git.oblomov.eu Git - linux-2.6/blob - 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                 if (data->reassembly)
 261                         kfree_skb(data->reassembly);
 262                 data->reassembly = NULL;
 263                 return -EIO;
 264         }
 265
 266         if (hdr & 0x04) {
 267                 struct sk_buff *skb;
 268                 unsigned char pkt_type;
 269                 int pkt_len = 0;
 270
 271                 if (data->reassembly) {
 272                         BT_ERR("%s unexpected start block", data->hdev->name);
 273                         kfree_skb(data->reassembly);
 274                         data->reassembly = NULL;
 275                 }
 276
 277                 if (len < 1) {
 278                         BT_ERR("%s no packet type found", data->hdev->name);
 279                         return -EPROTO;
 280                 }
 281
 282                 pkt_type = *buf++; len--;
 283
 284                 switch (pkt_type) {
 285                 case HCI_EVENT_PKT:
 286                         if (len >= HCI_EVENT_HDR_SIZE) {
 287                                 struct hci_event_hdr *hdr = (struct hci_event_hdr *) buf;
 288                                 pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen;
 289                         } else {
 290                                 BT_ERR("%s event block is too short", data->hdev->name);
 291                                 return -EILSEQ;
 292                         }
 293                         break;
 294
 295                 case HCI_ACLDATA_PKT:
 296                         if (len >= HCI_ACL_HDR_SIZE) {
 297                                 struct hci_acl_hdr *hdr = (struct hci_acl_hdr *) buf;
 298                                 pkt_len = HCI_ACL_HDR_SIZE + __le16_to_cpu(hdr->dlen);
 299                         } else {
 300                                 BT_ERR("%s data block is too short", data->hdev->name);
 301                                 return -EILSEQ;
 302                         }
 303                         break;
 304
 305                 case HCI_SCODATA_PKT:
 306                         if (len >= HCI_SCO_HDR_SIZE) {
 307                                 struct hci_sco_hdr *hdr = (struct hci_sco_hdr *) buf;
 308                                 pkt_len = HCI_SCO_HDR_SIZE + hdr->dlen;
 309                         } else {
 310                                 BT_ERR("%s audio block is too short", data->hdev->name);
 311                                 return -EILSEQ;
 312                         }
 313                         break;
 314                 }
 315
 316                 skb = bt_skb_alloc(pkt_len, GFP_ATOMIC);
 317                 if (!skb) {
 318                         BT_ERR("%s no memory for the packet", data->hdev->name);
 319                         return -ENOMEM;
 320                 }
 321
 322                 skb->dev = (void *) data->hdev;
 323                 bt_cb(skb)->pkt_type = pkt_type;
 324
 325                 data->reassembly = skb;
 326         } else {
 327                 if (!data->reassembly) {
 328                         BT_ERR("%s unexpected continuation block", data->hdev->name);
 329                         return -EIO;
 330                 }
 331         }
 332
 333         if (len > 0)
 334                 memcpy(skb_put(data->reassembly, len), buf, len);
 335
 336         if (hdr & 0x08) {
 337                 hci_recv_frame(data->reassembly);
 338                 data->reassembly = NULL;
 339         }
 340
 341         return 0;
 342 }
 343
 344 static void bfusb_rx_complete(struct urb *urb)
 345 {
 346         struct sk_buff *skb = (struct sk_buff *) urb->context;
 347         struct bfusb_data *data = (struct bfusb_data *) skb->dev;
 348         unsigned char *buf = urb->transfer_buffer;
 349         int count = urb->actual_length;
 350         int err, hdr, len;
 351
 352         BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
 353
 354         read_lock(&data->lock);
 355
 356         if (!test_bit(HCI_RUNNING, &data->hdev->flags))
 357                 goto unlock;
 358
 359         if (urb->status || !count)
 360                 goto resubmit;
 361
 362         data->hdev->stat.byte_rx += count;
 363
 364         skb_put(skb, count);
 365
 366         while (count) {
 367                 hdr = buf[0] | (buf[1] << 8);
 368
 369                 if (hdr & 0x4000) {
 370                         len = 0;
