a05d45eb3ba115c16447e108b2781645e4fa85d3
[pandora-kernel.git] / net / bluetooth / hci_sysfs.c
1 /* Bluetooth HCI driver model support. */
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 struct class *bt_class = NULL;
10 EXPORT_SYMBOL_GPL(bt_class);
11
12 static struct workqueue_struct *bt_workq;
13
14 static inline char *link_typetostr(int type)
15 {
16         switch (type) {
17         case ACL_LINK:
18                 return "ACL";
19         case SCO_LINK:
20                 return "SCO";
21         case ESCO_LINK:
22                 return "eSCO";
23         default:
24                 return "UNKNOWN";
25         }
26 }
27
28 static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf)
29 {
30         struct hci_conn *conn = dev_get_drvdata(dev);
31         return sprintf(buf, "%s\n", link_typetostr(conn->type));
32 }
33
34 static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf)
35 {
36         struct hci_conn *conn = dev_get_drvdata(dev);
37         bdaddr_t bdaddr;
38         baswap(&bdaddr, &conn->dst);
39         return sprintf(buf, "%s\n", batostr(&bdaddr));
40 }
41
42 static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf)
43 {
44         struct hci_conn *conn = dev_get_drvdata(dev);
45
46         return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
47                                 conn->features[0], conn->features[1],
48                                 conn->features[2], conn->features[3],
49                                 conn->features[4], conn->features[5],
50                                 conn->features[6], conn->features[7]);
51 }
52
53 #define LINK_ATTR(_name,_mode,_show,_store) \
54 struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store)
55
56 static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
57 static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
58 static LINK_ATTR(features, S_IRUGO, show_link_features, NULL);
59
60 static struct attribute *bt_link_attrs[] = {
61         &link_attr_type.attr,
62         &link_attr_address.attr,
63         &link_attr_features.attr,
64         NULL
65 };
66
67 static struct attribute_group bt_link_group = {
68         .attrs = bt_link_attrs,
69 };
70
71 static struct attribute_group *bt_link_groups[] = {
72         &bt_link_group,
73         NULL
74 };
75
76 static void bt_link_release(struct device *dev)
77 {
78         void *data = dev_get_drvdata(dev);
79         kfree(data);
80 }
81
82 static struct device_type bt_link = {
83         .name    = "link",
84         .groups  = bt_link_groups,
85         .release = bt_link_release,
86 };
87
88 static void add_conn(struct work_struct *work)
89 {
90         struct hci_conn *conn = container_of(work, struct hci_conn, work_add);
91         struct hci_dev *hdev = conn->hdev;
92
93         /* ensure previous del is complete */
94         flush_work(&conn->work_del);
95
96         dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
97
98         if (device_add(&conn->dev) < 0) {
99                 BT_ERR("Failed to register connection device");
100                 return;
101         }
102 }
103
104 /*
105  * The rfcomm tty device will possibly retain even when conn
106  * is down, and sysfs doesn't support move zombie device,
107  * so we should move the device before conn device is destroyed.
