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1// SPDX-License-Identifier: GPL-2.0
2/* Bluetooth HCI driver model support. */
3
4#include <linux/module.h>
5
6#include <net/bluetooth/bluetooth.h>
7#include <net/bluetooth/hci_core.h>
8
9static const struct class bt_class = {
10 .name = "bluetooth",
11};
12
13static void bt_link_release(struct device *dev)
14{
15 struct hci_conn *conn = to_hci_conn(dev);
16 kfree(conn);
17}
18
19static const struct device_type bt_link = {
20 .name = "link",
21 .release = bt_link_release,
22};
23
24/*
25 * The rfcomm tty device will possibly retain even when conn
26 * is down, and sysfs doesn't support move zombie device,
27 * so we should move the device before conn device is destroyed.
28 */
29static int __match_tty(struct device *dev, void *data)
30{
31 return !strncmp(dev_name(dev), "rfcomm", 6);
32}
33
34void hci_conn_init_sysfs(struct hci_conn *conn)
35{
36 struct hci_dev *hdev = conn->hdev;
37
38 bt_dev_dbg(hdev, "conn %p", conn);
39
40 conn->dev.type = &bt_link;
41 conn->dev.class = &bt_class;
42 conn->dev.parent = &hdev->dev;
43
44 device_initialize(&conn->dev);
45}
46
47void hci_conn_add_sysfs(struct hci_conn *conn)
48{
49 struct hci_dev *hdev = conn->hdev;
50
51 bt_dev_dbg(hdev, "conn %p", conn);
52
53 if (device_is_registered(&conn->dev))
54 return;
55
56 dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
57
58 if (device_add(&conn->dev) < 0)
59 bt_dev_err(hdev, "failed to register connection device");
60}
61
62void hci_conn_del_sysfs(struct hci_conn *conn)
63{
64 struct hci_dev *hdev = conn->hdev;
65
66 bt_dev_dbg(hdev, "conn %p", conn);
67
68 if (!device_is_registered(&conn->dev)) {
69 /* If device_add() has *not* succeeded, use *only* put_device()
70 * to drop the reference count.
71 */
72 put_device(&conn->dev);
73 return;
74 }
75
76 while (1) {
77 struct device *dev;
78
79 dev = device_find_child(&conn->dev, NULL, __match_tty);
80 if (!dev)
81 break;
82 device_move(dev, NULL, DPM_ORDER_DEV_LAST);
83 put_device(dev);
84 }
85
86 device_unregister(&conn->dev);
87}
88
89static void bt_host_release(struct device *dev)
90{
91 struct hci_dev *hdev = to_hci_dev(dev);
92
93 if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
94 hci_release_dev(hdev);
95 else
96 kfree(hdev);
97 module_put(THIS_MODULE);
98}
99
100static const struct device_type bt_host = {
101 .name = "host",
102 .release = bt_host_release,
103};
104
105void hci_init_sysfs(struct hci_dev *hdev)
106{
107 struct device *dev = &hdev->dev;
108
109 dev->type = &bt_host;
110 dev->class = &bt_class;
111
112 __module_get(THIS_MODULE);
113 device_initialize(dev);
114}
115
116int __init bt_sysfs_init(void)
117{
118 return class_register(&bt_class);
119}
120
121void bt_sysfs_cleanup(void)
122{
123 class_unregister(&bt_class);
124}
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 inline char *link_typetostr(int type)
11{
12 switch (type) {
13 case ACL_LINK:
14 return "ACL";
15 case SCO_LINK:
16 return "SCO";
17 case ESCO_LINK:
18 return "eSCO";
19 case LE_LINK:
20 return "LE";
21 default:
22 return "UNKNOWN";
23 }
24}
25
26static ssize_t show_link_type(struct device *dev,
27 struct device_attribute *attr, char *buf)
28{
29 struct hci_conn *conn = to_hci_conn(dev);
30 return sprintf(buf, "%s\n", link_typetostr(conn->type));
31}
32
33static ssize_t show_link_address(struct device *dev,
34 struct device_attribute *attr, char *buf)
35{
36 struct hci_conn *conn = to_hci_conn(dev);
37 return sprintf(buf, "%pMR\n", &conn->dst);
38}
39
40#define LINK_ATTR(_name, _mode, _show, _store) \
41struct device_attribute link_attr_##_name = __ATTR(_name, _mode, _show, _store)
42
43static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
44static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
45
46static struct attribute *bt_link_attrs[] = {
47 &link_attr_type.attr,
48 &link_attr_address.attr,
49 NULL
50};
51
52ATTRIBUTE_GROUPS(bt_link);
53
54static void bt_link_release(struct device *dev)
55{
56 struct hci_conn *conn = to_hci_conn(dev);
57 kfree(conn);
58}
59
60static struct device_type bt_link = {
61 .name = "link",
62 .groups = bt_link_groups,
63 .release = bt_link_release,
64};
65
66/*
67 * The rfcomm tty device will possibly retain even when conn
68 * is down, and sysfs doesn't support move zombie device,
69 * so we should move the device before conn device is destroyed.
