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[linux-rt-nao.git] / drivers / media / video / cpia2 / cpia2_v4l.c
blob9c25894fdd8e7b19050ae7c3e58d67d45c5b11d7
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 #include <linux/version.h>
33
34
35 #include <linux/module.h>
36 #include <linux/time.h>
37 #include <linux/sched.h>
38 #include <linux/slab.h>
39 #include <linux/init.h>
40 #include <media/v4l2-ioctl.h>
41
42 #include "cpia2.h"
43 #include "cpia2dev.h"
44
45
46 //#define _CPIA2_DEBUG_
47
48 #define MAKE_STRING_1(x) #x
49 #define MAKE_STRING(x) MAKE_STRING_1(x)
50
51 static int video_nr = -1;
52 module_param(video_nr, int, 0);
53 MODULE_PARM_DESC(video_nr,"video device to register (0=/dev/video0, etc)");
54
55 static int buffer_size = 68*1024;
56 module_param(buffer_size, int, 0);
57 MODULE_PARM_DESC(buffer_size, "Size for each frame buffer in bytes (default 68k)");
58
59 static int num_buffers = 3;
60 module_param(num_buffers, int, 0);
61 MODULE_PARM_DESC(num_buffers, "Number of frame buffers (1-"
62 MAKE_STRING(VIDEO_MAX_FRAME) ", default 3)");
63
64 static int alternate = DEFAULT_ALT;
65 module_param(alternate, int, 0);
66 MODULE_PARM_DESC(alternate, "USB Alternate (" MAKE_STRING(USBIF_ISO_1) "-"
67 MAKE_STRING(USBIF_ISO_6) ", default "
68 MAKE_STRING(DEFAULT_ALT) ")");
69
70 static int flicker_freq = 60;
71 module_param(flicker_freq, int, 0);
72 MODULE_PARM_DESC(flicker_freq, "Flicker frequency (" MAKE_STRING(50) "or"
73 MAKE_STRING(60) ", default "
74 MAKE_STRING(60) ")");
75
76 static int flicker_mode = NEVER_FLICKER;
77 module_param(flicker_mode, int, 0);
78 MODULE_PARM_DESC(flicker_mode,
79 "Flicker supression (" MAKE_STRING(NEVER_FLICKER) "or"
80 MAKE_STRING(ANTI_FLICKER_ON) ", default "
81 MAKE_STRING(NEVER_FLICKER) ")");
82
83 MODULE_AUTHOR("Steve Miller (STMicroelectronics) <steve.miller@st.com>");
84 MODULE_DESCRIPTION("V4L-driver for STMicroelectronics CPiA2 based cameras");
85 MODULE_SUPPORTED_DEVICE("video");
86 MODULE_LICENSE("GPL");
87
88 #define ABOUT "V4L-Driver for Vision CPiA2 based cameras"
89
90 struct control_menu_info {
91 int value;
92 char name[32];
93 };
94
95 static struct control_menu_info framerate_controls[] =
96 {
97 { CPIA2_VP_FRAMERATE_6_25, "6.25 fps" },
98 { CPIA2_VP_FRAMERATE_7_5, "7.5 fps" },
99 { CPIA2_VP_FRAMERATE_12_5, "12.5 fps" },
100 { CPIA2_VP_FRAMERATE_15, "15 fps" },
101 { CPIA2_VP_FRAMERATE_25, "25 fps" },
102 { CPIA2_VP_FRAMERATE_30, "30 fps" },
103 };
104 #define NUM_FRAMERATE_CONTROLS (ARRAY_SIZE(framerate_controls))
105
106 static struct control_menu_info flicker_controls[] =
107 {
108 { NEVER_FLICKER, "Off" },
109 { FLICKER_50, "50 Hz" },
110 { FLICKER_60, "60 Hz" },
111 };
112 #define NUM_FLICKER_CONTROLS (ARRAY_SIZE(flicker_controls))
113
114 static struct control_menu_info lights_controls[] =
115 {
116 { 0, "Off" },
117 { 64, "Top" },
118 { 128, "Bottom" },
119 { 192, "Both" },
120 };
121 #define NUM_LIGHTS_CONTROLS (ARRAY_SIZE(lights_controls))
122 #define GPIO_LIGHTS_MASK 192
123
124 static struct v4l2_queryctrl controls[] = {
125 {
126 .id = V4L2_CID_BRIGHTNESS,
127 .type = V4L2_CTRL_TYPE_INTEGER,
128 .name = "Brightness",
129 .minimum = 0,
130 .maximum = 255,
131 .step = 1,
132 .default_value = DEFAULT_BRIGHTNESS,
133 },
134 {
135 .id = V4L2_CID_CONTRAST,
136 .type = V4L2_CTRL_TYPE_INTEGER,
137 .name = "Contrast",
138 .minimum = 0,
139 .maximum = 255,
140 .step = 1,
141 .default_value = DEFAULT_CONTRAST,
142 },
143 {
144 .id = V4L2_CID_SATURATION,
145 .type = V4L2_CTRL_TYPE_INTEGER,
146 .name = "Saturation",
147 .minimum = 0,
148 .maximum = 255,
149 .step = 1,
150 .default_value = DEFAULT_SATURATION,
151 },
152 {
153 .id = V4L2_CID_HFLIP,
154 .type = V4L2_CTRL_TYPE_BOOLEAN,
155 .name = "Mirror Horizontally",
156 .minimum = 0,
157 .maximum = 1,
158 .step = 1,
159 .default_value = 0,
160 },
161 {
162 .id = V4L2_CID_VFLIP,
163 .type = V4L2_CTRL_TYPE_BOOLEAN,
164 .name = "Flip Vertically",
165 .minimum = 0,
166 .maximum = 1,
167 .step = 1,
168 .default_value = 0,
169 },
170 {
171 .id = CPIA2_CID_TARGET_KB,
172 .type = V4L2_CTRL_TYPE_INTEGER,
173 .name = "Target KB",
174 .minimum = 0,
175 .maximum = 255,
176 .step = 1,
177 .default_value = DEFAULT_TARGET_KB,
178 },
179 {
180 .id = CPIA2_CID_GPIO,
181 .type = V4L2_CTRL_TYPE_INTEGER,
182 .name = "GPIO",
183 .minimum = 0,
184 .maximum = 255,
185 .step = 1,
186 .default_value = 0,
187 },
188 {
189 .id = CPIA2_CID_FLICKER_MODE,
190 .type = V4L2_CTRL_TYPE_MENU,
191 .name = "Flicker Reduction",
192 .minimum = 0,
193 .maximum = NUM_FLICKER_CONTROLS-1,
194 .step = 1,
195 .default_value = 0,
196 },
197 {
198 .id = CPIA2_CID_FRAMERATE,
199 .type = V4L2_CTRL_TYPE_MENU,
200 .name = "Framerate",
201 .minimum = 0,
202 .maximum = NUM_FRAMERATE_CONTROLS-1,
203 .step = 1,
204 .default_value = NUM_FRAMERATE_CONTROLS-1,
205 },
206 {
207 .id = CPIA2_CID_USB_ALT,
208 .type = V4L2_CTRL_TYPE_INTEGER,
209 .name = "USB Alternate",
210 .minimum = USBIF_ISO_1,
211 .maximum = USBIF_ISO_6,
212 .step = 1,
213 .default_value = DEFAULT_ALT,
214 },
215 {
216 .id = CPIA2_CID_LIGHTS,
217 .type = V4L2_CTRL_TYPE_MENU,
218 .name = "Lights",
219 .minimum = 0,
220 .maximum = NUM_LIGHTS_CONTROLS-1,
221 .step = 1,
222 .default_value = 0,
223 },
224 {
225 .id = CPIA2_CID_RESET_CAMERA,
226 .type = V4L2_CTRL_TYPE_BUTTON,
227 .name = "Reset Camera",
228 .minimum = 0,
229 .maximum = 0,
230 .step = 0,
231 .default_value = 0,
232 },
233 };
234 #define NUM_CONTROLS (ARRAY_SIZE(controls))
235
236
237 /******************************************************************************
238 *
239 * cpia2_open
240 *
241 *****************************************************************************/
242 static int cpia2_open(struct file *file)
243 {
244 struct camera_data *cam = video_drvdata(file);
245 int retval = 0;
246
247 if (!cam) {
248 ERR("Internal error, camera_data not found!\n");
249 return -ENODEV;
250 }
251
252 if(mutex_lock_interruptible(&cam->busy_lock))
253 return -ERESTARTSYS;
254
255 if(!cam->present) {
256 retval = -ENODEV;
257 goto err_return;
258 }
259
260 if (cam->open_count > 0) {
261 goto skip_init;
262 }
263
264 if (cpia2_allocate_buffers(cam)) {
265 retval = -ENOMEM;
266 goto err_return;
267 }
268
269 /* reset the camera */
270 if (cpia2_reset_camera(cam) < 0) {
271 retval = -EIO;
272 goto err_return;
273 }
274
275 cam->APP_len = 0;
276 cam->COM_len = 0;
277
278 skip_init:
279 {
280 struct cpia2_fh *fh = kmalloc(sizeof(*fh),GFP_KERNEL);
281 if(!fh) {
282 retval = -ENOMEM;
283 goto err_return;
284 }
285 file->private_data = fh;
286 fh->prio = V4L2_PRIORITY_UNSET;
287 v4l2_prio_open(&cam->prio, &fh->prio);
288 fh->mmapped = 0;
289 }
290
291 ++cam->open_count;
292
293 cpia2_dbg_dump_registers(cam);
294
295 err_return:
296 mutex_unlock(&cam->busy_lock);
297 return retval;
298 }
299
300 /******************************************************************************
