diff options
Diffstat (limited to 'board/agah/led.c')
| -rw-r--r-- | board/agah/led.c | 221 |
1 files changed, 165 insertions, 56 deletions
diff --git a/board/agah/led.c b/board/agah/led.c index 12a7c3e09f..e16b3df5d6 100644 --- a/board/agah/led.c +++ b/board/agah/led.c @@ -1,83 +1,192 @@ -/* Copyright 2021 The Chromium OS Authors. All rights reserved. +/* Copyright 2021 The ChromiumOS Authors * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. - */ - -/* Agah specific PWM LED settings: there are 2 LEDs on each side of the board, - * each one can be controlled separately. The LED colors are white or amber, - * and the default behavior is tied to the charging process: both sides are - * amber while charging the battery and white when the battery is charged. + * + * Battery LED control for Agah */ #include <stdint.h> -#include "common.h" -#include "compile_time_macros.h" +#include "battery.h" +#include "charge_manager.h" +#include "charge_state.h" +#include "chipset.h" #include "ec_commands.h" -#include "led_pwm.h" -#include "pwm.h" -#include "util.h" +#include "gpio.h" +#include "host_command.h" +#include "led_common.h" +#include "task.h" -const enum ec_led_id supported_led_ids[] = { - EC_LED_ID_LEFT_LED, - EC_LED_ID_RIGHT_LED, -}; +#define BAT_LED_ON 0 +#define BAT_LED_OFF 1 + +#define BATT_LOW_BCT 10 + +#define LED_TICK_INTERVAL_MS (500 * MSEC) +#define LED_CYCLE_TIME_MS (2000 * MSEC) +#define LED_TICKS_PER_CYCLE (LED_CYCLE_TIME_MS / LED_TICK_INTERVAL_MS) +#define LED_ON_TIME_MS (1000 * MSEC) +#define LED_ON_TICKS (LED_ON_TIME_MS / LED_TICK_INTERVAL_MS) + +const enum ec_led_id supported_led_ids[] = { EC_LED_ID_BATTERY_LED }; const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids); -/* - * We only have a white and an amber LED, so setting any other color results in - * both LEDs being off. Cap at 50% to save power. - */ -struct pwm_led_color_map led_color_map[EC_LED_COLOR_COUNT] = { - /* Amber, White */ - [EC_LED_COLOR_RED] = { 0, 0 }, - [EC_LED_COLOR_GREEN] = { 0, 0 }, - [EC_LED_COLOR_BLUE] = { 0, 0 }, - [EC_LED_COLOR_YELLOW] = { 0, 0 }, - [EC_LED_COLOR_WHITE] = { 0, 50 }, - [EC_LED_COLOR_AMBER] = { 50, 0 }, +enum led_color { + LED_OFF = 0, + LED_AMBER, + LED_WHITE, + LED_COLOR_COUNT /* Number of colors, not a color itself */ }; -/* Two logical LEDs with amber and white channels. */ -struct pwm_led pwm_leds[CONFIG_LED_PWM_COUNT] = { - { - .ch0 = PWM_CH_LED1, - .ch1 = PWM_CH_LED2, - .ch2 = PWM_LED_NO_CHANNEL, - .enable = &pwm_enable, - .set_duty = &pwm_set_duty, - }, -}; +static void led_set_color_battery(enum led_color color) +{ + enum gpio_signal amber_led, white_led; + + amber_led = GPIO_LED_1_L; + white_led = GPIO_LED_2_L; + + switch (color) { + case LED_WHITE: + gpio_set_level(white_led, BAT_LED_ON); + gpio_set_level(amber_led, BAT_LED_OFF); + break; + case LED_AMBER: + gpio_set_level(white_led, BAT_LED_OFF); + gpio_set_level(amber_led, BAT_LED_ON); + break; + case LED_OFF: + gpio_set_level(white_led, BAT_LED_OFF); + gpio_set_level(amber_led, BAT_LED_OFF); + break; + default: + break; + } +} void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range) { - memset(brightness_range, '\0', - sizeof(*brightness_range) * EC_LED_COLOR_COUNT); - brightness_range[EC_LED_COLOR_AMBER] = 