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/* $OpenBSD: power.c,v 1.9 2022/04/06 18:59:26 naddy Exp $ */
/*
* Copyright (c) 2007 Martin Reindl.
*
* 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/kernel.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <machine/bus.h>
#include <machine/autoconf.h>
#include <sh/include/devreg.h>
#include <landisk/landisk/landiskreg.h>
#include <landisk/dev/obiovar.h>
struct power_softc {
struct device sc_dev;
void *sc_ih;
};
int power_match(struct device *, void *, void *);
void power_attach(struct device *, struct device *, void *);
int power_intr(void *aux);
const struct cfattach power_ca = {
sizeof(struct power_softc),
power_match,
power_attach
};
struct cfdriver power_cd = {
NULL, "power", DV_DULL
};
struct power_softc *power_softc;
int
power_match(struct device *parent, void *match, void *aux)
{
struct obio_attach_args *oa = aux;
static struct obio_irq power_match_irq;
oa->oa_nio = 0;
oa->oa_niomem = 0;
if (oa->oa_nirq == 0)
oa->oa_irq = &power_match_irq;
oa->oa_nirq = 1;
oa->oa_irq[0].or_irq = LANDISK_INTR_PWRSW;
return (1);
}
void
power_attach(struct device *parent, struct device *self, void *aux)
{
struct power_softc *sc = (void *)self;
power_softc = sc;
sc->sc_ih = extintr_establish(LANDISK_INTR_PWRSW, IPL_TTY,
power_intr, sc, sc->sc_dev.dv_xname);
if (sc->sc_ih == NULL) {
printf(": couldn't map interrupt\n");
return;
}
printf("\n");
}
int
power_intr(void *arg)
{
extern int allowpowerdown;
int status;
status = (int8_t)_reg_read_1(LANDISK_BTNSTAT);
if (status == -1) {
return (0);
}
status = ~status;
if (status & BTN_POWER_BIT) {
#ifdef DEBUG
printf("%s switched\n", sc->sc_dev.dv_xname);
db_enter();
#endif
_reg_write_1(LANDISK_PWRSW_INTCLR, 1);
if (allowpowerdown == 1) {
allowpowerdown = 0;
prsignal(initprocess, SIGUSR1);
}
return (1);
}
return (0);
}
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