301 *
302 * cpia2_close
303 *
304 *****************************************************************************/
305 static int cpia2_close(struct file *file)
306 {
307 struct video_device *dev = video_devdata(file);
308 struct camera_data *cam = video_get_drvdata(dev);
309 struct cpia2_fh *fh = file->private_data;
310
311 mutex_lock(&cam->busy_lock);
312
313 if (cam->present &&
314 (cam->open_count == 1
315 || fh->prio == V4L2_PRIORITY_RECORD
316 )) {
317 cpia2_usb_stream_stop(cam);
318
319 if(cam->open_count == 1) {
320 /* save camera state for later open */
321 cpia2_save_camera_state(cam);
322
323 cpia2_set_low_power(cam);
324 cpia2_free_buffers(cam);
325 }
326 }
327
328 {
329 if(fh->mmapped)
330 cam->mmapped = 0;
331 v4l2_prio_close(&cam->prio,&fh->prio);
332 file->private_data = NULL;
333 kfree(fh);
334 }
335
336 if (--cam->open_count == 0) {
337 cpia2_free_buffers(cam);
338 if (!cam->present) {
339 video_unregister_device(dev);
340 mutex_unlock(&cam->busy_lock);
341 kfree(cam);
342 return 0;
343 }
344 }
345
346 mutex_unlock(&cam->busy_lock);
347
348 return 0;
349 }
350
351 /******************************************************************************
352 *
353 * cpia2_v4l_read
354 *
355 *****************************************************************************/
356 static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count,
357 loff_t *off)
358 {
359 struct camera_data *cam = video_drvdata(file);
360 int noblock = file->f_flags&O_NONBLOCK;
361
362 struct cpia2_fh *fh = file->private_data;
363
364 if(!cam)
365 return -EINVAL;
366
367 /* Priority check */
368 if(fh->prio != V4L2_PRIORITY_RECORD) {
369 return -EBUSY;
370 }
371
372 return cpia2_read(cam, buf, count, noblock);
373 }
374
375
376 /******************************************************************************
377 *
378 * cpia2_v4l_poll
379 *
380 *****************************************************************************/
381 static unsigned int cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait)
382 {
383 struct camera_data *cam = video_drvdata(filp);
384 struct cpia2_fh *fh = filp->private_data;
385
386 if(!cam)
387 return POLLERR;
388
389 /* Priority check */
390 if(fh->prio != V4L2_PRIORITY_RECORD) {
391 return POLLERR;
392 }
393
394 return cpia2_poll(cam, filp, wait);
395 }
396
397
398 /******************************************************************************
399 *
400 * ioctl_cap_query
401 *
402 *****************************************************************************/
403 static int ioctl_cap_query(void *arg, struct camera_data *cam)
404 {
405 struct video_capability *vc;
406 int retval = 0;
407 vc = arg;
408
409 if (cam->params.pnp_id.product == 0x151)
410 strcpy(vc->name, "QX5 Microscope");
411 else
412 strcpy(vc->name, "CPiA2 Camera");
413
414 vc->type = VID_TYPE_CAPTURE | VID_TYPE_MJPEG_ENCODER;
415 vc->channels = 1;
416 vc->audios = 0;
417 vc->minwidth = 176; /* VIDEOSIZE_QCIF */
418 vc->minheight = 144;
419 switch (cam->params.version.sensor_flags) {
420 case CPIA2_VP_SENSOR_FLAGS_500:
421 vc->maxwidth = STV_IMAGE_VGA_COLS;
422 vc->maxheight = STV_IMAGE_VGA_ROWS;
423 break;
424 case CPIA2_VP_SENSOR_FLAGS_410:
425 vc->maxwidth = STV_IMAGE_CIF_COLS;
426 vc->maxheight = STV_IMAGE_CIF_ROWS;
427 break;
428 default:
429 return -EINVAL;
430 }
431
432 return retval;
433 }
434
435 /******************************************************************************
436 *
437 * ioctl_get_channel
438 *
439 *****************************************************************************/
440 static int ioctl_get_channel(void *arg)
441 {
442 int retval = 0;
443 struct video_channel *v;
444 v = arg;
445
446 if (v->channel != 0)
447 return -EINVAL;
448
449 v->channel = 0;
450 strcpy(v->name, "Camera");
451 v->tuners = 0;
452 v->flags = 0;
453 v->type = VIDEO_TYPE_CAMERA;
454 v->norm = 0;
455
456 return retval;
457 }
458
459 /******************************************************************************
460 *
461 * ioctl_set_channel
462 *
463 *****************************************************************************/
464 static int ioctl_set_channel(void *arg)
465 {
466 struct video_channel *v;
467 int retval = 0;
468 v = arg;
469
470 if (retval == 0 && v->channel != 0)
471 retval = -EINVAL;
472
473 return retval;
474 }
475
476 /******************************************************************************
477 *
478 * ioctl_set_image_prop
479 *
480 *****************************************************************************/
481 static int ioctl_set_image_prop(void *arg, struct camera_data *cam)
482 {
483 struct video_picture *vp;
484 int retval = 0;
485 vp = arg;
486
487 /* brightness, color, contrast need no check 0-65535 */
488 memcpy(&cam->vp, vp, sizeof(*vp));
489
490 /* update cam->params.colorParams */
491 cam->params.color_params.brightness = vp->brightness / 256;
492 cam->params.color_params.saturation = vp->colour / 256;
493 cam->params.color_params.contrast = vp->contrast / 256;
494
495 DBG("Requested params: bright 0x%X, sat 0x%X, contrast 0x%X\n",
496 cam->params.color_params.brightness,
497 cam->params.color_params.saturation,
498 cam->params.color_params.contrast);
499
500 cpia2_set_color_params(cam);
501
502 return retval;
503 }
504
505 static int sync(struct camera_data *cam, int frame_nr)
506 {
507 struct framebuf *frame = &cam->buffers[frame_nr];
508
509 while (1) {
510 if (frame->status == FRAME_READY)
511 return 0;
512
513 if (!cam->streaming) {
514 frame->status = FRAME_READY;
515 frame->length = 0;
516 return 0;
517 }
518
519 mutex_unlock(&cam->busy_lock);
520 wait_event_interruptible(cam->wq_stream,
521 !cam->streaming ||
522 frame->status == FRAME_READY);
523 mutex_lock(&cam->busy_lock);
524 if (signal_pending(current))
525 return -ERESTARTSYS;
526 if(!cam->present)
527 return -ENOTTY;
528 }
529 }
530
531 /******************************************************************************
532 *
533 * ioctl_set_window_size
534 *
535 *****************************************************************************/
536 static int ioctl_set_window_size(void *arg, struct camera_data *cam,
537 struct cpia2_fh *fh)
538 {
539 /* copy_from_user, check validity, copy to internal structure */
540 struct video_window *vw;
541 int frame, err;
542 vw = arg;
543
544 if (vw->clipcount != 0) /* clipping not supported */
545 return -EINVAL;
546
547 if (vw->clips != NULL) /* clipping not supported */
548 return -EINVAL;
549
550 /* Ensure that only this process can change the format. */
551 err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
552 if(err != 0)
553 return err;
554
555 cam->pixelformat = V4L2_PIX_FMT_JPEG;
556
557 /* Be sure to supply the Huffman tables, this isn't MJPEG */
558 cam->params.compression.inhibit_htables = 0;
559
560 /* we set the video window to something smaller or equal to what
561 * is requested by the user???
