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