blob: 30779498c173fa846af6769294c94c44c7058e0d [file] [log] [blame]
Joe Perches44d0b802011-08-21 19:56:44 -03001#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
2
Linus Torvalds1da177e2005-04-16 15:20:36 -07003#include <media/saa7146_vv.h>
Hans Verkuil537fa492012-05-01 12:04:52 -03004#include <media/v4l2-event.h>
5#include <media/v4l2-ctrls.h>
Paul Gortmaker7a707b82011-07-03 14:03:12 -04006#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007
8static int max_memory = 32;
9
10module_param(max_memory, int, 0644);
11MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)");
12
13#define IS_CAPTURE_ACTIVE(fh) \
14 (((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh))
15
16#define IS_OVERLAY_ACTIVE(fh) \
17 (((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh))
18
19/* format descriptions for capture and preview */
20static struct saa7146_format formats[] = {
21 {
22 .name = "RGB-8 (3-3-2)",
23 .pixelformat = V4L2_PIX_FMT_RGB332,
24 .trans = RGB08_COMPOSED,
25 .depth = 8,
26 .flags = 0,
27 }, {
28 .name = "RGB-16 (5/B-6/G-5/R)",
29 .pixelformat = V4L2_PIX_FMT_RGB565,
30 .trans = RGB16_COMPOSED,
31 .depth = 16,
32 .flags = 0,
33 }, {
34 .name = "RGB-24 (B-G-R)",
35 .pixelformat = V4L2_PIX_FMT_BGR24,
36 .trans = RGB24_COMPOSED,
37 .depth = 24,
38 .flags = 0,
39 }, {
40 .name = "RGB-32 (B-G-R)",
41 .pixelformat = V4L2_PIX_FMT_BGR32,
42 .trans = RGB32_COMPOSED,
43 .depth = 32,
44 .flags = 0,
45 }, {
46 .name = "RGB-32 (R-G-B)",
47 .pixelformat = V4L2_PIX_FMT_RGB32,
48 .trans = RGB32_COMPOSED,
49 .depth = 32,
50 .flags = 0,
51 .swap = 0x2,
52 }, {
53 .name = "Greyscale-8",
54 .pixelformat = V4L2_PIX_FMT_GREY,
55 .trans = Y8,
56 .depth = 8,
57 .flags = 0,
58 }, {
59 .name = "YUV 4:2:2 planar (Y-Cb-Cr)",
60 .pixelformat = V4L2_PIX_FMT_YUV422P,
61 .trans = YUV422_DECOMPOSED,
62 .depth = 16,
63 .flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
64 }, {
65 .name = "YVU 4:2:0 planar (Y-Cb-Cr)",
66 .pixelformat = V4L2_PIX_FMT_YVU420,
67 .trans = YUV420_DECOMPOSED,
68 .depth = 12,
69 .flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR,
70 }, {
71 .name = "YUV 4:2:0 planar (Y-Cb-Cr)",
72 .pixelformat = V4L2_PIX_FMT_YUV420,
73 .trans = YUV420_DECOMPOSED,
74 .depth = 12,
75 .flags = FORMAT_IS_PLANAR,
76 }, {
77 .name = "YUV 4:2:2 (U-Y-V-Y)",
78 .pixelformat = V4L2_PIX_FMT_UYVY,
79 .trans = YUV422_COMPOSED,
80 .depth = 16,
81 .flags = 0,
82 }
83};
84
85/* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps.
86 due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped
87 (like V4L2_PIX_FMT_YUYV) ... 8-( */
88
89static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format);
90
Mauro Carvalho Chehaba757ee22010-12-02 01:57:03 -020091struct saa7146_format* saa7146_format_by_fourcc(struct saa7146_dev *dev, int fourcc)
Linus Torvalds1da177e2005-04-16 15:20:36 -070092{
93 int i, j = NUM_FORMATS;
94
95 for (i = 0; i < j; i++) {
96 if (formats[i].pixelformat == fourcc) {
97 return formats+i;
98 }
99 }
100
Joe Perches44d0b802011-08-21 19:56:44 -0300101 DEB_D("unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 return NULL;
103}
104
Hans Verkuilb9600742009-01-18 19:59:11 -0300105static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
107int saa7146_start_preview(struct saa7146_fh *fh)
108{
109 struct saa7146_dev *dev = fh->dev;
110 struct saa7146_vv *vv = dev->vv_data;
Hans Verkuilb9600742009-01-18 19:59:11 -0300111 struct v4l2_format fmt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 int ret = 0, err = 0;
113
Joe Perches44d0b802011-08-21 19:56:44 -0300114 DEB_EE("dev:%p, fh:%p\n", dev, fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
Hans Verkuil5da545a2012-05-01 11:06:44 -0300116 /* check if we have overlay information */
117 if (vv->ov.fh == NULL) {
Joe Perches44d0b802011-08-21 19:56:44 -0300118 DEB_D("no overlay data available. try S_FMT first.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 return -EAGAIN;
120 }
121
122 /* check if streaming capture is running */
123 if (IS_CAPTURE_ACTIVE(fh) != 0) {
Joe Perches44d0b802011-08-21 19:56:44 -0300124 DEB_D("streaming capture is active\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 return -EBUSY;
126 }
127
128 /* check if overlay is running */
129 if (IS_OVERLAY_ACTIVE(fh) != 0) {
130 if (vv->video_fh == fh) {
Joe Perches44d0b802011-08-21 19:56:44 -0300131 DEB_D("overlay is already active\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 return 0;
133 }
Joe Perches44d0b802011-08-21 19:56:44 -0300134 DEB_D("overlay is already active in another open\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 return -EBUSY;
136 }
137
138 if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) {
Joe Perches44d0b802011-08-21 19:56:44 -0300139 DEB_D("cannot get necessary overlay resources\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 return -EBUSY;
141 }
142
Hans Verkuil5da545a2012-05-01 11:06:44 -0300143 fmt.fmt.win = vv->ov.win;
Hans Verkuilb9600742009-01-18 19:59:11 -0300144 err = vidioc_try_fmt_vid_overlay(NULL, fh, &fmt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 if (0 != err) {
146 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP);
147 return -EBUSY;
148 }
Hans Verkuil5da545a2012-05-01 11:06:44 -0300149 vv->ov.win = fmt.fmt.win;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
Joe Perches44d0b802011-08-21 19:56:44 -0300151 DEB_D("%dx%d+%d+%d %s field=%s\n",
Hans Verkuil5da545a2012-05-01 11:06:44 -0300152 vv->ov.win.w.width, vv->ov.win.w.height,
153 vv->ov.win.w.left, vv->ov.win.w.top,
154 vv->ov_fmt->name, v4l2_field_names[vv->ov.win.field]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156 if (0 != (ret = saa7146_enable_overlay(fh))) {
Joe Perches44d0b802011-08-21 19:56:44 -0300157 DEB_D("enabling overlay failed: %d\n", ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 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}
Adrian Bunk5d7dc8c2006-04-11 10:26:57 -0300167EXPORT_SYMBOL_GPL(saa7146_start_preview);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
169int saa7146_stop_preview(struct saa7146_fh *fh)
170{
171 struct saa7146_dev *dev = fh->dev;
172 struct saa7146_vv *vv = dev->vv_data;
173
Joe Perches44d0b802011-08-21 19:56:44 -0300174 DEB_EE("dev:%p, fh:%p\n", dev, fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
