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/interrupt.h>
30 #include <media/video-buf.h>
31 #include <media/v4l2-common.h>
32 #include <linux/kthread.h>
33 #include <linux/highmem.h>
35 /* Wake up at about 30 fps */
36 #define WAKE_NUMERATOR 30
37 #define WAKE_DENOMINATOR 1001
38 #define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
40 /* These timers are for 1 fps - used only for testing */
41 //#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
42 //#define BUFFER_TIMEOUT msecs_to_jiffies(5000) /* 5 seconds */
47 #define kzalloc(size, flags) \
49 void *__ret = kmalloc(size, flags); \
51 memset(__ret, 0, size); \
56 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
57 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
58 MODULE_LICENSE("Dual BSD/GPL");
60 #define VIVI_MAJOR_VERSION 0
61 #define VIVI_MINOR_VERSION 4
62 #define VIVI_RELEASE 0
63 #define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
65 static int video_nr
= -1; /* /dev/videoN, -1 for autodetect */
66 module_param(video_nr
, int, 0);
69 module_param(debug
, int, 0);
71 static unsigned int vid_limit
= 16;
72 module_param(vid_limit
,int,0644);
73 MODULE_PARM_DESC(vid_limit
,"capture memory limit in megabytes");
75 /* supported controls */
76 static struct v4l2_queryctrl vivi_qctrl
[] = {
78 .id
= V4L2_CID_AUDIO_VOLUME
,
83 .default_value
= 65535,
85 .type
= V4L2_CTRL_TYPE_INTEGER
,
87 .id
= V4L2_CID_BRIGHTNESS
,
88 .type
= V4L2_CTRL_TYPE_INTEGER
,
96 .id
= V4L2_CID_CONTRAST
,
97 .type
= V4L2_CTRL_TYPE_INTEGER
,
102 .default_value
= 0x10,
105 .id
= V4L2_CID_SATURATION
,
106 .type
= V4L2_CTRL_TYPE_INTEGER
,
107 .name
= "Saturation",
111 .default_value
= 127,
115 .type
= V4L2_CTRL_TYPE_INTEGER
,
125 static int qctl_regs
[ARRAY_SIZE(vivi_qctrl
)];
127 #define dprintk(level,fmt, arg...) \
129 if (debug >= (level)) \
130 printk(KERN_DEBUG "vivi: " fmt , ## arg); \
133 /* ------------------------------------------------------------------
135 ------------------------------------------------------------------*/
139 u32 fourcc
; /* v4l2 format id */
143 static struct vivi_fmt format
= {
144 .name
= "4:2:2, packed, YUYV",
145 .fourcc
= V4L2_PIX_FMT_YUYV
,
151 struct scatterlist
*sg
;
154 /* buffer for one video frame */
156 /* common v4l buffer stuff -- must be first */
157 struct videobuf_buffer vb
;
159 struct vivi_fmt
*fmt
;
161 struct sg_to_addr
*to_addr
;
164 struct vivi_dmaqueue
{
165 struct list_head active
;
166 struct list_head queued
;
167 struct timer_list timeout
;
169 /* thread for generating video stream*/
170 struct task_struct
*kthread
;
171 wait_queue_head_t wq
;
172 /* Counters to control fps rate */
177 static LIST_HEAD(vivi_devlist
);
180 struct list_head vivi_devlist
;
182 struct semaphore lock
;
186 /* various device info */
187 unsigned int resources
;
188 struct video_device video_dev
;
190 struct vivi_dmaqueue vidq
;
192 /* Several counters */
193 int h
,m
,s
,us
,jiffies
;
198 struct vivi_dev
*dev
;
201 struct vivi_fmt
*fmt
;
202 unsigned int width
,height
;
203 struct videobuf_queue vb_vidq
;
205 enum v4l2_buf_type type
;
208 /* ------------------------------------------------------------------
209 DMA and thread functions
210 ------------------------------------------------------------------*/
212 /* Bars and Colors should match positions */
224 static u8 bars
[8][3] = {
226 {204,204,204}, /* white */
227 {208,208, 0}, /* ambar */
228 { 0,206,206}, /* cyan */
229 { 0,239, 0}, /* green */
230 {239, 0,239}, /* magenta */
231 {205, 0, 0}, /* red */
232 { 0, 0,255}, /* blue */
