Merge branch 'linus' into perfcounters/core-v2
[linux-2.6] / drivers / bluetooth / btusb.c
1 /*
2  *
3  *  Generic Bluetooth USB driver
4  *
5  *  Copyright (C) 2005-2008  Marcel Holtmann <marcel@holtmann.org>
6  *
7  *
8  *  This program is free software; you can redistribute it and/or modify
9  *  it under the terms of the GNU General Public License as published by
10  *  the Free Software Foundation; either version 2 of the License, or
11  *  (at your option) any later version.
12  *
13  *  This program is distributed in the hope that it will be useful,
14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  *  GNU General Public License for more details.
17  *
18  *  You should have received a copy of the GNU General Public License
19  *  along with this program; if not, write to the Free Software
20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
21  *
22  */
23
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/slab.h>
28 #include <linux/types.h>
29 #include <linux/sched.h>
30 #include <linux/errno.h>
31 #include <linux/skbuff.h>
32
33 #include <linux/usb.h>
34
35 #include <net/bluetooth/bluetooth.h>
36 #include <net/bluetooth/hci_core.h>
37
38 #define VERSION "0.5"
39
40 static int ignore_dga;
41 static int ignore_csr;
42 static int ignore_sniffer;
43 static int disable_scofix;
44 static int force_scofix;
45
46 static int reset = 1;
47
48 static struct usb_driver btusb_driver;
49
50 #define BTUSB_IGNORE            0x01
51 #define BTUSB_DIGIANSWER        0x02
52 #define BTUSB_CSR               0x04
53 #define BTUSB_SNIFFER           0x08
54 #define BTUSB_BCM92035          0x10
55 #define BTUSB_BROKEN_ISOC       0x20
56 #define BTUSB_WRONG_SCO_MTU     0x40
57
58 static struct usb_device_id btusb_table[] = {
59         /* Generic Bluetooth USB device */
60         { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
61
62         /* AVM BlueFRITZ! USB v2.0 */
63         { USB_DEVICE(0x057c, 0x3800) },
64
65         /* Bluetooth Ultraport Module from IBM */
66         { USB_DEVICE(0x04bf, 0x030a) },
67
68         /* ALPS Modules with non-standard id */
69         { USB_DEVICE(0x044e, 0x3001) },
70         { USB_DEVICE(0x044e, 0x3002) },
71
72         /* Ericsson with non-standard id */
73         { USB_DEVICE(0x0bdb, 0x1002) },
74
75         /* Canyon CN-BTU1 with HID interfaces */
76         { USB_DEVICE(0x0c10, 0x0000) },
77
78         { }     /* Terminating entry */
79 };
80
81 MODULE_DEVICE_TABLE(usb, btusb_table);
82
83 static struct usb_device_id blacklist_table[] = {
84         /* CSR BlueCore devices */
85         { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
86
87         /* Broadcom BCM2033 without firmware */
88         { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
89
90         /* Broadcom BCM2035 */
91         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
92         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
93         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
94
95         /* Broadcom BCM2045 */
96         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
97         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
98
99         /* IBM/Lenovo ThinkPad with Broadcom chip */
100         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
101         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
102
103         /* HP laptop with Broadcom chip */
104         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
105
106         /* Dell laptop with Broadcom chip */
107         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
108
109         /* Dell Wireless 370 and 410 devices */
110         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
111         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
112
113         /* Belkin F8T012 and F8T013 devices */
114         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
115         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
116
117         /* Asus WL-BTD202 device */
118         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
119
120         /* Kensington Bluetooth USB adapter */
121         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
122
123         /* RTX Telecom based adapters with buggy SCO support */
124         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
125         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
126
127         /* CONWISE Technology based adapters with buggy SCO support */
128         { USB_DEVICE(0x0e5e, 0x6622), .driver_info = BTUSB_BROKEN_ISOC },
129
130         /* Digianswer devices */
131         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
132         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
133
134         /* CSR BlueCore Bluetooth Sniffer */
135         { USB_DEVICE(0x0a12, 0x0002), .driver_info = BTUSB_SNIFFER },
136
137         /* Frontline ComProbe Bluetooth Sniffer */
138         { USB_DEVICE(0x16d3, 0x0002), .driver_info = BTUSB_SNIFFER },
139
140         { }     /* Terminating entry */
141 };
142
143 #define BTUSB_MAX_ISOC_FRAMES   10
144
