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 <linux/videodev.h>
  41 #include <media/v4l2-ioctl.h>
  42
  43 #include "cpia2.h"
  44 #include "cpia2dev.h"
  45
  46
  47 //#define _CPIA2_DEBUG_
  48
  49 #define MAKE_STRING_1(x)        #x
  50 #define MAKE_STRING(x)  MAKE_STRING_1(x)
  51
  52 static int video_nr = -1;
  53 module_param(video_nr, int, 0);
  54 MODULE_PARM_DESC(video_nr,"video device to register (0=/dev/video0, etc)");
  55
  56 static int buffer_size = 68*1024;
  57 module_param(buffer_size, int, 0);
  58 MODULE_PARM_DESC(buffer_size, "Size for each frame buffer in bytes (default 68k)");
  59
  60 static int num_buffers = 3;
  61 module_param(num_buffers, int, 0);
  62 MODULE_PARM_DESC(num_buffers, "Number of frame buffers (1-"
  63                  MAKE_STRING(VIDEO_MAX_FRAME) ", default 3)");
  64
  65 static int alternate = DEFAULT_ALT;
  66 module_param(alternate, int, 0);
  67 MODULE_PARM_DESC(alternate, "USB Alternate (" MAKE_STRING(USBIF_ISO_1) "-"
  68                  MAKE_STRING(USBIF_ISO_6) ", default "
  69                  MAKE_STRING(DEFAULT_ALT) ")");
  70
  71 static int flicker_freq = 60;
  72 module_param(flicker_freq, int, 0);
  73 MODULE_PARM_DESC(flicker_freq, "Flicker frequency (" MAKE_STRING(50) "or"
  74                  MAKE_STRING(60) ", default "
  75                  MAKE_STRING(60) ")");
  76
  77 static int flicker_mode = NEVER_FLICKER;
  78 module_param(flicker_mode, int, 0);
  79 MODULE_PARM_DESC(flicker_mode,
  80                  "Flicker supression (" MAKE_STRING(NEVER_FLICKER) "or"
  81                  MAKE_STRING(ANTI_FLICKER_ON) ", default "
  82                  MAKE_STRING(NEVER_FLICKER) ")");
  83
  84 MODULE_AUTHOR("Steve Miller (STMicroelectronics) <steve.miller@st.com>");
  85 MODULE_DESCRIPTION("V4L-driver for STMicroelectronics CPiA2 based cameras");
  86 MODULE_SUPPORTED_DEVICE("video");
  87 MODULE_LICENSE("GPL");
  88
  89 #define ABOUT "V4L-Driver for Vision CPiA2 based cameras"
  90
  91 struct control_menu_info {
  92         int value;
  93         char name[32];
  94 };
  95
  96 static struct control_menu_info framerate_controls[] =
  97 {
  98         { CPIA2_VP_FRAMERATE_6_25, "6.25 fps" },
  99         { CPIA2_VP_FRAMERATE_7_5,  "7.5 fps"  },
 100         { CPIA2_VP_FRAMERATE_12_5, "12.5 fps" },
 101         { CPIA2_VP_FRAMERATE_15,   "15 fps"   },
 102         { CPIA2_VP_FRAMERATE_25,   "25 fps"   },
 103         { CPIA2_VP_FRAMERATE_30,   "30 fps"   },
 104 };
 105 #define NUM_FRAMERATE_CONTROLS (ARRAY_SIZE(framerate_controls))
 106
 107 static struct control_menu_info flicker_controls[] =
 108 {
 109         { NEVER_FLICKER, "Off" },
 110         { FLICKER_50,    "50 Hz" },
 111         { FLICKER_60,    "60 Hz"  },
 112 };
 113 #define NUM_FLICKER_CONTROLS (ARRAY_SIZE(flicker_controls))
 114
 115 static struct control_menu_info lights_controls[] =
 116 {
 117         { 0,   "Off" },
 118         { 64,  "Top" },
 119         { 128, "Bottom"  },
 120         { 192, "Both"  },
 121 };
 122 #define NUM_LIGHTS_CONTROLS (ARRAY_SIZE(lights_controls))
 123 #define GPIO_LIGHTS_MASK 192
 124
 125 static struct v4l2_queryctrl controls[] = {
 126         {
 127                 .id            = V4L2_CID_BRIGHTNESS,
 128                 .type          = V4L2_CTRL_TYPE_INTEGER,
 129                 .name          = "Brightness",
 130                 .minimum       = 0,
 131                 .maximum       = 255,
 132                 .step          = 1,
 133                 .default_value = DEFAULT_BRIGHTNESS,
 134         },
 135         {
 136                 .id            = V4L2_CID_CONTRAST,
 137                 .type          = V4L2_CTRL_TYPE_INTEGER,
 138                 .name          = "Contrast",
 139                 .minimum       = 0,
 140                 .maximum       = 255,
 141                 .step          = 1,
 142                 .default_value = DEFAULT_CONTRAST,
 143         },
 144         {
 145                 .id            = V4L2_CID_SATURATION,
 146                 .type          = V4L2_CTRL_TYPE_INTEGER,
 147                 .name          = "Saturation",
 148                 .minimum       = 0,
 149                 .maximum       = 255,
 150                 .step          = 1,
 151                 .default_value = DEFAULT_SATURATION,
 152         },
 153         {
 154                 .id            = V4L2_CID_HFLIP,
 155                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
 156                 .name          = "Mirror Horizontally",
 157                 .minimum       = 0,
 158                 .maximum       = 1,
 159                 .step          = 1,
 160                 .default_value = 0,
 161         },
 162         {
 163                 .id            = V4L2_CID_VFLIP,
 164                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
 165                 .name          = "Flip Vertically",
 166                 .minimum       = 0,
 167                 .maximum       = 1,
 168                 .step          = 1,
 169                 .default_value = 0,
 170         },
 171         {
 172                 .id            = CPIA2_CID_TARGET_KB,
 173                 .type          = V4L2_CTRL_TYPE_INTEGER,
 174                 .name          = "Target KB",
 175                 .minimum       = 0,
 176                 .maximum       = 255,
 177                 .step          = 1,
 178                 .default_value = DEFAULT_TARGET_KB,
 179         },
 180         {
 181                 .id            = CPIA2_CID_GPIO,
 182                 .type          = V4L2_CTRL_TYPE_INTEGER,
 183                 .name          = "GPIO",
 184                 .minimum       = 0,
 185                 .maximum       = 255,
 186                 .step          = 1,
 187                 .default_value = 0,
 188         },
 189         {
 190                 .id            = CPIA2_CID_FLICKER_MODE,
 191                 .type          = V4L2_CTRL_TYPE_MENU,
 192                 .name          = "Flicker Reduction",
 193                 .minimum       = 0,
 194                 .maximum       = NUM_FLICKER_CONTROLS-1,
 195                 .step          = 1,
 196                 .default_value = 0,
 197         },
 198         {
 199                 .id            = CPIA2_CID_FRAMERATE,
 200                 .type          = V4L2_CTRL_TYPE_MENU,
 201                 .name          = "Framerate",
 202                 .minimum       = 0,
 203                 .maximum       = NUM_FRAMERATE_CONTROLS-1,
 204                 .step          = 1,
 205                 .default_value = NUM_FRAMERATE_CONTROLS-1,
 206         },
 207         {
 208                 .id            = CPIA2_CID_USB_ALT,
 209                 .type          = V4L2_CTRL_TYPE_INTEGER,
 210                 .name          = "USB Alternate",
 211                 .minimum       = USBIF_ISO_1,
 212                 .maximum       = USBIF_ISO_6,
 213                 .step          = 1,
 214                 .default_value = DEFAULT_ALT,
 215         },
 216         {
 217                 .id            = CPIA2_CID_LIGHTS,
 218                 .type          = V4L2_CTRL_TYPE_MENU,
 219                 .name          = "Lights",
 220                 .minimum       = 0,
 221                 .maximum       = NUM_LIGHTS_CONTROLS-1,
 222                 .step          = 1,
 223                 .default_value = 0,
 224         },
 225         {
 226                 .id            = CPIA2_CID_RESET_CAMERA,
 227                 .type          = V4L2_CTRL_TYPE_BUTTON,
 228                 .name          = "Reset Camera",
 229                 .minimum       = 0,
 230                 .maximum       = 0,
 231                 .step          = 0,
 232                 .default_value = 0,
 233         },
 234 };
 235 #define NUM_CONTROLS (ARRAY_SIZE(controls))
 236
 237
 238 /******************************************************************************
 239  *
 240  *  cpia2_open
 241  *
 242  *****************************************************************************/
 243 static int cpia2_open(struct file *file)
 244 {
 245         struct camera_data *cam = video_drvdata(file);
 246         int retval = 0;
 247
 248         if (!cam) {
 249                 ERR("Internal error, camera_data not found!\n");
 250                 return -ENODEV;
 251         }
 252
 253         if(mutex_lock_interruptible(&cam->busy_lock))
 254                 return -ERESTARTSYS;
 255
 256         if(!cam->present) {
 257                 retval = -ENODEV;
 258                 goto err_return;
 259         }
 260
 261         if (cam->open_count > 0) {
 262                 goto skip_init;
 263         }
 264
 265         if (cpia2_allocate_buffers(cam)) {
 266                 retval = -ENOMEM;
 267                 goto err_return;
 268         }
 269
 270         /* reset the camera */
 271         if (cpia2_reset_camera(cam) < 0) {
 272                 retval = -EIO;
 273                 goto err_return;
 274         }
 275
 276         cam->APP_len = 0;
 277         cam->COM_len = 0;
 278
 279 skip_init:
 280         {
 281                 struct cpia2_fh *fh = kmalloc(sizeof(*fh),GFP_KERNEL);
 282                 if(!fh) {
 283                         retval = -ENOMEM;
 284                         goto err_return;
 285                 }
 286                 file->private_data = fh;
 287                 fh->prio = V4L2_PRIORITY_UNSET;
