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         int retval = 0;
 242
 243         if (!cam) {
 244                 ERR("Internal error, camera_data not found!\n");
 245                 return -ENODEV;
 246         }
 247
 248         if(mutex_lock_interruptible(&cam->busy_lock))
 249                 return -ERESTARTSYS;
 250
 251         if(!cam->present) {
 252                 retval = -ENODEV;
 253                 goto err_return;
 254         }
 255
 256         if (cam->open_count > 0) {
 257                 goto skip_init;
 258         }
 259
 260         if (cpia2_allocate_buffers(cam)) {
 261                 retval = -ENOMEM;
 262                 goto err_return;
 263         }
 264
 265         /* reset the camera */
 266         if (cpia2_reset_camera(cam) < 0) {
 267                 retval = -EIO;
 268                 goto err_return;
 269         }
 270
 271         cam->APP_len = 0;
 272         cam->COM_len = 0;
 273
 274 skip_init:
 275         {
 276                 struct cpia2_fh *fh = kmalloc(sizeof(*fh),GFP_KERNEL);
 277                 if(!fh) {
 278                         retval = -ENOMEM;
 279                         goto err_return;
 280                 }
 281                 file->private_data = fh;
 282                 fh->prio = V4L2_PRIORITY_UNSET;
 283                 v4l2_prio_open(&cam->prio, &fh->prio);
 284                 fh->mmapped = 0;
 285         }
 286
 287         ++cam->open_count;
 288
 289         cpia2_dbg_dump_registers(cam);
 290
 291 err_return:
 292         mutex_unlock(&cam->busy_lock);
 293         return retval;
 294 }
 295
 296 /******************************************************************************
 297  *
 298  *  cpia2_close
 299  *
 300  *****************************************************************************/
 301 static int cpia2_close(struct file *file)
 302 {
 303         struct video_device *dev = video_devdata(file);
 304         struct camera_data *cam = video_get_drvdata(dev);
 305         struct cpia2_fh *fh = file->private_data;
 306
 307         mutex_lock(&cam->busy_lock);
 308
 309         if (cam->present &&
 310             (cam->open_count == 1
 311              || fh->prio == V4L2_PRIORITY_RECORD
 312             )) {
 313                 cpia2_usb_stream_stop(cam);
 314
 315                 if(cam->open_count == 1) {
 316                         /* save camera state for later open */
 317                         cpia2_save_camera_state(cam);
 318
 319                         cpia2_set_low_power(cam);
 320                         cpia2_free_buffers(cam);
 321                 }
 322         }
 323
 324         {
 325                 if(fh->mmapped)
 326                         cam->mmapped = 0;
 327                 v4l2_prio_close(&cam->prio, fh->prio);
 328                 file->private_data = NULL;
 329                 kfree(fh);
 330         }
 331
 332         if (--cam->open_count == 0) {
 333                 cpia2_free_buffers(cam);
 334                 if (!cam->present) {
 335                         video_unregister_device(dev);
 336                         mutex_unlock(&cam->busy_lock);
 337                         kfree(cam);
 338                         return 0;
 339                 }
 340         }
 341
 342         mutex_unlock(&cam->busy_lock);
 343
 344         return 0;
 345 }
 346
 347 /******************************************************************************
 348  *
 349  *  cpia2_v4l_read
 350  *
 351  *****************************************************************************/
 352 static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count,
 353                               loff_t *off)
 354 {
 355         struct camera_data *cam = video_drvdata(file);
 356         int noblock = file->f_flags&O_NONBLOCK;
 357
 358         struct cpia2_fh *fh = file->private_data;
 359
 360         if(!cam)
 361                 return -EINVAL;
 362
 363         /* Priority check */
 364         if(fh->prio != V4L2_PRIORITY_RECORD) {
 365                 return -EBUSY;
 366         }
 367
 368         return cpia2_read(cam, buf, count, noblock);
 369 }
 370
 371
 372 /******************************************************************************
 373  *
 374  *  cpia2_v4l_poll
 375  *
 376  *****************************************************************************/
 377 static unsigned int cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait)
 378 {
 379         struct camera_data *cam = video_drvdata(filp);
 380         struct cpia2_fh *fh = filp->private_data;
 381
 382         if(!cam)
 383                 return POLLERR;
 384
 385         /* Priority check */
 386         if(fh->prio != V4L2_PRIORITY_RECORD) {
 387                 return POLLERR;
 388         }
 389
 390         return cpia2_poll(cam, filp, wait);
 391 }
 392
 393
 394 static int sync(struct camera_data *cam, int frame_nr)
 395 {
 396         struct framebuf *frame = &cam->buffers[frame_nr];
 397
 398         while (1) {
 399                 if (frame->status == FRAME_READY)
 400                         return 0;
 401
 402                 if (!cam->streaming) {
 403                         frame->status = FRAME_READY;
 404                         frame->length = 0;
 405                         return 0;
 406                 }
 407
 408                 mutex_unlock(&cam->busy_lock);
 409                 wait_event_interruptible(cam->wq_stream,
 410                                          !cam->streaming ||
 411                                          frame->status == FRAME_READY);
 412                 mutex_lock(&cam->busy_lock);
 413                 if (signal_pending(current))
 414                         return -ERESTARTSYS;
 415                 if(!cam->present)
 416                         return -ENOTTY;
 417         }
 418 }
 419
 420 /******************************************************************************
 421  *
 422  *  ioctl_set_gpio
 423  *
 424  *****************************************************************************/
 425
 426 static int ioctl_set_gpio(void *arg, struct camera_data *cam)
 427 {
 428         __u32 gpio_val;
 429
 430         gpio_val = *(__u32*) arg;
 431
 432         if (gpio_val &~ 0xFFU)
 433                 return -EINVAL;
 434
 435         return cpia2_set_gpio(cam, (unsigned char)gpio_val);
 436 }
 437
 438 /******************************************************************************
 439  *
 440  *  ioctl_querycap
 441  *
 442  *  V4L2 device capabilities
 443  *
 444  *****************************************************************************/
 445
 446 static int ioctl_querycap(void *arg, struct camera_data *cam)
 447 {
 448         struct v4l2_capability *vc = arg;
 449
 450         memset(vc, 0, sizeof(*vc));
 451         strcpy(vc->driver, "cpia2");
 452
 453         if (cam->params.pnp_id.product == 0x151)
 454                 strcpy(vc->card, "QX5 Microscope");
 455         else
 456                 strcpy(vc->card, "CPiA2 Camera");
