git.oblomov.eu Git - linux-2.6/blob - drivers/media/common/saa7146_video.c

   1 #include <media/saa7146_vv.h>
   2
   3 static int max_memory = 32;
   4
   5 module_param(max_memory, int, 0644);
   6 MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)");
   7
   8 #define IS_CAPTURE_ACTIVE(fh) \
   9         (((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh))
  10
  11 #define IS_OVERLAY_ACTIVE(fh) \
  12         (((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh))
  13
  14 /* format descriptions for capture and preview */
  15 static struct saa7146_format formats[] = {
  16         {
  17                 .name           = "RGB-8 (3-3-2)",
  18                 .pixelformat    = V4L2_PIX_FMT_RGB332,
  19                 .trans          = RGB08_COMPOSED,
  20                 .depth          = 8,
  21                 .flags          = 0,
  22         }, {
  23                 .name           = "RGB-16 (5/B-6/G-5/R)",
  24                 .pixelformat    = V4L2_PIX_FMT_RGB565,
  25                 .trans          = RGB16_COMPOSED,
  26                 .depth          = 16,
  27                 .flags          = 0,
  28         }, {
  29                 .name           = "RGB-24 (B-G-R)",
  30                 .pixelformat    = V4L2_PIX_FMT_BGR24,
  31                 .trans          = RGB24_COMPOSED,
  32                 .depth          = 24,
  33                 .flags          = 0,
  34         }, {
  35                 .name           = "RGB-32 (B-G-R)",
  36                 .pixelformat    = V4L2_PIX_FMT_BGR32,
  37                 .trans          = RGB32_COMPOSED,
  38                 .depth          = 32,
  39                 .flags          = 0,
  40         }, {
  41                 .name           = "RGB-32 (R-G-B)",
  42                 .pixelformat    = V4L2_PIX_FMT_RGB32,
  43                 .trans          = RGB32_COMPOSED,
  44                 .depth          = 32,
  45                 .flags          = 0,
  46                 .swap           = 0x2,
  47         }, {
  48                 .name           = "Greyscale-8",
  49                 .pixelformat    = V4L2_PIX_FMT_GREY,
  50                 .trans          = Y8,
  51                 .depth          = 8,
  52                 .flags          = 0,
  53         }, {
  54                 .name           = "YUV 4:2:2 planar (Y-Cb-Cr)",
  55                 .pixelformat    = V4L2_PIX_FMT_YUV422P,
  56                 .trans          = YUV422_DECOMPOSED,
  57                 .depth          = 16,
  58                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
  59         }, {
  60                 .name           = "YVU 4:2:0 planar (Y-Cb-Cr)",
  61                 .pixelformat    = V4L2_PIX_FMT_YVU420,
  62                 .trans          = YUV420_DECOMPOSED,
  63                 .depth          = 12,
  64                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
  65         }, {
  66                 .name           = "YUV 4:2:0 planar (Y-Cb-Cr)",
  67                 .pixelformat    = V4L2_PIX_FMT_YUV420,
  68                 .trans          = YUV420_DECOMPOSED,
  69                 .depth          = 12,
  70                 .flags          = FORMAT_IS_PLANAR,
  71         }, {
  72                 .name           = "YUV 4:2:2 (U-Y-V-Y)",
  73                 .pixelformat    = V4L2_PIX_FMT_UYVY,
  74                 .trans          = YUV422_COMPOSED,
  75                 .depth          = 16,
  76                 .flags          = 0,
  77         }
  78 };
  79
  80 /* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps.
  81    due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped
  82    (like V4L2_PIX_FMT_YUYV) ... 8-( */
  83
  84 static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
  85
  86 struct saa7146_format* format_by_fourcc(struct saa7146_dev *dev, int fourcc)
  87 {
  88         int i, j = NUM_FORMATS;
  89
  90         for (i = 0; i < j; i++) {
  91                 if (formats[i].pixelformat == fourcc) {
  92                         return formats+i;
  93                 }
  94         }
  95
  96         DEB_D(("unknown pixelformat:'%4.4s'\n",(char *)&fourcc));
  97         return NULL;
  98 }
  99
 100 static int g_fmt(struct saa7146_fh *fh, struct v4l2_format *f)
 101 {
 102         struct saa7146_dev *dev = fh->dev;
 103         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
 104
 105         switch (f->type) {
 106         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 107                 f->fmt.pix = fh->video_fmt;
 108                 return 0;
 109         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 110                 f->fmt.win = fh->ov.win;
 111                 return 0;
 112         case V4L2_BUF_TYPE_VBI_CAPTURE:
 113         {
 114                 f->fmt.vbi = fh->vbi_fmt;
 115                 return 0;
 116         }
 117         default:
 118                 DEB_D(("invalid format type '%d'.\n",f->type));
 119                 return -EINVAL;
 120         }
 121 }
 122
 123 static int try_win(struct saa7146_dev *dev, struct v4l2_window *win)
 124 {
 125         struct saa7146_vv *vv = dev->vv_data;
 126         enum v4l2_field field;
 127         int maxw, maxh;
 128
 129         DEB_EE(("dev:%p\n",dev));
 130
 131         if (NULL == vv->ov_fb.base) {
 132                 DEB_D(("no fb base set.\n"));
 133                 return -EINVAL;
 134         }
 135         if (NULL == vv->ov_fmt) {
 136                 DEB_D(("no fb fmt set.\n"));
 137                 return -EINVAL;
 138         }
 139         if (win->w.width < 48 || win->w.height <  32) {
 140                 DEB_D(("min width/height. (%d,%d)\n",win->w.width,win->w.height));
 141                 return -EINVAL;
 142         }
 143         if (win->clipcount > 16) {
 144                 DEB_D(("clipcount too big.\n"));
 145                 return -EINVAL;
 146         }
 147
 148         field = win->field;
 149         maxw  = vv->standard->h_max_out;
 150         maxh  = vv->standard->v_max_out;
 151
 152         if (V4L2_FIELD_ANY == field) {
 153                 field = (win->w.height > maxh/2)
 154                         ? V4L2_FIELD_INTERLACED
 155                         : V4L2_FIELD_TOP;
 156                 }
 157         switch (field) {
 158         case V4L2_FIELD_TOP:
 159         case V4L2_FIELD_BOTTOM:
 160         case V4L2_FIELD_ALTERNATE:
 161                 maxh = maxh / 2;
 162                 break;
 163         case V4L2_FIELD_INTERLACED:
 164                 break;
 165         default: {
 166                 DEB_D(("no known field mode '%d'.\n",field));
 167                 return -EINVAL;
 168         }
 169         }
 170
 171         win->field = field;
 172         if (win->w.width > maxw)
 173                 win->w.width = maxw;
 174         if (win->w.height > maxh)
 175                 win->w.height = maxh;
 176
 177         return 0;
 178 }
 179
 180 static int try_fmt(struct saa7146_fh *fh, struct v4l2_format *f)
 181 {
 182         struct saa7146_dev *dev = fh->dev;
 183         struct saa7146_vv *vv = dev->vv_data;
 184         int err;
 185
 186         switch (f->type) {
 187         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 188         {
 189                 struct saa7146_format *fmt;
 190                 enum v4l2_field field;
 191                 int maxw, maxh;
 192                 int calc_bpl;
