Pileus Git - ~andy/linux/blob - drivers/media/common/saa7146_video.c

   1 #include <media/saa7146_vv.h>
   2 #include <media/v4l2-chip-ident.h>
   3 #include <linux/module.h>
   4
   5 static int max_memory = 32;
   6
   7 module_param(max_memory, int, 0644);
   8 MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)");
   9
  10 #define IS_CAPTURE_ACTIVE(fh) \
  11         (((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh))
  12
  13 #define IS_OVERLAY_ACTIVE(fh) \
  14         (((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh))
  15
  16 /* format descriptions for capture and preview */
  17 static struct saa7146_format formats[] = {
  18         {
  19                 .name           = "RGB-8 (3-3-2)",
  20                 .pixelformat    = V4L2_PIX_FMT_RGB332,
  21                 .trans          = RGB08_COMPOSED,
  22                 .depth          = 8,
  23                 .flags          = 0,
  24         }, {
  25                 .name           = "RGB-16 (5/B-6/G-5/R)",
  26                 .pixelformat    = V4L2_PIX_FMT_RGB565,
  27                 .trans          = RGB16_COMPOSED,
  28                 .depth          = 16,
  29                 .flags          = 0,
  30         }, {
  31                 .name           = "RGB-24 (B-G-R)",
  32                 .pixelformat    = V4L2_PIX_FMT_BGR24,
  33                 .trans          = RGB24_COMPOSED,
  34                 .depth          = 24,
  35                 .flags          = 0,
  36         }, {
  37                 .name           = "RGB-32 (B-G-R)",
  38                 .pixelformat    = V4L2_PIX_FMT_BGR32,
  39                 .trans          = RGB32_COMPOSED,
  40                 .depth          = 32,
  41                 .flags          = 0,
  42         }, {
  43                 .name           = "RGB-32 (R-G-B)",
  44                 .pixelformat    = V4L2_PIX_FMT_RGB32,
  45                 .trans          = RGB32_COMPOSED,
  46                 .depth          = 32,
  47                 .flags          = 0,
  48                 .swap           = 0x2,
  49         }, {
  50                 .name           = "Greyscale-8",
  51                 .pixelformat    = V4L2_PIX_FMT_GREY,
  52                 .trans          = Y8,
  53                 .depth          = 8,
  54                 .flags          = 0,
  55         }, {
  56                 .name           = "YUV 4:2:2 planar (Y-Cb-Cr)",
  57                 .pixelformat    = V4L2_PIX_FMT_YUV422P,
  58                 .trans          = YUV422_DECOMPOSED,
  59                 .depth          = 16,
  60                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
  61         }, {
  62                 .name           = "YVU 4:2:0 planar (Y-Cb-Cr)",
  63                 .pixelformat    = V4L2_PIX_FMT_YVU420,
  64                 .trans          = YUV420_DECOMPOSED,
  65                 .depth          = 12,
  66                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
  67         }, {
  68                 .name           = "YUV 4:2:0 planar (Y-Cb-Cr)",
  69                 .pixelformat    = V4L2_PIX_FMT_YUV420,
  70                 .trans          = YUV420_DECOMPOSED,
  71                 .depth          = 12,
  72                 .flags          = FORMAT_IS_PLANAR,
  73         }, {
  74                 .name           = "YUV 4:2:2 (U-Y-V-Y)",
  75                 .pixelformat    = V4L2_PIX_FMT_UYVY,
  76                 .trans          = YUV422_COMPOSED,
  77                 .depth          = 16,
  78                 .flags          = 0,
  79         }
  80 };
  81
  82 /* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps.
  83    due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped
  84    (like V4L2_PIX_FMT_YUYV) ... 8-( */
  85
  86 static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
  87
  88 struct saa7146_format* saa7146_format_by_fourcc(struct saa7146_dev *dev, int fourcc)
  89 {
  90         int i, j = NUM_FORMATS;
  91
  92         for (i = 0; i < j; i++) {
  93                 if (formats[i].pixelformat == fourcc) {
  94                         return formats+i;
  95                 }
  96         }
  97
  98         DEB_D(("unknown pixelformat:'%4.4s'\n",(char *)&fourcc));
  99         return NULL;
 100 }
 101
 102 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f);
 103
 104 int saa7146_start_preview(struct saa7146_fh *fh)
 105 {
 106         struct saa7146_dev *dev = fh->dev;
 107         struct saa7146_vv *vv = dev->vv_data;
 108         struct v4l2_format fmt;
 109         int ret = 0, err = 0;
 110
 111         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
 112
 113         /* check if we have overlay informations */
 114         if( NULL == fh->ov.fh ) {
 115                 DEB_D(("no overlay data available. try S_FMT first.\n"));
 116                 return -EAGAIN;
 117         }
 118
 119         /* check if streaming capture is running */
 120         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 121                 DEB_D(("streaming capture is active.\n"));
 122                 return -EBUSY;
 123         }
 124
 125         /* check if overlay is running */
 126         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 127                 if (vv->video_fh == fh) {
 128                         DEB_D(("overlay is already active.\n"));
 129                         return 0;
 130                 }
 131                 DEB_D(("overlay is already active in another open.\n"));
 132                 return -EBUSY;
 133         }
 134
 135         if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
 136                 DEB_D(("cannot get necessary overlay resources\n"));
 137                 return -EBUSY;
 138         }
 139
 140         fmt.fmt.win = fh->ov.win;
 141         err = vidioc_try_fmt_vid_overlay(NULL, fh, &fmt);
 142         if (0 != err) {
 143                 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 144                 return -EBUSY;
 145         }
 146         fh->ov.win = fmt.fmt.win;
 147         vv->ov_data = &fh->ov;
 148
 149         DEB_D(("%dx%d+%d+%d %s field=%s\n",
 150                 fh->ov.win.w.width,fh->ov.win.w.height,
 151                 fh->ov.win.w.left,fh->ov.win.w.top,
 152                 vv->ov_fmt->name,v4l2_field_names[fh->ov.win.field]));
 153
 154         if (0 != (ret = saa7146_enable_overlay(fh))) {
 155                 DEB_D(("enabling overlay failed: %d\n",ret));
 156                 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 157                 return ret;
 158         }
 159
 160         vv->video_status = STATUS_OVERLAY;
 161         vv->video_fh = fh;
 162
 163         return 0;
 164 }
 165 EXPORT_SYMBOL_GPL(saa7146_start_preview);
 166
 167 int saa7146_stop_preview(struct saa7146_fh *fh)
 168 {
 169         struct saa7146_dev *dev = fh->dev;
 170         struct saa7146_vv *vv = dev->vv_data;
 171
 172         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
