drivers/media/radio/dsbr100.c

   1 /* A driver for the D-Link DSB-R100 USB radio and Gemtek USB Radio 21.
   2  The device plugs into both the USB and an analog audio input, so this thing
   3  only deals with initialisation and frequency setting, the
   4  audio data has to be handled by a sound driver.
   5
   6  Major issue: I can't find out where the device reports the signal
   7  strength, and indeed the windows software appearantly just looks
   8  at the stereo indicator as well.  So, scanning will only find
   9  stereo stations.  Sad, but I can't help it.
  10
  11  Also, the windows program sends oodles of messages over to the
  12  device, and I couldn't figure out their meaning.  My suspicion
  13  is that they don't have any:-)
  14
  15  You might find some interesting stuff about this module at
  16  http://unimut.fsk.uni-heidelberg.de/unimut/demi/dsbr
  17
  18  Copyright (c) 2000 Markus Demleitner <msdemlei@cl.uni-heidelberg.de>
  19
  20  This program is free software; you can redistribute it and/or modify
  21  it under the terms of the GNU General Public License as published by
  22  the Free Software Foundation; either version 2 of the License, or
  23  (at your option) any later version.
  24
  25  This program is distributed in the hope that it will be useful,
  26  but WITHOUT ANY WARRANTY; without even the implied warranty of
  27  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  28  GNU General Public License for more details.
  29
  30  You should have received a copy of the GNU General Public License
  31  along with this program; if not, write to the Free Software
  32  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  33
  34  History:
  35
  36  Version 0.46:
  37         Removed usb_dsbr100_open/close calls and radio->users counter. Also,
  38         radio->muted changed to radio->status and suspend/resume calls updated.
  39
  40  Version 0.45:
  41         Converted to v4l2_device.
  42
  43  Version 0.44:
  44         Add suspend/resume functions, fix unplug of device,
  45         a lot of cleanups and fixes by Alexey Klimov <klimov.linux@gmail.com>
  46
  47  Version 0.43:
  48         Oliver Neukum: avoided DMA coherency issue
  49
  50  Version 0.42:
  51         Converted dsbr100 to use video_ioctl2
  52         by Douglas Landgraf <dougsland@gmail.com>
  53
  54  Version 0.41-ac1:
  55         Alan Cox: Some cleanups and fixes
  56
  57  Version 0.41:
  58         Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
  59
  60  Version 0.40:
  61         Markus: Updates for 2.6.x kernels, code layout changes, name sanitizing
  62
  63  Version 0.30:
  64         Markus: Updates for 2.5.x kernel and more ISO compliant source
  65
  66  Version 0.25:
  67         PSL and Markus: Cleanup, radio now doesn't stop on device close
  68
  69  Version 0.24:
  70         Markus: Hope I got these silly VIDEO_TUNER_LOW issues finally
  71         right.  Some minor cleanup, improved standalone compilation
  72
  73  Version 0.23:
  74         Markus: Sign extension bug fixed by declaring transfer_buffer unsigned
  75
  76  Version 0.22:
  77         Markus: Some (brown bag) cleanup in what VIDIOCSTUNER returns,
  78         thanks to Mike Cox for pointing the problem out.
