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Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / media / common / saa7146_video.c
blobce30533fd9724e1f802ecb6f67a6e6f42f998a65
1 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
2
3 #include <media/saa7146_vv.h>
4 #include <media/v4l2-chip-ident.h>
5 #include <linux/module.h>
6
7 static int max_memory = 32;
8
9 module_param(max_memory, int, 0644);
10 MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)");
11
12 #define IS_CAPTURE_ACTIVE(fh) \
13 (((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh))
14
15 #define IS_OVERLAY_ACTIVE(fh) \
16 (((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh))
17
18 /* format descriptions for capture and preview */
19 static struct saa7146_format formats[] = {
20 {
21 .name = "RGB-8 (3-3-2)",
22 .pixelformat = V4L2_PIX_FMT_RGB332,
23 .trans = RGB08_COMPOSED,
24 .depth = 8,
25 .flags = 0,
26 }, {
27 .name = "RGB-16 (5/B-6/G-5/R)",
28 .pixelformat = V4L2_PIX_FMT_RGB565,
29 .trans = RGB16_COMPOSED,
30 .depth = 16,
31 .flags = 0,
32 }, {
33 .name = "RGB-24 (B-G-R)",
34 .pixelformat = V4L2_PIX_FMT_BGR24,
35 .trans = RGB24_COMPOSED,
36 .depth = 24,
37 .flags = 0,
38 }, {
39 .name = "RGB-32 (B-G-R)",
40 .pixelformat = V4L2_PIX_FMT_BGR32,
41 .trans = RGB32_COMPOSED,
42 .depth = 32,
43 .flags = 0,
44 }, {
45 .name = "RGB-32 (R-G-B)",
46 .pixelformat = V4L2_PIX_FMT_RGB32,
47 .trans = RGB32_COMPOSED,
48 .depth = 32,
49 .flags = 0,
50 .swap = 0x2,
51 }, {
52 .name = "Greyscale-8",
53 .pixelformat = V4L2_PIX_FMT_GREY,
54 .trans = Y8,
55 .depth = 8,
56 .flags = 0,
57 }, {
58 .name = "YUV 4:2:2 planar (Y-Cb-Cr)",
59 .pixelformat = V4L2_PIX_FMT_YUV422P,
60 .trans = YUV422_DECOMPOSED,
61 .depth = 16,
62 .flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
63 }, {
64 .name = "YVU 4:2:0 planar (Y-Cb-Cr)",
65 .pixelformat = V4L2_PIX_FMT_YVU420,
66 .trans = YUV420_DECOMPOSED,
67 .depth = 12,
68 .flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
69 }, {
70 .name = "YUV 4:2:0 planar (Y-Cb-Cr)",
71 .pixelformat = V4L2_PIX_FMT_YUV420,
72 .trans = YUV420_DECOMPOSED,
73 .depth = 12,
74 .flags = FORMAT_IS_PLANAR,
75 }, {
76 .name = "YUV 4:2:2 (U-Y-V-Y)",
77 .pixelformat = V4L2_PIX_FMT_UYVY,
78 .trans = YUV422_COMPOSED,
79 .depth = 16,
80 .flags = 0,
81 }
82 };
83
84 /* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps.
85 due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped
86 (like V4L2_PIX_FMT_YUYV) ... 8-( */
87
88 static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
89
90 struct saa7146_format* saa7146_format_by_fourcc(struct saa7146_dev *dev, int fourcc)
91 {
92 int i, j = NUM_FORMATS;
93
94 for (i = 0; i < j; i++) {
95 if (formats[i].pixelformat == fourcc) {
96 return formats+i;
97 }
98 }
99
100 DEB_D("unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
101 return NULL;
102 }
103
104 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f);
105
106 int saa7146_start_preview(struct saa7146_fh *fh)
107 {
108 struct saa7146_dev *dev = fh->dev;
109 struct saa7146_vv *vv = dev->vv_data;
110 struct v4l2_format fmt;
111 int ret = 0, err = 0;
112
113 DEB_EE("dev:%p, fh:%p\n", dev, fh);
114
115 /* check if we have overlay informations */
116 if( NULL == fh->ov.fh ) {
117 DEB_D("no overlay data available. try S_FMT first.\n");
118 return -EAGAIN;
119 }
120
121 /* check if streaming capture is running */
122 if (IS_CAPTURE_ACTIVE(fh) != 0) {
123 DEB_D("streaming capture is active\n");
124 return -EBUSY;
125 }
126
127 /* check if overlay is running */
128 if (IS_OVERLAY_ACTIVE(fh) != 0) {
129 if (vv->video_fh == fh) {
130 DEB_D("overlay is already active\n");
131 return 0;
132 }
133 DEB_D("overlay is already active in another open\n");
134 return -EBUSY;
135 }
136
137 if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
138 DEB_D("cannot get necessary overlay resources\n");
139 return -EBUSY;
140 }
141
142 fmt.fmt.win = fh->ov.win;
143 err = vidioc_try_fmt_vid_overlay(NULL, fh, &fmt);
144 if (0 != err) {
145 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
146 return -EBUSY;
147 }
148 fh->ov.win = fmt.fmt.win;
149 vv->ov_data = &fh->ov;
150
151 DEB_D("%dx%d+%d+%d %s field=%s\n",
152 fh->ov.win.w.width, fh->ov.win.w.height,
153 fh->ov.win.w.left, fh->ov.win.w.top,
154 vv->ov_fmt->name, v4l2_field_names[fh->ov.win.field]);
155
156 if (0 != (ret = saa7146_enable_overlay(fh))) {
157 DEB_D("enabling overlay failed: %d\n", ret);
158 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
159 return ret;
160 }
161
162 vv->video_status = STATUS_OVERLAY;
163 vv->video_fh = fh;
164
165 return 0;
166 }
167 EXPORT_SYMBOL_GPL(saa7146_start_preview);
168
169 int saa7146_stop_preview(struct saa7146_fh *fh)
170 {
171 struct saa7146_dev *dev = fh->dev;
172 struct saa7146_vv *vv = dev->vv_data;
173
174 DEB_EE("dev:%p, fh:%p\n", dev, fh);
175
176 /* check if streaming capture is running */
177 if (IS_CAPTURE_ACTIVE(fh) != 0) {
