drivers/bluetooth/btusb.c

   1 /*
   2  *
   3  *  Generic Bluetooth USB driver
   4  *
   5  *  Copyright (C) 2005-2008  Marcel Holtmann <marcel@holtmann.org>
   6  *
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 #include <linux/kernel.h>
  25 #include <linux/module.h>
  26 #include <linux/init.h>
  27 #include <linux/slab.h>
  28 #include <linux/types.h>
  29 #include <linux/sched.h>
  30 #include <linux/errno.h>
  31 #include <linux/skbuff.h>
  32
  33 #include <linux/usb.h>
  34
  35 #include <net/bluetooth/bluetooth.h>
  36 #include <net/bluetooth/hci_core.h>
  37
  38 #define VERSION "0.6"
  39
  40 static int ignore_dga;
  41 static int ignore_csr;
  42 static int ignore_sniffer;
  43 static int disable_scofix;
  44 static int force_scofix;
  45
  46 static int reset = 1;
  47
  48 static struct usb_driver btusb_driver;
  49
  50 #define BTUSB_IGNORE            0x01
  51 #define BTUSB_DIGIANSWER        0x02
  52 #define BTUSB_CSR               0x04
  53 #define BTUSB_SNIFFER           0x08
  54 #define BTUSB_BCM92035          0x10
  55 #define BTUSB_BROKEN_ISOC       0x20
  56 #define BTUSB_WRONG_SCO_MTU     0x40
  57 #define BTUSB_ATH3012           0x80
  58
  59 static struct usb_device_id btusb_table[] = {
  60         /* Generic Bluetooth USB device */
  61         { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
  62
  63         /* Apple MacBookPro 7,1 */
  64         { USB_DEVICE(0x05ac, 0x8213) },
  65
  66         /* Apple iMac11,1 */
  67         { USB_DEVICE(0x05ac, 0x8215) },
  68
  69         /* Apple MacBookPro6,2 */
  70         { USB_DEVICE(0x05ac, 0x8218) },
  71
  72         /* Apple MacBookAir3,1, MacBookAir3,2 */
  73         { USB_DEVICE(0x05ac, 0x821b) },
  74
  75         /* Apple MacBookPro8,2 */
  76         { USB_DEVICE(0x05ac, 0x821a) },
  77
  78         /* AVM BlueFRITZ! USB v2.0 */
  79         { USB_DEVICE(0x057c, 0x3800) },
  80
  81         /* Bluetooth Ultraport Module from IBM */
  82         { USB_DEVICE(0x04bf, 0x030a) },
  83
  84         /* ALPS Modules with non-standard id */
  85         { USB_DEVICE(0x044e, 0x3001) },
  86         { USB_DEVICE(0x044e, 0x3002) },
  87
  88         /* Ericsson with non-standard id */
  89         { USB_DEVICE(0x0bdb, 0x1002) },
  90
  91         /* Canyon CN-BTU1 with HID interfaces */
  92         { USB_DEVICE(0x0c10, 0x0000) },
  93
  94         { }     /* Terminating entry */
  95 };
  96
  97 MODULE_DEVICE_TABLE(usb, btusb_table);
  98
  99 static struct usb_device_id blacklist_table[] = {
 100         /* CSR BlueCore devices */
 101         { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
 102
 103         /* Broadcom BCM2033 without firmware */
 104         { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
 105
 106         /* Atheros 3011 with sflash firmware */
 107         { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
 108         { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
 109
 110         /* Atheros AR9285 Malbec with sflash firmware */
 111         { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
 112
 113         /* Atheros 3012 with sflash firmware */
 114         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
 115
 116         /* Atheros AR5BBU12 with sflash firmware */
 117         { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
 118
 119         /* Broadcom BCM2035 */
 120         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
 121         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
 122         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
 123
 124         /* Broadcom BCM2045 */
 125         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
 126         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
 127
 128         /* IBM/Lenovo ThinkPad with Broadcom chip */
 129         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
 130         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
 131
 132         /* HP laptop with Broadcom chip */
 133         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
 134
 135         /* Dell laptop with Broadcom chip */
 136         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
 137
 138         /* Dell Wireless 370 and 410 devices */
 139         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
 140         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
 141
 142         /* Belkin F8T012 and F8T013 devices */
 143         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
 144         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
 145
 146         /* Asus WL-BTD202 device */
 147         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
 148
 149         /* Kensington Bluetooth USB adapter */
 150         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
 151
 152         /* RTX Telecom based adapters with buggy SCO support */
 153         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
 154         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
 155
 156         /* CONWISE Technology based adapters with buggy SCO support */
 157         { USB_DEVICE(0x0e5e, 0x6622), .driver_info = BTUSB_BROKEN_ISOC },
 158
 159         /* Digianswer devices */
 160         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
 161         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
