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V4L/DVB (6255): Convert vivi to use videobuf-vmalloc
[linux-2.6/x86.git] / drivers / media / video / vivi.c
blobc14e2b3e42413253394d07dd90ab2362388290ed
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
233 static void gen_line(char *basep,int inipos,int wmax,
234 int hmax, int line, char *timestr)
235 {
236 int w,i,j,pos=inipos,y;
237 char *p,*s;
238 u8 chr,r,g,b,color;
239
240 /* We will just duplicate the second pixel at the packet */
241 wmax/=2;
242
243 /* Generate a standard color bar pattern */
244 for (w=0;w<wmax;w++) {
245 r=bars[w*7/wmax][0];
246 g=bars[w*7/wmax][1];
247 b=bars[w*7/wmax][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
331 if (!tmpbuf)
332 return;
333
334 for (h=0;h<hmax;h++) {
335 gen_line(tmpbuf,0,wmax,hmax,h,dev->timestr);
336 /* FIXME: replacing to __copy_to_user */
337 if (copy_to_user(vbuf+pos,tmpbuf,wmax*2)!=0)
338 dprintk(2,"vivifill copy_to_user failed.\n");
339 pos += wmax*2;
340 }
341
342 kfree(tmpbuf);
343
344 /* Updates stream time */
345
346 dev->us+=jiffies_to_usecs(jiffies-dev->jiffies);
347 dev->jiffies=jiffies;
348 if (dev->us>=1000000) {
349 dev->us-=1000000;
350 dev->s++;
351 if (dev->s>=60) {
352 dev->s-=60;
353 dev->m++;
354 if (dev->m>60) {
355 dev->m-=60;
356 dev->h++;
357 if (dev->h>24)
358 dev->h-=24;
359 }
360 }
361 }
362 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
363 dev->h,dev->m,dev->s,(dev->us+500)/1000);
364
365 dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr,
366 (unsigned long)tmpbuf,pos);
367
368 /* Advice that buffer was filled */
369 buf->vb.state = STATE_DONE;
370 buf->vb.field_count++;
371 do_gettimeofday(&ts);
372 buf->vb.ts = ts;
373
374 list_del(&buf->vb.queue);
375 wake_up(&buf->vb.done);
376 }
377
378 static int restart_video_queue(struct vivi_dmaqueue *dma_q);
379
380 static void vivi_thread_tick(struct vivi_dmaqueue *dma_q)
381 {
382 struct vivi_buffer *buf;
383 struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq);
384
385 int bc;
386
387 /* Announces videobuf that all went ok */
388 for (bc = 0;; bc++) {
389 if (list_empty(&dma_q->active)) {
390 dprintk(1,"No active queue to serve\n");
391 break;
392 }
393
394 buf = list_entry(dma_q->active.next,
395 struct vivi_buffer, vb.queue);
396
397 /* Nobody is waiting something to be done, just return */
398 if (!waitqueue_active(&buf->vb.done)) {
399 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
400 return;
401 }
402
403 do_gettimeofday(&buf->vb.ts);
404 dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i);
405
406 /* Fill buffer */
407 vivi_fillbuff(dev,buf);
408
409 if (list_empty(&dma_q->active)) {
410 del_timer(&dma_q->timeout);
411 } else {
412 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
413 }
414 }
415 if (bc != 1)
416 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc);
417 }
418
419 static void vivi_sleep(struct vivi_dmaqueue *dma_q)
420 {
421 int timeout;
422 DECLARE_WAITQUEUE(wait, current);
423
424 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
425
426 add_wait_queue(&dma_q->wq, &wait);
427 if (!kthread_should_stop()) {
428 dma_q->frame++;
429
430 /* Calculate time to wake up */
431 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
432
433 if (timeout <= 0) {
434 int old=dma_q->frame;
435 dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1;
436
437 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
438
439 dprintk(1,"underrun, losed %d frames. "
440 "Now, frame is %d. Waking on %d jiffies\n",
441 dma_q->frame-old,dma_q->frame,timeout);
442 } else
443 dprintk(1,"will sleep for %i jiffies\n",timeout);
444
445 vivi_thread_tick(dma_q);
446
447 schedule_timeout_interruptible (timeout);
448 }
449
