drivers/bluetooth/bfusb.c

   1 /*
   2  *
   3  *  AVM BlueFRITZ! USB driver
   4  *
   5  *  Copyright (C) 2003  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/config.h>
  25 #include <linux/module.h>
  26
  27 #include <linux/kernel.h>
  28 #include <linux/init.h>
  29 #include <linux/slab.h>
  30 #include <linux/types.h>
  31 #include <linux/sched.h>
  32 #include <linux/errno.h>
  33 #include <linux/skbuff.h>
  34
  35 #include <linux/device.h>
  36 #include <linux/firmware.h>
  37
  38 #include <linux/usb.h>
  39
  40 #include <net/bluetooth/bluetooth.h>
  41 #include <net/bluetooth/hci_core.h>
  42
  43 #ifndef CONFIG_BT_HCIBFUSB_DEBUG
  44 #undef  BT_DBG
  45 #define BT_DBG(D...)
  46 #endif
  47
  48 #define VERSION "1.1"
  49
  50 static int ignore = 0;
  51
  52 static struct usb_driver bfusb_driver;
  53
  54 static struct usb_device_id bfusb_table[] = {
  55         /* AVM BlueFRITZ! USB */
  56         { USB_DEVICE(0x057c, 0x2200) },
  57
  58         { }     /* Terminating entry */
  59 };
  60
  61 MODULE_DEVICE_TABLE(usb, bfusb_table);
  62
  63
  64 #define BFUSB_MAX_BLOCK_SIZE    256
  65
  66 #define BFUSB_BLOCK_TIMEOUT     3000
  67
  68 #define BFUSB_TX_PROCESS        1
  69 #define BFUSB_TX_WAKEUP         2
  70
  71 #define BFUSB_MAX_BULK_TX       2
  72 #define BFUSB_MAX_BULK_RX       2
  73
  74 struct bfusb {
  75         struct hci_dev          *hdev;
  76
  77         unsigned long           state;
  78
  79         struct usb_device       *udev;
  80
  81         unsigned int            bulk_in_ep;
  82         unsigned int            bulk_out_ep;
  83         unsigned int            bulk_pkt_size;
  84
  85         rwlock_t                lock;
  86
  87         struct sk_buff_head     transmit_q;
  88
  89         struct sk_buff          *reassembly;
  90
  91         atomic_t                pending_tx;
  92         struct sk_buff_head     pending_q;
  93         struct sk_buff_head     completed_q;
  94 };
  95
  96 struct bfusb_scb {
  97         struct urb *urb;
  98 };
  99
 100 static void bfusb_tx_complete(struct urb *urb, struct pt_regs *regs);
 101 static void bfusb_rx_complete(struct urb *urb, struct pt_regs *regs);
 102
 103 static struct urb *bfusb_get_completed(struct bfusb *bfusb)
 104 {
 105         struct sk_buff *skb;
 106         struct urb *urb = NULL;
 107
 108         BT_DBG("bfusb %p", bfusb);
 109
 110         skb = skb_dequeue(&bfusb->completed_q);
 111         if (skb) {
 112                 urb = ((struct bfusb_scb *) skb->cb)->urb;
 113                 kfree_skb(skb);
 114         }
 115
 116         return urb;
 117 }
 118
 119 static void bfusb_unlink_urbs(struct bfusb *bfusb)
 120 {
 121         struct sk_buff *skb;
 122         struct urb *urb;
 123
 124         BT_DBG("bfusb %p", bfusb);
 125
 126         while ((skb = skb_dequeue(&bfusb->pending_q))) {
 127                 urb = ((struct bfusb_scb *) skb->cb)->urb;
 128                 usb_kill_urb(urb);
 129                 skb_queue_tail(&bfusb->completed_q, skb);
 130         }
 131
 132         while ((urb = bfusb_get_completed(bfusb)))
 133                 usb_free_urb(urb);
 134 }
 135
 136
 137 static int bfusb_send_bulk(struct bfusb *bfusb, struct sk_buff *skb)
 138 {
 139         struct bfusb_scb *scb = (void *) skb->cb;
 140         struct urb *urb = bfusb_get_completed(bfusb);
 141         int err, pipe;
 142
 143         BT_DBG("bfusb %p skb %p len %d", bfusb, skb, skb->len);
 144
 145         if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
 146                 return -ENOMEM;
 147
 148         pipe = usb_sndbulkpipe(bfusb->udev, bfusb->bulk_out_ep);
 149
