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 "1.2"
  47
  48 static struct usb_driver bfusb_driver;
  49
  50 static struct usb_device_id bfusb_table[] = {
  51         /* AVM BlueFRITZ! USB */
  52         { USB_DEVICE(0x057c, 0x2200) },
  53
  54         { }     /* Terminating entry */
  55 };
  56
  57 MODULE_DEVICE_TABLE(usb, bfusb_table);
  58
  59 #define BFUSB_MAX_BLOCK_SIZE    256
  60
  61 #define BFUSB_BLOCK_TIMEOUT     3000
  62
  63 #define BFUSB_TX_PROCESS        1
  64 #define BFUSB_TX_WAKEUP         2
  65
  66 #define BFUSB_MAX_BULK_TX       2
  67 #define BFUSB_MAX_BULK_RX       2
  68
  69 struct bfusb_data {
  70         struct hci_dev          *hdev;
  71
  72         unsigned long           state;
  73
  74         struct usb_device       *udev;
  75
  76         unsigned int            bulk_in_ep;
  77         unsigned int            bulk_out_ep;
  78         unsigned int            bulk_pkt_size;
  79
  80         rwlock_t                lock;
  81
  82         struct sk_buff_head     transmit_q;
  83
  84         struct sk_buff          *reassembly;
  85
  86         atomic_t                pending_tx;
  87         struct sk_buff_head     pending_q;
  88         struct sk_buff_head     completed_q;
  89 };
  90
  91 struct bfusb_data_scb {
  92         struct urb *urb;
  93 };
  94
  95 static void bfusb_tx_complete(struct urb *urb);
  96 static void bfusb_rx_complete(struct urb *urb);
  97
  98 static struct urb *bfusb_get_completed(struct bfusb_data *data)
  99 {
 100         struct sk_buff *skb;
 101         struct urb *urb = NULL;
 102
 103         BT_DBG("bfusb %p", data);
 104
 105         skb = skb_dequeue(&data->completed_q);
 106         if (skb) {
 107                 urb = ((struct bfusb_data_scb *) skb->cb)->urb;
 108                 kfree_skb(skb);
 109         }
 110
 111         return urb;
 112 }
 113
 114 static void bfusb_unlink_urbs(struct bfusb_data *data)
 115 {
 116         struct sk_buff *skb;
 117         struct urb *urb;
 118
 119         BT_DBG("bfusb %p", data);
 120
 121         while ((skb = skb_dequeue(&data->pending_q))) {
 122                 urb = ((struct bfusb_data_scb *) skb->cb)->urb;
 123                 usb_kill_urb(urb);
 124                 skb_queue_tail(&data->completed_q, skb);
 125         }
 126
 127         while ((urb = bfusb_get_completed(data)))
 128                 usb_free_urb(urb);
 129 }
 130
 131 static int bfusb_send_bulk(struct bfusb_data *data, struct sk_buff *skb)
 132 {
 133         struct bfusb_data_scb *scb = (void *) skb->cb;
 134         struct urb *urb = bfusb_get_completed(data);
 135         int err, pipe;
 136
 137         BT_DBG("bfusb %p skb %p len %d", data, skb, skb->len);
 138
 139         if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
 140                 return -ENOMEM;
 141
 142         pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
 143
 144         usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, skb->len,
 145                         bfusb_tx_complete, skb);
 146
 147         scb->urb = urb;
 148
 149         skb_queue_tail(&data->pending_q, skb);
 150
 151         err = usb_submit_urb(urb, GFP_ATOMIC);
 152         if (err) {
 153                 BT_ERR("%s bulk tx submit failed urb %p err %d",
 154                                         data->hdev->name, urb, err);
 155                 skb_unlink(skb, &data->pending_q);
 156                 usb_free_urb(urb);
 157         } else
 158                 atomic_inc(&data->pending_tx);
 159
 160         return err;
 161 }
 162
 163 static void bfusb_tx_wakeup(struct bfusb_data *data)
 164 {
 165         struct sk_buff *skb;
 166
 167         BT_DBG("bfusb %p", data);
 168
 169         if (test_and_set_bit(BFUSB_TX_PROCESS, &data->state)) {
 170                 set_bit(BFUSB_TX_WAKEUP, &data->state);
 171                 return;
 172         }
 173
 174         do {
 175                 clear_bit(BFUSB_TX_WAKEUP, &data->state);
 176
 177                 while ((atomic_read(&data->pending_tx) < BFUSB_MAX_BULK_TX) &&
 178                                 (skb = skb_dequeue(&data->transmit_q))) {
