/* 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.
 */

/* Reef board-specific configuration */

#include "adc.h"
#include "adc_chip.h"
#include "als.h"
#include "button.h"
#include "charge_manager.h"
#include "charge_ramp.h"
#include "charge_state.h"
#include "charger.h"
#include "chipset.h"
#include "console.h"
#include "driver/als_opt3001.h"
#include "driver/accel_kionix.h"
#include "driver/accel_kx022.h"
#include "driver/accelgyro_bmi_common.h"
#include "driver/baro_bmp280.h"
#include "driver/charger/bd9995x.h"
#include "driver/tcpm/anx74xx.h"
#include "driver/tcpm/ps8xxx.h"
#include "driver/tcpm/tcpci.h"
#include "driver/tcpm/tcpm.h"
#include "extpower.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "i2c.h"
#include "keyboard_scan.h"
#include "lid_angle.h"
#include "lid_switch.h"
#include "math_util.h"
#include "motion_sense.h"
#include "motion_lid.h"
#include "power.h"
#include "power_button.h"
#include "pwm.h"
#include "pwm_chip.h"
#include "lpc_chip.h"
#include "spi.h"
#include "spi_chip.h"
#include "switch.h"
#include "system.h"
#include "tablet_mode.h"
#include "task.h"
#include "temp_sensor.h"
#include "tfdp_chip.h"
#include "thermistor.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"


#define CPUTS(outstr) cputs(CC_USBCHARGE, outstr)
#define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args)
#define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args)

#define IN_ALL_SYS_PG	POWER_SIGNAL_MASK(X86_ALL_SYS_PG)
#define IN_PGOOD_PP3300	POWER_SIGNAL_MASK(X86_PGOOD_PP3300)
#define IN_PGOOD_PP5000	POWER_SIGNAL_MASK(X86_PGOOD_PP5000)

#define USB_PD_PORT_ANX74XX	0
#define USB_PD_PORT_PS8751	1

#ifdef CONFIG_BOARD_PRE_INIT
/*
 * reefmchp - requires changing
 * VTR1 pin domain = 3.3V
 * VTR2 pin domain = 1.8V
 * VTR3 pin domain = 3.3V
 */
void board_config_pre_init(void)
{
	MCHP_EC_GPIO_BANK_PWR = MCHP_EC_GPIO_BANK_PWR_VTR2_18;

#ifdef CONFIG_LOW_POWER_IDLE
	/* DEBUG - GPIO_0060 becomes 48MHZ_OUT
	 * MEC1701 interposer J47-7
	 */
	gpio_config_module(MODULE_CHIPSET, 1);
#endif
}
#endif

/*
 * NOTES: The PD GPIO's are armed for falling edge.
 * There is a potential race condition in this routine.
 * ISR calls this routine and it reads state of GPIO pin.
 * If GPIO is still asserted low, this routine will do nothing.
 * If this routine samples GPIO after it returns high then it
 * will wake the PDCMD task.
 */
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);
}

#ifdef CONFIG_USB_PD_TCPC_LOW_POWER
static void anx74xx_cable_det_handler(void)
{
	int cable_det = gpio_get_level(GPIO_USB_C0_CABLE_DET);
	int reset_n = gpio_get_level(GPIO_USB_C0_PD_RST_L);

	/*
	 * A cable_det low->high transition was detected. If following the
	 * debounce time, cable_det is high, and reset_n is low, then ANX3429 is
	 * currently in standby mode and needs to be woken up. Set the
	 * TCPC_RESET event which will bring the ANX3429 out of standby
	 * mode. Setting this event is gated on reset_n being low because the
	 * ANX3429 will always set cable_det when transitioning to normal mode
	 * and if in normal mode, then there is no need to trigger a tcpc reset.
	 */
	if (cable_det && !reset_n)
		task_set_event(TASK_ID_PD_C0, PD_EVENT_TCPC_RESET);
}
DECLARE_DEFERRED(anx74xx_cable_det_handler);
/* from firmware-reef-9042.B */
DECLARE_HOOK(HOOK_CHIPSET_RESUME, anx74xx_cable_det_handler, HOOK_PRIO_LAST);

void anx74xx_cable_det_interrupt(enum gpio_signal signal)
{
	/* debounce for 2 msec */
	hook_call_deferred(&anx74xx_cable_det_handler_data, (2 * MSEC));
}
#endif

/*
 * enable_input_devices() is called by the tablet_mode ISR, but changes the
 * state of GPIOs, so its definition must reside after including gpio_list.
 * Use DECLARE_DEFERRED to generate enable_input_devices_data.
 */
static void enable_input_devices(void);
DECLARE_DEFERRED(enable_input_devices);

#define LID_DEBOUNCE_US    (30 * MSEC)  /* Debounce time for lid switch */
void tablet_mode_interrupt(enum gpio_signal signal)
{
	hook_call_deferred(&enable_input_devices_data, LID_DEBOUNCE_US);
}

#include "gpio_list.h"

/* SPI devices */
const struct spi_device_t spi_devices[] = {
	{ QMSPI0_PORT, 4, GPIO_QMSPI_CS0},
#if defined(CONFIG_SPI_ACCEL_PORT)
	{ GPSPI0_PORT, 2, GPIO_SPI0_CS0 },
#endif
};
const unsigned int spi_devices_used = ARRAY_SIZE(spi_devices);

