Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/bluetooth/bfusb.c

  1 /*
  2  *
  3  *  AVM BlueFRITZ! USB driver
  4  *
  5  *  Copyright (C) 2003-2006  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/module.h>
 25 
 26 #include <linux/kernel.h>
 27 #include <linux/init.h>
 28 #include <linux/slab.h>
 29 #include <linux/types.h>
 30 #include <linux/errno.h>
 31 #include <linux/skbuff.h>
 32 
 33 #include <linux/device.h>
 34 #include <linux/firmware.h>
 35 
 36 #include <linux/usb.h>
 37 
 38 #include <net/bluetooth/bluetooth.h>
 39 #include <net/bluetooth/hci_core.h>
 40 
 41 #define VERSION "1.2"
 42 
 43 static struct usb_driver bfusb_driver;
 44 
 45 static const struct usb_device_id bfusb_table[] = {
 46         /* AVM BlueFRITZ! USB */
 47         { USB_DEVICE(0x057c, 0x2200) },
 48 
 49         { }     /* Terminating entry */
 50 };
 51 
 52 MODULE_DEVICE_TABLE(usb, bfusb_table);
 53 
 54 #define BFUSB_MAX_BLOCK_SIZE    256
 55 
 56 #define BFUSB_BLOCK_TIMEOUT     3000
 57 
 58 #define BFUSB_TX_PROCESS        1
 59 #define BFUSB_TX_WAKEUP         2
 60 
 61 #define BFUSB_MAX_BULK_TX       2
 62 #define BFUSB_MAX_BULK_RX       2
 63 
 64 struct bfusb_data {
 65         struct hci_dev          *hdev;
 66 
 67         unsigned long           state;
 68 
 69         struct usb_device       *udev;
 70 
 71         unsigned int            bulk_in_ep;
 72         unsigned int            bulk_out_ep;
 73         unsigned int            bulk_pkt_size;
 74 
 75         rwlock_t                lock;
 76 
 77         struct sk_buff_head     transmit_q;
 78 
 79         struct sk_buff          *reassembly;
 80 
 81         atomic_t                pending_tx;
 82         struct sk_buff_head     pending_q;
 83         struct sk_buff_head     completed_q;
 84 };
 85 
 86 struct bfusb_data_scb {
 87         struct urb *urb;
 88 };
 89 
 90 static void bfusb_tx_complete(struct urb *urb);
 91 static void bfusb_rx_complete(struct urb *urb);
 92 
 93 static struct urb *bfusb_get_completed(struct bfusb_data *data)
 94 {
 95         struct sk_buff *skb;
 96         struct urb *urb = NULL;
 97 
 98         BT_DBG("bfusb %p", data);
 99 
100         skb = skb_dequeue(&data->completed_q);
101         if (skb) {
102                 urb = ((struct bfusb_data_scb *) skb->cb)->urb;
103                 kfree_skb(skb);
104         }
105 
106         return urb;
107 }
108 
109 static void bfusb_unlink_urbs(struct bfusb_data *data)
110 {
111         struct sk_buff *skb;
112         struct urb *urb;
113 
114         BT_DBG("bfusb %p", data);
115 
116         while ((skb = skb_dequeue(&data->pending_q))) {
117                 urb = ((struct bfusb_data_scb *) skb->cb)->urb;
118                 usb_kill_urb(urb);
119                 skb_queue_tail(&data->completed_q, skb);
120         }
121 
122         while ((urb = bfusb_get_completed(data)))
123                 usb_free_urb(urb);
124 }
125 
126 static int bfusb_send_bulk(struct bfusb_data *data, struct sk_buff *skb)
127 {
128         struct bfusb_data_scb *scb = (void *) skb->cb;
129         struct urb *urb = bfusb_get_completed(data);
130         int err, pipe;
131 
132         BT_DBG("bfusb %p skb %p len %d", data, skb, skb->len);
133 
134         if (!urb) {
135                 urb = usb_alloc_urb(0, GFP_ATOMIC);
136                 if (!urb)
137                         return -ENOMEM;
138         }
139 
140         pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
141 
142         usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, skb->len,
143                         bfusb_tx_complete, skb);
144 
145         scb->urb = urb;
146 
147         skb_queue_tail(&data->pending_q, skb);
148 
149         err = usb_submit_urb(urb, GFP_ATOMIC);
150         if (err) {
151                 BT_ERR("%s bulk tx submit failed urb %p err %d", 
152                                         data->hdev->name, urb, err);
153                 skb_unlink(skb, &data->pending_q);
