tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#include <media/saa7146_vv.h>
2#include <media/v4l2-chip-ident.h>
3
4static int max_memory = 32;
5
6module_param(max_memory, int, 0644);
7MODULE_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 */
16static 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
85static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
86
87struct saa7146_format* saa7146_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
101static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f);
102
103int 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}
164EXPORT_SYMBOL_GPL(saa7146_start_preview);
165
166int 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}
199EXPORT_SYMBOL_GPL(saa7146_stop_preview);
200
201/********************************************************************************/
202/* device controls */
203
204static 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};
246static int NUM_CONTROLS = sizeof(controls)/sizeof(struct v4l2_queryctrl);
247
248#define V4L2_CID_PRIVATE_LASTP1 (V4L2_CID_PRIVATE_BASE + 0)
249
250static 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
263static 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 = saa7146_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
382static 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 = saa7146_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
443static 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 = saa7146_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
500static 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
517static 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
527static 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 = saa7146_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 /* ok, accept it */
557 vv->ov_fb = *fb;
558 vv->ov_fmt = fmt;
559
560 if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) {
561 vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8;
562 DEB_D(("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline));
563 }
564 return 0;
565}
566
567static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
568{
569 if (f->index >= NUM_FORMATS)
570 return -EINVAL;
571 strlcpy((char *)f->description, formats[f->index].name,
572 sizeof(f->description));
573 f->pixelformat = formats[f->index].pixelformat;
574 return 0;
575}
576
577static int vidioc_queryctrl(struct file *file, void *fh, struct v4l2_queryctrl *c)
578{
579 const struct v4l2_queryctrl *ctrl;
580
581 if ((c->id < V4L2_CID_BASE ||
582 c->id >= V4L2_CID_LASTP1) &&
583 (c->id < V4L2_CID_PRIVATE_BASE ||
584 c->id >= V4L2_CID_PRIVATE_LASTP1))
585 return -EINVAL;
586
587 ctrl = ctrl_by_id(c->id);
588 if (ctrl == NULL)
589 return -EINVAL;
590
591 DEB_EE(("VIDIOC_QUERYCTRL: id:%d\n", c->id));
592 *c = *ctrl;
593 return 0;
594}
595
596static int vidioc_g_ctrl(struct file *file, void *fh, struct v4l2_control *c)
597{
598 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
599 struct saa7146_vv *vv = dev->vv_data;
600 const struct v4l2_queryctrl *ctrl;
601 u32 value = 0;
602
603 ctrl = ctrl_by_id(c->id);
604 if (NULL == ctrl)
605 return -EINVAL;
606 switch (c->id) {
607 case V4L2_CID_BRIGHTNESS:
608 value = saa7146_read(dev, BCS_CTRL);
609 c->value = 0xff & (value >> 24);
610 DEB_D(("V4L2_CID_BRIGHTNESS: %d\n", c->value));
611 break;
612 case V4L2_CID_CONTRAST:
613 value = saa7146_read(dev, BCS_CTRL);
614 c->value = 0x7f & (value >> 16);
615 DEB_D(("V4L2_CID_CONTRAST: %d\n", c->value));
616 break;
617 case V4L2_CID_SATURATION:
618 value = saa7146_read(dev, BCS_CTRL);
619 c->value = 0x7f & (value >> 0);
620 DEB_D(("V4L2_CID_SATURATION: %d\n", c->value));
621 break;
622 case V4L2_CID_VFLIP:
623 c->value = vv->vflip;
624 DEB_D(("V4L2_CID_VFLIP: %d\n", c->value));
625 break;
626 case V4L2_CID_HFLIP:
627 c->value = vv->hflip;
628 DEB_D(("V4L2_CID_HFLIP: %d\n", c->value));
629 break;
630 default:
631 return -EINVAL;
632 }
633 return 0;
634}
635
