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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"
#define BAT_LED_ON 1
#define BAT_LED_OFF 0
const enum ec_led_id supported_led_ids[] = {
EC_LED_ID_RIGHT_LED,
EC_LED_ID_LEFT_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 side_led_set_color(int port, enum led_color color)
{
gpio_set_level(port ? GPIO_EC_CHG_LED_Y_C1 : GPIO_EC_CHG_LED_Y_C0,
(color == LED_AMBER) ? BAT_LED_ON : BAT_LED_OFF);
gpio_set_level(port ? GPIO_EC_CHG_LED_W_C1 : GPIO_EC_CHG_LED_W_C0,
(color == LED_WHITE) ? BAT_LED_ON : BAT_LED_OFF);
}
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
brightness_range[EC_LED_COLOR_AMBER] = 1;
brightness_range[EC_LED_COLOR_WHITE] = 1;
}
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
int port;
switch (led_id) {
case EC_LED_ID_RIGHT_LED:
port = 0;
break;
case EC_LED_ID_LEFT_LED:
port = 1;
break;
default:
return EC_ERROR_PARAM1;
}
if (brightness[EC_LED_COLOR_WHITE] != 0)
side_led_set_color(port, LED_WHITE);
else if (brightness[EC_LED_COLOR_AMBER] != 0)
side_led_set_color(port, LED_AMBER);
else
side_led_set_color(port, LED_OFF);
return EC_SUCCESS;
}
/*
* Set active charge port color to the parameter, turn off all others.
* If no port is active (-1), turn off all LEDs.
*/
static void set_active_port_color(enum led_color color)
{
int port = charge_manager_get_active_charge_port();
if (led_auto_control_is_enabled(EC_LED_ID_RIGHT_LED))
side_led_set_color(0, (port == 0) ? color : LED_OFF);
if (led_auto_control_is_enabled(EC_LED_ID_LEFT_LED))
side_led_set_color(1, (port == 1) ? color : LED_OFF);
}
static void board_led_set_battery(void)
{
static int battery_ticks;
uint32_t chflags = charge_get_flags();
battery_ticks++;
switch (charge_get_state()) {
case PWR_STATE_CHARGE:
/* Always indicate when charging, even in suspend. */
set_active_port_color(LED_AMBER);
break;
case PWR_STATE_DISCHARGE:
if (led_auto_control_is_enabled(EC_LED_ID_RIGHT_LED)) {
if (charge_get_percent() <= 10)
side_led_set_color(0,
(battery_ticks & 0x4) ? LED_WHITE : LED_OFF);
else
side_led_set_color(0, LED_OFF);
}
if (led_auto_control_is_enabled(EC_LED_ID_LEFT_LED))
side_led_set_color(1, LED_OFF);
break;
case PWR_STATE_ERROR:
set_active_port_color((battery_ticks & 0x2) ?
LED_WHITE : LED_OFF);
break;
case PWR_STATE_CHARGE_NEAR_FULL:
set_active_port_color(LED_WHITE);
break;
case PWR_STATE_IDLE: /* External power connected in IDLE */
if (chflags & CHARGE_FLAG_FORCE_IDLE)
set_active_port_color((battery_ticks & 0x4) ?
LED_AMBER : LED_OFF);
else
set_active_port_color(LED_WHITE);
break;
default:
/* Other states don't alter LED behavior */
break;
}
}
/* Called by hook task every TICK */
static void led_tick(void)
{
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_LEFT_LED, 1);
led_auto_control(EC_LED_ID_RIGHT_LED, 1);
board_led_set_battery();
return;
}
color = state ? LED_WHITE : LED_OFF;
led_auto_control(EC_LED_ID_LEFT_LED, 0);
led_auto_control(EC_LED_ID_RIGHT_LED, 0);
side_led_set_color(0, color);
side_led_set_color(1, color);
}
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