562 */
563 DBG("Requested width = %d, height = %d\n", vw->width, vw->height);
564 if (vw->width != cam->vw.width || vw->height != cam->vw.height) {
565 cam->vw.width = vw->width;
566 cam->vw.height = vw->height;
567 cam->params.roi.width = vw->width;
568 cam->params.roi.height = vw->height;
569 cpia2_set_format(cam);
570 }
571
572 for (frame = 0; frame < cam->num_frames; ++frame) {
573 if (cam->buffers[frame].status == FRAME_READING)
574 if ((err = sync(cam, frame)) < 0)
575 return err;
576
577 cam->buffers[frame].status = FRAME_EMPTY;
578 }
579
580 return 0;
581 }
582
583 /******************************************************************************
584 *
585 * ioctl_get_mbuf
586 *
587 *****************************************************************************/
588 static int ioctl_get_mbuf(void *arg, struct camera_data *cam)
589 {
590 struct video_mbuf *vm;
591 int i;
592 vm = arg;
593
594 memset(vm, 0, sizeof(*vm));
595 vm->size = cam->frame_size*cam->num_frames;
596 vm->frames = cam->num_frames;
597 for (i = 0; i < cam->num_frames; i++)
598 vm->offsets[i] = cam->frame_size * i;
599
600 return 0;
601 }
602
603 /******************************************************************************
604 *
605 * ioctl_mcapture
606 *
607 *****************************************************************************/
608 static int ioctl_mcapture(void *arg, struct camera_data *cam,
609 struct cpia2_fh *fh)
610 {
611 struct video_mmap *vm;
612 int video_size, err;
613 vm = arg;
614
615 if (vm->frame < 0 || vm->frame >= cam->num_frames)
616 return -EINVAL;
617
618 /* set video size */
619 video_size = cpia2_match_video_size(vm->width, vm->height);
620 if (cam->video_size < 0) {
621 return -EINVAL;
622 }
623
624 /* Ensure that only this process can change the format. */
625 err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
626 if(err != 0)
627 return err;
628
629 if (video_size != cam->video_size) {
630 cam->video_size = video_size;
631 cam->params.roi.width = vm->width;
632 cam->params.roi.height = vm->height;
633 cpia2_set_format(cam);
634 }
635
636 if (cam->buffers[vm->frame].status == FRAME_READING)
637 if ((err=sync(cam, vm->frame)) < 0)
638 return err;
639
640 cam->buffers[vm->frame].status = FRAME_EMPTY;
641
642 return cpia2_usb_stream_start(cam,cam->params.camera_state.stream_mode);
643 }
644
645 /******************************************************************************
646 *
647 * ioctl_sync
648 *
649 *****************************************************************************/
650 static int ioctl_sync(void *arg, struct camera_data *cam)
651 {
652 int frame;
653
654 frame = *(int*)arg;
655
656 if (frame < 0 || frame >= cam->num_frames)
657 return -EINVAL;
658
659 return sync(cam, frame);
660 }
661
662
663 /******************************************************************************
664 *
665 * ioctl_set_gpio
666 *
667 *****************************************************************************/
668
669 static int ioctl_set_gpio(void *arg, struct camera_data *cam)
670 {
671 __u32 gpio_val;
672
673 gpio_val = *(__u32*) arg;
674
675 if (gpio_val &~ 0xFFU)
676 return -EINVAL;
677
678 return cpia2_set_gpio(cam, (unsigned char)gpio_val);
679 }
680
681 /******************************************************************************
682 *
683 * ioctl_querycap
684 *
685 * V4L2 device capabilities
686 *
687 *****************************************************************************/
688
689 static int ioctl_querycap(void *arg, struct camera_data *cam)
690 {
691 struct v4l2_capability *vc = arg;
692
693 memset(vc, 0, sizeof(*vc));
694 strcpy(vc->driver, "cpia2");
695
696 if (cam->params.pnp_id.product == 0x151)
697 strcpy(vc->card, "QX5 Microscope");
698 else
699 strcpy(vc->card, "CPiA2 Camera");
700 switch (cam->params.pnp_id.device_type) {
701 case DEVICE_STV_672:
702 strcat(vc->card, " (672/");
703 break;
704 case DEVICE_STV_676:
705 strcat(vc->card, " (676/");
706 break;
707 default:
708 strcat(vc->card, " (???/");
709 break;
710 }
711 switch (cam->params.version.sensor_flags) {
712 case CPIA2_VP_SENSOR_FLAGS_404:
713 strcat(vc->card, "404)");
714 break;
715 case CPIA2_VP_SENSOR_FLAGS_407:
716 strcat(vc->card, "407)");
717 break;
718 case CPIA2_VP_SENSOR_FLAGS_409:
719 strcat(vc->card, "409)");
720 break;
721 case CPIA2_VP_SENSOR_FLAGS_410:
722 strcat(vc->card, "410)");
723 break;
724 case CPIA2_VP_SENSOR_FLAGS_500:
725 strcat(vc->card, "500)");
726 break;
727 default:
728 strcat(vc->card, "???)");
729 break;
730 }
731
732 if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0)
733 memset(vc->bus_info,0, sizeof(vc->bus_info));
734
735 vc->version = KERNEL_VERSION(CPIA2_MAJ_VER, CPIA2_MIN_VER,
736 CPIA2_PATCH_VER);
737
738 vc->capabilities = V4L2_CAP_VIDEO_CAPTURE |
739 V4L2_CAP_READWRITE |
740 V4L2_CAP_STREAMING;
741
742 return 0;
743 }
744
745 /******************************************************************************
746 *
747 * ioctl_input
748 *
749 * V4L2 input get/set/enumerate
750 *
751 *****************************************************************************/
752
753 static int ioctl_input(unsigned int ioclt_nr,void *arg,struct camera_data *cam)
754 {
755 struct v4l2_input *i = arg;
756
757 if(ioclt_nr != VIDIOC_G_INPUT) {
758 if (i->index != 0)
759 return -EINVAL;
760 }
761
762 memset(i, 0, sizeof(*i));
763 strcpy(i->name, "Camera");
764 i->type = V4L2_INPUT_TYPE_CAMERA;
765
766 return 0;
767 }
768
769 /******************************************************************************
770 *
771 * ioctl_enum_fmt
772 *
773 * V4L2 format enumerate
774 *
775 *****************************************************************************/
776
777 static int ioctl_enum_fmt(void *arg,struct camera_data *cam)
778 {
779 struct v4l2_fmtdesc *f = arg;
780 int index = f->index;
781
782 if (index < 0 || index > 1)
783 return -EINVAL;
784
785 memset(f, 0, sizeof(*f));
786 f->index = index;
787 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
788 f->flags = V4L2_FMT_FLAG_COMPRESSED;
789 switch(index) {
790 case 0:
791 strcpy(f->description, "MJPEG");
792 f->pixelformat = V4L2_PIX_FMT_MJPEG;
793 break;
794 case 1:
795 strcpy(f->description, "JPEG");
796 f->pixelformat = V4L2_PIX_FMT_JPEG;
797 break;
798 default:
799 return -EINVAL;
800 }
801
802 return 0;
803 }
804
805 /******************************************************************************
806 *
807 * ioctl_try_fmt
808 *
809 * V4L2 format try
810 *
811 *****************************************************************************/
812
813 static int ioctl_try_fmt(void *arg,struct camera_data *cam)
814 {
815 struct v4l2_format *f = arg;
816
817 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
818 return -EINVAL;
819
820 if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG &&
821 f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
822 return -EINVAL;
823
824 f->fmt.pix.field = V4L2_FIELD_NONE;
825 f->fmt.pix.bytesperline = 0;
826 f->fmt.pix.sizeimage = cam->frame_size;
827 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
828 f->fmt.pix.priv = 0;
829
830 switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
831 case VIDEOSIZE_VGA:
832 f->fmt.pix.width = 640;
833 f->fmt.pix.height = 480;
834 break;
835 case VIDEOSIZE_CIF:
836 f->fmt.pix.width = 352;
837 f->fmt.pix.height = 288;
838 break;
839 case VIDEOSIZE_QVGA:
840 f->fmt.pix.width = 320;
841 f->fmt.pix.height = 240;
842 break;
843 case VIDEOSIZE_288_216:
844 f->fmt.pix.width = 288;
845 f->fmt.pix.height = 216;
846 break;
847 case VIDEOSIZE_256_192:
848 f->fmt.pix.width = 256;
849 f->fmt.pix.height = 192;
850 break;
851 case VIDEOSIZE_224_168:
852 f->fmt.pix.width = 224;
853 f->fmt.pix.height = 168;
854 break;
855 case VIDEOSIZE_192_144:
856 f->fmt.pix.width = 192;
857 f->fmt.pix.height = 144;
858 break;
859 case VIDEOSIZE_QCIF:
860 default:
861 f->fmt.pix.width = 176;
862 f->fmt.pix.height = 144;
863 break;
864 }
865
866 return 0;
867 }
868
869 /******************************************************************************
870 *
871 * ioctl_set_fmt
872 *
873 * V4L2 format set
874 *
875 *****************************************************************************/
876
877 static int ioctl_set_fmt(void *arg,struct camera_data *cam, struct cpia2_fh *fh)
878 {
879 struct v4l2_format *f = arg;
880 int err, frame;
881
882 err = ioctl_try_fmt(arg, cam);
883 if(err != 0)
884 return err;
885
886 /* Ensure that only this process can change the format. */
887 err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
888 if(err != 0) {
889 return err;
890 }
891
892 cam->pixelformat = f->fmt.pix.pixelformat;
893
894 /* NOTE: This should be set to 1 for MJPEG, but some apps don't handle
895 * the missing Huffman table properly. */
896 cam->params.compression.inhibit_htables = 0;
897 /*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/
898
899 /* we set the video window to something smaller or equal to what
900 * is requested by the user???
