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>
39 #include <linux/freezer.h>
41 /* Wake up at about 30 fps */
42 #define WAKE_NUMERATOR 30
43 #define WAKE_DENOMINATOR 1001
44 #define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
46 /* These timers are for 1 fps - used only for testing */
47 //#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
48 //#define BUFFER_TIMEOUT msecs_to_jiffies(5000) /* 5 seconds */
52 #define VIVI_MAJOR_VERSION 0
53 #define VIVI_MINOR_VERSION 4
54 #define VIVI_RELEASE 0
55 #define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
57 /* Declare static vars that will be used as parameters */
58 static unsigned int vid_limit
= 16; /* Video memory limit, in Mb */
59 static struct video_device vivi
; /* Video device */
60 static int video_nr
= -1; /* /dev/videoN, -1 for autodetect */
62 /* supported controls */
63 static struct v4l2_queryctrl vivi_qctrl
[] = {
65 .id
= V4L2_CID_AUDIO_VOLUME
,
70 .default_value
= 65535,
72 .type
= V4L2_CTRL_TYPE_INTEGER
,
74 .id
= V4L2_CID_BRIGHTNESS
,
75 .type
= V4L2_CTRL_TYPE_INTEGER
,
83 .id
= V4L2_CID_CONTRAST
,
84 .type
= V4L2_CTRL_TYPE_INTEGER
,
89 .default_value
= 0x10,
92 .id
= V4L2_CID_SATURATION
,
93 .type
= V4L2_CTRL_TYPE_INTEGER
,
102 .type
= V4L2_CTRL_TYPE_INTEGER
,
112 static int qctl_regs
[ARRAY_SIZE(vivi_qctrl
)];
114 #define dprintk(level,fmt, arg...) \
116 if (vivi.debug >= (level)) \
117 printk(KERN_DEBUG "vivi: " fmt , ## arg); \
120 /* ------------------------------------------------------------------
122 ------------------------------------------------------------------*/
126 u32 fourcc
; /* v4l2 format id */
130 static struct vivi_fmt format
= {
131 .name
= "4:2:2, packed, YUYV",
132 .fourcc
= V4L2_PIX_FMT_YUYV
,
138 struct scatterlist
*sg
;
141 /* buffer for one video frame */
143 /* common v4l buffer stuff -- must be first */
144 struct videobuf_buffer vb
;
146 struct vivi_fmt
*fmt
;
148 struct sg_to_addr
*to_addr
;
151 struct vivi_dmaqueue
{
152 struct list_head active
;
153 struct list_head queued
;
154 struct timer_list timeout
;
156 /* thread for generating video stream*/
157 struct task_struct
*kthread
;
158 wait_queue_head_t wq
;
159 /* Counters to control fps rate */
164 static LIST_HEAD(vivi_devlist
);
167 struct list_head vivi_devlist
;
169 struct semaphore lock
;
173 /* various device info */
174 unsigned int resources
;
175 struct video_device vfd
;
177 struct vivi_dmaqueue vidq
;
179 /* Several counters */
180 int h
,m
,s
,us
,jiffies
;
185 struct vivi_dev
*dev
;
188 struct vivi_fmt
*fmt
;
189 unsigned int width
,height
;
190 struct videobuf_queue vb_vidq
;
192 enum v4l2_buf_type type
;
195 /* ------------------------------------------------------------------
196 DMA and thread functions
197 ------------------------------------------------------------------*/
199 /* Bars and Colors should match positions */
211 static u8 bars
[8][3] = {
213 {204,204,204}, /* white */
214 {208,208, 0}, /* ambar */
215 { 0,206,206}, /* cyan */
216 { 0,239, 0}, /* green */
217 {239, 0,239}, /* magenta */
218 {205, 0, 0}, /* red */
219 { 0, 0,255}, /* blue */
223 #define TO_Y(r,g,b) (((16829*r +33039*g +6416*b + 32768)>>16)+16)
224 /* RGB to V(Cr) Color transform */
225 #define TO_V(r,g,b) (((28784*r -24103*g -4681*b + 32768)>>16)+128)
226 /* RGB to U(Cb) Color transform */
227 #define TO_U(r,g,b) (((-9714*r -19070*g +28784*b + 32768)>>16)+128)
229 #define TSTAMP_MIN_Y 24
230 #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
231 #define TSTAMP_MIN_X 64
233 static void prep_to_addr(struct sg_to_addr to_addr
[],
234 struct videobuf_buffer
*vb
)
238 for (i
