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 #define BTUSB_ATH3012           0x80
  58 #define BTUSB_INTEL_BOOT        0x200
  59
  60 static struct usb_device_id btusb_table[] = {
  61         /* Generic Bluetooth USB device */
  62         { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
  63
  64         /* Apple-specific (Broadcom) devices */
  65         { USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01) },
  66
  67         /* MediaTek MT76x0E */
  68         { USB_DEVICE(0x0e8d, 0x763f) },
  69
  70         /* Broadcom SoftSailing reporting vendor specific */
  71         { USB_DEVICE(0x0a5c, 0x21e1) },
  72
  73         /* Apple MacBookPro 7,1 */
  74         { USB_DEVICE(0x05ac, 0x8213) },
  75
  76         /* Apple iMac11,1 */
  77         { USB_DEVICE(0x05ac, 0x8215) },
  78
  79         /* Apple MacBookPro6,2 */
  80         { USB_DEVICE(0x05ac, 0x8218) },
  81
  82         /* Apple MacBookAir3,1, MacBookAir3,2 */
  83         { USB_DEVICE(0x05ac, 0x821b) },
  84
  85         /* Apple MacBookAir4,1 */
  86         { USB_DEVICE(0x05ac, 0x821f) },
  87
  88         /* Apple MacBookPro8,2 */
  89         { USB_DEVICE(0x05ac, 0x821a) },
  90
  91         /* Apple MacMini5,1 */
  92         { USB_DEVICE(0x05ac, 0x8281) },
  93
  94         /* AVM BlueFRITZ! USB v2.0 */
  95         { USB_DEVICE(0x057c, 0x3800) },
  96
  97         /* Bluetooth Ultraport Module from IBM */
  98         { USB_DEVICE(0x04bf, 0x030a) },
  99
 100         /* ALPS Modules with non-standard id */
 101         { USB_DEVICE(0x044e, 0x3001) },
 102         { USB_DEVICE(0x044e, 0x3002) },
 103
 104         /* Ericsson with non-standard id */
 105         { USB_DEVICE(0x0bdb, 0x1002) },
 106
 107         /* Canyon CN-BTU1 with HID interfaces */
 108         { USB_DEVICE(0x0c10, 0x0000) },
 109
 110         /* Broadcom BCM20702A0 */
 111         { USB_DEVICE(0x0489, 0xe042) },
 112         { USB_DEVICE(0x04ca, 0x2003) },
 113         { USB_DEVICE(0x0b05, 0x17b5) },
 114         { USB_DEVICE(0x0b05, 0x17cb) },
 115         { USB_DEVICE(0x413c, 0x8197) },
 116
 117         /* Foxconn - Hon Hai */
 118         { USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01) },
 119
 120         /* Broadcom devices with vendor specific id */
 121         { USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01) },
 122
 123         /* Belkin F8065bf - Broadcom based */
 124         { USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01) },
 125
 126         /* IMC Networks - Broadcom based */
 127         { USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01) },
 128
 129         /* Intel Bluetooth USB Bootloader (RAM module) */
 130         { USB_DEVICE(0x8087, 0x0a5a),
 131           .driver_info = BTUSB_INTEL_BOOT | BTUSB_BROKEN_ISOC },
 132
 133         { }     /* Terminating entry */
 134 };
 135
 136 MODULE_DEVICE_TABLE(usb, btusb_table);
 137
 138 static struct usb_device_id blacklist_table[] = {
 139         /* CSR BlueCore devices */
 140         { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
 141
 142         /* Broadcom BCM2033 without firmware */
 143         { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
 144
 145         /* Atheros 3011 with sflash firmware */
 146         { USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
 147         { USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
 148         { USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
 149         { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
 150         { USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
 151         { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
 152
 153         /* Atheros AR9285 Malbec with sflash firmware */
 154         { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
 155
 156         /* Atheros 3012 with sflash firmware */
 157         { USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
 158         { USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
 159         { USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
 160         { USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
 161         { USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
 162         { USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
 163         { USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
 164         { USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
 165         { USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
 166         { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
 167         { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
 168         { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
 169         { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
 170         { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
 171         { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
 172         { USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
 173         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
 174         { USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
 175         { USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
 176         { USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },
 177         { USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },
 178         { USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
 179         { USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
 180         { USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
 181         { USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
 182         { USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
 183         { USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
 184         { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
