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[media] v4l2: make vidioc_s_jpegcomp const
[deliverable/linux.git] / drivers / media / usb / cpia2 / cpia2_v4l.c
1 /****************************************************************************
2 *
3 * Filename: cpia2_v4l.c
4 *
5 * Copyright 2001, STMicrolectronics, Inc.
6 * Contact: steve.miller@st.com
7 * Copyright 2001,2005, Scott J. Bertin <scottbertin@yahoo.com>
8 *
9 * Description:
10 * This is a USB driver for CPia2 based video cameras.
11 * The infrastructure of this driver is based on the cpia usb driver by
12 * Jochen Scharrlach and Johannes Erdfeldt.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 *
28 * Stripped of 2.4 stuff ready for main kernel submit by
29 * Alan Cox <alan@lxorguk.ukuu.org.uk>
30 ****************************************************************************/
31
32 #define CPIA_VERSION "3.0.1"
33
34 #include <linux/module.h>
35 #include <linux/time.h>
36 #include <linux/sched.h>
37 #include <linux/slab.h>
38 #include <linux/init.h>
39 #include <linux/videodev2.h>
40 #include <linux/stringify.h>
41 #include <media/v4l2-ioctl.h>
42 #include <media/v4l2-event.h>
43
44 #include "cpia2.h"
45
46 static int video_nr = -1;
47 module_param(video_nr, int, 0);
48 MODULE_PARM_DESC(video_nr, "video device to register (0=/dev/video0, etc)");
49
50 static int buffer_size = 68 * 1024;
51 module_param(buffer_size, int, 0);
52 MODULE_PARM_DESC(buffer_size, "Size for each frame buffer in bytes (default 68k)");
53
54 static int num_buffers = 3;
55 module_param(num_buffers, int, 0);
56 MODULE_PARM_DESC(num_buffers, "Number of frame buffers (1-"
57 __stringify(VIDEO_MAX_FRAME) ", default 3)");
58
59 static int alternate = DEFAULT_ALT;
60 module_param(alternate, int, 0);
61 MODULE_PARM_DESC(alternate, "USB Alternate (" __stringify(USBIF_ISO_1) "-"
62 __stringify(USBIF_ISO_6) ", default "
63 __stringify(DEFAULT_ALT) ")");
64
65 static int flicker_mode;
66 module_param(flicker_mode, int, 0);
67 MODULE_PARM_DESC(flicker_mode, "Flicker frequency (0 (disabled), " __stringify(50) " or "
68 __stringify(60) ", default 0)");
69
70 MODULE_AUTHOR("Steve Miller (STMicroelectronics) <steve.miller@st.com>");
71 MODULE_DESCRIPTION("V4L-driver for STMicroelectronics CPiA2 based cameras");
72 MODULE_SUPPORTED_DEVICE("video");
73 MODULE_LICENSE("GPL");
74 MODULE_VERSION(CPIA_VERSION);
75
76 #define ABOUT "V4L-Driver for Vision CPiA2 based cameras"
77 #define CPIA2_CID_USB_ALT (V4L2_CID_USER_BASE | 0xf000)
78
79 /******************************************************************************
80 *
81 * cpia2_open
82 *
83 *****************************************************************************/
84 static int cpia2_open(struct file *file)
85 {
86 struct camera_data *cam = video_drvdata(file);
87 int retval;
88
89 if (mutex_lock_interruptible(&cam->v4l2_lock))
90 return -ERESTARTSYS;
91 retval = v4l2_fh_open(file);
92 if (retval)
93 goto open_unlock;
94
95 if (v4l2_fh_is_singular_file(file)) {
96 if (cpia2_allocate_buffers(cam)) {
97 v4l2_fh_release(file);
98 retval = -ENOMEM;
99 goto open_unlock;
100 }
101
102 /* reset the camera */
103 if (cpia2_reset_camera(cam) < 0) {
104 v4l2_fh_release(file);
105 retval = -EIO;
106 goto open_unlock;
107 }
108
109 cam->APP_len = 0;
110 cam->COM_len = 0;
111 }
112
113 cpia2_dbg_dump_registers(cam);
114 open_unlock:
115 mutex_unlock(&cam->v4l2_lock);
116 return retval;
117 }
118
119 /******************************************************************************
120 *
121 * cpia2_close
122 *
123 *****************************************************************************/
124 static int cpia2_close(struct file *file)
125 {
126 struct video_device *dev = video_devdata(file);
127 struct camera_data *cam = video_get_drvdata(dev);
128
129 mutex_lock(&cam->v4l2_lock);
130 if (video_is_registered(&cam->vdev) && v4l2_fh_is_singular_file(file)) {
