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/videodev2.h>
  41 #include <linux/stringify.h>
  42 #include <media/v4l2-ioctl.h>
  43
  44 #include "cpia2.h"
  45 #include "cpia2dev.h"
  46
  47 static int video_nr = -1;
  48 module_param(video_nr, int, 0);
  49 MODULE_PARM_DESC(video_nr,"video device to register (0=/dev/video0, etc)");
  50
  51 static int buffer_size = 68*1024;
  52 module_param(buffer_size, int, 0);
  53 MODULE_PARM_DESC(buffer_size, "Size for each frame buffer in bytes (default 68k)");
  54
  55 static int num_buffers = 3;
  56 module_param(num_buffers, int, 0);
  57 MODULE_PARM_DESC(num_buffers, "Number of frame buffers (1-"
  58                  __stringify(VIDEO_MAX_FRAME) ", default 3)");
  59
  60 static int alternate = DEFAULT_ALT;
  61 module_param(alternate, int, 0);
  62 MODULE_PARM_DESC(alternate, "USB Alternate (" __stringify(USBIF_ISO_1) "-"
  63                  __stringify(USBIF_ISO_6) ", default "
  64                  __stringify(DEFAULT_ALT) ")");
  65
  66 static int flicker_freq = 60;
  67 module_param(flicker_freq, int, 0);
  68 MODULE_PARM_DESC(flicker_freq, "Flicker frequency (" __stringify(50) "or"
  69                  __stringify(60) ", default "
  70                  __stringify(60) ")");
  71
  72 static int flicker_mode = NEVER_FLICKER;
  73 module_param(flicker_mode, int, 0);
  74 MODULE_PARM_DESC(flicker_mode,
  75                  "Flicker supression (" __stringify(NEVER_FLICKER) "or"
  76                  __stringify(ANTI_FLICKER_ON) ", default "
  77                  __stringify(NEVER_FLICKER) ")");
  78
  79 MODULE_AUTHOR("Steve Miller (STMicroelectronics) <steve.miller@st.com>");
  80 MODULE_DESCRIPTION("V4L-driver for STMicroelectronics CPiA2 based cameras");
  81 MODULE_SUPPORTED_DEVICE("video");
  82 MODULE_LICENSE("GPL");
  83
  84 #define ABOUT "V4L-Driver for Vision CPiA2 based cameras"
  85
  86 struct control_menu_info {
  87         int value;
  88         char name[32];
  89 };
  90
  91 static struct control_menu_info framerate_controls[] =
  92 {
  93         { CPIA2_VP_FRAMERATE_6_25, "6.25 fps" },
  94         { CPIA2_VP_FRAMERATE_7_5,  "7.5 fps"  },
  95         { CPIA2_VP_FRAMERATE_12_5, "12.5 fps" },
  96         { CPIA2_VP_FRAMERATE_15,   "15 fps"   },
  97         { CPIA2_VP_FRAMERATE_25,   "25 fps"   },
  98         { CPIA2_VP_FRAMERATE_30,   "30 fps"   },
  99 };
 100 #define NUM_FRAMERATE_CONTROLS (ARRAY_SIZE(framerate_controls))
 101
 102 static struct control_menu_info flicker_controls[] =
 103 {
 104         { NEVER_FLICKER, "Off" },
 105         { FLICKER_50,    "50 Hz" },
 106         { FLICKER_60,    "60 Hz"  },
 107 };
 108 #define NUM_FLICKER_CONTROLS (ARRAY_SIZE(flicker_controls))
 109
 110 static struct control_menu_info lights_controls[] =
 111 {
 112         { 0,   "Off" },
 113         { 64,  "Top" },
 114         { 128, "Bottom"  },
 115         { 192, "Both"  },
 116 };
 117 #define NUM_LIGHTS_CONTROLS (ARRAY_SIZE(lights_controls))
 118 #define GPIO_LIGHTS_MASK 192
 119
 120 static struct v4l2_queryctrl controls[] = {
 121         {
 122                 .id            = V4L2_CID_BRIGHTNESS,
 123                 .type          = V4L2_CTRL_TYPE_INTEGER,
 124                 .name          = "Brightness",
 125                 .minimum       = 0,
 126                 .maximum       = 255,
 127                 .step          = 1,
 128                 .default_value = DEFAULT_BRIGHTNESS,
 129         },
 130         {
 131                 .id            = V4L2_CID_CONTRAST,
 132                 .type          = V4L2_CTRL_TYPE_INTEGER,
 133                 .name          = "Contrast",
 134                 .minimum       = 0,
 135                 .maximum       = 255,
 136                 .step          = 1,
 137                 .default_value = DEFAULT_CONTRAST,
 138         },
 139         {
 140                 .id            = V4L2_CID_SATURATION,
 141                 .type          = V4L2_CTRL_TYPE_INTEGER,
 142                 .name          = "Saturation",
 143                 .minimum       = 0,
 144                 .maximum       = 255,
 145                 .step          = 1,
 146                 .default_value = DEFAULT_SATURATION,
 147         },
 148         {
 149                 .id            = V4L2_CID_HFLIP,
 150                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
 151                 .name          = "Mirror Horizontally",
 152                 .minimum       = 0,
 153                 .maximum       = 1,
 154                 .step          = 1,
 155                 .default_value = 0,
 156         },
 157         {
 158                 .id            = V4L2_CID_VFLIP,
 159                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
 160                 .name          = "Flip Vertically",
 161                 .minimum       = 0,
 162                 .maximum       = 1,
 163                 .step          = 1,
 164                 .default_value = 0,
 165         },
 166         {
 167                 .id            = CPIA2_CID_TARGET_KB,
 168                 .type          = V4L2_CTRL_TYPE_INTEGER,
 169                 .name          = "Target KB",
 170                 .minimum       = 0,
 171                 .maximum       = 255,
 172                 .step          = 1,
 173                 .default_value = DEFAULT_TARGET_KB,
 174         },
 175         {
 176                 .id            = CPIA2_CID_GPIO,
 177                 .type          = V4L2_CTRL_TYPE_INTEGER,
 178                 .name          = "GPIO",
 179                 .minimum       = 0,
 180                 .maximum       = 255,
 181                 .step          = 1,
 182                 .default_value = 0,
 183         },
 184         {
 185                 .id            = CPIA2_CID_FLICKER_MODE,
 186                 .type          = V4L2_CTRL_TYPE_MENU,
 187                 .name          = "Flicker Reduction",
 188                 .minimum       = 0,
 189                 .maximum       = NUM_FLICKER_CONTROLS-1,
 190                 .step          = 1,
 191                 .default_value = 0,
 192         },
 193         {
 194                 .id            = CPIA2_CID_FRAMERATE,
 195                 .type          = V4L2_CTRL_TYPE_MENU,
 196                 .name          = "Framerate",
 197                 .minimum       = 0,
 198                 .maximum       = NUM_FRAMERATE_CONTROLS-1,
 199                 .step          = 1,
 200                 .default_value = NUM_FRAMERATE_CONTROLS-1,
 201         },
 202         {
 203                 .id            = CPIA2_CID_USB_ALT,
 204                 .type          = V4L2_CTRL_TYPE_INTEGER,
 205                 .name          = "USB Alternate",
 206                 .minimum       = USBIF_ISO_1,
 207                 .maximum       = USBIF_ISO_6,
 208                 .step          = 1,
 209                 .default_value = DEFAULT_ALT,
 210         },
 211         {
 212                 .id            = CPIA2_CID_LIGHTS,
 213                 .type          = V4L2_CTRL_TYPE_MENU,
