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 #define CPIA_VERSION "3.0.1"
  33
  34 #include <linux/module.h>
  35 #include <linux/time.h>
  36 #include <linux/sched.h>
  37 #include <linux/slab.h>
  38 #include <linux/init.h>
  39 #include <linux/videodev2.h>
  40 #include <linux/stringify.h>
  41 #include <media/v4l2-ioctl.h>
  42
  43 #include "cpia2.h"
  44 #include "cpia2dev.h"
  45
  46 static int video_nr = -1;
  47 module_param(video_nr, int, 0);
  48 MODULE_PARM_DESC(video_nr,"video device to register (0=/dev/video0, etc)");
  49
  50 static int buffer_size = 68*1024;
  51 module_param(buffer_size, int, 0);
  52 MODULE_PARM_DESC(buffer_size, "Size for each frame buffer in bytes (default 68k)");
  53
  54 static int num_buffers = 3;
  55 module_param(num_buffers, int, 0);
  56 MODULE_PARM_DESC(num_buffers, "Number of frame buffers (1-"
  57                  __stringify(VIDEO_MAX_FRAME) ", default 3)");
  58
  59 static int alternate = DEFAULT_ALT;
  60 module_param(alternate, int, 0);
  61 MODULE_PARM_DESC(alternate, "USB Alternate (" __stringify(USBIF_ISO_1) "-"
  62                  __stringify(USBIF_ISO_6) ", default "
  63                  __stringify(DEFAULT_ALT) ")");
  64
  65 static int flicker_freq = 60;
  66 module_param(flicker_freq, int, 0);
  67 MODULE_PARM_DESC(flicker_freq, "Flicker frequency (" __stringify(50) "or"
  68                  __stringify(60) ", default "
  69                  __stringify(60) ")");
  70
  71 static int flicker_mode = NEVER_FLICKER;
  72 module_param(flicker_mode, int, 0);
  73 MODULE_PARM_DESC(flicker_mode,
  74                  "Flicker supression (" __stringify(NEVER_FLICKER) "or"
  75                  __stringify(ANTI_FLICKER_ON) ", default "
  76                  __stringify(NEVER_FLICKER) ")");
  77
  78 MODULE_AUTHOR("Steve Miller (STMicroelectronics) <steve.miller@st.com>");
  79 MODULE_DESCRIPTION("V4L-driver for STMicroelectronics CPiA2 based cameras");
  80 MODULE_SUPPORTED_DEVICE("video");
  81 MODULE_LICENSE("GPL");
  82 MODULE_VERSION(CPIA_VERSION);
  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->capabilities = V4L2_CAP_VIDEO_CAPTURE |
 469                            V4L2_CAP_READWRITE |
 470                            V4L2_CAP_STREAMING;
 471
 472         return 0;
 473 }
 474
 475 /******************************************************************************
 476  *
 477  *  ioctl_input
 478  *
 479  *  V4L2 input get/set/enumerate
 480  *
 481  *****************************************************************************/
 482
 483 static int cpia2_enum_input(struct file *file, void *fh, struct v4l2_input *i)
 484 {
 485         if (i->index)
 486                 return -EINVAL;
 487         strcpy(i->name, "Camera");
 488         i->type = V4L2_INPUT_TYPE_CAMERA;
 489         return 0;
 490 }
 491
 492 static int cpia2_g_input(struct file *file, void *fh, unsigned int *i)
 493 {
 494         *i = 0;
 495         return 0;
 496 }
 497
 498 static int cpia2_s_input(struct file *file, void *fh, unsigned int i)
 499 {
 500         return i ? -EINVAL : 0;
 501 }
 502
 503 /******************************************************************************
 504  *
 505  *  ioctl_enum_fmt
 506  *
 507  *  V4L2 format enumerate
 508  *
 509  *****************************************************************************/
 510
 511 static int cpia2_enum_fmt_vid_cap(struct file *file, void *fh,
 512                                             struct v4l2_fmtdesc *f)
 513 {
 514         int index = f->index;
 515
 516         if (index < 0 || index > 1)
 517                return -EINVAL;
 518
 519         memset(f, 0, sizeof(*f));
 520         f->index = index;
 521         f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 522         f->flags = V4L2_FMT_FLAG_COMPRESSED;
 523         switch(index) {
 524         case 0:
 525                 strcpy(f->description, "MJPEG");
 526                 f->pixelformat = V4L2_PIX_FMT_MJPEG;
 527                 break;
 528         case 1:
 529                 strcpy(f->description, "JPEG");
 530                 f->pixelformat = V4L2_PIX_FMT_JPEG;
 531                 break;
 532         default:
 533                 return -EINVAL;
 534         }
 535
 536         return 0;
 537 }
 538
 539 /******************************************************************************
 540  *
 541  *  ioctl_try_fmt
 542  *
 543  *  V4L2 format try
 544  *
 545  *****************************************************************************/
 546
 547 static int cpia2_try_fmt_vid_cap(struct file *file, void *fh,
 548                                           struct v4l2_format *f)
 549 {
 550         struct camera_data *cam = video_drvdata(file);
 551
 552         if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG &&
 553             f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
 554                return -EINVAL;
 555
 556         f->fmt.pix.field = V4L2_FIELD_NONE;
 557         f->fmt.pix.bytesperline = 0;
 558         f->fmt.pix.sizeimage = cam->frame_size;
 559         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 560         f->fmt.pix.priv = 0;
 561
 562         switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
 563         case VIDEOSIZE_VGA:
 564                 f->fmt.pix.width = 640;
 565                 f->fmt.pix.height = 480;
 566                 break;
 567         case VIDEOSIZE_CIF:
 568                 f->fmt.pix.width = 352;
 569                 f->fmt.pix.height = 288;
 570                 break;
 571         case VIDEOSIZE_QVGA:
 572                 f->fmt.pix.width = 320;
