NetBSD/sys/arch/amiga/dev/drsc.c

225 lines
5.8 KiB
C

/* $NetBSD: drsc.c,v 1.18 2001/04/25 17:53:07 bouyer Exp $ */
/*
* Copyright (c) 1996 Ignatios Souvatzis
* Copyright (c) 1994 Michael L. Hitch
* Copyright (c) 1982, 1990 The Regents of the University of California.
* 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)dma.c
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <amiga/amiga/custom.h>
#include <amiga/amiga/cc.h>
#include <amiga/amiga/device.h>
#include <amiga/amiga/isr.h>
#include <amiga/dev/siopreg.h>
#include <amiga/dev/siopvar.h>
#include <amiga/amiga/drcustom.h>
#include <machine/cpu.h> /* is_xxx(), */
void drscattach __P((struct device *, struct device *, void *));
int drscmatch __P((struct device *, struct cfdata *, void *));
int drsc_dmaintr __P((struct siop_softc *));
#ifdef DEBUG
void drsc_dump __P((void));
#endif
#ifdef DEBUG
#endif
struct cfattach drsc_ca = {
sizeof(struct siop_softc),
drscmatch,
drscattach
};
static struct siop_softc *drsc_softc;
/*
* One of us is on every DraCo motherboard,
*/
int
drscmatch(pdp, cfp, auxp)
struct device *pdp;
struct cfdata *cfp;
void *auxp;
{
static int drsc_matched = 0;
/* Allow only one instance. */
if (!is_draco() || !matchname(auxp, "drsc") || drsc_matched)
return (0);
drsc_matched = 1;
return(1);
}
void
drscattach(pdp, dp, auxp)
struct device *pdp, *dp;
void *auxp;
{
struct siop_softc *sc = (struct siop_softc *)dp;
struct zbus_args *zap;
siop_regmap_p rp;
struct scsipi_adapter *adapt = &sc->sc_adapter;
struct scsipi_channel *chan = &sc->sc_channel;
printf("\n");
zap = auxp;
sc->sc_siopp = rp = (siop_regmap_p)(DRCCADDR+NBPG*DRSCSIPG);
/*
* CTEST7 = TT1
*/
sc->sc_clock_freq = 50; /* Clock = 50MHz */
sc->sc_ctest7 = 0x02;
alloc_sicallback();
/*
* Fill in the scsipi_adapter.
*/
memset(adapt, 0, sizeof(*adapt));
adapt->adapt_dev = &sc->sc_dev;
adapt->adapt_nchannels = 1;
adapt->adapt_openings = 7;
adapt->adapt_max_periph = 1;
adapt->adapt_request = siop_scsipi_request;
adapt->adapt_minphys = siop_minphys;
/*
* Fill in the scsipi_channel.
*/
memset(chan, 0, sizeof(*chan));
chan->chan_adapter = adapt;
chan->chan_bustype = &scsi_bustype;
chan->chan_channel = 0;
chan->chan_ntargets = 8;
chan->chan_nluns = 8;
chan->chan_id = 7;
siopinitialize(sc);
#if 0
sc->sc_isr.isr_intr = drsc_dmaintr;
sc->sc_isr.isr_arg = sc;
sc->sc_isr.isr_ipl = 4;
add_isr(&sc->sc_isr);
#else
drsc_softc = sc;
single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI);
single_inst_bset_b(*draco_intena, DRIRQ_SCSI);
#endif
/*
* attach all scsi units on us
*/
config_found(dp, chan, scsiprint);
}
/*
* Level 4 interrupt processing for the MacroSystem DraCo mainboard
* SCSI. Because the level 4 interrupt is above splbio, the
* interrupt status is saved and an sicallback to the level 2 interrupt
* handler scheduled. This way, the actual processing of the interrupt
* can be deferred until splbio is unblocked.
*/
void
drsc_handler()
{
struct siop_softc *sc = drsc_softc;
siop_regmap_p rp;
int istat;
if (sc->sc_flags & SIOP_INTSOFF)
return; /* interrupts are not active */
rp = sc->sc_siopp;
istat = rp->siop_istat;
if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0)
return;
/*
* save interrupt status, DMA status, and SCSI status 0
* (may need to deal with stacked interrupts?)
*/
sc->sc_sstat0 = rp->siop_sstat0;
sc->sc_istat = istat;
sc->sc_dstat = rp->siop_dstat;
/*
* disable interrupts until the callback can process this
* interrupt.
*/
#ifdef DRSC_NOCALLBACK
(void)spl1();
siopintr(sc);
#else
rp->siop_sien = 0;
rp->siop_dien = 0;
sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF;
single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI);
#ifdef DEBUG
if (*draco_intpen & DRIRQ_SCSI)
printf("%s: intpen still 0x%x\n", sc->sc_dev.dv_xname,
*draco_intpen);
#endif
add_sicallback((sifunc_t)siopintr, sc, NULL);
#endif
return;
}
#ifdef DEBUG
void
drsc_dump()
{
extern struct cfdriver drsc_cd;
int i;
for (i = 0; i < drsc_cd.cd_ndevs; ++i)
if (drsc_cd.cd_devs[i])
siop_dump(drsc_cd.cd_devs[i]);
}
#endif