?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
WIP FPC-III support
[linux/fpc-iii.git] / drivers / media / common / saa7146 / saa7146_video.c
blob7b8795eca5893c76012b4bac6c7aa6c08c735524
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 < list->length; p++, ptr1++) {
251 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
252 }
253 }
254 /*
255 ptr1 = pt1->cpu;
256 for(j=0;j<40;j++) {
257 printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
258 }
259 */
260
261 /* if we have a user buffer, the first page may not be
262 aligned to a page boundary. */
263 pt1->offset = dma->sglist->offset;
264 pt2->offset = pt1->offset+o1;
265 pt3->offset = pt1->offset+o2;
266
267 /* create video-dma2 page table */
268 ptr1 = pt1->cpu;
269 for(i = m1; i <= m2 ; i++, ptr2++) {
270 *ptr2 = ptr1[i];
271 }
272 fill = *(ptr2-1);
273 for(;i<1024;i++,ptr2++) {
274 *ptr2 = fill;
275 }
276 /* create video-dma3 page table */
277 ptr1 = pt1->cpu;
278 for(i = m2; i <= m3; i++,ptr3++) {
279 *ptr3 = ptr1[i];
280 }
281 fill = *(ptr3-1);
282 for(;i<1024;i++,ptr3++) {
283 *ptr3 = fill;
284 }
285 /* finally: finish up video-dma1 page table */
286 ptr1 = pt1->cpu+m1;
287 fill = pt1->cpu[m1];
288 for(i=m1;i<1024;i++,ptr1++) {
289 *ptr1 = fill;
290 }
291 /*
292 ptr1 = pt1->cpu;
293 ptr2 = pt2->cpu;
294 ptr3 = pt3->cpu;
295 for(j=0;j<40;j++) {
296 printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
297 }
298 for(j=0;j<40;j++) {
299 printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
300 }
301 for(j=0;j<40;j++) {
302 printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
303 }
304 */
305 } else {
306 struct saa7146_pgtable *pt = &buf->pt[0];
307 return saa7146_pgtable_build_single(pci, pt, list, length);
308 }
309
310 return 0;
311 }
312
313
314 /********************************************************************************/
315 /* file operations */
316
317 static int video_begin(struct saa7146_fh *fh)
318 {
319 struct saa7146_dev *dev = fh->dev;
320 struct saa7146_vv *vv = dev->vv_data;
321 struct saa7146_format *fmt = NULL;
322 unsigned int resource;
323 int ret = 0, err = 0;
324
325 DEB_EE("dev:%p, fh:%p\n", dev, fh);
326
327 if ((vv->video_status & STATUS_CAPTURE) != 0) {
328 if (vv->video_fh == fh) {
329 DEB_S("already capturing\n");
330 return 0;
331 }
332 DEB_S("already capturing in another open\n");
333 return -EBUSY;
334 }
335
336 if ((vv->video_status & STATUS_OVERLAY) != 0) {
337 DEB_S("warning: suspending overlay video for streaming capture\n");
338 vv->ov_suspend = vv->video_fh;
339 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
340 if (0 != err) {
341 DEB_D("suspending video failed. aborting\n");
342 return err;
343 }
344 }
345
346 fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat);
347 /* we need to have a valid format set here */
348 if (!fmt)
349 return -EINVAL;
350
351 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
352 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
353 } else {
354 resource = RESOURCE_DMA1_HPS;
355 }
356
357 ret = saa7146_res_get(fh, resource);
358 if (0 == ret) {
359 DEB_S("cannot get capture resource %d\n", resource);
360 if (vv->ov_suspend != NULL) {
361 saa7146_start_preview(vv->ov_suspend);
362 vv->ov_suspend = NULL;
363 }
364 return -EBUSY;
365 }
366
367 /* clear out beginning of streaming bit (rps register 0)*/
368 saa7146_write(dev, MC2, MASK_27 );
369
370 /* enable rps0 irqs */
371 SAA7146_IER_ENABLE(dev, MASK_27);
372
373 vv->video_fh = fh;
374 vv->video_status = STATUS_CAPTURE;
375
376 return 0;
377 }
378
379 static int video_end(struct saa7146_fh *fh, struct file *file)
380 {
381 struct saa7146_dev *dev = fh->dev;
382 struct saa7146_vv *vv = dev->vv_data;
383 struct saa7146_dmaqueue *q = &vv->video_dmaq;
384 struct saa7146_format *fmt = NULL;
385 unsigned long flags;
386 unsigned int resource;
387 u32 dmas = 0;
