WELLSPRING9_ISO,
USB_DEVICE_ID_APPLE_WELLSPRING9_JIS,
HAS_INTEGRATED_BUTTON,
0, sizeof(struct bt_data),
0x83, DATAFORMAT(TYPE4),
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4828, 5345 },
{ SN_COORD, -203, 6803 },
{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
},
{}
};
/* return the device-specific configuration by device */
static const struct bcm5974_config *bcm5974_get_config(struct usb_device *udev)
{
u16 id = le16_to_cpu(udev->descriptor.idProduct);
const struct bcm5974_config *cfg;
for (cfg = bcm5974_config_table; cfg->ansi; ++cfg)
if (cfg->ansi == id || cfg->iso == id || cfg->jis == id)
return cfg;
return bcm5974_config_table;
}
/* convert 16-bit little endian to signed integer */
static inline int raw2int(__le16 x)
{
return (signed short)le16_to_cpu(x);
}
static void set_abs(struct input_dev *input, unsigned int code,
const struct bcm5974_param *p)
{
int fuzz = p->snratio ? (p->max - p->min) / p->snratio : 0;
input_set_abs_params(input, code, p->min, p->max, fuzz, 0);
}
/* setup which logical events to report */
static void setup_events_to_report(struct input_dev *input_dev,
const struct bcm5974_config *cfg)
{
__set_bit(EV_ABS, input_dev->evbit);
/* for synaptics only */
input_set_abs_params(input_dev, ABS_PRESSURE, 0, 256, 5, 0);
input_set_abs_params(input_dev, ABS_TOOL_WIDTH, 0, 16, 0, 0);
/* finger touch area */
set_abs(input_dev, ABS_MT_TOUCH_MAJOR, &cfg->w);
set_abs(input_dev, ABS_MT_TOUCH_MINOR, &cfg->w);
/* finger approach area */
set_abs(input_dev, ABS_MT_WIDTH_MAJOR, &cfg->w);
set_abs(input_dev, ABS_MT_WIDTH_MINOR, &cfg->w);
/* finger orientation */
set_abs(input_dev, ABS_MT_ORIENTATION, &cfg->o);
/* finger position */
set_abs(input_dev, ABS_MT_POSITION_X, &cfg->x);
set_abs(input_dev, ABS_MT_POSITION_Y, &cfg->y);
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(BTN_LEFT, input_dev->keybit);
if (cfg->caps & HAS_INTEGRATED_BUTTON)
__set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
input_mt_init_slots(input_dev, MAX_FINGERS,
INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK);
}
/* report button data as logical button state */
static int report_bt_state(struct bcm5974 *dev, int size)
{
if (size != sizeof(struct bt_data))
return -EIO;
dprintk(7,
"bcm5974: button data: %x %x %x %x\n",
dev->bt_data->unknown1, dev->bt_data->button,
dev->bt_data->rel_x, dev->bt_data->rel_y);
input_report_key(dev->input, BTN_LEFT, dev->bt_data->button);
input_sync(dev->input);
return 0;
}
static void report_finger_data(struct input_dev *input, int slot,
const struct input_mt_pos *pos,
const struct tp_finger *f)
{
input_mt_slot(input, slot);
input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
input_report_abs(input, ABS_MT_TOUCH_MAJOR,
raw2int(f->touch_major) << 1);
input_report_abs(input, ABS_MT_TOUCH_MINOR,
raw2int(f->touch_minor) << 1);
input_report_abs(input, ABS_MT_WIDTH_MAJOR,
raw2int(f->tool_major) << 1);
input_report_abs(input, ABS_MT_WIDTH_MINOR,
raw2int(f->tool_minor) << 1);
input_report_abs(input, ABS_MT_ORIENTATION,
MAX_FINGER_ORIENTATION - raw2int(f->orientation));
input_report_abs(input, ABS_MT_POSITION_X, pos->x);
input_report_abs(input, ABS_MT_POSITION_Y, pos->y);
}
static void report_synaptics_data(struct input_dev *input,
const struct bcm5974_config *cfg,
const struct tp_finger *f, int raw_n)
{
int abs_p = 0, abs_w = 0;
if (raw_n) {
int p = raw2int(f->touch_major);
int w = raw2int(f->tool_major);
if (p > 0 && raw2int(f->origin)) {
abs_p = clamp_val(256 * p / cfg->p.max, 0, 255);
abs_w = clamp_val(16 * w / cfg->w.max, 0, 15);
}
}
input_report_abs(input, ABS_PRESSURE, abs_p);
input_report_abs(input, ABS_TOOL_WIDTH, abs_w);
}
/* report trackpad data as logical trackpad state */
static int report_tp_state(struct bcm5974 *dev, int size)
{
const struct bcm5974_config *c = &dev->cfg;
const struct tp_finger *f;
struct input_dev *input = dev->input;
int raw_n, i, n = 0;
if (size < c->tp_header || (size - c->tp_header) % c->tp_fsize != 0)
return -EIO;
raw_n = (size - c->tp_header) / c->tp_fsize;
for (i = 0; i < raw_n; i++) {
f = get_tp_finger(dev, i);
if (raw2int(f->touch_major) == 0)
continue;
dev->pos[n].x = raw2int(f->abs_x);
dev->pos[n].y = c->y.min + c->y.max - raw2int(f->abs_y);
dev->index[n++] = f;
}
input_mt_assign_slots(input, dev->slots, dev->pos, n, 0);
for (i = 0; i < n; i++)
report_finger_data(input, dev->slots[i],
&dev->pos[i], dev->index[i]);
input_mt_sync_frame(input);
report_synaptics_data(input, c, get_tp_finger(dev, 0), raw_n);
/* later types report button events via integrated button only */
if (c->caps & HAS_INTEGRATED_BUTTON) {
int ibt = raw2int(dev->tp_data[c->tp_button]);
input_report_key(input, BTN_LEFT, ibt);
}
input_sync(input);
return 0;
}
static int bcm5974_wellspring_mode(struct bcm5974 *dev, bool on)
{
const struct bcm5974_config *c = &dev->cfg;
int retval = 0, size;
char *data;
/* Type 3 does not require a mode switch */
if (c->tp_type == TYPE3)
return 0;
data = kmalloc(c->um_size, GFP_KERNEL);
if (!data) {
dev_err(&dev->intf->dev, "out of memory\n");
retval = -ENOMEM;
goto out;
}
/* read configuration */
size = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
BCM5974_WELLSPRING_MODE_READ_REQUEST_ID,
USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
c->um_req_val, c->um_req_idx, data, c->um_size, 5000);
if (size != c->um_size) {
dev_err(&dev->intf->dev, "could not read from device\n");
retval = -EIO;
goto out;
}
/* apply the mode switch */
data[c->um_switch_idx] = on ? c->um_switch_on : c->um_switch_off;
/* write configuration */
size = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID,
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
c->um_req_val, c->um_req_idx, data, c->um_size, 5000);
if (size != c->um_size) {
dev_err(&dev->intf->dev, "could not write to device\n");
retval = -EIO;
goto out;
}
dprintk(2, "bcm5974: switched to %s mode.\n",
on ? "wellspring" : "normal");
out:
kfree(data);
return retval;
}
static void bcm5974_irq_button(struct urb *urb)
{
struct bcm5974 *dev = urb->context;
struct usb_interface *intf = dev->intf;
int error;
switch (urb->status) {
case 0:
break;
case -EOVERFLOW:
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
dev_dbg(&intf->dev, "button urb shutting down: %d\n",
urb->status);
return;
default:
dev_dbg(&intf->dev, "button urb status: %d\n", urb->status);
goto exit;
}
if (report_bt_state(dev, dev->bt_urb->actual_length))
dprintk(1, "bcm5974: bad button package, length: %d\n",
dev->bt_urb->actual_length);
exit:
error = usb_submit_urb(dev->bt_urb, GFP_ATOMIC);
if (error)
dev_err(&intf->dev, "button urb failed: %d\n", error);
}
static void bcm5974_irq_trackpad(struct urb *urb)
{
struct bcm5974 *dev = urb->context;
struct usb_interface *intf = dev->intf;
int error;
switch (urb->status) {
case 0:
break;
case -EOVERFLOW:
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
dev_dbg(&intf->dev, "trackpad urb shutting down: %d\n",
urb->status);
return;
default:
dev_dbg(&intf->dev, "trackpad urb status: %d\n", urb->status);
goto exit;
}
/* control response ignored */
if (dev->tp_urb->actual_length == 2)
goto exit;
if (report_tp_state(dev, dev->tp_urb->actual_length))
dprintk(1, "bcm5974: bad trackpad package, length: %d\n",
dev->tp_urb->actual_length);
exit:
error = usb_submit_urb(dev->tp_urb, GFP_ATOMIC);
if (error)
dev_err(&intf->dev, "trackpad urb failed: %d\n", error);
}
/*
* The Wellspring trackpad, like many recent Apple trackpads, share
* the usb device with the keyboard. Since keyboards are usually
* handled by the HID system, the device ends up being handled by two
* modules. Setting up the device therefore becomes slightly
* complicated. To enable multitouch features, a mode switch is
* required, which is usually applied via the control interface of the
* device. It can be argued where this switch should take place. In
* some drivers, like appletouch, the switch is made during
* probe. However, the hid module may also alter the state of the
* device, resulting in trackpad malfunction under certain
* circumstances. To get around this problem, there is at least one
* example that utilizes the USB_QUIRK_RESET_RESUME quirk in order to
* receive a reset_resume request rather than the normal resume.
* Since the implementation of reset_resume is equal to mode switch
* plus start_traffic, it seems easier to always do the switch when
* starting traffic on the device.
*/
static int bcm5974_start_traffic(struct bcm5974 *dev)
{
int error;
error = bcm5974_wellspring_mode(dev, true);
if (error) {
dprintk(1, "bcm5974: mode switch failed\n");
goto err_out;
}
if (dev->bt_urb) {
error = usb_submit_urb(dev->bt_urb, GFP_KERNEL);
if (error)
goto err_reset_mode;
}
error = usb_submit_urb(dev->tp_urb, GFP_KERNEL);
if (error)
goto err_kill_bt;
return 0;
err_kill_bt:
usb_kill_urb(dev->bt_urb);
err_reset_mode:
bcm5974_wellspring_mode(dev, false);
err_out:
return error;
}
static void bcm5974_pause_traffic(struct bcm5974 *dev)
{
usb_kill_urb(dev->tp_urb);
usb_kill_urb(dev->bt_urb);
bcm5974_wellspring_mode(dev, false);
}
/*
* The code below implements open/close and manual suspend/resume.
* All functions may be called in random order.
*
* Opening a suspended device fails with EACCES - permission denied.
*
* Failing a resume leaves the device resumed but closed.
*/
static int bcm5974_open(struct input_dev *input)
{
struct bcm5974 *dev = input_get_drvdata(input);
int error;
error = usb_autopm_get_interface(dev->intf);
if (error)
return error;
mutex_lock(&dev->pm_mutex);
error = bcm5974_start_traffic(dev);
if (!error)
dev->opened = 1;
mutex_unlock(&dev->pm_mutex);
if (error)
usb_autopm_put_interface(dev->intf);
return error;
}
static void bcm5974_close(struct input_dev *input)
{
struct bcm5974 *dev = input_get_drvdata(input);
mutex_lock(&dev->pm_mutex);
bcm5974_pause_traffic(dev);
dev->opened = 0;
mutex_unlock(&dev->pm_mutex);
usb_autopm_put_interface(dev->intf);
}
static int bcm5974_suspend(struct usb_interface *iface, pm_message_t message)
{
struct bcm5974 *dev = usb_get_intfdata(iface);
mutex_lock(&dev->pm_mutex);
if (dev->opened)
bcm5974_pause_traffic(dev);
mutex_unlock(&dev->pm_mutex);
return 0;
}
static int bcm5974_resume(struct usb_interface *iface)
{
struct bcm5974 *dev = usb_get_intfdata(iface);
int error = 0;
mutex_lock(&dev->pm_mutex);
if (dev->opened)
error = bcm5974_start_traffic(dev);
mutex_unlock(&dev->pm_mutex);
return error;
}
static int bcm5974_probe(struct usb_interface *iface,
const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(iface);
const struct bcm5974_config *cfg;
struct bcm5974 *dev;
struct input_dev *input_dev;
int error = -ENOMEM;
/* find the product index */
cfg = bcm5974_get_config(udev);
/* allocate memory for our device state and initialize it */
dev = kzalloc(sizeof(struct bcm5974), GFP_KERNEL);
input_dev = input_allocate_device();
if (!dev || !input_dev) {
dev_err(&iface->dev, "out of memory\n");
goto err_free_devs;
}
dev->udev = udev;
dev->intf = iface;
dev->input = input_dev;
dev->cfg = *cfg;
mutex_init(&dev->pm_mutex);
/* setup urbs */
if (cfg->tp_type == TYPE1) {
dev->bt_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!dev->bt_urb)
goto err_free_devs;
}
dev->tp_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!dev->tp_urb)
goto err_free_bt_urb;
if (dev->bt_urb) {
dev->bt_data = usb_alloc_coherent(dev->udev,
dev->cfg.bt_datalen, GFP_KERNEL,
&dev->bt_urb->transfer_dma);
if (!dev->bt_data)
goto err_free_urb;
}
dev->tp_data = usb_alloc_coherent(dev->udev,
dev->cfg.tp_datalen, GFP_KERNEL,
&dev->tp_urb->transfer_dma);
if (!dev->tp_data)
goto err_free_bt_buffer;
if (dev->bt_urb) {
usb_fill_int_urb(dev->bt_urb, udev,
usb_rcvintpipe(udev, cfg->bt_ep),
dev->bt_data, dev->cfg.bt_datalen,
bcm5974_irq_button, dev, 1);
dev->bt_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
}
usb_fill_int_urb(dev->tp_urb, udev,
usb_rcvintpipe(udev, cfg->tp_ep),
dev->tp_data, dev->cfg.tp_datalen,
bcm5974_irq_trackpad, dev, 1);
dev->tp_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
/* create bcm5974 device */
usb_make_path(udev, dev->phys, sizeof(dev->phys));
strlcat(dev->phys, "/input0", sizeof(dev->phys));
input_dev->name = "bcm5974";
input_dev->phys = dev->phys;
usb_to_input_id(dev->udev, &input_dev->id);
/* report driver capabilities via the version field */
input_dev->id.version = cfg->caps;
input_dev->dev.parent = &iface->dev;
input_set_drvdata(input_dev, dev);
input_dev->open = bcm5974_open;
input_dev->close = bcm5974_close;
setup_events_to_report(input_dev, cfg);
error = input_register_device(dev->input);
if (error)
goto err_free_buffer;
/* save our data pointer in this interface device */
usb_set_intfdata(iface, dev);
return 0;
err_free_buffer:
usb_free_coherent(dev->udev, dev->cfg.tp_datalen,
dev->tp_data, dev->tp_urb->transfer_dma);
err_free_bt_buffer:
if (dev->bt_urb)
usb_free_coherent(dev->udev, dev->cfg.bt_datalen,
dev->bt_data, dev->bt_urb->transfer_dma);
err_free_urb:
usb_free_urb(dev->tp_urb);
err_free_bt_urb:
usb_free_urb(dev->bt_urb);
err_free_devs:
usb_set_intfdata(iface, NULL);
input_free_device(input_dev);
kfree(dev);
return error;
}
static void bcm5974_disconnect(struct usb_interface *iface)
{
struct bcm5974 *dev = usb_get_intfdata(iface);
usb_set_intfdata(iface, NULL);
input_unregister_device(dev->input);
usb_free_coherent(dev->udev, dev->cfg.tp_datalen,
dev->tp_data, dev->tp_urb->transfer_dma);
if (dev->bt_urb)
usb_free_coherent(dev->udev, dev->cfg.bt_datalen,
dev->bt_data, dev->bt_urb->transfer_dma);
usb_free_urb(dev->tp_urb);
usb_free_urb(dev->bt_urb);
kfree(dev);
}
static struct usb_driver bcm5974_driver = {
.name = "bcm5974",
.probe = bcm5974_probe,
.disconnect = bcm5974_disconnect,
.suspend = bcm5974_suspend,
.resume = bcm5974_resume,
.id_table = bcm5974_table,
.supports_autosuspend = 1,
};
module_usb_driver(bcm5974_driver);
|
linux-master
|
drivers/input/mouse/bcm5974.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 1999-2001 Vojtech Pavlik
*
* Based on the work of:
* James Banks Matthew Dillon
* David Giller Nathan Laredo
* Linus Torvalds Johan Myreen
* Cliff Matthews Philip Blundell
* Russell King
*/
/*
* Logitech Bus Mouse Driver for Linux
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <asm/io.h>
#include <asm/irq.h>
MODULE_AUTHOR("Vojtech Pavlik <[email protected]>");
MODULE_DESCRIPTION("Logitech busmouse driver");
MODULE_LICENSE("GPL");
#define LOGIBM_BASE 0x23c
#define LOGIBM_EXTENT 4
#define LOGIBM_DATA_PORT LOGIBM_BASE + 0
#define LOGIBM_SIGNATURE_PORT LOGIBM_BASE + 1
#define LOGIBM_CONTROL_PORT LOGIBM_BASE + 2
#define LOGIBM_CONFIG_PORT LOGIBM_BASE + 3
#define LOGIBM_ENABLE_IRQ 0x00
#define LOGIBM_DISABLE_IRQ 0x10
#define LOGIBM_READ_X_LOW 0x80
#define LOGIBM_READ_X_HIGH 0xa0
#define LOGIBM_READ_Y_LOW 0xc0
#define LOGIBM_READ_Y_HIGH 0xe0
#define LOGIBM_DEFAULT_MODE 0x90
#define LOGIBM_CONFIG_BYTE 0x91
#define LOGIBM_SIGNATURE_BYTE 0xa5
#define LOGIBM_IRQ 5
static int logibm_irq = LOGIBM_IRQ;
module_param_hw_named(irq, logibm_irq, uint, irq, 0);
MODULE_PARM_DESC(irq, "IRQ number (5=default)");
static struct input_dev *logibm_dev;
static irqreturn_t logibm_interrupt(int irq, void *dev_id)
{
char dx, dy;
unsigned char buttons;
outb(LOGIBM_READ_X_LOW, LOGIBM_CONTROL_PORT);
dx = (inb(LOGIBM_DATA_PORT) & 0xf);
outb(LOGIBM_READ_X_HIGH, LOGIBM_CONTROL_PORT);
dx |= (inb(LOGIBM_DATA_PORT) & 0xf) << 4;
outb(LOGIBM_READ_Y_LOW, LOGIBM_CONTROL_PORT);
dy = (inb(LOGIBM_DATA_PORT) & 0xf);
outb(LOGIBM_READ_Y_HIGH, LOGIBM_CONTROL_PORT);
buttons = inb(LOGIBM_DATA_PORT);
dy |= (buttons & 0xf) << 4;
buttons = ~buttons >> 5;
input_report_rel(logibm_dev, REL_X, dx);
input_report_rel(logibm_dev, REL_Y, dy);
input_report_key(logibm_dev, BTN_RIGHT, buttons & 1);
input_report_key(logibm_dev, BTN_MIDDLE, buttons & 2);
input_report_key(logibm_dev, BTN_LEFT, buttons & 4);
input_sync(logibm_dev);
outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT);
return IRQ_HANDLED;
}
static int logibm_open(struct input_dev *dev)
{
if (request_irq(logibm_irq, logibm_interrupt, 0, "logibm", NULL)) {
printk(KERN_ERR "logibm.c: Can't allocate irq %d\n", logibm_irq);
return -EBUSY;
}
outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT);
return 0;
}
static void logibm_close(struct input_dev *dev)
{
outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT);
free_irq(logibm_irq, NULL);
}
static int __init logibm_init(void)
{
int err;
if (!request_region(LOGIBM_BASE, LOGIBM_EXTENT, "logibm")) {
printk(KERN_ERR "logibm.c: Can't allocate ports at %#x\n", LOGIBM_BASE);
return -EBUSY;
}
outb(LOGIBM_CONFIG_BYTE, LOGIBM_CONFIG_PORT);
outb(LOGIBM_SIGNATURE_BYTE, LOGIBM_SIGNATURE_PORT);
udelay(100);
if (inb(LOGIBM_SIGNATURE_PORT) != LOGIBM_SIGNATURE_BYTE) {
printk(KERN_INFO "logibm.c: Didn't find Logitech busmouse at %#x\n", LOGIBM_BASE);
err = -ENODEV;
goto err_release_region;
}
outb(LOGIBM_DEFAULT_MODE, LOGIBM_CONFIG_PORT);
outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT);
logibm_dev = input_allocate_device();
if (!logibm_dev) {
printk(KERN_ERR "logibm.c: Not enough memory for input device\n");
err = -ENOMEM;
goto err_release_region;
}
logibm_dev->name = "Logitech bus mouse";
logibm_dev->phys = "isa023c/input0";
logibm_dev->id.bustype = BUS_ISA;
logibm_dev->id.vendor = 0x0003;
logibm_dev->id.product = 0x0001;
logibm_dev->id.version = 0x0100;
logibm_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
logibm_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
logibm_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
logibm_dev->open = logibm_open;
logibm_dev->close = logibm_close;
err = input_register_device(logibm_dev);
if (err)
goto err_free_dev;
return 0;
err_free_dev:
input_free_device(logibm_dev);
err_release_region:
release_region(LOGIBM_BASE, LOGIBM_EXTENT);
return err;
}
static void __exit logibm_exit(void)
{
input_unregister_device(logibm_dev);
release_region(LOGIBM_BASE, LOGIBM_EXTENT);
}
module_init(logibm_init);
module_exit(logibm_exit);
|
linux-master
|
drivers/input/mouse/logibm.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Elan I2C/SMBus Touchpad driver - I2C interface
*
* Copyright (c) 2013 ELAN Microelectronics Corp.
*
* Author: 林政維 (Duson Lin) <[email protected]>
*
* Based on cyapa driver:
* copyright (c) 2011-2012 Cypress Semiconductor, Inc.
* copyright (c) 2011-2012 Google, Inc.
*
* Trademarks are the property of their respective owners.
*/
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <asm/unaligned.h>
#include "elan_i2c.h"
/* Elan i2c commands */
#define ETP_I2C_RESET 0x0100
#define ETP_I2C_WAKE_UP 0x0800
#define ETP_I2C_SLEEP 0x0801
#define ETP_I2C_DESC_CMD 0x0001
#define ETP_I2C_REPORT_DESC_CMD 0x0002
#define ETP_I2C_STAND_CMD 0x0005
#define ETP_I2C_PATTERN_CMD 0x0100
#define ETP_I2C_UNIQUEID_CMD 0x0101
#define ETP_I2C_FW_VERSION_CMD 0x0102
#define ETP_I2C_IC_TYPE_CMD 0x0103
#define ETP_I2C_OSM_VERSION_CMD 0x0103
#define ETP_I2C_NSM_VERSION_CMD 0x0104
#define ETP_I2C_XY_TRACENUM_CMD 0x0105
#define ETP_I2C_MAX_X_AXIS_CMD 0x0106
#define ETP_I2C_MAX_Y_AXIS_CMD 0x0107
#define ETP_I2C_RESOLUTION_CMD 0x0108
#define ETP_I2C_PRESSURE_CMD 0x010A
#define ETP_I2C_IAP_VERSION_CMD 0x0110
#define ETP_I2C_IC_TYPE_P0_CMD 0x0110
#define ETP_I2C_IAP_VERSION_P0_CMD 0x0111
#define ETP_I2C_SET_CMD 0x0300
#define ETP_I2C_POWER_CMD 0x0307
#define ETP_I2C_FW_CHECKSUM_CMD 0x030F
#define ETP_I2C_IAP_CTRL_CMD 0x0310
#define ETP_I2C_IAP_CMD 0x0311
#define ETP_I2C_IAP_RESET_CMD 0x0314
#define ETP_I2C_IAP_CHECKSUM_CMD 0x0315
#define ETP_I2C_CALIBRATE_CMD 0x0316
#define ETP_I2C_MAX_BASELINE_CMD 0x0317
#define ETP_I2C_MIN_BASELINE_CMD 0x0318
#define ETP_I2C_IAP_TYPE_REG 0x0040
#define ETP_I2C_IAP_TYPE_CMD 0x0304
#define ETP_I2C_REPORT_LEN 34
#define ETP_I2C_REPORT_LEN_ID2 39
#define ETP_I2C_REPORT_MAX_LEN 39
#define ETP_I2C_DESC_LENGTH 30
#define ETP_I2C_REPORT_DESC_LENGTH 158
#define ETP_I2C_INF_LENGTH 2
#define ETP_I2C_IAP_PASSWORD 0x1EA5
#define ETP_I2C_IAP_RESET 0xF0F0
#define ETP_I2C_MAIN_MODE_ON (1 << 9)
#define ETP_I2C_IAP_REG_L 0x01
#define ETP_I2C_IAP_REG_H 0x06
static int elan_i2c_read_block(struct i2c_client *client,
u16 reg, u8 *val, u16 len)
{
__le16 buf[] = {
cpu_to_le16(reg),
};
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = client->flags & I2C_M_TEN,
.len = sizeof(buf),
.buf = (u8 *)buf,
},
{
.addr = client->addr,
.flags = (client->flags & I2C_M_TEN) | I2C_M_RD,
.len = len,
.buf = val,
}
};
int ret;
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
return ret == ARRAY_SIZE(msgs) ? 0 : (ret < 0 ? ret : -EIO);
}
static int elan_i2c_read_cmd(struct i2c_client *client, u16 reg, u8 *val)
{
int retval;
retval = elan_i2c_read_block(client, reg, val, ETP_I2C_INF_LENGTH);
if (retval < 0) {
dev_err(&client->dev, "reading cmd (0x%04x) fail.\n", reg);
return retval;
}
return 0;
}
static int elan_i2c_write_cmd(struct i2c_client *client, u16 reg, u16 cmd)
{
__le16 buf[] = {
cpu_to_le16(reg),
cpu_to_le16(cmd),
};
struct i2c_msg msg = {
.addr = client->addr,
.flags = client->flags & I2C_M_TEN,
.len = sizeof(buf),
.buf = (u8 *)buf,
};
int ret;
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret != 1) {
if (ret >= 0)
ret = -EIO;
dev_err(&client->dev, "writing cmd (0x%04x) failed: %d\n",
reg, ret);
return ret;
}
return 0;
}
static int elan_i2c_initialize(struct i2c_client *client)
{
struct device *dev = &client->dev;
int error;
u8 val[256];
error = elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD, ETP_I2C_RESET);
if (error) {
dev_err(dev, "device reset failed: %d\n", error);
return error;
}
/* Wait for the device to reset */
msleep(100);
/* get reset acknowledgement 0000 */
error = i2c_master_recv(client, val, ETP_I2C_INF_LENGTH);
if (error < 0) {
dev_err(dev, "failed to read reset response: %d\n", error);
return error;
}
error = elan_i2c_read_block(client, ETP_I2C_DESC_CMD,
val, ETP_I2C_DESC_LENGTH);
if (error) {
dev_err(dev, "cannot get device descriptor: %d\n", error);
return error;
}
error = elan_i2c_read_block(client, ETP_I2C_REPORT_DESC_CMD,
val, ETP_I2C_REPORT_DESC_LENGTH);
if (error) {
dev_err(dev, "fetching report descriptor failed.: %d\n", error);
return error;
}
return 0;
}
static int elan_i2c_sleep_control(struct i2c_client *client, bool sleep)
{
return elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD,
sleep ? ETP_I2C_SLEEP : ETP_I2C_WAKE_UP);
}
static int elan_i2c_power_control(struct i2c_client *client, bool enable)
{
u8 val[2];
u16 reg;
int error;
error = elan_i2c_read_cmd(client, ETP_I2C_POWER_CMD, val);
if (error) {
dev_err(&client->dev,
"failed to read current power state: %d\n",
error);
return error;
}
reg = le16_to_cpup((__le16 *)val);
if (enable)
reg &= ~ETP_DISABLE_POWER;
else
reg |= ETP_DISABLE_POWER;
error = elan_i2c_write_cmd(client, ETP_I2C_POWER_CMD, reg);
if (error) {
dev_err(&client->dev,
"failed to write current power state: %d\n",
error);
return error;
}
return 0;
}
static int elan_i2c_set_mode(struct i2c_client *client, u8 mode)
{
return elan_i2c_write_cmd(client, ETP_I2C_SET_CMD, mode);
}
static int elan_i2c_calibrate(struct i2c_client *client)
{
return elan_i2c_write_cmd(client, ETP_I2C_CALIBRATE_CMD, 1);
}
static int elan_i2c_calibrate_result(struct i2c_client *client, u8 *val)
{
return elan_i2c_read_block(client, ETP_I2C_CALIBRATE_CMD, val, 1);
}
static int elan_i2c_get_baseline_data(struct i2c_client *client,
bool max_baseline, u8 *value)
{
int error;
u8 val[3];
error = elan_i2c_read_cmd(client,
max_baseline ? ETP_I2C_MAX_BASELINE_CMD :
ETP_I2C_MIN_BASELINE_CMD,
val);
if (error)
return error;
*value = le16_to_cpup((__le16 *)val);
return 0;
}
static int elan_i2c_get_pattern(struct i2c_client *client, u8 *pattern)
{
int error;
u8 val[3];
error = elan_i2c_read_cmd(client, ETP_I2C_PATTERN_CMD, val);
if (error) {
dev_err(&client->dev, "failed to get pattern: %d\n", error);
return error;
}
/*
* Not all versions of firmware implement "get pattern" command.
* When this command is not implemented the device will respond
* with 0xFF 0xFF, which we will treat as "old" pattern 0.
