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 <linux/module.h>
   6
   7 static int max_memory = 32;
   8
   9 module_param(max_memory, int, 0644);
  10 MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)");
  11
  12 #define IS_CAPTURE_ACTIVE(fh) \
  13         (((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh))
  14
  15 #define IS_OVERLAY_ACTIVE(fh) \
  16         (((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh))
  17
  18 /* format descriptions for capture and preview */
  19 static struct saa7146_format formats[] = {
  20         {
  21                 .name           = "RGB-8 (3-3-2)",
  22                 .pixelformat    = V4L2_PIX_FMT_RGB332,
  23                 .trans          = RGB08_COMPOSED,
  24                 .depth          = 8,
  25                 .flags          = 0,
  26         }, {
  27                 .name           = "RGB-16 (5/B-6/G-5/R)",
  28                 .pixelformat    = V4L2_PIX_FMT_RGB565,
  29                 .trans          = RGB16_COMPOSED,
  30                 .depth          = 16,
  31                 .flags          = 0,
  32         }, {
  33                 .name           = "RGB-24 (B-G-R)",
  34                 .pixelformat    = V4L2_PIX_FMT_BGR24,
  35                 .trans          = RGB24_COMPOSED,
  36                 .depth          = 24,
  37                 .flags          = 0,
  38         }, {
  39                 .name           = "RGB-32 (B-G-R)",
  40                 .pixelformat    = V4L2_PIX_FMT_BGR32,
  41                 .trans          = RGB32_COMPOSED,
  42                 .depth          = 32,
  43                 .flags          = 0,
  44         }, {
  45                 .name           = "RGB-32 (R-G-B)",
  46                 .pixelformat    = V4L2_PIX_FMT_RGB32,
  47                 .trans          = RGB32_COMPOSED,
  48                 .depth          = 32,
  49                 .flags          = 0,
  50                 .swap           = 0x2,
  51         }, {
  52                 .name           = "Greyscale-8",
  53                 .pixelformat    = V4L2_PIX_FMT_GREY,
  54                 .trans          = Y8,
  55                 .depth          = 8,
  56                 .flags          = 0,
  57         }, {
  58                 .name           = "YUV 4:2:2 planar (Y-Cb-Cr)",
  59                 .pixelformat    = V4L2_PIX_FMT_YUV422P,
  60                 .trans          = YUV422_DECOMPOSED,
  61                 .depth          = 16,
  62                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
  63         }, {
  64                 .name           = "YVU 4:2:0 planar (Y-Cb-Cr)",
  65                 .pixelformat    = V4L2_PIX_FMT_YVU420,
  66                 .trans          = YUV420_DECOMPOSED,
  67                 .depth          = 12,
  68                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
  69         }, {
  70                 .name           = "YUV 4:2:0 planar (Y-Cb-Cr)",
  71                 .pixelformat    = V4L2_PIX_FMT_YUV420,
  72                 .trans          = YUV420_DECOMPOSED,
  73                 .depth          = 12,
  74                 .flags          = FORMAT_IS_PLANAR,
  75         }, {
  76                 .name           = "YUV 4:2:2 (U-Y-V-Y)",
  77                 .pixelformat    = V4L2_PIX_FMT_UYVY,
  78                 .trans          = YUV422_COMPOSED,
  79                 .depth          = 16,
  80                 .flags          = 0,
  81         }
  82 };
  83
  84 /* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps.
  85    due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped
  86    (like V4L2_PIX_FMT_YUYV) ... 8-( */
  87
  88 static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
  89
  90 struct saa7146_format* saa7146_format_by_fourcc(struct saa7146_dev *dev, int fourcc)
  91 {
  92         int i, j = NUM_FORMATS;
  93
  94         for (i = 0; i < j; i++) {
  95                 if (formats[i].pixelformat == fourcc) {
  96                         return formats+i;
  97                 }
  98         }
  99
 100         DEB_D("unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
 101         return NULL;
 102 }
 103
 104 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f);
 105
 106 int saa7146_start_preview(struct saa7146_fh *fh)
 107 {
 108         struct saa7146_dev *dev = fh->dev;
 109         struct saa7146_vv *vv = dev->vv_data;
 110         struct v4l2_format fmt;
 111         int ret = 0, err = 0;
 112
 113         DEB_EE("dev:%p, fh:%p\n", dev, fh);
 114
 115         /* check if we have overlay informations */
 116         if( NULL == fh->ov.fh ) {
 117                 DEB_D("no overlay data available. try S_FMT first.\n");
 118                 return -EAGAIN;
 119         }
 120
 121         /* check if streaming capture is running */
 122         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 123                 DEB_D("streaming capture is active\n");
 124                 return -EBUSY;
 125         }
 126
 127         /* check if overlay is running */
 128         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 129                 if (vv->video_fh == fh) {
 130                         DEB_D("overlay is already active\n");
 131                         return 0;
 132                 }
 133                 DEB_D("overlay is already active in another open\n");
 134                 return -EBUSY;
 135         }
 136
 137         if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
 138                 DEB_D("cannot get necessary overlay resources\n");
 139                 return -EBUSY;
 140         }
 141
 142         fmt.fmt.win = fh->ov.win;
 143         err = vidioc_try_fmt_vid_overlay(NULL, fh, &fmt);
 144         if (0 != err) {
 145                 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 146                 return -EBUSY;
 147         }
 148         fh->ov.win = fmt.fmt.win;
 149         vv->ov_data = &fh->ov;
 150
 151         DEB_D("%dx%d+%d+%d %s field=%s\n",
 152               fh->ov.win.w.width, fh->ov.win.w.height,
 153               fh->ov.win.w.left, fh->ov.win.w.top,
 154               vv->ov_fmt->name, v4l2_field_names[fh->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 /* device controls */
 206
 207 static struct v4l2_queryctrl controls[] = {
 208         {
 209                 .id             = V4L2_CID_BRIGHTNESS,
 210                 .name           = "Brightness",
 211                 .minimum        = 0,
 212                 .maximum        = 255,
 213                 .step           = 1,
 214                 .default_value  = 128,
 215                 .type           = V4L2_CTRL_TYPE_INTEGER,
