9b5f376813b77fa2b3734cb03ff5c91a0d5038de
[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 const 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         dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
94
95         dev_set_drvdata(&conn->dev, conn);
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
105 /*
106  * The rfcomm tty device will possibly retain even when conn
107  * is down, and sysfs doesn't support move zombie device,
108  * so we should move the device before conn device is destroyed.
109  */
110 static int __match_tty(struct device *dev, void *data)
111 {
112         return !strncmp(dev_name(dev), "rfcomm", 6);
113 }
114
115 static void del_conn(struct work_struct *work)
116 {
117         struct hci_conn *conn = container_of(work, struct hci_conn, work_del);
118         struct hci_dev *hdev = conn->hdev;
119
120         if (!device_is_registered(&conn->dev))
121                 return;
122
123         while (1) {
124                 struct device *dev;
125
126                 dev = device_find_child(&conn->dev, NULL, __match_tty);
127                 if (!dev)
128                         break;
129                 device_move(dev, NULL, DPM_ORDER_DEV_LAST);
130                 put_device(dev);
131         }
132
133         device_del(&conn->dev);
134         put_device(&conn->dev);
135
136         hci_dev_put(hdev);
137 }
138
139 void hci_conn_init_sysfs(struct hci_conn *conn)
140 {
141         struct hci_dev *hdev = conn->hdev;
142
143         BT_DBG("conn %p", conn);
144
145         conn->dev.type = &bt_link;
146         conn->dev.class = bt_class;
147         conn->dev.parent = &hdev->dev;
148
149         device_initialize(&conn->dev);
150
151         INIT_WORK(&conn->work_add, add_conn);
152         INIT_WORK(&conn->work_del, del_conn);
153 }
154
155 void hci_conn_add_sysfs(struct hci_conn *conn)
156 {
157         BT_DBG("conn %p", conn);
158
159         queue_work(bt_workq, &conn->work_add);
160 }
161
162 void hci_conn_del_sysfs(struct hci_conn *conn)
163 {
164         BT_DBG("conn %p", conn);
165
166         queue_work(bt_workq, &conn->work_del);
167 }
168
169 static inline char *host_bustostr(int bus)
170 {
171         switch (bus) {
172         case HCI_VIRTUAL:
173                 return "VIRTUAL";
174         case HCI_USB:
175                 return "USB";
176         case HCI_PCCARD:
177                 return "PCCARD";
178         case HCI_UART:
179                 return "UART";
180         case HCI_RS232:
181                 return "RS232";
182         case HCI_PCI:
183                 return "PCI";
184         case HCI_SDIO:
185                 return "SDIO";
186         default:
187                 return "UNKNOWN";
188         }
189 }
190
191 static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf)
192 {
193         struct hci_dev *hdev = dev_get_drvdata(dev);
194         return sprintf(buf, "%s\n", host_bustostr(hdev->bus));
195 }
196
197 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
198 {
199         struct hci_dev *hdev = dev_get_drvdata(dev);
200         char name[249];
201         int i;
202
203         for (i = 0; i < 248; i++)
204                 name[i] = hdev->dev_name[i];
205
206         name[248] = '\0';
207         return sprintf(buf, "%s\n", name);
208 }
209
210 static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
211 {
212         struct hci_dev *hdev = dev_get_drvdata(dev);
213         return sprintf(buf, "0x%.2x%.2x%.2x\n",
214                         hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
215 }
216
217 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
218 {
219         struct hci_dev *hdev = dev_get_drvdata(dev);
220         bdaddr_t bdaddr;
221         baswap(&bdaddr, &hdev->bdaddr);
222         return sprintf(buf, "%s\n", batostr(&bdaddr));
223 }
224
225 static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
226 {
227         struct hci_dev *hdev = dev_get_drvdata(dev);
228
229         return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
230                                 hdev->features[0], hdev->features[1],
231                                 hdev->features[2], hdev->features[3],
232                                 hdev->features[4], hdev->features[5],
233                                 hdev->features[6], hdev->features[7]);
234 }
235
236 static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
237 {
238         struct hci_dev *hdev = dev_get_drvdata(dev);
239         return sprintf(buf, "%d\n", hdev->manufacturer);
240 }
241
242 static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf)
243 {
244         struct hci_dev *hdev = dev_get_drvdata(dev);
245         return sprintf(buf, "%d\n", hdev->hci_ver);
246 }
247
248 static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf)
249 {
250         struct hci_dev *hdev = dev_get_drvdata(dev);
251         return sprintf(buf, "%d\n", hdev->hci_rev);
252 }
253
254 static ssize_t show_inquiry_cache(struct device *dev, struct device_attribute *attr, char *buf)
255 {
256         struct hci_dev *hdev = dev_get_drvdata(dev);
257         struct inquiry_cache *cache = &hdev->inq_cache;
258         struct inquiry_entry *e;
259         int n = 0;
260
261         hci_dev_lock_bh(hdev);
262
263         for (e = cache->list; e; e = e->next) {
264                 struct inquiry_data *data = &e->data;
265                 bdaddr_t bdaddr;
266                 baswap(&bdaddr, &data->bdaddr);
267                 n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
268                                 batostr(&bdaddr),
269                                 data->pscan_rep_mode, data->pscan_period_mode,
270                                 data->pscan_mode, data->dev_class[2],
