/* Copyright (c) 2012 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.
 */
/* Spring board-specific configuration */

#include "adc.h"
#include "chipset.h"
#include "common.h"
#include "console.h"
#include "dma.h"
#include "ec_commands.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "i2c.h"
#include "lp5562.h"
#include "pmu_tpschrome.h"
#include "registers.h"
#include "smart_battery.h"
#include "stm32_adc.h"
#include "timer.h"
#include "util.h"

#define GPIO_KB_INPUT  (GPIO_INPUT | GPIO_PULL_UP | GPIO_INT_BOTH)
#define GPIO_KB_OUTPUT (GPIO_OUTPUT | GPIO_OPEN_DRAIN)

#define INT_BOTH_FLOATING	(GPIO_INPUT | GPIO_INT_BOTH)
#define INT_BOTH_PULL_UP	(GPIO_INPUT | GPIO_PULL_UP | GPIO_INT_BOTH)

#define HARD_RESET_TIMEOUT_MS 5

/* We use yellow LED instead of blue LED. Re-map colors here. */
#define LED_COLOR_GREEN  LP5562_COLOR_GREEN
#define LED_COLOR_YELLOW LP5562_COLOR_BLUE
#define LED_COLOR_RED    LP5562_COLOR_RED

/* GPIO interrupt handlers prototypes */
#ifndef CONFIG_TASK_GAIAPOWER
#define gaia_power_event NULL
#define gaia_suspend_event NULL
#define gaia_lid_event NULL
#else
void gaia_power_event(enum gpio_signal signal);
void gaia_suspend_event(enum gpio_signal signal);
void gaia_lid_event(enum gpio_signal signal);
#endif
#ifndef CONFIG_TASK_KEYSCAN
#define matrix_interrupt NULL
#endif
void usb_charge_interrupt(enum gpio_signal signal);