236 #define TO_Y(r,g,b) (((16829*r +33039*g +6416*b + 32768)>>16)+16)
237 /* RGB to V(Cr) Color transform */
238 #define TO_V(r,g,b) (((28784*r -24103*g -4681*b + 32768)>>16)+128)
239 /* RGB to U(Cb) Color transform */
240 #define TO_U(r,g,b) (((-9714*r -19070*g +28784*b + 32768)>>16)+128)
242 #define TSTAMP_MIN_Y 24
243 #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
244 #define TSTAMP_MIN_X 64
246 void prep_to_addr(struct sg_to_addr to_addr
[],struct videobuf_buffer
*vb
)
250 for (i
=0;i
<vb
->dma
.nr_pages
;i
++) {
251 to_addr
[i
].sg
=&vb
->dma
.sglist
[i
];
253 pos
+= vb
->dma
.sglist
[i
].length
;
257 inline int get_addr_pos(int pos
, int pages
, struct sg_to_addr to_addr
[])
259 int p1
=0,p2
=pages
-1,p3
=pages
/2;
262 BUG_ON (pos
>=to_addr
[p2
].pos
+to_addr
[p2
].sg
->length
);
265 if (pos
< to_addr
[p3
].pos
) {
272 if (pos
>= to_addr
[p2
].pos
)
278 void gen_line(struct sg_to_addr to_addr
[],int inipos
,int pages
,int wmax
,
279 int hmax
, int line
, char *timestr
)
281 int w
,i
,j
,pos
=inipos
,pgpos
,oldpg
,y
;
286 /* Get first addr pointed to pixel position */
287 oldpg
=get_addr_pos(pos
,pages
,to_addr
);
288 pg
=pfn_to_page(to_addr
[oldpg
].sg
->dma_address
>> PAGE_SHIFT
);
289 basep
= kmap_atomic(pg
, KM_BOUNCE_READ
)+to_addr
[oldpg
].sg
->offset
;
291 /* We will just duplicate the second pixel at the packet */
294 /* Generate a standard color bar pattern */
295 for (w
=0;w
<wmax
;w
++) {
300 for (color
=0;color
<4;color
++) {
301 pgpos
=get_addr_pos(pos
,pages
,to_addr
);
303 pg
=pfn_to_page(to_addr
[pgpos
].sg
->dma_address
>> PAGE_SHIFT
);
304 kunmap_atomic(basep
, KM_BOUNCE_READ
);
305 basep
= kmap_atomic(pg
, KM_BOUNCE_READ
)+to_addr
[pgpos
].sg
->offset
;
308 p
=basep
+pos
-to_addr
[pgpos
].pos
;
313 *p
=TO_Y(r
,g
,b
); /* Luminance */
316 *p
=TO_U(r
,g
,b
); /* Cb */
319 *p
=TO_V(r
,g
,b
); /* Cr */
326 /* Checks if it is possible to show timestamp */
327 if (TSTAMP_MAX_Y
>=hmax
)
329 if (TSTAMP_MIN_X
+strlen(timestr
)>=wmax
)
332 /* Print stream time */
333 if (line
>=TSTAMP_MIN_Y
&& line
<=TSTAMP_MAX_Y
) {
335 for (s
=timestr
;*s
;s
++) {
336 chr
=rom8x16_bits
[(*s
-0x30)*16+line
-TSTAMP_MIN_Y
];
338 if (chr
&1<<(7-i
)) { /* Font color*/
344 } else { /* Background color */
352 for (color
=0;color
<4;color
++) {
353 pgpos
=get_addr_pos(pos
,pages
,to_addr
);
355 pg
=pfn_to_page(to_addr
[pgpos
].
360 basep
= kmap_atomic(pg
,
362 to_addr
[pgpos
].sg
->offset
;
365 p
=basep
+pos
-to_addr
[pgpos
].pos
;
372 *p
=TO_Y(r
,g
,b
); /* Luminance */
375 *p
=TO_U(r
,g
,b
); /* Cb */
378 *p
=TO_V(r
,g
,b
); /* Cr */
390 kunmap_atomic(basep
, KM_BOUNCE_READ
);
392 static void vivi_fillbuff(struct vivi_dev
*dev
,struct vivi_buffer
*buf
)
395 int hmax
= buf
->vb
.height
;
396 int wmax
= buf
->vb
.width
;
397 struct videobuf_buffer
*vb
=&buf
->vb
;
398 struct sg_to_addr
*to_addr
=buf
->to_addr
;
401 /* Test if DMA mapping is ready */
402 if (!vb
->dma
.sglist
[0].dma_address
)
405 prep_to_addr(to_addr
,vb
);
407 /* Check if there is enough memory */
408 BUG_ON(buf
->vb
.dma
.nr_pages
<< PAGE_SHIFT
< (buf
->vb
.width
*buf
->vb
.height
)*2);
410 for (h
=0;h
<hmax
;h
++) {
411 gen_line(to_addr
,pos
,vb
->dma
.nr_pages
,wmax
,hmax
,h
,dev
->timestr
);
415 /* Updates stream time */
417 dev
->us
+=jiffies_to_usecs(jiffies
-dev
->jiffies
);
418 dev
->jiffies
=jiffies
;
419 if (dev
->us
>=1000000) {
433 sprintf(dev
->timestr
,"%02d:%02d:%02d:%03d",
434 dev
->h
,dev
->m
,dev
->s
,(dev
->us
+500)/1000);
436 dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev
->timestr
,
437 (unsigned long)buf
->vb
.dma
.vmalloc
,pos
);
