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V4L/DVB (6274): V4L: vivi.c replace logic in vivi_poll with videobuf_poll_stream
[linux-2.6/mini2440.git] / drivers / media / video / vivi.c
blobcdef622f6b3279cbd1197ccf8d6596a4d8de47dc
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/mutex.h>
29 #include <linux/videodev2.h>
30 #include <linux/dma-mapping.h>
31 #ifdef CONFIG_VIDEO_V4L1_COMPAT
32 /* Include V4L1 specific functions. Should be removed soon */
33 #include <linux/videodev.h>
34 #endif
35 #include <linux/interrupt.h>
36 #include <media/videobuf-vmalloc.h>
37 #include <media/v4l2-common.h>
38 #include <linux/kthread.h>
39 #include <linux/highmem.h>
40 #include <linux/freezer.h>
41
42 /* Wake up at about 30 fps */
43 #define WAKE_NUMERATOR 30
44 #define WAKE_DENOMINATOR 1001
45 #define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
46
47 /* These timers are for 1 fps - used only for testing */
48 //#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
49 //#define BUFFER_TIMEOUT msecs_to_jiffies(5000) /* 5 seconds */
50
51 #include "font.h"
52
53 #define VIVI_MAJOR_VERSION 0
54 #define VIVI_MINOR_VERSION 4
55 #define VIVI_RELEASE 0
56 #define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
57
58 /* Declare static vars that will be used as parameters */
59 static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
60 static struct video_device vivi; /* Video device */
61 static int video_nr = -1; /* /dev/videoN, -1 for autodetect */
62
63 /* supported controls */
64 static struct v4l2_queryctrl vivi_qctrl[] = {
65 {
66 .id = V4L2_CID_AUDIO_VOLUME,
67 .name = "Volume",
68 .minimum = 0,
69 .maximum = 65535,
70 .step = 65535/100,
71 .default_value = 65535,
72 .flags = 0,
73 .type = V4L2_CTRL_TYPE_INTEGER,
74 },{
75 .id = V4L2_CID_BRIGHTNESS,
76 .type = V4L2_CTRL_TYPE_INTEGER,
77 .name = "Brightness",
78 .minimum = 0,
79 .maximum = 255,
80 .step = 1,
81 .default_value = 127,
82 .flags = 0,
83 }, {
84 .id = V4L2_CID_CONTRAST,
85 .type = V4L2_CTRL_TYPE_INTEGER,
86 .name = "Contrast",
87 .minimum = 0,
88 .maximum = 255,
89 .step = 0x1,
90 .default_value = 0x10,
91 .flags = 0,
92 }, {
93 .id = V4L2_CID_SATURATION,
94 .type = V4L2_CTRL_TYPE_INTEGER,
95 .name = "Saturation",
96 .minimum = 0,
97 .maximum = 255,
98 .step = 0x1,
99 .default_value = 127,
100 .flags = 0,
101 }, {
102 .id = V4L2_CID_HUE,
103 .type = V4L2_CTRL_TYPE_INTEGER,
104 .name = "Hue",
105 .minimum = -128,
106 .maximum = 127,
107 .step = 0x1,
108 .default_value = 0,
109 .flags = 0,
110 }
111 };
112
113 static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
114
115 #define dprintk(level,fmt, arg...) \
116 do { \
117 if (vivi.debug >= (level)) \
118 printk(KERN_DEBUG "vivi: " fmt , ## arg); \
119 } while (0)
120
121 /* ------------------------------------------------------------------
122 Basic structures
123 ------------------------------------------------------------------*/
124
125 struct vivi_fmt {
126 char *name;
127 u32 fourcc; /* v4l2 format id */
128 int depth;
129 };
130
131 static struct vivi_fmt format = {
132 .name = "4:2:2, packed, YUYV",
133 .fourcc = V4L2_PIX_FMT_YUYV,
134 .depth = 16,
135 };
136
137 struct sg_to_addr {
138 int pos;
139 struct scatterlist *sg;
140 };
141
142 /* buffer for one video frame */
143 struct vivi_buffer {
144 /* common v4l buffer stuff -- must be first */
145 struct videobuf_buffer vb;
146
147 struct vivi_fmt *fmt;
148 };
149
150 struct vivi_dmaqueue {
151 struct list_head active;
152 struct list_head queued;
153 struct timer_list timeout;
154
155 /* thread for generating video stream*/
156 struct task_struct *kthread;
157 wait_queue_head_t wq;
158 /* Counters to control fps rate */
159 int frame;
160 int ini_jiffies;
161 };
162
163 static LIST_HEAD(vivi_devlist);
164
165 struct vivi_dev {
166 struct list_head vivi_devlist;
167
168 struct mutex lock;
169
170 int users;
171
172 /* various device info */
173 unsigned int resources;
174 struct video_device vfd;
175
176 struct vivi_dmaqueue vidq;
177
178 /* Several counters */
