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[deliverable/linux.git] / drivers / media / video / vivi.c
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/dma-mapping.h>
30 #ifdef CONFIG_VIDEO_V4L1_COMPAT
31 /* Include V4L1 specific functions. Should be removed soon */
32 #include <linux/videodev.h>
33 #endif
34 #include <linux/interrupt.h>
35 #include <media/video-buf.h>
36 #include <media/v4l2-common.h>
37 #include <linux/kthread.h>
38 #include <linux/highmem.h>
39 #include <linux/freezer.h>
40
41 /* Wake up at about 30 fps */
42 #define WAKE_NUMERATOR 30
43 #define WAKE_DENOMINATOR 1001
44 #define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
45
46 /* These timers are for 1 fps - used only for testing */
47 //#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
48 //#define BUFFER_TIMEOUT msecs_to_jiffies(5000) /* 5 seconds */
49
50 #include "font.h"
51
52 #define VIVI_MAJOR_VERSION 0
53 #define VIVI_MINOR_VERSION 4
54 #define VIVI_RELEASE 0
55 #define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
56
57 /* Declare static vars that will be used as parameters */
58 static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
59 static struct video_device vivi; /* Video device */
60 static int video_nr = -1; /* /dev/videoN, -1 for autodetect */
61
62 /* supported controls */
63 static struct v4l2_queryctrl vivi_qctrl[] = {
64 {
65 .id = V4L2_CID_AUDIO_VOLUME,
66 .name = "Volume",
67 .minimum = 0,
68 .maximum = 65535,
69 .step = 65535/100,
70 .default_value = 65535,
71 .flags = 0,
72 .type = V4L2_CTRL_TYPE_INTEGER,
73 },{
74 .id = V4L2_CID_BRIGHTNESS,
75 .type = V4L2_CTRL_TYPE_INTEGER,
76 .name = "Brightness",
77 .minimum = 0,
78 .maximum = 255,
79 .step = 1,
80 .default_value = 127,
81 .flags = 0,
82 }, {
83 .id = V4L2_CID_CONTRAST,
84 .type = V4L2_CTRL_TYPE_INTEGER,
85 .name = "Contrast",
86 .minimum = 0,
87 .maximum = 255,
88 .step = 0x1,
89 .default_value = 0x10,
90 .flags = 0,
91 }, {
92 .id = V4L2_CID_SATURATION,
93 .type = V4L2_CTRL_TYPE_INTEGER,
94 .name = "Saturation",
95 .minimum = 0,
96 .maximum = 255,
97 .step = 0x1,
98 .default_value = 127,
99 .flags = 0,
100 }, {
101 .id = V4L2_CID_HUE,
102 .type = V4L2_CTRL_TYPE_INTEGER,
103 .name = "Hue",
104 .minimum = -128,
105 .maximum = 127,
106 .step = 0x1,
107 .default_value = 0,
108 .flags = 0,
109 }
110 };
111
112 static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
113
114 #define dprintk(level,fmt, arg...) \
115 do { \
116 if (vivi.debug >= (level)) \
117 printk(KERN_DEBUG "vivi: " fmt , ## arg); \
118 } while (0)
119
120 /* ------------------------------------------------------------------
121 Basic structures
122 ------------------------------------------------------------------*/
123
124 struct vivi_fmt {
125 char *name;
126 u32 fourcc; /* v4l2 format id */
127 int depth;
128 };
129
130 static struct vivi_fmt format = {
131 .name = "4:2:2, packed, YUYV",
132 .fourcc = V4L2_PIX_FMT_YUYV,
133 .depth = 16,
134 };
135
136 struct sg_to_addr {
137 int pos;
138 struct scatterlist *sg;
139 };
140
141 /* buffer for one video frame */
142 struct vivi_buffer {
143 /* common v4l buffer stuff -- must be first */
144 struct videobuf_buffer vb;
145
146 struct vivi_fmt *fmt;
147
148 #ifdef CONFIG_VIVI_SCATTER
149 struct sg_to_addr *to_addr;
150 #endif
151 };
152
153 struct vivi_dmaqueue {
154 struct list_head active;
155 struct list_head queued;
156 struct timer_list timeout;
157
158 /* thread for generating video stream*/
159 struct task_struct *kthread;
160 wait_queue_head_t wq;
161 /* Counters to control fps rate */
162 int frame;
163 int ini_jiffies;
164 };
165
166 static LIST_HEAD(vivi_devlist);
167
168 struct vivi_dev {
169 struct list_head vivi_devlist;
170
171 struct semaphore lock;
172
173 int users;
174
175 /* various device info */
176 unsigned int resources;
177 struct video_device vfd;
178
179 struct vivi_dmaqueue vidq;
180
181 /* Several counters */
182 int h,m,s,us,jiffies;
183 char timestr[13];
184 };
185
186 struct vivi_fh {
187 struct vivi_dev *dev;
188
189 /* video capture */
190 struct vivi_fmt *fmt;
191 unsigned int width,height;
192 struct videobuf_queue vb_vidq;
193
194 enum v4l2_buf_type type;
195 };
196
197 /* ------------------------------------------------------------------
198 DMA and thread functions
199 ------------------------------------------------------------------*/
200
201 /* Bars and Colors should match positions */
202
203 enum colors {
204 WHITE,
205 AMBAR,
206 CYAN,
207 GREEN,
208 MAGENTA,
209 RED,
210 BLUE
211 };
212
213 static u8 bars[8][3] = {
214 /* R G B */
215 {204,204,204}, /* white */
216 {208,208, 0}, /* ambar */
217 { 0,206,206}, /* cyan */
218 { 0,239, 0}, /* green */
