diff options
Diffstat (limited to 'board/sentry/led.c')
| -rw-r--r-- | board/sentry/led.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/board/sentry/led.c b/board/sentry/led.c new file mode 100644 index 0000000000..6c856e01b6 --- /dev/null +++ b/board/sentry/led.c @@ -0,0 +1,157 @@ +/* Copyright 2016 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 Glados. + */ + +#include "battery.h" +#include "charge_state.h" +#include "chipset.h" +#include "ec_commands.h" +#include "gpio.h" +#include "hooks.h" +#include "host_command.h" +#include "led_common.h" +#include "util.h" + +#define BAT_LED_ON 1 +#define BAT_LED_OFF 0 + +#define CRITICAL_LOW_BATTERY_PERCENTAGE 3 +#define LOW_BATTERY_PERCENTAGE 10 + +#define LED_TOTAL_4SECS_TICKS 4 +#define LED_TOTAL_2SECS_TICKS 2 +#define LED_ON_1SEC_TICKS 1 +#define LED_ON_2SECS_TICKS 2 + +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_BLUE, + LED_AMBER, + LED_COLOR_COUNT /* Number of colors, not a color itself */ +}; + +static int bat_led_set_color(enum led_color color) +{ + switch (color) { + case LED_OFF: + gpio_set_level(GPIO_BAT_LED_BLUE, BAT_LED_OFF); + gpio_set_level(GPIO_BAT_LED_AMBER, BAT_LED_OFF); + break; + case LED_BLUE: + gpio_set_level(GPIO_BAT_LED_BLUE, BAT_LED_ON); + gpio_set_level(GPIO_BAT_LED_AMBER, BAT_LED_OFF); + break; + case LED_AMBER: + gpio_set_level(GPIO_BAT_LED_BLUE, BAT_LED_OFF); + gpio_set_level(GPIO_BAT_LED_AMBER, 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_BLUE] = 1; + brightness_range[EC_LED_COLOR_AMBER] = 1; +} + +static int sentry_led_set_color_battery(enum led_color color) +{ + return bat_led_set_color(color); +} + +static int sentry_led_set_color(enum ec_led_id led_id, enum led_color color) +{ + int rv; + + led_auto_control(led_id, 0); + switch (led_id) { + case EC_LED_ID_BATTERY_LED: + rv = sentry_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_BLUE] != 0) + sentry_led_set_color(led_id, LED_BLUE); + else if (brightness[EC_LED_COLOR_AMBER] != 0) + sentry_led_set_color(led_id, LED_AMBER); + else + sentry_led_set_color(led_id, LED_OFF); + + return EC_SUCCESS; +} + +static void sentry_led_set_battery(void) +{ + static int battery_ticks; + uint32_t chflags = charge_get_flags(); + + battery_ticks++; + + /* BAT LED behavior: + * Same as the chromeos spec + * Green/Amber for CHARGE_FLAG_FORCE_IDLE + */ + switch (charge_get_state()) { + case PWR_STATE_CHARGE: + sentry_led_set_color_battery(LED_AMBER); + break; + case PWR_STATE_DISCHARGE: + /* Less than 3%, blink one second every two second */ + if (charge_get_percent() < CRITICAL_LOW_BATTERY_PERCENTAGE) + sentry_led_set_color_battery( + (battery_ticks % LED_TOTAL_2SECS_TICKS < + LED_ON_1SEC_TICKS) ? LED_AMBER : LED_OFF); + /* Less than 10%, blink one second every four seconds */ + else if (charge_get_percent() < LOW_BATTERY_PERCENTAGE) + sentry_led_set_color_battery( + (battery_ticks % LED_TOTAL_4SECS_TICKS < + LED_ON_1SEC_TICKS) ? LED_AMBER : LED_OFF); + else + sentry_led_set_color_battery(LED_OFF); + break; + case PWR_STATE_ERROR: + sentry_led_set_color_battery( + (battery_ticks % LED_TOTAL_2SECS_TICKS < + LED_ON_1SEC_TICKS) ? LED_AMBER : LED_OFF); + break; + case PWR_STATE_CHARGE_NEAR_FULL: + sentry_led_set_color_battery(LED_BLUE); + break; + case PWR_STATE_IDLE: /* External power connected in IDLE */ + if (chflags & CHARGE_FLAG_FORCE_IDLE) + sentry_led_set_color_battery( + (battery_ticks % LED_TOTAL_4SECS_TICKS < + LED_ON_2SECS_TICKS) ? LED_AMBER : LED_BLUE); + else + sentry_led_set_color_battery(LED_BLUE); + break; + default: + /* Other states don't alter LED behavior */ + break; + } +} + +/** * Called by hook task every 1 sec */ +static void led_second(void) +{ + if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED)) + sentry_led_set_battery(); +} +DECLARE_HOOK(HOOK_SECOND, led_second, HOOK_PRIO_DEFAULT); |