=0;i
<vb
->dma
.nr_pages
;i
++) {
239 to_addr
[i
].sg
=&vb
->dma
.sglist
[i
];
241 pos
+= vb
->dma
.sglist
[i
].length
;
245 static int get_addr_pos(int pos
, int pages
, struct sg_to_addr to_addr
[])
247 int p1
=0,p2
=pages
-1,p3
=pages
/2;
250 BUG_ON (pos
>=to_addr
[p2
].pos
+to_addr
[p2
].sg
->length
);
253 if (pos
< to_addr
[p3
].pos
) {
260 if (pos
>= to_addr
[p2
].pos
)
266 static void gen_line(struct sg_to_addr to_addr
[],int inipos
,int pages
,int wmax
,
267 int hmax
, int line
, char *timestr
)
269 int w
,i
,j
,pos
=inipos
,pgpos
,oldpg
,y
;
274 /* Get first addr pointed to pixel position */
275 oldpg
=get_addr_pos(pos
,pages
,to_addr
);
276 pg
=pfn_to_page(sg_dma_address(to_addr
[oldpg
].sg
) >> PAGE_SHIFT
);
277 basep
= kmap_atomic(pg
, KM_BOUNCE_READ
)+to_addr
[oldpg
].sg
->offset
;
279 /* We will just duplicate the second pixel at the packet */
282 /* Generate a standard color bar pattern */
283 for (w
=0;w
<wmax
;w
++) {
288 for (color
=0;color
<4;color
++) {
289 pgpos
=get_addr_pos(pos
,pages
,to_addr
);
291 pg
=pfn_to_page(sg_dma_address(to_addr
[pgpos
].sg
) >> PAGE_SHIFT
);
292 kunmap_atomic(basep
, KM_BOUNCE_READ
);
293 basep
= kmap_atomic(pg
, KM_BOUNCE_READ
)+to_addr
[pgpos
].sg
->offset
;
296 p
=basep
+pos
-to_addr
[pgpos
].pos
;
301 *p
=TO_Y(r
,g
,b
); /* Luminance */
304 *p
=TO_U(r
,g
,b
); /* Cb */
307 *p
=TO_V(r
,g
,b
); /* Cr */
314 /* Checks if it is possible to show timestamp */
315 if (TSTAMP_MAX_Y
>=hmax
)
317 if (TSTAMP_MIN_X
+strlen(timestr
)>=wmax
)
320 /* Print stream time */
321 if (line
>=TSTAMP_MIN_Y
&& line
<=TSTAMP_MAX_Y
) {
323 for (s
=timestr
;*s
;s
++) {
324 chr
=rom8x16_bits
[(*s
-0x30)*16+line
-TSTAMP_MIN_Y
];
326 if (chr
&1<<(7-i
)) { /* Font color*/
332 } else { /* Background color */
340 for (color
=0;color
<4;color
++) {
341 pgpos
=get_addr_pos(pos
,pages
,to_addr
);
343 pg
=pfn_to_page(sg_dma_address(
348 basep
= kmap_atomic(pg
,
350 to_addr
[pgpos
].sg
->offset
;
353 p
=basep
+pos
-to_addr
[pgpos
].pos
;
360 *p
=TO_Y(r
,g
,b
); /* Luminance */
363 *p
=TO_U(r
,g
,b
); /* Cb */
366 *p
=TO_V(r
,g
,b
); /* Cr */
378 kunmap_atomic(basep
, KM_BOUNCE_READ
);
380 static void vivi_fillbuff(struct vivi_dev
*dev
,struct vivi_buffer
*buf
)
383 int hmax
= buf
->vb
.height
;
384 int wmax
= buf
->vb
.width
;
385 struct videobuf_buffer
*vb
=&buf
->vb
;
386 struct sg_to_addr
*to_addr
=buf
->to_addr
;
389 /* Test if DMA mapping is ready */
390 if (!sg_dma_address(&vb
->dma
.sglist
[0]))
393 prep_to_addr(to_addr
,vb
);
395 /* Check if there is enough memory */
396 BUG_ON(buf
->vb
.dma
.nr_pages
<< PAGE_SHIFT
< (buf
->vb
.width
*buf
->vb
.height
)*2);
398 for (h
=0;h
<hmax
;h
++) {
399 gen_line(to_addr
,pos
,vb
->dma
.nr_pages
,wmax
,hmax
,h
,dev
->timestr
);
403 /* Updates stream time */
405 dev
->us
+=jiffies_to_usecs(jiffies
-dev
->jiffies
);
406 dev
->jiffies
=jiffies
;
407 if (dev
->us
>=1000000) {
421 sprintf(dev
->timestr
,"%02d:%02d:%02d:%03d",
422 dev
->h
,dev
->m
,dev
->s
,(dev
->us
+500)/1000);
424 dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev
->timestr
,
425 (unsigned long)buf
->vb
.dma
.vmalloc
,pos
);
427 /* Advice that buffer was filled */
428 buf
->vb
.state
= STATE_DONE
;
429 buf
->vb
.field_count
++;
430 do_gettimeofday(&ts
);
433 list_del(&buf
->vb
.queue
);
434 wake_up(&buf
->vb
.done
);
437 static int restart_video_queue(struct vivi_dmaqueue
*dma_q
);
439 static void vivi_thread_tick(struct vivi_dmaqueue
*dma_q
)
441 struct vivi_buffer
*buf
;
442 struct vivi_dev
*dev
= container_of(dma_q
,struct vivi_dev
,vidq
);
446 /* Announces videobuf that all went ok */
447 for (bc
= 0;; bc
++) {
