git.oblomov.eu Git - linux-2.6/blob - drivers/media/video/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 #include <linux/version.h>
  33
  34
  35 #include <linux/module.h>
  36 #include <linux/time.h>
  37 #include <linux/sched.h>
  38 #include <linux/slab.h>
  39 #include <linux/init.h>
  40 #include <media/v4l2-ioctl.h>
  41
  42 #include "cpia2.h"
  43 #include "cpia2dev.h"
  44
  45
  46 //#define _CPIA2_DEBUG_
  47
  48 #define MAKE_STRING_1(x)        #x
  49 #define MAKE_STRING(x)  MAKE_STRING_1(x)
  50
  51 static int video_nr = -1;
  52 module_param(video_nr, int, 0);
  53 MODULE_PARM_DESC(video_nr,"video device to register (0=/dev/video0, etc)");
  54
  55 static int buffer_size = 68*1024;
  56 module_param(buffer_size, int, 0);
  57 MODULE_PARM_DESC(buffer_size, "Size for each frame buffer in bytes (default 68k)");
  58
  59 static int num_buffers = 3;
  60 module_param(num_buffers, int, 0);
  61 MODULE_PARM_DESC(num_buffers, "Number of frame buffers (1-"
  62                  MAKE_STRING(VIDEO_MAX_FRAME) ", default 3)");
  63
  64 static int alternate = DEFAULT_ALT;
  65 module_param(alternate, int, 0);
  66 MODULE_PARM_DESC(alternate, "USB Alternate (" MAKE_STRING(USBIF_ISO_1) "-"
  67                  MAKE_STRING(USBIF_ISO_6) ", default "
  68                  MAKE_STRING(DEFAULT_ALT) ")");
  69
  70 static int flicker_freq = 60;
  71 module_param(flicker_freq, int, 0);
  72 MODULE_PARM_DESC(flicker_freq, "Flicker frequency (" MAKE_STRING(50) "or"
  73                  MAKE_STRING(60) ", default "
  74                  MAKE_STRING(60) ")");
  75
  76 static int flicker_mode = NEVER_FLICKER;
  77 module_param(flicker_mode, int, 0);
  78 MODULE_PARM_DESC(flicker_mode,
  79                  "Flicker supression (" MAKE_STRING(NEVER_FLICKER) "or"
  80                  MAKE_STRING(ANTI_FLICKER_ON) ", default "
  81                  MAKE_STRING(NEVER_FLICKER) ")");
  82
  83 MODULE_AUTHOR("Steve Miller (STMicroelectronics) <steve.miller@st.com>");
  84 MODULE_DESCRIPTION("V4L-driver for STMicroelectronics CPiA2 based cameras");
  85 MODULE_SUPPORTED_DEVICE("video");
  86 MODULE_LICENSE("GPL");
  87
  88 #define ABOUT "V4L-Driver for Vision CPiA2 based cameras"
  89
  90 struct control_menu_info {
  91         int value;
  92         char name[32];
  93 };
  94
  95 static struct control_menu_info framerate_controls[] =
  96 {
  97         { CPIA2_VP_FRAMERATE_6_25, "6.25 fps" },
  98         { CPIA2_VP_FRAMERATE_7_5,  "7.5 fps"  },
  99         { CPIA2_VP_FRAMERATE_12_5, "12.5 fps" },
 100         { CPIA2_VP_FRAMERATE_15,   "15 fps"   },
 101         { CPIA2_VP_FRAMERATE_25,   "25 fps"   },
 102         { CPIA2_VP_FRAMERATE_30,   "30 fps"   },
 103 };
 104 #define NUM_FRAMERATE_CONTROLS (ARRAY_SIZE(framerate_controls))
 105
 106 static struct control_menu_info flicker_controls[] =
 107 {
 108         { NEVER_FLICKER, "Off" },
 109         { FLICKER_50,    "50 Hz" },
 110         { FLICKER_60,    "60 Hz"  },
 111 };
 112 #define NUM_FLICKER_CONTROLS (ARRAY_SIZE(flicker_controls))
 113
 114 static struct control_menu_info lights_controls[] =
 115 {
 116         { 0,   "Off" },
 117         { 64,  "Top" },
 118         { 128, "Bottom"  },
 119         { 192, "Both"  },
 120 };
 121 #define NUM_LIGHTS_CONTROLS (ARRAY_SIZE(lights_controls))
 122 #define GPIO_LIGHTS_MASK 192
 123
 124 static struct v4l2_queryctrl controls[] = {
 125         {
 126                 .id            = V4L2_CID_BRIGHTNESS,
 127                 .type          = V4L2_CTRL_TYPE_INTEGER,
 128                 .name          = "Brightness",
 129                 .minimum       = 0,
 130                 .maximum       = 255,
 131                 .step          = 1,
 132                 .default_value = DEFAULT_BRIGHTNESS,
 133         },
 134         {
 135                 .id            = V4L2_CID_CONTRAST,
 136                 .type          = V4L2_CTRL_TYPE_INTEGER,
 137                 .name          = "Contrast",
 138                 .minimum       = 0,
 139                 .maximum       = 255,
 140                 .step          = 1,
 141                 .default_value = DEFAULT_CONTRAST,
 142         },
 143         {
 144                 .id            = V4L2_CID_SATURATION,
 145                 .type          = V4L2_CTRL_TYPE_INTEGER,
 146                 .name          = "Saturation",
 147                 .minimum       = 0,
 148                 .maximum       = 255,
 149                 .step          = 1,
 150                 .default_value = DEFAULT_SATURATION,
 151         },
 152         {
 153                 .id            = V4L2_CID_HFLIP,
 154                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
 155                 .name          = "Mirror Horizontally",
 156                 .minimum       = 0,
 157                 .maximum       = 1,
 158                 .step          = 1,
 159                 .default_value = 0,
 160         },
 161         {
 162                 .id            = V4L2_CID_VFLIP,
 163                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
 164                 .name          = "Flip Vertically",
 165                 .minimum       = 0,
 166                 .maximum       = 1,
 167                 .step          = 1,
 168                 .default_value = 0,
 169         },
 170         {
 171                 .id            = CPIA2_CID_TARGET_KB,
 172                 .type          = V4L2_CTRL_TYPE_INTEGER,
 173                 .name          = "Target KB",
 174                 .minimum       = 0,
 175                 .maximum       = 255,
 176                 .step          = 1,
 177                 .default_value = DEFAULT_TARGET_KB,
 178         },
 179         {
 180                 .id            = CPIA2_CID_GPIO,
 181                 .type          = V4L2_CTRL_TYPE_INTEGER,
 182                 .name          = "GPIO",
 183                 .minimum       = 0,
 184                 .maximum       = 255,
 185                 .step          = 1,
 186                 .default_value = 0,
 187         },
 188         {
 189                 .id            = CPIA2_CID_FLICKER_MODE,
 190                 .type          = V4L2_CTRL_TYPE_MENU,
 191                 .name          = "Flicker Reduction",
 192                 .minimum       = 0,
 193                 .maximum       = NUM_FLICKER_CONTROLS-1,
 194                 .step          = 1,
 195                 .default_value = 0,
 196         },
 197         {
 198                 .id            = CPIA2_CID_FRAMERATE,
 199                 .type          = V4L2_CTRL_TYPE_MENU,
 200                 .name          = "Framerate",
 201                 .minimum       = 0,
 202                 .maximum       = NUM_FRAMERATE_CONTROLS-1,
 203                 .step          = 1,
 204                 .default_value = NUM_FRAMERATE_CONTROLS-1,
 205         },
 206         {
 207                 .id            = CPIA2_CID_USB_ALT,
 208                 .type          = V4L2_CTRL_TYPE_INTEGER,
 209                 .name          = "USB Alternate",
 210                 .minimum       = USBIF_ISO_1,
 211                 .maximum       = USBIF_ISO_6,
 212                 .step          = 1,
 213                 .default_value = DEFAULT_ALT,
 214         },
 215         {
 216                 .id            = CPIA2_CID_LIGHTS,
 217                 .type          = V4L2_CTRL_TYPE_MENU,
 218                 .name          = "Lights",
 219                 .minimum       = 0,
 220                 .maximum       = NUM_LIGHTS_CONTROLS-1,
 221                 .step          = 1,
 222                 .default_value = 0,
 223         },
 224         {
 225                 .id            = CPIA2_CID_RESET_CAMERA,
 226                 .type          = V4L2_CTRL_TYPE_BUTTON,
 227                 .name          = "Reset Camera",
 228                 .minimum       = 0,
 229                 .maximum       = 0,
 230                 .step          = 0,
 231                 .default_value = 0,
 232         },
 233 };
 234 #define NUM_CONTROLS (ARRAY_SIZE(controls))
 235
 236
 237 /******************************************************************************
 238  *
 239  *  cpia2_open
 240  *
 241  *****************************************************************************/
 242 static int cpia2_open(struct file *file)
 243 {
 244         struct camera_data *cam = video_drvdata(file);
 245         int retval = 0;
 246
 247         if (!cam) {
 248                 ERR("Internal error, camera_data not found!\n");
 249                 return -ENODEV;
 250         }
 251
 252         if(mutex_lock_interruptible(&cam->busy_lock))
 253                 return -ERESTARTSYS;
 254
 255         if(!cam->present) {
 256                 retval = -ENODEV;
 257                 goto err_return;
 258         }
 259
 260         if (cam->open_count > 0) {
 261                 goto skip_init;
 262         }
 263
 264         if (cpia2_allocate_buffers(cam)) {
 265                 retval = -ENOMEM;
 266                 goto err_return;
 267         }
 268
 269         /* reset the camera */
 270         if (cpia2_reset_camera(cam) < 0) {
 271                 retval = -EIO;
 272                 goto err_return;
 273         }
 274
 275         cam->APP_len = 0;
 276         cam->COM_len = 0;
 277
 278 skip_init:
 279         {
 280                 struct cpia2_fh *fh = kmalloc(sizeof(*fh),GFP_KERNEL);
 281                 if(!fh) {
 282                         retval = -ENOMEM;
 283                         goto err_return;
