text: /* Copyright 2018 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.
   */
  
  /* Rammus board-specific configuration */
  
  #include "adc.h"
  #include "adc_chip.h"
  #include "anx7447.h"
  #include "bd99992gw.h"
  #include "board_config.h"
  #include "button.h"
  #include "charge_manager.h"
  #include "charge_state.h"
  #include "charge_ramp.h"
  #include "charger.h"
  #include "chipset.h"
  #include "console.h"
  #include "cros_board_info.h"
  #include "driver/accelgyro_bmi_common.h"
  #include "driver/accel_bma2x2.h"
  #include "driver/charger/isl923x.h"
  #include "driver/tcpm/ps8xxx.h"
  #include "driver/tcpm/tcpci.h"
  #include "driver/tcpm/tcpm.h"
  #include "driver/temp_sensor/bd99992gw.h"
  #include "extpower.h"
  #include "gpio.h"
  #include "hooks.h"
  #include "host_command.h"
  #include "i2c.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 "pwm.h"
  #include "pwm_chip.h"
  #include "spi.h"
  #include "switch.h"
  #include "system.h"
  #include "tablet_mode.h"
  #include "task.h"
  #include "temp_sensor.h"
  #include "timer.h"
  #include "uart.h"
  #include "usb_charge.h"
  #include "usb_mux.h"
  #include "usb_pd.h"
  #include "usb_pd_tcpm.h"
  #include "util.h"
  #include "espi.h"
  
  #define CPRINTS(format, args...) cprints(CC_SYSTEM, format, ## args)
  #define CPRINTF(format, args...) cprintf(CC_SYSTEM, format, ## args)
  
  #define USB_PD_PORT_PS8751	1
  #define USB_PD_PORT_ANX7447	0
  
  static void tcpc_alert_event(enum gpio_signal signal)
  {
  	int port = -1;
  
  	switch (signal) {
  	case GPIO_USB_C0_PD_INT_ODL:
  		port = 0;
  		break;
  	case GPIO_USB_C1_PD_INT_ODL:
  		port = 1;
  		break;
  	default:
  		return;
  	}
  
  	schedule_deferred_pd_interrupt(port);
  }
  
  /* Set PD discharge whenever VBUS detection is high (i.e. below threshold). */
  static void vbus_discharge_handler(void)
  {
  	pd_set_vbus_discharge(0, gpio_get_level(GPIO_USB_C0_VBUS_DET_L));
  	pd_set_vbus_discharge(1, gpio_get_level(GPIO_USB_C1_VBUS_DET_L));
  }
  DECLARE_DEFERRED(vbus_discharge_handler);
  
  void vbus0_evt(enum gpio_signal signal)
  {
  	/* VBUS present GPIO is inverted */
  	usb_charger_vbus_change(0, !gpio_get_level(signal));
  	task_wake(TASK_ID_PD_C0);
  	hook_call_deferred(&vbus_discharge_handler_data, 0);
  }
  
  void vbus1_evt(enum gpio_signal signal)
  {
  	/* VBUS present GPIO is inverted */
  	usb_charger_vbus_change(1, !gpio_get_level(signal));
  	task_wake(TASK_ID_PD_C1);
  	hook_call_deferred(&vbus_discharge_handler_data, 0);
  }
  
  void usb0_evt(enum gpio_signal signal)
  {
  	task_set_event(TASK_ID_USB_CHG_P0, USB_CHG_EVENT_BC12, 0);
  }
  
  void usb1_evt(enum gpio_signal signal)
  {
  	task_set_event(TASK_ID_USB_CHG_P1, USB_CHG_EVENT_BC12, 0);
  }
  
  #include "gpio_list.h"
  
  /* Hibernate wake configuration */
  const enum gpio_signal hibernate_wake_pins[] = {
  	GPIO_AC_PRESENT,
  	GPIO_LID_OPEN,
  	GPIO_POWER_BUTTON_L,
  };
  const int hibernate_wake_pins_used = ARRAY_SIZE(hibernate_wake_pins);
  
