text: /* Copyright 2017 The Chromium OS Authors. All rights reserved.
   * Use of this source code is governed by a BSD-style license that can be
   * found in the LICENSE file.
   */
  
  #include "adc.h"
  #include "adc_chip.h"
  #include "backlight.h"
  #include "button.h"
  #include "chipset.h"
  #include "charge_manager.h"
  #include "charge_state.h"
  #include "common.h"
  #include "console.h"
  #include "ec_commands.h"
  #include "driver/accelgyro_bmi160.h"
  #include "driver/baro_bmp280.h"
  #include "driver/tcpm/fusb302.h"
  #include "driver/temp_sensor/tmp432.h"
  #include "extpower.h"
  #include "gpio.h"
  #include "hooks.h"
  #include "host_command.h"
  #include "i2c.h"
  #include "power.h"
  #include "power_button.h"
  #include "pwm.h"
  #include "pwm_chip.h"
  #include "registers.h"
  #include "spi.h"
  #include "switch.h"
  #include "system.h"
  #include "task.h"
  #include "tcpm.h"
  #include "temp_sensor.h"
  #include "temp_sensor_chip.h"
  #include "timer.h"
  #include "thermal.h"
  #include "usb_charge.h"
  #include "usb_mux.h"
  #include "usb_pd_tcpm.h"
  #include "util.h"
  
  #define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args)
  #define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args)
  
  static void tcpc_alert_event(enum gpio_signal signal)
  {
  	schedule_deferred_pd_interrupt(0 /* port */);
  }
  
  static void overtemp_interrupt(enum gpio_signal signal)
  {
  	CPRINTS("AP wants shutdown");
  	chipset_force_shutdown(CHIPSET_SHUTDOWN_THERMAL);
  }
  
  static void warm_reset_request_interrupt(enum gpio_signal signal)
  {
  	CPRINTS("AP wants warm reset");
  	chipset_reset(CHIPSET_RESET_AP_REQ);
  }
  
  #include "gpio_list.h"
  
  /******************************************************************************/
  /* ADC channels. Must be in the exactly same order as in enum adc_channel. */
  const struct adc_t adc_channels[] = {
  	[ADC_BOARD_ID] = {"BOARD_ID", 16, 4096, 0, STM32_AIN(10)},
  };
  BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT);
  
  /******************************************************************************/
  /* I2C ports */
  const struct i2c_port_t i2c_ports[] = {
  	{"tcpc0",   I2C_PORT_TCPC0,     1000, GPIO_I2C1_SCL, GPIO_I2C1_SDA},
  };
  const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports);
  
  /* power signal list.  Must match order of enum power_signal. */
  const struct power_signal_info power_signal_list[] = {
  	{GPIO_PP1250_S3_PG,    POWER_SIGNAL_ACTIVE_HIGH, "PP1250_S3_PWR_GOOD"},
  	{GPIO_PP900_S0_PG,     POWER_SIGNAL_ACTIVE_HIGH, "PP900_S0_PWR_GOOD"},
  	{GPIO_AP_CORE_PG,      POWER_SIGNAL_ACTIVE_HIGH, "AP_PWR_GOOD"},
  	{GPIO_AP_EC_S3_S0_L,   POWER_SIGNAL_ACTIVE_LOW, "SUSPEND_DEASSERTED"},
  };
  BUILD_ASSERT(ARRAY_SIZE(power_signal_list) == POWER_SIGNAL_COUNT);
  
  #ifdef CONFIG_TEMP_SENSOR_TMP432
  /* Temperature sensors data; must be in same order as enum temp_sensor_id. */
  const struct temp_sensor_t temp_sensors[] = {
  	{"TMP432_Internal", TEMP_SENSOR_TYPE_BOARD, tmp432_get_val,
  		TMP432_IDX_LOCAL, 4},
  	{"TMP432_Sensor_1", TEMP_SENSOR_TYPE_BOARD, tmp432_get_val,
  		TMP432_IDX_REMOTE1, 4},
  	{"TMP432_Sensor_2", TEMP_SENSOR_TYPE_BOARD, tmp432_get_val,
  		TMP432_IDX_REMOTE2, 4},
  };
  BUILD_ASSERT(ARRAY_SIZE(temp_sensors) == TEMP_SENSOR_COUNT);
  
