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V4L/DVB (3516): Make video_buf more generic
[mirror_ubuntu-zesty-kernel.git] / drivers / media / common / saa7146_video.c
1 #include <media/saa7146_vv.h>
2
3 static int max_memory = 32;
4
5 module_param(max_memory, int, 0644);
6 MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)");
7
8 #define IS_CAPTURE_ACTIVE(fh) \
9 (((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh))
10
11 #define IS_OVERLAY_ACTIVE(fh) \
12 (((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh))
13
14 /* format descriptions for capture and preview */
15 static struct saa7146_format formats[] = {
16 {
17 .name = "RGB-8 (3-3-2)",
18 .pixelformat = V4L2_PIX_FMT_RGB332,
19 .trans = RGB08_COMPOSED,
20 .depth = 8,
21 .flags = 0,
22 }, {
23 .name = "RGB-16 (5/B-6/G-5/R)",
24 .pixelformat = V4L2_PIX_FMT_RGB565,
25 .trans = RGB16_COMPOSED,
26 .depth = 16,
27 .flags = 0,
28 }, {
29 .name = "RGB-24 (B-G-R)",
30 .pixelformat = V4L2_PIX_FMT_BGR24,
31 .trans = RGB24_COMPOSED,
32 .depth = 24,
33 .flags = 0,
34 }, {
35 .name = "RGB-32 (B-G-R)",
36 .pixelformat = V4L2_PIX_FMT_BGR32,
37 .trans = RGB32_COMPOSED,
38 .depth = 32,
39 .flags = 0,
40 }, {
41 .name = "RGB-32 (R-G-B)",
42 .pixelformat = V4L2_PIX_FMT_RGB32,
43 .trans = RGB32_COMPOSED,
44 .depth = 32,
45 .flags = 0,
46 .swap = 0x2,
47 }, {
48 .name = "Greyscale-8",
49 .pixelformat = V4L2_PIX_FMT_GREY,
50 .trans = Y8,
51 .depth = 8,
52 .flags = 0,
53 }, {
54 .name = "YUV 4:2:2 planar (Y-Cb-Cr)",
55 .pixelformat = V4L2_PIX_FMT_YUV422P,
56 .trans = YUV422_DECOMPOSED,
57 .depth = 16,
58 .flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
59 }, {
60 .name = "YVU 4:2:0 planar (Y-Cb-Cr)",
61 .pixelformat = V4L2_PIX_FMT_YVU420,
62 .trans = YUV420_DECOMPOSED,
63 .depth = 12,
64 .flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
65 }, {
66 .name = "YUV 4:2:0 planar (Y-Cb-Cr)",
67 .pixelformat = V4L2_PIX_FMT_YUV420,
68 .trans = YUV420_DECOMPOSED,
69 .depth = 12,
70 .flags = FORMAT_IS_PLANAR,
71 }, {
72 .name = "YUV 4:2:2 (U-Y-V-Y)",
73 .pixelformat = V4L2_PIX_FMT_UYVY,
74 .trans = YUV422_COMPOSED,
75 .depth = 16,
76 .flags = 0,
77 }
78 };
79
80 /* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps.
81 due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped
82 (like V4L2_PIX_FMT_YUYV) ... 8-( */
83
84 static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
85
86 struct saa7146_format* format_by_fourcc(struct saa7146_dev *dev, int fourcc)
87 {
88 int i, j = NUM_FORMATS;
89
90 for (i = 0; i < j; i++) {
91 if (formats[i].pixelformat == fourcc) {
92 return formats+i;
93 }
94 }
95
96 DEB_D(("unknown pixelformat:'%4.4s'\n",(char *)&fourcc));
97 return NULL;
98 }
99
100 static int g_fmt(struct saa7146_fh *fh, struct v4l2_format *f)
101 {
102 struct saa7146_dev *dev = fh->dev;
103 DEB_EE(("dev:%p, fh:%p\n",dev,fh));
104
105 switch (f->type) {
106 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
107 f->fmt.pix = fh->video_fmt;
108 return 0;
109 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
110 f->fmt.win = fh->ov.win;
111 return 0;
112 case V4L2_BUF_TYPE_VBI_CAPTURE:
113 {
114 f->fmt.vbi = fh->vbi_fmt;
115 return 0;
116 }
117 default:
118 DEB_D(("invalid format type '%d'.\n",f->type));
119 return -EINVAL;
120 }
121 }
122
123 static int try_win(struct saa7146_dev *dev, struct v4l2_window *win)
124 {
125 struct saa7146_vv *vv = dev->vv_data;
126 enum v4l2_field field;
127 int maxw, maxh;
128
129 DEB_EE(("dev:%p\n",dev));
130
131 if (NULL == vv->ov_fb.base) {
132 DEB_D(("no fb base set.\n"));
133 return -EINVAL;
134 }
135 if (NULL == vv->ov_fmt) {
136 DEB_D(("no fb fmt set.\n"));
137 return -EINVAL;
138 }
139 if (win->w.width < 48 || win->w.height < 32) {
140 DEB_D(("min width/height. (%d,%d)\n",win->w.width,win->w.height));
141 return -EINVAL;
142 }
143 if (win->clipcount > 16) {
144 DEB_D(("clipcount too big.\n"));
145 return -EINVAL;
146 }
147
148 field = win->field;
149 maxw = vv->standard->h_max_out;
150 maxh = vv->standard->v_max_out;
151
152 if (V4L2_FIELD_ANY == field) {
153 field = (win->w.height > maxh/2)
154 ? V4L2_FIELD_INTERLACED
155 : V4L2_FIELD_TOP;
156 }
157 switch (field) {
158 case V4L2_FIELD_TOP:
159 case V4L2_FIELD_BOTTOM:
160 case V4L2_FIELD_ALTERNATE:
161 maxh = maxh / 2;
162 break;
163 case V4L2_FIELD_INTERLACED:
164 break;
165 default: {
166 DEB_D(("no known field mode '%d'.\n",field));
167 return -EINVAL;
168 }
169 }
170
171 win->field = field;
172 if (win->w.width > maxw)
173 win->w.width = maxw;
174 if (win->w.height > maxh)
175 win->w.height = maxh;
176
177 return 0;
178 }
179
180 static int try_fmt(struct saa7146_fh *fh, struct v4l2_format *f)
181 {
182 struct saa7146_dev *dev = fh->dev;
183 struct saa7146_vv *vv = dev->vv_data;
184 int err;
185
186 switch (f->type) {
187 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
188 {
189 struct saa7146_format *fmt;
190 enum v4l2_field field;
191 int maxw, maxh;
192 int calc_bpl;
193
194 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n",dev,fh));
195
196 fmt = format_by_fourcc(dev,f->fmt.pix.pixelformat);
197 if (NULL == fmt) {
198 return -EINVAL;
199 }
200
201 field = f->fmt.pix.field;
