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V4L/DVB (6014): vivi: use videobuf_read_stream()
[deliverable/linux.git] / drivers / media / video / vivi.c
CommitLineData
1e6dd65e
MCC		 1/*
2 * Virtual Video driver - This code emulates a real video device with v4l2 api
3 *
4 * Copyright (c) 2006 by:
5 * Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
6 * Ted Walther <ted--a.t--enumera.com>
7 * John Sokol <sokol--a.t--videotechnology.com>
8 * http://v4l.videotechnology.com/
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the BSD Licence, GNU General Public License
12 * as published by the Free Software Foundation; either version 2 of the
13 * License, or (at your option) any later version
14 */
15#include <linux/module.h>
16#include <linux/delay.h>
17#include <linux/errno.h>
18#include <linux/fs.h>
19#include <linux/kernel.h>
20#include <linux/slab.h>
21#include <linux/mm.h>
22#include <linux/ioport.h>
23#include <linux/init.h>
24#include <linux/sched.h>
25#include <linux/pci.h>
26#include <linux/random.h>
27#include <linux/version.h>
51b54029 28#include <linux/mutex.h>
1e6dd65e 29#include <linux/videodev2.h>
1095136d 30#include <linux/dma-mapping.h>
cd41e28e
MCC		 31#ifdef CONFIG_VIDEO_V4L1_COMPAT
32/* Include V4L1 specific functions. Should be removed soon */
33#include <linux/videodev.h>
34#endif
f13df919 35#include <linux/interrupt.h>
1e6dd65e
MCC		 36#include <media/video-buf.h>
37#include <media/v4l2-common.h>
38#include <linux/kthread.h>
39#include <linux/highmem.h>
7dfb7103 40#include <linux/freezer.h>
1e6dd65e
MCC		 41
42/* Wake up at about 30 fps */
43#define WAKE_NUMERATOR 30
44#define WAKE_DENOMINATOR 1001
45#define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
46
47/* These timers are for 1 fps - used only for testing */
48//#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
49//#define BUFFER_TIMEOUT msecs_to_jiffies(5000) /* 5 seconds */
50
51#include "font.h"
52
1e6dd65e
MCC		 53#define VIVI_MAJOR_VERSION 0
54#define VIVI_MINOR_VERSION 4
55#define VIVI_RELEASE 0
56#define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
57
c820cc45
MCC		 58/* Declare static vars that will be used as parameters */
59static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
60static struct video_device vivi; /* Video device */
61static int video_nr = -1; /* /dev/videoN, -1 for autodetect */
1e6dd65e
MCC		 62
63/* supported controls */
64static struct v4l2_queryctrl vivi_qctrl[] = {
65 {
66 .id = V4L2_CID_AUDIO_VOLUME,
67 .name = "Volume",
68 .minimum = 0,
69 .maximum = 65535,
70 .step = 65535/100,
71 .default_value = 65535,
72 .flags = 0,
73 .type = V4L2_CTRL_TYPE_INTEGER,
74 },{
75 .id = V4L2_CID_BRIGHTNESS,
76 .type = V4L2_CTRL_TYPE_INTEGER,
77 .name = "Brightness",
78 .minimum = 0,
79 .maximum = 255,
80 .step = 1,
81 .default_value = 127,
82 .flags = 0,
83 }, {
84 .id = V4L2_CID_CONTRAST,
85 .type = V4L2_CTRL_TYPE_INTEGER,
86 .name = "Contrast",
87 .minimum = 0,
88 .maximum = 255,
89 .step = 0x1,
90 .default_value = 0x10,
91 .flags = 0,
92 }, {
93 .id = V4L2_CID_SATURATION,
94 .type = V4L2_CTRL_TYPE_INTEGER,
95 .name = "Saturation",
96 .minimum = 0,
97 .maximum = 255,
98 .step = 0x1,
99 .default_value = 127,
100 .flags = 0,
101 }, {
102 .id = V4L2_CID_HUE,
103 .type = V4L2_CTRL_TYPE_INTEGER,
104 .name = "Hue",
105 .minimum = -128,
106 .maximum = 127,
107 .step = 0x1,
108 .default_value = 0,
109 .flags = 0,
110 }
111};
112
113static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
114
c820cc45
MCC		 115#define dprintk(level,fmt, arg...) \
116 do { \
117 if (vivi.debug >= (level)) \
118 printk(KERN_DEBUG "vivi: " fmt , ## arg); \
1e6dd65e
MCC		 119 } while (0)
120
121/* ------------------------------------------------------------------
122 Basic structures
123 ------------------------------------------------------------------*/
124
125struct vivi_fmt {
126 char *name;
127 u32 fourcc; /* v4l2 format id */
128 int depth;
129};
130
131static struct vivi_fmt format = {
132 .name = "4:2:2, packed, YUYV",
133 .fourcc = V4L2_PIX_FMT_YUYV,
134 .depth = 16,
135};
136
137struct sg_to_addr {
138 int pos;
139 struct scatterlist *sg;
140};
141
142/* buffer for one video frame */
143struct vivi_buffer {
144 /* common v4l buffer stuff -- must be first */
145 struct videobuf_buffer vb;
146
147 struct vivi_fmt *fmt;
148
1e6dd65e
MCC		 149};
150
151struct vivi_dmaqueue {
152 struct list_head active;
153 struct list_head queued;
154 struct timer_list timeout;
155
156 /* thread for generating video stream*/
157 struct task_struct *kthread;
