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
  59 static struct usb_device_id btusb_table[] = {
  60         /* Generic Bluetooth USB device */
  61         { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
  62
  63         /* Broadcom SoftSailing reporting vendor specific */
  64         { USB_DEVICE(0x05ac, 0x21e1) },
  65
  66         /* Apple MacBookPro 7,1 */
  67         { USB_DEVICE(0x05ac, 0x8213) },
  68
  69         /* Apple iMac11,1 */
  70         { USB_DEVICE(0x05ac, 0x8215) },
  71
  72         /* Apple MacBookPro6,2 */
  73         { USB_DEVICE(0x05ac, 0x8218) },
  74
  75         /* Apple MacBookAir3,1, MacBookAir3,2 */
  76         { USB_DEVICE(0x05ac, 0x821b) },
  77
  78         /* Apple MacBookAir4,1 */
  79         { USB_DEVICE(0x05ac, 0x821f) },
  80
  81         /* Apple MacBookPro8,2 */
  82         { USB_DEVICE(0x05ac, 0x821a) },
  83
  84         /* Apple MacMini5,1 */
  85         { USB_DEVICE(0x05ac, 0x8281) },
  86
  87         /* AVM BlueFRITZ! USB v2.0 */
  88         { USB_DEVICE(0x057c, 0x3800) },
  89
  90         /* Bluetooth Ultraport Module from IBM */
  91         { USB_DEVICE(0x04bf, 0x030a) },
  92
  93         /* ALPS Modules with non-standard id */
  94         { USB_DEVICE(0x044e, 0x3001) },
  95         { USB_DEVICE(0x044e, 0x3002) },
  96
  97         /* Ericsson with non-standard id */
  98         { USB_DEVICE(0x0bdb, 0x1002) },
  99
 100         /* Canyon CN-BTU1 with HID interfaces */
 101         { USB_DEVICE(0x0c10, 0x0000) },
 102
 103         /* Broadcom BCM20702A0 */
 104         { USB_DEVICE(0x0489, 0xe042) },
 105         { USB_DEVICE(0x0a5c, 0x21e1) },
 106         { USB_DEVICE(0x0a5c, 0x21e3) },
 107         { USB_DEVICE(0x0a5c, 0x21e6) },
 108         { USB_DEVICE(0x0a5c, 0x21f3) },
 109         { USB_DEVICE(0x413c, 0x8197) },
 110
 111         { }     /* Terminating entry */
 112 };
 113
 114 MODULE_DEVICE_TABLE(usb, btusb_table);
 115
 116 static struct usb_device_id blacklist_table[] = {
 117         /* CSR BlueCore devices */
 118         { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
 119
 120         /* Broadcom BCM2033 without firmware */
 121         { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
 122
 123         /* Atheros 3011 with sflash firmware */
 124         { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
 125         { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
 126         { USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
 127         { USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
 128
 129         /* Atheros AR9285 Malbec with sflash firmware */
 130         { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
 131
 132         /* Atheros 3012 with sflash firmware */
 133         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
 134         { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
 135
 136         /* Atheros AR5BBU12 with sflash firmware */
 137         { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
 138
 139         /* Broadcom BCM2035 */
 140         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
 141         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
 142         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
 143
 144         /* Broadcom BCM2045 */
 145         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
 146         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
 147
 148         /* IBM/Lenovo ThinkPad with Broadcom chip */
 149         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
 150         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
 151
 152         /* HP laptop with Broadcom chip */
 153         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
 154
 155         /* Dell laptop with Broadcom chip */
 156         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
 157
 158         /* Dell Wireless 370 and 410 devices */
 159         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
 160         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
 161
 162         /* Belkin F8T012 and F8T013 devices */
 163         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
 164         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
 165
 166         /* Asus WL-BTD202 device */
 167         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
 168
 169         /* Kensington Bluetooth USB adapter */
 170         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
 171
 172         /* RTX Telecom based adapters with buggy SCO support */
 173         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
 174         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
 175
 176         /* CONWISE Technology based adapters with buggy SCO support */
 177         { USB_DEVICE(0x0e5e, 0x6622), .driver_info = BTUSB_BROKEN_ISOC },
 178
 179         /* Digianswer devices */
 180         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
 181         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
 182
 183         /* CSR BlueCore Bluetooth Sniffer */
 184         { USB_DEVICE(0x0a12, 0x0002), .driver_info = BTUSB_SNIFFER },
 185
 186         /* Frontline ComProbe Bluetooth Sniffer */
 187         { USB_DEVICE(0x16d3, 0x0002), .driver_info = BTUSB_SNIFFER },
 188
