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 long cpia2_default(struct file *file, void *fh, bool valid_prio,
 399                           int cmd, void *arg)
 400 {
 401         struct camera_data *cam = video_drvdata(file);
 402         __u32 gpio_val;
 403
 404         if (cmd != CPIA2_CID_GPIO)
 405                 return -EINVAL;
 406
 407         gpio_val = *(__u32*) arg;
 408
 409         if (gpio_val &~ 0xFFU)
 410                 return -EINVAL;
 411
 412         return cpia2_set_gpio(cam, (unsigned char)gpio_val);
 413 }
 414
 415 /******************************************************************************
 416  *
 417  *  ioctl_querycap
 418  *
 419  *  V4L2 device capabilities
 420  *
 421  *****************************************************************************/
 422
 423 static int cpia2_querycap(struct file *file, void *fh, struct v4l2_capability *vc)
 424 {
 425         struct camera_data *cam = video_drvdata(file);
 426
 427         strcpy(vc->driver, "cpia2");
 428
 429         if (cam->params.pnp_id.product == 0x151)
 430                 strcpy(vc->card, "QX5 Microscope");
 431         else
 432                 strcpy(vc->card, "CPiA2 Camera");
 433         switch (cam->params.pnp_id.device_type) {
 434         case DEVICE_STV_672:
 435                 strcat(vc->card, " (672/");
 436                 break;
 437         case DEVICE_STV_676:
 438                 strcat(vc->card, " (676/");
 439                 break;
 440         default:
 441                 strcat(vc->card, " (XXX/");
 442                 break;
 443         }
 444         switch (cam->params.version.sensor_flags) {
 445         case CPIA2_VP_SENSOR_FLAGS_404:
 446                 strcat(vc->card, "404)");
 447                 break;
 448         case CPIA2_VP_SENSOR_FLAGS_407:
 449                 strcat(vc->card, "407)");
 450                 break;
 451         case CPIA2_VP_SENSOR_FLAGS_409:
 452                 strcat(vc->card, "409)");
 453                 break;
 454         case CPIA2_VP_SENSOR_FLAGS_410:
 455                 strcat(vc->card, "410)");
 456                 break;
 457         case CPIA2_VP_SENSOR_FLAGS_500:
 458                 strcat(vc->card, "500)");
 459                 break;
 460         default:
 461                 strcat(vc->card, "XXX)");
 462                 break;
 463         }
 464
 465         if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0)
 466                 memset(vc->bus_info,0, sizeof(vc->bus_info));
 467
 468         vc->version = KERNEL_VERSION(CPIA2_MAJ_VER, CPIA2_MIN_VER,
 469                                      CPIA2_PATCH_VER);
 470
 471         vc->capabilities = V4L2_CAP_VIDEO_CAPTURE |
 472                            V4L2_CAP_READWRITE |
 473                            V4L2_CAP_STREAMING;
 474
 475         return 0;
 476 }
 477
 478 /******************************************************************************
 479  *
 480  *  ioctl_input
 481  *
 482  *  V4L2 input get/set/enumerate
 483  *
 484  *****************************************************************************/
 485
 486 static int cpia2_enum_input(struct file *file, void *fh, struct v4l2_input *i)
 487 {
 488         if (i->index)
 489                 return -EINVAL;
 490         strcpy(i->name, "Camera");
 491         i->type = V4L2_INPUT_TYPE_CAMERA;
 492         return 0;
 493 }
 494
 495 static int cpia2_g_input(struct file *file, void *fh, unsigned int *i)
 496 {
 497         *i = 0;
 498         return 0;
 499 }
 500
 501 static int cpia2_s_input(struct file *file, void *fh, unsigned int i)
 502 {
 503         return i ? -EINVAL : 0;
 504 }
 505
 506 /******************************************************************************
 507  *
 508  *  ioctl_enum_fmt
 509  *
 510  *  V4L2 format enumerate
 511  *
 512  *****************************************************************************/
 513
 514 static int cpia2_enum_fmt_vid_cap(struct file *file, void *fh,
 515                                             struct v4l2_fmtdesc *f)
 516 {
 517         int index = f->index;
 518
 519         if (index < 0 || index > 1)
 520                return -EINVAL;
 521
 522         memset(f, 0, sizeof(*f));
 523         f->index = index;
 524         f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 525         f->flags = V4L2_FMT_FLAG_COMPRESSED;
 526         switch(index) {
 527         case 0:
 528                 strcpy(f->description, "MJPEG");
 529                 f->pixelformat = V4L2_PIX_FMT_MJPEG;
 530                 break;
 531         case 1:
 532                 strcpy(f->description, "JPEG");
 533                 f->pixelformat = V4L2_PIX_FMT_JPEG;
 534                 break;
 535         default:
 536                 return -EINVAL;
 537         }
 538
 539         return 0;
 540 }
 541
 542 /******************************************************************************
 543  *
 544  *  ioctl_try_fmt
 545  *
 546  *  V4L2 format try
 547  *
 548  *****************************************************************************/
 549
 550 static int cpia2_try_fmt_vid_cap(struct file *file, void *fh,
 551                                           struct v4l2_format *f)
 552 {
 553         struct camera_data *cam = video_drvdata(file);
 554
 555         if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG &&
 556             f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
 557                return -EINVAL;
 558
 559         f->fmt.pix.field = V4L2_FIELD_NONE;
 560         f->fmt.pix.bytesperline = 0;
 561         f->fmt.pix.sizeimage = cam->frame_size;
 562         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 563         f->fmt.pix.priv = 0;
 564
 565         switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
 566         case VIDEOSIZE_VGA:
 567                 f->fmt.pix.width = 640;
 568                 f->fmt.pix.height = 480;
 569                 break;
 570         case VIDEOSIZE_CIF:
 571                 f->fmt.pix.width = 352;
 572                 f->fmt.pix.height = 288;
 573                 break;
 574         case VIDEOSIZE_QVGA:
 575                 f->fmt.pix.width = 320;
 576                 f->fmt.pix.height = 240;
 577                 break;
 578         case VIDEOSIZE_288_216:
 579                 f->fmt.pix.width = 288;
 580                 f->fmt.pix.height = 216;
 581                 break;
 582         case VIDEOSIZE_256_192:
 583                 f->fmt.pix.width = 256;
 584                 f->fmt.pix.height = 192;
 585                 break;
 586         case VIDEOSIZE_224_168:
 587                 f->fmt.pix.width = 224;
 588                 f->fmt.pix.height = 168;
 589                 break;
 590         case VIDEOSIZE_192_144:
 591                 f->fmt.pix.width = 192;
 592                 f->fmt.pix.height = 144;
 593                 break;
 594         case VIDEOSIZE_QCIF:
 595         default:
 596                 f->fmt.pix.width = 176;
 597                 f->fmt.pix.height = 144;
 598                 break;
 599         }
 600
 601         return 0;
 602 }
 603
 604 /******************************************************************************
 605  *
 606  *  ioctl_set_fmt
 607  *
 608  *  V4L2 format set
 609  *
 610  *****************************************************************************/
 611
 612 static int cpia2_s_fmt_vid_cap(struct file *file, void *_fh,
 613                                         struct v4l2_format *f)
 614 {
 615         struct camera_data *cam = video_drvdata(file);
 616         struct cpia2_fh *fh = _fh;
 617         int err, frame;
 618
 619         err = v4l2_prio_check(&cam->prio, fh->prio);
 620         if (err)
 621                 return err;
 622         err = cpia2_try_fmt_vid_cap(file, _fh, f);
 623         if(err != 0)
 624                 return err;
 625
 626         /* Ensure that only this process can change the format. */
 627         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
 628         if(err != 0) {
 629                 return err;
 630         }
 631
 632         cam->pixelformat = f->fmt.pix.pixelformat;
 633
 634         /* NOTE: This should be set to 1 for MJPEG, but some apps don't handle
 635          * the missing Huffman table properly. */
 636         cam->params.compression.inhibit_htables = 0;
 637                 /*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/
 638
 639         /* we set the video window to something smaller or equal to what
 640          * is requested by the user???
 641          */
 642         DBG("Requested width = %d, height = %d\n",
 643             f->fmt.pix.width, f->fmt.pix.height);
 644         if (f->fmt.pix.width != cam->width ||
 645             f->fmt.pix.height != cam->height) {
 646                 cam->width = f->fmt.pix.width;
 647                 cam->height = f->fmt.pix.height;
 648                 cam->params.roi.width = f->fmt.pix.width;
 649                 cam->params.roi.height = f->fmt.pix.height;
 650                 cpia2_set_format(cam);
 651         }
 652
 653         for (frame = 0; frame < cam->num_frames; ++frame) {
 654                 if (cam->buffers[frame].status == FRAME_READING)
 655                         if ((err = sync(cam, frame)) < 0)
 656                                 return err;
 657
 658                 cam->buffers[frame].status = FRAME_EMPTY;
 659         }
 660
 661         return 0;
 662 }
 663
 664 /******************************************************************************
 665  *
 666  *  ioctl_get_fmt
 667  *
 668  *  V4L2 format get
 669  *
 670  *****************************************************************************/
 671
 672 static int cpia2_g_fmt_vid_cap(struct file *file, void *fh,
 673                                         struct v4l2_format *f)
 674 {
 675         struct camera_data *cam = video_drvdata(file);
 676
 677         f->fmt.pix.width = cam->width;
 678         f->fmt.pix.height = cam->height;
 679         f->fmt.pix.pixelformat = cam->pixelformat;
 680         f->fmt.pix.field = V4L2_FIELD_NONE;
 681         f->fmt.pix.bytesperline = 0;
 682         f->fmt.pix.sizeimage = cam->frame_size;
 683         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 684         f->fmt.pix.priv = 0;
 685
 686         return 0;
 687 }
 688
 689 /******************************************************************************
 690  *
 691  *  ioctl_cropcap
 692  *
 693  *  V4L2 query cropping capabilities
 694  *  NOTE: cropping is currently disabled
 695  *
 696  *****************************************************************************/
 697
 698 static int cpia2_cropcap(struct file *file, void *fh, struct v4l2_cropcap *c)
 699 {
 700         struct camera_data *cam = video_drvdata(file);
 701
 702         if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 703                return -EINVAL;
 704
 705         c->bounds.left = 0;
 706         c->bounds.top = 0;
 707         c->bounds.width = cam->width;
 708         c->bounds.height = cam->height;
 709         c->defrect.left = 0;
 710         c->defrect.top = 0;
 711         c->defrect.width = cam->width;
 712         c->defrect.height = cam->height;
 713         c->pixelaspect.numerator = 1;
 714         c->pixelaspect.denominator = 1;
 715
 716         return 0;
 717 }
 718
 719 /******************************************************************************
 720  *
 721  *  ioctl_queryctrl
 722  *
 723  *  V4L2 query possible control variables
 724  *
 725  *****************************************************************************/
 726
 727 static int cpia2_queryctrl(struct file *file, void *fh, struct v4l2_queryctrl *c)
 728 {
 729         struct camera_data *cam = video_drvdata(file);
 730         int i;
 731
 732         for(i=0; i<NUM_CONTROLS; ++i) {
 733                 if(c->id == controls[i].id) {
 734                         memcpy(c, controls+i, sizeof(*c));
 735                         break;
 736                 }
 737         }
 738
 739         if(i == NUM_CONTROLS)
 740                 return -EINVAL;
 741
 742         /* Some devices have additional limitations */
 743         switch(c->id) {
 744         case V4L2_CID_BRIGHTNESS:
 745                 /***
