text: /* Copyright 2016 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.
   */
  
  /* Oak board configuration */
  
  #include "adc.h"
  #include "adc_chip.h"
  #include "als.h"
  #include "atomic.h"
  #include "battery.h"
  #include "button.h"
  #include "charge_manager.h"
  #include "charge_state.h"
  #include "charger.h"
  #include "chipset.h"
  #include "common.h"
  #include "console.h"
  #include "driver/accelgyro_bmi160.h"
  #include "driver/als_isl29035.h"
  #include "driver/tcpm/anx7688.h"
  #include "driver/tcpm/tcpci.h"
  #include "driver/temp_sensor/tmp432.h"
  #include "extpower.h"
  #include "gpio.h"
  #include "hooks.h"
  #include "host_command.h"
  #include "i2c.h"
  #include "keyboard_raw.h"
  #include "keyboard_scan.h"
  #include "lid_switch.h"
  #include "math_util.h"
  #include "motion_lid.h"
  #include "motion_sense.h"
  #include "pi3usb9281.h"
  #include "power.h"
  #include "power_button.h"
  #include "registers.h"
  #include "spi.h"
  #include "switch.h"
  #include "system.h"
  #include "task.h"
  #include "temp_sensor.h"
  #include "temp_sensor_chip.h"
  #include "thermal.h"
  #include "timer.h"
  #include "usb_charge.h"
  #include "usb_mux.h"
  #include "usb_pd.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)
  
  /* Dispaly port hardware can connect to port 0, 1 or neither. */
  #define PD_PORT_NONE -1
  
  void pd_mcu_interrupt(enum gpio_signal signal)
  {
  #ifdef HAS_TASK_PDCMD
  	/* Exchange status with PD MCU to determine interrupt cause */
  	host_command_pd_send_status(0);
  #endif
  }
  
  void deferred_reset_pd_mcu(void);
  DECLARE_DEFERRED(deferred_reset_pd_mcu);
  
  void usb_evt(enum gpio_signal signal)
  {
  	if (!gpio_get_level(GPIO_BC12_WAKE_L))
  		task_set_event(TASK_ID_USB_CHG_P0, USB_CHG_EVENT_BC12, 0);
  }
  
  #include "gpio_list.h"
  
  /* power signal list.  Must match order of enum power_signal. */
  const struct power_signal_info power_signal_list[] = {
  	{GPIO_SOC_POWER_GOOD, POWER_SIGNAL_ACTIVE_HIGH, "POWER_GOOD"},
  	{GPIO_SUSPEND_L, POWER_SIGNAL_ACTIVE_LOW, "SUSPEND#_ASSERTED"},
  };
  BUILD_ASSERT(ARRAY_SIZE(power_signal_list) == POWER_SIGNAL_COUNT);
  
  /* ADC channels */
  const struct adc_t adc_channels[] = {
  	/*
  	 * PSYS_MONITOR(PA2): ADC_IN2, 1.44 uA/W on 6.05k Ohm
  	 * output in mW
  	 */
  	[ADC_PSYS] = {"PSYS", 379415, 4096, 0, STM32_AIN(2)},
  	/* AMON_BMON(PC0): ADC_IN10, output in uV */
  	[ADC_AMON_BMON] = {"AMON_BMON", 183333, 4096, 0, STM32_AIN(10)},
  	/* VDC_BOOSTIN_SENSE(PC1): ADC_IN11, output in mV */
  	[ADC_VBUS] = {"VBUS", 33000, 4096, 0, STM32_AIN(11)},
  };
  BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT);
  
  int anx7688_passthru_allowed(const struct i2c_port_t *port, uint16_t address)
  {
  	/* Allow access to 0x2c (TCPC) */
  	if (address == 0x2c)
  		return 1;
  
  	CPRINTF("Passthru rejected on %x", address);
  
  	return 0;
  }
  
  /* I2C ports */
  const struct i2c_port_t i2c_ports[] = {
  	{"battery", I2C_PORT_BATTERY, 100,  GPIO_I2C0_SCL, GPIO_I2C0_SDA},
  	{"pd",      I2C_PORT_PD_MCU,  1000, GPIO_I2C1_SCL, GPIO_I2C1_SDA,
  		anx7688_passthru_allowed}
  };
  
  const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports);
  
