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Merge tag 'v4.5-rockchip-clkfixes1' of git://git.kernel.org/pub/scm/linux/kernel...
[deliverable/linux.git] / drivers / media / common / saa7146 / saa7146_video.c
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
8 static int max_memory = 32;
9
10 module_param(max_memory, int, 0644);
11 MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)");
12
13 #define IS_CAPTURE_ACTIVE(fh) \
14 (((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh))
15
16 #define IS_OVERLAY_ACTIVE(fh) \
17 (((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh))
18
19 /* format descriptions for capture and preview */
20 static struct saa7146_format formats[] = {
21 {
22 .name = "RGB-8 (3-3-2)",
23 .pixelformat = V4L2_PIX_FMT_RGB332,
24 .trans = RGB08_COMPOSED,
25 .depth = 8,
26 .flags = 0,
27 }, {
28 .name = "RGB-16 (5/B-6/G-5/R)",
29 .pixelformat = V4L2_PIX_FMT_RGB565,
30 .trans = RGB16_COMPOSED,
31 .depth = 16,
32 .flags = 0,
33 }, {
34 .name = "RGB-24 (B-G-R)",
35 .pixelformat = V4L2_PIX_FMT_BGR24,
36 .trans = RGB24_COMPOSED,
37 .depth = 24,
38 .flags = 0,
39 }, {
40 .name = "RGB-32 (B-G-R)",
41 .pixelformat = V4L2_PIX_FMT_BGR32,
42 .trans = RGB32_COMPOSED,
43 .depth = 32,
44 .flags = 0,
45 }, {
46 .name = "RGB-32 (R-G-B)",
47 .pixelformat = V4L2_PIX_FMT_RGB32,
48 .trans = RGB32_COMPOSED,
49 .depth = 32,
50 .flags = 0,
51 .swap = 0x2,
52 }, {
53 .name = "Greyscale-8",
54 .pixelformat = V4L2_PIX_FMT_GREY,
55 .trans = Y8,
56 .depth = 8,
57 .flags = 0,
58 }, {
59 .name = "YUV 4:2:2 planar (Y-Cb-Cr)",
60 .pixelformat = V4L2_PIX_FMT_YUV422P,
61 .trans = YUV422_DECOMPOSED,
62 .depth = 16,
63 .flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
64 }, {
65 .name = "YVU 4:2:0 planar (Y-Cb-Cr)",
66 .pixelformat = V4L2_PIX_FMT_YVU420,
67 .trans = YUV420_DECOMPOSED,
68 .depth = 12,
69 .flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
70 }, {
71 .name = "YUV 4:2:0 planar (Y-Cb-Cr)",
72 .pixelformat = V4L2_PIX_FMT_YUV420,
73 .trans = YUV420_DECOMPOSED,
74 .depth = 12,
75 .flags = FORMAT_IS_PLANAR,
76 }, {
77 .name = "YUV 4:2:2 (U-Y-V-Y)",
78 .pixelformat = V4L2_PIX_FMT_UYVY,
79 .trans = YUV422_COMPOSED,
80 .depth = 16,
81 .flags = 0,
82 }
83 };
84
85 /* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps.
86 due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped
87 (like V4L2_PIX_FMT_YUYV) ... 8-( */
88
89 static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
90
91 struct saa7146_format* saa7146_format_by_fourcc(struct saa7146_dev *dev, int fourcc)
92 {
93 int i, j = NUM_FORMATS;
94
95 for (i = 0; i < j; i++) {
96 if (formats[i].pixelformat == fourcc) {
97 return formats+i;
98 }
99 }
100
101 DEB_D("unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
102 return NULL;
103 }
104
105 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f);
106
107 int saa7146_start_preview(struct saa7146_fh *fh)
108 {
109 struct saa7146_dev *dev = fh->dev;
110 struct saa7146_vv *vv = dev->vv_data;
111 struct v4l2_format fmt;
112 int ret = 0, err = 0;
113
114 DEB_EE("dev:%p, fh:%p\n", dev, fh);
115
116 /* check if we have overlay information */
117 if (vv->ov.fh == NULL) {
118 DEB_D("no overlay data available. try S_FMT first.\n");
119 return -EAGAIN;
120 }
121
122 /* check if streaming capture is running */
123 if (IS_CAPTURE_ACTIVE(fh) != 0) {
124 DEB_D("streaming capture is active\n");
125 return -EBUSY;
126 }
127
128 /* check if overlay is running */
129 if (IS_OVERLAY_ACTIVE(fh) != 0) {
130 if (vv->video_fh == fh) {
131 DEB_D("overlay is already active\n");
132 return 0;
133 }
134 DEB_D("overlay is already active in another open\n");
135 return -EBUSY;
136 }
137
138 if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
139 DEB_D("cannot get necessary overlay resources\n");
140 return -EBUSY;
141 }
142
143 fmt.fmt.win = vv->ov.win;
144 err = vidioc_try_fmt_vid_overlay(NULL, fh, &fmt);
145 if (0 != err) {
146 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
147 return -EBUSY;
148 }
149 vv->ov.win = fmt.fmt.win;
150
151 DEB_D("%dx%d+%d+%d %s field=%s\n",
152 vv->ov.win.w.width, vv->ov.win.w.height,
153 vv->ov.win.w.left, vv->ov.win.w.top,
154 vv->ov_fmt->name, v4l2_field_names[vv->ov.win.field]);
155
156 if (0 != (ret = saa7146_enable_overlay(fh))) {
157 DEB_D("enabling overlay failed: %d\n", ret);
158 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
159 return ret;
160 }
