kernel/drivers/media/usb/cpia2/cpia2_v4l.c

   1 /****************************************************************************
   2  *
   3  *  Filename: cpia2_v4l.c
   4  *
   5  *  Copyright 2001, STMicrolectronics, Inc.
   6  *      Contact:  steve.miller@st.com
   7  *  Copyright 2001,2005, Scott J. Bertin <scottbertin@yahoo.com>
   8  *
   9  *  Description:
  10  *     This is a USB driver for CPia2 based video cameras.
  11  *     The infrastructure of this driver is based on the cpia usb driver by
  12  *     Jochen Scharrlach and Johannes Erdfeldt.
  13  *
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License as published by
  16  *  the Free Software Foundation; either version 2 of the License, or
  17  *  (at your option) any later version.
  18  *
  19  *  This program is distributed in the hope that it will be useful,
  20  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  *  GNU General Public License for more details.
  23  *
  24  *  You should have received a copy of the GNU General Public License
  25  *  along with this program; if not, write to the Free Software
  26  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  *
  28  *  Stripped of 2.4 stuff ready for main kernel submit by
  29  *              Alan Cox <alan@lxorguk.ukuu.org.uk>
  30  ****************************************************************************/
  31
  32 #define CPIA_VERSION "3.0.1"
  33
  34 #include <linux/module.h>
  35 #include <linux/time.h>
  36 #include <linux/sched.h>
  37 #include <linux/slab.h>
  38 #include <linux/init.h>
  39 #include <linux/videodev2.h>
  40 #include <linux/stringify.h>
  41 #include <media/v4l2-ioctl.h>
  42 #include <media/v4l2-event.h>
  43
  44 #include "cpia2.h"
  45
  46 static int video_nr = -1;
  47 module_param(video_nr, int, 0);
  48 MODULE_PARM_DESC(video_nr, "video device to register (0=/dev/video0, etc)");
  49
  50 static int buffer_size = 68 * 1024;
  51 module_param(buffer_size, int, 0);
  52 MODULE_PARM_DESC(buffer_size, "Size for each frame buffer in bytes (default 68k)");
  53
  54 static int num_buffers = 3;
  55 module_param(num_buffers, int, 0);
  56 MODULE_PARM_DESC(num_buffers, "Number of frame buffers (1-"
  57                  __stringify(VIDEO_MAX_FRAME) ", default 3)");
  58
  59 static int alternate = DEFAULT_ALT;
  60 module_param(alternate, int, 0);
  61 MODULE_PARM_DESC(alternate, "USB Alternate (" __stringify(USBIF_ISO_1) "-"
  62                  __stringify(USBIF_ISO_6) ", default "
  63                  __stringify(DEFAULT_ALT) ")");
  64
  65 static int flicker_mode;
  66 module_param(flicker_mode, int, 0);
  67 MODULE_PARM_DESC(flicker_mode, "Flicker frequency (0 (disabled), " __stringify(50) " or "
  68                  __stringify(60) ", default 0)");
  69
  70 MODULE_AUTHOR("Steve Miller (STMicroelectronics) <steve.miller@st.com>");
  71 MODULE_DESCRIPTION("V4L-driver for STMicroelectronics CPiA2 based cameras");
  72 MODULE_SUPPORTED_DEVICE("video");
  73 MODULE_LICENSE("GPL");
  74 MODULE_VERSION(CPIA_VERSION);
  75
  76 #define ABOUT "V4L-Driver for Vision CPiA2 based cameras"
  77 #define CPIA2_CID_USB_ALT (V4L2_CID_USER_BASE | 0xf000)
  78
  79 /******************************************************************************
  80  *
  81  *  cpia2_open
  82  *
  83  *****************************************************************************/
  84 static int cpia2_open(struct file *file)
  85 {
  86         struct camera_data *cam = video_drvdata(file);
  87         int retval;
  88
  89         if (mutex_lock_interruptible(&cam->v4l2_lock))
  90                 return -ERESTARTSYS;
  91         retval = v4l2_fh_open(file);
  92         if (retval)
  93                 goto open_unlock;
  94
  95         if (v4l2_fh_is_singular_file(file)) {
  96                 if (cpia2_allocate_buffers(cam)) {
  97                         v4l2_fh_release(file);
  98                         retval = -ENOMEM;
  99                         goto open_unlock;
 100                 }
 101
 102                 /* reset the camera */
 103                 if (cpia2_reset_camera(cam) < 0) {
 104                         v4l2_fh_release(file);
 105                         retval = -EIO;
 106                         goto open_unlock;
 107                 }
 108
 109                 cam->APP_len = 0;
 110                 cam->COM_len = 0;
 111         }
 112
 113         cpia2_dbg_dump_registers(cam);
 114 open_unlock:
 115         mutex_unlock(&cam->v4l2_lock);
 116         return retval;
 117 }
 118
 119 /******************************************************************************
 120  *
 121  *  cpia2_close
 122  *
 123  *****************************************************************************/
 124 static int cpia2_close(struct file *file)
 125 {
 126         struct video_device *dev = video_devdata(file);
 127         struct camera_data *cam = video_get_drvdata(dev);
 128
 129         mutex_lock(&cam->v4l2_lock);
 130         if (video_is_registered(&cam->vdev) && v4l2_fh_is_singular_file(file)) {
 131                 cpia2_usb_stream_stop(cam);
 132
 133                 /* save camera state for later open */
 134                 cpia2_save_camera_state(cam);
 135
 136                 cpia2_set_low_power(cam);
 137                 cpia2_free_buffers(cam);
 138         }
 139
 140         if (cam->stream_fh == file->private_data) {
 141                 cam->stream_fh = NULL;
 142                 cam->mmapped = 0;
 143         }
 144         mutex_unlock(&cam->v4l2_lock);
 145         return v4l2_fh_release(file);
 146 }
 147
 148 /******************************************************************************
 149  *
 150  *  cpia2_v4l_read
 151  *
 152  *****************************************************************************/
 153 static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count,
 154                               loff_t *off)
 155 {
 156         struct camera_data *cam = video_drvdata(file);
