eb9f15cd4c45c9884170fb9599e99f6544e4e288
[linux-2.6.git] / drivers / media / video / 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@redhat.com>
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 inode *inode, struct file *file)
243 {
244         struct video_device *dev = video_devdata(file);
245         struct camera_data *cam = video_get_drvdata(dev);
246         int retval = 0;
247
248         if (!cam) {
249                 ERR("Internal error, camera_data not found!\n");
250                 return -ENODEV;
251         }
252
253         if(mutex_lock_interruptible(&cam->busy_lock))
254                 return -ERESTARTSYS;
255
256         if(!cam->present) {
257                 retval = -ENODEV;
258                 goto err_return;
259         }
260
261         if (cam->open_count > 0) {
262                 goto skip_init;
263         }
264
265         if (cpia2_allocate_buffers(cam)) {
266                 retval = -ENOMEM;
267                 goto err_return;
268         }
269
270         /* reset the camera */
271         if (cpia2_reset_camera(cam) < 0) {
272                 retval = -EIO;
273                 goto err_return;
274         }
275
276         cam->APP_len = 0;
277         cam->COM_len = 0;
278
279 skip_init:
280         {
281                 struct cpia2_fh *fh = kmalloc(sizeof(*fh),GFP_KERNEL);
282                 if(!fh) {
283                         retval = -ENOMEM;
284                         goto err_return;
285                 }
286                 file->private_data = fh;
287                 fh->prio = V4L2_PRIORITY_UNSET;
288                 v4l2_prio_open(&cam->prio, &fh->prio);
289                 fh->mmapped = 0;
290         }
291
292         ++cam->open_count;
293
294         cpia2_dbg_dump_registers(cam);
295
296 err_return:
297         mutex_unlock(&cam->busy_lock);
298         return retval;
299 }
300
301 /******************************************************************************
302  *
303  *  cpia2_close
304  *
305  *****************************************************************************/
306 static int cpia2_close(struct inode *inode, struct file *file)
307 {
308         struct video_device *dev = video_devdata(file);
309         struct camera_data *cam = video_get_drvdata(dev);
310         struct cpia2_fh *fh = file->private_data;
311
312         mutex_lock(&cam->busy_lock);
313
314         if (cam->present &&
315             (cam->open_count == 1
316              || fh->prio == V4L2_PRIORITY_RECORD
317             )) {
318                 cpia2_usb_stream_stop(cam);
319
320                 if(cam->open_count == 1) {
321                         /* save camera state for later open */
322                         cpia2_save_camera_state(cam);
323
324                         cpia2_set_low_power(cam);
325                         cpia2_free_buffers(cam);
326                 }
327         }
328
329         {
330                 if(fh->mmapped)
331                         cam->mmapped = 0;
332                 v4l2_prio_close(&cam->prio,&fh->prio);
333                 file->private_data = NULL;
334                 kfree(fh);
335         }
336
337         if (--cam->open_count == 0) {
338                 cpia2_free_buffers(cam);
339                 if (!cam->present) {
340                         video_unregister_device(dev);
341                         mutex_unlock(&cam->busy_lock);
342                         kfree(cam);
343                         return 0;
344                 }
345         }
346
347         mutex_unlock(&cam->busy_lock);
348
349         return 0;
350 }
351
352 /******************************************************************************
353  *
354  *  cpia2_v4l_read
355  *
356  *****************************************************************************/
357 static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count,
358                               loff_t *off)
359 {
360         struct video_device *dev = video_devdata(file);
361         struct camera_data *cam = video_get_drvdata(dev);
362         int noblock = file->f_flags&O_NONBLOCK;
363
364         struct cpia2_fh *fh = file->private_data;
365
366         if(!cam)
367                 return -EINVAL;
368
369         /* Priority check */
370         if(fh->prio != V4L2_PRIORITY_RECORD) {
371                 return -EBUSY;
372         }
373
374         return cpia2_read(cam, buf, count, noblock);
375 }
376
377
378 /******************************************************************************
379  *
380  *  cpia2_v4l_poll
381  *
382  *****************************************************************************/
383 static unsigned int cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait)
384 {
385         struct video_device *dev = video_devdata(filp);
386         struct camera_data *cam = video_get_drvdata(dev);
387
388         struct cpia2_fh *fh = filp->private_data;
389
390         if(!cam)
391                 return POLLERR;
392
393         /* Priority check */
394         if(fh->prio != V4L2_PRIORITY_RECORD) {
395                 return POLLERR;
396         }
397
398         return cpia2_poll(cam, filp, wait);
399 }
400
401
402 /******************************************************************************
403  *
404  *  ioctl_cap_query
405  *
406  *****************************************************************************/
407 static int ioctl_cap_query(void *arg, struct camera_data *cam)
408 {
409         struct video_capability *vc;
410         int retval = 0;
411         vc = arg;
412
413         if (cam->params.pnp_id.product == 0x151)
414                 strcpy(vc->name, "QX5 Microscope");
415         else
416                 strcpy(vc->name, "CPiA2 Camera");
417
418         vc->type = VID_TYPE_CAPTURE | VID_TYPE_MJPEG_ENCODER;
419         vc->channels = 1;
420         vc->audios = 0;
421         vc->minwidth = 176;     /* VIDEOSIZE_QCIF */
422         vc->minheight = 144;
423         switch (cam->params.version.sensor_flags) {
424         case CPIA2_VP_SENSOR_FLAGS_500:
425                 vc->maxwidth = STV_IMAGE_VGA_COLS;
426                 vc->maxheight = STV_IMAGE_VGA_ROWS;
427                 break;
428         case CPIA2_VP_SENSOR_FLAGS_410:
429                 vc->maxwidth = STV_IMAGE_CIF_COLS;
430                 vc->maxheight = STV_IMAGE_CIF_ROWS;
431                 break;
432         default:
433                 return -EINVAL;
434         }
435
436         return retval;
437 }
438
439 /******************************************************************************
440  *
441  *  ioctl_get_channel
442  *
443  *****************************************************************************/
444 static int ioctl_get_channel(void *arg)
445 {
446         int retval = 0;
447         struct video_channel *v;
448         v = arg;
449
450         if (v->channel != 0)
451                 return -EINVAL;
452
453         v->channel = 0;
454         strcpy(v->name, "Camera");
455         v->tuners = 0;
456         v->flags = 0;
457         v->type = VIDEO_TYPE_CAMERA;
458         v->norm = 0;
459
460         return retval;
461 }
462
463 /******************************************************************************
464  *
465  *  ioctl_set_channel
466  *
467  *****************************************************************************/
468 static int ioctl_set_channel(void *arg)
469 {
470         struct video_channel *v;
471         int retval = 0;
472         v = arg;
473
474         if (retval == 0 && v->channel != 0)
475                 retval = -EINVAL;
476
477         return retval;
478 }
479
480 /******************************************************************************
481  *
482  *  ioctl_set_image_prop
483  *
484  *****************************************************************************/
485 static int ioctl_set_image_prop(void *arg, struct camera_data *cam)
486 {
487         struct video_picture *vp;
488         int retval = 0;
489         vp = arg;
490
491         /* brightness, color, contrast need no check 0-65535 */
492         memcpy(&cam->vp, vp, sizeof(*vp));
493
494         /* update cam->params.colorParams */
495         cam->params.color_params.brightness = vp->brightness / 256;
496         cam->params.color_params.saturation = vp->colour / 256;
497         cam->params.color_params.contrast = vp->contrast / 256;
498
499         DBG("Requested params: bright 0x%X, sat 0x%X, contrast 0x%X\n",
500             cam->params.color_params.brightness,
501             cam->params.color_params.saturation,
502             cam->params.color_params.contrast);
503
504         cpia2_set_color_params(cam);
505
506         return retval;
507 }
508
509 static int sync(struct camera_data *cam, int frame_nr)
510 {
511         struct framebuf *frame = &cam->buffers[frame_nr];
512
513         while (1) {
514                 if (frame->status == FRAME_READY)
515                         return 0;
516
517                 if (!cam->streaming) {
518                         frame->status = FRAME_READY;
519                         frame->length = 0;
520                         return 0;
521                 }
522
523                 mutex_unlock(&cam->busy_lock);
524                 wait_event_interruptible(cam->wq_stream,
525                                          !cam->streaming ||
526                                          frame->status == FRAME_READY);
527                 mutex_lock(&cam->busy_lock);
528                 if (signal_pending(current))
529                         return -ERESTARTSYS;
530                 if(!cam->present)
531                         return -ENOTTY;
532         }
533 }
534
535 /******************************************************************************
536  *
537  *  ioctl_set_window_size
538  *
539  *****************************************************************************/
540 static int ioctl_set_window_size(void *arg, struct camera_data *cam,
541                                  struct cpia2_fh *fh)
542 {
543         /* copy_from_user, check validity, copy to internal structure */
544         struct video_window *vw;
545         int frame, err;
546         vw = arg;
547
548         if (vw->clipcount != 0) /* clipping not supported */
549                 return -EINVAL;
550
551         if (vw->clips != NULL)  /* clipping not supported */
552                 return -EINVAL;
553
554         /* Ensure that only this process can change the format. */
555         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
556         if(err != 0)
557                 return err;
558
559         cam->pixelformat = V4L2_PIX_FMT_JPEG;
560
561         /* Be sure to supply the Huffman tables, this isn't MJPEG */
562         cam->params.compression.inhibit_htables = 0;
563
564         /* we set the video window to something smaller or equal to what
565          * is requested by the user???