202 maxw = vv->standard->h_max_out;
203 maxh = vv->standard->v_max_out;
204
205 if (V4L2_FIELD_ANY == field) {
206 field = (f->fmt.pix.height > maxh/2)
207 ? V4L2_FIELD_INTERLACED
208 : V4L2_FIELD_BOTTOM;
209 }
210 switch (field) {
211 case V4L2_FIELD_ALTERNATE: {
212 vv->last_field = V4L2_FIELD_TOP;
213 maxh = maxh / 2;
214 break;
215 }
216 case V4L2_FIELD_TOP:
217 case V4L2_FIELD_BOTTOM:
218 vv->last_field = V4L2_FIELD_INTERLACED;
219 maxh = maxh / 2;
220 break;
221 case V4L2_FIELD_INTERLACED:
222 vv->last_field = V4L2_FIELD_INTERLACED;
223 break;
224 default: {
225 DEB_D(("no known field mode '%d'.\n",field));
226 return -EINVAL;
227 }
228 }
229
230 f->fmt.pix.field = field;
231 if (f->fmt.pix.width > maxw)
232 f->fmt.pix.width = maxw;
233 if (f->fmt.pix.height > maxh)
234 f->fmt.pix.height = maxh;
235
236 calc_bpl = (f->fmt.pix.width * fmt->depth)/8;
237
238 if (f->fmt.pix.bytesperline < calc_bpl)
239 f->fmt.pix.bytesperline = calc_bpl;
240
241 if (f->fmt.pix.bytesperline > (2*PAGE_SIZE * fmt->depth)/8) /* arbitrary constraint */
242 f->fmt.pix.bytesperline = calc_bpl;
243
244 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
245 DEB_D(("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n",f->fmt.pix.width,f->fmt.pix.height,f->fmt.pix.bytesperline,f->fmt.pix.sizeimage));
246
247 return 0;
248 }
249 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
250 DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n",dev,fh));
251 err = try_win(dev,&f->fmt.win);
252 if (0 != err) {
253 return err;
254 }
255 return 0;
256 default:
257 DEB_EE(("unknown format type '%d'\n",f->type));
258 return -EINVAL;
259 }
260 }
261
262 int saa7146_start_preview(struct saa7146_fh *fh)
263 {
264 struct saa7146_dev *dev = fh->dev;
265 struct saa7146_vv *vv = dev->vv_data;
266 int ret = 0, err = 0;
267
268 DEB_EE(("dev:%p, fh:%p\n",dev,fh));
269
270 /* check if we have overlay informations */
271 if( NULL == fh->ov.fh ) {
272 DEB_D(("no overlay data available. try S_FMT first.\n"));
273 return -EAGAIN;
274 }
275
276 /* check if streaming capture is running */
277 if (IS_CAPTURE_ACTIVE(fh) != 0) {
278 DEB_D(("streaming capture is active.\n"));
279 return -EBUSY;
280 }
281
282 /* check if overlay is running */
283 if (IS_OVERLAY_ACTIVE(fh) != 0) {
284 if (vv->video_fh == fh) {
285 DEB_D(("overlay is already active.\n"));
286 return 0;
287 }
288 DEB_D(("overlay is already active in another open.\n"));
289 return -EBUSY;
290 }
291
292 if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
293 DEB_D(("cannot get necessary overlay resources\n"));
294 return -EBUSY;
295 }
296
297 err = try_win(dev,&fh->ov.win);
298 if (0 != err) {
299 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
300 return -EBUSY;
301 }
302
303 vv->ov_data = &fh->ov;
304
305 DEB_D(("%dx%d+%d+%d %s field=%s\n",
306 fh->ov.win.w.width,fh->ov.win.w.height,
307 fh->ov.win.w.left,fh->ov.win.w.top,
308 vv->ov_fmt->name,v4l2_field_names[fh->ov.win.field]));
309
310 if (0 != (ret = saa7146_enable_overlay(fh))) {
311 DEB_D(("enabling overlay failed: %d\n",ret));
312 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
313 return ret;
314 }
315
316 vv->video_status = STATUS_OVERLAY;
317 vv->video_fh = fh;
318
319 return 0;
320 }
321
322 int saa7146_stop_preview(struct saa7146_fh *fh)
323 {
324 struct saa7146_dev *dev = fh->dev;
325 struct saa7146_vv *vv = dev->vv_data;
326
327 DEB_EE(("dev:%p, fh:%p\n",dev,fh));
328
329 /* check if streaming capture is running */
330 if (IS_CAPTURE_ACTIVE(fh) != 0) {
331 DEB_D(("streaming capture is active.\n"));
332 return -EBUSY;
333 }
334
335 /* check if overlay is running at all */
336 if ((vv->video_status & STATUS_OVERLAY) == 0) {
337 DEB_D(("no active overlay.\n"));
338 return 0;
339 }
340
341 if (vv->video_fh != fh) {
342 DEB_D(("overlay is active, but in another open.\n"));
343 return -EBUSY;
344 }
345
346 vv->video_status = 0;
347 vv->video_fh = NULL;
348
349 saa7146_disable_overlay(fh);
350
351 saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
352
353 return 0;
354 }
355
356 static int s_fmt(struct saa7146_fh *fh, struct v4l2_format *f)
357 {
358 struct saa7146_dev *dev = fh->dev;
359 struct saa7146_vv *vv = dev->vv_data;
360
361 int err;
362
363 switch (f->type) {
364 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
365 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n",dev,fh));
366 if (IS_CAPTURE_ACTIVE(fh) != 0) {
367 DEB_EE(("streaming capture is active\n"));
368 return -EBUSY;
369 }
370 err = try_fmt(fh,f);
371 if (0 != err)
372 return err;
373 fh->video_fmt = f->fmt.pix;
374 DEB_EE(("set to pixelformat '%4.4s'\n",(char *)&fh->video_fmt.pixelformat));
375 return 0;
376 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
377 DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n",dev,fh));
378 err = try_win(dev,&f->fmt.win);
379 if (0 != err)
380 return err;
381 mutex_lock(&dev->lock);
382 fh->ov.win = f->fmt.win;
383 fh->ov.nclips = f->fmt.win.clipcount;
384 if (fh->ov.nclips > 16)
385 fh->ov.nclips = 16;
386 if (copy_from_user(fh->ov.clips,f->fmt.win.clips,sizeof(struct v4l2_clip)*fh->ov.nclips)) {
387 mutex_unlock(&dev->lock);
388 return -EFAULT;