161
162 vv->video_status = STATUS_OVERLAY;
163 vv->video_fh = fh;
164
165 return 0;
166 }
167 EXPORT_SYMBOL_GPL(saa7146_start_preview);
168
169 int saa7146_stop_preview(struct saa7146_fh *fh)
170 {
171 struct saa7146_dev *dev = fh->dev;
172 struct saa7146_vv *vv = dev->vv_data;
173
174 DEB_EE("dev:%p, fh:%p\n", dev, fh);
175
176 /* check if streaming capture is running */
177 if (IS_CAPTURE_ACTIVE(fh) != 0) {
178 DEB_D("streaming capture is active\n");
179 return -EBUSY;
180 }
181
182 /* check if overlay is running at all */
183 if ((vv->video_status & STATUS_OVERLAY) == 0) {
184 DEB_D("no active overlay\n");
185 return 0;
186 }
187
188 if (vv->video_fh != fh) {
189 DEB_D("overlay is active, but in another open\n");
190 return -EBUSY;
191 }
192
193 vv->video_status = 0;
194 vv->video_fh = NULL;
195
196 saa7146_disable_overlay(fh);
197
198 saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
199
200 return 0;
201 }
202 EXPORT_SYMBOL_GPL(saa7146_stop_preview);
203
204 /********************************************************************************/
205 /* common pagetable functions */
206
207 static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
208 {
209 struct pci_dev *pci = dev->pci;
210 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
211 struct scatterlist *list = dma->sglist;
212 int length = dma->sglen;
213 struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
214
215 DEB_EE("dev:%p, buf:%p, sg_len:%d\n", dev, buf, length);
216
217 if( 0 != IS_PLANAR(sfmt->trans)) {
218 struct saa7146_pgtable *pt1 = &buf->pt[0];
219 struct saa7146_pgtable *pt2 = &buf->pt[1];
220 struct saa7146_pgtable *pt3 = &buf->pt[2];
221 __le32 *ptr1, *ptr2, *ptr3;
222 __le32 fill;
223
224 int size = buf->fmt->width*buf->fmt->height;
225 int i,p,m1,m2,m3,o1,o2;
226
227 switch( sfmt->depth ) {
228 case 12: {
229 /* create some offsets inside the page table */
230 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
231 m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
232 m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
233 o1 = size%PAGE_SIZE;
234 o2 = (size+(size/4))%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 case 16: {
240 /* create some offsets inside the page table */
241 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
242 m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
243 m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
244 o1 = size%PAGE_SIZE;
245 o2 = (size+(size/2))%PAGE_SIZE;
246 DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",
247 size, m1, m2, m3, o1, o2);
248 break;
249 }
250 default: {
251 return -1;
252 }
253 }
254
255 ptr1 = pt1->cpu;
256 ptr2 = pt2->cpu;
257 ptr3 = pt3->cpu;
258
259 /* walk all pages, copy all page addresses to ptr1 */
260 for (i = 0; i < length; i++, list++) {
261 for (p = 0; p * 4096 < list->length; p++, ptr1++) {
262 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
263 }
264 }
265 /*
266 ptr1 = pt1->cpu;
267 for(j=0;j<40;j++) {
268 printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
269 }
270 */
271
272 /* if we have a user buffer, the first page may not be
273 aligned to a page boundary. */
274 pt1->offset = dma->sglist->offset;
275 pt2->offset = pt1->offset+o1;
276 pt3->offset = pt1->offset+o2;
277
278 /* create video-dma2 page table */
279 ptr1 = pt1->cpu;
280 for(i = m1; i <= m2 ; i++, ptr2++) {
281 *ptr2 = ptr1[i];
282 }
283 fill = *(ptr2-1);
284 for(;i<1024;i++,ptr2++) {
285 *ptr2 = fill;
286 }
287 /* create video-dma3 page table */
288 ptr1 = pt1->cpu;
289 for(i = m2; i <= m3; i++,ptr3++) {
290 *ptr3 = ptr1[i];
291 }
292 fill = *(ptr3-1);
293 for(;i<1024;i++,ptr3++) {
294 *ptr3 = fill;
295 }
296 /* finally: finish up video-dma1 page table */
297 ptr1 = pt1->cpu+m1;
298 fill = pt1->cpu[m1];
299 for(i=m1;i<1024;i++,ptr1++) {
300 *ptr1 = fill;
301 }
302 /*
303 ptr1 = pt1->cpu;
304 ptr2 = pt2->cpu;
305 ptr3 = pt3->cpu;
306 for(j=0;j<40;j++) {
307 printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
308 }
309 for(j=0;j<40;j++) {
310 printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
311 }
312 for(j=0;j<40;j++) {
313 printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
314 }
315 */
316 } else {
317 struct saa7146_pgtable *pt = &buf->pt[0];
318 return saa7146_pgtable_build_single(pci, pt, list, length);
319 }
320
321 return 0;
322 }
323
324
325 /********************************************************************************/
