drivers/media/common/saa7146/saa7146_video.c

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