*/
*pattern = val[0] == 0xFF && val[1] == 0xFF ? 0 : val[1];
return 0;
}
static int elan_i2c_get_version(struct i2c_client *client,
u8 pattern, bool iap, u8 *version)
{
int error;
u16 cmd;
u8 val[3];
if (!iap)
cmd = ETP_I2C_FW_VERSION_CMD;
else if (pattern == 0)
cmd = ETP_I2C_IAP_VERSION_P0_CMD;
else
cmd = ETP_I2C_IAP_VERSION_CMD;
error = elan_i2c_read_cmd(client, cmd, val);
if (error) {
dev_err(&client->dev, "failed to get %s version: %d\n",
iap ? "IAP" : "FW", error);
return error;
}
if (pattern >= 0x01)
*version = iap ? val[1] : val[0];
else
*version = val[0];
return 0;
}
static int elan_i2c_get_sm_version(struct i2c_client *client, u8 pattern,
u16 *ic_type, u8 *version, u8 *clickpad)
{
int error;
u8 val[3];
if (pattern >= 0x01) {
error = elan_i2c_read_cmd(client, ETP_I2C_IC_TYPE_CMD, val);
if (error) {
dev_err(&client->dev, "failed to get ic type: %d\n",
error);
return error;
}
*ic_type = be16_to_cpup((__be16 *)val);
error = elan_i2c_read_cmd(client, ETP_I2C_NSM_VERSION_CMD,
val);
if (error) {
dev_err(&client->dev, "failed to get SM version: %d\n",
error);
return error;
}
*version = val[1];
*clickpad = val[0] & 0x10;
} else {
error = elan_i2c_read_cmd(client, ETP_I2C_OSM_VERSION_CMD, val);
if (error) {
dev_err(&client->dev, "failed to get SM version: %d\n",
error);
return error;
}
*version = val[0];
error = elan_i2c_read_cmd(client, ETP_I2C_IC_TYPE_P0_CMD, val);
if (error) {
dev_err(&client->dev, "failed to get ic type: %d\n",
error);
return error;
}
*ic_type = val[0];
error = elan_i2c_read_cmd(client, ETP_I2C_NSM_VERSION_CMD,
val);
if (error) {
dev_err(&client->dev, "failed to get SM version: %d\n",
error);
return error;
}
*clickpad = val[0] & 0x10;
}
return 0;
}
static int elan_i2c_get_product_id(struct i2c_client *client, u16 *id)
{
int error;
u8 val[3];
error = elan_i2c_read_cmd(client, ETP_I2C_UNIQUEID_CMD, val);
if (error) {
dev_err(&client->dev, "failed to get product ID: %d\n", error);
return error;
}
*id = le16_to_cpup((__le16 *)val);
return 0;
}
static int elan_i2c_get_checksum(struct i2c_client *client,
bool iap, u16 *csum)
{
int error;
u8 val[3];
error = elan_i2c_read_cmd(client,
iap ? ETP_I2C_IAP_CHECKSUM_CMD :
ETP_I2C_FW_CHECKSUM_CMD,
val);
if (error) {
dev_err(&client->dev, "failed to get %s checksum: %d\n",
iap ? "IAP" : "FW", error);
return error;
}
*csum = le16_to_cpup((__le16 *)val);
return 0;
}
static int elan_i2c_get_max(struct i2c_client *client,
unsigned int *max_x, unsigned int *max_y)
{
int error;
u8 val[3];
error = elan_i2c_read_cmd(client, ETP_I2C_MAX_X_AXIS_CMD, val);
if (error) {
dev_err(&client->dev, "failed to get X dimension: %d\n", error);
return error;
}
*max_x = le16_to_cpup((__le16 *)val);
error = elan_i2c_read_cmd(client, ETP_I2C_MAX_Y_AXIS_CMD, val);
if (error) {
dev_err(&client->dev, "failed to get Y dimension: %d\n", error);
return error;
}
*max_y = le16_to_cpup((__le16 *)val);
return 0;
}
static int elan_i2c_get_resolution(struct i2c_client *client,
u8 *hw_res_x, u8 *hw_res_y)
{
int error;
u8 val[3];
error = elan_i2c_read_cmd(client, ETP_I2C_RESOLUTION_CMD, val);
if (error) {
dev_err(&client->dev, "failed to get resolution: %d\n", error);
return error;
}
*hw_res_x = val[0];
*hw_res_y = val[1];
return 0;
}
static int elan_i2c_get_num_traces(struct i2c_client *client,
unsigned int *x_traces,
unsigned int *y_traces)
{
int error;
u8 val[3];
error = elan_i2c_read_cmd(client, ETP_I2C_XY_TRACENUM_CMD, val);
if (error) {
dev_err(&client->dev, "failed to get trace info: %d\n", error);
return error;
}
*x_traces = val[0];
*y_traces = val[1];
return 0;
}
static int elan_i2c_get_pressure_adjustment(struct i2c_client *client,
int *adjustment)
{
int error;
u8 val[3];
error = elan_i2c_read_cmd(client, ETP_I2C_PRESSURE_CMD, val);
if (error) {
dev_err(&client->dev, "failed to get pressure format: %d\n",
error);
return error;
}
if ((val[0] >> 4) & 0x1)
*adjustment = 0;
else
*adjustment = ETP_PRESSURE_OFFSET;
return 0;
}
static int elan_i2c_iap_get_mode(struct i2c_client *client, enum tp_mode *mode)
{
int error;
u16 constant;
u8 val[3];
error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CTRL_CMD, val);
if (error) {
dev_err(&client->dev,
"failed to read iap control register: %d\n",
error);
return error;
}
constant = le16_to_cpup((__le16 *)val);
dev_dbg(&client->dev, "iap control reg: 0x%04x.\n", constant);
*mode = (constant & ETP_I2C_MAIN_MODE_ON) ? MAIN_MODE : IAP_MODE;
return 0;
}
static int elan_i2c_iap_reset(struct i2c_client *client)
{
int error;
error = elan_i2c_write_cmd(client, ETP_I2C_IAP_RESET_CMD,
ETP_I2C_IAP_RESET);
if (error) {
dev_err(&client->dev, "cannot reset IC: %d\n", error);
return error;
}
return 0;
}
static int elan_i2c_set_flash_key(struct i2c_client *client)
{
int error;
error = elan_i2c_write_cmd(client, ETP_I2C_IAP_CMD,
ETP_I2C_IAP_PASSWORD);
if (error) {
dev_err(&client->dev, "cannot set flash key: %d\n", error);
return error;
}
return 0;
}
static int elan_read_write_iap_type(struct i2c_client *client, u16 fw_page_size)
{
int error;
u16 constant;
u8 val[3];
int retry = 3;
do {
error = elan_i2c_write_cmd(client, ETP_I2C_IAP_TYPE_CMD,
fw_page_size / 2);
if (error) {
dev_err(&client->dev,
"cannot write iap type: %d\n", error);
return error;
}
error = elan_i2c_read_cmd(client, ETP_I2C_IAP_TYPE_CMD, val);
if (error) {
dev_err(&client->dev,
"failed to read iap type register: %d\n",
error);
return error;
}
constant = le16_to_cpup((__le16 *)val);
dev_dbg(&client->dev, "iap type reg: 0x%04x\n", constant);
if (constant == fw_page_size / 2)
return 0;
} while (--retry > 0);
dev_err(&client->dev, "cannot set iap type\n");
return -EIO;
}
static int elan_i2c_prepare_fw_update(struct i2c_client *client, u16 ic_type,
u8 iap_version, u16 fw_page_size)
{
struct device *dev = &client->dev;
int error;
enum tp_mode mode;
u8 val[3];
u16 password;
/* Get FW in which mode (IAP_MODE/MAIN_MODE) */
error = elan_i2c_iap_get_mode(client, &mode);
if (error)
return error;
if (mode == IAP_MODE) {
/* Reset IC */
error = elan_i2c_iap_reset(client);
if (error)
return error;
msleep(30);
}
/* Set flash key*/
error = elan_i2c_set_flash_key(client);
if (error)
return error;
/* Wait for F/W IAP initialization */
msleep(mode == MAIN_MODE ? 100 : 30);
/* Check if we are in IAP mode or not */
error = elan_i2c_iap_get_mode(client, &mode);
if (error)
return error;
if (mode == MAIN_MODE) {
dev_err(dev, "wrong mode: %d\n", mode);
return -EIO;
}
if (ic_type >= 0x0D && iap_version >= 1) {
error = elan_read_write_iap_type(client, fw_page_size);
if (error)
return error;
}
/* Set flash key again */
error = elan_i2c_set_flash_key(client);
if (error)
return error;
/* Wait for F/W IAP initialization */
msleep(30);
/* read back to check we actually enabled successfully. */
error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CMD, val);
if (error) {
dev_err(dev, "cannot read iap password: %d\n",
error);
return error;
}
password = le16_to_cpup((__le16 *)val);
if (password != ETP_I2C_IAP_PASSWORD) {
dev_err(dev, "wrong iap password: 0x%X\n", password);
return -EIO;
}
return 0;
}
static int elan_i2c_write_fw_block(struct i2c_client *client, u16 fw_page_size,
const u8 *page, u16 checksum, int idx)
{
struct device *dev = &client->dev;
u8 *page_store;
u8 val[3];
u16 result;
int ret, error;
page_store = kmalloc(fw_page_size + 4, GFP_KERNEL);
if (!page_store)
return -ENOMEM;
page_store[0] = ETP_I2C_IAP_REG_L;
page_store[1] = ETP_I2C_IAP_REG_H;
memcpy(&page_store[2], page, fw_page_size);
/* recode checksum at last two bytes */
put_unaligned_le16(checksum, &page_store[fw_page_size + 2]);
ret = i2c_master_send(client, page_store, fw_page_size + 4);
if (ret != fw_page_size + 4) {
error = ret < 0 ? ret : -EIO;
dev_err(dev, "Failed to write page %d: %d\n", idx, error);
goto exit;
}
/* Wait for F/W to update one page ROM data. */
msleep(fw_page_size == ETP_FW_PAGE_SIZE_512 ? 50 : 35);
error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CTRL_CMD, val);
if (error) {
dev_err(dev, "Failed to read IAP write result: %d\n", error);
goto exit;
}
result = le16_to_cpup((__le16 *)val);
if (result & (ETP_FW_IAP_PAGE_ERR | ETP_FW_IAP_INTF_ERR)) {
dev_err(dev, "IAP reports failed write: %04hx\n",
result);
error = -EIO;
goto exit;
}
exit:
kfree(page_store);
return error;
}
static int elan_i2c_finish_fw_update(struct i2c_client *client,
struct completion *completion)
{
struct device *dev = &client->dev;
int error = 0;
int len;
u8 buffer[ETP_I2C_REPORT_MAX_LEN];
len = i2c_master_recv(client, buffer, ETP_I2C_REPORT_MAX_LEN);
if (len <= 0) {
error = len < 0 ? len : -EIO;
dev_warn(dev, "failed to read I2C data after FW WDT reset: %d (%d)\n",
error, len);
}
reinit_completion(completion);
enable_irq(client->irq);
error = elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD, ETP_I2C_RESET);
if (error) {
dev_err(dev, "device reset failed: %d\n", error);
} else if (!wait_for_completion_timeout(completion,
msecs_to_jiffies(300))) {
dev_err(dev, "timeout waiting for device reset\n");
error = -ETIMEDOUT;
}
disable_irq(client->irq);
if (error)
return error;
len = i2c_master_recv(client, buffer, ETP_I2C_INF_LENGTH);
if (len != ETP_I2C_INF_LENGTH) {
error = len < 0 ? len : -EIO;
dev_err(dev, "failed to read INT signal: %d (%d)\n",
error, len);
return error;
}
return 0;
}
static int elan_i2c_get_report_features(struct i2c_client *client, u8 pattern,
unsigned int *features,
unsigned int *report_len)
{
*features = ETP_FEATURE_REPORT_MK;
*report_len = pattern <= 0x01 ?
ETP_I2C_REPORT_LEN : ETP_I2C_REPORT_LEN_ID2;
return 0;
}
static int elan_i2c_get_report(struct i2c_client *client,
u8 *report, unsigned int report_len)
{
int len;
len = i2c_master_recv(client, report, report_len);
if (len < 0) {
dev_err(&client->dev, "failed to read report data: %d\n", len);
return len;
}
if (len != report_len) {
dev_err(&client->dev,
"wrong report length (%d vs %d expected)\n",
len, report_len);
return -EIO;
}
return 0;
}
const struct elan_transport_ops elan_i2c_ops = {
.initialize = elan_i2c_initialize,
.sleep_control = elan_i2c_sleep_control,
.power_control = elan_i2c_power_control,
.set_mode = elan_i2c_set_mode,
.calibrate = elan_i2c_calibrate,
.calibrate_result = elan_i2c_calibrate_result,
.get_baseline_data = elan_i2c_get_baseline_data,
.get_version = elan_i2c_get_version,
.get_sm_version = elan_i2c_get_sm_version,
.get_product_id = elan_i2c_get_product_id,
.get_checksum = elan_i2c_get_checksum,
.get_pressure_adjustment = elan_i2c_get_pressure_adjustment,
.get_max = elan_i2c_get_max,
.get_resolution = elan_i2c_get_resolution,
.get_num_traces = elan_i2c_get_num_traces,
.iap_get_mode = elan_i2c_iap_get_mode,
.iap_reset = elan_i2c_iap_reset,
.prepare_fw_update = elan_i2c_prepare_fw_update,
.write_fw_block = elan_i2c_write_fw_block,
.finish_fw_update = elan_i2c_finish_fw_update,
.get_pattern = elan_i2c_get_pattern,
.get_report_features = elan_i2c_get_report_features,
.get_report = elan_i2c_get_report,
};
|
linux-master
|
drivers/input/mouse/elan_i2c_i2c.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Fujitsu B-series Lifebook PS/2 TouchScreen driver
*
* Copyright (c) 2005 Vojtech Pavlik <[email protected]>
* Copyright (c) 2005 Kenan Esau <[email protected]>
*
* TouchScreen detection, absolute mode setting and packet layout is taken from
* Harald Hoyer's description of the device.
*/
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/libps2.h>
#include <linux/dmi.h>
#include <linux/slab.h>
#include <linux/types.h>
#include "psmouse.h"
#include "lifebook.h"
struct lifebook_data {
struct input_dev *dev2; /* Relative device */
char phys[32];
};
static bool lifebook_present;
static const char *desired_serio_phys;
static int lifebook_limit_serio3(const struct dmi_system_id *d)
{
desired_serio_phys = "isa0060/serio3";
return 1;
}
static bool lifebook_use_6byte_proto;
static int lifebook_set_6byte_proto(const struct dmi_system_id *d)
{
lifebook_use_6byte_proto = true;
return 1;
}
static const struct dmi_system_id lifebook_dmi_table[] __initconst = {
{
/* FLORA-ie 55mi */
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "FLORA-ie 55mi"),
},
},
{
/* LifeBook B */
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "Lifebook B Series"),
},
},
{
/* LifeBook B */
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B Series"),
},
},
{
/* Lifebook B */
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK B Series"),
},
},
{
/* Lifebook B-2130 */
.matches = {
DMI_MATCH(DMI_BOARD_NAME, "ZEPHYR"),
},
},
{
/* Lifebook B213x/B2150 */
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B2131/B2133/B2150"),
},
},
{
/* Zephyr */
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "ZEPHYR"),
},
},
{
/* Panasonic CF-18 */
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "CF-18"),
},
.callback = lifebook_limit_serio3,
},
{
/* Panasonic CF-28 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Matsushita"),
DMI_MATCH(DMI_PRODUCT_NAME, "CF-28"),
},
.callback = lifebook_set_6byte_proto,
},
{
/* Panasonic CF-29 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Matsushita"),
DMI_MATCH(DMI_PRODUCT_NAME, "CF-29"),
},
.callback = lifebook_set_6byte_proto,
},
{
/* Panasonic CF-72 */
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "CF-72"),
},
.callback = lifebook_set_6byte_proto,
},
{
/* Lifebook B142 */
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B142"),
},
},
{ }
};
void __init lifebook_module_init(void)
{
lifebook_present = dmi_check_system(lifebook_dmi_table);
}
static psmouse_ret_t lifebook_process_byte(struct psmouse *psmouse)
{
struct lifebook_data *priv = psmouse->private;
struct input_dev *dev1 = psmouse->dev;
struct input_dev *dev2 = priv ? priv->dev2 : NULL;
u8 *packet = psmouse->packet;
bool relative_packet = packet[0] & 0x08;
if (relative_packet || !lifebook_use_6byte_proto) {
if (psmouse->pktcnt != 3)
return PSMOUSE_GOOD_DATA;
} else {
switch (psmouse->pktcnt) {
case 1:
return (packet[0] & 0xf8) == 0x00 ?
PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
case 2:
return PSMOUSE_GOOD_DATA;
case 3:
return ((packet[2] & 0x30) << 2) == (packet[2] & 0xc0) ?
PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
case 4:
return (packet[3] & 0xf8) == 0xc0 ?
PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
case 5:
return (packet[4] & 0xc0) == (packet[2] & 0xc0) ?
PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
case 6:
if (((packet[5] & 0x30) << 2) != (packet[5] & 0xc0))
return PSMOUSE_BAD_DATA;
if ((packet[5] & 0xc0) != (packet[1] & 0xc0))
return PSMOUSE_BAD_DATA;
break; /* report data */
}
}
if (relative_packet) {
if (!dev2)
psmouse_warn(psmouse,
"got relative packet but no relative device set up\n");
} else {
if (lifebook_use_6byte_proto) {
input_report_abs(dev1, ABS_X,
((packet[1] & 0x3f) << 6) | (packet[2] & 0x3f));
input_report_abs(dev1, ABS_Y,
4096 - (((packet[4] & 0x3f) << 6) | (packet[5] & 0x3f)));
} else {
input_report_abs(dev1, ABS_X,
(packet[1] | ((packet[0] & 0x30) << 4)));
input_report_abs(dev1, ABS_Y,
1024 - (packet[2] | ((packet[0] & 0xC0) << 2)));
}
input_report_key(dev1, BTN_TOUCH, packet[0] & 0x04);
input_sync(dev1);
}
if (dev2) {
if (relative_packet)
psmouse_report_standard_motion(dev2, packet);
psmouse_report_standard_buttons(dev2, packet[0]);
input_sync(dev2);
}
return PSMOUSE_FULL_PACKET;
}
static int lifebook_absolute_mode(struct psmouse *psmouse)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param;
int error;
error = psmouse_reset(psmouse);
if (error)
return error;
/*
* Enable absolute output -- ps2_command fails always but if
* you leave this call out the touchscreen will never send
* absolute coordinates
*/
param = lifebook_use_6byte_proto ? 0x08 : 0x07;
ps2_command(ps2dev, ¶m, PSMOUSE_CMD_SETRES);
return 0;
}
static void lifebook_relative_mode(struct psmouse *psmouse)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param = 0x06;
ps2_command(ps2dev, ¶m, PSMOUSE_CMD_SETRES);
}
static void lifebook_set_resolution(struct psmouse *psmouse, unsigned int resolution)
{
static const u8 params[] = { 0, 1, 2, 2, 3 };
u8 p;
if (resolution == 0 || resolution > 400)
resolution = 400;
p = params[resolution / 100];
ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
psmouse->resolution = 50 << p;
}
static void lifebook_disconnect(struct psmouse *psmouse)
{
struct lifebook_data *priv = psmouse->private;
psmouse_reset(psmouse);
if (priv) {
input_unregister_device(priv->dev2);
kfree(priv);
}
psmouse->private = NULL;
}
int lifebook_detect(struct psmouse *psmouse, bool set_properties)
{
if (!lifebook_present)
return -ENXIO;
if (desired_serio_phys &&
strcmp(psmouse->ps2dev.serio->phys, desired_serio_phys))
return -ENXIO;
if (set_properties) {
psmouse->vendor = "Fujitsu";
psmouse->name = "Lifebook TouchScreen";
}
return 0;
}
static int lifebook_create_relative_device(struct psmouse *psmouse)
{
struct input_dev *dev2;
struct lifebook_data *priv;
int error = -ENOMEM;
priv = kzalloc(sizeof(struct lifebook_data), GFP_KERNEL);
dev2 = input_allocate_device();
if (!priv || !dev2)
goto err_out;
priv->dev2 = dev2;
snprintf(priv->phys, sizeof(priv->phys),
"%s/input1", psmouse->ps2dev.serio->phys);
dev2->phys = priv->phys;
dev2->name = "LBPS/2 Fujitsu Lifebook Touchpad";
dev2->id.bustype = BUS_I8042;
dev2->id.vendor = 0x0002;
dev2->id.product = PSMOUSE_LIFEBOOK;
dev2->id.version = 0x0000;
dev2->dev.parent = &psmouse->ps2dev.serio->dev;
input_set_capability(dev2, EV_REL, REL_X);
input_set_capability(dev2, EV_REL, REL_Y);
input_set_capability(dev2, EV_KEY, BTN_LEFT);
input_set_capability(dev2, EV_KEY, BTN_RIGHT);
error = input_register_device(priv->dev2);
if (error)
goto err_out;
psmouse->private = priv;
return 0;
err_out:
input_free_device(dev2);
kfree(priv);
return error;
}
int lifebook_init(struct psmouse *psmouse)
{
struct input_dev *dev1 = psmouse->dev;
int max_coord = lifebook_use_6byte_proto ? 4096 : 1024;
int error;
error = lifebook_absolute_mode(psmouse);
if (error)
return error;
/* Clear default capabilities */
bitmap_zero(dev1->evbit, EV_CNT);
bitmap_zero(dev1->relbit, REL_CNT);
bitmap_zero(dev1->keybit, KEY_CNT);
input_set_capability(dev1, EV_KEY, BTN_TOUCH);
input_set_abs_params(dev1, ABS_X, 0, max_coord, 0, 0);
input_set_abs_params(dev1, ABS_Y, 0, max_coord, 0, 0);
if (!desired_serio_phys) {
error = lifebook_create_relative_device(psmouse);
if (error) {
lifebook_relative_mode(psmouse);
return error;
}
}
psmouse->protocol_handler = lifebook_process_byte;
psmouse->set_resolution = lifebook_set_resolution;
psmouse->disconnect = lifebook_disconnect;
psmouse->reconnect = lifebook_absolute_mode;
psmouse->model = lifebook_use_6byte_proto ? 6 : 3;
/*
* Use packet size = 3 even when using 6-byte protocol because
* that's what POLL will return on Lifebooks (according to spec).
*/
psmouse->pktsize = 3;
return 0;
}
|
linux-master
|
drivers/input/mouse/lifebook.c
|
/*
* Synaptics touchpad with I2C interface
*
* Copyright (C) 2009 Compulab, Ltd.
* Mike Rapoport <[email protected]>
* Igor Grinberg <[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.
*/
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/slab.h>
#include <linux/pm.h>
#define DRIVER_NAME "synaptics_i2c"
/* maximum product id is 15 characters */
#define PRODUCT_ID_LENGTH 15
#define REGISTER_LENGTH 8
/*
* after soft reset, we should wait for 1 ms
* before the device becomes operational
*/
#define SOFT_RESET_DELAY_US 3000
/* and after hard reset, we should wait for max 500ms */
#define HARD_RESET_DELAY_MS 500
/* Registers by SMBus address */
#define PAGE_SEL_REG 0xff
#define DEVICE_STATUS_REG 0x09
/* Registers by RMI address */
#define DEV_CONTROL_REG 0x0000
#define INTERRUPT_EN_REG 0x0001
#define ERR_STAT_REG 0x0002
#define INT_REQ_STAT_REG 0x0003
#define DEV_COMMAND_REG 0x0004
#define RMI_PROT_VER_REG 0x0200
#define MANUFACT_ID_REG 0x0201
#define PHYS_INT_VER_REG 0x0202
#define PROD_PROPERTY_REG 0x0203
#define INFO_QUERY_REG0 0x0204
#define INFO_QUERY_REG1 (INFO_QUERY_REG0 + 1)
#define INFO_QUERY_REG2 (INFO_QUERY_REG0 + 2)
#define INFO_QUERY_REG3 (INFO_QUERY_REG0 + 3)
#define PRODUCT_ID_REG0 0x0210
#define PRODUCT_ID_REG1 (PRODUCT_ID_REG0 + 1)
#define PRODUCT_ID_REG2 (PRODUCT_ID_REG0 + 2)
#define PRODUCT_ID_REG3 (PRODUCT_ID_REG0 + 3)
#define PRODUCT_ID_REG4 (PRODUCT_ID_REG0 + 4)
#define PRODUCT_ID_REG5 (PRODUCT_ID_REG0 + 5)
#define PRODUCT_ID_REG6 (PRODUCT_ID_REG0 + 6)
#define PRODUCT_ID_REG7 (PRODUCT_ID_REG0 + 7)
#define PRODUCT_ID_REG8 (PRODUCT_ID_REG0 + 8)
#define PRODUCT_ID_REG9 (PRODUCT_ID_REG0 + 9)
#define PRODUCT_ID_REG10 (PRODUCT_ID_REG0 + 10)
#define PRODUCT_ID_REG11 (PRODUCT_ID_REG0 + 11)
#define PRODUCT_ID_REG12 (PRODUCT_ID_REG0 + 12)
#define PRODUCT_ID_REG13 (PRODUCT_ID_REG0 + 13)
#define PRODUCT_ID_REG14 (PRODUCT_ID_REG0 + 14)
#define PRODUCT_ID_REG15 (PRODUCT_ID_REG0 + 15)
#define DATA_REG0 0x0400
#define ABS_PRESSURE_REG 0x0401
#define ABS_MSB_X_REG 0x0402
#define ABS_LSB_X_REG (ABS_MSB_X_REG + 1)
#define ABS_MSB_Y_REG 0x0404
#define ABS_LSB_Y_REG (ABS_MSB_Y_REG + 1)
#define REL_X_REG 0x0406
#define REL_Y_REG 0x0407
#define DEV_QUERY_REG0 0x1000
#define DEV_QUERY_REG1 (DEV_QUERY_REG0 + 1)
#define DEV_QUERY_REG2 (DEV_QUERY_REG0 + 2)
#define DEV_QUERY_REG3 (DEV_QUERY_REG0 + 3)
#define DEV_QUERY_REG4 (DEV_QUERY_REG0 + 4)
#define DEV_QUERY_REG5 (DEV_QUERY_REG0 + 5)
#define DEV_QUERY_REG6 (DEV_QUERY_REG0 + 6)
#define DEV_QUERY_REG7 (DEV_QUERY_REG0 + 7)
#define DEV_QUERY_REG8 (DEV_QUERY_REG0 + 8)
#define GENERAL_2D_CONTROL_REG 0x1041
#define SENSOR_SENSITIVITY_REG 0x1044
#define SENS_MAX_POS_MSB_REG 0x1046
#define SENS_MAX_POS_LSB_REG (SENS_MAX_POS_UPPER_REG + 1)
/* Register bits */
/* Device Control Register Bits */
#define REPORT_RATE_1ST_BIT 6
/* Interrupt Enable Register Bits (INTERRUPT_EN_REG) */
#define F10_ABS_INT_ENA 0
#define F10_REL_INT_ENA 1
#define F20_INT_ENA 2
/* Interrupt Request Register Bits (INT_REQ_STAT_REG | DEVICE_STATUS_REG) */
#define F10_ABS_INT_REQ 0
#define F10_REL_INT_REQ 1
#define F20_INT_REQ 2
/* Device Status Register Bits (DEVICE_STATUS_REG) */
#define STAT_CONFIGURED 6
#define STAT_ERROR 7
/* Device Command Register Bits (DEV_COMMAND_REG) */
#define RESET_COMMAND 0x01
#define REZERO_COMMAND 0x02
/* Data Register 0 Bits (DATA_REG0) */
#define GESTURE 3
/* Device Query Registers Bits */
/* DEV_QUERY_REG3 */
#define HAS_PALM_DETECT 1
#define HAS_MULTI_FING 2
#define HAS_SCROLLER 4
#define HAS_2D_SCROLL 5
/* General 2D Control Register Bits (GENERAL_2D_CONTROL_REG) */
#define NO_DECELERATION 1
#define REDUCE_REPORTING 3
#define NO_FILTER 5
/* Function Masks */
/* Device Control Register Masks (DEV_CONTROL_REG) */
#define REPORT_RATE_MSK 0xc0
#define SLEEP_MODE_MSK 0x07
/* Device Sleep Modes */
#define FULL_AWAKE 0x0
#define NORMAL_OP 0x1
#define LOW_PWR_OP 0x2
#define VERY_LOW_PWR_OP 0x3
#define SENS_SLEEP 0x4
#define SLEEP_MOD 0x5
#define DEEP_SLEEP 0x6
#define HIBERNATE 0x7
/* Interrupt Register Mask */
/* (INT_REQ_STAT_REG | DEVICE_STATUS_REG | INTERRUPT_EN_REG) */
#define INT_ENA_REQ_MSK 0x07
#define INT_ENA_ABS_MSK 0x01
#define INT_ENA_REL_MSK 0x02
#define INT_ENA_F20_MSK 0x04
/* Device Status Register Masks (DEVICE_STATUS_REG) */
#define CONFIGURED_MSK 0x40
#define ERROR_MSK 0x80
/* Data Register 0 Masks */
#define FINGER_WIDTH_MSK 0xf0
#define GESTURE_MSK 0x08
#define SENSOR_STATUS_MSK 0x07
/*
* MSB Position Register Masks
* ABS_MSB_X_REG | ABS_MSB_Y_REG | SENS_MAX_POS_MSB_REG |
* DEV_QUERY_REG3 | DEV_QUERY_REG5
*/
#define MSB_POSITION_MSK 0x1f
/* Device Query Registers Masks */
/* DEV_QUERY_REG2 */
#define NUM_EXTRA_POS_MSK 0x07
/* When in IRQ mode read the device every THREAD_IRQ_SLEEP_SECS */
#define THREAD_IRQ_SLEEP_SECS 2
#define THREAD_IRQ_SLEEP_MSECS (THREAD_IRQ_SLEEP_SECS * MSEC_PER_SEC)
/*
* When in Polling mode and no data received for NO_DATA_THRES msecs
* reduce the polling rate to NO_DATA_SLEEP_MSECS
*/
#define NO_DATA_THRES (MSEC_PER_SEC)
#define NO_DATA_SLEEP_MSECS (MSEC_PER_SEC / 4)
/* Control touchpad's No Deceleration option */
static bool no_decel = true;
module_param(no_decel, bool, 0644);
MODULE_PARM_DESC(no_decel, "No Deceleration. Default = 1 (on)");
/* Control touchpad's Reduced Reporting option */
static bool reduce_report;
module_param(reduce_report, bool, 0644);
MODULE_PARM_DESC(reduce_report, "Reduced Reporting. Default = 0 (off)");
/* Control touchpad's No Filter option */
static bool no_filter;
module_param(no_filter, bool, 0644);
MODULE_PARM_DESC(no_filter, "No Filter. Default = 0 (off)");
/*
* touchpad Attention line is Active Low and Open Drain,
* therefore should be connected to pulled up line
* and the irq configuration should be set to Falling Edge Trigger
*/
/* Control IRQ / Polling option */
static bool polling_req;
module_param(polling_req, bool, 0444);
MODULE_PARM_DESC(polling_req, "Request Polling. Default = 0 (use irq)");
/* Control Polling Rate */
static int scan_rate = 80;
module_param(scan_rate, int, 0644);
MODULE_PARM_DESC(scan_rate, "Polling rate in times/sec. Default = 80");
/* The main device structure */
struct synaptics_i2c {
struct i2c_client *client;
struct input_dev *input;
struct delayed_work dwork;
int no_data_count;
int no_decel_param;
int reduce_report_param;
int no_filter_param;
int scan_rate_param;
int scan_ms;
};
static inline void set_scan_rate(struct synaptics_i2c *touch, int scan_rate)
{
touch->scan_ms = MSEC_PER_SEC / scan_rate;
touch->scan_rate_param = scan_rate;
}
/*
* Driver's initial design makes no race condition possible on i2c bus,
* so there is no need in any locking.