448 if (list_empty(&dma_q
->active
)) {
449 dprintk(1,"No active queue to serve\n");
453 buf
= list_entry(dma_q
->active
.next
,
454 struct vivi_buffer
, vb
.queue
);
456 /* Nobody is waiting something to be done, just return */
457 if (!waitqueue_active(&buf
->vb
.done
)) {
458 mod_timer(&dma_q
->timeout
, jiffies
+BUFFER_TIMEOUT
);
462 do_gettimeofday(&buf
->vb
.ts
);
463 dprintk(2,"[%p/%d] wakeup\n",buf
,buf
->vb
.i
);
466 vivi_fillbuff(dev
,buf
);
468 if (list_empty(&dma_q
->active
)) {
469 del_timer(&dma_q
->timeout
);
471 mod_timer(&dma_q
->timeout
, jiffies
+BUFFER_TIMEOUT
);
474 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__
,bc
);
477 static void vivi_sleep(struct vivi_dmaqueue
*dma_q
)
480 DECLARE_WAITQUEUE(wait
, current
);
482 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__
,(unsigned long)dma_q
);
484 add_wait_queue(&dma_q
->wq
, &wait
);
485 if (!kthread_should_stop()) {
488 /* Calculate time to wake up */
489 timeout
=dma_q
->ini_jiffies
+msecs_to_jiffies((dma_q
->frame
*WAKE_NUMERATOR
*1000)/WAKE_DENOMINATOR
)-jiffies
;
492 int old
=dma_q
->frame
;
493 dma_q
->frame
=(jiffies_to_msecs(jiffies
-dma_q
->ini_jiffies
)*WAKE_DENOMINATOR
)/(WAKE_NUMERATOR
*1000)+1;
495 timeout
=dma_q
->ini_jiffies
+msecs_to_jiffies((dma_q
->frame
*WAKE_NUMERATOR
*1000)/WAKE_DENOMINATOR
)-jiffies
;
497 dprintk(1,"underrun, losed %d frames. "
498 "Now, frame is %d. Waking on %d jiffies\n",
499 dma_q
->frame
-old
,dma_q
->frame
,timeout
);
501 dprintk(1,"will sleep for %i jiffies\n",timeout
);
503 vivi_thread_tick(dma_q
);
505 schedule_timeout_interruptible (timeout
);
508 remove_wait_queue(&dma_q
->wq
, &wait
);
512 static int vivi_thread(void *data
)
514 struct vivi_dmaqueue
*dma_q
=data
;
516 dprintk(1,"thread started\n");
521 if (kthread_should_stop())
524 dprintk(1, "thread: exit\n");
528 static int vivi_start_thread(struct vivi_dmaqueue
*dma_q
)
531 dma_q
->ini_jiffies
=jiffies
;
533 dprintk(1,"%s\n",__FUNCTION__
);
534 init_waitqueue_head(&dma_q
->wq
);
536 dma_q
->kthread
= kthread_run(vivi_thread
, dma_q
, "vivi");
538 if (dma_q
->kthread
== NULL
) {
539 printk(KERN_ERR
"vivi: kernel_thread() failed\n");
542 dprintk(1,"returning from %s\n",__FUNCTION__
);
546 static void vivi_stop_thread(struct vivi_dmaqueue
*dma_q
)
548 dprintk(1,"%s\n",__FUNCTION__
);
549 /* shutdown control thread */
550 if (dma_q
->kthread
) {
551 kthread_stop(dma_q
->kthread
);
556 static int restart_video_queue(struct vivi_dmaqueue
*dma_q
)
558 struct vivi_buffer
*buf
, *prev
;
559 struct list_head
*item
;
561 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__
,(unsigned long)dma_q
);
563 if (!list_empty(&dma_q
->active
)) {
564 buf
= list_entry(dma_q
->active
.next
, struct vivi_buffer
, vb
.queue
);
565 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
568 dprintk(1,"Restarting video dma\n");
569 vivi_stop_thread(dma_q
);
570 // vivi_start_thread(dma_q);
572 /* cancel all outstanding capture / vbi requests */
573 list_for_each(item
,&dma_q
->active
) {
574 buf
= list_entry(item
, struct vivi_buffer
, vb
.queue
);
576 list_del(&buf
->vb
.queue
);
577 buf
->vb
.state
= STATE_ERROR
;
578 wake_up(&buf
->vb
.done
);
580 mod_timer(&dma_q
->timeout
, jiffies
+BUFFER_TIMEOUT
);
587 if (list_empty(&dma_q
->queued
))
589 buf
= list_entry(dma_q
->queued
.next
, struct vivi_buffer
, vb
.queue
);
591 list_del(&buf
->vb
.queue
);
592 list_add_tail(&buf
->vb
.queue
,&dma_q
->active
);
594 dprintk(1,"Restarting video dma\n");
595 vivi_stop_thread(dma_q
);
596 vivi_start_thread(dma_q
);
598 buf
->vb
.state
= STATE_ACTIVE
;
599 mod_timer(&dma_q
->timeout
, jiffies