158 wait_queue_head_t wq;
159 /* Counters to control fps rate */
160 int frame;
161 int ini_jiffies;
162};
163
164static LIST_HEAD(vivi_devlist);
165
166struct vivi_dev {
167 struct list_head vivi_devlist;
168
51b54029 169 struct mutex lock;
1e6dd65e
MCC		 170
171 int users;
172
173 /* various device info */
174 unsigned int resources;
c820cc45 175 struct video_device vfd;
1e6dd65e
MCC		 176
177 struct vivi_dmaqueue vidq;
178
179 /* Several counters */
180 int h,m,s,us,jiffies;
181 char timestr[13];
182};
183
184struct vivi_fh {
185 struct vivi_dev *dev;
186
187 /* video capture */
188 struct vivi_fmt *fmt;
189 unsigned int width,height;
190 struct videobuf_queue vb_vidq;
191
192 enum v4l2_buf_type type;
193};
194
195/* ------------------------------------------------------------------
196 DMA and thread functions
197 ------------------------------------------------------------------*/
198
199/* Bars and Colors should match positions */
200
201enum colors {
202 WHITE,
203 AMBAR,
204 CYAN,
205 GREEN,
206 MAGENTA,
207 RED,
208 BLUE
209};
210
211static u8 bars[8][3] = {
212 /* R G B */
213 {204,204,204}, /* white */
214 {208,208, 0}, /* ambar */
215 { 0,206,206}, /* cyan */
216 { 0,239, 0}, /* green */
217 {239, 0,239}, /* magenta */
218 {205, 0, 0}, /* red */
219 { 0, 0,255}, /* blue */
220 { 0, 0, 0}
221};
222
223#define TO_Y(r,g,b) (((16829*r +33039*g +6416*b + 32768)>>16)+16)
224/* RGB to V(Cr) Color transform */
225#define TO_V(r,g,b) (((28784*r -24103*g -4681*b + 32768)>>16)+128)
226/* RGB to U(Cb) Color transform */
227#define TO_U(r,g,b) (((-9714*r -19070*g +28784*b + 32768)>>16)+128)
228
229#define TSTAMP_MIN_Y 24
230#define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
231#define TSTAMP_MIN_X 64
232
1e6dd65e 233
b50e7fe9
MCC		 234static void gen_line(char *basep,int inipos,int wmax,
235 int hmax, int line, char *timestr)
1e6dd65e 236{
b50e7fe9
MCC		 237 int w,i,j,pos=inipos,y;
238 char *p,*s;
1e6dd65e 239 u8 chr,r,g,b,color;
1e6dd65e
MCC		 240
241 /* We will just duplicate the second pixel at the packet */
242 wmax/=2;
243
244 /* Generate a standard color bar pattern */
245 for (w=0;w<wmax;w++) {
246 r=bars[w*7/wmax][0];
247 g=bars[w*7/wmax][1];
248 b=bars[w*7/wmax][2];
249
250 for (color=0;color<4;color++) {
b50e7fe9 251 p=basep+pos;
1e6dd65e
MCC		 252
253 switch (color) {
254 case 0:
255 case 2:
256 *p=TO_Y(r,g,b); /* Luminance */
257 break;
258 case 1:
259 *p=TO_U(r,g,b); /* Cb */
260 break;
261 case 3:
262 *p=TO_V(r,g,b); /* Cr */
263 break;
264 }
265 pos++;
266 }
267 }
268
269 /* Checks if it is possible to show timestamp */
270 if (TSTAMP_MAX_Y>=hmax)
271 goto end;
272 if (TSTAMP_MIN_X+strlen(timestr)>=wmax)
273 goto end;
274
275 /* Print stream time */
276 if (line>=TSTAMP_MIN_Y && line<=TSTAMP_MAX_Y) {
277 j=TSTAMP_MIN_X;
278 for (s=timestr;*s;s++) {
279 chr=rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
280 for (i=0;i<7;i++) {
281 if (chr&1<<(7-i)) { /* Font color*/
282 r=bars[BLUE][0];
283 g=bars[BLUE][1];
284 b=bars[BLUE][2];
285 r=g=b=0;
286 g=198;
287 } else { /* Background color */
288 r=bars[WHITE][0];
289 g=bars[WHITE][1];
290 b=bars[WHITE][2];
291 r=g=b=0;
292 }
293
294 pos=inipos+j*2;
295 for (color=0;color<4;color++) {
b50e7fe9 296 p=basep+pos;
1e6dd65e
MCC		 297
298 y=TO_Y(r,g,b);
299
300 switch (color) {
301 case 0:
302 case 2:
303 *p=TO_Y(r,g,b); /* Luminance */
304 break;
305 case 1:
306 *p=TO_U(r,g,b); /* Cb */
307 break;
308 case 3:
309 *p=TO_V(r,g,b); /* Cr */
310 break;
311 }
312 pos++;
313 }
314 j++;
315 }
316 }
317 }
318
319
320end:
b50e7fe9 321 return;
1e6dd65e
MCC		 322}
323static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf)
324{
325 int h,pos=0;
326 int hmax = buf->vb.height;
327 int wmax = buf->vb.width;
1e6dd65e 328 struct timeval ts;
b50e7fe9 329 char *tmpbuf;
1e6dd65e 330
b50e7fe9
MCC		 331 if (buf->vb.dma.varea) {
332 tmpbuf=kmalloc (wmax*2, GFP_KERNEL);
333 } else {
334 tmpbuf=buf->vb.dma.vmalloc;
335 }
336
1e6dd65e
MCC		 337
338 for (h=0;h<hmax;h++) {
b50e7fe9
MCC		 339 if (buf->vb.dma.varea) {
340 gen_line(tmpbuf,0,wmax,hmax,h,dev->timestr);
341 /* FIXME: replacing to __copy_to_user */
4acf2670
MS		 342 if (copy_to_user(buf->vb.dma.varea+pos,tmpbuf,wmax*2)!=0)
343 dprintk(2,"vivifill copy_to_user failed.\n");
b50e7fe9
MCC		 344 } else {
345 gen_line(tmpbuf,pos,wmax,hmax,h,dev->timestr);
346 }
1e6dd65e
MCC		 347 pos += wmax*2;
348 }
349
350 /* Updates stream time */
351
352 dev->us+=jiffies_to_usecs(jiffies-dev->jiffies);
353 dev->jiffies=jiffies;
354 if (dev->us>=1000000) {
355 dev->us-=1000000;