* Keep it in mind, while playing with the code.
*/
static s32 synaptics_i2c_reg_get(struct i2c_client *client, u16 reg)
{
int ret;
ret = i2c_smbus_write_byte_data(client, PAGE_SEL_REG, reg >> 8);
if (ret == 0)
ret = i2c_smbus_read_byte_data(client, reg & 0xff);
return ret;
}
static s32 synaptics_i2c_reg_set(struct i2c_client *client, u16 reg, u8 val)
{
int ret;
ret = i2c_smbus_write_byte_data(client, PAGE_SEL_REG, reg >> 8);
if (ret == 0)
ret = i2c_smbus_write_byte_data(client, reg & 0xff, val);
return ret;
}
static s32 synaptics_i2c_word_get(struct i2c_client *client, u16 reg)
{
int ret;
ret = i2c_smbus_write_byte_data(client, PAGE_SEL_REG, reg >> 8);
if (ret == 0)
ret = i2c_smbus_read_word_data(client, reg & 0xff);
return ret;
}
static int synaptics_i2c_config(struct i2c_client *client)
{
int ret, control;
u8 int_en;
/* set Report Rate to Device Highest (>=80) and Sleep to normal */
ret = synaptics_i2c_reg_set(client, DEV_CONTROL_REG, 0xc1);
if (ret)
return ret;
/* set Interrupt Disable to Func20 / Enable to Func10) */
int_en = (polling_req) ? 0 : INT_ENA_ABS_MSK | INT_ENA_REL_MSK;
ret = synaptics_i2c_reg_set(client, INTERRUPT_EN_REG, int_en);
if (ret)
return ret;
control = synaptics_i2c_reg_get(client, GENERAL_2D_CONTROL_REG);
/* No Deceleration */
control |= no_decel ? 1 << NO_DECELERATION : 0;
/* Reduced Reporting */
control |= reduce_report ? 1 << REDUCE_REPORTING : 0;
/* No Filter */
control |= no_filter ? 1 << NO_FILTER : 0;
ret = synaptics_i2c_reg_set(client, GENERAL_2D_CONTROL_REG, control);
if (ret)
return ret;
return 0;
}
static int synaptics_i2c_reset_config(struct i2c_client *client)
{
int ret;
/* Reset the Touchpad */
ret = synaptics_i2c_reg_set(client, DEV_COMMAND_REG, RESET_COMMAND);
if (ret) {
dev_err(&client->dev, "Unable to reset device\n");
} else {
usleep_range(SOFT_RESET_DELAY_US, SOFT_RESET_DELAY_US + 100);
ret = synaptics_i2c_config(client);
if (ret)
dev_err(&client->dev, "Unable to config device\n");
}
return ret;
}
static int synaptics_i2c_check_error(struct i2c_client *client)
{
int status, ret = 0;
status = i2c_smbus_read_byte_data(client, DEVICE_STATUS_REG) &
(CONFIGURED_MSK | ERROR_MSK);
if (status != CONFIGURED_MSK)
ret = synaptics_i2c_reset_config(client);
return ret;
}
static bool synaptics_i2c_get_input(struct synaptics_i2c *touch)
{
struct input_dev *input = touch->input;
int xy_delta, gesture;
s32 data;
s8 x_delta, y_delta;
/* Deal with spontaneous resets and errors */
if (synaptics_i2c_check_error(touch->client))
return false;
/* Get Gesture Bit */
data = synaptics_i2c_reg_get(touch->client, DATA_REG0);
gesture = (data >> GESTURE) & 0x1;
/*
* Get Relative axes. we have to get them in one shot,
* so we get 2 bytes starting from REL_X_REG.
*/
xy_delta = synaptics_i2c_word_get(touch->client, REL_X_REG) & 0xffff;
/* Separate X from Y */
x_delta = xy_delta & 0xff;
y_delta = (xy_delta >> REGISTER_LENGTH) & 0xff;
/* Report the button event */
input_report_key(input, BTN_LEFT, gesture);
/* Report the deltas */
input_report_rel(input, REL_X, x_delta);
input_report_rel(input, REL_Y, -y_delta);
input_sync(input);
return xy_delta || gesture;
}
static irqreturn_t synaptics_i2c_irq(int irq, void *dev_id)
{
struct synaptics_i2c *touch = dev_id;
mod_delayed_work(system_wq, &touch->dwork, 0);
return IRQ_HANDLED;
}
static void synaptics_i2c_check_params(struct synaptics_i2c *touch)
{
bool reset = false;
if (scan_rate != touch->scan_rate_param)
set_scan_rate(touch, scan_rate);
if (no_decel != touch->no_decel_param) {
touch->no_decel_param = no_decel;
reset = true;
}
if (no_filter != touch->no_filter_param) {
touch->no_filter_param = no_filter;
reset = true;
}
if (reduce_report != touch->reduce_report_param) {
touch->reduce_report_param = reduce_report;
reset = true;
}
if (reset)
synaptics_i2c_reset_config(touch->client);
}
/* Control the Device polling rate / Work Handler sleep time */
static unsigned long synaptics_i2c_adjust_delay(struct synaptics_i2c *touch,
bool have_data)
{
unsigned long delay, nodata_count_thres;
if (polling_req) {
delay = touch->scan_ms;
if (have_data) {
touch->no_data_count = 0;
} else {
nodata_count_thres = NO_DATA_THRES / touch->scan_ms;
if (touch->no_data_count < nodata_count_thres)
touch->no_data_count++;
else
delay = NO_DATA_SLEEP_MSECS;
}
return msecs_to_jiffies(delay);
} else {
delay = msecs_to_jiffies(THREAD_IRQ_SLEEP_MSECS);
return round_jiffies_relative(delay);
}
}
/* Work Handler */
static void synaptics_i2c_work_handler(struct work_struct *work)
{
bool have_data;
struct synaptics_i2c *touch =
container_of(work, struct synaptics_i2c, dwork.work);
unsigned long delay;
synaptics_i2c_check_params(touch);
have_data = synaptics_i2c_get_input(touch);
delay = synaptics_i2c_adjust_delay(touch, have_data);
/*
* While interrupt driven, there is no real need to poll the device.
* But touchpads are very sensitive, so there could be errors
* related to physical environment and the attention line isn't
* necessarily asserted. In such case we can lose the touchpad.
* We poll the device once in THREAD_IRQ_SLEEP_SECS and
* if error is detected, we try to reset and reconfigure the touchpad.
*/
mod_delayed_work(system_wq, &touch->dwork, delay);
}
static int synaptics_i2c_open(struct input_dev *input)
{
struct synaptics_i2c *touch = input_get_drvdata(input);
int ret;
ret = synaptics_i2c_reset_config(touch->client);
if (ret)
return ret;
if (polling_req)
mod_delayed_work(system_wq, &touch->dwork,
msecs_to_jiffies(NO_DATA_SLEEP_MSECS));
return 0;
}
static void synaptics_i2c_close(struct input_dev *input)
{
struct synaptics_i2c *touch = input_get_drvdata(input);
if (!polling_req)
synaptics_i2c_reg_set(touch->client, INTERRUPT_EN_REG, 0);
cancel_delayed_work_sync(&touch->dwork);
/* Save some power */
synaptics_i2c_reg_set(touch->client, DEV_CONTROL_REG, DEEP_SLEEP);
}
static void synaptics_i2c_set_input_params(struct synaptics_i2c *touch)
{
struct input_dev *input = touch->input;
input->name = touch->client->name;
input->phys = touch->client->adapter->name;
input->id.bustype = BUS_I2C;
input->id.version = synaptics_i2c_word_get(touch->client,
INFO_QUERY_REG0);
input->dev.parent = &touch->client->dev;
input->open = synaptics_i2c_open;
input->close = synaptics_i2c_close;
input_set_drvdata(input, touch);
/* Register the device as mouse */
__set_bit(EV_REL, input->evbit);
__set_bit(REL_X, input->relbit);
__set_bit(REL_Y, input->relbit);
/* Register device's buttons and keys */
__set_bit(EV_KEY, input->evbit);
__set_bit(BTN_LEFT, input->keybit);
}
static struct synaptics_i2c *synaptics_i2c_touch_create(struct i2c_client *client)
{
struct synaptics_i2c *touch;
touch = kzalloc(sizeof(struct synaptics_i2c), GFP_KERNEL);
if (!touch)
return NULL;
touch->client = client;
touch->no_decel_param = no_decel;
touch->scan_rate_param = scan_rate;
set_scan_rate(touch, scan_rate);
INIT_DELAYED_WORK(&touch->dwork, synaptics_i2c_work_handler);
return touch;
}
static int synaptics_i2c_probe(struct i2c_client *client)
{
int ret;
struct synaptics_i2c *touch;
touch = synaptics_i2c_touch_create(client);
if (!touch)
return -ENOMEM;
ret = synaptics_i2c_reset_config(client);
if (ret)
goto err_mem_free;
if (client->irq < 1)
polling_req = true;
touch->input = input_allocate_device();
if (!touch->input) {
ret = -ENOMEM;
goto err_mem_free;
}
synaptics_i2c_set_input_params(touch);
if (!polling_req) {
dev_dbg(&touch->client->dev,
"Requesting IRQ: %d\n", touch->client->irq);
ret = request_irq(touch->client->irq, synaptics_i2c_irq,
IRQ_TYPE_EDGE_FALLING,
DRIVER_NAME, touch);
if (ret) {
dev_warn(&touch->client->dev,
"IRQ request failed: %d, "
"falling back to polling\n", ret);
polling_req = true;
synaptics_i2c_reg_set(touch->client,
INTERRUPT_EN_REG, 0);
}
}
if (polling_req)
dev_dbg(&touch->client->dev,
"Using polling at rate: %d times/sec\n", scan_rate);
/* Register the device in input subsystem */
ret = input_register_device(touch->input);
if (ret) {
dev_err(&client->dev,
"Input device register failed: %d\n", ret);
goto err_input_free;
}
i2c_set_clientdata(client, touch);
return 0;
err_input_free:
input_free_device(touch->input);
err_mem_free:
kfree(touch);
return ret;
}
static void synaptics_i2c_remove(struct i2c_client *client)
{
struct synaptics_i2c *touch = i2c_get_clientdata(client);
if (!polling_req)
free_irq(client->irq, touch);
input_unregister_device(touch->input);
kfree(touch);
}
static int synaptics_i2c_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct synaptics_i2c *touch = i2c_get_clientdata(client);
cancel_delayed_work_sync(&touch->dwork);
/* Save some power */
synaptics_i2c_reg_set(touch->client, DEV_CONTROL_REG, DEEP_SLEEP);
return 0;
}
static int synaptics_i2c_resume(struct device *dev)
{
int ret;
struct i2c_client *client = to_i2c_client(dev);
struct synaptics_i2c *touch = i2c_get_clientdata(client);
ret = synaptics_i2c_reset_config(client);
if (ret)
return ret;
mod_delayed_work(system_wq, &touch->dwork,
msecs_to_jiffies(NO_DATA_SLEEP_MSECS));
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(synaptics_i2c_pm, synaptics_i2c_suspend,
synaptics_i2c_resume);
static const struct i2c_device_id synaptics_i2c_id_table[] = {
{ "synaptics_i2c", 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, synaptics_i2c_id_table);
#ifdef CONFIG_OF
static const struct of_device_id synaptics_i2c_of_match[] = {
{ .compatible = "synaptics,synaptics_i2c", },
{ },
};
MODULE_DEVICE_TABLE(of, synaptics_i2c_of_match);
#endif
static struct i2c_driver synaptics_i2c_driver = {
.driver = {
.name = DRIVER_NAME,
.of_match_table = of_match_ptr(synaptics_i2c_of_match),
.pm = pm_sleep_ptr(&synaptics_i2c_pm),
},
.probe = synaptics_i2c_probe,
.remove = synaptics_i2c_remove,
.id_table = synaptics_i2c_id_table,
};
module_i2c_driver(synaptics_i2c_driver);
MODULE_DESCRIPTION("Synaptics I2C touchpad driver");
MODULE_AUTHOR("Mike Rapoport, Igor Grinberg, Compulab");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/mouse/synaptics_i2c.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Amiga mouse driver for Linux/m68k
*
* Copyright (c) 2000-2002 Vojtech Pavlik
*
* Based on the work of:
* Michael Rausch James Banks
* Matther Dillon David Giller
* Nathan Laredo Linus Torvalds
* Johan Myreen Jes Sorensen
* Russell King
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <asm/irq.h>
#include <asm/setup.h>
#include <linux/uaccess.h>
#include <asm/amigahw.h>
#include <asm/amigaints.h>
MODULE_AUTHOR("Vojtech Pavlik <[email protected]>");
MODULE_DESCRIPTION("Amiga mouse driver");
MODULE_LICENSE("GPL");
static int amimouse_lastx, amimouse_lasty;
static irqreturn_t amimouse_interrupt(int irq, void *data)
{
struct input_dev *dev = data;
unsigned short joy0dat, potgor;
int nx, ny, dx, dy;
joy0dat = amiga_custom.joy0dat;
nx = joy0dat & 0xff;
ny = joy0dat >> 8;
dx = nx - amimouse_lastx;
dy = ny - amimouse_lasty;
if (dx < -127) dx = (256 + nx) - amimouse_lastx;
if (dx > 127) dx = (nx - 256) - amimouse_lastx;
if (dy < -127) dy = (256 + ny) - amimouse_lasty;
if (dy > 127) dy = (ny - 256) - amimouse_lasty;
amimouse_lastx = nx;
amimouse_lasty = ny;
potgor = amiga_custom.potgor;
input_report_rel(dev, REL_X, dx);
input_report_rel(dev, REL_Y, dy);
input_report_key(dev, BTN_LEFT, ciaa.pra & 0x40);
input_report_key(dev, BTN_MIDDLE, potgor & 0x0100);
input_report_key(dev, BTN_RIGHT, potgor & 0x0400);
input_sync(dev);
return IRQ_HANDLED;
}
static int amimouse_open(struct input_dev *dev)
{
unsigned short joy0dat;
int error;
joy0dat = amiga_custom.joy0dat;
amimouse_lastx = joy0dat & 0xff;
amimouse_lasty = joy0dat >> 8;
error = request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse",
dev);
if (error)
dev_err(&dev->dev, "Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
return error;
}
static void amimouse_close(struct input_dev *dev)
{
free_irq(IRQ_AMIGA_VERTB, dev);
}
static int __init amimouse_probe(struct platform_device *pdev)
{
int err;
struct input_dev *dev;
dev = input_allocate_device();
if (!dev)
return -ENOMEM;
dev->name = pdev->name;
dev->phys = "amimouse/input0";
dev->id.bustype = BUS_AMIGA;
dev->id.vendor = 0x0001;
dev->id.product = 0x0002;
dev->id.version = 0x0100;
dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
dev->open = amimouse_open;
dev->close = amimouse_close;
dev->dev.parent = &pdev->dev;
err = input_register_device(dev);
if (err) {
input_free_device(dev);
return err;
}
platform_set_drvdata(pdev, dev);
return 0;
}
static int __exit amimouse_remove(struct platform_device *pdev)
{
struct input_dev *dev = platform_get_drvdata(pdev);
input_unregister_device(dev);
return 0;
}
static struct platform_driver amimouse_driver = {
.remove = __exit_p(amimouse_remove),
.driver = {
.name = "amiga-mouse",
},
};
module_platform_driver_probe(amimouse_driver, amimouse_probe);
MODULE_ALIAS("platform:amiga-mouse");
|
linux-master
|
drivers/input/mouse/amimouse.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Synaptics TouchPad PS/2 mouse driver
*
* 2003 Dmitry Torokhov <[email protected]>
* Added support for pass-through port. Special thanks to Peter Berg Larsen
* for explaining various Synaptics quirks.
*
* 2003 Peter Osterlund <[email protected]>
* Ported to 2.5 input device infrastructure.
*
* Copyright (C) 2001 Stefan Gmeiner <[email protected]>
* start merging tpconfig and gpm code to a xfree-input module
* adding some changes and extensions (ex. 3rd and 4th button)
*
* Copyright (c) 1997 C. Scott Ananian <[email protected]>
* Copyright (c) 1998-2000 Bruce Kalk <[email protected]>
* code for the special synaptics commands (from the tpconfig-source)
*
* Trademarks are the property of their respective owners.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/dmi.h>
#include <linux/input/mt.h>
#include <linux/serio.h>
#include <linux/libps2.h>
#include <linux/rmi.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include "psmouse.h"
#include "synaptics.h"
/*
* The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
* section 2.3.2, which says that they should be valid regardless of the
* actual size of the sensor.
* Note that newer firmware allows querying device for maximum useable
* coordinates.
*/
#define XMIN 0
#define XMAX 6143
#define YMIN 0
#define YMAX 6143
#define XMIN_NOMINAL 1472
#define XMAX_NOMINAL 5472
#define YMIN_NOMINAL 1408
#define YMAX_NOMINAL 4448
/* Size in bits of absolute position values reported by the hardware */
#define ABS_POS_BITS 13
/*
* These values should represent the absolute maximum value that will
* be reported for a positive position value. Some Synaptics firmware
* uses this value to indicate a finger near the edge of the touchpad
* whose precise position cannot be determined.
*
* At least one touchpad is known to report positions in excess of this
* value which are actually negative values truncated to the 13-bit
* reporting range. These values have never been observed to be lower
* than 8184 (i.e. -8), so we treat all values greater than 8176 as
* negative and any other value as positive.
*/
#define X_MAX_POSITIVE 8176
#define Y_MAX_POSITIVE 8176
/* maximum ABS_MT_POSITION displacement (in mm) */
#define DMAX 10
/*****************************************************************************
* Stuff we need even when we do not want native Synaptics support
****************************************************************************/
/*
* Set the synaptics touchpad mode byte by special commands
*/
static int synaptics_mode_cmd(struct psmouse *psmouse, u8 mode)
{
u8 param[1];
int error;
error = ps2_sliced_command(&psmouse->ps2dev, mode);
if (error)
return error;
param[0] = SYN_PS_SET_MODE2;
error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE);
if (error)
return error;
return 0;
}
int synaptics_detect(struct psmouse *psmouse, bool set_properties)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param[4] = { 0 };
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
if (param[1] != 0x47)
return -ENODEV;
if (set_properties) {
psmouse->vendor = "Synaptics";
psmouse->name = "TouchPad";
}
return 0;
}
void synaptics_reset(struct psmouse *psmouse)
{
/* reset touchpad back to relative mode, gestures enabled */
synaptics_mode_cmd(psmouse, 0);
}
#if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
/* This list has been kindly provided by Synaptics. */
static const char * const topbuttonpad_pnp_ids[] = {
"LEN0017",
"LEN0018",
"LEN0019",
"LEN0023",
"LEN002A",
"LEN002B",
"LEN002C",
"LEN002D",
"LEN002E",
"LEN0033", /* Helix */
"LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
"LEN0035", /* X240 */
"LEN0036", /* T440 */
"LEN0037", /* X1 Carbon 2nd */
"LEN0038",
"LEN0039", /* T440s */
"LEN0041",
"LEN0042", /* Yoga */
"LEN0045",
"LEN0047",
"LEN2000", /* S540 */
"LEN2001", /* Edge E431 */
"LEN2002", /* Edge E531 */
"LEN2003",
"LEN2004", /* L440 */
"LEN2005",
"LEN2006", /* Edge E440/E540 */
"LEN2007",
"LEN2008",
"LEN2009",
"LEN200A",
"LEN200B",
NULL
};
static const char * const smbus_pnp_ids[] = {
/* all of the topbuttonpad_pnp_ids are valid, we just add some extras */
"LEN0048", /* X1 Carbon 3 */
"LEN0046", /* X250 */
"LEN0049", /* Yoga 11e */
"LEN004a", /* W541 */
"LEN005b", /* P50 */
"LEN005e", /* T560 */
"LEN006c", /* T470s */
"LEN007a", /* T470s */
"LEN0071", /* T480 */
"LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
"LEN0073", /* X1 Carbon G5 (Elantech) */
"LEN0091", /* X1 Carbon 6 */
"LEN0092", /* X1 Carbon 6 */
"LEN0093", /* T480 */
"LEN0096", /* X280 */
"LEN0097", /* X280 -> ALPS trackpoint */
"LEN0099", /* X1 Extreme Gen 1 / P1 Gen 1 */
"LEN009b", /* T580 */
"LEN0402", /* X1 Extreme Gen 2 / P1 Gen 2 */
"LEN040f", /* P1 Gen 3 */
"LEN200f", /* T450s */
"LEN2044", /* L470 */
"LEN2054", /* E480 */
"LEN2055", /* E580 */
"LEN2068", /* T14 Gen 1 */
"SYN3052", /* HP EliteBook 840 G4 */
"SYN3221", /* HP 15-ay000 */
"SYN323d", /* HP Spectre X360 13-w013dx */
"SYN3257", /* HP Envy 13-ad105ng */
NULL
};
static const char * const forcepad_pnp_ids[] = {
"SYN300D",
"SYN3014",
NULL
};
/*
* Send a command to the synaptics touchpad by special commands
*/
static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
{
int error;
error = ps2_sliced_command(&psmouse->ps2dev, cmd);
if (error)
return error;
error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
if (error)
return error;
return 0;
}
static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
{
int error;
union {
__be32 be_val;
char buf[4];
} resp = { 0 };
error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
if (error)
return error;
*val = be32_to_cpu(resp.be_val);
return 0;
}
/*
* Identify Touchpad
* See also the SYN_ID_* macros
*/
static int synaptics_identify(struct psmouse *psmouse,
struct synaptics_device_info *info)
{
int error;
error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
if (error)
return error;
return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
}
/*
* Read the model-id bytes from the touchpad
* see also SYN_MODEL_* macros
*/
static int synaptics_model_id(struct psmouse *psmouse,
struct synaptics_device_info *info)
{
return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
}
/*
* Read the firmware id from the touchpad
*/
static int synaptics_firmware_id(struct psmouse *psmouse,
struct synaptics_device_info *info)
{
return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
&info->firmware_id);
}
/*
* Read the board id and the "More Extended Queries" from the touchpad
* The board id is encoded in the "QUERY MODES" response
*/
static int synaptics_query_modes(struct psmouse *psmouse,
struct synaptics_device_info *info)
{
u8 bid[3];
int error;
/* firmwares prior 7.5 have no board_id encoded */
if (SYN_ID_FULL(info->identity) < 0x705)
return 0;
error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
if (error)
return error;
info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
if (SYN_MEXT_CAP_BIT(bid[0]))
return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
&info->ext_cap_10);
return 0;
}
/*
* Read the capability-bits from the touchpad
* see also the SYN_CAP_* macros
*/
static int synaptics_capability(struct psmouse *psmouse,
struct synaptics_device_info *info)
{
int error;
error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
&info->capabilities);
if (error)
return error;
info->ext_cap = info->ext_cap_0c = 0;
/*
* Older firmwares had submodel ID fixed to 0x47
*/
if (SYN_ID_FULL(info->identity) < 0x705 &&
SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
return -ENXIO;
}
/*
* Unless capExtended is set the rest of the flags should be ignored
*/
if (!SYN_CAP_EXTENDED(info->capabilities))
info->capabilities = 0;
if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
&info->ext_cap);
if (error) {
psmouse_warn(psmouse,
"device claims to have extended capabilities, but I'm not able to read them.\n");
} else {
/*
* if nExtBtn is greater than 8 it should be considered
* invalid and treated as 0
*/
if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
info->ext_cap &= ~SYN_CAP_MB_MASK;
}
}
if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
&info->ext_cap_0c);
if (error)
psmouse_warn(psmouse,
"device claims to have extended capability 0x0c, but I'm not able to read it.\n");
}
return 0;
}
/*
* Read touchpad resolution and maximum reported coordinates
* Resolution is left zero if touchpad does not support the query
*/
static int synaptics_resolution(struct psmouse *psmouse,
struct synaptics_device_info *info)
{
u8 resp[3];
int error;
if (SYN_ID_MAJOR(info->identity) < 4)
return 0;
error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
if (!error) {
if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
info->x_res = resp[0]; /* x resolution in units/mm */
info->y_res = resp[2]; /* y resolution in units/mm */
}
}
if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
error = synaptics_send_cmd(psmouse,
SYN_QUE_EXT_MAX_COORDS, resp);
if (error) {
psmouse_warn(psmouse,
"device claims to have max coordinates query, but I'm not able to read it.\n");
} else {
info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
psmouse_info(psmouse,
"queried max coordinates: x [..%d], y [..%d]\n",
info->x_max, info->y_max);
}
}
if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
(SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
/*
* Firmware v8.1 does not report proper number of extended
* capabilities, but has been proven to report correct min
* coordinates.
*/
SYN_ID_FULL(info->identity) == 0x801)) {
error = synaptics_send_cmd(psmouse,
SYN_QUE_EXT_MIN_COORDS, resp);
if (error) {
psmouse_warn(psmouse,
"device claims to have min coordinates query, but I'm not able to read it.\n");
} else {
info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
psmouse_info(psmouse,
"queried min coordinates: x [%d..], y [%d..]\n",
info->x_min, info->y_min);
}
}
return 0;
}
static int synaptics_query_hardware(struct psmouse *psmouse,
struct synaptics_device_info *info)
{
int error;
memset(info, 0, sizeof(*info));
error = synaptics_identify(psmouse, info);
if (error)
return error;
error = synaptics_model_id(psmouse, info);
if (error)
return error;
error = synaptics_firmware_id(psmouse, info);
if (error)
return error;
error = synaptics_query_modes(psmouse, info);
if (error)
return error;
error = synaptics_capability(psmouse, info);
if (error)
return error;
error = synaptics_resolution(psmouse, info);
if (error)
return error;
return 0;
}
#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
static bool cr48_profile_sensor;
#define ANY_BOARD_ID 0
struct min_max_quirk {
const char * const *pnp_ids;
struct {
u32 min, max;
} board_id;
u32 x_min, x_max, y_min, y_max;
};
static const struct min_max_quirk min_max_pnpid_table[] = {
{
(const char * const []){"LEN0033", NULL},
{ANY_BOARD_ID, ANY_BOARD_ID},
1024, 5052, 2258, 4832
},
{
(const char * const []){"LEN0042", NULL},
{ANY_BOARD_ID, ANY_BOARD_ID},
1232, 5710, 1156, 4696
},
{
(const char * const []){"LEN0034", "LEN0036", "LEN0037",
"LEN0039", "LEN2002", "LEN2004",
NULL},
{ANY_BOARD_ID, 2961},
1024, 5112, 2024, 4832
},
{
(const char * const []){"LEN2000", NULL},
{ANY_BOARD_ID, ANY_BOARD_ID},
1024, 5113, 2021, 4832
},
{
(const char * const []){"LEN2001", NULL},
{ANY_BOARD_ID, ANY_BOARD_ID},
1024, 5022, 2508, 4832
},
{
(const char * const []){"LEN2006", NULL},
{2691, 2691},
1024, 5045, 2457, 4832
},
{
(const char * const []){"LEN2006", NULL},
{ANY_BOARD_ID, ANY_BOARD_ID},
1264, 5675, 1171, 4688
},
{ }
};
/*****************************************************************************
* Synaptics communications functions
****************************************************************************/
/*
* Synaptics touchpads report the y coordinate from bottom to top, which is
* opposite from what userspace expects.
* This function is used to invert y before reporting.
