1 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
2 
3 #include <media/drv-intf/saa7146_vv.h>
4 #include <media/v4l2-event.h>
5 #include <media/v4l2-ctrls.h>
6 #include <linux/module.h>
7 #include <linux/kernel.h>
8 
9 static int max_memory = 32;
10 
11 module_param(max_memory, int, 0644);
12 MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)");
13 
14 #define IS_CAPTURE_ACTIVE(fh) \
15 	(((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh))
16 
17 #define IS_OVERLAY_ACTIVE(fh) \
18 	(((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh))
19 
20 /* format descriptions for capture and preview */
21 static struct saa7146_format formats[] = {
22 	{
23 		.pixelformat	= V4L2_PIX_FMT_RGB332,
24 		.trans		= RGB08_COMPOSED,
25 		.depth		= 8,
26 		.flags		= 0,
27 	}, {
28 		.pixelformat	= V4L2_PIX_FMT_RGB565,
29 		.trans		= RGB16_COMPOSED,
30 		.depth		= 16,
31 		.flags		= 0,
32 	}, {
33 		.pixelformat	= V4L2_PIX_FMT_BGR24,
34 		.trans		= RGB24_COMPOSED,
35 		.depth		= 24,
36 		.flags		= 0,
37 	}, {
38 		.pixelformat	= V4L2_PIX_FMT_BGR32,
39 		.trans		= RGB32_COMPOSED,
40 		.depth		= 32,
41 		.flags		= 0,
42 	}, {
43 		.pixelformat	= V4L2_PIX_FMT_RGB32,
44 		.trans		= RGB32_COMPOSED,
45 		.depth		= 32,
46 		.flags		= 0,
47 		.swap		= 0x2,
48 	}, {
49 		.pixelformat	= V4L2_PIX_FMT_GREY,
50 		.trans		= Y8,
51 		.depth		= 8,
52 		.flags		= 0,
53 	}, {
54 		.pixelformat	= V4L2_PIX_FMT_YUV422P,
55 		.trans		= YUV422_DECOMPOSED,
56 		.depth		= 16,
57 		.flags		= FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
58 	}, {
59 		.pixelformat	= V4L2_PIX_FMT_YVU420,
60 		.trans		= YUV420_DECOMPOSED,
61 		.depth		= 12,
62 		.flags		= FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
63 	}, {
64 		.pixelformat	= V4L2_PIX_FMT_YUV420,
65 		.trans		= YUV420_DECOMPOSED,
66 		.depth		= 12,
67 		.flags		= FORMAT_IS_PLANAR,
68 	}, {
69 		.pixelformat	= V4L2_PIX_FMT_UYVY,
70 		.trans		= YUV422_COMPOSED,
71 		.depth		= 16,
72 		.flags		= 0,
73 	}
74 };
75 
76 /* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps.
77    due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped
78    (like V4L2_PIX_FMT_YUYV) ... 8-( */
79 
80 struct saa7146_format* saa7146_format_by_fourcc(struct saa7146_dev *dev, int fourcc)
81 {
82 	int i;
83 
84 	for (i = 0; i < ARRAY_SIZE(formats); i++) {
85 		if (formats[i].pixelformat == fourcc) {
86 			return formats+i;
87 		}
88 	}
89 
90 	DEB_D("unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
91 	return NULL;
92 }
93 
94 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f);
95 
96 int saa7146_start_preview(struct saa7146_fh *fh)
97 {
98 	struct saa7146_dev *dev = fh->dev;
99 	struct saa7146_vv *vv = dev->vv_data;
100 	struct v4l2_format fmt;
101 	int ret = 0, err = 0;
102 
103 	DEB_EE("dev:%p, fh:%p\n", dev, fh);
104 
105 	/* check if we have overlay information */
106 	if (vv->ov.fh == NULL) {
107 		DEB_D("no overlay data available. try S_FMT first.\n");
108 		return -EAGAIN;
109 	}
110 
111 	/* check if streaming capture is running */
112 	if (IS_CAPTURE_ACTIVE(fh) != 0) {
113 		DEB_D("streaming capture is active\n");
114 		return -EBUSY;
115 	}
116 
117 	/* check if overlay is running */
118 	if (IS_OVERLAY_ACTIVE(fh) != 0) {
119 		if (vv->video_fh == fh) {
120 			DEB_D("overlay is already active\n");
121 			return 0;
122 		}
123 		DEB_D("overlay is already active in another open\n");
124 		return -EBUSY;
125 	}
126 
127 	if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
128 		DEB_D("cannot get necessary overlay resources\n");
129 		return -EBUSY;
130 	}
131 
132 	fmt.fmt.win = vv->ov.win;
133 	err = vidioc_try_fmt_vid_overlay(NULL, fh, &fmt);
134 	if (0 != err) {
135 		saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
136 		return -EBUSY;
137 	}
138 	vv->ov.win = fmt.fmt.win;
139 
140 	DEB_D("%dx%d+%d+%d 0x%08x field=%s\n",
141 	      vv->ov.win.w.width, vv->ov.win.w.height,
142 	      vv->ov.win.w.left, vv->ov.win.w.top,
143 	      vv->ov_fmt->pixelformat, v4l2_field_names[vv->ov.win.field]);
144 
145 	if (0 != (ret = saa7146_enable_overlay(fh))) {
146 		DEB_D("enabling overlay failed: %d\n", ret);
147 		saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
148 		return ret;
149 	}
150 
151 	vv->video_status = STATUS_OVERLAY;
152 	vv->video_fh = fh;
153 
154 	return 0;
155 }
156 EXPORT_SYMBOL_GPL(saa7146_start_preview);
157 
158 int saa7146_stop_preview(struct saa7146_fh *fh)
159 {
160 	struct saa7146_dev *dev = fh->dev;
161 	struct saa7146_vv *vv = dev->vv_data;
162 
163 	DEB_EE("dev:%p, fh:%p\n", dev, fh);
164 
165 	/* check if streaming capture is running */
166 	if (IS_CAPTURE_ACTIVE(fh) != 0) {
167 		DEB_D("streaming capture is active\n");
168 		return -EBUSY;
169 	}
170 
171 	/* check if overlay is running at all */
172 	if ((vv->video_status & STATUS_OVERLAY) == 0) {
173 		DEB_D("no active overlay\n");
