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

   1 #include <media/saa7146_vv.h>
   2 #include <media/v4l2-chip-ident.h>
   3
   4 static int max_memory = 32;
   5
   6 module_param(max_memory, int, 0644);
   7 MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)");
   8
   9 #define IS_CAPTURE_ACTIVE(fh) \
  10         (((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh))
  11
  12 #define IS_OVERLAY_ACTIVE(fh) \
  13         (((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh))
  14
  15 /* format descriptions for capture and preview */
  16 static struct saa7146_format formats[] = {
  17         {
  18                 .name           = "RGB-8 (3-3-2)",
  19                 .pixelformat    = V4L2_PIX_FMT_RGB332,
  20                 .trans          = RGB08_COMPOSED,
  21                 .depth          = 8,
  22                 .flags          = 0,
  23         }, {
  24                 .name           = "RGB-16 (5/B-6/G-5/R)",
  25                 .pixelformat    = V4L2_PIX_FMT_RGB565,
  26                 .trans          = RGB16_COMPOSED,
  27                 .depth          = 16,
  28                 .flags          = 0,
  29         }, {
  30                 .name           = "RGB-24 (B-G-R)",
  31                 .pixelformat    = V4L2_PIX_FMT_BGR24,
  32                 .trans          = RGB24_COMPOSED,
  33                 .depth          = 24,
  34                 .flags          = 0,
  35         }, {
  36                 .name           = "RGB-32 (B-G-R)",
  37                 .pixelformat    = V4L2_PIX_FMT_BGR32,
  38                 .trans          = RGB32_COMPOSED,
  39                 .depth          = 32,
  40                 .flags          = 0,
  41         }, {
  42                 .name           = "RGB-32 (R-G-B)",
  43                 .pixelformat    = V4L2_PIX_FMT_RGB32,
  44                 .trans          = RGB32_COMPOSED,
  45                 .depth          = 32,
  46                 .flags          = 0,
  47                 .swap           = 0x2,
  48         }, {
  49                 .name           = "Greyscale-8",
  50                 .pixelformat    = V4L2_PIX_FMT_GREY,
  51                 .trans          = Y8,
  52                 .depth          = 8,
  53                 .flags          = 0,
  54         }, {
  55                 .name           = "YUV 4:2:2 planar (Y-Cb-Cr)",
  56                 .pixelformat    = V4L2_PIX_FMT_YUV422P,
  57                 .trans          = YUV422_DECOMPOSED,
  58                 .depth          = 16,
  59                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
  60         }, {
  61                 .name           = "YVU 4:2:0 planar (Y-Cb-Cr)",
  62                 .pixelformat    = V4L2_PIX_FMT_YVU420,
  63                 .trans          = YUV420_DECOMPOSED,
  64                 .depth          = 12,
  65                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
  66         }, {
  67                 .name           = "YUV 4:2:0 planar (Y-Cb-Cr)",
  68                 .pixelformat    = V4L2_PIX_FMT_YUV420,
  69                 .trans          = YUV420_DECOMPOSED,
  70                 .depth          = 12,
  71                 .flags          = FORMAT_IS_PLANAR,
  72         }, {
  73                 .name           = "YUV 4:2:2 (U-Y-V-Y)",
  74                 .pixelformat    = V4L2_PIX_FMT_UYVY,
  75                 .trans          = YUV422_COMPOSED,
  76                 .depth          = 16,
  77                 .flags          = 0,
  78         }
  79 };
  80
  81 /* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps.
  82    due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped
  83    (like V4L2_PIX_FMT_YUYV) ... 8-( */
  84
  85 static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
  86
  87 struct saa7146_format* format_by_fourcc(struct saa7146_dev *dev, int fourcc)
  88 {
  89         int i, j = NUM_FORMATS;
  90
  91         for (i = 0; i < j; i++) {
  92                 if (formats[i].pixelformat == fourcc) {
  93                         return formats+i;
  94                 }
  95         }
  96
  97         DEB_D(("unknown pixelformat:'%4.4s'\n",(char *)&fourcc));
  98         return NULL;
  99 }
 100
 101 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f);
 102
 103 int saa7146_start_preview(struct saa7146_fh *fh)
 104 {
 105         struct saa7146_dev *dev = fh->dev;
 106         struct saa7146_vv *vv = dev->vv_data;
 107         struct v4l2_format fmt;
 108         int ret = 0, err = 0;
 109
 110         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
 111
 112         /* check if we have overlay informations */
 113         if( NULL == fh->ov.fh ) {
 114                 DEB_D(("no overlay data available. try S_FMT first.\n"));
 115                 return -EAGAIN;
 116         }
 117
 118         /* check if streaming capture is running */
 119         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 120                 DEB_D(("streaming capture is active.\n"));
 121                 return -EBUSY;
 122         }
 123
 124         /* check if overlay is running */
 125         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 126                 if (vv->video_fh == fh) {
 127                         DEB_D(("overlay is already active.\n"));
 128                         return 0;
 129                 }
 130                 DEB_D(("overlay is already active in another open.\n"));
 131                 return -EBUSY;
 132         }
 133
 134         if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
 135                 DEB_D(("cannot get necessary overlay resources\n"));
 136                 return -EBUSY;
 137         }
 138
 139         fmt.fmt.win = fh->ov.win;
 140         err = vidioc_try_fmt_vid_overlay(NULL, fh, &fmt);
 141         if (0 != err) {
 142                 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 143                 return -EBUSY;
 144         }
 145         fh->ov.win = fmt.fmt.win;
 146         vv->ov_data = &fh->ov;
 147
 148         DEB_D(("%dx%d+%d+%d %s field=%s\n",
 149                 fh->ov.win.w.width,fh->ov.win.w.height,
 150                 fh->ov.win.w.left,fh->ov.win.w.top,
 151                 vv->ov_fmt->name,v4l2_field_names[fh->ov.win.field]));
 152
 153         if (0 != (ret = saa7146_enable_overlay(fh))) {
 154                 DEB_D(("enabling overlay failed: %d\n",ret));
 155                 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 156                 return ret;
 157         }
 158
 159         vv->video_status = STATUS_OVERLAY;
 160         vv->video_fh = fh;
 161
 162         return 0;
 163 }
 164 EXPORT_SYMBOL_GPL(saa7146_start_preview);
 165
 166 int saa7146_stop_preview(struct saa7146_fh *fh)
 167 {
 168         struct saa7146_dev *dev = fh->dev;
 169         struct saa7146_vv *vv = dev->vv_data;
 170
 171         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
 172
 173         /* check if streaming capture is running */
