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V4L/DVB (10138): v4l2-ioctl: change to long return type to match unlocked_ioctl.
[deliverable/linux.git] / drivers / media / common / saa7146_video.c
CommitLineData
1da177e4
LT		 1#include <media/saa7146_vv.h>
2
3static int max_memory = 32;
4
5module_param(max_memory, int, 0644);
6MODULE_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 */
15static 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
84static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
85
86struct 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
100static 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
123static 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) {
afd1a0c9 153 field = (win->w.height > maxh/2)
50c25fff
MK		 154 ? V4L2_FIELD_INTERLACED
155 : V4L2_FIELD_TOP;
afd1a0c9
MCC		 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: {
1da177e4 166 DEB_D(("no known field mode '%d'.\n",field));
afd1a0c9
MCC		 167 return -EINVAL;
168 }
1da177e4 169 }
1da177e4
LT		 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
180static 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
262int 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}
5d7dc8c4 321EXPORT_SYMBOL_GPL(saa7146_start_preview);
1da177e4
LT		 322
323int 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}
5d7dc8c4 356EXPORT_SYMBOL_GPL(saa7146_stop_preview);
1da177e4
LT		 357
358static 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;
3593cab5 383 mutex_lock(&dev->lock);
1da177e4
LT		 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)) {
3593cab5 389 mutex_unlock(&dev->lock);
1da177e4
LT		 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
3593cab5 396 mutex_unlock(&dev->lock);
1da177e4
LT		 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
413static 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};
452static int NUM_CONTROLS = sizeof(controls)/sizeof(struct v4l2_queryctrl);
453
454#define V4L2_CID_PRIVATE_LASTP1 (V4L2_CID_PRIVATE_BASE + 0)
455
456static 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
466static 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
508static 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
3593cab5 521 mutex_lock(&dev->lock);
1da177e4
LT		 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"));
3593cab5 565 mutex_unlock(&dev->lock);
1da177e4
LT		 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"));
3593cab5 573 mutex_unlock(&dev->lock);
1da177e4
LT		 574 return -EINVAL;
575 }
576 vv->vflip = c->value;
577 break;
578 default: {
579 return -EINVAL;
580 }
581 }
3593cab5 582 mutex_unlock(&dev->lock);
1da177e4
LT		 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
594static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
595{
596 struct pci_dev *pci = dev->pci;
c1accaa2
MCC		 597 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
598 struct scatterlist *list = dma->sglist;
599 int length = dma->sglen;
1da177e4
LT		 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];
a36ef6b1
AV		 608 __le32 *ptr1, *ptr2, *ptr3;
609 __le32 fill;
1da177e4
LT		 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. */
429e9089 659 pt1->offset = dma->sglist->offset;
1da177e4
LT		 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
713static 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
774static 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
069b7479 837long saa7146_video_do_ioctl(struct file *file, unsigned int cmd, void *arg)
1da177e4
LT		 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
069b7479
HV		 843 long err = 0;
844 int result = 0, ee = 0;
1da177e4
LT		 845
846 struct saa7146_use_ops *ops;
847 struct videobuf_queue *q;
848
849 /* check if extension handles the command */
850 for(ee = 0; dev->ext_vv_data->ioctls[ee].flags != 0; ee++) {
851 if( cmd == dev->ext_vv_data->ioctls[ee].cmd )
852 break;
853 }
854
855 if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_EXCLUSIVE) ) {
856 DEB_D(("extension handles ioctl exclusive.\n"));
857 result = dev->ext_vv_data->ioctl(fh, cmd, arg);
858 return result;
859 }
860 if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_BEFORE) ) {
861 DEB_D(("extension handles ioctl before.\n"));
862 result = dev->ext_vv_data->ioctl(fh, cmd, arg);
