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@redhat.com>
  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/moduleparam.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 #ifndef VID_HARDWARE_CPIA2
  91 #error "VID_HARDWARE_CPIA2 should have been defined in linux/videodev.h"
  92 #endif
  93
  94 struct control_menu_info {
  95         int value;
  96         char name[32];
  97 };
  98
  99 static struct control_menu_info framerate_controls[] =
 100 {
 101         { CPIA2_VP_FRAMERATE_6_25, "6.25 fps" },
 102         { CPIA2_VP_FRAMERATE_7_5,  "7.5 fps"  },
 103         { CPIA2_VP_FRAMERATE_12_5, "12.5 fps" },
 104         { CPIA2_VP_FRAMERATE_15,   "15 fps"   },
 105         { CPIA2_VP_FRAMERATE_25,   "25 fps"   },
 106         { CPIA2_VP_FRAMERATE_30,   "30 fps"   },
 107 };
 108 #define NUM_FRAMERATE_CONTROLS (sizeof(framerate_controls)/sizeof(framerate_controls[0]))
 109
 110 static struct control_menu_info flicker_controls[] =
 111 {
 112         { NEVER_FLICKER, "Off" },
 113         { FLICKER_50,    "50 Hz" },
 114         { FLICKER_60,    "60 Hz"  },
 115 };
 116 #define NUM_FLICKER_CONTROLS (sizeof(flicker_controls)/sizeof(flicker_controls[0]))
 117
 118 static struct control_menu_info lights_controls[] =
 119 {
 120         { 0,   "Off" },
 121         { 64,  "Top" },
 122         { 128, "Bottom"  },
 123         { 192, "Both"  },
 124 };
 125 #define NUM_LIGHTS_CONTROLS (sizeof(lights_controls)/sizeof(lights_controls[0]))
 126 #define GPIO_LIGHTS_MASK 192
 127
 128 static struct v4l2_queryctrl controls[] = {
 129         {
 130                 .id            = V4L2_CID_BRIGHTNESS,
 131                 .type          = V4L2_CTRL_TYPE_INTEGER,
 132                 .name          = "Brightness",
 133                 .minimum       = 0,
 134                 .maximum       = 255,
 135                 .step          = 1,
 136                 .default_value = DEFAULT_BRIGHTNESS,
 137         },
 138         {
 139                 .id            = V4L2_CID_CONTRAST,
 140                 .type          = V4L2_CTRL_TYPE_INTEGER,
 141                 .name          = "Contrast",
 142                 .minimum       = 0,
 143                 .maximum       = 255,
 144                 .step          = 1,
 145                 .default_value = DEFAULT_CONTRAST,
 146         },
 147         {
 148                 .id            = V4L2_CID_SATURATION,
 149                 .type          = V4L2_CTRL_TYPE_INTEGER,
 150                 .name          = "Saturation",
 151                 .minimum       = 0,
 152                 .maximum       = 255,
 153                 .step          = 1,
 154                 .default_value = DEFAULT_SATURATION,
 155         },
 156         {
 157                 .id            = V4L2_CID_HFLIP,
 158                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
 159                 .name          = "Mirror Horizontally",
 160                 .minimum       = 0,
 161                 .maximum       = 1,
 162                 .step          = 1,
 163                 .default_value = 0,
 164         },
 165         {
 166                 .id            = V4L2_CID_VFLIP,
 167                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
 168                 .name          = "Flip Vertically",
 169                 .minimum       = 0,
 170                 .maximum       = 1,
 171                 .step          = 1,
 172                 .default_value = 0,
 173         },
 174         {
 175                 .id            = CPIA2_CID_TARGET_KB,
 176                 .type          = V4L2_CTRL_TYPE_INTEGER,
 177                 .name          = "Target KB",
 178                 .minimum       = 0,
 179                 .maximum       = 255,
 180                 .step          = 1,
 181                 .default_value = DEFAULT_TARGET_KB,
 182         },
 183         {
 184                 .id            = CPIA2_CID_GPIO,
 185                 .type          = V4L2_CTRL_TYPE_INTEGER,
 186                 .name          = "GPIO",
 187                 .minimum       = 0,
 188                 .maximum       = 255,
 189                 .step          = 1,
 190                 .default_value = 0,
 191         },
 192         {
 193                 .id            = CPIA2_CID_FLICKER_MODE,
 194                 .type          = V4L2_CTRL_TYPE_MENU,
 195                 .name          = "Flicker Reduction",
 196                 .minimum       = 0,
 197                 .maximum       = NUM_FLICKER_CONTROLS-1,
 198                 .step          = 1,
 199                 .default_value = 0,
 200         },
 201         {
 202                 .id            = CPIA2_CID_FRAMERATE,
 203                 .type          = V4L2_CTRL_TYPE_MENU,
 204                 .name          = "Framerate",
 205                 .minimum       = 0,
 206                 .maximum       = NUM_FRAMERATE_CONTROLS-1,
 207                 .step          = 1,
 208                 .default_value = NUM_FRAMERATE_CONTROLS-1,
 209         },
 210         {
 211                 .id            = CPIA2_CID_USB_ALT,
 212                 .type          = V4L2_CTRL_TYPE_INTEGER,
 213                 .name          = "USB Alternate",
 214                 .minimum       = USBIF_ISO_1,
 215                 .maximum       = USBIF_ISO_6,
 216                 .step          = 1,
 217                 .default_value = DEFAULT_ALT,
 218         },
 219         {
 220                 .id            = CPIA2_CID_LIGHTS,
 221                 .type          = V4L2_CTRL_TYPE_MENU,
 222                 .name          = "Lights",
 223                 .minimum       = 0,
 224                 .maximum       = NUM_LIGHTS_CONTROLS-1,
 225                 .step          = 1,
 226                 .default_value = 0,
 227         },
 228         {
 229                 .id            = CPIA2_CID_RESET_CAMERA,
 230                 .type          = V4L2_CTRL_TYPE_BUTTON,
 231                 .name          = "Reset Camera",
 232                 .minimum       = 0,
 233                 .maximum       = 0,
 234                 .step          = 0,
 235                 .default_value = 0,
 236         },
 237 };
 238 #define NUM_CONTROLS (sizeof(controls)/sizeof(controls[0]))
 239
 240
 241 /******************************************************************************
 242  *
 243  *  cpia2_open
 244  *
 245  *****************************************************************************/
 246 static int cpia2_open(struct inode *inode, struct file *file)
 247 {
 248         struct video_device *dev = video_devdata(file);
 249         struct camera_data *cam = video_get_drvdata(dev);
 250         int retval = 0;
 251
 252         if (!cam) {
 253                 ERR("Internal error, camera_data not found!\n");
 254                 return -ENODEV;
 255         }
 256
 257         if(mutex_lock_interruptible(&cam->busy_lock))
 258                 return -ERESTARTSYS;
 259
 260         if(!cam->present) {
 261                 retval = -ENODEV;
 262                 goto err_return;
 263         }
 264
 265         if (cam->open_count > 0) {
 266                 goto skip_init;
 267         }
 268
 269         if (cpia2_allocate_buffers(cam)) {
 270                 retval = -ENOMEM;
 271                 goto err_return;
 272         }
 273
 274         /* reset the camera */
 275         if (cpia2_reset_camera(cam) < 0) {
 276                 retval = -EIO;
 277                 goto err_return;
 278         }
 279
 280         cam->APP_len = 0;
 281         cam->COM_len = 0;
 282
 283 skip_init:
 284         {
 285                 struct cpia2_fh *fh = kmalloc(sizeof(*fh),GFP_KERNEL);
 286                 if(!fh) {
 287                         retval = -ENOMEM;
 288                         goto err_return;
 289                 }
 290                 file->private_data = fh;
 291                 fh->prio = V4L2_PRIORITY_UNSET;
 292                 v4l2_prio_open(&cam->prio, &fh->prio);
 293                 fh->mmapped = 0;
 294         }
 295
 296         ++cam->open_count;
 297
 298         cpia2_dbg_dump_registers(cam);
 299
 300 err_return:
 301         mutex_unlock(&cam->busy_lock);
 302         return retval;
 303 }
 304
 305 /******************************************************************************
 306  *
 307  *  cpia2_close
 308  *
 309  *****************************************************************************/
 310 static int cpia2_close(struct inode *inode, struct file *file)
 311 {
 312         struct video_device *dev = video_devdata(file);
 313         struct camera_data *cam = video_get_drvdata(dev);
 314         struct cpia2_fh *fh = file->private_data;
 315
 316         mutex_lock(&cam->busy_lock);
 317
