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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / media / common / saa7146_video.c
blob66fdbd0e6a6ddfe5ad7f5a6a72045e574db95d56
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 EXPORT_SYMBOL_GPL(saa7146_start_preview);
322
323 int saa7146_stop_preview(struct saa7146_fh *fh)
324 {
325 struct saa7146_dev *dev = fh->dev;
326 struct saa7146_vv *vv = dev->vv_data;
327
328 DEB_EE(("dev:%p, fh:%p\n",dev,fh));
329
330 /* check if streaming capture is running */
331 if (IS_CAPTURE_ACTIVE(fh) != 0) {
332 DEB_D(("streaming capture is active.\n"));
333 return -EBUSY;
334 }
335
336 /* check if overlay is running at all */
337 if ((vv->video_status & STATUS_OVERLAY) == 0) {
338 DEB_D(("no active overlay.\n"));
339 return 0;
340 }
341
342 if (vv->video_fh != fh) {
343 DEB_D(("overlay is active, but in another open.\n"));
344 return -EBUSY;
345 }
346
347 vv->video_status = 0;
348 vv->video_fh = NULL;
349
350 saa7146_disable_overlay(fh);
351
352 saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
353
354 return 0;
355 }
356 EXPORT_SYMBOL_GPL(saa7146_stop_preview);
357
358 static int s_fmt(struct saa7146_fh *fh, struct v4l2_format *f)
359 {
360 struct saa7146_dev *dev = fh->dev;
361 struct saa7146_vv *vv = dev->vv_data;
362
363 int err;
364
365 switch (f->type) {
366 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
367 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n",dev,fh));
368 if (IS_CAPTURE_ACTIVE(fh) != 0) {
369 DEB_EE(("streaming capture is active\n"));
370 return -EBUSY;
371 }
372 err = try_fmt(fh,f);
373 if (0 != err)
374 return err;
375 fh->video_fmt = f->fmt.pix;
376 DEB_EE(("set to pixelformat '%4.4s'\n",(char *)&fh->video_fmt.pixelformat));
377 return 0;
378 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
379 DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n",dev,fh));
380 err = try_win(dev,&f->fmt.win);
381 if (0 != err)
382 return err;
383 mutex_lock(&dev->lock);
384 fh->ov.win = f->fmt.win;
385 fh->ov.nclips = f->fmt.win.clipcount;
386 if (fh->ov.nclips > 16)
387 fh->ov.nclips = 16;
388 if (copy_from_user(fh->ov.clips,f->fmt.win.clips,sizeof(struct v4l2_clip)*fh->ov.nclips)) {
389 mutex_unlock(&dev->lock);
390 return -EFAULT;
391 }
392
393 /* fh->ov.fh is used to indicate that we have valid overlay informations, too */
394 fh->ov.fh = fh;
395
396 mutex_unlock(&dev->lock);
397
398 /* check if our current overlay is active */
399 if (IS_OVERLAY_ACTIVE(fh) != 0) {
400 saa7146_stop_preview(fh);
401 saa7146_start_preview(fh);
402 }
403 return 0;
404 default:
405 DEB_D(("unknown format type '%d'\n",f->type));
406 return -EINVAL;
407 }
408 }
409
410 /********************************************************************************/
411 /* device controls */
412
413 static struct v4l2_queryctrl controls[] = {
414 {
415 .id = V4L2_CID_BRIGHTNESS,
416 .name = "Brightness",
417 .minimum = 0,
418 .maximum = 255,
419 .step = 1,
420 .default_value = 128,
421 .type = V4L2_CTRL_TYPE_INTEGER,
422 },{
423 .id = V4L2_CID_CONTRAST,
424 .name = "Contrast",
425 .minimum = 0,
426 .maximum = 127,
427 .step = 1,
428 .default_value = 64,
429 .type = V4L2_CTRL_TYPE_INTEGER,
430 },{
431 .id = V4L2_CID_SATURATION,
432 .name = "Saturation",
433 .minimum = 0,
434 .maximum = 127,
435 .step = 1,
436 .default_value = 64,
437 .type = V4L2_CTRL_TYPE_INTEGER,
438 },{
439 .id = V4L2_CID_VFLIP,
440 .name = "Vertical flip",
441 .minimum = 0,
442 .maximum = 1,
443 .type = V4L2_CTRL_TYPE_BOOLEAN,
444 },{
445 .id = V4L2_CID_HFLIP,
446 .name = "Horizontal flip",
447 .minimum = 0,
448 .maximum = 1,
449 .type = V4L2_CTRL_TYPE_BOOLEAN,
450 },
451 };
452 static int NUM_CONTROLS = sizeof(controls)/sizeof(struct v4l2_queryctrl);
453
454 #define V4L2_CID_PRIVATE_LASTP1 (V4L2_CID_PRIVATE_BASE + 0)