145 #define BTUSB_INTR_RUNNING      0
146 #define BTUSB_BULK_RUNNING      1
147 #define BTUSB_ISOC_RUNNING      2
148
149 struct btusb_data {
150         struct hci_dev       *hdev;
151         struct usb_device    *udev;
152         struct usb_interface *intf;
153         struct usb_interface *isoc;
154
155         spinlock_t lock;
156
157         unsigned long flags;
158
159         struct work_struct work;
160
161         struct usb_anchor tx_anchor;
162         struct usb_anchor intr_anchor;
163         struct usb_anchor bulk_anchor;
164         struct usb_anchor isoc_anchor;
165
166         struct usb_endpoint_descriptor *intr_ep;
167         struct usb_endpoint_descriptor *bulk_tx_ep;
168         struct usb_endpoint_descriptor *bulk_rx_ep;
169         struct usb_endpoint_descriptor *isoc_tx_ep;
170         struct usb_endpoint_descriptor *isoc_rx_ep;
171
172         __u8 cmdreq_type;
173
174         unsigned int sco_num;
175         int isoc_altsetting;
176         int suspend_count;
177 };
178
179 static void btusb_intr_complete(struct urb *urb)
180 {
181         struct hci_dev *hdev = urb->context;
182         struct btusb_data *data = hdev->driver_data;
183         int err;
184
185         BT_DBG("%s urb %p status %d count %d", hdev->name,
186                                         urb, urb->status, urb->actual_length);
187
188         if (!test_bit(HCI_RUNNING, &hdev->flags))
189                 return;
190
191         if (urb->status == 0) {
192                 hdev->stat.byte_rx += urb->actual_length;
193
194                 if (hci_recv_fragment(hdev, HCI_EVENT_PKT,
195                                                 urb->transfer_buffer,
196                                                 urb->actual_length) < 0) {
197                         BT_ERR("%s corrupted event packet", hdev->name);
198                         hdev->stat.err_rx++;
199                 }
200         }
201
202         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
203                 return;
204
205         usb_anchor_urb(urb, &data->intr_anchor);
206
207         err = usb_submit_urb(urb, GFP_ATOMIC);
208         if (err < 0) {
209                 BT_ERR("%s urb %p failed to resubmit (%d)",
210                                                 hdev->name, urb, -err);
211                 usb_unanchor_urb(urb);
212         }
213 }
214
215 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
216 {
217         struct btusb_data *data = hdev->driver_data;
218         struct urb *urb;
219         unsigned char *buf;
220         unsigned int pipe;
221         int err, size;
222
223         BT_DBG("%s", hdev->name);
224
225         if (!data->intr_ep)
226                 return -ENODEV;
227
228         urb = usb_alloc_urb(0, mem_flags);
229         if (!urb)
230                 return -ENOMEM;
231
232         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
233
234         buf = kmalloc(size, mem_flags);
235         if (!buf) {
236                 usb_free_urb(urb);
237                 return -ENOMEM;
238         }
239
240         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
241
242         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
243                                                 btusb_intr_complete, hdev,
244                                                 data->intr_ep->bInterval);
245
246         urb->transfer_flags |= URB_FREE_BUFFER;
247
248         usb_anchor_urb(urb, &data->intr_anchor);
249
250         err = usb_submit_urb(urb, mem_flags);
251         if (err < 0) {
252                 BT_ERR("%s urb %p submission failed (%d)",
253                                                 hdev->name, urb, -err);
254                 usb_unanchor_urb(urb);
255         }
256
257         usb_free_urb(urb);
258
259         return err;
260 }
261
262 static void btusb_bulk_complete(struct urb *urb)
263 {
264         struct hci_dev *hdev = urb->context;
265         struct btusb_data *data = hdev->driver_data;
266         int err;
267
268         BT_DBG("%s urb %p status %d count %d", hdev->name,
269                                         urb, urb->status, urb->actual_length);
270
271         if (!test_bit(HCI_RUNNING, &hdev->flags))
272                 return;
273
274         if (urb->status == 0) {
275                 hdev->stat.byte_rx += urb->actual_length;
276
277                 if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT,
278                                                 urb->transfer_buffer,
279                                                 urb->actual_length) < 0) {
280                         BT_ERR("%s corrupted ACL packet", hdev->name);
281                         hdev->stat.err_rx++;
282                 }
283         }
284
285         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
286                 return;
287
288         usb_anchor_urb(urb, &data->bulk_anchor);
289
290         err = usb_submit_urb(urb, GFP_ATOMIC);
291         if (err < 0) {
292                 BT_ERR("%s urb %p failed to resubmit (%d)",
293                                                 hdev->name, urb, -err);