389 }
390
391 /* fh->ov.fh is used to indicate that we have valid overlay informations, too */
392 fh->ov.fh = fh;
393
394 mutex_unlock(&dev->lock);
395
396 /* check if our current overlay is active */
397 if (IS_OVERLAY_ACTIVE(fh) != 0) {
398 saa7146_stop_preview(fh);
399 saa7146_start_preview(fh);
400 }
401 return 0;
402 default:
403 DEB_D(("unknown format type '%d'\n",f->type));
404 return -EINVAL;
405 }
406 }
407
408 /********************************************************************************/
409 /* device controls */
410
411 static struct v4l2_queryctrl controls[] = {
412 {
413 .id = V4L2_CID_BRIGHTNESS,
414 .name = "Brightness",
415 .minimum = 0,
416 .maximum = 255,
417 .step = 1,
418 .default_value = 128,
419 .type = V4L2_CTRL_TYPE_INTEGER,
420 },{
421 .id = V4L2_CID_CONTRAST,
422 .name = "Contrast",
423 .minimum = 0,
424 .maximum = 127,
425 .step = 1,
426 .default_value = 64,
427 .type = V4L2_CTRL_TYPE_INTEGER,
428 },{
429 .id = V4L2_CID_SATURATION,
430 .name = "Saturation",
431 .minimum = 0,
432 .maximum = 127,
433 .step = 1,
434 .default_value = 64,
435 .type = V4L2_CTRL_TYPE_INTEGER,
436 },{
437 .id = V4L2_CID_VFLIP,
438 .name = "Vertical flip",
439 .minimum = 0,
440 .maximum = 1,
441 .type = V4L2_CTRL_TYPE_BOOLEAN,
442 },{
443 .id = V4L2_CID_HFLIP,
444 .name = "Horizontal flip",
445 .minimum = 0,
446 .maximum = 1,
447 .type = V4L2_CTRL_TYPE_BOOLEAN,
448 },
449 };
450 static int NUM_CONTROLS = sizeof(controls)/sizeof(struct v4l2_queryctrl);
451
452 #define V4L2_CID_PRIVATE_LASTP1 (V4L2_CID_PRIVATE_BASE + 0)
453
454 static struct v4l2_queryctrl* ctrl_by_id(int id)
455 {
456 int i;
457
458 for (i = 0; i < NUM_CONTROLS; i++)
459 if (controls[i].id == id)
460 return controls+i;
461 return NULL;
462 }
463
464 static int get_control(struct saa7146_fh *fh, struct v4l2_control *c)
465 {
466 struct saa7146_dev *dev = fh->dev;
467 struct saa7146_vv *vv = dev->vv_data;
468
469 const struct v4l2_queryctrl* ctrl;
470 u32 value = 0;
471
472 ctrl = ctrl_by_id(c->id);
473 if (NULL == ctrl)
474 return -EINVAL;
475 switch (c->id) {
476 case V4L2_CID_BRIGHTNESS:
477 value = saa7146_read(dev, BCS_CTRL);
478 c->value = 0xff & (value >> 24);
479 DEB_D(("V4L2_CID_BRIGHTNESS: %d\n",c->value));
480 break;
481 case V4L2_CID_CONTRAST:
482 value = saa7146_read(dev, BCS_CTRL);
483 c->value = 0x7f & (value >> 16);
484 DEB_D(("V4L2_CID_CONTRAST: %d\n",c->value));
485 break;
486 case V4L2_CID_SATURATION:
487 value = saa7146_read(dev, BCS_CTRL);
488 c->value = 0x7f & (value >> 0);
489 DEB_D(("V4L2_CID_SATURATION: %d\n",c->value));
490 break;
491 case V4L2_CID_VFLIP:
492 c->value = vv->vflip;
493 DEB_D(("V4L2_CID_VFLIP: %d\n",c->value));
494 break;
495 case V4L2_CID_HFLIP:
496 c->value = vv->hflip;
497 DEB_D(("V4L2_CID_HFLIP: %d\n",c->value));
498 break;
499 default:
500 return -EINVAL;
501 }
502
503 return 0;
504 }
505
506 static int set_control(struct saa7146_fh *fh, struct v4l2_control *c)
507 {
508 struct saa7146_dev *dev = fh->dev;
509 struct saa7146_vv *vv = dev->vv_data;
510
511 const struct v4l2_queryctrl* ctrl;
512
513 ctrl = ctrl_by_id(c->id);
514 if (NULL == ctrl) {
515 DEB_D(("unknown control %d\n",c->id));
516 return -EINVAL;
517 }
518
519 mutex_lock(&dev->lock);
520
521 switch (ctrl->type) {
522 case V4L2_CTRL_TYPE_BOOLEAN:
523 case V4L2_CTRL_TYPE_MENU:
524 case V4L2_CTRL_TYPE_INTEGER:
525 if (c->value < ctrl->minimum)
526 c->value = ctrl->minimum;
527 if (c->value > ctrl->maximum)
528 c->value = ctrl->maximum;
529 break;
530 default:
531 /* nothing */;
532 };
533
534 switch (c->id) {
535 case V4L2_CID_BRIGHTNESS: {
536 u32 value = saa7146_read(dev, BCS_CTRL);
537 value &= 0x00ffffff;
538 value |= (c->value << 24);
539 saa7146_write(dev, BCS_CTRL, value);
540 saa7146_write(dev, MC2, MASK_22 | MASK_06 );
541 break;
542 }
543 case V4L2_CID_CONTRAST: {
544 u32 value = saa7146_read(dev, BCS_CTRL);
545 value &= 0xff00ffff;
546 value |= (c->value << 16);
547 saa7146_write(dev, BCS_CTRL, value);
548 saa7146_write(dev, MC2, MASK_22 | MASK_06 );
549 break;
550 }
551 case V4L2_CID_SATURATION: {
552 u32 value = saa7146_read(dev, BCS_CTRL);
553 value &= 0xffffff00;
554 value |= (c->value << 0);
555 saa7146_write(dev, BCS_CTRL, value);
556 saa7146_write(dev, MC2, MASK_22 | MASK_06 );
557 break;
558 }
559 case V4L2_CID_HFLIP:
560 /* fixme: we can support changing VFLIP and HFLIP here... */
561 if (IS_CAPTURE_ACTIVE(fh) != 0) {
562 DEB_D(("V4L2_CID_HFLIP while active capture.\n"));
563 mutex_unlock(&dev->lock);
564 return -EINVAL;
565 }
566 vv->hflip = c->value;
567 break;
568 case V4L2_CID_VFLIP:
569 if (IS_CAPTURE_ACTIVE(fh) != 0) {
570 DEB_D(("V4L2_CID_VFLIP while active capture.\n"));
571 mutex_unlock(&dev->lock);
572 return -EINVAL;
573 }
574 vv->vflip = c->value;
575 break;
576 default: {
577 return -EINVAL;
578 }
579 }
580 mutex_unlock(&dev->lock);
581
582 if (IS_OVERLAY_ACTIVE(fh) != 0) {
583 saa7146_stop_preview(fh);
584 saa7146_start_preview(fh);
585 }
586 return 0;
587 }
588
589 /********************************************************************************/
590 /* common pagetable functions */
591
592 static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