356 dev->s++;
357 if (dev->s>=60) {
358 dev->s-=60;
359 dev->m++;
360 if (dev->m>60) {
361 dev->m-=60;
362 dev->h++;
363 if (dev->h>24)
364 dev->h-=24;
365 }
366 }
367 }
368 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
369 dev->h,dev->m,dev->s,(dev->us+500)/1000);
370
371 dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr,
b50e7fe9 372 (unsigned long)buf->vb.dma.varea,pos);
1e6dd65e
MCC		 373
374 /* Advice that buffer was filled */
375 buf->vb.state = STATE_DONE;
376 buf->vb.field_count++;
377 do_gettimeofday(&ts);
378 buf->vb.ts = ts;
379
380 list_del(&buf->vb.queue);
381 wake_up(&buf->vb.done);
382}
383
384static int restart_video_queue(struct vivi_dmaqueue *dma_q);
385
386static void vivi_thread_tick(struct vivi_dmaqueue *dma_q)
387{
388 struct vivi_buffer *buf;
389 struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq);
390
391 int bc;
392
393 /* Announces videobuf that all went ok */
394 for (bc = 0;; bc++) {
395 if (list_empty(&dma_q->active)) {
396 dprintk(1,"No active queue to serve\n");
397 break;
398 }
399
400 buf = list_entry(dma_q->active.next,
401 struct vivi_buffer, vb.queue);
402
403 /* Nobody is waiting something to be done, just return */
404 if (!waitqueue_active(&buf->vb.done)) {
405 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
406 return;
407 }
408
409 do_gettimeofday(&buf->vb.ts);
410 dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i);
411
412 /* Fill buffer */
413 vivi_fillbuff(dev,buf);
0b600512
MCC		 414
415 if (list_empty(&dma_q->active)) {
416 del_timer(&dma_q->timeout);
417 } else {
418 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
419 }
1e6dd65e
MCC		 420 }
421 if (bc != 1)
422 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc);
423}
424
972c3517 425static void vivi_sleep(struct vivi_dmaqueue *dma_q)
1e6dd65e
MCC		 426{
427 int timeout;
428 DECLARE_WAITQUEUE(wait, current);
429
430 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
431
432 add_wait_queue(&dma_q->wq, &wait);
433 if (!kthread_should_stop()) {
434 dma_q->frame++;
435
436 /* Calculate time to wake up */
437 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
438
439 if (timeout <= 0) {
440 int old=dma_q->frame;
441 dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1;
442
443 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
444
445 dprintk(1,"underrun, losed %d frames. "
446 "Now, frame is %d. Waking on %d jiffies\n",
447 dma_q->frame-old,dma_q->frame,timeout);
448 } else
449 dprintk(1,"will sleep for %i jiffies\n",timeout);
450
451 vivi_thread_tick(dma_q);
452
453 schedule_timeout_interruptible (timeout);
454 }
455
456 remove_wait_queue(&dma_q->wq, &wait);
457 try_to_freeze();
458}
459
972c3517 460static int vivi_thread(void *data)
1e6dd65e
MCC		 461{
462 struct vivi_dmaqueue *dma_q=data;
463
464 dprintk(1,"thread started\n");
465
0b600512 466 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
83144186 467 set_freezable();
0b600512 468
1e6dd65e
MCC		 469 for (;;) {
470 vivi_sleep(dma_q);
471
472 if (kthread_should_stop())
473 break;
474 }
475 dprintk(1, "thread: exit\n");
476 return 0;
477}
478
972c3517 479static int vivi_start_thread(struct vivi_dmaqueue *dma_q)
1e6dd65e
MCC		 480{
481 dma_q->frame=0;
482 dma_q->ini_jiffies=jiffies;
483
484 dprintk(1,"%s\n",__FUNCTION__);
1e6dd65e
MCC		 485
486 dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
487
054afee4 488 if (IS_ERR(dma_q->kthread)) {
1e6dd65e 489 printk(KERN_ERR "vivi: kernel_thread() failed\n");
054afee4 490 return PTR_ERR(dma_q->kthread);
1e6dd65e 491 }
0b600512
MCC		 492 /* Wakes thread */
493 wake_up_interruptible(&dma_q->wq);
494
1e6dd65e
MCC		 495 dprintk(1,"returning from %s\n",__FUNCTION__);
496 return 0;
497}
498
972c3517 499static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
1e6dd65e
MCC		 500{
501 dprintk(1,"%s\n",__FUNCTION__);
502 /* shutdown control thread */
503 if (dma_q->kthread) {
504 kthread_stop(dma_q->kthread);
505 dma_q->kthread=NULL;
506 }
507}
508
509static int restart_video_queue(struct vivi_dmaqueue *dma_q)
510{
511 struct vivi_buffer *buf, *prev;
512 struct list_head *item;
513
514 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
515
516 if (!list_empty(&dma_q->active)) {
517 buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
518 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
519 buf, buf->vb.i);
520
521 dprintk(1,"Restarting video dma\n");
522 vivi_stop_thread(dma_q);
523// vivi_start_thread(dma_q);
524
525 /* cancel all outstanding capture / vbi requests */
526 list_for_each(item,&dma_q->active) {