178 DEB_D("streaming capture is active\n");
179 return -EBUSY;
180 }
181
182 /* check if overlay is running at all */
183 if ((vv->video_status & STATUS_OVERLAY) == 0) {
184 DEB_D("no active overlay\n");
185 return 0;
186 }
187
188 if (vv->video_fh != fh) {
189 DEB_D("overlay is active, but in another open\n");
190 return -EBUSY;
191 }
192
193 vv->video_status = 0;
194 vv->video_fh = NULL;
195
196 saa7146_disable_overlay(fh);
197
198 saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
199
200 return 0;
201 }
202 EXPORT_SYMBOL_GPL(saa7146_stop_preview);
203
204 /********************************************************************************/
205 /* device controls */
206
207 static struct v4l2_queryctrl controls[] = {
208 {
209 .id = V4L2_CID_BRIGHTNESS,
210 .name = "Brightness",
211 .minimum = 0,
212 .maximum = 255,
213 .step = 1,
214 .default_value = 128,
215 .type = V4L2_CTRL_TYPE_INTEGER,
216 .flags = V4L2_CTRL_FLAG_SLIDER,
217 },{
218 .id = V4L2_CID_CONTRAST,
219 .name = "Contrast",
220 .minimum = 0,
221 .maximum = 127,
222 .step = 1,
223 .default_value = 64,
224 .type = V4L2_CTRL_TYPE_INTEGER,
225 .flags = V4L2_CTRL_FLAG_SLIDER,
226 },{
227 .id = V4L2_CID_SATURATION,
228 .name = "Saturation",
229 .minimum = 0,
230 .maximum = 127,
231 .step = 1,
232 .default_value = 64,
233 .type = V4L2_CTRL_TYPE_INTEGER,
234 .flags = V4L2_CTRL_FLAG_SLIDER,
235 },{
236 .id = V4L2_CID_VFLIP,
237 .name = "Vertical Flip",
238 .minimum = 0,
239 .maximum = 1,
240 .type = V4L2_CTRL_TYPE_BOOLEAN,
241 },{
242 .id = V4L2_CID_HFLIP,
243 .name = "Horizontal Flip",
244 .minimum = 0,
245 .maximum = 1,
246 .type = V4L2_CTRL_TYPE_BOOLEAN,
247 },
248 };
249 static int NUM_CONTROLS = sizeof(controls)/sizeof(struct v4l2_queryctrl);
250
251 #define V4L2_CID_PRIVATE_LASTP1 (V4L2_CID_PRIVATE_BASE + 0)
252
253 static struct v4l2_queryctrl* ctrl_by_id(int id)
254 {
255 int i;
256
257 for (i = 0; i < NUM_CONTROLS; i++)
258 if (controls[i].id == id)
259 return controls+i;
260 return NULL;
261 }
262
263 /********************************************************************************/
264 /* common pagetable functions */
265
266 static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
267 {
268 struct pci_dev *pci = dev->pci;
269 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
270 struct scatterlist *list = dma->sglist;
271 int length = dma->sglen;
272 struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
273
274 DEB_EE("dev:%p, buf:%p, sg_len:%d\n", dev, buf, length);
275
276 if( 0 != IS_PLANAR(sfmt->trans)) {
277 struct saa7146_pgtable *pt1 = &buf->pt[0];
278 struct saa7146_pgtable *pt2 = &buf->pt[1];
279 struct saa7146_pgtable *pt3 = &buf->pt[2];
280 __le32 *ptr1, *ptr2, *ptr3;
281 __le32 fill;
282
283 int size = buf->fmt->width*buf->fmt->height;
284 int i,p,m1,m2,m3,o1,o2;
285
286 switch( sfmt->depth ) {
287 case 12: {
288 /* create some offsets inside the page table */
289 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
290 m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
291 m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
292 o1 = size%PAGE_SIZE;
293 o2 = (size+(size/4))%PAGE_SIZE;
294 DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",
295 size, m1, m2, m3, o1, o2);
296 break;
297 }
298 case 16: {
299 /* create some offsets inside the page table */
300 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
301 m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
302 m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
303 o1 = size%PAGE_SIZE;
304 o2 = (size+(size/2))%PAGE_SIZE;
305 DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",
306 size, m1, m2, m3, o1, o2);
307 break;
308 }
309 default: {
310 return -1;
311 }
312 }
313
314 ptr1 = pt1->cpu;
315 ptr2 = pt2->cpu;
316 ptr3 = pt3->cpu;
317
318 /* walk all pages, copy all page addresses to ptr1 */
319 for (i = 0; i < length; i++, list++) {
320 for (p = 0; p * 4096 < list->length; p++, ptr1++) {
321 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
322 }
323 }
324 /*
325 ptr1 = pt1->cpu;
326 for(j=0;j<40;j++) {
327 printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
328 }
329 */
330
331 /* if we have a user buffer, the first page may not be
332 aligned to a page boundary. */
333 pt1->offset = dma->sglist->offset;
334 pt2->offset = pt1->offset+o1;
335 pt3->offset = pt1->offset+o2;
336
337 /* create video-dma2 page table */
338 ptr1 = pt1->cpu;
339 for(i = m1; i <= m2 ; i++, ptr2++) {
340 *ptr2 = ptr1[i];
341 }
342 fill = *(ptr2-1);
343 for(;i<1024;i++,ptr2++) {
344 *ptr2 = fill;
345 }
346 /* create video-dma3 page table */
347 ptr1 = pt1->cpu;
348 for(i = m2; i <= m3; i++,ptr3++) {
349 *ptr3 = ptr1[i];
350 }
351 fill = *(ptr3-1);
352 for(;i<1024;i++,ptr3++) {
353 *ptr3 = fill;
354 }
355 /* finally: finish up video-dma1 page table */
356 ptr1 = pt1->cpu+m1;
357 fill = pt1->cpu[m1];
358 for(i=m1;i<1024;i++,ptr1++) {
359 *ptr1 = fill;
360 }
361 /*
362 ptr1 = pt1->cpu;