179 int h,m,s,us,jiffies;
180 char timestr[13];
181 };
182
183 struct vivi_fh {
184 struct vivi_dev *dev;
185
186 /* video capture */
187 struct vivi_fmt *fmt;
188 unsigned int width,height;
189 struct videobuf_queue vb_vidq;
190
191 enum v4l2_buf_type type;
192 };
193
194 /* ------------------------------------------------------------------
195 DMA and thread functions
196 ------------------------------------------------------------------*/
197
198 /* Bars and Colors should match positions */
199
200 enum colors {
201 WHITE,
202 AMBAR,
203 CYAN,
204 GREEN,
205 MAGENTA,
206 RED,
207 BLUE
208 };
209
210 static u8 bars[8][3] = {
211 /* R G B */
212 {204,204,204}, /* white */
213 {208,208, 0}, /* ambar */
214 { 0,206,206}, /* cyan */
215 { 0,239, 0}, /* green */
216 {239, 0,239}, /* magenta */
217 {205, 0, 0}, /* red */
218 { 0, 0,255}, /* blue */
219 { 0, 0, 0}
220 };
221
222 #define TO_Y(r,g,b) (((16829*r +33039*g +6416*b + 32768)>>16)+16)
223 /* RGB to V(Cr) Color transform */
224 #define TO_V(r,g,b) (((28784*r -24103*g -4681*b + 32768)>>16)+128)
225 /* RGB to U(Cb) Color transform */
226 #define TO_U(r,g,b) (((-9714*r -19070*g +28784*b + 32768)>>16)+128)
227
228 #define TSTAMP_MIN_Y 24
229 #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
230 #define TSTAMP_MIN_X 64
231
232 static void gen_line(char *basep,int inipos,int wmax,
233 int hmax, int line, int count, char *timestr)
234 {
235 int w,i,j,pos=inipos,y;
236 char *p,*s;
237 u8 chr,r,g,b,color;
238
239 /* We will just duplicate the second pixel at the packet */
240 wmax/=2;
241
242 /* Generate a standard color bar pattern */
243 for (w=0;w<wmax;w++) {
244 int colorpos=((w+count)*8/(wmax+1)) % 8;
245 r=bars[colorpos][0];
246 g=bars[colorpos][1];
247 b=bars[colorpos][2];
248
249 for (color=0;color<4;color++) {
250 p=basep+pos;
251
252 switch (color) {
253 case 0:
254 case 2:
255 *p=TO_Y(r,g,b); /* Luminance */
256 break;
257 case 1:
258 *p=TO_U(r,g,b); /* Cb */
259 break;
260 case 3:
261 *p=TO_V(r,g,b); /* Cr */
262 break;
263 }
264 pos++;
265 }
266 }
267
268 /* Checks if it is possible to show timestamp */
269 if (TSTAMP_MAX_Y>=hmax)
270 goto end;
271 if (TSTAMP_MIN_X+strlen(timestr)>=wmax)
272 goto end;
273
274 /* Print stream time */
275 if (line>=TSTAMP_MIN_Y && line<=TSTAMP_MAX_Y) {
276 j=TSTAMP_MIN_X;
277 for (s=timestr;*s;s++) {
278 chr=rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
279 for (i=0;i<7;i++) {
280 if (chr&1<<(7-i)) { /* Font color*/
281 r=bars[BLUE][0];
282 g=bars[BLUE][1];
283 b=bars[BLUE][2];
284 r=g=b=0;
285 g=198;
286 } else { /* Background color */
287 r=bars[WHITE][0];
288 g=bars[WHITE][1];
289 b=bars[WHITE][2];
290 r=g=b=0;
291 }
292
293 pos=inipos+j*2;
294 for (color=0;color<4;color++) {
295 p=basep+pos;
296
297 y=TO_Y(r,g,b);
298
299 switch (color) {
300 case 0:
301 case 2:
302 *p=TO_Y(r,g,b); /* Luminance */
303 break;
304 case 1:
305 *p=TO_U(r,g,b); /* Cb */
306 break;
307 case 3:
308 *p=TO_V(r,g,b); /* Cr */
309 break;
310 }
311 pos++;
312 }
313 j++;
314 }
315 }
316 }
317
318
319 end:
320 return;
321 }
322 static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf)
323 {
324 int h,pos=0;
325 int hmax = buf->vb.height;
326 int wmax = buf->vb.width;
327 struct timeval ts;
328 char *tmpbuf = kmalloc(wmax*2,GFP_KERNEL);
329 void *vbuf=videobuf_to_vmalloc (&buf->vb);
330 /* FIXME: move to dev struct */
331 static int mv_count=0;
332
333 if (!tmpbuf)
334 return;
335
336 for (h=0;h<hmax;h++) {
337 gen_line(tmpbuf,0,wmax,hmax,h,mv_count,
338 dev->timestr);
339 /* FIXME: replacing to __copy_to_user */
340 if (copy_to_user(vbuf+pos,tmpbuf,wmax*2)!=0)
341 dprintk(2,"vivifill copy_to_user failed.\n");
342 pos += wmax*2;
343 }
344
345 mv_count++;
346
347 kfree(tmpbuf);
348
349 /* Updates stream time */
350
351 dev->us+=jiffies_to_usecs(jiffies-dev->jiffies);
352 dev->jiffies=jiffies;
353 if (dev->us>=1000000) {
354 dev->us-=1000000;
355 dev->s++;
356 if (dev->s>=60) {
357 dev->s-=60;
358 dev->m++;
359 if (dev->m>60) {
360 dev->m-=60;
361 dev->h++;
362 if (dev->h>24)
363 dev->h-=24;