388 DEB_EE("dev:%p, fh:%p\n", dev, fh);
389
390 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
391 DEB_S("not capturing\n");
392 return 0;
393 }
394
395 if (vv->video_fh != fh) {
396 DEB_S("capturing, but in another open\n");
397 return -EBUSY;
398 }
399
400 fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat);
401 /* we need to have a valid format set here */
402 if (!fmt)
403 return -EINVAL;
404
405 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
406 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
407 dmas = MASK_22 | MASK_21 | MASK_20;
408 } else {
409 resource = RESOURCE_DMA1_HPS;
410 dmas = MASK_22;
411 }
412 spin_lock_irqsave(&dev->slock,flags);
413
414 /* disable rps0 */
415 saa7146_write(dev, MC1, MASK_28);
416
417 /* disable rps0 irqs */
418 SAA7146_IER_DISABLE(dev, MASK_27);
419
420 /* shut down all used video dma transfers */
421 saa7146_write(dev, MC1, dmas);
422
423 if (q->curr)
424 saa7146_buffer_finish(dev, q, VIDEOBUF_DONE);
425
426 spin_unlock_irqrestore(&dev->slock, flags);
427
428 vv->video_fh = NULL;
429 vv->video_status = 0;
430
431 saa7146_res_free(fh, resource);
432
433 if (vv->ov_suspend != NULL) {
434 saa7146_start_preview(vv->ov_suspend);
435 vv->ov_suspend = NULL;
436 }
437
438 return 0;
439 }
440
441 static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
442 {
443 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
444
445 strscpy((char *)cap->driver, "saa7146 v4l2", sizeof(cap->driver));
446 strscpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
447 sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci));
448 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY |
449 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
450 V4L2_CAP_DEVICE_CAPS;
451 cap->capabilities |= dev->ext_vv_data->capabilities;
452 return 0;
453 }
454
455 static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
456 {
457 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
458 struct saa7146_vv *vv = dev->vv_data;
459
460 *fb = vv->ov_fb;
461 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
462 fb->flags = V4L2_FBUF_FLAG_PRIMARY;
463 return 0;
464 }
465
466 static int vidioc_s_fbuf(struct file *file, void *fh, const struct v4l2_framebuffer *fb)
467 {
468 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
469 struct saa7146_vv *vv = dev->vv_data;
470 struct saa7146_format *fmt;
471
472 DEB_EE("VIDIOC_S_FBUF\n");
473
474 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
475 return -EPERM;
476
477 /* check args */
478 fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat);
479 if (NULL == fmt)
480 return -EINVAL;
481
482 /* planar formats are not allowed for overlay video, clipping and video dma would clash */
483 if (fmt->flags & FORMAT_IS_PLANAR)
484 DEB_S("planar pixelformat '%4.4s' not allowed for overlay\n",
485 (char *)&fmt->pixelformat);
486
487 /* check if overlay is running */
488 if (IS_OVERLAY_ACTIVE(fh) != 0) {
489 if (vv->video_fh != fh) {
490 DEB_D("refusing to change framebuffer information while overlay is active in another open\n");
491 return -EBUSY;
492 }
493 }
494
495 /* ok, accept it */
496 vv->ov_fb = *fb;
497 vv->ov_fmt = fmt;
498
499 if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) {
500 vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8;
501 DEB_D("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline);
502 }
503 return 0;
504 }
505
506 static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
507 {
508 if (f->index >= ARRAY_SIZE(formats))
509 return -EINVAL;
510 f->pixelformat = formats[f->index].pixelformat;
511 return 0;
512 }
513
514 int saa7146_s_ctrl(struct v4l2_ctrl *ctrl)
515 {
516 struct saa7146_dev *dev = container_of(ctrl->handler,
517 struct saa7146_dev, ctrl_handler);
518 struct saa7146_vv *vv = dev->vv_data;
519 u32 val;
520
521 switch (ctrl->id) {
522 case V4L2_CID_BRIGHTNESS:
523 val = saa7146_read(dev, BCS_CTRL);
524 val &= 0x00ffffff;
525 val |= (ctrl->val << 24);
526 saa7146_write(dev, BCS_CTRL, val);
527 saa7146_write(dev, MC2, MASK_22 | MASK_06);
528 break;
529
530 case V4L2_CID_CONTRAST:
531 val = saa7146_read(dev, BCS_CTRL);
532 val &= 0xff00ffff;
533 val |= (ctrl->val << 16);
534 saa7146_write(dev, BCS_CTRL, val);
535 saa7146_write(dev, MC2, MASK_22 | MASK_06);
536 break;
537
538 case V4L2_CID_SATURATION:
539 val = saa7146_read(dev, BCS_CTRL);
540 val &= 0xffffff00;
541 val |= (ctrl->val << 0);
542 saa7146_write(dev, BCS_CTRL, val);
543 saa7146_write(dev, MC2, MASK_22 | MASK_06);
544 break;
545
546 case V4L2_CID_HFLIP:
547 /* fixme: we can support changing VFLIP and HFLIP here... */
548 if ((vv->video_status & STATUS_CAPTURE))
549 return -EBUSY;
550 vv->hflip = ctrl->val;
551 break;
552
553 case V4L2_CID_VFLIP:
554 if ((vv->video_status & STATUS_CAPTURE))
555 return -EBUSY;
556 vv->vflip = ctrl->val;
557 break;
558
559 default:
560 return -EINVAL;
561 }
562
563 if ((vv->video_status & STATUS_OVERLAY) != 0) { /* CHECK: && (vv->video_fh == fh)) */
564 struct saa7146_fh *fh = vv->video_fh;
565
566 saa7146_stop_preview(fh);
567 saa7146_start_preview(fh);
568 }
569 return 0;
570 }
571
572 static int vidioc_g_parm(struct file *file, void *fh,
573 struct v4l2_streamparm *parm)
574 {
575 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
576 struct saa7146_vv *vv = dev->vv_data;
577
578 if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
579 return -EINVAL;
580 parm->parm.capture.readbuffers = 1;
581 v4l2_video_std_frame_period(vv->standard->id,
582 &parm->parm.capture.timeperframe);
583 return 0;
584 }
585
586 static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
587 {
588 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
589 struct saa7146_vv *vv = dev->vv_data;
590
591 f->fmt.pix = vv->video_fmt;
592 return 0;
593 }
594
595 static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
596 {
597 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
598 struct saa7146_vv *vv = dev->vv_data;
599
600 f->fmt.win = vv->ov.win;
601 return 0;
602 }
603
604 static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f)
605 {
606 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
607 struct saa7146_vv *vv = dev->vv_data;
608
609 f->fmt.vbi = vv->vbi_fmt;
610 return 0;
611 }
612
613 static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
614 {
615 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
616 struct saa7146_vv *vv = dev->vv_data;
617 struct saa7146_format *fmt;
618 enum v4l2_field field;
619 int maxw, maxh;
620 int calc_bpl;
621
622 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
623
624 fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat);
625 if (NULL == fmt)
626 return -EINVAL;
627
628 field = f->fmt.pix.field;
629 maxw = vv->standard->h_max_out;
630 maxh = vv->standard->v_max_out;
631
632 if (V4L2_FIELD_ANY == field) {
633 field = (f->fmt.pix.height > maxh / 2)
634 ? V4L2_FIELD_INTERLACED
635 : V4L2_FIELD_BOTTOM;
636 }
637 switch (field) {
638 case V4L2_FIELD_ALTERNATE:
639 vv->last_field = V4L2_FIELD_TOP;
640 maxh = maxh / 2;
641 break;
642 case V4L2_FIELD_TOP:
643 case V4L2_FIELD_BOTTOM:
644 vv->last_field = V4L2_FIELD_INTERLACED;
645 maxh = maxh / 2;
646 break;
647 case V4L2_FIELD_INTERLACED:
648 vv->last_field = V4L2_FIELD_INTERLACED;
649 break;
650 default:
651 DEB_D("no known field mode '%d'\n", field);
652 return -EINVAL;
653 }
654
655 f->fmt.pix.field = field;
656 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
657 if (f->fmt.pix.width > maxw)
658 f->fmt.pix.width = maxw;
659 if (f->fmt.pix.height > maxh)
660 f->fmt.pix.height = maxh;
661
662 calc_bpl = (f->fmt.pix.width * fmt->depth) / 8;
663
664 if (f->fmt.pix.bytesperline < calc_bpl)
665 f->fmt.pix.bytesperline = calc_bpl;
666
667 if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */
668 f->fmt.pix.bytesperline = calc_bpl;
669
670 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
671 DEB_D("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n",
672 f->fmt.pix.width, f->fmt.pix.height,
673 f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
674
675 return 0;
676 }
677
678
679 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
680 {
681 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
682 struct saa7146_vv *vv = dev->vv_data;
683 struct v4l2_window *win = &f->fmt.win;
684 enum v4l2_field field;
685 int maxw, maxh;
686
687 DEB_EE("dev:%p\n", dev);
688
689 if (NULL == vv->ov_fb.base) {
690 DEB_D("no fb base set\n");
691 return -EINVAL;
692 }
693 if (NULL == vv->ov_fmt) {
694 DEB_D("no fb fmt set\n");
695 return -EINVAL;
696 }
697 if (win->w.width < 48 || win->w.height < 32) {
698 DEB_D("min width/height. (%d,%d)\n",
699 win->w.width, win->w.height);
700 return -EINVAL;
701 }
702 if (win->clipcount > 16) {
703 DEB_D("clipcount too big\n");
704 return -EINVAL;
705 }
706
707 field = win->field;
708 maxw = vv->standard->h_max_out;
709 maxh = vv->standard->v_max_out;
710
711 if (V4L2_FIELD_ANY == field) {
712 field = (win->w.height > maxh / 2)
713 ? V4L2_FIELD_INTERLACED
714 : V4L2_FIELD_TOP;
715 }
716 switch (field) {
717 case V4L2_FIELD_TOP:
718 case V4L2_FIELD_BOTTOM:
719 case V4L2_FIELD_ALTERNATE:
720 maxh = maxh / 2;
721 break;
722 case V4L2_FIELD_INTERLACED:
723 break;
724 default:
725 DEB_D("no known field mode '%d'\n", field);
726 return -EINVAL;
727 }
728
729 win->field = field;
730 if (win->w.width > maxw)
731 win->w.width = maxw;
732 if (win->w.height > maxh)
733 win->w.height = maxh;
734
735 return 0;
736 }
737
738 static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f)
739 {
740 struct saa7146_fh *fh = __fh;
741 struct saa7146_dev *dev = fh->dev;
742 struct saa7146_vv *vv = dev->vv_data;
743 int err;
744
745 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
746 if (IS_CAPTURE_ACTIVE(fh) != 0) {
747 DEB_EE("streaming capture is active\n");
748 return -EBUSY;
749 }
750 err = vidioc_try_fmt_vid_cap(file, fh, f);
751 if (0 != err)
752 return err;
753 vv->video_fmt = f->fmt.pix;
754 DEB_EE("set to pixelformat '%4.4s'\n",
755 (char *)&vv->video_fmt.pixelformat);
756 return 0;
757 }
758
759 static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f)
760 {
761 struct saa7146_fh *fh = __fh;
762 struct saa7146_dev *dev = fh->dev;
763 struct saa7146_vv *vv = dev->vv_data;
764 int err;
765
766 DEB_EE("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh);
767 err = vidioc_try_fmt_vid_overlay(file, fh, f);
768 if (0 != err)
769 return err;
770 vv->ov.win = f->fmt.win;
771 vv->ov.nclips = f->fmt.win.clipcount;
772 if (vv->ov.nclips > 16)
773 vv->ov.nclips = 16;
774 memcpy(vv->ov.clips, f->fmt.win.clips,
775 sizeof(struct v4l2_clip) * vv->ov.nclips);
776
777 /* vv->ov.fh is used to indicate that we have valid overlay information, too */
778 vv->ov.fh = fh;
779
780 /* check if our current overlay is active */
781 if (IS_OVERLAY_ACTIVE(fh) != 0) {
782 saa7146_stop_preview(fh);
783 saa7146_start_preview(fh);
784 }
785 return 0;
786 }
787
788 static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm)
789 {
790 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
791 struct saa7146_vv *vv = dev->vv_data;
792
793 *norm = vv->standard->id;
794 return 0;
795 }
796
797 /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
798 PAL / NTSC / SECAM. if your hardware does not (or does more)
799 -- override this function in your extension */
800 /*
801 case VIDIOC_ENUMSTD:
802 {
803 struct v4l2_standard *e = arg;
804 if (e->index < 0 )
805 return -EINVAL;
806 if( e->index < dev->ext_vv_data->num_stds ) {
807 DEB_EE("VIDIOC_ENUMSTD: index:%d\n", e->index);
808 v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
809 return 0;
810 }