566          */
567         DBG("Requested width = %d, height = %d\n", vw->width, vw->height);
568         if (vw->width != cam->vw.width || vw->height != cam->vw.height) {
569                 cam->vw.width = vw->width;
570                 cam->vw.height = vw->height;
571                 cam->params.roi.width = vw->width;
572                 cam->params.roi.height = vw->height;
573                 cpia2_set_format(cam);
574         }
575
576         for (frame = 0; frame < cam->num_frames; ++frame) {
577                 if (cam->buffers[frame].status == FRAME_READING)
578                         if ((err = sync(cam, frame)) < 0)
579                                 return err;
580
581                 cam->buffers[frame].status = FRAME_EMPTY;
582         }
583
584         return 0;
585 }
586
587 /******************************************************************************
588  *
589  *  ioctl_get_mbuf
590  *
591  *****************************************************************************/
592 static int ioctl_get_mbuf(void *arg, struct camera_data *cam)
593 {
594         struct video_mbuf *vm;
595         int i;
596         vm = arg;
597
598         memset(vm, 0, sizeof(*vm));
599         vm->size = cam->frame_size*cam->num_frames;
600         vm->frames = cam->num_frames;
601         for (i = 0; i < cam->num_frames; i++)
602                 vm->offsets[i] = cam->frame_size * i;
603
604         return 0;
605 }
606
607 /******************************************************************************
608  *
609  *  ioctl_mcapture
610  *
611  *****************************************************************************/
612 static int ioctl_mcapture(void *arg, struct camera_data *cam,
613                           struct cpia2_fh *fh)
614 {
615         struct video_mmap *vm;
616         int video_size, err;
617         vm = arg;
618
619         if (vm->frame < 0 || vm->frame >= cam->num_frames)
620                 return -EINVAL;
621
622         /* set video size */
623         video_size = cpia2_match_video_size(vm->width, vm->height);
624         if (cam->video_size < 0) {
625                 return -EINVAL;
626         }
627
628         /* Ensure that only this process can change the format. */
629         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
630         if(err != 0)
631                 return err;
632
633         if (video_size != cam->video_size) {
634                 cam->video_size = video_size;
635                 cam->params.roi.width = vm->width;
636                 cam->params.roi.height = vm->height;
637                 cpia2_set_format(cam);
638         }
639
640         if (cam->buffers[vm->frame].status == FRAME_READING)
641                 if ((err=sync(cam, vm->frame)) < 0)
642                         return err;
643
644         cam->buffers[vm->frame].status = FRAME_EMPTY;
645
646         return cpia2_usb_stream_start(cam,cam->params.camera_state.stream_mode);
647 }
648
649 /******************************************************************************
650  *
651  *  ioctl_sync
652  *
653  *****************************************************************************/
654 static int ioctl_sync(void *arg, struct camera_data *cam)
655 {
656         int frame;
657
658         frame = *(int*)arg;
659
660         if (frame < 0 || frame >= cam->num_frames)
661                 return -EINVAL;
662
663         return sync(cam, frame);
664 }
665
666
667 /******************************************************************************
668  *
669  *  ioctl_set_gpio
670  *
671  *****************************************************************************/
672
673 static int ioctl_set_gpio(void *arg, struct camera_data *cam)
674 {
675         __u32 gpio_val;
676
677         gpio_val = *(__u32*) arg;
678
679         if (gpio_val &~ 0xFFU)
680                 return -EINVAL;
681
682         return cpia2_set_gpio(cam, (unsigned char)gpio_val);
683 }
684
685 /******************************************************************************
686  *
687  *  ioctl_querycap
688  *
689  *  V4L2 device capabilities
690  *
691  *****************************************************************************/
692
693 static int ioctl_querycap(void *arg, struct camera_data *cam)
694 {
695         struct v4l2_capability *vc = arg;
696
697         memset(vc, 0, sizeof(*vc));
698         strcpy(vc->driver, "cpia2");
699
700         if (cam->params.pnp_id.product == 0x151)
701                 strcpy(vc->card, "QX5 Microscope");
702         else
703                 strcpy(vc->card, "CPiA2 Camera");
704         switch (cam->params.pnp_id.device_type) {
705         case DEVICE_STV_672:
706                 strcat(vc->card, " (672/");
707                 break;
708         case DEVICE_STV_676:
709                 strcat(vc->card, " (676/");
710                 break;
711         default:
712                 strcat(vc->card, " (???/");
713                 break;
714         }
715         switch (cam->params.version.sensor_flags) {
716         case CPIA2_VP_SENSOR_FLAGS_404:
717                 strcat(vc->card, "404)");
718                 break;
719         case CPIA2_VP_SENSOR_FLAGS_407:
720                 strcat(vc->card, "407)");
721                 break;
722         case CPIA2_VP_SENSOR_FLAGS_409:
723                 strcat(vc->card, "409)");
724                 break;
725         case CPIA2_VP_SENSOR_FLAGS_410:
726                 strcat(vc->card, "410)");
727                 break;
728         case CPIA2_VP_SENSOR_FLAGS_500:
729                 strcat(vc->card, "500)");
730                 break;
731         default:
732                 strcat(vc->card, "???)");
733                 break;
734         }
735
736         if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0)
737                 memset(vc->bus_info,0, sizeof(vc->bus_info));
738
739         vc->version = KERNEL_VERSION(CPIA2_MAJ_VER, CPIA2_MIN_VER,
740                                      CPIA2_PATCH_VER);
741
742         vc->capabilities = V4L2_CAP_VIDEO_CAPTURE |
743                            V4L2_CAP_READWRITE |
744                            V4L2_CAP_STREAMING;
745
746         return 0;
747 }
748
749 /******************************************************************************
750  *
751  *  ioctl_input
752  *
753  *  V4L2 input get/set/enumerate
754  *
755  *****************************************************************************/
756
757 static int ioctl_input(unsigned int ioclt_nr,void *arg,struct camera_data *cam)
758 {
759         struct v4l2_input *i = arg;
760
761         if(ioclt_nr  != VIDIOC_G_INPUT) {
762                 if (i->index != 0)
763                        return -EINVAL;
764         }
765
766         memset(i, 0, sizeof(*i));
767         strcpy(i->name, "Camera");
768         i->type = V4L2_INPUT_TYPE_CAMERA;
769
770         return 0;
771 }
772
773 /******************************************************************************
774  *
775  *  ioctl_enum_fmt
776  *
777  *  V4L2 format enumerate
778  *
779  *****************************************************************************/
780
781 static int ioctl_enum_fmt(void *arg,struct camera_data *cam)
782 {
783         struct v4l2_fmtdesc *f = arg;
784         int index = f->index;
785
786         if (index < 0 || index > 1)
787                return -EINVAL;
788
789         memset(f, 0, sizeof(*f));
790         f->index = index;
791         f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
792         f->flags = V4L2_FMT_FLAG_COMPRESSED;
793         switch(index) {
794         case 0:
795                 strcpy(f->description, "MJPEG");
796                 f->pixelformat = V4L2_PIX_FMT_MJPEG;
797                 break;
798         case 1:
799                 strcpy(f->description, "JPEG");
800                 f->pixelformat = V4L2_PIX_FMT_JPEG;
801                 break;
802         default:
803                 return -EINVAL;
804         }
805
806         return 0;
807 }
808
809 /******************************************************************************
810  *
811  *  ioctl_try_fmt
812  *
813  *  V4L2 format try
814  *