 174         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 175                 DEB_D(("streaming capture is active.\n"));
 176                 return -EBUSY;
 177         }
 178
 179         /* check if overlay is running at all */
 180         if ((vv->video_status & STATUS_OVERLAY) == 0) {
 181                 DEB_D(("no active overlay.\n"));
 182                 return 0;
 183         }
 184
 185         if (vv->video_fh != fh) {
 186                 DEB_D(("overlay is active, but in another open.\n"));
 187                 return -EBUSY;
 188         }
 189
 190         vv->video_status = 0;
 191         vv->video_fh = NULL;
 192
 193         saa7146_disable_overlay(fh);
 194
 195         saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 196
 197         return 0;
 198 }
 199 EXPORT_SYMBOL_GPL(saa7146_stop_preview);
 200
 201 /********************************************************************************/
 202 /* device controls */
 203
 204 static struct v4l2_queryctrl controls[] = {
 205         {
 206                 .id             = V4L2_CID_BRIGHTNESS,
 207                 .name           = "Brightness",
 208                 .minimum        = 0,
 209                 .maximum        = 255,
 210                 .step           = 1,
 211                 .default_value  = 128,
 212                 .type           = V4L2_CTRL_TYPE_INTEGER,
 213                 .flags          = V4L2_CTRL_FLAG_SLIDER,
 214         },{
 215                 .id             = V4L2_CID_CONTRAST,
 216                 .name           = "Contrast",
 217                 .minimum        = 0,
 218                 .maximum        = 127,
 219                 .step           = 1,
 220                 .default_value  = 64,
 221                 .type           = V4L2_CTRL_TYPE_INTEGER,
 222                 .flags          = V4L2_CTRL_FLAG_SLIDER,
 223         },{
 224                 .id             = V4L2_CID_SATURATION,
 225                 .name           = "Saturation",
 226                 .minimum        = 0,
 227                 .maximum        = 127,
 228                 .step           = 1,
 229                 .default_value  = 64,
 230                 .type           = V4L2_CTRL_TYPE_INTEGER,
 231                 .flags          = V4L2_CTRL_FLAG_SLIDER,
 232         },{
 233                 .id             = V4L2_CID_VFLIP,
 234                 .name           = "Vertical Flip",
 235                 .minimum        = 0,
 236                 .maximum        = 1,
 237                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
 238         },{
 239                 .id             = V4L2_CID_HFLIP,
 240                 .name           = "Horizontal Flip",
 241                 .minimum        = 0,
 242                 .maximum        = 1,
 243                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
 244         },
 245 };
 246 static int NUM_CONTROLS = sizeof(controls)/sizeof(struct v4l2_queryctrl);
 247
 248 #define V4L2_CID_PRIVATE_LASTP1      (V4L2_CID_PRIVATE_BASE + 0)
 249
 250 static struct v4l2_queryctrl* ctrl_by_id(int id)
 251 {
 252         int i;
 253
 254         for (i = 0; i < NUM_CONTROLS; i++)
 255                 if (controls[i].id == id)
 256                         return controls+i;
 257         return NULL;
 258 }
 259
 260 /********************************************************************************/
 261 /* common pagetable functions */
 262
 263 static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
 264 {
 265         struct pci_dev *pci = dev->pci;
 266         struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
 267         struct scatterlist *list = dma->sglist;
 268         int length = dma->sglen;
 269         struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
 270
 271         DEB_EE(("dev:%p, buf:%p, sg_len:%d\n",dev,buf,length));
 272
 273         if( 0 != IS_PLANAR(sfmt->trans)) {
 274                 struct saa7146_pgtable *pt1 = &buf->pt[0];
 275                 struct saa7146_pgtable *pt2 = &buf->pt[1];
 276                 struct saa7146_pgtable *pt3 = &buf->pt[2];
 277                 __le32  *ptr1, *ptr2, *ptr3;
 278                 __le32 fill;
 279
 280                 int size = buf->fmt->width*buf->fmt->height;
 281                 int i,p,m1,m2,m3,o1,o2;
 282
 283                 switch( sfmt->depth ) {
 284                         case 12: {
 285                                 /* create some offsets inside the page table */
 286                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
 287                                 m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
 288                                 m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
 289                                 o1 = size%PAGE_SIZE;
 290                                 o2 = (size+(size/4))%PAGE_SIZE;
 291                                 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
 292                                 break;
 293                         }
 294                         case 16: {
 295                                 /* create some offsets inside the page table */
 296                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
 297                                 m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
 298                                 m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
 299                                 o1 = size%PAGE_SIZE;
 300                                 o2 = (size+(size/2))%PAGE_SIZE;
 301                                 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
 302                                 break;
 303                         }
 304                         default: {
 305                                 return -1;
 306                         }
 307                 }
 308
 309                 ptr1 = pt1->cpu;
 310                 ptr2 = pt2->cpu;
 311                 ptr3 = pt3->cpu;
 312
 313                 /* walk all pages, copy all page addresses to ptr1 */
 314                 for (i = 0; i < length; i++, list++) {
 315                         for (p = 0; p * 4096 < list->length; p++, ptr1++) {
 316                                 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
 317                         }
 318                 }
 319 /*
 320                 ptr1 = pt1->cpu;
 321                 for(j=0;j<40;j++) {
 322                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
 323                 }
 324 */
 325
 326                 /* if we have a user buffer, the first page may not be
 327                    aligned to a page boundary. */
 328                 pt1->offset = dma->sglist->offset;
 329                 pt2->offset = pt1->offset+o1;
 330                 pt3->offset = pt1->offset+o2;
 331
 332                 /* create video-dma2 page table */
 333                 ptr1 = pt1->cpu;
 334                 for(i = m1; i <= m2 ; i++, ptr2++) {
 335                         *ptr2 = ptr1[i];