*/
static int synaptics_invert_y(int y)
{
return YMAX_NOMINAL + YMIN_NOMINAL - y;
}
/*
* Apply quirk(s) if the hardware matches
*/
static void synaptics_apply_quirks(struct psmouse *psmouse,
struct synaptics_device_info *info)
{
int i;
for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
if (!psmouse_matches_pnp_id(psmouse,
min_max_pnpid_table[i].pnp_ids))
continue;
if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
info->board_id < min_max_pnpid_table[i].board_id.min)
continue;
if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
info->board_id > min_max_pnpid_table[i].board_id.max)
continue;
info->x_min = min_max_pnpid_table[i].x_min;
info->x_max = min_max_pnpid_table[i].x_max;
info->y_min = min_max_pnpid_table[i].y_min;
info->y_max = min_max_pnpid_table[i].y_max;
psmouse_info(psmouse,
"quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
info->x_min, info->x_max,
info->y_min, info->y_max);
break;
}
}
static bool synaptics_has_agm(struct synaptics_data *priv)
{
return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
}
static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
{
static u8 param = 0xc8;
int error;
error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
if (error)
return error;
error = ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE);
if (error)
return error;
return 0;
}
static int synaptics_set_mode(struct psmouse *psmouse)
{
struct synaptics_data *priv = psmouse->private;
int error;
priv->mode = 0;
if (priv->absolute_mode)
priv->mode |= SYN_BIT_ABSOLUTE_MODE;
if (priv->disable_gesture)
priv->mode |= SYN_BIT_DISABLE_GESTURE;
if (psmouse->rate >= 80)
priv->mode |= SYN_BIT_HIGH_RATE;
if (SYN_CAP_EXTENDED(priv->info.capabilities))
priv->mode |= SYN_BIT_W_MODE;
error = synaptics_mode_cmd(psmouse, priv->mode);
if (error)
return error;
if (priv->absolute_mode && synaptics_has_agm(priv)) {
error = synaptics_set_advanced_gesture_mode(psmouse);
if (error) {
psmouse_err(psmouse,
"Advanced gesture mode init failed: %d\n",
error);
return error;
}
}
return 0;
}
static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
{
struct synaptics_data *priv = psmouse->private;
if (rate >= 80) {
priv->mode |= SYN_BIT_HIGH_RATE;
psmouse->rate = 80;
} else {
priv->mode &= ~SYN_BIT_HIGH_RATE;
psmouse->rate = 40;
}
synaptics_mode_cmd(psmouse, priv->mode);
}
/*****************************************************************************
* Synaptics pass-through PS/2 port support
****************************************************************************/
static int synaptics_pt_write(struct serio *serio, u8 c)
{
struct psmouse *parent = psmouse_from_serio(serio->parent);
u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
int error;
error = ps2_sliced_command(&parent->ps2dev, c);
if (error)
return error;
error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
if (error)
return error;
return 0;
}
static int synaptics_pt_start(struct serio *serio)
{
struct psmouse *parent = psmouse_from_serio(serio->parent);
struct synaptics_data *priv = parent->private;
serio_pause_rx(parent->ps2dev.serio);
priv->pt_port = serio;
serio_continue_rx(parent->ps2dev.serio);
return 0;
}
static void synaptics_pt_stop(struct serio *serio)
{
struct psmouse *parent = psmouse_from_serio(serio->parent);
struct synaptics_data *priv = parent->private;
serio_pause_rx(parent->ps2dev.serio);
priv->pt_port = NULL;
serio_continue_rx(parent->ps2dev.serio);
}
static int synaptics_is_pt_packet(u8 *buf)
{
return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
}
static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
{
struct psmouse *child = psmouse_from_serio(ptport);
if (child && child->state == PSMOUSE_ACTIVATED) {
serio_interrupt(ptport, packet[1], 0);
serio_interrupt(ptport, packet[4], 0);
serio_interrupt(ptport, packet[5], 0);
if (child->pktsize == 4)
serio_interrupt(ptport, packet[2], 0);
} else {
serio_interrupt(ptport, packet[1], 0);
}
}
static void synaptics_pt_activate(struct psmouse *psmouse)
{
struct synaptics_data *priv = psmouse->private;
struct psmouse *child = psmouse_from_serio(priv->pt_port);
/* adjust the touchpad to child's choice of protocol */
if (child) {
if (child->pktsize == 4)
priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
else
priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
if (synaptics_mode_cmd(psmouse, priv->mode))
psmouse_warn(psmouse,
"failed to switch guest protocol\n");
}
}
static void synaptics_pt_create(struct psmouse *psmouse)
{
struct serio *serio;
serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
if (!serio) {
psmouse_err(psmouse,
"not enough memory for pass-through port\n");
return;
}
serio->id.type = SERIO_PS_PSTHRU;
strscpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
strscpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
serio->write = synaptics_pt_write;
serio->start = synaptics_pt_start;
serio->stop = synaptics_pt_stop;
serio->parent = psmouse->ps2dev.serio;
psmouse->pt_activate = synaptics_pt_activate;
psmouse_info(psmouse, "serio: %s port at %s\n",
serio->name, psmouse->phys);
serio_register_port(serio);
}
/*****************************************************************************
* Functions to interpret the absolute mode packets
****************************************************************************/
static void synaptics_parse_agm(const u8 buf[],
struct synaptics_data *priv,
struct synaptics_hw_state *hw)
{
struct synaptics_hw_state *agm = &priv->agm;
int agm_packet_type;
agm_packet_type = (buf[5] & 0x30) >> 4;
switch (agm_packet_type) {
case 1:
/* Gesture packet: (x, y, z) half resolution */
agm->w = hw->w;
agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
break;
case 2:
/* AGM-CONTACT packet: we are only interested in the count */
priv->agm_count = buf[1];
break;
default:
break;
}
}
static void synaptics_parse_ext_buttons(const u8 buf[],
struct synaptics_data *priv,
struct synaptics_hw_state *hw)
{
unsigned int ext_bits =
(SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
hw->ext_buttons = buf[4] & ext_mask;
hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
}
static int synaptics_parse_hw_state(const u8 buf[],
struct synaptics_data *priv,
struct synaptics_hw_state *hw)
{
memset(hw, 0, sizeof(struct synaptics_hw_state));
if (SYN_MODEL_NEWABS(priv->info.model_id)) {
hw->w = (((buf[0] & 0x30) >> 2) |
((buf[0] & 0x04) >> 1) |
((buf[3] & 0x04) >> 2));
if (synaptics_has_agm(priv) && hw->w == 2) {
synaptics_parse_agm(buf, priv, hw);
return 1;
}
hw->x = (((buf[3] & 0x10) << 8) |
((buf[1] & 0x0f) << 8) |
buf[4]);
hw->y = (((buf[3] & 0x20) << 7) |
((buf[1] & 0xf0) << 4) |
buf[5]);
hw->z = buf[2];
hw->left = (buf[0] & 0x01) ? 1 : 0;
hw->right = (buf[0] & 0x02) ? 1 : 0;
if (priv->is_forcepad) {
/*
* ForcePads, like Clickpads, use middle button
* bits to report primary button clicks.
* Unfortunately they report primary button not
* only when user presses on the pad above certain
* threshold, but also when there are more than one
* finger on the touchpad, which interferes with
* out multi-finger gestures.
*/
if (hw->z == 0) {
/* No contacts */
priv->press = priv->report_press = false;
} else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
/*
* Single-finger touch with pressure above
* the threshold. If pressure stays long
* enough, we'll start reporting primary
* button. We rely on the device continuing
* sending data even if finger does not
* move.
*/
if (!priv->press) {
priv->press_start = jiffies;
priv->press = true;
} else if (time_after(jiffies,
priv->press_start +
msecs_to_jiffies(50))) {
priv->report_press = true;
}
} else {
priv->press = false;
}
hw->left = priv->report_press;
} else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
/*
* Clickpad's button is transmitted as middle button,
* however, since it is primary button, we will report
* it as BTN_LEFT.
*/
hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
} else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
if (hw->w == 2)
hw->scroll = (s8)buf[1];
}
if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
}
if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
((buf[0] ^ buf[3]) & 0x02)) {
synaptics_parse_ext_buttons(buf, priv, hw);
}
} else {
hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
hw->left = (buf[0] & 0x01) ? 1 : 0;
hw->right = (buf[0] & 0x02) ? 1 : 0;
}
/*
* Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
* is used by some firmware to indicate a finger at the edge of
* the touchpad whose precise position cannot be determined, so
* convert these values to the maximum axis value.
*/
if (hw->x > X_MAX_POSITIVE)
hw->x -= 1 << ABS_POS_BITS;
else if (hw->x == X_MAX_POSITIVE)
hw->x = XMAX;
if (hw->y > Y_MAX_POSITIVE)
hw->y -= 1 << ABS_POS_BITS;
else if (hw->y == Y_MAX_POSITIVE)
hw->y = YMAX;
return 0;
}
static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
bool active, int x, int y)
{
input_mt_slot(dev, slot);
input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
if (active) {
input_report_abs(dev, ABS_MT_POSITION_X, x);
input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
}
}
static void synaptics_report_semi_mt_data(struct input_dev *dev,
const struct synaptics_hw_state *a,
const struct synaptics_hw_state *b,
int num_fingers)
{
if (num_fingers >= 2) {
synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
min(a->y, b->y));
synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
max(a->y, b->y));
} else if (num_fingers == 1) {
synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
} else {
synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
}
}
static void synaptics_report_ext_buttons(struct psmouse *psmouse,
const struct synaptics_hw_state *hw)
{
struct input_dev *dev = psmouse->dev;
struct synaptics_data *priv = psmouse->private;
int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
int i;
if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
return;
/* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
SYN_ID_FULL(priv->info.identity) == 0x802) &&
!((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
return;
if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
for (i = 0; i < ext_bits; i++) {
input_report_key(dev, BTN_0 + 2 * i,
hw->ext_buttons & BIT(i));
input_report_key(dev, BTN_1 + 2 * i,
hw->ext_buttons & BIT(i + ext_bits));
}
return;
}
/*
* This generation of touchpads has the trackstick buttons
* physically wired to the touchpad. Re-route them through
* the pass-through interface.
*/
if (priv->pt_port) {
u8 pt_buttons;
/* The trackstick expects at most 3 buttons */
pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) |
SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
serio_interrupt(priv->pt_port,
PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
}
}
static void synaptics_report_buttons(struct psmouse *psmouse,
const struct synaptics_hw_state *hw)
{
struct input_dev *dev = psmouse->dev;
struct synaptics_data *priv = psmouse->private;
input_report_key(dev, BTN_LEFT, hw->left);
input_report_key(dev, BTN_RIGHT, hw->right);
if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
input_report_key(dev, BTN_MIDDLE, hw->middle);
if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
input_report_key(dev, BTN_FORWARD, hw->up);
input_report_key(dev, BTN_BACK, hw->down);
}
synaptics_report_ext_buttons(psmouse, hw);
}
static void synaptics_report_mt_data(struct psmouse *psmouse,
const struct synaptics_hw_state *sgm,
int num_fingers)
{
struct input_dev *dev = psmouse->dev;
struct synaptics_data *priv = psmouse->private;
const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
struct input_mt_pos pos[2];
int slot[2], nsemi, i;
nsemi = clamp_val(num_fingers, 0, 2);
for (i = 0; i < nsemi; i++) {
pos[i].x = hw[i]->x;
pos[i].y = synaptics_invert_y(hw[i]->y);
}
input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
for (i = 0; i < nsemi; i++) {
input_mt_slot(dev, slot[i]);
input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
}
input_mt_drop_unused(dev);
/* Don't use active slot count to generate BTN_TOOL events. */
input_mt_report_pointer_emulation(dev, false);
/* Send the number of fingers reported by touchpad itself. */
input_mt_report_finger_count(dev, num_fingers);
synaptics_report_buttons(psmouse, sgm);
input_sync(dev);
}
static void synaptics_image_sensor_process(struct psmouse *psmouse,
struct synaptics_hw_state *sgm)
{
struct synaptics_data *priv = psmouse->private;
int num_fingers;
/*
* Update mt_state using the new finger count and current mt_state.
*/
if (sgm->z == 0)
num_fingers = 0;
else if (sgm->w >= 4)
num_fingers = 1;
else if (sgm->w == 0)
num_fingers = 2;
else if (sgm->w == 1)
num_fingers = priv->agm_count ? priv->agm_count : 3;
else
num_fingers = 4;
/* Send resulting input events to user space */
synaptics_report_mt_data(psmouse, sgm, num_fingers);
}
static bool synaptics_has_multifinger(struct synaptics_data *priv)
{
if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
return true;
/* Advanced gesture mode also sends multi finger data */
return synaptics_has_agm(priv);
}
/*
* called for each full received packet from the touchpad
*/
static void synaptics_process_packet(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
struct synaptics_data *priv = psmouse->private;
struct synaptics_device_info *info = &priv->info;
struct synaptics_hw_state hw;
int num_fingers;
int finger_width;
if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
return;
if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
synaptics_image_sensor_process(psmouse, &hw);
return;
}
if (hw.scroll) {
priv->scroll += hw.scroll;
while (priv->scroll >= 4) {
input_report_key(dev, BTN_BACK, !hw.down);
input_sync(dev);
input_report_key(dev, BTN_BACK, hw.down);
input_sync(dev);
priv->scroll -= 4;
}
while (priv->scroll <= -4) {
input_report_key(dev, BTN_FORWARD, !hw.up);
input_sync(dev);
input_report_key(dev, BTN_FORWARD, hw.up);
input_sync(dev);
priv->scroll += 4;
}
return;
}
if (hw.z > 0 && hw.x > 1) {
num_fingers = 1;
finger_width = 5;
if (SYN_CAP_EXTENDED(info->capabilities)) {
switch (hw.w) {
case 0 ... 1:
if (synaptics_has_multifinger(priv))
num_fingers = hw.w + 2;
break;
case 2:
/*
* SYN_MODEL_PEN(info->model_id): even if
* the device supports pen, we treat it as
* a single finger.
*/
break;
case 4 ... 15:
if (SYN_CAP_PALMDETECT(info->capabilities))
finger_width = hw.w;
break;
}
}
} else {
num_fingers = 0;
finger_width = 0;
}
if (cr48_profile_sensor) {
synaptics_report_mt_data(psmouse, &hw, num_fingers);
return;
}
if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
num_fingers);
/* Post events
* BTN_TOUCH has to be first as mousedev relies on it when doing
* absolute -> relative conversion
*/
if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
if (num_fingers > 0) {
input_report_abs(dev, ABS_X, hw.x);
input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
}
input_report_abs(dev, ABS_PRESSURE, hw.z);
if (SYN_CAP_PALMDETECT(info->capabilities))
input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
if (synaptics_has_multifinger(priv)) {
input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
}
synaptics_report_buttons(psmouse, &hw);
input_sync(dev);
}
static bool synaptics_validate_byte(struct psmouse *psmouse,
int idx, enum synaptics_pkt_type pkt_type)
{
static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
const u8 *packet = psmouse->packet;
if (idx < 0 || idx > 4)
return false;
switch (pkt_type) {
case SYN_NEWABS:
case SYN_NEWABS_RELAXED:
return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
case SYN_NEWABS_STRICT:
return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
case SYN_OLDABS:
return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
default:
psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
return false;
}
}
static enum synaptics_pkt_type
synaptics_detect_pkt_type(struct psmouse *psmouse)
{
int i;
for (i = 0; i < 5; i++) {
if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
psmouse_info(psmouse, "using relaxed packet validation\n");
return SYN_NEWABS_RELAXED;
}
}
return SYN_NEWABS_STRICT;
}
static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
{
struct synaptics_data *priv = psmouse->private;
if (psmouse->pktcnt >= 6) { /* Full packet received */
if (unlikely(priv->pkt_type == SYN_NEWABS))
priv->pkt_type = synaptics_detect_pkt_type(psmouse);
if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
synaptics_is_pt_packet(psmouse->packet)) {
if (priv->pt_port)
synaptics_pass_pt_packet(priv->pt_port,
psmouse->packet);
} else
synaptics_process_packet(psmouse);
return PSMOUSE_FULL_PACKET;
}
return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
}
/*****************************************************************************
* Driver initialization/cleanup functions
****************************************************************************/
static void set_abs_position_params(struct input_dev *dev,
struct synaptics_device_info *info,
int x_code, int y_code)
{
int x_min = info->x_min ?: XMIN_NOMINAL;
int x_max = info->x_max ?: XMAX_NOMINAL;
int y_min = info->y_min ?: YMIN_NOMINAL;
int y_max = info->y_max ?: YMAX_NOMINAL;
int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
SYN_REDUCED_FILTER_FUZZ : 0;
input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
input_abs_set_res(dev, x_code, info->x_res);
input_abs_set_res(dev, y_code, info->y_res);
}
static int set_input_params(struct psmouse *psmouse,
struct synaptics_data *priv)
{
struct input_dev *dev = psmouse->dev;
struct synaptics_device_info *info = &priv->info;
int i;
int error;
/* Reset default psmouse capabilities */
__clear_bit(EV_REL, dev->evbit);
bitmap_zero(dev->relbit, REL_CNT);
bitmap_zero(dev->keybit, KEY_CNT);
/* Things that apply to both modes */
__set_bit(INPUT_PROP_POINTER, dev->propbit);
input_set_capability(dev, EV_KEY, BTN_LEFT);
/* Clickpads report only left button */
if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
input_set_capability(dev, EV_KEY, BTN_RIGHT);
if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
input_set_capability(dev, EV_KEY, BTN_MIDDLE);
}
if (!priv->absolute_mode) {
/* Relative mode */
input_set_capability(dev, EV_REL, REL_X);
input_set_capability(dev, EV_REL, REL_Y);
return 0;
}
/* Absolute mode */
set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
if (cr48_profile_sensor)
input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
set_abs_position_params(dev, info,
ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
/* Image sensors can report per-contact pressure */
input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
error = input_mt_init_slots(dev, 2,
INPUT_MT_POINTER | INPUT_MT_TRACK);
if (error)
return error;
/* Image sensors can signal 4 and 5 finger clicks */
input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
} else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
set_abs_position_params(dev, info,
ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
/*
* Profile sensor in CR-48 tracks contacts reasonably well,
* other non-image sensors with AGM use semi-mt.
*/
error = input_mt_init_slots(dev, 2,
INPUT_MT_POINTER |
(cr48_profile_sensor ?
INPUT_MT_TRACK :
INPUT_MT_SEMI_MT));
if (error)
return error;
/*
* For semi-mt devices we send ABS_X/Y ourselves instead of
* input_mt_report_pointer_emulation. But
* input_mt_init_slots() resets the fuzz to 0, leading to a
* filtered ABS_MT_POSITION_X but an unfiltered ABS_X
* position. Let's re-initialize ABS_X/Y here.
*/
if (!cr48_profile_sensor)
set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
}
if (SYN_CAP_PALMDETECT(info->capabilities))
input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
input_set_capability(dev, EV_KEY, BTN_TOUCH);
input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
if (synaptics_has_multifinger(priv)) {
input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
}
if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
input_set_capability(dev, EV_KEY, BTN_FORWARD);
input_set_capability(dev, EV_KEY, BTN_BACK);
}
if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
input_set_capability(dev, EV_KEY, BTN_0 + i);
if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
__set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
__set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
}
return 0;
}
static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
void *data, char *buf)
{
struct synaptics_data *priv = psmouse->private;
return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
}
static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
void *data, const char *buf,
size_t len)
{
struct synaptics_data *priv = psmouse->private;
unsigned int value;
int err;
err = kstrtouint(buf, 10, &value);
if (err)
return err;
if (value > 1)
return -EINVAL;
if (value == priv->disable_gesture)
return len;
priv->disable_gesture = value;
if (value)
priv->mode |= SYN_BIT_DISABLE_GESTURE;
else
priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
if (synaptics_mode_cmd(psmouse, priv->mode))
return -EIO;
return len;
}
PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
synaptics_show_disable_gesture,
synaptics_set_disable_gesture);
static void synaptics_disconnect(struct psmouse *psmouse)
{
struct synaptics_data *priv = psmouse->private;
/*
* We might have left a breadcrumb when trying to
* set up SMbus companion.
*/
psmouse_smbus_cleanup(psmouse);
if (!priv->absolute_mode &&
SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
device_remove_file(&psmouse->ps2dev.serio->dev,
&psmouse_attr_disable_gesture.dattr);
synaptics_reset(psmouse);
kfree(priv);
psmouse->private = NULL;
}
static int synaptics_reconnect(struct psmouse *psmouse)
{
struct synaptics_data *priv = psmouse->private;
struct synaptics_device_info info;
u8 param[2];
int retry = 0;
int error;
do {
psmouse_reset(psmouse);
if (retry) {
/*
* On some boxes, right after resuming, the touchpad
* needs some time to finish initializing (I assume
* it needs time to calibrate) and start responding
* to Synaptics-specific queries, so let's wait a
* bit.
*/
ssleep(1);
}
ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
error = synaptics_detect(psmouse, 0);
} while (error && ++retry < 3);
if (error)
return error;
if (retry > 1)
psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
error = synaptics_query_hardware(psmouse, &info);
if (error) {
psmouse_err(psmouse, "Unable to query device.\n");
return error;
}
error = synaptics_set_mode(psmouse);
if (error) {
psmouse_err(psmouse, "Unable to initialize device.\n");
return error;
}
if (info.identity != priv->info.identity ||
info.model_id != priv->info.model_id ||
info.capabilities != priv->info.capabilities ||
info.ext_cap != priv->info.ext_cap) {
psmouse_err(psmouse,
"hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
priv->info.identity, info.identity,
priv->info.model_id, info.model_id,
priv->info.capabilities, info.capabilities,
priv->info.ext_cap, info.ext_cap);
return -ENXIO;
}
return 0;
}
static bool impaired_toshiba_kbc;
static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
#if defined(CONFIG_DMI) && defined(CONFIG_X86)
{
/* Toshiba Satellite */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
},
},
{
/* Toshiba Dynabook */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
},
},
{
/* Toshiba Portege M300 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
},
},
{
/* Toshiba Portege M300 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
},
},
#endif
{ }
};
static bool broken_olpc_ec;
static const struct dmi_system_id olpc_dmi_table[] __initconst = {
#if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
{
/* OLPC XO-1 or XO-1.5 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
},
},
#endif
{ }
};
static const struct dmi_system_id __initconst cr48_dmi_table[] = {
#if defined(CONFIG_DMI) && defined(CONFIG_X86)
{
/* Cr-48 Chromebook (Codename Mario) */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
},
},
#endif
{ }
};
void __init synaptics_module_init(void)
{
impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
broken_olpc_ec = dmi_check_system(olpc_dmi_table);
cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
}
static int synaptics_init_ps2(struct psmouse *psmouse,
struct synaptics_device_info *info,
bool absolute_mode)
{
struct synaptics_data *priv;
int err;
synaptics_apply_quirks(psmouse, info);
psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->info = *info;
priv->absolute_mode = absolute_mode;
if (SYN_ID_DISGEST_SUPPORTED(info->identity))
priv->disable_gesture = true;
/*
* Unfortunately ForcePad capability is not exported over PS/2,
* so we have to resort to checking PNP IDs.
*/
priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
err = synaptics_set_mode(psmouse);
if (err) {
psmouse_err(psmouse, "Unable to initialize device.\n");
goto init_fail;
}
priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
SYN_NEWABS : SYN_OLDABS;
psmouse_info(psmouse,
"Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
SYN_ID_MODEL(info->identity),
SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
info->model_id,
info->capabilities, info->ext_cap, info->ext_cap_0c,
info->ext_cap_10, info->board_id, info->firmware_id);
err = set_input_params(psmouse, priv);
if (err) {
psmouse_err(psmouse,
"failed to set up capabilities: %d\n", err);
goto init_fail;
}
/*
* Encode touchpad model so that it can be used to set
* input device->id.version and be visible to userspace.
* Because version is __u16 we have to drop something.
* Hardware info bits seem to be good candidates as they
* are documented to be for Synaptics corp. internal use.
*/
psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
(info->model_id & 0x000000ff);
if (absolute_mode) {
psmouse->protocol_handler = synaptics_process_byte;
psmouse->pktsize = 6;
} else {
/* Relative mode follows standard PS/2 mouse protocol */
psmouse->protocol_handler = psmouse_process_byte;
psmouse->pktsize = 3;
}
psmouse->set_rate = synaptics_set_rate;
psmouse->disconnect = synaptics_disconnect;
psmouse->reconnect = synaptics_reconnect;
psmouse->cleanup = synaptics_reset;
/* Synaptics can usually stay in sync without extra help */
psmouse->resync_time = 0;
if (SYN_CAP_PASS_THROUGH(info->capabilities))
synaptics_pt_create(psmouse);
/*
* Toshiba's KBC seems to have trouble handling data from
* Synaptics at full rate. Switch to a lower rate (roughly
* the same rate as a standard PS/2 mouse).
*/
if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
psmouse_info(psmouse,
"Toshiba %s detected, limiting rate to 40pps.\n",
dmi_get_system_info(DMI_PRODUCT_NAME));
psmouse->rate = 40;
}
if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
err = device_create_file(&psmouse->ps2dev.serio->dev,
&psmouse_attr_disable_gesture.dattr);
if (err) {
psmouse_err(psmouse,
"Failed to create disable_gesture attribute (%d)",
err);
goto init_fail;
}
}
return 0;
init_fail:
kfree(priv);
return err;
}
static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
{
struct synaptics_device_info info;
int error;
psmouse_reset(psmouse);
error = synaptics_query_hardware(psmouse, &info);
if (error) {
psmouse_err(psmouse, "Unable to query device: %d\n", error);
return error;
}
return synaptics_init_ps2(psmouse, &info, absolute_mode);
}
int synaptics_init_absolute(struct psmouse *psmouse)
{
return __synaptics_init(psmouse, true);
}
int synaptics_init_relative(struct psmouse *psmouse)
{
return __synaptics_init(psmouse, false);
}
static int synaptics_setup_ps2(struct psmouse *psmouse,
struct synaptics_device_info *info)
{
bool absolute_mode = true;
int error;
/*
* The OLPC XO has issues with Synaptics' absolute mode; the constant
* packet spew overloads the EC such that key presses on the keyboard
* are missed. Given that, don't even attempt to use Absolute mode.
* Relative mode seems to work just fine.
*/
if (broken_olpc_ec) {
psmouse_info(psmouse,
"OLPC XO detected, forcing relative protocol.\n");
absolute_mode = false;
}
error = synaptics_init_ps2(psmouse, info, absolute_mode);
if (error)
return error;
return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
}
#else /* CONFIG_MOUSE_PS2_SYNAPTICS */
void __init synaptics_module_init(void)
{
}
static int __maybe_unused
synaptics_setup_ps2(struct psmouse *psmouse,
struct synaptics_device_info *info)
{
return -ENOSYS;
}
#endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
/*
* The newest Synaptics device can use a secondary bus (called InterTouch) which
* provides a better bandwidth and allow a better control of the touchpads.
* This is used to decide if we need to use this bus or not.
*/
enum {
SYNAPTICS_INTERTOUCH_NOT_SET = -1,
SYNAPTICS_INTERTOUCH_OFF,
SYNAPTICS_INTERTOUCH_ON,
};
static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
static int synaptics_create_intertouch(struct psmouse *psmouse,
struct synaptics_device_info *info,
bool leave_breadcrumbs)
{
bool topbuttonpad =
psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
const struct rmi_device_platform_data pdata = {
.sensor_pdata = {
.sensor_type = rmi_sensor_touchpad,
.axis_align.flip_y = true,
.kernel_tracking = false,
.topbuttonpad = topbuttonpad,
},
.gpio_data = {
.buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
.trackstick_buttons =
!!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
},
};
const struct i2c_board_info intertouch_board = {
I2C_BOARD_INFO("rmi4_smbus", 0x2c),
.flags = I2C_CLIENT_HOST_NOTIFY,
};
return psmouse_smbus_init(psmouse, &intertouch_board,
&pdata, sizeof(pdata), true,
leave_breadcrumbs);
}
/*
* synaptics_setup_intertouch - called once the PS/2 devices are enumerated
* and decides to instantiate a SMBus InterTouch device.
*/
static int synaptics_setup_intertouch(struct psmouse *psmouse,
struct synaptics_device_info *info,
bool leave_breadcrumbs)
{
int error;
if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
return -ENXIO;
if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
!psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
psmouse_info(psmouse,
"Your touchpad (%s) says it can support a different bus. "
"If i2c-hid and hid-rmi are not used, you might want to try setting psmouse.synaptics_intertouch to 1 and report this to [email protected].\n",
psmouse->ps2dev.serio->firmware_id);
return -ENXIO;
}
}
psmouse_info(psmouse, "Trying to set up SMBus access\n");
error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
if (error) {
if (error == -EAGAIN)
psmouse_info(psmouse, "SMbus companion is not ready yet\n");
else
psmouse_err(psmouse, "unable to create intertouch device\n");
return error;
}
return 0;
}
int synaptics_init_smbus(struct psmouse *psmouse)
{
struct synaptics_device_info info;
int error;
psmouse_reset(psmouse);
error = synaptics_query_hardware(psmouse, &info);
if (error) {
psmouse_err(psmouse, "Unable to query device: %d\n", error);
return error;
}
if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
return -ENXIO;
return synaptics_create_intertouch(psmouse, &info, false);
}
#else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
static int __maybe_unused
synaptics_setup_intertouch(struct psmouse *psmouse,
struct synaptics_device_info *info,
bool leave_breadcrumbs)
{
return -ENOSYS;
}
int synaptics_init_smbus(struct psmouse *psmouse)
{
return -ENOSYS;
}
#endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
#if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
int synaptics_init(struct psmouse *psmouse)
{
struct synaptics_device_info info;
int error;
int retval;
psmouse_reset(psmouse);
error = synaptics_query_hardware(psmouse, &info);
if (error) {
psmouse_err(psmouse, "Unable to query device: %d\n", error);
return error;
}
if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
!IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
/* Forcepads need F21, which is not ready */
!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
psmouse_warn(psmouse,
"The touchpad can support a better bus than the too old PS/2 protocol. "
"Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
}
error = synaptics_setup_intertouch(psmouse, &info, true);
if (!error)
return PSMOUSE_SYNAPTICS_SMBUS;
}
retval = synaptics_setup_ps2(psmouse, &info);
if (retval < 0) {
/*
* Not using any flavor of Synaptics support, so clean up
* SMbus breadcrumbs, if any.
*/
psmouse_smbus_cleanup(psmouse);
}
return retval;
}
#else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
int synaptics_init(struct psmouse *psmouse)
{
return -ENOSYS;
}
#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
|
linux-master
|
drivers/input/mouse/synaptics.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Stephen Evanchik <[email protected]>
*
* Trademarks are the property of their respective owners.
*/
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/serio.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/libps2.h>
#include <linux/proc_fs.h>
#include <linux/uaccess.h>
#include "psmouse.h"
#include "trackpoint.h"
static const char * const trackpoint_variants[] = {
[TP_VARIANT_IBM] = "IBM",
[TP_VARIANT_ALPS] = "ALPS",
[TP_VARIANT_ELAN] = "Elan",
[TP_VARIANT_NXP] = "NXP",
[TP_VARIANT_JYT_SYNAPTICS] = "JYT_Synaptics",
[TP_VARIANT_SYNAPTICS] = "Synaptics",
};
/*
* Power-on Reset: Resets all trackpoint parameters, including RAM values,
* to defaults.
* Returns zero on success, non-zero on failure.
