105 lines
3.1 KiB
C
105 lines
3.1 KiB
C
/* $NetBSD: epwdog.c,v 1.3 2006/08/21 15:01:54 hamajima Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2005 HAMAJIMA Katsuomi. 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/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: epwdog.c,v 1.3 2006/08/21 15:01:54 hamajima Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/device.h>
|
|
#include <machine/bus.h>
|
|
#include <arm/ep93xx/ep93xxvar.h>
|
|
#include <arm/ep93xx/epsocvar.h>
|
|
#include <arm/ep93xx/epwdogreg.h>
|
|
#include <arm/ep93xx/epwdogvar.h>
|
|
|
|
struct epwdog_softc {
|
|
struct device sc_dev;
|
|
bus_space_tag_t sc_iot;
|
|
bus_space_handle_t sc_ioh;
|
|
};
|
|
|
|
static int epwdog_match(struct device *, struct cfdata *, void *);
|
|
static void epwdog_attach(struct device *, struct device *, void *);
|
|
|
|
CFATTACH_DECL(epwdog, sizeof(struct epwdog_softc),
|
|
epwdog_match, epwdog_attach, NULL, NULL);
|
|
|
|
static struct epwdog_softc *the_epwdog_sc = 0;
|
|
|
|
static int
|
|
epwdog_match(struct device *parent, struct cfdata *match, void *aux)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
epwdog_attach(struct device *parent, struct device *self, void *aux)
|
|
{
|
|
struct epwdog_softc *sc = (struct epwdog_softc*)self;
|
|
struct epsoc_attach_args *sa = aux;
|
|
|
|
printf("\n");
|
|
sc->sc_iot = sa->sa_iot;
|
|
|
|
if (bus_space_map(sa->sa_iot, sa->sa_addr,
|
|
sa->sa_size, 0, &sc->sc_ioh)){
|
|
printf("%s: Cannot map registers", self->dv_xname);
|
|
return;
|
|
}
|
|
|
|
if (!the_epwdog_sc)
|
|
the_epwdog_sc = sc;
|
|
#ifdef DIAGNOSTIC
|
|
else
|
|
printf("%s is already configured\n", sc->sc_dev.dv_xname);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
epwdog_reset(void)
|
|
{
|
|
struct epwdog_softc *sc = the_epwdog_sc;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (!sc) {
|
|
printf("epwdog not configured\n");
|
|
return (ENXIO);
|
|
}
|
|
#endif
|
|
|
|
bus_space_write_2(sc->sc_iot, sc->sc_ioh,
|
|
EP93XX_WDOG_Ctrl, EP93XX_WDOG_DISABLE);
|
|
splhigh();
|
|
bus_space_write_2(sc->sc_iot, sc->sc_ioh,
|
|
EP93XX_WDOG_Ctrl, EP93XX_WDOG_ENABLE);
|
|
while (1);
|
|
|
|
return 0; /* not reached */
|
|
}
|