drivers/bluetooth/btusb.c

   1 /*
   2  *
   3  *  Generic Bluetooth USB driver
   4  *
   5  *  Copyright (C) 2005-2008  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/kernel.h>
  25 #include <linux/module.h>
  26 #include <linux/init.h>
  27 #include <linux/slab.h>
  28 #include <linux/types.h>
  29 #include <linux/sched.h>
  30 #include <linux/errno.h>
  31 #include <linux/skbuff.h>
  32
  33 #include <linux/usb.h>
  34
  35 #include <net/bluetooth/bluetooth.h>
  36 #include <net/bluetooth/hci_core.h>
  37
  38 #define VERSION "0.6"
  39
  40 static int ignore_dga;
  41 static int ignore_csr;
  42 static int ignore_sniffer;
  43 static int disable_scofix;
  44 static int force_scofix;
  45
  46 static int reset = 1;
  47
  48 static struct usb_driver btusb_driver;
  49
  50 #define BTUSB_IGNORE            0x01
  51 #define BTUSB_DIGIANSWER        0x02
  52 #define BTUSB_CSR               0x04
  53 #define BTUSB_SNIFFER           0x08
  54 #define BTUSB_BCM92035          0x10
  55 #define BTUSB_BROKEN_ISOC       0x20
  56 #define BTUSB_WRONG_SCO_MTU     0x40
  57
  58 static struct usb_device_id btusb_table[] = {
  59         /* Generic Bluetooth USB device */
  60         { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
  61
  62         /* Apple iMac11,1 */
  63         { USB_DEVICE(0x05ac, 0x8215) },
  64
  65         /* Apple MacBookPro6,2 */
  66         { USB_DEVICE(0x05ac, 0x8218) },
  67
  68         /* AVM BlueFRITZ! USB v2.0 */
  69         { USB_DEVICE(0x057c, 0x3800) },
  70
  71         /* Bluetooth Ultraport Module from IBM */
  72         { USB_DEVICE(0x04bf, 0x030a) },
  73
  74         /* ALPS Modules with non-standard id */
  75         { USB_DEVICE(0x044e, 0x3001) },
  76         { USB_DEVICE(0x044e, 0x3002) },
  77
  78         /* Ericsson with non-standard id */
  79         { USB_DEVICE(0x0bdb, 0x1002) },
  80
  81         /* Canyon CN-BTU1 with HID interfaces */
  82         { USB_DEVICE(0x0c10, 0x0000) },
  83
  84         { }     /* Terminating entry */
  85 };
  86
  87 MODULE_DEVICE_TABLE(usb, btusb_table);
  88
  89 static struct usb_device_id blacklist_table[] = {
  90         /* CSR BlueCore devices */
  91         { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
  92
  93         /* Broadcom BCM2033 without firmware */
  94         { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
  95
  96         /* Broadcom BCM2035 */
  97         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
  98         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
  99         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
 100
 101         /* Broadcom BCM2045 */
 102         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
 103         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
 104
 105         /* IBM/Lenovo ThinkPad with Broadcom chip */
 106         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
 107         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
 108
 109         /* HP laptop with Broadcom chip */
 110         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
 111
 112         /* Dell laptop with Broadcom chip */
 113         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
 114
 115         /* Dell Wireless 370 and 410 devices */
 116         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
 117         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
 118
 119         /* Belkin F8T012 and F8T013 devices */
 120         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
 121         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
 122
 123         /* Asus WL-BTD202 device */
 124         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
 125
 126         /* Kensington Bluetooth USB adapter */
 127         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
 128
 129         /* RTX Telecom based adapters with buggy SCO support */
 130         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
 131         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
 132
 133         /* CONWISE Technology based adapters with buggy SCO support */
 134         { USB_DEVICE(0x0e5e, 0x6622), .driver_info = BTUSB_BROKEN_ISOC },
 135
 136         /* Digianswer devices */
 137         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
 138         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
 139
 140         /* CSR BlueCore Bluetooth Sniffer */
 141         { USB_DEVICE(0x0a12, 0x0002), .driver_info = BTUSB_SNIFFER },
 142
 143         /* Frontline ComProbe Bluetooth Sniffer */
 144         { USB_DEVICE(0x16d3, 0x0002), .driver_info = BTUSB_SNIFFER },
 145
 146         { }     /* Terminating entry */
 147 };
 148
 149 #define BTUSB_MAX_ISOC_FRAMES   10
 150
 151 #define BTUSB_INTR_RUNNING      0
 152 #define BTUSB_BULK_RUNNING      1
 153 #define BTUSB_ISOC_RUNNING      2
 154 #define BTUSB_SUSPENDING        3
 155 #define BTUSB_DID_ISO_RESUME    4
 156
 157 struct btusb_data {
 158         struct hci_dev       *hdev;
 159         struct usb_device    *udev;
 160         struct usb_interface *intf;
 161         struct usb_interface *isoc;
 162
