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Freezer: make kernel threads nonfreezable by default
[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 set_freezable();
577
578 for (;;) {
579 vivi_sleep(dma_q);
580
581 if (kthread_should_stop())
582 break;
583 }
584 dprintk(1, "thread: exit\n");
585 return 0;
586 }
587
588 static int vivi_start_thread(struct vivi_dmaqueue *dma_q)
589 {
590 dma_q->frame=0;
591 dma_q->ini_jiffies=jiffies;
592
593 dprintk(1,"%s\n",__FUNCTION__);
594
595 dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
596
597 if (IS_ERR(dma_q->kthread)) {
598 printk(KERN_ERR "vivi: kernel_thread() failed\n");
599 return PTR_ERR(dma_q->kthread);
600 }
601 /* Wakes thread */
602 wake_up_interruptible(&dma_q->wq);
603
604 dprintk(1,"returning from %s\n",__FUNCTION__);
605 return 0;
606 }
607
608 static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
609 {
610 dprintk(1,"%s\n",__FUNCTION__);
611 /* shutdown control thread */
612 if (dma_q->kthread) {
613 kthread_stop(dma_q->kthread);
614 dma_q->kthread=NULL;
615 }
616 }
617
618 static int restart_video_queue(struct vivi_dmaqueue *dma_q)
619 {
620 struct vivi_buffer *buf, *prev;
621 struct list_head *item;
622
623 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
624
625 if (!list_empty(&dma_q->active)) {
626 buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
627 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
628 buf, buf->vb.i);
629
630 dprintk(1,"Restarting video dma\n");
631 vivi_stop_thread(dma_q);
632 // vivi_start_thread(dma_q);
633
634 /* cancel all outstanding capture / vbi requests */
635 list_for_each(item,&dma_q->active) {
636 buf = list_entry(item, struct vivi_buffer, vb.queue);
637
638 list_del(&buf->vb.queue);
639 buf->vb.state = STATE_ERROR;
640 wake_up(&buf->vb.done);
641 }
642 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
643
644 return 0;
645 }
646
647 prev = NULL;
648 for (;;) {
649 if (list_empty(&dma_q->queued))
650 return 0;
651 buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
652 if (NULL == prev) {
653 list_del(&buf->vb.queue);
654 list_add_tail(&buf->vb.queue,&dma_q->active);
655
656 dprintk(1,"Restarting video dma\n");
657 vivi_stop_thread(dma_q);
658 vivi_start_thread(dma_q);
659
660 buf->vb.state = STATE_ACTIVE;
661 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
662 dprintk(2,"[%p/%d] restart_queue - first active\n",
663 buf,buf->vb.i);
664
665 } else if (prev->vb.width == buf->vb.width &&
666 prev->vb.height == buf->vb.height &&
667 prev->fmt == buf->fmt) {
668 list_del(&buf->vb.queue);
669 list_add_tail(&buf->vb.queue,&dma_q->active);
670 buf->vb.state = STATE_ACTIVE;
671 dprintk(2,"[%p/%d] restart_queue - move to active\n",
672 buf,buf->vb.i);
673 } else {
674 return 0;
675 }
676 prev = buf;
677 }
678 }
679
680 static void vivi_vid_timeout(unsigned long data)
681 {
682 struct vivi_dev *dev = (struct vivi_dev*)data;
683 struct vivi_dmaqueue *vidq = &dev->vidq;
684 struct vivi_buffer *buf;
685
686 while (!list_empty(&vidq->active)) {
687 buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
688 list_del(&buf->vb.queue);
689 buf->vb.state = STATE_ERROR;
690 wake_up(&buf->vb.done);
691 printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
692 }
693
694 restart_video_queue(vidq);
695 }
696
697 /* ------------------------------------------------------------------
698 Videobuf operations
699 ------------------------------------------------------------------*/