 189         { }     /* Terminating entry */
 190 };
 191
 192 #define BTUSB_MAX_ISOC_FRAMES   10
 193
 194 #define BTUSB_INTR_RUNNING      0
 195 #define BTUSB_BULK_RUNNING      1
 196 #define BTUSB_ISOC_RUNNING      2
 197 #define BTUSB_SUSPENDING        3
 198 #define BTUSB_DID_ISO_RESUME    4
 199
 200 struct btusb_data {
 201         struct hci_dev       *hdev;
 202         struct usb_device    *udev;
 203         struct usb_interface *intf;
 204         struct usb_interface *isoc;
 205
 206         spinlock_t lock;
 207
 208         unsigned long flags;
 209
 210         struct work_struct work;
 211         struct work_struct waker;
 212
 213         struct usb_anchor tx_anchor;
 214         struct usb_anchor intr_anchor;
 215         struct usb_anchor bulk_anchor;
 216         struct usb_anchor isoc_anchor;
 217         struct usb_anchor deferred;
 218         int tx_in_flight;
 219         spinlock_t txlock;
 220
 221         struct usb_endpoint_descriptor *intr_ep;
 222         struct usb_endpoint_descriptor *bulk_tx_ep;
 223         struct usb_endpoint_descriptor *bulk_rx_ep;
 224         struct usb_endpoint_descriptor *isoc_tx_ep;
 225         struct usb_endpoint_descriptor *isoc_rx_ep;
 226
 227         __u8 cmdreq_type;
 228
 229         unsigned int sco_num;
 230         int isoc_altsetting;
 231         int suspend_count;
 232 };
 233
 234 static int inc_tx(struct btusb_data *data)
 235 {
 236         unsigned long flags;
 237         int rv;
 238
 239         spin_lock_irqsave(&data->txlock, flags);
 240         rv = test_bit(BTUSB_SUSPENDING, &data->flags);
 241         if (!rv)
 242                 data->tx_in_flight++;
 243         spin_unlock_irqrestore(&data->txlock, flags);
 244
 245         return rv;
 246 }
 247
 248 static void btusb_intr_complete(struct urb *urb)
 249 {
 250         struct hci_dev *hdev = urb->context;
 251         struct btusb_data *data = hdev->driver_data;
 252         int err;
 253
 254         BT_DBG("%s urb %p status %d count %d", hdev->name,
 255                                         urb, urb->status, urb->actual_length);
 256
 257         if (!test_bit(HCI_RUNNING, &hdev->flags))
 258                 return;
 259
 260         if (urb->status == 0) {
 261                 hdev->stat.byte_rx += urb->actual_length;
 262
 263                 if (hci_recv_fragment(hdev, HCI_EVENT_PKT,
 264                                                 urb->transfer_buffer,
 265                                                 urb->actual_length) < 0) {
 266                         BT_ERR("%s corrupted event packet", hdev->name);
 267                         hdev->stat.err_rx++;
 268                 }
 269         }
 270
 271         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
 272                 return;
 273
 274         usb_mark_last_busy(data->udev);
 275         usb_anchor_urb(urb, &data->intr_anchor);
 276
 277         err = usb_submit_urb(urb, GFP_ATOMIC);
 278         if (err < 0) {
 279                 /* -EPERM: urb is being killed;
 280                  * -ENODEV: device got disconnected */
 281                 if (err != -EPERM && err != -ENODEV)
 282                         BT_ERR("%s urb %p failed to resubmit (%d)",
 283                                                 hdev->name, urb, -err);
 284                 usb_unanchor_urb(urb);
 285         }
 286 }
 287
 288 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
 289 {
 290         struct btusb_data *data = hdev->driver_data;
 291         struct urb *urb;
 292         unsigned char *buf;
 293         unsigned int pipe;
 294         int err, size;
 295
 296         BT_DBG("%s", hdev->name);
 297
 298         if (!data->intr_ep)
 299                 return -ENODEV;
 300
 301         urb = usb_alloc_urb(0, mem_flags);
 302         if (!urb)
 303                 return -ENOMEM;
 304
 305         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
 306
 307         buf = kmalloc(size, mem_flags);
 308         if (!buf) {
 309                 usb_free_urb(urb);
 310                 return -ENOMEM;
 311         }
 312
 313         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
 314
 315         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
 316                                                 btusb_intr_complete, hdev,
 317                                                 data->intr_ep->bInterval);
 318
 319         urb->transfer_flags |= URB_FREE_BUFFER;
 320
 321         usb_anchor_urb(urb, &data->intr_anchor);
 322
 323         err = usb_submit_urb(urb, mem_flags);
 324         if (err < 0) {
 325                 BT_ERR("%s urb %p submission failed (%d)",
 326                                                 hdev->name, urb, -err);
 327                 usb_unanchor_urb(urb);
 328         }
 329
 330         usb_free_urb(urb);
 331
 332         return err;
 333 }
 334
 335 static void btusb_bulk_complete(struct urb *urb)
 336 {
 337         struct hci_dev *hdev = urb->context;
 338         struct btusb_data *data = hdev->driver_data;
 339         int err;
 340
 341         BT_DBG("%s urb %p status %d count %d", hdev->name,
 342                                         urb, urb->status, urb->actual_length);
 343
 344         if (!test_bit(HCI_RUNNING, &hdev->flags))
 345                 return;
 346