636static int vidioc_s_ctrl(struct file *file, void *fh, struct v4l2_control *c)
637{
638 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
639 struct saa7146_vv *vv = dev->vv_data;
640 const struct v4l2_queryctrl *ctrl;
641
642 ctrl = ctrl_by_id(c->id);
643 if (NULL == ctrl) {
644 DEB_D(("unknown control %d\n", c->id));
645 return -EINVAL;
646 }
647
648 switch (ctrl->type) {
649 case V4L2_CTRL_TYPE_BOOLEAN:
650 case V4L2_CTRL_TYPE_MENU:
651 case V4L2_CTRL_TYPE_INTEGER:
652 if (c->value < ctrl->minimum)
653 c->value = ctrl->minimum;
654 if (c->value > ctrl->maximum)
655 c->value = ctrl->maximum;
656 break;
657 default:
658 /* nothing */;
659 }
660
661 switch (c->id) {
662 case V4L2_CID_BRIGHTNESS: {
663 u32 value = saa7146_read(dev, BCS_CTRL);
664 value &= 0x00ffffff;
665 value |= (c->value << 24);
666 saa7146_write(dev, BCS_CTRL, value);
667 saa7146_write(dev, MC2, MASK_22 | MASK_06);
668 break;
669 }
670 case V4L2_CID_CONTRAST: {
671 u32 value = saa7146_read(dev, BCS_CTRL);
672 value &= 0xff00ffff;
673 value |= (c->value << 16);
674 saa7146_write(dev, BCS_CTRL, value);
675 saa7146_write(dev, MC2, MASK_22 | MASK_06);
676 break;
677 }
678 case V4L2_CID_SATURATION: {
679 u32 value = saa7146_read(dev, BCS_CTRL);
680 value &= 0xffffff00;
681 value |= (c->value << 0);
682 saa7146_write(dev, BCS_CTRL, value);
683 saa7146_write(dev, MC2, MASK_22 | MASK_06);
684 break;
685 }
686 case V4L2_CID_HFLIP:
687 /* fixme: we can support changing VFLIP and HFLIP here... */
688 if (IS_CAPTURE_ACTIVE(fh) != 0) {
689 DEB_D(("V4L2_CID_HFLIP while active capture.\n"));
690 return -EBUSY;
691 }
692 vv->hflip = c->value;
693 break;
694 case V4L2_CID_VFLIP:
695 if (IS_CAPTURE_ACTIVE(fh) != 0) {
696 DEB_D(("V4L2_CID_VFLIP while active capture.\n"));
697 return -EBUSY;
698 }
699 vv->vflip = c->value;
700 break;
701 default:
702 return -EINVAL;
703 }
704
705 if (IS_OVERLAY_ACTIVE(fh) != 0) {
706 saa7146_stop_preview(fh);
707 saa7146_start_preview(fh);
708 }
709 return 0;
710}
711
712static int vidioc_g_parm(struct file *file, void *fh,
713 struct v4l2_streamparm *parm)
714{
715 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
716 struct saa7146_vv *vv = dev->vv_data;
717
718 parm->parm.capture.readbuffers = 1;
719 v4l2_video_std_frame_period(vv->standard->id,
720 &parm->parm.capture.timeperframe);
721 return 0;
722}
723
724static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
725{
726 f->fmt.pix = ((struct saa7146_fh *)fh)->video_fmt;
727 return 0;
728}
729
730static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
731{
732 f->fmt.win = ((struct saa7146_fh *)fh)->ov.win;
733 return 0;
734}
735
736static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f)
737{
738 f->fmt.vbi = ((struct saa7146_fh *)fh)->vbi_fmt;
739 return 0;
740}
741
742static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
743{
744 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
745 struct saa7146_vv *vv = dev->vv_data;
746 struct saa7146_format *fmt;
747 enum v4l2_field field;
748 int maxw, maxh;
749 int calc_bpl;
750
751 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh));
752
753 fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat);
754 if (NULL == fmt)
755 return -EINVAL;
756
757 field = f->fmt.pix.field;
758 maxw = vv->standard->h_max_out;
759 maxh = vv->standard->v_max_out;
760
761 if (V4L2_FIELD_ANY == field) {
762 field = (f->fmt.pix.height > maxh / 2)
763 ? V4L2_FIELD_INTERLACED
764 : V4L2_FIELD_BOTTOM;
765 }
766 switch (field) {
767 case V4L2_FIELD_ALTERNATE:
768 vv->last_field = V4L2_FIELD_TOP;
769 maxh = maxh / 2;
770 break;
771 case V4L2_FIELD_TOP:
772 case V4L2_FIELD_BOTTOM:
773 vv->last_field = V4L2_FIELD_INTERLACED;
774 maxh = maxh / 2;
775 break;
776 case V4L2_FIELD_INTERLACED:
777 vv->last_field = V4L2_FIELD_INTERLACED;
778 break;
779 default:
780 DEB_D(("no known field mode '%d'.\n", field));
781 return -EINVAL;
782 }
783
784 f->fmt.pix.field = field;
785 if (f->fmt.pix.width > maxw)
786 f->fmt.pix.width = maxw;
787 if (f->fmt.pix.height > maxh)
788 f->fmt.pix.height = maxh;