108  */
109 static int __match_tty(struct device *dev, void *data)
110 {
111         return !strncmp(dev_name(dev), "rfcomm", 6);
112 }
113
114 static void del_conn(struct work_struct *work)
115 {
116         struct hci_conn *conn = container_of(work, struct hci_conn, work_del);
117         struct hci_dev *hdev = conn->hdev;
118
119         /* ensure previous add is complete */
120         flush_work(&conn->work_add);
121
122         if (!device_is_registered(&conn->dev))
123                 return;
124
125         while (1) {
126                 struct device *dev;
127
128                 dev = device_find_child(&conn->dev, NULL, __match_tty);
129                 if (!dev)
130                         break;
131                 device_move(dev, NULL, DPM_ORDER_DEV_LAST);
132                 put_device(dev);
133         }
134
135         device_del(&conn->dev);
136         put_device(&conn->dev);
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         dev_set_drvdata(&conn->dev, conn);
151
152         device_initialize(&conn->dev);
153
154         INIT_WORK(&conn->work_add, add_conn);
155         INIT_WORK(&conn->work_del, del_conn);
156 }
157
158 void hci_conn_add_sysfs(struct hci_conn *conn)
159 {
160         BT_DBG("conn %p", conn);
161
162         queue_work(bt_workq, &conn->work_add);
163 }
164
165 void hci_conn_del_sysfs(struct hci_conn *conn)
166 {
167         BT_DBG("conn %p", conn);
168
169         queue_work(bt_workq, &conn->work_del);
170 }
171
172 static inline char *host_typetostr(int type)
173 {
174         switch (type) {
175         case HCI_VIRTUAL:
176                 return "VIRTUAL";
177         case HCI_USB:
178                 return "USB";
179         case HCI_PCCARD:
180                 return "PCCARD";
181         case HCI_UART:
182                 return "UART";
183         case HCI_RS232:
184                 return "RS232";
185         case HCI_PCI:
186                 return "PCI";
187         case HCI_SDIO:
188                 return "SDIO";
189         default:
190                 return "UNKNOWN";
191         }
192 }
193
194 static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
195 {
196         struct hci_dev *hdev = dev_get_drvdata(dev);
197         return sprintf(buf, "%s\n", host_typetostr(hdev->type));
198 }
199
200 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
201 {
202         struct hci_dev *hdev = dev_get_drvdata(dev);
203         char name[249];
204         int i;
205
206         for (i = 0; i < 248; i++)
207                 name[i] = hdev->dev_name[i];
208
209         name[248] = '\0';
210         return sprintf(buf, "%s\n", name);
211 }
212
213 static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
214 {
215         struct hci_dev *hdev = dev_get_drvdata(dev);
216         return sprintf(buf, "0x%.2x%.2x%.2x\n",
217                         hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
218 }
219
220 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
221 {
222         struct hci_dev *hdev = dev_get_drvdata(dev);
223         bdaddr_t bdaddr;
224         baswap(&bdaddr, &hdev->bdaddr);
225         return sprintf(buf, "%s\n", batostr(&bdaddr));
226 }
227
228 static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
229 {
230         struct hci_dev *hdev = dev_get_drvdata(dev);
231
232         return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
233                                 hdev->features[0], hdev->features[1],
234                                 hdev->features[2], hdev->features[3],
235                                 hdev->features[4], hdev->features[5],
236                                 hdev->features[6], hdev->features[7]);
237 }
238
239 static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
240 {
241         struct hci_dev *hdev = dev_get_drvdata(dev);
242         return sprintf(buf, "%d\n", hdev->manufacturer);
243 }
244
245 static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf)
246 {
247         struct hci_dev *hdev = dev_get_drvdata(dev);
248         return sprintf(buf, "%d\n", hdev->hci_ver);
249 }
250
251 static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf)
252 {
253         struct hci_dev *hdev = dev_get_drvdata(dev);
254         return sprintf(buf, "%d\n", hdev->hci_rev);
255 }
256
257 static ssize_t show_inquiry_cache(struct device *dev, struct device_attribute *attr, char *buf)
258 {
259         struct hci_dev *hdev = dev_get_drvdata(dev);
260         struct inquiry_cache *cache = &hdev->inq_cache;
261         struct inquiry_entry *e;
262         int n = 0;
263
264         hci_dev_lock_bh(hdev);
265
266         for (e = cache->list; e; e = e->next) {
267                 struct inquiry_data *data = &e->data;
268                 bdaddr_t bdaddr;
269                 baswap(&bdaddr, &data->bdaddr);
270                 n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
271                                 batostr(&bdaddr),
272                                 data->pscan_rep_mode, data->pscan_period_mode,
273                                 data->pscan_mode, data->dev_class[2],
274                                 data->dev_class[1], data->dev_class[0],
275                                 __le16_to_cpu(data->clock_offset),
276                                 data->rssi, data->ssp_mode, e->timestamp);
277         }
278
279         hci_dev_unlock_bh(hdev);
280         return n;
281 }
282