 185         { USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
 186         { USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
 187         { USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
 188
 189         /* Atheros AR5BBU12 with sflash firmware */
 190         { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
 191
 192         /* Atheros AR5BBU12 with sflash firmware */
 193         { USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
 194         { USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
 195
 196         /* Broadcom BCM2035 */
 197         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
 198         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
 199         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
 200
 201         /* Broadcom BCM2045 */
 202         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
 203         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
 204
 205         /* IBM/Lenovo ThinkPad with Broadcom chip */
 206         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
 207         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
 208
 209         /* HP laptop with Broadcom chip */
 210         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
 211
 212         /* Dell laptop with Broadcom chip */
 213         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
 214
 215         /* Dell Wireless 370 and 410 devices */
 216         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
 217         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
 218
 219         /* Belkin F8T012 and F8T013 devices */
 220         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
 221         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
 222
 223         /* Asus WL-BTD202 device */
 224         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
 225
 226         /* Kensington Bluetooth USB adapter */
 227         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
 228
 229         /* RTX Telecom based adapters with buggy SCO support */
 230         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
 231         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
 232
 233         /* CONWISE Technology based adapters with buggy SCO support */
 234         { USB_DEVICE(0x0e5e, 0x6622), .driver_info = BTUSB_BROKEN_ISOC },
 235
 236         /* Digianswer devices */
 237         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
 238         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
 239
 240         /* CSR BlueCore Bluetooth Sniffer */
 241         { USB_DEVICE(0x0a12, 0x0002), .driver_info = BTUSB_SNIFFER },
 242
 243         /* Frontline ComProbe Bluetooth Sniffer */
 244         { USB_DEVICE(0x16d3, 0x0002), .driver_info = BTUSB_SNIFFER },
 245
 246         { }     /* Terminating entry */
 247 };
 248
 249 #define BTUSB_MAX_ISOC_FRAMES   10
 250
 251 #define BTUSB_INTR_RUNNING      0
 252 #define BTUSB_BULK_RUNNING      1
 253 #define BTUSB_ISOC_RUNNING      2
 254 #define BTUSB_SUSPENDING        3
 255 #define BTUSB_DID_ISO_RESUME    4
 256
 257 struct btusb_data {
 258         struct hci_dev       *hdev;
 259         struct usb_device    *udev;
 260         struct usb_interface *intf;
 261         struct usb_interface *isoc;
 262
 263         spinlock_t lock;
 264
 265         unsigned long flags;
 266
 267         struct work_struct work;
 268         struct work_struct waker;
 269
 270         struct usb_anchor tx_anchor;
 271         struct usb_anchor intr_anchor;
 272         struct usb_anchor bulk_anchor;
 273         struct usb_anchor isoc_anchor;
 274         struct usb_anchor deferred;
 275         int tx_in_flight;
 276         spinlock_t txlock;
 277
 278         struct usb_endpoint_descriptor *intr_ep;
 279         struct usb_endpoint_descriptor *bulk_tx_ep;
 280         struct usb_endpoint_descriptor *bulk_rx_ep;
 281         struct usb_endpoint_descriptor *isoc_tx_ep;
 282         struct usb_endpoint_descriptor *isoc_rx_ep;
 283
 284         __u8 cmdreq_type;
 285
 286         unsigned int sco_num;
 287         int isoc_altsetting;
 288         int suspend_count;
 289 };
 290
 291 static int inc_tx(struct btusb_data *data)
 292 {
 293         unsigned long flags;
 294         int rv;
 295
 296         spin_lock_irqsave(&data->txlock, flags);
 297         rv = test_bit(BTUSB_SUSPENDING, &data->flags);
 298         if (!rv)
 299                 data->tx_in_flight++;
 300         spin_unlock_irqrestore(&data->txlock, flags);
 301
 302         return rv;
 303 }
 304
 305 static void btusb_intr_complete(struct urb *urb)
 306 {
 307         struct hci_dev *hdev = urb->context;
 308         struct btusb_data *data = hdev->driver_data;
 309         int err;
 310
 311         BT_DBG("%s urb %p status %d count %d", hdev->name,
 312                                         urb, urb->status, urb->actual_length);
 313
 314         if (!test_bit(HCI_RUNNING, &hdev->flags))
 315                 return;
 316
 317         if (urb->status == 0) {
 318                 hdev->stat.byte_rx += urb->actual_length;
 319
 320                 if (hci_recv_fragment(hdev, HCI_EVENT_PKT,
 321                                                 urb->transfer_buffer,
 322                                                 urb->actual_length) < 0) {
 323                         BT_ERR("%s corrupted event packet", hdev->name);
 324                         hdev->stat.err_rx++;
 325                 }
 326         } else if (urb->status == -ENOENT) {
 327                 /* Avoid suspend failed when usb_kill_urb */
 328                 return;
 329         }
 330
 331         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
 332                 return;
 333