439 /* Advice that buffer was filled */
440 buf
->vb
.state
= STATE_DONE
;
441 buf
->vb
.field_count
++;
442 do_gettimeofday(&ts
);
445 list_del(&buf
->vb
.queue
);
446 wake_up(&buf
->vb
.done
);
449 static int restart_video_queue(struct vivi_dmaqueue
*dma_q
);
451 static void vivi_thread_tick(struct vivi_dmaqueue
*dma_q
)
453 struct vivi_buffer
*buf
;
454 struct vivi_dev
*dev
= container_of(dma_q
,struct vivi_dev
,vidq
);
458 /* Announces videobuf that all went ok */
459 for (bc
= 0;; bc
++) {
460 if (list_empty(&dma_q
->active
)) {
461 dprintk(1,"No active queue to serve\n");
465 buf
= list_entry(dma_q
->active
.next
,
466 struct vivi_buffer
, vb
.queue
);
468 /* Nobody is waiting something to be done, just return */
469 if (!waitqueue_active(&buf
->vb
.done
)) {
470 mod_timer(&dma_q
->timeout
, jiffies
+BUFFER_TIMEOUT
);
474 do_gettimeofday(&buf
->vb
.ts
);
475 dprintk(2,"[%p/%d] wakeup\n",buf
,buf
->vb
.i
);
478 vivi_fillbuff(dev
,buf
);
480 if (list_empty(&dma_q
->active
)) {
481 del_timer(&dma_q
->timeout
);
483 mod_timer(&dma_q
->timeout
, jiffies
+BUFFER_TIMEOUT
);
486 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__
,bc
);
489 void vivi_sleep(struct vivi_dmaqueue
*dma_q
)
492 DECLARE_WAITQUEUE(wait
, current
);
494 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__
,(unsigned long)dma_q
);
496 add_wait_queue(&dma_q
->wq
, &wait
);
497 if (!kthread_should_stop()) {
500 /* Calculate time to wake up */
501 timeout
=dma_q
->ini_jiffies
+msecs_to_jiffies((dma_q
->frame
*WAKE_NUMERATOR
*1000)/WAKE_DENOMINATOR
)-jiffies
;
504 int old
=dma_q
->frame
;
505 dma_q
->frame
=(jiffies_to_msecs(jiffies
-dma_q
->ini_jiffies
)*WAKE_DENOMINATOR
)/(WAKE_NUMERATOR
*1000)+1;
507 timeout
=dma_q
->ini_jiffies
+msecs_to_jiffies((dma_q
->frame
*WAKE_NUMERATOR
*1000)/WAKE_DENOMINATOR
)-jiffies
;
509 dprintk(1,"underrun, losed %d frames. "
510 "Now, frame is %d. Waking on %d jiffies\n",
511 dma_q
->frame
-old
,dma_q
->frame
,timeout
);
513 dprintk(1,"will sleep for %i jiffies\n",timeout
);
515 vivi_thread_tick(dma_q
);
517 schedule_timeout_interruptible (timeout
);
520 remove_wait_queue(&dma_q
->wq
, &wait
);
524 int vivi_thread(void *data
)
526 struct vivi_dmaqueue
*dma_q
=data
;
528 dprintk(1,"thread started\n");
533 if (kthread_should_stop())
536 dprintk(1, "thread: exit\n");
540 int vivi_start_thread(struct vivi_dmaqueue
*dma_q
)
543 dma_q
->ini_jiffies
=jiffies
;
545 dprintk(1,"%s\n",__FUNCTION__
);
546 init_waitqueue_head(&dma_q
->wq
);
548 dma_q
->kthread
= kthread_run(vivi_thread
, dma_q
, "vivi");
550 if (dma_q
->kthread
== NULL
) {
551 printk(KERN_ERR
"vivi: kernel_thread() failed\n");
554 dprintk(1,"returning from %s\n",__FUNCTION__
);
558 void vivi_stop_thread(struct vivi_dmaqueue
*dma_q
)
560 dprintk(1,"%s\n",__FUNCTION__
);
561 /* shutdown control thread */
562 if (dma_q
->kthread
) {
563 kthread_stop(dma_q
->kthread
);
568 static int restart_video_queue(struct vivi_dmaqueue
*dma_q
)
570 struct vivi_buffer
*buf
, *prev
;
571 struct list_head
*item
;
573 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__
,(unsigned long)dma_q
);
575 if (!list_empty(&dma_q
->active
)) {
576 buf
= list_entry(dma_q
->active
.next
, struct vivi_buffer
, vb
.queue
);
577 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
580 dprintk(1,"Restarting video dma\n");
581 vivi_stop_thread(dma_q
);
582 // vivi_start_thread(dma_q);
584 /* cancel all outstanding capture / vbi requests */
585 list_for_each(item
,&dma_q
->active
) {
586 buf
= list_entry(item
, struct vivi_buffer
, vb
.queue
);
588 list_del(&buf
->vb
.queue
);
589 buf