176 /* check if streaming capture is running */
177 if (IS_CAPTURE_ACTIVE(fh) != 0) {
Joe Perches44d0b802011-08-21 19:56:44 -0300178 DEB_D("streaming capture is active\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 return -EBUSY;
180 }
181
182 /* check if overlay is running at all */
183 if ((vv->video_status & STATUS_OVERLAY) == 0) {
Joe Perches44d0b802011-08-21 19:56:44 -0300184 DEB_D("no active overlay\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 return 0;
186 }
187
188 if (vv->video_fh != fh) {
Joe Perches44d0b802011-08-21 19:56:44 -0300189 DEB_D("overlay is active, but in another open\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 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}
Adrian Bunk5d7dc8c2006-04-11 10:26:57 -0300202EXPORT_SYMBOL_GPL(saa7146_stop_preview);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204/********************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205/* common pagetable functions */
206
207static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf)
208{
209 struct pci_dev *pci = dev->pci;
Mauro Carvalho Chehabc1accaa2007-08-23 16:37:49 -0300210 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
211 struct scatterlist *list = dma->sglist;
212 int length = dma->sglen;
Mauro Carvalho Chehaba757ee22010-12-02 01:57:03 -0200213 struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
Joe Perches44d0b802011-08-21 19:56:44 -0300215 DEB_EE("dev:%p, buf:%p, sg_len:%d\n", dev, buf, length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216
217 if( 0 != IS_PLANAR(sfmt->trans)) {
218 struct saa7146_pgtable *pt1 = &buf->pt[0];
219 struct saa7146_pgtable *pt2 = &buf->pt[1];
220 struct saa7146_pgtable *pt3 = &buf->pt[2];
Al Viroa36ef6b2008-06-22 14:19:19 -0300221 __le32 *ptr1, *ptr2, *ptr3;
222 __le32 fill;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
224 int size = buf->fmt->width*buf->fmt->height;
225 int i,p,m1,m2,m3,o1,o2;
226
227 switch( sfmt->depth ) {
228 case 12: {
229 /* create some offsets inside the page table */
230 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
231 m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1;
232 m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
233 o1 = size%PAGE_SIZE;
234 o2 = (size+(size/4))%PAGE_SIZE;
Joe Perches44d0b802011-08-21 19:56:44 -0300235 DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",
236 size, m1, m2, m3, o1, o2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 break;
238 }
239 case 16: {
240 /* create some offsets inside the page table */
241 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1;
242 m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1;
243 m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1;
244 o1 = size%PAGE_SIZE;
245 o2 = (size+(size/2))%PAGE_SIZE;
Joe Perches44d0b802011-08-21 19:56:44 -0300246 DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",
247 size, m1, m2, m3, o1, o2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 break;
249 }
250 default: {
251 return -1;
252 }
253 }
254
255 ptr1 = pt1->cpu;
256 ptr2 = pt2->cpu;
257 ptr3 = pt3->cpu;
258
259 /* walk all pages, copy all page addresses to ptr1 */
260 for (i = 0; i < length; i++, list++) {
261 for (p = 0; p * 4096 < list->length; p++, ptr1++) {
262 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset);
263 }
264 }
265/*
266 ptr1 = pt1->cpu;
267 for(j=0;j<40;j++) {
268 printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
269 }
270*/
271
272 /* if we have a user buffer, the first page may not be
273 aligned to a page boundary. */
Hans Verkuil429e9082008-07-27 14:08:54 -0300274 pt1->offset = dma->sglist->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 pt2->offset = pt1->offset+o1;
276 pt3->offset = pt1->offset+o2;
277
278 /* create video-dma2 page table */
279 ptr1 = pt1->cpu;
280 for(i = m1; i <= m2 ; i++, ptr2++) {
281 *ptr2 = ptr1[i];
282 }
283 fill = *(ptr2-1);
284 for(;i<1024;i++,ptr2++) {
285 *ptr2 = fill;
286 }
287 /* create video-dma3 page table */
288 ptr1 = pt1->cpu;
289 for(i = m2; i <= m3; i++,ptr3++) {
290 *ptr3 = ptr1[i];
291 }
292 fill = *(ptr3-1);
293 for(;i<1024;i++,ptr3++) {
294 *ptr3 = fill;
295 }
296 /* finally: finish up video-dma1 page table */
297 ptr1 = pt1->cpu+m1;
298 fill = pt1->cpu[m1];
299 for(i=m1;i<1024;i++,ptr1++) {
300 *ptr1 = fill;
301 }
302/*
303 ptr1 = pt1->cpu;
304 ptr2 = pt2->cpu;
305 ptr3 = pt3->cpu;
306 for(j=0;j<40;j++) {
307 printk("ptr1 %d: 0x%08x\n",j,ptr1[j]);
308 }
309 for(j=0;j<40;j++) {
310 printk("ptr2 %d: 0x%08x\n",j,ptr2[j]);
311 }
312 for(j=0;j<40;j++) {
313 printk("ptr3 %d: 0x%08x\n",j,ptr3[j]);
314 }
315*/
316 } else {
317 struct saa7146_pgtable *pt = &buf->pt[0];
318 return saa7146_pgtable_build_single(pci, pt, list, length);
319 }
320
321 return 0;
322}
323
324
325/********************************************************************************/
326/* file operations */
327
328static int video_begin(struct saa7146_fh *fh)
329{
330 struct saa7146_dev *dev = fh->dev;
331 struct saa7146_vv *vv = dev->vv_data;
332 struct saa7146_format *fmt = NULL;
333 unsigned int resource;
334 int ret = 0, err = 0;
335
Joe Perches44d0b802011-08-21 19:56:44 -0300336 DEB_EE("dev:%p, fh:%p\n", dev, fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
338 if ((vv->video_status & STATUS_CAPTURE) != 0) {
339 if (vv->video_fh == fh) {
Joe Perches44d0b802011-08-21 19:56:44 -0300340 DEB_S("already capturing\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 return 0;
342 }
Joe Perches44d0b802011-08-21 19:56:44 -0300343 DEB_S("already capturing in another open\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 return -EBUSY;
345 }
346
347 if ((vv->video_status & STATUS_OVERLAY) != 0) {
Joe Perches44d0b802011-08-21 19:56:44 -0300348 DEB_S("warning: suspending overlay video for streaming capture\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 vv->ov_suspend = vv->video_fh;
350 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
351 if (0 != err) {
Joe Perches44d0b802011-08-21 19:56:44 -0300352 DEB_D("suspending video failed. aborting\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 return err;
354 }
355 }
356