 179                         if (bfusb_send_bulk(data, skb) < 0) {
 180                                 skb_queue_head(&data->transmit_q, skb);
 181                                 break;
 182                         }
 183                 }
 184
 185         } while (test_bit(BFUSB_TX_WAKEUP, &data->state));
 186
 187         clear_bit(BFUSB_TX_PROCESS, &data->state);
 188 }
 189
 190 static void bfusb_tx_complete(struct urb *urb)
 191 {
 192         struct sk_buff *skb = (struct sk_buff *) urb->context;
 193         struct bfusb_data *data = (struct bfusb_data *) skb->dev;
 194
 195         BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
 196
 197         atomic_dec(&data->pending_tx);
 198
 199         if (!test_bit(HCI_RUNNING, &data->hdev->flags))
 200                 return;
 201
 202         if (!urb->status)
 203                 data->hdev->stat.byte_tx += skb->len;
 204         else
 205                 data->hdev->stat.err_tx++;
 206
 207         read_lock(&data->lock);
 208
 209         skb_unlink(skb, &data->pending_q);
 210         skb_queue_tail(&data->completed_q, skb);
 211
 212         bfusb_tx_wakeup(data);
 213
 214         read_unlock(&data->lock);
 215 }
 216
 217
 218 static int bfusb_rx_submit(struct bfusb_data *data, struct urb *urb)
 219 {
 220         struct bfusb_data_scb *scb;
 221         struct sk_buff *skb;
 222         int err, pipe, size = HCI_MAX_FRAME_SIZE + 32;
 223
 224         BT_DBG("bfusb %p urb %p", bfusb, urb);
 225
 226         if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
 227                 return -ENOMEM;
 228
 229         skb = bt_skb_alloc(size, GFP_ATOMIC);
 230         if (!skb) {
 231                 usb_free_urb(urb);
 232                 return -ENOMEM;
 233         }
 234
 235         skb->dev = (void *) data;
 236
 237         scb = (struct bfusb_data_scb *) skb->cb;
 238         scb->urb = urb;
 239
 240         pipe = usb_rcvbulkpipe(data->udev, data->bulk_in_ep);
 241
 242         usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, size,
 243                         bfusb_rx_complete, skb);
 244
 245         skb_queue_tail(&data->pending_q, skb);
 246
 247         err = usb_submit_urb(urb, GFP_ATOMIC);
 248         if (err) {
 249                 BT_ERR("%s bulk rx submit failed urb %p err %d",
 250                                         data->hdev->name, urb, err);
 251                 skb_unlink(skb, &data->pending_q);
 252                 kfree_skb(skb);
 253                 usb_free_urb(urb);
 254         }
 255
 256         return err;
 257 }
 258
 259 static inline int bfusb_recv_block(struct bfusb_data *data, int hdr, unsigned char *buf, int len)
 260 {
 261         BT_DBG("bfusb %p hdr 0x%02x data %p len %d", data, hdr, buf, len);
 262
 263         if (hdr & 0x10) {
 264                 BT_ERR("%s error in block", data->hdev->name);
 265                 if (data->reassembly)
 266                         kfree_skb(data->reassembly);
 267                 data->reassembly = NULL;
 268                 return -EIO;
 269         }
 270
 271         if (hdr & 0x04) {
 272                 struct sk_buff *skb;
 273                 unsigned char pkt_type;
 274                 int pkt_len = 0;
 275
 276                 if (data->reassembly) {
 277                         BT_ERR("%s unexpected start block", data->hdev->name);
 278                         kfree_skb(data->reassembly);
 279                         data->reassembly = NULL;
 280                 }
 281
 282                 if (len < 1) {
 283                         BT_ERR("%s no packet type found", data->hdev->name);
 284                         return -EPROTO;
 285                 }
 286
 287                 pkt_type = *buf++; len--;
 288
 289                 switch (pkt_type) {
 290                 case HCI_EVENT_PKT:
 291                         if (len >= HCI_EVENT_HDR_SIZE) {
 292                                 struct hci_event_hdr *hdr = (struct hci_event_hdr *) buf;
 293                                 pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen;
 294                         } else {