811 return -EINVAL;
812 }
813 */
814
815 static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id id)
816 {
817 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
818 struct saa7146_vv *vv = dev->vv_data;
819 int found = 0;
820 int err, i;
821
822 DEB_EE("VIDIOC_S_STD\n");
823
824 if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
825 DEB_D("cannot change video standard while streaming capture is active\n");
826 return -EBUSY;
827 }
828
829 if ((vv->video_status & STATUS_OVERLAY) != 0) {
830 vv->ov_suspend = vv->video_fh;
831 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
832 if (0 != err) {
833 DEB_D("suspending video failed. aborting\n");
834 return err;
835 }
836 }
837
838 for (i = 0; i < dev->ext_vv_data->num_stds; i++)
839 if (id & dev->ext_vv_data->stds[i].id)
840 break;
841 if (i != dev->ext_vv_data->num_stds) {
842 vv->standard = &dev->ext_vv_data->stds[i];
843 if (NULL != dev->ext_vv_data->std_callback)
844 dev->ext_vv_data->std_callback(dev, vv->standard);
845 found = 1;
846 }
847
848 if (vv->ov_suspend != NULL) {
849 saa7146_start_preview(vv->ov_suspend);
850 vv->ov_suspend = NULL;
851 }
852
853 if (!found) {
854 DEB_EE("VIDIOC_S_STD: standard not found\n");
855 return -EINVAL;
856 }
857
858 DEB_EE("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name);
859 return 0;
860 }
861
862 static int vidioc_overlay(struct file *file, void *fh, unsigned int on)
863 {
864 int err;
865
866 DEB_D("VIDIOC_OVERLAY on:%d\n", on);
867 if (on)
868 err = saa7146_start_preview(fh);
869 else
870 err = saa7146_stop_preview(fh);
871 return err;
872 }
873
874 static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b)
875 {
876 struct saa7146_fh *fh = __fh;
877
878 if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
879 return videobuf_reqbufs(&fh->video_q, b);
880 if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE)
881 return videobuf_reqbufs(&fh->vbi_q, b);
882 return -EINVAL;
883 }
884
885 static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
886 {
887 struct saa7146_fh *fh = __fh;
888
889 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
890 return videobuf_querybuf(&fh->video_q, buf);
891 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
892 return videobuf_querybuf(&fh->vbi_q, buf);
893 return -EINVAL;
894 }
895
896 static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
897 {
898 struct saa7146_fh *fh = __fh;
899
900 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
901 return videobuf_qbuf(&fh->video_q, buf);
902 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
903 return videobuf_qbuf(&fh->vbi_q, buf);
904 return -EINVAL;
905 }
906
907 static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
908 {
909 struct saa7146_fh *fh = __fh;
910
911 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
912 return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK);
913 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
914 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK);
915 return -EINVAL;
916 }
917
918 static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
919 {
920 struct saa7146_fh *fh = __fh;
921 int err;
922
923 DEB_D("VIDIOC_STREAMON, type:%d\n", type);
924
925 err = video_begin(fh);
926 if (err)
927 return err;
928 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
929 return videobuf_streamon(&fh->video_q);
930 if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
931 return videobuf_streamon(&fh->vbi_q);
932 return -EINVAL;
933 }
934
935 static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
936 {
937 struct saa7146_fh *fh = __fh;
938 struct saa7146_dev *dev = fh->dev;
939 struct saa7146_vv *vv = dev->vv_data;
940 int err;
941
942 DEB_D("VIDIOC_STREAMOFF, type:%d\n", type);
943
944 /* ugly: we need to copy some checks from video_end(),
945 because videobuf_streamoff() relies on the capture running.