/* ADC channels */
/* chip/mchp defined adc_t
 * name, factor_mul, factor_div, shift, channel
 * Signals routed through interposer to MEC17xx ADC channels.
 */
const struct adc_t adc_channels[] = {
	/* Vref = 3.000V, 10-bit unsigned reading */
	[ADC_TEMP_SENSOR_CHARGER] = {
		"CHARGER", 3000, 1024, 0, 0
	},
	[ADC_TEMP_SENSOR_AMB] = {
		"AMBIENT", 3000, 1024, 0, 1
	},
	[ADC_BOARD_ID] = {
		"BRD_ID", 3000, 1024, 0, 2
	},
};
BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT);

/* PWM channels. Must be in the exactly same order as in enum pwm_channel. */
#ifdef CONFIG_PWM
const struct pwm_t pwm_channels[] = {
	/* channel, flags */
	[PWM_CH_LED_GREEN] = { 4, PWM_CONFIG_DSLEEP },
	[PWM_CH_LED_RED] =   { 5, PWM_CONFIG_DSLEEP },
};
BUILD_ASSERT(ARRAY_SIZE(pwm_channels) == PWM_CH_COUNT);
#endif /* #ifdef CONFIG_PWM */

/*
 * Using Ports 3, 6, 7 from board.h
 * Using Ports 0, 2 from board.c
 * Due to added RC of interposer board temporarily reduce
 * 400 to 100 kHz.
 */
const struct i2c_port_t i2c_ports[]  = {
	{"tcpc0",     MCHP_I2C_PORT0, 400,
		GPIO_EC_I2C_USB_C0_PD_SCL, GPIO_EC_I2C_USB_C0_PD_SDA},
	{"tcpc1",     MCHP_I2C_PORT2, 400,
		GPIO_EC_I2C_USB_C1_PD_SCL, GPIO_EC_I2C_USB_C1_PD_SDA},
	{"accelgyro", I2C_PORT_GYRO, 400,
		GPIO_EC_I2C_GYRO_SCL,      GPIO_EC_I2C_GYRO_SDA},
	{"sensors",   MCHP_I2C_PORT7, 400,
		GPIO_EC_I2C_SENSOR_SCL,    GPIO_EC_I2C_SENSOR_SDA},
	{"batt",      MCHP_I2C_PORT3, 100,
		GPIO_EC_I2C_POWER_SCL,     GPIO_EC_I2C_POWER_SDA},
};
const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports);

/*
 * Map ports to controller.
 * Ports may map to the same controller.
 * Both USB PD ports are mapped to CTRL0.
 */
const uint16_t i2c_port_to_ctrl[I2C_PORT_COUNT] = {
	(MCHP_I2C_CTRL0 << 8) + MCHP_I2C_PORT0,
	(MCHP_I2C_CTRL0 << 8) + MCHP_I2C_PORT2,
	(MCHP_I2C_CTRL1 << 8) + I2C_PORT_GYRO,
	(MCHP_I2C_CTRL2 << 8) + MCHP_I2C_PORT3,
	(MCHP_I2C_CTRL3 << 8) + MCHP_I2C_PORT7,
};

/*
 * Used by chip level I2C controller initialization.
 * Board level can specify two unused I2C addresses
 * for each controller. Current chip level disables
 * controller response to address 0(general call).
 */
const uint32_t i2c_ctrl_slave_addrs[I2C_CONTROLLER_COUNT] = {
	0, 0, 0, 0,
};

const struct charger_config_t chg_chips[] = {
	{
		.i2c_port = I2C_PORT_CHARGER,
		.i2c_addr_flags = BD9995X_ADDR_FLAGS,
		.drv = &bd9995x_drv,
	},
};

/* Return the two slave addresses the specified
 * controller will respond to when controller
 * is acting as a slave.
 * b[6:0]  = b[7:1] of I2C address 1
 * b[14:8] = b[7:1] of I2C address 2
 * When not using I2C controllers as slaves we can use
 * the same value for all controllers. The address should
 * not be 0x00 as this is the general call address.
 */
uint16_t board_i2c_slave_addrs(int controller)
{
	int i;

	for (i = 0; i < I2C_CONTROLLER_COUNT; i++)
		if ((i2c_ctrl_slave_addrs[i] & 0xffff) == controller)
			return (i2c_ctrl_slave_addrs[i] >> 16);

	return 0; /* general call address */
}

/*
 * default to I2C0 because callers may not check
 * return value if we returned an error code.
 */
int board_i2c_p2c(int port)
{
	int i;

	for (i = 0; i < I2C_PORT_COUNT; i++)
		if ((i2c_port_to_ctrl[i] & 0xFF) == port)
			return (int)(i2c_port_to_ctrl[i] >> 8);

	return -1;
}

#ifdef CONFIG_CMD_I2C_STRESS_TEST
struct i2c_stress_test i2c_stress_tests[] = {

#ifdef CONFIG_CMD_I2C_STRESS_TEST_TCPC
	{
		.port = MCHP_I2C_PORT0,
		.addr_flags = 0x28,
		.i2c_test = &anx74xx_i2c_stress_test_dev,
	},
#endif