 573                 f->fmt.pix.height = 240;
 574                 break;
 575         case VIDEOSIZE_288_216:
 576                 f->fmt.pix.width = 288;
 577                 f->fmt.pix.height = 216;
 578                 break;
 579         case VIDEOSIZE_256_192:
 580                 f->fmt.pix.width = 256;
 581                 f->fmt.pix.height = 192;
 582                 break;
 583         case VIDEOSIZE_224_168:
 584                 f->fmt.pix.width = 224;
 585                 f->fmt.pix.height = 168;
 586                 break;
 587         case VIDEOSIZE_192_144:
 588                 f->fmt.pix.width = 192;
 589                 f->fmt.pix.height = 144;
 590                 break;
 591         case VIDEOSIZE_QCIF:
 592         default:
 593                 f->fmt.pix.width = 176;
 594                 f->fmt.pix.height = 144;
 595                 break;
 596         }
 597
 598         return 0;
 599 }
 600
 601 /******************************************************************************
 602  *
 603  *  ioctl_set_fmt
 604  *
 605  *  V4L2 format set
 606  *
 607  *****************************************************************************/
 608
 609 static int cpia2_s_fmt_vid_cap(struct file *file, void *_fh,
 610                                         struct v4l2_format *f)
 611 {
 612         struct camera_data *cam = video_drvdata(file);
 613         struct cpia2_fh *fh = _fh;
 614         int err, frame;
 615
 616         err = v4l2_prio_check(&cam->prio, fh->prio);
 617         if (err)
 618                 return err;
 619         err = cpia2_try_fmt_vid_cap(file, _fh, f);
 620         if(err != 0)
 621                 return err;
 622
 623         /* Ensure that only this process can change the format. */
 624         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
 625         if(err != 0) {
 626                 return err;
 627         }
 628
 629         cam->pixelformat = f->fmt.pix.pixelformat;
 630
 631         /* NOTE: This should be set to 1 for MJPEG, but some apps don't handle
 632          * the missing Huffman table properly. */
 633         cam->params.compression.inhibit_htables = 0;
 634                 /*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/
 635
 636         /* we set the video window to something smaller or equal to what
 637          * is requested by the user???
 638          */
 639         DBG("Requested width = %d, height = %d\n",
 640             f->fmt.pix.width, f->fmt.pix.height);
 641         if (f->fmt.pix.width != cam->width ||
 642             f->fmt.pix.height != cam->height) {
 643                 cam->width = f->fmt.pix.width;
 644                 cam->height = f->fmt.pix.height;
 645                 cam->params.roi.width = f->fmt.pix.width;
 646                 cam->params.roi.height = f->fmt.pix.height;
 647                 cpia2_set_format(cam);
 648         }
 649
 650         for (frame = 0; frame < cam->num_frames; ++frame) {
 651                 if (cam->buffers[frame].status == FRAME_READING)
 652                         if ((err = sync(cam, frame)) < 0)
 653                                 return err;
 654
 655                 cam->buffers[frame].status = FRAME_EMPTY;
 656         }
 657
 658         return 0;
 659 }
 660
 661 /******************************************************************************
 662  *
 663  *  ioctl_get_fmt
 664  *
 665  *  V4L2 format get
 666  *
 667  *****************************************************************************/
 668
 669 static int cpia2_g_fmt_vid_cap(struct file *file, void *fh,
 670                                         struct v4l2_format *f)
 671 {
 672         struct camera_data *cam = video_drvdata(file);
 673
 674         f->fmt.pix.width = cam->width;
 675         f->fmt.pix.height = cam->height;
 676         f->fmt.pix.pixelformat = cam->pixelformat;
 677         f->fmt.pix.field = V4L2_FIELD_NONE;
 678         f->fmt.pix.bytesperline = 0;
 679         f->fmt.pix.sizeimage = cam->frame_size;
 680         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 681         f->fmt.pix.priv = 0;
 682
 683         return 0;
 684 }
 685
 686 /******************************************************************************
 687  *
 688  *  ioctl_cropcap
 689  *
 690  *  V4L2 query cropping capabilities
 691  *  NOTE: cropping is currently disabled
 692  *
 693  *****************************************************************************/
 694
 695 static int cpia2_cropcap(struct file *file, void *fh, struct v4l2_cropcap *c)
 696 {
 697         struct camera_data *cam = video_drvdata(file);
 698
 699         if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 700                return -EINVAL;
 701
 702         c->bounds.left = 0;
 703         c->bounds.top = 0;
 704         c->bounds.width = cam->width;
 705         c->bounds.height = cam->height;
 706         c->defrect.left = 0;
 707         c->defrect.top = 0;
 708         c->defrect.width = cam->width;
 709         c->defrect.height = cam->height;
 710         c->pixelaspect.numerator = 1;
 711         c->pixelaspect.denominator = 1;
 712
 713         return 0;
 714 }
 715
 716 /******************************************************************************
 717  *
 718  *  ioctl_queryctrl
 719  *
 720  *  V4L2 query possible control variables
 721  *
 722  *****************************************************************************/
 723
 724 static int cpia2_queryctrl(struct file *file, void *fh, struct v4l2_queryctrl *c)
 725 {
 726         struct camera_data *cam = video_drvdata(file);
 727         int i;
 728
 729         for(i=0; i<NUM_CONTROLS; ++i) {
