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/sched.h>
  31 #include <linux/errno.h>
  32 #include <linux/skbuff.h>
  33
  34 #include <linux/device.h>
  35 #include <linux/firmware.h>
  36
  37 #include <linux/usb.h>
  38
  39 #include <net/bluetooth/bluetooth.h>
  40 #include <net/bluetooth/hci_core.h>
  41
  42 #ifndef CONFIG_BT_HCIBFUSB_DEBUG
  43 #undef  BT_DBG
  44 #define BT_DBG(D...)
  45 #endif
  46
  47 #define VERSION "1.1"
  48
  49 static int ignore = 0;
  50
  51 static struct usb_driver bfusb_driver;
  52
  53 static struct usb_device_id bfusb_table[] = {
  54         /* AVM BlueFRITZ! USB */
  55         { USB_DEVICE(0x057c, 0x2200) },
  56
  57         { }     /* Terminating entry */
  58 };
  59
  60 MODULE_DEVICE_TABLE(usb, bfusb_table);
  61
  62 #define BFUSB_MAX_BLOCK_SIZE    256
  63
  64 #define BFUSB_BLOCK_TIMEOUT     3000
  65
  66 #define BFUSB_TX_PROCESS        1
  67 #define BFUSB_TX_WAKEUP         2
  68
  69 #define BFUSB_MAX_BULK_TX       2
  70 #define BFUSB_MAX_BULK_RX       2
  71
  72 struct bfusb_data {
  73         struct hci_dev          *hdev;
  74
  75         unsigned long           state;
  76
  77         struct usb_device       *udev;
  78
  79         unsigned int            bulk_in_ep;
  80         unsigned int            bulk_out_ep;
  81         unsigned int            bulk_pkt_size;
  82
  83         rwlock_t                lock;
  84
  85         struct sk_buff_head     transmit_q;
  86
  87         struct sk_buff          *reassembly;
  88
  89         atomic_t                pending_tx;
  90         struct sk_buff_head     pending_q;
  91         struct sk_buff_head     completed_q;
  92 };
  93
  94 struct bfusb_data_scb {
  95         struct urb *urb;
  96 };
  97
  98 static void bfusb_tx_complete(struct urb *urb);
  99 static void bfusb_rx_complete(struct urb *urb);
 100
 101 static struct urb *bfusb_get_completed(struct bfusb_data *data)
 102 {
 103         struct sk_buff *skb;
 104         struct urb *urb = NULL;
 105
 106         BT_DBG("bfusb %p", data);
 107
 108         skb = skb_dequeue(&data->completed_q);
 109         if (skb) {
 110                 urb = ((struct bfusb_data_scb *) skb->cb)->urb;
 111                 kfree_skb(skb);
 112         }
 113
 114         return urb;
 115 }
 116
 117 static void bfusb_unlink_urbs(struct bfusb_data *data)
 118 {
 119         struct sk_buff *skb;
 120         struct urb *urb;
 121
 122         BT_DBG("bfusb %p", data);
 123
 124         while ((skb = skb_dequeue(&data->pending_q))) {
 125                 urb = ((struct bfusb_data_scb *) skb->cb)->urb;
 126                 usb_kill_urb(urb);
 127                 skb_queue_tail(&data->completed_q, skb);
 128         }
 129
 130         while ((urb = bfusb_get_completed(data)))
 131                 usb_free_urb(urb);
 132 }
 133
 134 static int bfusb_send_bulk(struct bfusb_data *data, struct sk_buff *skb)
 135 {
 136         struct bfusb_data_scb *scb = (void *) skb->cb;
 137         struct urb *urb = bfusb_get_completed(data);
 138         int err, pipe;
 139
 140         BT_DBG("bfusb %p skb %p len %d", data, skb, skb->len);
 141
 142         if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
 143                 return -ENOMEM;
 144
 145         pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
 146
 147         usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, skb->len,
 148                         bfusb_tx_complete, skb);
 149
 150         scb->urb = urb;
 151
 152         skb_queue_tail(&data->pending_q, skb);
 153
 154         err = usb_submit_urb(urb, GFP_ATOMIC);
 155         if (err) {
 156                 BT_ERR("%s bulk tx submit failed urb %p err %d",
 157                                         data->hdev->name, urb, err);
 158                 skb_unlink(skb, &data->pending_q);
 159                 usb_free_urb(urb);
 160         } else
 161                 atomic_inc(&data->pending_tx);
 162
 163         return err;
 164 }
 165
 166 static void bfusb_tx_wakeup(struct bfusb_data *data)
 167 {
 168         struct sk_buff *skb;
 169
 170         BT_DBG("bfusb %p", data);
 171
 172         if (test_and_set_bit(BFUSB_TX_PROCESS, &data->state)) {