 162
 163         /* CSR BlueCore Bluetooth Sniffer */
 164         { USB_DEVICE(0x0a12, 0x0002), .driver_info = BTUSB_SNIFFER },
 165
 166         /* Frontline ComProbe Bluetooth Sniffer */
 167         { USB_DEVICE(0x16d3, 0x0002), .driver_info = BTUSB_SNIFFER },
 168
 169         { }     /* Terminating entry */
 170 };
 171
 172 #define BTUSB_MAX_ISOC_FRAMES   10
 173
 174 #define BTUSB_INTR_RUNNING      0
 175 #define BTUSB_BULK_RUNNING      1
 176 #define BTUSB_ISOC_RUNNING      2
 177 #define BTUSB_SUSPENDING        3
 178 #define BTUSB_DID_ISO_RESUME    4
 179
 180 struct btusb_data {
 181         struct hci_dev       *hdev;
 182         struct usb_device    *udev;
 183         struct usb_interface *intf;
 184         struct usb_interface *isoc;
 185
 186         spinlock_t lock;
 187
 188         unsigned long flags;
 189
 190         struct work_struct work;
 191         struct work_struct waker;
 192
 193         struct usb_anchor tx_anchor;
 194         struct usb_anchor intr_anchor;
 195         struct usb_anchor bulk_anchor;
 196         struct usb_anchor isoc_anchor;
 197         struct usb_anchor deferred;
 198         int tx_in_flight;
 199         spinlock_t txlock;
 200
 201         struct usb_endpoint_descriptor *intr_ep;
 202         struct usb_endpoint_descriptor *bulk_tx_ep;
 203         struct usb_endpoint_descriptor *bulk_rx_ep;
 204         struct usb_endpoint_descriptor *isoc_tx_ep;
 205         struct usb_endpoint_descriptor *isoc_rx_ep;
 206
 207         __u8 cmdreq_type;
 208
 209         unsigned int sco_num;
 210         int isoc_altsetting;
 211         int suspend_count;
 212 };
 213
 214 static int inc_tx(struct btusb_data *data)
 215 {
 216         unsigned long flags;
 217         int rv;
 218
 219         spin_lock_irqsave(&data->txlock, flags);
 220         rv = test_bit(BTUSB_SUSPENDING, &data->flags);
 221         if (!rv)
 222                 data->tx_in_flight++;
 223         spin_unlock_irqrestore(&data->txlock, flags);
 224
 225         return rv;
 226 }
 227
 228 static void btusb_intr_complete(struct urb *urb)
 229 {
 230         struct hci_dev *hdev = urb->context;
 231         struct btusb_data *data = hdev->driver_data;
 232         int err;
 233
 234         BT_DBG("%s urb %p status %d count %d", hdev->name,
 235                                         urb, urb->status, urb->actual_length);
 236
 237         if (!test_bit(HCI_RUNNING, &hdev->flags))
 238                 return;
 239
 240         if (urb->status == 0) {
 241                 hdev->stat.byte_rx += urb->actual_length;
 242
 243                 if (hci_recv_fragment(hdev, HCI_EVENT_PKT,
 244                                                 urb->transfer_buffer,
 245                                                 urb->actual_length) < 0) {
 246                         BT_ERR("%s corrupted event packet", hdev->name);
 247                         hdev->stat.err_rx++;
 248                 }
 249         }
 250
 251         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
 252                 return;
 253
 254         usb_mark_last_busy(data->udev);
 255         usb_anchor_urb(urb, &data->intr_anchor);
 256
 257         err = usb_submit_urb(urb, GFP_ATOMIC);
 258         if (err < 0) {
 259                 if (err != -EPERM)
 260                         BT_ERR("%s urb %p failed to resubmit (%d)",
 261                                                 hdev->name, urb, -err);
 262                 usb_unanchor_urb(urb);
 263         }
 264 }
 265
 266 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
 267 {
 268         struct btusb_data *data = hdev->driver_data;
 269         struct urb *urb;
 270         unsigned char *buf;
 271         unsigned int pipe;
 272         int err, size;
 273
 274         BT_DBG("%s", hdev->name);
 275
 276         if (!data->intr_ep)
 277                 return -ENODEV;
 278
 279         urb = usb_alloc_urb(0, mem_flags);
 280         if (!urb)
 281                 return -ENOMEM;
 282
 283         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
 284
 285         buf = kmalloc(size, mem_flags);
 286         if (!buf) {
 287                 usb_free_urb(urb);
 288                 return -ENOMEM;
 289         }
 290
 291         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
 292
 293         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
 294                                                 btusb_intr_complete, hdev,
 295                                                 data->intr_ep->bInterval);
 296
 297         urb->transfer_flags |= URB_FREE_BUFFER;
 298
 299         usb_anchor_urb(urb, &data->intr_anchor);
 300
 301         err = usb_submit_urb(urb, mem_flags);
 302         if (err < 0) {
 303                 BT_ERR("%s urb %p submission failed (%d)",
 304                                                 hdev->name, urb, -err);
 305                 usb_unanchor_urb(urb);
 306         }
 307
 308         usb_free_urb(urb);
 309
 310         return err;
 311 }
 312
 313 static void btusb_bulk_complete(struct urb *urb)
 314 {
 315         struct hci_dev *hdev = urb->context;
 316         struct btusb_data *data = hdev->driver_data;
 317         int err;
 318
 319         BT_DBG("%s urb %p status %d count %d", hdev->name,
 320                                         urb, urb->status, urb->actual_length);