 214                 .name          = "Lights",
 215                 .minimum       = 0,
 216                 .maximum       = NUM_LIGHTS_CONTROLS-1,
 217                 .step          = 1,
 218                 .default_value = 0,
 219         },
 220         {
 221                 .id            = CPIA2_CID_RESET_CAMERA,
 222                 .type          = V4L2_CTRL_TYPE_BUTTON,
 223                 .name          = "Reset Camera",
 224                 .minimum       = 0,
 225                 .maximum       = 0,
 226                 .step          = 0,
 227                 .default_value = 0,
 228         },
 229 };
 230 #define NUM_CONTROLS (ARRAY_SIZE(controls))
 231
 232
 233 /******************************************************************************
 234  *
 235  *  cpia2_open
 236  *
 237  *****************************************************************************/
 238 static int cpia2_open(struct file *file)
 239 {
 240         struct camera_data *cam = video_drvdata(file);
 241         struct cpia2_fh *fh;
 242
 243         if (!cam) {
 244                 ERR("Internal error, camera_data not found!\n");
 245                 return -ENODEV;
 246         }
 247
 248         if (!cam->present)
 249                 return -ENODEV;
 250
 251         if (cam->open_count == 0) {
 252                 if (cpia2_allocate_buffers(cam))
 253                         return -ENOMEM;
 254
 255                 /* reset the camera */
 256                 if (cpia2_reset_camera(cam) < 0)
 257                         return -EIO;
 258
 259                 cam->APP_len = 0;
 260                 cam->COM_len = 0;
 261         }
 262
 263         fh = kmalloc(sizeof(*fh), GFP_KERNEL);
 264         if (!fh)
 265                 return -ENOMEM;
 266         file->private_data = fh;
 267         fh->prio = V4L2_PRIORITY_UNSET;
 268         v4l2_prio_open(&cam->prio, &fh->prio);
 269         fh->mmapped = 0;
 270
 271         ++cam->open_count;
 272
 273         cpia2_dbg_dump_registers(cam);
 274         return 0;
 275 }
 276
 277 /******************************************************************************
 278  *
 279  *  cpia2_close
 280  *
 281  *****************************************************************************/
 282 static int cpia2_close(struct file *file)
 283 {
 284         struct video_device *dev = video_devdata(file);
 285         struct camera_data *cam = video_get_drvdata(dev);
 286         struct cpia2_fh *fh = file->private_data;
 287
 288         if (cam->present &&
 289             (cam->open_count == 1 || fh->prio == V4L2_PRIORITY_RECORD)) {
 290                 cpia2_usb_stream_stop(cam);
 291
 292                 if (cam->open_count == 1) {
 293                         /* save camera state for later open */
 294                         cpia2_save_camera_state(cam);
 295
 296                         cpia2_set_low_power(cam);
 297                         cpia2_free_buffers(cam);
 298                 }
 299         }
 300
 301         if (fh->mmapped)
 302                 cam->mmapped = 0;
 303         v4l2_prio_close(&cam->prio, fh->prio);
 304         file->private_data = NULL;
 305         kfree(fh);
 306
 307         if (--cam->open_count == 0) {
 308                 cpia2_free_buffers(cam);
 309                 if (!cam->present) {
 310                         video_unregister_device(dev);
 311                         kfree(cam);
 312                         return 0;
 313                 }
 314         }
 315
 316         return 0;
 317 }
 318
 319 /******************************************************************************
 320  *
 321  *  cpia2_v4l_read
 322  *
 323  *****************************************************************************/
 324 static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count,
 325                               loff_t *off)
 326 {
 327         struct camera_data *cam = video_drvdata(file);
 328         int noblock = file->f_flags&O_NONBLOCK;
 329
 330         struct cpia2_fh *fh = file->private_data;
 331
 332         if(!cam)
 333                 return -EINVAL;
 334
 335         /* Priority check */
 336         if(fh->prio != V4L2_PRIORITY_RECORD) {
 337                 return -EBUSY;
 338         }
 339
 340         return cpia2_read(cam, buf, count, noblock);
 341 }
 342
 343
 344 /******************************************************************************
 345  *
 346  *  cpia2_v4l_poll
 347  *
 348  *****************************************************************************/
 349 static unsigned int cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait)
 350 {
 351         struct camera_data *cam = video_drvdata(filp);
 352         struct cpia2_fh *fh = filp->private_data;
 353
 354         if(!cam)
 355                 return POLLERR;
 356
 357         /* Priority check */
 358         if(fh->prio != V4L2_PRIORITY_RECORD) {
 359                 return POLLERR;
 360         }
 361
 362         return cpia2_poll(cam, filp, wait);
 363 }
 364
 365
 366 static int sync(struct camera_data *cam, int frame_nr)
 367 {
 368         struct framebuf *frame = &cam->buffers[frame_nr];
 369
 370         while (1) {
 371                 if (frame->status == FRAME_READY)
 372                         return 0;
 373
 374                 if (!cam->streaming) {
 375                         frame->status = FRAME_READY;
 376                         frame->length = 0;
 377                         return 0;
 378                 }
 379
 380                 mutex_unlock(&cam->v4l2_lock);
 381                 wait_event_interruptible(cam->wq_stream,
 382                                          !cam->streaming ||
 383                                          frame->status == FRAME_READY);
 384                 mutex_lock(&cam->v4l2_lock);
 385                 if (signal_pending(current))
 386                         return -ERESTARTSYS;
 387                 if(!cam->present)
 388                         return -ENOTTY;
 389         }
 390 }
 391
 392 /******************************************************************************
 393  *
 394  *  ioctl_set_gpio
 395  *
 396  *****************************************************************************/
 397
 398 static int ioctl_set_gpio(void *arg, struct camera_data *cam)
 399 {
 400         __u32 gpio_val;
 401
 402         gpio_val = *(__u32*) arg;
 403
 404         if (gpio_val &~ 0xFFU)
 405                 return -EINVAL;
 406
 407         return cpia2_set_gpio(cam, (unsigned char)gpio_val);
 408 }
 409
 410 /******************************************************************************
 411  *
 412  *  ioctl_querycap
 413  *
 414  *  V4L2 device capabilities
 415  *
 416  *****************************************************************************/
 417
 418 static int ioctl_querycap(void *arg, struct camera_data *cam)
 419 {
 420         struct v4l2_capability *vc = arg;
 421
 422         memset(vc, 0, sizeof(*vc));
 423         strcpy(vc->driver, "cpia2");
 424
 425         if (cam->params.pnp_id.product == 0x151)
 426                 strcpy(vc->card, "QX5 Microscope");
