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* saa7146_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 = saa7146_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 = saa7146_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 = saa7146_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 = saa7146_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         /* ok, accept it */
 557         vv->ov_fb = *fb;
 558         vv->ov_fmt = fmt;
 559
 560         if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) {
 561                 vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8;
 562                 DEB_D(("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline));
 563         }
 564         return 0;
 565 }
 566
 567 static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
 568 {
 569         if (f->index >= NUM_FORMATS)
 570                 return -EINVAL;
 571         strlcpy((char *)f->description, formats[f->index].name,
 572                         sizeof(f->description));
 573         f->pixelformat = formats[f->index].pixelformat;
 574         return 0;
 575 }
 576
 577 static int vidioc_queryctrl(struct file *file, void *fh, struct v4l2_queryctrl *c)
 578 {
 579         const struct v4l2_queryctrl *ctrl;
 580
 581         if ((c->id <  V4L2_CID_BASE ||
 582              c->id >= V4L2_CID_LASTP1) &&
 583             (c->id <  V4L2_CID_PRIVATE_BASE ||
 584              c->id >= V4L2_CID_PRIVATE_LASTP1))
 585                 return -EINVAL;
 586
 587         ctrl = ctrl_by_id(c->id);
 588         if (ctrl == NULL)
 589                 return -EINVAL;
 590
 591         DEB_EE(("VIDIOC_QUERYCTRL: id:%d\n", c->id));
 592         *c = *ctrl;
 593         return 0;
 594 }
 595
 596 static int vidioc_g_ctrl(struct file *file, void *fh, struct v4l2_control *c)
 597 {
 598         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 599         struct saa7146_vv *vv = dev->vv_data;
 600         const struct v4l2_queryctrl *ctrl;
 601         u32 value = 0;
 602
 603         ctrl = ctrl_by_id(c->id);
 604         if (NULL == ctrl)
 605                 return -EINVAL;
 606         switch (c->id) {
 607         case V4L2_CID_BRIGHTNESS:
 608                 value = saa7146_read(dev, BCS_CTRL);
 609                 c->value = 0xff & (value >> 24);
 610                 DEB_D(("V4L2_CID_BRIGHTNESS: %d\n", c->value));
 611                 break;
 612         case V4L2_CID_CONTRAST:
 613                 value = saa7146_read(dev, BCS_CTRL);
 614                 c->value = 0x7f & (value >> 16);
 615                 DEB_D(("V4L2_CID_CONTRAST: %d\n", c->value));
 616                 break;
 617         case V4L2_CID_SATURATION:
 618                 value = saa7146_read(dev, BCS_CTRL);
 619                 c->value = 0x7f & (value >> 0);
 620                 DEB_D(("V4L2_CID_SATURATION: %d\n", c->value));
 621                 break;
 622         case V4L2_CID_VFLIP:
 623                 c->value = vv->vflip;
 624                 DEB_D(("V4L2_CID_VFLIP: %d\n", c->value));
 625                 break;
 626         case V4L2_CID_HFLIP:
 627                 c->value = vv->hflip;
 628                 DEB_D(("V4L2_CID_HFLIP: %d\n", c->value));
 629                 break;
 630         default:
 631                 return -EINVAL;
 632         }
 633         return 0;
 634 }
 635
 636 static int vidioc_s_ctrl(struct file *file, void *fh, struct v4l2_control *c)
 637 {
 638         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 639         struct saa7146_vv *vv = dev->vv_data;
 640         const struct v4l2_queryctrl *ctrl;
 641
 642         ctrl = ctrl_by_id(c->id);
 643         if (NULL == ctrl) {
 644                 DEB_D(("unknown control %d\n", c->id));
 645                 return -EINVAL;
 646         }
 647
 648         switch (ctrl->type) {
 649         case V4L2_CTRL_TYPE_BOOLEAN:
 650         case V4L2_CTRL_TYPE_MENU:
 651         case V4L2_CTRL_TYPE_INTEGER:
 652                 if (c->value < ctrl->minimum)
 653                         c->value = ctrl->minimum;
 654                 if (c->value > ctrl->maximum)
 655                         c->value = ctrl->maximum;
 656                 break;
 657         default:
