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 videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
 598         struct scatterlist *list = dma->sglist;
 599         int length = dma->sglen;
 600         struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
 601
 602         DEB_EE(("dev:%p, buf:%p, sg_len:%d\n",dev,buf,length));
 603
 604         if( 0 != IS_PLANAR(sfmt->trans)) {
 605                 struct saa7146_pgtable *pt1 = &buf->pt[0];
 606                 struct saa7146_pgtable *pt2 = &buf->pt[1];
 607                 struct saa7146_pgtable *pt3 = &buf->pt[2];
 608                 u32  *ptr1, *ptr2, *ptr3;
 609                 u32 fill;
 610
 611                 int size = buf->fmt->width*buf->fmt->height;
 612                 int i,p,m1,m2,m3,o1,o2;
 613
 614                 switch( sfmt->depth ) {
 615                         case 12: {
 616                                 /* create some offsets inside the page table */
 617                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
 618                                 m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
 619                                 m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
 620                                 o1 = size%PAGE_SIZE;
 621                                 o2 = (size+(size/4))%PAGE_SIZE;
 622                                 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
 623                                 break;
 624                         }
 625                         case 16: {
 626                                 /* create some offsets inside the page table */
 627                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
 628                                 m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
 629                                 m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
 630                                 o1 = size%PAGE_SIZE;
 631                                 o2 = (size+(size/2))%PAGE_SIZE;
 632                                 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
 633                                 break;
 634                         }
 635                         default: {
 636                                 return -1;
 637                         }
 638                 }
 639
 640                 ptr1 = pt1->cpu;
 641                 ptr2 = pt2->cpu;
 642                 ptr3 = pt3->cpu;
 643
 644                 /* walk all pages, copy all page addresses to ptr1 */
 645                 for (i = 0; i < length; i++, list++) {
 646                         for (p = 0; p * 4096 < list->length; p++, ptr1++) {
 647                                 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
 648                         }
 649                 }
 650 /*
 651                 ptr1 = pt1->cpu;
 652                 for(j=0;j<40;j++) {
 653                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
 654                 }
 655 */
 656
 657                 /* if we have a user buffer, the first page may not be
 658                    aligned to a page boundary. */
 659                 pt1->offset = list->offset;
 660                 pt2->offset = pt1->offset+o1;
 661                 pt3->offset = pt1->offset+o2;
 662
 663                 /* create video-dma2 page table */
 664                 ptr1 = pt1->cpu;
 665                 for(i = m1; i <= m2 ; i++, ptr2++) {
 666                         *ptr2 = ptr1[i];
 667                 }
 668                 fill = *(ptr2-1);
 669                 for(;i<1024;i++,ptr2++) {
 670                         *ptr2 = fill;
 671                 }
 672                 /* create video-dma3 page table */
 673                 ptr1 = pt1->cpu;
 674                 for(i = m2; i <= m3; i++,ptr3++) {
 675                         *ptr3 = ptr1[i];
 676                 }
 677                 fill = *(ptr3-1);
 678                 for(;i<1024;i++,ptr3++) {
 679                         *ptr3 = fill;
 680                 }
 681                 /* finally: finish up video-dma1 page table */
 682                 ptr1 = pt1->cpu+m1;
 683                 fill = pt1->cpu[m1];
 684                 for(i=m1;i<1024;i++,ptr1++) {
 685                         *ptr1 = fill;
 686                 }
 687 /*
 688                 ptr1 = pt1->cpu;
 689                 ptr2 = pt2->cpu;
 690                 ptr3 = pt3->cpu;
 691                 for(j=0;j<40;j++) {
 692                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
 693                 }
 694                 for(j=0;j<40;j++) {
 695                         printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
 696                 }
 697                 for(j=0;j<40;j++) {
 698                         printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
