Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6] / 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 *btaddconn;
13 static struct workqueue_struct *btdelconn;
14
15 static inline char *link_typetostr(int type)
16 {
17         switch (type) {
18         case ACL_LINK:
19                 return "ACL";
20         case SCO_LINK:
21                 return "SCO";
22         case ESCO_LINK:
23                 return "eSCO";
24         default:
25                 return "UNKNOWN";
26         }
27 }
28
29 static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf)
30 {
31         struct hci_conn *conn = dev_get_drvdata(dev);
32         return sprintf(buf, "%s\n", link_typetostr(conn->type));
33 }
34
35 static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf)
36 {
37         struct hci_conn *conn = dev_get_drvdata(dev);
38         bdaddr_t bdaddr;
39         baswap(&bdaddr, &conn->dst);
40         return sprintf(buf, "%s\n", batostr(&bdaddr));
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 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);
92
93         flush_workqueue(btdelconn);
94
95         if (device_add(&conn->dev) < 0) {
96                 BT_ERR("Failed to register connection device");
97                 return;
98         }
99 }
100
101 void hci_conn_add_sysfs(struct hci_conn *conn)
102 {
103         struct hci_dev *hdev = conn->hdev;
104
105         BT_DBG("conn %p", conn);
106
107         conn->dev.type = &bt_link;
108         conn->dev.class = bt_class;
109         conn->dev.parent = &hdev->dev;
110
111         dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
112
113         dev_set_drvdata(&conn->dev, conn);
114
115         device_initialize(&conn->dev);
116
117         INIT_WORK(&conn->work, add_conn);
118
119         queue_work(btaddconn, &conn->work);
120 }
121
122 /*
123  * The rfcomm tty device will possibly retain even when conn
124  * is down, and sysfs doesn't support move zombie device,
125  * so we should move the device before conn device is destroyed.
126  */
127 static int __match_tty(struct device *dev, void *data)
128 {
129         return !strncmp(dev_name(dev), "rfcomm", 6);
130 }
131
132 static void del_conn(struct work_struct *work)
133 {
134         struct hci_conn *conn = container_of(work, struct hci_conn, work);
135         struct hci_dev *hdev = conn->hdev;
136
137         while (1) {
138                 struct device *dev;
139
140                 dev = device_find_child(&conn->dev, NULL, __match_tty);
141                 if (!dev)
142                         break;
143                 device_move(dev, NULL);
144                 put_device(dev);
145         }
146
147         device_del(&conn->dev);
148         put_device(&conn->dev);
149         hci_dev_put(hdev);
150 }
151
152 void hci_conn_del_sysfs(struct hci_conn *conn)
153 {
154         BT_DBG("conn %p", conn);
155
156         if (!device_is_registered(&conn->dev))
157                 return;
158
159         INIT_WORK(&conn->work, del_conn);
160
161         queue_work(btdelconn, &conn->work);
162 }
163
164 static inline char *host_typetostr(int type)
165 {
166         switch (type) {
167         case HCI_VIRTUAL:
168                 return "VIRTUAL";
169         case HCI_USB:
170                 return "USB";
171         case HCI_PCCARD:
172                 return "PCCARD";
173         case HCI_UART:
174                 return "UART";
175         case HCI_RS232:
176                 return "RS232";
177         case HCI_PCI:
178                 return "PCI";
179         case HCI_SDIO:
180                 return "SDIO";
181         default:
182                 return "UNKNOWN";
183         }
184 }
185
186 static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
187 {
188         struct hci_dev *hdev = dev_get_drvdata(dev);
189         return sprintf(buf, "%s\n", host_typetostr(hdev->type));
190 }
191
192 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
193 {
194         struct hci_dev *hdev = dev_get_drvdata(dev);
195         char name[249];
196         int i;
197
198         for (i = 0; i < 248; i++)
199                 name[i] = hdev->dev_name[i];
200
201         name[248] = '\0';
202         return sprintf(buf, "%s\n", name);
203 }
204
205 static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
206 {
207         struct hci_dev *hdev = dev_get_drvdata(dev);
208         return sprintf(buf, "0x%.2x%.2x%.2x\n",
209                         hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
210 }
211
212 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
213 {
214         struct hci_dev *hdev = dev_get_drvdata(dev);
215         bdaddr_t bdaddr;
216         baswap(&bdaddr, &hdev->bdaddr);
217         return sprintf(buf, "%s\n", batostr(&bdaddr));
218 }
219
220 static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
221 {
222         struct hci_dev *hdev = dev_get_drvdata(dev);
223
224         return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
225                                 hdev->features[0], hdev->features[1],
226                                 hdev->features[2], hdev->features[3],
227                                 hdev->features[4], hdev->features[5],
228                                 hdev->features[6], hdev->features[7]);
229 }
230
231 static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
232 {
233         struct hci_dev *hdev = dev_get_drvdata(dev);
234         return sprintf(buf, "%d\n", hdev->manufacturer);
235 }
236
237 static ssize_t show_hci_version(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->hci_ver);
241 }
242
243 static ssize_t show_hci_revision(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_rev);
247 }
248
249 static ssize_t show_inquiry_cache(struct device *dev, struct device_attribute *attr, char *buf)
250 {
251         struct hci_dev *hdev = dev_get_drvdata(dev);
252         struct inquiry_cache *cache = &hdev->inq_cache;
253         struct inquiry_entry *e;
254         int n = 0;
255
256         hci_dev_lock_bh(hdev);
257
258         for (e = cache->list; e; e = e->next) {
259                 struct inquiry_data *data = &e->data;
260                 bdaddr_t bdaddr;
261                 baswap(&bdaddr, &data->bdaddr);
262                 n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