363 ptr2 = pt2->cpu;
364 ptr3 = pt3->cpu;
365 for(j=0;j<40;j++) {
366 printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
367 }
368 for(j=0;j<40;j++) {
369 printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
370 }
371 for(j=0;j<40;j++) {
372 printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
373 }
374 */
375 } else {
376 struct saa7146_pgtable *pt = &buf->pt[0];
377 return saa7146_pgtable_build_single(pci, pt, list, length);
378 }
379
380 return 0;
381 }
382
383
384 /********************************************************************************/
385 /* file operations */
386
387 static int video_begin(struct saa7146_fh *fh)
388 {
389 struct saa7146_dev *dev = fh->dev;
390 struct saa7146_vv *vv = dev->vv_data;
391 struct saa7146_format *fmt = NULL;
392 unsigned int resource;
393 int ret = 0, err = 0;
394
395 DEB_EE("dev:%p, fh:%p\n", dev, fh);
396
397 if ((vv->video_status & STATUS_CAPTURE) != 0) {
398 if (vv->video_fh == fh) {
399 DEB_S("already capturing\n");
400 return 0;
401 }
402 DEB_S("already capturing in another open\n");
403 return -EBUSY;
404 }
405
406 if ((vv->video_status & STATUS_OVERLAY) != 0) {
407 DEB_S("warning: suspending overlay video for streaming capture\n");
408 vv->ov_suspend = vv->video_fh;
409 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
410 if (0 != err) {
411 DEB_D("suspending video failed. aborting\n");
412 return err;
413 }
414 }
415
416 fmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat);
417 /* we need to have a valid format set here */
418 BUG_ON(NULL == fmt);
419
420 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
421 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
422 } else {
423 resource = RESOURCE_DMA1_HPS;
424 }
425
426 ret = saa7146_res_get(fh, resource);
427 if (0 == ret) {
428 DEB_S("cannot get capture resource %d\n", resource);
429 if (vv->ov_suspend != NULL) {
430 saa7146_start_preview(vv->ov_suspend);
431 vv->ov_suspend = NULL;
432 }
433 return -EBUSY;
434 }
435
436 /* clear out beginning of streaming bit (rps register 0)*/
437 saa7146_write(dev, MC2, MASK_27 );
438
439 /* enable rps0 irqs */
440 SAA7146_IER_ENABLE(dev, MASK_27);
441
442 vv->video_fh = fh;
443 vv->video_status = STATUS_CAPTURE;
444
445 return 0;
446 }
447
448 static int video_end(struct saa7146_fh *fh, struct file *file)
449 {
450 struct saa7146_dev *dev = fh->dev;
451 struct saa7146_vv *vv = dev->vv_data;
452 struct saa7146_format *fmt = NULL;
453 unsigned long flags;
454 unsigned int resource;
455 u32 dmas = 0;
456 DEB_EE("dev:%p, fh:%p\n", dev, fh);
457
458 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
459 DEB_S("not capturing\n");
460 return 0;
461 }
462
463 if (vv->video_fh != fh) {
464 DEB_S("capturing, but in another open\n");
465 return -EBUSY;
466 }
467
468 fmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat);
469 /* we need to have a valid format set here */
470 BUG_ON(NULL == fmt);
471
472 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
473 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
474 dmas = MASK_22 | MASK_21 | MASK_20;
475 } else {
476 resource = RESOURCE_DMA1_HPS;
477 dmas = MASK_22;
478 }
479 spin_lock_irqsave(&dev->slock,flags);
480
481 /* disable rps0 */
482 saa7146_write(dev, MC1, MASK_28);
483
484 /* disable rps0 irqs */
485 SAA7146_IER_DISABLE(dev, MASK_27);
486
487 /* shut down all used video dma transfers */
488 saa7146_write(dev, MC1, dmas);
489
490 spin_unlock_irqrestore(&dev->slock, flags);
491
492 vv->video_fh = NULL;
493 vv->video_status = 0;
494
495 saa7146_res_free(fh, resource);
496
497 if (vv->ov_suspend != NULL) {
498 saa7146_start_preview(vv->ov_suspend);
499 vv->ov_suspend = NULL;
500 }
501
502 return 0;
503 }
504
505 static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
506 {
507 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
508
509 strcpy((char *)cap->driver, "saa7146 v4l2");
510 strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
511 sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci));
512 cap->version = SAA7146_VERSION_CODE;
513 cap->capabilities =
514 V4L2_CAP_VIDEO_CAPTURE |
515 V4L2_CAP_VIDEO_OVERLAY |
516 V4L2_CAP_READWRITE |
517 V4L2_CAP_STREAMING;
518 cap->capabilities |= dev->ext_vv_data->capabilities;
519 return 0;
520 }
521
522 static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
523 {
524 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
525 struct saa7146_vv *vv = dev->vv_data;
526
527 *fb = vv->ov_fb;
528 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
529 return 0;
530 }
531
532 static int vidioc_s_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
533 {
534 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
535 struct saa7146_vv *vv = dev->vv_data;
536 struct saa7146_format *fmt;
537
538 DEB_EE("VIDIOC_S_FBUF\n");
539
540 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
541 return -EPERM;
542
543 /* check args */
544 fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat);
