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sh_eth: R8A7740 supports packet shecksumming
[linux/fpc-iii.git] / drivers / media / common / saa7146 / saa7146_video.c
blobe034bcfcf757fd118d1caf9481ff1019d7b383fe
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_dmaqueue *q = &vv->video_dmaq;
394 struct saa7146_format *fmt = NULL;
395 unsigned long flags;
396 unsigned int resource;
397 u32 dmas = 0;
398 DEB_EE("dev:%p, fh:%p\n", dev, fh);
399
400 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
401 DEB_S("not capturing\n");
402 return 0;
403 }
404
405 if (vv->video_fh != fh) {
406 DEB_S("capturing, but in another open\n");
407 return -EBUSY;
408 }
409
410 fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat);
411 /* we need to have a valid format set here */
412 BUG_ON(NULL == fmt);
413
414 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
415 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
416 dmas = MASK_22 | MASK_21 | MASK_20;
417 } else {
418 resource = RESOURCE_DMA1_HPS;
419 dmas = MASK_22;
420 }
421 spin_lock_irqsave(&dev->slock,flags);
422
423 /* disable rps0 */
424 saa7146_write(dev, MC1, MASK_28);
425
426 /* disable rps0 irqs */
427 SAA7146_IER_DISABLE(dev, MASK_27);
428
429 /* shut down all used video dma transfers */
430 saa7146_write(dev, MC1, dmas);
431
432 if (q->curr)
433 saa7146_buffer_finish(dev, q, VIDEOBUF_DONE);
434
435 spin_unlock_irqrestore(&dev->slock, flags);
436
437 vv->video_fh = NULL;
438 vv->video_status = 0;
439
440 saa7146_res_free(fh, resource);
441
442 if (vv->ov_suspend != NULL) {
443 saa7146_start_preview(vv->ov_suspend);
444 vv->ov_suspend = NULL;
445 }
446
447 return 0;
448 }
449
450 static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
451 {
452 struct video_device *vdev = video_devdata(file);
453 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
454
455 strcpy((char *)cap->driver, "saa7146 v4l2");
456 strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
457 sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci));
458 cap->device_caps =
459 V4L2_CAP_VIDEO_CAPTURE |
460 V4L2_CAP_VIDEO_OVERLAY |
461 V4L2_CAP_READWRITE |
462 V4L2_CAP_STREAMING;
463 cap->device_caps |= dev->ext_vv_data->capabilities;
464 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
465 if (vdev->vfl_type == VFL_TYPE_GRABBER)
466 cap->device_caps &=
467 ~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT);
468 else
469 cap->device_caps &=
470 ~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY | V4L2_CAP_AUDIO);
471 return 0;
472 }
473
474 static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
475 {
476 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
477 struct saa7146_vv *vv = dev->vv_data;
478
479 *fb = vv->ov_fb;
480 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
481 fb->flags = V4L2_FBUF_FLAG_PRIMARY;
482 return 0;
483 }
484
485 static int vidioc_s_fbuf(struct file *file, void *fh, const struct v4l2_framebuffer *fb)
486 {
487 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
488 struct saa7146_vv *vv = dev->vv_data;
489 struct saa7146_format *fmt;
490
491 DEB_EE("VIDIOC_S_FBUF\n");
492
493 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
494 return -EPERM;
495
496 /* check args */
497 fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat);
498 if (NULL == fmt)
499 return -EINVAL;
500
501 /* planar formats are not allowed for overlay video, clipping and video dma would clash */
502 if (fmt->flags & FORMAT_IS_PLANAR)
503 DEB_S("planar pixelformat '%4.4s' not allowed for overlay\n",
504 (char *)&fmt->pixelformat);
505
506 /* check if overlay is running */
507 if (IS_OVERLAY_ACTIVE(fh) != 0) {
508 if (vv->video_fh != fh) {
509 DEB_D("refusing to change framebuffer information while overlay is active in another open\n");
510 return -EBUSY;
511 }
512 }
513
514 /* ok, accept it */
515 vv->ov_fb = *fb;
516 vv->ov_fmt = fmt;
517
518 if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) {
519 vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8;