  /* SPI devices */
  const struct spi_device_t spi_devices[] = {
  	{ CONFIG_SPI_ACCEL_PORT, 2, GPIO_SPI2_NSS },
  };
  const unsigned int spi_devices_used = ARRAY_SIZE(spi_devices);
  
  /* TCPC */
  const struct tcpc_config_t tcpc_config[CONFIG_USB_PD_PORT_COUNT] = {
  	{I2C_PORT_TCPC, CONFIG_TCPC_I2C_BASE_ADDR, &anx7688_tcpm_drv},
  };
  
  struct pi3usb9281_config pi3usb9281_chips[] = {
  	{
  		.i2c_port = I2C_PORT_PERICOM,
  		.mux_lock = NULL,
  	},
  };
  BUILD_ASSERT(ARRAY_SIZE(pi3usb9281_chips) ==
  	     CONFIG_BC12_DETECT_PI3USB9281_CHIP_COUNT);
  
  /*
   * Temperature sensors data; must be in same order as enum temp_sensor_id.
   * Sensor index and name must match those present in coreboot:
   *     src/mainboard/google/${board}/acpi/dptf.asl
   */
  const struct temp_sensor_t temp_sensors[] = {
  #ifdef CONFIG_TEMP_SENSOR_TMP432
  	{"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},
  #endif
  	{"Battery", TEMP_SENSOR_TYPE_BATTERY, charge_get_battery_temp,
  		0, 4},
  };
  BUILD_ASSERT(ARRAY_SIZE(temp_sensors) == TEMP_SENSOR_COUNT);
  
  const struct button_config *recovery_buttons[] = {
  	&buttons[BUTTON_VOLUME_DOWN],
  	&buttons[BUTTON_VOLUME_UP],
  };
  const int recovery_buttons_count = ARRAY_SIZE(recovery_buttons);
  
  struct usb_mux usb_muxes[CONFIG_USB_PD_PORT_COUNT] = {
  	{
  		.port_addr = 0, /* port idx */
  		.driver    = &anx7688_usb_mux_driver,
  	},
  };
  
  /**
   * Reset PD MCU
   *   ANX7688 needs a reset pulse of 50ms after power enable.
   */
  void deferred_reset_pd_mcu(void)
  {
  	uint8_t state = gpio_get_level(GPIO_USB_C0_PWR_EN_L) |
  			(gpio_get_level(GPIO_USB_C0_RST) << 1);
  
  	CPRINTS("%s %d", __func__, state);
  	switch (state) {
  	case 0:
  		/*
  		 * PWR_EN_L low, RST low
  		 * start reset sequence by turning off power enable
  		 * and wait for 1ms.
  		 */
  		gpio_set_level(GPIO_USB_C0_PWR_EN_L, 1);
  		hook_call_deferred(&deferred_reset_pd_mcu_data, 1*MSEC);
  		break;
  	case 1:
  		/*
  		 * PWR_EN_L high, RST low
  		 * pull PD reset pin and wait for another 1ms
  		 */
  		gpio_set_level(GPIO_USB_C0_RST, 1);
  		hook_call_deferred(&deferred_reset_pd_mcu_data, 1*MSEC);
  		/* on PD reset, trigger PD task to reset state */
  		task_set_event(TASK_ID_PD_C0, PD_EVENT_TCPC_RESET, 0);
  		break;
  	case 3:
  		/*
  		 * PWR_EN_L high, RST high
  		 * enable power and wait for 10ms then pull RESET_N
  		 */
  		gpio_set_level(GPIO_USB_C0_PWR_EN_L, 0);
  		hook_call_deferred(&deferred_reset_pd_mcu_data, 10*MSEC);
  		break;
  	case 2:
  		/*
  		 * PWR_EN_L low, RST high
  		 * leave reset state
  		 */
  		gpio_set_level(GPIO_USB_C0_RST, 0);
  		break;
  	}
  }
  
  static void board_power_on_pd_mcu(void)
  {
  	/* check if power is already on */
  	if (!gpio_get_level(GPIO_USB_C0_PWR_EN_L))
  		return;
  
  	gpio_set_level(GPIO_USB_C0_EXTPWR_EN, 1);
  	hook_call_deferred(&deferred_reset_pd_mcu_data, 1*MSEC);
  }
  
  void board_reset_pd_mcu(void)
  {
  	/* enable port controller's cable detection before reset */
  	anx7688_enable_cable_detection(0);
  