364 }
365 }
366 }
367 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
368 dev->h,dev->m,dev->s,(dev->us+500)/1000);
369
370 dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr,
371 (unsigned long)tmpbuf,pos);
372
373 /* Advice that buffer was filled */
374 buf->vb.state = STATE_DONE;
375 buf->vb.field_count++;
376 do_gettimeofday(&ts);
377 buf->vb.ts = ts;
378
379 list_del(&buf->vb.queue);
380 wake_up(&buf->vb.done);
381 }
382
383 static int restart_video_queue(struct vivi_dmaqueue *dma_q);
384
385 static void vivi_thread_tick(struct vivi_dmaqueue *dma_q)
386 {
387 struct vivi_buffer *buf;
388 struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq);
389
390 int bc;
391
392 /* Announces videobuf that all went ok */
393 for (bc = 0;; bc++) {
394 if (list_empty(&dma_q->active)) {
395 dprintk(1,"No active queue to serve\n");
396 break;
397 }
398
399 buf = list_entry(dma_q->active.next,
400 struct vivi_buffer, vb.queue);
401
402 /* Nobody is waiting something to be done, just return */
403 if (!waitqueue_active(&buf->vb.done)) {
404 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
405 return;
406 }
407
408 do_gettimeofday(&buf->vb.ts);
409 dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i);
410
411 /* Fill buffer */
412 vivi_fillbuff(dev,buf);
413
414 if (list_empty(&dma_q->active)) {
415 del_timer(&dma_q->timeout);
416 } else {
417 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
418 }
419 }
420 if (bc != 1)
421 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc);
422 }
423
424 static void vivi_sleep(struct vivi_dmaqueue *dma_q)
425 {
426 int timeout;
427 DECLARE_WAITQUEUE(wait, current);
428
429 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
430
431 add_wait_queue(&dma_q->wq, &wait);
432 if (!kthread_should_stop()) {
433 dma_q->frame++;
434
435 /* Calculate time to wake up */
436 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
437
438 if (timeout <= 0) {
439 int old=dma_q->frame;
440 dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1;
441
442 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
443
444 dprintk(1,"underrun, losed %d frames. "
445 "Now, frame is %d. Waking on %d jiffies\n",
446 dma_q->frame-old,dma_q->frame,timeout);
447 } else
448 dprintk(1,"will sleep for %i jiffies\n",timeout);
449
450 vivi_thread_tick(dma_q);
451
452 schedule_timeout_interruptible (timeout);
453 }
454
455 remove_wait_queue(&dma_q->wq, &wait);
456 try_to_freeze();
457 }
458
459 static int vivi_thread(void *data)
460 {
461 struct vivi_dmaqueue *dma_q=data;
462
463 dprintk(1,"thread started\n");
464
465 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
466 set_freezable();
467
468 for (;;) {
469 vivi_sleep(dma_q);
470
471 if (kthread_should_stop())
472 break;
473 }
474 dprintk(1, "thread: exit\n");
475 return 0;
476 }
477
478 static int vivi_start_thread(struct vivi_dmaqueue *dma_q)
479 {
480 dma_q->frame=0;
481 dma_q->ini_jiffies=jiffies;
482
483 dprintk(1,"%s\n",__FUNCTION__);
484
485 dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
486
487 if (IS_ERR(dma_q->kthread)) {
488 printk(KERN_ERR "vivi: kernel_thread() failed\n");
489 return PTR_ERR(dma_q->kthread);
490 }
491 /* Wakes thread */
492 wake_up_interruptible(&dma_q->wq);
493
494 dprintk(1,"returning from %s\n",__FUNCTION__);
495 return 0;
496 }
497
498 static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
499 {
500 dprintk(1,"%s\n",__FUNCTION__);
501 /* shutdown control thread */
502 if (dma_q->kthread) {
503 kthread_stop(dma_q->kthread);
504 dma_q->kthread=NULL;
505 }
506 }
507
508 static int restart_video_queue(struct vivi_dmaqueue *dma_q)
509 {
510 struct vivi_buffer *buf, *prev;
511 struct list_head *item;
512
513 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
514
515 if (!list_empty(&dma_q->active)) {
516 buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
517 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
518 buf, buf->vb.i);
519
520 dprintk(1,"Restarting video dma\n");
521 vivi_stop_thread(dma_q);
522 // vivi_start_thread(dma_q);
523