  /* ADC channels */
  const struct adc_t adc_channels[] = {
  	/* Vbus sensing (10x voltage divider). */
  	[ADC_VBUS] = {"VBUS", NPCX_ADC_CH2, ADC_MAX_VOLT*10, ADC_READ_MAX+1, 0},
  	/*
  	 * Adapter current output or battery charging/discharging current (uV)
  	 * 18x amplification on charger side.
  	 */
  	[ADC_AMON_BMON] = {"AMON_BMON", NPCX_ADC_CH1, ADC_MAX_VOLT*1000/18,
  			   ADC_READ_MAX+1, 0},
  };
  BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT);
  
  /* I2C port map */
  const struct i2c_port_t i2c_ports[]  = {
  	{"i2c_0_0", NPCX_I2C_PORT0_0, 400, GPIO_I2C0_0_SCL, GPIO_I2C0_0_SDA},
  	{"i2c_0_1", NPCX_I2C_PORT0_1, 400, GPIO_I2C0_1_SCL, GPIO_I2C0_1_SDA},
  	{"i2c_1",   NPCX_I2C_PORT1,   100, GPIO_I2C1_SCL,   GPIO_I2C1_SDA},
  	{"i2c_2",   NPCX_I2C_PORT2,   400, GPIO_I2C2_SCL,   GPIO_I2C2_SDA},
  	{"i2c_3",   NPCX_I2C_PORT3,   400, GPIO_I2C3_SCL,   GPIO_I2C3_SDA},
  };
  const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports);
  
  /* Charger Chips */
  const struct charger_config_t chg_chips[] = {
  	{
  		.i2c_port = I2C_PORT_CHARGER,
  		.i2c_addr_flags = ISL923X_ADDR_FLAGS,
  		.drv = &isl923x_drv,
  	},
  };
  
  /* TCPC mux configuration */
  struct tcpc_config_t tcpc_config[CONFIG_USB_PD_PORT_MAX_COUNT] = {
  	[USB_PD_PORT_PS8751] = {
  		.bus_type = EC_BUS_TYPE_I2C,
  		.i2c_info = {
  			.port = I2C_PORT_TCPC1,
  			.addr_flags = PS8751_I2C_ADDR1_FLAGS,
  		},
  		.drv = &ps8xxx_tcpm_drv,
  	},
  	[USB_PD_PORT_ANX7447] = {
  		.bus_type = EC_BUS_TYPE_I2C,
  		.i2c_info = {
  			.port = I2C_PORT_TCPC0,
  			/* Verified on v1.1 */
  			.addr_flags = AN7447_TCPC3_I2C_ADDR_FLAGS,
  		},
  		.drv = &anx7447_tcpm_drv,
  	},
  };
  
  const struct usb_mux usb_muxes[CONFIG_USB_PD_PORT_MAX_COUNT] = {
  	[USB_PD_PORT_PS8751] = {
  		.usb_port = USB_PD_PORT_PS8751,
  		.driver = &tcpci_tcpm_usb_mux_driver,
  		.hpd_update = &ps8xxx_tcpc_update_hpd_status,
  	},
  	[USB_PD_PORT_ANX7447] = {
  		.usb_port = USB_PD_PORT_ANX7447,
  		.driver = &anx7447_usb_mux_driver,
  		.hpd_update = &anx7447_tcpc_update_hpd_status,
  	}
  };
  
  struct pi3usb9281_config pi3usb9281_chips[] = {
  	[USB_PD_PORT_PS8751] = {
  		.i2c_port = I2C_PORT_USB_CHARGER_1,
  		.mux_lock = NULL,
  	},
  	[USB_PD_PORT_ANX7447] = {
  		.i2c_port = I2C_PORT_USB_CHARGER_0,
  		.mux_lock = NULL,
  	},
  };
  BUILD_ASSERT(ARRAY_SIZE(pi3usb9281_chips) ==
  	     CONFIG_BC12_DETECT_PI3USB9281_CHIP_COUNT);
  
  const int usb_port_enable[CONFIG_USB_PORT_POWER_SMART_PORT_COUNT] = {
  	GPIO_EN_USB_A_5V,
  };
  
  void board_reset_pd_mcu(void)
  {
  	/* Assert reset */
  	gpio_set_level(GPIO_USB_PD_RST_C0, 1);
  	gpio_set_level(GPIO_USB_C1_PD_RST_ODL, 0);
  	msleep(1);
  	gpio_set_level(GPIO_USB_PD_RST_C0, 0);
  	gpio_set_level(GPIO_USB_C1_PD_RST_ODL, 1);
  	/* After TEST_R release, anx7447/3447 needs 2ms to finish eFuse
  	 * loading.
  	 */
  	msleep(2);
  }
  