 284                 }
 285                 file->private_data = fh;
 286                 fh->prio = V4L2_PRIORITY_UNSET;
 287                 v4l2_prio_open(&cam->prio, &fh->prio);
 288                 fh->mmapped = 0;
 289         }
 290
 291         ++cam->open_count;
 292
 293         cpia2_dbg_dump_registers(cam);
 294
 295 err_return:
 296         mutex_unlock(&cam->busy_lock);
 297         return retval;
 298 }
 299
 300 /******************************************************************************
 301  *
 302  *  cpia2_close
 303  *
 304  *****************************************************************************/
 305 static int cpia2_close(struct file *file)
 306 {
 307         struct video_device *dev = video_devdata(file);
 308         struct camera_data *cam = video_get_drvdata(dev);
 309         struct cpia2_fh *fh = file->private_data;
 310
 311         mutex_lock(&cam->busy_lock);
 312
 313         if (cam->present &&
 314             (cam->open_count == 1
 315              || fh->prio == V4L2_PRIORITY_RECORD
 316             )) {
 317                 cpia2_usb_stream_stop(cam);
 318
 319                 if(cam->open_count == 1) {
 320                         /* save camera state for later open */
 321                         cpia2_save_camera_state(cam);
 322
 323                         cpia2_set_low_power(cam);
 324                         cpia2_free_buffers(cam);
 325                 }
 326         }
 327
 328         {
 329                 if(fh->mmapped)
 330                         cam->mmapped = 0;
 331                 v4l2_prio_close(&cam->prio,&fh->prio);
 332                 file->private_data = NULL;
 333                 kfree(fh);
 334         }
 335
 336         if (--cam->open_count == 0) {
 337                 cpia2_free_buffers(cam);
 338                 if (!cam->present) {
 339                         video_unregister_device(dev);
 340                         mutex_unlock(&cam->busy_lock);
 341                         kfree(cam);
 342                         return 0;
 343                 }
 344         }
 345
 346         mutex_unlock(&cam->busy_lock);
 347
 348         return 0;
 349 }
 350
 351 /******************************************************************************
 352  *
 353  *  cpia2_v4l_read
 354  *
 355  *****************************************************************************/
 356 static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count,
 357                               loff_t *off)
 358 {
 359         struct camera_data *cam = video_drvdata(file);
 360         int noblock = file->f_flags&O_NONBLOCK;
 361
 362         struct cpia2_fh *fh = file->private_data;
 363
 364         if(!cam)
 365                 return -EINVAL;
 366
 367         /* Priority check */
 368         if(fh->prio != V4L2_PRIORITY_RECORD) {
 369                 return -EBUSY;
 370         }
 371
 372         return cpia2_read(cam, buf, count, noblock);
 373 }
 374
 375
 376 /******************************************************************************
 377  *
 378  *  cpia2_v4l_poll
 379  *
 380  *****************************************************************************/
 381 static unsigned int cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait)
 382 {
 383         struct camera_data *cam = video_drvdata(filp);
 384         struct cpia2_fh *fh = filp->private_data;
 385
 386         if(!cam)
 387                 return POLLERR;
 388
 389         /* Priority check */
 390         if(fh->prio != V4L2_PRIORITY_RECORD) {
 391                 return POLLERR;
 392         }
 393
 394         return cpia2_poll(cam, filp, wait);
 395 }
 396
 397
 398 /******************************************************************************
 399  *
 400  *  ioctl_cap_query
 401  *
 402  *****************************************************************************/
 403 static int ioctl_cap_query(void *arg, struct camera_data *cam)
 404 {
 405         struct video_capability *vc;
 406         int retval = 0;
 407         vc = arg;
 408
 409         if (cam->params.pnp_id.product == 0x151)
 410                 strcpy(vc->name, "QX5 Microscope");
 411         else
 412                 strcpy(vc->name, "CPiA2 Camera");
 413
 414         vc->type = VID_TYPE_CAPTURE | VID_TYPE_MJPEG_ENCODER;
 415         vc->channels = 1;
 416         vc->audios = 0;
 417         vc->minwidth = 176;     /* VIDEOSIZE_QCIF */
 418         vc->minheight = 144;
 419         switch (cam->params.version.sensor_flags) {
 420         case CPIA2_VP_SENSOR_FLAGS_500:
 421                 vc->maxwidth = STV_IMAGE_VGA_COLS;
 422                 vc->maxheight = STV_IMAGE_VGA_ROWS;
 423                 break;
 424         case CPIA2_VP_SENSOR_FLAGS_410:
 425                 vc->maxwidth = STV_IMAGE_CIF_COLS;
 426                 vc->maxheight = STV_IMAGE_CIF_ROWS;
 427                 break;
 428         default:
 429                 return -EINVAL;
 430         }
 431
 432         return retval;
 433 }
 434
 435 /******************************************************************************
 436  *
 437  *  ioctl_get_channel
 438  *
 439  *****************************************************************************/
 440 static int ioctl_get_channel(void *arg)
 441 {
 442         int retval = 0;
 443         struct video_channel *v;
 444         v = arg;
 445
 446         if (v->channel != 0)
 447                 return -EINVAL;
 448
 449         v->channel = 0;
 450         strcpy(v->name, "Camera");
 451         v->tuners = 0;
 452         v->flags = 0;
 453         v->type = VIDEO_TYPE_CAMERA;
 454         v->norm = 0;
 455
 456         return retval;
 457 }
 458
 459 /******************************************************************************
 460  *
 461  *  ioctl_set_channel
 462  *
 463  *****************************************************************************/
 464 static int ioctl_set_channel(void *arg)
 465 {
 466         struct video_channel *v;
 467         int retval = 0;
 468         v = arg;
 469
 470         if (retval == 0 && v->channel != 0)
 471                 retval = -EINVAL;
 472
 473         return retval;
 474 }
 475
 476 /******************************************************************************
 477  *
 478  *  ioctl_set_image_prop
 479  *
 480  *****************************************************************************/
 481 static int ioctl_set_image_prop(void *arg, struct camera_data *cam)
 482 {
 483         struct video_picture *vp;
 484         int retval = 0;
 485         vp = arg;
 486
 487         /* brightness, color, contrast need no check 0-65535 */
 488         memcpy(&cam->vp, vp, sizeof(*vp));
 489
 490         /* update cam->params.colorParams */
 491         cam->params.color_params.brightness = vp->brightness / 256;
 492         cam->params.color_params.saturation = vp->colour / 256;
 493         cam->params.color_params.contrast = vp->contrast / 256;
 494
 495         DBG("Requested params: bright 0x%X, sat 0x%X, contrast 0x%X\n",
 496             cam->params.color_params.brightness,
 497             cam->params.color_params.saturation,
 498             cam->params.color_params.contrast);
 499
 500         cpia2_set_color_params(cam);
 501
 502         return retval;
 503 }
 504
 505 static int sync(struct camera_data *cam, int frame_nr)
 506 {
 507         struct framebuf *frame = &cam->buffers[frame_nr];
 508
 509         while (1) {
 510                 if (frame->status == FRAME_READY)
 511                         return 0;
 512
 513                 if (!cam->streaming) {
 514                         frame->status = FRAME_READY;
 515                         frame->length = 0;
 516                         return 0;
 517                 }
 518
 519                 mutex_unlock(&cam->busy_lock);
 520                 wait_event_interruptible(cam->wq_stream,
 521                                          !cam->streaming ||
 522                                          frame->status == FRAME_READY);
 523                 mutex_lock(&cam->busy_lock);
 524                 if (signal_pending(current))
 525                         return -ERESTARTSYS;
 526                 if(!cam->present)
 527                         return -ENOTTY;
 528         }
 529 }
 530
 531 /******************************************************************************
 532  *
 533  *  ioctl_set_window_size
 534  *
 535  *****************************************************************************/
 536 static int ioctl_set_window_size(void *arg, struct camera_data *cam,
 537                                  struct cpia2_fh *fh)
 538 {
 539         /* copy_from_user, check validity, copy to internal structure */
 540         struct video_window *vw;
 541         int frame, err;
 542         vw = arg;
 543
 544         if (vw->clipcount != 0) /* clipping not supported */
 545                 return -EINVAL;
 546
 547         if (vw->clips != NULL)  /* clipping not supported */
 548                 return -EINVAL;
 549
 550         /* Ensure that only this process can change the format. */
 551         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
 552         if(err != 0)
 553                 return err;
 554
 555         cam->pixelformat = V4L2_PIX_FMT_JPEG;
 556
 557         /* Be sure to supply the Huffman tables, this isn't MJPEG */
 558         cam->params.compression.inhibit_htables = 0;
 559
 560         /* we set the video window to something smaller or equal to what
 561          * is requested by the user???
