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