1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /* Bluetooth HCI driver model support. */
3*4882a593Smuzhiyun
4*4882a593Smuzhiyun #include <linux/module.h>
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <net/bluetooth/bluetooth.h>
7*4882a593Smuzhiyun #include <net/bluetooth/hci_core.h>
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun static struct class *bt_class;
10*4882a593Smuzhiyun
bt_link_release(struct device * dev)11*4882a593Smuzhiyun static void bt_link_release(struct device *dev)
12*4882a593Smuzhiyun {
13*4882a593Smuzhiyun struct hci_conn *conn = to_hci_conn(dev);
14*4882a593Smuzhiyun kfree(conn);
15*4882a593Smuzhiyun }
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun static const struct device_type bt_link = {
18*4882a593Smuzhiyun .name = "link",
19*4882a593Smuzhiyun .release = bt_link_release,
20*4882a593Smuzhiyun };
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun /*
23*4882a593Smuzhiyun * The rfcomm tty device will possibly retain even when conn
24*4882a593Smuzhiyun * is down, and sysfs doesn't support move zombie device,
25*4882a593Smuzhiyun * so we should move the device before conn device is destroyed.
26*4882a593Smuzhiyun */
__match_tty(struct device * dev,void * data)27*4882a593Smuzhiyun static int __match_tty(struct device *dev, void *data)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun return !strncmp(dev_name(dev), "rfcomm", 6);
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun
hci_conn_init_sysfs(struct hci_conn * conn)32*4882a593Smuzhiyun void hci_conn_init_sysfs(struct hci_conn *conn)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun struct hci_dev *hdev = conn->hdev;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun BT_DBG("conn %p", conn);
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun conn->dev.type = &bt_link;
39*4882a593Smuzhiyun conn->dev.class = bt_class;
40*4882a593Smuzhiyun conn->dev.parent = &hdev->dev;
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun device_initialize(&conn->dev);
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
hci_conn_add_sysfs(struct hci_conn * conn)45*4882a593Smuzhiyun void hci_conn_add_sysfs(struct hci_conn *conn)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun struct hci_dev *hdev = conn->hdev;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun BT_DBG("conn %p", conn);
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun if (device_is_registered(&conn->dev))
52*4882a593Smuzhiyun return;
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun if (device_add(&conn->dev) < 0) {
57*4882a593Smuzhiyun bt_dev_err(hdev, "failed to register connection device");
58*4882a593Smuzhiyun return;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun hci_dev_hold(hdev);
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
hci_conn_del_sysfs(struct hci_conn * conn)64*4882a593Smuzhiyun void hci_conn_del_sysfs(struct hci_conn *conn)
65*4882a593Smuzhiyun {
66*4882a593Smuzhiyun struct hci_dev *hdev = conn->hdev;
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun if (!device_is_registered(&conn->dev))
69*4882a593Smuzhiyun return;
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun while (1) {
72*4882a593Smuzhiyun struct device *dev;
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun dev = device_find_child(&conn->dev, NULL, __match_tty);
75*4882a593Smuzhiyun if (!dev)
76*4882a593Smuzhiyun break;
77*4882a593Smuzhiyun device_move(dev, NULL, DPM_ORDER_DEV_LAST);
78*4882a593Smuzhiyun put_device(dev);
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun device_del(&conn->dev);
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun hci_dev_put(hdev);
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun
bt_host_release(struct device * dev)86*4882a593Smuzhiyun static void bt_host_release(struct device *dev)
87*4882a593Smuzhiyun {
88*4882a593Smuzhiyun struct hci_dev *hdev = to_hci_dev(dev);
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
91*4882a593Smuzhiyun hci_cleanup_dev(hdev);
92*4882a593Smuzhiyun kfree(hdev);
93*4882a593Smuzhiyun module_put(THIS_MODULE);
94*4882a593Smuzhiyun }
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun static const struct device_type bt_host = {
97*4882a593Smuzhiyun .name = "host",
98*4882a593Smuzhiyun .release = bt_host_release,
99*4882a593Smuzhiyun };
100*4882a593Smuzhiyun
hci_init_sysfs(struct hci_dev * hdev)101*4882a593Smuzhiyun void hci_init_sysfs(struct hci_dev *hdev)
102*4882a593Smuzhiyun {
103*4882a593Smuzhiyun struct device *dev = &hdev->dev;
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun dev->type = &bt_host;
106*4882a593Smuzhiyun dev->class = bt_class;
107*4882a593Smuzhiyun
108*4882a593Smuzhiyun __module_get(THIS_MODULE);
109*4882a593Smuzhiyun device_initialize(dev);
110*4882a593Smuzhiyun }
111*4882a593Smuzhiyun
bt_sysfs_init(void)112*4882a593Smuzhiyun int __init bt_sysfs_init(void)
113*4882a593Smuzhiyun {
114*4882a593Smuzhiyun bt_class = class_create(THIS_MODULE, "bluetooth");
115*4882a593Smuzhiyun
116*4882a593Smuzhiyun return PTR_ERR_OR_ZERO(bt_class);
117*4882a593Smuzhiyun }
118*4882a593Smuzhiyun
bt_sysfs_cleanup(void)119*4882a593Smuzhiyun void bt_sysfs_cleanup(void)
120*4882a593Smuzhiyun {
121*4882a593Smuzhiyun class_destroy(bt_class);
122*4882a593Smuzhiyun }
123