174 		return 0;
175 	}
176 
177 	if (vv->video_fh != fh) {
178 		DEB_D("overlay is active, but in another open\n");
179 		return -EBUSY;
180 	}
181 
182 	vv->video_status = 0;
183 	vv->video_fh = NULL;
184 
185 	saa7146_disable_overlay(fh);
186 
187 	saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
188 
189 	return 0;
190 }
191 EXPORT_SYMBOL_GPL(saa7146_stop_preview);
192 
193 /********************************************************************************/
194 /* common pagetable functions */
195 
196 static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
197 {
198 	struct pci_dev *pci = dev->pci;
199 	struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
200 	struct scatterlist *list = dma->sglist;
201 	int length = dma->sglen;
202 	struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
203 
204 	DEB_EE("dev:%p, buf:%p, sg_len:%d\n", dev, buf, length);
205 
206 	if( 0 != IS_PLANAR(sfmt->trans)) {
207 		struct saa7146_pgtable *pt1 = &buf->pt[0];
208 		struct saa7146_pgtable *pt2 = &buf->pt[1];
209 		struct saa7146_pgtable *pt3 = &buf->pt[2];
210 		__le32  *ptr1, *ptr2, *ptr3;
211 		__le32 fill;
212 
213 		int size = buf->fmt->width*buf->fmt->height;
214 		int i,p,m1,m2,m3,o1,o2;
215 
216 		switch( sfmt->depth ) {
217 			case 12: {
218 				/* create some offsets inside the page table */
219 				m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
220 				m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
221 				m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
222 				o1 = size%PAGE_SIZE;
223 				o2 = (size+(size/4))%PAGE_SIZE;
224 				DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",
225 					size, m1, m2, m3, o1, o2);
226 				break;
227 			}
228 			case 16: {
229 				/* create some offsets inside the page table */
230 				m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
231 				m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
232 				m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
233 				o1 = size%PAGE_SIZE;
234 				o2 = (size+(size/2))%PAGE_SIZE;
235 				DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",
236 					size, m1, m2, m3, o1, o2);
237 				break;
238 			}
239 			default: {
240 				return -1;
241 			}
242 		}
243 
244 		ptr1 = pt1->cpu;
245 		ptr2 = pt2->cpu;
246 		ptr3 = pt3->cpu;
247 
248 		/* walk all pages, copy all page addresses to ptr1 */
249 		for (i = 0; i < length; i++, list++) {
250 			for (p = 0; p * 4096 < sg_dma_len(list); p++, ptr1++)
251 				*ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
252 		}
253 /*
254 		ptr1 = pt1->cpu;
255 		for(j=0;j<40;j++) {
256 			printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
257 		}
258 */
259 
260 		/* if we have a user buffer, the first page may not be
261 		   aligned to a page boundary. */
262 		pt1->offset = dma->sglist->offset;
263 		pt2->offset = pt1->offset+o1;
264 		pt3->offset = pt1->offset+o2;
265 
266 		/* create video-dma2 page table */
267 		ptr1 = pt1->cpu;
268 		for(i = m1; i <= m2 ; i++, ptr2++) {
269 			*ptr2 = ptr1[i];
270 		}
271 		fill = *(ptr2-1);
272 		for(;i<1024;i++,ptr2++) {
273 			*ptr2 = fill;
274 		}
275 		/* create video-dma3 page table */
276 		ptr1 = pt1->cpu;
277 		for(i = m2; i <= m3; i++,ptr3++) {
278 			*ptr3 = ptr1[i];
279 		}
280 		fill = *(ptr3-1);
281 		for(;i<1024;i++,ptr3++) {
282 			*ptr3 = fill;
283 		}
284 		/* finally: finish up video-dma1 page table */
285 		ptr1 = pt1->cpu+m1;
286 		fill = pt1->cpu[m1];
287 		for(i=m1;i<1024;i++,ptr1++) {
288 			*ptr1 = fill;
289 		}
290 /*
291 		ptr1 = pt1->cpu;
292 		ptr2 = pt2->cpu;
293 		ptr3 = pt3->cpu;
294 		for(j=0;j<40;j++) {
295 			printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
296 		}
297 		for(j=0;j<40;j++) {
298 			printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
299 		}
300 		for(j=0;j<40;j++) {
301 			printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
302 		}
303 */
304 	} else {
305 		struct saa7146_pgtable *pt = &buf->pt[0];
306 		return saa7146_pgtable_build_single(pci, pt, list, length);
307 	}
308 
309 	return 0;
310 }
311 
312 
313 /********************************************************************************/
314 /* file operations */
315 
316 static int video_begin(struct saa7146_fh *fh)
317 {
318 	struct saa7146_dev *dev = fh->dev;
319 	struct saa7146_vv *vv = dev->vv_data;
320 	struct saa7146_format *fmt = NULL;
321 	unsigned int resource;
322 	int ret = 0, err = 0;
323 
324 	DEB_EE("dev:%p, fh:%p\n", dev, fh);
325 
326 	if ((vv->video_status & STATUS_CAPTURE) != 0) {
327 		if (vv->video_fh == fh) {
328 			DEB_S("already capturing\n");
329 			return 0;
330 		}
331 		DEB_S("already capturing in another open\n");
332 		return -EBUSY;
333 	}
334 
335 	if ((vv->video_status & STATUS_OVERLAY) != 0) {
336 		DEB_S("warning: suspending overlay video for streaming capture\n");
