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/* Copyright 2022 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#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 "hooks.h"
#define BAT_LED_ON 0
#define BAT_LED_OFF 1
#define BATT_LOW_BCT 10
#define LED_TICKS_PER_CYCLE 4
#define LED_TICKS_PER_CYCLE_S3 4
#define LED_ON_TICKS 2
#define POWER_LED_ON_S3_TICKS 2
const enum ec_led_id supported_led_ids[] = { EC_LED_ID_LEFT_LED,
EC_LED_ID_RIGHT_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)
{
const struct gpio_dt_spec *amber_led, *white_led;
if (port == LEFT_PORT) {
amber_led = GPIO_DT_FROM_NODELABEL(gpio_c0_charger_led_amber_l);
white_led = GPIO_DT_FROM_NODELABEL(gpio_c0_charger_led_white_l);
} else if (port == RIGHT_PORT) {
amber_led = GPIO_DT_FROM_NODELABEL(gpio_c1_charger_led_amber_l);
white_led = GPIO_DT_FROM_NODELABEL(gpio_c1_charger_led_white_l);
}
switch (color) {
case LED_WHITE:
gpio_pin_set_dt(white_led, BAT_LED_ON);
gpio_pin_set_dt(amber_led, BAT_LED_OFF);
break;
case LED_AMBER:
gpio_pin_set_dt(white_led, BAT_LED_OFF);
gpio_pin_set_dt(amber_led, BAT_LED_ON);
break;
case LED_OFF:
gpio_pin_set_dt(white_led, BAT_LED_OFF);
gpio_pin_set_dt(amber_led, BAT_LED_OFF);
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;
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;
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;
static int suspend_ticks;
battery_ticks++;
/*
* Override battery LEDs for Yaviks, Yaviks is non-power LED
* design, blinking both two side battery white LEDs to indicate
* system suspend with non-charging state.
*/
if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND) &&
charge_get_state() != PWR_STATE_CHARGE) {
suspend_ticks++;
led_set_color_battery(RIGHT_PORT,
suspend_ticks % LED_TICKS_PER_CYCLE_S3 <
POWER_LED_ON_S3_TICKS ?
LED_WHITE :
LED_OFF);
led_set_color_battery(LEFT_PORT,
suspend_ticks % LED_TICKS_PER_CYCLE_S3 <
POWER_LED_ON_S3_TICKS ?
LED_WHITE :
LED_OFF);
return;
}
suspend_ticks = 0;
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_RIGHT_LED)) {
if (charge_get_percent() < BATT_LOW_BCT)
led_set_color_battery(
RIGHT_PORT,
(battery_ticks % LED_TICKS_PER_CYCLE <
LED_ON_TICKS) ?
LED_AMBER :
LED_OFF);
else
led_set_color_battery(RIGHT_PORT, LED_OFF);
}
if (led_auto_control_is_enabled(EC_LED_ID_LEFT_LED)) {
if (charge_get_percent() < BATT_LOW_BCT)
led_set_color_battery(
LEFT_PORT,
(battery_ticks % LED_TICKS_PER_CYCLE <
LED_ON_TICKS) ?
LED_AMBER :
LED_OFF);
else
led_set_color_battery(LEFT_PORT, LED_OFF);
}
break;
case PWR_STATE_ERROR:
if (led_auto_control_is_enabled(EC_LED_ID_RIGHT_LED)) {
led_set_color_battery(
RIGHT_PORT,
(battery_ticks & 0x1) ? LED_AMBER : LED_OFF);
}
if (led_auto_control_is_enabled(EC_LED_ID_LEFT_LED)) {
led_set_color_battery(LEFT_PORT, (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;
}
}
/* Called by hook task every TICK(IT83xx 500ms) */
static void led_tick(void)
{
led_set_battery();
}
DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
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