Hans Verkuilfd74d6e2012-05-01 11:17:35 -0300357 fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 /* we need to have a valid format set here */
359 BUG_ON(NULL == fmt);
360
361 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
362 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
363 } else {
364 resource = RESOURCE_DMA1_HPS;
365 }
366
367 ret = saa7146_res_get(fh, resource);
368 if (0 == ret) {
Joe Perches44d0b802011-08-21 19:56:44 -0300369 DEB_S("cannot get capture resource %d\n", resource);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 if (vv->ov_suspend != NULL) {
371 saa7146_start_preview(vv->ov_suspend);
372 vv->ov_suspend = NULL;
373 }
374 return -EBUSY;
375 }
376
377 /* clear out beginning of streaming bit (rps register 0)*/
378 saa7146_write(dev, MC2, MASK_27 );
379
380 /* enable rps0 irqs */
381 SAA7146_IER_ENABLE(dev, MASK_27);
382
383 vv->video_fh = fh;
384 vv->video_status = STATUS_CAPTURE;
385
386 return 0;
387}
388
389static int video_end(struct saa7146_fh *fh, struct file *file)
390{
391 struct saa7146_dev *dev = fh->dev;
392 struct saa7146_vv *vv = dev->vv_data;
393 struct saa7146_format *fmt = NULL;
394 unsigned long flags;
395 unsigned int resource;
396 u32 dmas = 0;
Joe Perches44d0b802011-08-21 19:56:44 -0300397 DEB_EE("dev:%p, fh:%p\n", dev, fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398
399 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
Joe Perches44d0b802011-08-21 19:56:44 -0300400 DEB_S("not capturing\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 return 0;
402 }
403
404 if (vv->video_fh != fh) {
Joe Perches44d0b802011-08-21 19:56:44 -0300405 DEB_S("capturing, but in another open\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 return -EBUSY;
407 }
408
Hans Verkuilfd74d6e2012-05-01 11:17:35 -0300409 fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 /* we need to have a valid format set here */
411 BUG_ON(NULL == fmt);
412
413 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) {
414 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS;
415 dmas = MASK_22 | MASK_21 | MASK_20;
416 } else {
417 resource = RESOURCE_DMA1_HPS;
418 dmas = MASK_22;
419 }
420 spin_lock_irqsave(&dev->slock,flags);
421
422 /* disable rps0 */
423 saa7146_write(dev, MC1, MASK_28);
424
425 /* disable rps0 irqs */
426 SAA7146_IER_DISABLE(dev, MASK_27);
427
428 /* shut down all used video dma transfers */
429 saa7146_write(dev, MC1, dmas);
430
431 spin_unlock_irqrestore(&dev->slock, flags);
432
433 vv->video_fh = NULL;
434 vv->video_status = 0;
435
436 saa7146_res_free(fh, resource);
437
438 if (vv->ov_suspend != NULL) {
439 saa7146_start_preview(vv->ov_suspend);
440 vv->ov_suspend = NULL;
441 }
442
443 return 0;
444}
445
Hans Verkuilb9600742009-01-18 19:59:11 -0300446static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447{
Hans Verkuilab49ae02012-05-01 12:57:57 -0300448 struct video_device *vdev = video_devdata(file);
Hans Verkuilb9600742009-01-18 19:59:11 -0300449 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
450
451 strcpy((char *)cap->driver, "saa7146 v4l2");
452 strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
453 sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci));
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300454 cap->device_caps =
Hans Verkuilb9600742009-01-18 19:59:11 -0300455 V4L2_CAP_VIDEO_CAPTURE |
456 V4L2_CAP_VIDEO_OVERLAY |
457 V4L2_CAP_READWRITE |
458 V4L2_CAP_STREAMING;
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300459 cap->device_caps |= dev->ext_vv_data->capabilities;
Hans Verkuila299e402012-05-06 13:31:27 -0300460 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
Hans Verkuilab49ae02012-05-01 12:57:57 -0300461 if (vdev->vfl_type == VFL_TYPE_GRABBER)
462 cap->device_caps &=
463 ~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT);
464 else
465 cap->device_caps &=
Hans Verkuila299e402012-05-06 13:31:27 -0300466 ~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY | V4L2_CAP_AUDIO);
Hans Verkuilb9600742009-01-18 19:59:11 -0300467 return 0;
468}
469
470static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
471{
472 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 struct saa7146_vv *vv = dev->vv_data;
474
Hans Verkuilb9600742009-01-18 19:59:11 -0300475 *fb = vv->ov_fb;
476 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
Hans Verkuil5da545a2012-05-01 11:06:44 -0300477 fb->flags = V4L2_FBUF_FLAG_PRIMARY;
Hans Verkuilb9600742009-01-18 19:59:11 -0300478 return 0;
479}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
Hans Verkuile6eb28c2012-09-04 10:26:45 -0300481static int vidioc_s_fbuf(struct file *file, void *fh, const struct v4l2_framebuffer *fb)
Hans Verkuilb9600742009-01-18 19:59:11 -0300482{
483 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
484 struct saa7146_vv *vv = dev->vv_data;
485 struct saa7146_format *fmt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Joe Perches44d0b802011-08-21 19:56:44 -0300487 DEB_EE("VIDIOC_S_FBUF\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
Hans Verkuilb9600742009-01-18 19:59:11 -0300489 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
490 return -EPERM;
491
492 /* check args */
Mauro Carvalho Chehaba757ee22010-12-02 01:57:03 -0200493 fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat);
Hans Verkuilb9600742009-01-18 19:59:11 -0300494 if (NULL == fmt)
495 return -EINVAL;
496
497 /* planar formats are not allowed for overlay video, clipping and video dma would clash */
498 if (fmt->flags & FORMAT_IS_PLANAR)
Joe Perches44d0b802011-08-21 19:56:44 -0300499 DEB_S("planar pixelformat '%4.4s' not allowed for overlay\n",
500 (char *)&fmt->pixelformat);
Hans Verkuilb9600742009-01-18 19:59:11 -0300501
502 /* check if overlay is running */
503 if (IS_OVERLAY_ACTIVE(fh) != 0) {
504 if (vv->video_fh != fh) {
Joe Perches44d0b802011-08-21 19:56:44 -0300505 DEB_D("refusing to change framebuffer informations while overlay is active in another open\n");
Hans Verkuilb9600742009-01-18 19:59:11 -0300506 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 }
508 }
509
Hans Verkuilb9600742009-01-18 19:59:11 -0300510 /* ok, accept it */
511 vv->ov_fb = *fb;
512 vv->ov_fmt = fmt;
Michael Hunold84a1d9c82010-03-13 11:45:46 -0300513
514 if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) {