789
790 calc_bpl = (f->fmt.pix.width * fmt->depth) / 8;
791
792 if (f->fmt.pix.bytesperline < calc_bpl)
793 f->fmt.pix.bytesperline = calc_bpl;
794
795 if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */
796 f->fmt.pix.bytesperline = calc_bpl;
797
798 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
799 DEB_D(("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n", f->fmt.pix.width,
800 f->fmt.pix.height, f->fmt.pix.bytesperline, f->fmt.pix.sizeimage));
801
802 return 0;
803}
804
805
806static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
807{
808 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
809 struct saa7146_vv *vv = dev->vv_data;
810 struct v4l2_window *win = &f->fmt.win;
811 enum v4l2_field field;
812 int maxw, maxh;
813
814 DEB_EE(("dev:%p\n", dev));
815
816 if (NULL == vv->ov_fb.base) {
817 DEB_D(("no fb base set.\n"));
818 return -EINVAL;
819 }
820 if (NULL == vv->ov_fmt) {
821 DEB_D(("no fb fmt set.\n"));
822 return -EINVAL;
823 }
824 if (win->w.width < 48 || win->w.height < 32) {
825 DEB_D(("min width/height. (%d,%d)\n", win->w.width, win->w.height));
826 return -EINVAL;
827 }
828 if (win->clipcount > 16) {
829 DEB_D(("clipcount too big.\n"));
830 return -EINVAL;
831 }
832
833 field = win->field;
834 maxw = vv->standard->h_max_out;
835 maxh = vv->standard->v_max_out;
836
837 if (V4L2_FIELD_ANY == field) {
838 field = (win->w.height > maxh / 2)
839 ? V4L2_FIELD_INTERLACED
840 : V4L2_FIELD_TOP;
841 }
842 switch (field) {
843 case V4L2_FIELD_TOP:
844 case V4L2_FIELD_BOTTOM:
845 case V4L2_FIELD_ALTERNATE:
846 maxh = maxh / 2;
847 break;
848 case V4L2_FIELD_INTERLACED:
849 break;
850 default:
851 DEB_D(("no known field mode '%d'.\n", field));
852 return -EINVAL;
853 }
854
855 win->field = field;
856 if (win->w.width > maxw)
857 win->w.width = maxw;
858 if (win->w.height > maxh)
859 win->w.height = maxh;
860
861 return 0;
862}
863
864static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f)
865{
866 struct saa7146_fh *fh = __fh;
867 struct saa7146_dev *dev = fh->dev;
868 struct saa7146_vv *vv = dev->vv_data;
869 int err;
870
871 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh));
872 if (IS_CAPTURE_ACTIVE(fh) != 0) {
873 DEB_EE(("streaming capture is active\n"));
874 return -EBUSY;
875 }
876 err = vidioc_try_fmt_vid_cap(file, fh, f);
877 if (0 != err)
878 return err;
879 fh->video_fmt = f->fmt.pix;
880 DEB_EE(("set to pixelformat '%4.4s'\n", (char *)&fh->video_fmt.pixelformat));
881 return 0;
882}
883
884static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f)
885{
886 struct saa7146_fh *fh = __fh;
887 struct saa7146_dev *dev = fh->dev;
888 struct saa7146_vv *vv = dev->vv_data;
889 int err;
890
891 DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh));
892 err = vidioc_try_fmt_vid_overlay(file, fh, f);
893 if (0 != err)
894 return err;
895 fh->ov.win = f->fmt.win;
896 fh->ov.nclips = f->fmt.win.clipcount;
897 if (fh->ov.nclips > 16)
898 fh->ov.nclips = 16;
899 if (copy_from_user(fh->ov.clips, f->fmt.win.clips,
900 sizeof(struct v4l2_clip) * fh->ov.nclips)) {
901 return -EFAULT;
902 }
903
904 /* fh->ov.fh is used to indicate that we have valid overlay informations, too */
905 fh->ov.fh = fh;
906
907 /* check if our current overlay is active */
908 if (IS_OVERLAY_ACTIVE(fh) != 0) {
909 saa7146_stop_preview(fh);
910 saa7146_start_preview(fh);
911 }
912 return 0;
913}
914
915static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm)
916{
917 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
918 struct saa7146_vv *vv = dev->vv_data;
919
920 *norm = vv->standard->id;
921 return 0;
922}
923
924 /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
925 PAL / NTSC / SECAM. if your hardware does not (or does more)
926 -- override this function in your extension */
927/*
928 case VIDIOC_ENUMSTD:
929 {
930 struct v4l2_standard *e = arg;
931 if (e->index < 0 )
932 return -EINVAL;
933 if( e->index < dev->ext_vv_data->num_stds ) {
934 DEB_EE(("VIDIOC_ENUMSTD: index:%d\n",e->index));
