2 * Virtual Video driver - This code emulates a real video device with v4l2 api
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/
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
15 #include <linux/module.h>
16 #include <linux/delay.h>
17 #include <linux/errno.h>
19 #include <linux/kernel.h>
20 #include <linux/slab.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>
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>
40 /* Wake up at about 30 fps */
41 #define WAKE_NUMERATOR 30
42 #define WAKE_DENOMINATOR 1001
43 #define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
45 /* These timers are for 1 fps - used only for testing */
46 //#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
47 //#define BUFFER_TIMEOUT msecs_to_jiffies(5000) /* 5 seconds */
52 #define kzalloc(size, flags) \
54 void *__ret = kmalloc(size, flags); \
56 memset(__ret, 0, size); \
61 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
62 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
63 MODULE_LICENSE("Dual BSD/GPL");
65 #define VIVI_MAJOR_VERSION 0
66 #define VIVI_MINOR_VERSION 4
67 #define VIVI_RELEASE 0
68 #define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
70 static int video_nr
= -1; /* /dev/videoN, -1 for autodetect */
71 module_param(video_nr
, int, 0);
74 module_param(debug
, int, 0);
76 static unsigned int vid_limit
= 16;
77 module_param(vid_limit
,int,0644);
78 MODULE_PARM_DESC(vid_limit
,"capture memory limit in megabytes");
80 /* supported controls */
81 static struct v4l2_queryctrl vivi_qctrl
[] = {
83 .id
= V4L2_CID_AUDIO_VOLUME
,
88 .default_value
= 65535,
90 .type
= V4L2_CTRL_TYPE_INTEGER
,
92 .id
= V4L2_CID_BRIGHTNESS
,
93 .type
= V4L2_CTRL_TYPE_INTEGER
,
101 .id
= V4L2_CID_CONTRAST
,
102 .type
= V4L2_CTRL_TYPE_INTEGER
,
107 .default_value
= 0x10,
110 .id
= V4L2_CID_SATURATION
,
111 .type
= V4L2_CTRL_TYPE_INTEGER
,
112 .name
= "Saturation",
116 .default_value
= 127,
120 .type
= V4L2_CTRL_TYPE_INTEGER
,
130 static int qctl_regs
[ARRAY_SIZE(vivi_qctrl
)];
132 #define dprintk(level,fmt, arg...) \
134 if (debug >= (level)) \
135 printk(KERN_DEBUG "vivi: " fmt , ## arg); \
138 /* ------------------------------------------------------------------
140 ------------------------------------------------------------------*/
144 u32 fourcc
; /* v4l2 format id */
148 static struct vivi_fmt format
= {
149 .name
= "4:2:2, packed, YUYV",
150 .fourcc
= V4L2_PIX_FMT_YUYV
,
156 struct scatterlist
*sg
;
159 /* buffer for one video frame */
161 /* common v4l buffer stuff -- must be first */
162 struct videobuf_buffer vb
;
164 struct vivi_fmt
*fmt
;
166 struct sg_to_addr
*to_addr
;
169 struct vivi_dmaqueue
{
170 struct list_head active
;
171 struct list_head queued
;
172 struct timer_list timeout
;
174 /* thread for generating video stream*/
175 struct task_struct
*kthread
;
176 wait_queue_head_t wq
;
177 /* Counters to control fps rate */
182 static LIST_HEAD(vivi_devlist
);
185 struct list_head vivi_devlist
;
187 struct semaphore lock
;
191 /* various device info */
192 unsigned int resources
;
193 struct video_device video_dev
;
195 struct vivi_dmaqueue vidq
;
197 /* Several counters */
198 int h
,m
,s
,us
,jiffies
;
203 struct vivi_dev
*dev
;
206 struct vivi_fmt
*fmt
;
207 unsigned int width
,height
;
208 struct videobuf_queue vb_vidq
;
210 enum v4l2_buf_type type
;
213 /* ------------------------------------------------------------------
214 DMA and thread functions
215 ------------------------------------------------------------------*/
217 /* Bars and Colors should match positions */
229 static u8 bars
[8][3] = {