294                 usb_unanchor_urb(urb);
295         }
296 }
297
298 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
299 {
300         struct btusb_data *data = hdev->driver_data;
301         struct urb *urb;
302         unsigned char *buf;
303         unsigned int pipe;
304         int err, size;
305
306         BT_DBG("%s", hdev->name);
307
308         if (!data->bulk_rx_ep)
309                 return -ENODEV;
310
311         urb = usb_alloc_urb(0, mem_flags);
312         if (!urb)
313                 return -ENOMEM;
314
315         size = le16_to_cpu(data->bulk_rx_ep->wMaxPacketSize);
316
317         buf = kmalloc(size, mem_flags);
318         if (!buf) {
319                 usb_free_urb(urb);
320                 return -ENOMEM;
321         }
322
323         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
324
325         usb_fill_bulk_urb(urb, data->udev, pipe,
326                                         buf, size, btusb_bulk_complete, hdev);
327
328         urb->transfer_flags |= URB_FREE_BUFFER;
329
330         usb_anchor_urb(urb, &data->bulk_anchor);
331
332         err = usb_submit_urb(urb, mem_flags);
333         if (err < 0) {
334                 BT_ERR("%s urb %p submission failed (%d)",
335                                                 hdev->name, urb, -err);
336                 usb_unanchor_urb(urb);
337         }
338
339         usb_free_urb(urb);
340
341         return err;
342 }
343
344 static void btusb_isoc_complete(struct urb *urb)
345 {
346         struct hci_dev *hdev = urb->context;
347         struct btusb_data *data = hdev->driver_data;
348         int i, err;
349
350         BT_DBG("%s urb %p status %d count %d", hdev->name,
351                                         urb, urb->status, urb->actual_length);
352
353         if (!test_bit(HCI_RUNNING, &hdev->flags))
354                 return;
355
356         if (urb->status == 0) {
357                 for (i = 0; i < urb->number_of_packets; i++) {
358                         unsigned int offset = urb->iso_frame_desc[i].offset;
359                         unsigned int length = urb->iso_frame_desc[i].actual_length;
360
361                         if (urb->iso_frame_desc[i].status)
362                                 continue;
363
364                         hdev->stat.byte_rx += length;
365
366                         if (hci_recv_fragment(hdev, HCI_SCODATA_PKT,
367                                                 urb->transfer_buffer + offset,
368                                                                 length) < 0) {
369                                 BT_ERR("%s corrupted SCO packet", hdev->name);
370                                 hdev->stat.err_rx++;
371                         }
372                 }
373         }
374
375         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
376                 return;
377
378         usb_anchor_urb(urb, &data->isoc_anchor);
379
380         err = usb_submit_urb(urb, GFP_ATOMIC);
381         if (err < 0) {
382                 BT_ERR("%s urb %p failed to resubmit (%d)",
383                                                 hdev->name, urb, -err);
384                 usb_unanchor_urb(urb);
385         }
386 }
387
388 static void inline __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
389 {
390         int i, offset = 0;
391
392         BT_DBG("len %d mtu %d", len, mtu);
393
394         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
395                                         i++, offset += mtu, len -= mtu) {
396                 urb->iso_frame_desc[i].offset = offset;
397                 urb->iso_frame_desc[i].length = mtu;
398         }
399
400         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
401                 urb->iso_frame_desc[i].offset = offset;
402                 urb->iso_frame_desc[i].length = len;
403                 i++;
404         }
405
406         urb->number_of_packets = i;
407 }
408
409 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
410 {
411         struct btusb_data *data = hdev->driver_data;
412         struct urb *urb;
413         unsigned char *buf;
414         unsigned int pipe;
415         int err, size;
416
417         BT_DBG("%s", hdev->name);
418
419         if (!data->isoc_rx_ep)
420                 return -ENODEV;
421
422         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
423         if (!urb)
424                 return -ENOMEM;
425
426         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
427                                                 BTUSB_MAX_ISOC_FRAMES;
428
429         buf = kmalloc(size, mem_flags);
430         if (!buf) {
431                 usb_free_urb(urb);
432                 return -ENOMEM;
433         }
434
435         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
436
437         urb->dev      = data->udev;
438         urb->pipe     = pipe;
439         urb->context  = hdev;
440         urb->complete = btusb_isoc_complete;
441         urb->interval = data->isoc_rx_ep->bInterval;
442
443         urb->transfer_flags  = URB_FREE_BUFFER | URB_ISO_ASAP;