#ifdef CONFIG_CMD_I2C_STRESS_TEST_TCPC
	{
		.port = MCHP_I2C_PORT2,
		.addr_flags = 0x0B,
		.i2c_test = &ps8xxx_i2c_stress_test_dev,
	},
#endif
#ifdef CONFIG_CMD_I2C_STRESS_TEST_ACCEL
	{
		.port = I2C_PORT_GYRO,
		.addr_flags = BMI160_ADDR0_FLAGS,
		.i2c_test = &bmi160_i2c_stress_test_dev,
	},
#endif
#ifdef CONFIG_CMD_I2C_STRESS_TEST_ACCEL
	{
		.port = I2C_PORT_BARO,
		.addr_flags = BMP280_I2C_ADDRESS1_FLAGS,
		.i2c_test = &bmp280_i2c_stress_test_dev,
	},
	{
		.port = I2C_PORT_LID_ACCEL,
		.addr_flags = KX022_ADDR1_FLAGS,
		.i2c_test = &kionix_i2c_stress_test_dev,
	},
#endif
#ifdef CONFIG_CMD_I2C_STRESS_TEST_ALS
	{
		.port = I2C_PORT_ALS,
		.addr_flags = OPT3001_I2C_ADDR1_FLAGS,
		.i2c_test = &opt3001_i2c_stress_test_dev,
	},
#endif
/* MCHP_I2C_PORT3 */
#ifdef CONFIG_CMD_I2C_STRESS_TEST_BATTERY
	{
		.i2c_test = &battery_i2c_stress_test_dev,
	},
#endif
/* MCHP_I2C_PORT3 */
#ifdef CONFIG_CMD_I2C_STRESS_TEST_CHARGER
	{
		.i2c_test = &bd9995x_i2c_stress_test_dev,
	},
#endif
};
const int i2c_test_dev_used = ARRAY_SIZE(i2c_stress_tests);
#endif /* CONFIG_CMD_I2C_STRESS_TEST */

const struct tcpc_config_t tcpc_config[CONFIG_USB_PD_PORT_MAX_COUNT] = {
	[USB_PD_PORT_ANX74XX] = {
		.bus_type = EC_BUS_TYPE_I2C,
		.i2c_info = {
			.port = MCHP_I2C_PORT0,
			.addr_flags = 0x28,
		},
		.drv = &anx74xx_tcpm_drv,
	},
	[USB_PD_PORT_PS8751] = {
		.bus_type = EC_BUS_TYPE_I2C,
		.i2c_info = {
			.port = MCHP_I2C_PORT2,
			.addr_flags = 0x0B,
		},
		.drv = &ps8xxx_tcpm_drv,
	},
};

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_C0_PD_RST_L))
			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 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);

/*
 * PS8751 TCPM DRP low power idle behavour is causing I2C errors.
 * Upon receiving DRP low power idle command, PS8751 holds SCL and
 * SDA low for ~480us. It simultaneously releases both pins which is
 * defined as a bus error condition by I2C spec. No ACK received.
 * TCPCI spec. states waking any TCPM requires sending any fake
 * I2C command which the TCPM will NACK. The I2C master MUST wait
 * a minimum of 5 ms after the NACK before sending another I2C
 * command. We observe the PD task and TCPCI state machines do not
 * follow the TCPCI spec. Sometimes this routine is called to wake
 * the PS8751 after it has been put into low power idle and sometimes
 * the PD/TCPCI state machine doesn't call this routine and tries
 * communicating with PS8751. This results in lots of I2C retries and
 * results taking up to 10ms before I2C communication with PS8751
 * is stable. Don't know how to fix this.
 */
static int ps8751_tune_mux(const struct usb_mux *me)
{
	int rv;

	/* 0x98 sets lower EQ of DP port (4.5db) */
	rv = mux_write(me, PS8XXX_REG_MUX_DP_EQ_CONFIGURATION, 0x98);

	/* TCPCI spec. delay msleep(6); */

	return rv;
}

/*
 * USB_PD_PORT_ANX74XX and USB_PD_PORT_PS8751 are zero based indices into
 * tcpc_config array. The tcpc_config array contains the actual EC I2C
 * port, device slave address, and a function pointer into the driver code.
 */
const struct usb_mux usb_muxes[CONFIG_USB_PD_PORT_MAX_COUNT] = {
	[USB_PD_PORT_ANX74XX] = {
		.usb_port = USB_PD_PORT_ANX74XX,
		.driver = &anx74xx_tcpm_usb_mux_driver,
		.hpd_update = &anx74xx_tcpc_update_hpd_status,
	},
	[USB_PD_PORT_PS8751] = {
		.usb_port = USB_PD_PORT_PS8751,
		.driver = &tcpci_tcpm_usb_mux_driver,
		.hpd_update = &ps8xxx_tcpc_update_hpd_status,
		.board_init = &ps8751_tune_mux,
	}
};

/* MCHP
 * New, not in firmware-reef-9042.B
 */
const int usb_port_enable[CONFIG_USB_PORT_POWER_SMART_PORT_COUNT] = {
	GPIO_USB1_ENABLE,
};

/**
 * Power on (or off) a single TCPC.
 * minimum on/off delays are included.
 *
 * @param port	Port number of TCPC.
 * @param mode	0: power off, 1: power on.
 */
void board_set_tcpc_power_mode(int port, int mode)
{
	if (port != USB_PD_PORT_ANX74XX)
		return;

	switch (mode) {
	case ANX74XX_NORMAL_MODE:
		gpio_set_level(GPIO_EN_USB_TCPC_PWR, 1);
		msleep(ANX74XX_PWR_H_RST_H_DELAY_MS);
		gpio_set_level(GPIO_USB_C0_PD_RST_L, 1);
		break;
	case ANX74XX_STANDBY_MODE:
		gpio_set_level(GPIO_USB_C0_PD_RST_L, 0);
		msleep(ANX74XX_RST_L_PWR_L_DELAY_MS);
		gpio_set_level(GPIO_EN_USB_TCPC_PWR, 0);
		msleep(ANX74XX_PWR_L_PWR_H_DELAY_MS);
		break;
	default:
		break;
	}
}