 336                 }
 337                 fill = *(ptr2-1);
 338                 for(;i<1024;i++,ptr2++) {
 339                         *ptr2 = fill;
 340                 }
 341                 /* create video-dma3 page table */
 342                 ptr1 = pt1->cpu;
 343                 for(i = m2; i <= m3; i++,ptr3++) {
 344                         *ptr3 = ptr1[i];
 345                 }
 346                 fill = *(ptr3-1);
 347                 for(;i<1024;i++,ptr3++) {
 348                         *ptr3 = fill;
 349                 }
 350                 /* finally: finish up video-dma1 page table */
 351                 ptr1 = pt1->cpu+m1;
 352                 fill = pt1->cpu[m1];
 353                 for(i=m1;i<1024;i++,ptr1++) {
 354                         *ptr1 = fill;
 355                 }
 356 /*
 357                 ptr1 = pt1->cpu;
 358                 ptr2 = pt2->cpu;
 359                 ptr3 = pt3->cpu;
 360                 for(j=0;j<40;j++) {
 361                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
 362                 }
 363                 for(j=0;j<40;j++) {
 364                         printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
 365                 }
 366                 for(j=0;j<40;j++) {
 367                         printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
 368                 }
 369 */
 370         } else {
 371                 struct saa7146_pgtable *pt = &buf->pt[0];
 372                 return saa7146_pgtable_build_single(pci, pt, list, length);
 373         }
 374
 375         return 0;
 376 }
 377
 378
 379 /********************************************************************************/
 380 /* file operations */
 381
 382 static int video_begin(struct saa7146_fh *fh)
 383 {
 384         struct saa7146_dev *dev = fh->dev;
 385         struct saa7146_vv *vv = dev->vv_data;
 386         struct saa7146_format *fmt = NULL;
 387         unsigned int resource;
 388         int ret = 0, err = 0;
 389
 390         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
 391
 392         if ((vv->video_status & STATUS_CAPTURE) != 0) {
 393                 if (vv->video_fh == fh) {
 394                         DEB_S(("already capturing.\n"));
 395                         return 0;
 396                 }
 397                 DEB_S(("already capturing in another open.\n"));
 398                 return -EBUSY;
 399         }
 400
 401         if ((vv->video_status & STATUS_OVERLAY) != 0) {
 402                 DEB_S(("warning: suspending overlay video for streaming capture.\n"));
 403                 vv->ov_suspend = vv->video_fh;
 404                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
 405                 if (0 != err) {
 406                         DEB_D(("suspending video failed. aborting\n"));
 407                         return err;
 408                 }
 409         }
 410
 411         fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
 412         /* we need to have a valid format set here */
 413         BUG_ON(NULL == fmt);
 414
 415         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 416                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
 417         } else {
 418                 resource = RESOURCE_DMA1_HPS;
 419         }
 420
 421         ret = saa7146_res_get(fh, resource);
 422         if (0 == ret) {
 423                 DEB_S(("cannot get capture resource %d\n",resource));
 424                 if (vv->ov_suspend != NULL) {
 425                         saa7146_start_preview(vv->ov_suspend);
 426                         vv->ov_suspend = NULL;
 427                 }
 428                 return -EBUSY;
 429         }
 430
 431         /* clear out beginning of streaming bit (rps register 0)*/
 432         saa7146_write(dev, MC2, MASK_27 );
 433
 434         /* enable rps0 irqs */
 435         SAA7146_IER_ENABLE(dev, MASK_27);
 436
 437         vv->video_fh = fh;
 438         vv->video_status = STATUS_CAPTURE;
 439
 440         return 0;
 441 }
 442
 443 static int video_end(struct saa7146_fh *fh, struct file *file)
 444 {
 445         struct saa7146_dev *dev = fh->dev;
 446         struct saa7146_vv *vv = dev->vv_data;
 447         struct saa7146_format *fmt = NULL;
 448         unsigned long flags;
 449         unsigned int resource;
 450         u32 dmas = 0;
 451         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
 452
 453         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
 454                 DEB_S(("not capturing.\n"));
 455                 return 0;
 456         }
 457
 458         if (vv->video_fh != fh) {
 459                 DEB_S(("capturing, but in another open.\n"));
 460                 return -EBUSY;
 461         }
 462
 463         fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
 464         /* we need to have a valid format set here */
 465         BUG_ON(NULL == fmt);
 466
 467         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 468                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
 469                 dmas = MASK_22 | MASK_21 | MASK_20;
 470         } else {
 471                 resource = RESOURCE_DMA1_HPS;
 472                 dmas = MASK_22;
 473         }
 474         spin_lock_irqsave(&dev->slock,flags);
 475
 476         /* disable rps0  */
 477         saa7146_write(dev, MC1, MASK_28);
 478
 479         /* disable rps0 irqs */
 480         SAA7146_IER_DISABLE(dev, MASK_27);
 481
 482         /* shut down all used video dma transfers */
 483         saa7146_write(dev, MC1, dmas);
 484
 485         spin_unlock_irqrestore(&dev->slock, flags);
 486
 487         vv->video_fh = NULL;
 488         vv->video_status = 0;
 489
 490         saa7146_res_free(fh, resource);
 491
 492         if (vv->ov_suspend != NULL) {
 493                 saa7146_start_preview(vv->ov_suspend);
 494                 vv->ov_suspend = NULL;
 495         }
 496
 497         return 0;
 498 }
 499
 500 static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 501 {
 502         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 503
 504         strcpy((char *)cap->driver, "saa7146 v4l2");
 505         strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
 506         sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci));
 507         cap->version = SAA7146_VERSION_CODE;
 508         cap->capabilities =
 509                 V4L2_CAP_VIDEO_CAPTURE |
 510                 V4L2_CAP_VIDEO_OVERLAY |
 511                 V4L2_CAP_READWRITE |
 512                 V4L2_CAP_STREAMING;
 513         cap->capabilities |= dev->ext_vv_data->capabilities;
 514         return 0;
 515 }
 516
 517 static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
 518 {
 519         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 520         struct saa7146_vv *vv = dev->vv_data;
 521
 522         *fb = vv->ov_fb;
 523         fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
 524         return 0;
 525 }
 526