 318         if (cam->present &&
 319             (cam->open_count == 1
 320              || fh->prio == V4L2_PRIORITY_RECORD
 321             )) {
 322                 cpia2_usb_stream_stop(cam);
 323
 324                 if(cam->open_count == 1) {
 325                         /* save camera state for later open */
 326                         cpia2_save_camera_state(cam);
 327
 328                         cpia2_set_low_power(cam);
 329                         cpia2_free_buffers(cam);
 330                 }
 331         }
 332
 333         {
 334                 if(fh->mmapped)
 335                         cam->mmapped = 0;
 336                 v4l2_prio_close(&cam->prio,&fh->prio);
 337                 file->private_data = NULL;
 338                 kfree(fh);
 339         }
 340
 341         if (--cam->open_count == 0) {
 342                 cpia2_free_buffers(cam);
 343                 if (!cam->present) {
 344                         video_unregister_device(dev);
 345                         mutex_unlock(&cam->busy_lock);
 346                         kfree(cam);
 347                         return 0;
 348                 }
 349         }
 350
 351         mutex_unlock(&cam->busy_lock);
 352
 353         return 0;
 354 }
 355
 356 /******************************************************************************
 357  *
 358  *  cpia2_v4l_read
 359  *
 360  *****************************************************************************/
 361 static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count,
 362                               loff_t *off)
 363 {
 364         struct video_device *dev = video_devdata(file);
 365         struct camera_data *cam = video_get_drvdata(dev);
 366         int noblock = file->f_flags&O_NONBLOCK;
 367
 368         struct cpia2_fh *fh = file->private_data;
 369
 370         if(!cam)
 371                 return -EINVAL;
 372
 373         /* Priority check */
 374         if(fh->prio != V4L2_PRIORITY_RECORD) {
 375                 return -EBUSY;
 376         }
 377
 378         return cpia2_read(cam, buf, count, noblock);
 379 }
 380
 381
 382 /******************************************************************************
 383  *
 384  *  cpia2_v4l_poll
 385  *
 386  *****************************************************************************/
 387 static unsigned int cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait)
 388 {
 389         struct video_device *dev = video_devdata(filp);
 390         struct camera_data *cam = video_get_drvdata(dev);
 391
 392         struct cpia2_fh *fh = filp->private_data;
 393
 394         if(!cam)
 395                 return POLLERR;
 396
 397         /* Priority check */
 398         if(fh->prio != V4L2_PRIORITY_RECORD) {
 399                 return POLLERR;
 400         }
 401
 402         return cpia2_poll(cam, filp, wait);
 403 }
 404
 405
 406 /******************************************************************************
 407  *
 408  *  ioctl_cap_query
 409  *
 410  *****************************************************************************/
 411 static int ioctl_cap_query(void *arg, struct camera_data *cam)
 412 {
 413         struct video_capability *vc;
 414         int retval = 0;
 415         vc = arg;
 416
 417         if (cam->params.pnp_id.product == 0x151)
 418                 strcpy(vc->name, "QX5 Microscope");
 419         else
 420                 strcpy(vc->name, "CPiA2 Camera");
 421
 422         vc->type = VID_TYPE_CAPTURE | VID_TYPE_MJPEG_ENCODER;
 423         vc->channels = 1;
 424         vc->audios = 0;
 425         vc->minwidth = 176;     /* VIDEOSIZE_QCIF */
 426         vc->minheight = 144;
 427         switch (cam->params.version.sensor_flags) {
 428         case CPIA2_VP_SENSOR_FLAGS_500:
 429                 vc->maxwidth = STV_IMAGE_VGA_COLS;
 430                 vc->maxheight = STV_IMAGE_VGA_ROWS;
 431                 break;
 432         case CPIA2_VP_SENSOR_FLAGS_410:
 433                 vc->maxwidth = STV_IMAGE_CIF_COLS;
 434                 vc->maxheight = STV_IMAGE_CIF_ROWS;
 435                 break;
 436         default:
 437                 return -EINVAL;
 438         }
 439
 440         return retval;
 441 }
 442
 443 /******************************************************************************
 444  *
 445  *  ioctl_get_channel
 446  *
 447  *****************************************************************************/
 448 static int ioctl_get_channel(void *arg)
 449 {
 450         int retval = 0;
 451         struct video_channel *v;
 452         v = arg;
 453
 454         if (v->channel != 0)
 455                 return -EINVAL;
 456
 457         v->channel = 0;
 458         strcpy(v->name, "Camera");
 459         v->tuners = 0;
 460         v->flags = 0;
 461         v->type = VIDEO_TYPE_CAMERA;
 462         v->norm = 0;
 463
 464         return retval;
 465 }
 466
 467 /******************************************************************************
 468  *
 469  *  ioctl_set_channel
 470  *
 471  *****************************************************************************/
 472 static int ioctl_set_channel(void *arg)
 473 {
 474         struct video_channel *v;
 475         int retval = 0;
 476         v = arg;
 477
 478         if (retval == 0 && v->channel != 0)
 479                 retval = -EINVAL;
 480
 481         return retval;
 482 }
 483
 484 /******************************************************************************
 485  *
 486  *  ioctl_set_image_prop
 487  *
 488  *****************************************************************************/
 489 static int ioctl_set_image_prop(void *arg, struct camera_data *cam)
 490 {
 491         struct video_picture *vp;
 492         int retval = 0;
 493         vp = arg;
 494
 495         /* brightness, color, contrast need no check 0-65535 */
 496         memcpy(&cam->vp, vp, sizeof(*vp));
 497
 498         /* update cam->params.colorParams */
 499         cam->params.color_params.brightness = vp->brightness / 256;
 500         cam->params.color_params.saturation = vp->colour / 256;
 501         cam->params.color_params.contrast = vp->contrast / 256;
 502
 503         DBG("Requested params: bright 0x%X, sat 0x%X, contrast 0x%X\n",
 504             cam->params.color_params.brightness,
 505             cam->params.color_params.saturation,
 506             cam->params.color_params.contrast);
 507
 508         cpia2_set_color_params(cam);
 509
 510         return retval;
 511 }
 512
 513 static int sync(struct camera_data *cam, int frame_nr)
 514 {
 515         struct framebuf *frame = &cam->buffers[frame_nr];
 516
 517         while (1) {
 518                 if (frame->status == FRAME_READY)
 519                         return 0;
 520
 521                 if (!cam->streaming) {
 522                         frame->status = FRAME_READY;
 523                         frame->length = 0;
 524                         return 0;
 525                 }
 526
 527                 mutex_unlock(&cam->busy_lock);
 528                 wait_event_interruptible(cam->wq_stream,
 529                                          !cam->streaming ||
 530                                          frame->status == FRAME_READY);
 531                 mutex_lock(&cam->busy_lock);
 532                 if (signal_pending(current))
 533                         return -ERESTARTSYS;
 534                 if(!cam->present)
 535                         return -ENOTTY;
 536         }
 537 }
 538
 539 /******************************************************************************
 540  *
 541  *  ioctl_set_window_size
 542  *
 543  *****************************************************************************/
 544 static int ioctl_set_window_size(void *arg, struct camera_data *cam,
 545                                  struct cpia2_fh *fh)
 546 {
 547         /* copy_from_user, check validity, copy to internal structure */
 548         struct video_window *vw;
 549         int frame, err;
 550         vw = arg;
 551
 552         if (vw->clipcount != 0) /* clipping not supported */
 553                 return -EINVAL;
 554
 555         if (vw->clips != NULL)  /* clipping not supported */
 556                 return -EINVAL;
 557
 558         /* Ensure that only this process can change the format. */
 559         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
 560         if(err != 0)
 561                 return err;
 562
 563         cam->pixelformat = V4L2_PIX_FMT_JPEG;
 564
 565         /* Be sure to supply the Huffman tables, this isn't MJPEG */
 566         cam->params.compression.inhibit_htables = 0;
 567
 568         /* we set the video window to something smaller or equal to what
 569          * is requested by the user???