 173
 174         /* check if streaming capture is running */
 175         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 176                 DEB_D(("streaming capture is active.\n"));
 177                 return -EBUSY;
 178         }
 179
 180         /* check if overlay is running at all */
 181         if ((vv->video_status & STATUS_OVERLAY) == 0) {
 182                 DEB_D(("no active overlay.\n"));
 183                 return 0;
 184         }
 185
 186         if (vv->video_fh != fh) {
 187                 DEB_D(("overlay is active, but in another open.\n"));
 188                 return -EBUSY;
 189         }
 190
 191         vv->video_status = 0;
 192         vv->video_fh = NULL;
 193
 194         saa7146_disable_overlay(fh);
 195
 196         saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 197
 198         return 0;
 199 }
 200 EXPORT_SYMBOL_GPL(saa7146_stop_preview);
 201
 202 /********************************************************************************/
 203 /* device controls */
 204
 205 static struct v4l2_queryctrl controls[] = {
 206         {
 207                 .id             = V4L2_CID_BRIGHTNESS,
 208                 .name           = "Brightness",
 209                 .minimum        = 0,
 210                 .maximum        = 255,
 211                 .step           = 1,
 212                 .default_value  = 128,
 213                 .type           = V4L2_CTRL_TYPE_INTEGER,
 214                 .flags          = V4L2_CTRL_FLAG_SLIDER,
 215         },{
 216                 .id             = V4L2_CID_CONTRAST,
 217                 .name           = "Contrast",
 218                 .minimum        = 0,
 219                 .maximum        = 127,
 220                 .step           = 1,
 221                 .default_value  = 64,
 222                 .type           = V4L2_CTRL_TYPE_INTEGER,
 223                 .flags          = V4L2_CTRL_FLAG_SLIDER,
 224         },{
 225                 .id             = V4L2_CID_SATURATION,
 226                 .name           = "Saturation",
 227                 .minimum        = 0,
 228                 .maximum        = 127,
 229                 .step           = 1,
 230                 .default_value  = 64,
 231                 .type           = V4L2_CTRL_TYPE_INTEGER,
 232                 .flags          = V4L2_CTRL_FLAG_SLIDER,
 233         },{
 234                 .id             = V4L2_CID_VFLIP,
 235                 .name           = "Vertical Flip",
 236                 .minimum        = 0,
 237                 .maximum        = 1,
 238                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
 239         },{
 240                 .id             = V4L2_CID_HFLIP,
 241                 .name           = "Horizontal Flip",
 242                 .minimum        = 0,
 243                 .maximum        = 1,
 244                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
 245         },
 246 };
 247 static int NUM_CONTROLS = sizeof(controls)/sizeof(struct v4l2_queryctrl);
 248
 249 #define V4L2_CID_PRIVATE_LASTP1      (V4L2_CID_PRIVATE_BASE + 0)
 250
 251 static struct v4l2_queryctrl* ctrl_by_id(int id)
 252 {
 253         int i;
 254
 255         for (i = 0; i < NUM_CONTROLS; i++)
 256                 if (controls[i].id == id)
 257                         return controls+i;
 258         return NULL;
 259 }
 260
 261 /********************************************************************************/
 262 /* common pagetable functions */
 263
 264 static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
 265 {
 266         struct pci_dev *pci = dev->pci;
 267         struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
 268         struct scatterlist *list = dma->sglist;
 269         int length = dma->sglen;
 270         struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
 271
 272         DEB_EE(("dev:%p, buf:%p, sg_len:%d\n",dev,buf,length));
 273
 274         if( 0 != IS_PLANAR(sfmt->trans)) {
 275                 struct saa7146_pgtable *pt1 = &buf->pt[0];
 276                 struct saa7146_pgtable *pt2 = &buf->pt[1];
 277                 struct saa7146_pgtable *pt3 = &buf->pt[2];
 278                 __le32  *ptr1, *ptr2, *ptr3;
 279                 __le32 fill;
 280
 281                 int size = buf->fmt->width*buf->fmt->height;
 282                 int i,p,m1,m2,m3,o1,o2;
 283
 284                 switch( sfmt->depth ) {
 285                         case 12: {
 286                                 /* create some offsets inside the page table */
 287                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
 288                                 m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
 289                                 m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
 290                                 o1 = size%PAGE_SIZE;
 291                                 o2 = (size+(size/4))%PAGE_SIZE;
 292                                 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
 293                                 break;
 294                         }
 295                         case 16: {
 296                                 /* create some offsets inside the page table */
 297                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
 298                                 m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
 299                                 m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
 300                                 o1 = size%PAGE_SIZE;
 301                                 o2 = (size+(size/2))%PAGE_SIZE;
 302                                 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
 303                                 break;
 304                         }
 305                         default: {
 306                                 return -1;
 307                         }
 308                 }
 309
 310                 ptr1 = pt1->cpu;
 311                 ptr2 = pt2->cpu;
 312                 ptr3 = pt3->cpu;
 313
 314                 /* walk all pages, copy all page addresses to ptr1 */
 315                 for (i = 0; i < length; i++, list++) {
 316                         for (p = 0; p * 4096 < list->length; p++, ptr1++) {
 317                                 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
 318                         }
 319                 }
 320 /*
 321                 ptr1 = pt1->cpu;
 322                 for(j=0;j<40;j++) {
 323                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
 324                 }
 325 */
 326
 327                 /* if we have a user buffer, the first page may not be
 328                    aligned to a page boundary. */
 329                 pt1->offset = dma->sglist->offset;
 330                 pt2->offset = pt1->offset+o1;
 331                 pt3->offset = pt1->offset+o2;
 332
 333                 /* create video-dma2 page table */