 193
 194                 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n",dev,fh));
 195
 196                 fmt = format_by_fourcc(dev,f->fmt.pix.pixelformat);
 197                 if (NULL == fmt) {
 198                         return -EINVAL;
 199                 }
 200
 201                 field = f->fmt.pix.field;
 202                 maxw  = vv->standard->h_max_out;
 203                 maxh  = vv->standard->v_max_out;
 204
 205                 if (V4L2_FIELD_ANY == field) {
 206                         field = (f->fmt.pix.height > maxh/2)
 207                                 ? V4L2_FIELD_INTERLACED
 208                                 : V4L2_FIELD_BOTTOM;
 209                 }
 210                 switch (field) {
 211                 case V4L2_FIELD_ALTERNATE: {
 212                         vv->last_field = V4L2_FIELD_TOP;
 213                         maxh = maxh / 2;
 214                         break;
 215                 }
 216                 case V4L2_FIELD_TOP:
 217                 case V4L2_FIELD_BOTTOM:
 218                         vv->last_field = V4L2_FIELD_INTERLACED;
 219                         maxh = maxh / 2;
 220                         break;
 221                 case V4L2_FIELD_INTERLACED:
 222                         vv->last_field = V4L2_FIELD_INTERLACED;
 223                         break;
 224                 default: {
 225                         DEB_D(("no known field mode '%d'.\n",field));
 226                         return -EINVAL;
 227                 }
 228                 }
 229
 230                 f->fmt.pix.field = field;
 231                 if (f->fmt.pix.width > maxw)
 232                         f->fmt.pix.width = maxw;
 233                 if (f->fmt.pix.height > maxh)
 234                         f->fmt.pix.height = maxh;
 235
 236                 calc_bpl = (f->fmt.pix.width * fmt->depth)/8;
 237
 238                 if (f->fmt.pix.bytesperline < calc_bpl)
 239                         f->fmt.pix.bytesperline = calc_bpl;
 240
 241                 if (f->fmt.pix.bytesperline > (2*PAGE_SIZE * fmt->depth)/8) /* arbitrary constraint */
 242                         f->fmt.pix.bytesperline = calc_bpl;
 243
 244                 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
 245                 DEB_D(("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n",f->fmt.pix.width,f->fmt.pix.height,f->fmt.pix.bytesperline,f->fmt.pix.sizeimage));
 246
 247                 return 0;
 248         }
 249         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 250                 DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n",dev,fh));
 251                 err = try_win(dev,&f->fmt.win);
 252                 if (0 != err) {
 253                         return err;
 254                 }
 255                 return 0;
 256         default:
 257                 DEB_EE(("unknown format type '%d'\n",f->type));
 258                 return -EINVAL;
 259         }
 260 }
 261
 262 int saa7146_start_preview(struct saa7146_fh *fh)
 263 {
 264         struct saa7146_dev *dev = fh->dev;
 265         struct saa7146_vv *vv = dev->vv_data;
 266         int ret = 0, err = 0;
 267
 268         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
 269
 270         /* check if we have overlay informations */
 271         if( NULL == fh->ov.fh ) {
 272                 DEB_D(("no overlay data available. try S_FMT first.\n"));
 273                 return -EAGAIN;
 274         }
 275
 276         /* check if streaming capture is running */
 277         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 278                 DEB_D(("streaming capture is active.\n"));
 279                 return -EBUSY;
 280         }
 281
 282         /* check if overlay is running */
 283         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 284                 if (vv->video_fh == fh) {
 285                         DEB_D(("overlay is already active.\n"));
 286                         return 0;
 287                 }
 288                 DEB_D(("overlay is already active in another open.\n"));
 289                 return -EBUSY;
 290         }
 291
 292         if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
 293                 DEB_D(("cannot get necessary overlay resources\n"));
 294                 return -EBUSY;
 295         }
 296
 297         err = try_win(dev,&fh->ov.win);
 298         if (0 != err) {
 299                 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 300                 return -EBUSY;
 301         }
 302
 303         vv->ov_data = &fh->ov;
 304
 305         DEB_D(("%dx%d+%d+%d %s field=%s\n",
 306                 fh->ov.win.w.width,fh->ov.win.w.height,
 307                 fh->ov.win.w.left,fh->ov.win.w.top,
 308                 vv->ov_fmt->name,v4l2_field_names[fh->ov.win.field]));
 309
 310         if (0 != (ret = saa7146_enable_overlay(fh))) {
 311                 DEB_D(("enabling overlay failed: %d\n",ret));
 312                 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 313                 return ret;
 314         }
 315
 316         vv->video_status = STATUS_OVERLAY;
 317         vv->video_fh = fh;
 318
 319         return 0;
 320 }
 321
 322 int saa7146_stop_preview(struct saa7146_fh *fh)
 323 {
 324         struct saa7146_dev *dev = fh->dev;
 325         struct saa7146_vv *vv = dev->vv_data;
 326
 327         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
 328
 329         /* check if streaming capture is running */
 330         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 331                 DEB_D(("streaming capture is active.\n"));
 332                 return -EBUSY;
 333         }
 334
 335         /* check if overlay is running at all */
 336         if ((vv->video_status & STATUS_OVERLAY) == 0) {
 337                 DEB_D(("no active overlay.\n"));
 338                 return 0;
 339         }
 340
 341         if (vv->video_fh != fh) {
 342                 DEB_D(("overlay is active, but in another open.\n"));
 343                 return -EBUSY;
 344         }
 345
 346         vv->video_status = 0;
 347         vv->video_fh = NULL;
 348
 349         saa7146_disable_overlay(fh);
 350
 351         saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 352
 353         return 0;
 354 }
 355
 356 static int s_fmt(struct saa7146_fh *fh, struct v4l2_format *f)
 357 {
 358         struct saa7146_dev *dev = fh->dev;
 359         struct saa7146_vv *vv = dev->vv_data;
 360
 361         int err;
 362
 363         switch (f->type) {
 364         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 365                 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n",dev,fh));
 366                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
 367                         DEB_EE(("streaming capture is active\n"));
 368                         return -EBUSY;
 369                 }
 370                 err = try_fmt(fh,f);
 371                 if (0 != err)
 372                         return err;
 373                 fh->video_fmt = f->fmt.pix;
 374                 DEB_EE(("set to pixelformat '%4.4s'\n",(char *)&fh->video_fmt.pixelformat));
 375                 return 0;
 376         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 377                 DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n",dev,fh));
 378                 err = try_win(dev,&f->fmt.win);