901 */
902 DBG("Requested width = %d, height = %d\n",
903 f->fmt.pix.width, f->fmt.pix.height);
904 if (f->fmt.pix.width != cam->vw.width ||
905 f->fmt.pix.height != cam->vw.height) {
906 cam->vw.width = f->fmt.pix.width;
907 cam->vw.height = f->fmt.pix.height;
908 cam->params.roi.width = f->fmt.pix.width;
909 cam->params.roi.height = f->fmt.pix.height;
910 cpia2_set_format(cam);
911 }
912
913 for (frame = 0; frame < cam->num_frames; ++frame) {
914 if (cam->buffers[frame].status == FRAME_READING)
915 if ((err = sync(cam, frame)) < 0)
916 return err;
917
918 cam->buffers[frame].status = FRAME_EMPTY;
919 }
920
921 return 0;
922 }
923
924 /******************************************************************************
925 *
926 * ioctl_get_fmt
927 *
928 * V4L2 format get
929 *
930 *****************************************************************************/
931
932 static int ioctl_get_fmt(void *arg,struct camera_data *cam)
933 {
934 struct v4l2_format *f = arg;
935
936 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
937 return -EINVAL;
938
939 f->fmt.pix.width = cam->vw.width;
940 f->fmt.pix.height = cam->vw.height;
941 f->fmt.pix.pixelformat = cam->pixelformat;
942 f->fmt.pix.field = V4L2_FIELD_NONE;
943 f->fmt.pix.bytesperline = 0;
944 f->fmt.pix.sizeimage = cam->frame_size;
945 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
946 f->fmt.pix.priv = 0;
947
948 return 0;
949 }
950
951 /******************************************************************************
952 *
953 * ioctl_cropcap
954 *
955 * V4L2 query cropping capabilities
956 * NOTE: cropping is currently disabled
957 *
958 *****************************************************************************/
959
960 static int ioctl_cropcap(void *arg,struct camera_data *cam)
961 {
962 struct v4l2_cropcap *c = arg;
963
964 if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
965 return -EINVAL;
966
967 c->bounds.left = 0;
968 c->bounds.top = 0;
969 c->bounds.width = cam->vw.width;
970 c->bounds.height = cam->vw.height;
971 c->defrect.left = 0;
972 c->defrect.top = 0;
973 c->defrect.width = cam->vw.width;
974 c->defrect.height = cam->vw.height;
975 c->pixelaspect.numerator = 1;
976 c->pixelaspect.denominator = 1;
977
978 return 0;
979 }
980
981 /******************************************************************************
982 *
983 * ioctl_queryctrl
984 *
985 * V4L2 query possible control variables
986 *
987 *****************************************************************************/
988
989 static int ioctl_queryctrl(void *arg,struct camera_data *cam)
990 {
991 struct v4l2_queryctrl *c = arg;
992 int i;
993
994 for(i=0; i<NUM_CONTROLS; ++i) {
995 if(c->id == controls[i].id) {
996 memcpy(c, controls+i, sizeof(*c));
997 break;
998 }
999 }
1000
1001 if(i == NUM_CONTROLS)
1002 return -EINVAL;
1003
1004 /* Some devices have additional limitations */
1005 switch(c->id) {
1006 case V4L2_CID_BRIGHTNESS:
1007 /***
1008 * Don't let the register be set to zero - bug in VP4
1009 * flash of full brightness
1010 ***/
1011 if (cam->params.pnp_id.device_type == DEVICE_STV_672)
1012 c->minimum = 1;
1013 break;
1014 case V4L2_CID_VFLIP:
1015 // VP5 Only
1016 if(cam->params.pnp_id.device_type == DEVICE_STV_672)
1017 c->flags |= V4L2_CTRL_FLAG_DISABLED;
1018 break;
1019 case CPIA2_CID_FRAMERATE:
1020 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
1021 cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
1022 // Maximum 15fps
1023 for(i=0; i<c->maximum; ++i) {
1024 if(framerate_controls[i].value ==
1025 CPIA2_VP_FRAMERATE_15) {
1026 c->maximum = i;
1027 c->default_value = i;
1028 }
1029 }
1030 }
1031 break;
1032 case CPIA2_CID_FLICKER_MODE:
1033 // Flicker control only valid for 672.
1034 if(cam->params.pnp_id.device_type != DEVICE_STV_672)
1035 c->flags |= V4L2_CTRL_FLAG_DISABLED;
1036 break;
1037 case CPIA2_CID_LIGHTS:
1038 // Light control only valid for the QX5 Microscope.