 699                 }
 700 */
 701         } else {
 702                 struct saa7146_pgtable *pt = &buf->pt[0];
 703                 return saa7146_pgtable_build_single(pci, pt, list, length);
 704         }
 705
 706         return 0;
 707 }
 708
 709
 710 /********************************************************************************/
 711 /* file operations */
 712
 713 static int video_begin(struct saa7146_fh *fh)
 714 {
 715         struct saa7146_dev *dev = fh->dev;
 716         struct saa7146_vv *vv = dev->vv_data;
 717         struct saa7146_format *fmt = NULL;
 718         unsigned int resource;
 719         int ret = 0, err = 0;
 720
 721         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
 722
 723         if ((vv->video_status & STATUS_CAPTURE) != 0) {
 724                 if (vv->video_fh == fh) {
 725                         DEB_S(("already capturing.\n"));
 726                         return 0;
 727                 }
 728                 DEB_S(("already capturing in another open.\n"));
 729                 return -EBUSY;
 730         }
 731
 732         if ((vv->video_status & STATUS_OVERLAY) != 0) {
 733                 DEB_S(("warning: suspending overlay video for streaming capture.\n"));
 734                 vv->ov_suspend = vv->video_fh;
 735                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
 736                 if (0 != err) {
 737                         DEB_D(("suspending video failed. aborting\n"));
 738                         return err;
 739                 }
 740         }
 741
 742         fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
 743         /* we need to have a valid format set here */
 744         BUG_ON(NULL == fmt);
 745
 746         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 747                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
 748         } else {
 749                 resource = RESOURCE_DMA1_HPS;
 750         }
 751
 752         ret = saa7146_res_get(fh, resource);
 753         if (0 == ret) {
 754                 DEB_S(("cannot get capture resource %d\n",resource));
 755                 if (vv->ov_suspend != NULL) {
 756                         saa7146_start_preview(vv->ov_suspend);
 757                         vv->ov_suspend = NULL;
 758                 }
 759                 return -EBUSY;
 760         }
 761
 762         /* clear out beginning of streaming bit (rps register 0)*/
 763         saa7146_write(dev, MC2, MASK_27 );
 764
 765         /* enable rps0 irqs */
 766         SAA7146_IER_ENABLE(dev, MASK_27);
 767
 768         vv->video_fh = fh;
 769         vv->video_status = STATUS_CAPTURE;
 770
 771         return 0;
 772 }
 773
 774 static int video_end(struct saa7146_fh *fh, struct file *file)
 775 {
 776         struct saa7146_dev *dev = fh->dev;
 777         struct saa7146_vv *vv = dev->vv_data;
 778         struct saa7146_format *fmt = NULL;
 779         unsigned long flags;
 780         unsigned int resource;
 781         u32 dmas = 0;
 782         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
 783
 784         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
 785                 DEB_S(("not capturing.\n"));
 786                 return 0;
 787         }
 788
 789         if (vv->video_fh != fh) {
 790                 DEB_S(("capturing, but in another open.\n"));
 791                 return -EBUSY;
 792         }
 793
 794         fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
 795         /* we need to have a valid format set here */
 796         BUG_ON(NULL == fmt);
 797
 798         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 799                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
 800                 dmas = MASK_22 | MASK_21 | MASK_20;
 801         } else {
 802                 resource = RESOURCE_DMA1_HPS;
 803                 dmas = MASK_22;
 804         }
 805         spin_lock_irqsave(&dev->slock,flags);
 806
 807         /* disable rps0  */
 808         saa7146_write(dev, MC1, MASK_28);
 809
 810         /* disable rps0 irqs */
 811         SAA7146_IER_DISABLE(dev, MASK_27);
 812
 813         /* shut down all used video dma transfers */
 814         saa7146_write(dev, MC1, dmas);
 815
 816         spin_unlock_irqrestore(&dev->slock, flags);
 817
 818         vv->video_fh = NULL;
 819         vv->video_status = 0;
 820
 821         saa7146_res_free(fh, resource);
 822
 823         if (vv->ov_suspend != NULL) {
 824                 saa7146_start_preview(vv->ov_suspend);
 825                 vv->ov_suspend = NULL;
 826         }
 827
 828         return 0;
 829 }
 830
 831 /*
 832  * This function is _not_ called directly, but from
 833  * video_generic_ioctl (and maybe others).  userspace
 834  * copying is done already, arg is a kernel pointer.