520 DEB_D("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline);
521 }
522 return 0;
523 }
524
525 static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
526 {
527 if (f->index >= NUM_FORMATS)
528 return -EINVAL;
529 strlcpy((char *)f->description, formats[f->index].name,
530 sizeof(f->description));
531 f->pixelformat = formats[f->index].pixelformat;
532 return 0;
533 }
534
535 int saa7146_s_ctrl(struct v4l2_ctrl *ctrl)
536 {
537 struct saa7146_dev *dev = container_of(ctrl->handler,
538 struct saa7146_dev, ctrl_handler);
539 struct saa7146_vv *vv = dev->vv_data;
540 u32 val;
541
542 switch (ctrl->id) {
543 case V4L2_CID_BRIGHTNESS:
544 val = saa7146_read(dev, BCS_CTRL);
545 val &= 0x00ffffff;
546 val |= (ctrl->val << 24);
547 saa7146_write(dev, BCS_CTRL, val);
548 saa7146_write(dev, MC2, MASK_22 | MASK_06);
549 break;
550
551 case V4L2_CID_CONTRAST:
552 val = saa7146_read(dev, BCS_CTRL);
553 val &= 0xff00ffff;
554 val |= (ctrl->val << 16);
555 saa7146_write(dev, BCS_CTRL, val);
556 saa7146_write(dev, MC2, MASK_22 | MASK_06);
557 break;
558
559 case V4L2_CID_SATURATION:
560 val = saa7146_read(dev, BCS_CTRL);
561 val &= 0xffffff00;
562 val |= (ctrl->val << 0);
563 saa7146_write(dev, BCS_CTRL, val);
564 saa7146_write(dev, MC2, MASK_22 | MASK_06);
565 break;
566
567 case V4L2_CID_HFLIP:
568 /* fixme: we can support changing VFLIP and HFLIP here... */
569 if ((vv->video_status & STATUS_CAPTURE))
570 return -EBUSY;
571 vv->hflip = ctrl->val;
572 break;
573
574 case V4L2_CID_VFLIP:
575 if ((vv->video_status & STATUS_CAPTURE))
576 return -EBUSY;
577 vv->vflip = ctrl->val;
578 break;
579
580 default:
581 return -EINVAL;
582 }
583
584 if ((vv->video_status & STATUS_OVERLAY) != 0) { /* CHECK: && (vv->video_fh == fh)) */
585 struct saa7146_fh *fh = vv->video_fh;
586
587 saa7146_stop_preview(fh);
588 saa7146_start_preview(fh);
589 }
590 return 0;
591 }
592
593 static int vidioc_g_parm(struct file *file, void *fh,
594 struct v4l2_streamparm *parm)
595 {
596 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
597 struct saa7146_vv *vv = dev->vv_data;
598
599 if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
600 return -EINVAL;
601 parm->parm.capture.readbuffers = 1;
602 v4l2_video_std_frame_period(vv->standard->id,
603 &parm->parm.capture.timeperframe);
604 return 0;
605 }
606
607 static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
608 {
609 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
610 struct saa7146_vv *vv = dev->vv_data;
611
612 f->fmt.pix = vv->video_fmt;
613 return 0;
614 }
615
616 static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
617 {
618 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
619 struct saa7146_vv *vv = dev->vv_data;
620
621 f->fmt.win = vv->ov.win;
622 return 0;
623 }
624
625 static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f)
626 {
627 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
628 struct saa7146_vv *vv = dev->vv_data;
629
630 f->fmt.vbi = vv->vbi_fmt;
631 return 0;
632 }
633
634 static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
635 {
636 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
637 struct saa7146_vv *vv = dev->vv_data;
638 struct saa7146_format *fmt;
639 enum v4l2_field field;
640 int maxw, maxh;
641 int calc_bpl;
642
643 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
644
645 fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat);
646 if (NULL == fmt)
647 return -EINVAL;
648
649 field = f->fmt.pix.field;
650 maxw = vv->standard->h_max_out;
651 maxh = vv->standard->v_max_out;
652
653 if (V4L2_FIELD_ANY == field) {
654 field = (f->fmt.pix.height > maxh / 2)
655 ? V4L2_FIELD_INTERLACED
656 : V4L2_FIELD_BOTTOM;
657 }
658 switch (field) {
659 case V4L2_FIELD_ALTERNATE:
660 vv->last_field = V4L2_FIELD_TOP;
661 maxh = maxh / 2;
662 break;
663 case V4L2_FIELD_TOP:
664 case V4L2_FIELD_BOTTOM:
665 vv->last_field = V4L2_FIELD_INTERLACED;
666 maxh = maxh / 2;
667 break;
668 case V4L2_FIELD_INTERLACED:
669 vv->last_field = V4L2_FIELD_INTERLACED;
670 break;
671 default:
672 DEB_D("no known field mode '%d'\n", field);