231 {204,204,204}, /* white */
232 {208,208, 0}, /* ambar */
233 { 0,206,206}, /* cyan */
234 { 0,239, 0}, /* green */
235 {239, 0,239}, /* magenta */
236 {205, 0, 0}, /* red */
237 { 0, 0,255}, /* blue */
241 #define TO_Y(r,g,b) (((16829*r +33039*g +6416*b + 32768)>>16)+16)
242 /* RGB to V(Cr) Color transform */
243 #define TO_V(r,g,b) (((28784*r -24103*g -4681*b + 32768)>>16)+128)
244 /* RGB to U(Cb) Color transform */
245 #define TO_U(r,g,b) (((-9714*r -19070*g +28784*b + 32768)>>16)+128)
247 #define TSTAMP_MIN_Y 24
248 #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
249 #define TSTAMP_MIN_X 64
251 void prep_to_addr(struct sg_to_addr to_addr
[],struct videobuf_buffer
*vb
)
255 for (i
=0;i
<vb
->dma
.nr_pages
;i
++) {
256 to_addr
[i
].sg
=&vb
->dma
.sglist
[i
];
258 pos
+= vb
->dma
.sglist
[i
].length
;
262 inline int get_addr_pos(int pos
, int pages
, struct sg_to_addr to_addr
[])
264 int p1
=0,p2
=pages
-1,p3
=pages
/2;
267 BUG_ON (pos
>=to_addr
[p2
].pos
+to_addr
[p2
].sg
->length
);
270 if (pos
< to_addr
[p3
].pos
) {
277 if (pos
>= to_addr
[p2
].pos
)
283 void gen_line(struct sg_to_addr to_addr
[],int inipos
,int pages
,int wmax
,
284 int hmax
, int line
, char *timestr
)
286 int w
,i
,j
,pos
=inipos
,pgpos
,oldpg
,y
;
291 /* Get first addr pointed to pixel position */
292 oldpg
=get_addr_pos(pos
,pages
,to_addr
);
293 pg
=pfn_to_page(to_addr
[oldpg
].sg
->dma_address
>> PAGE_SHIFT
);
294 basep
= kmap_atomic(pg
, KM_BOUNCE_READ
)+to_addr
[oldpg
].sg
->offset
;
296 /* We will just duplicate the second pixel at the packet */
299 /* Generate a standard color bar pattern */
300 for (w
=0;w
<wmax
;w
++) {
305 for (color
=0;color
<4;color
++) {
306 pgpos
=get_addr_pos(pos
,pages
,to_addr
);
308 pg
=pfn_to_page(to_addr
[pgpos
].sg
->dma_address
>> PAGE_SHIFT
);
309 kunmap_atomic(basep
, KM_BOUNCE_READ
);
310 basep
= kmap_atomic(pg
, KM_BOUNCE_READ
)+to_addr
[pgpos
].sg
->offset
;
313 p
=basep
+pos
-to_addr
[pgpos
].pos
;
318 *p
=TO_Y(r
,g
,b
); /* Luminance */
321 *p
=TO_U(r
,g
,b
); /* Cb */
324 *p
=TO_V(r
,g
,b
); /* Cr */
331 /* Checks if it is possible to show timestamp */
332 if (TSTAMP_MAX_Y
>=hmax
)
334 if (TSTAMP_MIN_X
+strlen(timestr
)>=wmax
)
337 /* Print stream time */
338 if (line
>=TSTAMP_MIN_Y
&& line
<=TSTAMP_MAX_Y
) {
340 for (s
=timestr
;*s
;s
++) {
341 chr
=rom8x16_bits
[(*s
-0x30)*16+line
-TSTAMP_MIN_Y
];
343 if (chr
&1<<(7-i
)) { /* Font color*/
349 } else { /* Background color */
357 for (color
=0;color
<4;color
++) {
358 pgpos
=get_addr_pos(pos
,pages
,to_addr
);
360 pg
=pfn_to_page(to_addr
[pgpos
].
365 basep
= kmap_atomic(pg
,
367 to_addr
[pgpos
].sg
->offset
;
370 p
=basep
+pos
-to_addr
[pgpos
].pos
;
377 *p
=TO_Y(r
,g
,b
); /* Luminance */
380 *p
=TO_U(r
,g
,b
); /* Cb */
383 *p
=TO_V(r
,g
,b
); /* Cr */
395 kunmap_atomic(basep
, KM_BOUNCE_READ
);
397 static void vivi_fillbuff(struct vivi_dev
*dev
,struct vivi_buffer
*buf
)
400 int hmax
= buf
->vb
.height
;
401 int wmax
= buf
->vb
.width
;
402 struct videobuf_buffer
*vb
=&buf
->vb
;
403 struct sg_to_addr
*to_addr
=buf
->to_addr
;
406 /* Test if DMA mapping is ready */
407 if (!vb
->dma
.sglist
[0].dma_address
)
410 prep_to_addr(to_addr
,vb
);
412 /* Check if there is enough memory */
413 BUG_ON(buf
->vb
.dma
.nr_pages
<< PAGE_SHIFT
< (buf
->vb
.width
*buf
->vb
.height
)*2);
415 for (h
=0;h
<hmax
;h
++) {
416 gen_line(to_addr
,pos
,vb
->dma
.nr_pages
,wmax
,hmax
,h
,dev
->timestr
);
420 /* Updates stream time */
422 dev
->us
+=jiffies_to_usecs(jiffies
-dev
->jiffies
);
423 dev
->jiffies
=jiffies
;
424 if (dev
->us
>=1000000) {
438 sprintf(dev
->timestr
,"%02d:%02d:%02d:%03d",