450 remove_wait_queue(&dma_q->wq, &wait);
451 try_to_freeze();
452 }
453
454 static int vivi_thread(void *data)
455 {
456 struct vivi_dmaqueue *dma_q=data;
457
458 dprintk(1,"thread started\n");
459
460 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
461 set_freezable();
462
463 for (;;) {
464 vivi_sleep(dma_q);
465
466 if (kthread_should_stop())
467 break;
468 }
469 dprintk(1, "thread: exit\n");
470 return 0;
471 }
472
473 static int vivi_start_thread(struct vivi_dmaqueue *dma_q)
474 {
475 dma_q->frame=0;
476 dma_q->ini_jiffies=jiffies;
477
478 dprintk(1,"%s\n",__FUNCTION__);
479
480 dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
481
482 if (IS_ERR(dma_q->kthread)) {
483 printk(KERN_ERR "vivi: kernel_thread() failed\n");
484 return PTR_ERR(dma_q->kthread);
485 }
486 /* Wakes thread */
487 wake_up_interruptible(&dma_q->wq);
488
489 dprintk(1,"returning from %s\n",__FUNCTION__);
490 return 0;
491 }
492
493 static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
494 {
495 dprintk(1,"%s\n",__FUNCTION__);
496 /* shutdown control thread */
497 if (dma_q->kthread) {
498 kthread_stop(dma_q->kthread);
499 dma_q->kthread=NULL;
500 }
501 }
502
503 static int restart_video_queue(struct vivi_dmaqueue *dma_q)
504 {
505 struct vivi_buffer *buf, *prev;
506 struct list_head *item;
507
508 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
509
510 if (!list_empty(&dma_q->active)) {
511 buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
512 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
513 buf, buf->vb.i);
514
515 dprintk(1,"Restarting video dma\n");
516 vivi_stop_thread(dma_q);
517 // vivi_start_thread(dma_q);
518
519 /* cancel all outstanding capture / vbi requests */
520 list_for_each(item,&dma_q->active) {
521 buf = list_entry(item, struct vivi_buffer, vb.queue);
522
523 list_del(&buf->vb.queue);
524 buf->vb.state = STATE_ERROR;
525 wake_up(&buf->vb.done);
526 }
527 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
528
529 return 0;
530 }
531
532 prev = NULL;
533 for (;;) {
534 if (list_empty(&dma_q->queued))
535 return 0;
536 buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
537 if (NULL == prev) {
538 list_del(&buf->vb.queue);
539 list_add_tail(&buf->vb.queue,&dma_q->active);
540
541 dprintk(1,"Restarting video dma\n");
542 vivi_stop_thread(dma_q);
543 vivi_start_thread(dma_q);
544
545 buf->vb.state = STATE_ACTIVE;
546 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
547 dprintk(2,"[%p/%d] restart_queue - first active\n",
548 buf,buf->vb.i);
549
550 } else if (prev->vb.width == buf->vb.width &&
551 prev->vb.height == buf->vb.height &&
552 prev->fmt == buf->fmt) {
553 list_del(&buf->vb.queue);
554 list_add_tail(&buf->vb.queue,&dma_q->active);
555 buf->vb.state = STATE_ACTIVE;
556 dprintk(2,"[%p/%d] restart_queue - move to active\n",
557 buf,buf->vb.i);
558 } else {
559 return 0;
560 }
561 prev = buf;
562 }
563 }
564
565 static void vivi_vid_timeout(unsigned long data)
566 {
567 struct vivi_dev *dev = (struct vivi_dev*)data;
568 struct vivi_dmaqueue *vidq = &dev->vidq;
569 struct vivi_buffer *buf;
570
571 while (!list_empty(&vidq->active)) {
572 buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
573 list_del(&buf->vb.queue);
574 buf->vb.state = STATE_ERROR;
575 wake_up(&buf->vb.done);
576 printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
577 }
578
579 restart_video_queue(vidq);
580 }
581
582 /* ------------------------------------------------------------------
583 Videobuf operations
584 ------------------------------------------------------------------*/
585 static int
586 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
587 {
588 struct vivi_fh *fh = vq->priv_data;
589
590 *size = fh->width*fh->height*2;