326 /* file operations */
327
328 static int video_begin(struct saa7146_fh *fh)
329 {
330 struct saa7146_dev *dev = fh->dev;
331 struct saa7146_vv *vv = dev->vv_data;
332 struct saa7146_format *fmt = NULL;
333 unsigned int resource;
334 int ret = 0, err = 0;
335
336 DEB_EE("dev:%p, fh:%p\n", dev, fh);
337
338 if ((vv->video_status & STATUS_CAPTURE) != 0) {
339 if (vv->video_fh == fh) {
340 DEB_S("already capturing\n");
341 return 0;
342 }
343 DEB_S("already capturing in another open\n");
344 return -EBUSY;
345 }
346
347 if ((vv->video_status & STATUS_OVERLAY) != 0) {
348 DEB_S("warning: suspending overlay video for streaming capture\n");
349 vv->ov_suspend = vv->video_fh;
350 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
351 if (0 != err) {
352 DEB_D("suspending video failed. aborting\n");
353 return err;
354 }
355 }
356
357 fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat);
358 /* we need to have a valid format set here */
359 BUG_ON(NULL == fmt);
360
361 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
362 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
363 } else {
364 resource = RESOURCE_DMA1_HPS;
365 }
366
367 ret = saa7146_res_get(fh, resource);
368 if (0 == ret) {
369 DEB_S("cannot get capture resource %d\n", resource);
370 if (vv->ov_suspend != NULL) {
371 saa7146_start_preview(vv->ov_suspend);
372 vv->ov_suspend = NULL;
373 }
374 return -EBUSY;
375 }
376
377 /* clear out beginning of streaming bit (rps register 0)*/
378 saa7146_write(dev, MC2, MASK_27 );
379
380 /* enable rps0 irqs */
381 SAA7146_IER_ENABLE(dev, MASK_27);
382
383 vv->video_fh = fh;
384 vv->video_status = STATUS_CAPTURE;
385
386 return 0;
387 }
388
389 static int video_end(struct saa7146_fh *fh, struct file *file)
390 {
391 struct saa7146_dev *dev = fh->dev;
392 struct saa7146_vv *vv = dev->vv_data;
393 struct saa7146_format *fmt = NULL;
394 unsigned long flags;
395 unsigned int resource;
396 u32 dmas = 0;
397 DEB_EE("dev:%p, fh:%p\n", dev, fh);
398
399 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
400 DEB_S("not capturing\n");
401 return 0;
402 }
403
404 if (vv->video_fh != fh) {
405 DEB_S("capturing, but in another open\n");
406 return -EBUSY;
407 }
408
409 fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat);
410 /* we need to have a valid format set here */
411 BUG_ON(NULL == fmt);
412
413 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
414 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
415 dmas = MASK_22 | MASK_21 | MASK_20;
416 } else {
417 resource = RESOURCE_DMA1_HPS;
418 dmas = MASK_22;
419 }
420 spin_lock_irqsave(&dev->slock,flags);
421
422 /* disable rps0 */
423 saa7146_write(dev, MC1, MASK_28);
424
425 /* disable rps0 irqs */
426 SAA7146_IER_DISABLE(dev, MASK_27);
427
428 /* shut down all used video dma transfers */
429 saa7146_write(dev, MC1, dmas);
430
431 spin_unlock_irqrestore(&dev->slock, flags);
432
433 vv->video_fh = NULL;
434 vv->video_status = 0;
435
436 saa7146_res_free(fh, resource);
437
438 if (vv->ov_suspend != NULL) {
439 saa7146_start_preview(vv->ov_suspend);
440 vv->ov_suspend = NULL;
441 }
442
443 return 0;
444 }
445
446 static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
447 {
448 struct video_device *vdev = video_devdata(file);
449 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
450
451 strcpy((char *)cap->driver, "saa7146 v4l2");
452 strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
453 sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci));
454 cap->device_caps =
455 V4L2_CAP_VIDEO_CAPTURE |
456 V4L2_CAP_VIDEO_OVERLAY |
457 V4L2_CAP_READWRITE |
458 V4L2_CAP_STREAMING;
459 cap->device_caps |= dev->ext_vv_data->capabilities;
460 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
461 if (vdev->vfl_type == VFL_TYPE_GRABBER)
462 cap->device_caps &=
463 ~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT);
464 else
465 cap->device_caps &=
466 ~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY | V4L2_CAP_AUDIO);
467 return 0;
468 }
469
470 static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
471 {
472 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
473 struct saa7146_vv *vv = dev->vv_data;
474
475 *fb = vv->ov_fb;
476 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
477 fb->flags = V4L2_FBUF_FLAG_PRIMARY;
478 return 0;
479 }
480
481 static int vidioc_s_fbuf(struct file *file, void *fh, const struct v4l2_framebuffer *fb)