+BUFFER_TIMEOUT
);
600 dprintk(2,"[%p/%d] restart_queue - first active\n",
603 } else if (prev
->vb
.width
== buf
->vb
.width
&&
604 prev
->vb
.height
== buf
->vb
.height
&&
605 prev
->fmt
== buf
->fmt
) {
606 list_del(&buf
->vb
.queue
);
607 list_add_tail(&buf
->vb
.queue
,&dma_q
->active
);
608 buf
->vb
.state
= STATE_ACTIVE
;
609 dprintk(2,"[%p/%d] restart_queue - move to active\n",
618 static void vivi_vid_timeout(unsigned long data
)
620 struct vivi_dev
*dev
= (struct vivi_dev
*)data
;
621 struct vivi_dmaqueue
*vidq
= &dev
->vidq
;
622 struct vivi_buffer
*buf
;
624 while (!list_empty(&vidq
->active
)) {
625 buf
= list_entry(vidq
->active
.next
, struct vivi_buffer
, vb
.queue
);
626 list_del(&buf
->vb
.queue
);
627 buf
->vb
.state
= STATE_ERROR
;
628 wake_up(&buf
->vb
.done
);
629 printk("vivi/0: [%p/%d] timeout\n", buf
, buf
->vb
.i
);
632 restart_video_queue(vidq
);
635 /* ------------------------------------------------------------------
637 ------------------------------------------------------------------*/
639 buffer_setup(struct videobuf_queue
*vq
, unsigned int *count
, unsigned int *size
)
641 struct vivi_fh
*fh
= vq
->priv_data
;
643 *size
= fh
->width
*fh
->height
*2;
647 while (*size
* *count
> vid_limit
* 1024 * 1024)
652 static void free_buffer(struct videobuf_queue
*vq
, struct vivi_buffer
*buf
)
654 dprintk(1,"%s\n",__FUNCTION__
);
659 /*FIXME: Maybe a spinlock is required here */
663 videobuf_waiton(&buf
->vb
,0,0);
664 videobuf_dma_unmap(vq
, &buf
->vb
.dma
);
665 videobuf_dma_free(&buf
->vb
.dma
);
666 buf
->vb
.state
= STATE_NEEDS_INIT
;
669 #define norm_maxw() 1024
670 #define norm_maxh() 768
672 buffer_prepare(struct videobuf_queue
*vq
, struct videobuf_buffer
*vb
,
673 enum v4l2_field field
)
675 struct vivi_fh
*fh
= vq
->priv_data
;
676 struct vivi_buffer
*buf
= container_of(vb
,struct vivi_buffer
,vb
);
677 int rc
, init_buffer
= 0;
679 // dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
681 BUG_ON(NULL
== fh
->fmt
);
682 if (fh
->width
< 48 || fh
->width
> norm_maxw() ||
683 fh
->height
< 32 || fh
->height
> norm_maxh())
685 buf
->vb
.size
= fh
->width
*fh
->height
*2;
686 if (0 != buf
->vb
.baddr
&& buf
->vb
.bsize
< buf
->vb
.size
)
689 if (buf
->fmt
!= fh
->fmt
||
690 buf
->vb
.width
!= fh
->width
||
691 buf
->vb
.height
!= fh
->height
||
692 buf
->vb
.field
!= field
) {
694 buf
->vb
.width
= fh
->width
;
695 buf
->vb
.height
= fh
->height
;
696 buf
->vb
.field
= field
;
700 if (STATE_NEEDS_INIT
== buf
->vb
.state
) {
701 if (0 != (rc
= videobuf_iolock(vq
,&buf
->vb
,NULL
)))
705 buf
->vb
.state
= STATE_PREPARED
;
707 if (NULL
== (buf
->to_addr
= kmalloc(sizeof(*buf
->to_addr
) * vb
->dma
.nr_pages
,GFP_KERNEL
))) {
720 buffer_queue(struct videobuf_queue
*vq
, struct videobuf_buffer
*vb
)
722 struct vivi_buffer
*buf
= container_of(vb
,struct vivi_buffer
,vb
);
723 struct vivi_fh
*fh
= vq
->priv_data
;
724 struct vivi_dev
*dev
= fh
->dev
;
725 struct vivi_dmaqueue
*vidq
= &dev
->vidq
;
726 struct vivi_buffer
*prev
;
728 if (!list_empty(&vidq
->queued
)) {
729 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf
->vb
.queue
);
730 list_add_tail(&buf
->vb
.queue
,&vidq
->queued
);
731 buf
->vb
.state
= STATE_QUEUED
;
732 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
734 } else if (list_empty(&vidq
->active
)) {
735 list_add_tail(&buf
->vb
.queue
,&vidq
->active
);
737 buf
->vb
.state
= STATE_ACTIVE
;
738 mod_timer(&vidq
->timeout
, jiffies
+BUFFER_TIMEOUT
);
739 dprintk(2,"[%p/%d] buffer_queue - first active\n",
742 vivi_start_thread(vidq
);
744 prev
= list_entry(vidq
->active
.prev
, struct vivi_buffer
, vb