  79
  80  Version 0.21:
  81         Markus: Minor cleanup, warnings if something goes wrong, lame attempt
  82         to adhere to Documentation/CodingStyle
  83
  84  Version 0.2:
  85         Brad Hards <bradh@dynamite.com.au>: Fixes to make it work as non-module
  86         Markus: Copyright clarification
  87
  88  Version 0.01: Markus: initial release
  89
  90 */
  91
  92 #include <linux/kernel.h>
  93 #include <linux/module.h>
  94 #include <linux/init.h>
  95 #include <linux/slab.h>
  96 #include <linux/input.h>
  97 #include <linux/videodev2.h>
  98 #include <media/v4l2-device.h>
  99 #include <media/v4l2-ioctl.h>
 100 #include <linux/usb.h>
 101
 102 /*
 103  * Version Information
 104  */
 105 #include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
 106
 107 #define DRIVER_VERSION "v0.46"
 108 #define RADIO_VERSION KERNEL_VERSION(0, 4, 6)
 109
 110 #define DRIVER_AUTHOR "Markus Demleitner <msdemlei@tucana.harvard.edu>"
 111 #define DRIVER_DESC "D-Link DSB-R100 USB FM radio driver"
 112
 113 #define DSB100_VENDOR 0x04b4
 114 #define DSB100_PRODUCT 0x1002
 115
 116 /* Commands the device appears to understand */
 117 #define DSB100_TUNE 1
 118 #define DSB100_ONOFF 2
 119
 120 #define TB_LEN 16
 121
 122 /* Frequency limits in MHz -- these are European values.  For Japanese
 123 devices, that would be 76 and 91.  */
 124 #define FREQ_MIN  87.5
 125 #define FREQ_MAX 108.0
 126 #define FREQ_MUL 16000
 127
 128 /* defines for radio->status */
 129 #define STARTED 0
 130 #define STOPPED 1
 131
 132 #define v4l2_dev_to_radio(d) container_of(d, struct dsbr100_device, v4l2_dev)
 133
 134 static int usb_dsbr100_probe(struct usb_interface *intf,
 135                              const struct usb_device_id *id);
 136 static void usb_dsbr100_disconnect(struct usb_interface *intf);
 137 static int usb_dsbr100_suspend(struct usb_interface *intf,
 138                                                 pm_message_t message);
 139 static int usb_dsbr100_resume(struct usb_interface *intf);
 140
 141 static int radio_nr = -1;
 142 module_param(radio_nr, int, 0);
 143
 144 /* Data for one (physical) device */
 145 struct dsbr100_device {
 146         struct usb_device *usbdev;
 147         struct video_device videodev;
 148         struct v4l2_device v4l2_dev;
 149
 150         u8 *transfer_buffer;
 151         struct mutex v4l2_lock;
 152         int curfreq;
 153         int stereo;
 154         int status;
 155 };
 156
 157 static struct usb_device_id usb_dsbr100_device_table [] = {
 158         { USB_DEVICE(DSB100_VENDOR, DSB100_PRODUCT) },
 159         { }                                             /* Terminating entry */
 160 };
 161
 162 MODULE_DEVICE_TABLE (usb, usb_dsbr100_device_table);
 163
 164 /* USB subsystem interface */
 165 static struct usb_driver usb_dsbr100_driver = {
 166         .name                   = "dsbr100",
 167         .probe                  = usb_dsbr100_probe,
 168         .disconnect             = usb_dsbr100_disconnect,
 169         .id_table               = usb_dsbr100_device_table,
 170         .suspend                = usb_dsbr100_suspend,
 171         .resume                 = usb_dsbr100_resume,
 172         .reset_resume           = usb_dsbr100_resume,
 173         .supports_autosuspend   = 0,
 174 };
 175
 176 /* Low-level device interface begins here */
 177
 178 /* switch on radio */
 179 static int dsbr100_start(struct dsbr100_device *radio)
 180 {
 181         int retval;
 182         int request;
 183
 184         retval = usb_control_msg(radio->usbdev,
 185                 usb_rcvctrlpipe(radio->usbdev, 0),
 186                 USB_REQ_GET_STATUS,
 187                 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
 188                 0x00, 0xC7, radio->transfer_buffer, 8, 300);
 189
 190         if (retval < 0) {
 191                 request = USB_REQ_GET_STATUS;
 192                 goto usb_control_msg_failed;
 193         }
 194
 195         retval = usb_control_msg(radio->usbdev,
 196                 usb_rcvctrlpipe(radio->usbdev, 0),
 197                 DSB100_ONOFF,
