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/* 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 and battery LED control for Redrix
*/
#include <stdint.h>
#include "battery.h"
#include "charge_manager.h"
#include "charge_state.h"
#include "chipset.h"
#include "ec_commands.h"
#include "gpio.h"
#include "host_command.h"
#include "led_common.h"
#include "task.h"
#define BAT_LED_ON 0
#define BAT_LED_OFF 1
#define POWER_LED_ON 0
#define POWER_LED_OFF 1
#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_LEFT_LED,
EC_LED_ID_RIGHT_LED,
EC_LED_ID_POWER_LED
};
const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
enum led_color {
LED_OFF = 0,
LED_AMBER,
LED_WHITE,
LED_COLOR_COUNT /* Number of colors, not a color itself */
};
enum led_port {
LEFT_PORT = 0,
RIGHT_PORT
};
static void led_set_color_battery(int port, enum led_color color)
{
enum gpio_signal amber_led, white_led;
amber_led = (port == RIGHT_PORT ? GPIO_C1_CHARGE_LED_AMBER_L :
GPIO_C0_CHARGE_LED_AMBER_L);
white_led = (port == RIGHT_PORT ? GPIO_C1_CHARGE_LED_WHITE_L :
GPIO_C0_CHARGE_LED_WHITE_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_set_color_power(enum ec_led_colors color)
{
switch (color) {
case LED_OFF:
gpio_set_level(GPIO_PWR_LED_WHITE_L, POWER_LED_OFF);
break;
case LED_WHITE:
gpio_set_level(GPIO_PWR_LED_WHITE_L, POWER_LED_ON);
break;
default:
break;
}
}
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
switch (led_id) {
case EC_LED_ID_LEFT_LED:
brightness_range[EC_LED_COLOR_WHITE] = 1;
brightness_range[EC_LED_COLOR_AMBER] = 1;
break;
case EC_LED_ID_RIGHT_LED:
brightness_range[EC_LED_COLOR_WHITE] = 1;
brightness_range[EC_LED_COLOR_AMBER] = 1;
break;
case EC_LED_ID_POWER_LED:
brightness_range[EC_LED_COLOR_WHITE] = 1;
break;
default:
break;
}
}
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
switch (led_id) {
case EC_LED_ID_LEFT_LED:
if (brightness[EC_LED_COLOR_WHITE] != 0)
led_set_color_battery(LEFT_PORT, LED_WHITE);
else if (brightness[EC_LED_COLOR_AMBER] != 0)
led_set_color_battery(LEFT_PORT, LED_AMBER);
else
led_set_color_battery(LEFT_PORT, LED_OFF);
break;
case EC_LED_ID_RIGHT_LED:
if (brightness[EC_LED_COLOR_WHITE] != 0)
led_set_color_battery(RIGHT_PORT, LED_WHITE);
else if (brightness[EC_LED_COLOR_AMBER] != 0)
led_set_color_battery(RIGHT_PORT, LED_AMBER);
else
led_set_color_battery(RIGHT_PORT, LED_OFF);
break;
case EC_LED_ID_POWER_LED:
if (brightness[EC_LED_COLOR_WHITE] != 0)
led_set_color_power(LED_WHITE);
else
led_set_color_power(LED_OFF);
break;
default:
return EC_ERROR_PARAM1;
}
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)
{
int port = charge_manager_get_active_charge_port();
if (led_auto_control_is_enabled(EC_LED_ID_RIGHT_LED))
led_set_color_battery(RIGHT_PORT,
(port == RIGHT_PORT) ? color : LED_OFF);
if (led_auto_control_is_enabled(EC_LED_ID_LEFT_LED))
led_set_color_battery(LEFT_PORT,
(port == LEFT_PORT) ? color : LED_OFF);
}
static void led_set_battery(void)
{
static unsigned int battery_ticks;
uint32_t chflags = charge_get_flags();
battery_ticks++;
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:
if (led_auto_control_is_enabled(EC_LED_ID_RIGHT_LED)) {
if (charge_get_percent() < 10)
led_set_color_battery(RIGHT_PORT,
(battery_ticks % LED_TICKS_PER_CYCLE
< LED_ON_TICKS) ? LED_WHITE : LED_OFF);
else
led_set_color_battery(RIGHT_PORT, LED_OFF);
}
if (led_auto_control_is_enabled(EC_LED_ID_LEFT_LED))
led_set_color_battery(LEFT_PORT, LED_OFF);
break;
case PWR_STATE_ERROR:
set_active_port_color((battery_ticks & 0x1) ?
LED_WHITE : 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 */
if (chflags & CHARGE_FLAG_FORCE_IDLE)
set_active_port_color((battery_ticks %
LED_TICKS_PER_CYCLE < LED_ON_TICKS) ?
LED_AMBER : LED_OFF);
else
set_active_port_color(LED_WHITE);
break;
default:
/* Other states don't alter LED behavior */
break;
}
}
static void led_set_power(void)
{
static unsigned int power_tick;
power_tick++;
if (chipset_in_state(CHIPSET_STATE_ON))
led_set_color_power(LED_WHITE);
else if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND))
led_set_color_power((power_tick %
LED_TICKS_PER_CYCLE < LED_ON_TICKS) ?
LED_WHITE : LED_OFF);
else
led_set_color_power(LED_OFF);
}
void led_task(void *u)
{
uint32_t start_time;
uint32_t task_duration;
while (1) {
start_time = get_time().le.lo;
if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED))
led_set_power();
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);
}
}
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