->vb
.state
= STATE_ERROR
;
590 wake_up(&buf
->vb
.done
);
592 mod_timer(&dma_q
->timeout
, jiffies
+BUFFER_TIMEOUT
);
599 if (list_empty(&dma_q
->queued
))
601 buf
= list_entry(dma_q
->queued
.next
, struct vivi_buffer
, vb
.queue
);
603 list_del(&buf
->vb
.queue
);
604 list_add_tail(&buf
->vb
.queue
,&dma_q
->active
);
606 dprintk(1,"Restarting video dma\n");
607 vivi_stop_thread(dma_q
);
608 vivi_start_thread(dma_q
);
610 buf
->vb
.state
= STATE_ACTIVE
;
611 mod_timer(&dma_q
->timeout
, jiffies
+BUFFER_TIMEOUT
);
612 dprintk(2,"[%p/%d] restart_queue - first active\n",
615 } else if (prev
->vb
.width
== buf
->vb
.width
&&
616 prev
->vb
.height
== buf
->vb
.height
&&
617 prev
->fmt
== buf
->fmt
) {
618 list_del(&buf
->vb
.queue
);
619 list_add_tail(&buf
->vb
.queue
,&dma_q
->active
);
620 buf
->vb
.state
= STATE_ACTIVE
;
621 dprintk(2,"[%p/%d] restart_queue - move to active\n",
630 static void vivi_vid_timeout(unsigned long data
)
632 struct vivi_dev
*dev
= (struct vivi_dev
*)data
;
633 struct vivi_dmaqueue
*vidq
= &dev
->vidq
;
634 struct vivi_buffer
*buf
;
636 while (!list_empty(&vidq
->active
)) {
637 buf
= list_entry(vidq
->active
.next
, struct vivi_buffer
, vb
.queue
);
638 list_del(&buf
->vb
.queue
);
639 buf
->vb
.state
= STATE_ERROR
;
640 wake_up(&buf
->vb
.done
);
641 printk("vivi/0: [%p/%d] timeout\n", buf
, buf
->vb
.i
);
644 restart_video_queue(vidq
);
647 /* ------------------------------------------------------------------
649 ------------------------------------------------------------------*/
651 buffer_setup(struct videobuf_queue
*vq
, unsigned int *count
, unsigned int *size
)
653 struct vivi_fh
*fh
= vq
->priv_data
;
655 *size
= fh
->width
*fh
->height
*2;
659 while (*size
* *count
> vid_limit
* 1024 * 1024)
665 free_buffer(struct videobuf_queue
*vq
, struct vivi_buffer
*buf
)
667 dprintk(1,"%s\n",__FUNCTION__
);
672 /*FIXME: Maybe a spinlock is required here */
676 videobuf_waiton(&buf
->vb
,0,0);
677 videobuf_dma_unmap(vq
, &buf
->vb
.dma
);
678 videobuf_dma_free(&buf
->vb
.dma
);
679 buf
->vb
.state
= STATE_NEEDS_INIT
;
682 #define norm_maxw() 1024
683 #define norm_maxh() 768
685 buffer_prepare(struct videobuf_queue
*vq
, struct videobuf_buffer
*vb
,
686 enum v4l2_field field
)
688 struct vivi_fh
*fh
= vq
->priv_data
;
689 struct vivi_buffer
*buf
= container_of(vb
,struct vivi_buffer
,vb
);
690 int rc
, init_buffer
= 0;
692 // dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
694 BUG_ON(NULL
== fh
->fmt
);
695 if (fh
->width
< 48 || fh
->width
> norm_maxw() ||
696 fh
->height
< 32 || fh
->height
> norm_maxh())
698 buf
->vb
.size
= fh
->width
*fh
->height
*2;
699 if (0 != buf
->vb
.baddr
&& buf
->vb
.bsize
< buf
->vb
.size
)
702 if (buf
->fmt
!= fh
->fmt
||
703 buf
->vb
.width
!= fh
->width
||
704 buf
->vb
.height
!= fh
->height
||
705 buf
->vb
.field
!= field
) {
707 buf
->vb
.width
= fh
->width
;
708 buf
->vb
.height
= fh
->height
;
709 buf
->vb
.field
= field
;
713 if (STATE_NEEDS_INIT
== buf
->vb
.state
) {
714 if (0 != (rc
= videobuf_iolock(vq
,&buf
->vb
,NULL
)))
718 buf
->vb
.state
= STATE_PREPARED
;
720 if (NULL
== (buf
->to_addr
= kmalloc(sizeof(*buf
->to_addr
) * vb
->dma
.nr_pages
,GFP_KERNEL
))) {
733 buffer_queue(struct videobuf_queue
*vq
, struct videobuf_buffer
*vb
)
735 struct vivi_buffer
*buf
= container_of(vb
,struct vivi_buffer
,vb
);
736 struct vivi_fh
*fh
= vq
->priv_data
;
737 struct vivi_dev
*dev
= fh
->dev
;
738 struct vivi_dmaqueue
*vidq
= &dev
->vidq
;
739 struct vivi_buffer
*prev
;
741 if (!list_empty(&vidq
->queued
)) {
742 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf
->vb
.queue
);
743 list_add_tail(&buf
->vb
.queue
,&vidq
->queued
);
744 buf
->vb
.state
= STATE_QUEUED
;
745 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
747 } else if (list_empty(&vidq
->active
)) {
748 list_add_tail(&buf
->vb
.queue
,&vidq
->active
);
750 buf
->vb
.state
= STATE_ACTIVE
;
751 mod_timer(&vidq
->timeout
, jiffies
+BUFFER_TIMEOUT
);
752 dprintk(2,"[%p/%d] buffer_queue - first active\n",
755 vivi_start_thread(vidq
);
757 prev
= list_entry(vidq
->active
.prev
, struct vivi_buffer
, vb
.queue
);
758 if (prev
->vb
.width
== buf
->vb
.width
&&
759 prev
->vb
.height
== buf
->vb
.height
&&
760 prev
->fmt
== buf
->fmt
) {
761 list_add_tail(&buf
->vb
.queue
,&vidq
->active
);
762 buf
->vb
.state
= STATE_ACTIVE
;
763 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
767 list_add_tail(&buf
->vb
.queue
,&vidq
->queued
);
768 buf
->vb
.state
= STATE_QUEUED
;
769 dprintk(2,"[%p/%d] buffer_queue - first queued\n",
775 static void buffer_release(struct videobuf_queue
*vq
, struct videobuf_buffer
*vb
)
777 struct vivi_buffer
*buf
= container_of(vb
,struct vivi_buffer
,vb
);
778 struct vivi_fh
*fh
= vq
->priv_data
;
779 struct vivi_dev
*dev
= (struct vivi_dev
*)fh
->dev
;
780 struct vivi_dmaqueue
*vidq
= &dev
->vidq
;
782 dprintk(1,"%s\n",__FUNCTION__
);
784 vivi_stop_thread(vidq
);
789 int vivi_map_sg (void *dev
, struct scatterlist
*sg
, int nents
,
794 dprintk(1,"%s, number of pages=%d\n",__FUNCTION__
,nents
);
795 BUG_ON(direction
== DMA_NONE
);
797 for (i
= 0; i
< nents
; i
++ ) {
800 sg
[i
].dma_address
= page_to_phys(sg
[i
].page
) + sg
[i
].offset
;
806 int vivi_unmap_sg(void *dev
,struct scatterlist
*sglist
,int nr_pages
,
809 dprintk(1,"%s\n",__FUNCTION__
);
813 int vivi_dma_sync_sg(void *dev
,struct scatterlist
*sglist
,int nr_pages
,
816 // dprintk(1,"%s\n",__FUNCTION__);
818 // flush_write_buffers();
822 static struct videobuf_queue_ops vivi_video_qops
= {
823 .buf_setup
= buffer_setup
,
824 .buf_prepare
= buffer_prepare
,
825 .buf_queue
= buffer_queue
,
826 .buf_release
= buffer_release
,
828 /* Non-pci handling routines */
829 .vb_map_sg
= vivi_map_sg
,
830 .vb_dma_sync_sg
= vivi_dma_sync_sg
,
831 .vb_unmap_sg
= vivi_unmap_sg
,
834 /* ------------------------------------------------------------------
836 ------------------------------------------------------------------*/
838 static int vivi_try_fmt(struct vivi_dev
*dev
, struct vivi_fh
*fh
,
839 struct v4l2_format
*f
)
841 struct vivi_fmt
*fmt
;
842 enum v4l2_field field
;
843 unsigned int maxw
, maxh
;
845 if (format
.fourcc
!= f
->fmt
.pix
.pixelformat
) {
846 dprintk(1,"Fourcc format invalid.\n");
851 field
= f
->fmt
.pix
.field
;
853 if (field
== V4L2_FIELD_ANY
) {
854 // field=V4L2_FIELD_INTERLACED;
855 field
=V4L2_FIELD_SEQ_TB
;
856 } else if (V4L2_FIELD_INTERLACED
!= field
) {
857 dprintk(1,"Field type invalid.\n");
864 f
->fmt
.pix
.field
= field
;
865 if (f
->fmt
.pix
.height
< 32)
866 f
->fmt
.pix
.height
= 32;
867 if (f
->fmt
.pix
.height
> maxh
)
868 f
->fmt
.pix
.height
= maxh
;
869 if (f
->fmt
.pix
.width
< 48)
870 f
->fmt
.pix
.width
= 48;
871 if (f
->fmt
.pix
.width
> maxw
)
872 f
->fmt
.pix
.width
= maxw
;
873 f
->fmt
.pix
.width
&= ~0x03;
874 f
->fmt
.pix
.bytesperline
=
875 (f
->fmt
.pix
.width
* fmt
->depth
) >> 3;
876 f
->fmt
.pix
.sizeimage
=
877 f
->fmt
.pix
.height
* f
->fmt
.pix
.bytesperline
;
882 static int res_get(struct vivi_dev
*dev
, struct vivi_fh
*fh
)
886 if (dev
->resources
) {
887 /* no, someone else uses it */
891 /* it's free, grab it */
893 dprintk(1,"res: get\n");
