path: root/board/scarlet/board.c

/* 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.
 */

#include "adc.h"
#include "adc_chip.h"
#include "backlight.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 "ec_commands.h"
#include "driver/accelgyro_bmi160.h"
#include "driver/charger/rt946x.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)
{
#ifdef HAS_TASK_PDCMD
	/* Exchange status with TCPCs */
	host_command_pd_send_status(PD_CHARGE_NO_CHANGE);
#endif
}

static void overtemp_interrupt(enum gpio_signal signal)
{
	CPRINTS("AP wants shutdown");
	chipset_force_shutdown();
}

static void warm_reset_request_interrupt(enum gpio_signal signal)
{
	CPRINTS("AP wants warm reset");
	chipset_reset(0);
}

#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", 3300, 4096, 0, STM32_AIN(10)},
};
BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT);

/******************************************************************************/
/* I2C ports */
const struct i2c_port_t i2c_ports[] = {
	{"charger", I2C_PORT_CHARGER,   400, GPIO_I2C0_SCL, GPIO_I2C0_SDA},
	{"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 },
};
const unsigned int spi_devices_used = ARRAY_SIZE(spi_devices);

/******************************************************************************/
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] = {
	{
		.port_addr = 0,
		.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)
{
	CPRINTS("New chg p%d", charge_port);

	switch (charge_port) {
	case 0:
		/* Don't charge from a source port */
		if (board_vbus_source_enabled(charge_port))
			return -1;
		break;
	case CHARGE_PORT_NONE:
		/*
		 * To ensure the fuel gauge (max17055) is always powered
		 * even when battery is disconnected, keep VBAT rail on but
		 * set the charging current to minimum.
		 */
		charger_set_current(0);
		break;
	default:
		panic("Invalid charge port\n");
		break;
	}

	return EC_SUCCESS;
}

void board_set_charge_limit(int port, int supplier, int charge_ma,
			    int max_ma, int charge_mv)
{
	charge_set_input_current_limit(MAX(charge_ma,
			       CONFIG_CHARGER_INPUT_CURRENT), charge_mv);
}

int extpower_is_present(void)
{
	/*
	 * The charger will indicate VBUS presence if we're sourcing 5V,
	 * so exclude such ports.
	 */
	if (board_vbus_source_enabled(0))
		return 0;
	else
		return tcpm_get_vbus_level(0);
}

int pd_snk_is_vbus_provided(int port)
{
	if (port)
		panic("Invalid charge port\n");

	return rt946x_is_vbus_ready();
}

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 charger interrupts */
	gpio_enable_interrupt(GPIO_CHARGER_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
	 * Ch6: SPI2_RX / Ch7: SPI2_TX
	 */
	STM32_DMA_CSELR(STM32_DMAC_CH4) = (1 << 15) | (1 << 19) |
					  (1 << 20) | (1 << 21) |
					  (1 << 24) | (1 << 25);
}

enum scarlet_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 scarlet_board_version version;
	int expect_mv;
} const scarlet_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(scarlet_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 < scarlet_boards[i].expect_mv + THRESHOLD_MV) {
			version = scarlet_boards[i].version;
			break;
		}
	}

	/*
	 * Disable ADC module after we detect the board version,
	 * since this is the only thing ADC module needs to do
	 * for this board.
	 */
	if (version != BOARD_VERSION_UNKNOWN)
		adc_disable();

	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 matrix_3x3_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.
	 */
	[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 = 4,  /* g */
	 .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,
	},
};
const unsigned int motion_sensor_count = ARRAY_SIZE(motion_sensors);
#endif /* defined(HAS_TASK_MOTIONSENSE) */

int board_allow_i2c_passthru(int port)
{
	return (port == I2C_PORT_VIRTUAL_BATTERY);
}

int tablet_get_mode(void)
{
	/* Always in tablet mode */
	return 1;
}

void usb_charger_set_switches(int port, enum usb_switch setting)
{
	/*
	 * There is no USB2 switch anywhere on this board. But based
	 * on the discussion in b:65446459, RK3399's USB PHY is powered
	 * off when USB charging port detection is going on, so things
	 * should mostly work without a USB2 switch.
	 */
}