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18
19#define CPIA_VERSION "3.0.1"
20
21#include <linux/module.h>
22#include <linux/time.h>
23#include <linux/sched.h>
24#include <linux/slab.h>
25#include <linux/init.h>
26#include <linux/videodev2.h>
27#include <linux/stringify.h>
28#include <media/v4l2-ioctl.h>
29#include <media/v4l2-event.h>
30
31#include "cpia2.h"
32
33static int video_nr = -1;
34module_param(video_nr, int, 0);
35MODULE_PARM_DESC(video_nr, "video device to register (0=/dev/video0, etc)");
36
37static int buffer_size = 68 * 1024;
38module_param(buffer_size, int, 0);
39MODULE_PARM_DESC(buffer_size, "Size for each frame buffer in bytes (default 68k)");
40
41static int num_buffers = 3;
42module_param(num_buffers, int, 0);
43MODULE_PARM_DESC(num_buffers, "Number of frame buffers (1-"
44 __stringify(VIDEO_MAX_FRAME) ", default 3)");
45
46static int alternate = DEFAULT_ALT;
47module_param(alternate, int, 0);
48MODULE_PARM_DESC(alternate, "USB Alternate (" __stringify(USBIF_ISO_1) "-"
49 __stringify(USBIF_ISO_6) ", default "
50 __stringify(DEFAULT_ALT) ")");
51
52static int flicker_mode;
53module_param(flicker_mode, int, 0);
54MODULE_PARM_DESC(flicker_mode, "Flicker frequency (0 (disabled), " __stringify(50) " or "
55 __stringify(60) ", default 0)");
56
57MODULE_AUTHOR("Steve Miller (STMicroelectronics) <steve.miller@st.com>");
58MODULE_DESCRIPTION("V4L-driver for STMicroelectronics CPiA2 based cameras");
59MODULE_SUPPORTED_DEVICE("video");
60MODULE_LICENSE("GPL");
61MODULE_VERSION(CPIA_VERSION);
62
63#define ABOUT "V4L-Driver for Vision CPiA2 based cameras"
64#define CPIA2_CID_USB_ALT (V4L2_CID_USER_BASE | 0xf000)
65
66
67
68
69
70
71static int cpia2_open(struct file *file)
72{
73 struct camera_data *cam = video_drvdata(file);
74 int retval;
75
76 if (mutex_lock_interruptible(&cam->v4l2_lock))
77 return -ERESTARTSYS;
78 retval = v4l2_fh_open(file);
79 if (retval)
80 goto open_unlock;
81
82 if (v4l2_fh_is_singular_file(file)) {
83 if (cpia2_allocate_buffers(cam)) {
84 v4l2_fh_release(file);
85 retval = -ENOMEM;
86 goto open_unlock;
87 }
88
89
90 if (cpia2_reset_camera(cam) < 0) {
91 v4l2_fh_release(file);
92 retval = -EIO;
93 goto open_unlock;
94 }
95
96 cam->APP_len = 0;
97 cam->COM_len = 0;
98 }
99
100 cpia2_dbg_dump_registers(cam);
101open_unlock:
102 mutex_unlock(&cam->v4l2_lock);
103 return retval;
104}
105
106
107
108
109
110
111static int cpia2_close(struct file *file)
112{
113 struct video_device *dev = video_devdata(file);
114 struct camera_data *cam = video_get_drvdata(dev);
115
116 mutex_lock(&cam->v4l2_lock);
117 if (video_is_registered(&cam->vdev) && v4l2_fh_is_singular_file(file)) {
118 cpia2_usb_stream_stop(cam);
119
120
121 cpia2_save_camera_state(cam);
122
123 cpia2_set_low_power(cam);
124 cpia2_free_buffers(cam);
125 }
126
127 if (cam->stream_fh == file->private_data) {
128 cam->stream_fh = NULL;
129 cam->mmapped = 0;
130 }
131 mutex_unlock(&cam->v4l2_lock);
132 return v4l2_fh_release(file);
133}
134
135
136
137
138
139
140static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count,
141 loff_t *off)
142{
143 struct camera_data *cam = video_drvdata(file);
144 int noblock = file->f_flags&O_NONBLOCK;
145 ssize_t ret;
146
147 if(!cam)
148 return -EINVAL;
149
150 if (mutex_lock_interruptible(&cam->v4l2_lock))
151 return -ERESTARTSYS;
152 ret = cpia2_read(cam, buf, count, noblock);
153 mutex_unlock(&cam->v4l2_lock);
154 return ret;
155}
156
157
158
159
160
161
162
163static __poll_t cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait)
164{
165 struct camera_data *cam = video_drvdata(filp);
166 __poll_t res;
167
168 mutex_lock(&cam->v4l2_lock);
169 res = cpia2_poll(cam, filp, wait);
170 mutex_unlock(&cam->v4l2_lock);
171 return res;