337 		vv->ov_suspend = vv->video_fh;
338 		err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
339 		if (0 != err) {
340 			DEB_D("suspending video failed. aborting\n");
341 			return err;
342 		}
343 	}
344 
345 	fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat);
346 	/* we need to have a valid format set here */
347 	if (!fmt)
348 		return -EINVAL;
349 
350 	if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
351 		resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
352 	} else {
353 		resource = RESOURCE_DMA1_HPS;
354 	}
355 
356 	ret = saa7146_res_get(fh, resource);
357 	if (0 == ret) {
358 		DEB_S("cannot get capture resource %d\n", resource);
359 		if (vv->ov_suspend != NULL) {
360 			saa7146_start_preview(vv->ov_suspend);
361 			vv->ov_suspend = NULL;
362 		}
363 		return -EBUSY;
364 	}
365 
366 	/* clear out beginning of streaming bit (rps register 0)*/
367 	saa7146_write(dev, MC2, MASK_27 );
368 
369 	/* enable rps0 irqs */
370 	SAA7146_IER_ENABLE(dev, MASK_27);
371 
372 	vv->video_fh = fh;
373 	vv->video_status = STATUS_CAPTURE;
374 
375 	return 0;
376 }
377 
378 static int video_end(struct saa7146_fh *fh, struct file *file)
379 {
380 	struct saa7146_dev *dev = fh->dev;
381 	struct saa7146_vv *vv = dev->vv_data;
382 	struct saa7146_dmaqueue *q = &vv->video_dmaq;
383 	struct saa7146_format *fmt = NULL;
384 	unsigned long flags;
385 	unsigned int resource;
386 	u32 dmas = 0;
387 	DEB_EE("dev:%p, fh:%p\n", dev, fh);
388 
389 	if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
390 		DEB_S("not capturing\n");
391 		return 0;
392 	}
393 
394 	if (vv->video_fh != fh) {
395 		DEB_S("capturing, but in another open\n");
396 		return -EBUSY;
397 	}
398 
399 	fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat);
400 	/* we need to have a valid format set here */
401 	if (!fmt)
402 		return -EINVAL;
403 
404 	if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
405 		resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
406 		dmas = MASK_22 | MASK_21 | MASK_20;
407 	} else {
408 		resource = RESOURCE_DMA1_HPS;
409 		dmas = MASK_22;
410 	}
411 	spin_lock_irqsave(&dev->slock,flags);
412 
413 	/* disable rps0  */
414 	saa7146_write(dev, MC1, MASK_28);
415 
416 	/* disable rps0 irqs */
417 	SAA7146_IER_DISABLE(dev, MASK_27);
418 
419 	/* shut down all used video dma transfers */
420 	saa7146_write(dev, MC1, dmas);
421 
422 	if (q->curr)
423 		saa7146_buffer_finish(dev, q, VIDEOBUF_DONE);
424 
425 	spin_unlock_irqrestore(&dev->slock, flags);
426 
427 	vv->video_fh = NULL;
428 	vv->video_status = 0;
429 
430 	saa7146_res_free(fh, resource);
431 
432 	if (vv->ov_suspend != NULL) {
433 		saa7146_start_preview(vv->ov_suspend);
434 		vv->ov_suspend = NULL;
435 	}
436 
437 	return 0;
438 }
439 
440 static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
441 {
442 	struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
443 
444 	strscpy((char *)cap->driver, "saa7146 v4l2", sizeof(cap->driver));
445 	strscpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
446 	sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci));
447 	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY |
448 			    V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
449 			    V4L2_CAP_DEVICE_CAPS;
450 	cap->capabilities |= dev->ext_vv_data->capabilities;
451 	return 0;
452 }
453 
454 static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
455 {
456 	struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
457 	struct saa7146_vv *vv = dev->vv_data;
458 
459 	*fb = vv->ov_fb;
460 	fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
461 	fb->flags = V4L2_FBUF_FLAG_PRIMARY;
462 	return 0;
463 }
464 
465 static int vidioc_s_fbuf(struct file *file, void *fh, const struct v4l2_framebuffer *fb)
466 {
467 	struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
468 	struct saa7146_vv *vv = dev->vv_data;
469 	struct saa7146_format *fmt;
470 
471 	DEB_EE("VIDIOC_S_FBUF\n");
472 
473 	if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
474 		return -EPERM;
475 
476 	/* check args */
477 	fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat);
478 	if (NULL == fmt)
479 		return -EINVAL;
480 
481 	/* planar formats are not allowed for overlay video, clipping and video dma would clash */
482 	if (fmt->flags & FORMAT_IS_PLANAR)
483 		DEB_S("planar pixelformat '%4.4s' not allowed for overlay\n",
484 		      (char *)&fmt->pixelformat);
485 
486 	/* check if overlay is running */
487 	if (IS_OVERLAY_ACTIVE(fh) != 0) {
488 		if (vv->video_fh != fh) {
489 			DEB_D("refusing to change framebuffer information while overlay is active in another open\n");
490 			return -EBUSY;
491 		}
492 	}
493 
494 	/* ok, accept it */
495 	vv->ov_fb = *fb;
496 	vv->ov_fmt = fmt;
497 
498 	if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) {