 157         int noblock = file->f_flags&O_NONBLOCK;
 158         ssize_t ret;
 159
 160         if(!cam)
 161                 return -EINVAL;
 162
 163         if (mutex_lock_interruptible(&cam->v4l2_lock))
 164                 return -ERESTARTSYS;
 165         ret = cpia2_read(cam, buf, count, noblock);
 166         mutex_unlock(&cam->v4l2_lock);
 167         return ret;
 168 }
 169
 170
 171 /******************************************************************************
 172  *
 173  *  cpia2_v4l_poll
 174  *
 175  *****************************************************************************/
 176 static unsigned int cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait)
 177 {
 178         struct camera_data *cam = video_drvdata(filp);
 179         unsigned int res;
 180
 181         mutex_lock(&cam->v4l2_lock);
 182         res = cpia2_poll(cam, filp, wait);
 183         mutex_unlock(&cam->v4l2_lock);
 184         return res;
 185 }
 186
 187
 188 static int sync(struct camera_data *cam, int frame_nr)
 189 {
 190         struct framebuf *frame = &cam->buffers[frame_nr];
 191
 192         while (1) {
 193                 if (frame->status == FRAME_READY)
 194                         return 0;
 195
 196                 if (!cam->streaming) {
 197                         frame->status = FRAME_READY;
 198                         frame->length = 0;
 199                         return 0;
 200                 }
 201
 202                 mutex_unlock(&cam->v4l2_lock);
 203                 wait_event_interruptible(cam->wq_stream,
 204                                          !cam->streaming ||
 205                                          frame->status == FRAME_READY);
 206                 mutex_lock(&cam->v4l2_lock);
 207                 if (signal_pending(current))
 208                         return -ERESTARTSYS;
 209                 if (!video_is_registered(&cam->vdev))
 210                         return -ENOTTY;
 211         }
 212 }
 213
 214 /******************************************************************************
 215  *
 216  *  ioctl_querycap
 217  *
 218  *  V4L2 device capabilities
 219  *
 220  *****************************************************************************/
 221
 222 static int cpia2_querycap(struct file *file, void *fh, struct v4l2_capability *vc)
 223 {
 224         struct camera_data *cam = video_drvdata(file);
 225
 226         strcpy(vc->driver, "cpia2");
 227
 228         if (cam->params.pnp_id.product == 0x151)
 229                 strcpy(vc->card, "QX5 Microscope");
 230         else
 231                 strcpy(vc->card, "CPiA2 Camera");
 232         switch (cam->params.pnp_id.device_type) {
 233         case DEVICE_STV_672:
 234                 strcat(vc->card, " (672/");
 235                 break;
 236         case DEVICE_STV_676:
 237                 strcat(vc->card, " (676/");
 238                 break;
 239         default:
 240                 strcat(vc->card, " (XXX/");
 241                 break;
 242         }
 243         switch (cam->params.version.sensor_flags) {
 244         case CPIA2_VP_SENSOR_FLAGS_404:
 245                 strcat(vc->card, "404)");
 246                 break;
 247         case CPIA2_VP_SENSOR_FLAGS_407:
 248                 strcat(vc->card, "407)");
 249                 break;
 250         case CPIA2_VP_SENSOR_FLAGS_409:
 251                 strcat(vc->card, "409)");
 252                 break;
 253         case CPIA2_VP_SENSOR_FLAGS_410:
 254                 strcat(vc->card, "410)");
 255                 break;
 256         case CPIA2_VP_SENSOR_FLAGS_500:
 257                 strcat(vc->card, "500)");
 258                 break;
 259         default:
 260                 strcat(vc->card, "XXX)");
 261                 break;
 262         }
 263
 264         if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0)
 265                 memset(vc->bus_info,0, sizeof(vc->bus_info));
 266
 267         vc->device_caps = V4L2_CAP_VIDEO_CAPTURE |
 268                            V4L2_CAP_READWRITE |
 269                            V4L2_CAP_STREAMING;
 270         vc->capabilities = vc->device_caps |
 271                            V4L2_CAP_DEVICE_CAPS;
 272
 273         return 0;
 274 }
 275
 276 /******************************************************************************
 277  *
 278  *  ioctl_input
 279  *
 280  *  V4L2 input get/set/enumerate
 281  *
 282  *****************************************************************************/
 283
 284 static int cpia2_enum_input(struct file *file, void *fh, struct v4l2_input *i)
 285 {
 286         if (i->index)
 287                 return -EINVAL;
 288         strcpy(i->name, "Camera");
 289         i->type = V4L2_INPUT_TYPE_CAMERA;
 290         return 0;
 291 }
 292
 293 static int cpia2_g_input(struct file *file, void *fh, unsigned int *i)
 294 {
 295         *i = 0;
 296         return 0;
 297 }
 298
 299 static int cpia2_s_input(struct file *file, void *fh, unsigned int i)
 300 {
 301         return i ? -EINVAL : 0;
 302 }
 303
 304 /******************************************************************************
 305  *
 306  *  ioctl_enum_fmt
 307  *
 308  *  V4L2 format enumerate
 309  *
 310  *****************************************************************************/
 311
 312 static int cpia2_enum_fmt_vid_cap(struct file *file, void *fh,
 313                                             struct v4l2_fmtdesc *f)
 314 {
 315         int index = f->index;
 316
 317         if (index < 0 || index > 1)
 318                return -EINVAL;
 319
 320         memset(f, 0, sizeof(*f));
 321         f->index = index;
 322         f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 323         f->flags = V4L2_FMT_FLAG_COMPRESSED;
 324         switch(index) {
 325         case 0:
 326                 strcpy(f->description, "MJPEG");
 327                 f->pixelformat = V4L2_PIX_FMT_MJPEG;
 328                 break;
 329         case 1:
 330                 strcpy(f->description, "JPEG");