  /*
   * Thermal limits for each temp sensor. All temps are in degrees K. Must be in
   * same order as enum temp_sensor_id. To always ignore any temp, use 0.
   */
  struct ec_thermal_config thermal_params[] = {
  	{{0, 0, 0}, 0, 0}, /* TMP432_Internal */
  	{{0, 0, 0}, 0, 0}, /* TMP432_Sensor_1 */
  	{{0, 0, 0}, 0, 0}, /* TMP432_Sensor_2 */
  };
  BUILD_ASSERT(ARRAY_SIZE(thermal_params) == TEMP_SENSOR_COUNT);
  #endif
  
  /******************************************************************************/
  /* SPI devices */
  const struct spi_device_t spi_devices[] = {
  	{ CONFIG_SPI_ACCEL_PORT, 1, GPIO_SPI_ACCEL_CS_L },
  	{ CONFIG_SPI_ACCEL_PORT, 1, GPIO_SPI_BARO_CS_L },
  };
  const unsigned int spi_devices_used = ARRAY_SIZE(spi_devices);
  
  /******************************************************************************/
  /* Wake-up pins for hibernate */
  const enum gpio_signal hibernate_wake_pins[] = {
  	GPIO_POWER_BUTTON_L, GPIO_CHARGER_INT_L
  };
  const int hibernate_wake_pins_used = ARRAY_SIZE(hibernate_wake_pins);
  
  /******************************************************************************/
  const struct tcpc_config_t tcpc_config[CONFIG_USB_PD_PORT_COUNT] = {
  	{I2C_PORT_TCPC0, FUSB302_I2C_SLAVE_ADDR, &fusb302_tcpm_drv},
  };
  
  struct usb_mux usb_muxes[CONFIG_USB_PD_PORT_COUNT] = {
  	{
  		.driver = &virtual_usb_mux_driver,
  		.hpd_update = &virtual_hpd_update,
  	},
  };
  
  void board_reset_pd_mcu(void)
  {
  }
  
  uint16_t tcpc_get_alert_status(void)
  {
  	uint16_t status = 0;
  
  	if (!gpio_get_level(GPIO_USB_C0_PD_INT_L))
  		status |= PD_STATUS_TCPC_ALERT_0;
  
  	return status;
  }
  
  int board_set_active_charge_port(int charge_port)
  {
  	/*
  	 * NOP because there is no internal power therefore no charging.
  	 * Placeholder so common/charge_manager.c is built.
  	 */
  	return EC_SUCCESS;
  }
  
  void board_set_charge_limit(int port, int supplier, int charge_ma,
  			     int max_ma, int charge_mv)
  {
  	/*
  	 * NOP because there is no internal power therefore no charging.
  	 * Placeholder so common/charge_manager.c is built.
  	 */
  }
  
  int extpower_is_present(void)
  {
  	/* There is no internal power on this board. */
  	return 1;
  }
  
  int pd_snk_is_vbus_provided(int port)
  {
    /* Must be, if we're at a stage where this function is called. */
  	return 1;
  }
  
  static void board_spi_enable(void)
  {
  	gpio_config_module(MODULE_SPI_MASTER, 1);
  
  	/* Enable clocks to SPI2 module */
  	STM32_RCC_APB1ENR |= STM32_RCC_PB1_SPI2;
  