 321
 322         if (!test_bit(HCI_RUNNING, &hdev->flags))
 323                 return;
 324
 325         if (urb->status == 0) {
 326                 hdev->stat.byte_rx += urb->actual_length;
 327
 328                 if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT,
 329                                                 urb->transfer_buffer,
 330                                                 urb->actual_length) < 0) {
 331                         BT_ERR("%s corrupted ACL packet", hdev->name);
 332                         hdev->stat.err_rx++;
 333                 }
 334         }
 335
 336         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
 337                 return;
 338
 339         usb_anchor_urb(urb, &data->bulk_anchor);
 340         usb_mark_last_busy(data->udev);
 341
 342         err = usb_submit_urb(urb, GFP_ATOMIC);
 343         if (err < 0) {
 344                 if (err != -EPERM)
 345                         BT_ERR("%s urb %p failed to resubmit (%d)",
 346                                                 hdev->name, urb, -err);
 347                 usb_unanchor_urb(urb);
 348         }
 349 }
 350
 351 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
 352 {
 353         struct btusb_data *data = hdev->driver_data;
 354         struct urb *urb;
 355         unsigned char *buf;
 356         unsigned int pipe;
 357         int err, size = HCI_MAX_FRAME_SIZE;
 358
 359         BT_DBG("%s", hdev->name);
 360
 361         if (!data->bulk_rx_ep)
 362                 return -ENODEV;
 363
 364         urb = usb_alloc_urb(0, mem_flags);
 365         if (!urb)
 366                 return -ENOMEM;
 367
 368         buf = kmalloc(size, mem_flags);
 369         if (!buf) {
 370                 usb_free_urb(urb);
 371                 return -ENOMEM;
 372         }
 373
 374         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
 375
 376         usb_fill_bulk_urb(urb, data->udev, pipe,
 377                                         buf, size, btusb_bulk_complete, hdev);
 378
 379         urb->transfer_flags |= URB_FREE_BUFFER;
 380
 381         usb_mark_last_busy(data->udev);
 382         usb_anchor_urb(urb, &data->bulk_anchor);
 383
 384         err = usb_submit_urb(urb, mem_flags);
 385         if (err < 0) {
 386                 BT_ERR("%s urb %p submission failed (%d)",
 387                                                 hdev->name, urb, -err);
 388                 usb_unanchor_urb(urb);
 389         }
 390
 391         usb_free_urb(urb);
 392
 393         return err;
 394 }
 395
 396 static void btusb_isoc_complete(struct urb *urb)
 397 {
 398         struct hci_dev *hdev = urb->context;
 399         struct btusb_data *data = hdev->driver_data;
 400         int i, err;
 401
 402         BT_DBG("%s urb %p status %d count %d", hdev->name,
 403                                         urb, urb->status, urb->actual_length);
 404
 405         if (!test_bit(HCI_RUNNING, &hdev->flags))
 406                 return;
 407
 408         if (urb->status == 0) {
 409                 for (i = 0; i < urb->number_of_packets; i++) {
 410                         unsigned int offset = urb->iso_frame_desc[i].offset;
 411                         unsigned int length = urb->iso_frame_desc[i].actual_length;
 412
 413                         if (urb->iso_frame_desc[i].status)
 414                                 continue;
 415
 416                         hdev->stat.byte_rx += length;
 417
 418                         if (hci_recv_fragment(hdev, HCI_SCODATA_PKT,
 419                                                 urb->transfer_buffer + offset,
 420                                                                 length) < 0) {
 421                                 BT_ERR("%s corrupted SCO packet", hdev->name);
 422                                 hdev->stat.err_rx++;
 423                         }
 424                 }
 425         }
 426
 427         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
 428                 return;
 429
 430         usb_anchor_urb(urb, &data->isoc_anchor);
 431
 432         err = usb_submit_urb(urb, GFP_ATOMIC);
 433         if (err < 0) {
 434                 if (err != -EPERM)
 435                         BT_ERR("%s urb %p failed to resubmit (%d)",
 436                                                 hdev->name, urb, -err);
 437                 usb_unanchor_urb(urb);
 438         }
 439 }
 440
 441 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
 442 {
 443         int i, offset = 0;
 444
 445         BT_DBG("len %d mtu %d", len, mtu);
 446
 447         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
 448                                         i++, offset += mtu, len -= mtu) {
 449                 urb->iso_frame_desc[i].offset = offset;
 450                 urb->iso_frame_desc[i].length = mtu;
 451         }
 452
 453         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
 454                 urb->iso_frame_desc[i].offset = offset;
 455                 urb->iso_frame_desc[i].length = len;
 456                 i++;
 457         }
 458
 459         urb->number_of_packets = i;
 460 }
 461
 462 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
 463 {
 464         struct btusb_data *data = hdev->driver_data;
 465         struct urb *urb;
 466         unsigned char *buf;