815  *****************************************************************************/
816
817 static int ioctl_try_fmt(void *arg,struct camera_data *cam)
818 {
819         struct v4l2_format *f = arg;
820
821         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
822                return -EINVAL;
823
824         if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG &&
825             f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
826                return -EINVAL;
827
828         f->fmt.pix.field = V4L2_FIELD_NONE;
829         f->fmt.pix.bytesperline = 0;
830         f->fmt.pix.sizeimage = cam->frame_size;
831         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
832         f->fmt.pix.priv = 0;
833
834         switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
835         case VIDEOSIZE_VGA:
836                 f->fmt.pix.width = 640;
837                 f->fmt.pix.height = 480;
838                 break;
839         case VIDEOSIZE_CIF:
840                 f->fmt.pix.width = 352;
841                 f->fmt.pix.height = 288;
842                 break;
843         case VIDEOSIZE_QVGA:
844                 f->fmt.pix.width = 320;
845                 f->fmt.pix.height = 240;
846                 break;
847         case VIDEOSIZE_288_216:
848                 f->fmt.pix.width = 288;
849                 f->fmt.pix.height = 216;
850                 break;
851         case VIDEOSIZE_256_192:
852                 f->fmt.pix.width = 256;
853                 f->fmt.pix.height = 192;
854                 break;
855         case VIDEOSIZE_224_168:
856                 f->fmt.pix.width = 224;
857                 f->fmt.pix.height = 168;
858                 break;
859         case VIDEOSIZE_192_144:
860                 f->fmt.pix.width = 192;
861                 f->fmt.pix.height = 144;
862                 break;
863         case VIDEOSIZE_QCIF:
864         default:
865                 f->fmt.pix.width = 176;
866                 f->fmt.pix.height = 144;
867                 break;
868         }
869
870         return 0;
871 }
872
873 /******************************************************************************
874  *
875  *  ioctl_set_fmt
876  *
877  *  V4L2 format set
878  *
879  *****************************************************************************/
880
881 static int ioctl_set_fmt(void *arg,struct camera_data *cam, struct cpia2_fh *fh)
882 {
883         struct v4l2_format *f = arg;
884         int err, frame;
885
886         err = ioctl_try_fmt(arg, cam);
887         if(err != 0)
888                 return err;
889
890         /* Ensure that only this process can change the format. */
891         err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
892         if(err != 0) {
893                 return err;
894         }
895
896         cam->pixelformat = f->fmt.pix.pixelformat;
897
898         /* NOTE: This should be set to 1 for MJPEG, but some apps don't handle
899          * the missing Huffman table properly. */
900         cam->params.compression.inhibit_htables = 0;
901                 /*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/
902
903         /* we set the video window to something smaller or equal to what
904          * is requested by the user???
905          */
906         DBG("Requested width = %d, height = %d\n",
907             f->fmt.pix.width, f->fmt.pix.height);
908         if (f->fmt.pix.width != cam->vw.width ||
909             f->fmt.pix.height != cam->vw.height) {
910                 cam->vw.width = f->fmt.pix.width;
911                 cam->vw.height = f->fmt.pix.height;
912                 cam->params.roi.width = f->fmt.pix.width;
913                 cam->params.roi.height = f->fmt.pix.height;
914                 cpia2_set_format(cam);
915         }
916
917         for (frame = 0; frame < cam->num_frames; ++frame) {
918                 if (cam->buffers[frame].status == FRAME_READING)
919                         if ((err = sync(cam, frame)) < 0)
920                                 return err;
921
922                 cam->buffers[frame].status = FRAME_EMPTY;
923         }
924
925         return 0;
926 }
927
928 /******************************************************************************
929  *
930  *  ioctl_get_fmt
931  *
932  *  V4L2 format get
933  *
934  *****************************************************************************/
935
936 static int ioctl_get_fmt(void *arg,struct camera_data *cam)
937 {
938         struct v4l2_format *f = arg;
939
940         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
941                return -EINVAL;
942
943         f->fmt.pix.width = cam->vw.width;
944         f->fmt.pix.height = cam->vw.height;
945         f->fmt.pix.pixelformat = cam->pixelformat;
946         f->fmt.pix.field = V4L2_FIELD_NONE;
947         f->fmt.pix.bytesperline = 0;
948         f->fmt.pix.sizeimage = cam->frame_size;
949         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
950         f->fmt.pix.priv = 0;
951
952         return 0;
953 }
954
955 /******************************************************************************
956  *
957  *  ioctl_cropcap
958  *
959  *  V4L2 query cropping capabilities
960  *  NOTE: cropping is currently disabled
961  *
962  *****************************************************************************/
963
964 static int ioctl_cropcap(void *arg,struct camera_data *cam)
965 {
966         struct v4l2_cropcap *c = arg;
967
968         if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
969                return -EINVAL;
970
971         c->bounds.left = 0;
972         c->bounds.top = 0;
973         c->bounds.width = cam->vw.width;
974         c->bounds.height = cam->vw.height;
975         c->defrect.left = 0;
976         c->defrect.top = 0;
977         c->defrect.width = cam->vw.width;
978         c->defrect.height = cam->vw.height;
979         c->pixelaspect.numerator = 1;
980         c->pixelaspect.denominator = 1;
981
982         return 0;
983 }
984
985 /******************************************************************************
986  *
987  *  ioctl_queryctrl
988  *
989  *  V4L2 query possible control variables
990  *
991  *****************************************************************************/
992
993 static int ioctl_queryctrl(void *arg,struct camera_data *cam)
994 {
995         struct v4l2_queryctrl *c = arg;
996         int i;
997
998         for(i=0; i<NUM_CONTROLS; ++i) {
999                 if(c->id == controls[i].id) {
1000                         memcpy(c, controls+i, sizeof(*c));
1001                         break;
1002                 }
1003         }
1004
1005         if(i == NUM_CONTROLS)
1006                 return -EINVAL;
1007
1008         /* Some devices have additional limitations */
1009         switch(c->id) {
1010         case V4L2_CID_BRIGHTNESS:
1011                 /***
1012                  * Don't let the register be set to zero - bug in VP4
1013                  * flash of full brightness
1014                  ***/
1015                 if (cam->params.pnp_id.device_type == DEVICE_STV_672)
1016                         c->minimum = 1;
1017                 break;
1018         case V4L2_CID_VFLIP:
1019                 // VP5 Only
1020                 if(cam->params.pnp_id.device_type == DEVICE_STV_672)
1021                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
1022                 break;
1023         case CPIA2_CID_FRAMERATE:
1024                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
1025                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
1026                         // Maximum 15fps
1027                         for(i=0; i<c->maximum; ++i) {
1028                                 if(framerate_controls[i].value ==
1029                                    CPIA2_VP_FRAMERATE_15) {
1030                                         c->maximum = i;
1031                                         c->default_value = i;
1032                                 }
1033                         }
1034                 }
1035                 break;
1036         case CPIA2_CID_FLICKER_MODE:
1037                 // Flicker control only valid for 672.