*/
static int trackpoint_power_on_reset(struct ps2dev *ps2dev)
{
u8 param[2] = { TP_POR };
int err;
err = ps2_command(ps2dev, param, MAKE_PS2_CMD(1, 2, TP_COMMAND));
if (err)
return err;
/* Check for success response -- 0xAA00 */
if (param[0] != 0xAA || param[1] != 0x00)
return -ENODEV;
return 0;
}
/*
* Device IO: read, write and toggle bit
*/
static int trackpoint_read(struct ps2dev *ps2dev, u8 loc, u8 *results)
{
results[0] = loc;
return ps2_command(ps2dev, results, MAKE_PS2_CMD(1, 1, TP_COMMAND));
}
static int trackpoint_write(struct ps2dev *ps2dev, u8 loc, u8 val)
{
u8 param[3] = { TP_WRITE_MEM, loc, val };
return ps2_command(ps2dev, param, MAKE_PS2_CMD(3, 0, TP_COMMAND));
}
static int trackpoint_toggle_bit(struct ps2dev *ps2dev, u8 loc, u8 mask)
{
u8 param[3] = { TP_TOGGLE, loc, mask };
/* Bad things will happen if the loc param isn't in this range */
if (loc < 0x20 || loc >= 0x2F)
return -EINVAL;
return ps2_command(ps2dev, param, MAKE_PS2_CMD(3, 0, TP_COMMAND));
}
static int trackpoint_update_bit(struct ps2dev *ps2dev,
u8 loc, u8 mask, u8 value)
{
int retval;
u8 data;
retval = trackpoint_read(ps2dev, loc, &data);
if (retval)
return retval;
if (((data & mask) == mask) != !!value)
retval = trackpoint_toggle_bit(ps2dev, loc, mask);
return retval;
}
/*
* Trackpoint-specific attributes
*/
struct trackpoint_attr_data {
size_t field_offset;
u8 command;
u8 mask;
bool inverted;
u8 power_on_default;
};
static ssize_t trackpoint_show_int_attr(struct psmouse *psmouse,
void *data, char *buf)
{
struct trackpoint_data *tp = psmouse->private;
struct trackpoint_attr_data *attr = data;
u8 value = *(u8 *)((void *)tp + attr->field_offset);
if (attr->inverted)
value = !value;
return sprintf(buf, "%u\n", value);
}
static ssize_t trackpoint_set_int_attr(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
struct trackpoint_data *tp = psmouse->private;
struct trackpoint_attr_data *attr = data;
u8 *field = (void *)tp + attr->field_offset;
u8 value;
int err;
err = kstrtou8(buf, 10, &value);
if (err)
return err;
*field = value;
err = trackpoint_write(&psmouse->ps2dev, attr->command, value);
return err ?: count;
}
#define TRACKPOINT_INT_ATTR(_name, _command, _default) \
static struct trackpoint_attr_data trackpoint_attr_##_name = { \
.field_offset = offsetof(struct trackpoint_data, _name), \
.command = _command, \
.power_on_default = _default, \
}; \
PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
&trackpoint_attr_##_name, \
trackpoint_show_int_attr, trackpoint_set_int_attr)
static ssize_t trackpoint_set_bit_attr(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
struct trackpoint_data *tp = psmouse->private;
struct trackpoint_attr_data *attr = data;
bool *field = (void *)tp + attr->field_offset;
bool value;
int err;
err = kstrtobool(buf, &value);
if (err)
return err;
if (attr->inverted)
value = !value;
if (*field != value) {
*field = value;
err = trackpoint_toggle_bit(&psmouse->ps2dev,
attr->command, attr->mask);
}
return err ?: count;
}
#define TRACKPOINT_BIT_ATTR(_name, _command, _mask, _inv, _default) \
static struct trackpoint_attr_data trackpoint_attr_##_name = { \
.field_offset = offsetof(struct trackpoint_data, \
_name), \
.command = _command, \
.mask = _mask, \
.inverted = _inv, \
.power_on_default = _default, \
}; \
PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
&trackpoint_attr_##_name, \
trackpoint_show_int_attr, trackpoint_set_bit_attr)
TRACKPOINT_INT_ATTR(sensitivity, TP_SENS, TP_DEF_SENS);
TRACKPOINT_INT_ATTR(speed, TP_SPEED, TP_DEF_SPEED);
TRACKPOINT_INT_ATTR(inertia, TP_INERTIA, TP_DEF_INERTIA);
TRACKPOINT_INT_ATTR(reach, TP_REACH, TP_DEF_REACH);
TRACKPOINT_INT_ATTR(draghys, TP_DRAGHYS, TP_DEF_DRAGHYS);
TRACKPOINT_INT_ATTR(mindrag, TP_MINDRAG, TP_DEF_MINDRAG);
TRACKPOINT_INT_ATTR(thresh, TP_THRESH, TP_DEF_THRESH);
TRACKPOINT_INT_ATTR(upthresh, TP_UP_THRESH, TP_DEF_UP_THRESH);
TRACKPOINT_INT_ATTR(ztime, TP_Z_TIME, TP_DEF_Z_TIME);
TRACKPOINT_INT_ATTR(jenks, TP_JENKS_CURV, TP_DEF_JENKS_CURV);
TRACKPOINT_INT_ATTR(drift_time, TP_DRIFT_TIME, TP_DEF_DRIFT_TIME);
TRACKPOINT_BIT_ATTR(press_to_select, TP_TOGGLE_PTSON, TP_MASK_PTSON, false,
TP_DEF_PTSON);
TRACKPOINT_BIT_ATTR(skipback, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK, false,
TP_DEF_SKIPBACK);
TRACKPOINT_BIT_ATTR(ext_dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV, true,
TP_DEF_EXT_DEV);
static bool trackpoint_is_attr_available(struct psmouse *psmouse,
struct attribute *attr)
{
struct trackpoint_data *tp = psmouse->private;
return tp->variant_id == TP_VARIANT_IBM ||
attr == &psmouse_attr_sensitivity.dattr.attr ||
attr == &psmouse_attr_press_to_select.dattr.attr;
}
static umode_t trackpoint_is_attr_visible(struct kobject *kobj,
struct attribute *attr, int n)
{
struct device *dev = kobj_to_dev(kobj);
struct serio *serio = to_serio_port(dev);
struct psmouse *psmouse = psmouse_from_serio(serio);
return trackpoint_is_attr_available(psmouse, attr) ? attr->mode : 0;
}
static struct attribute *trackpoint_attrs[] = {
&psmouse_attr_sensitivity.dattr.attr,
&psmouse_attr_speed.dattr.attr,
&psmouse_attr_inertia.dattr.attr,
&psmouse_attr_reach.dattr.attr,
&psmouse_attr_draghys.dattr.attr,
&psmouse_attr_mindrag.dattr.attr,
&psmouse_attr_thresh.dattr.attr,
&psmouse_attr_upthresh.dattr.attr,
&psmouse_attr_ztime.dattr.attr,
&psmouse_attr_jenks.dattr.attr,
&psmouse_attr_drift_time.dattr.attr,
&psmouse_attr_press_to_select.dattr.attr,
&psmouse_attr_skipback.dattr.attr,
&psmouse_attr_ext_dev.dattr.attr,
NULL
};
static struct attribute_group trackpoint_attr_group = {
.is_visible = trackpoint_is_attr_visible,
.attrs = trackpoint_attrs,
};
#define TRACKPOINT_UPDATE(_power_on, _psmouse, _tp, _name) \
do { \
struct trackpoint_attr_data *_attr = &trackpoint_attr_##_name; \
\
if ((!_power_on || _tp->_name != _attr->power_on_default) && \
trackpoint_is_attr_available(_psmouse, \
&psmouse_attr_##_name.dattr.attr)) { \
if (!_attr->mask) \
trackpoint_write(&_psmouse->ps2dev, \
_attr->command, _tp->_name); \
else \
trackpoint_update_bit(&_psmouse->ps2dev, \
_attr->command, _attr->mask, \
_tp->_name); \
} \
} while (0)
#define TRACKPOINT_SET_POWER_ON_DEFAULT(_tp, _name) \
do { \
_tp->_name = trackpoint_attr_##_name.power_on_default; \
} while (0)
static int trackpoint_start_protocol(struct psmouse *psmouse,
u8 *variant_id, u8 *firmware_id)
{
u8 param[2] = { 0 };
int error;
error = ps2_command(&psmouse->ps2dev,
param, MAKE_PS2_CMD(0, 2, TP_READ_ID));
if (error)
return error;
switch (param[0]) {
case TP_VARIANT_IBM:
case TP_VARIANT_ALPS:
case TP_VARIANT_ELAN:
case TP_VARIANT_NXP:
case TP_VARIANT_JYT_SYNAPTICS:
case TP_VARIANT_SYNAPTICS:
if (variant_id)
*variant_id = param[0];
if (firmware_id)
*firmware_id = param[1];
return 0;
}
return -ENODEV;
}
/*
* Write parameters to trackpad.
* in_power_on_state: Set to true if TP is in default / power-on state (ex. if
* power-on reset was run). If so, values will only be
* written to TP if they differ from power-on default.
*/
static int trackpoint_sync(struct psmouse *psmouse, bool in_power_on_state)
{
struct trackpoint_data *tp = psmouse->private;
if (!in_power_on_state && tp->variant_id == TP_VARIANT_IBM) {
/*
* Disable features that may make device unusable
* with this driver.
*/
trackpoint_update_bit(&psmouse->ps2dev, TP_TOGGLE_TWOHAND,
TP_MASK_TWOHAND, TP_DEF_TWOHAND);
trackpoint_update_bit(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG,
TP_MASK_SOURCE_TAG, TP_DEF_SOURCE_TAG);
trackpoint_update_bit(&psmouse->ps2dev, TP_TOGGLE_MB,
TP_MASK_MB, TP_DEF_MB);
}
/*
* These properties can be changed in this driver. Only
* configure them if the values are non-default or if the TP is in
* an unknown state.
*/
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, sensitivity);
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, inertia);
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, speed);
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, reach);
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, draghys);
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, mindrag);
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, thresh);
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, upthresh);
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, ztime);
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, jenks);
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, drift_time);
/* toggles */
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, press_to_select);
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, skipback);
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, ext_dev);
return 0;
}
static void trackpoint_defaults(struct trackpoint_data *tp)
{
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, sensitivity);
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, speed);
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, reach);
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, draghys);
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, mindrag);
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, thresh);
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, upthresh);
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, ztime);
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, jenks);
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, drift_time);
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, inertia);
/* toggles */
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, press_to_select);
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, skipback);
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, ext_dev);
}
static void trackpoint_disconnect(struct psmouse *psmouse)
{
device_remove_group(&psmouse->ps2dev.serio->dev,
&trackpoint_attr_group);
kfree(psmouse->private);
psmouse->private = NULL;
}
static int trackpoint_reconnect(struct psmouse *psmouse)
{
struct trackpoint_data *tp = psmouse->private;
int error;
bool was_reset;
error = trackpoint_start_protocol(psmouse, NULL, NULL);
if (error)
return error;
was_reset = tp->variant_id == TP_VARIANT_IBM &&
trackpoint_power_on_reset(&psmouse->ps2dev) == 0;
error = trackpoint_sync(psmouse, was_reset);
if (error)
return error;
return 0;
}
int trackpoint_detect(struct psmouse *psmouse, bool set_properties)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
struct trackpoint_data *tp;
u8 variant_id;
u8 firmware_id;
u8 button_info;
int error;
error = trackpoint_start_protocol(psmouse, &variant_id, &firmware_id);
if (error)
return error;
if (!set_properties)
return 0;
tp = kzalloc(sizeof(*tp), GFP_KERNEL);
if (!tp)
return -ENOMEM;
trackpoint_defaults(tp);
tp->variant_id = variant_id;
tp->firmware_id = firmware_id;
psmouse->private = tp;
psmouse->vendor = trackpoint_variants[variant_id];
psmouse->name = "TrackPoint";
psmouse->reconnect = trackpoint_reconnect;
psmouse->disconnect = trackpoint_disconnect;
if (variant_id != TP_VARIANT_IBM) {
/* Newer variants do not support extended button query. */
button_info = 0x33;
} else {
error = trackpoint_read(ps2dev, TP_EXT_BTN, &button_info);
if (error) {
psmouse_warn(psmouse,
"failed to get extended button data, assuming 3 buttons\n");
button_info = 0x33;
} else if (!button_info) {
psmouse_warn(psmouse,
"got 0 in extended button data, assuming 3 buttons\n");
button_info = 0x33;
}
}
if ((button_info & 0x0f) >= 3)
input_set_capability(psmouse->dev, EV_KEY, BTN_MIDDLE);
__set_bit(INPUT_PROP_POINTER, psmouse->dev->propbit);
__set_bit(INPUT_PROP_POINTING_STICK, psmouse->dev->propbit);
if (variant_id != TP_VARIANT_IBM ||
trackpoint_power_on_reset(ps2dev) != 0) {
/*
* Write defaults to TP if we did not reset the trackpoint.
*/
trackpoint_sync(psmouse, false);
}
error = device_add_group(&ps2dev->serio->dev, &trackpoint_attr_group);
if (error) {
psmouse_err(psmouse,
"failed to create sysfs attributes, error: %d\n",
error);
kfree(psmouse->private);
psmouse->private = NULL;
return -1;
}
psmouse_info(psmouse,
"%s TrackPoint firmware: 0x%02x, buttons: %d/%d\n",
psmouse->vendor, firmware_id,
(button_info & 0xf0) >> 4, button_info & 0x0f);
return 0;
}
|
linux-master
|
drivers/input/mouse/trackpoint.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for Virtual PS/2 Mouse on VMware and QEMU hypervisors.
*
* Copyright (C) 2014, VMware, Inc. All Rights Reserved.
*
* Twin device code is hugely inspired by the ALPS driver.
* Authors:
* Dmitry Torokhov <[email protected]>
* Thomas Hellstrom <[email protected]>
*/
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/libps2.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <asm/hypervisor.h>
#include <asm/vmware.h>
#include "psmouse.h"
#include "vmmouse.h"
#define VMMOUSE_PROTO_MAGIC 0x564D5868U
/*
* Main commands supported by the vmmouse hypervisor port.
*/
#define VMMOUSE_PROTO_CMD_GETVERSION 10
#define VMMOUSE_PROTO_CMD_ABSPOINTER_DATA 39
#define VMMOUSE_PROTO_CMD_ABSPOINTER_STATUS 40
#define VMMOUSE_PROTO_CMD_ABSPOINTER_COMMAND 41
#define VMMOUSE_PROTO_CMD_ABSPOINTER_RESTRICT 86
/*
* Subcommands for VMMOUSE_PROTO_CMD_ABSPOINTER_COMMAND
*/
#define VMMOUSE_CMD_ENABLE 0x45414552U
#define VMMOUSE_CMD_DISABLE 0x000000f5U
#define VMMOUSE_CMD_REQUEST_RELATIVE 0x4c455252U
#define VMMOUSE_CMD_REQUEST_ABSOLUTE 0x53424152U
#define VMMOUSE_ERROR 0xffff0000U
#define VMMOUSE_VERSION_ID 0x3442554aU
#define VMMOUSE_RELATIVE_PACKET 0x00010000U
#define VMMOUSE_LEFT_BUTTON 0x20
#define VMMOUSE_RIGHT_BUTTON 0x10
#define VMMOUSE_MIDDLE_BUTTON 0x08
/*
* VMMouse Restrict command
*/
#define VMMOUSE_RESTRICT_ANY 0x00
#define VMMOUSE_RESTRICT_CPL0 0x01
#define VMMOUSE_RESTRICT_IOPL 0x02
#define VMMOUSE_MAX_X 0xFFFF
#define VMMOUSE_MAX_Y 0xFFFF
#define VMMOUSE_VENDOR "VMware"
#define VMMOUSE_NAME "VMMouse"
/**
* struct vmmouse_data - private data structure for the vmmouse driver
*
* @abs_dev: "Absolute" device used to report absolute mouse movement.
* @phys: Physical path for the absolute device.
* @dev_name: Name attribute name for the absolute device.
*/
struct vmmouse_data {
struct input_dev *abs_dev;
char phys[32];
char dev_name[128];
};
/*
* Hypervisor-specific bi-directional communication channel
* implementing the vmmouse protocol. Should never execute on
* bare metal hardware.
*/
#define VMMOUSE_CMD(cmd, in1, out1, out2, out3, out4) \
({ \
unsigned long __dummy1, __dummy2; \
__asm__ __volatile__ (VMWARE_HYPERCALL : \
"=a"(out1), \
"=b"(out2), \
"=c"(out3), \
"=d"(out4), \
"=S"(__dummy1), \
"=D"(__dummy2) : \
"a"(VMMOUSE_PROTO_MAGIC), \
"b"(in1), \
"c"(VMMOUSE_PROTO_CMD_##cmd), \
"d"(0) : \
"memory"); \
})
/**
* vmmouse_report_button - report button state on the correct input device
*
* @psmouse: Pointer to the psmouse struct
* @abs_dev: The absolute input device
* @rel_dev: The relative input device
* @pref_dev: The preferred device for reporting
* @code: Button code
* @value: Button value
*
* Report @value and @code on @pref_dev, unless the button is already
* pressed on the other device, in which case the state is reported on that
* device.
*/
static void vmmouse_report_button(struct psmouse *psmouse,
struct input_dev *abs_dev,
struct input_dev *rel_dev,
struct input_dev *pref_dev,
unsigned int code, int value)
{
if (test_bit(code, abs_dev->key))
pref_dev = abs_dev;
else if (test_bit(code, rel_dev->key))
pref_dev = rel_dev;
input_report_key(pref_dev, code, value);
}
/**
* vmmouse_report_events - process events on the vmmouse communications channel
*
* @psmouse: Pointer to the psmouse struct
*
* This function pulls events from the vmmouse communications channel and
* reports them on the correct (absolute or relative) input device. When the
* communications channel is drained, or if we've processed more than 255
* psmouse commands, the function returns PSMOUSE_FULL_PACKET. If there is a
* host- or synchronization error, the function returns PSMOUSE_BAD_DATA in
* the hope that the caller will reset the communications channel.
*/
static psmouse_ret_t vmmouse_report_events(struct psmouse *psmouse)
{
struct input_dev *rel_dev = psmouse->dev;
struct vmmouse_data *priv = psmouse->private;
struct input_dev *abs_dev = priv->abs_dev;
struct input_dev *pref_dev;
u32 status, x, y, z;
u32 dummy1, dummy2, dummy3;
unsigned int queue_length;
unsigned int count = 255;
while (count--) {
/* See if we have motion data. */
VMMOUSE_CMD(ABSPOINTER_STATUS, 0,
status, dummy1, dummy2, dummy3);
if ((status & VMMOUSE_ERROR) == VMMOUSE_ERROR) {
psmouse_err(psmouse, "failed to fetch status data\n");
/*
* After a few attempts this will result in
* reconnect.
*/
return PSMOUSE_BAD_DATA;
}
queue_length = status & 0xffff;
if (queue_length == 0)
break;
if (queue_length % 4) {
psmouse_err(psmouse, "invalid queue length\n");
return PSMOUSE_BAD_DATA;
}
/* Now get it */
VMMOUSE_CMD(ABSPOINTER_DATA, 4, status, x, y, z);
/*
* And report what we've got. Prefer to report button
* events on the same device where we report motion events.
* This doesn't work well with the mouse wheel, though. See
* below. Ideally we would want to report that on the
* preferred device as well.
*/
if (status & VMMOUSE_RELATIVE_PACKET) {
pref_dev = rel_dev;
input_report_rel(rel_dev, REL_X, (s32)x);
input_report_rel(rel_dev, REL_Y, -(s32)y);
} else {
pref_dev = abs_dev;
input_report_abs(abs_dev, ABS_X, x);
input_report_abs(abs_dev, ABS_Y, y);
}
/* Xorg seems to ignore wheel events on absolute devices */
input_report_rel(rel_dev, REL_WHEEL, -(s8)((u8) z));
vmmouse_report_button(psmouse, abs_dev, rel_dev,
pref_dev, BTN_LEFT,
status & VMMOUSE_LEFT_BUTTON);
vmmouse_report_button(psmouse, abs_dev, rel_dev,
pref_dev, BTN_RIGHT,
status & VMMOUSE_RIGHT_BUTTON);
vmmouse_report_button(psmouse, abs_dev, rel_dev,
pref_dev, BTN_MIDDLE,
status & VMMOUSE_MIDDLE_BUTTON);
input_sync(abs_dev);
input_sync(rel_dev);
}
return PSMOUSE_FULL_PACKET;
}
/**
* vmmouse_process_byte - process data on the ps/2 channel
*
* @psmouse: Pointer to the psmouse struct
*
* When the ps/2 channel indicates that there is vmmouse data available,
* call vmmouse channel processing. Otherwise, continue to accept bytes. If
* there is a synchronization or communication data error, return
* PSMOUSE_BAD_DATA in the hope that the caller will reset the mouse.
*/
static psmouse_ret_t vmmouse_process_byte(struct psmouse *psmouse)
{
unsigned char *packet = psmouse->packet;
switch (psmouse->pktcnt) {
case 1:
return (packet[0] & 0x8) == 0x8 ?
PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
case 2:
return PSMOUSE_GOOD_DATA;
default:
return vmmouse_report_events(psmouse);
}
}
/**
* vmmouse_disable - Disable vmmouse
*
* @psmouse: Pointer to the psmouse struct
*
* Tries to disable vmmouse mode.
*/
static void vmmouse_disable(struct psmouse *psmouse)
{
u32 status;
u32 dummy1, dummy2, dummy3, dummy4;
VMMOUSE_CMD(ABSPOINTER_COMMAND, VMMOUSE_CMD_DISABLE,
dummy1, dummy2, dummy3, dummy4);
VMMOUSE_CMD(ABSPOINTER_STATUS, 0,
status, dummy1, dummy2, dummy3);
if ((status & VMMOUSE_ERROR) != VMMOUSE_ERROR)
psmouse_warn(psmouse, "failed to disable vmmouse device\n");
}
/**
* vmmouse_enable - Enable vmmouse and request absolute mode.
*
* @psmouse: Pointer to the psmouse struct
*
* Tries to enable vmmouse mode. Performs basic checks and requests
* absolute vmmouse mode.
* Returns 0 on success, -ENODEV on failure.
*/
static int vmmouse_enable(struct psmouse *psmouse)
{
u32 status, version;
u32 dummy1, dummy2, dummy3, dummy4;
/*
* Try enabling the device. If successful, we should be able to
* read valid version ID back from it.
*/
VMMOUSE_CMD(ABSPOINTER_COMMAND, VMMOUSE_CMD_ENABLE,
dummy1, dummy2, dummy3, dummy4);
/*
* See if version ID can be retrieved.
*/
VMMOUSE_CMD(ABSPOINTER_STATUS, 0, status, dummy1, dummy2, dummy3);
if ((status & 0x0000ffff) == 0) {
psmouse_dbg(psmouse, "empty flags - assuming no device\n");
return -ENXIO;
}
VMMOUSE_CMD(ABSPOINTER_DATA, 1 /* single item */,
version, dummy1, dummy2, dummy3);
if (version != VMMOUSE_VERSION_ID) {
psmouse_dbg(psmouse, "Unexpected version value: %u vs %u\n",
(unsigned) version, VMMOUSE_VERSION_ID);
vmmouse_disable(psmouse);
return -ENXIO;
}
/*
* Restrict ioport access, if possible.
*/
VMMOUSE_CMD(ABSPOINTER_RESTRICT, VMMOUSE_RESTRICT_CPL0,
dummy1, dummy2, dummy3, dummy4);
VMMOUSE_CMD(ABSPOINTER_COMMAND, VMMOUSE_CMD_REQUEST_ABSOLUTE,
dummy1, dummy2, dummy3, dummy4);
return 0;
}
/*
* Array of supported hypervisors.
*/
static enum x86_hypervisor_type vmmouse_supported_hypervisors[] = {
X86_HYPER_VMWARE,
X86_HYPER_KVM,
};
/**
* vmmouse_check_hypervisor - Check if we're running on a supported hypervisor
*/
static bool vmmouse_check_hypervisor(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(vmmouse_supported_hypervisors); i++)
if (vmmouse_supported_hypervisors[i] == x86_hyper_type)
return true;
return false;
}
/**
* vmmouse_detect - Probe whether vmmouse is available
*
* @psmouse: Pointer to the psmouse struct
* @set_properties: Whether to set psmouse name and vendor
*
* Returns 0 if vmmouse channel is available. Negative error code if not.
*/
int vmmouse_detect(struct psmouse *psmouse, bool set_properties)
{
u32 response, version, dummy1, dummy2;
if (!vmmouse_check_hypervisor()) {
psmouse_dbg(psmouse,
"VMMouse not running on supported hypervisor.\n");
return -ENXIO;
}
/* Check if the device is present */
response = ~VMMOUSE_PROTO_MAGIC;
VMMOUSE_CMD(GETVERSION, 0, version, response, dummy1, dummy2);
if (response != VMMOUSE_PROTO_MAGIC || version == 0xffffffffU)
return -ENXIO;
if (set_properties) {
psmouse->vendor = VMMOUSE_VENDOR;
psmouse->name = VMMOUSE_NAME;
psmouse->model = version;
}
return 0;
}
/**
* vmmouse_reset - Disable vmmouse and reset
*
* @psmouse: Pointer to the psmouse struct
*
* Tries to disable vmmouse mode before enter suspend.
*/
static void vmmouse_reset(struct psmouse *psmouse)
{
vmmouse_disable(psmouse);
psmouse_reset(psmouse);
}
/**
* vmmouse_disconnect - Take down vmmouse driver
*
* @psmouse: Pointer to the psmouse struct
*
* Takes down vmmouse driver and frees resources set up in vmmouse_init().
*/
static void vmmouse_disconnect(struct psmouse *psmouse)
{
struct vmmouse_data *priv = psmouse->private;
vmmouse_disable(psmouse);
psmouse_reset(psmouse);
input_unregister_device(priv->abs_dev);
kfree(priv);
}
/**
* vmmouse_reconnect - Reset the ps/2 - and vmmouse connections
*
* @psmouse: Pointer to the psmouse struct
*
* Attempts to reset the mouse connections. Returns 0 on success and
* -1 on failure.
*/
static int vmmouse_reconnect(struct psmouse *psmouse)
{
int error;
psmouse_reset(psmouse);
vmmouse_disable(psmouse);
error = vmmouse_enable(psmouse);
if (error) {
psmouse_err(psmouse,
"Unable to re-enable mouse when reconnecting, err: %d\n",
error);
return error;
}
return 0;
}
/**
* vmmouse_init - Initialize the vmmouse driver
*
* @psmouse: Pointer to the psmouse struct
*
* Requests the device and tries to enable vmmouse mode.
* If successful, sets up the input device for relative movement events.
* It also allocates another input device and sets it up for absolute motion
* events. Returns 0 on success and -1 on failure.
*/
int vmmouse_init(struct psmouse *psmouse)
{
struct vmmouse_data *priv;
struct input_dev *rel_dev = psmouse->dev, *abs_dev;
int error;
psmouse_reset(psmouse);
error = vmmouse_enable(psmouse);
if (error)
return error;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
abs_dev = input_allocate_device();
if (!priv || !abs_dev) {
error = -ENOMEM;
goto init_fail;
}
priv->abs_dev = abs_dev;
psmouse->private = priv;
/* Set up and register absolute device */
snprintf(priv->phys, sizeof(priv->phys), "%s/input1",
psmouse->ps2dev.serio->phys);
/* Mimic name setup for relative device in psmouse-base.c */
snprintf(priv->dev_name, sizeof(priv->dev_name), "%s %s %s",
VMMOUSE_PSNAME, VMMOUSE_VENDOR, VMMOUSE_NAME);
abs_dev->phys = priv->phys;
abs_dev->name = priv->dev_name;
abs_dev->id.bustype = BUS_I8042;
abs_dev->id.vendor = 0x0002;
abs_dev->id.product = PSMOUSE_VMMOUSE;
abs_dev->id.version = psmouse->model;
abs_dev->dev.parent = &psmouse->ps2dev.serio->dev;
/* Set absolute device capabilities */
input_set_capability(abs_dev, EV_KEY, BTN_LEFT);
input_set_capability(abs_dev, EV_KEY, BTN_RIGHT);
input_set_capability(abs_dev, EV_KEY, BTN_MIDDLE);
input_set_capability(abs_dev, EV_ABS, ABS_X);
input_set_capability(abs_dev, EV_ABS, ABS_Y);
input_set_abs_params(abs_dev, ABS_X, 0, VMMOUSE_MAX_X, 0, 0);
input_set_abs_params(abs_dev, ABS_Y, 0, VMMOUSE_MAX_Y, 0, 0);
error = input_register_device(priv->abs_dev);
if (error)
goto init_fail;
/* Add wheel capability to the relative device */
input_set_capability(rel_dev, EV_REL, REL_WHEEL);
psmouse->protocol_handler = vmmouse_process_byte;
psmouse->disconnect = vmmouse_disconnect;
psmouse->reconnect = vmmouse_reconnect;
psmouse->cleanup = vmmouse_reset;
return 0;
init_fail:
vmmouse_disable(psmouse);
psmouse_reset(psmouse);
input_free_device(abs_dev);
kfree(priv);
psmouse->private = NULL;
return error;
}
|
linux-master
|
drivers/input/mouse/vmmouse.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for simulating a mouse on GPIO lines.
*
* Copyright (C) 2007 Atmel Corporation
* Copyright (C) 2017 Linus Walleij <[email protected]>
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/gpio/consumer.h>
#include <linux/property.h>
#include <linux/of.h>
/**
* struct gpio_mouse
* @scan_ms: the scan interval in milliseconds.
* @up: GPIO line for up value.
* @down: GPIO line for down value.
* @left: GPIO line for left value.
* @right: GPIO line for right value.
* @bleft: GPIO line for left button.
* @bmiddle: GPIO line for middle button.
* @bright: GPIO line for right button.
*
* This struct must be added to the platform_device in the board code.
* It is used by the gpio_mouse driver to setup GPIO lines and to
* calculate mouse movement.