 467         unsigned int pipe;
 468         int err, size;
 469
 470         BT_DBG("%s", hdev->name);
 471
 472         if (!data->isoc_rx_ep)
 473                 return -ENODEV;
 474
 475         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
 476         if (!urb)
 477                 return -ENOMEM;
 478
 479         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
 480                                                 BTUSB_MAX_ISOC_FRAMES;
 481
 482         buf = kmalloc(size, mem_flags);
 483         if (!buf) {
 484                 usb_free_urb(urb);
 485                 return -ENOMEM;
 486         }
 487
 488         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
 489
 490         urb->dev      = data->udev;
 491         urb->pipe     = pipe;
 492         urb->context  = hdev;
 493         urb->complete = btusb_isoc_complete;
 494         urb->interval = data->isoc_rx_ep->bInterval;
 495
 496         urb->transfer_flags  = URB_FREE_BUFFER | URB_ISO_ASAP;
 497         urb->transfer_buffer = buf;
 498         urb->transfer_buffer_length = size;
 499
 500         __fill_isoc_descriptor(urb, size,
 501                         le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
 502
 503         usb_anchor_urb(urb, &data->isoc_anchor);
 504
 505         err = usb_submit_urb(urb, mem_flags);
 506         if (err < 0) {
 507                 BT_ERR("%s urb %p submission failed (%d)",
 508                                                 hdev->name, urb, -err);
 509                 usb_unanchor_urb(urb);
 510         }
 511
 512         usb_free_urb(urb);
 513
 514         return err;
 515 }
 516
 517 static void btusb_tx_complete(struct urb *urb)
 518 {
 519         struct sk_buff *skb = urb->context;
 520         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 521         struct btusb_data *data = hdev->driver_data;
 522
 523         BT_DBG("%s urb %p status %d count %d", hdev->name,
 524                                         urb, urb->status, urb->actual_length);
 525
 526         if (!test_bit(HCI_RUNNING, &hdev->flags))
 527                 goto done;
 528
 529         if (!urb->status)
 530                 hdev->stat.byte_tx += urb->transfer_buffer_length;
 531         else
 532                 hdev->stat.err_tx++;
 533
 534 done:
 535         spin_lock(&data->txlock);
 536         data->tx_in_flight--;
 537         spin_unlock(&data->txlock);
 538
 539         kfree(urb->setup_packet);
 540
 541         kfree_skb(skb);
 542 }
 543
 544 static void btusb_isoc_tx_complete(struct urb *urb)
 545 {
 546         struct sk_buff *skb = urb->context;
 547         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 548
 549         BT_DBG("%s urb %p status %d count %d", hdev->name,
 550                                         urb, urb->status, urb->actual_length);
 551
 552         if (!test_bit(HCI_RUNNING, &hdev->flags))
 553                 goto done;
 554
 555         if (!urb->status)
 556                 hdev->stat.byte_tx += urb->transfer_buffer_length;
 557         else
 558                 hdev->stat.err_tx++;
 559
 560 done:
 561         kfree(urb->setup_packet);
 562
 563         kfree_skb(skb);
 564 }
 565
 566 static int btusb_open(struct hci_dev *hdev)
 567 {
 568         struct btusb_data *data = hdev->driver_data;
 569         int err;
 570
 571         BT_DBG("%s", hdev->name);
 572
 573         err = usb_autopm_get_interface(data->intf);
 574         if (err < 0)
 575                 return err;
 576
 577         data->intf->needs_remote_wakeup = 1;
 578
 579         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
 580                 goto done;
 581
 582         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
 583                 goto done;
 584
 585         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
 586         if (err < 0)
 587                 goto failed;
 588
 589         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
 590         if (err < 0) {
 591                 usb_kill_anchored_urbs(&data->intr_anchor);
 592                 goto failed;
 593         }
 594
 595         set_bit(BTUSB_BULK_RUNNING, &data->flags);
 596         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
 597
 598 done:
 599         usb_autopm_put_interface(data->intf);
 600         return 0;
 601
 602 failed:
 603         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
 604         clear_bit(HCI_RUNNING, &hdev->flags);
 605         usb_autopm_put_interface(data->intf);
 606         return err;
 607 }
 608
 609 static void btusb_stop_traffic(struct btusb_data *data)
 610 {
 611         usb_kill_anchored_urbs(&data->intr_anchor);
 612         usb_kill_anchored_urbs(&data->bulk_anchor);
 613         usb_kill_anchored_urbs(&data->isoc_anchor);
 614 }
 615
 616 static int btusb_close(struct hci_dev *hdev)
 617 {
 618         struct btusb_data *data = hdev->driver_data;
 619         int err;
 620
 621         BT_DBG("%s", hdev->name);
 622
 623         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 624                 return 0;
 625
 626         cancel_work_sync(&data->work);
 627         cancel_work_sync(&data->waker);
 628
 629         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 630         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
