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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 LED_ON 1
#define LED_OFF 0
#define LED_TOTAL_TICKS 20
#define LED_CHARGE_PULSE 10
#define LED_POWER_PULSE 15
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_charge_state {
LED_STATE_DISCHARGE = 0,
LED_STATE_CHARGE,
LED_STATE_FULL,
LED_STATE_ERROR_PHASE0,
LED_STATE_ERROR_PHASE1,
LED_CHARGE_STATE_COUNT
};
enum led_power_state {
LED_STATE_S0 = 0,
LED_STATE_S3_PHASE0,
LED_STATE_S3_PHASE1,
LED_STATE_S5,
LED_POWER_STATE_COUNT
};
static const struct {
uint8_t led1:1;
uint8_t led2:1;
} led_chg_state_table[] = {
[LED_STATE_DISCHARGE] = {LED_OFF, LED_OFF},
[LED_STATE_CHARGE] = {LED_OFF, LED_ON},
[LED_STATE_FULL] = {LED_ON, LED_OFF},
[LED_STATE_ERROR_PHASE0] = {LED_OFF, LED_OFF},
[LED_STATE_ERROR_PHASE1] = {LED_OFF, LED_ON}
};
static const struct {
uint8_t led:1;
} led_pwr_state_table[] = {
[LED_STATE_S0] = {LED_ON},
[LED_STATE_S3_PHASE0] = {LED_OFF},
[LED_STATE_S3_PHASE1] = {LED_ON},
[LED_STATE_S5] = {LED_OFF}
};
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
brightness_range[EC_LED_COLOR_WHITE] = 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)
{
gpio_set_level(GPIO_PWR_LED, brightness[EC_LED_COLOR_WHITE]);
gpio_set_level(GPIO_CHG_LED1, brightness[EC_LED_COLOR_GREEN]);
gpio_set_level(GPIO_CHG_LED2, brightness[EC_LED_COLOR_AMBER]);
return EC_SUCCESS;
}
void config_power_led(enum led_power_state state)
{
gpio_set_level(GPIO_PWR_LED, led_pwr_state_table[state].led);
}
void config_battery_led(enum led_charge_state state)
{
gpio_set_level(GPIO_CHG_LED1, led_chg_state_table[state].led1);
gpio_set_level(GPIO_CHG_LED2, led_chg_state_table[state].led2);
}
static void rammus_led_set_power(void)
{
static unsigned int power_ticks;
int chipset_state;
chipset_state = chipset_in_state(CHIPSET_STATE_HARD_OFF) |
(chipset_in_state(CHIPSET_STATE_SOFT_OFF) << 1) |
(chipset_in_state(CHIPSET_STATE_SUSPEND) << 2) |
(chipset_in_state(CHIPSET_STATE_ON) << 3) |
(chipset_in_state(CHIPSET_STATE_STANDBY) << 4);
switch (chipset_state) {
case CHIPSET_STATE_ON:
config_power_led(LED_STATE_S0);
power_ticks = 0;
break;
case CHIPSET_STATE_SUSPEND:
case CHIPSET_STATE_STANDBY:
if ((power_ticks++ % LED_TOTAL_TICKS) < LED_POWER_PULSE)
config_power_led(LED_STATE_S3_PHASE0);
else
config_power_led(LED_STATE_S3_PHASE1);
break;
case CHIPSET_STATE_HARD_OFF:
case CHIPSET_STATE_SOFT_OFF:
config_power_led(LED_STATE_S5);
power_ticks = 0;
break;
default:
break;
}
}
static void rammus_led_set_battery(void)
{
enum charge_state chg_state = charge_get_state();
int charge_percent = charge_get_percent();
static unsigned int charge_ticks;
/* CHIPSET_STATE_OFF */
switch (chg_state) {
case PWR_STATE_DISCHARGE:
if ((charge_get_flags() & CHARGE_FLAG_EXTERNAL_POWER) &&
charge_percent >= BATTERY_LEVEL_NEAR_FULL)
config_battery_led(LED_STATE_FULL);
else
config_battery_led(LED_STATE_DISCHARGE);
charge_ticks = 0;
break;
case PWR_STATE_CHARGE:
config_battery_led(LED_STATE_CHARGE);
charge_ticks = 0;
break;
case PWR_STATE_ERROR:
if ((charge_ticks++ % LED_TOTAL_TICKS) < LED_CHARGE_PULSE)
config_battery_led(LED_STATE_ERROR_PHASE0);
else
config_battery_led(LED_STATE_ERROR_PHASE1);
break;
case PWR_STATE_CHARGE_NEAR_FULL:
case PWR_STATE_IDLE:
if(charge_get_flags() & CHARGE_FLAG_EXTERNAL_POWER)
config_battery_led(LED_STATE_FULL);
else
config_battery_led(LED_STATE_OFF);
charge_ticks = 0;
break;
default:
break;
}
}
/**
* Called by hook task every 200 ms
*/
static void led_tick(void)
{
if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED))
rammus_led_set_power();
if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
rammus_led_set_battery();
}
DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
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