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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 for Reef
*/
#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 "util.h"
#define BAT_LED_ON 0
#define BAT_LED_OFF 1
#define CRITICAL_LOW_BATTERY_PERCENTAGE 3
#define LOW_BATTERY_PERCENTAGE 10
#define LED_TOTAL_4SECS_TICKS 4
#define LED_TOTAL_2SECS_TICKS 2
#define LED_ON_1SEC_TICKS 1
#define LED_ON_2SECS_TICKS 2
const enum ec_led_id supported_led_ids[] = { EC_LED_ID_BATTERY_LED };
const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
enum led_color {
LED_OFF = 0,
LED_BLUE,
LED_AMBER,
LED_COLOR_COUNT /* Number of colors, not a color itself */
};
static int led_set_color_battery(enum led_color color)
{
switch (color) {
case LED_OFF:
gpio_set_level(GPIO_BAT_LED_BLUE, BAT_LED_OFF);
gpio_set_level(GPIO_BAT_LED_AMBER, BAT_LED_OFF);
break;
case LED_BLUE:
gpio_set_level(GPIO_BAT_LED_BLUE, BAT_LED_ON);
gpio_set_level(GPIO_BAT_LED_AMBER, BAT_LED_OFF);
break;
case LED_AMBER:
gpio_set_level(GPIO_BAT_LED_BLUE, BAT_LED_OFF);
gpio_set_level(GPIO_BAT_LED_AMBER, BAT_LED_ON);
break;
default:
return EC_ERROR_UNKNOWN;
}
return EC_SUCCESS;
}
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
brightness_range[EC_LED_COLOR_BLUE] = 1;
brightness_range[EC_LED_COLOR_AMBER] = 1;
}
static int led_set_color(enum ec_led_id led_id, enum led_color color)
{
int rv;
switch (led_id) {
case EC_LED_ID_BATTERY_LED:
rv = led_set_color_battery(color);
break;
default:
return EC_ERROR_UNKNOWN;
}
return rv;
}
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
if (brightness[EC_LED_COLOR_BLUE] != 0)
led_set_color(led_id, LED_BLUE);
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;
}
static void led_set_battery(void)
{
static int battery_ticks;
static int suspend_ticks;
switch (charge_get_state()) {
case PWR_STATE_CHARGE:
led_set_color_battery(LED_AMBER);
break;
case PWR_STATE_DISCHARGE_FULL:
if (extpower_is_present()) {
led_set_color_battery(LED_BLUE);
break;
}
/* Intentional fall-through */
case PWR_STATE_DISCHARGE /* and PWR_STATE_DISCHARGE_FULL */:
if (chipset_in_state(CHIPSET_STATE_ON)) {
led_set_color_battery(LED_BLUE);
} else if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND)) {
/* Blink once every four seconds. */
led_set_color_battery(
(suspend_ticks % LED_TOTAL_4SECS_TICKS) <
LED_ON_1SEC_TICKS ?
LED_AMBER :
LED_OFF);
} else {
led_set_color_battery(LED_OFF);
}
break;
case PWR_STATE_ERROR:
led_set_color_battery((battery_ticks % LED_TOTAL_2SECS_TICKS <
LED_ON_1SEC_TICKS) ?
LED_AMBER :
LED_OFF);
break;
case PWR_STATE_CHARGE_NEAR_FULL:
led_set_color_battery(LED_BLUE);
break;
case PWR_STATE_IDLE: /* External power connected in IDLE */
led_set_color_battery(LED_BLUE);
break;
case PWR_STATE_FORCED_IDLE:
led_set_color_battery((battery_ticks % LED_TOTAL_4SECS_TICKS <
LED_ON_2SECS_TICKS) ?
LED_AMBER :
LED_BLUE);
break;
default:
/* Other states don't alter LED behavior */
break;
}
battery_ticks++;
suspend_ticks++;
}
/* Called by hook task every 1 sec */
static void led_second(void)
{
/*
* Reference board only has one LED, so overload it to act as both
* power LED and battery LED.
*/
if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
led_set_battery();
}
DECLARE_HOOK(HOOK_SECOND, led_second, HOOK_PRIO_DEFAULT);
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