 631         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
 632
 633         btusb_stop_traffic(data);
 634         err = usb_autopm_get_interface(data->intf);
 635         if (err < 0)
 636                 goto failed;
 637
 638         data->intf->needs_remote_wakeup = 0;
 639         usb_autopm_put_interface(data->intf);
 640
 641 failed:
 642         usb_scuttle_anchored_urbs(&data->deferred);
 643         return 0;
 644 }
 645
 646 static int btusb_flush(struct hci_dev *hdev)
 647 {
 648         struct btusb_data *data = hdev->driver_data;
 649
 650         BT_DBG("%s", hdev->name);
 651
 652         usb_kill_anchored_urbs(&data->tx_anchor);
 653
 654         return 0;
 655 }
 656
 657 static int btusb_send_frame(struct sk_buff *skb)
 658 {
 659         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 660         struct btusb_data *data = hdev->driver_data;
 661         struct usb_ctrlrequest *dr;
 662         struct urb *urb;
 663         unsigned int pipe;
 664         int err;
 665
 666         BT_DBG("%s", hdev->name);
 667
 668         if (!test_bit(HCI_RUNNING, &hdev->flags))
 669                 return -EBUSY;
 670
 671         switch (bt_cb(skb)->pkt_type) {
 672         case HCI_COMMAND_PKT:
 673                 urb = usb_alloc_urb(0, GFP_ATOMIC);
 674                 if (!urb)
 675                         return -ENOMEM;
 676
 677                 dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
 678                 if (!dr) {
 679                         usb_free_urb(urb);
 680                         return -ENOMEM;
 681                 }
 682
 683                 dr->bRequestType = data->cmdreq_type;
 684                 dr->bRequest     = 0;
 685                 dr->wIndex       = 0;
 686                 dr->wValue       = 0;
 687                 dr->wLength      = __cpu_to_le16(skb->len);
 688
 689                 pipe = usb_sndctrlpipe(data->udev, 0x00);
 690
 691                 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
 692                                 skb->data, skb->len, btusb_tx_complete, skb);
 693
 694                 hdev->stat.cmd_tx++;
 695                 break;
 696
 697         case HCI_ACLDATA_PKT:
 698                 if (!data->bulk_tx_ep || (hdev->conn_hash.acl_num < 1 &&
 699                                                 hdev->conn_hash.le_num < 1))
 700                         return -ENODEV;
 701
 702                 urb = usb_alloc_urb(0, GFP_ATOMIC);
 703                 if (!urb)
 704                         return -ENOMEM;
 705
 706                 pipe = usb_sndbulkpipe(data->udev,
 707                                         data->bulk_tx_ep->bEndpointAddress);
 708
 709                 usb_fill_bulk_urb(urb, data->udev, pipe,
 710                                 skb->data, skb->len, btusb_tx_complete, skb);
 711
 712                 hdev->stat.acl_tx++;
 713                 break;
 714
 715         case HCI_SCODATA_PKT:
 716                 if (!data->isoc_tx_ep || hdev->conn_hash.sco_num < 1)
 717                         return -ENODEV;
 718
 719                 urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_ATOMIC);
 720                 if (!urb)
 721                         return -ENOMEM;
 722
 723                 pipe = usb_sndisocpipe(data->udev,
 724                                         data->isoc_tx_ep->bEndpointAddress);
 725
 726                 usb_fill_int_urb(urb, data->udev, pipe,
 727                                 skb->data, skb->len, btusb_isoc_tx_complete,
 728                                 skb, data->isoc_tx_ep->bInterval);
 729
 730                 urb->transfer_flags  = URB_ISO_ASAP;
 731
 732                 __fill_isoc_descriptor(urb, skb->len,
 733                                 le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
 734
 735                 hdev->stat.sco_tx++;
 736                 goto skip_waking;
 737
 738         default:
 739                 return -EILSEQ;
 740         }
 741
 742         err = inc_tx(data);
 743         if (err) {
 744                 usb_anchor_urb(urb, &data->deferred);
 745                 schedule_work(&data->waker);
 746                 err = 0;
 747                 goto done;
 748         }
 749
 750 skip_waking:
 751         usb_anchor_urb(urb, &data->tx_anchor);
 752
 753         err = usb_submit_urb(urb, GFP_ATOMIC);
 754         if (err < 0) {
 755                 BT_ERR("%s urb %p submission failed", hdev->name, urb);
 756                 kfree(urb->setup_packet);
 757                 usb_unanchor_urb(urb);
 758         } else {
 759                 usb_mark_last_busy(data->udev);
 760         }
 761
 762         usb_free_urb(urb);
 763
 764 done:
 765         return err;
 766 }
 767
 768 static void btusb_destruct(struct hci_dev *hdev)
 769 {
 770         struct btusb_data *data = hdev->driver_data;
 771
 772         BT_DBG("%s", hdev->name);
 773
 774         kfree(data);
 775 }
 776
 777 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
 778 {
 779         struct btusb_data *data = hdev->driver_data;
 780
 781         BT_DBG("%s evt %d", hdev->name, evt);
 782
 783         if (hdev->conn_hash.sco_num != data->sco_num) {
 784                 data->sco_num = hdev->conn_hash.sco_num;
 785                 schedule_work(&data->work);
 786         }
 787 }
 788