/**
 * Reset all system PD/TCPC MCUs -- currently only called from
 * handle_pending_reboot() in common/power.c just before hard
 * resetting the system. This logic is likely not needed as the
 * PP3300_A rail should be dropped on EC reset.
 */
void board_reset_pd_mcu(void)
{
	/* Assert reset to TCPC1 */
	gpio_set_level(GPIO_USB_C1_PD_RST_ODL, 0);

	/* Assert reset to TCPC0 (anx3429) */
	gpio_set_level(GPIO_USB_C0_PD_RST_L, 0);
	/* TCPC1 (ps8751) requires 1ms reset down assertion */
	msleep(MAX(1, ANX74XX_RST_L_PWR_L_DELAY_MS));

	/* Deassert reset to TCPC1 */
	gpio_set_level(GPIO_USB_C1_PD_RST_ODL, 1);
	/* Disable TCPC0 power */
	gpio_set_level(GPIO_EN_USB_TCPC_PWR, 0);

	/*
	 * anx3429 requires 10ms reset/power down assertion
	 */
	msleep(ANX74XX_PWR_L_PWR_H_DELAY_MS);
	board_set_tcpc_power_mode(USB_PD_PORT_ANX74XX, 1);
}

void board_tcpc_init(void)
{
	int reg;

	/* Only reset TCPC if not sysjump */
	if (!system_jumped_late())
		board_reset_pd_mcu();

	/*
	 * TODO: Remove when Reef is updated with PS8751 A3.
	 *
	 * Force PS8751 A2 to wake from low power mode.
	 * If PS8751 remains in low power mode after sysjump,
	 * TCPM_INIT will fail due to not able to access PS8751.
	 *
	 * NOTE: PS8751 A3 will wake on any I2C access.
	 */
	reg = 0;
	/* TODO MCHP:
	 * PS8751 is at I2C address 0x16. Original reef using
	 * address 0x10. Is this another attempt at waking PS8751
	 * from DRP low power idle mode?
	 */
	i2c_read8(MCHP_I2C_PORT2, 0x08, 0xA0, &reg);

	/* Enable TCPC0 interrupt */
	gpio_enable_interrupt(GPIO_USB_C0_PD_INT_ODL);

	/* Enable TCPC1 interrupt */
	gpio_enable_interrupt(GPIO_USB_C1_PD_INT_ODL);

#ifdef CONFIG_USB_PD_TCPC_LOW_POWER
	/* Enable CABLE_DET interrupt for ANX3429 wake from standby */
	gpio_enable_interrupt(GPIO_USB_C0_CABLE_DET);
#endif
	/*
	 * 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);

/*
 * Data derived from Seinhart-Hart equation in a resistor divider circuit with
 * Vdd=3300mV, R = 13.7Kohm, and Murata NCP15WB-series thermistor (B = 4050,
 * T0 = 298.15, nominal resistance (R0) = 47Kohm).
 */
#define CHARGER_THERMISTOR_SCALING_FACTOR 13
static const struct thermistor_data_pair charger_thermistor_data[] = {
	{ 3044 / CHARGER_THERMISTOR_SCALING_FACTOR, 0 },
	{ 2890 / CHARGER_THERMISTOR_SCALING_FACTOR, 10 },
	{ 2680 / CHARGER_THERMISTOR_SCALING_FACTOR, 20 },
	{ 2418 / CHARGER_THERMISTOR_SCALING_FACTOR, 30 },
	{ 2117 / CHARGER_THERMISTOR_SCALING_FACTOR, 40 },
	{ 1800 / CHARGER_THERMISTOR_SCALING_FACTOR, 50 },
	{ 1490 / CHARGER_THERMISTOR_SCALING_FACTOR, 60 },
	{ 1208 / CHARGER_THERMISTOR_SCALING_FACTOR, 70 },
	{ 966 / CHARGER_THERMISTOR_SCALING_FACTOR, 80 },
	{ 860 / CHARGER_THERMISTOR_SCALING_FACTOR, 85 },
	{ 766 / CHARGER_THERMISTOR_SCALING_FACTOR, 90 },
	{ 679 / CHARGER_THERMISTOR_SCALING_FACTOR, 95 },
	{ 603 / CHARGER_THERMISTOR_SCALING_FACTOR, 100 },
};

static const struct thermistor_info charger_thermistor_info = {
	.scaling_factor = CHARGER_THERMISTOR_SCALING_FACTOR,
	.num_pairs = ARRAY_SIZE(charger_thermistor_data),
	.data = charger_thermistor_data,
};

int board_get_charger_temp(int idx, int *temp_ptr)
{
	int mv = adc_read_channel(MCHP_ADC_CH(0));

	if (mv < 0)
		return -1;

	*temp_ptr = thermistor_linear_interpolate(mv,
		&charger_thermistor_info);
	*temp_ptr = C_TO_K(*temp_ptr);
	return 0;
}