499 		vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8;
500 		DEB_D("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline);
501 	}
502 	return 0;
503 }
504 
505 static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
506 {
507 	if (f->index >= ARRAY_SIZE(formats))
508 		return -EINVAL;
509 	f->pixelformat = formats[f->index].pixelformat;
510 	return 0;
511 }
512 
513 int saa7146_s_ctrl(struct v4l2_ctrl *ctrl)
514 {
515 	struct saa7146_dev *dev = container_of(ctrl->handler,
516 				struct saa7146_dev, ctrl_handler);
517 	struct saa7146_vv *vv = dev->vv_data;
518 	u32 val;
519 
520 	switch (ctrl->id) {
521 	case V4L2_CID_BRIGHTNESS:
522 		val = saa7146_read(dev, BCS_CTRL);
523 		val &= 0x00ffffff;
524 		val |= (ctrl->val << 24);
525 		saa7146_write(dev, BCS_CTRL, val);
526 		saa7146_write(dev, MC2, MASK_22 | MASK_06);
527 		break;
528 
529 	case V4L2_CID_CONTRAST:
530 		val = saa7146_read(dev, BCS_CTRL);
531 		val &= 0xff00ffff;
532 		val |= (ctrl->val << 16);
533 		saa7146_write(dev, BCS_CTRL, val);
534 		saa7146_write(dev, MC2, MASK_22 | MASK_06);
535 		break;
536 
537 	case V4L2_CID_SATURATION:
538 		val = saa7146_read(dev, BCS_CTRL);
539 		val &= 0xffffff00;
540 		val |= (ctrl->val << 0);
541 		saa7146_write(dev, BCS_CTRL, val);
542 		saa7146_write(dev, MC2, MASK_22 | MASK_06);
543 		break;
544 
545 	case V4L2_CID_HFLIP:
546 		/* fixme: we can support changing VFLIP and HFLIP here... */
547 		if ((vv->video_status & STATUS_CAPTURE))
548 			return -EBUSY;
549 		vv->hflip = ctrl->val;
550 		break;
551 
552 	case V4L2_CID_VFLIP:
553 		if ((vv->video_status & STATUS_CAPTURE))
554 			return -EBUSY;
555 		vv->vflip = ctrl->val;
556 		break;
557 
558 	default:
559 		return -EINVAL;
560 	}
561 
562 	if ((vv->video_status & STATUS_OVERLAY) != 0) { /* CHECK: && (vv->video_fh == fh)) */
563 		struct saa7146_fh *fh = vv->video_fh;
564 
565 		saa7146_stop_preview(fh);
566 		saa7146_start_preview(fh);
567 	}
568 	return 0;
569 }
570 
571 static int vidioc_g_parm(struct file *file, void *fh,
572 		struct v4l2_streamparm *parm)
573 {
574 	struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
575 	struct saa7146_vv *vv = dev->vv_data;
576 
577 	if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
578 		return -EINVAL;
579 	parm->parm.capture.readbuffers = 1;
580 	v4l2_video_std_frame_period(vv->standard->id,
581 				    &parm->parm.capture.timeperframe);
582 	return 0;
583 }
584 
585 static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
586 {
587 	struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
588 	struct saa7146_vv *vv = dev->vv_data;
589 
590 	f->fmt.pix = vv->video_fmt;
591 	return 0;
592 }
593 
594 static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
595 {
596 	struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
597 	struct saa7146_vv *vv = dev->vv_data;
598 
599 	f->fmt.win = vv->ov.win;
600 	return 0;
601 }
602 
603 static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f)
604 {
605 	struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
606 	struct saa7146_vv *vv = dev->vv_data;
607 
608 	f->fmt.vbi = vv->vbi_fmt;
609 	return 0;
610 }
611 
612 static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
613 {
614 	struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
615 	struct saa7146_vv *vv = dev->vv_data;
616 	struct saa7146_format *fmt;
617 	enum v4l2_field field;
618 	int maxw, maxh;
619 	int calc_bpl;
620 
621 	DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
622 
623 	fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat);
624 	if (NULL == fmt)
625 		return -EINVAL;
626 
627 	field = f->fmt.pix.field;
628 	maxw  = vv->standard->h_max_out;
629 	maxh  = vv->standard->v_max_out;
630 
631 	if (V4L2_FIELD_ANY == field) {
632 		field = (f->fmt.pix.height > maxh / 2)
633 			? V4L2_FIELD_INTERLACED
634 			: V4L2_FIELD_BOTTOM;
635 	}
636 	switch (field) {
637 	case V4L2_FIELD_ALTERNATE:
638 		vv->last_field = V4L2_FIELD_TOP;
639 		maxh = maxh / 2;
640 		break;
641 	case V4L2_FIELD_TOP:
642 	case V4L2_FIELD_BOTTOM:
643 		vv->last_field = V4L2_FIELD_INTERLACED;
644 		maxh = maxh / 2;
645 		break;
646 	case V4L2_FIELD_INTERLACED:
647 		vv->last_field = V4L2_FIELD_INTERLACED;
648 		break;
649 	default:
650 		DEB_D("no known field mode '%d'\n", field);
651 		return -EINVAL;
652 	}
653 
654 	f->fmt.pix.field = field;
655 	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
656 	if (f->fmt.pix.width > maxw)
657 		f->fmt.pix.width = maxw;
658 	if (f->fmt.pix.height > maxh)
659 		f->fmt.pix.height = maxh;
660 
661 	calc_bpl = (f->fmt.pix.width * fmt->depth) / 8;
662 
663 	if (f->fmt.pix.bytesperline < calc_bpl)
664 		f->fmt.pix.bytesperline = calc_bpl;
665 
666 	if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */
667 		f->fmt.pix.bytesperline = calc_bpl;
668 
669 	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