 570          */
 571         DBG("Requested width = %d, height = %d\n", vw->width, vw->height);
 572         if (vw->width != cam->vw.width || vw->height != cam->vw.height) {
 573                 cam->vw.width = vw->width;
 574                 cam->vw.height = vw->height;
 575                 cam->params.roi.width = vw->width;
 576                 cam->params.roi.height = vw->height;
 577                 cpia2_set_format(cam);
 578         }
 579
 580         for (frame = 0; frame < cam->num_frames; ++frame) {
 581                 if (cam->buffers[frame].status == FRAME_READING)
 582                         if ((err = sync(cam, frame)) < 0)
 583                                 return err;
 584
 585                 cam->buffers[frame].status = FRAME_EMPTY;
 586         }
 587
 588         return 0;
 589 }
 590
 591 /******************************************************************************
 592  *
 593  *  ioctl_get_mbuf
 594  *
 595  *****************************************************************************/
 596 static int ioctl_get_mbuf(void *arg, struct camera_data *cam)
 597 {
 598         struct video_mbuf *vm;
 599         int i;
 600         vm = arg;
 601
 602         memset(vm, 0, sizeof(*vm));
 603         vm->size = cam->frame_size*cam->num_frames;
 604         vm->frames = cam->num_frames;
 605         for (i = 0; i < cam->num_frames; i++)
 606                 vm->offsets[i] = cam->frame_size * i;
 607
 608         return 0;
 609 }
 610
 611 /******************************************************************************
 612  *
 613  *  ioctl_mcapture
 614  *
 615  *****************************************************************************/
 616 static int ioctl_mcapture(void *arg, struct camera_data *cam,
 617                           struct cpia2_fh *fh)
 618 {
 619         struct video_mmap *vm;
 620         int video_size, err;
 621         vm = arg;
 622
 623         if (vm->frame < 0 || vm->frame >= cam->num_frames)
 624                 return -EINVAL;
 625
 626         /* set video size */
 627         video_size = cpia2_match_video_size(vm->width, vm->height);
 628         if (cam->video_size < 0) {
 629                 return -EINVAL;
 630         }
 631
 632         /* Ensure that only this process can change the format. */
 633         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
 634         if(err != 0)
 635                 return err;
 636
 637         if (video_size != cam->video_size) {
 638                 cam->video_size = video_size;
 639                 cam->params.roi.width = vm->width;
 640                 cam->params.roi.height = vm->height;
 641                 cpia2_set_format(cam);
 642         }
 643
 644         if (cam->buffers[vm->frame].status == FRAME_READING)
 645                 if ((err=sync(cam, vm->frame)) < 0)
 646                         return err;
 647
 648         cam->buffers[vm->frame].status = FRAME_EMPTY;
 649
 650         return cpia2_usb_stream_start(cam,cam->params.camera_state.stream_mode);
 651 }
 652
 653 /******************************************************************************
 654  *
 655  *  ioctl_sync
 656  *
 657  *****************************************************************************/
 658 static int ioctl_sync(void *arg, struct camera_data *cam)
 659 {
 660         int frame;
 661
 662         frame = *(int*)arg;
 663
 664         if (frame < 0 || frame >= cam->num_frames)
 665                 return -EINVAL;
 666
 667         return sync(cam, frame);
 668 }
 669
 670
 671 /******************************************************************************
 672  *
 673  *  ioctl_set_gpio
 674  *
 675  *****************************************************************************/
 676
 677 static int ioctl_set_gpio(void *arg, struct camera_data *cam)
 678 {
 679         __u32 gpio_val;
 680
 681         gpio_val = *(__u32*) arg;
 682
 683         if (gpio_val &~ 0xFFU)
 684                 return -EINVAL;
 685
 686         return cpia2_set_gpio(cam, (unsigned char)gpio_val);
 687 }
 688
 689 /******************************************************************************
 690  *
 691  *  ioctl_querycap
 692  *
 693  *  V4L2 device capabilities
 694  *
 695  *****************************************************************************/
 696
 697 static int ioctl_querycap(void *arg, struct camera_data *cam)
 698 {
 699         struct v4l2_capability *vc = arg;
 700
 701         memset(vc, 0, sizeof(*vc));
 702         strcpy(vc->driver, "cpia2");
 703
 704         if (cam->params.pnp_id.product == 0x151)
 705                 strcpy(vc->card, "QX5 Microscope");
 706         else
 707                 strcpy(vc->card, "CPiA2 Camera");
 708         switch (cam->params.pnp_id.device_type) {
 709         case DEVICE_STV_672:
 710                 strcat(vc->card, " (672/");
 711                 break;
 712         case DEVICE_STV_676:
 713                 strcat(vc->card, " (676/");
 714                 break;
 715         default:
 716                 strcat(vc->card, " (???/");
 717                 break;
 718         }
 719         switch (cam->params.version.sensor_flags) {
 720         case CPIA2_VP_SENSOR_FLAGS_404:
 721                 strcat(vc->card, "404)");
 722                 break;
 723         case CPIA2_VP_SENSOR_FLAGS_407:
 724                 strcat(vc->card, "407)");
 725                 break;
 726         case CPIA2_VP_SENSOR_FLAGS_409:
 727                 strcat(vc->card, "409)");
 728                 break;
 729         case CPIA2_VP_SENSOR_FLAGS_410:
 730                 strcat(vc->card, "410)");
 731                 break;
 732         case CPIA2_VP_SENSOR_FLAGS_500:
 733                 strcat(vc->card, "500)");
 734                 break;
 735         default:
 736                 strcat(vc->card, "???)");
 737                 break;
 738         }
 739
 740         if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0)
 741                 memset(vc->bus_info,0, sizeof(vc->bus_info));
 742
 743         vc->version = KERNEL_VERSION(CPIA2_MAJ_VER, CPIA2_MIN_VER,
 744                                      CPIA2_PATCH_VER);
 745
 746         vc->capabilities = V4L2_CAP_VIDEO_CAPTURE |
 747                            V4L2_CAP_READWRITE |
 748                            V4L2_CAP_STREAMING;
 749
 750         return 0;
 751 }
 752
 753 /******************************************************************************
 754  *
 755  *  ioctl_input
 756  *
 757  *  V4L2 input get/set/enumerate
 758  *
 759  *****************************************************************************/
 760
 761 static int ioctl_input(unsigned int ioclt_nr,void *arg,struct camera_data *cam)
 762 {
 763         struct v4l2_input *i = arg;
 764
 765         if(ioclt_nr  != VIDIOC_G_INPUT) {
 766                 if (i->index != 0)
 767                        return -EINVAL;
 768         }
 769
 770         memset(i, 0, sizeof(*i));
 771         strcpy(i->name, "Camera");
 772         i->type = V4L2_INPUT_TYPE_CAMERA;
 773
 774         return 0;
 775 }
 776
 777 /******************************************************************************
 778  *
 779  *  ioctl_enum_fmt
 780  *
 781  *  V4L2 format enumerate
 782  *
 783  *****************************************************************************/
 784
 785 static int ioctl_enum_fmt(void *arg,struct camera_data *cam)
 786 {
 787         struct v4l2_fmtdesc *f = arg;
 788         int index = f->index;
 789
 790         if (index < 0 || index > 1)
 791                return -EINVAL;
 792
 793         memset(f, 0, sizeof(*f));
 794         f->index = index;
 795         f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 796         f->flags = V4L2_FMT_FLAG_COMPRESSED;
 797         switch(index) {
 798         case 0:
 799                 strcpy(f->description, "MJPEG");
 800                 f->pixelformat = V4L2_PIX_FMT_MJPEG;
 801                 break;
 802         case 1:
 803                 strcpy(f->description, "JPEG");
 804                 f->pixelformat = V4L2_PIX_FMT_JPEG;
 805                 break;
 806         default:
 807                 return -EINVAL;
 808         }
 809
 810         return 0;
 811 }
 812
 813 /******************************************************************************
 814  *
 815  *  ioctl_try_fmt
 816  *
 817  *  V4L2 format try
 818  *
 819  *****************************************************************************/
 820
 821 static int ioctl_try_fmt(void *arg,struct camera_data *cam)
 822 {
 823         struct v4l2_format *f = arg;
 824
 825         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 826                return -EINVAL;
 827
 828         if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG &&
 829             f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
 830                return -EINVAL;
 831
 832         f->fmt.pix.field = V4L2_FIELD_NONE;
 833         f->fmt.pix.bytesperline = 0;
 834         f->fmt.pix.sizeimage = cam->frame_size;
 835         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 836         f->fmt.pix.priv = 0;
 837
 838         switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
 839         case VIDEOSIZE_VGA:
 840                 f->fmt.pix.width = 640;
 841                 f->fmt.pix.height = 480;
 842                 break;
 843         case VIDEOSIZE_CIF:
 844                 f->fmt.pix.width = 352;
 845                 f->fmt.pix.height = 288;
 846                 break;
 847         case VIDEOSIZE_QVGA:
 848                 f->fmt.pix.width = 320;
 849                 f->fmt.pix.height = 240;
 850                 break;
 851         case VIDEOSIZE_288_216:
 852                 f->fmt.pix.width = 288;
 853                 f->fmt.pix.height = 216;
 854                 break;
 855         case VIDEOSIZE_256_192:
 856                 f->fmt.pix.width = 256;
 857                 f->fmt.pix.height = 192;
 858                 break;
 859         case VIDEOSIZE_224_168:
 860                 f->fmt.pix.width = 224;
 861                 f->fmt.pix.height = 168;
 862                 break;
 863         case VIDEOSIZE_192_144:
 864                 f->fmt.pix.width = 192;
 865                 f->fmt.pix.height = 144;
 866                 break;
 867         case VIDEOSIZE_QCIF:
 868         default:
 869                 f->fmt.pix.width = 176;
 870                 f->fmt.pix.height = 144;
 871                 break;
 872         }
 873
 874         return 0;
 875 }
 876
 877 /******************************************************************************
 878  *
 879  *  ioctl_set_fmt
 880  *
 881  *  V4L2 format set
 882  *
 883  *****************************************************************************/
 884
 885 static int ioctl_set_fmt(void *arg,struct camera_data *cam, struct cpia2_fh *fh)
 886 {
 887         struct v4l2_format *f = arg;
 888         int err, frame;
 889
 890         err = ioctl_try_fmt(arg, cam);
 891         if(err != 0)
 892                 return err;
 893
 894         /* Ensure that only this process can change the format. */
 895         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
 896         if(err != 0) {
 897                 return err;
 898         }
 899
 900         cam->pixelformat = f->fmt.pix.pixelformat;
 901
 902         /* NOTE: This should be set to 1 for MJPEG, but some apps don't handle
 903          * the missing Huffman table properly. */
 904         cam->params.compression.inhibit_htables = 0;
 905                 /*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/
 906
 907         /* we set the video window to something smaller or equal to what
 908          * is requested by the user???