455
456 static struct v4l2_queryctrl* ctrl_by_id(int id)
457 {
458 int i;
459
460 for (i = 0; i < NUM_CONTROLS; i++)
461 if (controls[i].id == id)
462 return controls+i;
463 return NULL;
464 }
465
466 static int get_control(struct saa7146_fh *fh, struct v4l2_control *c)
467 {
468 struct saa7146_dev *dev = fh->dev;
469 struct saa7146_vv *vv = dev->vv_data;
470
471 const struct v4l2_queryctrl* ctrl;
472 u32 value = 0;
473
474 ctrl = ctrl_by_id(c->id);
475 if (NULL == ctrl)
476 return -EINVAL;
477 switch (c->id) {
478 case V4L2_CID_BRIGHTNESS:
479 value = saa7146_read(dev, BCS_CTRL);
480 c->value = 0xff & (value >> 24);
481 DEB_D(("V4L2_CID_BRIGHTNESS: %d\n",c->value));
482 break;
483 case V4L2_CID_CONTRAST:
484 value = saa7146_read(dev, BCS_CTRL);
485 c->value = 0x7f & (value >> 16);
486 DEB_D(("V4L2_CID_CONTRAST: %d\n",c->value));
487 break;
488 case V4L2_CID_SATURATION:
489 value = saa7146_read(dev, BCS_CTRL);
490 c->value = 0x7f & (value >> 0);
491 DEB_D(("V4L2_CID_SATURATION: %d\n",c->value));
492 break;
493 case V4L2_CID_VFLIP:
494 c->value = vv->vflip;
495 DEB_D(("V4L2_CID_VFLIP: %d\n",c->value));
496 break;
497 case V4L2_CID_HFLIP:
498 c->value = vv->hflip;
499 DEB_D(("V4L2_CID_HFLIP: %d\n",c->value));
500 break;
501 default:
502 return -EINVAL;
503 }
504
505 return 0;
506 }
507
508 static int set_control(struct saa7146_fh *fh, struct v4l2_control *c)
509 {
510 struct saa7146_dev *dev = fh->dev;
511 struct saa7146_vv *vv = dev->vv_data;
512
513 const struct v4l2_queryctrl* ctrl;
514
515 ctrl = ctrl_by_id(c->id);
516 if (NULL == ctrl) {
517 DEB_D(("unknown control %d\n",c->id));
518 return -EINVAL;
519 }
520
521 mutex_lock(&dev->lock);
522
523 switch (ctrl->type) {
524 case V4L2_CTRL_TYPE_BOOLEAN:
525 case V4L2_CTRL_TYPE_MENU:
526 case V4L2_CTRL_TYPE_INTEGER:
527 if (c->value < ctrl->minimum)
528 c->value = ctrl->minimum;
529 if (c->value > ctrl->maximum)
530 c->value = ctrl->maximum;
531 break;
532 default:
533 /* nothing */;
534 };
535
536 switch (c->id) {
537 case V4L2_CID_BRIGHTNESS: {
538 u32 value = saa7146_read(dev, BCS_CTRL);
539 value &= 0x00ffffff;
540 value |= (c->value << 24);
541 saa7146_write(dev, BCS_CTRL, value);
542 saa7146_write(dev, MC2, MASK_22 | MASK_06 );
543 break;
544 }
545 case V4L2_CID_CONTRAST: {
546 u32 value = saa7146_read(dev, BCS_CTRL);
547 value &= 0xff00ffff;
548 value |= (c->value << 16);
549 saa7146_write(dev, BCS_CTRL, value);
550 saa7146_write(dev, MC2, MASK_22 | MASK_06 );
551 break;
552 }
553 case V4L2_CID_SATURATION: {
554 u32 value = saa7146_read(dev, BCS_CTRL);
555 value &= 0xffffff00;
556 value |= (c->value << 0);
557 saa7146_write(dev, BCS_CTRL, value);
558 saa7146_write(dev, MC2, MASK_22 | MASK_06 );
559 break;
560 }
561 case V4L2_CID_HFLIP:
562 /* fixme: we can support changing VFLIP and HFLIP here... */
563 if (IS_CAPTURE_ACTIVE(fh) != 0) {
564 DEB_D(("V4L2_CID_HFLIP while active capture.\n"));
565 mutex_unlock(&dev->lock);
566 return -EINVAL;
567 }
568 vv->hflip = c->value;
569 break;
570 case V4L2_CID_VFLIP:
571 if (IS_CAPTURE_ACTIVE(fh) != 0) {
572 DEB_D(("V4L2_CID_VFLIP while active capture.\n"));
573 mutex_unlock(&dev->lock);
574 return -EINVAL;
575 }
576 vv->vflip = c->value;
577 break;
578 default: {
579 return -EINVAL;
580 }
581 }
582 mutex_unlock(&dev->lock);
583
584 if (IS_OVERLAY_ACTIVE(fh) != 0) {
585 saa7146_stop_preview(fh);
586 saa7146_start_preview(fh);
587 }
588 return 0;
589 }
590
591 /********************************************************************************/
592 /* common pagetable functions */
593
594 static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
595 {
596 struct pci_dev *pci = dev->pci;
597 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
598 struct scatterlist *list = dma->sglist;
