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 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 && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
 135                 return -ENOMEM;
 136
 137         pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
 138
 139         usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, skb->len,
 140                         bfusb_tx_complete, skb);
 141
 142         scb->urb = urb;
 143
 144         skb_queue_tail(&data->pending_q, skb);
 145
 146         err = usb_submit_urb(urb, GFP_ATOMIC);
 147         if (err) {
 148                 BT_ERR("%s bulk tx submit failed urb %p err %d",
 149                                         data->hdev->name, urb, err);
 150                 skb_unlink(skb, &data->pending_q);
 151                 usb_free_urb(urb);
 152         } else
 153                 atomic_inc(&data->pending_tx);
 154
 155         return err;
 156 }
 157
 158 static void bfusb_tx_wakeup(struct bfusb_data *data)
 159 {
 160         struct sk_buff *skb;
 161
 162         BT_DBG("bfusb %p", data);
 163
 164         if (test_and_set_bit(BFUSB_TX_PROCESS, &data->state)) {
 165                 set_bit(BFUSB_TX_WAKEUP, &data->state);
 166                 return;
 167         }
 168
 169         do {
 170                 clear_bit(BFUSB_TX_WAKEUP, &data->state);
 171
 172                 while ((atomic_read(&data->pending_tx) < BFUSB_MAX_BULK_TX) &&
 173                                 (skb = skb_dequeue(&data->transmit_q))) {
 174                         if (bfusb_send_bulk(data, skb) < 0) {
 175                                 skb_queue_head(&data->transmit_q, skb);
 176                                 break;
 177                         }
 178                 }
 179
 180         } while (test_bit(BFUSB_TX_WAKEUP, &data->state));
 181
 182         clear_bit(BFUSB_TX_PROCESS, &data->state);
 183 }
 184
 185 static void bfusb_tx_complete(struct urb *urb)
 186 {
 187         struct sk_buff *skb = (struct sk_buff *) urb->context;
 188         struct bfusb_data *data = (struct bfusb_data *) skb->dev;
 189
 190         BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
 191
 192         atomic_dec(&data->pending_tx);
 193
 194         if (!test_bit(HCI_RUNNING, &data->hdev->flags))
 195                 return;
 196
 197         if (!urb->status)
 198                 data->hdev->stat.byte_tx += skb->len;
 199         else
 200                 data->hdev->stat.err_tx++;
 201
 202         read_lock(&data->lock);
 203
 204         skb_unlink(skb, &data->pending_q);
 205         skb_queue_tail(&data->completed_q, skb);
 206
 207         bfusb_tx_wakeup(data);
 208
 209         read_unlock(&data->lock);
 210 }
 211
 212
 213 static int bfusb_rx_submit(struct bfusb_data *data, struct urb *urb)
 214 {
 215         struct bfusb_data_scb *scb;
 216         struct sk_buff *skb;
 217         int err, pipe, size = HCI_MAX_FRAME_SIZE + 32;
 218
 219         BT_DBG("bfusb %p urb %p", data, urb);
 220
 221         if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
 222                 return -ENOMEM;
 223
 224         skb = bt_skb_alloc(size, GFP_ATOMIC);
 225         if (!skb) {
 226                 usb_free_urb(urb);
 227                 return -ENOMEM;
 228         }
 229
 230         skb->dev = (void *) data;
 231
 232         scb = (struct bfusb_data_scb *) skb->cb;
 233         scb->urb = urb;
 234
 235         pipe = usb_rcvbulkpipe(data->udev, data->bulk_in_ep);
 236
 237         usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, size,
 238                         bfusb_rx_complete, skb);
 239
 240         skb_queue_tail(&data->pending_q, skb);
 241
 242         err = usb_submit_urb(urb, GFP_ATOMIC);
 243         if (err) {
 244                 BT_ERR("%s bulk rx submit failed urb %p err %d",
 245                                         data->hdev->name, urb, err);
 246                 skb_unlink(skb, &data->pending_q);
 247                 kfree_skb(skb);
 248                 usb_free_urb(urb);
 249         }
 250
 251         return err;
 252 }
 253
 254 static inline int bfusb_recv_block(struct bfusb_data *data, int hdr, unsigned char *buf, int len)