 457         switch (cam->params.pnp_id.device_type) {
 458         case DEVICE_STV_672:
 459                 strcat(vc->card, " (672/");
 460                 break;
 461         case DEVICE_STV_676:
 462                 strcat(vc->card, " (676/");
 463                 break;
 464         default:
 465                 strcat(vc->card, " (???/");
 466                 break;
 467         }
 468         switch (cam->params.version.sensor_flags) {
 469         case CPIA2_VP_SENSOR_FLAGS_404:
 470                 strcat(vc->card, "404)");
 471                 break;
 472         case CPIA2_VP_SENSOR_FLAGS_407:
 473                 strcat(vc->card, "407)");
 474                 break;
 475         case CPIA2_VP_SENSOR_FLAGS_409:
 476                 strcat(vc->card, "409)");
 477                 break;
 478         case CPIA2_VP_SENSOR_FLAGS_410:
 479                 strcat(vc->card, "410)");
 480                 break;
 481         case CPIA2_VP_SENSOR_FLAGS_500:
 482                 strcat(vc->card, "500)");
 483                 break;
 484         default:
 485                 strcat(vc->card, "???)");
 486                 break;
 487         }
 488
 489         if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0)
 490                 memset(vc->bus_info,0, sizeof(vc->bus_info));
 491
 492         vc->version = KERNEL_VERSION(CPIA2_MAJ_VER, CPIA2_MIN_VER,
 493                                      CPIA2_PATCH_VER);
 494
 495         vc->capabilities = V4L2_CAP_VIDEO_CAPTURE |
 496                            V4L2_CAP_READWRITE |
 497                            V4L2_CAP_STREAMING;
 498
 499         return 0;
 500 }
 501
 502 /******************************************************************************
 503  *
 504  *  ioctl_input
 505  *
 506  *  V4L2 input get/set/enumerate
 507  *
 508  *****************************************************************************/
 509
 510 static int ioctl_input(unsigned int ioclt_nr,void *arg,struct camera_data *cam)
 511 {
 512         struct v4l2_input *i = arg;
 513
 514         if(ioclt_nr  != VIDIOC_G_INPUT) {
 515                 if (i->index != 0)
 516                        return -EINVAL;
 517         }
 518
 519         memset(i, 0, sizeof(*i));
 520         strcpy(i->name, "Camera");
 521         i->type = V4L2_INPUT_TYPE_CAMERA;
 522
 523         return 0;
 524 }
 525
 526 /******************************************************************************
 527  *
 528  *  ioctl_enum_fmt
 529  *
 530  *  V4L2 format enumerate
 531  *
 532  *****************************************************************************/
 533
 534 static int ioctl_enum_fmt(void *arg,struct camera_data *cam)
 535 {
 536         struct v4l2_fmtdesc *f = arg;
 537         int index = f->index;
 538
 539         if (index < 0 || index > 1)
 540                return -EINVAL;
 541
 542         memset(f, 0, sizeof(*f));
 543         f->index = index;
 544         f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 545         f->flags = V4L2_FMT_FLAG_COMPRESSED;
 546         switch(index) {
 547         case 0:
 548                 strcpy(f->description, "MJPEG");
 549                 f->pixelformat = V4L2_PIX_FMT_MJPEG;
 550                 break;
 551         case 1:
 552                 strcpy(f->description, "JPEG");
 553                 f->pixelformat = V4L2_PIX_FMT_JPEG;
 554                 break;
 555         default:
 556                 return -EINVAL;
 557         }
 558
 559         return 0;
 560 }
 561
 562 /******************************************************************************
 563  *
 564  *  ioctl_try_fmt
 565  *
 566  *  V4L2 format try
 567  *
 568  *****************************************************************************/
 569
 570 static int ioctl_try_fmt(void *arg,struct camera_data *cam)
 571 {
 572         struct v4l2_format *f = arg;
 573
 574         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 575                return -EINVAL;
 576
 577         if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG &&
 578             f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
 579                return -EINVAL;
 580
 581         f->fmt.pix.field = V4L2_FIELD_NONE;
 582         f->fmt.pix.bytesperline = 0;
 583         f->fmt.pix.sizeimage = cam->frame_size;
 584         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 585         f->fmt.pix.priv = 0;
 586
 587         switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
 588         case VIDEOSIZE_VGA:
 589                 f->fmt.pix.width = 640;
 590                 f->fmt.pix.height = 480;
 591                 break;
 592         case VIDEOSIZE_CIF:
 593                 f->fmt.pix.width = 352;
 594                 f->fmt.pix.height = 288;
 595                 break;
 596         case VIDEOSIZE_QVGA:
 597                 f->fmt.pix.width = 320;
 598                 f->fmt.pix.height = 240;
 599                 break;
 600         case VIDEOSIZE_288_216:
 601                 f->fmt.pix.width = 288;
 602                 f->fmt.pix.height = 216;
 603                 break;
 604         case VIDEOSIZE_256_192:
 605                 f->fmt.pix.width = 256;
 606                 f->fmt.pix.height = 192;
 607                 break;
 608         case VIDEOSIZE_224_168:
 609                 f->fmt.pix.width = 224;
 610                 f->fmt.pix.height = 168;
 611                 break;
 612         case VIDEOSIZE_192_144:
 613                 f->fmt.pix.width = 192;
 614                 f->fmt.pix.height = 144;
 615                 break;
 616         case VIDEOSIZE_QCIF:
 617         default:
 618                 f->fmt.pix.width = 176;
 619                 f->fmt.pix.height = 144;
 620                 break;
 621         }
 622
 623         return 0;
 624 }
 625
 626 /******************************************************************************
 627  *
 628  *  ioctl_set_fmt
 629  *
 630  *  V4L2 format set
 631  *
 632  *****************************************************************************/
 633
 634 static int ioctl_set_fmt(void *arg,struct camera_data *cam, struct cpia2_fh *fh)
 635 {
 636         struct v4l2_format *f = arg;
 637         int err, frame;
 638
 639         err = ioctl_try_fmt(arg, cam);
 640         if(err != 0)
 641                 return err;
 642
 643         /* Ensure that only this process can change the format. */
 644         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
 645         if(err != 0) {
 646                 return err;
 647         }
 648
 649         cam->pixelformat = f->fmt.pix.pixelformat;
 650
 651         /* NOTE: This should be set to 1 for MJPEG, but some apps don't handle
 652          * the missing Huffman table properly. */
 653         cam->params.compression.inhibit_htables = 0;
 654                 /*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/
 655
 656         /* we set the video window to something smaller or equal to what
 657          * is requested by the user???
