Merge branch 'topic/asoc' into for-linus
[linux-2.6] / drivers / media / common / saa7146_video.c
1 #include <media/saa7146_vv.h>
2
3 static int max_memory = 32;
4
5 module_param(max_memory, int, 0644);
6 MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)");
7
8 #define IS_CAPTURE_ACTIVE(fh) \
9         (((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh))
10
11 #define IS_OVERLAY_ACTIVE(fh) \
12         (((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh))
13
14 /* format descriptions for capture and preview */
15 static struct saa7146_format formats[] = {
16         {
17                 .name           = "RGB-8 (3-3-2)",
18                 .pixelformat    = V4L2_PIX_FMT_RGB332,
19                 .trans          = RGB08_COMPOSED,
20                 .depth          = 8,
21                 .flags          = 0,
22         }, {
23                 .name           = "RGB-16 (5/B-6/G-5/R)",
24                 .pixelformat    = V4L2_PIX_FMT_RGB565,
25                 .trans          = RGB16_COMPOSED,
26                 .depth          = 16,
27                 .flags          = 0,
28         }, {
29                 .name           = "RGB-24 (B-G-R)",
30                 .pixelformat    = V4L2_PIX_FMT_BGR24,
31                 .trans          = RGB24_COMPOSED,
32                 .depth          = 24,
33                 .flags          = 0,
34         }, {
35                 .name           = "RGB-32 (B-G-R)",
36                 .pixelformat    = V4L2_PIX_FMT_BGR32,
37                 .trans          = RGB32_COMPOSED,
38                 .depth          = 32,
39                 .flags          = 0,
40         }, {
41                 .name           = "RGB-32 (R-G-B)",
42                 .pixelformat    = V4L2_PIX_FMT_RGB32,
43                 .trans          = RGB32_COMPOSED,
44                 .depth          = 32,
45                 .flags          = 0,
46                 .swap           = 0x2,
47         }, {
48                 .name           = "Greyscale-8",
49                 .pixelformat    = V4L2_PIX_FMT_GREY,
50                 .trans          = Y8,
51                 .depth          = 8,
52                 .flags          = 0,
53         }, {
54                 .name           = "YUV 4:2:2 planar (Y-Cb-Cr)",
55                 .pixelformat    = V4L2_PIX_FMT_YUV422P,
56                 .trans          = YUV422_DECOMPOSED,
57                 .depth          = 16,
58                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
59         }, {
60                 .name           = "YVU 4:2:0 planar (Y-Cb-Cr)",
61                 .pixelformat    = V4L2_PIX_FMT_YVU420,
62                 .trans          = YUV420_DECOMPOSED,
63                 .depth          = 12,
64                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
65         }, {
66                 .name           = "YUV 4:2:0 planar (Y-Cb-Cr)",
67                 .pixelformat    = V4L2_PIX_FMT_YUV420,
68                 .trans          = YUV420_DECOMPOSED,
69                 .depth          = 12,
70                 .flags          = FORMAT_IS_PLANAR,
71         }, {
72                 .name           = "YUV 4:2:2 (U-Y-V-Y)",
73                 .pixelformat    = V4L2_PIX_FMT_UYVY,
74                 .trans          = YUV422_COMPOSED,
75                 .depth          = 16,
76                 .flags          = 0,
77         }
78 };
79
80 /* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps.
81    due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped
82    (like V4L2_PIX_FMT_YUYV) ... 8-( */
83
84 static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
85
86 struct saa7146_format* format_by_fourcc(struct saa7146_dev *dev, int fourcc)
87 {
88         int i, j = NUM_FORMATS;
89
90         for (i = 0; i < j; i++) {
91                 if (formats[i].pixelformat == fourcc) {
92                         return formats+i;
93                 }
94         }
95
96         DEB_D(("unknown pixelformat:'%4.4s'\n",(char *)&fourcc));
97         return NULL;
98 }
99
100 static int g_fmt(struct saa7146_fh *fh, struct v4l2_format *f)
101 {
102         struct saa7146_dev *dev = fh->dev;
103         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
104
105         switch (f->type) {
106         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
107                 f->fmt.pix = fh->video_fmt;
108                 return 0;
109         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
110                 f->fmt.win = fh->ov.win;
111                 return 0;
112         case V4L2_BUF_TYPE_VBI_CAPTURE:
113         {
114                 f->fmt.vbi = fh->vbi_fmt;
115                 return 0;
116         }
117         default:
118                 DEB_D(("invalid format type '%d'.\n",f->type));
119                 return -EINVAL;
120         }
121 }
122
123 static int try_win(struct saa7146_dev *dev, struct v4l2_window *win)
124 {
125         struct saa7146_vv *vv = dev->vv_data;
126         enum v4l2_field field;
127         int maxw, maxh;
128
129         DEB_EE(("dev:%p\n",dev));
130
131         if (NULL == vv->ov_fb.base) {
132                 DEB_D(("no fb base set.\n"));
133                 return -EINVAL;
134         }
135         if (NULL == vv->ov_fmt) {
136                 DEB_D(("no fb fmt set.\n"));
137                 return -EINVAL;
138         }
139         if (win->w.width < 48 || win->w.height <  32) {
140                 DEB_D(("min width/height. (%d,%d)\n",win->w.width,win->w.height));
141                 return -EINVAL;
142         }
143         if (win->clipcount > 16) {
144                 DEB_D(("clipcount too big.\n"));
145                 return -EINVAL;
146         }
147
148         field = win->field;
149         maxw  = vv->standard->h_max_out;
150         maxh  = vv->standard->v_max_out;
151
152         if (V4L2_FIELD_ANY == field) {
153                 field = (win->w.height > maxh/2)
154                         ? V4L2_FIELD_INTERLACED
155                         : V4L2_FIELD_TOP;
156                 }
157         switch (field) {
158         case V4L2_FIELD_TOP:
159         case V4L2_FIELD_BOTTOM:
160         case V4L2_FIELD_ALTERNATE:
161                 maxh = maxh / 2;
162                 break;
163         case V4L2_FIELD_INTERLACED:
164                 break;
165         default: {
166                 DEB_D(("no known field mode '%d'.\n",field));
167                 return -EINVAL;
168         }
169         }
170
171         win->field = field;
172         if (win->w.width > maxw)
173                 win->w.width = maxw;
174         if (win->w.height > maxh)
175                 win->w.height = maxh;
176
177         return 0;
178 }
179
180 static int try_fmt(struct saa7146_fh *fh, struct v4l2_format *f)
181 {
182         struct saa7146_dev *dev = fh->dev;
183         struct saa7146_vv *vv = dev->vv_data;
184         int err;
185
186         switch (f->type) {
187         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
188         {
189                 struct saa7146_format *fmt;
190                 enum v4l2_field field;
191                 int maxw, maxh;
192                 int calc_bpl;
193
194                 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n",dev,fh));
195
196                 fmt = format_by_fourcc(dev,f->fmt.pix.pixelformat);