 334         usb_mark_last_busy(data->udev);
 335         usb_anchor_urb(urb, &data->intr_anchor);
 336
 337         err = usb_submit_urb(urb, GFP_ATOMIC);
 338         if (err < 0) {
 339                 /* -EPERM: urb is being killed;
 340                  * -ENODEV: device got disconnected */
 341                 if (err != -EPERM && err != -ENODEV)
 342                         BT_ERR("%s urb %p failed to resubmit (%d)",
 343                                                 hdev->name, urb, -err);
 344                 usb_unanchor_urb(urb);
 345         }
 346 }
 347
 348 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
 349 {
 350         struct btusb_data *data = hdev->driver_data;
 351         struct urb *urb;
 352         unsigned char *buf;
 353         unsigned int pipe;
 354         int err, size;
 355
 356         BT_DBG("%s", hdev->name);
 357
 358         if (!data->intr_ep)
 359                 return -ENODEV;
 360
 361         urb = usb_alloc_urb(0, mem_flags);
 362         if (!urb)
 363                 return -ENOMEM;
 364
 365         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
 366
 367         buf = kmalloc(size, mem_flags);
 368         if (!buf) {
 369                 usb_free_urb(urb);
 370                 return -ENOMEM;
 371         }
 372
 373         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
 374
 375         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
 376                                                 btusb_intr_complete, hdev,
 377                                                 data->intr_ep->bInterval);
 378
 379         urb->transfer_flags |= URB_FREE_BUFFER;
 380
 381         usb_anchor_urb(urb, &data->intr_anchor);
 382
 383         err = usb_submit_urb(urb, mem_flags);
 384         if (err < 0) {
 385                 BT_ERR("%s urb %p submission failed (%d)",
 386                                                 hdev->name, urb, -err);
 387                 usb_unanchor_urb(urb);
 388         }
 389
 390         usb_free_urb(urb);
 391
 392         return err;
 393 }
 394
 395 static void btusb_bulk_complete(struct urb *urb)
 396 {
 397         struct hci_dev *hdev = urb->context;
 398         struct btusb_data *data = hdev->driver_data;
 399         int err;
 400
 401         BT_DBG("%s urb %p status %d count %d", hdev->name,
 402                                         urb, urb->status, urb->actual_length);
 403
 404         if (!test_bit(HCI_RUNNING, &hdev->flags))
 405                 return;
 406
 407         if (urb->status == 0) {
 408                 hdev->stat.byte_rx += urb->actual_length;
 409
 410                 if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT,
 411                                                 urb->transfer_buffer,
 412                                                 urb->actual_length) < 0) {
 413                         BT_ERR("%s corrupted ACL packet", hdev->name);
 414                         hdev->stat.err_rx++;
 415                 }
 416         } else if (urb->status == -ENOENT) {
 417                 /* Avoid suspend failed when usb_kill_urb */
 418                 return;
 419         }
 420
 421         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
 422                 return;
 423
 424         usb_anchor_urb(urb, &data->bulk_anchor);
 425         usb_mark_last_busy(data->udev);
 426
 427         err = usb_submit_urb(urb, GFP_ATOMIC);
 428         if (err < 0) {
 429                 /* -EPERM: urb is being killed;
 430                  * -ENODEV: device got disconnected */
 431                 if (err != -EPERM && err != -ENODEV)
 432                         BT_ERR("%s urb %p failed to resubmit (%d)",
 433                                                 hdev->name, urb, -err);
 434                 usb_unanchor_urb(urb);
 435         }
 436 }
 437
 438 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
 439 {
 440         struct btusb_data *data = hdev->driver_data;
 441         struct urb *urb;
 442         unsigned char *buf;
 443         unsigned int pipe;
 444         int err, size = HCI_MAX_FRAME_SIZE;
 445
 446         BT_DBG("%s", hdev->name);
 447
 448         if (!data->bulk_rx_ep)
 449                 return -ENODEV;
 450
 451         urb = usb_alloc_urb(0, mem_flags);
 452         if (!urb)
 453                 return -ENOMEM;
 454
 455         buf = kmalloc(size, mem_flags);
 456         if (!buf) {
 457                 usb_free_urb(urb);
 458                 return -ENOMEM;
 459         }
 460
 461         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
 462
 463         usb_fill_bulk_urb(urb, data->udev, pipe,
 464                                         buf, size, btusb_bulk_complete, hdev);
 465
 466         urb->transfer_flags |= URB_FREE_BUFFER;
 467
 468         usb_mark_last_busy(data->udev);
 469         usb_anchor_urb(urb, &data->bulk_anchor);
 470
 471         err = usb_submit_urb(urb, mem_flags);
 472         if (err < 0) {
 473                 BT_ERR("%s urb %p submission failed (%d)",
 474                                                 hdev->name, urb, -err);
 475                 usb_unanchor_urb(urb);
 476         }
 477
 478         usb_free_urb(urb);
 479
 480         return err;
 481 }
 482
 483 static void btusb_isoc_complete(struct urb *urb)
 484 {
 485         struct hci_dev *hdev = urb->context;
 486         struct btusb_data *data = hdev->driver_data;
 487         int i, err;
 488
 489         BT_DBG("%s urb %p status %d count %d", hdev->name,
 490                                         urb, urb->status, urb->actual_length);
 491
 492         if (!test_bit(HCI_RUNNING, &hdev->flags))
 493                 return;
 494
 495         if (urb->status == 0) {
 496                 for (i = 0; i < urb->number_of_packets; i++) {