 150         usb_fill_bulk_urb(urb, bfusb->udev, pipe, skb->data, skb->len,
 151                         bfusb_tx_complete, skb);
 152
 153         scb->urb = urb;
 154
 155         skb_queue_tail(&bfusb->pending_q, skb);
 156
 157         err = usb_submit_urb(urb, GFP_ATOMIC);
 158         if (err) {
 159                 BT_ERR("%s bulk tx submit failed urb %p err %d",
 160                                         bfusb->hdev->name, urb, err);
 161                 skb_unlink(skb);
 162                 usb_free_urb(urb);
 163         } else
 164                 atomic_inc(&bfusb->pending_tx);
 165
 166         return err;
 167 }
 168
 169 static void bfusb_tx_wakeup(struct bfusb *bfusb)
 170 {
 171         struct sk_buff *skb;
 172
 173         BT_DBG("bfusb %p", bfusb);
 174
 175         if (test_and_set_bit(BFUSB_TX_PROCESS, &bfusb->state)) {
 176                 set_bit(BFUSB_TX_WAKEUP, &bfusb->state);
 177                 return;
 178         }
 179
 180         do {
 181                 clear_bit(BFUSB_TX_WAKEUP, &bfusb->state);
 182
 183                 while ((atomic_read(&bfusb->pending_tx) < BFUSB_MAX_BULK_TX) &&
 184                                 (skb = skb_dequeue(&bfusb->transmit_q))) {
 185                         if (bfusb_send_bulk(bfusb, skb) < 0) {
 186                                 skb_queue_head(&bfusb->transmit_q, skb);
 187                                 break;
 188                         }
 189                 }
 190
 191         } while (test_bit(BFUSB_TX_WAKEUP, &bfusb->state));
 192
 193         clear_bit(BFUSB_TX_PROCESS, &bfusb->state);
 194 }
 195
 196 static void bfusb_tx_complete(struct urb *urb, struct pt_regs *regs)
 197 {
 198         struct sk_buff *skb = (struct sk_buff *) urb->context;
 199         struct bfusb *bfusb = (struct bfusb *) skb->dev;
 200
 201         BT_DBG("bfusb %p urb %p skb %p len %d", bfusb, urb, skb, skb->len);
 202
 203         atomic_dec(&bfusb->pending_tx);
 204
 205         if (!test_bit(HCI_RUNNING, &bfusb->hdev->flags))
 206                 return;
 207
 208         if (!urb->status)
 209                 bfusb->hdev->stat.byte_tx += skb->len;
 210         else
 211                 bfusb->hdev->stat.err_tx++;
 212
 213         read_lock(&bfusb->lock);
 214
 215         skb_unlink(skb);
 216         skb_queue_tail(&bfusb->completed_q, skb);
 217
 218         bfusb_tx_wakeup(bfusb);
 219
 220         read_unlock(&bfusb->lock);
 221 }
 222
 223
 224 static int bfusb_rx_submit(struct bfusb *bfusb, struct urb *urb)
 225 {
 226         struct bfusb_scb *scb;
 227         struct sk_buff *skb;
 228         int err, pipe, size = HCI_MAX_FRAME_SIZE + 32;
 229
 230         BT_DBG("bfusb %p urb %p", bfusb, urb);
 231
 232         if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
 233                 return -ENOMEM;
 234
 235         if (!(skb = bt_skb_alloc(size, GFP_ATOMIC))) {
 236                 usb_free_urb(urb);
 237                 return -ENOMEM;
 238         }
 239
 240         skb->dev = (void *) bfusb;
 241
 242         scb = (struct bfusb_scb *) skb->cb;
 243         scb->urb = urb;
 244
 245         pipe = usb_rcvbulkpipe(bfusb->udev, bfusb->bulk_in_ep);
 246
 247         usb_fill_bulk_urb(urb, bfusb->udev, pipe, skb->data, size,
 248                         bfusb_rx_complete, skb);
 249
 250         skb_queue_tail(&bfusb->pending_q, skb);
 251
 252         err = usb_submit_urb(urb, GFP_ATOMIC);
 253         if (err) {
 254                 BT_ERR("%s bulk rx submit failed urb %p err %d",
 255                                         bfusb->hdev->name, urb, err);
 256                 skb_unlink(skb);
 257                 kfree_skb(skb);
 258                 usb_free_urb(urb);
