drivers/media/video/v4l1-compat.c

   1 /*
   2  *
   3  *      Video for Linux Two
   4  *      Backward Compatibility Layer
   5  *
   6  *      Support subroutines for providing V4L2 drivers with backward
   7  *      compatibility with applications using the old API.
   8  *
   9  *      This program is free software; you can redistribute it and/or
  10  *      modify it under the terms of the GNU General Public License
  11  *      as published by the Free Software Foundation; either version
  12  *      2 of the License, or (at your option) any later version.
  13  *
  14  * Author:      Bill Dirks <bdirks@pacbell.net>
  15  *              et al.
  16  *
  17  */
  18
  19
  20 #include <linux/init.h>
  21 #include <linux/module.h>
  22 #include <linux/moduleparam.h>
  23 #include <linux/types.h>
  24 #include <linux/kernel.h>
  25 #include <linux/sched.h>
  26 #include <linux/smp_lock.h>
  27 #include <linux/mm.h>
  28 #include <linux/fs.h>
  29 #include <linux/file.h>
  30 #include <linux/string.h>
  31 #include <linux/errno.h>
  32 #include <linux/slab.h>
  33 #include <linux/videodev.h>
  34 #include <media/v4l2-common.h>
  35
  36 #include <asm/uaccess.h>
  37 #include <asm/system.h>
  38 #include <asm/pgtable.h>
  39
  40 #ifdef CONFIG_KMOD
  41 #include <linux/kmod.h>
  42 #endif
  43
  44 static unsigned int debug  = 0;
  45 module_param(debug, int, 0644);
  46 MODULE_PARM_DESC(debug,"enable debug messages");
  47 MODULE_AUTHOR("Bill Dirks");
  48 MODULE_DESCRIPTION("v4l(1) compatibility layer for v4l2 drivers.");
  49 MODULE_LICENSE("GPL");
  50
  51 #define dprintk(fmt, arg...)    if (debug) \
  52         printk(KERN_DEBUG "v4l1-compat: " fmt , ## arg)
  53
  54 /*
  55  *      I O C T L   T R A N S L A T I O N
  56  *
  57  *      From here on down is the code for translating the numerous
  58  *      ioctl commands from the old API to the new API.
  59  */
  60
  61 static int
  62 get_v4l_control(struct inode            *inode,
  63                 struct file             *file,
  64                 int                     cid,
  65                 v4l2_kioctl             drv)
  66 {
  67         struct v4l2_queryctrl   qctrl2;
  68         struct v4l2_control     ctrl2;
  69         int                     err;
  70
  71         qctrl2.id = cid;
  72         err = drv(inode, file, VIDIOC_QUERYCTRL, &qctrl2);
  73         if (err < 0)
  74                 dprintk("VIDIOC_QUERYCTRL: %d\n",err);
  75         if (err == 0 &&
  76             !(qctrl2.flags & V4L2_CTRL_FLAG_DISABLED))
  77         {
  78                 ctrl2.id = qctrl2.id;
  79                 err = drv(inode, file, VIDIOC_G_CTRL, &ctrl2);
  80                 if (err < 0) {
  81                         dprintk("VIDIOC_G_CTRL: %d\n",err);
  82                         return 0;
  83                 }
  84                 return ((ctrl2.value - qctrl2.minimum) * 65535
  85                          + (qctrl2.maximum - qctrl2.minimum) / 2)
  86                         / (qctrl2.maximum - qctrl2.minimum);
  87         }
  88         return 0;
  89 }
  90
  91 static int
  92 set_v4l_control(struct inode            *inode,
  93                 struct file             *file,
  94                 int                     cid,
  95                 int                     value,
  96                 v4l2_kioctl             drv)
  97 {
  98         struct v4l2_queryctrl   qctrl2;
  99         struct v4l2_control     ctrl2;
 100         int                     err;
 101
 102         qctrl2.id = cid;
 103         err = drv(inode, file, VIDIOC_QUERYCTRL, &qctrl2);
 104         if (err < 0)
 105                 dprintk("VIDIOC_QUERYCTRL: %d\n",err);
 106         if (err == 0 &&
 107             !(qctrl2.flags & V4L2_CTRL_FLAG_DISABLED) &&
 108             !(qctrl2.flags & V4L2_CTRL_FLAG_GRABBED))
 109         {
 110                 if (value < 0)
 111                         value = 0;
 112                 if (value > 65535)
 113                         value = 65535;
 114                 if (value && qctrl2.type == V4L2_CTRL_TYPE_BOOLEAN)
 115                         value = 65535;
 116                 ctrl2.id = qctrl2.id;
 117                 ctrl2.value =
 118                         (value * (qctrl2.maximum - qctrl2.minimum)
 119                          + 32767)
 120                         / 65535;
 121                 ctrl2.value += qctrl2.minimum;
 122                 err = drv(inode, file, VIDIOC_S_CTRL, &ctrl2);
 123                 if (err < 0)
 124                         dprintk("VIDIOC_S_CTRL: %d\n",err);
 125         }
 126         return 0;
 127 }
 128
 129 /* ----------------------------------------------------------------- */
 130
 131 static int palette2pixelformat[] = {
 132         [VIDEO_PALETTE_GREY]    = V4L2_PIX_FMT_GREY,
 133         [VIDEO_PALETTE_RGB555]  = V4L2_PIX_FMT_RGB555,
 134         [VIDEO_PALETTE_RGB565]  = V4L2_PIX_FMT_RGB565,
 135         [VIDEO_PALETTE_RGB24]   = V4L2_PIX_FMT_BGR24,
 136         [VIDEO_PALETTE_RGB32]   = V4L2_PIX_FMT_BGR32,