527 buf = list_entry(item, struct vivi_buffer, vb.queue);
528
529 list_del(&buf->vb.queue);
530 buf->vb.state = STATE_ERROR;
531 wake_up(&buf->vb.done);
532 }
533 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
534
535 return 0;
536 }
537
538 prev = NULL;
539 for (;;) {
540 if (list_empty(&dma_q->queued))
541 return 0;
542 buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
543 if (NULL == prev) {
544 list_del(&buf->vb.queue);
545 list_add_tail(&buf->vb.queue,&dma_q->active);
546
547 dprintk(1,"Restarting video dma\n");
548 vivi_stop_thread(dma_q);
549 vivi_start_thread(dma_q);
550
551 buf->vb.state = STATE_ACTIVE;
552 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
553 dprintk(2,"[%p/%d] restart_queue - first active\n",
554 buf,buf->vb.i);
555
556 } else if (prev->vb.width == buf->vb.width &&
557 prev->vb.height == buf->vb.height &&
558 prev->fmt == buf->fmt) {
559 list_del(&buf->vb.queue);
560 list_add_tail(&buf->vb.queue,&dma_q->active);
561 buf->vb.state = STATE_ACTIVE;
562 dprintk(2,"[%p/%d] restart_queue - move to active\n",
563 buf,buf->vb.i);
564 } else {
565 return 0;
566 }
567 prev = buf;
568 }
569}
570
571static void vivi_vid_timeout(unsigned long data)
572{
573 struct vivi_dev *dev = (struct vivi_dev*)data;
574 struct vivi_dmaqueue *vidq = &dev->vidq;
575 struct vivi_buffer *buf;
576
577 while (!list_empty(&vidq->active)) {
578 buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
579 list_del(&buf->vb.queue);
580 buf->vb.state = STATE_ERROR;
581 wake_up(&buf->vb.done);
582 printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
583 }
584
585 restart_video_queue(vidq);
586}
587
588/* ------------------------------------------------------------------
589 Videobuf operations
590 ------------------------------------------------------------------*/
591static int
592buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
593{
594 struct vivi_fh *fh = vq->priv_data;
595
596 *size = fh->width*fh->height*2;
597
598 if (0 == *count)
599 *count = 32;
600 while (*size * *count > vid_limit * 1024 * 1024)
601 (*count)--;
602 return 0;
603}
604
972c3517 605static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
1e6dd65e
MCC		 606{
607 dprintk(1,"%s\n",__FUNCTION__);
608
609 if (in_interrupt())
610 BUG();
611
1e6dd65e
MCC		 612
613 videobuf_waiton(&buf->vb,0,0);
614 videobuf_dma_unmap(vq, &buf->vb.dma);
615 videobuf_dma_free(&buf->vb.dma);
616 buf->vb.state = STATE_NEEDS_INIT;
617}
618
619#define norm_maxw() 1024
620#define norm_maxh() 768
621static int
622buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
623 enum v4l2_field field)
624{
625 struct vivi_fh *fh = vq->priv_data;
626 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
627 int rc, init_buffer = 0;
628
629// dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
630
631 BUG_ON(NULL == fh->fmt);
632 if (fh->width < 48 || fh->width > norm_maxw() ||
633 fh->height < 32 || fh->height > norm_maxh())
634 return -EINVAL;
635 buf->vb.size = fh->width*fh->height*2;
636 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
637 return -EINVAL;
638
639 if (buf->fmt != fh->fmt ||
640 buf->vb.width != fh->width ||
641 buf->vb.height != fh->height ||
642 buf->vb.field != field) {
643 buf->fmt = fh->fmt;
644 buf->vb.width = fh->width;
645 buf->vb.height = fh->height;
646 buf->vb.field = field;
647 init_buffer = 1;
648 }
649
650 if (STATE_NEEDS_INIT == buf->vb.state) {
651 if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
652 goto fail;
653 }
654
655 buf->vb.state = STATE_PREPARED;
656
1e6dd65e
MCC		 657 return 0;
658
659fail:
660 free_buffer(vq,buf);
661 return rc;
662}
663
664static void
665buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
666{
667 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
668 struct vivi_fh *fh = vq->priv_data;
669 struct vivi_dev *dev = fh->dev;
670 struct vivi_dmaqueue *vidq = &dev->vidq;
671 struct vivi_buffer *prev;
672
673 if (!list_empty(&vidq->queued)) {
674 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
675 list_add_tail(&buf->vb.queue,&vidq->queued);
676 buf->vb.state = STATE_QUEUED;
677 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
678 buf, buf->vb.i);
679 } else if (list_empty(&vidq->active)) {
680 list_add_tail(&buf->vb.queue,&vidq->active);
681
682 buf->vb.state = STATE_ACTIVE;
683 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
684 dprintk(2,"[%p/%d] buffer_queue - first active\n",
685 buf, buf->vb.i);
686
687 vivi_start_thread(vidq);
688 } else {
689 prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