 658          */
 659         DBG("Requested width = %d, height = %d\n",
 660             f->fmt.pix.width, f->fmt.pix.height);
 661         if (f->fmt.pix.width != cam->width ||
 662             f->fmt.pix.height != cam->height) {
 663                 cam->width = f->fmt.pix.width;
 664                 cam->height = f->fmt.pix.height;
 665                 cam->params.roi.width = f->fmt.pix.width;
 666                 cam->params.roi.height = f->fmt.pix.height;
 667                 cpia2_set_format(cam);
 668         }
 669
 670         for (frame = 0; frame < cam->num_frames; ++frame) {
 671                 if (cam->buffers[frame].status == FRAME_READING)
 672                         if ((err = sync(cam, frame)) < 0)
 673                                 return err;
 674
 675                 cam->buffers[frame].status = FRAME_EMPTY;
 676         }
 677
 678         return 0;
 679 }
 680
 681 /******************************************************************************
 682  *
 683  *  ioctl_get_fmt
 684  *
 685  *  V4L2 format get
 686  *
 687  *****************************************************************************/
 688
 689 static int ioctl_get_fmt(void *arg,struct camera_data *cam)
 690 {
 691         struct v4l2_format *f = arg;
 692
 693         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 694                return -EINVAL;
 695
 696         f->fmt.pix.width = cam->width;
 697         f->fmt.pix.height = cam->height;
 698         f->fmt.pix.pixelformat = cam->pixelformat;
 699         f->fmt.pix.field = V4L2_FIELD_NONE;
 700         f->fmt.pix.bytesperline = 0;
 701         f->fmt.pix.sizeimage = cam->frame_size;
 702         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 703         f->fmt.pix.priv = 0;
 704
 705         return 0;
 706 }
 707
 708 /******************************************************************************
 709  *
 710  *  ioctl_cropcap
 711  *
 712  *  V4L2 query cropping capabilities
 713  *  NOTE: cropping is currently disabled
 714  *
 715  *****************************************************************************/
 716
 717 static int ioctl_cropcap(void *arg,struct camera_data *cam)
 718 {
 719         struct v4l2_cropcap *c = arg;
 720
 721         if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 722                return -EINVAL;
 723
 724         c->bounds.left = 0;
 725         c->bounds.top = 0;
 726         c->bounds.width = cam->width;
 727         c->bounds.height = cam->height;
 728         c->defrect.left = 0;
 729         c->defrect.top = 0;
 730         c->defrect.width = cam->width;
 731         c->defrect.height = cam->height;
 732         c->pixelaspect.numerator = 1;
 733         c->pixelaspect.denominator = 1;
 734
 735         return 0;
 736 }
 737
 738 /******************************************************************************
 739  *
 740  *  ioctl_queryctrl
 741  *
 742  *  V4L2 query possible control variables
 743  *
 744  *****************************************************************************/
 745
 746 static int ioctl_queryctrl(void *arg,struct camera_data *cam)
 747 {
 748         struct v4l2_queryctrl *c = arg;
 749         int i;
 750
 751         for(i=0; i<NUM_CONTROLS; ++i) {
 752                 if(c->id == controls[i].id) {
 753                         memcpy(c, controls+i, sizeof(*c));
 754                         break;
 755                 }
 756         }
 757
 758         if(i == NUM_CONTROLS)
 759                 return -EINVAL;
 760
 761         /* Some devices have additional limitations */
 762         switch(c->id) {
 763         case V4L2_CID_BRIGHTNESS:
 764                 /***
 765                  * Don't let the register be set to zero - bug in VP4
 766                  * flash of full brightness
 767                  ***/
 768                 if (cam->params.pnp_id.device_type == DEVICE_STV_672)
 769                         c->minimum = 1;
 770                 break;
 771         case V4L2_CID_VFLIP:
 772                 // VP5 Only
 773                 if(cam->params.pnp_id.device_type == DEVICE_STV_672)
 774                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
 775                 break;
 776         case CPIA2_CID_FRAMERATE:
 777                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
 778                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
 779                         // Maximum 15fps
 780                         for(i=0; i<c->maximum; ++i) {
 781                                 if(framerate_controls[i].value ==
 782                                    CPIA2_VP_FRAMERATE_15) {
 783                                         c->maximum = i;
 784                                         c->default_value = i;
 785                                 }
 786                         }
 787                 }
 788                 break;
 789         case CPIA2_CID_FLICKER_MODE:
 790                 // Flicker control only valid for 672.
 791                 if(cam->params.pnp_id.device_type != DEVICE_STV_672)
 792                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
 793                 break;
 794         case CPIA2_CID_LIGHTS:
 795                 // Light control only valid for the QX5 Microscope.