 255 {
 256         BT_DBG("bfusb %p hdr 0x%02x data %p len %d", data, hdr, buf, len);
 257
 258         if (hdr & 0x10) {
 259                 BT_ERR("%s error in block", data->hdev->name);
 260                 kfree_skb(data->reassembly);
 261                 data->reassembly = NULL;
 262                 return -EIO;
 263         }
 264
 265         if (hdr & 0x04) {
 266                 struct sk_buff *skb;
 267                 unsigned char pkt_type;
 268                 int pkt_len = 0;
 269
 270                 if (data->reassembly) {
 271                         BT_ERR("%s unexpected start block", data->hdev->name);
 272                         kfree_skb(data->reassembly);
 273                         data->reassembly = NULL;
 274                 }
 275
 276                 if (len < 1) {
 277                         BT_ERR("%s no packet type found", data->hdev->name);
 278                         return -EPROTO;
 279                 }
 280
 281                 pkt_type = *buf++; len--;
 282
 283                 switch (pkt_type) {
 284                 case HCI_EVENT_PKT:
 285                         if (len >= HCI_EVENT_HDR_SIZE) {
 286                                 struct hci_event_hdr *hdr = (struct hci_event_hdr *) buf;
 287                                 pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen;
 288                         } else {
 289                                 BT_ERR("%s event block is too short", data->hdev->name);
 290                                 return -EILSEQ;
 291                         }
 292                         break;
 293
 294                 case HCI_ACLDATA_PKT:
 295                         if (len >= HCI_ACL_HDR_SIZE) {
 296                                 struct hci_acl_hdr *hdr = (struct hci_acl_hdr *) buf;
 297                                 pkt_len = HCI_ACL_HDR_SIZE + __le16_to_cpu(hdr->dlen);
 298                         } else {
 299                                 BT_ERR("%s data block is too short", data->hdev->name);
 300                                 return -EILSEQ;
 301                         }
 302                         break;
 303
 304                 case HCI_SCODATA_PKT:
 305                         if (len >= HCI_SCO_HDR_SIZE) {
 306                                 struct hci_sco_hdr *hdr = (struct hci_sco_hdr *) buf;
 307                                 pkt_len = HCI_SCO_HDR_SIZE + hdr->dlen;
 308                         } else {
 309                                 BT_ERR("%s audio block is too short", data->hdev->name);
 310                                 return -EILSEQ;
 311                         }
 312                         break;
 313                 }
 314
 315                 skb = bt_skb_alloc(pkt_len, GFP_ATOMIC);
 316                 if (!skb) {
 317                         BT_ERR("%s no memory for the packet", data->hdev->name);
 318                         return -ENOMEM;
 319                 }
 320
 321                 skb->dev = (void *) data->hdev;
 322                 bt_cb(skb)->pkt_type = pkt_type;
 323
 324                 data->reassembly = skb;
 325         } else {
 326                 if (!data->reassembly) {
 327                         BT_ERR("%s unexpected continuation block", data->hdev->name);
 328                         return -EIO;
 329                 }
 330         }
 331
 332         if (len > 0)
 333                 memcpy(skb_put(data->reassembly, len), buf, len);
 334
 335         if (hdr & 0x08) {
 336                 hci_recv_frame(data->reassembly);
 337                 data->reassembly = NULL;
 338         }
 339
 340         return 0;
 341 }
 342
 343 static void bfusb_rx_complete(struct urb *urb)
 344 {
 345         struct sk_buff *skb = (struct sk_buff *) urb->context;
 346         struct bfusb_data *data = (struct bfusb_data *) skb->dev;
 347         unsigned char *buf = urb->transfer_buffer;
 348         int count = urb->actual_length;
 349         int err, hdr, len;
 350
 351         BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
 352
 353         read_lock(&data->lock);
 354
 355         if (!test_bit(HCI_RUNNING, &data->hdev->flags))
