diff options
-rw-r--r-- | baseboard/brask/baseboard.h | 5 | ||||
-rw-r--r-- | board/brask/board.h | 4 | ||||
-rw-r--r-- | board/brask/build.mk | 1 | ||||
-rw-r--r-- | board/brask/led.c | 252 | ||||
-rw-r--r-- | board/brask/pwm.c | 13 |
5 files changed, 270 insertions, 5 deletions
diff --git a/baseboard/brask/baseboard.h b/baseboard/brask/baseboard.h index fc581c207c..4b9d8f386a 100644 --- a/baseboard/brask/baseboard.h +++ b/baseboard/brask/baseboard.h @@ -46,10 +46,7 @@ #define CONFIG_HOSTCMD_ESPI_RESET_SLP_SX_VW_ON_ESPI_RST /* LED */ -/* - * TODO(b/197471359): Implement the LED behavior - */ -/* #define CONFIG_LED_COMMON */ +#define CONFIG_LED_COMMON /* Common charger defines */ #define CONFIG_CHARGE_MANAGER diff --git a/board/brask/board.h b/board/brask/board.h index 21a25c3811..eea02bdf16 100644 --- a/board/brask/board.h +++ b/board/brask/board.h @@ -175,7 +175,9 @@ enum ioex_port { }; enum pwm_channel { - PWM_CH_FAN, /* PWM5 */ + PWM_CH_LED_GREEN, /* PWM0 */ + PWM_CH_FAN, /* PWM5 */ + PWM_CH_LED_RED, /* PWM2 */ PWM_CH_COUNT }; diff --git a/board/brask/build.mk b/board/brask/build.mk index 341f4e3659..442a708d78 100644 --- a/board/brask/build.mk +++ b/board/brask/build.mk @@ -14,6 +14,7 @@ BASEBOARD:=brask board-y= board-y+=board.o board-y+=i2c.o +board-y+=led.o board-y+=pwm.o board-y+=sensors.o board-y+=usbc_config.o diff --git a/board/brask/led.c b/board/brask/led.c new file mode 100644 index 0000000000..6aaa890ec8 --- /dev/null +++ b/board/brask/led.c @@ -0,0 +1,252 @@ +/* Copyright 2021 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 LED control for Brask. + * Solid green - active power + * Green flashing - suspended + * Red flashing - alert + * Solid red - critical + */ + +#include "chipset.h" +#include "console.h" +#include "ec_commands.h" +#include "gpio.h" +#include "hooks.h" +#include "led_common.h" +#include "pwm.h" +#include "timer.h" +#include "util.h" + +#define CPRINTS(format, args...) cprints(CC_GPIO, format, ## args) + +/* + * Due to the CSME-Lite processing, upon startup the CPU transitions through + * S0->S3->S5->S3->S0, causing the LED to turn on/off/on, so + * delay turning off the LED during suspend/shutdown. + */ +#define LED_CPU_DELAY_MS (2000 * MSEC) + +const enum ec_led_id supported_led_ids[] = {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_GREEN, + + /* Number of colors, not a color itself */ + LED_COLOR_COUNT +}; + +static int set_color_power(enum led_color color, int duty) +{ + int green = 0; + int red = 0; + + if (duty < 0 || 100 < duty) + return EC_ERROR_UNKNOWN; + + switch (color) { + case LED_OFF: + break; + case LED_GREEN: + green = 1; + break; + case LED_RED: + red = 1; + break; + default: + return EC_ERROR_UNKNOWN; + } + + if (red) + pwm_set_duty(PWM_CH_LED_RED, duty); + else + pwm_set_duty(PWM_CH_LED_RED, 0); + + if (green) + pwm_set_duty(PWM_CH_LED_GREEN, duty); + else + pwm_set_duty(PWM_CH_LED_GREEN, 0); + + return EC_SUCCESS; +} + +static int set_color(enum ec_led_id id, enum led_color color, int duty) +{ + switch (id) { + case EC_LED_ID_POWER_LED: + return set_color_power(color, duty); + default: + return EC_ERROR_UNKNOWN; + } +} + +#define LED_PULSE_US (2 * SECOND) +/* 40 msec for nice and smooth transition. */ +#define LED_PULSE_TICK_US (40 * MSEC) + +/* + * When pulsing is enabled, brightness is incremented by <duty_inc> every + * <interval> usec from 0 to 100% in LED_PULSE_US usec. Then it's decremented + * likewise in LED_PULSE_US usec. + */ +static struct { + uint32_t interval; + int duty_inc; + enum led_color color; + int duty; +} led_pulse; + +#define CONFIG_TICK(interval, color) \ + config_tick((interval), 100 / (LED_PULSE_US / (interval)), (color)) + +static void config_tick(uint32_t interval, int duty_inc, enum led_color color) +{ + led_pulse.interval = interval; + led_pulse.duty_inc = duty_inc; + led_pulse.color = color; + led_pulse.duty = 0; +} + +static void pulse_power_led(enum led_color color) +{ + set_color(EC_LED_ID_POWER_LED, color, led_pulse.duty); + if (led_pulse.duty + led_pulse.duty_inc > 100) + led_pulse.duty_inc = led_pulse.duty_inc * -1; + else if (led_pulse.duty + led_pulse.duty_inc < 0) + led_pulse.duty_inc = led_pulse.duty_inc * -1; + led_pulse.duty += led_pulse.duty_inc; +} + +static void led_tick(void); +DECLARE_DEFERRED(led_tick); +static void led_tick(void) +{ + uint32_t elapsed; + uint32_t next = 0; + uint32_t start = get_time().le.lo; + + if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED)) + pulse_power_led(led_pulse.color); + elapsed = get_time().le.lo - start; + next = led_pulse.interval > elapsed ? led_pulse.interval - elapsed : 0; + hook_call_deferred(&led_tick_data, next); +} + +static void led_suspend(void) +{ + CONFIG_TICK(LED_PULSE_TICK_US, LED_GREEN); + led_tick(); +} +DECLARE_DEFERRED(led_suspend); + +static void led_shutdown(void) +{ + if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED)) + set_color(EC_LED_ID_POWER_LED, LED_OFF, 0); +} +DECLARE_DEFERRED(led_shutdown); + +static void led_shutdown_hook(void) +{ + hook_call_deferred(&led_tick_data, -1); + hook_call_deferred(&led_suspend_data, -1); + hook_call_deferred(&led_shutdown_data, LED_CPU_DELAY_MS); +} +DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, led_shutdown_hook, HOOK_PRIO_DEFAULT); + +static void led_suspend_hook(void) +{ + hook_call_deferred(&led_shutdown_data, -1); + hook_call_deferred(&led_suspend_data, LED_CPU_DELAY_MS); +} +DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, led_suspend_hook, HOOK_PRIO_DEFAULT); + +static void led_resume(void) +{ + /* + * Assume there is no race condition with led_tick, which also + * runs in hook_task. + */ + hook_call_deferred(&led_tick_data, -1); + /* + * Avoid invoking the suspend/shutdown delayed hooks. + */ + hook_call_deferred(&led_suspend_data, -1); + hook_call_deferred(&led_shutdown_data, -1); + if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED)) + set_color(EC_LED_ID_POWER_LED, LED_GREEN, 100); +} +DECLARE_HOOK(HOOK_CHIPSET_RESUME, led_resume, HOOK_PRIO_DEFAULT); + +void led_alert(int enable) +{ + if (enable) { + /* Overwrite the current signal */ + config_tick(1 * SECOND, 100, LED_RED); + led_tick(); + } else { + /* Restore the previous signal */ + if (chipset_in_state(CHIPSET_STATE_ON)) + led_resume(); + else if (chipset_in_state(CHIPSET_STATE_SUSPEND)) + led_suspend_hook(); + else if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) + led_shutdown_hook(); + } +} + +void show_critical_error(void) +{ + hook_call_deferred(&led_tick_data, -1); + if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED)) + set_color(EC_LED_ID_POWER_LED, LED_RED, 100); +} + +static int command_led(int argc, char **argv) +{ + enum ec_led_id id = EC_LED_ID_POWER_LED; + + if (argc < 2) + return EC_ERROR_PARAM_COUNT; + + if (!strcasecmp(argv[1], "debug")) { + led_auto_control(id, !led_auto_control_is_enabled(id)); + ccprintf("o%s\n", led_auto_control_is_enabled(id) ? "ff" : "n"); + } else if (!strcasecmp(argv[1], "off")) { + set_color(id, LED_OFF, 0); + } else if (!strcasecmp(argv[1], "red")) { + set_color(id, LED_RED, 100); + } else if (!strcasecmp(argv[1], "green")) { + set_color(id, LED_GREEN, 100); + } else if (!strcasecmp(argv[1], "alert")) { + led_alert(1); + } else if (!strcasecmp(argv[1], "crit")) { + show_critical_error(); + } else { + return EC_ERROR_PARAM1; + } + return EC_SUCCESS; +} +DECLARE_CONSOLE_COMMAND(led, command_led, + "[debug|red|green|off|alert|crit]", + "Turn on/off LED."); + +void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range) +{ + brightness_range[EC_LED_COLOR_RED] = 100; + brightness_range[EC_LED_COLOR_GREEN] = 100; +} + +int led_set_brightness(enum ec_led_id id, const uint8_t *brightness) +{ + if (brightness[EC_LED_COLOR_RED]) + return set_color(id, LED_RED, brightness[EC_LED_COLOR_RED]); + else if (brightness[EC_LED_COLOR_GREEN]) + return set_color(id, LED_GREEN, brightness[EC_LED_COLOR_GREEN]); + else + return set_color(id, LED_OFF, 0); +} diff --git a/board/brask/pwm.c b/board/brask/pwm.c index aab092d407..5ad905f861 100644 --- a/board/brask/pwm.c +++ b/board/brask/pwm.c @@ -11,11 +11,21 @@ #include "pwm_chip.h" const struct pwm_t pwm_channels[] = { + [PWM_CH_LED_GREEN] = { + .channel = 0, + .flags = PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP, + .freq = 2000 + }, [PWM_CH_FAN] = { .channel = 5, .flags = PWM_CONFIG_OPEN_DRAIN | PWM_CONFIG_DSLEEP, .freq = 1000 }, + [PWM_CH_LED_RED] = { + .channel = 2, + .flags = PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP, + .freq = 2000 + }, }; BUILD_ASSERT(ARRAY_SIZE(pwm_channels) == PWM_CH_COUNT); @@ -28,5 +38,8 @@ static void board_pwm_init(void) */ pwm_enable(PWM_CH_FAN, 1); pwm_set_duty(PWM_CH_FAN, 100); + + pwm_enable(PWM_CH_LED_RED, 1); + pwm_enable(PWM_CH_LED_GREEN, 1); } DECLARE_HOOK(HOOK_INIT, board_pwm_init, HOOK_PRIO_DEFAULT); |