244 lines
6.9 KiB
C
244 lines
6.9 KiB
C
/* $NetBSD: drsc.c,v 1.27 2004/03/28 18:59:39 mhitch Exp $ */
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/*
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* Copyright (c) 1996 Ignatios Souvatzis
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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. 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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/*
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* Copyright (c) 1994 Michael L. Hitch
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @(#)dma.c
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: drsc.c,v 1.27 2004/03/28 18:59:39 mhitch Exp $");
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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 <uvm/uvm_extern.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/amiga/drcustom.h>
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#include <machine/cpu.h> /* is_xxx(), */
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void drscattach(struct device *, struct device *, void *);
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int drscmatch(struct device *, struct cfdata *, void *);
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int drsc_dmaintr(struct siop_softc *);
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#ifdef DEBUG
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void drsc_dump(void);
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#endif
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#ifdef DEBUG
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#endif
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CFATTACH_DECL(drsc, sizeof(struct siop_softc),
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drscmatch, drscattach, NULL, NULL);
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static struct siop_softc *drsc_softc;
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/*
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* One of us is on every DraCo motherboard,
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*/
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int
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drscmatch(struct device *pdp, struct cfdata *cfp, void *auxp)
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{
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static int drsc_matched = 0;
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/* Allow only one instance. */
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if (!is_draco() || !matchname(auxp, "drsc") || drsc_matched)
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return (0);
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drsc_matched = 1;
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return(1);
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}
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void
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drscattach(struct device *pdp, struct device *dp, void *auxp)
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{
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struct siop_softc *sc = (struct siop_softc *)dp;
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struct zbus_args *zap;
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siop_regmap_p rp;
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struct scsipi_adapter *adapt = &sc->sc_adapter;
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struct scsipi_channel *chan = &sc->sc_channel;
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printf("\n");
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zap = auxp;
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sc->sc_siopp = rp = (siop_regmap_p)(DRCCADDR+PAGE_SIZE*DRSCSIPG);
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/*
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* CTEST7 = TT1
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*/
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sc->sc_clock_freq = 50; /* Clock = 50MHz */
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sc->sc_ctest7 = 0x02;
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alloc_sicallback();
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/*
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* Fill in the scsipi_adapter.
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*/
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memset(adapt, 0, sizeof(*adapt));
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adapt->adapt_dev = &sc->sc_dev;
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adapt->adapt_nchannels = 1;
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adapt->adapt_openings = 7;
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adapt->adapt_max_periph = 1;
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adapt->adapt_request = siop_scsipi_request;
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adapt->adapt_minphys = siop_minphys;
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/*
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* Fill in the scsipi_channel.
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*/
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memset(chan, 0, sizeof(*chan));
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chan->chan_adapter = adapt;
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chan->chan_bustype = &scsi_bustype;
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chan->chan_channel = 0;
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chan->chan_ntargets = 8;
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chan->chan_nluns = 8;
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chan->chan_id = 7;
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siopinitialize(sc);
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#if 0
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sc->sc_isr.isr_intr = drsc_dmaintr;
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sc->sc_isr.isr_arg = sc;
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sc->sc_isr.isr_ipl = 4;
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add_isr(&sc->sc_isr);
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#else
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drsc_softc = sc;
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single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI);
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single_inst_bset_b(*draco_intena, DRIRQ_SCSI);
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#endif
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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, chan, scsiprint);
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}
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/*
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* Level 4 interrupt processing for the MacroSystem DraCo mainboard
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* SCSI. Because the level 4 interrupt is above splbio, the
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* interrupt status is saved and an sicallback to the level 2 interrupt
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* handler scheduled. This way, the actual processing of the interrupt
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* can be deferred until splbio is unblocked.
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*/
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void
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drsc_handler(void)
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{
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struct siop_softc *sc = drsc_softc;
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siop_regmap_p rp;
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int istat;
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if (sc->sc_flags & SIOP_INTSOFF)
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return; /* 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;
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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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#ifdef DRSC_NOCALLBACK
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(void)spl1();
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siopintr(sc);
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#else
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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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single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI);
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#ifdef DEBUG
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if (*draco_intpen & DRIRQ_SCSI)
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printf("%s: intpen still 0x%x\n", sc->sc_dev.dv_xname,
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*draco_intpen);
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#endif
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add_sicallback((sifunc_t)siopintr, sc, NULL);
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#endif
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return;
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}
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#ifdef DEBUG
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void
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drsc_dump(void)
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{
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extern struct cfdriver drsc_cd;
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int i;
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for (i = 0; i < drsc_cd.cd_ndevs; ++i)
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if (drsc_cd.cd_devs[i])
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siop_dump(drsc_cd.cd_devs[i]);
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}
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#endif
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