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Diffstat (limited to 'board/chell/led.c')
-rw-r--r-- | board/chell/led.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/board/chell/led.c b/board/chell/led.c new file mode 100644 index 0000000000..51808e9071 --- /dev/null +++ b/board/chell/led.c @@ -0,0 +1,145 @@ +/* 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. + * + * Power and battery LED control. + */ + +#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 + +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_AMBER, + LED_WHITE, + 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_RED, BAT_LED_OFF); + gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_OFF); + break; + case LED_AMBER: + gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_ON); + gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_OFF); + break; + case LED_WHITE: + gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_OFF); + gpio_set_level(GPIO_BAT_LED_GREEN, 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_YELLOW] = 1; + brightness_range[EC_LED_COLOR_WHITE] = 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_WHITE] != 0) + bat_led_set_color(LED_WHITE); + else if (brightness[EC_LED_COLOR_YELLOW] != 0) + bat_led_set_color(LED_AMBER); + else + bat_led_set_color(LED_OFF); + break; + default: + break; + } + + return EC_SUCCESS; +} + +static void board_led_set_battery(void) +{ + static int battery_ticks; + uint32_t chflags = charge_get_flags(); + static int power_ticks; + static int previous_state_suspend; + + battery_ticks++; + power_ticks++; + + if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND)) { + /* + * Reset ticks if entering suspend so LED turns white + * as soon as possible. + */ + if (!previous_state_suspend) + power_ticks = 0; + + if (charge_get_state() == PWR_STATE_CHARGE) + /* Always indicate when charging, even in suspend. */ + bat_led_set_color(LED_AMBER); + else + /* Blink once every one second. */ + bat_led_set_color((power_ticks & 0x4) ? + LED_WHITE : LED_OFF); + + previous_state_suspend = 1; + return; + } + previous_state_suspend = 0; + + switch (charge_get_state()) { + case PWR_STATE_CHARGE: + bat_led_set_color(LED_AMBER); + break; + case PWR_STATE_DISCHARGE: + if (charge_get_percent() < 12) + bat_led_set_color( + (battery_ticks & 0x4) ? LED_WHITE : LED_OFF); + else + bat_led_set_color(LED_OFF); + break; + case PWR_STATE_ERROR: + bat_led_set_color((battery_ticks & 0x2) ? LED_WHITE : LED_OFF); + break; + case PWR_STATE_CHARGE_NEAR_FULL: + bat_led_set_color(LED_WHITE); + break; + case PWR_STATE_IDLE: /* External power connected in IDLE */ + if (chflags & CHARGE_FLAG_FORCE_IDLE) + bat_led_set_color( + (battery_ticks & 0x4) ? LED_AMBER : LED_OFF); + else + bat_led_set_color(LED_WHITE); + break; + default: + /* Other states don't alter LED behavior */ + break; + } +} + +/* Called by hook task every TICK */ +static void led_tick(void) +{ + if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED)) + board_led_set_battery(); +} +DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT); |