 909          */
 910         DBG("Requested width = %d, height = %d\n",
 911             f->fmt.pix.width, f->fmt.pix.height);
 912         if (f->fmt.pix.width != cam->vw.width ||
 913             f->fmt.pix.height != cam->vw.height) {
 914                 cam->vw.width = f->fmt.pix.width;
 915                 cam->vw.height = f->fmt.pix.height;
 916                 cam->params.roi.width = f->fmt.pix.width;
 917                 cam->params.roi.height = f->fmt.pix.height;
 918                 cpia2_set_format(cam);
 919         }
 920
 921         for (frame = 0; frame < cam->num_frames; ++frame) {
 922                 if (cam->buffers[frame].status == FRAME_READING)
 923                         if ((err = sync(cam, frame)) < 0)
 924                                 return err;
 925
 926                 cam->buffers[frame].status = FRAME_EMPTY;
 927         }
 928
 929         return 0;
 930 }
 931
 932 /******************************************************************************
 933  *
 934  *  ioctl_get_fmt
 935  *
 936  *  V4L2 format get
 937  *
 938  *****************************************************************************/
 939
 940 static int ioctl_get_fmt(void *arg,struct camera_data *cam)
 941 {
 942         struct v4l2_format *f = arg;
 943
 944         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 945                return -EINVAL;
 946
 947         f->fmt.pix.width = cam->vw.width;
 948         f->fmt.pix.height = cam->vw.height;
 949         f->fmt.pix.pixelformat = cam->pixelformat;
 950         f->fmt.pix.field = V4L2_FIELD_NONE;
 951         f->fmt.pix.bytesperline = 0;
 952         f->fmt.pix.sizeimage = cam->frame_size;
 953         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 954         f->fmt.pix.priv = 0;
 955
 956         return 0;
 957 }
 958
 959 /******************************************************************************
 960  *
 961  *  ioctl_cropcap
 962  *
 963  *  V4L2 query cropping capabilities
 964  *  NOTE: cropping is currently disabled
 965  *
 966  *****************************************************************************/
 967
 968 static int ioctl_cropcap(void *arg,struct camera_data *cam)
 969 {
 970         struct v4l2_cropcap *c = arg;
 971
 972         if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 973                return -EINVAL;
 974
 975         c->bounds.left = 0;
 976         c->bounds.top = 0;
 977         c->bounds.width = cam->vw.width;
 978         c->bounds.height = cam->vw.height;
 979         c->defrect.left = 0;
 980         c->defrect.top = 0;
 981         c->defrect.width = cam->vw.width;
 982         c->defrect.height = cam->vw.height;
 983         c->pixelaspect.numerator = 1;
 984         c->pixelaspect.denominator = 1;
 985
 986         return 0;
 987 }
 988
 989 /******************************************************************************
 990  *
 991  *  ioctl_queryctrl
 992  *
 993  *  V4L2 query possible control variables
 994  *
 995  *****************************************************************************/
 996
 997 static int ioctl_queryctrl(void *arg,struct camera_data *cam)
 998 {
 999         struct v4l2_queryctrl *c = arg;
1000         int i;
1001
1002         for(i=0; i<NUM_CONTROLS; ++i) {
1003                 if(c->id == controls[i].id) {
1004                         memcpy(c, controls+i, sizeof(*c));
1005                         break;
1006                 }
1007         }
1008
1009         if(i == NUM_CONTROLS)
1010                 return -EINVAL;
1011
1012         /* Some devices have additional limitations */
1013         switch(c->id) {
1014         case V4L2_CID_BRIGHTNESS:
1015                 /***
1016                  * Don't let the register be set to zero - bug in VP4
1017                  * flash of full brightness
1018                  ***/
1019                 if (cam->params.pnp_id.device_type == DEVICE_STV_672)
1020                         c->minimum = 1;
1021                 break;
1022         case V4L2_CID_VFLIP:
1023                 // VP5 Only
1024                 if(cam->params.pnp_id.device_type == DEVICE_STV_672)
1025                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
1026                 break;
1027         case CPIA2_CID_FRAMERATE:
1028                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
1029                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
1030                         // Maximum 15fps
1031                         int i;
1032                         for(i=0; i<c->maximum; ++i) {
1033                                 if(framerate_controls[i].value ==
1034                                    CPIA2_VP_FRAMERATE_15) {
1035                                         c->maximum = i;
1036                                         c->default_value = i;
1037                                 }
1038                         }
1039                 }
1040                 break;
1041         case CPIA2_CID_FLICKER_MODE:
1042                 // Flicker control only valid for 672.
1043                 if(cam->params.pnp_id.device_type != DEVICE_STV_672)
1044                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
1045                 break;
1046         case CPIA2_CID_LIGHTS:
1047                 // Light control only valid for the QX5 Microscope.
