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 #ifndef CONFIG_BT_HCIBFUSB_DEBUG
  42 #undef  BT_DBG
  43 #define BT_DBG(D...)
  44 #endif
  45
  46 #define VERSION "1.1"
  47
  48 static int ignore = 0;
  49
  50 static struct usb_driver bfusb_driver;
  51
  52 static struct usb_device_id bfusb_table[] = {
  53         /* AVM BlueFRITZ! USB */
  54         { USB_DEVICE(0x057c, 0x2200) },
  55
  56         { }     /* Terminating entry */
  57 };
  58
  59 MODULE_DEVICE_TABLE(usb, bfusb_table);
  60
  61 #define BFUSB_MAX_BLOCK_SIZE    256
  62
  63 #define BFUSB_BLOCK_TIMEOUT     3000
  64
  65 #define BFUSB_TX_PROCESS        1
  66 #define BFUSB_TX_WAKEUP         2
  67
  68 #define BFUSB_MAX_BULK_TX       2
  69 #define BFUSB_MAX_BULK_RX       2
  70
  71 struct bfusb_data {
  72         struct hci_dev          *hdev;
  73
  74         unsigned long           state;
  75
  76         struct usb_device       *udev;
  77
  78         unsigned int            bulk_in_ep;
  79         unsigned int            bulk_out_ep;
  80         unsigned int            bulk_pkt_size;
  81
  82         rwlock_t                lock;
  83
  84         struct sk_buff_head     transmit_q;
  85
  86         struct sk_buff          *reassembly;
  87
  88         atomic_t                pending_tx;
  89         struct sk_buff_head     pending_q;
  90         struct sk_buff_head     completed_q;
  91 };
  92
  93 struct bfusb_data_scb {
  94         struct urb *urb;
  95 };
  96
  97 static void bfusb_tx_complete(struct urb *urb);
  98 static void bfusb_rx_complete(struct urb *urb);
  99
 100 static struct urb *bfusb_get_completed(struct bfusb_data *data)
 101 {
 102         struct sk_buff *skb;
 103         struct urb *urb = NULL;
 104
 105         BT_DBG("bfusb %p", data);
 106
 107         skb = skb_dequeue(&data->completed_q);
 108         if (skb) {
 109                 urb = ((struct bfusb_data_scb *) skb->cb)->urb;
 110                 kfree_skb(skb);
 111         }
 112
 113         return urb;
 114 }
 115
 116 static void bfusb_unlink_urbs(struct bfusb_data *data)
 117 {
 118         struct sk_buff *skb;
 119         struct urb *urb;
 120
 121         BT_DBG("bfusb %p", data);
 122
 123         while ((skb = skb_dequeue(&data->pending_q))) {
 124                 urb = ((struct bfusb_data_scb *) skb->cb)->urb;
 125                 usb_kill_urb(urb);
 126                 skb_queue_tail(&data->completed_q, skb);
 127         }
 128
 129         while ((urb = bfusb_get_completed(data)))
 130                 usb_free_urb(urb);
 131 }
 132
 133 static int bfusb_send_bulk(struct bfusb_data *data, struct sk_buff *skb)
 134 {
 135         struct bfusb_data_scb *scb = (void *) skb->cb;
 136         struct urb *urb = bfusb_get_completed(data);
 137         int err, pipe;
 138
 139         BT_DBG("bfusb %p skb %p len %d", data, skb, skb->len);
 140
 141         if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
 142                 return -ENOMEM;
 143
 144         pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
 145
 146         usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, skb->len,
 147                         bfusb_tx_complete, skb);
 148
 149         scb->urb = urb;
 150
 151         skb_queue_tail(&data->pending_q, skb);
 152
 153         err = usb_submit_urb(urb, GFP_ATOMIC);
 154         if (err) {
 155                 BT_ERR("%s bulk tx submit failed urb %p err %d",
 156                                         data->hdev->name, urb, err);
 157                 skb_unlink(skb, &data->pending_q);
 158                 usb_free_urb(urb);
 159         } else
 160                 atomic_inc(&data->pending_tx);
 161
 162         return err;
 163 }
 164
 165 static void bfusb_tx_wakeup(struct bfusb_data *data)
 166 {
 167         struct sk_buff *skb;
 168
 169         BT_DBG("bfusb %p", data);
 170
 171         if (test_and_set_bit(BFUSB_TX_PROCESS, &data->state)) {
 172                 set_bit(BFUSB_TX_WAKEUP, &data->state);
 173                 return;
 174         }
 175
 176         do {
 177                 clear_bit(BFUSB_TX_WAKEUP, &data->state);
 178
 179                 while ((atomic_read(&data->pending_tx) < BFUSB_MAX_BULK_TX) &&
 180                                 (skb = skb_dequeue(&data->transmit_q))) {
 181                         if (bfusb_send_bulk(data, skb) < 0) {
