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/* 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.
*
* 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"
#include "extpower.h"
#define LED_ONE_SEC (1000 / HOOK_TICK_INTERVAL_MS)
/* Battery LED blinks every per 400ms */
#define LED_HALF_ONE_SEC (500 / HOOK_TICK_INTERVAL_MS)
#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_RED,
LED_GREEN,
LED_AMBER,
LED_COLOR_COUNT /* Number of colors, not a color itself */
};
static void led_set_color(enum led_color color)
{
gpio_set_level(GPIO_EC_CHG_LED_R_C0,
(color == LED_RED) ? BAT_LED_ON : BAT_LED_OFF);
gpio_set_level(GPIO_EC_CHG_LED_G_C0,
(color == LED_GREEN) ? BAT_LED_ON : BAT_LED_OFF);
if (color == LED_AMBER) {
gpio_set_level(GPIO_EC_CHG_LED_R_C0, BAT_LED_ON);
gpio_set_level(GPIO_EC_CHG_LED_G_C0, BAT_LED_ON);
}
}
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_GREEN] = 1;
brightness_range[EC_LED_COLOR_AMBER] = 1;
}
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
if (brightness[EC_LED_COLOR_RED] != 0)
led_set_color(LED_RED);
else if (brightness[EC_LED_COLOR_GREEN] != 0)
led_set_color(LED_GREEN);
else if (brightness[EC_LED_COLOR_AMBER] != 0)
led_set_color(LED_AMBER);
else
led_set_color(LED_OFF);
return EC_SUCCESS;
}
static void board_led_set_battery(void)
{
static int battery_ticks;
int color = LED_OFF;
int period = 0;
int percent = DIV_ROUND_NEAREST(charge_get_display_charge(), 10);
uint32_t chflags = charge_get_flags();
battery_ticks++;
switch (charge_get_state()) {
case PWR_STATE_CHARGE:
case PWR_STATE_CHARGE_NEAR_FULL:
if (chipset_in_state(CHIPSET_STATE_ON |
CHIPSET_STATE_ANY_SUSPEND |
CHIPSET_STATE_ANY_OFF)) {
if (percent <= BATTERY_LEVEL_CRITICAL) {
/* battery capa <= 5%, Red */
color = LED_RED;
} else if (percent > BATTERY_LEVEL_CRITICAL &&
percent < BATTERY_LEVEL_NEAR_FULL) {
/* 5% < battery capa < 97%, Orange */
color = LED_AMBER;
} else {
/* battery capa >= 97%, Green */
color = LED_GREEN;
}
}
break;
case PWR_STATE_DISCHARGE:
/* Always indicate off on when discharging */
color = LED_OFF;
break;
case PWR_STATE_ERROR:
/* Battery error, Red on 1sec off 1sec */
period = (1 + 1) * LED_ONE_SEC;
battery_ticks = battery_ticks % period;
if (battery_ticks < 1 * LED_ONE_SEC)
color = LED_RED;
else
color = LED_OFF;
break;
case PWR_STATE_IDLE: /* External power connected in IDLE */
if (chflags & CHARGE_FLAG_FORCE_IDLE) {
/* Factory mode, Red 2 sec, green 2 sec */
period = (2 + 2) * LED_ONE_SEC;
battery_ticks = battery_ticks % period;
if (battery_ticks < 2 * LED_ONE_SEC)
color = LED_RED;
else
color = LED_GREEN;
} else
color = LED_RED;
break;
default:
/* Other states don't alter LED behavior */
break;
}
led_set_color(color);
}
/* 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);
void led_control(enum ec_led_id led_id, enum ec_led_state state)
{
enum led_color color;
if ((led_id != EC_LED_ID_RECOVERY_HW_REINIT_LED) &&
(led_id != EC_LED_ID_SYSRQ_DEBUG_LED))
return;
if (state == LED_STATE_RESET) {
led_auto_control(EC_LED_ID_BATTERY_LED, 1);
board_led_set_battery();
return;
}
color = state ? LED_RED : LED_OFF;
led_auto_control(EC_LED_ID_BATTERY_LED, 0);
led_set_color(color);
}
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