.queue
);
745 if (prev
->vb
.width
== buf
->vb
.width
&&
746 prev
->vb
.height
== buf
->vb
.height
&&
747 prev
->fmt
== buf
->fmt
) {
748 list_add_tail(&buf
->vb
.queue
,&vidq
->active
);
749 buf
->vb
.state
= STATE_ACTIVE
;
750 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
754 list_add_tail(&buf
->vb
.queue
,&vidq
->queued
);
755 buf
->vb
.state
= STATE_QUEUED
;
756 dprintk(2,"[%p/%d] buffer_queue - first queued\n",
762 static void buffer_release(struct videobuf_queue
*vq
, struct videobuf_buffer
*vb
)
764 struct vivi_buffer
*buf
= container_of(vb
,struct vivi_buffer
,vb
);
765 struct vivi_fh
*fh
= vq
->priv_data
;
766 struct vivi_dev
*dev
= (struct vivi_dev
*)fh
->dev
;
767 struct vivi_dmaqueue
*vidq
= &dev
->vidq
;
769 dprintk(1,"%s\n",__FUNCTION__
);
771 vivi_stop_thread(vidq
);
776 static int vivi_map_sg(void *dev
, struct scatterlist
*sg
, int nents
,
781 dprintk(1,"%s, number of pages=%d\n",__FUNCTION__
,nents
);
782 BUG_ON(direction
== DMA_NONE
);
784 for (i
= 0; i
< nents
; i
++ ) {
787 sg_dma_address(&sg
[i
]) = page_to_phys(sg
[i
].page
) + sg
[i
].offset
;
793 static int vivi_unmap_sg(void *dev
,struct scatterlist
*sglist
,int nr_pages
,
796 dprintk(1,"%s\n",__FUNCTION__
);
800 static int vivi_dma_sync_sg(void *dev
,struct scatterlist
*sglist
, int nr_pages
,
803 // dprintk(1,"%s\n",__FUNCTION__);
805 // flush_write_buffers();
809 static struct videobuf_queue_ops vivi_video_qops
= {
810 .buf_setup
= buffer_setup
,
811 .buf_prepare
= buffer_prepare
,
812 .buf_queue
= buffer_queue
,
813 .buf_release
= buffer_release
,
815 /* Non-pci handling routines */
816 .vb_map_sg
= vivi_map_sg
,
817 .vb_dma_sync_sg
= vivi_dma_sync_sg
,
818 .vb_unmap_sg
= vivi_unmap_sg
,
821 /* ------------------------------------------------------------------
823 ------------------------------------------------------------------*/
826 static int res_get(struct vivi_dev
*dev
, struct vivi_fh
*fh
)
830 if (dev
->resources
) {
831 /* no, someone else uses it */
835 /* it's free, grab it */
837 dprintk(1,"res: get\n");
842 static int res_locked(struct vivi_dev
*dev
)
844 return (dev
->resources
);
847 static void res_free(struct vivi_dev
*dev
, struct vivi_fh
*fh
)
851 dprintk(1,"res: put\n");
855 /* ------------------------------------------------------------------
856 IOCTL vidioc handling
857 ------------------------------------------------------------------*/
858 static int vidioc_querycap (struct file
*file
, void *priv
,
859 struct v4l2_capability
*cap
)
861 strcpy(cap
->driver
, "vivi");
862 strcpy(cap
->card
, "vivi");
863 cap
->version
= VIVI_VERSION
;
864 cap
->capabilities
= V4L2_CAP_VIDEO_CAPTURE
|
870 static int vidioc_enum_fmt_cap (struct file
*file
, void *priv
,
871 struct v4l2_fmtdesc
*f
)
876 strlcpy(f
->description
,format
.name
,sizeof(f
->description
));
877 f
->pixelformat
= format
.fourcc
;
881 static int vidioc_g_fmt_cap (struct file
*file
, void *priv
,
882 struct v4l2_format
*f
)
884 struct vivi_fh
*fh
=priv
;
886 f
->fmt
.pix
.width
= fh
->width
;
887 f
->fmt
.pix
.height
= fh
->height
;
888 f
->fmt
.pix
.field
= fh
->vb_vidq
.field
;
889 f
->fmt
.pix
.pixelformat
= fh
->fmt
->fourcc
;
890 f
->fmt
.pix
.bytesperline
=
891 (f
->fmt
.pix
.width
* fh
->fmt
->depth
) >> 3;
892 f
->fmt
.pix
.sizeimage
=
893 f
->fmt
.pix
.height
* f
->fmt
.pix
.bytesperline
;
898 static int vidioc_try_fmt_cap (struct file
*file
, void *priv
,
899 struct v4l2_format
*f
)
901 struct vivi_fmt
*fmt
;
902 enum v4l2_field field
;
903 unsigned int maxw
, maxh
;
905 if (format
.fourcc
!= f
->fmt
.pix
.pixelformat
) {
906 dprintk(1,"Fourcc format (0x%08x) invalid. Driver accepts "