 835  */
 836
 837 int saa7146_video_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg)
 838 {
 839         struct saa7146_fh *fh  = file->private_data;
 840         struct saa7146_dev *dev = fh->dev;
 841         struct saa7146_vv *vv = dev->vv_data;
 842
 843         int err = 0, result = 0, ee = 0;
 844
 845         struct saa7146_use_ops *ops;
 846         struct videobuf_queue *q;
 847
 848         /* check if extension handles the command */
 849         for(ee = 0; dev->ext_vv_data->ioctls[ee].flags != 0; ee++) {
 850                 if( cmd == dev->ext_vv_data->ioctls[ee].cmd )
 851                         break;
 852         }
 853
 854         if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_EXCLUSIVE) ) {
 855                 DEB_D(("extension handles ioctl exclusive.\n"));
 856                 result = dev->ext_vv_data->ioctl(fh, cmd, arg);
 857                 return result;
 858         }
 859         if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_BEFORE) ) {
 860                 DEB_D(("extension handles ioctl before.\n"));
 861                 result = dev->ext_vv_data->ioctl(fh, cmd, arg);
 862                 if( -EAGAIN != result ) {
 863                         return result;
 864                 }
 865         }
 866
 867         /* fixme: add handle "after" case (is it still needed?) */
 868
 869         switch (fh->type) {
 870         case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
 871                 ops = &saa7146_video_uops;
 872                 q = &fh->video_q;
 873                 break;
 874                 }
 875         case V4L2_BUF_TYPE_VBI_CAPTURE: {
 876                 ops = &saa7146_vbi_uops;
 877                 q = &fh->vbi_q;
 878                 break;
 879                 }
 880         default:
 881                 BUG();
 882                 return 0;
 883         }
 884
 885         switch (cmd) {
 886         case VIDIOC_QUERYCAP:
 887         {
 888                 struct v4l2_capability *cap = arg;
 889                 memset(cap,0,sizeof(*cap));
 890
 891                 DEB_EE(("VIDIOC_QUERYCAP\n"));
 892
 893                 strcpy((char *)cap->driver, "saa7146 v4l2");
 894                 strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
 895                 sprintf((char *)cap->bus_info,"PCI:%s", pci_name(dev->pci));
 896                 cap->version = SAA7146_VERSION_CODE;
 897                 cap->capabilities =
 898                         V4L2_CAP_VIDEO_CAPTURE |
 899                         V4L2_CAP_VIDEO_OVERLAY |
 900                         V4L2_CAP_READWRITE |
 901                         V4L2_CAP_STREAMING;
 902                 cap->capabilities |= dev->ext_vv_data->capabilities;
 903                 return 0;
 904         }
 905         case VIDIOC_G_FBUF:
 906         {
 907                 struct v4l2_framebuffer *fb = arg;
 908
 909                 DEB_EE(("VIDIOC_G_FBUF\n"));
 910
 911                 *fb = vv->ov_fb;
 912                 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
 913                 return 0;
 914         }
 915         case VIDIOC_S_FBUF:
 916         {
 917                 struct v4l2_framebuffer *fb = arg;
 918                 struct saa7146_format *fmt;
 919
 920                 DEB_EE(("VIDIOC_S_FBUF\n"));
 921
 922                 if(!capable(CAP_SYS_ADMIN) &&
 923                    !capable(CAP_SYS_RAWIO))
 924                         return -EPERM;
 925
 926                 /* check args */
 927                 fmt = format_by_fourcc(dev,fb->fmt.pixelformat);
 928                 if (NULL == fmt) {
 929                         return -EINVAL;
 930                 }
 931
 932                 /* planar formats are not allowed for overlay video, clipping and video dma would clash */