 658                 /* nothing */;
 659         }
 660
 661         switch (c->id) {
 662         case V4L2_CID_BRIGHTNESS: {
 663                 u32 value = saa7146_read(dev, BCS_CTRL);
 664                 value &= 0x00ffffff;
 665                 value |= (c->value << 24);
 666                 saa7146_write(dev, BCS_CTRL, value);
 667                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 668                 break;
 669         }
 670         case V4L2_CID_CONTRAST: {
 671                 u32 value = saa7146_read(dev, BCS_CTRL);
 672                 value &= 0xff00ffff;
 673                 value |= (c->value << 16);
 674                 saa7146_write(dev, BCS_CTRL, value);
 675                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 676                 break;
 677         }
 678         case V4L2_CID_SATURATION: {
 679                 u32 value = saa7146_read(dev, BCS_CTRL);
 680                 value &= 0xffffff00;
 681                 value |= (c->value << 0);
 682                 saa7146_write(dev, BCS_CTRL, value);
 683                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 684                 break;
 685         }
 686         case V4L2_CID_HFLIP:
 687                 /* fixme: we can support changing VFLIP and HFLIP here... */
 688                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
 689                         DEB_D(("V4L2_CID_HFLIP while active capture.\n"));
 690                         return -EBUSY;
 691                 }
 692                 vv->hflip = c->value;
 693                 break;
 694         case V4L2_CID_VFLIP:
 695                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
 696                         DEB_D(("V4L2_CID_VFLIP while active capture.\n"));
 697                         return -EBUSY;
 698                 }
 699                 vv->vflip = c->value;
 700                 break;
 701         default:
 702                 return -EINVAL;
 703         }
 704
 705         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 706                 saa7146_stop_preview(fh);
 707                 saa7146_start_preview(fh);
 708         }
 709         return 0;
 710 }
 711
 712 static int vidioc_g_parm(struct file *file, void *fh,
 713                 struct v4l2_streamparm *parm)
 714 {
 715         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 716         struct saa7146_vv *vv = dev->vv_data;
 717
 718         parm->parm.capture.readbuffers = 1;
 719         v4l2_video_std_frame_period(vv->standard->id,
 720                                     &parm->parm.capture.timeperframe);
 721         return 0;
 722 }
 723
 724 static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
 725 {
 726         f->fmt.pix = ((struct saa7146_fh *)fh)->video_fmt;
 727         return 0;
 728 }
 729
 730 static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
 731 {
 732         f->fmt.win = ((struct saa7146_fh *)fh)->ov.win;
 733         return 0;
 734 }
 735
 736 static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f)
 737 {
 738         f->fmt.vbi = ((struct saa7146_fh *)fh)->vbi_fmt;
 739         return 0;
 740 }
 741
 742 static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
 743 {
 744         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 745         struct saa7146_vv *vv = dev->vv_data;
 746         struct saa7146_format *fmt;
 747         enum v4l2_field field;
 748         int maxw, maxh;
 749         int calc_bpl;
 750
 751         DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh));
 752
 753         fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat);
 754         if (NULL == fmt)
 755                 return -EINVAL;
 756
 757         field = f->fmt.pix.field;
 758         maxw  = vv->standard->h_max_out;
 759         maxh  = vv->standard->v_max_out;
 760
 761         if (V4L2_FIELD_ANY == field) {
 762                 field = (f->fmt.pix.height > maxh / 2)
 763                         ? V4L2_FIELD_INTERLACED
 764                         : V4L2_FIELD_BOTTOM;
 765         }
 766         switch (field) {
 767         case V4L2_FIELD_ALTERNATE:
 768                 vv->last_field = V4L2_FIELD_TOP;