545 if (NULL == fmt)
546 return -EINVAL;
547
548 /* planar formats are not allowed for overlay video, clipping and video dma would clash */
549 if (fmt->flags & FORMAT_IS_PLANAR)
550 DEB_S("planar pixelformat '%4.4s' not allowed for overlay\n",
551 (char *)&fmt->pixelformat);
552
553 /* check if overlay is running */
554 if (IS_OVERLAY_ACTIVE(fh) != 0) {
555 if (vv->video_fh != fh) {
556 DEB_D("refusing to change framebuffer informations while overlay is active in another open\n");
557 return -EBUSY;
558 }
559 }
560
561 /* ok, accept it */
562 vv->ov_fb = *fb;
563 vv->ov_fmt = fmt;
564
565 if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) {
566 vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8;
567 DEB_D("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline);
568 }
569 return 0;
570 }
571
572 static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
573 {
574 if (f->index >= NUM_FORMATS)
575 return -EINVAL;
576 strlcpy((char *)f->description, formats[f->index].name,
577 sizeof(f->description));
578 f->pixelformat = formats[f->index].pixelformat;
579 return 0;
580 }
581
582 static int vidioc_queryctrl(struct file *file, void *fh, struct v4l2_queryctrl *c)
583 {
584 const struct v4l2_queryctrl *ctrl;
585
586 if ((c->id < V4L2_CID_BASE ||
587 c->id >= V4L2_CID_LASTP1) &&
588 (c->id < V4L2_CID_PRIVATE_BASE ||
589 c->id >= V4L2_CID_PRIVATE_LASTP1))
590 return -EINVAL;
591
592 ctrl = ctrl_by_id(c->id);
593 if (ctrl == NULL)
594 return -EINVAL;
595
596 DEB_EE("VIDIOC_QUERYCTRL: id:%d\n", c->id);
597 *c = *ctrl;
598 return 0;
599 }
600
601 static int vidioc_g_ctrl(struct file *file, void *fh, struct v4l2_control *c)
602 {
603 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
604 struct saa7146_vv *vv = dev->vv_data;
605 const struct v4l2_queryctrl *ctrl;
606 u32 value = 0;
607
608 ctrl = ctrl_by_id(c->id);
609 if (NULL == ctrl)
610 return -EINVAL;
611 switch (c->id) {
612 case V4L2_CID_BRIGHTNESS:
613 value = saa7146_read(dev, BCS_CTRL);
614 c->value = 0xff & (value >> 24);
615 DEB_D("V4L2_CID_BRIGHTNESS: %d\n", c->value);
616 break;
617 case V4L2_CID_CONTRAST:
618 value = saa7146_read(dev, BCS_CTRL);
619 c->value = 0x7f & (value >> 16);
620 DEB_D("V4L2_CID_CONTRAST: %d\n", c->value);
621 break;
622 case V4L2_CID_SATURATION:
623 value = saa7146_read(dev, BCS_CTRL);
624 c->value = 0x7f & (value >> 0);
625 DEB_D("V4L2_CID_SATURATION: %d\n", c->value);
626 break;
627 case V4L2_CID_VFLIP:
628 c->value = vv->vflip;
629 DEB_D("V4L2_CID_VFLIP: %d\n", c->value);
630 break;
631 case V4L2_CID_HFLIP:
632 c->value = vv->hflip;
633 DEB_D("V4L2_CID_HFLIP: %d\n", c->value);
634 break;
635 default:
636 return -EINVAL;
637 }
638 return 0;
639 }
640
641 static int vidioc_s_ctrl(struct file *file, void *fh, struct v4l2_control *c)
642 {
643 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
644 struct saa7146_vv *vv = dev->vv_data;
645 const struct v4l2_queryctrl *ctrl;
646
647 ctrl = ctrl_by_id(c->id);
648 if (NULL == ctrl) {
649 DEB_D("unknown control %d\n", c->id);
650 return -EINVAL;
651 }
652
653 switch (ctrl->type) {
654 case V4L2_CTRL_TYPE_BOOLEAN:
655 case V4L2_CTRL_TYPE_MENU:
656 case V4L2_CTRL_TYPE_INTEGER:
657 if (c->value < ctrl->minimum)
658 c->value = ctrl->minimum;
659 if (c->value > ctrl->maximum)
660 c->value = ctrl->maximum;
661 break;
662 default:
663 /* nothing */;
664 }
665
666 switch (c->id) {
667 case V4L2_CID_BRIGHTNESS: {
668 u32 value = saa7146_read(dev, BCS_CTRL);
669 value &= 0x00ffffff;
670 value |= (c->value << 24);
671 saa7146_write(dev, BCS_CTRL, value);
672 saa7146_write(dev, MC2, MASK_22 | MASK_06);
673 break;
674 }
675 case V4L2_CID_CONTRAST: {
676 u32 value = saa7146_read(dev, BCS_CTRL);
677 value &= 0xff00ffff;
678 value |= (c->value << 16);
679 saa7146_write(dev, BCS_CTRL, value);
680 saa7146_write(dev, MC2, MASK_22 | MASK_06);
681 break;
682 }
683 case V4L2_CID_SATURATION: {
684 u32 value = saa7146_read(dev, BCS_CTRL);
685 value &= 0xffffff00;
686 value |= (c->value << 0);
687 saa7146_write(dev, BCS_CTRL, value);
688 saa7146_write(dev, MC2, MASK_22 | MASK_06);
689 break;
690 }
691 case V4L2_CID_HFLIP:
692 /* fixme: we can support changing VFLIP and HFLIP here... */
693 if (IS_CAPTURE_ACTIVE(fh) != 0) {
694 DEB_D("V4L2_CID_HFLIP while active capture\n");
695 return -EBUSY;
696 }
697 vv->hflip = c->value;
698 break;
699 case V4L2_CID_VFLIP:
700 if (IS_CAPTURE_ACTIVE(fh) != 0) {
701 DEB_D("V4L2_CID_VFLIP while active capture\n");
702 return -EBUSY;
703 }
704 vv->vflip = c->value;
705 break;
706 default:
707 return -EINVAL;
708 }
709
710 if (IS_OVERLAY_ACTIVE(fh) != 0) {
711 saa7146_stop_preview(fh);
712 saa7146_start_preview(fh);
713 }
714 return 0;
715 }
716
717 static int vidioc_g_parm(struct file *file, void *fh,
718 struct v4l2_streamparm *parm)
719 {
720 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
721 struct saa7146_vv *vv = dev->vv_data;
722
723 parm->parm.capture.readbuffers = 1;
