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author | Alexandru M Stan <amstan@chromium.org> | 2015-01-12 13:28:32 -0800 |
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committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2015-01-14 21:49:36 +0000 |
commit | 35b13dc19a258ce4c751c9e50364ff3ccfc58eff (patch) | |
tree | 1c188057461e3f2ac236df2d5aaa63efcc75a453 /common/led_policy_std.c | |
parent | b34b4beef9b2383817512284f133b21eb5e8c72f (diff) | |
download | chrome-ec-35b13dc19a258ce4c751c9e50364ff3ccfc58eff.tar.gz |
Standard Power/Charging LED Behavior
Assuming the dut has red/green battery led and a single power led
CONFIG_LED_POLICY_STD implements the chromeos spec:
* power led on in S0
* power led off in S5
* power led pulsing in S3
* battery led amber when charging
* battery led green when fully charged with AC
* battery led off when discharging
* battery led pulsing red when battery error
BUG=chrome-os-partner:35355
TEST=The Charging led behavior should match the cros spec
BRANCH=None
Change-Id: I645a939ecc2d44d73d2f52b295f9c7e8c923f77b
Signed-off-by: Alexandru M Stan <amstan@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/240705
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Diffstat (limited to 'common/led_policy_std.c')
-rw-r--r-- | common/led_policy_std.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/common/led_policy_std.c b/common/led_policy_std.c new file mode 100644 index 0000000000..2fd159ec49 --- /dev/null +++ b/common/led_policy_std.c @@ -0,0 +1,185 @@ +/* Copyright (c) 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. + * + * Standard Battery LED and Power LED control + * This assumes a red/green battery led and a single power led. + */ + +#include "gpio.h" +#include "hooks.h" +#include "battery.h" +#include "charge_state.h" +#include "chipset.h" +#include "led_common.h" +#include "util.h" +#include "lid_switch.h" + +#ifdef CONFIG_LED_BAT_ACTIVE_LOW +#define BAT_LED_ON 0 +#define BAT_LED_OFF 1 +#else +#define BAT_LED_ON 1 +#define BAT_LED_OFF 0 +#endif + +#ifdef CONFIG_LED_POWER_ACTIVE_LOW +#define POWER_LED_ON 0 +#define POWER_LED_OFF 1 +#else +#define POWER_LED_ON 1 +#define POWER_LED_OFF 0 +#endif + +const enum ec_led_id supported_led_ids[] = { + EC_LED_ID_BATTERY_LED, EC_LED_ID_POWER_LED}; + +const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids); + +enum led_color { + LED_OFF = 0, + LED_RED, + LED_AMBER, + LED_GREEN, + 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_GREEN, BAT_LED_OFF); + gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_OFF); + break; + case LED_RED: + gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_OFF); + gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_ON); + break; + case LED_AMBER: + gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_ON); + gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_ON); + break; + case LED_GREEN: + gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_ON); + gpio_set_level(GPIO_BAT_LED_RED, BAT_LED_OFF); + break; + default: + return EC_ERROR_UNKNOWN; + } + return EC_SUCCESS; +} + +static int pwr_led_set_color(enum led_color color) +{ + switch (color) { + case LED_OFF: + gpio_set_level(GPIO_POWER_LED, POWER_LED_OFF); + break; + case LED_WHITE: + gpio_set_level(GPIO_POWER_LED, + lid_is_open() ? POWER_LED_ON : POWER_LED_OFF); + break; + default: + return EC_ERROR_UNKNOWN; + } + 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; +} + +int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness) +{ + switch (led_id) { + case EC_LED_ID_BATTERY_LED: + gpio_set_level(GPIO_BAT_LED_RED, + (brightness[EC_LED_COLOR_RED] != 0) ? + BAT_LED_ON : BAT_LED_OFF); + gpio_set_level(GPIO_BAT_LED_GREEN, + (brightness[EC_LED_COLOR_GREEN] != 0) ? + BAT_LED_ON : BAT_LED_OFF); + break; + case EC_LED_ID_POWER_LED: + gpio_set_level(GPIO_POWER_LED, + (brightness[EC_LED_COLOR_WHITE] != 0) ? + POWER_LED_ON : POWER_LED_OFF); + break; + default: + return EC_ERROR_UNKNOWN; + } + return EC_SUCCESS; +} + +static void std_led_set_power(void) +{ + static int power_second; + + power_second++; + + if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) + pwr_led_set_color(LED_OFF); + else if (chipset_in_state(CHIPSET_STATE_ON)) + pwr_led_set_color(LED_WHITE); + else if (chipset_in_state(CHIPSET_STATE_SUSPEND)) + pwr_led_set_color((power_second & 3) ? LED_OFF : LED_WHITE); +} + +static void std_led_set_battery(void) +{ + static int battery_second; + uint32_t chflags = charge_get_flags(); + + battery_second++; + + /* BAT LED behavior: + * Same as the chromeos spec + * Green/Amber for CHARGE_FLAG_FORCE_IDLE + */ + switch (charge_get_state()) { + case PWR_STATE_CHARGE: + bat_led_set_color(LED_AMBER); + break; + case PWR_STATE_DISCHARGE: + if (charge_get_percent() < 3) + bat_led_set_color((battery_second & 1) + ? LED_OFF : LED_AMBER); + else if (charge_get_percent() < 10) + bat_led_set_color((battery_second & 3) + ? LED_OFF : LED_AMBER); + else + bat_led_set_color(LED_OFF); + break; + case PWR_STATE_ERROR: + bat_led_set_color((battery_second & 1) ? LED_OFF : LED_RED); + break; + case PWR_STATE_CHARGE_NEAR_FULL: + bat_led_set_color(LED_GREEN); + break; + case PWR_STATE_IDLE: /* External power connected in IDLE. */ + if (chflags & CHARGE_FLAG_FORCE_IDLE) + bat_led_set_color( + (battery_second & 0x2) ? LED_GREEN : LED_AMBER); + else + bat_led_set_color(LED_GREEN); + break; + default: + /* Other states don't alter LED behavior */ + break; + } +} + +/** * Called by hook task every 1 sec */ +static void led_second(void) +{ + if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED)) + std_led_set_power(); + if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED)) + std_led_set_battery(); +} +DECLARE_HOOK(HOOK_SECOND, led_second, HOOK_PRIO_DEFAULT); + |