 137         /* yuv packed pixel */
 138         [VIDEO_PALETTE_YUYV]    = V4L2_PIX_FMT_YUYV,
 139         [VIDEO_PALETTE_YUV422]  = V4L2_PIX_FMT_YUYV,
 140         [VIDEO_PALETTE_UYVY]    = V4L2_PIX_FMT_UYVY,
 141         /* yuv planar */
 142         [VIDEO_PALETTE_YUV410P] = V4L2_PIX_FMT_YUV410,
 143         [VIDEO_PALETTE_YUV420]  = V4L2_PIX_FMT_YUV420,
 144         [VIDEO_PALETTE_YUV420P] = V4L2_PIX_FMT_YUV420,
 145         [VIDEO_PALETTE_YUV411P] = V4L2_PIX_FMT_YUV411P,
 146         [VIDEO_PALETTE_YUV422P] = V4L2_PIX_FMT_YUV422P,
 147 };
 148
 149 static unsigned int
 150 palette_to_pixelformat(unsigned int palette)
 151 {
 152         if (palette < ARRAY_SIZE(palette2pixelformat))
 153                 return palette2pixelformat[palette];
 154         else
 155                 return 0;
 156 }
 157
 158 static unsigned int
 159 pixelformat_to_palette(int pixelformat)
 160 {
 161         int     palette = 0;
 162         switch (pixelformat)
 163         {
 164         case V4L2_PIX_FMT_GREY:
 165                 palette = VIDEO_PALETTE_GREY;
 166                 break;
 167         case V4L2_PIX_FMT_RGB555:
 168                 palette = VIDEO_PALETTE_RGB555;
 169                 break;
 170         case V4L2_PIX_FMT_RGB565:
 171                 palette = VIDEO_PALETTE_RGB565;
 172                 break;
 173         case V4L2_PIX_FMT_BGR24:
 174                 palette = VIDEO_PALETTE_RGB24;
 175                 break;
 176         case V4L2_PIX_FMT_BGR32:
 177                 palette = VIDEO_PALETTE_RGB32;
 178                 break;
 179         /* yuv packed pixel */
 180         case V4L2_PIX_FMT_YUYV:
 181                 palette = VIDEO_PALETTE_YUYV;
 182                 break;
 183         case V4L2_PIX_FMT_UYVY:
 184                 palette = VIDEO_PALETTE_UYVY;
 185                 break;
 186         /* yuv planar */
 187         case V4L2_PIX_FMT_YUV410:
 188                 palette = VIDEO_PALETTE_YUV420;
 189                 break;
 190         case V4L2_PIX_FMT_YUV420:
 191                 palette = VIDEO_PALETTE_YUV420;
 192                 break;
 193         case V4L2_PIX_FMT_YUV411P:
 194                 palette = VIDEO_PALETTE_YUV411P;
 195                 break;
 196         case V4L2_PIX_FMT_YUV422P:
 197                 palette = VIDEO_PALETTE_YUV422P;
 198                 break;
 199         }
 200         return palette;
 201 }
 202
 203 /* ----------------------------------------------------------------- */
 204
 205 static int poll_one(struct file *file)
 206 {
 207         int retval = 1;
 208         poll_table *table;
 209         struct poll_wqueues pwq;
 210
 211         poll_initwait(&pwq);
 212         table = &pwq.pt;
 213         for (;;) {
 214                 int mask;
 215                 set_current_state(TASK_INTERRUPTIBLE);
 216                 mask = file->f_op->poll(file, table);
 217                 if (mask & POLLIN)
 218                         break;
 219                 table = NULL;
 220                 if (signal_pending(current)) {
 221                         retval = -ERESTARTSYS;
 222                         break;
 223                 }
 224                 schedule();
 225         }
 226         set_current_state(TASK_RUNNING);
 227         poll_freewait(&pwq);
 228         return retval;
 229 }
 230
 231 static int count_inputs(struct inode         *inode,
 232                         struct file          *file,
 233                         v4l2_kioctl          drv)
 234 {
 235         struct v4l2_input input2;
 236         int i;
 237
 238         for (i = 0;; i++) {
 239                 memset(&input2,0,sizeof(input2));
 240                 input2.index = i;
 241                 if (0 != drv(inode,file,VIDIOC_ENUMINPUT, &input2))
 242                         break;
 243         }
 244         return i;
 245 }
 246
 247 static int check_size(struct inode         *inode,
 248                       struct file          *file,
 249                       v4l2_kioctl          drv,
 250                       int *maxw, int *maxh)
 251 {
 252         struct v4l2_fmtdesc desc2;
 253         struct v4l2_format  fmt2;
 254
 255         memset(&desc2,0,sizeof(desc2));
 256         memset(&fmt2,0,sizeof(fmt2));
 257
 258         desc2.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 259         if (0 != drv(inode,file,VIDIOC_ENUM_FMT, &desc2))
 260                 goto done;
 261
 262         fmt2.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 263         fmt2.fmt.pix.width       = 10000;
 264         fmt2.fmt.pix.height      = 10000;
 265         fmt2.fmt.pix.pixelformat = desc2.pixelformat;
 266         if (0 != drv(inode,file,VIDIOC_TRY_FMT, &fmt2))
 267                 goto done;
 268
 269         *maxw = fmt2.fmt.pix.width;
 270         *maxh = fmt2.fmt.pix.height;
 271
 272  done:
 273         return 0;
 274 }
 275
 276 /* ----------------------------------------------------------------- */
 277
 278 /*
 279  *      This function is exported.