 796                 if(cam->params.pnp_id.product != 0x151)
 797                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
 798                 break;
 799         default:
 800                 break;
 801         }
 802
 803         return 0;
 804 }
 805
 806 /******************************************************************************
 807  *
 808  *  ioctl_querymenu
 809  *
 810  *  V4L2 query possible control variables
 811  *
 812  *****************************************************************************/
 813
 814 static int ioctl_querymenu(void *arg,struct camera_data *cam)
 815 {
 816         struct v4l2_querymenu *m = arg;
 817
 818         memset(m->name, 0, sizeof(m->name));
 819         m->reserved = 0;
 820
 821         switch(m->id) {
 822         case CPIA2_CID_FLICKER_MODE:
 823                 if (m->index >= NUM_FLICKER_CONTROLS)
 824                         return -EINVAL;
 825
 826                 strcpy(m->name, flicker_controls[m->index].name);
 827                 break;
 828         case CPIA2_CID_FRAMERATE:
 829             {
 830                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
 831                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
 832                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
 833                         // Maximum 15fps
 834                         int i;
 835                         for(i=0; i<maximum; ++i) {
 836                                 if(framerate_controls[i].value ==
 837                                    CPIA2_VP_FRAMERATE_15)
 838                                         maximum = i;
 839                         }
 840                 }
 841                 if (m->index > maximum)
 842                         return -EINVAL;
 843
 844                 strcpy(m->name, framerate_controls[m->index].name);
 845                 break;
 846             }
 847         case CPIA2_CID_LIGHTS:
 848                 if (m->index >= NUM_LIGHTS_CONTROLS)
 849                         return -EINVAL;
 850
 851                 strcpy(m->name, lights_controls[m->index].name);
 852                 break;
 853         default:
 854                 return -EINVAL;
 855         }
 856
 857         return 0;
 858 }
 859
 860 /******************************************************************************
 861  *
 862  *  ioctl_g_ctrl
 863  *
 864  *  V4L2 get the value of a control variable
 865  *
 866  *****************************************************************************/
 867
 868 static int ioctl_g_ctrl(void *arg,struct camera_data *cam)
 869 {
 870         struct v4l2_control *c = arg;
 871
 872         switch(c->id) {
 873         case V4L2_CID_BRIGHTNESS:
 874                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_BRIGHTNESS,
 875                                  TRANSFER_READ, 0);
 876                 c->value = cam->params.color_params.brightness;
 877                 break;
 878         case V4L2_CID_CONTRAST:
 879                 cpia2_do_command(cam, CPIA2_CMD_GET_CONTRAST,
 880                                  TRANSFER_READ, 0);
 881                 c->value = cam->params.color_params.contrast;
 882                 break;
 883         case V4L2_CID_SATURATION:
 884                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_SATURATION,
 885                                  TRANSFER_READ, 0);
 886                 c->value = cam->params.color_params.saturation;
 887                 break;
 888         case V4L2_CID_HFLIP:
 889                 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
 890                                  TRANSFER_READ, 0);
 891                 c->value = (cam->params.vp_params.user_effects &
 892                             CPIA2_VP_USER_EFFECTS_MIRROR) != 0;
 893                 break;
 894         case V4L2_CID_VFLIP:
 895                 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
 896                                  TRANSFER_READ, 0);
 897                 c->value = (cam->params.vp_params.user_effects &
 898                             CPIA2_VP_USER_EFFECTS_FLIP) != 0;
 899                 break;
 900         case CPIA2_CID_TARGET_KB:
 901                 c->value = cam->params.vc_params.target_kb;
 902                 break;
 903         case CPIA2_CID_GPIO:
 904                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
 905                                  TRANSFER_READ, 0);
 906                 c->value = cam->params.vp_params.gpio_data;
 907                 break;
 908         case CPIA2_CID_FLICKER_MODE:
 909         {
 910                 int i, mode;
 911                 cpia2_do_command(cam, CPIA2_CMD_GET_FLICKER_MODES,
 912                                  TRANSFER_READ, 0);
 913                 if(cam->params.flicker_control.cam_register &
 914                    CPIA2_VP_FLICKER_MODES_NEVER_FLICKER) {
 915                         mode = NEVER_FLICKER;
 916                 } else {
 917                     if(cam->params.flicker_control.cam_register &
 918                        CPIA2_VP_FLICKER_MODES_50HZ) {
 919                         mode = FLICKER_50;
 920                     } else {
 921                         mode = FLICKER_60;
 922                     }
 923                 }
 924                 for(i=0; i<NUM_FLICKER_CONTROLS; i++) {
 925                         if(flicker_controls[i].value == mode) {
 926                                 c->value = i;
 927                                 break;
 928                         }
 929                 }
 930                 if(i == NUM_FLICKER_CONTROLS)
 931                         return -EINVAL;
 932                 break;
 933         }
 934         case CPIA2_CID_FRAMERATE:
 935         {
 936                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
 937                 int i;
 938                 for(i=0; i<= maximum; i++) {
 939                         if(cam->params.vp_params.frame_rate ==
 940                            framerate_controls[i].value)
 941                                 break;
 942                 }
 943                 if(i > maximum)
 944                         return -EINVAL;
 945                 c->value = i;
 946                 break;
 947         }
 948         case CPIA2_CID_USB_ALT:
 949                 c->value = cam->params.camera_state.stream_mode;
 950                 break;
 951         case CPIA2_CID_LIGHTS:
 952         {
 953                 int i;
 954                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
 955                                  TRANSFER_READ, 0);
 956                 for(i=0; i<NUM_LIGHTS_CONTROLS; i++) {
 957                         if((cam->params.vp_params.gpio_data&GPIO_LIGHTS_MASK) ==
 958                            lights_controls[i].value) {
 959                                 break;
 960                         }
 961                 }
 962                 if(i == NUM_LIGHTS_CONTROLS)
 963                         return -EINVAL;
 964                 c->value = i;
 965                 break;
 966         }
 967         case CPIA2_CID_RESET_CAMERA:
 968                 return -EINVAL;
 969         default:
 970                 return -EINVAL;
 971         }
 972
 973         DBG("Get control id:%d, value:%d\n", c->id, c->value);
 974
 975         return 0;
 976 }
 977