863 if( -EAGAIN != result ) {
864 return result;
865 }
866 }
867
868 /* fixme: add handle "after" case (is it still needed?) */
869
870 switch (fh->type) {
871 case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
872 ops = &saa7146_video_uops;
873 q = &fh->video_q;
874 break;
875 }
876 case V4L2_BUF_TYPE_VBI_CAPTURE: {
877 ops = &saa7146_vbi_uops;
878 q = &fh->vbi_q;
879 break;
880 }
881 default:
882 BUG();
883 return 0;
884 }
885
886 switch (cmd) {
887 case VIDIOC_QUERYCAP:
888 {
889 struct v4l2_capability *cap = arg;
890 memset(cap,0,sizeof(*cap));
891
892 DEB_EE(("VIDIOC_QUERYCAP\n"));
893
804b4458
OE		 894 strcpy((char *)cap->driver, "saa7146 v4l2");
895 strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
896 sprintf((char *)cap->bus_info,"PCI:%s", pci_name(dev->pci));
1da177e4
LT		 897 cap->version = SAA7146_VERSION_CODE;
898 cap->capabilities =
899 V4L2_CAP_VIDEO_CAPTURE |
900 V4L2_CAP_VIDEO_OVERLAY |
901 V4L2_CAP_READWRITE |
902 V4L2_CAP_STREAMING;
903 cap->capabilities |= dev->ext_vv_data->capabilities;
904 return 0;
905 }
906 case VIDIOC_G_FBUF:
907 {
908 struct v4l2_framebuffer *fb = arg;
909
910 DEB_EE(("VIDIOC_G_FBUF\n"));
911
912 *fb = vv->ov_fb;
913 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
914 return 0;
915 }
916 case VIDIOC_S_FBUF:
917 {
918 struct v4l2_framebuffer *fb = arg;
919 struct saa7146_format *fmt;
920
921 DEB_EE(("VIDIOC_S_FBUF\n"));
922
923 if(!capable(CAP_SYS_ADMIN) &&
924 !capable(CAP_SYS_RAWIO))
925 return -EPERM;
926
927 /* check args */
928 fmt = format_by_fourcc(dev,fb->fmt.pixelformat);
929 if (NULL == fmt) {
930 return -EINVAL;
931 }
932
933 /* planar formats are not allowed for overlay video, clipping and video dma would clash */
934 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
935 DEB_S(("planar pixelformat '%4.4s' not allowed for overlay\n",(char *)&fmt->pixelformat));
936 }
937
938 /* check if overlay is running */
939 if (IS_OVERLAY_ACTIVE(fh) != 0) {
940 if (vv->video_fh != fh) {
941 DEB_D(("refusing to change framebuffer informations while overlay is active in another open.\n"));
942 return -EBUSY;
943 }
944 }
945
3593cab5 946 mutex_lock(&dev->lock);
1da177e4
LT		 947
948 /* ok, accept it */
949 vv->ov_fb = *fb;
950 vv->ov_fmt = fmt;
951 if (0 == vv->ov_fb.fmt.bytesperline)
952 vv->ov_fb.fmt.bytesperline =
953 vv->ov_fb.fmt.width*fmt->depth/8;
954
3593cab5 955 mutex_unlock(&dev->lock);
1da177e4
LT		 956
957 return 0;
958 }
959 case VIDIOC_ENUM_FMT:
960 {
961 struct v4l2_fmtdesc *f = arg;
1da177e4
LT		 962
963 switch (f->type) {
964 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
f796804f
HV		 965 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
966 if (f->index >= NUM_FORMATS)
1da177e4 967 return -EINVAL;
f796804f
HV		 968 strlcpy((char *)f->description, formats[f->index].name,
969 sizeof(f->description));
970 f->pixelformat = formats[f->index].pixelformat;
971 f->flags = 0;
972 memset(f->reserved, 0, sizeof(f->reserved));
1da177e4 973 break;
1da177e4
LT		 974 default:
975 return -EINVAL;
976 }
977
978 DEB_EE(("VIDIOC_ENUM_FMT: type:%d, index:%d\n",f->type,f->index));
979 return 0;
980 }
981 case VIDIOC_QUERYCTRL:
982 {
983 const struct v4l2_queryctrl *ctrl;
984 struct v4l2_queryctrl *c = arg;
985
986 if ((c->id < V4L2_CID_BASE ||
987 c->id >= V4L2_CID_LASTP1) &&
988 (c->id < V4L2_CID_PRIVATE_BASE ||
989 c->id >= V4L2_CID_PRIVATE_LASTP1))
990 return -EINVAL;
991
992 ctrl = ctrl_by_id(c->id);
993 if( NULL == ctrl ) {
994 return -EINVAL;
995/*
996 c->flags = V4L2_CTRL_FLAG_DISABLED;
997 return 0;
998*/
999 }
1000
1001 DEB_EE(("VIDIOC_QUERYCTRL: id:%d\n",c->id));
1002 *c = *ctrl;
1003 return 0;
1004 }
1005 case VIDIOC_G_CTRL: {
1006 DEB_EE(("VIDIOC_G_CTRL\n"));
1007 return get_control(fh,arg);
1008 }
1009 case VIDIOC_S_CTRL:
1010 {
1011 DEB_EE(("VIDIOC_S_CTRL\n"));
1012 err = set_control(fh,arg);
1013 return err;
1014 }
afd1a0c9
MCC		 1015 case VIDIOC_G_PARM:
1016 {
1017 struct v4l2_streamparm *parm = arg;
1da177e4
LT		 1018 if( parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ) {
1019 return -EINVAL;
1020 }
afd1a0c9 1021 memset(&parm->parm.capture,0,sizeof(struct v4l2_captureparm));
1da177e4
LT		 1022 parm->parm.capture.readbuffers = 1;
1023 // fixme: only for PAL!