 295                                 BT_ERR("%s event block is too short", data->hdev->name);
 296                                 return -EILSEQ;
 297                         }
 298                         break;
 299
 300                 case HCI_ACLDATA_PKT:
 301                         if (len >= HCI_ACL_HDR_SIZE) {
 302                                 struct hci_acl_hdr *hdr = (struct hci_acl_hdr *) buf;
 303                                 pkt_len = HCI_ACL_HDR_SIZE + __le16_to_cpu(hdr->dlen);
 304                         } else {
 305                                 BT_ERR("%s data block is too short", data->hdev->name);
 306                                 return -EILSEQ;
 307                         }
 308                         break;
 309
 310                 case HCI_SCODATA_PKT:
 311                         if (len >= HCI_SCO_HDR_SIZE) {
 312                                 struct hci_sco_hdr *hdr = (struct hci_sco_hdr *) buf;
 313                                 pkt_len = HCI_SCO_HDR_SIZE + hdr->dlen;
 314                         } else {
 315                                 BT_ERR("%s audio block is too short", data->hdev->name);
 316                                 return -EILSEQ;
 317                         }
 318                         break;
 319                 }
 320
 321                 skb = bt_skb_alloc(pkt_len, GFP_ATOMIC);
 322                 if (!skb) {
 323                         BT_ERR("%s no memory for the packet", data->hdev->name);
 324                         return -ENOMEM;
 325                 }
 326
 327                 skb->dev = (void *) data->hdev;
 328                 bt_cb(skb)->pkt_type = pkt_type;
 329
 330                 data->reassembly = skb;
 331         } else {
 332                 if (!data->reassembly) {
 333                         BT_ERR("%s unexpected continuation block", data->hdev->name);
 334                         return -EIO;
 335                 }
 336         }
 337
 338         if (len > 0)
 339                 memcpy(skb_put(data->reassembly, len), buf, len);
 340
 341         if (hdr & 0x08) {
 342                 hci_recv_frame(data->reassembly);
 343                 data->reassembly = NULL;
 344         }
 345
 346         return 0;
 347 }
 348
 349 static void bfusb_rx_complete(struct urb *urb)
 350 {
 351         struct sk_buff *skb = (struct sk_buff *) urb->context;
 352         struct bfusb_data *data = (struct bfusb_data *) skb->dev;
 353         unsigned char *buf = urb->transfer_buffer;
 354         int count = urb->actual_length;
 355         int err, hdr, len;
 356
 357         BT_DBG("bfusb %p urb %p skb %p len %d", bfusb, urb, skb, skb->len);
 358
 359         read_lock(&data->lock);
 360
 361         if (!test_bit(HCI_RUNNING, &data->hdev->flags))
 362                 goto unlock;
 363
 364         if (urb->status || !count)
 365                 goto resubmit;
 366
 367         data->hdev->stat.byte_rx += count;
 368
 369         skb_put(skb, count);
 370
 371         while (count) {
 372                 hdr = buf[0] | (buf[1] << 8);
 373
 374                 if (hdr & 0x4000) {
 375                         len = 0;
 376                         count -= 2;
 377                         buf   += 2;
 378                 } else {
 379                         len = (buf[2] == 0) ? 256 : buf[2];
 380                         count -= 3;
 381                         buf   += 3;
 382                 }
 383
 384                 if (count < len) {
 385                         BT_ERR("%s block extends over URB buffer ranges",
 386                                         data->hdev->name);
 387                 }
 388
 389                 if ((hdr & 0xe1) == 0xc1)
 390                         bfusb_recv_block(data, hdr, buf, len);
 391
 392                 count -= len;
 393                 buf   += len;
 394         }
 395
 396         skb_unlink(skb, &data->pending_q);
 397         kfree_skb(skb);
 398
 399         bfusb_rx_submit(data, urb);
 400
 401         read_unlock(&data->lock);
 402
 403         return;
 404
 405 resubmit:
 406         urb->dev = data->udev;
 407
 408         err = usb_submit_urb(urb, GFP_ATOMIC);
