V4L/DVB: radio: add support for SAA7706H Car Radio DSP
[linux-2.6.git] / drivers / media / common / saa7146_video.c
1 #include <media/saa7146_vv.h>
2 #include <media/v4l2-chip-ident.h>
3
4 static int max_memory = 32;
5
6 module_param(max_memory, int, 0644);
7 MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)");
8
9 #define IS_CAPTURE_ACTIVE(fh) \
10         (((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh))
11
12 #define IS_OVERLAY_ACTIVE(fh) \
13         (((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh))
14
15 /* format descriptions for capture and preview */
16 static struct saa7146_format formats[] = {
17         {
18                 .name           = "RGB-8 (3-3-2)",
19                 .pixelformat    = V4L2_PIX_FMT_RGB332,
20                 .trans          = RGB08_COMPOSED,
21                 .depth          = 8,
22                 .flags          = 0,
23         }, {
24                 .name           = "RGB-16 (5/B-6/G-5/R)",
25                 .pixelformat    = V4L2_PIX_FMT_RGB565,
26                 .trans          = RGB16_COMPOSED,
27                 .depth          = 16,
28                 .flags          = 0,
29         }, {
30                 .name           = "RGB-24 (B-G-R)",
31                 .pixelformat    = V4L2_PIX_FMT_BGR24,
32                 .trans          = RGB24_COMPOSED,
33                 .depth          = 24,
34                 .flags          = 0,
35         }, {
36                 .name           = "RGB-32 (B-G-R)",
37                 .pixelformat    = V4L2_PIX_FMT_BGR32,
38                 .trans          = RGB32_COMPOSED,
39                 .depth          = 32,
40                 .flags          = 0,
41         }, {
42                 .name           = "RGB-32 (R-G-B)",
43                 .pixelformat    = V4L2_PIX_FMT_RGB32,
44                 .trans          = RGB32_COMPOSED,
45                 .depth          = 32,
46                 .flags          = 0,
47                 .swap           = 0x2,
48         }, {
49                 .name           = "Greyscale-8",
50                 .pixelformat    = V4L2_PIX_FMT_GREY,
51                 .trans          = Y8,
52                 .depth          = 8,
53                 .flags          = 0,
54         }, {
55                 .name           = "YUV 4:2:2 planar (Y-Cb-Cr)",
56                 .pixelformat    = V4L2_PIX_FMT_YUV422P,
57                 .trans          = YUV422_DECOMPOSED,
58                 .depth          = 16,
59                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
60         }, {
61                 .name           = "YVU 4:2:0 planar (Y-Cb-Cr)",
62                 .pixelformat    = V4L2_PIX_FMT_YVU420,
63                 .trans          = YUV420_DECOMPOSED,
64                 .depth          = 12,
65                 .flags          = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
66         }, {
67                 .name           = "YUV 4:2:0 planar (Y-Cb-Cr)",
68                 .pixelformat    = V4L2_PIX_FMT_YUV420,
69                 .trans          = YUV420_DECOMPOSED,
70                 .depth          = 12,
71                 .flags          = FORMAT_IS_PLANAR,
72         }, {
73                 .name           = "YUV 4:2:2 (U-Y-V-Y)",
74                 .pixelformat    = V4L2_PIX_FMT_UYVY,
75                 .trans          = YUV422_COMPOSED,
76                 .depth          = 16,
77                 .flags          = 0,
78         }
79 };
80
81 /* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps.
82    due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped
83    (like V4L2_PIX_FMT_YUYV) ... 8-( */
84
85 static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
86
87 struct saa7146_format* format_by_fourcc(struct saa7146_dev *dev, int fourcc)
88 {
89         int i, j = NUM_FORMATS;
90
91         for (i = 0; i < j; i++) {
92                 if (formats[i].pixelformat == fourcc) {
93                         return formats+i;
94                 }
95         }
96
97         DEB_D(("unknown pixelformat:'%4.4s'\n",(char *)&fourcc));
98         return NULL;
99 }
100
101 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f);
102
103 int saa7146_start_preview(struct saa7146_fh *fh)
104 {
105         struct saa7146_dev *dev = fh->dev;
106         struct saa7146_vv *vv = dev->vv_data;
107         struct v4l2_format fmt;
108         int ret = 0, err = 0;
109
110         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
111
112         /* check if we have overlay informations */
113         if( NULL == fh->ov.fh ) {
114                 DEB_D(("no overlay data available. try S_FMT first.\n"));
115                 return -EAGAIN;
116         }
117
118         /* check if streaming capture is running */
119         if (IS_CAPTURE_ACTIVE(fh) != 0) {
120                 DEB_D(("streaming capture is active.\n"));
121                 return -EBUSY;
122         }
123
124         /* check if overlay is running */
125         if (IS_OVERLAY_ACTIVE(fh) != 0) {
126                 if (vv->video_fh == fh) {
127                         DEB_D(("overlay is already active.\n"));
128                         return 0;
129                 }
130                 DEB_D(("overlay is already active in another open.\n"));
131                 return -EBUSY;
132         }
133
134         if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
135                 DEB_D(("cannot get necessary overlay resources\n"));
136                 return -EBUSY;
137         }
138
139         fmt.fmt.win = fh->ov.win;
140         err = vidioc_try_fmt_vid_overlay(NULL, fh, &fmt);
141         if (0 != err) {
142                 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
143                 return -EBUSY;
144         }
145         fh->ov.win = fmt.fmt.win;
146         vv->ov_data = &fh->ov;
147
148         DEB_D(("%dx%d+%d+%d %s field=%s\n",
149                 fh->ov.win.w.width,fh->ov.win.w.height,
150                 fh->ov.win.w.left,fh->ov.win.w.top,
151                 vv->ov_fmt->name,v4l2_field_names[fh->ov.win.field]));
152
153         if (0 != (ret = saa7146_enable_overlay(fh))) {
154                 DEB_D(("enabling overlay failed: %d\n",ret));
155                 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
156                 return ret;
157         }
158
159         vv->video_status = STATUS_OVERLAY;
160         vv->video_fh = fh;
161
162         return 0;
163 }
164 EXPORT_SYMBOL_GPL(saa7146_start_preview);
165
166 int saa7146_stop_preview(struct saa7146_fh *fh)
167 {
168         struct saa7146_dev *dev = fh->dev;
169         struct saa7146_vv *vv = dev->vv_data;
170
171         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
172
173         /* check if streaming capture is running */
174         if (IS_CAPTURE_ACTIVE(fh) != 0) {