172}
173
174
175static int sync(struct camera_data *cam, int frame_nr)
176{
177 struct framebuf *frame = &cam->buffers[frame_nr];
178
179 while (1) {
180 if (frame->status == FRAME_READY)
181 return 0;
182
183 if (!cam->streaming) {
184 frame->status = FRAME_READY;
185 frame->length = 0;
186 return 0;
187 }
188
189 mutex_unlock(&cam->v4l2_lock);
190 wait_event_interruptible(cam->wq_stream,
191 !cam->streaming ||
192 frame->status == FRAME_READY);
193 mutex_lock(&cam->v4l2_lock);
194 if (signal_pending(current))
195 return -ERESTARTSYS;
196 if (!video_is_registered(&cam->vdev))
197 return -ENOTTY;
198 }
199}
200
201
202
203
204
205
206
207
208
209static int cpia2_querycap(struct file *file, void *fh, struct v4l2_capability *vc)
210{
211 struct camera_data *cam = video_drvdata(file);
212
213 strscpy(vc->driver, "cpia2", sizeof(vc->driver));
214
215 if (cam->params.pnp_id.product == 0x151)
216 strscpy(vc->card, "QX5 Microscope", sizeof(vc->card));
217 else
218 strscpy(vc->card, "CPiA2 Camera", sizeof(vc->card));
219 switch (cam->params.pnp_id.device_type) {
220 case DEVICE_STV_672:
221 strcat(vc->card, " (672/");
222 break;
223 case DEVICE_STV_676:
224 strcat(vc->card, " (676/");
225 break;
226 default:
227 strcat(vc->card, " (XXX/");
228 break;
229 }
230 switch (cam->params.version.sensor_flags) {
231 case CPIA2_VP_SENSOR_FLAGS_404:
232 strcat(vc->card, "404)");
233 break;
234 case CPIA2_VP_SENSOR_FLAGS_407:
235 strcat(vc->card, "407)");
236 break;
237 case CPIA2_VP_SENSOR_FLAGS_409:
238 strcat(vc->card, "409)");
239 break;
240 case CPIA2_VP_SENSOR_FLAGS_410:
241 strcat(vc->card, "410)");
242 break;
243 case CPIA2_VP_SENSOR_FLAGS_500:
244 strcat(vc->card, "500)");
245 break;
246 default:
247 strcat(vc->card, "XXX)");
248 break;
249 }
250
251 if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0)
252 memset(vc->bus_info,0, sizeof(vc->bus_info));
253 return 0;
254}
255
256
257
258
259
260
261
262
263
264static int cpia2_enum_input(struct file *file, void *fh, struct v4l2_input *i)
265{
266 if (i->index)
267 return -EINVAL;
268 strscpy(i->name, "Camera", sizeof(i->name));
269 i->type = V4L2_INPUT_TYPE_CAMERA;
270 return 0;
271}
272
273static int cpia2_g_input(struct file *file, void *fh, unsigned int *i)
274{
275 *i = 0;
276 return 0;
277}
278
279static int cpia2_s_input(struct file *file, void *fh, unsigned int i)
280{
281 return i ? -EINVAL : 0;
282}
283
284
285
286
287
288
289
290
291
292static int cpia2_enum_fmt_vid_cap(struct file *file, void *fh,
293 struct v4l2_fmtdesc *f)
294{
295 int index = f->index;
296
297 if (index < 0 || index > 1)
298 return -EINVAL;
299
300 memset(f, 0, sizeof(*f));
301 f->index = index;
302 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
303 f->flags = V4L2_FMT_FLAG_COMPRESSED;
304 switch(index) {
305 case 0:
306 strscpy(f->description, "MJPEG", sizeof(f->description));
307 f->pixelformat = V4L2_PIX_FMT_MJPEG;
308 break;
309 case 1:
310 strscpy(f->description, "JPEG", sizeof(f->description));
311 f->pixelformat = V4L2_PIX_FMT_JPEG;
312 break;
313 default:
314 return -EINVAL;
315 }
316
317 return 0;
318}
319
320
321
322
323
324
325
326
327
328static int cpia2_try_fmt_vid_cap(struct file *file, void *fh,
329 struct v4l2_format *f)
330{
331 struct camera_data *cam = video_drvdata(file);
332
333 if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG &&
334 f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
335 return -EINVAL;
336
337 f->fmt.pix.field = V4L2_FIELD_NONE;
338 f->fmt.pix.bytesperline = 0;
339 f->fmt.pix.sizeimage = cam->frame_size;
340 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
341 f->fmt.pix.priv = 0;
342
343 switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
344 case VIDEOSIZE_VGA:
345 f->fmt.pix.width = 640;
346 f->fmt.pix.height = 480;
347 break;
348 case VIDEOSIZE_CIF:
349 f->fmt.pix.width = 352;
350 f->fmt.pix.height = 288;
351 break;
352 case VIDEOSIZE_QVGA:
353 f->fmt.pix.width = 320;
354 f->fmt.pix.height = 240;
355 break;
356 case VIDEOSIZE_288_216:
357 f->fmt.pix.width = 288;
358 f->fmt.pix.height = 216;
359 break;
360 case VIDEOSIZE_256_192:
361 f->fmt.pix.width = 256;
362 f->fmt.pix.height = 192;
363 break;
364 case VIDEOSIZE_224_168:
365 f->fmt.pix.width = 224;
366 f->fmt.pix.height = 168;
367 break;
368 case VIDEOSIZE_192_144:
369 f->fmt.pix.width = 192;
370 f->fmt.pix.height = 144;
371 break;
372 case VIDEOSIZE_QCIF:
373 default:
374 f->fmt.pix.width = 176;
375 f->fmt.pix.height = 144;
376 break;
377 }
378
379 return 0;
380}
381
382
383
384
385
386
387
388
389
390static int cpia2_s_fmt_vid_cap(struct file *file, void *_fh,
391 struct v4l2_format *f)
392{
393 struct camera_data *cam = video_drvdata(file);
394 int err, frame;
395
396 err = cpia2_try_fmt_vid_cap(file, _fh, f);
397 if(err != 0)
398 return err;
399
400 cam->pixelformat = f->fmt.pix.pixelformat;
401
402
403
404 cam->params.compression.inhibit_htables = 0;
405
406
407
408
409
410 DBG("Requested width = %d, height = %d\n",
411 f->fmt.pix.width, f->fmt.pix.height);
412 if (f->fmt.pix.width != cam->width ||
413 f->fmt.pix.height != cam->height) {
414 cam->width = f->fmt.pix.width;
415 cam->height = f->fmt.pix.height;
416 cam->params.roi.width = f->fmt.pix.width;
417 cam->params.roi.height = f->fmt.pix.height;
418 cpia2_set_format(cam);
419 }
420
421 for (frame = 0; frame < cam->num_frames; ++frame) {
422 if (cam->buffers[frame].status == FRAME_READING)
423 if ((err = sync(cam, frame)) < 0)
424 return err;
425
426 cam->buffers[frame].status = FRAME_EMPTY;
427 }
428
429 return 0;
430}
431
432
433
434
435
436
437
438
439
440static int cpia2_g_fmt_vid_cap(struct file *file, void *fh,
441 struct v4l2_format *f)
442{
443 struct camera_data *cam = video_drvdata(file);
444
445 f->fmt.pix.width = cam->width;
446 f->fmt.pix.height = cam->height;
447 f->fmt.pix.pixelformat = cam->pixelformat;
448 f->fmt.pix.field = V4L2_FIELD_NONE;
449 f->fmt.pix.bytesperline = 0;
450 f->fmt.pix.sizeimage = cam->frame_size;
451 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
452 f->fmt.pix.priv = 0;
453
454 return 0;
455}
456
457
458
459
460
461
462
463
464
465
466static int cpia2_g_selection(struct file *file, void *fh,
467 struct v4l2_selection *s)
468{
469 struct camera_data *cam = video_drvdata(file);
470
471 if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
472 return -EINVAL;
473
474 switch (s->target) {
475 case V4L2_SEL_TGT_CROP_BOUNDS:
476 case V4L2_SEL_TGT_CROP_DEFAULT:
477 s->r.left = 0;
478 s->r.top = 0;
479 s->r.width = cam->width;
480 s->r.height = cam->height;
481 break;
482 default:
483 return -EINVAL;
484 }
485 return 0;
486}
487
488struct framerate_info {
489 int value;
490 struct v4l2_fract period;
491};
492
493static const struct framerate_info framerate_controls[] = {
494 { CPIA2_VP_FRAMERATE_6_25, { 4, 25 } },
495 { CPIA2_VP_FRAMERATE_7_5, { 2, 15 } },
496 { CPIA2_VP_FRAMERATE_12_5, { 2, 25 } },
497 { CPIA2_VP_FRAMERATE_15, { 1, 15 } },
498 { CPIA2_VP_FRAMERATE_25, { 1, 25 } },
499 { CPIA2_VP_FRAMERATE_30, { 1, 30 } },
500};
501
502static int cpia2_g_parm(struct file *file, void *fh, struct v4l2_streamparm *p)
503{
504 struct camera_data *cam = video_drvdata(file);
505 struct v4l2_captureparm *cap = &p->parm.capture;
506 int i;
507
508 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
509 return -EINVAL;
510
511 cap->capability = V4L2_CAP_TIMEPERFRAME;
512 cap->readbuffers = cam->num_frames;
513 for (i = 0; i < ARRAY_SIZE(framerate_controls); i++)