 163         spinlock_t lock;
 164
 165         unsigned long flags;
 166
 167         struct work_struct work;
 168         struct work_struct waker;
 169
 170         struct usb_anchor tx_anchor;
 171         struct usb_anchor intr_anchor;
 172         struct usb_anchor bulk_anchor;
 173         struct usb_anchor isoc_anchor;
 174         struct usb_anchor deferred;
 175         int tx_in_flight;
 176         spinlock_t txlock;
 177
 178         struct usb_endpoint_descriptor *intr_ep;
 179         struct usb_endpoint_descriptor *bulk_tx_ep;
 180         struct usb_endpoint_descriptor *bulk_rx_ep;
 181         struct usb_endpoint_descriptor *isoc_tx_ep;
 182         struct usb_endpoint_descriptor *isoc_rx_ep;
 183
 184         __u8 cmdreq_type;
 185
 186         unsigned int sco_num;
 187         int isoc_altsetting;
 188         int suspend_count;
 189 };
 190
 191 static int inc_tx(struct btusb_data *data)
 192 {
 193         unsigned long flags;
 194         int rv;
 195
 196         spin_lock_irqsave(&data->txlock, flags);
 197         rv = test_bit(BTUSB_SUSPENDING, &data->flags);
 198         if (!rv)
 199                 data->tx_in_flight++;
 200         spin_unlock_irqrestore(&data->txlock, flags);
 201
 202         return rv;
 203 }
 204
 205 static void btusb_intr_complete(struct urb *urb)
 206 {
 207         struct hci_dev *hdev = urb->context;
 208         struct btusb_data *data = hdev->driver_data;
 209         int err;
 210
 211         BT_DBG("%s urb %p status %d count %d", hdev->name,
 212                                         urb, urb->status, urb->actual_length);
 213
 214         if (!test_bit(HCI_RUNNING, &hdev->flags))
 215                 return;
 216
 217         if (urb->status == 0) {
 218                 hdev->stat.byte_rx += urb->actual_length;
 219
 220                 if (hci_recv_fragment(hdev, HCI_EVENT_PKT,
 221                                                 urb->transfer_buffer,
 222                                                 urb->actual_length) < 0) {
 223                         BT_ERR("%s corrupted event packet", hdev->name);
 224                         hdev->stat.err_rx++;
 225                 }
 226         }
 227
 228         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
 229                 return;
 230
 231         usb_mark_last_busy(data->udev);
 232         usb_anchor_urb(urb, &data->intr_anchor);
 233
 234         err = usb_submit_urb(urb, GFP_ATOMIC);
 235         if (err < 0) {
 236                 BT_ERR("%s urb %p failed to resubmit (%d)",
 237                                                 hdev->name, urb, -err);
 238                 usb_unanchor_urb(urb);
 239         }
 240 }
 241
 242 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
 243 {
 244         struct btusb_data *data = hdev->driver_data;
 245         struct urb *urb;
 246         unsigned char *buf;
 247         unsigned int pipe;
 248         int err, size;
 249
 250         BT_DBG("%s", hdev->name);
 251
 252         if (!data->intr_ep)
 253                 return -ENODEV;
 254
 255         urb = usb_alloc_urb(0, mem_flags);
 256         if (!urb)
 257                 return -ENOMEM;
 258
 259         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
 260
 261         buf = kmalloc(size, mem_flags);
 262         if (!buf) {
 263                 usb_free_urb(urb);
 264                 return -ENOMEM;
 265         }
 266
 267         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
 268
 269         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
 270                                                 btusb_intr_complete, hdev,
 271                                                 data->intr_ep->bInterval);
 272
 273         urb->transfer_flags |= URB_FREE_BUFFER;
 274
 275         usb_anchor_urb(urb, &data->intr_anchor);
 276
 277         err = usb_submit_urb(urb, mem_flags);
 278         if (err < 0) {
 279                 BT_ERR("%s urb %p submission failed (%d)",
 280                                                 hdev->name, urb, -err);
 281                 usb_unanchor_urb(urb);
 282         }
 283
 284         usb_free_urb(urb);
 285
 286         return err;
 287 }
 288
 289 static void btusb_bulk_complete(struct urb *urb)
 290 {
 291         struct hci_dev *hdev = urb->context;
 292         struct btusb_data *data = hdev->driver_data;
 293         int err;
 294
 295         BT_DBG("%s urb %p status %d count %d", hdev->name,
 296                                         urb, urb->status, urb->actual_length);
 297
 298         if (!test_bit(HCI_RUNNING, &hdev->flags))
 299                 return;
 300
 301         if (urb->status == 0) {
 302                 hdev->stat.byte_rx += urb->actual_length;
 303
 304                 if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT,
 305                                                 urb->transfer_buffer,
 306                                                 urb->actual_length) < 0) {
 307                         BT_ERR("%s corrupted ACL packet", hdev->name);
 308                         hdev->stat.err_rx++;
 309                 }
 310         }
 311