 379                 if (0 != err)
 380                         return err;
 381                 down(&dev->lock);
 382                 fh->ov.win    = f->fmt.win;
 383                 fh->ov.nclips = f->fmt.win.clipcount;
 384                 if (fh->ov.nclips > 16)
 385                         fh->ov.nclips = 16;
 386                 if (copy_from_user(fh->ov.clips,f->fmt.win.clips,sizeof(struct v4l2_clip)*fh->ov.nclips)) {
 387                         up(&dev->lock);
 388                         return -EFAULT;
 389                 }
 390
 391                 /* fh->ov.fh is used to indicate that we have valid overlay informations, too */
 392                 fh->ov.fh = fh;
 393
 394                 up(&dev->lock);
 395
 396                 /* check if our current overlay is active */
 397                 if (IS_OVERLAY_ACTIVE(fh) != 0) {
 398                         saa7146_stop_preview(fh);
 399                         saa7146_start_preview(fh);
 400                 }
 401                 return 0;
 402         default:
 403                 DEB_D(("unknown format type '%d'\n",f->type));
 404                 return -EINVAL;
 405         }
 406 }
 407
 408 /********************************************************************************/
 409 /* device controls */
 410
 411 static struct v4l2_queryctrl controls[] = {
 412         {
 413                 .id             = V4L2_CID_BRIGHTNESS,
 414                 .name           = "Brightness",
 415                 .minimum        = 0,
 416                 .maximum        = 255,
 417                 .step           = 1,
 418                 .default_value  = 128,
 419                 .type           = V4L2_CTRL_TYPE_INTEGER,
 420         },{
 421                 .id             = V4L2_CID_CONTRAST,
 422                 .name           = "Contrast",
 423                 .minimum        = 0,
 424                 .maximum        = 127,
 425                 .step           = 1,
 426                 .default_value  = 64,
 427                 .type           = V4L2_CTRL_TYPE_INTEGER,
 428         },{
 429                 .id             = V4L2_CID_SATURATION,
 430                 .name           = "Saturation",
 431                 .minimum        = 0,
 432                 .maximum        = 127,
 433                 .step           = 1,
 434                 .default_value  = 64,
 435                 .type           = V4L2_CTRL_TYPE_INTEGER,
 436         },{
 437                 .id             = V4L2_CID_VFLIP,
 438                 .name           = "Vertical flip",
 439                 .minimum        = 0,
 440                 .maximum        = 1,
 441                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
 442         },{
 443                 .id             = V4L2_CID_HFLIP,
 444                 .name           = "Horizontal flip",
 445                 .minimum        = 0,
 446                 .maximum        = 1,
 447                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
 448         },
 449 };
 450 static int NUM_CONTROLS = sizeof(controls)/sizeof(struct v4l2_queryctrl);
 451
 452 #define V4L2_CID_PRIVATE_LASTP1      (V4L2_CID_PRIVATE_BASE + 0)
 453
 454 static struct v4l2_queryctrl* ctrl_by_id(int id)
 455 {
 456         int i;
 457
 458         for (i = 0; i < NUM_CONTROLS; i++)
 459                 if (controls[i].id == id)
 460                         return controls+i;
 461         return NULL;
 462 }
 463
 464 static int get_control(struct saa7146_fh *fh, struct v4l2_control *c)
 465 {
 466         struct saa7146_dev *dev = fh->dev;
 467         struct saa7146_vv *vv = dev->vv_data;
 468
 469         const struct v4l2_queryctrl* ctrl;
 470         u32 value = 0;
 471
 472         ctrl = ctrl_by_id(c->id);
 473         if (NULL == ctrl)
 474                 return -EINVAL;
 475         switch (c->id) {
 476         case V4L2_CID_BRIGHTNESS:
 477                 value = saa7146_read(dev, BCS_CTRL);
 478                 c->value = 0xff & (value >> 24);
 479                 DEB_D(("V4L2_CID_BRIGHTNESS: %d\n",c->value));
 480                 break;
 481         case V4L2_CID_CONTRAST:
 482                 value = saa7146_read(dev, BCS_CTRL);
 483                 c->value = 0x7f & (value >> 16);
 484                 DEB_D(("V4L2_CID_CONTRAST: %d\n",c->value));
 485                 break;
 486         case V4L2_CID_SATURATION:
 487                 value = saa7146_read(dev, BCS_CTRL);
 488                 c->value = 0x7f & (value >> 0);
 489                 DEB_D(("V4L2_CID_SATURATION: %d\n",c->value));
 490                 break;
 491         case V4L2_CID_VFLIP:
 492                 c->value = vv->vflip;
 493                 DEB_D(("V4L2_CID_VFLIP: %d\n",c->value));
 494                 break;
 495         case V4L2_CID_HFLIP:
 496                 c->value = vv->hflip;
 497                 DEB_D(("V4L2_CID_HFLIP: %d\n",c->value));
 498                 break;
 499         default:
 500                 return -EINVAL;
 501         }
 502
 503         return 0;
 504 }
 505
 506 static int set_control(struct saa7146_fh *fh, struct v4l2_control *c)
 507 {
 508         struct saa7146_dev *dev = fh->dev;
 509         struct saa7146_vv *vv = dev->vv_data;
 510
 511         const struct v4l2_queryctrl* ctrl;
 512
 513         ctrl = ctrl_by_id(c->id);
 514         if (NULL == ctrl) {
 515                 DEB_D(("unknown control %d\n",c->id));
 516                 return -EINVAL;
 517         }
 518
 519         down(&dev->lock);
 520
 521         switch (ctrl->type) {
 522         case V4L2_CTRL_TYPE_BOOLEAN:
 523         case V4L2_CTRL_TYPE_MENU:
 524         case V4L2_CTRL_TYPE_INTEGER:
 525                 if (c->value < ctrl->minimum)
 526                         c->value = ctrl->minimum;
 527                 if (c->value > ctrl->maximum)
 528                         c->value = ctrl->maximum;
 529                 break;
 530         default:
 531                 /* nothing */;
 532         };
 533
 534         switch (c->id) {
 535         case V4L2_CID_BRIGHTNESS: {
 536                 u32 value = saa7146_read(dev, BCS_CTRL);
 537                 value &= 0x00ffffff;
 538                 value |= (c->value << 24);
 539                 saa7146_write(dev, BCS_CTRL, value);
 540                 saa7146_write(dev, MC2, MASK_22 | MASK_06 );
 541                 break;
 542         }
 543         case V4L2_CID_CONTRAST: {
 544                 u32 value = saa7146_read(dev, BCS_CTRL);
 545                 value &= 0xff00ffff;
 546                 value |= (c->value << 16);
 547                 saa7146_write(dev, BCS_CTRL, value);
 548                 saa7146_write(dev, MC2, MASK_22 | MASK_06 );
 549                 break;
 550         }
 551         case V4L2_CID_SATURATION: {
 552                 u32 value = saa7146_read(dev, BCS_CTRL);
 553                 value &= 0xffffff00;
 554                 value |= (c->value << 0);
 555                 saa7146_write(dev, BCS_CTRL, value);
 556                 saa7146_write(dev, MC2, MASK_22 | MASK_06 );
 557                 break;
 558         }
 559         case V4L2_CID_HFLIP:
 560                 /* fixme: we can support changing VFLIP and HFLIP here... */
 561                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
 562                         DEB_D(("V4L2_CID_HFLIP while active capture.\n"));
 563                         up(&dev->lock);