  	/* Reset SPI2 */
  	STM32_RCC_APB1RSTR |= STM32_RCC_PB1_SPI2;
  	STM32_RCC_APB1RSTR &= ~STM32_RCC_PB1_SPI2;
  
  	spi_enable(CONFIG_SPI_ACCEL_PORT, 1);
  }
  DECLARE_HOOK(HOOK_CHIPSET_STARTUP,
  	     board_spi_enable,
  	     MOTION_SENSE_HOOK_PRIO - 1);
  
  static void board_spi_disable(void)
  {
  	spi_enable(CONFIG_SPI_ACCEL_PORT, 0);
  
  	/* Disable clocks to SPI2 module */
  	STM32_RCC_APB1ENR &= ~STM32_RCC_PB1_SPI2;
  
  	gpio_config_module(MODULE_SPI_MASTER, 0);
  }
  DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN,
  		 board_spi_disable,
  		 MOTION_SENSE_HOOK_PRIO + 1);
  
  static void board_init(void)
  {
  	/* Enable TCPC alert interrupts */
  	gpio_enable_interrupt(GPIO_USB_C0_PD_INT_L);
  
  	/* Enable reboot / shutdown control inputs from AP */
  	gpio_enable_interrupt(GPIO_WARM_RESET_REQ);
  	gpio_enable_interrupt(GPIO_AP_OVERTEMP);
  
  	/* Enable interrupts from BMI160 sensor. */
  	gpio_enable_interrupt(GPIO_ACCEL_INT_L);
  
  	/* Set SPI2 pins to high speed */
  	/* pins D0/D1/D3/D4 */
  	STM32_GPIO_OSPEEDR(GPIO_D) |= 0x000003cf;
  
  	/* Sensor Init */
  	if (system_jumped_to_this_image() && chipset_in_state(CHIPSET_STATE_ON))
  		board_spi_enable();
  }
  DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
  
  void board_config_pre_init(void)
  {
  	STM32_RCC_AHBENR |= STM32_RCC_HB_DMA1;
  	/*
  	 * Remap USART1 and SPI2 DMA:
  	 *
  	 * Ch4: USART1_TX / Ch5: USART1_RX (1000)
  	 * Ch6: SPI2_RX / Ch7: SPI2_TX (0011)
  	 */
  	STM32_DMA_CSELR(STM32_DMAC_CH4) = (8 << 12) | (8 << 16) |
  					  (3 << 20) | (3 << 24);
  }
  
  void board_hibernate(void)
  {
  	int rv;
  
  	/*
  	 * Disable the power enables for the TCPCs since we're going into
  	 * hibernate.  The charger VBUS interrupt will wake us up and reset the
  	 * EC.  Upon init, we'll reinitialize the TCPCs to be at full power.
  	 */
  	CPRINTS("Set TCPCs to low power");
  	rv = tcpc_write(0, TCPC_REG_POWER, TCPC_REG_POWER_PWR_LOW);
  	if (rv)
  		CPRINTS("Error setting TCPC %d", 0);
  
  	cflush();
  }
  
  enum rainier_board_version {
  	BOARD_VERSION_UNKNOWN = -1,
  	BOARD_VERSION_REV0 = 0,
  	BOARD_VERSION_REV1 = 1,
  	BOARD_VERSION_REV2 = 2,
  	BOARD_VERSION_REV3 = 3,
  	BOARD_VERSION_REV4 = 4,
  	BOARD_VERSION_REV5 = 5,
  	BOARD_VERSION_REV6 = 6,
  	BOARD_VERSION_REV7 = 7,
  	BOARD_VERSION_REV8 = 8,
  	BOARD_VERSION_REV9 = 9,
  	BOARD_VERSION_REV10 = 10,
  	BOARD_VERSION_REV11 = 11,
  	BOARD_VERSION_REV12 = 12,
  	BOARD_VERSION_REV13 = 13,
  	BOARD_VERSION_REV14 = 14,
  	BOARD_VERSION_REV15 = 15,
  	BOARD_VERSION_COUNT,
  };
  