*/
struct gpio_mouse {
u32 scan_ms;
struct gpio_desc *up;
struct gpio_desc *down;
struct gpio_desc *left;
struct gpio_desc *right;
struct gpio_desc *bleft;
struct gpio_desc *bmiddle;
struct gpio_desc *bright;
};
/*
* Timer function which is run every scan_ms ms when the device is opened.
* The dev input variable is set to the input_dev pointer.
*/
static void gpio_mouse_scan(struct input_dev *input)
{
struct gpio_mouse *gpio = input_get_drvdata(input);
int x, y;
if (gpio->bleft)
input_report_key(input, BTN_LEFT,
gpiod_get_value(gpio->bleft));
if (gpio->bmiddle)
input_report_key(input, BTN_MIDDLE,
gpiod_get_value(gpio->bmiddle));
if (gpio->bright)
input_report_key(input, BTN_RIGHT,
gpiod_get_value(gpio->bright));
x = gpiod_get_value(gpio->right) - gpiod_get_value(gpio->left);
y = gpiod_get_value(gpio->down) - gpiod_get_value(gpio->up);
input_report_rel(input, REL_X, x);
input_report_rel(input, REL_Y, y);
input_sync(input);
}
static int gpio_mouse_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct gpio_mouse *gmouse;
struct input_dev *input;
int error;
gmouse = devm_kzalloc(dev, sizeof(*gmouse), GFP_KERNEL);
if (!gmouse)
return -ENOMEM;
/* Assign some default scanning time */
error = device_property_read_u32(dev, "scan-interval-ms",
&gmouse->scan_ms);
if (error || gmouse->scan_ms == 0) {
dev_warn(dev, "invalid scan time, set to 50 ms\n");
gmouse->scan_ms = 50;
}
gmouse->up = devm_gpiod_get(dev, "up", GPIOD_IN);
if (IS_ERR(gmouse->up))
return PTR_ERR(gmouse->up);
gmouse->down = devm_gpiod_get(dev, "down", GPIOD_IN);
if (IS_ERR(gmouse->down))
return PTR_ERR(gmouse->down);
gmouse->left = devm_gpiod_get(dev, "left", GPIOD_IN);
if (IS_ERR(gmouse->left))
return PTR_ERR(gmouse->left);
gmouse->right = devm_gpiod_get(dev, "right", GPIOD_IN);
if (IS_ERR(gmouse->right))
return PTR_ERR(gmouse->right);
gmouse->bleft = devm_gpiod_get_optional(dev, "button-left", GPIOD_IN);
if (IS_ERR(gmouse->bleft))
return PTR_ERR(gmouse->bleft);
gmouse->bmiddle = devm_gpiod_get_optional(dev, "button-middle",
GPIOD_IN);
if (IS_ERR(gmouse->bmiddle))
return PTR_ERR(gmouse->bmiddle);
gmouse->bright = devm_gpiod_get_optional(dev, "button-right",
GPIOD_IN);
if (IS_ERR(gmouse->bright))
return PTR_ERR(gmouse->bright);
input = devm_input_allocate_device(dev);
if (!input)
return -ENOMEM;
input->name = pdev->name;
input->id.bustype = BUS_HOST;
input_set_drvdata(input, gmouse);
input_set_capability(input, EV_REL, REL_X);
input_set_capability(input, EV_REL, REL_Y);
if (gmouse->bleft)
input_set_capability(input, EV_KEY, BTN_LEFT);
if (gmouse->bmiddle)
input_set_capability(input, EV_KEY, BTN_MIDDLE);
if (gmouse->bright)
input_set_capability(input, EV_KEY, BTN_RIGHT);
error = input_setup_polling(input, gpio_mouse_scan);
if (error)
return error;
input_set_poll_interval(input, gmouse->scan_ms);
error = input_register_device(input);
if (error) {
dev_err(dev, "could not register input device\n");
return error;
}
dev_dbg(dev, "%d ms scan time, buttons: %s%s%s\n",
gmouse->scan_ms,
gmouse->bleft ? "" : "left ",
gmouse->bmiddle ? "" : "middle ",
gmouse->bright ? "" : "right");
return 0;
}
static const struct of_device_id gpio_mouse_of_match[] = {
{ .compatible = "gpio-mouse", },
{ },
};
MODULE_DEVICE_TABLE(of, gpio_mouse_of_match);
static struct platform_driver gpio_mouse_device_driver = {
.probe = gpio_mouse_probe,
.driver = {
.name = "gpio_mouse",
.of_match_table = gpio_mouse_of_match,
}
};
module_platform_driver(gpio_mouse_device_driver);
MODULE_AUTHOR("Hans-Christian Egtvedt <[email protected]>");
MODULE_DESCRIPTION("GPIO mouse driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:gpio_mouse"); /* work with hotplug and coldplug */
|
linux-master
|
drivers/input/mouse/gpio_mouse.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2000-2001 Vojtech Pavlik
*
* Based on the work of:
* Alan Cox Robin O'Leary
*/
/*
* IBM PC110 touchpad driver for Linux
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/input.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/irq.h>
MODULE_AUTHOR("Vojtech Pavlik <[email protected]>");
MODULE_DESCRIPTION("IBM PC110 touchpad driver");
MODULE_LICENSE("GPL");
#define PC110PAD_OFF 0x30
#define PC110PAD_ON 0x38
static int pc110pad_irq = 10;
static int pc110pad_io = 0x15e0;
static struct input_dev *pc110pad_dev;
static int pc110pad_data[3];
static int pc110pad_count;
static irqreturn_t pc110pad_interrupt(int irq, void *ptr)
{
int value = inb_p(pc110pad_io);
int handshake = inb_p(pc110pad_io + 2);
outb(handshake | 1, pc110pad_io + 2);
udelay(2);
outb(handshake & ~1, pc110pad_io + 2);
udelay(2);
inb_p(0x64);
pc110pad_data[pc110pad_count++] = value;
if (pc110pad_count < 3)
return IRQ_HANDLED;
input_report_key(pc110pad_dev, BTN_TOUCH,
pc110pad_data[0] & 0x01);
input_report_abs(pc110pad_dev, ABS_X,
pc110pad_data[1] | ((pc110pad_data[0] << 3) & 0x80) | ((pc110pad_data[0] << 1) & 0x100));
input_report_abs(pc110pad_dev, ABS_Y,
pc110pad_data[2] | ((pc110pad_data[0] << 4) & 0x80));
input_sync(pc110pad_dev);
pc110pad_count = 0;
return IRQ_HANDLED;
}
static void pc110pad_close(struct input_dev *dev)
{
outb(PC110PAD_OFF, pc110pad_io + 2);
}
static int pc110pad_open(struct input_dev *dev)
{
pc110pad_interrupt(0, NULL);
pc110pad_interrupt(0, NULL);
pc110pad_interrupt(0, NULL);
outb(PC110PAD_ON, pc110pad_io + 2);
pc110pad_count = 0;
return 0;
}
/*
* We try to avoid enabling the hardware if it's not
* there, but we don't know how to test. But we do know
* that the PC110 is not a PCI system. So if we find any
* PCI devices in the machine, we don't have a PC110.
*/
static int __init pc110pad_init(void)
{
int err;
if (!no_pci_devices())
return -ENODEV;
if (!request_region(pc110pad_io, 4, "pc110pad")) {
printk(KERN_ERR "pc110pad: I/O area %#x-%#x in use.\n",
pc110pad_io, pc110pad_io + 4);
return -EBUSY;
}
outb(PC110PAD_OFF, pc110pad_io + 2);
if (request_irq(pc110pad_irq, pc110pad_interrupt, 0, "pc110pad", NULL)) {
printk(KERN_ERR "pc110pad: Unable to get irq %d.\n", pc110pad_irq);
err = -EBUSY;
goto err_release_region;
}
pc110pad_dev = input_allocate_device();
if (!pc110pad_dev) {
printk(KERN_ERR "pc110pad: Not enough memory.\n");
err = -ENOMEM;
goto err_free_irq;
}
pc110pad_dev->name = "IBM PC110 TouchPad";
pc110pad_dev->phys = "isa15e0/input0";
pc110pad_dev->id.bustype = BUS_ISA;
pc110pad_dev->id.vendor = 0x0003;
pc110pad_dev->id.product = 0x0001;
pc110pad_dev->id.version = 0x0100;
pc110pad_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
pc110pad_dev->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
pc110pad_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_abs_set_max(pc110pad_dev, ABS_X, 0x1ff);
input_abs_set_max(pc110pad_dev, ABS_Y, 0x0ff);
pc110pad_dev->open = pc110pad_open;
pc110pad_dev->close = pc110pad_close;
err = input_register_device(pc110pad_dev);
if (err)
goto err_free_dev;
return 0;
err_free_dev:
input_free_device(pc110pad_dev);
err_free_irq:
free_irq(pc110pad_irq, NULL);
err_release_region:
release_region(pc110pad_io, 4);
return err;
}
static void __exit pc110pad_exit(void)
{
outb(PC110PAD_OFF, pc110pad_io + 2);
free_irq(pc110pad_irq, NULL);
input_unregister_device(pc110pad_dev);
release_region(pc110pad_io, 4);
}
module_init(pc110pad_init);
module_exit(pc110pad_exit);
|
linux-master
|
drivers/input/mouse/pc110pad.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*-
* Finger Sensing Pad PS/2 mouse driver.
*
* Copyright (C) 2005-2007 Asia Vital Components Co., Ltd.
* Copyright (C) 2005-2012 Tai-hwa Liang, Sentelic Corporation.
*/
#include <linux/module.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/ctype.h>
#include <linux/libps2.h>
#include <linux/serio.h>
#include <linux/jiffies.h>
#include <linux/slab.h>
#include "psmouse.h"
#include "sentelic.h"
/*
* Timeout for FSP PS/2 command only (in milliseconds).
*/
#define FSP_CMD_TIMEOUT 200
#define FSP_CMD_TIMEOUT2 30
#define GET_ABS_X(packet) ((packet[1] << 2) | ((packet[3] >> 2) & 0x03))
#define GET_ABS_Y(packet) ((packet[2] << 2) | (packet[3] & 0x03))
/** Driver version. */
static const char fsp_drv_ver[] = "1.1.0-K";
/*
* Make sure that the value being sent to FSP will not conflict with
* possible sample rate values.
*/
static unsigned char fsp_test_swap_cmd(unsigned char reg_val)
{
switch (reg_val) {
case 10: case 20: case 40: case 60: case 80: case 100: case 200:
/*
* The requested value being sent to FSP matched to possible
* sample rates, swap the given value such that the hardware
* wouldn't get confused.
*/
return (reg_val >> 4) | (reg_val << 4);
default:
return reg_val; /* swap isn't necessary */
}
}
/*
* Make sure that the value being sent to FSP will not conflict with certain
* commands.
*/
static unsigned char fsp_test_invert_cmd(unsigned char reg_val)
{
switch (reg_val) {
case 0xe9: case 0xee: case 0xf2: case 0xff:
/*
* The requested value being sent to FSP matched to certain
* commands, inverse the given value such that the hardware
* wouldn't get confused.
*/
return ~reg_val;
default:
return reg_val; /* inversion isn't necessary */
}
}
static int fsp_reg_read(struct psmouse *psmouse, int reg_addr, int *reg_val)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char param[3];
unsigned char addr;
int rc = -1;
/*
* We need to shut off the device and switch it into command
* mode so we don't confuse our protocol handler. We don't need
* to do that for writes because sysfs set helper does this for
* us.
*/
psmouse_deactivate(psmouse);
ps2_begin_command(ps2dev);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
/* should return 0xfe(request for resending) */
ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
/* should return 0xfc(failed) */
ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
if ((addr = fsp_test_invert_cmd(reg_addr)) != reg_addr) {
ps2_sendbyte(ps2dev, 0x68, FSP_CMD_TIMEOUT2);
} else if ((addr = fsp_test_swap_cmd(reg_addr)) != reg_addr) {
/* swapping is required */
ps2_sendbyte(ps2dev, 0xcc, FSP_CMD_TIMEOUT2);
/* expect 0xfe */
} else {
/* swapping isn't necessary */
ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
/* expect 0xfe */
}
/* should return 0xfc(failed) */
ps2_sendbyte(ps2dev, addr, FSP_CMD_TIMEOUT);
if (__ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) < 0)
goto out;
*reg_val = param[2];
rc = 0;
out:
ps2_end_command(ps2dev);
psmouse_activate(psmouse);
psmouse_dbg(psmouse,
"READ REG: 0x%02x is 0x%02x (rc = %d)\n",
reg_addr, *reg_val, rc);
return rc;
}
static int fsp_reg_write(struct psmouse *psmouse, int reg_addr, int reg_val)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char v;
int rc = -1;
ps2_begin_command(ps2dev);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
if ((v = fsp_test_invert_cmd(reg_addr)) != reg_addr) {
/* inversion is required */
ps2_sendbyte(ps2dev, 0x74, FSP_CMD_TIMEOUT2);
} else {
if ((v = fsp_test_swap_cmd(reg_addr)) != reg_addr) {
/* swapping is required */
ps2_sendbyte(ps2dev, 0x77, FSP_CMD_TIMEOUT2);
} else {
/* swapping isn't necessary */
ps2_sendbyte(ps2dev, 0x55, FSP_CMD_TIMEOUT2);
}
}
/* write the register address in correct order */
ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
if ((v = fsp_test_invert_cmd(reg_val)) != reg_val) {
/* inversion is required */
ps2_sendbyte(ps2dev, 0x47, FSP_CMD_TIMEOUT2);
} else if ((v = fsp_test_swap_cmd(reg_val)) != reg_val) {
/* swapping is required */
ps2_sendbyte(ps2dev, 0x44, FSP_CMD_TIMEOUT2);
} else {
/* swapping isn't necessary */
ps2_sendbyte(ps2dev, 0x33, FSP_CMD_TIMEOUT2);
}
/* write the register value in correct order */
ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
rc = 0;
out:
ps2_end_command(ps2dev);
psmouse_dbg(psmouse,
"WRITE REG: 0x%02x to 0x%02x (rc = %d)\n",
reg_addr, reg_val, rc);
return rc;
}
/* Enable register clock gating for writing certain registers */
static int fsp_reg_write_enable(struct psmouse *psmouse, bool enable)
{
int v, nv;
if (fsp_reg_read(psmouse, FSP_REG_SYSCTL1, &v) == -1)
return -1;
if (enable)
nv = v | FSP_BIT_EN_REG_CLK;
else
nv = v & ~FSP_BIT_EN_REG_CLK;
/* only write if necessary */
if (nv != v)
if (fsp_reg_write(psmouse, FSP_REG_SYSCTL1, nv) == -1)
return -1;
return 0;
}
static int fsp_page_reg_read(struct psmouse *psmouse, int *reg_val)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char param[3];
int rc = -1;
psmouse_deactivate(psmouse);
ps2_begin_command(ps2dev);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
ps2_sendbyte(ps2dev, 0x83, FSP_CMD_TIMEOUT2);
ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
/* get the returned result */
if (__ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
goto out;
*reg_val = param[2];
rc = 0;
out:
ps2_end_command(ps2dev);
psmouse_activate(psmouse);
psmouse_dbg(psmouse,
"READ PAGE REG: 0x%02x (rc = %d)\n",
*reg_val, rc);
return rc;
}
static int fsp_page_reg_write(struct psmouse *psmouse, int reg_val)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char v;
int rc = -1;
ps2_begin_command(ps2dev);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
ps2_sendbyte(ps2dev, 0x38, FSP_CMD_TIMEOUT2);
ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
goto out;
if ((v = fsp_test_invert_cmd(reg_val)) != reg_val) {
ps2_sendbyte(ps2dev, 0x47, FSP_CMD_TIMEOUT2);
} else if ((v = fsp_test_swap_cmd(reg_val)) != reg_val) {
/* swapping is required */
ps2_sendbyte(ps2dev, 0x44, FSP_CMD_TIMEOUT2);
} else {
/* swapping isn't necessary */
ps2_sendbyte(ps2dev, 0x33, FSP_CMD_TIMEOUT2);
}
ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
rc = 0;
out:
ps2_end_command(ps2dev);
psmouse_dbg(psmouse,
"WRITE PAGE REG: to 0x%02x (rc = %d)\n",
reg_val, rc);
return rc;
}
static int fsp_get_version(struct psmouse *psmouse, int *version)
{
if (fsp_reg_read(psmouse, FSP_REG_VERSION, version))
return -EIO;
return 0;
}
static int fsp_get_revision(struct psmouse *psmouse, int *rev)
{
if (fsp_reg_read(psmouse, FSP_REG_REVISION, rev))
return -EIO;
return 0;
}
static int fsp_get_sn(struct psmouse *psmouse, int *sn)
{
int v0, v1, v2;
int rc = -EIO;
/* production number since Cx is available at: 0x0b40 ~ 0x0b42 */
if (fsp_page_reg_write(psmouse, FSP_PAGE_0B))
goto out;
if (fsp_reg_read(psmouse, FSP_REG_SN0, &v0))
goto out;
if (fsp_reg_read(psmouse, FSP_REG_SN1, &v1))
goto out;
if (fsp_reg_read(psmouse, FSP_REG_SN2, &v2))
goto out;
*sn = (v0 << 16) | (v1 << 8) | v2;
rc = 0;
out:
fsp_page_reg_write(psmouse, FSP_PAGE_DEFAULT);
return rc;
}
static int fsp_get_buttons(struct psmouse *psmouse, int *btn)
{
static const int buttons[] = {
0x16, /* Left/Middle/Right/Forward/Backward & Scroll Up/Down */
0x06, /* Left/Middle/Right & Scroll Up/Down/Right/Left */
0x04, /* Left/Middle/Right & Scroll Up/Down */
0x02, /* Left/Middle/Right */
};
int val;
if (fsp_reg_read(psmouse, FSP_REG_TMOD_STATUS, &val) == -1)
return -EIO;
*btn = buttons[(val & 0x30) >> 4];
return 0;
}
/* Enable on-pad command tag output */
static int fsp_opc_tag_enable(struct psmouse *psmouse, bool enable)
{
int v, nv;
int res = 0;
if (fsp_reg_read(psmouse, FSP_REG_OPC_QDOWN, &v) == -1) {
psmouse_err(psmouse, "Unable get OPC state.\n");
return -EIO;
}
if (enable)
nv = v | FSP_BIT_EN_OPC_TAG;
else
nv = v & ~FSP_BIT_EN_OPC_TAG;
/* only write if necessary */
if (nv != v) {
fsp_reg_write_enable(psmouse, true);
res = fsp_reg_write(psmouse, FSP_REG_OPC_QDOWN, nv);
fsp_reg_write_enable(psmouse, false);
}
if (res != 0) {
psmouse_err(psmouse, "Unable to enable OPC tag.\n");
res = -EIO;
}
return res;
}
static int fsp_onpad_vscr(struct psmouse *psmouse, bool enable)
{
struct fsp_data *pad = psmouse->private;
int val;
if (fsp_reg_read(psmouse, FSP_REG_ONPAD_CTL, &val))
return -EIO;
pad->vscroll = enable;
if (enable)
val |= (FSP_BIT_FIX_VSCR | FSP_BIT_ONPAD_ENABLE);
else
val &= ~FSP_BIT_FIX_VSCR;
if (fsp_reg_write(psmouse, FSP_REG_ONPAD_CTL, val))
return -EIO;
return 0;
}
static int fsp_onpad_hscr(struct psmouse *psmouse, bool enable)
{
struct fsp_data *pad = psmouse->private;
int val, v2;
if (fsp_reg_read(psmouse, FSP_REG_ONPAD_CTL, &val))
return -EIO;
if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &v2))
return -EIO;
pad->hscroll = enable;
if (enable) {
val |= (FSP_BIT_FIX_HSCR | FSP_BIT_ONPAD_ENABLE);
v2 |= FSP_BIT_EN_MSID6;
} else {
val &= ~FSP_BIT_FIX_HSCR;
v2 &= ~(FSP_BIT_EN_MSID6 | FSP_BIT_EN_MSID7 | FSP_BIT_EN_MSID8);
}
if (fsp_reg_write(psmouse, FSP_REG_ONPAD_CTL, val))
return -EIO;
/* reconfigure horizontal scrolling packet output */
if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, v2))
return -EIO;
return 0;
}
/*
* Write device specific initial parameters.
*
* ex: 0xab 0xcd - write oxcd into register 0xab
*/
static ssize_t fsp_attr_set_setreg(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
unsigned int reg, val;
char *rest;
ssize_t retval;
reg = simple_strtoul(buf, &rest, 16);
if (rest == buf || *rest != ' ' || reg > 0xff)
return -EINVAL;
retval = kstrtouint(rest + 1, 16, &val);
if (retval)
return retval;
if (val > 0xff)
return -EINVAL;
if (fsp_reg_write_enable(psmouse, true))
return -EIO;
retval = fsp_reg_write(psmouse, reg, val) < 0 ? -EIO : count;
fsp_reg_write_enable(psmouse, false);
return retval;
}
PSMOUSE_DEFINE_WO_ATTR(setreg, S_IWUSR, NULL, fsp_attr_set_setreg);
static ssize_t fsp_attr_show_getreg(struct psmouse *psmouse,
void *data, char *buf)
{
struct fsp_data *pad = psmouse->private;
return sprintf(buf, "%02x%02x\n", pad->last_reg, pad->last_val);
}
/*
* Read a register from device.
*
* ex: 0xab -- read content from register 0xab
*/
static ssize_t fsp_attr_set_getreg(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
struct fsp_data *pad = psmouse->private;
unsigned int reg, val;
int err;
err = kstrtouint(buf, 16, ®);
if (err)
return err;
if (reg > 0xff)
return -EINVAL;
if (fsp_reg_read(psmouse, reg, &val))
return -EIO;
pad->last_reg = reg;
pad->last_val = val;
return count;
}
PSMOUSE_DEFINE_ATTR(getreg, S_IWUSR | S_IRUGO, NULL,
fsp_attr_show_getreg, fsp_attr_set_getreg);
static ssize_t fsp_attr_show_pagereg(struct psmouse *psmouse,
void *data, char *buf)
{
int val = 0;
if (fsp_page_reg_read(psmouse, &val))
return -EIO;
return sprintf(buf, "%02x\n", val);
}
static ssize_t fsp_attr_set_pagereg(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
unsigned int val;
int err;
err = kstrtouint(buf, 16, &val);
if (err)
return err;
if (val > 0xff)
return -EINVAL;
if (fsp_page_reg_write(psmouse, val))
return -EIO;
return count;
}
PSMOUSE_DEFINE_ATTR(page, S_IWUSR | S_IRUGO, NULL,
fsp_attr_show_pagereg, fsp_attr_set_pagereg);
static ssize_t fsp_attr_show_vscroll(struct psmouse *psmouse,
void *data, char *buf)
{
struct fsp_data *pad = psmouse->private;
return sprintf(buf, "%d\n", pad->vscroll);
}
static ssize_t fsp_attr_set_vscroll(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
unsigned int val;
int err;
err = kstrtouint(buf, 10, &val);
if (err)
return err;
if (val > 1)
return -EINVAL;
fsp_onpad_vscr(psmouse, val);
return count;
}
PSMOUSE_DEFINE_ATTR(vscroll, S_IWUSR | S_IRUGO, NULL,
fsp_attr_show_vscroll, fsp_attr_set_vscroll);
static ssize_t fsp_attr_show_hscroll(struct psmouse *psmouse,
void *data, char *buf)
{
struct fsp_data *pad = psmouse->private;
return sprintf(buf, "%d\n", pad->hscroll);
}
static ssize_t fsp_attr_set_hscroll(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
unsigned int val;
int err;
err = kstrtouint(buf, 10, &val);
if (err)
return err;
if (val > 1)
return -EINVAL;
fsp_onpad_hscr(psmouse, val);
return count;
}
PSMOUSE_DEFINE_ATTR(hscroll, S_IWUSR | S_IRUGO, NULL,
fsp_attr_show_hscroll, fsp_attr_set_hscroll);
static ssize_t fsp_attr_show_flags(struct psmouse *psmouse,
void *data, char *buf)
{
struct fsp_data *pad = psmouse->private;
return sprintf(buf, "%c\n",
pad->flags & FSPDRV_FLAG_EN_OPC ? 'C' : 'c');
}
static ssize_t fsp_attr_set_flags(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
struct fsp_data *pad = psmouse->private;
size_t i;
for (i = 0; i < count; i++) {
switch (buf[i]) {
case 'C':
pad->flags |= FSPDRV_FLAG_EN_OPC;
break;
case 'c':
pad->flags &= ~FSPDRV_FLAG_EN_OPC;
break;
default:
return -EINVAL;
}
}
return count;
}
PSMOUSE_DEFINE_ATTR(flags, S_IWUSR | S_IRUGO, NULL,
fsp_attr_show_flags, fsp_attr_set_flags);
static ssize_t fsp_attr_show_ver(struct psmouse *psmouse,
void *data, char *buf)
{
return sprintf(buf, "Sentelic FSP kernel module %s\n", fsp_drv_ver);
}
PSMOUSE_DEFINE_RO_ATTR(ver, S_IRUGO, NULL, fsp_attr_show_ver);
static struct attribute *fsp_attributes[] = {
&psmouse_attr_setreg.dattr.attr,
&psmouse_attr_getreg.dattr.attr,
&psmouse_attr_page.dattr.attr,
&psmouse_attr_vscroll.dattr.attr,
&psmouse_attr_hscroll.dattr.attr,
&psmouse_attr_flags.dattr.attr,
&psmouse_attr_ver.dattr.attr,
NULL
};
static struct attribute_group fsp_attribute_group = {
.attrs = fsp_attributes,
};
#ifdef FSP_DEBUG
static void fsp_packet_debug(struct psmouse *psmouse, unsigned char packet[])
{
static unsigned int ps2_packet_cnt;
static unsigned int ps2_last_second;
unsigned int jiffies_msec;
const char *packet_type = "UNKNOWN";
unsigned short abs_x = 0, abs_y = 0;
/* Interpret & dump the packet data. */
switch (packet[0] >> FSP_PKT_TYPE_SHIFT) {
case FSP_PKT_TYPE_ABS:
packet_type = "Absolute";
abs_x = GET_ABS_X(packet);
abs_y = GET_ABS_Y(packet);
break;
case FSP_PKT_TYPE_NORMAL:
packet_type = "Normal";
break;
case FSP_PKT_TYPE_NOTIFY:
packet_type = "Notify";
break;
case FSP_PKT_TYPE_NORMAL_OPC:
packet_type = "Normal-OPC";
break;
}
ps2_packet_cnt++;
jiffies_msec = jiffies_to_msecs(jiffies);
psmouse_dbg(psmouse,
"%08dms %s packets: %02x, %02x, %02x, %02x; "
"abs_x: %d, abs_y: %d\n",
jiffies_msec, packet_type,
packet[0], packet[1], packet[2], packet[3], abs_x, abs_y);
if (jiffies_msec - ps2_last_second > 1000) {
psmouse_dbg(psmouse, "PS/2 packets/sec = %d\n", ps2_packet_cnt);
ps2_packet_cnt = 0;
ps2_last_second = jiffies_msec;
}
}
#else
static void fsp_packet_debug(struct psmouse *psmouse, unsigned char packet[])
{
}
#endif
static void fsp_set_slot(struct input_dev *dev, int slot, bool active,
unsigned int x, unsigned int y)
{
input_mt_slot(dev, slot);
input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
if (active) {
input_report_abs(dev, ABS_MT_POSITION_X, x);
input_report_abs(dev, ABS_MT_POSITION_Y, y);
}
}
static psmouse_ret_t fsp_process_byte(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
struct fsp_data *ad = psmouse->private;
unsigned char *packet = psmouse->packet;
unsigned char button_status = 0, lscroll = 0, rscroll = 0;
unsigned short abs_x, abs_y, fgrs = 0;
if (psmouse->pktcnt < 4)
return PSMOUSE_GOOD_DATA;
/*
* Full packet accumulated, process it
*/
fsp_packet_debug(psmouse, packet);
switch (psmouse->packet[0] >> FSP_PKT_TYPE_SHIFT) {
case FSP_PKT_TYPE_ABS:
if ((packet[0] == 0x48 || packet[0] == 0x49) &&
packet[1] == 0 && packet[2] == 0) {
/*
* Ignore coordinate noise when finger leaving the
* surface, otherwise cursor may jump to upper-left
* corner.
*/
packet[3] &= 0xf0;
}
abs_x = GET_ABS_X(packet);
abs_y = GET_ABS_Y(packet);
if (packet[0] & FSP_PB0_MFMC) {
/*
* MFMC packet: assume that there are two fingers on
* pad
*/
fgrs = 2;
/* MFMC packet */
if (packet[0] & FSP_PB0_MFMC_FGR2) {
/* 2nd finger */
if (ad->last_mt_fgr == 2) {
/*
* workaround for buggy firmware
* which doesn't clear MFMC bit if
* the 1st finger is up
*/
fgrs = 1;
fsp_set_slot(dev, 0, false, 0, 0);
}
ad->last_mt_fgr = 2;
fsp_set_slot(dev, 1, fgrs == 2, abs_x, abs_y);
} else {
/* 1st finger */
if (ad->last_mt_fgr == 1) {
/*
* workaround for buggy firmware
* which doesn't clear MFMC bit if
* the 2nd finger is up
*/
fgrs = 1;
fsp_set_slot(dev, 1, false, 0, 0);
}
ad->last_mt_fgr = 1;
fsp_set_slot(dev, 0, fgrs != 0, abs_x, abs_y);
}
} else {
/* SFAC packet */
if ((packet[0] & (FSP_PB0_LBTN|FSP_PB0_PHY_BTN)) ==
FSP_PB0_LBTN) {
/* On-pad click in SFAC mode should be handled
* by userspace. On-pad clicks in MFMC mode
* are real clickpad clicks, and not ignored.