 173                 set_bit(BFUSB_TX_WAKEUP, &data->state);
 174                 return;
 175         }
 176
 177         do {
 178                 clear_bit(BFUSB_TX_WAKEUP, &data->state);
 179
 180                 while ((atomic_read(&data->pending_tx) < BFUSB_MAX_BULK_TX) &&
 181                                 (skb = skb_dequeue(&data->transmit_q))) {
 182                         if (bfusb_send_bulk(data, skb) < 0) {
 183                                 skb_queue_head(&data->transmit_q, skb);
 184                                 break;
 185                         }
 186                 }
 187
 188         } while (test_bit(BFUSB_TX_WAKEUP, &data->state));
 189
 190         clear_bit(BFUSB_TX_PROCESS, &data->state);
 191 }
 192
 193 static void bfusb_tx_complete(struct urb *urb)
 194 {
 195         struct sk_buff *skb = (struct sk_buff *) urb->context;
 196         struct bfusb_data *data = (struct bfusb_data *) skb->dev;
 197
 198         BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
 199
 200         atomic_dec(&data->pending_tx);
 201
 202         if (!test_bit(HCI_RUNNING, &data->hdev->flags))
 203                 return;
 204
 205         if (!urb->status)
 206                 data->hdev->stat.byte_tx += skb->len;
 207         else
 208                 data->hdev->stat.err_tx++;
 209
 210         read_lock(&data->lock);
 211
 212         skb_unlink(skb, &data->pending_q);
 213         skb_queue_tail(&data->completed_q, skb);
 214
 215         bfusb_tx_wakeup(data);
 216
 217         read_unlock(&data->lock);
 218 }
 219
 220
 221 static int bfusb_rx_submit(struct bfusb_data *data, struct urb *urb)
 222 {
 223         struct bfusb_data_scb *scb;
 224         struct sk_buff *skb;
 225         int err, pipe, size = HCI_MAX_FRAME_SIZE + 32;
 226
 227         BT_DBG("bfusb %p urb %p", bfusb, urb);
 228
 229         if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
 230                 return -ENOMEM;
 231
 232         skb = bt_skb_alloc(size, GFP_ATOMIC);
 233         if (!skb) {
 234                 usb_free_urb(urb);
 235                 return -ENOMEM;
 236         }
 237
 238         skb->dev = (void *) data;
 239
 240         scb = (struct bfusb_data_scb *) skb->cb;
 241         scb->urb = urb;
 242
 243         pipe = usb_rcvbulkpipe(data->udev, data->bulk_in_ep);
 244
 245         usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, size,
 246                         bfusb_rx_complete, skb);
 247
 248         skb_queue_tail(&data->pending_q, skb);
 249
 250         err = usb_submit_urb(urb, GFP_ATOMIC);
 251         if (err) {
 252                 BT_ERR("%s bulk rx submit failed urb %p err %d",
 253                                         data->hdev->name, urb, err);
 254                 skb_unlink(skb, &data->pending_q);
 255                 kfree_skb(skb);
 256                 usb_free_urb(urb);
 257         }
 258
 259         return err;
 260 }
 261
 262 static inline int bfusb_recv_block(struct bfusb_data *data, int hdr, unsigned char *buf, int len)
 263 {
 264         BT_DBG("bfusb %p hdr 0x%02x data %p len %d", data, hdr, buf, len);
 265
 266         if (hdr & 0x10) {
 267                 BT_ERR("%s error in block", data->hdev->name);
 268                 if (data->reassembly)
 269                         kfree_skb(data->reassembly);
 270                 data->reassembly = NULL;
 271                 return -EIO;
 272         }
 273
 274         if (hdr & 0x04) {
 275                 struct sk_buff *skb;
 276                 unsigned char pkt_type;
 277                 int pkt_len = 0;
 278
 279                 if (data->reassembly) {
 280                         BT_ERR("%s unexpected start block", data->hdev->name);
 281                         kfree_skb(data->reassembly);
 282                         data->reassembly = NULL;
 283                 }
 284
 285                 if (len < 1) {
 286                         BT_ERR("%s no packet type found", data->hdev->name);
 287                         return -EPROTO;
 288                 }
 289
 290                 pkt_type = *buf++; len--;
 291
 292                 switch (pkt_type) {
 293                 case HCI_EVENT_PKT:
 294                         if (len >= HCI_EVENT_HDR_SIZE) {
