diff options
Diffstat (limited to 'board/buddy/led.c')
| -rw-r--r-- | board/buddy/led.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/board/buddy/led.c b/board/buddy/led.c new file mode 100644 index 0000000000..199da7600c --- /dev/null +++ b/board/buddy/led.c @@ -0,0 +1,186 @@ +/* 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 for Buddy. + */ + +#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 LED_TOTAL_TICKS 16 +#define LED_ON_TICKS 4 + +enum led_color { + LED_OFF = 0, + LED_BLUE, + LED_AMBER, + LED_PINK, + + LED_COLOR_COUNT /* Number of colors, not a color itself */ +}; + +const enum ec_led_id supported_led_ids[] = { + EC_LED_ID_POWER_LED, EC_LED_ID_BATTERY_LED}; + +const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids); + +static int buddy_led_set_gpio(enum led_color color, + enum gpio_signal gpio_led_blue_l, + enum gpio_signal gpio_led_amber_l) +{ + switch (color) { + case LED_OFF: + gpio_set_level(gpio_led_blue_l, 1); + gpio_set_level(gpio_led_amber_l, 1); + break; + case LED_BLUE: + gpio_set_level(gpio_led_blue_l, 0); + gpio_set_level(gpio_led_amber_l, 1); + break; + case LED_AMBER: + gpio_set_level(gpio_led_blue_l, 1); + gpio_set_level(gpio_led_amber_l, 0); + break; + case LED_PINK: + gpio_set_level(gpio_led_blue_l, 0); + gpio_set_level(gpio_led_amber_l, 0); + break; + default: + return EC_ERROR_UNKNOWN; + } + return EC_SUCCESS; +} + +static int buddy_led_set_color_battery(enum led_color color) +{ + return buddy_led_set_gpio(color, GPIO_BAT_LED0_L, GPIO_BAT_LED1_L); +} + +static int buddy_led_set_color_power(enum led_color color) +{ + return buddy_led_set_gpio(color, GPIO_PWR_LED0_L, GPIO_PWR_LED1_L); +} + +static int buddy_led_set_color(enum ec_led_id led_id, enum led_color color) +{ + int rv; + + led_auto_control(led_id, 0); + switch (led_id) { + case EC_LED_ID_BATTERY_LED: + rv = buddy_led_set_color_battery(color); + break; + case EC_LED_ID_POWER_LED: + rv = buddy_led_set_color_power(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_BLUE] != 0 && + brightness[EC_LED_COLOR_YELLOW] != 0) + buddy_led_set_color(led_id, LED_PINK); + else if (brightness[EC_LED_COLOR_BLUE] != 0) + buddy_led_set_color(led_id, LED_BLUE); + else if (brightness[EC_LED_COLOR_YELLOW] != 0) + buddy_led_set_color(led_id, LED_AMBER); + else + buddy_led_set_color(led_id, LED_OFF); + + 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; +} + +static void buddy_led_set_power(void) +{ + static int power_ticks; + static int previous_state_suspend; + + power_ticks++; + + if (chipset_in_state(CHIPSET_STATE_SUSPEND)) { + /* Reset ticks if entering suspend so LED turns amber + * as soon as possible. */ + if (!previous_state_suspend) + power_ticks = 0; + + /* Blink once every four seconds. */ + buddy_led_set_color_power( + (power_ticks % LED_TOTAL_TICKS < LED_ON_TICKS) ? + LED_AMBER : LED_OFF); + + previous_state_suspend = 1; + return; + } + + previous_state_suspend = 0; + + if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) + buddy_led_set_color_power(LED_OFF); + else if (chipset_in_state(CHIPSET_STATE_ON)) + buddy_led_set_color_power(LED_BLUE); +} + +static void buddy_led_set_battery(void) +{ + static int battery_ticks; + uint32_t chflags = charge_get_flags(); + + battery_ticks++; + + switch (charge_get_state()) { + case PWR_STATE_CHARGE: + buddy_led_set_color_battery(LED_AMBER); + break; + case PWR_STATE_CHARGE_NEAR_FULL: + buddy_led_set_color_battery(LED_BLUE); + break; + case PWR_STATE_DISCHARGE: + buddy_led_set_color_battery(LED_OFF); + break; + case PWR_STATE_ERROR: + buddy_led_set_color_battery( + (battery_ticks % LED_TOTAL_TICKS < LED_ON_TICKS) ? + LED_AMBER : LED_OFF); + break; + case PWR_STATE_IDLE: /* External power connected in IDLE. */ + if (chflags & CHARGE_FLAG_FORCE_IDLE) + buddy_led_set_color_battery( + (battery_ticks & 0x4) ? LED_BLUE : LED_OFF); + else + buddy_led_set_color_battery(LED_BLUE); + break; + default: + /* Other states don't alter LED behavior */ + break; + } +} + +/* Called by hook task every 250mSec */ +static void led_tick(void) +{ + if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED)) + buddy_led_set_power(); + + if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED)) + buddy_led_set_battery(); +} +DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT); |