 769                 maxh = maxh / 2;
 770                 break;
 771         case V4L2_FIELD_TOP:
 772         case V4L2_FIELD_BOTTOM:
 773                 vv->last_field = V4L2_FIELD_INTERLACED;
 774                 maxh = maxh / 2;
 775                 break;
 776         case V4L2_FIELD_INTERLACED:
 777                 vv->last_field = V4L2_FIELD_INTERLACED;
 778                 break;
 779         default:
 780                 DEB_D(("no known field mode '%d'.\n", field));
 781                 return -EINVAL;
 782         }
 783
 784         f->fmt.pix.field = field;
 785         if (f->fmt.pix.width > maxw)
 786                 f->fmt.pix.width = maxw;
 787         if (f->fmt.pix.height > maxh)
 788                 f->fmt.pix.height = maxh;
 789
 790         calc_bpl = (f->fmt.pix.width * fmt->depth) / 8;
 791
 792         if (f->fmt.pix.bytesperline < calc_bpl)
 793                 f->fmt.pix.bytesperline = calc_bpl;
 794
 795         if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */
 796                 f->fmt.pix.bytesperline = calc_bpl;
 797
 798         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
 799         DEB_D(("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n", f->fmt.pix.width,
 800                         f->fmt.pix.height, f->fmt.pix.bytesperline, f->fmt.pix.sizeimage));
 801
 802         return 0;
 803 }
 804
 805
 806 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
 807 {
 808         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 809         struct saa7146_vv *vv = dev->vv_data;
 810         struct v4l2_window *win = &f->fmt.win;
 811         enum v4l2_field field;
 812         int maxw, maxh;
 813
 814         DEB_EE(("dev:%p\n", dev));
 815
 816         if (NULL == vv->ov_fb.base) {
 817                 DEB_D(("no fb base set.\n"));
 818                 return -EINVAL;
 819         }
 820         if (NULL == vv->ov_fmt) {
 821                 DEB_D(("no fb fmt set.\n"));
 822                 return -EINVAL;
 823         }
 824         if (win->w.width < 48 || win->w.height < 32) {
 825                 DEB_D(("min width/height. (%d,%d)\n", win->w.width, win->w.height));
 826                 return -EINVAL;
 827         }
 828         if (win->clipcount > 16) {
 829                 DEB_D(("clipcount too big.\n"));
 830                 return -EINVAL;
 831         }
 832
 833         field = win->field;
 834         maxw  = vv->standard->h_max_out;
 835         maxh  = vv->standard->v_max_out;
 836
 837         if (V4L2_FIELD_ANY == field) {
 838                 field = (win->w.height > maxh / 2)
 839                         ? V4L2_FIELD_INTERLACED
 840                         : V4L2_FIELD_TOP;
 841                 }
 842         switch (field) {
 843         case V4L2_FIELD_TOP:
 844         case V4L2_FIELD_BOTTOM:
 845         case V4L2_FIELD_ALTERNATE:
 846                 maxh = maxh / 2;
 847                 break;
 848         case V4L2_FIELD_INTERLACED:
 849                 break;
 850         default:
 851                 DEB_D(("no known field mode '%d'.\n", field));
 852                 return -EINVAL;
 853         }
 854
 855         win->field = field;
 856         if (win->w.width > maxw)
 857                 win->w.width = maxw;
 858         if (win->w.height > maxh)
 859                 win->w.height = maxh;
 860
 861         return 0;
 862 }
 863
 864 static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f)
 865 {
 866         struct saa7146_fh *fh = __fh;
 867         struct saa7146_dev *dev = fh->dev;
 868         struct saa7146_vv *vv = dev->vv_data;
 869         int err;
 870
 871         DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh));
 872         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 873                 DEB_EE(("streaming capture is active\n"));
 874                 return -EBUSY;
 875         }
 876         err = vidioc_try_fmt_vid_cap(file, fh, f);
 877         if (0 != err)
 878                 return err;
 879         fh->video_fmt = f->fmt.pix;
 880         DEB_EE(("set to pixelformat '%4.4s'\n", (char *)&fh->video_fmt.pixelformat));
 881         return 0;
 882 }
 883
 884 static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f)
