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1 | /* Bluetooth HCI driver model support. */ |
2 | |
3 | #include <linux/kernel.h> |
4 | #include <linux/slab.h> |
5 | #include <linux/init.h> |
6 | #include <linux/debugfs.h> |
7 | #include <linux/seq_file.h> |
8 | |
9 | #include <net/bluetooth/bluetooth.h> |
10 | #include <net/bluetooth/hci_core.h> |
11 | |
12 | static struct class *bt_class; |
13 | |
14 | struct dentry *bt_debugfs = NULL; |
15 | EXPORT_SYMBOL_GPL(bt_debugfs); |
16 | |
17 | static inline char *link_typetostr(int type) |
18 | { |
19 | switch (type) { |
20 | case ACL_LINK: |
21 | return "ACL"; |
22 | case SCO_LINK: |
23 | return "SCO"; |
24 | case ESCO_LINK: |
25 | return "eSCO"; |
26 | default: |
27 | return "UNKNOWN"; |
28 | } |
29 | } |
30 | |
31 | static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf) |
32 | { |
33 | struct hci_conn *conn = dev_get_drvdata(dev); |
34 | return sprintf(buf, "%s\n", link_typetostr(conn->type)); |
35 | } |
36 | |
37 | static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf) |
38 | { |
39 | struct hci_conn *conn = dev_get_drvdata(dev); |
40 | return sprintf(buf, "%s\n", batostr(&conn->dst)); |
41 | } |
42 | |
43 | static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf) |
44 | { |
45 | struct hci_conn *conn = dev_get_drvdata(dev); |
46 | |
47 | return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", |
48 | conn->features[0], conn->features[1], |
49 | conn->features[2], conn->features[3], |
50 | conn->features[4], conn->features[5], |
51 | conn->features[6], conn->features[7]); |
52 | } |
53 | |
54 | #define LINK_ATTR(_name,_mode,_show,_store) \ |
55 | struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store) |
56 | |
57 | static LINK_ATTR(type, S_IRUGO, show_link_type, NULL); |
58 | static LINK_ATTR(address, S_IRUGO, show_link_address, NULL); |
59 | static LINK_ATTR(features, S_IRUGO, show_link_features, NULL); |
60 | |
61 | static struct attribute *bt_link_attrs[] = { |
62 | &link_attr_type.attr, |
63 | &link_attr_address.attr, |
64 | &link_attr_features.attr, |
65 | NULL |
66 | }; |
67 | |
68 | static struct attribute_group bt_link_group = { |
69 | .attrs = bt_link_attrs, |
70 | }; |
71 | |
72 | static const struct attribute_group *bt_link_groups[] = { |
73 | &bt_link_group, |
74 | NULL |
75 | }; |
76 | |
77 | static void bt_link_release(struct device *dev) |
78 | { |
79 | void *data = dev_get_drvdata(dev); |
80 | kfree(data); |
81 | } |
82 | |
83 | static struct device_type bt_link = { |
84 | .name = "link", |
85 | .groups = bt_link_groups, |
86 | .release = bt_link_release, |
87 | }; |
88 | |
89 | static void add_conn(struct work_struct *work) |
90 | { |
91 | struct hci_conn *conn = container_of(work, struct hci_conn, work_add); |
92 | struct hci_dev *hdev = conn->hdev; |
93 | |
94 | dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle); |
95 | |
96 | dev_set_drvdata(&conn->dev, conn); |
97 | |
98 | if (device_add(&conn->dev) < 0) { |
99 | BT_ERR("Failed to register connection device"); |
100 | return; |
101 | } |
102 | |
103 | hci_dev_hold(hdev); |
104 | } |
105 | |
106 | /* |
107 | * The rfcomm tty device will possibly retain even when conn |
108 | * is down, and sysfs doesn't support move zombie device, |
109 | * so we should move the device before conn device is destroyed. |
110 | */ |
111 | static int __match_tty(struct device *dev, void *data) |
112 | { |
113 | return !strncmp(dev_name(dev), "rfcomm", 6); |
114 | } |
115 | |
116 | static void del_conn(struct work_struct *work) |
117 | { |
118 | struct hci_conn *conn = container_of(work, struct hci_conn, work_del); |
119 | struct hci_dev *hdev = conn->hdev; |
120 | |
121 | if (!device_is_registered(&conn->dev)) |
122 | return; |
123 | |
124 | while (1) { |
125 | struct device *dev; |
126 | |