946 check and fix this */
947 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
948 DEB_S("not capturing\n");
949 return 0;
950 }
951
952 if (vv->video_fh != fh) {
953 DEB_S("capturing, but in another open\n");
954 return -EBUSY;
955 }
956
957 err = -EINVAL;
958 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
959 err = videobuf_streamoff(&fh->video_q);
960 else if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
961 err = videobuf_streamoff(&fh->vbi_q);
962 if (0 != err) {
963 DEB_D("warning: videobuf_streamoff() failed\n");
964 video_end(fh, file);
965 } else {
966 err = video_end(fh, file);
967 }
968 return err;
969 }
970
971 const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
972 .vidioc_querycap = vidioc_querycap,
973 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
974 .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap,
975 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
976 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
977 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
978 .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_vid_overlay,
979 .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_vid_overlay,
980 .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_vid_overlay,
981
982 .vidioc_overlay = vidioc_overlay,
983 .vidioc_g_fbuf = vidioc_g_fbuf,
984 .vidioc_s_fbuf = vidioc_s_fbuf,
985 .vidioc_reqbufs = vidioc_reqbufs,
986 .vidioc_querybuf = vidioc_querybuf,
987 .vidioc_qbuf = vidioc_qbuf,
988 .vidioc_dqbuf = vidioc_dqbuf,
989 .vidioc_g_std = vidioc_g_std,
990 .vidioc_s_std = vidioc_s_std,
991 .vidioc_streamon = vidioc_streamon,
992 .vidioc_streamoff = vidioc_streamoff,
993 .vidioc_g_parm = vidioc_g_parm,
994 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
995 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
996 };
997
998 const struct v4l2_ioctl_ops saa7146_vbi_ioctl_ops = {
999 .vidioc_querycap = vidioc_querycap,
1000 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
1001
1002 .vidioc_reqbufs = vidioc_reqbufs,
1003 .vidioc_querybuf = vidioc_querybuf,
1004 .vidioc_qbuf = vidioc_qbuf,
1005 .vidioc_dqbuf = vidioc_dqbuf,
1006 .vidioc_g_std = vidioc_g_std,
1007 .vidioc_s_std = vidioc_s_std,
1008 .vidioc_streamon = vidioc_streamon,
1009 .vidioc_streamoff = vidioc_streamoff,
1010 .vidioc_g_parm = vidioc_g_parm,
1011 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1012 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1013 };
1014
1015 /*********************************************************************************/
1016 /* buffer handling functions */
1017
1018 static int buffer_activate (struct saa7146_dev *dev,
1019 struct saa7146_buf *buf,
1020 struct saa7146_buf *next)
1021 {
1022 struct saa7146_vv *vv = dev->vv_data;
1023
1024 buf->vb.state = VIDEOBUF_ACTIVE;
1025 saa7146_set_capture(dev,buf,next);
1026
1027 mod_timer(&vv->video_dmaq.timeout, jiffies+BUFFER_TIMEOUT);
1028 return 0;
1029 }
1030
1031 static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf)
1032 {
1033 saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1034 saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1035 saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1036 }
1037
1038 static int buffer_prepare(struct videobuf_queue *q,
1039 struct videobuf_buffer *vb, enum v4l2_field field)
1040 {
1041 struct file *file = q->priv_data;
1042 struct saa7146_fh *fh = file->private_data;
1043 struct saa7146_dev *dev = fh->dev;
1044 struct saa7146_vv *vv = dev->vv_data;