 216                 .flags          = V4L2_CTRL_FLAG_SLIDER,
 217         },{
 218                 .id             = V4L2_CID_CONTRAST,
 219                 .name           = "Contrast",
 220                 .minimum        = 0,
 221                 .maximum        = 127,
 222                 .step           = 1,
 223                 .default_value  = 64,
 224                 .type           = V4L2_CTRL_TYPE_INTEGER,
 225                 .flags          = V4L2_CTRL_FLAG_SLIDER,
 226         },{
 227                 .id             = V4L2_CID_SATURATION,
 228                 .name           = "Saturation",
 229                 .minimum        = 0,
 230                 .maximum        = 127,
 231                 .step           = 1,
 232                 .default_value  = 64,
 233                 .type           = V4L2_CTRL_TYPE_INTEGER,
 234                 .flags          = V4L2_CTRL_FLAG_SLIDER,
 235         },{
 236                 .id             = V4L2_CID_VFLIP,
 237                 .name           = "Vertical Flip",
 238                 .minimum        = 0,
 239                 .maximum        = 1,
 240                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
 241         },{
 242                 .id             = V4L2_CID_HFLIP,
 243                 .name           = "Horizontal Flip",
 244                 .minimum        = 0,
 245                 .maximum        = 1,
 246                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
 247         },
 248 };
 249 static int NUM_CONTROLS = sizeof(controls)/sizeof(struct v4l2_queryctrl);
 250
 251 #define V4L2_CID_PRIVATE_LASTP1      (V4L2_CID_PRIVATE_BASE + 0)
 252
 253 static struct v4l2_queryctrl* ctrl_by_id(int id)
 254 {
 255         int i;
 256
 257         for (i = 0; i < NUM_CONTROLS; i++)
 258                 if (controls[i].id == id)
 259                         return controls+i;
 260         return NULL;
 261 }
 262
 263 /********************************************************************************/
 264 /* common pagetable functions */
 265
 266 static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
 267 {
 268         struct pci_dev *pci = dev->pci;
 269         struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
 270         struct scatterlist *list = dma->sglist;
 271         int length = dma->sglen;
 272         struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
 273
 274         DEB_EE("dev:%p, buf:%p, sg_len:%d\n", dev, buf, length);
 275
 276         if( 0 != IS_PLANAR(sfmt->trans)) {
 277                 struct saa7146_pgtable *pt1 = &buf->pt[0];
 278                 struct saa7146_pgtable *pt2 = &buf->pt[1];
 279                 struct saa7146_pgtable *pt3 = &buf->pt[2];
 280                 __le32  *ptr1, *ptr2, *ptr3;
 281                 __le32 fill;
 282
 283                 int size = buf->fmt->width*buf->fmt->height;
 284                 int i,p,m1,m2,m3,o1,o2;
 285
 286                 switch( sfmt->depth ) {
 287                         case 12: {
 288                                 /* create some offsets inside the page table */
 289                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
 290                                 m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
 291                                 m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
 292                                 o1 = size%PAGE_SIZE;
 293                                 o2 = (size+(size/4))%PAGE_SIZE;
 294                                 DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",
 295                                         size, m1, m2, m3, o1, o2);
 296                                 break;
 297                         }
 298                         case 16: {
 299                                 /* create some offsets inside the page table */
 300                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
 301                                 m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
 302                                 m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
 303                                 o1 = size%PAGE_SIZE;
 304                                 o2 = (size+(size/2))%PAGE_SIZE;
 305                                 DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",
 306                                         size, m1, m2, m3, o1, o2);
 307                                 break;
 308                         }
 309                         default: {
 310                                 return -1;
 311                         }
 312                 }
 313
 314                 ptr1 = pt1->cpu;
 315                 ptr2 = pt2->cpu;
 316                 ptr3 = pt3->cpu;
 317
 318                 /* walk all pages, copy all page addresses to ptr1 */
 319                 for (i = 0; i < length; i++, list++) {
 320                         for (p = 0; p * 4096 < list->length; p++, ptr1++) {
 321                                 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
 322                         }
 323                 }
 324 /*
 325                 ptr1 = pt1->cpu;
 326                 for(j=0;j<40;j++) {
 327                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
 328                 }
 329 */
 330
 331                 /* if we have a user buffer, the first page may not be
 332                    aligned to a page boundary. */
 333                 pt1->offset = dma->sglist->offset;
 334                 pt2->offset = pt1->offset+o1;
 335                 pt3->offset = pt1->offset+o2;
 336
 337                 /* create video-dma2 page table */
 338                 ptr1 = pt1->cpu;
 339                 for(i = m1; i <= m2 ; i++, ptr2++) {
 340                         *ptr2 = ptr1[i];
 341                 }
 342                 fill = *(ptr2-1);
 343                 for(;i<1024;i++,ptr2++) {
 344                         *ptr2 = fill;
 345                 }
 346                 /* create video-dma3 page table */
 347                 ptr1 = pt1->cpu;
 348                 for(i = m2; i <= m3; i++,ptr3++) {
 349                         *ptr3 = ptr1[i];
 350                 }
 351                 fill = *(ptr3-1);
 352                 for(;i<1024;i++,ptr3++) {
 353                         *ptr3 = fill;
 354                 }
 355                 /* finally: finish up video-dma1 page table */
 356                 ptr1 = pt1->cpu+m1;
 357                 fill = pt1->cpu[m1];
 358                 for(i=m1;i<1024;i++,ptr1++) {
 359                         *ptr1 = fill;
 360                 }
 361 /*
 362                 ptr1 = pt1->cpu;