 978 /******************************************************************************
 979  *
 980  *  ioctl_s_ctrl
 981  *
 982  *  V4L2 set the value of a control variable
 983  *
 984  *****************************************************************************/
 985
 986 static int ioctl_s_ctrl(void *arg,struct camera_data *cam)
 987 {
 988         struct v4l2_control *c = arg;
 989         int i;
 990         int retval = 0;
 991
 992         DBG("Set control id:%d, value:%d\n", c->id, c->value);
 993
 994         /* Check that the value is in range */
 995         for(i=0; i<NUM_CONTROLS; i++) {
 996                 if(c->id == controls[i].id) {
 997                         if(c->value < controls[i].minimum ||
 998                            c->value > controls[i].maximum) {
 999                                 return -EINVAL;
1000                         }
1001                         break;
1002                 }
1003         }
1004         if(i == NUM_CONTROLS)
1005                 return -EINVAL;
1006
1007         switch(c->id) {
1008         case V4L2_CID_BRIGHTNESS:
1009                 cpia2_set_brightness(cam, c->value);
1010                 break;
1011         case V4L2_CID_CONTRAST:
1012                 cpia2_set_contrast(cam, c->value);
1013                 break;
1014         case V4L2_CID_SATURATION:
1015                 cpia2_set_saturation(cam, c->value);
1016                 break;
1017         case V4L2_CID_HFLIP:
1018                 cpia2_set_property_mirror(cam, c->value);
1019                 break;
1020         case V4L2_CID_VFLIP:
1021                 cpia2_set_property_flip(cam, c->value);
1022                 break;
1023         case CPIA2_CID_TARGET_KB:
1024                 retval = cpia2_set_target_kb(cam, c->value);
1025                 break;
1026         case CPIA2_CID_GPIO:
1027                 retval = cpia2_set_gpio(cam, c->value);
1028                 break;
1029         case CPIA2_CID_FLICKER_MODE:
1030                 retval = cpia2_set_flicker_mode(cam,
1031                                               flicker_controls[c->value].value);
1032                 break;
1033         case CPIA2_CID_FRAMERATE:
1034                 retval = cpia2_set_fps(cam, framerate_controls[c->value].value);
1035                 break;
1036         case CPIA2_CID_USB_ALT:
1037                 retval = cpia2_usb_change_streaming_alternate(cam, c->value);
1038                 break;
1039         case CPIA2_CID_LIGHTS:
1040                 retval = cpia2_set_gpio(cam, lights_controls[c->value].value);
1041                 break;
1042         case CPIA2_CID_RESET_CAMERA:
1043                 cpia2_usb_stream_pause(cam);
1044                 cpia2_reset_camera(cam);
1045                 cpia2_usb_stream_resume(cam);
1046                 break;
1047         default:
1048                 retval = -EINVAL;
1049         }
1050
1051         return retval;
1052 }
1053
1054 /******************************************************************************
1055  *
1056  *  ioctl_g_jpegcomp
1057  *
1058  *  V4L2 get the JPEG compression parameters
1059  *
1060  *****************************************************************************/
1061
1062 static int ioctl_g_jpegcomp(void *arg,struct camera_data *cam)
1063 {
1064         struct v4l2_jpegcompression *parms = arg;
1065
1066         memset(parms, 0, sizeof(*parms));
1067
1068         parms->quality = 80; // TODO: Can this be made meaningful?
1069
1070         parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI;
1071         if(!cam->params.compression.inhibit_htables) {
1072                 parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT;
1073         }
1074
1075         parms->APPn = cam->APPn;
1076         parms->APP_len = cam->APP_len;
1077         if(cam->APP_len > 0) {
1078                 memcpy(parms->APP_data, cam->APP_data, cam->APP_len);
1079                 parms->jpeg_markers |= V4L2_JPEG_MARKER_APP;
1080         }
1081
1082         parms->COM_len = cam->COM_len;
1083         if(cam->COM_len > 0) {
1084                 memcpy(parms->COM_data, cam->COM_data, cam->COM_len);
1085                 parms->jpeg_markers |= JPEG_MARKER_COM;
1086         }
1087
1088         DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n",
1089             parms->APP_len, parms->COM_len);
1090
1091         return 0;
1092 }
1093
1094 /******************************************************************************
1095  *
1096  *  ioctl_s_jpegcomp
1097  *
1098  *  V4L2 set the JPEG compression parameters
1099  *  NOTE: quality and some jpeg_markers are ignored.
1100  *
1101  *****************************************************************************/
1102
1103 static int ioctl_s_jpegcomp(void *arg,struct camera_data *cam)
1104 {
1105         struct v4l2_jpegcompression *parms = arg;
1106
1107         DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n",
1108             parms->APP_len, parms->COM_len);
1109
1110         cam->params.compression.inhibit_htables =
1111                 !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
1112
1113         if(parms->APP_len != 0) {
1114                 if(parms->APP_len > 0 &&
1115                    parms->APP_len <= sizeof(cam->APP_data) &&
1116                    parms->APPn >= 0 && parms->APPn <= 15) {
1117                         cam->APPn = parms->APPn;
1118                         cam->APP_len = parms->APP_len;
1119                         memcpy(cam->APP_data, parms->APP_data, parms->APP_len);
1120                 } else {
1121                         LOG("Bad APPn Params n=%d len=%d\n",
1122                             parms->APPn, parms->APP_len);
1123                         return -EINVAL;
1124                 }
1125         } else {
1126                 cam->APP_len = 0;
1127         }
1128
1129         if(parms->COM_len != 0) {
1130                 if(parms->COM_len > 0 &&
1131                    parms->COM_len <= sizeof(cam->COM_data)) {
1132                         cam->COM_len = parms->COM_len;
1133                         memcpy(cam->COM_data, parms->COM_data, parms->COM_len);
1134                 } else {
1135                         LOG("Bad COM_len=%d\n", parms->COM_len);
1136                         return -EINVAL;
1137                 }
1138         }
1139
1140         return 0;
1141 }
1142
1143 /******************************************************************************
1144  *
1145  *  ioctl_reqbufs
1146  *
1147  *  V4L2 Initiate memory mapping.
1148  *  NOTE: The user's request is ignored. For now the buffers are fixed.
1149  *
1150  *****************************************************************************/
1151
1152 static int ioctl_reqbufs(void *arg,struct camera_data *cam)
1153 {
1154         struct v4l2_requestbuffers *req = arg;
1155
1156         if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1157            req->memory != V4L2_MEMORY_MMAP)
1158                 return -EINVAL;
1159
1160         DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames);
1161         req->count = cam->num_frames;
1162         memset(&req->reserved, 0, sizeof(req->reserved));
1163
1164         return 0;
1165 }
1166
1167 /******************************************************************************
1168  *
1169  *  ioctl_querybuf
1170  *
1171  *  V4L2 Query memory buffer status.
