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/* $OpenBSD: power.c,v 1.7 2014/07/11 08:18:31 guenther Exp $ */
/*
* Copyright (c) 2006 Jason L. Wright (jason@thought.net)
* 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 ``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 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.
*/
/*
* Driver for power-button device on U5, U10, etc.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/timeout.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <machine/bus.h>
#include <machine/autoconf.h>
#include <machine/openfirm.h>
#include <sparc64/dev/ebusreg.h>
#include <sparc64/dev/ebusvar.h>
#define POWER_REG 0
#define POWER_REG_CPWR_OFF 0x00000002 /* courtesy power off */
#define POWER_REG_SPWR_OFF 0x00000001 /* system power off */
struct power_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
struct intrhand *sc_ih;
};
int power_match(struct device *, void *, void *);
void power_attach(struct device *, struct device *, void *);
int power_intr(void *);
struct cfattach power_ca = {
sizeof(struct power_softc), power_match, power_attach
};
struct cfdriver power_cd = {
NULL, "power", DV_DULL
};
int
power_match(parent, match, aux)
struct device *parent;
void *match;
void *aux;
{
struct ebus_attach_args *ea = aux;
if (strcmp(ea->ea_name, "power") == 0)
return (1);
return (0);
}
void
power_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct power_softc *sc = (void *)self;
struct ebus_attach_args *ea = aux;
if (ea->ea_nregs < 1) {
printf(": no registers\n");
return;
}
/* Use prom address if available, otherwise map it. */
if (ea->ea_nvaddrs) {
if (bus_space_map(ea->ea_memtag, ea->ea_vaddrs[0], 0,
BUS_SPACE_MAP_PROMADDRESS, &sc->sc_ioh)) {
printf(": can't map PROM register space\n");
return;
}
sc->sc_iot = ea->ea_memtag;
} else if (ebus_bus_map(ea->ea_iotag, 0,
EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
sc->sc_iot = ea->ea_iotag;
} else if (ebus_bus_map(ea->ea_memtag, 0,
EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
sc->sc_iot = ea->ea_memtag;
} else {
printf("%s: can't map register space\n", self->dv_xname);
return;
}
if (ea->ea_nintrs > 0 && OF_getproplen(ea->ea_node, "button") >= 0) {
sc->sc_ih = bus_intr_establish(sc->sc_iot, ea->ea_intrs[0],
IPL_BIO, 0, power_intr, sc, self->dv_xname);
if (sc->sc_ih == NULL) {
printf(": can't establish interrupt\n");
return;
}
}
printf("\n");
}
int
power_intr(void *vsc)
{
extern int allowpowerdown;
if (allowpowerdown == 1) {
allowpowerdown = 0;
prsignal(initprocess, SIGUSR2);
}
return (1);
}
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