482 {
483 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
484 struct saa7146_vv *vv = dev->vv_data;
485 struct saa7146_format *fmt;
486
487 DEB_EE("VIDIOC_S_FBUF\n");
488
489 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
490 return -EPERM;
491
492 /* check args */
493 fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat);
494 if (NULL == fmt)
495 return -EINVAL;
496
497 /* planar formats are not allowed for overlay video, clipping and video dma would clash */
498 if (fmt->flags & FORMAT_IS_PLANAR)
499 DEB_S("planar pixelformat '%4.4s' not allowed for overlay\n",
500 (char *)&fmt->pixelformat);
501
502 /* check if overlay is running */
503 if (IS_OVERLAY_ACTIVE(fh) != 0) {
504 if (vv->video_fh != fh) {
505 DEB_D("refusing to change framebuffer information while overlay is active in another open\n");
506 return -EBUSY;
507 }
508 }
509
510 /* ok, accept it */
511 vv->ov_fb = *fb;
512 vv->ov_fmt = fmt;
513
514 if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) {
515 vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8;
516 DEB_D("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline);
517 }
518 return 0;
519 }
520
521 static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
522 {
523 if (f->index >= NUM_FORMATS)
524 return -EINVAL;
525 strlcpy((char *)f->description, formats[f->index].name,
526 sizeof(f->description));
527 f->pixelformat = formats[f->index].pixelformat;
528 return 0;
529 }
530
531 int saa7146_s_ctrl(struct v4l2_ctrl *ctrl)
532 {
533 struct saa7146_dev *dev = container_of(ctrl->handler,
534 struct saa7146_dev, ctrl_handler);
535 struct saa7146_vv *vv = dev->vv_data;
536 u32 val;
537
538 switch (ctrl->id) {
539 case V4L2_CID_BRIGHTNESS:
540 val = saa7146_read(dev, BCS_CTRL);
541 val &= 0x00ffffff;
542 val |= (ctrl->val << 24);
543 saa7146_write(dev, BCS_CTRL, val);
544 saa7146_write(dev, MC2, MASK_22 | MASK_06);
545 break;
546
547 case V4L2_CID_CONTRAST:
548 val = saa7146_read(dev, BCS_CTRL);
549 val &= 0xff00ffff;
550 val |= (ctrl->val << 16);
551 saa7146_write(dev, BCS_CTRL, val);
552 saa7146_write(dev, MC2, MASK_22 | MASK_06);
553 break;
554
555 case V4L2_CID_SATURATION:
556 val = saa7146_read(dev, BCS_CTRL);
557 val &= 0xffffff00;
558 val |= (ctrl->val << 0);
559 saa7146_write(dev, BCS_CTRL, val);
560 saa7146_write(dev, MC2, MASK_22 | MASK_06);
561 break;
562
563 case V4L2_CID_HFLIP:
564 /* fixme: we can support changing VFLIP and HFLIP here... */
565 if ((vv->video_status & STATUS_CAPTURE))
566 return -EBUSY;
567 vv->hflip = ctrl->val;
568 break;
569
570 case V4L2_CID_VFLIP:
571 if ((vv->video_status & STATUS_CAPTURE))
572 return -EBUSY;
573 vv->vflip = ctrl->val;
574 break;
575
576 default:
577 return -EINVAL;
578 }
579
580 if ((vv->video_status & STATUS_OVERLAY) != 0) { /* CHECK: && (vv->video_fh == fh)) */
581 struct saa7146_fh *fh = vv->video_fh;
582
583 saa7146_stop_preview(fh);
584 saa7146_start_preview(fh);
585 }
586 return 0;
587 }
588
589 static int vidioc_g_parm(struct file *file, void *fh,
590 struct v4l2_streamparm *parm)
591 {
592 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
593 struct saa7146_vv *vv = dev->vv_data;
594
595 if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
596 return -EINVAL;
597 parm->parm.capture.readbuffers = 1;
598 v4l2_video_std_frame_period(vv->standard->id,
599 &parm->parm.capture.timeperframe);
600 return 0;
601 }
602
603 static int vidioc_g_fmt_vid_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.pix = vv->video_fmt;
609 return 0;
610 }
611
612 static int vidioc_g_fmt_vid_overlay(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
617 f->fmt.win = vv->ov.win;
618 return 0;
619 }
620
621 static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f)
622 {
623 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
624 struct saa7146_vv *vv = dev->vv_data;
625
626 f->fmt.vbi = vv->vbi_fmt;
627 return 0;
628 }
629
630 static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
631 {
632 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
633 struct saa7146_vv *vv = dev->vv_data;
634 struct saa7146_format *fmt;
635 enum v4l2_field field;
636 int maxw, maxh;
637 int calc_bpl;
638
639 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
640
641 fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat);
642 if (NULL == fmt)
643 return -EINVAL;
644
645 field = f->fmt.pix.field;