/* GPIO signal list.  Must match order from enum gpio_signal. */
const struct gpio_info gpio_list[GPIO_COUNT] = {
	/* Inputs with interrupt handlers are first for efficiency */
	{"KB_PWR_ON_L", GPIO_B, (1<<5),  GPIO_INT_BOTH, gaia_power_event},
	{"PP1800_LDO2", GPIO_A, (1<<1),  GPIO_INT_BOTH, gaia_power_event},
	{"XPSHOLD",     GPIO_A, (1<<3),  GPIO_INT_BOTH, gaia_power_event},
	{"CHARGER_INT", GPIO_C, (1<<4),  GPIO_INT_FALLING, pmu_irq_handler},
	{"LID_OPEN",    GPIO_C, (1<<13), GPIO_INT_RISING, gaia_lid_event},
	{"SUSPEND_L",   GPIO_A, (1<<7),  INT_BOTH_FLOATING, gaia_suspend_event},
	{"WP_L",        GPIO_A, (1<<13), GPIO_INPUT, NULL},
	{"KB_IN00",     GPIO_C, (1<<8),  GPIO_KB_INPUT, matrix_interrupt},
	{"KB_IN01",     GPIO_C, (1<<9),  GPIO_KB_INPUT, matrix_interrupt},
	{"KB_IN02",     GPIO_C, (1<<10), GPIO_KB_INPUT, matrix_interrupt},
	{"KB_IN03",     GPIO_C, (1<<11), GPIO_KB_INPUT, matrix_interrupt},
	{"KB_IN04",     GPIO_C, (1<<12), GPIO_KB_INPUT, matrix_interrupt},
	{"KB_IN05",     GPIO_C, (1<<14), GPIO_KB_INPUT, matrix_interrupt},
	{"KB_IN06",     GPIO_C, (1<<15), GPIO_KB_INPUT, matrix_interrupt},
	{"KB_IN07",     GPIO_D, (1<<2),  GPIO_KB_INPUT, matrix_interrupt},
	{"USB_CHG_INT", GPIO_A, (1<<6),  GPIO_INT_FALLING,
		usb_charge_interrupt},
	/* Other inputs */
	{"BCHGR_VACG",  GPIO_A, (1<<0), GPIO_INT_BOTH, NULL},
	/*
	 * I2C pins should be configured as inputs until I2C module is
	 * initialized. This will avoid driving the lines unintentionally.
	 */
	{"I2C1_SCL",    GPIO_B, (1<<6),  GPIO_INPUT, NULL},
	{"I2C1_SDA",    GPIO_B, (1<<7),  GPIO_INPUT, NULL},
	{"I2C2_SCL",    GPIO_B, (1<<10), GPIO_INPUT, NULL},
	{"I2C2_SDA",    GPIO_B, (1<<11), GPIO_INPUT, NULL},
	/* Outputs */
	{"EN_PP1350",   GPIO_A, (1<<14), GPIO_OUT_LOW, NULL},
	{"EN_PP5000",   GPIO_A, (1<<11),  GPIO_OUT_LOW, NULL},
	{"EN_PP3300",   GPIO_A, (1<<8),  GPIO_OUT_LOW, NULL},
	{"PMIC_PWRON_L",GPIO_A, (1<<12), GPIO_OUT_HIGH, NULL},
	{"PMIC_RESET",  GPIO_A, (1<<15), GPIO_OUT_LOW, NULL},
	{"ENTERING_RW", GPIO_D, (1<<0),  GPIO_OUT_LOW, NULL},
	{"CHARGER_EN",  GPIO_B, (1<<2),  GPIO_OUT_LOW, NULL},
	{"EC_INT",      GPIO_B, (1<<9),  GPIO_HI_Z, NULL},
	{"CODEC_INT",   GPIO_D, (1<<1),  GPIO_HI_Z, NULL},
	{"KB_OUT00",    GPIO_B, (1<<0),  GPIO_KB_OUTPUT, NULL},
	{"KB_OUT01",    GPIO_B, (1<<8),  GPIO_KB_OUTPUT, NULL},
	{"KB_OUT02",    GPIO_B, (1<<12), GPIO_KB_OUTPUT, NULL},
	{"KB_OUT03",    GPIO_B, (1<<13), GPIO_KB_OUTPUT, NULL},
	{"KB_OUT04",    GPIO_B, (1<<14), GPIO_KB_OUTPUT, NULL},
	{"KB_OUT05",    GPIO_B, (1<<15), GPIO_KB_OUTPUT, NULL},
	{"KB_OUT06",    GPIO_C, (1<<0),  GPIO_KB_OUTPUT, NULL},
	{"KB_OUT07",    GPIO_C, (1<<1),  GPIO_KB_OUTPUT, NULL},
	{"KB_OUT08",    GPIO_C, (1<<2),  GPIO_KB_OUTPUT, NULL},
	{"KB_OUT09",    GPIO_B, (1<<1),  GPIO_KB_OUTPUT, NULL},
	{"KB_OUT10",    GPIO_C, (1<<5),  GPIO_KB_OUTPUT, NULL},
	{"KB_OUT11",    GPIO_C, (1<<6),  GPIO_KB_OUTPUT, NULL},
	{"KB_OUT12",    GPIO_C, (1<<7),  GPIO_KB_OUTPUT, NULL},
	{"BOOST_EN",    GPIO_B, (1<<3),  GPIO_OUT_HIGH, NULL},
	{"ILIM",	GPIO_B, (1<<4),  GPIO_OUT_LOW, NULL},
};

/* ADC channels */
const struct adc_t adc_channels[ADC_CH_COUNT] = {
	/*
	 * VBUS voltage sense pin.
	 * Sense pin 3.3V is converted to 4096. Accounting for the 2x
	 * voltage divider, the conversion factor is 6600mV/4096.
	 */
	[ADC_CH_USB_VBUS_SNS] = {"USB_VBUS_SNS", 6600, 4096, 0, STM32_AIN(5)},
	/* Micro USB D+ sense pin. Converted to mV (3300mV/4096). */
	[ADC_CH_USB_DP_SNS] = {"USB_DP_SNS", 3300, 4096, 0, STM32_AIN(2)},
	/* Micro USB D- sense pin. Converted to mV (3300mV/4096). */
	[ADC_CH_USB_DN_SNS] = {"USB_DN_SNS", 3300, 4096, 0, STM32_AIN(4)},
};

void configure_board(void)
{
	uint32_t val;

	dma_init();

