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
   6 static int max_memory = 32;
   7
   8 module_param(max_memory, int, 0644);
   9 MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)");
  10
  11 #define IS_CAPTURE_ACTIVE(fh) \
  12         (((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh))
  13
  14 #define IS_OVERLAY_ACTIVE(fh) \
  15         (((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh))
  16
  17 /* format descriptions for capture and preview */
  18 static struct saa7146_format formats[] = {
  19         {
  20                 .name           = "RGB-8 (3-3-2)",
  21                 .pixelformat    = V4L2_PIX_FMT_RGB332,
  22                 .trans          = RGB08_COMPOSED,
  23                 .depth          = 8,
  24                 .flags          = 0,
  25         }, {
  26                 .name           = "RGB-16 (5/B-6/G-5/R)",
  27                 .pixelformat    = V4L2_PIX_FMT_RGB565,
  28                 .trans          = RGB16_COMPOSED,
  29                 .depth          = 16,
  30                 .flags          = 0,
  31         }, {
  32                 .name           = "RGB-24 (B-G-R)",
  33                 .pixelformat    = V4L2_PIX_FMT_BGR24,
  34                 .trans          = RGB24_COMPOSED,
  35                 .depth          = 24,
  36                 .flags          = 0,
  37         }, {
  38                 .name           = "RGB-32 (B-G-R)",
  39                 .pixelformat    = V4L2_PIX_FMT_BGR32,
  40                 .trans          = RGB32_COMPOSED,
  41                 .depth          = 32,
  42                 .flags          = 0,
  43         }, {
  44                 .name           = "RGB-32 (R-G-B)",
  45                 .pixelformat    = V4L2_PIX_FMT_RGB32,
  46                 .trans          = RGB32_COMPOSED,
  47                 .depth          = 32,
  48                 .flags          = 0,
  49                 .swap           = 0x2,
  50         }, {
  51                 .name           = "Greyscale-8",
  52                 .pixelformat    = V4L2_PIX_FMT_GREY,
  53                 .trans          = Y8,
  54                 .depth          = 8,
  55                 .flags          = 0,
  56         }, {
  57                 .name           = "YUV 4:2:2 planar (Y-Cb-Cr)",
  58                 .pixelformat    = V4L2_PIX_FMT_YUV422P,
  59                 .trans          = YUV422_DECOMPOSED,
  60                 .depth          = 16,
  61                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
  62         }, {
  63                 .name           = "YVU 4:2:0 planar (Y-Cb-Cr)",
  64                 .pixelformat    = V4L2_PIX_FMT_YVU420,
  65                 .trans          = YUV420_DECOMPOSED,
  66                 .depth          = 12,
  67                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
  68         }, {
  69                 .name           = "YUV 4:2:0 planar (Y-Cb-Cr)",
  70                 .pixelformat    = V4L2_PIX_FMT_YUV420,
  71                 .trans          = YUV420_DECOMPOSED,
  72                 .depth          = 12,
  73                 .flags          = FORMAT_IS_PLANAR,
  74         }, {
  75                 .name           = "YUV 4:2:2 (U-Y-V-Y)",
  76                 .pixelformat    = V4L2_PIX_FMT_UYVY,
  77                 .trans          = YUV422_COMPOSED,
  78                 .depth          = 16,
  79                 .flags          = 0,
  80         }
  81 };
  82
  83 /* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps.
  84    due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped
  85    (like V4L2_PIX_FMT_YUYV) ... 8-( */
  86
  87 static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
  88
  89 struct saa7146_format* saa7146_format_by_fourcc(struct saa7146_dev *dev, int fourcc)
  90 {
  91         int i, j = NUM_FORMATS;
  92
  93         for (i = 0; i < j; i++) {
  94                 if (formats[i].pixelformat == fourcc) {
  95                         return formats+i;
  96                 }
  97         }
  98
  99         DEB_D("unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
 100         return NULL;
 101 }
 102
 103 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f);
 104
 105 int saa7146_start_preview(struct saa7146_fh *fh)
 106 {
 107         struct saa7146_dev *dev = fh->dev;
 108         struct saa7146_vv *vv = dev->vv_data;
 109         struct v4l2_format fmt;
 110         int ret = 0, err = 0;
 111
 112         DEB_EE("dev:%p, fh:%p\n", dev, fh);
 113
 114         /* check if we have overlay informations */
 115         if( NULL == fh->ov.fh ) {
 116                 DEB_D("no overlay data available. try S_FMT first.\n");
 117                 return -EAGAIN;
 118         }
 119
 120         /* check if streaming capture is running */
 121         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 122                 DEB_D("streaming capture is active\n");
 123                 return -EBUSY;
 124         }
 125
 126         /* check if overlay is running */
 127         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 128                 if (vv->video_fh == fh) {
 129                         DEB_D("overlay is already active\n");
 130                         return 0;
 131                 }
 132                 DEB_D("overlay is already active in another open\n");
 133                 return -EBUSY;
 134         }
 135
 136         if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
 137                 DEB_D("cannot get necessary overlay resources\n");
 138                 return -EBUSY;
 139         }
 140
 141         fmt.fmt.win = fh->ov.win;
 142         err = vidioc_try_fmt_vid_overlay(NULL, fh, &fmt);
 143         if (0 != err) {
 144                 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 145                 return -EBUSY;
 146         }
 147         fh->ov.win = fmt.fmt.win;
 148         vv->ov_data = &fh->ov;
 149
 150         DEB_D("%dx%d+%d+%d %s field=%s\n",
 151               fh->ov.win.w.width, fh->ov.win.w.height,
 152               fh->ov.win.w.left, fh->ov.win.w.top,
 153               vv->ov_fmt->name, v4l2_field_names[fh->ov.win.field]);
 154
 155         if (0 != (ret = saa7146_enable_overlay(fh))) {
 156                 DEB_D("enabling overlay failed: %d\n", ret);
 157                 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 158                 return ret;
 159         }
 160
 161         vv->video_status = STATUS_OVERLAY;
 162         vv->video_fh = fh;
 163
 164         return 0;
 165 }
 166 EXPORT_SYMBOL_GPL(saa7146_start_preview);
 167
 168 int saa7146_stop_preview(struct saa7146_fh *fh)
 169 {
 170         struct saa7146_dev *dev = fh->dev;
 171         struct saa7146_vv *vv = dev->vv_data;
 172
 173         DEB_EE("dev:%p, fh:%p\n", dev, fh);
 174
 175         /* check if streaming capture is running */