70 */
71static int __match_tty(struct device *dev, void *data)
72{
73 return !strncmp(dev_name(dev), "rfcomm", 6);
74}
75
76void hci_conn_init_sysfs(struct hci_conn *conn)
77{
78 struct hci_dev *hdev = conn->hdev;
79
80 BT_DBG("conn %p", conn);
81
82 conn->dev.type = &bt_link;
83 conn->dev.class = bt_class;
84 conn->dev.parent = &hdev->dev;
85
86 device_initialize(&conn->dev);
87}
88
89void hci_conn_add_sysfs(struct hci_conn *conn)
90{
91 struct hci_dev *hdev = conn->hdev;
92
93 BT_DBG("conn %p", conn);
94
95 dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
96
97 if (device_add(&conn->dev) < 0) {
98 BT_ERR("Failed to register connection device");
99 return;
100 }
101
102 hci_dev_hold(hdev);
103}
104
105void hci_conn_del_sysfs(struct hci_conn *conn)
106{
107 struct hci_dev *hdev = conn->hdev;
108
109 if (!device_is_registered(&conn->dev))
110 return;
111
112 while (1) {
113 struct device *dev;
114
115 dev = device_find_child(&conn->dev, NULL, __match_tty);
116 if (!dev)
117 break;
118 device_move(dev, NULL, DPM_ORDER_DEV_LAST);
119 put_device(dev);
120 }
121
122 device_del(&conn->dev);
123
124 hci_dev_put(hdev);
125}
126
127static inline char *host_typetostr(int type)
128{
129 switch (type) {
130 case HCI_BREDR:
131 return "BR/EDR";
132 case HCI_AMP:
133 return "AMP";
134 default:
135 return "UNKNOWN";
136 }
137}
138
139static ssize_t show_type(struct device *dev,
140 struct device_attribute *attr, char *buf)
141{
142 struct hci_dev *hdev = to_hci_dev(dev);
143 return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
144}
145
146static ssize_t show_name(struct device *dev,
147 struct device_attribute *attr, char *buf)
148{
149 struct hci_dev *hdev = to_hci_dev(dev);
150 char name[HCI_MAX_NAME_LENGTH + 1];
151 int i;
152
153 for (i = 0; i < HCI_MAX_NAME_LENGTH; i++)
154 name[i] = hdev->dev_name[i];
155
156 name[HCI_MAX_NAME_LENGTH] = '\0';
157 return sprintf(buf, "%s\n", name);
158}
159
160static ssize_t show_address(struct device *dev,
161 struct device_attribute *attr, char *buf)
162{
163 struct hci_dev *hdev = to_hci_dev(dev);
164 return sprintf(buf, "%pMR\n", &hdev->bdaddr);
165}
166
167static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
168static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
169static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
170
171static struct attribute *bt_host_attrs[] = {
172 &dev_attr_type.attr,
173 &dev_attr_name.attr,
174 &dev_attr_address.attr,
175 NULL
176};
177
178ATTRIBUTE_GROUPS(bt_host);
179
180static void bt_host_release(struct device *dev)
181{
182 struct hci_dev *hdev = to_hci_dev(dev);
183 kfree(hdev);
184 module_put(THIS_MODULE);
185}
186
187static struct device_type bt_host = {
188 .name = "host",
189 .groups = bt_host_groups,
190 .release = bt_host_release,
191};
192
193void hci_init_sysfs(struct hci_dev *hdev)
194{
195 struct device *dev = &hdev->dev;
196
197 dev->type = &bt_host;
198 dev->class = bt_class;
199
200 __module_get(THIS_MODULE);
201 device_initialize(dev);
202}
203
204int __init bt_sysfs_init(void)
205{
206 bt_class = class_create(THIS_MODULE, "bluetooth");
207
208 return PTR_ERR_OR_ZERO(bt_class);
209}
210
211void bt_sysfs_cleanup(void)
212{
213 class_destroy(bt_class);
214}