515 vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8;
Joe Perches44d0b802011-08-21 19:56:44 -0300516 DEB_D("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline);
Michael Hunold84a1d9c82010-03-13 11:45:46 -0300517 }
Hans Verkuilb9600742009-01-18 19:59:11 -0300518 return 0;
519}
520
521static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
522{
523 if (f->index >= NUM_FORMATS)
524 return -EINVAL;
525 strlcpy((char *)f->description, formats[f->index].name,
526 sizeof(f->description));
527 f->pixelformat = formats[f->index].pixelformat;
528 return 0;
529}
530
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300531int saa7146_s_ctrl(struct v4l2_ctrl *ctrl)
Hans Verkuilb9600742009-01-18 19:59:11 -0300532{
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300533 struct saa7146_dev *dev = container_of(ctrl->handler,
534 struct saa7146_dev, ctrl_handler);
Hans Verkuilb9600742009-01-18 19:59:11 -0300535 struct saa7146_vv *vv = dev->vv_data;
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300536 u32 val;
Hans Verkuilb9600742009-01-18 19:59:11 -0300537
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300538 switch (ctrl->id) {
Hans Verkuilb9600742009-01-18 19:59:11 -0300539 case V4L2_CID_BRIGHTNESS:
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300540 val = saa7146_read(dev, BCS_CTRL);
541 val &= 0x00ffffff;
542 val |= (ctrl->val << 24);
543 saa7146_write(dev, BCS_CTRL, val);
544 saa7146_write(dev, MC2, MASK_22 | MASK_06);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 break;
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300546
Hans Verkuilb9600742009-01-18 19:59:11 -0300547 case V4L2_CID_CONTRAST:
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300548 val = saa7146_read(dev, BCS_CTRL);
549 val &= 0xff00ffff;
550 val |= (ctrl->val << 16);
551 saa7146_write(dev, BCS_CTRL, val);
552 saa7146_write(dev, MC2, MASK_22 | MASK_06);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 break;
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300554
Hans Verkuilb9600742009-01-18 19:59:11 -0300555 case V4L2_CID_SATURATION:
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300556 val = saa7146_read(dev, BCS_CTRL);
557 val &= 0xffffff00;
558 val |= (ctrl->val << 0);
559 saa7146_write(dev, BCS_CTRL, val);
Hans Verkuilb9600742009-01-18 19:59:11 -0300560 saa7146_write(dev, MC2, MASK_22 | MASK_06);
561 break;
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300562
Hans Verkuilb9600742009-01-18 19:59:11 -0300563 case V4L2_CID_HFLIP:
564 /* fixme: we can support changing VFLIP and HFLIP here... */
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300565 if ((vv->video_status & STATUS_CAPTURE))
Hans Verkuil5a5b9642009-02-07 11:25:05 -0300566 return -EBUSY;
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300567 vv->hflip = ctrl->val;
Hans Verkuilb9600742009-01-18 19:59:11 -0300568 break;
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300569
Hans Verkuilb9600742009-01-18 19:59:11 -0300570 case V4L2_CID_VFLIP:
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300571 if ((vv->video_status & STATUS_CAPTURE))
Hans Verkuil5a5b9642009-02-07 11:25:05 -0300572 return -EBUSY;
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300573 vv->vflip = ctrl->val;
Hans Verkuilb9600742009-01-18 19:59:11 -0300574 break;
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300575
Hans Verkuilb9600742009-01-18 19:59:11 -0300576 default:
Hans Verkuilb9600742009-01-18 19:59:11 -0300577 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300580 if ((vv->video_status & STATUS_OVERLAY) != 0) { /* CHECK: && (vv->video_fh == fh)) */
581 struct saa7146_fh *fh = vv->video_fh;
582
Hans Verkuilb9600742009-01-18 19:59:11 -0300583 saa7146_stop_preview(fh);
584 saa7146_start_preview(fh);
585 }
586 return 0;
587}
588
589static int vidioc_g_parm(struct file *file, void *fh,
590 struct v4l2_streamparm *parm)
591{
Trent Piepho717167e2009-03-04 01:21:03 -0300592 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
593 struct saa7146_vv *vv = dev->vv_data;
594
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300595 if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
596 return -EINVAL;
Hans Verkuilb9600742009-01-18 19:59:11 -0300597 parm->parm.capture.readbuffers = 1;
Trent Piepho717167e2009-03-04 01:21:03 -0300598 v4l2_video_std_frame_period(vv->standard->id,
599 &parm->parm.capture.timeperframe);
Hans Verkuilb9600742009-01-18 19:59:11 -0300600 return 0;
601}
602
603static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
604{
Hans Verkuilfd74d6e2012-05-01 11:17:35 -0300605 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
606 struct saa7146_vv *vv = dev->vv_data;
607
608 f->fmt.pix = vv->video_fmt;
Hans Verkuilb9600742009-01-18 19:59:11 -0300609 return 0;
610}
611
612static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
613{
Hans Verkuil5da545a2012-05-01 11:06:44 -0300614 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
615 struct saa7146_vv *vv = dev->vv_data;
616
617 f->fmt.win = vv->ov.win;
Hans Verkuilb9600742009-01-18 19:59:11 -0300618 return 0;
619}
620
621static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f)
622{
Hans Verkuilfca34692012-05-01 11:28:20 -0300623 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
624 struct saa7146_vv *vv = dev->vv_data;
625
626 f->fmt.vbi = vv->vbi_fmt;
Hans Verkuilb9600742009-01-18 19:59:11 -0300627 return 0;
628}
629
630static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
631{
632 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
633 struct saa7146_vv *vv = dev->vv_data;
634 struct saa7146_format *fmt;
635 enum v4l2_field field;
636 int maxw, maxh;
637 int calc_bpl;
638
Joe Perches44d0b802011-08-21 19:56:44 -0300639 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
Hans Verkuilb9600742009-01-18 19:59:11 -0300640
Mauro Carvalho Chehaba757ee22010-12-02 01:57:03 -0200641 fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat);
Hans Verkuilb9600742009-01-18 19:59:11 -0300642 if (NULL == fmt)
643 return -EINVAL;
644
645 field = f->fmt.pix.field;
646 maxw = vv->standard->h_max_out;
647 maxh = vv->standard->v_max_out;
648
649 if (V4L2_FIELD_ANY == field) {
650 field = (f->fmt.pix.height > maxh / 2)