154                 usb_free_urb(urb);
155         } else
156                 atomic_inc(&data->pending_tx);
157 
158         return err;
159 }
160 
161 static void bfusb_tx_wakeup(struct bfusb_data *data)
162 {
163         struct sk_buff *skb;
164 
165         BT_DBG("bfusb %p", data);
166 
167         if (test_and_set_bit(BFUSB_TX_PROCESS, &data->state)) {
168                 set_bit(BFUSB_TX_WAKEUP, &data->state);
169                 return;
170         }
171 
172         do {
173                 clear_bit(BFUSB_TX_WAKEUP, &data->state);
174 
175                 while ((atomic_read(&data->pending_tx) < BFUSB_MAX_BULK_TX) &&
176                                 (skb = skb_dequeue(&data->transmit_q))) {
177                         if (bfusb_send_bulk(data, skb) < 0) {
178                                 skb_queue_head(&data->transmit_q, skb);
179                                 break;
180                         }
181                 }
182 
183         } while (test_bit(BFUSB_TX_WAKEUP, &data->state));
184 
185         clear_bit(BFUSB_TX_PROCESS, &data->state);
186 }
187 
188 static void bfusb_tx_complete(struct urb *urb)
189 {
190         struct sk_buff *skb = (struct sk_buff *) urb->context;
191         struct bfusb_data *data = (struct bfusb_data *) skb->dev;
192 
193         BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
194 
195         atomic_dec(&data->pending_tx);
196 
197         if (!test_bit(HCI_RUNNING, &data->hdev->flags))
198                 return;
199 
200         if (!urb->status)
201                 data->hdev->stat.byte_tx += skb->len;
202         else
203                 data->hdev->stat.err_tx++;
204 
205         read_lock(&data->lock);
206 
207         skb_unlink(skb, &data->pending_q);
208         skb_queue_tail(&data->completed_q, skb);
209 
210         bfusb_tx_wakeup(data);
211 
212         read_unlock(&data->lock);
213 }
214 
215 
216 static int bfusb_rx_submit(struct bfusb_data *data, struct urb *urb)
217 {
218         struct bfusb_data_scb *scb;
219         struct sk_buff *skb;
220         int err, pipe, size = HCI_MAX_FRAME_SIZE + 32;
221 
222         BT_DBG("bfusb %p urb %p", data, urb);
223 
224         if (!urb) {
225                 urb = usb_alloc_urb(0, GFP_ATOMIC);
226                 if (!urb)
227                         return -ENOMEM;
228         }
229 
230         skb = bt_skb_alloc(size, GFP_ATOMIC);
231         if (!skb) {
232                 usb_free_urb(urb);
233                 return -ENOMEM;
234         }
235 
236         skb->dev = (void *) data;
237 
238         scb = (struct bfusb_data_scb *) skb->cb;
239         scb->urb = urb;
240 
241         pipe = usb_rcvbulkpipe(data->udev, data->bulk_in_ep);
242 
243         usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, size,
244                         bfusb_rx_complete, skb);
245 
246         skb_queue_tail(&data->pending_q, skb);
247 
248         err = usb_submit_urb(urb, GFP_ATOMIC);
249         if (err) {
250                 BT_ERR("%s bulk rx submit failed urb %p err %d",
251                                         data->hdev->name, urb, err);
252                 skb_unlink(skb, &data->pending_q);
253                 kfree_skb(skb);
254                 usb_free_urb(urb);
255         }
256 
257         return err;
258 }
259 
260 static inline int bfusb_recv_block(struct bfusb_data *data, int hdr, unsigned char *buf, int len)
261 {
262         BT_DBG("bfusb %p hdr 0x%02x data %p len %d", data, hdr, buf, len);
263 
264         if (hdr & 0x10) {
265                 BT_ERR("%s error in block", data->hdev->name);
266                 kfree_skb(data->reassembly);
267                 data->reassembly = NULL;
268                 return -EIO;
269         }
270 
271         if (hdr & 0x04) {
272                 struct sk_buff *skb;
273                 unsigned char pkt_type;
274                 int pkt_len = 0;
275 
276                 if (data->reassembly) {