197                 if (NULL == fmt) {
198                         return -EINVAL;
199                 }
200
201                 field = f->fmt.pix.field;
202                 maxw  = vv->standard->h_max_out;
203                 maxh  = vv->standard->v_max_out;
204
205                 if (V4L2_FIELD_ANY == field) {
206                         field = (f->fmt.pix.height > maxh/2)
207                                 ? V4L2_FIELD_INTERLACED
208                                 : V4L2_FIELD_BOTTOM;
209                 }
210                 switch (field) {
211                 case V4L2_FIELD_ALTERNATE: {
212                         vv->last_field = V4L2_FIELD_TOP;
213                         maxh = maxh / 2;
214                         break;
215                 }
216                 case V4L2_FIELD_TOP:
217                 case V4L2_FIELD_BOTTOM:
218                         vv->last_field = V4L2_FIELD_INTERLACED;
219                         maxh = maxh / 2;
220                         break;
221                 case V4L2_FIELD_INTERLACED:
222                         vv->last_field = V4L2_FIELD_INTERLACED;
223                         break;
224                 default: {
225                         DEB_D(("no known field mode '%d'.\n",field));
226                         return -EINVAL;
227                 }
228                 }
229
230                 f->fmt.pix.field = field;
231                 if (f->fmt.pix.width > maxw)
232                         f->fmt.pix.width = maxw;
233                 if (f->fmt.pix.height > maxh)
234                         f->fmt.pix.height = maxh;
235
236                 calc_bpl = (f->fmt.pix.width * fmt->depth)/8;
237
238                 if (f->fmt.pix.bytesperline < calc_bpl)
239                         f->fmt.pix.bytesperline = calc_bpl;
240
241                 if (f->fmt.pix.bytesperline > (2*PAGE_SIZE * fmt->depth)/8) /* arbitrary constraint */
242                         f->fmt.pix.bytesperline = calc_bpl;
243
244                 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
245                 DEB_D(("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n",f->fmt.pix.width,f->fmt.pix.height,f->fmt.pix.bytesperline,f->fmt.pix.sizeimage));
246
247                 return 0;
248         }
249         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
250                 DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n",dev,fh));
251                 err = try_win(dev,&f->fmt.win);
252                 if (0 != err) {
253                         return err;
254                 }
255                 return 0;
256         default:
257                 DEB_EE(("unknown format type '%d'\n",f->type));
258                 return -EINVAL;
259         }
260 }
261
262 int saa7146_start_preview(struct saa7146_fh *fh)
263 {
264         struct saa7146_dev *dev = fh->dev;
265         struct saa7146_vv *vv = dev->vv_data;
266         int ret = 0, err = 0;
267
268         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
269
270         /* check if we have overlay informations */
271         if( NULL == fh->ov.fh ) {
272                 DEB_D(("no overlay data available. try S_FMT first.\n"));
273                 return -EAGAIN;
274         }
275
276         /* check if streaming capture is running */
277         if (IS_CAPTURE_ACTIVE(fh) != 0) {
278                 DEB_D(("streaming capture is active.\n"));
279                 return -EBUSY;
280         }
281
282         /* check if overlay is running */
283         if (IS_OVERLAY_ACTIVE(fh) != 0) {
284                 if (vv->video_fh == fh) {
285                         DEB_D(("overlay is already active.\n"));
286                         return 0;
287                 }
288                 DEB_D(("overlay is already active in another open.\n"));
289                 return -EBUSY;
290         }
291
292         if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
293                 DEB_D(("cannot get necessary overlay resources\n"));
294                 return -EBUSY;
295         }
296
297         err = try_win(dev,&fh->ov.win);
298         if (0 != err) {
299                 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
300                 return -EBUSY;
301         }
302
303         vv->ov_data = &fh->ov;
304
305         DEB_D(("%dx%d+%d+%d %s field=%s\n",
306                 fh->ov.win.w.width,fh->ov.win.w.height,
307                 fh->ov.win.w.left,fh->ov.win.w.top,
308                 vv->ov_fmt->name,v4l2_field_names[fh->ov.win.field]));
309
310         if (0 != (ret = saa7146_enable_overlay(fh))) {
311                 DEB_D(("enabling overlay failed: %d\n",ret));
312                 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
313                 return ret;
314         }
315
316         vv->video_status = STATUS_OVERLAY;
317         vv->video_fh = fh;
318
319         return 0;
320 }
321 EXPORT_SYMBOL_GPL(saa7146_start_preview);
322
323 int saa7146_stop_preview(struct saa7146_fh *fh)
324 {
325         struct saa7146_dev *dev = fh->dev;
326         struct saa7146_vv *vv = dev->vv_data;
327
328         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
329
330         /* check if streaming capture is running */
331         if (IS_CAPTURE_ACTIVE(fh) != 0) {
332                 DEB_D(("streaming capture is active.\n"));
333                 return -EBUSY;
334         }
335
336         /* check if overlay is running at all */
337         if ((vv->video_status & STATUS_OVERLAY) == 0) {
338                 DEB_D(("no active overlay.\n"));
339                 return 0;
340         }
341
342         if (vv->video_fh != fh) {
343                 DEB_D(("overlay is active, but in another open.\n"));
344                 return -EBUSY;
345         }
346
347         vv->video_status = 0;
348         vv->video_fh = NULL;
349
350         saa7146_disable_overlay(fh);
351
352         saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
353
354         return 0;
355 }
356 EXPORT_SYMBOL_GPL(saa7146_stop_preview);
357
358 static int s_fmt(struct saa7146_fh *fh, struct v4l2_format *f)
359 {
360         struct saa7146_dev *dev = fh->dev;
361         struct saa7146_vv *vv = dev->vv_data;
362
363         int err;
364
365         switch (f->type) {
366         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
367                 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n",dev,fh));
368                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
369                         DEB_EE(("streaming capture is active\n"));
370                         return -EBUSY;
371                 }
372                 err = try_fmt(fh,f);
373                 if (0 != err)
374                         return err;
375                 fh->video_fmt = f->fmt.pix;
376                 DEB_EE(("set to pixelformat '%4.4s'\n",(char *)&fh->video_fmt.pixelformat));
377                 return 0;
378         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
379                 DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n",dev,fh));
380                 err = try_win(dev,&f->fmt.win);
381                 if (0 != err)
382                         return err;
383                 mutex_lock(&dev->lock);
384                 fh->ov.win    = f->fmt.win;