 334                 ptr1 = pt1->cpu;
 335                 for(i = m1; i <= m2 ; i++, ptr2++) {
 336                         *ptr2 = ptr1[i];
 337                 }
 338                 fill = *(ptr2-1);
 339                 for(;i<1024;i++,ptr2++) {
 340                         *ptr2 = fill;
 341                 }
 342                 /* create video-dma3 page table */
 343                 ptr1 = pt1->cpu;
 344                 for(i = m2; i <= m3; i++,ptr3++) {
 345                         *ptr3 = ptr1[i];
 346                 }
 347                 fill = *(ptr3-1);
 348                 for(;i<1024;i++,ptr3++) {
 349                         *ptr3 = fill;
 350                 }
 351                 /* finally: finish up video-dma1 page table */
 352                 ptr1 = pt1->cpu+m1;
 353                 fill = pt1->cpu[m1];
 354                 for(i=m1;i<1024;i++,ptr1++) {
 355                         *ptr1 = fill;
 356                 }
 357 /*
 358                 ptr1 = pt1->cpu;
 359                 ptr2 = pt2->cpu;
 360                 ptr3 = pt3->cpu;
 361                 for(j=0;j<40;j++) {
 362                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
 363                 }
 364                 for(j=0;j<40;j++) {
 365                         printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
 366                 }
 367                 for(j=0;j<40;j++) {
 368                         printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
 369                 }
 370 */
 371         } else {
 372                 struct saa7146_pgtable *pt = &buf->pt[0];
 373                 return saa7146_pgtable_build_single(pci, pt, list, length);
 374         }
 375
 376         return 0;
 377 }
 378
 379
 380 /********************************************************************************/
 381 /* file operations */
 382
 383 static int video_begin(struct saa7146_fh *fh)
 384 {
 385         struct saa7146_dev *dev = fh->dev;
 386         struct saa7146_vv *vv = dev->vv_data;
 387         struct saa7146_format *fmt = NULL;
 388         unsigned int resource;
 389         int ret = 0, err = 0;
 390
 391         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
 392
 393         if ((vv->video_status & STATUS_CAPTURE) != 0) {
 394                 if (vv->video_fh == fh) {
 395                         DEB_S(("already capturing.\n"));
 396                         return 0;
 397                 }
 398                 DEB_S(("already capturing in another open.\n"));
 399                 return -EBUSY;
 400         }
 401
 402         if ((vv->video_status & STATUS_OVERLAY) != 0) {
 403                 DEB_S(("warning: suspending overlay video for streaming capture.\n"));
 404                 vv->ov_suspend = vv->video_fh;
 405                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
 406                 if (0 != err) {
 407                         DEB_D(("suspending video failed. aborting\n"));
 408                         return err;
 409                 }
 410         }
 411
 412         fmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat);
 413         /* we need to have a valid format set here */
 414         BUG_ON(NULL == fmt);
 415
 416         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 417                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
 418         } else {
 419                 resource = RESOURCE_DMA1_HPS;
 420         }
 421
 422         ret = saa7146_res_get(fh, resource);
 423         if (0 == ret) {
 424                 DEB_S(("cannot get capture resource %d\n",resource));
 425                 if (vv->ov_suspend != NULL) {
 426                         saa7146_start_preview(vv->ov_suspend);
 427                         vv->ov_suspend = NULL;
 428                 }
 429                 return -EBUSY;
 430         }
 431
 432         /* clear out beginning of streaming bit (rps register 0)*/
 433         saa7146_write(dev, MC2, MASK_27 );
 434
 435         /* enable rps0 irqs */
 436         SAA7146_IER_ENABLE(dev, MASK_27);
 437
 438         vv->video_fh = fh;
 439         vv->video_status = STATUS_CAPTURE;
 440
 441         return 0;
 442 }
 443
 444 static int video_end(struct saa7146_fh *fh, struct file *file)
 445 {
 446         struct saa7146_dev *dev = fh->dev;
 447         struct saa7146_vv *vv = dev->vv_data;
 448         struct saa7146_format *fmt = NULL;
 449         unsigned long flags;
 450         unsigned int resource;
 451         u32 dmas = 0;
 452         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
 453
 454         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
 455                 DEB_S(("not capturing.\n"));
 456                 return 0;
 457         }
 458
 459         if (vv->video_fh != fh) {
 460                 DEB_S(("capturing, but in another open.\n"));
 461                 return -EBUSY;
 462         }
 463
 464         fmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat);
 465         /* we need to have a valid format set here */
 466         BUG_ON(NULL == fmt);
 467
 468         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 469                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
 470                 dmas = MASK_22 | MASK_21 | MASK_20;
 471         } else {
 472                 resource = RESOURCE_DMA1_HPS;
 473                 dmas = MASK_22;
 474         }
 475         spin_lock_irqsave(&dev->slock,flags);
 476
 477         /* disable rps0  */
 478         saa7146_write(dev, MC1, MASK_28);
 479
 480         /* disable rps0 irqs */
 481         SAA7146_IER_DISABLE(dev, MASK_27);
 482
 483         /* shut down all used video dma transfers */
 484         saa7146_write(dev, MC1, dmas);
 485
 486         spin_unlock_irqrestore(&dev->slock, flags);
 487
 488         vv->video_fh = NULL;
 489         vv->video_status = 0;
 490
 491         saa7146_res_free(fh, resource);
 492
 493         if (vv->ov_suspend != NULL) {
 494                 saa7146_start_preview(vv->ov_suspend);
 495                 vv->ov_suspend = NULL;
 496         }
 497
 498         return 0;
 499 }
 500
 501 static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 502 {
 503         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 504
 505         strcpy((char *)cap->driver, "saa7146 v4l2");
 506         strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
 507         sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci));
 508         cap->version = SAA7146_VERSION_CODE;
 509         cap->capabilities =
 510                 V4L2_CAP_VIDEO_CAPTURE |
 511                 V4L2_CAP_VIDEO_OVERLAY |
 512                 V4L2_CAP_READWRITE |
 513                 V4L2_CAP_STREAMING;
 514         cap->capabilities |= dev->ext_vv_data->capabilities;
 515         return 0;
 516 }
 517
 518 static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
 519 {
