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26
27
28#define CPIA_VERSION "3.0.1"
29
30#include <linux/module.h>
31#include <linux/time.h>
32#include <linux/sched.h>
33#include <linux/slab.h>
34#include <linux/init.h>
35#include <linux/videodev2.h>
36#include <linux/stringify.h>
37#include <media/v4l2-ioctl.h>
38#include <media/v4l2-event.h>
39
40#include "cpia2.h"
41
42static int video_nr = -1;
43module_param(video_nr, int, 0);
44MODULE_PARM_DESC(video_nr, "video device to register (0=/dev/video0, etc)");
45
46static int buffer_size = 68 * 1024;
47module_param(buffer_size, int, 0);
48MODULE_PARM_DESC(buffer_size, "Size for each frame buffer in bytes (default 68k)");
49
50static int num_buffers = 3;
51module_param(num_buffers, int, 0);
52MODULE_PARM_DESC(num_buffers, "Number of frame buffers (1-"
53 __stringify(VIDEO_MAX_FRAME) ", default 3)");
54
55static int alternate = DEFAULT_ALT;
56module_param(alternate, int, 0);
57MODULE_PARM_DESC(alternate, "USB Alternate (" __stringify(USBIF_ISO_1) "-"
58 __stringify(USBIF_ISO_6) ", default "
59 __stringify(DEFAULT_ALT) ")");
60
61static int flicker_mode;
62module_param(flicker_mode, int, 0);
63MODULE_PARM_DESC(flicker_mode, "Flicker frequency (0 (disabled), " __stringify(50) " or "
64 __stringify(60) ", default 0)");
65
66MODULE_AUTHOR("Steve Miller (STMicroelectronics) <steve.miller@st.com>");
67MODULE_DESCRIPTION("V4L-driver for STMicroelectronics CPiA2 based cameras");
68MODULE_SUPPORTED_DEVICE("video");
69MODULE_LICENSE("GPL");
70MODULE_VERSION(CPIA_VERSION);
71
72#define ABOUT "V4L-Driver for Vision CPiA2 based cameras"
73#define CPIA2_CID_USB_ALT (V4L2_CID_USER_BASE | 0xf000)
74
75
76
77
78
79
80static int cpia2_open(struct file *file)
81{
82 struct camera_data *cam = video_drvdata(file);
83 int retval;
84
85 if (mutex_lock_interruptible(&cam->v4l2_lock))
86 return -ERESTARTSYS;
87 retval = v4l2_fh_open(file);
88 if (retval)
89 goto open_unlock;
90
91 if (v4l2_fh_is_singular_file(file)) {
92 if (cpia2_allocate_buffers(cam)) {
93 v4l2_fh_release(file);
94 retval = -ENOMEM;
95 goto open_unlock;
96 }
97
98
99 if (cpia2_reset_camera(cam) < 0) {
100 v4l2_fh_release(file);
101 retval = -EIO;
102 goto open_unlock;
103 }
104
105 cam->APP_len = 0;
106 cam->COM_len = 0;
107 }
108
109 cpia2_dbg_dump_registers(cam);
110open_unlock:
111 mutex_unlock(&cam->v4l2_lock);
112 return retval;
113}
114
115
116
117
118
119
120static int cpia2_close(struct file *file)
121{
122 struct video_device *dev = video_devdata(file);
123 struct camera_data *cam = video_get_drvdata(dev);
124
125 mutex_lock(&cam->v4l2_lock);
126 if (video_is_registered(&cam->vdev) && v4l2_fh_is_singular_file(file)) {
127 cpia2_usb_stream_stop(cam);
128
129
130 cpia2_save_camera_state(cam);
131
132 cpia2_set_low_power(cam);
133 cpia2_free_buffers(cam);
134 }
135
136 if (cam->stream_fh == file->private_data) {
137 cam->stream_fh = NULL;
138 cam->mmapped = 0;
139 }
140 mutex_unlock(&cam->v4l2_lock);
141 return v4l2_fh_release(file);
142}
143
144
145
146
147
148
149static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count,
150 loff_t *off)
151{
152 struct camera_data *cam = video_drvdata(file);
153 int noblock = file->f_flags&O_NONBLOCK;
154 ssize_t ret;
155
156 if(!cam)
157 return -EINVAL;
158
159 if (mutex_lock_interruptible(&cam->v4l2_lock))
160 return -ERESTARTSYS;
161 ret = cpia2_read(cam, buf, count, noblock);
162 mutex_unlock(&cam->v4l2_lock);
163 return ret;
164}
165
166
167
168
169
170
171
172static __poll_t cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait)
173{
174 struct camera_data *cam = video_drvdata(filp);
175 __poll_t res;
176
177 mutex_lock(&cam->v4l2_lock);
178 res = cpia2_poll(cam, filp, wait);
179 mutex_unlock(&cam->v4l2_lock);
180 return res;
181}
182
183