 933                 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 934                         DEB_S(("planar pixelformat '%4.4s' not allowed for overlay\n",(char *)&fmt->pixelformat));
 935                 }
 936
 937                 /* check if overlay is running */
 938                 if (IS_OVERLAY_ACTIVE(fh) != 0) {
 939                         if (vv->video_fh != fh) {
 940                                 DEB_D(("refusing to change framebuffer informations while overlay is active in another open.\n"));
 941                                 return -EBUSY;
 942                         }
 943                 }
 944
 945                 mutex_lock(&dev->lock);
 946
 947                 /* ok, accept it */
 948                 vv->ov_fb = *fb;
 949                 vv->ov_fmt = fmt;
 950                 if (0 == vv->ov_fb.fmt.bytesperline)
 951                         vv->ov_fb.fmt.bytesperline =
 952                                 vv->ov_fb.fmt.width*fmt->depth/8;
 953
 954                 mutex_unlock(&dev->lock);
 955
 956                 return 0;
 957         }
 958         case VIDIOC_ENUM_FMT:
 959         {
 960                 struct v4l2_fmtdesc *f = arg;
 961                 int index;
 962
 963                 switch (f->type) {
 964                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 965                 case V4L2_BUF_TYPE_VIDEO_OVERLAY: {
 966                         index = f->index;
 967                         if (index < 0 || index >= NUM_FORMATS) {
 968                                 return -EINVAL;
 969                         }
 970                         memset(f,0,sizeof(*f));
 971                         f->index = index;
 972                         strlcpy((char *)f->description,formats[index].name,sizeof(f->description));
 973                         f->pixelformat = formats[index].pixelformat;
 974                         break;
 975                 }
 976                 default:
 977                         return -EINVAL;
 978                 }
 979
 980                 DEB_EE(("VIDIOC_ENUM_FMT: type:%d, index:%d\n",f->type,f->index));
 981                 return 0;
 982         }
 983         case VIDIOC_QUERYCTRL:
 984         {
 985                 const struct v4l2_queryctrl *ctrl;
 986                 struct v4l2_queryctrl *c = arg;
 987
 988                 if ((c->id <  V4L2_CID_BASE ||
 989                      c->id >= V4L2_CID_LASTP1) &&
 990                     (c->id <  V4L2_CID_PRIVATE_BASE ||
 991                      c->id >= V4L2_CID_PRIVATE_LASTP1))
 992                         return -EINVAL;
 993
 994                 ctrl = ctrl_by_id(c->id);
 995                 if( NULL == ctrl ) {
 996                         return -EINVAL;
 997 /*
 998                         c->flags = V4L2_CTRL_FLAG_DISABLED;
 999                         return 0;
1000 */
1001                 }
1002
1003                 DEB_EE(("VIDIOC_QUERYCTRL: id:%d\n",c->id));
1004                 *c = *ctrl;
1005                 return 0;
1006         }
1007         case VIDIOC_G_CTRL: {
1008                 DEB_EE(("VIDIOC_G_CTRL\n"));
1009                 return get_control(fh,arg);
1010         }
1011         case VIDIOC_S_CTRL:
1012         {
1013                 DEB_EE(("VIDIOC_S_CTRL\n"));
1014                 err = set_control(fh,arg);
1015                 return err;
1016         }
1017         case VIDIOC_G_PARM:
1018         {
1019                 struct v4l2_streamparm *parm = arg;
1020                 if( parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ) {
1021                         return -EINVAL;
1022                 }
1023                 memset(&parm->parm.capture,0,sizeof(struct v4l2_captureparm));
1024                 parm->parm.capture.readbuffers = 1;
1025                 // fixme: only for PAL!