 295                                 struct hci_event_hdr *hdr = (struct hci_event_hdr *) buf;
 296                                 pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen;
 297                         } else {
 298                                 BT_ERR("%s event block is too short", data->hdev->name);
 299                                 return -EILSEQ;
 300                         }
 301                         break;
 302
 303                 case HCI_ACLDATA_PKT:
 304                         if (len >= HCI_ACL_HDR_SIZE) {
 305                                 struct hci_acl_hdr *hdr = (struct hci_acl_hdr *) buf;
 306                                 pkt_len = HCI_ACL_HDR_SIZE + __le16_to_cpu(hdr->dlen);
 307                         } else {
 308                                 BT_ERR("%s data block is too short", data->hdev->name);
 309                                 return -EILSEQ;
 310                         }
 311                         break;
 312
 313                 case HCI_SCODATA_PKT:
 314                         if (len >= HCI_SCO_HDR_SIZE) {
 315                                 struct hci_sco_hdr *hdr = (struct hci_sco_hdr *) buf;
 316                                 pkt_len = HCI_SCO_HDR_SIZE + hdr->dlen;
 317                         } else {
 318                                 BT_ERR("%s audio block is too short", data->hdev->name);
 319                                 return -EILSEQ;
 320                         }
 321                         break;
 322                 }
 323
 324                 skb = bt_skb_alloc(pkt_len, GFP_ATOMIC);
 325                 if (!skb) {
 326                         BT_ERR("%s no memory for the packet", data->hdev->name);
 327                         return -ENOMEM;
 328                 }
 329
 330                 skb->dev = (void *) data->hdev;
 331                 bt_cb(skb)->pkt_type = pkt_type;
 332
 333                 data->reassembly = skb;
 334         } else {
 335                 if (!data->reassembly) {
 336                         BT_ERR("%s unexpected continuation block", data->hdev->name);
 337                         return -EIO;
 338                 }
 339         }
 340
 341         if (len > 0)
 342                 memcpy(skb_put(data->reassembly, len), buf, len);
 343
 344         if (hdr & 0x08) {
 345                 hci_recv_frame(data->reassembly);
 346                 data->reassembly = NULL;
 347         }
 348
 349         return 0;
 350 }
 351
 352 static void bfusb_rx_complete(struct urb *urb)
 353 {
 354         struct sk_buff *skb = (struct sk_buff *) urb->context;
 355         struct bfusb_data *data = (struct bfusb_data *) skb->dev;
 356         unsigned char *buf = urb->transfer_buffer;
 357         int count = urb->actual_length;
 358         int err, hdr, len;
 359
 360         BT_DBG("bfusb %p urb %p skb %p len %d", bfusb, urb, skb, skb->len);
 361
 362         read_lock(&data->lock);
 363
 364         if (!test_bit(HCI_RUNNING, &data->hdev->flags))
 365                 goto unlock;
 366
 367         if (urb->status || !count)
 368                 goto resubmit;
 369
 370         data->hdev->stat.byte_rx += count;
 371
 372         skb_put(skb, count);
 373
 374         while (count) {
 375                 hdr = buf[0] | (buf[1] << 8);
 376
 377                 if (hdr & 0x4000) {
 378                         len = 0;
 379                         count -= 2;
 380                         buf   += 2;
 381                 } else {
 382                         len = (buf[2] == 0) ? 256 : buf[2];
 383                         count -= 3;
 384                         buf   += 3;
 385                 }
 386
 387                 if (count < len) {
 388                         BT_ERR("%s block extends over URB buffer ranges",
 389                                         data->hdev->name);
 390                 }
 391
 392                 if ((hdr & 0xe1) == 0xc1)
 393                         bfusb_recv_block(data, hdr, buf, len);
 394
 395                 count -= len;
 396                 buf   += len;
 397         }
 398
 399         skb_unlink(skb, &data->pending_q);
 400         kfree_skb(skb);
 401
 402         bfusb_rx_submit(data, urb);
 403