 427         else
 428                 strcpy(vc->card, "CPiA2 Camera");
 429         switch (cam->params.pnp_id.device_type) {
 430         case DEVICE_STV_672:
 431                 strcat(vc->card, " (672/");
 432                 break;
 433         case DEVICE_STV_676:
 434                 strcat(vc->card, " (676/");
 435                 break;
 436         default:
 437                 strcat(vc->card, " (???/");
 438                 break;
 439         }
 440         switch (cam->params.version.sensor_flags) {
 441         case CPIA2_VP_SENSOR_FLAGS_404:
 442                 strcat(vc->card, "404)");
 443                 break;
 444         case CPIA2_VP_SENSOR_FLAGS_407:
 445                 strcat(vc->card, "407)");
 446                 break;
 447         case CPIA2_VP_SENSOR_FLAGS_409:
 448                 strcat(vc->card, "409)");
 449                 break;
 450         case CPIA2_VP_SENSOR_FLAGS_410:
 451                 strcat(vc->card, "410)");
 452                 break;
 453         case CPIA2_VP_SENSOR_FLAGS_500:
 454                 strcat(vc->card, "500)");
 455                 break;
 456         default:
 457                 strcat(vc->card, "???)");
 458                 break;
 459         }
 460
 461         if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0)
 462                 memset(vc->bus_info,0, sizeof(vc->bus_info));
 463
 464         vc->version = KERNEL_VERSION(CPIA2_MAJ_VER, CPIA2_MIN_VER,
 465                                      CPIA2_PATCH_VER);
 466
 467         vc->capabilities = V4L2_CAP_VIDEO_CAPTURE |
 468                            V4L2_CAP_READWRITE |
 469                            V4L2_CAP_STREAMING;
 470
 471         return 0;
 472 }
 473
 474 /******************************************************************************
 475  *
 476  *  ioctl_input
 477  *
 478  *  V4L2 input get/set/enumerate
 479  *
 480  *****************************************************************************/
 481
 482 static int ioctl_input(unsigned int ioclt_nr,void *arg,struct camera_data *cam)
 483 {
 484         struct v4l2_input *i = arg;
 485
 486         if(ioclt_nr  != VIDIOC_G_INPUT) {
 487                 if (i->index != 0)
 488                        return -EINVAL;
 489         }
 490
 491         memset(i, 0, sizeof(*i));
 492         strcpy(i->name, "Camera");
 493         i->type = V4L2_INPUT_TYPE_CAMERA;
 494
 495         return 0;
 496 }
 497
 498 /******************************************************************************
 499  *
 500  *  ioctl_enum_fmt
 501  *
 502  *  V4L2 format enumerate
 503  *
 504  *****************************************************************************/
 505
 506 static int ioctl_enum_fmt(void *arg,struct camera_data *cam)
 507 {
 508         struct v4l2_fmtdesc *f = arg;
 509         int index = f->index;
 510
 511         if (index < 0 || index > 1)
 512                return -EINVAL;
 513
 514         memset(f, 0, sizeof(*f));
 515         f->index = index;
 516         f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 517         f->flags = V4L2_FMT_FLAG_COMPRESSED;
 518         switch(index) {
 519         case 0:
 520                 strcpy(f->description, "MJPEG");
 521                 f->pixelformat = V4L2_PIX_FMT_MJPEG;
 522                 break;
 523         case 1:
 524                 strcpy(f->description, "JPEG");
 525                 f->pixelformat = V4L2_PIX_FMT_JPEG;
 526                 break;
 527         default:
 528                 return -EINVAL;
 529         }
 530
 531         return 0;
 532 }
 533
 534 /******************************************************************************
 535  *
 536  *  ioctl_try_fmt
 537  *
 538  *  V4L2 format try
 539  *
 540  *****************************************************************************/
 541
 542 static int ioctl_try_fmt(void *arg,struct camera_data *cam)
 543 {
 544         struct v4l2_format *f = arg;
 545
 546         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 547                return -EINVAL;
 548
 549         if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG &&
 550             f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
 551                return -EINVAL;
 552
 553         f->fmt.pix.field = V4L2_FIELD_NONE;
 554         f->fmt.pix.bytesperline = 0;
 555         f->fmt.pix.sizeimage = cam->frame_size;
 556         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 557         f->fmt.pix.priv = 0;
 558
 559         switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
 560         case VIDEOSIZE_VGA:
 561                 f->fmt.pix.width = 640;
 562                 f->fmt.pix.height = 480;
 563                 break;
 564         case VIDEOSIZE_CIF:
 565                 f->fmt.pix.width = 352;
 566                 f->fmt.pix.height = 288;
 567                 break;
 568         case VIDEOSIZE_QVGA:
 569                 f->fmt.pix.width = 320;
 570                 f->fmt.pix.height = 240;
 571                 break;
 572         case VIDEOSIZE_288_216:
 573                 f->fmt.pix.width = 288;
 574                 f->fmt.pix.height = 216;
 575                 break;
 576         case VIDEOSIZE_256_192:
 577                 f->fmt.pix.width = 256;
 578                 f->fmt.pix.height = 192;
 579                 break;
 580         case VIDEOSIZE_224_168:
 581                 f->fmt.pix.width = 224;
 582                 f->fmt.pix.height = 168;
 583                 break;
 584         case VIDEOSIZE_192_144:
 585                 f->fmt.pix.width = 192;
 586                 f->fmt.pix.height = 144;
 587                 break;
 588         case VIDEOSIZE_QCIF:
 589         default:
 590                 f->fmt.pix.width = 176;
 591                 f->fmt.pix.height = 144;
 592                 break;
 593         }
 594
 595         return 0;
 596 }
 597
 598 /******************************************************************************
 599  *
 600  *  ioctl_set_fmt
 601  *
 602  *  V4L2 format set
 603  *
 604  *****************************************************************************/
 605
 606 static int ioctl_set_fmt(void *arg,struct camera_data *cam, struct cpia2_fh *fh)
 607 {
 608         struct v4l2_format *f = arg;
 609         int err, frame;
 610
 611         err = ioctl_try_fmt(arg, cam);
 612         if(err != 0)
 613                 return err;
 614
 615         /* Ensure that only this process can change the format. */
 616         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
 617         if(err != 0) {
 618                 return err;
 619         }
 620
 621         cam->pixelformat = f->fmt.pix.pixelformat;
 622
 623         /* NOTE: This should be set to 1 for MJPEG, but some apps don't handle
 624          * the missing Huffman table properly. */
 625         cam->params.compression.inhibit_htables = 0;
 626                 /*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/
 627
 628         /* we set the video window to something smaller or equal to what
 629          * is requested by the user???