131 cpia2_usb_stream_stop(cam);
132
133 /* save camera state for later open */
134 cpia2_save_camera_state(cam);
135
136 cpia2_set_low_power(cam);
137 cpia2_free_buffers(cam);
138 }
139
140 if (cam->stream_fh == file->private_data) {
141 cam->stream_fh = NULL;
142 cam->mmapped = 0;
143 }
144 mutex_unlock(&cam->v4l2_lock);
145 return v4l2_fh_release(file);
146 }
147
148 /******************************************************************************
149 *
150 * cpia2_v4l_read
151 *
152 *****************************************************************************/
153 static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count,
154 loff_t *off)
155 {
156 struct camera_data *cam = video_drvdata(file);
157 int noblock = file->f_flags&O_NONBLOCK;
158 ssize_t ret;
159
160 if(!cam)
161 return -EINVAL;
162
163 if (mutex_lock_interruptible(&cam->v4l2_lock))
164 return -ERESTARTSYS;
165 ret = cpia2_read(cam, buf, count, noblock);
166 mutex_unlock(&cam->v4l2_lock);
167 return ret;
168 }
169
170
171 /******************************************************************************
172 *
173 * cpia2_v4l_poll
174 *
175 *****************************************************************************/
176 static unsigned int cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait)
177 {
178 struct camera_data *cam = video_drvdata(filp);
179 unsigned int res;
180
181 mutex_lock(&cam->v4l2_lock);
182 res = cpia2_poll(cam, filp, wait);
183 mutex_unlock(&cam->v4l2_lock);
184 return res;
185 }
186
187
188 static int sync(struct camera_data *cam, int frame_nr)
189 {
190 struct framebuf *frame = &cam->buffers[frame_nr];
191
192 while (1) {
193 if (frame->status == FRAME_READY)
194 return 0;
195
196 if (!cam->streaming) {
197 frame->status = FRAME_READY;
198 frame->length = 0;
199 return 0;
200 }
201
202 mutex_unlock(&cam->v4l2_lock);
203 wait_event_interruptible(cam->wq_stream,
204 !cam->streaming ||
205 frame->status == FRAME_READY);
206 mutex_lock(&cam->v4l2_lock);
207 if (signal_pending(current))
208 return -ERESTARTSYS;
209 if (!video_is_registered(&cam->vdev))
210 return -ENOTTY;
211 }
212 }
213
214 /******************************************************************************
215 *
216 * ioctl_querycap
217 *
218 * V4L2 device capabilities
219 *
220 *****************************************************************************/
221
222 static int cpia2_querycap(struct file *file, void *fh, struct v4l2_capability *vc)
223 {
224 struct camera_data *cam = video_drvdata(file);
225
226 strcpy(vc->driver, "cpia2");
227
228 if (cam->params.pnp_id.product == 0x151)
229 strcpy(vc->card, "QX5 Microscope");
230 else
231 strcpy(vc->card, "CPiA2 Camera");
232 switch (cam->params.pnp_id.device_type) {
233 case DEVICE_STV_672:
234 strcat(vc->card, " (672/");
235 break;
236 case DEVICE_STV_676:
237 strcat(vc->card, " (676/");
238 break;
239 default:
240 strcat(vc->card, " (XXX/");
241 break;
242 }
243 switch (cam->params.version.sensor_flags) {
244 case CPIA2_VP_SENSOR_FLAGS_404:
245 strcat(vc->card, "404)");
246 break;
247 case CPIA2_VP_SENSOR_FLAGS_407:
248 strcat(vc->card, "407)");
249 break;
250 case CPIA2_VP_SENSOR_FLAGS_409:
251 strcat(vc->card, "409)");
252 break;
253 case CPIA2_VP_SENSOR_FLAGS_410:
254 strcat(vc->card, "410)");
255 break;
256 case CPIA2_VP_SENSOR_FLAGS_500:
257 strcat(vc->card, "500)");
258 break;
259 default:
260 strcat(vc->card, "XXX)");
261 break;
262 }
263
264 if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0)
265 memset(vc->bus_info,0, sizeof(vc->bus_info));
266
267 vc->device_caps = V4L2_CAP_VIDEO_CAPTURE |
268 V4L2_CAP_READWRITE |
269 V4L2_CAP_STREAMING;
270 vc->capabilities = vc->device_caps |
271 V4L2_CAP_DEVICE_CAPS;
272
273 return 0;
274 }
275
276 /******************************************************************************
277 *
278 * ioctl_input
279 *
280 * V4L2 input get/set/enumerate
281 *