 312         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
 313                 return;
 314
 315         usb_anchor_urb(urb, &data->bulk_anchor);
 316         usb_mark_last_busy(data->udev);
 317
 318         err = usb_submit_urb(urb, GFP_ATOMIC);
 319         if (err < 0) {
 320                 BT_ERR("%s urb %p failed to resubmit (%d)",
 321                                                 hdev->name, urb, -err);
 322                 usb_unanchor_urb(urb);
 323         }
 324 }
 325
 326 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
 327 {
 328         struct btusb_data *data = hdev->driver_data;
 329         struct urb *urb;
 330         unsigned char *buf;
 331         unsigned int pipe;
 332         int err, size = HCI_MAX_FRAME_SIZE;
 333
 334         BT_DBG("%s", hdev->name);
 335
 336         if (!data->bulk_rx_ep)
 337                 return -ENODEV;
 338
 339         urb = usb_alloc_urb(0, mem_flags);
 340         if (!urb)
 341                 return -ENOMEM;
 342
 343         buf = kmalloc(size, mem_flags);
 344         if (!buf) {
 345                 usb_free_urb(urb);
 346                 return -ENOMEM;
 347         }
 348
 349         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
 350
 351         usb_fill_bulk_urb(urb, data->udev, pipe,
 352                                         buf, size, btusb_bulk_complete, hdev);
 353
 354         urb->transfer_flags |= URB_FREE_BUFFER;
 355
 356         usb_mark_last_busy(data->udev);
 357         usb_anchor_urb(urb, &data->bulk_anchor);
 358
 359         err = usb_submit_urb(urb, mem_flags);
 360         if (err < 0) {
 361                 BT_ERR("%s urb %p submission failed (%d)",
 362                                                 hdev->name, urb, -err);
 363                 usb_unanchor_urb(urb);
 364         }
 365
 366         usb_free_urb(urb);
 367
 368         return err;
 369 }
 370
 371 static void btusb_isoc_complete(struct urb *urb)
 372 {
 373         struct hci_dev *hdev = urb->context;
 374         struct btusb_data *data = hdev->driver_data;
 375         int i, err;
 376
 377         BT_DBG("%s urb %p status %d count %d", hdev->name,
 378                                         urb, urb->status, urb->actual_length);
 379
 380         if (!test_bit(HCI_RUNNING, &hdev->flags))
 381                 return;
 382
 383         if (urb->status == 0) {
 384                 for (i = 0; i < urb->number_of_packets; i++) {
 385                         unsigned int offset = urb->iso_frame_desc[i].offset;
 386                         unsigned int length = urb->iso_frame_desc[i].actual_length;
 387
 388                         if (urb->iso_frame_desc[i].status)
 389                                 continue;
 390
 391                         hdev->stat.byte_rx += length;
 392
 393                         if (hci_recv_fragment(hdev, HCI_SCODATA_PKT,
 394                                                 urb->transfer_buffer + offset,
 395                                                                 length) < 0) {
 396                                 BT_ERR("%s corrupted SCO packet", hdev->name);
 397                                 hdev->stat.err_rx++;
 398                         }
 399                 }
 400         }
 401
 402         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
 403                 return;
 404
 405         usb_anchor_urb(urb, &data->isoc_anchor);
 406
 407         err = usb_submit_urb(urb, GFP_ATOMIC);
 408         if (err < 0) {
 409                 BT_ERR("%s urb %p failed to resubmit (%d)",
 410                                                 hdev->name, urb, -err);
 411                 usb_unanchor_urb(urb);
 412         }
 413 }
 414
 415 static void inline __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
 416 {
 417         int i, offset = 0;
 418
 419         BT_DBG("len %d mtu %d", len, mtu);
 420
 421         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
 422                                         i++, offset += mtu, len -= mtu) {
 423                 urb->iso_frame_desc[i].offset = offset;
 424                 urb->iso_frame_desc[i].length = mtu;
 425         }
 426
 427         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
 428                 urb->iso_frame_desc[i].offset = offset;
 429                 urb->iso_frame_desc[i].length = len;
 430                 i++;
 431         }
 432
 433         urb->number_of_packets = i;
 434 }
 435
 436 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
 437 {
 438         struct btusb_data *data = hdev->driver_data;
 439         struct urb *urb;
 440         unsigned char *buf;
 441         unsigned int pipe;
 442         int err, size;
 443
 444         BT_DBG("%s", hdev->name);
 445
 446         if (!data->isoc_rx_ep)
 447                 return -ENODEV;
 448
 449         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
 450         if (!urb)
 451                 return -ENOMEM;
 452
 453         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
 454                                                 BTUSB_MAX_ISOC_FRAMES;
 455
 456         buf = kmalloc(size, mem_flags);
 457         if (!buf) {