 288                 v4l2_prio_open(&cam->prio, &fh->prio);
 289                 fh->mmapped = 0;
 290         }
 291
 292         ++cam->open_count;
 293
 294         cpia2_dbg_dump_registers(cam);
 295
 296 err_return:
 297         mutex_unlock(&cam->busy_lock);
 298         return retval;
 299 }
 300
 301 /******************************************************************************
 302  *
 303  *  cpia2_close
 304  *
 305  *****************************************************************************/
 306 static int cpia2_close(struct file *file)
 307 {
 308         struct video_device *dev = video_devdata(file);
 309         struct camera_data *cam = video_get_drvdata(dev);
 310         struct cpia2_fh *fh = file->private_data;
 311
 312         mutex_lock(&cam->busy_lock);
 313
 314         if (cam->present &&
 315             (cam->open_count == 1
 316              || fh->prio == V4L2_PRIORITY_RECORD
 317             )) {
 318                 cpia2_usb_stream_stop(cam);
 319
 320                 if(cam->open_count == 1) {
 321                         /* save camera state for later open */
 322                         cpia2_save_camera_state(cam);
 323
 324                         cpia2_set_low_power(cam);
 325                         cpia2_free_buffers(cam);
 326                 }
 327         }
 328
 329         {
 330                 if(fh->mmapped)
 331                         cam->mmapped = 0;
 332                 v4l2_prio_close(&cam->prio,&fh->prio);
 333                 file->private_data = NULL;
 334                 kfree(fh);
 335         }
 336
 337         if (--cam->open_count == 0) {
 338                 cpia2_free_buffers(cam);
 339                 if (!cam->present) {
 340                         video_unregister_device(dev);
 341                         mutex_unlock(&cam->busy_lock);
 342                         kfree(cam);
 343                         return 0;
 344                 }
 345         }
 346
 347         mutex_unlock(&cam->busy_lock);
 348
 349         return 0;
 350 }
 351
 352 /******************************************************************************
 353  *
 354  *  cpia2_v4l_read
 355  *
 356  *****************************************************************************/
 357 static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count,
 358                               loff_t *off)
 359 {
 360         struct camera_data *cam = video_drvdata(file);
 361         int noblock = file->f_flags&O_NONBLOCK;
 362
 363         struct cpia2_fh *fh = file->private_data;
 364
 365         if(!cam)
 366                 return -EINVAL;
 367
 368         /* Priority check */
 369         if(fh->prio != V4L2_PRIORITY_RECORD) {
 370                 return -EBUSY;
 371         }
 372
 373         return cpia2_read(cam, buf, count, noblock);
 374 }
 375
 376
 377 /******************************************************************************
 378  *
 379  *  cpia2_v4l_poll
 380  *
 381  *****************************************************************************/
 382 static unsigned int cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait)
 383 {
 384         struct camera_data *cam = video_drvdata(filp);
 385         struct cpia2_fh *fh = filp->private_data;
 386
 387         if(!cam)
 388                 return POLLERR;
 389
 390         /* Priority check */
 391         if(fh->prio != V4L2_PRIORITY_RECORD) {
 392                 return POLLERR;
 393         }
 394
 395         return cpia2_poll(cam, filp, wait);
 396 }
 397
 398
 399 /******************************************************************************
 400  *
 401  *  ioctl_cap_query
 402  *
 403  *****************************************************************************/
 404 static int ioctl_cap_query(void *arg, struct camera_data *cam)
 405 {
 406         struct video_capability *vc;
 407         int retval = 0;
 408         vc = arg;
 409
 410         if (cam->params.pnp_id.product == 0x151)
 411                 strcpy(vc->name, "QX5 Microscope");
 412         else
 413                 strcpy(vc->name, "CPiA2 Camera");
 414
 415         vc->type = VID_TYPE_CAPTURE | VID_TYPE_MJPEG_ENCODER;
 416         vc->channels = 1;
 417         vc->audios = 0;
 418         vc->minwidth = 176;     /* VIDEOSIZE_QCIF */
 419         vc->minheight = 144;
 420         switch (cam->params.version.sensor_flags) {
 421         case CPIA2_VP_SENSOR_FLAGS_500:
 422                 vc->maxwidth = STV_IMAGE_VGA_COLS;
 423                 vc->maxheight = STV_IMAGE_VGA_ROWS;
 424                 break;
 425         case CPIA2_VP_SENSOR_FLAGS_410:
 426                 vc->maxwidth = STV_IMAGE_CIF_COLS;
 427                 vc->maxheight = STV_IMAGE_CIF_ROWS;
 428                 break;
 429         default:
 430                 return -EINVAL;
 431         }
 432
 433         return retval;
 434 }
 435
 436 /******************************************************************************
 437  *
 438  *  ioctl_get_channel
 439  *
 440  *****************************************************************************/
 441 static int ioctl_get_channel(void *arg)
 442 {
 443         int retval = 0;
 444         struct video_channel *v;
 445         v = arg;
 446
 447         if (v->channel != 0)
 448                 return -EINVAL;
 449
 450         v->channel = 0;
 451         strcpy(v->name, "Camera");
 452         v->tuners = 0;
 453         v->flags = 0;
 454         v->type = VIDEO_TYPE_CAMERA;
 455         v->norm = 0;
 456
 457         return retval;
 458 }
 459
 460 /******************************************************************************
 461  *
 462  *  ioctl_set_channel
 463  *
 464  *****************************************************************************/
 465 static int ioctl_set_channel(void *arg)
 466 {
 467         struct video_channel *v;
 468         int retval = 0;
 469         v = arg;
 470
 471         if (retval == 0 && v->channel != 0)
 472                 retval = -EINVAL;
 473
 474         return retval;
 475 }
 476
 477 /******************************************************************************
 478  *
 479  *  ioctl_set_image_prop
 480  *
 481  *****************************************************************************/
 482 static int ioctl_set_image_prop(void *arg, struct camera_data *cam)
 483 {
 484         struct video_picture *vp;
 485         int retval = 0;
 486         vp = arg;
 487
 488         /* brightness, color, contrast need no check 0-65535 */
 489         memcpy(&cam->vp, vp, sizeof(*vp));
 490
 491         /* update cam->params.colorParams */
 492         cam->params.color_params.brightness = vp->brightness / 256;
 493         cam->params.color_params.saturation = vp->colour / 256;
 494         cam->params.color_params.contrast = vp->contrast / 256;
 495
 496         DBG("Requested params: bright 0x%X, sat 0x%X, contrast 0x%X\n",
 497             cam->params.color_params.brightness,
 498             cam->params.color_params.saturation,
 499             cam->params.color_params.contrast);
 500
 501         cpia2_set_color_params(cam);
 502
 503         return retval;
 504 }
 505
 506 static int sync(struct camera_data *cam, int frame_nr)
 507 {
 508         struct framebuf *frame = &cam->buffers[frame_nr];
 509
 510         while (1) {
 511                 if (frame->status == FRAME_READY)
 512                         return 0;
 513
 514                 if (!cam->streaming) {
 515                         frame->status = FRAME_READY;
 516                         frame->length = 0;
 517                         return 0;
 518                 }
 519
 520                 mutex_unlock(&cam->busy_lock);
 521                 wait_event_interruptible(cam->wq_stream,
 522                                          !cam->streaming ||
 523                                          frame->status == FRAME_READY);
 524                 mutex_lock(&cam->busy_lock);
 525                 if (signal_pending(current))
 526                         return -ERESTARTSYS;
 527                 if(!cam->present)
 528                         return -ENOTTY;
 529         }
 530 }
 531
 532 /******************************************************************************
 533  *
 534  *  ioctl_set_window_size
 535  *
 536  *****************************************************************************/
 537 static int ioctl_set_window_size(void *arg, struct camera_data *cam,
 538                                  struct cpia2_fh *fh)
 539 {
 540         /* copy_from_user, check validity, copy to internal structure */
 541         struct video_window *vw;
 542         int frame, err;
 543         vw = arg;
 544
 545         if (vw->clipcount != 0) /* clipping not supported */
 546                 return -EINVAL;
 547
 548         if (vw->clips != NULL)  /* clipping not supported */
 549                 return -EINVAL;
 550
 551         /* Ensure that only this process can change the format. */
 552         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
 553         if(err != 0)
 554                 return err;
 555
 556         cam->pixelformat = V4L2_PIX_FMT_JPEG;
 557
 558         /* Be sure to supply the Huffman tables, this isn't MJPEG */
 559         cam->params.compression.inhibit_htables = 0;
 560
 561         /* we set the video window to something smaller or equal to what
 562          * is requested by the user???