514 if (cam->params.vp_params.frame_rate == framerate_controls[i].value) {
515 cap->timeperframe = framerate_controls[i].period;
516 break;
517 }
518 return 0;
519}
520
521static int cpia2_s_parm(struct file *file, void *fh, struct v4l2_streamparm *p)
522{
523 struct camera_data *cam = video_drvdata(file);
524 struct v4l2_captureparm *cap = &p->parm.capture;
525 struct v4l2_fract tpf = cap->timeperframe;
526 int max = ARRAY_SIZE(framerate_controls) - 1;
527 int ret;
528 int i;
529
530 ret = cpia2_g_parm(file, fh, p);
531 if (ret || !tpf.denominator || !tpf.numerator)
532 return ret;
533
534
535 if (cam->params.pnp_id.device_type == DEVICE_STV_672 &&
536 cam->params.version.sensor_flags == CPIA2_VP_SENSOR_FLAGS_500)
537 max -= 2;
538 for (i = 0; i <= max; i++) {
539 struct v4l2_fract f1 = tpf;
540 struct v4l2_fract f2 = framerate_controls[i].period;
541
542 f1.numerator *= f2.denominator;
543 f2.numerator *= f1.denominator;
544 if (f1.numerator >= f2.numerator)
545 break;
546 }
547 if (i > max)
548 i = max;
549 cap->timeperframe = framerate_controls[i].period;
550 return cpia2_set_fps(cam, framerate_controls[i].value);
551}
552
553static const struct {
554 u32 width;
555 u32 height;
556} cpia2_framesizes[] = {
557 { 640, 480 },
558 { 352, 288 },
559 { 320, 240 },
560 { 288, 216 },
561 { 256, 192 },
562 { 224, 168 },
563 { 192, 144 },
564 { 176, 144 },
565};
566
567static int cpia2_enum_framesizes(struct file *file, void *fh,
568 struct v4l2_frmsizeenum *fsize)
569{
570
571 if (fsize->pixel_format != V4L2_PIX_FMT_MJPEG &&
572 fsize->pixel_format != V4L2_PIX_FMT_JPEG)
573 return -EINVAL;
574 if (fsize->index >= ARRAY_SIZE(cpia2_framesizes))
575 return -EINVAL;
576 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
577 fsize->discrete.width = cpia2_framesizes[fsize->index].width;
578 fsize->discrete.height = cpia2_framesizes[fsize->index].height;
579
580 return 0;
581}
582
583static int cpia2_enum_frameintervals(struct file *file, void *fh,
584 struct v4l2_frmivalenum *fival)
585{
586 struct camera_data *cam = video_drvdata(file);
587 int max = ARRAY_SIZE(framerate_controls) - 1;
588 int i;
589
590 if (fival->pixel_format != V4L2_PIX_FMT_MJPEG &&
591 fival->pixel_format != V4L2_PIX_FMT_JPEG)
592 return -EINVAL;
593
594
595 if (cam->params.pnp_id.device_type == DEVICE_STV_672 &&
596 cam->params.version.sensor_flags == CPIA2_VP_SENSOR_FLAGS_500)
597 max -= 2;
598 if (fival->index > max)
599 return -EINVAL;
600 for (i = 0; i < ARRAY_SIZE(cpia2_framesizes); i++)
601 if (fival->width == cpia2_framesizes[i].width &&
602 fival->height == cpia2_framesizes[i].height)
603 break;
604 if (i == ARRAY_SIZE(cpia2_framesizes))
605 return -EINVAL;
606 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
607 fival->discrete = framerate_controls[fival->index].period;
608 return 0;
609}
610
611
612
613
614
615
616
617
618
619static int cpia2_s_ctrl(struct v4l2_ctrl *ctrl)
620{
621 struct camera_data *cam =
622 container_of(ctrl->handler, struct camera_data, hdl);
623 static const int flicker_table[] = {
624 NEVER_FLICKER,
625 FLICKER_50,
626 FLICKER_60,
627 };
628
629 DBG("Set control id:%d, value:%d\n", ctrl->id, ctrl->val);
630
631 switch (ctrl->id) {
632 case V4L2_CID_BRIGHTNESS:
633 cpia2_set_brightness(cam, ctrl->val);
634 break;
635 case V4L2_CID_CONTRAST:
636 cpia2_set_contrast(cam, ctrl->val);
637 break;
638 case V4L2_CID_SATURATION:
639 cpia2_set_saturation(cam, ctrl->val);
640 break;
641 case V4L2_CID_HFLIP:
642 cpia2_set_property_mirror(cam, ctrl->val);
643 break;
644 case V4L2_CID_VFLIP:
645 cpia2_set_property_flip(cam, ctrl->val);
646 break;
647 case V4L2_CID_POWER_LINE_FREQUENCY:
648 return cpia2_set_flicker_mode(cam, flicker_table[ctrl->val]);
649 case V4L2_CID_ILLUMINATORS_1:
650 return cpia2_set_gpio(cam, (cam->top_light->val << 6) |
651 (cam->bottom_light->val << 7));
652 case V4L2_CID_JPEG_ACTIVE_MARKER:
653 cam->params.compression.inhibit_htables =
654 !(ctrl->val & V4L2_JPEG_ACTIVE_MARKER_DHT);
655 break;
656 case V4L2_CID_JPEG_COMPRESSION_QUALITY:
657 cam->params.vc_params.quality = ctrl->val;
658 break;
659 case CPIA2_CID_USB_ALT:
660 cam->params.camera_state.stream_mode = ctrl->val;
661 break;
662 default:
663 return -EINVAL;
664 }
665
666 return 0;
667}
668
669
670
671
672
673
674
675
676
677static int cpia2_g_jpegcomp(struct file *file, void *fh, struct v4l2_jpegcompression *parms)
678{
679 struct camera_data *cam = video_drvdata(file);
680
681 memset(parms, 0, sizeof(*parms));
682
683 parms->quality = 80;
684
685 parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI;
686 if(!cam->params.compression.inhibit_htables) {
687 parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT;
688 }
689
690 parms->APPn = cam->APPn;
691 parms->APP_len = cam->APP_len;
692 if(cam->APP_len > 0) {
693 memcpy(parms->APP_data, cam->APP_data, cam->APP_len);
694 parms->jpeg_markers |= V4L2_JPEG_MARKER_APP;
695 }
696
697 parms->COM_len = cam->COM_len;
698 if(cam->COM_len > 0) {
699 memcpy(parms->COM_data, cam->COM_data, cam->COM_len);
700 parms->jpeg_markers |= JPEG_MARKER_COM;
701 }
702
703 DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n",
704 parms->APP_len, parms->COM_len);
705
706 return 0;
707}
708
709
710
711
712
713
714
715
716
717
718static int cpia2_s_jpegcomp(struct file *file, void *fh,
719 const struct v4l2_jpegcompression *parms)
720{
721 struct camera_data *cam = video_drvdata(file);
722
723 DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n",
724 parms->APP_len, parms->COM_len);
725
726 cam->params.compression.inhibit_htables =
727 !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
728
729 if(parms->APP_len != 0) {
730 if(parms->APP_len > 0 &&
731 parms->APP_len <= sizeof(cam->APP_data) &&
732 parms->APPn >= 0 && parms->APPn <= 15) {
733 cam->APPn = parms->APPn;
734 cam->APP_len = parms->APP_len;
735 memcpy(cam->APP_data, parms->APP_data, parms->APP_len);
736 } else {
737 LOG("Bad APPn Params n=%d len=%d\n",
738 parms->APPn, parms->APP_len);
739 return -EINVAL;
740 }
741 } else {
742 cam->APP_len = 0;
743 }
744
745 if(parms->COM_len != 0) {
746 if(parms->COM_len > 0 &&
747 parms->COM_len <= sizeof(cam->COM_data)) {
748 cam->COM_len = parms->COM_len;
749 memcpy(cam->COM_data, parms->COM_data, parms->COM_len);
750 } else {
751 LOG("Bad COM_len=%d\n", parms->COM_len);
752 return -EINVAL;
753 }
754 }
755
756 return 0;
757}
758
759
760
761
762
763
764
765
766
767
768static int cpia2_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *req)
769{
770 struct camera_data *cam = video_drvdata(file);
771
772 if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
773 req->memory != V4L2_MEMORY_MMAP)
774 return -EINVAL;
775
776 DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames);
777 req->count = cam->num_frames;
778 memset(&req->reserved, 0, sizeof(req->reserved));
779
780 return 0;
781}
782
783
784
785
786
787
788
789
790
791static int cpia2_querybuf(struct file *file, void *fh, struct v4l2_buffer *buf)
792{
793 struct camera_data *cam = video_drvdata(file);
794
795 if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
796 buf->index >= cam->num_frames)
797 return -EINVAL;
798
799 buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
800 buf->length = cam->frame_size;
801
802 buf->memory = V4L2_MEMORY_MMAP;
803
804 if(cam->mmapped)
805 buf->flags = V4L2_BUF_FLAG_MAPPED;
806 else
807 buf->flags = 0;
808
809 buf->flags |= V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
810
811 switch (cam->buffers[buf->index].status) {
812 case FRAME_EMPTY:
813 case FRAME_ERROR:
814 case FRAME_READING:
815 buf->bytesused = 0;
816 buf->flags = V4L2_BUF_FLAG_QUEUED;
817 break;
818 case FRAME_READY:
819 buf->bytesused = cam->buffers[buf->index].length;
820 buf->timestamp = ns_to_timeval(cam->buffers[buf->index].ts);
821 buf->sequence = cam->buffers[buf->index].seq;
822 buf->flags = V4L2_BUF_FLAG_DONE;
823 break;
824 }
825
826 DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n",
827 buf->index, buf->m.offset, buf->flags, buf->sequence,
828 buf->bytesused);
829
830 return 0;
831}
832
833
834
835
836
837
838
839
840
841static int cpia2_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
842{
843 struct camera_data *cam = video_drvdata(file);
844
845 if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
846 buf->memory != V4L2_MEMORY_MMAP ||
847 buf->index >= cam->num_frames)
848 return -EINVAL;
849
850 DBG("QBUF #%d\n", buf->index);
851
852 if(cam->buffers[buf->index].status == FRAME_READY)
853 cam->buffers[buf->index].status = FRAME_EMPTY;
854
855 return 0;
856}
857
858
859
860
861
862
863
864
865
866static int find_earliest_filled_buffer(struct camera_data *cam)
867{
868 int i;
869 int found = -1;
870 for (i=0; i<cam->num_frames; i++) {
871 if(cam->buffers[i].status == FRAME_READY) {
872 if(found < 0) {
873 found = i;
874 } else {
875
876 if (cam->buffers[i].ts < cam->buffers[found].ts)
877 found = i;
878 }
879 }
880 }
881 return found;
882}
883
884
885
886
887
888
889
890
891
892static int cpia2_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
893{
894 struct camera_data *cam = video_drvdata(file);
895 int frame;
896
897 if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
898 buf->memory != V4L2_MEMORY_MMAP)
899 return -EINVAL;
900
901 frame = find_earliest_filled_buffer(cam);
902
903 if(frame < 0 && file->f_flags&O_NONBLOCK)
904 return -EAGAIN;
905
906 if(frame < 0) {
907
908 struct framebuf *cb=cam->curbuff;
909 mutex_unlock(&cam->v4l2_lock);
910 wait_event_interruptible(cam->wq_stream,
911 !video_is_registered(&cam->vdev) ||
912 (cb=cam->curbuff)->status == FRAME_READY);
913 mutex_lock(&cam->v4l2_lock);
914 if (signal_pending(current))
915 return -ERESTARTSYS;
916 if (!video_is_registered(&cam->vdev))
917 return -ENOTTY;
918 frame = cb->num;
919 }
920
921
922 buf->index = frame;
923 buf->bytesused = cam->buffers[buf->index].length;
924 buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE
925 | V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
926 buf->field = V4L2_FIELD_NONE;
927 buf->timestamp = ns_to_timeval(cam->buffers[buf->index].ts);
928 buf->sequence = cam->buffers[buf->index].seq;
929 buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
930 buf->length = cam->frame_size;
931 buf->reserved2 = 0;
932 buf->request_fd = 0;
933 memset(&buf->timecode, 0, sizeof(buf->timecode));
934
935 DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index,
936 cam->buffers[buf->index].status, buf->sequence, buf->bytesused);
937
938 return 0;
939}
940
941static int cpia2_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
942{
943 struct camera_data *cam = video_drvdata(file);
944 int ret = -EINVAL;
945
946 DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming);
947 if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
948 return -EINVAL;
949
950 if (!cam->streaming) {
951 ret = cpia2_usb_stream_start(cam,
952 cam->params.camera_state.stream_mode);
953 if (!ret)
954 v4l2_ctrl_grab(cam->usb_alt, true);
955 }
956 return ret;
957}
958
959static int cpia2_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
960{
961 struct camera_data *cam = video_drvdata(file);
962 int ret = -EINVAL;
963
964 DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming);
965 if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
