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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2015, Heiner Kallweit <hkallweit1@gmail.com>
*/
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include "leds.h"
DEFINE_LED_TRIGGER(bt_power_led_trigger);
struct hci_basic_led_trigger {
struct led_trigger led_trigger;
struct hci_dev *hdev;
};
#define to_hci_basic_led_trigger(arg) container_of(arg, \
struct hci_basic_led_trigger, led_trigger)
void hci_leds_update_powered(struct hci_dev *hdev, bool enabled)
{
if (hdev->power_led)
led_trigger_event(hdev->power_led,
enabled ? LED_FULL : LED_OFF);
if (!enabled) {
struct hci_dev *d;
read_lock(&hci_dev_list_lock);
list_for_each_entry(d, &hci_dev_list, list) {
if (test_bit(HCI_UP, &d->flags))
enabled = true;
}
read_unlock(&hci_dev_list_lock);
}
led_trigger_event(bt_power_led_trigger, enabled ? LED_FULL : LED_OFF);
}
static int power_activate(struct led_classdev *led_cdev)
{
struct hci_basic_led_trigger *htrig;
bool powered;
htrig = to_hci_basic_led_trigger(led_cdev->trigger);
powered = test_bit(HCI_UP, &htrig->hdev->flags);
led_set_brightness(led_cdev, powered ? LED_FULL : LED_OFF);
return 0;
}
static struct led_trigger *led_allocate_basic(struct hci_dev *hdev,
int (*activate)(struct led_classdev *led_cdev),
const char *name)
{
struct hci_basic_led_trigger *htrig;
htrig = devm_kzalloc(&hdev->dev, sizeof(*htrig), GFP_KERNEL);
if (!htrig)
return NULL;
htrig->hdev = hdev;
htrig->led_trigger.activate = activate;
htrig->led_trigger.name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
"%s-%s", hdev->name,
name);
if (!htrig->led_trigger.name)
goto err_alloc;
if (devm_led_trigger_register(&hdev->dev, &htrig->led_trigger))
goto err_register;
return &htrig->led_trigger;
err_register:
devm_kfree(&hdev->dev, (void *)htrig->led_trigger.name);
err_alloc:
devm_kfree(&hdev->dev, htrig);
return NULL;
}
void hci_leds_init(struct hci_dev *hdev)
{
/* initialize power_led */
hdev->power_led = led_allocate_basic(hdev, power_activate, "power");
}
void bt_leds_init(void)
{
led_trigger_register_simple("bluetooth-power", &bt_power_led_trigger);
}
void bt_leds_cleanup(void)
{
led_trigger_unregister_simple(bt_power_led_trigger);
}
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