tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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>
28#include <linux/videodev2.h>
29#include <linux/interrupt.h>
30#include <media/video-buf.h>
31#include <media/v4l2-common.h>
32#include <linux/kthread.h>
33#include <linux/highmem.h>
34
35/* Wake up at about 30 fps */
36#define WAKE_NUMERATOR 30
37#define WAKE_DENOMINATOR 1001
38#define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
39
40/* These timers are for 1 fps - used only for testing */
41//#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
42//#define BUFFER_TIMEOUT msecs_to_jiffies(5000) /* 5 seconds */
43
44#include "font.h"
45
46#ifndef kzalloc
47#define kzalloc(size, flags) \
48({ \
49 void *__ret = kmalloc(size, flags); \
50 if (__ret) \
51 memset(__ret, 0, size); \
52 __ret; \
53})
54#endif
55
56MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
57MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
58MODULE_LICENSE("Dual BSD/GPL");
59
60#define VIVI_MAJOR_VERSION 0
61#define VIVI_MINOR_VERSION 4
62#define VIVI_RELEASE 0
63#define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
64
65static int video_nr = -1; /* /dev/videoN, -1 for autodetect */
66module_param(video_nr, int, 0);
67
68static int debug = 0;
69module_param(debug, int, 0);
70
71static unsigned int vid_limit = 16;
72module_param(vid_limit,int,0644);
73MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
74
75/* supported controls */
76static struct v4l2_queryctrl vivi_qctrl[] = {
77 {
78 .id = V4L2_CID_AUDIO_VOLUME,
79 .name = "Volume",
80 .minimum = 0,
81 .maximum = 65535,
82 .step = 65535/100,
83 .default_value = 65535,
84 .flags = 0,
85 .type = V4L2_CTRL_TYPE_INTEGER,
86 },{
87 .id = V4L2_CID_BRIGHTNESS,
88 .type = V4L2_CTRL_TYPE_INTEGER,
89 .name = "Brightness",
90 .minimum = 0,
91 .maximum = 255,
92 .step = 1,
93 .default_value = 127,
94 .flags = 0,
95 }, {
96 .id = V4L2_CID_CONTRAST,
97 .type = V4L2_CTRL_TYPE_INTEGER,
98 .name = "Contrast",
99 .minimum = 0,
100 .maximum = 255,
101 .step = 0x1,
102 .default_value = 0x10,
103 .flags = 0,
104 }, {
105 .id = V4L2_CID_SATURATION,
106 .type = V4L2_CTRL_TYPE_INTEGER,
107 .name = "Saturation",
108 .minimum = 0,
109 .maximum = 255,
110 .step = 0x1,
111 .default_value = 127,
112 .flags = 0,
113 }, {
114 .id = V4L2_CID_HUE,
115 .type = V4L2_CTRL_TYPE_INTEGER,
116 .name = "Hue",
117 .minimum = -128,
118 .maximum = 127,
119 .step = 0x1,
120 .default_value = 0,
121 .flags = 0,
122 }
123};
124
125static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
126
127#define dprintk(level,fmt, arg...) \
128 do { \
129 if (debug >= (level)) \
130 printk(KERN_DEBUG "vivi: " fmt , ## arg); \
131 } while (0)
132
133/* ------------------------------------------------------------------
134 Basic structures
135 ------------------------------------------------------------------*/
136
137struct vivi_fmt {
138 char *name;
139 u32 fourcc; /* v4l2 format id */
140 int depth;
141};
142
143static struct vivi_fmt format = {
144 .name = "4:2:2, packed, YUYV",
145 .fourcc = V4L2_PIX_FMT_YUYV,
146 .depth = 16,
147};
148
149struct sg_to_addr {
150 int pos;
151 struct scatterlist *sg;
152};
153
154/* buffer for one video frame */
155struct vivi_buffer {
156 /* common v4l buffer stuff -- must be first */
157 struct videobuf_buffer vb;
158
159 struct vivi_fmt *fmt;
160
161 struct sg_to_addr *to_addr;
162};
163
164struct vivi_dmaqueue {
165 struct list_head active;
166 struct list_head queued;
167 struct timer_list timeout;
168
169 /* thread for generating video stream*/
170 struct task_struct *kthread;
171 wait_queue_head_t wq;
172 /* Counters to control fps rate */
173 int frame;
174 int ini_jiffies;
175};
176
177static LIST_HEAD(vivi_devlist);
178
179struct vivi_dev {
180 struct list_head vivi_devlist;
181
182 struct semaphore lock;
183
184 int users;
185
186 /* various device info */
187 unsigned int resources;
188 struct video_device video_dev;
189
190 struct vivi_dmaqueue vidq;
191
192 /* Several counters */
