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/* $OpenBSD: pwdog.c,v 1.3 2006/11/25 20:04:47 mbalmer Exp $ */
/*
* Copyright (c) 2006 Marc Balmer <mbalmer@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
struct pwdog_softc {
struct device pwdog_dev;
bus_space_tag_t iot;
bus_space_handle_t ioh;
};
/* registers */
#define PWDOG_ACTIVATE 0
#define PWDOG_DISABLE 1
int pwdog_probe(struct device *, void *, void *);
void pwdog_attach(struct device *, struct device *, void *);
void pwdog_init_timer(struct pwdog_softc *);
int pwdog_set_timeout(void *, int);
void pwdog_disable_timer(struct pwdog_softc *);
struct cfattach pwdog_ca = {
sizeof(struct pwdog_softc), pwdog_probe, pwdog_attach
};
struct cfdriver pwdog_cd = {
NULL, "pwdog", DV_DULL
};
const struct pci_matchid pwdog_devices[] = {
{ PCI_VENDOR_QUANCOM, PCI_PRODUCT_QUANCOM_PWDOG1 }
};
int
pwdog_probe(struct device *parent, void *match, void *aux)
{
return (pci_matchbyid((struct pci_attach_args *)aux, pwdog_devices,
sizeof(pwdog_devices)/sizeof(pwdog_devices[0])));
}
void
pwdog_attach(struct device *parent, struct device *self, void *aux)
{
struct pwdog_softc *pwdog = (struct pwdog_softc *)self;
struct pci_attach_args *const pa = (struct pci_attach_args *)aux;
pcireg_t memtype;
bus_size_t iosize;
memtype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, PCI_MAPREG_START);
if (pci_mapreg_map(pa, PCI_MAPREG_START, memtype, 0, &pwdog->iot,
&pwdog->ioh, NULL, &iosize, 0)) {
printf("\n%s: PCI %s region not found\n",
pwdog->pwdog_dev.dv_xname,
memtype == PCI_MAPREG_TYPE_IO ? "I/O" : "memory");
return;
}
printf("\n");
pwdog_disable_timer(pwdog);
wdog_register(pwdog, pwdog_set_timeout);
}
/* ARGSUSED */
int
pwdog_set_timeout(void *self, int seconds)
{
struct pwdog_softc *pwdog = (struct pwdog_softc *)self;
int s;
s = splclock();
pwdog_disable_timer(pwdog);
if (!seconds) {
splx(s);
return 0;
}
bus_space_write_1(pwdog->iot, pwdog->ioh, PWDOG_ACTIVATE, 0);
splx(s);
return seconds;
}
void
pwdog_disable_timer(struct pwdog_softc *pwdog)
{
bus_space_write_1(pwdog->iot, pwdog->ioh, PWDOG_DISABLE, 0);
}
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