[BLUETOOTH]: Move children of connection device to NULL before connection down.
[linux-2.6.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 <linux/platform_device.h>
7
8 #include <net/bluetooth/bluetooth.h>
9 #include <net/bluetooth/hci_core.h>
10
11 #ifndef CONFIG_BT_HCI_CORE_DEBUG
12 #undef  BT_DBG
13 #define BT_DBG(D...)
14 #endif
15
16 static inline char *typetostr(int type)
17 {
18         switch (type) {
19         case HCI_VIRTUAL:
20                 return "VIRTUAL";
21         case HCI_USB:
22                 return "USB";
23         case HCI_PCCARD:
24                 return "PCCARD";
25         case HCI_UART:
26                 return "UART";
27         case HCI_RS232:
28                 return "RS232";
29         case HCI_PCI:
30                 return "PCI";
31         case HCI_SDIO:
32                 return "SDIO";
33         default:
34                 return "UNKNOWN";
35         }
36 }
37
38 static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
39 {
40         struct hci_dev *hdev = dev_get_drvdata(dev);
41         return sprintf(buf, "%s\n", typetostr(hdev->type));
42 }
43
44 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
45 {
46         struct hci_dev *hdev = dev_get_drvdata(dev);
47         char name[249];
48         int i;
49
50         for (i = 0; i < 248; i++)
51                 name[i] = hdev->dev_name[i];
52
53         name[248] = '\0';
54         return sprintf(buf, "%s\n", name);
55 }
56
57 static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
58 {
59         struct hci_dev *hdev = dev_get_drvdata(dev);
60         return sprintf(buf, "0x%.2x%.2x%.2x\n",
61                         hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
62 }
63
64 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
65 {
66         struct hci_dev *hdev = dev_get_drvdata(dev);
67         bdaddr_t bdaddr;
68         baswap(&bdaddr, &hdev->bdaddr);
69         return sprintf(buf, "%s\n", batostr(&bdaddr));
70 }
71
72 static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
73 {
74         struct hci_dev *hdev = dev_get_drvdata(dev);
75
76         return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
77                                 hdev->features[0], hdev->features[1],
78                                 hdev->features[2], hdev->features[3],
79                                 hdev->features[4], hdev->features[5],
80                                 hdev->features[6], hdev->features[7]);
81 }
82
83 static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
84 {
85         struct hci_dev *hdev = dev_get_drvdata(dev);
86         return sprintf(buf, "%d\n", hdev->manufacturer);
87 }
88
89 static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf)
90 {
91         struct hci_dev *hdev = dev_get_drvdata(dev);
92         return sprintf(buf, "%d\n", hdev->hci_ver);
93 }
94
95 static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf)
96 {
97         struct hci_dev *hdev = dev_get_drvdata(dev);
98         return sprintf(buf, "%d\n", hdev->hci_rev);
99 }
100
101 static ssize_t show_inquiry_cache(struct device *dev, struct device_attribute *attr, char *buf)
102 {
103         struct hci_dev *hdev = dev_get_drvdata(dev);
104         struct inquiry_cache *cache = &hdev->inq_cache;
105         struct inquiry_entry *e;
106         int n = 0;
107
108         hci_dev_lock_bh(hdev);
109
110         for (e = cache->list; e; e = e->next) {
111                 struct inquiry_data *data = &e->data;
112                 bdaddr_t bdaddr;
113                 baswap(&bdaddr, &data->bdaddr);
114                 n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %u\n",
115                                 batostr(&bdaddr),
116                                 data->pscan_rep_mode, data->pscan_period_mode, data->pscan_mode,
117                                 data->dev_class[2], data->dev_class[1], data->dev_class[0],
118                                 __le16_to_cpu(data->clock_offset), data->rssi, e->timestamp);
119         }
120
121         hci_dev_unlock_bh(hdev);
122         return n;
123 }
124
125 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
126 {
127         struct hci_dev *hdev = dev_get_drvdata(dev);
128         return sprintf(buf, "%d\n", hdev->idle_timeout);
129 }
130
131 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
132 {
133         struct hci_dev *hdev = dev_get_drvdata(dev);
134         char *ptr;
135         __u32 val;
136
137         val = simple_strtoul(buf, &ptr, 10);
138         if (ptr == buf)
139                 return -EINVAL;
140
