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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 for lalala
*/
#include "battery.h"
#include "charge_state.h"
#include "chipset.h"
#include "ec_commands.h"
#include "extpower.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 0
#define LED_OFF_LVL 1
#define LED_INDEFINITE UINT8_MAX
#define LED_ONE_SEC (1000 / HOOK_TICK_INTERVAL_MS)
#define LED_OFF EC_LED_COLOR_COUNT
struct led_descriptor {
enum ec_led_colors color;
uint8_t time;
};
enum led_phase {
LED_PHASE_0,
LED_PHASE_1,
LED_NUM_PHASES
};
enum led_states {
STATE_CHARGING,
STATE_CHARGING_FULL_CHARGE,
STATE_DISCHARGE_S0,
STATE_DISCHARGE_S0_BAT_LOW,
STATE_BATTERY_S0_ERROR,
STATE_BATTERY_S3_BLINK,
STATE_BATTERY_S5_OFF,
STATE_FACTORY_TEST,
LED_NUM_STATES
};
static const struct led_descriptor
led_bat_state_table[LED_NUM_STATES][LED_NUM_PHASES] = {
[STATE_CHARGING] = {{EC_LED_COLOR_AMBER, LED_INDEFINITE} },
[STATE_CHARGING_FULL_CHARGE] = {{EC_LED_COLOR_WHITE, LED_INDEFINITE} },
[STATE_DISCHARGE_S0] = {{EC_LED_COLOR_WHITE, LED_INDEFINITE} },
[STATE_DISCHARGE_S0_BAT_LOW] = {{EC_LED_COLOR_AMBER, 1 * LED_ONE_SEC},
{LED_OFF, 3 * LED_ONE_SEC} },
[STATE_BATTERY_S0_ERROR] = {{EC_LED_COLOR_AMBER, 1 * LED_ONE_SEC},
{LED_OFF, 1 * LED_ONE_SEC} },
[STATE_BATTERY_S3_BLINK] = {{EC_LED_COLOR_WHITE, 1 * LED_ONE_SEC},
{LED_OFF, 3 * LED_ONE_SEC} },
[STATE_BATTERY_S5_OFF] = {{LED_OFF, LED_INDEFINITE} },
[STATE_FACTORY_TEST] = {{EC_LED_COLOR_WHITE, 2 * LED_ONE_SEC},
{EC_LED_COLOR_AMBER, 2 * LED_ONE_SEC} },
};
const enum ec_led_id supported_led_ids[] = {
EC_LED_ID_BATTERY_LED
};
const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
static int led_get_charge_percent(void)
{
return DIV_ROUND_NEAREST(charge_get_display_charge(), 10);
}
void led_set_color_battery(enum ec_led_colors color)
{
switch (color) {
case EC_LED_COLOR_AMBER:
gpio_set_level(GPIO_BAT_LED_AMBER, LED_ON_LVL);
gpio_set_level(GPIO_PWR_LED_WHITE, LED_OFF_LVL);
break;
case EC_LED_COLOR_WHITE:
gpio_set_level(GPIO_BAT_LED_AMBER, LED_OFF_LVL);
gpio_set_level(GPIO_PWR_LED_WHITE, LED_ON_LVL);
break;
default: /* LED_OFF and other unsupported colors */
gpio_set_level(GPIO_BAT_LED_AMBER, LED_OFF_LVL);
gpio_set_level(GPIO_PWR_LED_WHITE, LED_OFF_LVL);
break;
}
}
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;
}
}
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(EC_LED_COLOR_WHITE);
else if (brightness[EC_LED_COLOR_AMBER] != 0)
led_set_color_battery(EC_LED_COLOR_AMBER);
else
led_set_color_battery(LED_OFF);
}
return EC_SUCCESS;
}
/* Custom led on off states control */
static enum led_states led_get_state(void)
{
enum led_states new_state = LED_NUM_STATES;
switch (charge_get_state()) {
case PWR_STATE_CHARGE:
new_state = STATE_CHARGING;
break;
case PWR_STATE_DISCHARGE_FULL:
if (extpower_is_present()) {
new_state = STATE_CHARGING_FULL_CHARGE;
break;
}
/* Intentional fall-through */
case PWR_STATE_DISCHARGE /* and PWR_STATE_DISCHARGE_FULL */:
if (chipset_in_state(CHIPSET_STATE_ON))
new_state = (led_get_charge_percent() < 10) ?
STATE_DISCHARGE_S0_BAT_LOW : STATE_DISCHARGE_S0;
else if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND))
new_state = STATE_BATTERY_S3_BLINK;
else
new_state = STATE_BATTERY_S5_OFF;
break;
case PWR_STATE_ERROR:
if (chipset_in_state(CHIPSET_STATE_ON))
new_state = STATE_BATTERY_S0_ERROR;
else if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND))
new_state = STATE_BATTERY_S3_BLINK;
else
new_state = STATE_BATTERY_S5_OFF;
break;
case PWR_STATE_CHARGE_NEAR_FULL:
new_state = STATE_CHARGING_FULL_CHARGE;
break;
case PWR_STATE_IDLE: /* External power connected in IDLE */
if (charge_get_flags() & CHARGE_FLAG_FORCE_IDLE)
new_state = STATE_FACTORY_TEST;
else
new_state = STATE_DISCHARGE_S0;
break;
default:
/* Other states don't alter LED behavior */
break;
}
return new_state;
}
static void led_update_battery(void)
{
static uint8_t ticks, period;
static int led_state = LED_NUM_STATES;
int phase;
enum led_states desired_state = led_get_state();
/*
* We always need to check the current state since the value could
* have been manually overwritten. If we're in a new valid state,
* update our ticks and period info. If our new state isn't defined,
* continue using the previous one.
*/
if (desired_state != led_state && desired_state < LED_NUM_STATES) {
/* State is changing */
led_state = desired_state;
/* Reset ticks and period when state changes */
ticks = 0;
period = led_bat_state_table[led_state][LED_PHASE_0].time +
led_bat_state_table[led_state][LED_PHASE_1].time;
}
/* If this state is undefined, turn the LED off */
if (period == 0) {
led_set_color_battery(LED_OFF);
return;
}
/*
* Determine which phase of the state table to use. The phase is
* determined if it falls within first phase time duration.
*/
phase = ticks < led_bat_state_table[led_state][LED_PHASE_0].time ?
0 : 1;
ticks = (ticks + 1) % period;
/* Set the color for the given state and phase */
led_set_color_battery(led_bat_state_table[led_state][phase].color);
}
static void led_init(void)
{
/* If battery LED is enabled, set it to "off" to start with */
if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
led_set_color_battery(LED_OFF);
}
DECLARE_HOOK(HOOK_INIT, led_init, HOOK_PRIO_DEFAULT);
/* Called by hook task every hook tick (200 msec) */
static void led_update(void)
{
/*
* If battery LED is enabled, set its state based on our power and
* charge
*/
if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
led_update_battery();
}
DECLARE_HOOK(HOOK_TICK, led_update, HOOK_PRIO_DEFAULT);
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