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         /* ASUSTek Computer - Broadcom based */
 124         { USB_VENDOR_AND_INTERFACE_INFO(0x0b05, 0xff, 0x01, 0x01) },
 125
 126         /* Belkin F8065bf - Broadcom based */
 127         { USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01) },
 128
 129         /* IMC Networks - Broadcom based */
 130         { USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01) },
 131
 132         /* Intel Bluetooth USB Bootloader (RAM module) */
 133         { USB_DEVICE(0x8087, 0x0a5a),
 134           .driver_info = BTUSB_INTEL_BOOT | BTUSB_BROKEN_ISOC },
 135
 136         { }     /* Terminating entry */
 137 };
 138
 139 MODULE_DEVICE_TABLE(usb, btusb_table);
 140
 141 static struct usb_device_id blacklist_table[] = {
 142         /* CSR BlueCore devices */
 143         { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
 144
 145         /* Broadcom BCM2033 without firmware */
 146         { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
 147
 148         /* Atheros 3011 with sflash firmware */
 149         { USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
 150         { USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
 151         { USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
 152         { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
 153         { USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
 154         { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
 155
 156         /* Atheros AR9285 Malbec with sflash firmware */
 157         { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
 158
 159         /* Atheros 3012 with sflash firmware */
 160         { USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
 161         { USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
 162         { USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
 163         { USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
 164         { USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
 165         { USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
 166         { USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
 167         { USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
 168         { USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
 169         { USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
 170         { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
 171         { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
 172         { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
 173         { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
 174         { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
 175         { USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
 176         { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
 177         { USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
 178         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
 179         { USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
 180         { USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
 181         { USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },
 182         { USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },
 183         { USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
 184         { USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
 185         { USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
 186         { USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
 187         { USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
 188         { USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
 189         { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
 190         { USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
 191         { USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
 192         { USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
 193         { USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
 194
 195         /* Atheros AR5BBU12 with sflash firmware */
 196         { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
 197
 198         /* Atheros AR5BBU12 with sflash firmware */
 199         { USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
 200         { USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
 201
 202         /* Broadcom BCM2035 */
 203         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
 204         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
 205         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
 206
 207         /* Broadcom BCM2045 */
 208         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
 209         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
 210
 211         /* IBM/Lenovo ThinkPad with Broadcom chip */
 212         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
 213         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
 214
 215         /* HP laptop with Broadcom chip */
 216         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
 217
 218         /* Dell laptop with Broadcom chip */
 219         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
 220
 221         /* Dell Wireless 370 and 410 devices */
 222         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
 223         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
 224
 225         /* Belkin F8T012 and F8T013 devices */
 226         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