 458                 usb_free_urb(urb);
 459                 return -ENOMEM;
 460         }
 461
 462         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
 463
 464         urb->dev      = data->udev;
 465         urb->pipe     = pipe;
 466         urb->context  = hdev;
 467         urb->complete = btusb_isoc_complete;
 468         urb->interval = data->isoc_rx_ep->bInterval;
 469
 470         urb->transfer_flags  = URB_FREE_BUFFER | URB_ISO_ASAP;
 471         urb->transfer_buffer = buf;
 472         urb->transfer_buffer_length = size;
 473
 474         __fill_isoc_descriptor(urb, size,
 475                         le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
 476
 477         usb_anchor_urb(urb, &data->isoc_anchor);
 478
 479         err = usb_submit_urb(urb, mem_flags);
 480         if (err < 0) {
 481                 BT_ERR("%s urb %p submission failed (%d)",
 482                                                 hdev->name, urb, -err);
 483                 usb_unanchor_urb(urb);
 484         }
 485
 486         usb_free_urb(urb);
 487
 488         return err;
 489 }
 490
 491 static void btusb_tx_complete(struct urb *urb)
 492 {
 493         struct sk_buff *skb = urb->context;
 494         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 495         struct btusb_data *data = hdev->driver_data;
 496
 497         BT_DBG("%s urb %p status %d count %d", hdev->name,
 498                                         urb, urb->status, urb->actual_length);
 499
 500         if (!test_bit(HCI_RUNNING, &hdev->flags))
 501                 goto done;
 502
 503         if (!urb->status)
 504                 hdev->stat.byte_tx += urb->transfer_buffer_length;
 505         else
 506                 hdev->stat.err_tx++;
 507
 508 done:
 509         spin_lock(&data->txlock);
 510         data->tx_in_flight--;
 511         spin_unlock(&data->txlock);
 512
 513         kfree(urb->setup_packet);
 514
 515         kfree_skb(skb);
 516 }
 517
 518 static void btusb_isoc_tx_complete(struct urb *urb)
 519 {
 520         struct sk_buff *skb = urb->context;
 521         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 522
 523         BT_DBG("%s urb %p status %d count %d", hdev->name,
 524                                         urb, urb->status, urb->actual_length);
 525
 526         if (!test_bit(HCI_RUNNING, &hdev->flags))
 527                 goto done;
 528
 529         if (!urb->status)
 530                 hdev->stat.byte_tx += urb->transfer_buffer_length;
 531         else
 532                 hdev->stat.err_tx++;
 533
 534 done:
 535         kfree(urb->setup_packet);
 536
 537         kfree_skb(skb);
 538 }
 539
 540 static int btusb_open(struct hci_dev *hdev)
 541 {
 542         struct btusb_data *data = hdev->driver_data;
 543         int err;
 544
 545         BT_DBG("%s", hdev->name);
 546
 547         err = usb_autopm_get_interface(data->intf);
 548         if (err < 0)
 549                 return err;
 550
 551         data->intf->needs_remote_wakeup = 1;
 552
 553         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
 554                 goto done;
 555
 556         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
 557                 goto done;
 558
 559         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
 560         if (err < 0)
 561                 goto failed;
 562
 563         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
 564         if (err < 0) {
 565                 usb_kill_anchored_urbs(&data->intr_anchor);
 566                 goto failed;
 567         }
 568
 569         set_bit(BTUSB_BULK_RUNNING, &data->flags);
 570         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
 571
 572 done:
 573         usb_autopm_put_interface(data->intf);
 574         return 0;
 575
 576 failed:
 577         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
 578         clear_bit(HCI_RUNNING, &hdev->flags);
 579         usb_autopm_put_interface(data->intf);
 580         return err;
 581 }
 582
 583 static void btusb_stop_traffic(struct btusb_data *data)
 584 {
 585         usb_kill_anchored_urbs(&data->intr_anchor);
 586         usb_kill_anchored_urbs(&data->bulk_anchor);
 587         usb_kill_anchored_urbs(&data->isoc_anchor);
 588 }
 589
 590 static int btusb_close(struct hci_dev *hdev)
 591 {
 592         struct btusb_data *data = hdev->driver_data;
 593         int err;
 594
 595         BT_DBG("%s", hdev->name);
 596
 597         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 598                 return 0;
 599
 600         cancel_work_sync(&data->work);
 601         cancel_work_sync(&data->waker);
 602
 603         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 604         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
 605         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
 606
 607         btusb_stop_traffic(data);
 608         err = usb_autopm_get_interface(data->intf);
 609         if (err < 0)
 610                 goto failed;
 611
 612         data->intf->needs_remote_wakeup = 0;
 613         usb_autopm_put_interface(data->intf);
 614
 615 failed:
 616         usb_scuttle_anchored_urbs(&data->deferred);