385                 fh->ov.nclips = f->fmt.win.clipcount;
386                 if (fh->ov.nclips > 16)
387                         fh->ov.nclips = 16;
388                 if (copy_from_user(fh->ov.clips,f->fmt.win.clips,sizeof(struct v4l2_clip)*fh->ov.nclips)) {
389                         mutex_unlock(&dev->lock);
390                         return -EFAULT;
391                 }
392
393                 /* fh->ov.fh is used to indicate that we have valid overlay informations, too */
394                 fh->ov.fh = fh;
395
396                 mutex_unlock(&dev->lock);
397
398                 /* check if our current overlay is active */
399                 if (IS_OVERLAY_ACTIVE(fh) != 0) {
400                         saa7146_stop_preview(fh);
401                         saa7146_start_preview(fh);
402                 }
403                 return 0;
404         default:
405                 DEB_D(("unknown format type '%d'\n",f->type));
406                 return -EINVAL;
407         }
408 }
409
410 /********************************************************************************/
411 /* device controls */
412
413 static struct v4l2_queryctrl controls[] = {
414         {
415                 .id             = V4L2_CID_BRIGHTNESS,
416                 .name           = "Brightness",
417                 .minimum        = 0,
418                 .maximum        = 255,
419                 .step           = 1,
420                 .default_value  = 128,
421                 .type           = V4L2_CTRL_TYPE_INTEGER,
422         },{
423                 .id             = V4L2_CID_CONTRAST,
424                 .name           = "Contrast",
425                 .minimum        = 0,
426                 .maximum        = 127,
427                 .step           = 1,
428                 .default_value  = 64,
429                 .type           = V4L2_CTRL_TYPE_INTEGER,
430         },{
431                 .id             = V4L2_CID_SATURATION,
432                 .name           = "Saturation",
433                 .minimum        = 0,
434                 .maximum        = 127,
435                 .step           = 1,
436                 .default_value  = 64,
437                 .type           = V4L2_CTRL_TYPE_INTEGER,
438         },{
439                 .id             = V4L2_CID_VFLIP,
440                 .name           = "Vertical flip",
441                 .minimum        = 0,
442                 .maximum        = 1,
443                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
444         },{
445                 .id             = V4L2_CID_HFLIP,
446                 .name           = "Horizontal flip",
447                 .minimum        = 0,
448                 .maximum        = 1,
449                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
450         },
451 };
452 static int NUM_CONTROLS = sizeof(controls)/sizeof(struct v4l2_queryctrl);
453
454 #define V4L2_CID_PRIVATE_LASTP1      (V4L2_CID_PRIVATE_BASE + 0)
455
456 static struct v4l2_queryctrl* ctrl_by_id(int id)
457 {
458         int i;
459
460         for (i = 0; i < NUM_CONTROLS; i++)
461                 if (controls[i].id == id)
462                         return controls+i;
463         return NULL;
464 }
465
466 static int get_control(struct saa7146_fh *fh, struct v4l2_control *c)
467 {
468         struct saa7146_dev *dev = fh->dev;
469         struct saa7146_vv *vv = dev->vv_data;
470
471         const struct v4l2_queryctrl* ctrl;
472         u32 value = 0;
473
474         ctrl = ctrl_by_id(c->id);
475         if (NULL == ctrl)
476                 return -EINVAL;
477         switch (c->id) {
478         case V4L2_CID_BRIGHTNESS:
479                 value = saa7146_read(dev, BCS_CTRL);
480                 c->value = 0xff & (value >> 24);
481                 DEB_D(("V4L2_CID_BRIGHTNESS: %d\n",c->value));
482                 break;
483         case V4L2_CID_CONTRAST:
484                 value = saa7146_read(dev, BCS_CTRL);
485                 c->value = 0x7f & (value >> 16);
486                 DEB_D(("V4L2_CID_CONTRAST: %d\n",c->value));
487                 break;
488         case V4L2_CID_SATURATION:
489                 value = saa7146_read(dev, BCS_CTRL);
490                 c->value = 0x7f & (value >> 0);
491                 DEB_D(("V4L2_CID_SATURATION: %d\n",c->value));
492                 break;
493         case V4L2_CID_VFLIP:
494                 c->value = vv->vflip;
495                 DEB_D(("V4L2_CID_VFLIP: %d\n",c->value));
496                 break;
497         case V4L2_CID_HFLIP:
498                 c->value = vv->hflip;
499                 DEB_D(("V4L2_CID_HFLIP: %d\n",c->value));
500                 break;
501         default:
502                 return -EINVAL;
503         }
504
505         return 0;
506 }
507
508 static int set_control(struct saa7146_fh *fh, struct v4l2_control *c)
509 {
510         struct saa7146_dev *dev = fh->dev;
511         struct saa7146_vv *vv = dev->vv_data;
512
513         const struct v4l2_queryctrl* ctrl;
514
515         ctrl = ctrl_by_id(c->id);
516         if (NULL == ctrl) {
517                 DEB_D(("unknown control %d\n",c->id));
518                 return -EINVAL;
519         }
520
521         mutex_lock(&dev->lock);
522
523         switch (ctrl->type) {
524         case V4L2_CTRL_TYPE_BOOLEAN:
525         case V4L2_CTRL_TYPE_MENU:
526         case V4L2_CTRL_TYPE_INTEGER:
527                 if (c->value < ctrl->minimum)
528                         c->value = ctrl->minimum;
529                 if (c->value > ctrl->maximum)
530                         c->value = ctrl->maximum;
531                 break;
532         default:
533                 /* nothing */;
534         };
535
536         switch (c->id) {
537         case V4L2_CID_BRIGHTNESS: {
538                 u32 value = saa7146_read(dev, BCS_CTRL);
539                 value &= 0x00ffffff;
540                 value |= (c->value << 24);
541                 saa7146_write(dev, BCS_CTRL, value);
542                 saa7146_write(dev, MC2, MASK_22 | MASK_06 );
543                 break;
544         }
545         case V4L2_CID_CONTRAST: {
546                 u32 value = saa7146_read(dev, BCS_CTRL);
547                 value &= 0xff00ffff;
548                 value |= (c->value << 16);
549                 saa7146_write(dev, BCS_CTRL, value);
550                 saa7146_write(dev, MC2, MASK_22 | MASK_06 );
551                 break;
552         }
553         case V4L2_CID_SATURATION: {
554                 u32 value = saa7146_read(dev, BCS_CTRL);
555                 value &= 0xffffff00;
556                 value |= (c->value << 0);
557                 saa7146_write(dev, BCS_CTRL, value);
558                 saa7146_write(dev, MC2, MASK_22 | MASK_06 );
559                 break;
560         }
561         case V4L2_CID_HFLIP:
562                 /* fixme: we can support changing VFLIP and HFLIP here... */
563                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
564                         DEB_D(("V4L2_CID_HFLIP while active capture.\n"));
565                         mutex_unlock(&dev->lock);
566                         return -EINVAL;
567                 }
568                 vv->hflip = c->value;
569                 break;
570         case V4L2_CID_VFLIP:
571                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