 563          */
 564         DBG("Requested width = %d, height = %d\n", vw->width, vw->height);
 565         if (vw->width != cam->vw.width || vw->height != cam->vw.height) {
 566                 cam->vw.width = vw->width;
 567                 cam->vw.height = vw->height;
 568                 cam->params.roi.width = vw->width;
 569                 cam->params.roi.height = vw->height;
 570                 cpia2_set_format(cam);
 571         }
 572
 573         for (frame = 0; frame < cam->num_frames; ++frame) {
 574                 if (cam->buffers[frame].status == FRAME_READING)
 575                         if ((err = sync(cam, frame)) < 0)
 576                                 return err;
 577
 578                 cam->buffers[frame].status = FRAME_EMPTY;
 579         }
 580
 581         return 0;
 582 }
 583
 584 /******************************************************************************
 585  *
 586  *  ioctl_get_mbuf
 587  *
 588  *****************************************************************************/
 589 static int ioctl_get_mbuf(void *arg, struct camera_data *cam)
 590 {
 591         struct video_mbuf *vm;
 592         int i;
 593         vm = arg;
 594
 595         memset(vm, 0, sizeof(*vm));
 596         vm->size = cam->frame_size*cam->num_frames;
 597         vm->frames = cam->num_frames;
 598         for (i = 0; i < cam->num_frames; i++)
 599                 vm->offsets[i] = cam->frame_size * i;
 600
 601         return 0;
 602 }
 603
 604 /******************************************************************************
 605  *
 606  *  ioctl_mcapture
 607  *
 608  *****************************************************************************/
 609 static int ioctl_mcapture(void *arg, struct camera_data *cam,
 610                           struct cpia2_fh *fh)
 611 {
 612         struct video_mmap *vm;
 613         int video_size, err;
 614         vm = arg;
 615
 616         if (vm->frame < 0 || vm->frame >= cam->num_frames)
 617                 return -EINVAL;
 618
 619         /* set video size */
 620         video_size = cpia2_match_video_size(vm->width, vm->height);
 621         if (cam->video_size < 0) {
 622                 return -EINVAL;
 623         }
 624
 625         /* Ensure that only this process can change the format. */
 626         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
 627         if(err != 0)
 628                 return err;
 629
 630         if (video_size != cam->video_size) {
 631                 cam->video_size = video_size;
 632                 cam->params.roi.width = vm->width;
 633                 cam->params.roi.height = vm->height;
 634                 cpia2_set_format(cam);
 635         }
 636
 637         if (cam->buffers[vm->frame].status == FRAME_READING)
 638                 if ((err=sync(cam, vm->frame)) < 0)
 639                         return err;
 640
 641         cam->buffers[vm->frame].status = FRAME_EMPTY;
 642
 643         return cpia2_usb_stream_start(cam,cam->params.camera_state.stream_mode);
 644 }
 645
 646 /******************************************************************************
 647  *
 648  *  ioctl_sync
 649  *
 650  *****************************************************************************/
 651 static int ioctl_sync(void *arg, struct camera_data *cam)
 652 {
 653         int frame;
 654
 655         frame = *(int*)arg;
 656
 657         if (frame < 0 || frame >= cam->num_frames)
 658                 return -EINVAL;
 659
 660         return sync(cam, frame);
 661 }
 662
 663
 664 /******************************************************************************
 665  *
 666  *  ioctl_set_gpio
 667  *
 668  *****************************************************************************/
 669
 670 static int ioctl_set_gpio(void *arg, struct camera_data *cam)
 671 {
 672         __u32 gpio_val;
 673
 674         gpio_val = *(__u32*) arg;
 675
 676         if (gpio_val &~ 0xFFU)
 677                 return -EINVAL;
 678
 679         return cpia2_set_gpio(cam, (unsigned char)gpio_val);
 680 }
 681
 682 /******************************************************************************
 683  *
 684  *  ioctl_querycap
 685  *
 686  *  V4L2 device capabilities
 687  *
 688  *****************************************************************************/
 689
 690 static int ioctl_querycap(void *arg, struct camera_data *cam)
 691 {
 692         struct v4l2_capability *vc = arg;
 693
 694         memset(vc, 0, sizeof(*vc));
 695         strcpy(vc->driver, "cpia2");
 696
 697         if (cam->params.pnp_id.product == 0x151)
 698                 strcpy(vc->card, "QX5 Microscope");
 699         else
 700                 strcpy(vc->card, "CPiA2 Camera");
 701         switch (cam->params.pnp_id.device_type) {
 702         case DEVICE_STV_672:
 703                 strcat(vc->card, " (672/");
 704                 break;
 705         case DEVICE_STV_676:
 706                 strcat(vc->card, " (676/");
 707                 break;
 708         default:
 709                 strcat(vc->card, " (???/");
 710                 break;
 711         }
 712         switch (cam->params.version.sensor_flags) {
 713         case CPIA2_VP_SENSOR_FLAGS_404:
 714                 strcat(vc->card, "404)");
 715                 break;
 716         case CPIA2_VP_SENSOR_FLAGS_407:
 717                 strcat(vc->card, "407)");
 718                 break;
 719         case CPIA2_VP_SENSOR_FLAGS_409:
 720                 strcat(vc->card, "409)");
 721                 break;
 722         case CPIA2_VP_SENSOR_FLAGS_410:
 723                 strcat(vc->card, "410)");
 724                 break;
 725         case CPIA2_VP_SENSOR_FLAGS_500:
 726                 strcat(vc->card, "500)");
 727                 break;
 728         default:
 729                 strcat(vc->card, "???)");
 730                 break;
 731         }
 732
 733         if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0)
 734                 memset(vc->bus_info,0, sizeof(vc->bus_info));
 735
 736         vc->version = KERNEL_VERSION(CPIA2_MAJ_VER, CPIA2_MIN_VER,
 737                                      CPIA2_PATCH_VER);
 738
 739         vc->capabilities = V4L2_CAP_VIDEO_CAPTURE |
 740                            V4L2_CAP_READWRITE |
 741                            V4L2_CAP_STREAMING;
 742
 743         return 0;
 744 }
 745
 746 /******************************************************************************
 747  *
 748  *  ioctl_input
 749  *
 750  *  V4L2 input get/set/enumerate
 751  *
 752  *****************************************************************************/
 753
 754 static int ioctl_input(unsigned int ioclt_nr,void *arg,struct camera_data *cam)
 755 {
 756         struct v4l2_input *i = arg;
 757
 758         if(ioclt_nr  != VIDIOC_G_INPUT) {
 759                 if (i->index != 0)
 760                        return -EINVAL;
 761         }
 762
 763         memset(i, 0, sizeof(*i));
 764         strcpy(i->name, "Camera");
 765         i->type = V4L2_INPUT_TYPE_CAMERA;
 766
 767         return 0;
 768 }
 769
 770 /******************************************************************************
 771  *
 772  *  ioctl_enum_fmt
 773  *
 774  *  V4L2 format enumerate
 775  *
 776  *****************************************************************************/
 777
 778 static int ioctl_enum_fmt(void *arg,struct camera_data *cam)
 779 {
 780         struct v4l2_fmtdesc *f = arg;
 781         int index = f->index;
 782
 783         if (index < 0 || index > 1)
 784                return -EINVAL;
 785
 786         memset(f, 0, sizeof(*f));
 787         f->index = index;
 788         f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 789         f->flags = V4L2_FMT_FLAG_COMPRESSED;
 790         switch(index) {
 791         case 0:
 792                 strcpy(f->description, "MJPEG");
 793                 f->pixelformat = V4L2_PIX_FMT_MJPEG;
 794                 break;
 795         case 1:
 796                 strcpy(f->description, "JPEG");
 797                 f->pixelformat = V4L2_PIX_FMT_JPEG;
 798                 break;
 799         default:
 800                 return -EINVAL;
 801         }
 802
 803         return 0;
 804 }
 805
 806 /******************************************************************************
 807  *
 808  *  ioctl_try_fmt
 809  *
 810  *  V4L2 format try
 811  *
 812  *****************************************************************************/
 813
 814 static int ioctl_try_fmt(void *arg,struct camera_data *cam)