219 {239, 0,239}, /* magenta */
220 {205, 0, 0}, /* red */
221 { 0, 0,255}, /* blue */
222 { 0, 0, 0}
223 };
224
225 #define TO_Y(r,g,b) (((16829*r +33039*g +6416*b + 32768)>>16)+16)
226 /* RGB to V(Cr) Color transform */
227 #define TO_V(r,g,b) (((28784*r -24103*g -4681*b + 32768)>>16)+128)
228 /* RGB to U(Cb) Color transform */
229 #define TO_U(r,g,b) (((-9714*r -19070*g +28784*b + 32768)>>16)+128)
230
231 #define TSTAMP_MIN_Y 24
232 #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
233 #define TSTAMP_MIN_X 64
234
235 #ifdef CONFIG_VIVI_SCATTER
236 static void prep_to_addr(struct sg_to_addr to_addr[],
237 struct videobuf_buffer *vb)
238 {
239 int i, pos=0;
240
241 for (i=0;i<vb->dma.nr_pages;i++) {
242 to_addr[i].sg=&vb->dma.sglist[i];
243 to_addr[i].pos=pos;
244 pos += vb->dma.sglist[i].length;
245 }
246 }
247
248 static int get_addr_pos(int pos, int pages, struct sg_to_addr to_addr[])
249 {
250 int p1=0,p2=pages-1,p3=pages/2;
251
252 /* Sanity test */
253 BUG_ON (pos>=to_addr[p2].pos+to_addr[p2].sg->length);
254
255 while (p1+1<p2) {
256 if (pos < to_addr[p3].pos) {
257 p2=p3;
258 } else {
259 p1=p3;
260 }
261 p3=(p1+p2)/2;
262 }
263 if (pos >= to_addr[p2].pos)
264 p1=p2;
265
266 return (p1);
267 }
268 #endif
269
270 #ifdef CONFIG_VIVI_SCATTER
271 static void gen_line(struct sg_to_addr to_addr[],int inipos,int pages,int wmax,
272 int hmax, int line, char *timestr)
273 #else
274 static void gen_line(char *basep,int inipos,int wmax,
275 int hmax, int line, char *timestr)
276 #endif
277 {
278 int w,i,j,pos=inipos,y;
279 char *p,*s;
280 u8 chr,r,g,b,color;
281 #ifdef CONFIG_VIVI_SCATTER
282 int pgpos,oldpg;
283 char *basep;
284 struct page *pg;
285
286 unsigned long flags;
287 spinlock_t spinlock;
288
289 spin_lock_init(&spinlock);
290
291 /* Get first addr pointed to pixel position */
292 oldpg=get_addr_pos(pos,pages,to_addr);
293 pg=pfn_to_page(sg_dma_address(to_addr[oldpg].sg) >> PAGE_SHIFT);
294 spin_lock_irqsave(&spinlock,flags);
295 basep = kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[oldpg].sg->offset;
296 #endif
297
298 /* We will just duplicate the second pixel at the packet */
299 wmax/=2;
300
301 /* Generate a standard color bar pattern */
302 for (w=0;w<wmax;w++) {
303 r=bars[w*7/wmax][0];
304 g=bars[w*7/wmax][1];
305 b=bars[w*7/wmax][2];
306
307 for (color=0;color<4;color++) {
308 #ifdef CONFIG_VIVI_SCATTER
309 pgpos=get_addr_pos(pos,pages,to_addr);
310 if (pgpos!=oldpg) {
311 pg=pfn_to_page(sg_dma_address(to_addr[pgpos].sg) >> PAGE_SHIFT);
312 kunmap_atomic(basep, KM_BOUNCE_READ);
313 basep= kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[pgpos].sg->offset;
314 oldpg=pgpos;
315 }
316 p=basep+pos-to_addr[pgpos].pos;
317 #else
318 p=basep+pos;
319 #endif
320
321 switch (color) {
322 case 0:
323 case 2:
324 *p=TO_Y(r,g,b); /* Luminance */
325 break;
326 case 1:
327 *p=TO_U(r,g,b); /* Cb */
328 break;
329 case 3:
330 *p=TO_V(r,g,b); /* Cr */
331 break;
332 }
333 pos++;
334 }
335 }
336
337 /* Checks if it is possible to show timestamp */
338 if (TSTAMP_MAX_Y>=hmax)
339 goto end;
340 if (TSTAMP_MIN_X+strlen(timestr)>=wmax)
341 goto end;
342
343 /* Print stream time */
344 if (line>=TSTAMP_MIN_Y && line<=TSTAMP_MAX_Y) {
345 j=TSTAMP_MIN_X;
346 for (s=timestr;*s;s++) {
347 chr=rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
348 for (i=0;i<7;i++) {
349 if (chr&1<<(7-i)) { /* Font color*/
350 r=bars[BLUE][0];
351 g=bars[BLUE][1];
352 b=bars[BLUE][2];
353 r=g=b=0;
354 g=198;
355 } else { /* Background color */
356 r=bars[WHITE][0];
357 g=bars[WHITE][1];
358 b=bars[WHITE][2];
359 r=g=b=0;
360 }
361
362 pos=inipos+j*2;
363 for (color=0;color<4;color++) {
364 #ifdef CONFIG_VIVI_SCATTER
365 pgpos=get_addr_pos(pos,pages,to_addr);
366 if (pgpos!=oldpg) {
367 pg=pfn_to_page(sg_dma_address(
368 to_addr[pgpos].sg)
369 >> PAGE_SHIFT);
370 kunmap_atomic(basep,
371 KM_BOUNCE_READ);
372 basep= kmap_atomic(pg,
373 KM_BOUNCE_READ)+
374 to_addr[pgpos].sg->offset;
375 oldpg=pgpos;
376 }
377 p=basep+pos-to_addr[pgpos].pos;
378 #else
379 p=basep+pos;
380 #endif
381
382 y=TO_Y(r,g,b);
383
384 switch (color) {
385 case 0:
386 case 2:
387 *p=TO_Y(r,g,b); /* Luminance */
388 break;
389 case 1:
390 *p=TO_U(r,g,b); /* Cb */
391 break;
392 case 3:
393 *p=TO_V(r,g,b); /* Cr */
394 break;
395 }
396 pos++;
397 }
398 j++;
399 }
400 }
401 }
402
403
404 end:
405 #ifdef CONFIG_VIVI_SCATTER
406 kunmap_atomic(basep, KM_BOUNCE_READ);
407 spin_unlock_irqrestore(&spinlock,flags);
408 #else
409 return;
410 #endif
411 }
412 static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf)
413 {
414 int h,pos=0;
415 int hmax = buf->vb.height;
416 int wmax = buf->vb.width;
417 struct timeval ts;
418 #ifdef CONFIG_VIVI_SCATTER