524 /* cancel all outstanding capture / vbi requests */
525 list_for_each(item,&dma_q->active) {
526 buf = list_entry(item, struct vivi_buffer, vb.queue);
527
528 list_del(&buf->vb.queue);
529 buf->vb.state = STATE_ERROR;
530 wake_up(&buf->vb.done);
531 }
532 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
533
534 return 0;
535 }
536
537 prev = NULL;
538 for (;;) {
539 if (list_empty(&dma_q->queued))
540 return 0;
541 buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
542 if (NULL == prev) {
543 list_del(&buf->vb.queue);
544 list_add_tail(&buf->vb.queue,&dma_q->active);
545
546 dprintk(1,"Restarting video dma\n");
547 vivi_stop_thread(dma_q);
548 vivi_start_thread(dma_q);
549
550 buf->vb.state = STATE_ACTIVE;
551 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
552 dprintk(2,"[%p/%d] restart_queue - first active\n",
553 buf,buf->vb.i);
554
555 } else if (prev->vb.width == buf->vb.width &&
556 prev->vb.height == buf->vb.height &&
557 prev->fmt == buf->fmt) {
558 list_del(&buf->vb.queue);
559 list_add_tail(&buf->vb.queue,&dma_q->active);
560 buf->vb.state = STATE_ACTIVE;
561 dprintk(2,"[%p/%d] restart_queue - move to active\n",
562 buf,buf->vb.i);
563 } else {
564 return 0;
565 }
566 prev = buf;
567 }
568 }
569
570 static void vivi_vid_timeout(unsigned long data)
571 {
572 struct vivi_dev *dev = (struct vivi_dev*)data;
573 struct vivi_dmaqueue *vidq = &dev->vidq;
574 struct vivi_buffer *buf;
575
576 while (!list_empty(&vidq->active)) {
577 buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
578 list_del(&buf->vb.queue);
579 buf->vb.state = STATE_ERROR;
580 wake_up(&buf->vb.done);
581 printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
582 }
583
584 restart_video_queue(vidq);
585 }
586
587 /* ------------------------------------------------------------------
588 Videobuf operations
589 ------------------------------------------------------------------*/
590 static int
591 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
592 {
593 struct vivi_fh *fh = vq->priv_data;
594
595 *size = fh->width*fh->height*2;
596
597 if (0 == *count)
598 *count = 32;
599
600 while (*size * *count > vid_limit * 1024 * 1024)
601 (*count)--;
602
603 dprintk(1,"%s, count=%d, size=%d\n",__FUNCTION__,*count, *size);
604
605 return 0;
606 }
607
608 static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
609 {
610 dprintk(1,"%s\n",__FUNCTION__);
611
612 if (in_interrupt())
613 BUG();
614
615 videobuf_waiton(&buf->vb,0,0);
616 videobuf_vmalloc_free(&buf->vb);
617 buf->vb.state = STATE_NEEDS_INIT;
618 }
619
620 #define norm_maxw() 1024
621 #define norm_maxh() 768
622 static int
623 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
624 enum v4l2_field field)
625 {
626 struct vivi_fh *fh = vq->priv_data;
627 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
628 int rc, init_buffer = 0;
629
630 dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
631
632 BUG_ON(NULL == fh->fmt);
633 if (fh->width < 48 || fh->width > norm_maxw() ||
634 fh->height < 32 || fh->height > norm_maxh())
635 return -EINVAL;
636 buf->vb.size = fh->width*fh->height*2;
637 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
638 return -EINVAL;
639
640 if (buf->fmt != fh->fmt ||
641 buf->vb.width != fh->width ||
642 buf->vb.height != fh->height ||
643 buf->vb.field != field) {
644 buf->fmt = fh->fmt;
645 buf->vb.width = fh->width;
646 buf->vb.height = fh->height;
647 buf->vb.field = field;
648 init_buffer = 1;
649 }
650
651 if (STATE_NEEDS_INIT == buf->vb.state) {
652 if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
653 goto fail;
654 }
655
656 buf->vb.state = STATE_PREPARED;
657
658 return 0;
659
660 fail:
661 free_buffer(vq,buf);
662 return rc;
663 }
664
665 static void
666 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
667 {
668 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
669 struct vivi_fh *fh = vq->priv_data;
670 struct vivi_dev *dev = fh->dev;
671 struct vivi_dmaqueue *vidq = &dev->vidq;
672 struct vivi_buffer *prev;
673
674 if (!list_empty(&vidq->queued)) {