 520         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 521         struct saa7146_vv *vv = dev->vv_data;
 522
 523         *fb = vv->ov_fb;
 524         fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
 525         return 0;
 526 }
 527
 528 static int vidioc_s_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
 529 {
 530         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 531         struct saa7146_vv *vv = dev->vv_data;
 532         struct saa7146_format *fmt;
 533
 534         DEB_EE(("VIDIOC_S_FBUF\n"));
 535
 536         if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
 537                 return -EPERM;
 538
 539         /* check args */
 540         fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat);
 541         if (NULL == fmt)
 542                 return -EINVAL;
 543
 544         /* planar formats are not allowed for overlay video, clipping and video dma would clash */
 545         if (fmt->flags & FORMAT_IS_PLANAR)
 546                 DEB_S(("planar pixelformat '%4.4s' not allowed for overlay\n",
 547                                         (char *)&fmt->pixelformat));
 548
 549         /* check if overlay is running */
 550         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 551                 if (vv->video_fh != fh) {
 552                         DEB_D(("refusing to change framebuffer informations while overlay is active in another open.\n"));
 553                         return -EBUSY;
 554                 }
 555         }
 556
 557         /* ok, accept it */
 558         vv->ov_fb = *fb;
 559         vv->ov_fmt = fmt;
 560
 561         if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) {
 562                 vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8;
 563                 DEB_D(("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline));
 564         }
 565         return 0;
 566 }
 567
 568 static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
 569 {
 570         if (f->index >= NUM_FORMATS)
 571                 return -EINVAL;
 572         strlcpy((char *)f->description, formats[f->index].name,
 573                         sizeof(f->description));
 574         f->pixelformat = formats[f->index].pixelformat;
 575         return 0;
 576 }
 577
 578 static int vidioc_queryctrl(struct file *file, void *fh, struct v4l2_queryctrl *c)
 579 {
 580         const struct v4l2_queryctrl *ctrl;
 581
 582         if ((c->id <  V4L2_CID_BASE ||
 583              c->id >= V4L2_CID_LASTP1) &&
 584             (c->id <  V4L2_CID_PRIVATE_BASE ||
 585              c->id >= V4L2_CID_PRIVATE_LASTP1))
 586                 return -EINVAL;
 587
 588         ctrl = ctrl_by_id(c->id);
 589         if (ctrl == NULL)
 590                 return -EINVAL;
 591
 592         DEB_EE(("VIDIOC_QUERYCTRL: id:%d\n", c->id));
 593         *c = *ctrl;
 594         return 0;
 595 }
 596
 597 static int vidioc_g_ctrl(struct file *file, void *fh, struct v4l2_control *c)
 598 {
 599         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 600         struct saa7146_vv *vv = dev->vv_data;
 601         const struct v4l2_queryctrl *ctrl;
 602         u32 value = 0;
 603
 604         ctrl = ctrl_by_id(c->id);
 605         if (NULL == ctrl)
 606                 return -EINVAL;
 607         switch (c->id) {
 608         case V4L2_CID_BRIGHTNESS:
 609                 value = saa7146_read(dev, BCS_CTRL);
 610                 c->value = 0xff & (value >> 24);
 611                 DEB_D(("V4L2_CID_BRIGHTNESS: %d\n", c->value));
 612                 break;
 613         case V4L2_CID_CONTRAST:
 614                 value = saa7146_read(dev, BCS_CTRL);
 615                 c->value = 0x7f & (value >> 16);
 616                 DEB_D(("V4L2_CID_CONTRAST: %d\n", c->value));
 617                 break;
 618         case V4L2_CID_SATURATION:
 619                 value = saa7146_read(dev, BCS_CTRL);
 620                 c->value = 0x7f & (value >> 0);
 621                 DEB_D(("V4L2_CID_SATURATION: %d\n", c->value));
 622                 break;
 623         case V4L2_CID_VFLIP:
 624                 c->value = vv->vflip;
 625                 DEB_D(("V4L2_CID_VFLIP: %d\n", c->value));
 626                 break;
 627         case V4L2_CID_HFLIP:
 628                 c->value = vv->hflip;
 629                 DEB_D(("V4L2_CID_HFLIP: %d\n", c->value));
 630                 break;
 631         default:
 632                 return -EINVAL;
 633         }
 634         return 0;
 635 }
 636
 637 static int vidioc_s_ctrl(struct file *file, void *fh, struct v4l2_control *c)
 638 {
 639         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 640         struct saa7146_vv *vv = dev->vv_data;
 641         const struct v4l2_queryctrl *ctrl;
 642
 643         ctrl = ctrl_by_id(c->id);
 644         if (NULL == ctrl) {
 645                 DEB_D(("unknown control %d\n", c->id));
 646                 return -EINVAL;
 647         }
 648
 649         switch (ctrl->type) {
 650         case V4L2_CTRL_TYPE_BOOLEAN:
 651         case V4L2_CTRL_TYPE_MENU:
 652         case V4L2_CTRL_TYPE_INTEGER:
 653                 if (c->value < ctrl->minimum)
 654                         c->value = ctrl->minimum;
 655                 if (c->value > ctrl->maximum)
 656                         c->value = ctrl->maximum;
 657                 break;
 658         default:
 659                 /* nothing */;
 660         }
 661
 662         switch (c->id) {
 663         case V4L2_CID_BRIGHTNESS: {
 664                 u32 value = saa7146_read(dev, BCS_CTRL);
 665                 value &= 0x00ffffff;
 666                 value |= (c->value << 24);
 667                 saa7146_write(dev, BCS_CTRL, value);
 668                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 669                 break;
 670         }
 671         case V4L2_CID_CONTRAST: {
 672                 u32 value = saa7146_read(dev, BCS_CTRL);
 673                 value &= 0xff00ffff;
 674                 value |= (c->value << 16);
 675                 saa7146_write(dev, BCS_CTRL, value);
 676                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 677                 break;
 678         }
 679         case V4L2_CID_SATURATION: {
 680                 u32 value = saa7146_read(dev, BCS_CTRL);
 681                 value &= 0xffffff00;
 682                 value |= (c->value << 0);
 683                 saa7146_write(dev, BCS_CTRL, value);
 684                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 685                 break;
 686         }
 687         case V4L2_CID_HFLIP:
 688                 /* fixme: we can support changing VFLIP and HFLIP here... */
 689                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
 690                         DEB_D(("V4L2_CID_HFLIP while active capture.\n"));
 691                         return -EBUSY;
 692                 }
 693                 vv->hflip = c->value;
 694                 break;