599 int length = dma->sglen;
600 struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
601
602 DEB_EE(("dev:%p, buf:%p, sg_len:%d\n",dev,buf,length));
603
604 if( 0 != IS_PLANAR(sfmt->trans)) {
605 struct saa7146_pgtable *pt1 = &buf->pt[0];
606 struct saa7146_pgtable *pt2 = &buf->pt[1];
607 struct saa7146_pgtable *pt3 = &buf->pt[2];
608 u32 *ptr1, *ptr2, *ptr3;
609 u32 fill;
610
611 int size = buf->fmt->width*buf->fmt->height;
612 int i,p,m1,m2,m3,o1,o2;
613
614 switch( sfmt->depth ) {
615 case 12: {
616 /* create some offsets inside the page table */
617 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
618 m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
619 m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
620 o1 = size%PAGE_SIZE;
621 o2 = (size+(size/4))%PAGE_SIZE;
622 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
623 break;
624 }
625 case 16: {
626 /* create some offsets inside the page table */
627 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
628 m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
629 m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
630 o1 = size%PAGE_SIZE;
631 o2 = (size+(size/2))%PAGE_SIZE;
632 DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2));
633 break;
634 }
635 default: {
636 return -1;
637 }
638 }
639
640 ptr1 = pt1->cpu;
641 ptr2 = pt2->cpu;
642 ptr3 = pt3->cpu;
643
644 /* walk all pages, copy all page addresses to ptr1 */
645 for (i = 0; i < length; i++, list++) {
646 for (p = 0; p * 4096 < list->length; p++, ptr1++) {
647 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
648 }
649 }
650 /*
651 ptr1 = pt1->cpu;
652 for(j=0;j<40;j++) {
653 printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
654 }
655 */
656
657 /* if we have a user buffer, the first page may not be
658 aligned to a page boundary. */
659 pt1->offset = list->offset;
660 pt2->offset = pt1->offset+o1;
661 pt3->offset = pt1->offset+o2;
662
663 /* create video-dma2 page table */
664 ptr1 = pt1->cpu;
665 for(i = m1; i <= m2 ; i++, ptr2++) {
666 *ptr2 = ptr1[i];
667 }
668 fill = *(ptr2-1);
669 for(;i<1024;i++,ptr2++) {
670 *ptr2 = fill;
671 }
672 /* create video-dma3 page table */
673 ptr1 = pt1->cpu;
674 for(i = m2; i <= m3; i++,ptr3++) {
675 *ptr3 = ptr1[i];
676 }
677 fill = *(ptr3-1);
678 for(;i<1024;i++,ptr3++) {
679 *ptr3 = fill;
680 }
681 /* finally: finish up video-dma1 page table */
682 ptr1 = pt1->cpu+m1;
683 fill = pt1->cpu[m1];
684 for(i=m1;i<1024;i++,ptr1++) {
685 *ptr1 = fill;
686 }
687 /*
688 ptr1 = pt1->cpu;
689 ptr2 = pt2->cpu;
690 ptr3 = pt3->cpu;
691 for(j=0;j<40;j++) {
692 printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
693 }
694 for(j=0;j<40;j++) {
695 printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
696 }
697 for(j=0;j<40;j++) {
698 printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
699 }
700 */
701 } else {
702 struct saa7146_pgtable *pt = &buf->pt[0];
703 return saa7146_pgtable_build_single(pci, pt, list, length);
704 }
705
706 return 0;
707 }
708
709
710 /********************************************************************************/
711 /* file operations */
712
713 static int video_begin(struct saa7146_fh *fh)
714 {
715 struct saa7146_dev *dev = fh->dev;
716 struct saa7146_vv *vv = dev->vv_data;
717 struct saa7146_format *fmt = NULL;
718 unsigned int resource;
719 int ret = 0, err = 0;
720
721 DEB_EE(("dev:%p, fh:%p\n",dev,fh));
722
723 if ((vv->video_status & STATUS_CAPTURE) != 0) {
724 if (vv->video_fh == fh) {
725 DEB_S(("already capturing.\n"));
726 return 0;
727 }
728 DEB_S(("already capturing in another open.\n"));
729 return -EBUSY;
730 }
731
732 if ((vv->video_status & STATUS_OVERLAY) != 0) {
733 DEB_S(("warning: suspending overlay video for streaming capture.\n"));
734 vv->ov_suspend = vv->video_fh;