282 *****************************************************************************/
283
284 static int cpia2_enum_input(struct file *file, void *fh, struct v4l2_input *i)
285 {
286 if (i->index)
287 return -EINVAL;
288 strcpy(i->name, "Camera");
289 i->type = V4L2_INPUT_TYPE_CAMERA;
290 return 0;
291 }
292
293 static int cpia2_g_input(struct file *file, void *fh, unsigned int *i)
294 {
295 *i = 0;
296 return 0;
297 }
298
299 static int cpia2_s_input(struct file *file, void *fh, unsigned int i)
300 {
301 return i ? -EINVAL : 0;
302 }
303
304 /******************************************************************************
305 *
306 * ioctl_enum_fmt
307 *
308 * V4L2 format enumerate
309 *
310 *****************************************************************************/
311
312 static int cpia2_enum_fmt_vid_cap(struct file *file, void *fh,
313 struct v4l2_fmtdesc *f)
314 {
315 int index = f->index;
316
317 if (index < 0 || index > 1)
318 return -EINVAL;
319
320 memset(f, 0, sizeof(*f));
321 f->index = index;
322 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
323 f->flags = V4L2_FMT_FLAG_COMPRESSED;
324 switch(index) {
325 case 0:
326 strcpy(f->description, "MJPEG");
327 f->pixelformat = V4L2_PIX_FMT_MJPEG;
328 break;
329 case 1:
330 strcpy(f->description, "JPEG");
331 f->pixelformat = V4L2_PIX_FMT_JPEG;
332 break;
333 default:
334 return -EINVAL;
335 }
336
337 return 0;
338 }
339
340 /******************************************************************************
341 *
342 * ioctl_try_fmt
343 *
344 * V4L2 format try
345 *
346 *****************************************************************************/
347
348 static int cpia2_try_fmt_vid_cap(struct file *file, void *fh,
349 struct v4l2_format *f)
350 {
351 struct camera_data *cam = video_drvdata(file);
352
353 if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG &&
354 f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
355 return -EINVAL;
356
357 f->fmt.pix.field = V4L2_FIELD_NONE;
358 f->fmt.pix.bytesperline = 0;
359 f->fmt.pix.sizeimage = cam->frame_size;
360 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
361 f->fmt.pix.priv = 0;
362
363 switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
364 case VIDEOSIZE_VGA:
365 f->fmt.pix.width = 640;
366 f->fmt.pix.height = 480;
367 break;
368 case VIDEOSIZE_CIF:
369 f->fmt.pix.width = 352;
370 f->fmt.pix.height = 288;
371 break;
372 case VIDEOSIZE_QVGA:
373 f->fmt.pix.width = 320;
374 f->fmt.pix.height = 240;
375 break;
376 case VIDEOSIZE_288_216:
377 f->fmt.pix.width = 288;
378 f->fmt.pix.height = 216;
379 break;
380 case VIDEOSIZE_256_192:
381 f->fmt.pix.width = 256;
382 f->fmt.pix.height = 192;
383 break;
384 case VIDEOSIZE_224_168:
385 f->fmt.pix.width = 224;
386 f->fmt.pix.height = 168;
387 break;
388 case VIDEOSIZE_192_144:
389 f->fmt.pix.width = 192;
390 f->fmt.pix.height = 144;
391 break;
392 case VIDEOSIZE_QCIF:
393 default:
394 f->fmt.pix.width = 176;
395 f->fmt.pix.height = 144;
396 break;
397 }
398
399 return 0;
400 }
401
402 /******************************************************************************
403 *
404 * ioctl_set_fmt
405 *
406 * V4L2 format set
407 *
408 *****************************************************************************/
409
410 static int cpia2_s_fmt_vid_cap(struct file *file, void *_fh,
411 struct v4l2_format *f)
412 {
413 struct camera_data *cam = video_drvdata(file);
414 int err, frame;
415
416 err = cpia2_try_fmt_vid_cap(file, _fh, f);
417 if(err != 0)
418 return err;
419
420 cam->pixelformat = f->fmt.pix.pixelformat;
421
422 /* NOTE: This should be set to 1 for MJPEG, but some apps don't handle
423 * the missing Huffman table properly. */
424 cam->params.compression.inhibit_htables = 0;
425 /*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/
426
427 /* we set the video window to something smaller or equal to what
428 * is requested by the user???
