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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.
*/
/* Primus specific PWM LED settings. */
#include <stdint.h>
#include "common.h"
#include "compile_time_macros.h"
#include "battery.h"
#include "charge_manager.h"
#include "charge_state.h"
#include "chipset.h"
#include "common.h"
#include "console.h"
#include "ec_commands.h"
#include "extpower.h"
#include "hooks.h"
#include "led_common.h"
#include "power.h"
#include "pwm.h"
#include "task.h"
#include "timer.h"
#include "util.h"
#define CPRINTS(format, args...) cprints(CC_LOGOLED, format, ## args)
#define LED_ON_LVL 100
#define LED_OFF_LVL 0
#define LED_BAT_S3_OFF_TIME_MS 3000
#define LED_BAT_S3_TICK_MS 50
#define LED_BAT_S3_PWM_RESCALE 5
#define LED_TOTAL_TICKS 6
#define TICKS_STEP1_BRIGHTER 0
#define TICKS_STEP2_DIMMER (1000 / LED_BAT_S3_TICK_MS)
#define TICKS_STEP3_OFF (2 * TICKS_STEP2_DIMMER)
#define LED_ONE_SEC (1000 / HOOK_TICK_INTERVAL_MS)
#define LED_LOGO_TICK_SEC (LED_ONE_SEC / 4)
/* Total on/off duration in a period */
#define PERIOD (LED_LOGO_TICK_SEC * 2)
#define LED_ON 1
#define LED_OFF EC_LED_COLOR_COUNT
#define LED_EVENT_SUSPEND TASK_EVENT_CUSTOM_BIT(0)
#define LED_EVENT_200MS_TICK TASK_EVENT_CUSTOM_BIT(1)
static int tick;
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);
static void led_set_color_battery(enum ec_led_colors color)
{
switch (color) {
case EC_LED_COLOR_AMBER:
pwm_set_duty(PWM_CH_LED1_AMBER, LED_ON_LVL);
pwm_set_duty(PWM_CH_LED2_WHITE, LED_OFF_LVL);
break;
case EC_LED_COLOR_WHITE:
pwm_set_duty(PWM_CH_LED2_WHITE, LED_ON_LVL);
pwm_set_duty(PWM_CH_LED1_AMBER, LED_OFF_LVL);
break;
default: /* LED_OFF and other unsupported colors */
pwm_set_duty(PWM_CH_LED1_AMBER, LED_OFF_LVL);
pwm_set_duty(PWM_CH_LED2_WHITE, LED_OFF_LVL);
break;
}
}
static void led_set_battery(void)
{
switch (charge_get_state()) {
case PWR_STATE_CHARGE:
/* Always indicate when charging, even in suspend. */
led_set_color_battery(EC_LED_COLOR_AMBER);
break;
case PWR_STATE_DISCHARGE:
led_set_color_battery(LED_OFF);
break;
case PWR_STATE_CHARGE_NEAR_FULL:
led_set_color_battery(EC_LED_COLOR_WHITE);
break;
default:
/* Other states don't alter LED behavior */
break;
}
}
void led_set_color_power(int onoff_status)
{
/* primus logo led and power led have same behavior. */
if (onoff_status == LED_ON) {
pwm_set_duty(PWM_CH_TKP_A_LED_N, LED_ON_LVL);
pwm_set_duty(PWM_CH_LED4, LED_ON_LVL);
} else {
/* LED_OFF and unsupported colors */
pwm_set_duty(PWM_CH_TKP_A_LED_N, LED_OFF_LVL);
pwm_set_duty(PWM_CH_LED4, LED_OFF_LVL);
}
}
#define AC_DISCONNECTED (-1)
static void led_set_power(void)
{
static int plug_ac_countdown;
static int ticks;
if (plug_ac_countdown > 0) {
ticks = (ticks + 1) % PERIOD;
plug_ac_countdown--;
if (ticks < LED_LOGO_TICK_SEC)
led_set_color_power(LED_OFF);
else
led_set_color_power(LED_ON);
} else if (chipset_in_state(CHIPSET_STATE_ON))
led_set_color_power(LED_ON);
else if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
led_set_color_power(LED_OFF);
/* Check AC_PRESENT */
if (!extpower_is_present())
plug_ac_countdown = AC_DISCONNECTED;
else if (plug_ac_countdown == AC_DISCONNECTED)
/* AC power was plugged in (previous state was "disconnected"),
* set plug_ac_countdown for amount of ticks left
*/
plug_ac_countdown = LED_TOTAL_TICKS;
}
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_RED] = 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_AMBER] != 0)
led_set_color_battery(EC_LED_COLOR_AMBER);
else if (brightness[EC_LED_COLOR_WHITE] != 0)
led_set_color_battery(EC_LED_COLOR_WHITE);
else
led_set_color_battery(LED_OFF);
} else if (led_id == EC_LED_ID_POWER_LED) {
if (brightness[EC_LED_COLOR_RED] != 0)
led_set_color_power(LED_ON);
else
led_set_color_power(LED_OFF);
}
return EC_SUCCESS;
}
/* Called by hook task every 200 ms */
static void led_tick(void)
{
task_set_event(TASK_ID_LOGOLED, LED_EVENT_200MS_TICK);
}
DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
static void suspend_led_update(void)
{
while (1) {
tick++;
/* HOOK_CHIPSET_SUSPEND will be called when POWER_S0S0ix,
* if we are not transitioning to suspend, we should break here.
*/
if (!chipset_in_or_transitioning_to_state(
CHIPSET_STATE_ANY_SUSPEND))
break;
/* 1s gradual on, 1s gradual off, 3s off */
if (tick <= TICKS_STEP2_DIMMER) {
/* increase 5 duty every 50ms until PWM=100
* enter here 20 times, total duartion is 1sec
* A-cover and power button led are shared same
* behavior.
*/
pwm_set_duty(PWM_CH_TKP_A_LED_N,
tick * LED_BAT_S3_PWM_RESCALE);
pwm_set_duty(PWM_CH_LED4,
tick * LED_BAT_S3_PWM_RESCALE);
msleep(LED_BAT_S3_TICK_MS);
} else if (tick <= TICKS_STEP3_OFF) {
/* decrease 5 duty every 50ms until PWM=0
* enter here 20 times, total duartion is 1sec
* A-cover and power button led are shared same
* behavior.
*/
pwm_set_duty(PWM_CH_TKP_A_LED_N, (TICKS_STEP3_OFF
- tick) * LED_BAT_S3_PWM_RESCALE);
pwm_set_duty(PWM_CH_LED4, (TICKS_STEP3_OFF
- tick) * LED_BAT_S3_PWM_RESCALE);
msleep(LED_BAT_S3_TICK_MS);
} else {
tick = TICKS_STEP1_BRIGHTER;
msleep(LED_BAT_S3_OFF_TIME_MS);
}
}
}
static void suspend_led_init(void)
{
task_set_event(TASK_ID_LOGOLED, LED_EVENT_SUSPEND);
}
DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, suspend_led_init, HOOK_PRIO_DEFAULT);
void logoled_task(void *u)
{
uint32_t evt;
while (1) {
evt = task_wait_event(-1);
if (evt & LED_EVENT_SUSPEND) {
tick = TICKS_STEP2_DIMMER;
suspend_led_update();
}
if (evt & LED_EVENT_200MS_TICK) {
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();
}
}
}
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