1/*
 2 * Copyright 2015, Heiner Kallweit <hkallweit1@gmail.com>
 3 *
 4 * This program is free software; you can redistribute it and/or modify
 5 * it under the terms of the GNU General Public License version 2 as
 6 * published by the Free Software Foundation.
 7 */
 8
 9#include <net/bluetooth/bluetooth.h>
10#include <net/bluetooth/hci_core.h>
11
12#include "leds.h"
13
14struct hci_basic_led_trigger {
15	struct led_trigger	led_trigger;
16	struct hci_dev		*hdev;
17};
18
19#define to_hci_basic_led_trigger(arg) container_of(arg, \
20			struct hci_basic_led_trigger, led_trigger)
21
22void hci_leds_update_powered(struct hci_dev *hdev, bool enabled)
23{
24	if (hdev->power_led)
25		led_trigger_event(hdev->power_led,
26				  enabled ? LED_FULL : LED_OFF);
27}
28
29static void power_activate(struct led_classdev *led_cdev)
30{
31	struct hci_basic_led_trigger *htrig;
32	bool powered;
33
34	htrig = to_hci_basic_led_trigger(led_cdev->trigger);
35	powered = test_bit(HCI_UP, &htrig->hdev->flags);
36
37	led_trigger_event(led_cdev->trigger, powered ? LED_FULL : LED_OFF);
38}
39
40static struct led_trigger *led_allocate_basic(struct hci_dev *hdev,
41			void (*activate)(struct led_classdev *led_cdev),
42			const char *name)
43{
44	struct hci_basic_led_trigger *htrig;
45
46	htrig =	devm_kzalloc(&hdev->dev, sizeof(*htrig), GFP_KERNEL);
47	if (!htrig)
48		return NULL;
49
50	htrig->hdev = hdev;
51	htrig->led_trigger.activate = activate;
52	htrig->led_trigger.name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
53						 "%s-%s", hdev->name,
54						 name);
55	if (!htrig->led_trigger.name)
56		goto err_alloc;
57
58	if (devm_led_trigger_register(&hdev->dev, &htrig->led_trigger))
59		goto err_register;
60
61	return &htrig->led_trigger;
62
63err_register:
64	devm_kfree(&hdev->dev, (void *)htrig->led_trigger.name);
65err_alloc:
66	devm_kfree(&hdev->dev, htrig);
67	return NULL;
68}
69
70void hci_leds_init(struct hci_dev *hdev)
71{
72	/* initialize power_led */
73	hdev->power_led = led_allocate_basic(hdev, power_activate, "power");
74}