/* $OpenBSD: uk.c,v 1.6 1997/08/31 07:41:53 downsj 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 __P((struct device *, void *, void *)); void ukattach __P((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); }