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/* $OpenBSD: uk.c,v 1.7 2002/03/14 01:27:13 millert 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/types.h>
#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 <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 *);
struct cfattach uk_ca = {
sizeof(struct uk_softc), ukmatch, ukattach
};
struct cfdriver uk_cd = {
NULL, "uk", DV_DULL
};
/*
* This driver is so simple it uses all the default services
*/
struct scsi_device uk_switch = {
NULL,
NULL,
NULL,
NULL,
};
int
ukmatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
return 1;
}
/*
* The routine called by the low level scsi routine when it discovers
* a device suitable for this driver.
*/
void
ukattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct uk_softc *uk = (void *)self;
struct scsibus_attach_args *sa = aux;
struct scsi_link *sc_link = sa->sa_sc_link;
SC_DEBUG(sc_link, SDEV_DB2, ("ukattach: "));
/*
* Store information needed to contact our base driver
*/
uk->sc_link = sc_link;
sc_link->device = &uk_switch;
sc_link->device_softc = uk;
sc_link->openings = 1;
printf("\n");
printf("%s: unknown device\n", uk->sc_dev.dv_xname);
}
/*
* open the device.
*/
int
ukopen(dev, flag, fmt, p)
dev_t dev;
int flag, fmt;
struct proc *p;
{
int unit;
struct uk_softc *uk;
struct scsi_link *sc_link;
unit = UKUNIT(dev);
if (unit >= uk_cd.cd_ndevs)
return ENXIO;
uk = uk_cd.cd_devs[unit];
if (!uk)
return ENXIO;
sc_link = uk->sc_link;
SC_DEBUG(sc_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 (sc_link->flags & SDEV_OPEN) {
printf("%s: already open\n", uk->sc_dev.dv_xname);
return EBUSY;
}
sc_link->flags |= SDEV_OPEN;
SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n"));
return 0;
}
/*
* close the device.. only called if we are the LAST
* occurence of an open device
*/
int
ukclose(dev, flag, fmt, p)
dev_t dev;
int flag, fmt;
struct proc *p;
{
struct uk_softc *uk = uk_cd.cd_devs[UKUNIT(dev)];
SC_DEBUG(uk->sc_link, SDEV_DB1, ("closing\n"));
uk->sc_link->flags &= ~SDEV_OPEN;
return 0;
}
/*
* Perform special action on behalf of the user
* Only does generic scsi ioctls.
*/
int
ukioctl(dev, cmd, addr, flag, p)
dev_t dev;
u_long cmd;
caddr_t addr;
int flag;
struct proc *p;
{
register struct uk_softc *uk = uk_cd.cd_devs[UKUNIT(dev)];
return scsi_do_ioctl(uk->sc_link, dev, cmd, addr, flag, p);
}
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