 198                 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
 199                 0x01, 0x00, radio->transfer_buffer, 8, 300);
 200
 201         if (retval < 0) {
 202                 request = DSB100_ONOFF;
 203                 goto usb_control_msg_failed;
 204         }
 205
 206         radio->status = STARTED;
 207         return (radio->transfer_buffer)[0];
 208
 209 usb_control_msg_failed:
 210         dev_err(&radio->usbdev->dev,
 211                 "%s - usb_control_msg returned %i, request %i\n",
 212                         __func__, retval, request);
 213         return retval;
 214
 215 }
 216
 217 /* switch off radio */
 218 static int dsbr100_stop(struct dsbr100_device *radio)
 219 {
 220         int retval;
 221         int request;
 222
 223         retval = usb_control_msg(radio->usbdev,
 224                 usb_rcvctrlpipe(radio->usbdev, 0),
 225                 USB_REQ_GET_STATUS,
 226                 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
 227                 0x16, 0x1C, radio->transfer_buffer, 8, 300);
 228
 229         if (retval < 0) {
 230                 request = USB_REQ_GET_STATUS;
 231                 goto usb_control_msg_failed;
 232         }
 233
 234         retval = usb_control_msg(radio->usbdev,
 235                 usb_rcvctrlpipe(radio->usbdev, 0),
 236                 DSB100_ONOFF,
 237                 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
 238                 0x00, 0x00, radio->transfer_buffer, 8, 300);
 239
 240         if (retval < 0) {
 241                 request = DSB100_ONOFF;
 242                 goto usb_control_msg_failed;
 243         }
 244
 245         radio->status = STOPPED;
 246         return (radio->transfer_buffer)[0];
 247
 248 usb_control_msg_failed:
 249         dev_err(&radio->usbdev->dev,
 250                 "%s - usb_control_msg returned %i, request %i\n",
 251                         __func__, retval, request);
 252         return retval;
 253
 254 }
 255
 256 /* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
 257 static int dsbr100_setfreq(struct dsbr100_device *radio)
 258 {
 259         int retval;
 260         int request;
 261         int freq = (radio->curfreq / 16 * 80) / 1000 + 856;
 262
 263         retval = usb_control_msg(radio->usbdev,
 264                 usb_rcvctrlpipe(radio->usbdev, 0),
 265                 DSB100_TUNE,
 266                 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
 267                 (freq >> 8) & 0x00ff, freq & 0xff,
 268                 radio->transfer_buffer, 8, 300);
 269
 270         if (retval < 0) {
 271                 request = DSB100_TUNE;
 272                 goto usb_control_msg_failed;
 273         }
 274
 275         retval = usb_control_msg(radio->usbdev,
 276                 usb_rcvctrlpipe(radio->usbdev, 0),
 277                 USB_REQ_GET_STATUS,
 278                 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
 279                 0x96, 0xB7, radio->transfer_buffer, 8, 300);
 280
 281         if (retval < 0) {
 282                 request = USB_REQ_GET_STATUS;
 283                 goto usb_control_msg_failed;
 284         }
 285
 286         retval = usb_control_msg(radio->usbdev,
 287                 usb_rcvctrlpipe(radio->usbdev, 0),
 288                 USB_REQ_GET_STATUS,
 289                 USB_TYPE_VENDOR | USB_RECIP_DEVICE |  USB_DIR_IN,
 290                 0x00, 0x24, radio->transfer_buffer, 8, 300);
 291
 292         if (retval < 0) {
 293                 request = USB_REQ_GET_STATUS;
 294                 goto usb_control_msg_failed;
 295         }
 296
 297         radio->stereo = !((radio->transfer_buffer)[0] & 0x01);
 298         return (radio->transfer_buffer)[0];
 299
 300 usb_control_msg_failed:
 301         radio->stereo = -1;
 302         dev_err(&radio->usbdev->dev,
 303                 "%s - usb_control_msg returned %i, request %i\n",
 304                         __func__, retval, request);
 305         return retval;
 306 }
 307
 308 /* return the device status.  This is, in effect, just whether it