439 dev
->h
,dev
->m
,dev
->s
,(dev
->us
+500)/1000);
441 dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev
->timestr
,
442 (unsigned long)buf
->vb
.dma
.vmalloc
,pos
);
444 /* Advice that buffer was filled */
445 buf
->vb
.state
= STATE_DONE
;
446 buf
->vb
.field_count
++;
447 do_gettimeofday(&ts
);
450 list_del(&buf
->vb
.queue
);
451 wake_up(&buf
->vb
.done
);
454 static int restart_video_queue(struct vivi_dmaqueue
*dma_q
);
456 static void vivi_thread_tick(struct vivi_dmaqueue
*dma_q
)
458 struct vivi_buffer
*buf
;
459 struct vivi_dev
*dev
= container_of(dma_q
,struct vivi_dev
,vidq
);
463 /* Announces videobuf that all went ok */
464 for (bc
= 0;; bc
++) {
465 if (list_empty(&dma_q
->active
)) {
466 dprintk(1,"No active queue to serve\n");
470 buf
= list_entry(dma_q
->active
.next
,
471 struct vivi_buffer
, vb
.queue
);
473 /* Nobody is waiting something to be done, just return */
474 if (!waitqueue_active(&buf
->vb
.done
)) {
475 mod_timer(&dma_q
->timeout
, jiffies
+BUFFER_TIMEOUT
);
479 do_gettimeofday(&buf
->vb
.ts
);
480 dprintk(2,"[%p/%d] wakeup\n",buf
,buf
->vb
.i
);
483 vivi_fillbuff(dev
,buf
);
485 if (list_empty(&dma_q
->active
)) {
486 del_timer(&dma_q
->timeout
);
488 mod_timer(&dma_q
->timeout
, jiffies
+BUFFER_TIMEOUT
);
491 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__
,bc
);
494 void vivi_sleep(struct vivi_dmaqueue
*dma_q
)
497 DECLARE_WAITQUEUE(wait
, current
);
499 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__
,(unsigned long)dma_q
);
501 add_wait_queue(&dma_q
->wq
, &wait
);
502 if (!kthread_should_stop()) {
505 /* Calculate time to wake up */
506 timeout
=dma_q
->ini_jiffies
+msecs_to_jiffies((dma_q
->frame
*WAKE_NUMERATOR
*1000)/WAKE_DENOMINATOR
)-jiffies
;
509 int old
=dma_q
->frame
;
510 dma_q
->frame
=(jiffies_to_msecs(jiffies
-dma_q
->ini_jiffies
)*WAKE_DENOMINATOR
)/(WAKE_NUMERATOR
*1000)+1;
512 timeout
=dma_q
->ini_jiffies
+msecs_to_jiffies((dma_q
->frame
*WAKE_NUMERATOR
*1000)/WAKE_DENOMINATOR
)-jiffies
;
514 dprintk(1,"underrun, losed %d frames. "
515 "Now, frame is %d. Waking on %d jiffies\n",
516 dma_q
->frame
-old
,dma_q
->frame
,timeout
);
518 dprintk(1,"will sleep for %i jiffies\n",timeout
);
520 vivi_thread_tick(dma_q
);
522 schedule_timeout_interruptible (timeout
);
525 remove_wait_queue(&dma_q
->wq
, &wait
);
529 int vivi_thread(void *data
)
531 struct vivi_dmaqueue
*dma_q
=data
;
533 dprintk(1,"thread started\n");
538 if (kthread_should_stop())
541 dprintk(1, "thread: exit\n");
545 int vivi_start_thread(struct vivi_dmaqueue
*dma_q
)
548 dma_q
->ini_jiffies
=jiffies
;
550 dprintk(1,"%s\n",__FUNCTION__
);
551 init_waitqueue_head(&dma_q
->wq
);
553 dma_q
->kthread
= kthread_run(vivi_thread
, dma_q
, "vivi");
555 if (dma_q
->kthread
== NULL
) {
556 printk(KERN_ERR
"vivi: kernel_thread() failed\n");
559 dprintk(1,"returning from %s\n",__FUNCTION__
);
563 void vivi_stop_thread(struct vivi_dmaqueue
*dma_q
)
565 dprintk(1,"%s\n",__FUNCTION__
);
566 /* shutdown control thread */
567 if (dma_q
->kthread
) {
568 kthread_stop(dma_q
->kthread
);
573 static int restart_video_queue(struct vivi_dmaqueue
*dma_q
)
575 struct vivi_buffer
*buf
, *prev
;
576 struct list_head
*item
;
578 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__
,(unsigned long)dma_q
);
580 if (!list_empty(&dma_q
->active
)) {
581 buf
= list_entry(dma_q
->active
.next
, struct vivi_buffer
, vb
.queue
);
582 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
585 dprintk(1,"Restarting video dma\n");
586 vivi_stop_thread(dma_q
);
587 // vivi_start_thread(dma_q);
589 /* cancel all outstanding capture / vbi requests */
