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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
6d5d2ee6 HK |
2 | /* |
3 | * Copyright 2015, Heiner Kallweit <hkallweit1@gmail.com> | |
6d5d2ee6 HK |
4 | */ |
5 | ||
6 | #include <net/bluetooth/bluetooth.h> | |
7 | #include <net/bluetooth/hci_core.h> | |
8 | ||
9 | #include "leds.h" | |
10 | ||
e64c97b5 MH |
11 | DEFINE_LED_TRIGGER(bt_power_led_trigger); |
12 | ||
6d5d2ee6 HK |
13 | struct hci_basic_led_trigger { |
14 | struct led_trigger led_trigger; | |
15 | struct hci_dev *hdev; | |
16 | }; | |
17 | ||
18 | #define to_hci_basic_led_trigger(arg) container_of(arg, \ | |
19 | struct hci_basic_led_trigger, led_trigger) | |
20 | ||
21 | void hci_leds_update_powered(struct hci_dev *hdev, bool enabled) | |
22 | { | |
23 | if (hdev->power_led) | |
24 | led_trigger_event(hdev->power_led, | |
25 | enabled ? LED_FULL : LED_OFF); | |
e64c97b5 MH |
26 | |
27 | if (!enabled) { | |
28 | struct hci_dev *d; | |
29 | ||
30 | read_lock(&hci_dev_list_lock); | |
31 | ||
32 | list_for_each_entry(d, &hci_dev_list, list) { | |
33 | if (test_bit(HCI_UP, &d->flags)) | |
34 | enabled = true; | |
35 | } | |
36 | ||
37 | read_unlock(&hci_dev_list_lock); | |
38 | } | |
39 | ||
40 | led_trigger_event(bt_power_led_trigger, enabled ? LED_FULL : LED_OFF); | |
6d5d2ee6 HK |
41 | } |
42 | ||
2282e125 | 43 | static int power_activate(struct led_classdev *led_cdev) |
6d5d2ee6 HK |
44 | { |
45 | struct hci_basic_led_trigger *htrig; | |
46 | bool powered; | |
47 | ||
48 | htrig = to_hci_basic_led_trigger(led_cdev->trigger); | |
49 | powered = test_bit(HCI_UP, &htrig->hdev->flags); | |
50 | ||
51 | led_trigger_event(led_cdev->trigger, powered ? LED_FULL : LED_OFF); | |
2282e125 UKK |
52 | |
53 | return 0; | |
6d5d2ee6 HK |
54 | } |
55 | ||
56 | static struct led_trigger *led_allocate_basic(struct hci_dev *hdev, | |
2282e125 | 57 | int (*activate)(struct led_classdev *led_cdev), |
6d5d2ee6 HK |
58 | const char *name) |
59 | { | |
60 | struct hci_basic_led_trigger *htrig; | |
61 | ||
62 | htrig = devm_kzalloc(&hdev->dev, sizeof(*htrig), GFP_KERNEL); | |
63 | if (!htrig) | |
64 | return NULL; | |
65 | ||
66 | htrig->hdev = hdev; | |
67 | htrig->led_trigger.activate = activate; | |
68 | htrig->led_trigger.name = devm_kasprintf(&hdev->dev, GFP_KERNEL, | |
69 | "%s-%s", hdev->name, | |
70 | name); | |
71 | if (!htrig->led_trigger.name) | |
72 | goto err_alloc; | |
73 | ||
b6e402fc | 74 | if (devm_led_trigger_register(&hdev->dev, &htrig->led_trigger)) |
6d5d2ee6 HK |
75 | goto err_register; |
76 | ||
77 | return &htrig->led_trigger; | |
78 | ||
79 | err_register: | |
80 | devm_kfree(&hdev->dev, (void *)htrig->led_trigger.name); | |
81 | err_alloc: | |
82 | devm_kfree(&hdev->dev, htrig); | |
83 | return NULL; | |
84 | } | |
85 | ||
86 | void hci_leds_init(struct hci_dev *hdev) | |
87 | { | |
88 | /* initialize power_led */ | |
89 | hdev->power_led = led_allocate_basic(hdev, power_activate, "power"); | |
90 | } | |
e64c97b5 MH |
91 | |
92 | void bt_leds_init(void) | |
93 | { | |
94 | led_trigger_register_simple("bluetooth-power", &bt_power_led_trigger); | |
95 | } | |
96 | ||
97 | void bt_leds_cleanup(void) | |
98 | { | |
99 | led_trigger_unregister_simple(bt_power_led_trigger); | |
100 | } |