673 return -EINVAL;
674 }
675
676 f->fmt.pix.field = field;
677 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
678 if (f->fmt.pix.width > maxw)
679 f->fmt.pix.width = maxw;
680 if (f->fmt.pix.height > maxh)
681 f->fmt.pix.height = maxh;
682
683 calc_bpl = (f->fmt.pix.width * fmt->depth) / 8;
684
685 if (f->fmt.pix.bytesperline < calc_bpl)
686 f->fmt.pix.bytesperline = calc_bpl;
687
688 if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */
689 f->fmt.pix.bytesperline = calc_bpl;
690
691 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
692 DEB_D("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n",
693 f->fmt.pix.width, f->fmt.pix.height,
694 f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
695
696 return 0;
697 }
698
699
700 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
701 {
702 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
703 struct saa7146_vv *vv = dev->vv_data;
704 struct v4l2_window *win = &f->fmt.win;
705 enum v4l2_field field;
706 int maxw, maxh;
707
708 DEB_EE("dev:%p\n", dev);
709
710 if (NULL == vv->ov_fb.base) {
711 DEB_D("no fb base set\n");
712 return -EINVAL;
713 }
714 if (NULL == vv->ov_fmt) {
715 DEB_D("no fb fmt set\n");
716 return -EINVAL;
717 }
718 if (win->w.width < 48 || win->w.height < 32) {
719 DEB_D("min width/height. (%d,%d)\n",
720 win->w.width, win->w.height);
721 return -EINVAL;
722 }
723 if (win->clipcount > 16) {
724 DEB_D("clipcount too big\n");
725 return -EINVAL;
726 }
727
728 field = win->field;
729 maxw = vv->standard->h_max_out;
730 maxh = vv->standard->v_max_out;
731
732 if (V4L2_FIELD_ANY == field) {
733 field = (win->w.height > maxh / 2)
734 ? V4L2_FIELD_INTERLACED
735 : V4L2_FIELD_TOP;
736 }
737 switch (field) {
738 case V4L2_FIELD_TOP:
739 case V4L2_FIELD_BOTTOM:
740 case V4L2_FIELD_ALTERNATE:
741 maxh = maxh / 2;
742 break;
743 case V4L2_FIELD_INTERLACED:
744 break;
745 default:
746 DEB_D("no known field mode '%d'\n", field);
747 return -EINVAL;
748 }
749
750 win->field = field;
751 if (win->w.width > maxw)
752 win->w.width = maxw;
753 if (win->w.height > maxh)
754 win->w.height = maxh;
755
756 return 0;
757 }
758
759 static int vidioc_s_fmt_vid_cap(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_CAPTURE: dev:%p, fh:%p\n", dev, fh);
767 if (IS_CAPTURE_ACTIVE(fh) != 0) {
768 DEB_EE("streaming capture is active\n");
769 return -EBUSY;
770 }
771 err = vidioc_try_fmt_vid_cap(file, fh, f);
772 if (0 != err)
773 return err;
774 vv->video_fmt = f->fmt.pix;
775 DEB_EE("set to pixelformat '%4.4s'\n",
776 (char *)&vv->video_fmt.pixelformat);
777 return 0;
778 }
779
780 static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f)
781 {
782 struct saa7146_fh *fh = __fh;
783 struct saa7146_dev *dev = fh->dev;
784 struct saa7146_vv *vv = dev->vv_data;
785 int err;
786
787 DEB_EE("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh);
788 err = vidioc_try_fmt_vid_overlay(file, fh, f);
789 if (0 != err)
790 return err;
791 vv->ov.win = f->fmt.win;
792 vv->ov.nclips = f->fmt.win.clipcount;
793 if (vv->ov.nclips > 16)
794 vv->ov.nclips = 16;
795 if (copy_from_user(vv->ov.clips, f->fmt.win.clips,
796 sizeof(struct v4l2_clip) * vv->ov.nclips)) {
797 return -EFAULT;
798 }
799
800 /* vv->ov.fh is used to indicate that we have valid overlay informations, too */
801 vv->ov.fh = fh;
802
803 /* check if our current overlay is active */
804 if (IS_OVERLAY_ACTIVE(fh) != 0) {
805 saa7146_stop_preview(fh);
806 saa7146_start_preview(fh);
807 }
808 return 0;
809 }
810
811 static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm)
812 {
813 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
814 struct saa7146_vv *vv = dev->vv_data;
815
816 *norm = vv->standard->id;
817 return 0;
818 }
819
820 /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
821 PAL / NTSC / SECAM. if your hardware does not (or does more)
822 -- override this function in your extension */
823 /*
824 case VIDIOC_ENUMSTD:
825 {
826 struct v4l2_standard *e = arg;
827 if (e->index < 0 )
828 return -EINVAL;
