drivers/bluetooth/hci_ldisc.c

   1 /*
   2  *
   3  *  Bluetooth HCI UART driver
   4  *
   5  *  Copyright (C) 2000-2001  Qualcomm Incorporated
   6  *  Copyright (C) 2002-2003  Maxim Krasnyansky <maxk@qualcomm.com>
   7  *  Copyright (C) 2004-2005  Marcel Holtmann <marcel@holtmann.org>
   8  *
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  *
  24  */
  25
  26 #include <linux/module.h>
  27
  28 #include <linux/kernel.h>
  29 #include <linux/init.h>
  30 #include <linux/types.h>
  31 #include <linux/fcntl.h>
  32 #include <linux/interrupt.h>
  33 #include <linux/ptrace.h>
  34 #include <linux/poll.h>
  35
  36 #include <linux/slab.h>
  37 #include <linux/tty.h>
  38 #include <linux/errno.h>
  39 #include <linux/string.h>
  40 #include <linux/signal.h>
  41 #include <linux/ioctl.h>
  42 #include <linux/skbuff.h>
  43
  44 #include <net/bluetooth/bluetooth.h>
  45 #include <net/bluetooth/hci_core.h>
  46
  47 #include "btintel.h"
  48 #include "btbcm.h"
  49 #include "hci_uart.h"
  50
  51 #define VERSION "2.3"
  52
  53 static const struct hci_uart_proto *hup[HCI_UART_MAX_PROTO];
  54
  55 int hci_uart_register_proto(const struct hci_uart_proto *p)
  56 {
  57         if (p->id >= HCI_UART_MAX_PROTO)
  58                 return -EINVAL;
  59
  60         if (hup[p->id])
  61                 return -EEXIST;
  62
  63         hup[p->id] = p;
  64
  65         BT_INFO("HCI UART protocol %s registered", p->name);
  66
  67         return 0;
  68 }
  69
  70 int hci_uart_unregister_proto(const struct hci_uart_proto *p)
  71 {
  72         if (p->id >= HCI_UART_MAX_PROTO)
  73                 return -EINVAL;
  74
  75         if (!hup[p->id])
  76                 return -EINVAL;
  77
  78         hup[p->id] = NULL;
  79
  80         return 0;
  81 }
  82
  83 static const struct hci_uart_proto *hci_uart_get_proto(unsigned int id)
  84 {
  85         if (id >= HCI_UART_MAX_PROTO)
  86                 return NULL;
  87
  88         return hup[id];
  89 }
  90
  91 static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type)
  92 {
  93         struct hci_dev *hdev = hu->hdev;
  94
  95         /* Update HCI stat counters */
  96         switch (pkt_type) {
  97         case HCI_COMMAND_PKT:
  98                 hdev->stat.cmd_tx++;
  99                 break;
 100
 101         case HCI_ACLDATA_PKT:
 102                 hdev->stat.acl_tx++;
 103                 break;
 104
 105         case HCI_SCODATA_PKT:
 106                 hdev->stat.sco_tx++;
 107                 break;
 108         }
 109 }
 110
 111 static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu)
 112 {
 113         struct sk_buff *skb = hu->tx_skb;
 114
 115         if (!skb)
 116                 skb = hu->proto->dequeue(hu);
 117         else
 118                 hu->tx_skb = NULL;
 119
 120         return skb;
 121 }
 122
 123 int hci_uart_tx_wakeup(struct hci_uart *hu)
 124 {
 125         if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) {
 126                 set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state);
 127                 return 0;
 128         }
 129
 130         BT_DBG("");
 131
 132         schedule_work(&hu->write_work);
 133
 134         return 0;
 135 }
 136
 137 static void hci_uart_write_work(struct work_struct *work)
 138 {
 139         struct hci_uart *hu = container_of(work, struct hci_uart, write_work);
 140         struct tty_struct *tty = hu->tty;
 141         struct hci_dev *hdev = hu->hdev;
 142         struct sk_buff *skb;
 143
 144         /* REVISIT: should we cope with bad skbs or ->write() returning
 145          * and error value ?