724 v4l2_video_std_frame_period(vv->standard->id,
725 &parm->parm.capture.timeperframe);
726 return 0;
727 }
728
729 static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
730 {
731 f->fmt.pix = ((struct saa7146_fh *)fh)->video_fmt;
732 return 0;
733 }
734
735 static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
736 {
737 f->fmt.win = ((struct saa7146_fh *)fh)->ov.win;
738 return 0;
739 }
740
741 static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f)
742 {
743 f->fmt.vbi = ((struct saa7146_fh *)fh)->vbi_fmt;
744 return 0;
745 }
746
747 static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
748 {
749 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
750 struct saa7146_vv *vv = dev->vv_data;
751 struct saa7146_format *fmt;
752 enum v4l2_field field;
753 int maxw, maxh;
754 int calc_bpl;
755
756 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
757
758 fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat);
759 if (NULL == fmt)
760 return -EINVAL;
761
762 field = f->fmt.pix.field;
763 maxw = vv->standard->h_max_out;
764 maxh = vv->standard->v_max_out;
765
766 if (V4L2_FIELD_ANY == field) {
767 field = (f->fmt.pix.height > maxh / 2)
768 ? V4L2_FIELD_INTERLACED
769 : V4L2_FIELD_BOTTOM;
770 }
771 switch (field) {
772 case V4L2_FIELD_ALTERNATE:
773 vv->last_field = V4L2_FIELD_TOP;
774 maxh = maxh / 2;
775 break;
776 case V4L2_FIELD_TOP:
777 case V4L2_FIELD_BOTTOM:
778 vv->last_field = V4L2_FIELD_INTERLACED;
779 maxh = maxh / 2;
780 break;
781 case V4L2_FIELD_INTERLACED:
782 vv->last_field = V4L2_FIELD_INTERLACED;
783 break;
784 default:
785 DEB_D("no known field mode '%d'\n", field);
786 return -EINVAL;
787 }
788
789 f->fmt.pix.field = field;
790 if (f->fmt.pix.width > maxw)
791 f->fmt.pix.width = maxw;
792 if (f->fmt.pix.height > maxh)
793 f->fmt.pix.height = maxh;
794
795 calc_bpl = (f->fmt.pix.width * fmt->depth) / 8;
796
797 if (f->fmt.pix.bytesperline < calc_bpl)
798 f->fmt.pix.bytesperline = calc_bpl;
799
800 if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */
801 f->fmt.pix.bytesperline = calc_bpl;
802
803 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
804 DEB_D("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n",
805 f->fmt.pix.width, f->fmt.pix.height,
806 f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
807
808 return 0;
809 }
810
811
812 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
813 {
814 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
815 struct saa7146_vv *vv = dev->vv_data;
816 struct v4l2_window *win = &f->fmt.win;
817 enum v4l2_field field;
818 int maxw, maxh;
819
820 DEB_EE("dev:%p\n", dev);
821
822 if (NULL == vv->ov_fb.base) {
823 DEB_D("no fb base set\n");
824 return -EINVAL;
825 }
826 if (NULL == vv->ov_fmt) {
827 DEB_D("no fb fmt set\n");
828 return -EINVAL;
829 }
830 if (win->w.width < 48 || win->w.height < 32) {
831 DEB_D("min width/height. (%d,%d)\n",
832 win->w.width, win->w.height);
833 return -EINVAL;
834 }
835 if (win->clipcount > 16) {
836 DEB_D("clipcount too big\n");
837 return -EINVAL;
838 }
839
840 field = win->field;
841 maxw = vv->standard->h_max_out;
842 maxh = vv->standard->v_max_out;
843
844 if (V4L2_FIELD_ANY == field) {
845 field = (win->w.height > maxh / 2)
846 ? V4L2_FIELD_INTERLACED
847 : V4L2_FIELD_TOP;
848 }
849 switch (field) {
850 case V4L2_FIELD_TOP:
851 case V4L2_FIELD_BOTTOM:
852 case V4L2_FIELD_ALTERNATE:
853 maxh = maxh / 2;
854 break;
855 case V4L2_FIELD_INTERLACED:
856 break;
857 default:
858 DEB_D("no known field mode '%d'\n", field);
859 return -EINVAL;
860 }
861
862 win->field = field;
863 if (win->w.width > maxw)
864 win->w.width = maxw;
865 if (win->w.height > maxh)
866 win->w.height = maxh;
867
868 return 0;
869 }
870
871 static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f)
872 {
873 struct saa7146_fh *fh = __fh;
874 struct saa7146_dev *dev = fh->dev;
875 struct saa7146_vv *vv = dev->vv_data;
876 int err;
877
878 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
879 if (IS_CAPTURE_ACTIVE(fh) != 0) {
880 DEB_EE("streaming capture is active\n");
881 return -EBUSY;
882 }
883 err = vidioc_try_fmt_vid_cap(file, fh, f);
884 if (0 != err)
885 return err;
886 fh->video_fmt = f->fmt.pix;
887 DEB_EE("set to pixelformat '%4.4s'\n",
888 (char *)&fh->video_fmt.pixelformat);
889 return 0;
890 }
891
892 static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f)
893 {
894 struct saa7146_fh *fh = __fh;
895 struct saa7146_dev *dev = fh->dev;
896 struct saa7146_vv *vv = dev->vv_data;
897 int err;
898
899 DEB_EE("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh);
900 err = vidioc_try_fmt_vid_overlay(file, fh, f);
901 if (0 != err)
902 return err;
903 fh->ov.win = f->fmt.win;
904 fh->ov.nclips = f->fmt.win.clipcount;
905 if (fh->ov.nclips > 16)
906 fh->ov.nclips = 16;
907 if (copy_from_user(fh->ov.clips, f->fmt.win.clips,
908 sizeof(struct v4l2_clip) * fh->ov.nclips)) {
909 return -EFAULT;
