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