184static int sync(struct camera_data *cam, int frame_nr)
185{
186 struct framebuf *frame = &cam->buffers[frame_nr];
187
188 while (1) {
189 if (frame->status == FRAME_READY)
190 return 0;
191
192 if (!cam->streaming) {
193 frame->status = FRAME_READY;
194 frame->length = 0;
195 return 0;
196 }
197
198 mutex_unlock(&cam->v4l2_lock);
199 wait_event_interruptible(cam->wq_stream,
200 !cam->streaming ||
201 frame->status == FRAME_READY);
202 mutex_lock(&cam->v4l2_lock);
203 if (signal_pending(current))
204 return -ERESTARTSYS;
205 if (!video_is_registered(&cam->vdev))
206 return -ENOTTY;
207 }
208}
209
210
211
212
213
214
215
216
217
218static int cpia2_querycap(struct file *file, void *fh, struct v4l2_capability *vc)
219{
220 struct camera_data *cam = video_drvdata(file);
221
222 strscpy(vc->driver, "cpia2", sizeof(vc->driver));
223
224 if (cam->params.pnp_id.product == 0x151)
225 strscpy(vc->card, "QX5 Microscope", sizeof(vc->card));
226 else
227 strscpy(vc->card, "CPiA2 Camera", sizeof(vc->card));
228 switch (cam->params.pnp_id.device_type) {
229 case DEVICE_STV_672:
230 strcat(vc->card, " (672/");
231 break;
232 case DEVICE_STV_676:
233 strcat(vc->card, " (676/");
234 break;
235 default:
236 strcat(vc->card, " (XXX/");
237 break;
238 }
239 switch (cam->params.version.sensor_flags) {
240 case CPIA2_VP_SENSOR_FLAGS_404:
241 strcat(vc->card, "404)");
242 break;
243 case CPIA2_VP_SENSOR_FLAGS_407:
244 strcat(vc->card, "407)");
245 break;
246 case CPIA2_VP_SENSOR_FLAGS_409:
247 strcat(vc->card, "409)");
248 break;
249 case CPIA2_VP_SENSOR_FLAGS_410:
250 strcat(vc->card, "410)");
251 break;
252 case CPIA2_VP_SENSOR_FLAGS_500:
253 strcat(vc->card, "500)");
254 break;
255 default:
256 strcat(vc->card, "XXX)");
257 break;
258 }
259
260 if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0)
261 memset(vc->bus_info,0, sizeof(vc->bus_info));
262
263 vc->device_caps = V4L2_CAP_VIDEO_CAPTURE |
264 V4L2_CAP_READWRITE |
265 V4L2_CAP_STREAMING;
266 vc->capabilities = vc->device_caps |
267 V4L2_CAP_DEVICE_CAPS;
268
269 return 0;
270}
271
272
273
274
275
276
277
278
279
280static int cpia2_enum_input(struct file *file, void *fh, struct v4l2_input *i)
281{
282 if (i->index)
283 return -EINVAL;
284 strscpy(i->name, "Camera", sizeof(i->name));
285 i->type = V4L2_INPUT_TYPE_CAMERA;
286 return 0;
287}
288
289static int cpia2_g_input(struct file *file, void *fh, unsigned int *i)
290{
291 *i = 0;
292 return 0;
293}
294
295static int cpia2_s_input(struct file *file, void *fh, unsigned int i)
296{
297 return i ? -EINVAL : 0;
298}
299
300
301
302
303
304
305
306
307
308static int cpia2_enum_fmt_vid_cap(struct file *file, void *fh,
309 struct v4l2_fmtdesc *f)
310{
311 int index = f->index;
312
313 if (index < 0 || index > 1)
314 return -EINVAL;
315
316 memset(f, 0, sizeof(*f));
317 f->index = index;
318 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
319 f->flags = V4L2_FMT_FLAG_COMPRESSED;
320 switch(index) {
321 case 0:
322 strscpy(f->description, "MJPEG", sizeof(f->description));
323 f->pixelformat = V4L2_PIX_FMT_MJPEG;
324 break;
325 case 1:
326 strscpy(f->description, "JPEG", sizeof(f->description));
327 f->pixelformat = V4L2_PIX_FMT_JPEG;
328 break;
329 default:
330 return -EINVAL;
331 }
332
333 return 0;
334}
335
336
337
338
339
340
341
342
343
344static int cpia2_try_fmt_vid_cap(struct file *file, void *fh,
345 struct v4l2_format *f)
346{
347 struct camera_data *cam = video_drvdata(file);
348
349 if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG &&
350 f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
351 return -EINVAL;
352
353 f->fmt.pix.field = V4L2_FIELD_NONE;
354 f->fmt.pix.bytesperline = 0;
355 f->fmt.pix.sizeimage = cam->frame_size;
356 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
