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