  /*
   * Read CBI data from EEPROM via i2c and remap the ps8751 i2c port
   */
  static void ps8751_i2c_remap(void)
  {
  	uint32_t board_version;
  
  	if (cbi_get_board_version(&board_version) != EC_SUCCESS ||
  		board_version > 1)
  		return;
  	/*
  	 * Due to b/118063849, we separate the ps8751 and anx3447 to
  	 * different i2c bus which start from board_version >= 2.
  	 * For the board_version <= 1, the ps8751 and anx3447 TCPC
  	 * use the same i2c bus. Thus, reconfig the ps8751 i2c port
  	 * to i2c_0_0.
  	 */
  	tcpc_config[USB_PD_PORT_PS8751].i2c_info.port = I2C_PORT_TCPC0;
  }
  
  void board_tcpc_init(void)
  {
  	ps8751_i2c_remap();
  
  	/* Only reset TCPC if not sysjump */
  	if (!system_jumped_late()) {
  		board_reset_pd_mcu();
  	}
  
  	/* Enable TCPC interrupts */
  	gpio_enable_interrupt(GPIO_USB_C0_PD_INT_ODL);
  	gpio_enable_interrupt(GPIO_USB_C1_PD_INT_ODL);
  
  	/*
  	 * Initialize HPD to low; after sysjump SOC needs to see
  	 * HPD pulse to enable video path
  	 */
  	for (int port = 0; port < CONFIG_USB_PD_PORT_MAX_COUNT; ++port)
  		usb_mux_hpd_update(port, 0, 0);
  }
  DECLARE_HOOK(HOOK_INIT, board_tcpc_init, HOOK_PRIO_INIT_I2C+1);
  
  uint16_t tcpc_get_alert_status(void)
  {
  	uint16_t status = 0;
  
  	if (!gpio_get_level(GPIO_USB_C0_PD_INT_ODL)) {
  		if (!gpio_get_level(GPIO_USB_PD_RST_C0))
  			status |= PD_STATUS_TCPC_ALERT_0;
  	}
  
  	if (!gpio_get_level(GPIO_USB_C1_PD_INT_ODL)) {
  		if (gpio_get_level(GPIO_USB_C1_PD_RST_ODL))
  			status |= PD_STATUS_TCPC_ALERT_1;
  	}
  
  	return status;
  }
  
  const struct temp_sensor_t temp_sensors[] = {
  	{"Battery", TEMP_SENSOR_TYPE_BATTERY, charge_get_battery_temp, 0},
  
  	/* These BD99992GW temp sensors are only readable in S0 */
  	{"Ambient", TEMP_SENSOR_TYPE_BOARD, bd99992gw_get_val,
  	 BD99992GW_ADC_CHANNEL_SYSTHERM0},
  	{"Charger", TEMP_SENSOR_TYPE_BOARD, bd99992gw_get_val,
  	 BD99992GW_ADC_CHANNEL_SYSTHERM1},
  	{"DRAM", TEMP_SENSOR_TYPE_BOARD, bd99992gw_get_val,
  	 BD99992GW_ADC_CHANNEL_SYSTHERM2},
  	{"eMMC", TEMP_SENSOR_TYPE_BOARD, bd99992gw_get_val,
  	 BD99992GW_ADC_CHANNEL_SYSTHERM3},
  };
  BUILD_ASSERT(ARRAY_SIZE(temp_sensors) == TEMP_SENSOR_COUNT);
  
  /*
   * Check if PMIC fault registers indicate VR fault. If yes, print out fault
   * register info to console. Additionally, set panic reason so that the OS can
   * check for fault register info by looking at offset 0x14(PWRSTAT1) and
   * 0x15(PWRSTAT2) in cros ec panicinfo.
   */
  static void board_report_pmic_fault(const char *str)
  {
  	int vrfault, pwrstat1 = 0, pwrstat2 = 0;
  	uint32_t info;
  