 695         case V4L2_CID_VFLIP:
 696                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
 697                         DEB_D(("V4L2_CID_VFLIP while active capture.\n"));
 698                         return -EBUSY;
 699                 }
 700                 vv->vflip = c->value;
 701                 break;
 702         default:
 703                 return -EINVAL;
 704         }
 705
 706         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 707                 saa7146_stop_preview(fh);
 708                 saa7146_start_preview(fh);
 709         }
 710         return 0;
 711 }
 712
 713 static int vidioc_g_parm(struct file *file, void *fh,
 714                 struct v4l2_streamparm *parm)
 715 {
 716         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 717         struct saa7146_vv *vv = dev->vv_data;
 718
 719         parm->parm.capture.readbuffers = 1;
 720         v4l2_video_std_frame_period(vv->standard->id,
 721                                     &parm->parm.capture.timeperframe);
 722         return 0;
 723 }
 724
 725 static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
 726 {
 727         f->fmt.pix = ((struct saa7146_fh *)fh)->video_fmt;
 728         return 0;
 729 }
 730
 731 static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
 732 {
 733         f->fmt.win = ((struct saa7146_fh *)fh)->ov.win;
 734         return 0;
 735 }
 736
 737 static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f)
 738 {
 739         f->fmt.vbi = ((struct saa7146_fh *)fh)->vbi_fmt;
 740         return 0;
 741 }
 742
 743 static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
 744 {
 745         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 746         struct saa7146_vv *vv = dev->vv_data;
 747         struct saa7146_format *fmt;
 748         enum v4l2_field field;
 749         int maxw, maxh;
 750         int calc_bpl;
 751
 752         DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh));
 753
 754         fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat);
 755         if (NULL == fmt)
 756                 return -EINVAL;
 757
 758         field = f->fmt.pix.field;
 759         maxw  = vv->standard->h_max_out;
 760         maxh  = vv->standard->v_max_out;
 761
 762         if (V4L2_FIELD_ANY == field) {
 763                 field = (f->fmt.pix.height > maxh / 2)
 764                         ? V4L2_FIELD_INTERLACED
 765                         : V4L2_FIELD_BOTTOM;
 766         }
 767         switch (field) {
 768         case V4L2_FIELD_ALTERNATE:
 769                 vv->last_field = V4L2_FIELD_TOP;
 770                 maxh = maxh / 2;
 771                 break;
 772         case V4L2_FIELD_TOP:
 773         case V4L2_FIELD_BOTTOM:
 774                 vv->last_field = V4L2_FIELD_INTERLACED;
 775                 maxh = maxh / 2;
 776                 break;
 777         case V4L2_FIELD_INTERLACED:
 778                 vv->last_field = V4L2_FIELD_INTERLACED;
 779                 break;
 780         default:
 781                 DEB_D(("no known field mode '%d'.\n", field));
 782                 return -EINVAL;
 783         }
 784
 785         f->fmt.pix.field = field;
 786         if (f->fmt.pix.width > maxw)
 787                 f->fmt.pix.width = maxw;
 788         if (f->fmt.pix.height > maxh)
 789                 f->fmt.pix.height = maxh;
 790
 791         calc_bpl = (f->fmt.pix.width * fmt->depth) / 8;
 792
 793         if (f->fmt.pix.bytesperline < calc_bpl)
 794                 f->fmt.pix.bytesperline = calc_bpl;
 795
 796         if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */
 797                 f->fmt.pix.bytesperline = calc_bpl;
 798
 799         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
 800         DEB_D(("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n", f->fmt.pix.width,
 801                         f->fmt.pix.height, f->fmt.pix.bytesperline, f->fmt.pix.sizeimage));
 802
 803         return 0;
 804 }
 805
 806
 807 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
 808 {
 809         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 810         struct saa7146_vv *vv = dev->vv_data;
 811         struct v4l2_window *win = &f->fmt.win;
 812         enum v4l2_field field;
 813         int maxw, maxh;
 814
 815         DEB_EE(("dev:%p\n", dev));
 816
 817         if (NULL == vv->ov_fb.base) {
 818                 DEB_D(("no fb base set.\n"));
 819                 return -EINVAL;
 820         }
 821         if (NULL == vv->ov_fmt) {
 822                 DEB_D(("no fb fmt set.\n"));
 823                 return -EINVAL;
 824         }
 825         if (win->w.width < 48 || win->w.height < 32) {
 826                 DEB_D(("min width/height. (%d,%d)\n", win->w.width, win->w.height));
 827                 return -EINVAL;
 828         }
 829         if (win->clipcount > 16) {
 830                 DEB_D(("clipcount too big.\n"));
 831                 return -EINVAL;
 832         }
 833
 834         field = win->field;
 835         maxw  = vv->standard->h_max_out;
 836         maxh  = vv->standard->v_max_out;
 837
 838         if (V4L2_FIELD_ANY == field) {
 839                 field = (win->w.height > maxh / 2)
 840                         ? V4L2_FIELD_INTERLACED
 841                         : V4L2_FIELD_TOP;
 842                 }
 843         switch (field) {
 844         case V4L2_FIELD_TOP:
 845         case V4L2_FIELD_BOTTOM:
 846         case V4L2_FIELD_ALTERNATE:
 847                 maxh = maxh / 2;
 848                 break;
 849         case V4L2_FIELD_INTERLACED:
 850                 break;
 851         default:
 852                 DEB_D(("no known field mode '%d'.\n", field));
 853                 return -EINVAL;
 854         }
 855
 856         win->field = field;
 857         if (win->w.width > maxw)
 858                 win->w.width = maxw;
 859         if (win->w.height > maxh)
 860                 win->w.height = maxh;
 861
 862         return 0;
 863 }
 864
 865 static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f)
 866 {
 867         struct saa7146_fh *fh = __fh;
 868         struct saa7146_dev *dev = fh->dev;
 869         struct saa7146_vv *vv = dev->vv_data;
 870         int err;
 871
 872         DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh));
 873         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 874                 DEB_EE(("streaming capture is active\n"));
 875                 return -EBUSY;
 876         }
 877         err = vidioc_try_fmt_vid_cap(file, fh, f);
 878         if (0 != err)
 879                 return err;
 880         fh->video_fmt = f->fmt.pix;
 881         DEB_EE(("set to pixelformat '%4.4s'\n", (char *)&fh->video_fmt.pixelformat));
 882         return 0;
 883 }
 884
 885 static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f)
 886 {
 887         struct saa7146_fh *fh = __fh;
 888         struct saa7146_dev *dev = fh->dev;
 889         struct saa7146_vv *vv = dev->vv_data;