 404         read_unlock(&data->lock);
 405
 406         return;
 407
 408 resubmit:
 409         urb->dev = data->udev;
 410
 411         err = usb_submit_urb(urb, GFP_ATOMIC);
 412         if (err) {
 413                 BT_ERR("%s bulk resubmit failed urb %p err %d",
 414                                         data->hdev->name, urb, err);
 415         }
 416
 417 unlock:
 418         read_unlock(&data->lock);
 419 }
 420
 421 static int bfusb_open(struct hci_dev *hdev)
 422 {
 423         struct bfusb_data *data = hdev->driver_data;
 424         unsigned long flags;
 425         int i, err;
 426
 427         BT_DBG("hdev %p bfusb %p", hdev, data);
 428
 429         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
 430                 return 0;
 431
 432         write_lock_irqsave(&data->lock, flags);
 433
 434         err = bfusb_rx_submit(data, NULL);
 435         if (!err) {
 436                 for (i = 1; i < BFUSB_MAX_BULK_RX; i++)
 437                         bfusb_rx_submit(data, NULL);
 438         } else {
 439                 clear_bit(HCI_RUNNING, &hdev->flags);
 440         }
 441
 442         write_unlock_irqrestore(&data->lock, flags);
 443
 444         return err;
 445 }
 446
 447 static int bfusb_flush(struct hci_dev *hdev)
 448 {
 449         struct bfusb_data *data = hdev->driver_data;
 450
 451         BT_DBG("hdev %p bfusb %p", hdev, data);
 452
 453         skb_queue_purge(&data->transmit_q);
 454
 455         return 0;
 456 }
 457
 458 static int bfusb_close(struct hci_dev *hdev)
 459 {
 460         struct bfusb_data *data = hdev->driver_data;
 461         unsigned long flags;
 462
 463         BT_DBG("hdev %p bfusb %p", hdev, data);
 464
 465         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 466                 return 0;
 467
 468         write_lock_irqsave(&data->lock, flags);
 469         write_unlock_irqrestore(&data->lock, flags);
 470
 471         bfusb_unlink_urbs(data);
 472         bfusb_flush(hdev);
 473
 474         return 0;
 475 }
 476
 477 static int bfusb_send_frame(struct sk_buff *skb)
 478 {
 479         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 480         struct bfusb_data *data;
 481         struct sk_buff *nskb;
 482         unsigned char buf[3];
 483         int sent = 0, size, count;
 484
 485         BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, bt_cb(skb)->pkt_type, skb->len);
 486
 487         if (!hdev) {
 488                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
 489                 return -ENODEV;
 490         }
 491
 492         if (!test_bit(HCI_RUNNING, &hdev->flags))
 493                 return -EBUSY;
 494
 495         data = hdev->driver_data;
 496
 497         switch (bt_cb(skb)->pkt_type) {
 498         case HCI_COMMAND_PKT:
 499                 hdev->stat.cmd_tx++;
 500                 break;
 501         case HCI_ACLDATA_PKT:
 502                 hdev->stat.acl_tx++;
 503                 break;
 504         case HCI_SCODATA_PKT:
 505                 hdev->stat.sco_tx++;
 506                 break;
 507         };
 508
 509         /* Prepend skb with frame type */
 510         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
 511
 512         count = skb->len;
 513
 514         /* Max HCI frame size seems to be 1511 + 1 */
 515         nskb = bt_skb_alloc(count + 32, GFP_ATOMIC);
 516         if (!nskb) {
 517                 BT_ERR("Can't allocate memory for new packet");
 518                 return -ENOMEM;
 519         }
 520
 521         nskb->dev = (void *) data;
 522
 523         while (count) {
 524                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE);
 525
 526                 buf[0] = 0xc1 | ((sent == 0) ? 0x04 : 0) | ((count == size) ? 0x08 : 0);
 527                 buf[1] = 0x00;
 528                 buf[2] = (size == BFUSB_MAX_BLOCK_SIZE) ? 0 : size;
 529
 530                 memcpy(skb_put(nskb, 3), buf, 3);
 531                 memcpy(skb_put(nskb, size), skb->data + sent, size);
 532
 533                 sent  += size;
 534                 count -= size;
 535         }
 536
 537         /* Don't send frame with multiple size of bulk max packet */
 538         if ((nskb->len % data->bulk_pkt_size) == 0) {