1172  *
1173  *****************************************************************************/
1174
1175 static int ioctl_querybuf(void *arg,struct camera_data *cam)
1176 {
1177         struct v4l2_buffer *buf = arg;
1178
1179         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1180            buf->index > cam->num_frames)
1181                 return -EINVAL;
1182
1183         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1184         buf->length = cam->frame_size;
1185
1186         buf->memory = V4L2_MEMORY_MMAP;
1187
1188         if(cam->mmapped)
1189                 buf->flags = V4L2_BUF_FLAG_MAPPED;
1190         else
1191                 buf->flags = 0;
1192
1193         switch (cam->buffers[buf->index].status) {
1194         case FRAME_EMPTY:
1195         case FRAME_ERROR:
1196         case FRAME_READING:
1197                 buf->bytesused = 0;
1198                 buf->flags = V4L2_BUF_FLAG_QUEUED;
1199                 break;
1200         case FRAME_READY:
1201                 buf->bytesused = cam->buffers[buf->index].length;
1202                 buf->timestamp = cam->buffers[buf->index].timestamp;
1203                 buf->sequence = cam->buffers[buf->index].seq;
1204                 buf->flags = V4L2_BUF_FLAG_DONE;
1205                 break;
1206         }
1207
1208         DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n",
1209              buf->index, buf->m.offset, buf->flags, buf->sequence,
1210              buf->bytesused);
1211
1212         return 0;
1213 }
1214
1215 /******************************************************************************
1216  *
1217  *  ioctl_qbuf
1218  *
1219  *  V4L2 User is freeing buffer
1220  *
1221  *****************************************************************************/
1222
1223 static int ioctl_qbuf(void *arg,struct camera_data *cam)
1224 {
1225         struct v4l2_buffer *buf = arg;
1226
1227         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1228            buf->memory != V4L2_MEMORY_MMAP ||
1229            buf->index > cam->num_frames)
1230                 return -EINVAL;
1231
1232         DBG("QBUF #%d\n", buf->index);
1233
1234         if(cam->buffers[buf->index].status == FRAME_READY)
1235                 cam->buffers[buf->index].status = FRAME_EMPTY;
1236
1237         return 0;
1238 }
1239
1240 /******************************************************************************
1241  *
1242  *  find_earliest_filled_buffer
1243  *
1244  *  Helper for ioctl_dqbuf. Find the next ready buffer.
1245  *
1246  *****************************************************************************/
1247
1248 static int find_earliest_filled_buffer(struct camera_data *cam)
1249 {
1250         int i;
1251         int found = -1;
1252         for (i=0; i<cam->num_frames; i++) {
1253                 if(cam->buffers[i].status == FRAME_READY) {
1254                         if(found < 0) {
1255                                 found = i;
1256                         } else {
1257                                 /* find which buffer is earlier */
1258                                 struct timeval *tv1, *tv2;
1259                                 tv1 = &cam->buffers[i].timestamp;
1260                                 tv2 = &cam->buffers[found].timestamp;
1261                                 if(tv1->tv_sec < tv2->tv_sec ||
1262                                    (tv1->tv_sec == tv2->tv_sec &&
1263                                     tv1->tv_usec < tv2->tv_usec))
1264                                         found = i;
1265                         }
1266                 }
1267         }
1268         return found;
1269 }
1270
1271 /******************************************************************************
1272  *
1273  *  ioctl_dqbuf
1274  *
1275  *  V4L2 User is asking for a filled buffer.
1276  *
1277  *****************************************************************************/
1278
1279 static int ioctl_dqbuf(void *arg,struct camera_data *cam, struct file *file)
1280 {
1281         struct v4l2_buffer *buf = arg;
1282         int frame;
1283
1284         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1285            buf->memory != V4L2_MEMORY_MMAP)
1286                 return -EINVAL;
1287
1288         frame = find_earliest_filled_buffer(cam);
1289
1290         if(frame < 0 && file->f_flags&O_NONBLOCK)
1291                 return -EAGAIN;
1292
1293         if(frame < 0) {
1294                 /* Wait for a frame to become available */
1295                 struct framebuf *cb=cam->curbuff;
1296                 mutex_unlock(&cam->busy_lock);
1297                 wait_event_interruptible(cam->wq_stream,
1298                                          !cam->present ||
1299                                          (cb=cam->curbuff)->status == FRAME_READY);
1300                 mutex_lock(&cam->busy_lock);
1301                 if (signal_pending(current))
1302                         return -ERESTARTSYS;
1303                 if(!cam->present)
1304                         return -ENOTTY;
1305                 frame = cb->num;
1306         }
1307
1308
1309         buf->index = frame;
1310         buf->bytesused = cam->buffers[buf->index].length;
1311         buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE;
1312         buf->field = V4L2_FIELD_NONE;
1313         buf->timestamp = cam->buffers[buf->index].timestamp;
1314         buf->sequence = cam->buffers[buf->index].seq;
1315         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1316         buf->length = cam->frame_size;
1317         buf->input = 0;
1318         buf->reserved = 0;
1319         memset(&buf->timecode, 0, sizeof(buf->timecode));
1320
1321         DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index,
1322             cam->buffers[buf->index].status, buf->sequence, buf->bytesused);
1323
1324         return 0;
1325 }
1326
1327 /******************************************************************************
1328  *
1329  *  cpia2_ioctl
1330  *
1331  *****************************************************************************/
1332 static long cpia2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
1333 {
1334         struct camera_data *cam = video_drvdata(file);
1335         long retval = 0;
1336
1337         if (!cam)
1338                 return -ENOTTY;
1339
1340         /* make this _really_ smp-safe */
1341         if (mutex_lock_interruptible(&cam->busy_lock))
1342                 return -ERESTARTSYS;
1343
1344         if (!cam->present) {
1345                 mutex_unlock(&cam->busy_lock);
1346                 return -ENODEV;
1347         }
1348
1349         /* Priority check */
1350         switch (cmd) {
1351         case VIDIOC_S_FMT:
1352         {
1353                 struct cpia2_fh *fh = file->private_data;
1354                 retval = v4l2_prio_check(&cam->prio, fh->prio);
1355                 if(retval) {