 497                         unsigned int offset = urb->iso_frame_desc[i].offset;
 498                         unsigned int length = urb->iso_frame_desc[i].actual_length;
 499
 500                         if (urb->iso_frame_desc[i].status)
 501                                 continue;
 502
 503                         hdev->stat.byte_rx += length;
 504
 505                         if (hci_recv_fragment(hdev, HCI_SCODATA_PKT,
 506                                                 urb->transfer_buffer + offset,
 507                                                                 length) < 0) {
 508                                 BT_ERR("%s corrupted SCO packet", hdev->name);
 509                                 hdev->stat.err_rx++;
 510                         }
 511                 }
 512         } else if (urb->status == -ENOENT) {
 513                 /* Avoid suspend failed when usb_kill_urb */
 514                 return;
 515         }
 516
 517         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
 518                 return;
 519
 520         usb_anchor_urb(urb, &data->isoc_anchor);
 521
 522         err = usb_submit_urb(urb, GFP_ATOMIC);
 523         if (err < 0) {
 524                 /* -EPERM: urb is being killed;
 525                  * -ENODEV: device got disconnected */
 526                 if (err != -EPERM && err != -ENODEV)
 527                         BT_ERR("%s urb %p failed to resubmit (%d)",
 528                                                 hdev->name, urb, -err);
 529                 usb_unanchor_urb(urb);
 530         }
 531 }
 532
 533 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
 534 {
 535         int i, offset = 0;
 536
 537         BT_DBG("len %d mtu %d", len, mtu);
 538
 539         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
 540                                         i++, offset += mtu, len -= mtu) {
 541                 urb->iso_frame_desc[i].offset = offset;
 542                 urb->iso_frame_desc[i].length = mtu;
 543         }
 544
 545         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
 546                 urb->iso_frame_desc[i].offset = offset;
 547                 urb->iso_frame_desc[i].length = len;
 548                 i++;
 549         }
 550
 551         urb->number_of_packets = i;
 552 }
 553
 554 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
 555 {
 556         struct btusb_data *data = hdev->driver_data;
 557         struct urb *urb;
 558         unsigned char *buf;
 559         unsigned int pipe;
 560         int err, size;
 561
 562         BT_DBG("%s", hdev->name);
 563
 564         if (!data->isoc_rx_ep)
 565                 return -ENODEV;
 566
 567         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
 568         if (!urb)
 569                 return -ENOMEM;
 570
 571         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
 572                                                 BTUSB_MAX_ISOC_FRAMES;
 573
 574         buf = kmalloc(size, mem_flags);
 575         if (!buf) {
 576                 usb_free_urb(urb);
 577                 return -ENOMEM;
 578         }
 579
 580         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
 581
 582         usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
 583                                 hdev, data->isoc_rx_ep->bInterval);
 584
 585         urb->transfer_flags  = URB_FREE_BUFFER | URB_ISO_ASAP;
 586
 587         __fill_isoc_descriptor(urb, size,
 588                         le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
 589
 590         usb_anchor_urb(urb, &data->isoc_anchor);
 591
 592         err = usb_submit_urb(urb, mem_flags);
 593         if (err < 0) {
 594                 BT_ERR("%s urb %p submission failed (%d)",
 595                                                 hdev->name, urb, -err);
 596                 usb_unanchor_urb(urb);
 597         }
 598
 599         usb_free_urb(urb);
 600
 601         return err;
 602 }
 603
 604 static void btusb_tx_complete(struct urb *urb)
 605 {
 606         struct sk_buff *skb = urb->context;
 607         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 608         struct btusb_data *data = hdev->driver_data;
 609
 610         BT_DBG("%s urb %p status %d count %d", hdev->name,
 611                                         urb, urb->status, urb->actual_length);
 612
 613         if (!test_bit(HCI_RUNNING, &hdev->flags))
 614                 goto done;
 615
 616         if (!urb->status)
 617                 hdev->stat.byte_tx += urb->transfer_buffer_length;
 618         else
 619                 hdev->stat.err_tx++;
 620
 621 done:
 622         spin_lock(&data->txlock);
 623         data->tx_in_flight--;
 624         spin_unlock(&data->txlock);
 625
 626         kfree(urb->setup_packet);
 627
 628         kfree_skb(skb);
 629 }
 630
 631 static void btusb_isoc_tx_complete(struct urb *urb)
 632 {
 633         struct sk_buff *skb = urb->context;
 634         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 635
 636         BT_DBG("%s urb %p status %d count %d", hdev->name,
 637                                         urb, urb->status, urb->actual_length);
 638
 639         if (!test_bit(HCI_RUNNING, &hdev->flags))
 640                 goto done;
 641
 642         if (!urb->status)
 643                 hdev->stat.byte_tx += urb->transfer_buffer_length;
 644         else
 645                 hdev->stat.err_tx++;
 646
 647 done:
 648         kfree(urb->setup_packet);
 649
 650         kfree_skb(skb);
 651 }
 652
 653 static int btusb_open(struct hci_dev *hdev)
 654 {
 655         struct btusb_data *data = hdev->driver_data;
 656         int err;
 657
 658         BT_DBG("%s", hdev->name);
 659
 660         err = usb_autopm_get_interface(data->intf);
 661         if (err < 0)
 662                 return err;