700 static int
701 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
702 {
703 struct vivi_fh *fh = vq->priv_data;
704
705 *size = fh->width*fh->height*2;
706
707 if (0 == *count)
708 *count = 32;
709 while (*size * *count > vid_limit * 1024 * 1024)
710 (*count)--;
711 return 0;
712 }
713
714 static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
715 {
716 dprintk(1,"%s\n",__FUNCTION__);
717
718 if (in_interrupt())
719 BUG();
720
721 #ifdef CONFIG_VIVI_SCATTER
722 /*FIXME: Maybe a spinlock is required here */
723 kfree(buf->to_addr);
724 buf->to_addr=NULL;
725 #endif
726
727 videobuf_waiton(&buf->vb,0,0);
728 videobuf_dma_unmap(vq, &buf->vb.dma);
729 videobuf_dma_free(&buf->vb.dma);
730 buf->vb.state = STATE_NEEDS_INIT;
731 }
732
733 #define norm_maxw() 1024
734 #define norm_maxh() 768
735 static int
736 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
737 enum v4l2_field field)
738 {
739 struct vivi_fh *fh = vq->priv_data;
740 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
741 int rc, init_buffer = 0;
742
743 // dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
744
745 BUG_ON(NULL == fh->fmt);
746 if (fh->width < 48 || fh->width > norm_maxw() ||
747 fh->height < 32 || fh->height > norm_maxh())
748 return -EINVAL;
749 buf->vb.size = fh->width*fh->height*2;
750 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
751 return -EINVAL;
752
753 if (buf->fmt != fh->fmt ||
754 buf->vb.width != fh->width ||
755 buf->vb.height != fh->height ||
756 buf->vb.field != field) {
757 buf->fmt = fh->fmt;
758 buf->vb.width = fh->width;
759 buf->vb.height = fh->height;
760 buf->vb.field = field;
761 init_buffer = 1;
762 }
763
764 if (STATE_NEEDS_INIT == buf->vb.state) {
765 if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
766 goto fail;
767 }
768
769 buf->vb.state = STATE_PREPARED;
770
771 #ifdef CONFIG_VIVI_SCATTER
772 if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) {
773 rc=-ENOMEM;
774 goto fail;
775 }
776 #endif
777 return 0;
778
779 fail:
780 free_buffer(vq,buf);
781 return rc;
782 }
783
784 static void
785 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
786 {
787 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
788 struct vivi_fh *fh = vq->priv_data;
789 struct vivi_dev *dev = fh->dev;
790 struct vivi_dmaqueue *vidq = &dev->vidq;
791 struct vivi_buffer *prev;
792
793 if (!list_empty(&vidq->queued)) {
794 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
795 list_add_tail(&buf->vb.queue,&vidq->queued);
796 buf->vb.state = STATE_QUEUED;
797 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
798 buf, buf->vb.i);
799 } else if (list_empty(&vidq->active)) {
800 list_add_tail(&buf->vb.queue,&vidq->active);
801
802 buf->vb.state = STATE_ACTIVE;
803 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
804 dprintk(2,"[%p/%d] buffer_queue - first active\n",
805 buf, buf->vb.i);
806
807 vivi_start_thread(vidq);
808 } else {
809 prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
810 if (prev->vb.width == buf->vb.width &&
811 prev->vb.height == buf->vb.height &&
812 prev->fmt == buf->fmt) {
813 list_add_tail(&buf->vb.queue,&vidq->active);
814 buf->vb.state = STATE_ACTIVE;
815 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
816 buf, buf->vb.i);
817
818 } else {
819 list_add_tail(&buf->vb.queue,&vidq->queued);
820 buf->vb.state = STATE_QUEUED;
821 dprintk(2,"[%p/%d] buffer_queue - first queued\n",
822 buf, buf->vb.i);
823 }
824 }
825 }
826
