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