 815 {
 816         struct v4l2_format *f = arg;
 817
 818         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 819                return -EINVAL;
 820
 821         if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG &&
 822             f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
 823                return -EINVAL;
 824
 825         f->fmt.pix.field = V4L2_FIELD_NONE;
 826         f->fmt.pix.bytesperline = 0;
 827         f->fmt.pix.sizeimage = cam->frame_size;
 828         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 829         f->fmt.pix.priv = 0;
 830
 831         switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
 832         case VIDEOSIZE_VGA:
 833                 f->fmt.pix.width = 640;
 834                 f->fmt.pix.height = 480;
 835                 break;
 836         case VIDEOSIZE_CIF:
 837                 f->fmt.pix.width = 352;
 838                 f->fmt.pix.height = 288;
 839                 break;
 840         case VIDEOSIZE_QVGA:
 841                 f->fmt.pix.width = 320;
 842                 f->fmt.pix.height = 240;
 843                 break;
 844         case VIDEOSIZE_288_216:
 845                 f->fmt.pix.width = 288;
 846                 f->fmt.pix.height = 216;
 847                 break;
 848         case VIDEOSIZE_256_192:
 849                 f->fmt.pix.width = 256;
 850                 f->fmt.pix.height = 192;
 851                 break;
 852         case VIDEOSIZE_224_168:
 853                 f->fmt.pix.width = 224;
 854                 f->fmt.pix.height = 168;
 855                 break;
 856         case VIDEOSIZE_192_144:
 857                 f->fmt.pix.width = 192;
 858                 f->fmt.pix.height = 144;
 859                 break;
 860         case VIDEOSIZE_QCIF:
 861         default:
 862                 f->fmt.pix.width = 176;
 863                 f->fmt.pix.height = 144;
 864                 break;
 865         }
 866
 867         return 0;
 868 }
 869
 870 /******************************************************************************
 871  *
 872  *  ioctl_set_fmt
 873  *
 874  *  V4L2 format set
 875  *
 876  *****************************************************************************/
 877
 878 static int ioctl_set_fmt(void *arg,struct camera_data *cam, struct cpia2_fh *fh)
 879 {
 880         struct v4l2_format *f = arg;
 881         int err, frame;
 882
 883         err = ioctl_try_fmt(arg, cam);
 884         if(err != 0)
 885                 return err;
 886
 887         /* Ensure that only this process can change the format. */
 888         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
 889         if(err != 0) {
 890                 return err;
 891         }
 892
 893         cam->pixelformat = f->fmt.pix.pixelformat;
 894
 895         /* NOTE: This should be set to 1 for MJPEG, but some apps don't handle
 896          * the missing Huffman table properly. */
 897         cam->params.compression.inhibit_htables = 0;
 898                 /*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/
 899
 900         /* we set the video window to something smaller or equal to what
 901          * is requested by the user???
 902          */
 903         DBG("Requested width = %d, height = %d\n",
 904             f->fmt.pix.width, f->fmt.pix.height);
 905         if (f->fmt.pix.width != cam->vw.width ||
 906             f->fmt.pix.height != cam->vw.height) {
 907                 cam->vw.width = f->fmt.pix.width;
 908                 cam->vw.height = f->fmt.pix.height;
 909                 cam->params.roi.width = f->fmt.pix.width;
 910                 cam->params.roi.height = f->fmt.pix.height;
 911                 cpia2_set_format(cam);
 912         }
 913
 914         for (frame = 0; frame < cam->num_frames; ++frame) {
 915                 if (cam->buffers[frame].status == FRAME_READING)
 916                         if ((err = sync(cam, frame)) < 0)
 917                                 return err;
 918
 919                 cam->buffers[frame].status = FRAME_EMPTY;
 920         }
 921
 922         return 0;
 923 }
 924
 925 /******************************************************************************
 926  *
 927  *  ioctl_get_fmt
 928  *
 929  *  V4L2 format get
 930  *
 931  *****************************************************************************/
 932
 933 static int ioctl_get_fmt(void *arg,struct camera_data *cam)
 934 {
 935         struct v4l2_format *f = arg;
 936
 937         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 938                return -EINVAL;
 939
 940         f->fmt.pix.width = cam->vw.width;
 941         f->fmt.pix.height = cam->vw.height;
 942         f->fmt.pix.pixelformat = cam->pixelformat;
 943         f->fmt.pix.field = V4L2_FIELD_NONE;
 944         f->fmt.pix.bytesperline = 0;
 945         f->fmt.pix.sizeimage = cam->frame_size;
 946         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 947         f->fmt.pix.priv = 0;
 948
 949         return 0;
 950 }
 951
 952 /******************************************************************************
 953  *
 954  *  ioctl_cropcap
 955  *
 956  *  V4L2 query cropping capabilities
 957  *  NOTE: cropping is currently disabled
 958  *
 959  *****************************************************************************/
 960
 961 static int ioctl_cropcap(void *arg,struct camera_data *cam)
 962 {
 963         struct v4l2_cropcap *c = arg;
 964
 965         if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 966                return -EINVAL;
 967
 968         c->bounds.left = 0;
 969         c->bounds.top = 0;
 970         c->bounds.width = cam->vw.width;
 971         c->bounds.height = cam->vw.height;
 972         c->defrect.left = 0;
 973         c->defrect.top = 0;
 974         c->defrect.width = cam->vw.width;
 975         c->defrect.height = cam->vw.height;
 976         c->pixelaspect.numerator = 1;
 977         c->pixelaspect.denominator = 1;
 978
 979         return 0;
 980 }
 981
 982 /******************************************************************************
 983  *
 984  *  ioctl_queryctrl
 985  *
 986  *  V4L2 query possible control variables
 987  *
 988  *****************************************************************************/
 989
 990 static int ioctl_queryctrl(void *arg,struct camera_data *cam)
 991 {
 992         struct v4l2_queryctrl *c = arg;
 993         int i;
 994
 995         for(i=0; i<NUM_CONTROLS; ++i) {
 996                 if(c->id == controls[i].id) {
 997                         memcpy(c, controls+i, sizeof(*c));
 998                         break;
 999                 }
1000         }
1001
1002         if(i == NUM_CONTROLS)
1003                 return -EINVAL;
1004
1005         /* Some devices have additional limitations */
1006         switch(c->id) {
1007         case V4L2_CID_BRIGHTNESS:
1008                 /***
1009                  * Don't let the register be set to zero - bug in VP4
1010                  * flash of full brightness
1011                  ***/
1012                 if (cam->params.pnp_id.device_type == DEVICE_STV_672)
1013                         c->minimum = 1;
1014                 break;
1015         case V4L2_CID_VFLIP:
1016                 // VP5 Only
1017                 if(cam->params.pnp_id.device_type == DEVICE_STV_672)
1018                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
1019                 break;
1020         case CPIA2_CID_FRAMERATE:
1021                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
1022                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
1023                         // Maximum 15fps
1024                         for(i=0; i<c->maximum; ++i) {
1025                                 if(framerate_controls[i].value ==
1026                                    CPIA2_VP_FRAMERATE_15) {
1027                                         c->maximum = i;
1028                                         c->default_value = i;
1029                                 }
1030                         }
1031                 }
1032                 break;
1033         case CPIA2_CID_FLICKER_MODE:
1034                 // Flicker control only valid for 672.
1035                 if(cam->params.pnp_id.device_type != DEVICE_STV_672)
1036                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
1037                 break;
1038         case CPIA2_CID_LIGHTS:
1039                 // Light control only valid for the QX5 Microscope.
