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/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>
35 #include <linux/interrupt.h>
36 #include <media/videobuf-vmalloc.h>
37 #include <media/v4l2-common.h>
38 #include <media/v4l2-ioctl.h>
39 #include <linux/kthread.h>
40 #include <linux/highmem.h>
41 #include <linux/freezer.h>
43 #define VIVI_MODULE_NAME "vivi"
45 /* Wake up at about 30 fps */
46 #define WAKE_NUMERATOR 30
47 #define WAKE_DENOMINATOR 1001
48 #define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
52 #define VIVI_MAJOR_VERSION 0
53 #define VIVI_MINOR_VERSION 5
54 #define VIVI_RELEASE 0
55 #define VIVI_VERSION \
56 KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
58 /* Declare static vars that will be used as parameters */
59 static unsigned int vid_limit
= 16; /* Video memory limit, in Mb */
60 static int video_nr
= -1; /* /dev/videoN, -1 for autodetect */
61 static int n_devs
= 1; /* Number of virtual devices */
63 /* supported controls */
64 static struct v4l2_queryctrl vivi_qctrl
[] = {
66 .id
= V4L2_CID_AUDIO_VOLUME
,
71 .default_value
= 65535,
73 .type
= V4L2_CTRL_TYPE_INTEGER
,
75 .id
= V4L2_CID_BRIGHTNESS
,
76 .type
= V4L2_CTRL_TYPE_INTEGER
,
84 .id
= V4L2_CID_CONTRAST
,
85 .type
= V4L2_CTRL_TYPE_INTEGER
,
90 .default_value
= 0x10,
93 .id
= V4L2_CID_SATURATION
,
94 .type
= V4L2_CTRL_TYPE_INTEGER
,
103 .type
= V4L2_CTRL_TYPE_INTEGER
,
113 static int qctl_regs
[ARRAY_SIZE(vivi_qctrl
)];
115 #define dprintk(dev, level, fmt, arg...) \
117 if (dev->vfd->debug >= (level)) \
118 printk(KERN_DEBUG "vivi: " fmt , ## arg); \
121 /* ------------------------------------------------------------------
123 ------------------------------------------------------------------*/
127 u32 fourcc
; /* v4l2 format id */
131 static struct vivi_fmt format
= {
132 .name
= "4:2:2, packed, YUYV",
133 .fourcc
= V4L2_PIX_FMT_YUYV
,
139 struct scatterlist
*sg
;
142 /* buffer for one video frame */
144 /* common v4l buffer stuff -- must be first */
145 struct videobuf_buffer vb
;
147 struct vivi_fmt
*fmt
;
150 struct vivi_dmaqueue
{
151 struct list_head active
;
153 /* thread for generating video stream*/
154 struct task_struct
*kthread
;
155 wait_queue_head_t wq
;
156 /* Counters to control fps rate */
161 static LIST_HEAD(vivi_devlist
);
164 struct list_head vivi_devlist
;
171 /* various device info */
172 struct video_device
*vfd
;
174 struct vivi_dmaqueue vidq
;
176 /* Several counters */
178 unsigned long jiffies
;
181 int mv_count
; /* Controls bars movement */
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 */
212 static u8 bars
[8][3] = {
214 {204, 204, 204}, /* white */
215 {208, 208, 0}, /* ambar */
216 { 0, 206, 206}, /* cyan */
217 { 0, 239, 0}, /* green */
218 {239, 0, 239}, /* magenta */
219 {205, 0, 0}, /* red */
220 { 0, 0, 255}, /* blue */
221 { 0, 0, 0}, /* black */
224 #define TO_Y(r, g, b) \
