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/* Copyright 2016 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 Elm Board.
*/
#include "battery.h"
#include "charge_state.h"
#include "chipset.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "led_common.h"
#include "util.h"
#include "system.h"
#define CRITICAL_LOW_BATTERY_PERMILLAGE 71
#define LOW_BATTERY_PERMILLAGE 137
#define FULL_BATTERY_PERMILLAGE 937
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);
enum led_color {
BAT_LED_BLUE = 0,
BAT_LED_ORANGE,
PWR_LED_BLUE,
PWR_LED_ORANGE,
LED_COLOR_COUNT /* Number of colors, not a color itself */
};
static int bat_led_set(enum led_color color, int on)
{
switch (color) {
case BAT_LED_BLUE:
gpio_set_level(GPIO_BAT_LED0, on); /* BAT_LED_BLUE */
break;
case BAT_LED_ORANGE:
gpio_set_level(GPIO_BAT_LED1, on); /* BAT_LED_ORANGE */
break;
case PWR_LED_BLUE:
gpio_set_level(GPIO_PWR_LED0, on); /* PWR_LED_BLUE */
break;
case PWR_LED_ORANGE:
gpio_set_level(GPIO_PWR_LED1, on); /* PWR_LED_ORANGE */
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_BLUE] = 1;
brightness_range[EC_LED_COLOR_AMBER] = 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_BLUE] != 0) {
bat_led_set(BAT_LED_BLUE, 1);
bat_led_set(BAT_LED_ORANGE, 0);
} else if (brightness[EC_LED_COLOR_AMBER] != 0) {
bat_led_set(BAT_LED_BLUE, 0);
bat_led_set(BAT_LED_ORANGE, 1);
} else {
bat_led_set(BAT_LED_BLUE, 0);
bat_led_set(BAT_LED_ORANGE, 0);
}
return EC_SUCCESS;
} else if (EC_LED_ID_POWER_LED == led_id) {
if (brightness[EC_LED_COLOR_BLUE] != 0) {
bat_led_set(PWR_LED_BLUE, 1);
bat_led_set(PWR_LED_ORANGE, 0);
} else if (brightness[EC_LED_COLOR_AMBER] != 0) {
bat_led_set(PWR_LED_BLUE, 0);
bat_led_set(PWR_LED_ORANGE, 1);
} else {
bat_led_set(PWR_LED_BLUE, 0);
bat_led_set(PWR_LED_ORANGE, 0);
}
return EC_SUCCESS;
} else {
return EC_ERROR_UNKNOWN;
}
}
static unsigned blink_second;
static void elm_led_set_power(void)
{
/*
* PWR LED behavior:
* Power on: Blue ON
* Suspend: Orange in breeze mode ( 1 sec on/ 3 sec off)
* Power off: OFF
*/
if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) {
bat_led_set(PWR_LED_BLUE, 0);
bat_led_set(PWR_LED_ORANGE, 0);
} else if (chipset_in_state(CHIPSET_STATE_ON)) {
bat_led_set(PWR_LED_BLUE, 1);
bat_led_set(PWR_LED_ORANGE, 0);
} else if (chipset_in_state(CHIPSET_STATE_SUSPEND)) {
bat_led_set(PWR_LED_BLUE, 0);
bat_led_set(PWR_LED_ORANGE,
(blink_second & 3) ? 0 : 1);
}
}
static void elm_led_set_battery(void)
{
/*
* BAT LED behavior:
* - Fully charged / normal idle: Blue ON
* - Charging: Orange ON
* - Battery discharging capacity<10%, Orange blink(1:3)
* < 3%, Orange blink(1:1)
* - Battery error: Orange blink(1:1)
* - Factory force idle: Blue 2 sec, Orange 2 sec
*/
uint32_t charge_flags = charge_get_flags();
int remaining_capacity;
int full_charge_capacity;
int permillage;
/* Make the percentage approximate to UI shown */
remaining_capacity = *(int *)host_get_memmap(EC_MEMMAP_BATT_CAP);
full_charge_capacity = *(int *)host_get_memmap(EC_MEMMAP_BATT_LFCC);
permillage = !full_charge_capacity ? 0 :
(1000 * remaining_capacity) / full_charge_capacity;
switch (charge_get_state()) {
case PWR_STATE_CHARGE:
if (permillage < FULL_BATTERY_PERMILLAGE) {
bat_led_set(BAT_LED_BLUE, 0);
bat_led_set(BAT_LED_ORANGE, 1);
} else {
bat_led_set(BAT_LED_BLUE, 1);
bat_led_set(BAT_LED_ORANGE, 0);
}
break;
case PWR_STATE_CHARGE_NEAR_FULL:
bat_led_set(BAT_LED_BLUE, 1);
bat_led_set(BAT_LED_ORANGE, 0);
break;
case PWR_STATE_DISCHARGE:
bat_led_set(BAT_LED_BLUE, 0);
if (!chipset_in_state(CHIPSET_STATE_ANY_OFF) &&
permillage <= CRITICAL_LOW_BATTERY_PERMILLAGE)
bat_led_set(BAT_LED_ORANGE,
(blink_second & 1) ? 0 : 1);
else if (!chipset_in_state(CHIPSET_STATE_ANY_OFF) &&
permillage <= LOW_BATTERY_PERMILLAGE)
bat_led_set(BAT_LED_ORANGE,
(blink_second & 3) ? 0 : 1);
else
bat_led_set(BAT_LED_ORANGE, 0);
break;
case PWR_STATE_ERROR:
bat_led_set(BAT_LED_BLUE, 0);
bat_led_set(BAT_LED_ORANGE, (blink_second & 1) ? 0 : 1);
break;
case PWR_STATE_IDLE: /* Ext. power connected in IDLE. */
if (charge_flags & CHARGE_FLAG_FORCE_IDLE) {
bat_led_set(BAT_LED_BLUE, (blink_second & 2) ? 0 : 1);
bat_led_set(BAT_LED_ORANGE, (blink_second & 2) ? 1 : 0);
} else {
bat_led_set(BAT_LED_BLUE, 1);
bat_led_set(BAT_LED_ORANGE, 0);
}
break;
default:
/* Other states don't alter LED behavior */
break;
}
}
/**
* Called by hook task every 1 sec
*/
static void led_second(void)
{
blink_second++;
if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED))
elm_led_set_power();
if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
elm_led_set_battery();
}
DECLARE_HOOK(HOOK_SECOND, led_second, HOOK_PRIO_DEFAULT);
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