591
592 if (0 == *count)
593 *count = 32;
594
595 while (*size * *count > vid_limit * 1024 * 1024)
596 (*count)--;
597
598 dprintk(1,"%s, count=%d, size=%d\n",__FUNCTION__,*count, *size);
599
600 return 0;
601 }
602
603 static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
604 {
605 dprintk(1,"%s\n",__FUNCTION__);
606
607 if (in_interrupt())
608 BUG();
609
610 videobuf_waiton(&buf->vb,0,0);
611 videobuf_vmalloc_free(&buf->vb);
612 buf->vb.state = STATE_NEEDS_INIT;
613 }
614
615 #define norm_maxw() 1024
616 #define norm_maxh() 768
617 static int
618 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
619 enum v4l2_field field)
620 {
621 struct vivi_fh *fh = vq->priv_data;
622 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
623 int rc, init_buffer = 0;
624
625 dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
626
627 BUG_ON(NULL == fh->fmt);
628 if (fh->width < 48 || fh->width > norm_maxw() ||
629 fh->height < 32 || fh->height > norm_maxh())
630 return -EINVAL;
631 buf->vb.size = fh->width*fh->height*2;
632 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
633 return -EINVAL;
634
635 if (buf->fmt != fh->fmt ||
636 buf->vb.width != fh->width ||
637 buf->vb.height != fh->height ||
638 buf->vb.field != field) {
639 buf->fmt = fh->fmt;
640 buf->vb.width = fh->width;
641 buf->vb.height = fh->height;
642 buf->vb.field = field;
643 init_buffer = 1;
644 }
645
646 if (STATE_NEEDS_INIT == buf->vb.state) {
647 if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
648 goto fail;
649 }
650
651 buf->vb.state = STATE_PREPARED;
652
653 return 0;
654
655 fail:
656 free_buffer(vq,buf);
657 return rc;
658 }
659
660 static void
661 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
662 {
663 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
664 struct vivi_fh *fh = vq->priv_data;
665 struct vivi_dev *dev = fh->dev;
666 struct vivi_dmaqueue *vidq = &dev->vidq;
667 struct vivi_buffer *prev;
668
669 if (!list_empty(&vidq->queued)) {
670 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
671 list_add_tail(&buf->vb.queue,&vidq->queued);
672 buf->vb.state = STATE_QUEUED;
673 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
674 buf, buf->vb.i);
675 } else if (list_empty(&vidq->active)) {
676 list_add_tail(&buf->vb.queue,&vidq->active);
677
678 buf->vb.state = STATE_ACTIVE;
679 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
680 dprintk(2,"[%p/%d] buffer_queue - first active\n",
681 buf, buf->vb.i);
682
683 vivi_start_thread(vidq);
684 } else {
685 prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
686 if (prev->vb.width == buf->vb.width &&
687 prev->vb.height == buf->vb.height &&
688 prev->fmt == buf->fmt) {
689 list_add_tail(&buf->vb.queue,&vidq->active);
690 buf->vb.state = STATE_ACTIVE;
691 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
692 buf, buf->vb.i);
693
694 } else {
695 list_add_tail(&buf->vb.queue,&vidq->queued);
696 buf->vb.state = STATE_QUEUED;
697 dprintk(2,"[%p/%d] buffer_queue - first queued\n",
698 buf, buf->vb.i);
699 }
700 }
701 }
702
703 static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
704 {
705 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
706 struct vivi_fh *fh = vq->priv_data;
707 struct vivi_dev *dev = (struct vivi_dev*)fh->dev;
708 struct vivi_dmaqueue *vidq = &dev->vidq;
709
710 dprintk(1,"%s\n",__FUNCTION__);
711
712 vivi_stop_thread(vidq);
713
714 free_buffer(vq,buf);
715 }
716
717 static struct videobuf_queue_ops vivi_video_qops = {
718 .buf_setup = buffer_setup,
719 .buf_prepare = buffer_prepare,
720 .buf_queue = buffer_queue,
721 .buf_release = buffer_release,
722 };
723
724 /* ------------------------------------------------------------------
725 IOCTL handling