 746                  * Don't let the register be set to zero - bug in VP4
 747                  * flash of full brightness
 748                  ***/
 749                 if (cam->params.pnp_id.device_type == DEVICE_STV_672)
 750                         c->minimum = 1;
 751                 break;
 752         case V4L2_CID_VFLIP:
 753                 // VP5 Only
 754                 if(cam->params.pnp_id.device_type == DEVICE_STV_672)
 755                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
 756                 break;
 757         case CPIA2_CID_FRAMERATE:
 758                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
 759                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
 760                         // Maximum 15fps
 761                         for(i=0; i<c->maximum; ++i) {
 762                                 if(framerate_controls[i].value ==
 763                                    CPIA2_VP_FRAMERATE_15) {
 764                                         c->maximum = i;
 765                                         c->default_value = i;
 766                                 }
 767                         }
 768                 }
 769                 break;
 770         case CPIA2_CID_FLICKER_MODE:
 771                 // Flicker control only valid for 672.
 772                 if(cam->params.pnp_id.device_type != DEVICE_STV_672)
 773                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
 774                 break;
 775         case CPIA2_CID_LIGHTS:
 776                 // Light control only valid for the QX5 Microscope.
 777                 if(cam->params.pnp_id.product != 0x151)
 778                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
 779                 break;
 780         default:
 781                 break;
 782         }
 783
 784         return 0;
 785 }
 786
 787 /******************************************************************************
 788  *
 789  *  ioctl_querymenu
 790  *
 791  *  V4L2 query possible control variables
 792  *
 793  *****************************************************************************/
 794
 795 static int cpia2_querymenu(struct file *file, void *fh, struct v4l2_querymenu *m)
 796 {
 797         struct camera_data *cam = video_drvdata(file);
 798
 799         switch(m->id) {
 800         case CPIA2_CID_FLICKER_MODE:
 801                 if (m->index >= NUM_FLICKER_CONTROLS)
 802                         return -EINVAL;
 803
 804                 strcpy(m->name, flicker_controls[m->index].name);
 805                 break;
 806         case CPIA2_CID_FRAMERATE:
 807             {
 808                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
 809                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
 810                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
 811                         // Maximum 15fps
 812                         int i;
 813                         for(i=0; i<maximum; ++i) {
 814                                 if(framerate_controls[i].value ==
 815                                    CPIA2_VP_FRAMERATE_15)
 816                                         maximum = i;
 817                         }
 818                 }
 819                 if (m->index > maximum)
 820                         return -EINVAL;
 821
 822                 strcpy(m->name, framerate_controls[m->index].name);
 823                 break;
 824             }
 825         case CPIA2_CID_LIGHTS:
 826                 if (m->index >= NUM_LIGHTS_CONTROLS)
 827                         return -EINVAL;
 828
 829                 strcpy(m->name, lights_controls[m->index].name);
 830                 break;
 831         default:
 832                 return -EINVAL;
 833         }
 834
 835         return 0;
 836 }
 837
 838 /******************************************************************************
 839  *
 840  *  ioctl_g_ctrl
 841  *
 842  *  V4L2 get the value of a control variable
 843  *
 844  *****************************************************************************/
 845
 846 static int cpia2_g_ctrl(struct file *file, void *fh, struct v4l2_control *c)
 847 {
 848         struct camera_data *cam = video_drvdata(file);
 849
 850         switch(c->id) {
 851         case V4L2_CID_BRIGHTNESS:
 852                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_BRIGHTNESS,
 853                                  TRANSFER_READ, 0);
 854                 c->value = cam->params.color_params.brightness;
 855                 break;
 856         case V4L2_CID_CONTRAST:
 857                 cpia2_do_command(cam, CPIA2_CMD_GET_CONTRAST,
 858                                  TRANSFER_READ, 0);
 859                 c->value = cam->params.color_params.contrast;
 860                 break;
 861         case V4L2_CID_SATURATION:
 862                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_SATURATION,
 863                                  TRANSFER_READ, 0);
 864                 c->value = cam->params.color_params.saturation;
 865                 break;
 866         case V4L2_CID_HFLIP:
 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_MIRROR) != 0;
 871                 break;
 872         case V4L2_CID_VFLIP:
 873                 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
 874                                  TRANSFER_READ, 0);
 875                 c->value = (cam->params.vp_params.user_effects &
 876                             CPIA2_VP_USER_EFFECTS_FLIP) != 0;
 877                 break;
 878         case CPIA2_CID_TARGET_KB:
 879                 c->value = cam->params.vc_params.target_kb;
 880                 break;
 881         case CPIA2_CID_GPIO:
 882                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
 883                                  TRANSFER_READ, 0);
 884                 c->value = cam->params.vp_params.gpio_data;
 885                 break;
 886         case CPIA2_CID_FLICKER_MODE:
 887         {
 888                 int i, mode;
 889                 cpia2_do_command(cam, CPIA2_CMD_GET_FLICKER_MODES,
 890                                  TRANSFER_READ, 0);