225 (((16829 * r + 33039 * g + 6416 * b + 32768) >> 16) + 16)
226 /* RGB to V(Cr) Color transform */
227 #define TO_V(r, g, b) \
228 (((28784 * r - 24103 * g - 4681 * b + 32768) >> 16) + 128)
229 /* RGB to U(Cb) Color transform */
230 #define TO_U(r, g, b) \
231 (((-9714 * r - 19070 * g + 28784 * b + 32768) >> 16) + 128)
233 #define TSTAMP_MIN_Y 24
234 #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
235 #define TSTAMP_MIN_X 64
237 static void gen_line(char *basep
, int inipos
, int wmax
,
238 int hmax
, int line
, int count
, char *timestr
)
243 u8 chr
, r
, g
, b
, color
;
245 /* We will just duplicate the second pixel at the packet */
248 /* Generate a standard color bar pattern */
249 for (w
= 0; w
< wmax
; w
++) {
250 int colorpos
= ((w
+ count
) * 8/(wmax
+ 1)) % 8;
251 r
= bars
[colorpos
][0];
252 g
= bars
[colorpos
][1];
253 b
= bars
[colorpos
][2];
255 for (color
= 0; color
< 4; color
++) {
261 *p
= TO_Y(r
, g
, b
); /* Luma */
264 *p
= TO_U(r
, g
, b
); /* Cb */
267 *p
= TO_V(r
, g
, b
); /* Cr */
274 /* Checks if it is possible to show timestamp */
275 if (TSTAMP_MAX_Y
>= hmax
)
277 if (TSTAMP_MIN_X
+ strlen(timestr
) >= wmax
)
280 /* Print stream time */
281 if (line
>= TSTAMP_MIN_Y
&& line
<= TSTAMP_MAX_Y
) {
283 for (s
= timestr
; *s
; s
++) {
284 chr
= rom8x16_bits
[(*s
-0x30)*16+line
-TSTAMP_MIN_Y
];
285 for (i
= 0; i
< 7; i
++) {
286 if (chr
& 1 << (7 - i
)) {
292 /* Background color */
298 pos
= inipos
+ j
* 2;
299 for (color
= 0; color
< 4; color
++) {
307 *p
= TO_Y(r
, g
, b
); /* Luma */
310 *p
= TO_U(r
, g
, b
); /* Cb */
313 *p
= TO_V(r
, g
, b
); /* Cr */
327 static void vivi_fillbuff(struct vivi_dev
*dev
, struct vivi_buffer
*buf
)
330 int hmax
= buf
->vb
.height
;
331 int wmax
= buf
->vb
.width
;
334 void *vbuf
= videobuf_to_vmalloc(&buf
->vb
);
339 tmpbuf
= kmalloc(wmax
* 2, GFP_ATOMIC
);
343 for (h
= 0; h
< hmax
; h
++) {
344 gen_line(tmpbuf
, 0, wmax
, hmax
, h
, dev
->mv_count
,
346 memcpy(vbuf
+ pos
, tmpbuf
, wmax
* 2);
354 /* Updates stream time */
356 dev
->ms
+= jiffies_to_msecs(jiffies
-dev
->jiffies
);
357 dev
->jiffies
= jiffies
;
358 if (dev
->ms
>= 1000) {
372 sprintf(dev
->timestr
, "%02d:%02d:%02d:%03d",
373 dev
->h
, dev
->m
, dev
->s
, dev
->ms
);
375 dprintk(dev
, 2, "vivifill at %s: Buffer 0x%08lx size= %d\n",
376 dev
->timestr
, (unsigned long)tmpbuf
, pos
);
378 /* Advice that buffer was filled */
379 buf
->vb
.field_count
++;
380 do_gettimeofday(&ts
);
382 buf
->vb
.state
= VIDEOBUF_DONE
;
385 static void vivi_thread_tick(struct vivi_fh
*fh
)
387 struct vivi_buffer
*buf
;
388 struct vivi_dev
*dev
= fh
->dev
;
389 struct vivi_dmaqueue
*dma_q
= &dev
->vidq
;
391 unsigned long flags
= 0;
393 dprintk(dev
, 1, "Thread tick\n");
395 spin_lock_irqsave(&dev
->slock
, flags
);
396 if (list_empty(&dma_q
->active
)) {
397 dprintk(dev
, 1, "No active queue to serve\n");
401 buf
= list_entry(dma_q
->active
.next