 371                         count -= 2;
 372                         buf   += 2;
 373                 } else {
 374                         len = (buf[2] == 0) ? 256 : buf[2];
 375                         count -= 3;
 376                         buf   += 3;
 377                 }
 378
 379                 if (count < len) {
 380                         BT_ERR("%s block extends over URB buffer ranges",
 381                                         data->hdev->name);
 382                 }
 383
 384                 if ((hdr & 0xe1) == 0xc1)
 385                         bfusb_recv_block(data, hdr, buf, len);
 386
 387                 count -= len;
 388                 buf   += len;
 389         }
 390
 391         skb_unlink(skb, &data->pending_q);
 392         kfree_skb(skb);
 393
 394         bfusb_rx_submit(data, urb);
 395
 396         read_unlock(&data->lock);
 397
 398         return;
 399
 400 resubmit:
 401         urb->dev = data->udev;
 402
 403         err = usb_submit_urb(urb, GFP_ATOMIC);
 404         if (err) {
 405                 BT_ERR("%s bulk resubmit failed urb %p err %d",
 406                                         data->hdev->name, urb, err);
 407         }
 408
 409 unlock:
 410         read_unlock(&data->lock);
 411 }
 412
 413 static int bfusb_open(struct hci_dev *hdev)
 414 {
 415         struct bfusb_data *data = hdev->driver_data;
 416         unsigned long flags;
 417         int i, err;
 418
 419         BT_DBG("hdev %p bfusb %p", hdev, data);
 420
 421         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
 422                 return 0;
 423
 424         write_lock_irqsave(&data->lock, flags);
 425
 426         err = bfusb_rx_submit(data, NULL);
 427         if (!err) {
 428                 for (i = 1; i < BFUSB_MAX_BULK_RX; i++)
 429                         bfusb_rx_submit(data, NULL);
 430         } else {
 431                 clear_bit(HCI_RUNNING, &hdev->flags);
 432         }
 433
 434         write_unlock_irqrestore(&data->lock, flags);
 435
 436         return err;
 437 }
 438
 439 static int bfusb_flush(struct hci_dev *hdev)
 440 {
 441         struct bfusb_data *data = hdev->driver_data;
 442
 443         BT_DBG("hdev %p bfusb %p", hdev, data);
 444
 445         skb_queue_purge(&data->transmit_q);
 446
 447         return 0;
 448 }
 449
 450 static int bfusb_close(struct hci_dev *hdev)
 451 {
 452         struct bfusb_data *data = hdev->driver_data;
 453         unsigned long flags;
 454
 455         BT_DBG("hdev %p bfusb %p", hdev, data);
 456
 457         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 458                 return 0;
 459
 460         write_lock_irqsave(&data->lock, flags);
 461         write_unlock_irqrestore(&data->lock, flags);
 462
 463         bfusb_unlink_urbs(data);
 464         bfusb_flush(hdev);
 465
 466         return 0;
 467 }
 468
 469 static int bfusb_send_frame(struct sk_buff *skb)
 470 {
 471         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 472         struct bfusb_data *data;
 473         struct sk_buff *nskb;
 474         unsigned char buf[3];
 475         int sent = 0, size, count;
 476
 477         BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, bt_cb(skb)->pkt_type, skb->len);
 478
 479         if (!hdev) {
 480                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
 481                 return -ENODEV;
 482         }
 483
 484         if (!test_bit(HCI_RUNNING, &hdev->flags))
 485                 return -EBUSY;
 486
 487         data = hdev->driver_data;
 488
 489         switch (bt_cb(skb)->pkt_type) {
 490         case HCI_COMMAND_PKT:
 491                 hdev->stat.cmd_tx++;
 492                 break;
 493         case HCI_ACLDATA_PKT:
 494                 hdev->stat.acl_tx++;
 495                 break;
 496         case HCI_SCODATA_PKT:
 497                 hdev->stat.sco_tx++;
 498                 break;
 499         };
 500
 501         /* Prepend skb with frame type */
 502         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
 503
 504         count = skb->len;
 505
 506         /* Max HCI frame size seems to be 1511 + 1 */
 507         nskb = bt_skb_alloc(count + 32, GFP_ATOMIC);
 508         if (!nskb) {
 509                 BT_ERR("Can't allocate memory for new packet");
 510                 return -ENOMEM;
 511         }
 512
 513         nskb->dev = (void *) data;
 514
 515         while (count) {
 516                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE);