419 struct sg_to_addr *to_addr=buf->to_addr;
420 struct videobuf_buffer *vb=&buf->vb;
421 #else
422 char *tmpbuf;
423 #endif
424
425 #ifdef CONFIG_VIVI_SCATTER
426 /* Test if DMA mapping is ready */
427 if (!sg_dma_address(&vb->dma.sglist[0]))
428 return;
429
430 prep_to_addr(to_addr,vb);
431
432 /* Check if there is enough memory */
433 BUG_ON(buf->vb.dma.nr_pages << PAGE_SHIFT < (buf->vb.width*buf->vb.height)*2);
434 #else
435 if (buf->vb.dma.varea) {
436 tmpbuf=kmalloc (wmax*2, GFP_KERNEL);
437 } else {
438 tmpbuf=buf->vb.dma.vmalloc;
439 }
440
441 #endif
442
443 for (h=0;h<hmax;h++) {
444 #ifdef CONFIG_VIVI_SCATTER
445 gen_line(to_addr,pos,vb->dma.nr_pages,wmax,hmax,h,dev->timestr);
446 #else
447 if (buf->vb.dma.varea) {
448 gen_line(tmpbuf,0,wmax,hmax,h,dev->timestr);
449 /* FIXME: replacing to __copy_to_user */
450 if (copy_to_user(buf->vb.dma.varea+pos,tmpbuf,wmax*2)!=0)
451 dprintk(2,"vivifill copy_to_user failed.\n");
452 } else {
453 gen_line(tmpbuf,pos,wmax,hmax,h,dev->timestr);
454 }
455 #endif
456 pos += wmax*2;
457 }
458
459 /* Updates stream time */
460
461 dev->us+=jiffies_to_usecs(jiffies-dev->jiffies);
462 dev->jiffies=jiffies;
463 if (dev->us>=1000000) {
464 dev->us-=1000000;
465 dev->s++;
466 if (dev->s>=60) {
467 dev->s-=60;
468 dev->m++;
469 if (dev->m>60) {
470 dev->m-=60;
471 dev->h++;
472 if (dev->h>24)
473 dev->h-=24;
474 }
475 }
476 }
477 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
478 dev->h,dev->m,dev->s,(dev->us+500)/1000);
479
480 dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr,
481 (unsigned long)buf->vb.dma.varea,pos);
482
483 /* Advice that buffer was filled */
484 buf->vb.state = STATE_DONE;
485 buf->vb.field_count++;
486 do_gettimeofday(&ts);
487 buf->vb.ts = ts;
488
489 list_del(&buf->vb.queue);
490 wake_up(&buf->vb.done);
491 }
492
493 static int restart_video_queue(struct vivi_dmaqueue *dma_q);
494
495 static void vivi_thread_tick(struct vivi_dmaqueue *dma_q)
496 {
497 struct vivi_buffer *buf;
498 struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq);
499
500 int bc;
501
502 /* Announces videobuf that all went ok */
503 for (bc = 0;; bc++) {
504 if (list_empty(&dma_q->active)) {
505 dprintk(1,"No active queue to serve\n");
506 break;
507 }
508
509 buf = list_entry(dma_q->active.next,
510 struct vivi_buffer, vb.queue);
511
512 /* Nobody is waiting something to be done, just return */
513 if (!waitqueue_active(&buf->vb.done)) {
514 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
515 return;
516 }
517
518 do_gettimeofday(&buf->vb.ts);
519 dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i);
520
521 /* Fill buffer */
522 vivi_fillbuff(dev,buf);
523
524 if (list_empty(&dma_q->active)) {
525 del_timer(&dma_q->timeout);
526 } else {
527 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
528 }
529 }
530 if (bc != 1)
531 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc);
532 }
533
534 static void vivi_sleep(struct vivi_dmaqueue *dma_q)
535 {
536 int timeout;
537 DECLARE_WAITQUEUE(wait, current);
538
539 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
540
541 add_wait_queue(&dma_q->wq, &wait);
542 if (!kthread_should_stop()) {
543 dma_q->frame++;
544
545 /* Calculate time to wake up */
546 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
547
548 if (timeout <= 0) {
549 int old=dma_q->frame;
550 dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1;
551
552 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
553
554 dprintk(1,"underrun, losed %d frames. "
555 "Now, frame is %d. Waking on %d jiffies\n",
556 dma_q->frame-old,dma_q->frame,timeout);
557 } else
558 dprintk(1,"will sleep for %i jiffies\n",timeout);
559
560 vivi_thread_tick(dma_q);
561
562 schedule_timeout_interruptible (timeout);
563 }
564
565 remove_wait_queue(&dma_q->wq, &wait);
566 try_to_freeze();
567 }
568
569 static int vivi_thread(void *data)
570 {
571 struct vivi_dmaqueue *dma_q=data;
572
573 dprintk(1,"thread started\n");
574
575 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
576
577 for (;;) {
578 vivi_sleep(dma_q);
579
580 if (kthread_should_stop())
581 break;
582 }
583 dprintk(1, "thread: exit\n");
584 return 0;
585 }
586
587 static int vivi_start_thread(struct vivi_dmaqueue *dma_q)
588 {
589 dma_q->frame=0;
590 dma_q->ini_jiffies=jiffies;
591
592 dprintk(1,"%s\n",__FUNCTION__);
593
594 dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
595
596 if (IS_ERR(dma_q->kthread)) {
597 printk(KERN_ERR "vivi: kernel_thread() failed\n");
598 return PTR_ERR(dma_q->kthread);
599 }
600 /* Wakes thread */
601 wake_up_interruptible(&dma_q->wq);
602
603 dprintk(1,"returning from %s\n",__FUNCTION__);
604 return 0;
605 }
606