1039 if(cam->params.pnp_id.product != 0x151)
1040 c->flags |= V4L2_CTRL_FLAG_DISABLED;
1041 break;
1042 default:
1043 break;
1044 }
1045
1046 return 0;
1047 }
1048
1049 /******************************************************************************
1050 *
1051 * ioctl_querymenu
1052 *
1053 * V4L2 query possible control variables
1054 *
1055 *****************************************************************************/
1056
1057 static int ioctl_querymenu(void *arg,struct camera_data *cam)
1058 {
1059 struct v4l2_querymenu *m = arg;
1060
1061 memset(m->name, 0, sizeof(m->name));
1062 m->reserved = 0;
1063
1064 switch(m->id) {
1065 case CPIA2_CID_FLICKER_MODE:
1066 if(m->index < 0 || m->index >= NUM_FLICKER_CONTROLS)
1067 return -EINVAL;
1068
1069 strcpy(m->name, flicker_controls[m->index].name);
1070 break;
1071 case CPIA2_CID_FRAMERATE:
1072 {
1073 int maximum = NUM_FRAMERATE_CONTROLS - 1;
1074 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
1075 cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
1076 // Maximum 15fps
1077 int i;
1078 for(i=0; i<maximum; ++i) {
1079 if(framerate_controls[i].value ==
1080 CPIA2_VP_FRAMERATE_15)
1081 maximum = i;
1082 }
1083 }
1084 if(m->index < 0 || m->index > maximum)
1085 return -EINVAL;
1086
1087 strcpy(m->name, framerate_controls[m->index].name);
1088 break;
1089 }
1090 case CPIA2_CID_LIGHTS:
1091 if(m->index < 0 || m->index >= NUM_LIGHTS_CONTROLS)
1092 return -EINVAL;
1093
1094 strcpy(m->name, lights_controls[m->index].name);
1095 break;
1096 default:
1097 return -EINVAL;
1098 }
1099
1100 return 0;
1101 }
1102
1103 /******************************************************************************
1104 *
1105 * ioctl_g_ctrl
1106 *
1107 * V4L2 get the value of a control variable
1108 *
1109 *****************************************************************************/
1110
1111 static int ioctl_g_ctrl(void *arg,struct camera_data *cam)
1112 {
1113 struct v4l2_control *c = arg;
1114
1115 switch(c->id) {
1116 case V4L2_CID_BRIGHTNESS:
1117 cpia2_do_command(cam, CPIA2_CMD_GET_VP_BRIGHTNESS,
1118 TRANSFER_READ, 0);
1119 c->value = cam->params.color_params.brightness;
1120 break;
1121 case V4L2_CID_CONTRAST:
1122 cpia2_do_command(cam, CPIA2_CMD_GET_CONTRAST,
1123 TRANSFER_READ, 0);
1124 c->value = cam->params.color_params.contrast;
1125 break;
1126 case V4L2_CID_SATURATION:
1127 cpia2_do_command(cam, CPIA2_CMD_GET_VP_SATURATION,
1128 TRANSFER_READ, 0);
1129 c->value = cam->params.color_params.saturation;
1130 break;
1131 case V4L2_CID_HFLIP:
1132 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
1133 TRANSFER_READ, 0);
1134 c->value = (cam->params.vp_params.user_effects &
1135 CPIA2_VP_USER_EFFECTS_MIRROR) != 0;
1136 break;
1137 case V4L2_CID_VFLIP:
1138 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
1139 TRANSFER_READ, 0);
1140 c->value = (cam->params.vp_params.user_effects &
1141 CPIA2_VP_USER_EFFECTS_FLIP) != 0;
1142 break;
1143 case CPIA2_CID_TARGET_KB:
1144 c->value = cam->params.vc_params.target_kb;
1145 break;
1146 case CPIA2_CID_GPIO:
1147 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
1148 TRANSFER_READ, 0);
1149 c->value = cam->params.vp_params.gpio_data;
1150 break;
1151 case CPIA2_CID_FLICKER_MODE:
1152 {
1153 int i, mode;
1154 cpia2_do_command(cam, CPIA2_CMD_GET_FLICKER_MODES,
1155 TRANSFER_READ, 0);
1156 if(cam->params.flicker_control.cam_register &
1157 CPIA2_VP_FLICKER_MODES_NEVER_FLICKER) {
1158 mode = NEVER_FLICKER;
1159 } else {
1160 if(cam->params.flicker_control.cam_register &
1161 CPIA2_VP_FLICKER_MODES_50HZ) {
1162 mode = FLICKER_50;
1163 } else {
1164 mode = FLICKER_60;
1165 }
1166 }
1167 for(i=0; i<NUM_FLICKER_CONTROLS; i++) {
1168 if(flicker_controls[i].value == mode) {
1169 c->value = i;
1170 break;
1171 }
1172 }
1173 if(i == NUM_FLICKER_CONTROLS)
1174 return -EINVAL;
1175 break;
1176 }
1177 case CPIA2_CID_FRAMERATE:
1178 {
1179 int maximum = NUM_FRAMERATE_CONTROLS - 1;
1180 int i;
1181 for(i=0; i<= maximum; i++) {
1182 if(cam->params.vp_params.frame_rate ==
1183 framerate_controls[i].value)
1184 break;
1185 }
1186 if(i > maximum)
1187 return -EINVAL;
1188 c->value = i;
1189 break;
1190 }
1191 case CPIA2_CID_USB_ALT:
1192 c->value = cam->params.camera_state.stream_mode;
1193 break;
1194 case CPIA2_CID_LIGHTS:
1195 {
1196 int i;
1197 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
1198 TRANSFER_READ, 0);
1199 for(i=0; i<NUM_LIGHTS_CONTROLS; i++) {
1200 if((cam->params.vp_params.gpio_data&GPIO_LIGHTS_MASK) ==
1201 lights_controls[i].value) {
1202 break;
1203 }
1204 }
1205 if(i == NUM_LIGHTS_CONTROLS)
1206 return -EINVAL;
1207 c->value = i;
1208 break;
1209 }
1210 case CPIA2_CID_RESET_CAMERA:
1211 return -EINVAL;
1212 default:
1213 return -EINVAL;
1214 }
1215
1216 DBG("Get control id:%d, value:%d\n", c->id, c->value);
1217
1218 return 0;
1219 }
1220
1221 /******************************************************************************
1222 *
1223 * ioctl_s_ctrl
1224 *
1225 * V4L2 set the value of a control variable
1226 *
1227 *****************************************************************************/
1228
1229 static int ioctl_s_ctrl(void *arg,struct camera_data *cam)
1230 {
1231 struct v4l2_control *c = arg;
1232 int i;
1233 int retval = 0;
1234
1235 DBG("Set control id:%d, value:%d\n", c->id, c->value);
1236
1237 /* Check that the value is in range */
1238 for(i=0; i<NUM_CONTROLS; i++) {
1239 if(c->id == controls[i].id) {
1240 if(c->value < controls[i].minimum ||
1241 c->value > controls[i].maximum) {
1242 return -EINVAL;
1243 }
1244 break;
1245 }
1246 }
1247 if(i == NUM_CONTROLS)
1248 return -EINVAL;
1249
1250 switch(c->id) {
1251 case V4L2_CID_BRIGHTNESS:
1252 cpia2_set_brightness(cam, c->value);
1253 break;
1254 case V4L2_CID_CONTRAST:
1255 cpia2_set_contrast(cam, c->value);
1256 break;
1257 case V4L2_CID_SATURATION:
1258 cpia2_set_saturation(cam, c->value);
1259 break;
1260 case V4L2_CID_HFLIP:
1261 cpia2_set_property_mirror(cam, c->value);
1262 break;
1263 case V4L2_CID_VFLIP:
1264 cpia2_set_property_flip(cam, c->value);
1265 break;
1266 case CPIA2_CID_TARGET_KB:
1267 retval = cpia2_set_target_kb(cam, c->value);
1268 break;
1269 case CPIA2_CID_GPIO:
1270 retval = cpia2_set_gpio(cam, c->value);
1271 break;
1272 case CPIA2_CID_FLICKER_MODE:
1273 retval = cpia2_set_flicker_mode(cam,
1274 flicker_controls[c->value].value);
1275 break;
1276 case CPIA2_CID_FRAMERATE:
1277 retval = cpia2_set_fps(cam, framerate_controls[c->value].value);
1278 break;
1279 case CPIA2_CID_USB_ALT:
1280 retval = cpia2_usb_change_streaming_alternate(cam, c->value);
1281 break;
1282 case CPIA2_CID_LIGHTS:
1283 retval = cpia2_set_gpio(cam, lights_controls[c->value].value);
1284 break;
1285 case CPIA2_CID_RESET_CAMERA:
1286 cpia2_usb_stream_pause(cam);
1287 cpia2_reset_camera(cam);
1288 cpia2_usb_stream_resume(cam);
1289 break;
1290 default:
1291 retval = -EINVAL;
1292 }
1293
1294 return retval;
1295 }
1296
1297 /******************************************************************************
1298 *
1299 * ioctl_g_jpegcomp
1300 *
1301 * V4L2 get the JPEG compression parameters
1302 *
1303 *****************************************************************************/
1304
1305 static int ioctl_g_jpegcomp(void *arg,struct camera_data *cam)
1306 {
1307 struct v4l2_jpegcompression *parms = arg;
1308
1309 memset(parms, 0, sizeof(*parms));
1310
1311 parms->quality = 80; // TODO: Can this be made meaningful?
1312
1313 parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI;
1314 if(!cam->params.compression.inhibit_htables) {
1315 parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT;
1316 }
1317
1318 parms->APPn = cam->APPn;
1319 parms->APP_len = cam->APP_len;
1320 if(cam->APP_len > 0) {
1321 memcpy(parms->APP_data, cam->APP_data, cam->APP_len);
1322 parms->jpeg_markers |= V4L2_JPEG_MARKER_APP;
1323 }
1324
1325 parms->COM_len = cam->COM_len;
1326 if(cam->COM_len > 0) {
1327 memcpy(parms->COM_data, cam->COM_data, cam->COM_len);
1328 parms->jpeg_markers |= JPEG_MARKER_COM;
1329 }
1330
1331 DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n",
1332 parms->APP_len, parms->COM_len);
1333
1334 return 0;
1335 }
1336
1337 /******************************************************************************
1338 *
1339 * ioctl_s_jpegcomp
1340 *
1341 * V4L2 set the JPEG compression parameters
1342 * NOTE: quality and some jpeg_markers are ignored.
