diff options
Diffstat (limited to 'board/big/led.c')
| -rw-r--r-- | board/big/led.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/board/big/led.c b/board/big/led.c new file mode 100644 index 0000000000..0d3b33567d --- /dev/null +++ b/board/big/led.c @@ -0,0 +1,170 @@ +/* Copyright (c) 2014 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. + * + * Battery LED and Power LED control for Big + */ + +#include "gpio.h" +#include "hooks.h" +#include "battery.h" +#include "charge_state.h" +#include "chipset.h" +#include "led_common.h" +#include "util.h" + +const enum ec_led_id supported_led_ids[] = { + EC_LED_ID_BATTERY_LED, EC_LED_ID_POWER_LED}; + +const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids); + +enum led_color { + LED_OFF = 0, + LED_BLUE, + LED_ORANGE, + 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_CHARGING, 0); + gpio_set_level(GPIO_BAT_LED1, 0); + break; + case LED_BLUE: + gpio_set_level(GPIO_CHARGING, 0); + gpio_set_level(GPIO_BAT_LED1, 1); + break; + case LED_ORANGE: + gpio_set_level(GPIO_CHARGING, 1); + gpio_set_level(GPIO_BAT_LED1, 0); + break; + default: + return EC_ERROR_UNKNOWN; + } + return EC_SUCCESS; +} + +static int pwr_led_set_color(enum led_color color) +{ + switch (color) { + case LED_OFF: + gpio_set_level(GPIO_LED_POWER_L, 0); + gpio_set_level(GPIO_PWR_LED0, 0); + break; + case LED_BLUE: + gpio_set_level(GPIO_LED_POWER_L, 1); + gpio_set_level(GPIO_PWR_LED0, 0); + break; + case LED_ORANGE: + gpio_set_level(GPIO_LED_POWER_L, 0); + gpio_set_level(GPIO_PWR_LED0, 1); + break; + default: + return EC_ERROR_UNKNOWN; + } + return EC_SUCCESS; +} + +void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range) +{ + /* Ignoring led_id as both leds support the same colors */ + brightness_range[EC_LED_COLOR_BLUE] = 1; + brightness_range[EC_LED_COLOR_YELLOW] = 1; +} + +int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness) +{ + switch (led_id) { + case EC_LED_ID_BATTERY_LED: + if (brightness[EC_LED_COLOR_BLUE] != 0) + bat_led_set_color(LED_BLUE); + else if (brightness[EC_LED_COLOR_YELLOW] != 0) + bat_led_set_color(LED_ORANGE); + else + bat_led_set_color(LED_OFF); + break; + case EC_LED_ID_POWER_LED: + if (brightness[EC_LED_COLOR_BLUE] != 0) + pwr_led_set_color(LED_BLUE); + else if (brightness[EC_LED_COLOR_YELLOW] != 0) + pwr_led_set_color(LED_ORANGE); + else + pwr_led_set_color(LED_OFF); + break; + default: + return EC_ERROR_UNKNOWN; + } + return EC_SUCCESS; +} + +static void big_led_set_power(void) +{ + static int power_second; + + power_second++; + + /* PWR LED behavior: + * Power on: Blue + * Suspend: Orange in breeze mode ( 1 sec on/ 3 sec off) + * Power off: OFF + */ + if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) + pwr_led_set_color(LED_OFF); + else if (chipset_in_state(CHIPSET_STATE_ON)) + pwr_led_set_color(LED_BLUE); + else if (chipset_in_state(CHIPSET_STATE_SUSPEND)) + pwr_led_set_color((power_second & 3) ? LED_OFF : LED_ORANGE); +} + +static void big_led_set_battery(void) +{ + static int battery_second; + + battery_second++; + + /* BAT LED behavior: + * Fully charged: Blue + * Under charging: Orange + * Battery low (10%): Orange in breeze mode (1 sec on, 3 sec off) + * Battery critical low (less than 3%) or abnormal battery + * situation: Orange in blinking mode (1 sec on, 1 sec off) + * Using battery or not connected to AC power: OFF + */ + switch (charge_get_state()) { + case PWR_STATE_CHARGE: + bat_led_set_color(LED_ORANGE); + break; + case PWR_STATE_DISCHARGE: + if (charge_get_percent() < 3) + bat_led_set_color((battery_second & 1) + ? LED_OFF : LED_ORANGE); + else if (charge_get_percent() < 10) + bat_led_set_color((battery_second & 3) + ? LED_OFF : LED_ORANGE); + else + bat_led_set_color(LED_OFF); + break; + case PWR_STATE_ERROR: + bat_led_set_color((battery_second & 1) ? LED_OFF : LED_ORANGE); + break; + case PWR_STATE_CHARGE_NEAR_FULL: + bat_led_set_color(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_POWER_LED)) + big_led_set_power(); + if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED)) + big_led_set_battery(); +} +DECLARE_HOOK(HOOK_SECOND, led_second, HOOK_PRIO_DEFAULT); + |