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/* $OpenBSD: uk.c,v 1.24 2019/12/07 15:16:24 krw Exp $ */
/* $NetBSD: uk.c,v 1.15 1996/03/17 00:59:57 thorpej Exp $ */
/*
* Copyright (c) 1994 Charles Hannum. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles Hannum.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*/
/*
* Dummy driver for a device we can't identify.
* Originally by Julian Elischer (julian@tfs.com)
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/vnode.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#define UKUNIT(z) (minor(z))
struct uk_softc {
struct device sc_dev;
struct scsi_link *sc_link; /* all the inter level info */
};
int ukmatch(struct device *, void *, void *);
void ukattach(struct device *, struct device *, void *);
int ukdetach(struct device *, int);
struct cfattach uk_ca = {
sizeof(struct uk_softc), ukmatch, ukattach, ukdetach
};
struct cfdriver uk_cd = {
NULL, "uk", DV_DULL
};
#define uklookup(unit) (struct uk_softc *)device_lookup(&uk_cd, (unit))
int
ukmatch(struct device *parent, void *match, void *aux)
{
return 1;
}
/*
* The routine called by the low level scsi routine when it discovers
* a device suitable for this driver.
*/
void
ukattach(struct device *parent, struct device *self, void *aux)
{
struct uk_softc *sc = (void *)self;
struct scsi_attach_args *sa = aux;
struct scsi_link *link = sa->sa_sc_link;
SC_DEBUG(link, SDEV_DB2, ("ukattach: "));
/* Store information needed to contact our base driver. */
sc->sc_link = link;
link->device_softc = sc;
link->openings = 1;
printf("\n");
}
int
ukdetach(struct device *self, int flags)
{
int bmaj, cmaj, mn;
mn = self->dv_unit;
for (bmaj = 0; bmaj < nblkdev; bmaj++)
if (bdevsw[bmaj].d_open == ukopen)
vdevgone(bmaj, mn, mn, VBLK);
for (cmaj = 0; cmaj < nchrdev; cmaj++)
if (cdevsw[cmaj].d_open == ukopen)
vdevgone(cmaj, mn, mn, VCHR);
return 0;
}
/*
* Open the device.
*/
int
ukopen(dev_t dev, int flag, int fmt, struct proc *p)
{
struct uk_softc *sc;
struct scsi_link *link;
int unit;
unit = UKUNIT(dev);
sc = uklookup(unit);
if (sc == NULL)
return ENXIO;
link = sc->sc_link;
SC_DEBUG(link, SDEV_DB1, ("ukopen: dev=0x%x (unit %d (of %d))\n",
dev, unit, uk_cd.cd_ndevs));
/* Only allow one at a time. */
if (ISSET(link->flags, SDEV_OPEN)) {
device_unref(&sc->sc_dev);
return EBUSY;
}
SET(link->flags, SDEV_OPEN);
SC_DEBUG(link, SDEV_DB3, ("open complete\n"));
device_unref(&sc->sc_dev);
return 0;
}
/*
* Close the device. Called only if we are the LAST
* occurrence of an open device.
*/
int
ukclose(dev_t dev, int flag, int fmt, struct proc *p)
{
struct uk_softc *sc;
sc = uklookup(UKUNIT(dev));
if (sc == NULL)
return ENXIO;
SC_DEBUG(sc->sc_link, SDEV_DB1, ("closing\n"));
CLR(sc->sc_link->flags, SDEV_OPEN);
device_unref(&sc->sc_dev);
return 0;
}
/*
* Perform special action on behalf of the user
* Only does generic scsi ioctls.
*/
int
ukioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
{
struct uk_softc *sc;
int rv;
sc = uklookup(UKUNIT(dev));
if (sc == NULL)
return ENXIO;
rv = scsi_do_ioctl(sc->sc_link, cmd, addr, flag);
device_unref(&sc->sc_dev);
return rv;
}
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