1343 *
1344 *****************************************************************************/
1345
1346 static int ioctl_s_jpegcomp(void *arg,struct camera_data *cam)
1347 {
1348 struct v4l2_jpegcompression *parms = arg;
1349
1350 DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n",
1351 parms->APP_len, parms->COM_len);
1352
1353 cam->params.compression.inhibit_htables =
1354 !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
1355
1356 if(parms->APP_len != 0) {
1357 if(parms->APP_len > 0 &&
1358 parms->APP_len <= sizeof(cam->APP_data) &&
1359 parms->APPn >= 0 && parms->APPn <= 15) {
1360 cam->APPn = parms->APPn;
1361 cam->APP_len = parms->APP_len;
1362 memcpy(cam->APP_data, parms->APP_data, parms->APP_len);
1363 } else {
1364 LOG("Bad APPn Params n=%d len=%d\n",
1365 parms->APPn, parms->APP_len);
1366 return -EINVAL;
1367 }
1368 } else {
1369 cam->APP_len = 0;
1370 }
1371
1372 if(parms->COM_len != 0) {
1373 if(parms->COM_len > 0 &&
1374 parms->COM_len <= sizeof(cam->COM_data)) {
1375 cam->COM_len = parms->COM_len;
1376 memcpy(cam->COM_data, parms->COM_data, parms->COM_len);
1377 } else {
1378 LOG("Bad COM_len=%d\n", parms->COM_len);
1379 return -EINVAL;
1380 }
1381 }
1382
1383 return 0;
1384 }
1385
1386 /******************************************************************************
1387 *
1388 * ioctl_reqbufs
1389 *
1390 * V4L2 Initiate memory mapping.
1391 * NOTE: The user's request is ignored. For now the buffers are fixed.
1392 *
1393 *****************************************************************************/
1394
1395 static int ioctl_reqbufs(void *arg,struct camera_data *cam)
1396 {
1397 struct v4l2_requestbuffers *req = arg;
1398
1399 if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1400 req->memory != V4L2_MEMORY_MMAP)
1401 return -EINVAL;
1402
1403 DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames);
1404 req->count = cam->num_frames;
1405 memset(&req->reserved, 0, sizeof(req->reserved));
1406
1407 return 0;
1408 }
1409
1410 /******************************************************************************
1411 *
1412 * ioctl_querybuf
1413 *
1414 * V4L2 Query memory buffer status.
1415 *
1416 *****************************************************************************/
1417
1418 static int ioctl_querybuf(void *arg,struct camera_data *cam)
1419 {
1420 struct v4l2_buffer *buf = arg;
1421
1422 if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1423 buf->index > cam->num_frames)
1424 return -EINVAL;
1425
1426 buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1427 buf->length = cam->frame_size;
1428
1429 buf->memory = V4L2_MEMORY_MMAP;
1430
1431 if(cam->mmapped)
1432 buf->flags = V4L2_BUF_FLAG_MAPPED;
1433 else
1434 buf->flags = 0;
1435
1436 switch (cam->buffers[buf->index].status) {
1437 case FRAME_EMPTY:
1438 case FRAME_ERROR:
1439 case FRAME_READING:
1440 buf->bytesused = 0;
1441 buf->flags = V4L2_BUF_FLAG_QUEUED;
1442 break;
1443 case FRAME_READY:
1444 buf->bytesused = cam->buffers[buf->index].length;
1445 buf->timestamp = cam->buffers[buf->index].timestamp;
1446 buf->sequence = cam->buffers[buf->index].seq;
1447 buf->flags = V4L2_BUF_FLAG_DONE;
1448 break;
1449 }
1450
1451 DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n",
1452 buf->index, buf->m.offset, buf->flags, buf->sequence,
1453 buf->bytesused);
1454
1455 return 0;
1456 }
1457
1458 /******************************************************************************
1459 *
1460 * ioctl_qbuf
1461 *
1462 * V4L2 User is freeing buffer
1463 *
1464 *****************************************************************************/
1465
1466 static int ioctl_qbuf(void *arg,struct camera_data *cam)
1467 {
1468 struct v4l2_buffer *buf = arg;
1469
1470 if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1471 buf->memory != V4L2_MEMORY_MMAP ||
1472 buf->index > cam->num_frames)
1473 return -EINVAL;
1474
1475 DBG("QBUF #%d\n", buf->index);
1476
1477 if(cam->buffers[buf->index].status == FRAME_READY)
1478 cam->buffers[buf->index].status = FRAME_EMPTY;
1479
1480 return 0;
1481 }
1482
1483 /******************************************************************************
1484 *
1485 * find_earliest_filled_buffer
1486 *
1487 * Helper for ioctl_dqbuf. Find the next ready buffer.
1488 *
1489 *****************************************************************************/
1490
1491 static int find_earliest_filled_buffer(struct camera_data *cam)
1492 {
1493 int i;
1494 int found = -1;
1495 for (i=0; i<cam->num_frames; i++) {
1496 if(cam->buffers[i].status == FRAME_READY) {
1497 if(found < 0) {
1498 found = i;
1499 } else {
1500 /* find which buffer is earlier */
1501 struct timeval *tv1, *tv2;
1502 tv1 = &cam->buffers[i].timestamp;
1503 tv2 = &cam->buffers[found].timestamp;
1504 if(tv1->tv_sec < tv2->tv_sec ||
1505 (tv1->tv_sec == tv2->tv_sec &&
1506 tv1->tv_usec < tv2->tv_usec))
1507 found = i;
1508 }
1509 }
1510 }
1511 return found;
1512 }
1513
1514 /******************************************************************************
1515 *
1516 * ioctl_dqbuf
1517 *
1518 * V4L2 User is asking for a filled buffer.