 885 {
 886         struct saa7146_fh *fh = __fh;
 887         struct saa7146_dev *dev = fh->dev;
 888         struct saa7146_vv *vv = dev->vv_data;
 889         int err;
 890
 891         DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh));
 892         err = vidioc_try_fmt_vid_overlay(file, fh, f);
 893         if (0 != err)
 894                 return err;
 895         fh->ov.win    = f->fmt.win;
 896         fh->ov.nclips = f->fmt.win.clipcount;
 897         if (fh->ov.nclips > 16)
 898                 fh->ov.nclips = 16;
 899         if (copy_from_user(fh->ov.clips, f->fmt.win.clips,
 900                                 sizeof(struct v4l2_clip) * fh->ov.nclips)) {
 901                 return -EFAULT;
 902         }
 903
 904         /* fh->ov.fh is used to indicate that we have valid overlay informations, too */
 905         fh->ov.fh = fh;
 906
 907         /* check if our current overlay is active */
 908         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 909                 saa7146_stop_preview(fh);
 910                 saa7146_start_preview(fh);
 911         }
 912         return 0;
 913 }
 914
 915 static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm)
 916 {
 917         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 918         struct saa7146_vv *vv = dev->vv_data;
 919
 920         *norm = vv->standard->id;
 921         return 0;
 922 }
 923
 924         /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
 925            PAL / NTSC / SECAM. if your hardware does not (or does more)
 926            -- override this function in your extension */
 927 /*
 928         case VIDIOC_ENUMSTD:
 929         {
 930                 struct v4l2_standard *e = arg;
 931                 if (e->index < 0 )
 932                         return -EINVAL;
 933                 if( e->index < dev->ext_vv_data->num_stds ) {
 934                         DEB_EE(("VIDIOC_ENUMSTD: index:%d\n",e->index));
 935                         v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
 936                         return 0;
 937                 }
 938                 return -EINVAL;
 939         }
 940         */
 941
 942 static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id *id)
 943 {
 944         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 945         struct saa7146_vv *vv = dev->vv_data;
 946         int found = 0;
 947         int err, i;
 948
 949         DEB_EE(("VIDIOC_S_STD\n"));
 950
 951         if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
 952                 DEB_D(("cannot change video standard while streaming capture is active\n"));
 953                 return -EBUSY;
 954         }
 955
 956         if ((vv->video_status & STATUS_OVERLAY) != 0) {
 957                 vv->ov_suspend = vv->video_fh;
 958                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
 959                 if (0 != err) {
 960                         DEB_D(("suspending video failed. aborting\n"));
 961                         return err;
 962                 }
 963         }
 964
 965         for (i = 0; i < dev->ext_vv_data->num_stds; i++)
 966                 if (*id & dev->ext_vv_data->stds[i].id)
 967                         break;
 968         if (i != dev->ext_vv_data->num_stds) {
 969                 vv->standard = &dev->ext_vv_data->stds[i];
 970                 if (NULL != dev->ext_vv_data->std_callback)
 971                         dev->ext_vv_data->std_callback(dev, vv->standard);
 972                 found = 1;
 973         }
 974
 975         if (vv->ov_suspend != NULL) {
 976                 saa7146_start_preview(vv->ov_suspend);
 977                 vv->ov_suspend = NULL;
 978         }
 979
 980         if (!found) {
 981                 DEB_EE(("VIDIOC_S_STD: standard not found.\n"));
 982                 return -EINVAL;
 983         }
 984
 985         DEB_EE(("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name));
 986         return 0;
 987 }
 988
 989 static int vidioc_overlay(struct file *file, void *fh, unsigned int on)
 990 {
 991         int err;
 992
 993         DEB_D(("VIDIOC_OVERLAY on:%d\n", on));
 994         if (on)
 995                 err = saa7146_start_preview(fh);