 309 sees a stereo signal or not.  Pity. */
 310 static void dsbr100_getstat(struct dsbr100_device *radio)
 311 {
 312         int retval;
 313
 314         retval = usb_control_msg(radio->usbdev,
 315                 usb_rcvctrlpipe(radio->usbdev, 0),
 316                 USB_REQ_GET_STATUS,
 317                 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
 318                 0x00 , 0x24, radio->transfer_buffer, 8, 300);
 319
 320         if (retval < 0) {
 321                 radio->stereo = -1;
 322                 dev_err(&radio->usbdev->dev,
 323                         "%s - usb_control_msg returned %i, request %i\n",
 324                                 __func__, retval, USB_REQ_GET_STATUS);
 325         } else {
 326                 radio->stereo = !(radio->transfer_buffer[0] & 0x01);
 327         }
 328 }
 329
 330 static int vidioc_querycap(struct file *file, void *priv,
 331                                         struct v4l2_capability *v)
 332 {
 333         struct dsbr100_device *radio = video_drvdata(file);
 334
 335         strlcpy(v->driver, "dsbr100", sizeof(v->driver));
 336         strlcpy(v->card, "D-Link R-100 USB FM Radio", sizeof(v->card));
 337         usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
 338         v->version = RADIO_VERSION;
 339         v->capabilities = V4L2_CAP_TUNER;
 340         return 0;
 341 }
 342
 343 static int vidioc_g_tuner(struct file *file, void *priv,
 344                                 struct v4l2_tuner *v)
 345 {
 346         struct dsbr100_device *radio = video_drvdata(file);
 347
 348         if (v->index > 0)
 349                 return -EINVAL;
 350
 351         dsbr100_getstat(radio);
 352         strcpy(v->name, "FM");
 353         v->type = V4L2_TUNER_RADIO;
 354         v->rangelow = FREQ_MIN * FREQ_MUL;
 355         v->rangehigh = FREQ_MAX * FREQ_MUL;
 356         v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
 357         v->capability = V4L2_TUNER_CAP_LOW;
 358         if(radio->stereo)
 359                 v->audmode = V4L2_TUNER_MODE_STEREO;
 360         else
 361                 v->audmode = V4L2_TUNER_MODE_MONO;
 362         v->signal = 0xffff;     /* We can't get the signal strength */
 363         return 0;
 364 }
 365
 366 static int vidioc_s_tuner(struct file *file, void *priv,
 367                                 struct v4l2_tuner *v)
 368 {
 369         return v->index ? -EINVAL : 0;
 370 }
 371
 372 static int vidioc_s_frequency(struct file *file, void *priv,
 373                                 struct v4l2_frequency *f)
 374 {
 375         struct dsbr100_device *radio = video_drvdata(file);
 376         int retval;
 377
 378         radio->curfreq = f->frequency;
 379
 380         retval = dsbr100_setfreq(radio);
 381         if (retval < 0)
 382                 dev_warn(&radio->usbdev->dev, "Set frequency failed\n");
 383         return 0;
 384 }
 385
 386 static int vidioc_g_frequency(struct file *file, void *priv,
 387                                 struct v4l2_frequency *f)
 388 {
 389         struct dsbr100_device *radio = video_drvdata(file);
 390
 391         f->type = V4L2_TUNER_RADIO;
 392         f->frequency = radio->curfreq;
 393         return 0;
 394 }
 395
 396 static int vidioc_queryctrl(struct file *file, void *priv,
 397                                 struct v4l2_queryctrl *qc)
 398 {
 399         switch (qc->id) {
 400         case V4L2_CID_AUDIO_MUTE:
 401                 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
 402         }
 403
 404         return -EINVAL;
 405 }
 406
 407 static int vidioc_g_ctrl(struct file *file, void *priv,
 408                                 struct v4l2_control *ctrl)
 409 {
 410         struct dsbr100_device *radio = video_drvdata(file);
 411
 412         switch (ctrl->id) {
 413         case V4L2_CID_AUDIO_MUTE:
 414                 ctrl->value = radio->status;
 415                 return 0;
 416         }
 417         return -EINVAL;
 418 }
 419
 420 static int vidioc_s_ctrl(struct file *file, void *priv,
 421                                 struct v4l2_control *ctrl)
