NetBSD/sys/arch/sparc/dev/sbus.c

274 lines
7.5 KiB
C

/* $NetBSD: sbus.c,v 1.10 1996/04/22 02:35:03 abrown Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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, Lawrence Berkeley Laboratory.
*
* 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.
*
* @(#)sbus.c 8.1 (Berkeley) 6/11/93
*/
/*
* Sbus stuff.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <sparc/dev/sbusreg.h>
#include <sparc/dev/sbusvar.h>
int sbus_print __P((void *, char *));
void sbusreset __P((int));
/* autoconfiguration driver */
void sbus_attach __P((struct device *, struct device *, void *));
int sbus_match __P((struct device *, void *, void *));
struct cfattach sbus_ca = {
sizeof(struct sbus_softc), sbus_match, sbus_attach
};
struct cfdriver sbus_cd = {
NULL, "sbus", DV_DULL
};
/*
* Print the location of some sbus-attached device (called just
* before attaching that device). If `sbus' is not NULL, the
* device was found but not configured; print the sbus as well.
* Return UNCONF (config_find ignores this if the device was configured).
*/
int
sbus_print(args, sbus)
void *args;
char *sbus;
{
register struct confargs *ca = args;
if (sbus)
printf("%s at %s", ca->ca_ra.ra_name, sbus);
printf(" slot %d offset 0x%x", ca->ca_slot, ca->ca_offset);
return (UNCONF);
}
int
sbus_match(parent, vcf, aux)
struct device *parent;
void *vcf, *aux;
{
struct cfdata *cf = vcf;
register struct confargs *ca = aux;
register struct romaux *ra = &ca->ca_ra;
if (CPU_ISSUN4)
return (0);
return (strcmp(cf->cf_driver->cd_name, ra->ra_name) == 0);
}
/*
* Attach an Sbus.
*/
void
sbus_attach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
register struct sbus_softc *sc = (struct sbus_softc *)self;
struct confargs *ca = aux;
register struct romaux *ra = &ca->ca_ra;
register int node;
register char *name;
struct confargs oca;
/*
* XXX there is only one Sbus, for now -- do not know how to
* address children on others
*/
if (sc->sc_dev.dv_unit > 0) {
printf(" unsupported\n");
return;
}
/*
* Record clock frequency for synchronous SCSI.
* IS THIS THE CORRECT DEFAULT??
*/
node = ra->ra_node;
sc->sc_clockfreq = getpropint(node, "clock-frequency", 25*1000*1000);
printf(": clock = %s MHz\n", clockfreq(sc->sc_clockfreq));
/*
* Get the SBus burst transfer size if burst transfers are supported
*/
sc->sc_burst = getpropint(node, "burst-sizes", 0);
if (ra->ra_bp != NULL && strcmp(ra->ra_bp->name, "sbus") == 0)
oca.ca_ra.ra_bp = ra->ra_bp + 1;
else
oca.ca_ra.ra_bp = NULL;
sc->sc_range = ra->ra_range;
sc->sc_nrange = ra->ra_nrange;
/*
* Loop through ROM children, fixing any relative addresses
* and then configuring each device.
*/
for (node = firstchild(node); node; node = nextsibling(node)) {
name = getpropstring(node, "name");
if (!romprop(&oca.ca_ra, name, node))
continue;
sbus_translate(self, &oca);
oca.ca_bustype = BUS_SBUS;
(void) config_found(&sc->sc_dev, (void *)&oca, sbus_print);
}
}
void
sbus_translate(dev, ca)
struct device *dev;
struct confargs *ca;
{
struct sbus_softc *sc = (struct sbus_softc *)dev;
register int base, slot;
register int i;
if (sc->sc_nrange == 0) {
/* Old-style Sbus configuration */
base = (int)ca->ca_ra.ra_paddr;
if (SBUS_ABS(base)) {
ca->ca_slot = SBUS_ABS_TO_SLOT(base);
ca->ca_offset = SBUS_ABS_TO_OFFSET(base);
} else {
ca->ca_slot = slot = ca->ca_ra.ra_iospace;
ca->ca_offset = base;
ca->ca_ra.ra_paddr =
(void *)SBUS_ADDR(slot, base);
/* Fix any remaining register banks */
for (i = 1; i < ca->ca_ra.ra_nreg; i++) {
base = (int)ca->ca_ra.ra_reg[i].rr_paddr;
ca->ca_ra.ra_reg[i].rr_paddr =
(void *)SBUS_ADDR(slot, base);
}
}
} else {
ca->ca_slot = ca->ca_ra.ra_iospace;
ca->ca_offset = (int)ca->ca_ra.ra_paddr;
/* Translate into parent address spaces */
for (i = 0; i < ca->ca_ra.ra_nreg; i++) {
int j, cspace = ca->ca_ra.ra_reg[i].rr_iospace;
for (j = 0; j < sc->sc_nrange; j++) {
if (sc->sc_range[j].cspace == cspace) {
(int)ca->ca_ra.ra_reg[i].rr_paddr +=
sc->sc_range[j].poffset;
(int)ca->ca_ra.ra_reg[i].rr_iospace =
sc->sc_range[j].pspace;
break;
}
}
}
}
}
/*
* Each attached device calls sbus_establish after it initializes
* its sbusdev portion.
*/
void
sbus_establish(sd, dev)
register struct sbusdev *sd;
register struct device *dev;
{
register struct sbus_softc *sc;
register struct device *curdev;
/*
* We have to look for the sbus by name, since it is not necessarily
* our immediate parent (i.e. sun4m /iommu/sbus/espdma/esp)
* We don't just use the device structure of the above-attached
* sbus, since we might (in the future) support multiple sbus's.
*/
for (curdev = dev->dv_parent; ; curdev = curdev->dv_parent) {
if (!curdev || !curdev->dv_xname)
panic("sbus_establish: can't find sbus parent for %s",
(sd->sd_dev->dv_xname ? sd->sd_dev->dv_xname :
"<unknown>"));
if (strncmp(curdev->dv_xname, "sbus", 4) == 0)
break;
}
sc = (struct sbus_softc *) curdev;
sd->sd_dev = dev;
sd->sd_bchain = sc->sc_sbdev;
sc->sc_sbdev = sd;
}
/*
* Reset the given sbus. (???)
*/
void
sbusreset(sbus)
int sbus;
{
register struct sbusdev *sd;
struct sbus_softc *sc = sbus_cd.cd_devs[sbus];
struct device *dev;
printf("reset %s:", sc->sc_dev.dv_xname);
for (sd = sc->sc_sbdev; sd != NULL; sd = sd->sd_bchain) {
if (sd->sd_reset) {
dev = sd->sd_dev;
(*sd->sd_reset)(dev);
printf(" %s", dev->dv_xname);
}
}
}