,
402 struct vivi_buffer
, vb
.queue
);
404 /* Nobody is waiting on this buffer, return */
405 if (!waitqueue_active(&buf
->vb
.done
))
408 list_del(&buf
->vb
.queue
);
410 do_gettimeofday(&buf
->vb
.ts
);
413 vivi_fillbuff(dev
, buf
);
414 dprintk(dev
, 1, "filled buffer %p\n", buf
);
416 wake_up(&buf
->vb
.done
);
417 dprintk(dev
, 2, "[%p/%d] wakeup\n", buf
, buf
->vb
. i
);
419 spin_unlock_irqrestore(&dev
->slock
, flags
);
423 #define frames_to_ms(frames) \
424 ((frames * WAKE_NUMERATOR * 1000) / WAKE_DENOMINATOR)
426 static void vivi_sleep(struct vivi_fh
*fh
)
428 struct vivi_dev
*dev
= fh
->dev
;
429 struct vivi_dmaqueue
*dma_q
= &dev
->vidq
;
431 DECLARE_WAITQUEUE(wait
, current
);
433 dprintk(dev
, 1, "%s dma_q=0x%08lx\n", __func__
,
434 (unsigned long)dma_q
);
436 add_wait_queue(&dma_q
->wq
, &wait
);
437 if (kthread_should_stop())
440 /* Calculate time to wake up */
441 timeout
= msecs_to_jiffies(frames_to_ms(1));
443 vivi_thread_tick(fh
);
445 schedule_timeout_interruptible(timeout
);
448 remove_wait_queue(&dma_q
->wq
, &wait
);
452 static int vivi_thread(void *data
)
454 struct vivi_fh
*fh
= data
;
455 struct vivi_dev
*dev
= fh
->dev
;
457 dprintk(dev
, 1, "thread started\n");
464 if (kthread_should_stop())
467 dprintk(dev
, 1, "thread: exit\n");
471 static int vivi_start_thread(struct vivi_fh
*fh
)
473 struct vivi_dev
*dev
= fh
->dev
;
474 struct vivi_dmaqueue
*dma_q
= &dev
->vidq
;
477 dma_q
->ini_jiffies
= jiffies
;
479 dprintk(dev
, 1, "%s\n", __func__
);
481 dma_q
->kthread
= kthread_run(vivi_thread
, fh
, "vivi");
483 if (IS_ERR(dma_q
->kthread
)) {
484 printk(KERN_ERR
"vivi: kernel_thread() failed\n");
485 return PTR_ERR(dma_q
->kthread
);
488 wake_up_interruptible(&dma_q
->wq
);
490 dprintk(dev
, 1, "returning from %s\n", __func__
);
494 static void vivi_stop_thread(struct vivi_dmaqueue
*dma_q
)
496 struct vivi_dev
*dev
= container_of(dma_q
, struct vivi_dev
, vidq
);
498 dprintk(dev
, 1, "%s\n", __func__
);
499 /* shutdown control thread */
500 if (dma_q
->kthread
) {
501 kthread_stop(dma_q
->kthread
);
502 dma_q
->kthread
= NULL
;
506 /* ------------------------------------------------------------------
508 ------------------------------------------------------------------*/
510 buffer_setup(struct videobuf_queue
*vq
, unsigned int *count
, unsigned int *size
)
512 struct vivi_fh
*fh
= vq
->priv_data
;
513 struct vivi_dev
*dev
= fh
->dev
;
515 *size
= fh
->width
*fh
->height
*2;
520 while (*size
* *count
> vid_limit
* 1024 * 1024)
523 dprintk(dev
, 1, "%s, count=%d, size=%d\n", __func__
,
529 static void free_buffer(struct videobuf_queue
*vq
, struct vivi_buffer
*buf
)
531 struct vivi_fh
*fh
= vq
->priv_data
;
532 struct vivi_dev
*dev
= fh
->dev
;
534 dprintk(dev
, 1, "%s, state: %i\n", __func__
, buf
->vb
.state
);
539 videobuf_vmalloc_free(&buf
->vb
);
540 dprintk(dev
, 1, "free_buffer: freed\n");
541 buf
->vb