 630          */
 631         DBG("Requested width = %d, height = %d\n",
 632             f->fmt.pix.width, f->fmt.pix.height);
 633         if (f->fmt.pix.width != cam->width ||
 634             f->fmt.pix.height != cam->height) {
 635                 cam->width = f->fmt.pix.width;
 636                 cam->height = f->fmt.pix.height;
 637                 cam->params.roi.width = f->fmt.pix.width;
 638                 cam->params.roi.height = f->fmt.pix.height;
 639                 cpia2_set_format(cam);
 640         }
 641
 642         for (frame = 0; frame < cam->num_frames; ++frame) {
 643                 if (cam->buffers[frame].status == FRAME_READING)
 644                         if ((err = sync(cam, frame)) < 0)
 645                                 return err;
 646
 647                 cam->buffers[frame].status = FRAME_EMPTY;
 648         }
 649
 650         return 0;
 651 }
 652
 653 /******************************************************************************
 654  *
 655  *  ioctl_get_fmt
 656  *
 657  *  V4L2 format get
 658  *
 659  *****************************************************************************/
 660
 661 static int ioctl_get_fmt(void *arg,struct camera_data *cam)
 662 {
 663         struct v4l2_format *f = arg;
 664
 665         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 666                return -EINVAL;
 667
 668         f->fmt.pix.width = cam->width;
 669         f->fmt.pix.height = cam->height;
 670         f->fmt.pix.pixelformat = cam->pixelformat;
 671         f->fmt.pix.field = V4L2_FIELD_NONE;
 672         f->fmt.pix.bytesperline = 0;
 673         f->fmt.pix.sizeimage = cam->frame_size;
 674         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 675         f->fmt.pix.priv = 0;
 676
 677         return 0;
 678 }
 679
 680 /******************************************************************************
 681  *
 682  *  ioctl_cropcap
 683  *
 684  *  V4L2 query cropping capabilities
 685  *  NOTE: cropping is currently disabled
 686  *
 687  *****************************************************************************/
 688
 689 static int ioctl_cropcap(void *arg,struct camera_data *cam)
 690 {
 691         struct v4l2_cropcap *c = arg;
 692
 693         if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 694                return -EINVAL;
 695
 696         c->bounds.left = 0;
 697         c->bounds.top = 0;
 698         c->bounds.width = cam->width;
 699         c->bounds.height = cam->height;
 700         c->defrect.left = 0;
 701         c->defrect.top = 0;
 702         c->defrect.width = cam->width;
 703         c->defrect.height = cam->height;
 704         c->pixelaspect.numerator = 1;
 705         c->pixelaspect.denominator = 1;
 706
 707         return 0;
 708 }
 709
 710 /******************************************************************************
 711  *
 712  *  ioctl_queryctrl
 713  *
 714  *  V4L2 query possible control variables
 715  *
 716  *****************************************************************************/
 717
 718 static int ioctl_queryctrl(void *arg,struct camera_data *cam)
 719 {
 720         struct v4l2_queryctrl *c = arg;
 721         int i;
 722
 723         for(i=0; i<NUM_CONTROLS; ++i) {
 724                 if(c->id == controls[i].id) {
 725                         memcpy(c, controls+i, sizeof(*c));
 726                         break;
 727                 }
 728         }
 729
 730         if(i == NUM_CONTROLS)
 731                 return -EINVAL;
 732
 733         /* Some devices have additional limitations */
 734         switch(c->id) {
 735         case V4L2_CID_BRIGHTNESS:
 736                 /***
 737                  * Don't let the register be set to zero - bug in VP4
 738                  * flash of full brightness
 739                  ***/
 740                 if (cam->params.pnp_id.device_type == DEVICE_STV_672)
 741                         c->minimum = 1;
 742                 break;
 743         case V4L2_CID_VFLIP:
 744                 // VP5 Only
 745                 if(cam->params.pnp_id.device_type == DEVICE_STV_672)
 746                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
 747                 break;
 748         case CPIA2_CID_FRAMERATE:
 749                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
 750                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
 751                         // Maximum 15fps
 752                         for(i=0; i<c->maximum; ++i) {
 753                                 if(framerate_controls[i].value ==
 754                                    CPIA2_VP_FRAMERATE_15) {
 755                                         c->maximum = i;
 756                                         c->default_value = i;
 757                                 }
 758                         }
 759                 }
 760                 break;
 761         case CPIA2_CID_FLICKER_MODE:
 762                 // Flicker control only valid for 672.
 763                 if(cam->params.pnp_id.device_type != DEVICE_STV_672)
 764                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
 765                 break;
 766         case CPIA2_CID_LIGHTS:
 767                 // Light control only valid for the QX5 Microscope.
 768                 if(cam->params.pnp_id.product != 0x151)
 769                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
 770                 break;
 771         default:
 772                 break;
 773         }
 774
 775         return 0;
 776 }
 777
 778 /******************************************************************************
 779  *
 780  *  ioctl_querymenu
 781  *
 782  *  V4L2 query possible control variables
 783  *
 784  *****************************************************************************/
 785
 786 static int ioctl_querymenu(void *arg,struct camera_data *cam)
 787 {
 788         struct v4l2_querymenu *m = arg;
 789
 790         memset(m->name, 0, sizeof(m->name));
 791         m->reserved = 0;
 792
 793         switch(m->id) {
 794         case CPIA2_CID_FLICKER_MODE:
 795                 if (m->index >= NUM_FLICKER_CONTROLS)
 796                         return -EINVAL;
 797
 798                 strcpy(m->name, flicker_controls[m->index].name);
 799                 break;
 800         case CPIA2_CID_FRAMERATE:
 801             {
 802                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
 803                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
 804                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
 805                         // Maximum 15fps
 806                         int i;
 807                         for(i=0; i<maximum; ++i) {
 808                                 if(framerate_controls[i].value ==
 809                                    CPIA2_VP_FRAMERATE_15)
 810                                         maximum = i;
 811                         }
 812                 }
 813                 if (m->index > maximum)
 814                         return -EINVAL;
 815
 816                 strcpy(m->name, framerate_controls[m->index].name);
 817                 break;
 818             }
 819         case CPIA2_CID_LIGHTS:
 820                 if (m->index >= NUM_LIGHTS_CONTROLS)
 821                         return -EINVAL;
 822
 823                 strcpy(m->name, lights_controls[m->index].name);
 824                 break;
 825         default:
 826                 return -EINVAL;
 827         }
 828
 829         return 0;
 830 }
 831
 832 /******************************************************************************
 833  *
 834  *  ioctl_g_ctrl
 835  *
 836  *  V4L2 get the value of a control variable
 837  *
 838  *****************************************************************************/
 839
 840 static int ioctl_g_ctrl(void *arg,struct camera_data *cam)
 841 {
 842         struct v4l2_control *c = arg;
 843
 844         switch(c->id) {
 845         case V4L2_CID_BRIGHTNESS:
 846                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_BRIGHTNESS,
 847                                  TRANSFER_READ, 0);
 848                 c->value = cam->params.color_params.brightness;
 849                 break;
 850         case V4L2_CID_CONTRAST:
 851                 cpia2_do_command(cam, CPIA2_CMD_GET_CONTRAST,
 852                                  TRANSFER_READ, 0);
 853                 c->value = cam->params.color_params.contrast;
 854                 break;
 855         case V4L2_CID_SATURATION:
 856                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_SATURATION,