827 static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
828 {
829 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
830 struct vivi_fh *fh = vq->priv_data;
831 struct vivi_dev *dev = (struct vivi_dev*)fh->dev;
832 struct vivi_dmaqueue *vidq = &dev->vidq;
833
834 dprintk(1,"%s\n",__FUNCTION__);
835
836 vivi_stop_thread(vidq);
837
838 free_buffer(vq,buf);
839 }
840
841 #ifdef CONFIG_VIVI_SCATTER
842 static int vivi_map_sg(void *dev, struct scatterlist *sg, int nents,
843 int direction)
844 {
845 int i;
846
847 dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents);
848 BUG_ON(direction == DMA_NONE);
849
850 for (i = 0; i < nents; i++ ) {
851 BUG_ON(!sg[i].page);
852
853 sg_dma_address(&sg[i]) = page_to_phys(sg[i].page) + sg[i].offset;
854 }
855
856 return nents;
857 }
858
859 static int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages,
860 int direction)
861 {
862 dprintk(1,"%s\n",__FUNCTION__);
863 return 0;
864 }
865
866 static int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist, int nr_pages,
867 int direction)
868 {
869 // dprintk(1,"%s\n",__FUNCTION__);
870
871 // flush_write_buffers();
872 return 0;
873 }
874 #endif
875
876 static struct videobuf_queue_ops vivi_video_qops = {
877 .buf_setup = buffer_setup,
878 .buf_prepare = buffer_prepare,
879 .buf_queue = buffer_queue,
880 .buf_release = buffer_release,
881
882 /* Non-pci handling routines */
883 // .vb_map_sg = vivi_map_sg,
884 // .vb_dma_sync_sg = vivi_dma_sync_sg,
885 // .vb_unmap_sg = vivi_unmap_sg,
886 };
887
888 /* ------------------------------------------------------------------
889 IOCTL handling
890 ------------------------------------------------------------------*/
891
892
893 static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
894 {
895 /* is it free? */
896 down(&dev->lock);
897 if (dev->resources) {
898 /* no, someone else uses it */
899 up(&dev->lock);
900 return 0;
901 }
902 /* it's free, grab it */
903 dev->resources =1;
904 dprintk(1,"res: get\n");
905 up(&dev->lock);
906 return 1;
907 }
908
909 static int res_locked(struct vivi_dev *dev)
910 {
911 return (dev->resources);
912 }
913
914 static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
915 {
916 down(&dev->lock);
917 dev->resources = 0;
918 dprintk(1,"res: put\n");
919 up(&dev->lock);
920 }
921
922 /* ------------------------------------------------------------------
923 IOCTL vidioc handling
924 ------------------------------------------------------------------*/
925 static int vidioc_querycap (struct file *file, void *priv,
926 struct v4l2_capability *cap)
927 {
928 strcpy(cap->driver, "vivi");
929 strcpy(cap->card, "vivi");
930 cap->version = VIVI_VERSION;
931 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
932 V4L2_CAP_STREAMING |
933 V4L2_CAP_READWRITE;
934 return 0;
935 }
936
937 static int vidioc_enum_fmt_cap (struct file *file, void *priv,
938 struct v4l2_fmtdesc *f)
939 {
940 if (f->index > 0)
941 return -EINVAL;
942
943 strlcpy(f->description,format.name,sizeof(f->description));
944 f->pixelformat = format.fourcc;
945 return 0;
946 }
947
948 static int vidioc_g_fmt_cap (struct file *file, void *priv,
949 struct v4l2_format *f)
950 {
951 struct vivi_fh *fh=priv;
952
953 f->fmt.pix.width = fh->width;
954 f->fmt.pix.height = fh->height;
955 f->fmt.pix.field = fh->vb_vidq.field;
956 f->fmt.pix.pixelformat = fh->fmt->fourcc;
957 f->fmt.pix.bytesperline =
958 (f->fmt.pix.width * fh->fmt->depth) >> 3;
959 f->fmt.pix.sizeimage =
