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/* $OpenBSD: power.c,v 1.7 2008/09/16 16:38:25 jasper Exp $ */
/*
* Copyright (c) 2007 Jasper Lievisse Adriaanse <jasper@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/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <dev/ic/ds1687reg.h>
#include <machine/autoconf.h>
#include <sgi/localbus/macebus.h>
/*
* Power button driver for the SGI O2.
*/
struct power_softc {
struct device sc_dev;
bus_space_tag_t sc_st;
bus_space_handle_t sc_sh;
bus_space_handle_t sc_isash;
};
int power_match(struct device *, void *, void *);
void power_attach(struct device *, struct device *, void *);
int power_intr(void *aux);
struct cfattach power_ca = {
sizeof(struct power_softc),
power_match,
power_attach
};
struct cfdriver power_cd = {
NULL, "power", DV_DULL
};
int
power_match(struct device *parent, void *match, void *aux)
{
return (1);
}
void
power_attach(struct device *parent, struct device *self, void *aux)
{
struct power_softc *sc = (void *)self;
struct confargs *ca = aux;
extern bus_space_handle_t clock_h;
extern bus_space_handle_t mace_h;
sc->sc_st = ca->ca_iot;
/* Map subregion to clock address space. */
if (bus_space_subregion(sc->sc_st, clock_h, 0, 0x50, &sc->sc_sh)) {
printf(": failed to map clock address space!\n");
return;
}
/* Map subregion to ISA control registers. */
if (bus_space_subregion(sc->sc_st, mace_h, 0, 0x80, &sc->sc_isash)) {
printf(": failed to map ISA control registers!\n");
return;
}
/* Establish interrupt handler. */
if (macebus_intr_establish(NULL, ca->ca_intr, IST_EDGE, IPL_TTY,
power_intr, sc, sc->sc_dev.dv_xname))
printf("\n");
else
printf(": unable to establish interrupt!\n");
}
int
power_intr(void *arg)
{
struct power_softc *sc = (void *)arg;
u_int64_t val;
extern int kbd_reset;
/* Check to see if this interrupt is for us. */
val = bus_space_read_8(sc->sc_st, sc->sc_isash, MACE_ISA_INT_STAT);
if (val & MACE_ISA_INT_RTC) {
/*
* Prevent further interrupts by clearing the kickstart flag
* in the DS1687's extended control register.
*/
val = bus_space_read_1(sc->sc_st, sc->sc_sh, DS1687_EXT_CTRL);
bus_space_write_1(sc->sc_st, sc->sc_sh, DS1687_EXT_CTRL,
val & ~DS1687_KICKSTART);
if (kbd_reset == 1) {
kbd_reset = 0;
psignal(initproc, SIGUSR2);
}
return (1);
}
return (0);
}
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