NetBSD/sys/dev/ir/cir.c

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2003-07-14 19:47:00 +04:00
/* $NetBSD: cir.c,v 1.9 2003/07/14 15:47:14 lukem Exp $ */
/*
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Lennart Augustsson (lennart@augustsson.net).
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
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#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: cir.c,v 1.9 2003/07/14 15:47:14 lukem Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/poll.h>
#include <sys/select.h>
#include <sys/vnode.h>
#include <dev/ir/ir.h>
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#include <dev/ir/cirio.h>
#include <dev/ir/cirvar.h>
dev_type_open(ciropen);
dev_type_close(circlose);
dev_type_read(cirread);
dev_type_write(cirwrite);
dev_type_ioctl(cirioctl);
dev_type_poll(cirpoll);
dev_type_kqfilter(cirkqfilter);
const struct cdevsw cir_cdevsw = {
ciropen, circlose, cirread, cirwrite, cirioctl,
nostop, notty, cirpoll, nommap, cirkqfilter,
};
int cir_match(struct device *parent, struct cfdata *match, void *aux);
void cir_attach(struct device *parent, struct device *self, void *aux);
int cir_activate(struct device *self, enum devact act);
int cir_detach(struct device *self, int flags);
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CFATTACH_DECL(cir, sizeof(struct cir_softc),
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cir_match, cir_attach, cir_detach, cir_activate);
extern struct cfdriver cir_cd;
#define CIRUNIT(dev) (minor(dev))
int
cir_match(struct device *parent, struct cfdata *match, void *aux)
{
struct ir_attach_args *ia = aux;
return (ia->ia_type == IR_TYPE_CIR);
}
void
cir_attach(struct device *parent, struct device *self, void *aux)
{
struct cir_softc *sc = (struct cir_softc *)self;
struct ir_attach_args *ia = aux;
sc->sc_methods = ia->ia_methods;
sc->sc_handle = ia->ia_handle;
#ifdef DIAGNOSTIC
if (sc->sc_methods->im_read == NULL ||
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sc->sc_methods->im_write == NULL ||
sc->sc_methods->im_setparams == NULL)
panic("%s: missing methods", sc->sc_dev.dv_xname);
#endif
printf("\n");
}
int
cir_activate(struct device *self, enum devact act)
{
/*struct cir_softc *sc = (struct cir_softc *)self;*/
switch (act) {
case DVACT_ACTIVATE:
return (EOPNOTSUPP);
break;
case DVACT_DEACTIVATE:
break;
}
return (0);
}
int
cir_detach(struct device *self, int flags)
{
/*struct cir_softc *sc = (struct cir_softc *)self;*/
int maj, mn;
/* locate the major number */
maj = cdevsw_lookup_major(&cir_cdevsw);
/* Nuke the vnodes for any open instances (calls close). */
mn = self->dv_unit;
vdevgone(maj, mn, mn, VCHR);
return (0);
}
int
ciropen(dev_t dev, int flag, int mode, struct proc *p)
{
struct cir_softc *sc;
int error;
sc = device_lookup(&cir_cd, CIRUNIT(dev));
if (sc == NULL)
return (ENXIO);
if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
return (EIO);
if (sc->sc_open)
return (EBUSY);
if (sc->sc_methods->im_open != NULL) {
error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, p);
if (error)
return (error);
}
sc->sc_open = 1;
return (0);
}
int
circlose(dev_t dev, int flag, int mode, struct proc *p)
{
struct cir_softc *sc;
int error;
sc = device_lookup(&cir_cd, CIRUNIT(dev));
if (sc == NULL)
return (ENXIO);
if (sc->sc_methods->im_close != NULL)
error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, p);
else
error = 0;
sc->sc_open = 0;
return (error);
}
int
cirread(dev_t dev, struct uio *uio, int flag)
{
struct cir_softc *sc;
sc = device_lookup(&cir_cd, CIRUNIT(dev));
if (sc == NULL)
return (ENXIO);
if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
return (EIO);
return (sc->sc_methods->im_read(sc->sc_handle, uio, flag));
}
int
cirwrite(dev_t dev, struct uio *uio, int flag)
{
struct cir_softc *sc;
sc = device_lookup(&cir_cd, CIRUNIT(dev));
if (sc == NULL)
return (ENXIO);
if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
return (EIO);
return (sc->sc_methods->im_write(sc->sc_handle, uio, flag));
}
int
cirioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
{
struct cir_softc *sc;
int error;
sc = device_lookup(&cir_cd, CIRUNIT(dev));
if (sc == NULL)
return (ENXIO);
if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
return (EIO);
switch (cmd) {
case FIONBIO:
/* All handled in the upper FS layer. */
error = 0;
break;
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case CIR_GET_PARAMS:
*(struct cir_params *)addr = sc->sc_params;
break;
case CIR_SET_PARAMS:
error = sc->sc_methods->im_setparams(sc->sc_handle,
(struct cir_params *)addr);
if (!error)
sc->sc_params = *(struct cir_params *)addr;
break;
default:
error = EINVAL;
break;
}
return (error);
}
int
cirpoll(dev_t dev, int events, struct proc *p)
{
struct cir_softc *sc;
int revents;
int s;
sc = device_lookup(&cir_cd, CIRUNIT(dev));
if (sc == NULL)
return (ENXIO);
if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
return (EIO);
revents = 0;
s = splir();
#if 0
if (events & (POLLIN | POLLRDNORM))
if (sc->sc_rdframes > 0)
revents |= events & (POLLIN | POLLRDNORM);
#endif
#if 0
/* How about write? */
if (events & (POLLOUT | POLLWRNORM))
if (???)
revents |= events & (POLLOUT | POLLWRNORM);
#endif
if (revents == 0) {
if (events & (POLLIN | POLLRDNORM))
selrecord(p, &sc->sc_rdsel);
#if 0
if (events & (POLLOUT | POLLWRNORM))
selrecord(p, &sc->sc_wrsel);
#endif
}
splx(s);
return (revents);
}