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