linux/drivers/bluetooth/bfusb.c
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   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
  43static struct usb_driver bfusb_driver;
  44
  45static const struct usb_device_id bfusb_table[] = {
  46        /* AVM BlueFRITZ! USB */
  47        { USB_DEVICE(0x057c, 0x2200) },
  48
  49        { }     /* Terminating entry */
  50};
  51
  52MODULE_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
  64struct 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
  86struct bfusb_data_scb {
  87        struct urb *urb;
  88};
  89
  90static void bfusb_tx_complete(struct urb *urb);
  91static void bfusb_rx_complete(struct urb *urb);
  92
  93static 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
 109static 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
 126static 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
 158static 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
 185static 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
 213static 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
 254static 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
 342static 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
 398resubmit:
 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
 407unlock:
 408        read_unlock(&data->lock);
 409}
 410
 411static 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
 437static 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
 448static 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
 467static 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
 538static 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
 607error:
 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
 618static 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
 703release:
 704        release_firmware(firmware);
 705
 706done:
 707        return -EIO;
 708}
 709
 710static 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
 728static 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
 736module_usb_driver(bfusb_driver);
 737
 738MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 739MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION);
 740MODULE_VERSION(VERSION);
 741MODULE_LICENSE("GPL");
 742MODULE_FIRMWARE("bfubase.frm");
 743
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