357 f->fmt.pix.priv = 0;
358
359 switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
360 case VIDEOSIZE_VGA:
361 f->fmt.pix.width = 640;
362 f->fmt.pix.height = 480;
363 break;
364 case VIDEOSIZE_CIF:
365 f->fmt.pix.width = 352;
366 f->fmt.pix.height = 288;
367 break;
368 case VIDEOSIZE_QVGA:
369 f->fmt.pix.width = 320;
370 f->fmt.pix.height = 240;
371 break;
372 case VIDEOSIZE_288_216:
373 f->fmt.pix.width = 288;
374 f->fmt.pix.height = 216;
375 break;
376 case VIDEOSIZE_256_192:
377 f->fmt.pix.width = 256;
378 f->fmt.pix.height = 192;
379 break;
380 case VIDEOSIZE_224_168:
381 f->fmt.pix.width = 224;
382 f->fmt.pix.height = 168;
383 break;
384 case VIDEOSIZE_192_144:
385 f->fmt.pix.width = 192;
386 f->fmt.pix.height = 144;
387 break;
388 case VIDEOSIZE_QCIF:
389 default:
390 f->fmt.pix.width = 176;
391 f->fmt.pix.height = 144;
392 break;
393 }
394
395 return 0;
396}
397
398
399
400
401
402
403
404
405
406static int cpia2_s_fmt_vid_cap(struct file *file, void *_fh,
407 struct v4l2_format *f)
408{
409 struct camera_data *cam = video_drvdata(file);
410 int err, frame;
411
412 err = cpia2_try_fmt_vid_cap(file, _fh, f);
413 if(err != 0)
414 return err;
415
416 cam->pixelformat = f->fmt.pix.pixelformat;
417
418
419
420 cam->params.compression.inhibit_htables = 0;
421
422
423
424
425
426 DBG("Requested width = %d, height = %d\n",
427 f->fmt.pix.width, f->fmt.pix.height);
428 if (f->fmt.pix.width != cam->width ||
429 f->fmt.pix.height != cam->height) {
430 cam->width = f->fmt.pix.width;
431 cam->height = f->fmt.pix.height;
432 cam->params.roi.width = f->fmt.pix.width;
433 cam->params.roi.height = f->fmt.pix.height;
434 cpia2_set_format(cam);
435 }
436
437 for (frame = 0; frame < cam->num_frames; ++frame) {
438 if (cam->buffers[frame].status == FRAME_READING)
439 if ((err = sync(cam, frame)) < 0)
440 return err;
441
442 cam->buffers[frame].status = FRAME_EMPTY;
443 }
444
445 return 0;
446}
447
448
449
450
451
452
453
454
455
456static int cpia2_g_fmt_vid_cap(struct file *file, void *fh,
457 struct v4l2_format *f)
458{
459 struct camera_data *cam = video_drvdata(file);
460
461 f->fmt.pix.width = cam->width;
462 f->fmt.pix.height = cam->height;
463 f->fmt.pix.pixelformat = cam->pixelformat;
464 f->fmt.pix.field = V4L2_FIELD_NONE;
465 f->fmt.pix.bytesperline = 0;
466 f->fmt.pix.sizeimage = cam->frame_size;
467 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
468 f->fmt.pix.priv = 0;
469
470 return 0;
471}
472
473
474
475
476
477
478
479
480
481
482static int cpia2_g_selection(struct file *file, void *fh,
483 struct v4l2_selection *s)
484{
485 struct camera_data *cam = video_drvdata(file);
486
487 if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
488 return -EINVAL;
489
490 switch (s->target) {
491 case V4L2_SEL_TGT_CROP_BOUNDS:
492 case V4L2_SEL_TGT_CROP_DEFAULT:
493 s->r.left = 0;
494 s->r.top = 0;
495 s->r.width = cam->width;
496 s->r.height = cam->height;
497 break;
498 default:
499 return -EINVAL;
500 }
501 return 0;
502}
503
504struct framerate_info {
505 int value;
506 struct v4l2_fract period;
507};
508
509static const struct framerate_info framerate_controls[] = {
510 { CPIA2_VP_FRAMERATE_6_25, { 4, 25 } },
511 { CPIA2_VP_FRAMERATE_7_5, { 2, 15 } },
512 { CPIA2_VP_FRAMERATE_12_5, { 2, 25 } },
513 { CPIA2_VP_FRAMERATE_15, { 1, 15 } },
514 { CPIA2_VP_FRAMERATE_25, { 1, 25 } },
515 { CPIA2_VP_FRAMERATE_30, { 1, 30 } },
516};
517
518static int cpia2_g_parm(struct file *file, void *fh, struct v4l2_streamparm *p)
519{
520 struct camera_data *cam = video_drvdata(file);
521 struct v4l2_captureparm *cap = &p->parm.capture;
522 int i;
523
524 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
525 return -EINVAL;
526
527 cap->capability = V4L2_CAP_TIMEPERFRAME;
528 cap->readbuffers = cam->num_frames;