 891                 if(cam->params.flicker_control.cam_register &
 892                    CPIA2_VP_FLICKER_MODES_NEVER_FLICKER) {
 893                         mode = NEVER_FLICKER;
 894                 } else {
 895                     if(cam->params.flicker_control.cam_register &
 896                        CPIA2_VP_FLICKER_MODES_50HZ) {
 897                         mode = FLICKER_50;
 898                     } else {
 899                         mode = FLICKER_60;
 900                     }
 901                 }
 902                 for(i=0; i<NUM_FLICKER_CONTROLS; i++) {
 903                         if(flicker_controls[i].value == mode) {
 904                                 c->value = i;
 905                                 break;
 906                         }
 907                 }
 908                 if(i == NUM_FLICKER_CONTROLS)
 909                         return -EINVAL;
 910                 break;
 911         }
 912         case CPIA2_CID_FRAMERATE:
 913         {
 914                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
 915                 int i;
 916                 for(i=0; i<= maximum; i++) {
 917                         if(cam->params.vp_params.frame_rate ==
 918                            framerate_controls[i].value)
 919                                 break;
 920                 }
 921                 if(i > maximum)
 922                         return -EINVAL;
 923                 c->value = i;
 924                 break;
 925         }
 926         case CPIA2_CID_USB_ALT:
 927                 c->value = cam->params.camera_state.stream_mode;
 928                 break;
 929         case CPIA2_CID_LIGHTS:
 930         {
 931                 int i;
 932                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
 933                                  TRANSFER_READ, 0);
 934                 for(i=0; i<NUM_LIGHTS_CONTROLS; i++) {
 935                         if((cam->params.vp_params.gpio_data&GPIO_LIGHTS_MASK) ==
 936                            lights_controls[i].value) {
 937                                 break;
 938                         }
 939                 }
 940                 if(i == NUM_LIGHTS_CONTROLS)
 941                         return -EINVAL;
 942                 c->value = i;
 943                 break;
 944         }
 945         case CPIA2_CID_RESET_CAMERA:
 946                 return -EINVAL;
 947         default:
 948                 return -EINVAL;
 949         }
 950
 951         DBG("Get control id:%d, value:%d\n", c->id, c->value);
 952
 953         return 0;
 954 }
 955
 956 /******************************************************************************
 957  *
 958  *  ioctl_s_ctrl
 959  *
 960  *  V4L2 set the value of a control variable
 961  *
 962  *****************************************************************************/
 963
 964 static int cpia2_s_ctrl(struct file *file, void *fh, struct v4l2_control *c)
 965 {
 966         struct camera_data *cam = video_drvdata(file);
 967         int i;
 968         int retval = 0;
 969
 970         DBG("Set control id:%d, value:%d\n", c->id, c->value);
 971
 972         /* Check that the value is in range */
 973         for(i=0; i<NUM_CONTROLS; i++) {
 974                 if(c->id == controls[i].id) {
 975                         if(c->value < controls[i].minimum ||
 976                            c->value > controls[i].maximum) {
 977                                 return -EINVAL;
 978                         }
 979                         break;
 980                 }
 981         }
 982         if(i == NUM_CONTROLS)
 983                 return -EINVAL;
 984
 985         switch(c->id) {
 986         case V4L2_CID_BRIGHTNESS:
 987                 cpia2_set_brightness(cam, c->value);
 988                 break;
 989         case V4L2_CID_CONTRAST:
 990                 cpia2_set_contrast(cam, c->value);
 991                 break;
 992         case V4L2_CID_SATURATION:
 993                 cpia2_set_saturation(cam, c->value);
 994                 break;
 995         case V4L2_CID_HFLIP:
 996                 cpia2_set_property_mirror(cam, c->value);
 997                 break;
 998         case V4L2_CID_VFLIP:
 999                 cpia2_set_property_flip(cam, c->value);
1000                 break;
1001         case CPIA2_CID_TARGET_KB:
1002                 retval = cpia2_set_target_kb(cam, c->value);
1003                 break;
1004         case CPIA2_CID_GPIO:
1005                 retval = cpia2_set_gpio(cam, c->value);
1006                 break;
1007         case CPIA2_CID_FLICKER_MODE:
1008                 retval = cpia2_set_flicker_mode(cam,
1009                                               flicker_controls[c->value].value);
1010                 break;
1011         case CPIA2_CID_FRAMERATE:
1012                 retval = cpia2_set_fps(cam, framerate_controls[c->value].value);
1013                 break;
1014         case CPIA2_CID_USB_ALT:
1015                 retval = cpia2_usb_change_streaming_alternate(cam, c->value);
1016                 break;
1017         case CPIA2_CID_LIGHTS:
1018                 retval = cpia2_set_gpio(cam, lights_controls[c->value].value);
1019                 break;
1020         case CPIA2_CID_RESET_CAMERA:
1021                 cpia2_usb_stream_pause(cam);
1022                 cpia2_reset_camera(cam);
1023                 cpia2_usb_stream_resume(cam);
1024                 break;
1025         default:
1026                 retval = -EINVAL;
1027         }
1028
1029         return retval;
1030 }
1031
1032 /******************************************************************************
1033  *
1034  *  ioctl_g_jpegcomp
1035  *
1036  *  V4L2 get the JPEG compression parameters
1037  *
1038  *****************************************************************************/
1039
1040 static int cpia2_g_jpegcomp(struct file *file, void *fh, struct v4l2_jpegcompression *parms)
1041 {
1042         struct camera_data *cam = video_drvdata(file);
1043
1044         memset(parms, 0, sizeof(*parms));
1045
1046         parms->quality = 80; // TODO: Can this be made meaningful?