.state
= VIDEOBUF_NEEDS_INIT
;
544 #define norm_maxw() 1024
545 #define norm_maxh() 768
547 buffer_prepare(struct videobuf_queue
*vq
, struct videobuf_buffer
*vb
,
548 enum v4l2_field field
)
550 struct vivi_fh
*fh
= vq
->priv_data
;
551 struct vivi_dev
*dev
= fh
->dev
;
552 struct vivi_buffer
*buf
= container_of(vb
, struct vivi_buffer
, vb
);
555 dprintk(dev
, 1, "%s, field=%d\n", __func__
, field
);
557 BUG_ON(NULL
== fh
->fmt
);
559 if (fh
->width
< 48 || fh
->width
> norm_maxw() ||
560 fh
->height
< 32 || fh
->height
> norm_maxh())
563 buf
->vb
.size
= fh
->width
*fh
->height
*2;
564 if (0 != buf
->vb
.baddr
&& buf
->vb
.bsize
< buf
->vb
.size
)
567 /* These properties only change when queue is idle, see s_fmt */
569 buf
->vb
.width
= fh
->width
;
570 buf
->vb
.height
= fh
->height
;
571 buf
->vb
.field
= field
;
573 if (VIDEOBUF_NEEDS_INIT
== buf
->vb
.state
) {
574 rc
= videobuf_iolock(vq
, &buf
->vb
, NULL
);
579 buf
->vb
.state
= VIDEOBUF_PREPARED
;
584 free_buffer(vq
, buf
);
589 buffer_queue(struct videobuf_queue
*vq
, struct videobuf_buffer
*vb
)
591 struct vivi_buffer
*buf
= container_of(vb
, struct vivi_buffer
, vb
);
592 struct vivi_fh
*fh
= vq
->priv_data
;
593 struct vivi_dev
*dev
= fh
->dev
;
594 struct vivi_dmaqueue
*vidq
= &dev
->vidq
;
596 dprintk(dev
, 1, "%s\n", __func__
);
598 buf
->vb
.state
= VIDEOBUF_QUEUED
;
599 list_add_tail(&buf
->vb
.queue
, &vidq
->active
);
602 static void buffer_release(struct videobuf_queue
*vq
,
603 struct videobuf_buffer
*vb
)
605 struct vivi_buffer
*buf
= container_of(vb
, struct vivi_buffer
, vb
);
606 struct vivi_fh
*fh
= vq
->priv_data
;
607 struct vivi_dev
*dev
= (struct vivi_dev
*)fh
->dev
;
609 dprintk(dev
, 1, "%s\n", __func__
);
611 free_buffer(vq
, buf
);
614 static struct videobuf_queue_ops vivi_video_qops
= {
615 .buf_setup
= buffer_setup
,
616 .buf_prepare
= buffer_prepare
,
617 .buf_queue
= buffer_queue
,
618 .buf_release
= buffer_release
,
621 /* ------------------------------------------------------------------
622 IOCTL vidioc handling
623 ------------------------------------------------------------------*/
624 static int vidioc_querycap(struct file
*file
, void *priv
,
625 struct v4l2_capability
*cap
)
627 strcpy(cap
->driver
, "vivi");
628 strcpy(cap
->card
, "vivi");
629 cap
->version
= VIVI_VERSION
;
630 cap
->capabilities
= V4L2_CAP_VIDEO_CAPTURE
|
636 static int vidioc_enum_fmt_vid_cap(struct file
*file
, void *priv
,
637 struct v4l2_fmtdesc
*f
)
642 strlcpy(f
->description
, format
.name
, sizeof(f
->description
));
643 f
->pixelformat
= format
.fourcc
;
647 static int vidioc_g_fmt_vid_cap(struct file
*file
, void *priv
,
648 struct v4l2_format
*f
)
650 struct vivi_fh
*fh
= priv
;
652 f
->fmt
.pix
.width
= fh
->width
;
653 f
->fmt
.pix
.height
= fh
->height
;
654 f
->fmt
.pix
.field
= fh
->vb_vidq
.field
;
655 f
->fmt
.pix
.pixelformat
= fh
->fmt
->fourcc
;
656 f