 280  */
 281 int
 282 v4l_compat_translate_ioctl(struct inode         *inode,
 283                            struct file          *file,
 284                            int                  cmd,
 285                            void                 *arg,
 286                            v4l2_kioctl          drv)
 287 {
 288         struct v4l2_capability  *cap2 = NULL;
 289         struct v4l2_format      *fmt2 = NULL;
 290         enum v4l2_buf_type      captype = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 291
 292         struct v4l2_framebuffer fbuf2;
 293         struct v4l2_input       input2;
 294         struct v4l2_tuner       tun2;
 295         struct v4l2_standard    std2;
 296         struct v4l2_frequency   freq2;
 297         struct v4l2_audio       aud2;
 298         struct v4l2_queryctrl   qctrl2;
 299         struct v4l2_buffer      buf2;
 300         v4l2_std_id             sid;
 301         int i, err = 0;
 302
 303         switch (cmd) {
 304         case VIDIOCGCAP:        /* capability */
 305         {
 306                 struct video_capability *cap = arg;
 307
 308                 cap2 = kzalloc(sizeof(*cap2),GFP_KERNEL);
 309                 memset(cap, 0, sizeof(*cap));
 310                 memset(&fbuf2, 0, sizeof(fbuf2));
 311
 312                 err = drv(inode, file, VIDIOC_QUERYCAP, cap2);
 313                 if (err < 0) {
 314                         dprintk("VIDIOCGCAP / VIDIOC_QUERYCAP: %d\n",err);
 315                         break;
 316                 }
 317                 if (cap2->capabilities & V4L2_CAP_VIDEO_OVERLAY) {
 318                         err = drv(inode, file, VIDIOC_G_FBUF, &fbuf2);
 319                         if (err < 0) {
 320                                 dprintk("VIDIOCGCAP / VIDIOC_G_FBUF: %d\n",err);
 321                                 memset(&fbuf2, 0, sizeof(fbuf2));
 322                         }
 323                         err = 0;
 324                 }
 325
 326                 memcpy(cap->name, cap2->card,
 327                        min(sizeof(cap->name), sizeof(cap2->card)));
 328                 cap->name[sizeof(cap->name) - 1] = 0;
 329                 if (cap2->capabilities & V4L2_CAP_VIDEO_CAPTURE)
 330                         cap->type |= VID_TYPE_CAPTURE;
 331                 if (cap2->capabilities & V4L2_CAP_TUNER)
 332                         cap->type |= VID_TYPE_TUNER;
 333                 if (cap2->capabilities & V4L2_CAP_VBI_CAPTURE)
 334                         cap->type |= VID_TYPE_TELETEXT;
 335                 if (cap2->capabilities & V4L2_CAP_VIDEO_OVERLAY)
 336                         cap->type |= VID_TYPE_OVERLAY;
 337                 if (fbuf2.capability & V4L2_FBUF_CAP_LIST_CLIPPING)
 338                         cap->type |= VID_TYPE_CLIPPING;
 339
 340                 cap->channels  = count_inputs(inode,file,drv);
 341                 check_size(inode,file,drv,
 342                            &cap->maxwidth,&cap->maxheight);
 343                 cap->audios    =  0; /* FIXME */
 344                 cap->minwidth  = 48; /* FIXME */
 345                 cap->minheight = 32; /* FIXME */
 346                 break;
 347         }
 348         case VIDIOCGFBUF: /*  get frame buffer  */
 349         {
 350                 struct video_buffer     *buffer = arg;
 351
 352                 err = drv(inode, file, VIDIOC_G_FBUF, &fbuf2);
 353                 if (err < 0) {
 354                         dprintk("VIDIOCGFBUF / VIDIOC_G_FBUF: %d\n",err);
 355                         break;
 356                 }
 357                 buffer->base   = fbuf2.base;
 358                 buffer->height = fbuf2.fmt.height;
 359                 buffer->width  = fbuf2.fmt.width;
 360
 361                 switch (fbuf2.fmt.pixelformat) {
 362                 case V4L2_PIX_FMT_RGB332:
 363                         buffer->depth = 8;
 364                                 break;
 365                 case V4L2_PIX_FMT_RGB555:
 366                         buffer->depth = 15;
 367                         break;
 368                 case V4L2_PIX_FMT_RGB565:
 369                         buffer->depth = 16;
 370                         break;
 371                 case V4L2_PIX_FMT_BGR24:
 372                         buffer->depth = 24;
 373                         break;
 374                 case V4L2_PIX_FMT_BGR32:
 375                         buffer->depth = 32;
 376                         break;
 377                 default:
 378                         buffer->depth = 0;
 379                 }
 380                 if (0 != fbuf2.fmt.bytesperline)
 381                         buffer->bytesperline = fbuf2.fmt.bytesperline;
 382                 else {
 383                         buffer->bytesperline =
 384                                 (buffer->width * buffer->depth + 7) & 7;
 385                         buffer->bytesperline >>= 3;
 386                 }
 387                 break;
 388         }
 389         case VIDIOCSFBUF: /*  set frame buffer  */
 390         {
 391                 struct video_buffer     *buffer = arg;
 392
 393                 memset(&fbuf2, 0, sizeof(fbuf2));
 394                 fbuf2.base       = buffer->base;
 395                 fbuf2.fmt.height = buffer->height;
 396                 fbuf2.fmt.width  = buffer->width;
 397                 switch (buffer->depth) {
 398                 case 8:
 399                         fbuf2.fmt.pixelformat = V4L2_PIX_FMT_RGB332;
 400                         break;
 401                 case 15:
 402                         fbuf2.fmt.pixelformat = V4L2_PIX_FMT_RGB555;
 403                         break;
 404                 case 16:
 405                         fbuf2.fmt.pixelformat = V4L2_PIX_FMT_RGB565;
 406                         break;
 407                 case 24:
 408                         fbuf2.fmt.pixelformat = V4L2_PIX_FMT_BGR24;
 409                         break;