175                 DEB_D(("streaming capture is active.\n"));
176                 return -EBUSY;
177         }
178
179         /* check if overlay is running at all */
180         if ((vv->video_status & STATUS_OVERLAY) == 0) {
181                 DEB_D(("no active overlay.\n"));
182                 return 0;
183         }
184
185         if (vv->video_fh != fh) {
186                 DEB_D(("overlay is active, but in another open.\n"));
187                 return -EBUSY;
188         }
189
190         vv->video_status = 0;
191         vv->video_fh = NULL;
192
193         saa7146_disable_overlay(fh);
194
195         saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
196
197         return 0;
198 }
199 EXPORT_SYMBOL_GPL(saa7146_stop_preview);
200
201 /********************************************************************************/
202 /* device controls */
203
204 static struct v4l2_queryctrl controls[] = {
205         {
206                 .id             = V4L2_CID_BRIGHTNESS,
207                 .name           = "Brightness",
208                 .minimum        = 0,
209                 .maximum        = 255,
210                 .step           = 1,
211                 .default_value  = 128,
212                 .type           = V4L2_CTRL_TYPE_INTEGER,
213                 .flags          = V4L2_CTRL_FLAG_SLIDER,
214         },{
215                 .id             = V4L2_CID_CONTRAST,
216                 .name           = "Contrast",
217                 .minimum        = 0,
218                 .maximum        = 127,
219                 .step           = 1,
220                 .default_value  = 64,
221                 .type           = V4L2_CTRL_TYPE_INTEGER,
222                 .flags          = V4L2_CTRL_FLAG_SLIDER,
223         },{
224                 .id             = V4L2_CID_SATURATION,
225                 .name           = "Saturation",
226                 .minimum        = 0,
227                 .maximum        = 127,
228                 .step           = 1,
229                 .default_value  = 64,
230                 .type           = V4L2_CTRL_TYPE_INTEGER,
231                 .flags          = V4L2_CTRL_FLAG_SLIDER,
232         },{
233                 .id             = V4L2_CID_VFLIP,
234                 .name           = "Vertical Flip",
235                 .minimum        = 0,
236                 .maximum        = 1,
237                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
238         },{
239                 .id             = V4L2_CID_HFLIP,
240                 .name           = "Horizontal Flip",
241                 .minimum        = 0,
242                 .maximum        = 1,
243                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
244         },
245 };
246 static int NUM_CONTROLS = sizeof(controls)/sizeof(struct v4l2_queryctrl);
247
248 #define V4L2_CID_PRIVATE_LASTP1      (V4L2_CID_PRIVATE_BASE + 0)
249
250 static struct v4l2_queryctrl* ctrl_by_id(int id)
251 {
252         int i;
253
254         for (i = 0; i < NUM_CONTROLS; i++)
255                 if (controls[i].id == id)
256                         return controls+i;
257         return NULL;
258 }
259
260 /********************************************************************************/
261 /* common pagetable functions */
262
263 static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
264 {
265         struct pci_dev *pci = dev->pci;
266         struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
267         struct scatterlist *list = dma->sglist;
268         int length = dma->sglen;
269         struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
270
271         DEB_EE(("dev:%p, buf:%p, sg_len:%d\n",dev,buf,length));
272
273         if( 0 != IS_PLANAR(sfmt->trans)) {
274                 struct saa7146_pgtable *pt1 = &buf->pt[0];
275                 struct saa7146_pgtable *pt2 = &buf->pt[1];
276                 struct saa7146_pgtable *pt3 = &buf->pt[2];
277                 __le32  *ptr1, *ptr2, *ptr3;
278                 __le32 fill;
279
280                 int size = buf->fmt->width*buf->fmt->height;
281                 int i,p,m1,m2,m3,o1,o2;
282
283                 switch( sfmt->depth ) {
284                         case 12: {
285                                 /* create some offsets inside the page table */
286                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
287                                 m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
288                                 m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
289                                 o1 = size%PAGE_SIZE;
290                                 o2 = (size+(size/4))%PAGE_SIZE;
291                                 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
292                                 break;
293                         }
294                         case 16: {
295                                 /* create some offsets inside the page table */
296                                 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
297                                 m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
298                                 m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
299                                 o1 = size%PAGE_SIZE;
300                                 o2 = (size+(size/2))%PAGE_SIZE;
301                                 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
302                                 break;
303                         }
304                         default: {
305                                 return -1;
306                         }
307                 }
308
309                 ptr1 = pt1->cpu;
310                 ptr2 = pt2->cpu;
311                 ptr3 = pt3->cpu;
312
313                 /* walk all pages, copy all page addresses to ptr1 */
314                 for (i = 0; i < length; i++, list++) {
315                         for (p = 0; p * 4096 < list->length; p++, ptr1++) {
316                                 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
317                         }
318                 }
319 /*
320                 ptr1 = pt1->cpu;
321                 for(j=0;j<40;j++) {
322                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
323                 }
324 */
325
326                 /* if we have a user buffer, the first page may not be
327                    aligned to a page boundary. */
328                 pt1->offset = dma->sglist->offset;
329                 pt2->offset = pt1->offset+o1;
330                 pt3->offset = pt1->offset+o2;
331
332                 /* create video-dma2 page table */
333                 ptr1 = pt1->cpu;
334                 for(i = m1; i <= m2 ; i++, ptr2++) {