 789 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
 790 {
 791         struct btusb_data *data = hdev->driver_data;
 792         struct usb_interface *intf = data->isoc;
 793         struct usb_endpoint_descriptor *ep_desc;
 794         int i, err;
 795
 796         if (!data->isoc)
 797                 return -ENODEV;
 798
 799         err = usb_set_interface(data->udev, 1, altsetting);
 800         if (err < 0) {
 801                 BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
 802                 return err;
 803         }
 804
 805         data->isoc_altsetting = altsetting;
 806
 807         data->isoc_tx_ep = NULL;
 808         data->isoc_rx_ep = NULL;
 809
 810         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
 811                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
 812
 813                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
 814                         data->isoc_tx_ep = ep_desc;
 815                         continue;
 816                 }
 817
 818                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
 819                         data->isoc_rx_ep = ep_desc;
 820                         continue;
 821                 }
 822         }
 823
 824         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
 825                 BT_ERR("%s invalid SCO descriptors", hdev->name);
 826                 return -ENODEV;
 827         }
 828
 829         return 0;
 830 }
 831
 832 static void btusb_work(struct work_struct *work)
 833 {
 834         struct btusb_data *data = container_of(work, struct btusb_data, work);
 835         struct hci_dev *hdev = data->hdev;
 836         int err;
 837
 838         if (hdev->conn_hash.sco_num > 0) {
 839                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
 840                         err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
 841                         if (err < 0) {
 842                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 843                                 usb_kill_anchored_urbs(&data->isoc_anchor);
 844                                 return;
 845                         }
 846
 847                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
 848                 }
 849                 if (data->isoc_altsetting != 2) {
 850                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 851                         usb_kill_anchored_urbs(&data->isoc_anchor);
 852
 853                         if (__set_isoc_interface(hdev, 2) < 0)
 854                                 return;
 855                 }
 856
 857                 if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
 858                         if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
 859                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 860                         else
 861                                 btusb_submit_isoc_urb(hdev, GFP_KERNEL);
 862                 }
 863         } else {
 864                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 865                 usb_kill_anchored_urbs(&data->isoc_anchor);
 866
 867                 __set_isoc_interface(hdev, 0);
 868                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
 869                         usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
 870         }
 871 }
 872
 873 static void btusb_waker(struct work_struct *work)
 874 {
 875         struct btusb_data *data = container_of(work, struct btusb_data, waker);
 876         int err;
 877
 878         err = usb_autopm_get_interface(data->intf);
 879         if (err < 0)
 880                 return;
 881
 882         usb_autopm_put_interface(data->intf);
 883 }
 884
 885 static int btusb_probe(struct usb_interface *intf,
 886                                 const struct usb_device_id *id)
 887 {
 888         struct usb_endpoint_descriptor *ep_desc;
 889         struct btusb_data *data;
 890         struct hci_dev *hdev;
 891         int i, err;
 892
 893         BT_DBG("intf %p id %p", intf, id);
 894
 895         /* interface numbers are hardcoded in the spec */
 896         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 897                 return -ENODEV;
 898
 899         if (!id->driver_info) {
 900                 const struct usb_device_id *match;
 901                 match = usb_match_id(intf, blacklist_table);
 902                 if (match)
 903                         id = match;
 904         }
 905
 906         if (id->driver_info == BTUSB_IGNORE)
 907                 return -ENODEV;
 908
 909         if (ignore_dga && id->driver_info & BTUSB_DIGIANSWER)
 910                 return -ENODEV;
 911
 912         if (ignore_csr && id->driver_info & BTUSB_CSR)
 913                 return -ENODEV;
 914
 915         if (ignore_sniffer && id->driver_info & BTUSB_SNIFFER)
 916                 return -ENODEV;
 917
 918         if (id->driver_info & BTUSB_ATH3012) {
 919                 struct usb_device *udev = interface_to_usbdev(intf);
 920
 921                 /* Old firmware would otherwise let ath3k driver load
 922                  * patch and sysconfig files */
 923                 if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001)
 924                         return -ENODEV;
 925         }
 926
 927         data = kzalloc(sizeof(*data), GFP_KERNEL);
