/* Copyright 2019 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.
 */

/* Trogdor board-specific configuration */

#include "adc_chip.h"
#include "button.h"
#include "charge_manager.h"
#include "charge_state.h"
#include "extpower.h"
#include "driver/accelgyro_bmi_common.h"
#include "driver/ppc/sn5s330.h"
#include "driver/tcpm/ps8xxx.h"
#include "driver/tcpm/tcpci.h"
#include "gpio.h"
#include "hooks.h"
#include "lid_switch.h"
#if BOARD_REV >= TROGDOR_REV1
#include "pi3usb9201.h"
#else
#include "pi3usb9281.h"
#endif /* BOARD_REV */
#include "power.h"
#include "power_button.h"
#include "pwm.h"
#include "pwm_chip.h"
#include "system.h"
#include "shi_chip.h"
#include "switch.h"
#include "task.h"
#include "usbc_ppc.h"

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

/* Forward declaration */
static void tcpc_alert_event(enum gpio_signal signal);
static void usb0_evt(enum gpio_signal signal);
static void usb1_evt(enum gpio_signal signal);
static void ppc_interrupt(enum gpio_signal signal);
static void board_connect_c0_sbu(enum gpio_signal s);

#include "gpio_list.h"

/* GPIO Interrupt Handlers */
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);
}

static void usb0_evt(enum gpio_signal signal)
{
	task_set_event(TASK_ID_USB_CHG_P0, USB_CHG_EVENT_BC12, 0);
}

static void usb1_evt(enum gpio_signal signal)
{
	task_set_event(TASK_ID_USB_CHG_P1, USB_CHG_EVENT_BC12, 0);
}

static void ppc_interrupt(enum gpio_signal signal)
{
	switch (signal) {
	case GPIO_USB_C0_SWCTL_INT_ODL:
		sn5s330_interrupt(0);
		break;
	case GPIO_USB_C1_SWCTL_INT_ODL:
		sn5s330_interrupt(1);
		break;
	default:
		break;
	}
}

static void board_connect_c0_sbu_deferred(void)
{
	/*
	 * If CCD_MODE_ODL asserts, it means there's a debug accessory connected
	 * and we should enable the SBU FETs.
	 */
	ppc_set_sbu(0, 1);
}
DECLARE_DEFERRED(board_connect_c0_sbu_deferred);

static void board_connect_c0_sbu(enum gpio_signal s)
{
	hook_call_deferred(&board_connect_c0_sbu_deferred_data, 0);
}

/* ADC channels */
const struct adc_t adc_channels[] = {
	/* Measure VBUS through a 1/10 voltage divider */
	[ADC_VBUS] = {
		"VBUS",
		NPCX_ADC_CH1,
		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_CH2,
		ADC_MAX_VOLT * 1000 / 18,
		ADC_READ_MAX + 1,
		0
	},
	/*
	 * ISL9238 PSYS output is 1.44 uA/W over 5.6K resistor, to read
	 * 0.8V @ 99 W, i.e. 124000 uW/mV. Using ADC_MAX_VOLT*124000 and
	 * ADC_READ_MAX+1 as multiplier/divider leads to overflows, so we
	 * only divide by 2 (enough to avoid precision issues).
	 */
	[ADC_PSYS] = {
		"PSYS",
		NPCX_ADC_CH3,
		ADC_MAX_VOLT * 124000 * 2 / (ADC_READ_MAX + 1),
		2,
		0
	},
};
BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT);

const struct pwm_t pwm_channels[] = {
	[PWM_CH_KBLIGHT] = { .channel = 3, .flags = 0, .freq = 10000 },
	/* TODO(waihong): Assign a proper frequency. */
	[PWM_CH_DISPLIGHT] = { .channel = 5, .flags = 0, .freq = 4800 },
};
BUILD_ASSERT(ARRAY_SIZE(pwm_channels) == PWM_CH_COUNT);

/* Power Path Controller */
struct ppc_config_t ppc_chips[] = {
	{
		.i2c_port = I2C_PORT_TCPC0,
		.i2c_addr_flags = SN5S330_ADDR0_FLAGS,
		.drv = &sn5s330_drv
	},
	{
		.i2c_port = I2C_PORT_TCPC1,
		.i2c_addr_flags = SN5S330_ADDR0_FLAGS,
		.drv = &sn5s330_drv
	},
};
unsigned int ppc_cnt = ARRAY_SIZE(ppc_chips);