 331                 f->pixelformat = V4L2_PIX_FMT_JPEG;
 332                 break;
 333         default:
 334                 return -EINVAL;
 335         }
 336
 337         return 0;
 338 }
 339
 340 /******************************************************************************
 341  *
 342  *  ioctl_try_fmt
 343  *
 344  *  V4L2 format try
 345  *
 346  *****************************************************************************/
 347
 348 static int cpia2_try_fmt_vid_cap(struct file *file, void *fh,
 349                                           struct v4l2_format *f)
 350 {
 351         struct camera_data *cam = video_drvdata(file);
 352
 353         if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG &&
 354             f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
 355                return -EINVAL;
 356
 357         f->fmt.pix.field = V4L2_FIELD_NONE;
 358         f->fmt.pix.bytesperline = 0;
 359         f->fmt.pix.sizeimage = cam->frame_size;
 360         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 361         f->fmt.pix.priv = 0;
 362
 363         switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
 364         case VIDEOSIZE_VGA:
 365                 f->fmt.pix.width = 640;
 366                 f->fmt.pix.height = 480;
 367                 break;
 368         case VIDEOSIZE_CIF:
 369                 f->fmt.pix.width = 352;
 370                 f->fmt.pix.height = 288;
 371                 break;
 372         case VIDEOSIZE_QVGA:
 373                 f->fmt.pix.width = 320;
 374                 f->fmt.pix.height = 240;
 375                 break;
 376         case VIDEOSIZE_288_216:
 377                 f->fmt.pix.width = 288;
 378                 f->fmt.pix.height = 216;
 379                 break;
 380         case VIDEOSIZE_256_192:
 381                 f->fmt.pix.width = 256;
 382                 f->fmt.pix.height = 192;
 383                 break;
 384         case VIDEOSIZE_224_168:
 385                 f->fmt.pix.width = 224;
 386                 f->fmt.pix.height = 168;
 387                 break;
 388         case VIDEOSIZE_192_144:
 389                 f->fmt.pix.width = 192;
 390                 f->fmt.pix.height = 144;
 391                 break;
 392         case VIDEOSIZE_QCIF:
 393         default:
 394                 f->fmt.pix.width = 176;
 395                 f->fmt.pix.height = 144;
 396                 break;
 397         }
 398
 399         return 0;
 400 }
 401
 402 /******************************************************************************
 403  *
 404  *  ioctl_set_fmt
 405  *
 406  *  V4L2 format set
 407  *
 408  *****************************************************************************/
 409
 410 static int cpia2_s_fmt_vid_cap(struct file *file, void *_fh,
 411                                         struct v4l2_format *f)
 412 {
 413         struct camera_data *cam = video_drvdata(file);
 414         int err, frame;
 415
 416         err = cpia2_try_fmt_vid_cap(file, _fh, f);
 417         if(err != 0)
 418                 return err;
 419
 420         cam->pixelformat = f->fmt.pix.pixelformat;
 421
 422         /* NOTE: This should be set to 1 for MJPEG, but some apps don't handle
 423          * the missing Huffman table properly. */
 424         cam->params.compression.inhibit_htables = 0;
 425                 /*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/
 426
 427         /* we set the video window to something smaller or equal to what
 428          * is requested by the user???
 429          */
 430         DBG("Requested width = %d, height = %d\n",
 431             f->fmt.pix.width, f->fmt.pix.height);
 432         if (f->fmt.pix.width != cam->width ||
 433             f->fmt.pix.height != cam->height) {
 434                 cam->width = f->fmt.pix.width;
 435                 cam->height = f->fmt.pix.height;
 436                 cam->params.roi.width = f->fmt.pix.width;
 437                 cam->params.roi.height = f->fmt.pix.height;
 438                 cpia2_set_format(cam);
 439         }
 440
 441         for (frame = 0; frame < cam->num_frames; ++frame) {
 442                 if (cam->buffers[frame].status == FRAME_READING)
 443                         if ((err = sync(cam, frame)) < 0)
 444                                 return err;
 445
 446                 cam->buffers[frame].status = FRAME_EMPTY;
 447         }
 448
 449         return 0;
 450 }
 451
 452 /******************************************************************************
 453  *
 454  *  ioctl_get_fmt
 455  *
 456  *  V4L2 format get
 457  *
 458  *****************************************************************************/
 459
 460 static int cpia2_g_fmt_vid_cap(struct file *file, void *fh,
 461                                         struct v4l2_format *f)
 462 {
 463         struct camera_data *cam = video_drvdata(file);
 464
 465         f->fmt.pix.width = cam->width;
 466         f->fmt.pix.height = cam->height;
 467         f->fmt.pix.pixelformat = cam->pixelformat;
 468         f->fmt.pix.field = V4L2_FIELD_NONE;
 469         f->fmt.pix.bytesperline = 0;
 470         f->fmt.pix.sizeimage = cam->frame_size;
 471         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 472         f->fmt.pix.priv = 0;
 473
 474         return 0;
 475 }
 476
 477 /******************************************************************************
 478  *
 479  *  ioctl_cropcap
 480  *
 481  *  V4L2 query cropping capabilities
 482  *  NOTE: cropping is currently disabled
 483  *
 484  *****************************************************************************/
 485
 486 static int cpia2_cropcap(struct file *file, void *fh, struct v4l2_cropcap *c)
 487 {
 488         struct camera_data *cam = video_drvdata(file);
 489
 490         if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 491                return -EINVAL;
 492
 493         c->bounds.left = 0;
 494         c->bounds.top = 0;
 495         c->bounds.width = cam->width;
 496         c->bounds.height = cam->height;
