145 lines
3.6 KiB
C
145 lines
3.6 KiB
C
/* 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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* Battery LED control for Scarlet board.
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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 "hooks.h"
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#include "led_common.h"
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#include "lid_switch.h"
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#include "pwm.h"
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#include "util.h"
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/* LEDs on Scarlet are active low. */
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#define BAT_LED_ON 0
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#define BAT_LED_OFF 1
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const enum ec_led_id supported_led_ids[] = { 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_AMBER,
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LED_GREEN,
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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_GREEN, BAT_LED_OFF);
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gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_OFF);
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break;
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case LED_RED:
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gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_OFF);
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gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_ON);
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break;
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case LED_AMBER:
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gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_ON);
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gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_ON);
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break;
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case LED_GREEN:
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gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_ON);
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gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_OFF);
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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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static void scarlet_led_set_battery(void)
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{
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static int battery_second;
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uint32_t chflags = charge_get_flags();
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battery_second++;
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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() < 3)
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bat_led_set_color((battery_second & 1)
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? LED_OFF : LED_AMBER);
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else if (charge_get_percent() < 10)
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bat_led_set_color((battery_second & 3)
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? LED_OFF : LED_AMBER);
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else if (charge_get_percent() >= BATTERY_LEVEL_NEAR_FULL &&
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(chflags & CHARGE_FLAG_EXTERNAL_POWER))
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bat_led_set_color(LED_GREEN);
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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(LED_RED);
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break;
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case PWR_STATE_CHARGE_NEAR_FULL:
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bat_led_set_color(LED_GREEN);
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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_second & 0x2) ? LED_GREEN : LED_AMBER);
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else
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bat_led_set_color(LED_GREEN);
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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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void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
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{
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if (led_id == EC_LED_ID_BATTERY_LED) {
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brightness_range[EC_LED_COLOR_RED] = 1;
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brightness_range[EC_LED_COLOR_GREEN] = 1;
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}
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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 (led_id == EC_LED_ID_BATTERY_LED) {
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gpio_set_level(GPIO_BAT_LED_RED,
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(brightness[EC_LED_COLOR_RED] != 0) ?
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BAT_LED_ON : BAT_LED_OFF);
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gpio_set_level(GPIO_BAT_LED_GREEN,
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(brightness[EC_LED_COLOR_GREEN] != 0) ?
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BAT_LED_ON : BAT_LED_OFF);
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return EC_SUCCESS;
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}
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return EC_ERROR_UNKNOWN;
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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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if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
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scarlet_led_set_battery();
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}
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DECLARE_HOOK(HOOK_SECOND, led_second, HOOK_PRIO_DEFAULT);
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void led_control(enum ec_led_id led_id, enum ec_led_state state)
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{
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if ((led_id != EC_LED_ID_RECOVERY_HW_REINIT_LED) &&
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(led_id != EC_LED_ID_SYSRQ_DEBUG_LED))
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return;
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if (state == LED_STATE_RESET) {
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led_auto_control(EC_LED_ID_BATTERY_LED, 1);
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return;
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}
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led_auto_control(EC_LED_ID_BATTERY_LED, 0);
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bat_led_set_color(state ? LED_AMBER : LED_OFF);
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}
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