 890         int err;
 891
 892         DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh));
 893         err = vidioc_try_fmt_vid_overlay(file, fh, f);
 894         if (0 != err)
 895                 return err;
 896         fh->ov.win    = f->fmt.win;
 897         fh->ov.nclips = f->fmt.win.clipcount;
 898         if (fh->ov.nclips > 16)
 899                 fh->ov.nclips = 16;
 900         if (copy_from_user(fh->ov.clips, f->fmt.win.clips,
 901                                 sizeof(struct v4l2_clip) * fh->ov.nclips)) {
 902                 return -EFAULT;
 903         }
 904
 905         /* fh->ov.fh is used to indicate that we have valid overlay informations, too */
 906         fh->ov.fh = fh;
 907
 908         /* check if our current overlay is active */
 909         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 910                 saa7146_stop_preview(fh);
 911                 saa7146_start_preview(fh);
 912         }
 913         return 0;
 914 }
 915
 916 static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm)
 917 {
 918         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 919         struct saa7146_vv *vv = dev->vv_data;
 920
 921         *norm = vv->standard->id;
 922         return 0;
 923 }
 924
 925         /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
 926            PAL / NTSC / SECAM. if your hardware does not (or does more)
 927            -- override this function in your extension */
 928 /*
 929         case VIDIOC_ENUMSTD:
 930         {
 931                 struct v4l2_standard *e = arg;
 932                 if (e->index < 0 )
 933                         return -EINVAL;
 934                 if( e->index < dev->ext_vv_data->num_stds ) {
 935                         DEB_EE(("VIDIOC_ENUMSTD: index:%d\n",e->index));
 936                         v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
 937                         return 0;
 938                 }
 939                 return -EINVAL;
 940         }
 941         */
 942
 943 static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id *id)
 944 {
 945         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 946         struct saa7146_vv *vv = dev->vv_data;
 947         int found = 0;
 948         int err, i;
 949
 950         DEB_EE(("VIDIOC_S_STD\n"));
 951
 952         if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
 953                 DEB_D(("cannot change video standard while streaming capture is active\n"));
 954                 return -EBUSY;
 955         }
 956
 957         if ((vv->video_status & STATUS_OVERLAY) != 0) {
 958                 vv->ov_suspend = vv->video_fh;
 959                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
 960                 if (0 != err) {
 961                         DEB_D(("suspending video failed. aborting\n"));
 962                         return err;
 963                 }
 964         }
 965
 966         for (i = 0; i < dev->ext_vv_data->num_stds; i++)
 967                 if (*id & dev->ext_vv_data->stds[i].id)
 968                         break;
 969         if (i != dev->ext_vv_data->num_stds) {
 970                 vv->standard = &dev->ext_vv_data->stds[i];
 971                 if (NULL != dev->ext_vv_data->std_callback)
 972                         dev->ext_vv_data->std_callback(dev, vv->standard);
 973                 found = 1;
 974         }
 975
 976         if (vv->ov_suspend != NULL) {
 977                 saa7146_start_preview(vv->ov_suspend);
 978                 vv->ov_suspend = NULL;
 979         }
 980
 981         if (!found) {
 982                 DEB_EE(("VIDIOC_S_STD: standard not found.\n"));
 983                 return -EINVAL;
 984         }
 985
 986         DEB_EE(("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name));
 987         return 0;
 988 }
 989
 990 static int vidioc_overlay(struct file *file, void *fh, unsigned int on)
 991 {
 992         int err;
 993
 994         DEB_D(("VIDIOC_OVERLAY on:%d\n", on));
 995         if (on)
 996                 err = saa7146_start_preview(fh);
 997         else
 998                 err = saa7146_stop_preview(fh);
 999         return err;
1000 }
1001
1002 static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b)
1003 {
1004         struct saa7146_fh *fh = __fh;
1005
1006         if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1007                 return videobuf_reqbufs(&fh->video_q, b);
1008         if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1009                 return videobuf_reqbufs(&fh->vbi_q, b);
1010         return -EINVAL;
1011 }
1012
1013 static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1014 {
1015         struct saa7146_fh *fh = __fh;
1016
1017         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1018                 return videobuf_querybuf(&fh->video_q, buf);
1019         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1020                 return videobuf_querybuf(&fh->vbi_q, buf);
1021         return -EINVAL;
1022 }
1023
1024 static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1025 {
1026         struct saa7146_fh *fh = __fh;
1027
1028         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1029                 return videobuf_qbuf(&fh->video_q, buf);
1030         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1031                 return videobuf_qbuf(&fh->vbi_q, buf);
1032         return -EINVAL;
1033 }
1034
1035 static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1036 {
1037         struct saa7146_fh *fh = __fh;
1038
1039         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1040                 return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK);
1041         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1042                 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK);
1043         return -EINVAL;
1044 }
1045
1046 static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
1047 {
1048         struct saa7146_fh *fh = __fh;
1049         int err;
1050
1051         DEB_D(("VIDIOC_STREAMON, type:%d\n", type));
1052
1053         err = video_begin(fh);
1054         if (err)
1055                 return err;
1056         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1057                 return videobuf_streamon(&fh->video_q);
1058         if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1059                 return videobuf_streamon(&fh->vbi_q);
1060         return -EINVAL;
1061 }
1062
1063 static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
1064 {
1065         struct saa7146_fh *fh = __fh;
1066         struct saa7146_dev *dev = fh->dev;
1067         struct saa7146_vv *vv = dev->vv_data;
1068         int err;
1069
1070         DEB_D(("VIDIOC_STREAMOFF, type:%d\n", type));
1071
1072         /* ugly: we need to copy some checks from video_end(),
1073            because videobuf_streamoff() relies on the capture running.