607 static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
608 {
609 dprintk(1,"%s\n",__FUNCTION__);
610 /* shutdown control thread */
611 if (dma_q->kthread) {
612 kthread_stop(dma_q->kthread);
613 dma_q->kthread=NULL;
614 }
615 }
616
617 static int restart_video_queue(struct vivi_dmaqueue *dma_q)
618 {
619 struct vivi_buffer *buf, *prev;
620 struct list_head *item;
621
622 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
623
624 if (!list_empty(&dma_q->active)) {
625 buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
626 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
627 buf, buf->vb.i);
628
629 dprintk(1,"Restarting video dma\n");
630 vivi_stop_thread(dma_q);
631 // vivi_start_thread(dma_q);
632
633 /* cancel all outstanding capture / vbi requests */
634 list_for_each(item,&dma_q->active) {
635 buf = list_entry(item, struct vivi_buffer, vb.queue);
636
637 list_del(&buf->vb.queue);
638 buf->vb.state = STATE_ERROR;
639 wake_up(&buf->vb.done);
640 }
641 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
642
643 return 0;
644 }
645
646 prev = NULL;
647 for (;;) {
648 if (list_empty(&dma_q->queued))
649 return 0;
650 buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
651 if (NULL == prev) {
652 list_del(&buf->vb.queue);
653 list_add_tail(&buf->vb.queue,&dma_q->active);
654
655 dprintk(1,"Restarting video dma\n");
656 vivi_stop_thread(dma_q);
657 vivi_start_thread(dma_q);
658
659 buf->vb.state = STATE_ACTIVE;
660 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
661 dprintk(2,"[%p/%d] restart_queue - first active\n",
662 buf,buf->vb.i);
663
664 } else if (prev->vb.width == buf->vb.width &&
665 prev->vb.height == buf->vb.height &&
666 prev->fmt == buf->fmt) {
667 list_del(&buf->vb.queue);
668 list_add_tail(&buf->vb.queue,&dma_q->active);
669 buf->vb.state = STATE_ACTIVE;
670 dprintk(2,"[%p/%d] restart_queue - move to active\n",
671 buf,buf->vb.i);
672 } else {
673 return 0;
674 }
675 prev = buf;
676 }
677 }
678
679 static void vivi_vid_timeout(unsigned long data)
680 {
681 struct vivi_dev *dev = (struct vivi_dev*)data;
682 struct vivi_dmaqueue *vidq = &dev->vidq;
683 struct vivi_buffer *buf;
684
685 while (!list_empty(&vidq->active)) {
686 buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
687 list_del(&buf->vb.queue);
688 buf->vb.state = STATE_ERROR;
689 wake_up(&buf->vb.done);
690 printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
691 }
692
693 restart_video_queue(vidq);
694 }
695
696 /* ------------------------------------------------------------------
697 Videobuf operations
698 ------------------------------------------------------------------*/
699 static int
700 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
701 {
702 struct vivi_fh *fh = vq->priv_data;
703
704 *size = fh->width*fh->height*2;
705
706 if (0 == *count)
707 *count = 32;
708 while (*size * *count > vid_limit * 1024 * 1024)
709 (*count)--;
710 return 0;
711 }
712
713 static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
714 {
715 dprintk(1,"%s\n",__FUNCTION__);
716
717 if (in_interrupt())
718 BUG();
719
720 #ifdef CONFIG_VIVI_SCATTER
721 /*FIXME: Maybe a spinlock is required here */
722 kfree(buf->to_addr);
723 buf->to_addr=NULL;
724 #endif
725
726 videobuf_waiton(&buf->vb,0,0);
727 videobuf_dma_unmap(vq, &buf->vb.dma);
728 videobuf_dma_free(&buf->vb.dma);
729 buf->vb.state = STATE_NEEDS_INIT;
730 }
731
732 #define norm_maxw() 1024
733 #define norm_maxh() 768
734 static int
735 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
736 enum v4l2_field field)
737 {
738 struct vivi_fh *fh = vq->priv_data;
739 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
740 int rc, init_buffer = 0;
741
742 // dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
743
744 BUG_ON(NULL == fh->fmt);
745 if (fh->width < 48 || fh->width > norm_maxw() ||
746 fh->height < 32 || fh->height > norm_maxh())
747 return -EINVAL;
748 buf->vb.size = fh->width*fh->height*2;
749 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
750 return -EINVAL;
751
752 if (buf->fmt != fh->fmt ||
753 buf->vb.width != fh->width ||
754 buf->vb.height != fh->height ||
755 buf->vb.field != field) {
756 buf->fmt = fh->fmt;
757 buf->vb.width = fh->width;
758 buf->vb.height = fh->height;
759 buf->vb.field = field;
760 init_buffer = 1;
761 }
762
763 if (STATE_NEEDS_INIT == buf->vb.state) {
764 if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
765 goto fail;
766 }
767
768 buf->vb.state = STATE_PREPARED;
769
770 #ifdef CONFIG_VIVI_SCATTER
771 if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) {
772 rc=-ENOMEM;
773 goto fail;
774 }
775 #endif
776 return 0;
777
778 fail:
779 free_buffer(vq,buf);
780 return rc;
781 }
782