263                                 batostr(&bdaddr),
264                                 data->pscan_rep_mode, data->pscan_period_mode,
265                                 data->pscan_mode, data->dev_class[2],
266                                 data->dev_class[1], data->dev_class[0],
267                                 __le16_to_cpu(data->clock_offset),
268                                 data->rssi, data->ssp_mode, e->timestamp);
269         }
270
271         hci_dev_unlock_bh(hdev);
272         return n;
273 }
274
275 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
276 {
277         struct hci_dev *hdev = dev_get_drvdata(dev);
278         return sprintf(buf, "%d\n", hdev->idle_timeout);
279 }
280
281 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
282 {
283         struct hci_dev *hdev = dev_get_drvdata(dev);
284         char *ptr;
285         __u32 val;
286
287         val = simple_strtoul(buf, &ptr, 10);
288         if (ptr == buf)
289                 return -EINVAL;
290
291         if (val != 0 && (val < 500 || val > 3600000))
292                 return -EINVAL;
293
294         hdev->idle_timeout = val;
295
296         return count;
297 }
298
299 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
300 {
301         struct hci_dev *hdev = dev_get_drvdata(dev);
302         return sprintf(buf, "%d\n", hdev->sniff_max_interval);
303 }
304
305 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
306 {
307         struct hci_dev *hdev = dev_get_drvdata(dev);
308         char *ptr;
309         __u16 val;
310
311         val = simple_strtoul(buf, &ptr, 10);
312         if (ptr == buf)
313                 return -EINVAL;
314
315         if (val < 0x0002 || val > 0xFFFE || val % 2)
316                 return -EINVAL;
317
318         if (val < hdev->sniff_min_interval)
319                 return -EINVAL;
320
321         hdev->sniff_max_interval = val;
322
323         return count;
324 }
325
326 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
327 {
328         struct hci_dev *hdev = dev_get_drvdata(dev);
329         return sprintf(buf, "%d\n", hdev->sniff_min_interval);
330 }
331
332 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
333 {
334         struct hci_dev *hdev = dev_get_drvdata(dev);
335         char *ptr;
336         __u16 val;
337
338         val = simple_strtoul(buf, &ptr, 10);
339         if (ptr == buf)
340                 return -EINVAL;
341
342         if (val < 0x0002 || val > 0xFFFE || val % 2)
343                 return -EINVAL;
344
345         if (val > hdev->sniff_max_interval)
346                 return -EINVAL;
347
348         hdev->sniff_min_interval = val;
349
350         return count;
351 }
352
353 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
354 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
355 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
356 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
357 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
358 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
359 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
360 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
361 static DEVICE_ATTR(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL);
362
363 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
364                                 show_idle_timeout, store_idle_timeout);
365 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
366                                 show_sniff_max_interval, store_sniff_max_interval);
367 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
368                                 show_sniff_min_interval, store_sniff_min_interval);
369
370 static struct attribute *bt_host_attrs[] = {
371         &dev_attr_type.attr,
372         &dev_attr_name.attr,
373         &dev_attr_class.attr,
374         &dev_attr_address.attr,
375         &dev_attr_features.attr,
376         &dev_attr_manufacturer.attr,
377         &dev_attr_hci_version.attr,
378         &dev_attr_hci_revision.attr,
379         &dev_attr_inquiry_cache.attr,
380         &dev_attr_idle_timeout.attr,
381         &dev_attr_sniff_max_interval.attr,
382         &dev_attr_sniff_min_interval.attr,
383         NULL
384 };
385
386 static struct attribute_group bt_host_group = {
387         .attrs = bt_host_attrs,
388 };
389
390 static struct attribute_group *bt_host_groups[] = {
391         &bt_host_group,
392         NULL
393 };
394
395 static void bt_host_release(struct device *dev)
396 {
397         void *data = dev_get_drvdata(dev);
398         kfree(data);
399 }
400
401 static struct device_type bt_host = {
402         .name    = "host",
403         .groups  = bt_host_groups,
404         .release = bt_host_release,
405 };
406
407 int hci_register_sysfs(struct hci_dev *hdev)
408 {
409         struct device *dev = &hdev->dev;
410         int err;
411
412         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
413
414         dev->type = &bt_host;
415         dev->class = bt_class;
416         dev->parent = hdev->parent;
417
418         dev_set_name(dev, "%s", hdev->name);
419
420         dev_set_drvdata(dev, hdev);
421
422         err = device_register(dev);
423         if (err < 0)
424                 return err;
425
426         return 0;
427 }
428
429 void hci_unregister_sysfs(struct hci_dev *hdev)
430 {
431         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
432
433         device_del(&hdev->dev);
434 }
435
436 int __init bt_sysfs_init(void)
437 {
438         btaddconn = create_singlethread_workqueue("btaddconn");
439         if (!btaddconn)
440                 return -ENOMEM;
441
442         btdelconn = create_singlethread_workqueue("btdelconn");
443         if (!btdelconn) {
444                 destroy_workqueue(btaddconn);
445                 return -ENOMEM;
446         }
447
448         bt_class = class_create(THIS_MODULE, "bluetooth");
449         if (IS_ERR(bt_class)) {
450                 destroy_workqueue(btdelconn);
451                 destroy_workqueue(btaddconn);
452                 return PTR_ERR(bt_class);
453         }
454
455         return 0;
456 }
457
458 void bt_sysfs_cleanup(void)
459 {
460         destroy_workqueue(btaddconn);
461         destroy_workqueue(btdelconn);
462
463         class_destroy(bt_class);
464 }