 356                 goto unlock;
 357
 358         if (urb->status || !count)
 359                 goto resubmit;
 360
 361         data->hdev->stat.byte_rx += count;
 362
 363         skb_put(skb, count);
 364
 365         while (count) {
 366                 hdr = buf[0] | (buf[1] << 8);
 367
 368                 if (hdr & 0x4000) {
 369                         len = 0;
 370                         count -= 2;
 371                         buf   += 2;
 372                 } else {
 373                         len = (buf[2] == 0) ? 256 : buf[2];
 374                         count -= 3;
 375                         buf   += 3;
 376                 }
 377
 378                 if (count < len) {
 379                         BT_ERR("%s block extends over URB buffer ranges",
 380                                         data->hdev->name);
 381                 }
 382
 383                 if ((hdr & 0xe1) == 0xc1)
 384                         bfusb_recv_block(data, hdr, buf, len);
 385
 386                 count -= len;
 387                 buf   += len;
 388         }
 389
 390         skb_unlink(skb, &data->pending_q);
 391         kfree_skb(skb);
 392
 393         bfusb_rx_submit(data, urb);
 394
 395         read_unlock(&data->lock);
 396
 397         return;
 398
 399 resubmit:
 400         urb->dev = data->udev;
 401
 402         err = usb_submit_urb(urb, GFP_ATOMIC);
 403         if (err) {
 404                 BT_ERR("%s bulk resubmit failed urb %p err %d",
 405                                         data->hdev->name, urb, err);
 406         }
 407
 408 unlock:
 409         read_unlock(&data->lock);
 410 }
 411
 412 static int bfusb_open(struct hci_dev *hdev)
 413 {
 414         struct bfusb_data *data = hci_get_drvdata(hdev);
 415         unsigned long flags;
 416         int i, err;
 417
 418         BT_DBG("hdev %p bfusb %p", hdev, data);
 419
 420         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
 421                 return 0;
 422
 423         write_lock_irqsave(&data->lock, flags);
 424
 425         err = bfusb_rx_submit(data, NULL);
 426         if (!err) {
 427                 for (i = 1; i < BFUSB_MAX_BULK_RX; i++)
 428                         bfusb_rx_submit(data, NULL);
 429         } else {
 430                 clear_bit(HCI_RUNNING, &hdev->flags);
 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         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 457                 return 0;
 458
 459         write_lock_irqsave(&data->lock, flags);
 460         write_unlock_irqrestore(&data->lock, flags);
 461
 462         bfusb_unlink_urbs(data);
 463         bfusb_flush(hdev);
 464
 465         return 0;
 466 }
 467
 468 static int bfusb_send_frame(struct sk_buff *skb)
 469 {
 470         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 471         struct bfusb_data *data;
 472         struct sk_buff *nskb;
 473         unsigned char buf[3];
 474         int sent = 0, size, count;
 475
 476         BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, bt_cb(skb)->pkt_type, skb->len);
 477
 478         if (!hdev) {
 479                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
 480                 return -ENODEV;
 481         }
 482
 483         if (!test_bit(HCI_RUNNING, &hdev->flags))
 484                 return -EBUSY;
 485
 486         data = hci_get_drvdata(hdev);
 487
 488         switch (bt_cb(skb)->pkt_type) {
 489         case HCI_COMMAND_PKT:
 490                 hdev->stat.cmd_tx++;
 491                 break;
 492         case HCI_ACLDATA_PKT:
 493                 hdev->stat.acl_tx++;
 494                 break;
 495         case HCI_SCODATA_PKT:
 496                 hdev->stat.sco_tx++;
 497                 break;
 498         };
 499
 500         /* Prepend skb with frame type */
 501         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
 502
 503         count = skb->len;
 504
 505         /* Max HCI frame size seems to be 1511 + 1 */
 506         nskb = bt_skb_alloc(count + 32, GFP_ATOMIC);
 507         if (!nskb) {
 508                 BT_ERR("Can't allocate memory for new packet");