 527 static int vidioc_s_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
 528 {
 529         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 530         struct saa7146_vv *vv = dev->vv_data;
 531         struct saa7146_format *fmt;
 532
 533         DEB_EE(("VIDIOC_S_FBUF\n"));
 534
 535         if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
 536                 return -EPERM;
 537
 538         /* check args */
 539         fmt = format_by_fourcc(dev, fb->fmt.pixelformat);
 540         if (NULL == fmt)
 541                 return -EINVAL;
 542
 543         /* planar formats are not allowed for overlay video, clipping and video dma would clash */
 544         if (fmt->flags & FORMAT_IS_PLANAR)
 545                 DEB_S(("planar pixelformat '%4.4s' not allowed for overlay\n",
 546                                         (char *)&fmt->pixelformat));
 547
 548         /* check if overlay is running */
 549         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 550                 if (vv->video_fh != fh) {
 551                         DEB_D(("refusing to change framebuffer informations while overlay is active in another open.\n"));
 552                         return -EBUSY;
 553                 }
 554         }
 555
 556         mutex_lock(&dev->lock);
 557
 558         /* ok, accept it */
 559         vv->ov_fb = *fb;
 560         vv->ov_fmt = fmt;
 561         if (0 == vv->ov_fb.fmt.bytesperline)
 562                 vv->ov_fb.fmt.bytesperline =
 563                         vv->ov_fb.fmt.width * fmt->depth / 8;
 564
 565         mutex_unlock(&dev->lock);
 566         return 0;
 567 }
 568
 569 static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
 570 {
 571         if (f->index >= NUM_FORMATS)
 572                 return -EINVAL;
 573         strlcpy((char *)f->description, formats[f->index].name,
 574                         sizeof(f->description));
 575         f->pixelformat = formats[f->index].pixelformat;
 576         return 0;
 577 }
 578
 579 static int vidioc_queryctrl(struct file *file, void *fh, struct v4l2_queryctrl *c)
 580 {
 581         const struct v4l2_queryctrl *ctrl;
 582
 583         if ((c->id <  V4L2_CID_BASE ||
 584              c->id >= V4L2_CID_LASTP1) &&
 585             (c->id <  V4L2_CID_PRIVATE_BASE ||
 586              c->id >= V4L2_CID_PRIVATE_LASTP1))
 587                 return -EINVAL;
 588
 589         ctrl = ctrl_by_id(c->id);
 590         if (ctrl == NULL)
 591                 return -EINVAL;
 592
 593         DEB_EE(("VIDIOC_QUERYCTRL: id:%d\n", c->id));
 594         *c = *ctrl;
 595         return 0;
 596 }
 597
 598 static int vidioc_g_ctrl(struct file *file, void *fh, struct v4l2_control *c)
 599 {
 600         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 601         struct saa7146_vv *vv = dev->vv_data;
 602         const struct v4l2_queryctrl *ctrl;
 603         u32 value = 0;
 604
 605         ctrl = ctrl_by_id(c->id);
 606         if (NULL == ctrl)
 607                 return -EINVAL;
 608         switch (c->id) {
 609         case V4L2_CID_BRIGHTNESS:
 610                 value = saa7146_read(dev, BCS_CTRL);
 611                 c->value = 0xff & (value >> 24);
 612                 DEB_D(("V4L2_CID_BRIGHTNESS: %d\n", c->value));
 613                 break;
 614         case V4L2_CID_CONTRAST:
 615                 value = saa7146_read(dev, BCS_CTRL);
 616                 c->value = 0x7f & (value >> 16);
 617                 DEB_D(("V4L2_CID_CONTRAST: %d\n", c->value));
 618                 break;
 619         case V4L2_CID_SATURATION:
 620                 value = saa7146_read(dev, BCS_CTRL);
 621                 c->value = 0x7f & (value >> 0);
 622                 DEB_D(("V4L2_CID_SATURATION: %d\n", c->value));
 623                 break;
 624         case V4L2_CID_VFLIP:
 625                 c->value = vv->vflip;
 626                 DEB_D(("V4L2_CID_VFLIP: %d\n", c->value));
 627                 break;
 628         case V4L2_CID_HFLIP:
 629                 c->value = vv->hflip;
 630                 DEB_D(("V4L2_CID_HFLIP: %d\n", c->value));
 631                 break;
 632         default:
 633                 return -EINVAL;
 634         }
 635         return 0;
 636 }
 637
 638 static int vidioc_s_ctrl(struct file *file, void *fh, struct v4l2_control *c)
 639 {
 640         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 641         struct saa7146_vv *vv = dev->vv_data;
 642         const struct v4l2_queryctrl *ctrl;
 643
 644         ctrl = ctrl_by_id(c->id);
 645         if (NULL == ctrl) {
 646                 DEB_D(("unknown control %d\n", c->id));
 647                 return -EINVAL;
 648         }
 649
 650         mutex_lock(&dev->lock);
 651
 652         switch (ctrl->type) {
 653         case V4L2_CTRL_TYPE_BOOLEAN:
 654         case V4L2_CTRL_TYPE_MENU:
 655         case V4L2_CTRL_TYPE_INTEGER:
 656                 if (c->value < ctrl->minimum)
 657                         c->value = ctrl->minimum;
 658                 if (c->value > ctrl->maximum)
 659                         c->value = ctrl->maximum;
 660                 break;
 661         default:
 662                 /* nothing */;
 663         }
 664
 665         switch (c->id) {
 666         case V4L2_CID_BRIGHTNESS: {
 667                 u32 value = saa7146_read(dev, BCS_CTRL);
 668                 value &= 0x00ffffff;
 669                 value |= (c->value << 24);
 670                 saa7146_write(dev, BCS_CTRL, value);
 671                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 672                 break;
 673         }
 674         case V4L2_CID_CONTRAST: {
 675                 u32 value = saa7146_read(dev, BCS_CTRL);
 676                 value &= 0xff00ffff;
 677                 value |= (c->value << 16);
 678                 saa7146_write(dev, BCS_CTRL, value);
 679                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 680                 break;
 681         }
 682         case V4L2_CID_SATURATION: {
 683                 u32 value = saa7146_read(dev, BCS_CTRL);
 684                 value &= 0xffffff00;
 685                 value |= (c->value << 0);
 686                 saa7146_write(dev, BCS_CTRL, value);
 687                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 688                 break;
 689         }
 690         case V4L2_CID_HFLIP:
 691                 /* fixme: we can support changing VFLIP and HFLIP here... */
 692                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
 693                         DEB_D(("V4L2_CID_HFLIP while active capture.\n"));
 694                         mutex_unlock(&dev->lock);
 695                         return -EBUSY;
 696                 }
 697                 vv->hflip = c->value;
 698                 break;
 699         case V4L2_CID_VFLIP:
 700                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
 701                         DEB_D(("V4L2_CID_VFLIP while active capture.\n"));
 702                         mutex_unlock(&dev->lock);
