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