735 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
736 if (0 != err) {
737 DEB_D(("suspending video failed. aborting\n"));
738 return err;
739 }
740 }
741
742 fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
743 /* we need to have a valid format set here */
744 BUG_ON(NULL == fmt);
745
746 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
747 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
748 } else {
749 resource = RESOURCE_DMA1_HPS;
750 }
751
752 ret = saa7146_res_get(fh, resource);
753 if (0 == ret) {
754 DEB_S(("cannot get capture resource %d\n",resource));
755 if (vv->ov_suspend != NULL) {
756 saa7146_start_preview(vv->ov_suspend);
757 vv->ov_suspend = NULL;
758 }
759 return -EBUSY;
760 }
761
762 /* clear out beginning of streaming bit (rps register 0)*/
763 saa7146_write(dev, MC2, MASK_27 );
764
765 /* enable rps0 irqs */
766 SAA7146_IER_ENABLE(dev, MASK_27);
767
768 vv->video_fh = fh;
769 vv->video_status = STATUS_CAPTURE;
770
771 return 0;
772 }
773
774 static int video_end(struct saa7146_fh *fh, struct file *file)
775 {
776 struct saa7146_dev *dev = fh->dev;
777 struct saa7146_vv *vv = dev->vv_data;
778 struct saa7146_format *fmt = NULL;
779 unsigned long flags;
780 unsigned int resource;
781 u32 dmas = 0;
782 DEB_EE(("dev:%p, fh:%p\n",dev,fh));
783
784 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
785 DEB_S(("not capturing.\n"));
786 return 0;
787 }
788
789 if (vv->video_fh != fh) {
790 DEB_S(("capturing, but in another open.\n"));
791 return -EBUSY;
792 }
793
794 fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
795 /* we need to have a valid format set here */
796 BUG_ON(NULL == fmt);
797
798 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
799 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
800 dmas = MASK_22 | MASK_21 | MASK_20;
801 } else {
802 resource = RESOURCE_DMA1_HPS;
803 dmas = MASK_22;
804 }
805 spin_lock_irqsave(&dev->slock,flags);
806
807 /* disable rps0 */
808 saa7146_write(dev, MC1, MASK_28);
809
810 /* disable rps0 irqs */
811 SAA7146_IER_DISABLE(dev, MASK_27);
812
813 /* shut down all used video dma transfers */
814 saa7146_write(dev, MC1, dmas);
815
816 spin_unlock_irqrestore(&dev->slock, flags);
817
818 vv->video_fh = NULL;
819 vv->video_status = 0;
820
821 saa7146_res_free(fh, resource);
822
823 if (vv->ov_suspend != NULL) {
824 saa7146_start_preview(vv->ov_suspend);
825 vv->ov_suspend = NULL;
826 }
827
828 return 0;
829 }
830
831 /*
832 * This function is _not_ called directly, but from
833 * video_generic_ioctl (and maybe others). userspace
834 * copying is done already, arg is a kernel pointer.
835 */
836
837 int saa7146_video_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg)
838 {
839 struct saa7146_fh *fh = file->private_data;
840 struct saa7146_dev *dev = fh->dev;
841 struct saa7146_vv *vv = dev->vv_data;
842
843 int err = 0, result = 0, ee = 0;
844
845 struct saa7146_use_ops *ops;
846 struct videobuf_queue *q;
847
848 /* check if extension handles the command */
849 for(ee = 0; dev->ext_vv_data->ioctls[ee].flags != 0; ee++) {
850 if( cmd == dev->ext_vv_data->ioctls[ee].cmd )
851 break;
852 }
853
854 if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_EXCLUSIVE) ) {
855 DEB_D(("extension handles ioctl exclusive.\n"));
856 result = dev->ext_vv_data->ioctl(fh, cmd, arg);
857 return result;
858 }
859 if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_BEFORE) ) {
860 DEB_D(("extension handles ioctl before.\n"));
861 result = dev->ext_vv_data->ioctl(fh, cmd, arg);
862 if( -EAGAIN != result ) {
863 return result;
864 }
865 }
866
867 /* fixme: add handle "after" case (is it still needed?) */
868
869 switch (fh->type) {
870 case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
871 ops = &saa7146_video_uops;
872 q = &fh->video_q;