  	/* RESETIRQ1 -- Bit 4: VRFAULT */
  	if (i2c_read8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x8, &vrfault)
  	    != EC_SUCCESS)
  		return;
  
  	if (!(vrfault & BIT(4)))
  		return;
  
  	/* VRFAULT has occurred, print VRFAULT status bits. */
  
  	/* PWRSTAT1 */
  	i2c_read8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x16, &pwrstat1);
  
  	/* PWRSTAT2 */
  	i2c_read8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x17, &pwrstat2);
  
  	CPRINTS("PMIC VRFAULT: %s", str);
  	CPRINTS("PMIC VRFAULT: PWRSTAT1=0x%02x PWRSTAT2=0x%02x", pwrstat1,
  		pwrstat2);
  
  	/* Clear all faults -- Write 1 to clear. */
  	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x8, BIT(4));
  	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x16, pwrstat1);
  	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x17, pwrstat2);
  
  	/*
  	 * Status of the fault registers can be checked in the OS by looking at
  	 * offset 0x14(PWRSTAT1) and 0x15(PWRSTAT2) in cros ec panicinfo.
  	 */
  	info = ((pwrstat2 & 0xFF) << 8) | (pwrstat1 & 0xFF);
  	panic_set_reason(PANIC_SW_PMIC_FAULT, info, 0);
  }
  
  static void board_pmic_disable_slp_s0_vr_decay(void)
  {
  	/*
  	 * VCCIOCNT:
  	 * Bit 6    (0)   - Disable decay of VCCIO on SLP_S0# assertion
  	 * Bits 5:4 (11)  - Nominal output voltage: 0.850V
  	 * Bits 3:2 (10)  - VR set to AUTO on SLP_S0# de-assertion
  	 * Bits 1:0 (10)  - VR set to AUTO operating mode
  	 */
  	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x30, 0x3a);
  
  	/*
  	 * V18ACNT:
  	 * Bits 7:6 (00) - Disable low power mode on SLP_S0# assertion
  	 * Bits 5:4 (10) - Nominal voltage set to 1.8V
  	 * Bits 3:2 (10) - VR set to AUTO on SLP_S0# de-assertion
  	 * Bits 1:0 (10) - VR set to AUTO operating mode
  	 */
  	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x34, 0x2a);
  
  	/*
  	 * V085ACNT:
  	 * Bits 7:6 (00) - Disable low power mode on SLP_S0# assertion
  	 * Bits 5:4 (11) - Nominal voltage 1.0V
  	 * Bits 3:2 (10) - VR set to AUTO on SLP_S0# de-assertion
  	 * Bits 1:0 (10) - VR set to AUTO operating mode
  	 */
  	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x38, 0x3a);
  }
  
  static void board_pmic_enable_slp_s0_vr_decay(void)
  {
  	/*
  	 * VCCIOCNT:
  	 * Bit 6    (1)   - Enable decay of VCCIO on SLP_S0# assertion
  	 * Bits 5:4 (11)  - Nominal output voltage: 0.850V
  	 * Bits 3:2 (10)  - VR set to AUTO on SLP_S0# de-assertion
  	 * Bits 1:0 (10)  - VR set to AUTO operating mode
  	 */
  	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x30, 0x7a);
  
  	/*
  	 * V18ACNT:
  	 * Bits 7:6 (01) - Enable low power mode on SLP_S0# assertion
  	 * Bits 5:4 (10) - Nominal voltage set to 1.8V
  	 * Bits 3:2 (10) - VR set to AUTO on SLP_S0# de-assertion
  	 * Bits 1:0 (10) - VR set to AUTO operating mode
  	 */
  	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x34, 0x6a);
  
  	/*
  	 * V085ACNT:
  	 * Bits 7:6 (01) - Enable low power mode on SLP_S0# assertion
  	 * Bits 5:4 (11) - Nominal voltage 1.0V
  	 * Bits 3:2 (10) - VR set to AUTO on SLP_S0# de-assertion
  	 * Bits 1:0 (10) - VR set to AUTO operating mode
  	 */
  	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x38, 0x7a);
  }
  
