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/* Copyright 2015 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.
*
* Power and battery LED control.
*/
#include "battery.h"
#include "charge_state.h"
#include "chipset.h"
#include "ec_commands.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "led_common.h"
#include "util.h"
#define BAT_LED_ON 1
#define BAT_LED_OFF 0
const enum ec_led_id supported_led_ids[] = {
EC_LED_ID_BATTERY_LED};
const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
enum led_color {
LED_OFF = 0,
LED_AMBER,
LED_WHITE,
LED_COLOR_COUNT /* Number of colors, not a color itself */
};
static int bat_led_set_color(enum led_color color)
{
switch (color) {
case LED_OFF:
gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_OFF);
gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_OFF);
break;
case LED_AMBER:
gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_ON);
gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_OFF);
break;
case LED_WHITE:
gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_OFF);
gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_ON);
break;
default:
return EC_ERROR_UNKNOWN;
}
return EC_SUCCESS;
}
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
brightness_range[EC_LED_COLOR_YELLOW] = 1;
brightness_range[EC_LED_COLOR_WHITE] = 1;
}
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
switch (led_id) {
case EC_LED_ID_BATTERY_LED:
if (brightness[EC_LED_COLOR_WHITE] != 0)
bat_led_set_color(LED_WHITE);
else if (brightness[EC_LED_COLOR_YELLOW] != 0)
bat_led_set_color(LED_AMBER);
else
bat_led_set_color(LED_OFF);
break;
default:
break;
}
return EC_SUCCESS;
}
static void board_led_set_battery(void)
{
static int battery_ticks;
uint32_t chflags = charge_get_flags();
static int power_ticks;
static int previous_state_suspend;
battery_ticks++;
power_ticks++;
if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND)) {
/*
* Reset ticks if entering suspend so LED turns white
* as soon as possible.
*/
if (!previous_state_suspend)
power_ticks = 0;
if (charge_get_state() == PWR_STATE_CHARGE)
/* Always indicate when charging, even in suspend. */
bat_led_set_color(LED_AMBER);
else
/* Blink once every one second. */
bat_led_set_color((power_ticks & 0x4) ?
LED_WHITE : LED_OFF);
previous_state_suspend = 1;
return;
}
previous_state_suspend = 0;
switch (charge_get_state()) {
case PWR_STATE_CHARGE:
bat_led_set_color(LED_AMBER);
break;
case PWR_STATE_DISCHARGE:
if (charge_get_percent() < 12)
bat_led_set_color(
(battery_ticks & 0x4) ? LED_WHITE : LED_OFF);
else
bat_led_set_color(LED_OFF);
break;
case PWR_STATE_ERROR:
bat_led_set_color((battery_ticks & 0x2) ? LED_WHITE : LED_OFF);
break;
case PWR_STATE_CHARGE_NEAR_FULL:
bat_led_set_color(LED_WHITE);
break;
case PWR_STATE_IDLE: /* External power connected in IDLE */
if (chflags & CHARGE_FLAG_FORCE_IDLE)
bat_led_set_color(
(battery_ticks & 0x4) ? LED_AMBER : LED_OFF);
else
bat_led_set_color(LED_WHITE);
break;
default:
/* Other states don't alter LED behavior */
break;
}
}
/* Called by hook task every TICK */
static void led_tick(void)
{
if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
board_led_set_battery();
}
DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
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