1519 *
1520 *****************************************************************************/
1521
1522 static int ioctl_dqbuf(void *arg,struct camera_data *cam, struct file *file)
1523 {
1524 struct v4l2_buffer *buf = arg;
1525 int frame;
1526
1527 if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1528 buf->memory != V4L2_MEMORY_MMAP)
1529 return -EINVAL;
1530
1531 frame = find_earliest_filled_buffer(cam);
1532
1533 if(frame < 0 && file->f_flags&O_NONBLOCK)
1534 return -EAGAIN;
1535
1536 if(frame < 0) {
1537 /* Wait for a frame to become available */
1538 struct framebuf *cb=cam->curbuff;
1539 mutex_unlock(&cam->busy_lock);
1540 wait_event_interruptible(cam->wq_stream,
1541 !cam->present ||
1542 (cb=cam->curbuff)->status == FRAME_READY);
1543 mutex_lock(&cam->busy_lock);
1544 if (signal_pending(current))
1545 return -ERESTARTSYS;
1546 if(!cam->present)
1547 return -ENOTTY;
1548 frame = cb->num;
1549 }
1550
1551
1552 buf->index = frame;
1553 buf->bytesused = cam->buffers[buf->index].length;
1554 buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE;
1555 buf->field = V4L2_FIELD_NONE;
1556 buf->timestamp = cam->buffers[buf->index].timestamp;
1557 buf->sequence = cam->buffers[buf->index].seq;
1558 buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1559 buf->length = cam->frame_size;
1560 buf->input = 0;
1561 buf->reserved = 0;
1562 memset(&buf->timecode, 0, sizeof(buf->timecode));
1563
1564 DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index,
1565 cam->buffers[buf->index].status, buf->sequence, buf->bytesused);
1566
1567 return 0;
1568 }
1569
1570 /******************************************************************************
1571 *
1572 * cpia2_ioctl
1573 *
1574 *****************************************************************************/
1575 static long cpia2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
1576 {
1577 struct camera_data *cam = video_drvdata(file);
1578 long retval = 0;
1579
1580 if (!cam)
1581 return -ENOTTY;
1582
1583 /* make this _really_ smp-safe */
1584 if (mutex_lock_interruptible(&cam->busy_lock))
1585 return -ERESTARTSYS;
1586
1587 if (!cam->present) {
1588 mutex_unlock(&cam->busy_lock);
1589 return -ENODEV;
1590 }
1591
1592 /* Priority check */
1593 switch (cmd) {
1594 case VIDIOCSWIN:
1595 case VIDIOCMCAPTURE:
1596 case VIDIOC_S_FMT:
1597 {
1598 struct cpia2_fh *fh = file->private_data;
1599 retval = v4l2_prio_check(&cam->prio, &fh->prio);
1600 if(retval) {
1601 mutex_unlock(&cam->busy_lock);
1602 return retval;
1603 }
1604 break;
1605 }
1606 case VIDIOCGMBUF:
1607 case VIDIOCSYNC:
1608 {
1609 struct cpia2_fh *fh = file->private_data;
1610 if(fh->prio != V4L2_PRIORITY_RECORD) {
1611 mutex_unlock(&cam->busy_lock);
1612 return -EBUSY;
1613 }
1614 break;
1615 }
1616 default:
1617 break;
1618 }
1619
1620 switch (cmd) {
1621 case VIDIOCGCAP: /* query capabilities */
1622 retval = ioctl_cap_query(arg, cam);
1623 break;
1624
1625 case VIDIOCGCHAN: /* get video source - we are a camera, nothing else */
1626 retval = ioctl_get_channel(arg);
1627 break;
1628 case VIDIOCSCHAN: /* set video source - we are a camera, nothing else */
1629 retval = ioctl_set_channel(arg);
1630 break;
1631 case VIDIOCGPICT: /* image properties */
1632 memcpy(arg, &cam->vp, sizeof(struct video_picture));
1633 break;
1634 case VIDIOCSPICT:
1635 retval = ioctl_set_image_prop(arg, cam);
1636 break;
1637 case VIDIOCGWIN: /* get/set capture window */
1638 memcpy(arg, &cam->vw, sizeof(struct video_window));
1639 break;
1640 case VIDIOCSWIN:
1641 retval = ioctl_set_window_size(arg, cam, file->private_data);
1642 break;
1643 case VIDIOCGMBUF: /* mmap interface */
1644 retval = ioctl_get_mbuf(arg, cam);
1645 break;
1646 case VIDIOCMCAPTURE:
1647 retval = ioctl_mcapture(arg, cam, file->private_data);
1648 break;
1649 case VIDIOCSYNC:
1650 retval = ioctl_sync(arg, cam);
1651 break;
1652 /* pointless to implement overlay with this camera */
1653 case VIDIOCCAPTURE:
1654 case VIDIOCGFBUF:
1655 case VIDIOCSFBUF:
1656 case VIDIOCKEY:
1657 retval = -EINVAL;
1658 break;
1659
1660 /* tuner interface - we have none */
1661 case VIDIOCGTUNER:
1662 case VIDIOCSTUNER:
1663 case VIDIOCGFREQ:
1664 case VIDIOCSFREQ:
1665 retval = -EINVAL;
1666 break;
1667
1668 /* audio interface - we have none */
1669 case VIDIOCGAUDIO:
1670 case VIDIOCSAUDIO:
1671 retval = -EINVAL;
1672 break;
1673
1674 /* CPIA2 extension to Video4Linux API */
1675 case CPIA2_IOC_SET_GPIO:
1676 retval = ioctl_set_gpio(arg, cam);
1677 break;
1678 case VIDIOC_QUERYCAP:
1679 retval = ioctl_querycap(arg,cam);
1680 break;
1681
1682 case VIDIOC_ENUMINPUT:
1683 case VIDIOC_G_INPUT:
1684 case VIDIOC_S_INPUT:
1685 retval = ioctl_input(cmd, arg, cam);
1686 break;
1687
1688 case VIDIOC_ENUM_FMT:
1689 retval = ioctl_enum_fmt(arg,cam);
1690 break;
1691 case VIDIOC_TRY_FMT:
1692 retval = ioctl_try_fmt(arg,cam);
1693 break;
1694 case VIDIOC_G_FMT:
1695 retval = ioctl_get_fmt(arg,cam);
1696 break;
1697 case VIDIOC_S_FMT:
1698 retval = ioctl_set_fmt(arg,cam,file->private_data);
1699 break;
1700
1701 case VIDIOC_CROPCAP:
1702 retval = ioctl_cropcap(arg,cam);
1703 break;
1704 case VIDIOC_G_CROP:
1705 case VIDIOC_S_CROP:
1706 // TODO: I think cropping can be implemented - SJB
1707 retval = -EINVAL;
1708 break;
1709
1710 case VIDIOC_QUERYCTRL:
1711 retval = ioctl_queryctrl(arg,cam);
1712 break;
1713 case VIDIOC_QUERYMENU:
1714 retval = ioctl_querymenu(arg,cam);
1715 break;
1716 case VIDIOC_G_CTRL:
1717 retval = ioctl_g_ctrl(arg,cam);
1718 break;
1719 case VIDIOC_S_CTRL:
1720 retval = ioctl_s_ctrl(arg,cam);
1721 break;
1722
1723 case VIDIOC_G_JPEGCOMP:
1724 retval = ioctl_g_jpegcomp(arg,cam);
1725 break;
1726 case VIDIOC_S_JPEGCOMP:
1727 retval = ioctl_s_jpegcomp(arg,cam);
1728 break;
1729
1730 case VIDIOC_G_PRIORITY:
1731 {
1732 struct cpia2_fh *fh = file->private_data;
1733 *(enum v4l2_priority*)arg = fh->prio;
1734 break;
1735 }
1736 case VIDIOC_S_PRIORITY:
1737 {
1738 struct cpia2_fh *fh = file->private_data;
1739 enum v4l2_priority prio;
1740 prio = *(enum v4l2_priority*)arg;
1741 if(cam->streaming &&
1742 prio != fh->prio &&
1743 fh->prio == V4L2_PRIORITY_RECORD) {
1744 /* Can't drop record priority while streaming */
1745 retval = -EBUSY;
1746 } else if(prio == V4L2_PRIORITY_RECORD &&
1747 prio != fh->prio &&
1748 v4l2_prio_max(&cam->prio) == V4L2_PRIORITY_RECORD) {
1749 /* Only one program can record at a time */
1750 retval = -EBUSY;
1751 } else {
1752 retval = v4l2_prio_change(&cam->prio, &fh->prio, prio);
1753 }
1754 break;
1755 }
1756
1757 case VIDIOC_REQBUFS:
1758 retval = ioctl_reqbufs(arg,cam);
1759 break;
1760 case VIDIOC_QUERYBUF:
1761 retval = ioctl_querybuf(arg,cam);
1762 break;
1763 case VIDIOC_QBUF:
1764 retval = ioctl_qbuf(arg,cam);
1765 break;
1766 case VIDIOC_DQBUF:
1767 retval = ioctl_dqbuf(arg,cam,file);
1768 break;
1769 case VIDIOC_STREAMON:
1770 {
1771 int type;
1772 DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming);
1773 type = *(int*)arg;
1774 if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1775 retval = -EINVAL;
1776
1777 if(!cam->streaming) {
1778 retval = cpia2_usb_stream_start(cam,
1779 cam->params.camera_state.stream_mode);
1780 } else {
1781 retval = -EINVAL;
1782 }
1783
1784 break;
1785 }
1786 case VIDIOC_STREAMOFF:
1787 {
1788 int type;
1789 DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming);
1790 type = *(int*)arg;
1791 if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1792 retval = -EINVAL;
1793
1794 if(cam->streaming) {
1795 retval = cpia2_usb_stream_stop(cam);
1796 } else {
1797 retval = -EINVAL;
1798 }
1799
1800 break;
1801 }
1802
1803 case VIDIOC_ENUMOUTPUT:
1804 case VIDIOC_G_OUTPUT:
1805 case VIDIOC_S_OUTPUT:
1806 case VIDIOC_G_MODULATOR:
1807 case VIDIOC_S_MODULATOR:
1808
1809 case VIDIOC_ENUMAUDIO:
1810 case VIDIOC_G_AUDIO:
1811 case VIDIOC_S_AUDIO:
1812
1813 case VIDIOC_ENUMAUDOUT:
1814 case VIDIOC_G_AUDOUT:
1815 case VIDIOC_S_AUDOUT:
1816
1817 case VIDIOC_ENUMSTD:
1818 case VIDIOC_QUERYSTD:
1819 case VIDIOC_G_STD:
1820 case VIDIOC_S_STD:
1821
1822 case VIDIOC_G_TUNER:
1823 case VIDIOC_S_TUNER:
1824 case VIDIOC_G_FREQUENCY:
1825 case VIDIOC_S_FREQUENCY:
1826
1827 case VIDIOC_OVERLAY:
1828 case VIDIOC_G_FBUF:
1829 case VIDIOC_S_FBUF:
1830
1831 case VIDIOC_G_PARM:
1832 case VIDIOC_S_PARM:
1833 retval = -EINVAL;
1834 break;
1835 default:
1836 retval = -ENOIOCTLCMD;
1837 break;
1838 }
1839
1840 mutex_unlock(&cam->busy_lock);
1841 return retval;
1842 }
1843
1844 static long cpia2_ioctl(struct file *file,
1845 unsigned int cmd, unsigned long arg)
1846 {
1847 return video_usercopy(file, cmd, arg, cpia2_do_ioctl);
1848 }
1849
1850 /******************************************************************************
1851 *
1852 * cpia2_mmap
1853 *
1854 *****************************************************************************/
1855 static int cpia2_mmap(struct file *file, struct vm_area_struct *area)
1856 {
1857 struct camera_data *cam = video_drvdata(file);
1858 int retval;
1859
1860 /* Priority check */
1861 struct cpia2_fh *fh = file->private_data;
1862 if(fh->prio != V4L2_PRIORITY_RECORD) {
1863 return -EBUSY;
1864 }
1865
1866 retval = cpia2_remap_buffer(cam, area);
1867
1868 if(!retval)
1869 fh->mmapped = 1;
1870 return retval;
1871 }
1872
1873 /******************************************************************************
1874 *
1875 * reset_camera_struct_v4l
1876 *
1877 * Sets all values to the defaults
1878 *****************************************************************************/
1879 static void reset_camera_struct_v4l(struct camera_data *cam)
1880 {
1881 /***
1882 * Fill in the v4l structures. video_cap is filled in inside the VIDIOCCAP
1883 * Ioctl. Here, just do the window and picture stucts.