907 "only 0x%08x\n",f
->fmt
.pix
.pixelformat
,format
.fourcc
);
912 field
= f
->fmt
.pix
.field
;
914 if (field
== V4L2_FIELD_ANY
) {
915 // field=V4L2_FIELD_INTERLACED;
916 field
=V4L2_FIELD_SEQ_TB
;
917 } else if (V4L2_FIELD_INTERLACED
!= field
) {
918 dprintk(1,"Field type invalid.\n");
925 f
->fmt
.pix
.field
= field
;
926 if (f
->fmt
.pix
.height
< 32)
927 f
->fmt
.pix
.height
= 32;
928 if (f
->fmt
.pix
.height
> maxh
)
929 f
->fmt
.pix
.height
= maxh
;
930 if (f
->fmt
.pix
.width
< 48)
931 f
->fmt
.pix
.width
= 48;
932 if (f
->fmt
.pix
.width
> maxw
)
933 f
->fmt
.pix
.width
= maxw
;
934 f
->fmt
.pix
.width
&= ~0x03;
935 f
->fmt
.pix
.bytesperline
=
936 (f
->fmt
.pix
.width
* fmt
->depth
) >> 3;
937 f
->fmt
.pix
.sizeimage
=
938 f
->fmt
.pix
.height
* f
->fmt
.pix
.bytesperline
;
943 /*FIXME: This seems to be generic enough to be at videodev2 */
944 static int vidioc_s_fmt_cap (struct file
*file
, void *priv
,
945 struct v4l2_format
*f
)
947 struct vivi_fh
*fh
=priv
;
948 int ret
= vidioc_try_fmt_cap(file
,fh
,f
);
953 fh
->width
= f
->fmt
.pix
.width
;
954 fh
->height
= f
->fmt
.pix
.height
;
955 fh
->vb_vidq
.field
= f
->fmt
.pix
.field
;
961 static int vidioc_reqbufs (struct file
*file
, void *priv
, struct v4l2_requestbuffers
*p
)
963 struct vivi_fh
*fh
=priv
;
965 return (videobuf_reqbufs(&fh
->vb_vidq
, p
));
968 static int vidioc_querybuf (struct file
*file
, void *priv
, struct v4l2_buffer
*p
)
970 struct vivi_fh
*fh
=priv
;
972 return (videobuf_querybuf(&fh
->vb_vidq
, p
));
975 static int vidioc_qbuf (struct file
*file
, void *priv
, struct v4l2_buffer
*p
)
977 struct vivi_fh
*fh
=priv
;
979 return (videobuf_qbuf(&fh
->vb_vidq
, p
));
982 static int vidioc_dqbuf (struct file
*file
, void *priv
, struct v4l2_buffer
*p
)
984 struct vivi_fh
*fh
=priv
;
986 return (videobuf_dqbuf(&fh
->vb_vidq
, p
,
987 file
->f_flags
& O_NONBLOCK
));
990 #ifdef CONFIG_VIDEO_V4L1_COMPAT
991 static int vidiocgmbuf (struct file
*file
, void *priv
, struct video_mbuf
*mbuf
)
993 struct vivi_fh
*fh
=priv
;
994 struct videobuf_queue
*q
=&fh
->vb_vidq
;
995 struct v4l2_requestbuffers req
;
1001 req
.memory
= V4L2_MEMORY_MMAP
;
1002 ret
= videobuf_reqbufs(q
,&req
);
1006 mbuf
->frames
= req
.count
;
1008 for (i
= 0; i
< mbuf
->frames
; i
++) {
1009 mbuf
->offsets
[i
] = q
->bufs
[i
]->boff
;
1010 mbuf
->size
+= q
->bufs
[i
]->bsize
;
1016 static int vidioc_streamon(struct file
*file
, void *priv
, enum v4l2_buf_type i
)
1018 struct vivi_fh
*fh
=priv
;
1019 struct vivi_dev
*dev
= fh
->dev
;
1021 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1026 if (!res_get(dev
,fh
))
1028 return (videobuf_streamon(&fh
->vb_vidq
));
1031 static int vidioc_streamoff(struct file
*file
, void *priv
, enum v4l2_buf_type i
)
1033 struct vivi_fh
*fh
=priv
;
1034 struct vivi_dev
*dev
= fh
->dev
;
1036 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1041 videobuf_streamoff(&fh
->vb_vidq
);
1047 static struct v4l2_tvnorm tvnorms
[] = {
1050 .id
= V4L2_STD_NTSC_M
,
1054 static int vidioc_s_std (struct file
*file
, void *priv
, v4l2_std_id a
)
1060 /* only one input in this sample driver */
1061 static int vidioc_enum_input (struct file
*file
, void *priv
,
1062 struct v4l2_input
*inp
)
1064 if (inp
->index
!= 0)
1067 inp
->type
= V4L2_INPUT_TYPE_CAMERA
;
1068 inp
->std
= V4L2_STD_NTSC_M
;
1069 strcpy(inp
->name
,"Camera");
1074 static int vidioc_g_input (struct file
*file
, void *priv
, unsigned int *i
)
1080 static int vidioc_s_input (struct file
*file
, void *priv
, unsigned int i
)
1088 /* --- controls ---------------------------------------------- */
