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/* Copyright (c) 2014 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.
*
* Battery LED control for Candy
*/
#include "charge_state.h"
#include "chipset.h"
#include "gpio.h"
#include "hooks.h"
#include "led_common.h"
#include "util.h"
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_WHITE,
LED_AMBER,
/* Number of colors, not a color itself */
LED_COLOR_COUNT
};
/**
* Set LED color
*
* @param color Enumerated color value
*/
static void set_color(enum led_color color)
{
switch (color) {
case LED_OFF:
gpio_set_level(GPIO_BAT_LED0, 1);
gpio_set_level(GPIO_BAT_LED1, 1);
break;
case LED_WHITE:
gpio_set_level(GPIO_BAT_LED0, 0);
gpio_set_level(GPIO_BAT_LED1, 1);
break;
case LED_AMBER:
gpio_set_level(GPIO_BAT_LED0, 1);
gpio_set_level(GPIO_BAT_LED1, 0);
break;
default:
break;
}
}
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
brightness_range[EC_LED_COLOR_WHITE] = 100;
brightness_range[EC_LED_COLOR_YELLOW] = 100;
}
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
if (brightness[EC_LED_COLOR_WHITE] != 0)
set_color(LED_WHITE);
else if (brightness[EC_LED_COLOR_YELLOW] != 0)
set_color(LED_AMBER);
else
set_color(LED_OFF);
return EC_SUCCESS;
}
/**
* Called by hook task every 250 ms
*/
static void led_tick(void)
{
static unsigned ticks;
int chstate = charge_get_state();
ticks++;
/* If we don't control the LED, nothing to do */
if (!led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
return;
/* If charging error, blink amber, 500ms period */
if (chstate == PWR_STATE_ERROR) {
set_color((ticks & 0x2) ? LED_AMBER : LED_OFF);
return;
}
/* If charge-force-idle, blink white, 1 sec period */
if (chstate == PWR_STATE_IDLE &&
(charge_get_flags() & CHARGE_FLAG_FORCE_IDLE)) {
set_color((ticks & 0x4) ? LED_WHITE : LED_OFF);
return;
}
/* If the system is charging, solid white */
if (chstate == PWR_STATE_CHARGE) {
set_color(LED_WHITE);
return;
}
/* If battery capacity under 15% , solid amber */
if (chstate == PWR_STATE_DISCHARGE) {
if (chipset_in_state(CHIPSET_STATE_ON) ||
chipset_in_state(CHIPSET_STATE_SUSPEND))
set_color((charge_get_percent() < 15) ?
LED_AMBER : LED_OFF);
else
set_color(LED_OFF);
return;
}
/* Otherwise, system is off and AC not connected, LED off */
set_color(LED_OFF);
}
DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
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