898 static inline int res_locked(struct vivi_dev
*dev
)
900 return (dev
->resources
);
903 static void res_free(struct vivi_dev
*dev
, struct vivi_fh
*fh
)
907 dprintk(1,"res: put\n");
911 static int vivi_do_ioctl(struct inode
*inode
, struct file
*file
, unsigned int cmd
, void *arg
)
913 struct vivi_fh
*fh
= file
->private_data
;
914 struct vivi_dev
*dev
= fh
->dev
;
918 if (_IOC_DIR(cmd
) & _IOC_WRITE
)
919 v4l_printk_ioctl_arg("vivi(w)",cmd
, arg
);
920 else if (!_IOC_DIR(cmd
) & _IOC_READ
) {
921 v4l_print_ioctl("vivi", cmd
);
926 /* --- capabilities ------------------------------------------ */
927 case VIDIOC_QUERYCAP
:
929 struct v4l2_capability
*cap
= (struct v4l2_capability
*)arg
;
931 memset(cap
, 0, sizeof(*cap
));
933 strcpy(cap
->driver
, "vivi");
934 strcpy(cap
->card
, "vivi");
935 cap
->version
= VIVI_VERSION
;
937 V4L2_CAP_VIDEO_CAPTURE
|
942 /* --- capture ioctls ---------------------------------------- */
943 case VIDIOC_ENUM_FMT
:
945 struct v4l2_fmtdesc
*f
= arg
;
946 enum v4l2_buf_type type
;
952 if (f
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
958 case V4L2_BUF_TYPE_VIDEO_CAPTURE
:
963 memset(f
,0,sizeof(*f
));
967 strlcpy(f
->description
,format
.name
,sizeof(f
->description
));
968 f
->pixelformat
= format
.fourcc
;
977 struct v4l2_format
*f
= (struct v4l2_format
*)arg
;
979 if (f
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
984 memset(&f
->fmt
.pix
,0,sizeof(f
->fmt
.pix
));
985 f
->fmt
.pix
.width
= fh
->width
;
986 f
->fmt
.pix
.height
= fh
->height
;
987 f
->fmt
.pix
.field
= fh
->vb_vidq
.field
;
988 f
->fmt
.pix
.pixelformat
= fh
->fmt
->fourcc
;
989 f
->fmt
.pix
.bytesperline
=
990 (f
->fmt
.pix
.width
* fh
->fmt
->depth
) >> 3;
991 f
->fmt
.pix
.sizeimage
=
992 f
->fmt
.pix
.height
* f
->fmt
.pix
.bytesperline
;
997 struct v4l2_format
*f
= arg
;
999 if (f
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1000 dprintk(1,"Only capture supported.\n");
1005 ret
= vivi_try_fmt(dev
,fh
,f
);
1010 fh
->width
= f
->fmt
.pix
.width
;
1011 fh
->height
= f
->fmt
.pix
.height
;
1012 fh
->vb_vidq
.field
= f
->fmt
.pix
.field
;
1017 case VIDIOC_TRY_FMT
:
1019 struct v4l2_format
*f
= arg
;
1020 if (f
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1025 ret
=vivi_try_fmt(dev
,fh
,f
);
1028 case VIDIOC_REQBUFS
:
1029 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1033 ret
=videobuf_reqbufs(&fh
->vb_vidq
, arg
);
1035 case VIDIOC_QUERYBUF
:
1036 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1040 ret
=videobuf_querybuf(&fh
->vb_vidq
, arg
);
1043 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1047 ret
=videobuf_qbuf(&fh
->vb_vidq
, arg
);
1050 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1054 ret
=videobuf_dqbuf(&fh
->vb_vidq
, arg
,
1055 file
->f_flags
& O_NONBLOCK
);
1058 /* --- streaming capture ------------------------------------- */
1061 struct video_mbuf
*mbuf
= arg
;
1062 struct videobuf_queue
*q
=&fh
->vb_vidq
;
1063 struct v4l2_requestbuffers req
;
1066 memset(&req
,0,sizeof(req
));
1069 req
.memory
= V4L2_MEMORY_MMAP
;
1070 ret
= videobuf_reqbufs(q
,&req
);
1073 memset(mbuf
,0,sizeof(*mbuf
));
1074 mbuf
->frames
= req
.count
;
1076 for (i
= 0; i
< mbuf
->frames
; i
++) {
1077 mbuf
->offsets
[i
] = q
->bufs
[i
]->boff
;
1078 mbuf
->size
+= q
->bufs
[i
]->bsize
;
1083 case VIDIOC_STREAMON
:
1085 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1087 if (!res_get(dev
,fh
))
1089 ret
=videobuf_streamon(&fh
->vb_vidq
);
1092 case VIDIOC_STREAMOFF
:
1094 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1098 ret
= videobuf_streamoff(&fh