335                         *ptr2 = ptr1[i];
336                 }
337                 fill = *(ptr2-1);
338                 for(;i<1024;i++,ptr2++) {
339                         *ptr2 = fill;
340                 }
341                 /* create video-dma3 page table */
342                 ptr1 = pt1->cpu;
343                 for(i = m2; i <= m3; i++,ptr3++) {
344                         *ptr3 = ptr1[i];
345                 }
346                 fill = *(ptr3-1);
347                 for(;i<1024;i++,ptr3++) {
348                         *ptr3 = fill;
349                 }
350                 /* finally: finish up video-dma1 page table */
351                 ptr1 = pt1->cpu+m1;
352                 fill = pt1->cpu[m1];
353                 for(i=m1;i<1024;i++,ptr1++) {
354                         *ptr1 = fill;
355                 }
356 /*
357                 ptr1 = pt1->cpu;
358                 ptr2 = pt2->cpu;
359                 ptr3 = pt3->cpu;
360                 for(j=0;j<40;j++) {
361                         printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
362                 }
363                 for(j=0;j<40;j++) {
364                         printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
365                 }
366                 for(j=0;j<40;j++) {
367                         printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
368                 }
369 */
370         } else {
371                 struct saa7146_pgtable *pt = &buf->pt[0];
372                 return saa7146_pgtable_build_single(pci, pt, list, length);
373         }
374
375         return 0;
376 }
377
378
379 /********************************************************************************/
380 /* file operations */
381
382 static int video_begin(struct saa7146_fh *fh)
383 {
384         struct saa7146_dev *dev = fh->dev;
385         struct saa7146_vv *vv = dev->vv_data;
386         struct saa7146_format *fmt = NULL;
387         unsigned int resource;
388         int ret = 0, err = 0;
389
390         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
391
392         if ((vv->video_status & STATUS_CAPTURE) != 0) {
393                 if (vv->video_fh == fh) {
394                         DEB_S(("already capturing.\n"));
395                         return 0;
396                 }
397                 DEB_S(("already capturing in another open.\n"));
398                 return -EBUSY;
399         }
400
401         if ((vv->video_status & STATUS_OVERLAY) != 0) {
402                 DEB_S(("warning: suspending overlay video for streaming capture.\n"));
403                 vv->ov_suspend = vv->video_fh;
404                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
405                 if (0 != err) {
406                         DEB_D(("suspending video failed. aborting\n"));
407                         return err;
408                 }
409         }
410
411         fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
412         /* we need to have a valid format set here */
413         BUG_ON(NULL == fmt);
414
415         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
416                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
417         } else {
418                 resource = RESOURCE_DMA1_HPS;
419         }
420
421         ret = saa7146_res_get(fh, resource);
422         if (0 == ret) {
423                 DEB_S(("cannot get capture resource %d\n",resource));
424                 if (vv->ov_suspend != NULL) {
425                         saa7146_start_preview(vv->ov_suspend);
426                         vv->ov_suspend = NULL;
427                 }
428                 return -EBUSY;
429         }
430
431         /* clear out beginning of streaming bit (rps register 0)*/
432         saa7146_write(dev, MC2, MASK_27 );
433
434         /* enable rps0 irqs */
435         SAA7146_IER_ENABLE(dev, MASK_27);
436
437         vv->video_fh = fh;
438         vv->video_status = STATUS_CAPTURE;
439
440         return 0;
441 }
442
443 static int video_end(struct saa7146_fh *fh, struct file *file)
444 {
445         struct saa7146_dev *dev = fh->dev;
446         struct saa7146_vv *vv = dev->vv_data;
447         struct saa7146_format *fmt = NULL;
448         unsigned long flags;
449         unsigned int resource;
450         u32 dmas = 0;
451         DEB_EE(("dev:%p, fh:%p\n",dev,fh));
452
453         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
454                 DEB_S(("not capturing.\n"));
455                 return 0;
456         }
457
458         if (vv->video_fh != fh) {
459                 DEB_S(("capturing, but in another open.\n"));
460                 return -EBUSY;
461         }
462
463         fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
464         /* we need to have a valid format set here */
465         BUG_ON(NULL == fmt);
466
467         if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
468                 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
469                 dmas = MASK_22 | MASK_21 | MASK_20;
470         } else {
471                 resource = RESOURCE_DMA1_HPS;
472                 dmas = MASK_22;
473         }
474         spin_lock_irqsave(&dev->slock,flags);
475
476         /* disable rps0  */
477         saa7146_write(dev, MC1, MASK_28);
478
479         /* disable rps0 irqs */
480         SAA7146_IER_DISABLE(dev, MASK_27);
481
482         /* shut down all used video dma transfers */
483         saa7146_write(dev, MC1, dmas);
484
485         spin_unlock_irqrestore(&dev->slock, flags);
486
487         vv->video_fh = NULL;
488         vv->video_status = 0;
489
490         saa7146_res_free(fh, resource);
491
492         if (vv->ov_suspend != NULL) {
493                 saa7146_start_preview(vv->ov_suspend);
494                 vv->ov_suspend = NULL;
495         }
496
497         return 0;
498 }
499
500 static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
501 {
502         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
503
504         strcpy((char *)cap->driver, "saa7146 v4l2");
505         strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
506         sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci));
507         cap->version = SAA7146_VERSION_CODE;
508         cap->capabilities =
509                 V4L2_CAP_VIDEO_CAPTURE |
510                 V4L2_CAP_VIDEO_OVERLAY |
511                 V4L2_CAP_READWRITE |
512                 V4L2_CAP_STREAMING;
513         cap->capabilities |= dev->ext_vv_data->capabilities;
514         return 0;
515 }
516
517 static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
518 {
519         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
520         struct saa7146_vv *vv = dev->vv_data;
521
522         *fb = vv->ov_fb;
