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