726 ------------------------------------------------------------------*/
727
728
729 static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
730 {
731 /* is it free? */
732 mutex_lock(&dev->lock);
733 if (dev->resources) {
734 /* no, someone else uses it */
735 mutex_unlock(&dev->lock);
736 return 0;
737 }
738 /* it's free, grab it */
739 dev->resources =1;
740 dprintk(1,"res: get\n");
741 mutex_unlock(&dev->lock);
742 return 1;
743 }
744
745 static int res_locked(struct vivi_dev *dev)
746 {
747 return (dev->resources);
748 }
749
750 static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
751 {
752 mutex_lock(&dev->lock);
753 dev->resources = 0;
754 dprintk(1,"res: put\n");
755 mutex_lock(&dev->lock);
756 }
757
758 /* ------------------------------------------------------------------
759 IOCTL vidioc handling
760 ------------------------------------------------------------------*/
761 static int vidioc_querycap (struct file *file, void *priv,
762 struct v4l2_capability *cap)
763 {
764 strcpy(cap->driver, "vivi");
765 strcpy(cap->card, "vivi");
766 cap->version = VIVI_VERSION;
767 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
768 V4L2_CAP_STREAMING |
769 V4L2_CAP_READWRITE;
770 return 0;
771 }
772
773 static int vidioc_enum_fmt_cap (struct file *file, void *priv,
774 struct v4l2_fmtdesc *f)
775 {
776 if (f->index > 0)
777 return -EINVAL;
778
779 strlcpy(f->description,format.name,sizeof(f->description));
780 f->pixelformat = format.fourcc;
781 return 0;
782 }
783
784 static int vidioc_g_fmt_cap (struct file *file, void *priv,
785 struct v4l2_format *f)
786 {
787 struct vivi_fh *fh=priv;
788
789 f->fmt.pix.width = fh->width;
790 f->fmt.pix.height = fh->height;
791 f->fmt.pix.field = fh->vb_vidq.field;
792 f->fmt.pix.pixelformat = fh->fmt->fourcc;
793 f->fmt.pix.bytesperline =
794 (f->fmt.pix.width * fh->fmt->depth) >> 3;
795 f->fmt.pix.sizeimage =
796 f->fmt.pix.height * f->fmt.pix.bytesperline;
797
798 return (0);
799 }
800
801 static int vidioc_try_fmt_cap (struct file *file, void *priv,
802 struct v4l2_format *f)
803 {
804 struct vivi_fmt *fmt;
805 enum v4l2_field field;
806 unsigned int maxw, maxh;
807
808 if (format.fourcc != f->fmt.pix.pixelformat) {
809 dprintk(1,"Fourcc format (0x%08x) invalid. Driver accepts "
810 "only 0x%08x\n",f->fmt.pix.pixelformat,format.fourcc);
811 return -EINVAL;
812 }
813 fmt=&format;
814
815 field = f->fmt.pix.field;
816
817 if (field == V4L2_FIELD_ANY) {
818 // field=V4L2_FIELD_INTERLACED;
819 field=V4L2_FIELD_SEQ_TB;
820 } else if (V4L2_FIELD_INTERLACED != field) {
821 dprintk(1,"Field type invalid.\n");
822 return -EINVAL;
823 }
824
825 maxw = norm_maxw();
826 maxh = norm_maxh();
827
828 f->fmt.pix.field = field;
829 if (f->fmt.pix.height < 32)
830 f->fmt.pix.height = 32;
831 if (f->fmt.pix.height > maxh)
832 f->fmt.pix.height = maxh;
833 if (f->fmt.pix.width < 48)
834 f->fmt.pix.width = 48;
835 if (f->fmt.pix.width > maxw)
836 f->fmt.pix.width = maxw;
837 f->fmt.pix.width &= ~0x03;
838 f->fmt.pix.bytesperline =
839 (f->fmt.pix.width * fmt->depth) >> 3;
840 f->fmt.pix.sizeimage =
841 f->fmt.pix.height * f->fmt.pix.bytesperline;
842
843 return 0;
844 }
845
846 /*FIXME: This seems to be generic enough to be at videodev2 */
847 static int vidioc_s_fmt_cap (struct file *file, void *priv,
848 struct v4l2_format *f)
849 {
850 struct vivi_fh *fh=priv;
851 int ret = vidioc_try_fmt_cap(file,fh,f);
852 if (ret < 0)
853 return (ret);
854
855 fh->fmt = &format;
856 fh->width = f->fmt.pix.width;
857 fh->height = f->fmt.pix.height;
858 fh->vb_vidq.field = f->fmt.pix.field;
859 fh->type = f->type;
860
861 return (0);
862 }
863
864 static int vidioc_reqbufs (struct file *file, void *priv, struct v4l2_requestbuffers *p)