 227         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
 228
 229         /* Asus WL-BTD202 device */
 230         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
 231
 232         /* Kensington Bluetooth USB adapter */
 233         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
 234
 235         /* RTX Telecom based adapters with buggy SCO support */
 236         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
 237         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
 238
 239         /* CONWISE Technology based adapters with buggy SCO support */
 240         { USB_DEVICE(0x0e5e, 0x6622), .driver_info = BTUSB_BROKEN_ISOC },
 241
 242         /* Digianswer devices */
 243         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
 244         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
 245
 246         /* CSR BlueCore Bluetooth Sniffer */
 247         { USB_DEVICE(0x0a12, 0x0002), .driver_info = BTUSB_SNIFFER },
 248
 249         /* Frontline ComProbe Bluetooth Sniffer */
 250         { USB_DEVICE(0x16d3, 0x0002), .driver_info = BTUSB_SNIFFER },
 251
 252         { }     /* Terminating entry */
 253 };
 254
 255 #define BTUSB_MAX_ISOC_FRAMES   10
 256
 257 #define BTUSB_INTR_RUNNING      0
 258 #define BTUSB_BULK_RUNNING      1
 259 #define BTUSB_ISOC_RUNNING      2
 260 #define BTUSB_SUSPENDING        3
 261 #define BTUSB_DID_ISO_RESUME    4
 262
 263 struct btusb_data {
 264         struct hci_dev       *hdev;
 265         struct usb_device    *udev;
 266         struct usb_interface *intf;
 267         struct usb_interface *isoc;
 268
 269         spinlock_t lock;
 270
 271         unsigned long flags;
 272
 273         struct work_struct work;
 274         struct work_struct waker;
 275
 276         struct usb_anchor tx_anchor;
 277         struct usb_anchor intr_anchor;
 278         struct usb_anchor bulk_anchor;
 279         struct usb_anchor isoc_anchor;
 280         struct usb_anchor deferred;
 281         int tx_in_flight;
 282         spinlock_t txlock;
 283
 284         struct usb_endpoint_descriptor *intr_ep;
 285         struct usb_endpoint_descriptor *bulk_tx_ep;
 286         struct usb_endpoint_descriptor *bulk_rx_ep;
 287         struct usb_endpoint_descriptor *isoc_tx_ep;
 288         struct usb_endpoint_descriptor *isoc_rx_ep;
 289
 290         __u8 cmdreq_type;
 291
 292         unsigned int sco_num;
 293         int isoc_altsetting;
 294         int suspend_count;
 295 };
 296
 297 static int inc_tx(struct btusb_data *data)
 298 {
 299         unsigned long flags;
 300         int rv;
 301
 302         spin_lock_irqsave(&data->txlock, flags);
 303         rv = test_bit(BTUSB_SUSPENDING, &data->flags);
 304         if (!rv)
 305                 data->tx_in_flight++;
 306         spin_unlock_irqrestore(&data->txlock, flags);
 307
 308         return rv;
 309 }
 310
 311 static void btusb_intr_complete(struct urb *urb)
 312 {
 313         struct hci_dev *hdev = urb->context;
 314         struct btusb_data *data = hdev->driver_data;
 315         int err;
 316
 317         BT_DBG("%s urb %p status %d count %d", hdev->name,
 318                                         urb, urb->status, urb->actual_length);
 319
 320         if (!test_bit(HCI_RUNNING, &hdev->flags))
 321                 return;
 322
 323         if (urb->status == 0) {
 324                 hdev->stat.byte_rx += urb->actual_length;
 325
 326                 if (hci_recv_fragment(hdev, HCI_EVENT_PKT,
 327                                                 urb->transfer_buffer,
 328                                                 urb->actual_length) < 0) {
 329                         BT_ERR("%s corrupted event packet", hdev->name);
 330                         hdev->stat.err_rx++;
 331                 }
 332         } else if (urb->status == -ENOENT) {
 333                 /* Avoid suspend failed when usb_kill_urb */
 334                 return;
 335         }
 336
 337         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
 338                 return;
 339
 340         usb_mark_last_busy(data->udev);
 341         usb_anchor_urb(urb, &data->intr_anchor);
 342
 343         err = usb_submit_urb(urb, GFP_ATOMIC);
 344         if (err < 0) {
 345                 /* -EPERM: urb is being killed;
 346                  * -ENODEV: device got disconnected */
 347                 if (err != -EPERM && err != -ENODEV)
 348                         BT_ERR("%s urb %p failed to resubmit (%d)",
 349                                                 hdev->name, urb, -err);
 350                 usb_unanchor_urb(urb);
 351         }
 352 }
 353
 354 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
 355 {
 356         struct btusb_data *data = hdev->driver_data;
 357         struct urb *urb;
 358         unsigned char *buf;
 359         unsigned int pipe;
 360         int err, size;
 361
 362         BT_DBG("%s", hdev->name);
 363
 364         if (!data->intr_ep)
 365                 return -ENODEV;
 366
 367         urb = usb_alloc_urb(0, mem_flags);
 368         if (!urb)
 369                 return -ENOMEM;
 370
 371         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
 372
 373         buf = kmalloc(size, mem_flags);
 374         if (!buf) {
 375                 usb_free_urb(urb);
 376                 return -ENOMEM;
 377         }
 378
 379         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
 380
 381         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