 363                 ptr2 = pt2->cpu;
 364                 ptr3 = pt3->cpu;
 365                 for(j=0;j<40;j++) {
 366                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
 367                 }
 368                 for(j=0;j<40;j++) {
 369                         printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
 370                 }
 371                 for(j=0;j<40;j++) {
 372                         printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
 373                 }
 374 */
 375         } else {
 376                 struct saa7146_pgtable *pt = &buf->pt[0];
 377                 return saa7146_pgtable_build_single(pci, pt, list, length);
 378         }
 379
 380         return 0;
 381 }
 382
 383
 384 /********************************************************************************/
 385 /* file operations */
 386
 387 static int video_begin(struct saa7146_fh *fh)
 388 {
 389         struct saa7146_dev *dev = fh->dev;
 390         struct saa7146_vv *vv = dev->vv_data;
 391         struct saa7146_format *fmt = NULL;
 392         unsigned int resource;
 393         int ret = 0, err = 0;
 394
 395         DEB_EE("dev:%p, fh:%p\n", dev, fh);
 396
 397         if ((vv->video_status & STATUS_CAPTURE) != 0) {
 398                 if (vv->video_fh == fh) {
 399                         DEB_S("already capturing\n");
 400                         return 0;
 401                 }
 402                 DEB_S("already capturing in another open\n");
 403                 return -EBUSY;
 404         }
 405
 406         if ((vv->video_status & STATUS_OVERLAY) != 0) {
 407                 DEB_S("warning: suspending overlay video for streaming capture\n");
 408                 vv->ov_suspend = vv->video_fh;
 409                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
 410                 if (0 != err) {
 411                         DEB_D("suspending video failed. aborting\n");
 412                         return err;
 413                 }
 414         }
 415
 416         fmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat);
 417         /* we need to have a valid format set here */
 418         BUG_ON(NULL == fmt);
 419
 420         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 421                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
 422         } else {
 423                 resource = RESOURCE_DMA1_HPS;
 424         }
 425
 426         ret = saa7146_res_get(fh, resource);
 427         if (0 == ret) {
 428                 DEB_S("cannot get capture resource %d\n", resource);
 429                 if (vv->ov_suspend != NULL) {
 430                         saa7146_start_preview(vv->ov_suspend);
 431                         vv->ov_suspend = NULL;
 432                 }
 433                 return -EBUSY;
 434         }
 435
 436         /* clear out beginning of streaming bit (rps register 0)*/
 437         saa7146_write(dev, MC2, MASK_27 );
 438
 439         /* enable rps0 irqs */
 440         SAA7146_IER_ENABLE(dev, MASK_27);
 441
 442         vv->video_fh = fh;
 443         vv->video_status = STATUS_CAPTURE;
 444
 445         return 0;
 446 }
 447
 448 static int video_end(struct saa7146_fh *fh, struct file *file)
 449 {
 450         struct saa7146_dev *dev = fh->dev;
 451         struct saa7146_vv *vv = dev->vv_data;
 452         struct saa7146_format *fmt = NULL;
 453         unsigned long flags;
 454         unsigned int resource;
 455         u32 dmas = 0;
 456         DEB_EE("dev:%p, fh:%p\n", dev, fh);
 457
 458         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
 459                 DEB_S("not capturing\n");
 460                 return 0;
 461         }
 462
 463         if (vv->video_fh != fh) {
 464                 DEB_S("capturing, but in another open\n");
 465                 return -EBUSY;
 466         }
 467
 468         fmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat);
 469         /* we need to have a valid format set here */
 470         BUG_ON(NULL == fmt);
 471
 472         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 473                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
 474                 dmas = MASK_22 | MASK_21 | MASK_20;
 475         } else {
 476                 resource = RESOURCE_DMA1_HPS;
 477                 dmas = MASK_22;
 478         }
 479         spin_lock_irqsave(&dev->slock,flags);
 480
 481         /* disable rps0  */
 482         saa7146_write(dev, MC1, MASK_28);
 483
 484         /* disable rps0 irqs */
 485         SAA7146_IER_DISABLE(dev, MASK_27);
 486
 487         /* shut down all used video dma transfers */
 488         saa7146_write(dev, MC1, dmas);
 489
 490         spin_unlock_irqrestore(&dev->slock, flags);
 491
 492         vv->video_fh = NULL;
 493         vv->video_status = 0;
 494
 495         saa7146_res_free(fh, resource);
 496
 497         if (vv->ov_suspend != NULL) {
 498                 saa7146_start_preview(vv->ov_suspend);
 499                 vv->ov_suspend = NULL;
 500         }
 501
 502         return 0;
 503 }
 504
 505 static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 506 {
 507         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 508
 509         strcpy((char *)cap->driver, "saa7146 v4l2");
 510         strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
 511         sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci));
 512         cap->version = SAA7146_VERSION_CODE;
 513         cap->capabilities =
 514                 V4L2_CAP_VIDEO_CAPTURE |
 515                 V4L2_CAP_VIDEO_OVERLAY |
 516                 V4L2_CAP_READWRITE |
 517                 V4L2_CAP_STREAMING;
 518         cap->capabilities |= dev->ext_vv_data->capabilities;
 519         return 0;
 520 }
 521
 522 static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
 523 {
 524         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 525         struct saa7146_vv *vv = dev->vv_data;
 526
 527         *fb = vv->ov_fb;
 528         fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
 529         return 0;
 530 }
 531
 532 static int vidioc_s_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
 533 {
 534         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 535         struct saa7146_vv *vv = dev->vv_data;
 536         struct saa7146_format *fmt;
 537
 538         DEB_EE("VIDIOC_S_FBUF\n");
 539
 540         if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
 541                 return -EPERM;
 542
 543         /* check args */
 544         fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat);
 545         if (NULL == fmt)
 546                 return -EINVAL;
 547