910 }
911
912 /* fh->ov.fh is used to indicate that we have valid overlay informations, too */
913 fh->ov.fh = fh;
914
915 /* check if our current overlay is active */
916 if (IS_OVERLAY_ACTIVE(fh) != 0) {
917 saa7146_stop_preview(fh);
918 saa7146_start_preview(fh);
919 }
920 return 0;
921 }
922
923 static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm)
924 {
925 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
926 struct saa7146_vv *vv = dev->vv_data;
927
928 *norm = vv->standard->id;
929 return 0;
930 }
931
932 /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
933 PAL / NTSC / SECAM. if your hardware does not (or does more)
934 -- override this function in your extension */
935 /*
936 case VIDIOC_ENUMSTD:
937 {
938 struct v4l2_standard *e = arg;
939 if (e->index < 0 )
940 return -EINVAL;
941 if( e->index < dev->ext_vv_data->num_stds ) {
942 DEB_EE("VIDIOC_ENUMSTD: index:%d\n", e->index);
943 v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
944 return 0;
945 }
946 return -EINVAL;
947 }
948 */
949
950 static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id *id)
951 {
952 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
953 struct saa7146_vv *vv = dev->vv_data;
954 int found = 0;
955 int err, i;
956
957 DEB_EE("VIDIOC_S_STD\n");
958
959 if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
960 DEB_D("cannot change video standard while streaming capture is active\n");
961 return -EBUSY;
962 }
963
964 if ((vv->video_status & STATUS_OVERLAY) != 0) {
965 vv->ov_suspend = vv->video_fh;
966 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
967 if (0 != err) {
968 DEB_D("suspending video failed. aborting\n");
969 return err;
970 }
971 }
972
973 for (i = 0; i < dev->ext_vv_data->num_stds; i++)
974 if (*id & dev->ext_vv_data->stds[i].id)
975 break;
976 if (i != dev->ext_vv_data->num_stds) {
977 vv->standard = &dev->ext_vv_data->stds[i];
978 if (NULL != dev->ext_vv_data->std_callback)
979 dev->ext_vv_data->std_callback(dev, vv->standard);
980 found = 1;
981 }
982
983 if (vv->ov_suspend != NULL) {
984 saa7146_start_preview(vv->ov_suspend);
985 vv->ov_suspend = NULL;
986 }
987
988 if (!found) {
989 DEB_EE("VIDIOC_S_STD: standard not found\n");
990 return -EINVAL;
991 }
992
993 DEB_EE("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name);
994 return 0;
995 }
996
997 static int vidioc_overlay(struct file *file, void *fh, unsigned int on)
998 {
999 int err;
1000
1001 DEB_D("VIDIOC_OVERLAY on:%d\n", on);
1002 if (on)
1003 err = saa7146_start_preview(fh);
1004 else
1005 err = saa7146_stop_preview(fh);
1006 return err;
1007 }
1008
1009 static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b)
1010 {
1011 struct saa7146_fh *fh = __fh;
1012
1013 if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1014 return videobuf_reqbufs(&fh->video_q, b);
1015 if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1016 return videobuf_reqbufs(&fh->vbi_q, b);
1017 return -EINVAL;
1018 }
1019
1020 static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1021 {
1022 struct saa7146_fh *fh = __fh;
1023
1024 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1025 return videobuf_querybuf(&fh->video_q, buf);
1026 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1027 return videobuf_querybuf(&fh->vbi_q, buf);
1028 return -EINVAL;
1029 }
1030
1031 static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1032 {
1033 struct saa7146_fh *fh = __fh;
1034
1035 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1036 return videobuf_qbuf(&fh->video_q, buf);
1037 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1038 return videobuf_qbuf(&fh->vbi_q, buf);
1039 return -EINVAL;
1040 }
1041
1042 static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
1043 {
1044 struct saa7146_fh *fh = __fh;
1045
1046 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1047 return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK);
1048 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1049 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK);
1050 return -EINVAL;
1051 }
1052
1053 static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
1054 {
1055 struct saa7146_fh *fh = __fh;
1056 int err;
1057
1058 DEB_D("VIDIOC_STREAMON, type:%d\n", type);
1059
1060 err = video_begin(fh);
1061 if (err)
1062 return err;
1063 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1064 return videobuf_streamon(&fh->video_q);
1065 if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1066 return videobuf_streamon(&fh->vbi_q);
1067 return -EINVAL;
1068 }
1069
1070 static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
1071 {
1072 struct saa7146_fh *fh = __fh;
1073 struct saa7146_dev *dev = fh->dev;
1074 struct saa7146_vv *vv = dev->vv_data;
1075 int err;
1076
1077 DEB_D("VIDIOC_STREAMOFF, type:%d\n", type);
1078
1079 /* ugly: we need to copy some checks from video_end(),
1080 because videobuf_streamoff() relies on the capture running.
