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/* Copyright 2020 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 LED_ON_LVL 1
#define LED_OFF_LVL 0
const enum ec_led_id supported_led_ids[] = {
EC_LED_ID_BATTERY_LED,
EC_LED_ID_POWER_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 void led_set_color_battery(enum led_color color)
{
gpio_set_level(GPIO_EC_CHG_LED_Y_C0,
(color == LED_AMBER) ? LED_ON_LVL : LED_OFF_LVL);
gpio_set_level(GPIO_EC_CHG_LED_W_C0,
(color == LED_WHITE) ? LED_ON_LVL : LED_OFF_LVL);
}
void led_set_color_power(enum led_color color)
{
gpio_set_level(GPIO_EC_PWR_LED_W,
(color == LED_WHITE) ? LED_ON_LVL : LED_OFF_LVL);
}
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
if (led_id == EC_LED_ID_BATTERY_LED) {
brightness_range[EC_LED_COLOR_AMBER] = 1;
brightness_range[EC_LED_COLOR_WHITE] = 1;
} else if (led_id == EC_LED_ID_POWER_LED) {
brightness_range[EC_LED_COLOR_WHITE] = 1;
}
}
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
if (led_id == EC_LED_ID_BATTERY_LED) {
if (brightness[EC_LED_COLOR_WHITE] != 0)
led_set_color_battery(LED_WHITE);
else if (brightness[EC_LED_COLOR_AMBER] != 0)
led_set_color_battery(LED_AMBER);
else
led_set_color_battery(LED_OFF);
} else if (led_id == EC_LED_ID_POWER_LED) {
if (brightness[EC_LED_COLOR_WHITE] != 0)
led_set_color_power(LED_WHITE);
else
led_set_color_power(LED_OFF);
}
return EC_SUCCESS;
}
static void board_led_set_battery(void)
{
static int battery_ticks;
int color = LED_OFF;
int period = 0;
uint32_t chflags = charge_get_flags();
battery_ticks++;
switch (charge_get_state()) {
case PWR_STATE_CHARGE:
/* Always indicate amber on when charging. */
color = LED_AMBER;
break;
case PWR_STATE_DISCHARGE:
/* Discharging : off */
color = LED_OFF;
break;
case PWR_STATE_ERROR:
/* Battery error: Amber 1 sec, off 1 sec */
period = (1 + 1);
battery_ticks = battery_ticks % period;
if (battery_ticks < 1)
color = LED_AMBER;
else
color = LED_OFF;
break;
case PWR_STATE_CHARGE_NEAR_FULL:
/* Full Charged: White on */
color = LED_WHITE;
break;
case PWR_STATE_IDLE: /* External power connected in IDLE */
if (chflags & CHARGE_FLAG_FORCE_IDLE) {
/* Factory mode: White 2 sec, Amber 2 sec */
period = (2 + 2);
battery_ticks = battery_ticks % period;
if (battery_ticks < 2)
color = LED_WHITE;
else
color = LED_AMBER;
} else
color = LED_WHITE;
break;
default:
/* Other states don't alter LED behavior */
break;
}
led_set_color_battery(color);
}
static void board_led_set_power(void)
{
static int power_ticks;
int color = LED_OFF;
int period = 0;
power_ticks++;
if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND)) {
/* S3: On 1 sec, Off 3 sec */
period = (1 + 3);
power_ticks = power_ticks % period;
if (power_ticks < 1)
color = LED_WHITE;
else
color = LED_OFF;
} else if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) {
/* S5: LED off */
color = LED_OFF;
} else if (chipset_in_state(CHIPSET_STATE_ON)) {
/* S0: LED on */
color = LED_WHITE;
}
led_set_color_power(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();
if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED))
board_led_set_power();
}
DECLARE_HOOK(HOOK_SECOND, 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_WHITE : LED_OFF;
led_auto_control(EC_LED_ID_BATTERY_LED, 0);
led_set_color_battery(color);
}
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