966 return -EINVAL;
967
968 if (cam->streaming) {
969 ret = cpia2_usb_stream_stop(cam);
970 if (!ret)
971 v4l2_ctrl_grab(cam->usb_alt, false);
972 }
973 return ret;
974}
975
976
977
978
979
980
981static int cpia2_mmap(struct file *file, struct vm_area_struct *area)
982{
983 struct camera_data *cam = video_drvdata(file);
984 int retval;
985
986 if (mutex_lock_interruptible(&cam->v4l2_lock))
987 return -ERESTARTSYS;
988 retval = cpia2_remap_buffer(cam, area);
989
990 if(!retval)
991 cam->stream_fh = file->private_data;
992 mutex_unlock(&cam->v4l2_lock);
993 return retval;
994}
995
996
997
998
999
1000
1001
1002static void reset_camera_struct_v4l(struct camera_data *cam)
1003{
1004 cam->width = cam->params.roi.width;
1005 cam->height = cam->params.roi.height;
1006
1007 cam->frame_size = buffer_size;
1008 cam->num_frames = num_buffers;
1009
1010
1011 cam->params.flicker_control.flicker_mode_req = flicker_mode;
1012
1013
1014 cam->params.camera_state.stream_mode = alternate;
1015
1016 cam->pixelformat = V4L2_PIX_FMT_JPEG;
1017}
1018
1019static const struct v4l2_ioctl_ops cpia2_ioctl_ops = {
1020 .vidioc_querycap = cpia2_querycap,
1021 .vidioc_enum_input = cpia2_enum_input,
1022 .vidioc_g_input = cpia2_g_input,
1023 .vidioc_s_input = cpia2_s_input,
1024 .vidioc_enum_fmt_vid_cap = cpia2_enum_fmt_vid_cap,
1025 .vidioc_g_fmt_vid_cap = cpia2_g_fmt_vid_cap,
1026 .vidioc_s_fmt_vid_cap = cpia2_s_fmt_vid_cap,
1027 .vidioc_try_fmt_vid_cap = cpia2_try_fmt_vid_cap,
1028 .vidioc_g_jpegcomp = cpia2_g_jpegcomp,
1029 .vidioc_s_jpegcomp = cpia2_s_jpegcomp,
1030 .vidioc_g_selection = cpia2_g_selection,
1031 .vidioc_reqbufs = cpia2_reqbufs,
1032 .vidioc_querybuf = cpia2_querybuf,
1033 .vidioc_qbuf = cpia2_qbuf,
1034 .vidioc_dqbuf = cpia2_dqbuf,
1035 .vidioc_streamon = cpia2_streamon,
1036 .vidioc_streamoff = cpia2_streamoff,
1037 .vidioc_s_parm = cpia2_s_parm,
1038 .vidioc_g_parm = cpia2_g_parm,
1039 .vidioc_enum_framesizes = cpia2_enum_framesizes,
1040 .vidioc_enum_frameintervals = cpia2_enum_frameintervals,
1041 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1042 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1043};
1044
1045
1046
1047
1048static const struct v4l2_file_operations cpia2_fops = {
1049 .owner = THIS_MODULE,
1050 .open = cpia2_open,
1051 .release = cpia2_close,
1052 .read = cpia2_v4l_read,
1053 .poll = cpia2_v4l_poll,
1054 .unlocked_ioctl = video_ioctl2,
1055 .mmap = cpia2_mmap,
1056};
1057
1058static const struct video_device cpia2_template = {
1059
1060 .name = "CPiA2 Camera",
1061 .fops = &cpia2_fops,
1062 .ioctl_ops = &cpia2_ioctl_ops,
1063 .release = video_device_release_empty,
1064};
1065
1066void cpia2_camera_release(struct v4l2_device *v4l2_dev)
1067{
1068 struct camera_data *cam =
1069 container_of(v4l2_dev, struct camera_data, v4l2_dev);
1070
1071 v4l2_ctrl_handler_free(&cam->hdl);
1072 v4l2_device_unregister(&cam->v4l2_dev);
1073 kfree(cam);
1074}
1075
1076static const struct v4l2_ctrl_ops cpia2_ctrl_ops = {
1077 .s_ctrl = cpia2_s_ctrl,
1078};
1079
1080
1081
1082
1083
1084
1085int cpia2_register_camera(struct camera_data *cam)
1086{
1087 struct v4l2_ctrl_handler *hdl = &cam->hdl;
1088 struct v4l2_ctrl_config cpia2_usb_alt = {
1089 .ops = &cpia2_ctrl_ops,
1090 .id = CPIA2_CID_USB_ALT,
1091 .name = "USB Alternate",
1092 .type = V4L2_CTRL_TYPE_INTEGER,
1093 .min = USBIF_ISO_1,
1094 .max = USBIF_ISO_6,
1095 .step = 1,
1096 };
1097 int ret;
1098
1099 v4l2_ctrl_handler_init(hdl, 12);
1100 v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1101 V4L2_CID_BRIGHTNESS,
1102 cam->params.pnp_id.device_type == DEVICE_STV_672 ? 1 : 0,
1103 255, 1, DEFAULT_BRIGHTNESS);
1104 v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1105 V4L2_CID_CONTRAST, 0, 255, 1, DEFAULT_CONTRAST);