 617         return 0;
 618 }
 619
 620 static int btusb_flush(struct hci_dev *hdev)
 621 {
 622         struct btusb_data *data = hdev->driver_data;
 623
 624         BT_DBG("%s", hdev->name);
 625
 626         usb_kill_anchored_urbs(&data->tx_anchor);
 627
 628         return 0;
 629 }
 630
 631 static int btusb_send_frame(struct sk_buff *skb)
 632 {
 633         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 634         struct btusb_data *data = hdev->driver_data;
 635         struct usb_ctrlrequest *dr;
 636         struct urb *urb;
 637         unsigned int pipe;
 638         int err;
 639
 640         BT_DBG("%s", hdev->name);
 641
 642         if (!test_bit(HCI_RUNNING, &hdev->flags))
 643                 return -EBUSY;
 644
 645         switch (bt_cb(skb)->pkt_type) {
 646         case HCI_COMMAND_PKT:
 647                 urb = usb_alloc_urb(0, GFP_ATOMIC);
 648                 if (!urb)
 649                         return -ENOMEM;
 650
 651                 dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
 652                 if (!dr) {
 653                         usb_free_urb(urb);
 654                         return -ENOMEM;
 655                 }
 656
 657                 dr->bRequestType = data->cmdreq_type;
 658                 dr->bRequest     = 0;
 659                 dr->wIndex       = 0;
 660                 dr->wValue       = 0;
 661                 dr->wLength      = __cpu_to_le16(skb->len);
 662
 663                 pipe = usb_sndctrlpipe(data->udev, 0x00);
 664
 665                 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
 666                                 skb->data, skb->len, btusb_tx_complete, skb);
 667
 668                 hdev->stat.cmd_tx++;
 669                 break;
 670
 671         case HCI_ACLDATA_PKT:
 672                 if (!data->bulk_tx_ep || hdev->conn_hash.acl_num < 1)
 673                         return -ENODEV;
 674
 675                 urb = usb_alloc_urb(0, GFP_ATOMIC);
 676                 if (!urb)
 677                         return -ENOMEM;
 678
 679                 pipe = usb_sndbulkpipe(data->udev,
 680                                         data->bulk_tx_ep->bEndpointAddress);
 681
 682                 usb_fill_bulk_urb(urb, data->udev, pipe,
 683                                 skb->data, skb->len, btusb_tx_complete, skb);
 684
 685                 hdev->stat.acl_tx++;
 686                 break;
 687
 688         case HCI_SCODATA_PKT:
 689                 if (!data->isoc_tx_ep || hdev->conn_hash.sco_num < 1)
 690                         return -ENODEV;
 691
 692                 urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_ATOMIC);
 693                 if (!urb)
 694                         return -ENOMEM;
 695
 696                 pipe = usb_sndisocpipe(data->udev,
 697                                         data->isoc_tx_ep->bEndpointAddress);
 698
 699                 urb->dev      = data->udev;
 700                 urb->pipe     = pipe;
 701                 urb->context  = skb;
 702                 urb->complete = btusb_isoc_tx_complete;
 703                 urb->interval = data->isoc_tx_ep->bInterval;
 704
 705                 urb->transfer_flags  = URB_ISO_ASAP;
 706                 urb->transfer_buffer = skb->data;
 707                 urb->transfer_buffer_length = skb->len;
 708
 709                 __fill_isoc_descriptor(urb, skb->len,
 710                                 le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
 711
 712                 hdev->stat.sco_tx++;
 713                 goto skip_waking;
 714
 715         default:
 716                 return -EILSEQ;
 717         }
 718
 719         err = inc_tx(data);
 720         if (err) {
 721                 usb_anchor_urb(urb, &data->deferred);
 722                 schedule_work(&data->waker);
 723                 err = 0;
 724                 goto done;
 725         }
 726
 727 skip_waking:
 728         usb_anchor_urb(urb, &data->tx_anchor);
 729
 730         err = usb_submit_urb(urb, GFP_ATOMIC);
 731         if (err < 0) {
 732                 BT_ERR("%s urb %p submission failed", hdev->name, urb);
 733                 kfree(urb->setup_packet);
 734                 usb_unanchor_urb(urb);
 735         } else {
 736                 usb_mark_last_busy(data->udev);
 737         }
 738
 739         usb_free_urb(urb);
 740
 741 done:
 742         return err;
 743 }
 744
 745 static void btusb_destruct(struct hci_dev *hdev)
 746 {
 747         struct btusb_data *data = hdev->driver_data;
 748
 749         BT_DBG("%s", hdev->name);
 750
 751         kfree(data);
 752 }
 753
 754 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
 755 {
 756         struct btusb_data *data = hdev->driver_data;
 757
 758         BT_DBG("%s evt %d", hdev->name, evt);
 759
 760         if (hdev->conn_hash.sco_num != data->sco_num) {
 761                 data->sco_num = hdev->conn_hash.sco_num;
 762                 schedule_work(&data->work);
 763         }
 764 }
 765
 766 static int inline __set_isoc_interface(struct hci_dev *hdev, int altsetting)
 767 {
 768         struct btusb_data *data = hdev->driver_data;
