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         write_lock_irqsave(&data->lock, flags);
 426
 427         err = bfusb_rx_submit(data, NULL);
 428         if (!err) {
 429                 for (i = 1; i < BFUSB_MAX_BULK_RX; i++)
 430                         bfusb_rx_submit(data, NULL);
 431         }
 432
 433         write_unlock_irqrestore(&data->lock, flags);
 434
 435         return err;
 436 }
 437
 438 static int bfusb_flush(struct hci_dev *hdev)
 439 {
 440         struct bfusb_data *data = hci_get_drvdata(hdev);
 441
 442         BT_DBG("hdev %p bfusb %p", hdev, data);
 443
 444         skb_queue_purge(&data->transmit_q);
 445
 446         return 0;
 447 }
 448
 449 static int bfusb_close(struct hci_dev *hdev)
 450 {
 451         struct bfusb_data *data = hci_get_drvdata(hdev);
 452         unsigned long flags;
 453
 454         BT_DBG("hdev %p bfusb %p", hdev, data);
 455
 456         write_lock_irqsave(&data->lock, flags);
 457         write_unlock_irqrestore(&data->lock, flags);
 458
 459         bfusb_unlink_urbs(data);
 460         bfusb_flush(hdev);
 461
 462         return 0;
 463 }
 464
 465 static int bfusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
 466 {
 467         struct bfusb_data *data = hci_get_drvdata(hdev);
 468         struct sk_buff *nskb;
 469         unsigned char buf[3];
 470         int sent = 0, size, count;
 471
 472         BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, bt_cb(skb)->pkt_type, skb->len);
 473
 474         switch (bt_cb(skb)->pkt_type) {
 475         case HCI_COMMAND_PKT:
 476                 hdev->stat.cmd_tx++;
 477                 break;
 478         case HCI_ACLDATA_PKT:
 479                 hdev->stat.acl_tx++;
 480                 break;
 481         case HCI_SCODATA_PKT:
 482                 hdev->stat.sco_tx++;
 483                 break;
 484         }
 485
 486         /* Prepend skb with frame type */
 487         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
 488
 489         count = skb->len;
 490
 491         /* Max HCI frame size seems to be 1511 + 1 */
 492         nskb = bt_skb_alloc(count + 32, GFP_ATOMIC);
 493         if (!nskb) {
 494                 BT_ERR("Can't allocate memory for new packet");
 495                 return -ENOMEM;
 496         }
 497
 498         nskb->dev = (void *) data;
 499
 500         while (count) {
 501                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE);
 502
 503                 buf[0] = 0xc1 | ((sent == 0) ? 0x04 : 0) | ((count == size) ? 0x08 : 0);
 504                 buf[1] = 0x00;
 505                 buf[2] = (size == BFUSB_MAX_BLOCK_SIZE) ? 0 : size;
 506
 507                 memcpy(skb_put(nskb, 3), buf, 3);
 508                 skb_copy_from_linear_data_offset(skb, sent, skb_put(nskb, size), size);
 509
 510                 sent  += size;
 511                 count -= size;
 512         }
 513
 514         /* Don't send frame with multiple size of bulk max packet */
 515         if ((nskb->len % data->bulk_pkt_size) == 0) {
 516                 buf[0] = 0xdd;
 517                 buf[1] = 0x00;
 518                 memcpy(skb_put(nskb, 2), buf, 2);
 519         }
 520
 521         read_lock(&data->lock);
 522
 523         skb_queue_tail(&data->transmit_q, nskb);
 524         bfusb_tx_wakeup(data);
 525
 526         read_unlock(&data->lock);
 527
 528         kfree_skb(skb);
 529
 530         return 0;
 531 }
 532
 533 static int bfusb_load_firmware(struct bfusb_data *data,
 534                                const unsigned char *firmware, int count)
 535 {
 536         unsigned char *buf;
 537         int err, pipe, len, size, sent = 0;
 538
 539         BT_DBG("bfusb %p udev %p", data, data->udev);
 540
 541         BT_INFO("BlueFRITZ! USB loading firmware");
 542
 543         buf = kmalloc(BFUSB_MAX_BLOCK_SIZE + 3, GFP_KERNEL);
 544         if (!buf) {
 545                 BT_ERR("Can't allocate memory chunk for firmware");
 546                 return -ENOMEM;
 547         }
 548
 549         pipe = usb_sndctrlpipe(data->udev, 0);
 550
 551         if (usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 552                                 0, 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT) < 0) {
 553                 BT_ERR("Can't change to loading configuration");
 554                 kfree(buf);
 555                 return -EBUSY;
 556         }
 557
 558         data->udev->toggle[0] = data->udev->toggle[1] = 0;
 559
 560         pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
 561
 562         while (count) {
 563                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE + 3);
 564
 565                 memcpy(buf, firmware + sent, size);
 566
 567                 err = usb_bulk_msg(data->udev, pipe, buf, size,
 568                                         &len, BFUSB_BLOCK_TIMEOUT);
 569
 570                 if (err || (len != size)) {
 571                         BT_ERR("Error in firmware loading");
 572                         goto error;
 573                 }
 574
 575                 sent  += size;
 576                 count -= size;
 577         }
 578
 579         err = usb_bulk_msg(data->udev, pipe, NULL, 0,