 564                         return -EINVAL;
 565                 }
 566                 vv->hflip = c->value;
 567                 break;
 568         case V4L2_CID_VFLIP:
 569                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
 570                         DEB_D(("V4L2_CID_VFLIP while active capture.\n"));
 571                         up(&dev->lock);
 572                         return -EINVAL;
 573                 }
 574                 vv->vflip = c->value;
 575                 break;
 576         default: {
 577                 return -EINVAL;
 578         }
 579         }
 580         up(&dev->lock);
 581
 582         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 583                 saa7146_stop_preview(fh);
 584                 saa7146_start_preview(fh);
 585         }
 586         return 0;
 587 }
 588
 589 /********************************************************************************/
 590 /* common pagetable functions */
 591
 592 static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
 593 {
 594         struct pci_dev *pci = dev->pci;
 595         struct scatterlist *list = buf->vb.dma.sglist;
 596         int length = buf->vb.dma.sglen;
 597         struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
 598
 599         DEB_EE(("dev:%p, buf:%p, sg_len:%d\n",dev,buf,length));
 600
 601         if( 0 != IS_PLANAR(sfmt->trans)) {
 602                 struct saa7146_pgtable *pt1 = &buf->pt[0];
 603                 struct saa7146_pgtable *pt2 = &buf->pt[1];
 604                 struct saa7146_pgtable *pt3 = &buf->pt[2];
 605                 u32  *ptr1, *ptr2, *ptr3;
 606                 u32 fill;
 607
 608                 int size = buf->fmt->width*buf->fmt->height;
 609                 int i,p,m1,m2,m3,o1,o2;
 610
 611                 switch( sfmt->depth ) {
 612                         case 12: {
 613                                 /* create some offsets inside the page table */
 614                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
 615                                 m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
 616                                 m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
 617                                 o1 = size%PAGE_SIZE;
 618                                 o2 = (size+(size/4))%PAGE_SIZE;
 619                                 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
 620                                 break;
 621                         }
 622                         case 16: {
 623                                 /* create some offsets inside the page table */
 624                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
 625                                 m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
 626                                 m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
 627                                 o1 = size%PAGE_SIZE;
 628                                 o2 = (size+(size/2))%PAGE_SIZE;
 629                                 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
 630                                 break;
 631                         }
 632                         default: {
 633                                 return -1;
 634                         }
 635                 }
 636
 637                 ptr1 = pt1->cpu;
 638                 ptr2 = pt2->cpu;
 639                 ptr3 = pt3->cpu;
 640
 641                 /* walk all pages, copy all page addresses to ptr1 */
 642                 for (i = 0; i < length; i++, list++) {
 643                         for (p = 0; p * 4096 < list->length; p++, ptr1++) {
 644                                 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
 645                         }
 646                 }
 647 /*
 648                 ptr1 = pt1->cpu;
 649                 for(j=0;j<40;j++) {
 650                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
 651                 }
 652 */
 653
 654                 /* if we have a user buffer, the first page may not be
 655                    aligned to a page boundary. */
 656                 pt1->offset = buf->vb.dma.sglist->offset;
 657                 pt2->offset = pt1->offset+o1;
 658                 pt3->offset = pt1->offset+o2;
 659
 660                 /* create video-dma2 page table */
 661                 ptr1 = pt1->cpu;
 662                 for(i = m1; i <= m2 ; i++, ptr2++) {
 663                         *ptr2 = ptr1[i];
 664                 }
 665                 fill = *(ptr2-1);
 666                 for(;i<1024;i++,ptr2++) {
 667                         *ptr2 = fill;
 668                 }
 669                 /* create video-dma3 page table */
 670                 ptr1 = pt1->cpu;
 671                 for(i = m2; i <= m3; i++,ptr3++) {
 672                         *ptr3 = ptr1[i];
 673                 }
 674                 fill = *(ptr3-1);
 675                 for(;i<1024;i++,ptr3++) {
 676                         *ptr3 = fill;
 677                 }
 678                 /* finally: finish up video-dma1 page table */
 679                 ptr1 = pt1->cpu+m1;
 680                 fill = pt1->cpu[m1];
 681                 for(i=m1;i<1024;i++,ptr1++) {
 682                         *ptr1 = fill;
 683                 }
 684 /*
 685                 ptr1 = pt1->cpu;
 686                 ptr2 = pt2->cpu;
 687                 ptr3 = pt3->cpu;
 688                 for(j=0;j<40;j++) {
 689                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
 690                 }
 691                 for(j=0;j<40;j++) {
 692                         printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
 693                 }
 694                 for(j=0;j<40;j++) {
 695                         printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
 696                 }
 697 */
 698         } else {
 699                 struct saa7146_pgtable *pt = &buf->pt[0];
 700                 return saa7146_pgtable_build_single(pci, pt, list, length);
 701         }
 702
 703         return 0;
 704 }
 705
 706
 707 /********************************************************************************/
 708 /* file operations */
 709
 710 static int video_begin(struct saa7146_fh *fh)
 711 {
 712         struct saa7146_dev *dev = fh->dev;
 713         struct saa7146_vv *vv = dev->vv_data;
 714         struct saa7146_format *fmt = NULL;
 715         unsigned int resource;
 716         int ret = 0, err = 0;
 717
 718         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
 719
 720         if ((vv->video_status & STATUS_CAPTURE) != 0) {
 721                 if (vv->video_fh == fh) {
 722                         DEB_S(("already capturing.\n"));
 723                         return 0;
 724                 }
 725                 DEB_S(("already capturing in another open.\n"));
 726                 return -EBUSY;
 727         }
 728
 729         if ((vv->video_status & STATUS_OVERLAY) != 0) {
 730                 DEB_S(("warning: suspending overlay video for streaming capture.\n"));
 731                 vv->ov_suspend = vv->video_fh;
 732                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
 733                 if (0 != err) {
 734                         DEB_D(("suspending video failed. aborting\n"));
 735                         return err;
 736                 }
 737         }
 738