865 {
866 struct vivi_fh *fh=priv;
867
868 return (videobuf_reqbufs(&fh->vb_vidq, p));
869 }
870
871 static int vidioc_querybuf (struct file *file, void *priv, struct v4l2_buffer *p)
872 {
873 struct vivi_fh *fh=priv;
874
875 return (videobuf_querybuf(&fh->vb_vidq, p));
876 }
877
878 static int vidioc_qbuf (struct file *file, void *priv, struct v4l2_buffer *p)
879 {
880 struct vivi_fh *fh=priv;
881
882 return (videobuf_qbuf(&fh->vb_vidq, p));
883 }
884
885 static int vidioc_dqbuf (struct file *file, void *priv, struct v4l2_buffer *p)
886 {
887 struct vivi_fh *fh=priv;
888
889 return (videobuf_dqbuf(&fh->vb_vidq, p,
890 file->f_flags & O_NONBLOCK));
891 }
892
893 #ifdef CONFIG_VIDEO_V4L1_COMPAT
894 static int vidiocgmbuf (struct file *file, void *priv, struct video_mbuf *mbuf)
895 {
896 struct vivi_fh *fh=priv;
897
898 return videobuf_cgmbuf (&fh->vb_vidq, mbuf, 8);
899 }
900 #endif
901
902 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
903 {
904 struct vivi_fh *fh=priv;
905 struct vivi_dev *dev = fh->dev;
906
907 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
908 return -EINVAL;
909 if (i != fh->type)
910 return -EINVAL;
911
912 if (!res_get(dev,fh))
913 return -EBUSY;
914 return (videobuf_streamon(&fh->vb_vidq));
915 }
916
917 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
918 {
919 struct vivi_fh *fh=priv;
920 struct vivi_dev *dev = fh->dev;
921
922 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
923 return -EINVAL;
924 if (i != fh->type)
925 return -EINVAL;
926
927 videobuf_streamoff(&fh->vb_vidq);
928 res_free(dev,fh);
929
930 return (0);
931 }
932
933 static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id *i)
934 {
935 return 0;
936 }
937
938 /* only one input in this sample driver */
939 static int vidioc_enum_input (struct file *file, void *priv,
940 struct v4l2_input *inp)
941 {
942 if (inp->index != 0)
943 return -EINVAL;
944
945 inp->type = V4L2_INPUT_TYPE_CAMERA;
946 inp->std = V4L2_STD_NTSC_M;
947 strcpy(inp->name,"Camera");
948
949 return (0);
950 }
951
952 static int vidioc_g_input (struct file *file, void *priv, unsigned int *i)
953 {
954 *i = 0;
955
956 return (0);
957 }
958 static int vidioc_s_input (struct file *file, void *priv, unsigned int i)
959 {
960 if (i > 0)
961 return -EINVAL;
962
963 return (0);
964 }
965
966 /* --- controls ---------------------------------------------- */
967 static int vidioc_queryctrl (struct file *file, void *priv,
968 struct v4l2_queryctrl *qc)
969 {
970 int i;
971
972 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
973 if (qc->id && qc->id == vivi_qctrl[i].id) {
974 memcpy(qc, &(vivi_qctrl[i]),
975 sizeof(*qc));
976 return (0);
977 }
978
979 return -EINVAL;
980 }
981
982 static int vidioc_g_ctrl (struct file *file, void *priv,
983 struct v4l2_control *ctrl)
984 {
985 int i;
986
987 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
988 if (ctrl->id == vivi_qctrl[i].id) {
989 ctrl->value=qctl_regs[i];
990 return (0);
991 }
992
993 return -EINVAL;
994 }
995 static int vidioc_s_ctrl (struct file *file, void *priv,
996 struct v4l2_control *ctrl)
997 {
998 int i;
999
1000 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1001 if (ctrl->id == vivi_qctrl[i].id) {
1002 if (ctrl->value <
1003 vivi_qctrl[i].minimum
1004 || ctrl->value >
1005 vivi_qctrl[i].maximum) {
1006 return (-ERANGE);
1007 }
1008 qctl_regs[i]=ctrl->value;
1009 return (0);
1010 }
1011 return -EINVAL;
1012 }
1013
1014 /* ------------------------------------------------------------------
1015 File operations for the device
1016 ------------------------------------------------------------------*/
1017
1018 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1019
1020 static int vivi_open(struct inode *inode, struct file *file)