873 break;
874 }
875 case V4L2_BUF_TYPE_VBI_CAPTURE: {
876 ops = &saa7146_vbi_uops;
877 q = &fh->vbi_q;
878 break;
879 }
880 default:
881 BUG();
882 return 0;
883 }
884
885 switch (cmd) {
886 case VIDIOC_QUERYCAP:
887 {
888 struct v4l2_capability *cap = arg;
889 memset(cap,0,sizeof(*cap));
890
891 DEB_EE(("VIDIOC_QUERYCAP\n"));
892
893 strcpy((char *)cap->driver, "saa7146 v4l2");
894 strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
895 sprintf((char *)cap->bus_info,"PCI:%s", pci_name(dev->pci));
896 cap->version = SAA7146_VERSION_CODE;
897 cap->capabilities =
898 V4L2_CAP_VIDEO_CAPTURE |
899 V4L2_CAP_VIDEO_OVERLAY |
900 V4L2_CAP_READWRITE |
901 V4L2_CAP_STREAMING;
902 cap->capabilities |= dev->ext_vv_data->capabilities;
903 return 0;
904 }
905 case VIDIOC_G_FBUF:
906 {
907 struct v4l2_framebuffer *fb = arg;
908
909 DEB_EE(("VIDIOC_G_FBUF\n"));
910
911 *fb = vv->ov_fb;
912 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
913 return 0;
914 }
915 case VIDIOC_S_FBUF:
916 {
917 struct v4l2_framebuffer *fb = arg;
918 struct saa7146_format *fmt;
919
920 DEB_EE(("VIDIOC_S_FBUF\n"));
921
922 if(!capable(CAP_SYS_ADMIN) &&
923 !capable(CAP_SYS_RAWIO))
924 return -EPERM;
925
926 /* check args */
927 fmt = format_by_fourcc(dev,fb->fmt.pixelformat);
928 if (NULL == fmt) {
929 return -EINVAL;
930 }
931
932 /* planar formats are not allowed for overlay video, clipping and video dma would clash */
933 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
934 DEB_S(("planar pixelformat '%4.4s' not allowed for overlay\n",(char *)&fmt->pixelformat));
935 }
936
937 /* check if overlay is running */
938 if (IS_OVERLAY_ACTIVE(fh) != 0) {
939 if (vv->video_fh != fh) {
940 DEB_D(("refusing to change framebuffer informations while overlay is active in another open.\n"));
941 return -EBUSY;
942 }
943 }
944
945 mutex_lock(&dev->lock);
946
947 /* ok, accept it */
948 vv->ov_fb = *fb;
949 vv->ov_fmt = fmt;
950 if (0 == vv->ov_fb.fmt.bytesperline)
951 vv->ov_fb.fmt.bytesperline =
952 vv->ov_fb.fmt.width*fmt->depth/8;
953
954 mutex_unlock(&dev->lock);
955
956 return 0;
957 }
958 case VIDIOC_ENUM_FMT:
959 {
960 struct v4l2_fmtdesc *f = arg;
961 int index;
962
963 switch (f->type) {
964 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
965 case V4L2_BUF_TYPE_VIDEO_OVERLAY: {
966 index = f->index;
967 if (index < 0 || index >= NUM_FORMATS) {
968 return -EINVAL;
969 }
970 memset(f,0,sizeof(*f));
971 f->index = index;
972 strlcpy((char *)f->description,formats[index].name,sizeof(f->description));
973 f->pixelformat = formats[index].pixelformat;
974 break;
975 }
976 default:
977 return -EINVAL;
978 }
979
980 DEB_EE(("VIDIOC_ENUM_FMT: type:%d, index:%d\n",f->type,f->index));
981 return 0;
982 }
983 case VIDIOC_QUERYCTRL:
984 {
985 const struct v4l2_queryctrl *ctrl;
986 struct v4l2_queryctrl *c = arg;
987
988 if ((c->id < V4L2_CID_BASE ||
989 c->id >= V4L2_CID_LASTP1) &&
990 (c->id < V4L2_CID_PRIVATE_BASE ||
991 c->id >= V4L2_CID_PRIVATE_LASTP1))
992 return -EINVAL;
993
994 ctrl = ctrl_by_id(c->id);
995 if( NULL == ctrl ) {
996 return -EINVAL;
997 /*
998 c->flags = V4L2_CTRL_FLAG_DISABLED;
999 return 0;
1000 */
1001 }
1002
1003 DEB_EE(("VIDIOC_QUERYCTRL: id:%d\n",c->id));
1004 *c = *ctrl;
1005 return 0;
1006 }
1007 case VIDIOC_G_CTRL: {
1008 DEB_EE(("VIDIOC_G_CTRL\n"));
1009 return get_control(fh,arg);
1010 }
1011 case VIDIOC_S_CTRL:
1012 {
1013 DEB_EE(("VIDIOC_S_CTRL\n"));
1014 err = set_control(fh,arg);
1015 return err;
1016 }
1017 case VIDIOC_G_PARM:
1018 {
1019 struct v4l2_streamparm *parm = arg;
1020 if( parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ) {
1021 return -EINVAL;
1022 }
1023 memset(&parm->parm.capture,0,sizeof(struct v4l2_captureparm));
1024 parm->parm.capture.readbuffers = 1;
1025 // fixme: only for PAL!