 176         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 177                 DEB_D("streaming capture is active\n");
 178                 return -EBUSY;
 179         }
 180
 181         /* check if overlay is running at all */
 182         if ((vv->video_status & STATUS_OVERLAY) == 0) {
 183                 DEB_D("no active overlay\n");
 184                 return 0;
 185         }
 186
 187         if (vv->video_fh != fh) {
 188                 DEB_D("overlay is active, but in another open\n");
 189                 return -EBUSY;
 190         }
 191
 192         vv->video_status = 0;
 193         vv->video_fh = NULL;
 194
 195         saa7146_disable_overlay(fh);
 196
 197         saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
 198
 199         return 0;
 200 }
 201 EXPORT_SYMBOL_GPL(saa7146_stop_preview);
 202
 203 /********************************************************************************/
 204 /* device controls */
 205
 206 static struct v4l2_queryctrl controls[] = {
 207         {
 208                 .id             = V4L2_CID_BRIGHTNESS,
 209                 .name           = "Brightness",
 210                 .minimum        = 0,
 211                 .maximum        = 255,
 212                 .step           = 1,
 213                 .default_value  = 128,
 214                 .type           = V4L2_CTRL_TYPE_INTEGER,
 215                 .flags          = V4L2_CTRL_FLAG_SLIDER,
 216         },{
 217                 .id             = V4L2_CID_CONTRAST,
 218                 .name           = "Contrast",
 219                 .minimum        = 0,
 220                 .maximum        = 127,
 221                 .step           = 1,
 222                 .default_value  = 64,
 223                 .type           = V4L2_CTRL_TYPE_INTEGER,
 224                 .flags          = V4L2_CTRL_FLAG_SLIDER,
 225         },{
 226                 .id             = V4L2_CID_SATURATION,
 227                 .name           = "Saturation",
 228                 .minimum        = 0,
 229                 .maximum        = 127,
 230                 .step           = 1,
 231                 .default_value  = 64,
 232                 .type           = V4L2_CTRL_TYPE_INTEGER,
 233                 .flags          = V4L2_CTRL_FLAG_SLIDER,
 234         },{
 235                 .id             = V4L2_CID_VFLIP,
 236                 .name           = "Vertical Flip",
 237                 .minimum        = 0,
 238                 .maximum        = 1,
 239                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
 240         },{
 241                 .id             = V4L2_CID_HFLIP,
 242                 .name           = "Horizontal Flip",
 243                 .minimum        = 0,
 244                 .maximum        = 1,
 245                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
 246         },
 247 };
 248 static int NUM_CONTROLS = sizeof(controls)/sizeof(struct v4l2_queryctrl);
 249
 250 #define V4L2_CID_PRIVATE_LASTP1      (V4L2_CID_PRIVATE_BASE + 0)
 251
 252 static struct v4l2_queryctrl* ctrl_by_id(int id)
 253 {
 254         int i;
 255
 256         for (i = 0; i < NUM_CONTROLS; i++)
 257                 if (controls[i].id == id)
 258                         return controls+i;
 259         return NULL;
 260 }
 261
 262 /********************************************************************************/
 263 /* common pagetable functions */
 264
 265 static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
 266 {
 267         struct pci_dev *pci = dev->pci;
 268         struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
 269         struct scatterlist *list = dma->sglist;
 270         int length = dma->sglen;
 271         struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
 272
 273         DEB_EE("dev:%p, buf:%p, sg_len:%d\n", dev, buf, length);
 274
 275         if( 0 != IS_PLANAR(sfmt->trans)) {
 276                 struct saa7146_pgtable *pt1 = &buf->pt[0];
 277                 struct saa7146_pgtable *pt2 = &buf->pt[1];
 278                 struct saa7146_pgtable *pt3 = &buf->pt[2];
 279                 __le32  *ptr1, *ptr2, *ptr3;
 280                 __le32 fill;
 281
 282                 int size = buf->fmt->width*buf->fmt->height;
 283                 int i,p,m1,m2,m3,o1,o2;
 284
 285                 switch( sfmt->depth ) {
 286                         case 12: {
 287                                 /* create some offsets inside the page table */
 288                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
 289                                 m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
 290                                 m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
 291                                 o1 = size%PAGE_SIZE;
 292                                 o2 = (size+(size/4))%PAGE_SIZE;
 293                                 DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",
 294                                         size, m1, m2, m3, o1, o2);
 295                                 break;
 296                         }
 297                         case 16: {
 298                                 /* create some offsets inside the page table */
 299                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
 300                                 m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
 301                                 m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
 302                                 o1 = size%PAGE_SIZE;
 303                                 o2 = (size+(size/2))%PAGE_SIZE;
 304                                 DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",
 305                                         size, m1, m2, m3, o1, o2);
 306                                 break;
 307                         }
 308                         default: {
 309                                 return -1;
 310                         }
 311                 }
 312
 313                 ptr1 = pt1->cpu;
 314                 ptr2 = pt2->cpu;
 315                 ptr3 = pt3->cpu;
 316
 317                 /* walk all pages, copy all page addresses to ptr1 */
 318                 for (i = 0; i < length; i++, list++) {
 319                         for (p = 0; p * 4096 < list->length; p++, ptr1++) {
 320                                 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
 321                         }
 322                 }
 323 /*
 324                 ptr1 = pt1->cpu;
 325                 for(j=0;j<40;j++) {
 326                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
 327                 }
 328 */
 329
 330                 /* if we have a user buffer, the first page may not be
 331                    aligned to a page boundary. */
 332                 pt1->offset = dma->sglist->offset;
 333                 pt2->offset = pt1->offset+o1;
 334                 pt3->offset = pt1->offset+o2;
 335