->fmt
.pix
.bytesperline
=
657 (f
->fmt
.pix
.width
* fh
->fmt
->depth
) >> 3;
658 f
->fmt
.pix
.sizeimage
=
659 f
->fmt
.pix
.height
* f
->fmt
.pix
.bytesperline
;
664 static int vidioc_try_fmt_vid_cap(struct file
*file
, void *priv
,
665 struct v4l2_format
*f
)
667 struct vivi_fh
*fh
= priv
;
668 struct vivi_dev
*dev
= fh
->dev
;
669 struct vivi_fmt
*fmt
;
670 enum v4l2_field field
;
671 unsigned int maxw
, maxh
;
673 if (format
.fourcc
!= f
->fmt
.pix
.pixelformat
) {
674 dprintk(dev
, 1, "Fourcc format (0x%08x) invalid. "
675 "Driver accepts only 0x%08x\n",
676 f
->fmt
.pix
.pixelformat
, format
.fourcc
);
681 field
= f
->fmt
.pix
.field
;
683 if (field
== V4L2_FIELD_ANY
) {
684 field
= V4L2_FIELD_INTERLACED
;
685 } else if (V4L2_FIELD_INTERLACED
!= field
) {
686 dprintk(dev
, 1, "Field type invalid.\n");
693 f
->fmt
.pix
.field
= field
;
694 if (f
->fmt
.pix
.height
< 32)
695 f
->fmt
.pix
.height
= 32;
696 if (f
->fmt
.pix
.height
> maxh
)
697 f
->fmt
.pix
.height
= maxh
;
698 if (f
->fmt
.pix
.width
< 48)
699 f
->fmt
.pix
.width
= 48;
700 if (f
->fmt
.pix
.width
> maxw
)
701 f
->fmt
.pix
.width
= maxw
;
702 f
->fmt
.pix
.width
&= ~0x03;
703 f
->fmt
.pix
.bytesperline
=
704 (f
->fmt
.pix
.width
* fmt
->depth
) >> 3;
705 f
->fmt
.pix
.sizeimage
=
706 f
->fmt
.pix
.height
* f
->fmt
.pix
.bytesperline
;
711 /*FIXME: This seems to be generic enough to be at videodev2 */
712 static int vidioc_s_fmt_vid_cap(struct file
*file
, void *priv
,
713 struct v4l2_format
*f
)
715 struct vivi_fh
*fh
= priv
;
716 struct videobuf_queue
*q
= &fh
->vb_vidq
;
718 int ret
= vidioc_try_fmt_vid_cap(file
, fh
, f
);
722 mutex_lock(&q
->vb_lock
);
724 if (videobuf_queue_is_busy(&fh
->vb_vidq
)) {
725 dprintk(fh
->dev
, 1, "%s queue busy\n", __func__
);
731 fh
->width
= f
->fmt
.pix
.width
;
732 fh
->height
= f
->fmt
.pix
.height
;
733 fh
->vb_vidq
.field
= f
->fmt
.pix
.field
;
738 mutex_unlock(&q
->vb_lock
);
743 static int vidioc_reqbufs(struct file
*file
, void *priv
,
744 struct v4l2_requestbuffers
*p
)
746 struct vivi_fh
*fh
= priv
;
748 return (videobuf_reqbufs(&fh
->vb_vidq
, p
));
751 static int vidioc_querybuf(struct file
*file
, void *priv
, struct v4l2_buffer
*p
)
753 struct vivi_fh
*fh
= priv
;
755 return (videobuf_querybuf(&fh
->vb_vidq
, p
));
758 static int vidioc_qbuf(struct file
*file
, void *priv
, struct v4l2_buffer
*p
)
760 struct vivi_fh
*fh
= priv
;
762 return (videobuf_qbuf(&fh
->vb_vidq
, p
));
765 static int vidioc_dqbuf(struct file
*file
, void *priv
, struct v4l2_buffer
*p
)
767 struct vivi_fh
*fh
= priv
;
769 return (videobuf_dqbuf(&fh
->vb_vidq
, p
,
770 file
->f_flags
& O_NONBLOCK
));
773 #ifdef CONFIG_VIDEO_V4L1_COMPAT
774 static int vidiocgmbuf(struct file
*file
, void *priv
, struct video_mbuf
*mbuf
)
776 struct vivi_fh
*fh
= priv
;
778 return videobuf_cgmbuf(&fh
->vb_vidq
, mbuf
, 8);
782 static int vidioc_streamon(struct file