960 f->fmt.pix.height * f->fmt.pix.bytesperline;
961
962 return (0);
963 }
964
965 static int vidioc_try_fmt_cap (struct file *file, void *priv,
966 struct v4l2_format *f)
967 {
968 struct vivi_fmt *fmt;
969 enum v4l2_field field;
970 unsigned int maxw, maxh;
971
972 if (format.fourcc != f->fmt.pix.pixelformat) {
973 dprintk(1,"Fourcc format (0x%08x) invalid. Driver accepts "
974 "only 0x%08x\n",f->fmt.pix.pixelformat,format.fourcc);
975 return -EINVAL;
976 }
977 fmt=&format;
978
979 field = f->fmt.pix.field;
980
981 if (field == V4L2_FIELD_ANY) {
982 // field=V4L2_FIELD_INTERLACED;
983 field=V4L2_FIELD_SEQ_TB;
984 } else if (V4L2_FIELD_INTERLACED != field) {
985 dprintk(1,"Field type invalid.\n");
986 return -EINVAL;
987 }
988
989 maxw = norm_maxw();
990 maxh = norm_maxh();
991
992 f->fmt.pix.field = field;
993 if (f->fmt.pix.height < 32)
994 f->fmt.pix.height = 32;
995 if (f->fmt.pix.height > maxh)
996 f->fmt.pix.height = maxh;
997 if (f->fmt.pix.width < 48)
998 f->fmt.pix.width = 48;
999 if (f->fmt.pix.width > maxw)
1000 f->fmt.pix.width = maxw;
1001 f->fmt.pix.width &= ~0x03;
1002 f->fmt.pix.bytesperline =
1003 (f->fmt.pix.width * fmt->depth) >> 3;
1004 f->fmt.pix.sizeimage =
1005 f->fmt.pix.height * f->fmt.pix.bytesperline;
1006
1007 return 0;
1008 }
1009
1010 /*FIXME: This seems to be generic enough to be at videodev2 */
1011 static int vidioc_s_fmt_cap (struct file *file, void *priv,
1012 struct v4l2_format *f)
1013 {
1014 struct vivi_fh *fh=priv;
1015 int ret = vidioc_try_fmt_cap(file,fh,f);
1016 if (ret < 0)
1017 return (ret);
1018
1019 fh->fmt = &format;
1020 fh->width = f->fmt.pix.width;
1021 fh->height = f->fmt.pix.height;
1022 fh->vb_vidq.field = f->fmt.pix.field;
1023 fh->type = f->type;
1024
1025 return (0);
1026 }
1027
1028 static int vidioc_reqbufs (struct file *file, void *priv, struct v4l2_requestbuffers *p)
1029 {
1030 struct vivi_fh *fh=priv;
1031
1032 return (videobuf_reqbufs(&fh->vb_vidq, p));
1033 }
1034
1035 static int vidioc_querybuf (struct file *file, void *priv, struct v4l2_buffer *p)
1036 {
1037 struct vivi_fh *fh=priv;
1038
1039 return (videobuf_querybuf(&fh->vb_vidq, p));
1040 }
1041
1042 static int vidioc_qbuf (struct file *file, void *priv, struct v4l2_buffer *p)
1043 {
1044 struct vivi_fh *fh=priv;
1045
1046 return (videobuf_qbuf(&fh->vb_vidq, p));
1047 }
1048
1049 static int vidioc_dqbuf (struct file *file, void *priv, struct v4l2_buffer *p)
1050 {
1051 struct vivi_fh *fh=priv;
1052
1053 return (videobuf_dqbuf(&fh->vb_vidq, p,
1054 file->f_flags & O_NONBLOCK));
1055 }
1056
1057 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1058 static int vidiocgmbuf (struct file *file, void *priv, struct video_mbuf *mbuf)
1059 {
1060 struct vivi_fh *fh=priv;
1061 struct videobuf_queue *q=&fh->vb_vidq;
1062 struct v4l2_requestbuffers req;
1063 unsigned int i;
1064 int ret;
1065
1066 req.type = q->type;
1067 req.count = 8;
1068 req.memory = V4L2_MEMORY_MMAP;
1069 ret = videobuf_reqbufs(q,&req);
1070 if (ret < 0)
1071 return (ret);
1072
1073 mbuf->frames = req.count;
1074 mbuf->size = 0;
1075 for (i = 0; i < mbuf->frames; i++) {
1076 mbuf->offsets[i] = q->bufs[i]->boff;
1077 mbuf->size += q->bufs[i]->bsize;
1078 }
1079 return (0);
1080 }
1081 #endif
1082
1083 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
1084 {
1085 struct vivi_fh *fh=priv;
1086 struct vivi_dev *dev = fh->dev;
1087
1088 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1089 return -EINVAL;
1090 if (i != fh->type)