 336                 /* create video-dma2 page table */
 337                 ptr1 = pt1->cpu;
 338                 for(i = m1; i <= m2 ; i++, ptr2++) {
 339                         *ptr2 = ptr1[i];
 340                 }
 341                 fill = *(ptr2-1);
 342                 for(;i<1024;i++,ptr2++) {
 343                         *ptr2 = fill;
 344                 }
 345                 /* create video-dma3 page table */
 346                 ptr1 = pt1->cpu;
 347                 for(i = m2; i <= m3; i++,ptr3++) {
 348                         *ptr3 = ptr1[i];
 349                 }
 350                 fill = *(ptr3-1);
 351                 for(;i<1024;i++,ptr3++) {
 352                         *ptr3 = fill;
 353                 }
 354                 /* finally: finish up video-dma1 page table */
 355                 ptr1 = pt1->cpu+m1;
 356                 fill = pt1->cpu[m1];
 357                 for(i=m1;i<1024;i++,ptr1++) {
 358                         *ptr1 = fill;
 359                 }
 360 /*
 361                 ptr1 = pt1->cpu;
 362                 ptr2 = pt2->cpu;
 363                 ptr3 = pt3->cpu;
 364                 for(j=0;j<40;j++) {
 365                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
 366                 }
 367                 for(j=0;j<40;j++) {
 368                         printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
 369                 }
 370                 for(j=0;j<40;j++) {
 371                         printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
 372                 }
 373 */
 374         } else {
 375                 struct saa7146_pgtable *pt = &buf->pt[0];
 376                 return saa7146_pgtable_build_single(pci, pt, list, length);
 377         }
 378
 379         return 0;
 380 }
 381
 382
 383 /********************************************************************************/
 384 /* file operations */
 385
 386 static int video_begin(struct saa7146_fh *fh)
 387 {
 388         struct saa7146_dev *dev = fh->dev;
 389         struct saa7146_vv *vv = dev->vv_data;
 390         struct saa7146_format *fmt = NULL;
 391         unsigned int resource;
 392         int ret = 0, err = 0;
 393
 394         DEB_EE("dev:%p, fh:%p\n", dev, fh);
 395
 396         if ((vv->video_status & STATUS_CAPTURE) != 0) {
 397                 if (vv->video_fh == fh) {
 398                         DEB_S("already capturing\n");
 399                         return 0;
 400                 }
 401                 DEB_S("already capturing in another open\n");
 402                 return -EBUSY;
 403         }
 404
 405         if ((vv->video_status & STATUS_OVERLAY) != 0) {
 406                 DEB_S("warning: suspending overlay video for streaming capture\n");
 407                 vv->ov_suspend = vv->video_fh;
 408                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
 409                 if (0 != err) {
 410                         DEB_D("suspending video failed. aborting\n");
 411                         return err;
 412                 }
 413         }
 414
 415         fmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat);
 416         /* we need to have a valid format set here */
 417         BUG_ON(NULL == fmt);
 418
 419         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 420                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
 421         } else {
 422                 resource = RESOURCE_DMA1_HPS;
 423         }
 424
 425         ret = saa7146_res_get(fh, resource);
 426         if (0 == ret) {
 427                 DEB_S("cannot get capture resource %d\n", resource);
 428                 if (vv->ov_suspend != NULL) {
 429                         saa7146_start_preview(vv->ov_suspend);
 430                         vv->ov_suspend = NULL;
 431                 }
 432                 return -EBUSY;
 433         }
 434
 435         /* clear out beginning of streaming bit (rps register 0)*/
 436         saa7146_write(dev, MC2, MASK_27 );
 437
 438         /* enable rps0 irqs */
 439         SAA7146_IER_ENABLE(dev, MASK_27);
 440
 441         vv->video_fh = fh;
 442         vv->video_status = STATUS_CAPTURE;
 443
 444         return 0;
 445 }
 446
 447 static int video_end(struct saa7146_fh *fh, struct file *file)
 448 {
 449         struct saa7146_dev *dev = fh->dev;
 450         struct saa7146_vv *vv = dev->vv_data;
 451         struct saa7146_format *fmt = NULL;
 452         unsigned long flags;
 453         unsigned int resource;
 454         u32 dmas = 0;
 455         DEB_EE("dev:%p, fh:%p\n", dev, fh);
 456
 457         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
 458                 DEB_S("not capturing\n");
 459                 return 0;
 460         }
 461
 462         if (vv->video_fh != fh) {
 463                 DEB_S("capturing, but in another open\n");
 464                 return -EBUSY;
 465         }
 466
 467         fmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat);
 468         /* we need to have a valid format set here */
 469         BUG_ON(NULL == fmt);
 470
 471         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
 472                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
 473                 dmas = MASK_22 | MASK_21 | MASK_20;
 474         } else {
 475                 resource = RESOURCE_DMA1_HPS;
 476                 dmas = MASK_22;
 477         }
 478         spin_lock_irqsave(&dev->slock,flags);
 479
 480         /* disable rps0  */
 481         saa7146_write(dev, MC1, MASK_28);
 482
 483         /* disable rps0 irqs */
 484         SAA7146_IER_DISABLE(dev, MASK_27);
 485
 486         /* shut down all used video dma transfers */
 487         saa7146_write(dev, MC1, dmas);
 488
 489         spin_unlock_irqrestore(&dev->slock, flags);
 490
 491         vv->video_fh = NULL;
 492         vv->video_status = 0;
 493
 494         saa7146_res_free(fh, resource);
 495
 496         if (vv->ov_suspend != NULL) {
 497                 saa7146_start_preview(vv->ov_suspend);
 498                 vv->ov_suspend = NULL;
 499         }
 500
 501         return 0;
 502 }
 503
 504 static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 505 {
 506         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 507
 508         strcpy((char *)cap->driver, "saa7146 v4l2");
 509         strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
 510         sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci));
 511         cap->version = SAA7146_VERSION_CODE;
 512         cap->capabilities =
 513                 V4L2_CAP_VIDEO_CAPTURE |
 514                 V4L2_CAP_VIDEO_OVERLAY |
 515                 V4L2_CAP_READWRITE |
 516                 V4L2_CAP_STREAMING;
 517         cap->capabilities |= dev->ext_vv_data->capabilities;
 518         return 0;
 519 }
 520
 521 static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
 522 {