 562          */
 563         DBG("Requested width = %d, height = %d\n", vw->width, vw->height);
 564         if (vw->width != cam->vw.width || vw->height != cam->vw.height) {
 565                 cam->vw.width = vw->width;
 566                 cam->vw.height = vw->height;
 567                 cam->params.roi.width = vw->width;
 568                 cam->params.roi.height = vw->height;
 569                 cpia2_set_format(cam);
 570         }
 571
 572         for (frame = 0; frame < cam->num_frames; ++frame) {
 573                 if (cam->buffers[frame].status == FRAME_READING)
 574                         if ((err = sync(cam, frame)) < 0)
 575                                 return err;
 576
 577                 cam->buffers[frame].status = FRAME_EMPTY;
 578         }
 579
 580         return 0;
 581 }
 582
 583 /******************************************************************************
 584  *
 585  *  ioctl_get_mbuf
 586  *
 587  *****************************************************************************/
 588 static int ioctl_get_mbuf(void *arg, struct camera_data *cam)
 589 {
 590         struct video_mbuf *vm;
 591         int i;
 592         vm = arg;
 593
 594         memset(vm, 0, sizeof(*vm));
 595         vm->size = cam->frame_size*cam->num_frames;
 596         vm->frames = cam->num_frames;
 597         for (i = 0; i < cam->num_frames; i++)
 598                 vm->offsets[i] = cam->frame_size * i;
 599
 600         return 0;
 601 }
 602
 603 /******************************************************************************
 604  *
 605  *  ioctl_mcapture
 606  *
 607  *****************************************************************************/
 608 static int ioctl_mcapture(void *arg, struct camera_data *cam,
 609                           struct cpia2_fh *fh)
 610 {
 611         struct video_mmap *vm;
 612         int video_size, err;
 613         vm = arg;
 614
 615         if (vm->frame < 0 || vm->frame >= cam->num_frames)
 616                 return -EINVAL;
 617
 618         /* set video size */
 619         video_size = cpia2_match_video_size(vm->width, vm->height);
 620         if (cam->video_size < 0) {
 621                 return -EINVAL;
 622         }
 623
 624         /* Ensure that only this process can change the format. */
 625         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
 626         if(err != 0)
 627                 return err;
 628
 629         if (video_size != cam->video_size) {
 630                 cam->video_size = video_size;
 631                 cam->params.roi.width = vm->width;
 632                 cam->params.roi.height = vm->height;
 633                 cpia2_set_format(cam);
 634         }
 635
 636         if (cam->buffers[vm->frame].status == FRAME_READING)
 637                 if ((err=sync(cam, vm->frame)) < 0)
 638                         return err;
 639
 640         cam->buffers[vm->frame].status = FRAME_EMPTY;
 641
 642         return cpia2_usb_stream_start(cam,cam->params.camera_state.stream_mode);
 643 }
 644
 645 /******************************************************************************
 646  *
 647  *  ioctl_sync
 648  *
 649  *****************************************************************************/
 650 static int ioctl_sync(void *arg, struct camera_data *cam)
 651 {
 652         int frame;
 653
 654         frame = *(int*)arg;
 655
 656         if (frame < 0 || frame >= cam->num_frames)
 657                 return -EINVAL;
 658
 659         return sync(cam, frame);
 660 }
 661
 662
 663 /******************************************************************************
 664  *
 665  *  ioctl_set_gpio
 666  *
 667  *****************************************************************************/
 668
 669 static int ioctl_set_gpio(void *arg, struct camera_data *cam)
 670 {
 671         __u32 gpio_val;
 672
 673         gpio_val = *(__u32*) arg;
 674
 675         if (gpio_val &~ 0xFFU)
 676                 return -EINVAL;
 677
 678         return cpia2_set_gpio(cam, (unsigned char)gpio_val);
 679 }
 680
 681 /******************************************************************************
 682  *
 683  *  ioctl_querycap
 684  *
 685  *  V4L2 device capabilities
 686  *
 687  *****************************************************************************/
 688
 689 static int ioctl_querycap(void *arg, struct camera_data *cam)
 690 {
 691         struct v4l2_capability *vc = arg;
 692
 693         memset(vc, 0, sizeof(*vc));
 694         strcpy(vc->driver, "cpia2");
 695
 696         if (cam->params.pnp_id.product == 0x151)
 697                 strcpy(vc->card, "QX5 Microscope");
 698         else
 699                 strcpy(vc->card, "CPiA2 Camera");
 700         switch (cam->params.pnp_id.device_type) {
 701         case DEVICE_STV_672:
 702                 strcat(vc->card, " (672/");
 703                 break;
 704         case DEVICE_STV_676:
 705                 strcat(vc->card, " (676/");
 706                 break;
 707         default:
 708                 strcat(vc->card, " (???/");
 709                 break;
 710         }
 711         switch (cam->params.version.sensor_flags) {
 712         case CPIA2_VP_SENSOR_FLAGS_404:
 713                 strcat(vc->card, "404)");
 714                 break;
 715         case CPIA2_VP_SENSOR_FLAGS_407:
 716                 strcat(vc->card, "407)");
 717                 break;
 718         case CPIA2_VP_SENSOR_FLAGS_409:
 719                 strcat(vc->card, "409)");
 720                 break;
 721         case CPIA2_VP_SENSOR_FLAGS_410:
 722                 strcat(vc->card, "410)");
 723                 break;
 724         case CPIA2_VP_SENSOR_FLAGS_500:
 725                 strcat(vc->card, "500)");
 726                 break;
 727         default:
 728                 strcat(vc->card, "???)");
 729                 break;
 730         }
 731
 732         if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0)
 733                 memset(vc->bus_info,0, sizeof(vc->bus_info));
 734
 735         vc->version = KERNEL_VERSION(CPIA2_MAJ_VER, CPIA2_MIN_VER,
 736                                      CPIA2_PATCH_VER);
 737
 738         vc->capabilities = V4L2_CAP_VIDEO_CAPTURE |
 739                            V4L2_CAP_READWRITE |
 740                            V4L2_CAP_STREAMING;
 741
 742         return 0;
 743 }
 744
 745 /******************************************************************************
 746  *
 747  *  ioctl_input
 748  *
 749  *  V4L2 input get/set/enumerate
 750  *
 751  *****************************************************************************/
 752
 753 static int ioctl_input(unsigned int ioclt_nr,void *arg,struct camera_data *cam)
 754 {
 755         struct v4l2_input *i = arg;
 756
 757         if(ioclt_nr  != VIDIOC_G_INPUT) {
 758                 if (i->index != 0)
 759                        return -EINVAL;
 760         }
 761
 762         memset(i, 0, sizeof(*i));
 763         strcpy(i->name, "Camera");
 764         i->type = V4L2_INPUT_TYPE_CAMERA;
 765
 766         return 0;
 767 }
 768
 769 /******************************************************************************
 770  *
 771  *  ioctl_enum_fmt
 772  *
 773  *  V4L2 format enumerate
 774  *
 775  *****************************************************************************/
 776
 777 static int ioctl_enum_fmt(void *arg,struct camera_data *cam)
 778 {
 779         struct v4l2_fmtdesc *f = arg;
 780         int index = f->index;
 781
 782         if (index < 0 || index > 1)
 783                return -EINVAL;
 784
 785         memset(f, 0, sizeof(*f));
 786         f->index = index;
 787         f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 788         f->flags = V4L2_FMT_FLAG_COMPRESSED;
 789         switch(index) {
 790         case 0:
 791                 strcpy(f->description, "MJPEG");
 792                 f->pixelformat = V4L2_PIX_FMT_MJPEG;
 793                 break;
 794         case 1:
 795                 strcpy(f->description, "JPEG");
 796                 f->pixelformat = V4L2_PIX_FMT_JPEG;
 797                 break;
 798         default:
 799                 return -EINVAL;
 800         }
 801
 802         return 0;
 803 }
 804
 805 /******************************************************************************
 806  *
 807  *  ioctl_try_fmt
 808  *
 809  *  V4L2 format try
 810  *
 811  *****************************************************************************/
 812
 813 static int ioctl_try_fmt(void *arg,struct camera_data *cam)