1026                 parm->parm.capture.timeperframe.numerator = 1;
1027                 parm->parm.capture.timeperframe.denominator = 25;
1028                 return 0;
1029         }
1030         case VIDIOC_G_FMT:
1031         {
1032                 struct v4l2_format *f = arg;
1033                 DEB_EE(("VIDIOC_G_FMT\n"));
1034                 return g_fmt(fh,f);
1035         }
1036         case VIDIOC_S_FMT:
1037         {
1038                 struct v4l2_format *f = arg;
1039                 DEB_EE(("VIDIOC_S_FMT\n"));
1040                 return s_fmt(fh,f);
1041         }
1042         case VIDIOC_TRY_FMT:
1043         {
1044                 struct v4l2_format *f = arg;
1045                 DEB_EE(("VIDIOC_TRY_FMT\n"));
1046                 return try_fmt(fh,f);
1047         }
1048         case VIDIOC_G_STD:
1049         {
1050                 v4l2_std_id *id = arg;
1051                 DEB_EE(("VIDIOC_G_STD\n"));
1052                 *id = vv->standard->id;
1053                 return 0;
1054         }
1055         /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
1056            PAL / NTSC / SECAM. if your hardware does not (or does more)
1057            -- override this function in your extension */
1058         case VIDIOC_ENUMSTD:
1059         {
1060                 struct v4l2_standard *e = arg;
1061                 if (e->index < 0 )
1062                         return -EINVAL;
1063                 if( e->index < dev->ext_vv_data->num_stds ) {
1064                         DEB_EE(("VIDIOC_ENUMSTD: index:%d\n",e->index));
1065                         v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
1066                         return 0;
1067                 }
1068                 return -EINVAL;
1069         }
1070         case VIDIOC_S_STD:
1071         {
1072                 v4l2_std_id *id = arg;
1073                 int found = 0;
1074                 int i, err;
1075
1076                 DEB_EE(("VIDIOC_S_STD\n"));
1077
1078                 if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
1079                         DEB_D(("cannot change video standard while streaming capture is active\n"));
1080                         return -EBUSY;
1081                 }
1082
1083                 if ((vv->video_status & STATUS_OVERLAY) != 0) {
1084                         vv->ov_suspend = vv->video_fh;
1085                         err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
1086                         if (0 != err) {
1087                                 DEB_D(("suspending video failed. aborting\n"));
1088                                 return err;
1089                         }
1090                 }
1091
1092                 mutex_lock(&dev->lock);
1093
1094                 for(i = 0; i < dev->ext_vv_data->num_stds; i++)
1095                         if (*id & dev->ext_vv_data->stds[i].id)
1096                                 break;
1097                 if (i != dev->ext_vv_data->num_stds) {
1098                         vv->standard = &dev->ext_vv_data->stds[i];
1099                         if( NULL != dev->ext_vv_data->std_callback )
1100                                 dev->ext_vv_data->std_callback(dev, vv->standard);
1101                         found = 1;
1102                 }
1103
1104                 mutex_unlock(&dev->lock);
1105
1106                 if (vv->ov_suspend != NULL) {
1107                         saa7146_start_preview(vv->ov_suspend);
1108                         vv->ov_suspend = NULL;
1109                 }
1110
1111                 if( 0 == found ) {
1112                         DEB_EE(("VIDIOC_S_STD: standard not found.\n"));
1113                         return -EINVAL;
1114                 }
1115
1116                 DEB_EE(("VIDIOC_S_STD: set to standard to '%s'\n",vv->standard->name));
1117                 return 0;
1118         }
1119         case VIDIOC_OVERLAY:
1120         {
1121                 int on = *(int *)arg;
1122                 int err = 0;
1123
1124                 DEB_D(("VIDIOC_OVERLAY on:%d\n",on));
1125                 if (on != 0) {
1126                         err = saa7146_start_preview(fh);
1127                 } else {
1128                         err = saa7146_stop_preview(fh);
1129                 }
1130                 return err;
1131         }
1132         case VIDIOC_REQBUFS: {
1133                 struct v4l2_requestbuffers *req = arg;
1134                 DEB_D(("VIDIOC_REQBUFS, type:%d\n",req->type));
1135                 return videobuf_reqbufs(q,req);
1136         }
1137         case VIDIOC_QUERYBUF: {
1138                 struct v4l2_buffer *buf = arg;
1139                 DEB_D(("VIDIOC_QUERYBUF, type:%d, offset:%d\n",buf->type,buf->m.offset));
1140                 return videobuf_querybuf(q,buf);
1141         }
1142         case VIDIOC_QBUF: {
1143                 struct v4l2_buffer *buf = arg;
1144                 int ret = 0;
1145                 ret = videobuf_qbuf(q,buf);
1146                 DEB_D(("VIDIOC_QBUF: ret:%d, index:%d\n",ret,buf->index));
1147                 return ret;
1148         }
1149         case VIDIOC_DQBUF: {
1150                 struct v4l2_buffer *buf = arg;
1151                 int ret = 0;
1152                 ret = videobuf_dqbuf(q,buf,file->f_flags & O_NONBLOCK);
1153                 DEB_D(("VIDIOC_DQBUF: ret:%d, index:%d\n",ret,buf->index));
1154                 return ret;
1155         }
1156         case VIDIOC_STREAMON: {
1157                 int *type = arg;
1158                 DEB_D(("VIDIOC_STREAMON, type:%d\n",*type));
1159
1160                 err = video_begin(fh);
1161                 if( 0 != err) {
1162                         return err;
1163                 }
1164                 err = videobuf_streamon(q);
1165                 return err;
1166         }
1167         case VIDIOC_STREAMOFF: {
1168                 int *type = arg;
1169
1170                 DEB_D(("VIDIOC_STREAMOFF, type:%d\n",*type));
1171
1172                 /* ugly: we need to copy some checks from video_end(),
1173                    because videobuf_streamoff() relies on the capture running.