 382                                                 btusb_intr_complete, hdev,
 383                                                 data->intr_ep->bInterval);
 384
 385         urb->transfer_flags |= URB_FREE_BUFFER;
 386
 387         usb_anchor_urb(urb, &data->intr_anchor);
 388
 389         err = usb_submit_urb(urb, mem_flags);
 390         if (err < 0) {
 391                 BT_ERR("%s urb %p submission failed (%d)",
 392                                                 hdev->name, urb, -err);
 393                 usb_unanchor_urb(urb);
 394         }
 395
 396         usb_free_urb(urb);
 397
 398         return err;
 399 }
 400
 401 static void btusb_bulk_complete(struct urb *urb)
 402 {
 403         struct hci_dev *hdev = urb->context;
 404         struct btusb_data *data = hdev->driver_data;
 405         int err;
 406
 407         BT_DBG("%s urb %p status %d count %d", hdev->name,
 408                                         urb, urb->status, urb->actual_length);
 409
 410         if (!test_bit(HCI_RUNNING, &hdev->flags))
 411                 return;
 412
 413         if (urb->status == 0) {
 414                 hdev->stat.byte_rx += urb->actual_length;
 415
 416                 if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT,
 417                                                 urb->transfer_buffer,
 418                                                 urb->actual_length) < 0) {
 419                         BT_ERR("%s corrupted ACL packet", hdev->name);
 420                         hdev->stat.err_rx++;
 421                 }
 422         } else if (urb->status == -ENOENT) {
 423                 /* Avoid suspend failed when usb_kill_urb */
 424                 return;
 425         }
 426
 427         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
 428                 return;
 429
 430         usb_anchor_urb(urb, &data->bulk_anchor);
 431         usb_mark_last_busy(data->udev);
 432
 433         err = usb_submit_urb(urb, GFP_ATOMIC);
 434         if (err < 0) {
 435                 /* -EPERM: urb is being killed;
 436                  * -ENODEV: device got disconnected */
 437                 if (err != -EPERM && err != -ENODEV)
 438                         BT_ERR("%s urb %p failed to resubmit (%d)",
 439                                                 hdev->name, urb, -err);
 440                 usb_unanchor_urb(urb);
 441         }
 442 }
 443
 444 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
 445 {
 446         struct btusb_data *data = hdev->driver_data;
 447         struct urb *urb;
 448         unsigned char *buf;
 449         unsigned int pipe;
 450         int err, size = HCI_MAX_FRAME_SIZE;
 451
 452         BT_DBG("%s", hdev->name);
 453
 454         if (!data->bulk_rx_ep)
 455                 return -ENODEV;
 456
 457         urb = usb_alloc_urb(0, mem_flags);
 458         if (!urb)
 459                 return -ENOMEM;
 460
 461         buf = kmalloc(size, mem_flags);
 462         if (!buf) {
 463                 usb_free_urb(urb);
 464                 return -ENOMEM;
 465         }
 466
 467         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
 468
 469         usb_fill_bulk_urb(urb, data->udev, pipe,
 470                                         buf, size, btusb_bulk_complete, hdev);
 471
 472         urb->transfer_flags |= URB_FREE_BUFFER;
 473
 474         usb_mark_last_busy(data->udev);
 475         usb_anchor_urb(urb, &data->bulk_anchor);
 476
 477         err = usb_submit_urb(urb, mem_flags);
 478         if (err < 0) {
 479                 BT_ERR("%s urb %p submission failed (%d)",
 480                                                 hdev->name, urb, -err);
 481                 usb_unanchor_urb(urb);
 482         }
 483
 484         usb_free_urb(urb);
 485
 486         return err;
 487 }
 488
 489 static void btusb_isoc_complete(struct urb *urb)
 490 {
 491         struct hci_dev *hdev = urb->context;
 492         struct btusb_data *data = hdev->driver_data;
 493         int i, err;
 494
 495         BT_DBG("%s urb %p status %d count %d", hdev->name,
 496                                         urb, urb->status, urb->actual_length);
 497
 498         if (!test_bit(HCI_RUNNING, &hdev->flags))
 499                 return;
 500
 501         if (urb->status == 0) {
 502                 for (i = 0; i < urb->number_of_packets; i++) {
 503                         unsigned int offset = urb->iso_frame_desc[i].offset;
 504                         unsigned int length = urb->iso_frame_desc[i].actual_length;
 505
 506                         if (urb->iso_frame_desc[i].status)
 507                                 continue;
 508
 509                         hdev->stat.byte_rx += length;
 510
 511                         if (hci_recv_fragment(hdev, HCI_SCODATA_PKT,
 512                                                 urb->transfer_buffer + offset,
 513                                                                 length) < 0) {
 514                                 BT_ERR("%s corrupted SCO packet", hdev->name);
 515                                 hdev->stat.err_rx++;
 516                         }
 517                 }
 518         } else if (urb->status == -ENOENT) {
 519                 /* Avoid suspend failed when usb_kill_urb */
 520                 return;
 521         }
 522
 523         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
 524                 return;
 525
 526         usb_anchor_urb(urb, &data->isoc_anchor);
 527
 528         err = usb_submit_urb(urb, GFP_ATOMIC);
 529         if (err < 0) {
 530                 /* -EPERM: urb is being killed;
