/* $OpenBSD: sshdma.c,v 1.14 2006/11/28 23:59:45 dlg Exp $ */
/*
* Copyright (c) 1995 Theo de Raadt
* 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. 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 <machine/autoconf.h>
#include <mvme68k/dev/sshreg.h>
#include <mvme68k/dev/sshvar.h>
#include "mc.h"
#include "pcctwo.h"
#if NMC > 0
#include <mvme68k/dev/mcreg.h>
#endif
#if NPCCTWO > 0
#include <mvme68k/dev/pcctworeg.h>
#endif
int afscmatch(struct device *, void *, void *);
void afscattach(struct device *, struct device *, void *);
void sshintr(struct ssh_softc *);
int afsc_dmaintr(void *);
extern void sshinitialize(struct ssh_softc *);
struct scsi_adapter afsc_scsiswitch = {
ssh_scsicmd,
ssh_minphys,
0, /* no lun support */
0, /* no lun support */
};
struct scsi_device afsc_scsidev = {
NULL, /* use default error handler */
NULL, /* do not have a start function */
NULL, /* have no async handler */
NULL, /* Use default done routine */
};
struct cfattach ssh_ca = {
sizeof(struct ssh_softc), afscmatch, afscattach,
};
struct cfdriver ssh_cd = {
NULL, "ssh", DV_DULL
};
int
afscmatch(pdp, vcf, args)
struct device *pdp;
void *vcf, *args;
{
struct confargs *ca = args;
return (!badvaddr((vaddr_t)ca->ca_vaddr, 4));
}
void
afscattach(parent, self, auxp)
struct device *parent, *self;
void *auxp;
{
struct ssh_softc *sc = (struct ssh_softc *)self;
struct confargs *ca = auxp;
struct scsibus_attach_args saa;
ssh_regmap_p rp;
int tmp;
extern int cpuspeed;
sc->sc_sshp = rp = (void *)ca->ca_vaddr;
/*
* ssh uses sc_clock_freq to define the dcntl & ctest7 reg values
* (was 0x0221, but i added SSH_CTEST7_SC0 for snooping control)
* XXX does the clock frequency change for the 33MHz processors?
*/
sc->sc_clock_freq = cpuspeed * 2;
#ifdef MVME177
/* MVME177 ssh clock documented as fixed 50MHz in VME177A/HX */
if (cputyp == CPU_177)
sc->sc_clock_freq = 50;
#endif
#ifdef MVME172
/* XXX this is a guess! Same as MVME177?*/
if (cputyp == CPU_172)
sc->sc_clock_freq = 50;
#endif
sc->sc_dcntl = SSH_DCNTL_EA;
/*XXX*/ if (sc->sc_clock_freq <= 25)
/*XXX*/ sc->sc_dcntl |= (2 << 6);
/*XXX*/ else if (sc->sc_clock_freq <= 37)
/*XXX*/ sc->sc_dcntl |= (1 << 6);
/*XXX*/ else if (sc->sc_clock_freq <= 50)
/*XXX*/ sc->sc_dcntl |= (0 << 6);
/*XXX*/ else
/*XXX*/ sc->sc_dcntl |= (3 << 6);
#if defined(MVME172) || defined(MVME177)
/* No Select timouts on MC68060 */
/* XXX 177 works better with them! */
if (cputyp == CPU_172 /* || cputyp == CPU_177 */)
sc->sc_ctest7 = SSH_CTEST7_SNOOP | SSH_CTEST7_TT1 | SSH_CTEST7_STD;
else
#endif
sc->sc_ctest7 = SSH_CTEST7_SNOOP | SSH_CTEST7_TT1;
sc->sc_link.adapter_softc = sc;
sc->sc_link.adapter_target = 7; /* XXXX should ask ROM */
sc->sc_link.adapter = &afsc_scsiswitch;
sc->sc_link.device = &afsc_scsidev;
sc->sc_link.openings = 1;
sc->sc_ih.ih_fn = afsc_dmaintr;
sc->sc_ih.ih_arg = sc;
sc->sc_ih.ih_ipl = ca->ca_ipl;
sshinitialize(sc);
switch (ca->ca_bustype) {
#if NMC > 0
case BUS_MC:
mcintr_establish(MCV_NCR, &sc->sc_ih, self->dv_xname);
sys_mc->mc_ncrirq = ca->ca_ipl | MC_IRQ_IEN;
break;
#endif
#if NPCCTWO > 0
case BUS_PCCTWO:
pcctwointr_establish(PCC2V_NCR, &sc->sc_ih, self->dv_xname);
sys_pcc2->pcc2_ncrirq = ca->ca_ipl | PCC2_IRQ_IEN;
break;
#endif
}
/*
* attach all scsi units on us, watching for boot device
* (see device_register).
*/
tmp = bootpart;
if (ca->ca_paddr != bootaddr)
bootpart = -1; /* invalid flag to device_register */
bzero(&saa, sizeof(saa));
saa.saa_sc_link = &sc->sc_link;
config_found(self, &saa, scsiprint);
bootpart = tmp; /* restore old value */
}
int
afsc_dmaintr(arg)
void *arg;
{
struct ssh_softc *sc = (struct ssh_softc *)arg;
ssh_regmap_p rp;
u_char istat;
rp = sc->sc_sshp;
istat = rp->ssh_istat;
if ((istat & (SSH_ISTAT_SIP | SSH_ISTAT_DIP)) == 0)
return (0);
if ((rp->ssh_sien | rp->ssh_dien) == 0)
return (0); /* no interrupts enabled */
/*
* save interrupt status, DMA status, and SCSI status 0
* (may need to deal with stacked interrupts?)
*/
sc->sc_istat = istat;
sc->sc_dstat = rp->ssh_dstat;
sc->sc_sstat0 = rp->ssh_sstat0;
sshintr(sc);
return (1);
}
#ifdef DEBUG
void
afsc_dump()
{
int i;
for (i = 0; i < afsccd.cd_ndevs; ++i)
if (afsccd.cd_devs[i])
ssh_dump(afsccd.cd_devs[i]);
}
#endif