670 	DEB_D("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n",
671 	      f->fmt.pix.width, f->fmt.pix.height,
672 	      f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
673 
674 	return 0;
675 }
676 
677 
678 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
679 {
680 	struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
681 	struct saa7146_vv *vv = dev->vv_data;
682 	struct v4l2_window *win = &f->fmt.win;
683 	enum v4l2_field field;
684 	int maxw, maxh;
685 
686 	DEB_EE("dev:%p\n", dev);
687 
688 	if (NULL == vv->ov_fb.base) {
689 		DEB_D("no fb base set\n");
690 		return -EINVAL;
691 	}
692 	if (NULL == vv->ov_fmt) {
693 		DEB_D("no fb fmt set\n");
694 		return -EINVAL;
695 	}
696 	if (win->w.width < 48 || win->w.height < 32) {
697 		DEB_D("min width/height. (%d,%d)\n",
698 		      win->w.width, win->w.height);
699 		return -EINVAL;
700 	}
701 	if (win->clipcount > 16) {
702 		DEB_D("clipcount too big\n");
703 		return -EINVAL;
704 	}
705 
706 	field = win->field;
707 	maxw  = vv->standard->h_max_out;
708 	maxh  = vv->standard->v_max_out;
709 
710 	if (V4L2_FIELD_ANY == field) {
711 		field = (win->w.height > maxh / 2)
712 			? V4L2_FIELD_INTERLACED
713 			: V4L2_FIELD_TOP;
714 		}
715 	switch (field) {
716 	case V4L2_FIELD_TOP:
717 	case V4L2_FIELD_BOTTOM:
718 	case V4L2_FIELD_ALTERNATE:
719 		maxh = maxh / 2;
720 		break;
721 	case V4L2_FIELD_INTERLACED:
722 		break;
723 	default:
724 		DEB_D("no known field mode '%d'\n", field);
725 		return -EINVAL;
726 	}
727 
728 	win->field = field;
729 	if (win->w.width > maxw)
730 		win->w.width = maxw;
731 	if (win->w.height > maxh)
732 		win->w.height = maxh;
733 
734 	return 0;
735 }
736 
737 static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f)
738 {
739 	struct saa7146_fh *fh = __fh;
740 	struct saa7146_dev *dev = fh->dev;
741 	struct saa7146_vv *vv = dev->vv_data;
742 	int err;
743 
744 	DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
745 	if (IS_CAPTURE_ACTIVE(fh) != 0) {
746 		DEB_EE("streaming capture is active\n");
747 		return -EBUSY;
748 	}
749 	err = vidioc_try_fmt_vid_cap(file, fh, f);
750 	if (0 != err)
751 		return err;
752 	vv->video_fmt = f->fmt.pix;
753 	DEB_EE("set to pixelformat '%4.4s'\n",
754 	       (char *)&vv->video_fmt.pixelformat);
755 	return 0;
756 }
757 
758 static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f)
759 {
760 	struct saa7146_fh *fh = __fh;
761 	struct saa7146_dev *dev = fh->dev;
762 	struct saa7146_vv *vv = dev->vv_data;
763 	int err;
764 
765 	DEB_EE("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh);
766 	err = vidioc_try_fmt_vid_overlay(file, fh, f);
767 	if (0 != err)
768 		return err;
769 	vv->ov.win    = f->fmt.win;
770 	vv->ov.nclips = f->fmt.win.clipcount;
771 	if (vv->ov.nclips > 16)
772 		vv->ov.nclips = 16;
773 	memcpy(vv->ov.clips, f->fmt.win.clips,
774 	       sizeof(struct v4l2_clip) * vv->ov.nclips);
775 
776 	/* vv->ov.fh is used to indicate that we have valid overlay information, too */
777 	vv->ov.fh = fh;
778 
779 	/* check if our current overlay is active */
780 	if (IS_OVERLAY_ACTIVE(fh) != 0) {
781 		saa7146_stop_preview(fh);
782 		saa7146_start_preview(fh);
783 	}
784 	return 0;
785 }
786 
787 static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm)
788 {
789 	struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
790 	struct saa7146_vv *vv = dev->vv_data;
791 
792 	*norm = vv->standard->id;
793 	return 0;
794 }
795 
796 	/* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
797 	   PAL / NTSC / SECAM. if your hardware does not (or does more)
798 	   -- override this function in your extension */
799 /*
800 	case VIDIOC_ENUMSTD:
801 	{
802 		struct v4l2_standard *e = arg;
803 		if (e->index < 0 )
804 			return -EINVAL;
805 		if( e->index < dev->ext_vv_data->num_stds ) {
806 			DEB_EE("VIDIOC_ENUMSTD: index:%d\n", e->index);
807 			v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
808 			return 0;
809 		}
810 		return -EINVAL;
811 	}
812 	*/
813 
814 static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id id)
815 {
816 	struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
817 	struct saa7146_vv *vv = dev->vv_data;
818 	int found = 0;
819 	int err, i;
820 
821 	DEB_EE("VIDIOC_S_STD\n");
822 
823 	if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
824 		DEB_D("cannot change video standard while streaming capture is active\n");
825 		return -EBUSY;
826 	}
827 
828 	if ((vv->video_status & STATUS_OVERLAY) != 0) {
829 		vv->ov_suspend = vv->video_fh;
830 		err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
831 		if (0 != err) {
832 			DEB_D("suspending video failed. aborting\n");
833 			return err;
834 		}
835 	}
836 
837 	for (i = 0; i < dev->ext_vv_data->num_stds; i++)
838 		if (id & dev->ext_vv_data->stds[i].id)
839 			break;