/*
 * Data derived from Seinhart-Hart equation in a resistor divider circuit with
 * Vdd=3300mV, R = 51.1Kohm, and Murata NCP15WB-series thermistor (B = 4050,
 * T0 = 298.15, nominal resistance (R0) = 47Kohm).
 */
#define AMB_THERMISTOR_SCALING_FACTOR 11
static const struct thermistor_data_pair amb_thermistor_data[] = {
	{ 2512 / AMB_THERMISTOR_SCALING_FACTOR, 0 },
	{ 2158 / AMB_THERMISTOR_SCALING_FACTOR, 10 },
	{ 1772 / AMB_THERMISTOR_SCALING_FACTOR, 20 },
	{ 1398 / AMB_THERMISTOR_SCALING_FACTOR, 30 },
	{ 1070 / AMB_THERMISTOR_SCALING_FACTOR, 40 },
	{ 803 / AMB_THERMISTOR_SCALING_FACTOR, 50 },
	{ 597 / AMB_THERMISTOR_SCALING_FACTOR, 60 },
	{ 443 / AMB_THERMISTOR_SCALING_FACTOR, 70 },
	{ 329 / AMB_THERMISTOR_SCALING_FACTOR, 80 },
	{ 285 / AMB_THERMISTOR_SCALING_FACTOR, 85 },
	{ 247 / AMB_THERMISTOR_SCALING_FACTOR, 90 },
	{ 214 / AMB_THERMISTOR_SCALING_FACTOR, 95 },
	{ 187 / AMB_THERMISTOR_SCALING_FACTOR, 100 },
};

static const struct thermistor_info amb_thermistor_info = {
	.scaling_factor = AMB_THERMISTOR_SCALING_FACTOR,
	.num_pairs = ARRAY_SIZE(amb_thermistor_data),
	.data = amb_thermistor_data,
};

int board_get_ambient_temp(int idx, int *temp_ptr)
{
	int mv = adc_read_channel(MCHP_ADC_CH(1));

	if (mv < 0)
		return -1;

	*temp_ptr = thermistor_linear_interpolate(mv,
		&amb_thermistor_info);
	*temp_ptr = C_TO_K(*temp_ptr);
	return 0;
}

/*
 * name, sensor type, read function,
 * index of sensor passed to read function,
 * delay from read to taking action
 */
const struct temp_sensor_t temp_sensors[] = {
	{"Battery", TEMP_SENSOR_TYPE_BATTERY, charge_get_battery_temp, 0},
	{"Ambient", TEMP_SENSOR_TYPE_BOARD, board_get_ambient_temp, 0},
	{"Charger", TEMP_SENSOR_TYPE_BOARD, board_get_charger_temp, 1},
};
BUILD_ASSERT(ARRAY_SIZE(temp_sensors) == TEMP_SENSOR_COUNT);

/* Called by APL power state machine when transitioning from G3 to S5 */
void chipset_pre_init_callback(void)
{
	/*
	 * No need to re-init PMIC since settings are sticky across sysjump.
	 * However, be sure to check that PMIC is already enabled. If it is
	 * then there's no need to re-sequence the PMIC.
	 */
	if (system_jumped_to_this_image() && gpio_get_level(GPIO_PMIC_EN))
		return;

	/* Enable PP5000 before PP3300 due to NFC: chrome-os-partner:50807 */
	gpio_set_level(GPIO_EN_PP5000, 1);
	while (!gpio_get_level(GPIO_PP5000_PG))
		;

	/*
	 * To prevent SLP glitches, PMIC_EN (V5A_EN) should be enabled
	 * at the same time as PP3300 (chrome-os-partner:51323).
	 */
	/* Enable 3.3V rail */
	gpio_set_level(GPIO_EN_PP3300, 1);
	while (!gpio_get_level(GPIO_PP3300_PG))
		;

	/* Enable PMIC */
	gpio_set_level(GPIO_PMIC_EN, 1);
}

static void board_set_tablet_mode(void)
{
	tablet_set_mode(!gpio_get_level(GPIO_TABLET_MODE_L));
}

/* Initialize board. */
static void board_init(void)
{
	/* Ensure tablet mode is initialized according to the hardware state
	 * so that the cached state reflects reality.
	 */
	board_set_tablet_mode();

	gpio_enable_interrupt(GPIO_TABLET_MODE_L);

	/* Enable charger interrupts */
	gpio_enable_interrupt(GPIO_CHARGER_INT_L);

	/* Enable Gyro interrupts */
	gpio_enable_interrupt(GPIO_BASE_SIXAXIS_INT_L);
}
/* PP3300 needs to be enabled before TCPC init hooks */
DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_FIRST);

/*
 * MCHP - new version of this routine.
 * firmware-reef-9042.B must do port lookup here
 * before calling bd9995x_is_vbus_provided
 */
int pd_snk_is_vbus_provided(int port)
{
	if (port != 0 && port != 1)
		panic("Invalid charge port\n");

	return bd9995x_is_vbus_provided(port);
}

/**
 * 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)
{
	enum bd9995x_charge_port bd9995x_port;
	int bd9995x_port_select = 1;

	switch (charge_port) {
	case USB_PD_PORT_ANX74XX:
	case USB_PD_PORT_PS8751:
		/* Don't charge from a source port */
		if (board_vbus_source_enabled(charge_port))
			return -1;

		bd9995x_port = charge_port;
		break;
	case CHARGE_PORT_NONE:
		bd9995x_port_select = 0;
		bd9995x_port = BD9995X_CHARGE_PORT_BOTH;

		/*
		 * To avoid inrush current from the external charger, enable
		 * discharge on AC till the new charger is detected and
		 * charge detect delay has passed.
		 */
		if (charge_get_percent() > 2)
			charger_discharge_on_ac(1);
		break;
	default:
		panic("Invalid charge port\n");
		break;
	}

	CPRINTS("New chg p%d", charge_port);
	return bd9995x_select_input_port(bd9995x_port, bd9995x_port_select);
}