*/
packet[0] &= ~FSP_PB0_LBTN;
}
/* no multi-finger information */
ad->last_mt_fgr = 0;
if (abs_x != 0 && abs_y != 0)
fgrs = 1;
fsp_set_slot(dev, 0, fgrs > 0, abs_x, abs_y);
fsp_set_slot(dev, 1, false, 0, 0);
}
if (fgrs == 1 || (fgrs == 2 && !(packet[0] & FSP_PB0_MFMC_FGR2))) {
input_report_abs(dev, ABS_X, abs_x);
input_report_abs(dev, ABS_Y, abs_y);
}
input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
input_report_key(dev, BTN_TOUCH, fgrs);
input_report_key(dev, BTN_TOOL_FINGER, fgrs == 1);
input_report_key(dev, BTN_TOOL_DOUBLETAP, fgrs == 2);
break;
case FSP_PKT_TYPE_NORMAL_OPC:
/* on-pad click, filter it if necessary */
if ((ad->flags & FSPDRV_FLAG_EN_OPC) != FSPDRV_FLAG_EN_OPC)
packet[0] &= ~FSP_PB0_LBTN;
fallthrough;
case FSP_PKT_TYPE_NORMAL:
/* normal packet */
/* special packet data translation from on-pad packets */
if (packet[3] != 0) {
if (packet[3] & BIT(0))
button_status |= 0x01; /* wheel down */
if (packet[3] & BIT(1))
button_status |= 0x0f; /* wheel up */
if (packet[3] & BIT(2))
button_status |= BIT(4);/* horizontal left */
if (packet[3] & BIT(3))
button_status |= BIT(5);/* horizontal right */
/* push back to packet queue */
if (button_status != 0)
packet[3] = button_status;
rscroll = (packet[3] >> 4) & 1;
lscroll = (packet[3] >> 5) & 1;
}
/*
* Processing wheel up/down and extra button events
*/
input_report_rel(dev, REL_WHEEL,
(int)(packet[3] & 8) - (int)(packet[3] & 7));
input_report_rel(dev, REL_HWHEEL, lscroll - rscroll);
input_report_key(dev, BTN_BACK, lscroll);
input_report_key(dev, BTN_FORWARD, rscroll);
/*
* Standard PS/2 Mouse
*/
psmouse_report_standard_packet(dev, packet);
break;
}
input_sync(dev);
return PSMOUSE_FULL_PACKET;
}
static int fsp_activate_protocol(struct psmouse *psmouse)
{
struct fsp_data *pad = psmouse->private;
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char param[2];
int val;
/*
* Standard procedure to enter FSP Intellimouse mode
* (scrolling wheel, 4th and 5th buttons)
*/
param[0] = 200;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 200;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 80;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
if (param[0] != 0x04) {
psmouse_err(psmouse,
"Unable to enable 4 bytes packet format.\n");
return -EIO;
}
if (pad->ver < FSP_VER_STL3888_C0) {
/* Preparing relative coordinates output for older hardware */
if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &val)) {
psmouse_err(psmouse,
"Unable to read SYSCTL5 register.\n");
return -EIO;
}
if (fsp_get_buttons(psmouse, &pad->buttons)) {
psmouse_err(psmouse,
"Unable to retrieve number of buttons.\n");
return -EIO;
}
val &= ~(FSP_BIT_EN_MSID7 | FSP_BIT_EN_MSID8 | FSP_BIT_EN_AUTO_MSID8);
/* Ensure we are not in absolute mode */
val &= ~FSP_BIT_EN_PKT_G0;
if (pad->buttons == 0x06) {
/* Left/Middle/Right & Scroll Up/Down/Right/Left */
val |= FSP_BIT_EN_MSID6;
}
if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, val)) {
psmouse_err(psmouse,
"Unable to set up required mode bits.\n");
return -EIO;
}
/*
* Enable OPC tags such that driver can tell the difference
* between on-pad and real button click
*/
if (fsp_opc_tag_enable(psmouse, true))
psmouse_warn(psmouse,
"Failed to enable OPC tag mode.\n");
/* enable on-pad click by default */
pad->flags |= FSPDRV_FLAG_EN_OPC;
/* Enable on-pad vertical and horizontal scrolling */
fsp_onpad_vscr(psmouse, true);
fsp_onpad_hscr(psmouse, true);
} else {
/* Enable absolute coordinates output for Cx/Dx hardware */
if (fsp_reg_write(psmouse, FSP_REG_SWC1,
FSP_BIT_SWC1_EN_ABS_1F |
FSP_BIT_SWC1_EN_ABS_2F |
FSP_BIT_SWC1_EN_FUP_OUT |
FSP_BIT_SWC1_EN_ABS_CON)) {
psmouse_err(psmouse,
"Unable to enable absolute coordinates output.\n");
return -EIO;
}
}
return 0;
}
static int fsp_set_input_params(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
struct fsp_data *pad = psmouse->private;
if (pad->ver < FSP_VER_STL3888_C0) {
__set_bit(BTN_MIDDLE, dev->keybit);
__set_bit(BTN_BACK, dev->keybit);
__set_bit(BTN_FORWARD, dev->keybit);
__set_bit(REL_WHEEL, dev->relbit);
__set_bit(REL_HWHEEL, dev->relbit);
} else {
/*
* Hardware prior to Cx performs much better in relative mode;
* hence, only enable absolute coordinates output as well as
* multi-touch output for the newer hardware.
*
* Maximum coordinates can be computed as:
*
* number of scanlines * 64 - 57
*
* where number of X/Y scanline lines are 16/12.
*/
int abs_x = 967, abs_y = 711;
__set_bit(EV_ABS, dev->evbit);
__clear_bit(EV_REL, dev->evbit);
__set_bit(BTN_TOUCH, dev->keybit);
__set_bit(BTN_TOOL_FINGER, dev->keybit);
__set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
__set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
input_set_abs_params(dev, ABS_X, 0, abs_x, 0, 0);
input_set_abs_params(dev, ABS_Y, 0, abs_y, 0, 0);
input_mt_init_slots(dev, 2, 0);
input_set_abs_params(dev, ABS_MT_POSITION_X, 0, abs_x, 0, 0);
input_set_abs_params(dev, ABS_MT_POSITION_Y, 0, abs_y, 0, 0);
}
return 0;
}
int fsp_detect(struct psmouse *psmouse, bool set_properties)
{
int id;
if (fsp_reg_read(psmouse, FSP_REG_DEVICE_ID, &id))
return -EIO;
if (id != 0x01)
return -ENODEV;
if (set_properties) {
psmouse->vendor = "Sentelic";
psmouse->name = "FingerSensingPad";
}
return 0;
}
static void fsp_reset(struct psmouse *psmouse)
{
fsp_opc_tag_enable(psmouse, false);
fsp_onpad_vscr(psmouse, false);
fsp_onpad_hscr(psmouse, false);
}
static void fsp_disconnect(struct psmouse *psmouse)
{
sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
&fsp_attribute_group);
fsp_reset(psmouse);
kfree(psmouse->private);
}
static int fsp_reconnect(struct psmouse *psmouse)
{
int version;
if (fsp_detect(psmouse, 0))
return -ENODEV;
if (fsp_get_version(psmouse, &version))
return -ENODEV;
if (fsp_activate_protocol(psmouse))
return -EIO;
return 0;
}
int fsp_init(struct psmouse *psmouse)
{
struct fsp_data *priv;
int ver, rev, sn = 0;
int error;
if (fsp_get_version(psmouse, &ver) ||
fsp_get_revision(psmouse, &rev)) {
return -ENODEV;
}
if (ver >= FSP_VER_STL3888_C0) {
/* firmware information is only available since C0 */
fsp_get_sn(psmouse, &sn);
}
psmouse_info(psmouse,
"Finger Sensing Pad, hw: %d.%d.%d, sn: %x, sw: %s\n",
ver >> 4, ver & 0x0F, rev, sn, fsp_drv_ver);
psmouse->private = priv = kzalloc(sizeof(struct fsp_data), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->ver = ver;
priv->rev = rev;
psmouse->protocol_handler = fsp_process_byte;
psmouse->disconnect = fsp_disconnect;
psmouse->reconnect = fsp_reconnect;
psmouse->cleanup = fsp_reset;
psmouse->pktsize = 4;
error = fsp_activate_protocol(psmouse);
if (error)
goto err_out;
/* Set up various supported input event bits */
error = fsp_set_input_params(psmouse);
if (error)
goto err_out;
error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
&fsp_attribute_group);
if (error) {
psmouse_err(psmouse,
"Failed to create sysfs attributes (%d)", error);
goto err_out;
}
return 0;
err_out:
kfree(psmouse->private);
psmouse->private = NULL;
return error;
}
|
linux-master
|
drivers/input/mouse/sentelic.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Synaptics NavPoint (PXA27x SSP/SPI) driver.
*
* Copyright (C) 2012 Paul Parsons <[email protected]>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/input.h>
#include <linux/input/navpoint.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/pxa2xx_ssp.h>
#include <linux/slab.h>
/*
* Synaptics Modular Embedded Protocol: Module Packet Format.
* Module header byte 2:0 = Length (# bytes that follow)
* Module header byte 4:3 = Control
* Module header byte 7:5 = Module Address
*/
#define HEADER_LENGTH(byte) ((byte) & 0x07)
#define HEADER_CONTROL(byte) (((byte) >> 3) & 0x03)
#define HEADER_ADDRESS(byte) ((byte) >> 5)
struct navpoint {
struct ssp_device *ssp;
struct input_dev *input;
struct device *dev;
int gpio;
int index;
u8 data[1 + HEADER_LENGTH(0xff)];
};
/*
* Initialization values for SSCR0_x, SSCR1_x, SSSR_x.
*/
static const u32 sscr0 = 0
| SSCR0_TUM /* TIM = 1; No TUR interrupts */
| SSCR0_RIM /* RIM = 1; No ROR interrupts */
| SSCR0_SSE /* SSE = 1; SSP enabled */
| SSCR0_Motorola /* FRF = 0; Motorola SPI */
| SSCR0_DataSize(16) /* DSS = 15; Data size = 16-bit */
;
static const u32 sscr1 = 0
| SSCR1_SCFR /* SCFR = 1; SSPSCLK only during transfers */
| SSCR1_SCLKDIR /* SCLKDIR = 1; Slave mode */
| SSCR1_SFRMDIR /* SFRMDIR = 1; Slave mode */
| SSCR1_RWOT /* RWOT = 1; Receive without transmit mode */
| SSCR1_RxTresh(1) /* RFT = 0; Receive FIFO threshold = 1 */
| SSCR1_SPH /* SPH = 1; SSPSCLK inactive 0.5 + 1 cycles */
| SSCR1_RIE /* RIE = 1; Receive FIFO interrupt enabled */
;
static const u32 sssr = 0
| SSSR_BCE /* BCE = 1; Clear BCE */
| SSSR_TUR /* TUR = 1; Clear TUR */
| SSSR_EOC /* EOC = 1; Clear EOC */
| SSSR_TINT /* TINT = 1; Clear TINT */
| SSSR_PINT /* PINT = 1; Clear PINT */
| SSSR_ROR /* ROR = 1; Clear ROR */
;
/*
* MEP Query $22: Touchpad Coordinate Range Query is not supported by
* the NavPoint module, so sampled values provide the default limits.
*/
#define NAVPOINT_X_MIN 1278
#define NAVPOINT_X_MAX 5340
#define NAVPOINT_Y_MIN 1572
#define NAVPOINT_Y_MAX 4396
#define NAVPOINT_PRESSURE_MIN 0
#define NAVPOINT_PRESSURE_MAX 255
static void navpoint_packet(struct navpoint *navpoint)
{
int finger;
int gesture;
int x, y, z;
switch (navpoint->data[0]) {
case 0xff: /* Garbage (packet?) between reset and Hello packet */
case 0x00: /* Module 0, NULL packet */
break;
case 0x0e: /* Module 0, Absolute packet */
finger = (navpoint->data[1] & 0x01);
gesture = (navpoint->data[1] & 0x02);
x = ((navpoint->data[2] & 0x1f) << 8) | navpoint->data[3];
y = ((navpoint->data[4] & 0x1f) << 8) | navpoint->data[5];
z = navpoint->data[6];
input_report_key(navpoint->input, BTN_TOUCH, finger);
input_report_abs(navpoint->input, ABS_X, x);
input_report_abs(navpoint->input, ABS_Y, y);
input_report_abs(navpoint->input, ABS_PRESSURE, z);
input_report_key(navpoint->input, BTN_TOOL_FINGER, finger);
input_report_key(navpoint->input, BTN_LEFT, gesture);
input_sync(navpoint->input);
break;
case 0x19: /* Module 0, Hello packet */
if ((navpoint->data[1] & 0xf0) == 0x10)
break;
fallthrough;
default:
dev_warn(navpoint->dev,
"spurious packet: data=0x%02x,0x%02x,...\n",
navpoint->data[0], navpoint->data[1]);
break;
}
}
static irqreturn_t navpoint_irq(int irq, void *dev_id)
{
struct navpoint *navpoint = dev_id;
struct ssp_device *ssp = navpoint->ssp;
irqreturn_t ret = IRQ_NONE;
u32 status;
status = pxa_ssp_read_reg(ssp, SSSR);
if (status & sssr) {
dev_warn(navpoint->dev,
"unexpected interrupt: status=0x%08x\n", status);
pxa_ssp_write_reg(ssp, SSSR, (status & sssr));
ret = IRQ_HANDLED;
}
while (status & SSSR_RNE) {
u32 data;
data = pxa_ssp_read_reg(ssp, SSDR);
navpoint->data[navpoint->index + 0] = (data >> 8);
navpoint->data[navpoint->index + 1] = data;
navpoint->index += 2;
if (HEADER_LENGTH(navpoint->data[0]) < navpoint->index) {
navpoint_packet(navpoint);
navpoint->index = 0;
}
status = pxa_ssp_read_reg(ssp, SSSR);
ret = IRQ_HANDLED;
}
return ret;
}
static void navpoint_up(struct navpoint *navpoint)
{
struct ssp_device *ssp = navpoint->ssp;
int timeout;
clk_prepare_enable(ssp->clk);
pxa_ssp_write_reg(ssp, SSCR1, sscr1);
pxa_ssp_write_reg(ssp, SSSR, sssr);
pxa_ssp_write_reg(ssp, SSTO, 0);
pxa_ssp_write_reg(ssp, SSCR0, sscr0); /* SSCR0_SSE written last */
/* Wait until SSP port is ready for slave clock operations */
for (timeout = 100; timeout != 0; --timeout) {
if (!(pxa_ssp_read_reg(ssp, SSSR) & SSSR_CSS))
break;
msleep(1);
}
if (timeout == 0)
dev_err(navpoint->dev,
"timeout waiting for SSSR[CSS] to clear\n");
if (gpio_is_valid(navpoint->gpio))
gpio_set_value(navpoint->gpio, 1);
}
static void navpoint_down(struct navpoint *navpoint)
{
struct ssp_device *ssp = navpoint->ssp;
if (gpio_is_valid(navpoint->gpio))
gpio_set_value(navpoint->gpio, 0);
pxa_ssp_write_reg(ssp, SSCR0, 0);
clk_disable_unprepare(ssp->clk);
}
static int navpoint_open(struct input_dev *input)
{
struct navpoint *navpoint = input_get_drvdata(input);
navpoint_up(navpoint);
return 0;
}
static void navpoint_close(struct input_dev *input)
{
struct navpoint *navpoint = input_get_drvdata(input);
navpoint_down(navpoint);
}
static int navpoint_probe(struct platform_device *pdev)
{
const struct navpoint_platform_data *pdata =
dev_get_platdata(&pdev->dev);
struct ssp_device *ssp;
struct input_dev *input;
struct navpoint *navpoint;
int error;
if (!pdata) {
dev_err(&pdev->dev, "no platform data\n");
return -EINVAL;
}
if (gpio_is_valid(pdata->gpio)) {
error = gpio_request_one(pdata->gpio, GPIOF_OUT_INIT_LOW,
"SYNAPTICS_ON");
if (error)
return error;
}
ssp = pxa_ssp_request(pdata->port, pdev->name);
if (!ssp) {
error = -ENODEV;
goto err_free_gpio;
}
/* HaRET does not disable devices before jumping into Linux */
if (pxa_ssp_read_reg(ssp, SSCR0) & SSCR0_SSE) {
pxa_ssp_write_reg(ssp, SSCR0, 0);
dev_warn(&pdev->dev, "ssp%d already enabled\n", pdata->port);
}
navpoint = kzalloc(sizeof(*navpoint), GFP_KERNEL);
input = input_allocate_device();
if (!navpoint || !input) {
error = -ENOMEM;
goto err_free_mem;
}
navpoint->ssp = ssp;
navpoint->input = input;
navpoint->dev = &pdev->dev;
navpoint->gpio = pdata->gpio;
input->name = pdev->name;
input->dev.parent = &pdev->dev;
__set_bit(EV_KEY, input->evbit);
__set_bit(EV_ABS, input->evbit);
__set_bit(BTN_LEFT, input->keybit);
__set_bit(BTN_TOUCH, input->keybit);
__set_bit(BTN_TOOL_FINGER, input->keybit);
input_set_abs_params(input, ABS_X,
NAVPOINT_X_MIN, NAVPOINT_X_MAX, 0, 0);
input_set_abs_params(input, ABS_Y,
NAVPOINT_Y_MIN, NAVPOINT_Y_MAX, 0, 0);
input_set_abs_params(input, ABS_PRESSURE,
NAVPOINT_PRESSURE_MIN, NAVPOINT_PRESSURE_MAX,
0, 0);
input->open = navpoint_open;
input->close = navpoint_close;
input_set_drvdata(input, navpoint);
error = request_irq(ssp->irq, navpoint_irq, 0, pdev->name, navpoint);
if (error)
goto err_free_mem;
error = input_register_device(input);
if (error)
goto err_free_irq;
platform_set_drvdata(pdev, navpoint);
dev_dbg(&pdev->dev, "ssp%d, irq %d\n", pdata->port, ssp->irq);
return 0;
err_free_irq:
free_irq(ssp->irq, navpoint);
err_free_mem:
input_free_device(input);
kfree(navpoint);
pxa_ssp_free(ssp);
err_free_gpio:
if (gpio_is_valid(pdata->gpio))
gpio_free(pdata->gpio);
return error;
}
static int navpoint_remove(struct platform_device *pdev)
{
const struct navpoint_platform_data *pdata =
dev_get_platdata(&pdev->dev);
struct navpoint *navpoint = platform_get_drvdata(pdev);
struct ssp_device *ssp = navpoint->ssp;
free_irq(ssp->irq, navpoint);
input_unregister_device(navpoint->input);
kfree(navpoint);
pxa_ssp_free(ssp);
if (gpio_is_valid(pdata->gpio))
gpio_free(pdata->gpio);
return 0;
}
static int navpoint_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct navpoint *navpoint = platform_get_drvdata(pdev);
struct input_dev *input = navpoint->input;
mutex_lock(&input->mutex);
if (input_device_enabled(input))
navpoint_down(navpoint);
mutex_unlock(&input->mutex);
return 0;
}
static int navpoint_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct navpoint *navpoint = platform_get_drvdata(pdev);
struct input_dev *input = navpoint->input;
mutex_lock(&input->mutex);
if (input_device_enabled(input))
navpoint_up(navpoint);
mutex_unlock(&input->mutex);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(navpoint_pm_ops,
navpoint_suspend, navpoint_resume);
static struct platform_driver navpoint_driver = {
.probe = navpoint_probe,
.remove = navpoint_remove,
.driver = {
.name = "navpoint",
.pm = pm_sleep_ptr(&navpoint_pm_ops),
},
};
module_platform_driver(navpoint_driver);
MODULE_AUTHOR("Paul Parsons <[email protected]>");
MODULE_DESCRIPTION("Synaptics NavPoint (PXA27x SSP/SPI) driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:navpoint");
|
linux-master
|
drivers/input/mouse/navpoint.c
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* USB Synaptics device driver
*
* Copyright (c) 2002 Rob Miller (rob@inpharmatica . co . uk)
* Copyright (c) 2003 Ron Lee ([email protected])
* cPad driver for kernel 2.4
*
* Copyright (c) 2004 Jan Steinhoff (cpad@jan-steinhoff . de)
* Copyright (c) 2004 Ron Lee ([email protected])
* rewritten for kernel 2.6
*
* cPad display character device part is not included. It can be found at
* http://jan-steinhoff.de/linux/synaptics-usb.html
*
* Bases on: usb_skeleton.c v2.2 by Greg Kroah-Hartman
* drivers/hid/usbhid/usbmouse.c by Vojtech Pavlik
* drivers/input/mouse/synaptics.c by Peter Osterlund
*
* Trademarks are the property of their respective owners.
*/
/*
* There are three different types of Synaptics USB devices: Touchpads,
* touchsticks (or trackpoints), and touchscreens. Touchpads are well supported
* by this driver, touchstick support has not been tested much yet, and
* touchscreens have not been tested at all.
*
* Up to three alternate settings are possible:
* setting 0: one int endpoint for relative movement (used by usbhid.ko)
* setting 1: one int endpoint for absolute finger position
* setting 2 (cPad only): one int endpoint for absolute finger position and
* two bulk endpoints for the display (in/out)
* This driver uses setting 1.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/usb.h>
#include <linux/input.h>
#include <linux/usb/input.h>
#define USB_VENDOR_ID_SYNAPTICS 0x06cb
#define USB_DEVICE_ID_SYNAPTICS_TP 0x0001 /* Synaptics USB TouchPad */
#define USB_DEVICE_ID_SYNAPTICS_INT_TP 0x0002 /* Integrated USB TouchPad */
#define USB_DEVICE_ID_SYNAPTICS_CPAD 0x0003 /* Synaptics cPad */
#define USB_DEVICE_ID_SYNAPTICS_TS 0x0006 /* Synaptics TouchScreen */
#define USB_DEVICE_ID_SYNAPTICS_STICK 0x0007 /* Synaptics USB Styk */
#define USB_DEVICE_ID_SYNAPTICS_WP 0x0008 /* Synaptics USB WheelPad */
#define USB_DEVICE_ID_SYNAPTICS_COMP_TP 0x0009 /* Composite USB TouchPad */
#define USB_DEVICE_ID_SYNAPTICS_WTP 0x0010 /* Wireless TouchPad */
#define USB_DEVICE_ID_SYNAPTICS_DPAD 0x0013 /* DisplayPad */
#define SYNUSB_TOUCHPAD (1 << 0)
#define SYNUSB_STICK (1 << 1)
#define SYNUSB_TOUCHSCREEN (1 << 2)
#define SYNUSB_AUXDISPLAY (1 << 3) /* For cPad */
#define SYNUSB_COMBO (1 << 4) /* Composite device (TP + stick) */
#define SYNUSB_IO_ALWAYS (1 << 5)
#define USB_DEVICE_SYNAPTICS(prod, kind) \
USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, \
USB_DEVICE_ID_SYNAPTICS_##prod), \
.driver_info = (kind),
#define SYNUSB_RECV_SIZE 8
#define XMIN_NOMINAL 1472
#define XMAX_NOMINAL 5472
#define YMIN_NOMINAL 1408
#define YMAX_NOMINAL 4448
struct synusb {
struct usb_device *udev;
struct usb_interface *intf;
struct urb *urb;
unsigned char *data;
/* serialize access to open/suspend */
struct mutex pm_mutex;
bool is_open;
/* input device related data structures */
struct input_dev *input;
char name[128];
char phys[64];
/* characteristics of the device */
unsigned long flags;
};
static void synusb_report_buttons(struct synusb *synusb)
{
struct input_dev *input_dev = synusb->input;
input_report_key(input_dev, BTN_LEFT, synusb->data[1] & 0x04);
input_report_key(input_dev, BTN_RIGHT, synusb->data[1] & 0x01);
input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x02);
}
static void synusb_report_stick(struct synusb *synusb)
{
struct input_dev *input_dev = synusb->input;
int x, y;
unsigned int pressure;
pressure = synusb->data[6];
x = (s16)(be16_to_cpup((__be16 *)&synusb->data[2]) << 3) >> 7;
y = (s16)(be16_to_cpup((__be16 *)&synusb->data[4]) << 3) >> 7;
if (pressure > 0) {
input_report_rel(input_dev, REL_X, x);
input_report_rel(input_dev, REL_Y, -y);
}
input_report_abs(input_dev, ABS_PRESSURE, pressure);
synusb_report_buttons(synusb);
input_sync(input_dev);
}
static void synusb_report_touchpad(struct synusb *synusb)
{
struct input_dev *input_dev = synusb->input;
unsigned int num_fingers, tool_width;
unsigned int x, y;
unsigned int pressure, w;
pressure = synusb->data[6];
x = be16_to_cpup((__be16 *)&synusb->data[2]);
y = be16_to_cpup((__be16 *)&synusb->data[4]);
w = synusb->data[0] & 0x0f;
if (pressure > 0) {
num_fingers = 1;
tool_width = 5;
switch (w) {
case 0 ... 1:
num_fingers = 2 + w;
break;
case 2: /* pen, pretend its a finger */
break;
case 4 ... 15:
tool_width = w;
break;
}
} else {
num_fingers = 0;
tool_width = 0;
}
/*
* Post events
* BTN_TOUCH has to be first as mousedev relies on it when doing
* absolute -> relative conversion
*/
if (pressure > 30)
input_report_key(input_dev, BTN_TOUCH, 1);
if (pressure < 25)
input_report_key(input_dev, BTN_TOUCH, 0);
if (num_fingers > 0) {
input_report_abs(input_dev, ABS_X, x);
input_report_abs(input_dev, ABS_Y,
YMAX_NOMINAL + YMIN_NOMINAL - y);
}
input_report_abs(input_dev, ABS_PRESSURE, pressure);
input_report_abs(input_dev, ABS_TOOL_WIDTH, tool_width);
input_report_key(input_dev, BTN_TOOL_FINGER, num_fingers == 1);
input_report_key(input_dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
input_report_key(input_dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
synusb_report_buttons(synusb);
if (synusb->flags & SYNUSB_AUXDISPLAY)
input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x08);
input_sync(input_dev);
}
static void synusb_irq(struct urb *urb)
{
struct synusb *synusb = urb->context;
int error;
/* Check our status in case we need to bail out early. */
switch (urb->status) {
case 0:
usb_mark_last_busy(synusb->udev);
break;
/* Device went away so don't keep trying to read from it. */
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
return;
default:
goto resubmit;
break;
}
if (synusb->flags & SYNUSB_STICK)
synusb_report_stick(synusb);
else
synusb_report_touchpad(synusb);
resubmit:
error = usb_submit_urb(urb, GFP_ATOMIC);
if (error && error != -EPERM)
dev_err(&synusb->intf->dev,
"%s - usb_submit_urb failed with result: %d",
__func__, error);
}
static struct usb_endpoint_descriptor *
synusb_get_in_endpoint(struct usb_host_interface *iface)
{
struct usb_endpoint_descriptor *endpoint;
int i;
for (i = 0; i < iface->desc.bNumEndpoints; ++i) {
endpoint = &iface->endpoint[i].desc;
if (usb_endpoint_is_int_in(endpoint)) {
/* we found our interrupt in endpoint */
return endpoint;
}
}
return NULL;
}
static int synusb_open(struct input_dev *dev)
{
struct synusb *synusb = input_get_drvdata(dev);
int retval;
retval = usb_autopm_get_interface(synusb->intf);
if (retval) {
dev_err(&synusb->intf->dev,
"%s - usb_autopm_get_interface failed, error: %d\n",
__func__, retval);
return retval;
}
mutex_lock(&synusb->pm_mutex);
retval = usb_submit_urb(synusb->urb, GFP_KERNEL);
if (retval) {
dev_err(&synusb->intf->dev,
"%s - usb_submit_urb failed, error: %d\n",
__func__, retval);
retval = -EIO;
goto out;
}
synusb->intf->needs_remote_wakeup = 1;
synusb->is_open = true;
out:
mutex_unlock(&synusb->pm_mutex);
usb_autopm_put_interface(synusb->intf);
return retval;
}
static void synusb_close(struct input_dev *dev)
{
struct synusb *synusb = input_get_drvdata(dev);
int autopm_error;
autopm_error = usb_autopm_get_interface(synusb->intf);
mutex_lock(&synusb->pm_mutex);
usb_kill_urb(synusb->urb);
synusb->intf->needs_remote_wakeup = 0;
synusb->is_open = false;
mutex_unlock(&synusb->pm_mutex);
if (!autopm_error)
usb_autopm_put_interface(synusb->intf);
}
static int synusb_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(intf);
struct usb_endpoint_descriptor *ep;
struct synusb *synusb;
struct input_dev *input_dev;
unsigned int intf_num = intf->cur_altsetting->desc.bInterfaceNumber;
unsigned int altsetting = min(intf->num_altsetting, 1U);
int error;
error = usb_set_interface(udev, intf_num, altsetting);
if (error) {
dev_err(&udev->dev,
"Can not set alternate setting to %i, error: %i",
altsetting, error);
return error;
}
ep = synusb_get_in_endpoint(intf->cur_altsetting);
if (!ep)
return -ENODEV;
synusb = kzalloc(sizeof(*synusb), GFP_KERNEL);
input_dev = input_allocate_device();
if (!synusb || !input_dev) {
error = -ENOMEM;
goto err_free_mem;
}
synusb->udev = udev;
synusb->intf = intf;
synusb->input = input_dev;
mutex_init(&synusb->pm_mutex);
synusb->flags = id->driver_info;
if (synusb->flags & SYNUSB_COMBO) {
/*
* This is a combo device, we need to set proper
* capability, depending on the interface.
*/
synusb->flags |= intf_num == 1 ?