690 if (prev->vb.width == buf->vb.width &&
691 prev->vb.height == buf->vb.height &&
692 prev->fmt == buf->fmt) {
693 list_add_tail(&buf->vb.queue,&vidq->active);
694 buf->vb.state = STATE_ACTIVE;
695 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
696 buf, buf->vb.i);
697
698 } else {
699 list_add_tail(&buf->vb.queue,&vidq->queued);
700 buf->vb.state = STATE_QUEUED;
701 dprintk(2,"[%p/%d] buffer_queue - first queued\n",
702 buf, buf->vb.i);
703 }
704 }
705}
706
707static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
708{
709 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
710 struct vivi_fh *fh = vq->priv_data;
711 struct vivi_dev *dev = (struct vivi_dev*)fh->dev;
712 struct vivi_dmaqueue *vidq = &dev->vidq;
713
714 dprintk(1,"%s\n",__FUNCTION__);
715
716 vivi_stop_thread(vidq);
717
718 free_buffer(vq,buf);
719}
720
1e6dd65e
MCC		 721
722static struct videobuf_queue_ops vivi_video_qops = {
723 .buf_setup = buffer_setup,
724 .buf_prepare = buffer_prepare,
725 .buf_queue = buffer_queue,
726 .buf_release = buffer_release,
727
728 /* Non-pci handling routines */
b50e7fe9
MCC		 729// .vb_map_sg = vivi_map_sg,
730// .vb_dma_sync_sg = vivi_dma_sync_sg,
731// .vb_unmap_sg = vivi_unmap_sg,
1e6dd65e
MCC		 732};
733
734/* ------------------------------------------------------------------
735 IOCTL handling
736 ------------------------------------------------------------------*/
737
c820cc45
MCC		 738
739static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
740{
741 /* is it free? */
51b54029 742 mutex_lock(&dev->lock);
c820cc45
MCC		 743 if (dev->resources) {
744 /* no, someone else uses it */
51b54029 745 mutex_unlock(&dev->lock);
c820cc45
MCC		 746 return 0;
747 }
748 /* it's free, grab it */
749 dev->resources =1;
750 dprintk(1,"res: get\n");
51b54029 751 mutex_unlock(&dev->lock);
c820cc45
MCC		 752 return 1;
753}
754
755static int res_locked(struct vivi_dev *dev)
756{
757 return (dev->resources);
758}
759
760static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
761{
51b54029 762 mutex_lock(&dev->lock);
c820cc45
MCC		 763 dev->resources = 0;
764 dprintk(1,"res: put\n");
51b54029 765 mutex_lock(&dev->lock);
c820cc45
MCC		 766}
767
768/* ------------------------------------------------------------------
769 IOCTL vidioc handling
770 ------------------------------------------------------------------*/
771static int vidioc_querycap (struct file *file, void *priv,
772 struct v4l2_capability *cap)
773{
774 strcpy(cap->driver, "vivi");
775 strcpy(cap->card, "vivi");
776 cap->version = VIVI_VERSION;
777 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
778 V4L2_CAP_STREAMING |
779 V4L2_CAP_READWRITE;
780 return 0;
781}
782
783static int vidioc_enum_fmt_cap (struct file *file, void *priv,
784 struct v4l2_fmtdesc *f)
785{
786 if (f->index > 0)
787 return -EINVAL;
788
789 strlcpy(f->description,format.name,sizeof(f->description));
790 f->pixelformat = format.fourcc;
791 return 0;
792}
793
794static int vidioc_g_fmt_cap (struct file *file, void *priv,
795 struct v4l2_format *f)
796{
797 struct vivi_fh *fh=priv;
798
799 f->fmt.pix.width = fh->width;
800 f->fmt.pix.height = fh->height;
801 f->fmt.pix.field = fh->vb_vidq.field;
802 f->fmt.pix.pixelformat = fh->fmt->fourcc;
803 f->fmt.pix.bytesperline =
804 (f->fmt.pix.width * fh->fmt->depth) >> 3;
805 f->fmt.pix.sizeimage =
806 f->fmt.pix.height * f->fmt.pix.bytesperline;
807
808 return (0);
809}
810
811static int vidioc_try_fmt_cap (struct file *file, void *priv,
1e6dd65e
MCC		 812 struct v4l2_format *f)
813{
814 struct vivi_fmt *fmt;
815 enum v4l2_field field;
816 unsigned int maxw, maxh;
817
818 if (format.fourcc != f->fmt.pix.pixelformat) {
c820cc45
MCC		 819 dprintk(1,"Fourcc format (0x%08x) invalid. Driver accepts "
820 "only 0x%08x\n",f->fmt.pix.pixelformat,format.fourcc);
1e6dd65e
MCC		 821 return -EINVAL;
822 }
823 fmt=&format;
824
825 field = f->fmt.pix.field;
826
827 if (field == V4L2_FIELD_ANY) {
828// field=V4L2_FIELD_INTERLACED;
829 field=V4L2_FIELD_SEQ_TB;
830 } else if (V4L2_FIELD_INTERLACED != field) {
831 dprintk(1,"Field type invalid.\n");
832 return -EINVAL;
833 }
834
835 maxw = norm_maxw();
836 maxh = norm_maxh();
837
838 f->fmt.pix.field = field;
839 if (f->fmt.pix.height < 32)
840 f->fmt.pix.height = 32;
841 if (f->fmt.pix.height > maxh)
842 f->fmt.pix.height = maxh;
843 if (f->fmt.pix.width < 48)
844 f->fmt.pix.width = 48;
845 if (f->fmt.pix.width > maxw)
846 f->fmt.pix.width = maxw;
847 f->fmt.pix.width &= ~0x03;
848 f->fmt.pix.bytesperline =