840 	if (i != dev->ext_vv_data->num_stds) {
841 		vv->standard = &dev->ext_vv_data->stds[i];
842 		if (NULL != dev->ext_vv_data->std_callback)
843 			dev->ext_vv_data->std_callback(dev, vv->standard);
844 		found = 1;
845 	}
846 
847 	if (vv->ov_suspend != NULL) {
848 		saa7146_start_preview(vv->ov_suspend);
849 		vv->ov_suspend = NULL;
850 	}
851 
852 	if (!found) {
853 		DEB_EE("VIDIOC_S_STD: standard not found\n");
854 		return -EINVAL;
855 	}
856 
857 	DEB_EE("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name);
858 	return 0;
859 }
860 
861 static int vidioc_overlay(struct file *file, void *fh, unsigned int on)
862 {
863 	int err;
864 
865 	DEB_D("VIDIOC_OVERLAY on:%d\n", on);
866 	if (on)
867 		err = saa7146_start_preview(fh);
868 	else
869 		err = saa7146_stop_preview(fh);
870 	return err;
871 }
872 
873 static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b)
874 {
875 	struct saa7146_fh *fh = __fh;
876 
877 	if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
878 		return videobuf_reqbufs(&fh->video_q, b);
879 	if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE)
880 		return videobuf_reqbufs(&fh->vbi_q, b);
881 	return -EINVAL;
882 }
883 
884 static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
885 {
886 	struct saa7146_fh *fh = __fh;
887 
888 	if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
889 		return videobuf_querybuf(&fh->video_q, buf);
890 	if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
891 		return videobuf_querybuf(&fh->vbi_q, buf);
892 	return -EINVAL;
893 }
894 
895 static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
896 {
897 	struct saa7146_fh *fh = __fh;
898 
899 	if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
900 		return videobuf_qbuf(&fh->video_q, buf);
901 	if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
902 		return videobuf_qbuf(&fh->vbi_q, buf);
903 	return -EINVAL;
904 }
905 
906 static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
907 {
908 	struct saa7146_fh *fh = __fh;
909 
910 	if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
911 		return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK);
912 	if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
913 		return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK);
914 	return -EINVAL;
915 }
916 
917 static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
918 {
919 	struct saa7146_fh *fh = __fh;
920 	int err;
921 
922 	DEB_D("VIDIOC_STREAMON, type:%d\n", type);
923 
924 	err = video_begin(fh);
925 	if (err)
926 		return err;
927 	if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
928 		return videobuf_streamon(&fh->video_q);
929 	if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
930 		return videobuf_streamon(&fh->vbi_q);
931 	return -EINVAL;
932 }
933 
934 static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
935 {
936 	struct saa7146_fh *fh = __fh;
937 	struct saa7146_dev *dev = fh->dev;
938 	struct saa7146_vv *vv = dev->vv_data;
939 	int err;
940 
941 	DEB_D("VIDIOC_STREAMOFF, type:%d\n", type);
942 
943 	/* ugly: we need to copy some checks from video_end(),
944 	   because videobuf_streamoff() relies on the capture running.
945 	   check and fix this */
946 	if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
947 		DEB_S("not capturing\n");
948 		return 0;
949 	}
950 
951 	if (vv->video_fh != fh) {
952 		DEB_S("capturing, but in another open\n");
953 		return -EBUSY;
954 	}
955 
956 	err = -EINVAL;
957 	if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
958 		err = videobuf_streamoff(&fh->video_q);
959 	else if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
960 		err = videobuf_streamoff(&fh->vbi_q);
961 	if (0 != err) {
962 		DEB_D("warning: videobuf_streamoff() failed\n");
963 		video_end(fh, file);
964 	} else {
965 		err = video_end(fh, file);
966 	}
967 	return err;
968 }
969 
970 const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
971 	.vidioc_querycap             = vidioc_querycap,
972 	.vidioc_enum_fmt_vid_cap     = vidioc_enum_fmt_vid_cap,
973 	.vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap,
974 	.vidioc_g_fmt_vid_cap        = vidioc_g_fmt_vid_cap,
975 	.vidioc_try_fmt_vid_cap      = vidioc_try_fmt_vid_cap,
976 	.vidioc_s_fmt_vid_cap        = vidioc_s_fmt_vid_cap,
977 	.vidioc_g_fmt_vid_overlay    = vidioc_g_fmt_vid_overlay,
978 	.vidioc_try_fmt_vid_overlay  = vidioc_try_fmt_vid_overlay,
979 	.vidioc_s_fmt_vid_overlay    = vidioc_s_fmt_vid_overlay,
980 
981 	.vidioc_overlay		     = vidioc_overlay,
982 	.vidioc_g_fbuf		     = vidioc_g_fbuf,
983 	.vidioc_s_fbuf		     = vidioc_s_fbuf,
984 	.vidioc_reqbufs              = vidioc_reqbufs,
985 	.vidioc_querybuf             = vidioc_querybuf,
986 	.vidioc_qbuf                 = vidioc_qbuf,
987 	.vidioc_dqbuf                = vidioc_dqbuf,
988 	.vidioc_g_std                = vidioc_g_std,