783 static void
784 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
785 {
786 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
787 struct vivi_fh *fh = vq->priv_data;
788 struct vivi_dev *dev = fh->dev;
789 struct vivi_dmaqueue *vidq = &dev->vidq;
790 struct vivi_buffer *prev;
791
792 if (!list_empty(&vidq->queued)) {
793 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
794 list_add_tail(&buf->vb.queue,&vidq->queued);
795 buf->vb.state = STATE_QUEUED;
796 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
797 buf, buf->vb.i);
798 } else if (list_empty(&vidq->active)) {
799 list_add_tail(&buf->vb.queue,&vidq->active);
800
801 buf->vb.state = STATE_ACTIVE;
802 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
803 dprintk(2,"[%p/%d] buffer_queue - first active\n",
804 buf, buf->vb.i);
805
806 vivi_start_thread(vidq);
807 } else {
808 prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
809 if (prev->vb.width == buf->vb.width &&
810 prev->vb.height == buf->vb.height &&
811 prev->fmt == buf->fmt) {
812 list_add_tail(&buf->vb.queue,&vidq->active);
813 buf->vb.state = STATE_ACTIVE;
814 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
815 buf, buf->vb.i);
816
817 } else {
818 list_add_tail(&buf->vb.queue,&vidq->queued);
819 buf->vb.state = STATE_QUEUED;
820 dprintk(2,"[%p/%d] buffer_queue - first queued\n",
821 buf, buf->vb.i);
822 }
823 }
824 }
825
826 static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
827 {
828 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
829 struct vivi_fh *fh = vq->priv_data;
830 struct vivi_dev *dev = (struct vivi_dev*)fh->dev;
831 struct vivi_dmaqueue *vidq = &dev->vidq;
832
833 dprintk(1,"%s\n",__FUNCTION__);
834
835 vivi_stop_thread(vidq);
836
837 free_buffer(vq,buf);
838 }
839
840 #ifdef CONFIG_VIVI_SCATTER
841 static int vivi_map_sg(void *dev, struct scatterlist *sg, int nents,
842 int direction)
843 {
844 int i;
845
846 dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents);
847 BUG_ON(direction == DMA_NONE);
848
849 for (i = 0; i < nents; i++ ) {
850 BUG_ON(!sg[i].page);
851
852 sg_dma_address(&sg[i]) = page_to_phys(sg[i].page) + sg[i].offset;
853 }
854
855 return nents;
856 }
857
858 static int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages,
859 int direction)
860 {
861 dprintk(1,"%s\n",__FUNCTION__);
862 return 0;
863 }
864
865 static int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist, int nr_pages,
866 int direction)
867 {
868 // dprintk(1,"%s\n",__FUNCTION__);
869
870 // flush_write_buffers();
871 return 0;
872 }
873 #endif
874
875 static struct videobuf_queue_ops vivi_video_qops = {
876 .buf_setup = buffer_setup,
877 .buf_prepare = buffer_prepare,
878 .buf_queue = buffer_queue,
879 .buf_release = buffer_release,
880
881 /* Non-pci handling routines */
882 // .vb_map_sg = vivi_map_sg,
883 // .vb_dma_sync_sg = vivi_dma_sync_sg,
884 // .vb_unmap_sg = vivi_unmap_sg,
885 };
886
887 /* ------------------------------------------------------------------
888 IOCTL handling
889 ------------------------------------------------------------------*/
890
891
892 static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
893 {
894 /* is it free? */
895 down(&dev->lock);
896 if (dev->resources) {
897 /* no, someone else uses it */
898 up(&dev->lock);
899 return 0;
900 }
901 /* it's free, grab it */
902 dev->resources =1;
903 dprintk(1,"res: get\n");
904 up(&dev->lock);
905 return 1;
906 }
907
908 static int res_locked(struct vivi_dev *dev)
909 {
910 return (dev->resources);
911 }
912
913 static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
914 {
915 down(&dev->lock);
916 dev->resources = 0;
917 dprintk(1,"res: put\n");
918 up(&dev->lock);
919 }
920
921 /* ------------------------------------------------------------------
922 IOCTL vidioc handling
923 ------------------------------------------------------------------*/
924 static int vidioc_querycap (struct file *file, void *priv,
925 struct v4l2_capability *cap)
926 {
927 strcpy(cap->driver, "vivi");
928 strcpy(cap->card, "vivi");
929 cap->version = VIVI_VERSION;
930 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
931 V4L2_CAP_STREAMING |
932 V4L2_CAP_READWRITE;
933 return 0;
934 }
935
936 static int vidioc_enum_fmt_cap (struct file *file, void *priv,
937 struct v4l2_fmtdesc *f)
938 {
939 if (f->index > 0)
940 return -EINVAL;
941
942 strlcpy(f->description,format.name,sizeof(f->description));
943 f->pixelformat = format.fourcc;
944 return 0;
945 }
946
947 static int vidioc_g_fmt_cap (struct file *file, void *priv,
948 struct v4l2_format *f)
949 {
950 struct vivi_fh *fh=priv;
951
952 f->fmt.pix.width = fh->width;
953 f->fmt.pix.height = fh->height;
