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V4L/DVB (3912): Sparc32 vivi fix
[GitHub/mt8127/android_kernel_alcatel_ttab.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>
28#include <linux/videodev2.h>
cd41e28e
MCC		 29#ifdef CONFIG_VIDEO_V4L1_COMPAT
30/* Include V4L1 specific functions. Should be removed soon */
31#include <linux/videodev.h>
32#endif
f13df919 33#include <linux/interrupt.h>
1e6dd65e
MCC		 34#include <media/video-buf.h>
35#include <media/v4l2-common.h>
36#include <linux/kthread.h>
37#include <linux/highmem.h>
38
39/* Wake up at about 30 fps */
40#define WAKE_NUMERATOR 30
41#define WAKE_DENOMINATOR 1001
42#define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
43
44/* These timers are for 1 fps - used only for testing */
45//#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
46//#define BUFFER_TIMEOUT msecs_to_jiffies(5000) /* 5 seconds */
47
48#include "font.h"
49
50#ifndef kzalloc
51#define kzalloc(size, flags) \
52({ \
53 void *__ret = kmalloc(size, flags); \
54 if (__ret) \
55 memset(__ret, 0, size); \
56 __ret; \
57})
58#endif
59
60MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
280323dd 61MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1e6dd65e
MCC		 62MODULE_LICENSE("Dual BSD/GPL");
63
64#define VIVI_MAJOR_VERSION 0
65#define VIVI_MINOR_VERSION 4
66#define VIVI_RELEASE 0
67#define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
68
69static int video_nr = -1; /* /dev/videoN, -1 for autodetect */
70module_param(video_nr, int, 0);
71
72static int debug = 0;
73module_param(debug, int, 0);
74
75static unsigned int vid_limit = 16;
76module_param(vid_limit,int,0644);
77MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
78
79/* supported controls */
80static struct v4l2_queryctrl vivi_qctrl[] = {
81 {
82 .id = V4L2_CID_AUDIO_VOLUME,
83 .name = "Volume",
84 .minimum = 0,
85 .maximum = 65535,
86 .step = 65535/100,
87 .default_value = 65535,
88 .flags = 0,
89 .type = V4L2_CTRL_TYPE_INTEGER,
90 },{
91 .id = V4L2_CID_BRIGHTNESS,
92 .type = V4L2_CTRL_TYPE_INTEGER,
93 .name = "Brightness",
94 .minimum = 0,
95 .maximum = 255,
96 .step = 1,
97 .default_value = 127,
98 .flags = 0,
99 }, {
100 .id = V4L2_CID_CONTRAST,
101 .type = V4L2_CTRL_TYPE_INTEGER,
102 .name = "Contrast",
103 .minimum = 0,
104 .maximum = 255,
105 .step = 0x1,
106 .default_value = 0x10,
107 .flags = 0,
108 }, {
109 .id = V4L2_CID_SATURATION,
110 .type = V4L2_CTRL_TYPE_INTEGER,
111 .name = "Saturation",
112 .minimum = 0,
113 .maximum = 255,
114 .step = 0x1,
115 .default_value = 127,
116 .flags = 0,
117 }, {
118 .id = V4L2_CID_HUE,
119 .type = V4L2_CTRL_TYPE_INTEGER,
120 .name = "Hue",
121 .minimum = -128,
122 .maximum = 127,
123 .step = 0x1,
124 .default_value = 0,
125 .flags = 0,
126 }
127};
128
129static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
130
131#define dprintk(level,fmt, arg...) \
132 do { \
133 if (debug >= (level)) \
134 printk(KERN_DEBUG "vivi: " fmt , ## arg); \
135 } while (0)
136
137/* ------------------------------------------------------------------
138 Basic structures
139 ------------------------------------------------------------------*/
140
141struct vivi_fmt {
142 char *name;
143 u32 fourcc; /* v4l2 format id */
144 int depth;
145};
146
147static struct vivi_fmt format = {
148 .name = "4:2:2, packed, YUYV",
149 .fourcc = V4L2_PIX_FMT_YUYV,
150 .depth = 16,
151};
152
153struct sg_to_addr {
154 int pos;
155 struct scatterlist *sg;
156};
157
158/* buffer for one video frame */
159struct vivi_buffer {
160 /* common v4l buffer stuff -- must be first */
161 struct videobuf_buffer vb;
162
163 struct vivi_fmt *fmt;
164
165 struct sg_to_addr *to_addr;
166};
167
168struct vivi_dmaqueue {
169 struct list_head active;
170 struct list_head queued;
171 struct timer_list timeout;
172
173 /* thread for generating video stream*/
174 struct task_struct *kthread;
175 wait_queue_head_t wq;
176 /* Counters to control fps rate */
177 int frame;
178 int ini_jiffies;
179};
180
181static LIST_HEAD(vivi_devlist);
182
183struct vivi_dev {
184 struct list_head vivi_devlist;
185
186 struct semaphore lock;
187
188 int users;
189
190 /* various device info */