523         fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
524         return 0;
525 }
526
527 static int vidioc_s_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
528 {
529         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
530         struct saa7146_vv *vv = dev->vv_data;
531         struct saa7146_format *fmt;
532
533         DEB_EE(("VIDIOC_S_FBUF\n"));
534
535         if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
536                 return -EPERM;
537
538         /* check args */
539         fmt = format_by_fourcc(dev, fb->fmt.pixelformat);
540         if (NULL == fmt)
541                 return -EINVAL;
542
543         /* planar formats are not allowed for overlay video, clipping and video dma would clash */
544         if (fmt->flags & FORMAT_IS_PLANAR)
545                 DEB_S(("planar pixelformat '%4.4s' not allowed for overlay\n",
546                                         (char *)&fmt->pixelformat));
547
548         /* check if overlay is running */
549         if (IS_OVERLAY_ACTIVE(fh) != 0) {
550                 if (vv->video_fh != fh) {
551                         DEB_D(("refusing to change framebuffer informations while overlay is active in another open.\n"));
552                         return -EBUSY;
553                 }
554         }
555
556         mutex_lock(&dev->lock);
557
558         /* ok, accept it */
559         vv->ov_fb = *fb;
560         vv->ov_fmt = fmt;
561         if (0 == vv->ov_fb.fmt.bytesperline)
562                 vv->ov_fb.fmt.bytesperline =
563                         vv->ov_fb.fmt.width * fmt->depth / 8;
564
565         mutex_unlock(&dev->lock);
566         return 0;
567 }
568
569 static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
570 {
571         if (f->index >= NUM_FORMATS)
572                 return -EINVAL;
573         strlcpy((char *)f->description, formats[f->index].name,
574                         sizeof(f->description));
575         f->pixelformat = formats[f->index].pixelformat;
576         return 0;
577 }
578
579 static int vidioc_queryctrl(struct file *file, void *fh, struct v4l2_queryctrl *c)
580 {
581         const struct v4l2_queryctrl *ctrl;
582
583         if ((c->id <  V4L2_CID_BASE ||
584              c->id >= V4L2_CID_LASTP1) &&
585             (c->id <  V4L2_CID_PRIVATE_BASE ||
586              c->id >= V4L2_CID_PRIVATE_LASTP1))
587                 return -EINVAL;
588
589         ctrl = ctrl_by_id(c->id);
590         if (ctrl == NULL)
591                 return -EINVAL;
592
593         DEB_EE(("VIDIOC_QUERYCTRL: id:%d\n", c->id));
594         *c = *ctrl;
595         return 0;
596 }
597
598 static int vidioc_g_ctrl(struct file *file, void *fh, struct v4l2_control *c)
599 {
600         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
601         struct saa7146_vv *vv = dev->vv_data;
602         const struct v4l2_queryctrl *ctrl;
603         u32 value = 0;
604
605         ctrl = ctrl_by_id(c->id);
606         if (NULL == ctrl)
607                 return -EINVAL;
608         switch (c->id) {
609         case V4L2_CID_BRIGHTNESS:
610                 value = saa7146_read(dev, BCS_CTRL);
611                 c->value = 0xff & (value >> 24);
612                 DEB_D(("V4L2_CID_BRIGHTNESS: %d\n", c->value));
613                 break;
614         case V4L2_CID_CONTRAST:
615                 value = saa7146_read(dev, BCS_CTRL);
616                 c->value = 0x7f & (value >> 16);
617                 DEB_D(("V4L2_CID_CONTRAST: %d\n", c->value));
618                 break;
619         case V4L2_CID_SATURATION:
620                 value = saa7146_read(dev, BCS_CTRL);
621                 c->value = 0x7f & (value >> 0);
622                 DEB_D(("V4L2_CID_SATURATION: %d\n", c->value));
623                 break;
624         case V4L2_CID_VFLIP:
625                 c->value = vv->vflip;
626                 DEB_D(("V4L2_CID_VFLIP: %d\n", c->value));
627                 break;
628         case V4L2_CID_HFLIP:
629                 c->value = vv->hflip;
630                 DEB_D(("V4L2_CID_HFLIP: %d\n", c->value));
631                 break;
632         default:
633                 return -EINVAL;
634         }
635         return 0;
636 }
637
638 static int vidioc_s_ctrl(struct file *file, void *fh, struct v4l2_control *c)
639 {
640         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
641         struct saa7146_vv *vv = dev->vv_data;
642         const struct v4l2_queryctrl *ctrl;
643
644         ctrl = ctrl_by_id(c->id);
645         if (NULL == ctrl) {
646                 DEB_D(("unknown control %d\n", c->id));
647                 return -EINVAL;
648         }
649
650         mutex_lock(&dev->lock);
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                         mutex_unlock(&dev->lock);
695                         return -EBUSY;
696                 }
697                 vv->hflip = c->value;
698                 break;
699         case V4L2_CID_VFLIP:
700                 if (IS_CAPTURE_ACTIVE(fh) != 0) {
701                         DEB_D(("V4L2_CID_VFLIP while active capture.\n"));
702                         mutex_unlock(&dev->lock);
703                         return -EBUSY;
704                 }
705                 vv->vflip = c->value;
706                 break;
707         default:
708                 mutex_unlock(&dev->lock);
709                 return -EINVAL;
710         }
711         mutex_unlock(&dev->lock);
712
713         if (IS_OVERLAY_ACTIVE(fh) != 0) {
714                 saa7146_stop_preview(fh);
715                 saa7146_start_preview(fh);
716         }
717         return 0;
718 }
719
720 static int vidioc_g_parm(struct file *file, void *fh,
721                 struct v4l2_streamparm *parm)
722 {
723         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
724         struct saa7146_vv *vv = dev->vv_data;
725
726         parm->parm.capture.readbuffers = 1;
727         v4l2_video_std_frame_period(vv->standard->id,
728                                     &parm->parm.capture.timeperframe);
729         return 0;
730 }
731
732 static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
733 {
734         f->fmt.pix = ((struct saa7146_fh *)fh)->video_fmt;
735         return 0;
736 }
737
738 static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
739 {
740         f->fmt.win = ((struct saa7146_fh *)fh)->ov.win;
741         return 0;
742 }
743
744 static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f)
745 {
746         f->fmt.vbi = ((struct saa7146_fh *)fh)->vbi_fmt;
747         return 0;
748 }
749
750 static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
751 {
752         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
753         struct saa7146_vv *vv = dev->vv_data;
754         struct saa7146_format *fmt;
755         enum v4l2_field field;