 996         else
 997                 err = saa7146_stop_preview(fh);
 998         return err;
 999 }
1000
1001 static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b)
1002 {
1003         struct saa7146_fh *fh = __fh;
1004
1005         if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1006                 return videobuf_reqbufs(&fh->video_q, b);
1007         if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1008                 return videobuf_reqbufs(&fh->vbi_q, b);
1009         return -EINVAL;
1010 }
1011
1012 static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1013 {
1014         struct saa7146_fh *fh = __fh;
1015
1016         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1017                 return videobuf_querybuf(&fh->video_q, buf);
1018         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1019                 return videobuf_querybuf(&fh->vbi_q, buf);
1020         return -EINVAL;
1021 }
1022
1023 static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1024 {
1025         struct saa7146_fh *fh = __fh;
1026
1027         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1028                 return videobuf_qbuf(&fh->video_q, buf);
1029         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1030                 return videobuf_qbuf(&fh->vbi_q, buf);
1031         return -EINVAL;
1032 }
1033
1034 static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1035 {
1036         struct saa7146_fh *fh = __fh;
1037
1038         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1039                 return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK);
1040         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1041                 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK);
1042         return -EINVAL;
1043 }
1044
1045 static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
1046 {
1047         struct saa7146_fh *fh = __fh;
1048         int err;
1049
1050         DEB_D(("VIDIOC_STREAMON, type:%d\n", type));
1051
1052         err = video_begin(fh);
1053         if (err)
1054                 return err;
1055         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1056                 return videobuf_streamon(&fh->video_q);
1057         if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1058                 return videobuf_streamon(&fh->vbi_q);
1059         return -EINVAL;
1060 }
1061
1062 static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
1063 {
1064         struct saa7146_fh *fh = __fh;
1065         struct saa7146_dev *dev = fh->dev;
1066         struct saa7146_vv *vv = dev->vv_data;
1067         int err;
1068
1069         DEB_D(("VIDIOC_STREAMOFF, type:%d\n", type));
1070
1071         /* ugly: we need to copy some checks from video_end(),
1072            because videobuf_streamoff() relies on the capture running.
1073            check and fix this */
1074         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
1075                 DEB_S(("not capturing.\n"));
1076                 return 0;
1077         }
1078
1079         if (vv->video_fh != fh) {
1080                 DEB_S(("capturing, but in another open.\n"));
1081                 return -EBUSY;
1082         }
1083
1084         err = -EINVAL;
1085         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1086                 err = videobuf_streamoff(&fh->video_q);
1087         else if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1088                 err = videobuf_streamoff(&fh->vbi_q);
1089         if (0 != err) {
1090                 DEB_D(("warning: videobuf_streamoff() failed.\n"));
1091                 video_end(fh, file);
1092         } else {
1093                 err = video_end(fh, file);
1094         }
1095         return err;
1096 }
1097
1098 static int vidioc_g_chip_ident(struct file *file, void *__fh,
1099                 struct v4l2_dbg_chip_ident *chip)
1100 {
1101         struct saa7146_fh *fh = __fh;
1102         struct saa7146_dev *dev = fh->dev;
1103
1104         chip->ident = V4L2_IDENT_NONE;
1105         chip->revision = 0;
1106         if (chip->match.type == V4L2_CHIP_MATCH_HOST && !chip->match.addr) {
1107                 chip->ident = V4L2_IDENT_SAA7146;