1040                 if(cam->params.pnp_id.product != 0x151)
1041                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
1042                 break;
1043         default:
1044                 break;
1045         }
1046
1047         return 0;
1048 }
1049
1050 /******************************************************************************
1051  *
1052  *  ioctl_querymenu
1053  *
1054  *  V4L2 query possible control variables
1055  *
1056  *****************************************************************************/
1057
1058 static int ioctl_querymenu(void *arg,struct camera_data *cam)
1059 {
1060         struct v4l2_querymenu *m = arg;
1061
1062         memset(m->name, 0, sizeof(m->name));
1063         m->reserved = 0;
1064
1065         switch(m->id) {
1066         case CPIA2_CID_FLICKER_MODE:
1067                 if(m->index < 0 || m->index >= NUM_FLICKER_CONTROLS)
1068                         return -EINVAL;
1069
1070                 strcpy(m->name, flicker_controls[m->index].name);
1071                 break;
1072         case CPIA2_CID_FRAMERATE:
1073             {
1074                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
1075                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
1076                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
1077                         // Maximum 15fps
1078                         int i;
1079                         for(i=0; i<maximum; ++i) {
1080                                 if(framerate_controls[i].value ==
1081                                    CPIA2_VP_FRAMERATE_15)
1082                                         maximum = i;
1083                         }
1084                 }
1085                 if(m->index < 0 || m->index > maximum)
1086                         return -EINVAL;
1087
1088                 strcpy(m->name, framerate_controls[m->index].name);
1089                 break;
1090             }
1091         case CPIA2_CID_LIGHTS:
1092                 if(m->index < 0 || m->index >= NUM_LIGHTS_CONTROLS)
1093                         return -EINVAL;
1094
1095                 strcpy(m->name, lights_controls[m->index].name);
1096                 break;
1097         default:
1098                 return -EINVAL;
1099         }
1100
1101         return 0;
1102 }
1103
1104 /******************************************************************************
1105  *
1106  *  ioctl_g_ctrl
1107  *
1108  *  V4L2 get the value of a control variable
1109  *
1110  *****************************************************************************/
1111
1112 static int ioctl_g_ctrl(void *arg,struct camera_data *cam)
1113 {
1114         struct v4l2_control *c = arg;
1115
1116         switch(c->id) {
1117         case V4L2_CID_BRIGHTNESS:
1118                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_BRIGHTNESS,
1119                                  TRANSFER_READ, 0);
1120                 c->value = cam->params.color_params.brightness;
1121                 break;
1122         case V4L2_CID_CONTRAST:
1123                 cpia2_do_command(cam, CPIA2_CMD_GET_CONTRAST,
1124                                  TRANSFER_READ, 0);
1125                 c->value = cam->params.color_params.contrast;
1126                 break;
1127         case V4L2_CID_SATURATION:
1128                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_SATURATION,
1129                                  TRANSFER_READ, 0);
1130                 c->value = cam->params.color_params.saturation;
1131                 break;
1132         case V4L2_CID_HFLIP:
1133                 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
1134                                  TRANSFER_READ, 0);
1135                 c->value = (cam->params.vp_params.user_effects &
1136                             CPIA2_VP_USER_EFFECTS_MIRROR) != 0;
1137                 break;
1138         case V4L2_CID_VFLIP:
1139                 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
1140                                  TRANSFER_READ, 0);
1141                 c->value = (cam->params.vp_params.user_effects &
1142                             CPIA2_VP_USER_EFFECTS_FLIP) != 0;
1143                 break;
1144         case CPIA2_CID_TARGET_KB:
1145                 c->value = cam->params.vc_params.target_kb;
1146                 break;
1147         case CPIA2_CID_GPIO:
1148                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
1149                                  TRANSFER_READ, 0);
1150                 c->value = cam->params.vp_params.gpio_data;
1151                 break;
1152         case CPIA2_CID_FLICKER_MODE:
1153         {
1154                 int i, mode;
1155                 cpia2_do_command(cam, CPIA2_CMD_GET_FLICKER_MODES,
1156                                  TRANSFER_READ, 0);
1157                 if(cam->params.flicker_control.cam_register &
1158                    CPIA2_VP_FLICKER_MODES_NEVER_FLICKER) {
1159                         mode = NEVER_FLICKER;
1160                 } else {
1161                     if(cam->params.flicker_control.cam_register &
1162                        CPIA2_VP_FLICKER_MODES_50HZ) {
1163                         mode = FLICKER_50;
1164                     } else {
1165                         mode = FLICKER_60;
1166                     }
1167                 }
1168                 for(i=0; i<NUM_FLICKER_CONTROLS; i++) {
1169                         if(flicker_controls[i].value == mode) {
1170                                 c->value = i;
1171                                 break;
1172                         }
1173                 }
1174                 if(i == NUM_FLICKER_CONTROLS)
1175                         return -EINVAL;
1176                 break;
1177         }
1178         case CPIA2_CID_FRAMERATE:
1179         {
1180                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
1181                 int i;
1182                 for(i=0; i<= maximum; i++) {
1183                         if(cam->params.vp_params.frame_rate ==
1184                            framerate_controls[i].value)
1185                                 break;
1186                 }
1187                 if(i > maximum)
1188                         return -EINVAL;
1189                 c->value = i;
1190                 break;
1191         }
1192         case CPIA2_CID_USB_ALT:
1193                 c->value = cam->params.camera_state.stream_mode;
1194                 break;
1195         case CPIA2_CID_LIGHTS:
1196         {
1197                 int i;
1198                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
1199                                  TRANSFER_READ, 0);
1200                 for(i=0; i<NUM_LIGHTS_CONTROLS; i++) {
1201                         if((cam->params.vp_params.gpio_data&GPIO_LIGHTS_MASK) ==
1202                            lights_controls[i].value) {
1203                                 break;
1204                         }
1205                 }
1206                 if(i == NUM_LIGHTS_CONTROLS)
1207                         return -EINVAL;
1208                 c->value = i;
1209                 break;
1210         }
1211         case CPIA2_CID_RESET_CAMERA:
1212                 return -EINVAL;
1213         default:
1214                 return -EINVAL;
1215         }
1216
1217         DBG("Get control id:%d, value:%d\n", c->id, c->value);
1218
1219         return 0;
1220 }
1221
1222 /******************************************************************************
1223  *
1224  *  ioctl_s_ctrl
1225  *
1226  *  V4L2 set the value of a control variable
1227  *
1228  *****************************************************************************/
1229
1230 static int ioctl_s_ctrl(void *arg,struct camera_data *cam)
1231 {
1232         struct v4l2_control *c = arg;
1233         int i;
1234         int retval = 0;
1235
1236         DBG("Set control id:%d, value:%d\n", c->id, c->value);
1237
1238         /* Check that the value is in range */
1239         for(i=0; i<NUM_CONTROLS; i++) {
1240                 if(c->id == controls[i].id) {
1241                         if(c->value < controls[i].minimum ||
1242                            c->value > controls[i].maximum) {
1243                                 return -EINVAL;
1244                         }
1245                         break;
1246                 }
1247         }
1248         if(i == NUM_CONTROLS)
1249                 return -EINVAL;
1250
1251         switch(c->id) {
1252         case V4L2_CID_BRIGHTNESS:
1253                 cpia2_set_brightness(cam, c->value);
1254                 break;
1255         case V4L2_CID_CONTRAST:
1256                 cpia2_set_contrast(cam, c->value);
1257                 break;
1258         case V4L2_CID_SATURATION:
1259                 cpia2_set_saturation(cam, c->value);
1260                 break;
1261         case V4L2_CID_HFLIP:
1262                 cpia2_set_property_mirror(cam, c->value);
1263                 break;
1264         case V4L2_CID_VFLIP:
1265                 cpia2_set_property_flip(cam, c->value);
1266                 break;
1267         case CPIA2_CID_TARGET_KB:
1268                 retval = cpia2_set_target_kb(cam, c->value);
1269                 break;
1270         case CPIA2_CID_GPIO:
1271                 retval = cpia2_set_gpio(cam, c->value);
1272                 break;
1273         case CPIA2_CID_FLICKER_MODE:
1274                 retval = cpia2_set_flicker_mode(cam,
1275                                               flicker_controls[c->value].value);
1276                 break;
1277         case CPIA2_CID_FRAMERATE:
1278                 retval = cpia2_set_fps(cam, framerate_controls[c->value].value);
1279                 break;
1280         case CPIA2_CID_USB_ALT:
1281                 retval = cpia2_usb_change_streaming_alternate(cam, c->value);
1282                 break;
1283         case CPIA2_CID_LIGHTS:
1284                 retval = cpia2_set_gpio(cam, lights_controls[c->value].value);
1285                 break;
1286         case CPIA2_CID_RESET_CAMERA:
1287                 cpia2_usb_stream_pause(cam);
1288                 cpia2_reset_camera(cam);
1289                 cpia2_usb_stream_resume(cam);
1290                 break;
1291         default:
1292                 retval = -EINVAL;
1293         }
1294
1295         return retval;
1296 }
1297
1298 /******************************************************************************
1299  *
1300  *  ioctl_g_jpegcomp
1301  *
1302  *  V4L2 get the JPEG compression parameters
1303  *
1304  *****************************************************************************/
1305
1306 static int ioctl_g_jpegcomp(void *arg,struct camera_data *cam)
1307 {
1308         struct v4l2_jpegcompression *parms = arg;
1309
1310         memset(parms, 0, sizeof(*parms));
1311
1312         parms->quality = 80; // TODO: Can this be made meaningful?
