blob: ded7c88eaccceb1b2bd74a7fff77a5001697f6eb [file] [log] [blame]
Heiner Kallweit6d5d2ee2016-01-08 19:28:58 +01001/*
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 (led_trigger_register(&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}
75
76void hci_leds_exit(struct hci_dev *hdev)
77{
78 if (hdev->power_led)
79 led_trigger_unregister(hdev->power_led);
80}