 259         }
 260
 261         return err;
 262 }
 263
 264 static inline int bfusb_recv_block(struct bfusb *bfusb, int hdr, unsigned char *data, int len)
 265 {
 266         BT_DBG("bfusb %p hdr 0x%02x data %p len %d", bfusb, hdr, data, len);
 267
 268         if (hdr & 0x10) {
 269                 BT_ERR("%s error in block", bfusb->hdev->name);
 270                 if (bfusb->reassembly)
 271                         kfree_skb(bfusb->reassembly);
 272                 bfusb->reassembly = NULL;
 273                 return -EIO;
 274         }
 275
 276         if (hdr & 0x04) {
 277                 struct sk_buff *skb;
 278                 unsigned char pkt_type;
 279                 int pkt_len = 0;
 280
 281                 if (bfusb->reassembly) {
 282                         BT_ERR("%s unexpected start block", bfusb->hdev->name);
 283                         kfree_skb(bfusb->reassembly);
 284                         bfusb->reassembly = NULL;
 285                 }
 286
 287                 if (len < 1) {
 288                         BT_ERR("%s no packet type found", bfusb->hdev->name);
 289                         return -EPROTO;
 290                 }
 291
 292                 pkt_type = *data++; len--;
 293
 294                 switch (pkt_type) {
 295                 case HCI_EVENT_PKT:
 296                         if (len >= HCI_EVENT_HDR_SIZE) {
 297                                 struct hci_event_hdr *hdr = (struct hci_event_hdr *) data;
 298                                 pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen;
 299                         } else {
 300                                 BT_ERR("%s event block is too short", bfusb->hdev->name);
 301                                 return -EILSEQ;
 302                         }
 303                         break;
 304
 305                 case HCI_ACLDATA_PKT:
 306                         if (len >= HCI_ACL_HDR_SIZE) {
 307                                 struct hci_acl_hdr *hdr = (struct hci_acl_hdr *) data;
 308                                 pkt_len = HCI_ACL_HDR_SIZE + __le16_to_cpu(hdr->dlen);
 309                         } else {
 310                                 BT_ERR("%s data block is too short", bfusb->hdev->name);
 311                                 return -EILSEQ;
 312                         }
 313                         break;
 314
 315                 case HCI_SCODATA_PKT:
 316                         if (len >= HCI_SCO_HDR_SIZE) {
 317                                 struct hci_sco_hdr *hdr = (struct hci_sco_hdr *) data;
 318                                 pkt_len = HCI_SCO_HDR_SIZE + hdr->dlen;
 319                         } else {
 320                                 BT_ERR("%s audio block is too short", bfusb->hdev->name);
 321                                 return -EILSEQ;
 322                         }
 323                         break;
 324                 }
 325
 326                 skb = bt_skb_alloc(pkt_len, GFP_ATOMIC);
 327                 if (!skb) {
 328                         BT_ERR("%s no memory for the packet", bfusb->hdev->name);
 329                         return -ENOMEM;
 330                 }
 331
 332                 skb->dev = (void *) bfusb->hdev;
 333                 skb->pkt_type = pkt_type;
 334
 335                 bfusb->reassembly = skb;
 336         } else {
 337                 if (!bfusb->reassembly) {
 338                         BT_ERR("%s unexpected continuation block", bfusb->hdev->name);
 339                         return -EIO;
 340                 }
 341         }
 342
 343         if (len > 0)
 344                 memcpy(skb_put(bfusb->reassembly, len), data, len);