/* TCPC mux configuration */
const struct tcpc_config_t tcpc_config[CONFIG_USB_PD_PORT_MAX_COUNT] = {
	{
		.bus_type = EC_BUS_TYPE_I2C,
		.i2c_info = {
			.port = I2C_PORT_TCPC0,
			.addr_flags = PS8751_I2C_ADDR1_FLAGS,
		},
		.drv = &ps8xxx_tcpm_drv,
	},
	{
		.bus_type = EC_BUS_TYPE_I2C,
		.i2c_info = {
			.port = I2C_PORT_TCPC1,
			.addr_flags = PS8751_I2C_ADDR1_FLAGS,
		},
		.drv = &ps8xxx_tcpm_drv,
	},
};

/*
 * Port-0/1 USB mux driver.
 *
 * The USB mux is handled by TCPC chip and the HPD update is through a GPIO
 * to AP. But the TCPC chip is also needed to know the HPD status; otherwise,
 * the mux misbehaves.
 */
const struct usb_mux usb_muxes[CONFIG_USB_PD_PORT_MAX_COUNT] = {
	{
		.usb_port = 0,
		.driver = &tcpci_tcpm_usb_mux_driver,
		.hpd_update = &ps8xxx_tcpc_update_hpd_status,
	},
	{
		.usb_port = 1,
		.driver = &tcpci_tcpm_usb_mux_driver,
		.hpd_update = &ps8xxx_tcpc_update_hpd_status,
	}
};

const int usb_port_enable[USB_PORT_COUNT] = {
	GPIO_EN_USB_A_5V,
};

/* BC1.2 */
#if BOARD_REV >= TROGDOR_REV1
const struct pi3usb9201_config_t pi3usb9201_bc12_chips[] = {
	{
		.i2c_port = I2C_PORT_POWER,
		.i2c_addr_flags = PI3USB9201_I2C_ADDR_3_FLAGS,
	},
	{
		.i2c_port = I2C_PORT_EEPROM,
		.i2c_addr_flags = PI3USB9201_I2C_ADDR_3_FLAGS,
	},
};
#else
struct pi3usb9281_config pi3usb9281_chips[] = {
	{
		.i2c_port = I2C_PORT_POWER,
	},
	{
		.i2c_port = I2C_PORT_EEPROM,
	},
};
BUILD_ASSERT(ARRAY_SIZE(pi3usb9281_chips) ==
	     CONFIG_BC12_DETECT_PI3USB9281_CHIP_COUNT);
#endif /* BOARD_REV */

/* Initialize board. */
static void board_init(void)
{
	/* Enable BC1.2 VBUS detection */
	gpio_enable_interrupt(GPIO_USB_C0_VBUS_DET_L);
	gpio_enable_interrupt(GPIO_USB_C1_VBUS_DET_L);

	/* Enable BC1.2 interrupts */
	gpio_enable_interrupt(GPIO_USB_C0_BC12_INT_L);
	gpio_enable_interrupt(GPIO_USB_C1_BC12_INT_L);

	/* Enable interrupt for BMI160 sensor */
	gpio_enable_interrupt(GPIO_ACCEL_GYRO_INT_L);

	/*
	 * The H1 SBU line for CCD are behind PPC chip. The PPC internal FETs
	 * for SBU may be disconnected after DP alt mode is off. Should enable
	 * the CCD_MODE_ODL interrupt to make sure the SBU FETs are connected.
	 */
	gpio_enable_interrupt(GPIO_CCD_MODE_ODL);
}
DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);

void board_tcpc_init(void)
{
	/* Only reset TCPC if not sysjump */
	if (!system_jumped_late()) {
		/* TODO(crosbug.com/p/61098): How long do we need to wait? */
		board_reset_pd_mcu();
	}

	/* Enable PPC interrupts */
	gpio_enable_interrupt(GPIO_USB_C0_SWCTL_INT_ODL);

	/* 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);

/* Called on AP S0 -> S3 transition */
static void board_chipset_suspend(void)
{
	/*
	 * Turn off display backlight in S3. AP has its own control. The EC's
	 * and the AP's will be AND'ed together in hardware.
	 */
	gpio_set_level(GPIO_ENABLE_BACKLIGHT, 0);
	pwm_enable(PWM_CH_DISPLIGHT, 0);

	/* Disable the keyboard backlight */
	pwm_enable(PWM_CH_KBLIGHT, 0);
}
DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, board_chipset_suspend, HOOK_PRIO_DEFAULT);

