// 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_trigger_event(led_cdev->trigger, 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);
  }