 409         if (err) {
 410                 BT_ERR("%s bulk resubmit failed urb %p err %d",
 411                                         data->hdev->name, urb, err);
 412         }
 413
 414 unlock:
 415         read_unlock(&data->lock);
 416 }
 417
 418 static int bfusb_open(struct hci_dev *hdev)
 419 {
 420         struct bfusb_data *data = hdev->driver_data;
 421         unsigned long flags;
 422         int i, err;
 423
 424         BT_DBG("hdev %p bfusb %p", hdev, data);
 425
 426         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
 427                 return 0;
 428
 429         write_lock_irqsave(&data->lock, flags);
 430
 431         err = bfusb_rx_submit(data, NULL);
 432         if (!err) {
 433                 for (i = 1; i < BFUSB_MAX_BULK_RX; i++)
 434                         bfusb_rx_submit(data, NULL);
 435         } else {
 436                 clear_bit(HCI_RUNNING, &hdev->flags);
 437         }
 438
 439         write_unlock_irqrestore(&data->lock, flags);
 440
 441         return err;
 442 }
 443
 444 static int bfusb_flush(struct hci_dev *hdev)
 445 {
 446         struct bfusb_data *data = hdev->driver_data;
 447
 448         BT_DBG("hdev %p bfusb %p", hdev, data);
 449
 450         skb_queue_purge(&data->transmit_q);
 451
 452         return 0;
 453 }
 454
 455 static int bfusb_close(struct hci_dev *hdev)
 456 {
 457         struct bfusb_data *data = hdev->driver_data;
 458         unsigned long flags;
 459
 460         BT_DBG("hdev %p bfusb %p", hdev, data);
 461
 462         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 463                 return 0;
 464
 465         write_lock_irqsave(&data->lock, flags);
 466         write_unlock_irqrestore(&data->lock, flags);
 467
 468         bfusb_unlink_urbs(data);
 469         bfusb_flush(hdev);
 470
 471         return 0;
 472 }
 473
 474 static int bfusb_send_frame(struct sk_buff *skb)
 475 {
 476         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 477         struct bfusb_data *data;
 478         struct sk_buff *nskb;
 479         unsigned char buf[3];
 480         int sent = 0, size, count;
 481
 482         BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, bt_cb(skb)->pkt_type, skb->len);
 483
 484         if (!hdev) {
 485                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
 486                 return -ENODEV;
 487         }
 488
 489         if (!test_bit(HCI_RUNNING, &hdev->flags))
 490                 return -EBUSY;
 491
 492         data = hdev->driver_data;
 493
 494         switch (bt_cb(skb)->pkt_type) {
 495         case HCI_COMMAND_PKT:
 496                 hdev->stat.cmd_tx++;
 497                 break;
 498         case HCI_ACLDATA_PKT:
 499                 hdev->stat.acl_tx++;
 500                 break;
 501         case HCI_SCODATA_PKT:
 502                 hdev->stat.sco_tx++;
 503                 break;
 504         };
 505
 506         /* Prepend skb with frame type */
 507         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
 508
 509         count = skb->len;
 510
 511         /* Max HCI frame size seems to be 1511 + 1 */
 512         nskb = bt_skb_alloc(count + 32, GFP_ATOMIC);
 513         if (!nskb) {
 514                 BT_ERR("Can't allocate memory for new packet");
 515                 return -ENOMEM;
 516         }
 517
 518         nskb->dev = (void *) data;
 519
 520         while (count) {
 521                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE);
 522
 523                 buf[0] = 0xc1 | ((sent == 0) ? 0x04 : 0) | ((count == size) ? 0x08 : 0);
 524                 buf[1] = 0x00;
 525                 buf[2] = (size == BFUSB_MAX_BLOCK_SIZE) ? 0 : size;
 526
 527                 memcpy(skb_put(nskb, 3), buf, 3);
 528                 skb_copy_from_linear_data_offset(skb, sent, skb_put(nskb, size), size);
 529
 530                 sent  += size;
 531                 count -= size;
 532         }
 533
 534         /* Don't send frame with multiple size of bulk max packet */
 535         if ((nskb->len % data->bulk_pkt_size) == 0) {
 536                 buf[0] = 0xdd;
 537                 buf[1] = 0x00;