1038                 if(cam->params.pnp_id.device_type != DEVICE_STV_672)
1039                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
1040                 break;
1041         case CPIA2_CID_LIGHTS:
1042                 // Light control only valid for the QX5 Microscope.
1043                 if(cam->params.pnp_id.product != 0x151)
1044                         c->flags |= V4L2_CTRL_FLAG_DISABLED;
1045                 break;
1046         default:
1047                 break;
1048         }
1049
1050         return 0;
1051 }
1052
1053 /******************************************************************************
1054  *
1055  *  ioctl_querymenu
1056  *
1057  *  V4L2 query possible control variables
1058  *
1059  *****************************************************************************/
1060
1061 static int ioctl_querymenu(void *arg,struct camera_data *cam)
1062 {
1063         struct v4l2_querymenu *m = arg;
1064
1065         memset(m->name, 0, sizeof(m->name));
1066         m->reserved = 0;
1067
1068         switch(m->id) {
1069         case CPIA2_CID_FLICKER_MODE:
1070                 if(m->index < 0 || m->index >= NUM_FLICKER_CONTROLS)
1071                         return -EINVAL;
1072
1073                 strcpy(m->name, flicker_controls[m->index].name);
1074                 break;
1075         case CPIA2_CID_FRAMERATE:
1076             {
1077                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
1078                 if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
1079                    cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
1080                         // Maximum 15fps
1081                         int i;
1082                         for(i=0; i<maximum; ++i) {
1083                                 if(framerate_controls[i].value ==
1084                                    CPIA2_VP_FRAMERATE_15)
1085                                         maximum = i;
1086                         }
1087                 }
1088                 if(m->index < 0 || m->index > maximum)
1089                         return -EINVAL;
1090
1091                 strcpy(m->name, framerate_controls[m->index].name);
1092                 break;
1093             }
1094         case CPIA2_CID_LIGHTS:
1095                 if(m->index < 0 || m->index >= NUM_LIGHTS_CONTROLS)
1096                         return -EINVAL;
1097
1098                 strcpy(m->name, lights_controls[m->index].name);
1099                 break;
1100         default:
1101                 return -EINVAL;
1102         }
1103
1104         return 0;
1105 }
1106
1107 /******************************************************************************
1108  *
1109  *  ioctl_g_ctrl
1110  *
1111  *  V4L2 get the value of a control variable
1112  *
1113  *****************************************************************************/
1114
1115 static int ioctl_g_ctrl(void *arg,struct camera_data *cam)
1116 {
1117         struct v4l2_control *c = arg;
1118
1119         switch(c->id) {
1120         case V4L2_CID_BRIGHTNESS:
1121                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_BRIGHTNESS,
1122                                  TRANSFER_READ, 0);
1123                 c->value = cam->params.color_params.brightness;
1124                 break;
1125         case V4L2_CID_CONTRAST:
1126                 cpia2_do_command(cam, CPIA2_CMD_GET_CONTRAST,
1127                                  TRANSFER_READ, 0);
1128                 c->value = cam->params.color_params.contrast;
1129                 break;
1130         case V4L2_CID_SATURATION:
1131                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_SATURATION,
1132                                  TRANSFER_READ, 0);
1133                 c->value = cam->params.color_params.saturation;
1134                 break;
1135         case V4L2_CID_HFLIP:
1136                 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
1137                                  TRANSFER_READ, 0);
1138                 c->value = (cam->params.vp_params.user_effects &
1139                             CPIA2_VP_USER_EFFECTS_MIRROR) != 0;
1140                 break;
1141         case V4L2_CID_VFLIP:
1142                 cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
1143                                  TRANSFER_READ, 0);
1144                 c->value = (cam->params.vp_params.user_effects &
1145                             CPIA2_VP_USER_EFFECTS_FLIP) != 0;
1146                 break;
1147         case CPIA2_CID_TARGET_KB:
1148                 c->value = cam->params.vc_params.target_kb;
1149                 break;
1150         case CPIA2_CID_GPIO:
1151                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
1152                                  TRANSFER_READ, 0);
1153                 c->value = cam->params.vp_params.gpio_data;
1154                 break;
1155         case CPIA2_CID_FLICKER_MODE:
1156         {
1157                 int i, mode;
1158                 cpia2_do_command(cam, CPIA2_CMD_GET_FLICKER_MODES,
1159                                  TRANSFER_READ, 0);
1160                 if(cam->params.flicker_control.cam_register &
1161                    CPIA2_VP_FLICKER_MODES_NEVER_FLICKER) {
1162                         mode = NEVER_FLICKER;
1163                 } else {
1164                     if(cam->params.flicker_control.cam_register &
1165                        CPIA2_VP_FLICKER_MODES_50HZ) {
1166                         mode = FLICKER_50;
1167                     } else {
1168                         mode = FLICKER_60;
1169                     }
1170                 }
1171                 for(i=0; i<NUM_FLICKER_CONTROLS; i++) {
1172                         if(flicker_controls[i].value == mode) {
1173                                 c->value = i;
1174                                 break;
1175                         }
1176                 }
1177                 if(i == NUM_FLICKER_CONTROLS)
1178                         return -EINVAL;
1179                 break;
1180         }
1181         case CPIA2_CID_FRAMERATE:
1182         {
1183                 int maximum = NUM_FRAMERATE_CONTROLS - 1;
1184                 int i;
1185                 for(i=0; i<= maximum; i++) {
1186                         if(cam->params.vp_params.frame_rate ==
1187                            framerate_controls[i].value)
1188                                 break;
1189                 }
1190                 if(i > maximum)
1191                         return -EINVAL;
1192                 c->value = i;
1193                 break;
1194         }
1195         case CPIA2_CID_USB_ALT:
1196                 c->value = cam->params.camera_state.stream_mode;
1197                 break;
1198         case CPIA2_CID_LIGHTS:
1199         {
1200                 int i;
1201                 cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
1202                                  TRANSFER_READ, 0);
1203                 for(i=0; i<NUM_LIGHTS_CONTROLS; i++) {
1204                         if((cam->params.vp_params.gpio_data&GPIO_LIGHTS_MASK) ==
1205                            lights_controls[i].value) {
1206                                 break;
1207                         }
1208                 }
1209                 if(i == NUM_LIGHTS_CONTROLS)
1210                         return -EINVAL;
1211                 c->value = i;
1212                 break;
1213         }
1214         case CPIA2_CID_RESET_CAMERA:
1215                 return -EINVAL;
1216         default:
1217                 return -EINVAL;
1218         }
1219
1220         DBG("Get control id:%d, value:%d\n", c->id, c->value);
1221
1222         return 0;
1223 }
1224
1225 /******************************************************************************
1226  *
1227  *  ioctl_s_ctrl
1228  *
1229  *  V4L2 set the value of a control variable
1230  *
1231  *****************************************************************************/
1232
1233 static int ioctl_s_ctrl(void *arg,struct camera_data *cam)
1234 {
1235         struct v4l2_control *c = arg;
1236         int i;
1237         int retval = 0;
1238
1239         DBG("Set control id:%d, value:%d\n", c->id, c->value);
1240
1241         /* Check that the value is in range */
1242         for(i=0; i<NUM_CONTROLS; i++) {
1243                 if(c->id == controls[i].id) {
1244                         if(c->value < controls[i].minimum ||
1245                            c->value > controls[i].maximum) {
1246                                 return -EINVAL;
1247                         }
1248                         break;
1249                 }
1250         }
1251         if(i == NUM_CONTROLS)
1252                 return -EINVAL;
1253
1254         switch(c->id) {
1255         case V4L2_CID_BRIGHTNESS:
1256                 cpia2_set_brightness(cam, c->value);
1257                 break;
1258         case V4L2_CID_CONTRAST:
1259                 cpia2_set_contrast(cam, c->value);
1260                 break;
1261         case V4L2_CID_SATURATION:
1262                 cpia2_set_saturation(cam, c->value);
1263                 break;
1264         case V4L2_CID_HFLIP:
1265                 cpia2_set_property_mirror(cam, c->value);
1266                 break;
1267         case V4L2_CID_VFLIP:
1268                 cpia2_set_property_flip(cam, c->value);
1269                 break;
1270         case CPIA2_CID_TARGET_KB:
1271                 retval = cpia2_set_target_kb(cam, c->value);
1272                 break;
1273         case CPIA2_CID_GPIO:
1274                 retval = cpia2_set_gpio(cam, c->value);
1275                 break;
1276         case CPIA2_CID_FLICKER_MODE:
1277                 retval = cpia2_set_flicker_mode(cam,
1278                                               flicker_controls[c->value].value);
1279                 break;
1280         case CPIA2_CID_FRAMERATE:
1281                 retval = cpia2_set_fps(cam, framerate_controls[c->value].value);
1282                 break;
1283         case CPIA2_CID_USB_ALT:
1284                 retval = cpia2_usb_change_streaming_alternate(cam, c->value);
1285                 break;
1286         case CPIA2_CID_LIGHTS:
1287                 retval = cpia2_set_gpio(cam, lights_controls[c->value].value);
1288                 break;
1289         case CPIA2_CID_RESET_CAMERA:
1290                 cpia2_usb_stream_pause(cam);
1291                 cpia2_reset_camera(cam);
1292                 cpia2_usb_stream_resume(cam);
1293                 break;
1294         default:
1295                 retval = -EINVAL;
1296         }
1297
1298         return retval;
1299 }
1300
1301 /******************************************************************************
1302  *
1303  *  ioctl_g_jpegcomp
1304  *
1305  *  V4L2 get the JPEG compression parameters
1306  *
1307  *****************************************************************************/
1308
1309 static int ioctl_g_jpegcomp(void *arg,struct camera_data *cam)
1310 {
1311         struct v4l2_jpegcompression *parms = arg;
1312
1313         memset(parms, 0, sizeof(*parms));
1314
1315         parms->quality = 80; // TODO: Can this be made meaningful?
1316
1317         parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI;
1318         if(!cam->params.compression.inhibit_htables) {
1319                 parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT;
1320         }
1321
1322         parms->APPn = cam->APPn;
1323         parms->APP_len = cam->APP_len;
1324         if(cam->APP_len > 0) {
1325                 memcpy(parms->APP_data, cam->APP_data, cam->APP_len);
1326                 parms->jpeg_markers |= V4L2_JPEG_MARKER_APP;
1327         }
1328
1329         parms->COM_len = cam->COM_len;
1330         if(cam->COM_len > 0) {
1331                 memcpy(parms->COM_data, cam->COM_data, cam->COM_len);
1332                 parms->jpeg_markers |= JPEG_MARKER_COM;
1333         }
1334
1335         DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n",
1336             parms->APP_len, parms->COM_len);
1337
1338         return 0;
1339 }
1340
1341 /******************************************************************************
1342  *
1343  *  ioctl_s_jpegcomp
1344  *
1345  *  V4L2 set the JPEG compression parameters
1346  *  NOTE: quality and some jpeg_markers are ignored.
1347  *
1348  *****************************************************************************/
1349
1350 static int ioctl_s_jpegcomp(void *arg,struct camera_data *cam)
1351 {
1352         struct v4l2_jpegcompression *parms = arg;
1353
1354         DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n",
1355             parms->APP_len, parms->COM_len);
1356
1357         cam->params.compression.inhibit_htables =
1358                 !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
1359
1360         if(parms->APP_len != 0) {
1361                 if(parms->APP_len > 0 &&
1362                    parms->APP_len <= sizeof(cam->APP_data) &&
1363                    parms->APPn >= 0 && parms->APPn <= 15) {
1364                         cam->APPn = parms->APPn;
1365                         cam->APP_len = parms->APP_len;
1366                         memcpy(cam->APP_data, parms->APP_data, parms->APP_len);
1367                 } else {
1368                         LOG("Bad APPn Params n=%d len=%d\n",
1369                             parms->APPn, parms->APP_len);
1370                         return -EINVAL;
1371                 }
1372         } else {
1373                 cam->APP_len = 0;
1374         }
1375
1376         if(parms->COM_len != 0) {
1377                 if(parms->COM_len > 0 &&
1378                    parms->COM_len <= sizeof(cam->COM_data)) {
1379                         cam->COM_len = parms->COM_len;
1380                         memcpy(cam->COM_data, parms->COM_data, parms->COM_len);
1381                 } else {
1382                         LOG("Bad COM_len=%d\n", parms->COM_len);
1383                         return -EINVAL;
1384                 }
1385         }
1386
1387         return 0;
1388 }
1389
1390 /******************************************************************************
1391  *
1392  *  ioctl_reqbufs
1393  *
1394  *  V4L2 Initiate memory mapping.
1395  *  NOTE: The user's request is ignored. For now the buffers are fixed.
1396  *
1397  *****************************************************************************/
1398
1399 static int ioctl_reqbufs(void *arg,struct camera_data *cam)
1400 {
1401         struct v4l2_requestbuffers *req = arg;
1402
1403         if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1404            req->memory != V4L2_MEMORY_MMAP)
1405                 return -EINVAL;
1406
1407         DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames);
1408         req->count = cam->num_frames;
1409         memset(&req->reserved, 0, sizeof(req->reserved));
1410
1411         return 0;
1412 }
1413
1414 /******************************************************************************
1415  *
1416  *  ioctl_querybuf
1417  *
1418  *  V4L2 Query memory buffer status.