  __override void power_board_handle_host_sleep_event(
  		enum host_sleep_event state)
  {
  	if (state == HOST_SLEEP_EVENT_S0IX_SUSPEND)
  		board_pmic_enable_slp_s0_vr_decay();
  	else if (state == HOST_SLEEP_EVENT_S0IX_RESUME)
  		board_pmic_disable_slp_s0_vr_decay();
  }
  
  static void board_pmic_init(void)
  {
  	board_report_pmic_fault("SYSJUMP");
  
  	if (system_jumped_late())
  		return;
  
  	/*
  	 * DISCHGCNT2 - enable 100 ohm discharge on
  	 * V5A_DS3/V33A_DSW/V33A_PCH/V1.8A
  	 */
  	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x3d, 0x55);
  	/* DISCHGCNT3 - enable 100 ohm discharge on V1.8U_25U/V1.00A */
  	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x3e, 0x44);
  	/* DISCHGCNT4 - enable 100 ohm discharge on v1.8S */
  	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x3f, 0x04);
  
  	board_pmic_disable_slp_s0_vr_decay();
  
  	/* VRMODECTRL - disable low-power mode for all rails */
  	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x3b, 0x1f);
  }
  DECLARE_DEFERRED(board_pmic_init);
  
  /* Initialize board. */
  static void board_init(void)
  {
  	/*
  	 * This enables pull-down on F_DIO1 (SPI MISO), and F_DIO0 (SPI MOSI),
  	 * whenever the EC is not doing SPI flash transactions. This avoids
  	 * floating SPI buffer input (MISO), which causes power leakage (see
  	 * b/64797021).
  	 */
  	NPCX_PUPD_EN1 |= BIT(NPCX_DEVPU1_F_SPI_PUD_EN);
  
  	/* Provide AC status to the PCH */
  	gpio_set_level(GPIO_PCH_ACPRESENT, extpower_is_present());
  
  	/* Enable sensors power supply */
  	gpio_set_level(GPIO_EN_PP1800_DX_SENSOR, 1);
  
  	/* Enable VBUS interrupt */
  	gpio_enable_interrupt(GPIO_USB_C0_VBUS_DET_L);
  	gpio_enable_interrupt(GPIO_USB_C1_VBUS_DET_L);
  
  	/* Enable pericom BC1.2 interrupts */
  	gpio_enable_interrupt(GPIO_USB_C0_BC12_INT_L);
  	gpio_enable_interrupt(GPIO_USB_C1_BC12_INT_L);
  
  	/* Enable Gyro interrupts */
  	gpio_enable_interrupt(GPIO_BASE_SIXAXIS_INT_L);
  
  	/* Initialize PMIC */
  	hook_call_deferred(&board_pmic_init_data, 0);
  }
  DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
  
  static void usb_charge_mode_init(void)
  {
  	/*
  	 * By default, turn the charging off when system suspends.
  	 * If system power on with connecting a USB device,
  	 * the OS must send an event to EC to clear the
  	 * inhibit_charging_in_suspend.
  	 */
  	usb_charge_set_mode(0, CONFIG_USB_PORT_POWER_SMART_DEFAULT_MODE,
  			USB_DISALLOW_SUSPEND_CHARGE);
  }
  DECLARE_HOOK(HOOK_INIT, usb_charge_mode_init, HOOK_PRIO_DEFAULT + 1);
  
  /**
   * Buffer the AC present GPIO to the PCH.
   */
  static void board_extpower(void)
  {
  	gpio_set_level(GPIO_PCH_ACPRESENT, extpower_is_present());
  }
  DECLARE_HOOK(HOOK_AC_CHANGE, board_extpower, HOOK_PRIO_DEFAULT);
  
  /**
   * Set active charge port -- only one port can be active at a time.
   *
   * @param charge_port   Charge port to enable.
   *
   * Returns 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_MAX_COUNT);
  	/* check if we are source VBUS on the port */
  	int source = gpio_get_level(charge_port == 0 ? GPIO_USB_C0_5V_EN :
  						       GPIO_USB_C1_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 both ports */
  		gpio_set_level(GPIO_EN_USB_C0_CHARGE_EC_L, 1);
  		gpio_set_level(GPIO_EN_USB_C1_CHARGE_EC_L, 1);
  	} else {
  		/* Make sure non-charging port is disabled */
  		gpio_set_level(charge_port ? GPIO_EN_USB_C0_CHARGE_EC_L :
  					     GPIO_EN_USB_C1_CHARGE_EC_L, 1);
  		/* Enable charging port */
  		gpio_set_level(charge_port ? GPIO_EN_USB_C1_CHARGE_EC_L :
  					     GPIO_EN_USB_C0_CHARGE_EC_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 the input current to 96% negotiated limit,
  	 * to account for the charger chip margin.
  	 */
  	charge_ma = charge_ma * 96 / 100;
  	charge_set_input_current_limit(
  			MAX(charge_ma, CONFIG_CHARGER_INPUT_CURRENT),
  			charge_mv);
  }
  