193 int h,m,s,us,jiffies;
194 char timestr[13];
195};
196
197struct vivi_fh {
198 struct vivi_dev *dev;
199
200 /* video capture */
201 struct vivi_fmt *fmt;
202 unsigned int width,height;
203 struct videobuf_queue vb_vidq;
204
205 enum v4l2_buf_type type;
206};
207
208/* ------------------------------------------------------------------
209 DMA and thread functions
210 ------------------------------------------------------------------*/
211
212/* Bars and Colors should match positions */
213
214enum colors {
215 WHITE,
216 AMBAR,
217 CYAN,
218 GREEN,
219 MAGENTA,
220 RED,
221 BLUE
222};
223
224static u8 bars[8][3] = {
225 /* R G B */
226 {204,204,204}, /* white */
227 {208,208, 0}, /* ambar */
228 { 0,206,206}, /* cyan */
229 { 0,239, 0}, /* green */
230 {239, 0,239}, /* magenta */
231 {205, 0, 0}, /* red */
232 { 0, 0,255}, /* blue */
233 { 0, 0, 0}
234};
235
236#define TO_Y(r,g,b) (((16829*r +33039*g +6416*b + 32768)>>16)+16)
237/* RGB to V(Cr) Color transform */
238#define TO_V(r,g,b) (((28784*r -24103*g -4681*b + 32768)>>16)+128)
239/* RGB to U(Cb) Color transform */
240#define TO_U(r,g,b) (((-9714*r -19070*g +28784*b + 32768)>>16)+128)
241
242#define TSTAMP_MIN_Y 24
243#define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
244#define TSTAMP_MIN_X 64
245
246void prep_to_addr(struct sg_to_addr to_addr[],struct videobuf_buffer *vb)
247{
248 int i, pos=0;
249
250 for (i=0;i<vb->dma.nr_pages;i++) {
251 to_addr[i].sg=&vb->dma.sglist[i];
252 to_addr[i].pos=pos;
253 pos += vb->dma.sglist[i].length;
254 }
255}
256
257inline int get_addr_pos(int pos, int pages, struct sg_to_addr to_addr[])
258{
259 int p1=0,p2=pages-1,p3=pages/2;
260
261 /* Sanity test */
262 BUG_ON (pos>=to_addr[p2].pos+to_addr[p2].sg->length);
263
264 while (p1+1<p2) {
265 if (pos < to_addr[p3].pos) {
266 p2=p3;
267 } else {
268 p1=p3;
269 }
270 p3=(p1+p2)/2;
271 }
272 if (pos >= to_addr[p2].pos)
273 p1=p2;
274
275 return (p1);
276}
277
278void gen_line(struct sg_to_addr to_addr[],int inipos,int pages,int wmax,
279 int hmax, int line, char *timestr)
280{
281 int w,i,j,pos=inipos,pgpos,oldpg,y;
282 char *p,*s,*basep;
283 struct page *pg;
284 u8 chr,r,g,b,color;
285
286 /* Get first addr pointed to pixel position */
287 oldpg=get_addr_pos(pos,pages,to_addr);
288 pg=pfn_to_page(to_addr[oldpg].sg->dma_address >> PAGE_SHIFT);
289 basep = kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[oldpg].sg->offset;
290
291 /* We will just duplicate the second pixel at the packet */
292 wmax/=2;
293
294 /* Generate a standard color bar pattern */
295 for (w=0;w<wmax;w++) {
296 r=bars[w*7/wmax][0];
297 g=bars[w*7/wmax][1];
298 b=bars[w*7/wmax][2];
299
300 for (color=0;color<4;color++) {
301 pgpos=get_addr_pos(pos,pages,to_addr);
302 if (pgpos!=oldpg) {
303 pg=pfn_to_page(to_addr[pgpos].sg->dma_address >> PAGE_SHIFT);
304 kunmap_atomic(basep, KM_BOUNCE_READ);
305 basep= kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[pgpos].sg->offset;
306 oldpg=pgpos;
307 }
308 p=basep+pos-to_addr[pgpos].pos;
309
310 switch (color) {
311 case 0:
312 case 2:
313 *p=TO_Y(r,g,b); /* Luminance */
314 break;
315 case 1:
316 *p=TO_U(r,g,b); /* Cb */
317 break;
318 case 3:
319 *p=TO_V(r,g,b); /* Cr */
320 break;
321 }
322 pos++;
323 }
324 }
325
326 /* Checks if it is possible to show timestamp */
327 if (TSTAMP_MAX_Y>=hmax)
328 goto end;
329 if (TSTAMP_MIN_X+strlen(timestr)>=wmax)
330 goto end;
331
332 /* Print stream time */
333 if (line>=TSTAMP_MIN_Y && line<=TSTAMP_MAX_Y) {
334 j=TSTAMP_MIN_X;
335 for (s=timestr;*s;s++) {
336 chr=rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
337 for (i=0;i<7;i++) {
338 if (chr&1<<(7-i)) { /* Font color*/
339 r=bars[BLUE][0];
340 g=bars[BLUE][1];
341 b=bars[BLUE][2];
342 r=g=b=0;
343 g=198;
344 } else { /* Background color */
345 r=bars[WHITE][0];
346 g=bars[WHITE][1];
347 b=bars[WHITE][2];
348 r=g=b=0;
349 }
350
351 pos=inipos+j*2;
352 for (color=0;color<4;color++) {
353 pgpos=get_addr_pos(pos,pages,to_addr);
354 if (pgpos!=oldpg) {
355 pg=pfn_to_page(to_addr[pgpos].