 739         fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
 740         /* we need to have a valid format set here */
 741         BUG_ON(NULL == fmt);
 742
 743         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 744                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
 745         } else {
 746                 resource = RESOURCE_DMA1_HPS;
 747         }
 748
 749         ret = saa7146_res_get(fh, resource);
 750         if (0 == ret) {
 751                 DEB_S(("cannot get capture resource %d\n",resource));
 752                 if (vv->ov_suspend != NULL) {
 753                         saa7146_start_preview(vv->ov_suspend);
 754                         vv->ov_suspend = NULL;
 755                 }
 756                 return -EBUSY;
 757         }
 758
 759         /* clear out beginning of streaming bit (rps register 0)*/
 760         saa7146_write(dev, MC2, MASK_27 );
 761
 762         /* enable rps0 irqs */
 763         SAA7146_IER_ENABLE(dev, MASK_27);
 764
 765         vv->video_fh = fh;
 766         vv->video_status = STATUS_CAPTURE;
 767
 768         return 0;
 769 }
 770
 771 static int video_end(struct saa7146_fh *fh, struct file *file)
 772 {
 773         struct saa7146_dev *dev = fh->dev;
 774         struct saa7146_vv *vv = dev->vv_data;
 775         struct saa7146_format *fmt = NULL;
 776         unsigned long flags;
 777         unsigned int resource;
 778         u32 dmas = 0;
 779         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
 780
 781         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
 782                 DEB_S(("not capturing.\n"));
 783                 return 0;
 784         }
 785
 786         if (vv->video_fh != fh) {
 787                 DEB_S(("capturing, but in another open.\n"));
 788                 return -EBUSY;
 789         }
 790
 791         fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
 792         /* we need to have a valid format set here */
 793         BUG_ON(NULL == fmt);
 794
 795         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 796                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
 797                 dmas = MASK_22 | MASK_21 | MASK_20;
 798         } else {
 799                 resource = RESOURCE_DMA1_HPS;
 800                 dmas = MASK_22;
 801         }
 802         spin_lock_irqsave(&dev->slock,flags);
 803
 804         /* disable rps0  */
 805         saa7146_write(dev, MC1, MASK_28);
 806
 807         /* disable rps0 irqs */
 808         SAA7146_IER_DISABLE(dev, MASK_27);
 809
 810         /* shut down all used video dma transfers */
 811         saa7146_write(dev, MC1, dmas);
 812
 813         spin_unlock_irqrestore(&dev->slock, flags);
 814
 815         vv->video_fh = NULL;
 816         vv->video_status = 0;
 817
 818         saa7146_res_free(fh, resource);
 819
 820         if (vv->ov_suspend != NULL) {
 821                 saa7146_start_preview(vv->ov_suspend);
 822                 vv->ov_suspend = NULL;
 823         }
 824
 825         return 0;
 826 }
 827
 828 /*
 829  * This function is _not_ called directly, but from
 830  * video_generic_ioctl (and maybe others).  userspace
 831  * copying is done already, arg is a kernel pointer.
 832  */
 833
 834 int saa7146_video_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg)
 835 {
 836         struct saa7146_fh *fh  = file->private_data;
 837         struct saa7146_dev *dev = fh->dev;
 838         struct saa7146_vv *vv = dev->vv_data;
 839
 840         int err = 0, result = 0, ee = 0;
 841
 842         struct saa7146_use_ops *ops;
 843         struct videobuf_queue *q;
 844
 845         /* check if extension handles the command */
 846         for(ee = 0; dev->ext_vv_data->ioctls[ee].flags != 0; ee++) {
 847                 if( cmd == dev->ext_vv_data->ioctls[ee].cmd )
 848                         break;
 849         }
 850
 851         if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_EXCLUSIVE) ) {
 852                 DEB_D(("extension handles ioctl exclusive.\n"));
 853                 result = dev->ext_vv_data->ioctl(fh, cmd, arg);
 854                 return result;
 855         }
 856         if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_BEFORE) ) {
 857                 DEB_D(("extension handles ioctl before.\n"));
 858                 result = dev->ext_vv_data->ioctl(fh, cmd, arg);
 859                 if( -EAGAIN != result ) {
 860                         return result;
 861                 }
 862         }
 863
 864         /* fixme: add handle "after" case (is it still needed?) */
 865
 866         switch (fh->type) {
 867         case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
 868                 ops = &saa7146_video_uops;
 869                 q = &fh->video_q;
 870                 break;
 871                 }
 872         case V4L2_BUF_TYPE_VBI_CAPTURE: {
 873                 ops = &saa7146_vbi_uops;
 874                 q = &fh->vbi_q;
 875                 break;
 876                 }
 877         default:
 878                 BUG();
 879                 return 0;
 880         }
 881
 882         switch (cmd) {
 883         case VIDIOC_QUERYCAP:
 884         {
 885                 struct v4l2_capability *cap = arg;
 886                 memset(cap,0,sizeof(*cap));
 887
 888                 DEB_EE(("VIDIOC_QUERYCAP\n"));
 889
 890                 strcpy(cap->driver, "saa7146 v4l2");
 891                 strlcpy(cap->card, dev->ext->name, sizeof(cap->card));
 892                 sprintf(cap->bus_info,"PCI:%s", pci_name(dev->pci));
 893                 cap->version = SAA7146_VERSION_CODE;
 894                 cap->capabilities =
 895                         V4L2_CAP_VIDEO_CAPTURE |
 896                         V4L2_CAP_VIDEO_OVERLAY |
 897                         V4L2_CAP_READWRITE |
 898                         V4L2_CAP_STREAMING;
 899                 cap->capabilities |= dev->ext_vv_data->capabilities;
 900                 return 0;
 901         }
 902         case VIDIOC_G_FBUF:
 903         {
 904                 struct v4l2_framebuffer *fb = arg;
 905
 906                 DEB_EE(("VIDIOC_G_FBUF\n"));
 907
 908                 *fb = vv->ov_fb;
 909                 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
 910                 return 0;
 911         }
 912         case VIDIOC_S_FBUF:
 913         {
 914                 struct v4l2_framebuffer *fb = arg;
 915                 struct saa7146_format *fmt;
 916
 917                 DEB_EE(("VIDIOC_S_FBUF\n"));
 918
 919                 if(!capable(CAP_SYS_ADMIN) &&
 920                    !capable(CAP_SYS_RAWIO))
 921                         return -EPERM;
 922
 923                 /* check args */
 924                 fmt = format_by_fourcc(dev,fb->fmt.pixelformat);
 925                 if (NULL == fmt) {
 926                         return -EINVAL;
 927                 }
 928
 929                 /* planar formats are not allowed for overlay video, clipping and video dma would clash */
 930                 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 931                         DEB_S(("planar pixelformat '%4.4s' not allowed for overlay\n",(char *)&fmt->pixelformat));
 932                 }
 933
 934                 /* check if overlay is running */
 935                 if (IS_OVERLAY_ACTIVE(fh) != 0) {
 936                         if (vv->video_fh != fh) {
