184 lines
5.0 KiB
C
184 lines
5.0 KiB
C
/* $NetBSD: mgnsc.c,v 1.12 1995/04/02 20:38:53 chopps 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 <scsi/scsi_all.h>
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#include <scsi/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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int mgnscprint __P((void *auxp, char *));
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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 siopintr __P((struct siop_softc *));
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int mgnsc_dmaintr __P((struct siop_softc *));
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struct scsi_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 scsi_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 cfdriver mgnsccd = {
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NULL, "mgnsc", (cfmatch_t)mgnscmatch, mgnscattach,
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DV_DULL, sizeof(struct siop_softc), NULL, 0 };
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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, cdp, auxp)
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struct device *pdp;
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struct cfdata *cdp;
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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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* DCNTL = 25.01->37.5MHZ / SCLK/1.5
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* CTEST7 = TT1
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*/
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sc->sc_clock_freq = 0x0240;
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alloc_sicallback();
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siopinitialize(sc);
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sc->sc_link.adapter_softc = sc;
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sc->sc_link.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 = 1;
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TAILQ_INIT(&sc->sc_xslist);
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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, mgnscprint);
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}
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/*
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* print diag if pnp is NULL else just extra
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*/
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int
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mgnscprint(auxp, pnp)
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void *auxp;
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char *pnp;
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{
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if (pnp == NULL)
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return(UNCONF);
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return(QUIET);
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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(sc)
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struct siop_softc *sc;
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{
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siop_regmap_p rp;
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u_char istat;
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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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if ((rp->siop_sien | rp->siop_dien) == 0)
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return(0); /* no interrupts enabled */
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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_istat = istat;
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sc->sc_dstat = rp->siop_dstat;
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sc->sc_sstat0 = rp->siop_sstat0;
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add_sicallback (siopintr, sc, NULL);
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return (1);
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}
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