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/* $OpenBSD: sshdma.c,v 1.12 2003/06/02 23:27:52 millert Exp $ */
/*
* Copyright (c) 1996 Nivas Madhur
* 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 <uvm/uvm_extern.h>
#include <uvm/uvm_pmap.h>
#include <machine/autoconf.h>
#include <machine/board.h>
#include <machine/mmu.h>
#include <machine/pmap.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <mvme88k/dev/sshreg.h>
#include <mvme88k/dev/sshvar.h>
#include "pcctwo.h"
#if NPCCTWO > 0
#include <mvme88k/dev/pcctwofunc.h>
#include <mvme88k/dev/pcctworeg.h>
#endif
int afscmatch(struct device *, void *, void *);
void afscattach(struct device *, struct device *, void *);
int afscprint(void *auxp, char *);
int sshintr(struct ssh_softc *);
int afsc_dmaintr(void *);
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, 0
};
int
afscmatch(pdp, vcf, args)
struct device *pdp;
void *vcf, *args;
{
struct confargs *ca = args;
if (badvaddr((vm_offset_t)IIOV(ca->ca_vaddr), 4)) {
return(0);
}
return (1);
}
void
afscattach(parent, self, auxp)
struct device *parent, *self;
void *auxp;
{
struct ssh_softc *sc = (struct ssh_softc *)self;
struct confargs *ca = auxp;
ssh_regmap_p rp;
int tmp;
extern int cpuspeed;
sc->sc_sshp = rp = 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;
sc->sc_dcntl = SSH_DCNTL_EA;
/*X*/ if (sc->sc_clock_freq <= 25)
/*X*/ sc->sc_dcntl |= (2 << 6);
/*X*/ else if (sc->sc_clock_freq <= 37)
/*X*/ sc->sc_dcntl |= (1 << 6);
/*X*/ else if (sc->sc_clock_freq <= 50)
/*X*/ sc->sc_dcntl |= (0 << 6);
/*X*/ else
/*X*/ sc->sc_dcntl |= (3 << 6);
sc->sc_ctest0 = SSH_CTEST0_BTD | SSH_CTEST0_EAN;
/*
* MVME187 doesn't implement snooping...
*/
sc->sc_ctest7 = 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_wantframe = 0;
sc->sc_ih.ih_ipl = ca->ca_ipl;
sshinitialize(sc);
switch (ca->ca_bustype) {
#if NPCCTWO > 0
case BUS_PCCTWO:
{
/*
* Disable caching for the softc. Actually, I want
* to disable cache for acb structures, but they are
* part of softc, and I am disabling the entire softc
* just in case.
*/
struct pcctworeg *pcc2 = (struct pcctworeg *)ca->ca_master;
pmap_cache_ctrl(pmap_kernel(), trunc_page((vm_offset_t)sc),
round_page((vm_offset_t)sc + sizeof(*sc)),
CACHE_INH);
pcctwointr_establish(PCC2V_NCR, &sc->sc_ih);
/* enable interrupts at ca_ipl */
pcc2->pcc2_ncrirq = ca->ca_ipl | PCC2_IRQ_IEN;
break;
}
#endif
}
evcnt_attach(&sc->sc_dev, "intr", &sc->sc_intrcnt);
/*
* attach all scsi units on us, watching for boot device
* (see dk_establish).
*/
tmp = bootpart;
if (ca->ca_paddr != bootaddr)
bootpart = -1; /* invalid flag to dk_establish */
config_found(self, &sc->sc_link, scsiprint);
bootpart = tmp; /* restore old value */
}
/*
* print diag if pnp is NULL else just extra
*/
int
afscprint(auxp, pnp)
void *auxp;
char *pnp;
{
if (pnp == NULL)
return (UNCONF);
return (QUIET);
}
int
afsc_dmaintr(arg)
void *arg;
{
struct ssh_softc *sc = 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 */
/*
* 53c710 manual recommends reading dstat and sstat0 at least
* 12 clk cycles apart if reading as bytes (which is what
* pcc2 permits). Stick in a 1us delay between accessing dstat and
* sstat0 below.
*
* save interrupt status, DMA status, and SCSI status 0
* (may need to deal with stacked interrupts?)
*/
sc->sc_istat = istat;
if (istat & SSH_ISTAT_SIP) {
sc->sc_sstat0 = rp->ssh_sstat0;
}
if (istat & SSH_ISTAT_DIP) {
delay(3);
sc->sc_dstat = rp->ssh_dstat;
}
sshintr(sc);
sc->sc_intrcnt.ev_count++;
return (1);
}
#ifdef XXX_CD_DEBUG /* XXXsmurph What is afsccd ?? */
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
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