SYNUSB_STICK : SYNUSB_TOUCHPAD;
}
synusb->urb = usb_alloc_urb(0, GFP_KERNEL);
if (!synusb->urb) {
error = -ENOMEM;
goto err_free_mem;
}
synusb->data = usb_alloc_coherent(udev, SYNUSB_RECV_SIZE, GFP_KERNEL,
&synusb->urb->transfer_dma);
if (!synusb->data) {
error = -ENOMEM;
goto err_free_urb;
}
usb_fill_int_urb(synusb->urb, udev,
usb_rcvintpipe(udev, ep->bEndpointAddress),
synusb->data, SYNUSB_RECV_SIZE,
synusb_irq, synusb,
ep->bInterval);
synusb->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
if (udev->manufacturer)
strscpy(synusb->name, udev->manufacturer,
sizeof(synusb->name));
if (udev->product) {
if (udev->manufacturer)
strlcat(synusb->name, " ", sizeof(synusb->name));
strlcat(synusb->name, udev->product, sizeof(synusb->name));
}
if (!strlen(synusb->name))
snprintf(synusb->name, sizeof(synusb->name),
"USB Synaptics Device %04x:%04x",
le16_to_cpu(udev->descriptor.idVendor),
le16_to_cpu(udev->descriptor.idProduct));
if (synusb->flags & SYNUSB_STICK)
strlcat(synusb->name, " (Stick)", sizeof(synusb->name));
usb_make_path(udev, synusb->phys, sizeof(synusb->phys));
strlcat(synusb->phys, "/input0", sizeof(synusb->phys));
input_dev->name = synusb->name;
input_dev->phys = synusb->phys;
usb_to_input_id(udev, &input_dev->id);
input_dev->dev.parent = &synusb->intf->dev;
if (!(synusb->flags & SYNUSB_IO_ALWAYS)) {
input_dev->open = synusb_open;
input_dev->close = synusb_close;
}
input_set_drvdata(input_dev, synusb);
__set_bit(EV_ABS, input_dev->evbit);
__set_bit(EV_KEY, input_dev->evbit);
if (synusb->flags & SYNUSB_STICK) {
__set_bit(EV_REL, input_dev->evbit);
__set_bit(REL_X, input_dev->relbit);
__set_bit(REL_Y, input_dev->relbit);
__set_bit(INPUT_PROP_POINTING_STICK, input_dev->propbit);
input_set_abs_params(input_dev, ABS_PRESSURE, 0, 127, 0, 0);
} else {
input_set_abs_params(input_dev, ABS_X,
XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);
input_set_abs_params(input_dev, ABS_Y,
YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);
input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
input_set_abs_params(input_dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
__set_bit(BTN_TOUCH, input_dev->keybit);
__set_bit(BTN_TOOL_FINGER, input_dev->keybit);
__set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
__set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
}
if (synusb->flags & SYNUSB_TOUCHSCREEN)
__set_bit(INPUT_PROP_DIRECT, input_dev->propbit);
else
__set_bit(INPUT_PROP_POINTER, input_dev->propbit);
__set_bit(BTN_LEFT, input_dev->keybit);
__set_bit(BTN_RIGHT, input_dev->keybit);
__set_bit(BTN_MIDDLE, input_dev->keybit);
usb_set_intfdata(intf, synusb);
if (synusb->flags & SYNUSB_IO_ALWAYS) {
error = synusb_open(input_dev);
if (error)
goto err_free_dma;
}
error = input_register_device(input_dev);
if (error) {
dev_err(&udev->dev,
"Failed to register input device, error %d\n",
error);
goto err_stop_io;
}
return 0;
err_stop_io:
if (synusb->flags & SYNUSB_IO_ALWAYS)
synusb_close(synusb->input);
err_free_dma:
usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data,
synusb->urb->transfer_dma);
err_free_urb:
usb_free_urb(synusb->urb);
err_free_mem:
input_free_device(input_dev);
kfree(synusb);
usb_set_intfdata(intf, NULL);
return error;
}
static void synusb_disconnect(struct usb_interface *intf)
{
struct synusb *synusb = usb_get_intfdata(intf);
struct usb_device *udev = interface_to_usbdev(intf);
if (synusb->flags & SYNUSB_IO_ALWAYS)
synusb_close(synusb->input);
input_unregister_device(synusb->input);
usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data,
synusb->urb->transfer_dma);
usb_free_urb(synusb->urb);
kfree(synusb);
usb_set_intfdata(intf, NULL);
}
static int synusb_suspend(struct usb_interface *intf, pm_message_t message)
{
struct synusb *synusb = usb_get_intfdata(intf);
mutex_lock(&synusb->pm_mutex);
usb_kill_urb(synusb->urb);
mutex_unlock(&synusb->pm_mutex);
return 0;
}
static int synusb_resume(struct usb_interface *intf)
{
struct synusb *synusb = usb_get_intfdata(intf);
int retval = 0;
mutex_lock(&synusb->pm_mutex);
if ((synusb->is_open || (synusb->flags & SYNUSB_IO_ALWAYS)) &&
usb_submit_urb(synusb->urb, GFP_NOIO) < 0) {
retval = -EIO;
}
mutex_unlock(&synusb->pm_mutex);
return retval;
}
static int synusb_pre_reset(struct usb_interface *intf)
{
struct synusb *synusb = usb_get_intfdata(intf);
mutex_lock(&synusb->pm_mutex);
usb_kill_urb(synusb->urb);
return 0;
}
static int synusb_post_reset(struct usb_interface *intf)
{
struct synusb *synusb = usb_get_intfdata(intf);
int retval = 0;
if ((synusb->is_open || (synusb->flags & SYNUSB_IO_ALWAYS)) &&
usb_submit_urb(synusb->urb, GFP_NOIO) < 0) {
retval = -EIO;
}
mutex_unlock(&synusb->pm_mutex);
return retval;
}
static int synusb_reset_resume(struct usb_interface *intf)
{
return synusb_resume(intf);
}
static const struct usb_device_id synusb_idtable[] = {
{ USB_DEVICE_SYNAPTICS(TP, SYNUSB_TOUCHPAD) },
{ USB_DEVICE_SYNAPTICS(INT_TP, SYNUSB_TOUCHPAD) },
{ USB_DEVICE_SYNAPTICS(CPAD,
SYNUSB_TOUCHPAD | SYNUSB_AUXDISPLAY | SYNUSB_IO_ALWAYS) },
{ USB_DEVICE_SYNAPTICS(TS, SYNUSB_TOUCHSCREEN) },
{ USB_DEVICE_SYNAPTICS(STICK, SYNUSB_STICK) },
{ USB_DEVICE_SYNAPTICS(WP, SYNUSB_TOUCHPAD) },
{ USB_DEVICE_SYNAPTICS(COMP_TP, SYNUSB_COMBO) },
{ USB_DEVICE_SYNAPTICS(WTP, SYNUSB_TOUCHPAD) },
{ USB_DEVICE_SYNAPTICS(DPAD, SYNUSB_TOUCHPAD) },
{ }
};
MODULE_DEVICE_TABLE(usb, synusb_idtable);
static struct usb_driver synusb_driver = {
.name = "synaptics_usb",
.probe = synusb_probe,
.disconnect = synusb_disconnect,
.id_table = synusb_idtable,
.suspend = synusb_suspend,
.resume = synusb_resume,
.pre_reset = synusb_pre_reset,
.post_reset = synusb_post_reset,
.reset_resume = synusb_reset_resume,
.supports_autosuspend = 1,
};
module_usb_driver(synusb_driver);
MODULE_AUTHOR("Rob Miller <[email protected]>, "
"Ron Lee <[email protected]>, "
"Jan Steinhoff <[email protected]>");
MODULE_DESCRIPTION("Synaptics USB device driver");
MODULE_LICENSE("GPL");
|
linux-master
|
drivers/input/mouse/synaptics_usb.c
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Cypress Trackpad PS/2 mouse driver
*
* Copyright (c) 2012 Cypress Semiconductor Corporation.
*
* Author:
* Dudley Du <[email protected]>
*
* Additional contributors include:
* Kamal Mostafa <[email protected]>
* Kyle Fazzari <[email protected]>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/serio.h>
#include <linux/libps2.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include "cypress_ps2.h"
#undef CYTP_DEBUG_VERBOSE /* define this and DEBUG for more verbose dump */
static void cypress_set_packet_size(struct psmouse *psmouse, unsigned int n)
{
struct cytp_data *cytp = psmouse->private;
cytp->pkt_size = n;
}
static const unsigned char cytp_rate[] = {10, 20, 40, 60, 100, 200};
static const unsigned char cytp_resolution[] = {0x00, 0x01, 0x02, 0x03};
static int cypress_ps2_sendbyte(struct psmouse *psmouse, int value)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
if (ps2_sendbyte(ps2dev, value & 0xff, CYTP_CMD_TIMEOUT) < 0) {
psmouse_dbg(psmouse,
"sending command 0x%02x failed, resp 0x%02x\n",
value & 0xff, ps2dev->nak);
if (ps2dev->nak == CYTP_PS2_RETRY)
return CYTP_PS2_RETRY;
else
return CYTP_PS2_ERROR;
}
#ifdef CYTP_DEBUG_VERBOSE
psmouse_dbg(psmouse, "sending command 0x%02x succeeded, resp 0xfa\n",
value & 0xff);
#endif
return 0;
}
static int cypress_ps2_ext_cmd(struct psmouse *psmouse, unsigned short cmd,
unsigned char data)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
int tries = CYTP_PS2_CMD_TRIES;
int rc;
ps2_begin_command(ps2dev);
do {
/*
* Send extension command byte (0xE8 or 0xF3).
* If sending the command fails, send recovery command
* to make the device return to the ready state.
*/
rc = cypress_ps2_sendbyte(psmouse, cmd & 0xff);
if (rc == CYTP_PS2_RETRY) {
rc = cypress_ps2_sendbyte(psmouse, 0x00);
if (rc == CYTP_PS2_RETRY)
rc = cypress_ps2_sendbyte(psmouse, 0x0a);
}
if (rc == CYTP_PS2_ERROR)
continue;
rc = cypress_ps2_sendbyte(psmouse, data);
if (rc == CYTP_PS2_RETRY)
rc = cypress_ps2_sendbyte(psmouse, data);
if (rc == CYTP_PS2_ERROR)
continue;
else
break;
} while (--tries > 0);
ps2_end_command(ps2dev);
return rc;
}
static int cypress_ps2_read_cmd_status(struct psmouse *psmouse,
unsigned char cmd,
unsigned char *param)
{
int rc;
struct ps2dev *ps2dev = &psmouse->ps2dev;
enum psmouse_state old_state;
int pktsize;
ps2_begin_command(ps2dev);
old_state = psmouse->state;
psmouse->state = PSMOUSE_CMD_MODE;
psmouse->pktcnt = 0;
pktsize = (cmd == CYTP_CMD_READ_TP_METRICS) ? 8 : 3;
memset(param, 0, pktsize);
rc = cypress_ps2_sendbyte(psmouse, 0xe9);
if (rc < 0)
goto out;
wait_event_timeout(ps2dev->wait,
(psmouse->pktcnt >= pktsize),
msecs_to_jiffies(CYTP_CMD_TIMEOUT));
memcpy(param, psmouse->packet, pktsize);
psmouse_dbg(psmouse, "Command 0x%02x response data (0x): %*ph\n",
cmd, pktsize, param);
out:
psmouse->state = old_state;
psmouse->pktcnt = 0;
ps2_end_command(ps2dev);
return rc;
}
static bool cypress_verify_cmd_state(struct psmouse *psmouse,
unsigned char cmd, unsigned char *param)
{
bool rate_match = false;
bool resolution_match = false;
int i;
/* callers will do further checking. */
if (cmd == CYTP_CMD_READ_CYPRESS_ID ||
cmd == CYTP_CMD_STANDARD_MODE ||
cmd == CYTP_CMD_READ_TP_METRICS)
return true;
if ((~param[0] & DFLT_RESP_BITS_VALID) == DFLT_RESP_BITS_VALID &&
(param[0] & DFLT_RESP_BIT_MODE) == DFLT_RESP_STREAM_MODE) {
for (i = 0; i < sizeof(cytp_resolution); i++)
if (cytp_resolution[i] == param[1])
resolution_match = true;
for (i = 0; i < sizeof(cytp_rate); i++)
if (cytp_rate[i] == param[2])
rate_match = true;
if (resolution_match && rate_match)
return true;
}
psmouse_dbg(psmouse, "verify cmd state failed.\n");
return false;
}
static int cypress_send_ext_cmd(struct psmouse *psmouse, unsigned char cmd,
unsigned char *param)
{
int tries = CYTP_PS2_CMD_TRIES;
int rc;
psmouse_dbg(psmouse, "send extension cmd 0x%02x, [%d %d %d %d]\n",
cmd, DECODE_CMD_AA(cmd), DECODE_CMD_BB(cmd),
DECODE_CMD_CC(cmd), DECODE_CMD_DD(cmd));
do {
cypress_ps2_ext_cmd(psmouse,
PSMOUSE_CMD_SETRES, DECODE_CMD_DD(cmd));
cypress_ps2_ext_cmd(psmouse,
PSMOUSE_CMD_SETRES, DECODE_CMD_CC(cmd));
cypress_ps2_ext_cmd(psmouse,
PSMOUSE_CMD_SETRES, DECODE_CMD_BB(cmd));
cypress_ps2_ext_cmd(psmouse,
PSMOUSE_CMD_SETRES, DECODE_CMD_AA(cmd));
rc = cypress_ps2_read_cmd_status(psmouse, cmd, param);
if (rc)
continue;
if (cypress_verify_cmd_state(psmouse, cmd, param))
return 0;
} while (--tries > 0);
return -EIO;
}
int cypress_detect(struct psmouse *psmouse, bool set_properties)
{
unsigned char param[3];
if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param))
return -ENODEV;
/* Check for Cypress Trackpad signature bytes: 0x33 0xCC */
if (param[0] != 0x33 || param[1] != 0xCC)
return -ENODEV;
if (set_properties) {
psmouse->vendor = "Cypress";
psmouse->name = "Trackpad";
}
return 0;
}
static int cypress_read_fw_version(struct psmouse *psmouse)
{
struct cytp_data *cytp = psmouse->private;
unsigned char param[3];
if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param))
return -ENODEV;
/* Check for Cypress Trackpad signature bytes: 0x33 0xCC */
if (param[0] != 0x33 || param[1] != 0xCC)
return -ENODEV;
cytp->fw_version = param[2] & FW_VERSION_MASX;
cytp->tp_metrics_supported = (param[2] & TP_METRICS_MASK) ? 1 : 0;
/*
* Trackpad fw_version 11 (in Dell XPS12) yields a bogus response to
* CYTP_CMD_READ_TP_METRICS so do not try to use it. LP: #1103594.
*/
if (cytp->fw_version >= 11)
cytp->tp_metrics_supported = 0;
psmouse_dbg(psmouse, "cytp->fw_version = %d\n", cytp->fw_version);
psmouse_dbg(psmouse, "cytp->tp_metrics_supported = %d\n",
cytp->tp_metrics_supported);
return 0;
}
static int cypress_read_tp_metrics(struct psmouse *psmouse)
{
struct cytp_data *cytp = psmouse->private;
unsigned char param[8];
/* set default values for tp metrics. */
cytp->tp_width = CYTP_DEFAULT_WIDTH;
cytp->tp_high = CYTP_DEFAULT_HIGH;
cytp->tp_max_abs_x = CYTP_ABS_MAX_X;
cytp->tp_max_abs_y = CYTP_ABS_MAX_Y;
cytp->tp_min_pressure = CYTP_MIN_PRESSURE;
cytp->tp_max_pressure = CYTP_MAX_PRESSURE;
cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width;
cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high;
if (!cytp->tp_metrics_supported)
return 0;
memset(param, 0, sizeof(param));
if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_TP_METRICS, param) == 0) {
/* Update trackpad parameters. */
cytp->tp_max_abs_x = (param[1] << 8) | param[0];
cytp->tp_max_abs_y = (param[3] << 8) | param[2];
cytp->tp_min_pressure = param[4];
cytp->tp_max_pressure = param[5];
}
if (!cytp->tp_max_pressure ||
cytp->tp_max_pressure < cytp->tp_min_pressure ||
!cytp->tp_width || !cytp->tp_high ||
!cytp->tp_max_abs_x ||
cytp->tp_max_abs_x < cytp->tp_width ||
!cytp->tp_max_abs_y ||
cytp->tp_max_abs_y < cytp->tp_high)
return -EINVAL;
cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width;
cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high;
#ifdef CYTP_DEBUG_VERBOSE
psmouse_dbg(psmouse, "Dump trackpad hardware configuration as below:\n");
psmouse_dbg(psmouse, "cytp->tp_width = %d\n", cytp->tp_width);
psmouse_dbg(psmouse, "cytp->tp_high = %d\n", cytp->tp_high);
psmouse_dbg(psmouse, "cytp->tp_max_abs_x = %d\n", cytp->tp_max_abs_x);
psmouse_dbg(psmouse, "cytp->tp_max_abs_y = %d\n", cytp->tp_max_abs_y);
psmouse_dbg(psmouse, "cytp->tp_min_pressure = %d\n", cytp->tp_min_pressure);
psmouse_dbg(psmouse, "cytp->tp_max_pressure = %d\n", cytp->tp_max_pressure);
psmouse_dbg(psmouse, "cytp->tp_res_x = %d\n", cytp->tp_res_x);
psmouse_dbg(psmouse, "cytp->tp_res_y = %d\n", cytp->tp_res_y);
psmouse_dbg(psmouse, "tp_type_APA = %d\n",
(param[6] & TP_METRICS_BIT_APA) ? 1 : 0);
psmouse_dbg(psmouse, "tp_type_MTG = %d\n",
(param[6] & TP_METRICS_BIT_MTG) ? 1 : 0);
psmouse_dbg(psmouse, "tp_palm = %d\n",
(param[6] & TP_METRICS_BIT_PALM) ? 1 : 0);
psmouse_dbg(psmouse, "tp_stubborn = %d\n",
(param[6] & TP_METRICS_BIT_STUBBORN) ? 1 : 0);
psmouse_dbg(psmouse, "tp_1f_jitter = %d\n",
(param[6] & TP_METRICS_BIT_1F_JITTER) >> 2);
psmouse_dbg(psmouse, "tp_2f_jitter = %d\n",
(param[6] & TP_METRICS_BIT_2F_JITTER) >> 4);
psmouse_dbg(psmouse, "tp_1f_spike = %d\n",
param[7] & TP_METRICS_BIT_1F_SPIKE);
psmouse_dbg(psmouse, "tp_2f_spike = %d\n",
(param[7] & TP_METRICS_BIT_2F_SPIKE) >> 2);
psmouse_dbg(psmouse, "tp_abs_packet_format_set = %d\n",
(param[7] & TP_METRICS_BIT_ABS_PKT_FORMAT_SET) >> 4);
#endif
return 0;
}
static int cypress_query_hardware(struct psmouse *psmouse)
{
int ret;
ret = cypress_read_fw_version(psmouse);
if (ret)
return ret;
ret = cypress_read_tp_metrics(psmouse);
if (ret)
return ret;
return 0;
}
static int cypress_set_absolute_mode(struct psmouse *psmouse)
{
struct cytp_data *cytp = psmouse->private;
unsigned char param[3];
if (cypress_send_ext_cmd(psmouse, CYTP_CMD_ABS_WITH_PRESSURE_MODE, param) < 0)
return -1;
cytp->mode = (cytp->mode & ~CYTP_BIT_ABS_REL_MASK)
| CYTP_BIT_ABS_PRESSURE;
cypress_set_packet_size(psmouse, 5);
return 0;
}
/*
* Reset trackpad device.
* This is also the default mode when trackpad powered on.
*/
static void cypress_reset(struct psmouse *psmouse)
{
struct cytp_data *cytp = psmouse->private;
cytp->mode = 0;
psmouse_reset(psmouse);
}
static int cypress_set_input_params(struct input_dev *input,
struct cytp_data *cytp)
{
int ret;
if (!cytp->tp_res_x || !cytp->tp_res_y)
return -EINVAL;
__set_bit(EV_ABS, input->evbit);
input_set_abs_params(input, ABS_X, 0, cytp->tp_max_abs_x, 0, 0);
input_set_abs_params(input, ABS_Y, 0, cytp->tp_max_abs_y, 0, 0);
input_set_abs_params(input, ABS_PRESSURE,
cytp->tp_min_pressure, cytp->tp_max_pressure, 0, 0);
input_set_abs_params(input, ABS_TOOL_WIDTH, 0, 255, 0, 0);
/* finger position */
input_set_abs_params(input, ABS_MT_POSITION_X, 0, cytp->tp_max_abs_x, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cytp->tp_max_abs_y, 0, 0);
input_set_abs_params(input, ABS_MT_PRESSURE, 0, 255, 0, 0);
ret = input_mt_init_slots(input, CYTP_MAX_MT_SLOTS,
INPUT_MT_DROP_UNUSED|INPUT_MT_TRACK);
if (ret < 0)
return ret;
__set_bit(INPUT_PROP_SEMI_MT, input->propbit);
input_abs_set_res(input, ABS_X, cytp->tp_res_x);
input_abs_set_res(input, ABS_Y, cytp->tp_res_y);
input_abs_set_res(input, ABS_MT_POSITION_X, cytp->tp_res_x);
input_abs_set_res(input, ABS_MT_POSITION_Y, cytp->tp_res_y);
__set_bit(BTN_TOUCH, input->keybit);
__set_bit(BTN_TOOL_FINGER, input->keybit);
__set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
__set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
__set_bit(BTN_TOOL_QUADTAP, input->keybit);
__set_bit(BTN_TOOL_QUINTTAP, input->keybit);
__clear_bit(EV_REL, input->evbit);
__clear_bit(REL_X, input->relbit);
__clear_bit(REL_Y, input->relbit);
__set_bit(EV_KEY, input->evbit);
__set_bit(BTN_LEFT, input->keybit);
__set_bit(BTN_RIGHT, input->keybit);
__set_bit(BTN_MIDDLE, input->keybit);
return 0;
}
static int cypress_get_finger_count(unsigned char header_byte)
{
unsigned char bits6_7;
int finger_count;
bits6_7 = header_byte >> 6;
finger_count = bits6_7 & 0x03;
if (finger_count == 1)
return 1;
if (header_byte & ABS_HSCROLL_BIT) {
/* HSCROLL gets added on to 0 finger count. */
switch (finger_count) {
case 0: return 4;
case 2: return 5;
default:
/* Invalid contact (e.g. palm). Ignore it. */
return 0;
}
}
return finger_count;
}
static int cypress_parse_packet(struct psmouse *psmouse,
struct cytp_data *cytp, struct cytp_report_data *report_data)
{
unsigned char *packet = psmouse->packet;
unsigned char header_byte = packet[0];
memset(report_data, 0, sizeof(struct cytp_report_data));
report_data->contact_cnt = cypress_get_finger_count(header_byte);
report_data->tap = (header_byte & ABS_MULTIFINGER_TAP) ? 1 : 0;
if (report_data->contact_cnt == 1) {
report_data->contacts[0].x =
((packet[1] & 0x70) << 4) | packet[2];
report_data->contacts[0].y =
((packet[1] & 0x07) << 8) | packet[3];
if (cytp->mode & CYTP_BIT_ABS_PRESSURE)
report_data->contacts[0].z = packet[4];
} else if (report_data->contact_cnt >= 2) {
report_data->contacts[0].x =
((packet[1] & 0x70) << 4) | packet[2];
report_data->contacts[0].y =
((packet[1] & 0x07) << 8) | packet[3];
if (cytp->mode & CYTP_BIT_ABS_PRESSURE)
report_data->contacts[0].z = packet[4];
report_data->contacts[1].x =
((packet[5] & 0xf0) << 4) | packet[6];
report_data->contacts[1].y =
((packet[5] & 0x0f) << 8) | packet[7];
if (cytp->mode & CYTP_BIT_ABS_PRESSURE)
report_data->contacts[1].z = report_data->contacts[0].z;
}
report_data->left = (header_byte & BTN_LEFT_BIT) ? 1 : 0;
report_data->right = (header_byte & BTN_RIGHT_BIT) ? 1 : 0;
/*
* This is only true if one of the mouse buttons were tapped. Make
* sure it doesn't turn into a click. The regular tap-to-click
* functionality will handle that on its own. If we don't do this,
* disabling tap-to-click won't affect the mouse button zones.
*/
if (report_data->tap)
report_data->left = 0;
#ifdef CYTP_DEBUG_VERBOSE
{
int i;
int n = report_data->contact_cnt;
psmouse_dbg(psmouse, "Dump parsed report data as below:\n");
psmouse_dbg(psmouse, "contact_cnt = %d\n",
report_data->contact_cnt);
if (n > CYTP_MAX_MT_SLOTS)
n = CYTP_MAX_MT_SLOTS;
for (i = 0; i < n; i++)
psmouse_dbg(psmouse, "contacts[%d] = {%d, %d, %d}\n", i,
report_data->contacts[i].x,
report_data->contacts[i].y,
report_data->contacts[i].z);
psmouse_dbg(psmouse, "left = %d\n", report_data->left);
psmouse_dbg(psmouse, "right = %d\n", report_data->right);
psmouse_dbg(psmouse, "middle = %d\n", report_data->middle);
}
#endif
return 0;
}
static void cypress_process_packet(struct psmouse *psmouse, bool zero_pkt)
{
int i;
struct input_dev *input = psmouse->dev;
struct cytp_data *cytp = psmouse->private;
struct cytp_report_data report_data;
struct cytp_contact *contact;
struct input_mt_pos pos[CYTP_MAX_MT_SLOTS];
int slots[CYTP_MAX_MT_SLOTS];
int n;
cypress_parse_packet(psmouse, cytp, &report_data);
n = report_data.contact_cnt;
if (n > CYTP_MAX_MT_SLOTS)
n = CYTP_MAX_MT_SLOTS;
for (i = 0; i < n; i++) {
contact = &report_data.contacts[i];
pos[i].x = contact->x;
pos[i].y = contact->y;
}
input_mt_assign_slots(input, slots, pos, n, 0);
for (i = 0; i < n; i++) {
contact = &report_data.contacts[i];
input_mt_slot(input, slots[i]);
input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
input_report_abs(input, ABS_MT_POSITION_X, contact->x);
input_report_abs(input, ABS_MT_POSITION_Y, contact->y);
input_report_abs(input, ABS_MT_PRESSURE, contact->z);
}
input_mt_sync_frame(input);
input_mt_report_finger_count(input, report_data.contact_cnt);
input_report_key(input, BTN_LEFT, report_data.left);
input_report_key(input, BTN_RIGHT, report_data.right);
input_report_key(input, BTN_MIDDLE, report_data.middle);
input_sync(input);
}
static psmouse_ret_t cypress_validate_byte(struct psmouse *psmouse)
{
int contact_cnt;
int index = psmouse->pktcnt - 1;
unsigned char *packet = psmouse->packet;
struct cytp_data *cytp = psmouse->private;
if (index < 0 || index > cytp->pkt_size)
return PSMOUSE_BAD_DATA;
if (index == 0 && (packet[0] & 0xfc) == 0) {
/* call packet process for reporting finger leave. */
cypress_process_packet(psmouse, 1);
return PSMOUSE_FULL_PACKET;
}
/*
* Perform validation (and adjust packet size) based only on the
* first byte; allow all further bytes through.
*/
if (index != 0)
return PSMOUSE_GOOD_DATA;
/*
* If absolute/relative mode bit has not been set yet, just pass
* the byte through.
*/
if ((cytp->mode & CYTP_BIT_ABS_REL_MASK) == 0)
return PSMOUSE_GOOD_DATA;
if ((packet[0] & 0x08) == 0x08)
return PSMOUSE_BAD_DATA;
contact_cnt = cypress_get_finger_count(packet[0]);
if (cytp->mode & CYTP_BIT_ABS_NO_PRESSURE)
cypress_set_packet_size(psmouse, contact_cnt == 2 ? 7 : 4);
else
cypress_set_packet_size(psmouse, contact_cnt == 2 ? 8 : 5);
return PSMOUSE_GOOD_DATA;
}
static psmouse_ret_t cypress_protocol_handler(struct psmouse *psmouse)
{
struct cytp_data *cytp = psmouse->private;
if (psmouse->pktcnt >= cytp->pkt_size) {
cypress_process_packet(psmouse, 0);
return PSMOUSE_FULL_PACKET;
}
return cypress_validate_byte(psmouse);
}
static void cypress_set_rate(struct psmouse *psmouse, unsigned int rate)
{
struct cytp_data *cytp = psmouse->private;
if (rate >= 80) {
psmouse->rate = 80;
cytp->mode |= CYTP_BIT_HIGH_RATE;
} else {
psmouse->rate = 40;
cytp->mode &= ~CYTP_BIT_HIGH_RATE;
}
ps2_command(&psmouse->ps2dev, (unsigned char *)&psmouse->rate,
PSMOUSE_CMD_SETRATE);
}
static void cypress_disconnect(struct psmouse *psmouse)
{
cypress_reset(psmouse);
kfree(psmouse->private);
psmouse->private = NULL;
}
static int cypress_reconnect(struct psmouse *psmouse)
{
int tries = CYTP_PS2_CMD_TRIES;
int rc;
do {
cypress_reset(psmouse);
rc = cypress_detect(psmouse, false);
} while (rc && (--tries > 0));
if (rc) {
psmouse_err(psmouse, "Reconnect: unable to detect trackpad.\n");
return -1;
}
if (cypress_set_absolute_mode(psmouse)) {
psmouse_err(psmouse, "Reconnect: Unable to initialize Cypress absolute mode.\n");
return -1;
}
return 0;
}
int cypress_init(struct psmouse *psmouse)
{
struct cytp_data *cytp;
cytp = kzalloc(sizeof(struct cytp_data), GFP_KERNEL);
if (!cytp)
return -ENOMEM;
psmouse->private = cytp;
psmouse->pktsize = 8;
cypress_reset(psmouse);
if (cypress_query_hardware(psmouse)) {
psmouse_err(psmouse, "Unable to query Trackpad hardware.\n");
goto err_exit;
}
if (cypress_set_absolute_mode(psmouse)) {
psmouse_err(psmouse, "init: Unable to initialize Cypress absolute mode.\n");
goto err_exit;
}
if (cypress_set_input_params(psmouse->dev, cytp) < 0) {
psmouse_err(psmouse, "init: Unable to set input params.\n");
goto err_exit;
}
psmouse->model = 1;
psmouse->protocol_handler = cypress_protocol_handler;
psmouse->set_rate = cypress_set_rate;
psmouse->disconnect = cypress_disconnect;
psmouse->reconnect = cypress_reconnect;
psmouse->cleanup = cypress_reset;
psmouse->resync_time = 0;
return 0;
err_exit:
/*
* Reset Cypress Trackpad as a standard mouse. Then
* let psmouse driver communicating with it as default PS2 mouse.
*/
cypress_reset(psmouse);
psmouse->private = NULL;
kfree(cytp);
return -1;
}
|
linux-master
|
drivers/input/mouse/cypress_ps2.c
|
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.