529 for (i = 0; i < ARRAY_SIZE(framerate_controls); i++)
530 if (cam->params.vp_params.frame_rate == framerate_controls[i].value) {
531 cap->timeperframe = framerate_controls[i].period;
532 break;
533 }
534 return 0;
535}
536
537static int cpia2_s_parm(struct file *file, void *fh, struct v4l2_streamparm *p)
538{
539 struct camera_data *cam = video_drvdata(file);
540 struct v4l2_captureparm *cap = &p->parm.capture;
541 struct v4l2_fract tpf = cap->timeperframe;
542 int max = ARRAY_SIZE(framerate_controls) - 1;
543 int ret;
544 int i;
545
546 ret = cpia2_g_parm(file, fh, p);
547 if (ret || !tpf.denominator || !tpf.numerator)
548 return ret;
549
550
551 if (cam->params.pnp_id.device_type == DEVICE_STV_672 &&
552 cam->params.version.sensor_flags == CPIA2_VP_SENSOR_FLAGS_500)
553 max -= 2;
554 for (i = 0; i <= max; i++) {
555 struct v4l2_fract f1 = tpf;
556 struct v4l2_fract f2 = framerate_controls[i].period;
557
558 f1.numerator *= f2.denominator;
559 f2.numerator *= f1.denominator;
560 if (f1.numerator >= f2.numerator)
561 break;
562 }
563 if (i > max)
564 i = max;
565 cap->timeperframe = framerate_controls[i].period;
566 return cpia2_set_fps(cam, framerate_controls[i].value);
567}
568
569static const struct {
570 u32 width;
571 u32 height;
572} cpia2_framesizes[] = {
573 { 640, 480 },
574 { 352, 288 },
575 { 320, 240 },
576 { 288, 216 },
577 { 256, 192 },
578 { 224, 168 },
579 { 192, 144 },
580 { 176, 144 },
581};
582
583static int cpia2_enum_framesizes(struct file *file, void *fh,
584 struct v4l2_frmsizeenum *fsize)
585{
586
587 if (fsize->pixel_format != V4L2_PIX_FMT_MJPEG &&
588 fsize->pixel_format != V4L2_PIX_FMT_JPEG)
589 return -EINVAL;
590 if (fsize->index >= ARRAY_SIZE(cpia2_framesizes))
591 return -EINVAL;
592 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
593 fsize->discrete.width = cpia2_framesizes[fsize->index].width;
594 fsize->discrete.height = cpia2_framesizes[fsize->index].height;
595
596 return 0;
597}
598
599static int cpia2_enum_frameintervals(struct file *file, void *fh,
600 struct v4l2_frmivalenum *fival)
601{
602 struct camera_data *cam = video_drvdata(file);
603 int max = ARRAY_SIZE(framerate_controls) - 1;
604 int i;
605
606 if (fival->pixel_format != V4L2_PIX_FMT_MJPEG &&
607 fival->pixel_format != V4L2_PIX_FMT_JPEG)
608 return -EINVAL;
609
610
611 if (cam->params.pnp_id.device_type == DEVICE_STV_672 &&
612 cam->params.version.sensor_flags == CPIA2_VP_SENSOR_FLAGS_500)
613 max -= 2;
614 if (fival->index > max)
615 return -EINVAL;
616 for (i = 0; i < ARRAY_SIZE(cpia2_framesizes); i++)
617 if (fival->width == cpia2_framesizes[i].width &&
618 fival->height == cpia2_framesizes[i].height)
619 break;
620 if (i == ARRAY_SIZE(cpia2_framesizes))
621 return -EINVAL;
622 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
623 fival->discrete = framerate_controls[fival->index].period;
624 return 0;
625}
626
627
628
629
630
631
632
633
634
635static int cpia2_s_ctrl(struct v4l2_ctrl *ctrl)
636{
637 struct camera_data *cam =
638 container_of(ctrl->handler, struct camera_data, hdl);
639 static const int flicker_table[] = {
640 NEVER_FLICKER,
641 FLICKER_50,
642 FLICKER_60,
643 };
644
645 DBG("Set control id:%d, value:%d\n", ctrl->id, ctrl->val);
646
647 switch (ctrl->id) {
648 case V4L2_CID_BRIGHTNESS:
649 cpia2_set_brightness(cam, ctrl->val);
650 break;
651 case V4L2_CID_CONTRAST:
652 cpia2_set_contrast(cam, ctrl->val);
653 break;
654 case V4L2_CID_SATURATION:
655 cpia2_set_saturation(cam, ctrl->val);
656 break;
657 case V4L2_CID_HFLIP:
658 cpia2_set_property_mirror(cam, ctrl->val);
659 break;
660 case V4L2_CID_VFLIP:
661 cpia2_set_property_flip(cam, ctrl->val);
662 break;
663 case V4L2_CID_POWER_LINE_FREQUENCY:
664 return cpia2_set_flicker_mode(cam, flicker_table[ctrl->val]);