1021 {
1022 int minor = iminor(inode);
1023 struct vivi_dev *h,*dev = NULL;
1024 struct vivi_fh *fh;
1025 struct list_head *list;
1026 enum v4l2_buf_type type = 0;
1027 int i;
1028
1029 printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
1030
1031 list_for_each(list,&vivi_devlist) {
1032 h = list_entry(list, struct vivi_dev, vivi_devlist);
1033 if (h->vfd.minor == minor) {
1034 dev = h;
1035 type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1036 }
1037 }
1038 if (NULL == dev)
1039 return -ENODEV;
1040
1041
1042
1043 /* If more than one user, mutex should be added */
1044 dev->users++;
1045
1046 dprintk(1,"open minor=%d type=%s users=%d\n",
1047 minor,v4l2_type_names[type],dev->users);
1048
1049 /* allocate + initialize per filehandle data */
1050 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
1051 if (NULL == fh) {
1052 dev->users--;
1053 return -ENOMEM;
1054 }
1055
1056 file->private_data = fh;
1057 fh->dev = dev;
1058
1059 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1060 fh->fmt = &format;
1061 fh->width = 640;
1062 fh->height = 480;
1063
1064 /* Put all controls at a sane state */
1065 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1066 qctl_regs[i] =vivi_qctrl[i].default_value;
1067
1068 dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1069 (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
1070 dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued));
1071 dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active));
1072
1073 /* Resets frame counters */
1074 dev->h=0;
1075 dev->m=0;
1076 dev->s=0;
1077 dev->us=0;
1078 dev->jiffies=jiffies;
1079 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
1080 dev->h,dev->m,dev->s,(dev->us+500)/1000);
1081
1082 videobuf_queue_vmalloc_init(&fh->vb_vidq, &vivi_video_qops,
1083 NULL, NULL,
1084 fh->type,
1085 V4L2_FIELD_INTERLACED,
1086 sizeof(struct vivi_buffer),fh);
1087
1088 return 0;
1089 }
1090
1091 static ssize_t
1092 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1093 {
1094 struct vivi_fh *fh = file->private_data;
1095
1096 if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1097 if (res_locked(fh->dev))
1098 return -EBUSY;
1099 return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0,
1100 file->f_flags & O_NONBLOCK);
1101 }
1102 return 0;
1103 }
1104
1105 static unsigned int
1106 vivi_poll(struct file *file, struct poll_table_struct *wait)
1107 {
1108 struct vivi_fh *fh = file->private_data;
1109 struct vivi_buffer *buf;
1110
1111 dprintk(1,"%s\n",__FUNCTION__);
1112
1113 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1114 return POLLERR;
1115
1116 if (res_get(fh->dev,fh)) {
1117 dprintk(1,"poll: mmap interface\n");
1118 /* streaming capture */
1119 if (list_empty(&fh->vb_vidq.stream))
1120 return POLLERR;
1121 buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream);
1122 } else {
1123 dprintk(1,"poll: read() interface\n");
1124 /* read() capture */
1125 buf = (struct vivi_buffer*)fh->vb_vidq.read_buf;
1126 if (NULL == buf)
1127 return POLLERR;
1128 }
1129 poll_wait(file, &buf->vb.done, wait);
1130 if (buf->vb.state == STATE_DONE ||
1131 buf->vb.state == STATE_ERROR)
1132 return POLLIN|POLLRDNORM;
1133 return 0;
1134 }
1135
1136 static int vivi_release(struct inode *inode, struct file *file)
1137 {
1138 struct vivi_fh *fh = file->private_data;
1139 struct vivi_dev *dev = fh->dev;
1140 struct vivi_dmaqueue *vidq = &dev->vidq;
1141
1142 int minor = iminor(inode);
1143
1144 vivi_stop_thread(vidq);
1145 videobuf_mmap_free(&fh->vb_vidq);
1146
1147 kfree (fh);
1148
1149 dev->users--;
1150
1151 printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users);
1152
1153 return 0;
1154 }
1155
