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/* $OpenBSD: sbus.c,v 1.18 2010/09/05 18:10:10 kettenis Exp $ */
/* $NetBSD: sbus.c,v 1.17 1997/06/01 22:10:39 pk 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. 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/malloc.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <uvm/uvm_extern.h>
#include <machine/autoconf.h>
#include <sparc/dev/sbusreg.h>
#include <sparc/dev/sbusvar.h>
#include <sparc/dev/xboxreg.h>
#include <sparc/dev/xboxvar.h>
#include <sparc/dev/dmareg.h>
int sbus_print(void *, const char *);
/* autoconfiguration driver */
void sbus_attach(struct device *, struct device *, void *);
int sbus_match(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;
const char *sbus;
{
struct confargs *ca = args;
char *class;
static char *sl = "slave-only";
if (sbus != NULL) {
printf("\"%s\" at %s", ca->ca_ra.ra_name, sbus);
class = getpropstring(ca->ca_ra.ra_node, "device_type");
if (*class != '\0')
printf(" class %s", class);
}
/* Check root node for 'slave-only' property */
if (getpropint(0, sl, 0) & (1 << ca->ca_slot))
printf(" %s", sl);
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;
{
register struct cfdata *cf = vcf;
register struct confargs *ca = aux;
register struct romaux *ra = &ca->ca_ra;
if (CPU_ISSUN4)
return (0);
if (ca->ca_bustype == BUS_XBOX) {
struct xbox_softc *xsc = (struct xbox_softc *)parent;
/* Prevent multiple attachments */
if (xsc->sc_attached == 0) {
xsc->sc_attached = 1;
return (1);
}
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;
int rlen;
/*
* XXX there is only one SBus, for now -- do not know how to
* address children on others
*/
if (sc->sc_dev.dv_unit > 0 && ca->ca_bustype != BUS_XBOX) {
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", -1);
if (sc->sc_clockfreq <= 0)
sc->sc_clockfreq = getpropint(findroot(), "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);
sc->sc_burst = sc->sc_burst & ~SBUS_BURST_64;
if (ca->ca_bustype == BUS_XBOX) {
struct xbox_softc *xsc = (struct xbox_softc *)parent;
/* Parent has already done the leg work */
sc->sc_nrange = xsc->sc_nrange;
sc->sc_range = xsc->sc_range;
xsc->sc_attached = 2;
}
else {
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;
rlen = getproplen(node, "ranges");
if (rlen > 0) {
sc->sc_nrange = rlen / sizeof(struct rom_range);
sc->sc_range =
(struct rom_range *)malloc(rlen, M_DEVBUF, M_NOWAIT);
if (sc->sc_range == 0)
panic("sbus: PROM ranges too large: %d", rlen);
(void)getprop(node, "ranges", sc->sc_range, rlen);
}
}
/*
* 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");
#ifdef SUN4E
if (CPU_ISSUN4E && strcmp(name, "vm") == 0)
continue;
#endif
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 {
if (!CPU_ISSUN4C && !CPU_ISSUN4E)
panic("relative sbus addressing not supported");
ca->ca_slot = slot = ca->ca_ra.ra_iospace;
ca->ca_offset = base;
ca->ca_ra.ra_paddr = (void *)SBUS_ADDR(slot, base);
ca->ca_ra.ra_iospace = PMAP_OBIO;
/* 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);
ca->ca_ra.ra_reg[i].rr_iospace = PMAP_OBIO;
}
}
} 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) {
ca->ca_ra.ra_reg[i].rr_paddr +=
sc->sc_range[j].poffset;
ca->ca_ra.ra_reg[i].rr_iospace =
sc->sc_range[j].pspace;
break;
}
}
}
}
}
/*
* Returns true if this sbus slot is capable of dma
*/
int
sbus_testdma(sc, ca)
struct sbus_softc *sc;
struct confargs *ca;
{
struct romaux *ra = &ca->ca_ra;
/*
* XXX how to handle more than one sbus?
*/
if (getpropint(0, "slave-only", 0) & (1 << ca->ca_slot)) {
printf("%s: dma card found in non-dma sbus slot %d"
": not supported\n", ra->ra_name, ca->ca_slot);
return (0);
}
return (1);
}
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