572                         DEB_D(("V4L2_CID_VFLIP while active capture.\n"));
573                         mutex_unlock(&dev->lock);
574                         return -EINVAL;
575                 }
576                 vv->vflip = c->value;
577                 break;
578         default: {
579                 return -EINVAL;
580         }
581         }
582         mutex_unlock(&dev->lock);
583
584         if (IS_OVERLAY_ACTIVE(fh) != 0) {
585                 saa7146_stop_preview(fh);
586                 saa7146_start_preview(fh);
587         }
588         return 0;
589 }
590
591 /********************************************************************************/
592 /* common pagetable functions */
593
594 static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
595 {
596         struct pci_dev *pci = dev->pci;
597         struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
598         struct scatterlist *list = dma->sglist;
599         int length = dma->sglen;
600         struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
601
602         DEB_EE(("dev:%p, buf:%p, sg_len:%d\n",dev,buf,length));
603
604         if( 0 != IS_PLANAR(sfmt->trans)) {
605                 struct saa7146_pgtable *pt1 = &buf->pt[0];
606                 struct saa7146_pgtable *pt2 = &buf->pt[1];
607                 struct saa7146_pgtable *pt3 = &buf->pt[2];
608                 __le32  *ptr1, *ptr2, *ptr3;
609                 __le32 fill;
610
611                 int size = buf->fmt->width*buf->fmt->height;
612                 int i,p,m1,m2,m3,o1,o2;
613
614                 switch( sfmt->depth ) {
615                         case 12: {
616                                 /* create some offsets inside the page table */
617                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
618                                 m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
619                                 m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
620                                 o1 = size%PAGE_SIZE;
621                                 o2 = (size+(size/4))%PAGE_SIZE;
622                                 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
623                                 break;
624                         }
625                         case 16: {
626                                 /* create some offsets inside the page table */
627                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
628                                 m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
629                                 m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
630                                 o1 = size%PAGE_SIZE;
631                                 o2 = (size+(size/2))%PAGE_SIZE;
632                                 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
633                                 break;
634                         }
635                         default: {
636                                 return -1;
637                         }
638                 }
639
640                 ptr1 = pt1->cpu;
641                 ptr2 = pt2->cpu;
642                 ptr3 = pt3->cpu;
643
644                 /* walk all pages, copy all page addresses to ptr1 */
645                 for (i = 0; i < length; i++, list++) {
646                         for (p = 0; p * 4096 < list->length; p++, ptr1++) {
647                                 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
648                         }
649                 }
650 /*
651                 ptr1 = pt1->cpu;
652                 for(j=0;j<40;j++) {
653                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
654                 }
655 */
656
657                 /* if we have a user buffer, the first page may not be
658                    aligned to a page boundary. */
659                 pt1->offset = dma->sglist->offset;
660                 pt2->offset = pt1->offset+o1;
661                 pt3->offset = pt1->offset+o2;
662
663                 /* create video-dma2 page table */
664                 ptr1 = pt1->cpu;
665                 for(i = m1; i <= m2 ; i++, ptr2++) {
666                         *ptr2 = ptr1[i];
667                 }
668                 fill = *(ptr2-1);
669                 for(;i<1024;i++,ptr2++) {
670                         *ptr2 = fill;
671                 }
672                 /* create video-dma3 page table */
673                 ptr1 = pt1->cpu;
674                 for(i = m2; i <= m3; i++,ptr3++) {
675                         *ptr3 = ptr1[i];
676                 }
677                 fill = *(ptr3-1);
678                 for(;i<1024;i++,ptr3++) {
679                         *ptr3 = fill;
680                 }
681                 /* finally: finish up video-dma1 page table */
682                 ptr1 = pt1->cpu+m1;
683                 fill = pt1->cpu[m1];
684                 for(i=m1;i<1024;i++,ptr1++) {
685                         *ptr1 = fill;
686                 }
687 /*
688                 ptr1 = pt1->cpu;
689                 ptr2 = pt2->cpu;
690                 ptr3 = pt3->cpu;
691                 for(j=0;j<40;j++) {
692                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
693                 }
694                 for(j=0;j<40;j++) {
695                         printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
696                 }
697                 for(j=0;j<40;j++) {
698                         printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
699                 }
700 */
701         } else {
702                 struct saa7146_pgtable *pt = &buf->pt[0];
703                 return saa7146_pgtable_build_single(pci, pt, list, length);
704         }
705
706         return 0;
707 }
708
709
710 /********************************************************************************/
711 /* file operations */
712
713 static int video_begin(struct saa7146_fh *fh)
714 {
715         struct saa7146_dev *dev = fh->dev;
716         struct saa7146_vv *vv = dev->vv_data;
717         struct saa7146_format *fmt = NULL;
718         unsigned int resource;
719         int ret = 0, err = 0;
720
721         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
722
723         if ((vv->video_status & STATUS_CAPTURE) != 0) {
724                 if (vv->video_fh == fh) {
725                         DEB_S(("already capturing.\n"));
726                         return 0;
727                 }
728                 DEB_S(("already capturing in another open.\n"));
729                 return -EBUSY;
730         }
731
732         if ((vv->video_status & STATUS_OVERLAY) != 0) {
733                 DEB_S(("warning: suspending overlay video for streaming capture.\n"));
734                 vv->ov_suspend = vv->video_fh;
735                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
736                 if (0 != err) {
737                         DEB_D(("suspending video failed. aborting\n"));
738                         return err;
739                 }
740         }
741
742         fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
743         /* we need to have a valid format set here */
744         BUG_ON(NULL == fmt);
745
746         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