/**
 * 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)
{
	/* Enable charging trigger by BC1.2 detection */
	int bc12_enable = (supplier == CHARGE_SUPPLIER_BC12_CDP ||
			   supplier == CHARGE_SUPPLIER_BC12_DCP ||
			   supplier == CHARGE_SUPPLIER_BC12_SDP ||
			   supplier == CHARGE_SUPPLIER_OTHER);

	if (bd9995x_bc12_enable_charging(port, bc12_enable))
		return;

	charge_ma = (charge_ma * 95) / 100;
	charge_set_input_current_limit(MAX(charge_ma,
			CONFIG_CHARGER_INPUT_CURRENT), charge_mv);
}

/**
 * Return if board is consuming full amount of input current
 */
int board_is_consuming_full_charge(void)
{
	int chg_perc = charge_get_percent();

	return chg_perc > 2 && chg_perc < 95;
}

/**
 * Return if VBUS is sagging too low
 */
int board_is_vbus_too_low(int port, enum chg_ramp_vbus_state ramp_state)
{
	int voltage;

	if (charger_get_vbus_voltage(port, &voltage))
		voltage = 0;

	return voltage < BD9995X_BC12_MIN_VOLTAGE;
}

static void enable_input_devices(void)
{
	/* We need to turn on tablet mode for motion sense */
	board_set_tablet_mode();

	/* Then, we disable peripherals only when the lid reaches 360 position.
	 * (It's probably already disabled by motion_sense_task.)
	 * We deliberately do not enable peripherals when the lid is leaving
	 * 360 position. Instead, we let motion_sense_task enable it once it
	 * reaches laptop zone (180 or less).
	 */
	if (tablet_get_mode())
		lid_angle_peripheral_enable(0);
}

/* 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

/* Called on AP S5 -> S3 transition */
static void board_chipset_startup(void)
{
	/* Enable USB-A port. */
	gpio_set_level(GPIO_USB1_ENABLE, 1);

	/* Enable Trackpad */
	gpio_set_level(GPIO_EN_P3300_TRACKPAD_ODL, 0);

	hook_call_deferred(&enable_input_devices_data, 0);
}
DECLARE_HOOK(HOOK_CHIPSET_STARTUP, board_chipset_startup, HOOK_PRIO_DEFAULT);

/* Called on AP S3 -> S5 transition */
static void board_chipset_shutdown(void)
{
	/* Disable USB-A port. */
	gpio_set_level(GPIO_USB1_ENABLE, 0);

	/* Disable Trackpad */
	gpio_set_level(GPIO_EN_P3300_TRACKPAD_ODL, 1);

	hook_call_deferred(&enable_input_devices_data, 0);
	/* FIXME(dhendrix): Drive USB_PD_RST_ODL low to prevent
	 * leakage? (see comment in schematic)
	 */
}
DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, board_chipset_shutdown, HOOK_PRIO_DEFAULT);

/* FIXME(dhendrix): Add CHIPSET_RESUME and CHIPSET_SUSPEND
 * hooks to enable/disable sensors?
 */
/*
 * MCHP: Next two routines not present in firmware-reef-9042.B
 */
/* Called on AP S3 -> S0 transition */
static void board_chipset_resume(void)
{
	gpio_set_level(GPIO_ENABLE_BACKLIGHT, 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);
}
DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, board_chipset_suspend, HOOK_PRIO_DEFAULT);

/*
 * FIXME(dhendrix): Weak symbol hack until we can get a better solution for
 * both Amenia and Reef.
 */
void chipset_do_shutdown(void)
{
	/* Disable PMIC */
	gpio_set_level(GPIO_PMIC_EN, 0);

	/*Disable 3.3V rail */
	gpio_set_level(GPIO_EN_PP3300, 0);
	while (gpio_get_level(GPIO_PP3300_PG))
		;

	/*Disable 5V rail */
	gpio_set_level(GPIO_EN_PP5000, 0);
	while (gpio_get_level(GPIO_PP5000_PG))
		;
}

void board_hibernate_late(void)
{
	int i;
	const uint32_t hibernate_pins[][2] = {
		/* Turn off LEDs in hibernate */
		{GPIO_BAT_LED_BLUE, GPIO_INPUT | GPIO_PULL_UP},
		{GPIO_BAT_LED_AMBER, GPIO_INPUT | GPIO_PULL_UP},
		{GPIO_LID_OPEN, GPIO_INT_RISING | GPIO_PULL_DOWN},

		/*
		 * BD99956 handles charge input automatically. We'll disable
		 * charge output in hibernate. Charger will assert ACOK_OD
		 * when VBUS or VCC are plugged in.
		 */
		{GPIO_USB_C0_5V_EN,       GPIO_INPUT  | GPIO_PULL_DOWN},
		{GPIO_USB_C1_5V_EN,       GPIO_INPUT  | GPIO_PULL_DOWN},
	};

	/* Change GPIOs' state in hibernate for better power consumption */
	for (i = 0; i < ARRAY_SIZE(hibernate_pins); ++i)
		gpio_set_flags(hibernate_pins[i][0], hibernate_pins[i][1]);

	gpio_config_module(MODULE_KEYBOARD_SCAN, 0);