1047
1048         parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI;
1049         if(!cam->params.compression.inhibit_htables) {
1050                 parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT;
1051         }
1052
1053         parms->APPn = cam->APPn;
1054         parms->APP_len = cam->APP_len;
1055         if(cam->APP_len > 0) {
1056                 memcpy(parms->APP_data, cam->APP_data, cam->APP_len);
1057                 parms->jpeg_markers |= V4L2_JPEG_MARKER_APP;
1058         }
1059
1060         parms->COM_len = cam->COM_len;
1061         if(cam->COM_len > 0) {
1062                 memcpy(parms->COM_data, cam->COM_data, cam->COM_len);
1063                 parms->jpeg_markers |= JPEG_MARKER_COM;
1064         }
1065
1066         DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n",
1067             parms->APP_len, parms->COM_len);
1068
1069         return 0;
1070 }
1071
1072 /******************************************************************************
1073  *
1074  *  ioctl_s_jpegcomp
1075  *
1076  *  V4L2 set the JPEG compression parameters
1077  *  NOTE: quality and some jpeg_markers are ignored.
1078  *
1079  *****************************************************************************/
1080
1081 static int cpia2_s_jpegcomp(struct file *file, void *fh, struct v4l2_jpegcompression *parms)
1082 {
1083         struct camera_data *cam = video_drvdata(file);
1084
1085         DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n",
1086             parms->APP_len, parms->COM_len);
1087
1088         cam->params.compression.inhibit_htables =
1089                 !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
1090
1091         if(parms->APP_len != 0) {
1092                 if(parms->APP_len > 0 &&
1093                    parms->APP_len <= sizeof(cam->APP_data) &&
1094                    parms->APPn >= 0 && parms->APPn <= 15) {
1095                         cam->APPn = parms->APPn;
1096                         cam->APP_len = parms->APP_len;
1097                         memcpy(cam->APP_data, parms->APP_data, parms->APP_len);
1098                 } else {
1099                         LOG("Bad APPn Params n=%d len=%d\n",
1100                             parms->APPn, parms->APP_len);
1101                         return -EINVAL;
1102                 }
1103         } else {
1104                 cam->APP_len = 0;
1105         }
1106
1107         if(parms->COM_len != 0) {
1108                 if(parms->COM_len > 0 &&
1109                    parms->COM_len <= sizeof(cam->COM_data)) {
1110                         cam->COM_len = parms->COM_len;
1111                         memcpy(cam->COM_data, parms->COM_data, parms->COM_len);
1112                 } else {
1113                         LOG("Bad COM_len=%d\n", parms->COM_len);
1114                         return -EINVAL;
1115                 }
1116         }
1117
1118         return 0;
1119 }
1120
1121 /******************************************************************************
1122  *
1123  *  ioctl_reqbufs
1124  *
1125  *  V4L2 Initiate memory mapping.
1126  *  NOTE: The user's request is ignored. For now the buffers are fixed.
1127  *
1128  *****************************************************************************/
1129
1130 static int cpia2_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *req)
1131 {
1132         struct camera_data *cam = video_drvdata(file);
1133
1134         if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1135            req->memory != V4L2_MEMORY_MMAP)
1136                 return -EINVAL;
1137
1138         DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames);
1139         req->count = cam->num_frames;
1140         memset(&req->reserved, 0, sizeof(req->reserved));
1141
1142         return 0;
1143 }
1144
1145 /******************************************************************************
1146  *
1147  *  ioctl_querybuf
1148  *
1149  *  V4L2 Query memory buffer status.
