198 lines
5.3 KiB
C
198 lines
5.3 KiB
C
/* $NetBSD: mgnsc.c,v 1.26 1998/01/12 10:40:01 thorpej Exp $ */
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/*
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* Copyright (c) 1994 Michael L. Hitch
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* Copyright (c) 1982, 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)dma.c
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <dev/scsipi/scsi_all.h>
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#include <dev/scsipi/scsipi_all.h>
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#include <dev/scsipi/scsiconf.h>
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#include <amiga/amiga/custom.h>
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#include <amiga/amiga/cc.h>
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#include <amiga/amiga/device.h>
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#include <amiga/amiga/isr.h>
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#include <amiga/dev/siopreg.h>
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#include <amiga/dev/siopvar.h>
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#include <amiga/dev/zbusvar.h>
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void mgnscattach __P((struct device *, struct device *, void *));
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int mgnscmatch __P((struct device *, struct cfdata *, void *));
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int mgnsc_dmaintr __P((void *));
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#ifdef DEBUG
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void mgnsc_dump __P((void));
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#endif
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struct scsipi_adapter mgnsc_scsiswitch = {
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siop_scsicmd,
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siop_minphys,
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0, /* no lun support */
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0, /* no lun support */
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};
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struct scsipi_device mgnsc_scsidev = {
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NULL, /* use default error handler */
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NULL, /* do not have a start functio */
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NULL, /* have no async handler */
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NULL, /* Use default done routine */
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};
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#ifdef DEBUG
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#endif
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struct cfattach mgnsc_ca = {
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sizeof(struct siop_softc), mgnscmatch, mgnscattach
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};
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/*
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* if we are a CSA Magnum 40 SCSI
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*/
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int
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mgnscmatch(pdp, cfp, auxp)
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struct device *pdp;
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struct cfdata *cfp;
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void *auxp;
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{
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struct zbus_args *zap;
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zap = auxp;
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if (zap->manid == 1058 && zap->prodid == 17)
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return(1);
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return(0);
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}
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void
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mgnscattach(pdp, dp, auxp)
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struct device *pdp, *dp;
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void *auxp;
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{
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struct siop_softc *sc;
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struct zbus_args *zap;
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siop_regmap_p rp;
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printf("\n");
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zap = auxp;
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sc = (struct siop_softc *)dp;
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sc->sc_siopp = rp = zap->va + 0x8000;
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/*
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* CTEST7 = TT1
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*/
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sc->sc_clock_freq = 33; /* Clock = 33Mhz */
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sc->sc_ctest7 = SIOP_CTEST7_TT1;
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sc->sc_dcntl = 0x00;
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alloc_sicallback();
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sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE;
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sc->sc_link.adapter_softc = sc;
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sc->sc_link.scsipi_scsi.adapter_target = 7;
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sc->sc_link.adapter = &mgnsc_scsiswitch;
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sc->sc_link.device = &mgnsc_scsidev;
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sc->sc_link.openings = 2;
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sc->sc_link.scsipi_scsi.max_target = 7;
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sc->sc_link.type = BUS_SCSI;
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siopinitialize(sc);
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sc->sc_isr.isr_intr = mgnsc_dmaintr;
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sc->sc_isr.isr_arg = sc;
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sc->sc_isr.isr_ipl = 6;
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add_isr (&sc->sc_isr);
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/*
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* attach all scsi units on us
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*/
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config_found(dp, &sc->sc_link, scsiprint);
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}
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/*
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* Level 6 interrupt processing for the Magnum/40 SCSI. Because the
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* level 6 interrupt is above splbio, the interrupt status is saved
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* and an sicallback to the level 2 interrupt handler scheduled.
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* This way, the actual processing of the interrupt can be deferred
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* until splbio is unblocked.
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*/
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int
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mgnsc_dmaintr(arg)
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void *arg;
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{
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struct siop_softc *sc = arg;
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siop_regmap_p rp;
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u_char istat;
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if (sc->sc_flags & SIOP_INTSOFF)
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return (0); /* interrupts are not active */
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rp = sc->sc_siopp;
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istat = rp->siop_istat;
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if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0)
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return (0);
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/*
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* save interrupt status, DMA status, and SCSI status 0
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* (may need to deal with stacked interrupts?)
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*/
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sc->sc_sstat0 = rp->siop_sstat0;
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sc->sc_istat = istat;
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sc->sc_dstat = rp->siop_dstat;
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/*
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* disable interrupts until the callback can process this
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* interrupt.
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*/
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rp->siop_sien = 0;
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rp->siop_dien = 0;
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sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF;
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add_sicallback((sifunc_t)siopintr, sc, NULL);
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return (1);
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}
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#ifdef DEBUG
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void
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mgnsc_dump()
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{
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extern struct cfdriver mgnsc_cd;
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int i;
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for (i = 0; i < mgnsc_cd.cd_ndevs; ++i)
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if (mgnsc_cd.cd_devs[i])
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siop_dump(mgnsc_cd.cd_devs[i]);
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}
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#endif
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