1026 parm->parm.capture.timeperframe.numerator = 1;
1027 parm->parm.capture.timeperframe.denominator = 25;
1028 return 0;
1029 }
1030 case VIDIOC_G_FMT:
1031 {
1032 struct v4l2_format *f = arg;
1033 DEB_EE(("VIDIOC_G_FMT\n"));
1034 return g_fmt(fh,f);
1035 }
1036 case VIDIOC_S_FMT:
1037 {
1038 struct v4l2_format *f = arg;
1039 DEB_EE(("VIDIOC_S_FMT\n"));
1040 return s_fmt(fh,f);
1041 }
1042 case VIDIOC_TRY_FMT:
1043 {
1044 struct v4l2_format *f = arg;
1045 DEB_EE(("VIDIOC_TRY_FMT\n"));
1046 return try_fmt(fh,f);
1047 }
1048 case VIDIOC_G_STD:
1049 {
1050 v4l2_std_id *id = arg;
1051 DEB_EE(("VIDIOC_G_STD\n"));
1052 *id = vv->standard->id;
1053 return 0;
1054 }
1055 /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
1056 PAL / NTSC / SECAM. if your hardware does not (or does more)
1057 -- override this function in your extension */
1058 case VIDIOC_ENUMSTD:
1059 {
1060 struct v4l2_standard *e = arg;
1061 if (e->index < 0 )
1062 return -EINVAL;
1063 if( e->index < dev->ext_vv_data->num_stds ) {
1064 DEB_EE(("VIDIOC_ENUMSTD: index:%d\n",e->index));
1065 v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
1066 return 0;
1067 }
1068 return -EINVAL;
1069 }
1070 case VIDIOC_S_STD:
1071 {
1072 v4l2_std_id *id = arg;
1073 int found = 0;
1074 int i, err;
1075
1076 DEB_EE(("VIDIOC_S_STD\n"));
1077
1078 if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
1079 DEB_D(("cannot change video standard while streaming capture is active\n"));
1080 return -EBUSY;
1081 }
1082
1083 if ((vv->video_status & STATUS_OVERLAY) != 0) {
1084 vv->ov_suspend = vv->video_fh;
1085 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
1086 if (0 != err) {
1087 DEB_D(("suspending video failed. aborting\n"));
1088 return err;
1089 }
1090 }
1091
1092 mutex_lock(&dev->lock);
1093
1094 for(i = 0; i < dev->ext_vv_data->num_stds; i++)
1095 if (*id & dev->ext_vv_data->stds[i].id)
1096 break;
1097 if (i != dev->ext_vv_data->num_stds) {
1098 vv->standard = &dev->ext_vv_data->stds[i];
1099 if( NULL != dev->ext_vv_data->std_callback )
1100 dev->ext_vv_data->std_callback(dev, vv->standard);
1101 found = 1;
1102 }
1103
1104 mutex_unlock(&dev->lock);
1105
1106 if (vv->ov_suspend != NULL) {
1107 saa7146_start_preview(vv->ov_suspend);
1108 vv->ov_suspend = NULL;
1109 }
1110
1111 if( 0 == found ) {
1112 DEB_EE(("VIDIOC_S_STD: standard not found.\n"));
1113 return -EINVAL;
1114 }
1115
1116 DEB_EE(("VIDIOC_S_STD: set to standard to '%s'\n",vv->standard->name));
1117 return 0;
1118 }
1119 case VIDIOC_OVERLAY:
1120 {
1121 int on = *(int *)arg;
1122 int err = 0;
1123
1124 DEB_D(("VIDIOC_OVERLAY on:%d\n",on));
1125 if (on != 0) {
1126 err = saa7146_start_preview(fh);
1127 } else {
1128 err = saa7146_stop_preview(fh);
1129 }
1130 return err;
1131 }
1132 case VIDIOC_REQBUFS: {
1133 struct v4l2_requestbuffers *req = arg;
1134 DEB_D(("VIDIOC_REQBUFS, type:%d\n",req->type));
1135 return videobuf_reqbufs(q,req);
1136 }
1137 case VIDIOC_QUERYBUF: {
1138 struct v4l2_buffer *buf = arg;
1139 DEB_D(("VIDIOC_QUERYBUF, type:%d, offset:%d\n",buf->type,buf->m.offset));
1140 return videobuf_querybuf(q,buf);
1141 }
1142 case VIDIOC_QBUF: {
1143 struct v4l2_buffer *buf = arg;
1144 int ret = 0;
1145 ret = videobuf_qbuf(q,buf);
1146 DEB_D(("VIDIOC_QBUF: ret:%d, index:%d\n",ret,buf->index));
1147 return ret;
1148 }
1149 case VIDIOC_DQBUF: {
1150 struct v4l2_buffer *buf = arg;
1151 int ret = 0;
1152 ret = videobuf_dqbuf(q,buf,file->f_flags & O_NONBLOCK);
1153 DEB_D(("VIDIOC_DQBUF: ret:%d, index:%d\n",ret,buf->index));
1154 return ret;
1155 }
1156 case VIDIOC_STREAMON: {
1157 int *type = arg;
1158 DEB_D(("VIDIOC_STREAMON, type:%d\n",*type));
1159
1160 err = video_begin(fh);
1161 if( 0 != err) {
1162 return err;
1163 }
1164 err = videobuf_streamon(q);
1165 return err;
1166 }
1167 case VIDIOC_STREAMOFF: {
1168 int *type = arg;
1169
1170 DEB_D(("VIDIOC_STREAMOFF, type:%d\n",*type));
1171
1172 /* ugly: we need to copy some checks from video_end(),
1173 because videobuf_streamoff() relies on the capture running.
