drivers/media/common/saa7146_video.c

   1 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   2
   3 #include <media/saa7146_vv.h>
   4 #include <media/v4l2-chip-ident.h>
   5 #include <media/v4l2-event.h>
   6 #include <media/v4l2-ctrls.h>
   7 #include <linux/module.h>
   8
   9 static int max_memory = 32;
  10
  11 module_param(max_memory, int, 0644);
  12 MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)");
  13
  14 #define IS_CAPTURE_ACTIVE(fh) \
  15         (((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh))
  16
  17 #define IS_OVERLAY_ACTIVE(fh) \
  18         (((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh))
  19
  20 /* format descriptions for capture and preview */
  21 static struct saa7146_format formats[] = {
  22         {
  23                 .name           = "RGB-8 (3-3-2)",
  24                 .pixelformat    = V4L2_PIX_FMT_RGB332,
  25                 .trans          = RGB08_COMPOSED,
  26                 .depth          = 8,
  27                 .flags          = 0,
  28         }, {
  29                 .name           = "RGB-16 (5/B-6/G-5/R)",
  30                 .pixelformat    = V4L2_PIX_FMT_RGB565,
  31                 .trans          = RGB16_COMPOSED,
  32                 .depth          = 16,
  33                 .flags          = 0,
  34         }, {
  35                 .name           = "RGB-24 (B-G-R)",
  36                 .pixelformat    = V4L2_PIX_FMT_BGR24,
  37                 .trans          = RGB24_COMPOSED,
  38                 .depth          = 24,
  39                 .flags          = 0,
  40         }, {
  41                 .name           = "RGB-32 (B-G-R)",
  42                 .pixelformat    = V4L2_PIX_FMT_BGR32,
  43                 .trans          = RGB32_COMPOSED,
  44                 .depth          = 32,
  45                 .flags          = 0,
  46         }, {
  47                 .name           = "RGB-32 (R-G-B)",
  48                 .pixelformat    = V4L2_PIX_FMT_RGB32,
  49                 .trans          = RGB32_COMPOSED,
  50                 .depth          = 32,
  51                 .flags          = 0,
  52                 .swap           = 0x2,
  53         }, {
  54                 .name           = "Greyscale-8",
  55                 .pixelformat    = V4L2_PIX_FMT_GREY,
  56                 .trans          = Y8,
  57                 .depth          = 8,
  58                 .flags          = 0,
  59         }, {
  60                 .name           = "YUV 4:2:2 planar (Y-Cb-Cr)",
  61                 .pixelformat    = V4L2_PIX_FMT_YUV422P,
  62                 .trans          = YUV422_DECOMPOSED,
  63                 .depth          = 16,
  64                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
  65         }, {
  66                 .name           = "YVU 4:2:0 planar (Y-Cb-Cr)",
  67                 .pixelformat    = V4L2_PIX_FMT_YVU420,
  68                 .trans          = YUV420_DECOMPOSED,
  69                 .depth          = 12,
  70                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
  71         }, {
  72                 .name           = "YUV 4:2:0 planar (Y-Cb-Cr)",
  73                 .pixelformat    = V4L2_PIX_FMT_YUV420,
  74                 .trans          = YUV420_DECOMPOSED,
  75                 .depth          = 12,
  76                 .flags          = FORMAT_IS_PLANAR,
  77         }, {
  78                 .name           = "YUV 4:2:2 (U-Y-V-Y)",
  79                 .pixelformat    = V4L2_PIX_FMT_UYVY,
  80                 .trans          = YUV422_COMPOSED,
  81                 .depth          = 16,
  82                 .flags          = 0,
  83         }
  84 };
  85
  86 /* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps.
  87    due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped
  88    (like V4L2_PIX_FMT_YUYV) ... 8-( */
  89
  90 static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
  91
  92 struct saa7146_format* saa7146_format_by_fourcc(struct saa7146_dev *dev, int fourcc)
  93 {
  94         int i, j = NUM_FORMATS;
  95
  96         for (i = 0; i < j; i++) {
  97                 if (formats[i].pixelformat == fourcc) {
  98                         return formats+i;
  99                 }
 100         }
 101
 102         DEB_D("unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
 103         return NULL;
 104 }
 105
 106 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f);
 107
 108 int saa7146_start_preview(struct saa7146_fh *fh)
 109 {
 110         struct saa7146_dev *dev = fh->dev;
 111         struct saa7146_vv *vv = dev->vv_data;
 112         struct v4l2_format fmt;
 113         int ret = 0, err = 0;
 114
 115         DEB_EE("dev:%p, fh:%p\n", dev, fh);
 116
 117         /* check if we have overlay information */
 118         if (vv->ov.fh == NULL) {
 119                 DEB_D("no overlay data available. try S_FMT first.\n");
 120                 return -EAGAIN;
 121         }
 122
 123         /* check if streaming capture is running */
 124         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 125                 DEB_D("streaming capture is active\n");
 126                 return -EBUSY;
 127         }
 128
 129         /* check if overlay is running */
 130         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 131                 if (vv->video_fh == fh) {
 132                         DEB_D("overlay is already active\n");
 133                         return 0;
 134                 }
 135                 DEB_D("overlay is already active in another open\n");
 136                 return -EBUSY;
 137         }
 138
 139         if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
 140                 DEB_D("cannot get necessary overlay resources\n");
 141                 return -EBUSY;
 142         }
 143
 144         fmt.fmt.win = vv->ov.win;
 145         err = vidioc_try_fmt_vid_overlay(NULL, fh, &fmt);
 146         if (0 != err) {
 147                 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 148                 return -EBUSY;
 149         }
 150         vv->ov.win = fmt.fmt.win;
 151
 152         DEB_D("%dx%d+%d+%d %s field=%s\n",
 153               vv->ov.win.w.width, vv->ov.win.w.height,
 154               vv->ov.win.w.left, vv->ov.win.w.top,
 155               vv->ov_fmt->name, v4l2_field_names[vv->ov.win.field]);
 156
 157         if (0 != (ret = saa7146_enable_overlay(fh))) {
 158                 DEB_D("enabling overlay failed: %d\n", ret);