1108                 return 0;
1109         }
1110         return v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1111                         core, g_chip_ident, chip);
1112 }
1113
1114 const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
1115         .vidioc_querycap             = vidioc_querycap,
1116         .vidioc_enum_fmt_vid_cap     = vidioc_enum_fmt_vid_cap,
1117         .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap,
1118         .vidioc_g_fmt_vid_cap        = vidioc_g_fmt_vid_cap,
1119         .vidioc_try_fmt_vid_cap      = vidioc_try_fmt_vid_cap,
1120         .vidioc_s_fmt_vid_cap        = vidioc_s_fmt_vid_cap,
1121         .vidioc_g_fmt_vid_overlay    = vidioc_g_fmt_vid_overlay,
1122         .vidioc_try_fmt_vid_overlay  = vidioc_try_fmt_vid_overlay,
1123         .vidioc_s_fmt_vid_overlay    = vidioc_s_fmt_vid_overlay,
1124         .vidioc_g_fmt_vbi_cap        = vidioc_g_fmt_vbi_cap,
1125         .vidioc_g_chip_ident         = vidioc_g_chip_ident,
1126
1127         .vidioc_overlay              = vidioc_overlay,
1128         .vidioc_g_fbuf               = vidioc_g_fbuf,
1129         .vidioc_s_fbuf               = vidioc_s_fbuf,
1130         .vidioc_reqbufs              = vidioc_reqbufs,
1131         .vidioc_querybuf             = vidioc_querybuf,
1132         .vidioc_qbuf                 = vidioc_qbuf,
1133         .vidioc_dqbuf                = vidioc_dqbuf,
1134         .vidioc_g_std                = vidioc_g_std,
1135         .vidioc_s_std                = vidioc_s_std,
1136         .vidioc_queryctrl            = vidioc_queryctrl,
1137         .vidioc_g_ctrl               = vidioc_g_ctrl,
1138         .vidioc_s_ctrl               = vidioc_s_ctrl,
1139         .vidioc_streamon             = vidioc_streamon,
1140         .vidioc_streamoff            = vidioc_streamoff,
1141         .vidioc_g_parm               = vidioc_g_parm,
1142 };
1143
1144 /*********************************************************************************/
1145 /* buffer handling functions                                                  */
1146
1147 static int buffer_activate (struct saa7146_dev *dev,
1148                      struct saa7146_buf *buf,
1149                      struct saa7146_buf *next)
1150 {
1151         struct saa7146_vv *vv = dev->vv_data;
1152
1153         buf->vb.state = VIDEOBUF_ACTIVE;
1154         saa7146_set_capture(dev,buf,next);
1155
1156         mod_timer(&vv->video_q.timeout, jiffies+BUFFER_TIMEOUT);
1157         return 0;
1158 }
1159
1160 static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf)
1161 {
1162         saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1163         saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1164         saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1165 }
1166
1167 static int buffer_prepare(struct videobuf_queue *q,
1168                           struct videobuf_buffer *vb, enum v4l2_field field)
1169 {
1170         struct file *file = q->priv_data;
1171         struct saa7146_fh *fh = file->private_data;
1172         struct saa7146_dev *dev = fh->dev;
1173         struct saa7146_vv *vv = dev->vv_data;
1174         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1175         int size,err = 0;
1176
1177         DEB_CAP(("vbuf:%p\n",vb));
1178
1179         /* sanity checks */
1180         if (fh->video_fmt.width  < 48 ||
1181             fh->video_fmt.height < 32 ||
1182             fh->video_fmt.width  > vv->standard->h_max_out ||
1183             fh->video_fmt.height > vv->standard->v_max_out) {
1184                 DEB_D(("w (%d) / h (%d) out of bounds.\n",fh->video_fmt.width,fh->video_fmt.height));
1185                 return -EINVAL;
1186         }
1187
1188         size = fh->video_fmt.sizeimage;
1189         if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1190                 DEB_D(("size mismatch.\n"));
1191                 return -EINVAL;
1192         }
1193
1194         DEB_CAP(("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1195                 fh->video_fmt.width,fh->video_fmt.height,size,v4l2_field_names[fh->video_fmt.field]));
1196         if (buf->vb.width  != fh->video_fmt.width  ||