1048                 if(cam->params.pnp_id.product != 0x151)
1049                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
1050                 break;
1051         default:
1052                 break;
1053         }
1054
1055         return 0;
1056 }
1057
1058 /******************************************************************************
1059  *
1060  *  ioctl_querymenu
1061  *
1062  *  V4L2 query possible control variables
1063  *
1064  *****************************************************************************/
1065
1066 static int ioctl_querymenu(void *arg,struct camera_data *cam)
1067 {
1068         struct v4l2_querymenu *m = arg;
1069
1070         memset(m->name, 0, sizeof(m->name));
1071         m->reserved = 0;
1072
1073         switch(m->id) {
1074         case CPIA2_CID_FLICKER_MODE:
1075                 if(m->index < 0 || m->index >= NUM_FLICKER_CONTROLS)
1076                         return -EINVAL;
1077
1078                 strcpy(m->name, flicker_controls[m->index].name);
1079                 break;
1080         case CPIA2_CID_FRAMERATE:
1081             {
1082                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
1083                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
1084                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
1085                         // Maximum 15fps
1086                         int i;
1087                         for(i=0; i<maximum; ++i) {
1088                                 if(framerate_controls[i].value ==
1089                                    CPIA2_VP_FRAMERATE_15)
1090                                         maximum = i;
1091                         }
1092                 }
1093                 if(m->index < 0 || m->index > maximum)
1094                         return -EINVAL;
1095
1096                 strcpy(m->name, framerate_controls[m->index].name);
1097                 break;
1098             }
1099         case CPIA2_CID_LIGHTS:
1100                 if(m->index < 0 || m->index >= NUM_LIGHTS_CONTROLS)
1101                         return -EINVAL;
1102
1103                 strcpy(m->name, lights_controls[m->index].name);
1104                 break;
1105         default:
1106                 return -EINVAL;
1107         }
1108
1109         return 0;
1110 }
1111
1112 /******************************************************************************
1113  *
1114  *  ioctl_g_ctrl
1115  *
1116  *  V4L2 get the value of a control variable
1117  *
1118  *****************************************************************************/
1119
1120 static int ioctl_g_ctrl(void *arg,struct camera_data *cam)
1121 {
1122         struct v4l2_control *c = arg;
1123
1124         switch(c->id) {
1125         case V4L2_CID_BRIGHTNESS:
1126                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_BRIGHTNESS,
1127                                  TRANSFER_READ, 0);
1128                 c->value = cam->params.color_params.brightness;
1129                 break;
1130         case V4L2_CID_CONTRAST:
1131                 cpia2_do_command(cam, CPIA2_CMD_GET_CONTRAST,
1132                                  TRANSFER_READ, 0);
1133                 c->value = cam->params.color_params.contrast;
1134                 break;
1135         case V4L2_CID_SATURATION:
1136                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_SATURATION,
1137                                  TRANSFER_READ, 0);
1138                 c->value = cam->params.color_params.saturation;
1139                 break;
1140         case V4L2_CID_HFLIP:
1141                 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
1142                                  TRANSFER_READ, 0);
1143                 c->value = (cam->params.vp_params.user_effects &
1144                             CPIA2_VP_USER_EFFECTS_MIRROR) != 0;
1145                 break;
1146         case V4L2_CID_VFLIP:
1147                 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
1148                                  TRANSFER_READ, 0);
1149                 c->value = (cam->params.vp_params.user_effects &
1150                             CPIA2_VP_USER_EFFECTS_FLIP) != 0;
1151                 break;
1152         case CPIA2_CID_TARGET_KB:
1153                 c->value = cam->params.vc_params.target_kb;
1154                 break;
1155         case CPIA2_CID_GPIO:
1156                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
1157                                  TRANSFER_READ, 0);
1158                 c->value = cam->params.vp_params.gpio_data;
1159                 break;
1160         case CPIA2_CID_FLICKER_MODE:
1161         {
1162                 int i, mode;
1163                 cpia2_do_command(cam, CPIA2_CMD_GET_FLICKER_MODES,
1164                                  TRANSFER_READ, 0);
1165                 if(cam->params.flicker_control.cam_register &
1166                    CPIA2_VP_FLICKER_MODES_NEVER_FLICKER) {
1167                         mode = NEVER_FLICKER;
1168                 } else {
1169                     if(cam->params.flicker_control.cam_register &
1170                        CPIA2_VP_FLICKER_MODES_50HZ) {
1171                         mode = FLICKER_50;
1172                     } else {
1173                         mode = FLICKER_60;
1174                     }
1175                 }
1176                 for(i=0; i<NUM_FLICKER_CONTROLS; i++) {
1177                         if(flicker_controls[i].value == mode) {
1178                                 c->value = i;
1179                                 break;
1180                         }
1181                 }
1182                 if(i == NUM_FLICKER_CONTROLS)
1183                         return -EINVAL;
1184                 break;
1185         }
1186         case CPIA2_CID_FRAMERATE:
1187         {
1188                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
1189                 int i;
1190                 for(i=0; i<= maximum; i++) {
1191                         if(cam->params.vp_params.frame_rate ==
1192                            framerate_controls[i].value)
1193                                 break;
1194                 }
1195                 if(i > maximum)
1196                         return -EINVAL;
1197                 c->value = i;
1198                 break;
1199         }
1200         case CPIA2_CID_USB_ALT:
1201                 c->value = cam->params.camera_state.stream_mode;
1202                 break;
1203         case CPIA2_CID_LIGHTS:
1204         {
1205                 int i;
1206                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
1207                                  TRANSFER_READ, 0);
1208                 for(i=0; i<NUM_LIGHTS_CONTROLS; i++) {
1209                         if((cam->params.vp_params.gpio_data&GPIO_LIGHTS_MASK) ==
1210                            lights_controls[i].value) {
1211                                 break;
1212                         }
1213                 }
1214                 if(i == NUM_LIGHTS_CONTROLS)
1215                         return -EINVAL;
1216                 c->value = i;
1217                 break;
1218         }
1219         case CPIA2_CID_RESET_CAMERA:
1220                 return -EINVAL;
1221         default:
1222                 return -EINVAL;
1223         }
1224
1225         DBG("Get control id:%d, value:%d\n", c->id, c->value);
1226
1227         return 0;
1228 }
1229
1230 /******************************************************************************
1231  *
1232  *  ioctl_s_ctrl
1233  *
1234  *  V4L2 set the value of a control variable
1235  *
1236  *****************************************************************************/
1237
1238 static int ioctl_s_ctrl(void *arg,struct camera_data *cam)
1239 {
1240         struct v4l2_control *c = arg;
1241         int i;
1242         int retval = 0;
1243
1244         DBG("Set control id:%d, value:%d\n", c->id, c->value);
1245
1246         /* Check that the value is in range */
1247         for(i=0; i<NUM_CONTROLS; i++) {
1248                 if(c->id == controls[i].id) {
1249                         if(c->value < controls[i].minimum ||
1250                            c->value > controls[i].maximum) {
1251                                 return -EINVAL;
1252                         }
1253                         break;
1254                 }
1255         }
1256         if(i == NUM_CONTROLS)
1257                 return -EINVAL;
1258
1259         switch(c->id) {
1260         case V4L2_CID_BRIGHTNESS:
1261                 cpia2_set_brightness(cam, c->value);
1262                 break;
1263         case V4L2_CID_CONTRAST:
1264                 cpia2_set_contrast(cam, c->value);
1265                 break;
1266         case V4L2_CID_SATURATION:
1267                 cpia2_set_saturation(cam, c->value);
1268                 break;
1269         case V4L2_CID_HFLIP:
1270                 cpia2_set_property_mirror(cam, c->value);
1271                 break;
1272         case V4L2_CID_VFLIP:
1273                 cpia2_set_property_flip(cam, c->value);
1274                 break;
1275         case CPIA2_CID_TARGET_KB:
1276                 retval = cpia2_set_target_kb(cam, c->value);
1277                 break;
1278         case CPIA2_CID_GPIO:
1279                 retval = cpia2_set_gpio(cam, c->value);
1280                 break;
1281         case CPIA2_CID_FLICKER_MODE:
1282                 retval = cpia2_set_flicker_mode(cam,
1283                                               flicker_controls[c->value].value);
1284                 break;
1285         case CPIA2_CID_FRAMERATE:
1286                 retval = cpia2_set_fps(cam, framerate_controls[c->value].value);
1287                 break;
1288         case CPIA2_CID_USB_ALT:
1289                 retval = cpia2_usb_change_streaming_alternate(cam, c->value);
1290                 break;
1291         case CPIA2_CID_LIGHTS:
1292                 retval = cpia2_set_gpio(cam, lights_controls[c->value].value);
1293                 break;
1294         case CPIA2_CID_RESET_CAMERA:
1295                 cpia2_usb_stream_pause(cam);
1296                 cpia2_reset_camera(cam);
1297                 cpia2_usb_stream_resume(cam);
1298                 break;
1299         default:
1300                 retval = -EINVAL;
1301         }
1302
1303         return retval;
1304 }
1305
1306 /******************************************************************************
1307  *
1308  *  ioctl_g_jpegcomp
1309  *
1310  *  V4L2 get the JPEG compression parameters
1311  *
1312  *****************************************************************************/
1313
1314 static int ioctl_g_jpegcomp(void *arg,struct camera_data *cam)
1315 {
1316         struct v4l2_jpegcompression *parms = arg;
1317
1318         memset(parms, 0, sizeof(*parms));
1319
1320         parms->quality = 80; // TODO: Can this be made meaningful?
1321
1322         parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI;
1323         if(!cam->params.compression.inhibit_htables) {
1324                 parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT;
1325         }
1326
1327         parms->APPn = cam->APPn;
1328         parms->APP_len = cam->APP_len;
1329         if(cam->APP_len > 0) {
1330                 memcpy(parms->APP_data, cam->APP_data, cam->APP_len);
1331                 parms->jpeg_markers |= V4L2_JPEG_MARKER_APP;
1332         }
1333
1334         parms->COM_len = cam->COM_len;
1335         if(cam->COM_len > 0) {
1336                 memcpy(parms->COM_data, cam->COM_data, cam->COM_len);
1337                 parms->jpeg_markers |= JPEG_MARKER_COM;
1338         }
1339
1340         DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n",
1341             parms->APP_len, parms->COM_len);
1342
1343         return 0;
1344 }
1345
1346 /******************************************************************************
1347  *
1348  *  ioctl_s_jpegcomp
1349  *
1350  *  V4L2 set the JPEG compression parameters
1351  *  NOTE: quality and some jpeg_markers are ignored.