665 case V4L2_CID_ILLUMINATORS_1:
666 return cpia2_set_gpio(cam, (cam->top_light->val << 6) |
667 (cam->bottom_light->val << 7));
668 case V4L2_CID_JPEG_ACTIVE_MARKER:
669 cam->params.compression.inhibit_htables =
670 !(ctrl->val & V4L2_JPEG_ACTIVE_MARKER_DHT);
671 break;
672 case V4L2_CID_JPEG_COMPRESSION_QUALITY:
673 cam->params.vc_params.quality = ctrl->val;
674 break;
675 case CPIA2_CID_USB_ALT:
676 cam->params.camera_state.stream_mode = ctrl->val;
677 break;
678 default:
679 return -EINVAL;
680 }
681
682 return 0;
683}
684
685
686
687
688
689
690
691
692
693static int cpia2_g_jpegcomp(struct file *file, void *fh, struct v4l2_jpegcompression *parms)
694{
695 struct camera_data *cam = video_drvdata(file);
696
697 memset(parms, 0, sizeof(*parms));
698
699 parms->quality = 80;
700
701 parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI;
702 if(!cam->params.compression.inhibit_htables) {
703 parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT;
704 }
705
706 parms->APPn = cam->APPn;
707 parms->APP_len = cam->APP_len;
708 if(cam->APP_len > 0) {
709 memcpy(parms->APP_data, cam->APP_data, cam->APP_len);
710 parms->jpeg_markers |= V4L2_JPEG_MARKER_APP;
711 }
712
713 parms->COM_len = cam->COM_len;
714 if(cam->COM_len > 0) {
715 memcpy(parms->COM_data, cam->COM_data, cam->COM_len);
716 parms->jpeg_markers |= JPEG_MARKER_COM;
717 }
718
719 DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n",
720 parms->APP_len, parms->COM_len);
721
722 return 0;
723}
724
725
726
727
728
729
730
731
732
733
734static int cpia2_s_jpegcomp(struct file *file, void *fh,
735 const struct v4l2_jpegcompression *parms)
736{
737 struct camera_data *cam = video_drvdata(file);
738
739 DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n",
740 parms->APP_len, parms->COM_len);
741
742 cam->params.compression.inhibit_htables =
743 !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
744
745 if(parms->APP_len != 0) {
746 if(parms->APP_len > 0 &&
747 parms->APP_len <= sizeof(cam->APP_data) &&
748 parms->APPn >= 0 && parms->APPn <= 15) {
749 cam->APPn = parms->APPn;
750 cam->APP_len = parms->APP_len;
751 memcpy(cam->APP_data, parms->APP_data, parms->APP_len);
752 } else {
753 LOG("Bad APPn Params n=%d len=%d\n",
754 parms->APPn, parms->APP_len);
755 return -EINVAL;
756 }
757 } else {
758 cam->APP_len = 0;
759 }
760
761 if(parms->COM_len != 0) {
762 if(parms->COM_len > 0 &&
763 parms->COM_len <= sizeof(cam->COM_data)) {
764 cam->COM_len = parms->COM_len;
765 memcpy(cam->COM_data, parms->COM_data, parms->COM_len);
766 } else {
767 LOG("Bad COM_len=%d\n", parms->COM_len);
768 return -EINVAL;
769 }
770 }
771
772 return 0;
773}
774
775
776
777
778
779
780
781
782
783
784static int cpia2_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *req)
785{
786 struct camera_data *cam = video_drvdata(file);
787
788 if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
789 req->memory != V4L2_MEMORY_MMAP)
790 return -EINVAL;
791
792 DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames);
793 req->count = cam->num_frames;
794 memset(&req->reserved, 0, sizeof(req->reserved));
795
796 return 0;
797}
798
799
800
801
802
803
804
805
806
807static int cpia2_querybuf(struct file *file, void *fh, struct v4l2_buffer *buf)
808{
809 struct camera_data *cam = video_drvdata(file);
810
811 if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
812 buf->index >= cam->num_frames)
813 return -EINVAL;
814
815 buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
816 buf->length = cam->frame_size;
817
818 buf->memory = V4L2_MEMORY_MMAP;
819
820 if(cam->mmapped)
821 buf->flags = V4L2_BUF_FLAG_MAPPED;
822 else
823 buf->flags = 0;
824
825 buf->flags |= V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
826
827 switch (cam->buffers[buf->index].status) {