141         if (val != 0 && (val < 500 || val > 3600000))
142                 return -EINVAL;
143
144         hdev->idle_timeout = val;
145
146         return count;
147 }
148
149 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
150 {
151         struct hci_dev *hdev = dev_get_drvdata(dev);
152         return sprintf(buf, "%d\n", hdev->sniff_max_interval);
153 }
154
155 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
156 {
157         struct hci_dev *hdev = dev_get_drvdata(dev);
158         char *ptr;
159         __u16 val;
160
161         val = simple_strtoul(buf, &ptr, 10);
162         if (ptr == buf)
163                 return -EINVAL;
164
165         if (val < 0x0002 || val > 0xFFFE || val % 2)
166                 return -EINVAL;
167
168         if (val < hdev->sniff_min_interval)
169                 return -EINVAL;
170
171         hdev->sniff_max_interval = val;
172
173         return count;
174 }
175
176 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
177 {
178         struct hci_dev *hdev = dev_get_drvdata(dev);
179         return sprintf(buf, "%d\n", hdev->sniff_min_interval);
180 }
181
182 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
183 {
184         struct hci_dev *hdev = dev_get_drvdata(dev);
185         char *ptr;
186         __u16 val;
187
188         val = simple_strtoul(buf, &ptr, 10);
189         if (ptr == buf)
190                 return -EINVAL;
191
192         if (val < 0x0002 || val > 0xFFFE || val % 2)
193                 return -EINVAL;
194
195         if (val > hdev->sniff_max_interval)
196                 return -EINVAL;
197
198         hdev->sniff_min_interval = val;
199
200         return count;
201 }
202
203 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
204 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
205 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
206 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
207 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
208 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
209 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
210 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
211 static DEVICE_ATTR(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL);
212
213 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
214                                 show_idle_timeout, store_idle_timeout);
215 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
216                                 show_sniff_max_interval, store_sniff_max_interval);
217 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
218                                 show_sniff_min_interval, store_sniff_min_interval);
219
220 static struct device_attribute *bt_attrs[] = {
221         &dev_attr_type,
222         &dev_attr_name,
223         &dev_attr_class,
224         &dev_attr_address,
225         &dev_attr_features,
226         &dev_attr_manufacturer,
227         &dev_attr_hci_version,
228         &dev_attr_hci_revision,
229         &dev_attr_inquiry_cache,
230         &dev_attr_idle_timeout,
231         &dev_attr_sniff_max_interval,
232         &dev_attr_sniff_min_interval,
233         NULL
234 };
235
236 static ssize_t show_conn_type(struct device *dev, struct device_attribute *attr, char *buf)
237 {
238         struct hci_conn *conn = dev_get_drvdata(dev);
239         return sprintf(buf, "%s\n", conn->type == ACL_LINK ? "ACL" : "SCO");
240 }
241
242 static ssize_t show_conn_address(struct device *dev, struct device_attribute *attr, char *buf)
243 {
244         struct hci_conn *conn = dev_get_drvdata(dev);
245         bdaddr_t bdaddr;
246         baswap(&bdaddr, &conn->dst);
247         return sprintf(buf, "%s\n", batostr(&bdaddr));
248 }
249
250 #define CONN_ATTR(_name,_mode,_show,_store) \
251 struct device_attribute conn_attr_##_name = __ATTR(_name,_mode,_show,_store)
252
253 static CONN_ATTR(type, S_IRUGO, show_conn_type, NULL);
254 static CONN_ATTR(address, S_IRUGO, show_conn_address, NULL);
255
256 static struct device_attribute *conn_attrs[] = {
257         &conn_attr_type,
258         &conn_attr_address,
259         NULL
260 };
261
262 struct class *bt_class = NULL;
263 EXPORT_SYMBOL_GPL(bt_class);
264
265 static struct bus_type bt_bus = {
266         .name   = "bluetooth",
267 };
268
269 static struct platform_device *bt_platform;
270
271 static void bt_release(struct device *dev)
272 {
273         void *data = dev_get_drvdata(dev);
274         kfree(data);
275 }
276
277 static void add_conn(struct work_struct *work)
278 {
279         struct hci_conn *conn = container_of(work, struct hci_conn, work);