356 sg->dma_address
357 >> PAGE_SHIFT);
358 kunmap_atomic(basep,
359 KM_BOUNCE_READ);
360 basep= kmap_atomic(pg,
361 KM_BOUNCE_READ)+
362 to_addr[pgpos].sg->offset;
363 oldpg=pgpos;
364 }
365 p=basep+pos-to_addr[pgpos].pos;
366
367 y=TO_Y(r,g,b);
368
369 switch (color) {
370 case 0:
371 case 2:
372 *p=TO_Y(r,g,b); /* Luminance */
373 break;
374 case 1:
375 *p=TO_U(r,g,b); /* Cb */
376 break;
377 case 3:
378 *p=TO_V(r,g,b); /* Cr */
379 break;
380 }
381 pos++;
382 }
383 j++;
384 }
385 }
386 }
387
388
389end:
390 kunmap_atomic(basep, KM_BOUNCE_READ);
391}
392static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf)
393{
394 int h,pos=0;
395 int hmax = buf->vb.height;
396 int wmax = buf->vb.width;
397 struct videobuf_buffer *vb=&buf->vb;
398 struct sg_to_addr *to_addr=buf->to_addr;
399 struct timeval ts;
400
401 /* Test if DMA mapping is ready */
402 if (!vb->dma.sglist[0].dma_address)
403 return;
404
405 prep_to_addr(to_addr,vb);
406
407 /* Check if there is enough memory */
408 BUG_ON(buf->vb.dma.nr_pages << PAGE_SHIFT < (buf->vb.width*buf->vb.height)*2);
409
410 for (h=0;h<hmax;h++) {
411 gen_line(to_addr,pos,vb->dma.nr_pages,wmax,hmax,h,dev->timestr);
412 pos += wmax*2;
413 }
414
415 /* Updates stream time */
416
417 dev->us+=jiffies_to_usecs(jiffies-dev->jiffies);
418 dev->jiffies=jiffies;
419 if (dev->us>=1000000) {
420 dev->us-=1000000;
421 dev->s++;
422 if (dev->s>=60) {
423 dev->s-=60;
424 dev->m++;
425 if (dev->m>60) {
426 dev->m-=60;
427 dev->h++;
428 if (dev->h>24)
429 dev->h-=24;
430 }
431 }
432 }
433 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
434 dev->h,dev->m,dev->s,(dev->us+500)/1000);
435
436 dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr,
437 (unsigned long)buf->vb.dma.vmalloc,pos);
438
439 /* Advice that buffer was filled */
440 buf->vb.state = STATE_DONE;
441 buf->vb.field_count++;
442 do_gettimeofday(&ts);
443 buf->vb.ts = ts;
444
445 list_del(&buf->vb.queue);
446 wake_up(&buf->vb.done);
447}
448
449static int restart_video_queue(struct vivi_dmaqueue *dma_q);
450
451static void vivi_thread_tick(struct vivi_dmaqueue *dma_q)
452{
453 struct vivi_buffer *buf;
454 struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq);
455
456 int bc;
457
458 /* Announces videobuf that all went ok */
459 for (bc = 0;; bc++) {
460 if (list_empty(&dma_q->active)) {
461 dprintk(1,"No active queue to serve\n");
462 break;
463 }
464
465 buf = list_entry(dma_q->active.next,
466 struct vivi_buffer, vb.queue);
467
468 /* Nobody is waiting something to be done, just return */
469 if (!waitqueue_active(&buf->vb.done)) {
470 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
471 return;
472 }
473
474 do_gettimeofday(&buf->vb.ts);
475 dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i);
476
477 /* Fill buffer */
478 vivi_fillbuff(dev,buf);
479 }
480 if (list_empty(&dma_q->active)) {
481 del_timer(&dma_q->timeout);
482 } else {
483 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
484 }
485 if (bc != 1)
486 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc);
487}
488
489void vivi_sleep(struct vivi_dmaqueue *dma_q)
490{
491 int timeout;
492 DECLARE_WAITQUEUE(wait, current);
493
494 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
495
496 add_wait_queue(&dma_q->wq, &wait);
497 if (!kthread_should_stop()) {
498 dma_q->frame++;
499
500 /* Calculate time to wake up */
501 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
502
503 if (timeout <= 0) {
504 int old=dma_q->frame;
505 dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1;
506
507 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
508
509 dprintk(1,"underrun, losed %d frames. "
510 "Now, frame is %d. Waking on %d jiffies\n",
511 dma_q->frame-old,dma_q->frame,timeout);
512 } else
513 dprintk(1,"will sleep for %i jiffies\n",timeout);
514
515 vivi_thread_tick(dma_q);
516
517 schedule_timeout_interruptible (timeout);
518 }
519
520 remove_wait_queue(&dma_q->wq, &wait);
521 try_to_freeze();
522}
523
524int vivi_thread(void *data)
525{
526 struct vivi_dmaqueue *dma_q=data;
527
528 dprintk(1,"thread started\n");
529
530 for (;;) {
531 vivi_sleep(dma_q);
532
533 if (kthread_should_stop())
534 break;
535 }
536 dprintk(1, "thread: exit\n");
537 return 0;
538}
539
540int vivi_start_thread(struct vivi_dmaqueue *dma_q)
541{
542 dma_q->frame=0;
543 dma_q->ini_jiffies=jiffies;
544
545 dprintk(1,"%s\n",__FUNCTION__);
546 init_waitqueue_head(&dma_q->wq);
547
548 dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
549
550 if (dma_q->kthread == NULL) {
551 printk(KERN_ERR "vivi: kernel_thread() failed\n");
552 return -EINVAL;
553 }