 857                                  TRANSFER_READ, 0);
 858                 c->value = cam->params.color_params.saturation;
 859                 break;
 860         case V4L2_CID_HFLIP:
 861                 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
 862                                  TRANSFER_READ, 0);
 863                 c->value = (cam->params.vp_params.user_effects &
 864                             CPIA2_VP_USER_EFFECTS_MIRROR) != 0;
 865                 break;
 866         case V4L2_CID_VFLIP:
 867                 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
 868                                  TRANSFER_READ, 0);
 869                 c->value = (cam->params.vp_params.user_effects &
 870                             CPIA2_VP_USER_EFFECTS_FLIP) != 0;
 871                 break;
 872         case CPIA2_CID_TARGET_KB:
 873                 c->value = cam->params.vc_params.target_kb;
 874                 break;
 875         case CPIA2_CID_GPIO:
 876                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
 877                                  TRANSFER_READ, 0);
 878                 c->value = cam->params.vp_params.gpio_data;
 879                 break;
 880         case CPIA2_CID_FLICKER_MODE:
 881         {
 882                 int i, mode;
 883                 cpia2_do_command(cam, CPIA2_CMD_GET_FLICKER_MODES,
 884                                  TRANSFER_READ, 0);
 885                 if(cam->params.flicker_control.cam_register &
 886                    CPIA2_VP_FLICKER_MODES_NEVER_FLICKER) {
 887                         mode = NEVER_FLICKER;
 888                 } else {
 889                     if(cam->params.flicker_control.cam_register &
 890                        CPIA2_VP_FLICKER_MODES_50HZ) {
 891                         mode = FLICKER_50;
 892                     } else {
 893                         mode = FLICKER_60;
 894                     }
 895                 }
 896                 for(i=0; i<NUM_FLICKER_CONTROLS; i++) {
 897                         if(flicker_controls[i].value == mode) {
 898                                 c->value = i;
 899                                 break;
 900                         }
 901                 }
 902                 if(i == NUM_FLICKER_CONTROLS)
 903                         return -EINVAL;
 904                 break;
 905         }
 906         case CPIA2_CID_FRAMERATE:
 907         {
 908                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
 909                 int i;
 910                 for(i=0; i<= maximum; i++) {
 911                         if(cam->params.vp_params.frame_rate ==
 912                            framerate_controls[i].value)
 913                                 break;
 914                 }
 915                 if(i > maximum)
 916                         return -EINVAL;
 917                 c->value = i;
 918                 break;
 919         }
 920         case CPIA2_CID_USB_ALT:
 921                 c->value = cam->params.camera_state.stream_mode;
 922                 break;
 923         case CPIA2_CID_LIGHTS:
 924         {
 925                 int i;
 926                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
 927                                  TRANSFER_READ, 0);
 928                 for(i=0; i<NUM_LIGHTS_CONTROLS; i++) {
 929                         if((cam->params.vp_params.gpio_data&GPIO_LIGHTS_MASK) ==
 930                            lights_controls[i].value) {
 931                                 break;
 932                         }
 933                 }
 934                 if(i == NUM_LIGHTS_CONTROLS)
 935                         return -EINVAL;
 936                 c->value = i;
 937                 break;
 938         }
 939         case CPIA2_CID_RESET_CAMERA:
 940                 return -EINVAL;
 941         default:
 942                 return -EINVAL;
 943         }
 944
 945         DBG("Get control id:%d, value:%d\n", c->id, c->value);
 946
 947         return 0;
 948 }
 949
 950 /******************************************************************************
 951  *
 952  *  ioctl_s_ctrl
 953  *
 954  *  V4L2 set the value of a control variable
 955  *
 956  *****************************************************************************/
 957
 958 static int ioctl_s_ctrl(void *arg,struct camera_data *cam)
 959 {
 960         struct v4l2_control *c = arg;
 961         int i;
 962         int retval = 0;
 963
 964         DBG("Set control id:%d, value:%d\n", c->id, c->value);
 965
 966         /* Check that the value is in range */
 967         for(i=0; i<NUM_CONTROLS; i++) {
 968                 if(c->id == controls[i].id) {
 969                         if(c->value < controls[i].minimum ||
 970                            c->value > controls[i].maximum) {
 971                                 return -EINVAL;
 972                         }
 973                         break;
 974                 }
 975         }
 976         if(i == NUM_CONTROLS)
 977                 return -EINVAL;
 978
 979         switch(c->id) {
 980         case V4L2_CID_BRIGHTNESS:
 981                 cpia2_set_brightness(cam, c->value);
 982                 break;
 983         case V4L2_CID_CONTRAST:
 984                 cpia2_set_contrast(cam, c->value);
 985                 break;
 986         case V4L2_CID_SATURATION:
 987                 cpia2_set_saturation(cam, c->value);
 988                 break;
 989         case V4L2_CID_HFLIP:
 990                 cpia2_set_property_mirror(cam, c->value);
 991                 break;
 992         case V4L2_CID_VFLIP:
 993                 cpia2_set_property_flip(cam, c->value);
 994                 break;
 995         case CPIA2_CID_TARGET_KB:
 996                 retval = cpia2_set_target_kb(cam, c->value);
 997                 break;
 998         case CPIA2_CID_GPIO:
 999                 retval = cpia2_set_gpio(cam, c->value);
1000                 break;
1001         case CPIA2_CID_FLICKER_MODE:
1002                 retval = cpia2_set_flicker_mode(cam,
1003                                               flicker_controls[c->value].value);
1004                 break;
1005         case CPIA2_CID_FRAMERATE:
1006                 retval = cpia2_set_fps(cam, framerate_controls[c->value].value);
1007                 break;
1008         case CPIA2_CID_USB_ALT:
1009                 retval = cpia2_usb_change_streaming_alternate(cam, c->value);
1010                 break;
1011         case CPIA2_CID_LIGHTS:
1012                 retval = cpia2_set_gpio(cam, lights_controls[c->value].value);
1013                 break;
1014         case CPIA2_CID_RESET_CAMERA:
1015                 cpia2_usb_stream_pause(cam);
1016                 cpia2_reset_camera(cam);
1017                 cpia2_usb_stream_resume(cam);
1018                 break;
1019         default:
1020                 retval = -EINVAL;
1021         }
1022
1023         return retval;
1024 }
1025
1026 /******************************************************************************
1027  *
1028  *  ioctl_g_jpegcomp
1029  *
1030  *  V4L2 get the JPEG compression parameters
1031  *
1032  *****************************************************************************/
1033
1034 static int ioctl_g_jpegcomp(void *arg,struct camera_data *cam)
1035 {
1036         struct v4l2_jpegcompression *parms = arg;
1037
1038         memset(parms, 0, sizeof(*parms));
1039
1040         parms->quality = 80; // TODO: Can this be made meaningful?
1041
1042         parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI;
1043         if(!cam->params.compression.inhibit_htables) {
1044                 parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT;
1045         }
1046
1047         parms->APPn = cam->APPn;
1048         parms->APP_len = cam->APP_len;
1049         if(cam->APP_len > 0) {
1050                 memcpy(parms->APP_data, cam->APP_data, cam->APP_len);
1051                 parms->jpeg_markers |= V4L2_JPEG_MARKER_APP;
1052         }
1053
1054         parms->COM_len = cam->COM_len;
1055         if(cam->COM_len > 0) {
1056                 memcpy(parms->COM_data, cam->COM_data, cam->COM_len);
1057                 parms->jpeg_markers |= JPEG_MARKER_COM;
1058         }
1059
1060         DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n",
1061             parms->APP_len, parms->COM_len);
1062
1063         return 0;
1064 }
1065
1066 /******************************************************************************
1067  *
1068  *  ioctl_s_jpegcomp
1069  *
1070  *  V4L2 set the JPEG compression parameters
1071  *  NOTE: quality and some jpeg_markers are ignored.