747                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
748         } else {
749                 resource = RESOURCE_DMA1_HPS;
750         }
751
752         ret = saa7146_res_get(fh, resource);
753         if (0 == ret) {
754                 DEB_S(("cannot get capture resource %d\n",resource));
755                 if (vv->ov_suspend != NULL) {
756                         saa7146_start_preview(vv->ov_suspend);
757                         vv->ov_suspend = NULL;
758                 }
759                 return -EBUSY;
760         }
761
762         /* clear out beginning of streaming bit (rps register 0)*/
763         saa7146_write(dev, MC2, MASK_27 );
764
765         /* enable rps0 irqs */
766         SAA7146_IER_ENABLE(dev, MASK_27);
767
768         vv->video_fh = fh;
769         vv->video_status = STATUS_CAPTURE;
770
771         return 0;
772 }
773
774 static int video_end(struct saa7146_fh *fh, struct file *file)
775 {
776         struct saa7146_dev *dev = fh->dev;
777         struct saa7146_vv *vv = dev->vv_data;
778         struct saa7146_format *fmt = NULL;
779         unsigned long flags;
780         unsigned int resource;
781         u32 dmas = 0;
782         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
783
784         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
785                 DEB_S(("not capturing.\n"));
786                 return 0;
787         }
788
789         if (vv->video_fh != fh) {
790                 DEB_S(("capturing, but in another open.\n"));
791                 return -EBUSY;
792         }
793
794         fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
795         /* we need to have a valid format set here */
796         BUG_ON(NULL == fmt);
797
798         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
799                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
800                 dmas = MASK_22 | MASK_21 | MASK_20;
801         } else {
802                 resource = RESOURCE_DMA1_HPS;
803                 dmas = MASK_22;
804         }
805         spin_lock_irqsave(&dev->slock,flags);
806
807         /* disable rps0  */
808         saa7146_write(dev, MC1, MASK_28);
809
810         /* disable rps0 irqs */
811         SAA7146_IER_DISABLE(dev, MASK_27);
812
813         /* shut down all used video dma transfers */
814         saa7146_write(dev, MC1, dmas);
815
816         spin_unlock_irqrestore(&dev->slock, flags);
817
818         vv->video_fh = NULL;
819         vv->video_status = 0;
820
821         saa7146_res_free(fh, resource);
822
823         if (vv->ov_suspend != NULL) {
824                 saa7146_start_preview(vv->ov_suspend);
825                 vv->ov_suspend = NULL;
826         }
827
828         return 0;
829 }
830
831 /*
832  * This function is _not_ called directly, but from
833  * video_generic_ioctl (and maybe others).  userspace
834  * copying is done already, arg is a kernel pointer.
835  */
836
837 long saa7146_video_do_ioctl(struct file *file, unsigned int cmd, void *arg)
838 {
839         struct saa7146_fh *fh  = file->private_data;
840         struct saa7146_dev *dev = fh->dev;
841         struct saa7146_vv *vv = dev->vv_data;
842
843         long err = 0;
844         int result = 0, ee = 0;
845
846         struct saa7146_use_ops *ops;
847         struct videobuf_queue *q;
848
849         /* check if extension handles the command */
850         for(ee = 0; dev->ext_vv_data->ioctls[ee].flags != 0; ee++) {
851                 if( cmd == dev->ext_vv_data->ioctls[ee].cmd )
852                         break;
853         }
854
855         if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_EXCLUSIVE) ) {
856                 DEB_D(("extension handles ioctl exclusive.\n"));
857                 result = dev->ext_vv_data->ioctl(fh, cmd, arg);
858                 return result;
859         }
860         if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_BEFORE) ) {
861                 DEB_D(("extension handles ioctl before.\n"));
862                 result = dev->ext_vv_data->ioctl(fh, cmd, arg);
863                 if( -EAGAIN != result ) {
864                         return result;
865                 }
866         }
867
868         /* fixme: add handle "after" case (is it still needed?) */
869
870         switch (fh->type) {
871         case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
872                 ops = &saa7146_video_uops;
873                 q = &fh->video_q;
874                 break;
875                 }
876         case V4L2_BUF_TYPE_VBI_CAPTURE: {
877                 ops = &saa7146_vbi_uops;
878                 q = &fh->vbi_q;
879                 break;
880                 }
881         default:
882                 BUG();
883                 return 0;
884         }
885
886         switch (cmd) {
887         case VIDIOC_QUERYCAP:
888         {
889                 struct v4l2_capability *cap = arg;
890                 memset(cap,0,sizeof(*cap));
891
892                 DEB_EE(("VIDIOC_QUERYCAP\n"));
893
894                 strcpy((char *)cap->driver, "saa7146 v4l2");
895                 strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
896                 sprintf((char *)cap->bus_info,"PCI:%s", pci_name(dev->pci));
897                 cap->version = SAA7146_VERSION_CODE;
898                 cap->capabilities =
899                         V4L2_CAP_VIDEO_CAPTURE |
900                         V4L2_CAP_VIDEO_OVERLAY |
901                         V4L2_CAP_READWRITE |
902                         V4L2_CAP_STREAMING;
903                 cap->capabilities |= dev->ext_vv_data->capabilities;
904                 return 0;
905         }
906         case VIDIOC_G_FBUF:
907         {
908                 struct v4l2_framebuffer *fb = arg;
909
910                 DEB_EE(("VIDIOC_G_FBUF\n"));
911
912                 *fb = vv->ov_fb;
913                 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
914                 return 0;
915         }
916         case VIDIOC_S_FBUF:
917         {
918                 struct v4l2_framebuffer *fb = arg;
919                 struct saa7146_format *fmt;
920
921                 DEB_EE(("VIDIOC_S_FBUF\n"));
922
923                 if(!capable(CAP_SYS_ADMIN) &&
924                    !capable(CAP_SYS_RAWIO))
925                         return -EPERM;
926
927                 /* check args */
928                 fmt = format_by_fourcc(dev,fb->fmt.pixelformat);
929                 if (NULL == fmt) {
930                         return -EINVAL;
931                 }
932
933                 /* planar formats are not allowed for overlay video, clipping and video dma would clash */
934                 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
935                         DEB_S(("planar pixelformat '%4.4s' not allowed for overlay\n",(char *)&fmt->pixelformat));
936                 }
937
938                 /* check if overlay is running */
939                 if (IS_OVERLAY_ACTIVE(fh) != 0) {
940                         if (vv->video_fh != fh) {
941                                 DEB_D(("refusing to change framebuffer informations while overlay is active in another open.\n"));
942                                 return -EBUSY;
943                         }
944                 }
945