 146          */
 147
 148 restart:
 149         clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state);
 150
 151         while ((skb = hci_uart_dequeue(hu))) {
 152                 int len;
 153
 154                 set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
 155                 len = tty->ops->write(tty, skb->data, skb->len);
 156                 hdev->stat.byte_tx += len;
 157
 158                 skb_pull(skb, len);
 159                 if (skb->len) {
 160                         hu->tx_skb = skb;
 161                         break;
 162                 }
 163
 164                 hci_uart_tx_complete(hu, bt_cb(skb)->pkt_type);
 165                 kfree_skb(skb);
 166         }
 167
 168         if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state))
 169                 goto restart;
 170
 171         clear_bit(HCI_UART_SENDING, &hu->tx_state);
 172 }
 173
 174 static void hci_uart_init_work(struct work_struct *work)
 175 {
 176         struct hci_uart *hu = container_of(work, struct hci_uart, init_ready);
 177         int err;
 178
 179         if (!test_and_clear_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
 180                 return;
 181
 182         err = hci_register_dev(hu->hdev);
 183         if (err < 0) {
 184                 BT_ERR("Can't register HCI device");
 185                 hci_free_dev(hu->hdev);
 186                 hu->hdev = NULL;
 187                 hu->proto->close(hu);
 188         }
 189
 190         set_bit(HCI_UART_REGISTERED, &hu->flags);
 191 }
 192
 193 int hci_uart_init_ready(struct hci_uart *hu)
 194 {
 195         if (!test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
 196                 return -EALREADY;
 197
 198         schedule_work(&hu->init_ready);
 199
 200         return 0;
 201 }
 202
 203 /* ------- Interface to HCI layer ------ */
 204 /* Initialize device */
 205 static int hci_uart_open(struct hci_dev *hdev)
 206 {
 207         BT_DBG("%s %p", hdev->name, hdev);
 208
 209         /* Nothing to do for UART driver */
 210
 211         set_bit(HCI_RUNNING, &hdev->flags);
 212
 213         return 0;
 214 }
 215
 216 /* Reset device */
 217 static int hci_uart_flush(struct hci_dev *hdev)
 218 {
 219         struct hci_uart *hu  = hci_get_drvdata(hdev);
 220         struct tty_struct *tty = hu->tty;
 221
 222         BT_DBG("hdev %p tty %p", hdev, tty);
 223
 224         if (hu->tx_skb) {
 225                 kfree_skb(hu->tx_skb); hu->tx_skb = NULL;
 226         }
 227
 228         /* Flush any pending characters in the driver and discipline. */
 229         tty_ldisc_flush(tty);
 230         tty_driver_flush_buffer(tty);
 231
 232         if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
 233                 hu->proto->flush(hu);
 234
 235         return 0;
 236 }
 237
 238 /* Close device */
 239 static int hci_uart_close(struct hci_dev *hdev)
 240 {
 241         BT_DBG("hdev %p", hdev);
 242
 243         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 244                 return 0;
 245
 246         hci_uart_flush(hdev);
 247         hdev->flush = NULL;
 248         return 0;
 249 }
 250
 251 /* Send frames from HCI layer */
 252 static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
 253 {
 254         struct hci_uart *hu = hci_get_drvdata(hdev);
 255
 256         if (!test_bit(HCI_RUNNING, &hdev->flags))
 257                 return -EBUSY;
 258
 259         BT_DBG("%s: type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
 260
 261         hu->proto->enqueue(hu, skb);
 262
 263         hci_uart_tx_wakeup(hu);
 264
 265         return 0;
 266 }
 267
 268 static int hci_uart_setup(struct hci_dev *hdev)
 269 {
 270         struct hci_uart *hu = hci_get_drvdata(hdev);
 271         struct hci_rp_read_local_version *ver;
 272         struct sk_buff *skb;
 273
 274         if (hu->proto->setup)
 275                 return hu->proto->setup(hu);
 276
 277         if (!test_bit(HCI_UART_VND_DETECT, &hu->hdev_flags))
 278                 return 0;
 279
 280         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
 281                              HCI_INIT_TIMEOUT);
 282         if (IS_ERR(skb)) {
 283                 BT_ERR("%s: Reading local version information failed (%ld)",
 284                        hdev->name, PTR_ERR(skb));
 285                 return 0;
 286         }
 287
 288         if (skb->len != sizeof(*ver)) {
 289                 BT_ERR("%s: Event length mismatch for version information",
 290                        hdev->name);
 291                 goto done;
 292         }
 293
 294         ver = (struct hci_rp_read_local_version *)skb->data;
 295
 296         switch (le16_to_cpu(ver->manufacturer)) {
 297 #ifdef CONFIG_BT_HCIUART_INTEL
 298         case 2:
 299                 hdev->set_bdaddr = btintel_set_bdaddr;
 300                 btintel_check_bdaddr(hdev);
 301                 break;
 302 #endif
 303 #ifdef CONFIG_BT_HCIUART_BCM
 304         case 15:
 305                 hdev->set_bdaddr = btbcm_set_bdaddr;
 306                 btbcm_check_bdaddr(hdev);
 307                 break;
 308 #endif
 309         }
 310
 311 done:
 312         kfree_skb(skb);
 313         return 0;
 314 }
 315
 316 /* ------ LDISC part ------ */
 317 /* hci_uart_tty_open
 318  *
 319  *     Called when line discipline changed to HCI_UART.