1419  *
1420  *****************************************************************************/
1421
1422 static int ioctl_querybuf(void *arg,struct camera_data *cam)
1423 {
1424         struct v4l2_buffer *buf = arg;
1425
1426         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1427            buf->index > cam->num_frames)
1428                 return -EINVAL;
1429
1430         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1431         buf->length = cam->frame_size;
1432
1433         buf->memory = V4L2_MEMORY_MMAP;
1434
1435         if(cam->mmapped)
1436                 buf->flags = V4L2_BUF_FLAG_MAPPED;
1437         else
1438                 buf->flags = 0;
1439
1440         switch (cam->buffers[buf->index].status) {
1441         case FRAME_EMPTY:
1442         case FRAME_ERROR:
1443         case FRAME_READING:
1444                 buf->bytesused = 0;
1445                 buf->flags = V4L2_BUF_FLAG_QUEUED;
1446                 break;
1447         case FRAME_READY:
1448                 buf->bytesused = cam->buffers[buf->index].length;
1449                 buf->timestamp = cam->buffers[buf->index].timestamp;
1450                 buf->sequence = cam->buffers[buf->index].seq;
1451                 buf->flags = V4L2_BUF_FLAG_DONE;
1452                 break;
1453         }
1454
1455         DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n",
1456              buf->index, buf->m.offset, buf->flags, buf->sequence,
1457              buf->bytesused);
1458
1459         return 0;
1460 }
1461
1462 /******************************************************************************
1463  *
1464  *  ioctl_qbuf
1465  *
1466  *  V4L2 User is freeing buffer
1467  *
1468  *****************************************************************************/
1469
1470 static int ioctl_qbuf(void *arg,struct camera_data *cam)
1471 {
1472         struct v4l2_buffer *buf = arg;
1473
1474         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1475            buf->memory != V4L2_MEMORY_MMAP ||
1476            buf->index > cam->num_frames)
1477                 return -EINVAL;
1478
1479         DBG("QBUF #%d\n", buf->index);
1480
1481         if(cam->buffers[buf->index].status == FRAME_READY)
1482                 cam->buffers[buf->index].status = FRAME_EMPTY;
1483
1484         return 0;
1485 }
1486
1487 /******************************************************************************
1488  *
1489  *  find_earliest_filled_buffer
1490  *
1491  *  Helper for ioctl_dqbuf. Find the next ready buffer.
1492  *
1493  *****************************************************************************/
1494
1495 static int find_earliest_filled_buffer(struct camera_data *cam)
1496 {
1497         int i;
1498         int found = -1;
1499         for (i=0; i<cam->num_frames; i++) {
1500                 if(cam->buffers[i].status == FRAME_READY) {
1501                         if(found < 0) {
1502                                 found = i;
1503                         } else {
1504                                 /* find which buffer is earlier */
1505                                 struct timeval *tv1, *tv2;
1506                                 tv1 = &cam->buffers[i].timestamp;
1507                                 tv2 = &cam->buffers[found].timestamp;
1508                                 if(tv1->tv_sec < tv2->tv_sec ||
1509                                    (tv1->tv_sec == tv2->tv_sec &&
1510                                     tv1->tv_usec < tv2->tv_usec))
1511                                         found = i;
1512                         }
1513                 }
1514         }
1515         return found;
1516 }
1517
1518 /******************************************************************************
1519  *
1520  *  ioctl_dqbuf
1521  *
1522  *  V4L2 User is asking for a filled buffer.
1523  *
1524  *****************************************************************************/
1525
1526 static int ioctl_dqbuf(void *arg,struct camera_data *cam, struct file *file)
1527 {
1528         struct v4l2_buffer *buf = arg;
1529         int frame;
1530
1531         if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1532            buf->memory != V4L2_MEMORY_MMAP)
1533                 return -EINVAL;
1534
1535         frame = find_earliest_filled_buffer(cam);
1536
1537         if(frame < 0 && file->f_flags&O_NONBLOCK)
1538                 return -EAGAIN;
1539
1540         if(frame < 0) {
1541                 /* Wait for a frame to become available */
1542                 struct framebuf *cb=cam->curbuff;
1543                 mutex_unlock(&cam->busy_lock);
1544                 wait_event_interruptible(cam->wq_stream,
1545                                          !cam->present ||
1546                                          (cb=cam->curbuff)->status == FRAME_READY);
1547                 mutex_lock(&cam->busy_lock);
1548                 if (signal_pending(current))
1549                         return -ERESTARTSYS;
1550                 if(!cam->present)
1551                         return -ENOTTY;
1552                 frame = cb->num;
1553         }
1554
1555
1556         buf->index = frame;
1557         buf->bytesused = cam->buffers[buf->index].length;
1558         buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE;
1559         buf->field = V4L2_FIELD_NONE;
1560         buf->timestamp = cam->buffers[buf->index].timestamp;
1561         buf->sequence = cam->buffers[buf->index].seq;
1562         buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
1563         buf->length = cam->frame_size;
1564         buf->input = 0;
1565         buf->reserved = 0;
1566         memset(&buf->timecode, 0, sizeof(buf->timecode));
1567
1568         DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index,
1569             cam->buffers[buf->index].status, buf->sequence, buf->bytesused);
1570
1571         return 0;
1572 }
1573
1574 /******************************************************************************
1575  *
1576  *  cpia2_ioctl
1577  *
1578  *****************************************************************************/
1579 static int cpia2_do_ioctl(struct inode *inode, struct file *file,
1580                           unsigned int ioctl_nr, void *arg)
1581 {
1582         struct video_device *dev = video_devdata(file);
1583         struct camera_data *cam = video_get_drvdata(dev);
1584         int retval = 0;
1585
1586         if (!cam)
1587                 return -ENOTTY;
1588
1589         /* make this _really_ smp-safe */
1590         if (mutex_lock_interruptible(&cam->busy_lock))
1591                 return -ERESTARTSYS;
1592
1593         if (!cam->present) {
1594                 mutex_unlock(&cam->busy_lock);
1595                 return -ENODEV;
1596         }
1597
1598         /* Priority check */
1599         switch (ioctl_nr) {
1600         case VIDIOCSWIN:
1601         case VIDIOCMCAPTURE:
1602         case VIDIOC_S_FMT:
1603         {
1604                 struct cpia2_fh *fh = file->private_data;
1605                 retval = v4l2_prio_check(&cam->prio, &fh->prio);
1606                 if(retval) {
1607                         mutex_unlock(&cam->busy_lock);
1608                         return retval;
1609                 }
1610                 break;
1611         }
1612         case VIDIOCGMBUF:
1613         case VIDIOCSYNC:
1614         {
1615                 struct cpia2_fh *fh = file->private_data;
1616                 if(fh->prio != V4L2_PRIORITY_RECORD) {
1617                         mutex_unlock(&cam->busy_lock);
1618                         return -EBUSY;
1619                 }
1620                 break;
1621         }
1622         default:
1623                 break;
1624         }
1625
1626         switch (ioctl_nr) {
1627         case VIDIOCGCAP:        /* query capabilities */
1628                 retval = ioctl_cap_query(arg, cam);
1629                 break;
1630
1631         case VIDIOCGCHAN:       /* get video source - we are a camera, nothing else */
1632                 retval = ioctl_get_channel(arg);
1633                 break;
1634         case VIDIOCSCHAN:       /* set video source - we are a camera, nothing else */
1635                 retval = ioctl_set_channel(arg);
1636                 break;
1637         case VIDIOCGPICT:       /* image properties */
1638                 memcpy(arg, &cam->vp, sizeof(struct video_picture));
1639                 break;
1640         case VIDIOCSPICT:
1641                 retval = ioctl_set_image_prop(arg, cam);
1642                 break;
1643         case VIDIOCGWIN:        /* get/set capture window */
1644                 memcpy(arg, &cam->vw, sizeof(struct video_window));
1645                 break;
1646         case VIDIOCSWIN:
1647                 retval = ioctl_set_window_size(arg, cam, file->private_data);