646 maxw = vv->standard->h_max_out;
647 maxh = vv->standard->v_max_out;
648
649 if (V4L2_FIELD_ANY == field) {
650 field = (f->fmt.pix.height > maxh / 2)
651 ? V4L2_FIELD_INTERLACED
652 : V4L2_FIELD_BOTTOM;
653 }
654 switch (field) {
655 case V4L2_FIELD_ALTERNATE:
656 vv->last_field = V4L2_FIELD_TOP;
657 maxh = maxh / 2;
658 break;
659 case V4L2_FIELD_TOP:
660 case V4L2_FIELD_BOTTOM:
661 vv->last_field = V4L2_FIELD_INTERLACED;
662 maxh = maxh / 2;
663 break;
664 case V4L2_FIELD_INTERLACED:
665 vv->last_field = V4L2_FIELD_INTERLACED;
666 break;
667 default:
668 DEB_D("no known field mode '%d'\n", field);
669 return -EINVAL;
670 }
671
672 f->fmt.pix.field = field;
673 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
674 if (f->fmt.pix.width > maxw)
675 f->fmt.pix.width = maxw;
676 if (f->fmt.pix.height > maxh)
677 f->fmt.pix.height = maxh;
678
679 calc_bpl = (f->fmt.pix.width * fmt->depth) / 8;
680
681 if (f->fmt.pix.bytesperline < calc_bpl)
682 f->fmt.pix.bytesperline = calc_bpl;
683
684 if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */
685 f->fmt.pix.bytesperline = calc_bpl;
686
687 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
688 DEB_D("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n",
689 f->fmt.pix.width, f->fmt.pix.height,
690 f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
691
692 return 0;
693 }
694
695
696 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
697 {
698 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
699 struct saa7146_vv *vv = dev->vv_data;
700 struct v4l2_window *win = &f->fmt.win;
701 enum v4l2_field field;
702 int maxw, maxh;
703
704 DEB_EE("dev:%p\n", dev);
705
706 if (NULL == vv->ov_fb.base) {
707 DEB_D("no fb base set\n");
708 return -EINVAL;
709 }
710 if (NULL == vv->ov_fmt) {
711 DEB_D("no fb fmt set\n");
712 return -EINVAL;
713 }
714 if (win->w.width < 48 || win->w.height < 32) {
715 DEB_D("min width/height. (%d,%d)\n",
716 win->w.width, win->w.height);
717 return -EINVAL;
718 }
719 if (win->clipcount > 16) {
720 DEB_D("clipcount too big\n");
721 return -EINVAL;
722 }
723
724 field = win->field;
725 maxw = vv->standard->h_max_out;
726 maxh = vv->standard->v_max_out;
727
728 if (V4L2_FIELD_ANY == field) {
729 field = (win->w.height > maxh / 2)
730 ? V4L2_FIELD_INTERLACED
731 : V4L2_FIELD_TOP;
732 }
733 switch (field) {
734 case V4L2_FIELD_TOP:
735 case V4L2_FIELD_BOTTOM:
736 case V4L2_FIELD_ALTERNATE:
737 maxh = maxh / 2;
738 break;
739 case V4L2_FIELD_INTERLACED:
740 break;
741 default:
742 DEB_D("no known field mode '%d'\n", field);
743 return -EINVAL;
744 }
745
746 win->field = field;
747 if (win->w.width > maxw)
748 win->w.width = maxw;
749 if (win->w.height > maxh)
750 win->w.height = maxh;
751
752 return 0;
753 }
754
755 static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f)
756 {
757 struct saa7146_fh *fh = __fh;
758 struct saa7146_dev *dev = fh->dev;
759 struct saa7146_vv *vv = dev->vv_data;
760 int err;
761
762 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
763 if (IS_CAPTURE_ACTIVE(fh) != 0) {
764 DEB_EE("streaming capture is active\n");
765 return -EBUSY;
766 }
767 err = vidioc_try_fmt_vid_cap(file, fh, f);
768 if (0 != err)
769 return err;
770 vv->video_fmt = f->fmt.pix;
771 DEB_EE("set to pixelformat '%4.4s'\n",
772 (char *)&vv->video_fmt.pixelformat);
773 return 0;
774 }
775
776 static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f)
777 {
778 struct saa7146_fh *fh = __fh;
779 struct saa7146_dev *dev = fh->dev;
780 struct saa7146_vv *vv = dev->vv_data;
781 int err;
782
783 DEB_EE("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh);
784 err = vidioc_try_fmt_vid_overlay(file, fh, f);
785 if (0 != err)
786 return err;
787 vv->ov.win = f->fmt.win;
788 vv->ov.nclips = f->fmt.win.clipcount;
789 if (vv->ov.nclips > 16)
790 vv->ov.nclips = 16;
791 if (copy_from_user(vv->ov.clips, f->fmt.win.clips,
792 sizeof(struct v4l2_clip) * vv->ov.nclips)) {
793 return -EFAULT;
794 }
795
796 /* vv->ov.fh is used to indicate that we have valid overlay informations, too */
797 vv->ov.fh = fh;
798
799 /* check if our current overlay is active */
800 if (IS_OVERLAY_ACTIVE(fh) != 0) {
801 saa7146_stop_preview(fh);
802 saa7146_start_preview(fh);
803 }
804 return 0;
805 }
806
807 static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm)
808 {
809 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
810 struct saa7146_vv *vv = dev->vv_data;