 548         /* planar formats are not allowed for overlay video, clipping and video dma would clash */
 549         if (fmt->flags & FORMAT_IS_PLANAR)
 550                 DEB_S("planar pixelformat '%4.4s' not allowed for overlay\n",
 551                       (char *)&fmt->pixelformat);
 552
 553         /* check if overlay is running */
 554         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 555                 if (vv->video_fh != fh) {
 556                         DEB_D("refusing to change framebuffer informations while overlay is active in another open\n");
 557                         return -EBUSY;
 558                 }
 559         }
 560
 561         /* ok, accept it */
 562         vv->ov_fb = *fb;
 563         vv->ov_fmt = fmt;
 564
 565         if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) {
 566                 vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8;
 567                 DEB_D("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline);
 568         }
 569         return 0;
 570 }
 571
 572 static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
 573 {
 574         if (f->index >= NUM_FORMATS)
 575                 return -EINVAL;
 576         strlcpy((char *)f->description, formats[f->index].name,
 577                         sizeof(f->description));
 578         f->pixelformat = formats[f->index].pixelformat;
 579         return 0;
 580 }
 581
 582 static int vidioc_queryctrl(struct file *file, void *fh, struct v4l2_queryctrl *c)
 583 {
 584         const struct v4l2_queryctrl *ctrl;
 585
 586         if ((c->id <  V4L2_CID_BASE ||
 587              c->id >= V4L2_CID_LASTP1) &&
 588             (c->id <  V4L2_CID_PRIVATE_BASE ||
 589              c->id >= V4L2_CID_PRIVATE_LASTP1))
 590                 return -EINVAL;
 591
 592         ctrl = ctrl_by_id(c->id);
 593         if (ctrl == NULL)
 594                 return -EINVAL;
 595
 596         DEB_EE("VIDIOC_QUERYCTRL: id:%d\n", c->id);
 597         *c = *ctrl;
 598         return 0;
 599 }
 600
 601 static int vidioc_g_ctrl(struct file *file, void *fh, struct v4l2_control *c)
 602 {
 603         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 604         struct saa7146_vv *vv = dev->vv_data;
 605         const struct v4l2_queryctrl *ctrl;
 606         u32 value = 0;
 607
 608         ctrl = ctrl_by_id(c->id);
 609         if (NULL == ctrl)
 610                 return -EINVAL;
 611         switch (c->id) {
 612         case V4L2_CID_BRIGHTNESS:
 613                 value = saa7146_read(dev, BCS_CTRL);
 614                 c->value = 0xff & (value >> 24);
 615                 DEB_D("V4L2_CID_BRIGHTNESS: %d\n", c->value);
 616                 break;
 617         case V4L2_CID_CONTRAST:
 618                 value = saa7146_read(dev, BCS_CTRL);
 619                 c->value = 0x7f & (value >> 16);
 620                 DEB_D("V4L2_CID_CONTRAST: %d\n", c->value);
 621                 break;
 622         case V4L2_CID_SATURATION:
 623                 value = saa7146_read(dev, BCS_CTRL);
 624                 c->value = 0x7f & (value >> 0);
 625                 DEB_D("V4L2_CID_SATURATION: %d\n", c->value);
 626                 break;
 627         case V4L2_CID_VFLIP:
 628                 c->value = vv->vflip;
 629                 DEB_D("V4L2_CID_VFLIP: %d\n", c->value);
 630                 break;
 631         case V4L2_CID_HFLIP:
 632                 c->value = vv->hflip;
 633                 DEB_D("V4L2_CID_HFLIP: %d\n", c->value);
 634                 break;
 635         default:
 636                 return -EINVAL;
 637         }
 638         return 0;
 639 }
 640
 641 static int vidioc_s_ctrl(struct file *file, void *fh, struct v4l2_control *c)
 642 {
 643         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 644         struct saa7146_vv *vv = dev->vv_data;
 645         const struct v4l2_queryctrl *ctrl;
 646
 647         ctrl = ctrl_by_id(c->id);
 648         if (NULL == ctrl) {
 649                 DEB_D("unknown control %d\n", c->id);
 650                 return -EINVAL;
 651         }
 652
 653         switch (ctrl->type) {
 654         case V4L2_CTRL_TYPE_BOOLEAN:
 655         case V4L2_CTRL_TYPE_MENU:
 656         case V4L2_CTRL_TYPE_INTEGER:
 657                 if (c->value < ctrl->minimum)
 658                         c->value = ctrl->minimum;
 659                 if (c->value > ctrl->maximum)
 660                         c->value = ctrl->maximum;
 661                 break;
 662         default:
 663                 /* nothing */;
 664         }
 665
 666         switch (c->id) {
 667         case V4L2_CID_BRIGHTNESS: {
 668                 u32 value = saa7146_read(dev, BCS_CTRL);
 669                 value &= 0x00ffffff;
 670                 value |= (c->value << 24);
 671                 saa7146_write(dev, BCS_CTRL, value);
 672                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 673                 break;
 674         }
 675         case V4L2_CID_CONTRAST: {
 676                 u32 value = saa7146_read(dev, BCS_CTRL);
 677                 value &= 0xff00ffff;
 678                 value |= (c->value << 16);
 679                 saa7146_write(dev, BCS_CTRL, value);
 680                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 681                 break;
 682         }
 683         case V4L2_CID_SATURATION: {
 684                 u32 value = saa7146_read(dev, BCS_CTRL);
 685                 value &= 0xffffff00;
 686                 value |= (c->value << 0);
 687                 saa7146_write(dev, BCS_CTRL, value);
 688                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 689                 break;
 690         }
 691         case V4L2_CID_HFLIP:
 692                 /* fixme: we can support changing VFLIP and HFLIP here... */
 693                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
 694                         DEB_D("V4L2_CID_HFLIP while active capture\n");
 695                         return -EBUSY;
 696                 }
 697                 vv->hflip = c->value;
 698                 break;
 699         case V4L2_CID_VFLIP:
 700                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
 701                         DEB_D("V4L2_CID_VFLIP while active capture\n");
 702                         return -EBUSY;
 703                 }
 704                 vv->vflip = c->value;
 705                 break;
 706         default:
 707                 return -EINVAL;
 708         }
 709
 710         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 711                 saa7146_stop_preview(fh);
 712                 saa7146_start_preview(fh);
 713         }