946                 mutex_lock(&dev->lock);
947
948                 /* ok, accept it */
949                 vv->ov_fb = *fb;
950                 vv->ov_fmt = fmt;
951                 if (0 == vv->ov_fb.fmt.bytesperline)
952                         vv->ov_fb.fmt.bytesperline =
953                                 vv->ov_fb.fmt.width*fmt->depth/8;
954
955                 mutex_unlock(&dev->lock);
956
957                 return 0;
958         }
959         case VIDIOC_ENUM_FMT:
960         {
961                 struct v4l2_fmtdesc *f = arg;
962
963                 switch (f->type) {
964                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
965                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
966                         if (f->index >= NUM_FORMATS)
967                                 return -EINVAL;
968                         strlcpy((char *)f->description, formats[f->index].name,
969                                         sizeof(f->description));
970                         f->pixelformat = formats[f->index].pixelformat;
971                         f->flags = 0;
972                         memset(f->reserved, 0, sizeof(f->reserved));
973                         break;
974                 default:
975                         return -EINVAL;
976                 }
977
978                 DEB_EE(("VIDIOC_ENUM_FMT: type:%d, index:%d\n",f->type,f->index));
979                 return 0;
980         }
981         case VIDIOC_QUERYCTRL:
982         {
983                 const struct v4l2_queryctrl *ctrl;
984                 struct v4l2_queryctrl *c = arg;
985
986                 if ((c->id <  V4L2_CID_BASE ||
987                      c->id >= V4L2_CID_LASTP1) &&
988                     (c->id <  V4L2_CID_PRIVATE_BASE ||
989                      c->id >= V4L2_CID_PRIVATE_LASTP1))
990                         return -EINVAL;
991
992                 ctrl = ctrl_by_id(c->id);
993                 if( NULL == ctrl ) {
994                         return -EINVAL;
995 /*
996                         c->flags = V4L2_CTRL_FLAG_DISABLED;
997                         return 0;
998 */
999                 }
1000
1001                 DEB_EE(("VIDIOC_QUERYCTRL: id:%d\n",c->id));
1002                 *c = *ctrl;
1003                 return 0;
1004         }
1005         case VIDIOC_G_CTRL: {
1006                 DEB_EE(("VIDIOC_G_CTRL\n"));
1007                 return get_control(fh,arg);
1008         }
1009         case VIDIOC_S_CTRL:
1010         {
1011                 DEB_EE(("VIDIOC_S_CTRL\n"));
1012                 err = set_control(fh,arg);
1013                 return err;
1014         }
1015         case VIDIOC_G_PARM:
1016         {
1017                 struct v4l2_streamparm *parm = arg;
1018                 if( parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ) {
1019                         return -EINVAL;
1020                 }
1021                 memset(&parm->parm.capture,0,sizeof(struct v4l2_captureparm));
1022                 parm->parm.capture.readbuffers = 1;
1023                 // fixme: only for PAL!
1024                 parm->parm.capture.timeperframe.numerator = 1;
1025                 parm->parm.capture.timeperframe.denominator = 25;
1026                 return 0;
1027         }
1028         case VIDIOC_G_FMT:
1029         {
1030                 struct v4l2_format *f = arg;
1031                 DEB_EE(("VIDIOC_G_FMT\n"));
1032                 return g_fmt(fh,f);
1033         }
1034         case VIDIOC_S_FMT:
1035         {
1036                 struct v4l2_format *f = arg;
1037                 DEB_EE(("VIDIOC_S_FMT\n"));
1038                 return s_fmt(fh,f);
1039         }
1040         case VIDIOC_TRY_FMT:
1041         {
1042                 struct v4l2_format *f = arg;
1043                 DEB_EE(("VIDIOC_TRY_FMT\n"));
1044                 return try_fmt(fh,f);
1045         }
1046         case VIDIOC_G_STD:
1047         {
1048                 v4l2_std_id *id = arg;
1049                 DEB_EE(("VIDIOC_G_STD\n"));
1050                 *id = vv->standard->id;
1051                 return 0;
1052         }
1053         /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
1054            PAL / NTSC / SECAM. if your hardware does not (or does more)
1055            -- override this function in your extension */
1056         case VIDIOC_ENUMSTD:
1057         {
1058                 struct v4l2_standard *e = arg;
1059                 if (e->index < 0 )
1060                         return -EINVAL;
1061                 if( e->index < dev->ext_vv_data->num_stds ) {
1062                         DEB_EE(("VIDIOC_ENUMSTD: index:%d\n",e->index));
1063                         v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
1064                         return 0;
1065                 }
1066                 return -EINVAL;
1067         }
1068         case VIDIOC_S_STD:
1069         {
1070                 v4l2_std_id *id = arg;
1071                 int found = 0;
1072                 int i;
1073
1074                 DEB_EE(("VIDIOC_S_STD\n"));
1075
1076                 if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
1077                         DEB_D(("cannot change video standard while streaming capture is active\n"));
1078                         return -EBUSY;
1079                 }
1080
1081                 if ((vv->video_status & STATUS_OVERLAY) != 0) {
1082                         vv->ov_suspend = vv->video_fh;
1083                         err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
1084                         if (0 != err) {
1085                                 DEB_D(("suspending video failed. aborting\n"));
1086                                 return err;
1087                         }
1088                 }
1089
1090                 mutex_lock(&dev->lock);
1091
1092                 for(i = 0; i < dev->ext_vv_data->num_stds; i++)
1093                         if (*id & dev->ext_vv_data->stds[i].id)
1094                                 break;
1095                 if (i != dev->ext_vv_data->num_stds) {
1096                         vv->standard = &dev->ext_vv_data->stds[i];
1097                         if( NULL != dev->ext_vv_data->std_callback )
1098                                 dev->ext_vv_data->std_callback(dev, vv->standard);
1099                         found = 1;
1100                 }
1101
1102                 mutex_unlock(&dev->lock);
1103
1104                 if (vv->ov_suspend != NULL) {
1105                         saa7146_start_preview(vv->ov_suspend);
1106                         vv->ov_suspend = NULL;
1107                 }
1108
1109                 if( 0 == found ) {
1110                         DEB_EE(("VIDIOC_S_STD: standard not found.\n"));
1111                         return -EINVAL;
1112                 }
1113
1114                 DEB_EE(("VIDIOC_S_STD: set to standard to '%s'\n",vv->standard->name));
1115                 return 0;
1116         }
1117         case VIDIOC_OVERLAY:
1118         {
1119                 int on = *(int *)arg;
1120
1121                 DEB_D(("VIDIOC_OVERLAY on:%d\n",on));
1122                 if (on != 0) {
1123                         err = saa7146_start_preview(fh);
1124                 } else {
1125                         err = saa7146_stop_preview(fh);
1126                 }