  	/* wait for 10ms, then start port controller's reset sequence */
  	hook_call_deferred(&deferred_reset_pd_mcu_data, 10*MSEC);
  }
  
  int command_pd_reset(int argc, char **argv)
  {
  	board_reset_pd_mcu();
  	return EC_SUCCESS;
  }
  DECLARE_CONSOLE_COMMAND(resetpd, command_pd_reset,
  			"",
  			"Reset PD IC");
  
  /**
   * There is a level shift for AC_OK & LID_OPEN signal between AP & EC,
   * disable it (drive high) when AP is off, otherwise enable it (drive low).
   */
  static void board_extpower_buffer_to_soc(void)
  {
  	/* Drive high when AP is off (G3), else drive low */
  	gpio_set_level(GPIO_LEVEL_SHIFT_EN_L,
  		       chipset_in_state(CHIPSET_STATE_HARD_OFF) ? 1 : 0);
  }
  
  /* Initialize board. */
  static void board_init(void)
  {
  	/* Enable Level shift of AC_OK & LID_OPEN signals */
  	board_extpower_buffer_to_soc();
  	/* Enable rev1 testing GPIOs */
  	gpio_set_level(GPIO_SYSTEM_POWER_H, 1);
  	/* Enable PD MCU interrupt */
  	gpio_enable_interrupt(GPIO_PD_MCU_INT);
  
  	/* Enable BC 1.2 */
  	gpio_enable_interrupt(GPIO_BC12_CABLE_INT);
  
  	/* Check if typeC is already connected, and do 7688 power on flow */
  	board_power_on_pd_mcu();
  
  	/* Update VBUS supplier */
  	usb_charger_vbus_change(0, !gpio_get_level(GPIO_USB_C0_VBUS_WAKE_L));
  
  	/* Remap SPI2 to DMA channels 6 and 7 */
  	REG32(STM32_DMA1_BASE + 0xa8) |= (1 << 20) | (1 << 21) |
  					 (1 << 24) | (1 << 25);
  }
  DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
  
  /**
   * Set active charge port -- only one port can active at a time.
   *
   * @param charge_port    Charge port to enable.
   *
   * Return EC_SUCCESS if charge port is accepted and made active.
   * EC_ERROR_* otherwise.
   */
  int board_set_active_charge_port(int charge_port)
  {
  	/* charge port is a physical port */
  	int is_real_port = (charge_port >= 0 &&
  			    charge_port < CONFIG_USB_PD_PORT_COUNT);
  	/* check if we are source VBUS on the port */
  	int source = gpio_get_level(GPIO_USB_C0_5V_EN);
  
  	if (is_real_port && source) {
  		CPRINTF("Skip enable p%d", charge_port);
  		return EC_ERROR_INVAL;
  	}
  
  	CPRINTF("New chg p%d", charge_port);
  
  	if (charge_port == CHARGE_PORT_NONE) {
  		/* Disable charging port */
  		gpio_set_level(GPIO_USB_C0_CHARGE_L, 1);
  	} else {
  		/* Enable charging port */
  		gpio_set_level(GPIO_USB_C0_CHARGE_L, 0);
  	}
  
  	return EC_SUCCESS;
  }
  
  /**
   * Set the charge limit based upon desired maximum.
   *
   * @param port          Port number.
   * @param supplier      Charge supplier type.
   * @param charge_ma     Desired charge limit (mA).
   * @param charge_mv     Negotiated charge voltage (mV).
   */
  void board_set_charge_limit(int port, int supplier, int charge_ma,
  			    int max_ma, int charge_mv)
  {
  	/* Limit input current 95% ratio on rowan board for safety */
  	charge_ma = (charge_ma * 95) / 100;
  	charge_set_input_current_limit(MAX(charge_ma,
  				   CONFIG_CHARGER_INPUT_CURRENT), charge_mv);
  	pd_send_host_event(PD_EVENT_POWER_CHANGE);
  }
  
