diff options
Diffstat (limited to 'board/aleena/led.c')
-rw-r--r-- | board/aleena/led.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/board/aleena/led.c b/board/aleena/led.c new file mode 100644 index 0000000000..1b9c043043 --- /dev/null +++ b/board/aleena/led.c @@ -0,0 +1,153 @@ +/* Copyright 2018 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. + * + * LED control for Aleena + */ + +#include "battery.h" +#include "charge_state.h" +#include "chipset.h" +#include "ec_commands.h" +#include "extpower.h" +#include "gpio.h" +#include "hooks.h" +#include "host_command.h" +#include "led_common.h" +#include "util.h" +#include "system.h" + +#define BAT_LED_ON 0 +#define BAT_LED_OFF 1 + +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 led_set_color_battery(enum led_color color) +{ + switch (color) { + case LED_OFF: + gpio_set_level(GPIO_BAT_LED_WHITE_L, BAT_LED_OFF); + gpio_set_level(GPIO_BAT_LED_AMBER_L, BAT_LED_OFF); + break; + case LED_WHITE: + gpio_set_level(GPIO_BAT_LED_WHITE_L, BAT_LED_ON); + gpio_set_level(GPIO_BAT_LED_AMBER_L, BAT_LED_OFF); + break; + case LED_AMBER: + gpio_set_level(GPIO_BAT_LED_WHITE_L, BAT_LED_OFF); + gpio_set_level(GPIO_BAT_LED_AMBER_L, 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_WHITE] = 1; + brightness_range[EC_LED_COLOR_AMBER] = 1; +} + +static int led_set_color(enum ec_led_id led_id, enum led_color color) +{ + int rv; + + switch (led_id) { + case EC_LED_ID_BATTERY_LED: + rv = 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_WHITE] != 0) + led_set_color(led_id, LED_WHITE); + else if (brightness[EC_LED_COLOR_AMBER] != 0) + led_set_color(led_id, LED_AMBER); + else + led_set_color(led_id, LED_OFF); + + return EC_SUCCESS; +} + +static void led_set_battery(void) +{ + static int battery_ticks; + static int power_ticks; + uint32_t chflags = charge_get_flags(); + + battery_ticks++; + + /* override battery led for system suspend */ + if (chipset_in_state(CHIPSET_STATE_SUSPEND | + CHIPSET_STATE_STANDBY) && + charge_get_state() != PWR_STATE_CHARGE) { + led_set_color_battery(power_ticks++ & 0x4 ? + LED_WHITE : LED_OFF); + return; + } + + power_ticks = 0; + + switch (charge_get_state()) { + case PWR_STATE_CHARGE: + led_set_color_battery(LED_AMBER); + break; + case PWR_STATE_DISCHARGE_FULL: + if (extpower_is_present()) { + led_set_color_battery(LED_WHITE); + break; + } + /* Intentional fall-through */ + case PWR_STATE_DISCHARGE: + /* + * Blink white light (1 sec on, 1 sec off) + * when battery capacity is less than 10% + */ + if (charge_get_percent() < 10) + led_set_color_battery( + (battery_ticks & 0x4) ? LED_WHITE : LED_OFF); + else + led_set_color_battery(LED_OFF); + break; + case PWR_STATE_ERROR: + led_set_color_battery( + (battery_ticks & 0x2) ? LED_WHITE : LED_OFF); + break; + case PWR_STATE_CHARGE_NEAR_FULL: + led_set_color_battery(LED_WHITE); + break; + case PWR_STATE_IDLE: /* External power connected in IDLE */ + if (chflags & CHARGE_FLAG_FORCE_IDLE) + led_set_color_battery( + (battery_ticks & 0x4) ? LED_AMBER : LED_OFF); + else + led_set_color_battery(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)) + led_set_battery(); +} +DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT); |