 730                 if(c->id == controls[i].id) {
 731                         memcpy(c, controls+i, sizeof(*c));
 732                         break;
 733                 }
 734         }
 735
 736         if(i == NUM_CONTROLS)
 737                 return -EINVAL;
 738
 739         /* Some devices have additional limitations */
 740         switch(c->id) {
 741         case V4L2_CID_BRIGHTNESS:
 742                 /***
 743                  * Don't let the register be set to zero - bug in VP4
 744                  * flash of full brightness
 745                  ***/
 746                 if (cam->params.pnp_id.device_type == DEVICE_STV_672)
 747                         c->minimum = 1;
 748                 break;
 749         case V4L2_CID_VFLIP:
 750                 // VP5 Only
 751                 if(cam->params.pnp_id.device_type == DEVICE_STV_672)
 752                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
 753                 break;
 754         case CPIA2_CID_FRAMERATE:
 755                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
 756                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
 757                         // Maximum 15fps
 758                         for(i=0; i<c->maximum; ++i) {
 759                                 if(framerate_controls[i].value ==
 760                                    CPIA2_VP_FRAMERATE_15) {
 761                                         c->maximum = i;
 762                                         c->default_value = i;
 763                                 }
 764                         }
 765                 }
 766                 break;
 767         case CPIA2_CID_FLICKER_MODE:
 768                 // Flicker control only valid for 672.
 769                 if(cam->params.pnp_id.device_type != DEVICE_STV_672)
 770                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
 771                 break;
 772         case CPIA2_CID_LIGHTS:
 773                 // Light control only valid for the QX5 Microscope.
 774                 if(cam->params.pnp_id.product != 0x151)
 775                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
 776                 break;
 777         default:
 778                 break;
 779         }
 780
 781         return 0;
 782 }
 783
 784 /******************************************************************************
 785  *
 786  *  ioctl_querymenu
 787  *
 788  *  V4L2 query possible control variables
 789  *
 790  *****************************************************************************/
 791
 792 static int cpia2_querymenu(struct file *file, void *fh, struct v4l2_querymenu *m)
 793 {
 794         struct camera_data *cam = video_drvdata(file);
 795
 796         switch(m->id) {
 797         case CPIA2_CID_FLICKER_MODE:
 798                 if (m->index >= NUM_FLICKER_CONTROLS)
 799                         return -EINVAL;
 800
 801                 strcpy(m->name, flicker_controls[m->index].name);
 802                 break;
 803         case CPIA2_CID_FRAMERATE:
 804             {
 805                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
 806                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
 807                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
 808                         // Maximum 15fps
 809                         int i;
 810                         for(i=0; i<maximum; ++i) {
 811                                 if(framerate_controls[i].value ==
 812                                    CPIA2_VP_FRAMERATE_15)
 813                                         maximum = i;
 814                         }
 815                 }
 816                 if (m->index > maximum)
 817                         return -EINVAL;
 818
 819                 strcpy(m->name, framerate_controls[m->index].name);
 820                 break;
 821             }
 822         case CPIA2_CID_LIGHTS:
 823                 if (m->index >= NUM_LIGHTS_CONTROLS)
 824                         return -EINVAL;
 825
 826                 strcpy(m->name, lights_controls[m->index].name);
 827                 break;
 828         default:
 829                 return -EINVAL;
 830         }
 831
 832         return 0;
 833 }
 834
 835 /******************************************************************************
 836  *
 837  *  ioctl_g_ctrl
 838  *
 839  *  V4L2 get the value of a control variable
 840  *
 841  *****************************************************************************/
 842
 843 static int cpia2_g_ctrl(struct file *file, void *fh, struct v4l2_control *c)
 844 {
 845         struct camera_data *cam = video_drvdata(file);
 846
 847         switch(c->id) {
 848         case V4L2_CID_BRIGHTNESS:
 849                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_BRIGHTNESS,
 850                                  TRANSFER_READ, 0);
 851                 c->value = cam->params.color_params.brightness;
 852                 break;
 853         case V4L2_CID_CONTRAST:
 854                 cpia2_do_command(cam, CPIA2_CMD_GET_CONTRAST,
 855                                  TRANSFER_READ, 0);
 856                 c->value = cam->params.color_params.contrast;
 857                 break;
 858         case V4L2_CID_SATURATION:
 859                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_SATURATION,
 860                                  TRANSFER_READ, 0);
 861                 c->value = cam->params.color_params.saturation;
 862                 break;
 863         case V4L2_CID_HFLIP:
 864                 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