828 case FRAME_EMPTY:
829 case FRAME_ERROR:
830 case FRAME_READING:
831 buf->bytesused = 0;
832 buf->flags = V4L2_BUF_FLAG_QUEUED;
833 break;
834 case FRAME_READY:
835 buf->bytesused = cam->buffers[buf->index].length;
836 buf->timestamp = cam->buffers[buf->index].timestamp;
837 buf->sequence = cam->buffers[buf->index].seq;
838 buf->flags = V4L2_BUF_FLAG_DONE;
839 break;
840 }
841
842 DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n",
843 buf->index, buf->m.offset, buf->flags, buf->sequence,
844 buf->bytesused);
845
846 return 0;
847}
848
849
850
851
852
853
854
855
856
857static int cpia2_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
858{
859 struct camera_data *cam = video_drvdata(file);
860
861 if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
862 buf->memory != V4L2_MEMORY_MMAP ||
863 buf->index >= cam->num_frames)
864 return -EINVAL;
865
866 DBG("QBUF #%d\n", buf->index);
867
868 if(cam->buffers[buf->index].status == FRAME_READY)
869 cam->buffers[buf->index].status = FRAME_EMPTY;
870
871 return 0;
872}
873
874
875
876
877
878
879
880
881
882static int find_earliest_filled_buffer(struct camera_data *cam)
883{
884 int i;
885 int found = -1;
886 for (i=0; i<cam->num_frames; i++) {
887 if(cam->buffers[i].status == FRAME_READY) {
888 if(found < 0) {
889 found = i;
890 } else {
891
892 struct timeval *tv1, *tv2;
893 tv1 = &cam->buffers[i].timestamp;
894 tv2 = &cam->buffers[found].timestamp;
895 if(tv1->tv_sec < tv2->tv_sec ||
896 (tv1->tv_sec == tv2->tv_sec &&
897 tv1->tv_usec < tv2->tv_usec))
898 found = i;
899 }
900 }
901 }
902 return found;
903}
904
905
906
907
908
909
910
911
912
913static int cpia2_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
914{
915 struct camera_data *cam = video_drvdata(file);
916 int frame;
917
918 if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
919 buf->memory != V4L2_MEMORY_MMAP)
920 return -EINVAL;
921
922 frame = find_earliest_filled_buffer(cam);
923
924 if(frame < 0 && file->f_flags&O_NONBLOCK)
925 return -EAGAIN;
926
927 if(frame < 0) {
928
929 struct framebuf *cb=cam->curbuff;
930 mutex_unlock(&cam->v4l2_lock);
931 wait_event_interruptible(cam->wq_stream,
932 !video_is_registered(&cam->vdev) ||
933 (cb=cam->curbuff)->status == FRAME_READY);
934 mutex_lock(&cam->v4l2_lock);
935 if (signal_pending(current))
936 return -ERESTARTSYS;
937 if (!video_is_registered(&cam->vdev))
938 return -ENOTTY;
939 frame = cb->num;
940 }
941
942
943 buf->index = frame;
944 buf->bytesused = cam->buffers[buf->index].length;
945 buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE
946 | V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
947 buf->field = V4L2_FIELD_NONE;
948 buf->timestamp = cam->buffers[buf->index].timestamp;
949 buf->sequence = cam->buffers[buf->index].seq;
950 buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
951 buf->length = cam->frame_size;
952 buf->reserved2 = 0;
953 buf->request_fd = 0;
954 memset(&buf->timecode, 0, sizeof(buf->timecode));
955
956 DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index,
957 cam->buffers[buf->index].status, buf->sequence, buf->bytesused);
958
959 return 0;
960}
961
962static int cpia2_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
963{
964 struct camera_data *cam = video_drvdata(file);
965 int ret = -EINVAL;
966
967 DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming);
968 if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
969 return -EINVAL;
970
971 if (!cam->streaming) {
972 ret = cpia2_usb_stream_start(cam,
973 cam->params.camera_state.stream_mode);
974 if (!ret)
975 v4l2_ctrl_grab(cam->usb_alt, true);
976 }
977 return ret;
978}
979
980static int cpia2_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
981{
982 struct camera_data *cam = video_drvdata(file);