 410                 case 32:
 411                         fbuf2.fmt.pixelformat = V4L2_PIX_FMT_BGR32;
 412                         break;
 413                 }
 414                 fbuf2.fmt.bytesperline = buffer->bytesperline;
 415                 err = drv(inode, file, VIDIOC_S_FBUF, &fbuf2);
 416                 if (err < 0)
 417                         dprintk("VIDIOCSFBUF / VIDIOC_S_FBUF: %d\n",err);
 418                 break;
 419         }
 420         case VIDIOCGWIN: /*  get window or capture dimensions  */
 421         {
 422                 struct video_window     *win = arg;
 423
 424                 fmt2 = kzalloc(sizeof(*fmt2),GFP_KERNEL);
 425                 memset(win,0,sizeof(*win));
 426
 427                 fmt2->type = V4L2_BUF_TYPE_VIDEO_OVERLAY;
 428                 err = drv(inode, file, VIDIOC_G_FMT, fmt2);
 429                 if (err < 0)
 430                         dprintk("VIDIOCGWIN / VIDIOC_G_WIN: %d\n",err);
 431                 if (err == 0) {
 432                         win->x         = fmt2->fmt.win.w.left;
 433                         win->y         = fmt2->fmt.win.w.top;
 434                         win->width     = fmt2->fmt.win.w.width;
 435                         win->height    = fmt2->fmt.win.w.height;
 436                         win->chromakey = fmt2->fmt.win.chromakey;
 437                         win->clips     = NULL;
 438                         win->clipcount = 0;
 439                         break;
 440                 }
 441
 442                 fmt2->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 443                 err = drv(inode, file, VIDIOC_G_FMT, fmt2);
 444                 if (err < 0) {
 445                         dprintk("VIDIOCGWIN / VIDIOC_G_FMT: %d\n",err);
 446                         break;
 447                 }
 448                 win->x         = 0;
 449                 win->y         = 0;
 450                 win->width     = fmt2->fmt.pix.width;
 451                 win->height    = fmt2->fmt.pix.height;
 452                 win->chromakey = 0;
 453                 win->clips     = NULL;
 454                 win->clipcount = 0;
 455                 break;
 456         }
 457         case VIDIOCSWIN: /*  set window and/or capture dimensions  */
 458         {
 459                 struct video_window     *win = arg;
 460                 int err1,err2;
 461
 462                 fmt2 = kzalloc(sizeof(*fmt2),GFP_KERNEL);
 463                 fmt2->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 464                 drv(inode, file, VIDIOC_STREAMOFF, &fmt2->type);
 465                 err1 = drv(inode, file, VIDIOC_G_FMT, fmt2);
 466                 if (err1 < 0)
 467                         dprintk("VIDIOCSWIN / VIDIOC_G_FMT: %d\n",err);
 468                 if (err1 == 0) {
 469                         fmt2->fmt.pix.width  = win->width;
 470                         fmt2->fmt.pix.height = win->height;
 471                         fmt2->fmt.pix.field  = V4L2_FIELD_ANY;
 472                         fmt2->fmt.pix.bytesperline = 0;
 473                         err = drv(inode, file, VIDIOC_S_FMT, fmt2);
 474                         if (err < 0)
 475                                 dprintk("VIDIOCSWIN / VIDIOC_S_FMT #1: %d\n",
 476                                         err);
 477                         win->width  = fmt2->fmt.pix.width;
 478                         win->height = fmt2->fmt.pix.height;
 479                 }
 480
 481                 memset(fmt2,0,sizeof(*fmt2));
 482                 fmt2->type = V4L2_BUF_TYPE_VIDEO_OVERLAY;
 483                 fmt2->fmt.win.w.left    = win->x;
 484                 fmt2->fmt.win.w.top     = win->y;
 485                 fmt2->fmt.win.w.width   = win->width;
 486                 fmt2->fmt.win.w.height  = win->height;
 487                 fmt2->fmt.win.chromakey = win->chromakey;
 488                 fmt2->fmt.win.clips     = (void __user *)win->clips;
 489                 fmt2->fmt.win.clipcount = win->clipcount;
 490                 err2 = drv(inode, file, VIDIOC_S_FMT, fmt2);
 491                 if (err2 < 0)
 492                         dprintk("VIDIOCSWIN / VIDIOC_S_FMT #2: %d\n",err);
 493
 494                 if (err1 != 0 && err2 != 0)
 495                         err = err1;
 496                 break;
 497         }
 498         case VIDIOCCAPTURE: /*  turn on/off preview  */
 499         {
 500                 int *on = arg;
 501
 502                 if (0 == *on) {
 503                         /* dirty hack time.  But v4l1 has no STREAMOFF
 504                          * equivalent in the API, and this one at
 505                          * least comes close ... */
 506                         drv(inode, file, VIDIOC_STREAMOFF, &captype);
 507                 }
 508                 err = drv(inode, file, VIDIOC_OVERLAY, arg);
 509                 if (err < 0)
 510                         dprintk("VIDIOCCAPTURE / VIDIOC_PREVIEW: %d\n",err);
 511                 break;
 512         }
 513         case VIDIOCGCHAN: /*  get input information  */
 514         {
 515                 struct video_channel    *chan = arg;
 516
 517                 memset(&input2,0,sizeof(input2));
 518                 input2.index = chan->channel;
 519                 err = drv(inode, file, VIDIOC_ENUMINPUT, &input2);
 520                 if (err < 0) {
 521                         dprintk("VIDIOCGCHAN / VIDIOC_ENUMINPUT: "
 522                                 "channel=%d err=%d\n",chan->channel,err);
 523                         break;
 524                 }
 525                 chan->channel = input2.index;
 526                 memcpy(chan->name, input2.name,
 527                        min(sizeof(chan->name), sizeof(input2.name)));
 528                 chan->name[sizeof(chan->name) - 1] = 0;
 529                 chan->tuners = (input2.type == V4L2_INPUT_TYPE_TUNER) ? 1 : 0;
 530                 chan->flags = (chan->tuners) ? VIDEO_VC_TUNER : 0;