 347         if (urb->status == 0) {
 348                 hdev->stat.byte_rx += urb->actual_length;
 349
 350                 if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT,
 351                                                 urb->transfer_buffer,
 352                                                 urb->actual_length) < 0) {
 353                         BT_ERR("%s corrupted ACL packet", hdev->name);
 354                         hdev->stat.err_rx++;
 355                 }
 356         }
 357
 358         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
 359                 return;
 360
 361         usb_anchor_urb(urb, &data->bulk_anchor);
 362         usb_mark_last_busy(data->udev);
 363
 364         err = usb_submit_urb(urb, GFP_ATOMIC);
 365         if (err < 0) {
 366                 /* -EPERM: urb is being killed;
 367                  * -ENODEV: device got disconnected */
 368                 if (err != -EPERM && err != -ENODEV)
 369                         BT_ERR("%s urb %p failed to resubmit (%d)",
 370                                                 hdev->name, urb, -err);
 371                 usb_unanchor_urb(urb);
 372         }
 373 }
 374
 375 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
 376 {
 377         struct btusb_data *data = hdev->driver_data;
 378         struct urb *urb;
 379         unsigned char *buf;
 380         unsigned int pipe;
 381         int err, size = HCI_MAX_FRAME_SIZE;
 382
 383         BT_DBG("%s", hdev->name);
 384
 385         if (!data->bulk_rx_ep)
 386                 return -ENODEV;
 387
 388         urb = usb_alloc_urb(0, mem_flags);
 389         if (!urb)
 390                 return -ENOMEM;
 391
 392         buf = kmalloc(size, mem_flags);
 393         if (!buf) {
 394                 usb_free_urb(urb);
 395                 return -ENOMEM;
 396         }
 397
 398         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
 399
 400         usb_fill_bulk_urb(urb, data->udev, pipe,
 401                                         buf, size, btusb_bulk_complete, hdev);
 402
 403         urb->transfer_flags |= URB_FREE_BUFFER;
 404
 405         usb_mark_last_busy(data->udev);
 406         usb_anchor_urb(urb, &data->bulk_anchor);
 407
 408         err = usb_submit_urb(urb, mem_flags);
 409         if (err < 0) {
 410                 BT_ERR("%s urb %p submission failed (%d)",
 411                                                 hdev->name, urb, -err);
 412                 usb_unanchor_urb(urb);
 413         }
 414
 415         usb_free_urb(urb);
 416
 417         return err;
 418 }
 419
 420 static void btusb_isoc_complete(struct urb *urb)
 421 {
 422         struct hci_dev *hdev = urb->context;
 423         struct btusb_data *data = hdev->driver_data;
 424         int i, err;
 425
 426         BT_DBG("%s urb %p status %d count %d", hdev->name,
 427                                         urb, urb->status, urb->actual_length);
 428
 429         if (!test_bit(HCI_RUNNING, &hdev->flags))
 430                 return;
 431
 432         if (urb->status == 0) {
 433                 for (i = 0; i < urb->number_of_packets; i++) {
 434                         unsigned int offset = urb->iso_frame_desc[i].offset;
 435                         unsigned int length = urb->iso_frame_desc[i].actual_length;
 436
 437                         if (urb->iso_frame_desc[i].status)
 438                                 continue;
 439
 440                         hdev->stat.byte_rx += length;
 441
 442                         if (hci_recv_fragment(hdev, HCI_SCODATA_PKT,
 443                                                 urb->transfer_buffer + offset,
 444                                                                 length) < 0) {
 445                                 BT_ERR("%s corrupted SCO packet", hdev->name);
 446                                 hdev->stat.err_rx++;
 447                         }
 448                 }
 449         }
 450
 451         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
 452                 return;
 453
 454         usb_anchor_urb(urb, &data->isoc_anchor);
 455
 456         err = usb_submit_urb(urb, GFP_ATOMIC);
 457         if (err < 0) {
 458                 /* -EPERM: urb is being killed;
 459                  * -ENODEV: device got disconnected */
 460                 if (err != -EPERM && err != -ENODEV)
 461                         BT_ERR("%s urb %p failed to resubmit (%d)",
 462                                                 hdev->name, urb, -err);
 463                 usb_unanchor_urb(urb);
 464         }
 465 }
 466
 467 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
 468 {
 469         int i, offset = 0;
 470
 471         BT_DBG("len %d mtu %d", len, mtu);
 472
 473         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
 474                                         i++, offset += mtu, len -= mtu) {
 475                 urb->iso_frame_desc[i].offset = offset;
 476                 urb->iso_frame_desc[i].length = mtu;
 477         }
 478
 479         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
 480                 urb->iso_frame_desc[i].offset = offset;
 481                 urb->iso_frame_desc[i].length = len;
 482                 i++;
 483         }
 484
 485         urb->number_of_packets = i;
 486 }
 487
