1
2
3#include <linux/kernel.h>
4#include <linux/init.h>
5
6#include <net/bluetooth/bluetooth.h>
7#include <net/bluetooth/hci_core.h>
8
9#ifndef CONFIG_BT_HCI_CORE_DEBUG
10#undef BT_DBG
11#define BT_DBG(D...)
12#endif
13
14struct class *bt_class = NULL;
15EXPORT_SYMBOL_GPL(bt_class);
16
17static struct workqueue_struct *btaddconn;
18static struct workqueue_struct *btdelconn;
19
20static inline char *link_typetostr(int type)
21{
22 switch (type) {
23 case ACL_LINK:
24 return "ACL";
25 case SCO_LINK:
26 return "SCO";
27 case ESCO_LINK:
28 return "eSCO";
29 default:
30 return "UNKNOWN";
31 }
32}
33
34static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf)
35{
36 struct hci_conn *conn = dev_get_drvdata(dev);
37 return sprintf(buf, "%s\n", link_typetostr(conn->type));
38}
39
40static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf)
41{
42 struct hci_conn *conn = dev_get_drvdata(dev);
43 bdaddr_t bdaddr;
44 baswap(&bdaddr, &conn->dst);
45 return sprintf(buf, "%s\n", batostr(&bdaddr));
46}
47
48static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf)
49{
50 struct hci_conn *conn = dev_get_drvdata(dev);
51
52 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
53 conn->features[0], conn->features[1],
54 conn->features[2], conn->features[3],
55 conn->features[4], conn->features[5],
56 conn->features[6], conn->features[7]);
57}
58
59#define LINK_ATTR(_name,_mode,_show,_store) \
60struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store)
61
62static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
63static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
64static LINK_ATTR(features, S_IRUGO, show_link_features, NULL);
65
66static struct attribute *bt_link_attrs[] = {
67 &link_attr_type.attr,
68 &link_attr_address.attr,
69 &link_attr_features.attr,
70 NULL
71};
72
73static struct attribute_group bt_link_group = {
74 .attrs = bt_link_attrs,
75};
76
77static struct attribute_group *bt_link_groups[] = {
78 &bt_link_group,
79 NULL
80};
81
82static void bt_link_release(struct device *dev)
83{
84 void *data = dev_get_drvdata(dev);
85 kfree(data);
86}
87
88static struct device_type bt_link = {
89 .name = "link",
90 .groups = bt_link_groups,
91 .release = bt_link_release,
92};
93
94static void add_conn(struct work_struct *work)
95{
96 struct hci_conn *conn = container_of(work, struct hci_conn, work);
97
98 flush_workqueue(btdelconn);
99
100 if (device_add(&conn->dev) < 0) {
101 BT_ERR("Failed to register connection device");
102 return;
103 }
104}
105
106void hci_conn_add_sysfs(struct hci_conn *conn)
107{
108 struct hci_dev *hdev = conn->hdev;
109
110 BT_DBG("conn %p", conn);
111
112 conn->dev.type = &bt_link;
113 conn->dev.class = bt_class;
114 conn->dev.parent = &hdev->dev;
115
116 snprintf(conn->dev.bus_id, BUS_ID_SIZE, "%s:%d",
117 hdev->name, conn->handle);
118
119 dev_set_drvdata(&conn->dev, conn);
120
121 device_initialize(&conn->dev);
122
123 INIT_WORK(&conn->work, add_conn);
124
125 queue_work(btaddconn, &conn->work);
126}
127
128
129
130
131
132
133static int __match_tty(struct device *dev, void *data)
134{
135 return !strncmp(dev->bus_id, "rfcomm", 6);
136}
137
138static void del_conn(struct work_struct *work)
139{
140 struct hci_conn *conn = container_of(work, struct hci_conn, work);
141 struct hci_dev *hdev = conn->hdev;
142
143 while (1) {
144 struct device *dev;
145
146 dev = device_find_child(&conn->dev, NULL, __match_tty);
147 if (!dev)
148 break;
149 device_move(dev, NULL);
150 put_device(dev);
151 }
152
153 device_del(&conn->dev);
154 put_device(&conn->dev);
155 hci_dev_put(hdev);
156}
157
158void hci_conn_del_sysfs(struct hci_conn *conn)
159{
160 BT_DBG("conn %p", conn);
161
162 if (!device_is_registered(&conn->dev))
163 return;
164
165 INIT_WORK(&conn->work, del_conn);
166
167 queue_work(btdelconn, &conn->work);
168}
169
170static inline char *host_typetostr(int type)
171{
172 switch (type) {