849 (f->fmt.pix.width * fmt->depth) >> 3;
850 f->fmt.pix.sizeimage =
851 f->fmt.pix.height * f->fmt.pix.bytesperline;
852
853 return 0;
854}
855
c820cc45
MCC		 856/*FIXME: This seems to be generic enough to be at videodev2 */
857static int vidioc_s_fmt_cap (struct file *file, void *priv,
858 struct v4l2_format *f)
1e6dd65e 859{
c820cc45
MCC		 860 struct vivi_fh *fh=priv;
861 int ret = vidioc_try_fmt_cap(file,fh,f);
862 if (ret < 0)
863 return (ret);
864
865 fh->fmt = &format;
866 fh->width = f->fmt.pix.width;
867 fh->height = f->fmt.pix.height;
868 fh->vb_vidq.field = f->fmt.pix.field;
869 fh->type = f->type;
870
871 return (0);
1e6dd65e
MCC		 872}
873
c820cc45 874static int vidioc_reqbufs (struct file *file, void *priv, struct v4l2_requestbuffers *p)
1e6dd65e 875{
c820cc45 876 struct vivi_fh *fh=priv;
1e6dd65e 877
c820cc45 878 return (videobuf_reqbufs(&fh->vb_vidq, p));
1e6dd65e
MCC		 879}
880
c820cc45 881static int vidioc_querybuf (struct file *file, void *priv, struct v4l2_buffer *p)
1e6dd65e 882{
c820cc45 883 struct vivi_fh *fh=priv;
1e6dd65e 884
c820cc45
MCC		 885 return (videobuf_querybuf(&fh->vb_vidq, p));
886}
1e6dd65e 887
c820cc45
MCC		 888static int vidioc_qbuf (struct file *file, void *priv, struct v4l2_buffer *p)
889{
890 struct vivi_fh *fh=priv;
1e6dd65e 891
c820cc45
MCC		 892 return (videobuf_qbuf(&fh->vb_vidq, p));
893}
1e6dd65e 894
c820cc45
MCC		 895static int vidioc_dqbuf (struct file *file, void *priv, struct v4l2_buffer *p)
896{
897 struct vivi_fh *fh=priv;
1e6dd65e 898
c820cc45
MCC		 899 return (videobuf_dqbuf(&fh->vb_vidq, p,
900 file->f_flags & O_NONBLOCK));
901}
1e6dd65e 902
0dfa9abd 903#ifdef CONFIG_VIDEO_V4L1_COMPAT
c820cc45
MCC		 904static int vidiocgmbuf (struct file *file, void *priv, struct video_mbuf *mbuf)
905{
906 struct vivi_fh *fh=priv;
907 struct videobuf_queue *q=&fh->vb_vidq;
908 struct v4l2_requestbuffers req;
d084aa70
ES		 909 unsigned int i;
910 int ret;
c820cc45
MCC		 911
912 req.type = q->type;
913 req.count = 8;
914 req.memory = V4L2_MEMORY_MMAP;
915 ret = videobuf_reqbufs(q,&req);
916 if (ret < 0)
917 return (ret);
4ceb04e1 918
c820cc45
MCC		 919 mbuf->frames = req.count;
920 mbuf->size = 0;
921 for (i = 0; i < mbuf->frames; i++) {
922 mbuf->offsets[i] = q->bufs[i]->boff;
923 mbuf->size += q->bufs[i]->bsize;
1e6dd65e 924 }
c820cc45
MCC		 925 return (0);
926}
927#endif
1e6dd65e 928
dc46ace1 929static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
c820cc45
MCC		 930{
931 struct vivi_fh *fh=priv;
932 struct vivi_dev *dev = fh->dev;
1e6dd65e 933
c820cc45
MCC		 934 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
935 return -EINVAL;
936 if (i != fh->type)
937 return -EINVAL;
1e6dd65e 938
c820cc45
MCC		 939 if (!res_get(dev,fh))
940 return -EBUSY;
941 return (videobuf_streamon(&fh->vb_vidq));
942}
1e6dd65e 943
dc46ace1 944static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
c820cc45
MCC		 945{
946 struct vivi_fh *fh=priv;
947 struct vivi_dev *dev = fh->dev;
1e6dd65e 948
c820cc45
MCC		 949 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
950 return -EINVAL;
951 if (i != fh->type)
952 return -EINVAL;
1e6dd65e 953
c820cc45
MCC		 954 videobuf_streamoff(&fh->vb_vidq);
955 res_free(dev,fh);
1e6dd65e 956
c820cc45
MCC		 957 return (0);
958}
959
e75f9cee 960static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id *i)
c820cc45 961{
c820cc45
MCC		 962 return 0;
963}
1e6dd65e 964
c820cc45
MCC		 965/* only one input in this sample driver */
966static int vidioc_enum_input (struct file *file, void *priv,
967 struct v4l2_input *inp)
968{
969 if (inp->index != 0)
970 return -EINVAL;
1e6dd65e 971
c820cc45
MCC		 972 inp->type = V4L2_INPUT_TYPE_CAMERA;
973 inp->std = V4L2_STD_NTSC_M;
974 strcpy(inp->name,"Camera");
1e6dd65e 975
c820cc45
MCC		 976 return (0);
977}
1e6dd65e 978
c820cc45
MCC		 979static int vidioc_g_input (struct file *file, void *priv, unsigned int *i)
980{
981 *i = 0;
1e6dd65e 982
c820cc45
MCC		 983 return (0);
984}
985static int vidioc_s_input (struct file *file, void *priv, unsigned int i)
986{
987 if (i > 0)
988 return -EINVAL;
1e6dd65e 989
c820cc45
MCC		 990 return (0);
991}
1e6dd65e
MCC		 992
993 /* --- controls ---------------------------------------------- */
c820cc45
MCC		 994static int vidioc_queryctrl (struct file *file, void *priv,
995 struct v4l2_queryctrl *qc)
996{
997 int i;
1e6dd65e 998
c820cc45
MCC		 999 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1000 if (qc->id && qc->id == vivi_qctrl[i].id) {
1001 memcpy(qc, &(vivi_qctrl[i]),
1002 sizeof(*qc));
1003 return (0);
1004 }
1e6dd65e 1005
c820cc45