590 list_for_each(item
,&dma_q
->active
) {
591 buf
= list_entry(item
, struct vivi_buffer
, vb
.queue
);
593 list_del(&buf
->vb
.queue
);
594 buf
->vb
.state
= STATE_ERROR
;
595 wake_up(&buf
->vb
.done
);
597 mod_timer(&dma_q
->timeout
, jiffies
+BUFFER_TIMEOUT
);
604 if (list_empty(&dma_q
->queued
))
606 buf
= list_entry(dma_q
->queued
.next
, struct vivi_buffer
, vb
.queue
);
608 list_del(&buf
->vb
.queue
);
609 list_add_tail(&buf
->vb
.queue
,&dma_q
->active
);
611 dprintk(1,"Restarting video dma\n");
612 vivi_stop_thread(dma_q
);
613 vivi_start_thread(dma_q
);
615 buf
->vb
.state
= STATE_ACTIVE
;
616 mod_timer(&dma_q
->timeout
, jiffies
+BUFFER_TIMEOUT
);
617 dprintk(2,"[%p/%d] restart_queue - first active\n",
620 } else if (prev
->vb
.width
== buf
->vb
.width
&&
621 prev
->vb
.height
== buf
->vb
.height
&&
622 prev
->fmt
== buf
->fmt
) {
623 list_del(&buf
->vb
.queue
);
624 list_add_tail(&buf
->vb
.queue
,&dma_q
->active
);
625 buf
->vb
.state
= STATE_ACTIVE
;
626 dprintk(2,"[%p/%d] restart_queue - move to active\n",
635 static void vivi_vid_timeout(unsigned long data
)
637 struct vivi_dev
*dev
= (struct vivi_dev
*)data
;
638 struct vivi_dmaqueue
*vidq
= &dev
->vidq
;
639 struct vivi_buffer
*buf
;
641 while (!list_empty(&vidq
->active
)) {
642 buf
= list_entry(vidq
->active
.next
, struct vivi_buffer
, vb
.queue
);
643 list_del(&buf
->vb
.queue
);
644 buf
->vb
.state
= STATE_ERROR
;
645 wake_up(&buf
->vb
.done
);
646 printk("vivi/0: [%p/%d] timeout\n", buf
, buf
->vb
.i
);
649 restart_video_queue(vidq
);
652 /* ------------------------------------------------------------------
654 ------------------------------------------------------------------*/
656 buffer_setup(struct videobuf_queue
*vq
, unsigned int *count
, unsigned int *size
)
658 struct vivi_fh
*fh
= vq
->priv_data
;
660 *size
= fh
->width
*fh
->height
*2;
664 while (*size
* *count
> vid_limit
* 1024 * 1024)
670 free_buffer(struct videobuf_queue
*vq
, struct vivi_buffer
*buf
)
672 dprintk(1,"%s\n",__FUNCTION__
);
677 /*FIXME: Maybe a spinlock is required here */
681 videobuf_waiton(&buf
->vb
,0,0);
682 videobuf_dma_unmap(vq
, &buf
->vb
.dma
);
683 videobuf_dma_free(&buf
->vb
.dma
);
684 buf
->vb
.state
= STATE_NEEDS_INIT
;
687 #define norm_maxw() 1024
688 #define norm_maxh() 768
690 buffer_prepare(struct videobuf_queue
*vq
, struct videobuf_buffer
*vb
,
691 enum v4l2_field field
)
693 struct vivi_fh
*fh
= vq
->priv_data
;
694 struct vivi_buffer
*buf
= container_of(vb
,struct vivi_buffer
,vb
);
695 int rc
, init_buffer
= 0;
697 // dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
699 BUG_ON(NULL
== fh
->fmt
);
700 if (fh
->width
< 48 || fh
->width
> norm_maxw() ||
701 fh
->height
< 32 || fh
->height
> norm_maxh())
703 buf
->vb
.size
= fh
->width
*fh
->height
*2;
704 if (0 != buf
->vb
.baddr
&& buf
->vb
.bsize
< buf
->vb
.size
)
707 if (buf
->fmt
!= fh
->fmt
||
708 buf
->vb
.width
!= fh
->width
||
709 buf
->vb
.height
!= fh
->height
||
710 buf
->vb
.field
!= field
) {
712 buf
->vb
.width
= fh
->width
;
713 buf
->vb
.height
= fh
->height
;
714 buf
->vb
.field
= field
;
718 if (STATE_NEEDS_INIT
== buf
->vb
.state
) {
719 if (0 != (rc
= videobuf_iolock(vq
,&buf
->vb
,NULL
)))
723 buf
->vb
.state
= STATE_PREPARED
;
725 if (NULL
== (buf
->to_addr
= kmalloc(sizeof(*buf
->to_addr
) * vb
->dma
.nr_pages
,GFP_KERNEL
))) {
738 buffer_queue(struct videobuf_queue
*vq
, struct videobuf_buffer
*vb
)
740 struct vivi_buffer
*buf
= container_of(vb
,struct vivi_buffer
,vb
);
741 struct vivi_fh
*fh
= vq
->priv_data
;
742 struct vivi_dev
*dev
= fh
->dev
;
743 struct vivi_dmaqueue
*vidq