/* Called on AP S3 -> S0 transition */
static void board_chipset_resume(void)
{
	/* Turn on display and keyboard backlight in S0. */
	gpio_set_level(GPIO_ENABLE_BACKLIGHT, 1);
	pwm_enable(PWM_CH_DISPLIGHT, 1);
	pwm_enable(PWM_CH_KBLIGHT, 1);
}
DECLARE_HOOK(HOOK_CHIPSET_RESUME, board_chipset_resume, HOOK_PRIO_DEFAULT);

void board_reset_pd_mcu(void)
{
	cprints(CC_USB, "Resetting TCPCs...");
	cflush();

	gpio_set_level(GPIO_USB_C0_PD_RST_L, 0);
	gpio_set_level(GPIO_USB_C1_PD_RST_ODL, 0);
	msleep(PS8XXX_RESET_DELAY_MS);
	gpio_set_level(GPIO_USB_C0_PD_RST_L, 1);
	gpio_set_level(GPIO_USB_C1_PD_RST_ODL, 1);
	msleep(PS8805_FW_INIT_DELAY_MS);
}

void board_set_tcpc_power_mode(int port, int mode)
{
	/* Ignore the "mode" to turn the chip on.  We can only do a reset. */
	if (mode)
		return;

	board_reset_pd_mcu();
}

int board_vbus_sink_enable(int port, int enable)
{
	/* Both ports are controlled by PPC SN5S330 */
	return ppc_vbus_sink_enable(port, enable);
}

int board_is_sourcing_vbus(int port)
{
	/* Both ports are controlled by PPC SN5S330 */
	return ppc_is_sourcing_vbus(port);
}

void board_overcurrent_event(int port, int is_overcurrented)
{
	/* TODO(b/120231371): Notify AP */
	CPRINTS("p%d: overcurrent!", port);
}

int board_set_active_charge_port(int port)
{
	int is_real_port = (port >= 0 &&
			    port < CONFIG_USB_PD_PORT_MAX_COUNT);
	int i;

	if (!is_real_port && port != CHARGE_PORT_NONE)
		return EC_ERROR_INVAL;

	if (port == CHARGE_PORT_NONE) {
		CPRINTS("Disabling all charging port");

		/* Disable all ports. */
		for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++) {
			/*
			 * Do not return early if one fails otherwise we can
			 * get into a boot loop assertion failure.
			 */
			if (board_vbus_sink_enable(i, 0))
				CPRINTS("Disabling p%d sink path failed.", i);
		}

		return EC_SUCCESS;
	}

	/* Check if the port is sourcing VBUS. */
	if (board_is_sourcing_vbus(port)) {
		CPRINTS("Skip enable p%d", port);
		return EC_ERROR_INVAL;
	}


	CPRINTS("New charge port: p%d", port);

	/*
	 * Turn off the other ports' sink path FETs, before enabling the
	 * requested charge port.
	 */
	for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++) {
		if (i == port)
			continue;

		if (board_vbus_sink_enable(i, 0))
			CPRINTS("p%d: sink path disable failed.", i);
	}

	/* Enable requested charge port. */
	if (board_vbus_sink_enable(port, 1)) {
		CPRINTS("p%d: sink path enable failed.", port);
		return EC_ERROR_UNKNOWN;
	}

	return EC_SUCCESS;
}

void board_set_charge_limit(int port, int supplier, int charge_ma,
			    int max_ma, int charge_mv)
{
	/*
	 * Ignore lower charge ceiling on PD transition if our battery is
	 * critical, as we may brownout.
	 */
	if (supplier == CHARGE_SUPPLIER_PD &&
	    charge_ma < 1500 &&
	    charge_get_percent() < CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON) {
		CPRINTS("Using max ilim %d", max_ma);
		charge_ma = max_ma;
	}

	charge_set_input_current_limit(MAX(charge_ma,
					   CONFIG_CHARGER_INPUT_CURRENT),
				       charge_mv);
}

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;
}

/* Mutexes */
static struct mutex g_base_mutex;

static struct bmi_drv_data_t g_bmi160_data;

/* Matrix to rotate accelerometer 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)}
};

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.
	 */
	[BASE_ACCEL] = {
	 .name = "Base Accel",
	 .active_mask = SENSOR_ACTIVE_S0_S3_S5,
	 .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_SENSOR,
	 .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 = {
		 [SENSOR_CONFIG_EC_S0] = {
			 .odr = 10000 | ROUND_UP_FLAG,
		 },
	 },
	},
	[BASE_GYRO] = {
	 .name = "Gyro",
	 .active_mask = SENSOR_ACTIVE_S0_S3_S5,
	 .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_SENSOR,
	 .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);