756         int maxw, maxh;
757         int calc_bpl;
758
759         DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh));
760
761         fmt = format_by_fourcc(dev, f->fmt.pix.pixelformat);
762         if (NULL == fmt)
763                 return -EINVAL;
764
765         field = f->fmt.pix.field;
766         maxw  = vv->standard->h_max_out;
767         maxh  = vv->standard->v_max_out;
768
769         if (V4L2_FIELD_ANY == field) {
770                 field = (f->fmt.pix.height > maxh / 2)
771                         ? V4L2_FIELD_INTERLACED
772                         : V4L2_FIELD_BOTTOM;
773         }
774         switch (field) {
775         case V4L2_FIELD_ALTERNATE:
776                 vv->last_field = V4L2_FIELD_TOP;
777                 maxh = maxh / 2;
778                 break;
779         case V4L2_FIELD_TOP:
780         case V4L2_FIELD_BOTTOM:
781                 vv->last_field = V4L2_FIELD_INTERLACED;
782                 maxh = maxh / 2;
783                 break;
784         case V4L2_FIELD_INTERLACED:
785                 vv->last_field = V4L2_FIELD_INTERLACED;
786                 break;
787         default:
788                 DEB_D(("no known field mode '%d'.\n", field));
789                 return -EINVAL;
790         }
791
792         f->fmt.pix.field = field;
793         if (f->fmt.pix.width > maxw)
794                 f->fmt.pix.width = maxw;
795         if (f->fmt.pix.height > maxh)
796                 f->fmt.pix.height = maxh;
797
798         calc_bpl = (f->fmt.pix.width * fmt->depth) / 8;
799
800         if (f->fmt.pix.bytesperline < calc_bpl)
801                 f->fmt.pix.bytesperline = calc_bpl;
802
803         if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */
804                 f->fmt.pix.bytesperline = calc_bpl;
805
806         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
807         DEB_D(("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n", f->fmt.pix.width,
808                         f->fmt.pix.height, f->fmt.pix.bytesperline, f->fmt.pix.sizeimage));
809
810         return 0;
811 }
812
813
814 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
815 {
816         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
817         struct saa7146_vv *vv = dev->vv_data;
818         struct v4l2_window *win = &f->fmt.win;
819         enum v4l2_field field;
820         int maxw, maxh;
821
822         DEB_EE(("dev:%p\n", dev));
823
824         if (NULL == vv->ov_fb.base) {
825                 DEB_D(("no fb base set.\n"));
826                 return -EINVAL;
827         }
828         if (NULL == vv->ov_fmt) {
829                 DEB_D(("no fb fmt set.\n"));
830                 return -EINVAL;
831         }
832         if (win->w.width < 48 || win->w.height < 32) {
833                 DEB_D(("min width/height. (%d,%d)\n", win->w.width, win->w.height));
834                 return -EINVAL;
835         }
836         if (win->clipcount > 16) {
837                 DEB_D(("clipcount too big.\n"));
838                 return -EINVAL;
839         }
840
841         field = win->field;
842         maxw  = vv->standard->h_max_out;
843         maxh  = vv->standard->v_max_out;
844
845         if (V4L2_FIELD_ANY == field) {
846                 field = (win->w.height > maxh / 2)
847                         ? V4L2_FIELD_INTERLACED
848                         : V4L2_FIELD_TOP;
849                 }
850         switch (field) {
851         case V4L2_FIELD_TOP:
852         case V4L2_FIELD_BOTTOM:
853         case V4L2_FIELD_ALTERNATE:
854                 maxh = maxh / 2;
855                 break;
856         case V4L2_FIELD_INTERLACED:
857                 break;
858         default:
859                 DEB_D(("no known field mode '%d'.\n", field));
860                 return -EINVAL;
861         }
862
863         win->field = field;
864         if (win->w.width > maxw)
865                 win->w.width = maxw;
866         if (win->w.height > maxh)
867                 win->w.height = maxh;
868
869         return 0;
870 }
871
872 static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f)
873 {
874         struct saa7146_fh *fh = __fh;
875         struct saa7146_dev *dev = fh->dev;
876         struct saa7146_vv *vv = dev->vv_data;
877         int err;
878
879         DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh));
880         if (IS_CAPTURE_ACTIVE(fh) != 0) {
881                 DEB_EE(("streaming capture is active\n"));
882                 return -EBUSY;
883         }
884         err = vidioc_try_fmt_vid_cap(file, fh, f);
885         if (0 != err)
886                 return err;
887         fh->video_fmt = f->fmt.pix;
888         DEB_EE(("set to pixelformat '%4.4s'\n", (char *)&fh->video_fmt.pixelformat));
889         return 0;
890 }
891
892 static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f)
893 {
894         struct saa7146_fh *fh = __fh;
895         struct saa7146_dev *dev = fh->dev;
896         struct saa7146_vv *vv = dev->vv_data;
897         int err;
898
899         DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh));
900         err = vidioc_try_fmt_vid_overlay(file, fh, f);
901         if (0 != err)
902                 return err;
903         mutex_lock(&dev->lock);
904         fh->ov.win    = f->fmt.win;
905         fh->ov.nclips = f->fmt.win.clipcount;
906         if (fh->ov.nclips > 16)
907                 fh->ov.nclips = 16;
908         if (copy_from_user(fh->ov.clips, f->fmt.win.clips,
909                                 sizeof(struct v4l2_clip) * fh->ov.nclips)) {
910                 mutex_unlock(&dev->lock);
911                 return -EFAULT;
912         }
913
914         /* fh->ov.fh is used to indicate that we have valid overlay informations, too */
915         fh->ov.fh = fh;
916
917         mutex_unlock(&dev->lock);
918
919         /* check if our current overlay is active */
920         if (IS_OVERLAY_ACTIVE(fh) != 0) {
921                 saa7146_stop_preview(fh);
922                 saa7146_start_preview(fh);
923         }
924         return 0;
925 }
926
927 static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm)
928 {
929         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
930         struct saa7146_vv *vv = dev->vv_data;
931
932         *norm = vv->standard->id;
933         return 0;
934 }
935
936         /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
937            PAL / NTSC / SECAM. if your hardware does not (or does more)
938            -- override this function in your extension */
939 /*
940         case VIDIOC_ENUMSTD:
941         {
942                 struct v4l2_standard *e = arg;
943                 if (e->index < 0 )
944                         return -EINVAL;
945                 if( e->index < dev->ext_vv_data->num_stds ) {