	/* Enable all GPIOs clocks
	 * TODO: more fine-grained enabling for power saving
	 */
	STM32_RCC_APB2ENR |= 0x1fd;

	/* remap OSC_IN/OSC_OUT to PD0/PD1 */
	STM32_GPIO_AFIO_MAPR |= 1 << 15;

	/*
	 * use PA13, PA14, PA15, PB3, PB4 as a GPIO,
	 * so disable JTAG and SWD
	 */
	STM32_GPIO_AFIO_MAPR = (STM32_GPIO_AFIO_MAPR & ~(0x7 << 24))
			       | (4 << 24);

	/* remap TIM3_CH1 to PB4 */
	STM32_GPIO_AFIO_MAPR = (STM32_GPIO_AFIO_MAPR & ~(0x3 << 10))
			       | (2 << 10);

	/* Analog input for ADC pins (PA2, PA4, PA5) */
	STM32_GPIO_CRL_OFF(GPIO_A) &= ~0x00ff0f00;

	/*
	 * Set alternate function for USART1. For alt. function input
	 * the port is configured in either floating or pull-up/down
	 * input mode (ref. section 7.1.4 in datasheet RM0041):
	 * PA9:  Tx, alt. function output
	 * PA10: Rx, input with pull-down
	 *
	 * note: see crosbug.com/p/12223 for more info
	 */
	val = STM32_GPIO_CRH_OFF(GPIO_A) & ~0x00000ff0;
	val |= 0x00000890;
	STM32_GPIO_CRH_OFF(GPIO_A) = val;

	/* EC_INT is output, open-drain */
	val = STM32_GPIO_CRH_OFF(GPIO_B) & ~0xf0;
	val |= 0x50;
	STM32_GPIO_CRH_OFF(GPIO_B) = val;
	/* put GPIO in Hi-Z state */
	gpio_set_level(GPIO_EC_INT, 1);
}

/* GPIO configuration to be done after I2C module init */
void board_i2c_post_init(int port)
{
	uint32_t val;

	/* enable alt. function (open-drain) */
	if (port == STM32_I2C1_PORT) {
		/* I2C1 is on PB6-7 */
		val = STM32_GPIO_CRL_OFF(GPIO_B) & ~0xff000000;
		val |= 0xdd000000;
		STM32_GPIO_CRL_OFF(GPIO_B) = val;
	} else if (port == STM32_I2C2_PORT) {
		/* I2C2 is on PB10-11 */
		val = STM32_GPIO_CRH_OFF(GPIO_B) & ~0x0000ff00;
		val |= 0x0000dd00;
		STM32_GPIO_CRH_OFF(GPIO_B) = val;
	}
}

void board_interrupt_host(int active)
{
	/* interrupt host by using active low EC_INT signal */
	gpio_set_level(GPIO_EC_INT, !active);
}

void board_keyboard_suppress_noise(void)
{
	/* notify audio codec of keypress for noise suppression */
	gpio_set_level(GPIO_CODEC_INT, 0);
	gpio_set_level(GPIO_CODEC_INT, 1);
}

static void board_startup_hook(void)
{
	gpio_set_flags(GPIO_SUSPEND_L, INT_BOTH_PULL_UP);

#ifdef CONFIG_PMU_FORCE_FET
	/* Enable 3G modem power */
	pmu_enable_fet(FET_WWAN, 1, NULL);
#endif /* CONFIG_PMU_FORCE_FET */
}
DECLARE_HOOK(HOOK_CHIPSET_STARTUP, board_startup_hook, HOOK_PRIO_DEFAULT);

static void board_shutdown_hook(void)
{
#ifdef CONFIG_PMU_FORCE_FET
	/* Power off backlight power */
	pmu_enable_fet(FET_BACKLIGHT, 0, NULL);
	/* Power off lcd panel */
	pmu_enable_fet(FET_LCD_PANEL, 0, NULL);
#endif /* CONFIG_PMU_FORCE_FET */

	/* Disable pull-up on SUSPEND_L during shutdown to prevent leakage */
	gpio_set_flags(GPIO_SUSPEND_L, INT_BOTH_FLOATING);
}
DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, board_shutdown_hook, HOOK_PRIO_DEFAULT);