 531                  * -ENODEV: device got disconnected */
 532                 if (err != -EPERM && err != -ENODEV)
 533                         BT_ERR("%s urb %p failed to resubmit (%d)",
 534                                                 hdev->name, urb, -err);
 535                 usb_unanchor_urb(urb);
 536         }
 537 }
 538
 539 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
 540 {
 541         int i, offset = 0;
 542
 543         BT_DBG("len %d mtu %d", len, mtu);
 544
 545         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
 546                                         i++, offset += mtu, len -= mtu) {
 547                 urb->iso_frame_desc[i].offset = offset;
 548                 urb->iso_frame_desc[i].length = mtu;
 549         }
 550
 551         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
 552                 urb->iso_frame_desc[i].offset = offset;
 553                 urb->iso_frame_desc[i].length = len;
 554                 i++;
 555         }
 556
 557         urb->number_of_packets = i;
 558 }
 559
 560 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
 561 {
 562         struct btusb_data *data = hdev->driver_data;
 563         struct urb *urb;
 564         unsigned char *buf;
 565         unsigned int pipe;
 566         int err, size;
 567
 568         BT_DBG("%s", hdev->name);
 569
 570         if (!data->isoc_rx_ep)
 571                 return -ENODEV;
 572
 573         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
 574         if (!urb)
 575                 return -ENOMEM;
 576
 577         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
 578                                                 BTUSB_MAX_ISOC_FRAMES;
 579
 580         buf = kmalloc(size, mem_flags);
 581         if (!buf) {
 582                 usb_free_urb(urb);
 583                 return -ENOMEM;
 584         }
 585
 586         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
 587
 588         usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
 589                                 hdev, data->isoc_rx_ep->bInterval);
 590
 591         urb->transfer_flags  = URB_FREE_BUFFER | URB_ISO_ASAP;
 592
 593         __fill_isoc_descriptor(urb, size,
 594                         le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
 595
 596         usb_anchor_urb(urb, &data->isoc_anchor);
 597
 598         err = usb_submit_urb(urb, mem_flags);
 599         if (err < 0) {
 600                 BT_ERR("%s urb %p submission failed (%d)",
 601                                                 hdev->name, urb, -err);
 602                 usb_unanchor_urb(urb);
 603         }
 604
 605         usb_free_urb(urb);
 606
 607         return err;
 608 }
 609
 610 static void btusb_tx_complete(struct urb *urb)
 611 {
 612         struct sk_buff *skb = urb->context;
 613         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 614         struct btusb_data *data = hdev->driver_data;
 615
 616         BT_DBG("%s urb %p status %d count %d", hdev->name,
 617                                         urb, urb->status, urb->actual_length);
 618
 619         if (!test_bit(HCI_RUNNING, &hdev->flags))
 620                 goto done;
 621
 622         if (!urb->status)
 623                 hdev->stat.byte_tx += urb->transfer_buffer_length;
 624         else
 625                 hdev->stat.err_tx++;
 626
 627 done:
 628         spin_lock(&data->txlock);
 629         data->tx_in_flight--;
 630         spin_unlock(&data->txlock);
 631
 632         kfree(urb->setup_packet);
 633
 634         kfree_skb(skb);
 635 }
 636
 637 static void btusb_isoc_tx_complete(struct urb *urb)
 638 {
 639         struct sk_buff *skb = urb->context;
 640         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 641
 642         BT_DBG("%s urb %p status %d count %d", hdev->name,
 643                                         urb, urb->status, urb->actual_length);
 644
 645         if (!test_bit(HCI_RUNNING, &hdev->flags))
 646                 goto done;
 647
 648         if (!urb->status)
 649                 hdev->stat.byte_tx += urb->transfer_buffer_length;
 650         else
 651                 hdev->stat.err_tx++;
 652
 653 done:
 654         kfree(urb->setup_packet);
 655
 656         kfree_skb(skb);
 657 }
 658
 659 static int btusb_open(struct hci_dev *hdev)
 660 {
 661         struct btusb_data *data = hdev->driver_data;
 662         int err;
 663
 664         BT_DBG("%s", hdev->name);
 665
 666         err = usb_autopm_get_interface(data->intf);
 667         if (err < 0)
 668                 return err;
 669
 670         data->intf->needs_remote_wakeup = 1;
 671
 672         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
 673                 goto done;
 674
 675         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
 676                 goto done;
 677
 678         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
 679         if (err < 0)
 680                 goto failed;
 681
 682         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
 683         if (err < 0) {
 684                 usb_kill_anchored_urbs(&data->intr_anchor);
 685                 goto failed;
 686         }
 687
 688         set_bit(BTUSB_BULK_RUNNING, &data->flags);
 689         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
 690
 691 done:
 692         usb_autopm_put_interface(data->intf);
 693         return 0;
 694
 695 failed:
 696         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
 697         clear_bit(HCI_RUNNING, &hdev->flags);