935 v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
936 return 0;
937 }
938 return -EINVAL;
939 }
940 */
941
942static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id *id)
943{
944 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
945 struct saa7146_vv *vv = dev->vv_data;
946 int found = 0;
947 int err, i;
948
949 DEB_EE(("VIDIOC_S_STD\n"));
950
951 if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
952 DEB_D(("cannot change video standard while streaming capture is active\n"));
953 return -EBUSY;
954 }
955
956 if ((vv->video_status & STATUS_OVERLAY) != 0) {
957 vv->ov_suspend = vv->video_fh;
958 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
959 if (0 != err) {
960 DEB_D(("suspending video failed. aborting\n"));
961 return err;
962 }
963 }
964
965 for (i = 0; i < dev->ext_vv_data->num_stds; i++)
966 if (*id & dev->ext_vv_data->stds[i].id)
967 break;
968 if (i != dev->ext_vv_data->num_stds) {
969 vv->standard = &dev->ext_vv_data->stds[i];
970 if (NULL != dev->ext_vv_data->std_callback)
971 dev->ext_vv_data->std_callback(dev, vv->standard);
972 found = 1;
973 }
974
975 if (vv->ov_suspend != NULL) {
976 saa7146_start_preview(vv->ov_suspend);
977 vv->ov_suspend = NULL;
978 }
979
980 if (!found) {
981 DEB_EE(("VIDIOC_S_STD: standard not found.\n"));
982 return -EINVAL;
983 }
984
985 DEB_EE(("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name));
986 return 0;
987}
988
989static int vidioc_overlay(struct file *file, void *fh, unsigned int on)
990{
991 int err;
992
993 DEB_D(("VIDIOC_OVERLAY on:%d\n", on));
994 if (on)
995 err = saa7146_start_preview(fh);
996 else
997 err = saa7146_stop_preview(fh);
998 return err;
999}
1000
1001static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b)
1002{
1003 struct saa7146_fh *fh = __fh;
1004
1005 if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1006 return videobuf_reqbufs(&fh->video_q, b);
1007 if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1008 return videobuf_reqbufs(&fh->vbi_q, b);
1009 return -EINVAL;
1010}
1011
1012static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1013{
1014 struct saa7146_fh *fh = __fh;
1015
1016 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1017 return videobuf_querybuf(&fh->video_q, buf);
1018 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1019 return videobuf_querybuf(&fh->vbi_q, buf);
1020 return -EINVAL;
1021}
1022
1023static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1024{
1025 struct saa7146_fh *fh = __fh;
1026
1027 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1028 return videobuf_qbuf(&fh->video_q, buf);
1029 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1030 return videobuf_qbuf(&fh->vbi_q, buf);
1031 return -EINVAL;
1032}
1033
1034static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1035{
1036 struct saa7146_fh *fh = __fh;
1037
1038 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1039 return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK);
1040 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1041 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK);
1042 return -EINVAL;
1043}
1044
1045static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
1046{
1047 struct saa7146_fh *fh = __fh;
1048 int err;
1049
1050 DEB_D(("VIDIOC_STREAMON, type:%d\n", type));
1051
1052 err = video_begin(fh);
1053 if (err)
1054 return err;
1055 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1056 return videobuf_streamon(&fh->video_q);
1057 if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1058 return videobuf_streamon(&fh->vbi_q);
1059 return -EINVAL;
1060}
1061
1062static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
1063{
1064 struct saa7146_fh *fh = __fh;
1065 struct saa7146_dev *dev = fh->dev;
1066 struct saa7146_vv *vv = dev->vv_data;
1067 int err;
1068
1069 DEB_D(("VIDIOC_STREAMOFF, type:%d\n", type));
1070
1071 /* ugly: we need to copy some checks from video_end(),
1072 because videobuf_streamoff() relies on the capture running.