/*
 * Force the pmic to reset completely.  This forces an entire system reset,
 * and therefore should never return
 */
void board_hard_reset(void)
{
	/* Force a hard reset of tps Chrome */
	gpio_set_level(GPIO_PMIC_RESET, 1);

	/* Delay while the power is cut */
	udelay(HARD_RESET_TIMEOUT_MS * 1000);

	/* Shouldn't get here unless the board doesn't have this capability */
	panic_puts("Hard reset failed! (this board may not be capable)\n");
}

#ifdef CONFIG_PMU_BOARD_INIT

/**
 * Initialize PMU register settings
 *
 * PMU init settings depend on board configuration. This function should be
 * called inside PMU init function.
 */
int board_pmu_init(void)
{
	int failure = 0;

	/* Set fast charging timeout to 6 hours*/
	if (!failure)
		failure = pmu_set_fastcharge(TIMEOUT_6HRS);
	/* Enable external gpio CHARGER_EN control */
	if (!failure)
		failure = pmu_enable_ext_control(1);
	/* Disable force charging */
	if (!failure)
		failure = pmu_enable_charger(0);

	/* Set NOITERM bit */
	if (!failure)
		failure = pmu_low_current_charging(1);

	/*
	 * High temperature charging
	 *   termination voltage: 2.1V
	 *   termination current: 100%
	 */
	if (!failure)
		failure = pmu_set_term_voltage(RANGE_T34, TERM_V2100);
	if (!failure)
		failure = pmu_set_term_current(RANGE_T34, TERM_I1000);
	/*
	 * Standard temperature charging
	 *   termination voltage: 2.1V
	 *   termination current: 100%
	 */
	if (!failure)
		failure = pmu_set_term_voltage(RANGE_T23, TERM_V2100);
	if (!failure)
		failure = pmu_set_term_current(RANGE_T23, TERM_I1000);

	return failure ? EC_ERROR_UNKNOWN : EC_SUCCESS;
}
#endif /* CONFIG_BOARD_PMU_INIT */

int board_get_ac(void)
{
	/* UVLO is 4.1V. We consider AC bad when its voltage drops below 4.3V */
	return gpio_get_level(GPIO_BOOST_EN) &&
	       adc_read_channel(ADC_CH_USB_VBUS_SNS) >= 4300;
}

int board_battery_led(enum charging_state state)
{
	int current;
	int desired_current;
	uint32_t color = LED_COLOR_RED;

	/*
	 * LED power is controlled by accessory detection. We only
	 * set color here.
	 */
	switch (state) {
	case ST_IDLE:
		color = LED_COLOR_GREEN;
		break;
	case ST_DISCHARGING: /* Battery assist */
	case ST_PRE_CHARGING:
		color = LED_COLOR_YELLOW;
		break;
	case ST_CHARGING:
		if (battery_current(&current) ||
		    battery_desired_current(&desired_current)) {
			/* Cannot talk to the battery. Set LED to red. */
			color = LED_COLOR_RED;
			break;
		}
		if (current && desired_current)
			color = LED_COLOR_YELLOW;
		else
			color = LED_COLOR_GREEN;
		break;
	case ST_CHARGING_ERROR:
		color = LED_COLOR_RED;
		break;
	}

	return lp5562_set_color(color);
}

/*****************************************************************************/
/* Host commands */

static int power_command_info(struct host_cmd_handler_args *args)
{
	struct ec_response_power_info *r = args->response;

	r->voltage_ac = adc_read_channel(ADC_CH_USB_VBUS_SNS);
	r->voltage_system = pmu_adc_read(ADC_VAC, ADC_FLAG_KEEP_ON)
			  * 17000 / 1024;
	r->current_system = pmu_adc_read(ADC_IAC, 0)
			  * 20 * 33 / 1024;
	r->usb_dev_type = board_get_usb_dev_type();
	r->usb_current_limit = board_get_usb_current_limit();
	args->response_size = sizeof(*r);

	return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_POWER_INFO, power_command_info, EC_VER_MASK(0));