*file
, void *priv
, enum v4l2_buf_type i
)
784 struct vivi_fh
*fh
= priv
;
786 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
791 return videobuf_streamon(&fh
->vb_vidq
);
794 static int vidioc_streamoff(struct file
*file
, void *priv
, enum v4l2_buf_type i
)
796 struct vivi_fh
*fh
= priv
;
798 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
803 return videobuf_streamoff(&fh
->vb_vidq
);
806 static int vidioc_s_std(struct file
*file
, void *priv
, v4l2_std_id
*i
)
811 /* only one input in this sample driver */
812 static int vidioc_enum_input(struct file
*file
, void *priv
,
813 struct v4l2_input
*inp
)
818 inp
->type
= V4L2_INPUT_TYPE_CAMERA
;
819 inp
->std
= V4L2_STD_525_60
;
820 strcpy(inp
->name
, "Camera");
825 static int vidioc_g_input(struct file
*file
, void *priv
, unsigned int *i
)
831 static int vidioc_s_input(struct file
*file
, void *priv
, unsigned int i
)
839 /* --- controls ---------------------------------------------- */
840 static int vidioc_queryctrl(struct file
*file
, void *priv
,
841 struct v4l2_queryctrl
*qc
)
845 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
846 if (qc
->id
&& qc
->id
== vivi_qctrl
[i
].id
) {
847 memcpy(qc
, &(vivi_qctrl
[i
]),
855 static int vidioc_g_ctrl(struct file
*file
, void *priv
,
856 struct v4l2_control
*ctrl
)
860 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
861 if (ctrl
->id
== vivi_qctrl
[i
].id
) {
862 ctrl
->value
= qctl_regs
[i
];
868 static int vidioc_s_ctrl(struct file
*file
, void *priv
,
869 struct v4l2_control
*ctrl
)
873 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
874 if (ctrl
->id
== vivi_qctrl
[i
].id
) {
875 if (ctrl
->value
< vivi_qctrl
[i
].minimum
876 || ctrl
->value
> vivi_qctrl
[i
].maximum
) {
879 qctl_regs
[i
] = ctrl
->value
;
885 /* ------------------------------------------------------------------
886 File operations for the device
887 ------------------------------------------------------------------*/
889 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
891 static int vivi_open(struct inode
*inode
, struct file
*file
)
893 int minor
= iminor(inode
);
894 struct vivi_dev
*dev
;
895 struct vivi_fh
*fh
= NULL
;
899 printk(KERN_DEBUG
"vivi: open called (minor=%d)\n", minor
);
901 list_for_each_entry(dev
, &vivi_devlist
, vivi_devlist
)
902 if (dev
->vfd
->minor
== minor
)
907 mutex_lock(&dev
->mutex
);
910 if (dev
->users
> 1) {
916 dprintk(dev
, 1, "open minor=%d type=%s users=%d\n", minor
,
917 v4l2_type_names
[V4L2_BUF_TYPE_VIDEO_CAPTURE
], dev
->users
);
919 /* allocate + initialize per filehandle data */
920 fh
= kzalloc(sizeof(*fh
), GFP_KERNEL
);
927 mutex_unlock(&dev
->mutex
);
931 file
->private_data
= fh
;
934 fh
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
939 /* Put all controls at a sane state */
940 for (i
= 0; i
< ARRAY_SIZE(vivi_qctrl
); i
++)
941 qctl_regs
[i
] = vivi_qctrl
[i
].default_value
;