554 dprintk(1,"returning from %s\n",__FUNCTION__);
555 return 0;
556}
557
558void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
559{
560 dprintk(1,"%s\n",__FUNCTION__);
561 /* shutdown control thread */
562 if (dma_q->kthread) {
563 kthread_stop(dma_q->kthread);
564 dma_q->kthread=NULL;
565 }
566}
567
568static int restart_video_queue(struct vivi_dmaqueue *dma_q)
569{
570 struct vivi_buffer *buf, *prev;
571 struct list_head *item;
572
573 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
574
575 if (!list_empty(&dma_q->active)) {
576 buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
577 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
578 buf, buf->vb.i);
579
580 dprintk(1,"Restarting video dma\n");
581 vivi_stop_thread(dma_q);
582// vivi_start_thread(dma_q);
583
584 /* cancel all outstanding capture / vbi requests */
585 list_for_each(item,&dma_q->active) {
586 buf = list_entry(item, struct vivi_buffer, vb.queue);
587
588 list_del(&buf->vb.queue);
589 buf->vb.state = STATE_ERROR;
590 wake_up(&buf->vb.done);
591 }
592 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
593
594 return 0;
595 }
596
597 prev = NULL;
598 for (;;) {
599 if (list_empty(&dma_q->queued))
600 return 0;
601 buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
602 if (NULL == prev) {
603 list_del(&buf->vb.queue);
604 list_add_tail(&buf->vb.queue,&dma_q->active);
605
606 dprintk(1,"Restarting video dma\n");
607 vivi_stop_thread(dma_q);
608 vivi_start_thread(dma_q);
609
610 buf->vb.state = STATE_ACTIVE;
611 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
612 dprintk(2,"[%p/%d] restart_queue - first active\n",
613 buf,buf->vb.i);
614
615 } else if (prev->vb.width == buf->vb.width &&
616 prev->vb.height == buf->vb.height &&
617 prev->fmt == buf->fmt) {
618 list_del(&buf->vb.queue);
619 list_add_tail(&buf->vb.queue,&dma_q->active);
620 buf->vb.state = STATE_ACTIVE;
621 dprintk(2,"[%p/%d] restart_queue - move to active\n",
622 buf,buf->vb.i);
623 } else {
624 return 0;
625 }
626 prev = buf;
627 }
628}
629
630static void vivi_vid_timeout(unsigned long data)
631{
632 struct vivi_dev *dev = (struct vivi_dev*)data;
633 struct vivi_dmaqueue *vidq = &dev->vidq;
634 struct vivi_buffer *buf;
635
636 while (!list_empty(&vidq->active)) {
637 buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
638 list_del(&buf->vb.queue);
639 buf->vb.state = STATE_ERROR;
640 wake_up(&buf->vb.done);
641 printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
642 }
643
644 restart_video_queue(vidq);
645}
646
647/* ------------------------------------------------------------------
648 Videobuf operations
649 ------------------------------------------------------------------*/
650static int
651buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
652{
653 struct vivi_fh *fh = vq->priv_data;
654
655 *size = fh->width*fh->height*2;
656
657 if (0 == *count)
658 *count = 32;
659 while (*size * *count > vid_limit * 1024 * 1024)
660 (*count)--;
661 return 0;
662}
663
664void
665free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
666{
667 dprintk(1,"%s\n",__FUNCTION__);
668
669 if (in_interrupt())
670 BUG();
671
672 /*FIXME: Maybe a spinlock is required here */
673 kfree(buf->to_addr);
674 buf->to_addr=NULL;
675
676 videobuf_waiton(&buf->vb,0,0);
677 videobuf_dma_unmap(vq, &buf->vb.dma);
678 videobuf_dma_free(&buf->vb.dma);
679 buf->vb.state = STATE_NEEDS_INIT;
680}
681
682#define norm_maxw() 1024
683#define norm_maxh() 768
684static int
685buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
686 enum v4l2_field field)
687{
688 struct vivi_fh *fh = vq->priv_data;
689 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
690 int rc, init_buffer = 0;
691
692// dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
693
694 BUG_ON(NULL == fh->fmt);
695 if (fh->width < 48 || fh->width > norm_maxw() ||
696 fh->height < 32 || fh->height > norm_maxh())
697 return -EINVAL;
698 buf->vb.size = fh->width*fh->height*2;
699 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
700 return -EINVAL;
701
702 if (buf->fmt != fh->fmt ||
703 buf->vb.width != fh->width ||
704 buf->vb.height != fh->height ||
705 buf->vb.field != field) {
706 buf->fmt = fh->fmt;
707 buf->vb.width = fh->width;
708 buf->vb.height = fh->height;
709 buf->vb.field = field;
710 init_buffer = 1;
711 }
712
713 if (STATE_NEEDS_INIT == buf->vb.state) {
714 if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
715 goto fail;
716 }
717
718 buf->vb.state = STATE_PREPARED;
719
720 if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) {
721 rc=-ENOMEM;
722 goto fail;
723 }
724
725 return 0;