 928         if (!data)
 929                 return -ENOMEM;
 930
 931         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
 932                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
 933
 934                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
 935                         data->intr_ep = ep_desc;
 936                         continue;
 937                 }
 938
 939                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
 940                         data->bulk_tx_ep = ep_desc;
 941                         continue;
 942                 }
 943
 944                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
 945                         data->bulk_rx_ep = ep_desc;
 946                         continue;
 947                 }
 948         }
 949
 950         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep) {
 951                 kfree(data);
 952                 return -ENODEV;
 953         }
 954
 955         data->cmdreq_type = USB_TYPE_CLASS;
 956
 957         data->udev = interface_to_usbdev(intf);
 958         data->intf = intf;
 959
 960         spin_lock_init(&data->lock);
 961
 962         INIT_WORK(&data->work, btusb_work);
 963         INIT_WORK(&data->waker, btusb_waker);
 964         spin_lock_init(&data->txlock);
 965
 966         init_usb_anchor(&data->tx_anchor);
 967         init_usb_anchor(&data->intr_anchor);
 968         init_usb_anchor(&data->bulk_anchor);
 969         init_usb_anchor(&data->isoc_anchor);
 970         init_usb_anchor(&data->deferred);
 971
 972         hdev = hci_alloc_dev();
 973         if (!hdev) {
 974                 kfree(data);
 975                 return -ENOMEM;
 976         }
 977
 978         hdev->bus = HCI_USB;
 979         hdev->driver_data = data;
 980
 981         data->hdev = hdev;
 982
 983         SET_HCIDEV_DEV(hdev, &intf->dev);
 984
 985         hdev->open     = btusb_open;
 986         hdev->close    = btusb_close;
 987         hdev->flush    = btusb_flush;
 988         hdev->send     = btusb_send_frame;
 989         hdev->destruct = btusb_destruct;
 990         hdev->notify   = btusb_notify;
 991
 992         hdev->owner = THIS_MODULE;
 993
 994         /* Interface numbers are hardcoded in the specification */
 995         data->isoc = usb_ifnum_to_if(data->udev, 1);
 996
 997         if (!reset)
 998                 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
 999
1000         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
1001                 if (!disable_scofix)
1002                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
1003         }
1004
1005         if (id->driver_info & BTUSB_BROKEN_ISOC)
1006                 data->isoc = NULL;
1007
1008         if (id->driver_info & BTUSB_DIGIANSWER) {
1009                 data->cmdreq_type = USB_TYPE_VENDOR;
1010                 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
1011         }
1012
1013         if (id->driver_info & BTUSB_CSR) {
1014                 struct usb_device *udev = data->udev;
1015
1016                 /* Old firmware would otherwise execute USB reset */
1017                 if (le16_to_cpu(udev->descriptor.bcdDevice) < 0x117)
1018                         set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
1019         }
1020
1021         if (id->driver_info & BTUSB_SNIFFER) {
1022                 struct usb_device *udev = data->udev;
1023
1024                 /* New sniffer firmware has crippled HCI interface */
1025                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
1026                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
1027
1028                 data->isoc = NULL;
1029         }
1030
1031         if (id->driver_info & BTUSB_BCM92035) {
1032                 unsigned char cmd[] = { 0x3b, 0xfc, 0x01, 0x00 };
1033                 struct sk_buff *skb;
1034
1035                 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
1036                 if (skb) {
1037                         memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));
1038                         skb_queue_tail(&hdev->driver_init, skb);
1039                 }
1040         }
1041
1042         if (data->isoc) {
1043                 err = usb_driver_claim_interface(&btusb_driver,
1044                                                         data->isoc, data);
1045                 if (err < 0) {
1046                         hci_free_dev(hdev);
1047                         kfree(data);
1048                         return err;
1049                 }
1050         }
1051
1052         err = hci_register_dev(hdev);
1053         if (err < 0) {
1054                 hci_free_dev(hdev);
1055                 kfree(data);
1056                 return err;
1057         }
1058
1059         usb_set_intfdata(intf, data);
1060
1061         return 0;
1062 }
1063
1064 static void btusb_disconnect(struct usb_interface *intf)
1065 {
1066         struct btusb_data *data = usb_get_intfdata(intf);
1067         struct hci_dev *hdev;
1068
1069         BT_DBG("intf %p", intf);
1070
1071         if (!data)
1072                 return;
1073
1074         hdev = data->hdev;
1075
1076         __hci_dev_hold(hdev);
1077
1078         usb_set_intfdata(data->intf, NULL);
1079
1080         if (data->isoc)