191 unsigned int resources;
192 struct video_device video_dev;
193
194 struct vivi_dmaqueue vidq;
195
196 /* Several counters */
197 int h,m,s,us,jiffies;
198 char timestr[13];
199};
200
201struct vivi_fh {
202 struct vivi_dev *dev;
203
204 /* video capture */
205 struct vivi_fmt *fmt;
206 unsigned int width,height;
207 struct videobuf_queue vb_vidq;
208
209 enum v4l2_buf_type type;
210};
211
212/* ------------------------------------------------------------------
213 DMA and thread functions
214 ------------------------------------------------------------------*/
215
216/* Bars and Colors should match positions */
217
218enum colors {
219 WHITE,
220 AMBAR,
221 CYAN,
222 GREEN,
223 MAGENTA,
224 RED,
225 BLUE
226};
227
228static u8 bars[8][3] = {
229 /* R G B */
230 {204,204,204}, /* white */
231 {208,208, 0}, /* ambar */
232 { 0,206,206}, /* cyan */
233 { 0,239, 0}, /* green */
234 {239, 0,239}, /* magenta */
235 {205, 0, 0}, /* red */
236 { 0, 0,255}, /* blue */
237 { 0, 0, 0}
238};
239
240#define TO_Y(r,g,b) (((16829*r +33039*g +6416*b + 32768)>>16)+16)
241/* RGB to V(Cr) Color transform */
242#define TO_V(r,g,b) (((28784*r -24103*g -4681*b + 32768)>>16)+128)
243/* RGB to U(Cb) Color transform */
244#define TO_U(r,g,b) (((-9714*r -19070*g +28784*b + 32768)>>16)+128)
245
246#define TSTAMP_MIN_Y 24
247#define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
248#define TSTAMP_MIN_X 64
249
250void prep_to_addr(struct sg_to_addr to_addr[],struct videobuf_buffer *vb)
251{
252 int i, pos=0;
253
254 for (i=0;i<vb->dma.nr_pages;i++) {
255 to_addr[i].sg=&vb->dma.sglist[i];
256 to_addr[i].pos=pos;
257 pos += vb->dma.sglist[i].length;
258 }
259}
260
261inline int get_addr_pos(int pos, int pages, struct sg_to_addr to_addr[])
262{
263 int p1=0,p2=pages-1,p3=pages/2;
264
265 /* Sanity test */
266 BUG_ON (pos>=to_addr[p2].pos+to_addr[p2].sg->length);
267
268 while (p1+1<p2) {
269 if (pos < to_addr[p3].pos) {
270 p2=p3;
271 } else {
272 p1=p3;
273 }
274 p3=(p1+p2)/2;
275 }
276 if (pos >= to_addr[p2].pos)
277 p1=p2;
278
279 return (p1);
280}
281
282void gen_line(struct sg_to_addr to_addr[],int inipos,int pages,int wmax,
283 int hmax, int line, char *timestr)
284{
285 int w,i,j,pos=inipos,pgpos,oldpg,y;
286 char *p,*s,*basep;
287 struct page *pg;
288 u8 chr,r,g,b,color;
289
290 /* Get first addr pointed to pixel position */
291 oldpg=get_addr_pos(pos,pages,to_addr);
292 pg=pfn_to_page(to_addr[oldpg].sg->dma_address >> PAGE_SHIFT);
293 basep = kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[oldpg].sg->offset;
294
295 /* We will just duplicate the second pixel at the packet */
296 wmax/=2;
297
298 /* Generate a standard color bar pattern */
299 for (w=0;w<wmax;w++) {
300 r=bars[w*7/wmax][0];
301 g=bars[w*7/wmax][1];
302 b=bars[w*7/wmax][2];
303
304 for (color=0;color<4;color++) {
305 pgpos=get_addr_pos(pos,pages,to_addr);
306 if (pgpos!=oldpg) {
307 pg=pfn_to_page(to_addr[pgpos].sg->dma_address >> PAGE_SHIFT);
308 kunmap_atomic(basep, KM_BOUNCE_READ);
309 basep= kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[pgpos].sg->offset;
310 oldpg=pgpos;
311 }
312 p=basep+pos-to_addr[pgpos].pos;
313
314 switch (color) {
315 case 0:
316 case 2:
317 *p=TO_Y(r,g,b); /* Luminance */
318 break;
319 case 1:
320 *p=TO_U(r,g,b); /* Cb */
321 break;
322 case 3:
323 *p=TO_V(r,g,b); /* Cr */
324 break;
325 }
326 pos++;
327 }
328 }
329
330 /* Checks if it is possible to show timestamp */
331 if (TSTAMP_MAX_Y>=hmax)
332 goto end;
333 if (TSTAMP_MIN_X+strlen(timestr)>=wmax)
334 goto end;
335
336 /* Print stream time */
337 if (line>=TSTAMP_MIN_Y && line<=TSTAMP_MAX_Y) {
338 j=TSTAMP_MIN_X;
339 for (s=timestr;*s;s++) {
340 chr=rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
341 for (i=0;i<7;i++) {
342 if (chr&1<<(7-i)) { /* Font color*/
343 r=bars[BLUE][0];
344 g=bars[BLUE][1];
345 b=bars[BLUE][2];
346 r=g=b=0;
347 g=198;
348 } else { /* Background color */
349 r=bars[WHITE][0];
350 g=bars[WHITE][1];
351 b=bars[WHITE][2];
352 r=g=b=0;
353 }
354
355 pos=inipos+j*2;
356 for (color=0;color<4;color++) {
357 pgpos=get_addr_pos(pos,pages,to_addr);
358 if (pgpos!=oldpg) {
359 pg=pfn_to_page(to_addr[pgpos].