675 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
676 list_add_tail(&buf->vb.queue,&vidq->queued);
677 buf->vb.state = STATE_QUEUED;
678 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
679 buf, buf->vb.i);
680 } else if (list_empty(&vidq->active)) {
681 list_add_tail(&buf->vb.queue,&vidq->active);
682
683 buf->vb.state = STATE_ACTIVE;
684 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
685 dprintk(2,"[%p/%d] buffer_queue - first active\n",
686 buf, buf->vb.i);
687
688 vivi_start_thread(vidq);
689 } else {
690 prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
691 if (prev->vb.width == buf->vb.width &&
692 prev->vb.height == buf->vb.height &&
693 prev->fmt == buf->fmt) {
694 list_add_tail(&buf->vb.queue,&vidq->active);
695 buf->vb.state = STATE_ACTIVE;
696 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
697 buf, buf->vb.i);
698
699 } else {
700 list_add_tail(&buf->vb.queue,&vidq->queued);
701 buf->vb.state = STATE_QUEUED;
702 dprintk(2,"[%p/%d] buffer_queue - first queued\n",
703 buf, buf->vb.i);
704 }
705 }
706 }
707
708 static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
709 {
710 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
711 struct vivi_fh *fh = vq->priv_data;
712 struct vivi_dev *dev = (struct vivi_dev*)fh->dev;
713 struct vivi_dmaqueue *vidq = &dev->vidq;
714
715 dprintk(1,"%s\n",__FUNCTION__);
716
717 vivi_stop_thread(vidq);
718
719 free_buffer(vq,buf);
720 }
721
722 static struct videobuf_queue_ops vivi_video_qops = {
723 .buf_setup = buffer_setup,
724 .buf_prepare = buffer_prepare,
725 .buf_queue = buffer_queue,
726 .buf_release = buffer_release,
727 };
728
729 /* ------------------------------------------------------------------
730 IOCTL handling
731 ------------------------------------------------------------------*/
732
733
734 static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
735 {
736 /* is it free? */
737 mutex_lock(&dev->lock);
738 if (dev->resources) {
739 /* no, someone else uses it */
740 mutex_unlock(&dev->lock);
741 return 0;
742 }
743 /* it's free, grab it */
744 dev->resources =1;
745 dprintk(1,"res: get\n");
746 mutex_unlock(&dev->lock);
747 return 1;
748 }
749
750 static int res_locked(struct vivi_dev *dev)
751 {
752 return (dev->resources);
753 }
754
755 static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
756 {
757 mutex_lock(&dev->lock);
758 dev->resources = 0;
759 dprintk(1,"res: put\n");
760 mutex_lock(&dev->lock);
761 }
762
763 /* ------------------------------------------------------------------
764 IOCTL vidioc handling
765 ------------------------------------------------------------------*/
766 static int vidioc_querycap (struct file *file, void *priv,
767 struct v4l2_capability *cap)
768 {
769 strcpy(cap->driver, "vivi");
770 strcpy(cap->card, "vivi");
771 cap->version = VIVI_VERSION;
772 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
773 V4L2_CAP_STREAMING |
774 V4L2_CAP_READWRITE;
775 return 0;
776 }
777
778 static int vidioc_enum_fmt_cap (struct file *file, void *priv,
779 struct v4l2_fmtdesc *f)
780 {
781 if (f->index > 0)
782 return -EINVAL;
783
784 strlcpy(f->description,format.name,sizeof(f->description));
785 f->pixelformat = format.fourcc;
786 return 0;
787 }
788
789 static int vidioc_g_fmt_cap (struct file *file, void *priv,
790 struct v4l2_format *f)
791 {
792 struct vivi_fh *fh=priv;
793
794 f->fmt.pix.width = fh->width;
795 f->fmt.pix.height = fh->height;
796 f->fmt.pix.field = fh->vb_vidq.field;
797 f->fmt.pix.pixelformat = fh->fmt->fourcc;
798 f->fmt.pix.bytesperline =
799 (f->fmt.pix.width * fh->fmt->depth) >> 3;
800 f->fmt.pix.sizeimage =
801 f->fmt.pix.height * f->fmt.pix.bytesperline;
802
803 return (0);
804 }
805
806 static int vidioc_try_fmt_cap (struct file *file, void *priv,
807 struct v4l2_format *f)
808 {
809 struct vivi_fmt *fmt;
810 enum v4l2_field field;
811 unsigned int maxw, maxh;
812
813 if (format.fourcc != f->fmt.pix.pixelformat) {
814 dprintk(1,"Fourcc format (0x%08x) invalid. Driver accepts "