726
727fail:
728 free_buffer(vq,buf);
729 return rc;
730}
731
732static void
733buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
734{
735 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
736 struct vivi_fh *fh = vq->priv_data;
737 struct vivi_dev *dev = fh->dev;
738 struct vivi_dmaqueue *vidq = &dev->vidq;
739 struct vivi_buffer *prev;
740
741 if (!list_empty(&vidq->queued)) {
742 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
743 list_add_tail(&buf->vb.queue,&vidq->queued);
744 buf->vb.state = STATE_QUEUED;
745 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
746 buf, buf->vb.i);
747 } else if (list_empty(&vidq->active)) {
748 list_add_tail(&buf->vb.queue,&vidq->active);
749
750 buf->vb.state = STATE_ACTIVE;
751 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
752 dprintk(2,"[%p/%d] buffer_queue - first active\n",
753 buf, buf->vb.i);
754
755 vivi_start_thread(vidq);
756 } else {
757 prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
758 if (prev->vb.width == buf->vb.width &&
759 prev->vb.height == buf->vb.height &&
760 prev->fmt == buf->fmt) {
761 list_add_tail(&buf->vb.queue,&vidq->active);
762 buf->vb.state = STATE_ACTIVE;
763 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
764 buf, buf->vb.i);
765
766 } else {
767 list_add_tail(&buf->vb.queue,&vidq->queued);
768 buf->vb.state = STATE_QUEUED;
769 dprintk(2,"[%p/%d] buffer_queue - first queued\n",
770 buf, buf->vb.i);
771 }
772 }
773}
774
775static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
776{
777 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
778 struct vivi_fh *fh = vq->priv_data;
779 struct vivi_dev *dev = (struct vivi_dev*)fh->dev;
780 struct vivi_dmaqueue *vidq = &dev->vidq;
781
782 dprintk(1,"%s\n",__FUNCTION__);
783
784 vivi_stop_thread(vidq);
785
786 free_buffer(vq,buf);
787}
788
789int vivi_map_sg (void *dev, struct scatterlist *sg, int nents,
790 int direction)
791{
792 int i;
793
794 dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents);
795 BUG_ON(direction == DMA_NONE);
796
797 for (i = 0; i < nents; i++ ) {
798 BUG_ON(!sg[i].page);
799
800 sg[i].dma_address = page_to_phys(sg[i].page) + sg[i].offset;
801 }
802
803 return nents;
804}
805
806int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages,
807 int direction)
808{
809 dprintk(1,"%s\n",__FUNCTION__);
810 return 0;
811}
812
813int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist,int nr_pages,
814 int direction)
815{
816// dprintk(1,"%s\n",__FUNCTION__);
817
818// flush_write_buffers();
819 return 0;
820}
821
822static struct videobuf_queue_ops vivi_video_qops = {
823 .buf_setup = buffer_setup,
824 .buf_prepare = buffer_prepare,
825 .buf_queue = buffer_queue,
826 .buf_release = buffer_release,
827
828 /* Non-pci handling routines */
829 .vb_map_sg = vivi_map_sg,
830 .vb_dma_sync_sg = vivi_dma_sync_sg,
831 .vb_unmap_sg = vivi_unmap_sg,
832};
833
834/* ------------------------------------------------------------------
835 IOCTL handling
836 ------------------------------------------------------------------*/
837
838static int vivi_try_fmt(struct vivi_dev *dev, struct vivi_fh *fh,
839 struct v4l2_format *f)
840{
841 struct vivi_fmt *fmt;
842 enum v4l2_field field;
843 unsigned int maxw, maxh;
844
845 if (format.fourcc != f->fmt.pix.pixelformat) {
846 dprintk(1,"Fourcc format invalid.\n");
847 return -EINVAL;
848 }
849 fmt=&format;
850
851 field = f->fmt.pix.field;
852
853 if (field == V4L2_FIELD_ANY) {
854// field=V4L2_FIELD_INTERLACED;
855 field=V4L2_FIELD_SEQ_TB;
856 } else if (V4L2_FIELD_INTERLACED != field) {
857 dprintk(1,"Field type invalid.\n");
858 return -EINVAL;
859 }
860
861 maxw = norm_maxw();
862 maxh = norm_maxh();
863
864 f->fmt.pix.field = field;
865 if (f->fmt.pix.height < 32)
866 f->fmt.pix.height = 32;
867 if (f->fmt.pix.height > maxh)
868 f->fmt.pix.height = maxh;
869 if (f->fmt.pix.width < 48)
870 f->fmt.pix.width = 48;
871 if (f->fmt.pix.width > maxw)
872 f->fmt.pix.width = maxw;
873 f->fmt.pix.width &= ~0x03;
874 f->fmt.pix.bytesperline =
875 (f->fmt.pix.width * fmt->depth) >> 3;
876 f->fmt.pix.sizeimage =
877 f->fmt.pix.height * f->fmt.pix.bytesperline;
878
879 return 0;
880}
881
882static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
883{
884 /* is it free? */
885 down(&dev->lock);
886 if (dev->resources) {
887 /* no, someone else uses it */
888 up(&dev->lock);
889 return 0;
890 }
891 /* it's free, grab it */
892 dev->resources =1;
893 dprintk(1,"res: get\n");
894 up(&dev->lock);
895 return 1;
896}
897
898static inline int res_locked(struct vivi_dev *dev)
899{
900 return (dev->resources);
901}
902