 159                 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 160                 return ret;
 161         }
 162
 163         vv->video_status = STATUS_OVERLAY;
 164         vv->video_fh = fh;
 165
 166         return 0;
 167 }
 168 EXPORT_SYMBOL_GPL(saa7146_start_preview);
 169
 170 int saa7146_stop_preview(struct saa7146_fh *fh)
 171 {
 172         struct saa7146_dev *dev = fh->dev;
 173         struct saa7146_vv *vv = dev->vv_data;
 174
 175         DEB_EE("dev:%p, fh:%p\n", dev, fh);
 176
 177         /* check if streaming capture is running */
 178         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 179                 DEB_D("streaming capture is active\n");
 180                 return -EBUSY;
 181         }
 182
 183         /* check if overlay is running at all */
 184         if ((vv->video_status & STATUS_OVERLAY) == 0) {
 185                 DEB_D("no active overlay\n");
 186                 return 0;
 187         }
 188
 189         if (vv->video_fh != fh) {
 190                 DEB_D("overlay is active, but in another open\n");
 191                 return -EBUSY;
 192         }
 193
 194         vv->video_status = 0;
 195         vv->video_fh = NULL;
 196
 197         saa7146_disable_overlay(fh);
 198
 199         saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 200
 201         return 0;
 202 }
 203 EXPORT_SYMBOL_GPL(saa7146_stop_preview);
 204
 205 /********************************************************************************/
 206 /* common pagetable functions */
 207
 208 static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
 209 {
 210         struct pci_dev *pci = dev->pci;
 211         struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
 212         struct scatterlist *list = dma->sglist;
 213         int length = dma->sglen;
 214         struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
 215
 216         DEB_EE("dev:%p, buf:%p, sg_len:%d\n", dev, buf, length);
 217
 218         if( 0 != IS_PLANAR(sfmt->trans)) {
 219                 struct saa7146_pgtable *pt1 = &buf->pt[0];
 220                 struct saa7146_pgtable *pt2 = &buf->pt[1];
 221                 struct saa7146_pgtable *pt3 = &buf->pt[2];
 222                 __le32  *ptr1, *ptr2, *ptr3;
 223                 __le32 fill;
 224
 225                 int size = buf->fmt->width*buf->fmt->height;
 226                 int i,p,m1,m2,m3,o1,o2;
 227
 228                 switch( sfmt->depth ) {
 229                         case 12: {
 230                                 /* create some offsets inside the page table */
 231                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
 232                                 m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
 233                                 m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
 234                                 o1 = size%PAGE_SIZE;
 235                                 o2 = (size+(size/4))%PAGE_SIZE;
 236                                 DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",
 237                                         size, m1, m2, m3, o1, o2);
 238                                 break;
 239                         }
 240                         case 16: {
 241                                 /* create some offsets inside the page table */
 242                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
 243                                 m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
 244                                 m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
 245                                 o1 = size%PAGE_SIZE;
 246                                 o2 = (size+(size/2))%PAGE_SIZE;
 247                                 DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",
 248                                         size, m1, m2, m3, o1, o2);
 249                                 break;
 250                         }
 251                         default: {
 252                                 return -1;
 253                         }
 254                 }
 255
 256                 ptr1 = pt1->cpu;
 257                 ptr2 = pt2->cpu;
 258                 ptr3 = pt3->cpu;
 259
 260                 /* walk all pages, copy all page addresses to ptr1 */
 261                 for (i = 0; i < length; i++, list++) {
 262                         for (p = 0; p * 4096 < list->length; p++, ptr1++) {
 263                                 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
 264                         }
 265                 }
 266 /*
 267                 ptr1 = pt1->cpu;
 268                 for(j=0;j<40;j++) {
 269                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
 270                 }
 271 */
 272
 273                 /* if we have a user buffer, the first page may not be
 274                    aligned to a page boundary. */
 275                 pt1->offset = dma->sglist->offset;
 276                 pt2->offset = pt1->offset+o1;
 277                 pt3->offset = pt1->offset+o2;
 278
 279                 /* create video-dma2 page table */
 280                 ptr1 = pt1->cpu;
 281                 for(i = m1; i <= m2 ; i++, ptr2++) {
 282                         *ptr2 = ptr1[i];
 283                 }
 284                 fill = *(ptr2-1);
 285                 for(;i<1024;i++,ptr2++) {
 286                         *ptr2 = fill;
 287                 }
 288                 /* create video-dma3 page table */
 289                 ptr1 = pt1->cpu;
 290                 for(i = m2; i <= m3; i++,ptr3++) {
 291                         *ptr3 = ptr1[i];
 292                 }
 293                 fill = *(ptr3-1);
 294                 for(;i<1024;i++,ptr3++) {
 295                         *ptr3 = fill;
 296                 }
 297                 /* finally: finish up video-dma1 page table */
 298                 ptr1 = pt1->cpu+m1;
 299                 fill = pt1->cpu[m1];
 300                 for(i=m1;i<1024;i++,ptr1++) {
 301                         *ptr1 = fill;
 302                 }
 303 /*
 304                 ptr1 = pt1->cpu;
 305                 ptr2 = pt2->cpu;
 306                 ptr3 = pt3->cpu;
 307                 for(j=0;j<40;j++) {
 308                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
 309                 }
 310                 for(j=0;j<40;j++) {
 311                         printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