1356                         mutex_unlock(&cam->busy_lock);
1357                         return retval;
1358                 }
1359                 break;
1360         }
1361         default:
1362                 break;
1363         }
1364
1365         switch (cmd) {
1366         /* CPIA2 extension to Video4Linux API */
1367         case CPIA2_IOC_SET_GPIO:
1368                 retval = ioctl_set_gpio(arg, cam);
1369                 break;
1370         case VIDIOC_QUERYCAP:
1371                 retval = ioctl_querycap(arg,cam);
1372                 break;
1373
1374         case VIDIOC_ENUMINPUT:
1375         case VIDIOC_G_INPUT:
1376         case VIDIOC_S_INPUT:
1377                 retval = ioctl_input(cmd, arg, cam);
1378                 break;
1379
1380         case VIDIOC_ENUM_FMT:
1381                 retval = ioctl_enum_fmt(arg,cam);
1382                 break;
1383         case VIDIOC_TRY_FMT:
1384                 retval = ioctl_try_fmt(arg,cam);
1385                 break;
1386         case VIDIOC_G_FMT:
1387                 retval = ioctl_get_fmt(arg,cam);
1388                 break;
1389         case VIDIOC_S_FMT:
1390                 retval = ioctl_set_fmt(arg,cam,file->private_data);
1391                 break;
1392
1393         case VIDIOC_CROPCAP:
1394                 retval = ioctl_cropcap(arg,cam);
1395                 break;
1396         case VIDIOC_G_CROP:
1397         case VIDIOC_S_CROP:
1398                 // TODO: I think cropping can be implemented - SJB
1399                 retval = -EINVAL;
1400                 break;
1401
1402         case VIDIOC_QUERYCTRL:
1403                 retval = ioctl_queryctrl(arg,cam);
1404                 break;
1405         case VIDIOC_QUERYMENU:
1406                 retval = ioctl_querymenu(arg,cam);
1407                 break;
1408         case VIDIOC_G_CTRL:
1409                 retval = ioctl_g_ctrl(arg,cam);
1410                 break;
1411         case VIDIOC_S_CTRL:
1412                 retval = ioctl_s_ctrl(arg,cam);
1413                 break;
1414
1415         case VIDIOC_G_JPEGCOMP:
1416                 retval = ioctl_g_jpegcomp(arg,cam);
1417                 break;
1418         case VIDIOC_S_JPEGCOMP:
1419                 retval = ioctl_s_jpegcomp(arg,cam);
1420                 break;
1421
1422         case VIDIOC_G_PRIORITY:
1423         {
1424                 struct cpia2_fh *fh = file->private_data;
1425                 *(enum v4l2_priority*)arg = fh->prio;
1426                 break;
1427         }
1428         case VIDIOC_S_PRIORITY:
1429         {
1430                 struct cpia2_fh *fh = file->private_data;
1431                 enum v4l2_priority prio;
1432                 prio = *(enum v4l2_priority*)arg;
1433                 if(cam->streaming &&
1434                    prio != fh->prio &&
1435                    fh->prio == V4L2_PRIORITY_RECORD) {
1436                         /* Can't drop record priority while streaming */
1437                         retval = -EBUSY;
1438                 } else if(prio == V4L2_PRIORITY_RECORD &&
1439                    prio != fh->prio &&
1440                    v4l2_prio_max(&cam->prio) == V4L2_PRIORITY_RECORD) {
1441                         /* Only one program can record at a time */
1442                         retval = -EBUSY;
1443                 } else {
1444                         retval = v4l2_prio_change(&cam->prio, &fh->prio, prio);
1445                 }
1446                 break;
1447         }
1448
1449         case VIDIOC_REQBUFS:
1450                 retval = ioctl_reqbufs(arg,cam);
1451                 break;
1452         case VIDIOC_QUERYBUF:
1453                 retval = ioctl_querybuf(arg,cam);
1454                 break;
1455         case VIDIOC_QBUF:
1456                 retval = ioctl_qbuf(arg,cam);
1457                 break;
1458         case VIDIOC_DQBUF:
1459                 retval = ioctl_dqbuf(arg,cam,file);
1460                 break;
1461         case VIDIOC_STREAMON:
1462         {
1463                 int type;
1464                 DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming);
1465                 type = *(int*)arg;
1466                 if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1467                         retval = -EINVAL;
1468
1469                 if(!cam->streaming) {
1470                         retval = cpia2_usb_stream_start(cam,
1471                                           cam->params.camera_state.stream_mode);
1472                 } else {
1473                         retval = -EINVAL;
1474                 }
1475
1476                 break;
1477         }
1478         case VIDIOC_STREAMOFF:
1479         {
1480                 int type;
1481                 DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming);
1482                 type = *(int*)arg;
1483                 if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1484                         retval = -EINVAL;
1485
1486                 if(cam->streaming) {
1487                         retval = cpia2_usb_stream_stop(cam);
1488                 } else {
1489                         retval = -EINVAL;
1490                 }
1491
1492                 break;
1493         }
1494
1495         case VIDIOC_ENUMOUTPUT:
1496         case VIDIOC_G_OUTPUT:
1497         case VIDIOC_S_OUTPUT:
1498         case VIDIOC_G_MODULATOR:
1499         case VIDIOC_S_MODULATOR:
1500
1501         case VIDIOC_ENUMAUDIO:
1502         case VIDIOC_G_AUDIO:
1503         case VIDIOC_S_AUDIO:
1504
1505         case VIDIOC_ENUMAUDOUT:
1506         case VIDIOC_G_AUDOUT:
1507         case VIDIOC_S_AUDOUT:
1508
1509         case VIDIOC_ENUMSTD:
1510         case VIDIOC_QUERYSTD:
1511         case VIDIOC_G_STD:
1512         case VIDIOC_S_STD:
1513
1514         case VIDIOC_G_TUNER:
1515         case VIDIOC_S_TUNER:
1516         case VIDIOC_G_FREQUENCY:
1517         case VIDIOC_S_FREQUENCY:
1518
1519         case VIDIOC_OVERLAY:
1520         case VIDIOC_G_FBUF:
1521         case VIDIOC_S_FBUF:
1522
1523         case VIDIOC_G_PARM:
1524         case VIDIOC_S_PARM:
1525                 retval = -EINVAL;
1526                 break;
1527         default:
1528                 retval = -ENOIOCTLCMD;
1529                 break;
1530         }
1531
1532         mutex_unlock(&cam->busy_lock);
1533         return retval;
1534 }
1535
1536 static long cpia2_ioctl(struct file *file,
1537                        unsigned int cmd, unsigned long arg)
1538 {
1539         return video_usercopy(file, cmd, arg, cpia2_do_ioctl);
1540 }
1541
1542 /******************************************************************************
1543  *
1544  *  cpia2_mmap
1545  *
1546  *****************************************************************************/
1547 static int cpia2_mmap(struct file *file, struct vm_area_struct *area)
1548 {
1549         struct camera_data *cam = video_drvdata(file);