 814 {
 815         struct v4l2_format *f = arg;
 816
 817         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 818                return -EINVAL;
 819
 820         if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG &&
 821             f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
 822                return -EINVAL;
 823
 824         f->fmt.pix.field = V4L2_FIELD_NONE;
 825         f->fmt.pix.bytesperline = 0;
 826         f->fmt.pix.sizeimage = cam->frame_size;
 827         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 828         f->fmt.pix.priv = 0;
 829
 830         switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
 831         case VIDEOSIZE_VGA:
 832                 f->fmt.pix.width = 640;
 833                 f->fmt.pix.height = 480;
 834                 break;
 835         case VIDEOSIZE_CIF:
 836                 f->fmt.pix.width = 352;
 837                 f->fmt.pix.height = 288;
 838                 break;
 839         case VIDEOSIZE_QVGA:
 840                 f->fmt.pix.width = 320;
 841                 f->fmt.pix.height = 240;
 842                 break;
 843         case VIDEOSIZE_288_216:
 844                 f->fmt.pix.width = 288;
 845                 f->fmt.pix.height = 216;
 846                 break;
 847         case VIDEOSIZE_256_192:
 848                 f->fmt.pix.width = 256;
 849                 f->fmt.pix.height = 192;
 850                 break;
 851         case VIDEOSIZE_224_168:
 852                 f->fmt.pix.width = 224;
 853                 f->fmt.pix.height = 168;
 854                 break;
 855         case VIDEOSIZE_192_144:
 856                 f->fmt.pix.width = 192;
 857                 f->fmt.pix.height = 144;
 858                 break;
 859         case VIDEOSIZE_QCIF:
 860         default:
 861                 f->fmt.pix.width = 176;
 862                 f->fmt.pix.height = 144;
 863                 break;
 864         }
 865
 866         return 0;
 867 }
 868
 869 /******************************************************************************
 870  *
 871  *  ioctl_set_fmt
 872  *
 873  *  V4L2 format set
 874  *
 875  *****************************************************************************/
 876
 877 static int ioctl_set_fmt(void *arg,struct camera_data *cam, struct cpia2_fh *fh)
 878 {
 879         struct v4l2_format *f = arg;
 880         int err, frame;
 881
 882         err = ioctl_try_fmt(arg, cam);
 883         if(err != 0)
 884                 return err;
 885
 886         /* Ensure that only this process can change the format. */
 887         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
 888         if(err != 0) {
 889                 return err;
 890         }
 891
 892         cam->pixelformat = f->fmt.pix.pixelformat;
 893
 894         /* NOTE: This should be set to 1 for MJPEG, but some apps don't handle
 895          * the missing Huffman table properly. */
 896         cam->params.compression.inhibit_htables = 0;
 897                 /*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/
 898
 899         /* we set the video window to something smaller or equal to what
 900          * is requested by the user???
 901          */
 902         DBG("Requested width = %d, height = %d\n",
 903             f->fmt.pix.width, f->fmt.pix.height);
 904         if (f->fmt.pix.width != cam->vw.width ||
 905             f->fmt.pix.height != cam->vw.height) {
 906                 cam->vw.width = f->fmt.pix.width;
 907                 cam->vw.height = f->fmt.pix.height;
 908                 cam->params.roi.width = f->fmt.pix.width;
 909                 cam->params.roi.height = f->fmt.pix.height;
 910                 cpia2_set_format(cam);
 911         }
 912
 913         for (frame = 0; frame < cam->num_frames; ++frame) {
 914                 if (cam->buffers[frame].status == FRAME_READING)
 915                         if ((err = sync(cam, frame)) < 0)
 916                                 return err;
 917
 918                 cam->buffers[frame].status = FRAME_EMPTY;
 919         }
 920
 921         return 0;
 922 }
 923
 924 /******************************************************************************
 925  *
 926  *  ioctl_get_fmt
 927  *
 928  *  V4L2 format get
 929  *
 930  *****************************************************************************/
 931
 932 static int ioctl_get_fmt(void *arg,struct camera_data *cam)
 933 {
 934         struct v4l2_format *f = arg;
 935
 936         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 937                return -EINVAL;
 938
 939         f->fmt.pix.width = cam->vw.width;
 940         f->fmt.pix.height = cam->vw.height;
 941         f->fmt.pix.pixelformat = cam->pixelformat;
 942         f->fmt.pix.field = V4L2_FIELD_NONE;
 943         f->fmt.pix.bytesperline = 0;
 944         f->fmt.pix.sizeimage = cam->frame_size;
 945         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 946         f->fmt.pix.priv = 0;
 947
 948         return 0;
 949 }
 950
 951 /******************************************************************************
 952  *
 953  *  ioctl_cropcap
 954  *
 955  *  V4L2 query cropping capabilities
 956  *  NOTE: cropping is currently disabled
 957  *
 958  *****************************************************************************/
 959
 960 static int ioctl_cropcap(void *arg,struct camera_data *cam)
 961 {
 962         struct v4l2_cropcap *c = arg;
 963
 964         if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 965                return -EINVAL;
 966
 967         c->bounds.left = 0;
 968         c->bounds.top = 0;
 969         c->bounds.width = cam->vw.width;
 970         c->bounds.height = cam->vw.height;
 971         c->defrect.left = 0;
 972         c->defrect.top = 0;
 973         c->defrect.width = cam->vw.width;
 974         c->defrect.height = cam->vw.height;
 975         c->pixelaspect.numerator = 1;
 976         c->pixelaspect.denominator = 1;
 977
 978         return 0;
 979 }
 980
 981 /******************************************************************************
 982  *
 983  *  ioctl_queryctrl
 984  *
 985  *  V4L2 query possible control variables
 986  *
 987  *****************************************************************************/
 988
 989 static int ioctl_queryctrl(void *arg,struct camera_data *cam)
 990 {
 991         struct v4l2_queryctrl *c = arg;
 992         int i;
 993
 994         for(i=0; i<NUM_CONTROLS; ++i) {
 995                 if(c->id == controls[i].id) {
 996                         memcpy(c, controls+i, sizeof(*c));
 997                         break;
 998                 }
 999         }
1000
1001         if(i == NUM_CONTROLS)
1002                 return -EINVAL;
1003
1004         /* Some devices have additional limitations */
1005         switch(c->id) {
1006         case V4L2_CID_BRIGHTNESS:
1007                 /***
1008                  * Don't let the register be set to zero - bug in VP4
1009                  * flash of full brightness
1010                  ***/
1011                 if (cam->params.pnp_id.device_type == DEVICE_STV_672)
1012                         c->minimum = 1;
1013                 break;
1014         case V4L2_CID_VFLIP:
1015                 // VP5 Only
1016                 if(cam->params.pnp_id.device_type == DEVICE_STV_672)
1017                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
1018                 break;
1019         case CPIA2_CID_FRAMERATE:
1020                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
1021                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
1022                         // Maximum 15fps
1023                         for(i=0; i<c->maximum; ++i) {
1024                                 if(framerate_controls[i].value ==
1025                                    CPIA2_VP_FRAMERATE_15) {
1026                                         c->maximum = i;
1027                                         c->default_value = i;
1028                                 }
1029                         }
1030                 }
1031                 break;
1032         case CPIA2_CID_FLICKER_MODE:
1033                 // Flicker control only valid for 672.
1034                 if(cam->params.pnp_id.device_type != DEVICE_STV_672)
1035                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
1036                 break;
1037         case CPIA2_CID_LIGHTS:
1038                 // Light control only valid for the QX5 Microscope.