 523         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 524         struct saa7146_vv *vv = dev->vv_data;
 525
 526         *fb = vv->ov_fb;
 527         fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
 528         return 0;
 529 }
 530
 531 static int vidioc_s_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
 532 {
 533         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 534         struct saa7146_vv *vv = dev->vv_data;
 535         struct saa7146_format *fmt;
 536
 537         DEB_EE("VIDIOC_S_FBUF\n");
 538
 539         if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
 540                 return -EPERM;
 541
 542         /* check args */
 543         fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat);
 544         if (NULL == fmt)
 545                 return -EINVAL;
 546
 547         /* planar formats are not allowed for overlay video, clipping and video dma would clash */
 548         if (fmt->flags & FORMAT_IS_PLANAR)
 549                 DEB_S("planar pixelformat '%4.4s' not allowed for overlay\n",
 550                       (char *)&fmt->pixelformat);
 551
 552         /* check if overlay is running */
 553         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 554                 if (vv->video_fh != fh) {
 555                         DEB_D("refusing to change framebuffer informations while overlay is active in another open\n");
 556                         return -EBUSY;
 557                 }
 558         }
 559
 560         /* ok, accept it */
 561         vv->ov_fb = *fb;
 562         vv->ov_fmt = fmt;
 563
 564         if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) {
 565                 vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8;
 566                 DEB_D("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline);
 567         }
 568         return 0;
 569 }
 570
 571 static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
 572 {
 573         if (f->index >= NUM_FORMATS)
 574                 return -EINVAL;
 575         strlcpy((char *)f->description, formats[f->index].name,
 576                         sizeof(f->description));
 577         f->pixelformat = formats[f->index].pixelformat;
 578         return 0;
 579 }
 580
 581 static int vidioc_queryctrl(struct file *file, void *fh, struct v4l2_queryctrl *c)
 582 {
 583         const struct v4l2_queryctrl *ctrl;
 584
 585         if ((c->id <  V4L2_CID_BASE ||
 586              c->id >= V4L2_CID_LASTP1) &&
 587             (c->id <  V4L2_CID_PRIVATE_BASE ||
 588              c->id >= V4L2_CID_PRIVATE_LASTP1))
 589                 return -EINVAL;
 590
 591         ctrl = ctrl_by_id(c->id);
 592         if (ctrl == NULL)
 593                 return -EINVAL;
 594
 595         DEB_EE("VIDIOC_QUERYCTRL: id:%d\n", c->id);
 596         *c = *ctrl;
 597         return 0;
 598 }
 599
 600 static int vidioc_g_ctrl(struct file *file, void *fh, struct v4l2_control *c)
 601 {
 602         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 603         struct saa7146_vv *vv = dev->vv_data;
 604         const struct v4l2_queryctrl *ctrl;
 605         u32 value = 0;
 606
 607         ctrl = ctrl_by_id(c->id);
 608         if (NULL == ctrl)
 609                 return -EINVAL;
 610         switch (c->id) {
 611         case V4L2_CID_BRIGHTNESS:
 612                 value = saa7146_read(dev, BCS_CTRL);
 613                 c->value = 0xff & (value >> 24);
 614                 DEB_D("V4L2_CID_BRIGHTNESS: %d\n", c->value);
 615                 break;
 616         case V4L2_CID_CONTRAST:
 617                 value = saa7146_read(dev, BCS_CTRL);
 618                 c->value = 0x7f & (value >> 16);
 619                 DEB_D("V4L2_CID_CONTRAST: %d\n", c->value);
 620                 break;
 621         case V4L2_CID_SATURATION:
 622                 value = saa7146_read(dev, BCS_CTRL);
 623                 c->value = 0x7f & (value >> 0);
 624                 DEB_D("V4L2_CID_SATURATION: %d\n", c->value);
 625                 break;
 626         case V4L2_CID_VFLIP:
 627                 c->value = vv->vflip;
 628                 DEB_D("V4L2_CID_VFLIP: %d\n", c->value);
 629                 break;
 630         case V4L2_CID_HFLIP:
 631                 c->value = vv->hflip;
 632                 DEB_D("V4L2_CID_HFLIP: %d\n", c->value);
 633                 break;
 634         default:
 635                 return -EINVAL;
 636         }
 637         return 0;
 638 }
 639
 640 static int vidioc_s_ctrl(struct file *file, void *fh, struct v4l2_control *c)
 641 {
 642         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 643         struct saa7146_vv *vv = dev->vv_data;
 644         const struct v4l2_queryctrl *ctrl;
 645
 646         ctrl = ctrl_by_id(c->id);
 647         if (NULL == ctrl) {
 648                 DEB_D("unknown control %d\n", c->id);
 649                 return -EINVAL;
 650         }
 651
 652         switch (ctrl->type) {
 653         case V4L2_CTRL_TYPE_BOOLEAN:
 654         case V4L2_CTRL_TYPE_MENU:
 655         case V4L2_CTRL_TYPE_INTEGER:
 656                 if (c->value < ctrl->minimum)
 657                         c->value = ctrl->minimum;
 658                 if (c->value > ctrl->maximum)
 659                         c->value = ctrl->maximum;
 660                 break;
 661         default:
 662                 /* nothing */;
 663         }
 664
 665         switch (c->id) {
 666         case V4L2_CID_BRIGHTNESS: {
 667                 u32 value = saa7146_read(dev, BCS_CTRL);
 668                 value &= 0x00ffffff;
 669                 value |= (c->value << 24);
 670                 saa7146_write(dev, BCS_CTRL, value);
 671                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 672                 break;
 673         }
 674         case V4L2_CID_CONTRAST: {
 675                 u32 value = saa7146_read(dev, BCS_CTRL);
 676                 value &= 0xff00ffff;
 677                 value |= (c->value << 16);
 678                 saa7146_write(dev, BCS_CTRL, value);
 679                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 680                 break;
 681         }
 682         case V4L2_CID_SATURATION: {
 683                 u32 value = saa7146_read(dev, BCS_CTRL);
 684                 value &= 0xffffff00;
 685                 value |= (c->value << 0);
 686                 saa7146_write(dev, BCS_CTRL, value);
 687                 saa7146_write(dev, MC2, MASK_22 | MASK_06);
 688                 break;
 689         }
 690         case V4L2_CID_HFLIP:
 691                 /* fixme: we can support changing VFLIP and HFLIP here... */
 692                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
 693                         DEB_D("V4L2_CID_HFLIP while active capture\n");
 694                         return -EBUSY;
 695                 }
 696                 vv->hflip = c->value;
 697                 break;
 698         case V4L2_CID_VFLIP:
 699                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
 700                         DEB_D("V4L2_CID_VFLIP while active capture\n");
 701                         return -EBUSY;
 702                 }
 703                 vv->vflip = c->value;
 704                 break;
 705         default:
 706                 return -EINVAL;
 707         }
 708
 709         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 710                 saa7146_stop_preview(fh);
 711                 saa7146_start_preview(fh);
 712         }
 713         return 0;
 714 }
 715
 716 static int vidioc_g_parm(struct file *file, void *fh,
 717                 struct v4l2_streamparm *parm)
 718 {
 719         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 720         struct saa7146_vv *vv = dev->vv_data;
 721
 722         parm->parm.capture.readbuffers = 1;
 723         v4l2_video_std_frame_period(vv->standard->id,
 724                                     &parm->parm.capture.timeperframe);
 725         return 0;
 726 }
 727
 728 static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
 729 {
 730         f->fmt.pix = ((struct saa7146_fh *)fh)->video_fmt;
 731         return 0;
 732 }
 733
 734 static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
 735 {
 736         f->fmt.win = ((struct saa7146_fh *)fh)->ov.win;
 737         return 0;
 738 }
 739
 740 static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f)
 741 {
 742         f->fmt.vbi = ((struct saa7146_fh *)fh)->vbi_fmt;
 743         return 0;
 744 }
 745
 746 static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
 747 {
 748         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 749         struct saa7146_vv *vv = dev->vv_data;
 750         struct saa7146_format *fmt;
 751         enum v4l2_field field;
 752         int maxw, maxh;
 753         int calc_bpl;
 754
 755         DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
 756
 757         fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat);
 758         if (NULL == fmt)
 759                 return -EINVAL;
 760
 761         field = f->fmt.pix.field;
 762         maxw  = vv->standard->h_max_out;
 763         maxh  = vv->standard->v_max_out;
 764
 765         if (V4L2_FIELD_ANY == field) {
 766                 field = (f->fmt.pix.height > maxh / 2)
 767                         ? V4L2_FIELD_INTERLACED
 768                         : V4L2_FIELD_BOTTOM;
 769         }
 770         switch (field) {
 771         case V4L2_FIELD_ALTERNATE:
 772                 vv->last_field = V4L2_FIELD_TOP;
 773                 maxh = maxh / 2;
 774                 break;
 775         case V4L2_FIELD_TOP:
 776         case V4L2_FIELD_BOTTOM:
 777                 vv->last_field = V4L2_FIELD_INTERLACED;
 778                 maxh = maxh / 2;
 779                 break;
 780         case V4L2_FIELD_INTERLACED:
 781                 vv->last_field = V4L2_FIELD_INTERLACED;
 782                 break;
 783         default:
 784                 DEB_D("no known field mode '%d'\n", field);
 785                 return -EINVAL;
 786         }
 787
 788         f->fmt.pix.field = field;
 789         if (f->fmt.pix.width > maxw)
 790                 f->fmt.pix.width = maxw;
 791         if (f->fmt.pix.height > maxh)
 792                 f->fmt.pix.height = maxh;
 793
 794         calc_bpl = (f->fmt.pix.width * fmt->depth) / 8;
 795
 796         if (f->fmt.pix.bytesperline < calc_bpl)
 797                 f->fmt.pix.bytesperline = calc_bpl;
 798
 799         if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */
 800                 f->fmt.pix.bytesperline = calc_bpl;
 801
 802         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
 803         DEB_D("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n",
 804               f->fmt.pix.width, f->fmt.pix.height,
 805               f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
 806
 807         return 0;
 808 }
 809
 810
 811 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
 812 {
 813         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 814         struct saa7146_vv *vv = dev->vv_data;
 815         struct v4l2_window *win = &f->fmt.win;
 816         enum v4l2_field field;
 817         int maxw, maxh;
 818
 819         DEB_EE("dev:%p\n", dev);
 820
 821         if (NULL == vv->ov_fb.base) {
 822                 DEB_D("no fb base set\n");
 823                 return -EINVAL;
 824         }
 825         if (NULL == vv->ov_fmt) {
 826                 DEB_D("no fb fmt set\n");
 827                 return -EINVAL;
 828         }
 829         if (win->w.width < 48 || win->w.height < 32) {
 830                 DEB_D("min width/height. (%d,%d)\n",
 831                       win->w.width, win->w.height);
 832                 return -EINVAL;
 833         }
 834         if (win->clipcount > 16) {
 835                 DEB_D("clipcount too big\n");
 836                 return -EINVAL;
 837         }
 838
 839         field = win->field;
 840         maxw  = vv->standard->h_max_out;
 841         maxh  = vv->standard->v_max_out;
 842
 843         if (V4L2_FIELD_ANY == field) {
 844                 field = (win->w.height > maxh / 2)
 845                         ? V4L2_FIELD_INTERLACED
 846                         : V4L2_FIELD_TOP;
 847                 }
 848         switch (field) {
 849         case V4L2_FIELD_TOP:
 850         case V4L2_FIELD_BOTTOM:
 851         case V4L2_FIELD_ALTERNATE:
 852                 maxh = maxh / 2;
 853                 break;
 854         case V4L2_FIELD_INTERLACED:
 855                 break;
 856         default:
 857                 DEB_D("no known field mode '%d'\n", field);
 858                 return -EINVAL;
 859         }
 860
 861         win->field = field;
 862         if (win->w.width > maxw)
 863                 win->w.width = maxw;
 864         if (win->w.height > maxh)
 865                 win->w.height = maxh;
 866
 867         return 0;
 868 }
 869
 870 static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f)
 871 {
 872         struct saa7146_fh *fh = __fh;
 873         struct saa7146_dev *dev = fh->dev;
 874         struct saa7146_vv *vv = dev->vv_data;
 875         int err;
 876
 877         DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
 878         if (IS_CAPTURE_ACTIVE(fh) != 0) {
 879                 DEB_EE("streaming capture is active\n");
 880                 return -EBUSY;
 881         }
 882         err = vidioc_try_fmt_vid_cap(file, fh, f);
 883         if (0 != err)
 884                 return err;
 885         fh->video_fmt = f->fmt.pix;
 886         DEB_EE("set to pixelformat '%4.4s'\n",
 887                (char *)&fh->video_fmt.pixelformat);
 888         return 0;
 889 }
 890
 891 static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f)
 892 {
 893         struct saa7146_fh *fh = __fh;
 894         struct saa7146_dev *dev = fh->dev;
 895         struct saa7146_vv *vv = dev->vv_data;