815 "only 0x%08x\n",f->fmt.pix.pixelformat,format.fourcc);
816 return -EINVAL;
817 }
818 fmt=&format;
819
820 field = f->fmt.pix.field;
821
822 if (field == V4L2_FIELD_ANY) {
823 field=V4L2_FIELD_INTERLACED;
824 } else if (V4L2_FIELD_INTERLACED != field) {
825 dprintk(1,"Field type invalid.\n");
826 return -EINVAL;
827 }
828
829 maxw = norm_maxw();
830 maxh = norm_maxh();
831
832 f->fmt.pix.field = field;
833 if (f->fmt.pix.height < 32)
834 f->fmt.pix.height = 32;
835 if (f->fmt.pix.height > maxh)
836 f->fmt.pix.height = maxh;
837 if (f->fmt.pix.width < 48)
838 f->fmt.pix.width = 48;
839 if (f->fmt.pix.width > maxw)
840 f->fmt.pix.width = maxw;
841 f->fmt.pix.width &= ~0x03;
842 f->fmt.pix.bytesperline =
843 (f->fmt.pix.width * fmt->depth) >> 3;
844 f->fmt.pix.sizeimage =
845 f->fmt.pix.height * f->fmt.pix.bytesperline;
846
847 return 0;
848 }
849
850 /*FIXME: This seems to be generic enough to be at videodev2 */
851 static int vidioc_s_fmt_cap (struct file *file, void *priv,
852 struct v4l2_format *f)
853 {
854 struct vivi_fh *fh=priv;
855 int ret = vidioc_try_fmt_cap(file,fh,f);
856 if (ret < 0)
857 return (ret);
858
859 fh->fmt = &format;
860 fh->width = f->fmt.pix.width;
861 fh->height = f->fmt.pix.height;
862 fh->vb_vidq.field = f->fmt.pix.field;
863 fh->type = f->type;
864
865 return (0);
866 }
867
868 static int vidioc_reqbufs (struct file *file, void *priv, struct v4l2_requestbuffers *p)
869 {
870 struct vivi_fh *fh=priv;
871
872 return (videobuf_reqbufs(&fh->vb_vidq, p));
873 }
874
875 static int vidioc_querybuf (struct file *file, void *priv, struct v4l2_buffer *p)
876 {
877 struct vivi_fh *fh=priv;
878
879 return (videobuf_querybuf(&fh->vb_vidq, p));
880 }
881
882 static int vidioc_qbuf (struct file *file, void *priv, struct v4l2_buffer *p)
883 {
884 struct vivi_fh *fh=priv;
885
886 return (videobuf_qbuf(&fh->vb_vidq, p));
887 }
888
889 static int vidioc_dqbuf (struct file *file, void *priv, struct v4l2_buffer *p)
890 {
891 struct vivi_fh *fh=priv;
892
893 return (videobuf_dqbuf(&fh->vb_vidq, p,
894 file->f_flags & O_NONBLOCK));
895 }
896
897 #ifdef CONFIG_VIDEO_V4L1_COMPAT
898 static int vidiocgmbuf (struct file *file, void *priv, struct video_mbuf *mbuf)
899 {
900 struct vivi_fh *fh=priv;
901
902 return videobuf_cgmbuf (&fh->vb_vidq, mbuf, 8);
903 }
904 #endif
905
906 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
907 {
908 struct vivi_fh *fh=priv;
909 struct vivi_dev *dev = fh->dev;
910
911 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
912 return -EINVAL;
913 if (i != fh->type)
914 return -EINVAL;
915
916 if (!res_get(dev,fh))
917 return -EBUSY;
918 return (videobuf_streamon(&fh->vb_vidq));
919 }
920
921 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
922 {
923 struct vivi_fh *fh=priv;
924 struct vivi_dev *dev = fh->dev;
925
926 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
927 return -EINVAL;
928 if (i != fh->type)
929 return -EINVAL;
930
931 videobuf_streamoff(&fh->vb_vidq);
932 res_free(dev,fh);
933
934 return (0);
935 }
936
937 static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id *i)
938 {
939 return 0;
940 }
941
942 /* only one input in this sample driver */
943 static int vidioc_enum_input (struct file *file, void *priv,
944 struct v4l2_input *inp)
945 {
946 if (inp->index != 0)
947 return -EINVAL;
948
949 inp->type = V4L2_INPUT_TYPE_CAMERA;
950 inp->std = V4L2_STD_NTSC_M;
951 strcpy(inp->name,"Camera");
952
953 return (0);
954 }
955
956 static int vidioc_g_input (struct file *file, void *priv, unsigned int *i)
957 {
958 *i = 0;
959
960 return (0);
961 }
962 static int vidioc_s_input (struct file *file, void *priv, unsigned int i)
963 {
964 if (i > 0)
965 return -EINVAL;
966
967 return (0);
968 }
969
970 /* --- controls ---------------------------------------------- */
971 static int vidioc_queryctrl (struct file *file, void *priv,
972 struct v4l2_queryctrl *qc)
973 {
974 int i;
975
976 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
977 if (qc->id && qc->id == vivi_qctrl[i].id) {
978 memcpy(qc, &(vivi_qctrl[i]),