829 if( e->index < dev->ext_vv_data->num_stds ) {
830 DEB_EE("VIDIOC_ENUMSTD: index:%d\n", e->index);
831 v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
832 return 0;
833 }
834 return -EINVAL;
835 }
836 */
837
838 static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id id)
839 {
840 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
841 struct saa7146_vv *vv = dev->vv_data;
842 int found = 0;
843 int err, i;
844
845 DEB_EE("VIDIOC_S_STD\n");
846
847 if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
848 DEB_D("cannot change video standard while streaming capture is active\n");
849 return -EBUSY;
850 }
851
852 if ((vv->video_status & STATUS_OVERLAY) != 0) {
853 vv->ov_suspend = vv->video_fh;
854 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
855 if (0 != err) {
856 DEB_D("suspending video failed. aborting\n");
857 return err;
858 }
859 }
860
861 for (i = 0; i < dev->ext_vv_data->num_stds; i++)
862 if (id & dev->ext_vv_data->stds[i].id)
863 break;
864 if (i != dev->ext_vv_data->num_stds) {
865 vv->standard = &dev->ext_vv_data->stds[i];
866 if (NULL != dev->ext_vv_data->std_callback)
867 dev->ext_vv_data->std_callback(dev, vv->standard);
868 found = 1;
869 }
870
871 if (vv->ov_suspend != NULL) {
872 saa7146_start_preview(vv->ov_suspend);
873 vv->ov_suspend = NULL;
874 }
875
876 if (!found) {
877 DEB_EE("VIDIOC_S_STD: standard not found\n");
878 return -EINVAL;
879 }
880
881 DEB_EE("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name);
882 return 0;
883 }
884
885 static int vidioc_overlay(struct file *file, void *fh, unsigned int on)
886 {
887 int err;
888
889 DEB_D("VIDIOC_OVERLAY on:%d\n", on);
890 if (on)
891 err = saa7146_start_preview(fh);
892 else
893 err = saa7146_stop_preview(fh);
894 return err;
895 }
896
897 static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b)
898 {
899 struct saa7146_fh *fh = __fh;
900
901 if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
902 return videobuf_reqbufs(&fh->video_q, b);
903 if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE)
904 return videobuf_reqbufs(&fh->vbi_q, b);
905 return -EINVAL;
906 }
907
908 static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
909 {
910 struct saa7146_fh *fh = __fh;
911
912 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
913 return videobuf_querybuf(&fh->video_q, buf);
914 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
915 return videobuf_querybuf(&fh->vbi_q, buf);
916 return -EINVAL;
917 }
918
919 static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
920 {
921 struct saa7146_fh *fh = __fh;
922
923 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
924 return videobuf_qbuf(&fh->video_q, buf);
925 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
926 return videobuf_qbuf(&fh->vbi_q, buf);
927 return -EINVAL;
928 }
929
930 static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
931 {
932 struct saa7146_fh *fh = __fh;
933
934 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
935 return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK);
936 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
937 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK);
938 return -EINVAL;
939 }
940
941 static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
942 {
943 struct saa7146_fh *fh = __fh;
944 int err;
945
946 DEB_D("VIDIOC_STREAMON, type:%d\n", type);
947
948 err = video_begin(fh);
949 if (err)
950 return err;
951 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
952 return videobuf_streamon(&fh->video_q);
953 if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
954 return videobuf_streamon(&fh->vbi_q);
955 return -EINVAL;
956 }
957
958 static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
959 {
960 struct saa7146_fh *fh = __fh;
961 struct saa7146_dev *dev = fh->dev;
962 struct saa7146_vv *vv = dev->vv_data;
963 int err;
964
965 DEB_D("VIDIOC_STREAMOFF, type:%d\n", type);
966
967 /* ugly: we need to copy some checks from video_end(),
968 because videobuf_streamoff() relies on the capture running.