1081 check and fix this */
1082 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
1083 DEB_S("not capturing\n");
1084 return 0;
1085 }
1086
1087 if (vv->video_fh != fh) {
1088 DEB_S("capturing, but in another open\n");
1089 return -EBUSY;
1090 }
1091
1092 err = -EINVAL;
1093 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1094 err = videobuf_streamoff(&fh->video_q);
1095 else if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
1096 err = videobuf_streamoff(&fh->vbi_q);
1097 if (0 != err) {
1098 DEB_D("warning: videobuf_streamoff() failed\n");
1099 video_end(fh, file);
1100 } else {
1101 err = video_end(fh, file);
1102 }
1103 return err;
1104 }
1105
1106 static int vidioc_g_chip_ident(struct file *file, void *__fh,
1107 struct v4l2_dbg_chip_ident *chip)
1108 {
1109 struct saa7146_fh *fh = __fh;
1110 struct saa7146_dev *dev = fh->dev;
1111
1112 chip->ident = V4L2_IDENT_NONE;
1113 chip->revision = 0;
1114 if (chip->match.type == V4L2_CHIP_MATCH_HOST && !chip->match.addr) {
1115 chip->ident = V4L2_IDENT_SAA7146;
1116 return 0;
1117 }
1118 return v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1119 core, g_chip_ident, chip);
1120 }
1121
1122 const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
1123 .vidioc_querycap = vidioc_querycap,
1124 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1125 .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap,
1126 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1127 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1128 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1129 .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_vid_overlay,
1130 .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_vid_overlay,
1131 .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_vid_overlay,
1132 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
1133 .vidioc_g_chip_ident = vidioc_g_chip_ident,
1134
1135 .vidioc_overlay = vidioc_overlay,
1136 .vidioc_g_fbuf = vidioc_g_fbuf,
1137 .vidioc_s_fbuf = vidioc_s_fbuf,
1138 .vidioc_reqbufs = vidioc_reqbufs,
1139 .vidioc_querybuf = vidioc_querybuf,
1140 .vidioc_qbuf = vidioc_qbuf,
1141 .vidioc_dqbuf = vidioc_dqbuf,
1142 .vidioc_g_std = vidioc_g_std,
1143 .vidioc_s_std = vidioc_s_std,
1144 .vidioc_queryctrl = vidioc_queryctrl,
1145 .vidioc_g_ctrl = vidioc_g_ctrl,
1146 .vidioc_s_ctrl = vidioc_s_ctrl,
1147 .vidioc_streamon = vidioc_streamon,
1148 .vidioc_streamoff = vidioc_streamoff,
1149 .vidioc_g_parm = vidioc_g_parm,
1150 };
1151
1152 /*********************************************************************************/
1153 /* buffer handling functions */
1154
1155 static int buffer_activate (struct saa7146_dev *dev,
1156 struct saa7146_buf *buf,
1157 struct saa7146_buf *next)
1158 {
1159 struct saa7146_vv *vv = dev->vv_data;
1160
1161 buf->vb.state = VIDEOBUF_ACTIVE;
1162 saa7146_set_capture(dev,buf,next);
1163
1164 mod_timer(&vv->video_q.timeout, jiffies+BUFFER_TIMEOUT);
1165 return 0;
1166 }
1167
1168 static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf)
1169 {
1170 saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1171 saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1172 saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1173 }
1174
1175 static int buffer_prepare(struct videobuf_queue *q,
1176 struct videobuf_buffer *vb, enum v4l2_field field)
1177 {
1178 struct file *file = q->priv_data;
1179 struct saa7146_fh *fh = file->private_data;
1180 struct saa7146_dev *dev = fh->dev;
1181 struct saa7146_vv *vv = dev->vv_data;
1182 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1183 int size,err = 0;
1184
1185 DEB_CAP("vbuf:%p\n", vb);
1186
1187 /* sanity checks */
1188 if (fh->video_fmt.width < 48 ||
1189 fh->video_fmt.height < 32 ||
1190 fh->video_fmt.width > vv->standard->h_max_out ||
1191 fh->video_fmt.height > vv->standard->v_max_out) {
1192 DEB_D("w (%d) / h (%d) out of bounds\n",
1193 fh->video_fmt.width, fh->video_fmt.height);
1194 return -EINVAL;
1195 }
1196
1197 size = fh->video_fmt.sizeimage;
1198 if (0 != buf->vb.baddr && buf->vb.bsize < size) {
1199 DEB_D("size mismatch\n");
1200 return -EINVAL;
1201 }
1202
1203 DEB_CAP("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
1204 fh->video_fmt.width, fh->video_fmt.height,
1205 size, v4l2_field_names[fh->video_fmt.field]);
1206 if (buf->vb.width != fh->video_fmt.width ||
1207 buf->vb.bytesperline != fh->video_fmt.bytesperline ||
1208 buf->vb.height != fh->video_fmt.height ||
1209 buf->vb.size != size ||
1210 buf->vb.field != field ||
1211 buf->vb.field != fh->video_fmt.field ||
1212 buf->fmt != &fh->video_fmt) {
1213 saa7146_dma_free(dev,q,buf);
1214 }
1215
1216 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
1217 struct saa7146_format *sfmt;
1218
1219 buf->vb.bytesperline = fh->video_fmt.bytesperline;
1220 buf->vb.width = fh->video_fmt.width;
1221 buf->vb.height = fh->video_fmt.height;
1222 buf->vb.size = size;
1223 buf->vb.field = field;
1224 buf->fmt = &fh->video_fmt;
1225 buf->vb.field = fh->video_fmt.field;
1226
1227 sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
1228
1229 release_all_pagetables(dev, buf);
1230 if( 0 != IS_PLANAR(sfmt->trans)) {
1231 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1232 saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1233 saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1234 } else {
1235 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1236 }
1237
1238 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