593 {
594 struct pci_dev *pci = dev->pci;
595 struct scatterlist *list = buf->vb.dma.sglist;
596 int length = buf->vb.dma.sglen;
597 struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
598
599 DEB_EE(("dev:%p, buf:%p, sg_len:%d\n",dev,buf,length));
600
601 if( 0 != IS_PLANAR(sfmt->trans)) {
602 struct saa7146_pgtable *pt1 = &buf->pt[0];
603 struct saa7146_pgtable *pt2 = &buf->pt[1];
604 struct saa7146_pgtable *pt3 = &buf->pt[2];
605 u32 *ptr1, *ptr2, *ptr3;
606 u32 fill;
607
608 int size = buf->fmt->width*buf->fmt->height;
609 int i,p,m1,m2,m3,o1,o2;
610
611 switch( sfmt->depth ) {
612 case 12: {
613 /* create some offsets inside the page table */
614 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
615 m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
616 m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
617 o1 = size%PAGE_SIZE;
618 o2 = (size+(size/4))%PAGE_SIZE;
619 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
620 break;
621 }
622 case 16: {
623 /* create some offsets inside the page table */
624 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
625 m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
626 m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
627 o1 = size%PAGE_SIZE;
628 o2 = (size+(size/2))%PAGE_SIZE;
629 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
630 break;
631 }
632 default: {
633 return -1;
634 }
635 }
636
637 ptr1 = pt1->cpu;
638 ptr2 = pt2->cpu;
639 ptr3 = pt3->cpu;
640
641 /* walk all pages, copy all page addresses to ptr1 */
642 for (i = 0; i < length; i++, list++) {
643 for (p = 0; p * 4096 < list->length; p++, ptr1++) {
644 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
645 }
646 }
647 /*
648 ptr1 = pt1->cpu;
649 for(j=0;j<40;j++) {
650 printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
651 }
652 */
653
654 /* if we have a user buffer, the first page may not be
655 aligned to a page boundary. */
656 pt1->offset = buf->vb.dma.sglist->offset;
657 pt2->offset = pt1->offset+o1;
658 pt3->offset = pt1->offset+o2;
659
660 /* create video-dma2 page table */
661 ptr1 = pt1->cpu;
662 for(i = m1; i <= m2 ; i++, ptr2++) {
663 *ptr2 = ptr1[i];
664 }
665 fill = *(ptr2-1);
666 for(;i<1024;i++,ptr2++) {
667 *ptr2 = fill;
668 }
669 /* create video-dma3 page table */
670 ptr1 = pt1->cpu;
671 for(i = m2; i <= m3; i++,ptr3++) {
672 *ptr3 = ptr1[i];
673 }
674 fill = *(ptr3-1);
675 for(;i<1024;i++,ptr3++) {
676 *ptr3 = fill;
677 }
678 /* finally: finish up video-dma1 page table */
679 ptr1 = pt1->cpu+m1;
680 fill = pt1->cpu[m1];
681 for(i=m1;i<1024;i++,ptr1++) {
682 *ptr1 = fill;
683 }
684 /*
685 ptr1 = pt1->cpu;
686 ptr2 = pt2->cpu;
687 ptr3 = pt3->cpu;
688 for(j=0;j<40;j++) {
689 printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
690 }
691 for(j=0;j<40;j++) {
692 printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
693 }
694 for(j=0;j<40;j++) {
695 printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
696 }
697 */
698 } else {
699 struct saa7146_pgtable *pt = &buf->pt[0];
700 return saa7146_pgtable_build_single(pci, pt, list, length);
701 }
702
703 return 0;
704 }
705
706
707 /********************************************************************************/
708 /* file operations */
709
710 static int video_begin(struct saa7146_fh *fh)
711 {
712 struct saa7146_dev *dev = fh->dev;
713 struct saa7146_vv *vv = dev->vv_data;
714 struct saa7146_format *fmt = NULL;
715 unsigned int resource;
716 int ret = 0, err = 0;
717
718 DEB_EE(("dev:%p, fh:%p\n",dev,fh));
719
720 if ((vv->video_status & STATUS_CAPTURE) != 0) {
721 if (vv->video_fh == fh) {
722 DEB_S(("already capturing.\n"));
723 return 0;
724 }
725 DEB_S(("already capturing in another open.\n"));
726 return -EBUSY;
727 }
728
729 if ((vv->video_status & STATUS_OVERLAY) != 0) {
730 DEB_S(("warning: suspending overlay video for streaming capture.\n"));
731 vv->ov_suspend = vv->video_fh;
732 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
733 if (0 != err) {
734 DEB_D(("suspending video failed. aborting\n"));
735 return err;
736 }
737 }
738
739 fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
740 /* we need to have a valid format set here */
741 BUG_ON(NULL == fmt);
742
743 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
744 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
745 } else {
746 resource = RESOURCE_DMA1_HPS;
747 }
748
749 ret = saa7146_res_get(fh, resource);
750 if (0 == ret) {
751 DEB_S(("cannot get capture resource %d\n",resource));
752 if (vv->ov_suspend != NULL) {
753 saa7146_start_preview(vv->ov_suspend);
754 vv->ov_suspend = NULL;
755 }
756 return -EBUSY;
757 }
758
759 /* clear out beginning of streaming bit (rps register 0)*/
760 saa7146_write(dev, MC2, MASK_27 );
761
762 /* enable rps0 irqs */
763 SAA7146_IER_ENABLE(dev, MASK_27);
764
765 vv->video_fh = fh;
766 vv->video_status = STATUS_CAPTURE;
767
768 return 0;
769 }
770
771 static int video_end(struct saa7146_fh *fh, struct file *file)
772 {
773 struct saa7146_dev *dev = fh->dev;
774 struct saa7146_vv *vv = dev->vv_data;
775 struct saa7146_format *fmt = NULL;
776 unsigned long flags;
777 unsigned int resource;