429 */
430 DBG("Requested width = %d, height = %d\n",
431 f->fmt.pix.width, f->fmt.pix.height);
432 if (f->fmt.pix.width != cam->width ||
433 f->fmt.pix.height != cam->height) {
434 cam->width = f->fmt.pix.width;
435 cam->height = f->fmt.pix.height;
436 cam->params.roi.width = f->fmt.pix.width;
437 cam->params.roi.height = f->fmt.pix.height;
438 cpia2_set_format(cam);
439 }
440
441 for (frame = 0; frame < cam->num_frames; ++frame) {
442 if (cam->buffers[frame].status == FRAME_READING)
443 if ((err = sync(cam, frame)) < 0)
444 return err;
445
446 cam->buffers[frame].status = FRAME_EMPTY;
447 }
448
449 return 0;
450 }
451
452 /******************************************************************************
453 *
454 * ioctl_get_fmt
455 *
456 * V4L2 format get
457 *
458 *****************************************************************************/
459
460 static int cpia2_g_fmt_vid_cap(struct file *file, void *fh,
461 struct v4l2_format *f)
462 {
463 struct camera_data *cam = video_drvdata(file);
464
465 f->fmt.pix.width = cam->width;
466 f->fmt.pix.height = cam->height;
467 f->fmt.pix.pixelformat = cam->pixelformat;
468 f->fmt.pix.field = V4L2_FIELD_NONE;
469 f->fmt.pix.bytesperline = 0;
470 f->fmt.pix.sizeimage = cam->frame_size;
471 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
472 f->fmt.pix.priv = 0;
473
474 return 0;
475 }
476
477 /******************************************************************************
478 *
479 * ioctl_cropcap
480 *
481 * V4L2 query cropping capabilities
482 * NOTE: cropping is currently disabled
483 *
484 *****************************************************************************/
485
486 static int cpia2_cropcap(struct file *file, void *fh, struct v4l2_cropcap *c)
487 {
488 struct camera_data *cam = video_drvdata(file);
489
490 if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
491 return -EINVAL;
492
493 c->bounds.left = 0;
494 c->bounds.top = 0;
495 c->bounds.width = cam->width;
496 c->bounds.height = cam->height;
497 c->defrect.left = 0;
498 c->defrect.top = 0;
499 c->defrect.width = cam->width;
500 c->defrect.height = cam->height;
501 c->pixelaspect.numerator = 1;
502 c->pixelaspect.denominator = 1;
503
504 return 0;
505 }
506
507 struct framerate_info {
508 int value;
509 struct v4l2_fract period;
510 };
511
512 static const struct framerate_info framerate_controls[] = {
513 { CPIA2_VP_FRAMERATE_6_25, { 4, 25 } },
514 { CPIA2_VP_FRAMERATE_7_5, { 2, 15 } },
515 { CPIA2_VP_FRAMERATE_12_5, { 2, 25 } },
516 { CPIA2_VP_FRAMERATE_15, { 1, 15 } },
517 { CPIA2_VP_FRAMERATE_25, { 1, 25 } },
518 { CPIA2_VP_FRAMERATE_30, { 1, 30 } },
519 };
520
521 static int cpia2_g_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 int i;
526
527 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
528 return -EINVAL;
529
530 cap->capability = V4L2_CAP_TIMEPERFRAME;
531 cap->readbuffers = cam->num_frames;
532 for (i = 0; i < ARRAY_SIZE(framerate_controls); i++)
533 if (cam->params.vp_params.frame_rate == framerate_controls[i].value) {
534 cap->timeperframe = framerate_controls[i].period;
535 break;
536 }
537 return 0;
538 }
539
540 static int cpia2_s_parm(struct file *file, void *fh, struct v4l2_streamparm *p)
541 {
542 struct camera_data *cam = video_drvdata(file);
543 struct v4l2_captureparm *cap = &p->parm.capture;
544 struct v4l2_fract tpf = cap->timeperframe;
545 int max = ARRAY_SIZE(framerate_controls) - 1;
546 int ret;
547 int i;
548
549 ret = cpia2_g_parm(file, fh, p);
550 if (ret || !tpf.denominator || !tpf.numerator)
551 return ret;
552
553 /* Maximum 15 fps for this model */
554 if (cam->params.pnp_id.device_type == DEVICE_STV_672 &&
555 cam->params.version.sensor_flags == CPIA2_VP_SENSOR_FLAGS_500)
556 max -= 2;
557 for (i = 0; i <= max; i++) {
558 struct v4l2_fract f1 = tpf;
559 struct v4l2_fract f2 = framerate_controls[i].period;
560
561 f1.numerator *= f2.denominator;
562 f2.numerator *= f1.denominator;
563 if (f1.numerator >= f2.numerator)
564 break;
565 }
566 if (i > max)
567 i = max;