 320  *
 321  * Arguments:
 322  *     tty    pointer to tty info structure
 323  * Return Value:
 324  *     0 if success, otherwise error code
 325  */
 326 static int hci_uart_tty_open(struct tty_struct *tty)
 327 {
 328         struct hci_uart *hu;
 329
 330         BT_DBG("tty %p", tty);
 331
 332         /* Error if the tty has no write op instead of leaving an exploitable
 333            hole */
 334         if (tty->ops->write == NULL)
 335                 return -EOPNOTSUPP;
 336
 337         hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL);
 338         if (!hu) {
 339                 BT_ERR("Can't allocate control structure");
 340                 return -ENFILE;
 341         }
 342
 343         tty->disc_data = hu;
 344         hu->tty = tty;
 345         tty->receive_room = 65536;
 346
 347         INIT_WORK(&hu->init_ready, hci_uart_init_work);
 348         INIT_WORK(&hu->write_work, hci_uart_write_work);
 349
 350         spin_lock_init(&hu->rx_lock);
 351
 352         /* Flush any pending characters in the driver and line discipline. */
 353
 354         /* FIXME: why is this needed. Note don't use ldisc_ref here as the
 355            open path is before the ldisc is referencable */
 356
 357         if (tty->ldisc->ops->flush_buffer)
 358                 tty->ldisc->ops->flush_buffer(tty);
 359         tty_driver_flush_buffer(tty);
 360
 361         return 0;
 362 }
 363
 364 /* hci_uart_tty_close()
 365  *
 366  *    Called when the line discipline is changed to something
 367  *    else, the tty is closed, or the tty detects a hangup.
 368  */
 369 static void hci_uart_tty_close(struct tty_struct *tty)
 370 {
 371         struct hci_uart *hu = tty->disc_data;
 372         struct hci_dev *hdev;
 373
 374         BT_DBG("tty %p", tty);
 375
 376         /* Detach from the tty */
 377         tty->disc_data = NULL;
 378
 379         if (!hu)
 380                 return;
 381
 382         hdev = hu->hdev;
 383         if (hdev)
 384                 hci_uart_close(hdev);
 385
 386         cancel_work_sync(&hu->write_work);
 387
 388         if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) {
 389                 if (hdev) {
 390                         if (test_bit(HCI_UART_REGISTERED, &hu->flags))
 391                                 hci_unregister_dev(hdev);
 392                         hci_free_dev(hdev);
 393                 }
 394                 hu->proto->close(hu);
 395         }
 396
 397         kfree(hu);
 398 }
 399
 400 /* hci_uart_tty_wakeup()
 401  *
 402  *    Callback for transmit wakeup. Called when low level
 403  *    device driver can accept more send data.
 404  *
 405  * Arguments:        tty    pointer to associated tty instance data
 406  * Return Value:    None
 407  */
 408 static void hci_uart_tty_wakeup(struct tty_struct *tty)
 409 {
 410         struct hci_uart *hu = tty->disc_data;
 411
 412         BT_DBG("");
 413
 414         if (!hu)
 415                 return;
 416
 417         clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
 418
 419         if (tty != hu->tty)
 420                 return;
 421
 422         if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
 423                 hci_uart_tx_wakeup(hu);
 424 }
 425
 426 /* hci_uart_tty_receive()
 427  *
 428  *     Called by tty low level driver when receive data is
 429  *     available.
