tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* Bluetooth HCI driver model support. */
2
3#include <linux/module.h>
4
5#include <net/bluetooth/bluetooth.h>
6#include <net/bluetooth/hci_core.h>
7
8static struct class *bt_class;
9
10static void bt_link_release(struct device *dev)
11{
12 struct hci_conn *conn = to_hci_conn(dev);
13 kfree(conn);
14}
15
16static struct device_type bt_link = {
17 .name = "link",
18 .release = bt_link_release,
19};
20
21/*
22 * The rfcomm tty device will possibly retain even when conn
23 * is down, and sysfs doesn't support move zombie device,
24 * so we should move the device before conn device is destroyed.
25 */
26static int __match_tty(struct device *dev, void *data)
27{
28 return !strncmp(dev_name(dev), "rfcomm", 6);
29}
30
31void hci_conn_init_sysfs(struct hci_conn *conn)
32{
33 struct hci_dev *hdev = conn->hdev;
34
35 BT_DBG("conn %p", conn);
36
37 conn->dev.type = &bt_link;
38 conn->dev.class = bt_class;
39 conn->dev.parent = &hdev->dev;
40
41 device_initialize(&conn->dev);
42}
43
44void hci_conn_add_sysfs(struct hci_conn *conn)
45{
46 struct hci_dev *hdev = conn->hdev;
47
48 BT_DBG("conn %p", conn);
49
50 dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
51
52 if (device_add(&conn->dev) < 0) {
53 BT_ERR("Failed to register connection device");
54 return;
55 }
56
57 hci_dev_hold(hdev);
58}
59
60void hci_conn_del_sysfs(struct hci_conn *conn)
61{
62 struct hci_dev *hdev = conn->hdev;
63
64 if (!device_is_registered(&conn->dev))
65 return;
66
67 while (1) {
68 struct device *dev;
69
70 dev = device_find_child(&conn->dev, NULL, __match_tty);
71 if (!dev)
72 break;
73 device_move(dev, NULL, DPM_ORDER_DEV_LAST);
74 put_device(dev);
75 }
76
77 device_del(&conn->dev);
78
79 hci_dev_put(hdev);
80}
81
82static void bt_host_release(struct device *dev)
83{
84 struct hci_dev *hdev = to_hci_dev(dev);
85 kfree(hdev);
86 module_put(THIS_MODULE);
87}
88
89static struct device_type bt_host = {
90 .name = "host",
91 .release = bt_host_release,
92};
93
94void hci_init_sysfs(struct hci_dev *hdev)
95{
96 struct device *dev = &hdev->dev;
97
98 dev->type = &bt_host;
99 dev->class = bt_class;
100
101 __module_get(THIS_MODULE);
102 device_initialize(dev);
103}
104
105int __init bt_sysfs_init(void)
106{
107 bt_class = class_create(THIS_MODULE, "bluetooth");
108
109 return PTR_ERR_OR_ZERO(bt_class);
110}
111
112void bt_sysfs_cleanup(void)
113{
114 class_destroy(bt_class);
115}