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/* Copyright 2015 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 Reks
*/
#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 BAT_LED_ON 0
#define BAT_LED_OFF 1
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_AMBER,
LED_GREEN,
/* Number of colors, not a color itself */
LED_COLOR_COUNT
};
static int bat_led_set_color(enum led_color color)
{
switch (color) {
case LED_OFF:
gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_OFF);
gpio_set_level(GPIO_BAT_LED_AMBER, BAT_LED_OFF);
break;
case LED_AMBER:
gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_OFF);
gpio_set_level(GPIO_BAT_LED_AMBER, BAT_LED_ON);
break;
case LED_GREEN:
gpio_set_level(GPIO_BAT_LED_GREEN, BAT_LED_ON);
gpio_set_level(GPIO_BAT_LED_AMBER, BAT_LED_OFF);
break;
default:
return EC_ERROR_UNKNOWN;
}
return EC_SUCCESS;
}
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
brightness_range[EC_LED_COLOR_RED] = 1;
brightness_range[EC_LED_COLOR_GREEN] = 1;
}
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
switch (led_id) {
case EC_LED_ID_BATTERY_LED:
if (brightness[EC_LED_COLOR_GREEN] != 0)
bat_led_set_color(LED_GREEN);
else if (brightness[EC_LED_COLOR_YELLOW] != 0)
bat_led_set_color(LED_AMBER);
else
bat_led_set_color(LED_OFF);
break;
default:
break;
}
return EC_SUCCESS;
}
/**
* Called by hook task every 250 ms
*/
static void led_tick(void)
{
static unsigned ticks;
int chstate = charge_get_state();
ticks++;
if (led_debug)
return;
/* If we don't control the LED, nothing to do */
if (!led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
return;
/* If charging error, blink orange, 25% duty cycle, 4 sec period */
if (chstate == PWR_STATE_ERROR) {
bat_led_set_color((ticks % 16) < 4 ? LED_AMBER : LED_OFF);
return;
}
/* If charge-force-idle, blink green, 50% duty cycle, 2 sec period */
if (chstate == PWR_STATE_IDLE &&
(charge_get_flags() & CHARGE_FLAG_FORCE_IDLE)) {
bat_led_set_color((ticks & 0x4) ? LED_GREEN : LED_OFF);
return;
}
/* If the system is charging, solid orange */
if (chstate == PWR_STATE_CHARGE) {
bat_led_set_color(LED_AMBER);
return;
}
/* If AC connected and fully charged (or close to it), solid green */
if (chstate == PWR_STATE_CHARGE_NEAR_FULL ||
chstate == PWR_STATE_IDLE) {
bat_led_set_color(LED_GREEN);
return;
}
/* Otherwise, system is off and AC not connected, LED off */
bat_led_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")) {
bat_led_set_color(LED_OFF);
} else if (!strcasecmp(argv[1], "green")) {
bat_led_set_color(LED_GREEN);
} else if (!strcasecmp(argv[1], "amber")) {
bat_led_set_color(LED_AMBER);
} else {
/* maybe handle charger_discharge_on_ac() too? */
return EC_ERROR_PARAM1;
}
}
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(ledcolor, command_led_color,
"[debug|green|amber|off]",
"Change LED color",
NULL);
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