651 ? V4L2_FIELD_INTERLACED
652 : V4L2_FIELD_BOTTOM;
653 }
654 switch (field) {
655 case V4L2_FIELD_ALTERNATE:
656 vv->last_field = V4L2_FIELD_TOP;
657 maxh = maxh / 2;
658 break;
659 case V4L2_FIELD_TOP:
660 case V4L2_FIELD_BOTTOM:
661 vv->last_field = V4L2_FIELD_INTERLACED;
662 maxh = maxh / 2;
663 break;
664 case V4L2_FIELD_INTERLACED:
665 vv->last_field = V4L2_FIELD_INTERLACED;
666 break;
667 default:
Joe Perches44d0b802011-08-21 19:56:44 -0300668 DEB_D("no known field mode '%d'\n", field);
Hans Verkuilb9600742009-01-18 19:59:11 -0300669 return -EINVAL;
670 }
671
672 f->fmt.pix.field = field;
Hans Verkuil6e65ca92012-04-29 16:47:47 -0300673 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
Hans Verkuilb9600742009-01-18 19:59:11 -0300674 if (f->fmt.pix.width > maxw)
675 f->fmt.pix.width = maxw;
676 if (f->fmt.pix.height > maxh)
677 f->fmt.pix.height = maxh;
678
679 calc_bpl = (f->fmt.pix.width * fmt->depth) / 8;
680
681 if (f->fmt.pix.bytesperline < calc_bpl)
682 f->fmt.pix.bytesperline = calc_bpl;
683
684 if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */
685 f->fmt.pix.bytesperline = calc_bpl;
686
687 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
Joe Perches44d0b802011-08-21 19:56:44 -0300688 DEB_D("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n",
689 f->fmt.pix.width, f->fmt.pix.height,
690 f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
Hans Verkuilb9600742009-01-18 19:59:11 -0300691
692 return 0;
693}
694
695
696static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f)
697{
698 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
699 struct saa7146_vv *vv = dev->vv_data;
700 struct v4l2_window *win = &f->fmt.win;
701 enum v4l2_field field;
702 int maxw, maxh;
703
Joe Perches44d0b802011-08-21 19:56:44 -0300704 DEB_EE("dev:%p\n", dev);
Hans Verkuilb9600742009-01-18 19:59:11 -0300705
706 if (NULL == vv->ov_fb.base) {
Joe Perches44d0b802011-08-21 19:56:44 -0300707 DEB_D("no fb base set\n");
Hans Verkuilb9600742009-01-18 19:59:11 -0300708 return -EINVAL;
709 }
710 if (NULL == vv->ov_fmt) {
Joe Perches44d0b802011-08-21 19:56:44 -0300711 DEB_D("no fb fmt set\n");
Hans Verkuilb9600742009-01-18 19:59:11 -0300712 return -EINVAL;
713 }
714 if (win->w.width < 48 || win->w.height < 32) {
Joe Perches44d0b802011-08-21 19:56:44 -0300715 DEB_D("min width/height. (%d,%d)\n",
716 win->w.width, win->w.height);
Hans Verkuilb9600742009-01-18 19:59:11 -0300717 return -EINVAL;
718 }
719 if (win->clipcount > 16) {
Joe Perches44d0b802011-08-21 19:56:44 -0300720 DEB_D("clipcount too big\n");
Hans Verkuilb9600742009-01-18 19:59:11 -0300721 return -EINVAL;
722 }
723
724 field = win->field;
725 maxw = vv->standard->h_max_out;
726 maxh = vv->standard->v_max_out;
727
728 if (V4L2_FIELD_ANY == field) {
729 field = (win->w.height > maxh / 2)
730 ? V4L2_FIELD_INTERLACED
731 : V4L2_FIELD_TOP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 }
Hans Verkuilb9600742009-01-18 19:59:11 -0300733 switch (field) {
734 case V4L2_FIELD_TOP:
735 case V4L2_FIELD_BOTTOM:
736 case V4L2_FIELD_ALTERNATE:
737 maxh = maxh / 2;
738 break;
739 case V4L2_FIELD_INTERLACED:
740 break;
741 default:
Joe Perches44d0b802011-08-21 19:56:44 -0300742 DEB_D("no known field mode '%d'\n", field);
Hans Verkuilb9600742009-01-18 19:59:11 -0300743 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745
Hans Verkuilb9600742009-01-18 19:59:11 -0300746 win->field = field;
747 if (win->w.width > maxw)
748 win->w.width = maxw;
749 if (win->w.height > maxh)
750 win->w.height = maxh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751
Hans Verkuilb9600742009-01-18 19:59:11 -0300752 return 0;
753}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754
Hans Verkuilb9600742009-01-18 19:59:11 -0300755static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f)
756{
757 struct saa7146_fh *fh = __fh;
758 struct saa7146_dev *dev = fh->dev;
759 struct saa7146_vv *vv = dev->vv_data;
760 int err;
761
Joe Perches44d0b802011-08-21 19:56:44 -0300762 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh);
Hans Verkuilb9600742009-01-18 19:59:11 -0300763 if (IS_CAPTURE_ACTIVE(fh) != 0) {
Joe Perches44d0b802011-08-21 19:56:44 -0300764 DEB_EE("streaming capture is active\n");
Hans Verkuilb9600742009-01-18 19:59:11 -0300765 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 }
Hans Verkuilb9600742009-01-18 19:59:11 -0300767 err = vidioc_try_fmt_vid_cap(file, fh, f);
768 if (0 != err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 return err;
Hans Verkuilfd74d6e2012-05-01 11:17:35 -0300770 vv->video_fmt = f->fmt.pix;
Joe Perches44d0b802011-08-21 19:56:44 -0300771 DEB_EE("set to pixelformat '%4.4s'\n",
Hans Verkuilfd74d6e2012-05-01 11:17:35 -0300772 (char *)&vv->video_fmt.pixelformat);
Hans Verkuilb9600742009-01-18 19:59:11 -0300773 return 0;
774}
775
776static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f)
777{
778 struct saa7146_fh *fh = __fh;
779 struct saa7146_dev *dev = fh->dev;
780 struct saa7146_vv *vv = dev->vv_data;
781 int err;
782
Joe Perches44d0b802011-08-21 19:56:44 -0300783 DEB_EE("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh);
Hans Verkuilb9600742009-01-18 19:59:11 -0300784 err = vidioc_try_fmt_vid_overlay(file, fh, f);
785 if (0 != err)
786 return err;
Hans Verkuil5da545a2012-05-01 11:06:44 -0300787 vv->ov.win = f->fmt.win;
788 vv->ov.nclips = f->fmt.win.clipcount;
789 if (vv->ov.nclips > 16)
790 vv->ov.nclips = 16;
791 if (copy_from_user(vv->ov.clips, f->fmt.win.clips,
792 sizeof(struct v4l2_clip) * vv->ov.nclips)) {
Hans Verkuilb9600742009-01-18 19:59:11 -0300793 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 }
Hans Verkuilb9600742009-01-18 19:59:11 -0300795
Hans Verkuil5da545a2012-05-01 11:06:44 -0300796 /* vv->ov.fh is used to indicate that we have valid overlay informations, too */
797 vv->ov.fh = fh;
Hans Verkuilb9600742009-01-18 19:59:11 -0300798
Hans Verkuilb9600742009-01-18 19:59:11 -0300799 /* check if our current overlay is active */
800 if (IS_OVERLAY_ACTIVE(fh) != 0) {
801 saa7146_stop_preview(fh);
802 saa7146_start_preview(fh);
Mauro Carvalho Chehabafd1a0c2005-12-12 00:37:27 -0800803 }
Hans Verkuilb9600742009-01-18 19:59:11 -0300804 return 0;
805}
806
807static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm)
