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author | YH Lin <yueherngl@google.com> | 2017-05-15 10:46:16 -0700 |
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committer | chrome-bot <chrome-bot@chromium.org> | 2017-05-16 20:55:50 -0700 |
commit | 9fd645a0051fcf5e19a2cafe74aa2016897cd86b (patch) | |
tree | d9422885ddea8c68a0632e8cd0367e75810c4a0c /board/coral/led.c | |
parent | 7456475f99831bbeeca72c9c153e05b4558f832b (diff) | |
download | chrome-ec-9fd645a0051fcf5e19a2cafe74aa2016897cd86b.tar.gz |
ec: add initial coral related files
For now use the files from reef. To be changed later on.
BRANCH=none
BUG=b:38271615
TEST=emerge-coral chromeos-ec
Change-Id: Iff0a7b21b575d6394c27ff9959010496801fd056
Reviewed-on: https://chromium-review.googlesource.com/506117
Commit-Ready: YH Lin <yueherngl@chromium.org>
Tested-by: YH Lin <yueherngl@chromium.org>
Reviewed-by: Scott Collyer <scollyer@chromium.org>
Diffstat (limited to 'board/coral/led.c')
-rw-r--r-- | board/coral/led.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/board/coral/led.c b/board/coral/led.c new file mode 100644 index 0000000000..ebca865b48 --- /dev/null +++ b/board/coral/led.c @@ -0,0 +1,156 @@ +/* Copyright 2016 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 Coral + */ + +#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" + +#define BAT_LED_ON 0 +#define BAT_LED_OFF 1 + +#define CRITICAL_LOW_BATTERY_PERCENTAGE 3 +#define LOW_BATTERY_PERCENTAGE 10 + +#define LED_TOTAL_4SECS_TICKS 4 +#define LED_TOTAL_2SECS_TICKS 2 +#define LED_ON_1SEC_TICKS 1 +#define LED_ON_2SECS_TICKS 2 + +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_BLUE, + LED_AMBER, + 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_BLUE, BAT_LED_OFF); + gpio_set_level(GPIO_BAT_LED_AMBER, BAT_LED_OFF); + break; + case LED_BLUE: + gpio_set_level(GPIO_BAT_LED_BLUE, BAT_LED_ON); + gpio_set_level(GPIO_BAT_LED_AMBER, BAT_LED_OFF); + break; + case LED_AMBER: + gpio_set_level(GPIO_BAT_LED_BLUE, BAT_LED_OFF); + gpio_set_level(GPIO_BAT_LED_AMBER, 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_BLUE] = 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_BLUE] != 0) + led_set_color(led_id, LED_BLUE); + 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 suspend_ticks; + + 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_BLUE); + break; + } + /* Intentional fall-through */ + case PWR_STATE_DISCHARGE /* and PWR_STATE_DISCHARGE_FULL */: + if (chipset_in_state(CHIPSET_STATE_ON)) { + led_set_color_battery(LED_BLUE); + } else if (chipset_in_state(CHIPSET_STATE_SUSPEND | + CHIPSET_STATE_STANDBY)) { + /* Blink once every four seconds. */ + led_set_color_battery( + (suspend_ticks % LED_TOTAL_4SECS_TICKS) + < LED_ON_1SEC_TICKS ? LED_AMBER : LED_OFF); + } else { + led_set_color_battery(LED_OFF); + } + break; + case PWR_STATE_ERROR: + led_set_color_battery( + (battery_ticks % LED_TOTAL_2SECS_TICKS < + LED_ON_1SEC_TICKS) ? LED_AMBER : LED_OFF); + break; + case PWR_STATE_CHARGE_NEAR_FULL: + led_set_color_battery(LED_BLUE); + break; + case PWR_STATE_IDLE: /* External power connected in IDLE */ + if (charge_get_flags() & CHARGE_FLAG_FORCE_IDLE) + led_set_color_battery( + (battery_ticks % LED_TOTAL_4SECS_TICKS < + LED_ON_2SECS_TICKS) ? LED_AMBER : LED_BLUE); + else + led_set_color_battery(LED_BLUE); + break; + default: + /* Other states don't alter LED behavior */ + break; + } + battery_ticks++; + suspend_ticks++; +} + +/* Called by hook task every 1 sec */ +static void led_second(void) +{ + /* + * Reference board only has one LED, so overload it to act as both + * power LED and battery LED. + */ + if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED)) + led_set_battery(); +} +DECLARE_HOOK(HOOK_SECOND, led_second, HOOK_PRIO_DEFAULT); |