283 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
284 {
285         struct hci_dev *hdev = dev_get_drvdata(dev);
286         return sprintf(buf, "%d\n", hdev->idle_timeout);
287 }
288
289 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
290 {
291         struct hci_dev *hdev = dev_get_drvdata(dev);
292         char *ptr;
293         __u32 val;
294
295         val = simple_strtoul(buf, &ptr, 10);
296         if (ptr == buf)
297                 return -EINVAL;
298
299         if (val != 0 && (val < 500 || val > 3600000))
300                 return -EINVAL;
301
302         hdev->idle_timeout = val;
303
304         return count;
305 }
306
307 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
308 {
309         struct hci_dev *hdev = dev_get_drvdata(dev);
310         return sprintf(buf, "%d\n", hdev->sniff_max_interval);
311 }
312
313 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
314 {
315         struct hci_dev *hdev = dev_get_drvdata(dev);
316         char *ptr;
317         __u16 val;
318
319         val = simple_strtoul(buf, &ptr, 10);
320         if (ptr == buf)
321                 return -EINVAL;
322
323         if (val < 0x0002 || val > 0xFFFE || val % 2)
324                 return -EINVAL;
325
326         if (val < hdev->sniff_min_interval)
327                 return -EINVAL;
328
329         hdev->sniff_max_interval = val;
330
331         return count;
332 }
333
334 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
335 {
336         struct hci_dev *hdev = dev_get_drvdata(dev);
337         return sprintf(buf, "%d\n", hdev->sniff_min_interval);
338 }
339
340 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
341 {
342         struct hci_dev *hdev = dev_get_drvdata(dev);
343         char *ptr;
344         __u16 val;
345
346         val = simple_strtoul(buf, &ptr, 10);
347         if (ptr == buf)
348                 return -EINVAL;
349
350         if (val < 0x0002 || val > 0xFFFE || val % 2)
351                 return -EINVAL;
352
353         if (val > hdev->sniff_max_interval)
354                 return -EINVAL;
355
356         hdev->sniff_min_interval = val;
357
358         return count;
359 }
360
361 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
362 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
363 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
364 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
365 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
366 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
367 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
368 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
369 static DEVICE_ATTR(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL);
370
371 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
372                                 show_idle_timeout, store_idle_timeout);
373 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
374                                 show_sniff_max_interval, store_sniff_max_interval);
375 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
376                                 show_sniff_min_interval, store_sniff_min_interval);
377
378 static struct attribute *bt_host_attrs[] = {
379         &dev_attr_type.attr,
380         &dev_attr_name.attr,
381         &dev_attr_class.attr,
382         &dev_attr_address.attr,
383         &dev_attr_features.attr,
384         &dev_attr_manufacturer.attr,
385         &dev_attr_hci_version.attr,
386         &dev_attr_hci_revision.attr,
387         &dev_attr_inquiry_cache.attr,
388         &dev_attr_idle_timeout.attr,
389         &dev_attr_sniff_max_interval.attr,
390         &dev_attr_sniff_min_interval.attr,
391         NULL
392 };
393
394 static struct attribute_group bt_host_group = {
395         .attrs = bt_host_attrs,
396 };
397
398 static struct attribute_group *bt_host_groups[] = {
399         &bt_host_group,
400         NULL
401 };
402
403 static void bt_host_release(struct device *dev)
404 {
405         void *data = dev_get_drvdata(dev);
406         kfree(data);
407 }
408
409 static struct device_type bt_host = {
410         .name    = "host",
411         .groups  = bt_host_groups,
412         .release = bt_host_release,
413 };
414
415 int hci_register_sysfs(struct hci_dev *hdev)
416 {
417         struct device *dev = &hdev->dev;
418         int err;
419
420         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
421
422         dev->type = &bt_host;
423         dev->class = bt_class;
424         dev->parent = hdev->parent;
425
426         dev_set_name(dev, "%s", hdev->name);
427
428         dev_set_drvdata(dev, hdev);
429
430         err = device_register(dev);
431         if (err < 0)
432                 return err;
433
434         return 0;
435 }
436
437 void hci_unregister_sysfs(struct hci_dev *hdev)
438 {
439         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
440
441         device_del(&hdev->dev);
442 }
443
444 int __init bt_sysfs_init(void)
445 {
446         bt_workq = create_singlethread_workqueue("bluetooth");
447         if (!bt_workq)
448                 return -ENOMEM;
449
450         bt_class = class_create(THIS_MODULE, "bluetooth");
451         if (IS_ERR(bt_class)) {
452                 destroy_workqueue(bt_workq);
453                 return PTR_ERR(bt_class);
454         }
455
456         return 0;
457 }
458
459 void bt_sysfs_cleanup(void)
460 {
461         destroy_workqueue(bt_workq);
462
463         class_destroy(bt_class);
464 }