NetBSD/sys/dev/radio.c

195 lines
5.0 KiB
C

/* $NetBSD: radio.c,v 1.25 2011/02/23 16:20:30 dyoung Exp $ */
/* $OpenBSD: radio.c,v 1.2 2001/12/05 10:27:06 mickey Exp $ */
/* $RuOBSD: radio.c,v 1.7 2001/12/04 06:03:05 tm Exp $ */
/*
* Copyright (c) 2001 Maxim Tsyplakov <tm@oganer.net>
* 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.
*/
/* This is the /dev/radio driver from OpenBSD */
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: radio.c,v 1.25 2011/02/23 16:20:30 dyoung Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/vnode.h>
#include <sys/radioio.h>
#include <sys/conf.h>
#include <dev/radio_if.h>
struct radio_softc {
void *hw_hdl; /* hardware driver handle */
device_t sc_dev; /* hardware device struct */
const struct radio_hw_if *hw_if; /* hardware interface */
};
static int radioprobe(device_t, cfdata_t, void *);
static void radioattach(device_t, device_t, void *);
static int radioprint(void *, const char *);
static int radiodetach(device_t, int);
CFATTACH_DECL_NEW(radio, sizeof(struct radio_softc),
radioprobe, radioattach, radiodetach, NULL);
static dev_type_open(radioopen);
static dev_type_close(radioclose);
static dev_type_ioctl(radioioctl);
const struct cdevsw radio_cdevsw = {
radioopen, radioclose, noread, nowrite, radioioctl,
nostop, notty, nopoll, nommap, nokqfilter, D_OTHER,
};
extern struct cfdriver radio_cd;
static int
radioprobe(device_t parent, cfdata_t match, void *aux)
{
return (1);
}
static void
radioattach(device_t parent, device_t self, void *aux)
{
struct radio_softc *sc = device_private(self);
struct radio_attach_args *sa = aux;
const struct radio_hw_if *hwp = sa->hwif;
void *hdlp = sa->hdl;
aprint_naive("\n");
aprint_normal("\n");
sc->hw_if = hwp;
sc->hw_hdl = hdlp;
sc->sc_dev = self;
}
static int
radioopen(dev_t dev, int flags, int fmt, struct lwp *l)
{
int unit;
struct radio_softc *sc;
unit = RADIOUNIT(dev);
sc = device_lookup_private(&radio_cd, unit);
if (sc == NULL || sc->hw_if == NULL)
return (ENXIO);
if (sc->hw_if->open != NULL)
return (sc->hw_if->open(sc->hw_hdl, flags, fmt, l->l_proc));
else
return (0);
}
static int
radioclose(dev_t dev, int flags, int fmt, struct lwp *l)
{
struct radio_softc *sc;
sc = device_lookup_private(&radio_cd, RADIOUNIT(dev));
if (sc->hw_if->close != NULL)
return (sc->hw_if->close(sc->hw_hdl, flags, fmt, l->l_proc));
else
return (0);
}
static int
radioioctl(dev_t dev, u_long cmd, void *data, int flags,
struct lwp *l)
{
struct radio_softc *sc;
int unit, error;
unit = RADIOUNIT(dev);
sc = device_lookup_private(&radio_cd, unit);
if (sc == NULL || sc->hw_if == NULL)
return (ENXIO);
error = EOPNOTSUPP;
switch (cmd) {
case RIOCGINFO:
if (sc->hw_if->get_info)
error = (sc->hw_if->get_info)(sc->hw_hdl,
(struct radio_info *)data);
break;
case RIOCSINFO:
if (sc->hw_if->set_info)
error = (sc->hw_if->set_info)(sc->hw_hdl,
(struct radio_info *)data);
break;
case RIOCSSRCH:
if (sc->hw_if->search)
error = (sc->hw_if->search)(sc->hw_hdl,
*(int *)data);
break;
default:
error = EINVAL;
}
return (error);
}
/*
* Called from hardware driver. This is where the MI radio driver gets
* probed/attached to the hardware driver
*/
device_t
radio_attach_mi(const struct radio_hw_if *rhwp, void *hdlp, device_t dev)
{
struct radio_attach_args arg;
arg.hwif = rhwp;
arg.hdl = hdlp;
return (config_found(dev, &arg, radioprint));
}
static int
radioprint(void *aux, const char *pnp)
{
if (pnp != NULL)
aprint_normal("radio at %s", pnp);
return (UNCONF);
}
static int
radiodetach(device_t self, int flags)
{
int maj, mn;
/* locate the major number */
maj = cdevsw_lookup_major(&radio_cdevsw);
/* Nuke the vnodes for any open instances (calls close). */
mn = device_unit(self);
vdevgone(maj, mn, mn, VCHR);
return (0);
}