 714         return 0;
 715 }
 716
 717 static int vidioc_g_parm(struct file *file, void *fh,
 718                 struct v4l2_streamparm *parm)
 719 {
 720         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 721         struct saa7146_vv *vv = dev->vv_data;
 722
 723         parm->parm.capture.readbuffers = 1;
 724         v4l2_video_std_frame_period(vv->standard->id,
 725                                     &parm->parm.capture.timeperframe);
 726         return 0;
 727 }
 728
 729 static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
 730 {
 731         f->fmt.pix = ((struct saa7146_fh *)fh)->video_fmt;
 732         return 0;
 733 }
 734
 735 static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
 736 {
 737         f->fmt.win = ((struct saa7146_fh *)fh)->ov.win;
 738         return 0;
 739 }
 740
 741 static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f)
 742 {
 743         f->fmt.vbi = ((struct saa7146_fh *)fh)->vbi_fmt;
 744         return 0;
 745 }
 746
 747 static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
 748 {
 749         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 750         struct saa7146_vv *vv = dev->vv_data;
 751         struct saa7146_format *fmt;
 752         enum v4l2_field field;
 753         int maxw, maxh;
 754         int calc_bpl;
 755
 756         DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
 757
 758         fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat);
 759         if (NULL == fmt)
 760                 return -EINVAL;
 761
 762         field = f->fmt.pix.field;
 763         maxw  = vv->standard->h_max_out;
 764         maxh  = vv->standard->v_max_out;
 765
 766         if (V4L2_FIELD_ANY == field) {
 767                 field = (f->fmt.pix.height > maxh / 2)
 768                         ? V4L2_FIELD_INTERLACED
 769                         : V4L2_FIELD_BOTTOM;
 770         }
 771         switch (field) {
 772         case V4L2_FIELD_ALTERNATE:
 773                 vv->last_field = V4L2_FIELD_TOP;
 774                 maxh = maxh / 2;
 775                 break;
 776         case V4L2_FIELD_TOP:
 777         case V4L2_FIELD_BOTTOM:
 778                 vv->last_field = V4L2_FIELD_INTERLACED;
 779                 maxh = maxh / 2;
 780                 break;
 781         case V4L2_FIELD_INTERLACED:
 782                 vv->last_field = V4L2_FIELD_INTERLACED;
 783                 break;
 784         default:
 785                 DEB_D("no known field mode '%d'\n", field);
 786                 return -EINVAL;
 787         }
 788
 789         f->fmt.pix.field = field;
 790         if (f->fmt.pix.width > maxw)
 791                 f->fmt.pix.width = maxw;
 792         if (f->fmt.pix.height > maxh)
 793                 f->fmt.pix.height = maxh;
 794
 795         calc_bpl = (f->fmt.pix.width * fmt->depth) / 8;
 796
 797         if (f->fmt.pix.bytesperline < calc_bpl)
 798                 f->fmt.pix.bytesperline = calc_bpl;
 799
 800         if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */
 801                 f->fmt.pix.bytesperline = calc_bpl;
 802
 803         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
 804         DEB_D("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n",
 805               f->fmt.pix.width, f->fmt.pix.height,
 806               f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
 807
 808         return 0;
 809 }
 810
 811
 812 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
 813 {
 814         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 815         struct saa7146_vv *vv = dev->vv_data;
 816         struct v4l2_window *win = &f->fmt.win;
 817         enum v4l2_field field;
 818         int maxw, maxh;
 819
 820         DEB_EE("dev:%p\n", dev);
 821
 822         if (NULL == vv->ov_fb.base) {
 823                 DEB_D("no fb base set\n");
 824                 return -EINVAL;
 825         }
 826         if (NULL == vv->ov_fmt) {
 827                 DEB_D("no fb fmt set\n");
 828                 return -EINVAL;
 829         }
 830         if (win->w.width < 48 || win->w.height < 32) {
 831                 DEB_D("min width/height. (%d,%d)\n",
 832                       win->w.width, win->w.height);
 833                 return -EINVAL;
 834         }
 835         if (win->clipcount > 16) {
 836                 DEB_D("clipcount too big\n");
 837                 return -EINVAL;
 838         }
 839
 840         field = win->field;
 841         maxw  = vv->standard->h_max_out;
 842         maxh  = vv->standard->v_max_out;
 843
 844         if (V4L2_FIELD_ANY == field) {
 845                 field = (win->w.height > maxh / 2)
 846                         ? V4L2_FIELD_INTERLACED
 847                         : V4L2_FIELD_TOP;
 848                 }
 849         switch (field) {
 850         case V4L2_FIELD_TOP:
 851         case V4L2_FIELD_BOTTOM:
 852         case V4L2_FIELD_ALTERNATE:
 853                 maxh = maxh / 2;
 854                 break;
 855         case V4L2_FIELD_INTERLACED:
 856                 break;
 857         default:
 858                 DEB_D("no known field mode '%d'\n", field);
 859                 return -EINVAL;
 860         }
 861
 862         win->field = field;
 863         if (win->w.width > maxw)
 864                 win->w.width = maxw;
 865         if (win->w.height > maxh)
 866                 win->w.height = maxh;
 867
 868         return 0;
 869 }
 870
 871 static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f)
 872 {
 873         struct saa7146_fh *fh = __fh;
 874         struct saa7146_dev *dev = fh->dev;
 875         struct saa7146_vv *vv = dev->vv_data;
 876         int err;
 877
 878         DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
 879         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 880                 DEB_EE("streaming capture is active\n");
 881                 return -EBUSY;
 882         }
 883         err = vidioc_try_fmt_vid_cap(file, fh, f);
 884         if (0 != err)
 885                 return err;
 886         fh->video_fmt = f->fmt.pix;
 887         DEB_EE("set to pixelformat '%4.4s'\n",
 888                (char *)&fh->video_fmt.pixelformat);
 889         return 0;
 890 }
 891
 892 static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f)
 893 {
 894         struct saa7146_fh *fh = __fh;
 895         struct saa7146_dev *dev = fh->dev;
 896         struct saa7146_vv *vv = dev->vv_data;
 897         int err;
 898
 899         DEB_EE("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh);
 900         err = vidioc_try_fmt_vid_overlay(file, fh, f);
 901         if (0 != err)
 902                 return err;
 903         fh->ov.win    = f->fmt.win;