808{
809 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
810 struct saa7146_vv *vv = dev->vv_data;
811
812 *norm = vv->standard->id;
813 return 0;
814}
815
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 /* the saa7146 supfhrts (used in conjunction with the saa7111a for example)
817 PAL / NTSC / SECAM. if your hardware does not (or does more)
818 -- override this function in your extension */
Hans Verkuilb9600742009-01-18 19:59:11 -0300819/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 case VIDIOC_ENUMSTD:
821 {
822 struct v4l2_standard *e = arg;
823 if (e->index < 0 )
824 return -EINVAL;
825 if( e->index < dev->ext_vv_data->num_stds ) {
Joe Perches44d0b802011-08-21 19:56:44 -0300826 DEB_EE("VIDIOC_ENUMSTD: index:%d\n", e->index);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827 v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name);
828 return 0;
829 }
830 return -EINVAL;
831 }
Hans Verkuilb9600742009-01-18 19:59:11 -0300832 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833
Hans Verkuil314527acb2013-03-15 06:10:40 -0300834static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id id)
Hans Verkuilb9600742009-01-18 19:59:11 -0300835{
836 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
837 struct saa7146_vv *vv = dev->vv_data;
838 int found = 0;
839 int err, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
Joe Perches44d0b802011-08-21 19:56:44 -0300841 DEB_EE("VIDIOC_S_STD\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842
Hans Verkuilb9600742009-01-18 19:59:11 -0300843 if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) {
Joe Perches44d0b802011-08-21 19:56:44 -0300844 DEB_D("cannot change video standard while streaming capture is active\n");
Hans Verkuilb9600742009-01-18 19:59:11 -0300845 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847
Hans Verkuilb9600742009-01-18 19:59:11 -0300848 if ((vv->video_status & STATUS_OVERLAY) != 0) {
849 vv->ov_suspend = vv->video_fh;
850 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 if (0 != err) {
Joe Perches44d0b802011-08-21 19:56:44 -0300852 DEB_D("suspending video failed. aborting\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 return err;
Hans Verkuilb9600742009-01-18 19:59:11 -0300854 }
855 }
Brandon Philips49ee7182007-10-05 16:26:27 -0300856
Hans Verkuilb9600742009-01-18 19:59:11 -0300857 for (i = 0; i < dev->ext_vv_data->num_stds; i++)
Hans Verkuil314527acb2013-03-15 06:10:40 -0300858 if (id & dev->ext_vv_data->stds[i].id)
Hans Verkuilb9600742009-01-18 19:59:11 -0300859 break;
860 if (i != dev->ext_vv_data->num_stds) {
861 vv->standard = &dev->ext_vv_data->stds[i];
862 if (NULL != dev->ext_vv_data->std_callback)
863 dev->ext_vv_data->std_callback(dev, vv->standard);
864 found = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 }
Hans Verkuilb9600742009-01-18 19:59:11 -0300866
Hans Verkuilb9600742009-01-18 19:59:11 -0300867 if (vv->ov_suspend != NULL) {
868 saa7146_start_preview(vv->ov_suspend);
869 vv->ov_suspend = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 }
Hans Verkuilb9600742009-01-18 19:59:11 -0300871
872 if (!found) {
Joe Perches44d0b802011-08-21 19:56:44 -0300873 DEB_EE("VIDIOC_S_STD: standard not found\n");
Hans Verkuilb9600742009-01-18 19:59:11 -0300874 return -EINVAL;
875 }
876
Joe Perches44d0b802011-08-21 19:56:44 -0300877 DEB_EE("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 return 0;
879}
880
Hans Verkuilb9600742009-01-18 19:59:11 -0300881static int vidioc_overlay(struct file *file, void *fh, unsigned int on)
882{
883 int err;
884
Joe Perches44d0b802011-08-21 19:56:44 -0300885 DEB_D("VIDIOC_OVERLAY on:%d\n", on);
Hans Verkuilb9600742009-01-18 19:59:11 -0300886 if (on)
887 err = saa7146_start_preview(fh);
888 else
889 err = saa7146_stop_preview(fh);
890 return err;
891}
892
893static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b)
894{
895 struct saa7146_fh *fh = __fh;
896
897 if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
898 return videobuf_reqbufs(&fh->video_q, b);
899 if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE)
900 return videobuf_reqbufs(&fh->vbi_q, b);
901 return -EINVAL;
902}
903
904static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
905{
906 struct saa7146_fh *fh = __fh;
907
908 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
909 return videobuf_querybuf(&fh->video_q, buf);
910 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
911 return videobuf_querybuf(&fh->vbi_q, buf);
912 return -EINVAL;
913}
914
915static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
916{
917 struct saa7146_fh *fh = __fh;
918
919 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
920 return videobuf_qbuf(&fh->video_q, buf);
921 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
922 return videobuf_qbuf(&fh->vbi_q, buf);
923 return -EINVAL;
924}
925
926static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
927{
928 struct saa7146_fh *fh = __fh;
929
930 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
931 return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK);
932 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE)
933 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK);
934 return -EINVAL;
935}
936
937static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
938{
939 struct saa7146_fh *fh = __fh;
940 int err;
941
Joe Perches44d0b802011-08-21 19:56:44 -0300942 DEB_D("VIDIOC_STREAMON, type:%d\n", type);
Hans Verkuilb9600742009-01-18 19:59:11 -0300943
944 err = video_begin(fh);
945 if (err)
946 return err;
947 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
948 return videobuf_streamon(&fh->video_q);
949 if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
950 return videobuf_streamon(&fh->vbi_q);
951 return -EINVAL;
952}
953
954static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
955{
956 struct saa7146_fh *fh = __fh;
957 struct saa7146_dev *dev = fh->dev;
958 struct saa7146_vv *vv = dev->vv_data;
959 int err;
960
Joe Perches44d0b802011-08-21 19:56:44 -0300961 DEB_D("VIDIOC_STREAMOFF, type:%d\n", type);
Hans Verkuilb9600742009-01-18 19:59:11 -0300962
963 /* ugly: we need to copy some checks from video_end(),
964 because videobuf_streamoff() relies on the capture running.