444         urb->transfer_buffer = buf;
445         urb->transfer_buffer_length = size;
446
447         __fill_isoc_descriptor(urb, size,
448                         le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
449
450         usb_anchor_urb(urb, &data->isoc_anchor);
451
452         err = usb_submit_urb(urb, mem_flags);
453         if (err < 0) {
454                 BT_ERR("%s urb %p submission failed (%d)",
455                                                 hdev->name, urb, -err);
456                 usb_unanchor_urb(urb);
457         }
458
459         usb_free_urb(urb);
460
461         return err;
462 }
463
464 static void btusb_tx_complete(struct urb *urb)
465 {
466         struct sk_buff *skb = urb->context;
467         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
468
469         BT_DBG("%s urb %p status %d count %d", hdev->name,
470                                         urb, urb->status, urb->actual_length);
471
472         if (!test_bit(HCI_RUNNING, &hdev->flags))
473                 goto done;
474
475         if (!urb->status)
476                 hdev->stat.byte_tx += urb->transfer_buffer_length;
477         else
478                 hdev->stat.err_tx++;
479
480 done:
481         kfree(urb->setup_packet);
482
483         kfree_skb(skb);
484 }
485
486 static int btusb_open(struct hci_dev *hdev)
487 {
488         struct btusb_data *data = hdev->driver_data;
489         int err;
490
491         BT_DBG("%s", hdev->name);
492
493         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
494                 return 0;
495
496         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
497                 return 0;
498
499         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
500         if (err < 0)
501                 goto failed;
502
503         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
504         if (err < 0) {
505                 usb_kill_anchored_urbs(&data->intr_anchor);
506                 goto failed;
507         }
508
509         set_bit(BTUSB_BULK_RUNNING, &data->flags);
510         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
511
512         return 0;
513
514 failed:
515         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
516         clear_bit(HCI_RUNNING, &hdev->flags);
517         return err;
518 }
519
520 static int btusb_close(struct hci_dev *hdev)
521 {
522         struct btusb_data *data = hdev->driver_data;
523
524         BT_DBG("%s", hdev->name);
525
526         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
527                 return 0;
528
529         cancel_work_sync(&data->work);
530
531         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
532         usb_kill_anchored_urbs(&data->isoc_anchor);
533
534         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
535         usb_kill_anchored_urbs(&data->bulk_anchor);
536
537         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
538         usb_kill_anchored_urbs(&data->intr_anchor);
539
540         return 0;
541 }
542
543 static int btusb_flush(struct hci_dev *hdev)
544 {
545         struct btusb_data *data = hdev->driver_data;
546
547         BT_DBG("%s", hdev->name);
548
549         usb_kill_anchored_urbs(&data->tx_anchor);
550
551         return 0;
552 }
553
554 static int btusb_send_frame(struct sk_buff *skb)
555 {
556         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
557         struct btusb_data *data = hdev->driver_data;
558         struct usb_ctrlrequest *dr;
559         struct urb *urb;
560         unsigned int pipe;
561         int err;
562
563         BT_DBG("%s", hdev->name);
564
565         if (!test_bit(HCI_RUNNING, &hdev->flags))
566                 return -EBUSY;
567
568         switch (bt_cb(skb)->pkt_type) {
569         case HCI_COMMAND_PKT:
570                 urb = usb_alloc_urb(0, GFP_ATOMIC);
571                 if (!urb)
572                         return -ENOMEM;
573
574                 dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
575                 if (!dr) {
576                         usb_free_urb(urb);
577                         return -ENOMEM;
578                 }
579
580                 dr->bRequestType = data->cmdreq_type;
581                 dr->bRequest     = 0;
582                 dr->wIndex       = 0;
583                 dr->wValue       = 0;
584                 dr->wLength      = __cpu_to_le16(skb->len);
585
586                 pipe = usb_sndctrlpipe(data->udev, 0x00);
587
588                 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
589                                 skb->data, skb->len, btusb_tx_complete, skb);
590
591                 hdev->stat.cmd_tx++;
592                 break;
593
594         case HCI_ACLDATA_PKT:
595                 if (!data->bulk_tx_ep || hdev->conn_hash.acl_num < 1)
596                         return -ENODEV;
597
598                 urb = usb_alloc_urb(0, GFP_ATOMIC);
599                 if (!urb)
600                         return -ENOMEM;
601
602                 pipe = usb_sndbulkpipe(data->udev,
