diff options
Diffstat (limited to 'common/led_wolf.c')
| -rw-r--r-- | common/led_wolf.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/common/led_wolf.c b/common/led_wolf.c new file mode 100644 index 0000000000..9212d467ac --- /dev/null +++ b/common/led_wolf.c @@ -0,0 +1,76 @@ +/* Copyright (c) 2013 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 Wolf. + */ + +#include "battery.h" +#include "charge_state.h" +#include "chipset.h" +#include "gpio.h" +#include "hooks.h" + +enum led_color { + LED_OFF = 0, + LED_WHITE, + 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_LED0_L, 1); + gpio_set_level(GPIO_BAT_LED1_L, 1); + break; + case LED_WHITE: + gpio_set_level(GPIO_BAT_LED0_L, 0); + gpio_set_level(GPIO_BAT_LED1_L, 1); + break; + case LED_AMBER: + gpio_set_level(GPIO_BAT_LED0_L, 1); + gpio_set_level(GPIO_BAT_LED1_L, 0); + break; + default: + return EC_ERROR_UNKNOWN; + } + return EC_SUCCESS; +} + +/* Called by hook task every 250mSec */ +static void led_tick(void) +{ + static int ticks; + uint32_t chflags = charge_get_flags(); + + ticks++; + + switch (charge_get_state()) { + case PWR_STATE_CHARGE: + bat_led_set_color(LED_WHITE); + break; + case PWR_STATE_CHARGE_NEAR_FULL: + bat_led_set_color(LED_OFF); + break; + case PWR_STATE_DISCHARGE: + bat_led_set_color(LED_AMBER); + break; + case PWR_STATE_ERROR: + /*FIXME Now keep blink amber till the new spec arrival */ + bat_led_set_color((ticks & 0x2) ? LED_AMBER : LED_OFF); + break; + case PWR_STATE_IDLE: + if (chflags & CHARGE_FLAG_FORCE_IDLE) + bat_led_set_color((ticks & 0x4) ? LED_WHITE : LED_OFF); + else + bat_led_set_color(LED_OFF); + break; + default: + /* Other states don't alter LED behavior */ + break; + } +} +DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT); + |