 312                 }
 313                 for(j=0;j<40;j++) {
 314                         printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
 315                 }
 316 */
 317         } else {
 318                 struct saa7146_pgtable *pt = &buf->pt[0];
 319                 return saa7146_pgtable_build_single(pci, pt, list, length);
 320         }
 321
 322         return 0;
 323 }
 324
 325
 326 /********************************************************************************/
 327 /* file operations */
 328
 329 static int video_begin(struct saa7146_fh *fh)
 330 {
 331         struct saa7146_dev *dev = fh->dev;
 332         struct saa7146_vv *vv = dev->vv_data;
 333         struct saa7146_format *fmt = NULL;
 334         unsigned int resource;
 335         int ret = 0, err = 0;
 336
 337         DEB_EE("dev:%p, fh:%p\n", dev, fh);
 338
 339         if ((vv->video_status & STATUS_CAPTURE) != 0) {
 340                 if (vv->video_fh == fh) {
 341                         DEB_S("already capturing\n");
 342                         return 0;
 343                 }
 344                 DEB_S("already capturing in another open\n");
 345                 return -EBUSY;
 346         }
 347
 348         if ((vv->video_status & STATUS_OVERLAY) != 0) {
 349                 DEB_S("warning: suspending overlay video for streaming capture\n");
 350                 vv->ov_suspend = vv->video_fh;
 351                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
 352                 if (0 != err) {
 353                         DEB_D("suspending video failed. aborting\n");
 354                         return err;
 355                 }
 356         }
 357
 358         fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat);
 359         /* we need to have a valid format set here */
 360         BUG_ON(NULL == fmt);
 361
 362         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 363                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
 364         } else {
 365                 resource = RESOURCE_DMA1_HPS;
 366         }
 367
 368         ret = saa7146_res_get(fh, resource);
 369         if (0 == ret) {
 370                 DEB_S("cannot get capture resource %d\n", resource);
 371                 if (vv->ov_suspend != NULL) {
 372                         saa7146_start_preview(vv->ov_suspend);
 373                         vv->ov_suspend = NULL;
 374                 }
 375                 return -EBUSY;
 376         }
 377
 378         /* clear out beginning of streaming bit (rps register 0)*/
 379         saa7146_write(dev, MC2, MASK_27 );
 380
 381         /* enable rps0 irqs */
 382         SAA7146_IER_ENABLE(dev, MASK_27);
 383
 384         vv->video_fh = fh;
 385         vv->video_status = STATUS_CAPTURE;
 386
 387         return 0;
 388 }
 389
 390 static int video_end(struct saa7146_fh *fh, struct file *file)
 391 {
 392         struct saa7146_dev *dev = fh->dev;
 393         struct saa7146_vv *vv = dev->vv_data;
 394         struct saa7146_format *fmt = NULL;
 395         unsigned long flags;
 396         unsigned int resource;
 397         u32 dmas = 0;
 398         DEB_EE("dev:%p, fh:%p\n", dev, fh);
 399
 400         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
 401                 DEB_S("not capturing\n");
 402                 return 0;
 403         }
 404
 405         if (vv->video_fh != fh) {
 406                 DEB_S("capturing, but in another open\n");
 407                 return -EBUSY;
 408         }
 409
 410         fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat);
 411         /* we need to have a valid format set here */
 412         BUG_ON(NULL == fmt);
 413
 414         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 415                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
 416                 dmas = MASK_22 | MASK_21 | MASK_20;
 417         } else {
 418                 resource = RESOURCE_DMA1_HPS;
 419                 dmas = MASK_22;
 420         }
 421         spin_lock_irqsave(&dev->slock,flags);
 422
 423         /* disable rps0  */
 424         saa7146_write(dev, MC1, MASK_28);
 425
 426         /* disable rps0 irqs */
 427         SAA7146_IER_DISABLE(dev, MASK_27);
 428
 429         /* shut down all used video dma transfers */
 430         saa7146_write(dev, MC1, dmas);
 431
 432         spin_unlock_irqrestore(&dev->slock, flags);
 433
 434         vv->video_fh = NULL;
 435         vv->video_status = 0;
 436
 437         saa7146_res_free(fh, resource);
 438
 439         if (vv->ov_suspend != NULL) {
 440                 saa7146_start_preview(vv->ov_suspend);
 441                 vv->ov_suspend = NULL;
 442         }
 443
 444         return 0;
 445 }
 446
 447 static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 448 {
 449         struct video_device *vdev = video_devdata(file);
 450         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 451
 452         strcpy((char *)cap->driver, "saa7146 v4l2");
 453         strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
 454         sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci));
 455         cap->device_caps =
 456                 V4L2_CAP_VIDEO_CAPTURE |
 457                 V4L2_CAP_VIDEO_OVERLAY |
 458                 V4L2_CAP_READWRITE |
 459                 V4L2_CAP_STREAMING;
 460         cap->device_caps |= dev->ext_vv_data->capabilities;
 461         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 462         if (vdev->vfl_type == VFL_TYPE_GRABBER)
 463                 cap->device_caps &=
 464                         ~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT);
 465         else
 466                 cap->device_caps &=
 467                         ~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY | V4L2_CAP_AUDIO);
 468         return 0;
 469 }
 470
 471 static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
 472 {
 473         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 474         struct saa7146_vv *vv = dev->vv_data;
 475
 476         *fb = vv->ov_fb;
 477         fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
 478         fb->flags = V4L2_FBUF_FLAG_PRIMARY;
 479         return 0;
 480 }
 481
 482 static int vidioc_s_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
 483 {
 484         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 485         struct saa7146_vv *vv = dev->vv_data;
 486         struct saa7146_format *fmt;
 487