173 case HCI_VIRTUAL:
174 return "VIRTUAL";
175 case HCI_USB:
176 return "USB";
177 case HCI_PCCARD:
178 return "PCCARD";
179 case HCI_UART:
180 return "UART";
181 case HCI_RS232:
182 return "RS232";
183 case HCI_PCI:
184 return "PCI";
185 case HCI_SDIO:
186 return "SDIO";
187 default:
188 return "UNKNOWN";
189 }
190}
191
192static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
193{
194 struct hci_dev *hdev = dev_get_drvdata(dev);
195 return sprintf(buf, "%s\n", host_typetostr(hdev->type));
196}
197
198static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
199{
200 struct hci_dev *hdev = dev_get_drvdata(dev);
201 char name[249];
202 int i;
203
204 for (i = 0; i < 248; i++)
205 name[i] = hdev->dev_name[i];
206
207 name[248] = '\0';
208 return sprintf(buf, "%s\n", name);
209}
210
211static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
212{
213 struct hci_dev *hdev = dev_get_drvdata(dev);
214 return sprintf(buf, "0x%.2x%.2x%.2x\n",
215 hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
216}
217
218static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
219{
220 struct hci_dev *hdev = dev_get_drvdata(dev);
221 bdaddr_t bdaddr;
222 baswap(&bdaddr, &hdev->bdaddr);
223 return sprintf(buf, "%s\n", batostr(&bdaddr));
224}
225
226static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
227{
228 struct hci_dev *hdev = dev_get_drvdata(dev);
229
230 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
231 hdev->features[0], hdev->features[1],
232 hdev->features[2], hdev->features[3],
233 hdev->features[4], hdev->features[5],
234 hdev->features[6], hdev->features[7]);
235}
236
237static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
238{
239 struct hci_dev *hdev = dev_get_drvdata(dev);
240 return sprintf(buf, "%d\n", hdev->manufacturer);
241}
242
243static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf)
244{
245 struct hci_dev *hdev = dev_get_drvdata(dev);
246 return sprintf(buf, "%d\n", hdev->hci_ver);
247}
248
249static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf)
250{
251 struct hci_dev *hdev = dev_get_drvdata(dev);
252 return sprintf(buf, "%d\n", hdev->hci_rev);
253}
254
255static ssize_t show_inquiry_cache(struct device *dev, struct device_attribute *attr, char *buf)
256{
257 struct hci_dev *hdev = dev_get_drvdata(dev);
258 struct inquiry_cache *cache = &hdev->inq_cache;
259 struct inquiry_entry *e;
260 int n = 0;
261
262 hci_dev_lock_bh(hdev);
263
264 for (e = cache->list; e; e = e->next) {
265 struct inquiry_data *data = &e->data;
266 bdaddr_t bdaddr;
267 baswap(&bdaddr, &data->bdaddr);
268 n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
269 batostr(&bdaddr),
270 data->pscan_rep_mode, data->pscan_period_mode,
271 data->pscan_mode, data->dev_class[2],
272 data->dev_class[1], data->dev_class[0],
273 __le16_to_cpu(data->clock_offset),
274 data->rssi, data->ssp_mode, e->timestamp);
275 }
276
277 hci_dev_unlock_bh(hdev);
278 return n;
279}
280
281static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
282{
283 struct hci_dev *hdev = dev_get_drvdata(dev);
284 return sprintf(buf, "%d\n", hdev->idle_timeout);
285}
286
287static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
288{
289 struct hci_dev *hdev = dev_get_drvdata(dev);
290 char *ptr;
291 __u32 val;
292
293 val = simple_strtoul(buf, &ptr, 10);
294 if (ptr == buf)
295 return -EINVAL;
296
297 if (val != 0 && (val < 500 || val > 3600000))
298 return -EINVAL;
299
300 hdev->idle_timeout = val;
301
302 return count;
303}
304
305static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
306{
307 struct hci_dev *hdev = dev_get_drvdata(dev);
308 return sprintf(buf, "%d\n", hdev->sniff_max_interval);
309}
310
311static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
312{
313 struct hci_dev *hdev = dev_get_drvdata(dev);
314 char *ptr;
315 __u16 val;
316
317 val = simple_strtoul(buf, &ptr, 10);
318 if (ptr == buf)
319 return -EINVAL;