1039                 if(cam->params.pnp_id.product != 0x151)
1040                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
1041                 break;
1042         default:
1043                 break;
1044         }
1045
1046         return 0;
1047 }
1048
1049 /******************************************************************************
1050  *
1051  *  ioctl_querymenu
1052  *
1053  *  V4L2 query possible control variables
1054  *
1055  *****************************************************************************/
1056
1057 static int ioctl_querymenu(void *arg,struct camera_data *cam)
1058 {
1059         struct v4l2_querymenu *m = arg;
1060
1061         memset(m->name, 0, sizeof(m->name));
1062         m->reserved = 0;
1063
1064         switch(m->id) {
1065         case CPIA2_CID_FLICKER_MODE:
1066                 if(m->index < 0 || m->index >= NUM_FLICKER_CONTROLS)
1067                         return -EINVAL;
1068
1069                 strcpy(m->name, flicker_controls[m->index].name);
1070                 break;
1071         case CPIA2_CID_FRAMERATE:
1072             {
1073                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
1074                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
1075                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
1076                         // Maximum 15fps
1077                         int i;
1078                         for(i=0; i<maximum; ++i) {
1079                                 if(framerate_controls[i].value ==
1080                                    CPIA2_VP_FRAMERATE_15)
1081                                         maximum = i;
1082                         }
1083                 }
1084                 if(m->index < 0 || m->index > maximum)
1085                         return -EINVAL;
1086
1087                 strcpy(m->name, framerate_controls[m->index].name);
1088                 break;
1089             }
1090         case CPIA2_CID_LIGHTS:
1091                 if(m->index < 0 || m->index >= NUM_LIGHTS_CONTROLS)
1092                         return -EINVAL;
1093
1094                 strcpy(m->name, lights_controls[m->index].name);
1095                 break;
1096         default:
1097                 return -EINVAL;
1098         }
1099
1100         return 0;
1101 }
1102
1103 /******************************************************************************
1104  *
1105  *  ioctl_g_ctrl
1106  *
1107  *  V4L2 get the value of a control variable
1108  *
1109  *****************************************************************************/
1110
1111 static int ioctl_g_ctrl(void *arg,struct camera_data *cam)
1112 {
1113         struct v4l2_control *c = arg;
1114
1115         switch(c->id) {
1116         case V4L2_CID_BRIGHTNESS:
1117                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_BRIGHTNESS,
1118                                  TRANSFER_READ, 0);
1119                 c->value = cam->params.color_params.brightness;
1120                 break;
1121         case V4L2_CID_CONTRAST:
1122                 cpia2_do_command(cam, CPIA2_CMD_GET_CONTRAST,
1123                                  TRANSFER_READ, 0);
1124                 c->value = cam->params.color_params.contrast;
1125                 break;
1126         case V4L2_CID_SATURATION:
1127                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_SATURATION,
1128                                  TRANSFER_READ, 0);
1129                 c->value = cam->params.color_params.saturation;
1130                 break;
1131         case V4L2_CID_HFLIP:
1132                 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
1133                                  TRANSFER_READ, 0);
1134                 c->value = (cam->params.vp_params.user_effects &
1135                             CPIA2_VP_USER_EFFECTS_MIRROR) != 0;
1136                 break;
1137         case V4L2_CID_VFLIP:
1138                 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
1139                                  TRANSFER_READ, 0);
1140                 c->value = (cam->params.vp_params.user_effects &
1141                             CPIA2_VP_USER_EFFECTS_FLIP) != 0;
1142                 break;
1143         case CPIA2_CID_TARGET_KB:
1144                 c->value = cam->params.vc_params.target_kb;
1145                 break;
1146         case CPIA2_CID_GPIO:
1147                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
1148                                  TRANSFER_READ, 0);
1149                 c->value = cam->params.vp_params.gpio_data;
1150                 break;
1151         case CPIA2_CID_FLICKER_MODE:
1152         {
1153                 int i, mode;
1154                 cpia2_do_command(cam, CPIA2_CMD_GET_FLICKER_MODES,
1155                                  TRANSFER_READ, 0);
1156                 if(cam->params.flicker_control.cam_register &
1157                    CPIA2_VP_FLICKER_MODES_NEVER_FLICKER) {
1158                         mode = NEVER_FLICKER;
1159                 } else {
1160                     if(cam->params.flicker_control.cam_register &
1161                        CPIA2_VP_FLICKER_MODES_50HZ) {
1162                         mode = FLICKER_50;
1163                     } else {
1164                         mode = FLICKER_60;
1165                     }
1166                 }
1167                 for(i=0; i<NUM_FLICKER_CONTROLS; i++) {
1168                         if(flicker_controls[i].value == mode) {
1169                                 c->value = i;
1170                                 break;
1171                         }
1172                 }
1173                 if(i == NUM_FLICKER_CONTROLS)
1174                         return -EINVAL;
1175                 break;
1176         }
1177         case CPIA2_CID_FRAMERATE:
1178         {
1179                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
1180                 int i;
1181                 for(i=0; i<= maximum; i++) {
1182                         if(cam->params.vp_params.frame_rate ==
1183                            framerate_controls[i].value)
1184                                 break;
1185                 }
1186                 if(i > maximum)
1187                         return -EINVAL;
1188                 c->value = i;
1189                 break;
1190         }
1191         case CPIA2_CID_USB_ALT:
1192                 c->value = cam->params.camera_state.stream_mode;
1193                 break;
1194         case CPIA2_CID_LIGHTS:
1195         {
1196                 int i;
1197                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
1198                                  TRANSFER_READ, 0);
1199                 for(i=0; i<NUM_LIGHTS_CONTROLS; i++) {
1200                         if((cam->params.vp_params.gpio_data&GPIO_LIGHTS_MASK) ==
1201                            lights_controls[i].value) {
1202                                 break;
1203                         }
1204                 }
1205                 if(i == NUM_LIGHTS_CONTROLS)
1206                         return -EINVAL;
1207                 c->value = i;
1208                 break;
1209         }
1210         case CPIA2_CID_RESET_CAMERA:
1211                 return -EINVAL;
1212         default:
1213                 return -EINVAL;
1214         }
1215
1216         DBG("Get control id:%d, value:%d\n", c->id, c->value);
1217
1218         return 0;
1219 }
1220
1221 /******************************************************************************
1222  *
1223  *  ioctl_s_ctrl
1224  *
1225  *  V4L2 set the value of a control variable
1226  *
1227  *****************************************************************************/
1228
1229 static int ioctl_s_ctrl(void *arg,struct camera_data *cam)
1230 {
1231         struct v4l2_control *c = arg;
1232         int i;
1233         int retval = 0;
1234
1235         DBG("Set control id:%d, value:%d\n", c->id, c->value);
1236
1237         /* Check that the value is in range */
1238         for(i=0; i<NUM_CONTROLS; i++) {
1239                 if(c->id == controls[i].id) {
1240                         if(c->value < controls[i].minimum ||
1241                            c->value > controls[i].maximum) {
1242                                 return -EINVAL;
1243                         }
1244                         break;
1245                 }
1246         }
1247         if(i == NUM_CONTROLS)
1248                 return -EINVAL;
1249
1250         switch(c->id) {
1251         case V4L2_CID_BRIGHTNESS:
1252                 cpia2_set_brightness(cam, c->value);
1253                 break;
1254         case V4L2_CID_CONTRAST:
1255                 cpia2_set_contrast(cam, c->value);
1256                 break;
1257         case V4L2_CID_SATURATION:
1258                 cpia2_set_saturation(cam, c->value);
1259                 break;
1260         case V4L2_CID_HFLIP:
1261                 cpia2_set_property_mirror(cam, c->value);
1262                 break;
1263         case V4L2_CID_VFLIP:
1264                 cpia2_set_property_flip(cam, c->value);
1265                 break;
1266         case CPIA2_CID_TARGET_KB:
1267                 retval = cpia2_set_target_kb(cam, c->value);
1268                 break;
1269         case CPIA2_CID_GPIO:
1270                 retval = cpia2_set_gpio(cam, c->value);
1271                 break;
1272         case CPIA2_CID_FLICKER_MODE:
1273                 retval = cpia2_set_flicker_mode(cam,
1274                                               flicker_controls[c->value].value);
1275                 break;
1276         case CPIA2_CID_FRAMERATE:
1277                 retval = cpia2_set_fps(cam, framerate_controls[c->value].value);
1278                 break;
1279         case CPIA2_CID_USB_ALT:
1280                 retval = cpia2_usb_change_streaming_alternate(cam, c->value);
1281                 break;
1282         case CPIA2_CID_LIGHTS:
1283                 retval = cpia2_set_gpio(cam, lights_controls[c->value].value);
1284                 break;
1285         case CPIA2_CID_RESET_CAMERA:
1286                 cpia2_usb_stream_pause(cam);
1287                 cpia2_reset_camera(cam);
1288                 cpia2_usb_stream_resume(cam);
1289                 break;
1290         default:
1291                 retval = -EINVAL;
1292         }
1293
1294         return retval;
1295 }
1296
1297 /******************************************************************************
1298  *
1299  *  ioctl_g_jpegcomp
1300  *
1301  *  V4L2 get the JPEG compression parameters
1302  *
1303  *****************************************************************************/
1304
1305 static int ioctl_g_jpegcomp(void *arg,struct camera_data *cam)
1306 {
1307         struct v4l2_jpegcompression *parms = arg;
1308
1309         memset(parms, 0, sizeof(*parms));
1310
1311         parms->quality = 80; // TODO: Can this be made meaningful?