 488         DEB_EE("VIDIOC_S_FBUF\n");
 489
 490         if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
 491                 return -EPERM;
 492
 493         /* check args */
 494         fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat);
 495         if (NULL == fmt)
 496                 return -EINVAL;
 497
 498         /* planar formats are not allowed for overlay video, clipping and video dma would clash */
 499         if (fmt->flags & FORMAT_IS_PLANAR)
 500                 DEB_S("planar pixelformat '%4.4s' not allowed for overlay\n",
 501                       (char *)&fmt->pixelformat);
 502
 503         /* check if overlay is running */
 504         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 505                 if (vv->video_fh != fh) {
 506                         DEB_D("refusing to change framebuffer informations while overlay is active in another open\n");
 507                         return -EBUSY;
 508                 }
 509         }
 510
 511         /* ok, accept it */
 512         vv->ov_fb = *fb;
 513         vv->ov_fmt = fmt;
 514
 515         if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) {
 516                 vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8;
 517                 DEB_D("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline);
 518         }
 519         return 0;
 520 }
 521
 522 static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
 523 {
 524         if (f->index >= NUM_FORMATS)
 525                 return -EINVAL;
 526         strlcpy((char *)f->description, formats[f->index].name,
 527                         sizeof(f->description));
 528         f->pixelformat = formats[f->index].pixelformat;
 529         return 0;
 530 }
 531
 532 int saa7146_s_ctrl(struct v4l2_ctrl *ctrl)
 533 {
 534         struct saa7146_dev *dev = container_of(ctrl->handler,
 535                                 struct saa7146_dev, ctrl_handler);
 536         struct saa7146_vv *vv = dev->vv_data;
 537         u32 val;
 538
 539         switch (ctrl->id) {
 540         case V4L2_CID_BRIGHTNESS:
 541                 val = saa7146_read(dev, BCS_CTRL);
 542                 val &= 0x00ffffff;
 543                 val |= (ctrl->val << 24);
 544                 saa7146_write(dev, BCS_CTRL, val);
 545                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 546                 break;
 547
 548         case V4L2_CID_CONTRAST:
 549                 val = saa7146_read(dev, BCS_CTRL);
 550                 val &= 0xff00ffff;
 551                 val |= (ctrl->val << 16);
 552                 saa7146_write(dev, BCS_CTRL, val);
 553                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 554                 break;
 555
 556         case V4L2_CID_SATURATION:
 557                 val = saa7146_read(dev, BCS_CTRL);
 558                 val &= 0xffffff00;
 559                 val |= (ctrl->val << 0);
 560                 saa7146_write(dev, BCS_CTRL, val);
 561                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 562                 break;
 563
 564         case V4L2_CID_HFLIP:
 565                 /* fixme: we can support changing VFLIP and HFLIP here... */
 566                 if ((vv->video_status & STATUS_CAPTURE))
 567                         return -EBUSY;
 568                 vv->hflip = ctrl->val;
 569                 break;
 570
 571         case V4L2_CID_VFLIP:
 572                 if ((vv->video_status & STATUS_CAPTURE))
 573                         return -EBUSY;
 574                 vv->vflip = ctrl->val;
 575                 break;
 576
 577         default:
 578                 return -EINVAL;
 579         }
 580
 581         if ((vv->video_status & STATUS_OVERLAY) != 0) { /* CHECK: && (vv->video_fh == fh)) */
 582                 struct saa7146_fh *fh = vv->video_fh;
 583
 584                 saa7146_stop_preview(fh);
 585                 saa7146_start_preview(fh);
 586         }
 587         return 0;
 588 }
 589
 590 static int vidioc_g_parm(struct file *file, void *fh,
 591                 struct v4l2_streamparm *parm)
 592 {
 593         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 594         struct saa7146_vv *vv = dev->vv_data;
 595
 596         if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 597                 return -EINVAL;
 598         parm->parm.capture.readbuffers = 1;
 599         v4l2_video_std_frame_period(vv->standard->id,
 600                                     &parm->parm.capture.timeperframe);
 601         return 0;
 602 }
 603
 604 static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
 605 {
 606         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 607         struct saa7146_vv *vv = dev->vv_data;
 608
 609         f->fmt.pix = vv->video_fmt;
 610         return 0;
 611 }
 612
 613 static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
 614 {
 615         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 616         struct saa7146_vv *vv = dev->vv_data;
 617
 618         f->fmt.win = vv->ov.win;
 619         return 0;
 620 }
 621
 622 static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f)
 623 {
 624         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 625         struct saa7146_vv *vv = dev->vv_data;
 626
 627         f->fmt.vbi = vv->vbi_fmt;
 628         return 0;
 629 }
 630
 631 static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
 632 {
 633         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 634         struct saa7146_vv *vv = dev->vv_data;
 635         struct saa7146_format *fmt;
 636         enum v4l2_field field;
 637         int maxw, maxh;
 638         int calc_bpl;
 639
 640         DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
 641
 642         fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat);
 643         if (NULL == fmt)
 644                 return -EINVAL;
 645
 646         field = f->fmt.pix.field;
 647         maxw  = vv->standard->h_max_out;
 648         maxh  = vv->standard->v_max_out;
 649
 650         if (V4L2_FIELD_ANY == field) {
 651                 field = (f->fmt.pix.height > maxh / 2)
 652                         ? V4L2_FIELD_INTERLACED
 653                         : V4L2_FIELD_BOTTOM;
 654         }
 655         switch (field) {
 656         case V4L2_FIELD_ALTERNATE:
 657                 vv->last_field = V4L2_FIELD_TOP;
 658                 maxh = maxh / 2;
 659                 break;
 660         case V4L2_FIELD_TOP:
 661         case V4L2_FIELD_BOTTOM:
 662                 vv->last_field = V4L2_FIELD_INTERLACED;
 663                 maxh = maxh / 2;
 664                 break;
 665         case V4L2_FIELD_INTERLACED:
 666                 vv->last_field = V4L2_FIELD_INTERLACED;
 667                 break;
 668         default:
 669                 DEB_D("no known field mode '%d'\n", field);
 670                 return -EINVAL;
 671         }
 672
 673         f->fmt.pix.field = field;
 674         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 675         if (f->fmt.pix.width > maxw)
 676                 f->fmt.pix.width = maxw;
 677         if (f->fmt.pix.height > maxh)
 678                 f->fmt.pix.height = maxh;
 679
 680         calc_bpl = (f->fmt.pix.width * fmt->depth) / 8;
 681
 682         if (f->fmt.pix.bytesperline < calc_bpl)
 683                 f->fmt.pix.bytesperline = calc_bpl;
 684
 685         if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */
 686                 f->fmt.pix.bytesperline = calc_bpl;
 687
 688         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
 689         DEB_D("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n",
 690               f->fmt.pix.width, f->fmt.pix.height,
 691               f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
 692
 693         return 0;
 694 }
 695
 696
 697 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
 698 {
 699         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 700         struct saa7146_vv *vv = dev->vv_data;
 701         struct v4l2_window *win = &f->fmt.win;
 702         enum v4l2_field field;
 703         int maxw, maxh;
 704
 705         DEB_EE("dev:%p\n", dev);
 706
 707         if (NULL == vv->ov_fb.base) {
 708                 DEB_D("no fb base set\n");
 709                 return -EINVAL;
 710         }
 711         if (NULL == vv->ov_fmt) {
 712                 DEB_D("no fb fmt set\n");
 713                 return -EINVAL;
 714         }
 715         if (win->w.width < 48 || win->w.height < 32) {
 716                 DEB_D("min width/height. (%d,%d)\n",
 717                       win->w.width, win->w.height);
 718                 return -EINVAL;
 719         }
 720         if (win->clipcount > 16) {
 721                 DEB_D("clipcount too big\n");
 722                 return -EINVAL;
 723         }
 724
 725         field = win->field;
 726         maxw  = vv->standard->h_max_out;
 727         maxh  = vv->standard->v_max_out;
 728
 729         if (V4L2_FIELD_ANY == field) {
 730                 field = (win->w.height > maxh / 2)
 731                         ? V4L2_FIELD_INTERLACED
 732                         : V4L2_FIELD_TOP;
 733                 }
 734         switch (field) {
 735         case V4L2_FIELD_TOP:
 736         case V4L2_FIELD_BOTTOM:
 737         case V4L2_FIELD_ALTERNATE:
 738                 maxh = maxh / 2;
 739                 break;
 740         case V4L2_FIELD_INTERLACED:
 741                 break;
 742         default:
 743                 DEB_D("no known field mode '%d'\n", field);
 744                 return -EINVAL;
 745         }
 746
 747         win->field = field;
 748         if (win->w.width > maxw)
 749                 win->w.width = maxw;
 750         if (win->w.height > maxh)
 751                 win->w.height = maxh;
 752
 753         return 0;
 754 }
 755
 756 static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f)
 757 {
 758         struct saa7146_fh *fh = __fh;
 759         struct saa7146_dev *dev = fh->dev;
 760         struct saa7146_vv *vv = dev->vv_data;
 761         int err;
 762
 763         DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
 764         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 765                 DEB_EE("streaming capture is active\n");
 766                 return -EBUSY;
 767         }
 768         err = vidioc_try_fmt_vid_cap(file, fh, f);
 769         if (0 != err)
 770                 return err;
 771         vv->video_fmt = f->fmt.pix;
 772         DEB_EE("set to pixelformat '%4.4s'\n",
 773                (char *)&vv->video_fmt.pixelformat);
 774         return 0;
 775 }
 776
 777 static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f)
 778 {
 779         struct saa7146_fh *fh = __fh;
 780         struct saa7146_dev *dev = fh->dev;
 781         struct saa7146_vv *vv = dev->vv_data;
 782         int err;
 783
 784         DEB_EE("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh);
 785         err = vidioc_try_fmt_vid_overlay(file, fh, f);
 786         if (0 != err)
 787                 return err;
 788         vv->ov.win    = f->fmt.win;
 789         vv->ov.nclips = f->fmt.win.clipcount;
 790         if (vv->ov.nclips > 16)
 791                 vv->ov.nclips = 16;
 792         if (copy_from_user(vv->ov.clips, f->fmt.win.clips,
 793                                 sizeof(struct v4l2_clip) * vv->ov.nclips)) {
 794                 return -EFAULT;
 795         }
 796
 797         /* vv->ov.fh is used to indicate that we have valid overlay informations, too */
 798         vv->ov.fh = fh;
 799
 800         /* check if our current overlay is active */
 801         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 802                 saa7146_stop_preview(fh);
 803                 saa7146_start_preview(fh);
 804         }
 805         return 0;
 806 }
 807
 808 static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm)
 809 {
 810         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 811         struct saa7146_vv *vv = dev->vv_data;
 812
 813         *norm = vv->standard->id;
 814         return 0;
 815 }
 816
 817         /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
 818            PAL / NTSC / SECAM. if your hardware does not (or does more)
 819            -- override this function in your extension */
 820 /*
 821         case VIDIOC_ENUMSTD:
 822         {
 823                 struct v4l2_standard *e = arg;
 824                 if (e->index < 0 )
 825                         return -EINVAL;
 826                 if( e->index < dev->ext_vv_data->num_stds ) {
 827                         DEB_EE("VIDIOC_ENUMSTD: index:%d\n", e->index);
 828                         v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
 829                         return 0;
 830                 }
 831                 return -EINVAL;
 832         }
 833         */
 834
 835 static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id *id)
 836 {