 703                         return -EBUSY;
 704                 }
 705                 vv->vflip = c->value;
 706                 break;
 707         default:
 708                 mutex_unlock(&dev->lock);
 709                 return -EINVAL;
 710         }
 711         mutex_unlock(&dev->lock);
 712
 713         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 714                 saa7146_stop_preview(fh);
 715                 saa7146_start_preview(fh);
 716         }
 717         return 0;
 718 }
 719
 720 static int vidioc_g_parm(struct file *file, void *fh,
 721                 struct v4l2_streamparm *parm)
 722 {
 723         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 724         struct saa7146_vv *vv = dev->vv_data;
 725
 726         parm->parm.capture.readbuffers = 1;
 727         v4l2_video_std_frame_period(vv->standard->id,
 728                                     &parm->parm.capture.timeperframe);
 729         return 0;
 730 }
 731
 732 static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
 733 {
 734         f->fmt.pix = ((struct saa7146_fh *)fh)->video_fmt;
 735         return 0;
 736 }
 737
 738 static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
 739 {
 740         f->fmt.win = ((struct saa7146_fh *)fh)->ov.win;
 741         return 0;
 742 }
 743
 744 static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f)
 745 {
 746         f->fmt.vbi = ((struct saa7146_fh *)fh)->vbi_fmt;
 747         return 0;
 748 }
 749
 750 static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
 751 {
 752         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 753         struct saa7146_vv *vv = dev->vv_data;
 754         struct saa7146_format *fmt;
 755         enum v4l2_field field;
 756         int maxw, maxh;
 757         int calc_bpl;
 758
 759         DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh));
 760
 761         fmt = format_by_fourcc(dev, f->fmt.pix.pixelformat);
 762         if (NULL == fmt)
 763                 return -EINVAL;
 764
 765         field = f->fmt.pix.field;
 766         maxw  = vv->standard->h_max_out;
 767         maxh  = vv->standard->v_max_out;
 768
 769         if (V4L2_FIELD_ANY == field) {
 770                 field = (f->fmt.pix.height > maxh / 2)
 771                         ? V4L2_FIELD_INTERLACED
 772                         : V4L2_FIELD_BOTTOM;
 773         }
 774         switch (field) {
 775         case V4L2_FIELD_ALTERNATE:
 776                 vv->last_field = V4L2_FIELD_TOP;
 777                 maxh = maxh / 2;
 778                 break;
 779         case V4L2_FIELD_TOP:
 780         case V4L2_FIELD_BOTTOM:
 781                 vv->last_field = V4L2_FIELD_INTERLACED;
 782                 maxh = maxh / 2;
 783                 break;
 784         case V4L2_FIELD_INTERLACED:
 785                 vv->last_field = V4L2_FIELD_INTERLACED;
 786                 break;
 787         default:
 788                 DEB_D(("no known field mode '%d'.\n", field));
 789                 return -EINVAL;
 790         }
 791
 792         f->fmt.pix.field = field;
 793         if (f->fmt.pix.width > maxw)
 794                 f->fmt.pix.width = maxw;
 795         if (f->fmt.pix.height > maxh)
 796                 f->fmt.pix.height = maxh;
 797
 798         calc_bpl = (f->fmt.pix.width * fmt->depth) / 8;
 799
 800         if (f->fmt.pix.bytesperline < calc_bpl)
 801                 f->fmt.pix.bytesperline = calc_bpl;
 802
 803         if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */
 804                 f->fmt.pix.bytesperline = calc_bpl;
 805
 806         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
 807         DEB_D(("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n", f->fmt.pix.width,
 808                         f->fmt.pix.height, f->fmt.pix.bytesperline, f->fmt.pix.sizeimage));
 809
 810         return 0;
 811 }
 812
 813
 814 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
 815 {
 816         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 817         struct saa7146_vv *vv = dev->vv_data;
 818         struct v4l2_window *win = &f->fmt.win;
 819         enum v4l2_field field;
 820         int maxw, maxh;
 821
 822         DEB_EE(("dev:%p\n", dev));
 823
 824         if (NULL == vv->ov_fb.base) {
 825                 DEB_D(("no fb base set.\n"));
 826                 return -EINVAL;
 827         }
 828         if (NULL == vv->ov_fmt) {
 829                 DEB_D(("no fb fmt set.\n"));
 830                 return -EINVAL;
 831         }
 832         if (win->w.width < 48 || win->w.height < 32) {
 833                 DEB_D(("min width/height. (%d,%d)\n", win->w.width, win->w.height));
 834                 return -EINVAL;
 835         }
 836         if (win->clipcount > 16) {
 837                 DEB_D(("clipcount too big.\n"));
 838                 return -EINVAL;
 839         }
 840
 841         field = win->field;
 842         maxw  = vv->standard->h_max_out;
 843         maxh  = vv->standard->v_max_out;
 844
 845         if (V4L2_FIELD_ANY == field) {
 846                 field = (win->w.height > maxh / 2)
 847                         ? V4L2_FIELD_INTERLACED
 848                         : V4L2_FIELD_TOP;
 849                 }
 850         switch (field) {
 851         case V4L2_FIELD_TOP:
 852         case V4L2_FIELD_BOTTOM:
 853         case V4L2_FIELD_ALTERNATE:
 854                 maxh = maxh / 2;
 855                 break;
 856         case V4L2_FIELD_INTERLACED:
 857                 break;
 858         default:
 859                 DEB_D(("no known field mode '%d'.\n", field));
 860                 return -EINVAL;
 861         }
 862
 863         win->field = field;
 864         if (win->w.width > maxw)
 865                 win->w.width = maxw;
 866         if (win->w.height > maxh)
 867                 win->w.height = maxh;
 868
 869         return 0;
 870 }
 871
 872 static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f)
 873 {
 874         struct saa7146_fh *fh = __fh;
 875         struct saa7146_dev *dev = fh->dev;
 876         struct saa7146_vv *vv = dev->vv_data;
 877         int err;
 878
 879         DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh));
 880         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 881                 DEB_EE(("streaming capture is active\n"));
 882                 return -EBUSY;
 883         }
 884         err = vidioc_try_fmt_vid_cap(file, fh, f);
 885         if (0 != err)
 886                 return err;
 887         fh->video_fmt = f->fmt.pix;
 888         DEB_EE(("set to pixelformat '%4.4s'\n", (char *)&fh->video_fmt.pixelformat));
 889         return 0;
 890 }
 891
 892 static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f)
 893 {
 894         struct saa7146_fh *fh = __fh;
 895         struct saa7146_dev *dev = fh->dev;
 896         struct saa7146_vv *vv = dev->vv_data;
 897         int err;
 898
 899         DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh));
 900         err = vidioc_try_fmt_vid_overlay(file, fh, f);