360 sg->dma_address
361 >> PAGE_SHIFT);
362 kunmap_atomic(basep,
363 KM_BOUNCE_READ);
364 basep= kmap_atomic(pg,
365 KM_BOUNCE_READ)+
366 to_addr[pgpos].sg->offset;
367 oldpg=pgpos;
368 }
369 p=basep+pos-to_addr[pgpos].pos;
370
371 y=TO_Y(r,g,b);
372
373 switch (color) {
374 case 0:
375 case 2:
376 *p=TO_Y(r,g,b); /* Luminance */
377 break;
378 case 1:
379 *p=TO_U(r,g,b); /* Cb */
380 break;
381 case 3:
382 *p=TO_V(r,g,b); /* Cr */
383 break;
384 }
385 pos++;
386 }
387 j++;
388 }
389 }
390 }
391
392
393end:
394 kunmap_atomic(basep, KM_BOUNCE_READ);
395}
396static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf)
397{
398 int h,pos=0;
399 int hmax = buf->vb.height;
400 int wmax = buf->vb.width;
401 struct videobuf_buffer *vb=&buf->vb;
402 struct sg_to_addr *to_addr=buf->to_addr;
403 struct timeval ts;
404
405 /* Test if DMA mapping is ready */
406 if (!vb->dma.sglist[0].dma_address)
407 return;
408
409 prep_to_addr(to_addr,vb);
410
411 /* Check if there is enough memory */
412 BUG_ON(buf->vb.dma.nr_pages << PAGE_SHIFT < (buf->vb.width*buf->vb.height)*2);
413
414 for (h=0;h<hmax;h++) {
415 gen_line(to_addr,pos,vb->dma.nr_pages,wmax,hmax,h,dev->timestr);
416 pos += wmax*2;
417 }
418
419 /* Updates stream time */
420
421 dev->us+=jiffies_to_usecs(jiffies-dev->jiffies);
422 dev->jiffies=jiffies;
423 if (dev->us>=1000000) {
424 dev->us-=1000000;
425 dev->s++;
426 if (dev->s>=60) {
427 dev->s-=60;
428 dev->m++;
429 if (dev->m>60) {
430 dev->m-=60;
431 dev->h++;
432 if (dev->h>24)
433 dev->h-=24;
434 }
435 }
436 }
437 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
438 dev->h,dev->m,dev->s,(dev->us+500)/1000);
439
440 dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr,
441 (unsigned long)buf->vb.dma.vmalloc,pos);
442
443 /* Advice that buffer was filled */
444 buf->vb.state = STATE_DONE;
445 buf->vb.field_count++;
446 do_gettimeofday(&ts);
447 buf->vb.ts = ts;
448
449 list_del(&buf->vb.queue);
450 wake_up(&buf->vb.done);
451}
452
453static int restart_video_queue(struct vivi_dmaqueue *dma_q);
454
455static void vivi_thread_tick(struct vivi_dmaqueue *dma_q)
456{
457 struct vivi_buffer *buf;
458 struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq);
459
460 int bc;
461
462 /* Announces videobuf that all went ok */
463 for (bc = 0;; bc++) {
464 if (list_empty(&dma_q->active)) {
465 dprintk(1,"No active queue to serve\n");
466 break;
467 }
468
469 buf = list_entry(dma_q->active.next,
470 struct vivi_buffer, vb.queue);
471
472 /* Nobody is waiting something to be done, just return */
473 if (!waitqueue_active(&buf->vb.done)) {
474 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
475 return;
476 }
477
478 do_gettimeofday(&buf->vb.ts);
479 dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i);
480
481 /* Fill buffer */
482 vivi_fillbuff(dev,buf);
483 }
484 if (list_empty(&dma_q->active)) {
485 del_timer(&dma_q->timeout);
486 } else {
487 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
488 }
489 if (bc != 1)
490 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc);
491}
492
493void vivi_sleep(struct vivi_dmaqueue *dma_q)
494{
495 int timeout;
496 DECLARE_WAITQUEUE(wait, current);
497
498 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
499
500 add_wait_queue(&dma_q->wq, &wait);
501 if (!kthread_should_stop()) {
502 dma_q->frame++;
503
504 /* Calculate time to wake up */
505 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
506
507 if (timeout <= 0) {
508 int old=dma_q->frame;
509 dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1;
510
511 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
512
513 dprintk(1,"underrun, losed %d frames. "
514 "Now, frame is %d. Waking on %d jiffies\n",
515 dma_q->frame-old,dma_q->frame,timeout);
516 } else
517 dprintk(1,"will sleep for %i jiffies\n",timeout);
518
519 vivi_thread_tick(dma_q);
520
521 schedule_timeout_interruptible (timeout);
522 }
523
524 remove_wait_queue(&dma_q->wq, &wait);
525 try_to_freeze();
526}
527
528int vivi_thread(void *data)
529{
530 struct vivi_dmaqueue *dma_q=data;
531
532 dprintk(1,"thread started\n");
533
534 for (;;) {
535 vivi_sleep(dma_q);
536
537 if (kthread_should_stop())
538 break;
539 }
540 dprintk(1, "thread: exit\n");
541 return 0;
542}
543
544int vivi_start_thread(struct vivi_dmaqueue *dma_q)
545{
546 dma_q->frame=0;
547 dma_q->ini_jiffies=jiffies;
548
549 dprintk(1,"%s\n",__FUNCTION__);
550 init_waitqueue_head(&dma_q->wq);
551
552 dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
553
554 if (dma_q->kthread == NULL) {
555 printk(KERN_ERR "vivi: kernel_thread() failed\n");
556 return -EINVAL;
557 }