943 /* Resets frame counters */
949 dev
->jiffies
= jiffies
;
950 sprintf(dev
->timestr
, "%02d:%02d:%02d:%03d",
951 dev
->h
, dev
->m
, dev
->s
, dev
->ms
);
953 videobuf_queue_vmalloc_init(&fh
->vb_vidq
, &vivi_video_qops
,
954 NULL
, &dev
->slock
, fh
->type
, V4L2_FIELD_INTERLACED
,
955 sizeof(struct vivi_buffer
), fh
);
957 vivi_start_thread(fh
);
963 vivi_read(struct file
*file
, char __user
*data
, size_t count
, loff_t
*ppos
)
965 struct vivi_fh
*fh
= file
->private_data
;
967 if (fh
->type
== V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
968 return videobuf_read_stream(&fh
->vb_vidq
, data
, count
, ppos
, 0,
969 file
->f_flags
& O_NONBLOCK
);
975 vivi_poll(struct file
*file
, struct poll_table_struct
*wait
)
977 struct vivi_fh
*fh
= file
->private_data
;
978 struct vivi_dev
*dev
= fh
->dev
;
979 struct videobuf_queue
*q
= &fh
->vb_vidq
;
981 dprintk(dev
, 1, "%s\n", __func__
);
983 if (V4L2_BUF_TYPE_VIDEO_CAPTURE
!= fh
->type
)
986 return videobuf_poll_stream(file
, q
, wait
);
989 static int vivi_close(struct inode
*inode
, struct file
*file
)
991 struct vivi_fh
*fh
= file
->private_data
;
992 struct vivi_dev
*dev
= fh
->dev
;
993 struct vivi_dmaqueue
*vidq
= &dev
->vidq
;
995 int minor
= iminor(inode
);
997 vivi_stop_thread(vidq
);
998 videobuf_stop(&fh
->vb_vidq
);
999 videobuf_mmap_free(&fh
->vb_vidq
);
1003 mutex_lock(&dev
->mutex
);
1005 mutex_unlock(&dev
->mutex
);
1007 dprintk(dev
, 1, "close called (minor=%d, users=%d)\n",
1013 static int vivi_release(void)
1015 struct vivi_dev
*dev
;
1016 struct list_head
*list
;
1018 while (!list_empty(&vivi_devlist
)) {
1019 list
= vivi_devlist
.next
;
1021 dev
= list_entry(list
, struct vivi_dev
, vivi_devlist
);
1023 if (-1 != dev
->vfd
->minor
) {
1024 video_unregister_device(dev
->vfd
);
1025 printk(KERN_INFO
"%s: /dev/video%d unregistered.\n",
1026 VIVI_MODULE_NAME
, dev
->vfd
->minor
);
1028 video_device_release(dev
->vfd
);
1029 printk(KERN_INFO
"%s: /dev/video%d released.\n",
1030 VIVI_MODULE_NAME
, dev
->vfd
->minor
);
1039 static int vivi_mmap(struct file
*file
, struct vm_area_struct
*vma
)
1041 struct vivi_fh
*fh
= file
->private_data
;
1042 struct vivi_dev
*dev
= fh
->dev
;
1045 dprintk(dev
, 1, "mmap called, vma=0x%08lx\n", (unsigned long)vma
);
1047 ret
= videobuf_mmap_mapper(&fh
->vb_vidq
, vma
);
1049 dprintk(dev
, 1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1050 (unsigned long)vma
->vm_start
,
1051 (unsigned long)vma
->vm_end
-(unsigned long)vma
->vm_start
,
1057 static const struct file_operations vivi_fops
= {
1058 .owner
= THIS_MODULE
,
1060 .release
= vivi_close
,
1063 .ioctl
= video_ioctl2
, /* V4L2 ioctl handler */
1064 .compat_ioctl
= v4l_compat_ioctl32
,
1066 .llseek
= no_llseek
,
1069 static struct video_device vivi_template
= {
1071 .type
= VID_TYPE_CAPTURE
,
1074 .release
= video_device_release
,
1076 .vidioc_querycap
= vidioc_querycap
,
