diff options
Diffstat (limited to 'board/llama/led.c')
-rw-r--r-- | board/llama/led.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/board/llama/led.c b/board/llama/led.c new file mode 100644 index 0000000000..fd86cab223 --- /dev/null +++ b/board/llama/led.c @@ -0,0 +1,138 @@ +/* Copyright 2015 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 LLAMA Board. + */ + +#include "battery.h" +#include "charge_state.h" +#include "chipset.h" +#include "gpio.h" +#include "hooks.h" +#include "led_common.h" +#include "util.h" + +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_GREEN = 0, + LED_ORANGE, + LED_COLOR_COUNT /* Number of colors, not a color itself */ +}; + +static int bat_led_set(enum led_color color, int on) +{ + switch (color) { + case LED_GREEN: + gpio_set_level(GPIO_BAT_LED0, on ? 0 : 1); + break; + case LED_ORANGE: + gpio_set_level(GPIO_BAT_LED1, on ? 0 : 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_GREEN] = 1; + brightness_range[EC_LED_COLOR_YELLOW] = 1; +} + +int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness) +{ + if (EC_LED_ID_BATTERY_LED == led_id) { + if (brightness[EC_LED_COLOR_GREEN] != 0) { + bat_led_set(LED_GREEN, 1); + bat_led_set(LED_ORANGE, 0); + } else if (brightness[EC_LED_COLOR_YELLOW] != 0) { + bat_led_set(LED_GREEN, 1); + bat_led_set(LED_ORANGE, 1); + } else { + bat_led_set(LED_GREEN, 0); + bat_led_set(LED_ORANGE, 0); + } + return EC_SUCCESS; + } else { + return EC_ERROR_UNKNOWN; + } +} + +static void llama_led_set_power(void) +{ + static int power_second; + + power_second++; + + /* PWR LED behavior: + * Power on: Green + * Suspend: Green in breeze mode ( 1 sec on/ 3 sec off) + * Power off: OFF + */ + if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) + bat_led_set(LED_GREEN, 0); + else if (chipset_in_state(CHIPSET_STATE_ON)) + bat_led_set(LED_GREEN, 1); + else if (chipset_in_state(CHIPSET_STATE_SUSPEND)) + bat_led_set(LED_GREEN, (power_second & 3) ? 0 : 1); +} + +static void llama_led_set_battery(void) +{ + static int battery_second; + + battery_second++; + + /* BAT LED behavior: + * Fully charged / idle: Off + * 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(LED_ORANGE, 1); + break; + case PWR_STATE_CHARGE_NEAR_FULL: + bat_led_set(LED_ORANGE, 1); + break; + case PWR_STATE_DISCHARGE: + if (charge_get_percent() < 3) + bat_led_set(LED_ORANGE, (battery_second & 1) ? 0 : 1); + else if (charge_get_percent() < 10) + bat_led_set(LED_ORANGE, (battery_second & 3) ? 0 : 1); + else + bat_led_set(LED_ORANGE, 0); + break; + case PWR_STATE_ERROR: + bat_led_set(LED_ORANGE, (battery_second & 1) ? 0 : 1); + break; + case PWR_STATE_IDLE: /* External power connected in IDLE. */ + bat_led_set(LED_ORANGE, 0); + 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)) + llama_led_set_power(); + if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED)) + llama_led_set_battery(); +} + +DECLARE_HOOK(HOOK_SECOND, led_second, HOOK_PRIO_DEFAULT); |