558 dprintk(1,"returning from %s\n",__FUNCTION__);
559 return 0;
560}
561
562void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
563{
564 dprintk(1,"%s\n",__FUNCTION__);
565 /* shutdown control thread */
566 if (dma_q->kthread) {
567 kthread_stop(dma_q->kthread);
568 dma_q->kthread=NULL;
569 }
570}
571
572static int restart_video_queue(struct vivi_dmaqueue *dma_q)
573{
574 struct vivi_buffer *buf, *prev;
575 struct list_head *item;
576
577 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
578
579 if (!list_empty(&dma_q->active)) {
580 buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
581 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
582 buf, buf->vb.i);
583
584 dprintk(1,"Restarting video dma\n");
585 vivi_stop_thread(dma_q);
586// vivi_start_thread(dma_q);
587
588 /* cancel all outstanding capture / vbi requests */
589 list_for_each(item,&dma_q->active) {
590 buf = list_entry(item, struct vivi_buffer, vb.queue);
591
592 list_del(&buf->vb.queue);
593 buf->vb.state = STATE_ERROR;
594 wake_up(&buf->vb.done);
595 }
596 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
597
598 return 0;
599 }
600
601 prev = NULL;
602 for (;;) {
603 if (list_empty(&dma_q->queued))
604 return 0;
605 buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
606 if (NULL == prev) {
607 list_del(&buf->vb.queue);
608 list_add_tail(&buf->vb.queue,&dma_q->active);
609
610 dprintk(1,"Restarting video dma\n");
611 vivi_stop_thread(dma_q);
612 vivi_start_thread(dma_q);
613
614 buf->vb.state = STATE_ACTIVE;
615 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
616 dprintk(2,"[%p/%d] restart_queue - first active\n",
617 buf,buf->vb.i);
618
619 } else if (prev->vb.width == buf->vb.width &&
620 prev->vb.height == buf->vb.height &&
621 prev->fmt == buf->fmt) {
622 list_del(&buf->vb.queue);
623 list_add_tail(&buf->vb.queue,&dma_q->active);
624 buf->vb.state = STATE_ACTIVE;
625 dprintk(2,"[%p/%d] restart_queue - move to active\n",
626 buf,buf->vb.i);
627 } else {
628 return 0;
629 }
630 prev = buf;
631 }
632}
633
634static void vivi_vid_timeout(unsigned long data)
635{
636 struct vivi_dev *dev = (struct vivi_dev*)data;
637 struct vivi_dmaqueue *vidq = &dev->vidq;
638 struct vivi_buffer *buf;
639
640 while (!list_empty(&vidq->active)) {
641 buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
642 list_del(&buf->vb.queue);
643 buf->vb.state = STATE_ERROR;
644 wake_up(&buf->vb.done);
645 printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
646 }
647
648 restart_video_queue(vidq);
649}
650
651/* ------------------------------------------------------------------
652 Videobuf operations
653 ------------------------------------------------------------------*/
654static int
655buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
656{
657 struct vivi_fh *fh = vq->priv_data;
658
659 *size = fh->width*fh->height*2;
660
661 if (0 == *count)
662 *count = 32;
663 while (*size * *count > vid_limit * 1024 * 1024)
664 (*count)--;
665 return 0;
666}
667
668void
669free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
670{
671 dprintk(1,"%s\n",__FUNCTION__);
672
673 if (in_interrupt())
674 BUG();
675
676 /*FIXME: Maybe a spinlock is required here */
677 kfree(buf->to_addr);
678 buf->to_addr=NULL;
679
680 videobuf_waiton(&buf->vb,0,0);
681 videobuf_dma_unmap(vq, &buf->vb.dma);
682 videobuf_dma_free(&buf->vb.dma);
683 buf->vb.state = STATE_NEEDS_INIT;
684}
685
686#define norm_maxw() 1024
687#define norm_maxh() 768
688static int
689buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
690 enum v4l2_field field)
691{
692 struct vivi_fh *fh = vq->priv_data;
693 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
694 int rc, init_buffer = 0;
695
696// dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
697
698 BUG_ON(NULL == fh->fmt);
699 if (fh->width < 48 || fh->width > norm_maxw() ||
700 fh->height < 32 || fh->height > norm_maxh())
701 return -EINVAL;
702 buf->vb.size = fh->width*fh->height*2;
703 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
704 return -EINVAL;
705
706 if (buf->fmt != fh->fmt ||
707 buf->vb.width != fh->width ||
708 buf->vb.height != fh->height ||
709 buf->vb.field != field) {
710 buf->fmt = fh->fmt;
711 buf->vb.width = fh->width;
712 buf->vb.height = fh->height;
713 buf->vb.field = field;
714 init_buffer = 1;
715 }
716
717 if (STATE_NEEDS_INIT == buf->vb.state) {
718 if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
719 goto fail;
720 }
721
722 buf->vb.state = STATE_PREPARED;
723
724 if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) {
725 rc=-ENOMEM;
726 goto fail;
727 }
728
729 return 0;
730
731fail:
732 free_buffer(vq,buf);
733 return rc;
734}
735
736static void
737buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
738{
739 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
740 struct vivi_fh *fh = vq->priv_data;
741 struct vivi_dev *dev = fh->dev;
742 struct vivi_dmaqueue *vidq = &dev->vidq;
743 struct vivi_buffer *prev;
744
745 if (!list_empty(&vidq->queued)) {
746 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
747 list_add_tail(&buf->vb.queue,&vidq->queued);
748 buf->vb.state = STATE_QUEUED;
749 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
750 buf, buf->vb.i);
751 } else if (list_empty(&vidq->active)) {
752 list_add_tail(&buf->vb.queue,&vidq->active);
753
754 buf->vb.state = STATE_ACTIVE;
755 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
756 dprintk(2,"[%p/%d] buffer_queue - first active\n",
757 buf, buf->vb.i);
758
759 vivi_start_thread(vidq);
760 } else {
761 prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
762 if (prev->vb.width == buf->vb.width &&
763 prev->vb.height == buf->vb.height &&
764 prev->fmt == buf->fmt) {
765 list_add_tail(&buf->vb.queue,&vidq->active);
766 buf->vb.state = STATE_ACTIVE;
767 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
768 buf, buf->vb.i);
769
770 } else {
771 list_add_tail(&buf->vb.queue,&vidq->queued);
772 buf->vb.state = STATE_QUEUED;
773 dprintk(2,"[%p/%d] buffer_queue - first queued\n",
774 buf, buf->vb.i);
775 }
776 }
777}
778
779static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
780{
781 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
782 struct vivi_fh *fh = vq->priv_data;
783 struct vivi_dev *dev = (struct vivi_dev*)fh->dev;
784 struct vivi_dmaqueue *vidq = &dev->vidq;
785
786 dprintk(1,"%s\n",__FUNCTION__);
787
788 vivi_stop_thread(vidq);
789
790 free_buffer(vq,buf);
791}
792
793int vivi_map_sg (void *dev, struct scatterlist *sg, int nents,
794 int direction)
795{
796 int i;
797
798 dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents);
799 BUG_ON(direction == DMA_NONE);
800
801 for (i = 0; i < nents; i++ ) {
802 BUG_ON(!sg[i].page);
803
804 sg[i].dma_address = page_to_phys(sg[i].page) + sg[i].offset;
805 }
806
807 return nents;
808}
809
810int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages,
811 int direction)
812{
813 dprintk(1,"%s\n",__FUNCTION__);
814 return 0;
815}
816
817int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist,int nr_pages,
818 int direction)
819{
820// dprintk(1,"%s\n",__FUNCTION__);
821
822// flush_write_buffers();
823 return 0;
824}
825
826static struct videobuf_queue_ops vivi_video_qops = {
827 .buf_setup = buffer_setup,
828 .buf_prepare = buffer_prepare,
829 .buf_queue = buffer_queue,
830 .buf_release = buffer_release,
831
832 /* Non-pci handling routines */
833 .vb_map_sg = vivi_map_sg,
834 .vb_dma_sync_sg = vivi_dma_sync_sg,
835 .vb_unmap_sg = vivi_unmap_sg,
836};
837
838/* ------------------------------------------------------------------
839 IOCTL handling
840 ------------------------------------------------------------------*/
841
842static int vivi_try_fmt(struct vivi_dev *dev, struct vivi_fh *fh,
843 struct v4l2_format *f)
844{
845 struct vivi_fmt *fmt;
846 enum v4l2_field field;
847 unsigned int maxw, maxh;
848
849 if (format.fourcc != f->fmt.pix.pixelformat) {
850 dprintk(1,"Fourcc format invalid.\n");
851 return -EINVAL;
852 }
853 fmt=&format;
854
855 field = f->fmt.pix.field;
856
857 if (field == V4L2_FIELD_ANY) {
858// field=V4L2_FIELD_INTERLACED;
859 field=V4L2_FIELD_SEQ_TB;
860 } else if (V4L2_FIELD_INTERLACED != field) {
861 dprintk(1,"Field type invalid.\n");
862 return -EINVAL;
863 }
864
865 maxw = norm_maxw();
866 maxh = norm_maxh();
867
868 f->fmt.pix.field = field;
869 if (f->fmt.pix.height < 32)
870 f->fmt.pix.height = 32;
871 if (f->fmt.pix.height > maxh)
872 f->fmt.pix.height = maxh;
873 if (f->fmt.pix.width < 48)
874 f->fmt.pix.width = 48;
875 if (f->fmt.pix.width > maxw)
876 f->fmt.pix.width = maxw;
877 f->fmt.pix.width &= ~0x03;
878 f->fmt.pix.bytesperline =
879 (f->fmt.pix.width * fmt->depth) >> 3;
880 f->fmt.pix.sizeimage =
881 f->fmt.pix.height * f->fmt.pix.bytesperline;
882
883 return 0;
884}
885
886static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
887{
888 /* is it free? */
889 down(&dev->lock);
890 if (dev->resources) {
891 /* no, someone else uses it */
892 up(&dev->lock);
893 return 0;
894 }
895 /* it's free, grab it */
896 dev->resources =1;
897 dprintk(1,"res: get\n");
898 up(&dev->lock);
899 return 1;
900}
901
902static inline int res_locked(struct vivi_dev *dev)
903{
904 return (dev->resources);
905}
906
