Initial import for uvideo(4) and video(4):

uvideo(4) is a driver for USB video device class devices including webcams,
camcorders and other cameras.

video(4) is a device-independent layer that implements the V4L2 (Video for Linux Two)
API.

These drivers are *really* work in progress so don't even try to use them just yet,
because the driver still has some issues, even if it can be used to capture simple
MJPEG videos.

ok mglocker@, deraadt@

1 files changed, 199 insertions, 0 deletions

diff --git a/sys/dev/video.c b/sys/dev/video.c
new file mode 100644
index 00000000000..75a19eaa5f8
--- /dev/null
+++ b/sys/dev/video.c
@@ -0,0 +1,199 @@
+/*	$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);
+}