Bluetooth: Use strict_strtoul instead of simple_strtoul
[pandora-kernel.git] / net / bluetooth / hci_sysfs.c
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         bdaddr_t bdaddr;
41         baswap(&bdaddr, &conn->dst);
42         return sprintf(buf, "%s\n", batostr(&bdaddr));
43 }
44
45 static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf)
46 {
47         struct hci_conn *conn = dev_get_drvdata(dev);
48
49         return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
50                                 conn->features[0], conn->features[1],
51                                 conn->features[2], conn->features[3],
52                                 conn->features[4], conn->features[5],
53                                 conn->features[6], conn->features[7]);
54 }
55
56 #define LINK_ATTR(_name,_mode,_show,_store) \
57 struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store)
58
59 static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
60 static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
61 static LINK_ATTR(features, S_IRUGO, show_link_features, NULL);
62
63 static struct attribute *bt_link_attrs[] = {
64         &link_attr_type.attr,
65         &link_attr_address.attr,
66         &link_attr_features.attr,
67         NULL
68 };
69
70 static struct attribute_group bt_link_group = {
71         .attrs = bt_link_attrs,
72 };
73
74 static const struct attribute_group *bt_link_groups[] = {
75         &bt_link_group,
76         NULL
77 };
78
79 static void bt_link_release(struct device *dev)
80 {
81         void *data = dev_get_drvdata(dev);
82         kfree(data);
83 }
84
85 static struct device_type bt_link = {
86         .name    = "link",
87         .groups  = bt_link_groups,
88         .release = bt_link_release,
89 };
90
91 static void add_conn(struct work_struct *work)
92 {
93         struct hci_conn *conn = container_of(work, struct hci_conn, work_add);
94         struct hci_dev *hdev = conn->hdev;
95
96         dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
97
98         dev_set_drvdata(&conn->dev, conn);
99
100         if (device_add(&conn->dev) < 0) {
101                 BT_ERR("Failed to register connection device");
102                 return;
103         }
104
105         hci_dev_hold(hdev);
106 }
107
108 /*
109  * The rfcomm tty device will possibly retain even when conn
110  * is down, and sysfs doesn't support move zombie device,
111  * so we should move the device before conn device is destroyed.
112  */
113 static int __match_tty(struct device *dev, void *data)
114 {
115         return !strncmp(dev_name(dev), "rfcomm", 6);
116 }
117
118 static void del_conn(struct work_struct *work)
119 {
120         struct hci_conn *conn = container_of(work, struct hci_conn, work_del);
121         struct hci_dev *hdev = conn->hdev;
122
123         if (!device_is_registered(&conn->dev))
124                 return;
125
126         while (1) {
127                 struct device *dev;
128
129                 dev = device_find_child(&conn->dev, NULL, __match_tty);
130                 if (!dev)
131                         break;
132                 device_move(dev, NULL, DPM_ORDER_DEV_LAST);
133                 put_device(dev);
134         }
135
136         device_del(&conn->dev);
137         put_device(&conn->dev);
138
139         hci_dev_put(hdev);
140 }
141
142 void hci_conn_init_sysfs(struct hci_conn *conn)
143 {
144         struct hci_dev *hdev = conn->hdev;
145
146         BT_DBG("conn %p", conn);
147
148         conn->dev.type = &bt_link;
149         conn->dev.class = bt_class;
150         conn->dev.parent = &hdev->dev;
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(conn->hdev->workqueue, &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(conn->hdev->workqueue, &conn->work_del);
170 }
171
172 static inline char *host_bustostr(int bus)
173 {
174         switch (bus) {
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 inline char *host_typetostr(int type)
195 {
196         switch (type) {
197         case HCI_BREDR:
198                 return "BR/EDR";
199         case HCI_80211:
200                 return "802.11";
201         default:
202                 return "UNKNOWN";
203         }
204 }
205
206 static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf)
207 {
208         struct hci_dev *hdev = dev_get_drvdata(dev);
209         return sprintf(buf, "%s\n", host_bustostr(hdev->bus));
210 }
211
212 static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