 488 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
 489 {
 490         struct btusb_data *data = hdev->driver_data;
 491         struct urb *urb;
 492         unsigned char *buf;
 493         unsigned int pipe;
 494         int err, size;
 495
 496         BT_DBG("%s", hdev->name);
 497
 498         if (!data->isoc_rx_ep)
 499                 return -ENODEV;
 500
 501         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
 502         if (!urb)
 503                 return -ENOMEM;
 504
 505         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
 506                                                 BTUSB_MAX_ISOC_FRAMES;
 507
 508         buf = kmalloc(size, mem_flags);
 509         if (!buf) {
 510                 usb_free_urb(urb);
 511                 return -ENOMEM;
 512         }
 513
 514         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
 515
 516         usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
 517                                 hdev, data->isoc_rx_ep->bInterval);
 518
 519         urb->transfer_flags  = URB_FREE_BUFFER | URB_ISO_ASAP;
 520
 521         __fill_isoc_descriptor(urb, size,
 522                         le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
 523
 524         usb_anchor_urb(urb, &data->isoc_anchor);
 525
 526         err = usb_submit_urb(urb, mem_flags);
 527         if (err < 0) {
 528                 BT_ERR("%s urb %p submission failed (%d)",
 529                                                 hdev->name, urb, -err);
 530                 usb_unanchor_urb(urb);
 531         }
 532
 533         usb_free_urb(urb);
 534
 535         return err;
 536 }
 537
 538 static void btusb_tx_complete(struct urb *urb)
 539 {
 540         struct sk_buff *skb = urb->context;
 541         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 542         struct btusb_data *data = hdev->driver_data;
 543
 544         BT_DBG("%s urb %p status %d count %d", hdev->name,
 545                                         urb, urb->status, urb->actual_length);
 546
 547         if (!test_bit(HCI_RUNNING, &hdev->flags))
 548                 goto done;
 549
 550         if (!urb->status)
 551                 hdev->stat.byte_tx += urb->transfer_buffer_length;
 552         else
 553                 hdev->stat.err_tx++;
 554
 555 done:
 556         spin_lock(&data->txlock);
 557         data->tx_in_flight--;
 558         spin_unlock(&data->txlock);
 559
 560         kfree(urb->setup_packet);
 561
 562         kfree_skb(skb);
 563 }
 564
 565 static void btusb_isoc_tx_complete(struct urb *urb)
 566 {
 567         struct sk_buff *skb = urb->context;
 568         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 569
 570         BT_DBG("%s urb %p status %d count %d", hdev->name,
 571                                         urb, urb->status, urb->actual_length);
 572
 573         if (!test_bit(HCI_RUNNING, &hdev->flags))
 574                 goto done;
 575
 576         if (!urb->status)
 577                 hdev->stat.byte_tx += urb->transfer_buffer_length;
 578         else
 579                 hdev->stat.err_tx++;
 580
 581 done:
 582         kfree(urb->setup_packet);
 583
 584         kfree_skb(skb);
 585 }
 586
 587 static int btusb_open(struct hci_dev *hdev)
 588 {
 589         struct btusb_data *data = hdev->driver_data;
 590         int err;
 591
 592         BT_DBG("%s", hdev->name);
 593
 594         err = usb_autopm_get_interface(data->intf);
 595         if (err < 0)
 596                 return err;
 597
 598         data->intf->needs_remote_wakeup = 1;
 599
 600         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
 601                 goto done;
 602
 603         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
 604                 goto done;
 605
 606         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
 607         if (err < 0)
 608                 goto failed;
 609
 610         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
 611         if (err < 0) {
 612                 usb_kill_anchored_urbs(&data->intr_anchor);
 613                 goto failed;
 614         }
 615
 616         set_bit(BTUSB_BULK_RUNNING, &data->flags);
 617         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
 618
 619 done:
 620         usb_autopm_put_interface(data->intf);
 621         return 0;
 622
 623 failed:
 624         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
 625         clear_bit(HCI_RUNNING, &hdev->flags);
 626         usb_autopm_put_interface(data->intf);
 627         return err;
 628 }
 629
 630 static void btusb_stop_traffic(struct btusb_data *data)
 631 {
 632         usb_kill_anchored_urbs(&data->intr_anchor);
 633         usb_kill_anchored_urbs(&data->bulk_anchor);
 634         usb_kill_anchored_urbs(&data->isoc_anchor);
 635 }
 636
 637 static int btusb_close(struct hci_dev *hdev)
 638 {
 639         struct btusb_data *data = hdev->driver_data;
 640         int err;
 641
 642         BT_DBG("%s", hdev->name);
 643
 644         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 645                 return 0;
 646
 647         cancel_work_sync(&data->work);
 648         cancel_work_sync(&data->waker);
 649
 650         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 651         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