946                         DEB_EE(("VIDIOC_ENUMSTD: index:%d\n",e->index));
947                         v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
948                         return 0;
949                 }
950                 return -EINVAL;
951         }
952         */
953
954 static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id *id)
955 {
956         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
957         struct saa7146_vv *vv = dev->vv_data;
958         int found = 0;
959         int err, i;
960
961         DEB_EE(("VIDIOC_S_STD\n"));
962
963         if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
964                 DEB_D(("cannot change video standard while streaming capture is active\n"));
965                 return -EBUSY;
966         }
967
968         if ((vv->video_status & STATUS_OVERLAY) != 0) {
969                 vv->ov_suspend = vv->video_fh;
970                 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
971                 if (0 != err) {
972                         DEB_D(("suspending video failed. aborting\n"));
973                         return err;
974                 }
975         }
976
977         mutex_lock(&dev->lock);
978
979         for (i = 0; i < dev->ext_vv_data->num_stds; i++)
980                 if (*id & dev->ext_vv_data->stds[i].id)
981                         break;
982         if (i != dev->ext_vv_data->num_stds) {
983                 vv->standard = &dev->ext_vv_data->stds[i];
984                 if (NULL != dev->ext_vv_data->std_callback)
985                         dev->ext_vv_data->std_callback(dev, vv->standard);
986                 found = 1;
987         }
988
989         mutex_unlock(&dev->lock);
990
991         if (vv->ov_suspend != NULL) {
992                 saa7146_start_preview(vv->ov_suspend);
993                 vv->ov_suspend = NULL;
994         }
995
996         if (!found) {
997                 DEB_EE(("VIDIOC_S_STD: standard not found.\n"));
998                 return -EINVAL;
999         }
1000
1001         DEB_EE(("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name));
1002         return 0;
1003 }
1004
1005 static int vidioc_overlay(struct file *file, void *fh, unsigned int on)
1006 {
1007         int err;
1008
1009         DEB_D(("VIDIOC_OVERLAY on:%d\n", on));
1010         if (on)
1011                 err = saa7146_start_preview(fh);
1012         else
1013                 err = saa7146_stop_preview(fh);
1014         return err;
1015 }
1016
1017 static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b)
1018 {
1019         struct saa7146_fh *fh = __fh;
1020
1021         if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1022                 return videobuf_reqbufs(&fh->video_q, b);
1023         if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1024                 return videobuf_reqbufs(&fh->vbi_q, b);
1025         return -EINVAL;
1026 }
1027
1028 static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1029 {
1030         struct saa7146_fh *fh = __fh;
1031
1032         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1033                 return videobuf_querybuf(&fh->video_q, buf);
1034         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1035                 return videobuf_querybuf(&fh->vbi_q, buf);
1036         return -EINVAL;
1037 }
1038
1039 static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1040 {
1041         struct saa7146_fh *fh = __fh;
1042
1043         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1044                 return videobuf_qbuf(&fh->video_q, buf);
1045         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1046                 return videobuf_qbuf(&fh->vbi_q, buf);
1047         return -EINVAL;
1048 }
1049
1050 static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1051 {
1052         struct saa7146_fh *fh = __fh;
1053
1054         if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1055                 return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK);
1056         if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1057                 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK);
1058         return -EINVAL;
1059 }
1060
1061 static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
1062 {
1063         struct saa7146_fh *fh = __fh;
1064         int err;
1065
1066         DEB_D(("VIDIOC_STREAMON, type:%d\n", type));
1067
1068         err = video_begin(fh);
1069         if (err)
1070                 return err;
1071         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1072                 return videobuf_streamon(&fh->video_q);
1073         if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1074                 return videobuf_streamon(&fh->vbi_q);
1075         return -EINVAL;
1076 }
1077
1078 static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
1079 {
1080         struct saa7146_fh *fh = __fh;
1081         struct saa7146_dev *dev = fh->dev;
1082         struct saa7146_vv *vv = dev->vv_data;
1083         int err;
1084
1085         DEB_D(("VIDIOC_STREAMOFF, type:%d\n", type));
1086
1087         /* ugly: we need to copy some checks from video_end(),
1088            because videobuf_streamoff() relies on the capture running.
1089            check and fix this */
1090         if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
1091                 DEB_S(("not capturing.\n"));
1092                 return 0;
1093         }
1094
1095         if (vv->video_fh != fh) {
1096                 DEB_S(("capturing, but in another open.\n"));
1097                 return -EBUSY;
1098         }
1099
1100         err = -EINVAL;
1101         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1102                 err = videobuf_streamoff(&fh->video_q);
1103         else if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1104                 err = videobuf_streamoff(&fh->vbi_q);
1105         if (0 != err) {
1106                 DEB_D(("warning: videobuf_streamoff() failed.\n"));
1107                 video_end(fh, file);
1108         } else {
1109                 err = video_end(fh, file);
1110         }
1111         return err;
1112 }
1113
1114 static int vidioc_g_chip_ident(struct file *file, void *__fh,
1115                 struct v4l2_dbg_chip_ident *chip)
1116 {
1117         struct saa7146_fh *fh = __fh;
1118         struct saa7146_dev *dev = fh->dev;
1119
1120         chip->ident = V4L2_IDENT_NONE;
1121         chip->revision = 0;
1122         if (chip->match.type == V4L2_CHIP_MATCH_HOST && !chip->match.addr) {
1123                 chip->ident = V4L2_IDENT_SAA7146;
1124                 return 0;
1125         }
1126         return v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1127                         core, g_chip_ident, chip);
1128 }
1129