979 sizeof(*qc));
980 return (0);
981 }
982
983 return -EINVAL;
984 }
985
986 static int vidioc_g_ctrl (struct file *file, void *priv,
987 struct v4l2_control *ctrl)
988 {
989 int i;
990
991 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
992 if (ctrl->id == vivi_qctrl[i].id) {
993 ctrl->value=qctl_regs[i];
994 return (0);
995 }
996
997 return -EINVAL;
998 }
999 static int vidioc_s_ctrl (struct file *file, void *priv,
1000 struct v4l2_control *ctrl)
1001 {
1002 int i;
1003
1004 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1005 if (ctrl->id == vivi_qctrl[i].id) {
1006 if (ctrl->value <
1007 vivi_qctrl[i].minimum
1008 || ctrl->value >
1009 vivi_qctrl[i].maximum) {
1010 return (-ERANGE);
1011 }
1012 qctl_regs[i]=ctrl->value;
1013 return (0);
1014 }
1015 return -EINVAL;
1016 }
1017
1018 /* ------------------------------------------------------------------
1019 File operations for the device
1020 ------------------------------------------------------------------*/
1021
1022 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1023
1024 static int vivi_open(struct inode *inode, struct file *file)
1025 {
1026 int minor = iminor(inode);
1027 struct vivi_dev *h,*dev = NULL;
1028 struct vivi_fh *fh;
1029 struct list_head *list;
1030 enum v4l2_buf_type type = 0;
1031 int i;
1032
1033 printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
1034
1035 list_for_each(list,&vivi_devlist) {
1036 h = list_entry(list, struct vivi_dev, vivi_devlist);
1037 if (h->vfd.minor == minor) {
1038 dev = h;
1039 type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1040 }
1041 }
1042 if (NULL == dev)
1043 return -ENODEV;
1044
1045
1046
1047 /* If more than one user, mutex should be added */
1048 dev->users++;
1049
1050 dprintk(1,"open minor=%d type=%s users=%d\n",
1051 minor,v4l2_type_names[type],dev->users);
1052
1053 /* allocate + initialize per filehandle data */
1054 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
1055 if (NULL == fh) {
1056 dev->users--;
1057 return -ENOMEM;
1058 }
1059
1060 file->private_data = fh;
1061 fh->dev = dev;
1062
1063 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1064 fh->fmt = &format;
1065 fh->width = 640;
1066 fh->height = 480;
1067
1068 /* Put all controls at a sane state */
1069 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1070 qctl_regs[i] =vivi_qctrl[i].default_value;
1071
1072 dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1073 (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
1074 dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued));
1075 dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active));
1076
1077 /* Resets frame counters */
1078 dev->h=0;
1079 dev->m=0;
1080 dev->s=0;
1081 dev->us=0;
1082 dev->jiffies=jiffies;
1083 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
1084 dev->h,dev->m,dev->s,(dev->us+500)/1000);
1085
1086 videobuf_queue_vmalloc_init(&fh->vb_vidq, &vivi_video_qops,
1087 NULL, NULL,
1088 fh->type,
1089 V4L2_FIELD_INTERLACED,
1090 sizeof(struct vivi_buffer),fh);
1091
1092 return 0;
1093 }
1094
1095 static ssize_t
1096 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1097 {
1098 struct vivi_fh *fh = file->private_data;
1099
1100 if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1101 if (res_locked(fh->dev))
1102 return -EBUSY;
1103 return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0,
1104 file->f_flags & O_NONBLOCK);
1105 }
1106 return 0;
1107 }
1108
1109 static unsigned int
1110 vivi_poll(struct file *file, struct poll_table_struct *wait)
1111 {
1112 struct vivi_fh *fh = file->private_data;
1113 struct vivi_buffer *buf;
1114 struct videobuf_queue *q = &fh->vb_vidq;
1115
1116 dprintk(1,"%s\n",__FUNCTION__);
1117
1118 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1119 return POLLERR;
1120
1121 return videobuf_poll_stream(file, q, wait);
1122 }
1123
1124 static int vivi_release(struct inode *inode, struct file *file)
1125 {
1126 struct vivi_fh *fh = file->private_data;
1127 struct vivi_dev *dev = fh->dev;
1128 struct vivi_dmaqueue *vidq = &dev->vidq;