983 int ret = -EINVAL;
984
985 DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming);
986 if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
987 return -EINVAL;
988
989 if (cam->streaming) {
990 ret = cpia2_usb_stream_stop(cam);
991 if (!ret)
992 v4l2_ctrl_grab(cam->usb_alt, false);
993 }
994 return ret;
995}
996
997
998
999
1000
1001
1002static int cpia2_mmap(struct file *file, struct vm_area_struct *area)
1003{
1004 struct camera_data *cam = video_drvdata(file);
1005 int retval;
1006
1007 if (mutex_lock_interruptible(&cam->v4l2_lock))
1008 return -ERESTARTSYS;
1009 retval = cpia2_remap_buffer(cam, area);
1010
1011 if(!retval)
1012 cam->stream_fh = file->private_data;
1013 mutex_unlock(&cam->v4l2_lock);
1014 return retval;
1015}
1016
1017
1018
1019
1020
1021
1022
1023static void reset_camera_struct_v4l(struct camera_data *cam)
1024{
1025 cam->width = cam->params.roi.width;
1026 cam->height = cam->params.roi.height;
1027
1028 cam->frame_size = buffer_size;
1029 cam->num_frames = num_buffers;
1030
1031
1032 cam->params.flicker_control.flicker_mode_req = flicker_mode;
1033
1034
1035 cam->params.camera_state.stream_mode = alternate;
1036
1037 cam->pixelformat = V4L2_PIX_FMT_JPEG;
1038}
1039
1040static const struct v4l2_ioctl_ops cpia2_ioctl_ops = {
1041 .vidioc_querycap = cpia2_querycap,
1042 .vidioc_enum_input = cpia2_enum_input,
1043 .vidioc_g_input = cpia2_g_input,
1044 .vidioc_s_input = cpia2_s_input,
1045 .vidioc_enum_fmt_vid_cap = cpia2_enum_fmt_vid_cap,
1046 .vidioc_g_fmt_vid_cap = cpia2_g_fmt_vid_cap,
1047 .vidioc_s_fmt_vid_cap = cpia2_s_fmt_vid_cap,
1048 .vidioc_try_fmt_vid_cap = cpia2_try_fmt_vid_cap,
1049 .vidioc_g_jpegcomp = cpia2_g_jpegcomp,
1050 .vidioc_s_jpegcomp = cpia2_s_jpegcomp,
1051 .vidioc_g_selection = cpia2_g_selection,
1052 .vidioc_reqbufs = cpia2_reqbufs,
1053 .vidioc_querybuf = cpia2_querybuf,
1054 .vidioc_qbuf = cpia2_qbuf,
1055 .vidioc_dqbuf = cpia2_dqbuf,
1056 .vidioc_streamon = cpia2_streamon,
1057 .vidioc_streamoff = cpia2_streamoff,
1058 .vidioc_s_parm = cpia2_s_parm,
1059 .vidioc_g_parm = cpia2_g_parm,
1060 .vidioc_enum_framesizes = cpia2_enum_framesizes,
1061 .vidioc_enum_frameintervals = cpia2_enum_frameintervals,
1062 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1063 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1064};
1065
1066
1067
1068
1069static const struct v4l2_file_operations cpia2_fops = {
1070 .owner = THIS_MODULE,
1071 .open = cpia2_open,
1072 .release = cpia2_close,
1073 .read = cpia2_v4l_read,
1074 .poll = cpia2_v4l_poll,
1075 .unlocked_ioctl = video_ioctl2,
1076 .mmap = cpia2_mmap,
1077};
1078
1079static const struct video_device cpia2_template = {
1080
1081 .name = "CPiA2 Camera",
1082 .fops = &cpia2_fops,
1083 .ioctl_ops = &cpia2_ioctl_ops,
1084 .release = video_device_release_empty,
1085};
1086
1087void cpia2_camera_release(struct v4l2_device *v4l2_dev)
1088{
1089 struct camera_data *cam =
1090 container_of(v4l2_dev, struct camera_data, v4l2_dev);
1091
1092 v4l2_ctrl_handler_free(&cam->hdl);
1093 v4l2_device_unregister(&cam->v4l2_dev);
1094 kfree(cam);
1095}
1096
1097static const struct v4l2_ctrl_ops cpia2_ctrl_ops = {
1098 .s_ctrl = cpia2_s_ctrl,
1099};
1100
1101
1102
1103
1104
1105
1106int cpia2_register_camera(struct camera_data *cam)
1107{
1108 struct v4l2_ctrl_handler *hdl = &cam->hdl;
1109 struct v4l2_ctrl_config cpia2_usb_alt = {
1110 .ops = &cpia2_ctrl_ops,
1111 .id = CPIA2_CID_USB_ALT,
1112 .name = "USB Alternate",
1113 .type = V4L2_CTRL_TYPE_INTEGER,
1114 .min = USBIF_ISO_1,
1115 .max = USBIF_ISO_6,
1116 .step = 1,
1117 };
1118 int ret;
1119
1120 v4l2_ctrl_handler_init(hdl, 12);
1121 v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1122 V4L2_CID_BRIGHTNESS,
1123 cam->params.pnp_id.device_type == DEVICE_STV_672 ? 1 : 0,