 580                                         &len, BFUSB_BLOCK_TIMEOUT);
 581         if (err < 0) {
 582                 BT_ERR("Error in null packet request");
 583                 goto error;
 584         }
 585
 586         pipe = usb_sndctrlpipe(data->udev, 0);
 587
 588         err = usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 589                                 0, 2, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 590         if (err < 0) {
 591                 BT_ERR("Can't change to running configuration");
 592                 goto error;
 593         }
 594
 595         data->udev->toggle[0] = data->udev->toggle[1] = 0;
 596
 597         BT_INFO("BlueFRITZ! USB device ready");
 598
 599         kfree(buf);
 600         return 0;
 601
 602 error:
 603         kfree(buf);
 604
 605         pipe = usb_sndctrlpipe(data->udev, 0);
 606
 607         usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 608                                 0, 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 609
 610         return err;
 611 }
 612
 613 static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 614 {
 615         const struct firmware *firmware;
 616         struct usb_device *udev = interface_to_usbdev(intf);
 617         struct usb_host_endpoint *bulk_out_ep;
 618         struct usb_host_endpoint *bulk_in_ep;
 619         struct hci_dev *hdev;
 620         struct bfusb_data *data;
 621
 622         BT_DBG("intf %p id %p", intf, id);
 623
 624         /* Check number of endpoints */
 625         if (intf->cur_altsetting->desc.bNumEndpoints < 2)
 626                 return -EIO;
 627
 628         bulk_out_ep = &intf->cur_altsetting->endpoint[0];
 629         bulk_in_ep  = &intf->cur_altsetting->endpoint[1];
 630
 631         if (!bulk_out_ep || !bulk_in_ep) {
 632                 BT_ERR("Bulk endpoints not found");
 633                 goto done;
 634         }
 635
 636         /* Initialize control structure and load firmware */
 637         data = devm_kzalloc(&intf->dev, sizeof(struct bfusb_data), GFP_KERNEL);
 638         if (!data) {
 639                 BT_ERR("Can't allocate memory for control structure");
 640                 goto done;
 641         }
 642
 643         data->udev = udev;
 644         data->bulk_in_ep    = bulk_in_ep->desc.bEndpointAddress;
 645         data->bulk_out_ep   = bulk_out_ep->desc.bEndpointAddress;
 646         data->bulk_pkt_size = le16_to_cpu(bulk_out_ep->desc.wMaxPacketSize);
 647
 648         rwlock_init(&data->lock);
 649
 650         data->reassembly = NULL;
 651
 652         skb_queue_head_init(&data->transmit_q);
 653         skb_queue_head_init(&data->pending_q);
 654         skb_queue_head_init(&data->completed_q);
 655
 656         if (request_firmware(&firmware, "bfubase.frm", &udev->dev) < 0) {
 657                 BT_ERR("Firmware request failed");
 658                 goto done;
 659         }
 660
 661         BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);
 662
 663         if (bfusb_load_firmware(data, firmware->data, firmware->size) < 0) {
 664                 BT_ERR("Firmware loading failed");
 665                 goto release;
 666         }
 667
 668         release_firmware(firmware);
 669
 670         /* Initialize and register HCI device */
 671         hdev = hci_alloc_dev();
 672         if (!hdev) {
 673                 BT_ERR("Can't allocate HCI device");
 674                 goto done;
 675         }
 676
 677         data->hdev = hdev;
 678
 679         hdev->bus = HCI_USB;
 680         hci_set_drvdata(hdev, data);
 681         SET_HCIDEV_DEV(hdev, &intf->dev);
 682
 683         hdev->open  = bfusb_open;
 684         hdev->close = bfusb_close;
 685         hdev->flush = bfusb_flush;
 686         hdev->send  = bfusb_send_frame;
 687
 688         set_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks);
 689
 690         if (hci_register_dev(hdev) < 0) {
 691                 BT_ERR("Can't register HCI device");
 692                 hci_free_dev(hdev);
 693                 goto done;
 694         }
 695
 696         usb_set_intfdata(intf, data);
 697
 698         return 0;
 699
 700 release:
 701         release_firmware(firmware);
 702
 703 done:
 704         return -EIO;
 705 }
 706
 707 static void bfusb_disconnect(struct usb_interface *intf)
 708 {
 709         struct bfusb_data *data = usb_get_intfdata(intf);
 710         struct hci_dev *hdev = data->hdev;
 711
 712         BT_DBG("intf %p", intf);
 713
 714         if (!hdev)
 715                 return;
 716
 717         usb_set_intfdata(intf, NULL);
 718
 719         bfusb_close(hdev);
 720
 721         hci_unregister_dev(hdev);
 722         hci_free_dev(hdev);
 723 }
 724
 725 static struct usb_driver bfusb_driver = {
 726         .name           = "bfusb",
 727         .probe          = bfusb_probe,
 728         .disconnect     = bfusb_disconnect,
 729         .id_table       = bfusb_table,
 730         .disable_hub_initiated_lpm = 1,
 731 };
 732
 733 module_usb_driver(bfusb_driver);
 734
 735 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 736 MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION);
 737 MODULE_VERSION(VERSION);
 738 MODULE_LICENSE("GPL");
 739 MODULE_FIRMWARE("bfubase.frm");