 865                                  TRANSFER_READ, 0);
 866                 c->value = (cam->params.vp_params.user_effects &
 867                             CPIA2_VP_USER_EFFECTS_MIRROR) != 0;
 868                 break;
 869         case V4L2_CID_VFLIP:
 870                 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
 871                                  TRANSFER_READ, 0);
 872                 c->value = (cam->params.vp_params.user_effects &
 873                             CPIA2_VP_USER_EFFECTS_FLIP) != 0;
 874                 break;
 875         case CPIA2_CID_TARGET_KB:
 876                 c->value = cam->params.vc_params.target_kb;
 877                 break;
 878         case CPIA2_CID_GPIO:
 879                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
 880                                  TRANSFER_READ, 0);
 881                 c->value = cam->params.vp_params.gpio_data;
 882                 break;
 883         case CPIA2_CID_FLICKER_MODE:
 884         {
 885                 int i, mode;
 886                 cpia2_do_command(cam, CPIA2_CMD_GET_FLICKER_MODES,
 887                                  TRANSFER_READ, 0);
 888                 if(cam->params.flicker_control.cam_register &
 889                    CPIA2_VP_FLICKER_MODES_NEVER_FLICKER) {
 890                         mode = NEVER_FLICKER;
 891                 } else {
 892                     if(cam->params.flicker_control.cam_register &
 893                        CPIA2_VP_FLICKER_MODES_50HZ) {
 894                         mode = FLICKER_50;
 895                     } else {
 896                         mode = FLICKER_60;
 897                     }
 898                 }
 899                 for(i=0; i<NUM_FLICKER_CONTROLS; i++) {
 900                         if(flicker_controls[i].value == mode) {
 901                                 c->value = i;
 902                                 break;
 903                         }
 904                 }
 905                 if(i == NUM_FLICKER_CONTROLS)
 906                         return -EINVAL;
 907                 break;
 908         }
 909         case CPIA2_CID_FRAMERATE:
 910         {
 911                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
 912                 int i;
 913                 for(i=0; i<= maximum; i++) {
 914                         if(cam->params.vp_params.frame_rate ==
 915                            framerate_controls[i].value)
 916                                 break;
 917                 }
 918                 if(i > maximum)
 919                         return -EINVAL;
 920                 c->value = i;
 921                 break;
 922         }
 923         case CPIA2_CID_USB_ALT:
 924                 c->value = cam->params.camera_state.stream_mode;
 925                 break;
 926         case CPIA2_CID_LIGHTS:
 927         {
 928                 int i;
 929                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
 930                                  TRANSFER_READ, 0);
 931                 for(i=0; i<NUM_LIGHTS_CONTROLS; i++) {
 932                         if((cam->params.vp_params.gpio_data&GPIO_LIGHTS_MASK) ==
 933                            lights_controls[i].value) {
 934                                 break;
 935                         }
 936                 }
 937                 if(i == NUM_LIGHTS_CONTROLS)
 938                         return -EINVAL;
 939                 c->value = i;
 940                 break;
 941         }
 942         case CPIA2_CID_RESET_CAMERA:
 943                 return -EINVAL;
 944         default:
 945                 return -EINVAL;
 946         }
 947
 948         DBG("Get control id:%d, value:%d\n", c->id, c->value);
 949
 950         return 0;
 951 }
 952
 953 /******************************************************************************
 954  *
 955  *  ioctl_s_ctrl
 956  *
 957  *  V4L2 set the value of a control variable
 958  *
 959  *****************************************************************************/
 960
 961 static int cpia2_s_ctrl(struct file *file, void *fh, struct v4l2_control *c)
 962 {
 963         struct camera_data *cam = video_drvdata(file);
 964         int i;
 965         int retval = 0;
 966
 967         DBG("Set control id:%d, value:%d\n", c->id, c->value);
 968
 969         /* Check that the value is in range */
 970         for(i=0; i<NUM_CONTROLS; i++) {
 971                 if(c->id == controls[i].id) {
 972                         if(c->value < controls[i].minimum ||
 973                            c->value > controls[i].maximum) {
 974                                 return -EINVAL;
 975                         }
 976                         break;
 977                 }
 978         }
 979         if(i == NUM_CONTROLS)
 980                 return -EINVAL;
 981
 982         switch(c->id) {
 983         case V4L2_CID_BRIGHTNESS:
 984                 cpia2_set_brightness(cam, c->value);
 985                 break;
 986         case V4L2_CID_CONTRAST:
 987                 cpia2_set_contrast(cam, c->value);
 988                 break;
 989         case V4L2_CID_SATURATION:
 990                 cpia2_set_saturation(cam, c->value);
 991                 break;
 992         case V4L2_CID_HFLIP:
 993                 cpia2_set_property_mirror(cam, c->value);
 994                 break;
 995         case V4L2_CID_VFLIP:
 996                 cpia2_set_property_flip(cam, c->value);
 997                 break;
 998         case CPIA2_CID_TARGET_KB:
 999                 retval = cpia2_set_target_kb(cam, c->value);
1000                 break;
1001         case CPIA2_CID_GPIO:
1002                 retval = cpia2_set_gpio(cam, c->value);
1003                 break;
1004         case CPIA2_CID_FLICKER_MODE:
1005                 retval = cpia2_set_flicker_mode(cam,
1006                                               flicker_controls[c->value].value);
1007                 break;
1008         case CPIA2_CID_FRAMERATE:
1009                 retval = cpia2_set_fps(cam, framerate_controls[c->value].value);
1010                 break;
1011         case CPIA2_CID_USB_ALT:
1012                 retval = cpia2_usb_change_streaming_alternate(cam, c->value);
1013                 break;
1014         case CPIA2_CID_LIGHTS:
1015                 retval = cpia2_set_gpio(cam, lights_controls[c->value].value);
1016                 break;
1017         case CPIA2_CID_RESET_CAMERA:
1018                 cpia2_usb_stream_pause(cam);
1019                 cpia2_reset_camera(cam);
1020                 cpia2_usb_stream_resume(cam);
1021                 break;
1022         default:
1023                 retval = -EINVAL;
1024         }
1025
1026         return retval;
1027 }
1028
1029 /******************************************************************************
1030  *
1031  *  ioctl_g_jpegcomp
1032  *
1033  *  V4L2 get the JPEG compression parameters
1034  *
1035  *****************************************************************************/
1036
1037 static int cpia2_g_jpegcomp(struct file *file, void *fh, struct v4l2_jpegcompression *parms)
1038 {
1039         struct camera_data *cam = video_drvdata(file);
1040
1041         memset(parms, 0, sizeof(*parms));
1042
1043         parms->quality = 80; // TODO: Can this be made meaningful?
1044
1045         parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI;
1046         if(!cam->params.compression.inhibit_htables) {
1047                 parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT;
1048         }
1049
1050         parms->APPn = cam->APPn;
1051         parms->APP_len = cam->APP_len;
1052         if(cam->APP_len > 0) {
1053                 memcpy(parms->APP_data, cam->APP_data, cam->APP_len);
1054                 parms->jpeg_markers |= V4L2_JPEG_MARKER_APP;
1055         }
1056
1057         parms->COM_len = cam->COM_len;
1058         if(cam->COM_len > 0) {
1059                 memcpy(parms->COM_data, cam->COM_data, cam->COM_len);
1060                 parms->jpeg_markers |= JPEG_MARKER_COM;
1061         }
1062
1063         DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n",
1064             parms->APP_len, parms->COM_len);
1065
1066         return 0;
1067 }
1068
1069 /******************************************************************************
1070  *
1071  *  ioctl_s_jpegcomp
1072  *
1073  *  V4L2 set the JPEG compression parameters
1074  *  NOTE: quality and some jpeg_markers are ignored.
1075  *
1076  *****************************************************************************/
1077
1078 static int cpia2_s_jpegcomp(struct file *file, void *fh, struct v4l2_jpegcompression *parms)
1079 {
1080         struct camera_data *cam = video_drvdata(file);
1081
1082         DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n",
1083             parms->APP_len, parms->COM_len);
1084
1085         cam->params.compression.inhibit_htables =
1086                 !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
1087
1088         if(parms->APP_len != 0) {
1089                 if(parms->APP_len > 0 &&
1090                    parms->APP_len <= sizeof(cam->APP_data) &&
1091                    parms->APPn >= 0 && parms->APPn <= 15) {
1092                         cam->APPn = parms->APPn;
1093                         cam->APP_len = parms->APP_len;
1094                         memcpy(cam->APP_data, parms->APP_data, parms->APP_len);
1095                 } else {
1096                         LOG("Bad APPn Params n=%d len=%d\n",
1097                             parms->APPn, parms->APP_len);
1098                         return -EINVAL;
1099                 }
1100         } else {
1101                 cam->APP_len = 0;
1102         }
1103
1104         if(parms->COM_len != 0) {
1105                 if(parms->COM_len > 0 &&
1106                    parms->COM_len <= sizeof(cam->COM_data)) {
1107                         cam->COM_len = parms->COM_len;
1108                         memcpy(cam->COM_data, parms->COM_data, parms->COM_len);
1109                 } else {
1110                         LOG("Bad COM_len=%d\n", parms->COM_len);
1111                         return -EINVAL;
1112                 }
1113         }
1114
1115         return 0;
1116 }
1117
1118 /******************************************************************************
1119  *
1120  *  ioctl_reqbufs
1121  *
1122  *  V4L2 Initiate memory mapping.
1123  *  NOTE: The user's request is ignored. For now the buffers are fixed.
1124  *
1125  *****************************************************************************/
1126
1127 static int cpia2_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *req)
1128 {
1129         struct camera_data *cam = video_drvdata(file);
1130
1131         if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1132            req->memory != V4L2_MEMORY_MMAP)
1133                 return -EINVAL;
1134
1135         DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames);
1136         req->count = cam->num_frames;
1137         memset(&req->reserved, 0, sizeof(req->reserved));
1138
1139         return 0;
1140 }
1141
1142 /******************************************************************************
1143  *
1144  *  ioctl_querybuf
1145  *
1146  *  V4L2 Query memory buffer status.