1174                    check and fix this */
1175                 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
1176                         DEB_S(("not capturing.\n"));
1177                         return 0;
1178                 }
1179
1180                 if (vv->video_fh != fh) {
1181                         DEB_S(("capturing, but in another open.\n"));
1182                         return -EBUSY;
1183                 }
1184
1185                 err = videobuf_streamoff(q);
1186                 if (0 != err) {
1187                         DEB_D(("warning: videobuf_streamoff() failed.\n"));
1188                         video_end(fh, file);
1189                 } else {
1190                         err = video_end(fh, file);
1191                 }
1192                 return err;
1193         }
1194 #ifdef CONFIG_VIDEO_V4L1_COMPAT
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                 mutex_lock(&q->lock);
1209                 err = videobuf_mmap_setup(q,gbuffers,gbufsize,
1210                                           V4L2_MEMORY_MMAP);
1211                 if (err < 0) {
1212                         mutex_unlock(&q->lock);
1213                         return err;
1214                 }
1215
1216                 gbuffers = err;
1217                 memset(mbuf,0,sizeof(*mbuf));
1218                 mbuf->frames = gbuffers;
1219                 mbuf->size   = gbuffers * gbufsize;
1220                 for (i = 0; i < gbuffers; i++)
1221                         mbuf->offsets[i] = i * gbufsize;
1222                 mutex_unlock(&q->lock);
1223                 return 0;
1224         }
1225 #endif
1226         default:
1227                 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
1228                                                   saa7146_video_do_ioctl);
1229         }
1230         return 0;
1231 }
1232
1233 /*********************************************************************************/
1234 /* buffer handling functions                                                  */
1235
1236 static int buffer_activate (struct saa7146_dev *dev,
1237                      struct saa7146_buf *buf,
1238                      struct saa7146_buf *next)
1239 {
1240         struct saa7146_vv *vv = dev->vv_data;
1241
1242         buf->vb.state = STATE_ACTIVE;
1243         saa7146_set_capture(dev,buf,next);
1244
1245         mod_timer(&vv->video_q.timeout, jiffies+BUFFER_TIMEOUT);
1246         return 0;
1247 }
1248
1249 static int buffer_prepare(struct videobuf_queue *q,
1250                           struct videobuf_buffer *vb, enum v4l2_field field)
1251 {
1252         struct file *file = q->priv_data;
1253         struct saa7146_fh *fh = file->private_data;
1254         struct saa7146_dev *dev = fh->dev;
1255         struct saa7146_vv *vv = dev->vv_data;
1256         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1257         int size,err = 0;
1258
1259         DEB_CAP(("vbuf:%p\n",vb));
1260
1261         /* sanity checks */
1262         if (fh->video_fmt.width  < 48 ||
1263             fh->video_fmt.height < 32 ||
1264             fh->video_fmt.width  > vv->standard->h_max_out ||
1265             fh->video_fmt.height > vv->standard->v_max_out) {
1266                 DEB_D(("w (%d) / h (%d) out of bounds.\n",fh->video_fmt.width,fh->video_fmt.height));
1267                 return -EINVAL;
1268         }
1269
1270         size = fh->video_fmt.sizeimage;
1271         if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1272                 DEB_D(("size mismatch.\n"));
1273                 return -EINVAL;
1274         }
1275
1276         DEB_CAP(("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1277                 fh->video_fmt.width,fh->video_fmt.height,size,v4l2_field_names[fh->video_fmt.field]));
1278         if (buf->vb.width  != fh->video_fmt.width  ||
1279             buf->vb.bytesperline != fh->video_fmt.bytesperline ||
1280             buf->vb.height != fh->video_fmt.height ||
1281             buf->vb.size   != size ||
1282             buf->vb.field  != field      ||
1283             buf->vb.field  != fh->video_fmt.field  ||
1284             buf->fmt       != &fh->video_fmt) {
1285                 saa7146_dma_free(dev,q,buf);