  void board_hibernate(void)
  {
  	CPRINTS("Triggering PMIC shutdown.");
  	uart_flush_output();
  
  	/* Trigger PMIC shutdown. */
  	if (i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992_FLAGS, 0x49, 0x01)) {
  		/*
  		 * If we can't tell the PMIC to shutdown, instead reset
  		 * and don't start the AP. Hopefully we'll be able to
  		 * communicate with the PMIC next time.
  		 */
  		CPRINTS("PMIC i2c failed.");
  		system_reset(SYSTEM_RESET_LEAVE_AP_OFF);
  	}
  
  	/* Await shutdown. */
  	while (1)
  		;
  }
  
  const struct pwm_t pwm_channels[] = {
  	/*
  	 * 1.2kHz is a multiple of both 50 and 60. So a video recorder
  	 * (generally designed to ignore either 50 or 60 Hz flicker) will not
  	 * alias with refresh rate.
  	 */
  	[PWM_CH_KBLIGHT] = { 4, 0, 1200 },
  };
  BUILD_ASSERT(ARRAY_SIZE(pwm_channels) == PWM_CH_COUNT);
  
  /* Lid Sensor mutex */
  static struct mutex g_lid_mutex;
  static struct mutex g_base_mutex;
  
  static struct bmi_drv_data_t g_bmi160_data;
  
  /* BMA255 private data */
  static struct accelgyro_saved_data_t g_bma255_data;
  
  /* Matrix to rotate accelrator into standard reference frame */
  const mat33_fp_t base_standard_ref = {
  	{ FLOAT_TO_FP(1), 0, 0 },
  	{ 0,  FLOAT_TO_FP(-1), 0 },
  	{ 0, 0, FLOAT_TO_FP(-1) }
  };
  
  const mat33_fp_t lid_standard_ref = {
  	{ FLOAT_TO_FP(-1), 0, 0 },
  	{ 0,  FLOAT_TO_FP(1), 0 },
  	{ 0, 0, FLOAT_TO_FP(-1) }
  };
  