1072  *
1073  *****************************************************************************/
1074
1075 static int ioctl_s_jpegcomp(void *arg,struct camera_data *cam)
1076 {
1077         struct v4l2_jpegcompression *parms = arg;
1078
1079         DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n",
1080             parms->APP_len, parms->COM_len);
1081
1082         cam->params.compression.inhibit_htables =
1083                 !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
1084
1085         if(parms->APP_len != 0) {
1086                 if(parms->APP_len > 0 &&
1087                    parms->APP_len <= sizeof(cam->APP_data) &&
1088                    parms->APPn >= 0 && parms->APPn <= 15) {
1089                         cam->APPn = parms->APPn;
1090                         cam->APP_len = parms->APP_len;
1091                         memcpy(cam->APP_data, parms->APP_data, parms->APP_len);
1092                 } else {
1093                         LOG("Bad APPn Params n=%d len=%d\n",
1094                             parms->APPn, parms->APP_len);
1095                         return -EINVAL;
1096                 }
1097         } else {
1098                 cam->APP_len = 0;
1099         }
1100
1101         if(parms->COM_len != 0) {
1102                 if(parms->COM_len > 0 &&
1103                    parms->COM_len <= sizeof(cam->COM_data)) {
1104                         cam->COM_len = parms->COM_len;
1105                         memcpy(cam->COM_data, parms->COM_data, parms->COM_len);
1106                 } else {
1107                         LOG("Bad COM_len=%d\n", parms->COM_len);
1108                         return -EINVAL;
1109                 }
1110         }
1111
1112         return 0;
1113 }
1114
1115 /******************************************************************************
1116  *
1117  *  ioctl_reqbufs
1118  *
1119  *  V4L2 Initiate memory mapping.
1120  *  NOTE: The user's request is ignored. For now the buffers are fixed.
1121  *
1122  *****************************************************************************/
1123
1124 static int ioctl_reqbufs(void *arg,struct camera_data *cam)
1125 {
1126         struct v4l2_requestbuffers *req = arg;
1127
1128         if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1129            req->memory != V4L2_MEMORY_MMAP)
1130                 return -EINVAL;
1131
1132         DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames);
1133         req->count = cam->num_frames;
1134         memset(&req->reserved, 0, sizeof(req->reserved));
1135
1136         return 0;
1137 }
1138
1139 /******************************************************************************
1140  *
1141  *  ioctl_querybuf
1142  *
1143  *  V4L2 Query memory buffer status.
1144  *
1145  *****************************************************************************/
1146
1147 static int ioctl_querybuf(void *arg,struct camera_data *cam)
1148 {
1149         struct v4l2_buffer *buf = arg;
1150
1151         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1152            buf->index > cam->num_frames)
1153                 return -EINVAL;
1154
1155         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1156         buf->length = cam->frame_size;
1157
1158         buf->memory = V4L2_MEMORY_MMAP;
1159
1160         if(cam->mmapped)
1161                 buf->flags = V4L2_BUF_FLAG_MAPPED;
1162         else
1163                 buf->flags = 0;
1164
1165         switch (cam->buffers[buf->index].status) {
1166         case FRAME_EMPTY:
1167         case FRAME_ERROR:
1168         case FRAME_READING:
1169                 buf->bytesused = 0;
1170                 buf->flags = V4L2_BUF_FLAG_QUEUED;
1171                 break;
1172         case FRAME_READY:
1173                 buf->bytesused = cam->buffers[buf->index].length;
1174                 buf->timestamp = cam->buffers[buf->index].timestamp;
1175                 buf->sequence = cam->buffers[buf->index].seq;
1176                 buf->flags = V4L2_BUF_FLAG_DONE;
1177                 break;
1178         }
1179
1180         DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n",
1181              buf->index, buf->m.offset, buf->flags, buf->sequence,
1182              buf->bytesused);
1183
1184         return 0;
1185 }
1186
1187 /******************************************************************************
1188  *
1189  *  ioctl_qbuf
1190  *
1191  *  V4L2 User is freeing buffer
1192  *
1193  *****************************************************************************/
1194
1195 static int ioctl_qbuf(void *arg,struct camera_data *cam)
1196 {
1197         struct v4l2_buffer *buf = arg;
1198
1199         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1200            buf->memory != V4L2_MEMORY_MMAP ||
1201            buf->index > cam->num_frames)
1202                 return -EINVAL;
1203
1204         DBG("QBUF #%d\n", buf->index);
1205
1206         if(cam->buffers[buf->index].status == FRAME_READY)
1207                 cam->buffers[buf->index].status = FRAME_EMPTY;
1208
1209         return 0;
1210 }
1211
1212 /******************************************************************************
1213  *
1214  *  find_earliest_filled_buffer
1215  *
1216  *  Helper for ioctl_dqbuf. Find the next ready buffer.
1217  *
1218  *****************************************************************************/
1219
1220 static int find_earliest_filled_buffer(struct camera_data *cam)
1221 {
1222         int i;
1223         int found = -1;
1224         for (i=0; i<cam->num_frames; i++) {
1225                 if(cam->buffers[i].status == FRAME_READY) {
1226                         if(found < 0) {
1227                                 found = i;
1228                         } else {
1229                                 /* find which buffer is earlier */
1230                                 struct timeval *tv1, *tv2;
1231                                 tv1 = &cam->buffers[i].timestamp;
1232                                 tv2 = &cam->buffers[found].timestamp;
1233                                 if(tv1->tv_sec < tv2->tv_sec ||
1234                                    (tv1->tv_sec == tv2->tv_sec &&
1235                                     tv1->tv_usec < tv2->tv_usec))
1236                                         found = i;
1237                         }
1238                 }
1239         }
1240         return found;
1241 }
1242
1243 /******************************************************************************
1244  *
1245  *  ioctl_dqbuf
1246  *
1247  *  V4L2 User is asking for a filled buffer.