1352  *
1353  *****************************************************************************/
1354
1355 static int ioctl_s_jpegcomp(void *arg,struct camera_data *cam)
1356 {
1357         struct v4l2_jpegcompression *parms = arg;
1358
1359         DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n",
1360             parms->APP_len, parms->COM_len);
1361
1362         cam->params.compression.inhibit_htables =
1363                 !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
1364
1365         if(parms->APP_len != 0) {
1366                 if(parms->APP_len > 0 &&
1367                    parms->APP_len <= sizeof(cam->APP_data) &&
1368                    parms->APPn >= 0 && parms->APPn <= 15) {
1369                         cam->APPn = parms->APPn;
1370                         cam->APP_len = parms->APP_len;
1371                         memcpy(cam->APP_data, parms->APP_data, parms->APP_len);
1372                 } else {
1373                         LOG("Bad APPn Params n=%d len=%d\n",
1374                             parms->APPn, parms->APP_len);
1375                         return -EINVAL;
1376                 }
1377         } else {
1378                 cam->APP_len = 0;
1379         }
1380
1381         if(parms->COM_len != 0) {
1382                 if(parms->COM_len > 0 &&
1383                    parms->COM_len <= sizeof(cam->COM_data)) {
1384                         cam->COM_len = parms->COM_len;
1385                         memcpy(cam->COM_data, parms->COM_data, parms->COM_len);
1386                 } else {
1387                         LOG("Bad COM_len=%d\n", parms->COM_len);
1388                         return -EINVAL;
1389                 }
1390         }
1391
1392         return 0;
1393 }
1394
1395 /******************************************************************************
1396  *
1397  *  ioctl_reqbufs
1398  *
1399  *  V4L2 Initiate memory mapping.
1400  *  NOTE: The user's request is ignored. For now the buffers are fixed.
1401  *
1402  *****************************************************************************/
1403
1404 static int ioctl_reqbufs(void *arg,struct camera_data *cam)
1405 {
1406         struct v4l2_requestbuffers *req = arg;
1407
1408         if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1409            req->memory != V4L2_MEMORY_MMAP)
1410                 return -EINVAL;
1411
1412         DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames);
1413         req->count = cam->num_frames;
1414         memset(&req->reserved, 0, sizeof(req->reserved));
1415
1416         return 0;
1417 }
1418
1419 /******************************************************************************
1420  *
1421  *  ioctl_querybuf
1422  *
1423  *  V4L2 Query memory buffer status.
1424  *
1425  *****************************************************************************/
1426
1427 static int ioctl_querybuf(void *arg,struct camera_data *cam)
1428 {
1429         struct v4l2_buffer *buf = arg;
1430
1431         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1432            buf->index > cam->num_frames)
1433                 return -EINVAL;
1434
1435         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1436         buf->length = cam->frame_size;
1437
1438         buf->memory = V4L2_MEMORY_MMAP;
1439
1440         if(cam->mmapped)
1441                 buf->flags = V4L2_BUF_FLAG_MAPPED;
1442         else
1443                 buf->flags = 0;
1444
1445         switch (cam->buffers[buf->index].status) {
1446         case FRAME_EMPTY:
1447         case FRAME_ERROR:
1448         case FRAME_READING:
1449                 buf->bytesused = 0;
1450                 buf->flags = V4L2_BUF_FLAG_QUEUED;
1451                 break;
1452         case FRAME_READY:
1453                 buf->bytesused = cam->buffers[buf->index].length;
1454                 buf->timestamp = cam->buffers[buf->index].timestamp;
1455                 buf->sequence = cam->buffers[buf->index].seq;
1456                 buf->flags = V4L2_BUF_FLAG_DONE;
1457                 break;
1458         }
1459
1460         DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n",
1461              buf->index, buf->m.offset, buf->flags, buf->sequence,
1462              buf->bytesused);
1463
1464         return 0;
1465 }
1466
1467 /******************************************************************************
1468  *
1469  *  ioctl_qbuf
1470  *
1471  *  V4L2 User is freeing buffer
1472  *
1473  *****************************************************************************/
1474
1475 static int ioctl_qbuf(void *arg,struct camera_data *cam)
1476 {
1477         struct v4l2_buffer *buf = arg;
1478
1479         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1480            buf->memory != V4L2_MEMORY_MMAP ||
1481            buf->index > cam->num_frames)
1482                 return -EINVAL;
1483
1484         DBG("QBUF #%d\n", buf->index);
1485
1486         if(cam->buffers[buf->index].status == FRAME_READY)
1487                 cam->buffers[buf->index].status = FRAME_EMPTY;
1488
1489         return 0;
1490 }
1491
1492 /******************************************************************************
1493  *
1494  *  find_earliest_filled_buffer
1495  *
1496  *  Helper for ioctl_dqbuf. Find the next ready buffer.
1497  *
1498  *****************************************************************************/
1499
1500 static int find_earliest_filled_buffer(struct camera_data *cam)
1501 {
1502         int i;
1503         int found = -1;
1504         for (i=0; i<cam->num_frames; i++) {
1505                 if(cam->buffers[i].status == FRAME_READY) {
1506                         if(found < 0) {
1507                                 found = i;
1508                         } else {
1509                                 /* find which buffer is earlier */
1510                                 struct timeval *tv1, *tv2;
1511                                 tv1 = &cam->buffers[i].timestamp;
1512                                 tv2 = &cam->buffers[found].timestamp;
1513                                 if(tv1->tv_sec < tv2->tv_sec ||
1514                                    (tv1->tv_sec == tv2->tv_sec &&
1515                                     tv1->tv_usec < tv2->tv_usec))
1516                                         found = i;
1517                         }
1518                 }
1519         }
1520         return found;
1521 }
1522
1523 /******************************************************************************
1524  *
1525  *  ioctl_dqbuf
1526  *
1527  *  V4L2 User is asking for a filled buffer.
1528  *
1529  *****************************************************************************/
1530
1531 static int ioctl_dqbuf(void *arg,struct camera_data *cam, struct file *file)
1532 {
1533         struct v4l2_buffer *buf = arg;
1534         int frame;
1535
1536         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1537            buf->memory != V4L2_MEMORY_MMAP)
1538                 return -EINVAL;
1539
1540         frame = find_earliest_filled_buffer(cam);
1541
1542         if(frame < 0 && file->f_flags&O_NONBLOCK)
1543                 return -EAGAIN;
1544
1545         if(frame < 0) {
1546                 /* Wait for a frame to become available */
1547                 struct framebuf *cb=cam->curbuff;
1548                 mutex_unlock(&cam->busy_lock);
1549                 wait_event_interruptible(cam->wq_stream,
1550                                          !cam->present ||
1551                                          (cb=cam->curbuff)->status == FRAME_READY);
1552                 mutex_lock(&cam->busy_lock);
1553                 if (signal_pending(current))
1554                         return -ERESTARTSYS;
1555                 if(!cam->present)
1556                         return -ENOTTY;
1557                 frame = cb->num;
1558         }
1559
1560
1561         buf->index = frame;
1562         buf->bytesused = cam->buffers[buf->index].length;
1563         buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE;
1564         buf->field = V4L2_FIELD_NONE;
1565         buf->timestamp = cam->buffers[buf->index].timestamp;
1566         buf->sequence = cam->buffers[buf->index].seq;
1567         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1568         buf->length = cam->frame_size;
1569         buf->input = 0;
1570         buf->reserved = 0;
1571         memset(&buf->timecode, 0, sizeof(buf->timecode));
1572
1573         DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index,
1574             cam->buffers[buf->index].status, buf->sequence, buf->bytesused);
1575
1576         return 0;
1577 }
1578
1579 /******************************************************************************
1580  *
1581  *  cpia2_ioctl
1582  *
1583  *****************************************************************************/
1584 static int cpia2_do_ioctl(struct inode *inode, struct file *file,
1585                           unsigned int ioctl_nr, void *arg)
1586 {
1587         struct video_device *dev = video_devdata(file);
1588         struct camera_data *cam = video_get_drvdata(dev);
1589         int retval = 0;
1590
1591         if (!cam)
1592                 return -ENOTTY;
1593
1594         /* make this _really_ smp-safe */
1595         if (mutex_lock_interruptible(&cam->busy_lock))
1596                 return -ERESTARTSYS;
1597
1598         if (!cam->present) {
1599                 mutex_unlock(&cam->busy_lock);
1600                 return -ENODEV;
1601         }
1602
1603         /* Priority check */
1604         switch (ioctl_nr) {
1605         case VIDIOCSWIN:
1606         case VIDIOCMCAPTURE:
1607         case VIDIOC_S_FMT:
1608         {
1609                 struct cpia2_fh *fh = file->private_data;
1610                 retval = v4l2_prio_check(&cam->prio, &fh->prio);
1611                 if(retval) {
1612                         mutex_unlock(&cam->busy_lock);
1613                         return retval;
1614                 }
1615                 break;
1616         }
1617         case VIDIOCGMBUF:
1618         case VIDIOCSYNC:
1619         {
1620                 struct cpia2_fh *fh = file->private_data;