= &dev
->vidq
;
744 struct vivi_buffer
*prev
;
746 if (!list_empty(&vidq
->queued
)) {
747 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf
->vb
.queue
);
748 list_add_tail(&buf
->vb
.queue
,&vidq
->queued
);
749 buf
->vb
.state
= STATE_QUEUED
;
750 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
752 } else if (list_empty(&vidq
->active
)) {
753 list_add_tail(&buf
->vb
.queue
,&vidq
->active
);
755 buf
->vb
.state
= STATE_ACTIVE
;
756 mod_timer(&vidq
->timeout
, jiffies
+BUFFER_TIMEOUT
);
757 dprintk(2,"[%p/%d] buffer_queue - first active\n",
760 vivi_start_thread(vidq
);
762 prev
= list_entry(vidq
->active
.prev
, struct vivi_buffer
, vb
.queue
);
763 if (prev
->vb
.width
== buf
->vb
.width
&&
764 prev
->vb
.height
== buf
->vb
.height
&&
765 prev
->fmt
== buf
->fmt
) {
766 list_add_tail(&buf
->vb
.queue
,&vidq
->active
);
767 buf
->vb
.state
= STATE_ACTIVE
;
768 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
772 list_add_tail(&buf
->vb
.queue
,&vidq
->queued
);
773 buf
->vb
.state
= STATE_QUEUED
;
774 dprintk(2,"[%p/%d] buffer_queue - first queued\n",
780 static void buffer_release(struct videobuf_queue
*vq
, struct videobuf_buffer
*vb
)
782 struct vivi_buffer
*buf
= container_of(vb
,struct vivi_buffer
,vb
);
783 struct vivi_fh
*fh
= vq
->priv_data
;
784 struct vivi_dev
*dev
= (struct vivi_dev
*)fh
->dev
;
785 struct vivi_dmaqueue
*vidq
= &dev
->vidq
;
787 dprintk(1,"%s\n",__FUNCTION__
);
789 vivi_stop_thread(vidq
);
794 int vivi_map_sg (void *dev
, struct scatterlist
*sg
, int nents
,
799 dprintk(1,"%s, number of pages=%d\n",__FUNCTION__
,nents
);
800 BUG_ON(direction
== DMA_NONE
);
802 for (i
= 0; i
< nents
; i
++ ) {
805 sg
[i
].dma_address
= page_to_phys(sg
[i
].page
) + sg
[i
].offset
;
811 int vivi_unmap_sg(void *dev
,struct scatterlist
*sglist
,int nr_pages
,
814 dprintk(1,"%s\n",__FUNCTION__
);
818 int vivi_dma_sync_sg(void *dev
,struct scatterlist
*sglist
,int nr_pages
,
821 // dprintk(1,"%s\n",__FUNCTION__);
823 // flush_write_buffers();
827 static struct videobuf_queue_ops vivi_video_qops
= {
828 .buf_setup
= buffer_setup
,
829 .buf_prepare
= buffer_prepare
,
830 .buf_queue
= buffer_queue
,
831 .buf_release
= buffer_release
,
833 /* Non-pci handling routines */
834 .vb_map_sg
= vivi_map_sg
,
835 .vb_dma_sync_sg
= vivi_dma_sync_sg
,
836 .vb_unmap_sg
= vivi_unmap_sg
,
839 /* ------------------------------------------------------------------
841 ------------------------------------------------------------------*/
843 static int vivi_try_fmt(struct vivi_dev
*dev
, struct vivi_fh
*fh
,
844 struct v4l2_format
*f
)
846 struct vivi_fmt
*fmt
;
847 enum v4l2_field field
;
848 unsigned int maxw
, maxh
;
850 if (format
.fourcc
!= f
->fmt
.pix
.pixelformat
) {
851 dprintk(1,"Fourcc format invalid.\n");
856 field
= f
->fmt
.pix
.field
;
858 if (field
== V4L2_FIELD_ANY
) {
859 // field=V4L2_FIELD_INTERLACED;
860 field
=V4L2_FIELD_SEQ_TB
;
861 } else if (V4L2_FIELD_INTERLACED
!= field
) {
862 dprintk(1,"Field type invalid.\n");
869 f
->fmt
.pix
.field
= field
;
870 if (f
->fmt
.pix
.height
< 32)
871 f
->fmt
.pix
.height
= 32;
872 if (f
->fmt
.pix
.height
> maxh
)
873 f
->fmt
.pix
.height
= maxh
;
874 if (f
->fmt
.pix
.width
< 48)
875 f
->fmt
.pix
.width
= 48;
876 if (f
->fmt
.pix
.width
> maxw
)
877 f
->fmt
.pix
.width
= maxw
;
878 f
->fmt
.pix
.width
&= ~0x03;
879 f
->fmt
.pix
.bytesperline
=
880 (f
->fmt
.pix
.width
* fmt
->depth
) >> 3;
881 f
->fmt
.pix
.sizeimage
=
882 f
->fmt
.pix
.height
* f
->fmt
.pix
.bytesperline
;
887 static int res_get(struct vivi_dev
*dev
, struct vivi_fh
*fh
)
891 if (dev
->resources
) {