1150  *
1151  *****************************************************************************/
1152
1153 static int cpia2_querybuf(struct file *file, void *fh, struct v4l2_buffer *buf)
1154 {
1155         struct camera_data *cam = video_drvdata(file);
1156
1157         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1158            buf->index > cam->num_frames)
1159                 return -EINVAL;
1160
1161         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1162         buf->length = cam->frame_size;
1163
1164         buf->memory = V4L2_MEMORY_MMAP;
1165
1166         if(cam->mmapped)
1167                 buf->flags = V4L2_BUF_FLAG_MAPPED;
1168         else
1169                 buf->flags = 0;
1170
1171         switch (cam->buffers[buf->index].status) {
1172         case FRAME_EMPTY:
1173         case FRAME_ERROR:
1174         case FRAME_READING:
1175                 buf->bytesused = 0;
1176                 buf->flags = V4L2_BUF_FLAG_QUEUED;
1177                 break;
1178         case FRAME_READY:
1179                 buf->bytesused = cam->buffers[buf->index].length;
1180                 buf->timestamp = cam->buffers[buf->index].timestamp;
1181                 buf->sequence = cam->buffers[buf->index].seq;
1182                 buf->flags = V4L2_BUF_FLAG_DONE;
1183                 break;
1184         }
1185
1186         DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n",
1187              buf->index, buf->m.offset, buf->flags, buf->sequence,
1188              buf->bytesused);
1189
1190         return 0;
1191 }
1192
1193 /******************************************************************************
1194  *
1195  *  ioctl_qbuf
1196  *
1197  *  V4L2 User is freeing buffer
1198  *
1199  *****************************************************************************/
1200
1201 static int cpia2_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
1202 {
1203         struct camera_data *cam = video_drvdata(file);
1204
1205         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1206            buf->memory != V4L2_MEMORY_MMAP ||
1207            buf->index > cam->num_frames)
1208                 return -EINVAL;
1209
1210         DBG("QBUF #%d\n", buf->index);
1211
1212         if(cam->buffers[buf->index].status == FRAME_READY)
1213                 cam->buffers[buf->index].status = FRAME_EMPTY;
1214
1215         return 0;
1216 }
1217
1218 /******************************************************************************
1219  *
1220  *  find_earliest_filled_buffer
1221  *
1222  *  Helper for ioctl_dqbuf. Find the next ready buffer.
1223  *
1224  *****************************************************************************/
1225
1226 static int find_earliest_filled_buffer(struct camera_data *cam)
1227 {
1228         int i;
1229         int found = -1;
1230         for (i=0; i<cam->num_frames; i++) {
1231                 if(cam->buffers[i].status == FRAME_READY) {
1232                         if(found < 0) {
1233                                 found = i;
1234                         } else {
1235                                 /* find which buffer is earlier */
1236                                 struct timeval *tv1, *tv2;
1237                                 tv1 = &cam->buffers[i].timestamp;
1238                                 tv2 = &cam->buffers[found].timestamp;
1239                                 if(tv1->tv_sec < tv2->tv_sec ||
1240                                    (tv1->tv_sec == tv2->tv_sec &&
1241                                     tv1->tv_usec < tv2->tv_usec))
1242                                         found = i;
1243                         }
1244                 }
1245         }
1246         return found;
1247 }
1248
1249 /******************************************************************************
1250  *
1251  *  ioctl_dqbuf
1252  *
1253  *  V4L2 User is asking for a filled buffer.
1254  *
1255  *****************************************************************************/
1256
1257 static int cpia2_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
1258 {
1259         struct camera_data *cam = video_drvdata(file);
1260         int frame;
1261
1262         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1263            buf->memory != V4L2_MEMORY_MMAP)
1264                 return -EINVAL;
1265
1266         frame = find_earliest_filled_buffer(cam);
1267
1268         if(frame < 0 && file->f_flags&O_NONBLOCK)
1269                 return -EAGAIN;
1270
1271         if(frame < 0) {
1272                 /* Wait for a frame to become available */
1273                 struct framebuf *cb=cam->curbuff;
1274                 mutex_unlock(&cam->v4l2_lock);
1275                 wait_event_interruptible(cam->wq_stream,
1276                                          !cam->present ||
1277                                          (cb=cam->curbuff)->status == FRAME_READY);
1278                 mutex_lock(&cam->v4l2_lock);
1279                 if (signal_pending(current))
1280                         return -ERESTARTSYS;
1281                 if(!cam->present)
1282                         return -ENOTTY;
1283                 frame = cb->num;
1284         }
1285
1286
1287         buf->index = frame;
1288         buf->bytesused = cam->buffers[buf->index].length;
1289         buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE;
1290         buf->field = V4L2_FIELD_NONE;
1291         buf->timestamp = cam->buffers[buf->index].timestamp;
1292         buf->sequence = cam->buffers[buf->index].seq;
1293         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1294         buf->length = cam->frame_size;
1295         buf->input = 0;