 937                                 DEB_D(("refusing to change framebuffer informations while overlay is active in another open.\n"));
 938                                 return -EBUSY;
 939                         }
 940                 }
 941
 942                 down(&dev->lock);
 943
 944                 /* ok, accept it */
 945                 vv->ov_fb = *fb;
 946                 vv->ov_fmt = fmt;
 947                 if (0 == vv->ov_fb.fmt.bytesperline)
 948                         vv->ov_fb.fmt.bytesperline =
 949                                 vv->ov_fb.fmt.width*fmt->depth/8;
 950
 951                 up(&dev->lock);
 952
 953                 return 0;
 954         }
 955         case VIDIOC_ENUM_FMT:
 956         {
 957                 struct v4l2_fmtdesc *f = arg;
 958                 int index;
 959
 960                 switch (f->type) {
 961                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 962                 case V4L2_BUF_TYPE_VIDEO_OVERLAY: {
 963                         index = f->index;
 964                         if (index < 0 || index >= NUM_FORMATS) {
 965                                 return -EINVAL;
 966                         }
 967                         memset(f,0,sizeof(*f));
 968                         f->index = index;
 969                         strlcpy(f->description,formats[index].name,sizeof(f->description));
 970                         f->pixelformat = formats[index].pixelformat;
 971                         break;
 972                 }
 973                 default:
 974                         return -EINVAL;
 975                 }
 976
 977                 DEB_EE(("VIDIOC_ENUM_FMT: type:%d, index:%d\n",f->type,f->index));
 978                 return 0;
 979         }
 980         case VIDIOC_QUERYCTRL:
 981         {
 982                 const struct v4l2_queryctrl *ctrl;
 983                 struct v4l2_queryctrl *c = arg;
 984
 985                 if ((c->id <  V4L2_CID_BASE ||
 986                      c->id >= V4L2_CID_LASTP1) &&
 987                     (c->id <  V4L2_CID_PRIVATE_BASE ||
 988                      c->id >= V4L2_CID_PRIVATE_LASTP1))
 989                         return -EINVAL;
 990
 991                 ctrl = ctrl_by_id(c->id);
 992                 if( NULL == ctrl ) {
 993                         return -EINVAL;
 994 /*
 995                         c->flags = V4L2_CTRL_FLAG_DISABLED;
 996                         return 0;
 997 */
 998                 }
 999
1000                 DEB_EE(("VIDIOC_QUERYCTRL: id:%d\n",c->id));
1001                 *c = *ctrl;
1002                 return 0;
1003         }
1004         case VIDIOC_G_CTRL: {
1005                 DEB_EE(("VIDIOC_G_CTRL\n"));
1006                 return get_control(fh,arg);
1007         }
1008         case VIDIOC_S_CTRL:
1009         {
1010                 DEB_EE(("VIDIOC_S_CTRL\n"));
1011                 err = set_control(fh,arg);
1012                 return err;
1013         }
1014         case VIDIOC_G_PARM:
1015         {
1016                 struct v4l2_streamparm *parm = arg;
1017                 if( parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ) {
1018                         return -EINVAL;
1019                 }
1020                 memset(&parm->parm.capture,0,sizeof(struct v4l2_captureparm));
1021                 parm->parm.capture.readbuffers = 1;
1022                 // fixme: only for PAL!
1023                 parm->parm.capture.timeperframe.numerator = 1;
1024                 parm->parm.capture.timeperframe.denominator = 25;
1025                 return 0;
1026         }
1027         case VIDIOC_G_FMT:
1028         {
1029                 struct v4l2_format *f = arg;
1030                 DEB_EE(("VIDIOC_G_FMT\n"));
1031                 return g_fmt(fh,f);
1032         }
1033         case VIDIOC_S_FMT:
1034         {
1035                 struct v4l2_format *f = arg;
1036                 DEB_EE(("VIDIOC_S_FMT\n"));
1037                 return s_fmt(fh,f);
1038         }
1039         case VIDIOC_TRY_FMT:
1040         {
1041                 struct v4l2_format *f = arg;
1042                 DEB_EE(("VIDIOC_TRY_FMT\n"));
1043                 return try_fmt(fh,f);
1044         }
1045         case VIDIOC_G_STD:
1046         {
1047                 v4l2_std_id *id = arg;
1048                 DEB_EE(("VIDIOC_G_STD\n"));
1049                 *id = vv->standard->id;
1050                 return 0;
1051         }
1052         /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
1053            PAL / NTSC / SECAM. if your hardware does not (or does more)
1054            -- override this function in your extension */
1055         case VIDIOC_ENUMSTD:
1056         {
1057                 struct v4l2_standard *e = arg;
1058                 if (e->index < 0 )
1059                         return -EINVAL;
1060                 if( e->index < dev->ext_vv_data->num_stds ) {
1061                         DEB_EE(("VIDIOC_ENUMSTD: index:%d\n",e->index));
1062                         v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
1063                         return 0;
1064                 }
1065                 return -EINVAL;
1066         }
1067         case VIDIOC_S_STD:
1068         {
1069                 v4l2_std_id *id = arg;
1070                 int found = 0;
1071                 int i, err;
1072
1073                 DEB_EE(("VIDIOC_S_STD\n"));
1074
1075                 if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
1076                         DEB_D(("cannot change video standard while streaming capture is active\n"));
1077                         return -EBUSY;
1078                 }
1079
1080                 if ((vv->video_status & STATUS_OVERLAY) != 0) {
1081                         vv->ov_suspend = vv->video_fh;
1082                         err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
1083                         if (0 != err) {
1084                                 DEB_D(("suspending video failed. aborting\n"));
1085                                 return err;
1086                         }
1087                 }
1088
1089                 down(&dev->lock);
1090
1091                 for(i = 0; i < dev->ext_vv_data->num_stds; i++)
1092                         if (*id & dev->ext_vv_data->stds[i].id)
1093                                 break;
1094                 if (i != dev->ext_vv_data->num_stds) {
1095                         vv->standard = &dev->ext_vv_data->stds[i];
1096                         if( NULL != dev->ext_vv_data->std_callback )
1097                                 dev->ext_vv_data->std_callback(dev, vv->standard);
1098                         found = 1;
1099                 }
1100
1101                 up(&dev->lock);
1102
1103                 if (vv->ov_suspend != NULL) {
1104                         saa7146_start_preview(vv->ov_suspend);
1105                         vv->ov_suspend = NULL;
1106                 }
1107
1108                 if( 0 == found ) {
1109                         DEB_EE(("VIDIOC_S_STD: standard not found.\n"));
1110                         return -EINVAL;
1111                 }
1112
1113                 DEB_EE(("VIDIOC_S_STD: set to standard to '%s'\n",vv->standard->name));
1114                 return 0;
1115         }
1116         case VIDIOC_OVERLAY:
1117
1118
1119
1120
1121         {
1122                 int on = *(int *)arg;
1123                 int err = 0;
1124
1125                 DEB_D(("VIDIOC_OVERLAY on:%d\n",on));