1024 parm->parm.capture.timeperframe.numerator = 1;
1025 parm->parm.capture.timeperframe.denominator = 25;
afd1a0c9
MCC		 1026 return 0;
1027 }
1da177e4
LT		 1028 case VIDIOC_G_FMT:
1029 {
1030 struct v4l2_format *f = arg;
1031 DEB_EE(("VIDIOC_G_FMT\n"));
1032 return g_fmt(fh,f);
1033 }
1034 case VIDIOC_S_FMT:
1035 {
1036 struct v4l2_format *f = arg;
1037 DEB_EE(("VIDIOC_S_FMT\n"));
1038 return s_fmt(fh,f);
1039 }
1040 case VIDIOC_TRY_FMT:
1041 {
1042 struct v4l2_format *f = arg;
1043 DEB_EE(("VIDIOC_TRY_FMT\n"));
1044 return try_fmt(fh,f);
1045 }
1046 case VIDIOC_G_STD:
1047 {
1048 v4l2_std_id *id = arg;
1049 DEB_EE(("VIDIOC_G_STD\n"));
1050 *id = vv->standard->id;
1051 return 0;
1052 }
1053 /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
1054 PAL / NTSC / SECAM. if your hardware does not (or does more)
1055 -- override this function in your extension */
1056 case VIDIOC_ENUMSTD:
1057 {
1058 struct v4l2_standard *e = arg;
1059 if (e->index < 0 )
1060 return -EINVAL;
1061 if( e->index < dev->ext_vv_data->num_stds ) {
1062 DEB_EE(("VIDIOC_ENUMSTD: index:%d\n",e->index));
1063 v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
1064 return 0;
1065 }
1066 return -EINVAL;
1067 }
1068 case VIDIOC_S_STD:
1069 {
1070 v4l2_std_id *id = arg;
1071 int found = 0;
c6eb8eaf 1072 int i;
1da177e4
LT		 1073
1074 DEB_EE(("VIDIOC_S_STD\n"));
1075
1076 if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
1077 DEB_D(("cannot change video standard while streaming capture is active\n"));
1078 return -EBUSY;
1079 }
1080
1081 if ((vv->video_status & STATUS_OVERLAY) != 0) {
1082 vv->ov_suspend = vv->video_fh;
1083 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
1084 if (0 != err) {
1085 DEB_D(("suspending video failed. aborting\n"));
1086 return err;
1087 }
1088 }
1089
3593cab5 1090 mutex_lock(&dev->lock);
1da177e4
LT		 1091
1092 for(i = 0; i < dev->ext_vv_data->num_stds; i++)
1093 if (*id & dev->ext_vv_data->stds[i].id)
1094 break;
1095 if (i != dev->ext_vv_data->num_stds) {
1096 vv->standard = &dev->ext_vv_data->stds[i];
1097 if( NULL != dev->ext_vv_data->std_callback )
1098 dev->ext_vv_data->std_callback(dev, vv->standard);
1099 found = 1;
1100 }
1101
3593cab5 1102 mutex_unlock(&dev->lock);
1da177e4
LT		 1103
1104 if (vv->ov_suspend != NULL) {
1105 saa7146_start_preview(vv->ov_suspend);
1106 vv->ov_suspend = NULL;
1107 }
1108
1109 if( 0 == found ) {
1110 DEB_EE(("VIDIOC_S_STD: standard not found.\n"));
1111 return -EINVAL;
1112 }
1113
1114 DEB_EE(("VIDIOC_S_STD: set to standard to '%s'\n",vv->standard->name));
1115 return 0;
1116 }
1117 case VIDIOC_OVERLAY:
1da177e4
LT		 1118 {
1119 int on = *(int *)arg;
1da177e4
LT		 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 }
c3ab204c 1191#ifdef CONFIG_VIDEO_V4L1_COMPAT
1da177e4
LT		 1192 case VIDIOCGMBUF:
1193 {
1194 struct video_mbuf *mbuf = arg;
1da177e4
LT		 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;
1da177e4
LT		 1204 err = videobuf_mmap_setup(q,gbuffers,gbufsize,
1205 V4L2_MEMORY_MMAP);
820eacd8 1206 if (err < 0)
1da177e4 1207 return err;
49ee718e
BP		 1208
1209 gbuffers = err;
1da177e4
LT		 1210 memset(mbuf,0,sizeof(*mbuf));
1211 mbuf->frames = gbuffers;
1212 mbuf->size = gbuffers * gbufsize;
1213 for (i = 0; i < gbuffers; i++)
1214 mbuf->offsets[i] = i * gbufsize;
1da177e4
LT		 1215 return 0;
1216 }
c3ab204c 1217#endif
1da177e4 1218 default:
b1f88407 1219 return v4l_compat_translate_ioctl(file, cmd, arg,
f473bf76 1220 saa7146_video_do_ioctl);
1da177e4
LT		 1221 }
1222 return 0;
1223}
1224
1225/*********************************************************************************/
1226/* buffer handling functions */
1227
1228static int buffer_activate (struct saa7146_dev *dev,