  struct {
  	enum rainier_board_version version;
  	int expect_mv;
  } const rainier_boards[] = {
  	{ BOARD_VERSION_REV0, 109 },   /* 51.1K , 2.2K(gru 3.3K) ohm */
  	{ BOARD_VERSION_REV1, 211 },   /* 51.1k , 6.8K ohm */
  	{ BOARD_VERSION_REV2, 319 },   /* 51.1K , 11K ohm */
  	{ BOARD_VERSION_REV3, 427 },   /* 56K   , 17.4K ohm */
  	{ BOARD_VERSION_REV4, 542 },   /* 51.1K , 22K ohm */
  	{ BOARD_VERSION_REV5, 666 },   /* 51.1K , 30K ohm */
  	{ BOARD_VERSION_REV6, 781 },   /* 51.1K , 39.2K ohm */
  	{ BOARD_VERSION_REV7, 900 },   /* 56K   , 56K ohm */
  	{ BOARD_VERSION_REV8, 1023 },  /* 47K   , 61.9K ohm */
  	{ BOARD_VERSION_REV9, 1137 },  /* 47K   , 80.6K ohm */
  	{ BOARD_VERSION_REV10, 1240 }, /* 56K   , 124K ohm */
  	{ BOARD_VERSION_REV11, 1343 }, /* 51.1K , 150K ohm */
  	{ BOARD_VERSION_REV12, 1457 }, /* 47K   , 200K ohm */
  	{ BOARD_VERSION_REV13, 1576 }, /* 47K   , 330K ohm */
  	{ BOARD_VERSION_REV14, 1684 }, /* 47K   , 680K ohm */
  	{ BOARD_VERSION_REV15, 1800 }, /* 56K   , NC */
  };
  BUILD_ASSERT(ARRAY_SIZE(rainier_boards) == BOARD_VERSION_COUNT);
  
  #define THRESHOLD_MV 56 /* Simply assume 1800/16/2 */
  
  int board_get_version(void)
  {
  	static int version = BOARD_VERSION_UNKNOWN;
  	int mv;
  	int i;
  
  	if (version != BOARD_VERSION_UNKNOWN)
  		return version;
  
  	gpio_set_level(GPIO_EC_BOARD_ID_EN_L, 0);
  	/* Wait to allow cap charge */
  	msleep(10);
  	mv = adc_read_channel(ADC_BOARD_ID);
  
  	if (mv == ADC_READ_ERROR)
  		mv = adc_read_channel(ADC_BOARD_ID);
  
  	gpio_set_level(GPIO_EC_BOARD_ID_EN_L, 1);
  
  	for (i = 0; i < BOARD_VERSION_COUNT; ++i) {
  		if (mv < rainier_boards[i].expect_mv + THRESHOLD_MV) {
  			version = rainier_boards[i].version;
  			break;
  		}
  	}
  
  	return version;
  }
  
  /* Motion sensors */
  #ifdef HAS_TASK_MOTIONSENSE
  /* Mutexes */
  static struct mutex g_base_mutex;
  
  static struct bmi160_drv_data_t g_bmi160_data;
  
  /* Matrix to rotate accelerometer into standard reference frame */
  const mat33_fp_t base_standard_ref = {
  	{ 0, FLOAT_TO_FP(1),  0},
  	{ FLOAT_TO_FP(-1), 0,  0},
  	{ 0,  0, FLOAT_TO_FP(1)}
  };
  
  static struct bmp280_drv_data_t bmp280_drv_data;
  