1126                 if (on != 0) {
1127                         err = saa7146_start_preview(fh);
1128                 } else {
1129                         err = saa7146_stop_preview(fh);
1130                 }
1131                 return err;
1132         }
1133         case VIDIOC_REQBUFS: {
1134                 struct v4l2_requestbuffers *req = arg;
1135                 DEB_D(("VIDIOC_REQBUFS, type:%d\n",req->type));
1136                 return videobuf_reqbufs(q,req);
1137         }
1138         case VIDIOC_QUERYBUF: {
1139                 struct v4l2_buffer *buf = arg;
1140                 DEB_D(("VIDIOC_QUERYBUF, type:%d, offset:%d\n",buf->type,buf->m.offset));
1141                 return videobuf_querybuf(q,buf);
1142         }
1143         case VIDIOC_QBUF: {
1144                 struct v4l2_buffer *buf = arg;
1145                 int ret = 0;
1146                 ret = videobuf_qbuf(q,buf);
1147                 DEB_D(("VIDIOC_QBUF: ret:%d, index:%d\n",ret,buf->index));
1148                 return ret;
1149         }
1150         case VIDIOC_DQBUF: {
1151                 struct v4l2_buffer *buf = arg;
1152                 int ret = 0;
1153                 ret = videobuf_dqbuf(q,buf,file->f_flags & O_NONBLOCK);
1154                 DEB_D(("VIDIOC_DQBUF: ret:%d, index:%d\n",ret,buf->index));
1155                 return ret;
1156         }
1157         case VIDIOC_STREAMON: {
1158                 int *type = arg;
1159                 DEB_D(("VIDIOC_STREAMON, type:%d\n",*type));
1160
1161                 err = video_begin(fh);
1162                 if( 0 != err) {
1163                         return err;
1164                 }
1165                 err = videobuf_streamon(q);
1166                 return err;
1167         }
1168         case VIDIOC_STREAMOFF: {
1169                 int *type = arg;
1170
1171                 DEB_D(("VIDIOC_STREAMOFF, type:%d\n",*type));
1172
1173                 /* ugly: we need to copy some checks from video_end(),
1174                    because videobuf_streamoff() relies on the capture running.
1175                    check and fix this */
1176                 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
1177                         DEB_S(("not capturing.\n"));
1178                         return 0;
1179                 }
1180
1181                 if (vv->video_fh != fh) {
1182                         DEB_S(("capturing, but in another open.\n"));
1183                         return -EBUSY;
1184                 }
1185
1186                 err = videobuf_streamoff(q);
1187                 if (0 != err) {
1188                         DEB_D(("warning: videobuf_streamoff() failed.\n"));
1189                         video_end(fh, file);
1190                 } else {
1191                         err = video_end(fh, file);
1192                 }
1193                 return err;
1194         }
1195         case VIDIOCGMBUF:
1196         {
1197                 struct video_mbuf *mbuf = arg;
1198                 struct videobuf_queue *q;
1199                 int i;
1200
1201                 /* fixme: number of capture buffers and sizes for v4l apps */
1202                 int gbuffers = 2;
1203                 int gbufsize = 768*576*4;
1204
1205                 DEB_D(("VIDIOCGMBUF \n"));
1206
1207                 q = &fh->video_q;
1208                 down(&q->lock);
1209                 err = videobuf_mmap_setup(q,gbuffers,gbufsize,
1210                                           V4L2_MEMORY_MMAP);
1211                 if (err < 0) {
1212                         up(&q->lock);
1213                         return err;
1214                 }
1215                 memset(mbuf,0,sizeof(*mbuf));
1216                 mbuf->frames = gbuffers;
1217                 mbuf->size   = gbuffers * gbufsize;
1218                 for (i = 0; i < gbuffers; i++)
1219                         mbuf->offsets[i] = i * gbufsize;
1220                 up(&q->lock);
1221                 return 0;
1222         }
1223         default:
1224                 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
1225                                                   saa7146_video_do_ioctl);
1226         }
1227         return 0;
1228 }
1229
1230 /*********************************************************************************/
1231 /* buffer handling functions                                                  */
1232
1233 static int buffer_activate (struct saa7146_dev *dev,
1234                      struct saa7146_buf *buf,
1235                      struct saa7146_buf *next)
1236 {
1237         struct saa7146_vv *vv = dev->vv_data;
1238
1239         buf->vb.state = STATE_ACTIVE;
1240         saa7146_set_capture(dev,buf,next);
1241
1242         mod_timer(&vv->video_q.timeout, jiffies+BUFFER_TIMEOUT);
1243         return 0;
1244 }
1245
1246 static int buffer_prepare(struct videobuf_queue *q,
1247                           struct videobuf_buffer *vb, enum v4l2_field field)
1248 {
1249         struct file *file = q->priv_data;
1250         struct saa7146_fh *fh = file->private_data;
1251         struct saa7146_dev *dev = fh->dev;
1252         struct saa7146_vv *vv = dev->vv_data;
1253         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1254         int size,err = 0;
1255
1256         DEB_CAP(("vbuf:%p\n",vb));
1257
1258         /* sanity checks */
1259         if (fh->video_fmt.width  < 48 ||
1260             fh->video_fmt.height < 32 ||
1261             fh->video_fmt.width  > vv->standard->h_max_out ||
1262             fh->video_fmt.height > vv->standard->v_max_out) {
1263                 DEB_D(("w (%d) / h (%d) out of bounds.\n",fh->video_fmt.width,fh->video_fmt.height));
1264                 return -EINVAL;
1265         }
1266
1267         size = fh->video_fmt.sizeimage;
1268         if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1269                 DEB_D(("size mismatch.\n"));
1270                 return -EINVAL;
1271         }
1272
1273         DEB_CAP(("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1274                 fh->video_fmt.width,fh->video_fmt.height,size,v4l2_field_names[fh->video_fmt.field]));
1275         if (buf->vb.width  != fh->video_fmt.width  ||
1276             buf->vb.bytesperline != fh->video_fmt.bytesperline ||
1277             buf->vb.height != fh->video_fmt.height ||
1278             buf->vb.size   != size ||
1279             buf->vb.field  != field      ||
1280             buf->vb.field  != fh->video_fmt.field  ||
1281             buf->fmt       != &fh->video_fmt) {
1282                 saa7146_dma_free(dev,buf);
1283         }
1284
1285         if (STATE_NEEDS_INIT == buf->vb.state) {
1286                 struct saa7146_format *sfmt;
1287
1288                 buf->vb.bytesperline  = fh->video_fmt.bytesperline;
1289                 buf->vb.width  = fh->video_fmt.width;
1290                 buf->vb.height = fh->video_fmt.height;
1291                 buf->vb.size   = size;
1292                 buf->vb.field  = field;
1293                 buf->fmt       = &fh->video_fmt;
1294                 buf->vb.field  = fh->video_fmt.field;
1295
1296                 sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
1297
1298                 if( 0 != IS_PLANAR(sfmt->trans)) {
1299                         saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1300                         saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1301                         saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1302