 345
 346         if (hdr & 0x08) {
 347                 hci_recv_frame(bfusb->reassembly);
 348                 bfusb->reassembly = NULL;
 349         }
 350
 351         return 0;
 352 }
 353
 354 static void bfusb_rx_complete(struct urb *urb, struct pt_regs *regs)
 355 {
 356         struct sk_buff *skb = (struct sk_buff *) urb->context;
 357         struct bfusb *bfusb = (struct bfusb *) skb->dev;
 358         unsigned char *buf = urb->transfer_buffer;
 359         int count = urb->actual_length;
 360         int err, hdr, len;
 361
 362         BT_DBG("bfusb %p urb %p skb %p len %d", bfusb, urb, skb, skb->len);
 363
 364         read_lock(&bfusb->lock);
 365
 366         if (!test_bit(HCI_RUNNING, &bfusb->hdev->flags))
 367                 goto unlock;
 368
 369         if (urb->status || !count)
 370                 goto resubmit;
 371
 372         bfusb->hdev->stat.byte_rx += count;
 373
 374         skb_put(skb, count);
 375
 376         while (count) {
 377                 hdr = buf[0] | (buf[1] << 8);
 378
 379                 if (hdr & 0x4000) {
 380                         len = 0;
 381                         count -= 2;
 382                         buf   += 2;
 383                 } else {
 384                         len = (buf[2] == 0) ? 256 : buf[2];
 385                         count -= 3;
 386                         buf   += 3;
 387                 }
 388
 389                 if (count < len) {
 390                         BT_ERR("%s block extends over URB buffer ranges",
 391                                         bfusb->hdev->name);
 392                 }
 393
 394                 if ((hdr & 0xe1) == 0xc1)
 395                         bfusb_recv_block(bfusb, hdr, buf, len);
 396
 397                 count -= len;
 398                 buf   += len;
 399         }
 400
 401         skb_unlink(skb);
 402         kfree_skb(skb);
 403
 404         bfusb_rx_submit(bfusb, urb);
 405
 406         read_unlock(&bfusb->lock);
 407
 408         return;
 409
 410 resubmit:
 411         urb->dev = bfusb->udev;
 412
 413         err = usb_submit_urb(urb, GFP_ATOMIC);
 414         if (err) {
 415                 BT_ERR("%s bulk resubmit failed urb %p err %d",
 416                                         bfusb->hdev->name, urb, err);
 417         }
 418
 419 unlock:
 420         read_unlock(&bfusb->lock);
 421 }
 422
 423
 424 static int bfusb_open(struct hci_dev *hdev)
 425 {
 426         struct bfusb *bfusb = (struct bfusb *) hdev->driver_data;
 427         unsigned long flags;
 428         int i, err;
 429
 430         BT_DBG("hdev %p bfusb %p", hdev, bfusb);
 431
 432         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
 433                 return 0;
 434
 435         write_lock_irqsave(&bfusb->lock, flags);
 436
 437         err = bfusb_rx_submit(bfusb, NULL);
 438         if (!err) {
 439                 for (i = 1; i < BFUSB_MAX_BULK_RX; i++)
 440                         bfusb_rx_submit(bfusb, NULL);
 441         } else {
 442                 clear_bit(HCI_RUNNING, &hdev->flags);
 443         }
 444
 445         write_unlock_irqrestore(&bfusb->lock, flags);
 446
 447         return err;
 448 }
 449
 450 static int bfusb_flush(struct hci_dev *hdev)
 451 {
 452         struct bfusb *bfusb = (struct bfusb *) hdev->driver_data;
 453
 454         BT_DBG("hdev %p bfusb %p", hdev, bfusb);
 455
 456         skb_queue_purge(&bfusb->transmit_q);
 457
 458         return 0;
 459 }
 460
 461 static int bfusb_close(struct hci_dev *hdev)
 462 {
 463         struct bfusb *bfusb = (struct bfusb *) hdev->driver_data;
 464         unsigned long flags;
 465
 466         BT_DBG("hdev %p bfusb %p", hdev, bfusb);