 901         if (0 != err)
 902                 return err;
 903         mutex_lock(&dev->lock);
 904         fh->ov.win    = f->fmt.win;
 905         fh->ov.nclips = f->fmt.win.clipcount;
 906         if (fh->ov.nclips > 16)
 907                 fh->ov.nclips = 16;
 908         if (copy_from_user(fh->ov.clips, f->fmt.win.clips,
 909                                 sizeof(struct v4l2_clip) * fh->ov.nclips)) {
 910                 mutex_unlock(&dev->lock);
 911                 return -EFAULT;
 912         }
 913
 914         /* fh->ov.fh is used to indicate that we have valid overlay informations, too */
 915         fh->ov.fh = fh;
 916
 917         mutex_unlock(&dev->lock);
 918
 919         /* check if our current overlay is active */
 920         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 921                 saa7146_stop_preview(fh);
 922                 saa7146_start_preview(fh);
 923         }
 924         return 0;
 925 }
 926
 927 static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm)
 928 {
 929         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 930         struct saa7146_vv *vv = dev->vv_data;
 931
 932         *norm = vv->standard->id;
 933         return 0;
 934 }
 935
 936         /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
 937            PAL / NTSC / SECAM. if your hardware does not (or does more)
 938            -- override this function in your extension */
 939 /*
 940         case VIDIOC_ENUMSTD:
 941         {
 942                 struct v4l2_standard *e = arg;
 943                 if (e->index < 0 )
 944                         return -EINVAL;
 945                 if( e->index < dev->ext_vv_data->num_stds ) {
 946                         DEB_EE(("VIDIOC_ENUMSTD: index:%d\n",e->index));
 947                         v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
 948                         return 0;
 949                 }
 950                 return -EINVAL;
 951         }
 952         */
 953
 954 static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id *id)
 955 {
 956         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 957         struct saa7146_vv *vv = dev->vv_data;
 958         int found = 0;
 959         int err, i;
 960
 961         DEB_EE(("VIDIOC_S_STD\n"));
 962
 963         if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
 964                 DEB_D(("cannot change video standard while streaming capture is active\n"));
 965                 return -EBUSY;
 966         }
 967
 968         if ((vv->video_status & STATUS_OVERLAY) != 0) {
 969                 vv->ov_suspend = vv->video_fh;
 970                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
 971                 if (0 != err) {
 972                         DEB_D(("suspending video failed. aborting\n"));
 973                         return err;
 974                 }
 975         }
 976
 977         mutex_lock(&dev->lock);
 978
 979         for (i = 0; i < dev->ext_vv_data->num_stds; i++)
 980                 if (*id & dev->ext_vv_data->stds[i].id)
 981                         break;
 982         if (i != dev->ext_vv_data->num_stds) {
 983                 vv->standard = &dev->ext_vv_data->stds[i];
 984                 if (NULL != dev->ext_vv_data->std_callback)
 985                         dev->ext_vv_data->std_callback(dev, vv->standard);
 986                 found = 1;
 987         }
 988
 989         mutex_unlock(&dev->lock);
 990
 991         if (vv->ov_suspend != NULL) {
 992                 saa7146_start_preview(vv->ov_suspend);
 993                 vv->ov_suspend = NULL;
 994         }
 995
 996         if (!found) {
 997                 DEB_EE(("VIDIOC_S_STD: standard not found.\n"));
 998                 return -EINVAL;
 999         }
1000
1001         DEB_EE(("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name));
1002         return 0;
1003 }
1004
1005 static int vidioc_overlay(struct file *file, void *fh, unsigned int on)
1006 {
1007         int err;
1008
1009         DEB_D(("VIDIOC_OVERLAY on:%d\n", on));
1010         if (on)
1011                 err = saa7146_start_preview(fh);
1012         else
1013                 err = saa7146_stop_preview(fh);
1014         return err;
1015 }
1016
1017 static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b)
1018 {
1019         struct saa7146_fh *fh = __fh;
1020
1021         if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1022                 return videobuf_reqbufs(&fh->video_q, b);
1023         if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1024                 return videobuf_reqbufs(&fh->vbi_q, b);
1025         return -EINVAL;
1026 }
1027
1028 static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1029 {
1030         struct saa7146_fh *fh = __fh;
1031
1032         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1033                 return videobuf_querybuf(&fh->video_q, buf);
1034         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1035                 return videobuf_querybuf(&fh->vbi_q, buf);
1036         return -EINVAL;
1037 }
1038
1039 static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1040 {
1041         struct saa7146_fh *fh = __fh;
1042
1043         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1044                 return videobuf_qbuf(&fh->video_q, buf);
1045         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1046                 return videobuf_qbuf(&fh->vbi_q, buf);
1047         return -EINVAL;
1048 }
1049
1050 static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1051 {
1052         struct saa7146_fh *fh = __fh;
1053
1054         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1055                 return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK);
1056         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1057                 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK);
1058         return -EINVAL;
1059 }
1060
1061 static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
1062 {
1063         struct saa7146_fh *fh = __fh;
1064         int err;
1065
1066         DEB_D(("VIDIOC_STREAMON, type:%d\n", type));
1067
1068         err = video_begin(fh);
1069         if (err)
1070                 return err;
1071         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1072                 return videobuf_streamon(&fh->video_q);
1073         if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1074                 return videobuf_streamon(&fh->vbi_q);
1075         return -EINVAL;
1076 }
1077
1078 static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
1079 {
1080         struct saa7146_fh *fh = __fh;
1081         struct saa7146_dev *dev = fh->dev;
1082         struct saa7146_vv *vv = dev->vv_data;
1083         int err;
1084
1085         DEB_D(("VIDIOC_STREAMOFF, type:%d\n", type));
1086
1087         /* ugly: we need to copy some checks from video_end(),
1088            because videobuf_streamoff() relies on the capture running.
