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