568 cap->timeperframe = framerate_controls[i].period;
569 return cpia2_set_fps(cam, framerate_controls[i].value);
570 }
571
572 static const struct {
573 u32 width;
574 u32 height;
575 } cpia2_framesizes[] = {
576 { 640, 480 },
577 { 352, 288 },
578 { 320, 240 },
579 { 288, 216 },
580 { 256, 192 },
581 { 224, 168 },
582 { 192, 144 },
583 { 176, 144 },
584 };
585
586 static int cpia2_enum_framesizes(struct file *file, void *fh,
587 struct v4l2_frmsizeenum *fsize)
588 {
589
590 if (fsize->pixel_format != V4L2_PIX_FMT_MJPEG &&
591 fsize->pixel_format != V4L2_PIX_FMT_JPEG)
592 return -EINVAL;
593 if (fsize->index >= ARRAY_SIZE(cpia2_framesizes))
594 return -EINVAL;
595 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
596 fsize->discrete.width = cpia2_framesizes[fsize->index].width;
597 fsize->discrete.height = cpia2_framesizes[fsize->index].height;
598
599 return 0;
600 }
601
602 static int cpia2_enum_frameintervals(struct file *file, void *fh,
603 struct v4l2_frmivalenum *fival)
604 {
605 struct camera_data *cam = video_drvdata(file);
606 int max = ARRAY_SIZE(framerate_controls) - 1;
607 int i;
608
609 if (fival->pixel_format != V4L2_PIX_FMT_MJPEG &&
610 fival->pixel_format != V4L2_PIX_FMT_JPEG)
611 return -EINVAL;
612
613 /* Maximum 15 fps for this model */
614 if (cam->params.pnp_id.device_type == DEVICE_STV_672 &&
615 cam->params.version.sensor_flags == CPIA2_VP_SENSOR_FLAGS_500)
616 max -= 2;
617 if (fival->index > max)
618 return -EINVAL;
619 for (i = 0; i < ARRAY_SIZE(cpia2_framesizes); i++)
620 if (fival->width == cpia2_framesizes[i].width &&
621 fival->height == cpia2_framesizes[i].height)
622 break;
623 if (i == ARRAY_SIZE(cpia2_framesizes))
624 return -EINVAL;
625 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
626 fival->discrete = framerate_controls[fival->index].period;
627 return 0;
628 }
629
630 /******************************************************************************
631 *
632 * ioctl_s_ctrl
633 *
634 * V4L2 set the value of a control variable
635 *
636 *****************************************************************************/
637
638 static int cpia2_s_ctrl(struct v4l2_ctrl *ctrl)
639 {
640 struct camera_data *cam =
641 container_of(ctrl->handler, struct camera_data, hdl);
642 static const int flicker_table[] = {
643 NEVER_FLICKER,
644 FLICKER_50,
645 FLICKER_60,
646 };
647
648 DBG("Set control id:%d, value:%d\n", ctrl->id, ctrl->val);
649
650 switch (ctrl->id) {
651 case V4L2_CID_BRIGHTNESS:
652 cpia2_set_brightness(cam, ctrl->val);
653 break;
654 case V4L2_CID_CONTRAST:
655 cpia2_set_contrast(cam, ctrl->val);
656 break;
657 case V4L2_CID_SATURATION:
658 cpia2_set_saturation(cam, ctrl->val);
659 break;
660 case V4L2_CID_HFLIP:
661 cpia2_set_property_mirror(cam, ctrl->val);
662 break;
663 case V4L2_CID_VFLIP:
664 cpia2_set_property_flip(cam, ctrl->val);
665 break;
666 case V4L2_CID_POWER_LINE_FREQUENCY:
667 return cpia2_set_flicker_mode(cam, flicker_table[ctrl->val]);
668 case V4L2_CID_ILLUMINATORS_1:
669 return cpia2_set_gpio(cam, (cam->top_light->val << 6) |
670 (cam->bottom_light->val << 7));
671 case V4L2_CID_JPEG_ACTIVE_MARKER:
672 cam->params.compression.inhibit_htables =
673 !(ctrl->val & V4L2_JPEG_ACTIVE_MARKER_DHT);
674 break;
675 case V4L2_CID_JPEG_COMPRESSION_QUALITY:
676 cam->params.vc_params.quality = ctrl->val;
677 break;
678 case CPIA2_CID_USB_ALT:
679 cam->params.camera_state.stream_mode = ctrl->val;
680 break;
681 default:
682 return -EINVAL;
683 }
684
685 return 0;
686 }
687
688 /******************************************************************************
689 *
690 * ioctl_g_jpegcomp
691 *
692 * V4L2 get the JPEG compression parameters
693 *
694 *****************************************************************************/
695
696 static int cpia2_g_jpegcomp(struct file *file, void *fh, struct v4l2_jpegcompression *parms)
697 {
698 struct camera_data *cam = video_drvdata(file);
699
700 memset(parms, 0, sizeof(*parms));
701
702 parms->quality = 80; // TODO: Can this be made meaningful?