 422 {
 423         struct dsbr100_device *radio = video_drvdata(file);
 424         int retval;
 425
 426         switch (ctrl->id) {
 427         case V4L2_CID_AUDIO_MUTE:
 428                 if (ctrl->value) {
 429                         retval = dsbr100_stop(radio);
 430                         if (retval < 0) {
 431                                 dev_warn(&radio->usbdev->dev,
 432                                          "Radio did not respond properly\n");
 433                                 return -EBUSY;
 434                         }
 435                 } else {
 436                         retval = dsbr100_start(radio);
 437                         if (retval < 0) {
 438                                 dev_warn(&radio->usbdev->dev,
 439                                          "Radio did not respond properly\n");
 440                                 return -EBUSY;
 441                         }
 442                 }
 443                 return 0;
 444         }
 445         return -EINVAL;
 446 }
 447
 448 static int vidioc_g_audio(struct file *file, void *priv,
 449                                 struct v4l2_audio *a)
 450 {
 451         if (a->index > 1)
 452                 return -EINVAL;
 453
 454         strcpy(a->name, "Radio");
 455         a->capability = V4L2_AUDCAP_STEREO;
 456         return 0;
 457 }
 458
 459 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 460 {
 461         *i = 0;
 462         return 0;
 463 }
 464
 465 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 466 {
 467         return i ? -EINVAL : 0;
 468 }
 469
 470 static int vidioc_s_audio(struct file *file, void *priv,
 471                                         struct v4l2_audio *a)
 472 {
 473         return a->index ? -EINVAL : 0;
 474 }
 475
 476 /* USB subsystem interface begins here */
 477
 478 /*
 479  * Handle unplugging of the device.
 480  * We call video_unregister_device in any case.
 481  * The last function called in this procedure is
 482  * usb_dsbr100_video_device_release
 483  */
 484 static void usb_dsbr100_disconnect(struct usb_interface *intf)
 485 {
 486         struct dsbr100_device *radio = usb_get_intfdata(intf);
 487
 488         v4l2_device_get(&radio->v4l2_dev);
 489         mutex_lock(&radio->v4l2_lock);
 490         usb_set_intfdata(intf, NULL);
 491         video_unregister_device(&radio->videodev);
 492         v4l2_device_disconnect(&radio->v4l2_dev);
 493         mutex_unlock(&radio->v4l2_lock);
 494         v4l2_device_put(&radio->v4l2_dev);
 495 }
 496
 497
 498 /* Suspend device - stop device. */
 499 static int usb_dsbr100_suspend(struct usb_interface *intf, pm_message_t message)
 500 {
 501         struct dsbr100_device *radio = usb_get_intfdata(intf);
 502         int retval;
 503
 504         mutex_lock(&radio->v4l2_lock);
 505         if (radio->status == STARTED) {
 506                 retval = dsbr100_stop(radio);
 507                 if (retval < 0)
 508                         dev_warn(&intf->dev, "dsbr100_stop failed\n");
 509
 510                 /* After dsbr100_stop() status set to STOPPED.
 511                  * If we want driver to start radio on resume
 512                  * we set status equal to STARTED.
 513                  * On resume we will check status and run radio if needed.
 514                  */
 515                 radio->status = STARTED;
 516         }
 517         mutex_unlock(&radio->v4l2_lock);
 518
 519         dev_info(&intf->dev, "going into suspend..\n");
 520
 521         return 0;
 522 }
 523
 524 /* Resume device - start device. */
 525 static int usb_dsbr100_resume(struct usb_interface *intf)
 526 {
 527         struct dsbr100_device *radio = usb_get_intfdata(intf);
 528         int retval;
 529
 530         mutex_lock(&radio->v4l2_lock);
 531         if (radio->status == STARTED) {
 532                 retval = dsbr100_start(radio);
 533                 if (retval < 0)
 534                         dev_warn(&intf->dev, "dsbr100_start failed\n");
 535         }
 536         mutex_unlock(&radio->v4l2_lock);