  struct motion_sensor_t motion_sensors[] = {
  	[LID_ACCEL] = {
  		.name = "Lid Accel",
  		.active_mask = SENSOR_ACTIVE_S0_S3,
  		.chip = MOTIONSENSE_CHIP_BMA255,
  		.type = MOTIONSENSE_TYPE_ACCEL,
  		.location = MOTIONSENSE_LOC_LID,
  		.drv = &bma2x2_accel_drv,
  		.mutex = &g_lid_mutex,
  		.drv_data = &g_bma255_data,
  		.port = I2C_PORT_ACCEL,
  		.i2c_spi_addr_flags = BMA2x2_I2C_ADDR1_FLAGS,
  		.rot_standard_ref = &lid_standard_ref,
  		.min_frequency = BMA255_ACCEL_MIN_FREQ,
  		.max_frequency = BMA255_ACCEL_MAX_FREQ,
  		.default_range = 2, /* g, to support lid angle calculation. */
  		.config = {
  			/* EC use accel for angle detection */
  			[SENSOR_CONFIG_EC_S0] = {
  				.odr = 10000 | ROUND_UP_FLAG,
  				.ec_rate = 0,
  			},
  			/* Sensor on in S3 */
  			[SENSOR_CONFIG_EC_S3] = {
  				.odr = 10000 | ROUND_UP_FLAG,
  				.ec_rate = 0,
  			},
  		},
  	},
  	[BASE_ACCEL] = {
  		.name = "Base Accel",
  		.active_mask = SENSOR_ACTIVE_S0_S3,
  		.chip = MOTIONSENSE_CHIP_BMI160,
  		.type = MOTIONSENSE_TYPE_ACCEL,
  		.location = MOTIONSENSE_LOC_BASE,
  		.drv = &bmi160_drv,
  		.mutex = &g_base_mutex,
  		.drv_data = &g_bmi160_data,
  		.port = I2C_PORT_ACCEL,
  		.i2c_spi_addr_flags = BMI160_ADDR0_FLAGS,
  		.rot_standard_ref = &base_standard_ref,
  		.min_frequency = BMI_ACCEL_MIN_FREQ,
  		.max_frequency = BMI_ACCEL_MAX_FREQ,
  		.default_range = 4,  /* g, to meet CDD 7.3.1/C-1-4 reqs */
  		.config = {
  			/* EC use accel for angle detection */
  			[SENSOR_CONFIG_EC_S0] = {
  				.odr = 10000 | ROUND_UP_FLAG,
  				.ec_rate = 100 * MSEC,
  			},
  			/* Sensor on in S3 */
  			[SENSOR_CONFIG_EC_S3] = {
  				.odr = 10000 | ROUND_UP_FLAG,
  				.ec_rate = 0,
  			},
  		},
  	},
  	[BASE_GYRO] = {
  		.name = "Base Gyro",
  		.active_mask = SENSOR_ACTIVE_S0_S3,
  		.chip = MOTIONSENSE_CHIP_BMI160,
  		.type = MOTIONSENSE_TYPE_GYRO,
  		.location = MOTIONSENSE_LOC_BASE,
  		.drv = &bmi160_drv,
  		.mutex = &g_base_mutex,
  		.drv_data = &g_bmi160_data,
  		.port = I2C_PORT_ACCEL,
  		.i2c_spi_addr_flags = BMI160_ADDR0_FLAGS,
  		.default_range = 1000, /* dps */
  		.rot_standard_ref = &base_standard_ref,
  		.min_frequency = BMI_GYRO_MIN_FREQ,
  		.max_frequency = BMI_GYRO_MAX_FREQ,
  	},
  };
  const unsigned int motion_sensor_count = ARRAY_SIZE(motion_sensors);
  
  /* Enable or disable input devices, based on chipset state and tablet mode */
  #ifndef TEST_BUILD
  void lid_angle_peripheral_enable(int enable)
  {
  	/* If the lid is in 360 position, ignore the lid angle,
  	 * which might be faulty. Disable keyboard.
  	 */
  	if (tablet_get_mode() || chipset_in_state(CHIPSET_STATE_ANY_OFF))
  		enable = 0;
  	keyboard_scan_enable(enable, KB_SCAN_DISABLE_LID_ANGLE);
  }
  #endif
  
  static void board_chipset_reset(void)
  {
  	board_report_pmic_fault("CHIPSET RESET");
  }
  DECLARE_HOOK(HOOK_CHIPSET_RESET, board_chipset_reset, HOOK_PRIO_DEFAULT);
  
  /* Called on AP S3 -> S0 transition */
  static void board_chipset_resume(void)
  {
  	gpio_set_level(GPIO_ENABLE_BACKLIGHT, 1);
  	gpio_set_level(GPIO_KB_BL_EN, 1);
  }
  DECLARE_HOOK(HOOK_CHIPSET_RESUME, board_chipset_resume, HOOK_PRIO_DEFAULT);
  
  /* Called on AP S0 -> S3 transition */
  static void board_chipset_suspend(void)
  {
  	gpio_set_level(GPIO_ENABLE_BACKLIGHT, 0);
  	gpio_set_level(GPIO_KB_BL_EN, 0);
  }
  DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, board_chipset_suspend, HOOK_PRIO_DEFAULT);
  
  /* Called on AP S5 -> S3 transition */
  static void board_chipset_startup(void)
  {
  	gpio_set_level(GPIO_EN_PP3300_TRACKPAD, 1);
  }
  DECLARE_HOOK(HOOK_CHIPSET_STARTUP, board_chipset_startup, HOOK_PRIO_DEFAULT);
  
  /* Called on AP S3 -> S5 transition */
  static void board_chipset_shutdown(void)
  {
  	gpio_set_level(GPIO_EN_PP3300_TRACKPAD, 0);
  }
  DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, board_chipset_shutdown, HOOK_PRIO_DEFAULT);
  