127 | dev = device_find_child(&conn->dev, NULL, __match_tty); |
128 | if (!dev) |
129 | break; |
130 | device_move(dev, NULL, DPM_ORDER_DEV_LAST); |
131 | put_device(dev); |
132 | } |
133 | |
134 | device_del(&conn->dev); |
135 | put_device(&conn->dev); |
136 | |
137 | hci_dev_put(hdev); |
138 | } |
139 | |
140 | void hci_conn_init_sysfs(struct hci_conn *conn) |
141 | { |
142 | struct hci_dev *hdev = conn->hdev; |
143 | |
144 | BT_DBG("conn %p", conn); |
145 | |
146 | conn->dev.type = &bt_link; |
147 | conn->dev.class = bt_class; |
148 | conn->dev.parent = &hdev->dev; |
149 | |
150 | device_initialize(&conn->dev); |
151 | |
152 | INIT_WORK(&conn->work_add, add_conn); |
153 | INIT_WORK(&conn->work_del, del_conn); |
154 | } |
155 | |
156 | void hci_conn_add_sysfs(struct hci_conn *conn) |
157 | { |
158 | BT_DBG("conn %p", conn); |
159 | |
160 | queue_work(conn->hdev->workqueue, &conn->work_add); |
161 | } |
162 | |
163 | void hci_conn_del_sysfs(struct hci_conn *conn) |
164 | { |
165 | BT_DBG("conn %p", conn); |
166 | |
167 | queue_work(conn->hdev->workqueue, &conn->work_del); |
168 | } |
169 | |
170 | static inline char *host_bustostr(int bus) |
171 | { |
172 | switch (bus) { |
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 | |
192 | static inline char *host_typetostr(int type) |
193 | { |
194 | switch (type) { |
195 | case HCI_BREDR: |
196 | return "BR/EDR"; |
197 | case HCI_AMP: |
198 | return "AMP"; |
199 | default: |
200 | return "UNKNOWN"; |
201 | } |
202 | } |
203 | |
204 | static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf) |
205 | { |
206 | struct hci_dev *hdev = dev_get_drvdata(dev); |
207 | return sprintf(buf, "%s\n", host_bustostr(hdev->bus)); |
208 | } |
209 | |
210 | static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf) |
211 | { |
212 | struct hci_dev *hdev = dev_get_drvdata(dev); |
213 | return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type)); |
214 | } |
215 | |
216 | static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf) |
217 | { |
218 | struct hci_dev *hdev = dev_get_drvdata(dev); |
219 | char name[249]; |
220 | int i; |
221 | |
222 | for (i = 0; i < 248; i++) |
223 | name[i] = hdev->dev_name[i]; |
224 | |
225 | name[248] = '\0'; |
226 | return sprintf(buf, "%s\n", name); |
227 | } |
228 | |
229 | static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf) |
230 | { |
231 | struct hci_dev *hdev = dev_get_drvdata(dev); |
232 | return sprintf(buf, "0x%.2x%.2x%.2x\n", |
233 | hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]); |
234 | } |
235 | |
236 | static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf) |
237 | { |
238 | struct hci_dev *hdev = dev_get_drvdata(dev); |
239 | return sprintf(buf, "%s\n", batostr(&hdev->bdaddr)); |
240 | } |
241 | |
242 | static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf) |
243 | { |
244 | struct hci_dev *hdev = dev_get_drvdata(dev); |
245 | |
246 | return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", |
247 | hdev->features[0], hdev->features[1], |
248 | hdev->features[2], hdev->features[3], |
249 | hdev->features[4], hdev->features[5], |
250 | hdev->features[6], hdev->features[7]); |
251 | } |
252 | |
253 | static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf) |
254 | { |
255 | struct hci_dev *hdev = dev_get_drvdata(dev); |
256 | return sprintf(buf, "%d\n", hdev->manufacturer); |
257 | } |
258 | |
259 | static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf) |
260 | { |
261 | struct hci_dev *hdev = dev_get_drvdata(dev); |
262 | return sprintf(buf, "%d\n", hdev->hci_ver); |
263 | } |
264 | |
265 | static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf) |
266 | { |
267 | struct hci_dev *hdev = dev_get_drvdata(dev); |
268 | return sprintf(buf, "%d\n", hdev->hci_rev); |
269 | } |
270 | |
271 | static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf) |