1312
1313         parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI;
1314         if(!cam->params.compression.inhibit_htables) {
1315                 parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT;
1316         }
1317
1318         parms->APPn = cam->APPn;
1319         parms->APP_len = cam->APP_len;
1320         if(cam->APP_len > 0) {
1321                 memcpy(parms->APP_data, cam->APP_data, cam->APP_len);
1322                 parms->jpeg_markers |= V4L2_JPEG_MARKER_APP;
1323         }
1324
1325         parms->COM_len = cam->COM_len;
1326         if(cam->COM_len > 0) {
1327                 memcpy(parms->COM_data, cam->COM_data, cam->COM_len);
1328                 parms->jpeg_markers |= JPEG_MARKER_COM;
1329         }
1330
1331         DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n",
1332             parms->APP_len, parms->COM_len);
1333
1334         return 0;
1335 }
1336
1337 /******************************************************************************
1338  *
1339  *  ioctl_s_jpegcomp
1340  *
1341  *  V4L2 set the JPEG compression parameters
1342  *  NOTE: quality and some jpeg_markers are ignored.
1343  *
1344  *****************************************************************************/
1345
1346 static int ioctl_s_jpegcomp(void *arg,struct camera_data *cam)
1347 {
1348         struct v4l2_jpegcompression *parms = arg;
1349
1350         DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n",
1351             parms->APP_len, parms->COM_len);
1352
1353         cam->params.compression.inhibit_htables =
1354                 !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
1355
1356         if(parms->APP_len != 0) {
1357                 if(parms->APP_len > 0 &&
1358                    parms->APP_len <= sizeof(cam->APP_data) &&
1359                    parms->APPn >= 0 && parms->APPn <= 15) {
1360                         cam->APPn = parms->APPn;
1361                         cam->APP_len = parms->APP_len;
1362                         memcpy(cam->APP_data, parms->APP_data, parms->APP_len);
1363                 } else {
1364                         LOG("Bad APPn Params n=%d len=%d\n",
1365                             parms->APPn, parms->APP_len);
1366                         return -EINVAL;
1367                 }
1368         } else {
1369                 cam->APP_len = 0;
1370         }
1371
1372         if(parms->COM_len != 0) {
1373                 if(parms->COM_len > 0 &&
1374                    parms->COM_len <= sizeof(cam->COM_data)) {
1375                         cam->COM_len = parms->COM_len;
1376                         memcpy(cam->COM_data, parms->COM_data, parms->COM_len);
1377                 } else {
1378                         LOG("Bad COM_len=%d\n", parms->COM_len);
1379                         return -EINVAL;
1380                 }
1381         }
1382
1383         return 0;
1384 }
1385
1386 /******************************************************************************
1387  *
1388  *  ioctl_reqbufs
1389  *
1390  *  V4L2 Initiate memory mapping.
1391  *  NOTE: The user's request is ignored. For now the buffers are fixed.
1392  *
1393  *****************************************************************************/
1394
1395 static int ioctl_reqbufs(void *arg,struct camera_data *cam)
1396 {
1397         struct v4l2_requestbuffers *req = arg;
1398
1399         if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1400            req->memory != V4L2_MEMORY_MMAP)
1401                 return -EINVAL;
1402
1403         DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames);
1404         req->count = cam->num_frames;
1405         memset(&req->reserved, 0, sizeof(req->reserved));
1406
1407         return 0;
1408 }
1409
1410 /******************************************************************************
1411  *
1412  *  ioctl_querybuf
1413  *
1414  *  V4L2 Query memory buffer status.
1415  *
1416  *****************************************************************************/
1417
1418 static int ioctl_querybuf(void *arg,struct camera_data *cam)
1419 {
1420         struct v4l2_buffer *buf = arg;
1421
1422         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1423            buf->index > cam->num_frames)
1424                 return -EINVAL;
1425
1426         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1427         buf->length = cam->frame_size;
1428
1429         buf->memory = V4L2_MEMORY_MMAP;
1430
1431         if(cam->mmapped)
1432                 buf->flags = V4L2_BUF_FLAG_MAPPED;
1433         else
1434                 buf->flags = 0;
1435
1436         switch (cam->buffers[buf->index].status) {
1437         case FRAME_EMPTY:
1438         case FRAME_ERROR:
1439         case FRAME_READING:
1440                 buf->bytesused = 0;
1441                 buf->flags = V4L2_BUF_FLAG_QUEUED;
1442                 break;
1443         case FRAME_READY:
1444                 buf->bytesused = cam->buffers[buf->index].length;
1445                 buf->timestamp = cam->buffers[buf->index].timestamp;
1446                 buf->sequence = cam->buffers[buf->index].seq;
1447                 buf->flags = V4L2_BUF_FLAG_DONE;
1448                 break;
1449         }
1450
1451         DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n",
1452              buf->index, buf->m.offset, buf->flags, buf->sequence,
1453              buf->bytesused);
1454
1455         return 0;
1456 }
1457
1458 /******************************************************************************
1459  *
1460  *  ioctl_qbuf
1461  *
1462  *  V4L2 User is freeing buffer
1463  *
1464  *****************************************************************************/
1465
1466 static int ioctl_qbuf(void *arg,struct camera_data *cam)
1467 {
1468         struct v4l2_buffer *buf = arg;
1469
1470         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1471            buf->memory != V4L2_MEMORY_MMAP ||
1472            buf->index > cam->num_frames)
1473                 return -EINVAL;
1474
1475         DBG("QBUF #%d\n", buf->index);
1476
1477         if(cam->buffers[buf->index].status == FRAME_READY)
1478                 cam->buffers[buf->index].status = FRAME_EMPTY;
1479
1480         return 0;
1481 }
1482
1483 /******************************************************************************
1484  *
1485  *  find_earliest_filled_buffer
1486  *
1487  *  Helper for ioctl_dqbuf. Find the next ready buffer.
1488  *
1489  *****************************************************************************/
1490
1491 static int find_earliest_filled_buffer(struct camera_data *cam)
1492 {
1493         int i;
1494         int found = -1;
1495         for (i=0; i<cam->num_frames; i++) {
1496                 if(cam->buffers[i].status == FRAME_READY) {
1497                         if(found < 0) {
1498                                 found = i;
1499                         } else {
1500                                 /* find which buffer is earlier */
1501                                 struct timeval *tv1, *tv2;
1502                                 tv1 = &cam->buffers[i].timestamp;
1503                                 tv2 = &cam->buffers[found].timestamp;
1504                                 if(tv1->tv_sec < tv2->tv_sec ||
1505                                    (tv1->tv_sec == tv2->tv_sec &&
1506                                     tv1->tv_usec < tv2->tv_usec))
1507                                         found = i;
1508                         }
1509                 }
1510         }
1511         return found;
1512 }
1513
1514 /******************************************************************************
1515  *
1516  *  ioctl_dqbuf
1517  *
1518  *  V4L2 User is asking for a filled buffer.