892 /* no, someone else uses it */
896 /* it's free, grab it */
898 dprintk(1,"res: get\n");
903 static inline int res_locked(struct vivi_dev
*dev
)
905 return (dev
->resources
);
908 static void res_free(struct vivi_dev
*dev
, struct vivi_fh
*fh
)
912 dprintk(1,"res: put\n");
916 static int vivi_do_ioctl(struct inode
*inode
, struct file
*file
, unsigned int cmd
, void *arg
)
918 struct vivi_fh
*fh
= file
->private_data
;
919 struct vivi_dev
*dev
= fh
->dev
;
923 if (_IOC_DIR(cmd
) & _IOC_WRITE
)
924 v4l_printk_ioctl_arg("vivi(w)",cmd
, arg
);
925 else if (!_IOC_DIR(cmd
) & _IOC_READ
) {
926 v4l_print_ioctl("vivi", cmd
);
931 /* --- capabilities ------------------------------------------ */
932 case VIDIOC_QUERYCAP
:
934 struct v4l2_capability
*cap
= (struct v4l2_capability
*)arg
;
936 memset(cap
, 0, sizeof(*cap
));
938 strcpy(cap
->driver
, "vivi");
939 strcpy(cap
->card
, "vivi");
940 cap
->version
= VIVI_VERSION
;
942 V4L2_CAP_VIDEO_CAPTURE
|
947 /* --- capture ioctls ---------------------------------------- */
948 case VIDIOC_ENUM_FMT
:
950 struct v4l2_fmtdesc
*f
= arg
;
951 enum v4l2_buf_type type
;
957 if (f
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
963 case V4L2_BUF_TYPE_VIDEO_CAPTURE
:
968 memset(f
,0,sizeof(*f
));
972 strlcpy(f
->description
,format
.name
,sizeof(f
->description
));
973 f
->pixelformat
= format
.fourcc
;
982 struct v4l2_format
*f
= (struct v4l2_format
*)arg
;
984 if (f
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
989 memset(&f
->fmt
.pix
,0,sizeof(f
->fmt
.pix
));
990 f
->fmt
.pix
.width
= fh
->width
;
991 f
->fmt
.pix
.height
= fh
->height
;
992 f
->fmt
.pix
.field
= fh
->vb_vidq
.field
;
993 f
->fmt
.pix
.pixelformat
= fh
->fmt
->fourcc
;
994 f
->fmt
.pix
.bytesperline
=
995 (f
->fmt
.pix
.width
* fh
->fmt
->depth
) >> 3;
996 f
->fmt
.pix
.sizeimage
=
997 f
->fmt
.pix
.height
* f
->fmt
.pix
.bytesperline
;
1002 struct v4l2_format
*f
= arg
;
1004 if (f
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1005 dprintk(1,"Only capture supported.\n");
1010 ret
= vivi_try_fmt(dev
,fh
,f
);
1015 fh
->width
= f
->fmt
.pix
.width
;
1016 fh
->height
= f
->fmt
.pix
.height
;
1017 fh
->vb_vidq
.field
= f
->fmt
.pix
.field
;
1022 case VIDIOC_TRY_FMT
:
1024 struct v4l2_format
*f
= arg
;
1025 if (f
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1030 ret
=vivi_try_fmt(dev
,fh
,f
);
1033 case VIDIOC_REQBUFS
:
1034 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1038 ret
=videobuf_reqbufs(&fh
->vb_vidq
, arg
);
1040 case VIDIOC_QUERYBUF
:
1041 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1045 ret
=videobuf_querybuf(&fh
->vb_vidq
, arg
);
1048 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1052 ret
=videobuf_qbuf(&fh
->vb_vidq
, arg
);
1055 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1059 ret
=videobuf_dqbuf(&fh
->vb_vidq
, arg
,
1060 file
->f_flags
& O_NONBLOCK
);
1063 /* --- streaming capture ------------------------------------- */
1066 struct video_mbuf
*mbuf
= arg
;
1067 struct videobuf_queue
*q
=&fh
->vb_vidq
;
1068 struct v4l2_requestbuffers req
;
1071 memset(&req
,0,sizeof(req
));
1074 req
.memory
= V4L2_MEMORY_MMAP
;
1075 ret
= videobuf_reqbufs(q
,&req
);
1078 memset(mbuf
,0,sizeof(*mbuf
));
1079 mbuf
->frames
= req
.count
;
1081 for (i
= 0; i
< mbuf
->frames
; i
++) {
1082 mbuf
->offsets
[i
] = q
->bufs
[i
]->boff
;
1083 mbuf
->size
+= q
->bufs
[i
]->bsize
;
1088 case VIDIOC_STREAMON
:
1090 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1092 if (!res_get(dev
,fh
))
1094 ret
=videobuf_streamon(&fh
->vb_vidq
);
1097 case VIDIOC_STREAMOFF
:
1099 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1103 ret
= videobuf_streamoff(&fh
->vb_vidq
);
1109 /* ---------- tv norms ---------- */
1110 case VIDIOC_ENUMSTD
:
1112 struct v4l2_standard
*e
= arg
;
1118 ret
= v4l2_video_std_construct(e
, V4L2_STD_NTSC_M
, "NTSC-M");
1120 /* Allows vivi to use different fps from video std */
1121 e
->frameperiod
.numerator
= WAKE_NUMERATOR
;
1122 e
->frameperiod
.denominator
= WAKE_DENOMINATOR
;
1128 v4l2_std_id
*id
= arg
;
1130 *id
= V4L2_STD_NTSC_M
;
1137 /* ------ input switching ---------- */
1138 case VIDIOC_ENUMINPUT
:
1139 { /* only one input in this sample driver */
1140 struct v4l2_input
*inp
= arg
;
1142 if (inp
->index
!= 0) {
1146 memset(inp
, 0, sizeof(*inp
));
1149 inp
->type
= V4L2_INPUT_TYPE_CAMERA
;
1150 inp
->std
= V4L2_STD_NTSC_M
;
1151 strcpy(inp
->name
,"Camera");
1154 case VIDIOC_G_INPUT
:
1156 unsigned int *i
= arg
;
1161 case VIDIOC_S_INPUT
:
1163 unsigned int *i
= arg
;
1170 /* --- controls ---------------------------------------------- */
1171 case VIDIOC_QUERYCTRL
:
1173 struct v4l2_queryctrl
*qc
= arg
;
1176 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
1177 if (qc
->id
&& qc
->id
== vivi_qctrl
[i
].id
) {
1178 memcpy(qc
, &(vivi_qctrl
[i
]),
1188 struct v4l2_control
*ctrl
= arg
;
1191 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
1192 if (ctrl
->id
== vivi_qctrl
[i
].id
) {
1193 ctrl
->value
=qctl_regs
[i
];
1202 struct v4l2_control
*ctrl
= arg
;
1204 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
1205 if (ctrl
->id
== vivi_qctrl
[i
].id
) {
1207 vivi_qctrl
[i
].minimum
1209 vivi_qctrl
[i
].maximum
) {
1213 qctl_regs
[i
]=ctrl
->value
;
1220 ret
=v4l_compat_translate_ioctl(inode
,file
,cmd
,arg
,vivi_do_ioctl
);
1225 v4l_print_ioctl("vivi(err)", cmd
);
1226 dprintk(1,"errcode=%d\n",ret
);
1227 } else if (_IOC_DIR(cmd
) & _IOC_READ
)
1228 v4l_printk_ioctl_arg("vivi(r)",cmd
, arg
);
1234 static int vivi_ioctl(struct inode
*inode
, struct file
*file
, unsigned int cmd
, unsigned long arg
)
1236 return video_usercopy(inode
, file
, cmd
, arg
, vivi_do_ioctl
);
1239 /* ------------------------------------------------------------------
1240 File operations for the device
1241 ------------------------------------------------------------------*/
1243 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1245 static int vivi_open(struct inode
*inode
, struct file
*file
)
1247 int minor
= iminor(inode
);
1248 struct vivi_dev
*h
,*dev
= NULL
;
1250 struct list_head
*list
;
1251 enum v4l2_buf_type type
= 0;
1254 printk(KERN_DEBUG
"vivi: open called (minor=%d)\n",minor
);
1256 list_for_each(list
,&vivi_devlist
) {
1257 h
= list_entry(list
, struct vivi_dev
, vivi_devlist
);
1258 if (h
->video_dev
.minor
== minor
) {
1260 type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1267 /* If more than one user, mutex should be added */
1270 dprintk(1,"open minor=%d type=%s users=%d\n",
1271 minor
,v4l2_type_names
[type
],dev
->users
);
1273 /* allocate + initialize per filehandle data */
1274 fh
= kzalloc(sizeof(*fh
),GFP_KERNEL
);
1280 file
->private_data
= fh
;
1282 fh
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1287 /* Put all controls at a sane state */
1288 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
1289 qctl_regs
[i
] =vivi_qctrl
[i
].default_value
;
1291 dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1292 (unsigned long)fh
,(unsigned long)dev
,(unsigned long)&dev
->vidq
);
1293 dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev
->vidq
.queued
));
1294 dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev
->vidq
.active
));
1296 /* Resets frame counters */