 663
 664         data->intf->needs_remote_wakeup = 1;
 665
 666         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
 667                 goto done;
 668
 669         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
 670                 goto done;
 671
 672         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
 673         if (err < 0)
 674                 goto failed;
 675
 676         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
 677         if (err < 0) {
 678                 usb_kill_anchored_urbs(&data->intr_anchor);
 679                 goto failed;
 680         }
 681
 682         set_bit(BTUSB_BULK_RUNNING, &data->flags);
 683         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
 684
 685 done:
 686         usb_autopm_put_interface(data->intf);
 687         return 0;
 688
 689 failed:
 690         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
 691         clear_bit(HCI_RUNNING, &hdev->flags);
 692         usb_autopm_put_interface(data->intf);
 693         return err;
 694 }
 695
 696 static void btusb_stop_traffic(struct btusb_data *data)
 697 {
 698         usb_kill_anchored_urbs(&data->intr_anchor);
 699         usb_kill_anchored_urbs(&data->bulk_anchor);
 700         usb_kill_anchored_urbs(&data->isoc_anchor);
 701 }
 702
 703 static int btusb_close(struct hci_dev *hdev)
 704 {
 705         struct btusb_data *data = hdev->driver_data;
 706         int err;
 707
 708         BT_DBG("%s", hdev->name);
 709
 710         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 711                 return 0;
 712
 713         cancel_work_sync(&data->work);
 714         cancel_work_sync(&data->waker);
 715
 716         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 717         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
 718         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
 719
 720         btusb_stop_traffic(data);
 721         err = usb_autopm_get_interface(data->intf);
 722         if (err < 0)
 723                 goto failed;
 724
 725         data->intf->needs_remote_wakeup = 0;
 726         usb_autopm_put_interface(data->intf);
 727
 728 failed:
 729         usb_scuttle_anchored_urbs(&data->deferred);
 730         return 0;
 731 }
 732
 733 static int btusb_flush(struct hci_dev *hdev)
 734 {
 735         struct btusb_data *data = hdev->driver_data;
 736
 737         BT_DBG("%s", hdev->name);
 738
 739         usb_kill_anchored_urbs(&data->tx_anchor);
 740
 741         return 0;
 742 }
 743
 744 static int btusb_send_frame(struct sk_buff *skb)
 745 {
 746         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 747         struct btusb_data *data = hdev->driver_data;
 748         struct usb_ctrlrequest *dr;
 749         struct urb *urb;
 750         unsigned int pipe;
 751         int err;
 752
 753         BT_DBG("%s", hdev->name);
 754
 755         if (!test_bit(HCI_RUNNING, &hdev->flags))
 756                 return -EBUSY;
 757
 758         switch (bt_cb(skb)->pkt_type) {
 759         case HCI_COMMAND_PKT:
 760                 urb = usb_alloc_urb(0, GFP_ATOMIC);
 761                 if (!urb)
 762                         return -ENOMEM;
 763
 764                 dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
 765                 if (!dr) {
 766                         usb_free_urb(urb);
 767                         return -ENOMEM;
 768                 }
 769
 770                 dr->bRequestType = data->cmdreq_type;
 771                 dr->bRequest     = 0;
 772                 dr->wIndex       = 0;
 773                 dr->wValue       = 0;
 774                 dr->wLength      = __cpu_to_le16(skb->len);
 775
 776                 pipe = usb_sndctrlpipe(data->udev, 0x00);
 777
 778                 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
 779                                 skb->data, skb->len, btusb_tx_complete, skb);
 780
 781                 hdev->stat.cmd_tx++;
 782                 break;
 783
 784         case HCI_ACLDATA_PKT:
 785                 if (!data->bulk_tx_ep)
 786                         return -ENODEV;
 787
 788                 urb = usb_alloc_urb(0, GFP_ATOMIC);
 789                 if (!urb)
 790                         return -ENOMEM;
 791
 792                 pipe = usb_sndbulkpipe(data->udev,
 793                                         data->bulk_tx_ep->bEndpointAddress);
 794
 795                 usb_fill_bulk_urb(urb, data->udev, pipe,
 796                                 skb->data, skb->len, btusb_tx_complete, skb);
 797
 798                 hdev->stat.acl_tx++;
 799                 break;
 800
 801         case HCI_SCODATA_PKT:
 802                 if (!data->isoc_tx_ep || hdev->conn_hash.sco_num < 1)
 803                         return -ENODEV;
 804
 805                 urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_ATOMIC);
 806                 if (!urb)
 807                         return -ENOMEM;
 808
 809                 pipe = usb_sndisocpipe(data->udev,
 810                                         data->isoc_tx_ep->bEndpointAddress);
 811
 812                 usb_fill_int_urb(urb, data->udev, pipe,
 813                                 skb->data, skb->len, btusb_isoc_tx_complete,
 814                                 skb, data->isoc_tx_ep->bInterval);
 815
 816                 urb->transfer_flags  = URB_ISO_ASAP;
 817
 818                 __fill_isoc_descriptor(urb, skb->len,
 819                                 le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
 820
 821                 hdev->stat.sco_tx++;
 822                 goto skip_waking;
 823
 824         default:
 825                 return -EILSEQ;
 826         }
 827
 828         err = inc_tx(data);
 829         if (err) {
 830                 usb_anchor_urb(urb, &data->deferred);