1286         }
1287
1288         if (STATE_NEEDS_INIT == buf->vb.state) {
1289                 struct saa7146_format *sfmt;
1290
1291                 buf->vb.bytesperline  = fh->video_fmt.bytesperline;
1292                 buf->vb.width  = fh->video_fmt.width;
1293                 buf->vb.height = fh->video_fmt.height;
1294                 buf->vb.size   = size;
1295                 buf->vb.field  = field;
1296                 buf->fmt       = &fh->video_fmt;
1297                 buf->vb.field  = fh->video_fmt.field;
1298
1299                 sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
1300
1301                 if( 0 != IS_PLANAR(sfmt->trans)) {
1302                         saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1303                         saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1304                         saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1305
1306                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1307                         saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1308                         saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1309                 } else {
1310                         saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1311                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1312                 }
1313
1314                 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1315                 if (err)
1316                         goto oops;
1317                 err = saa7146_pgtable_build(dev,buf);
1318                 if (err)
1319                         goto oops;
1320         }
1321         buf->vb.state = STATE_PREPARED;
1322         buf->activate = buffer_activate;
1323
1324         return 0;
1325
1326  oops:
1327         DEB_D(("error out.\n"));
1328         saa7146_dma_free(dev,q,buf);
1329
1330         return err;
1331 }
1332
1333 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1334 {
1335         struct file *file = q->priv_data;
1336         struct saa7146_fh *fh = file->private_data;
1337
1338         if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1339                 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1340
1341         *size = fh->video_fmt.sizeimage;
1342
1343         /* check if we exceed the "max_memory" parameter */
1344         if( (*count * *size) > (max_memory*1048576) ) {
1345                 *count = (max_memory*1048576) / *size;
1346         }
1347
1348         DEB_CAP(("%d buffers, %d bytes each.\n",*count,*size));
1349
1350         return 0;
1351 }
1352
1353 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1354 {
1355         struct file *file = q->priv_data;
1356         struct saa7146_fh *fh = file->private_data;
1357         struct saa7146_dev *dev = fh->dev;
1358         struct saa7146_vv *vv = dev->vv_data;
1359         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1360
1361         DEB_CAP(("vbuf:%p\n",vb));
1362         saa7146_buffer_queue(fh->dev,&vv->video_q,buf);
1363 }
1364
1365 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1366 {
1367         struct file *file = q->priv_data;
1368         struct saa7146_fh *fh = file->private_data;
1369         struct saa7146_dev *dev = fh->dev;
1370         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1371
1372         DEB_CAP(("vbuf:%p\n",vb));
1373         saa7146_dma_free(dev,q,buf);
1374 }
1375
1376 static struct videobuf_queue_ops video_qops = {
1377         .buf_setup    = buffer_setup,
1378         .buf_prepare  = buffer_prepare,
1379         .buf_queue    = buffer_queue,
1380         .buf_release  = buffer_release,
1381 };
1382
1383 /********************************************************************************/
1384 /* file operations */
1385
1386 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1387 {
1388         INIT_LIST_HEAD(&vv->video_q.queue);
1389
1390         init_timer(&vv->video_q.timeout);
1391         vv->video_q.timeout.function = saa7146_buffer_timeout;
1392         vv->video_q.timeout.data     = (unsigned long)(&vv->video_q);
1393         vv->video_q.dev              = dev;
1394
1395         /* set some default values */
