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/* $OpenBSD: sgc.c,v 1.5 2007/01/06 20:10:57 miod Exp $ */
/*
* Copyright (c) 2005, Miodrag Vallat
*
* 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.
*
*/
/*
* SGC bus attachment and mapping glue.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <machine/autoconf.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/hp300spu.h>
#include <hp300/dev/sgcreg.h>
#include <hp300/dev/sgcvar.h>
int sgcmatch(struct device *, void *, void *);
void sgcattach(struct device *, struct device *, void *);
int sgcprint(void *, const char *);
struct cfattach sgc_ca = {
sizeof(struct device), sgcmatch, sgcattach
};
struct cfdriver sgc_cd = {
NULL, "sgc", DV_DULL
};
int
sgcmatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
static int sgc_matched = 0;
/* Allow only one instance. */
if (sgc_matched)
return (0);
/*
* Leave out machines which can not have an SGC bus.
*/
if (machineid != HP_400 && machineid != HP_425 &&
machineid != HP_433)
return (0);
return (sgc_matched = 1);
}
void
sgcattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct sgc_attach_args saa;
caddr_t pa, va;
int slot, rv;
extern struct hp300_bus_space_tag hp300_mem_tag;
printf("\n");
for (slot = 0; slot < SGC_NSLOTS; slot++) {
pa = sgc_slottopa(slot);
va = iomap(pa, PAGE_SIZE);
if (va == NULL) {
printf("%s: can't map slot %d\n", self->dv_xname, slot);
continue;
}
/* Check for hardware. */
rv = badaddr(va);
iounmap(va, PAGE_SIZE);
if (rv != 0)
continue;
bzero(&saa, sizeof(saa));
saa.saa_slot = slot;
saa.saa_iot = &hp300_mem_tag;
/* Attach matching device. */
config_found(self, &saa, sgcprint);
}
}
int
sgcprint(aux, pnp)
void *aux;
const char *pnp;
{
struct sgc_attach_args *saa = aux;
if (pnp)
printf("unknown SGC card at %s", pnp);
printf(" slot %d", saa->saa_slot);
return (UNCONF);
}
/*
* Convert a slot number to a system physical address.
* This is needed for bus_space.
*/
void *
sgc_slottopa(int slot)
{
u_long rval;
if (slot < 0 || slot >= SGC_NSLOTS)
rval = 0;
else
rval = SGC_BASE + (slot * SGC_DEVSIZE);
return ((void *)rval);
}
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