1091 return -EINVAL;
1092
1093 if (!res_get(dev,fh))
1094 return -EBUSY;
1095 return (videobuf_streamon(&fh->vb_vidq));
1096 }
1097
1098 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
1099 {
1100 struct vivi_fh *fh=priv;
1101 struct vivi_dev *dev = fh->dev;
1102
1103 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1104 return -EINVAL;
1105 if (i != fh->type)
1106 return -EINVAL;
1107
1108 videobuf_streamoff(&fh->vb_vidq);
1109 res_free(dev,fh);
1110
1111 return (0);
1112 }
1113
1114 static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id *i)
1115 {
1116 return 0;
1117 }
1118
1119 /* only one input in this sample driver */
1120 static int vidioc_enum_input (struct file *file, void *priv,
1121 struct v4l2_input *inp)
1122 {
1123 if (inp->index != 0)
1124 return -EINVAL;
1125
1126 inp->type = V4L2_INPUT_TYPE_CAMERA;
1127 inp->std = V4L2_STD_NTSC_M;
1128 strcpy(inp->name,"Camera");
1129
1130 return (0);
1131 }
1132
1133 static int vidioc_g_input (struct file *file, void *priv, unsigned int *i)
1134 {
1135 *i = 0;
1136
1137 return (0);
1138 }
1139 static int vidioc_s_input (struct file *file, void *priv, unsigned int i)
1140 {
1141 if (i > 0)
1142 return -EINVAL;
1143
1144 return (0);
1145 }
1146
1147 /* --- controls ---------------------------------------------- */
1148 static int vidioc_queryctrl (struct file *file, void *priv,
1149 struct v4l2_queryctrl *qc)
1150 {
1151 int i;
1152
1153 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1154 if (qc->id && qc->id == vivi_qctrl[i].id) {
1155 memcpy(qc, &(vivi_qctrl[i]),
1156 sizeof(*qc));
1157 return (0);
1158 }
1159
1160 return -EINVAL;
1161 }
1162
1163 static int vidioc_g_ctrl (struct file *file, void *priv,
1164 struct v4l2_control *ctrl)
1165 {
1166 int i;
1167
1168 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1169 if (ctrl->id == vivi_qctrl[i].id) {
1170 ctrl->value=qctl_regs[i];
1171 return (0);
1172 }
1173
1174 return -EINVAL;
1175 }
1176 static int vidioc_s_ctrl (struct file *file, void *priv,
1177 struct v4l2_control *ctrl)
1178 {
1179 int i;
1180
1181 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1182 if (ctrl->id == vivi_qctrl[i].id) {
1183 if (ctrl->value <
1184 vivi_qctrl[i].minimum
1185 || ctrl->value >
1186 vivi_qctrl[i].maximum) {
1187 return (-ERANGE);
1188 }
1189 qctl_regs[i]=ctrl->value;
1190 return (0);
1191 }
1192 return -EINVAL;
1193 }
1194
1195 /* ------------------------------------------------------------------
1196 File operations for the device
1197 ------------------------------------------------------------------*/
1198
1199 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1200
1201 static int vivi_open(struct inode *inode, struct file *file)
1202 {
1203 int minor = iminor(inode);
1204 struct vivi_dev *h,*dev = NULL;
1205 struct vivi_fh *fh;
1206 struct list_head *list;
1207 enum v4l2_buf_type type = 0;
1208 int i;
1209
1210 printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
1211
1212 list_for_each(list,&vivi_devlist) {
1213 h = list_entry(list, struct vivi_dev, vivi_devlist);
1214 if (h->vfd.minor == minor) {
1215 dev = h;
1216 type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1217 }
1218 }
1219 if (NULL == dev)
1220 return -ENODEV;
1221
1222
1223
1224 /* If more than one user, mutex should be added */
1225 dev->users++;
1226
1227 dprintk(1,"open minor=%d type=%s users=%d\n",
1228 minor,v4l2_type_names[type],dev->users);
1229
1230 /* allocate + initialize per filehandle data */