1229 struct saa7146_buf *buf,
1230 struct saa7146_buf *next)
1231{
1232 struct saa7146_vv *vv = dev->vv_data;
1233
0fc0686e 1234 buf->vb.state = VIDEOBUF_ACTIVE;
1da177e4
LT		 1235 saa7146_set_capture(dev,buf,next);
1236
1237 mod_timer(&vv->video_q.timeout, jiffies+BUFFER_TIMEOUT);
1238 return 0;
1239}
1240
1241static int buffer_prepare(struct videobuf_queue *q,
1242 struct videobuf_buffer *vb, enum v4l2_field field)
1243{
1244 struct file *file = q->priv_data;
1245 struct saa7146_fh *fh = file->private_data;
1246 struct saa7146_dev *dev = fh->dev;
1247 struct saa7146_vv *vv = dev->vv_data;
1248 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1249 int size,err = 0;
1250
1251 DEB_CAP(("vbuf:%p\n",vb));
1252
1253 /* sanity checks */
1254 if (fh->video_fmt.width < 48 ||
1255 fh->video_fmt.height < 32 ||
1256 fh->video_fmt.width > vv->standard->h_max_out ||
1257 fh->video_fmt.height > vv->standard->v_max_out) {
1258 DEB_D(("w (%d) / h (%d) out of bounds.\n",fh->video_fmt.width,fh->video_fmt.height));
1259 return -EINVAL;
1260 }
1261
1262 size = fh->video_fmt.sizeimage;
1263 if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1264 DEB_D(("size mismatch.\n"));
1265 return -EINVAL;
1266 }
1267
1268 DEB_CAP(("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1269 fh->video_fmt.width,fh->video_fmt.height,size,v4l2_field_names[fh->video_fmt.field]));
1270 if (buf->vb.width != fh->video_fmt.width ||
1271 buf->vb.bytesperline != fh->video_fmt.bytesperline ||
1272 buf->vb.height != fh->video_fmt.height ||
1273 buf->vb.size != size ||
1274 buf->vb.field != field ||
1275 buf->vb.field != fh->video_fmt.field ||
1276 buf->fmt != &fh->video_fmt) {
c7b0ac05 1277 saa7146_dma_free(dev,q,buf);
1da177e4
LT		 1278 }
1279
0fc0686e 1280 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1da177e4
LT		 1281 struct saa7146_format *sfmt;
1282
1283 buf->vb.bytesperline = fh->video_fmt.bytesperline;
1284 buf->vb.width = fh->video_fmt.width;
1285 buf->vb.height = fh->video_fmt.height;
1286 buf->vb.size = size;
1287 buf->vb.field = field;
1288 buf->fmt = &fh->video_fmt;
1289 buf->vb.field = fh->video_fmt.field;
1290
1291 sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
1292
1293 if( 0 != IS_PLANAR(sfmt->trans)) {
1294 saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1295 saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1296 saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1297
1298 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1299 saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1300 saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1301 } else {
1302 saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1303 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1304 }
1305
c7b0ac05 1306 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1da177e4
LT		 1307 if (err)
1308 goto oops;
1309 err = saa7146_pgtable_build(dev,buf);
1310 if (err)
1311 goto oops;
1312 }
0fc0686e 1313 buf->vb.state = VIDEOBUF_PREPARED;
1da177e4
LT		 1314 buf->activate = buffer_activate;
1315
1316 return 0;
1317
1318 oops:
1319 DEB_D(("error out.\n"));
c7b0ac05 1320 saa7146_dma_free(dev,q,buf);
1da177e4
LT		 1321
1322 return err;
1323}
1324
1325static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1326{
1327 struct file *file = q->priv_data;
1328 struct saa7146_fh *fh = file->private_data;
1329
1330 if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1331 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1332
1333 *size = fh->video_fmt.sizeimage;
1334
1335 /* check if we exceed the "max_memory" parameter */
1336 if( (*count * *size) > (max_memory*1048576) ) {
1337 *count = (max_memory*1048576) / *size;