	/*
	 * Calling gpio_config_module sets disabled alternate function pins to
	 * GPIO_INPUT.  But to prevent keypresses causing leakage currents
	 * while hibernating we want to enable GPIO_PULL_UP as well.
	 */
	gpio_set_flags_by_mask(0x2, 0x03, GPIO_INPUT | GPIO_PULL_UP);
	gpio_set_flags_by_mask(0x1, 0x7F, GPIO_INPUT | GPIO_PULL_UP);
	gpio_set_flags_by_mask(0x0, 0xE0, GPIO_INPUT | GPIO_PULL_UP);
	/* KBD_KSO2 needs to have a pull-down enabled instead of pull-up */
	gpio_set_flags_by_mask(0x1, 0x80, GPIO_INPUT | GPIO_PULL_DOWN);
}

/* Motion sensors */
/* Mutexes */
static struct mutex g_lid_mutex;
static struct mutex g_base_mutex;

/* Matrix to rotate accelrator 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)}
};

const mat33_fp_t mag_standard_ref = {
	{ FLOAT_TO_FP(-1), 0, 0},
	{ 0,  FLOAT_TO_FP(1), 0},
	{ 0, 0, FLOAT_TO_FP(-1)}
};

/* sensor private data */
static struct kionix_accel_data g_kx022_data;
static struct bmi_drv_data_t g_bmi160_data;
static struct bmp280_drv_data_t bmp280_drv_data;
/* MCHP: struct not present in firmware-reef-9042.B */
static struct opt3001_drv_data_t g_opt3001_data = {
	.scale = 1,
	.uscale = 0,
	.offset = 0,
};

/* MCHP: differences in structure initializatio from
 * firmware-reef-9042.B
 */
/* FIXME(dhendrix): Copied from Amenia, probably need to tweak for Reef */
struct motion_sensor_t motion_sensors[] = {
	[LID_ACCEL] = {
	 .name = "Lid Accel",
	 .active_mask = SENSOR_ACTIVE_S0_S3,
	 .chip = MOTIONSENSE_CHIP_KX022,
	 .type = MOTIONSENSE_TYPE_ACCEL,
	 .location = MOTIONSENSE_LOC_LID,
	 .drv = &kionix_accel_drv,
	 .mutex = &g_lid_mutex,
	 .drv_data = &g_kx022_data,
	 .port = I2C_PORT_LID_ACCEL,
	 .i2c_spi_addr_flags = KX022_ADDR1_FLAGS,
	 .rot_standard_ref = NULL, /* Identity matrix. */
	 .default_range = 2, /* g, to support lid angle calculation. */
	 .min_frequency = KX022_ACCEL_MIN_FREQ,
	 .max_frequency = KX022_ACCEL_MAX_FREQ,
	 .config = {
		/* EC use accel for angle detection */
		[SENSOR_CONFIG_EC_S0] = {
			.odr = 10000 | ROUND_UP_FLAG,
		},
		 /* Sensor on for lid angle detection */
		[SENSOR_CONFIG_EC_S3] = {
			.odr = 10000 | ROUND_UP_FLAG,
		},
	 },
	},

	[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_GYRO,
	 .i2c_spi_addr_flags = BMI160_ADDR0_FLAGS,
	 .rot_standard_ref = &base_standard_ref,
	 .default_range = 4,  /* g, to meet CDD 7.3.1/C-1-4 reqs */
	 .min_frequency = BMI_ACCEL_MIN_FREQ,
	 .max_frequency = BMI_ACCEL_MAX_FREQ,
	 .config = {
		 /* EC use accel for angle detection */
		 [SENSOR_CONFIG_EC_S0] = {
			.odr = 10000 | ROUND_UP_FLAG,
			.ec_rate = 100 * MSEC,
		 },
		 /* Sensor on for lid angle detection */
		 [SENSOR_CONFIG_EC_S3] = {
			.odr = 10000 | ROUND_UP_FLAG,
			.ec_rate = 100 * MSEC,
		 },
	 },
	},

	[BASE_GYRO] = {
	 .name = "Base Gyro",
	 .active_mask = SENSOR_ACTIVE_S0,
	 .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_GYRO,
	 .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,
	},
	[BASE_MAG] = {
	 .name = "Base Mag",
	 .active_mask = SENSOR_ACTIVE_S0,
	 .chip = MOTIONSENSE_CHIP_BMI160,
	 .type = MOTIONSENSE_TYPE_MAG,
	 .location = MOTIONSENSE_LOC_BASE,
	 .drv = &bmi160_drv,
	 .mutex = &g_base_mutex,
	 .drv_data = &g_bmi160_data,
	 .port = I2C_PORT_GYRO,
	 .i2c_spi_addr_flags = BMI160_ADDR0_FLAGS,
	 .default_range = BIT(11), /* 16LSB / uT, fixed */
	 .rot_standard_ref = &mag_standard_ref,
	 .min_frequency = BMM150_MAG_MIN_FREQ,
	 .max_frequency = BMM150_MAG_MAX_FREQ(SPECIAL),
	},
	[BASE_BARO] = {
	 .name = "Base Baro",
	 .active_mask = SENSOR_ACTIVE_S0,
	 .chip = MOTIONSENSE_CHIP_BMP280,
	 .type = MOTIONSENSE_TYPE_BARO,
	 .location = MOTIONSENSE_LOC_BASE,
	 .drv = &bmp280_drv,
	 .drv_data = &bmp280_drv_data,
	 .port = I2C_PORT_BARO,
	 .i2c_spi_addr_flags = BMP280_I2C_ADDRESS1_FLAGS,
	 .default_range = BIT(18), /*  1bit = 4 Pa, 16bit ~= 2600 hPa */
	 .min_frequency = BMP280_BARO_MIN_FREQ,
	 .max_frequency = BMP280_BARO_MAX_FREQ,
	},
	[LID_ALS] = {
	 .name = "Light",
	 .active_mask = SENSOR_ACTIVE_S0_S3,
	 .chip = MOTIONSENSE_CHIP_OPT3001,
	 .type = MOTIONSENSE_TYPE_LIGHT,
	 .location = MOTIONSENSE_LOC_LID,
	 .drv = &opt3001_drv,
	 .drv_data = &g_opt3001_data,
	 .port = I2C_PORT_ALS,
	 .i2c_spi_addr_flags = OPT3001_I2C_ADDR1_FLAGS,
	 .rot_standard_ref = NULL,
	 .default_range = 0x10000, /* scale = 1; uscale = 0 */
	 .min_frequency = OPT3001_LIGHT_MIN_FREQ,
	 .max_frequency = OPT3001_LIGHT_MAX_FREQ,
	 .config = {
		[SENSOR_CONFIG_EC_S0] = {
			.odr = 1000,
		},
	 },
	},
};
const unsigned int motion_sensor_count = ARRAY_SIZE(motion_sensors);