811
812 *norm = vv->standard->id;
813 return 0;
814 }
815
816 /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
817 PAL / NTSC / SECAM. if your hardware does not (or does more)
818 -- override this function in your extension */
819 /*
820 case VIDIOC_ENUMSTD:
821 {
822 struct v4l2_standard *e = arg;
823 if (e->index < 0 )
824 return -EINVAL;
825 if( e->index < dev->ext_vv_data->num_stds ) {
826 DEB_EE("VIDIOC_ENUMSTD: index:%d\n", e->index);
827 v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
828 return 0;
829 }
830 return -EINVAL;
831 }
832 */
833
834 static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id id)
835 {
836 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
837 struct saa7146_vv *vv = dev->vv_data;
838 int found = 0;
839 int err, i;
840
841 DEB_EE("VIDIOC_S_STD\n");
842
843 if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
844 DEB_D("cannot change video standard while streaming capture is active\n");
845 return -EBUSY;
846 }
847
848 if ((vv->video_status & STATUS_OVERLAY) != 0) {
849 vv->ov_suspend = vv->video_fh;
850 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
851 if (0 != err) {
852 DEB_D("suspending video failed. aborting\n");
853 return err;
854 }
855 }
856
857 for (i = 0; i < dev->ext_vv_data->num_stds; i++)
858 if (id & dev->ext_vv_data->stds[i].id)
859 break;
860 if (i != dev->ext_vv_data->num_stds) {
861 vv->standard = &dev->ext_vv_data->stds[i];
862 if (NULL != dev->ext_vv_data->std_callback)
863 dev->ext_vv_data->std_callback(dev, vv->standard);
864 found = 1;
865 }
866
867 if (vv->ov_suspend != NULL) {
868 saa7146_start_preview(vv->ov_suspend);
869 vv->ov_suspend = NULL;
870 }
871
872 if (!found) {
873 DEB_EE("VIDIOC_S_STD: standard not found\n");
874 return -EINVAL;
875 }
876
877 DEB_EE("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name);
878 return 0;
879 }
880
881 static int vidioc_overlay(struct file *file, void *fh, unsigned int on)
882 {
883 int err;
884
885 DEB_D("VIDIOC_OVERLAY on:%d\n", on);
886 if (on)
887 err = saa7146_start_preview(fh);
888 else
889 err = saa7146_stop_preview(fh);
890 return err;
891 }
892
893 static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b)
894 {
895 struct saa7146_fh *fh = __fh;
896
897 if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
898 return videobuf_reqbufs(&fh->video_q, b);
899 if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE)
900 return videobuf_reqbufs(&fh->vbi_q, b);
901 return -EINVAL;
902 }
903
904 static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
905 {
906 struct saa7146_fh *fh = __fh;
907
908 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
909 return videobuf_querybuf(&fh->video_q, buf);
910 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
911 return videobuf_querybuf(&fh->vbi_q, buf);
912 return -EINVAL;
913 }
914
915 static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
916 {
917 struct saa7146_fh *fh = __fh;
918
919 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
920 return videobuf_qbuf(&fh->video_q, buf);
921 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
922 return videobuf_qbuf(&fh->vbi_q, buf);
923 return -EINVAL;
924 }
925
926 static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
927 {
928 struct saa7146_fh *fh = __fh;
929
930 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
931 return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK);
932 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
933 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK);
934 return -EINVAL;
935 }
936
937 static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
938 {
939 struct saa7146_fh *fh = __fh;
940 int err;
941
942 DEB_D("VIDIOC_STREAMON, type:%d\n", type);
943
944 err = video_begin(fh);
945 if (err)
946 return err;
947 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
948 return videobuf_streamon(&fh->video_q);
949 if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
950 return videobuf_streamon(&fh->vbi_q);
951 return -EINVAL;
952 }
953
954 static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
955 {
956 struct saa7146_fh *fh = __fh;
957 struct saa7146_dev *dev = fh->dev;
958 struct saa7146_vv *vv = dev->vv_data;
959 int err;
960
961 DEB_D("VIDIOC_STREAMOFF, type:%d\n", type);
962
963 /* ugly: we need to copy some checks from video_end(),
964 because videobuf_streamoff() relies on the capture running.