 509                 return -ENOMEM;
 510         }
 511
 512         nskb->dev = (void *) data;
 513
 514         while (count) {
 515                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE);
 516
 517                 buf[0] = 0xc1 | ((sent == 0) ? 0x04 : 0) | ((count == size) ? 0x08 : 0);
 518                 buf[1] = 0x00;
 519                 buf[2] = (size == BFUSB_MAX_BLOCK_SIZE) ? 0 : size;
 520
 521                 memcpy(skb_put(nskb, 3), buf, 3);
 522                 skb_copy_from_linear_data_offset(skb, sent, skb_put(nskb, size), size);
 523
 524                 sent  += size;
 525                 count -= size;
 526         }
 527
 528         /* Don't send frame with multiple size of bulk max packet */
 529         if ((nskb->len % data->bulk_pkt_size) == 0) {
 530                 buf[0] = 0xdd;
 531                 buf[1] = 0x00;
 532                 memcpy(skb_put(nskb, 2), buf, 2);
 533         }
 534
 535         read_lock(&data->lock);
 536
 537         skb_queue_tail(&data->transmit_q, nskb);
 538         bfusb_tx_wakeup(data);
 539
 540         read_unlock(&data->lock);
 541
 542         kfree_skb(skb);
 543
 544         return 0;
 545 }
 546
 547 static int bfusb_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
 548 {
 549         return -ENOIOCTLCMD;
 550 }
 551
 552 static int bfusb_load_firmware(struct bfusb_data *data,
 553                                const unsigned char *firmware, int count)
 554 {
 555         unsigned char *buf;
 556         int err, pipe, len, size, sent = 0;
 557
 558         BT_DBG("bfusb %p udev %p", data, data->udev);
 559
 560         BT_INFO("BlueFRITZ! USB loading firmware");
 561
 562         buf = kmalloc(BFUSB_MAX_BLOCK_SIZE + 3, GFP_KERNEL);
 563         if (!buf) {
 564                 BT_ERR("Can't allocate memory chunk for firmware");
 565                 return -ENOMEM;
 566         }
 567
 568         pipe = usb_sndctrlpipe(data->udev, 0);
 569
 570         if (usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 571                                 0, 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT) < 0) {
 572                 BT_ERR("Can't change to loading configuration");
 573                 kfree(buf);
 574                 return -EBUSY;
 575         }
 576
 577         data->udev->toggle[0] = data->udev->toggle[1] = 0;
 578
 579         pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
 580
 581         while (count) {
 582                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE + 3);
 583
 584                 memcpy(buf, firmware + sent, size);
 585
 586                 err = usb_bulk_msg(data->udev, pipe, buf, size,
 587                                         &len, BFUSB_BLOCK_TIMEOUT);
 588
 589                 if (err || (len != size)) {
 590                         BT_ERR("Error in firmware loading");
 591                         goto error;
 592                 }
 593
 594                 sent  += size;
 595                 count -= size;
 596         }
 597
 598         err = usb_bulk_msg(data->udev, pipe, NULL, 0,
 599                                         &len, BFUSB_BLOCK_TIMEOUT);
 600         if (err < 0) {
 601                 BT_ERR("Error in null packet request");
 602                 goto error;
 603         }
 604
 605         pipe = usb_sndctrlpipe(data->udev, 0);
 606
 607         err = usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 608                                 0, 2, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 609         if (err < 0) {
 610                 BT_ERR("Can't change to running configuration");
 611                 goto error;
 612         }
 613
 614         data->udev->toggle[0] = data->udev->toggle[1] = 0;
 615
 616         BT_INFO("BlueFRITZ! USB device ready");
 617
 618         kfree(buf);
 619         return 0;
 620
 621 error:
 622         kfree(buf);
 623
 624         pipe = usb_sndctrlpipe(data->udev, 0);
 625
 626         usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 627                                 0, 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 628
 629         return err;
 630 }
 631