1089 static int vidioc_queryctrl (struct file
*file
, void *priv
,
1090 struct v4l2_queryctrl
*qc
)
1094 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
1095 if (qc
->id
&& qc
->id
== vivi_qctrl
[i
].id
) {
1096 memcpy(qc
, &(vivi_qctrl
[i
]),
1104 static int vidioc_g_ctrl (struct file
*file
, void *priv
,
1105 struct v4l2_control
*ctrl
)
1109 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
1110 if (ctrl
->id
== vivi_qctrl
[i
].id
) {
1111 ctrl
->value
=qctl_regs
[i
];
1117 static int vidioc_s_ctrl (struct file
*file
, void *priv
,
1118 struct v4l2_control
*ctrl
)
1122 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
1123 if (ctrl
->id
== vivi_qctrl
[i
].id
) {
1125 vivi_qctrl
[i
].minimum
1127 vivi_qctrl
[i
].maximum
) {
1130 qctl_regs
[i
]=ctrl
->value
;
1136 /* ------------------------------------------------------------------
1137 File operations for the device
1138 ------------------------------------------------------------------*/
1140 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1142 static int vivi_open(struct inode
*inode
, struct file
*file
)
1144 int minor
= iminor(inode
);
1145 struct vivi_dev
*h
,*dev
= NULL
;
1147 struct list_head
*list
;
1148 enum v4l2_buf_type type
= 0;
1151 printk(KERN_DEBUG
"vivi: open called (minor=%d)\n",minor
);
1153 list_for_each(list
,&vivi_devlist
) {
1154 h
= list_entry(list
, struct vivi_dev
, vivi_devlist
);
1155 if (h
->vfd
.minor
== minor
) {
1157 type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1165 /* If more than one user, mutex should be added */
1168 dprintk(1,"open minor=%d type=%s users=%d\n",
1169 minor
,v4l2_type_names
[type
],dev
->users
);
1171 /* allocate + initialize per filehandle data */
1172 fh
= kzalloc(sizeof(*fh
),GFP_KERNEL
);
1178 file
->private_data
= fh
;
1181 fh
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1186 /* Put all controls at a sane state */
1187 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
1188 qctl_regs
[i
] =vivi_qctrl
[i
].default_value
;
1190 dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1191 (unsigned long)fh
,(unsigned long)dev
,(unsigned long)&dev
->vidq
);
1192 dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev
->vidq
.queued
));
1193 dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev
->vidq
.active
));
1195 /* Resets frame counters */
1200 dev
->jiffies
=jiffies
;
1201 sprintf(dev
->timestr
,"%02d:%02d:%02d:%03d",
1202 dev
->h
,dev
->m
,dev
->s
,(dev
->us
+500)/1000);
1204 videobuf_queue_init(&fh
->vb_vidq
, &vivi_video_qops
,
1207 V4L2_FIELD_INTERLACED
,
1208 sizeof(struct vivi_buffer
),fh
);
1214 vivi_read(struct file
*file
, char __user
*data
, size_t count
, loff_t
*ppos
)
1216 struct vivi_fh
*fh
= file
->private_data
;
1218 if (fh
->type
==V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1219 if (res_locked(fh
->dev
))
1221 return videobuf_read_one(&fh
->vb_vidq
, data
, count
, ppos
,
1222 file
->f_flags
& O_NONBLOCK
);
1228 vivi_poll(struct file
*file
, struct poll_table_struct
*wait
)
1230 struct vivi_fh
*fh
= file
->private_data
;
1231 struct vivi_buffer
*buf
;
1233 dprintk(1,"%s\n",__FUNCTION__
);
1235 if (V4L2_BUF_TYPE_VIDEO_CAPTURE
!= fh
->type
)
1238 if (res_get(fh
->dev
,fh
)) {
1239 dprintk(1,"poll: mmap interface\n");
1240 /* streaming capture */
1241 if (list_empty(&fh
->vb_vidq
.stream
))
1243 buf
= list_entry(fh
->vb_vidq
.stream
.next
,struct vivi_buffer
,vb
.stream
);
1245 dprintk(1,"poll: read() interface\n");
1246 /* read() capture */
1247 buf
= (struct vivi_buffer
*)fh
->vb_vidq
.read_buf
;
1251 poll_wait(file
, &buf
->vb
.done
, wait
);
1252 if (buf
->vb
.state
== STATE_DONE