 698         usb_autopm_put_interface(data->intf);
 699         return err;
 700 }
 701
 702 static void btusb_stop_traffic(struct btusb_data *data)
 703 {
 704         usb_kill_anchored_urbs(&data->intr_anchor);
 705         usb_kill_anchored_urbs(&data->bulk_anchor);
 706         usb_kill_anchored_urbs(&data->isoc_anchor);
 707 }
 708
 709 static int btusb_close(struct hci_dev *hdev)
 710 {
 711         struct btusb_data *data = hdev->driver_data;
 712         int err;
 713
 714         BT_DBG("%s", hdev->name);
 715
 716         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 717                 return 0;
 718
 719         cancel_work_sync(&data->work);
 720         cancel_work_sync(&data->waker);
 721
 722         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 723         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
 724         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
 725
 726         btusb_stop_traffic(data);
 727         err = usb_autopm_get_interface(data->intf);
 728         if (err < 0)
 729                 goto failed;
 730
 731         data->intf->needs_remote_wakeup = 0;
 732         usb_autopm_put_interface(data->intf);
 733
 734 failed:
 735         usb_scuttle_anchored_urbs(&data->deferred);
 736         return 0;
 737 }
 738
 739 static int btusb_flush(struct hci_dev *hdev)
 740 {
 741         struct btusb_data *data = hdev->driver_data;
 742
 743         BT_DBG("%s", hdev->name);
 744
 745         usb_kill_anchored_urbs(&data->tx_anchor);
 746
 747         return 0;
 748 }
 749
 750 static int btusb_send_frame(struct sk_buff *skb)
 751 {
 752         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 753         struct btusb_data *data = hdev->driver_data;
 754         struct usb_ctrlrequest *dr;
 755         struct urb *urb;
 756         unsigned int pipe;
 757         int err;
 758
 759         BT_DBG("%s", hdev->name);
 760
 761         if (!test_bit(HCI_RUNNING, &hdev->flags))
 762                 return -EBUSY;
 763
 764         switch (bt_cb(skb)->pkt_type) {
 765         case HCI_COMMAND_PKT:
 766                 urb = usb_alloc_urb(0, GFP_ATOMIC);
 767                 if (!urb)
 768                         return -ENOMEM;
 769
 770                 dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
 771                 if (!dr) {
 772                         usb_free_urb(urb);
 773                         return -ENOMEM;
 774                 }
 775
 776                 dr->bRequestType = data->cmdreq_type;
 777                 dr->bRequest     = 0;
 778                 dr->wIndex       = 0;
 779                 dr->wValue       = 0;
 780                 dr->wLength      = __cpu_to_le16(skb->len);
 781
 782                 pipe = usb_sndctrlpipe(data->udev, 0x00);
 783
 784                 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
 785                                 skb->data, skb->len, btusb_tx_complete, skb);
 786
 787                 hdev->stat.cmd_tx++;
 788                 break;
 789
 790         case HCI_ACLDATA_PKT:
 791                 if (!data->bulk_tx_ep)
 792                         return -ENODEV;
 793
 794                 urb = usb_alloc_urb(0, GFP_ATOMIC);
 795                 if (!urb)
 796                         return -ENOMEM;
 797
 798                 pipe = usb_sndbulkpipe(data->udev,
 799                                         data->bulk_tx_ep->bEndpointAddress);
 800
 801                 usb_fill_bulk_urb(urb, data->udev, pipe,
 802                                 skb->data, skb->len, btusb_tx_complete, skb);
 803
 804                 hdev->stat.acl_tx++;
 805                 break;
 806
 807         case HCI_SCODATA_PKT:
 808                 if (!data->isoc_tx_ep || hdev->conn_hash.sco_num < 1)
 809                         return -ENODEV;
 810
 811                 urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_ATOMIC);
 812                 if (!urb)
 813                         return -ENOMEM;
 814
 815                 pipe = usb_sndisocpipe(data->udev,
 816                                         data->isoc_tx_ep->bEndpointAddress);
 817
 818                 usb_fill_int_urb(urb, data->udev, pipe,
 819                                 skb->data, skb->len, btusb_isoc_tx_complete,
 820                                 skb, data->isoc_tx_ep->bInterval);
 821
 822                 urb->transfer_flags  = URB_ISO_ASAP;
 823
 824                 __fill_isoc_descriptor(urb, skb->len,
 825                                 le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
 826
 827                 hdev->stat.sco_tx++;
 828                 goto skip_waking;
 829
 830         default:
 831                 return -EILSEQ;
 832         }
 833
 834         err = inc_tx(data);
 835         if (err) {
 836                 usb_anchor_urb(urb, &data->deferred);
 837                 schedule_work(&data->waker);
 838                 err = 0;
 839                 goto done;
 840         }
 841
 842 skip_waking:
 843         usb_anchor_urb(urb, &data->tx_anchor);
 844
 845         err = usb_submit_urb(urb, GFP_ATOMIC);
 846         if (err < 0) {
 847                 BT_ERR("%s urb %p submission failed", hdev->name, urb);
 848                 kfree(urb->setup_packet);
 849                 usb_unanchor_urb(urb);
 850         } else {
 851                 usb_mark_last_busy(data->udev);
 852         }
 853
 854 done:
 855         usb_free_urb(urb);
 856         return err;
 857 }
 858
 859 static void btusb_destruct(struct hci_dev *hdev)
 860 {
 861         struct btusb_data *data = hdev->driver_data;