 539                 buf[0] = 0xdd;
 540                 buf[1] = 0x00;
 541                 memcpy(skb_put(nskb, 2), buf, 2);
 542         }
 543
 544         read_lock(&data->lock);
 545
 546         skb_queue_tail(&data->transmit_q, nskb);
 547         bfusb_tx_wakeup(data);
 548
 549         read_unlock(&data->lock);
 550
 551         kfree_skb(skb);
 552
 553         return 0;
 554 }
 555
 556 static void bfusb_destruct(struct hci_dev *hdev)
 557 {
 558         struct bfusb_data *data = hdev->driver_data;
 559
 560         BT_DBG("hdev %p bfusb %p", hdev, data);
 561
 562         kfree(data);
 563 }
 564
 565 static int bfusb_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
 566 {
 567         return -ENOIOCTLCMD;
 568 }
 569
 570 static int bfusb_load_firmware(struct bfusb_data *data, unsigned char *firmware, int count)
 571 {
 572         unsigned char *buf;
 573         int err, pipe, len, size, sent = 0;
 574
 575         BT_DBG("bfusb %p udev %p", data, data->udev);
 576
 577         BT_INFO("BlueFRITZ! USB loading firmware");
 578
 579         pipe = usb_sndctrlpipe(data->udev, 0);
 580
 581         if (usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 582                                 0, 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT) < 0) {
 583                 BT_ERR("Can't change to loading configuration");
 584                 return -EBUSY;
 585         }
 586
 587         data->udev->toggle[0] = data->udev->toggle[1] = 0;
 588
 589         buf = kmalloc(BFUSB_MAX_BLOCK_SIZE + 3, GFP_ATOMIC);
 590         if (!buf) {
 591                 BT_ERR("Can't allocate memory chunk for firmware");
 592                 return -ENOMEM;
 593         }
 594
 595         pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
 596
 597         while (count) {
 598                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE + 3);
 599
 600                 memcpy(buf, firmware + sent, size);
 601
 602                 err = usb_bulk_msg(data->udev, pipe, buf, size,
 603                                         &len, BFUSB_BLOCK_TIMEOUT);
 604
 605                 if (err || (len != size)) {
 606                         BT_ERR("Error in firmware loading");
 607                         goto error;
 608                 }
 609
 610                 sent  += size;
 611                 count -= size;
 612         }
 613
 614         err = usb_bulk_msg(data->udev, pipe, NULL, 0,
 615                                         &len, BFUSB_BLOCK_TIMEOUT);
 616         if (err < 0) {
 617                 BT_ERR("Error in null packet request");
 618                 goto error;
 619         }
 620
 621         pipe = usb_sndctrlpipe(data->udev, 0);
 622
 623         err = usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 624                                 0, 2, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 625         if (err < 0) {
 626                 BT_ERR("Can't change to running configuration");
 627                 goto error;
 628         }
 629
 630         data->udev->toggle[0] = data->udev->toggle[1] = 0;
 631
 632         BT_INFO("BlueFRITZ! USB device ready");
 633
 634         kfree(buf);
 635         return 0;
 636
 637 error:
 638         kfree(buf);
 639
 640         pipe = usb_sndctrlpipe(data->udev, 0);
 641
 642         usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 643                                 0, 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 644
 645         return err;
 646 }
 647
 648 static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 649 {
 650         const struct firmware *firmware;
 651         struct usb_device *udev = interface_to_usbdev(intf);
 652         struct usb_host_endpoint *bulk_out_ep;
 653         struct usb_host_endpoint *bulk_in_ep;
 654         struct hci_dev *hdev;
 655         struct bfusb_data *data;
 656
 657         BT_DBG("intf %p id %p", intf, id);
 658
 659         if (ignore)
 660                 return -ENODEV;
 661
 662         /* Check number of endpoints */
 663         if (intf->cur_altsetting->desc.bNumEndpoints < 2)
 664                 return -EIO;
 665
 666         bulk_out_ep = &intf->cur_altsetting->endpoint[0];