1073 check and fix this */
1074 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
1075 DEB_S(("not capturing.\n"));
1076 return 0;
1077 }
1078
1079 if (vv->video_fh != fh) {
1080 DEB_S(("capturing, but in another open.\n"));
1081 return -EBUSY;
1082 }
1083
1084 err = -EINVAL;
1085 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1086 err = videobuf_streamoff(&fh->video_q);
1087 else if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1088 err = videobuf_streamoff(&fh->vbi_q);
1089 if (0 != err) {
1090 DEB_D(("warning: videobuf_streamoff() failed.\n"));
1091 video_end(fh, file);
1092 } else {
1093 err = video_end(fh, file);
1094 }
1095 return err;
1096}
1097
1098static int vidioc_g_chip_ident(struct file *file, void *__fh,
1099 struct v4l2_dbg_chip_ident *chip)
1100{
1101 struct saa7146_fh *fh = __fh;
1102 struct saa7146_dev *dev = fh->dev;
1103
1104 chip->ident = V4L2_IDENT_NONE;
1105 chip->revision = 0;
1106 if (chip->match.type == V4L2_CHIP_MATCH_HOST && !chip->match.addr) {
1107 chip->ident = V4L2_IDENT_SAA7146;
1108 return 0;
1109 }
1110 return v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1111 core, g_chip_ident, chip);
1112}
1113
1114const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
1115 .vidioc_querycap = vidioc_querycap,
1116 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1117 .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap,
1118 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1119 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1120 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1121 .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_vid_overlay,
1122 .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_vid_overlay,
1123 .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_vid_overlay,
1124 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
1125 .vidioc_g_chip_ident = vidioc_g_chip_ident,
1126
1127 .vidioc_overlay = vidioc_overlay,
1128 .vidioc_g_fbuf = vidioc_g_fbuf,
1129 .vidioc_s_fbuf = vidioc_s_fbuf,
1130 .vidioc_reqbufs = vidioc_reqbufs,
1131 .vidioc_querybuf = vidioc_querybuf,
1132 .vidioc_qbuf = vidioc_qbuf,
1133 .vidioc_dqbuf = vidioc_dqbuf,
1134 .vidioc_g_std = vidioc_g_std,
1135 .vidioc_s_std = vidioc_s_std,
1136 .vidioc_queryctrl = vidioc_queryctrl,
1137 .vidioc_g_ctrl = vidioc_g_ctrl,
1138 .vidioc_s_ctrl = vidioc_s_ctrl,
1139 .vidioc_streamon = vidioc_streamon,
1140 .vidioc_streamoff = vidioc_streamoff,
1141 .vidioc_g_parm = vidioc_g_parm,
1142};
1143
1144/*********************************************************************************/
1145/* buffer handling functions */
1146
1147static int buffer_activate (struct saa7146_dev *dev,
1148 struct saa7146_buf *buf,
1149 struct saa7146_buf *next)
1150{
1151 struct saa7146_vv *vv = dev->vv_data;
1152
1153 buf->vb.state = VIDEOBUF_ACTIVE;
1154 saa7146_set_capture(dev,buf,next);
1155
1156 mod_timer(&vv->video_q.timeout, jiffies+BUFFER_TIMEOUT);
1157 return 0;
1158}
1159
1160static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf)
1161{
1162 saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1163 saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1164 saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1165}
1166
1167static int buffer_prepare(struct videobuf_queue *q,
1168 struct videobuf_buffer *vb, enum v4l2_field field)
1169{
1170 struct file *file = q->priv_data;
1171 struct saa7146_fh *fh = file->private_data;
1172 struct saa7146_dev *dev = fh->dev;
1173 struct saa7146_vv *vv = dev->vv_data;
1174 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1175 int size,err = 0;
1176
1177 DEB_CAP(("vbuf:%p\n",vb));
1178
1179 /* sanity checks */