703
704 parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI;
705 if(!cam->params.compression.inhibit_htables) {
706 parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT;
707 }
708
709 parms->APPn = cam->APPn;
710 parms->APP_len = cam->APP_len;
711 if(cam->APP_len > 0) {
712 memcpy(parms->APP_data, cam->APP_data, cam->APP_len);
713 parms->jpeg_markers |= V4L2_JPEG_MARKER_APP;
714 }
715
716 parms->COM_len = cam->COM_len;
717 if(cam->COM_len > 0) {
718 memcpy(parms->COM_data, cam->COM_data, cam->COM_len);
719 parms->jpeg_markers |= JPEG_MARKER_COM;
720 }
721
722 DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n",
723 parms->APP_len, parms->COM_len);
724
725 return 0;
726 }
727
728 /******************************************************************************
729 *
730 * ioctl_s_jpegcomp
731 *
732 * V4L2 set the JPEG compression parameters
733 * NOTE: quality and some jpeg_markers are ignored.
734 *
735 *****************************************************************************/
736
737 static int cpia2_s_jpegcomp(struct file *file, void *fh,
738 const struct v4l2_jpegcompression *parms)
739 {
740 struct camera_data *cam = video_drvdata(file);
741
742 DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n",
743 parms->APP_len, parms->COM_len);
744
745 cam->params.compression.inhibit_htables =
746 !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
747
748 if(parms->APP_len != 0) {
749 if(parms->APP_len > 0 &&
750 parms->APP_len <= sizeof(cam->APP_data) &&
751 parms->APPn >= 0 && parms->APPn <= 15) {
752 cam->APPn = parms->APPn;
753 cam->APP_len = parms->APP_len;
754 memcpy(cam->APP_data, parms->APP_data, parms->APP_len);
755 } else {
756 LOG("Bad APPn Params n=%d len=%d\n",
757 parms->APPn, parms->APP_len);
758 return -EINVAL;
759 }
760 } else {
761 cam->APP_len = 0;
762 }
763
764 if(parms->COM_len != 0) {
765 if(parms->COM_len > 0 &&
766 parms->COM_len <= sizeof(cam->COM_data)) {
767 cam->COM_len = parms->COM_len;
768 memcpy(cam->COM_data, parms->COM_data, parms->COM_len);
769 } else {
770 LOG("Bad COM_len=%d\n", parms->COM_len);
771 return -EINVAL;
772 }
773 }
774
775 return 0;
776 }
777
778 /******************************************************************************
779 *
780 * ioctl_reqbufs
781 *
782 * V4L2 Initiate memory mapping.
783 * NOTE: The user's request is ignored. For now the buffers are fixed.
784 *
785 *****************************************************************************/
786
787 static int cpia2_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *req)
788 {
789 struct camera_data *cam = video_drvdata(file);
790
791 if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
792 req->memory != V4L2_MEMORY_MMAP)
793 return -EINVAL;
794
795 DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames);
796 req->count = cam->num_frames;
797 memset(&req->reserved, 0, sizeof(req->reserved));
798
799 return 0;
800 }
801
802 /******************************************************************************
803 *
804 * ioctl_querybuf
805 *
806 * V4L2 Query memory buffer status.
