1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright 2015, Heiner Kallweit <hkallweit1@gmail.com> |
4 | */ |
5 | |
6 | #include <net/bluetooth/bluetooth.h> |
7 | #include <net/bluetooth/hci_core.h> |
8 | |
9 | #include "leds.h" |
10 | |
11 | DEFINE_LED_TRIGGER(bt_power_led_trigger); |
12 | |
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(trigger: hdev->power_led, |
25 | event: enabled ? LED_FULL : LED_OFF); |
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(trigger: bt_power_led_trigger, event: enabled ? LED_FULL : LED_OFF); |
41 | } |
42 | |
43 | static int power_activate(struct led_classdev *led_cdev) |
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(trigger: led_cdev->trigger, event: powered ? LED_FULL : LED_OFF); |
52 | |
53 | return 0; |
54 | } |
55 | |
56 | static struct led_trigger *led_allocate_basic(struct hci_dev *hdev, |
57 | int (*activate)(struct led_classdev *led_cdev), |
58 | const char *name) |
59 | { |
60 | struct hci_basic_led_trigger *htrig; |
61 | |
62 | htrig = devm_kzalloc(dev: &hdev->dev, size: 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(dev: &hdev->dev, GFP_KERNEL, |
69 | fmt: "%s-%s" , hdev->name, |
70 | name); |
71 | if (!htrig->led_trigger.name) |
72 | goto err_alloc; |
73 | |
74 | if (devm_led_trigger_register(dev: &hdev->dev, trigger: &htrig->led_trigger)) |
75 | goto err_register; |
76 | |
77 | return &htrig->led_trigger; |
78 | |
79 | err_register: |
80 | devm_kfree(dev: &hdev->dev, p: (void *)htrig->led_trigger.name); |
81 | err_alloc: |
82 | devm_kfree(dev: &hdev->dev, p: 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, activate: power_activate, name: "power" ); |
90 | } |
91 | |
92 | void bt_leds_init(void) |
93 | { |
94 | led_trigger_register_simple(name: "bluetooth-power" , trigger: &bt_power_led_trigger); |
95 | } |
96 | |
97 | void bt_leds_cleanup(void) |
98 | { |
99 | led_trigger_unregister_simple(trigger: bt_power_led_trigger); |
100 | } |
101 | |