100; - brightness_range[EC_LED_COLOR_WHITE] = 100; + switch (led_id) { + case EC_LED_ID_BATTERY_LED: + brightness_range[EC_LED_COLOR_WHITE] = 1; + brightness_range[EC_LED_COLOR_AMBER] = 1; + break; + default: + break; + } } int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness) { - enum pwm_led_id pwm_id; - - /* Convert ec_led_id to pwm_led_id. */ switch (led_id) { - case EC_LED_ID_LEFT_LED: - pwm_id = PWM_LED0; + case EC_LED_ID_BATTERY_LED: + if (brightness[EC_LED_COLOR_WHITE] != 0) + led_set_color_battery(LED_WHITE); + else if (brightness[EC_LED_COLOR_AMBER] != 0) + led_set_color_battery(LED_AMBER); + else + led_set_color_battery(LED_OFF); break; default: - return EC_ERROR_UNKNOWN; + return EC_ERROR_PARAM1; } - if (brightness[EC_LED_COLOR_WHITE]) - set_pwm_led_color(pwm_id, EC_LED_COLOR_WHITE); - else if (brightness[EC_LED_COLOR_AMBER]) - set_pwm_led_color(pwm_id, EC_LED_COLOR_AMBER); - else - /* Otherwise, the "color" is "off". */ - set_pwm_led_color(pwm_id, -1); - return EC_SUCCESS; } + +/* + * Set active charge port color to the parameter, turn off all others. + * If no port is active (-1), turn off all LEDs. + */ +static void set_active_port_color(enum led_color color) +{ + if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED)) + led_set_color_battery(color); +} + +static void led_set_battery(void) +{ + static unsigned int battery_ticks; + static unsigned int suspend_ticks; + + battery_ticks++; + + if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND) && + charge_get_state() != PWR_STATE_CHARGE) { + suspend_ticks++; + + led_set_color_battery( + (suspend_ticks % LED_TICKS_PER_CYCLE < LED_ON_TICKS) ? + LED_WHITE : + LED_OFF); + + return; + } + + switch (charge_get_state()) { + case PWR_STATE_CHARGE: + /* Always indicate when charging, even in suspend. */ + set_active_port_color(LED_AMBER); + break; + case PWR_STATE_DISCHARGE: + /* + * Blinking amber LEDs slowly if battery is lower 10 + * percentage. + */ + if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED)) { + if (charge_get_percent() < BATT_LOW_BCT) + led_set_color_battery( + (battery_ticks % LED_TICKS_PER_CYCLE < + LED_ON_TICKS) ? + LED_AMBER : + LED_OFF); + else + led_set_color_battery(LED_OFF); + } + + break; + case PWR_STATE_ERROR: + if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED)) { + led_set_color_battery( + (battery_ticks & 0x1) ? LED_AMBER : LED_OFF); + } + + break; + case PWR_STATE_CHARGE_NEAR_FULL: + set_active_port_color(LED_WHITE); + break; + case PWR_STATE_IDLE: /* External power connected in IDLE */ + set_active_port_color(LED_WHITE); + break; + case PWR_STATE_FORCED_IDLE: + set_active_port_color( + (battery_ticks % LED_TICKS_PER_CYCLE < LED_ON_TICKS) ? + LED_AMBER : + LED_OFF); + break; + default: + /* Other states don't alter LED behavior */ + break; + } +} + +void led_task(void *u) +{ + uint32_t start_time; + uint32_t task_duration; + + while (1) { + start_time = get_time().le.lo; + + led_set_battery(); + + /* Compute time for this iteration */ + task_duration = get_time().le.lo - start_time; + /* + * Compute wait time required to for next desired LED tick. If + * the duration exceeds the tick time, then don't sleep. + */ + if (task_duration < LED_TICK_INTERVAL_MS) + usleep(LED_TICK_INTERVAL_MS - task_duration); + } +} |