1519  *
1520  *****************************************************************************/
1521
1522 static int ioctl_dqbuf(void *arg,struct camera_data *cam, struct file *file)
1523 {
1524         struct v4l2_buffer *buf = arg;
1525         int frame;
1526
1527         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1528            buf->memory != V4L2_MEMORY_MMAP)
1529                 return -EINVAL;
1530
1531         frame = find_earliest_filled_buffer(cam);
1532
1533         if(frame < 0 && file->f_flags&O_NONBLOCK)
1534                 return -EAGAIN;
1535
1536         if(frame < 0) {
1537                 /* Wait for a frame to become available */
1538                 struct framebuf *cb=cam->curbuff;
1539                 mutex_unlock(&cam->busy_lock);
1540                 wait_event_interruptible(cam->wq_stream,
1541                                          !cam->present ||
1542                                          (cb=cam->curbuff)->status == FRAME_READY);
1543                 mutex_lock(&cam->busy_lock);
1544                 if (signal_pending(current))
1545                         return -ERESTARTSYS;
1546                 if(!cam->present)
1547                         return -ENOTTY;
1548                 frame = cb->num;
1549         }
1550
1551
1552         buf->index = frame;
1553         buf->bytesused = cam->buffers[buf->index].length;
1554         buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE;
1555         buf->field = V4L2_FIELD_NONE;
1556         buf->timestamp = cam->buffers[buf->index].timestamp;
1557         buf->sequence = cam->buffers[buf->index].seq;
1558         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1559         buf->length = cam->frame_size;
1560         buf->input = 0;
1561         buf->reserved = 0;
1562         memset(&buf->timecode, 0, sizeof(buf->timecode));
1563
1564         DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index,
1565             cam->buffers[buf->index].status, buf->sequence, buf->bytesused);
1566
1567         return 0;
1568 }
1569
1570 /******************************************************************************
1571  *
1572  *  cpia2_ioctl
1573  *
1574  *****************************************************************************/
1575 static long cpia2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
1576 {
1577         struct camera_data *cam = video_drvdata(file);
1578         long retval = 0;
1579
1580         if (!cam)
1581                 return -ENOTTY;
1582
1583         /* make this _really_ smp-safe */
1584         if (mutex_lock_interruptible(&cam->busy_lock))
1585                 return -ERESTARTSYS;
1586
1587         if (!cam->present) {
1588                 mutex_unlock(&cam->busy_lock);
1589                 return -ENODEV;
1590         }
1591
1592         /* Priority check */
1593         switch (cmd) {
1594         case VIDIOCSWIN:
1595         case VIDIOCMCAPTURE:
1596         case VIDIOC_S_FMT:
1597         {
1598                 struct cpia2_fh *fh = file->private_data;
1599                 retval = v4l2_prio_check(&cam->prio, &fh->prio);
1600                 if(retval) {
1601                         mutex_unlock(&cam->busy_lock);
1602                         return retval;
1603                 }
1604                 break;
1605         }
1606         case VIDIOCGMBUF:
1607         case VIDIOCSYNC:
1608         {
1609                 struct cpia2_fh *fh = file->private_data;
1610                 if(fh->prio != V4L2_PRIORITY_RECORD) {
1611                         mutex_unlock(&cam->busy_lock);
1612                         return -EBUSY;
1613                 }
1614                 break;
1615         }
1616         default:
1617                 break;
1618         }
1619
1620         switch (cmd) {
1621         case VIDIOCGCAP:        /* query capabilities */
1622                 retval = ioctl_cap_query(arg, cam);
1623                 break;
1624
1625         case VIDIOCGCHAN:       /* get video source - we are a camera, nothing else */
1626                 retval = ioctl_get_channel(arg);
1627                 break;
1628         case VIDIOCSCHAN:       /* set video source - we are a camera, nothing else */
1629                 retval = ioctl_set_channel(arg);
1630                 break;
1631         case VIDIOCGPICT:       /* image properties */
1632                 memcpy(arg, &cam->vp, sizeof(struct video_picture));
1633                 break;
1634         case VIDIOCSPICT:
1635                 retval = ioctl_set_image_prop(arg, cam);
1636                 break;
1637         case VIDIOCGWIN:        /* get/set capture window */
1638                 memcpy(arg, &cam->vw, sizeof(struct video_window));
1639                 break;
1640         case VIDIOCSWIN:
1641                 retval = ioctl_set_window_size(arg, cam, file->private_data);
1642                 break;
1643         case VIDIOCGMBUF:       /* mmap interface */
1644                 retval = ioctl_get_mbuf(arg, cam);
1645                 break;
1646         case VIDIOCMCAPTURE:
1647                 retval = ioctl_mcapture(arg, cam, file->private_data);
1648                 break;
1649         case VIDIOCSYNC:
1650                 retval = ioctl_sync(arg, cam);
1651                 break;
1652                 /* pointless to implement overlay with this camera */
1653         case VIDIOCCAPTURE:
1654         case VIDIOCGFBUF:
1655         case VIDIOCSFBUF:
1656         case VIDIOCKEY:
1657                 retval = -EINVAL;
1658                 break;
1659
1660                 /* tuner interface - we have none */
1661         case VIDIOCGTUNER:
1662         case VIDIOCSTUNER:
1663         case VIDIOCGFREQ:
1664         case VIDIOCSFREQ:
1665                 retval = -EINVAL;
1666                 break;
1667
1668                 /* audio interface - we have none */
1669         case VIDIOCGAUDIO:
1670         case VIDIOCSAUDIO:
1671                 retval = -EINVAL;
1672                 break;
1673
1674         /* CPIA2 extension to Video4Linux API */
1675         case CPIA2_IOC_SET_GPIO:
1676                 retval = ioctl_set_gpio(arg, cam);
1677                 break;
1678         case VIDIOC_QUERYCAP:
1679                 retval = ioctl_querycap(arg,cam);
1680                 break;
1681
1682         case VIDIOC_ENUMINPUT:
1683         case VIDIOC_G_INPUT:
1684         case VIDIOC_S_INPUT:
1685                 retval = ioctl_input(cmd, arg, cam);
1686                 break;
1687
1688         case VIDIOC_ENUM_FMT:
1689                 retval = ioctl_enum_fmt(arg,cam);
1690                 break;
1691         case VIDIOC_TRY_FMT:
1692                 retval = ioctl_try_fmt(arg,cam);
1693                 break;
1694         case VIDIOC_G_FMT:
1695                 retval = ioctl_get_fmt(arg,cam);
1696                 break;
1697         case VIDIOC_S_FMT:
1698                 retval = ioctl_set_fmt(arg,cam,file->private_data);
1699                 break;
1700
1701         case VIDIOC_CROPCAP:
1702                 retval = ioctl_cropcap(arg,cam);
1703                 break;
1704         case VIDIOC_G_CROP:
1705         case VIDIOC_S_CROP:
1706                 // TODO: I think cropping can be implemented - SJB
1707                 retval = -EINVAL;
1708                 break;
1709
1710         case VIDIOC_QUERYCTRL:
1711                 retval = ioctl_queryctrl(arg,cam);
1712                 break;
1713         case VIDIOC_QUERYMENU:
1714                 retval = ioctl_querymenu(arg,cam);
1715                 break;
1716         case VIDIOC_G_CTRL:
1717                 retval = ioctl_g_ctrl(arg,cam);
1718                 break;
1719         case VIDIOC_S_CTRL:
1720                 retval = ioctl_s_ctrl(arg,cam);
1721                 break;
1722
1723         case VIDIOC_G_JPEGCOMP:
1724                 retval = ioctl_g_jpegcomp(arg,cam);
1725                 break;
1726         case VIDIOC_S_JPEGCOMP:
1727                 retval = ioctl_s_jpegcomp(arg,cam);
1728                 break;
1729
1730         case VIDIOC_G_PRIORITY:
1731         {
1732                 struct cpia2_fh *fh = file->private_data;
1733                 *(enum v4l2_priority*)arg = fh->prio;
1734                 break;
1735         }
1736         case VIDIOC_S_PRIORITY:
1737         {
1738                 struct cpia2_fh *fh = file->private_data;
1739                 enum v4l2_priority prio;
1740                 prio = *(enum v4l2_priority*)arg;
1741                 if(cam->streaming &&
1742                    prio != fh->prio &&
1743                    fh->prio == V4L2_PRIORITY_RECORD) {
1744                         /* Can't drop record priority while streaming */
1745                         retval = -EBUSY;
1746                 } else if(prio == V4L2_PRIORITY_RECORD &&
1747                    prio != fh->prio &&
1748                    v4l2_prio_max(&cam->prio) == V4L2_PRIORITY_RECORD) {
1749                         /* Only one program can record at a time */
1750                         retval = -EBUSY;
1751                 } else {
1752                         retval = v4l2_prio_change(&cam->prio, &fh->prio, prio);
1753                 }
1754                 break;
1755         }
1756
1757         case VIDIOC_REQBUFS:
1758                 retval = ioctl_reqbufs(arg,cam);
1759                 break;
1760         case VIDIOC_QUERYBUF:
1761                 retval = ioctl_querybuf(arg,cam);
1762                 break;
1763         case VIDIOC_QBUF:
1764                 retval = ioctl_qbuf(arg,cam);
1765                 break;
1766         case VIDIOC_DQBUF:
1767                 retval = ioctl_dqbuf(arg,cam,file);
1768                 break;
1769         case VIDIOC_STREAMON:
1770         {
1771                 int type;
1772                 DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming);
1773                 type = *(int*)arg;
1774                 if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1775                         retval = -EINVAL;
1776
1777                 if(!cam->streaming) {
1778                         retval = cpia2_usb_stream_start(cam,
1779                                           cam->params.camera_state.stream_mode);
1780                 } else {
1781                         retval = -EINVAL;
1782                 }
1783
1784                 break;
1785         }
1786         case VIDIOC_STREAMOFF:
1787         {
1788                 int type;
1789                 DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming);
1790                 type = *(int*)arg;
1791                 if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1792                         retval = -EINVAL;
1793
1794                 if(cam->streaming) {
1795                         retval = cpia2_usb_stream_stop(cam);
1796                 } else {
1797                         retval = -EINVAL;
1798                 }
1799
1800                 break;
1801         }
1802
1803         case VIDIOC_ENUMOUTPUT:
1804         case VIDIOC_G_OUTPUT:
1805         case VIDIOC_S_OUTPUT:
1806         case VIDIOC_G_MODULATOR:
1807         case VIDIOC_S_MODULATOR:
1808
1809         case VIDIOC_ENUMAUDIO:
1810         case VIDIOC_G_AUDIO:
1811         case VIDIOC_S_AUDIO:
1812
1813         case VIDIOC_ENUMAUDOUT:
1814         case VIDIOC_G_AUDOUT:
1815         case VIDIOC_S_AUDOUT:
1816
1817         case VIDIOC_ENUMSTD:
1818         case VIDIOC_QUERYSTD:
1819         case VIDIOC_G_STD:
1820         case VIDIOC_S_STD:
1821
1822         case VIDIOC_G_TUNER:
1823         case VIDIOC_S_TUNER:
1824         case VIDIOC_G_FREQUENCY:
1825         case VIDIOC_S_FREQUENCY:
1826
1827         case VIDIOC_OVERLAY:
1828         case VIDIOC_G_FBUF:
1829         case VIDIOC_S_FBUF:
1830
1831         case VIDIOC_G_PARM:
1832         case VIDIOC_S_PARM:
1833                 retval = -EINVAL;
1834                 break;
1835         default:
1836                 retval = -ENOIOCTLCMD;
1837                 break;
1838         }
1839
1840         mutex_unlock(&cam->busy_lock);
1841         return retval;
1842 }
1843
1844 static long cpia2_ioctl(struct file *file,
1845                        unsigned int cmd, unsigned long arg)
1846 {
1847         return video_usercopy(file, cmd, arg, cpia2_do_ioctl);
1848 }
1849
1850 /******************************************************************************
1851  *
1852  *  cpia2_mmap
1853  *
1854  *****************************************************************************/
1855 static int cpia2_mmap(struct file *file, struct vm_area_struct *area)
1856 {
1857         struct camera_data *cam = video_drvdata(file);
1858         int retval;
1859
1860         /* Priority check */
1861         struct cpia2_fh *fh = file->private_data;
1862         if(fh->prio != V4L2_PRIORITY_RECORD) {
1863                 return -EBUSY;
1864         }
1865
1866         retval = cpia2_remap_buffer(cam, area);
1867
1868         if(!retval)
1869                 fh->mmapped = 1;
1870         return retval;
1871 }
1872
1873 /******************************************************************************
1874  *
1875  *  reset_camera_struct_v4l
1876  *
1877  *  Sets all values to the defaults
1878  *****************************************************************************/
1879 static void reset_camera_struct_v4l(struct camera_data *cam)
1880 {
1881         /***
1882          * Fill in the v4l structures.  video_cap is filled in inside the VIDIOCCAP
1883          * Ioctl.  Here, just do the window and picture stucts.
