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/* Copyright (c) 2013 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 Peppy.
*/
#include "battery.h"
#include "charge_state.h"
#include "chipset.h"
#include "gpio.h"
#include "hooks.h"
#define LED_TOTAL_TICKS 16
#define LED_ON_TICKS 4
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(enum led_color color, enum gpio_signal gpio_led_blue_l,
enum gpio_signal gpio_led_amber_l)
{
switch (color) {
case LED_OFF:
gpio_set_level(gpio_led_blue_l, 1);
gpio_set_level(gpio_led_amber_l, 1);
break;
case LED_BLUE:
gpio_set_level(gpio_led_blue_l, 0);
gpio_set_level(gpio_led_amber_l, 1);
break;
case LED_AMBER:
gpio_set_level(gpio_led_blue_l, 1);
gpio_set_level(gpio_led_amber_l, 0);
break;
default:
return EC_ERROR_UNKNOWN;
}
return EC_SUCCESS;
}
static int bat_led_set_color(enum led_color color)
{
return led_set_color(color, GPIO_BAT_LED0_L, GPIO_BAT_LED1_L);
}
static int pwr_led_set_color(enum led_color color)
{
return led_set_color(color, GPIO_PWR_LED0_L, GPIO_PWR_LED1_L);
}
/* Called by hook task every 250mSec */
static void led_tick(void)
{
static int ticks;
uint32_t chflags = charge_get_flags();
ticks++;
if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
pwr_led_set_color(LED_OFF);
else if (chipset_in_state(CHIPSET_STATE_ON))
pwr_led_set_color(LED_BLUE);
else if (chipset_in_state(CHIPSET_STATE_SUSPEND))
/* Blink once every four seconds. */
pwr_led_set_color((ticks % LED_TOTAL_TICKS < LED_ON_TICKS) ?
LED_AMBER : LED_OFF);
switch (charge_get_state()) {
case PWR_STATE_CHARGE:
bat_led_set_color(LED_AMBER);
break;
case PWR_STATE_CHARGE_NEAR_FULL:
bat_led_set_color(LED_BLUE);
break;
case PWR_STATE_DISCHARGE:
bat_led_set_color(LED_OFF);
break;
case PWR_STATE_ERROR:
bat_led_set_color((ticks & 0x2) ? LED_AMBER : LED_OFF);
break;
case PWR_STATE_IDLE: /* External power connected in IDLE state. */
if (chflags & CHARGE_FLAG_FORCE_IDLE)
bat_led_set_color((ticks & 0x4) ? LED_BLUE : LED_OFF);
else
bat_led_set_color(LED_BLUE);
break;
default:
/* Other states don't alter LED behavior */
break;
}
}
DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
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