 497         c->defrect.left = 0;
 498         c->defrect.top = 0;
 499         c->defrect.width = cam->width;
 500         c->defrect.height = cam->height;
 501         c->pixelaspect.numerator = 1;
 502         c->pixelaspect.denominator = 1;
 503
 504         return 0;
 505 }
 506
 507 struct framerate_info {
 508         int value;
 509         struct v4l2_fract period;
 510 };
 511
 512 static const struct framerate_info framerate_controls[] = {
 513         { CPIA2_VP_FRAMERATE_6_25, { 4, 25 } },
 514         { CPIA2_VP_FRAMERATE_7_5,  { 2, 15 } },
 515         { CPIA2_VP_FRAMERATE_12_5, { 2, 25 } },
 516         { CPIA2_VP_FRAMERATE_15,   { 1, 15 } },
 517         { CPIA2_VP_FRAMERATE_25,   { 1, 25 } },
 518         { CPIA2_VP_FRAMERATE_30,   { 1, 30 } },
 519 };
 520
 521 static int cpia2_g_parm(struct file *file, void *fh, struct v4l2_streamparm *p)
 522 {
 523         struct camera_data *cam = video_drvdata(file);
 524         struct v4l2_captureparm *cap = &p->parm.capture;
 525         int i;
 526
 527         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 528                 return -EINVAL;
 529
 530         cap->capability = V4L2_CAP_TIMEPERFRAME;
 531         cap->readbuffers = cam->num_frames;
 532         for (i = 0; i < ARRAY_SIZE(framerate_controls); i++)
 533                 if (cam->params.vp_params.frame_rate == framerate_controls[i].value) {
 534                         cap->timeperframe = framerate_controls[i].period;
 535                         break;
 536                 }
 537         return 0;
 538 }
 539
 540 static int cpia2_s_parm(struct file *file, void *fh, struct v4l2_streamparm *p)
 541 {
 542         struct camera_data *cam = video_drvdata(file);
 543         struct v4l2_captureparm *cap = &p->parm.capture;
 544         struct v4l2_fract tpf = cap->timeperframe;
 545         int max = ARRAY_SIZE(framerate_controls) - 1;
 546         int ret;
 547         int i;
 548
 549         ret = cpia2_g_parm(file, fh, p);
 550         if (ret || !tpf.denominator || !tpf.numerator)
 551                 return ret;
 552
 553         /* Maximum 15 fps for this model */
 554         if (cam->params.pnp_id.device_type == DEVICE_STV_672 &&
 555             cam->params.version.sensor_flags == CPIA2_VP_SENSOR_FLAGS_500)
 556                 max -= 2;
 557         for (i = 0; i <= max; i++) {
 558                 struct v4l2_fract f1 = tpf;
 559                 struct v4l2_fract f2 = framerate_controls[i].period;
 560
 561                 f1.numerator *= f2.denominator;
 562                 f2.numerator *= f1.denominator;
 563                 if (f1.numerator >= f2.numerator)
 564                         break;
 565         }
 566         if (i > max)
 567                 i = max;
 568         cap->timeperframe = framerate_controls[i].period;
 569         return cpia2_set_fps(cam, framerate_controls[i].value);
 570 }
 571
 572 static const struct {
 573         u32 width;
 574         u32 height;
 575 } cpia2_framesizes[] = {
 576         { 640, 480 },
 577         { 352, 288 },
 578         { 320, 240 },
 579         { 288, 216 },
 580         { 256, 192 },
 581         { 224, 168 },
 582         { 192, 144 },
 583         { 176, 144 },
 584 };
 585
 586 static int cpia2_enum_framesizes(struct file *file, void *fh,
 587                                          struct v4l2_frmsizeenum *fsize)
 588 {
 589
 590         if (fsize->pixel_format != V4L2_PIX_FMT_MJPEG &&
 591             fsize->pixel_format != V4L2_PIX_FMT_JPEG)
 592                 return -EINVAL;
 593         if (fsize->index >= ARRAY_SIZE(cpia2_framesizes))
 594                 return -EINVAL;
 595         fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
 596         fsize->discrete.width = cpia2_framesizes[fsize->index].width;
 597         fsize->discrete.height = cpia2_framesizes[fsize->index].height;
 598
 599         return 0;
 600 }
 601
 602 static int cpia2_enum_frameintervals(struct file *file, void *fh,
 603                                            struct v4l2_frmivalenum *fival)
 604 {
 605         struct camera_data *cam = video_drvdata(file);
 606         int max = ARRAY_SIZE(framerate_controls) - 1;
 607         int i;
 608
 609         if (fival->pixel_format != V4L2_PIX_FMT_MJPEG &&
 610             fival->pixel_format != V4L2_PIX_FMT_JPEG)
 611                 return -EINVAL;
 612
 613         /* Maximum 15 fps for this model */
 614         if (cam->params.pnp_id.device_type == DEVICE_STV_672 &&
 615             cam->params.version.sensor_flags == CPIA2_VP_SENSOR_FLAGS_500)
 616                 max -= 2;
 617         if (fival->index > max)
 618                 return -EINVAL;
 619         for (i = 0; i < ARRAY_SIZE(cpia2_framesizes); i++)
 620                 if (fival->width == cpia2_framesizes[i].width &&
 621                     fival->height == cpia2_framesizes[i].height)
 622                         break;
 623         if (i == ARRAY_SIZE(cpia2_framesizes))
 624                 return -EINVAL;
 625         fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
 626         fival->discrete = framerate_controls[fival->index].period;
 627         return 0;
 628 }
 629
 630 /******************************************************************************
 631  *
 632  *  ioctl_s_ctrl
 633  *
 634  *  V4L2 set the value of a control variable
 635  *
 636  *****************************************************************************/
 637
 638 static int cpia2_s_ctrl(struct v4l2_ctrl *ctrl)
 639 {
 640         struct camera_data *cam =
 641                 container_of(ctrl->handler, struct camera_data, hdl);
 642         static const int flicker_table[] = {
 643                 NEVER_FLICKER,
 644                 FLICKER_50,
 645                 FLICKER_60,
 646         };
 647
 648         DBG("Set control id:%d, value:%d\n", ctrl->id, ctrl->val);
 649
 650         switch (ctrl->id) {
 651         case V4L2_CID_BRIGHTNESS:
 652                 cpia2_set_brightness(cam, ctrl->val);