 862
 863         BT_DBG("%s", hdev->name);
 864
 865         kfree(data);
 866 }
 867
 868 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
 869 {
 870         struct btusb_data *data = hdev->driver_data;
 871
 872         BT_DBG("%s evt %d", hdev->name, evt);
 873
 874         if (hdev->conn_hash.sco_num != data->sco_num) {
 875                 data->sco_num = hdev->conn_hash.sco_num;
 876                 schedule_work(&data->work);
 877         }
 878 }
 879
 880 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
 881 {
 882         struct btusb_data *data = hdev->driver_data;
 883         struct usb_interface *intf = data->isoc;
 884         struct usb_endpoint_descriptor *ep_desc;
 885         int i, err;
 886
 887         if (!data->isoc)
 888                 return -ENODEV;
 889
 890         err = usb_set_interface(data->udev, 1, altsetting);
 891         if (err < 0) {
 892                 BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
 893                 return err;
 894         }
 895
 896         data->isoc_altsetting = altsetting;
 897
 898         data->isoc_tx_ep = NULL;
 899         data->isoc_rx_ep = NULL;
 900
 901         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
 902                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
 903
 904                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
 905                         data->isoc_tx_ep = ep_desc;
 906                         continue;
 907                 }
 908
 909                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
 910                         data->isoc_rx_ep = ep_desc;
 911                         continue;
 912                 }
 913         }
 914
 915         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
 916                 BT_ERR("%s invalid SCO descriptors", hdev->name);
 917                 return -ENODEV;
 918         }
 919
 920         return 0;
 921 }
 922
 923 static void btusb_work(struct work_struct *work)
 924 {
 925         struct btusb_data *data = container_of(work, struct btusb_data, work);
 926         struct hci_dev *hdev = data->hdev;
 927         int err;
 928
 929         if (hdev->conn_hash.sco_num > 0) {
 930                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
 931                         err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
 932                         if (err < 0) {
 933                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 934                                 usb_kill_anchored_urbs(&data->isoc_anchor);
 935                                 return;
 936                         }
 937
 938                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
 939                 }
 940                 if (data->isoc_altsetting != 2) {
 941                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 942                         usb_kill_anchored_urbs(&data->isoc_anchor);
 943
 944                         if (__set_isoc_interface(hdev, 2) < 0)
 945                                 return;
 946                 }
 947
 948                 if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
 949                         if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
 950                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 951                         else
 952                                 btusb_submit_isoc_urb(hdev, GFP_KERNEL);
 953                 }
 954         } else {
 955                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 956                 usb_kill_anchored_urbs(&data->isoc_anchor);
 957
 958                 __set_isoc_interface(hdev, 0);
 959                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
 960                         usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
 961         }
 962 }
 963
 964 static void btusb_waker(struct work_struct *work)
 965 {
 966         struct btusb_data *data = container_of(work, struct btusb_data, waker);
 967         int err;
 968
 969         err = usb_autopm_get_interface(data->intf);
 970         if (err < 0)
 971                 return;
 972
 973         usb_autopm_put_interface(data->intf);
 974 }
 975
 976 static int btusb_probe(struct usb_interface *intf,
 977                                 const struct usb_device_id *id)
 978 {
 979         struct usb_endpoint_descriptor *ep_desc;
 980         struct btusb_data *data;
 981         struct hci_dev *hdev;
 982         int i, err;
 983
 984         BT_DBG("intf %p id %p", intf, id);
 985
 986         /* interface numbers are hardcoded in the spec */
 987         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 988                 return -ENODEV;
 989
 990         if (!id->driver_info) {
 991                 const struct usb_device_id *match;
 992                 match = usb_match_id(intf, blacklist_table);
 993                 if (match)
 994                         id = match;
 995         }
 996
 997         if (id->driver_info == BTUSB_IGNORE)
 998                 return -ENODEV;
 999
1000         if (ignore_dga && id->driver_info & BTUSB_DIGIANSWER)
1001                 return -ENODEV;
1002
1003         if (ignore_csr && id->driver_info & BTUSB_CSR)
1004                 return -ENODEV;
1005
1006         if (ignore_sniffer && id->driver_info & BTUSB_SNIFFER)
1007                 return -ENODEV;
1008
1009         if (id->driver_info & BTUSB_ATH3012) {
1010                 struct usb_device *udev = interface_to_usbdev(intf);
1011