954 f->fmt.pix.field = fh->vb_vidq.field;
955 f->fmt.pix.pixelformat = fh->fmt->fourcc;
956 f->fmt.pix.bytesperline =
957 (f->fmt.pix.width * fh->fmt->depth) >> 3;
958 f->fmt.pix.sizeimage =
959 f->fmt.pix.height * f->fmt.pix.bytesperline;
960
961 return (0);
962 }
963
964 static int vidioc_try_fmt_cap (struct file *file, void *priv,
965 struct v4l2_format *f)
966 {
967 struct vivi_fmt *fmt;
968 enum v4l2_field field;
969 unsigned int maxw, maxh;
970
971 if (format.fourcc != f->fmt.pix.pixelformat) {
972 dprintk(1,"Fourcc format (0x%08x) invalid. Driver accepts "
973 "only 0x%08x\n",f->fmt.pix.pixelformat,format.fourcc);
974 return -EINVAL;
975 }
976 fmt=&format;
977
978 field = f->fmt.pix.field;
979
980 if (field == V4L2_FIELD_ANY) {
981 // field=V4L2_FIELD_INTERLACED;
982 field=V4L2_FIELD_SEQ_TB;
983 } else if (V4L2_FIELD_INTERLACED != field) {
984 dprintk(1,"Field type invalid.\n");
985 return -EINVAL;
986 }
987
988 maxw = norm_maxw();
989 maxh = norm_maxh();
990
991 f->fmt.pix.field = field;
992 if (f->fmt.pix.height < 32)
993 f->fmt.pix.height = 32;
994 if (f->fmt.pix.height > maxh)
995 f->fmt.pix.height = maxh;
996 if (f->fmt.pix.width < 48)
997 f->fmt.pix.width = 48;
998 if (f->fmt.pix.width > maxw)
999 f->fmt.pix.width = maxw;
1000 f->fmt.pix.width &= ~0x03;
1001 f->fmt.pix.bytesperline =
1002 (f->fmt.pix.width * fmt->depth) >> 3;
1003 f->fmt.pix.sizeimage =
1004 f->fmt.pix.height * f->fmt.pix.bytesperline;
1005
1006 return 0;
1007 }
1008
1009 /*FIXME: This seems to be generic enough to be at videodev2 */
1010 static int vidioc_s_fmt_cap (struct file *file, void *priv,
1011 struct v4l2_format *f)
1012 {
1013 struct vivi_fh *fh=priv;
1014 int ret = vidioc_try_fmt_cap(file,fh,f);
1015 if (ret < 0)
1016 return (ret);
1017
1018 fh->fmt = &format;
1019 fh->width = f->fmt.pix.width;
1020 fh->height = f->fmt.pix.height;
1021 fh->vb_vidq.field = f->fmt.pix.field;
1022 fh->type = f->type;
1023
1024 return (0);
1025 }
1026
1027 static int vidioc_reqbufs (struct file *file, void *priv, struct v4l2_requestbuffers *p)
1028 {
1029 struct vivi_fh *fh=priv;
1030
1031 return (videobuf_reqbufs(&fh->vb_vidq, p));
1032 }
1033
1034 static int vidioc_querybuf (struct file *file, void *priv, struct v4l2_buffer *p)
1035 {
1036 struct vivi_fh *fh=priv;
1037
1038 return (videobuf_querybuf(&fh->vb_vidq, p));
1039 }
1040
1041 static int vidioc_qbuf (struct file *file, void *priv, struct v4l2_buffer *p)
1042 {
1043 struct vivi_fh *fh=priv;
1044
1045 return (videobuf_qbuf(&fh->vb_vidq, p));
1046 }
1047
1048 static int vidioc_dqbuf (struct file *file, void *priv, struct v4l2_buffer *p)
1049 {
1050 struct vivi_fh *fh=priv;
1051
1052 return (videobuf_dqbuf(&fh->vb_vidq, p,
1053 file->f_flags & O_NONBLOCK));
1054 }
1055
1056 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1057 static int vidiocgmbuf (struct file *file, void *priv, struct video_mbuf *mbuf)
1058 {
1059 struct vivi_fh *fh=priv;
1060 struct videobuf_queue *q=&fh->vb_vidq;
1061 struct v4l2_requestbuffers req;
1062 unsigned int i;
1063 int ret;
1064
1065 req.type = q->type;
1066 req.count = 8;
1067 req.memory = V4L2_MEMORY_MMAP;
1068 ret = videobuf_reqbufs(q,&req);
1069 if (ret < 0)
1070 return (ret);
1071
1072 mbuf->frames = req.count;
1073 mbuf->size = 0;
1074 for (i = 0; i < mbuf->frames; i++) {
1075 mbuf->offsets[i] = q->bufs[i]->boff;
1076 mbuf->size += q->bufs[i]->bsize;
1077 }
1078 return (0);
1079 }
1080 #endif
1081
1082 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
1083 {
1084 struct vivi_fh *fh=priv;
1085 struct vivi_dev *dev = fh->dev;
1086
1087 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1088 return -EINVAL;
1089 if (i != fh->type)
1090 return -EINVAL;
1091
1092 if (!res_get(dev,fh))
1093 return -EBUSY;
1094 return (videobuf_streamon(&fh->vb_vidq));
1095 }
1096
1097 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
1098 {
1099 struct vivi_fh *fh=priv;
1100 struct vivi_dev *dev = fh->dev;
1101
1102 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1103 return -EINVAL;
1104 if (i != fh->type)
1105 return -EINVAL;
1106
1107 videobuf_streamoff(&fh->vb_vidq);
1108 res_free(dev,fh);
1109
1110 return (0);
1111 }
1112
1113 static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id *i)
1114 {
1115 return 0;
1116 }
1117
1118 /* only one input in this sample driver */
1119 static int vidioc_enum_input (struct file *file, void *priv,
1120 struct v4l2_input *inp)
1121 {
1122 if (inp->index != 0)
1123 return -EINVAL;
1124
1125 inp->type = V4L2_INPUT_TYPE_CAMERA;
1126 inp->std = V4L2_STD_NTSC_M;
1127 strcpy(inp->name,"Camera");
1128
1129 return (0);
1130 }
1131
1132 static int vidioc_g_input (struct file *file, void *priv, unsigned int *i)