1081                 usb_set_intfdata(data->isoc, NULL);
1082
1083         hci_unregister_dev(hdev);
1084
1085         if (intf == data->isoc)
1086                 usb_driver_release_interface(&btusb_driver, data->intf);
1087         else if (data->isoc)
1088                 usb_driver_release_interface(&btusb_driver, data->isoc);
1089
1090         __hci_dev_put(hdev);
1091
1092         hci_free_dev(hdev);
1093 }
1094
1095 #ifdef CONFIG_PM
1096 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
1097 {
1098         struct btusb_data *data = usb_get_intfdata(intf);
1099
1100         BT_DBG("intf %p", intf);
1101
1102         if (data->suspend_count++)
1103                 return 0;
1104
1105         spin_lock_irq(&data->txlock);
1106         if (!((message.event & PM_EVENT_AUTO) && data->tx_in_flight)) {
1107                 set_bit(BTUSB_SUSPENDING, &data->flags);
1108                 spin_unlock_irq(&data->txlock);
1109         } else {
1110                 spin_unlock_irq(&data->txlock);
1111                 data->suspend_count--;
1112                 return -EBUSY;
1113         }
1114
1115         cancel_work_sync(&data->work);
1116
1117         btusb_stop_traffic(data);
1118         usb_kill_anchored_urbs(&data->tx_anchor);
1119
1120         return 0;
1121 }
1122
1123 static void play_deferred(struct btusb_data *data)
1124 {
1125         struct urb *urb;
1126         int err;
1127
1128         while ((urb = usb_get_from_anchor(&data->deferred))) {
1129                 err = usb_submit_urb(urb, GFP_ATOMIC);
1130                 if (err < 0)
1131                         break;
1132
1133                 data->tx_in_flight++;
1134         }
1135         usb_scuttle_anchored_urbs(&data->deferred);
1136 }
1137
1138 static int btusb_resume(struct usb_interface *intf)
1139 {
1140         struct btusb_data *data = usb_get_intfdata(intf);
1141         struct hci_dev *hdev = data->hdev;
1142         int err = 0;
1143
1144         BT_DBG("intf %p", intf);
1145
1146         if (--data->suspend_count)
1147                 return 0;
1148
1149         if (!test_bit(HCI_RUNNING, &hdev->flags))
1150                 goto done;
1151
1152         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
1153                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
1154                 if (err < 0) {
1155                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1156                         goto failed;
1157                 }
1158         }
1159
1160         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
1161                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
1162                 if (err < 0) {
1163                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1164                         goto failed;
1165                 }
1166
1167                 btusb_submit_bulk_urb(hdev, GFP_NOIO);
1168         }
1169
1170         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1171                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
1172                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1173                 else
1174                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
1175         }
1176
1177         spin_lock_irq(&data->txlock);
1178         play_deferred(data);
1179         clear_bit(BTUSB_SUSPENDING, &data->flags);
1180         spin_unlock_irq(&data->txlock);
1181         schedule_work(&data->work);
1182
1183         return 0;
1184
1185 failed:
1186         usb_scuttle_anchored_urbs(&data->deferred);
1187 done:
1188         spin_lock_irq(&data->txlock);
1189         clear_bit(BTUSB_SUSPENDING, &data->flags);
1190         spin_unlock_irq(&data->txlock);
1191
1192         return err;
1193 }
1194 #endif
1195
1196 static struct usb_driver btusb_driver = {
1197         .name           = "btusb",
1198         .probe          = btusb_probe,
1199         .disconnect     = btusb_disconnect,
1200 #ifdef CONFIG_PM
1201         .suspend        = btusb_suspend,
1202         .resume         = btusb_resume,
1203 #endif
1204         .id_table       = btusb_table,
1205         .supports_autosuspend = 1,
1206 };
1207
1208 static int __init btusb_init(void)
1209 {
1210         BT_INFO("Generic Bluetooth USB driver ver %s", VERSION);
1211
1212         return usb_register(&btusb_driver);
1213 }
1214
1215 static void __exit btusb_exit(void)
1216 {
1217         usb_deregister(&btusb_driver);
1218 }
1219
1220 module_init(btusb_init);
1221 module_exit(btusb_exit);
1222
1223 module_param(ignore_dga, bool, 0644);
1224 MODULE_PARM_DESC(ignore_dga, "Ignore devices with id 08fd:0001");
1225
1226 module_param(ignore_csr, bool, 0644);
1227 MODULE_PARM_DESC(ignore_csr, "Ignore devices with id 0a12:0001");
1228
1229 module_param(ignore_sniffer, bool, 0644);
1230 MODULE_PARM_DESC(ignore_sniffer, "Ignore devices with id 0a12:0002");
1231
1232 module_param(disable_scofix, bool, 0644);
1233 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
1234
1235 module_param(force_scofix, bool, 0644);
1236 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
1237
1238 module_param(reset, bool, 0644);
1239 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
1240
1241 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
1242 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
1243 MODULE_VERSION(VERSION);
1244 MODULE_LICENSE("GPL");