1127                 return err;
1128         }
1129         case VIDIOC_REQBUFS: {
1130                 struct v4l2_requestbuffers *req = arg;
1131                 DEB_D(("VIDIOC_REQBUFS, type:%d\n",req->type));
1132                 return videobuf_reqbufs(q,req);
1133         }
1134         case VIDIOC_QUERYBUF: {
1135                 struct v4l2_buffer *buf = arg;
1136                 DEB_D(("VIDIOC_QUERYBUF, type:%d, offset:%d\n",buf->type,buf->m.offset));
1137                 return videobuf_querybuf(q,buf);
1138         }
1139         case VIDIOC_QBUF: {
1140                 struct v4l2_buffer *buf = arg;
1141                 int ret = 0;
1142                 ret = videobuf_qbuf(q,buf);
1143                 DEB_D(("VIDIOC_QBUF: ret:%d, index:%d\n",ret,buf->index));
1144                 return ret;
1145         }
1146         case VIDIOC_DQBUF: {
1147                 struct v4l2_buffer *buf = arg;
1148                 int ret = 0;
1149                 ret = videobuf_dqbuf(q,buf,file->f_flags & O_NONBLOCK);
1150                 DEB_D(("VIDIOC_DQBUF: ret:%d, index:%d\n",ret,buf->index));
1151                 return ret;
1152         }
1153         case VIDIOC_STREAMON: {
1154                 int *type = arg;
1155                 DEB_D(("VIDIOC_STREAMON, type:%d\n",*type));
1156
1157                 err = video_begin(fh);
1158                 if( 0 != err) {
1159                         return err;
1160                 }
1161                 err = videobuf_streamon(q);
1162                 return err;
1163         }
1164         case VIDIOC_STREAMOFF: {
1165                 int *type = arg;
1166
1167                 DEB_D(("VIDIOC_STREAMOFF, type:%d\n",*type));
1168
1169                 /* ugly: we need to copy some checks from video_end(),
1170                    because videobuf_streamoff() relies on the capture running.
1171                    check and fix this */
1172                 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
1173                         DEB_S(("not capturing.\n"));
1174                         return 0;
1175                 }
1176
1177                 if (vv->video_fh != fh) {
1178                         DEB_S(("capturing, but in another open.\n"));
1179                         return -EBUSY;
1180                 }
1181
1182                 err = videobuf_streamoff(q);
1183                 if (0 != err) {
1184                         DEB_D(("warning: videobuf_streamoff() failed.\n"));
1185                         video_end(fh, file);
1186                 } else {
1187                         err = video_end(fh, file);
1188                 }
1189                 return err;
1190         }
1191 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1192         case VIDIOCGMBUF:
1193         {
1194                 struct video_mbuf *mbuf = arg;
1195                 int i;
1196
1197                 /* fixme: number of capture buffers and sizes for v4l apps */
1198                 int gbuffers = 2;
1199                 int gbufsize = 768*576*4;
1200
1201                 DEB_D(("VIDIOCGMBUF \n"));
1202
1203                 q = &fh->video_q;
1204                 err = videobuf_mmap_setup(q,gbuffers,gbufsize,
1205                                           V4L2_MEMORY_MMAP);
1206                 if (err < 0)
1207                         return err;
1208
1209                 gbuffers = err;
1210                 memset(mbuf,0,sizeof(*mbuf));
1211                 mbuf->frames = gbuffers;
1212                 mbuf->size   = gbuffers * gbufsize;
1213                 for (i = 0; i < gbuffers; i++)
1214                         mbuf->offsets[i] = i * gbufsize;
1215                 return 0;
1216         }
1217 #endif
1218         default:
1219                 return v4l_compat_translate_ioctl(file, cmd, arg,
1220                                                   saa7146_video_do_ioctl);
1221         }
1222         return 0;
1223 }
1224
1225 /*********************************************************************************/
1226 /* buffer handling functions                                                  */
1227
1228 static int buffer_activate (struct saa7146_dev *dev,
1229                      struct saa7146_buf *buf,
1230                      struct saa7146_buf *next)
1231 {
1232         struct saa7146_vv *vv = dev->vv_data;
1233
1234         buf->vb.state = VIDEOBUF_ACTIVE;
1235         saa7146_set_capture(dev,buf,next);
1236
1237         mod_timer(&vv->video_q.timeout, jiffies+BUFFER_TIMEOUT);
1238         return 0;
1239 }
1240
1241 static int buffer_prepare(struct videobuf_queue *q,
1242                           struct videobuf_buffer *vb, enum v4l2_field field)
1243 {
1244         struct file *file = q->priv_data;
1245         struct saa7146_fh *fh = file->private_data;
1246         struct saa7146_dev *dev = fh->dev;
1247         struct saa7146_vv *vv = dev->vv_data;
1248         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1249         int size,err = 0;
1250
1251         DEB_CAP(("vbuf:%p\n",vb));
1252
1253         /* sanity checks */
1254         if (fh->video_fmt.width  < 48 ||
1255             fh->video_fmt.height < 32 ||
1256             fh->video_fmt.width  > vv->standard->h_max_out ||
1257             fh->video_fmt.height > vv->standard->v_max_out) {
1258                 DEB_D(("w (%d) / h (%d) out of bounds.\n",fh->video_fmt.width,fh->video_fmt.height));
1259                 return -EINVAL;
1260         }
1261
1262         size = fh->video_fmt.sizeimage;
1263         if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1264                 DEB_D(("size mismatch.\n"));
1265                 return -EINVAL;
1266         }
1267
1268         DEB_CAP(("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1269                 fh->video_fmt.width,fh->video_fmt.height,size,v4l2_field_names[fh->video_fmt.field]));
1270         if (buf->vb.width  != fh->video_fmt.width  ||
1271             buf->vb.bytesperline != fh->video_fmt.bytesperline ||
1272             buf->vb.height != fh->video_fmt.height ||
1273             buf->vb.size   != size ||
1274             buf->vb.field  != field      ||
1275             buf->vb.field  != fh->video_fmt.field  ||
1276             buf->fmt       != &fh->video_fmt) {
1277                 saa7146_dma_free(dev,q,buf);
1278         }
1279
1280         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1281                 struct saa7146_format *sfmt;
1282
1283                 buf->vb.bytesperline  = fh->video_fmt.bytesperline;
1284                 buf->vb.width  = fh->video_fmt.width;
1285                 buf->vb.height = fh->video_fmt.height;
1286                 buf->vb.size   = size;
1287                 buf->vb.field  = field;
1288                 buf->fmt       = &fh->video_fmt;
1289                 buf->vb.field  = fh->video_fmt.field;
1290
1291                 sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
1292
1293                 if( 0 != IS_PLANAR(sfmt->trans)) {
1294                         saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1295                         saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1296                         saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1297