 430  *
 431  * Arguments:  tty          pointer to tty isntance data
 432  *             data         pointer to received data
 433  *             flags        pointer to flags for data
 434  *             count        count of received data in bytes
 435  *
 436  * Return Value:    None
 437  */
 438 static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data,
 439                                  char *flags, int count)
 440 {
 441         struct hci_uart *hu = tty->disc_data;
 442
 443         if (!hu || tty != hu->tty)
 444                 return;
 445
 446         if (!test_bit(HCI_UART_PROTO_SET, &hu->flags))
 447                 return;
 448
 449         spin_lock(&hu->rx_lock);
 450         hu->proto->recv(hu, data, count);
 451
 452         if (hu->hdev)
 453                 hu->hdev->stat.byte_rx += count;
 454
 455         spin_unlock(&hu->rx_lock);
 456
 457         tty_unthrottle(tty);
 458 }
 459
 460 static int hci_uart_register_dev(struct hci_uart *hu)
 461 {
 462         struct hci_dev *hdev;
 463
 464         BT_DBG("");
 465
 466         /* Initialize and register HCI device */
 467         hdev = hci_alloc_dev();
 468         if (!hdev) {
 469                 BT_ERR("Can't allocate HCI device");
 470                 return -ENOMEM;
 471         }
 472
 473         hu->hdev = hdev;
 474
 475         hdev->bus = HCI_UART;
 476         hci_set_drvdata(hdev, hu);
 477
 478         hdev->open  = hci_uart_open;
 479         hdev->close = hci_uart_close;
 480         hdev->flush = hci_uart_flush;
 481         hdev->send  = hci_uart_send_frame;
 482         hdev->setup = hci_uart_setup;
 483         SET_HCIDEV_DEV(hdev, hu->tty->dev);
 484
 485         if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags))
 486                 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
 487
 488         if (test_bit(HCI_UART_EXT_CONFIG, &hu->hdev_flags))
 489                 set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks);
 490
 491         if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags))
 492                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
 493
 494         if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags))
 495                 hdev->dev_type = HCI_AMP;
 496         else
 497                 hdev->dev_type = HCI_BREDR;
 498
 499         if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
 500                 return 0;
 501
 502         if (hci_register_dev(hdev) < 0) {
 503                 BT_ERR("Can't register HCI device");
 504                 hci_free_dev(hdev);
 505                 return -ENODEV;
 506         }
 507
 508         set_bit(HCI_UART_REGISTERED, &hu->flags);
 509
 510         return 0;
 511 }
 512
 513 static int hci_uart_set_proto(struct hci_uart *hu, int id)
 514 {
 515         const struct hci_uart_proto *p;
 516         int err;
 517
 518         p = hci_uart_get_proto(id);
 519         if (!p)
 520                 return -EPROTONOSUPPORT;
 521
 522         err = p->open(hu);
 523         if (err)
 524                 return err;
 525
 526         hu->proto = p;
 527
 528         err = hci_uart_register_dev(hu);
 529         if (err) {
 530                 p->close(hu);
 531                 return err;
 532         }
 533
 534         return 0;
 535 }
 536
 537 static int hci_uart_set_flags(struct hci_uart *hu, unsigned long flags)
 538 {
 539         unsigned long valid_flags = BIT(HCI_UART_RAW_DEVICE) |
 540                                     BIT(HCI_UART_RESET_ON_INIT) |
 541                                     BIT(HCI_UART_CREATE_AMP) |
 542                                     BIT(HCI_UART_INIT_PENDING) |
 543                                     BIT(HCI_UART_EXT_CONFIG) |
 544                                     BIT(HCI_UART_VND_DETECT);
 545
 546         if (flags & ~valid_flags)
 547                 return -EINVAL;
 548
 549         hu->hdev_flags = flags;
 550
 551         return 0;
 552 }
 553
 554 /* hci_uart_tty_ioctl()
 555  *
 556  *    Process IOCTL system call for the tty device.
 557  *
 558  * Arguments:
 559  *
 560  *    tty        pointer to tty instance data
 561  *    file       pointer to open file object for device
 562  *    cmd        IOCTL command code
 563  *    arg        argument for IOCTL call (cmd dependent)
 564  *
 565  * Return Value:    Command dependent
 566  */
 567 static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file *file,
 568                               unsigned int cmd, unsigned long arg)
 569 {
 570         struct hci_uart *hu = tty->disc_data;
 571         int err = 0;
 572
 573         BT_DBG("");
 574
 575         /* Verify the status of the device */
 576         if (!hu)
 577                 return -EBADF;
 578
 579         switch (cmd) {
 580         case HCIUARTSETPROTO:
 581                 if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) {
 582                         err = hci_uart_set_proto(hu, arg);
 583                         if (err) {
 584                                 clear_bit(HCI_UART_PROTO_SET, &hu->flags);
 585                                 return err;
 586                         }
 587                 } else
 588                         return -EBUSY;
 589                 break;
 590
 591         case HCIUARTGETPROTO:
 592                 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
 593                         return hu->proto->id;
 594                 return -EUNATCH;
 595
 596         case HCIUARTGETDEVICE:
 597                 if (test_bit(HCI_UART_REGISTERED, &hu->flags))
 598                         return hu->hdev->id;
 599                 return -EUNATCH;
 600
 601         case HCIUARTSETFLAGS:
 602                 if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
 603                         return -EBUSY;
 604                 err = hci_uart_set_flags(hu, arg);
 605                 if (err)
 606                         return err;
 607                 break;
 608
 609         case HCIUARTGETFLAGS:
 610                 return hu->hdev_flags;
 611
 612         default:
 613                 err = n_tty_ioctl_helper(tty, file, cmd, arg);
 614                 break;
 615         }
 616
 617         return err;
 618 }
 619
 620 /*
 621  * We don't provide read/write/poll interface for user space.
