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/* Copyright 2019 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.
*/
#include "battery.h"
#include "charge_manager.h"
#include "charge_state.h"
#include "chipset.h"
#include "cros_board_info.h"
#include "ec_commands.h"
#include "extpower.h"
#include "gpio.h"
#include "hooks.h"
#include "led_common.h"
#include "pwm.h"
#include "timer.h"
#include "util.h"
#define LED_BAT_OFF_LVL 0
#define LED_BAT_ON_LVL 1
#define LED_BAT_S3_OFF_TIME_MS 3000
#define LED_BAT_S3_PWM_RESCALE 5
#define LED_BAT_S3_TICK_MS 50
#define LED_TOTAL_TICKS 2
#define LED_ON_TICKS 1
#define LED_PWR_TICKS_PER_CYCLE 7
#define TICKS_STEP1_BRIGHTER 0
#define TICKS_STEP2_DIMMER 20
#define TICKS_STEP3_OFF 40
static int ticks;
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_WHITE,
LED_AMBER,
LED_COLOR_COUNT /* Number of colors, not a color itself */
};
/* PWM brightness vs. color, in the order of off, white */
static const uint8_t color_brightness[2] = {
[LED_OFF] = 0,
[LED_WHITE] = 100,
};
void led_set_color_power(enum ec_led_colors color)
{
pwm_set_duty(PWM_CH_POWER_LED, color_brightness[color]);
}
void led_set_color_battery(enum ec_led_colors color)
{
uint32_t board_ver = 0;
int led_batt_on_lvl, led_batt_off_lvl;
cbi_get_board_version(&board_ver);
if (board_ver >= 3) {
led_batt_on_lvl = LED_BAT_ON_LVL;
led_batt_off_lvl = LED_BAT_OFF_LVL;
} else {
led_batt_on_lvl = !LED_BAT_ON_LVL;
led_batt_off_lvl = !LED_BAT_OFF_LVL;
}
switch (color) {
case LED_AMBER:
gpio_set_level(GPIO_LED_FULL_L, led_batt_off_lvl);
gpio_set_level(GPIO_LED_CHRG_L, led_batt_on_lvl);
break;
case LED_WHITE:
gpio_set_level(GPIO_LED_FULL_L, led_batt_on_lvl);
gpio_set_level(GPIO_LED_CHRG_L, led_batt_off_lvl);
break;
default: /* LED_OFF and other unsupported colors */
gpio_set_level(GPIO_LED_FULL_L, led_batt_off_lvl);
gpio_set_level(GPIO_LED_CHRG_L, led_batt_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;
} else if (led_id == EC_LED_ID_POWER_LED) {
brightness_range[EC_LED_COLOR_WHITE] = 100;
}
}
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_AMBER] != 0)
led_set_color_battery(LED_AMBER);
else if (brightness[EC_LED_COLOR_WHITE] != 0)
led_set_color_battery(LED_WHITE);
else
led_set_color_battery(LED_OFF);
} else if (led_id == EC_LED_ID_POWER_LED) {
if (brightness[EC_LED_COLOR_WHITE] != 0)
pwm_set_duty(PWM_CH_POWER_LED,
color_brightness[LED_WHITE]);
else
pwm_set_duty(PWM_CH_POWER_LED,
color_brightness[LED_OFF]);
}
return EC_SUCCESS;
}
static void suspend_led_update_deferred(void);
DECLARE_DEFERRED(suspend_led_update_deferred);
static void suspend_led_update_deferred(void)
{
int delay = LED_BAT_S3_TICK_MS * MSEC;
ticks++;
/* 1s gradual on, 1s gradual off, 3s off */
if (ticks <= TICKS_STEP2_DIMMER) {
pwm_set_duty(PWM_CH_POWER_LED, ticks * LED_BAT_S3_PWM_RESCALE);
} else if (ticks <= TICKS_STEP3_OFF) {
pwm_set_duty(PWM_CH_POWER_LED,
(TICKS_STEP3_OFF - ticks) * LED_BAT_S3_PWM_RESCALE);
} else {
ticks = TICKS_STEP1_BRIGHTER;
delay = LED_BAT_S3_OFF_TIME_MS * MSEC;
}
hook_call_deferred(&suspend_led_update_deferred_data, delay);
}
static void suspend_led_init(void)
{
ticks = TICKS_STEP2_DIMMER;
hook_call_deferred(&suspend_led_update_deferred_data, 0);
}
DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, suspend_led_init, HOOK_PRIO_DEFAULT);
static void suspend_led_deinit(void)
{
hook_call_deferred(&suspend_led_update_deferred_data, -1);
}
DECLARE_HOOK(HOOK_CHIPSET_RESUME, suspend_led_deinit, HOOK_PRIO_DEFAULT);
DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, suspend_led_deinit, HOOK_PRIO_DEFAULT);
static void 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. */
led_set_color_battery(LED_AMBER);
break;
case PWR_STATE_DISCHARGE:
led_set_color_battery(LED_OFF);
break;
case PWR_STATE_CHARGE_NEAR_FULL:
led_set_color_battery(LED_WHITE);
break;
case PWR_STATE_IDLE: /* External power connected in IDLE */
if (chflags & CHARGE_FLAG_FORCE_IDLE)
led_set_color_battery(
(battery_ticks & 0x4) ? LED_AMBER : LED_OFF);
else
led_set_color_battery(LED_WHITE);
break;
default:
/* Other states don't alter LED behavior */
break;
}
}
static void led_set_power(void)
{
static int power_ticks;
static int previous_state_suspend;
static int blink_ticks;
power_ticks++;
/* Blink 3 times (0.25s on/0.25s off, repeat 3 times) */
if (extpower_is_present()) {
blink_ticks++;
if (!previous_state_suspend)
power_ticks = 0;
while (blink_ticks < LED_PWR_TICKS_PER_CYCLE) {
led_set_color_power(
(power_ticks % LED_TOTAL_TICKS) < LED_ON_TICKS ?
LED_WHITE : LED_OFF);
previous_state_suspend = 1;
return;
}
}
if (!extpower_is_present())
blink_ticks = 0;
previous_state_suspend = 0;
if (chipset_in_state(CHIPSET_STATE_SOFT_OFF))
led_set_color_power(LED_OFF);
if (chipset_in_state(CHIPSET_STATE_ON))
led_set_color_power(LED_WHITE);
}
static void pwr_led_init(void)
{
/* Configure GPIOs */
gpio_config_module(MODULE_PWM, 1);
/*
* Enable PWMs and set to 0% duty cycle. If they're disabled,
* seems to ground the pins instead of letting them float.
*/
pwm_enable(PWM_CH_POWER_LED, 1);
led_set_color_power(LED_OFF);
}
DECLARE_HOOK(HOOK_INIT, pwr_led_init, HOOK_PRIO_DEFAULT);
/* Called by hook task every 200 ms */
static void led_tick(void)
{
if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED))
led_set_power();
if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
led_set_battery();
}
DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
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