1089            check and fix this */
1090         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
1091                 DEB_S(("not capturing.\n"));
1092                 return 0;
1093         }
1094
1095         if (vv->video_fh != fh) {
1096                 DEB_S(("capturing, but in another open.\n"));
1097                 return -EBUSY;
1098         }
1099
1100         err = -EINVAL;
1101         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1102                 err = videobuf_streamoff(&fh->video_q);
1103         else if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1104                 err = videobuf_streamoff(&fh->vbi_q);
1105         if (0 != err) {
1106                 DEB_D(("warning: videobuf_streamoff() failed.\n"));
1107                 video_end(fh, file);
1108         } else {
1109                 err = video_end(fh, file);
1110         }
1111         return err;
1112 }
1113
1114 static int vidioc_g_chip_ident(struct file *file, void *__fh,
1115                 struct v4l2_dbg_chip_ident *chip)
1116 {
1117         struct saa7146_fh *fh = __fh;
1118         struct saa7146_dev *dev = fh->dev;
1119
1120         chip->ident = V4L2_IDENT_NONE;
1121         chip->revision = 0;
1122         if (chip->match.type == V4L2_CHIP_MATCH_HOST && !chip->match.addr) {
1123                 chip->ident = V4L2_IDENT_SAA7146;
1124                 return 0;
1125         }
1126         return v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1127                         core, g_chip_ident, chip);
1128 }
1129
1130 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1131 static int vidiocgmbuf(struct file *file, void *__fh, struct video_mbuf *mbuf)
1132 {
1133         struct saa7146_fh *fh = __fh;
1134         struct videobuf_queue *q = &fh->video_q;
1135         int err, i;
1136
1137         /* fixme: number of capture buffers and sizes for v4l apps */
1138         int gbuffers = 2;
1139         int gbufsize = 768 * 576 * 4;
1140
1141         DEB_D(("VIDIOCGMBUF \n"));
1142
1143         q = &fh->video_q;
1144         err = videobuf_mmap_setup(q, gbuffers, gbufsize,
1145                         V4L2_MEMORY_MMAP);
1146         if (err < 0)
1147                 return err;
1148
1149         gbuffers = err;
1150         memset(mbuf, 0, sizeof(*mbuf));
1151         mbuf->frames = gbuffers;
1152         mbuf->size   = gbuffers * gbufsize;
1153         for (i = 0; i < gbuffers; i++)
1154                 mbuf->offsets[i] = i * gbufsize;
1155         return 0;
1156 }
1157 #endif
1158
1159 const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
1160         .vidioc_querycap             = vidioc_querycap,
1161         .vidioc_enum_fmt_vid_cap     = vidioc_enum_fmt_vid_cap,
1162         .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap,
1163         .vidioc_g_fmt_vid_cap        = vidioc_g_fmt_vid_cap,
1164         .vidioc_try_fmt_vid_cap      = vidioc_try_fmt_vid_cap,
1165         .vidioc_s_fmt_vid_cap        = vidioc_s_fmt_vid_cap,
1166         .vidioc_g_fmt_vid_overlay    = vidioc_g_fmt_vid_overlay,
1167         .vidioc_try_fmt_vid_overlay  = vidioc_try_fmt_vid_overlay,
1168         .vidioc_s_fmt_vid_overlay    = vidioc_s_fmt_vid_overlay,
1169         .vidioc_g_fmt_vbi_cap        = vidioc_g_fmt_vbi_cap,
1170         .vidioc_g_chip_ident         = vidioc_g_chip_ident,
1171
1172         .vidioc_overlay              = vidioc_overlay,
1173         .vidioc_g_fbuf               = vidioc_g_fbuf,
1174         .vidioc_s_fbuf               = vidioc_s_fbuf,
1175         .vidioc_reqbufs              = vidioc_reqbufs,
1176         .vidioc_querybuf             = vidioc_querybuf,
1177         .vidioc_qbuf                 = vidioc_qbuf,
1178         .vidioc_dqbuf                = vidioc_dqbuf,
1179         .vidioc_g_std                = vidioc_g_std,
1180         .vidioc_s_std                = vidioc_s_std,
1181         .vidioc_queryctrl            = vidioc_queryctrl,
1182         .vidioc_g_ctrl               = vidioc_g_ctrl,
1183         .vidioc_s_ctrl               = vidioc_s_ctrl,
1184         .vidioc_streamon             = vidioc_streamon,
1185         .vidioc_streamoff            = vidioc_streamoff,
1186         .vidioc_g_parm               = vidioc_g_parm,
1187 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1188         .vidiocgmbuf                 = vidiocgmbuf,
1189 #endif
1190 };
1191
1192 /*********************************************************************************/
1193 /* buffer handling functions                                                  */
1194
1195 static int buffer_activate (struct saa7146_dev *dev,
1196                      struct saa7146_buf *buf,
1197                      struct saa7146_buf *next)
1198 {
1199         struct saa7146_vv *vv = dev->vv_data;
1200
1201         buf->vb.state = VIDEOBUF_ACTIVE;
1202         saa7146_set_capture(dev,buf,next);
1203
1204         mod_timer(&vv->video_q.timeout, jiffies+BUFFER_TIMEOUT);
1205         return 0;
1206 }
1207
1208 static int buffer_prepare(struct videobuf_queue *q,
1209                           struct videobuf_buffer *vb, enum v4l2_field field)
1210 {
1211         struct file *file = q->priv_data;
1212         struct saa7146_fh *fh = file->private_data;
1213         struct saa7146_dev *dev = fh->dev;
1214         struct saa7146_vv *vv = dev->vv_data;
1215         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1216         int size,err = 0;
1217
1218         DEB_CAP(("vbuf:%p\n",vb));
1219
1220         /* sanity checks */
1221         if (fh->video_fmt.width  < 48 ||
1222             fh->video_fmt.height < 32 ||
1223             fh->video_fmt.width  > vv->standard->h_max_out ||
1224             fh->video_fmt.height > vv->standard->v_max_out) {
1225                 DEB_D(("w (%d) / h (%d) out of bounds.\n",fh->video_fmt.width,fh->video_fmt.height));
1226                 return -EINVAL;
1227         }
1228
1229         size = fh->video_fmt.sizeimage;
1230         if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1231                 DEB_D(("size mismatch.\n"));
1232                 return -EINVAL;
1233         }
1234
1235         DEB_CAP(("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1236                 fh->video_fmt.width,fh->video_fmt.height,size,v4l2_field_names[fh->video_fmt.field]));
1237         if (buf->vb.width  != fh->video_fmt.width  ||
1238             buf->vb.bytesperline != fh->video_fmt.bytesperline ||
1239             buf->vb.height != fh->video_fmt.height ||
1240             buf->vb.size   != size ||
1241             buf->vb.field  != field      ||
1242             buf->vb.field  != fh->video_fmt.field  ||
1243             buf->fmt       != &fh->video_fmt) {
1244                 saa7146_dma_free(dev,q,buf);
1245         }
1246
1247         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1248                 struct saa7146_format *sfmt;
1249
1250                 buf->vb.bytesperline  = fh->video_fmt.bytesperline;
1251                 buf->vb.width  = fh->video_fmt.width;
1252                 buf->vb.height = fh->video_fmt.height;
1253                 buf->vb.size   = size;
1254                 buf->vb.field  = field;
1255                 buf->fmt       = &fh->video_fmt;
1256                 buf->vb.field  = fh->video_fmt.field;
1257
1258                 sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
1259
1260                 if( 0 != IS_PLANAR(sfmt->trans)) {