/*
 * MCHP: difference from firmware-reef-9042.B
 * New code doesn't have TASK_ALS
 */
/* ALS instances when LPC mapping is needed. Each entry directs to a sensor. */
const struct motion_sensor_t *motion_als_sensors[] = {
	&motion_sensors[LID_ALS],
};
BUILD_ASSERT(ARRAY_SIZE(motion_als_sensors) == ALS_COUNT);

void board_hibernate(void)
{
	/*
	 * To support hibernate called from console commands, ectool commands
	 * and key sequence, shutdown the AP before hibernating.
	 */
	chipset_do_shutdown();

	/* Added delay to allow AP to settle down */
	msleep(100);

	/* Enable both the VBUS & VCC ports before entering PG3 */
	bd9995x_select_input_port(BD9995X_CHARGE_PORT_BOTH, 1);

	/* Turn BGATE OFF for saving the power */
	bd9995x_set_power_save_mode(BD9995X_PWR_SAVE_MAX);
}

struct {
	enum reef_board_version version;
	int thresh_mv;
} const reef_board_versions[] = {
	/* Vin = 3.3V, R1 = 46.4K, R2 values listed below */
	{ BOARD_VERSION_1, 328 * 1.03 },  /* 5.11 Kohm */
	{ BOARD_VERSION_2, 670 * 1.03 },  /* 11.8 Kohm */
	{ BOARD_VERSION_3, 1012 * 1.03 }, /* 20.5 Kohm */
	{ BOARD_VERSION_4, 1357 * 1.03 }, /* 32.4 Kohm */
	{ BOARD_VERSION_5, 1690 * 1.03 }, /* 48.7 Kohm */
	{ BOARD_VERSION_6, 2020 * 1.03 }, /* 73.2 Kohm */
	{ BOARD_VERSION_7, 2352 * 1.03 }, /* 115 Kohm */
	{ BOARD_VERSION_8, 2802 * 1.03 }, /* 261 Kohm */
};
BUILD_ASSERT(ARRAY_SIZE(reef_board_versions) == BOARD_VERSION_COUNT);

/*
 * Checkpatch claims msleep(n) for n < 20 can sleep up to 20 ms.
 * Loop up to 10 times sampling every 100 us. If 5 or more consecutive
 * samples are the same exit sample loop.
 */
int board_get_version(void)
{
	static int version = BOARD_VERSION_UNKNOWN;
	int mv, i, prev, cnt;

	if (version != BOARD_VERSION_UNKNOWN)
		return version;

	/* FIXME(dhendrix): enable ADC */
	gpio_set_flags(GPIO_EC_BRD_ID_EN_ODL, GPIO_ODR_HIGH);
	gpio_set_level(GPIO_EC_BRD_ID_EN_ODL, 0);
	/* Wait to allow cap charge */
	prev = 0;
	cnt = 0;
	for (i = 0; i < 10; i++) {
		udelay(100);
		mv = adc_read_channel(ADC_BOARD_ID);
		if (mv != prev) {
			prev = mv;
			cnt = 0;
		} else {
			cnt++;
		}
		if (cnt >= 5)
			break;
	}
	/* FIXME(dhendrix): disable ADC */
	gpio_set_level(GPIO_EC_BRD_ID_EN_ODL, 1);
	gpio_set_flags(GPIO_EC_BRD_ID_EN_ODL, GPIO_INPUT);

	if (mv == ADC_READ_ERROR) {
		version = BOARD_VERSION_UNKNOWN;
		return version;
	}

	for (i = 0; i < BOARD_VERSION_COUNT; i++) {
		if (mv < reef_board_versions[i].thresh_mv) {
			version = reef_board_versions[i].version;
			break;
		}
	}

	CPRINTS("Board version: %d", version);
	return version;
}

/* Keyboard scan setting */
struct keyboard_scan_config keyscan_config = {
	/*
	 * F3 key scan cycle completed but scan input is not
	 * charging to logic high when EC start scan next
	 * column for "T" key, so we set .output_settle_us
	 * to 80us from 50us.
	 */
	.output_settle_us = 80,
	.debounce_down_us = 9 * MSEC,
	.debounce_up_us = 30 * MSEC,
	.scan_period_us = 3 * MSEC,
	.min_post_scan_delay_us = 1000,
	.poll_timeout_us = 100 * MSEC,
	.actual_key_mask = {
		0x14, 0xff, 0xff, 0xff, 0xff, 0xf5, 0xff,
		0xa4, 0xff, 0xfe, 0x55, 0xfa, 0xca  /* full set */
	},
};