277                         BT_ERR("%s unexpected start block", data->hdev->name);
278                         kfree_skb(data->reassembly);
279                         data->reassembly = NULL;
280                 }
281 
282                 if (len < 1) {
283                         BT_ERR("%s no packet type found", data->hdev->name);
284                         return -EPROTO;
285                 }
286 
287                 pkt_type = *buf++; len--;
288 
289                 switch (pkt_type) {
290                 case HCI_EVENT_PKT:
291                         if (len >= HCI_EVENT_HDR_SIZE) {
292                                 struct hci_event_hdr *hdr = (struct hci_event_hdr *) buf;
293                                 pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen;
294                         } else {
295                                 BT_ERR("%s event block is too short", data->hdev->name);
296                                 return -EILSEQ;
297                         }
298                         break;
299 
300                 case HCI_ACLDATA_PKT:
301                         if (len >= HCI_ACL_HDR_SIZE) {
302                                 struct hci_acl_hdr *hdr = (struct hci_acl_hdr *) buf;
303                                 pkt_len = HCI_ACL_HDR_SIZE + __le16_to_cpu(hdr->dlen);
304                         } else {
305                                 BT_ERR("%s data block is too short", data->hdev->name);
306                                 return -EILSEQ;
307                         }
308                         break;
309 
310                 case HCI_SCODATA_PKT:
311                         if (len >= HCI_SCO_HDR_SIZE) {
312                                 struct hci_sco_hdr *hdr = (struct hci_sco_hdr *) buf;
313                                 pkt_len = HCI_SCO_HDR_SIZE + hdr->dlen;
314                         } else {
315                                 BT_ERR("%s audio block is too short", data->hdev->name);
316                                 return -EILSEQ;
317                         }
318                         break;
319                 }
320 
321                 skb = bt_skb_alloc(pkt_len, GFP_ATOMIC);
322                 if (!skb) {
323                         BT_ERR("%s no memory for the packet", data->hdev->name);
324                         return -ENOMEM;
325                 }
326 
327                 bt_cb(skb)->pkt_type = pkt_type;
328 
329                 data->reassembly = skb;
330         } else {
331                 if (!data->reassembly) {
332                         BT_ERR("%s unexpected continuation block", data->hdev->name);
333                         return -EIO;
334                 }
335         }
336 
337         if (len > 0)
338                 memcpy(skb_put(data->reassembly, len), buf, len);
339 
340         if (hdr & 0x08) {
341                 hci_recv_frame(data->hdev, data->reassembly);
342                 data->reassembly = NULL;
343         }
344 
345         return 0;
346 }
347 
348 static void bfusb_rx_complete(struct urb *urb)
349 {
350         struct sk_buff *skb = (struct sk_buff *) urb->context;
351         struct bfusb_data *data = (struct bfusb_data *) skb->dev;
352         unsigned char *buf = urb->transfer_buffer;
353         int count = urb->actual_length;
354         int err, hdr, len;
355 
356         BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
357 
358         read_lock(&data->lock);
359 
360         if (!test_bit(HCI_RUNNING, &data->hdev->flags))
361                 goto unlock;
362 
363         if (urb->status || !count)
364                 goto resubmit;
365 
366         data->hdev->stat.byte_rx += count;
367 
368         skb_put(skb, count);
369 
370         while (count) {
371                 hdr = buf[0] | (buf[1] << 8);
372 
373                 if (hdr & 0x4000) {
374                         len = 0;
375                         count -= 2;
376                         buf   += 2;
377                 } else {