1261                         saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1262                         saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1263                         saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1264
1265                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1266                         saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1267                         saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1268                 } else {
1269                         saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1270                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1271                 }
1272
1273                 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1274                 if (err)
1275                         goto oops;
1276                 err = saa7146_pgtable_build(dev,buf);
1277                 if (err)
1278                         goto oops;
1279         }
1280         buf->vb.state = VIDEOBUF_PREPARED;
1281         buf->activate = buffer_activate;
1282
1283         return 0;
1284
1285  oops:
1286         DEB_D(("error out.\n"));
1287         saa7146_dma_free(dev,q,buf);
1288
1289         return err;
1290 }
1291
1292 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1293 {
1294         struct file *file = q->priv_data;
1295         struct saa7146_fh *fh = file->private_data;
1296
1297         if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1298                 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1299
1300         *size = fh->video_fmt.sizeimage;
1301
1302         /* check if we exceed the "max_memory" parameter */
1303         if( (*count * *size) > (max_memory*1048576) ) {
1304                 *count = (max_memory*1048576) / *size;
1305         }
1306
1307         DEB_CAP(("%d buffers, %d bytes each.\n",*count,*size));
1308
1309         return 0;
1310 }
1311
1312 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1313 {
1314         struct file *file = q->priv_data;
1315         struct saa7146_fh *fh = file->private_data;
1316         struct saa7146_dev *dev = fh->dev;
1317         struct saa7146_vv *vv = dev->vv_data;
1318         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1319
1320         DEB_CAP(("vbuf:%p\n",vb));
1321         saa7146_buffer_queue(fh->dev,&vv->video_q,buf);
1322 }
1323
1324 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1325 {
1326         struct file *file = q->priv_data;
1327         struct saa7146_fh *fh = file->private_data;
1328         struct saa7146_dev *dev = fh->dev;
1329         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1330
1331         DEB_CAP(("vbuf:%p\n",vb));
1332         saa7146_dma_free(dev,q,buf);
1333 }
1334
1335 static struct videobuf_queue_ops video_qops = {
1336         .buf_setup    = buffer_setup,
1337         .buf_prepare  = buffer_prepare,
1338         .buf_queue    = buffer_queue,
1339         .buf_release  = buffer_release,
1340 };
1341
1342 /********************************************************************************/
1343 /* file operations */
1344
1345 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1346 {
1347         INIT_LIST_HEAD(&vv->video_q.queue);
1348
1349         init_timer(&vv->video_q.timeout);
1350         vv->video_q.timeout.function = saa7146_buffer_timeout;
1351         vv->video_q.timeout.data     = (unsigned long)(&vv->video_q);
1352         vv->video_q.dev              = dev;
1353
1354         /* set some default values */
1355         vv->standard = &dev->ext_vv_data->stds[0];
1356
1357         /* FIXME: what's this? */
1358         vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1359         vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1360 }
1361
1362
1363 static int video_open(struct saa7146_dev *dev, struct file *file)
1364 {
1365         struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1366         struct saa7146_format *sfmt;
1367
1368         fh->video_fmt.width = 384;
1369         fh->video_fmt.height = 288;
1370         fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24;
1371         fh->video_fmt.bytesperline = 0;
1372         fh->video_fmt.field = V4L2_FIELD_ANY;
1373         sfmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
1374         fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8;
1375
1376         videobuf_queue_sg_init(&fh->video_q, &video_qops,
1377                             &dev->pci->dev, &dev->slock,
1378                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
1379                             V4L2_FIELD_INTERLACED,
1380                             sizeof(struct saa7146_buf),
1381                             file);
1382
1383         return 0;
1384 }
1385
1386
1387 static void video_close(struct saa7146_dev *dev, struct file *file)
1388 {
1389         struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1390         struct saa7146_vv *vv = dev->vv_data;
1391         struct videobuf_queue *q = &fh->video_q;
1392         int err;
1393
1394         if (IS_CAPTURE_ACTIVE(fh) != 0) {
1395                 err = video_end(fh, file);
1396         } else if (IS_OVERLAY_ACTIVE(fh) != 0) {
1397                 err = saa7146_stop_preview(fh);
1398         }
1399
1400         videobuf_stop(q);
1401
1402         /* hmm, why is this function declared void? */
1403         /* return err */
1404 }
1405
1406
1407 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1408 {
1409         struct saa7146_vv *vv = dev->vv_data;
1410         struct saa7146_dmaqueue *q = &vv->video_q;
1411
1412         spin_lock(&dev->slock);
1413         DEB_CAP(("called.\n"));
1414
1415         /* only finish the buffer if we have one... */
1416         if( NULL != q->curr ) {
1417                 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1418         }
1419         saa7146_buffer_next(dev,q,0);
1420
1421         spin_unlock(&dev->slock);
1422 }
1423
1424 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1425 {
1426         struct saa7146_fh *fh = file->private_data;
1427         struct saa7146_dev *dev = fh->dev;
1428         struct saa7146_vv *vv = dev->vv_data;
1429         ssize_t ret = 0;
1430
1431         DEB_EE(("called.\n"));
1432
1433         if ((vv->video_status & STATUS_CAPTURE) != 0) {
1434                 /* fixme: should we allow read() captures while streaming capture? */
1435                 if (vv->video_fh == fh) {
1436                         DEB_S(("already capturing.\n"));
1437                         return -EBUSY;
1438                 }
1439                 DEB_S(("already capturing in another open.\n"));
1440                 return -EBUSY;
1441         }
1442
1443         ret = video_begin(fh);
1444         if( 0 != ret) {
1445                 goto out;
1446         }
1447
1448         ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1449                                 file->f_flags & O_NONBLOCK);
1450         if (ret != 0) {
1451                 video_end(fh, file);
1452         } else {
1453                 ret = video_end(fh, file);
1454         }
1455 out:
1456         /* restart overlay if it was active before */
1457         if (vv->ov_suspend != NULL) {
1458                 saa7146_start_preview(vv->ov_suspend);
1459                 vv->ov_suspend = NULL;
1460         }
1461
1462         return ret;
1463 }
1464
1465 struct saa7146_use_ops saa7146_video_uops = {
1466         .init = video_init,
1467         .open = video_open,
1468         .release = video_close,
1469         .irq_done = video_irq_done,
1470         .read = video_read,
1471 };