 769         struct usb_interface *intf = data->isoc;
 770         struct usb_endpoint_descriptor *ep_desc;
 771         int i, err;
 772
 773         if (!data->isoc)
 774                 return -ENODEV;
 775
 776         err = usb_set_interface(data->udev, 1, altsetting);
 777         if (err < 0) {
 778                 BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
 779                 return err;
 780         }
 781
 782         data->isoc_altsetting = altsetting;
 783
 784         data->isoc_tx_ep = NULL;
 785         data->isoc_rx_ep = NULL;
 786
 787         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
 788                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
 789
 790                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
 791                         data->isoc_tx_ep = ep_desc;
 792                         continue;
 793                 }
 794
 795                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
 796                         data->isoc_rx_ep = ep_desc;
 797                         continue;
 798                 }
 799         }
 800
 801         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
 802                 BT_ERR("%s invalid SCO descriptors", hdev->name);
 803                 return -ENODEV;
 804         }
 805
 806         return 0;
 807 }
 808
 809 static void btusb_work(struct work_struct *work)
 810 {
 811         struct btusb_data *data = container_of(work, struct btusb_data, work);
 812         struct hci_dev *hdev = data->hdev;
 813         int err;
 814
 815         if (hdev->conn_hash.sco_num > 0) {
 816                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
 817                         err = usb_autopm_get_interface(data->isoc);
 818                         if (err < 0) {
 819                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 820                                 usb_kill_anchored_urbs(&data->isoc_anchor);
 821                                 return;
 822                         }
 823
 824                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
 825                 }
 826                 if (data->isoc_altsetting != 2) {
 827                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 828                         usb_kill_anchored_urbs(&data->isoc_anchor);
 829
 830                         if (__set_isoc_interface(hdev, 2) < 0)
 831                                 return;
 832                 }
 833
 834                 if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
 835                         if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
 836                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 837                         else
 838                                 btusb_submit_isoc_urb(hdev, GFP_KERNEL);
 839                 }
 840         } else {
 841                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 842                 usb_kill_anchored_urbs(&data->isoc_anchor);
 843
 844                 __set_isoc_interface(hdev, 0);
 845                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
 846                         usb_autopm_put_interface(data->isoc);
 847         }
 848 }
 849
 850 static void btusb_waker(struct work_struct *work)
 851 {
 852         struct btusb_data *data = container_of(work, struct btusb_data, waker);
 853         int err;
 854
 855         err = usb_autopm_get_interface(data->intf);
 856         if (err < 0)
 857                 return;
 858
 859         usb_autopm_put_interface(data->intf);
 860 }
 861
 862 static int btusb_probe(struct usb_interface *intf,
 863                                 const struct usb_device_id *id)
 864 {
 865         struct usb_endpoint_descriptor *ep_desc;
 866         struct btusb_data *data;
 867         struct hci_dev *hdev;
 868         int i, err;
 869
 870         BT_DBG("intf %p id %p", intf, id);
 871
 872         /* interface numbers are hardcoded in the spec */
 873         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 874                 return -ENODEV;
 875
 876         if (!id->driver_info) {
 877                 const struct usb_device_id *match;
 878                 match = usb_match_id(intf, blacklist_table);
 879                 if (match)
 880                         id = match;
 881         }
 882
 883         if (id->driver_info == BTUSB_IGNORE)
 884                 return -ENODEV;
 885
 886         if (ignore_dga && id->driver_info & BTUSB_DIGIANSWER)
 887                 return -ENODEV;
 888
 889         if (ignore_csr && id->driver_info & BTUSB_CSR)
 890                 return -ENODEV;
 891
 892         if (ignore_sniffer && id->driver_info & BTUSB_SNIFFER)
 893                 return -ENODEV;
 894
 895         data = kzalloc(sizeof(*data), GFP_KERNEL);
 896         if (!data)
 897                 return -ENOMEM;
 898
 899         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
 900                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
 901
 902                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
 903                         data->intr_ep = ep_desc;