 182                                 skb_queue_head(&data->transmit_q, skb);
 183                                 break;
 184                         }
 185                 }
 186
 187         } while (test_bit(BFUSB_TX_WAKEUP, &data->state));
 188
 189         clear_bit(BFUSB_TX_PROCESS, &data->state);
 190 }
 191
 192 static void bfusb_tx_complete(struct urb *urb)
 193 {
 194         struct sk_buff *skb = (struct sk_buff *) urb->context;
 195         struct bfusb_data *data = (struct bfusb_data *) skb->dev;
 196
 197         BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
 198
 199         atomic_dec(&data->pending_tx);
 200
 201         if (!test_bit(HCI_RUNNING, &data->hdev->flags))
 202                 return;
 203
 204         if (!urb->status)
 205                 data->hdev->stat.byte_tx += skb->len;
 206         else
 207                 data->hdev->stat.err_tx++;
 208
 209         read_lock(&data->lock);
 210
 211         skb_unlink(skb, &data->pending_q);
 212         skb_queue_tail(&data->completed_q, skb);
 213
 214         bfusb_tx_wakeup(data);
 215
 216         read_unlock(&data->lock);
 217 }
 218
 219
 220 static int bfusb_rx_submit(struct bfusb_data *data, struct urb *urb)
 221 {
 222         struct bfusb_data_scb *scb;
 223         struct sk_buff *skb;
 224         int err, pipe, size = HCI_MAX_FRAME_SIZE + 32;
 225
 226         BT_DBG("bfusb %p urb %p", bfusb, urb);
 227
 228         if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
 229                 return -ENOMEM;
 230
 231         skb = bt_skb_alloc(size, GFP_ATOMIC);
 232         if (!skb) {
 233                 usb_free_urb(urb);
 234                 return -ENOMEM;
 235         }
 236
 237         skb->dev = (void *) data;
 238
 239         scb = (struct bfusb_data_scb *) skb->cb;
 240         scb->urb = urb;
 241
 242         pipe = usb_rcvbulkpipe(data->udev, data->bulk_in_ep);
 243
 244         usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, size,
 245                         bfusb_rx_complete, skb);
 246
 247         skb_queue_tail(&data->pending_q, skb);
 248
 249         err = usb_submit_urb(urb, GFP_ATOMIC);
 250         if (err) {
 251                 BT_ERR("%s bulk rx submit failed urb %p err %d",
 252                                         data->hdev->name, urb, err);
 253                 skb_unlink(skb, &data->pending_q);
 254                 kfree_skb(skb);
 255                 usb_free_urb(urb);
 256         }
 257
 258         return err;
 259 }
 260
 261 static inline int bfusb_recv_block(struct bfusb_data *data, int hdr, unsigned char *buf, int len)
 262 {
 263         BT_DBG("bfusb %p hdr 0x%02x data %p len %d", data, hdr, buf, len);
 264
 265         if (hdr & 0x10) {
 266                 BT_ERR("%s error in block", data->hdev->name);
 267                 if (data->reassembly)
 268                         kfree_skb(data->reassembly);
 269                 data->reassembly = NULL;
 270                 return -EIO;
 271         }
 272
 273         if (hdr & 0x04) {
 274                 struct sk_buff *skb;
 275                 unsigned char pkt_type;
 276                 int pkt_len = 0;
 277
 278                 if (data->reassembly) {
 279                         BT_ERR("%s unexpected start block", data->hdev->name);
 280                         kfree_skb(data->reassembly);
 281                         data->reassembly = NULL;
 282                 }
 283
 284                 if (len < 1) {
 285                         BT_ERR("%s no packet type found", data->hdev->name);
 286                         return -EPROTO;
 287                 }
 288
 289                 pkt_type = *buf++; len--;
 290
 291                 switch (pkt_type) {
 292                 case HCI_EVENT_PKT:
 293                         if (len >= HCI_EVENT_HDR_SIZE) {
 294                                 struct hci_event_hdr *hdr = (struct hci_event_hdr *) buf;
 295                                 pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen;
 296                         } else {
 297                                 BT_ERR("%s event block is too short", data->hdev->name);
 298                                 return -EILSEQ;
 299                         }
 300                         break;
 301
 302                 case HCI_ACLDATA_PKT:
 303                         if (len >= HCI_ACL_HDR_SIZE) {
 304                                 struct hci_acl_hdr *hdr = (struct hci_acl_hdr *) buf;