1648                 break;
1649         case VIDIOCGMBUF:       /* mmap interface */
1650                 retval = ioctl_get_mbuf(arg, cam);
1651                 break;
1652         case VIDIOCMCAPTURE:
1653                 retval = ioctl_mcapture(arg, cam, file->private_data);
1654                 break;
1655         case VIDIOCSYNC:
1656                 retval = ioctl_sync(arg, cam);
1657                 break;
1658                 /* pointless to implement overlay with this camera */
1659         case VIDIOCCAPTURE:
1660         case VIDIOCGFBUF:
1661         case VIDIOCSFBUF:
1662         case VIDIOCKEY:
1663                 retval = -EINVAL;
1664                 break;
1665
1666                 /* tuner interface - we have none */
1667         case VIDIOCGTUNER:
1668         case VIDIOCSTUNER:
1669         case VIDIOCGFREQ:
1670         case VIDIOCSFREQ:
1671                 retval = -EINVAL;
1672                 break;
1673
1674                 /* audio interface - we have none */
1675         case VIDIOCGAUDIO:
1676         case VIDIOCSAUDIO:
1677                 retval = -EINVAL;
1678                 break;
1679
1680         /* CPIA2 extension to Video4Linux API */
1681         case CPIA2_IOC_SET_GPIO:
1682                 retval = ioctl_set_gpio(arg, cam);
1683                 break;
1684         case VIDIOC_QUERYCAP:
1685                 retval = ioctl_querycap(arg,cam);
1686                 break;
1687
1688         case VIDIOC_ENUMINPUT:
1689         case VIDIOC_G_INPUT:
1690         case VIDIOC_S_INPUT:
1691                 retval = ioctl_input(ioctl_nr, arg,cam);
1692                 break;
1693
1694         case VIDIOC_ENUM_FMT:
1695                 retval = ioctl_enum_fmt(arg,cam);
1696                 break;
1697         case VIDIOC_TRY_FMT:
1698                 retval = ioctl_try_fmt(arg,cam);
1699                 break;
1700         case VIDIOC_G_FMT:
1701                 retval = ioctl_get_fmt(arg,cam);
1702                 break;
1703         case VIDIOC_S_FMT:
1704                 retval = ioctl_set_fmt(arg,cam,file->private_data);
1705                 break;
1706
1707         case VIDIOC_CROPCAP:
1708                 retval = ioctl_cropcap(arg,cam);
1709                 break;
1710         case VIDIOC_G_CROP:
1711         case VIDIOC_S_CROP:
1712                 // TODO: I think cropping can be implemented - SJB
1713                 retval = -EINVAL;
1714                 break;
1715
1716         case VIDIOC_QUERYCTRL:
1717                 retval = ioctl_queryctrl(arg,cam);
1718                 break;
1719         case VIDIOC_QUERYMENU:
1720                 retval = ioctl_querymenu(arg,cam);
1721                 break;
1722         case VIDIOC_G_CTRL:
1723                 retval = ioctl_g_ctrl(arg,cam);
1724                 break;
1725         case VIDIOC_S_CTRL:
1726                 retval = ioctl_s_ctrl(arg,cam);
1727                 break;
1728
1729         case VIDIOC_G_JPEGCOMP:
1730                 retval = ioctl_g_jpegcomp(arg,cam);
1731                 break;
1732         case VIDIOC_S_JPEGCOMP:
1733                 retval = ioctl_s_jpegcomp(arg,cam);
1734                 break;
1735
1736         case VIDIOC_G_PRIORITY:
1737         {
1738                 struct cpia2_fh *fh = file->private_data;
1739                 *(enum v4l2_priority*)arg = fh->prio;
1740                 break;
1741         }
1742         case VIDIOC_S_PRIORITY:
1743         {
1744                 struct cpia2_fh *fh = file->private_data;
1745                 enum v4l2_priority prio;
1746                 prio = *(enum v4l2_priority*)arg;
1747                 if(cam->streaming &&
1748                    prio != fh->prio &&
1749                    fh->prio == V4L2_PRIORITY_RECORD) {
1750                         /* Can't drop record priority while streaming */
1751                         retval = -EBUSY;
1752                 } else if(prio == V4L2_PRIORITY_RECORD &&
1753                    prio != fh->prio &&
1754                    v4l2_prio_max(&cam->prio) == V4L2_PRIORITY_RECORD) {
1755                         /* Only one program can record at a time */
1756                         retval = -EBUSY;
1757                 } else {
1758                         retval = v4l2_prio_change(&cam->prio, &fh->prio, prio);
1759                 }
1760                 break;
1761         }
1762
1763         case VIDIOC_REQBUFS:
1764                 retval = ioctl_reqbufs(arg,cam);
1765                 break;
1766         case VIDIOC_QUERYBUF:
1767                 retval = ioctl_querybuf(arg,cam);
1768                 break;
1769         case VIDIOC_QBUF:
1770                 retval = ioctl_qbuf(arg,cam);
1771                 break;
1772         case VIDIOC_DQBUF:
1773                 retval = ioctl_dqbuf(arg,cam,file);
1774                 break;
1775         case VIDIOC_STREAMON:
1776         {
1777                 int type;
1778                 DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming);
1779                 type = *(int*)arg;
1780                 if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1781                         retval = -EINVAL;
1782
1783                 if(!cam->streaming) {
1784                         retval = cpia2_usb_stream_start(cam,
1785                                           cam->params.camera_state.stream_mode);
1786                 } else {
1787                         retval = -EINVAL;
1788                 }
1789
1790                 break;
1791         }
1792         case VIDIOC_STREAMOFF:
1793         {
1794                 int type;
1795                 DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming);
1796                 type = *(int*)arg;
1797                 if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1798                         retval = -EINVAL;
1799
1800                 if(cam->streaming) {
1801                         retval = cpia2_usb_stream_stop(cam);
1802                 } else {
1803                         retval = -EINVAL;
1804                 }
1805
1806                 break;
1807         }
1808
1809         case VIDIOC_ENUMOUTPUT:
1810         case VIDIOC_G_OUTPUT:
1811         case VIDIOC_S_OUTPUT:
1812         case VIDIOC_G_MODULATOR:
1813         case VIDIOC_S_MODULATOR:
1814
1815         case VIDIOC_ENUMAUDIO:
1816         case VIDIOC_G_AUDIO:
1817         case VIDIOC_S_AUDIO:
1818
1819         case VIDIOC_ENUMAUDOUT:
1820         case VIDIOC_G_AUDOUT:
1821         case VIDIOC_S_AUDOUT:
1822
1823         case VIDIOC_ENUMSTD:
1824         case VIDIOC_QUERYSTD:
1825         case VIDIOC_G_STD:
1826         case VIDIOC_S_STD:
1827
1828         case VIDIOC_G_TUNER:
1829         case VIDIOC_S_TUNER:
1830         case VIDIOC_G_FREQUENCY:
1831         case VIDIOC_S_FREQUENCY:
1832
1833         case VIDIOC_OVERLAY:
1834         case VIDIOC_G_FBUF:
1835         case VIDIOC_S_FBUF:
1836
1837         case VIDIOC_G_PARM:
1838         case VIDIOC_S_PARM:
1839                 retval = -EINVAL;
1840                 break;
1841         default:
1842                 retval = -ENOIOCTLCMD;
1843                 break;
1844         }
1845
1846         mutex_unlock(&cam->busy_lock);
1847         return retval;
1848 }
1849
1850 static int cpia2_ioctl(struct inode *inode, struct file *file,
1851                        unsigned int ioctl_nr, unsigned long iarg)
1852 {
1853         return video_usercopy(inode, file, ioctl_nr, iarg, cpia2_do_ioctl);
1854 }
1855
1856 /******************************************************************************
1857  *
1858  *  cpia2_mmap
1859  *
1860  *****************************************************************************/
1861 static int cpia2_mmap(struct file *file, struct vm_area_struct *area)
1862 {
1863         int retval;
1864         struct video_device *dev = video_devdata(file);
1865         struct camera_data *cam = video_get_drvdata(dev);
1866
1867         /* Priority check */
1868         struct cpia2_fh *fh = file->private_data;
1869         if(fh->prio != V4L2_PRIORITY_RECORD) {
1870                 return -EBUSY;
1871         }
1872
1873         retval = cpia2_remap_buffer(cam, area);
1874
1875         if(!retval)
1876                 fh->mmapped = 1;
1877         return retval;
1878 }
1879
1880 /******************************************************************************
1881  *
1882  *  reset_camera_struct_v4l
1883  *
1884  *  Sets all values to the defaults
1885  *****************************************************************************/
1886 static void reset_camera_struct_v4l(struct camera_data *cam)
1887 {
1888         /***
1889          * Fill in the v4l structures.  video_cap is filled in inside the VIDIOCCAP
1890          * Ioctl.  Here, just do the window and picture stucts.
