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