MCC		 1006 return -EINVAL;
1007}
1e6dd65e 1008
c820cc45
MCC		 1009static int vidioc_g_ctrl (struct file *file, void *priv,
1010 struct v4l2_control *ctrl)
1011{
1012 int i;
1e6dd65e 1013
c820cc45
MCC		 1014 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1015 if (ctrl->id == vivi_qctrl[i].id) {
1016 ctrl->value=qctl_regs[i];
1017 return (0);
1018 }
1e6dd65e 1019
c820cc45 1020 return -EINVAL;
1e6dd65e 1021}
c820cc45
MCC		 1022static int vidioc_s_ctrl (struct file *file, void *priv,
1023 struct v4l2_control *ctrl)
1e6dd65e 1024{
c820cc45
MCC		 1025 int i;
1026
1027 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1028 if (ctrl->id == vivi_qctrl[i].id) {
1029 if (ctrl->value <
1030 vivi_qctrl[i].minimum
1031 || ctrl->value >
1032 vivi_qctrl[i].maximum) {
1033 return (-ERANGE);
1034 }
1035 qctl_regs[i]=ctrl->value;
1036 return (0);
1037 }
1038 return -EINVAL;
1e6dd65e
MCC		 1039}
1040
1041/* ------------------------------------------------------------------
1042 File operations for the device
1043 ------------------------------------------------------------------*/
1044
1045#define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1046
1047static int vivi_open(struct inode *inode, struct file *file)
1048{
1049 int minor = iminor(inode);
1050 struct vivi_dev *h,*dev = NULL;
1051 struct vivi_fh *fh;
1052 struct list_head *list;
1053 enum v4l2_buf_type type = 0;
1054 int i;
1055
1056 printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
1057
1058 list_for_each(list,&vivi_devlist) {
1059 h = list_entry(list, struct vivi_dev, vivi_devlist);
c820cc45 1060 if (h->vfd.minor == minor) {
1e6dd65e
MCC		 1061 dev = h;
1062 type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1063 }
1064 }
1065 if (NULL == dev)
1066 return -ENODEV;
1067
1068
c820cc45 1069
1e6dd65e
MCC		 1070 /* If more than one user, mutex should be added */
1071 dev->users++;
1072
1073 dprintk(1,"open minor=%d type=%s users=%d\n",
1074 minor,v4l2_type_names[type],dev->users);
1075
1076 /* allocate + initialize per filehandle data */
1077 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
1078 if (NULL == fh) {
1079 dev->users--;
1080 return -ENOMEM;
1081 }
1082
1083 file->private_data = fh;
1084 fh->dev = dev;
c820cc45 1085
1e6dd65e
MCC		 1086 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1087 fh->fmt = &format;
1088 fh->width = 640;
1089 fh->height = 480;
1090
1091 /* Put all controls at a sane state */
1092 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1093 qctl_regs[i] =vivi_qctrl[i].default_value;
1094
1095 dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1096 (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
1097 dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued));
1098 dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active));
1099
1100 /* Resets frame counters */
1101 dev->h=0;
1102 dev->m=0;
1103 dev->s=0;
1104 dev->us=0;
1105 dev->jiffies=jiffies;
1106 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
1107 dev->h,dev->m,dev->s,(dev->us+500)/1000);
1108
1109 videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops,
1110 NULL, NULL,
1111 fh->type,
1112 V4L2_FIELD_INTERLACED,
1113 sizeof(struct vivi_buffer),fh);
1114
1115 return 0;
1116}
1117
1118static ssize_t
1119vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1120{
c820cc45 1121 struct vivi_fh *fh = file->private_data;
1e6dd65e
MCC		 1122
1123 if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1124 if (res_locked(fh->dev))
1125 return -EBUSY;
acb09af4 1126 return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0,
1e6dd65e
MCC		 1127 file->f_flags & O_NONBLOCK);
1128 }
1129 return 0;
1130}
1131
1132static unsigned int
1133vivi_poll(struct file *file, struct poll_table_struct *wait)
1134{
c820cc45
MCC		 1135 struct vivi_fh *fh = file->private_data;
1136 struct vivi_buffer *buf;
1e6dd65e
MCC		 1137
1138 dprintk(1,"%s\n",__FUNCTION__);
1139
1140 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1141 return POLLERR;
1142
1143 if (res_get(fh->dev,fh)) {
1144 dprintk(1,"poll: mmap interface\n");
1145 /* streaming capture */
1146 if (list_empty(&fh->vb_vidq.stream))
1147 return POLLERR;
1148 buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream);
1149 } else {
1150 dprintk(1,"poll: read() interface\n");
1151 /* read() capture */
1152 buf = (struct vivi_buffer*)fh->vb_vidq.read_buf;
1153 if (NULL == buf)
1154 return POLLERR;
1155 }
1156 poll_wait(file, &buf->vb.done, wait);
1157 if (buf->vb.state == STATE_DONE ||
1158 buf->vb.state == STATE_ERROR)
1159 return POLLIN|POLLRDNORM;