 831                 schedule_work(&data->waker);
 832                 err = 0;
 833                 goto done;
 834         }
 835
 836 skip_waking:
 837         usb_anchor_urb(urb, &data->tx_anchor);
 838
 839         err = usb_submit_urb(urb, GFP_ATOMIC);
 840         if (err < 0) {
 841                 BT_ERR("%s urb %p submission failed", hdev->name, urb);
 842                 kfree(urb->setup_packet);
 843                 usb_unanchor_urb(urb);
 844         } else {
 845                 usb_mark_last_busy(data->udev);
 846         }
 847
 848 done:
 849         usb_free_urb(urb);
 850         return err;
 851 }
 852
 853 static void btusb_destruct(struct hci_dev *hdev)
 854 {
 855         struct btusb_data *data = hdev->driver_data;
 856
 857         BT_DBG("%s", hdev->name);
 858
 859         kfree(data);
 860 }
 861
 862 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
 863 {
 864         struct btusb_data *data = hdev->driver_data;
 865
 866         BT_DBG("%s evt %d", hdev->name, evt);
 867
 868         if (hdev->conn_hash.sco_num != data->sco_num) {
 869                 data->sco_num = hdev->conn_hash.sco_num;
 870                 schedule_work(&data->work);
 871         }
 872 }
 873
 874 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
 875 {
 876         struct btusb_data *data = hdev->driver_data;
 877         struct usb_interface *intf = data->isoc;
 878         struct usb_endpoint_descriptor *ep_desc;
 879         int i, err;
 880
 881         if (!data->isoc)
 882                 return -ENODEV;
 883
 884         err = usb_set_interface(data->udev, 1, altsetting);
 885         if (err < 0) {
 886                 BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
 887                 return err;
 888         }
 889
 890         data->isoc_altsetting = altsetting;
 891
 892         data->isoc_tx_ep = NULL;
 893         data->isoc_rx_ep = NULL;
 894
 895         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
 896                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
 897
 898                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
 899                         data->isoc_tx_ep = ep_desc;
 900                         continue;
 901                 }
 902
 903                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
 904                         data->isoc_rx_ep = ep_desc;
 905                         continue;
 906                 }
 907         }
 908
 909         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
 910                 BT_ERR("%s invalid SCO descriptors", hdev->name);
 911                 return -ENODEV;
 912         }
 913
 914         return 0;
 915 }
 916
 917 static void btusb_work(struct work_struct *work)
 918 {
 919         struct btusb_data *data = container_of(work, struct btusb_data, work);
 920         struct hci_dev *hdev = data->hdev;
 921         int err;
 922
 923         if (hdev->conn_hash.sco_num > 0) {
 924                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
 925                         err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
 926                         if (err < 0) {
 927                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 928                                 usb_kill_anchored_urbs(&data->isoc_anchor);
 929                                 return;
 930                         }
 931
 932                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
 933                 }
 934                 if (data->isoc_altsetting != 2) {
 935                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 936                         usb_kill_anchored_urbs(&data->isoc_anchor);
 937
 938                         if (__set_isoc_interface(hdev, 2) < 0)
 939                                 return;
 940                 }
 941
 942                 if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
 943                         if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
 944                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 945                         else
 946                                 btusb_submit_isoc_urb(hdev, GFP_KERNEL);
 947                 }
 948         } else {
 949                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 950                 usb_kill_anchored_urbs(&data->isoc_anchor);
 951
 952                 __set_isoc_interface(hdev, 0);
 953                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
 954                         usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
 955         }
 956 }
 957
 958 static void btusb_waker(struct work_struct *work)
 959 {
 960         struct btusb_data *data = container_of(work, struct btusb_data, waker);
 961         int err;
 962
 963         err = usb_autopm_get_interface(data->intf);
 964         if (err < 0)
 965                 return;
 966
 967         usb_autopm_put_interface(data->intf);
 968 }
 969
 970 static int btusb_probe(struct usb_interface *intf,
 971                                 const struct usb_device_id *id)
 972 {
 973         struct usb_endpoint_descriptor *ep_desc;
 974         struct btusb_data *data;
 975         struct hci_dev *hdev;
 976         int i, err;
 977
 978         BT_DBG("intf %p id %p", intf, id);
 979
 980         /* interface numbers are hardcoded in the spec */
 981         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 982                 return -ENODEV;
 983
 984         if (!id->driver_info) {
 985                 const struct usb_device_id *match;
 986                 match = usb_match_id(intf, blacklist_table);
 987                 if (match)
 988                         id = match;
 989         }
 990
 991         if (id->driver_info == BTUSB_IGNORE)
