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