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/* Copyright 2022 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "battery.h"
#include "charge_manager.h"
#include "charge_state.h"
#include "chipset.h"
#include "ec_commands.h"
#include "hooks.h"
#include "host_command.h"
#include "led_common.h"
#include "pwm.h"
#include "system.h"
#include "util.h"
/* Times of tick per 1 second */
#define TIMES_TICK_ONE_SEC (1000 / HOOK_TICK_INTERVAL_MS)
/* Times of tick per half second */
#define TIMES_TICK_HALF_SEC (500 / HOOK_TICK_INTERVAL_MS)
#define BAT_LED_ON 1
#define BAT_LED_OFF 0
#define PWR_LED_ON 1
#define PWR_LED_OFF 0
const enum ec_led_id supported_led_ids[] = {
EC_LED_ID_RIGHT_LED,
EC_LED_ID_LEFT_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 */
};
enum led_port {
RIGHT_PORT = 0,
LEFT_PORT,
};
static void battery_led_set_color(enum led_port port, enum led_color color)
{
pwm_enable(port ? PWM_CH_LED_C1_AMBER : PWM_CH_LED_C0_AMBER,
(color == LED_AMBER) ? BAT_LED_ON : BAT_LED_OFF);
pwm_enable(port ? PWM_CH_LED_C1_WHITE : PWM_CH_LED_C0_WHITE,
(color == LED_WHITE) ? BAT_LED_ON : BAT_LED_OFF);
}
static void power_led_set_color(enum led_color color)
{
pwm_enable(PWM_CH_LED_PWR,
(color == LED_WHITE) ? PWR_LED_ON : PWR_LED_OFF);
}
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
switch (led_id) {
case EC_LED_ID_RIGHT_LED:
brightness_range[EC_LED_COLOR_AMBER] = 1;
brightness_range[EC_LED_COLOR_WHITE] = 1;
break;
case EC_LED_ID_LEFT_LED:
brightness_range[EC_LED_COLOR_AMBER] = 1;
brightness_range[EC_LED_COLOR_WHITE] = 1;
break;
case EC_LED_ID_POWER_LED:
brightness_range[EC_LED_COLOR_AMBER] = 1;
brightness_range[EC_LED_COLOR_WHITE] = 1;
break;
default:
break;
}
}
static int led_set_color(enum ec_led_id led_id, enum led_color color)
{
switch (led_id) {
case EC_LED_ID_RIGHT_LED:
battery_led_set_color(RIGHT_PORT, color);
break;
case EC_LED_ID_LEFT_LED:
battery_led_set_color(LEFT_PORT, color);
break;
case EC_LED_ID_POWER_LED:
power_led_set_color(color);
break;
default:
return EC_ERROR_UNKNOWN;
}
return EC_SUCCESS;
}
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
if (brightness[EC_LED_COLOR_WHITE] != 0)
led_set_color(led_id, LED_WHITE);
else if (brightness[EC_LED_COLOR_AMBER] != 0)
led_set_color(led_id, LED_AMBER);
else
led_set_color(led_id, 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))
battery_led_set_color(RIGHT_PORT,
(port == RIGHT_PORT) ? color : LED_OFF);
if (led_auto_control_is_enabled(EC_LED_ID_LEFT_LED))
battery_led_set_color(LEFT_PORT,
(port == LEFT_PORT) ? color : LED_OFF);
}
static void board_led_set_battery(void)
{
static int battery_ticks;
int battery_led_blink_cycle;
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 (charge_get_percent() <= 10) {
battery_led_blink_cycle =
battery_ticks % (2 * TIMES_TICK_ONE_SEC);
if (led_auto_control_is_enabled(EC_LED_ID_RIGHT_LED))
battery_led_set_color(RIGHT_PORT,
(battery_led_blink_cycle <
TIMES_TICK_ONE_SEC) ?
LED_AMBER :
LED_OFF);
if (led_auto_control_is_enabled(EC_LED_ID_LEFT_LED))
battery_led_set_color(LEFT_PORT,
(battery_led_blink_cycle <
TIMES_TICK_ONE_SEC) ?
LED_AMBER :
LED_OFF);
} else {
if (led_auto_control_is_enabled(EC_LED_ID_RIGHT_LED))
battery_led_set_color(RIGHT_PORT, LED_OFF);
if (led_auto_control_is_enabled(EC_LED_ID_LEFT_LED))
battery_led_set_color(LEFT_PORT, LED_OFF);
}
break;
case PWR_STATE_ERROR:
battery_led_blink_cycle = battery_ticks % TIMES_TICK_ONE_SEC;
if (led_auto_control_is_enabled(EC_LED_ID_RIGHT_LED))
battery_led_set_color(RIGHT_PORT,
(battery_led_blink_cycle <
TIMES_TICK_HALF_SEC) ?
LED_AMBER :
LED_OFF);
if (led_auto_control_is_enabled(EC_LED_ID_LEFT_LED))
battery_led_set_color(LEFT_PORT,
(battery_led_blink_cycle <
TIMES_TICK_HALF_SEC) ?
LED_AMBER :
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 */
set_active_port_color(LED_WHITE);
break;
case PWR_STATE_FORCED_IDLE:
battery_led_blink_cycle =
battery_ticks % (2 * TIMES_TICK_ONE_SEC);
set_active_port_color(
(battery_led_blink_cycle < TIMES_TICK_ONE_SEC) ?
LED_AMBER :
LED_OFF);
break;
default:
/* Other states don't alter LED behavior */
break;
}
}
static void board_led_set_power(void)
{
static int power_ticks;
int power_led_blink_cycle;
power_ticks++;
if (chipset_in_state(CHIPSET_STATE_ON)) {
power_led_set_color(LED_WHITE);
} else if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND)) {
power_led_blink_cycle = power_ticks % (2 * TIMES_TICK_ONE_SEC);
power_led_set_color(power_led_blink_cycle < TIMES_TICK_ONE_SEC ?
LED_WHITE :
LED_OFF);
} else {
power_led_set_color(LED_OFF);
}
}
/* Called by hook task every TICK */
static void led_tick(void)
{
if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED))
board_led_set_power();
board_led_set_battery();
}
DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
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