989 	.vidioc_s_std                = vidioc_s_std,
990 	.vidioc_streamon             = vidioc_streamon,
991 	.vidioc_streamoff            = vidioc_streamoff,
992 	.vidioc_g_parm		     = vidioc_g_parm,
993 	.vidioc_subscribe_event      = v4l2_ctrl_subscribe_event,
994 	.vidioc_unsubscribe_event    = v4l2_event_unsubscribe,
995 };
996 
997 const struct v4l2_ioctl_ops saa7146_vbi_ioctl_ops = {
998 	.vidioc_querycap             = vidioc_querycap,
999 	.vidioc_g_fmt_vbi_cap        = vidioc_g_fmt_vbi_cap,
1000 
1001 	.vidioc_reqbufs              = vidioc_reqbufs,
1002 	.vidioc_querybuf             = vidioc_querybuf,
1003 	.vidioc_qbuf                 = vidioc_qbuf,
1004 	.vidioc_dqbuf                = vidioc_dqbuf,
1005 	.vidioc_g_std                = vidioc_g_std,
1006 	.vidioc_s_std                = vidioc_s_std,
1007 	.vidioc_streamon             = vidioc_streamon,
1008 	.vidioc_streamoff            = vidioc_streamoff,
1009 	.vidioc_g_parm		     = vidioc_g_parm,
1010 	.vidioc_subscribe_event      = v4l2_ctrl_subscribe_event,
1011 	.vidioc_unsubscribe_event    = v4l2_event_unsubscribe,
1012 };
1013 
1014 /*********************************************************************************/
1015 /* buffer handling functions                                                  */
1016 
1017 static int buffer_activate (struct saa7146_dev *dev,
1018 		     struct saa7146_buf *buf,
1019 		     struct saa7146_buf *next)
1020 {
1021 	struct saa7146_vv *vv = dev->vv_data;
1022 
1023 	buf->vb.state = VIDEOBUF_ACTIVE;
1024 	saa7146_set_capture(dev,buf,next);
1025 
1026 	mod_timer(&vv->video_dmaq.timeout, jiffies+BUFFER_TIMEOUT);
1027 	return 0;
1028 }
1029 
1030 static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf)
1031 {
1032 	saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1033 	saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1034 	saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1035 }
1036 
1037 static int buffer_prepare(struct videobuf_queue *q,
1038 			  struct videobuf_buffer *vb, enum v4l2_field field)
1039 {
1040 	struct file *file = q->priv_data;
1041 	struct saa7146_fh *fh = file->private_data;
1042 	struct saa7146_dev *dev = fh->dev;
1043 	struct saa7146_vv *vv = dev->vv_data;
1044 	struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1045 	int size,err = 0;
1046 
1047 	DEB_CAP("vbuf:%p\n", vb);
1048 
1049 	/* sanity checks */
1050 	if (vv->video_fmt.width  < 48 ||
1051 	    vv->video_fmt.height < 32 ||
1052 	    vv->video_fmt.width  > vv->standard->h_max_out ||
1053 	    vv->video_fmt.height > vv->standard->v_max_out) {
1054 		DEB_D("w (%d) / h (%d) out of bounds\n",
1055 		      vv->video_fmt.width, vv->video_fmt.height);
1056 		return -EINVAL;
1057 	}
1058 
1059 	size = vv->video_fmt.sizeimage;
1060 	if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1061 		DEB_D("size mismatch\n");
1062 		return -EINVAL;
1063 	}
1064 
1065 	DEB_CAP("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1066 		vv->video_fmt.width, vv->video_fmt.height,
1067 		size, v4l2_field_names[vv->video_fmt.field]);
1068 	if (buf->vb.width  != vv->video_fmt.width  ||
1069 	    buf->vb.bytesperline != vv->video_fmt.bytesperline ||
1070 	    buf->vb.height != vv->video_fmt.height ||
1071 	    buf->vb.size   != size ||
1072 	    buf->vb.field  != field      ||
1073 	    buf->vb.field  != vv->video_fmt.field  ||
1074 	    buf->fmt       != &vv->video_fmt) {
1075 		saa7146_dma_free(dev,q,buf);
1076 	}
1077 
1078 	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1079 		struct saa7146_format *sfmt;
1080 
1081 		buf->vb.bytesperline  = vv->video_fmt.bytesperline;
1082 		buf->vb.width  = vv->video_fmt.width;
1083 		buf->vb.height = vv->video_fmt.height;
1084 		buf->vb.size   = size;
1085 		buf->vb.field  = field;
1086 		buf->fmt       = &vv->video_fmt;
1087 		buf->vb.field  = vv->video_fmt.field;
1088 
1089 		sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
1090 
1091 		release_all_pagetables(dev, buf);
1092 		if( 0 != IS_PLANAR(sfmt->trans)) {
1093 			saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1094 			saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1095 			saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1096 		} else {
1097 			saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1098 		}
1099 
1100 		err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1101 		if (err)
1102 			goto oops;
1103 		err = saa7146_pgtable_build(dev,buf);
1104 		if (err)
1105 			goto oops;
1106 	}
1107 	buf->vb.state = VIDEOBUF_PREPARED;
1108 	buf->activate = buffer_activate;
1109 
1110 	return 0;
1111 
1112  oops:
1113 	DEB_D("error out\n");
1114 	saa7146_dma_free(dev,q,buf);
1115 
1116 	return err;
1117 }
1118 
1119 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1120 {
1121 	struct file *file = q->priv_data;
