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