1891          ***/
1892         cam->vp.palette = (u16) VIDEO_PALETTE_RGB24;    /* Is this right? */
1893         cam->vp.brightness = (u16) cam->params.color_params.brightness * 256;
1894         cam->vp.colour = (u16) cam->params.color_params.saturation * 256;
1895         cam->vp.contrast = (u16) cam->params.color_params.contrast * 256;
1896
1897         cam->vw.x = 0;
1898         cam->vw.y = 0;
1899         cam->vw.width = cam->params.roi.width;
1900         cam->vw.height = cam->params.roi.height;
1901         cam->vw.flags = 0;
1902         cam->vw.clipcount = 0;
1903
1904         cam->frame_size = buffer_size;
1905         cam->num_frames = num_buffers;
1906
1907         /* FlickerModes */
1908         cam->params.flicker_control.flicker_mode_req = flicker_mode;
1909         cam->params.flicker_control.mains_frequency = flicker_freq;
1910
1911         /* streamMode */
1912         cam->params.camera_state.stream_mode = alternate;
1913
1914         cam->pixelformat = V4L2_PIX_FMT_JPEG;
1915         v4l2_prio_init(&cam->prio);
1916         return;
1917 }
1918
1919 /***
1920  * The v4l video device structure initialized for this device
1921  ***/
1922 static const struct file_operations fops_template = {
1923         .owner          = THIS_MODULE,
1924         .open           = cpia2_open,
1925         .release        = cpia2_close,
1926         .read           = cpia2_v4l_read,
1927         .poll           = cpia2_v4l_poll,
1928         .ioctl          = cpia2_ioctl,
1929         .llseek         = no_llseek,
1930 #ifdef CONFIG_COMPAT
1931         .compat_ioctl   = v4l_compat_ioctl32,
1932 #endif
1933         .mmap           = cpia2_mmap,
1934 };
1935
1936 static struct video_device cpia2_template = {
1937         /* I could not find any place for the old .initialize initializer?? */
1938         .name=          "CPiA2 Camera",
1939         .minor=         -1,
1940         .fops=          &fops_template,
1941         .release=       video_device_release,
1942 };
1943
1944 /******************************************************************************
1945  *
1946  *  cpia2_register_camera
1947  *
1948  *****************************************************************************/
1949 int cpia2_register_camera(struct camera_data *cam)
1950 {
1951         cam->vdev = video_device_alloc();
1952         if(!cam->vdev)
1953                 return -ENOMEM;
1954
1955         memcpy(cam->vdev, &cpia2_template, sizeof(cpia2_template));
1956         video_set_drvdata(cam->vdev, cam);
1957
1958         reset_camera_struct_v4l(cam);
1959
1960         /* register v4l device */
1961         if (video_register_device(cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
1962                 ERR("video_register_device failed\n");
1963                 video_device_release(cam->vdev);
1964                 return -ENODEV;
1965         }
1966
1967         return 0;
1968 }
1969
1970 /******************************************************************************
1971  *
1972  *  cpia2_unregister_camera
1973  *
1974  *****************************************************************************/
1975 void cpia2_unregister_camera(struct camera_data *cam)
1976 {
1977         if (!cam->open_count) {
1978                 video_unregister_device(cam->vdev);
1979         } else {
1980                 LOG("/dev/video%d removed while open, "
1981                     "deferring video_unregister_device\n",
1982                     cam->vdev->minor);
1983         }
1984 }
1985
1986 /******************************************************************************
1987  *
1988  *  check_parameters
1989  *
1990  *  Make sure that all user-supplied parameters are sensible
1991  *****************************************************************************/
1992 static void __init check_parameters(void)
1993 {
1994         if(buffer_size < PAGE_SIZE) {
1995                 buffer_size = PAGE_SIZE;
1996                 LOG("buffer_size too small, setting to %d\n", buffer_size);
1997         } else if(buffer_size > 1024*1024) {
1998                 /* arbitrary upper limiit */
1999                 buffer_size = 1024*1024;
2000                 LOG("buffer_size ridiculously large, setting to %d\n",
2001                     buffer_size);
2002         } else {
2003                 buffer_size += PAGE_SIZE-1;
2004                 buffer_size &= ~(PAGE_SIZE-1);
2005         }
2006
2007         if(num_buffers < 1) {
2008                 num_buffers = 1;
2009                 LOG("num_buffers too small, setting to %d\n", num_buffers);
2010         } else if(num_buffers > VIDEO_MAX_FRAME) {
2011                 num_buffers = VIDEO_MAX_FRAME;
2012                 LOG("num_buffers too large, setting to %d\n", num_buffers);
2013         }
2014
2015         if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) {
2016                 alternate = DEFAULT_ALT;
2017                 LOG("alternate specified is invalid, using %d\n", alternate);
2018         }
2019
2020         if (flicker_mode != NEVER_FLICKER && flicker_mode != ANTI_FLICKER_ON) {
2021                 flicker_mode = NEVER_FLICKER;
2022                 LOG("Flicker mode specified is invalid, using %d\n",
2023                     flicker_mode);
2024         }
2025
2026         if (flicker_freq != FLICKER_50 && flicker_freq != FLICKER_60) {
2027                 flicker_freq = FLICKER_60;
2028                 LOG("Flicker mode specified is invalid, using %d\n",
2029                     flicker_freq);
2030         }
2031
2032         if(video_nr < -1 || video_nr > 64) {
2033                 video_nr = -1;
2034                 LOG("invalid video_nr specified, must be -1 to 64\n");
2035         }
2036
2037         DBG("Using %d buffers, each %d bytes, alternate=%d\n",
2038             num_buffers, buffer_size, alternate);
2039 }
2040
2041 /************   Module Stuff ***************/
2042
2043
2044 /******************************************************************************
2045  *
2046  * cpia2_init/module_init
2047  *
2048  *****************************************************************************/
2049 static int __init cpia2_init(void)
2050 {
2051         LOG("%s v%d.%d.%d\n",
2052             ABOUT, CPIA2_MAJ_VER, CPIA2_MIN_VER, CPIA2_PATCH_VER);
2053         check_parameters();
2054         cpia2_usb_init();
2055         return 0;
2056 }
2057
2058
2059 /******************************************************************************
2060  *
2061  * cpia2_exit/module_exit
2062  *
2063  *****************************************************************************/
2064 static void __exit cpia2_exit(void)
2065 {
2066         cpia2_usb_cleanup();
2067         schedule_timeout(2 * HZ);
2068 }
2069
2070 module_init(cpia2_init);
2071 module_exit(cpia2_exit);
2072