903static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
904{
905 down(&dev->lock);
906 dev->resources = 0;
907 dprintk(1,"res: put\n");
908 up(&dev->lock);
909}
910
911static int vivi_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg)
912{
913 struct vivi_fh *fh = file->private_data;
914 struct vivi_dev *dev = fh->dev;
915 int ret=0;
916
917 if (debug) {
918 if (_IOC_DIR(cmd) & _IOC_WRITE)
919 v4l_printk_ioctl_arg("vivi(w)",cmd, arg);
920 else if (!_IOC_DIR(cmd) & _IOC_READ) {
921 v4l_print_ioctl("vivi", cmd);
922 }
923 }
924
925 switch(cmd) {
926 /* --- capabilities ------------------------------------------ */
927 case VIDIOC_QUERYCAP:
928 {
929 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
930
931 memset(cap, 0, sizeof(*cap));
932
933 strcpy(cap->driver, "vivi");
934 strcpy(cap->card, "vivi");
935 cap->version = VIVI_VERSION;
936 cap->capabilities =
937 V4L2_CAP_VIDEO_CAPTURE |
938 V4L2_CAP_STREAMING |
939 V4L2_CAP_READWRITE;
940 break;
941 }
942 /* --- capture ioctls ---------------------------------------- */
943 case VIDIOC_ENUM_FMT:
944 {
945 struct v4l2_fmtdesc *f = arg;
946 enum v4l2_buf_type type;
947 unsigned int index;
948
949 index = f->index;
950 type = f->type;
951
952 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
953 ret=-EINVAL;
954 break;
955 }
956
957 switch (type) {
958 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
959 if (index > 0){
960 ret=-EINVAL;
961 break;
962 }
963 memset(f,0,sizeof(*f));
964
965 f->index = index;
966 f->type = type;
967 strlcpy(f->description,format.name,sizeof(f->description));
968 f->pixelformat = format.fourcc;
969 break;
970 default:
971 ret=-EINVAL;
972 }
973 break;
974 }
975 case VIDIOC_G_FMT:
976 {
977 struct v4l2_format *f = (struct v4l2_format *)arg;
978
979 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
980 ret=-EINVAL;
981 break;
982 }
983
984 memset(&f->fmt.pix,0,sizeof(f->fmt.pix));
985 f->fmt.pix.width = fh->width;
986 f->fmt.pix.height = fh->height;
987 f->fmt.pix.field = fh->vb_vidq.field;
988 f->fmt.pix.pixelformat = fh->fmt->fourcc;
989 f->fmt.pix.bytesperline =
990 (f->fmt.pix.width * fh->fmt->depth) >> 3;
991 f->fmt.pix.sizeimage =
992 f->fmt.pix.height * f->fmt.pix.bytesperline;
993 break;
994 }
995 case VIDIOC_S_FMT:
996 {
997 struct v4l2_format *f = arg;
998
999 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1000 dprintk(1,"Only capture supported.\n");
1001 ret=-EINVAL;
1002 break;
1003 }
1004
1005 ret = vivi_try_fmt(dev,fh,f);
1006 if (ret < 0)
1007 break;
1008
1009 fh->fmt = &format;
1010 fh->width = f->fmt.pix.width;
1011 fh->height = f->fmt.pix.height;
1012 fh->vb_vidq.field = f->fmt.pix.field;
1013 fh->type = f->type;
1014
1015 break;
1016 }
1017 case VIDIOC_TRY_FMT:
1018 {
1019 struct v4l2_format *f = arg;
1020 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1021 ret=-EINVAL;
1022 break;
1023 }
1024
1025 ret=vivi_try_fmt(dev,fh,f);
1026 break;
1027 }
1028 case VIDIOC_REQBUFS:
1029 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1030 ret=-EINVAL;
1031 break;
1032 }
1033 ret=videobuf_reqbufs(&fh->vb_vidq, arg);
1034 break;
1035 case VIDIOC_QUERYBUF:
1036 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1037 ret=-EINVAL;
1038 break;
1039 }
1040 ret=videobuf_querybuf(&fh->vb_vidq, arg);
1041 break;
1042 case VIDIOC_QBUF:
1043 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1044 ret=-EINVAL;
1045 break;
1046 }
1047 ret=videobuf_qbuf(&fh->vb_vidq, arg);
1048 break;
1049 case VIDIOC_DQBUF:
1050 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1051 ret=-EINVAL;
1052 break;
1053 }
1054 ret=videobuf_dqbuf(&fh->vb_vidq, arg,
1055 file->f_flags & O_NONBLOCK);
1056 break;
1057#ifdef HAVE_V4L1
1058 /* --- streaming capture ------------------------------------- */
1059 case VIDIOCGMBUF:
1060 {
1061 struct video_mbuf *mbuf = arg;
1062 struct videobuf_queue *q=&fh->vb_vidq;
1063 struct v4l2_requestbuffers req;
1064 unsigned int i;
1065
1066 memset(&req,0,sizeof(req));
1067 req.type = q->type;
1068 req.count = 8;
1069 req.memory = V4L2_MEMORY_MMAP;
1070 ret = videobuf_reqbufs(q,&req);
1071 if (ret < 0)
1072 break;
1073 memset(mbuf,0,sizeof(*mbuf));
1074 mbuf->frames = req.count;
1075 mbuf->size = 0;
1076 for (i = 0; i < mbuf->frames; i++) {
1077 mbuf->offsets[i] = q->bufs[i]->boff;
1078 mbuf->size += q->bufs[i]->bsize;
1079 }
1080 break;
1081 }
1082#endif
1083 case VIDIOC_STREAMON:
1084 {
1085 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1086 return -EINVAL;
1087 if (!res_get(dev,fh))
1088 return -EBUSY;
1089 ret=videobuf_streamon(&fh->vb_vidq);
1090 break;
1091 }
1092 case VIDIOC_STREAMOFF:
1093 {
1094 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1095 ret=-EINVAL;
1096 break;
1097 }
1098 ret = videobuf_streamoff(&fh->vb_vidq);
1099 if (ret < 0)
1100 break;
1101 res_free(dev,fh);
1102 break;
1103 }
1104 /* ---------- tv norms ---------- */
1105 case VIDIOC_ENUMSTD:
1106 {
1107 struct v4l2_standard *e = arg;
1108
1109 if (e->index>0) {
1110 ret=-EINVAL;
1111 break;
1112 }
1113 ret = v4l2_video_std_construct(e, V4L2_STD_NTSC_M, "NTSC-M");
1114
1115 /* Allows vivi to use different fps from video std */
1116 e->frameperiod.numerator = WAKE_NUMERATOR;
1117 e->frameperiod.denominator = WAKE_DENOMINATOR;
1118
1119 break;
1120 }
1121 case VIDIOC_G_STD:
1122 {
1123 v4l2_std_id *id = arg;
1124
1125 *id = V4L2_STD_NTSC_M;
1126 break;
1127 }
1128 case VIDIOC_S_STD:
1129 {
1130 break;
1131 }
1132 /* ------ input switching ---------- */
1133 case VIDIOC_ENUMINPUT:
1134 { /* only one input in this sample driver */
1135 struct v4l2_input *inp = arg;
1136
1137 if (inp->index != 0) {
1138 ret=-EINVAL;
1139 break;
1140 }
1141 memset(inp, 0, sizeof(*inp));
1142
1143 inp->index = 0;
1144 inp->type = V4L2_INPUT_TYPE_CAMERA;
1145 inp->std = V4L2_STD_NTSC_M;
1146 strcpy(inp->name,"Camera");
1147 break;
1148 }
1149 case VIDIOC_G_INPUT:
1150 {
1151 unsigned int *i = arg;
1152
1153 *i = 0;
1154 break;
1155 }
1156 case VIDIOC_S_INPUT:
1157 {
1158 unsigned int *i = arg;
1159
1160 if (*i > 0)
1161 ret=-EINVAL;
1162 break;
1163 }
1164
1165 /* --- controls ---------------------------------------------- */
1166 case VIDIOC_QUERYCTRL:
1167 {
1168 struct v4l2_queryctrl *qc = arg;
1169 int i;
1170
1171 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1172 if (qc->id && qc->id == vivi_qctrl[i].id) {
1173 memcpy(qc, &(vivi_qctrl[i]),
1174 sizeof(*qc));
1175 break;
1176 }
1177
1178 ret=-EINVAL;
1179 break;
1180 }
1181 case VIDIOC_G_CTRL:
1182 {
1183 struct v4l2_control *ctrl = arg;
1184 int i;
1185
1186 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1187 if (ctrl->id == vivi_qctrl[i].id) {
1188 ctrl->value=qctl_regs[i];
1189 break;
1190 }
1191
1192 ret=-EINVAL;
1193 break;
1194 }
1195 case VIDIOC_S_CTRL:
1196 {
1197 struct v4l2_control *ctrl = arg;
1198 int i;
1199 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1200 if (ctrl->id == vivi_qctrl[i].id) {
1201 if (ctrl->value <
1202 vivi_qctrl[i].minimum
1203 || ctrl->value >
1204 vivi_qctrl[i].maximum) {
1205 ret=-ERANGE;
1206 break;
1207 }
1208 qctl_regs[i]=ctrl->value;
1209 break;
1210 }
1211 ret=-EINVAL;
1212 break;
1213 }
1214 default:
1215 ret=v4l_compat_translate_ioctl(inode,file,cmd,arg,vivi_do_ioctl);
1216 }
1217
1218 if (debug) {
1219 if (ret<0) {
1220 v4l_print_ioctl("vivi(err)", cmd);
1221 dprintk(1,"errcode=%d\n",ret);
1222 } else if (_IOC_DIR(cmd) & _IOC_READ)
1223 v4l_printk_ioctl_arg("vivi(r)",cmd, arg);
1224 }
1225
1226 return ret;
1227}
1228
1229static int vivi_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1230{
1231 return video_usercopy(inode, file, cmd, arg, vivi_do_ioctl);
1232}
1233
1234/* ------------------------------------------------------------------
1235 File operations for the device
1236 ------------------------------------------------------------------*/
1237
1238#define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1239
1240static int vivi_open(struct inode *inode, struct file *file)
1241{
1242 int minor = iminor(inode);
1243 struct vivi_dev *h,*dev = NULL;
1244 struct vivi_fh *fh;
1245 struct list_head *list;
1246 enum v4l2_buf_type type = 0;
1247 int i;
1248
1249 printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
1250
1251 list_for_each(list,&vivi_devlist) {
1252 h = list_entry(list, struct vivi_dev, vivi_devlist);
1253 if (h->video_dev.minor == minor) {
1254 dev = h;
1255 type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1256 }
1257 }
1258 if (NULL == dev)
1259 return -ENODEV;
1260
1261
1262 /* If more than one user, mutex should be added */
1263 dev->users++;
1264
1265 dprintk(1,"open minor=%d type=%s users=%d\n",
1266 minor,v4l2_type_names[type],dev->users);
1267
1268 /* allocate + initialize per filehandle data */
1269 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
1270 if (NULL == fh) {
1271 dev->users--;
1272 return -ENOMEM;
1273 }
1274
1275 file->private_data = fh;
1276 fh->dev = dev;
1277 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1278 fh->fmt = &format;
1279 fh->width = 640;
1280 fh->height = 480;
1281
1282 /* Put all controls at a sane state */
1283 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1284 qctl_regs[i] =vivi_qctrl[i].default_value;
1285