778 u32 dmas = 0;
779 DEB_EE(("dev:%p, fh:%p\n",dev,fh));
780
781 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
782 DEB_S(("not capturing.\n"));
783 return 0;
784 }
785
786 if (vv->video_fh != fh) {
787 DEB_S(("capturing, but in another open.\n"));
788 return -EBUSY;
789 }
790
791 fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
792 /* we need to have a valid format set here */
793 BUG_ON(NULL == fmt);
794
795 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
796 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
797 dmas = MASK_22 | MASK_21 | MASK_20;
798 } else {
799 resource = RESOURCE_DMA1_HPS;
800 dmas = MASK_22;
801 }
802 spin_lock_irqsave(&dev->slock,flags);
803
804 /* disable rps0 */
805 saa7146_write(dev, MC1, MASK_28);
806
807 /* disable rps0 irqs */
808 SAA7146_IER_DISABLE(dev, MASK_27);
809
810 /* shut down all used video dma transfers */
811 saa7146_write(dev, MC1, dmas);
812
813 spin_unlock_irqrestore(&dev->slock, flags);
814
815 vv->video_fh = NULL;
816 vv->video_status = 0;
817
818 saa7146_res_free(fh, resource);
819
820 if (vv->ov_suspend != NULL) {
821 saa7146_start_preview(vv->ov_suspend);
822 vv->ov_suspend = NULL;
823 }
824
825 return 0;
826 }
827
828 /*
829 * This function is _not_ called directly, but from
830 * video_generic_ioctl (and maybe others). userspace
831 * copying is done already, arg is a kernel pointer.
832 */
833
834 int saa7146_video_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg)
835 {
836 struct saa7146_fh *fh = file->private_data;
837 struct saa7146_dev *dev = fh->dev;
838 struct saa7146_vv *vv = dev->vv_data;
839
840 int err = 0, result = 0, ee = 0;
841
842 struct saa7146_use_ops *ops;
843 struct videobuf_queue *q;
844
845 /* check if extension handles the command */
846 for(ee = 0; dev->ext_vv_data->ioctls[ee].flags != 0; ee++) {
847 if( cmd == dev->ext_vv_data->ioctls[ee].cmd )
848 break;
849 }
850
851 if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_EXCLUSIVE) ) {
852 DEB_D(("extension handles ioctl exclusive.\n"));
853 result = dev->ext_vv_data->ioctl(fh, cmd, arg);
854 return result;
855 }
856 if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_BEFORE) ) {
857 DEB_D(("extension handles ioctl before.\n"));
858 result = dev->ext_vv_data->ioctl(fh, cmd, arg);
859 if( -EAGAIN != result ) {
860 return result;
861 }
862 }
863
864 /* fixme: add handle "after" case (is it still needed?) */
865
866 switch (fh->type) {
867 case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
868 ops = &saa7146_video_uops;
869 q = &fh->video_q;
870 break;
871 }
872 case V4L2_BUF_TYPE_VBI_CAPTURE: {
873 ops = &saa7146_vbi_uops;
874 q = &fh->vbi_q;
875 break;
876 }
877 default:
878 BUG();
879 return 0;
880 }
881
882 switch (cmd) {
883 case VIDIOC_QUERYCAP:
884 {
885 struct v4l2_capability *cap = arg;
886 memset(cap,0,sizeof(*cap));
887
888 DEB_EE(("VIDIOC_QUERYCAP\n"));
889
890 strcpy(cap->driver, "saa7146 v4l2");
891 strlcpy(cap->card, dev->ext->name, sizeof(cap->card));
892 sprintf(cap->bus_info,"PCI:%s", pci_name(dev->pci));
893 cap->version = SAA7146_VERSION_CODE;
894 cap->capabilities =
895 V4L2_CAP_VIDEO_CAPTURE |
896 V4L2_CAP_VIDEO_OVERLAY |
897 V4L2_CAP_READWRITE |
898 V4L2_CAP_STREAMING;
899 cap->capabilities |= dev->ext_vv_data->capabilities;
900 return 0;
901 }
902 case VIDIOC_G_FBUF:
903 {
904 struct v4l2_framebuffer *fb = arg;
905
906 DEB_EE(("VIDIOC_G_FBUF\n"));
907
908 *fb = vv->ov_fb;
909 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
910 return 0;
911 }
912 case VIDIOC_S_FBUF:
913 {
914 struct v4l2_framebuffer *fb = arg;
915 struct saa7146_format *fmt;
916
917 DEB_EE(("VIDIOC_S_FBUF\n"));
918
919 if(!capable(CAP_SYS_ADMIN) &&
920 !capable(CAP_SYS_RAWIO))
921 return -EPERM;
922
923 /* check args */
924 fmt = format_by_fourcc(dev,fb->fmt.pixelformat);
925 if (NULL == fmt) {
926 return -EINVAL;
927 }
928
929 /* planar formats are not allowed for overlay video, clipping and video dma would clash */
930 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
931 DEB_S(("planar pixelformat '%4.4s' not allowed for overlay\n",(char *)&fmt->pixelformat));
932 }
933
934 /* check if overlay is running */
935 if (IS_OVERLAY_ACTIVE(fh) != 0) {
936 if (vv->video_fh != fh) {
937 DEB_D(("refusing to change framebuffer informations while overlay is active in another open.\n"));
938 return -EBUSY;
939 }
940 }
941
942 mutex_lock(&dev->lock);
943
944 /* ok, accept it */
945 vv->ov_fb = *fb;
946 vv->ov_fmt = fmt;
947 if (0 == vv->ov_fb.fmt.bytesperline)
948 vv->ov_fb.fmt.bytesperline =
949 vv->ov_fb.fmt.width*fmt->depth/8;
950
951 mutex_unlock(&dev->lock);
952
953 return 0;
954 }
955 case VIDIOC_ENUM_FMT:
956 {
957 struct v4l2_fmtdesc *f = arg;
958 int index;
959
960 switch (f->type) {
961 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
962 case V4L2_BUF_TYPE_VIDEO_OVERLAY: {
963 index = f->index;
964 if (index < 0 || index >= NUM_FORMATS) {
965 return -EINVAL;
966 }
967 memset(f,0,sizeof(*f));
968 f->index = index;
969 strlcpy(f->description,formats[index].name,sizeof(f->description));
970 f->pixelformat = formats[index].pixelformat;
971 break;
972 }
973 default:
974 return -EINVAL;
975 }
976