->vb_vidq
);
1104 /* ---------- tv norms ---------- */
1105 case VIDIOC_ENUMSTD
:
1107 struct v4l2_standard
*e
= arg
;
1113 ret
= v4l2_video_std_construct(e
, V4L2_STD_NTSC_M
, "NTSC-M");
1115 /* Allows vivi to use different fps from video std */
1116 e
->frameperiod
.numerator
= WAKE_NUMERATOR
;
1117 e
->frameperiod
.denominator
= WAKE_DENOMINATOR
;
1123 v4l2_std_id
*id
= arg
;
1125 *id
= V4L2_STD_NTSC_M
;
1132 /* ------ input switching ---------- */
1133 case VIDIOC_ENUMINPUT
:
1134 { /* only one input in this sample driver */
1135 struct v4l2_input
*inp
= arg
;
1137 if (inp
->index
!= 0) {
1141 memset(inp
, 0, sizeof(*inp
));
1144 inp
->type
= V4L2_INPUT_TYPE_CAMERA
;
1145 inp
->std
= V4L2_STD_NTSC_M
;
1146 strcpy(inp
->name
,"Camera");
1149 case VIDIOC_G_INPUT
:
1151 unsigned int *i
= arg
;
1156 case VIDIOC_S_INPUT
:
1158 unsigned int *i
= arg
;
1165 /* --- controls ---------------------------------------------- */
1166 case VIDIOC_QUERYCTRL
:
1168 struct v4l2_queryctrl
*qc
= arg
;
1171 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
1172 if (qc
->id
&& qc
->id
== vivi_qctrl
[i
].id
) {
1173 memcpy(qc
, &(vivi_qctrl
[i
]),
1183 struct v4l2_control
*ctrl
= arg
;
1186 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
1187 if (ctrl
->id
== vivi_qctrl
[i
].id
) {
1188 ctrl
->value
=qctl_regs
[i
];
1197 struct v4l2_control
*ctrl
= arg
;
1199 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
1200 if (ctrl
->id
== vivi_qctrl
[i
].id
) {
1202 vivi_qctrl
[i
].minimum
1204 vivi_qctrl
[i
].maximum
) {
1208 qctl_regs
[i
]=ctrl
->value
;
1215 ret
=v4l_compat_translate_ioctl(inode
,file
,cmd
,arg
,vivi_do_ioctl
);
1220 v4l_print_ioctl("vivi(err)", cmd
);
1221 dprintk(1,"errcode=%d\n",ret
);
1222 } else if (_IOC_DIR(cmd
) & _IOC_READ
)
1223 v4l_printk_ioctl_arg("vivi(r)",cmd
, arg
);
1229 static int vivi_ioctl(struct inode
*inode
, struct file
*file
, unsigned int cmd
, unsigned long arg
)
1231 return video_usercopy(inode
, file
, cmd
, arg
, vivi_do_ioctl
);
1234 /* ------------------------------------------------------------------
1235 File operations for the device
1236 ------------------------------------------------------------------*/
1238 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1240 static int vivi_open(struct inode
*inode
, struct file
*file
)
1242 int minor
= iminor(inode
);
1243 struct vivi_dev
*h
,*dev
= NULL
;
1245 struct list_head
*list
;
1246 enum v4l2_buf_type type
= 0;
1249 printk(KERN_DEBUG
"vivi: open called (minor=%d)\n",minor
);
1251 list_for_each(list
,&vivi_devlist
) {
1252 h
= list_entry(list
, struct vivi_dev
, vivi_devlist
);
1253 if (h
->video_dev
.minor
== minor
) {
1255 type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1262 /* If more than one user, mutex should be added */
1265 dprintk(1,"open minor=%d type=%s users=%d\n",
1266 minor
,v4l2_type_names
[type
],dev
->users
);
1268 /* allocate + initialize per filehandle data */
1269 fh
= kzalloc(sizeof(*fh
),GFP_KERNEL
);
1275 file
->private_data
= fh
;
1277 fh
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1282 /* Put all controls at a sane state */
1283 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
1284 qctl_regs
[i
] =vivi_qctrl
[i
].default_value
;
1286 dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1287 (unsigned long)fh
,(unsigned long)dev
,(unsigned long)&dev
->vidq
);
1288 dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev
->vidq
.queued
));
1289 dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev
->vidq
.active
));
1291 /* Resets frame counters */
1296 dev
->jiffies
