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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 and Power LED control for Veyron
*/
#include "gpio.h"
#include "hooks.h"
#include "battery.h"
#include "charge_state.h"
#include "chipset.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_GREEN,
LED_ORANGE,
LED_COLOR_COUNT /* Number of colors, not a color itself */
};
static int bat_led_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_GREEN:
gpio_set_level(GPIO_BAT_LED0, 1);
gpio_set_level(GPIO_BAT_LED1, 0);
break;
case LED_ORANGE:
gpio_set_level(GPIO_BAT_LED0, 0);
gpio_set_level(GPIO_BAT_LED1, 1);
break;
default:
return EC_ERROR_UNKNOWN;
}
return EC_SUCCESS;
}
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
/* Ignoring led_id as both leds support the same colors */
brightness_range[EC_LED_COLOR_GREEN] = 1;
brightness_range[EC_LED_COLOR_YELLOW] = 1;
}
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
if (EC_LED_ID_BATTERY_LED == led_id) {
if (brightness[EC_LED_COLOR_GREEN] != 0)
bat_led_set_color(LED_GREEN);
else if (brightness[EC_LED_COLOR_YELLOW] != 0)
bat_led_set_color(LED_ORANGE);
else
bat_led_set_color(LED_OFF);
return EC_SUCCESS;
} else {
return EC_ERROR_UNKNOWN;
}
}
static void veyron_led_set_battery(void)
{
static int battery_second;
uint32_t chflags = charge_get_flags();
battery_second++;
/* BAT LED behavior:
* Fully charged / idle: Blue
* Force idle (for factory): 2 secs of blue, 2 secs of yellow
* Under charging: Orange
* Battery low (10%): Orange in breeze mode (1 sec on, 3 sec off)
* Battery critical low (less than 3%) or abnormal battery
* situation: Orange in blinking mode (1 sec on, 1 sec off)
* Using battery or not connected to AC power: OFF
*/
switch (charge_get_state()) {
case PWR_STATE_CHARGE:
bat_led_set_color(LED_ORANGE);
break;
case PWR_STATE_DISCHARGE:
if (charge_get_percent() < 3)
bat_led_set_color((battery_second & 1)
? LED_OFF : LED_ORANGE);
else if (charge_get_percent() < 10)
bat_led_set_color((battery_second & 3)
? LED_OFF : LED_ORANGE);
else
bat_led_set_color(LED_OFF);
break;
case PWR_STATE_ERROR:
bat_led_set_color((battery_second & 1) ? LED_OFF : LED_ORANGE);
break;
case PWR_STATE_CHARGE_NEAR_FULL:
bat_led_set_color(LED_GREEN);
break;
case PWR_STATE_IDLE: /* External power connected in IDLE. */
if (chflags & CHARGE_FLAG_FORCE_IDLE)
bat_led_set_color((battery_second & 0x2)
? LED_GREEN : LED_ORANGE);
else
bat_led_set_color(LED_GREEN);
break;
default:
/* Other states don't alter LED behavior */
break;
}
}
/** * Called by hook task every 1 sec */
static void led_second(void)
{
if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
veyron_led_set_battery();
}
DECLARE_HOOK(HOOK_SECOND, led_second, HOOK_PRIO_DEFAULT);
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