1338 }
1339
1340 DEB_CAP(("%d buffers, %d bytes each.\n",*count,*size));
1341
1342 return 0;
1343}
1344
1345static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1346{
1347 struct file *file = q->priv_data;
1348 struct saa7146_fh *fh = file->private_data;
1349 struct saa7146_dev *dev = fh->dev;
1350 struct saa7146_vv *vv = dev->vv_data;
1351 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1352
1353 DEB_CAP(("vbuf:%p\n",vb));
1354 saa7146_buffer_queue(fh->dev,&vv->video_q,buf);
1355}
1356
1da177e4
LT		 1357static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1358{
1359 struct file *file = q->priv_data;
1360 struct saa7146_fh *fh = file->private_data;
1361 struct saa7146_dev *dev = fh->dev;
1362 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1363
1364 DEB_CAP(("vbuf:%p\n",vb));
c7b0ac05 1365 saa7146_dma_free(dev,q,buf);
1da177e4
LT		 1366}
1367
1368static struct videobuf_queue_ops video_qops = {
1369 .buf_setup = buffer_setup,
1370 .buf_prepare = buffer_prepare,
1371 .buf_queue = buffer_queue,
1372 .buf_release = buffer_release,
1373};
1374
1375/********************************************************************************/
1376/* file operations */
1377
1378static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1379{
afd1a0c9 1380 INIT_LIST_HEAD(&vv->video_q.queue);
1da177e4
LT		 1381
1382 init_timer(&vv->video_q.timeout);
1383 vv->video_q.timeout.function = saa7146_buffer_timeout;
1384 vv->video_q.timeout.data = (unsigned long)(&vv->video_q);
1385 vv->video_q.dev = dev;
1386
1387 /* set some default values */
1388 vv->standard = &dev->ext_vv_data->stds[0];
1389
1390 /* FIXME: what's this? */
1391 vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1392 vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1393}
1394
1395
1396static int video_open(struct saa7146_dev *dev, struct file *file)
1397{
1398 struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1399 struct saa7146_format *sfmt;
1400
1401 fh->video_fmt.width = 384;
1402 fh->video_fmt.height = 288;
1403 fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24;
1404 fh->video_fmt.bytesperline = 0;
1405 fh->video_fmt.field = V4L2_FIELD_ANY;
1406 sfmt = format_by_fourcc(dev,fh->video_fmt.pixelformat);
1407 fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8;
1408
0705135e
GL		 1409 videobuf_queue_sg_init(&fh->video_q, &video_qops,
1410 &dev->pci->dev, &dev->slock,
1da177e4
LT		 1411 V4L2_BUF_TYPE_VIDEO_CAPTURE,
1412 V4L2_FIELD_INTERLACED,
1413 sizeof(struct saa7146_buf),
1414 file);
1415
1da177e4
LT		 1416 return 0;
1417}
1418
1419
1420static void video_close(struct saa7146_dev *dev, struct file *file)
1421{
1422 struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
1423 struct saa7146_vv *vv = dev->vv_data;
2970c492 1424 struct videobuf_queue *q = &fh->video_q;
1da177e4
LT		 1425 int err;
1426
1427 if (IS_CAPTURE_ACTIVE(fh) != 0) {
1428 err = video_end(fh, file);
1429 } else if (IS_OVERLAY_ACTIVE(fh) != 0) {
1430 err = saa7146_stop_preview(fh);
1431 }
1432
19bc5133 1433 videobuf_stop(q);
2970c492 1434
1da177e4
LT		 1435 /* hmm, why is this function declared void? */
1436 /* return err */
1437}
1438
1439
1440static 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 ) {
0fc0686e 1450 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1da177e4
LT		 1451 }
1452 saa7146_buffer_next(dev,q,0);
1453
1454 spin_unlock(&dev->slock);
1455}
1456
1457static 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 }
1488out:
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
1498struct 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};
Linux kernel - Deliverables
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