378                         len = (buf[2] == 0) ? 256 : buf[2];
379                         count -= 3;
380                         buf   += 3;
381                 }
382 
383                 if (count < len) {
384                         BT_ERR("%s block extends over URB buffer ranges",
385                                         data->hdev->name);
386                 }
387 
388                 if ((hdr & 0xe1) == 0xc1)
389                         bfusb_recv_block(data, hdr, buf, len);
390 
391                 count -= len;
392                 buf   += len;
393         }
394 
395         skb_unlink(skb, &data->pending_q);
396         kfree_skb(skb);
397 
398         bfusb_rx_submit(data, urb);
399 
400         read_unlock(&data->lock);
401 
402         return;
403 
404 resubmit:
405         urb->dev = data->udev;
406 
407         err = usb_submit_urb(urb, GFP_ATOMIC);
408         if (err) {
409                 BT_ERR("%s bulk resubmit failed urb %p err %d",
410                                         data->hdev->name, urb, err);
411         }
412 
413 unlock:
414         read_unlock(&data->lock);
415 }
416 
417 static int bfusb_open(struct hci_dev *hdev)
418 {
419         struct bfusb_data *data = hci_get_drvdata(hdev);
420         unsigned long flags;
421         int i, err;
422 
423         BT_DBG("hdev %p bfusb %p", hdev, data);
424 
425         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
426                 return 0;
427 
428         write_lock_irqsave(&data->lock, flags);
429 
430         err = bfusb_rx_submit(data, NULL);
431         if (!err) {
432                 for (i = 1; i < BFUSB_MAX_BULK_RX; i++)
433                         bfusb_rx_submit(data, NULL);
434         } else {
435                 clear_bit(HCI_RUNNING, &hdev->flags);
436         }
437 
438         write_unlock_irqrestore(&data->lock, flags);
439 
440         return err;
441 }
442 
443 static int bfusb_flush(struct hci_dev *hdev)
444 {
445         struct bfusb_data *data = hci_get_drvdata(hdev);
446 
447         BT_DBG("hdev %p bfusb %p", hdev, data);
448 
449         skb_queue_purge(&data->transmit_q);
450 
451         return 0;
452 }
453 
454 static int bfusb_close(struct hci_dev *hdev)
455 {
456         struct bfusb_data *data = hci_get_drvdata(hdev);
457         unsigned long flags;
458 
459         BT_DBG("hdev %p bfusb %p", hdev, data);
460 
461         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
462                 return 0;
463 
464         write_lock_irqsave(&data->lock, flags);
465         write_unlock_irqrestore(&data->lock, flags);
466 
467         bfusb_unlink_urbs(data);
468         bfusb_flush(hdev);
469 
470         return 0;
471 }
472 
473 static int bfusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
474 {
475         struct bfusb_data *data = hci_get_drvdata(hdev);
476         struct sk_buff *nskb;
477         unsigned char buf[3];
478         int sent = 0, size, count;
479 
480         BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, bt_cb(skb)->pkt_type, skb->len);
481 
482         if (!test_bit(HCI_RUNNING, &hdev->flags))
483                 return -EBUSY;
484 
485         switch (bt_cb(skb)->pkt_type) {
486         case HCI_COMMAND_PKT:
487                 hdev->stat.cmd_tx++;
488                 break;
489         case HCI_ACLDATA_PKT:
490                 hdev->stat.acl_tx++;
491                 break;
492         case HCI_SCODATA_PKT:
493                 hdev->stat.sco_tx++;
494                 break;
495         };
496 
497         /* Prepend skb with frame type */
498         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
499 
500         count = skb->len;
501 
502         /* Max HCI frame size seems to be 1511 + 1 */
503         nskb = bt_skb_alloc(count + 32, GFP_ATOMIC);
504         if (!nskb) {
505                 BT_ERR("Can't allocate memory for new packet");
506                 return -ENOMEM;
507         }
508 
509         nskb->dev = (void *) data;
510 