965 check and fix this */
966 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
967 DEB_S("not capturing\n");
968 return 0;
969 }
970
971 if (vv->video_fh != fh) {
972 DEB_S("capturing, but in another open\n");
973 return -EBUSY;
974 }
975
976 err = -EINVAL;
977 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
978 err = videobuf_streamoff(&fh->video_q);
979 else if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
980 err = videobuf_streamoff(&fh->vbi_q);
981 if (0 != err) {
982 DEB_D("warning: videobuf_streamoff() failed\n");
983 video_end(fh, file);
984 } else {
985 err = video_end(fh, file);
986 }
987 return err;
988 }
989
990 const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
991 .vidioc_querycap = vidioc_querycap,
992 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
993 .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap,
994 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
995 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
996 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
997 .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_vid_overlay,
998 .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_vid_overlay,
999 .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_vid_overlay,
1000
1001 .vidioc_overlay = vidioc_overlay,
1002 .vidioc_g_fbuf = vidioc_g_fbuf,
1003 .vidioc_s_fbuf = vidioc_s_fbuf,
1004 .vidioc_reqbufs = vidioc_reqbufs,
1005 .vidioc_querybuf = vidioc_querybuf,
1006 .vidioc_qbuf = vidioc_qbuf,
1007 .vidioc_dqbuf = vidioc_dqbuf,
1008 .vidioc_g_std = vidioc_g_std,
1009 .vidioc_s_std = vidioc_s_std,
1010 .vidioc_streamon = vidioc_streamon,
1011 .vidioc_streamoff = vidioc_streamoff,
1012 .vidioc_g_parm = vidioc_g_parm,
1013 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1014 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1015 };
1016
1017 const struct v4l2_ioctl_ops saa7146_vbi_ioctl_ops = {
1018 .vidioc_querycap = vidioc_querycap,
1019 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
1020
1021 .vidioc_reqbufs = vidioc_reqbufs,
1022 .vidioc_querybuf = vidioc_querybuf,
1023 .vidioc_qbuf = vidioc_qbuf,
1024 .vidioc_dqbuf = vidioc_dqbuf,
1025 .vidioc_g_std = vidioc_g_std,
1026 .vidioc_s_std = vidioc_s_std,
1027 .vidioc_streamon = vidioc_streamon,
1028 .vidioc_streamoff = vidioc_streamoff,
1029 .vidioc_g_parm = vidioc_g_parm,
1030 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1031 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1032 };
1033
1034 /*********************************************************************************/
1035 /* buffer handling functions */
1036
1037 static int buffer_activate (struct saa7146_dev *dev,
1038 struct saa7146_buf *buf,
1039 struct saa7146_buf *next)
1040 {
1041 struct saa7146_vv *vv = dev->vv_data;
1042
1043 buf->vb.state = VIDEOBUF_ACTIVE;
1044 saa7146_set_capture(dev,buf,next);
1045
1046 mod_timer(&vv->video_dmaq.timeout, jiffies+BUFFER_TIMEOUT);
1047 return 0;
1048 }
1049
1050 static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf)
1051 {
1052 saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1053 saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1054 saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1055 }
1056
1057 static int buffer_prepare(struct videobuf_queue *q,
1058 struct videobuf_buffer *vb, enum v4l2_field field)
1059 {
1060 struct file *file = q->priv_data;
1061 struct saa7146_fh *fh = file->private_data;
1062 struct saa7146_dev *dev = fh->dev;
1063 struct saa7146_vv *vv = dev->vv_data;
1064 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1065 int size,err = 0;
1066
1067 DEB_CAP("vbuf:%p\n", vb);
1068
1069 /* sanity checks */
1070 if (vv->video_fmt.width < 48 ||
1071 vv->video_fmt.height < 32 ||
1072 vv->video_fmt.width > vv->standard->h_max_out ||
1073 vv->video_fmt.height > vv->standard->v_max_out) {
1074 DEB_D("w (%d) / h (%d) out of bounds\n",
1075 vv->video_fmt.width, vv->video_fmt.height);
1076 return -EINVAL;
1077 }
1078
1079 size = vv->video_fmt.sizeimage;
1080 if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1081 DEB_D("size mismatch\n");
1082 return -EINVAL;
1083 }
1084
1085 DEB_CAP("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1086 vv->video_fmt.width, vv->video_fmt.height,
1087 size, v4l2_field_names[vv->video_fmt.field]);
1088 if (buf->vb.width != vv->video_fmt.width ||
1089 buf->vb.bytesperline != vv->video_fmt.bytesperline ||
1090 buf->vb.height != vv->video_fmt.height ||
1091 buf->vb.size != size ||
1092 buf->vb.field != field ||
1093 buf->vb.field != vv->video_fmt.field ||
1094 buf->fmt != &vv->video_fmt) {
1095 saa7146_dma_free(dev,q,buf);
1096 }
1097
1098 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1099 struct saa7146_format *sfmt;
1100
1101 buf->vb.bytesperline = vv->video_fmt.bytesperline;
1102 buf->vb.width = vv->video_fmt.width;
1103 buf->vb.height = vv->video_fmt.height;
1104 buf->vb.size = size;
1105 buf->vb.field = field;
1106 buf->fmt = &vv->video_fmt;
1107 buf->vb.field = vv->video_fmt.field;
1108
1109 sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
1110
1111 release_all_pagetables(dev, buf);
1112 if( 0 != IS_PLANAR(sfmt->trans)) {
1113 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1114 saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1115 saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1116 } else {