969 check and fix this */
970 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
971 DEB_S("not capturing\n");
972 return 0;
973 }
974
975 if (vv->video_fh != fh) {
976 DEB_S("capturing, but in another open\n");
977 return -EBUSY;
978 }
979
980 err = -EINVAL;
981 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
982 err = videobuf_streamoff(&fh->video_q);
983 else if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
984 err = videobuf_streamoff(&fh->vbi_q);
985 if (0 != err) {
986 DEB_D("warning: videobuf_streamoff() failed\n");
987 video_end(fh, file);
988 } else {
989 err = video_end(fh, file);
990 }
991 return err;
992 }
993
994 const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
995 .vidioc_querycap = vidioc_querycap,
996 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
997 .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap,
998 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
999 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1000 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1001 .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_vid_overlay,
1002 .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_vid_overlay,
1003 .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_vid_overlay,
1004
1005 .vidioc_overlay = vidioc_overlay,
1006 .vidioc_g_fbuf = vidioc_g_fbuf,
1007 .vidioc_s_fbuf = vidioc_s_fbuf,
1008 .vidioc_reqbufs = vidioc_reqbufs,
1009 .vidioc_querybuf = vidioc_querybuf,
1010 .vidioc_qbuf = vidioc_qbuf,
1011 .vidioc_dqbuf = vidioc_dqbuf,
1012 .vidioc_g_std = vidioc_g_std,
1013 .vidioc_s_std = vidioc_s_std,
1014 .vidioc_streamon = vidioc_streamon,
1015 .vidioc_streamoff = vidioc_streamoff,
1016 .vidioc_g_parm = vidioc_g_parm,
1017 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1018 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1019 };
1020
1021 const struct v4l2_ioctl_ops saa7146_vbi_ioctl_ops = {
1022 .vidioc_querycap = vidioc_querycap,
1023 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
1024
1025 .vidioc_reqbufs = vidioc_reqbufs,
1026 .vidioc_querybuf = vidioc_querybuf,
1027 .vidioc_qbuf = vidioc_qbuf,
1028 .vidioc_dqbuf = vidioc_dqbuf,
1029 .vidioc_g_std = vidioc_g_std,
1030 .vidioc_s_std = vidioc_s_std,
1031 .vidioc_streamon = vidioc_streamon,
1032 .vidioc_streamoff = vidioc_streamoff,
1033 .vidioc_g_parm = vidioc_g_parm,
1034 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1035 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1036 };
1037
1038 /*********************************************************************************/
1039 /* buffer handling functions */
1040
1041 static int buffer_activate (struct saa7146_dev *dev,
1042 struct saa7146_buf *buf,
1043 struct saa7146_buf *next)
1044 {
1045 struct saa7146_vv *vv = dev->vv_data;
1046
1047 buf->vb.state = VIDEOBUF_ACTIVE;
1048 saa7146_set_capture(dev,buf,next);
1049
1050 mod_timer(&vv->video_dmaq.timeout, jiffies+BUFFER_TIMEOUT);
1051 return 0;
1052 }
1053
1054 static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf)
1055 {
1056 saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1057 saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1058 saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1059 }
1060
1061 static int buffer_prepare(struct videobuf_queue *q,
1062 struct videobuf_buffer *vb, enum v4l2_field field)
1063 {
1064 struct file *file = q->priv_data;
1065 struct saa7146_fh *fh = file->private_data;
1066 struct saa7146_dev *dev = fh->dev;
1067 struct saa7146_vv *vv = dev->vv_data;
