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/* Copyright 2017 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_manager.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 "system.h"
#include "util.h"
#define BAT_LED_ON 1
#define BAT_LED_OFF 0
#define LED_TOTAL_TICKS 16
#define LED_ON_TICKS 8
const enum ec_led_id supported_led_ids[] = {
EC_LED_ID_POWER_LED,
EC_LED_ID_BATTERY_LED};
const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
enum led_color {
LED_OFF = 0,
LED_RED,
LED_GREEN,
LED_BLUE,
/* Number of colors, not a color itself */
LED_COLOR_COUNT
};
/**
* Set LED color
*
* @param color Enumerated color value
*/
static void set_color(enum led_color color)
{
gpio_set_level(GPIO_POWER_LED, !(color == LED_BLUE));
gpio_set_level(GPIO_LED_ACIN, !(color == LED_GREEN));
gpio_set_level(GPIO_LED_CHARGE, !(color == LED_RED));
}
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
brightness_range[EC_LED_COLOR_RED] = 1;
brightness_range[EC_LED_COLOR_BLUE] = 1;
brightness_range[EC_LED_COLOR_GREEN] = 1;
}
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
gpio_set_level(GPIO_POWER_LED, !brightness[EC_LED_COLOR_BLUE]);
gpio_set_level(GPIO_LED_ACIN, !brightness[EC_LED_COLOR_GREEN]);
gpio_set_level(GPIO_LED_CHARGE, !brightness[EC_LED_COLOR_RED]);
return EC_SUCCESS;
}
static void nautilus_led_set_power_battery(void)
{
static unsigned int power_ticks;
enum led_color cur_led_color = LED_RED;
enum charge_state chg_state = charge_get_state();
int charge_percent = charge_get_percent();
if (chipset_in_state(CHIPSET_STATE_ON)) {
set_color(LED_BLUE);
return;
}
/* Flash red on critical battery, which usually inhibits AP power-on. */
if (battery_is_present() != BP_YES ||
charge_percent < CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON) {
set_color(((power_ticks++ % LED_TOTAL_TICKS) < LED_ON_TICKS) ?
LED_RED : LED_OFF);
return;
}
/* CHIPSET_STATE_OFF */
switch (chg_state) {
case PWR_STATE_DISCHARGE:
if ((charge_get_flags() & CHARGE_FLAG_EXTERNAL_POWER) &&
charge_percent >= BATTERY_LEVEL_NEAR_FULL)
cur_led_color = LED_GREEN;
else
cur_led_color = LED_OFF;
break;
case PWR_STATE_CHARGE:
cur_led_color = LED_RED;
break;
case PWR_STATE_ERROR:
cur_led_color = ((power_ticks++ % LED_TOTAL_TICKS)
< LED_ON_TICKS) ? LED_RED : LED_GREEN;
break;
case PWR_STATE_CHARGE_NEAR_FULL:
case PWR_STATE_IDLE:
if(charge_get_flags() & CHARGE_FLAG_EXTERNAL_POWER)
cur_led_color = LED_GREEN;
else
cur_led_color = LED_OFF;
break;
default:
cur_led_color = LED_RED;
break;
}
set_color(cur_led_color);
if (chg_state != PWR_STATE_ERROR)
power_ticks = 0;
}
/**
* Called by hook task every 250 ms
*/
static void led_tick(void)
{
if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED) &&
led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED)) {
nautilus_led_set_power_battery();
}
}
DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
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