1248  *
1249  *****************************************************************************/
1250
1251 static int ioctl_dqbuf(void *arg,struct camera_data *cam, struct file *file)
1252 {
1253         struct v4l2_buffer *buf = arg;
1254         int frame;
1255
1256         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1257            buf->memory != V4L2_MEMORY_MMAP)
1258                 return -EINVAL;
1259
1260         frame = find_earliest_filled_buffer(cam);
1261
1262         if(frame < 0 && file->f_flags&O_NONBLOCK)
1263                 return -EAGAIN;
1264
1265         if(frame < 0) {
1266                 /* Wait for a frame to become available */
1267                 struct framebuf *cb=cam->curbuff;
1268                 mutex_unlock(&cam->v4l2_lock);
1269                 wait_event_interruptible(cam->wq_stream,
1270                                          !cam->present ||
1271                                          (cb=cam->curbuff)->status == FRAME_READY);
1272                 mutex_lock(&cam->v4l2_lock);
1273                 if (signal_pending(current))
1274                         return -ERESTARTSYS;
1275                 if(!cam->present)
1276                         return -ENOTTY;
1277                 frame = cb->num;
1278         }
1279
1280
1281         buf->index = frame;
1282         buf->bytesused = cam->buffers[buf->index].length;
1283         buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE;
1284         buf->field = V4L2_FIELD_NONE;
1285         buf->timestamp = cam->buffers[buf->index].timestamp;
1286         buf->sequence = cam->buffers[buf->index].seq;
1287         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1288         buf->length = cam->frame_size;
1289         buf->input = 0;
1290         buf->reserved = 0;
1291         memset(&buf->timecode, 0, sizeof(buf->timecode));
1292
1293         DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index,
1294             cam->buffers[buf->index].status, buf->sequence, buf->bytesused);
1295
1296         return 0;
1297 }
1298
1299 /******************************************************************************
1300  *
1301  *  cpia2_ioctl
1302  *
1303  *****************************************************************************/
1304 static long cpia2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
1305 {
1306         struct camera_data *cam = video_drvdata(file);
1307         long retval = 0;
1308
1309         if (!cam)
1310                 return -ENOTTY;
1311
1312         if (!cam->present)
1313                 return -ENODEV;
1314
1315         /* Priority check */
1316         switch (cmd) {
1317         case VIDIOC_S_FMT:
1318         {
1319                 struct cpia2_fh *fh = file->private_data;
1320                 retval = v4l2_prio_check(&cam->prio, fh->prio);
1321                 if (retval)
1322                         return retval;
1323                 break;
1324         }
1325         default:
1326                 break;
1327         }
1328
1329         switch (cmd) {
1330         /* CPIA2 extension to Video4Linux API */
1331         case CPIA2_IOC_SET_GPIO:
1332                 retval = ioctl_set_gpio(arg, cam);
1333                 break;
1334         case VIDIOC_QUERYCAP:
1335                 retval = ioctl_querycap(arg,cam);
1336                 break;
1337
1338         case VIDIOC_ENUMINPUT:
1339         case VIDIOC_G_INPUT:
1340         case VIDIOC_S_INPUT:
1341                 retval = ioctl_input(cmd, arg, cam);
1342                 break;
1343
1344         case VIDIOC_ENUM_FMT:
1345                 retval = ioctl_enum_fmt(arg,cam);
1346                 break;
1347         case VIDIOC_TRY_FMT:
1348                 retval = ioctl_try_fmt(arg,cam);
1349                 break;
1350         case VIDIOC_G_FMT:
1351                 retval = ioctl_get_fmt(arg,cam);
1352                 break;
1353         case VIDIOC_S_FMT:
1354                 retval = ioctl_set_fmt(arg,cam,file->private_data);
1355                 break;
1356
1357         case VIDIOC_CROPCAP:
1358                 retval = ioctl_cropcap(arg,cam);
1359                 break;
1360         case VIDIOC_G_CROP:
1361         case VIDIOC_S_CROP:
1362                 // TODO: I think cropping can be implemented - SJB
1363                 retval = -EINVAL;
1364                 break;
1365
1366         case VIDIOC_QUERYCTRL:
1367                 retval = ioctl_queryctrl(arg,cam);
1368                 break;
1369         case VIDIOC_QUERYMENU:
1370                 retval = ioctl_querymenu(arg,cam);
1371                 break;
1372         case VIDIOC_G_CTRL:
1373                 retval = ioctl_g_ctrl(arg,cam);
1374                 break;
1375         case VIDIOC_S_CTRL:
1376                 retval = ioctl_s_ctrl(arg,cam);
1377                 break;
1378
1379         case VIDIOC_G_JPEGCOMP:
1380                 retval = ioctl_g_jpegcomp(arg,cam);
1381                 break;
1382         case VIDIOC_S_JPEGCOMP:
1383                 retval = ioctl_s_jpegcomp(arg,cam);
1384                 break;
1385
1386         case VIDIOC_G_PRIORITY:
1387         {
1388                 struct cpia2_fh *fh = file->private_data;
1389                 *(enum v4l2_priority*)arg = fh->prio;
1390                 break;
1391         }
1392         case VIDIOC_S_PRIORITY:
1393         {
1394                 struct cpia2_fh *fh = file->private_data;
1395                 enum v4l2_priority prio;
1396                 prio = *(enum v4l2_priority*)arg;
1397                 if(cam->streaming &&
1398                    prio != fh->prio &&
1399                    fh->prio == V4L2_PRIORITY_RECORD) {
1400                         /* Can't drop record priority while streaming */
1401                         retval = -EBUSY;
1402                 } else if(prio == V4L2_PRIORITY_RECORD &&
1403                    prio != fh->prio &&
1404                    v4l2_prio_max(&cam->prio) == V4L2_PRIORITY_RECORD) {
1405                         /* Only one program can record at a time */
1406                         retval = -EBUSY;
1407                 } else {
1408                         retval = v4l2_prio_change(&cam->prio, &fh->prio, prio);
1409                 }
1410                 break;
1411         }
1412
1413         case VIDIOC_REQBUFS:
1414                 retval = ioctl_reqbufs(arg,cam);
1415                 break;
1416         case VIDIOC_QUERYBUF:
1417                 retval = ioctl_querybuf(arg,cam);
1418                 break;
1419         case VIDIOC_QBUF:
1420                 retval = ioctl_qbuf(arg,cam);
1421                 break;
1422         case VIDIOC_DQBUF:
1423                 retval = ioctl_dqbuf(arg,cam,file);
1424                 break;
1425         case VIDIOC_STREAMON:
1426         {
1427                 int type;
1428                 DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming);
1429                 type = *(int*)arg;
1430                 if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1431                         retval = -EINVAL;
1432
1433                 if(!cam->streaming) {
1434                         retval = cpia2_usb_stream_start(cam,
1435                                           cam->params.camera_state.stream_mode);
1436                 } else {
1437                         retval = -EINVAL;
1438                 }
1439
1440                 break;
1441         }
1442         case VIDIOC_STREAMOFF:
1443         {
1444                 int type;
1445                 DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming);
1446                 type = *(int*)arg;
1447                 if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1448                         retval = -EINVAL;
1449
1450                 if(cam->streaming) {
1451                         retval = cpia2_usb_stream_stop(cam);
1452                 } else {
1453                         retval = -EINVAL;
1454                 }
1455
1456                 break;
1457         }
1458
1459         case VIDIOC_ENUMOUTPUT:
1460         case VIDIOC_G_OUTPUT:
1461         case VIDIOC_S_OUTPUT:
1462         case VIDIOC_G_MODULATOR:
1463         case VIDIOC_S_MODULATOR:
1464
1465         case VIDIOC_ENUMAUDIO:
1466         case VIDIOC_G_AUDIO:
1467         case VIDIOC_S_AUDIO:
1468
1469         case VIDIOC_ENUMAUDOUT:
1470         case VIDIOC_G_AUDOUT:
1471         case VIDIOC_S_AUDOUT:
1472
1473         case VIDIOC_ENUMSTD:
1474         case VIDIOC_QUERYSTD:
1475         case VIDIOC_G_STD:
1476         case VIDIOC_S_STD:
1477
1478         case VIDIOC_G_TUNER:
1479         case VIDIOC_S_TUNER:
1480         case VIDIOC_G_FREQUENCY:
1481         case VIDIOC_S_FREQUENCY:
1482
1483         case VIDIOC_OVERLAY:
1484         case VIDIOC_G_FBUF:
1485         case VIDIOC_S_FBUF:
1486
1487         case VIDIOC_G_PARM:
1488         case VIDIOC_S_PARM:
1489                 retval = -EINVAL;
1490                 break;
1491         default:
1492                 retval = -ENOIOCTLCMD;
1493                 break;
1494         }
1495
1496         return retval;
1497 }
1498
1499 static long cpia2_ioctl(struct file *file,
1500                        unsigned int cmd, unsigned long arg)
1501 {
1502         return video_usercopy(file, cmd, arg, cpia2_do_ioctl);
1503 }
1504
1505 /******************************************************************************
1506  *
1507  *  cpia2_mmap
1508  *
1509  *****************************************************************************/
1510 static int cpia2_mmap(struct file *file, struct vm_area_struct *area)
1511 {
1512         struct camera_data *cam = video_drvdata(file);
1513         int retval;
1514
1515         /* Priority check */
1516         struct cpia2_fh *fh = file->private_data;
1517         if(fh->prio != V4L2_PRIORITY_RECORD) {
1518                 return -EBUSY;
1519         }
1520
1521         retval = cpia2_remap_buffer(cam, area);
1522
1523         if(!retval)
1524                 fh->mmapped = 1;
1525         return retval;
1526 }
1527
1528 /******************************************************************************
1529  *
1530  *  reset_camera_struct_v4l
1531  *
1532  *  Sets all values to the defaults
1533  *****************************************************************************/
1534 static void reset_camera_struct_v4l(struct camera_data *cam)
1535 {
1536         cam->width = cam->params.roi.width;
1537         cam->height = cam->params.roi.height;
1538
1539         cam->frame_size = buffer_size;
1540         cam->num_frames = num_buffers;
1541
1542         /* FlickerModes */
1543         cam->params.flicker_control.flicker_mode_req = flicker_mode;
1544         cam->params.flicker_control.mains_frequency = flicker_freq;
1545
1546         /* streamMode */
1547         cam->params.camera_state.stream_mode = alternate;
1548
1549         cam->pixelformat = V4L2_PIX_FMT_JPEG;
1550         v4l2_prio_init(&cam->prio);
1551 }
1552
1553 /***
1554  * The v4l video device structure initialized for this device
1555  ***/
1556 static const struct v4l2_file_operations cpia2_fops = {
1557         .owner          = THIS_MODULE,
1558         .open           = cpia2_open,
1559         .release        = cpia2_close,
1560         .read           = cpia2_v4l_read,
1561         .poll           = cpia2_v4l_poll,
1562         .unlocked_ioctl = cpia2_ioctl,
1563         .mmap           = cpia2_mmap,
1564 };
1565
1566 static struct video_device cpia2_template = {
1567         /* I could not find any place for the old .initialize initializer?? */
1568         .name =         "CPiA2 Camera",
1569         .fops =         &cpia2_fops,
1570         .release =      video_device_release,
1571 };
1572
1573 /******************************************************************************
1574  *
1575  *  cpia2_register_camera
1576  *
1577  *****************************************************************************/
1578 int cpia2_register_camera(struct camera_data *cam)
1579 {
1580         cam->vdev = video_device_alloc();
1581         if(!cam->vdev)
1582                 return -ENOMEM;
1583
1584         memcpy(cam->vdev, &cpia2_template, sizeof(cpia2_template));
1585         video_set_drvdata(cam->vdev, cam);
1586         cam->vdev->lock = &cam->v4l2_lock;
1587
1588         reset_camera_struct_v4l(cam);
1589
1590         /* register v4l device */
1591         if (video_register_device(cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
1592                 ERR("video_register_device failed\n");
1593                 video_device_release(cam->vdev);
1594                 return -ENODEV;
1595         }
1596
1597         return 0;
1598 }
1599
1600 /******************************************************************************
1601  *
1602  *  cpia2_unregister_camera
1603  *
1604  *****************************************************************************/
1605 void cpia2_unregister_camera(struct camera_data *cam)
1606 {
1607         if (!cam->open_count) {
1608                 video_unregister_device(cam->vdev);
1609         } else {
1610                 LOG("%s removed while open, deferring "
1611                     "video_unregister_device\n",
1612                     video_device_node_name(cam->vdev));
1613         }
1614 }
1615
1616 /******************************************************************************
1617  *
1618  *  check_parameters
1619  *
1620  *  Make sure that all user-supplied parameters are sensible
1621  *****************************************************************************/
1622 static void __init check_parameters(void)
1623 {
1624         if(buffer_size < PAGE_SIZE) {
1625                 buffer_size = PAGE_SIZE;
1626                 LOG("buffer_size too small, setting to %d\n", buffer_size);
1627         } else if(buffer_size > 1024*1024) {
1628                 /* arbitrary upper limiit */
1629                 buffer_size = 1024*1024;
1630                 LOG("buffer_size ridiculously large, setting to %d\n",
1631                     buffer_size);
1632         } else {
1633                 buffer_size += PAGE_SIZE-1;
1634                 buffer_size &= ~(PAGE_SIZE-1);
1635         }
1636
1637         if(num_buffers < 1) {
1638                 num_buffers = 1;
1639                 LOG("num_buffers too small, setting to %d\n", num_buffers);
1640         } else if(num_buffers > VIDEO_MAX_FRAME) {
1641                 num_buffers = VIDEO_MAX_FRAME;
1642                 LOG("num_buffers too large, setting to %d\n", num_buffers);
1643         }
1644
1645         if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) {
1646                 alternate = DEFAULT_ALT;
1647                 LOG("alternate specified is invalid, using %d\n", alternate);
1648         }
1649
1650         if (flicker_mode != NEVER_FLICKER && flicker_mode != ANTI_FLICKER_ON) {
1651                 flicker_mode = NEVER_FLICKER;
1652                 LOG("Flicker mode specified is invalid, using %d\n",
1653                     flicker_mode);
1654         }
1655
1656         if (flicker_freq != FLICKER_50 && flicker_freq != FLICKER_60) {
1657                 flicker_freq = FLICKER_60;
1658                 LOG("Flicker mode specified is invalid, using %d\n",
1659                     flicker_freq);
1660         }
1661
1662         if(video_nr < -1 || video_nr > 64) {
1663                 video_nr = -1;
1664                 LOG("invalid video_nr specified, must be -1 to 64\n");
1665         }
1666
1667         DBG("Using %d buffers, each %d bytes, alternate=%d\n",
1668             num_buffers, buffer_size, alternate);
1669 }
1670
1671 /************   Module Stuff ***************/
1672
1673
1674 /******************************************************************************
1675  *
1676  * cpia2_init/module_init
1677  *
1678  *****************************************************************************/
1679 static int __init cpia2_init(void)
1680 {
1681         LOG("%s v%d.%d.%d\n",
1682             ABOUT, CPIA2_MAJ_VER, CPIA2_MIN_VER, CPIA2_PATCH_VER);
1683         check_parameters();
1684         cpia2_usb_init();
1685         return 0;
1686 }
1687
1688
1689 /******************************************************************************
1690  *
1691  * cpia2_exit/module_exit
1692  *
1693  *****************************************************************************/
1694 static void __exit cpia2_exit(void)
1695 {
1696         cpia2_usb_cleanup();
1697         schedule_timeout(2 * HZ);
1698 }
1699
1700 module_init(cpia2_init);
1701 module_exit(cpia2_exit);
1702