 653                 break;
 654         case V4L2_CID_CONTRAST:
 655                 cpia2_set_contrast(cam, ctrl->val);
 656                 break;
 657         case V4L2_CID_SATURATION:
 658                 cpia2_set_saturation(cam, ctrl->val);
 659                 break;
 660         case V4L2_CID_HFLIP:
 661                 cpia2_set_property_mirror(cam, ctrl->val);
 662                 break;
 663         case V4L2_CID_VFLIP:
 664                 cpia2_set_property_flip(cam, ctrl->val);
 665                 break;
 666         case V4L2_CID_POWER_LINE_FREQUENCY:
 667                 return cpia2_set_flicker_mode(cam, flicker_table[ctrl->val]);
 668         case V4L2_CID_ILLUMINATORS_1:
 669                 return cpia2_set_gpio(cam, (cam->top_light->val << 6) |
 670                                            (cam->bottom_light->val << 7));
 671         case V4L2_CID_JPEG_ACTIVE_MARKER:
 672                 cam->params.compression.inhibit_htables =
 673                         !(ctrl->val & V4L2_JPEG_ACTIVE_MARKER_DHT);
 674                 break;
 675         case V4L2_CID_JPEG_COMPRESSION_QUALITY:
 676                 cam->params.vc_params.quality = ctrl->val;
 677                 break;
 678         case CPIA2_CID_USB_ALT:
 679                 cam->params.camera_state.stream_mode = ctrl->val;
 680                 break;
 681         default:
 682                 return -EINVAL;
 683         }
 684
 685         return 0;
 686 }
 687
 688 /******************************************************************************
 689  *
 690  *  ioctl_g_jpegcomp
 691  *
 692  *  V4L2 get the JPEG compression parameters
 693  *
 694  *****************************************************************************/
 695
 696 static int cpia2_g_jpegcomp(struct file *file, void *fh, struct v4l2_jpegcompression *parms)
 697 {
 698         struct camera_data *cam = video_drvdata(file);
 699
 700         memset(parms, 0, sizeof(*parms));
 701
 702         parms->quality = 80; // TODO: Can this be made meaningful?
 703
 704         parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI;
 705         if(!cam->params.compression.inhibit_htables) {
 706                 parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT;
 707         }
 708
 709         parms->APPn = cam->APPn;
 710         parms->APP_len = cam->APP_len;
 711         if(cam->APP_len > 0) {
 712                 memcpy(parms->APP_data, cam->APP_data, cam->APP_len);
 713                 parms->jpeg_markers |= V4L2_JPEG_MARKER_APP;
 714         }
 715
 716         parms->COM_len = cam->COM_len;
 717         if(cam->COM_len > 0) {
 718                 memcpy(parms->COM_data, cam->COM_data, cam->COM_len);
 719                 parms->jpeg_markers |= JPEG_MARKER_COM;
 720         }
 721
 722         DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n",
 723             parms->APP_len, parms->COM_len);
 724
 725         return 0;
 726 }
 727
 728 /******************************************************************************
 729  *
 730  *  ioctl_s_jpegcomp
 731  *
 732  *  V4L2 set the JPEG compression parameters
 733  *  NOTE: quality and some jpeg_markers are ignored.
 734  *
 735  *****************************************************************************/
 736
 737 static int cpia2_s_jpegcomp(struct file *file, void *fh,
 738                 const struct v4l2_jpegcompression *parms)
 739 {
 740         struct camera_data *cam = video_drvdata(file);
 741
 742         DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n",
 743             parms->APP_len, parms->COM_len);
 744
 745         cam->params.compression.inhibit_htables =
 746                 !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
 747
 748         if(parms->APP_len != 0) {
 749                 if(parms->APP_len > 0 &&
 750                    parms->APP_len <= sizeof(cam->APP_data) &&
 751                    parms->APPn >= 0 && parms->APPn <= 15) {
 752                         cam->APPn = parms->APPn;
 753                         cam->APP_len = parms->APP_len;
 754                         memcpy(cam->APP_data, parms->APP_data, parms->APP_len);
 755                 } else {
 756                         LOG("Bad APPn Params n=%d len=%d\n",
 757                             parms->APPn, parms->APP_len);
 758                         return -EINVAL;
 759                 }
 760         } else {
 761                 cam->APP_len = 0;
 762         }
 763
 764         if(parms->COM_len != 0) {
 765                 if(parms->COM_len > 0 &&
 766                    parms->COM_len <= sizeof(cam->COM_data)) {
 767                         cam->COM_len = parms->COM_len;
 768                         memcpy(cam->COM_data, parms->COM_data, parms->COM_len);
 769                 } else {
 770                         LOG("Bad COM_len=%d\n", parms->COM_len);
 771                         return -EINVAL;
 772                 }
 773         }
 774
 775         return 0;
 776 }
 777
 778 /******************************************************************************
 779  *
 780  *  ioctl_reqbufs
 781  *
 782  *  V4L2 Initiate memory mapping.
 783  *  NOTE: The user's request is ignored. For now the buffers are fixed.
 784  *
 785  *****************************************************************************/
 786
 787 static int cpia2_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *req)
 788 {
 789         struct camera_data *cam = video_drvdata(file);
 790
 791         if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 792            req->memory != V4L2_MEMORY_MMAP)
 793                 return -EINVAL;
 794
 795         DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames);
 796         req->count = cam->num_frames;
 797         memset(&req->reserved, 0, sizeof(req->reserved));
 798
 799         return 0;
 800 }
 801
 802 /******************************************************************************
 803  *
 804  *  ioctl_querybuf
 805  *
 806  *  V4L2 Query memory buffer status.