1174 check and fix this */
1175 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
1176 DEB_S(("not capturing.\n"));
1177 return 0;
1178 }
1179
1180 if (vv->video_fh != fh) {
1181 DEB_S(("capturing, but in another open.\n"));
1182 return -EBUSY;
1183 }
1184
1185 err = videobuf_streamoff(q);
1186 if (0 != err) {
1187 DEB_D(("warning: videobuf_streamoff() failed.\n"));
1188 video_end(fh, file);
1189 } else {
1190 err = video_end(fh, file);
1191 }
1192 return err;
1193 }
1194 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1195 case VIDIOCGMBUF:
1196 {
1197 struct video_mbuf *mbuf = arg;
1198 struct videobuf_queue *q;
1199 int i;
1200
1201 /* fixme: number of capture buffers and sizes for v4l apps */
1202 int gbuffers = 2;
1203 int gbufsize = 768*576*4;
1204
1205 DEB_D(("VIDIOCGMBUF \n"));
1206
1207 q = &fh->video_q;
1208 err = videobuf_mmap_setup(q,gbuffers,gbufsize,
1209 V4L2_MEMORY_MMAP);
1210 if (err < 0)
1211 return err;
1212
1213 gbuffers = err;
1214 memset(mbuf,0,sizeof(*mbuf));
1215 mbuf->frames = gbuffers;
1216 mbuf->size = gbuffers * gbufsize;
1217 for (i = 0; i < gbuffers; i++)
1218 mbuf->offsets[i] = i * gbufsize;
1219 return 0;
1220 }
1221 #endif
1222 default:
1223 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
1224 saa7146_video_do_ioctl);
1225 }
1226 return 0;
1227 }
1228
1229 /*********************************************************************************/
1230 /* buffer handling functions */
1231
1232 static int buffer_activate (struct saa7146_dev *dev,
1233 struct saa7146_buf *buf,
1234 struct saa7146_buf *next)
1235 {
1236 struct saa7146_vv *vv = dev->vv_data;
1237
1238 buf->vb.state = VIDEOBUF_ACTIVE;
1239 saa7146_set_capture(dev,buf,next);
1240
1241 mod_timer(&vv->video_q.timeout, jiffies+BUFFER_TIMEOUT);
1242 return 0;
1243 }
1244
1245 static int buffer_prepare(struct videobuf_queue *q,
1246 struct videobuf_buffer *vb, enum v4l2_field field)
1247 {
1248 struct file *file = q->priv_data;
1249 struct saa7146_fh *fh = file->private_data;
1250 struct saa7146_dev *dev = fh->dev;
1251 struct saa7146_vv *vv = dev->vv_data;
1252 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1253 int size,err = 0;
1254
1255 DEB_CAP(("vbuf:%p\n",vb));
1256
1257 /* sanity checks */
1258 if (fh->video_fmt.width < 48 ||
1259 fh->video_fmt.height < 32 ||
1260 fh->video_fmt.width > vv->standard->h_max_out ||
1261 fh->video_fmt.height > vv->standard->v_max_out) {
1262 DEB_D(("w (%d) / h (%d) out of bounds.\n",fh->video_fmt.width,fh->video_fmt.height));
1263 return -EINVAL;
1264 }
1265
1266 size = fh->video_fmt.sizeimage;
1267 if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1268 DEB_D(("size mismatch.\n"));
1269 return -EINVAL;
1270 }
1271
1272 DEB_CAP(("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1273 fh->video_fmt.width,fh->video_fmt.height,size,v4l2_field_names[fh->video_fmt.field]));
1274 if (buf->vb.width != fh->video_fmt.width ||
1275 buf->vb.bytesperline != fh->video_fmt.bytesperline ||
1276 buf->vb.height != fh->video_fmt.height ||
1277 buf->vb.size != size ||
1278 buf->vb.field != field ||
1279 buf->vb.field != fh->video_fmt.field ||
1280 buf->fmt != &fh->video_fmt) {
1281 saa7146_dma_free(dev,q,buf);
1282 }
1283
1284 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1285 struct saa7146_format *sfmt;
1286
1287 buf->vb.bytesperline = fh->video_fmt.bytesperline;
1288 buf->vb.width = fh->video_fmt.width;
1289 buf->vb.height = fh->video_fmt.height;
1290 buf->vb.size = size;
1291 buf->vb.field = field;
1292 buf->fmt = &fh->video_fmt;
1293 buf->vb.field = fh->video_fmt.field;
1294
1295 sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
1296
1297 if( 0 != IS_PLANAR(sfmt->trans)) {
1298 saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1299 saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1300 saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1301
1302 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1303 saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1304 saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1305 } else {
1306 saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1307 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1308 }
1309
1310 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1311 if (err)
1312 goto oops;
1313 err = saa7146_pgtable_build(dev,buf);
1314 if (err)
1315 goto oops;
1316 }
1317 buf->vb.state = VIDEOBUF_PREPARED;
1318 buf->activate = buffer_activate;
1319
1320 return 0;
1321
1322 oops:
1323 DEB_D(("error out.\n"));
1324 saa7146_dma_free(dev,q,buf);
1325
1326 return err;
1327 }
1328
1329 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1330 {
1331 struct file *file = q->priv_data;
1332 struct saa7146_fh *fh = file->private_data;
1333
1334 if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1335 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1336
1337 *size = fh->video_fmt.sizeimage;
1338