1180 if (fh->video_fmt.width < 48 ||
1181 fh->video_fmt.height < 32 ||
1182 fh->video_fmt.width > vv->standard->h_max_out ||
1183 fh->video_fmt.height > vv->standard->v_max_out) {
1184 DEB_D(("w (%d) / h (%d) out of bounds.\n",fh->video_fmt.width,fh->video_fmt.height));
1185 return -EINVAL;
1186 }
1187
1188 size = fh->video_fmt.sizeimage;
1189 if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1190 DEB_D(("size mismatch.\n"));
1191 return -EINVAL;
1192 }
1193
1194 DEB_CAP(("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1195 fh->video_fmt.width,fh->video_fmt.height,size,v4l2_field_names[fh->video_fmt.field]));
1196 if (buf->vb.width != fh->video_fmt.width ||
1197 buf->vb.bytesperline != fh->video_fmt.bytesperline ||
1198 buf->vb.height != fh->video_fmt.height ||
1199 buf->vb.size != size ||
1200 buf->vb.field != field ||
1201 buf->vb.field != fh->video_fmt.field ||
1202 buf->fmt != &fh->video_fmt) {
1203 saa7146_dma_free(dev,q,buf);
1204 }
1205
1206 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1207 struct saa7146_format *sfmt;
1208
1209 buf->vb.bytesperline = fh->video_fmt.bytesperline;
1210 buf->vb.width = fh->video_fmt.width;
1211 buf->vb.height = fh->video_fmt.height;
1212 buf->vb.size = size;
1213 buf->vb.field = field;
1214 buf->fmt = &fh->video_fmt;
1215 buf->vb.field = fh->video_fmt.field;
1216
1217 sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
1218
1219 release_all_pagetables(dev, buf);
1220 if( 0 != IS_PLANAR(sfmt->trans)) {
1221 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1222 saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1223 saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1224 } else {
1225 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1226 }
1227
1228 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1229 if (err)
1230 goto oops;
1231 err = saa7146_pgtable_build(dev,buf);
1232 if (err)
1233 goto oops;
1234 }
1235 buf->vb.state = VIDEOBUF_PREPARED;
1236 buf->activate = buffer_activate;
1237
1238 return 0;
1239
1240 oops:
1241 DEB_D(("error out.\n"));
1242 saa7146_dma_free(dev,q,buf);
1243
1244 return err;
1245}
1246
1247static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1248{
1249 struct file *file = q->priv_data;
1250 struct saa7146_fh *fh = file->private_data;
1251
1252 if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1253 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1254
1255 *size = fh->video_fmt.sizeimage;
1256
1257 /* check if we exceed the "max_memory" parameter */
1258 if( (*count * *size) > (max_memory*1048576) ) {
1259 *count = (max_memory*1048576) / *size;
1260 }
1261
1262 DEB_CAP(("%d buffers, %d bytes each.\n",*count,*size));
1263
1264 return 0;
1265}
1266
1267static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1268{
1269 struct file *file = q->priv_data;
1270 struct saa7146_fh *fh = file->private_data;
1271 struct saa7146_dev *dev = fh->dev;
1272 struct saa7146_vv *vv = dev->vv_data;
1273 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1274
1275 DEB_CAP(("vbuf:%p\n",vb));
1276 saa7146_buffer_queue(fh->dev,&vv->video_q,buf);
1277}
1278
1279static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1280{
1281 struct file *file = q->priv_data;
1282 struct saa7146_fh *fh = file->private_data;
1283 struct saa7146_dev *dev = fh->dev;
1284 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1285
1286 DEB_CAP(("vbuf:%p\n",vb));
1287
1288 saa7146_dma_free(dev,q,buf);
1289
1290 release_all_pagetables(dev, buf);
1291}
1292
1293static struct videobuf_queue_ops video_qops = {
1294 .buf_setup = buffer_setup,
1295 .buf_prepare = buffer_prepare,
1296 .buf_queue = buffer_queue,
1297 .buf_release = buffer_release,