 652         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
 653
 654         btusb_stop_traffic(data);
 655         err = usb_autopm_get_interface(data->intf);
 656         if (err < 0)
 657                 goto failed;
 658
 659         data->intf->needs_remote_wakeup = 0;
 660         usb_autopm_put_interface(data->intf);
 661
 662 failed:
 663         usb_scuttle_anchored_urbs(&data->deferred);
 664         return 0;
 665 }
 666
 667 static int btusb_flush(struct hci_dev *hdev)
 668 {
 669         struct btusb_data *data = hdev->driver_data;
 670
 671         BT_DBG("%s", hdev->name);
 672
 673         usb_kill_anchored_urbs(&data->tx_anchor);
 674
 675         return 0;
 676 }
 677
 678 static int btusb_send_frame(struct sk_buff *skb)
 679 {
 680         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 681         struct btusb_data *data = hdev->driver_data;
 682         struct usb_ctrlrequest *dr;
 683         struct urb *urb;
 684         unsigned int pipe;
 685         int err;
 686
 687         BT_DBG("%s", hdev->name);
 688
 689         if (!test_bit(HCI_RUNNING, &hdev->flags))
 690                 return -EBUSY;
 691
 692         switch (bt_cb(skb)->pkt_type) {
 693         case HCI_COMMAND_PKT:
 694                 urb = usb_alloc_urb(0, GFP_ATOMIC);
 695                 if (!urb)
 696                         return -ENOMEM;
 697
 698                 dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
 699                 if (!dr) {
 700                         usb_free_urb(urb);
 701                         return -ENOMEM;
 702                 }
 703
 704                 dr->bRequestType = data->cmdreq_type;
 705                 dr->bRequest     = 0;
 706                 dr->wIndex       = 0;
 707                 dr->wValue       = 0;
 708                 dr->wLength      = __cpu_to_le16(skb->len);
 709
 710                 pipe = usb_sndctrlpipe(data->udev, 0x00);
 711
 712                 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
 713                                 skb->data, skb->len, btusb_tx_complete, skb);
 714
 715                 hdev->stat.cmd_tx++;
 716                 break;
 717
 718         case HCI_ACLDATA_PKT:
 719                 if (!data->bulk_tx_ep)
 720                         return -ENODEV;
 721
 722                 urb = usb_alloc_urb(0, GFP_ATOMIC);
 723                 if (!urb)
 724                         return -ENOMEM;
 725
 726                 pipe = usb_sndbulkpipe(data->udev,
 727                                         data->bulk_tx_ep->bEndpointAddress);
 728
 729                 usb_fill_bulk_urb(urb, data->udev, pipe,
 730                                 skb->data, skb->len, btusb_tx_complete, skb);
 731
 732                 hdev->stat.acl_tx++;
 733                 break;
 734
 735         case HCI_SCODATA_PKT:
 736                 if (!data->isoc_tx_ep || hdev->conn_hash.sco_num < 1)
 737                         return -ENODEV;
 738
 739                 urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_ATOMIC);
 740                 if (!urb)
 741                         return -ENOMEM;
 742
 743                 pipe = usb_sndisocpipe(data->udev,
 744                                         data->isoc_tx_ep->bEndpointAddress);
 745
 746                 usb_fill_int_urb(urb, data->udev, pipe,
 747                                 skb->data, skb->len, btusb_isoc_tx_complete,
 748                                 skb, data->isoc_tx_ep->bInterval);
 749
 750                 urb->transfer_flags  = URB_ISO_ASAP;
 751
 752                 __fill_isoc_descriptor(urb, skb->len,
 753                                 le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
 754
 755                 hdev->stat.sco_tx++;
 756                 goto skip_waking;
 757
 758         default:
 759                 return -EILSEQ;
 760         }
 761
 762         err = inc_tx(data);
 763         if (err) {
 764                 usb_anchor_urb(urb, &data->deferred);
 765                 schedule_work(&data->waker);
 766                 err = 0;
 767                 goto done;
 768         }
 769
 770 skip_waking:
 771         usb_anchor_urb(urb, &data->tx_anchor);
 772
 773         err = usb_submit_urb(urb, GFP_ATOMIC);
 774         if (err < 0) {
 775                 BT_ERR("%s urb %p submission failed", hdev->name, urb);
 776                 kfree(urb->setup_packet);
 777                 usb_unanchor_urb(urb);
 778         } else {
 779                 usb_mark_last_busy(data->udev);
 780         }
 781
 782 done:
 783         usb_free_urb(urb);
 784         return err;
 785 }
 786
 787 static void btusb_destruct(struct hci_dev *hdev)
 788 {
 789         struct btusb_data *data = hdev->driver_data;
 790
 791         BT_DBG("%s", hdev->name);
 792
 793         kfree(data);
 794 }
 795
 796 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
 797 {
 798         struct btusb_data *data = hdev->driver_data;
 799
 800         BT_DBG("%s evt %d", hdev->name, evt);
 801
 802         if (hdev->conn_hash.sco_num != data->sco_num) {
 803                 data->sco_num = hdev->conn_hash.sco_num;
 804                 schedule_work(&data->work);
 805         }
 806 }
 807
 808 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
 809 {
 810         struct btusb_data *data = hdev->driver_data;
