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 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                skb->dev = (void *) data->hdev;
 322                bt_cb(skb)->pkt_type = pkt_type;
 323
 324                data->reassembly = skb;
 325        } else {
 326                if (!data->reassembly) {
 327                        BT_ERR("%s unexpected continuation block", data->hdev->name);
 328                        return -EIO;
 329                }
 330        }
 331
 332        if (len > 0)
 333                memcpy(skb_put(data->reassembly, len), buf, len);
 334
 335        if (hdr & 0x08) {
 336                hci_recv_frame(data->reassembly);
 337                data->reassembly = NULL;
 338        }
 339
 340        return 0;
 341}
 342
 343static void bfusb_rx_complete(struct urb *urb)
 344{
 345        struct sk_buff *skb = (struct sk_buff *) urb->context;
 346        struct bfusb_data *data = (struct bfusb_data *) skb->dev;
 347        unsigned char *buf = urb->transfer_buffer;
 348        int count = urb->actual_length;
 349        int err, hdr, len;
 350
 351        BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
 352
 353        read_lock(&data->lock);
 354
 355        if (!test_bit(HCI_RUNNING, &data->hdev->flags))
 356                goto unlock;
 357
 358        if (urb->status || !count)
 359                goto resubmit;
 360
 361        data->hdev->stat.byte_rx += count;
 362
 363        skb_put(skb, count);
 364
 365        while (count) {
 366                hdr = buf[0] | (buf[1] << 8);
 367
 368                if (hdr & 0x4000) {
 369                        len = 0;
 370                        count -= 2;
 371                        buf   += 2;
 372                } else {
 373                        len = (buf[2] == 0) ? 256 : buf[2];
 374                        count -= 3;
 375                        buf   += 3;
 376                }
 377
 378                if (count < len) {
 379                        BT_ERR("%s block extends over URB buffer ranges",
 380                                        data->hdev->name);
 381                }
 382
 383                if ((hdr & 0xe1) == 0xc1)
 384                        bfusb_recv_block(data, hdr, buf, len);
 385
 386                count -= len;
 387                buf   += len;
 388        }
 389
 390        skb_unlink(skb, &data->pending_q);
 391        kfree_skb(skb);
 392
 393        bfusb_rx_submit(data, urb);
 394
 395        read_unlock(&data->lock);
 396
 397        return;
 398
 399resubmit:
 400        urb->dev = data->udev;
 401
 402        err = usb_submit_urb(urb, GFP_ATOMIC);
 403        if (err) {
 404                BT_ERR("%s bulk resubmit failed urb %p err %d",
 405                                        data->hdev->name, urb, err);
 406        }
 407
 408unlock:
 409        read_unlock(&data->lock);
 410}
 411
 412static int bfusb_open(struct hci_dev *hdev)
 413{
 414        struct bfusb_data *data = hci_get_drvdata(hdev);
 415        unsigned long flags;
 416        int i, err;
 417
 418        BT_DBG("hdev %p bfusb %p", hdev, data);
 419
 420        if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
 421                return 0;
 422
 423        write_lock_irqsave(&data->lock, flags);
 424
 425        err = bfusb_rx_submit(data, NULL);
 426        if (!err) {
 427                for (i = 1; i < BFUSB_MAX_BULK_RX; i++)
 428                        bfusb_rx_submit(data, NULL);
 429        } else {
 430                clear_bit(HCI_RUNNING, &hdev->flags);
 431        }
 432
 433        write_unlock_irqrestore(&data->lock, flags);
 434
 435        return err;
 436}
 437
 438static int bfusb_flush(struct hci_dev *hdev)
 439{
 440        struct bfusb_data *data = hci_get_drvdata(hdev);
 441
 442        BT_DBG("hdev %p bfusb %p", hdev, data);
 443
 444        skb_queue_purge(&data->transmit_q);
 445
 446        return 0;
 447}
 448
 449static int bfusb_close(struct hci_dev *hdev)
 450{
 451        struct bfusb_data *data = hci_get_drvdata(hdev);
 452        unsigned long flags;
 453
 454        BT_DBG("hdev %p bfusb %p", hdev, data);
 455
 456        if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 457                return 0;
 458
 459        write_lock_irqsave(&data->lock, flags);
 460        write_unlock_irqrestore(&data->lock, flags);
 461
 462        bfusb_unlink_urbs(data);
 463        bfusb_flush(hdev);
 464
 465        return 0;
 466}
 467
 468static int bfusb_send_frame(struct sk_buff *skb)
 469{
 470        struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 471        struct bfusb_data *data;
 472        struct sk_buff *nskb;
 473        unsigned char buf[3];