  struct motion_sensor_t motion_sensors[] = {
  	/*
  	 * Note: bmi160: supports accelerometer and gyro sensor
  	 * Requirement: accelerometer sensor must init before gyro sensor
  	 * DO NOT change the order of the following table.
  	 */
  	[LID_ACCEL] = {
  	 .name = "Accel",
  	 .active_mask = SENSOR_ACTIVE_S0_S3,
  	 .chip = MOTIONSENSE_CHIP_BMI160,
  	 .type = MOTIONSENSE_TYPE_ACCEL,
  	 .location = MOTIONSENSE_LOC_LID,
  	 .drv = &bmi160_drv,
  	 .mutex = &g_base_mutex,
  	 .drv_data = &g_bmi160_data,
  	 .port = CONFIG_SPI_ACCEL_PORT,
  	 .addr = BMI160_SET_SPI_ADDRESS(CONFIG_SPI_ACCEL_PORT),
  	 .rot_standard_ref = &base_standard_ref,
  	 .default_range = 2,  /* g, enough for laptop. */
  	 .min_frequency = BMI160_ACCEL_MIN_FREQ,
  	 .max_frequency = BMI160_ACCEL_MAX_FREQ,
  	 .config = {
  		 /* Enable accel in S0 */
  		 [SENSOR_CONFIG_EC_S0] = {
  			 .odr = 10000 | ROUND_UP_FLAG,
  			 .ec_rate = 100 * MSEC,
  		 },
  	 },
  	},
  	[LID_GYRO] = {
  	 .name = "Gyro",
  	 .active_mask = SENSOR_ACTIVE_S0_S3,
  	 .chip = MOTIONSENSE_CHIP_BMI160,
  	 .type = MOTIONSENSE_TYPE_GYRO,
  	 .location = MOTIONSENSE_LOC_LID,
  	 .drv = &bmi160_drv,
  	 .mutex = &g_base_mutex,
  	 .drv_data = &g_bmi160_data,
  	 .port = CONFIG_SPI_ACCEL_PORT,
  	 .addr = BMI160_SET_SPI_ADDRESS(CONFIG_SPI_ACCEL_PORT),
  	 .default_range = 1000, /* dps */
  	 .rot_standard_ref = &base_standard_ref,
  	 .min_frequency = BMI160_GYRO_MIN_FREQ,
  	 .max_frequency = BMI160_GYRO_MAX_FREQ,
  	 .config = {
  		 /* Enable gyro in S0 */
  		 [SENSOR_CONFIG_EC_S0] = {
  			 .odr = 10000 | ROUND_UP_FLAG,
  			 .ec_rate = 100 * MSEC,
  		 },
  	 },
  	},
  	[LID_BARO] = {
  	 .name = "Baro",
  	 .active_mask = SENSOR_ACTIVE_S0_S3,
  	 .chip = MOTIONSENSE_CHIP_BMP280,
  	 .type = MOTIONSENSE_TYPE_BARO,
  	 .location = MOTIONSENSE_LOC_LID,
  	 .drv = &bmp280_drv,
  	 .drv_data = &bmp280_drv_data,
  	 .port = CONFIG_SPI_ACCEL_PORT,
  	 .addr = BMI160_SET_SPI_ADDRESS(CONFIG_SPI_ACCEL_PORT),
  	 .default_range = 1 << 18, /*  1bit = 4 Pa, 16bit ~= 2600 hPa */
  	 .min_frequency = BMP280_BARO_MIN_FREQ,
  	 .max_frequency = BMP280_BARO_MAX_FREQ,
  	},
  };
  const unsigned int motion_sensor_count = ARRAY_SIZE(motion_sensors);
  #endif /* defined(HAS_TASK_MOTIONSENSE) */
  
  int board_allow_i2c_passthru(int port)
  {
  	/*
  	 * Battery port is the only port passthru is allowed on and this board
  	 * does not have a battery, therefore always return false.
  	 */
  	return 0;
  }
  
  int charge_want_shutdown(void)
  {
  	/*
  	 * power/rk3399.c assumes there is internal power. Therefore this stub
  	 * returns false to prevent arbitrary shutdown.
  	 */
  	return 0;
  }
  
  int charge_prevent_power_on(int power_button_pressed)
  {
  	/* Assume there is always sufficient power from charger to power on. */
  	return 0;
  }
  