 837         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 838         struct saa7146_vv *vv = dev->vv_data;
 839         int found = 0;
 840         int err, i;
 841
 842         DEB_EE("VIDIOC_S_STD\n");
 843
 844         if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
 845                 DEB_D("cannot change video standard while streaming capture is active\n");
 846                 return -EBUSY;
 847         }
 848
 849         if ((vv->video_status & STATUS_OVERLAY) != 0) {
 850                 vv->ov_suspend = vv->video_fh;
 851                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
 852                 if (0 != err) {
 853                         DEB_D("suspending video failed. aborting\n");
 854                         return err;
 855                 }
 856         }
 857
 858         for (i = 0; i < dev->ext_vv_data->num_stds; i++)
 859                 if (*id & dev->ext_vv_data->stds[i].id)
 860                         break;
 861         if (i != dev->ext_vv_data->num_stds) {
 862                 vv->standard = &dev->ext_vv_data->stds[i];
 863                 if (NULL != dev->ext_vv_data->std_callback)
 864                         dev->ext_vv_data->std_callback(dev, vv->standard);
 865                 found = 1;
 866         }
 867
 868         if (vv->ov_suspend != NULL) {
 869                 saa7146_start_preview(vv->ov_suspend);
 870                 vv->ov_suspend = NULL;
 871         }
 872
 873         if (!found) {
 874                 DEB_EE("VIDIOC_S_STD: standard not found\n");
 875                 return -EINVAL;
 876         }
 877
 878         DEB_EE("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name);
 879         return 0;
 880 }
 881
 882 static int vidioc_overlay(struct file *file, void *fh, unsigned int on)
 883 {
 884         int err;
 885
 886         DEB_D("VIDIOC_OVERLAY on:%d\n", on);
 887         if (on)
 888                 err = saa7146_start_preview(fh);
 889         else
 890                 err = saa7146_stop_preview(fh);
 891         return err;
 892 }
 893
 894 static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b)
 895 {
 896         struct saa7146_fh *fh = __fh;
 897
 898         if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 899                 return videobuf_reqbufs(&fh->video_q, b);
 900         if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE)
 901                 return videobuf_reqbufs(&fh->vbi_q, b);
 902         return -EINVAL;
 903 }
 904
 905 static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
 906 {
 907         struct saa7146_fh *fh = __fh;
 908
 909         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 910                 return videobuf_querybuf(&fh->video_q, buf);
 911         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
 912                 return videobuf_querybuf(&fh->vbi_q, buf);
 913         return -EINVAL;
 914 }
 915
 916 static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
 917 {
 918         struct saa7146_fh *fh = __fh;
 919
 920         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 921                 return videobuf_qbuf(&fh->video_q, buf);
 922         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
 923                 return videobuf_qbuf(&fh->vbi_q, buf);
 924         return -EINVAL;
 925 }
 926
 927 static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
 928 {
 929         struct saa7146_fh *fh = __fh;
 930
 931         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 932                 return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK);
 933         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
 934                 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK);
 935         return -EINVAL;
 936 }
 937
 938 static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
 939 {
 940         struct saa7146_fh *fh = __fh;
 941         int err;
 942
 943         DEB_D("VIDIOC_STREAMON, type:%d\n", type);
 944
 945         err = video_begin(fh);
 946         if (err)
 947                 return err;
 948         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 949                 return videobuf_streamon(&fh->video_q);
 950         if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
 951                 return videobuf_streamon(&fh->vbi_q);
 952         return -EINVAL;
 953 }
 954
 955 static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
 956 {
 957         struct saa7146_fh *fh = __fh;
 958         struct saa7146_dev *dev = fh->dev;
 959         struct saa7146_vv *vv = dev->vv_data;
 960         int err;
 961
 962         DEB_D("VIDIOC_STREAMOFF, type:%d\n", type);
 963
 964         /* ugly: we need to copy some checks from video_end(),
 965            because videobuf_streamoff() relies on the capture running.
 966            check and fix this */
 967         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
 968                 DEB_S("not capturing\n");
 969                 return 0;
 970         }
 971
 972         if (vv->video_fh != fh) {
 973                 DEB_S("capturing, but in another open\n");
 974                 return -EBUSY;
 975         }
 976
 977         err = -EINVAL;
 978         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 979                 err = videobuf_streamoff(&fh->video_q);
 980         else if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
 981                 err = videobuf_streamoff(&fh->vbi_q);
 982         if (0 != err) {
 983                 DEB_D("warning: videobuf_streamoff() failed\n");
 984                 video_end(fh, file);
 985         } else {
 986                 err = video_end(fh, file);
 987         }
 988         return err;
 989 }
 990
 991 static int vidioc_g_chip_ident(struct file *file, void *__fh,
 992                 struct v4l2_dbg_chip_ident *chip)
 993 {
 994         struct saa7146_fh *fh = __fh;
 995         struct saa7146_dev *dev = fh->dev;
 996
 997         chip->ident = V4L2_IDENT_NONE;
 998         chip->revision = 0;
 999         if (chip->match.type == V4L2_CHIP_MATCH_HOST) {
1000                 if (v4l2_chip_match_host(&chip->match))
1001                         chip->ident = V4L2_IDENT_SAA7146;
1002                 return 0;
1003         }
1004         if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
1005             chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
1006                 return -EINVAL;