1077 .vidioc_enum_fmt_vid_cap
= vidioc_enum_fmt_vid_cap
,
1078 .vidioc_g_fmt_vid_cap
= vidioc_g_fmt_vid_cap
,
1079 .vidioc_try_fmt_vid_cap
= vidioc_try_fmt_vid_cap
,
1080 .vidioc_s_fmt_vid_cap
= vidioc_s_fmt_vid_cap
,
1081 .vidioc_reqbufs
= vidioc_reqbufs
,
1082 .vidioc_querybuf
= vidioc_querybuf
,
1083 .vidioc_qbuf
= vidioc_qbuf
,
1084 .vidioc_dqbuf
= vidioc_dqbuf
,
1085 .vidioc_s_std
= vidioc_s_std
,
1086 .vidioc_enum_input
= vidioc_enum_input
,
1087 .vidioc_g_input
= vidioc_g_input
,
1088 .vidioc_s_input
= vidioc_s_input
,
1089 .vidioc_queryctrl
= vidioc_queryctrl
,
1090 .vidioc_g_ctrl
= vidioc_g_ctrl
,
1091 .vidioc_s_ctrl
= vidioc_s_ctrl
,
1092 .vidioc_streamon
= vidioc_streamon
,
1093 .vidioc_streamoff
= vidioc_streamoff
,
1094 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1095 .vidiocgmbuf
= vidiocgmbuf
,
1097 .tvnorms
= V4L2_STD_525_60
,
1098 .current_norm
= V4L2_STD_NTSC_M
,
1100 /* -----------------------------------------------------------------
1101 Initialization and module stuff
1102 ------------------------------------------------------------------*/
1104 static int __init
vivi_init(void)
1106 int ret
= -ENOMEM
, i
;
1107 struct vivi_dev
*dev
;
1108 struct video_device
*vfd
;
1110 for (i
= 0; i
< n_devs
; i
++) {
1111 dev
= kzalloc(sizeof(*dev
), GFP_KERNEL
);
1115 list_add_tail(&dev
->vivi_devlist
, &vivi_devlist
);
1117 /* init video dma queues */
1118 INIT_LIST_HEAD(&dev
->vidq
.active
);
1119 init_waitqueue_head(&dev
->vidq
.wq
);
1121 /* initialize locks */
1122 spin_lock_init(&dev
->slock
);
1123 mutex_init(&dev
->mutex
);
1125 vfd
= video_device_alloc();
1129 *vfd
= vivi_template
;
1131 ret
= video_register_device(vfd
, VFL_TYPE_GRABBER
, video_nr
);
1135 snprintf(vfd
->name
, sizeof(vfd
->name
), "%s (%i)",
1136 vivi_template
.name
, vfd
->minor
);
1142 printk(KERN_INFO
"%s: V4L2 device registered as /dev/video%d\n",
1143 VIVI_MODULE_NAME
, vfd
->minor
);
1148 printk(KERN_INFO
"Error %d while loading vivi driver\n", ret
);
1150 printk(KERN_INFO
"Video Technology Magazine Virtual Video "
1151 "Capture Board ver %u.%u.%u successfully loaded.\n",
1152 (VIVI_VERSION
>> 16) & 0xFF, (VIVI_VERSION
>> 8) & 0xFF,
1153 VIVI_VERSION
& 0xFF);
1157 static void __exit
vivi_exit(void)
1162 module_init(vivi_init
);
1163 module_exit(vivi_exit
);
1165 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1166 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1167 MODULE_LICENSE("Dual BSD/GPL");
1169 module_param(video_nr
, int, 0);
1170 MODULE_PARM_DESC(video_nr
, "video iminor start number");
1172 module_param(n_devs
, int, 0);
1173 MODULE_PARM_DESC(n_devs
, "number of video devices to create");
1175 module_param_named(debug
, vivi_template
.debug
, int, 0444);
1176 MODULE_PARM_DESC(debug
, "activates debug info");
1178 module_param(vid_limit
, int, 0644);
1179 MODULE_PARM_DESC(vid_limit
, "capture memory limit in megabytes");