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/* Copyright 2020 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 Kappa
*/
#include "charge_state.h"
#include "extpower.h"
#include "hooks.h"
#include "ioexpander.h"
#include "led_common.h"
#define BAT_LED_ON 0
#define BAT_LED_OFF 1
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_AMBER,
LED_WHITE,
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:
ioex_set_level(IOEX_BAT_LED_WHITE_L, BAT_LED_OFF);
ioex_set_level(IOEX_BAT_LED_AMBER_L, BAT_LED_OFF);
break;
case LED_WHITE:
ioex_set_level(IOEX_BAT_LED_WHITE_L, BAT_LED_ON);
ioex_set_level(IOEX_BAT_LED_AMBER_L, BAT_LED_OFF);
break;
case LED_AMBER:
ioex_set_level(IOEX_BAT_LED_WHITE_L, BAT_LED_OFF);
ioex_set_level(IOEX_BAT_LED_AMBER_L, 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_WHITE] = 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_WHITE] != 0)
led_set_color(led_id, LED_WHITE);
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 power_ticks;
uint32_t chflags = charge_get_flags();
battery_ticks++;
/* override battery led for system suspend */
if (chipset_in_state(CHIPSET_STATE_SUSPEND |
CHIPSET_STATE_STANDBY) &&
charge_get_state() != PWR_STATE_CHARGE) {
led_set_color_battery(power_ticks++ & 0x2 ?
LED_WHITE : LED_OFF);
return;
}
power_ticks = 0;
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_WHITE);
break;
}
/* Intentional fall-through */
case PWR_STATE_DISCHARGE:
/*
* Blink white light (1 sec on, 1 sec off)
* when battery capacity is less than 10%
*/
if (charge_get_percent() < 10)
led_set_color_battery(
(battery_ticks & 0x2) ? LED_WHITE : LED_OFF);
else
led_set_color_battery(LED_OFF);
break;
case PWR_STATE_ERROR:
led_set_color_battery(
(battery_ticks % 0x2) ? LED_WHITE : LED_OFF);
break;
case PWR_STATE_CHARGE_NEAR_FULL:
led_set_color_battery(LED_WHITE);
break;
case PWR_STATE_IDLE: /* External power connected in IDLE */
if (chflags & CHARGE_FLAG_FORCE_IDLE)
led_set_color_battery(
(battery_ticks & 0x2) ? LED_AMBER : LED_OFF);
else
led_set_color_battery(LED_WHITE);
break;
default:
/* Other states don't alter LED behavior */
break;
}
}
/* Called by hook task every TICK */
static void led_tick(void)
{
if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
led_set_battery();
}
DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
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