1074            check and fix this */
1075         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
1076                 DEB_S(("not capturing.\n"));
1077                 return 0;
1078         }
1079
1080         if (vv->video_fh != fh) {
1081                 DEB_S(("capturing, but in another open.\n"));
1082                 return -EBUSY;
1083         }
1084
1085         err = -EINVAL;
1086         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1087                 err = videobuf_streamoff(&fh->video_q);
1088         else if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1089                 err = videobuf_streamoff(&fh->vbi_q);
1090         if (0 != err) {
1091                 DEB_D(("warning: videobuf_streamoff() failed.\n"));
1092                 video_end(fh, file);
1093         } else {
1094                 err = video_end(fh, file);
1095         }
1096         return err;
1097 }
1098
1099 static int vidioc_g_chip_ident(struct file *file, void *__fh,
1100                 struct v4l2_dbg_chip_ident *chip)
1101 {
1102         struct saa7146_fh *fh = __fh;
1103         struct saa7146_dev *dev = fh->dev;
1104
1105         chip->ident = V4L2_IDENT_NONE;
1106         chip->revision = 0;
1107         if (chip->match.type == V4L2_CHIP_MATCH_HOST && !chip->match.addr) {
1108                 chip->ident = V4L2_IDENT_SAA7146;
1109                 return 0;
1110         }
1111         return v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1112                         core, g_chip_ident, chip);
1113 }
1114
1115 const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
1116         .vidioc_querycap             = vidioc_querycap,
1117         .vidioc_enum_fmt_vid_cap     = vidioc_enum_fmt_vid_cap,
1118         .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap,
1119         .vidioc_g_fmt_vid_cap        = vidioc_g_fmt_vid_cap,
1120         .vidioc_try_fmt_vid_cap      = vidioc_try_fmt_vid_cap,
1121         .vidioc_s_fmt_vid_cap        = vidioc_s_fmt_vid_cap,
1122         .vidioc_g_fmt_vid_overlay    = vidioc_g_fmt_vid_overlay,
1123         .vidioc_try_fmt_vid_overlay  = vidioc_try_fmt_vid_overlay,
1124         .vidioc_s_fmt_vid_overlay    = vidioc_s_fmt_vid_overlay,
1125         .vidioc_g_fmt_vbi_cap        = vidioc_g_fmt_vbi_cap,
1126         .vidioc_g_chip_ident         = vidioc_g_chip_ident,
1127
1128         .vidioc_overlay              = vidioc_overlay,
1129         .vidioc_g_fbuf               = vidioc_g_fbuf,
1130         .vidioc_s_fbuf               = vidioc_s_fbuf,
1131         .vidioc_reqbufs              = vidioc_reqbufs,
1132         .vidioc_querybuf             = vidioc_querybuf,
1133         .vidioc_qbuf                 = vidioc_qbuf,
1134         .vidioc_dqbuf                = vidioc_dqbuf,
1135         .vidioc_g_std                = vidioc_g_std,
1136         .vidioc_s_std                = vidioc_s_std,
1137         .vidioc_queryctrl            = vidioc_queryctrl,
1138         .vidioc_g_ctrl               = vidioc_g_ctrl,
1139         .vidioc_s_ctrl               = vidioc_s_ctrl,
1140         .vidioc_streamon             = vidioc_streamon,
1141         .vidioc_streamoff            = vidioc_streamoff,
1142         .vidioc_g_parm               = vidioc_g_parm,
1143 };
1144
1145 /*********************************************************************************/
1146 /* buffer handling functions                                                  */
1147
1148 static int buffer_activate (struct saa7146_dev *dev,
1149                      struct saa7146_buf *buf,
1150                      struct saa7146_buf *next)
1151 {
1152         struct saa7146_vv *vv = dev->vv_data;
1153
1154         buf->vb.state = VIDEOBUF_ACTIVE;
1155         saa7146_set_capture(dev,buf,next);
1156
1157         mod_timer(&vv->video_q.timeout, jiffies+BUFFER_TIMEOUT);
1158         return 0;
1159 }
1160
1161 static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf)
1162 {
1163         saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1164         saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1165         saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1166 }
1167
1168 static int buffer_prepare(struct videobuf_queue *q,
1169                           struct videobuf_buffer *vb, enum v4l2_field field)
1170 {
1171         struct file *file = q->priv_data;
1172         struct saa7146_fh *fh = file->private_data;
1173         struct saa7146_dev *dev = fh->dev;
1174         struct saa7146_vv *vv = dev->vv_data;
1175         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1176         int size,err = 0;
1177
1178         DEB_CAP(("vbuf:%p\n",vb));
1179
1180         /* sanity checks */
1181         if (fh->video_fmt.width  < 48 ||
1182             fh->video_fmt.height < 32 ||
1183             fh->video_fmt.width  > vv->standard->h_max_out ||
1184             fh->video_fmt.height > vv->standard->v_max_out) {
1185                 DEB_D(("w (%d) / h (%d) out of bounds.\n",fh->video_fmt.width,fh->video_fmt.height));
1186                 return -EINVAL;
1187         }
1188
1189         size = fh->video_fmt.sizeimage;
1190         if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1191                 DEB_D(("size mismatch.\n"));
1192                 return -EINVAL;
1193         }
1194
1195         DEB_CAP(("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1196                 fh->video_fmt.width,fh->video_fmt.height,size,v4l2_field_names[fh->video_fmt.field]));
1197         if (buf->vb.width  != fh->video_fmt.width  ||
1198             buf->vb.bytesperline != fh->video_fmt.bytesperline ||
1199             buf->vb.height != fh->video_fmt.height ||
1200             buf->vb.size   != size ||
1201             buf->vb.field  != field      ||
1202             buf->vb.field  != fh->video_fmt.field  ||
1203             buf->fmt       != &fh->video_fmt) {
1204                 saa7146_dma_free(dev,q,buf);
1205         }
1206
1207         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1208                 struct saa7146_format *sfmt;
1209
1210                 buf->vb.bytesperline  = fh->video_fmt.bytesperline;
1211                 buf->vb.width  = fh->video_fmt.width;
1212                 buf->vb.height = fh->video_fmt.height;
1213                 buf->vb.size   = size;
1214                 buf->vb.field  = field;
1215                 buf->fmt       = &fh->video_fmt;
1216                 buf->vb.field  = fh->video_fmt.field;
1217
1218                 sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
1219
1220                 release_all_pagetables(dev, buf);
1221                 if( 0 != IS_PLANAR(sfmt->trans)) {
1222                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1223                         saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1224                         saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1225                 } else {
1226                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1227                 }