1012                 /* Old firmware would otherwise let ath3k driver load
1013                  * patch and sysconfig files */
1014                 if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001)
1015                         return -ENODEV;
1016         }
1017
1018         data = kzalloc(sizeof(*data), GFP_KERNEL);
1019         if (!data)
1020                 return -ENOMEM;
1021
1022         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1023                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1024
1025                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
1026                         data->intr_ep = ep_desc;
1027                         continue;
1028                 }
1029
1030                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
1031                         data->bulk_tx_ep = ep_desc;
1032                         continue;
1033                 }
1034
1035                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
1036                         data->bulk_rx_ep = ep_desc;
1037                         continue;
1038                 }
1039         }
1040
1041         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep) {
1042                 kfree(data);
1043                 return -ENODEV;
1044         }
1045
1046         data->cmdreq_type = USB_TYPE_CLASS;
1047
1048         data->udev = interface_to_usbdev(intf);
1049         data->intf = intf;
1050
1051         spin_lock_init(&data->lock);
1052
1053         INIT_WORK(&data->work, btusb_work);
1054         INIT_WORK(&data->waker, btusb_waker);
1055         spin_lock_init(&data->txlock);
1056
1057         init_usb_anchor(&data->tx_anchor);
1058         init_usb_anchor(&data->intr_anchor);
1059         init_usb_anchor(&data->bulk_anchor);
1060         init_usb_anchor(&data->isoc_anchor);
1061         init_usb_anchor(&data->deferred);
1062
1063         hdev = hci_alloc_dev();
1064         if (!hdev) {
1065                 kfree(data);
1066                 return -ENOMEM;
1067         }
1068
1069         hdev->bus = HCI_USB;
1070         hdev->driver_data = data;
1071
1072         data->hdev = hdev;
1073
1074         SET_HCIDEV_DEV(hdev, &intf->dev);
1075
1076         hdev->open     = btusb_open;
1077         hdev->close    = btusb_close;
1078         hdev->flush    = btusb_flush;
1079         hdev->send     = btusb_send_frame;
1080         hdev->destruct = btusb_destruct;
1081         hdev->notify   = btusb_notify;
1082
1083         hdev->owner = THIS_MODULE;
1084
1085         if (id->driver_info & BTUSB_INTEL_BOOT)
1086                 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
1087
1088         /* Interface numbers are hardcoded in the specification */
1089         data->isoc = usb_ifnum_to_if(data->udev, 1);
1090
1091         if (!reset)
1092                 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
1093
1094         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
1095                 if (!disable_scofix)
1096                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
1097         }
1098
1099         if (id->driver_info & BTUSB_BROKEN_ISOC)
1100                 data->isoc = NULL;
1101
1102         if (id->driver_info & BTUSB_DIGIANSWER) {
1103                 data->cmdreq_type = USB_TYPE_VENDOR;
1104                 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
1105         }
1106
1107         if (id->driver_info & BTUSB_CSR) {
1108                 struct usb_device *udev = data->udev;
1109
1110                 /* Old firmware would otherwise execute USB reset */
1111                 if (le16_to_cpu(udev->descriptor.bcdDevice) < 0x117)
1112                         set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
1113         }
1114
1115         if (id->driver_info & BTUSB_SNIFFER) {
1116                 struct usb_device *udev = data->udev;
1117
1118                 /* New sniffer firmware has crippled HCI interface */
1119                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
1120                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
1121
1122                 data->isoc = NULL;
1123         }
1124
1125         if (id->driver_info & BTUSB_BCM92035) {
1126                 unsigned char cmd[] = { 0x3b, 0xfc, 0x01, 0x00 };
1127                 struct sk_buff *skb;
1128
1129                 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
1130                 if (skb) {
1131                         memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));
1132                         skb_queue_tail(&hdev->driver_init, skb);
1133                 }
1134         }
1135
1136         if (data->isoc) {
1137                 err = usb_driver_claim_interface(&btusb_driver,
1138                                                         data->isoc, data);
1139                 if (err < 0) {
1140                         hci_free_dev(hdev);
1141                         kfree(data);
1142                         return err;
1143                 }
1144         }
1145
1146         err = hci_register_dev(hdev);
1147         if (err < 0) {
1148                 hci_free_dev(hdev);
1149                 kfree(data);
1150                 return err;
1151         }
1152
1153         usb_set_intfdata(intf, data);
1154
1155         return 0;
1156 }
1157
1158 static void btusb_disconnect(struct usb_interface *intf)
1159 {
1160         struct btusb_data *data = usb_get_intfdata(intf);
1161         struct hci_dev *hdev;
1162
1163         BT_DBG("intf %p", intf);
1164
1165         if (!data)