511         while (count) {
512                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE);
513 
514                 buf[0] = 0xc1 | ((sent == 0) ? 0x04 : 0) | ((count == size) ? 0x08 : 0);
515                 buf[1] = 0x00;
516                 buf[2] = (size == BFUSB_MAX_BLOCK_SIZE) ? 0 : size;
517 
518                 memcpy(skb_put(nskb, 3), buf, 3);
519                 skb_copy_from_linear_data_offset(skb, sent, skb_put(nskb, size), size);
520 
521                 sent  += size;
522                 count -= size;
523         }
524 
525         /* Don't send frame with multiple size of bulk max packet */
526         if ((nskb->len % data->bulk_pkt_size) == 0) {
527                 buf[0] = 0xdd;
528                 buf[1] = 0x00;
529                 memcpy(skb_put(nskb, 2), buf, 2);
530         }
531 
532         read_lock(&data->lock);
533 
534         skb_queue_tail(&data->transmit_q, nskb);
535         bfusb_tx_wakeup(data);
536 
537         read_unlock(&data->lock);
538 
539         kfree_skb(skb);
540 
541         return 0;
542 }
543 
544 static int bfusb_load_firmware(struct bfusb_data *data,
545                                const unsigned char *firmware, int count)
546 {
547         unsigned char *buf;
548         int err, pipe, len, size, sent = 0;
549 
550         BT_DBG("bfusb %p udev %p", data, data->udev);
551 
552         BT_INFO("BlueFRITZ! USB loading firmware");
553 
554         buf = kmalloc(BFUSB_MAX_BLOCK_SIZE + 3, GFP_KERNEL);
555         if (!buf) {
556                 BT_ERR("Can't allocate memory chunk for firmware");
557                 return -ENOMEM;
558         }
559 
560         pipe = usb_sndctrlpipe(data->udev, 0);
561 
562         if (usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
563                                 0, 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT) < 0) {
564                 BT_ERR("Can't change to loading configuration");
565                 kfree(buf);
566                 return -EBUSY;
567         }
568 
569         data->udev->toggle[0] = data->udev->toggle[1] = 0;
570 
571         pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
572 
573         while (count) {
574                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE + 3);
575 
576                 memcpy(buf, firmware + sent, size);
577 
578                 err = usb_bulk_msg(data->udev, pipe, buf, size,
579                                         &len, BFUSB_BLOCK_TIMEOUT);
580 
581                 if (err || (len != size)) {
582                         BT_ERR("Error in firmware loading");
583                         goto error;
584                 }
585 
586                 sent  += size;
587                 count -= size;
588         }
589 
590         err = usb_bulk_msg(data->udev, pipe, NULL, 0,
591                                         &len, BFUSB_BLOCK_TIMEOUT);
592         if (err < 0) {
593                 BT_ERR("Error in null packet request");
594                 goto error;
595         }
596 
597         pipe = usb_sndctrlpipe(data->udev, 0);
598 
599         err = usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
600                                 0, 2, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
601         if (err < 0) {
602                 BT_ERR("Can't change to running configuration");
603                 goto error;
604         }
605 
606         data->udev->toggle[0] = data->udev->toggle[1] = 0;
607 
608         BT_INFO("BlueFRITZ! USB device ready");
609 
610         kfree(buf);
611         return 0;
612 
613 error:
614         kfree(buf);
615 
616         pipe = usb_sndctrlpipe(data->udev, 0);
617 
618         usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
619                                 0, 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
620 
621         return err;
622 }
623 
624 static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
625 {
626         const struct firmware *firmware;