977 DEB_EE(("VIDIOC_ENUM_FMT: type:%d, index:%d\n",f->type,f->index));
978 return 0;
979 }
980 case VIDIOC_QUERYCTRL:
981 {
982 const struct v4l2_queryctrl *ctrl;
983 struct v4l2_queryctrl *c = arg;
984
985 if ((c->id < V4L2_CID_BASE ||
986 c->id >= V4L2_CID_LASTP1) &&
987 (c->id < V4L2_CID_PRIVATE_BASE ||
988 c->id >= V4L2_CID_PRIVATE_LASTP1))
989 return -EINVAL;
990
991 ctrl = ctrl_by_id(c->id);
992 if( NULL == ctrl ) {
993 return -EINVAL;
994 /*
995 c->flags = V4L2_CTRL_FLAG_DISABLED;
996 return 0;
997 */
998 }
999
1000 DEB_EE(("VIDIOC_QUERYCTRL: id:%d\n",c->id));
1001 *c = *ctrl;
1002 return 0;
1003 }
1004 case VIDIOC_G_CTRL: {
1005 DEB_EE(("VIDIOC_G_CTRL\n"));
1006 return get_control(fh,arg);
1007 }
1008 case VIDIOC_S_CTRL:
1009 {
1010 DEB_EE(("VIDIOC_S_CTRL\n"));
1011 err = set_control(fh,arg);
1012 return err;
1013 }
1014 case VIDIOC_G_PARM:
1015 {
1016 struct v4l2_streamparm *parm = arg;
1017 if( parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ) {
1018 return -EINVAL;
1019 }
1020 memset(&parm->parm.capture,0,sizeof(struct v4l2_captureparm));
1021 parm->parm.capture.readbuffers = 1;
1022 // fixme: only for PAL!
1023 parm->parm.capture.timeperframe.numerator = 1;
1024 parm->parm.capture.timeperframe.denominator = 25;
1025 return 0;
1026 }
1027 case VIDIOC_G_FMT:
1028 {
1029 struct v4l2_format *f = arg;
1030 DEB_EE(("VIDIOC_G_FMT\n"));
1031 return g_fmt(fh,f);
1032 }
1033 case VIDIOC_S_FMT:
1034 {
1035 struct v4l2_format *f = arg;
1036 DEB_EE(("VIDIOC_S_FMT\n"));
1037 return s_fmt(fh,f);
1038 }
1039 case VIDIOC_TRY_FMT:
1040 {
1041 struct v4l2_format *f = arg;
1042 DEB_EE(("VIDIOC_TRY_FMT\n"));
1043 return try_fmt(fh,f);
1044 }
1045 case VIDIOC_G_STD:
1046 {
1047 v4l2_std_id *id = arg;
1048 DEB_EE(("VIDIOC_G_STD\n"));
1049 *id = vv->standard->id;
1050 return 0;
1051 }
1052 /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
1053 PAL / NTSC / SECAM. if your hardware does not (or does more)
1054 -- override this function in your extension */
1055 case VIDIOC_ENUMSTD:
1056 {
1057 struct v4l2_standard *e = arg;
1058 if (e->index < 0 )
1059 return -EINVAL;
1060 if( e->index < dev->ext_vv_data->num_stds ) {
1061 DEB_EE(("VIDIOC_ENUMSTD: index:%d\n",e->index));
1062 v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
1063 return 0;
1064 }
1065 return -EINVAL;
1066 }
1067 case VIDIOC_S_STD:
1068 {
1069 v4l2_std_id *id = arg;
1070 int found = 0;
1071 int i, err;
1072
1073 DEB_EE(("VIDIOC_S_STD\n"));
1074
1075 if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
1076 DEB_D(("cannot change video standard while streaming capture is active\n"));
1077 return -EBUSY;
1078 }
1079
1080 if ((vv->video_status & STATUS_OVERLAY) != 0) {
1081 vv->ov_suspend = vv->video_fh;
1082 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
1083 if (0 != err) {
1084 DEB_D(("suspending video failed. aborting\n"));
1085 return err;
1086 }
1087 }
1088
1089 mutex_lock(&dev->lock);
1090
1091 for(i = 0; i < dev->ext_vv_data->num_stds; i++)
1092 if (*id & dev->ext_vv_data->stds[i].id)
1093 break;
1094 if (i != dev->ext_vv_data->num_stds) {
1095 vv->standard = &dev->ext_vv_data->stds[i];
1096 if( NULL != dev->ext_vv_data->std_callback )
1097 dev->ext_vv_data->std_callback(dev, vv->standard);
1098 found = 1;
1099 }
1100
1101 mutex_unlock(&dev->lock);
1102
1103 if (vv->ov_suspend != NULL) {
1104 saa7146_start_preview(vv->ov_suspend);
1105 vv->ov_suspend = NULL;
1106 }
1107
1108 if( 0 == found ) {
1109 DEB_EE(("VIDIOC_S_STD: standard not found.\n"));
1110 return -EINVAL;
1111 }
1112
1113 DEB_EE(("VIDIOC_S_STD: set to standard to '%s'\n",vv->standard->name));
1114 return 0;
1115 }
1116 case VIDIOC_OVERLAY:
1117 {
1118 int on = *(int *)arg;
1119 int err = 0;
1120
1121 DEB_D(("VIDIOC_OVERLAY on:%d\n",on));
1122 if (on != 0) {
1123 err = saa7146_start_preview(fh);
1124 } else {
1125 err = saa7146_stop_preview(fh);
1126 }
1127 return err;
1128 }
1129 case VIDIOC_REQBUFS: {
1130 struct v4l2_requestbuffers *req = arg;
1131 DEB_D(("VIDIOC_REQBUFS, type:%d\n",req->type));
1132 return videobuf_reqbufs(q,req);
1133 }
1134 case VIDIOC_QUERYBUF: {
1135 struct v4l2_buffer *buf = arg;
1136 DEB_D(("VIDIOC_QUERYBUF, type:%d, offset:%d\n",buf->type,buf->m.offset));
1137 return videobuf_querybuf(q,buf);
1138 }
1139 case VIDIOC_QBUF: {
1140 struct v4l2_buffer *buf = arg;
1141 int ret = 0;
1142 ret = videobuf_qbuf(q,buf);
1143 DEB_D(("VIDIOC_QBUF: ret:%d, index:%d\n",ret,buf->index));
1144 return ret;
1145 }
1146 case VIDIOC_DQBUF: {
1147 struct v4l2_buffer *buf = arg;
1148 int ret = 0;
1149 ret = videobuf_dqbuf(q,buf,file->f_flags & O_NONBLOCK);
1150 DEB_D(("VIDIOC_DQBUF: ret:%d, index:%d\n",ret,buf->index));
1151 return ret;
1152 }
1153 case VIDIOC_STREAMON: {
1154 int *type = arg;
1155 DEB_D(("VIDIOC_STREAMON, type:%d\n",*type));
1156
1157 err = video_begin(fh);
1158 if( 0 != err) {
1159 return err;
1160 }
1161 err = videobuf_streamon(q);
1162 return err;
1163 }
1164 case VIDIOC_STREAMOFF: {
1165 int *type = arg;
1166
1167 DEB_D(("VIDIOC_STREAMOFF, type:%d\n",*type));
1168
1169 /* ugly: we need to copy some checks from video_end(),
1170 because videobuf_streamoff() relies on the capture running.