1130 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1131 static int vidiocgmbuf(struct file *file, void *__fh, struct video_mbuf *mbuf)
1132 {
1133         struct saa7146_fh *fh = __fh;
1134         struct videobuf_queue *q = &fh->video_q;
1135         int err, i;
1136
1137         /* fixme: number of capture buffers and sizes for v4l apps */
1138         int gbuffers = 2;
1139         int gbufsize = 768 * 576 * 4;
1140
1141         DEB_D(("VIDIOCGMBUF \n"));
1142
1143         q = &fh->video_q;
1144         err = videobuf_mmap_setup(q, gbuffers, gbufsize,
1145                         V4L2_MEMORY_MMAP);
1146         if (err < 0)
1147                 return err;
1148
1149         gbuffers = err;
1150         memset(mbuf, 0, sizeof(*mbuf));
1151         mbuf->frames = gbuffers;
1152         mbuf->size   = gbuffers * gbufsize;
1153         for (i = 0; i < gbuffers; i++)
1154                 mbuf->offsets[i] = i * gbufsize;
1155         return 0;
1156 }
1157 #endif
1158
1159 const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
1160         .vidioc_querycap             = vidioc_querycap,
1161         .vidioc_enum_fmt_vid_cap     = vidioc_enum_fmt_vid_cap,
1162         .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap,
1163         .vidioc_g_fmt_vid_cap        = vidioc_g_fmt_vid_cap,
1164         .vidioc_try_fmt_vid_cap      = vidioc_try_fmt_vid_cap,
1165         .vidioc_s_fmt_vid_cap        = vidioc_s_fmt_vid_cap,
1166         .vidioc_g_fmt_vid_overlay    = vidioc_g_fmt_vid_overlay,
1167         .vidioc_try_fmt_vid_overlay  = vidioc_try_fmt_vid_overlay,
1168         .vidioc_s_fmt_vid_overlay    = vidioc_s_fmt_vid_overlay,
1169         .vidioc_g_fmt_vbi_cap        = vidioc_g_fmt_vbi_cap,
1170         .vidioc_g_chip_ident         = vidioc_g_chip_ident,
1171
1172         .vidioc_overlay              = vidioc_overlay,
1173         .vidioc_g_fbuf               = vidioc_g_fbuf,
1174         .vidioc_s_fbuf               = vidioc_s_fbuf,
1175         .vidioc_reqbufs              = vidioc_reqbufs,
1176         .vidioc_querybuf             = vidioc_querybuf,
1177         .vidioc_qbuf                 = vidioc_qbuf,
1178         .vidioc_dqbuf                = vidioc_dqbuf,
1179         .vidioc_g_std                = vidioc_g_std,
1180         .vidioc_s_std                = vidioc_s_std,
1181         .vidioc_queryctrl            = vidioc_queryctrl,
1182         .vidioc_g_ctrl               = vidioc_g_ctrl,
1183         .vidioc_s_ctrl               = vidioc_s_ctrl,
1184         .vidioc_streamon             = vidioc_streamon,
1185         .vidioc_streamoff            = vidioc_streamoff,
1186         .vidioc_g_parm               = vidioc_g_parm,
1187 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1188         .vidiocgmbuf                 = vidiocgmbuf,
1189 #endif
1190 };
1191
1192 /*********************************************************************************/
1193 /* buffer handling functions                                                  */
1194
1195 static int buffer_activate (struct saa7146_dev *dev,
1196                      struct saa7146_buf *buf,
1197                      struct saa7146_buf *next)
1198 {
1199         struct saa7146_vv *vv = dev->vv_data;
1200
1201         buf->vb.state = VIDEOBUF_ACTIVE;
1202         saa7146_set_capture(dev,buf,next);
1203
1204         mod_timer(&vv->video_q.timeout, jiffies+BUFFER_TIMEOUT);
1205         return 0;
1206 }
1207
1208 static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf)
1209 {
1210         saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1211         saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1212         saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1213 }
1214
1215 static int buffer_prepare(struct videobuf_queue *q,
1216                           struct videobuf_buffer *vb, enum v4l2_field field)
1217 {
1218         struct file *file = q->priv_data;
1219         struct saa7146_fh *fh = file->private_data;
1220         struct saa7146_dev *dev = fh->dev;
1221         struct saa7146_vv *vv = dev->vv_data;
1222         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1223         int size,err = 0;
1224
1225         DEB_CAP(("vbuf:%p\n",vb));
1226
1227         /* sanity checks */
1228         if (fh->video_fmt.width  < 48 ||
1229             fh->video_fmt.height < 32 ||
1230             fh->video_fmt.width  > vv->standard->h_max_out ||
1231             fh->video_fmt.height > vv->standard->v_max_out) {
1232                 DEB_D(("w (%d) / h (%d) out of bounds.\n",fh->video_fmt.width,fh->video_fmt.height));
1233                 return -EINVAL;
1234         }
1235
1236         size = fh->video_fmt.sizeimage;
1237         if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1238                 DEB_D(("size mismatch.\n"));
1239                 return -EINVAL;
1240         }
1241
1242         DEB_CAP(("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1243                 fh->video_fmt.width,fh->video_fmt.height,size,v4l2_field_names[fh->video_fmt.field]));
1244         if (buf->vb.width  != fh->video_fmt.width  ||
1245             buf->vb.bytesperline != fh->video_fmt.bytesperline ||
1246             buf->vb.height != fh->video_fmt.height ||
1247             buf->vb.size   != size ||
1248             buf->vb.field  != field      ||
1249             buf->vb.field  != fh->video_fmt.field  ||
1250             buf->fmt       != &fh->video_fmt) {
1251                 saa7146_dma_free(dev,q,buf);
1252         }
1253
1254         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1255                 struct saa7146_format *sfmt;
1256
1257                 buf->vb.bytesperline  = fh->video_fmt.bytesperline;
1258                 buf->vb.width  = fh->video_fmt.width;
1259                 buf->vb.height = fh->video_fmt.height;
1260                 buf->vb.size   = size;
1261                 buf->vb.field  = field;
1262                 buf->fmt       = &fh->video_fmt;
1263                 buf->vb.field  = fh->video_fmt.field;
1264
1265                 sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
1266
1267                 release_all_pagetables(dev, buf);
1268                 if( 0 != IS_PLANAR(sfmt->trans)) {
1269                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1270                         saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1271                         saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1272                 } else {
1273                         saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1274                 }
1275
1276                 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1277                 if (err)
1278                         goto oops;
1279                 err = saa7146_pgtable_build(dev,buf);