1621                 if(fh->prio != V4L2_PRIORITY_RECORD) {
1622                         mutex_unlock(&cam->busy_lock);
1623                         return -EBUSY;
1624                 }
1625                 break;
1626         }
1627         default:
1628                 break;
1629         }
1630
1631         switch (ioctl_nr) {
1632         case VIDIOCGCAP:        /* query capabilities */
1633                 retval = ioctl_cap_query(arg, cam);
1634                 break;
1635
1636         case VIDIOCGCHAN:       /* get video source - we are a camera, nothing else */
1637                 retval = ioctl_get_channel(arg);
1638                 break;
1639         case VIDIOCSCHAN:       /* set video source - we are a camera, nothing else */
1640                 retval = ioctl_set_channel(arg);
1641                 break;
1642         case VIDIOCGPICT:       /* image properties */
1643                 memcpy(arg, &cam->vp, sizeof(struct video_picture));
1644                 break;
1645         case VIDIOCSPICT:
1646                 retval = ioctl_set_image_prop(arg, cam);
1647                 break;
1648         case VIDIOCGWIN:        /* get/set capture window */
1649                 memcpy(arg, &cam->vw, sizeof(struct video_window));
1650                 break;
1651         case VIDIOCSWIN:
1652                 retval = ioctl_set_window_size(arg, cam, file->private_data);
1653                 break;
1654         case VIDIOCGMBUF:       /* mmap interface */
1655                 retval = ioctl_get_mbuf(arg, cam);
1656                 break;
1657         case VIDIOCMCAPTURE:
1658                 retval = ioctl_mcapture(arg, cam, file->private_data);
1659                 break;
1660         case VIDIOCSYNC:
1661                 retval = ioctl_sync(arg, cam);
1662                 break;
1663                 /* pointless to implement overlay with this camera */
1664         case VIDIOCCAPTURE:
1665         case VIDIOCGFBUF:
1666         case VIDIOCSFBUF:
1667         case VIDIOCKEY:
1668                 retval = -EINVAL;
1669                 break;
1670
1671                 /* tuner interface - we have none */
1672         case VIDIOCGTUNER:
1673         case VIDIOCSTUNER:
1674         case VIDIOCGFREQ:
1675         case VIDIOCSFREQ:
1676                 retval = -EINVAL;
1677                 break;
1678
1679                 /* audio interface - we have none */
1680         case VIDIOCGAUDIO:
1681         case VIDIOCSAUDIO:
1682                 retval = -EINVAL;
1683                 break;
1684
1685         /* CPIA2 extension to Video4Linux API */
1686         case CPIA2_IOC_SET_GPIO:
1687                 retval = ioctl_set_gpio(arg, cam);
1688                 break;
1689         case VIDIOC_QUERYCAP:
1690                 retval = ioctl_querycap(arg,cam);
1691                 break;
1692
1693         case VIDIOC_ENUMINPUT:
1694         case VIDIOC_G_INPUT:
1695         case VIDIOC_S_INPUT:
1696                 retval = ioctl_input(ioctl_nr, arg,cam);
1697                 break;
1698
1699         case VIDIOC_ENUM_FMT:
1700                 retval = ioctl_enum_fmt(arg,cam);
1701                 break;
1702         case VIDIOC_TRY_FMT:
1703                 retval = ioctl_try_fmt(arg,cam);
1704                 break;
1705         case VIDIOC_G_FMT:
1706                 retval = ioctl_get_fmt(arg,cam);
1707                 break;
1708         case VIDIOC_S_FMT:
1709                 retval = ioctl_set_fmt(arg,cam,file->private_data);
1710                 break;
1711
1712         case VIDIOC_CROPCAP:
1713                 retval = ioctl_cropcap(arg,cam);
1714                 break;
1715         case VIDIOC_G_CROP:
1716         case VIDIOC_S_CROP:
1717                 // TODO: I think cropping can be implemented - SJB
1718                 retval = -EINVAL;
1719                 break;
1720
1721         case VIDIOC_QUERYCTRL:
1722                 retval = ioctl_queryctrl(arg,cam);
1723                 break;
1724         case VIDIOC_QUERYMENU:
1725                 retval = ioctl_querymenu(arg,cam);
1726                 break;
1727         case VIDIOC_G_CTRL:
1728                 retval = ioctl_g_ctrl(arg,cam);
1729                 break;
1730         case VIDIOC_S_CTRL:
1731                 retval = ioctl_s_ctrl(arg,cam);
1732                 break;
1733
1734         case VIDIOC_G_JPEGCOMP:
1735                 retval = ioctl_g_jpegcomp(arg,cam);
1736                 break;
1737         case VIDIOC_S_JPEGCOMP:
1738                 retval = ioctl_s_jpegcomp(arg,cam);
1739                 break;
1740
1741         case VIDIOC_G_PRIORITY:
1742         {
1743                 struct cpia2_fh *fh = file->private_data;
1744                 *(enum v4l2_priority*)arg = fh->prio;
1745                 break;
1746         }
1747         case VIDIOC_S_PRIORITY:
1748         {
1749                 struct cpia2_fh *fh = file->private_data;
1750                 enum v4l2_priority prio;
1751                 prio = *(enum v4l2_priority*)arg;
1752                 if(cam->streaming &&
1753                    prio != fh->prio &&
1754                    fh->prio == V4L2_PRIORITY_RECORD) {
1755                         /* Can't drop record priority while streaming */
1756                         retval = -EBUSY;
1757                 } else if(prio == V4L2_PRIORITY_RECORD &&
1758                    prio != fh->prio &&
1759                    v4l2_prio_max(&cam->prio) == V4L2_PRIORITY_RECORD) {
1760                         /* Only one program can record at a time */
1761                         retval = -EBUSY;
1762                 } else {
1763                         retval = v4l2_prio_change(&cam->prio, &fh->prio, prio);
1764                 }
1765                 break;
1766         }
1767
1768         case VIDIOC_REQBUFS:
1769                 retval = ioctl_reqbufs(arg,cam);
1770                 break;
1771         case VIDIOC_QUERYBUF:
1772                 retval = ioctl_querybuf(arg,cam);
1773                 break;
1774         case VIDIOC_QBUF:
1775                 retval = ioctl_qbuf(arg,cam);
1776                 break;
1777         case VIDIOC_DQBUF:
1778                 retval = ioctl_dqbuf(arg,cam,file);
1779                 break;
1780         case VIDIOC_STREAMON:
1781         {
1782                 int type;
1783                 DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming);
1784                 type = *(int*)arg;
1785                 if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1786                         retval = -EINVAL;
1787
1788                 if(!cam->streaming) {
1789                         retval = cpia2_usb_stream_start(cam,
1790                                           cam->params.camera_state.stream_mode);
1791                 } else {
1792                         retval = -EINVAL;
1793                 }
1794
1795                 break;
1796         }
1797         case VIDIOC_STREAMOFF:
1798         {
1799                 int type;
1800                 DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming);
1801                 type = *(int*)arg;
1802                 if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1803                         retval = -EINVAL;
1804
1805                 if(cam->streaming) {
1806                         retval = cpia2_usb_stream_stop(cam);
1807                 } else {
1808                         retval = -EINVAL;
1809                 }
1810
1811                 break;
1812         }
1813
1814         case VIDIOC_ENUMOUTPUT:
1815         case VIDIOC_G_OUTPUT:
1816         case VIDIOC_S_OUTPUT:
1817         case VIDIOC_G_MODULATOR:
1818         case VIDIOC_S_MODULATOR:
1819
1820         case VIDIOC_ENUMAUDIO:
1821         case VIDIOC_G_AUDIO:
1822         case VIDIOC_S_AUDIO:
1823
1824         case VIDIOC_ENUMAUDOUT:
1825         case VIDIOC_G_AUDOUT:
1826         case VIDIOC_S_AUDOUT:
1827
1828         case VIDIOC_ENUMSTD:
1829         case VIDIOC_QUERYSTD:
1830         case VIDIOC_G_STD:
1831         case VIDIOC_S_STD:
1832
1833         case VIDIOC_G_TUNER:
1834         case VIDIOC_S_TUNER:
1835         case VIDIOC_G_FREQUENCY:
1836         case VIDIOC_S_FREQUENCY:
1837
1838         case VIDIOC_OVERLAY:
1839         case VIDIOC_G_FBUF:
1840         case VIDIOC_S_FBUF:
1841
1842         case VIDIOC_G_PARM:
1843         case VIDIOC_S_PARM:
1844                 retval = -EINVAL;
1845                 break;
1846         default:
1847                 retval = -ENOIOCTLCMD;
1848                 break;
1849         }
1850
1851         mutex_unlock(&cam->busy_lock);
1852         return retval;
1853 }
1854
1855 static int cpia2_ioctl(struct inode *inode, struct file *file,
1856                        unsigned int ioctl_nr, unsigned long iarg)
1857 {
1858         return video_usercopy(inode, file, ioctl_nr, iarg, cpia2_do_ioctl);
1859 }
1860
1861 /******************************************************************************
1862  *
1863  *  cpia2_mmap
1864  *
1865  *****************************************************************************/
1866 static int cpia2_mmap(struct file *file, struct vm_area_struct *area)
1867 {
1868         int retval;
1869         struct video_device *dev = video_devdata(file);
1870         struct camera_data *cam = video_get_drvdata(dev);
1871
1872         /* Priority check */
1873         struct cpia2_fh *fh = file->private_data;
1874         if(fh->prio != V4L2_PRIORITY_RECORD) {
1875                 return -EBUSY;
1876         }
1877
1878         retval = cpia2_remap_buffer(cam, area);
1879
1880         if(!retval)
1881                 fh->mmapped = 1;
1882         return retval;
1883 }
1884
1885 /******************************************************************************
1886  *
1887  *  reset_camera_struct_v4l
1888  *
1889  *  Sets all values to the defaults
1890  *****************************************************************************/
1891 static void reset_camera_struct_v4l(struct camera_data *cam)
1892 {
1893         /***
1894          * Fill in the v4l structures.  video_cap is filled in inside the VIDIOCCAP
1895          * Ioctl.  Here, just do the window and picture stucts.