1231 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
1232 if (NULL == fh) {
1233 dev->users--;
1234 return -ENOMEM;
1235 }
1236
1237 file->private_data = fh;
1238 fh->dev = dev;
1239
1240 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1241 fh->fmt = &format;
1242 fh->width = 640;
1243 fh->height = 480;
1244
1245 /* Put all controls at a sane state */
1246 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1247 qctl_regs[i] =vivi_qctrl[i].default_value;
1248
1249 dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1250 (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
1251 dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued));
1252 dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active));
1253
1254 /* Resets frame counters */
1255 dev->h=0;
1256 dev->m=0;
1257 dev->s=0;
1258 dev->us=0;
1259 dev->jiffies=jiffies;
1260 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
1261 dev->h,dev->m,dev->s,(dev->us+500)/1000);
1262
1263 #ifdef CONFIG_VIVI_SCATTER
1264 videobuf_queue_init(&fh->vb_vidq,VIDEOBUF_DMA_SCATTER, &vivi_video_qops,
1265 NULL, NULL,
1266 fh->type,
1267 V4L2_FIELD_INTERLACED,
1268 sizeof(struct vivi_buffer),fh);
1269 #else
1270 videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops,
1271 NULL, NULL,
1272 fh->type,
1273 V4L2_FIELD_INTERLACED,
1274 sizeof(struct vivi_buffer),fh);
1275 #endif
1276
1277 return 0;
1278 }
1279
1280 static ssize_t
1281 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1282 {
1283 struct vivi_fh *fh = file->private_data;
1284
1285 if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1286 if (res_locked(fh->dev))
1287 return -EBUSY;
1288 return videobuf_read_one(&fh->vb_vidq, data, count, ppos,
1289 file->f_flags & O_NONBLOCK);
1290 }
1291 return 0;
1292 }
1293
1294 static unsigned int
1295 vivi_poll(struct file *file, struct poll_table_struct *wait)
1296 {
1297 struct vivi_fh *fh = file->private_data;
1298 struct vivi_buffer *buf;
1299
1300 dprintk(1,"%s\n",__FUNCTION__);
1301
1302 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1303 return POLLERR;
1304
1305 if (res_get(fh->dev,fh)) {
1306 dprintk(1,"poll: mmap interface\n");
1307 /* streaming capture */
1308 if (list_empty(&fh->vb_vidq.stream))
1309 return POLLERR;
1310 buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream);
1311 } else {
1312 dprintk(1,"poll: read() interface\n");
1313 /* read() capture */
1314 buf = (struct vivi_buffer*)fh->vb_vidq.read_buf;
1315 if (NULL == buf)
1316 return POLLERR;
1317 }
1318 poll_wait(file, &buf->vb.done, wait);
1319 if (buf->vb.state == STATE_DONE ||
1320 buf->vb.state == STATE_ERROR)
1321 return POLLIN|POLLRDNORM;
1322 return 0;
1323 }
1324
1325 static int vivi_release(struct inode *inode, struct file *file)
1326 {
1327 struct vivi_fh *fh = file->private_data;
1328 struct vivi_dev *dev = fh->dev;
1329 struct vivi_dmaqueue *vidq = &dev->vidq;
1330
1331 int minor = iminor(inode);
1332
1333 vivi_stop_thread(vidq);
1334 videobuf_mmap_free(&fh->vb_vidq);
1335
1336 kfree (fh);
1337
1338 dev->users--;
1339
1340 printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users);
1341
1342 return 0;
1343 }
1344
1345 static int
1346 vivi_mmap(struct file *file, struct vm_area_struct * vma)
1347 {
1348 struct vivi_fh *fh = file->private_data;
1349 int ret;
1350
1351 dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma);
1352
1353 ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
1354