1228
1229                 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1230                 if (err)
1231                         goto oops;
1232                 err = saa7146_pgtable_build(dev,buf);
1233                 if (err)
1234                         goto oops;
1235         }
1236         buf->vb.state = VIDEOBUF_PREPARED;
1237         buf->activate = buffer_activate;
1238
1239         return 0;
1240
1241  oops:
1242         DEB_D(("error out.\n"));
1243         saa7146_dma_free(dev,q,buf);
1244
1245         return err;
1246 }
1247
1248 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1249 {
1250         struct file *file = q->priv_data;
1251         struct saa7146_fh *fh = file->private_data;
1252
1253         if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1254                 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1255
1256         *size = fh->video_fmt.sizeimage;
1257
1258         /* check if we exceed the "max_memory" parameter */
1259         if( (*count * *size) > (max_memory*1048576) ) {
1260                 *count = (max_memory*1048576) / *size;
1261         }
1262
1263         DEB_CAP(("%d buffers, %d bytes each.\n",*count,*size));
1264
1265         return 0;
1266 }
1267
1268 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1269 {
1270         struct file *file = q->priv_data;
1271         struct saa7146_fh *fh = file->private_data;
1272         struct saa7146_dev *dev = fh->dev;
1273         struct saa7146_vv *vv = dev->vv_data;
1274         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1275
1276         DEB_CAP(("vbuf:%p\n",vb));
1277         saa7146_buffer_queue(fh->dev,&vv->video_q,buf);
1278 }
1279
1280 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1281 {
1282         struct file *file = q->priv_data;
1283         struct saa7146_fh *fh = file->private_data;
1284         struct saa7146_dev *dev = fh->dev;
1285         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1286
1287         DEB_CAP(("vbuf:%p\n",vb));
1288
1289         saa7146_dma_free(dev,q,buf);
1290
1291         release_all_pagetables(dev, buf);
1292 }
1293
1294 static struct videobuf_queue_ops video_qops = {
1295         .buf_setup    = buffer_setup,
1296         .buf_prepare  = buffer_prepare,
1297         .buf_queue    = buffer_queue,
1298         .buf_release  = buffer_release,
1299 };
1300
1301 /********************************************************************************/
1302 /* file operations */
1303
1304 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1305 {
1306         INIT_LIST_HEAD(&vv->video_q.queue);
1307
1308         init_timer(&vv->video_q.timeout);
1309         vv->video_q.timeout.function = saa7146_buffer_timeout;
1310         vv->video_q.timeout.data     = (unsigned long)(&vv->video_q);
1311         vv->video_q.dev              = dev;
1312
1313         /* set some default values */
1314         vv->standard = &dev->ext_vv_data->stds[0];
1315
1316         /* FIXME: what's this? */
1317         vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1318         vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1319 }
1320
1321
1322 static int video_open(struct saa7146_dev *dev, struct file *file)
1323 {
1324         struct saa7146_fh *fh = file->private_data;
1325         struct saa7146_format *sfmt;
1326
1327         fh->video_fmt.width = 384;
1328         fh->video_fmt.height = 288;
1329         fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24;
1330         fh->video_fmt.bytesperline = 0;
1331         fh->video_fmt.field = V4L2_FIELD_ANY;
1332         sfmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat);
1333         fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8;
1334
1335         videobuf_queue_sg_init(&fh->video_q, &video_qops,
1336                             &dev->pci->dev, &dev->slock,
1337                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
1338                             V4L2_FIELD_INTERLACED,
1339                             sizeof(struct saa7146_buf),
1340                             file, &dev->v4l2_lock);
1341
1342         return 0;
1343 }
1344
1345
1346 static void video_close(struct saa7146_dev *dev, struct file *file)
1347 {
1348         struct saa7146_fh *fh = file->private_data;
1349         struct saa7146_vv *vv = dev->vv_data;
1350         struct videobuf_queue *q = &fh->video_q;
1351         int err;
1352
1353         if (IS_CAPTURE_ACTIVE(fh) != 0) {
1354                 err = video_end(fh, file);
1355         } else if (IS_OVERLAY_ACTIVE(fh) != 0) {
1356                 err = saa7146_stop_preview(fh);
1357         }
1358
1359         videobuf_stop(q);
1360
1361         /* hmm, why is this function declared void? */
1362         /* return err */
1363 }
1364
1365
1366 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1367 {
1368         struct saa7146_vv *vv = dev->vv_data;
1369         struct saa7146_dmaqueue *q = &vv->video_q;
1370
1371         spin_lock(&dev->slock);
1372         DEB_CAP(("called.\n"));
1373
1374         /* only finish the buffer if we have one... */
1375         if( NULL != q->curr ) {
1376                 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1377         }
1378         saa7146_buffer_next(dev,q,0);
1379
1380         spin_unlock(&dev->slock);
1381 }
1382
1383 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1384 {
1385         struct saa7146_fh *fh = file->private_data;
1386         struct saa7146_dev *dev = fh->dev;
1387         struct saa7146_vv *vv = dev->vv_data;
1388         ssize_t ret = 0;
1389
1390         DEB_EE(("called.\n"));
1391
1392         if ((vv->video_status & STATUS_CAPTURE) != 0) {
1393                 /* fixme: should we allow read() captures while streaming capture? */
1394                 if (vv->video_fh == fh) {
1395                         DEB_S(("already capturing.\n"));
1396                         return -EBUSY;
1397                 }
1398                 DEB_S(("already capturing in another open.\n"));
1399                 return -EBUSY;
1400         }
1401
1402         ret = video_begin(fh);
1403         if( 0 != ret) {
1404                 goto out;
1405         }
1406
1407         ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1408                                 file->f_flags & O_NONBLOCK);
1409         if (ret != 0) {
1410                 video_end(fh, file);
1411         } else {
1412                 ret = video_end(fh, file);
1413         }
1414 out:
1415         /* restart overlay if it was active before */
1416         if (vv->ov_suspend != NULL) {
1417                 saa7146_start_preview(vv->ov_suspend);
1418                 vv->ov_suspend = NULL;
1419         }
1420
1421         return ret;
1422 }
1423
1424 struct saa7146_use_ops saa7146_video_uops = {
1425         .init = video_init,
1426         .open = video_open,
1427         .release = video_close,
1428         .irq_done = video_irq_done,
1429         .read = video_read,
1430 };