 474        int sent = 0, size, count;
 475
 476        BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, bt_cb(skb)->pkt_type, skb->len);
 477
 478        if (!hdev) {
 479                BT_ERR("Frame for unknown HCI device (hdev=NULL)");
 480                return -ENODEV;
 481        }
 482
 483        if (!test_bit(HCI_RUNNING, &hdev->flags))
 484                return -EBUSY;
 485
 486        data = hci_get_drvdata(hdev);
 487
 488        switch (bt_cb(skb)->pkt_type) {
 489        case HCI_COMMAND_PKT:
 490                hdev->stat.cmd_tx++;
 491                break;
 492        case HCI_ACLDATA_PKT:
 493                hdev->stat.acl_tx++;
 494                break;
 495        case HCI_SCODATA_PKT:
 496                hdev->stat.sco_tx++;
 497                break;
 498        };
 499
 500        /* Prepend skb with frame type */
 501        memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
 502
 503        count = skb->len;
 504
 505        /* Max HCI frame size seems to be 1511 + 1 */
 506        nskb = bt_skb_alloc(count + 32, GFP_ATOMIC);
 507        if (!nskb) {
 508                BT_ERR("Can't allocate memory for new packet");
 509                return -ENOMEM;
 510        }
 511
 512        nskb->dev = (void *) data;
 513
 514        while (count) {
 515                size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE);
 516
 517                buf[0] = 0xc1 | ((sent == 0) ? 0x04 : 0) | ((count == size) ? 0x08 : 0);
 518                buf[1] = 0x00;
 519                buf[2] = (size == BFUSB_MAX_BLOCK_SIZE) ? 0 : size;
 520
 521                memcpy(skb_put(nskb, 3), buf, 3);
 522                skb_copy_from_linear_data_offset(skb, sent, skb_put(nskb, size), size);
 523
 524                sent  += size;
 525                count -= size;
 526        }
 527
 528        /* Don't send frame with multiple size of bulk max packet */
 529        if ((nskb->len % data->bulk_pkt_size) == 0) {
 530                buf[0] = 0xdd;
 531                buf[1] = 0x00;
 532                memcpy(skb_put(nskb, 2), buf, 2);
 533        }
 534
 535        read_lock(&data->lock);
 536
 537        skb_queue_tail(&data->transmit_q, nskb);
 538        bfusb_tx_wakeup(data);
 539
 540        read_unlock(&data->lock);
 541
 542        kfree_skb(skb);
 543
 544        return 0;
 545}
 546
 547static int bfusb_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
 548{
 549        return -ENOIOCTLCMD;
 550}
 551
 552static int bfusb_load_firmware(struct bfusb_data *data,
 553                               const unsigned char *firmware, int count)
 554{
 555        unsigned char *buf;
 556        int err, pipe, len, size, sent = 0;
 557
 558        BT_DBG("bfusb %p udev %p", data, data->udev);
 559
 560        BT_INFO("BlueFRITZ! USB loading firmware");
 561
 562        buf = kmalloc(BFUSB_MAX_BLOCK_SIZE + 3, GFP_KERNEL);
 563        if (!buf) {
 564                BT_ERR("Can't allocate memory chunk for firmware");
 565                return -ENOMEM;
 566        }
 567
 568        pipe = usb_sndctrlpipe(data->udev, 0);
 569
 570        if (usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 571                                0, 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT) < 0) {
 572                BT_ERR("Can't change to loading configuration");
 573                kfree(buf);
 574                return -EBUSY;
 575        }
 576
 577        data->udev->toggle[0] = data->udev->toggle[1] = 0;
 578
 579        pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
 580
 581        while (count) {
 582                size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE + 3);
 583
 584                memcpy(buf, firmware + sent, size);
 585
 586                err = usb_bulk_msg(data->udev, pipe, buf, size,
 587                                        &len, BFUSB_BLOCK_TIMEOUT);
 588
 589                if (err || (len != size)) {
 590                        BT_ERR("Error in firmware loading");
 591                        goto error;
 592                }
 593
 594                sent  += size;
 595                count -= size;
 596        }
 597
 598        err = usb_bulk_msg(data->udev, pipe, NULL, 0,
 599                                        &len, BFUSB_BLOCK_TIMEOUT);
 600        if (err < 0) {
 601                BT_ERR("Error in null packet request");
 602                goto error;
 603        }
 604
 605        pipe = usb_sndctrlpipe(data->udev, 0);
 606
 607        err = usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 608                                0, 2, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 609        if (err < 0) {