 992                 return -ENODEV;
 993
 994         if (ignore_dga && id->driver_info & BTUSB_DIGIANSWER)
 995                 return -ENODEV;
 996
 997         if (ignore_csr && id->driver_info & BTUSB_CSR)
 998                 return -ENODEV;
 999
1000         if (ignore_sniffer && id->driver_info & BTUSB_SNIFFER)
1001                 return -ENODEV;
1002
1003         if (id->driver_info & BTUSB_ATH3012) {
1004                 struct usb_device *udev = interface_to_usbdev(intf);
1005
1006                 /* Old firmware would otherwise let ath3k driver load
1007                  * patch and sysconfig files */
1008                 if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001)
1009                         return -ENODEV;
1010         }
1011
1012         data = kzalloc(sizeof(*data), GFP_KERNEL);
1013         if (!data)
1014                 return -ENOMEM;
1015
1016         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1017                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1018
1019                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
1020                         data->intr_ep = ep_desc;
1021                         continue;
1022                 }
1023
1024                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
1025                         data->bulk_tx_ep = ep_desc;
1026                         continue;
1027                 }
1028
1029                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
1030                         data->bulk_rx_ep = ep_desc;
1031                         continue;
1032                 }
1033         }
1034
1035         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep) {
1036                 kfree(data);
1037                 return -ENODEV;
1038         }
1039
1040         data->cmdreq_type = USB_TYPE_CLASS;
1041
1042         data->udev = interface_to_usbdev(intf);
1043         data->intf = intf;
1044
1045         spin_lock_init(&data->lock);
1046
1047         INIT_WORK(&data->work, btusb_work);
1048         INIT_WORK(&data->waker, btusb_waker);
1049         spin_lock_init(&data->txlock);
1050
1051         init_usb_anchor(&data->tx_anchor);
1052         init_usb_anchor(&data->intr_anchor);
1053         init_usb_anchor(&data->bulk_anchor);
1054         init_usb_anchor(&data->isoc_anchor);
1055         init_usb_anchor(&data->deferred);
1056
1057         hdev = hci_alloc_dev();
1058         if (!hdev) {
1059                 kfree(data);
1060                 return -ENOMEM;
1061         }
1062
1063         hdev->bus = HCI_USB;
1064         hdev->driver_data = data;
1065
1066         data->hdev = hdev;
1067
1068         SET_HCIDEV_DEV(hdev, &intf->dev);
1069
1070         hdev->open     = btusb_open;
1071         hdev->close    = btusb_close;
1072         hdev->flush    = btusb_flush;
1073         hdev->send     = btusb_send_frame;
1074         hdev->destruct = btusb_destruct;
1075         hdev->notify   = btusb_notify;
1076
1077         hdev->owner = THIS_MODULE;
1078
1079         if (id->driver_info & BTUSB_INTEL_BOOT)
1080                 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
1081
1082         /* Interface numbers are hardcoded in the specification */
1083         data->isoc = usb_ifnum_to_if(data->udev, 1);
1084
1085         if (!reset)
1086                 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
1087
1088         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
1089                 if (!disable_scofix)
1090                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
1091         }
1092
1093         if (id->driver_info & BTUSB_BROKEN_ISOC)
1094                 data->isoc = NULL;
1095
1096         if (id->driver_info & BTUSB_DIGIANSWER) {
1097                 data->cmdreq_type = USB_TYPE_VENDOR;
1098                 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
1099         }
1100
1101         if (id->driver_info & BTUSB_CSR) {
1102                 struct usb_device *udev = data->udev;
1103
1104                 /* Old firmware would otherwise execute USB reset */
1105                 if (le16_to_cpu(udev->descriptor.bcdDevice) < 0x117)
1106                         set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
1107         }
1108
1109         if (id->driver_info & BTUSB_SNIFFER) {
1110                 struct usb_device *udev = data->udev;
1111
1112                 /* New sniffer firmware has crippled HCI interface */
1113                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
1114                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
1115
1116                 data->isoc = NULL;
1117         }
1118
1119         if (id->driver_info & BTUSB_BCM92035) {
1120                 unsigned char cmd[] = { 0x3b, 0xfc, 0x01, 0x00 };
1121                 struct sk_buff *skb;
1122
1123                 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
1124                 if (skb) {
1125                         memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));
1126                         skb_queue_tail(&hdev->driver_init, skb);
1127                 }
1128         }
1129
1130         if (data->isoc) {
1131                 err = usb_driver_claim_interface(&btusb_driver,
1132                                                         data->isoc, data);
1133                 if (err < 0) {
1134                         hci_free_dev(hdev);
1135                         kfree(data);
1136                         return err;
1137                 }
1138         }
1139
1140         err = hci_register_dev(hdev);
1141         if (err < 0) {
1142                 hci_free_dev(hdev);
1143                 kfree(data);
1144                 return err;
1145         }
1146
1147         usb_set_intfdata(intf, data);
1148
1149         return 0;