1197             buf->vb.bytesperline != fh->video_fmt.bytesperline ||
1198             buf->vb.height != fh->video_fmt.height ||
1199             buf->vb.size   != size ||
1200             buf->vb.field  != field      ||
1201             buf->vb.field  != fh->video_fmt.field  ||
1202             buf->fmt       != &fh->video_fmt) {
1203                 saa7146_dma_free(dev,q,buf);
1204         }
1205
1206         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1207                 struct saa7146_format *sfmt;
1208
1209                 buf->vb.bytesperline  = fh->video_fmt.bytesperline;
1210                 buf->vb.width  = fh->video_fmt.width;
1211                 buf->vb.height = fh->video_fmt.height;
1212                 buf->vb.size   = size;
1213                 buf->vb.field  = field;
1214                 buf->fmt       = &fh->video_fmt;
1215                 buf->vb.field  = fh->video_fmt.field;
1216
1217                 sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
1218
1219                 release_all_pagetables(dev, buf);
1220                 if( 0 != IS_PLANAR(sfmt->trans)) {
1221                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1222                         saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1223                         saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1224                 } else {
1225                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1226                 }
1227
1228                 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1229                 if (err)
1230                         goto oops;
1231                 err = saa7146_pgtable_build(dev,buf);
1232                 if (err)
1233                         goto oops;
1234         }
1235         buf->vb.state = VIDEOBUF_PREPARED;
1236         buf->activate = buffer_activate;
1237
1238         return 0;
1239
1240  oops:
1241         DEB_D(("error out.\n"));
1242         saa7146_dma_free(dev,q,buf);
1243
1244         return err;
1245 }
1246
1247 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1248 {
1249         struct file *file = q->priv_data;
1250         struct saa7146_fh *fh = file->private_data;
1251
1252         if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1253                 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1254
1255         *size = fh->video_fmt.sizeimage;
1256
1257         /* check if we exceed the "max_memory" parameter */
1258         if( (*count * *size) > (max_memory*1048576) ) {
1259                 *count = (max_memory*1048576) / *size;
1260         }
1261
1262         DEB_CAP(("%d buffers, %d bytes each.\n",*count,*size));
1263
1264         return 0;
1265 }
1266
1267 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1268 {
1269         struct file *file = q->priv_data;
1270         struct saa7146_fh *fh = file->private_data;
1271         struct saa7146_dev *dev = fh->dev;
1272         struct saa7146_vv *vv = dev->vv_data;
1273         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1274
1275         DEB_CAP(("vbuf:%p\n",vb));
1276         saa7146_buffer_queue(fh->dev,&vv->video_q,buf);
1277 }
1278
1279 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1280 {
1281         struct file *file = q->priv_data;
1282         struct saa7146_fh *fh = file->private_data;
1283         struct saa7146_dev *dev = fh->dev;
1284         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1285
1286         DEB_CAP(("vbuf:%p\n",vb));
1287
1288         saa7146_dma_free(dev,q,buf);
1289
1290         release_all_pagetables(dev, buf);
1291 }
1292
1293 static struct videobuf_queue_ops video_qops = {
1294         .buf_setup    = buffer_setup,
1295         .buf_prepare  = buffer_prepare,
1296         .buf_queue    = buffer_queue,
1297         .buf_release  = buffer_release,
1298 };
1299
1300 /********************************************************************************/
1301 /* file operations */
1302
1303 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1304 {
1305         INIT_LIST_HEAD(&vv->video_q.queue);
1306
1307         init_timer(&vv->video_q.timeout);
1308         vv->video_q.timeout.function = saa7146_buffer_timeout;