1301 dev
->jiffies
=jiffies
;
1302 sprintf(dev
->timestr
,"%02d:%02d:%02d:%03d",
1303 dev
->h
,dev
->m
,dev
->s
,(dev
->us
+500)/1000);
1305 videobuf_queue_init(&fh
->vb_vidq
, &vivi_video_qops
,
1308 V4L2_FIELD_INTERLACED
,
1309 sizeof(struct vivi_buffer
),fh
);
1315 vivi_read(struct file
*file
, char __user
*data
, size_t count
, loff_t
*ppos
)
1317 struct vivi_fh
*fh
= file
->private_data
;
1319 if (fh
->type
==V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1320 if (res_locked(fh
->dev
))
1322 return videobuf_read_one(&fh
->vb_vidq
, data
, count
, ppos
,
1323 file
->f_flags
& O_NONBLOCK
);
1329 vivi_poll(struct file
*file
, struct poll_table_struct
*wait
)
1331 struct vivi_fh
*fh
= file
->private_data
;
1332 struct vivi_buffer
*buf
;
1334 dprintk(1,"%s\n",__FUNCTION__
);
1336 if (V4L2_BUF_TYPE_VIDEO_CAPTURE
!= fh
->type
)
1339 if (res_get(fh
->dev
,fh
)) {
1340 dprintk(1,"poll: mmap interface\n");
1341 /* streaming capture */
1342 if (list_empty(&fh
->vb_vidq
.stream
))
1344 buf
= list_entry(fh
->vb_vidq
.stream
.next
,struct vivi_buffer
,vb
.stream
);
1346 dprintk(1,"poll: read() interface\n");
1347 /* read() capture */
1348 buf
= (struct vivi_buffer
*)fh
->vb_vidq
.read_buf
;
1352 poll_wait(file
, &buf
->vb
.done
, wait
);
1353 if (buf
->vb
.state
== STATE_DONE
||
1354 buf
->vb
.state
== STATE_ERROR
)
1355 return POLLIN
|POLLRDNORM
;
1359 static int vivi_release(struct inode
*inode
, struct file
*file
)
1361 struct vivi_fh
*fh
= file
->private_data
;
1362 struct vivi_dev
*dev
= fh
->dev
;
1363 struct vivi_dmaqueue
*vidq
= &dev
->vidq
;
1365 int minor
= iminor(inode
);
1367 vivi_stop_thread(vidq
);
1368 videobuf_mmap_free(&fh
->vb_vidq
);
1374 printk(KERN_DEBUG
"vivi: close called (minor=%d, users=%d)\n",minor
,dev
->users
);
1380 vivi_mmap(struct file
*file
, struct vm_area_struct
* vma
)
1382 struct vivi_fh
*fh
= file
->private_data
;
1385 dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma
);
1387 ret
=videobuf_mmap_mapper(&fh
->vb_vidq
, vma
);
1389 dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1390 (unsigned long)vma
->vm_start
,
1391 (unsigned long)vma
->vm_end
-(unsigned long)vma
->vm_start
,
1397 static struct file_operations vivi_fops
= {
1398 .owner
= THIS_MODULE
,
1400 .release
= vivi_release
,
1403 .ioctl
= vivi_ioctl
,
1405 .llseek
= no_llseek
,
1408 static struct video_device vivi
= {
1409 .name
= "VTM Virtual Video Capture Board",
1410 .type
= VID_TYPE_CAPTURE
,
1414 // .release = video_device_release,
1416 /* ------------------------------------------------------------------
1417 Initialization and module stuff
1418 ------------------------------------------------------------------*/
1420 static int __init
vivi_init(void)
1423 struct vivi_dev
*dev
;
1425 dev
= kzalloc(sizeof(*dev
),GFP_KERNEL
);
1428 list_add_tail(&dev
->vivi_devlist
,&vivi_devlist
);
1430 /* init video dma queues */
1431 INIT_LIST_HEAD(&dev
->vidq
.active
);
1432 INIT_LIST_HEAD(&dev
->vidq
.queued
);
1434 /* initialize locks */
1435 init_MUTEX(&dev
->lock
);
1437 dev
->vidq
.timeout
.function
= vivi_vid_timeout
;
1438 dev
->vidq
.timeout
.data
= (unsigned long)dev
;
1439 init_timer(&dev
->vidq
.timeout
);
1441 ret
= video_register_device(&vivi
, VFL_TYPE_GRABBER
, video_nr
);
1442 printk(KERN_INFO
"Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret
);
1446 static void __exit
vivi_exit(void)
1449 struct list_head
*list
;
1451 list_for_each(list
,&vivi_devlist
) {
1452 h
= list_entry(list
, struct vivi_dev
, vivi_devlist
);
1455 video_unregister_device(&vivi
);
1458 module_init(vivi_init
);
1459 module_exit(vivi_exit
);