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/* Copyright 2016 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/Battery LED control for Kevin
*/
#include "charge_state.h"
#include "chipset.h"
#include "console.h"
#include "extpower.h"
#include "gpio.h"
#include "hooks.h"
#include "led_common.h"
#include "pwm.h"
#include "registers.h"
#include "util.h"
#define CPRINTF(format, args...) cprintf(CC_PWM, format, ## args)
#define CPRINTS(format, args...) cprints(CC_PWM, format, ## args)
#define LED_TOTAL_TICKS 16
#define LED_ON_TICKS 8
static int led_debug;
const enum ec_led_id supported_led_ids[] = {
EC_LED_ID_POWER_LED, EC_LED_ID_BATTERY_LED};
const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
enum led_color {
LED_OFF = 0,
LED_RED,
LED_GREEN,
LED_BLUE,
/* Number of colors, not a color itself */
LED_COLOR_COUNT
};
/* Brightness vs. color, in the order of off, red, green and blue */
static const uint8_t color_brightness[LED_COLOR_COUNT][3] = {
/* {Red, Blue, Green}, */
[LED_OFF] = {100, 100, 100},
[LED_RED] = {90, 100, 100},
[LED_GREEN] = {100, 100, 80},
[LED_BLUE] = {100, 80, 100},
};
/**
* Set LED color
*
* @param color Enumerated color value
*/
static void set_color(enum led_color color)
{
pwm_set_duty(PWM_CH_LED_RED, color_brightness[color][0]);
pwm_set_duty(PWM_CH_LED_BLUE, color_brightness[color][1]);
pwm_set_duty(PWM_CH_LED_GREEN, color_brightness[color][2]);
}
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_BLUE] = 100;
brightness_range[EC_LED_COLOR_GREEN] = 100;
}
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
pwm_set_duty(PWM_CH_LED_RED, brightness[EC_LED_COLOR_RED]);
pwm_set_duty(PWM_CH_LED_BLUE, brightness[EC_LED_COLOR_BLUE]);
pwm_set_duty(PWM_CH_LED_GREEN, brightness[EC_LED_COLOR_GREEN]);
return EC_SUCCESS;
}
static void kevin_led_set_power_battery(void)
{
static int power_ticks;
if (chipset_in_state(CHIPSET_STATE_ON)) {
set_color(LED_BLUE);
return;
}
/* CHIPSET_STATE_OFF */
switch (charge_get_state()) {
case PWR_STATE_DISCHARGE:
set_color(LED_OFF);
break;
case PWR_STATE_CHARGE:
set_color(LED_RED);
break;
case PWR_STATE_ERROR:
power_ticks++;
set_color(((power_ticks % LED_TOTAL_TICKS)
< LED_ON_TICKS) ? LED_RED : LED_GREEN);
break;
case PWR_STATE_CHARGE_NEAR_FULL:
case PWR_STATE_IDLE: /* External power connected in IDLE. */
set_color(LED_GREEN);
break;
default:
set_color(LED_RED);
break;
}
if ((charge_get_state()) != PWR_STATE_ERROR)
power_ticks = 0;
}
static void led_init(void)
{
/*
* Enable PWMs and set to 0% duty cycle. If they're disabled,
* seems to ground the pins instead of letting them float.
*/
pwm_enable(PWM_CH_LED_RED, 1);
pwm_enable(PWM_CH_LED_GREEN, 1);
pwm_enable(PWM_CH_LED_BLUE, 1);
set_color(LED_OFF);
}
/* After pwm_pin_init() */
DECLARE_HOOK(HOOK_INIT, led_init, HOOK_PRIO_DEFAULT);
/**
* Called by hook task every 250 ms
*/
static void led_tick(void)
{
if (led_debug)
return;
if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED) &&
led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED)) {
kevin_led_set_power_battery();
return;
}
set_color(LED_OFF);
}
DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
/******************************************************************/
/* Console commands */
static int command_led_color(int argc, char **argv)
{
if (argc > 1) {
if (!strcasecmp(argv[1], "debug")) {
led_debug ^= 1;
CPRINTF("led_debug = %d\n", led_debug);
} else if (!strcasecmp(argv[1], "off")) {
set_color(LED_OFF);
} else if (!strcasecmp(argv[1], "red")) {
set_color(LED_RED);
} else if (!strcasecmp(argv[1], "green")) {
set_color(LED_GREEN);
} else if (!strcasecmp(argv[1], "blue")) {
set_color(LED_BLUE);
} else {
/* maybe handle charger_discharge_on_ac() too? */
return EC_ERROR_PARAM1;
}
}
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(ledcolor, command_led_color,
"[debug|red|green|blue|off]",
"Change LED color",
NULL);
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