  /**
   * Set AP reset.
   * AP_RESET_L (PC3, CPU_WARM_RESET_L) is connected to PMIC SYSRSTB
   */
  void board_set_ap_reset(int asserted)
  {
  	/* Signal is active-low */
  	CPRINTS("ap warm reset(%d)", asserted);
  	gpio_set_level(GPIO_AP_RESET_L, !asserted);
  }
  
  #ifdef CONFIG_TEMP_SENSOR_TMP432
  static void tmp432_set_power_deferred(void)
  {
  	/* Shut tmp432 down if not in S0 && no external power */
  	if (!extpower_is_present() && !chipset_in_state(CHIPSET_STATE_ON)) {
  		if (EC_SUCCESS != tmp432_set_power(TMP432_POWER_OFF))
  			CPRINTS("ERROR: Can't shutdown TMP432.");
  		return;
  	}
  
  	/*  else, turn it on. */
  	if (EC_SUCCESS != tmp432_set_power(TMP432_POWER_ON))
  		CPRINTS("ERROR: Can't turn on TMP432.");
  }
  DECLARE_DEFERRED(tmp432_set_power_deferred);
  #endif
  
  /**
   * Hook of AC change. turn on/off tmp432 depends on AP & AC status.
   */
  static void board_extpower(void)
  {
  	board_extpower_buffer_to_soc();
  #ifdef CONFIG_TEMP_SENSOR_TMP432
  	hook_call_deferred(&tmp432_set_power_deferred_data, 0);
  #endif
  }
  DECLARE_HOOK(HOOK_AC_CHANGE, board_extpower, HOOK_PRIO_DEFAULT);
  
  /* Called on AP S5 -> S3 transition, and before HOOK_CHIPSET_STARTUP */
  static void board_chipset_pre_init(void)
  {
  	/* Enable level shift of AC_OK when power on */
  	board_extpower_buffer_to_soc();
  
  	/* Enable SPI for BMI160 */
  	gpio_config_module(MODULE_SPI_MASTER, 1);
  
  	/* Set all four SPI pins to high speed */
  	/* pins B12/B13/B14/B15 */
  	STM32_GPIO_OSPEEDR(GPIO_B) |= 0xff000000;
  
  	/* Enable clocks to SPI2 module */
  	STM32_RCC_APB1ENR |= STM32_RCC_PB1_SPI2;
  
  	/* Reset SPI2 */
  	spi_enable(CONFIG_SPI_ACCEL_PORT, 0);
  	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_PRE_INIT, board_chipset_pre_init, HOOK_PRIO_DEFAULT);
  
  /* Called on AP S3 -> S5 transition */
  static void board_chipset_shutdown(void)
  {
  	/* Disable level shift to SoC when shutting down */
  	gpio_set_level(GPIO_LEVEL_SHIFT_EN_L, 1);
  
  	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);
  
  	/*
  	 * Calling gpio_config_module sets disabled alternate function pins to
  	 * GPIO_INPUT.  But to prevent leakage we want to set GPIO_OUT_LOW
  	 */
  	gpio_set_flags_by_mask(GPIO_B, 0xf000, GPIO_OUT_LOW);
  }
  DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, board_chipset_shutdown, HOOK_PRIO_DEFAULT);
  
  /* Called on AP S3 -> S0 transition */
  static void board_chipset_resume(void)
  {
  #ifdef CONFIG_TEMP_SENSOR_TMP432
  	hook_call_deferred(&tmp432_set_power_deferred_data, 0);
  #endif
  }
  DECLARE_HOOK(HOOK_CHIPSET_RESUME, board_chipset_resume, HOOK_PRIO_DEFAULT);
  
  /* Called on AP S0 -> S3 transition */
  static void board_chipset_suspend(void)
  {
  #ifdef CONFIG_TEMP_SENSOR_TMP432
  	hook_call_deferred(&tmp432_set_power_deferred_data, 0);
  #endif
  }
  DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, board_chipset_suspend, HOOK_PRIO_DEFAULT);
  