1296         buf->reserved = 0;
1297         memset(&buf->timecode, 0, sizeof(buf->timecode));
1298
1299         DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index,
1300             cam->buffers[buf->index].status, buf->sequence, buf->bytesused);
1301
1302         return 0;
1303 }
1304
1305 static int cpia2_g_priority(struct file *file, void *_fh, enum v4l2_priority *p)
1306 {
1307         struct cpia2_fh *fh = _fh;
1308
1309         *p = fh->prio;
1310         return 0;
1311 }
1312
1313 static int cpia2_s_priority(struct file *file, void *_fh, enum v4l2_priority prio)
1314 {
1315         struct camera_data *cam = video_drvdata(file);
1316         struct cpia2_fh *fh = _fh;
1317
1318         if (cam->streaming && prio != fh->prio &&
1319                         fh->prio == V4L2_PRIORITY_RECORD)
1320                 /* Can't drop record priority while streaming */
1321                 return -EBUSY;
1322
1323         if (prio == V4L2_PRIORITY_RECORD && prio != fh->prio &&
1324                         v4l2_prio_max(&cam->prio) == V4L2_PRIORITY_RECORD)
1325                 /* Only one program can record at a time */
1326                 return -EBUSY;
1327         return v4l2_prio_change(&cam->prio, &fh->prio, prio);
1328 }
1329
1330 static int cpia2_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1331 {
1332         struct camera_data *cam = video_drvdata(file);
1333
1334         DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming);
1335         if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1336                 return -EINVAL;
1337
1338         if (!cam->streaming)
1339                 return cpia2_usb_stream_start(cam,
1340                                 cam->params.camera_state.stream_mode);
1341         return -EINVAL;
1342 }
1343
1344 static int cpia2_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
1345 {
1346         struct camera_data *cam = video_drvdata(file);
1347
1348         DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming);
1349         if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1350                 return -EINVAL;
1351
1352         if (cam->streaming)
1353                 return cpia2_usb_stream_stop(cam);
1354         return -EINVAL;
1355 }
1356
1357 /******************************************************************************
1358  *
1359  *  cpia2_mmap
1360  *
1361  *****************************************************************************/
1362 static int cpia2_mmap(struct file *file, struct vm_area_struct *area)
1363 {
1364         struct camera_data *cam = video_drvdata(file);
1365         int retval;
1366
1367         /* Priority check */
1368         struct cpia2_fh *fh = file->private_data;
1369         if(fh->prio != V4L2_PRIORITY_RECORD) {
1370                 return -EBUSY;
1371         }
1372
1373         retval = cpia2_remap_buffer(cam, area);
1374
1375         if(!retval)
1376                 fh->mmapped = 1;
1377         return retval;
1378 }
1379
1380 /******************************************************************************
1381  *
1382  *  reset_camera_struct_v4l
1383  *
1384  *  Sets all values to the defaults
1385  *****************************************************************************/
1386 static void reset_camera_struct_v4l(struct camera_data *cam)
1387 {
1388         cam->width = cam->params.roi.width;
1389         cam->height = cam->params.roi.height;
1390
1391         cam->frame_size = buffer_size;
1392         cam->num_frames = num_buffers;
1393
1394         /* FlickerModes */
1395         cam->params.flicker_control.flicker_mode_req = flicker_mode;
1396         cam->params.flicker_control.mains_frequency = flicker_freq;
1397
1398         /* streamMode */
1399         cam->params.camera_state.stream_mode = alternate;
1400
1401         cam->pixelformat = V4L2_PIX_FMT_JPEG;
1402         v4l2_prio_init(&cam->prio);
1403 }
1404
1405 static const struct v4l2_ioctl_ops cpia2_ioctl_ops = {
1406         .vidioc_querycap                    = cpia2_querycap,
1407         .vidioc_enum_input                  = cpia2_enum_input,
1408         .vidioc_g_input                     = cpia2_g_input,
1409         .vidioc_s_input                     = cpia2_s_input,
1410         .vidioc_enum_fmt_vid_cap            = cpia2_enum_fmt_vid_cap,
1411         .vidioc_g_fmt_vid_cap               = cpia2_g_fmt_vid_cap,
1412         .vidioc_s_fmt_vid_cap               = cpia2_s_fmt_vid_cap,
1413         .vidioc_try_fmt_vid_cap             = cpia2_try_fmt_vid_cap,
1414         .vidioc_queryctrl                   = cpia2_queryctrl,
1415         .vidioc_querymenu                   = cpia2_querymenu,
1416         .vidioc_g_ctrl                      = cpia2_g_ctrl,
1417         .vidioc_s_ctrl                      = cpia2_s_ctrl,
1418         .vidioc_g_jpegcomp                  = cpia2_g_jpegcomp,
1419         .vidioc_s_jpegcomp                  = cpia2_s_jpegcomp,
1420         .vidioc_cropcap                     = cpia2_cropcap,
1421         .vidioc_reqbufs                     = cpia2_reqbufs,
1422         .vidioc_querybuf                    = cpia2_querybuf,
1423         .vidioc_qbuf                        = cpia2_qbuf,
1424         .vidioc_dqbuf                       = cpia2_dqbuf,
1425         .vidioc_streamon                    = cpia2_streamon,
1426         .vidioc_streamoff                   = cpia2_streamoff,
1427         .vidioc_g_priority                  = cpia2_g_priority,
1428         .vidioc_s_priority                  = cpia2_s_priority,
1429         .vidioc_default                     = cpia2_default,
1430 };
1431
1432 /***