627         struct usb_device *udev = interface_to_usbdev(intf);
628         struct usb_host_endpoint *bulk_out_ep;
629         struct usb_host_endpoint *bulk_in_ep;
630         struct hci_dev *hdev;
631         struct bfusb_data *data;
632 
633         BT_DBG("intf %p id %p", intf, id);
634 
635         /* Check number of endpoints */
636         if (intf->cur_altsetting->desc.bNumEndpoints < 2)
637                 return -EIO;
638 
639         bulk_out_ep = &intf->cur_altsetting->endpoint[0];
640         bulk_in_ep  = &intf->cur_altsetting->endpoint[1];
641 
642         if (!bulk_out_ep || !bulk_in_ep) {
643                 BT_ERR("Bulk endpoints not found");
644                 goto done;
645         }
646 
647         /* Initialize control structure and load firmware */
648         data = devm_kzalloc(&intf->dev, sizeof(struct bfusb_data), GFP_KERNEL);
649         if (!data) {
650                 BT_ERR("Can't allocate memory for control structure");
651                 goto done;
652         }
653 
654         data->udev = udev;
655         data->bulk_in_ep    = bulk_in_ep->desc.bEndpointAddress;
656         data->bulk_out_ep   = bulk_out_ep->desc.bEndpointAddress;
657         data->bulk_pkt_size = le16_to_cpu(bulk_out_ep->desc.wMaxPacketSize);
658 
659         rwlock_init(&data->lock);
660 
661         data->reassembly = NULL;
662 
663         skb_queue_head_init(&data->transmit_q);
664         skb_queue_head_init(&data->pending_q);
665         skb_queue_head_init(&data->completed_q);
666 
667         if (request_firmware(&firmware, "bfubase.frm", &udev->dev) < 0) {
668                 BT_ERR("Firmware request failed");
669                 goto done;
670         }
671 
672         BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);
673 
674         if (bfusb_load_firmware(data, firmware->data, firmware->size) < 0) {
675                 BT_ERR("Firmware loading failed");
676                 goto release;
677         }
678 
679         release_firmware(firmware);
680 
681         /* Initialize and register HCI device */
682         hdev = hci_alloc_dev();
683         if (!hdev) {
684                 BT_ERR("Can't allocate HCI device");
685                 goto done;
686         }
687 
688         data->hdev = hdev;
689 
690         hdev->bus = HCI_USB;
691         hci_set_drvdata(hdev, data);
692         SET_HCIDEV_DEV(hdev, &intf->dev);
693 
694         hdev->open  = bfusb_open;
695         hdev->close = bfusb_close;
696         hdev->flush = bfusb_flush;
697         hdev->send  = bfusb_send_frame;
698 
699         if (hci_register_dev(hdev) < 0) {
700                 BT_ERR("Can't register HCI device");
701                 hci_free_dev(hdev);
702                 goto done;
703         }
704 
705         usb_set_intfdata(intf, data);
706 
707         return 0;
708 
709 release:
710         release_firmware(firmware);
711 
712 done:
713         return -EIO;
714 }
715 
716 static void bfusb_disconnect(struct usb_interface *intf)
717 {
718         struct bfusb_data *data = usb_get_intfdata(intf);
719         struct hci_dev *hdev = data->hdev;
720 
721         BT_DBG("intf %p", intf);
722 
723         if (!hdev)
724                 return;
725 
726         usb_set_intfdata(intf, NULL);
727 
728         bfusb_close(hdev);
729 
730         hci_unregister_dev(hdev);
731         hci_free_dev(hdev);
732 }
733 
734 static struct usb_driver bfusb_driver = {
735         .name           = "bfusb",
736         .probe          = bfusb_probe,
737         .disconnect     = bfusb_disconnect,
738         .id_table       = bfusb_table,
739         .disable_hub_initiated_lpm = 1,
740 };
741 
742 module_usb_driver(bfusb_driver);
743 
744 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
745 MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION);
746 MODULE_VERSION(VERSION);
747 MODULE_LICENSE("GPL");
748 MODULE_FIRMWARE("bfubase.frm");
749 

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