1171 check and fix this */
1172 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
1173 DEB_S(("not capturing.\n"));
1174 return 0;
1175 }
1176
1177 if (vv->video_fh != fh) {
1178 DEB_S(("capturing, but in another open.\n"));
1179 return -EBUSY;
1180 }
1181
1182 err = videobuf_streamoff(q);
1183 if (0 != err) {
1184 DEB_D(("warning: videobuf_streamoff() failed.\n"));
1185 video_end(fh, file);
1186 } else {
1187 err = video_end(fh, file);
1188 }
1189 return err;
1190 }
1191 case VIDIOCGMBUF:
1192 {
1193 struct video_mbuf *mbuf = arg;
1194 struct videobuf_queue *q;
1195 int i;
1196
1197 /* fixme: number of capture buffers and sizes for v4l apps */
1198 int gbuffers = 2;
1199 int gbufsize = 768*576*4;
1200
1201 DEB_D(("VIDIOCGMBUF \n"));
1202
1203 q = &fh->video_q;
1204 mutex_lock(&q->lock);
1205 err = videobuf_mmap_setup(q,gbuffers,gbufsize,
1206 V4L2_MEMORY_MMAP);
1207 if (err < 0) {
1208 mutex_unlock(&q->lock);
1209 return err;
1210 }
1211 memset(mbuf,0,sizeof(*mbuf));
1212 mbuf->frames = gbuffers;
1213 mbuf->size = gbuffers * gbufsize;
1214 for (i = 0; i < gbuffers; i++)
1215 mbuf->offsets[i] = i * gbufsize;
1216 mutex_unlock(&q->lock);
1217 return 0;
1218 }
1219 default:
1220 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
1221 saa7146_video_do_ioctl);
1222 }
1223 return 0;
1224 }
1225
1226 /*********************************************************************************/
1227 /* buffer handling functions */
1228
1229 static int buffer_activate (struct saa7146_dev *dev,
1230 struct saa7146_buf *buf,
1231 struct saa7146_buf *next)
1232 {
1233 struct saa7146_vv *vv = dev->vv_data;
1234
1235 buf->vb.state = STATE_ACTIVE;
1236 saa7146_set_capture(dev,buf,next);
1237
1238 mod_timer(&vv->video_q.timeout, jiffies+BUFFER_TIMEOUT);
1239 return 0;
1240 }
1241
1242 static int buffer_prepare(struct videobuf_queue *q,
1243 struct videobuf_buffer *vb, enum v4l2_field field)
1244 {
1245 struct file *file = q->priv_data;
1246 struct saa7146_fh *fh = file->private_data;
1247 struct saa7146_dev *dev = fh->dev;
1248 struct saa7146_vv *vv = dev->vv_data;
1249 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1250 int size,err = 0;
1251
1252 DEB_CAP(("vbuf:%p\n",vb));
1253
1254 /* sanity checks */
1255 if (fh->video_fmt.width < 48 ||
1256 fh->video_fmt.height < 32 ||
1257 fh->video_fmt.width > vv->standard->h_max_out ||
1258 fh->video_fmt.height > vv->standard->v_max_out) {
1259 DEB_D(("w (%d) / h (%d) out of bounds.\n",fh->video_fmt.width,fh->video_fmt.height));
1260 return -EINVAL;
1261 }
1262
1263 size = fh->video_fmt.sizeimage;
1264 if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1265 DEB_D(("size mismatch.\n"));
1266 return -EINVAL;
1267 }
1268
1269 DEB_CAP(("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1270 fh->video_fmt.width,fh->video_fmt.height,size,v4l2_field_names[fh->video_fmt.field]));
1271 if (buf->vb.width != fh->video_fmt.width ||
1272 buf->vb.bytesperline != fh->video_fmt.bytesperline ||
1273 buf->vb.height != fh->video_fmt.height ||
1274 buf->vb.size != size ||
1275 buf->vb.field != field ||
1276 buf->vb.field != fh->video_fmt.field ||
1277 buf->fmt != &fh->video_fmt) {
1278 saa7146_dma_free(dev,q,buf);
1279 }
1280
1281 if (STATE_NEEDS_INIT == buf->vb.state) {
1282 struct saa7146_format *sfmt;
1283
1284 buf->vb.bytesperline = fh->video_fmt.bytesperline;
1285 buf->vb.width = fh->video_fmt.width;
1286 buf->vb.height = fh->video_fmt.height;
1287 buf->vb.size = size;
1288 buf->vb.field = field;
1289 buf->fmt = &fh->video_fmt;
1290 buf->vb.field = fh->video_fmt.field;
1291
1292 sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
1293
1294 if( 0 != IS_PLANAR(sfmt->trans)) {
1295 saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1296 saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1297 saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1298
1299 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1300 saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1301 saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1302 } else {
1303 saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1304 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1305 }
1306
1307 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1308 if (err)
1309 goto oops;
1310 err = saa7146_pgtable_build(dev,buf);
1311 if (err)
1312 goto oops;
1313 }
1314 buf->vb.state = STATE_PREPARED;
1315 buf->activate = buffer_activate;
1316
1317 return 0;
1318
1319 oops:
1320 DEB_D(("error out.\n"));
1321 saa7146_dma_free(dev,q,buf);
1322
1323 return err;
1324 }
1325
1326 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1327 {
1328 struct file *file = q->priv_data;
1329 struct saa7146_fh *fh = file->private_data;
1330
1331 if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1332 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1333
1334 *size = fh->video_fmt.sizeimage;