 667         bulk_in_ep  = &intf->cur_altsetting->endpoint[1];
 668
 669         if (!bulk_out_ep || !bulk_in_ep) {
 670                 BT_ERR("Bulk endpoints not found");
 671                 goto done;
 672         }
 673
 674         /* Initialize control structure and load firmware */
 675         data = kzalloc(sizeof(struct bfusb_data), GFP_KERNEL);
 676         if (!data) {
 677                 BT_ERR("Can't allocate memory for control structure");
 678                 goto done;
 679         }
 680
 681         data->udev = udev;
 682         data->bulk_in_ep    = bulk_in_ep->desc.bEndpointAddress;
 683         data->bulk_out_ep   = bulk_out_ep->desc.bEndpointAddress;
 684         data->bulk_pkt_size = le16_to_cpu(bulk_out_ep->desc.wMaxPacketSize);
 685
 686         rwlock_init(&data->lock);
 687
 688         data->reassembly = NULL;
 689
 690         skb_queue_head_init(&data->transmit_q);
 691         skb_queue_head_init(&data->pending_q);
 692         skb_queue_head_init(&data->completed_q);
 693
 694         if (request_firmware(&firmware, "bfubase.frm", &udev->dev) < 0) {
 695                 BT_ERR("Firmware request failed");
 696                 goto error;
 697         }
 698
 699         BT_DBG("firmware data %p size %d", firmware->data, firmware->size);
 700
 701         if (bfusb_load_firmware(data, firmware->data, firmware->size) < 0) {
 702                 BT_ERR("Firmware loading failed");
 703                 goto release;
 704         }
 705
 706         release_firmware(firmware);
 707
 708         /* Initialize and register HCI device */
 709         hdev = hci_alloc_dev();
 710         if (!hdev) {
 711                 BT_ERR("Can't allocate HCI device");
 712                 goto error;
 713         }
 714
 715         data->hdev = hdev;
 716
 717         hdev->type = HCI_USB;
 718         hdev->driver_data = data;
 719         SET_HCIDEV_DEV(hdev, &intf->dev);
 720
 721         hdev->open     = bfusb_open;
 722         hdev->close    = bfusb_close;
 723         hdev->flush    = bfusb_flush;
 724         hdev->send     = bfusb_send_frame;
 725         hdev->destruct = bfusb_destruct;
 726         hdev->ioctl    = bfusb_ioctl;
 727
 728         hdev->owner = THIS_MODULE;
 729
 730         if (hci_register_dev(hdev) < 0) {
 731                 BT_ERR("Can't register HCI device");
 732                 hci_free_dev(hdev);
 733                 goto error;
 734         }
 735
 736         usb_set_intfdata(intf, data);
 737
 738         return 0;
 739
 740 release:
 741         release_firmware(firmware);
 742
 743 error:
 744         kfree(data);
 745
 746 done:
 747         return -EIO;
 748 }
 749
 750 static void bfusb_disconnect(struct usb_interface *intf)
 751 {
 752         struct bfusb_data *data = usb_get_intfdata(intf);
 753         struct hci_dev *hdev = data->hdev;
 754
 755         BT_DBG("intf %p", intf);
 756
 757         if (!hdev)
 758                 return;
 759
 760         usb_set_intfdata(intf, NULL);
 761
 762         bfusb_close(hdev);
 763
 764         if (hci_unregister_dev(hdev) < 0)
 765                 BT_ERR("Can't unregister HCI device %s", hdev->name);
 766
 767         hci_free_dev(hdev);
 768 }
 769
 770 static struct usb_driver bfusb_driver = {
 771         .name           = "bfusb",
 772         .probe          = bfusb_probe,
 773         .disconnect     = bfusb_disconnect,
 774         .id_table       = bfusb_table,
 775 };
 776
 777 static int __init bfusb_init(void)
 778 {
 779         int err;
 780
 781         BT_INFO("BlueFRITZ! USB driver ver %s", VERSION);
 782
 783         err = usb_register(&bfusb_driver);
 784         if (err < 0)
 785                 BT_ERR("Failed to register BlueFRITZ! USB driver");
 786
 787         return err;
 788 }
 789
 790 static void __exit bfusb_exit(void)
 791 {
 792         usb_deregister(&bfusb_driver);
 793 }
 794
 795 module_init(bfusb_init);
 796 module_exit(bfusb_exit);
 797
 798 module_param(ignore, bool, 0644);
 799 MODULE_PARM_DESC(ignore, "Ignore devices from the matching table");
 800
 801 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 802 MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION);
 803 MODULE_VERSION(VERSION);
 804 MODULE_LICENSE("GPL");