271                                 data->dev_class[1], data->dev_class[0],
272                                 __le16_to_cpu(data->clock_offset),
273                                 data->rssi, data->ssp_mode, e->timestamp);
274         }
275
276         hci_dev_unlock_bh(hdev);
277         return n;
278 }
279
280 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
281 {
282         struct hci_dev *hdev = dev_get_drvdata(dev);
283         return sprintf(buf, "%d\n", hdev->idle_timeout);
284 }
285
286 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
287 {
288         struct hci_dev *hdev = dev_get_drvdata(dev);
289         char *ptr;
290         __u32 val;
291
292         val = simple_strtoul(buf, &ptr, 10);
293         if (ptr == buf)
294                 return -EINVAL;
295
296         if (val != 0 && (val < 500 || val > 3600000))
297                 return -EINVAL;
298
299         hdev->idle_timeout = val;
300
301         return count;
302 }
303
304 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
305 {
306         struct hci_dev *hdev = dev_get_drvdata(dev);
307         return sprintf(buf, "%d\n", hdev->sniff_max_interval);
308 }
309
310 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
311 {
312         struct hci_dev *hdev = dev_get_drvdata(dev);
313         char *ptr;
314         __u16 val;
315
316         val = simple_strtoul(buf, &ptr, 10);
317         if (ptr == buf)
318                 return -EINVAL;
319
320         if (val < 0x0002 || val > 0xFFFE || val % 2)
321                 return -EINVAL;
322
323         if (val < hdev->sniff_min_interval)
324                 return -EINVAL;
325
326         hdev->sniff_max_interval = val;
327
328         return count;
329 }
330
331 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
332 {
333         struct hci_dev *hdev = dev_get_drvdata(dev);
334         return sprintf(buf, "%d\n", hdev->sniff_min_interval);
335 }
336
337 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
338 {
339         struct hci_dev *hdev = dev_get_drvdata(dev);
340         char *ptr;
341         __u16 val;
342
343         val = simple_strtoul(buf, &ptr, 10);
344         if (ptr == buf)
345                 return -EINVAL;
346
347         if (val < 0x0002 || val > 0xFFFE || val % 2)
348                 return -EINVAL;
349
350         if (val > hdev->sniff_max_interval)
351                 return -EINVAL;
352
353         hdev->sniff_min_interval = val;
354
355         return count;
356 }
357
358 static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL);
359 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
360 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
361 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
362 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
363 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
364 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
365 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
366 static DEVICE_ATTR(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL);
367
368 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
369                                 show_idle_timeout, store_idle_timeout);
370 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
371                                 show_sniff_max_interval, store_sniff_max_interval);
372 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
373                                 show_sniff_min_interval, store_sniff_min_interval);
374
375 static struct attribute *bt_host_attrs[] = {
376         &dev_attr_bus.attr,
377         &dev_attr_name.attr,
378         &dev_attr_class.attr,
379         &dev_attr_address.attr,
380         &dev_attr_features.attr,
381         &dev_attr_manufacturer.attr,
382         &dev_attr_hci_version.attr,
383         &dev_attr_hci_revision.attr,
384         &dev_attr_inquiry_cache.attr,
385         &dev_attr_idle_timeout.attr,
386         &dev_attr_sniff_max_interval.attr,
387         &dev_attr_sniff_min_interval.attr,
388         NULL
389 };
390
391 static struct attribute_group bt_host_group = {
392         .attrs = bt_host_attrs,
393 };
394
395 static const struct attribute_group *bt_host_groups[] = {
396         &bt_host_group,
397         NULL
398 };
399
400 static void bt_host_release(struct device *dev)
401 {
402         void *data = dev_get_drvdata(dev);
403         kfree(data);
404 }
405
406 static struct device_type bt_host = {
407         .name    = "host",
408         .groups  = bt_host_groups,
409         .release = bt_host_release,
410 };
411
412 int hci_register_sysfs(struct hci_dev *hdev)
413 {
414         struct device *dev = &hdev->dev;
415         int err;
416
417         BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
418
419         dev->type = &bt_host;
420         dev->class = bt_class;
421         dev->parent = hdev->parent;
422
423         dev_set_name(dev, "%s", hdev->name);
424
425         dev_set_drvdata(dev, hdev);
426
427         err = device_register(dev);
428         if (err < 0)
429                 return err;
430
431         return 0;
432 }
433
434 void hci_unregister_sysfs(struct hci_dev *hdev)
435 {
436         BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
437
438         device_del(&hdev->dev);
439 }
440
441 int __init bt_sysfs_init(void)
442 {
443         bt_workq = create_singlethread_workqueue("bluetooth");
444         if (!bt_workq)
445                 return -ENOMEM;
446
447         bt_class = class_create(THIS_MODULE, "bluetooth");
448         if (IS_ERR(bt_class)) {
449                 destroy_workqueue(bt_workq);
450                 return PTR_ERR(bt_class);
451         }
452
453         return 0;
454 }
455
456 void bt_sysfs_cleanup(void)
457 {
458         destroy_workqueue(bt_workq);
459
460         class_destroy(bt_class);
461 }