 531                 switch (input2.type) {
 532                 case V4L2_INPUT_TYPE_TUNER:
 533                         chan->type = VIDEO_TYPE_TV;
 534                         break;
 535                 default:
 536                 case V4L2_INPUT_TYPE_CAMERA:
 537                         chan->type = VIDEO_TYPE_CAMERA;
 538                         break;
 539                 }
 540                 chan->norm = 0;
 541                 err = drv(inode, file, VIDIOC_G_STD, &sid);
 542                 if (err < 0)
 543                         dprintk("VIDIOCGCHAN / VIDIOC_G_STD: %d\n",err);
 544                 if (err == 0) {
 545                         if (sid & V4L2_STD_PAL)
 546                                 chan->norm = VIDEO_MODE_PAL;
 547                         if (sid & V4L2_STD_NTSC)
 548                                 chan->norm = VIDEO_MODE_NTSC;
 549                         if (sid & V4L2_STD_SECAM)
 550                                 chan->norm = VIDEO_MODE_SECAM;
 551                 }
 552                 break;
 553         }
 554         case VIDIOCSCHAN: /*  set input  */
 555         {
 556                 struct video_channel *chan = arg;
 557
 558                 sid = 0;
 559                 err = drv(inode, file, VIDIOC_S_INPUT, &chan->channel);
 560                 if (err < 0)
 561                         dprintk("VIDIOCSCHAN / VIDIOC_S_INPUT: %d\n",err);
 562                 switch (chan->norm) {
 563                 case VIDEO_MODE_PAL:
 564                         sid = V4L2_STD_PAL;
 565                         break;
 566                 case VIDEO_MODE_NTSC:
 567                         sid = V4L2_STD_NTSC;
 568                         break;
 569                 case VIDEO_MODE_SECAM:
 570                         sid = V4L2_STD_SECAM;
 571                         break;
 572                 }
 573                 if (0 != sid) {
 574                         err = drv(inode, file, VIDIOC_S_STD, &sid);
 575                         if (err < 0)
 576                                 dprintk("VIDIOCSCHAN / VIDIOC_S_STD: %d\n",err);
 577                 }
 578                 break;
 579         }
 580         case VIDIOCGPICT: /*  get tone controls & partial capture format  */
 581         {
 582                 struct video_picture    *pict = arg;
 583
 584                 pict->brightness = get_v4l_control(inode, file,
 585                                                    V4L2_CID_BRIGHTNESS,drv);
 586                 pict->hue = get_v4l_control(inode, file,
 587                                             V4L2_CID_HUE, drv);
 588                 pict->contrast = get_v4l_control(inode, file,
 589                                                  V4L2_CID_CONTRAST, drv);
 590                 pict->colour = get_v4l_control(inode, file,
 591                                                V4L2_CID_SATURATION, drv);
 592                 pict->whiteness = get_v4l_control(inode, file,
 593                                                   V4L2_CID_WHITENESS, drv);
 594
 595                 fmt2 = kzalloc(sizeof(*fmt2),GFP_KERNEL);
 596                 fmt2->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 597                 err = drv(inode, file, VIDIOC_G_FMT, fmt2);
 598                 if (err < 0) {
 599                         dprintk("VIDIOCGPICT / VIDIOC_G_FMT: %d\n",err);
 600                         break;
 601                 }
 602                 pict->palette = pixelformat_to_palette(
 603                         fmt2->fmt.pix.pixelformat);
 604                 break;
 605         }
 606         case VIDIOCSPICT: /*  set tone controls & partial capture format  */
 607         {
 608                 struct video_picture    *pict = arg;
 609
 610                 set_v4l_control(inode, file,
 611                                 V4L2_CID_BRIGHTNESS, pict->brightness, drv);
 612                 set_v4l_control(inode, file,
 613                                 V4L2_CID_HUE, pict->hue, drv);
 614                 set_v4l_control(inode, file,
 615                                 V4L2_CID_CONTRAST, pict->contrast, drv);
 616                 set_v4l_control(inode, file,
 617                                 V4L2_CID_SATURATION, pict->colour, drv);
 618                 set_v4l_control(inode, file,
 619                                 V4L2_CID_WHITENESS, pict->whiteness, drv);
 620
 621                 fmt2 = kzalloc(sizeof(*fmt2),GFP_KERNEL);
 622                 fmt2->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 623                 err = drv(inode, file, VIDIOC_G_FMT, fmt2);
 624                 if (err < 0)
 625                         dprintk("VIDIOCSPICT / VIDIOC_G_FMT: %d\n",err);
 626                 if (fmt2->fmt.pix.pixelformat !=
 627                     palette_to_pixelformat(pict->palette)) {
 628                         fmt2->fmt.pix.pixelformat = palette_to_pixelformat(
 629                                 pict->palette);
 630                         err = drv(inode, file, VIDIOC_S_FMT, fmt2);
 631                         if (err < 0)
 632                                 dprintk("VIDIOCSPICT / VIDIOC_S_FMT: %d\n",err);
 633                 }
 634
 635                 err = drv(inode, file, VIDIOC_G_FBUF, &fbuf2);
 636                 if (err < 0)
 637                         dprintk("VIDIOCSPICT / VIDIOC_G_FBUF: %d\n",err);
 638                 if (fbuf2.fmt.pixelformat !=
 639                     palette_to_pixelformat(pict->palette)) {
 640                         fbuf2.fmt.pixelformat = palette_to_pixelformat(
 641                                 pict->palette);
 642                         err = drv(inode, file, VIDIOC_S_FBUF, &fbuf2);
 643                         if (err < 0)
 644                                 dprintk("VIDIOCSPICT / VIDIOC_S_FBUF: %d\n",err);
 645                         err = 0; /* likely fails for non-root */