1313
1314         parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI;
1315         if(!cam->params.compression.inhibit_htables) {
1316                 parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT;
1317         }
1318
1319         parms->APPn = cam->APPn;
1320         parms->APP_len = cam->APP_len;
1321         if(cam->APP_len > 0) {
1322                 memcpy(parms->APP_data, cam->APP_data, cam->APP_len);
1323                 parms->jpeg_markers |= V4L2_JPEG_MARKER_APP;
1324         }
1325
1326         parms->COM_len = cam->COM_len;
1327         if(cam->COM_len > 0) {
1328                 memcpy(parms->COM_data, cam->COM_data, cam->COM_len);
1329                 parms->jpeg_markers |= JPEG_MARKER_COM;
1330         }
1331
1332         DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n",
1333             parms->APP_len, parms->COM_len);
1334
1335         return 0;
1336 }
1337
1338 /******************************************************************************
1339  *
1340  *  ioctl_s_jpegcomp
1341  *
1342  *  V4L2 set the JPEG compression parameters
1343  *  NOTE: quality and some jpeg_markers are ignored.
1344  *
1345  *****************************************************************************/
1346
1347 static int ioctl_s_jpegcomp(void *arg,struct camera_data *cam)
1348 {
1349         struct v4l2_jpegcompression *parms = arg;
1350
1351         DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n",
1352             parms->APP_len, parms->COM_len);
1353
1354         cam->params.compression.inhibit_htables =
1355                 !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
1356
1357         if(parms->APP_len != 0) {
1358                 if(parms->APP_len > 0 &&
1359                    parms->APP_len <= sizeof(cam->APP_data) &&
1360                    parms->APPn >= 0 && parms->APPn <= 15) {
1361                         cam->APPn = parms->APPn;
1362                         cam->APP_len = parms->APP_len;
1363                         memcpy(cam->APP_data, parms->APP_data, parms->APP_len);
1364                 } else {
1365                         LOG("Bad APPn Params n=%d len=%d\n",
1366                             parms->APPn, parms->APP_len);
1367                         return -EINVAL;
1368                 }
1369         } else {
1370                 cam->APP_len = 0;
1371         }
1372
1373         if(parms->COM_len != 0) {
1374                 if(parms->COM_len > 0 &&
1375                    parms->COM_len <= sizeof(cam->COM_data)) {
1376                         cam->COM_len = parms->COM_len;
1377                         memcpy(cam->COM_data, parms->COM_data, parms->COM_len);
1378                 } else {
1379                         LOG("Bad COM_len=%d\n", parms->COM_len);
1380                         return -EINVAL;
1381                 }
1382         }
1383
1384         return 0;
1385 }
1386
1387 /******************************************************************************
1388  *
1389  *  ioctl_reqbufs
1390  *
1391  *  V4L2 Initiate memory mapping.
1392  *  NOTE: The user's request is ignored. For now the buffers are fixed.
1393  *
1394  *****************************************************************************/
1395
1396 static int ioctl_reqbufs(void *arg,struct camera_data *cam)
1397 {
1398         struct v4l2_requestbuffers *req = arg;
1399
1400         if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1401            req->memory != V4L2_MEMORY_MMAP)
1402                 return -EINVAL;
1403
1404         DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames);
1405         req->count = cam->num_frames;
1406         memset(&req->reserved, 0, sizeof(req->reserved));
1407
1408         return 0;
1409 }
1410
1411 /******************************************************************************
1412  *
1413  *  ioctl_querybuf
1414  *
1415  *  V4L2 Query memory buffer status.
1416  *
1417  *****************************************************************************/
1418
1419 static int ioctl_querybuf(void *arg,struct camera_data *cam)
1420 {
1421         struct v4l2_buffer *buf = arg;
1422
1423         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1424            buf->index > cam->num_frames)
1425                 return -EINVAL;
1426
1427         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1428         buf->length = cam->frame_size;
1429
1430         buf->memory = V4L2_MEMORY_MMAP;
1431
1432         if(cam->mmapped)
1433                 buf->flags = V4L2_BUF_FLAG_MAPPED;
1434         else
1435                 buf->flags = 0;
1436
1437         switch (cam->buffers[buf->index].status) {
1438         case FRAME_EMPTY:
1439         case FRAME_ERROR:
1440         case FRAME_READING:
1441                 buf->bytesused = 0;
1442                 buf->flags = V4L2_BUF_FLAG_QUEUED;
1443                 break;
1444         case FRAME_READY:
1445                 buf->bytesused = cam->buffers[buf->index].length;
1446                 buf->timestamp = cam->buffers[buf->index].timestamp;
1447                 buf->sequence = cam->buffers[buf->index].seq;
1448                 buf->flags = V4L2_BUF_FLAG_DONE;
1449                 break;
1450         }
1451
1452         DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n",
1453              buf->index, buf->m.offset, buf->flags, buf->sequence,
1454              buf->bytesused);
1455
1456         return 0;
1457 }
1458
1459 /******************************************************************************
1460  *
1461  *  ioctl_qbuf
1462  *
1463  *  V4L2 User is freeing buffer
1464  *
1465  *****************************************************************************/
1466
1467 static int ioctl_qbuf(void *arg,struct camera_data *cam)
1468 {
1469         struct v4l2_buffer *buf = arg;
1470
1471         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1472            buf->memory != V4L2_MEMORY_MMAP ||
1473            buf->index > cam->num_frames)
1474                 return -EINVAL;
1475
1476         DBG("QBUF #%d\n", buf->index);
1477
1478         if(cam->buffers[buf->index].status == FRAME_READY)
1479                 cam->buffers[buf->index].status = FRAME_EMPTY;
1480
1481         return 0;
1482 }
1483
1484 /******************************************************************************
1485  *
1486  *  find_earliest_filled_buffer
1487  *
1488  *  Helper for ioctl_dqbuf. Find the next ready buffer.
1489  *
1490  *****************************************************************************/
1491
1492 static int find_earliest_filled_buffer(struct camera_data *cam)
1493 {
1494         int i;
1495         int found = -1;
1496         for (i=0; i<cam->num_frames; i++) {
1497                 if(cam->buffers[i].status == FRAME_READY) {
1498                         if(found < 0) {
1499                                 found = i;
1500                         } else {
1501                                 /* find which buffer is earlier */
1502                                 struct timeval *tv1, *tv2;
1503                                 tv1 = &cam->buffers[i].timestamp;
1504                                 tv2 = &cam->buffers[found].timestamp;
1505                                 if(tv1->tv_sec < tv2->tv_sec ||
1506                                    (tv1->tv_sec == tv2->tv_sec &&
1507                                     tv1->tv_usec < tv2->tv_usec))
1508                                         found = i;
1509                         }
1510                 }
1511         }
1512         return found;
1513 }
1514
1515 /******************************************************************************
1516  *
1517  *  ioctl_dqbuf
1518  *
1519  *  V4L2 User is asking for a filled buffer.