 807  *
 808  *****************************************************************************/
 809
 810 static int cpia2_querybuf(struct file *file, void *fh, struct v4l2_buffer *buf)
 811 {
 812         struct camera_data *cam = video_drvdata(file);
 813
 814         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 815            buf->index > cam->num_frames)
 816                 return -EINVAL;
 817
 818         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
 819         buf->length = cam->frame_size;
 820
 821         buf->memory = V4L2_MEMORY_MMAP;
 822
 823         if(cam->mmapped)
 824                 buf->flags = V4L2_BUF_FLAG_MAPPED;
 825         else
 826                 buf->flags = 0;
 827
 828         buf->flags |= V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 829
 830         switch (cam->buffers[buf->index].status) {
 831         case FRAME_EMPTY:
 832         case FRAME_ERROR:
 833         case FRAME_READING:
 834                 buf->bytesused = 0;
 835                 buf->flags = V4L2_BUF_FLAG_QUEUED;
 836                 break;
 837         case FRAME_READY:
 838                 buf->bytesused = cam->buffers[buf->index].length;
 839                 buf->timestamp = cam->buffers[buf->index].timestamp;
 840                 buf->sequence = cam->buffers[buf->index].seq;
 841                 buf->flags = V4L2_BUF_FLAG_DONE;
 842                 break;
 843         }
 844
 845         DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n",
 846              buf->index, buf->m.offset, buf->flags, buf->sequence,
 847              buf->bytesused);
 848
 849         return 0;
 850 }
 851
 852 /******************************************************************************
 853  *
 854  *  ioctl_qbuf
 855  *
 856  *  V4L2 User is freeing buffer
 857  *
 858  *****************************************************************************/
 859
 860 static int cpia2_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
 861 {
 862         struct camera_data *cam = video_drvdata(file);
 863
 864         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 865            buf->memory != V4L2_MEMORY_MMAP ||
 866            buf->index > cam->num_frames)
 867                 return -EINVAL;
 868
 869         DBG("QBUF #%d\n", buf->index);
 870
 871         if(cam->buffers[buf->index].status == FRAME_READY)
 872                 cam->buffers[buf->index].status = FRAME_EMPTY;
 873
 874         return 0;
 875 }
 876
 877 /******************************************************************************
 878  *
 879  *  find_earliest_filled_buffer
 880  *
 881  *  Helper for ioctl_dqbuf. Find the next ready buffer.
 882  *
 883  *****************************************************************************/
 884
 885 static int find_earliest_filled_buffer(struct camera_data *cam)
 886 {
 887         int i;
 888         int found = -1;
 889         for (i=0; i<cam->num_frames; i++) {
 890                 if(cam->buffers[i].status == FRAME_READY) {
 891                         if(found < 0) {
 892                                 found = i;
 893                         } else {
 894                                 /* find which buffer is earlier */
 895                                 struct timeval *tv1, *tv2;
 896                                 tv1 = &cam->buffers[i].timestamp;
 897                                 tv2 = &cam->buffers[found].timestamp;
 898                                 if(tv1->tv_sec < tv2->tv_sec ||
 899                                    (tv1->tv_sec == tv2->tv_sec &&
 900                                     tv1->tv_usec < tv2->tv_usec))
 901                                         found = i;
 902                         }
 903                 }
 904         }
 905         return found;
 906 }
 907
 908 /******************************************************************************
 909  *
 910  *  ioctl_dqbuf
 911  *
 912  *  V4L2 User is asking for a filled buffer.
 913  *
 914  *****************************************************************************/
 915
 916 static int cpia2_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
 917 {
 918         struct camera_data *cam = video_drvdata(file);
 919         int frame;
 920
 921         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 922            buf->memory != V4L2_MEMORY_MMAP)
 923                 return -EINVAL;
 924
 925         frame = find_earliest_filled_buffer(cam);
 926
 927         if(frame < 0 && file->f_flags&O_NONBLOCK)
 928                 return -EAGAIN;
 929
 930         if(frame < 0) {
 931                 /* Wait for a frame to become available */
 932                 struct framebuf *cb=cam->curbuff;
 933                 mutex_unlock(&cam->v4l2_lock);
 934                 wait_event_interruptible(cam->wq_stream,
 935                                          !video_is_registered(&cam->vdev) ||
 936                                          (cb=cam->curbuff)->status == FRAME_READY);
 937                 mutex_lock(&cam->v4l2_lock);
 938                 if (signal_pending(current))
 939                         return -ERESTARTSYS;
 940                 if (!video_is_registered(&cam->vdev))
 941                         return -ENOTTY;
 942                 frame = cb->num;
 943         }
 944
 945
 946         buf->index = frame;
 947         buf->bytesused = cam->buffers[buf->index].length;
 948         buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE
 949                 | V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 950         buf->field = V4L2_FIELD_NONE;
 951         buf->timestamp = cam->buffers[buf->index].timestamp;
 952         buf->sequence = cam->buffers[buf->index].seq;
 953         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
 954         buf->length = cam->frame_size;
 955         buf->reserved2 = 0;
 956         buf->reserved = 0;
 957         memset(&buf->timecode, 0, sizeof(buf->timecode));
 958
 959         DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index,
 960             cam->buffers[buf->index].status, buf->sequence, buf->bytesused);
 961
 962         return 0;
 963 }
 964
 965 static int cpia2_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 966 {
 967         struct camera_data *cam = video_drvdata(file);