1896          ***/
1897         cam->vp.palette = (u16) VIDEO_PALETTE_RGB24;    /* Is this right? */
1898         cam->vp.brightness = (u16) cam->params.color_params.brightness * 256;
1899         cam->vp.colour = (u16) cam->params.color_params.saturation * 256;
1900         cam->vp.contrast = (u16) cam->params.color_params.contrast * 256;
1901
1902         cam->vw.x = 0;
1903         cam->vw.y = 0;
1904         cam->vw.width = cam->params.roi.width;
1905         cam->vw.height = cam->params.roi.height;
1906         cam->vw.flags = 0;
1907         cam->vw.clipcount = 0;
1908
1909         cam->frame_size = buffer_size;
1910         cam->num_frames = num_buffers;
1911
1912         /* FlickerModes */
1913         cam->params.flicker_control.flicker_mode_req = flicker_mode;
1914         cam->params.flicker_control.mains_frequency = flicker_freq;
1915
1916         /* streamMode */
1917         cam->params.camera_state.stream_mode = alternate;
1918
1919         cam->pixelformat = V4L2_PIX_FMT_JPEG;
1920         v4l2_prio_init(&cam->prio);
1921         return;
1922 }
1923
1924 /***
1925  * The v4l video device structure initialized for this device
1926  ***/
1927 static struct file_operations fops_template = {
1928         .owner          = THIS_MODULE,
1929         .open           = cpia2_open,
1930         .release        = cpia2_close,
1931         .read           = cpia2_v4l_read,
1932         .poll           = cpia2_v4l_poll,
1933         .ioctl          = cpia2_ioctl,
1934         .llseek         = no_llseek,
1935         .compat_ioctl   = v4l_compat_ioctl32,
1936         .mmap           = cpia2_mmap,
1937 };
1938
1939 static struct video_device cpia2_template = {
1940         /* I could not find any place for the old .initialize initializer?? */
1941         .owner=         THIS_MODULE,
1942         .name=          "CPiA2 Camera",
1943         .type=          VID_TYPE_CAPTURE,
1944         .type2 =        V4L2_CAP_VIDEO_CAPTURE |
1945                         V4L2_CAP_STREAMING,
1946         .hardware=      VID_HARDWARE_CPIA2,
1947         .minor=         -1,
1948         .fops=          &fops_template,
1949         .release=       video_device_release,
1950 };
1951
1952 /******************************************************************************
1953  *
1954  *  cpia2_register_camera
1955  *
1956  *****************************************************************************/
1957 int cpia2_register_camera(struct camera_data *cam)
1958 {
1959         cam->vdev = video_device_alloc();
1960         if(!cam->vdev)
1961                 return -ENOMEM;
1962
1963         memcpy(cam->vdev, &cpia2_template, sizeof(cpia2_template));
1964         video_set_drvdata(cam->vdev, cam);
1965
1966         reset_camera_struct_v4l(cam);
1967
1968         /* register v4l device */
1969         if (video_register_device
1970             (cam->vdev, VFL_TYPE_GRABBER, video_nr) == -1) {
1971                 ERR("video_register_device failed\n");
1972                 video_device_release(cam->vdev);
1973                 return -ENODEV;
1974         }
1975
1976         return 0;
1977 }
1978
1979 /******************************************************************************
1980  *
1981  *  cpia2_unregister_camera
1982  *
1983  *****************************************************************************/
1984 void cpia2_unregister_camera(struct camera_data *cam)
1985 {
1986         if (!cam->open_count) {
1987                 video_unregister_device(cam->vdev);
1988         } else {
1989                 LOG("/dev/video%d removed while open, "
1990                     "deferring video_unregister_device\n",
1991                     cam->vdev->minor);
1992         }
1993 }
1994
1995 /******************************************************************************
1996  *
1997  *  check_parameters
1998  *
1999  *  Make sure that all user-supplied parameters are sensible
2000  *****************************************************************************/
2001 static void __init check_parameters(void)
2002 {
2003         if(buffer_size < PAGE_SIZE) {
2004                 buffer_size = PAGE_SIZE;
2005                 LOG("buffer_size too small, setting to %d\n", buffer_size);
2006         } else if(buffer_size > 1024*1024) {
2007                 /* arbitrary upper limiit */
2008                 buffer_size = 1024*1024;
2009                 LOG("buffer_size ridiculously large, setting to %d\n",
2010                     buffer_size);
2011         } else {
2012                 buffer_size += PAGE_SIZE-1;
2013                 buffer_size &= ~(PAGE_SIZE-1);
2014         }
2015
2016         if(num_buffers < 1) {
2017                 num_buffers = 1;
2018                 LOG("num_buffers too small, setting to %d\n", num_buffers);
2019         } else if(num_buffers > VIDEO_MAX_FRAME) {
2020                 num_buffers = VIDEO_MAX_FRAME;
2021                 LOG("num_buffers too large, setting to %d\n", num_buffers);
2022         }
2023
2024         if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) {
2025                 alternate = DEFAULT_ALT;
2026                 LOG("alternate specified is invalid, using %d\n", alternate);
2027         }
2028
2029         if (flicker_mode != NEVER_FLICKER && flicker_mode != ANTI_FLICKER_ON) {
2030                 flicker_mode = NEVER_FLICKER;
2031                 LOG("Flicker mode specified is invalid, using %d\n",
2032                     flicker_mode);
2033         }
2034
2035         if (flicker_freq != FLICKER_50 && flicker_freq != FLICKER_60) {
2036                 flicker_freq = FLICKER_60;
2037                 LOG("Flicker mode specified is invalid, using %d\n",
2038                     flicker_freq);
2039         }
2040
2041         if(video_nr < -1 || video_nr > 64) {
2042                 video_nr = -1;
2043                 LOG("invalid video_nr specified, must be -1 to 64\n");
2044         }
2045
2046         DBG("Using %d buffers, each %d bytes, alternate=%d\n",
2047             num_buffers, buffer_size, alternate);
2048 }
2049
2050 /************   Module Stuff ***************/
2051
2052
2053 /******************************************************************************
2054  *
2055  * cpia2_init/module_init
2056  *
2057  *****************************************************************************/
2058 static int __init cpia2_init(void)
2059 {
2060         LOG("%s v%d.%d.%d\n",
2061             ABOUT, CPIA2_MAJ_VER, CPIA2_MIN_VER, CPIA2_PATCH_VER);
2062         check_parameters();
2063         cpia2_usb_init();
2064         return 0;
2065 }
2066
2067
2068 /******************************************************************************
2069  *
2070  * cpia2_exit/module_exit
2071  *
2072  *****************************************************************************/
2073 static void __exit cpia2_exit(void)
2074 {
2075         cpia2_usb_cleanup();
2076         schedule_timeout(2 * HZ);
2077 }
2078
2079 module_init(cpia2_init);
2080 module_exit(cpia2_exit);
2081