 646                 }
 647                 break;
 648         }
 649         case VIDIOCGTUNER: /*  get tuner information  */
 650         {
 651                 struct video_tuner      *tun = arg;
 652
 653                 memset(&tun2,0,sizeof(tun2));
 654                 err = drv(inode, file, VIDIOC_G_TUNER, &tun2);
 655                 if (err < 0) {
 656                         dprintk("VIDIOCGTUNER / VIDIOC_G_TUNER: %d\n",err);
 657                         break;
 658                 }
 659                 memcpy(tun->name, tun2.name,
 660                        min(sizeof(tun->name), sizeof(tun2.name)));
 661                 tun->name[sizeof(tun->name) - 1] = 0;
 662                 tun->rangelow = tun2.rangelow;
 663                 tun->rangehigh = tun2.rangehigh;
 664                 tun->flags = 0;
 665                 tun->mode = VIDEO_MODE_AUTO;
 666
 667                 for (i = 0; i < 64; i++) {
 668                         memset(&std2,0,sizeof(std2));
 669                         std2.index = i;
 670                         if (0 != drv(inode, file, VIDIOC_ENUMSTD, &std2))
 671                                 break;
 672                         if (std2.id & V4L2_STD_PAL)
 673                                 tun->flags |= VIDEO_TUNER_PAL;
 674                         if (std2.id & V4L2_STD_NTSC)
 675                                 tun->flags |= VIDEO_TUNER_NTSC;
 676                         if (std2.id & V4L2_STD_SECAM)
 677                                 tun->flags |= VIDEO_TUNER_SECAM;
 678                 }
 679
 680                 err = drv(inode, file, VIDIOC_G_STD, &sid);
 681                 if (err < 0)
 682                         dprintk("VIDIOCGTUNER / VIDIOC_G_STD: %d\n",err);
 683                 if (err == 0) {
 684                         if (sid & V4L2_STD_PAL)
 685                                 tun->mode = VIDEO_MODE_PAL;
 686                         if (sid & V4L2_STD_NTSC)
 687                                 tun->mode = VIDEO_MODE_NTSC;
 688                         if (sid & V4L2_STD_SECAM)
 689                                 tun->mode = VIDEO_MODE_SECAM;
 690                 }
 691
 692                 if (tun2.capability & V4L2_TUNER_CAP_LOW)
 693                         tun->flags |= VIDEO_TUNER_LOW;
 694                 if (tun2.rxsubchans & V4L2_TUNER_SUB_STEREO)
 695                         tun->flags |= VIDEO_TUNER_STEREO_ON;
 696                 tun->signal = tun2.signal;
 697                 break;
 698         }
 699         case VIDIOCSTUNER: /*  select a tuner input  */
 700         {
 701                 err = 0;
 702                 break;
 703         }
 704         case VIDIOCGFREQ: /*  get frequency  */
 705         {
 706                 unsigned long *freq = arg;
 707
 708                 freq2.tuner = 0;
 709                 err = drv(inode, file, VIDIOC_G_FREQUENCY, &freq2);
 710                 if (err < 0)
 711                         dprintk("VIDIOCGFREQ / VIDIOC_G_FREQUENCY: %d\n",err);
 712                 if (0 == err)
 713                         *freq = freq2.frequency;
 714                 break;
 715         }
 716         case VIDIOCSFREQ: /*  set frequency  */
 717         {
 718                 unsigned long *freq = arg;
 719
 720                 freq2.tuner = 0;
 721                 drv(inode, file, VIDIOC_G_FREQUENCY, &freq2);
 722                 freq2.frequency = *freq;
 723                 err = drv(inode, file, VIDIOC_S_FREQUENCY, &freq2);
 724                 if (err < 0)
 725                         dprintk("VIDIOCSFREQ / VIDIOC_S_FREQUENCY: %d\n",err);
 726                 break;
 727         }
 728         case VIDIOCGAUDIO: /*  get audio properties/controls  */
 729         {
 730                 struct video_audio      *aud = arg;
 731
 732                 err = drv(inode, file, VIDIOC_G_AUDIO, &aud2);
 733                 if (err < 0) {
 734                         dprintk("VIDIOCGAUDIO / VIDIOC_G_AUDIO: %d\n",err);
 735                         break;
 736                 }
 737                 memcpy(aud->name, aud2.name,
 738                        min(sizeof(aud->name), sizeof(aud2.name)));
 739                 aud->name[sizeof(aud->name) - 1] = 0;
 740                 aud->audio = aud2.index;
 741                 aud->flags = 0;
 742                 i = get_v4l_control(inode, file, V4L2_CID_AUDIO_VOLUME, drv);
 743                 if (i >= 0) {
 744                         aud->volume = i;
 745                         aud->flags |= VIDEO_AUDIO_VOLUME;
 746                 }
 747                 i = get_v4l_control(inode, file, V4L2_CID_AUDIO_BASS, drv);
 748                 if (i >= 0) {
 749                         aud->bass = i;
 750                         aud->flags |= VIDEO_AUDIO_BASS;
 751                 }
 752                 i = get_v4l_control(inode, file, V4L2_CID_AUDIO_TREBLE, drv);
 753                 if (i >= 0) {
 754                         aud->treble = i;
 755                         aud->flags |= VIDEO_AUDIO_TREBLE;
 756                 }
 757                 i = get_v4l_control(inode, file, V4L2_CID_AUDIO_BALANCE, drv);
 758                 if (i >= 0) {
 759                         aud->balance = i;
 760                         aud->flags |= VIDEO_AUDIO_BALANCE;
 761                 }
 762                 i = get_v4l_control(inode, file, V4L2_CID_AUDIO_MUTE, drv);
 763                 if (i >= 0) {
 764                         if (i)
 765                                 aud->flags |= VIDEO_AUDIO_MUTE;
 766                         aud->flags |= VIDEO_AUDIO_MUTABLE;
 767                 }
 768                 aud->step = 1;
 769                 qctrl2.id = V4L2_CID_AUDIO_VOLUME;
 770                 if (drv(inode, file, VIDIOC_QUERYCTRL, &qctrl2) == 0 &&
 771                     !(qctrl2.flags & V4L2_CTRL_FLAG_DISABLED))
 772                         aud->step = qctrl2.step;
 773                 aud->mode = 0;
