/* Copyright 2021 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.
 */

/* Brya specific PWM LED settings: there are 2 LEDs on each side of the board,
 * each one can be controlled separately. The LED colors are white or amber,
 * and the default behavior is tied to the charging process: both sides are
 * amber while charging the battery and white when the battery is charged.
 */

#include <stdint.h>

#include "common.h"
#include "compile_time_macros.h"
#include "ec_commands.h"
#include "led_pwm.h"
#include "pwm.h"
#include "util.h"

const enum ec_led_id supported_led_ids[] = {
	EC_LED_ID_LEFT_LED,
	EC_LED_ID_RIGHT_LED,
};

const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);

/*
 * We only have a white and an amber LED, so setting any other color results in
 * both LEDs being off. Cap at 50% to save power.
 */
struct pwm_led_color_map led_color_map[EC_LED_COLOR_COUNT] = {
				/* Amber, White */
	[EC_LED_COLOR_RED]    = {   0,   0 },
	[EC_LED_COLOR_GREEN]  = {   0,   0 },
	[EC_LED_COLOR_BLUE]   = {   0,   0 },
	[EC_LED_COLOR_YELLOW] = {   0,   0 },
	[EC_LED_COLOR_WHITE]  = {   0,  50 },
	[EC_LED_COLOR_AMBER]  = {  50,   0 },
};

/* Two logical LEDs with amber and white channels. */
struct pwm_led pwm_leds[CONFIG_LED_PWM_COUNT] = {
	{
		.ch0 = PWM_CH_LED1,
		.ch1 = PWM_CH_LED2,
		.ch2 = PWM_LED_NO_CHANNEL,
		.enable = &pwm_enable,
		.set_duty = &pwm_set_duty,
	},
	{
		.ch0 = PWM_CH_LED3,
		.ch1 = PWM_CH_LED4,
		.ch2 = PWM_LED_NO_CHANNEL,
		.enable = &pwm_enable,
		.set_duty = &pwm_set_duty,
	},
};

void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
	memset(brightness_range, '\0',
	       sizeof(*brightness_range) * EC_LED_COLOR_COUNT);
	brightness_range[EC_LED_COLOR_AMBER] = 100;
	brightness_range[EC_LED_COLOR_WHITE] = 100;
}

int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
	enum pwm_led_id pwm_id;

	/* Convert ec_led_id to pwm_led_id. */
	switch (led_id) {
	case EC_LED_ID_LEFT_LED:
		pwm_id = PWM_LED0;
		break;
	case EC_LED_ID_RIGHT_LED:
		pwm_id = PWM_LED1;
		break;
	default:
		return EC_ERROR_UNKNOWN;
	}

	if (brightness[EC_LED_COLOR_WHITE])
		set_pwm_led_color(pwm_id, EC_LED_COLOR_WHITE);
	else if (brightness[EC_LED_COLOR_AMBER])
		set_pwm_led_color(pwm_id, EC_LED_COLOR_AMBER);
	else
		/* Otherwise, the "color" is "off". */
		set_pwm_led_color(pwm_id, -1);

	return EC_SUCCESS;
}