1117 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1118 }
1119
1120 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1121 if (err)
1122 goto oops;
1123 err = saa7146_pgtable_build(dev,buf);
1124 if (err)
1125 goto oops;
1126 }
1127 buf->vb.state = VIDEOBUF_PREPARED;
1128 buf->activate = buffer_activate;
1129
1130 return 0;
1131
1132 oops:
1133 DEB_D("error out\n");
1134 saa7146_dma_free(dev,q,buf);
1135
1136 return err;
1137 }
1138
1139 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1140 {
1141 struct file *file = q->priv_data;
1142 struct saa7146_fh *fh = file->private_data;
1143 struct saa7146_vv *vv = fh->dev->vv_data;
1144
1145 if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1146 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1147
1148 *size = vv->video_fmt.sizeimage;
1149
1150 /* check if we exceed the "max_memory" parameter */
1151 if( (*count * *size) > (max_memory*1048576) ) {
1152 *count = (max_memory*1048576) / *size;
1153 }
1154
1155 DEB_CAP("%d buffers, %d bytes each\n", *count, *size);
1156
1157 return 0;
1158 }
1159
1160 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1161 {
1162 struct file *file = q->priv_data;
1163 struct saa7146_fh *fh = file->private_data;
1164 struct saa7146_dev *dev = fh->dev;
1165 struct saa7146_vv *vv = dev->vv_data;
1166 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1167
1168 DEB_CAP("vbuf:%p\n", vb);
1169 saa7146_buffer_queue(fh->dev, &vv->video_dmaq, buf);
1170 }
1171
1172 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1173 {
1174 struct file *file = q->priv_data;
1175 struct saa7146_fh *fh = file->private_data;
1176 struct saa7146_dev *dev = fh->dev;
1177 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1178
1179 DEB_CAP("vbuf:%p\n", vb);
1180
1181 saa7146_dma_free(dev,q,buf);
1182
1183 release_all_pagetables(dev, buf);
1184 }
1185
1186 static struct videobuf_queue_ops video_qops = {
1187 .buf_setup = buffer_setup,
1188 .buf_prepare = buffer_prepare,
1189 .buf_queue = buffer_queue,
1190 .buf_release = buffer_release,
1191 };
1192
1193 /********************************************************************************/
1194 /* file operations */
1195
1196 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1197 {
1198 INIT_LIST_HEAD(&vv->video_dmaq.queue);
1199
1200 init_timer(&vv->video_dmaq.timeout);
1201 vv->video_dmaq.timeout.function = saa7146_buffer_timeout;
1202 vv->video_dmaq.timeout.data = (unsigned long)(&vv->video_dmaq);
1203 vv->video_dmaq.dev = dev;
1204
1205 /* set some default values */
1206 vv->standard = &dev->ext_vv_data->stds[0];
1207
1208 /* FIXME: what's this? */
1209 vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1210 vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1211 }
1212
1213
1214 static int video_open(struct saa7146_dev *dev, struct file *file)
1215 {
1216 struct saa7146_fh *fh = file->private_data;
1217
1218 videobuf_queue_sg_init(&fh->video_q, &video_qops,
1219 &dev->pci->dev, &dev->slock,
1220 V4L2_BUF_TYPE_VIDEO_CAPTURE,
1221 V4L2_FIELD_INTERLACED,
1222 sizeof(struct saa7146_buf),
1223 file, &dev->v4l2_lock);
1224
1225 return 0;
1226 }
1227
1228
1229 static void video_close(struct saa7146_dev *dev, struct file *file)
1230 {
1231 struct saa7146_fh *fh = file->private_data;
1232 struct saa7146_vv *vv = dev->vv_data;
1233 struct videobuf_queue *q = &fh->video_q;
1234
1235 if (IS_CAPTURE_ACTIVE(fh) != 0)
1236 video_end(fh, file);
1237 else if (IS_OVERLAY_ACTIVE(fh) != 0)
1238 saa7146_stop_preview(fh);
1239
1240 videobuf_stop(q);
1241 /* hmm, why is this function declared void? */
1242 }
1243
1244
1245 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1246 {
1247 struct saa7146_vv *vv = dev->vv_data;
1248 struct saa7146_dmaqueue *q = &vv->video_dmaq;
1249
1250 spin_lock(&dev->slock);
1251 DEB_CAP("called\n");
1252
1253 /* only finish the buffer if we have one... */
1254 if( NULL != q->curr ) {
1255 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1256 }
1257 saa7146_buffer_next(dev,q,0);
1258
1259 spin_unlock(&dev->slock);
1260 }
1261
1262 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1263 {
1264 struct saa7146_fh *fh = file->private_data;
1265 struct saa7146_dev *dev = fh->dev;
1266 struct saa7146_vv *vv = dev->vv_data;
1267 ssize_t ret = 0;
1268
1269 DEB_EE("called\n");
1270
1271 if ((vv->video_status & STATUS_CAPTURE) != 0) {
1272 /* fixme: should we allow read() captures while streaming capture? */
1273 if (vv->video_fh == fh) {
1274 DEB_S("already capturing\n");
1275 return -EBUSY;
1276 }
1277 DEB_S("already capturing in another open\n");
1278 return -EBUSY;
1279 }
1280
1281 ret = video_begin(fh);
1282 if( 0 != ret) {
1283 goto out;
1284 }
1285
1286 ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1287 file->f_flags & O_NONBLOCK);
1288 if (ret != 0) {
1289 video_end(fh, file);
1290 } else {
1291 ret = video_end(fh, file);
1292 }
1293 out:
1294 /* restart overlay if it was active before */
1295 if (vv->ov_suspend != NULL) {
1296 saa7146_start_preview(vv->ov_suspend);
1297 vv->ov_suspend = NULL;
1298 }
1299
1300 return ret;
1301 }
1302
1303 struct saa7146_use_ops saa7146_video_uops = {
1304 .init = video_init,
1305 .open = video_open,
1306 .release = video_close,
1307 .irq_done = video_irq_done,
1308 .read = video_read,
1309 };
Linux kernel - Deliverables
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