1160 return 0;
1161}
1162
1163static int vivi_release(struct inode *inode, struct file *file)
1164{
c820cc45
MCC		 1165 struct vivi_fh *fh = file->private_data;
1166 struct vivi_dev *dev = fh->dev;
1e6dd65e
MCC		 1167 struct vivi_dmaqueue *vidq = &dev->vidq;
1168
1169 int minor = iminor(inode);
1170
1171 vivi_stop_thread(vidq);
1172 videobuf_mmap_free(&fh->vb_vidq);
1173
1174 kfree (fh);
1175
1176 dev->users--;
1177
1178 printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users);
1179
1180 return 0;
1181}
1182
1183static int
1184vivi_mmap(struct file *file, struct vm_area_struct * vma)
1185{
c820cc45 1186 struct vivi_fh *fh = file->private_data;
1e6dd65e
MCC		 1187 int ret;
1188
1189 dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma);
1190
1191 ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
1192
1193 dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1194 (unsigned long)vma->vm_start,
1195 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1196 ret);
1197
1198 return ret;
1199}
1200
fa027c2a 1201static const struct file_operations vivi_fops = {
1e6dd65e
MCC		 1202 .owner = THIS_MODULE,
1203 .open = vivi_open,
1204 .release = vivi_release,
1205 .read = vivi_read,
1206 .poll = vivi_poll,
c820cc45 1207 .ioctl = video_ioctl2, /* V4L2 ioctl handler */
1e6dd65e
MCC		 1208 .mmap = vivi_mmap,
1209 .llseek = no_llseek,
1210};
1211
1212static struct video_device vivi = {
c820cc45 1213 .name = "vivi",
1e6dd65e
MCC		 1214 .type = VID_TYPE_CAPTURE,
1215 .hardware = 0,
1216 .fops = &vivi_fops,
1217 .minor = -1,
1218// .release = video_device_release,
c820cc45
MCC		 1219
1220 .vidioc_querycap = vidioc_querycap,
1221 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1222 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1223 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1224 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1225 .vidioc_reqbufs = vidioc_reqbufs,
1226 .vidioc_querybuf = vidioc_querybuf,
1227 .vidioc_qbuf = vidioc_qbuf,
1228 .vidioc_dqbuf = vidioc_dqbuf,
1229 .vidioc_s_std = vidioc_s_std,
1230 .vidioc_enum_input = vidioc_enum_input,
1231 .vidioc_g_input = vidioc_g_input,
1232 .vidioc_s_input = vidioc_s_input,
1233 .vidioc_queryctrl = vidioc_queryctrl,
1234 .vidioc_g_ctrl = vidioc_g_ctrl,
1235 .vidioc_s_ctrl = vidioc_s_ctrl,
1236 .vidioc_streamon = vidioc_streamon,
1237 .vidioc_streamoff = vidioc_streamoff,
0dfa9abd 1238#ifdef CONFIG_VIDEO_V4L1_COMPAT
c820cc45
MCC		 1239 .vidiocgmbuf = vidiocgmbuf,
1240#endif
e75f9cee
MCC		 1241 .tvnorms = V4L2_STD_NTSC_M,
1242 .current_norm = V4L2_STD_NTSC_M,
1e6dd65e 1243};
c820cc45 1244/* -----------------------------------------------------------------
1e6dd65e
MCC		 1245 Initialization and module stuff
1246 ------------------------------------------------------------------*/
1247
1248static int __init vivi_init(void)
1249{
1250 int ret;
1251 struct vivi_dev *dev;
1252
1253 dev = kzalloc(sizeof(*dev),GFP_KERNEL);
1254 if (NULL == dev)
1255 return -ENOMEM;
1256 list_add_tail(&dev->vivi_devlist,&vivi_devlist);
1257
1258 /* init video dma queues */
1259 INIT_LIST_HEAD(&dev->vidq.active);
1260 INIT_LIST_HEAD(&dev->vidq.queued);
df3a7104 1261 init_waitqueue_head(&dev->vidq.wq);
1e6dd65e
MCC		 1262
1263 /* initialize locks */
51b54029 1264 mutex_init(&dev->lock);
1e6dd65e
MCC		 1265
1266 dev->vidq.timeout.function = vivi_vid_timeout;
1267 dev->vidq.timeout.data = (unsigned long)dev;
1268 init_timer(&dev->vidq.timeout);
1269
1270 ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
1271 printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
1272 return ret;
1273}
1274
1275static void __exit vivi_exit(void)
1276{
1277 struct vivi_dev *h;
1278 struct list_head *list;
1279
72f678c3
AM		 1280 while (!list_empty(&vivi_devlist)) {
1281 list = vivi_devlist.next;
1282 list_del(list);
1e6dd65e
MCC		 1283 h = list_entry(list, struct vivi_dev, vivi_devlist);
1284 kfree (h);
1285 }
1286 video_unregister_device(&vivi);
1287}
1288
1289module_init(vivi_init);
1290module_exit(vivi_exit);
c820cc45
MCC		 1291
1292MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1293MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1294MODULE_LICENSE("Dual BSD/GPL");
1295
1296module_param(video_nr, int, 0);
1297
1298module_param_named(debug,vivi.debug, int, 0644);
1299MODULE_PARM_DESC(debug,"activates debug info");
1300
1301module_param(vid_limit,int,0644);
1302MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
1303
Linux kernel - Deliverables
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