1298};
1299
1300/********************************************************************************/
1301/* file operations */
1302
1303static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1304{
1305 INIT_LIST_HEAD(&vv->video_q.queue);
1306
1307 init_timer(&vv->video_q.timeout);
1308 vv->video_q.timeout.function = saa7146_buffer_timeout;
1309 vv->video_q.timeout.data = (unsigned long)(&vv->video_q);
1310 vv->video_q.dev = dev;
1311
1312 /* set some default values */
1313 vv->standard = &dev->ext_vv_data->stds[0];
1314
1315 /* FIXME: what's this? */
1316 vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1317 vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1318}
1319
1320
1321static int video_open(struct saa7146_dev *dev, struct file *file)
1322{
1323 struct saa7146_fh *fh = file->private_data;
1324 struct saa7146_format *sfmt;
1325
1326 fh->video_fmt.width = 384;
1327 fh->video_fmt.height = 288;
1328 fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24;
1329 fh->video_fmt.bytesperline = 0;
1330 fh->video_fmt.field = V4L2_FIELD_ANY;
1331 sfmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat);
1332 fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8;
1333
1334 videobuf_queue_sg_init(&fh->video_q, &video_qops,
1335 &dev->pci->dev, &dev->slock,
1336 V4L2_BUF_TYPE_VIDEO_CAPTURE,
1337 V4L2_FIELD_INTERLACED,
1338 sizeof(struct saa7146_buf),
1339 file, &dev->v4l2_lock);
1340
1341 return 0;
1342}
1343
1344
1345static void video_close(struct saa7146_dev *dev, struct file *file)
1346{
1347 struct saa7146_fh *fh = file->private_data;
1348 struct saa7146_vv *vv = dev->vv_data;
1349 struct videobuf_queue *q = &fh->video_q;
1350 int err;
1351
1352 if (IS_CAPTURE_ACTIVE(fh) != 0) {
1353 err = video_end(fh, file);
1354 } else if (IS_OVERLAY_ACTIVE(fh) != 0) {
1355 err = saa7146_stop_preview(fh);
1356 }
1357
1358 videobuf_stop(q);
1359
1360 /* hmm, why is this function declared void? */
1361 /* return err */
1362}
1363
1364
1365static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1366{
1367 struct saa7146_vv *vv = dev->vv_data;
1368 struct saa7146_dmaqueue *q = &vv->video_q;
1369
1370 spin_lock(&dev->slock);
1371 DEB_CAP(("called.\n"));
1372
1373 /* only finish the buffer if we have one... */
1374 if( NULL != q->curr ) {
1375 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1376 }
1377 saa7146_buffer_next(dev,q,0);
1378
1379 spin_unlock(&dev->slock);
1380}
1381
1382static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1383{
1384 struct saa7146_fh *fh = file->private_data;
1385 struct saa7146_dev *dev = fh->dev;
1386 struct saa7146_vv *vv = dev->vv_data;
1387 ssize_t ret = 0;
1388
1389 DEB_EE(("called.\n"));
1390
1391 if ((vv->video_status & STATUS_CAPTURE) != 0) {
1392 /* fixme: should we allow read() captures while streaming capture? */
1393 if (vv->video_fh == fh) {
1394 DEB_S(("already capturing.\n"));
1395 return -EBUSY;
1396 }
1397 DEB_S(("already capturing in another open.\n"));
1398 return -EBUSY;
1399 }
1400
1401 ret = video_begin(fh);
1402 if( 0 != ret) {
1403 goto out;
1404 }
1405
1406 ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1407 file->f_flags & O_NONBLOCK);
1408 if (ret != 0) {
1409 video_end(fh, file);
1410 } else {
1411 ret = video_end(fh, file);
1412 }
1413out:
1414 /* restart overlay if it was active before */
1415 if (vv->ov_suspend != NULL) {
1416 saa7146_start_preview(vv->ov_suspend);
1417 vv->ov_suspend = NULL;
1418 }
1419
1420 return ret;
1421}
1422
1423struct saa7146_use_ops saa7146_video_uops = {
1424 .init = video_init,
1425 .open = video_open,
1426 .release = video_close,
1427 .irq_done = video_irq_done,
1428 .read = video_read,
1429};