 517
 518                 buf[0] = 0xc1 | ((sent == 0) ? 0x04 : 0) | ((count == size) ? 0x08 : 0);
 519                 buf[1] = 0x00;
 520                 buf[2] = (size == BFUSB_MAX_BLOCK_SIZE) ? 0 : size;
 521
 522                 memcpy(skb_put(nskb, 3), buf, 3);
 523                 skb_copy_from_linear_data_offset(skb, sent, skb_put(nskb, size), size);
 524
 525                 sent  += size;
 526                 count -= size;
 527         }
 528
 529         /* Don't send frame with multiple size of bulk max packet */
 530         if ((nskb->len % data->bulk_pkt_size) == 0) {
 531                 buf[0] = 0xdd;
 532                 buf[1] = 0x00;
 533                 memcpy(skb_put(nskb, 2), buf, 2);
 534         }
 535
 536         read_lock(&data->lock);
 537
 538         skb_queue_tail(&data->transmit_q, nskb);
 539         bfusb_tx_wakeup(data);
 540
 541         read_unlock(&data->lock);
 542
 543         kfree_skb(skb);
 544
 545         return 0;
 546 }
 547
 548 static void bfusb_destruct(struct hci_dev *hdev)
 549 {
 550         struct bfusb_data *data = hdev->driver_data;
 551
 552         BT_DBG("hdev %p bfusb %p", hdev, data);
 553
 554         kfree(data);
 555 }
 556
 557 static int bfusb_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
 558 {
 559         return -ENOIOCTLCMD;
 560 }
 561
 562 static int bfusb_load_firmware(struct bfusb_data *data,
 563                                const unsigned char *firmware, int count)
 564 {
 565         unsigned char *buf;
 566         int err, pipe, len, size, sent = 0;
 567
 568         BT_DBG("bfusb %p udev %p", data, data->udev);
 569
 570         BT_INFO("BlueFRITZ! USB loading firmware");
 571
 572         pipe = usb_sndctrlpipe(data->udev, 0);
 573
 574         if (usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 575                                 0, 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT) < 0) {
 576                 BT_ERR("Can't change to loading configuration");
 577                 return -EBUSY;
 578         }
 579
 580         data->udev->toggle[0] = data->udev->toggle[1] = 0;
 581
 582         buf = kmalloc(BFUSB_MAX_BLOCK_SIZE + 3, GFP_ATOMIC);
 583         if (!buf) {
 584                 BT_ERR("Can't allocate memory chunk for firmware");
 585                 return -ENOMEM;
 586         }
 587
 588         pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
 589
 590         while (count) {
 591                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE + 3);
 592
 593                 memcpy(buf, firmware + sent, size);
 594
 595                 err = usb_bulk_msg(data->udev, pipe, buf, size,
 596                                         &len, BFUSB_BLOCK_TIMEOUT);
 597
 598                 if (err || (len != size)) {
 599                         BT_ERR("Error in firmware loading");
 600                         goto error;
 601                 }
 602
 603                 sent  += size;
 604                 count -= size;
 605         }
 606
 607         err = usb_bulk_msg(data->udev, pipe, NULL, 0,
 608                                         &len, BFUSB_BLOCK_TIMEOUT);
 609         if (err < 0) {
 610                 BT_ERR("Error in null packet request");
 611                 goto error;
 612         }
 613
 614         pipe = usb_sndctrlpipe(data->udev, 0);
 615
 616         err = usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 617                                 0, 2, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 618         if (err < 0) {
 619                 BT_ERR("Can't change to running configuration");
 620                 goto error;
 621         }
 622
 623         data->udev->toggle[0] = data->udev->toggle[1] = 0;
 624
 625         BT_INFO("BlueFRITZ! USB device ready");
 626
 627         kfree(buf);
 628         return 0;
 629
 630 error:
 631         kfree(buf);
 632
 633         pipe = usb_sndctrlpipe(data->udev, 0);
 634
 635         usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 636                                 0, 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 637
 638         return err;
 639 }
 640
 641 static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 642 {
 643         const struct firmware *firmware;
 644         struct usb_device *udev = interface_to_usbdev(intf);
 645         struct usb_host_endpoint *bulk_out_ep;
 646         struct usb_host_endpoint *bulk_in_ep;
 647         struct hci_dev *hdev;
