137 lines
3.2 KiB
C
137 lines
3.2 KiB
C
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/* Copyright 2017 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_manager.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 "system.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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#define LED_TOTAL_TICKS 16
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#define LED_ON_TICKS 8
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const enum ec_led_id supported_led_ids[] = {
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EC_LED_ID_POWER_LED,
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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_RED,
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LED_GREEN,
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LED_BLUE,
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/* Number of colors, not a color itself */
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LED_COLOR_COUNT
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};
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/**
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* Set LED color
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*
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* @param color Enumerated color value
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*/
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static void set_color(enum led_color color)
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{
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gpio_set_level(GPIO_POWER_LED, !(color == LED_BLUE));
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gpio_set_level(GPIO_LED_ACIN, !(color == LED_GREEN));
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gpio_set_level(GPIO_LED_CHARGE, !(color == LED_RED));
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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_RED] = 1;
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brightness_range[EC_LED_COLOR_BLUE] = 1;
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brightness_range[EC_LED_COLOR_GREEN] = 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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gpio_set_level(GPIO_POWER_LED, !brightness[EC_LED_COLOR_BLUE]);
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gpio_set_level(GPIO_LED_ACIN, !brightness[EC_LED_COLOR_GREEN]);
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gpio_set_level(GPIO_LED_CHARGE, !brightness[EC_LED_COLOR_RED]);
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return EC_SUCCESS;
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}
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static void nautilus_led_set_power_battery(void)
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{
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static unsigned int power_ticks;
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enum led_color cur_led_color = LED_RED;
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enum charge_state chg_state = charge_get_state();
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int charge_percent = charge_get_percent();
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if (chipset_in_state(CHIPSET_STATE_ON)) {
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set_color(LED_BLUE);
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return;
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}
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/* Flash red on critical battery, which usually inhibits AP power-on. */
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if (battery_is_present() != BP_YES ||
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charge_percent < CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON) {
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set_color(((power_ticks++ % LED_TOTAL_TICKS) < LED_ON_TICKS) ?
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LED_RED : LED_OFF);
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return;
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}
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/* CHIPSET_STATE_OFF */
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switch (chg_state) {
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case PWR_STATE_DISCHARGE:
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if ((charge_get_flags() & CHARGE_FLAG_EXTERNAL_POWER) &&
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charge_percent >= BATTERY_LEVEL_NEAR_FULL)
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cur_led_color = LED_GREEN;
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else
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cur_led_color = LED_OFF;
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break;
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case PWR_STATE_CHARGE:
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cur_led_color = LED_RED;
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break;
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case PWR_STATE_ERROR:
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cur_led_color = ((power_ticks++ % LED_TOTAL_TICKS)
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< LED_ON_TICKS) ? LED_RED : LED_GREEN;
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break;
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case PWR_STATE_CHARGE_NEAR_FULL:
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case PWR_STATE_IDLE:
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if(charge_get_flags() & CHARGE_FLAG_EXTERNAL_POWER)
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cur_led_color = LED_GREEN;
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else
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cur_led_color = LED_OFF;
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break;
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default:
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cur_led_color = LED_RED;
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break;
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}
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set_color(cur_led_color);
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if (chg_state != PWR_STATE_ERROR)
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power_ticks = 0;
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}
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/**
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* Called by hook task every 250 ms
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*/
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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_POWER_LED) &&
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led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED)) {
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nautilus_led_set_power_battery();
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}
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}
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DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
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