1239 if (err)
1240 goto oops;
1241 err = saa7146_pgtable_build(dev,buf);
1242 if (err)
1243 goto oops;
1244 }
1245 buf->vb.state = VIDEOBUF_PREPARED;
1246 buf->activate = buffer_activate;
1247
1248 return 0;
1249
1250 oops:
1251 DEB_D("error out\n");
1252 saa7146_dma_free(dev,q,buf);
1253
1254 return err;
1255 }
1256
1257 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1258 {
1259 struct file *file = q->priv_data;
1260 struct saa7146_fh *fh = file->private_data;
1261
1262 if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1263 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1264
1265 *size = fh->video_fmt.sizeimage;
1266
1267 /* check if we exceed the "max_memory" parameter */
1268 if( (*count * *size) > (max_memory*1048576) ) {
1269 *count = (max_memory*1048576) / *size;
1270 }
1271
1272 DEB_CAP("%d buffers, %d bytes each\n", *count, *size);
1273
1274 return 0;
1275 }
1276
1277 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1278 {
1279 struct file *file = q->priv_data;
1280 struct saa7146_fh *fh = file->private_data;
1281 struct saa7146_dev *dev = fh->dev;
1282 struct saa7146_vv *vv = dev->vv_data;
1283 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1284
1285 DEB_CAP("vbuf:%p\n", vb);
1286 saa7146_buffer_queue(fh->dev,&vv->video_q,buf);
1287 }
1288
1289 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1290 {
1291 struct file *file = q->priv_data;
1292 struct saa7146_fh *fh = file->private_data;
1293 struct saa7146_dev *dev = fh->dev;
1294 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1295
1296 DEB_CAP("vbuf:%p\n", vb);
1297
1298 saa7146_dma_free(dev,q,buf);
1299
1300 release_all_pagetables(dev, buf);
1301 }
1302
1303 static struct videobuf_queue_ops video_qops = {
1304 .buf_setup = buffer_setup,
1305 .buf_prepare = buffer_prepare,
1306 .buf_queue = buffer_queue,
1307 .buf_release = buffer_release,
1308 };
1309
1310 /********************************************************************************/
1311 /* file operations */
1312
1313 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1314 {
1315 INIT_LIST_HEAD(&vv->video_q.queue);
1316
1317 init_timer(&vv->video_q.timeout);
1318 vv->video_q.timeout.function = saa7146_buffer_timeout;
1319 vv->video_q.timeout.data = (unsigned long)(&vv->video_q);
1320 vv->video_q.dev = dev;
1321
1322 /* set some default values */
1323 vv->standard = &dev->ext_vv_data->stds[0];
1324
1325 /* FIXME: what's this? */
1326 vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1327 vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1328 }
1329
1330
1331 static int video_open(struct saa7146_dev *dev, struct file *file)
1332 {
1333 struct saa7146_fh *fh = file->private_data;
1334 struct saa7146_format *sfmt;
1335
1336 fh->video_fmt.width = 384;
1337 fh->video_fmt.height = 288;
1338 fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24;
1339 fh->video_fmt.bytesperline = 0;
1340 fh->video_fmt.field = V4L2_FIELD_ANY;
1341 sfmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat);
1342 fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8;
1343
1344 videobuf_queue_sg_init(&fh->video_q, &video_qops,
1345 &dev->pci->dev, &dev->slock,
1346 V4L2_BUF_TYPE_VIDEO_CAPTURE,
1347 V4L2_FIELD_INTERLACED,
1348 sizeof(struct saa7146_buf),
1349 file, &dev->v4l2_lock);
1350
1351 return 0;
1352 }
1353
1354
1355 static void video_close(struct saa7146_dev *dev, struct file *file)
1356 {
1357 struct saa7146_fh *fh = file->private_data;
1358 struct saa7146_vv *vv = dev->vv_data;
1359 struct videobuf_queue *q = &fh->video_q;
1360
1361 if (IS_CAPTURE_ACTIVE(fh) != 0)
1362 video_end(fh, file);
1363 else if (IS_OVERLAY_ACTIVE(fh) != 0)
1364 saa7146_stop_preview(fh);
1365
1366 videobuf_stop(q);
1367 /* hmm, why is this function declared void? */
1368 }
1369
1370
1371 static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1372 {
1373 struct saa7146_vv *vv = dev->vv_data;
1374 struct saa7146_dmaqueue *q = &vv->video_q;
1375
1376 spin_lock(&dev->slock);
1377 DEB_CAP("called\n");
1378
1379 /* only finish the buffer if we have one... */
1380 if( NULL != q->curr ) {
1381 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
1382 }
1383 saa7146_buffer_next(dev,q,0);
1384
1385 spin_unlock(&dev->slock);
1386 }
1387
1388 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1389 {
1390 struct saa7146_fh *fh = file->private_data;
1391 struct saa7146_dev *dev = fh->dev;
1392 struct saa7146_vv *vv = dev->vv_data;
1393 ssize_t ret = 0;
1394
1395 DEB_EE("called\n");
1396
1397 if ((vv->video_status & STATUS_CAPTURE) != 0) {
1398 /* fixme: should we allow read() captures while streaming capture? */
1399 if (vv->video_fh == fh) {
1400 DEB_S("already capturing\n");
1401 return -EBUSY;
1402 }
1403 DEB_S("already capturing in another open\n");
1404 return -EBUSY;
1405 }
1406
1407 ret = video_begin(fh);
1408 if( 0 != ret) {
1409 goto out;
1410 }
1411
1412 ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1413 file->f_flags & O_NONBLOCK);
1414 if (ret != 0) {
1415 video_end(fh, file);
1416 } else {
1417 ret = video_end(fh, file);
1418 }
1419 out:
1420 /* restart overlay if it was active before */
1421 if (vv->ov_suspend != NULL) {
1422 saa7146_start_preview(vv->ov_suspend);
1423 vv->ov_suspend = NULL;
1424 }
1425
1426 return ret;
1427 }
1428
1429 struct saa7146_use_ops saa7146_video_uops = {
1430 .init = video_init,
1431 .open = video_open,
1432 .release = video_close,
1433 .irq_done = video_irq_done,
1434 .read = video_read,
1435 };