 774
 775                 memset(&tun2,0,sizeof(tun2));
 776                 err = drv(inode, file, VIDIOC_G_TUNER, &tun2);
 777                 if (err < 0) {
 778                         dprintk("VIDIOCGAUDIO / VIDIOC_G_TUNER: %d\n",err);
 779                         err = 0;
 780                         break;
 781                 }
 782
 783                 if (tun2.rxsubchans & V4L2_TUNER_SUB_LANG2)
 784                         aud->mode = VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
 785                 else if (tun2.rxsubchans & V4L2_TUNER_SUB_STEREO)
 786                         aud->mode = VIDEO_SOUND_STEREO;
 787                 else if (tun2.rxsubchans & V4L2_TUNER_SUB_MONO)
 788                         aud->mode = VIDEO_SOUND_MONO;
 789                 break;
 790         }
 791         case VIDIOCSAUDIO: /*  set audio controls  */
 792         {
 793                 struct video_audio      *aud = arg;
 794
 795                 memset(&aud2,0,sizeof(aud2));
 796                 memset(&tun2,0,sizeof(tun2));
 797
 798                 aud2.index = aud->audio;
 799                 err = drv(inode, file, VIDIOC_S_AUDIO, &aud2);
 800                 if (err < 0) {
 801                         dprintk("VIDIOCSAUDIO / VIDIOC_S_AUDIO: %d\n",err);
 802                         break;
 803                 }
 804
 805                 set_v4l_control(inode, file, V4L2_CID_AUDIO_VOLUME,
 806                                 aud->volume, drv);
 807                 set_v4l_control(inode, file, V4L2_CID_AUDIO_BASS,
 808                                 aud->bass, drv);
 809                 set_v4l_control(inode, file, V4L2_CID_AUDIO_TREBLE,
 810                                 aud->treble, drv);
 811                 set_v4l_control(inode, file, V4L2_CID_AUDIO_BALANCE,
 812                                 aud->balance, drv);
 813                 set_v4l_control(inode, file, V4L2_CID_AUDIO_MUTE,
 814                                 !!(aud->flags & VIDEO_AUDIO_MUTE), drv);
 815
 816                 err = drv(inode, file, VIDIOC_G_TUNER, &tun2);
 817                 if (err < 0)
 818                         dprintk("VIDIOCSAUDIO / VIDIOC_G_TUNER: %d\n",err);
 819                 if (err == 0) {
 820                         switch (aud->mode) {
 821                         default:
 822                         case VIDEO_SOUND_MONO:
 823                         case VIDEO_SOUND_LANG1:
 824                                 tun2.audmode = V4L2_TUNER_MODE_MONO;
 825                                 break;
 826                         case VIDEO_SOUND_STEREO:
 827                                 tun2.audmode = V4L2_TUNER_MODE_STEREO;
 828                                 break;
 829                         case VIDEO_SOUND_LANG2:
 830                                 tun2.audmode = V4L2_TUNER_MODE_LANG2;
 831                                 break;
 832                         }
 833                         err = drv(inode, file, VIDIOC_S_TUNER, &tun2);
 834                         if (err < 0)
 835                                 dprintk("VIDIOCSAUDIO / VIDIOC_S_TUNER: %d\n",err);
 836                 }
 837                 err = 0;
 838                 break;
 839         }
 840         case VIDIOCMCAPTURE: /*  capture a frame  */
 841         {
 842                 struct video_mmap       *mm = arg;
 843
 844                 fmt2 = kzalloc(sizeof(*fmt2),GFP_KERNEL);
 845                 memset(&buf2,0,sizeof(buf2));
 846
 847                 fmt2->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 848                 err = drv(inode, file, VIDIOC_G_FMT, fmt2);
 849                 if (err < 0) {
 850                         dprintk("VIDIOCMCAPTURE / VIDIOC_G_FMT: %d\n",err);
 851                         break;
 852                 }
 853                 if (mm->width   != fmt2->fmt.pix.width  ||
 854                     mm->height  != fmt2->fmt.pix.height ||
 855                     palette_to_pixelformat(mm->format) !=
 856                     fmt2->fmt.pix.pixelformat)
 857                 {/* New capture format...  */
 858                         fmt2->fmt.pix.width = mm->width;
 859                         fmt2->fmt.pix.height = mm->height;
 860                         fmt2->fmt.pix.pixelformat =
 861                                 palette_to_pixelformat(mm->format);
 862                         fmt2->fmt.pix.field = V4L2_FIELD_ANY;
 863                         fmt2->fmt.pix.bytesperline = 0;
 864                         err = drv(inode, file, VIDIOC_S_FMT, fmt2);
 865                         if (err < 0) {
 866                                 dprintk("VIDIOCMCAPTURE / VIDIOC_S_FMT: %d\n",err);
 867                                 break;
 868                         }
 869                 }
 870                 buf2.index = mm->frame;
 871                 buf2.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 872                 err = drv(inode, file, VIDIOC_QUERYBUF, &buf2);
 873                 if (err < 0) {
 874                         dprintk("VIDIOCMCAPTURE / VIDIOC_QUERYBUF: %d\n",err);
 875                         break;
 876                 }
 877                 err = drv(inode, file, VIDIOC_QBUF, &buf2);
 878                 if (err < 0) {
 879                         dprintk("VIDIOCMCAPTURE / VIDIOC_QBUF: %d\n",err);
 880                         break;
 881                 }
 882                 err = drv(inode, file, VIDIOC_STREAMON, &captype);
 883                 if (err < 0)
 884                         dprintk("VIDIOCMCAPTURE / VIDIOC_STREAMON: %d\n",err);
 885                 break;
 886         }
 887         case VIDIOCSYNC: /*  wait for a frame  */
 888         {
 889                 int                     *i = arg;
 890
 891                 buf2.index = *i;
 892                 buf2.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 893                 err = drv(inode, file, VIDIOC_QUERYBUF, &buf2);