1520  *
1521  *****************************************************************************/
1522
1523 static int ioctl_dqbuf(void *arg,struct camera_data *cam, struct file *file)
1524 {
1525         struct v4l2_buffer *buf = arg;
1526         int frame;
1527
1528         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1529            buf->memory != V4L2_MEMORY_MMAP)
1530                 return -EINVAL;
1531
1532         frame = find_earliest_filled_buffer(cam);
1533
1534         if(frame < 0 && file->f_flags&O_NONBLOCK)
1535                 return -EAGAIN;
1536
1537         if(frame < 0) {
1538                 /* Wait for a frame to become available */
1539                 struct framebuf *cb=cam->curbuff;
1540                 mutex_unlock(&cam->busy_lock);
1541                 wait_event_interruptible(cam->wq_stream,
1542                                          !cam->present ||
1543                                          (cb=cam->curbuff)->status == FRAME_READY);
1544                 mutex_lock(&cam->busy_lock);
1545                 if (signal_pending(current))
1546                         return -ERESTARTSYS;
1547                 if(!cam->present)
1548                         return -ENOTTY;
1549                 frame = cb->num;
1550         }
1551
1552
1553         buf->index = frame;
1554         buf->bytesused = cam->buffers[buf->index].length;
1555         buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE;
1556         buf->field = V4L2_FIELD_NONE;
1557         buf->timestamp = cam->buffers[buf->index].timestamp;
1558         buf->sequence = cam->buffers[buf->index].seq;
1559         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1560         buf->length = cam->frame_size;
1561         buf->input = 0;
1562         buf->reserved = 0;
1563         memset(&buf->timecode, 0, sizeof(buf->timecode));
1564
1565         DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index,
1566             cam->buffers[buf->index].status, buf->sequence, buf->bytesused);
1567
1568         return 0;
1569 }
1570
1571 /******************************************************************************
1572  *
1573  *  cpia2_ioctl
1574  *
1575  *****************************************************************************/
1576 static long cpia2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
1577 {
1578         struct camera_data *cam = video_drvdata(file);
1579         long retval = 0;
1580
1581         if (!cam)
1582                 return -ENOTTY;
1583
1584         /* make this _really_ smp-safe */
1585         if (mutex_lock_interruptible(&cam->busy_lock))
1586                 return -ERESTARTSYS;
1587
1588         if (!cam->present) {
1589                 mutex_unlock(&cam->busy_lock);
1590                 return -ENODEV;
1591         }
1592
1593         /* Priority check */
1594         switch (cmd) {
1595         case VIDIOCSWIN:
1596         case VIDIOCMCAPTURE:
1597         case VIDIOC_S_FMT:
1598         {
1599                 struct cpia2_fh *fh = file->private_data;
1600                 retval = v4l2_prio_check(&cam->prio, &fh->prio);
1601                 if(retval) {
1602                         mutex_unlock(&cam->busy_lock);
1603                         return retval;
1604                 }
1605                 break;
1606         }
1607         case VIDIOCGMBUF:
1608         case VIDIOCSYNC:
1609         {
1610                 struct cpia2_fh *fh = file->private_data;
1611                 if(fh->prio != V4L2_PRIORITY_RECORD) {
1612                         mutex_unlock(&cam->busy_lock);
1613                         return -EBUSY;
1614                 }
1615                 break;
1616         }
1617         default:
1618                 break;
1619         }
1620
1621         switch (cmd) {
1622         case VIDIOCGCAP:        /* query capabilities */
1623                 retval = ioctl_cap_query(arg, cam);
1624                 break;
1625
1626         case VIDIOCGCHAN:       /* get video source - we are a camera, nothing else */
1627                 retval = ioctl_get_channel(arg);
1628                 break;
1629         case VIDIOCSCHAN:       /* set video source - we are a camera, nothing else */
1630                 retval = ioctl_set_channel(arg);
1631                 break;
1632         case VIDIOCGPICT:       /* image properties */
1633                 memcpy(arg, &cam->vp, sizeof(struct video_picture));
1634                 break;
1635         case VIDIOCSPICT:
1636                 retval = ioctl_set_image_prop(arg, cam);
1637                 break;
1638         case VIDIOCGWIN:        /* get/set capture window */
1639                 memcpy(arg, &cam->vw, sizeof(struct video_window));
1640                 break;
1641         case VIDIOCSWIN:
1642                 retval = ioctl_set_window_size(arg, cam, file->private_data);
1643                 break;
1644         case VIDIOCGMBUF:       /* mmap interface */
1645                 retval = ioctl_get_mbuf(arg, cam);
1646                 break;
1647         case VIDIOCMCAPTURE:
1648                 retval = ioctl_mcapture(arg, cam, file->private_data);
1649                 break;
1650         case VIDIOCSYNC:
1651                 retval = ioctl_sync(arg, cam);
1652                 break;
1653                 /* pointless to implement overlay with this camera */
1654         case VIDIOCCAPTURE:
1655         case VIDIOCGFBUF:
1656         case VIDIOCSFBUF:
1657         case VIDIOCKEY:
1658                 retval = -EINVAL;
1659                 break;
1660
1661                 /* tuner interface - we have none */
1662         case VIDIOCGTUNER:
1663         case VIDIOCSTUNER:
1664         case VIDIOCGFREQ:
1665         case VIDIOCSFREQ:
1666                 retval = -EINVAL;
1667                 break;
1668
1669                 /* audio interface - we have none */
1670         case VIDIOCGAUDIO:
1671         case VIDIOCSAUDIO:
1672                 retval = -EINVAL;
1673                 break;
1674
1675         /* CPIA2 extension to Video4Linux API */
1676         case CPIA2_IOC_SET_GPIO:
1677                 retval = ioctl_set_gpio(arg, cam);
1678                 break;
1679         case VIDIOC_QUERYCAP:
1680                 retval = ioctl_querycap(arg,cam);
1681                 break;
1682
1683         case VIDIOC_ENUMINPUT:
1684         case VIDIOC_G_INPUT:
1685         case VIDIOC_S_INPUT:
1686                 retval = ioctl_input(cmd, arg, cam);
1687                 break;
1688
1689         case VIDIOC_ENUM_FMT:
1690                 retval = ioctl_enum_fmt(arg,cam);
1691                 break;
1692         case VIDIOC_TRY_FMT:
1693                 retval = ioctl_try_fmt(arg,cam);
1694                 break;
1695         case VIDIOC_G_FMT:
1696                 retval = ioctl_get_fmt(arg,cam);
1697                 break;
1698         case VIDIOC_S_FMT:
1699                 retval = ioctl_set_fmt(arg,cam,file->private_data);
1700                 break;
1701
1702         case VIDIOC_CROPCAP:
1703                 retval = ioctl_cropcap(arg,cam);
1704                 break;
1705         case VIDIOC_G_CROP:
1706         case VIDIOC_S_CROP:
1707                 // TODO: I think cropping can be implemented - SJB
1708                 retval = -EINVAL;
1709                 break;
1710
1711         case VIDIOC_QUERYCTRL:
1712                 retval = ioctl_queryctrl(arg,cam);
1713                 break;
1714         case VIDIOC_QUERYMENU:
1715                 retval = ioctl_querymenu(arg,cam);
1716                 break;
1717         case VIDIOC_G_CTRL:
1718                 retval = ioctl_g_ctrl(arg,cam);
1719                 break;
1720         case VIDIOC_S_CTRL:
1721                 retval = ioctl_s_ctrl(arg,cam);
1722                 break;
1723
1724         case VIDIOC_G_JPEGCOMP:
1725                 retval = ioctl_g_jpegcomp(arg,cam);
1726                 break;
1727         case VIDIOC_S_JPEGCOMP:
1728                 retval = ioctl_s_jpegcomp(arg,cam);
1729                 break;
1730
1731         case VIDIOC_G_PRIORITY:
1732         {
1733                 struct cpia2_fh *fh = file->private_data;
1734                 *(enum v4l2_priority*)arg = fh->prio;
1735                 break;
1736         }
1737         case VIDIOC_S_PRIORITY:
1738         {
1739                 struct cpia2_fh *fh = file->private_data;
1740                 enum v4l2_priority prio;
1741                 prio = *(enum v4l2_priority*)arg;
1742                 if(cam->streaming &&
1743                    prio != fh->prio &&
1744                    fh->prio == V4L2_PRIORITY_RECORD) {
1745                         /* Can't drop record priority while streaming */
1746                         retval = -EBUSY;
1747                 } else if(prio == V4L2_PRIORITY_RECORD &&
1748                    prio != fh->prio &&
1749                    v4l2_prio_max(&cam->prio) == V4L2_PRIORITY_RECORD) {
1750                         /* Only one program can record at a time */
1751                         retval = -EBUSY;
1752                 } else {
1753                         retval = v4l2_prio_change(&cam->prio, &fh->prio, prio);
1754                 }
1755                 break;
1756         }
1757
1758         case VIDIOC_REQBUFS:
1759                 retval = ioctl_reqbufs(arg,cam);
1760                 break;
1761         case VIDIOC_QUERYBUF:
1762                 retval = ioctl_querybuf(arg,cam);
1763                 break;
1764         case VIDIOC_QBUF:
1765                 retval = ioctl_qbuf(arg,cam);
1766                 break;
1767         case VIDIOC_DQBUF:
1768                 retval = ioctl_dqbuf(arg,cam,file);
1769                 break;
1770         case VIDIOC_STREAMON:
1771         {
1772                 int type;
1773                 DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming);
1774                 type = *(int*)arg;
1775                 if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1776                         retval = -EINVAL;
1777
1778                 if(!cam->streaming) {
1779                         retval = cpia2_usb_stream_start(cam,
1780                                           cam->params.camera_state.stream_mode);
1781                 } else {
1782                         retval = -EINVAL;
1783                 }
1784
1785                 break;
1786         }
1787         case VIDIOC_STREAMOFF:
1788         {
1789                 int type;
1790                 DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming);
1791                 type = *(int*)arg;
1792                 if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1793                         retval = -EINVAL;
1794
1795                 if(cam->streaming) {
1796                         retval = cpia2_usb_stream_stop(cam);
1797                 } else {
1798                         retval = -EINVAL;
1799                 }
1800
1801                 break;
1802         }
1803
1804         case VIDIOC_ENUMOUTPUT:
1805         case VIDIOC_G_OUTPUT:
1806         case VIDIOC_S_OUTPUT:
1807         case VIDIOC_G_MODULATOR:
1808         case VIDIOC_S_MODULATOR:
1809
1810         case VIDIOC_ENUMAUDIO:
1811         case VIDIOC_G_AUDIO:
1812         case VIDIOC_S_AUDIO:
1813
1814         case VIDIOC_ENUMAUDOUT:
1815         case VIDIOC_G_AUDOUT:
1816         case VIDIOC_S_AUDOUT:
1817
1818         case VIDIOC_ENUMSTD:
1819         case VIDIOC_QUERYSTD:
1820         case VIDIOC_G_STD:
1821         case VIDIOC_S_STD:
1822
1823         case VIDIOC_G_TUNER:
1824         case VIDIOC_S_TUNER:
1825         case VIDIOC_G_FREQUENCY:
1826         case VIDIOC_S_FREQUENCY:
1827
1828         case VIDIOC_OVERLAY:
1829         case VIDIOC_G_FBUF:
1830         case VIDIOC_S_FBUF:
1831
1832         case VIDIOC_G_PARM:
1833         case VIDIOC_S_PARM:
1834                 retval = -EINVAL;
1835                 break;
1836         default:
1837                 retval = -ENOIOCTLCMD;
1838                 break;
1839         }
1840
1841         mutex_unlock(&cam->busy_lock);
1842         return retval;
1843 }
1844
1845 static long cpia2_ioctl(struct file *file,
1846                        unsigned int cmd, unsigned long arg)
1847 {
1848         return video_usercopy(file, cmd, arg, cpia2_do_ioctl);
1849 }
1850
1851 /******************************************************************************
1852  *
1853  *  cpia2_mmap
1854  *
1855  *****************************************************************************/
1856 static int cpia2_mmap(struct file *file, struct vm_area_struct *area)
1857 {
1858         struct camera_data *cam = video_drvdata(file);
1859         int retval;
1860
1861         /* Priority check */
1862         struct cpia2_fh *fh = file->private_data;
1863         if(fh->prio != V4L2_PRIORITY_RECORD) {
1864                 return -EBUSY;
1865         }
1866
1867         retval = cpia2_remap_buffer(cam, area);
1868
1869         if(!retval)
1870                 fh->mmapped = 1;
1871         return retval;
1872 }
1873
1874 /******************************************************************************
1875  *
1876  *  reset_camera_struct_v4l
1877  *
1878  *  Sets all values to the defaults
1879  *****************************************************************************/
1880 static void reset_camera_struct_v4l(struct camera_data *cam)
1881 {
1882         /***
1883          * Fill in the v4l structures.  video_cap is filled in inside the VIDIOCCAP
1884          * Ioctl.  Here, just do the window and picture stucts.