1309         vv->video_q.timeout.data     = (unsigned long)(&vv->video_q);
1310         vv->video_q.dev              = dev;
1311
1312         /* set some default values */
1313         vv->standard = &dev->ext_vv_data->stds[0];
1314
1315         /* FIXME: what's this? */
1316         vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1317         vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1318 }
1319
1320
1321 static int video_open(struct saa7146_dev *dev, struct file *file)
1322 {
1323         struct saa7146_fh *fh = file->private_data;
1324         struct saa7146_format *sfmt;
1325
1326         fh->video_fmt.width = 384;
1327         fh->video_fmt.height = 288;
1328         fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24;
1329         fh->video_fmt.bytesperline = 0;
1330         fh->video_fmt.field = V4L2_FIELD_ANY;
1331         sfmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat);
1332         fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8;
1333
1334         videobuf_queue_sg_init(&fh->video_q, &video_qops,
1335                             &dev->pci->dev, &dev->slock,
1336                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
1337                             V4L2_FIELD_INTERLACED,
1338                             sizeof(struct saa7146_buf),
1339                             file, &dev->v4l2_lock);
1340
1341         return 0;
1342 }
1343
1344
1345 static void video_close(struct saa7146_dev *dev, struct file *file)
1346 {
1347         struct saa7146_fh *fh = file->private_data;
1348         struct saa7146_vv *vv = dev->vv_data;
1349         struct videobuf_queue *q = &fh->video_q;
1350         int err;
1351
1352         if (IS_CAPTURE_ACTIVE(fh) != 0) {
1353                 err = video_end(fh, file);
1354         } else if (IS_OVERLAY_ACTIVE(fh) != 0) {
1355                 err = saa7146_stop_preview(fh);
1356         }
1357
1358         videobuf_stop(q);
1359
1360         /* hmm, why is this function declared void? */
1361         /* return err */
1362 }
1363
1364
1365 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1366 {
1367         struct saa7146_vv *vv = dev->vv_data;
1368         struct saa7146_dmaqueue *q = &vv->video_q;
1369
1370         spin_lock(&dev->slock);
1371         DEB_CAP(("called.\n"));
1372
1373         /* only finish the buffer if we have one... */
1374         if( NULL != q->curr ) {
1375                 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1376         }
1377         saa7146_buffer_next(dev,q,0);
1378
1379         spin_unlock(&dev->slock);
1380 }
1381
1382 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1383 {
1384         struct saa7146_fh *fh = file->private_data;
1385         struct saa7146_dev *dev = fh->dev;
1386         struct saa7146_vv *vv = dev->vv_data;
1387         ssize_t ret = 0;
1388
1389         DEB_EE(("called.\n"));
1390
1391         if ((vv->video_status & STATUS_CAPTURE) != 0) {
1392                 /* fixme: should we allow read() captures while streaming capture? */
1393                 if (vv->video_fh == fh) {
1394                         DEB_S(("already capturing.\n"));
1395                         return -EBUSY;
1396                 }
1397                 DEB_S(("already capturing in another open.\n"));
1398                 return -EBUSY;
1399         }
1400
1401         ret = video_begin(fh);
1402         if( 0 != ret) {
1403                 goto out;
1404         }
1405
1406         ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1407                                 file->f_flags & O_NONBLOCK);
1408         if (ret != 0) {
1409                 video_end(fh, file);
1410         } else {
1411                 ret = video_end(fh, file);
1412         }
1413 out:
1414         /* restart overlay if it was active before */
1415         if (vv->ov_suspend != NULL) {
1416                 saa7146_start_preview(vv->ov_suspend);
1417                 vv->ov_suspend = NULL;
1418         }
1419
1420         return ret;
1421 }
1422
1423 struct saa7146_use_ops saa7146_video_uops = {
1424         .init = video_init,
1425         .open = video_open,
1426         .release = video_close,
1427         .irq_done = video_irq_done,
1428         .read = video_read,
1429 };