 968         int ret = -EINVAL;
 969
 970         DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming);
 971         if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 972                 return -EINVAL;
 973
 974         if (!cam->streaming) {
 975                 ret = cpia2_usb_stream_start(cam,
 976                                 cam->params.camera_state.stream_mode);
 977                 if (!ret)
 978                         v4l2_ctrl_grab(cam->usb_alt, true);
 979         }
 980         return ret;
 981 }
 982
 983 static int cpia2_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
 984 {
 985         struct camera_data *cam = video_drvdata(file);
 986         int ret = -EINVAL;
 987
 988         DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming);
 989         if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 990                 return -EINVAL;
 991
 992         if (cam->streaming) {
 993                 ret = cpia2_usb_stream_stop(cam);
 994                 if (!ret)
 995                         v4l2_ctrl_grab(cam->usb_alt, false);
 996         }
 997         return ret;
 998 }
 999
1000 /******************************************************************************
1001  *
1002  *  cpia2_mmap
1003  *
1004  *****************************************************************************/
1005 static int cpia2_mmap(struct file *file, struct vm_area_struct *area)
1006 {
1007         struct camera_data *cam = video_drvdata(file);
1008         int retval;
1009
1010         if (mutex_lock_interruptible(&cam->v4l2_lock))
1011                 return -ERESTARTSYS;
1012         retval = cpia2_remap_buffer(cam, area);
1013
1014         if(!retval)
1015                 cam->stream_fh = file->private_data;
1016         mutex_unlock(&cam->v4l2_lock);
1017         return retval;
1018 }
1019
1020 /******************************************************************************
1021  *
1022  *  reset_camera_struct_v4l
1023  *
1024  *  Sets all values to the defaults
1025  *****************************************************************************/
1026 static void reset_camera_struct_v4l(struct camera_data *cam)
1027 {
1028         cam->width = cam->params.roi.width;
1029         cam->height = cam->params.roi.height;
1030
1031         cam->frame_size = buffer_size;
1032         cam->num_frames = num_buffers;
1033
1034         /* Flicker modes */
1035         cam->params.flicker_control.flicker_mode_req = flicker_mode;
1036
1037         /* stream modes */
1038         cam->params.camera_state.stream_mode = alternate;
1039
1040         cam->pixelformat = V4L2_PIX_FMT_JPEG;
1041 }
1042
1043 static const struct v4l2_ioctl_ops cpia2_ioctl_ops = {
1044         .vidioc_querycap                    = cpia2_querycap,
1045         .vidioc_enum_input                  = cpia2_enum_input,
1046         .vidioc_g_input                     = cpia2_g_input,
1047         .vidioc_s_input                     = cpia2_s_input,
1048         .vidioc_enum_fmt_vid_cap            = cpia2_enum_fmt_vid_cap,
1049         .vidioc_g_fmt_vid_cap               = cpia2_g_fmt_vid_cap,
1050         .vidioc_s_fmt_vid_cap               = cpia2_s_fmt_vid_cap,
1051         .vidioc_try_fmt_vid_cap             = cpia2_try_fmt_vid_cap,
1052         .vidioc_g_jpegcomp                  = cpia2_g_jpegcomp,
1053         .vidioc_s_jpegcomp                  = cpia2_s_jpegcomp,
1054         .vidioc_cropcap                     = cpia2_cropcap,
1055         .vidioc_reqbufs                     = cpia2_reqbufs,
1056         .vidioc_querybuf                    = cpia2_querybuf,
1057         .vidioc_qbuf                        = cpia2_qbuf,
1058         .vidioc_dqbuf                       = cpia2_dqbuf,
1059         .vidioc_streamon                    = cpia2_streamon,
1060         .vidioc_streamoff                   = cpia2_streamoff,
1061         .vidioc_s_parm                      = cpia2_s_parm,
1062         .vidioc_g_parm                      = cpia2_g_parm,
1063         .vidioc_enum_framesizes             = cpia2_enum_framesizes,
1064         .vidioc_enum_frameintervals         = cpia2_enum_frameintervals,
1065         .vidioc_subscribe_event             = v4l2_ctrl_subscribe_event,
1066         .vidioc_unsubscribe_event           = v4l2_event_unsubscribe,
1067 };
1068
1069 /***
1070  * The v4l video device structure initialized for this device
1071  ***/
1072 static const struct v4l2_file_operations cpia2_fops = {
1073         .owner          = THIS_MODULE,
1074         .open           = cpia2_open,
1075         .release        = cpia2_close,
1076         .read           = cpia2_v4l_read,
1077         .poll           = cpia2_v4l_poll,
1078         .unlocked_ioctl = video_ioctl2,
1079         .mmap           = cpia2_mmap,
1080 };
1081
1082 static struct video_device cpia2_template = {
1083         /* I could not find any place for the old .initialize initializer?? */
1084         .name =         "CPiA2 Camera",
1085         .fops =         &cpia2_fops,
1086         .ioctl_ops =    &cpia2_ioctl_ops,
1087         .release =      video_device_release_empty,
1088 };
1089
1090 void cpia2_camera_release(struct v4l2_device *v4l2_dev)
1091 {
1092         struct camera_data *cam =
1093                 container_of(v4l2_dev, struct camera_data, v4l2_dev);
1094
1095         v4l2_ctrl_handler_free(&cam->hdl);
1096         v4l2_device_unregister(&cam->v4l2_dev);
1097         kfree(cam);
1098 }
1099
1100 static const struct v4l2_ctrl_ops cpia2_ctrl_ops = {
1101         .s_ctrl = cpia2_s_ctrl,
1102 };
1103
1104 /******************************************************************************
1105  *
1106  *  cpia2_register_camera
1107  *
1108  *****************************************************************************/
1109 int cpia2_register_camera(struct camera_data *cam)
1110 {
1111         struct v4l2_ctrl_handler *hdl = &cam->hdl;
1112         struct v4l2_ctrl_config cpia2_usb_alt = {
1113                 .ops = &cpia2_ctrl_ops,
1114                 .id = CPIA2_CID_USB_ALT,
1115                 .name = "USB Alternate",
1116                 .type = V4L2_CTRL_TYPE_INTEGER,
1117                 .min = USBIF_ISO_1,
1118                 .max = USBIF_ISO_6,
1119                 .step = 1,