 904         fh->ov.nclips = f->fmt.win.clipcount;
 905         if (fh->ov.nclips > 16)
 906                 fh->ov.nclips = 16;
 907         if (copy_from_user(fh->ov.clips, f->fmt.win.clips,
 908                                 sizeof(struct v4l2_clip) * fh->ov.nclips)) {
 909                 return -EFAULT;
 910         }
 911
 912         /* fh->ov.fh is used to indicate that we have valid overlay informations, too */
 913         fh->ov.fh = fh;
 914
 915         /* check if our current overlay is active */
 916         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 917                 saa7146_stop_preview(fh);
 918                 saa7146_start_preview(fh);
 919         }
 920         return 0;
 921 }
 922
 923 static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm)
 924 {
 925         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 926         struct saa7146_vv *vv = dev->vv_data;
 927
 928         *norm = vv->standard->id;
 929         return 0;
 930 }
 931
 932         /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
 933            PAL / NTSC / SECAM. if your hardware does not (or does more)
 934            -- override this function in your extension */
 935 /*
 936         case VIDIOC_ENUMSTD:
 937         {
 938                 struct v4l2_standard *e = arg;
 939                 if (e->index < 0 )
 940                         return -EINVAL;
 941                 if( e->index < dev->ext_vv_data->num_stds ) {
 942                         DEB_EE("VIDIOC_ENUMSTD: index:%d\n", e->index);
 943                         v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
 944                         return 0;
 945                 }
 946                 return -EINVAL;
 947         }
 948         */
 949
 950 static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id *id)
 951 {
 952         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 953         struct saa7146_vv *vv = dev->vv_data;
 954         int found = 0;
 955         int err, i;
 956
 957         DEB_EE("VIDIOC_S_STD\n");
 958
 959         if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
 960                 DEB_D("cannot change video standard while streaming capture is active\n");
 961                 return -EBUSY;
 962         }
 963
 964         if ((vv->video_status & STATUS_OVERLAY) != 0) {
 965                 vv->ov_suspend = vv->video_fh;
 966                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
 967                 if (0 != err) {
 968                         DEB_D("suspending video failed. aborting\n");
 969                         return err;
 970                 }
 971         }
 972
 973         for (i = 0; i < dev->ext_vv_data->num_stds; i++)
 974                 if (*id & dev->ext_vv_data->stds[i].id)
 975                         break;
 976         if (i != dev->ext_vv_data->num_stds) {
 977                 vv->standard = &dev->ext_vv_data->stds[i];
 978                 if (NULL != dev->ext_vv_data->std_callback)
 979                         dev->ext_vv_data->std_callback(dev, vv->standard);
 980                 found = 1;
 981         }
 982
 983         if (vv->ov_suspend != NULL) {
 984                 saa7146_start_preview(vv->ov_suspend);
 985                 vv->ov_suspend = NULL;
 986         }
 987
 988         if (!found) {
 989                 DEB_EE("VIDIOC_S_STD: standard not found\n");
 990                 return -EINVAL;
 991         }
 992
 993         DEB_EE("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name);
 994         return 0;
 995 }
 996
 997 static int vidioc_overlay(struct file *file, void *fh, unsigned int on)
 998 {
 999         int err;
1000
1001         DEB_D("VIDIOC_OVERLAY on:%d\n", on);
1002         if (on)
1003                 err = saa7146_start_preview(fh);
1004         else
1005                 err = saa7146_stop_preview(fh);
1006         return err;
1007 }
1008
1009 static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b)
1010 {
1011         struct saa7146_fh *fh = __fh;
1012
1013         if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1014                 return videobuf_reqbufs(&fh->video_q, b);
1015         if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1016                 return videobuf_reqbufs(&fh->vbi_q, b);
1017         return -EINVAL;
1018 }
1019
1020 static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1021 {
1022         struct saa7146_fh *fh = __fh;
1023
1024         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1025                 return videobuf_querybuf(&fh->video_q, buf);
1026         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1027                 return videobuf_querybuf(&fh->vbi_q, buf);
1028         return -EINVAL;
1029 }
1030
1031 static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1032 {
1033         struct saa7146_fh *fh = __fh;
1034
1035         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1036                 return videobuf_qbuf(&fh->video_q, buf);
1037         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1038                 return videobuf_qbuf(&fh->vbi_q, buf);
1039         return -EINVAL;
1040 }
1041
1042 static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1043 {
1044         struct saa7146_fh *fh = __fh;
1045
1046         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1047                 return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK);
1048         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1049                 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK);
1050         return -EINVAL;
1051 }
1052
1053 static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
1054 {
1055         struct saa7146_fh *fh = __fh;
1056         int err;
1057
1058         DEB_D("VIDIOC_STREAMON, type:%d\n", type);
1059
1060         err = video_begin(fh);
1061         if (err)
1062                 return err;
1063         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1064                 return videobuf_streamon(&fh->video_q);
1065         if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1066                 return videobuf_streamon(&fh->vbi_q);
1067         return -EINVAL;
1068 }
1069
1070 static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
1071 {
1072         struct saa7146_fh *fh = __fh;
1073         struct saa7146_dev *dev = fh->dev;
1074         struct saa7146_vv *vv = dev->vv_data;
1075         int err;
1076
1077         DEB_D("VIDIOC_STREAMOFF, type:%d\n", type);
1078
1079         /* ugly: we need to copy some checks from video_end(),
1080            because videobuf_streamoff() relies on the capture running.