1147  *
1148  *****************************************************************************/
1149
1150 static int cpia2_querybuf(struct file *file, void *fh, struct v4l2_buffer *buf)
1151 {
1152         struct camera_data *cam = video_drvdata(file);
1153
1154         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1155            buf->index > cam->num_frames)
1156                 return -EINVAL;
1157
1158         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1159         buf->length = cam->frame_size;
1160
1161         buf->memory = V4L2_MEMORY_MMAP;
1162
1163         if(cam->mmapped)
1164                 buf->flags = V4L2_BUF_FLAG_MAPPED;
1165         else
1166                 buf->flags = 0;
1167
1168         switch (cam->buffers[buf->index].status) {
1169         case FRAME_EMPTY:
1170         case FRAME_ERROR:
1171         case FRAME_READING:
1172                 buf->bytesused = 0;
1173                 buf->flags = V4L2_BUF_FLAG_QUEUED;
1174                 break;
1175         case FRAME_READY:
1176                 buf->bytesused = cam->buffers[buf->index].length;
1177                 buf->timestamp = cam->buffers[buf->index].timestamp;
1178                 buf->sequence = cam->buffers[buf->index].seq;
1179                 buf->flags = V4L2_BUF_FLAG_DONE;
1180                 break;
1181         }
1182
1183         DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n",
1184              buf->index, buf->m.offset, buf->flags, buf->sequence,
1185              buf->bytesused);
1186
1187         return 0;
1188 }
1189
1190 /******************************************************************************
1191  *
1192  *  ioctl_qbuf
1193  *
1194  *  V4L2 User is freeing buffer
1195  *
1196  *****************************************************************************/
1197
1198 static int cpia2_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
1199 {
1200         struct camera_data *cam = video_drvdata(file);
1201
1202         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1203            buf->memory != V4L2_MEMORY_MMAP ||
1204            buf->index > cam->num_frames)
1205                 return -EINVAL;
1206
1207         DBG("QBUF #%d\n", buf->index);
1208
1209         if(cam->buffers[buf->index].status == FRAME_READY)
1210                 cam->buffers[buf->index].status = FRAME_EMPTY;
1211
1212         return 0;
1213 }
1214
1215 /******************************************************************************
1216  *
1217  *  find_earliest_filled_buffer
1218  *
1219  *  Helper for ioctl_dqbuf. Find the next ready buffer.
1220  *
1221  *****************************************************************************/
1222
1223 static int find_earliest_filled_buffer(struct camera_data *cam)
1224 {
1225         int i;
1226         int found = -1;
1227         for (i=0; i<cam->num_frames; i++) {
1228                 if(cam->buffers[i].status == FRAME_READY) {
1229                         if(found < 0) {
1230                                 found = i;
1231                         } else {
1232                                 /* find which buffer is earlier */
1233                                 struct timeval *tv1, *tv2;
1234                                 tv1 = &cam->buffers[i].timestamp;
1235                                 tv2 = &cam->buffers[found].timestamp;
1236                                 if(tv1->tv_sec < tv2->tv_sec ||
1237                                    (tv1->tv_sec == tv2->tv_sec &&
1238                                     tv1->tv_usec < tv2->tv_usec))
1239                                         found = i;
1240                         }
1241                 }
1242         }
1243         return found;
1244 }
1245
1246 /******************************************************************************
1247  *
1248  *  ioctl_dqbuf
1249  *
1250  *  V4L2 User is asking for a filled buffer.
1251  *
1252  *****************************************************************************/
1253
1254 static int cpia2_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
1255 {
1256         struct camera_data *cam = video_drvdata(file);
1257         int frame;
1258
1259         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1260            buf->memory != V4L2_MEMORY_MMAP)
1261                 return -EINVAL;
1262
1263         frame = find_earliest_filled_buffer(cam);
1264
1265         if(frame < 0 && file->f_flags&O_NONBLOCK)
1266                 return -EAGAIN;
1267
1268         if(frame < 0) {
1269                 /* Wait for a frame to become available */
1270                 struct framebuf *cb=cam->curbuff;
1271                 mutex_unlock(&cam->v4l2_lock);
1272                 wait_event_interruptible(cam->wq_stream,
1273                                          !cam->present ||
1274                                          (cb=cam->curbuff)->status == FRAME_READY);
1275                 mutex_lock(&cam->v4l2_lock);
1276                 if (signal_pending(current))
1277                         return -ERESTARTSYS;
1278                 if(!cam->present)
1279                         return -ENOTTY;
1280                 frame = cb->num;
1281         }
1282
1283
1284         buf->index = frame;
1285         buf->bytesused = cam->buffers[buf->index].length;
1286         buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE;
1287         buf->field = V4L2_FIELD_NONE;
1288         buf->timestamp = cam->buffers[buf->index].timestamp;
1289         buf->sequence = cam->buffers[buf->index].seq;
1290         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1291         buf->length = cam->frame_size;