1335
1336 /* check if we exceed the "max_memory" parameter */
1337 if( (*count * *size) > (max_memory*1048576) ) {
1338 *count = (max_memory*1048576) / *size;
1339 }
1340
1341 DEB_CAP(("%d buffers, %d bytes each.\n",*count,*size));
1342
1343 return 0;
1344 }
1345
1346 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1347 {
1348 struct file *file = q->priv_data;
1349 struct saa7146_fh *fh = file->private_data;
1350 struct saa7146_dev *dev = fh->dev;
1351 struct saa7146_vv *vv = dev->vv_data;
1352 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1353
1354 DEB_CAP(("vbuf:%p\n",vb));
1355 saa7146_buffer_queue(fh->dev,&vv->video_q,buf);
1356 }
1357
1358 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1359 {
1360 struct file *file = q->priv_data;
1361 struct saa7146_fh *fh = file->private_data;
1362 struct saa7146_dev *dev = fh->dev;
1363 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1364
1365 DEB_CAP(("vbuf:%p\n",vb));
1366 saa7146_dma_free(dev,q,buf);
1367 }
1368
1369 static struct videobuf_queue_ops video_qops = {
1370 .buf_setup = buffer_setup,
1371 .buf_prepare = buffer_prepare,
1372 .buf_queue = buffer_queue,
1373 .buf_release = buffer_release,
1374 };
1375
1376 /********************************************************************************/
1377 /* file operations */
1378
1379 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1380 {
1381 INIT_LIST_HEAD(&vv->video_q.queue);
1382
1383 init_timer(&vv->video_q.timeout);
1384 vv->video_q.timeout.function = saa7146_buffer_timeout;
1385 vv->video_q.timeout.data = (unsigned long)(&vv->video_q);
1386 vv->video_q.dev = dev;
1387
1388 /* set some default values */
1389 vv->standard = &dev->ext_vv_data->stds[0];
1390
1391 /* FIXME: what's this? */
1392 vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1393 vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1394 }
1395
1396
1397 static int video_open(struct saa7146_dev *dev, struct file *file)
1398 {
1399 struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1400 struct saa7146_format *sfmt;
1401
1402 fh->video_fmt.width = 384;
1403 fh->video_fmt.height = 288;
1404 fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24;
1405 fh->video_fmt.bytesperline = 0;
1406 fh->video_fmt.field = V4L2_FIELD_ANY;
1407 sfmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
1408 fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8;
1409
1410 videobuf_queue_init(&fh->video_q, &video_qops,
1411 dev->pci, &dev->slock,
1412 V4L2_BUF_TYPE_VIDEO_CAPTURE,
1413 V4L2_FIELD_INTERLACED,
1414 sizeof(struct saa7146_buf),
1415 file);
1416
1417 mutex_init(&fh->video_q.lock);
1418
1419 return 0;
1420 }
1421
1422
1423 static void video_close(struct saa7146_dev *dev, struct file *file)
1424 {
1425 struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1426 struct saa7146_vv *vv = dev->vv_data;
1427 int err;
1428
1429 if (IS_CAPTURE_ACTIVE(fh) != 0) {
1430 err = video_end(fh, file);
1431 } else if (IS_OVERLAY_ACTIVE(fh) != 0) {
1432 err = saa7146_stop_preview(fh);
1433 }
1434
1435 /* hmm, why is this function declared void? */
1436 /* return err */
1437 }
1438
1439
1440 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1441 {
1442 struct saa7146_vv *vv = dev->vv_data;
1443 struct saa7146_dmaqueue *q = &vv->video_q;
1444
1445 spin_lock(&dev->slock);
1446 DEB_CAP(("called.\n"));
1447
1448 /* only finish the buffer if we have one... */
1449 if( NULL != q->curr ) {
1450 saa7146_buffer_finish(dev,q,STATE_DONE);
1451 }
1452 saa7146_buffer_next(dev,q,0);
1453
1454 spin_unlock(&dev->slock);
1455 }
1456
1457 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1458 {
1459 struct saa7146_fh *fh = file->private_data;
1460 struct saa7146_dev *dev = fh->dev;
1461 struct saa7146_vv *vv = dev->vv_data;
1462 ssize_t ret = 0;
1463
1464 DEB_EE(("called.\n"));
1465
1466 if ((vv->video_status & STATUS_CAPTURE) != 0) {
1467 /* fixme: should we allow read() captures while streaming capture? */
1468 if (vv->video_fh == fh) {
1469 DEB_S(("already capturing.\n"));
1470 return -EBUSY;
1471 }
1472 DEB_S(("already capturing in another open.\n"));
1473 return -EBUSY;
1474 }
1475
1476 ret = video_begin(fh);
1477 if( 0 != ret) {
1478 goto out;
1479 }
1480
1481 ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1482 file->f_flags & O_NONBLOCK);
1483 if (ret != 0) {
1484 video_end(fh, file);
1485 } else {
1486 ret = video_end(fh, file);
1487 }
1488 out:
1489 /* restart overlay if it was active before */
1490 if (vv->ov_suspend != NULL) {
1491 saa7146_start_preview(vv->ov_suspend);
1492 vv->ov_suspend = NULL;
1493 }
1494
1495 return ret;
1496 }
1497
1498 struct saa7146_use_ops saa7146_video_uops = {
1499 .init = video_init,
1500 .open = video_open,
1501 .release = video_close,
1502 .irq_done = video_irq_done,
1503 .read = video_read,
1504 };
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