1550         int retval;
1551
1552         /* Priority check */
1553         struct cpia2_fh *fh = file->private_data;
1554         if(fh->prio != V4L2_PRIORITY_RECORD) {
1555                 return -EBUSY;
1556         }
1557
1558         retval = cpia2_remap_buffer(cam, area);
1559
1560         if(!retval)
1561                 fh->mmapped = 1;
1562         return retval;
1563 }
1564
1565 /******************************************************************************
1566  *
1567  *  reset_camera_struct_v4l
1568  *
1569  *  Sets all values to the defaults
1570  *****************************************************************************/
1571 static void reset_camera_struct_v4l(struct camera_data *cam)
1572 {
1573         cam->width = cam->params.roi.width;
1574         cam->height = cam->params.roi.height;
1575
1576         cam->frame_size = buffer_size;
1577         cam->num_frames = num_buffers;
1578
1579         /* FlickerModes */
1580         cam->params.flicker_control.flicker_mode_req = flicker_mode;
1581         cam->params.flicker_control.mains_frequency = flicker_freq;
1582
1583         /* streamMode */
1584         cam->params.camera_state.stream_mode = alternate;
1585
1586         cam->pixelformat = V4L2_PIX_FMT_JPEG;
1587         v4l2_prio_init(&cam->prio);
1588 }
1589
1590 /***
1591  * The v4l video device structure initialized for this device
1592  ***/
1593 static const struct v4l2_file_operations cpia2_fops = {
1594         .owner          = THIS_MODULE,
1595         .open           = cpia2_open,
1596         .release        = cpia2_close,
1597         .read           = cpia2_v4l_read,
1598         .poll           = cpia2_v4l_poll,
1599         .ioctl          = cpia2_ioctl,
1600         .mmap           = cpia2_mmap,
1601 };
1602
1603 static struct video_device cpia2_template = {
1604         /* I could not find any place for the old .initialize initializer?? */
1605         .name =         "CPiA2 Camera",
1606         .fops =         &cpia2_fops,
1607         .release =      video_device_release,
1608 };
1609
1610 /******************************************************************************
1611  *
1612  *  cpia2_register_camera
1613  *
1614  *****************************************************************************/
1615 int cpia2_register_camera(struct camera_data *cam)
1616 {
1617         cam->vdev = video_device_alloc();
1618         if(!cam->vdev)
1619                 return -ENOMEM;
1620
1621         memcpy(cam->vdev, &cpia2_template, sizeof(cpia2_template));
1622         video_set_drvdata(cam->vdev, cam);
1623
1624         reset_camera_struct_v4l(cam);
1625
1626         /* register v4l device */
1627         if (video_register_device(cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
1628                 ERR("video_register_device failed\n");
1629                 video_device_release(cam->vdev);
1630                 return -ENODEV;
1631         }
1632
1633         return 0;
1634 }
1635
1636 /******************************************************************************
1637  *
1638  *  cpia2_unregister_camera
1639  *
1640  *****************************************************************************/
1641 void cpia2_unregister_camera(struct camera_data *cam)
1642 {
1643         if (!cam->open_count) {
1644                 video_unregister_device(cam->vdev);
1645         } else {
1646                 LOG("%s removed while open, deferring "
1647                     "video_unregister_device\n",
1648                     video_device_node_name(cam->vdev));
1649         }
1650 }
1651
1652 /******************************************************************************
1653  *
1654  *  check_parameters
1655  *
1656  *  Make sure that all user-supplied parameters are sensible
1657  *****************************************************************************/
1658 static void __init check_parameters(void)
1659 {
1660         if(buffer_size < PAGE_SIZE) {
1661                 buffer_size = PAGE_SIZE;
1662                 LOG("buffer_size too small, setting to %d\n", buffer_size);
1663         } else if(buffer_size > 1024*1024) {
1664                 /* arbitrary upper limiit */
1665                 buffer_size = 1024*1024;
1666                 LOG("buffer_size ridiculously large, setting to %d\n",
1667                     buffer_size);
1668         } else {
1669                 buffer_size += PAGE_SIZE-1;
1670                 buffer_size &= ~(PAGE_SIZE-1);
1671         }
1672
1673         if(num_buffers < 1) {
1674                 num_buffers = 1;
1675                 LOG("num_buffers too small, setting to %d\n", num_buffers);
1676         } else if(num_buffers > VIDEO_MAX_FRAME) {
1677                 num_buffers = VIDEO_MAX_FRAME;
1678                 LOG("num_buffers too large, setting to %d\n", num_buffers);
1679         }
1680
1681         if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) {
1682                 alternate = DEFAULT_ALT;
1683                 LOG("alternate specified is invalid, using %d\n", alternate);
1684         }
1685
1686         if (flicker_mode != NEVER_FLICKER && flicker_mode != ANTI_FLICKER_ON) {
1687                 flicker_mode = NEVER_FLICKER;
1688                 LOG("Flicker mode specified is invalid, using %d\n",
1689                     flicker_mode);
1690         }
1691
1692         if (flicker_freq != FLICKER_50 && flicker_freq != FLICKER_60) {
1693                 flicker_freq = FLICKER_60;
1694                 LOG("Flicker mode specified is invalid, using %d\n",
1695                     flicker_freq);
1696         }
1697
1698         if(video_nr < -1 || video_nr > 64) {
1699                 video_nr = -1;
1700                 LOG("invalid video_nr specified, must be -1 to 64\n");
1701         }
1702
1703         DBG("Using %d buffers, each %d bytes, alternate=%d\n",
1704             num_buffers, buffer_size, alternate);
1705 }
1706
1707 /************   Module Stuff ***************/
1708
1709
1710 /******************************************************************************
1711  *
1712  * cpia2_init/module_init
1713  *
1714  *****************************************************************************/
1715 static int __init cpia2_init(void)
1716 {
1717         LOG("%s v%d.%d.%d\n",
1718             ABOUT, CPIA2_MAJ_VER, CPIA2_MIN_VER, CPIA2_PATCH_VER);
1719         check_parameters();
1720         cpia2_usb_init();
1721         return 0;
1722 }
1723
1724
1725 /******************************************************************************
1726  *
1727  * cpia2_exit/module_exit
1728  *
1729  *****************************************************************************/
1730 static void __exit cpia2_exit(void)
1731 {
1732         cpia2_usb_cleanup();
1733         schedule_timeout(2 * HZ);
1734 }
1735
1736 module_init(cpia2_init);
1737 module_exit(cpia2_exit);
1738