 622  */
 623 static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file,
 624                                  unsigned char __user *buf, size_t nr)
 625 {
 626         return 0;
 627 }
 628
 629 static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file,
 630                                   const unsigned char *data, size_t count)
 631 {
 632         return 0;
 633 }
 634
 635 static unsigned int hci_uart_tty_poll(struct tty_struct *tty,
 636                                       struct file *filp, poll_table *wait)
 637 {
 638         return 0;
 639 }
 640
 641 static int __init hci_uart_init(void)
 642 {
 643         static struct tty_ldisc_ops hci_uart_ldisc;
 644         int err;
 645
 646         BT_INFO("HCI UART driver ver %s", VERSION);
 647
 648         /* Register the tty discipline */
 649
 650         memset(&hci_uart_ldisc, 0, sizeof (hci_uart_ldisc));
 651         hci_uart_ldisc.magic            = TTY_LDISC_MAGIC;
 652         hci_uart_ldisc.name             = "n_hci";
 653         hci_uart_ldisc.open             = hci_uart_tty_open;
 654         hci_uart_ldisc.close            = hci_uart_tty_close;
 655         hci_uart_ldisc.read             = hci_uart_tty_read;
 656         hci_uart_ldisc.write            = hci_uart_tty_write;
 657         hci_uart_ldisc.ioctl            = hci_uart_tty_ioctl;
 658         hci_uart_ldisc.poll             = hci_uart_tty_poll;
 659         hci_uart_ldisc.receive_buf      = hci_uart_tty_receive;
 660         hci_uart_ldisc.write_wakeup     = hci_uart_tty_wakeup;
 661         hci_uart_ldisc.owner            = THIS_MODULE;
 662
 663         err = tty_register_ldisc(N_HCI, &hci_uart_ldisc);
 664         if (err) {
 665                 BT_ERR("HCI line discipline registration failed. (%d)", err);
 666                 return err;
 667         }
 668
 669 #ifdef CONFIG_BT_HCIUART_H4
 670         h4_init();
 671 #endif
 672 #ifdef CONFIG_BT_HCIUART_BCSP
 673         bcsp_init();
 674 #endif
 675 #ifdef CONFIG_BT_HCIUART_LL
 676         ll_init();
 677 #endif
 678 #ifdef CONFIG_BT_HCIUART_ATH3K
 679         ath_init();
 680 #endif
 681 #ifdef CONFIG_BT_HCIUART_3WIRE
 682         h5_init();
 683 #endif
 684 #ifdef CONFIG_BT_HCIUART_BCM
 685         bcm_init();
 686 #endif
 687
 688         return 0;
 689 }
 690
 691 static void __exit hci_uart_exit(void)
 692 {
 693         int err;
 694
 695 #ifdef CONFIG_BT_HCIUART_H4
 696         h4_deinit();
 697 #endif
 698 #ifdef CONFIG_BT_HCIUART_BCSP
 699         bcsp_deinit();
 700 #endif
 701 #ifdef CONFIG_BT_HCIUART_LL
 702         ll_deinit();
 703 #endif
 704 #ifdef CONFIG_BT_HCIUART_ATH3K
 705         ath_deinit();
 706 #endif
 707 #ifdef CONFIG_BT_HCIUART_3WIRE
 708         h5_deinit();
 709 #endif
 710 #ifdef CONFIG_BT_HCIUART_BCM
 711         bcm_deinit();
 712 #endif
 713
 714         /* Release tty registration of line discipline */
 715         err = tty_unregister_ldisc(N_HCI);
 716         if (err)
 717                 BT_ERR("Can't unregister HCI line discipline (%d)", err);
 718 }
 719
 720 module_init(hci_uart_init);
 721 module_exit(hci_uart_exit);
 722
 723 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 724 MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION);
 725 MODULE_VERSION(VERSION);
 726 MODULE_LICENSE("GPL");
 727 MODULE_ALIAS_LDISC(N_HCI);