156 lines
3.8 KiB
C
156 lines
3.8 KiB
C
/* Copyright 2016 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 for Reef
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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 "extpower.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 0
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#define BAT_LED_OFF 1
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#define CRITICAL_LOW_BATTERY_PERCENTAGE 3
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#define LOW_BATTERY_PERCENTAGE 10
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#define LED_TOTAL_4SECS_TICKS 4
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#define LED_TOTAL_2SECS_TICKS 2
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#define LED_ON_1SEC_TICKS 1
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#define LED_ON_2SECS_TICKS 2
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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_BLUE,
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LED_AMBER,
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LED_COLOR_COUNT /* Number of colors, not a color itself */
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};
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static int led_set_color_battery(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_BLUE, BAT_LED_OFF);
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gpio_set_level(GPIO_BAT_LED_AMBER, BAT_LED_OFF);
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break;
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case LED_BLUE:
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gpio_set_level(GPIO_BAT_LED_BLUE, BAT_LED_ON);
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gpio_set_level(GPIO_BAT_LED_AMBER, 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_BLUE, BAT_LED_OFF);
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gpio_set_level(GPIO_BAT_LED_AMBER, 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_BLUE] = 1;
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brightness_range[EC_LED_COLOR_AMBER] = 1;
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}
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static int led_set_color(enum ec_led_id led_id, enum led_color color)
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{
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int rv;
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switch (led_id) {
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case EC_LED_ID_BATTERY_LED:
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rv = led_set_color_battery(color);
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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 rv;
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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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if (brightness[EC_LED_COLOR_BLUE] != 0)
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led_set_color(led_id, LED_BLUE);
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else if (brightness[EC_LED_COLOR_AMBER] != 0)
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led_set_color(led_id, LED_AMBER);
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else
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led_set_color(led_id, LED_OFF);
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return EC_SUCCESS;
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}
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static void led_set_battery(void)
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{
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static int battery_ticks;
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static int suspend_ticks;
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switch (charge_get_state()) {
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case PWR_STATE_CHARGE:
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led_set_color_battery(LED_AMBER);
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break;
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case PWR_STATE_DISCHARGE_FULL:
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if (extpower_is_present()) {
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led_set_color_battery(LED_BLUE);
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break;
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}
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/* Intentional fall-through */
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case PWR_STATE_DISCHARGE /* and PWR_STATE_DISCHARGE_FULL */:
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if (chipset_in_state(CHIPSET_STATE_ON)) {
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led_set_color_battery(LED_BLUE);
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} else if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND)) {
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/* Blink once every four seconds. */
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led_set_color_battery(
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(suspend_ticks % LED_TOTAL_4SECS_TICKS)
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< LED_ON_1SEC_TICKS ? LED_AMBER : LED_OFF);
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} else {
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led_set_color_battery(LED_OFF);
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}
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break;
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case PWR_STATE_ERROR:
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led_set_color_battery(
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(battery_ticks % LED_TOTAL_2SECS_TICKS <
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LED_ON_1SEC_TICKS) ? LED_AMBER : LED_OFF);
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break;
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case PWR_STATE_CHARGE_NEAR_FULL:
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led_set_color_battery(LED_BLUE);
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break;
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case PWR_STATE_IDLE: /* External power connected in IDLE */
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if (charge_get_flags() & CHARGE_FLAG_FORCE_IDLE)
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led_set_color_battery(
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(battery_ticks % LED_TOTAL_4SECS_TICKS <
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LED_ON_2SECS_TICKS) ? LED_AMBER : LED_BLUE);
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else
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led_set_color_battery(LED_BLUE);
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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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battery_ticks++;
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suspend_ticks++;
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}
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/* Called by hook task every 1 sec */
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static void led_second(void)
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{
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/*
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* Reference board only has one LED, so overload it to act as both
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* power LED and battery LED.
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*/
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if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
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led_set_battery();
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}
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DECLARE_HOOK(HOOK_SECOND, led_second, HOOK_PRIO_DEFAULT);
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