 896         int err;
 897
 898         DEB_EE("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh);
 899         err = vidioc_try_fmt_vid_overlay(file, fh, f);
 900         if (0 != err)
 901                 return err;
 902         fh->ov.win    = f->fmt.win;
 903         fh->ov.nclips = f->fmt.win.clipcount;
 904         if (fh->ov.nclips > 16)
 905                 fh->ov.nclips = 16;
 906         if (copy_from_user(fh->ov.clips, f->fmt.win.clips,
 907                                 sizeof(struct v4l2_clip) * fh->ov.nclips)) {
 908                 return -EFAULT;
 909         }
 910
 911         /* fh->ov.fh is used to indicate that we have valid overlay informations, too */
 912         fh->ov.fh = fh;
 913
 914         /* check if our current overlay is active */
 915         if (IS_OVERLAY_ACTIVE(fh) != 0) {
 916                 saa7146_stop_preview(fh);
 917                 saa7146_start_preview(fh);
 918         }
 919         return 0;
 920 }
 921
 922 static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm)
 923 {
 924         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 925         struct saa7146_vv *vv = dev->vv_data;
 926
 927         *norm = vv->standard->id;
 928         return 0;
 929 }
 930
 931         /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
 932            PAL / NTSC / SECAM. if your hardware does not (or does more)
 933            -- override this function in your extension */
 934 /*
 935         case VIDIOC_ENUMSTD:
 936         {
 937                 struct v4l2_standard *e = arg;
 938                 if (e->index < 0 )
 939                         return -EINVAL;
 940                 if( e->index < dev->ext_vv_data->num_stds ) {
 941                         DEB_EE("VIDIOC_ENUMSTD: index:%d\n", e->index);
 942                         v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
 943                         return 0;
 944                 }
 945                 return -EINVAL;
 946         }
 947         */
 948
 949 static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id *id)
 950 {
 951         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 952         struct saa7146_vv *vv = dev->vv_data;
 953         int found = 0;
 954         int err, i;
 955
 956         DEB_EE("VIDIOC_S_STD\n");
 957
 958         if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
 959                 DEB_D("cannot change video standard while streaming capture is active\n");
 960                 return -EBUSY;
 961         }
 962
 963         if ((vv->video_status & STATUS_OVERLAY) != 0) {
 964                 vv->ov_suspend = vv->video_fh;
 965                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
 966                 if (0 != err) {
 967                         DEB_D("suspending video failed. aborting\n");
 968                         return err;
 969                 }
 970         }
 971
 972         for (i = 0; i < dev->ext_vv_data->num_stds; i++)
 973                 if (*id & dev->ext_vv_data->stds[i].id)
 974                         break;
 975         if (i != dev->ext_vv_data->num_stds) {
 976                 vv->standard = &dev->ext_vv_data->stds[i];
 977                 if (NULL != dev->ext_vv_data->std_callback)
 978                         dev->ext_vv_data->std_callback(dev, vv->standard);
 979                 found = 1;
 980         }
 981
 982         if (vv->ov_suspend != NULL) {
 983                 saa7146_start_preview(vv->ov_suspend);
 984                 vv->ov_suspend = NULL;
 985         }
 986
 987         if (!found) {
 988                 DEB_EE("VIDIOC_S_STD: standard not found\n");
 989                 return -EINVAL;
 990         }
 991
 992         DEB_EE("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name);
 993         return 0;
 994 }
 995
 996 static int vidioc_overlay(struct file *file, void *fh, unsigned int on)
 997 {
 998         int err;
 999
1000         DEB_D("VIDIOC_OVERLAY on:%d\n", on);
1001         if (on)
1002                 err = saa7146_start_preview(fh);
1003         else
1004                 err = saa7146_stop_preview(fh);
1005         return err;
1006 }
1007
1008 static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b)
1009 {
1010         struct saa7146_fh *fh = __fh;
1011
1012         if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1013                 return videobuf_reqbufs(&fh->video_q, b);
1014         if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1015                 return videobuf_reqbufs(&fh->vbi_q, b);
1016         return -EINVAL;
1017 }
1018
1019 static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1020 {
1021         struct saa7146_fh *fh = __fh;
1022
1023         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1024                 return videobuf_querybuf(&fh->video_q, buf);
1025         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1026                 return videobuf_querybuf(&fh->vbi_q, buf);
1027         return -EINVAL;
1028 }
1029
1030 static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1031 {
1032         struct saa7146_fh *fh = __fh;
1033
1034         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1035                 return videobuf_qbuf(&fh->video_q, buf);
1036         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1037                 return videobuf_qbuf(&fh->vbi_q, buf);
1038         return -EINVAL;
1039 }
1040
1041 static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1042 {
1043         struct saa7146_fh *fh = __fh;
1044
1045         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1046                 return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK);
1047         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1048                 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK);
1049         return -EINVAL;
1050 }
1051
1052 static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
1053 {
1054         struct saa7146_fh *fh = __fh;
1055         int err;
1056
1057         DEB_D("VIDIOC_STREAMON, type:%d\n", type);
1058
1059         err = video_begin(fh);
1060         if (err)
1061                 return err;
1062         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1063                 return videobuf_streamon(&fh->video_q);
1064         if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1065                 return videobuf_streamon(&fh->vbi_q);
1066         return -EINVAL;
1067 }
1068
1069 static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
1070 {
1071         struct saa7146_fh *fh = __fh;
1072         struct saa7146_dev *dev = fh->dev;
1073         struct saa7146_vv *vv = dev->vv_data;
1074         int err;
1075
1076         DEB_D("VIDIOC_STREAMOFF, type:%d\n", type);
1077
1078         /* ugly: we need to copy some checks from video_end(),
1079            because videobuf_streamoff() relies on the capture running.