 305                                 pkt_len = HCI_ACL_HDR_SIZE + __le16_to_cpu(hdr->dlen);
 306                         } else {
 307                                 BT_ERR("%s data block is too short", data->hdev->name);
 308                                 return -EILSEQ;
 309                         }
 310                         break;
 311
 312                 case HCI_SCODATA_PKT:
 313                         if (len >= HCI_SCO_HDR_SIZE) {
 314                                 struct hci_sco_hdr *hdr = (struct hci_sco_hdr *) buf;
 315                                 pkt_len = HCI_SCO_HDR_SIZE + hdr->dlen;
 316                         } else {
 317                                 BT_ERR("%s audio block is too short", data->hdev->name);
 318                                 return -EILSEQ;
 319                         }
 320                         break;
 321                 }
 322
 323                 skb = bt_skb_alloc(pkt_len, GFP_ATOMIC);
 324                 if (!skb) {
 325                         BT_ERR("%s no memory for the packet", data->hdev->name);
 326                         return -ENOMEM;
 327                 }
 328
 329                 skb->dev = (void *) data->hdev;
 330                 bt_cb(skb)->pkt_type = pkt_type;
 331
 332                 data->reassembly = skb;
 333         } else {
 334                 if (!data->reassembly) {
 335                         BT_ERR("%s unexpected continuation block", data->hdev->name);
 336                         return -EIO;
 337                 }
 338         }
 339
 340         if (len > 0)
 341                 memcpy(skb_put(data->reassembly, len), buf, len);
 342
 343         if (hdr & 0x08) {
 344                 hci_recv_frame(data->reassembly);
 345                 data->reassembly = NULL;
 346         }
 347
 348         return 0;
 349 }
 350
 351 static void bfusb_rx_complete(struct urb *urb)
 352 {
 353         struct sk_buff *skb = (struct sk_buff *) urb->context;
 354         struct bfusb_data *data = (struct bfusb_data *) skb->dev;
 355         unsigned char *buf = urb->transfer_buffer;
 356         int count = urb->actual_length;
 357         int err, hdr, len;
 358
 359         BT_DBG("bfusb %p urb %p skb %p len %d", bfusb, urb, skb, skb->len);
 360
 361         read_lock(&data->lock);
 362
 363         if (!test_bit(HCI_RUNNING, &data->hdev->flags))
 364                 goto unlock;
 365
 366         if (urb->status || !count)
 367                 goto resubmit;
 368
 369         data->hdev->stat.byte_rx += count;
 370
 371         skb_put(skb, count);
 372
 373         while (count) {
 374                 hdr = buf[0] | (buf[1] << 8);
 375
 376                 if (hdr & 0x4000) {
 377                         len = 0;
 378                         count -= 2;
 379                         buf   += 2;
 380                 } else {
 381                         len = (buf[2] == 0) ? 256 : buf[2];
 382                         count -= 3;
 383                         buf   += 3;
 384                 }
 385
 386                 if (count < len) {
 387                         BT_ERR("%s block extends over URB buffer ranges",
 388                                         data->hdev->name);
 389                 }
 390
 391                 if ((hdr & 0xe1) == 0xc1)
 392                         bfusb_recv_block(data, hdr, buf, len);
 393
 394                 count -= len;
 395                 buf   += len;
 396         }
 397
 398         skb_unlink(skb, &data->pending_q);
 399         kfree_skb(skb);
 400
 401         bfusb_rx_submit(data, urb);
 402
 403         read_unlock(&data->lock);
 404
 405         return;
 406
 407 resubmit:
 408         urb->dev = data->udev;
 409
 410         err = usb_submit_urb(urb, GFP_ATOMIC);
 411         if (err) {
 412                 BT_ERR("%s bulk resubmit failed urb %p err %d",
 413                                         data->hdev->name, urb, err);
 414         }
 415
 416 unlock:
 417         read_unlock(&data->lock);
 418 }
 419
 420 static int bfusb_open(struct hci_dev *hdev)
 421 {
 422         struct bfusb_data *data = hdev->driver_data;
 423         unsigned long flags;
 424         int i, err;
 425
 426         BT_DBG("hdev %p bfusb %p", hdev, data);
 427
 428         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
 429                 return 0;
 430
 431         write_lock_irqsave(&data->lock, flags);