1068 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1069 int size,err = 0;
1070
1071 DEB_CAP("vbuf:%p\n", vb);
1072
1073 /* sanity checks */
1074 if (vv->video_fmt.width < 48 ||
1075 vv->video_fmt.height < 32 ||
1076 vv->video_fmt.width > vv->standard->h_max_out ||
1077 vv->video_fmt.height > vv->standard->v_max_out) {
1078 DEB_D("w (%d) / h (%d) out of bounds\n",
1079 vv->video_fmt.width, vv->video_fmt.height);
1080 return -EINVAL;
1081 }
1082
1083 size = vv->video_fmt.sizeimage;
1084 if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1085 DEB_D("size mismatch\n");
1086 return -EINVAL;
1087 }
1088
1089 DEB_CAP("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1090 vv->video_fmt.width, vv->video_fmt.height,
1091 size, v4l2_field_names[vv->video_fmt.field]);
1092 if (buf->vb.width != vv->video_fmt.width ||
1093 buf->vb.bytesperline != vv->video_fmt.bytesperline ||
1094 buf->vb.height != vv->video_fmt.height ||
1095 buf->vb.size != size ||
1096 buf->vb.field != field ||
1097 buf->vb.field != vv->video_fmt.field ||
1098 buf->fmt != &vv->video_fmt) {
1099 saa7146_dma_free(dev,q,buf);
1100 }
1101
1102 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1103 struct saa7146_format *sfmt;
1104
1105 buf->vb.bytesperline = vv->video_fmt.bytesperline;
1106 buf->vb.width = vv->video_fmt.width;
1107 buf->vb.height = vv->video_fmt.height;
1108 buf->vb.size = size;
1109 buf->vb.field = field;
1110 buf->fmt = &vv->video_fmt;
1111 buf->vb.field = vv->video_fmt.field;
1112
1113 sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
1114
1115 release_all_pagetables(dev, buf);
1116 if( 0 != IS_PLANAR(sfmt->trans)) {
1117 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1118 saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1119 saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1120 } else {
1121 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1122 }
1123
1124 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1125 if (err)
1126 goto oops;
1127 err = saa7146_pgtable_build(dev,buf);
1128 if (err)
1129 goto oops;
1130 }
1131 buf->vb.state = VIDEOBUF_PREPARED;
1132 buf->activate = buffer_activate;
1133
1134 return 0;
1135
1136 oops:
1137 DEB_D("error out\n");
1138 saa7146_dma_free(dev,q,buf);
1139
1140 return err;
1141 }
1142
1143 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1144 {
1145 struct file *file = q->priv_data;
1146 struct saa7146_fh *fh = file->private_data;
1147 struct saa7146_vv *vv = fh->dev->vv_data;
1148
1149 if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1150 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1151
1152 *size = vv->video_fmt.sizeimage;
1153
1154 /* check if we exceed the "max_memory" parameter */
1155 if( (*count * *size) > (max_memory*1048576) ) {
1156 *count = (max_memory*1048576) / *size;
1157 }
1158
1159 DEB_CAP("%d buffers, %d bytes each\n", *count, *size);
1160
1161 return 0;
1162 }
1163
1164 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1165 {
1166 struct file *file = q->priv_data;
1167 struct saa7146_fh *fh = file->private_data;
1168 struct saa7146_dev *dev = fh->dev;
1169 struct saa7146_vv *vv = dev->vv_data;
1170 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1171
1172 DEB_CAP("vbuf:%p\n", vb);
1173 saa7146_buffer_queue(fh->dev, &vv->video_dmaq, buf);
1174 }
1175
1176 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1177 {
1178 struct file *file = q->priv_data;
1179 struct saa7146_fh *fh = file->private_data;
1180 struct saa7146_dev *dev = fh->dev;
1181 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1182
1183 DEB_CAP("vbuf:%p\n", vb);