1292         buf->input = 0;
1293         buf->reserved = 0;
1294         memset(&buf->timecode, 0, sizeof(buf->timecode));
1295
1296         DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index,
1297             cam->buffers[buf->index].status, buf->sequence, buf->bytesused);
1298
1299         return 0;
1300 }
1301
1302 static int cpia2_g_priority(struct file *file, void *_fh, enum v4l2_priority *p)
1303 {
1304         struct cpia2_fh *fh = _fh;
1305
1306         *p = fh->prio;
1307         return 0;
1308 }
1309
1310 static int cpia2_s_priority(struct file *file, void *_fh, enum v4l2_priority prio)
1311 {
1312         struct camera_data *cam = video_drvdata(file);
1313         struct cpia2_fh *fh = _fh;
1314
1315         if (cam->streaming && prio != fh->prio &&
1316                         fh->prio == V4L2_PRIORITY_RECORD)
1317                 /* Can't drop record priority while streaming */
1318                 return -EBUSY;
1319
1320         if (prio == V4L2_PRIORITY_RECORD && prio != fh->prio &&
1321                         v4l2_prio_max(&cam->prio) == V4L2_PRIORITY_RECORD)
1322                 /* Only one program can record at a time */
1323                 return -EBUSY;
1324         return v4l2_prio_change(&cam->prio, &fh->prio, prio);
1325 }
1326
1327 static int cpia2_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1328 {
1329         struct camera_data *cam = video_drvdata(file);
1330
1331         DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming);
1332         if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1333                 return -EINVAL;
1334
1335         if (!cam->streaming)
1336                 return cpia2_usb_stream_start(cam,
1337                                 cam->params.camera_state.stream_mode);
1338         return -EINVAL;
1339 }
1340
1341 static int cpia2_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
1342 {
1343         struct camera_data *cam = video_drvdata(file);
1344
1345         DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming);
1346         if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1347                 return -EINVAL;
1348
1349         if (cam->streaming)
1350                 return cpia2_usb_stream_stop(cam);
1351         return -EINVAL;
1352 }
1353
1354 /******************************************************************************
1355  *
1356  *  cpia2_mmap
1357  *
1358  *****************************************************************************/
1359 static int cpia2_mmap(struct file *file, struct vm_area_struct *area)
1360 {
1361         struct camera_data *cam = video_drvdata(file);
1362         int retval;
1363
1364         /* Priority check */
1365         struct cpia2_fh *fh = file->private_data;
1366         if(fh->prio != V4L2_PRIORITY_RECORD) {
1367                 return -EBUSY;
1368         }
1369
1370         retval = cpia2_remap_buffer(cam, area);
1371
1372         if(!retval)
1373                 fh->mmapped = 1;
1374         return retval;
1375 }
1376
1377 /******************************************************************************
1378  *
1379  *  reset_camera_struct_v4l
1380  *
1381  *  Sets all values to the defaults
1382  *****************************************************************************/
1383 static void reset_camera_struct_v4l(struct camera_data *cam)
1384 {
1385         cam->width = cam->params.roi.width;
1386         cam->height = cam->params.roi.height;
1387
1388         cam->frame_size = buffer_size;
1389         cam->num_frames = num_buffers;
1390
1391         /* FlickerModes */
1392         cam->params.flicker_control.flicker_mode_req = flicker_mode;
1393         cam->params.flicker_control.mains_frequency = flicker_freq;
1394
1395         /* streamMode */
1396         cam->params.camera_state.stream_mode = alternate;
1397
1398         cam->pixelformat = V4L2_PIX_FMT_JPEG;
1399         v4l2_prio_init(&cam->prio);
1400 }
1401
1402 static const struct v4l2_ioctl_ops cpia2_ioctl_ops = {
1403         .vidioc_querycap                    = cpia2_querycap,
1404         .vidioc_enum_input                  = cpia2_enum_input,
1405         .vidioc_g_input                     = cpia2_g_input,
1406         .vidioc_s_input                     = cpia2_s_input,
1407         .vidioc_enum_fmt_vid_cap            = cpia2_enum_fmt_vid_cap,
1408         .vidioc_g_fmt_vid_cap               = cpia2_g_fmt_vid_cap,
1409         .vidioc_s_fmt_vid_cap               = cpia2_s_fmt_vid_cap,
1410         .vidioc_try_fmt_vid_cap             = cpia2_try_fmt_vid_cap,
1411         .vidioc_queryctrl                   = cpia2_queryctrl,
1412         .vidioc_querymenu                   = cpia2_querymenu,
1413         .vidioc_g_ctrl                      = cpia2_g_ctrl,
1414         .vidioc_s_ctrl                      = cpia2_s_ctrl,
1415         .vidioc_g_jpegcomp                  = cpia2_g_jpegcomp,
1416         .vidioc_s_jpegcomp                  = cpia2_s_jpegcomp,
1417         .vidioc_cropcap                     = cpia2_cropcap,
1418         .vidioc_reqbufs                     = cpia2_reqbufs,
1419         .vidioc_querybuf                    = cpia2_querybuf,
1420         .vidioc_qbuf                        = cpia2_qbuf,
1421         .vidioc_dqbuf                       = cpia2_dqbuf,
1422         .vidioc_streamon                    = cpia2_streamon,
1423         .vidioc_streamoff                   = cpia2_streamoff,
1424         .vidioc_g_priority                  = cpia2_g_priority,
1425         .vidioc_s_priority                  = cpia2_s_priority,
1426         .vidioc_default                     = cpia2_default,