1133 {
1134 *i = 0;
1135
1136 return (0);
1137 }
1138 static int vidioc_s_input (struct file *file, void *priv, unsigned int i)
1139 {
1140 if (i > 0)
1141 return -EINVAL;
1142
1143 return (0);
1144 }
1145
1146 /* --- controls ---------------------------------------------- */
1147 static int vidioc_queryctrl (struct file *file, void *priv,
1148 struct v4l2_queryctrl *qc)
1149 {
1150 int i;
1151
1152 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1153 if (qc->id && qc->id == vivi_qctrl[i].id) {
1154 memcpy(qc, &(vivi_qctrl[i]),
1155 sizeof(*qc));
1156 return (0);
1157 }
1158
1159 return -EINVAL;
1160 }
1161
1162 static int vidioc_g_ctrl (struct file *file, void *priv,
1163 struct v4l2_control *ctrl)
1164 {
1165 int i;
1166
1167 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1168 if (ctrl->id == vivi_qctrl[i].id) {
1169 ctrl->value=qctl_regs[i];
1170 return (0);
1171 }
1172
1173 return -EINVAL;
1174 }
1175 static int vidioc_s_ctrl (struct file *file, void *priv,
1176 struct v4l2_control *ctrl)
1177 {
1178 int i;
1179
1180 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1181 if (ctrl->id == vivi_qctrl[i].id) {
1182 if (ctrl->value <
1183 vivi_qctrl[i].minimum
1184 || ctrl->value >
1185 vivi_qctrl[i].maximum) {
1186 return (-ERANGE);
1187 }
1188 qctl_regs[i]=ctrl->value;
1189 return (0);
1190 }
1191 return -EINVAL;
1192 }
1193
1194 /* ------------------------------------------------------------------
1195 File operations for the device
1196 ------------------------------------------------------------------*/
1197
1198 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1199
1200 static int vivi_open(struct inode *inode, struct file *file)
1201 {
1202 int minor = iminor(inode);
1203 struct vivi_dev *h,*dev = NULL;
1204 struct vivi_fh *fh;
1205 struct list_head *list;
1206 enum v4l2_buf_type type = 0;
1207 int i;
1208
1209 printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
1210
1211 list_for_each(list,&vivi_devlist) {
1212 h = list_entry(list, struct vivi_dev, vivi_devlist);
1213 if (h->vfd.minor == minor) {
1214 dev = h;
1215 type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1216 }
1217 }
1218 if (NULL == dev)
1219 return -ENODEV;
1220
1221
1222
1223 /* If more than one user, mutex should be added */
1224 dev->users++;
1225
1226 dprintk(1,"open minor=%d type=%s users=%d\n",
1227 minor,v4l2_type_names[type],dev->users);
1228
1229 /* allocate + initialize per filehandle data */
1230 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
1231 if (NULL == fh) {
1232 dev->users--;
1233 return -ENOMEM;
1234 }
1235
1236 file->private_data = fh;
1237 fh->dev = dev;
1238
1239 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1240 fh->fmt = &format;
1241 fh->width = 640;
1242 fh->height = 480;
1243
1244 /* Put all controls at a sane state */
1245 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1246 qctl_regs[i] =vivi_qctrl[i].default_value;
1247
1248 dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1249 (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
1250 dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued));
1251 dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active));
1252
1253 /* Resets frame counters */
1254 dev->h=0;
1255 dev->m=0;
1256 dev->s=0;
1257 dev->us=0;
1258 dev->jiffies=jiffies;
1259 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
1260 dev->h,dev->m,dev->s,(dev->us+500)/1000);
1261
1262 #ifdef CONFIG_VIVI_SCATTER
1263 videobuf_queue_init(&fh->vb_vidq,VIDEOBUF_DMA_SCATTER, &vivi_video_qops,
1264 NULL, NULL,
1265 fh->type,
1266 V4L2_FIELD_INTERLACED,
1267 sizeof(struct vivi_buffer),fh);
1268 #else
1269 videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops,
1270 NULL, NULL,
1271 fh->type,
1272 V4L2_FIELD_INTERLACED,
1273 sizeof(struct vivi_buffer),fh);
1274 #endif
1275
1276 return 0;
1277 }
1278
1279 static ssize_t
1280 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1281 {
1282 struct vivi_fh *fh = file->private_data;
1283
1284 if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1285 if (res_locked(fh->dev))
1286 return -EBUSY;
1287 return videobuf_read_one(&fh->vb_vidq, data, count, ppos,
1288 file->f_flags & O_NONBLOCK);
1289 }
1290 return 0;
1291 }
1292
1293 static unsigned int
1294 vivi_poll(struct file *file, struct poll_table_struct *wait)
1295 {
1296 struct vivi_fh *fh = file->private_data;
1297 struct vivi_buffer *buf;
1298
1299 dprintk(1,"%s\n",__FUNCTION__);
1300
1301 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1302 return POLLERR;
1303
1304 if (res_get(fh->dev,fh)) {
1305 dprintk(1,"poll: mmap interface\n");
1306 /* streaming capture */
1307 if (list_empty(&fh->vb_vidq.stream))
1308 return POLLERR;