 632 static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 633 {
 634         const struct firmware *firmware;
 635         struct usb_device *udev = interface_to_usbdev(intf);
 636         struct usb_host_endpoint *bulk_out_ep;
 637         struct usb_host_endpoint *bulk_in_ep;
 638         struct hci_dev *hdev;
 639         struct bfusb_data *data;
 640
 641         BT_DBG("intf %p id %p", intf, id);
 642
 643         /* Check number of endpoints */
 644         if (intf->cur_altsetting->desc.bNumEndpoints < 2)
 645                 return -EIO;
 646
 647         bulk_out_ep = &intf->cur_altsetting->endpoint[0];
 648         bulk_in_ep  = &intf->cur_altsetting->endpoint[1];
 649
 650         if (!bulk_out_ep || !bulk_in_ep) {
 651                 BT_ERR("Bulk endpoints not found");
 652                 goto done;
 653         }
 654
 655         /* Initialize control structure and load firmware */
 656         data = devm_kzalloc(&intf->dev, sizeof(struct bfusb_data), GFP_KERNEL);
 657         if (!data) {
 658                 BT_ERR("Can't allocate memory for control structure");
 659                 goto done;
 660         }
 661
 662         data->udev = udev;
 663         data->bulk_in_ep    = bulk_in_ep->desc.bEndpointAddress;
 664         data->bulk_out_ep   = bulk_out_ep->desc.bEndpointAddress;
 665         data->bulk_pkt_size = le16_to_cpu(bulk_out_ep->desc.wMaxPacketSize);
 666
 667         rwlock_init(&data->lock);
 668
 669         data->reassembly = NULL;
 670
 671         skb_queue_head_init(&data->transmit_q);
 672         skb_queue_head_init(&data->pending_q);
 673         skb_queue_head_init(&data->completed_q);
 674
 675         if (request_firmware(&firmware, "bfubase.frm", &udev->dev) < 0) {
 676                 BT_ERR("Firmware request failed");
 677                 goto done;
 678         }
 679
 680         BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);
 681
 682         if (bfusb_load_firmware(data, firmware->data, firmware->size) < 0) {
 683                 BT_ERR("Firmware loading failed");
 684                 goto release;
 685         }
 686
 687         release_firmware(firmware);
 688
 689         /* Initialize and register HCI device */
 690         hdev = hci_alloc_dev();
 691         if (!hdev) {
 692                 BT_ERR("Can't allocate HCI device");
 693                 goto done;
 694         }
 695
 696         data->hdev = hdev;
 697
 698         hdev->bus = HCI_USB;
 699         hci_set_drvdata(hdev, data);
 700         SET_HCIDEV_DEV(hdev, &intf->dev);
 701
 702         hdev->open     = bfusb_open;
 703         hdev->close    = bfusb_close;
 704         hdev->flush    = bfusb_flush;
 705         hdev->send     = bfusb_send_frame;
 706         hdev->ioctl    = bfusb_ioctl;
 707
 708         if (hci_register_dev(hdev) < 0) {
 709                 BT_ERR("Can't register HCI device");
 710                 hci_free_dev(hdev);
 711                 goto done;
 712         }
 713
 714         usb_set_intfdata(intf, data);
 715
 716         return 0;
 717
 718 release:
 719         release_firmware(firmware);
 720
 721 done:
 722         return -EIO;
 723 }
 724
 725 static void bfusb_disconnect(struct usb_interface *intf)
 726 {
 727         struct bfusb_data *data = usb_get_intfdata(intf);
 728         struct hci_dev *hdev = data->hdev;
 729
 730         BT_DBG("intf %p", intf);
 731
 732         if (!hdev)
 733                 return;
 734
 735         usb_set_intfdata(intf, NULL);
 736
 737         bfusb_close(hdev);
 738
 739         hci_unregister_dev(hdev);
 740         hci_free_dev(hdev);
 741 }
 742
 743 static struct usb_driver bfusb_driver = {
 744         .name           = "bfusb",
 745         .probe          = bfusb_probe,
 746         .disconnect     = bfusb_disconnect,
 747         .id_table       = bfusb_table,
 748         .disable_hub_initiated_lpm = 1,
 749 };
 750
 751 module_usb_driver(bfusb_driver);
 752
 753 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 754 MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION);
 755 MODULE_VERSION(VERSION);
 756 MODULE_LICENSE("GPL");
 757 MODULE_FIRMWARE("bfubase.frm");