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Merge branch 'tip/tracing/core' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.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 release_all_pagetables(dev, buf);
1337
1338 saa7146_dma_free(dev,q,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 };
Linux kernel - Deliverables
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