1129
1130 int minor = iminor(inode);
1131
1132 vivi_stop_thread(vidq);
1133 videobuf_mmap_free(&fh->vb_vidq);
1134
1135 kfree (fh);
1136
1137 dev->users--;
1138
1139 printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users);
1140
1141 return 0;
1142 }
1143
1144 static int
1145 vivi_mmap(struct file *file, struct vm_area_struct * vma)
1146 {
1147 struct vivi_fh *fh = file->private_data;
1148 int ret;
1149
1150 dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma);
1151
1152 ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
1153
1154 dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1155 (unsigned long)vma->vm_start,
1156 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1157 ret);
1158
1159 return ret;
1160 }
1161
1162 static const struct file_operations vivi_fops = {
1163 .owner = THIS_MODULE,
1164 .open = vivi_open,
1165 .release = vivi_release,
1166 .read = vivi_read,
1167 .poll = vivi_poll,
1168 .ioctl = video_ioctl2, /* V4L2 ioctl handler */
1169 .mmap = vivi_mmap,
1170 .llseek = no_llseek,
1171 };
1172
1173 static struct video_device vivi = {
1174 .name = "vivi",
1175 .type = VID_TYPE_CAPTURE,
1176 .hardware = 0,
1177 .fops = &vivi_fops,
1178 .minor = -1,
1179 // .release = video_device_release,
1180
1181 .vidioc_querycap = vidioc_querycap,
1182 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1183 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1184 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1185 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1186 .vidioc_reqbufs = vidioc_reqbufs,
1187 .vidioc_querybuf = vidioc_querybuf,
1188 .vidioc_qbuf = vidioc_qbuf,
1189 .vidioc_dqbuf = vidioc_dqbuf,
1190 .vidioc_s_std = vidioc_s_std,
1191 .vidioc_enum_input = vidioc_enum_input,
1192 .vidioc_g_input = vidioc_g_input,
1193 .vidioc_s_input = vidioc_s_input,
1194 .vidioc_queryctrl = vidioc_queryctrl,
1195 .vidioc_g_ctrl = vidioc_g_ctrl,
1196 .vidioc_s_ctrl = vidioc_s_ctrl,
1197 .vidioc_streamon = vidioc_streamon,
1198 .vidioc_streamoff = vidioc_streamoff,
1199 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1200 .vidiocgmbuf = vidiocgmbuf,
1201 #endif
1202 .tvnorms = V4L2_STD_NTSC_M,
1203 .current_norm = V4L2_STD_NTSC_M,
1204 };
1205 /* -----------------------------------------------------------------
1206 Initialization and module stuff
1207 ------------------------------------------------------------------*/
1208
1209 static int __init vivi_init(void)
1210 {
1211 int ret;
1212 struct vivi_dev *dev;
1213
1214 dev = kzalloc(sizeof(*dev),GFP_KERNEL);
1215 if (NULL == dev)
1216 return -ENOMEM;
1217 list_add_tail(&dev->vivi_devlist,&vivi_devlist);
1218
1219 /* init video dma queues */
1220 INIT_LIST_HEAD(&dev->vidq.active);
1221 INIT_LIST_HEAD(&dev->vidq.queued);
1222 init_waitqueue_head(&dev->vidq.wq);
1223
1224 /* initialize locks */
1225 mutex_init(&dev->lock);
1226
1227 dev->vidq.timeout.function = vivi_vid_timeout;
1228 dev->vidq.timeout.data = (unsigned long)dev;
1229 init_timer(&dev->vidq.timeout);
1230
1231 ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
1232 printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
1233 return ret;
1234 }
1235
1236 static void __exit vivi_exit(void)
1237 {
1238 struct vivi_dev *h;
1239 struct list_head *list;
1240
1241 while (!list_empty(&vivi_devlist)) {
1242 list = vivi_devlist.next;
1243 list_del(list);
1244 h = list_entry(list, struct vivi_dev, vivi_devlist);
1245 kfree (h);
1246 }
1247 video_unregister_device(&vivi);
1248 }
1249
1250 module_init(vivi_init);
1251 module_exit(vivi_exit);
1252
1253 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1254 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1255 MODULE_LICENSE("Dual BSD/GPL");
1256
1257 module_param(video_nr, int, 0);
1258
1259 module_param_named(debug,vivi.debug, int, 0644);
1260 MODULE_PARM_DESC(debug,"activates debug info");
1261
1262 module_param(vid_limit,int,0644);
1263 MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
1264
Support for the Chinese Samsung S3C2440 based development boards