1884          ***/
1885         cam->vp.palette = (u16) VIDEO_PALETTE_RGB24;    /* Is this right? */
1886         cam->vp.brightness = (u16) cam->params.color_params.brightness * 256;
1887         cam->vp.colour = (u16) cam->params.color_params.saturation * 256;
1888         cam->vp.contrast = (u16) cam->params.color_params.contrast * 256;
1889
1890         cam->vw.x = 0;
1891         cam->vw.y = 0;
1892         cam->vw.width = cam->params.roi.width;
1893         cam->vw.height = cam->params.roi.height;
1894         cam->vw.flags = 0;
1895         cam->vw.clipcount = 0;
1896
1897         cam->frame_size = buffer_size;
1898         cam->num_frames = num_buffers;
1899
1900         /* FlickerModes */
1901         cam->params.flicker_control.flicker_mode_req = flicker_mode;
1902         cam->params.flicker_control.mains_frequency = flicker_freq;
1903
1904         /* streamMode */
1905         cam->params.camera_state.stream_mode = alternate;
1906
1907         cam->pixelformat = V4L2_PIX_FMT_JPEG;
1908         v4l2_prio_init(&cam->prio);
1909         return;
1910 }
1911
1912 /***
1913  * The v4l video device structure initialized for this device
1914  ***/
1915 static const struct v4l2_file_operations fops_template = {
1916         .owner          = THIS_MODULE,
1917         .open           = cpia2_open,
1918         .release        = cpia2_close,
1919         .read           = cpia2_v4l_read,
1920         .poll           = cpia2_v4l_poll,
1921         .ioctl          = cpia2_ioctl,
1922         .mmap           = cpia2_mmap,
1923 };
1924
1925 static struct video_device cpia2_template = {
1926         /* I could not find any place for the old .initialize initializer?? */
1927         .name=          "CPiA2 Camera",
1928         .minor=         -1,
1929         .fops=          &fops_template,
1930         .release=       video_device_release,
1931 };
1932
1933 /******************************************************************************
1934  *
1935  *  cpia2_register_camera
1936  *
1937  *****************************************************************************/
1938 int cpia2_register_camera(struct camera_data *cam)
1939 {
1940         cam->vdev = video_device_alloc();
1941         if(!cam->vdev)
1942                 return -ENOMEM;
1943
1944         memcpy(cam->vdev, &cpia2_template, sizeof(cpia2_template));
1945         video_set_drvdata(cam->vdev, cam);
1946
1947         reset_camera_struct_v4l(cam);
1948
1949         /* register v4l device */
1950         if (video_register_device(cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
1951                 ERR("video_register_device failed\n");
1952                 video_device_release(cam->vdev);
1953                 return -ENODEV;
1954         }
1955
1956         return 0;
1957 }
1958
1959 /******************************************************************************
1960  *
1961  *  cpia2_unregister_camera
1962  *
1963  *****************************************************************************/
1964 void cpia2_unregister_camera(struct camera_data *cam)
1965 {
1966         if (!cam->open_count) {
1967                 video_unregister_device(cam->vdev);
1968         } else {
1969                 LOG("/dev/video%d removed while open, "
1970                     "deferring video_unregister_device\n",
1971                     cam->vdev->num);
1972         }
1973 }
1974
1975 /******************************************************************************
1976  *
1977  *  check_parameters
1978  *
1979  *  Make sure that all user-supplied parameters are sensible
1980  *****************************************************************************/
1981 static void __init check_parameters(void)
1982 {
1983         if(buffer_size < PAGE_SIZE) {
1984                 buffer_size = PAGE_SIZE;
1985                 LOG("buffer_size too small, setting to %d\n", buffer_size);
1986         } else if(buffer_size > 1024*1024) {
1987                 /* arbitrary upper limiit */
1988                 buffer_size = 1024*1024;
1989                 LOG("buffer_size ridiculously large, setting to %d\n",
1990                     buffer_size);
1991         } else {
1992                 buffer_size += PAGE_SIZE-1;
1993                 buffer_size &= ~(PAGE_SIZE-1);
1994         }
1995
1996         if(num_buffers < 1) {
1997                 num_buffers = 1;
1998                 LOG("num_buffers too small, setting to %d\n", num_buffers);
1999         } else if(num_buffers > VIDEO_MAX_FRAME) {
2000                 num_buffers = VIDEO_MAX_FRAME;
2001                 LOG("num_buffers too large, setting to %d\n", num_buffers);
2002         }
2003
2004         if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) {
2005                 alternate = DEFAULT_ALT;
2006                 LOG("alternate specified is invalid, using %d\n", alternate);
2007         }
2008
2009         if (flicker_mode != NEVER_FLICKER && flicker_mode != ANTI_FLICKER_ON) {
2010                 flicker_mode = NEVER_FLICKER;
2011                 LOG("Flicker mode specified is invalid, using %d\n",
2012                     flicker_mode);
2013         }
2014
2015         if (flicker_freq != FLICKER_50 && flicker_freq != FLICKER_60) {
2016                 flicker_freq = FLICKER_60;
2017                 LOG("Flicker mode specified is invalid, using %d\n",
2018                     flicker_freq);
2019         }
2020
2021         if(video_nr < -1 || video_nr > 64) {
2022                 video_nr = -1;
2023                 LOG("invalid video_nr specified, must be -1 to 64\n");
2024         }
2025
2026         DBG("Using %d buffers, each %d bytes, alternate=%d\n",
2027             num_buffers, buffer_size, alternate);
2028 }
2029
2030 /************   Module Stuff ***************/
2031
2032
2033 /******************************************************************************
2034  *
2035  * cpia2_init/module_init
2036  *
2037  *****************************************************************************/
2038 static int __init cpia2_init(void)
2039 {
2040         LOG("%s v%d.%d.%d\n",
2041             ABOUT, CPIA2_MAJ_VER, CPIA2_MIN_VER, CPIA2_PATCH_VER);
2042         check_parameters();
2043         cpia2_usb_init();
2044         return 0;
2045 }
2046
2047
2048 /******************************************************************************
2049  *
2050  * cpia2_exit/module_exit
2051  *
2052  *****************************************************************************/
2053 static void __exit cpia2_exit(void)
2054 {
2055         cpia2_usb_cleanup();
2056         schedule_timeout(2 * HZ);
2057 }
2058
2059 module_init(cpia2_init);
2060 module_exit(cpia2_exit);
2061