NetBSD/sys/arch/hpcmips/vr/vrdsu.c

107 lines
3.1 KiB
C

/* $NetBSD: vrdsu.c,v 1.4 2002/01/27 14:18:12 takemura Exp $ */
/*
* Copyright (c) 1999 Shin Takemura All rights reserved.
* Copyright (c) 1999 PocketBSD Project. All rights reserved.
*
* 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 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 AUTHOR 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/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <hpcmips/vr/vripif.h>
#include <hpcmips/vr/dsureg.h>
#include <hpcmips/vr/vrdsuvar.h>
struct vrdsu_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
};
static int vrdsumatch(struct device *, struct cfdata *, void *);
static void vrdsuattach(struct device *, struct device *, void *);
static void vrdsu_write(struct vrdsu_softc *, int, unsigned short);
static unsigned short vrdsu_read(struct vrdsu_softc *, int);
struct cfattach vrdsu_ca = {
sizeof(struct vrdsu_softc), vrdsumatch, vrdsuattach
};
struct vrdsu_softc *the_dsu_sc = NULL;
static inline void
vrdsu_write(struct vrdsu_softc *sc, int port, unsigned short val)
{
bus_space_write_2(sc->sc_iot, sc->sc_ioh, port, val);
}
static inline unsigned short
vrdsu_read(struct vrdsu_softc *sc, int port)
{
return (bus_space_read_2(sc->sc_iot, sc->sc_ioh, port));
}
static int
vrdsumatch(struct device *parent, struct cfdata *cf, void *aux)
{
return (1);
}
static void
vrdsuattach(struct device *parent, struct device *self, void *aux)
{
struct vrdsu_softc *sc = (struct vrdsu_softc *)self;
struct vrip_attach_args *va = aux;
sc->sc_iot = va->va_iot;
if (bus_space_map(va->va_iot, va->va_addr, va->va_size,
0, &sc->sc_ioh)) {
printf(": can't map bus space\n");
return;
}
printf("\n");
the_dsu_sc = sc;
}
void
vrdsu_reset()
{
if (the_dsu_sc) {
splhigh();
vrdsu_write(the_dsu_sc, DSUSET_REG_W, 1); /* 1 sec */
vrdsu_write(the_dsu_sc, DSUCNT_REG_W, DSUCNT_DSWEN);
while (1);
} else {
printf("%s(%d): There is no DSU.", __FILE__, __LINE__);
}
}