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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.
*/
/* Power LED control for Shotzo.
* Solid white - active power
* 25% duty cycle white, 1s on and 3s off- suspend
* Blinking quicky white, 0.5s on and 0.5s off - alert
* 2 long 2 short white, long for 1s, short for 0.5s and interval
* is 0.5s - critical
* Off - shut down
*/
#include "chipset.h"
#include "console.h"
#include "gpio.h"
#include "hooks.h"
#include "led_common.h"
#include "timer.h"
#include "util.h"
/*
* Due to the CSME-Lite processing, upon startup the CPU transitions through
* S0->S3->S5->S3->S0, causing the LED to turn on/off/on, so
* delay turning off the LED during suspend/shutdown.
*/
#define LED_CPU_DELAY_MS (2000 * MSEC)
#define POWER_LED_ON 0
#define POWER_LED_OFF 1
const enum ec_led_id supported_led_ids[] = { EC_LED_ID_POWER_LED };
const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
enum led_color {
LED_OFF = 0,
LED_WHITE,
LED_COLOR_COUNT /* Number of colors, not a color itself */
};
static int led_set_color_power(enum led_color 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:
return EC_ERROR_UNKNOWN;
}
return EC_SUCCESS;
}
static int led_set_color(enum ec_led_id led_id, enum led_color color)
{
int rv;
switch (led_id) {
case EC_LED_ID_POWER_LED:
rv = led_set_color_power(color);
break;
default:
return EC_ERROR_UNKNOWN;
}
return rv;
}
/* When blinking is enabled, led will blinking according to led_blinking_array.
* 1 means led on, 0 means led off, restart from head after reaching the tail.
* The interval is LED_BLINKING_MS.
*/
#define LED_BLINKING_MS (500 * MSEC)
static int *led_blinking_array;
static int led_blinking_count;
static int led_blinking_index;
static void led_blinking(void);
DECLARE_DEFERRED(led_blinking);
static void led_blinking(void)
{
uint32_t elapsed;
uint32_t next = 0;
uint32_t start = get_time().le.lo;
int signal;
if (led_blinking_array == NULL)
return;
if (led_blinking_index > (led_blinking_count - 1))
led_blinking_index = 0;
signal = *(led_blinking_array + led_blinking_index);
if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED)) {
switch (signal) {
case 0:
led_set_color(EC_LED_ID_POWER_LED, LED_OFF);
led_blinking_index += 1;
break;
case 1:
led_set_color(EC_LED_ID_POWER_LED, LED_WHITE);
led_blinking_index += 1;
break;
default:
led_blinking_index = 0;
}
}
elapsed = get_time().le.lo - start;
next = elapsed < LED_BLINKING_MS ? LED_BLINKING_MS - elapsed : 0;
hook_call_deferred(&led_blinking_data, next);
}
static int led_suspend_array[] = { 1, 1, 0, 0, 0, 0, 0, 0 };
const int led_suspend_count = ARRAY_SIZE(led_suspend_array);
static void led_suspend(void)
{
led_blinking_array = led_suspend_array;
led_blinking_count = led_suspend_count;
led_blinking_index = 0;
led_blinking();
}
DECLARE_DEFERRED(led_suspend);
static void led_shutdown(void)
{
if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED))
led_set_color(EC_LED_ID_POWER_LED, LED_OFF);
}
DECLARE_DEFERRED(led_shutdown);
static void led_suspend_hook(void)
{
hook_call_deferred(&led_blinking_data, -1);
hook_call_deferred(&led_shutdown_data, -1);
hook_call_deferred(&led_suspend_data, LED_CPU_DELAY_MS);
}
DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, led_suspend_hook, HOOK_PRIO_DEFAULT);
static void led_shutdown_hook(void)
{
hook_call_deferred(&led_blinking_data, -1);
hook_call_deferred(&led_suspend_data, -1);
hook_call_deferred(&led_shutdown_data, LED_CPU_DELAY_MS);
}
DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, led_shutdown_hook, HOOK_PRIO_DEFAULT);
static void led_resume_hook(void)
{
hook_call_deferred(&led_blinking_data, -1);
hook_call_deferred(&led_suspend_data, -1);
hook_call_deferred(&led_shutdown_data, -1);
if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED))
led_set_color(EC_LED_ID_POWER_LED, LED_WHITE);
}
DECLARE_HOOK(HOOK_CHIPSET_RESUME, led_resume_hook, HOOK_PRIO_DEFAULT);
static int led_alert_array[] = { 1, 0 };
const int led_alert_count = ARRAY_SIZE(led_alert_array);
void led_alert(int enable)
{
if (enable) {
/* Overwrite the current signal */
hook_call_deferred(&led_blinking_data, -1);
led_blinking_array = led_alert_array;
led_blinking_count = led_alert_count;
led_blinking_index = 0;
led_blinking();
} else {
/* Restore the previous signal */
if (chipset_in_state(CHIPSET_STATE_ON))
led_resume_hook();
else if (chipset_in_state(CHIPSET_STATE_SUSPEND))
led_suspend_hook();
else if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
led_shutdown_hook();
}
}
static int led_critical_array[] = { 1, 1, 0, 1, 1, 0, 1, 0, 1, 0 };
const int led_critical_count = ARRAY_SIZE(led_critical_array);
void show_critical_error(void)
{
hook_call_deferred(&led_blinking_data, -1);
led_blinking_array = led_critical_array;
led_blinking_count = led_critical_count;
led_blinking_index = 0;
led_blinking();
}
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
switch (led_id) {
case EC_LED_ID_POWER_LED:
brightness_range[EC_LED_COLOR_WHITE] = 1;
break;
default:
break;
}
}
int led_set_brightness(enum ec_led_id id, const uint8_t *brightness)
{
if (brightness[EC_LED_COLOR_WHITE] != 0)
led_set_color(id, LED_WHITE);
else
led_set_color(id, LED_OFF);
return EC_SUCCESS;
}
static int command_led(int argc, const char **argv)
{
enum ec_led_id id = EC_LED_ID_POWER_LED;
if (argc < 2)
return EC_ERROR_PARAM_COUNT;
if (!strcasecmp(argv[1], "debug")) {
led_auto_control(id, !led_auto_control_is_enabled(id));
ccprintf("o%s\n", led_auto_control_is_enabled(id) ? "ff" : "n");
} else if (!strcasecmp(argv[1], "off")) {
led_set_color(id, LED_OFF);
} else if (!strcasecmp(argv[1], "white")) {
led_set_color(id, LED_WHITE);
} else if (!strcasecmp(argv[1], "alert")) {
led_alert(1);
} else if (!strcasecmp(argv[1], "crit")) {
show_critical_error();
} else if (!strcasecmp(argv[1], "resume")) {
led_resume_hook();
} else {
return EC_ERROR_PARAM1;
}
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(led, command_led, "[debug|white|off|alert|crit|resume]",
"Turn on/off LED.");
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