1150 }
1151
1152 static void btusb_disconnect(struct usb_interface *intf)
1153 {
1154         struct btusb_data *data = usb_get_intfdata(intf);
1155         struct hci_dev *hdev;
1156
1157         BT_DBG("intf %p", intf);
1158
1159         if (!data)
1160                 return;
1161
1162         hdev = data->hdev;
1163
1164         __hci_dev_hold(hdev);
1165
1166         usb_set_intfdata(data->intf, NULL);
1167
1168         if (data->isoc)
1169                 usb_set_intfdata(data->isoc, NULL);
1170
1171         hci_unregister_dev(hdev);
1172
1173         if (intf == data->isoc)
1174                 usb_driver_release_interface(&btusb_driver, data->intf);
1175         else if (data->isoc)
1176                 usb_driver_release_interface(&btusb_driver, data->isoc);
1177
1178         __hci_dev_put(hdev);
1179
1180         hci_free_dev(hdev);
1181 }
1182
1183 #ifdef CONFIG_PM
1184 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
1185 {
1186         struct btusb_data *data = usb_get_intfdata(intf);
1187
1188         BT_DBG("intf %p", intf);
1189
1190         if (data->suspend_count++)
1191                 return 0;
1192
1193         spin_lock_irq(&data->txlock);
1194         if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
1195                 set_bit(BTUSB_SUSPENDING, &data->flags);
1196                 spin_unlock_irq(&data->txlock);
1197         } else {
1198                 spin_unlock_irq(&data->txlock);
1199                 data->suspend_count--;
1200                 return -EBUSY;
1201         }
1202
1203         cancel_work_sync(&data->work);
1204
1205         btusb_stop_traffic(data);
1206         usb_kill_anchored_urbs(&data->tx_anchor);
1207
1208         return 0;
1209 }
1210
1211 static void play_deferred(struct btusb_data *data)
1212 {
1213         struct urb *urb;
1214         int err;
1215
1216         while ((urb = usb_get_from_anchor(&data->deferred))) {
1217                 err = usb_submit_urb(urb, GFP_ATOMIC);
1218                 if (err < 0)
1219                         break;
1220
1221                 data->tx_in_flight++;
1222         }
1223         usb_scuttle_anchored_urbs(&data->deferred);
1224 }
1225
1226 static int btusb_resume(struct usb_interface *intf)
1227 {
1228         struct btusb_data *data = usb_get_intfdata(intf);
1229         struct hci_dev *hdev = data->hdev;
1230         int err = 0;
1231
1232         BT_DBG("intf %p", intf);
1233
1234         if (--data->suspend_count)
1235                 return 0;
1236
1237         if (!test_bit(HCI_RUNNING, &hdev->flags))
1238                 goto done;
1239
1240         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
1241                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
1242                 if (err < 0) {
1243                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1244                         goto failed;
1245                 }
1246         }
1247
1248         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
1249                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
1250                 if (err < 0) {
1251                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1252                         goto failed;
1253                 }
1254
1255                 btusb_submit_bulk_urb(hdev, GFP_NOIO);
1256         }
1257
1258         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1259                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
1260                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1261                 else
1262                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
1263         }
1264
1265         spin_lock_irq(&data->txlock);
1266         play_deferred(data);
1267         clear_bit(BTUSB_SUSPENDING, &data->flags);
1268         spin_unlock_irq(&data->txlock);
1269         schedule_work(&data->work);
1270
1271         return 0;
1272
1273 failed:
1274         usb_scuttle_anchored_urbs(&data->deferred);
1275 done:
1276         spin_lock_irq(&data->txlock);
1277         clear_bit(BTUSB_SUSPENDING, &data->flags);
1278         spin_unlock_irq(&data->txlock);
1279
1280         return err;
1281 }
1282 #endif
1283
1284 static struct usb_driver btusb_driver = {
1285         .name           = "btusb",
1286         .probe          = btusb_probe,
1287         .disconnect     = btusb_disconnect,
1288 #ifdef CONFIG_PM
1289         .suspend        = btusb_suspend,
1290         .resume         = btusb_resume,
1291 #endif
1292         .id_table       = btusb_table,
1293         .supports_autosuspend = 1,
1294 };
1295
1296 static int __init btusb_init(void)
1297 {
1298         BT_INFO("Generic Bluetooth USB driver ver %s", VERSION);
1299
1300         return usb_register(&btusb_driver);
1301 }
1302
1303 static void __exit btusb_exit(void)
1304 {
1305         usb_deregister(&btusb_driver);
1306 }
1307
1308 module_init(btusb_init);
1309 module_exit(btusb_exit);
1310
1311 module_param(ignore_dga, bool, 0644);
1312 MODULE_PARM_DESC(ignore_dga, "Ignore devices with id 08fd:0001");
1313
1314 module_param(ignore_csr, bool, 0644);
1315 MODULE_PARM_DESC(ignore_csr, "Ignore devices with id 0a12:0001");
1316
1317 module_param(ignore_sniffer, bool, 0644);
1318 MODULE_PARM_DESC(ignore_sniffer, "Ignore devices with id 0a12:0002");
1319
1320 module_param(disable_scofix, bool, 0644);
1321 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
1322
1323 module_param(force_scofix, bool, 0644);
1324 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
1325
1326 module_param(reset, bool, 0644);
1327 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
1328
1329 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
1330 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
1331 MODULE_VERSION(VERSION);
1332 MODULE_LICENSE("GPL");