1080            check and fix this */
1081         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
1082                 DEB_S("not capturing\n");
1083                 return 0;
1084         }
1085
1086         if (vv->video_fh != fh) {
1087                 DEB_S("capturing, but in another open\n");
1088                 return -EBUSY;
1089         }
1090
1091         err = -EINVAL;
1092         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1093                 err = videobuf_streamoff(&fh->video_q);
1094         else if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1095                 err = videobuf_streamoff(&fh->vbi_q);
1096         if (0 != err) {
1097                 DEB_D("warning: videobuf_streamoff() failed\n");
1098                 video_end(fh, file);
1099         } else {
1100                 err = video_end(fh, file);
1101         }
1102         return err;
1103 }
1104
1105 static int vidioc_g_chip_ident(struct file *file, void *__fh,
1106                 struct v4l2_dbg_chip_ident *chip)
1107 {
1108         struct saa7146_fh *fh = __fh;
1109         struct saa7146_dev *dev = fh->dev;
1110
1111         chip->ident = V4L2_IDENT_NONE;
1112         chip->revision = 0;
1113         if (chip->match.type == V4L2_CHIP_MATCH_HOST && !chip->match.addr) {
1114                 chip->ident = V4L2_IDENT_SAA7146;
1115                 return 0;
1116         }
1117         return v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1118                         core, g_chip_ident, chip);
1119 }
1120
1121 const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
1122         .vidioc_querycap             = vidioc_querycap,
1123         .vidioc_enum_fmt_vid_cap     = vidioc_enum_fmt_vid_cap,
1124         .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap,
1125         .vidioc_g_fmt_vid_cap        = vidioc_g_fmt_vid_cap,
1126         .vidioc_try_fmt_vid_cap      = vidioc_try_fmt_vid_cap,
1127         .vidioc_s_fmt_vid_cap        = vidioc_s_fmt_vid_cap,
1128         .vidioc_g_fmt_vid_overlay    = vidioc_g_fmt_vid_overlay,
1129         .vidioc_try_fmt_vid_overlay  = vidioc_try_fmt_vid_overlay,
1130         .vidioc_s_fmt_vid_overlay    = vidioc_s_fmt_vid_overlay,
1131         .vidioc_g_fmt_vbi_cap        = vidioc_g_fmt_vbi_cap,
1132         .vidioc_g_chip_ident         = vidioc_g_chip_ident,
1133
1134         .vidioc_overlay              = vidioc_overlay,
1135         .vidioc_g_fbuf               = vidioc_g_fbuf,
1136         .vidioc_s_fbuf               = vidioc_s_fbuf,
1137         .vidioc_reqbufs              = vidioc_reqbufs,
1138         .vidioc_querybuf             = vidioc_querybuf,
1139         .vidioc_qbuf                 = vidioc_qbuf,
1140         .vidioc_dqbuf                = vidioc_dqbuf,
1141         .vidioc_g_std                = vidioc_g_std,
1142         .vidioc_s_std                = vidioc_s_std,
1143         .vidioc_queryctrl            = vidioc_queryctrl,
1144         .vidioc_g_ctrl               = vidioc_g_ctrl,
1145         .vidioc_s_ctrl               = vidioc_s_ctrl,
1146         .vidioc_streamon             = vidioc_streamon,
1147         .vidioc_streamoff            = vidioc_streamoff,
1148         .vidioc_g_parm               = vidioc_g_parm,
1149 };
1150
1151 /*********************************************************************************/
1152 /* buffer handling functions                                                  */
1153
1154 static int buffer_activate (struct saa7146_dev *dev,
1155                      struct saa7146_buf *buf,
1156                      struct saa7146_buf *next)
1157 {
1158         struct saa7146_vv *vv = dev->vv_data;
1159
1160         buf->vb.state = VIDEOBUF_ACTIVE;
1161         saa7146_set_capture(dev,buf,next);
1162
1163         mod_timer(&vv->video_q.timeout, jiffies+BUFFER_TIMEOUT);
1164         return 0;
1165 }
1166
1167 static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf)
1168 {
1169         saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1170         saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1171         saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1172 }
1173
1174 static int buffer_prepare(struct videobuf_queue *q,
1175                           struct videobuf_buffer *vb, enum v4l2_field field)
1176 {
1177         struct file *file = q->priv_data;
1178         struct saa7146_fh *fh = file->private_data;
1179         struct saa7146_dev *dev = fh->dev;
1180         struct saa7146_vv *vv = dev->vv_data;
1181         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1182         int size,err = 0;
1183
1184         DEB_CAP("vbuf:%p\n", vb);
1185
1186         /* sanity checks */
1187         if (fh->video_fmt.width  < 48 ||
1188             fh->video_fmt.height < 32 ||
1189             fh->video_fmt.width  > vv->standard->h_max_out ||
1190             fh->video_fmt.height > vv->standard->v_max_out) {
1191                 DEB_D("w (%d) / h (%d) out of bounds\n",
1192                       fh->video_fmt.width, fh->video_fmt.height);
1193                 return -EINVAL;
1194         }
1195
1196         size = fh->video_fmt.sizeimage;
1197         if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1198                 DEB_D("size mismatch\n");
1199                 return -EINVAL;
1200         }
1201
1202         DEB_CAP("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1203                 fh->video_fmt.width, fh->video_fmt.height,
1204                 size, v4l2_field_names[fh->video_fmt.field]);
1205         if (buf->vb.width  != fh->video_fmt.width  ||
1206             buf->vb.bytesperline != fh->video_fmt.bytesperline ||
1207             buf->vb.height != fh->video_fmt.height ||
1208             buf->vb.size   != size ||
1209             buf->vb.field  != field      ||
1210             buf->vb.field  != fh->video_fmt.field  ||
1211             buf->fmt       != &fh->video_fmt) {
1212                 saa7146_dma_free(dev,q,buf);
1213         }
1214
1215         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1216                 struct saa7146_format *sfmt;
1217
1218                 buf->vb.bytesperline  = fh->video_fmt.bytesperline;
1219                 buf->vb.width  = fh->video_fmt.width;
1220                 buf->vb.height = fh->video_fmt.height;
1221                 buf->vb.size   = size;
1222                 buf->vb.field  = field;
1223                 buf->fmt       = &fh->video_fmt;
1224                 buf->vb.field  = fh->video_fmt.field;
1225
1226                 sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
1227
1228                 release_all_pagetables(dev, buf);
1229                 if( 0 != IS_PLANAR(sfmt->trans)) {
1230                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1231                         saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1232                         saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1233                 } else {