||
1253 buf
->vb
.state
== STATE_ERROR
)
1254 return POLLIN
|POLLRDNORM
;
1258 static int vivi_release(struct inode
*inode
, struct file
*file
)
1260 struct vivi_fh
*fh
= file
->private_data
;
1261 struct vivi_dev
*dev
= fh
->dev
;
1262 struct vivi_dmaqueue
*vidq
= &dev
->vidq
;
1264 int minor
= iminor(inode
);
1266 vivi_stop_thread(vidq
);
1267 videobuf_mmap_free(&fh
->vb_vidq
);
1273 printk(KERN_DEBUG
"vivi: close called (minor=%d, users=%d)\n",minor
,dev
->users
);
1279 vivi_mmap(struct file
*file
, struct vm_area_struct
* vma
)
1281 struct vivi_fh
*fh
= file
->private_data
;
1284 dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma
);
1286 ret
=videobuf_mmap_mapper(&fh
->vb_vidq
, vma
);
1288 dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1289 (unsigned long)vma
->vm_start
,
1290 (unsigned long)vma
->vm_end
-(unsigned long)vma
->vm_start
,
1296 static struct file_operations vivi_fops
= {
1297 .owner
= THIS_MODULE
,
1299 .release
= vivi_release
,
1302 .ioctl
= video_ioctl2
, /* V4L2 ioctl handler */
1304 .llseek
= no_llseek
,
1307 static struct video_device vivi
= {
1309 .type
= VID_TYPE_CAPTURE
,
1313 // .release = video_device_release,
1315 .vidioc_querycap
= vidioc_querycap
,
1316 .vidioc_enum_fmt_cap
= vidioc_enum_fmt_cap
,
1317 .vidioc_g_fmt_cap
= vidioc_g_fmt_cap
,
1318 .vidioc_try_fmt_cap
= vidioc_try_fmt_cap
,
1319 .vidioc_s_fmt_cap
= vidioc_s_fmt_cap
,
1320 .vidioc_reqbufs
= vidioc_reqbufs
,
1321 .vidioc_querybuf
= vidioc_querybuf
,
1322 .vidioc_qbuf
= vidioc_qbuf
,
1323 .vidioc_dqbuf
= vidioc_dqbuf
,
1324 .vidioc_s_std
= vidioc_s_std
,
1325 .vidioc_enum_input
= vidioc_enum_input
,
1326 .vidioc_g_input
= vidioc_g_input
,
1327 .vidioc_s_input
= vidioc_s_input
,
1328 .vidioc_queryctrl
= vidioc_queryctrl
,
1329 .vidioc_g_ctrl
= vidioc_g_ctrl
,
1330 .vidioc_s_ctrl
= vidioc_s_ctrl
,
1331 .vidioc_streamon
= vidioc_streamon
,
1332 .vidioc_streamoff
= vidioc_streamoff
,
1333 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1334 .vidiocgmbuf
= vidiocgmbuf
,
1337 .tvnormsize
= ARRAY_SIZE(tvnorms
),
1339 /* -----------------------------------------------------------------
1340 Initialization and module stuff
1341 ------------------------------------------------------------------*/
1343 static int __init
vivi_init(void)
1346 struct vivi_dev
*dev
;
1348 dev
= kzalloc(sizeof(*dev
),GFP_KERNEL
);
1351 list_add_tail(&dev
->vivi_devlist
,&vivi_devlist
);
1353 /* init video dma queues */
1354 INIT_LIST_HEAD(&dev
->vidq
.active
);
1355 INIT_LIST_HEAD(&dev
->vidq
.queued
);
1357 /* initialize locks */
1358 init_MUTEX(&dev
->lock
);
1360 dev
->vidq
.timeout
.function
= vivi_vid_timeout
;
1361 dev
->vidq
.timeout
.data
= (unsigned long)dev
;
1362 init_timer(&dev
->vidq
.timeout
);
1364 vivi
.current_norm
= tvnorms
[0].id
;
1366 ret
= video_register_device(&vivi
, VFL_TYPE_GRABBER
, video_nr
);
1367 printk(KERN_INFO
"Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret
);
1371 static void __exit
vivi_exit(void)
1374 struct list_head
*list
;
1376 list_for_each(list
,&vivi_devlist
) {
1377 h
= list_entry(list
, struct vivi_dev
, vivi_devlist
);
1380 video_unregister_device(&vivi
);
1383 module_init(vivi_init
);
1384 module_exit(vivi_exit
);
1386 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1387 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1388 MODULE_LICENSE("Dual BSD/GPL");
1390 module_param(video_nr
, int, 0);
1392 module_param_named(debug
,vivi
.debug
, int, 0644);
1393 MODULE_PARM_DESC(debug
,"activates debug info");
1395 module_param(vid_limit
,int,0644);
1396 MODULE_PARM_DESC(vid_limit
,"capture memory limit in megabytes");