1885          ***/
1886         cam->vp.palette = (u16) VIDEO_PALETTE_RGB24;    /* Is this right? */
1887         cam->vp.brightness = (u16) cam->params.color_params.brightness * 256;
1888         cam->vp.colour = (u16) cam->params.color_params.saturation * 256;
1889         cam->vp.contrast = (u16) cam->params.color_params.contrast * 256;
1890
1891         cam->vw.x = 0;
1892         cam->vw.y = 0;
1893         cam->vw.width = cam->params.roi.width;
1894         cam->vw.height = cam->params.roi.height;
1895         cam->vw.flags = 0;
1896         cam->vw.clipcount = 0;
1897
1898         cam->frame_size = buffer_size;
1899         cam->num_frames = num_buffers;
1900
1901         /* FlickerModes */
1902         cam->params.flicker_control.flicker_mode_req = flicker_mode;
1903         cam->params.flicker_control.mains_frequency = flicker_freq;
1904
1905         /* streamMode */
1906         cam->params.camera_state.stream_mode = alternate;
1907
1908         cam->pixelformat = V4L2_PIX_FMT_JPEG;
1909         v4l2_prio_init(&cam->prio);
1910         return;
1911 }
1912
1913 /***
1914  * The v4l video device structure initialized for this device
1915  ***/
1916 static const struct v4l2_file_operations fops_template = {
1917         .owner          = THIS_MODULE,
1918         .open           = cpia2_open,
1919         .release        = cpia2_close,
1920         .read           = cpia2_v4l_read,
1921         .poll           = cpia2_v4l_poll,
1922         .ioctl          = cpia2_ioctl,
1923         .mmap           = cpia2_mmap,
1924 };
1925
1926 static struct video_device cpia2_template = {
1927         /* I could not find any place for the old .initialize initializer?? */
1928         .name=          "CPiA2 Camera",
1929         .minor=         -1,
1930         .fops=          &fops_template,
1931         .release=       video_device_release,
1932 };
1933
1934 /******************************************************************************
1935  *
1936  *  cpia2_register_camera
1937  *
1938  *****************************************************************************/
1939 int cpia2_register_camera(struct camera_data *cam)
1940 {
1941         cam->vdev = video_device_alloc();
1942         if(!cam->vdev)
1943                 return -ENOMEM;
1944
1945         memcpy(cam->vdev, &cpia2_template, sizeof(cpia2_template));
1946         video_set_drvdata(cam->vdev, cam);
1947
1948         reset_camera_struct_v4l(cam);
1949
1950         /* register v4l device */
1951         if (video_register_device(cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
1952                 ERR("video_register_device failed\n");
1953                 video_device_release(cam->vdev);
1954                 return -ENODEV;
1955         }
1956
1957         return 0;
1958 }
1959
1960 /******************************************************************************
1961  *
1962  *  cpia2_unregister_camera
1963  *
1964  *****************************************************************************/
1965 void cpia2_unregister_camera(struct camera_data *cam)
1966 {
1967         if (!cam->open_count) {
1968                 video_unregister_device(cam->vdev);
1969         } else {
1970                 LOG("/dev/video%d removed while open, "
1971                     "deferring video_unregister_device\n",
1972                     cam->vdev->num);
1973         }
1974 }
1975
1976 /******************************************************************************
1977  *
1978  *  check_parameters
1979  *
1980  *  Make sure that all user-supplied parameters are sensible
1981  *****************************************************************************/
1982 static void __init check_parameters(void)
1983 {
1984         if(buffer_size < PAGE_SIZE) {
1985                 buffer_size = PAGE_SIZE;
1986                 LOG("buffer_size too small, setting to %d\n", buffer_size);
1987         } else if(buffer_size > 1024*1024) {
1988                 /* arbitrary upper limiit */
1989                 buffer_size = 1024*1024;
1990                 LOG("buffer_size ridiculously large, setting to %d\n",
1991                     buffer_size);
1992         } else {
1993                 buffer_size += PAGE_SIZE-1;
1994                 buffer_size &= ~(PAGE_SIZE-1);
1995         }
1996
1997         if(num_buffers < 1) {
1998                 num_buffers = 1;
1999                 LOG("num_buffers too small, setting to %d\n", num_buffers);
2000         } else if(num_buffers > VIDEO_MAX_FRAME) {
2001                 num_buffers = VIDEO_MAX_FRAME;
2002                 LOG("num_buffers too large, setting to %d\n", num_buffers);
2003         }
2004
2005         if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) {
2006                 alternate = DEFAULT_ALT;
2007                 LOG("alternate specified is invalid, using %d\n", alternate);
2008         }
2009
2010         if (flicker_mode != NEVER_FLICKER && flicker_mode != ANTI_FLICKER_ON) {
2011                 flicker_mode = NEVER_FLICKER;
2012                 LOG("Flicker mode specified is invalid, using %d\n",
2013                     flicker_mode);
2014         }
2015
2016         if (flicker_freq != FLICKER_50 && flicker_freq != FLICKER_60) {
2017                 flicker_freq = FLICKER_60;
2018                 LOG("Flicker mode specified is invalid, using %d\n",
2019                     flicker_freq);
2020         }
2021
2022         if(video_nr < -1 || video_nr > 64) {
2023                 video_nr = -1;
2024                 LOG("invalid video_nr specified, must be -1 to 64\n");
2025         }
2026
2027         DBG("Using %d buffers, each %d bytes, alternate=%d\n",
2028             num_buffers, buffer_size, alternate);
2029 }
2030
2031 /************   Module Stuff ***************/
2032
2033
2034 /******************************************************************************
2035  *
2036  * cpia2_init/module_init
2037  *
2038  *****************************************************************************/
2039 static int __init cpia2_init(void)
2040 {
2041         LOG("%s v%d.%d.%d\n",
2042             ABOUT, CPIA2_MAJ_VER, CPIA2_MIN_VER, CPIA2_PATCH_VER);
2043         check_parameters();
2044         cpia2_usb_init();
2045         return 0;
2046 }
2047
2048
2049 /******************************************************************************
2050  *
2051  * cpia2_exit/module_exit
2052  *
2053  *****************************************************************************/
2054 static void __exit cpia2_exit(void)
2055 {
2056         cpia2_usb_cleanup();
2057         schedule_timeout(2 * HZ);
2058 }
2059
2060 module_init(cpia2_init);
2061 module_exit(cpia2_exit);
2062