1303                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1304                         saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1305                         saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1306                 } else {
1307                         saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1308                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1309                 }
1310
1311                 err = videobuf_iolock(dev->pci,&buf->vb, &vv->ov_fb);
1312                 if (err)
1313                         goto oops;
1314                 err = saa7146_pgtable_build(dev,buf);
1315                 if (err)
1316                         goto oops;
1317         }
1318         buf->vb.state = STATE_PREPARED;
1319         buf->activate = buffer_activate;
1320
1321         return 0;
1322
1323  oops:
1324         DEB_D(("error out.\n"));
1325         saa7146_dma_free(dev,buf);
1326
1327         return err;
1328 }
1329
1330 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1331 {
1332         struct file *file = q->priv_data;
1333         struct saa7146_fh *fh = file->private_data;
1334
1335         if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1336                 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1337
1338         *size = fh->video_fmt.sizeimage;
1339
1340         /* check if we exceed the "max_memory" parameter */
1341         if( (*count * *size) > (max_memory*1048576) ) {
1342                 *count = (max_memory*1048576) / *size;
1343         }
1344
1345         DEB_CAP(("%d buffers, %d bytes each.\n",*count,*size));
1346
1347         return 0;
1348 }
1349
1350 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1351 {
1352         struct file *file = q->priv_data;
1353         struct saa7146_fh *fh = file->private_data;
1354         struct saa7146_dev *dev = fh->dev;
1355         struct saa7146_vv *vv = dev->vv_data;
1356         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1357
1358         DEB_CAP(("vbuf:%p\n",vb));
1359         saa7146_buffer_queue(fh->dev,&vv->video_q,buf);
1360 }
1361
1362
1363 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1364 {
1365         struct file *file = q->priv_data;
1366         struct saa7146_fh *fh = file->private_data;
1367         struct saa7146_dev *dev = fh->dev;
1368         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1369
1370         DEB_CAP(("vbuf:%p\n",vb));
1371         saa7146_dma_free(dev,buf);
1372 }
1373
1374 static struct videobuf_queue_ops video_qops = {
1375         .buf_setup    = buffer_setup,
1376         .buf_prepare  = buffer_prepare,
1377         .buf_queue    = buffer_queue,
1378         .buf_release  = buffer_release,
1379 };
1380
1381 /********************************************************************************/
1382 /* file operations */
1383
1384 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1385 {
1386         INIT_LIST_HEAD(&vv->video_q.queue);
1387
1388         init_timer(&vv->video_q.timeout);
1389         vv->video_q.timeout.function = saa7146_buffer_timeout;
1390         vv->video_q.timeout.data     = (unsigned long)(&vv->video_q);
1391         vv->video_q.dev              = dev;
1392
1393         /* set some default values */
1394         vv->standard = &dev->ext_vv_data->stds[0];
1395
1396         /* FIXME: what's this? */
1397         vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1398         vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1399 }
1400
1401
1402 static int video_open(struct saa7146_dev *dev, struct file *file)
1403 {
1404         struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1405         struct saa7146_format *sfmt;
1406
1407         fh->video_fmt.width = 384;
1408         fh->video_fmt.height = 288;
1409         fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24;
1410         fh->video_fmt.bytesperline = 0;
1411         fh->video_fmt.field = V4L2_FIELD_ANY;
1412         sfmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
1413         fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8;
1414
1415         videobuf_queue_init(&fh->video_q, &video_qops,
1416                             dev->pci, &dev->slock,
1417                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
1418                             V4L2_FIELD_INTERLACED,
1419                             sizeof(struct saa7146_buf),
1420                             file);
1421
1422         init_MUTEX(&fh->video_q.lock);
1423
1424         return 0;
1425 }
1426
1427
1428 static void video_close(struct saa7146_dev *dev, struct file *file)
1429 {
1430         struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1431         struct saa7146_vv *vv = dev->vv_data;
1432         int err;
1433
1434         if (IS_CAPTURE_ACTIVE(fh) != 0) {
1435                 err = video_end(fh, file);
1436         } else if (IS_OVERLAY_ACTIVE(fh) != 0) {
1437                 err = saa7146_stop_preview(fh);
1438         }
1439
1440         /* hmm, why is this function declared void? */
1441         /* return err */
1442 }
1443
1444
1445 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1446 {
1447         struct saa7146_vv *vv = dev->vv_data;
1448         struct saa7146_dmaqueue *q = &vv->video_q;
1449
1450         spin_lock(&dev->slock);
1451         DEB_CAP(("called.\n"));
1452
1453         /* only finish the buffer if we have one... */
1454         if( NULL != q->curr ) {
1455                 saa7146_buffer_finish(dev,q,STATE_DONE);
1456         }
1457         saa7146_buffer_next(dev,q,0);
1458
1459         spin_unlock(&dev->slock);
1460 }
1461
1462 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1463 {
1464         struct saa7146_fh *fh = file->private_data;
1465         struct saa7146_dev *dev = fh->dev;
1466         struct saa7146_vv *vv = dev->vv_data;
1467         ssize_t ret = 0;
1468
1469         DEB_EE(("called.\n"));
1470
1471         if ((vv->video_status & STATUS_CAPTURE) != 0) {
1472                 /* fixme: should we allow read() captures while streaming capture? */
1473                 if (vv->video_fh == fh) {
1474                         DEB_S(("already capturing.\n"));
1475                         return -EBUSY;
1476                 }
1477                 DEB_S(("already capturing in another open.\n"));
1478                 return -EBUSY;
1479         }
1480
1481         ret = video_begin(fh);
1482         if( 0 != ret) {
1483                 goto out;
1484         }
1485
1486         ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1487                                 file->f_flags & O_NONBLOCK);
1488         if (ret != 0) {
1489                 video_end(fh, file);
1490         } else {
1491                 ret = video_end(fh, file);
1492         }
1493 out:
1494         /* restart overlay if it was active before */
1495         if (vv->ov_suspend != NULL) {
1496                 saa7146_start_preview(vv->ov_suspend);
1497                 vv->ov_suspend = NULL;
1498         }
1499
1500         return ret;
1501 }
1502
1503 struct saa7146_use_ops saa7146_video_uops = {
1504         .init = video_init,
1505         .open = video_open,
1506         .release = video_close,
1507         .irq_done = video_irq_done,
1508         .read = video_read,
1509 };