1007         return v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1008                         core, g_chip_ident, chip);
1009 }
1010
1011 const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
1012         .vidioc_querycap             = vidioc_querycap,
1013         .vidioc_enum_fmt_vid_cap     = vidioc_enum_fmt_vid_cap,
1014         .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap,
1015         .vidioc_g_fmt_vid_cap        = vidioc_g_fmt_vid_cap,
1016         .vidioc_try_fmt_vid_cap      = vidioc_try_fmt_vid_cap,
1017         .vidioc_s_fmt_vid_cap        = vidioc_s_fmt_vid_cap,
1018         .vidioc_g_fmt_vid_overlay    = vidioc_g_fmt_vid_overlay,
1019         .vidioc_try_fmt_vid_overlay  = vidioc_try_fmt_vid_overlay,
1020         .vidioc_s_fmt_vid_overlay    = vidioc_s_fmt_vid_overlay,
1021         .vidioc_g_chip_ident         = vidioc_g_chip_ident,
1022
1023         .vidioc_overlay              = vidioc_overlay,
1024         .vidioc_g_fbuf               = vidioc_g_fbuf,
1025         .vidioc_s_fbuf               = vidioc_s_fbuf,
1026         .vidioc_reqbufs              = vidioc_reqbufs,
1027         .vidioc_querybuf             = vidioc_querybuf,
1028         .vidioc_qbuf                 = vidioc_qbuf,
1029         .vidioc_dqbuf                = vidioc_dqbuf,
1030         .vidioc_g_std                = vidioc_g_std,
1031         .vidioc_s_std                = vidioc_s_std,
1032         .vidioc_streamon             = vidioc_streamon,
1033         .vidioc_streamoff            = vidioc_streamoff,
1034         .vidioc_g_parm               = vidioc_g_parm,
1035         .vidioc_subscribe_event      = v4l2_ctrl_subscribe_event,
1036         .vidioc_unsubscribe_event    = v4l2_event_unsubscribe,
1037 };
1038
1039 const struct v4l2_ioctl_ops saa7146_vbi_ioctl_ops = {
1040         .vidioc_querycap             = vidioc_querycap,
1041         .vidioc_g_fmt_vbi_cap        = vidioc_g_fmt_vbi_cap,
1042         .vidioc_g_chip_ident         = vidioc_g_chip_ident,
1043
1044         .vidioc_reqbufs              = vidioc_reqbufs,
1045         .vidioc_querybuf             = vidioc_querybuf,
1046         .vidioc_qbuf                 = vidioc_qbuf,
1047         .vidioc_dqbuf                = vidioc_dqbuf,
1048         .vidioc_g_std                = vidioc_g_std,
1049         .vidioc_s_std                = vidioc_s_std,
1050         .vidioc_streamon             = vidioc_streamon,
1051         .vidioc_streamoff            = vidioc_streamoff,
1052         .vidioc_g_parm               = vidioc_g_parm,
1053         .vidioc_subscribe_event      = v4l2_ctrl_subscribe_event,
1054         .vidioc_unsubscribe_event    = v4l2_event_unsubscribe,
1055 };
1056
1057 /*********************************************************************************/
1058 /* buffer handling functions                                                  */
1059
1060 static int buffer_activate (struct saa7146_dev *dev,
1061                      struct saa7146_buf *buf,
1062                      struct saa7146_buf *next)
1063 {
1064         struct saa7146_vv *vv = dev->vv_data;
1065
1066         buf->vb.state = VIDEOBUF_ACTIVE;
1067         saa7146_set_capture(dev,buf,next);
1068
1069         mod_timer(&vv->video_dmaq.timeout, jiffies+BUFFER_TIMEOUT);
1070         return 0;
1071 }
1072
1073 static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf)
1074 {
1075         saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1076         saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1077         saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1078 }
1079
1080 static int buffer_prepare(struct videobuf_queue *q,
1081                           struct videobuf_buffer *vb, enum v4l2_field field)
1082 {
1083         struct file *file = q->priv_data;
1084         struct saa7146_fh *fh = file->private_data;
1085         struct saa7146_dev *dev = fh->dev;
1086         struct saa7146_vv *vv = dev->vv_data;
1087         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1088         int size,err = 0;
1089
1090         DEB_CAP("vbuf:%p\n", vb);
1091
1092         /* sanity checks */
1093         if (vv->video_fmt.width  < 48 ||
1094             vv->video_fmt.height < 32 ||
1095             vv->video_fmt.width  > vv->standard->h_max_out ||
1096             vv->video_fmt.height > vv->standard->v_max_out) {
1097                 DEB_D("w (%d) / h (%d) out of bounds\n",
1098                       vv->video_fmt.width, vv->video_fmt.height);
1099                 return -EINVAL;
1100         }
1101
1102         size = vv->video_fmt.sizeimage;
1103         if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1104                 DEB_D("size mismatch\n");
1105                 return -EINVAL;
1106         }
1107
1108         DEB_CAP("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1109                 vv->video_fmt.width, vv->video_fmt.height,
1110                 size, v4l2_field_names[vv->video_fmt.field]);
1111         if (buf->vb.width  != vv->video_fmt.width  ||
1112             buf->vb.bytesperline != vv->video_fmt.bytesperline ||
1113             buf->vb.height != vv->video_fmt.height ||
1114             buf->vb.size   != size ||
1115             buf->vb.field  != field      ||
1116             buf->vb.field  != vv->video_fmt.field  ||
1117             buf->fmt       != &vv->video_fmt) {
1118                 saa7146_dma_free(dev,q,buf);
1119         }
1120
1121         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1122                 struct saa7146_format *sfmt;
1123
1124                 buf->vb.bytesperline  = vv->video_fmt.bytesperline;
1125                 buf->vb.width  = vv->video_fmt.width;
1126                 buf->vb.height = vv->video_fmt.height;
1127                 buf->vb.size   = size;
1128                 buf->vb.field  = field;
1129                 buf->fmt       = &vv->video_fmt;
1130                 buf->vb.field  = vv->video_fmt.field;
1131
1132                 sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
1133
1134                 release_all_pagetables(dev, buf);
1135                 if( 0 != IS_PLANAR(sfmt->trans)) {
1136                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1137                         saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1138                         saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1139                 } else {
1140                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1141                 }
1142
