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/* $OpenBSD: video.c,v 1.1 2008/04/09 19:49:55 robert Exp $ */
/*
* Copyright (c) 2008 Robert Nagy <robert@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/fcntl.h>
#include <sys/device.h>
#include <sys/vnode.h>
#include <sys/conf.h>
#include <sys/videoio.h>
#include <dev/video_if.h>
#include <dev/videovar.h>
#define DPRINTF(x) do { printf x; } while (0)
int videoprobe(struct device *, void *, void *);
void videoattach(struct device *, struct device *, void *);
int videodetach(struct device *, int);
int videoactivate(struct device *, enum devact);
int videoprint(void *, const char *);
struct cfattach video_ca = {
sizeof(struct video_softc), videoprobe, videoattach,
videodetach, videoactivate
};
struct cfdriver video_cd = {
NULL, "video", DV_DULL
};
int
videoprobe(struct device *parent, void *match, void *aux)
{
return (1);
}
void
videoattach(struct device *parent, struct device *self, void *aux)
{
struct video_softc *sc = (void *) self;
struct video_attach_args *sa = aux;
printf("\n");
sc->hw_if = sa->hwif;
sc->hw_hdl = sa->hdl;
sc->sc_dev = parent;
}
int
videoopen(dev_t dev, int flags, int fmt, struct proc *p)
{
int unit;
struct video_softc *sc;
unit = VIDEOUNIT(dev);
if (unit >= video_cd.cd_ndevs ||
(sc = video_cd.cd_devs[unit]) == NULL ||
sc->hw_if == NULL)
return (ENXIO);
if (sc->hw_if->open != NULL)
return (sc->hw_if->open(sc->hw_hdl, flags));
else
return (0);
}
int
videoclose(dev_t dev, int flags, int fmt, struct proc *p)
{
struct video_softc *sc;
sc = video_cd.cd_devs[VIDEOUNIT(dev)];
if (sc->hw_if->close != NULL)
return (sc->hw_if->close(sc->hw_hdl));
else
return (0);
}
int
videoioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p)
{
struct video_softc *sc;
int unit, error;
unit = VIDEOUNIT(dev);
if (unit >= video_cd.cd_ndevs ||
(sc = video_cd.cd_devs[unit]) == NULL || sc->hw_if == NULL)
return (ENXIO);
DPRINTF(("video_ioctl(%d, '%c', %d)\n",
IOCPARM_LEN(cmd), IOCGROUP(cmd), cmd & 0xff));
error = EOPNOTSUPP;
switch (cmd) {
case VIDIOC_QUERYCAP:
if (sc->hw_if->querycap)
error = (sc->hw_if->querycap)(sc->hw_hdl,
(struct v4l2_capability *)data);
break;
case VIDIOC_S_FMT:
if (!(flags & FWRITE))
return (EACCES);
if (sc->hw_if->s_fmt)
error = (sc->hw_if->s_fmt)(sc->hw_hdl,
(struct v4l2_format *)data);
break;
case VIDIOC_G_FMT:
if (sc->hw_if->g_fmt)
error = (sc->hw_if->g_fmt)(sc->hw_hdl,
(struct v4l2_format *)data);
break;
case VIDIOC_REQBUFS:
if (sc->hw_if->reqbufs)
error = (sc->hw_if->reqbufs)(sc->hw_hdl,
(struct v4l2_requestbuffers *)data);
break;
case VIDIOC_QUERYBUF:
case VIDIOC_QBUF:
default:
error = (ENOTTY);
}
return (error);
}
/*
* Called from hardware driver. This is where the MI video driver gets
* probed/attached to the hardware driver
*/
struct device *
video_attach_mi(struct video_hw_if *rhwp, void *hdlp, struct device *dev)
{
struct video_attach_args arg;
arg.hwif = rhwp;
arg.hdl = hdlp;
return (config_found(dev, &arg, videoprint));
}
int
videoprint(void *aux, const char *pnp)
{
if (pnp != NULL)
printf("video at %s", pnp);
return (UNCONF);
}
int
videodetach(struct device *self, int flags)
{
/*struct video_softc *sc = (struct video_softc *)self;*/
int maj, mn;
/* locate the major number */
for (maj = 0; maj < nchrdev; maj++)
if (cdevsw[maj].d_open == videoopen)
break;
/* Nuke the vnodes for any open instances (calls close). */
mn = self->dv_unit;
vdevgone(maj, mn, mn, VCHR);
return (0);
}
int
videoactivate(struct device *self, enum devact act)
{
struct video_softc *sc = (struct video_softc *)self;
switch (act) {
case DVACT_ACTIVATE:
break;
case DVACT_DEACTIVATE:
sc->sc_dying = 1;
break;
}
return (0);
}
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