 467
 468         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 469                 return 0;
 470
 471         write_lock_irqsave(&bfusb->lock, flags);
 472         write_unlock_irqrestore(&bfusb->lock, flags);
 473
 474         bfusb_unlink_urbs(bfusb);
 475         bfusb_flush(hdev);
 476
 477         return 0;
 478 }
 479
 480 static int bfusb_send_frame(struct sk_buff *skb)
 481 {
 482         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 483         struct bfusb *bfusb;
 484         struct sk_buff *nskb;
 485         unsigned char buf[3];
 486         int sent = 0, size, count;
 487
 488         BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, skb->pkt_type, skb->len);
 489
 490         if (!hdev) {
 491                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
 492                 return -ENODEV;
 493         }
 494
 495         if (!test_bit(HCI_RUNNING, &hdev->flags))
 496                 return -EBUSY;
 497
 498         bfusb = (struct bfusb *) hdev->driver_data;
 499
 500         switch (skb->pkt_type) {
 501         case HCI_COMMAND_PKT:
 502                 hdev->stat.cmd_tx++;
 503                 break;
 504         case HCI_ACLDATA_PKT:
 505                 hdev->stat.acl_tx++;
 506                 break;
 507         case HCI_SCODATA_PKT:
 508                 hdev->stat.sco_tx++;
 509                 break;
 510         };
 511
 512         /* Prepend skb with frame type */
 513         memcpy(skb_push(skb, 1), &(skb->pkt_type), 1);
 514
 515         count = skb->len;
 516
 517         /* Max HCI frame size seems to be 1511 + 1 */
 518         if (!(nskb = bt_skb_alloc(count + 32, GFP_ATOMIC))) {
 519                 BT_ERR("Can't allocate memory for new packet");
 520                 return -ENOMEM;
 521         }
 522
 523         nskb->dev = (void *) bfusb;
 524
 525         while (count) {
 526                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE);
 527
 528                 buf[0] = 0xc1 | ((sent == 0) ? 0x04 : 0) | ((count == size) ? 0x08 : 0);
 529                 buf[1] = 0x00;
 530                 buf[2] = (size == BFUSB_MAX_BLOCK_SIZE) ? 0 : size;
 531
 532                 memcpy(skb_put(nskb, 3), buf, 3);
 533                 memcpy(skb_put(nskb, size), skb->data + sent, size);
 534
 535                 sent  += size;
 536                 count -= size;
 537         }
 538
 539         /* Don't send frame with multiple size of bulk max packet */
 540         if ((nskb->len % bfusb->bulk_pkt_size) == 0) {
 541                 buf[0] = 0xdd;
 542                 buf[1] = 0x00;
 543                 memcpy(skb_put(nskb, 2), buf, 2);
 544         }
 545
 546         read_lock(&bfusb->lock);
 547
 548         skb_queue_tail(&bfusb->transmit_q, nskb);
 549         bfusb_tx_wakeup(bfusb);
 550
 551         read_unlock(&bfusb->lock);
 552
 553         kfree_skb(skb);
 554
 555         return 0;
 556 }
 557
 558 static void bfusb_destruct(struct hci_dev *hdev)
 559 {
 560         struct bfusb *bfusb = (struct bfusb *) hdev->driver_data;
 561
 562         BT_DBG("hdev %p bfusb %p", hdev, bfusb);
 563
 564         kfree(bfusb);
 565 }
 566
 567 static int bfusb_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
 568 {
 569         return -ENOIOCTLCMD;
 570 }
 571
 572
 573 static int bfusb_load_firmware(struct bfusb *bfusb, unsigned char *firmware, int count)
 574 {
 575         unsigned char *buf;
 576         int err, pipe, len, size, sent = 0;
 577
 578         BT_DBG("bfusb %p udev %p", bfusb, bfusb->udev);
 579
 580         BT_INFO("BlueFRITZ! USB loading firmware");
 581
 582         pipe = usb_sndctrlpipe(bfusb->udev, 0);
 583