 811         struct usb_interface *intf = data->isoc;
 812         struct usb_endpoint_descriptor *ep_desc;
 813         int i, err;
 814
 815         if (!data->isoc)
 816                 return -ENODEV;
 817
 818         err = usb_set_interface(data->udev, 1, altsetting);
 819         if (err < 0) {
 820                 BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
 821                 return err;
 822         }
 823
 824         data->isoc_altsetting = altsetting;
 825
 826         data->isoc_tx_ep = NULL;
 827         data->isoc_rx_ep = NULL;
 828
 829         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
 830                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
 831
 832                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
 833                         data->isoc_tx_ep = ep_desc;
 834                         continue;
 835                 }
 836
 837                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
 838                         data->isoc_rx_ep = ep_desc;
 839                         continue;
 840                 }
 841         }
 842
 843         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
 844                 BT_ERR("%s invalid SCO descriptors", hdev->name);
 845                 return -ENODEV;
 846         }
 847
 848         return 0;
 849 }
 850
 851 static void btusb_work(struct work_struct *work)
 852 {
 853         struct btusb_data *data = container_of(work, struct btusb_data, work);
 854         struct hci_dev *hdev = data->hdev;
 855         int err;
 856
 857         if (hdev->conn_hash.sco_num > 0) {
 858                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
 859                         err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
 860                         if (err < 0) {
 861                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 862                                 usb_kill_anchored_urbs(&data->isoc_anchor);
 863                                 return;
 864                         }
 865
 866                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
 867                 }
 868                 if (data->isoc_altsetting != 2) {
 869                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 870                         usb_kill_anchored_urbs(&data->isoc_anchor);
 871
 872                         if (__set_isoc_interface(hdev, 2) < 0)
 873                                 return;
 874                 }
 875
 876                 if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
 877                         if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
 878                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 879                         else
 880                                 btusb_submit_isoc_urb(hdev, GFP_KERNEL);
 881                 }
 882         } else {
 883                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 884                 usb_kill_anchored_urbs(&data->isoc_anchor);
 885
 886                 __set_isoc_interface(hdev, 0);
 887                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
 888                         usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
 889         }
 890 }
 891
 892 static void btusb_waker(struct work_struct *work)
 893 {
 894         struct btusb_data *data = container_of(work, struct btusb_data, waker);
 895         int err;
 896
 897         err = usb_autopm_get_interface(data->intf);
 898         if (err < 0)
 899                 return;
 900
 901         usb_autopm_put_interface(data->intf);
 902 }
 903
 904 static int btusb_probe(struct usb_interface *intf,
 905                                 const struct usb_device_id *id)
 906 {
 907         struct usb_endpoint_descriptor *ep_desc;
 908         struct btusb_data *data;
 909         struct hci_dev *hdev;
 910         int i, err;
 911
 912         BT_DBG("intf %p id %p", intf, id);
 913
 914         /* interface numbers are hardcoded in the spec */
 915         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 916                 return -ENODEV;
 917
 918         if (!id->driver_info) {
 919                 const struct usb_device_id *match;
 920                 match = usb_match_id(intf, blacklist_table);
 921                 if (match)
 922                         id = match;
 923         }
 924
 925         if (id->driver_info == BTUSB_IGNORE)
 926                 return -ENODEV;
 927
 928         if (ignore_dga && id->driver_info & BTUSB_DIGIANSWER)
 929                 return -ENODEV;
 930
 931         if (ignore_csr && id->driver_info & BTUSB_CSR)
 932                 return -ENODEV;
 933
 934         if (ignore_sniffer && id->driver_info & BTUSB_SNIFFER)
 935                 return -ENODEV;
 936
 937         if (id->driver_info & BTUSB_ATH3012) {
 938                 struct usb_device *udev = interface_to_usbdev(intf);
 939
 940                 /* Old firmware would otherwise let ath3k driver load
 941                  * patch and sysconfig files */
 942                 if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001)
 943                         return -ENODEV;
 944         }
 945
 946         data = kzalloc(sizeof(*data), GFP_KERNEL);
 947         if (!data)