1884 ***/
1885 cam->vp.palette = (u16) VIDEO_PALETTE_RGB24; /* Is this right? */
1886 cam->vp.brightness = (u16) cam->params.color_params.brightness * 256;
1887 cam->vp.colour = (u16) cam->params.color_params.saturation * 256;
1888 cam->vp.contrast = (u16) cam->params.color_params.contrast * 256;
1889
1890 cam->vw.x = 0;
1891 cam->vw.y = 0;
1892 cam->vw.width = cam->params.roi.width;
1893 cam->vw.height = cam->params.roi.height;
1894 cam->vw.flags = 0;
1895 cam->vw.clipcount = 0;
1896
1897 cam->frame_size = buffer_size;
1898 cam->num_frames = num_buffers;
1899
1900 /* FlickerModes */
1901 cam->params.flicker_control.flicker_mode_req = flicker_mode;
1902 cam->params.flicker_control.mains_frequency = flicker_freq;
1903
1904 /* streamMode */
1905 cam->params.camera_state.stream_mode = alternate;
1906
1907 cam->pixelformat = V4L2_PIX_FMT_JPEG;
1908 v4l2_prio_init(&cam->prio);
1909 return;
1910 }
1911
1912 /***
1913 * The v4l video device structure initialized for this device
1914 ***/
1915 static const struct v4l2_file_operations fops_template = {
1916 .owner = THIS_MODULE,
1917 .open = cpia2_open,
1918 .release = cpia2_close,
1919 .read = cpia2_v4l_read,
1920 .poll = cpia2_v4l_poll,
1921 .ioctl = cpia2_ioctl,
1922 .mmap = cpia2_mmap,
1923 };
1924
1925 static struct video_device cpia2_template = {
1926 /* I could not find any place for the old .initialize initializer?? */
1927 .name= "CPiA2 Camera",
1928 .minor= -1,
1929 .fops= &fops_template,
1930 .release= video_device_release,
1931 };
1932
1933 /******************************************************************************
1934 *
1935 * cpia2_register_camera
1936 *
1937 *****************************************************************************/
1938 int cpia2_register_camera(struct camera_data *cam)
1939 {
1940 cam->vdev = video_device_alloc();
1941 if(!cam->vdev)
1942 return -ENOMEM;
1943
1944 memcpy(cam->vdev, &cpia2_template, sizeof(cpia2_template));
1945 video_set_drvdata(cam->vdev, cam);
1946
1947 reset_camera_struct_v4l(cam);
1948
1949 /* register v4l device */
1950 if (video_register_device(cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
1951 ERR("video_register_device failed\n");
1952 video_device_release(cam->vdev);
1953 return -ENODEV;
1954 }
1955
1956 return 0;
1957 }
1958
1959 /******************************************************************************
1960 *
1961 * cpia2_unregister_camera
1962 *
1963 *****************************************************************************/
1964 void cpia2_unregister_camera(struct camera_data *cam)
1965 {
1966 if (!cam->open_count) {
1967 video_unregister_device(cam->vdev);
1968 } else {
1969 LOG("/dev/video%d removed while open, "
1970 "deferring video_unregister_device\n",
1971 cam->vdev->num);
1972 }
1973 }
1974
1975 /******************************************************************************
1976 *
1977 * check_parameters
1978 *
1979 * Make sure that all user-supplied parameters are sensible
1980 *****************************************************************************/
1981 static void __init check_parameters(void)
1982 {
1983 if(buffer_size < PAGE_SIZE) {
1984 buffer_size = PAGE_SIZE;
1985 LOG("buffer_size too small, setting to %d\n", buffer_size);
1986 } else if(buffer_size > 1024*1024) {
1987 /* arbitrary upper limiit */
1988 buffer_size = 1024*1024;
1989 LOG("buffer_size ridiculously large, setting to %d\n",
1990 buffer_size);
1991 } else {
1992 buffer_size += PAGE_SIZE-1;
1993 buffer_size &= ~(PAGE_SIZE-1);
1994 }
1995
1996 if(num_buffers < 1) {
1997 num_buffers = 1;
1998 LOG("num_buffers too small, setting to %d\n", num_buffers);
1999 } else if(num_buffers > VIDEO_MAX_FRAME) {
2000 num_buffers = VIDEO_MAX_FRAME;
2001 LOG("num_buffers too large, setting to %d\n", num_buffers);
2002 }
2003
2004 if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) {
2005 alternate = DEFAULT_ALT;
2006 LOG("alternate specified is invalid, using %d\n", alternate);
2007 }
2008
2009 if (flicker_mode != NEVER_FLICKER && flicker_mode != ANTI_FLICKER_ON) {
2010 flicker_mode = NEVER_FLICKER;
2011 LOG("Flicker mode specified is invalid, using %d\n",
2012 flicker_mode);
2013 }
2014
2015 if (flicker_freq != FLICKER_50 && flicker_freq != FLICKER_60) {
2016 flicker_freq = FLICKER_60;
2017 LOG("Flicker mode specified is invalid, using %d\n",
2018 flicker_freq);
2019 }
2020
2021 if(video_nr < -1 || video_nr > 64) {
2022 video_nr = -1;
2023 LOG("invalid video_nr specified, must be -1 to 64\n");
2024 }
2025
2026 DBG("Using %d buffers, each %d bytes, alternate=%d\n",
2027 num_buffers, buffer_size, alternate);
2028 }
2029
2030 /************ Module Stuff ***************/
2031
2032
2033 /******************************************************************************
2034 *
2035 * cpia2_init/module_init
2036 *
2037 *****************************************************************************/
2038 static int __init cpia2_init(void)
2039 {
2040 LOG("%s v%d.%d.%d\n",
2041 ABOUT, CPIA2_MAJ_VER, CPIA2_MIN_VER, CPIA2_PATCH_VER);
2042 check_parameters();
2043 cpia2_usb_init();
2044 return 0;
2045 }
2046
2047
2048 /******************************************************************************
2049 *
2050 * cpia2_exit/module_exit
2051 *
2052 *****************************************************************************/
2053 static void __exit cpia2_exit(void)
2054 {
2055 cpia2_usb_cleanup();
2056 schedule_timeout(2 * HZ);
2057 }
2058
2059 module_init(cpia2_init);
2060 module_exit(cpia2_exit);
2061
(Inofficial) Linux kernel tree running on the Nao robot