807 *
808 *****************************************************************************/
809
810 static int cpia2_querybuf(struct file *file, void *fh, struct v4l2_buffer *buf)
811 {
812 struct camera_data *cam = video_drvdata(file);
813
814 if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
815 buf->index > cam->num_frames)
816 return -EINVAL;
817
818 buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
819 buf->length = cam->frame_size;
820
821 buf->memory = V4L2_MEMORY_MMAP;
822
823 if(cam->mmapped)
824 buf->flags = V4L2_BUF_FLAG_MAPPED;
825 else
826 buf->flags = 0;
827
828 switch (cam->buffers[buf->index].status) {
829 case FRAME_EMPTY:
830 case FRAME_ERROR:
831 case FRAME_READING:
832 buf->bytesused = 0;
833 buf->flags = V4L2_BUF_FLAG_QUEUED;
834 break;
835 case FRAME_READY:
836 buf->bytesused = cam->buffers[buf->index].length;
837 buf->timestamp = cam->buffers[buf->index].timestamp;
838 buf->sequence = cam->buffers[buf->index].seq;
839 buf->flags = V4L2_BUF_FLAG_DONE;
840 break;
841 }
842
843 DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n",
844 buf->index, buf->m.offset, buf->flags, buf->sequence,
845 buf->bytesused);
846
847 return 0;
848 }
849
850 /******************************************************************************
851 *
852 * ioctl_qbuf
853 *
854 * V4L2 User is freeing buffer
855 *
856 *****************************************************************************/
857
858 static int cpia2_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
859 {
860 struct camera_data *cam = video_drvdata(file);
861
862 if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
863 buf->memory != V4L2_MEMORY_MMAP ||
864 buf->index > cam->num_frames)
865 return -EINVAL;
866
867 DBG("QBUF #%d\n", buf->index);
868
869 if(cam->buffers[buf->index].status == FRAME_READY)
870 cam->buffers[buf->index].status = FRAME_EMPTY;
871
872 return 0;
873 }
874
875 /******************************************************************************
876 *
877 * find_earliest_filled_buffer
878 *
879 * Helper for ioctl_dqbuf. Find the next ready buffer.
880 *
881 *****************************************************************************/
882
883 static int find_earliest_filled_buffer(struct camera_data *cam)
884 {
885 int i;
886 int found = -1;
887 for (i=0; i<cam->num_frames; i++) {
888 if(cam->buffers[i].status == FRAME_READY) {
889 if(found < 0) {
890 found = i;
891 } else {
892 /* find which buffer is earlier */
893 struct timeval *tv1, *tv2;
894 tv1 = &cam->buffers[i].timestamp;
895 tv2 = &cam->buffers[found].timestamp;
896 if(tv1->tv_sec < tv2->tv_sec ||
897 (tv1->tv_sec == tv2->tv_sec &&
898 tv1->tv_usec < tv2->tv_usec))
899 found = i;
900 }
901 }
902 }
903 return found;
904 }
905
906 /******************************************************************************
907 *
908 * ioctl_dqbuf
909 *
910 * V4L2 User is asking for a filled buffer.
911 *
912 *****************************************************************************/
913
914 static int cpia2_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
915 {
916 struct camera_data *cam = video_drvdata(file);
917 int frame;
918
919 if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
920 buf->memory != V4L2_MEMORY_MMAP)
921 return -EINVAL;
922
923 frame = find_earliest_filled_buffer(cam);
924
925 if(frame < 0 && file->f_flags&O_NONBLOCK)
926 return -EAGAIN;
927
928 if(frame < 0) {
929 /* Wait for a frame to become available */
930 struct framebuf *cb=cam->curbuff;
931 mutex_unlock(&cam->v4l2_lock);
932 wait_event_interruptible(cam->wq_stream,
933 !video_is_registered(&cam->vdev) ||
934 (cb=cam->curbuff)->status == FRAME_READY);
935 mutex_lock(&cam->v4l2_lock);
936 if (signal_pending(current))
937 return -ERESTARTSYS;
938 if (!video_is_registered(&cam->vdev))
939 return -ENOTTY;
940 frame = cb->num;
941 }
942
943
944 buf->index = frame;
945 buf->bytesused = cam->buffers[buf->index].length;
946 buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE;
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->reserved = 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
962 static 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
980 static 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 * cpia2_mmap
1000 *
1001 *****************************************************************************/
1002 static 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 * reset_camera_struct_v4l
1020 *
1021 * Sets all values to the defaults
1022 *****************************************************************************/
