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/* $NetBSD: drsc.c,v 1.2 1996/05/19 19:03:01 is 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 <scsi/scsi_all.h>
#include <scsi/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>
int drscprint __P((void *auxp, char *));
void drscattach __P((struct device *, struct device *, void *));
int drscmatch __P((struct device *, void *, void *));
int drsc_dmaintr __P((struct siop_softc *));
#ifdef DEBUG
void drsc_dump __P((void));
#endif
struct scsi_adapter drsc_scsiswitch = {
siop_scsicmd,
siop_minphys,
0, /* no lun support */
0, /* no lun support */
};
struct scsi_device drsc_scsidev = {
NULL, /* use default error handler */
NULL, /* do not have a start functio */
NULL, /* have no async handler */
NULL, /* Use default done routine */
};
#ifdef DEBUG
#endif
struct cfattach drsc_ca = {
sizeof(struct siop_softc),
drscmatch,
drscattach
};
struct cfdriver drsc_cd = {
NULL, "drsc", DV_DULL, NULL, 0
};
static struct siop_softc *drsc_softc;
/*
* One of us is on every DraCo motherboard,
*/
int
drscmatch(pdp, match, auxp)
struct device *pdp;
void *match, *auxp;
{
struct cfdata *cdp = (struct cfdata *)match;
if (is_draco() && (cdp->cf_unit == 0))
return(1);
return(0);
}
void
drscattach(pdp, dp, auxp)
struct device *pdp, *dp;
void *auxp;
{
struct siop_softc *sc;
struct zbus_args *zap;
siop_regmap_p rp;
printf("\n");
zap = auxp;
sc = (struct siop_softc *)dp;
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();
sc->sc_link.adapter_softc = sc;
sc->sc_link.adapter_target = 7;
sc->sc_link.adapter = &drsc_scsiswitch;
sc->sc_link.device = &drsc_scsidev;
sc->sc_link.openings = 2;
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;
*draco_intpen &= ~DRIRQ_SCSI;
*draco_intena |= DRIRQ_SCSI;
#endif
/*
* attach all scsi units on us
*/
config_found(dp, &sc->sc_link, drscprint);
}
/*
* print diag if pnp is NULL else just extra
*/
int
drscprint(auxp, pnp)
void *auxp;
char *pnp;
{
if (pnp == NULL)
return(UNCONF);
return(QUIET);
}
/*
* 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;
*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()
{
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
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