1166                 return;
1167
1168         hdev = data->hdev;
1169
1170         __hci_dev_hold(hdev);
1171
1172         usb_set_intfdata(data->intf, NULL);
1173
1174         if (data->isoc)
1175                 usb_set_intfdata(data->isoc, NULL);
1176
1177         hci_unregister_dev(hdev);
1178
1179         if (intf == data->isoc)
1180                 usb_driver_release_interface(&btusb_driver, data->intf);
1181         else if (data->isoc)
1182                 usb_driver_release_interface(&btusb_driver, data->isoc);
1183
1184         __hci_dev_put(hdev);
1185
1186         hci_free_dev(hdev);
1187 }
1188
1189 #ifdef CONFIG_PM
1190 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
1191 {
1192         struct btusb_data *data = usb_get_intfdata(intf);
1193
1194         BT_DBG("intf %p", intf);
1195
1196         if (data->suspend_count++)
1197                 return 0;
1198
1199         spin_lock_irq(&data->txlock);
1200         if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
1201                 set_bit(BTUSB_SUSPENDING, &data->flags);
1202                 spin_unlock_irq(&data->txlock);
1203         } else {
1204                 spin_unlock_irq(&data->txlock);
1205                 data->suspend_count--;
1206                 return -EBUSY;
1207         }
1208
1209         cancel_work_sync(&data->work);
1210
1211         btusb_stop_traffic(data);
1212         usb_kill_anchored_urbs(&data->tx_anchor);
1213
1214         return 0;
1215 }
1216
1217 static void play_deferred(struct btusb_data *data)
1218 {
1219         struct urb *urb;
1220         int err;
1221
1222         while ((urb = usb_get_from_anchor(&data->deferred))) {
1223                 err = usb_submit_urb(urb, GFP_ATOMIC);
1224                 if (err < 0)
1225                         break;
1226
1227                 data->tx_in_flight++;
1228         }
1229         usb_scuttle_anchored_urbs(&data->deferred);
1230 }
1231
1232 static int btusb_resume(struct usb_interface *intf)
1233 {
1234         struct btusb_data *data = usb_get_intfdata(intf);
1235         struct hci_dev *hdev = data->hdev;
1236         int err = 0;
1237
1238         BT_DBG("intf %p", intf);
1239
1240         if (--data->suspend_count)
1241                 return 0;
1242
1243         if (!test_bit(HCI_RUNNING, &hdev->flags))
1244                 goto done;
1245
1246         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
1247                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
1248                 if (err < 0) {
1249                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1250                         goto failed;
1251                 }
1252         }
1253
1254         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
1255                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
1256                 if (err < 0) {
1257                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1258                         goto failed;
1259                 }
1260
1261                 btusb_submit_bulk_urb(hdev, GFP_NOIO);
1262         }
1263
1264         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1265                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
1266                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1267                 else
1268                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
1269         }
1270
1271         spin_lock_irq(&data->txlock);
1272         play_deferred(data);
1273         clear_bit(BTUSB_SUSPENDING, &data->flags);
1274         spin_unlock_irq(&data->txlock);
1275         schedule_work(&data->work);
1276
1277         return 0;
1278
1279 failed:
1280         usb_scuttle_anchored_urbs(&data->deferred);
1281 done:
1282         spin_lock_irq(&data->txlock);
1283         clear_bit(BTUSB_SUSPENDING, &data->flags);
1284         spin_unlock_irq(&data->txlock);
1285
1286         return err;
1287 }
1288 #endif
1289
1290 static struct usb_driver btusb_driver = {
1291         .name           = "btusb",
1292         .probe          = btusb_probe,
1293         .disconnect     = btusb_disconnect,
1294 #ifdef CONFIG_PM
1295         .suspend        = btusb_suspend,
1296         .resume         = btusb_resume,
1297 #endif
1298         .id_table       = btusb_table,
1299         .supports_autosuspend = 1,
1300 };
1301
1302 static int __init btusb_init(void)
1303 {
1304         BT_INFO("Generic Bluetooth USB driver ver %s", VERSION);
1305
1306         return usb_register(&btusb_driver);
1307 }
1308
1309 static void __exit btusb_exit(void)
1310 {
1311         usb_deregister(&btusb_driver);
1312 }
1313
1314 module_init(btusb_init);
1315 module_exit(btusb_exit);
1316
1317 module_param(ignore_dga, bool, 0644);
1318 MODULE_PARM_DESC(ignore_dga, "Ignore devices with id 08fd:0001");
1319
1320 module_param(ignore_csr, bool, 0644);
1321 MODULE_PARM_DESC(ignore_csr, "Ignore devices with id 0a12:0001");
1322
1323 module_param(ignore_sniffer, bool, 0644);
1324 MODULE_PARM_DESC(ignore_sniffer, "Ignore devices with id 0a12:0002");
1325
1326 module_param(disable_scofix, bool, 0644);
1327 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
1328
1329 module_param(force_scofix, bool, 0644);
1330 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
1331
1332 module_param(reset, bool, 0644);
1333 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
1334
1335 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
1336 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
1337 MODULE_VERSION(VERSION);
1338 MODULE_LICENSE("GPL");