907static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
908{
909 down(&dev->lock);
910 dev->resources = 0;
911 dprintk(1,"res: put\n");
912 up(&dev->lock);
913}
914
915static int vivi_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg)
916{
917 struct vivi_fh *fh = file->private_data;
918 struct vivi_dev *dev = fh->dev;
919 int ret=0;
920
921 if (debug) {
922 if (_IOC_DIR(cmd) & _IOC_WRITE)
923 v4l_printk_ioctl_arg("vivi(w)",cmd, arg);
924 else if (!_IOC_DIR(cmd) & _IOC_READ) {
925 v4l_print_ioctl("vivi", cmd);
926 }
927 }
928
929 switch(cmd) {
930 /* --- capabilities ------------------------------------------ */
931 case VIDIOC_QUERYCAP:
932 {
933 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
934
935 memset(cap, 0, sizeof(*cap));
936
937 strcpy(cap->driver, "vivi");
938 strcpy(cap->card, "vivi");
939 cap->version = VIVI_VERSION;
940 cap->capabilities =
941 V4L2_CAP_VIDEO_CAPTURE |
942 V4L2_CAP_STREAMING |
943 V4L2_CAP_READWRITE;
944 break;
945 }
946 /* --- capture ioctls ---------------------------------------- */
947 case VIDIOC_ENUM_FMT:
948 {
949 struct v4l2_fmtdesc *f = arg;
950 enum v4l2_buf_type type;
951 unsigned int index;
952
953 index = f->index;
954 type = f->type;
955
956 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
957 ret=-EINVAL;
958 break;
959 }
960
961 switch (type) {
962 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
963 if (index > 0){
964 ret=-EINVAL;
965 break;
966 }
967 memset(f,0,sizeof(*f));
968
969 f->index = index;
970 f->type = type;
971 strlcpy(f->description,format.name,sizeof(f->description));
972 f->pixelformat = format.fourcc;
973 break;
974 default:
975 ret=-EINVAL;
976 }
977 break;
978 }
979 case VIDIOC_G_FMT:
980 {
981 struct v4l2_format *f = (struct v4l2_format *)arg;
982
983 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
984 ret=-EINVAL;
985 break;
986 }
987
988 memset(&f->fmt.pix,0,sizeof(f->fmt.pix));
989 f->fmt.pix.width = fh->width;
990 f->fmt.pix.height = fh->height;
991 f->fmt.pix.field = fh->vb_vidq.field;
992 f->fmt.pix.pixelformat = fh->fmt->fourcc;
993 f->fmt.pix.bytesperline =
994 (f->fmt.pix.width * fh->fmt->depth) >> 3;
995 f->fmt.pix.sizeimage =
996 f->fmt.pix.height * f->fmt.pix.bytesperline;
997 break;
998 }
999 case VIDIOC_S_FMT:
1000 {
1001 struct v4l2_format *f = arg;
1002
1003 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1004 dprintk(1,"Only capture supported.\n");
1005 ret=-EINVAL;
1006 break;
1007 }
1008
1009 ret = vivi_try_fmt(dev,fh,f);
1010 if (ret < 0)
1011 break;
1012
1013 fh->fmt = &format;
1014 fh->width = f->fmt.pix.width;
1015 fh->height = f->fmt.pix.height;
1016 fh->vb_vidq.field = f->fmt.pix.field;
1017 fh->type = f->type;
1018
1019 break;
1020 }
1021 case VIDIOC_TRY_FMT:
1022 {
1023 struct v4l2_format *f = arg;
1024 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1025 ret=-EINVAL;
1026 break;
1027 }
1028
1029 ret=vivi_try_fmt(dev,fh,f);
1030 break;
1031 }
1032 case VIDIOC_REQBUFS:
1033 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1034 ret=-EINVAL;
1035 break;
1036 }
1037 ret=videobuf_reqbufs(&fh->vb_vidq, arg);
1038 break;
1039 case VIDIOC_QUERYBUF:
1040 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1041 ret=-EINVAL;
1042 break;
1043 }
1044 ret=videobuf_querybuf(&fh->vb_vidq, arg);
1045 break;
1046 case VIDIOC_QBUF:
1047 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1048 ret=-EINVAL;
1049 break;
1050 }
1051 ret=videobuf_qbuf(&fh->vb_vidq, arg);
1052 break;
1053 case VIDIOC_DQBUF:
1054 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1055 ret=-EINVAL;
1056 break;
1057 }
1058 ret=videobuf_dqbuf(&fh->vb_vidq, arg,
1059 file->f_flags & O_NONBLOCK);
1060 break;
1061#ifdef HAVE_V4L1
1062 /* --- streaming capture ------------------------------------- */
1063 case VIDIOCGMBUF:
1064 {
1065 struct video_mbuf *mbuf = arg;
1066 struct videobuf_queue *q=&fh->vb_vidq;
1067 struct v4l2_requestbuffers req;
1068 unsigned int i;
1069
1070 memset(&req,0,sizeof(req));
1071 req.type = q->type;
1072 req.count = 8;
1073 req.memory = V4L2_MEMORY_MMAP;
1074 ret = videobuf_reqbufs(q,&req);
1075 if (ret < 0)
1076 break;
1077 memset(mbuf,0,sizeof(*mbuf));
1078 mbuf->frames = req.count;
1079 mbuf->size = 0;
1080 for (i = 0; i < mbuf->frames; i++) {
1081 mbuf->offsets[i] = q->bufs[i]->boff;
1082 mbuf->size += q->bufs[i]->bsize;
1083 }
1084 break;
1085 }
1086#endif
1087 case VIDIOC_STREAMON:
1088 {
1089 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1090 return -EINVAL;
1091 if (!res_get(dev,fh))
1092 return -EBUSY;
1093 ret=videobuf_streamon(&fh->vb_vidq);
1094 break;
1095 }
1096 case VIDIOC_STREAMOFF:
1097 {