1106 v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1107 V4L2_CID_SATURATION, 0, 255, 1, DEFAULT_SATURATION);
1108 v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1109 V4L2_CID_HFLIP, 0, 1, 1, 0);
1110 v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1111 V4L2_CID_JPEG_ACTIVE_MARKER, 0,
1112 V4L2_JPEG_ACTIVE_MARKER_DHT, 0,
1113 V4L2_JPEG_ACTIVE_MARKER_DHT);
1114 v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1115 V4L2_CID_JPEG_COMPRESSION_QUALITY, 1,
1116 100, 1, 100);
1117 cpia2_usb_alt.def = alternate;
1118 cam->usb_alt = v4l2_ctrl_new_custom(hdl, &cpia2_usb_alt, NULL);
1119
1120 if (cam->params.pnp_id.device_type != DEVICE_STV_672)
1121 v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1122 V4L2_CID_VFLIP, 0, 1, 1, 0);
1123
1124 if (cam->params.pnp_id.device_type == DEVICE_STV_672)
1125 v4l2_ctrl_new_std_menu(hdl, &cpia2_ctrl_ops,
1126 V4L2_CID_POWER_LINE_FREQUENCY,
1127 V4L2_CID_POWER_LINE_FREQUENCY_60HZ, 0, 0);
1128
1129 if (cam->params.pnp_id.product == 0x151) {
1130 cam->top_light = v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1131 V4L2_CID_ILLUMINATORS_1, 0, 1, 1, 0);
1132 cam->bottom_light = v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1133 V4L2_CID_ILLUMINATORS_2, 0, 1, 1, 0);
1134 v4l2_ctrl_cluster(2, &cam->top_light);
1135 }
1136
1137 if (hdl->error) {
1138 ret = hdl->error;
1139 v4l2_ctrl_handler_free(hdl);
1140 return ret;
1141 }
1142
1143 cam->vdev = cpia2_template;
1144 video_set_drvdata(&cam->vdev, cam);
1145 cam->vdev.lock = &cam->v4l2_lock;
1146 cam->vdev.ctrl_handler = hdl;
1147 cam->vdev.v4l2_dev = &cam->v4l2_dev;
1148 cam->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
1149 V4L2_CAP_STREAMING;
1150
1151 reset_camera_struct_v4l(cam);
1152
1153
1154 if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
1155 ERR("video_register_device failed\n");
1156 return -ENODEV;
1157 }
1158
1159 return 0;
1160}
1161
1162
1163
1164
1165
1166
1167void cpia2_unregister_camera(struct camera_data *cam)
1168{
1169 video_unregister_device(&cam->vdev);
1170}
1171
1172
1173
1174
1175
1176
1177
1178static void __init check_parameters(void)
1179{
1180 if(buffer_size < PAGE_SIZE) {
1181 buffer_size = PAGE_SIZE;
1182 LOG("buffer_size too small, setting to %d\n", buffer_size);
1183 } else if(buffer_size > 1024*1024) {
1184
1185 buffer_size = 1024*1024;
1186 LOG("buffer_size ridiculously large, setting to %d\n",
1187 buffer_size);
1188 } else {
1189 buffer_size += PAGE_SIZE-1;
1190 buffer_size &= ~(PAGE_SIZE-1);
1191 }
1192
1193 if(num_buffers < 1) {
1194 num_buffers = 1;
1195 LOG("num_buffers too small, setting to %d\n", num_buffers);
1196 } else if(num_buffers > VIDEO_MAX_FRAME) {
1197 num_buffers = VIDEO_MAX_FRAME;
1198 LOG("num_buffers too large, setting to %d\n", num_buffers);
1199 }
1200
1201 if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) {
1202 alternate = DEFAULT_ALT;
1203 LOG("alternate specified is invalid, using %d\n", alternate);
1204 }
1205
1206 if (flicker_mode != 0 && flicker_mode != FLICKER_50 && flicker_mode != FLICKER_60) {
1207 flicker_mode = 0;
1208 LOG("Flicker mode specified is invalid, using %d\n",
1209 flicker_mode);
1210 }
1211
1212 DBG("Using %d buffers, each %d bytes, alternate=%d\n",
1213 num_buffers, buffer_size, alternate);
1214}
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224static int __init cpia2_init(void)
1225{
1226 LOG("%s v%s\n",
1227 ABOUT, CPIA_VERSION);
1228 check_parameters();
1229 return cpia2_usb_init();
1230}
1231
1232
1233
1234
1235
1236
1237
1238static void __exit cpia2_exit(void)
1239{
1240 cpia2_usb_cleanup();
1241 schedule_timeout(2 * HZ);
1242}
1243
1244module_init(cpia2_init);
1245module_exit(cpia2_exit);
1246