1339 /* check if we exceed the "max_memory" parameter */
1340 if( (*count * *size) > (max_memory*1048576) ) {
1341 *count = (max_memory*1048576) / *size;
1342 }
1343
1344 DEB_CAP(("%d buffers, %d bytes each.\n",*count,*size));
1345
1346 return 0;
1347 }
1348
1349 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1350 {
1351 struct file *file = q->priv_data;
1352 struct saa7146_fh *fh = file->private_data;
1353 struct saa7146_dev *dev = fh->dev;
1354 struct saa7146_vv *vv = dev->vv_data;
1355 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1356
1357 DEB_CAP(("vbuf:%p\n",vb));
1358 saa7146_buffer_queue(fh->dev,&vv->video_q,buf);
1359 }
1360
1361 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1362 {
1363 struct file *file = q->priv_data;
1364 struct saa7146_fh *fh = file->private_data;
1365 struct saa7146_dev *dev = fh->dev;
1366 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1367
1368 DEB_CAP(("vbuf:%p\n",vb));
1369 saa7146_dma_free(dev,q,buf);
1370 }
1371
1372 static struct videobuf_queue_ops video_qops = {
1373 .buf_setup = buffer_setup,
1374 .buf_prepare = buffer_prepare,
1375 .buf_queue = buffer_queue,
1376 .buf_release = buffer_release,
1377 };
1378
1379 /********************************************************************************/
1380 /* file operations */
1381
1382 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1383 {
1384 INIT_LIST_HEAD(&vv->video_q.queue);
1385
1386 init_timer(&vv->video_q.timeout);
1387 vv->video_q.timeout.function = saa7146_buffer_timeout;
1388 vv->video_q.timeout.data = (unsigned long)(&vv->video_q);
1389 vv->video_q.dev = dev;
1390
1391 /* set some default values */
1392 vv->standard = &dev->ext_vv_data->stds[0];
1393
1394 /* FIXME: what's this? */
1395 vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1396 vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1397 }
1398
1399
1400 static int video_open(struct saa7146_dev *dev, struct file *file)
1401 {
1402 struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1403 struct saa7146_format *sfmt;
1404
1405 fh->video_fmt.width = 384;
1406 fh->video_fmt.height = 288;
1407 fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24;
1408 fh->video_fmt.bytesperline = 0;
1409 fh->video_fmt.field = V4L2_FIELD_ANY;
1410 sfmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
1411 fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8;
1412
1413 videobuf_queue_pci_init(&fh->video_q, &video_qops,
1414 dev->pci, &dev->slock,
1415 V4L2_BUF_TYPE_VIDEO_CAPTURE,
1416 V4L2_FIELD_INTERLACED,
1417 sizeof(struct saa7146_buf),
1418 file);
1419
1420 return 0;
1421 }
1422
1423
1424 static void video_close(struct saa7146_dev *dev, struct file *file)
1425 {
1426 struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1427 struct saa7146_vv *vv = dev->vv_data;
1428 struct videobuf_queue *q = &fh->video_q;
1429 int err;
1430
1431 if (IS_CAPTURE_ACTIVE(fh) != 0) {
1432 err = video_end(fh, file);
1433 } else if (IS_OVERLAY_ACTIVE(fh) != 0) {
1434 err = saa7146_stop_preview(fh);
1435 }
1436
1437 videobuf_stop(q);
1438
1439 /* hmm, why is this function declared void? */
1440 /* return err */
1441 }
1442
1443
1444 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1445 {
1446 struct saa7146_vv *vv = dev->vv_data;
1447 struct saa7146_dmaqueue *q = &vv->video_q;
1448
1449 spin_lock(&dev->slock);
1450 DEB_CAP(("called.\n"));
1451
1452 /* only finish the buffer if we have one... */
1453 if( NULL != q->curr ) {
1454 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1455 }
1456 saa7146_buffer_next(dev,q,0);
1457
1458 spin_unlock(&dev->slock);
1459 }
1460
1461 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1462 {
1463 struct saa7146_fh *fh = file->private_data;
1464 struct saa7146_dev *dev = fh->dev;
1465 struct saa7146_vv *vv = dev->vv_data;
1466 ssize_t ret = 0;
1467
1468 DEB_EE(("called.\n"));
1469
1470 if ((vv->video_status & STATUS_CAPTURE) != 0) {
1471 /* fixme: should we allow read() captures while streaming capture? */
1472 if (vv->video_fh == fh) {
1473 DEB_S(("already capturing.\n"));
1474 return -EBUSY;
1475 }
1476 DEB_S(("already capturing in another open.\n"));
1477 return -EBUSY;
1478 }
1479
1480 ret = video_begin(fh);
1481 if( 0 != ret) {
1482 goto out;
1483 }
1484
1485 ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1486 file->f_flags & O_NONBLOCK);
1487 if (ret != 0) {
1488 video_end(fh, file);
1489 } else {
1490 ret = video_end(fh, file);
1491 }
1492 out:
1493 /* restart overlay if it was active before */
1494 if (vv->ov_suspend != NULL) {
1495 saa7146_start_preview(vv->ov_suspend);
1496 vv->ov_suspend = NULL;
1497 }
1498
1499 return ret;
1500 }
1501
1502 struct saa7146_use_ops saa7146_video_uops = {
1503 .init = video_init,
1504 .open = video_open,
1505 .release = video_close,
1506 .irq_done = video_irq_done,
1507 .read = video_read,
1508 };
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