1433  * The v4l video device structure initialized for this device
1434  ***/
1435 static const struct v4l2_file_operations cpia2_fops = {
1436         .owner          = THIS_MODULE,
1437         .open           = cpia2_open,
1438         .release        = cpia2_close,
1439         .read           = cpia2_v4l_read,
1440         .poll           = cpia2_v4l_poll,
1441         .unlocked_ioctl = video_ioctl2,
1442         .mmap           = cpia2_mmap,
1443 };
1444
1445 static struct video_device cpia2_template = {
1446         /* I could not find any place for the old .initialize initializer?? */
1447         .name =         "CPiA2 Camera",
1448         .fops =         &cpia2_fops,
1449         .ioctl_ops =    &cpia2_ioctl_ops,
1450         .release =      video_device_release,
1451 };
1452
1453 /******************************************************************************
1454  *
1455  *  cpia2_register_camera
1456  *
1457  *****************************************************************************/
1458 int cpia2_register_camera(struct camera_data *cam)
1459 {
1460         cam->vdev = video_device_alloc();
1461         if(!cam->vdev)
1462                 return -ENOMEM;
1463
1464         memcpy(cam->vdev, &cpia2_template, sizeof(cpia2_template));
1465         video_set_drvdata(cam->vdev, cam);
1466         cam->vdev->lock = &cam->v4l2_lock;
1467
1468         reset_camera_struct_v4l(cam);
1469
1470         /* register v4l device */
1471         if (video_register_device(cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
1472                 ERR("video_register_device failed\n");
1473                 video_device_release(cam->vdev);
1474                 return -ENODEV;
1475         }
1476
1477         return 0;
1478 }
1479
1480 /******************************************************************************
1481  *
1482  *  cpia2_unregister_camera
1483  *
1484  *****************************************************************************/
1485 void cpia2_unregister_camera(struct camera_data *cam)
1486 {
1487         if (!cam->open_count) {
1488                 video_unregister_device(cam->vdev);
1489         } else {
1490                 LOG("%s removed while open, deferring "
1491                     "video_unregister_device\n",
1492                     video_device_node_name(cam->vdev));
1493         }
1494 }
1495
1496 /******************************************************************************
1497  *
1498  *  check_parameters
1499  *
1500  *  Make sure that all user-supplied parameters are sensible
1501  *****************************************************************************/
1502 static void __init check_parameters(void)
1503 {
1504         if(buffer_size < PAGE_SIZE) {
1505                 buffer_size = PAGE_SIZE;
1506                 LOG("buffer_size too small, setting to %d\n", buffer_size);
1507         } else if(buffer_size > 1024*1024) {
1508                 /* arbitrary upper limiit */
1509                 buffer_size = 1024*1024;
1510                 LOG("buffer_size ridiculously large, setting to %d\n",
1511                     buffer_size);
1512         } else {
1513                 buffer_size += PAGE_SIZE-1;
1514                 buffer_size &= ~(PAGE_SIZE-1);
1515         }
1516
1517         if(num_buffers < 1) {
1518                 num_buffers = 1;
1519                 LOG("num_buffers too small, setting to %d\n", num_buffers);
1520         } else if(num_buffers > VIDEO_MAX_FRAME) {
1521                 num_buffers = VIDEO_MAX_FRAME;
1522                 LOG("num_buffers too large, setting to %d\n", num_buffers);
1523         }
1524
1525         if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) {
1526                 alternate = DEFAULT_ALT;
1527                 LOG("alternate specified is invalid, using %d\n", alternate);
1528         }
1529
1530         if (flicker_mode != NEVER_FLICKER && flicker_mode != ANTI_FLICKER_ON) {
1531                 flicker_mode = NEVER_FLICKER;
1532                 LOG("Flicker mode specified is invalid, using %d\n",
1533                     flicker_mode);
1534         }
1535
1536         if (flicker_freq != FLICKER_50 && flicker_freq != FLICKER_60) {
1537                 flicker_freq = FLICKER_60;
1538                 LOG("Flicker mode specified is invalid, using %d\n",
1539                     flicker_freq);
1540         }
1541
1542         if(video_nr < -1 || video_nr > 64) {
1543                 video_nr = -1;
1544                 LOG("invalid video_nr specified, must be -1 to 64\n");
1545         }
1546
1547         DBG("Using %d buffers, each %d bytes, alternate=%d\n",
1548             num_buffers, buffer_size, alternate);
1549 }
1550
1551 /************   Module Stuff ***************/
1552
1553
1554 /******************************************************************************
1555  *
1556  * cpia2_init/module_init
1557  *
1558  *****************************************************************************/
1559 static int __init cpia2_init(void)
1560 {
1561         LOG("%s v%d.%d.%d\n",
1562             ABOUT, CPIA2_MAJ_VER, CPIA2_MIN_VER, CPIA2_PATCH_VER);
1563         check_parameters();
1564         cpia2_usb_init();
1565         return 0;
1566 }
1567
1568
1569 /******************************************************************************
1570  *
1571  * cpia2_exit/module_exit
1572  *
1573  *****************************************************************************/
1574 static void __exit cpia2_exit(void)
1575 {
1576         cpia2_usb_cleanup();
1577         schedule_timeout(2 * HZ);
1578 }
1579
1580 module_init(cpia2_init);
1581 module_exit(cpia2_exit);
1582