NetBSD/sys/dev/scsipi/uk.c

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/* $NetBSD: uk.c,v 1.27 1998/12/08 00:19:28 thorpej Exp $ */
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/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum.
*
* 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:
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* 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.
*
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* 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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* Dummy driver for a device we can't identify.
* Originally by Julian Elischer (julian@tfs.com)
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*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
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#include <sys/errno.h>
#include <sys/ioctl.h>
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#include <sys/device.h>
#include <sys/conf.h>
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#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
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#define UKUNIT(z) (minor(z))
struct uk_softc {
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struct device sc_dev;
struct scsipi_link *sc_link; /* all the inter level info */
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};
int ukmatch __P((struct device *, struct cfdata *, void *));
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void ukattach __P((struct device *, struct device *, void *));
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struct cfattach uk_scsibus_ca = {
sizeof(struct uk_softc), ukmatch, ukattach
};
struct cfattach uk_atapibus_ca = {
sizeof(struct uk_softc), ukmatch, ukattach
};
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extern struct cfdriver uk_cd;
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/*
* This driver is so simple it uses all the default services
*/
struct scsipi_device uk_switch = {
NULL,
NULL,
NULL,
NULL,
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};
cdev_decl(uk);
int
ukmatch(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
return (1);
}
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/*
* The routine called by the low level scsi routine when it discovers
* a device suitable for this driver.
*/
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void
ukattach(parent, self, aux)
struct device *parent, *self;
void *aux;
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{
struct uk_softc *uk = (void *)self;
struct scsipibus_attach_args *sa = aux;
struct scsipi_link *sc_link = sa->sa_sc_link;
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SC_DEBUG(sc_link, SDEV_DB2, ("ukattach: "));
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/*
* Store information needed to contact our base driver
*/
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uk->sc_link = sc_link;
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sc_link->device = &uk_switch;
sc_link->device_softc = uk;
sc_link->openings = 1;
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printf("\n");
printf("%s: unknown device\n", uk->sc_dev.dv_xname);
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}
/*
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* open the device.
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*/
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int
ukopen(dev, flag, fmt, p)
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dev_t dev;
int flag, fmt;
struct proc *p;
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{
int unit, error;
struct uk_softc *uk;
struct scsipi_link *sc_link;
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unit = UKUNIT(dev);
if (unit >= uk_cd.cd_ndevs)
return (ENXIO);
uk = uk_cd.cd_devs[unit];
if (uk == NULL)
return (ENXIO);
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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));
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/*
* Only allow one at a time
*/
if (sc_link->flags & SDEV_OPEN) {
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printf("%s: already open\n", uk->sc_dev.dv_xname);
return (EBUSY);
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}
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if ((error = scsipi_adapter_addref(sc_link)) != 0)
return (error);
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sc_link->flags |= SDEV_OPEN;
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SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n"));
return (0);
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}
/*
* close the device.. only called if we are the LAST
* occurence of an open device
*/
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int
ukclose(dev, flag, fmt, p)
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dev_t dev;
int flag, fmt;
struct proc *p;
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{
struct uk_softc *uk = uk_cd.cd_devs[UKUNIT(dev)];
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SC_DEBUG(uk->sc_link, SDEV_DB1, ("closing\n"));
scsipi_wait_drain(uk->sc_link);
scsipi_adapter_delref(uk->sc_link);
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uk->sc_link->flags &= ~SDEV_OPEN;
return (0);
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}
/*
* Perform special action on behalf of the user
* Only does generic scsi ioctls.
*/
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int
ukioctl(dev, cmd, addr, flag, p)
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dev_t dev;
u_long cmd;
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caddr_t addr;
int flag;
struct proc *p;
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{
register struct uk_softc *uk = uk_cd.cd_devs[UKUNIT(dev)];
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return (scsipi_do_ioctl(uk->sc_link, dev, cmd, addr, flag, p));
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}