1023 static 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 /* Flicker modes */
1032 cam->params.flicker_control.flicker_mode_req = flicker_mode;
1033
1034 /* stream modes */
1035 cam->params.camera_state.stream_mode = alternate;
1036
1037 cam->pixelformat = V4L2_PIX_FMT_JPEG;
1038 }
1039
1040 static 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_cropcap = cpia2_cropcap,
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 * The v4l video device structure initialized for this device
1068 ***/
1069 static 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
1079 static struct video_device cpia2_template = {
1080 /* I could not find any place for the old .initialize initializer?? */
1081 .name = "CPiA2 Camera",
1082 .fops = &cpia2_fops,
1083 .ioctl_ops = &cpia2_ioctl_ops,
1084 .release = video_device_release_empty,
1085 };
1086
1087 void 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
1097 static const struct v4l2_ctrl_ops cpia2_ctrl_ops = {
1098 .s_ctrl = cpia2_s_ctrl,
1099 };
1100
1101 /******************************************************************************
1102 *
1103 * cpia2_register_camera
1104 *
1105 *****************************************************************************/
1106 int 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 /* VP5 Only */
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 /* Flicker control only valid for 672 */
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 /* Light control only valid for the QX5 Microscope */
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 set_bit(V4L2_FL_USE_FH_PRIO, &cam->vdev.flags);
1170
1171 reset_camera_struct_v4l(cam);
1172
1173 /* register v4l device */
1174 if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
1175 ERR("video_register_device failed\n");
1176 return -ENODEV;
1177 }
1178
1179 return 0;
1180 }
1181
1182 /******************************************************************************
1183 *
1184 * cpia2_unregister_camera
1185 *
1186 *****************************************************************************/
1187 void cpia2_unregister_camera(struct camera_data *cam)
1188 {
1189 video_unregister_device(&cam->vdev);
1190 }
1191
1192 /******************************************************************************
1193 *
1194 * check_parameters
1195 *
1196 * Make sure that all user-supplied parameters are sensible
1197 *****************************************************************************/
1198 static void __init check_parameters(void)
1199 {
1200 if(buffer_size < PAGE_SIZE) {
1201 buffer_size = PAGE_SIZE;
1202 LOG("buffer_size too small, setting to %d\n", buffer_size);
1203 } else if(buffer_size > 1024*1024) {
1204 /* arbitrary upper limiit */
1205 buffer_size = 1024*1024;
1206 LOG("buffer_size ridiculously large, setting to %d\n",
1207 buffer_size);
1208 } else {
1209 buffer_size += PAGE_SIZE-1;
1210 buffer_size &= ~(PAGE_SIZE-1);
1211 }
1212
1213 if(num_buffers < 1) {
1214 num_buffers = 1;
1215 LOG("num_buffers too small, setting to %d\n", num_buffers);
1216 } else if(num_buffers > VIDEO_MAX_FRAME) {
1217 num_buffers = VIDEO_MAX_FRAME;
1218 LOG("num_buffers too large, setting to %d\n", num_buffers);
1219 }
1220
1221 if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) {
1222 alternate = DEFAULT_ALT;
1223 LOG("alternate specified is invalid, using %d\n", alternate);
1224 }
1225
1226 if (flicker_mode != 0 && flicker_mode != FLICKER_50 && flicker_mode != FLICKER_60) {
1227 flicker_mode = 0;
1228 LOG("Flicker mode specified is invalid, using %d\n",
1229 flicker_mode);
1230 }
1231
1232 DBG("Using %d buffers, each %d bytes, alternate=%d\n",
1233 num_buffers, buffer_size, alternate);
1234 }
1235
1236 /************ Module Stuff ***************/
1237
1238
1239 /******************************************************************************
1240 *
1241 * cpia2_init/module_init
1242 *
1243 *****************************************************************************/
1244 static int __init cpia2_init(void)
1245 {
1246 LOG("%s v%s\n",
1247 ABOUT, CPIA_VERSION);
1248 check_parameters();
1249 cpia2_usb_init();
1250 return 0;
1251 }
1252
1253
1254 /******************************************************************************
1255 *
1256 * cpia2_exit/module_exit
1257 *
1258 *****************************************************************************/
1259 static void __exit cpia2_exit(void)
1260 {
1261 cpia2_usb_cleanup();
1262 schedule_timeout(2 * HZ);
1263 }
1264
1265 module_init(cpia2_init);
1266 module_exit(cpia2_exit);
Linux kernel - Deliverables
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