1427 };
1428
1429 /***
1430  * The v4l video device structure initialized for this device
1431  ***/
1432 static const struct v4l2_file_operations cpia2_fops = {
1433         .owner          = THIS_MODULE,
1434         .open           = cpia2_open,
1435         .release        = cpia2_close,
1436         .read           = cpia2_v4l_read,
1437         .poll           = cpia2_v4l_poll,
1438         .unlocked_ioctl = video_ioctl2,
1439         .mmap           = cpia2_mmap,
1440 };
1441
1442 static struct video_device cpia2_template = {
1443         /* I could not find any place for the old .initialize initializer?? */
1444         .name =         "CPiA2 Camera",
1445         .fops =         &cpia2_fops,
1446         .ioctl_ops =    &cpia2_ioctl_ops,
1447         .release =      video_device_release,
1448 };
1449
1450 /******************************************************************************
1451  *
1452  *  cpia2_register_camera
1453  *
1454  *****************************************************************************/
1455 int cpia2_register_camera(struct camera_data *cam)
1456 {
1457         cam->vdev = video_device_alloc();
1458         if(!cam->vdev)
1459                 return -ENOMEM;
1460
1461         memcpy(cam->vdev, &cpia2_template, sizeof(cpia2_template));
1462         video_set_drvdata(cam->vdev, cam);
1463         cam->vdev->lock = &cam->v4l2_lock;
1464
1465         reset_camera_struct_v4l(cam);
1466
1467         /* register v4l device */
1468         if (video_register_device(cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
1469                 ERR("video_register_device failed\n");
1470                 video_device_release(cam->vdev);
1471                 return -ENODEV;
1472         }
1473
1474         return 0;
1475 }
1476
1477 /******************************************************************************
1478  *
1479  *  cpia2_unregister_camera
1480  *
1481  *****************************************************************************/
1482 void cpia2_unregister_camera(struct camera_data *cam)
1483 {
1484         if (!cam->open_count) {
1485                 video_unregister_device(cam->vdev);
1486         } else {
1487                 LOG("%s removed while open, deferring "
1488                     "video_unregister_device\n",
1489                     video_device_node_name(cam->vdev));
1490         }
1491 }
1492
1493 /******************************************************************************
1494  *
1495  *  check_parameters
1496  *
1497  *  Make sure that all user-supplied parameters are sensible
1498  *****************************************************************************/
1499 static void __init check_parameters(void)
1500 {
1501         if(buffer_size < PAGE_SIZE) {
1502                 buffer_size = PAGE_SIZE;
1503                 LOG("buffer_size too small, setting to %d\n", buffer_size);
1504         } else if(buffer_size > 1024*1024) {
1505                 /* arbitrary upper limiit */
1506                 buffer_size = 1024*1024;
1507                 LOG("buffer_size ridiculously large, setting to %d\n",
1508                     buffer_size);
1509         } else {
1510                 buffer_size += PAGE_SIZE-1;
1511                 buffer_size &= ~(PAGE_SIZE-1);
1512         }
1513
1514         if(num_buffers < 1) {
1515                 num_buffers = 1;
1516                 LOG("num_buffers too small, setting to %d\n", num_buffers);
1517         } else if(num_buffers > VIDEO_MAX_FRAME) {
1518                 num_buffers = VIDEO_MAX_FRAME;
1519                 LOG("num_buffers too large, setting to %d\n", num_buffers);
1520         }
1521
1522         if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) {
1523                 alternate = DEFAULT_ALT;
1524                 LOG("alternate specified is invalid, using %d\n", alternate);
1525         }
1526
1527         if (flicker_mode != NEVER_FLICKER && flicker_mode != ANTI_FLICKER_ON) {
1528                 flicker_mode = NEVER_FLICKER;
1529                 LOG("Flicker mode specified is invalid, using %d\n",
1530                     flicker_mode);
1531         }
1532
1533         if (flicker_freq != FLICKER_50 && flicker_freq != FLICKER_60) {
1534                 flicker_freq = FLICKER_60;
1535                 LOG("Flicker mode specified is invalid, using %d\n",
1536                     flicker_freq);
1537         }
1538
1539         if(video_nr < -1 || video_nr > 64) {
1540                 video_nr = -1;
1541                 LOG("invalid video_nr specified, must be -1 to 64\n");
1542         }
1543
1544         DBG("Using %d buffers, each %d bytes, alternate=%d\n",
1545             num_buffers, buffer_size, alternate);
1546 }
1547
1548 /************   Module Stuff ***************/
1549
1550
1551 /******************************************************************************
1552  *
1553  * cpia2_init/module_init
1554  *
1555  *****************************************************************************/
1556 static int __init cpia2_init(void)
1557 {
1558         LOG("%s v%s\n",
1559             ABOUT, CPIA_VERSION);
1560         check_parameters();
1561         cpia2_usb_init();
1562         return 0;
1563 }
1564
1565
1566 /******************************************************************************
1567  *
1568  * cpia2_exit/module_exit
1569  *
1570  *****************************************************************************/
1571 static void __exit cpia2_exit(void)
1572 {
1573         cpia2_usb_cleanup();
1574         schedule_timeout(2 * HZ);
1575 }
1576
1577 module_init(cpia2_init);
1578 module_exit(cpia2_exit);