 648         struct bfusb_data *data;
 649
 650         BT_DBG("intf %p id %p", intf, id);
 651
 652         /* Check number of endpoints */
 653         if (intf->cur_altsetting->desc.bNumEndpoints < 2)
 654                 return -EIO;
 655
 656         bulk_out_ep = &intf->cur_altsetting->endpoint[0];
 657         bulk_in_ep  = &intf->cur_altsetting->endpoint[1];
 658
 659         if (!bulk_out_ep || !bulk_in_ep) {
 660                 BT_ERR("Bulk endpoints not found");
 661                 goto done;
 662         }
 663
 664         /* Initialize control structure and load firmware */
 665         data = kzalloc(sizeof(struct bfusb_data), GFP_KERNEL);
 666         if (!data) {
 667                 BT_ERR("Can't allocate memory for control structure");
 668                 goto done;
 669         }
 670
 671         data->udev = udev;
 672         data->bulk_in_ep    = bulk_in_ep->desc.bEndpointAddress;
 673         data->bulk_out_ep   = bulk_out_ep->desc.bEndpointAddress;
 674         data->bulk_pkt_size = le16_to_cpu(bulk_out_ep->desc.wMaxPacketSize);
 675
 676         rwlock_init(&data->lock);
 677
 678         data->reassembly = NULL;
 679
 680         skb_queue_head_init(&data->transmit_q);
 681         skb_queue_head_init(&data->pending_q);
 682         skb_queue_head_init(&data->completed_q);
 683
 684         if (request_firmware(&firmware, "bfubase.frm", &udev->dev) < 0) {
 685                 BT_ERR("Firmware request failed");
 686                 goto error;
 687         }
 688
 689         BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);
 690
 691         if (bfusb_load_firmware(data, firmware->data, firmware->size) < 0) {
 692                 BT_ERR("Firmware loading failed");
 693                 goto release;
 694         }
 695
 696         release_firmware(firmware);
 697
 698         /* Initialize and register HCI device */
 699         hdev = hci_alloc_dev();
 700         if (!hdev) {
 701                 BT_ERR("Can't allocate HCI device");
 702                 goto error;
 703         }
 704
 705         data->hdev = hdev;
 706
 707         hdev->type = HCI_USB;
 708         hdev->driver_data = data;
 709         SET_HCIDEV_DEV(hdev, &intf->dev);
 710
 711         hdev->open     = bfusb_open;
 712         hdev->close    = bfusb_close;
 713         hdev->flush    = bfusb_flush;
 714         hdev->send     = bfusb_send_frame;
 715         hdev->destruct = bfusb_destruct;
 716         hdev->ioctl    = bfusb_ioctl;
 717
 718         hdev->owner = THIS_MODULE;
 719
 720         if (hci_register_dev(hdev) < 0) {
 721                 BT_ERR("Can't register HCI device");
 722                 hci_free_dev(hdev);
 723                 goto error;
 724         }
 725
 726         usb_set_intfdata(intf, data);
 727
 728         return 0;
 729
 730 release:
 731         release_firmware(firmware);
 732
 733 error:
 734         kfree(data);
 735
 736 done:
 737         return -EIO;
 738 }
 739
 740 static void bfusb_disconnect(struct usb_interface *intf)
 741 {
 742         struct bfusb_data *data = usb_get_intfdata(intf);
 743         struct hci_dev *hdev = data->hdev;
 744
 745         BT_DBG("intf %p", intf);
 746
 747         if (!hdev)
 748                 return;
 749
 750         usb_set_intfdata(intf, NULL);
 751
 752         bfusb_close(hdev);
 753
 754         if (hci_unregister_dev(hdev) < 0)
 755                 BT_ERR("Can't unregister HCI device %s", hdev->name);
 756
 757         hci_free_dev(hdev);
 758 }
 759
 760 static struct usb_driver bfusb_driver = {
 761         .name           = "bfusb",
 762         .probe          = bfusb_probe,
 763         .disconnect     = bfusb_disconnect,
 764         .id_table       = bfusb_table,
 765 };
 766
 767 static int __init bfusb_init(void)
 768 {
 769         int err;
 770
 771         BT_INFO("BlueFRITZ! USB driver ver %s", VERSION);
 772
 773         err = usb_register(&bfusb_driver);
 774         if (err < 0)
 775                 BT_ERR("Failed to register BlueFRITZ! USB driver");
 776
 777         return err;
 778 }
 779
 780 static void __exit bfusb_exit(void)
 781 {
 782         usb_deregister(&bfusb_driver);
 783 }
 784
 785 module_init(bfusb_init);
 786 module_exit(bfusb_exit);
 787
 788 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 789 MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION);
 790 MODULE_VERSION(VERSION);
 791 MODULE_LICENSE("GPL");
 792 MODULE_FIRMWARE("bfubase.frm");