213 {
214         struct hci_dev *hdev = dev_get_drvdata(dev);
215         return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
216 }
217
218 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
219 {
220         struct hci_dev *hdev = dev_get_drvdata(dev);
221         char name[249];
222         int i;
223
224         for (i = 0; i < 248; i++)
225                 name[i] = hdev->dev_name[i];
226
227         name[248] = '\0';
228         return sprintf(buf, "%s\n", name);
229 }
230
231 static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
232 {
233         struct hci_dev *hdev = dev_get_drvdata(dev);
234         return sprintf(buf, "0x%.2x%.2x%.2x\n",
235                         hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
236 }
237
238 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
239 {
240         struct hci_dev *hdev = dev_get_drvdata(dev);
241         bdaddr_t bdaddr;
242         baswap(&bdaddr, &hdev->bdaddr);
243         return sprintf(buf, "%s\n", batostr(&bdaddr));
244 }
245
246 static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
247 {
248         struct hci_dev *hdev = dev_get_drvdata(dev);
249
250         return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
251                                 hdev->features[0], hdev->features[1],
252                                 hdev->features[2], hdev->features[3],
253                                 hdev->features[4], hdev->features[5],
254                                 hdev->features[6], hdev->features[7]);
255 }
256
257 static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
258 {
259         struct hci_dev *hdev = dev_get_drvdata(dev);
260         return sprintf(buf, "%d\n", hdev->manufacturer);
261 }
262
263 static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf)
264 {
265         struct hci_dev *hdev = dev_get_drvdata(dev);
266         return sprintf(buf, "%d\n", hdev->hci_ver);
267 }
268
269 static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf)
270 {
271         struct hci_dev *hdev = dev_get_drvdata(dev);
272         return sprintf(buf, "%d\n", hdev->hci_rev);
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         unsigned long val;
285
286         if (strict_strtoul(buf, 0, &val) < 0)
287                 return -EINVAL;
288
289         if (val != 0 && (val < 500 || val > 3600000))
290                 return -EINVAL;
291
292         hdev->idle_timeout = val;
293
294         return count;
295 }
296
297 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
298 {
299         struct hci_dev *hdev = dev_get_drvdata(dev);
300         return sprintf(buf, "%d\n", hdev->sniff_max_interval);
301 }
302
303 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
304 {
305         struct hci_dev *hdev = dev_get_drvdata(dev);
306         unsigned long val;
307
308         if (strict_strtoul(buf, 0, &val) < 0)
309                 return -EINVAL;
310
311         if (val < 0x0002 || val > 0xFFFE || val % 2)
312                 return -EINVAL;
313
314         if (val < hdev->sniff_min_interval)
315                 return -EINVAL;
316
317         hdev->sniff_max_interval = val;
318
319         return count;
320 }
321
322 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
323 {
324         struct hci_dev *hdev = dev_get_drvdata(dev);
325         return sprintf(buf, "%d\n", hdev->sniff_min_interval);
326 }
327
328 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
329 {
330         struct hci_dev *hdev = dev_get_drvdata(dev);
331         unsigned long val;
332
333         if (strict_strtoul(buf, 0, &val) < 0)
334                 return -EINVAL;
335
336         if (val < 0x0002 || val > 0xFFFE || val % 2)
337                 return -EINVAL;
338
339         if (val > hdev->sniff_max_interval)
340                 return -EINVAL;
341
342         hdev->sniff_min_interval = val;
343
344         return count;
345 }
346
347 static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL);
348 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
349 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
350 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
351 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
352 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
353 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
354 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
355 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
356
