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/* $OpenBSD: bussw.c,v 1.20 2007/12/13 18:50:10 miod Exp $ */
/*
* Copyright (c) 1999 Steve Murphree, Jr.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <machine/autoconf.h>
#include <machine/cpu.h>
#include <mvme88k/dev/busswreg.h>
struct bussw_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
};
void bussw_attach(struct device *, struct device *, void *);
int bussw_match(struct device *, void *, void *);
struct cfattach bussw_ca = {
sizeof(struct bussw_softc), bussw_match, bussw_attach
};
struct cfdriver bussw_cd = {
NULL, "bussw", DV_DULL
};
int bussw_print(void *, const char *);
int bussw_scan(struct device *, void *, void *);
int
bussw_match(parent, vcf, args)
struct device *parent;
void *vcf, *args;
{
struct confargs *ca = args;
bus_space_handle_t ioh;
int rc;
u_int8_t chipid;
/* Don't match if wrong cpu */
if (brdtyp != BRD_197)
return 0;
if (bus_space_map(ca->ca_iot, ca->ca_paddr, BS_SIZE, 0, &ioh) != 0)
return 0;
rc = badaddr((vaddr_t)bus_space_vaddr(ca->ca_iot, ioh), 4);
if (rc == 0) {
chipid = bus_space_read_1(ca->ca_iot, ioh, BS_CHIPID);
if (chipid != BUSSWITCH_ID) {
#ifdef DEBUG
printf("==> busswitch: wrong chip id %x\n", chipid);
#endif
rc = -1;
}
}
bus_space_unmap(ca->ca_iot, ioh, BS_SIZE);
return rc == 0;
}
void
bussw_attach(parent, self, args)
struct device *parent, *self;
void *args;
{
struct confargs *ca = args;
struct bussw_softc *sc = (struct bussw_softc *)self;
bus_space_handle_t ioh;
int i;
if (bus_space_map(ca->ca_iot, ca->ca_paddr, BS_SIZE, 0, &ioh) != 0) {
printf(": can't map registers!\n");
return;
}
sc->sc_iot = ca->ca_iot;
sc->sc_ioh = ioh;
bus_space_write_1(sc->sc_iot, ioh, BS_VBASE,
bus_space_read_1(sc->sc_iot, ioh, BS_VBASE) | BS_VECBASE);
/* enable external interrupts */
bus_space_write_2(sc->sc_iot, ioh, BS_GCSR,
bus_space_read_2(sc->sc_iot, ioh, BS_GCSR) | BS_GCSR_XIPL);
/* disable write posting */
for (i = 0; i < 4; i++)
bus_space_write_1(sc->sc_iot, ioh, BS_PAR + i,
bus_space_read_1(sc->sc_iot, ioh, BS_PAR + i) & ~BS_PAR_WPEN);
/* enable abort switch */
bus_space_write_1(sc->sc_iot, ioh, BS_ABORT,
bus_space_read_1(sc->sc_iot, ioh, BS_ABORT) | BS_ABORT_IEN);
printf(": rev %x\n",
bus_space_read_1(sc->sc_iot, ioh, BS_CHIPREV));
config_search(bussw_scan, self, args);
}
int
bussw_print(args, bus)
void *args;
const char *bus;
{
struct confargs *ca = args;
if (ca->ca_offset != -1)
printf(" offset 0x%x", ca->ca_offset);
if (ca->ca_ipl > 0)
printf(" ipl %d", ca->ca_ipl);
return (UNCONF);
}
int
bussw_scan(parent, child, args)
struct device *parent;
void *child, *args;
{
struct cfdata *cf = child;
struct confargs oca, *ca = args;
bzero(&oca, sizeof oca);
oca.ca_iot = ca->ca_iot;
oca.ca_dmat = ca->ca_dmat;
oca.ca_offset = cf->cf_loc[0];
oca.ca_ipl = cf->cf_loc[1];
if (oca.ca_offset != -1) {
oca.ca_paddr = ca->ca_paddr + oca.ca_offset;
} else {
oca.ca_paddr = -1;
}
oca.ca_bustype = BUS_BUSSWITCH;
oca.ca_name = cf->cf_driver->cd_name;
if ((*cf->cf_attach->ca_match)(parent, cf, &oca) == 0)
return (0);
config_attach(parent, cf, &oca, bussw_print);
return (1);
}
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