1309 buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream);
1310 } else {
1311 dprintk(1,"poll: read() interface\n");
1312 /* read() capture */
1313 buf = (struct vivi_buffer*)fh->vb_vidq.read_buf;
1314 if (NULL == buf)
1315 return POLLERR;
1316 }
1317 poll_wait(file, &buf->vb.done, wait);
1318 if (buf->vb.state == STATE_DONE ||
1319 buf->vb.state == STATE_ERROR)
1320 return POLLIN|POLLRDNORM;
1321 return 0;
1322 }
1323
1324 static int vivi_release(struct inode *inode, struct file *file)
1325 {
1326 struct vivi_fh *fh = file->private_data;
1327 struct vivi_dev *dev = fh->dev;
1328 struct vivi_dmaqueue *vidq = &dev->vidq;
1329
1330 int minor = iminor(inode);
1331
1332 vivi_stop_thread(vidq);
1333 videobuf_mmap_free(&fh->vb_vidq);
1334
1335 kfree (fh);
1336
1337 dev->users--;
1338
1339 printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users);
1340
1341 return 0;
1342 }
1343
1344 static int
1345 vivi_mmap(struct file *file, struct vm_area_struct * vma)
1346 {
1347 struct vivi_fh *fh = file->private_data;
1348 int ret;
1349
1350 dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma);
1351
1352 ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
1353
1354 dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1355 (unsigned long)vma->vm_start,
1356 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1357 ret);
1358
1359 return ret;
1360 }
1361
1362 static const struct file_operations vivi_fops = {
1363 .owner = THIS_MODULE,
1364 .open = vivi_open,
1365 .release = vivi_release,
1366 .read = vivi_read,
1367 .poll = vivi_poll,
1368 .ioctl = video_ioctl2, /* V4L2 ioctl handler */
1369 .mmap = vivi_mmap,
1370 .llseek = no_llseek,
1371 };
1372
1373 static struct video_device vivi = {
1374 .name = "vivi",
1375 .type = VID_TYPE_CAPTURE,
1376 .hardware = 0,
1377 .fops = &vivi_fops,
1378 .minor = -1,
1379 // .release = video_device_release,
1380
1381 .vidioc_querycap = vidioc_querycap,
1382 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1383 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1384 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1385 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1386 .vidioc_reqbufs = vidioc_reqbufs,
1387 .vidioc_querybuf = vidioc_querybuf,
1388 .vidioc_qbuf = vidioc_qbuf,
1389 .vidioc_dqbuf = vidioc_dqbuf,
1390 .vidioc_s_std = vidioc_s_std,
1391 .vidioc_enum_input = vidioc_enum_input,
1392 .vidioc_g_input = vidioc_g_input,
1393 .vidioc_s_input = vidioc_s_input,
1394 .vidioc_queryctrl = vidioc_queryctrl,
1395 .vidioc_g_ctrl = vidioc_g_ctrl,
1396 .vidioc_s_ctrl = vidioc_s_ctrl,
1397 .vidioc_streamon = vidioc_streamon,
1398 .vidioc_streamoff = vidioc_streamoff,
1399 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1400 .vidiocgmbuf = vidiocgmbuf,
1401 #endif
1402 .tvnorms = V4L2_STD_NTSC_M,
1403 .current_norm = V4L2_STD_NTSC_M,
1404 };
1405 /* -----------------------------------------------------------------
1406 Initialization and module stuff
1407 ------------------------------------------------------------------*/
1408
1409 static int __init vivi_init(void)
1410 {
1411 int ret;
1412 struct vivi_dev *dev;
1413
1414 dev = kzalloc(sizeof(*dev),GFP_KERNEL);
1415 if (NULL == dev)
1416 return -ENOMEM;
1417 list_add_tail(&dev->vivi_devlist,&vivi_devlist);
1418
1419 /* init video dma queues */
1420 INIT_LIST_HEAD(&dev->vidq.active);
1421 INIT_LIST_HEAD(&dev->vidq.queued);
1422 init_waitqueue_head(&dev->vidq.wq);
1423
1424 /* initialize locks */
1425 init_MUTEX(&dev->lock);
1426
1427 dev->vidq.timeout.function = vivi_vid_timeout;
1428 dev->vidq.timeout.data = (unsigned long)dev;
1429 init_timer(&dev->vidq.timeout);
1430
1431 ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
1432 printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
1433 return ret;
1434 }
1435
1436 static void __exit vivi_exit(void)
1437 {
1438 struct vivi_dev *h;
1439 struct list_head *list;
1440
1441 while (!list_empty(&vivi_devlist)) {
1442 list = vivi_devlist.next;
1443 list_del(list);
1444 h = list_entry(list, struct vivi_dev, vivi_devlist);
1445 kfree (h);
1446 }
1447 video_unregister_device(&vivi);
1448 }
1449
1450 module_init(vivi_init);
1451 module_exit(vivi_exit);
1452
1453 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1454 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1455 MODULE_LICENSE("Dual BSD/GPL");
1456
1457 module_param(video_nr, int, 0);
1458
1459 module_param_named(debug,vivi.debug, int, 0644);
1460 MODULE_PARM_DESC(debug,"activates debug info");
1461
1462 module_param(vid_limit,int,0644);
1463 MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
1464
Linux kernel - Deliverables
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