NetBSD-5.0.2/sys/arch/mipsco/isa/isa_machdep.c
/* $NetBSD: isa_machdep.c,v 1.8 2008/04/28 20:23:28 martin Exp $ */
/*
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Wayne Knowles
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: isa_machdep.c,v 1.8 2008/04/28 20:23:28 martin Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <machine/sysconf.h>
#include <machine/autoconf.h>
#include <machine/mainboard.h>
#include <machine/bus.h>
#include <dev/isa/isavar.h>
#include <dev/isa/isareg.h>
static int mipscoisabusprint __P((void *auxp, const char *));
static int isabusmatch __P((struct device *, struct cfdata *, void *));
static void isabusattach __P((struct device *, struct device *, void *));
struct isabus_softc {
struct device sc_dev;
struct mipsco_isa_chipset sc_isa_ic;
};
CFATTACH_DECL(isabus, sizeof(struct isabus_softc),
isabusmatch, isabusattach, NULL, NULL);
extern struct cfdriver isabus_cd;
static struct mipsco_bus_space isa_io_bst, isa_mem_bst, isa_ctl_bst;
static struct mipsco_bus_dma_tag isa_dmatag;
static void isa_bus_space_init __P((struct mipsco_bus_space *, const char *,
paddr_t, size_t));
int isa_intr __P((void *));
int
isabusmatch(pdp, cfp, aux)
struct device *pdp;
struct cfdata *cfp;
void *aux;
{
struct confargs *ca = aux;
if (strcmp(ca->ca_name, isabus_cd.cd_name) != 0)
return 0;
return 1;
}
static void
isa_bus_space_init(bst, type, paddr, len)
struct mipsco_bus_space *bst;
const char *type;
paddr_t paddr;
size_t len;
{
vaddr_t vaddr = MIPS_PHYS_TO_KSEG1(paddr); /* XXX */
/* Setup default bus_space */
mipsco_bus_space_init(bst, type, paddr, vaddr, 0x0, len);
/* ISA bus maps 1 word for every byte, therefore stride = 2 */
mipsco_bus_space_set_aligned_stride(bst, 2);
/*
* ISA bus will do an automatic byte swap, but when accessing
* memory using bus_space_stream functions we need to byte swap
* to reverse the one performed in hardware
*/
bst->bs_bswap = 1;
bst->bs_intr_establish = (void *)isa_intr_establish;
printf(" %s %p", type, (void *)vaddr);
}
void
isabusattach(pdp, dp, aux)
struct device *pdp, *dp;
void *aux;
{
struct isabus_softc *sc = (struct isabus_softc *)dp;
struct mipsco_isa_chipset *ic = &sc->sc_isa_ic;
struct isabus_attach_args iba;
printf(":");
iba.iba_iot = &isa_io_bst;
iba.iba_memt = &isa_mem_bst;
iba.iba_dmat = &isa_dmatag;
iba.iba_ic = ic;
isa_bus_space_init(&isa_io_bst, "isa_io", PIZAZZ_ISA_IOBASE,
PIZAZZ_ISA_IOSIZE);
isa_bus_space_init(&isa_mem_bst, "isa_mem", PIZAZZ_ISA_MEMBASE,
PIZAZZ_ISA_MEMSIZE);
isa_bus_space_init(&isa_ctl_bst, "isa_intr", PIZAZZ_ISA_INTRLATCH,
sizeof(u_int32_t));
_bus_dma_tag_init(&isa_dmatag);
ic->ic_bst = &isa_ctl_bst;
if (bus_space_map(ic->ic_bst, 0x00000, sizeof(u_int32_t),
BUS_SPACE_MAP_LINEAR, &ic->ic_bsh) != 0) {
printf(": can't map intrreg\n");
return;
}
/* Clear ISA interrupt latch */
bus_space_write_4(ic->ic_bst, ic->ic_bsh, 0, 0);
evcnt_attach_dynamic(&ic->ic_intrcnt, EVCNT_TYPE_INTR, NULL,
dp->dv_xname, "intr");
LIST_INIT(&ic->intr_q);
(*platform.intr_establish)(SYS_INTR_ATBUS, isa_intr, ic);
printf("\n");
config_found_ia(dp, "isabus", &iba, mipscoisabusprint);
}
int
mipscoisabusprint(auxp, name)
void *auxp;
const char *name;
{
if(name == NULL)
return(UNCONF);
return(QUIET);
}
void
isa_attach_hook(parent, self, iba)
struct device *parent, *self;
struct isabus_attach_args *iba;
{
}
const struct evcnt *
isa_intr_evcnt(isa_chipset_tag_t ic, int irq)
{
/* XXX for now, no evcnt parent reported */
return NULL;
}
void *
isa_intr_establish(ic, intr, type, level, ih_fun, ih_arg)
isa_chipset_tag_t ic;
int intr;
int type; /* XXX not yet */
int level; /* XXX not yet */
int (*ih_fun) __P((void*));
void *ih_arg;
{
struct mipsco_intrhand *ih;
ih = malloc(sizeof *ih, M_DEVBUF, M_NOWAIT);
if (ih == NULL)
panic("isa_intr_establish: malloc failed");
ih->ih_fun = ih_fun;
ih->ih_arg = ih_arg;
LIST_INSERT_HEAD(&ic->intr_q, ih, ih_q);
return ih;
}
void
isa_intr_disestablish(ic, cookie)
isa_chipset_tag_t ic;
void *cookie;
{
struct mipsco_intrhand *ih = cookie;
LIST_REMOVE(ih, ih_q);
free(ih, M_DEVBUF);
}
int
isa_intr_alloc(ic, mask, type, irq)
isa_chipset_tag_t ic;
int mask;
int type;
int *irq;
{
return 0;
}
int
isa_intr(arg)
void *arg;
{
struct mipsco_isa_chipset *ic = (struct mipsco_isa_chipset *)arg;
struct mipsco_intrhand *ih;
int rv, handled;
ic->ic_intrcnt.ev_count++;
handled = 0;
LIST_FOREACH(ih, &ic->intr_q, ih_q) {
/*
* The handler returns one of three values:
* 0: This interrupt wasn't for me.
* 1: This interrupt was for me.
* -1: This interrupt might have been for me, but I can't say
* for sure.
*/
rv = (*ih->ih_fun)(ih->ih_arg);
handled |= (rv != 0);
}
/* Clear ISA interrupt latch */
bus_space_write_4(ic->ic_bst, ic->ic_bsh, 0, 0);
return handled;
}