603                                         data->bulk_tx_ep->bEndpointAddress);
604
605                 usb_fill_bulk_urb(urb, data->udev, pipe,
606                                 skb->data, skb->len, btusb_tx_complete, skb);
607
608                 hdev->stat.acl_tx++;
609                 break;
610
611         case HCI_SCODATA_PKT:
612                 if (!data->isoc_tx_ep || hdev->conn_hash.sco_num < 1)
613                         return -ENODEV;
614
615                 urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_ATOMIC);
616                 if (!urb)
617                         return -ENOMEM;
618
619                 pipe = usb_sndisocpipe(data->udev,
620                                         data->isoc_tx_ep->bEndpointAddress);
621
622                 urb->dev      = data->udev;
623                 urb->pipe     = pipe;
624                 urb->context  = skb;
625                 urb->complete = btusb_tx_complete;
626                 urb->interval = data->isoc_tx_ep->bInterval;
627
628                 urb->transfer_flags  = URB_ISO_ASAP;
629                 urb->transfer_buffer = skb->data;
630                 urb->transfer_buffer_length = skb->len;
631
632                 __fill_isoc_descriptor(urb, skb->len,
633                                 le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
634
635                 hdev->stat.sco_tx++;
636                 break;
637
638         default:
639                 return -EILSEQ;
640         }
641
642         usb_anchor_urb(urb, &data->tx_anchor);
643
644         err = usb_submit_urb(urb, GFP_ATOMIC);
645         if (err < 0) {
646                 BT_ERR("%s urb %p submission failed", hdev->name, urb);
647                 kfree(urb->setup_packet);
648                 usb_unanchor_urb(urb);
649         }
650
651         usb_free_urb(urb);
652
653         return err;
654 }
655
656 static void btusb_destruct(struct hci_dev *hdev)
657 {
658         struct btusb_data *data = hdev->driver_data;
659
660         BT_DBG("%s", hdev->name);
661
662         kfree(data);
663 }
664
665 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
666 {
667         struct btusb_data *data = hdev->driver_data;
668
669         BT_DBG("%s evt %d", hdev->name, evt);
670
671         if (hdev->conn_hash.sco_num != data->sco_num) {
672                 data->sco_num = hdev->conn_hash.sco_num;
673                 schedule_work(&data->work);
674         }
675 }
676
677 static int inline __set_isoc_interface(struct hci_dev *hdev, int altsetting)
678 {
679         struct btusb_data *data = hdev->driver_data;
680         struct usb_interface *intf = data->isoc;
681         struct usb_endpoint_descriptor *ep_desc;
682         int i, err;
683
684         if (!data->isoc)
685                 return -ENODEV;
686
687         err = usb_set_interface(data->udev, 1, altsetting);
688         if (err < 0) {
689                 BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
690                 return err;
691         }
692
693         data->isoc_altsetting = altsetting;
694
695         data->isoc_tx_ep = NULL;
696         data->isoc_rx_ep = NULL;
697
698         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
699                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
700
701                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
702                         data->isoc_tx_ep = ep_desc;
703                         continue;
704                 }
705
706                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
707                         data->isoc_rx_ep = ep_desc;
708                         continue;
709                 }
710         }
711
712         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
713                 BT_ERR("%s invalid SCO descriptors", hdev->name);
714                 return -ENODEV;
715         }
716
717         return 0;
718 }
719
720 static void btusb_work(struct work_struct *work)
721 {
722         struct btusb_data *data = container_of(work, struct btusb_data, work);
723         struct hci_dev *hdev = data->hdev;
724
725         if (hdev->conn_hash.sco_num > 0) {
726                 if (data->isoc_altsetting != 2) {
727                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
728                         usb_kill_anchored_urbs(&data->isoc_anchor);
729
730                         if (__set_isoc_interface(hdev, 2) < 0)
731                                 return;
732                 }
733
734                 if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
735                         if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
736                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
737                         else
738                                 btusb_submit_isoc_urb(hdev, GFP_KERNEL);
739                 }
740         } else {
741                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
742                 usb_kill_anchored_urbs(&data->isoc_anchor);
743
744                 __set_isoc_interface(hdev, 0);
745         }
746 }
747
748 static int btusb_probe(struct usb_interface *intf,