1120         };
1121         int ret;
1122
1123         v4l2_ctrl_handler_init(hdl, 12);
1124         v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1125                         V4L2_CID_BRIGHTNESS,
1126                         cam->params.pnp_id.device_type == DEVICE_STV_672 ? 1 : 0,
1127                         255, 1, DEFAULT_BRIGHTNESS);
1128         v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1129                         V4L2_CID_CONTRAST, 0, 255, 1, DEFAULT_CONTRAST);
1130         v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1131                         V4L2_CID_SATURATION, 0, 255, 1, DEFAULT_SATURATION);
1132         v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1133                         V4L2_CID_HFLIP, 0, 1, 1, 0);
1134         v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1135                         V4L2_CID_JPEG_ACTIVE_MARKER, 0,
1136                         V4L2_JPEG_ACTIVE_MARKER_DHT, 0,
1137                         V4L2_JPEG_ACTIVE_MARKER_DHT);
1138         v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1139                         V4L2_CID_JPEG_COMPRESSION_QUALITY, 1,
1140                         100, 1, 100);
1141         cpia2_usb_alt.def = alternate;
1142         cam->usb_alt = v4l2_ctrl_new_custom(hdl, &cpia2_usb_alt, NULL);
1143         /* VP5 Only */
1144         if (cam->params.pnp_id.device_type != DEVICE_STV_672)
1145                 v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1146                         V4L2_CID_VFLIP, 0, 1, 1, 0);
1147         /* Flicker control only valid for 672 */
1148         if (cam->params.pnp_id.device_type == DEVICE_STV_672)
1149                 v4l2_ctrl_new_std_menu(hdl, &cpia2_ctrl_ops,
1150                         V4L2_CID_POWER_LINE_FREQUENCY,
1151                         V4L2_CID_POWER_LINE_FREQUENCY_60HZ, 0, 0);
1152         /* Light control only valid for the QX5 Microscope */
1153         if (cam->params.pnp_id.product == 0x151) {
1154                 cam->top_light = v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1155                                 V4L2_CID_ILLUMINATORS_1, 0, 1, 1, 0);
1156                 cam->bottom_light = v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1157                                 V4L2_CID_ILLUMINATORS_2, 0, 1, 1, 0);
1158                 v4l2_ctrl_cluster(2, &cam->top_light);
1159         }
1160
1161         if (hdl->error) {
1162                 ret = hdl->error;
1163                 v4l2_ctrl_handler_free(hdl);
1164                 return ret;
1165         }
1166
1167         cam->vdev = cpia2_template;
1168         video_set_drvdata(&cam->vdev, cam);
1169         cam->vdev.lock = &cam->v4l2_lock;
1170         cam->vdev.ctrl_handler = hdl;
1171         cam->vdev.v4l2_dev = &cam->v4l2_dev;
1172
1173         reset_camera_struct_v4l(cam);
1174
1175         /* register v4l device */
1176         if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
1177                 ERR("video_register_device failed\n");
1178                 return -ENODEV;
1179         }
1180
1181         return 0;
1182 }
1183
1184 /******************************************************************************
1185  *
1186  *  cpia2_unregister_camera
1187  *
1188  *****************************************************************************/
1189 void cpia2_unregister_camera(struct camera_data *cam)
1190 {
1191         video_unregister_device(&cam->vdev);
1192 }
1193
1194 /******************************************************************************
1195  *
1196  *  check_parameters
1197  *
1198  *  Make sure that all user-supplied parameters are sensible
1199  *****************************************************************************/
1200 static void __init check_parameters(void)
1201 {
1202         if(buffer_size < PAGE_SIZE) {
1203                 buffer_size = PAGE_SIZE;
1204                 LOG("buffer_size too small, setting to %d\n", buffer_size);
1205         } else if(buffer_size > 1024*1024) {
1206                 /* arbitrary upper limiit */
1207                 buffer_size = 1024*1024;
1208                 LOG("buffer_size ridiculously large, setting to %d\n",
1209                     buffer_size);
1210         } else {
1211                 buffer_size += PAGE_SIZE-1;
1212                 buffer_size &= ~(PAGE_SIZE-1);
1213         }
1214
1215         if(num_buffers < 1) {
1216                 num_buffers = 1;
1217                 LOG("num_buffers too small, setting to %d\n", num_buffers);
1218         } else if(num_buffers > VIDEO_MAX_FRAME) {
1219                 num_buffers = VIDEO_MAX_FRAME;
1220                 LOG("num_buffers too large, setting to %d\n", num_buffers);
1221         }
1222
1223         if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) {
1224                 alternate = DEFAULT_ALT;
1225                 LOG("alternate specified is invalid, using %d\n", alternate);
1226         }
1227
1228         if (flicker_mode != 0 && flicker_mode != FLICKER_50 && flicker_mode != FLICKER_60) {
1229                 flicker_mode = 0;
1230                 LOG("Flicker mode specified is invalid, using %d\n",
1231                     flicker_mode);
1232         }
1233
1234         DBG("Using %d buffers, each %d bytes, alternate=%d\n",
1235             num_buffers, buffer_size, alternate);
1236 }
1237
1238 /************   Module Stuff ***************/
1239
1240
1241 /******************************************************************************
1242  *
1243  * cpia2_init/module_init
1244  *
1245  *****************************************************************************/
1246 static int __init cpia2_init(void)
1247 {
1248         LOG("%s v%s\n",
1249             ABOUT, CPIA_VERSION);
1250         check_parameters();
1251         cpia2_usb_init();
1252         return 0;
1253 }
1254
1255
1256 /******************************************************************************
1257  *
1258  * cpia2_exit/module_exit
1259  *
1260  *****************************************************************************/
1261 static void __exit cpia2_exit(void)
1262 {
1263         cpia2_usb_cleanup();
1264         schedule_timeout(2 * HZ);
1265 }
1266
1267 module_init(cpia2_init);
1268 module_exit(cpia2_exit);