 904                         continue;
 905                 }
 906
 907                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
 908                         data->bulk_tx_ep = ep_desc;
 909                         continue;
 910                 }
 911
 912                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
 913                         data->bulk_rx_ep = ep_desc;
 914                         continue;
 915                 }
 916         }
 917
 918         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep) {
 919                 kfree(data);
 920                 return -ENODEV;
 921         }
 922
 923         data->cmdreq_type = USB_TYPE_CLASS;
 924
 925         data->udev = interface_to_usbdev(intf);
 926         data->intf = intf;
 927
 928         spin_lock_init(&data->lock);
 929
 930         INIT_WORK(&data->work, btusb_work);
 931         INIT_WORK(&data->waker, btusb_waker);
 932         spin_lock_init(&data->txlock);
 933
 934         init_usb_anchor(&data->tx_anchor);
 935         init_usb_anchor(&data->intr_anchor);
 936         init_usb_anchor(&data->bulk_anchor);
 937         init_usb_anchor(&data->isoc_anchor);
 938         init_usb_anchor(&data->deferred);
 939
 940         hdev = hci_alloc_dev();
 941         if (!hdev) {
 942                 kfree(data);
 943                 return -ENOMEM;
 944         }
 945
 946         hdev->bus = HCI_USB;
 947         hdev->driver_data = data;
 948
 949         data->hdev = hdev;
 950
 951         SET_HCIDEV_DEV(hdev, &intf->dev);
 952
 953         hdev->open     = btusb_open;
 954         hdev->close    = btusb_close;
 955         hdev->flush    = btusb_flush;
 956         hdev->send     = btusb_send_frame;
 957         hdev->destruct = btusb_destruct;
 958         hdev->notify   = btusb_notify;
 959
 960         hdev->owner = THIS_MODULE;
 961
 962         /* Interface numbers are hardcoded in the specification */
 963         data->isoc = usb_ifnum_to_if(data->udev, 1);
 964
 965         if (!reset)
 966                 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
 967
 968         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
 969                 if (!disable_scofix)
 970                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
 971         }
 972
 973         if (id->driver_info & BTUSB_BROKEN_ISOC)
 974                 data->isoc = NULL;
 975
 976         if (id->driver_info & BTUSB_DIGIANSWER) {
 977                 data->cmdreq_type = USB_TYPE_VENDOR;
 978                 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
 979         }
 980
 981         if (id->driver_info & BTUSB_CSR) {
 982                 struct usb_device *udev = data->udev;
 983
 984                 /* Old firmware would otherwise execute USB reset */
 985                 if (le16_to_cpu(udev->descriptor.bcdDevice) < 0x117)
 986                         set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
 987         }
 988
 989         if (id->driver_info & BTUSB_SNIFFER) {
 990                 struct usb_device *udev = data->udev;
 991
 992                 /* New sniffer firmware has crippled HCI interface */
 993                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
 994                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
 995
 996                 data->isoc = NULL;
 997         }
 998
 999         if (id->driver_info & BTUSB_BCM92035) {
1000                 unsigned char cmd[] = { 0x3b, 0xfc, 0x01, 0x00 };
1001                 struct sk_buff *skb;
1002
1003                 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
1004                 if (skb) {
1005                         memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));
1006                         skb_queue_tail(&hdev->driver_init, skb);
1007                 }
1008         }
1009
1010         if (data->isoc) {
1011                 err = usb_driver_claim_interface(&btusb_driver,
1012                                                         data->isoc, data);
1013                 if (err < 0) {
1014                         hci_free_dev(hdev);
1015                         kfree(data);
1016                         return err;
1017                 }
1018         }
1019
1020         err = hci_register_dev(hdev);
1021         if (err < 0) {
1022                 hci_free_dev(hdev);
1023                 kfree(data);
1024                 return err;
1025         }
1026
1027         usb_set_intfdata(intf, data);
1028
1029         return 0;
1030 }
1031
1032 static void btusb_disconnect(struct usb_interface *intf)
1033 {
1034         struct btusb_data *data = usb_get_intfdata(intf);
1035         struct hci_dev *hdev;
1036
1037         BT_DBG("intf %p", intf);
1038
1039         if (!data)
1040                 return;
1041
1042         hdev = data->hdev;
1043
1044         __hci_dev_hold(hdev);
1045
1046         usb_set_intfdata(data->intf, NULL);
1047
1048         if (data->isoc)
1049                 usb_set_intfdata(data->isoc, NULL);
1050
1051         hci_unregister_dev(hdev);
1052
1053         if (intf == data->isoc)
1054                 usb_driver_release_interface(&btusb_driver, data->intf);