 432
 433         err = bfusb_rx_submit(data, NULL);
 434         if (!err) {
 435                 for (i = 1; i < BFUSB_MAX_BULK_RX; i++)
 436                         bfusb_rx_submit(data, NULL);
 437         } else {
 438                 clear_bit(HCI_RUNNING, &hdev->flags);
 439         }
 440
 441         write_unlock_irqrestore(&data->lock, flags);
 442
 443         return err;
 444 }
 445
 446 static int bfusb_flush(struct hci_dev *hdev)
 447 {
 448         struct bfusb_data *data = hdev->driver_data;
 449
 450         BT_DBG("hdev %p bfusb %p", hdev, data);
 451
 452         skb_queue_purge(&data->transmit_q);
 453
 454         return 0;
 455 }
 456
 457 static int bfusb_close(struct hci_dev *hdev)
 458 {
 459         struct bfusb_data *data = hdev->driver_data;
 460         unsigned long flags;
 461
 462         BT_DBG("hdev %p bfusb %p", hdev, data);
 463
 464         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 465                 return 0;
 466
 467         write_lock_irqsave(&data->lock, flags);
 468         write_unlock_irqrestore(&data->lock, flags);
 469
 470         bfusb_unlink_urbs(data);
 471         bfusb_flush(hdev);
 472
 473         return 0;
 474 }
 475
 476 static int bfusb_send_frame(struct sk_buff *skb)
 477 {
 478         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 479         struct bfusb_data *data;
 480         struct sk_buff *nskb;
 481         unsigned char buf[3];
 482         int sent = 0, size, count;
 483
 484         BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, bt_cb(skb)->pkt_type, skb->len);
 485
 486         if (!hdev) {
 487                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
 488                 return -ENODEV;
 489         }
 490
 491         if (!test_bit(HCI_RUNNING, &hdev->flags))
 492                 return -EBUSY;
 493
 494         data = hdev->driver_data;
 495
 496         switch (bt_cb(skb)->pkt_type) {
 497         case HCI_COMMAND_PKT:
 498                 hdev->stat.cmd_tx++;
 499                 break;
 500         case HCI_ACLDATA_PKT:
 501                 hdev->stat.acl_tx++;
 502                 break;
 503         case HCI_SCODATA_PKT:
 504                 hdev->stat.sco_tx++;
 505                 break;
 506         };
 507
 508         /* Prepend skb with frame type */
 509         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
 510
 511         count = skb->len;
 512
 513         /* Max HCI frame size seems to be 1511 + 1 */
 514         nskb = bt_skb_alloc(count + 32, GFP_ATOMIC);
 515         if (!nskb) {
 516                 BT_ERR("Can't allocate memory for new packet");
 517                 return -ENOMEM;
 518         }
 519
 520         nskb->dev = (void *) data;
 521
 522         while (count) {
 523                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE);
 524
 525                 buf[0] = 0xc1 | ((sent == 0) ? 0x04 : 0) | ((count == size) ? 0x08 : 0);
 526                 buf[1] = 0x00;
 527                 buf[2] = (size == BFUSB_MAX_BLOCK_SIZE) ? 0 : size;
 528
 529                 memcpy(skb_put(nskb, 3), buf, 3);
 530                 skb_copy_from_linear_data_offset(skb, sent, skb_put(nskb, size), size);
 531
 532                 sent  += size;
 533                 count -= size;
 534         }
 535
 536         /* Don't send frame with multiple size of bulk max packet */
 537         if ((nskb->len % data->bulk_pkt_size) == 0) {
 538                 buf[0] = 0xdd;
 539                 buf[1] = 0x00;
 540                 memcpy(skb_put(nskb, 2), buf, 2);
 541         }
 542
 543         read_lock(&data->lock);
 544
 545         skb_queue_tail(&data->transmit_q, nskb);
 546         bfusb_tx_wakeup(data);
 547
 548         read_unlock(&data->lock);
 549
 550         kfree_skb(skb);
 551
 552         return 0;
 553 }
 554
 555 static void bfusb_destruct(struct hci_dev *hdev)
 556 {
 557         struct bfusb_data *data = hdev->driver_data;
 558
 559         BT_DBG("hdev %p bfusb %p", hdev, data);
 560
 561         kfree(data);
 562 }
 563
 564 static int bfusb_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
 565 {
 566         return -ENOIOCTLCMD;
 567 }
 568
 569 static int bfusb_load_firmware(struct bfusb_data *data,
 570                                const 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");
 805 MODULE_FIRMWARE("bfubase.frm");