1098 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1099 ret=-EINVAL;
1100 break;
1101 }
1102 ret = videobuf_streamoff(&fh->vb_vidq);
1103 if (ret < 0)
1104 break;
1105 res_free(dev,fh);
1106 break;
1107 }
1108 /* ---------- tv norms ---------- */
1109 case VIDIOC_ENUMSTD:
1110 {
1111 struct v4l2_standard *e = arg;
1112
1113 if (e->index>0) {
1114 ret=-EINVAL;
1115 break;
1116 }
1117 ret = v4l2_video_std_construct(e, V4L2_STD_NTSC_M, "NTSC-M");
1118
1119 /* Allows vivi to use different fps from video std */
1120 e->frameperiod.numerator = WAKE_NUMERATOR;
1121 e->frameperiod.denominator = WAKE_DENOMINATOR;
1122
1123 break;
1124 }
1125 case VIDIOC_G_STD:
1126 {
1127 v4l2_std_id *id = arg;
1128
1129 *id = V4L2_STD_NTSC_M;
1130 break;
1131 }
1132 case VIDIOC_S_STD:
1133 {
1134 break;
1135 }
1136 /* ------ input switching ---------- */
1137 case VIDIOC_ENUMINPUT:
1138 { /* only one input in this sample driver */
1139 struct v4l2_input *inp = arg;
1140
1141 if (inp->index != 0) {
1142 ret=-EINVAL;
1143 break;
1144 }
1145 memset(inp, 0, sizeof(*inp));
1146
1147 inp->index = 0;
1148 inp->type = V4L2_INPUT_TYPE_CAMERA;
1149 inp->std = V4L2_STD_NTSC_M;
1150 strcpy(inp->name,"Camera");
1151 break;
1152 }
1153 case VIDIOC_G_INPUT:
1154 {
1155 unsigned int *i = arg;
1156
1157 *i = 0;
1158 break;
1159 }
1160 case VIDIOC_S_INPUT:
1161 {
1162 unsigned int *i = arg;
1163
1164 if (*i > 0)
1165 ret=-EINVAL;
1166 break;
1167 }
1168
1169 /* --- controls ---------------------------------------------- */
1170 case VIDIOC_QUERYCTRL:
1171 {
1172 struct v4l2_queryctrl *qc = arg;
1173 int i;
1174
1175 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1176 if (qc->id && qc->id == vivi_qctrl[i].id) {
1177 memcpy(qc, &(vivi_qctrl[i]),
1178 sizeof(*qc));
1179 break;
1180 }
1181
1182 ret=-EINVAL;
1183 break;
1184 }
1185 case VIDIOC_G_CTRL:
1186 {
1187 struct v4l2_control *ctrl = arg;
1188 int i;
1189
1190 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1191 if (ctrl->id == vivi_qctrl[i].id) {
1192 ctrl->value=qctl_regs[i];
1193 break;
1194 }
1195
1196 ret=-EINVAL;
1197 break;
1198 }
1199 case VIDIOC_S_CTRL:
1200 {
1201 struct v4l2_control *ctrl = arg;
1202 int i;
1203 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1204 if (ctrl->id == vivi_qctrl[i].id) {
1205 if (ctrl->value <
1206 vivi_qctrl[i].minimum
1207 || ctrl->value >
1208 vivi_qctrl[i].maximum) {
1209 ret=-ERANGE;
1210 break;
1211 }
1212 qctl_regs[i]=ctrl->value;
1213 break;
1214 }
1215 ret=-EINVAL;
1216 break;
1217 }
1218 default:
1219 ret=v4l_compat_translate_ioctl(inode,file,cmd,arg,vivi_do_ioctl);
1220 }
1221
1222 if (debug) {
1223 if (ret<0) {
1224 v4l_print_ioctl("vivi(err)", cmd);
1225 dprintk(1,"errcode=%d\n",ret);
1226 } else if (_IOC_DIR(cmd) & _IOC_READ)
1227 v4l_printk_ioctl_arg("vivi(r)",cmd, arg);
1228 }
1229
1230 return ret;
1231}
1232
1233static int vivi_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1234{
1235 return video_usercopy(inode, file, cmd, arg, vivi_do_ioctl);
1236}
1237
1238/* ------------------------------------------------------------------
1239 File operations for the device
1240 ------------------------------------------------------------------*/
1241
1242#define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1243
1244static int vivi_open(struct inode *inode, struct file *file)
1245{
1246 int minor = iminor(inode);
1247 struct vivi_dev *h,*dev = NULL;
1248 struct vivi_fh *fh;
1249 struct list_head *list;
1250 enum v4l2_buf_type type = 0;
1251 int i;
1252
1253 printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
1254
1255 list_for_each(list,&vivi_devlist) {
1256 h = list_entry(list, struct vivi_dev, vivi_devlist);
1257 if (h->video_dev.minor == minor) {
1258 dev = h;
1259 type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1260 }
1261 }
1262 if (NULL == dev)
1263 return -ENODEV;
1264
1265
1266 /* If more than one user, mutex should be added */
1267 dev->users++;
1268
1269 dprintk(1,"open minor=%d type=%s users=%d\n",
1270 minor,v4l2_type_names[type],dev->users);
1271
1272 /* allocate + initialize per filehandle data */
1273 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
1274 if (NULL == fh) {
1275 dev->users--;
1276 return -ENOMEM;
1277 }
1278
1279 file->private_data = fh;
1280 fh->dev = dev;
1281 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1282 fh->fmt = &format;
1283 fh->width = 640;
1284 fh->height = 480;
1285
1286 /* Put all controls at a sane state */
1287 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1288 qctl_regs[i] =vivi_qctrl[i].default_value;
1289
1290 dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1291 (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