 538                 memcpy(skb_put(nskb, 2), buf, 2);
 539         }
 540
 541         read_lock(&data->lock);
 542
 543         skb_queue_tail(&data->transmit_q, nskb);
 544         bfusb_tx_wakeup(data);
 545
 546         read_unlock(&data->lock);
 547
 548         kfree_skb(skb);
 549
 550         return 0;
 551 }
 552
 553 static void bfusb_destruct(struct hci_dev *hdev)
 554 {
 555         struct bfusb_data *data = hdev->driver_data;
 556
 557         BT_DBG("hdev %p bfusb %p", hdev, data);
 558
 559         kfree(data);
 560 }
 561
 562 static int bfusb_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
 563 {
 564         return -ENOIOCTLCMD;
 565 }
 566
 567 static int bfusb_load_firmware(struct bfusb_data *data,
 568                                const unsigned char *firmware, int count)
 569 {
 570         unsigned char *buf;
 571         int err, pipe, len, size, sent = 0;
 572
 573         BT_DBG("bfusb %p udev %p", data, data->udev);
 574
 575         BT_INFO("BlueFRITZ! USB loading firmware");
 576
 577         pipe = usb_sndctrlpipe(data->udev, 0);
 578
 579         if (usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 580                                 0, 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT) < 0) {
 581                 BT_ERR("Can't change to loading configuration");
 582                 return -EBUSY;
 583         }
 584
 585         data->udev->toggle[0] = data->udev->toggle[1] = 0;
 586
 587         buf = kmalloc(BFUSB_MAX_BLOCK_SIZE + 3, GFP_ATOMIC);
 588         if (!buf) {
 589                 BT_ERR("Can't allocate memory chunk for firmware");
 590                 return -ENOMEM;
 591         }
 592
 593         pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
 594
 595         while (count) {
 596                 size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE + 3);
 597
 598                 memcpy(buf, firmware + sent, size);
 599
 600                 err = usb_bulk_msg(data->udev, pipe, buf, size,
 601                                         &len, BFUSB_BLOCK_TIMEOUT);
 602
 603                 if (err || (len != size)) {
 604                         BT_ERR("Error in firmware loading");
 605                         goto error;
 606                 }
 607
 608                 sent  += size;
 609                 count -= size;
 610         }
 611
 612         err = usb_bulk_msg(data->udev, pipe, NULL, 0,
 613                                         &len, BFUSB_BLOCK_TIMEOUT);
 614         if (err < 0) {
 615                 BT_ERR("Error in null packet request");
 616                 goto error;
 617         }
 618
 619         pipe = usb_sndctrlpipe(data->udev, 0);
 620
 621         err = usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 622                                 0, 2, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 623         if (err < 0) {
 624                 BT_ERR("Can't change to running configuration");
 625                 goto error;
 626         }
 627
 628         data->udev->toggle[0] = data->udev->toggle[1] = 0;
 629
 630         BT_INFO("BlueFRITZ! USB device ready");
 631
 632         kfree(buf);
 633         return 0;
 634
 635 error:
 636         kfree(buf);
 637
 638         pipe = usb_sndctrlpipe(data->udev, 0);
 639
 640         usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 641                                 0, 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 642
 643         return err;
 644 }
 645
 646 static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 647 {
 648         const struct firmware *firmware;
 649         struct usb_device *udev = interface_to_usbdev(intf);
 650         struct usb_host_endpoint *bulk_out_ep;
 651         struct usb_host_endpoint *bulk_in_ep;
 652         struct hci_dev *hdev;
 653         struct bfusb_data *data;
 654
 655         BT_DBG("intf %p id %p", intf, id);
 656
 657         /* Check number of endpoints */
 658         if (intf->cur_altsetting->desc.bNumEndpoints < 2)
 659                 return -EIO;
 660
 661         bulk_out_ep = &intf->cur_altsetting->endpoint[0];