357 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
358                                 show_idle_timeout, store_idle_timeout);
359 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
360                                 show_sniff_max_interval, store_sniff_max_interval);
361 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
362                                 show_sniff_min_interval, store_sniff_min_interval);
363
364 static struct attribute *bt_host_attrs[] = {
365         &dev_attr_bus.attr,
366         &dev_attr_type.attr,
367         &dev_attr_name.attr,
368         &dev_attr_class.attr,
369         &dev_attr_address.attr,
370         &dev_attr_features.attr,
371         &dev_attr_manufacturer.attr,
372         &dev_attr_hci_version.attr,
373         &dev_attr_hci_revision.attr,
374         &dev_attr_idle_timeout.attr,
375         &dev_attr_sniff_max_interval.attr,
376         &dev_attr_sniff_min_interval.attr,
377         NULL
378 };
379
380 static struct attribute_group bt_host_group = {
381         .attrs = bt_host_attrs,
382 };
383
384 static const struct attribute_group *bt_host_groups[] = {
385         &bt_host_group,
386         NULL
387 };
388
389 static void bt_host_release(struct device *dev)
390 {
391         void *data = dev_get_drvdata(dev);
392         kfree(data);
393 }
394
395 static struct device_type bt_host = {
396         .name    = "host",
397         .groups  = bt_host_groups,
398         .release = bt_host_release,
399 };
400
401 static int inquiry_cache_show(struct seq_file *f, void *p)
402 {
403         struct hci_dev *hdev = f->private;
404         struct inquiry_cache *cache = &hdev->inq_cache;
405         struct inquiry_entry *e;
406
407         hci_dev_lock_bh(hdev);
408
409         for (e = cache->list; e; e = e->next) {
410                 struct inquiry_data *data = &e->data;
411                 bdaddr_t bdaddr;
412                 baswap(&bdaddr, &data->bdaddr);
413                 seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
414                            batostr(&bdaddr),
415                            data->pscan_rep_mode, data->pscan_period_mode,
416                            data->pscan_mode, data->dev_class[2],
417                            data->dev_class[1], data->dev_class[0],
418                            __le16_to_cpu(data->clock_offset),
419                            data->rssi, data->ssp_mode, e->timestamp);
420         }
421
422         hci_dev_unlock_bh(hdev);
423
424         return 0;
425 }
426
427 static int inquiry_cache_open(struct inode *inode, struct file *file)
428 {
429         return single_open(file, inquiry_cache_show, inode->i_private);
430 }
431
432 static const struct file_operations inquiry_cache_fops = {
433         .open           = inquiry_cache_open,
434         .read           = seq_read,
435         .llseek         = seq_lseek,
436         .release        = single_release,
437 };
438
439 int hci_register_sysfs(struct hci_dev *hdev)
440 {
441         struct device *dev = &hdev->dev;
442         int err;
443
444         BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
445
446         dev->type = &bt_host;
447         dev->class = bt_class;
448         dev->parent = hdev->parent;
449
450         dev_set_name(dev, "%s", hdev->name);
451
452         dev_set_drvdata(dev, hdev);
453
454         err = device_register(dev);
455         if (err < 0)
456                 return err;
457
458         if (!bt_debugfs)
459                 return 0;
460
461         hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
462         if (!hdev->debugfs)
463                 return 0;
464
465         debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
466                                                 hdev, &inquiry_cache_fops);
467
468         return 0;
469 }
470
471 void hci_unregister_sysfs(struct hci_dev *hdev)
472 {
473         BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
474
475         debugfs_remove_recursive(hdev->debugfs);
476
477         device_del(&hdev->dev);
478 }
479
480 int __init bt_sysfs_init(void)
481 {
482         bt_debugfs = debugfs_create_dir("bluetooth", NULL);
483
484         bt_class = class_create(THIS_MODULE, "bluetooth");
485         if (IS_ERR(bt_class))
486                 return PTR_ERR(bt_class);
487
488         return 0;
489 }
490
491 void bt_sysfs_cleanup(void)
492 {
493         class_destroy(bt_class);
494
495         debugfs_remove_recursive(bt_debugfs);
496 }