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