1055         else if (data->isoc)
1056                 usb_driver_release_interface(&btusb_driver, data->isoc);
1057
1058         __hci_dev_put(hdev);
1059
1060         hci_free_dev(hdev);
1061 }
1062
1063 #ifdef CONFIG_PM
1064 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
1065 {
1066         struct btusb_data *data = usb_get_intfdata(intf);
1067
1068         BT_DBG("intf %p", intf);
1069
1070         if (data->suspend_count++)
1071                 return 0;
1072
1073         spin_lock_irq(&data->txlock);
1074         if (!((message.event & PM_EVENT_AUTO) && data->tx_in_flight)) {
1075                 set_bit(BTUSB_SUSPENDING, &data->flags);
1076                 spin_unlock_irq(&data->txlock);
1077         } else {
1078                 spin_unlock_irq(&data->txlock);
1079                 data->suspend_count--;
1080                 return -EBUSY;
1081         }
1082
1083         cancel_work_sync(&data->work);
1084
1085         btusb_stop_traffic(data);
1086         usb_kill_anchored_urbs(&data->tx_anchor);
1087
1088         return 0;
1089 }
1090
1091 static void play_deferred(struct btusb_data *data)
1092 {
1093         struct urb *urb;
1094         int err;
1095
1096         while ((urb = usb_get_from_anchor(&data->deferred))) {
1097                 err = usb_submit_urb(urb, GFP_ATOMIC);
1098                 if (err < 0)
1099                         break;
1100
1101                 data->tx_in_flight++;
1102         }
1103         usb_scuttle_anchored_urbs(&data->deferred);
1104 }
1105
1106 static int btusb_resume(struct usb_interface *intf)
1107 {
1108         struct btusb_data *data = usb_get_intfdata(intf);
1109         struct hci_dev *hdev = data->hdev;
1110         int err = 0;
1111
1112         BT_DBG("intf %p", intf);
1113
1114         if (--data->suspend_count)
1115                 return 0;
1116
1117         if (!test_bit(HCI_RUNNING, &hdev->flags))
1118                 goto done;
1119
1120         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
1121                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
1122                 if (err < 0) {
1123                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1124                         goto failed;
1125                 }
1126         }
1127
1128         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
1129                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
1130                 if (err < 0) {
1131                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1132                         goto failed;
1133                 }
1134
1135                 btusb_submit_bulk_urb(hdev, GFP_NOIO);
1136         }
1137
1138         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1139                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
1140                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1141                 else
1142                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
1143         }
1144
1145         spin_lock_irq(&data->txlock);
1146         play_deferred(data);
1147         clear_bit(BTUSB_SUSPENDING, &data->flags);
1148         spin_unlock_irq(&data->txlock);
1149         schedule_work(&data->work);
1150
1151         return 0;
1152
1153 failed:
1154         usb_scuttle_anchored_urbs(&data->deferred);
1155 done:
1156         spin_lock_irq(&data->txlock);
1157         clear_bit(BTUSB_SUSPENDING, &data->flags);
1158         spin_unlock_irq(&data->txlock);
1159
1160         return err;
1161 }
1162 #endif
1163
1164 static struct usb_driver btusb_driver = {
1165         .name           = "btusb",
1166         .probe          = btusb_probe,
1167         .disconnect     = btusb_disconnect,
1168 #ifdef CONFIG_PM
1169         .suspend        = btusb_suspend,
1170         .resume         = btusb_resume,
1171 #endif
1172         .id_table       = btusb_table,
1173         .supports_autosuspend = 1,
1174 };
1175
1176 static int __init btusb_init(void)
1177 {
1178         BT_INFO("Generic Bluetooth USB driver ver %s", VERSION);
1179
1180         return usb_register(&btusb_driver);
1181 }
1182
1183 static void __exit btusb_exit(void)
1184 {
1185         usb_deregister(&btusb_driver);
1186 }
1187
1188 module_init(btusb_init);
1189 module_exit(btusb_exit);
1190
1191 module_param(ignore_dga, bool, 0644);
1192 MODULE_PARM_DESC(ignore_dga, "Ignore devices with id 08fd:0001");
1193
1194 module_param(ignore_csr, bool, 0644);
1195 MODULE_PARM_DESC(ignore_csr, "Ignore devices with id 0a12:0001");
1196
1197 module_param(ignore_sniffer, bool, 0644);
1198 MODULE_PARM_DESC(ignore_sniffer, "Ignore devices with id 0a12:0002");
1199
1200 module_param(disable_scofix, bool, 0644);
1201 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
1202
1203 module_param(force_scofix, bool, 0644);
1204 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
1205
1206 module_param(reset, bool, 0644);
1207 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
1208
1209 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
1210 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
1211 MODULE_VERSION(VERSION);
1212 MODULE_LICENSE("GPL");