 948                 return -ENOMEM;
 949
 950         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
 951                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
 952
 953                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
 954                         data->intr_ep = ep_desc;
 955                         continue;
 956                 }
 957
 958                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
 959                         data->bulk_tx_ep = ep_desc;
 960                         continue;
 961                 }
 962
 963                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
 964                         data->bulk_rx_ep = ep_desc;
 965                         continue;
 966                 }
 967         }
 968
 969         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep) {
 970                 kfree(data);
 971                 return -ENODEV;
 972         }
 973
 974         data->cmdreq_type = USB_TYPE_CLASS;
 975
 976         data->udev = interface_to_usbdev(intf);
 977         data->intf = intf;
 978
 979         spin_lock_init(&data->lock);
 980
 981         INIT_WORK(&data->work, btusb_work);
 982         INIT_WORK(&data->waker, btusb_waker);
 983         spin_lock_init(&data->txlock);
 984
 985         init_usb_anchor(&data->tx_anchor);
 986         init_usb_anchor(&data->intr_anchor);
 987         init_usb_anchor(&data->bulk_anchor);
 988         init_usb_anchor(&data->isoc_anchor);
 989         init_usb_anchor(&data->deferred);
 990
 991         hdev = hci_alloc_dev();
 992         if (!hdev) {
 993                 kfree(data);
 994                 return -ENOMEM;
 995         }
 996
 997         hdev->bus = HCI_USB;
 998         hdev->driver_data = data;
 999
1000         data->hdev = hdev;
1001
1002         SET_HCIDEV_DEV(hdev, &intf->dev);
1003
1004         hdev->open     = btusb_open;
1005         hdev->close    = btusb_close;
1006         hdev->flush    = btusb_flush;
1007         hdev->send     = btusb_send_frame;
1008         hdev->destruct = btusb_destruct;
1009         hdev->notify   = btusb_notify;
1010
1011         hdev->owner = THIS_MODULE;
1012
1013         /* Interface numbers are hardcoded in the specification */
1014         data->isoc = usb_ifnum_to_if(data->udev, 1);
1015
1016         if (!reset)
1017                 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
1018
1019         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
1020                 if (!disable_scofix)
1021                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
1022         }
1023
1024         if (id->driver_info & BTUSB_BROKEN_ISOC)
1025                 data->isoc = NULL;
1026
1027         if (id->driver_info & BTUSB_DIGIANSWER) {
1028                 data->cmdreq_type = USB_TYPE_VENDOR;
1029                 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
1030         }
1031
1032         if (id->driver_info & BTUSB_CSR) {
1033                 struct usb_device *udev = data->udev;
1034
1035                 /* Old firmware would otherwise execute USB reset */
1036                 if (le16_to_cpu(udev->descriptor.bcdDevice) < 0x117)
1037                         set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
1038         }
1039
1040         if (id->driver_info & BTUSB_SNIFFER) {
1041                 struct usb_device *udev = data->udev;
1042
1043                 /* New sniffer firmware has crippled HCI interface */
1044                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
1045                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
1046
1047                 data->isoc = NULL;
1048         }
1049
1050         if (id->driver_info & BTUSB_BCM92035) {
1051                 unsigned char cmd[] = { 0x3b, 0xfc, 0x01, 0x00 };
1052                 struct sk_buff *skb;
1053
1054                 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
1055                 if (skb) {
1056                         memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));
1057                         skb_queue_tail(&hdev->driver_init, skb);
1058                 }
1059         }
1060
1061         if (data->isoc) {
1062                 err = usb_driver_claim_interface(&btusb_driver,
1063                                                         data->isoc, data);
1064                 if (err < 0) {
1065                         hci_free_dev(hdev);
1066                         kfree(data);
1067                         return err;
1068                 }
1069         }
1070
1071         err = hci_register_dev(hdev);
1072         if (err < 0) {
1073                 hci_free_dev(hdev);
1074                 kfree(data);
1075                 return err;
1076         }
1077
1078         usb_set_intfdata(intf, data);
1079
1080         return 0;
1081 }
1082
1083 static void btusb_disconnect(struct usb_interface *intf)
1084 {
1085         struct btusb_data *data = usb_get_intfdata(intf);
1086         struct hci_dev *hdev;
1087
1088         BT_DBG("intf %p", intf);
1089
1090         if (!data)
1091                 return;
1092
1093         hdev = data->hdev;
1094
1095         __hci_dev_hold(hdev);
1096
1097         usb_set_intfdata(data->intf, NULL);
1098
1099         if (data->isoc)
1100                 usb_set_intfdata(data->isoc, NULL);