 584         if (usb_control_msg(bfusb->udev, pipe, USB_REQ_SET_CONFIGURATION,
 585                                 0, 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT) < 0) {
 586                 BT_ERR("Can't change to loading configuration");
 587                 return -EBUSY;
 588         }
 589
 590         bfusb->udev->toggle[0] = bfusb->udev->toggle[1] = 0;
 591
 592         buf = kmalloc(BFUSB_MAX_BLOCK_SIZE + 3, GFP_ATOMIC);
 593         if (!buf) {
 594                 BT_ERR("Can't allocate memory chunk for firmware");
 595                 return -ENOMEM;
 596         }
 597
 598         pipe = usb_sndbulkpipe(bfusb->udev, bfusb->bulk_out_ep);
 599
 600         while (count) {
 601                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE + 3);
 602
 603                 memcpy(buf, firmware + sent, size);
 604
 605                 err = usb_bulk_msg(bfusb->udev, pipe, buf, size,
 606                                         &len, BFUSB_BLOCK_TIMEOUT);
 607
 608                 if (err || (len != size)) {
 609                         BT_ERR("Error in firmware loading");
 610                         goto error;
 611                 }
 612
 613                 sent  += size;
 614                 count -= size;
 615         }
 616
 617         if ((err = usb_bulk_msg(bfusb->udev, pipe, NULL, 0,
 618                                 &len, BFUSB_BLOCK_TIMEOUT)) < 0) {
 619                 BT_ERR("Error in null packet request");
 620                 goto error;
 621         }
 622
 623         pipe = usb_sndctrlpipe(bfusb->udev, 0);
 624
 625         if ((err = usb_control_msg(bfusb->udev, pipe, USB_REQ_SET_CONFIGURATION,
 626                                 0, 2, 0, NULL, 0, USB_CTRL_SET_TIMEOUT)) < 0) {
 627                 BT_ERR("Can't change to running configuration");
 628                 goto error;
 629         }
 630
 631         bfusb->udev->toggle[0] = bfusb->udev->toggle[1] = 0;
 632
 633         BT_INFO("BlueFRITZ! USB device ready");
 634
 635         kfree(buf);
 636         return 0;
 637
 638 error:
 639         kfree(buf);
 640
 641         pipe = usb_sndctrlpipe(bfusb->udev, 0);
 642
 643         usb_control_msg(bfusb->udev, pipe, USB_REQ_SET_CONFIGURATION,
 644                                 0, 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 645
 646         return err;
 647 }
 648
 649 static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 650 {
 651         const struct firmware *firmware;
 652         struct usb_device *udev = interface_to_usbdev(intf);
 653         struct usb_host_endpoint *bulk_out_ep;
 654         struct usb_host_endpoint *bulk_in_ep;
 655         struct hci_dev *hdev;
 656         struct bfusb *bfusb;
 657
 658         BT_DBG("intf %p id %p", intf, id);
 659
 660         if (ignore)
 661                 return -ENODEV;
 662
 663         /* Check number of endpoints */
 664         if (intf->cur_altsetting->desc.bNumEndpoints < 2)
 665                 return -EIO;
 666
 667         bulk_out_ep = &intf->cur_altsetting->endpoint[0];
 668         bulk_in_ep  = &intf->cur_altsetting->endpoint[1];
 669
 670         if (!bulk_out_ep || !bulk_in_ep) {
 671                 BT_ERR("Bulk endpoints not found");
 672                 goto done;
 673         }
 674
 675         /* Initialize control structure and load firmware */
 676         if (!(bfusb = kmalloc(sizeof(struct bfusb), GFP_KERNEL))) {
 677                 BT_ERR("Can't allocate memory for control structure");
 678                 goto done;
 679         }
 680
 681         memset(bfusb, 0, sizeof(struct bfusb));
 682
 683         bfusb->udev = udev;
 684         bfusb->bulk_in_ep    = bulk_in_ep->desc.bEndpointAddress;
