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6d5d2ee6 HK |
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 | ||
e64c97b5 MH |
14 | DEFINE_LED_TRIGGER(bt_power_led_trigger); |
15 | ||
6d5d2ee6 HK |
16 | struct hci_basic_led_trigger { |
17 | struct led_trigger led_trigger; | |
18 | struct hci_dev *hdev; | |
19 | }; | |
20 | ||
21 | #define to_hci_basic_led_trigger(arg) container_of(arg, \ | |
22 | struct hci_basic_led_trigger, led_trigger) | |
23 | ||
24 | void hci_leds_update_powered(struct hci_dev *hdev, bool enabled) | |
25 | { | |
26 | if (hdev->power_led) | |
27 | led_trigger_event(hdev->power_led, | |
28 | enabled ? LED_FULL : LED_OFF); | |
e64c97b5 MH |
29 | |
30 | if (!enabled) { | |
31 | struct hci_dev *d; | |
32 | ||
33 | read_lock(&hci_dev_list_lock); | |
34 | ||
35 | list_for_each_entry(d, &hci_dev_list, list) { | |
36 | if (test_bit(HCI_UP, &d->flags)) | |
37 | enabled = true; | |
38 | } | |
39 | ||
40 | read_unlock(&hci_dev_list_lock); | |
41 | } | |
42 | ||
43 | led_trigger_event(bt_power_led_trigger, enabled ? LED_FULL : LED_OFF); | |
6d5d2ee6 HK |
44 | } |
45 | ||
46 | static void power_activate(struct led_classdev *led_cdev) | |
47 | { | |
48 | struct hci_basic_led_trigger *htrig; | |
49 | bool powered; | |
50 | ||
51 | htrig = to_hci_basic_led_trigger(led_cdev->trigger); | |
52 | powered = test_bit(HCI_UP, &htrig->hdev->flags); | |
53 | ||
54 | led_trigger_event(led_cdev->trigger, powered ? LED_FULL : LED_OFF); | |
55 | } | |
56 | ||
57 | static struct led_trigger *led_allocate_basic(struct hci_dev *hdev, | |
58 | void (*activate)(struct led_classdev *led_cdev), | |
59 | const char *name) | |
60 | { | |
61 | struct hci_basic_led_trigger *htrig; | |
62 | ||
63 | htrig = devm_kzalloc(&hdev->dev, sizeof(*htrig), GFP_KERNEL); | |
64 | if (!htrig) | |
65 | return NULL; | |
66 | ||
67 | htrig->hdev = hdev; | |
68 | htrig->led_trigger.activate = activate; | |
69 | htrig->led_trigger.name = devm_kasprintf(&hdev->dev, GFP_KERNEL, | |
70 | "%s-%s", hdev->name, | |
71 | name); | |
72 | if (!htrig->led_trigger.name) | |
73 | goto err_alloc; | |
74 | ||
b6e402fc | 75 | if (devm_led_trigger_register(&hdev->dev, &htrig->led_trigger)) |
6d5d2ee6 HK |
76 | goto err_register; |
77 | ||
78 | return &htrig->led_trigger; | |
79 | ||
80 | err_register: | |
81 | devm_kfree(&hdev->dev, (void *)htrig->led_trigger.name); | |
82 | err_alloc: | |
83 | devm_kfree(&hdev->dev, htrig); | |
84 | return NULL; | |
85 | } | |
86 | ||
87 | void hci_leds_init(struct hci_dev *hdev) | |
88 | { | |
89 | /* initialize power_led */ | |
90 | hdev->power_led = led_allocate_basic(hdev, power_activate, "power"); | |
91 | } | |
e64c97b5 MH |
92 | |
93 | void bt_leds_init(void) | |
94 | { | |
95 | led_trigger_register_simple("bluetooth-power", &bt_power_led_trigger); | |
96 | } | |
97 | ||
98 | void bt_leds_cleanup(void) | |
99 | { | |
100 | led_trigger_unregister_simple(bt_power_led_trigger); | |
101 | } |