=jiffies
;
1297 sprintf(dev
->timestr
,"%02d:%02d:%02d:%03d",
1298 dev
->h
,dev
->m
,dev
->s
,(dev
->us
+500)/1000);
1300 videobuf_queue_init(&fh
->vb_vidq
, &vivi_video_qops
,
1303 V4L2_FIELD_INTERLACED
,
1304 sizeof(struct vivi_buffer
),fh
);
1310 vivi_read(struct file
*file
, char __user
*data
, size_t count
, loff_t
*ppos
)
1312 struct vivi_fh
*fh
= file
->private_data
;
1314 if (fh
->type
==V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1315 if (res_locked(fh
->dev
))
1317 return videobuf_read_one(&fh
->vb_vidq
, data
, count
, ppos
,
1318 file
->f_flags
& O_NONBLOCK
);
1324 vivi_poll(struct file
*file
, struct poll_table_struct
*wait
)
1326 struct vivi_fh
*fh
= file
->private_data
;
1327 struct vivi_buffer
*buf
;
1329 dprintk(1,"%s\n",__FUNCTION__
);
1331 if (V4L2_BUF_TYPE_VIDEO_CAPTURE
!= fh
->type
)
1334 if (res_get(fh
->dev
,fh
)) {
1335 dprintk(1,"poll: mmap interface\n");
1336 /* streaming capture */
1337 if (list_empty(&fh
->vb_vidq
.stream
))
1339 buf
= list_entry(fh
->vb_vidq
.stream
.next
,struct vivi_buffer
,vb
.stream
);
1341 dprintk(1,"poll: read() interface\n");
1342 /* read() capture */
1343 buf
= (struct vivi_buffer
*)fh
->vb_vidq
.read_buf
;
1347 poll_wait(file
, &buf
->vb
.done
, wait
);
1348 if (buf
->vb
.state
== STATE_DONE
||
1349 buf
->vb
.state
== STATE_ERROR
)
1350 return POLLIN
|POLLRDNORM
;
1354 static int vivi_release(struct inode
*inode
, struct file
*file
)
1356 struct vivi_fh
*fh
= file
->private_data
;
1357 struct vivi_dev
*dev
= fh
->dev
;
1358 struct vivi_dmaqueue
*vidq
= &dev
->vidq
;
1360 int minor
= iminor(inode
);
1362 vivi_stop_thread(vidq
);
1363 videobuf_mmap_free(&fh
->vb_vidq
);
1369 printk(KERN_DEBUG
"vivi: close called (minor=%d, users=%d)\n",minor
,dev
->users
);
1375 vivi_mmap(struct file
*file
, struct vm_area_struct
* vma
)
1377 struct vivi_fh
*fh
= file
->private_data
;
1380 dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma
);
1382 ret
=videobuf_mmap_mapper(&fh
->vb_vidq
, vma
);
1384 dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1385 (unsigned long)vma
->vm_start
,
1386 (unsigned long)vma
->vm_end
-(unsigned long)vma
->vm_start
,
1392 static struct file_operations vivi_fops
= {
1393 .owner
= THIS_MODULE
,
1395 .release
= vivi_release
,
1398 .ioctl
= vivi_ioctl
,
1400 .llseek
= no_llseek
,
1403 static struct video_device vivi
= {
1404 .name
= "VTM Virtual Video Capture Board",
1405 .type
= VID_TYPE_CAPTURE
,
1409 // .release = video_device_release,
1411 /* ------------------------------------------------------------------
1412 Initialization and module stuff
1413 ------------------------------------------------------------------*/
1415 static int __init
vivi_init(void)
1418 struct vivi_dev
*dev
;
1420 dev
= kzalloc(sizeof(*dev
),GFP_KERNEL
);
1423 list_add_tail(&dev
->vivi_devlist
,&vivi_devlist
);
1425 /* init video dma queues */
1426 INIT_LIST_HEAD(&dev
->vidq
.active
);
1427 INIT_LIST_HEAD(&dev
->vidq
.queued
);
1429 /* initialize locks */
1430 init_MUTEX(&dev
->lock
);
1432 dev
->vidq
.timeout
.function
= vivi_vid_timeout
;
1433 dev
->vidq
.timeout
.data
= (unsigned long)dev
;
1434 init_timer(&dev
->vidq
.timeout
);
1436 ret
= video_register_device(&vivi
, VFL_TYPE_GRABBER
, video_nr
);
1437 printk(KERN_INFO
"Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret
);
1441 static void __exit
vivi_exit(void)
1444 struct list_head
*list
;
1446 list_for_each(list
,&vivi_devlist
) {
1447 h
= list_entry(list
, struct vivi_dev
, vivi_devlist
);
1450 video_unregister_device(&vivi
);
1453 module_init(vivi_init
);
1454 module_exit(vivi_exit
);