1298                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1299                         saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1300                         saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1301                 } else {
1302                         saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1303                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1304                 }
1305
1306                 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1307                 if (err)
1308                         goto oops;
1309                 err = saa7146_pgtable_build(dev,buf);
1310                 if (err)
1311                         goto oops;
1312         }
1313         buf->vb.state = VIDEOBUF_PREPARED;
1314         buf->activate = buffer_activate;
1315
1316         return 0;
1317
1318  oops:
1319         DEB_D(("error out.\n"));
1320         saa7146_dma_free(dev,q,buf);
1321
1322         return err;
1323 }
1324
1325 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1326 {
1327         struct file *file = q->priv_data;
1328         struct saa7146_fh *fh = file->private_data;
1329
1330         if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1331                 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1332
1333         *size = fh->video_fmt.sizeimage;
1334
1335         /* check if we exceed the "max_memory" parameter */
1336         if( (*count * *size) > (max_memory*1048576) ) {
1337                 *count = (max_memory*1048576) / *size;
1338         }
1339
1340         DEB_CAP(("%d buffers, %d bytes each.\n",*count,*size));
1341
1342         return 0;
1343 }
1344
1345 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1346 {
1347         struct file *file = q->priv_data;
1348         struct saa7146_fh *fh = file->private_data;
1349         struct saa7146_dev *dev = fh->dev;
1350         struct saa7146_vv *vv = dev->vv_data;
1351         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1352
1353         DEB_CAP(("vbuf:%p\n",vb));
1354         saa7146_buffer_queue(fh->dev,&vv->video_q,buf);
1355 }
1356
1357 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1358 {
1359         struct file *file = q->priv_data;
1360         struct saa7146_fh *fh = file->private_data;
1361         struct saa7146_dev *dev = fh->dev;
1362         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1363
1364         DEB_CAP(("vbuf:%p\n",vb));
1365         saa7146_dma_free(dev,q,buf);
1366 }
1367
1368 static struct videobuf_queue_ops video_qops = {
1369         .buf_setup    = buffer_setup,
1370         .buf_prepare  = buffer_prepare,
1371         .buf_queue    = buffer_queue,
1372         .buf_release  = buffer_release,
1373 };
1374
1375 /********************************************************************************/
1376 /* file operations */
1377
1378 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1379 {
1380         INIT_LIST_HEAD(&vv->video_q.queue);
1381
1382         init_timer(&vv->video_q.timeout);
1383         vv->video_q.timeout.function = saa7146_buffer_timeout;
1384         vv->video_q.timeout.data     = (unsigned long)(&vv->video_q);
1385         vv->video_q.dev              = dev;
1386
1387         /* set some default values */
1388         vv->standard = &dev->ext_vv_data->stds[0];
1389
1390         /* FIXME: what's this? */
1391         vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1392         vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1393 }
1394
1395
1396 static int video_open(struct saa7146_dev *dev, struct file *file)
1397 {
1398         struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1399         struct saa7146_format *sfmt;
1400
1401         fh->video_fmt.width = 384;
1402         fh->video_fmt.height = 288;
1403         fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24;
1404         fh->video_fmt.bytesperline = 0;
1405         fh->video_fmt.field = V4L2_FIELD_ANY;
1406         sfmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
1407         fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8;
1408
1409         videobuf_queue_sg_init(&fh->video_q, &video_qops,
1410                             &dev->pci->dev, &dev->slock,
1411                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
1412                             V4L2_FIELD_INTERLACED,
1413                             sizeof(struct saa7146_buf),
1414                             file);
1415
1416         return 0;
1417 }
1418
1419
1420 static void video_close(struct saa7146_dev *dev, struct file *file)
1421 {
1422         struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1423         struct saa7146_vv *vv = dev->vv_data;
1424         struct videobuf_queue *q = &fh->video_q;
1425         int err;
1426
1427         if (IS_CAPTURE_ACTIVE(fh) != 0) {
1428                 err = video_end(fh, file);
1429         } else if (IS_OVERLAY_ACTIVE(fh) != 0) {
1430                 err = saa7146_stop_preview(fh);
1431         }
1432
1433         videobuf_stop(q);
1434
1435         /* hmm, why is this function declared void? */
1436         /* return err */
1437 }
1438
1439
1440 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1441 {
1442         struct saa7146_vv *vv = dev->vv_data;
1443         struct saa7146_dmaqueue *q = &vv->video_q;
1444
1445         spin_lock(&dev->slock);
1446         DEB_CAP(("called.\n"));
1447
1448         /* only finish the buffer if we have one... */
1449         if( NULL != q->curr ) {
1450                 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1451         }
1452         saa7146_buffer_next(dev,q,0);
1453
1454         spin_unlock(&dev->slock);
1455 }
1456
1457 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1458 {
1459         struct saa7146_fh *fh = file->private_data;
1460         struct saa7146_dev *dev = fh->dev;
1461         struct saa7146_vv *vv = dev->vv_data;
1462         ssize_t ret = 0;
1463
1464         DEB_EE(("called.\n"));
1465
1466         if ((vv->video_status & STATUS_CAPTURE) != 0) {
1467                 /* fixme: should we allow read() captures while streaming capture? */
1468                 if (vv->video_fh == fh) {
1469                         DEB_S(("already capturing.\n"));
1470                         return -EBUSY;
1471                 }
1472                 DEB_S(("already capturing in another open.\n"));
1473                 return -EBUSY;
1474         }
1475
1476         ret = video_begin(fh);
1477         if( 0 != ret) {
1478                 goto out;
1479         }
1480
1481         ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1482                                 file->f_flags & O_NONBLOCK);
1483         if (ret != 0) {
1484                 video_end(fh, file);
1485         } else {
1486                 ret = video_end(fh, file);
1487         }
1488 out:
1489         /* restart overlay if it was active before */
1490         if (vv->ov_suspend != NULL) {
1491                 saa7146_start_preview(vv->ov_suspend);
1492                 vv->ov_suspend = NULL;
1493         }
1494
1495         return ret;
1496 }
1497
1498 struct saa7146_use_ops saa7146_video_uops = {
1499         .init = video_init,
1500         .open = video_open,
1501         .release = video_close,
1502         .irq_done = video_irq_done,
1503         .read = video_read,
1504 };