749                                 const struct usb_device_id *id)
750 {
751         struct usb_endpoint_descriptor *ep_desc;
752         struct btusb_data *data;
753         struct hci_dev *hdev;
754         int i, err;
755
756         BT_DBG("intf %p id %p", intf, id);
757
758         /* interface numbers are hardcoded in the spec */
759         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
760                 return -ENODEV;
761
762         if (!id->driver_info) {
763                 const struct usb_device_id *match;
764                 match = usb_match_id(intf, blacklist_table);
765                 if (match)
766                         id = match;
767         }
768
769         if (id->driver_info == BTUSB_IGNORE)
770                 return -ENODEV;
771
772         if (ignore_dga && id->driver_info & BTUSB_DIGIANSWER)
773                 return -ENODEV;
774
775         if (ignore_csr && id->driver_info & BTUSB_CSR)
776                 return -ENODEV;
777
778         if (ignore_sniffer && id->driver_info & BTUSB_SNIFFER)
779                 return -ENODEV;
780
781         data = kzalloc(sizeof(*data), GFP_KERNEL);
782         if (!data)
783                 return -ENOMEM;
784
785         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
786                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
787
788                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
789                         data->intr_ep = ep_desc;
790                         continue;
791                 }
792
793                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
794                         data->bulk_tx_ep = ep_desc;
795                         continue;
796                 }
797
798                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
799                         data->bulk_rx_ep = ep_desc;
800                         continue;
801                 }
802         }
803
804         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep) {
805                 kfree(data);
806                 return -ENODEV;
807         }
808
809         data->cmdreq_type = USB_TYPE_CLASS;
810
811         data->udev = interface_to_usbdev(intf);
812         data->intf = intf;
813
814         spin_lock_init(&data->lock);
815
816         INIT_WORK(&data->work, btusb_work);
817
818         init_usb_anchor(&data->tx_anchor);
819         init_usb_anchor(&data->intr_anchor);
820         init_usb_anchor(&data->bulk_anchor);
821         init_usb_anchor(&data->isoc_anchor);
822
823         hdev = hci_alloc_dev();
824         if (!hdev) {
825                 kfree(data);
826                 return -ENOMEM;
827         }
828
829         hdev->type = HCI_USB;
830         hdev->driver_data = data;
831
832         data->hdev = hdev;
833
834         SET_HCIDEV_DEV(hdev, &intf->dev);
835
836         hdev->open     = btusb_open;
837         hdev->close    = btusb_close;
838         hdev->flush    = btusb_flush;
839         hdev->send     = btusb_send_frame;
840         hdev->destruct = btusb_destruct;
841         hdev->notify   = btusb_notify;
842
843         hdev->owner = THIS_MODULE;
844
845         /* Interface numbers are hardcoded in the specification */
846         data->isoc = usb_ifnum_to_if(data->udev, 1);
847
848         if (!reset)
849                 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
850
851         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
852                 if (!disable_scofix)
853                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
854         }
855
856         if (id->driver_info & BTUSB_BROKEN_ISOC)
857                 data->isoc = NULL;
858
859         if (id->driver_info & BTUSB_DIGIANSWER) {
860                 data->cmdreq_type = USB_TYPE_VENDOR;
861                 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
862         }
863
864         if (id->driver_info & BTUSB_CSR) {
865                 struct usb_device *udev = data->udev;
866
867                 /* Old firmware would otherwise execute USB reset */
868                 if (le16_to_cpu(udev->descriptor.bcdDevice) < 0x117)
869                         set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
870         }
871
872         if (id->driver_info & BTUSB_SNIFFER) {
873                 struct usb_device *udev = data->udev;
874
875                 /* New sniffer firmware has crippled HCI interface */
876                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
877                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
878
879                 data->isoc = NULL;
880         }
881
882         if (id->driver_info & BTUSB_BCM92035) {
883                 unsigned char cmd[] = { 0x3b, 0xfc, 0x01, 0x00 };
884                 struct sk_buff *skb;
885
886                 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
887                 if (skb) {
888                         memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));
889                         skb_queue_tail(&hdev->driver_init, skb);