  /* ALS instances. Must be in same order as enum als_id. */
  struct als_t als[] = {
  	{"ISL", isl29035_init, isl29035_read_lux, 5},
  };
  BUILD_ASSERT(ARRAY_SIZE(als) == ALS_COUNT);
  
  /* Motion sensors */
  /* Mutexes */
  static struct mutex g_lid_mutex;
  
  /* Matrix to rotate accelerometer into standard reference frame */
  const matrix_3x3_t lid_standard_ref = {
  	{ FLOAT_TO_FP(-1), 0,  0},
  	{ 0, FLOAT_TO_FP(-1), 0},
  	{ 0,  0, FLOAT_TO_FP(1)}
  };
  
  static struct bmi160_drv_data_t g_bmi160_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.
  	 */
  	{.name = "Lid Accel",
  	 .active_mask = SENSOR_ACTIVE_S0_S3,
  	 .chip = MOTIONSENSE_CHIP_BMI160,
  	 .type = MOTIONSENSE_TYPE_ACCEL,
  	 .location = MOTIONSENSE_LOC_LID,
  	 .drv = &bmi160_drv,
  	 .mutex = &g_lid_mutex,
  	 .drv_data = &g_bmi160_data,
  	 .port = CONFIG_SPI_ACCEL_PORT,
  	 .addr = BMI160_SET_SPI_ADDRESS(CONFIG_SPI_ACCEL_PORT),
  	 .rot_standard_ref = &lid_standard_ref,
  	 .default_range = 2,  /* g, enough for laptop. */
  	 .min_frequency = BMI160_ACCEL_MIN_FREQ,
  	 .max_frequency = BMI160_ACCEL_MAX_FREQ,
  	 .config = {
  		 /* AP: by default use EC settings */
  		 [SENSOR_CONFIG_AP] = {
  			 .odr = 0,
  			 .ec_rate = 0,
  		 },
  		 /* Sensor on in S0 for Chrome screen orientation */
  		 [SENSOR_CONFIG_EC_S0] = {
  			 .odr = 10000 | ROUND_UP_FLAG,
  			 .ec_rate = 100 * MSEC,
  		 },
  		 /* Sensor off in S3/S5 */
  		 [SENSOR_CONFIG_EC_S3] = {
  			 .odr = 0,
  			 .ec_rate = 0
  		 },
  		 /* Sensor off in S3/S5 */
  		 [SENSOR_CONFIG_EC_S5] = {
  			 .odr = 0,
  			 .ec_rate = 0
  		 },
  	 },
  	},
  
  	{.name = "Lid Gyro",
  	 .active_mask = SENSOR_ACTIVE_S0_S3,
  	 .chip = MOTIONSENSE_CHIP_BMI160,
  	 .type = MOTIONSENSE_TYPE_GYRO,
  	 .location = MOTIONSENSE_LOC_LID,
  	 .drv = &bmi160_drv,
  	 .mutex = &g_lid_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 = &lid_standard_ref,
  	 .min_frequency = BMI160_GYRO_MIN_FREQ,
  	 .max_frequency = BMI160_GYRO_MAX_FREQ,
  	 .config = {
  		 /* AP: by default shutdown all sensors */
  		 [SENSOR_CONFIG_AP] = {
  			 .odr = 0,
  			 .ec_rate = 0,
  		 },
  		 /* Sensor off in S0 by default */
  		 [SENSOR_CONFIG_EC_S0] = {
  			 .odr = 0,
  			 .ec_rate = 0,
  		 },
  		 /* Sensor off in S3/S5 */
  		 [SENSOR_CONFIG_EC_S3] = {
  			 .odr = 0,
  			 .ec_rate = 0,
  		 },
  		 /* Sensor off in S3/S5 */
  		 [SENSOR_CONFIG_EC_S5] = {
  			 .odr = 0,
  			 .ec_rate = 0,
  		 },
  	 },
  	},
  };
  const unsigned int motion_sensor_count = ARRAY_SIZE(motion_sensors);
  
  uint16_t tcpc_get_alert_status(void)
  {
  	return gpio_get_level(GPIO_PD_MCU_INT) ? PD_STATUS_TCPC_ALERT_0 : 0;
  }
  
  