1045 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1046 int size,err = 0;
1047
1048 DEB_CAP("vbuf:%p\n", vb);
1049
1050 /* sanity checks */
1051 if (vv->video_fmt.width < 48 ||
1052 vv->video_fmt.height < 32 ||
1053 vv->video_fmt.width > vv->standard->h_max_out ||
1054 vv->video_fmt.height > vv->standard->v_max_out) {
1055 DEB_D("w (%d) / h (%d) out of bounds\n",
1056 vv->video_fmt.width, vv->video_fmt.height);
1057 return -EINVAL;
1058 }
1059
1060 size = vv->video_fmt.sizeimage;
1061 if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1062 DEB_D("size mismatch\n");
1063 return -EINVAL;
1064 }
1065
1066 DEB_CAP("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1067 vv->video_fmt.width, vv->video_fmt.height,
1068 size, v4l2_field_names[vv->video_fmt.field]);
1069 if (buf->vb.width != vv->video_fmt.width ||
1070 buf->vb.bytesperline != vv->video_fmt.bytesperline ||
1071 buf->vb.height != vv->video_fmt.height ||
1072 buf->vb.size != size ||
1073 buf->vb.field != field ||
1074 buf->vb.field != vv->video_fmt.field ||
1075 buf->fmt != &vv->video_fmt) {
1076 saa7146_dma_free(dev,q,buf);
1077 }
1078
1079 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1080 struct saa7146_format *sfmt;
1081
1082 buf->vb.bytesperline = vv->video_fmt.bytesperline;
1083 buf->vb.width = vv->video_fmt.width;
1084 buf->vb.height = vv->video_fmt.height;
1085 buf->vb.size = size;
1086 buf->vb.field = field;
1087 buf->fmt = &vv->video_fmt;
1088 buf->vb.field = vv->video_fmt.field;
1089
1090 sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
1091
1092 release_all_pagetables(dev, buf);
1093 if( 0 != IS_PLANAR(sfmt->trans)) {
1094 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1095 saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1096 saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1097 } else {
1098 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1099 }
1100
1101 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1102 if (err)
1103 goto oops;
1104 err = saa7146_pgtable_build(dev,buf);
1105 if (err)
1106 goto oops;
1107 }
1108 buf->vb.state = VIDEOBUF_PREPARED;
1109 buf->activate = buffer_activate;
1110
1111 return 0;
1112
1113 oops:
1114 DEB_D("error out\n");
1115 saa7146_dma_free(dev,q,buf);
1116
1117 return err;
1118 }
1119
1120 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1121 {
1122 struct file *file = q->priv_data;
1123 struct saa7146_fh *fh = file->private_data;
1124 struct saa7146_vv *vv = fh->dev->vv_data;
1125
1126 if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1127 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1128
1129 *size = vv->video_fmt.sizeimage;
1130
1131 /* check if we exceed the "max_memory" parameter */
1132 if( (*count * *size) > (max_memory*1048576) ) {
1133 *count = (max_memory*1048576) / *size;
1134 }
1135
1136 DEB_CAP("%d buffers, %d bytes each\n", *count, *size);
1137
1138 return 0;
1139 }
1140
1141 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1142 {
1143 struct file *file = q->priv_data;
1144 struct saa7146_fh *fh = file->private_data;
1145 struct saa7146_dev *dev = fh->dev;
1146 struct saa7146_vv *vv = dev->vv_data;
1147 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1148
1149 DEB_CAP("vbuf:%p\n", vb);
1150 saa7146_buffer_queue(fh->dev, &vv->video_dmaq, buf);
1151 }
1152
1153 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1154 {
1155 struct file *file = q->priv_data;
1156 struct saa7146_fh *fh = file->private_data;
1157 struct saa7146_dev *dev = fh->dev;
1158 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1159