1124 255, 1, DEFAULT_BRIGHTNESS);
1125 v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1126 V4L2_CID_CONTRAST, 0, 255, 1, DEFAULT_CONTRAST);
1127 v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1128 V4L2_CID_SATURATION, 0, 255, 1, DEFAULT_SATURATION);
1129 v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1130 V4L2_CID_HFLIP, 0, 1, 1, 0);
1131 v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1132 V4L2_CID_JPEG_ACTIVE_MARKER, 0,
1133 V4L2_JPEG_ACTIVE_MARKER_DHT, 0,
1134 V4L2_JPEG_ACTIVE_MARKER_DHT);
1135 v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1136 V4L2_CID_JPEG_COMPRESSION_QUALITY, 1,
1137 100, 1, 100);
1138 cpia2_usb_alt.def = alternate;
1139 cam->usb_alt = v4l2_ctrl_new_custom(hdl, &cpia2_usb_alt, NULL);
1140
1141 if (cam->params.pnp_id.device_type != DEVICE_STV_672)
1142 v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1143 V4L2_CID_VFLIP, 0, 1, 1, 0);
1144
1145 if (cam->params.pnp_id.device_type == DEVICE_STV_672)
1146 v4l2_ctrl_new_std_menu(hdl, &cpia2_ctrl_ops,
1147 V4L2_CID_POWER_LINE_FREQUENCY,
1148 V4L2_CID_POWER_LINE_FREQUENCY_60HZ, 0, 0);
1149
1150 if (cam->params.pnp_id.product == 0x151) {
1151 cam->top_light = v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1152 V4L2_CID_ILLUMINATORS_1, 0, 1, 1, 0);
1153 cam->bottom_light = v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
1154 V4L2_CID_ILLUMINATORS_2, 0, 1, 1, 0);
1155 v4l2_ctrl_cluster(2, &cam->top_light);
1156 }
1157
1158 if (hdl->error) {
1159 ret = hdl->error;
1160 v4l2_ctrl_handler_free(hdl);
1161 return ret;
1162 }
1163
1164 cam->vdev = cpia2_template;
1165 video_set_drvdata(&cam->vdev, cam);
1166 cam->vdev.lock = &cam->v4l2_lock;
1167 cam->vdev.ctrl_handler = hdl;
1168 cam->vdev.v4l2_dev = &cam->v4l2_dev;
1169
1170 reset_camera_struct_v4l(cam);
1171
1172
1173 if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
1174 ERR("video_register_device failed\n");
1175 return -ENODEV;
1176 }
1177
1178 return 0;
1179}
1180
1181
1182
1183
1184
1185
1186void cpia2_unregister_camera(struct camera_data *cam)
1187{
1188 video_unregister_device(&cam->vdev);
1189}
1190
1191
1192
1193
1194
1195
1196
1197static void __init check_parameters(void)
1198{
1199 if(buffer_size < PAGE_SIZE) {
1200 buffer_size = PAGE_SIZE;
1201 LOG("buffer_size too small, setting to %d\n", buffer_size);
1202 } else if(buffer_size > 1024*1024) {
1203
1204 buffer_size = 1024*1024;
1205 LOG("buffer_size ridiculously large, setting to %d\n",
1206 buffer_size);
1207 } else {
1208 buffer_size += PAGE_SIZE-1;
1209 buffer_size &= ~(PAGE_SIZE-1);
1210 }
1211
1212 if(num_buffers < 1) {
1213 num_buffers = 1;
1214 LOG("num_buffers too small, setting to %d\n", num_buffers);
1215 } else if(num_buffers > VIDEO_MAX_FRAME) {
1216 num_buffers = VIDEO_MAX_FRAME;
1217 LOG("num_buffers too large, setting to %d\n", num_buffers);
1218 }
1219
1220 if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) {
1221 alternate = DEFAULT_ALT;
1222 LOG("alternate specified is invalid, using %d\n", alternate);
1223 }
1224
1225 if (flicker_mode != 0 && flicker_mode != FLICKER_50 && flicker_mode != FLICKER_60) {
1226 flicker_mode = 0;
1227 LOG("Flicker mode specified is invalid, using %d\n",
1228 flicker_mode);
1229 }
1230
1231 DBG("Using %d buffers, each %d bytes, alternate=%d\n",
1232 num_buffers, buffer_size, alternate);
1233}
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243static int __init cpia2_init(void)
1244{
1245 LOG("%s v%s\n",
1246 ABOUT, CPIA_VERSION);
1247 check_parameters();
1248 cpia2_usb_init();
1249 return 0;
1250}
1251
1252
1253
1254
1255
1256
1257
1258static void __exit cpia2_exit(void)
1259{
1260 cpia2_usb_cleanup();
1261 schedule_timeout(2 * HZ);
1262}
1263
1264module_init(cpia2_init);
1265module_exit(cpia2_exit);
1266