272 | { |
273 | struct hci_dev *hdev = dev_get_drvdata(dev); |
274 | return sprintf(buf, "%d\n", hdev->idle_timeout); |
275 | } |
276 | |
277 | static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
278 | { |
279 | struct hci_dev *hdev = dev_get_drvdata(dev); |
280 | unsigned long val; |
281 | |
282 | if (strict_strtoul(buf, 0, &val) < 0) |
283 | return -EINVAL; |
284 | |
285 | if (val != 0 && (val < 500 || val > 3600000)) |
286 | return -EINVAL; |
287 | |
288 | hdev->idle_timeout = val; |
289 | |
290 | return count; |
291 | } |
292 | |
293 | static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf) |
294 | { |
295 | struct hci_dev *hdev = dev_get_drvdata(dev); |
296 | return sprintf(buf, "%d\n", hdev->sniff_max_interval); |
297 | } |
298 | |
299 | static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
300 | { |
301 | struct hci_dev *hdev = dev_get_drvdata(dev); |
302 | unsigned long val; |
303 | |
304 | if (strict_strtoul(buf, 0, &val) < 0) |
305 | return -EINVAL; |
306 | |
307 | if (val < 0x0002 || val > 0xFFFE || val % 2) |
308 | return -EINVAL; |
309 | |
310 | if (val < hdev->sniff_min_interval) |
311 | return -EINVAL; |
312 | |
313 | hdev->sniff_max_interval = val; |
314 | |
315 | return count; |
316 | } |
317 | |
318 | static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf) |
319 | { |
320 | struct hci_dev *hdev = dev_get_drvdata(dev); |
321 | return sprintf(buf, "%d\n", hdev->sniff_min_interval); |
322 | } |
323 | |
324 | static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
325 | { |
326 | struct hci_dev *hdev = dev_get_drvdata(dev); |
327 | unsigned long val; |
328 | |
329 | if (strict_strtoul(buf, 0, &val) < 0) |
330 | return -EINVAL; |
331 | |
332 | if (val < 0x0002 || val > 0xFFFE || val % 2) |
333 | return -EINVAL; |
334 | |
335 | if (val > hdev->sniff_max_interval) |
336 | return -EINVAL; |
337 | |
338 | hdev->sniff_min_interval = val; |
339 | |
340 | return count; |
341 | } |
342 | |
343 | static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL); |
344 | static DEVICE_ATTR(type, S_IRUGO, show_type, NULL); |
345 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); |
346 | static DEVICE_ATTR(class, S_IRUGO, show_class, NULL); |
347 | static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); |
348 | static DEVICE_ATTR(features, S_IRUGO, show_features, NULL); |
349 | static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL); |
350 | static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL); |
351 | static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL); |
352 | |
353 | static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR, |
354 | show_idle_timeout, store_idle_timeout); |
355 | static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR, |
356 | show_sniff_max_interval, store_sniff_max_interval); |
357 | static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR, |
358 | show_sniff_min_interval, store_sniff_min_interval); |
359 | |
360 | static struct attribute *bt_host_attrs[] = { |
361 | &dev_attr_bus.attr, |
362 | &dev_attr_type.attr, |
363 | &dev_attr_name.attr, |
364 | &dev_attr_class.attr, |
365 | &dev_attr_address.attr, |
366 | &dev_attr_features.attr, |
367 | &dev_attr_manufacturer.attr, |
368 | &dev_attr_hci_version.attr, |
369 | &dev_attr_hci_revision.attr, |
370 | &dev_attr_idle_timeout.attr, |
371 | &dev_attr_sniff_max_interval.attr, |
372 | &dev_attr_sniff_min_interval.attr, |
373 | NULL |
374 | }; |
375 | |
376 | static struct attribute_group bt_host_group = { |
377 | .attrs = bt_host_attrs, |
378 | }; |
379 | |
380 | static const struct attribute_group *bt_host_groups[] = { |
381 | &bt_host_group, |
382 | NULL |
383 | }; |
384 | |
385 | static void bt_host_release(struct device *dev) |
386 | { |
387 | void *data = dev_get_drvdata(dev); |
388 | kfree(data); |
389 | } |