1355 dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1356 (unsigned long)vma->vm_start,
1357 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1358 ret);
1359
1360 return ret;
1361 }
1362
1363 static const struct file_operations vivi_fops = {
1364 .owner = THIS_MODULE,
1365 .open = vivi_open,
1366 .release = vivi_release,
1367 .read = vivi_read,
1368 .poll = vivi_poll,
1369 .ioctl = video_ioctl2, /* V4L2 ioctl handler */
1370 .mmap = vivi_mmap,
1371 .llseek = no_llseek,
1372 };
1373
1374 static struct video_device vivi = {
1375 .name = "vivi",
1376 .type = VID_TYPE_CAPTURE,
1377 .hardware = 0,
1378 .fops = &vivi_fops,
1379 .minor = -1,
1380 // .release = video_device_release,
1381
1382 .vidioc_querycap = vidioc_querycap,
1383 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1384 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1385 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1386 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1387 .vidioc_reqbufs = vidioc_reqbufs,
1388 .vidioc_querybuf = vidioc_querybuf,
1389 .vidioc_qbuf = vidioc_qbuf,
1390 .vidioc_dqbuf = vidioc_dqbuf,
1391 .vidioc_s_std = vidioc_s_std,
1392 .vidioc_enum_input = vidioc_enum_input,
1393 .vidioc_g_input = vidioc_g_input,
1394 .vidioc_s_input = vidioc_s_input,
1395 .vidioc_queryctrl = vidioc_queryctrl,
1396 .vidioc_g_ctrl = vidioc_g_ctrl,
1397 .vidioc_s_ctrl = vidioc_s_ctrl,
1398 .vidioc_streamon = vidioc_streamon,
1399 .vidioc_streamoff = vidioc_streamoff,
1400 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1401 .vidiocgmbuf = vidiocgmbuf,
1402 #endif
1403 .tvnorms = V4L2_STD_NTSC_M,
1404 .current_norm = V4L2_STD_NTSC_M,
1405 };
1406 /* -----------------------------------------------------------------
1407 Initialization and module stuff
1408 ------------------------------------------------------------------*/
1409
1410 static int __init vivi_init(void)
1411 {
1412 int ret;
1413 struct vivi_dev *dev;
1414
1415 dev = kzalloc(sizeof(*dev),GFP_KERNEL);
1416 if (NULL == dev)
1417 return -ENOMEM;
1418 list_add_tail(&dev->vivi_devlist,&vivi_devlist);
1419
1420 /* init video dma queues */
1421 INIT_LIST_HEAD(&dev->vidq.active);
1422 INIT_LIST_HEAD(&dev->vidq.queued);
1423 init_waitqueue_head(&dev->vidq.wq);
1424
1425 /* initialize locks */
1426 init_MUTEX(&dev->lock);
1427
1428 dev->vidq.timeout.function = vivi_vid_timeout;
1429 dev->vidq.timeout.data = (unsigned long)dev;
1430 init_timer(&dev->vidq.timeout);
1431
1432 ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
1433 printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
1434 return ret;
1435 }
1436
1437 static void __exit vivi_exit(void)
1438 {
1439 struct vivi_dev *h;
1440 struct list_head *list;
1441
1442 while (!list_empty(&vivi_devlist)) {
1443 list = vivi_devlist.next;
1444 list_del(list);
1445 h = list_entry(list, struct vivi_dev, vivi_devlist);
1446 kfree (h);
1447 }
1448 video_unregister_device(&vivi);
1449 }
1450
1451 module_init(vivi_init);
1452 module_exit(vivi_exit);
1453
1454 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1455 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1456 MODULE_LICENSE("Dual BSD/GPL");
1457
1458 module_param(video_nr, int, 0);
1459
1460 module_param_named(debug,vivi.debug, int, 0644);
1461 MODULE_PARM_DESC(debug,"activates debug info");
1462
1463 module_param(vid_limit,int,0644);
1464 MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
1465
Linux kernel - Deliverables
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