1396         vv->standard = &dev->ext_vv_data->stds[0];
1397
1398         /* FIXME: what's this? */
1399         vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1400         vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1401 }
1402
1403
1404 static int video_open(struct saa7146_dev *dev, struct file *file)
1405 {
1406         struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1407         struct saa7146_format *sfmt;
1408
1409         fh->video_fmt.width = 384;
1410         fh->video_fmt.height = 288;
1411         fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24;
1412         fh->video_fmt.bytesperline = 0;
1413         fh->video_fmt.field = V4L2_FIELD_ANY;
1414         sfmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
1415         fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8;
1416
1417         videobuf_queue_pci_init(&fh->video_q, &video_qops,
1418                             dev->pci, &dev->slock,
1419                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
1420                             V4L2_FIELD_INTERLACED,
1421                             sizeof(struct saa7146_buf),
1422                             file);
1423
1424         mutex_init(&fh->video_q.lock);
1425
1426         return 0;
1427 }
1428
1429
1430 static void video_close(struct saa7146_dev *dev, struct file *file)
1431 {
1432         struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1433         struct saa7146_vv *vv = dev->vv_data;
1434         struct videobuf_queue *q = &fh->video_q;
1435         int err;
1436
1437         if (IS_CAPTURE_ACTIVE(fh) != 0) {
1438                 err = video_end(fh, file);
1439         } else if (IS_OVERLAY_ACTIVE(fh) != 0) {
1440                 err = saa7146_stop_preview(fh);
1441         }
1442
1443         // release all capture buffers
1444         mutex_lock(&q->lock);
1445         videobuf_read_stop(q);
1446         mutex_unlock(&q->lock);
1447
1448         /* hmm, why is this function declared void? */
1449         /* return err */
1450 }
1451
1452
1453 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1454 {
1455         struct saa7146_vv *vv = dev->vv_data;
1456         struct saa7146_dmaqueue *q = &vv->video_q;
1457
1458         spin_lock(&dev->slock);
1459         DEB_CAP(("called.\n"));
1460
1461         /* only finish the buffer if we have one... */
1462         if( NULL != q->curr ) {
1463                 saa7146_buffer_finish(dev,q,STATE_DONE);
1464         }
1465         saa7146_buffer_next(dev,q,0);
1466
1467         spin_unlock(&dev->slock);
1468 }
1469
1470 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1471 {
1472         struct saa7146_fh *fh = file->private_data;
1473         struct saa7146_dev *dev = fh->dev;
1474         struct saa7146_vv *vv = dev->vv_data;
1475         ssize_t ret = 0;
1476
1477         DEB_EE(("called.\n"));
1478
1479         if ((vv->video_status & STATUS_CAPTURE) != 0) {
1480                 /* fixme: should we allow read() captures while streaming capture? */
1481                 if (vv->video_fh == fh) {
1482                         DEB_S(("already capturing.\n"));
1483                         return -EBUSY;
1484                 }
1485                 DEB_S(("already capturing in another open.\n"));
1486                 return -EBUSY;
1487         }
1488
1489         ret = video_begin(fh);
1490         if( 0 != ret) {
1491                 goto out;
1492         }
1493
1494         ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1495                                 file->f_flags & O_NONBLOCK);
1496         if (ret != 0) {
1497                 video_end(fh, file);
1498         } else {
1499                 ret = video_end(fh, file);
1500         }
1501 out:
1502         /* restart overlay if it was active before */
1503         if (vv->ov_suspend != NULL) {
1504                 saa7146_start_preview(vv->ov_suspend);
1505                 vv->ov_suspend = NULL;
1506         }
1507
1508         return ret;
1509 }
1510
1511 struct saa7146_use_ops saa7146_video_uops = {
1512         .init = video_init,
1513         .open = video_open,
1514         .release = video_close,
1515         .irq_done = video_irq_done,
1516         .read = video_read,
1517 };