1160 DEB_CAP("vbuf:%p\n", vb);
1161
1162 saa7146_dma_free(dev,q,buf);
1163
1164 release_all_pagetables(dev, buf);
1165 }
1166
1167 static const struct videobuf_queue_ops video_qops = {
1168 .buf_setup = buffer_setup,
1169 .buf_prepare = buffer_prepare,
1170 .buf_queue = buffer_queue,
1171 .buf_release = buffer_release,
1172 };
1173
1174 /********************************************************************************/
1175 /* file operations */
1176
1177 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1178 {
1179 INIT_LIST_HEAD(&vv->video_dmaq.queue);
1180
1181 timer_setup(&vv->video_dmaq.timeout, saa7146_buffer_timeout, 0);
1182 vv->video_dmaq.dev = dev;
1183
1184 /* set some default values */
1185 vv->standard = &dev->ext_vv_data->stds[0];
1186
1187 /* FIXME: what's this? */
1188 vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1189 vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1190 }
1191
1192
1193 static int video_open(struct saa7146_dev *dev, struct file *file)
1194 {
1195 struct saa7146_fh *fh = file->private_data;
1196
1197 videobuf_queue_sg_init(&fh->video_q, &video_qops,
1198 &dev->pci->dev, &dev->slock,
1199 V4L2_BUF_TYPE_VIDEO_CAPTURE,
1200 V4L2_FIELD_INTERLACED,
1201 sizeof(struct saa7146_buf),
1202 file, &dev->v4l2_lock);
1203
1204 return 0;
1205 }
1206
1207
1208 static void video_close(struct saa7146_dev *dev, struct file *file)
1209 {
1210 struct saa7146_fh *fh = file->private_data;
1211 struct saa7146_vv *vv = dev->vv_data;
1212 struct videobuf_queue *q = &fh->video_q;
1213
1214 if (IS_CAPTURE_ACTIVE(fh) != 0)
1215 video_end(fh, file);
1216 else if (IS_OVERLAY_ACTIVE(fh) != 0)
1217 saa7146_stop_preview(fh);
1218
1219 videobuf_stop(q);
1220 /* hmm, why is this function declared void? */
1221 }
1222
1223
1224 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1225 {
1226 struct saa7146_vv *vv = dev->vv_data;
1227 struct saa7146_dmaqueue *q = &vv->video_dmaq;
1228
1229 spin_lock(&dev->slock);
1230 DEB_CAP("called\n");
1231
1232 /* only finish the buffer if we have one... */
1233 if( NULL != q->curr ) {
1234 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1235 }
1236 saa7146_buffer_next(dev,q,0);
1237
1238 spin_unlock(&dev->slock);
1239 }
1240
1241 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1242 {
1243 struct saa7146_fh *fh = file->private_data;
1244 struct saa7146_dev *dev = fh->dev;
1245 struct saa7146_vv *vv = dev->vv_data;
1246 ssize_t ret = 0;
1247
1248 DEB_EE("called\n");
1249
1250 if ((vv->video_status & STATUS_CAPTURE) != 0) {
1251 /* fixme: should we allow read() captures while streaming capture? */
1252 if (vv->video_fh == fh) {
1253 DEB_S("already capturing\n");
1254 return -EBUSY;
1255 }
1256 DEB_S("already capturing in another open\n");
1257 return -EBUSY;
1258 }
1259
1260 ret = video_begin(fh);
1261 if( 0 != ret) {
1262 goto out;
1263 }
1264
1265 ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1266 file->f_flags & O_NONBLOCK);
1267 if (ret != 0) {
1268 video_end(fh, file);
1269 } else {
1270 ret = video_end(fh, file);
1271 }
1272 out:
1273 /* restart overlay if it was active before */
1274 if (vv->ov_suspend != NULL) {
1275 saa7146_start_preview(vv->ov_suspend);
1276 vv->ov_suspend = NULL;
1277 }
1278
1279 return ret;
1280 }
1281
1282 const struct saa7146_use_ops saa7146_video_uops = {
1283 .init = video_init,
1284 .open = video_open,
1285 .release = video_close,
1286 .irq_done = video_irq_done,
1287 .read = video_read,
1288 };
Linux with added FPC-III support