1081            check and fix this */
1082         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
1083                 DEB_S("not capturing\n");
1084                 return 0;
1085         }
1086
1087         if (vv->video_fh != fh) {
1088                 DEB_S("capturing, but in another open\n");
1089                 return -EBUSY;
1090         }
1091
1092         err = -EINVAL;
1093         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1094                 err = videobuf_streamoff(&fh->video_q);
1095         else if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1096                 err = videobuf_streamoff(&fh->vbi_q);
1097         if (0 != err) {
1098                 DEB_D("warning: videobuf_streamoff() failed\n");
1099                 video_end(fh, file);
1100         } else {
1101                 err = video_end(fh, file);
1102         }
1103         return err;
1104 }
1105
1106 static int vidioc_g_chip_ident(struct file *file, void *__fh,
1107                 struct v4l2_dbg_chip_ident *chip)
1108 {
1109         struct saa7146_fh *fh = __fh;
1110         struct saa7146_dev *dev = fh->dev;
1111
1112         chip->ident = V4L2_IDENT_NONE;
1113         chip->revision = 0;
1114         if (chip->match.type == V4L2_CHIP_MATCH_HOST && !chip->match.addr) {
1115                 chip->ident = V4L2_IDENT_SAA7146;
1116                 return 0;
1117         }
1118         return v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1119                         core, g_chip_ident, chip);
1120 }
1121
1122 const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
1123         .vidioc_querycap             = vidioc_querycap,
1124         .vidioc_enum_fmt_vid_cap     = vidioc_enum_fmt_vid_cap,
1125         .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap,
1126         .vidioc_g_fmt_vid_cap        = vidioc_g_fmt_vid_cap,
1127         .vidioc_try_fmt_vid_cap      = vidioc_try_fmt_vid_cap,
1128         .vidioc_s_fmt_vid_cap        = vidioc_s_fmt_vid_cap,
1129         .vidioc_g_fmt_vid_overlay    = vidioc_g_fmt_vid_overlay,
1130         .vidioc_try_fmt_vid_overlay  = vidioc_try_fmt_vid_overlay,
1131         .vidioc_s_fmt_vid_overlay    = vidioc_s_fmt_vid_overlay,
1132         .vidioc_g_fmt_vbi_cap        = vidioc_g_fmt_vbi_cap,
1133         .vidioc_g_chip_ident         = vidioc_g_chip_ident,
1134
1135         .vidioc_overlay              = vidioc_overlay,
1136         .vidioc_g_fbuf               = vidioc_g_fbuf,
1137         .vidioc_s_fbuf               = vidioc_s_fbuf,
1138         .vidioc_reqbufs              = vidioc_reqbufs,
1139         .vidioc_querybuf             = vidioc_querybuf,
1140         .vidioc_qbuf                 = vidioc_qbuf,
1141         .vidioc_dqbuf                = vidioc_dqbuf,
1142         .vidioc_g_std                = vidioc_g_std,
1143         .vidioc_s_std                = vidioc_s_std,
1144         .vidioc_queryctrl            = vidioc_queryctrl,
1145         .vidioc_g_ctrl               = vidioc_g_ctrl,
1146         .vidioc_s_ctrl               = vidioc_s_ctrl,
1147         .vidioc_streamon             = vidioc_streamon,
1148         .vidioc_streamoff            = vidioc_streamoff,
1149         .vidioc_g_parm               = vidioc_g_parm,
1150 };
1151
1152 /*********************************************************************************/
1153 /* buffer handling functions                                                  */
1154
1155 static int buffer_activate (struct saa7146_dev *dev,
1156                      struct saa7146_buf *buf,
1157                      struct saa7146_buf *next)
1158 {
1159         struct saa7146_vv *vv = dev->vv_data;
1160
1161         buf->vb.state = VIDEOBUF_ACTIVE;
1162         saa7146_set_capture(dev,buf,next);
1163
1164         mod_timer(&vv->video_q.timeout, jiffies+BUFFER_TIMEOUT);
1165         return 0;
1166 }
1167
1168 static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf)
1169 {
1170         saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1171         saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1172         saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1173 }
1174
1175 static int buffer_prepare(struct videobuf_queue *q,
1176                           struct videobuf_buffer *vb, enum v4l2_field field)
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_vv *vv = dev->vv_data;
1182         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1183         int size,err = 0;
1184
1185         DEB_CAP("vbuf:%p\n", vb);
1186
1187         /* sanity checks */
1188         if (fh->video_fmt.width  < 48 ||
1189             fh->video_fmt.height < 32 ||
1190             fh->video_fmt.width  > vv->standard->h_max_out ||
1191             fh->video_fmt.height > vv->standard->v_max_out) {
1192                 DEB_D("w (%d) / h (%d) out of bounds\n",
1193                       fh->video_fmt.width, fh->video_fmt.height);
1194                 return -EINVAL;
1195         }
1196
1197         size = fh->video_fmt.sizeimage;
1198         if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1199                 DEB_D("size mismatch\n");
1200                 return -EINVAL;
1201         }
1202
1203         DEB_CAP("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1204                 fh->video_fmt.width, fh->video_fmt.height,
1205                 size, v4l2_field_names[fh->video_fmt.field]);
1206         if (buf->vb.width  != fh->video_fmt.width  ||
1207             buf->vb.bytesperline != fh->video_fmt.bytesperline ||
1208             buf->vb.height != fh->video_fmt.height ||
1209             buf->vb.size   != size ||
1210             buf->vb.field  != field      ||
1211             buf->vb.field  != fh->video_fmt.field  ||
1212             buf->fmt       != &fh->video_fmt) {
1213                 saa7146_dma_free(dev,q,buf);
1214         }
1215
1216         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1217                 struct saa7146_format *sfmt;
1218
1219                 buf->vb.bytesperline  = fh->video_fmt.bytesperline;
1220                 buf->vb.width  = fh->video_fmt.width;
1221                 buf->vb.height = fh->video_fmt.height;
1222                 buf->vb.size   = size;
1223                 buf->vb.field  = field;
1224                 buf->fmt       = &fh->video_fmt;
1225                 buf->vb.field  = fh->video_fmt.field;
1226
1227                 sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
1228
1229                 release_all_pagetables(dev, buf);
1230                 if( 0 != IS_PLANAR(sfmt->trans)) {
1231                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1232                         saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1233                         saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1234                 } else {
1235                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1236                 }