390 | |
391 | static struct device_type bt_host = { |
392 | .name = "host", |
393 | .groups = bt_host_groups, |
394 | .release = bt_host_release, |
395 | }; |
396 | |
397 | static int inquiry_cache_show(struct seq_file *f, void *p) |
398 | { |
399 | struct hci_dev *hdev = f->private; |
400 | struct inquiry_cache *cache = &hdev->inq_cache; |
401 | struct inquiry_entry *e; |
402 | |
403 | hci_dev_lock_bh(hdev); |
404 | |
405 | for (e = cache->list; e; e = e->next) { |
406 | struct inquiry_data *data = &e->data; |
407 | seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n", |
408 | batostr(&data->bdaddr), |
409 | data->pscan_rep_mode, data->pscan_period_mode, |
410 | data->pscan_mode, data->dev_class[2], |
411 | data->dev_class[1], data->dev_class[0], |
412 | __le16_to_cpu(data->clock_offset), |
413 | data->rssi, data->ssp_mode, e->timestamp); |
414 | } |
415 | |
416 | hci_dev_unlock_bh(hdev); |
417 | |
418 | return 0; |
419 | } |
420 | |
421 | static int inquiry_cache_open(struct inode *inode, struct file *file) |
422 | { |
423 | return single_open(file, inquiry_cache_show, inode->i_private); |
424 | } |
425 | |
426 | static const struct file_operations inquiry_cache_fops = { |
427 | .open = inquiry_cache_open, |
428 | .read = seq_read, |
429 | .llseek = seq_lseek, |
430 | .release = single_release, |
431 | }; |
432 | |
433 | static int blacklist_show(struct seq_file *f, void *p) |
434 | { |
435 | struct hci_dev *hdev = f->private; |
436 | struct list_head *l; |
437 | |
438 | hci_dev_lock_bh(hdev); |
439 | |
440 | list_for_each(l, &hdev->blacklist) { |
441 | struct bdaddr_list *b; |
442 | |
443 | b = list_entry(l, struct bdaddr_list, list); |
444 | |
445 | seq_printf(f, "%s\n", batostr(&b->bdaddr)); |
446 | } |
447 | |
448 | hci_dev_unlock_bh(hdev); |
449 | |
450 | return 0; |
451 | } |
452 | |
453 | static int blacklist_open(struct inode *inode, struct file *file) |
454 | { |
455 | return single_open(file, blacklist_show, inode->i_private); |
456 | } |
457 | |
458 | static const struct file_operations blacklist_fops = { |
459 | .open = blacklist_open, |
460 | .read = seq_read, |
461 | .llseek = seq_lseek, |
462 | .release = single_release, |
463 | }; |
464 | int hci_register_sysfs(struct hci_dev *hdev) |
465 | { |
466 | struct device *dev = &hdev->dev; |
467 | int err; |
468 | |
469 | BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
470 | |
471 | dev->type = &bt_host; |
472 | dev->class = bt_class; |
473 | dev->parent = hdev->parent; |
474 | |
475 | dev_set_name(dev, "%s", hdev->name); |
476 | |
477 | dev_set_drvdata(dev, hdev); |
478 | |
479 | err = device_register(dev); |
480 | if (err < 0) |
481 | return err; |
482 | |
483 | if (!bt_debugfs) |
484 | return 0; |
485 | |
486 | hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs); |
487 | if (!hdev->debugfs) |
488 | return 0; |
489 | |
490 | debugfs_create_file("inquiry_cache", 0444, hdev->debugfs, |
491 | hdev, &inquiry_cache_fops); |
492 | |
493 | debugfs_create_file("blacklist", 0444, hdev->debugfs, |
494 | hdev, &blacklist_fops); |
495 | |
496 | return 0; |
497 | } |
498 | |
499 | void hci_unregister_sysfs(struct hci_dev *hdev) |
500 | { |
501 | BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
502 | |
503 | debugfs_remove_recursive(hdev->debugfs); |
504 | |
505 | device_del(&hdev->dev); |
506 | } |
507 | |
508 | int __init bt_sysfs_init(void) |
509 | { |
510 | bt_debugfs = debugfs_create_dir("bluetooth", NULL); |
511 | |
512 | bt_class = class_create(THIS_MODULE, "bluetooth"); |
513 | if (IS_ERR(bt_class)) |
514 | return PTR_ERR(bt_class); |
515 | |
516 | return 0; |
517 | } |
518 | |
519 | void bt_sysfs_cleanup(void) |
520 | { |
521 | class_destroy(bt_class); |
522 | |
523 | debugfs_remove_recursive(bt_debugfs); |
524 | } |
525 |
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