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/* $NetBSD: hdmicec.c,v 1.2 2017/10/28 04:53:56 riastradh Exp $ */
/*-
* Copyright (c) 2015 Jared D. McNeill <jmcneill@invisible.ca>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: hdmicec.c,v 1.2 2017/10/28 04:53:56 riastradh Exp $");
#include <sys/param.h>
#include <sys/types.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/atomic.h>
#include <dev/hdmicec/hdmicec_if.h>
#include <dev/hdmicec/hdmicecio.h>
#include "ioconf.h"
#define CEC_MAX_FRAMESIZE 16
struct hdmicec_softc {
device_t sc_dev;
void * sc_priv;
const struct hdmicec_hw_if *sc_hwif;
u_int sc_busy;
};
static dev_type_open(hdmicec_open);
static dev_type_close(hdmicec_close);
static dev_type_read(hdmicec_read);
static dev_type_write(hdmicec_write);
static dev_type_ioctl(hdmicec_ioctl);
static dev_type_poll(hdmicec_poll);
static int hdmicec_match(device_t, cfdata_t, void *);
static void hdmicec_attach(device_t, device_t, void *);
const struct cdevsw hdmicec_cdevsw = {
.d_open = hdmicec_open,
.d_close = hdmicec_close,
.d_read = hdmicec_read,
.d_write = hdmicec_write,
.d_ioctl = hdmicec_ioctl,
.d_stop = nostop,
.d_tty = notty,
.d_poll = hdmicec_poll,
.d_mmap = nommap,
.d_kqfilter = nokqfilter,
.d_flag = D_MPSAFE
};
CFATTACH_DECL_NEW(hdmicec, sizeof(struct hdmicec_softc), hdmicec_match,
hdmicec_attach, NULL, NULL);
static int
hdmicec_match(device_t parent, cfdata_t match, void *opaque)
{
return 1;
}
static void
hdmicec_attach(device_t parent, device_t self, void *opaque)
{
struct hdmicec_softc *sc = device_private(self);
struct hdmicec_attach_args *caa = opaque;
sc->sc_dev = self;
sc->sc_priv = caa->priv;
sc->sc_hwif = caa->hwif;
aprint_naive("\n");
aprint_normal("\n");
}
static int
hdmicec_open(dev_t dev, int flag, int fmt, lwp_t *l)
{
struct hdmicec_softc *sc =
device_lookup_private(&hdmicec_cd, minor(dev));
int error;
if (sc == NULL)
return ENXIO;
if (atomic_cas_uint(&sc->sc_busy, 0, 1) != 1)
return EBUSY;
if (sc->sc_hwif->open != NULL) {
error = sc->sc_hwif->open(sc->sc_priv, flag);
if (error) {
atomic_swap_uint(&sc->sc_busy, 0);
return error;
}
}
return 0;
}
static int
hdmicec_close(dev_t dev, int flag, int fmt, lwp_t *l)
{
struct hdmicec_softc *sc =
device_lookup_private(&hdmicec_cd, minor(dev));
if (sc->sc_hwif->close)
sc->sc_hwif->close(sc->sc_priv);
atomic_swap_uint(&sc->sc_busy, 0);
return 0;
}
static int
hdmicec_read(dev_t dev, struct uio *uio, int flags)
{
struct hdmicec_softc *sc =
device_lookup_private(&hdmicec_cd, minor(dev));
uint8_t data[CEC_MAX_FRAMESIZE];
ssize_t len;
int error;
if (uio->uio_resid < CEC_MAX_FRAMESIZE)
return EINVAL;
len = sc->sc_hwif->recv(sc->sc_priv, data, sizeof(data));
if (len < 0)
return EIO;
error = uiomove(data, len, uio);
if (error)
return error;
return 0;
}
static int
hdmicec_write(dev_t dev, struct uio *uio, int flags)
{
struct hdmicec_softc *sc =
device_lookup_private(&hdmicec_cd, minor(dev));
uint8_t data[CEC_MAX_FRAMESIZE];
size_t len = uio->uio_resid;
int error;
if (len > CEC_MAX_FRAMESIZE)
return EINVAL;
error = uiomove(data, len, uio);
if (error)
return error;
return sc->sc_hwif->send(sc->sc_priv, data, len);
}
static int
hdmicec_ioctl(dev_t dev, u_long cmd, void *data, int flag, lwp_t *l)
{
struct hdmicec_softc *sc =
device_lookup_private(&hdmicec_cd, minor(dev));
return sc->sc_hwif->ioctl(sc->sc_priv, cmd, data, flag, l);
}
static int
hdmicec_poll(dev_t dev, int events, lwp_t *l)
{
struct hdmicec_softc *sc =
device_lookup_private(&hdmicec_cd, minor(dev));
return sc->sc_hwif->poll(sc->sc_priv, events, l);
}
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