 610                BT_ERR("Can't change to running configuration");
 611                goto error;
 612        }
 613
 614        data->udev->toggle[0] = data->udev->toggle[1] = 0;
 615
 616        BT_INFO("BlueFRITZ! USB device ready");
 617
 618        kfree(buf);
 619        return 0;
 620
 621error:
 622        kfree(buf);
 623
 624        pipe = usb_sndctrlpipe(data->udev, 0);
 625
 626        usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION,
 627                                0, 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 628
 629        return err;
 630}
 631
 632static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 633{
 634        const struct firmware *firmware;
 635        struct usb_device *udev = interface_to_usbdev(intf);
 636        struct usb_host_endpoint *bulk_out_ep;
 637        struct usb_host_endpoint *bulk_in_ep;
 638        struct hci_dev *hdev;
 639        struct bfusb_data *data;
 640
 641        BT_DBG("intf %p id %p", intf, id);
 642
 643        /* Check number of endpoints */
 644        if (intf->cur_altsetting->desc.bNumEndpoints < 2)
 645                return -EIO;
 646
 647        bulk_out_ep = &intf->cur_altsetting->endpoint[0];
 648        bulk_in_ep  = &intf->cur_altsetting->endpoint[1];
 649
 650        if (!bulk_out_ep || !bulk_in_ep) {
 651                BT_ERR("Bulk endpoints not found");
 652                goto done;
 653        }
 654
 655        /* Initialize control structure and load firmware */
 656        data = devm_kzalloc(&intf->dev, sizeof(struct bfusb_data), GFP_KERNEL);
 657        if (!data) {
 658                BT_ERR("Can't allocate memory for control structure");
 659                goto done;
 660        }
 661
 662        data->udev = udev;
 663        data->bulk_in_ep    = bulk_in_ep->desc.bEndpointAddress;
 664        data->bulk_out_ep   = bulk_out_ep->desc.bEndpointAddress;
 665        data->bulk_pkt_size = le16_to_cpu(bulk_out_ep->desc.wMaxPacketSize);
 666
 667        rwlock_init(&data->lock);
 668
 669        data->reassembly = NULL;
 670
 671        skb_queue_head_init(&data->transmit_q);
 672        skb_queue_head_init(&data->pending_q);
 673        skb_queue_head_init(&data->completed_q);
 674
 675        if (request_firmware(&firmware, "bfubase.frm", &udev->dev) < 0) {
 676                BT_ERR("Firmware request failed");
 677                goto done;
 678        }
 679
 680        BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);
 681
 682        if (bfusb_load_firmware(data, firmware->data, firmware->size) < 0) {
 683                BT_ERR("Firmware loading failed");
 684                goto release;
 685        }
 686
 687        release_firmware(firmware);
 688
 689        /* Initialize and register HCI device */
 690        hdev = hci_alloc_dev();
 691        if (!hdev) {
 692                BT_ERR("Can't allocate HCI device");
 693                goto done;
 694        }
 695
 696        data->hdev = hdev;
 697
 698        hdev->bus = HCI_USB;
 699        hci_set_drvdata(hdev, data);
 700        SET_HCIDEV_DEV(hdev, &intf->dev);
 701
 702        hdev->open     = bfusb_open;
 703        hdev->close    = bfusb_close;
 704        hdev->flush    = bfusb_flush;
 705        hdev->send     = bfusb_send_frame;
 706        hdev->ioctl    = bfusb_ioctl;
 707
 708        if (hci_register_dev(hdev) < 0) {
 709                BT_ERR("Can't register HCI device");
 710                hci_free_dev(hdev);
 711                goto done;
 712        }
 713
 714        usb_set_intfdata(intf, data);
 715
 716        return 0;
 717
 718release:
 719        release_firmware(firmware);
 720
 721done:
 722        return -EIO;
 723}
 724
 725static void bfusb_disconnect(struct usb_interface *intf)
 726{
 727        struct bfusb_data *data = usb_get_intfdata(intf);
 728        struct hci_dev *hdev = data->hdev;
 729
 730        BT_DBG("intf %p", intf);
 731
 732        if (!hdev)
 733                return;
 734
 735        usb_set_intfdata(intf, NULL);
 736
 737        bfusb_close(hdev);
 738
 739        hci_unregister_dev(hdev);
 740        hci_free_dev(hdev);
 741}
 742
 743static struct usb_driver bfusb_driver = {
 744        .name           = "bfusb",
 745        .probe          = bfusb_probe,
 746        .disconnect     = bfusb_disconnect,
 747        .id_table       = bfusb_table,
 748        .disable_hub_initiated_lpm = 1,
 749};
 750
 751module_usb_driver(bfusb_driver);
 752
 753MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 754MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION);
 755MODULE_VERSION(VERSION);
 756MODULE_LICENSE("GPL");
 757MODULE_FIRMWARE("bfubase.frm");
 758
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