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