965 check and fix this */
966 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) {
Joe Perches44d0b802011-08-21 19:56:44 -0300967 DEB_S("not capturing\n");
Hans Verkuilb9600742009-01-18 19:59:11 -0300968 return 0;
969 }
970
971 if (vv->video_fh != fh) {
Joe Perches44d0b802011-08-21 19:56:44 -0300972 DEB_S("capturing, but in another open\n");
Hans Verkuilb9600742009-01-18 19:59:11 -0300973 return -EBUSY;
974 }
975
976 err = -EINVAL;
977 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
978 err = videobuf_streamoff(&fh->video_q);
979 else if (type == V4L2_BUF_TYPE_VBI_CAPTURE)
980 err = videobuf_streamoff(&fh->vbi_q);
981 if (0 != err) {
Joe Perches44d0b802011-08-21 19:56:44 -0300982 DEB_D("warning: videobuf_streamoff() failed\n");
Hans Verkuilb9600742009-01-18 19:59:11 -0300983 video_end(fh, file);
984 } else {
985 err = video_end(fh, file);
986 }
987 return err;
988}
989
Hans Verkuilb9600742009-01-18 19:59:11 -0300990const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = {
991 .vidioc_querycap = vidioc_querycap,
992 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
Trent Piepho717167e2009-03-04 01:21:03 -0300993 .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap,
Hans Verkuilb9600742009-01-18 19:59:11 -0300994 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
995 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
996 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
997 .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_vid_overlay,
998 .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_vid_overlay,
999 .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_vid_overlay,
Hans Verkuilb9600742009-01-18 19:59:11 -03001000
1001 .vidioc_overlay = vidioc_overlay,
1002 .vidioc_g_fbuf = vidioc_g_fbuf,
1003 .vidioc_s_fbuf = vidioc_s_fbuf,
1004 .vidioc_reqbufs = vidioc_reqbufs,
1005 .vidioc_querybuf = vidioc_querybuf,
1006 .vidioc_qbuf = vidioc_qbuf,
1007 .vidioc_dqbuf = vidioc_dqbuf,
1008 .vidioc_g_std = vidioc_g_std,
1009 .vidioc_s_std = vidioc_s_std,
Hans Verkuilb9600742009-01-18 19:59:11 -03001010 .vidioc_streamon = vidioc_streamon,
1011 .vidioc_streamoff = vidioc_streamoff,
1012 .vidioc_g_parm = vidioc_g_parm,
Hans Verkuil537fa492012-05-01 12:04:52 -03001013 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1014 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
Hans Verkuilb9600742009-01-18 19:59:11 -03001015};
1016
Hans Verkuilab49ae02012-05-01 12:57:57 -03001017const struct v4l2_ioctl_ops saa7146_vbi_ioctl_ops = {
1018 .vidioc_querycap = vidioc_querycap,
1019 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
Hans Verkuilab49ae02012-05-01 12:57:57 -03001020
1021 .vidioc_reqbufs = vidioc_reqbufs,
1022 .vidioc_querybuf = vidioc_querybuf,
1023 .vidioc_qbuf = vidioc_qbuf,
1024 .vidioc_dqbuf = vidioc_dqbuf,
1025 .vidioc_g_std = vidioc_g_std,
1026 .vidioc_s_std = vidioc_s_std,
1027 .vidioc_streamon = vidioc_streamon,
1028 .vidioc_streamoff = vidioc_streamoff,
1029 .vidioc_g_parm = vidioc_g_parm,
1030 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1031 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1032};
1033
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034/*********************************************************************************/
1035/* buffer handling functions */
1036
1037static int buffer_activate (struct saa7146_dev *dev,
1038 struct saa7146_buf *buf,
1039 struct saa7146_buf *next)
1040{
1041 struct saa7146_vv *vv = dev->vv_data;
1042
Brandon Philips0fc06862007-11-06 20:02:36 -03001043 buf->vb.state = VIDEOBUF_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 saa7146_set_capture(dev,buf,next);
1045
Hans Verkuil9bb60192012-05-01 11:45:27 -03001046 mod_timer(&vv->video_dmaq.timeout, jiffies+BUFFER_TIMEOUT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 return 0;
1048}
1049
Johann Friedrichs311c70e2009-10-07 04:41:37 -03001050static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf)
1051{
1052 saa7146_pgtable_free(dev->pci, &buf->pt[0]);
1053 saa7146_pgtable_free(dev->pci, &buf->pt[1]);
1054 saa7146_pgtable_free(dev->pci, &buf->pt[2]);
1055}
1056
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057static int buffer_prepare(struct videobuf_queue *q,
1058 struct videobuf_buffer *vb, enum v4l2_field field)
1059{
1060 struct file *file = q->priv_data;
1061 struct saa7146_fh *fh = file->private_data;
1062 struct saa7146_dev *dev = fh->dev;
1063 struct saa7146_vv *vv = dev->vv_data;
1064 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1065 int size,err = 0;
1066
Joe Perches44d0b802011-08-21 19:56:44 -03001067 DEB_CAP("vbuf:%p\n", vb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068
1069 /* sanity checks */
Hans Verkuilfd74d6e2012-05-01 11:17:35 -03001070 if (vv->video_fmt.width < 48 ||
1071 vv->video_fmt.height < 32 ||
1072 vv->video_fmt.width > vv->standard->h_max_out ||
1073 vv->video_fmt.height > vv->standard->v_max_out) {
Joe Perches44d0b802011-08-21 19:56:44 -03001074 DEB_D("w (%d) / h (%d) out of bounds\n",
Hans Verkuilfd74d6e2012-05-01 11:17:35 -03001075 vv->video_fmt.width, vv->video_fmt.height);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 return -EINVAL;
1077 }
1078
Hans Verkuilfd74d6e2012-05-01 11:17:35 -03001079 size = vv->video_fmt.sizeimage;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 if (0 != buf->vb.baddr && buf->vb.bsize < size) {
Joe Perches44d0b802011-08-21 19:56:44 -03001081 DEB_D("size mismatch\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 return -EINVAL;
1083 }
1084
Joe Perches44d0b802011-08-21 19:56:44 -03001085 DEB_CAP("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n",
Hans Verkuilfd74d6e2012-05-01 11:17:35 -03001086 vv->video_fmt.width, vv->video_fmt.height,
1087 size, v4l2_field_names[vv->video_fmt.field]);
1088 if (buf->vb.width != vv->video_fmt.width ||
1089 buf->vb.bytesperline != vv->video_fmt.bytesperline ||
1090 buf->vb.height != vv->video_fmt.height ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 buf->vb.size != size ||
1092 buf->vb.field != field ||
Hans Verkuilfd74d6e2012-05-01 11:17:35 -03001093 buf->vb.field != vv->video_fmt.field ||
1094 buf->fmt != &vv->video_fmt) {
Mauro Carvalho Chehabc7b0ac02006-03-10 12:29:15 -03001095 saa7146_dma_free(dev,q,buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 }
1097
Brandon Philips0fc06862007-11-06 20:02:36 -03001098 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 struct saa7146_format *sfmt;
1100
Hans Verkuilfd74d6e2012-05-01 11:17:35 -03001101 buf->vb.bytesperline = vv->video_fmt.bytesperline;
1102 buf->vb.width = vv->video_fmt.width;
1103 buf->vb.height = vv->video_fmt.height;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 buf->vb.size = size;
1105 buf->vb.field = field;
Hans Verkuilfd74d6e2012-05-01 11:17:35 -03001106 buf->fmt = &vv->video_fmt;
1107 buf->vb.field = vv->video_fmt.field;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108
Mauro Carvalho Chehaba757ee22010-12-02 01:57:03 -02001109 sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110
Johann Friedrichs311c70e2009-10-07 04:41:37 -03001111 release_all_pagetables(dev, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 if( 0 != IS_PLANAR(sfmt->trans)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1114 saa7146_pgtable_alloc(dev->pci, &buf->pt[1]);
1115 saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
1116 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
1118 }
1119