1143                 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1144                 if (err)
1145                         goto oops;
1146                 err = saa7146_pgtable_build(dev,buf);
1147                 if (err)
1148                         goto oops;
1149         }
1150         buf->vb.state = VIDEOBUF_PREPARED;
1151         buf->activate = buffer_activate;
1152
1153         return 0;
1154
1155  oops:
1156         DEB_D("error out\n");
1157         saa7146_dma_free(dev,q,buf);
1158
1159         return err;
1160 }
1161
1162 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1163 {
1164         struct file *file = q->priv_data;
1165         struct saa7146_fh *fh = file->private_data;
1166         struct saa7146_vv *vv = fh->dev->vv_data;
1167
1168         if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1169                 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1170
1171         *size = vv->video_fmt.sizeimage;
1172
1173         /* check if we exceed the "max_memory" parameter */
1174         if( (*count * *size) > (max_memory*1048576) ) {
1175                 *count = (max_memory*1048576) / *size;
1176         }
1177
1178         DEB_CAP("%d buffers, %d bytes each\n", *count, *size);
1179
1180         return 0;
1181 }
1182
1183 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1184 {
1185         struct file *file = q->priv_data;
1186         struct saa7146_fh *fh = file->private_data;
1187         struct saa7146_dev *dev = fh->dev;
1188         struct saa7146_vv *vv = dev->vv_data;
1189         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1190
1191         DEB_CAP("vbuf:%p\n", vb);
1192         saa7146_buffer_queue(fh->dev, &vv->video_dmaq, buf);
1193 }
1194
1195 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1196 {
1197         struct file *file = q->priv_data;
1198         struct saa7146_fh *fh = file->private_data;
1199         struct saa7146_dev *dev = fh->dev;
1200         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1201
1202         DEB_CAP("vbuf:%p\n", vb);
1203
1204         saa7146_dma_free(dev,q,buf);
1205
1206         release_all_pagetables(dev, buf);
1207 }
1208
1209 static struct videobuf_queue_ops video_qops = {
1210         .buf_setup    = buffer_setup,
1211         .buf_prepare  = buffer_prepare,
1212         .buf_queue    = buffer_queue,
1213         .buf_release  = buffer_release,
1214 };
1215
1216 /********************************************************************************/
1217 /* file operations */
1218
1219 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1220 {
1221         INIT_LIST_HEAD(&vv->video_dmaq.queue);
1222
1223         init_timer(&vv->video_dmaq.timeout);
1224         vv->video_dmaq.timeout.function = saa7146_buffer_timeout;
1225         vv->video_dmaq.timeout.data     = (unsigned long)(&vv->video_dmaq);
1226         vv->video_dmaq.dev              = dev;
1227
1228         /* set some default values */
1229         vv->standard = &dev->ext_vv_data->stds[0];
1230
1231         /* FIXME: what's this? */
1232         vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1233         vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1234 }
1235
1236
1237 static int video_open(struct saa7146_dev *dev, struct file *file)
1238 {
1239         struct saa7146_fh *fh = file->private_data;
1240
1241         videobuf_queue_sg_init(&fh->video_q, &video_qops,
1242                             &dev->pci->dev, &dev->slock,
1243                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
1244                             V4L2_FIELD_INTERLACED,
1245                             sizeof(struct saa7146_buf),
1246                             file, &dev->v4l2_lock);
1247
1248         return 0;
1249 }
1250
1251
1252 static void video_close(struct saa7146_dev *dev, struct file *file)
1253 {
1254         struct saa7146_fh *fh = file->private_data;
1255         struct saa7146_vv *vv = dev->vv_data;
1256         struct videobuf_queue *q = &fh->video_q;
1257
1258         if (IS_CAPTURE_ACTIVE(fh) != 0)
1259                 video_end(fh, file);
1260         else if (IS_OVERLAY_ACTIVE(fh) != 0)
1261                 saa7146_stop_preview(fh);
1262
1263         videobuf_stop(q);
1264         /* hmm, why is this function declared void? */
1265 }
1266
1267
1268 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1269 {
1270         struct saa7146_vv *vv = dev->vv_data;
1271         struct saa7146_dmaqueue *q = &vv->video_dmaq;
1272
1273         spin_lock(&dev->slock);
1274         DEB_CAP("called\n");
1275
1276         /* only finish the buffer if we have one... */
1277         if( NULL != q->curr ) {
1278                 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1279         }
1280         saa7146_buffer_next(dev,q,0);
1281
1282         spin_unlock(&dev->slock);
1283 }
1284
1285 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1286 {
1287         struct saa7146_fh *fh = file->private_data;
1288         struct saa7146_dev *dev = fh->dev;
1289         struct saa7146_vv *vv = dev->vv_data;
1290         ssize_t ret = 0;
1291
1292         DEB_EE("called\n");
1293
1294         if ((vv->video_status & STATUS_CAPTURE) != 0) {
1295                 /* fixme: should we allow read() captures while streaming capture? */
1296                 if (vv->video_fh == fh) {
1297                         DEB_S("already capturing\n");
1298                         return -EBUSY;
1299                 }
1300                 DEB_S("already capturing in another open\n");
1301                 return -EBUSY;
1302         }
1303
1304         ret = video_begin(fh);
1305         if( 0 != ret) {
1306                 goto out;
1307         }
1308
1309         ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1310                                 file->f_flags & O_NONBLOCK);
1311         if (ret != 0) {
1312                 video_end(fh, file);
1313         } else {
1314                 ret = video_end(fh, file);
1315         }
1316 out:
1317         /* restart overlay if it was active before */
1318         if (vv->ov_suspend != NULL) {
1319                 saa7146_start_preview(vv->ov_suspend);
1320                 vv->ov_suspend = NULL;
1321         }
1322
1323         return ret;
1324 }
1325
1326 struct saa7146_use_ops saa7146_video_uops = {
1327         .init = video_init,
1328         .open = video_open,
1329         .release = video_close,
1330         .irq_done = video_irq_done,
1331         .read = video_read,
1332 };