280         int i;
281
282         if (device_add(&conn->dev) < 0) {
283                 BT_ERR("Failed to register connection device");
284                 return;
285         }
286
287         for (i = 0; conn_attrs[i]; i++)
288                 if (device_create_file(&conn->dev, conn_attrs[i]) < 0)
289                         BT_ERR("Failed to create connection attribute");
290 }
291
292 void hci_conn_add_sysfs(struct hci_conn *conn)
293 {
294         struct hci_dev *hdev = conn->hdev;
295         bdaddr_t *ba = &conn->dst;
296
297         BT_DBG("conn %p", conn);
298
299         conn->dev.bus = &bt_bus;
300         conn->dev.parent = &hdev->dev;
301
302         conn->dev.release = bt_release;
303
304         snprintf(conn->dev.bus_id, BUS_ID_SIZE,
305                         "%s%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X",
306                         conn->type == ACL_LINK ? "acl" : "sco",
307                         ba->b[5], ba->b[4], ba->b[3],
308                         ba->b[2], ba->b[1], ba->b[0]);
309
310         dev_set_drvdata(&conn->dev, conn);
311
312         device_initialize(&conn->dev);
313
314         INIT_WORK(&conn->work, add_conn);
315
316         schedule_work(&conn->work);
317 }
318
319 static int __match_tty(struct device *dev, void *data)
320 {
321         /* The rfcomm tty device will possibly retain even when conn
322          * is down, and sysfs doesn't support move zombie device,
323          * so we should move the device before conn device is destroyed.
324          * Due to the only child device of hci_conn dev is rfcomm
325          * tty_dev, here just return 1
326          */
327         return 1;
328 }
329
330 static void del_conn(struct work_struct *work)
331 {
332         struct device *dev;
333         struct hci_conn *conn = container_of(work, struct hci_conn, work);
334
335         while (dev = device_find_child(&conn->dev, NULL, __match_tty)) {
336                 device_move(dev, NULL);
337                 put_device(dev);
338         }
339         device_del(&conn->dev);
340         put_device(&conn->dev);
341 }
342
343 void hci_conn_del_sysfs(struct hci_conn *conn)
344 {
345         BT_DBG("conn %p", conn);
346
347         if (!device_is_registered(&conn->dev))
348                 return;
349
350         INIT_WORK(&conn->work, del_conn);
351
352         schedule_work(&conn->work);
353 }
354
355 int hci_register_sysfs(struct hci_dev *hdev)
356 {
357         struct device *dev = &hdev->dev;
358         unsigned int i;
359         int err;
360
361         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
362
363         dev->bus = &bt_bus;
364         dev->parent = hdev->parent;
365
366         strlcpy(dev->bus_id, hdev->name, BUS_ID_SIZE);
367
368         dev->release = bt_release;
369
370         dev_set_drvdata(dev, hdev);
371
372         err = device_register(dev);
373         if (err < 0)
374                 return err;
375
376         for (i = 0; bt_attrs[i]; i++)
377                 if (device_create_file(dev, bt_attrs[i]) < 0)
378                         BT_ERR("Failed to create device attribute");
379
380         if (sysfs_create_link(&bt_class->subsys.kobj,
381                                 &dev->kobj, kobject_name(&dev->kobj)) < 0)
382                 BT_ERR("Failed to create class symlink");
383
384         return 0;
385 }
386
387 void hci_unregister_sysfs(struct hci_dev *hdev)
388 {
389         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
390
391         sysfs_remove_link(&bt_class->subsys.kobj,
392                                         kobject_name(&hdev->dev.kobj));
393
394         device_del(&hdev->dev);
395 }
396
397 int __init bt_sysfs_init(void)
398 {
399         int err;
400
401         bt_platform = platform_device_register_simple("bluetooth", -1, NULL, 0);
402         if (IS_ERR(bt_platform))
403                 return PTR_ERR(bt_platform);
404
405         err = bus_register(&bt_bus);
406         if (err < 0) {
407                 platform_device_unregister(bt_platform);
408                 return err;
409         }
410
411         bt_class = class_create(THIS_MODULE, "bluetooth");
412         if (IS_ERR(bt_class)) {
413                 bus_unregister(&bt_bus);
414                 platform_device_unregister(bt_platform);
415                 return PTR_ERR(bt_class);
416         }
417
418         return 0;
419 }
420
421 void bt_sysfs_cleanup(void)
422 {
423         class_destroy(bt_class);
424
425         bus_unregister(&bt_bus);
426
427         platform_device_unregister(bt_platform);
428 }