1101
1102         hci_unregister_dev(hdev);
1103
1104         if (intf == data->isoc)
1105                 usb_driver_release_interface(&btusb_driver, data->intf);
1106         else if (data->isoc)
1107                 usb_driver_release_interface(&btusb_driver, data->isoc);
1108
1109         __hci_dev_put(hdev);
1110
1111         hci_free_dev(hdev);
1112 }
1113
1114 #ifdef CONFIG_PM
1115 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
1116 {
1117         struct btusb_data *data = usb_get_intfdata(intf);
1118
1119         BT_DBG("intf %p", intf);
1120
1121         if (data->suspend_count++)
1122                 return 0;
1123
1124         spin_lock_irq(&data->txlock);
1125         if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
1126                 set_bit(BTUSB_SUSPENDING, &data->flags);
1127                 spin_unlock_irq(&data->txlock);
1128         } else {
1129                 spin_unlock_irq(&data->txlock);
1130                 data->suspend_count--;
1131                 return -EBUSY;
1132         }
1133
1134         cancel_work_sync(&data->work);
1135
1136         btusb_stop_traffic(data);
1137         usb_kill_anchored_urbs(&data->tx_anchor);
1138
1139         return 0;
1140 }
1141
1142 static void play_deferred(struct btusb_data *data)
1143 {
1144         struct urb *urb;
1145         int err;
1146
1147         while ((urb = usb_get_from_anchor(&data->deferred))) {
1148                 err = usb_submit_urb(urb, GFP_ATOMIC);
1149                 if (err < 0)
1150                         break;
1151
1152                 data->tx_in_flight++;
1153         }
1154         usb_scuttle_anchored_urbs(&data->deferred);
1155 }
1156
1157 static int btusb_resume(struct usb_interface *intf)
1158 {
1159         struct btusb_data *data = usb_get_intfdata(intf);
1160         struct hci_dev *hdev = data->hdev;
1161         int err = 0;
1162
1163         BT_DBG("intf %p", intf);
1164
1165         if (--data->suspend_count)
1166                 return 0;
1167
1168         if (!test_bit(HCI_RUNNING, &hdev->flags))
1169                 goto done;
1170
1171         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
1172                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
1173                 if (err < 0) {
1174                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1175                         goto failed;
1176                 }
1177         }
1178
1179         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
1180                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
1181                 if (err < 0) {
1182                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1183                         goto failed;
1184                 }
1185
1186                 btusb_submit_bulk_urb(hdev, GFP_NOIO);
1187         }
1188
1189         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1190                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
1191                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1192                 else
1193                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
1194         }
1195
1196         spin_lock_irq(&data->txlock);
1197         play_deferred(data);
1198         clear_bit(BTUSB_SUSPENDING, &data->flags);
1199         spin_unlock_irq(&data->txlock);
1200         schedule_work(&data->work);
1201
1202         return 0;
1203
1204 failed:
1205         usb_scuttle_anchored_urbs(&data->deferred);
1206 done:
1207         spin_lock_irq(&data->txlock);
1208         clear_bit(BTUSB_SUSPENDING, &data->flags);
1209         spin_unlock_irq(&data->txlock);
1210
1211         return err;
1212 }
1213 #endif
1214
1215 static struct usb_driver btusb_driver = {
1216         .name           = "btusb",
1217         .probe          = btusb_probe,
1218         .disconnect     = btusb_disconnect,
1219 #ifdef CONFIG_PM
1220         .suspend        = btusb_suspend,
1221         .resume         = btusb_resume,
1222 #endif
1223         .id_table       = btusb_table,
1224         .supports_autosuspend = 1,
1225 };
1226
1227 static int __init btusb_init(void)
1228 {
1229         BT_INFO("Generic Bluetooth USB driver ver %s", VERSION);
1230
1231         return usb_register(&btusb_driver);
1232 }
1233
1234 static void __exit btusb_exit(void)
1235 {
1236         usb_deregister(&btusb_driver);
1237 }
1238
1239 module_init(btusb_init);
1240 module_exit(btusb_exit);
1241
1242 module_param(ignore_dga, bool, 0644);
1243 MODULE_PARM_DESC(ignore_dga, "Ignore devices with id 08fd:0001");
1244
1245 module_param(ignore_csr, bool, 0644);
1246 MODULE_PARM_DESC(ignore_csr, "Ignore devices with id 0a12:0001");
1247
1248 module_param(ignore_sniffer, bool, 0644);
1249 MODULE_PARM_DESC(ignore_sniffer, "Ignore devices with id 0a12:0002");
1250
1251 module_param(disable_scofix, bool, 0644);
1252 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
1253
1254 module_param(force_scofix, bool, 0644);
1255 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
1256
1257 module_param(reset, bool, 0644);
1258 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
1259
1260 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
1261 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
1262 MODULE_VERSION(VERSION);
1263 MODULE_LICENSE("GPL");