1237
1238                 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1239                 if (err)
1240                         goto oops;
1241                 err = saa7146_pgtable_build(dev,buf);
1242                 if (err)
1243                         goto oops;
1244         }
1245         buf->vb.state = VIDEOBUF_PREPARED;
1246         buf->activate = buffer_activate;
1247
1248         return 0;
1249
1250  oops:
1251         DEB_D("error out\n");
1252         saa7146_dma_free(dev,q,buf);
1253
1254         return err;
1255 }
1256
1257 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1258 {
1259         struct file *file = q->priv_data;
1260         struct saa7146_fh *fh = file->private_data;
1261
1262         if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1263                 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1264
1265         *size = fh->video_fmt.sizeimage;
1266
1267         /* check if we exceed the "max_memory" parameter */
1268         if( (*count * *size) > (max_memory*1048576) ) {
1269                 *count = (max_memory*1048576) / *size;
1270         }
1271
1272         DEB_CAP("%d buffers, %d bytes each\n", *count, *size);
1273
1274         return 0;
1275 }
1276
1277 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1278 {
1279         struct file *file = q->priv_data;
1280         struct saa7146_fh *fh = file->private_data;
1281         struct saa7146_dev *dev = fh->dev;
1282         struct saa7146_vv *vv = dev->vv_data;
1283         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1284
1285         DEB_CAP("vbuf:%p\n", vb);
1286         saa7146_buffer_queue(fh->dev,&vv->video_q,buf);
1287 }
1288
1289 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1290 {
1291         struct file *file = q->priv_data;
1292         struct saa7146_fh *fh = file->private_data;
1293         struct saa7146_dev *dev = fh->dev;
1294         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1295
1296         DEB_CAP("vbuf:%p\n", vb);
1297
1298         saa7146_dma_free(dev,q,buf);
1299
1300         release_all_pagetables(dev, buf);
1301 }
1302
1303 static struct videobuf_queue_ops video_qops = {
1304         .buf_setup    = buffer_setup,
1305         .buf_prepare  = buffer_prepare,
1306         .buf_queue    = buffer_queue,
1307         .buf_release  = buffer_release,
1308 };
1309
1310 /********************************************************************************/
1311 /* file operations */
1312
1313 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1314 {
1315         INIT_LIST_HEAD(&vv->video_q.queue);
1316
1317         init_timer(&vv->video_q.timeout);
1318         vv->video_q.timeout.function = saa7146_buffer_timeout;
1319         vv->video_q.timeout.data     = (unsigned long)(&vv->video_q);
1320         vv->video_q.dev              = dev;
1321
1322         /* set some default values */
1323         vv->standard = &dev->ext_vv_data->stds[0];
1324
1325         /* FIXME: what's this? */
1326         vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1327         vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1328 }
1329
1330
1331 static int video_open(struct saa7146_dev *dev, struct file *file)
1332 {
1333         struct saa7146_fh *fh = file->private_data;
1334         struct saa7146_format *sfmt;
1335
1336         fh->video_fmt.width = 384;
1337         fh->video_fmt.height = 288;
1338         fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24;
1339         fh->video_fmt.bytesperline = 0;
1340         fh->video_fmt.field = V4L2_FIELD_ANY;
1341         sfmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat);
1342         fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8;
1343
1344         videobuf_queue_sg_init(&fh->video_q, &video_qops,
1345                             &dev->pci->dev, &dev->slock,
1346                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
1347                             V4L2_FIELD_INTERLACED,
1348                             sizeof(struct saa7146_buf),
1349                             file, &dev->v4l2_lock);
1350
1351         return 0;
1352 }
1353
1354
1355 static void video_close(struct saa7146_dev *dev, struct file *file)
1356 {
1357         struct saa7146_fh *fh = file->private_data;
1358         struct saa7146_vv *vv = dev->vv_data;
1359         struct videobuf_queue *q = &fh->video_q;
1360
1361         if (IS_CAPTURE_ACTIVE(fh) != 0)
1362                 video_end(fh, file);
1363         else if (IS_OVERLAY_ACTIVE(fh) != 0)
1364                 saa7146_stop_preview(fh);
1365
1366         videobuf_stop(q);
1367         /* hmm, why is this function declared void? */
1368 }
1369
1370
1371 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1372 {
1373         struct saa7146_vv *vv = dev->vv_data;
1374         struct saa7146_dmaqueue *q = &vv->video_q;
1375
1376         spin_lock(&dev->slock);
1377         DEB_CAP("called\n");
1378
1379         /* only finish the buffer if we have one... */
1380         if( NULL != q->curr ) {
1381                 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1382         }
1383         saa7146_buffer_next(dev,q,0);
1384
1385         spin_unlock(&dev->slock);
1386 }
1387
1388 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1389 {
1390         struct saa7146_fh *fh = file->private_data;
1391         struct saa7146_dev *dev = fh->dev;
1392         struct saa7146_vv *vv = dev->vv_data;
1393         ssize_t ret = 0;
1394
1395         DEB_EE("called\n");
1396
1397         if ((vv->video_status & STATUS_CAPTURE) != 0) {
1398                 /* fixme: should we allow read() captures while streaming capture? */
1399                 if (vv->video_fh == fh) {
1400                         DEB_S("already capturing\n");
1401                         return -EBUSY;
1402                 }
1403                 DEB_S("already capturing in another open\n");
1404                 return -EBUSY;
1405         }
1406
1407         ret = video_begin(fh);
1408         if( 0 != ret) {
1409                 goto out;
1410         }
1411
1412         ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1413                                 file->f_flags & O_NONBLOCK);
1414         if (ret != 0) {
1415                 video_end(fh, file);
1416         } else {
1417                 ret = video_end(fh, file);
1418         }
1419 out:
1420         /* restart overlay if it was active before */
1421         if (vv->ov_suspend != NULL) {
1422                 saa7146_start_preview(vv->ov_suspend);
1423                 vv->ov_suspend = NULL;
1424         }
1425
1426         return ret;
1427 }
1428
1429 struct saa7146_use_ops saa7146_video_uops = {
1430         .init = video_init,
1431         .open = video_open,
1432         .release = video_close,
1433         .irq_done = video_irq_done,
1434         .read = video_read,
1435 };