 894                 if (err < 0) {
 895                         /*  No such buffer */
 896                         dprintk("VIDIOCSYNC / VIDIOC_QUERYBUF: %d\n",err);
 897                         break;
 898                 }
 899                 if (!(buf2.flags & V4L2_BUF_FLAG_MAPPED)) {
 900                         /* Buffer is not mapped  */
 901                         err = -EINVAL;
 902                         break;
 903                 }
 904
 905                 /* make sure capture actually runs so we don't block forever */
 906                 err = drv(inode, file, VIDIOC_STREAMON, &captype);
 907                 if (err < 0) {
 908                         dprintk("VIDIOCSYNC / VIDIOC_STREAMON: %d\n",err);
 909                         break;
 910                 }
 911
 912                 /*  Loop as long as the buffer is queued, but not done  */
 913                 while ((buf2.flags &
 914                         (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE))
 915                        == V4L2_BUF_FLAG_QUEUED)
 916                 {
 917                         err = poll_one(file);
 918                         if (err < 0 ||  /* error or sleep was interrupted  */
 919                             err == 0)   /* timeout? Shouldn't occur.  */
 920                                 break;
 921                         err = drv(inode, file, VIDIOC_QUERYBUF, &buf2);
 922                         if (err < 0)
 923                                 dprintk("VIDIOCSYNC / VIDIOC_QUERYBUF: %d\n",err);
 924                 }
 925                 if (!(buf2.flags & V4L2_BUF_FLAG_DONE)) /* not done */
 926                         break;
 927                 do {
 928                         err = drv(inode, file, VIDIOC_DQBUF, &buf2);
 929                         if (err < 0)
 930                                 dprintk("VIDIOCSYNC / VIDIOC_DQBUF: %d\n",err);
 931                 } while (err == 0 && buf2.index != *i);
 932                 break;
 933         }
 934
 935         case VIDIOCGVBIFMT: /* query VBI data capture format */
 936         {
 937                 struct vbi_format      *fmt = arg;
 938
 939                 fmt2 = kzalloc(sizeof(*fmt2),GFP_KERNEL);
 940                 fmt2->type = V4L2_BUF_TYPE_VBI_CAPTURE;
 941
 942                 err = drv(inode, file, VIDIOC_G_FMT, fmt2);
 943                 if (err < 0) {
 944                         dprintk("VIDIOCGVBIFMT / VIDIOC_G_FMT: %d\n", err);
 945                         break;
 946                 }
 947                 if (fmt2->fmt.vbi.sample_format != V4L2_PIX_FMT_GREY) {
 948                         err = -EINVAL;
 949                         break;
 950                 }
 951                 memset(fmt, 0, sizeof(*fmt));
 952                 fmt->samples_per_line = fmt2->fmt.vbi.samples_per_line;
 953                 fmt->sampling_rate    = fmt2->fmt.vbi.sampling_rate;
 954                 fmt->sample_format    = VIDEO_PALETTE_RAW;
 955                 fmt->start[0]         = fmt2->fmt.vbi.start[0];
 956                 fmt->count[0]         = fmt2->fmt.vbi.count[0];
 957                 fmt->start[1]         = fmt2->fmt.vbi.start[1];
 958                 fmt->count[1]         = fmt2->fmt.vbi.count[1];
 959                 fmt->flags            = fmt2->fmt.vbi.flags & 0x03;
 960                 break;
 961         }
 962         case VIDIOCSVBIFMT:
 963         {
 964                 struct vbi_format      *fmt = arg;
 965
 966                 if (VIDEO_PALETTE_RAW != fmt->sample_format) {
 967                         err = -EINVAL;
 968                         break;
 969                 }
 970
 971                 fmt2 = kzalloc(sizeof(*fmt2),GFP_KERNEL);
 972
 973                 fmt2->type = V4L2_BUF_TYPE_VBI_CAPTURE;
 974                 fmt2->fmt.vbi.samples_per_line = fmt->samples_per_line;
 975                 fmt2->fmt.vbi.sampling_rate    = fmt->sampling_rate;
 976                 fmt2->fmt.vbi.sample_format    = V4L2_PIX_FMT_GREY;
 977                 fmt2->fmt.vbi.start[0]         = fmt->start[0];
 978                 fmt2->fmt.vbi.count[0]         = fmt->count[0];
 979                 fmt2->fmt.vbi.start[1]         = fmt->start[1];
 980                 fmt2->fmt.vbi.count[1]         = fmt->count[1];
 981                 fmt2->fmt.vbi.flags            = fmt->flags;
 982                 err = drv(inode, file, VIDIOC_TRY_FMT, fmt2);
 983                 if (err < 0) {
 984                         dprintk("VIDIOCSVBIFMT / VIDIOC_TRY_FMT: %d\n", err);
 985                         break;
 986                 }
 987
 988                 if (fmt2->fmt.vbi.samples_per_line != fmt->samples_per_line ||
 989                     fmt2->fmt.vbi.sampling_rate    != fmt->sampling_rate    ||
 990                     fmt2->fmt.vbi.sample_format    != V4L2_PIX_FMT_GREY     ||
 991                     fmt2->fmt.vbi.start[0]         != fmt->start[0]         ||
 992                     fmt2->fmt.vbi.count[0]         != fmt->count[0]         ||
 993                     fmt2->fmt.vbi.start[1]         != fmt->start[1]         ||
 994                     fmt2->fmt.vbi.count[1]         != fmt->count[1]         ||
 995                     fmt2->fmt.vbi.flags            != fmt->flags) {
 996                         err = -EINVAL;
 997                         break;
 998                 }
 999                 err = drv(inode, file, VIDIOC_S_FMT, fmt2);
1000                 if (err < 0)
1001                         dprintk("VIDIOCSVBIFMT / VIDIOC_S_FMT: %d\n", err);
1002                 break;
1003         }
1004
1005         default:
1006                 err = -ENOIOCTLCMD;
1007                 break;
1008         }
1009
1010         kfree(cap2);
1011         kfree(fmt2);
1012         return err;
1013 }
1014
1015 EXPORT_SYMBOL(v4l_compat_translate_ioctl);
1016
1017 /*
1018  * Local variables:
1019  * c-basic-offset: 8
1020  * End:
1021  */