1292 dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued));
1293 dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active));
1294
1295 /* Resets frame counters */
1296 dev->h=0;
1297 dev->m=0;
1298 dev->s=0;
1299 dev->us=0;
1300 dev->jiffies=jiffies;
1301 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
1302 dev->h,dev->m,dev->s,(dev->us+500)/1000);
1303
1304 videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops,
1305 NULL, NULL,
1306 fh->type,
1307 V4L2_FIELD_INTERLACED,
1308 sizeof(struct vivi_buffer),fh);
1309
1310 return 0;
1311}
1312
1313static ssize_t
1314vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1315{
1316 struct vivi_fh *fh = file->private_data;
1317
1318 if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1319 if (res_locked(fh->dev))
1320 return -EBUSY;
1321 return videobuf_read_one(&fh->vb_vidq, data, count, ppos,
1322 file->f_flags & O_NONBLOCK);
1323 }
1324 return 0;
1325}
1326
1327static unsigned int
1328vivi_poll(struct file *file, struct poll_table_struct *wait)
1329{
1330 struct vivi_fh *fh = file->private_data;
1331 struct vivi_buffer *buf;
1332
1333 dprintk(1,"%s\n",__FUNCTION__);
1334
1335 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1336 return POLLERR;
1337
1338 if (res_get(fh->dev,fh)) {
1339 dprintk(1,"poll: mmap interface\n");
1340 /* streaming capture */
1341 if (list_empty(&fh->vb_vidq.stream))
1342 return POLLERR;
1343 buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream);
1344 } else {
1345 dprintk(1,"poll: read() interface\n");
1346 /* read() capture */
1347 buf = (struct vivi_buffer*)fh->vb_vidq.read_buf;
1348 if (NULL == buf)
1349 return POLLERR;
1350 }
1351 poll_wait(file, &buf->vb.done, wait);
1352 if (buf->vb.state == STATE_DONE ||
1353 buf->vb.state == STATE_ERROR)
1354 return POLLIN|POLLRDNORM;
1355 return 0;
1356}
1357
1358static int vivi_release(struct inode *inode, struct file *file)
1359{
1360 struct vivi_fh *fh = file->private_data;
1361 struct vivi_dev *dev = fh->dev;
1362 struct vivi_dmaqueue *vidq = &dev->vidq;
1363
1364 int minor = iminor(inode);
1365
1366 vivi_stop_thread(vidq);
1367 videobuf_mmap_free(&fh->vb_vidq);
1368
1369 kfree (fh);
1370
1371 dev->users--;
1372
1373 printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users);
1374
1375 return 0;
1376}
1377
1378static int
1379vivi_mmap(struct file *file, struct vm_area_struct * vma)
1380{
1381 struct vivi_fh *fh = file->private_data;
1382 int ret;
1383
1384 dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma);
1385
1386 ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
1387
1388 dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1389 (unsigned long)vma->vm_start,
1390 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1391 ret);
1392
1393 return ret;
1394}
1395
1396static struct file_operations vivi_fops = {
1397 .owner = THIS_MODULE,
1398 .open = vivi_open,
1399 .release = vivi_release,
1400 .read = vivi_read,
1401 .poll = vivi_poll,
1402 .ioctl = vivi_ioctl,
1403 .mmap = vivi_mmap,
1404 .llseek = no_llseek,
1405};
1406
1407static struct video_device vivi = {
1408 .name = "VTM Virtual Video Capture Board",
1409 .type = VID_TYPE_CAPTURE,
1410 .hardware = 0,
1411 .fops = &vivi_fops,
1412 .minor = -1,
1413// .release = video_device_release,
1414};
1415/* ------------------------------------------------------------------
1416 Initialization and module stuff
1417 ------------------------------------------------------------------*/
1418
1419static int __init vivi_init(void)
1420{
1421 int ret;
1422 struct vivi_dev *dev;
1423
1424 dev = kzalloc(sizeof(*dev),GFP_KERNEL);
1425 if (NULL == dev)
1426 return -ENOMEM;
1427 list_add_tail(&dev->vivi_devlist,&vivi_devlist);
1428
1429 /* init video dma queues */
1430 INIT_LIST_HEAD(&dev->vidq.active);
1431 INIT_LIST_HEAD(&dev->vidq.queued);
1432
1433 /* initialize locks */
1434 init_MUTEX(&dev->lock);
1435
1436 dev->vidq.timeout.function = vivi_vid_timeout;
1437 dev->vidq.timeout.data = (unsigned long)dev;
1438 init_timer(&dev->vidq.timeout);
1439
1440 ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
1441 printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
1442 return ret;
1443}
1444
1445static void __exit vivi_exit(void)
1446{
1447 struct vivi_dev *h;
1448 struct list_head *list;
1449
1450 list_for_each(list,&vivi_devlist) {
1451 h = list_entry(list, struct vivi_dev, vivi_devlist);
1452 kfree (h);
1453 }
1454 video_unregister_device(&vivi);
1455}
1456
1457module_init(vivi_init);
1458module_exit(vivi_exit);
kernel source for telekom puls (alcatel/mediatek)