 662         bulk_in_ep  = &intf->cur_altsetting->endpoint[1];
 663
 664         if (!bulk_out_ep || !bulk_in_ep) {
 665                 BT_ERR("Bulk endpoints not found");
 666                 goto done;
 667         }
 668
 669         /* Initialize control structure and load firmware */
 670         data = kzalloc(sizeof(struct bfusb_data), GFP_KERNEL);
 671         if (!data) {
 672                 BT_ERR("Can't allocate memory for control structure");
 673                 goto done;
 674         }
 675
 676         data->udev = udev;
 677         data->bulk_in_ep    = bulk_in_ep->desc.bEndpointAddress;
 678         data->bulk_out_ep   = bulk_out_ep->desc.bEndpointAddress;
 679         data->bulk_pkt_size = le16_to_cpu(bulk_out_ep->desc.wMaxPacketSize);
 680
 681         rwlock_init(&data->lock);
 682
 683         data->reassembly = NULL;
 684
 685         skb_queue_head_init(&data->transmit_q);
 686         skb_queue_head_init(&data->pending_q);
 687         skb_queue_head_init(&data->completed_q);
 688
 689         if (request_firmware(&firmware, "bfubase.frm", &udev->dev) < 0) {
 690                 BT_ERR("Firmware request failed");
 691                 goto error;
 692         }
 693
 694         BT_DBG("firmware data %p size %d", firmware->data, firmware->size);
 695
 696         if (bfusb_load_firmware(data, firmware->data, firmware->size) < 0) {
 697                 BT_ERR("Firmware loading failed");
 698                 goto release;
 699         }
 700
 701         release_firmware(firmware);
 702
 703         /* Initialize and register HCI device */
 704         hdev = hci_alloc_dev();
 705         if (!hdev) {
 706                 BT_ERR("Can't allocate HCI device");
 707                 goto error;
 708         }
 709
 710         data->hdev = hdev;
 711
 712         hdev->type = HCI_USB;
 713         hdev->driver_data = data;
 714         SET_HCIDEV_DEV(hdev, &intf->dev);
 715
 716         hdev->open     = bfusb_open;
 717         hdev->close    = bfusb_close;
 718         hdev->flush    = bfusb_flush;
 719         hdev->send     = bfusb_send_frame;
 720         hdev->destruct = bfusb_destruct;
 721         hdev->ioctl    = bfusb_ioctl;
 722
 723         hdev->owner = THIS_MODULE;
 724
 725         if (hci_register_dev(hdev) < 0) {
 726                 BT_ERR("Can't register HCI device");
 727                 hci_free_dev(hdev);
 728                 goto error;
 729         }
 730
 731         usb_set_intfdata(intf, data);
 732
 733         return 0;
 734
 735 release:
 736         release_firmware(firmware);
 737
 738 error:
 739         kfree(data);
 740
 741 done:
 742         return -EIO;
 743 }
 744
 745 static void bfusb_disconnect(struct usb_interface *intf)
 746 {
 747         struct bfusb_data *data = usb_get_intfdata(intf);
 748         struct hci_dev *hdev = data->hdev;
 749
 750         BT_DBG("intf %p", intf);
 751
 752         if (!hdev)
 753                 return;
 754
 755         usb_set_intfdata(intf, NULL);
 756
 757         bfusb_close(hdev);
 758
 759         if (hci_unregister_dev(hdev) < 0)
 760                 BT_ERR("Can't unregister HCI device %s", hdev->name);
 761
 762         hci_free_dev(hdev);
 763 }
 764
 765 static struct usb_driver bfusb_driver = {
 766         .name           = "bfusb",
 767         .probe          = bfusb_probe,
 768         .disconnect     = bfusb_disconnect,
 769         .id_table       = bfusb_table,
 770 };
 771
 772 static int __init bfusb_init(void)
 773 {
 774         int err;
 775
 776         BT_INFO("BlueFRITZ! USB driver ver %s", VERSION);
 777
 778         err = usb_register(&bfusb_driver);
 779         if (err < 0)
 780                 BT_ERR("Failed to register BlueFRITZ! USB driver");
 781
 782         return err;
 783 }
 784
 785 static void __exit bfusb_exit(void)
 786 {
 787         usb_deregister(&bfusb_driver);
 788 }
 789
 790 module_init(bfusb_init);
 791 module_exit(bfusb_exit);
 792
 793 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 794 MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION);
 795 MODULE_VERSION(VERSION);
 796 MODULE_LICENSE("GPL");
 797 MODULE_FIRMWARE("bfubase.frm");