Mauro Carvalho Chehabc7b0ac02006-03-10 12:29:15 -03001120 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 if (err)
1122 goto oops;
1123 err = saa7146_pgtable_build(dev,buf);
1124 if (err)
1125 goto oops;
1126 }
Brandon Philips0fc06862007-11-06 20:02:36 -03001127 buf->vb.state = VIDEOBUF_PREPARED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 buf->activate = buffer_activate;
1129
1130 return 0;
1131
1132 oops:
Joe Perches44d0b802011-08-21 19:56:44 -03001133 DEB_D("error out\n");
Mauro Carvalho Chehabc7b0ac02006-03-10 12:29:15 -03001134 saa7146_dma_free(dev,q,buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135
1136 return err;
1137}
1138
1139static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
1140{
1141 struct file *file = q->priv_data;
1142 struct saa7146_fh *fh = file->private_data;
Hans Verkuilfd74d6e2012-05-01 11:17:35 -03001143 struct saa7146_vv *vv = fh->dev->vv_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144
1145 if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS)
1146 *count = MAX_SAA7146_CAPTURE_BUFFERS;
1147
Hans Verkuilfd74d6e2012-05-01 11:17:35 -03001148 *size = vv->video_fmt.sizeimage;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149
1150 /* check if we exceed the "max_memory" parameter */
1151 if( (*count * *size) > (max_memory*1048576) ) {
1152 *count = (max_memory*1048576) / *size;
1153 }
1154
Joe Perches44d0b802011-08-21 19:56:44 -03001155 DEB_CAP("%d buffers, %d bytes each\n", *count, *size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156
1157 return 0;
1158}
1159
1160static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
1161{
1162 struct file *file = q->priv_data;
1163 struct saa7146_fh *fh = file->private_data;
1164 struct saa7146_dev *dev = fh->dev;
1165 struct saa7146_vv *vv = dev->vv_data;
1166 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1167
Joe Perches44d0b802011-08-21 19:56:44 -03001168 DEB_CAP("vbuf:%p\n", vb);
Hans Verkuil9bb60192012-05-01 11:45:27 -03001169 saa7146_buffer_queue(fh->dev, &vv->video_dmaq, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170}
1171
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
1173{
1174 struct file *file = q->priv_data;
1175 struct saa7146_fh *fh = file->private_data;
1176 struct saa7146_dev *dev = fh->dev;
1177 struct saa7146_buf *buf = (struct saa7146_buf *)vb;
1178
Joe Perches44d0b802011-08-21 19:56:44 -03001179 DEB_CAP("vbuf:%p\n", vb);
Johann Friedrichs311c70e2009-10-07 04:41:37 -03001180
Mauro Carvalho Chehabc7b0ac02006-03-10 12:29:15 -03001181 saa7146_dma_free(dev,q,buf);
Mauro Carvalho Chehabba9e9f32010-02-01 21:23:46 -02001182
1183 release_all_pagetables(dev, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184}
1185
1186static struct videobuf_queue_ops video_qops = {
1187 .buf_setup = buffer_setup,
1188 .buf_prepare = buffer_prepare,
1189 .buf_queue = buffer_queue,
1190 .buf_release = buffer_release,
1191};
1192
1193/********************************************************************************/
1194/* file operations */
1195
1196static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv)
1197{
Hans Verkuil9bb60192012-05-01 11:45:27 -03001198 INIT_LIST_HEAD(&vv->video_dmaq.queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199
Hans Verkuil9bb60192012-05-01 11:45:27 -03001200 init_timer(&vv->video_dmaq.timeout);
1201 vv->video_dmaq.timeout.function = saa7146_buffer_timeout;
1202 vv->video_dmaq.timeout.data = (unsigned long)(&vv->video_dmaq);
1203 vv->video_dmaq.dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204
1205 /* set some default values */
1206 vv->standard = &dev->ext_vv_data->stds[0];
1207
1208 /* FIXME: what's this? */
1209 vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A;
1210 vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A;
1211}
1212
1213
1214static int video_open(struct saa7146_dev *dev, struct file *file)
1215{
Joe Perchesabf84382010-07-12 17:50:03 -03001216 struct saa7146_fh *fh = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217
Guennadi Liakhovetski07051352008-04-22 14:42:13 -03001218 videobuf_queue_sg_init(&fh->video_q, &video_qops,
1219 &dev->pci->dev, &dev->slock,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 V4L2_BUF_TYPE_VIDEO_CAPTURE,
1221 V4L2_FIELD_INTERLACED,
1222 sizeof(struct saa7146_buf),
Hans Verkuil9af39712010-12-18 09:20:59 -03001223 file, &dev->v4l2_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225 return 0;
1226}
1227
1228
1229static void video_close(struct saa7146_dev *dev, struct file *file)
1230{
Joe Perchesabf84382010-07-12 17:50:03 -03001231 struct saa7146_fh *fh = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 struct saa7146_vv *vv = dev->vv_data;
Hartmut Birr2970c492007-04-22 06:57:26 -03001233 struct videobuf_queue *q = &fh->video_q;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234
Hans Verkuil7b4668ef2011-08-25 09:54:30 -03001235 if (IS_CAPTURE_ACTIVE(fh) != 0)
1236 video_end(fh, file);
1237 else if (IS_OVERLAY_ACTIVE(fh) != 0)
1238 saa7146_stop_preview(fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239
Brandon Philips19bc5132007-11-13 20:05:38 -03001240 videobuf_stop(q);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241 /* hmm, why is this function declared void? */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242}
1243
1244
1245static void video_irq_done(struct saa7146_dev *dev, unsigned long st)
1246{
1247 struct saa7146_vv *vv = dev->vv_data;
Hans Verkuil9bb60192012-05-01 11:45:27 -03001248 struct saa7146_dmaqueue *q = &vv->video_dmaq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249
1250 spin_lock(&dev->slock);
Joe Perches44d0b802011-08-21 19:56:44 -03001251 DEB_CAP("called\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252
1253 /* only finish the buffer if we have one... */
1254 if( NULL != q->curr ) {
Brandon Philips0fc06862007-11-06 20:02:36 -03001255 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 }
1257 saa7146_buffer_next(dev,q,0);
1258
1259 spin_unlock(&dev->slock);
1260}
1261
1262static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1263{
1264 struct saa7146_fh *fh = file->private_data;
1265 struct saa7146_dev *dev = fh->dev;
1266 struct saa7146_vv *vv = dev->vv_data;
1267 ssize_t ret = 0;
1268
Joe Perches44d0b802011-08-21 19:56:44 -03001269 DEB_EE("called\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270
1271 if ((vv->video_status & STATUS_CAPTURE) != 0) {
1272 /* fixme: should we allow read() captures while streaming capture? */
1273 if (vv->video_fh == fh) {
Joe Perches44d0b802011-08-21 19:56:44 -03001274 DEB_S("already capturing\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 return -EBUSY;
1276 }
Joe Perches44d0b802011-08-21 19:56:44 -03001277 DEB_S("already capturing in another open\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 return -EBUSY;
1279 }
1280
1281 ret = video_begin(fh);
1282 if( 0 != ret) {
1283 goto out;
1284 }
1285
1286 ret = videobuf_read_one(&fh->video_q , data, count, ppos,
1287 file->f_flags & O_NONBLOCK);
1288 if (ret != 0) {
1289 video_end(fh, file);
1290 } else {
1291 ret = video_end(fh, file);
1292 }
1293out:
1294 /* restart overlay if it was active before */
1295 if (vv->ov_suspend != NULL) {
1296 saa7146_start_preview(vv->ov_suspend);
1297 vv->ov_suspend = NULL;
1298 }
1299
1300 return ret;
1301}
1302
1303struct saa7146_use_ops saa7146_video_uops = {
1304 .init = video_init,
1305 .open = video_open,
1306 .release = video_close,
1307 .irq_done = video_irq_done,
1308 .read = video_read,
1309};