 537
 538         dev_info(&intf->dev, "coming out of suspend..\n");
 539
 540         return 0;
 541 }
 542
 543 /* free data structures */
 544 static void usb_dsbr100_release(struct v4l2_device *v4l2_dev)
 545 {
 546         struct dsbr100_device *radio = v4l2_dev_to_radio(v4l2_dev);
 547
 548         v4l2_device_unregister(&radio->v4l2_dev);
 549         kfree(radio->transfer_buffer);
 550         kfree(radio);
 551 }
 552
 553 /* File system interface */
 554 static const struct v4l2_file_operations usb_dsbr100_fops = {
 555         .owner          = THIS_MODULE,
 556         .unlocked_ioctl = video_ioctl2,
 557 };
 558
 559 static const struct v4l2_ioctl_ops usb_dsbr100_ioctl_ops = {
 560         .vidioc_querycap    = vidioc_querycap,
 561         .vidioc_g_tuner     = vidioc_g_tuner,
 562         .vidioc_s_tuner     = vidioc_s_tuner,
 563         .vidioc_g_frequency = vidioc_g_frequency,
 564         .vidioc_s_frequency = vidioc_s_frequency,
 565         .vidioc_queryctrl   = vidioc_queryctrl,
 566         .vidioc_g_ctrl      = vidioc_g_ctrl,
 567         .vidioc_s_ctrl      = vidioc_s_ctrl,
 568         .vidioc_g_audio     = vidioc_g_audio,
 569         .vidioc_s_audio     = vidioc_s_audio,
 570         .vidioc_g_input     = vidioc_g_input,
 571         .vidioc_s_input     = vidioc_s_input,
 572 };
 573
 574 /* check if the device is present and register with v4l and usb if it is */
 575 static int usb_dsbr100_probe(struct usb_interface *intf,
 576                                 const struct usb_device_id *id)
 577 {
 578         struct dsbr100_device *radio;
 579         struct v4l2_device *v4l2_dev;
 580         int retval;
 581
 582         radio = kzalloc(sizeof(struct dsbr100_device), GFP_KERNEL);
 583
 584         if (!radio)
 585                 return -ENOMEM;
 586
 587         radio->transfer_buffer = kmalloc(TB_LEN, GFP_KERNEL);
 588
 589         if (!(radio->transfer_buffer)) {
 590                 kfree(radio);
 591                 return -ENOMEM;
 592         }
 593
 594         v4l2_dev = &radio->v4l2_dev;
 595         v4l2_dev->release = usb_dsbr100_release;
 596
 597         retval = v4l2_device_register(&intf->dev, v4l2_dev);
 598         if (retval < 0) {
 599                 v4l2_err(v4l2_dev, "couldn't register v4l2_device\n");
 600                 kfree(radio->transfer_buffer);
 601                 kfree(radio);
 602                 return retval;
 603         }
 604
 605         mutex_init(&radio->v4l2_lock);
 606         strlcpy(radio->videodev.name, v4l2_dev->name, sizeof(radio->videodev.name));
 607         radio->videodev.v4l2_dev = v4l2_dev;
 608         radio->videodev.fops = &usb_dsbr100_fops;
 609         radio->videodev.ioctl_ops = &usb_dsbr100_ioctl_ops;
 610         radio->videodev.release = video_device_release_empty;
 611         radio->videodev.lock = &radio->v4l2_lock;
 612
 613         radio->usbdev = interface_to_usbdev(intf);
 614         radio->curfreq = FREQ_MIN * FREQ_MUL;
 615         radio->status = STOPPED;
 616
 617         video_set_drvdata(&radio->videodev, radio);
 618
 619         retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, radio_nr);
 620         if (retval < 0) {
 621                 v4l2_err(v4l2_dev, "couldn't register video device\n");
 622                 v4l2_device_unregister(v4l2_dev);
 623                 kfree(radio->transfer_buffer);
 624                 kfree(radio);
 625                 return -EIO;
 626         }
 627         usb_set_intfdata(intf, radio);
 628         return 0;
 629 }
 630
 631 static int __init dsbr100_init(void)
 632 {
 633         int retval = usb_register(&usb_dsbr100_driver);
 634         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
 635                DRIVER_DESC "\n");
 636         return retval;
 637 }
 638
 639 static void __exit dsbr100_exit(void)
 640 {
 641         usb_deregister(&usb_dsbr100_driver);
 642 }
 643
 644 module_init (dsbr100_init);
 645 module_exit (dsbr100_exit);
 646
 647 MODULE_AUTHOR( DRIVER_AUTHOR );
 648 MODULE_DESCRIPTION( DRIVER_DESC );
 649 MODULE_LICENSE("GPL");