1286 dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1287 (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
1288 dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued));
1289 dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active));
1290
1291 /* Resets frame counters */
1292 dev->h=0;
1293 dev->m=0;
1294 dev->s=0;
1295 dev->us=0;
1296 dev->jiffies=jiffies;
1297 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
1298 dev->h,dev->m,dev->s,(dev->us+500)/1000);
1299
1300 videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops,
1301 NULL, NULL,
1302 fh->type,
1303 V4L2_FIELD_INTERLACED,
1304 sizeof(struct vivi_buffer),fh);
1305
1306 return 0;
1307}
1308
1309static ssize_t
1310vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1311{
1312 struct vivi_fh *fh = file->private_data;
1313
1314 if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1315 if (res_locked(fh->dev))
1316 return -EBUSY;
1317 return videobuf_read_one(&fh->vb_vidq, data, count, ppos,
1318 file->f_flags & O_NONBLOCK);
1319 }
1320 return 0;
1321}
1322
1323static unsigned int
1324vivi_poll(struct file *file, struct poll_table_struct *wait)
1325{
1326 struct vivi_fh *fh = file->private_data;
1327 struct vivi_buffer *buf;
1328
1329 dprintk(1,"%s\n",__FUNCTION__);
1330
1331 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1332 return POLLERR;
1333
1334 if (res_get(fh->dev,fh)) {
1335 dprintk(1,"poll: mmap interface\n");
1336 /* streaming capture */
1337 if (list_empty(&fh->vb_vidq.stream))
1338 return POLLERR;
1339 buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream);
1340 } else {
1341 dprintk(1,"poll: read() interface\n");
1342 /* read() capture */
1343 buf = (struct vivi_buffer*)fh->vb_vidq.read_buf;
1344 if (NULL == buf)
1345 return POLLERR;
1346 }
1347 poll_wait(file, &buf->vb.done, wait);
1348 if (buf->vb.state == STATE_DONE ||
1349 buf->vb.state == STATE_ERROR)
1350 return POLLIN|POLLRDNORM;
1351 return 0;
1352}
1353
1354static int vivi_release(struct inode *inode, struct file *file)
1355{
1356 struct vivi_fh *fh = file->private_data;
1357 struct vivi_dev *dev = fh->dev;
1358 struct vivi_dmaqueue *vidq = &dev->vidq;
1359
1360 int minor = iminor(inode);
1361
1362 vivi_stop_thread(vidq);
1363 videobuf_mmap_free(&fh->vb_vidq);
1364
1365 kfree (fh);
1366
1367 dev->users--;
1368
1369 printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users);
1370
1371 return 0;
1372}
1373
1374static int
1375vivi_mmap(struct file *file, struct vm_area_struct * vma)
1376{
1377 struct vivi_fh *fh = file->private_data;
1378 int ret;
1379
1380 dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma);
1381
1382 ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
1383
1384 dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1385 (unsigned long)vma->vm_start,
1386 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1387 ret);
1388
1389 return ret;
1390}
1391
1392static struct file_operations vivi_fops = {
1393 .owner = THIS_MODULE,
1394 .open = vivi_open,
1395 .release = vivi_release,
1396 .read = vivi_read,
1397 .poll = vivi_poll,
1398 .ioctl = vivi_ioctl,
1399 .mmap = vivi_mmap,
1400 .llseek = no_llseek,
1401};
1402
1403static struct video_device vivi = {
1404 .name = "VTM Virtual Video Capture Board",
1405 .type = VID_TYPE_CAPTURE,
1406 .hardware = 0,
1407 .fops = &vivi_fops,
1408 .minor = -1,
1409// .release = video_device_release,
1410};
1411/* ------------------------------------------------------------------
1412 Initialization and module stuff
1413 ------------------------------------------------------------------*/
1414
1415static int __init vivi_init(void)
1416{
1417 int ret;
1418 struct vivi_dev *dev;
1419
1420 dev = kzalloc(sizeof(*dev),GFP_KERNEL);
1421 if (NULL == dev)
1422 return -ENOMEM;
1423 list_add_tail(&dev->vivi_devlist,&vivi_devlist);
1424
1425 /* init video dma queues */
1426 INIT_LIST_HEAD(&dev->vidq.active);
1427 INIT_LIST_HEAD(&dev->vidq.queued);
1428
1429 /* initialize locks */
1430 init_MUTEX(&dev->lock);
1431
1432 dev->vidq.timeout.function = vivi_vid_timeout;
1433 dev->vidq.timeout.data = (unsigned long)dev;
1434 init_timer(&dev->vidq.timeout);
1435
1436 ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
1437 printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
1438 return ret;
1439}
1440
1441static void __exit vivi_exit(void)
1442{
1443 struct vivi_dev *h;
1444 struct list_head *list;
1445
1446 list_for_each(list,&vivi_devlist) {
1447 h = list_entry(list, struct vivi_dev, vivi_devlist);
1448 kfree (h);
1449 }
1450 video_unregister_device(&vivi);
1451}
1452
1453module_init(vivi_init);
1454module_exit(vivi_exit);