890                 }
891         }
892
893         if (data->isoc) {
894                 err = usb_driver_claim_interface(&btusb_driver,
895                                                         data->isoc, data);
896                 if (err < 0) {
897                         hci_free_dev(hdev);
898                         kfree(data);
899                         return err;
900                 }
901         }
902
903         err = hci_register_dev(hdev);
904         if (err < 0) {
905                 hci_free_dev(hdev);
906                 kfree(data);
907                 return err;
908         }
909
910         usb_set_intfdata(intf, data);
911
912         return 0;
913 }
914
915 static void btusb_disconnect(struct usb_interface *intf)
916 {
917         struct btusb_data *data = usb_get_intfdata(intf);
918         struct hci_dev *hdev;
919
920         BT_DBG("intf %p", intf);
921
922         if (!data)
923                 return;
924
925         hdev = data->hdev;
926
927         __hci_dev_hold(hdev);
928
929         usb_set_intfdata(data->intf, NULL);
930
931         if (data->isoc)
932                 usb_set_intfdata(data->isoc, NULL);
933
934         hci_unregister_dev(hdev);
935
936         if (intf == data->isoc)
937                 usb_driver_release_interface(&btusb_driver, data->intf);
938         else if (data->isoc)
939                 usb_driver_release_interface(&btusb_driver, data->isoc);
940
941         __hci_dev_put(hdev);
942
943         hci_free_dev(hdev);
944 }
945
946 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
947 {
948         struct btusb_data *data = usb_get_intfdata(intf);
949
950         BT_DBG("intf %p", intf);
951
952         if (data->suspend_count++)
953                 return 0;
954
955         cancel_work_sync(&data->work);
956
957         usb_kill_anchored_urbs(&data->tx_anchor);
958
959         usb_kill_anchored_urbs(&data->isoc_anchor);
960         usb_kill_anchored_urbs(&data->bulk_anchor);
961         usb_kill_anchored_urbs(&data->intr_anchor);
962
963         return 0;
964 }
965
966 static int btusb_resume(struct usb_interface *intf)
967 {
968         struct btusb_data *data = usb_get_intfdata(intf);
969         struct hci_dev *hdev = data->hdev;
970         int err;
971
972         BT_DBG("intf %p", intf);
973
974         if (--data->suspend_count)
975                 return 0;
976
977         if (!test_bit(HCI_RUNNING, &hdev->flags))
978                 return 0;
979
980         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
981                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
982                 if (err < 0) {
983                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
984                         return err;
985                 }
986         }
987
988         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
989                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
990                 if (err < 0) {
991                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
992                         return err;
993                 } else
994                         btusb_submit_bulk_urb(hdev, GFP_NOIO);
995         }
996
997         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
998                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
999                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1000                 else
1001                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
1002         }
1003
1004         return 0;
1005 }
1006
1007 static struct usb_driver btusb_driver = {
1008         .name           = "btusb",
1009         .probe          = btusb_probe,
1010         .disconnect     = btusb_disconnect,
1011         .suspend        = btusb_suspend,
1012         .resume         = btusb_resume,
1013         .id_table       = btusb_table,
1014 };
1015
1016 static int __init btusb_init(void)
1017 {
1018         BT_INFO("Generic Bluetooth USB driver ver %s", VERSION);
1019
1020         return usb_register(&btusb_driver);
1021 }
1022
1023 static void __exit btusb_exit(void)
1024 {
1025         usb_deregister(&btusb_driver);
1026 }
1027
1028 module_init(btusb_init);
1029 module_exit(btusb_exit);
1030
1031 module_param(ignore_dga, bool, 0644);
1032 MODULE_PARM_DESC(ignore_dga, "Ignore devices with id 08fd:0001");
1033
1034 module_param(ignore_csr, bool, 0644);
1035 MODULE_PARM_DESC(ignore_csr, "Ignore devices with id 0a12:0001");
1036
1037 module_param(ignore_sniffer, bool, 0644);
1038 MODULE_PARM_DESC(ignore_sniffer, "Ignore devices with id 0a12:0002");
1039
1040 module_param(disable_scofix, bool, 0644);
1041 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
1042
1043 module_param(force_scofix, bool, 0644);
1044 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
1045
1046 module_param(reset, bool, 0644);
1047 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
1048
1049 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
1050 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
1051 MODULE_VERSION(VERSION);
1052 MODULE_LICENSE("GPL");