1280                 if (err)
1281                         goto oops;
1282         }
1283         buf->vb.state = VIDEOBUF_PREPARED;
1284         buf->activate = buffer_activate;
1285
1286         return 0;
1287
1288  oops:
1289         DEB_D(("error out.\n"));
1290         saa7146_dma_free(dev,q,buf);
1291
1292         return err;
1293 }
1294
1295 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1296 {
1297         struct file *file = q->priv_data;
1298         struct saa7146_fh *fh = file->private_data;
1299
1300         if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1301                 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1302
1303         *size = fh->video_fmt.sizeimage;
1304
1305         /* check if we exceed the "max_memory" parameter */
1306         if( (*count * *size) > (max_memory*1048576) ) {
1307                 *count = (max_memory*1048576) / *size;
1308         }
1309
1310         DEB_CAP(("%d buffers, %d bytes each.\n",*count,*size));
1311
1312         return 0;
1313 }
1314
1315 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1316 {
1317         struct file *file = q->priv_data;
1318         struct saa7146_fh *fh = file->private_data;
1319         struct saa7146_dev *dev = fh->dev;
1320         struct saa7146_vv *vv = dev->vv_data;
1321         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1322
1323         DEB_CAP(("vbuf:%p\n",vb));
1324         saa7146_buffer_queue(fh->dev,&vv->video_q,buf);
1325 }
1326
1327 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1328 {
1329         struct file *file = q->priv_data;
1330         struct saa7146_fh *fh = file->private_data;
1331         struct saa7146_dev *dev = fh->dev;
1332         struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1333
1334         DEB_CAP(("vbuf:%p\n",vb));
1335
1336         saa7146_dma_free(dev,q,buf);
1337
1338         release_all_pagetables(dev, buf);
1339 }
1340
1341 static struct videobuf_queue_ops video_qops = {
1342         .buf_setup    = buffer_setup,
1343         .buf_prepare  = buffer_prepare,
1344         .buf_queue    = buffer_queue,
1345         .buf_release  = buffer_release,
1346 };
1347
1348 /********************************************************************************/
1349 /* file operations */
1350
1351 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1352 {
1353         INIT_LIST_HEAD(&vv->video_q.queue);
1354
1355         init_timer(&vv->video_q.timeout);
1356         vv->video_q.timeout.function = saa7146_buffer_timeout;
1357         vv->video_q.timeout.data     = (unsigned long)(&vv->video_q);
1358         vv->video_q.dev              = dev;
1359
1360         /* set some default values */
1361         vv->standard = &dev->ext_vv_data->stds[0];
1362
1363         /* FIXME: what's this? */
1364         vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1365         vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1366 }
1367
1368
1369 static int video_open(struct saa7146_dev *dev, struct file *file)
1370 {
1371         struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1372         struct saa7146_format *sfmt;
1373
1374         fh->video_fmt.width = 384;
1375         fh->video_fmt.height = 288;
1376         fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24;
1377         fh->video_fmt.bytesperline = 0;
1378         fh->video_fmt.field = V4L2_FIELD_ANY;
1379         sfmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
1380         fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8;
1381
1382         videobuf_queue_sg_init(&fh->video_q, &video_qops,
1383                             &dev->pci->dev, &dev->slock,
1384                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
1385                             V4L2_FIELD_INTERLACED,
1386                             sizeof(struct saa7146_buf),
1387                             file);
1388
1389         return 0;
1390 }
1391
1392
1393 static void video_close(struct saa7146_dev *dev, struct file *file)
1394 {
1395         struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1396         struct saa7146_vv *vv = dev->vv_data;
1397         struct videobuf_queue *q = &fh->video_q;
1398         int err;
1399
1400         if (IS_CAPTURE_ACTIVE(fh) != 0) {
1401                 err = video_end(fh, file);
1402         } else if (IS_OVERLAY_ACTIVE(fh) != 0) {
1403                 err = saa7146_stop_preview(fh);
1404         }
1405
1406         videobuf_stop(q);
1407
1408         /* hmm, why is this function declared void? */
1409         /* return err */
1410 }
1411
1412
1413 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1414 {
1415         struct saa7146_vv *vv = dev->vv_data;
1416         struct saa7146_dmaqueue *q = &vv->video_q;
1417
1418         spin_lock(&dev->slock);
1419         DEB_CAP(("called.\n"));
1420
1421         /* only finish the buffer if we have one... */
1422         if( NULL != q->curr ) {
1423                 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1424         }
1425         saa7146_buffer_next(dev,q,0);
1426
1427         spin_unlock(&dev->slock);
1428 }
1429
1430 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1431 {
1432         struct saa7146_fh *fh = file->private_data;
1433         struct saa7146_dev *dev = fh->dev;
1434         struct saa7146_vv *vv = dev->vv_data;
1435         ssize_t ret = 0;
1436
1437         DEB_EE(("called.\n"));
1438
1439         if ((vv->video_status & STATUS_CAPTURE) != 0) {
1440                 /* fixme: should we allow read() captures while streaming capture? */
1441                 if (vv->video_fh == fh) {
1442                         DEB_S(("already capturing.\n"));
1443                         return -EBUSY;
1444                 }
1445                 DEB_S(("already capturing in another open.\n"));
1446                 return -EBUSY;
1447         }
1448
1449         ret = video_begin(fh);
1450         if( 0 != ret) {
1451                 goto out;
1452         }
1453
1454         ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1455                                 file->f_flags & O_NONBLOCK);
1456         if (ret != 0) {
1457                 video_end(fh, file);
1458         } else {
1459                 ret = video_end(fh, file);
1460         }
1461 out:
1462         /* restart overlay if it was active before */
1463         if (vv->ov_suspend != NULL) {
1464                 saa7146_start_preview(vv->ov_suspend);
1465                 vv->ov_suspend = NULL;
1466         }
1467
1468         return ret;
1469 }
1470
1471 struct saa7146_use_ops saa7146_video_uops = {
1472         .init = video_init,
1473         .open = video_open,
1474         .release = video_close,
1475         .irq_done = video_irq_done,
1476         .read = video_read,
1477 };