320
321 if (val < 0x0002 || val > 0xFFFE || val % 2)
322 return -EINVAL;
323
324 if (val < hdev->sniff_min_interval)
325 return -EINVAL;
326
327 hdev->sniff_max_interval = val;
328
329 return count;
330}
331
332static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
333{
334 struct hci_dev *hdev = dev_get_drvdata(dev);
335 return sprintf(buf, "%d\n", hdev->sniff_min_interval);
336}
337
338static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
339{
340 struct hci_dev *hdev = dev_get_drvdata(dev);
341 char *ptr;
342 __u16 val;
343
344 val = simple_strtoul(buf, &ptr, 10);
345 if (ptr == buf)
346 return -EINVAL;
347
348 if (val < 0x0002 || val > 0xFFFE || val % 2)
349 return -EINVAL;
350
351 if (val > hdev->sniff_max_interval)
352 return -EINVAL;
353
354 hdev->sniff_min_interval = val;
355
356 return count;
357}
358
359static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
360static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
361static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
362static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
363static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
364static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
365static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
366static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
367static DEVICE_ATTR(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL);
368
369static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
370 show_idle_timeout, store_idle_timeout);
371static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
372 show_sniff_max_interval, store_sniff_max_interval);
373static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
374 show_sniff_min_interval, store_sniff_min_interval);
375
376static struct attribute *bt_host_attrs[] = {
377 &dev_attr_type.attr,
378 &dev_attr_name.attr,
379 &dev_attr_class.attr,
380 &dev_attr_address.attr,
381 &dev_attr_features.attr,
382 &dev_attr_manufacturer.attr,
383 &dev_attr_hci_version.attr,
384 &dev_attr_hci_revision.attr,
385 &dev_attr_inquiry_cache.attr,
386 &dev_attr_idle_timeout.attr,
387 &dev_attr_sniff_max_interval.attr,
388 &dev_attr_sniff_min_interval.attr,
389 NULL
390};
391
392static struct attribute_group bt_host_group = {
393 .attrs = bt_host_attrs,
394};
395
396static struct attribute_group *bt_host_groups[] = {
397 &bt_host_group,
398 NULL
399};
400
401static void bt_host_release(struct device *dev)
402{
403 void *data = dev_get_drvdata(dev);
404 kfree(data);
405}
406
407static struct device_type bt_host = {
408 .name = "host",
409 .groups = bt_host_groups,
410 .release = bt_host_release,
411};
412
413int hci_register_sysfs(struct hci_dev *hdev)
414{
415 struct device *dev = &hdev->dev;
416 int err;
417
418 BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
419
420 dev->type = &bt_host;
421 dev->class = bt_class;
422 dev->parent = hdev->parent;
423
424 strlcpy(dev->bus_id, hdev->name, BUS_ID_SIZE);
425
426 dev_set_drvdata(dev, hdev);
427
428 err = device_register(dev);
429 if (err < 0)
430 return err;
431
432 return 0;
433}
434
435void hci_unregister_sysfs(struct hci_dev *hdev)
436{
437 BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
438
439 device_del(&hdev->dev);
440}
441
442int __init bt_sysfs_init(void)
443{
444 btaddconn = create_singlethread_workqueue("btaddconn");
445 if (!btaddconn)
446 return -ENOMEM;
447
448 btdelconn = create_singlethread_workqueue("btdelconn");
449 if (!btdelconn) {
450 destroy_workqueue(btaddconn);
451 return -ENOMEM;
452 }
453
454 bt_class = class_create(THIS_MODULE, "bluetooth");
455 if (IS_ERR(bt_class)) {
456 destroy_workqueue(btdelconn);
457 destroy_workqueue(btaddconn);
458 return PTR_ERR(bt_class);
459 }
460
461 return 0;
462}
463
464void bt_sysfs_cleanup(void)
465{
466 destroy_workqueue(btaddconn);
467 destroy_workqueue(btdelconn);
468
469 class_destroy(bt_class);
470}
471