1184
1185 saa7146_dma_free(dev,q,buf);
1186
1187 release_all_pagetables(dev, buf);
1188 }
1189
1190 static struct videobuf_queue_ops video_qops = {
1191 .buf_setup = buffer_setup,
1192 .buf_prepare = buffer_prepare,
1193 .buf_queue = buffer_queue,
1194 .buf_release = buffer_release,
1195 };
1196
1197 /********************************************************************************/
1198 /* file operations */
1199
1200 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1201 {
1202 INIT_LIST_HEAD(&vv->video_dmaq.queue);
1203
1204 init_timer(&vv->video_dmaq.timeout);
1205 vv->video_dmaq.timeout.function = saa7146_buffer_timeout;
1206 vv->video_dmaq.timeout.data = (unsigned long)(&vv->video_dmaq);
1207 vv->video_dmaq.dev = dev;
1208
1209 /* set some default values */
1210 vv->standard = &dev->ext_vv_data->stds[0];
1211
1212 /* FIXME: what's this? */
1213 vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1214 vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1215 }
1216
1217
1218 static int video_open(struct saa7146_dev *dev, struct file *file)
1219 {
1220 struct saa7146_fh *fh = file->private_data;
1221
1222 videobuf_queue_sg_init(&fh->video_q, &video_qops,
1223 &dev->pci->dev, &dev->slock,
1224 V4L2_BUF_TYPE_VIDEO_CAPTURE,
1225 V4L2_FIELD_INTERLACED,
1226 sizeof(struct saa7146_buf),
1227 file, &dev->v4l2_lock);
1228
1229 return 0;
1230 }
1231
1232
1233 static void video_close(struct saa7146_dev *dev, struct file *file)
1234 {
1235 struct saa7146_fh *fh = file->private_data;
1236 struct saa7146_vv *vv = dev->vv_data;
1237 struct videobuf_queue *q = &fh->video_q;
1238
1239 if (IS_CAPTURE_ACTIVE(fh) != 0)
1240 video_end(fh, file);
1241 else if (IS_OVERLAY_ACTIVE(fh) != 0)
1242 saa7146_stop_preview(fh);
1243
1244 videobuf_stop(q);
1245 /* hmm, why is this function declared void? */
1246 }
1247
1248
1249 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1250 {
1251 struct saa7146_vv *vv = dev->vv_data;
1252 struct saa7146_dmaqueue *q = &vv->video_dmaq;
1253
1254 spin_lock(&dev->slock);
1255 DEB_CAP("called\n");
1256
1257 /* only finish the buffer if we have one... */
1258 if( NULL != q->curr ) {
1259 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1260 }
1261 saa7146_buffer_next(dev,q,0);
1262
1263 spin_unlock(&dev->slock);
1264 }
1265
1266 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1267 {
1268 struct saa7146_fh *fh = file->private_data;
1269 struct saa7146_dev *dev = fh->dev;
1270 struct saa7146_vv *vv = dev->vv_data;
1271 ssize_t ret = 0;
1272
1273 DEB_EE("called\n");
1274
1275 if ((vv->video_status & STATUS_CAPTURE) != 0) {
1276 /* fixme: should we allow read() captures while streaming capture? */
1277 if (vv->video_fh == fh) {
1278 DEB_S("already capturing\n");
1279 return -EBUSY;
1280 }
1281 DEB_S("already capturing in another open\n");
1282 return -EBUSY;
1283 }
1284
1285 ret = video_begin(fh);
1286 if( 0 != ret) {
1287 goto out;
1288 }
1289
1290 ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1291 file->f_flags & O_NONBLOCK);
1292 if (ret != 0) {
1293 video_end(fh, file);
1294 } else {
1295 ret = video_end(fh, file);
1296 }
1297 out:
1298 /* restart overlay if it was active before */
1299 if (vv->ov_suspend != NULL) {
1300 saa7146_start_preview(vv->ov_suspend);
1301 vv->ov_suspend = NULL;
1302 }
1303
1304 return ret;
1305 }
1306
1307 struct saa7146_use_ops saa7146_video_uops = {
1308 .init = video_init,
1309 .open = video_open,
1310 .release = video_close,
1311 .irq_done = video_irq_done,
1312 .read = video_read,
1313 };
Linux with added FPC-III support