1156 static int
1157 vivi_mmap(struct file *file, struct vm_area_struct * vma)
1158 {
1159 struct vivi_fh *fh = file->private_data;
1160 int ret;
1161
1162 dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma);
1163
1164 ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
1165
1166 dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1167 (unsigned long)vma->vm_start,
1168 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1169 ret);
1170
1171 return ret;
1172 }
1173
1174 static const struct file_operations vivi_fops = {
1175 .owner = THIS_MODULE,
1176 .open = vivi_open,
1177 .release = vivi_release,
1178 .read = vivi_read,
1179 .poll = vivi_poll,
1180 .ioctl = video_ioctl2, /* V4L2 ioctl handler */
1181 .mmap = vivi_mmap,
1182 .llseek = no_llseek,
1183 };
1184
1185 static struct video_device vivi = {
1186 .name = "vivi",
1187 .type = VID_TYPE_CAPTURE,
1188 .hardware = 0,
1189 .fops = &vivi_fops,
1190 .minor = -1,
1191 // .release = video_device_release,
1192
1193 .vidioc_querycap = vidioc_querycap,
1194 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1195 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1196 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1197 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1198 .vidioc_reqbufs = vidioc_reqbufs,
1199 .vidioc_querybuf = vidioc_querybuf,
1200 .vidioc_qbuf = vidioc_qbuf,
1201 .vidioc_dqbuf = vidioc_dqbuf,
1202 .vidioc_s_std = vidioc_s_std,
1203 .vidioc_enum_input = vidioc_enum_input,
1204 .vidioc_g_input = vidioc_g_input,
1205 .vidioc_s_input = vidioc_s_input,
1206 .vidioc_queryctrl = vidioc_queryctrl,
1207 .vidioc_g_ctrl = vidioc_g_ctrl,
1208 .vidioc_s_ctrl = vidioc_s_ctrl,
1209 .vidioc_streamon = vidioc_streamon,
1210 .vidioc_streamoff = vidioc_streamoff,
1211 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1212 .vidiocgmbuf = vidiocgmbuf,
1213 #endif
1214 .tvnorms = V4L2_STD_NTSC_M,
1215 .current_norm = V4L2_STD_NTSC_M,
1216 };
1217 /* -----------------------------------------------------------------
1218 Initialization and module stuff
1219 ------------------------------------------------------------------*/
1220
1221 static int __init vivi_init(void)
1222 {
1223 int ret;
1224 struct vivi_dev *dev;
1225
1226 dev = kzalloc(sizeof(*dev),GFP_KERNEL);
1227 if (NULL == dev)
1228 return -ENOMEM;
1229 list_add_tail(&dev->vivi_devlist,&vivi_devlist);
1230
1231 /* init video dma queues */
1232 INIT_LIST_HEAD(&dev->vidq.active);
1233 INIT_LIST_HEAD(&dev->vidq.queued);
1234 init_waitqueue_head(&dev->vidq.wq);
1235
1236 /* initialize locks */
1237 mutex_init(&dev->lock);
1238
1239 dev->vidq.timeout.function = vivi_vid_timeout;
1240 dev->vidq.timeout.data = (unsigned long)dev;
1241 init_timer(&dev->vidq.timeout);
1242
1243 ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
1244 printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
1245 return ret;
1246 }
1247
1248 static void __exit vivi_exit(void)
1249 {
1250 struct vivi_dev *h;
1251 struct list_head *list;
1252
1253 while (!list_empty(&vivi_devlist)) {
1254 list = vivi_devlist.next;
1255 list_del(list);
1256 h = list_entry(list, struct vivi_dev, vivi_devlist);
1257 kfree (h);
1258 }
1259 video_unregister_device(&vivi);
1260 }
1261
1262 module_init(vivi_init);
1263 module_exit(vivi_exit);
1264
1265 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1266 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1267 MODULE_LICENSE("Dual BSD/GPL");
1268
1269 module_param(video_nr, int, 0);
1270
1271 module_param_named(debug,vivi.debug, int, 0644);
1272 MODULE_PARM_DESC(debug,"activates debug info");
1273
1274 module_param(vid_limit,int,0644);
1275 MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
1276
x86 "subsystem" repository