146 lines
3.4 KiB
C
146 lines
3.4 KiB
C
/* Copyright 2015 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Power and battery LED control.
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*/
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#include "battery.h"
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#include "charge_state.h"
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#include "chipset.h"
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#include "ec_commands.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "host_command.h"
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#include "led_common.h"
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#include "util.h"
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#define BAT_LED_ON 1
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#define BAT_LED_OFF 0
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const enum ec_led_id supported_led_ids[] = {
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EC_LED_ID_BATTERY_LED};
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const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
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enum led_color {
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LED_OFF = 0,
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LED_AMBER,
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LED_WHITE,
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LED_COLOR_COUNT /* Number of colors, not a color itself */
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};
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static int bat_led_set_color(enum led_color color)
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{
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switch (color) {
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case LED_OFF:
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gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_OFF);
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gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_OFF);
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break;
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case LED_AMBER:
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gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_ON);
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gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_OFF);
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break;
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case LED_WHITE:
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gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_OFF);
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gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_ON);
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break;
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default:
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return EC_ERROR_UNKNOWN;
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}
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return EC_SUCCESS;
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}
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void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
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{
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brightness_range[EC_LED_COLOR_YELLOW] = 1;
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brightness_range[EC_LED_COLOR_WHITE] = 1;
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}
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int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
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{
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switch (led_id) {
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case EC_LED_ID_BATTERY_LED:
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if (brightness[EC_LED_COLOR_WHITE] != 0)
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bat_led_set_color(LED_WHITE);
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else if (brightness[EC_LED_COLOR_YELLOW] != 0)
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bat_led_set_color(LED_AMBER);
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else
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bat_led_set_color(LED_OFF);
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break;
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default:
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break;
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}
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return EC_SUCCESS;
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}
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static void board_led_set_battery(void)
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{
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static int battery_ticks;
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uint32_t chflags = charge_get_flags();
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static int power_ticks;
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static int previous_state_suspend;
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battery_ticks++;
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power_ticks++;
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if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND)) {
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/*
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* Reset ticks if entering suspend so LED turns white
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* as soon as possible.
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*/
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if (!previous_state_suspend)
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power_ticks = 0;
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if (charge_get_state() == PWR_STATE_CHARGE)
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/* Always indicate when charging, even in suspend. */
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bat_led_set_color(LED_AMBER);
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else
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/* Blink once every one second. */
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bat_led_set_color((power_ticks & 0x4) ?
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LED_WHITE : LED_OFF);
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previous_state_suspend = 1;
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return;
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}
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previous_state_suspend = 0;
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switch (charge_get_state()) {
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case PWR_STATE_CHARGE:
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bat_led_set_color(LED_AMBER);
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break;
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case PWR_STATE_DISCHARGE:
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if (charge_get_percent() < 12)
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bat_led_set_color(
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(battery_ticks & 0x4) ? LED_WHITE : LED_OFF);
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else
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bat_led_set_color(LED_OFF);
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break;
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case PWR_STATE_ERROR:
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bat_led_set_color((battery_ticks & 0x2) ? LED_WHITE : LED_OFF);
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break;
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case PWR_STATE_CHARGE_NEAR_FULL:
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bat_led_set_color(LED_WHITE);
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break;
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case PWR_STATE_IDLE: /* External power connected in IDLE */
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if (chflags & CHARGE_FLAG_FORCE_IDLE)
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bat_led_set_color(
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(battery_ticks & 0x4) ? LED_AMBER : LED_OFF);
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else
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bat_led_set_color(LED_WHITE);
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break;
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default:
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/* Other states don't alter LED behavior */
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break;
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}
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}
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/* Called by hook task every TICK */
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static void led_tick(void)
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{
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if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
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board_led_set_battery();
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}
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DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
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