1234                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1235                 }
1236
1237                 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1238                 if (err)
1239                         goto oops;
1240                 err = saa7146_pgtable_build(dev,buf);
1241                 if (err)
1242                         goto oops;
1243         }
1244         buf->vb.state = VIDEOBUF_PREPARED;
1245         buf->activate = buffer_activate;
1246
1247         return 0;
1248
1249  oops:
1250         DEB_D("error out\n");
1251         saa7146_dma_free(dev,q,buf);
1252
1253         return err;
1254 }
1255
1256 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1257 {
1258         struct file *file = q->priv_data;
1259         struct saa7146_fh *fh = file->private_data;
1260
1261         if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1262                 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1263
1264         *size = fh->video_fmt.sizeimage;
1265
1266         /* check if we exceed the "max_memory" parameter */
1267         if( (*count * *size) > (max_memory*1048576) ) {
1268                 *count = (max_memory*1048576) / *size;
1269         }
1270
1271         DEB_CAP("%d buffers, %d bytes each\n", *count, *size);
1272
1273         return 0;
1274 }
1275
1276 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1277 {
1278         struct file *file = q->priv_data;
1279         struct saa7146_fh *fh = file->private_data;
1280         struct saa7146_dev *dev = fh->dev;
1281         struct saa7146_vv *vv = dev->vv_data;
1282         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1283
1284         DEB_CAP("vbuf:%p\n", vb);
1285         saa7146_buffer_queue(fh->dev,&vv->video_q,buf);
1286 }
1287
1288 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1289 {
1290         struct file *file = q->priv_data;
1291         struct saa7146_fh *fh = file->private_data;
1292         struct saa7146_dev *dev = fh->dev;
1293         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1294
1295         DEB_CAP("vbuf:%p\n", vb);
1296
1297         saa7146_dma_free(dev,q,buf);
1298
1299         release_all_pagetables(dev, buf);
1300 }
1301
1302 static struct videobuf_queue_ops video_qops = {
1303         .buf_setup    = buffer_setup,
1304         .buf_prepare  = buffer_prepare,
1305         .buf_queue    = buffer_queue,
1306         .buf_release  = buffer_release,
1307 };
1308
1309 /********************************************************************************/
1310 /* file operations */
1311
1312 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1313 {
1314         INIT_LIST_HEAD(&vv->video_q.queue);
1315
1316         init_timer(&vv->video_q.timeout);
1317         vv->video_q.timeout.function = saa7146_buffer_timeout;
1318         vv->video_q.timeout.data     = (unsigned long)(&vv->video_q);
1319         vv->video_q.dev              = dev;
1320
1321         /* set some default values */
1322         vv->standard = &dev->ext_vv_data->stds[0];
1323
1324         /* FIXME: what's this? */
1325         vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1326         vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1327 }
1328
1329
1330 static int video_open(struct saa7146_dev *dev, struct file *file)
1331 {
1332         struct saa7146_fh *fh = file->private_data;
1333         struct saa7146_format *sfmt;
1334
1335         fh->video_fmt.width = 384;
1336         fh->video_fmt.height = 288;
1337         fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24;
1338         fh->video_fmt.bytesperline = 0;
1339         fh->video_fmt.field = V4L2_FIELD_ANY;
1340         sfmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat);
1341         fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8;
1342
1343         videobuf_queue_sg_init(&fh->video_q, &video_qops,
1344                             &dev->pci->dev, &dev->slock,
1345                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
1346                             V4L2_FIELD_INTERLACED,
1347                             sizeof(struct saa7146_buf),
1348                             file, &dev->v4l2_lock);
1349
1350         return 0;
1351 }
1352
1353
1354 static void video_close(struct saa7146_dev *dev, struct file *file)
1355 {
1356         struct saa7146_fh *fh = file->private_data;
1357         struct saa7146_vv *vv = dev->vv_data;
1358         struct videobuf_queue *q = &fh->video_q;
1359
1360         if (IS_CAPTURE_ACTIVE(fh) != 0)
1361                 video_end(fh, file);
1362         else if (IS_OVERLAY_ACTIVE(fh) != 0)
1363                 saa7146_stop_preview(fh);
1364
1365         videobuf_stop(q);
1366         /* hmm, why is this function declared void? */
1367 }
1368
1369
1370 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1371 {
1372         struct saa7146_vv *vv = dev->vv_data;
1373         struct saa7146_dmaqueue *q = &vv->video_q;
1374
1375         spin_lock(&dev->slock);
1376         DEB_CAP("called\n");
1377
1378         /* only finish the buffer if we have one... */
1379         if( NULL != q->curr ) {
1380                 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1381         }
1382         saa7146_buffer_next(dev,q,0);
1383
1384         spin_unlock(&dev->slock);
1385 }
1386
1387 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1388 {
1389         struct saa7146_fh *fh = file->private_data;
1390         struct saa7146_dev *dev = fh->dev;
1391         struct saa7146_vv *vv = dev->vv_data;
1392         ssize_t ret = 0;
1393
1394         DEB_EE("called\n");
1395
1396         if ((vv->video_status & STATUS_CAPTURE) != 0) {
1397                 /* fixme: should we allow read() captures while streaming capture? */
1398                 if (vv->video_fh == fh) {
1399                         DEB_S("already capturing\n");
1400                         return -EBUSY;
1401                 }
1402                 DEB_S("already capturing in another open\n");
1403                 return -EBUSY;
1404         }
1405
1406         ret = video_begin(fh);
1407         if( 0 != ret) {
1408                 goto out;
1409         }
1410
1411         ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1412                                 file->f_flags & O_NONBLOCK);
1413         if (ret != 0) {
1414                 video_end(fh, file);
1415         } else {
1416                 ret = video_end(fh, file);
1417         }
1418 out:
1419         /* restart overlay if it was active before */
1420         if (vv->ov_suspend != NULL) {
1421                 saa7146_start_preview(vv->ov_suspend);
1422                 vv->ov_suspend = NULL;
1423         }
1424
1425         return ret;
1426 }
1427
1428 struct saa7146_use_ops saa7146_video_uops = {
1429         .init = video_init,
1430         .open = video_open,
1431         .release = video_close,
1432         .irq_done = video_irq_done,
1433         .read = video_read,
1434 };