 685         bfusb->bulk_out_ep   = bulk_out_ep->desc.bEndpointAddress;
 686         bfusb->bulk_pkt_size = le16_to_cpu(bulk_out_ep->desc.wMaxPacketSize);
 687
 688         rwlock_init(&bfusb->lock);
 689
 690         bfusb->reassembly = NULL;
 691
 692         skb_queue_head_init(&bfusb->transmit_q);
 693         skb_queue_head_init(&bfusb->pending_q);
 694         skb_queue_head_init(&bfusb->completed_q);
 695
 696         if (request_firmware(&firmware, "bfubase.frm", &udev->dev) < 0) {
 697                 BT_ERR("Firmware request failed");
 698                 goto error;
 699         }
 700
 701         BT_DBG("firmware data %p size %d", firmware->data, firmware->size);
 702
 703         if (bfusb_load_firmware(bfusb, firmware->data, firmware->size) < 0) {
 704                 BT_ERR("Firmware loading failed");
 705                 goto release;
 706         }
 707
 708         release_firmware(firmware);
 709
 710         /* Initialize and register HCI device */
 711         hdev = hci_alloc_dev();
 712         if (!hdev) {
 713                 BT_ERR("Can't allocate HCI device");
 714                 goto error;
 715         }
 716
 717         bfusb->hdev = hdev;
 718
 719         hdev->type = HCI_USB;
 720         hdev->driver_data = bfusb;
 721         SET_HCIDEV_DEV(hdev, &intf->dev);
 722
 723         hdev->open     = bfusb_open;
 724         hdev->close    = bfusb_close;
 725         hdev->flush    = bfusb_flush;
 726         hdev->send     = bfusb_send_frame;
 727         hdev->destruct = bfusb_destruct;
 728         hdev->ioctl    = bfusb_ioctl;
 729
 730         hdev->owner = THIS_MODULE;
 731
 732         if (hci_register_dev(hdev) < 0) {
 733                 BT_ERR("Can't register HCI device");
 734                 hci_free_dev(hdev);
 735                 goto error;
 736         }
 737
 738         usb_set_intfdata(intf, bfusb);
 739
 740         return 0;
 741
 742 release:
 743         release_firmware(firmware);
 744
 745 error:
 746         kfree(bfusb);
 747
 748 done:
 749         return -EIO;
 750 }
 751
 752 static void bfusb_disconnect(struct usb_interface *intf)
 753 {
 754         struct bfusb *bfusb = usb_get_intfdata(intf);
 755         struct hci_dev *hdev = bfusb->hdev;
 756
 757         BT_DBG("intf %p", intf);
 758
 759         if (!hdev)
 760                 return;
 761
 762         usb_set_intfdata(intf, NULL);
 763
 764         bfusb_close(hdev);
 765
 766         if (hci_unregister_dev(hdev) < 0)
 767                 BT_ERR("Can't unregister HCI device %s", hdev->name);
 768
 769         hci_free_dev(hdev);
 770 }
 771
 772 static struct usb_driver bfusb_driver = {
 773         .owner          = THIS_MODULE,
 774         .name           = "bfusb",
 775         .probe          = bfusb_probe,
 776         .disconnect     = bfusb_disconnect,
 777         .id_table       = bfusb_table,
 778 };
 779
 780 static int __init bfusb_init(void)
 781 {
 782         int err;
 783
 784         BT_INFO("BlueFRITZ! USB driver ver %s", VERSION);
 785
 786         if ((err = usb_register(&bfusb_driver)) < 0)
 787                 BT_ERR("Failed to register BlueFRITZ! USB driver");
 788
 789         return err;
 790 }
 791
 792 static void __exit bfusb_exit(void)
 793 {
 794         usb_deregister(&bfusb_driver);
 795 }
 796
 797 module_init(bfusb_init);
 798 module_exit(bfusb_exit);
 799
 800 module_param(ignore, bool, 0644);
 801 MODULE_PARM_DESC(ignore, "Ignore devices from the matching table");
 802
 803 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 804 MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION);
 805 MODULE_VERSION(VERSION);
 806 MODULE_LICENSE("GPL");