1122 	struct saa7146_fh *fh = file->private_data;
1123 	struct saa7146_vv *vv = fh->dev->vv_data;
1124 
1125 	if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1126 		*count = MAX_SAA7146_CAPTURE_BUFFERS;
1127 
1128 	*size = vv->video_fmt.sizeimage;
1129 
1130 	/* check if we exceed the "max_memory" parameter */
1131 	if( (*count * *size) > (max_memory*1048576) ) {
1132 		*count = (max_memory*1048576) / *size;
1133 	}
1134 
1135 	DEB_CAP("%d buffers, %d bytes each\n", *count, *size);
1136 
1137 	return 0;
1138 }
1139 
1140 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1141 {
1142 	struct file *file = q->priv_data;
1143 	struct saa7146_fh *fh = file->private_data;
1144 	struct saa7146_dev *dev = fh->dev;
1145 	struct saa7146_vv *vv = dev->vv_data;
1146 	struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1147 
1148 	DEB_CAP("vbuf:%p\n", vb);
1149 	saa7146_buffer_queue(fh->dev, &vv->video_dmaq, buf);
1150 }
1151 
1152 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1153 {
1154 	struct file *file = q->priv_data;
1155 	struct saa7146_fh *fh = file->private_data;
1156 	struct saa7146_dev *dev = fh->dev;
1157 	struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1158 
1159 	DEB_CAP("vbuf:%p\n", vb);
1160 
1161 	saa7146_dma_free(dev,q,buf);
1162 
1163 	release_all_pagetables(dev, buf);
1164 }
1165 
1166 static const struct videobuf_queue_ops video_qops = {
1167 	.buf_setup    = buffer_setup,
1168 	.buf_prepare  = buffer_prepare,
1169 	.buf_queue    = buffer_queue,
1170 	.buf_release  = buffer_release,
1171 };
1172 
1173 /********************************************************************************/
1174 /* file operations */
1175 
1176 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1177 {
1178 	INIT_LIST_HEAD(&vv->video_dmaq.queue);
1179 
1180 	timer_setup(&vv->video_dmaq.timeout, saa7146_buffer_timeout, 0);
1181 	vv->video_dmaq.dev              = dev;
1182 
1183 	/* set some default values */
1184 	vv->standard = &dev->ext_vv_data->stds[0];
1185 
1186 	/* FIXME: what's this? */
1187 	vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1188 	vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1189 }
1190 
1191 
1192 static int video_open(struct saa7146_dev *dev, struct file *file)
1193 {
1194 	struct saa7146_fh *fh = file->private_data;
1195 
1196 	videobuf_queue_sg_init(&fh->video_q, &video_qops,
1197 			    &dev->pci->dev, &dev->slock,
1198 			    V4L2_BUF_TYPE_VIDEO_CAPTURE,
1199 			    V4L2_FIELD_INTERLACED,
1200 			    sizeof(struct saa7146_buf),
1201 			    file, &dev->v4l2_lock);
1202 
1203 	return 0;
1204 }
1205 
1206 
1207 static void video_close(struct saa7146_dev *dev, struct file *file)
1208 {
1209 	struct saa7146_fh *fh = file->private_data;
1210 	struct saa7146_vv *vv = dev->vv_data;
1211 	struct videobuf_queue *q = &fh->video_q;
1212 
1213 	if (IS_CAPTURE_ACTIVE(fh) != 0)
1214 		video_end(fh, file);
1215 	else if (IS_OVERLAY_ACTIVE(fh) != 0)
1216 		saa7146_stop_preview(fh);
1217 
1218 	videobuf_stop(q);
1219 	/* hmm, why is this function declared void? */
1220 }
1221 
1222 
1223 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1224 {
1225 	struct saa7146_vv *vv = dev->vv_data;
1226 	struct saa7146_dmaqueue *q = &vv->video_dmaq;
1227 
1228 	spin_lock(&dev->slock);
1229 	DEB_CAP("called\n");
1230 
1231 	/* only finish the buffer if we have one... */
1232 	if( NULL != q->curr ) {
1233 		saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1234 	}
1235 	saa7146_buffer_next(dev,q,0);
1236 
1237 	spin_unlock(&dev->slock);
1238 }
1239 
1240 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1241 {
1242 	struct saa7146_fh *fh = file->private_data;
1243 	struct saa7146_dev *dev = fh->dev;
1244 	struct saa7146_vv *vv = dev->vv_data;
1245 	ssize_t ret = 0;
1246 
1247 	DEB_EE("called\n");
1248 
1249 	if ((vv->video_status & STATUS_CAPTURE) != 0) {
1250 		/* fixme: should we allow read() captures while streaming capture? */
1251 		if (vv->video_fh == fh) {
1252 			DEB_S("already capturing\n");
1253 			return -EBUSY;
1254 		}
1255 		DEB_S("already capturing in another open\n");
1256 		return -EBUSY;
1257 	}
1258 
1259 	ret = video_begin(fh);
1260 	if( 0 != ret) {
1261 		goto out;
1262 	}
1263 
1264 	ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1265 				file->f_flags & O_NONBLOCK);
1266 	if (ret != 0) {
1267 		video_end(fh, file);
1268 	} else {
1269 		ret = video_end(fh, file);
1270 	}
1271 out:
1272 	/* restart overlay if it was active before */
1273 	if (vv->ov_suspend != NULL) {
1274 		saa7146_start_preview(vv->ov_suspend);
1275 		vv->ov_suspend = NULL;
1276 	}
1277 
1278 	return ret;
1279 }
1280 
1281 const struct saa7146_use_ops saa7146_video_uops = {
1282 	.init = video_init,
1283 	.open = video_open,
1284 	.release = video_close,
1285 	.irq_done = video_irq_done,
1286 	.read = video_read,
1287 };
1288