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/* $OpenBSD: acpibtn.c,v 1.25 2009/12/05 04:20:58 deraadt Exp $ */
/*
* Copyright (c) 2005 Marco Peereboom <marco@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/proc.h>
#include <sys/signalvar.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/acpidev.h>
#include <dev/acpi/amltypes.h>
#include <dev/acpi/dsdt.h>
#include <sys/sensors.h>
int acpibtn_match(struct device *, void *, void *);
void acpibtn_attach(struct device *, struct device *, void *);
int acpibtn_notify(struct aml_node *, int, void *);
struct acpibtn_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
struct acpi_softc *sc_acpi;
struct aml_node *sc_devnode;
int sc_btn_type;
#define ACPIBTN_UNKNOWN -1
#define ACPIBTN_LID 0
#define ACPIBTN_POWER 1
#define ACPIBTN_SLEEP 2
};
int acpibtn_getsta(struct acpibtn_softc *);
struct cfattach acpibtn_ca = {
sizeof(struct acpibtn_softc), acpibtn_match, acpibtn_attach
};
struct cfdriver acpibtn_cd = {
NULL, "acpibtn", DV_DULL
};
const char *acpibtn_hids[] = { ACPI_DEV_LD, ACPI_DEV_PBD, ACPI_DEV_SBD, 0 };
int
acpibtn_match(struct device *parent, void *match, void *aux)
{
struct acpi_attach_args *aa = aux;
struct cfdata *cf = match;
/* sanity */
return (acpi_matchhids(aa, acpibtn_hids, cf->cf_driver->cd_name));
}
void
acpibtn_attach(struct device *parent, struct device *self, void *aux)
{
struct acpibtn_softc *sc = (struct acpibtn_softc *)self;
struct acpi_attach_args *aa = aux;
sc->sc_acpi = (struct acpi_softc *)parent;
sc->sc_devnode = aa->aaa_node;
if (!strcmp(aa->aaa_dev, ACPI_DEV_LD))
sc->sc_btn_type = ACPIBTN_LID;
else if (!strcmp(aa->aaa_dev, ACPI_DEV_PBD))
sc->sc_btn_type = ACPIBTN_POWER;
else if (!strcmp(aa->aaa_dev, ACPI_DEV_SBD))
sc->sc_btn_type = ACPIBTN_SLEEP;
else
sc->sc_btn_type = ACPIBTN_UNKNOWN;
acpibtn_getsta(sc);
printf(": %s\n", sc->sc_devnode->name);
aml_register_notify(sc->sc_devnode, aa->aaa_dev, acpibtn_notify,
sc, ACPIDEV_NOPOLL);
}
int
acpibtn_getsta(struct acpibtn_softc *sc)
{
if (aml_evalname(sc->sc_acpi, sc->sc_devnode, "_STA", 0, NULL, NULL) != 0) {
dnprintf(20, "%s: no _STA\n", DEVNAME(sc));
/* XXX not all buttons have _STA so FALLTROUGH */
}
return (0);
}
int
acpibtn_notify(struct aml_node *node, int notify_type, void *arg)
{
struct acpibtn_softc *sc = arg;
#ifndef SMALL_KERNEL
int64_t lid;
#endif
dnprintf(10, "acpibtn_notify: %.2x %s\n", notify_type,
sc->sc_devnode->name);
switch (sc->sc_btn_type) {
case ACPIBTN_LID:
/*
* Notification of 0x80 for lid opens or closes. We
* need to check the current status by calling the
* _LID method. Zero means the lid is closed and we
* should go to sleep.
*/
#ifndef SMALL_KERNEL
if (aml_evalinteger(sc->sc_acpi, sc->sc_devnode,
"_LID", 0, NULL, &lid))
return (0);
#if 0
if (lid == 0)
acpi_sleep_state(sc->sc_acpi, ACPI_STATE_S3);
#endif
break;
#endif /* SMALL_KERNEL */
case ACPIBTN_SLEEP:
#ifndef SMALL_KERNEL
switch (notify_type) {
case 0x02:
/* "something" has been taken care of by the system */
break;
case 0x80:
/* Request to go to sleep */
acpi_sleep_state(sc->sc_acpi, ACPI_STATE_S3);
break;
}
#endif /* SMALL_KERNEL */
break;
case ACPIBTN_POWER:
if (notify_type == 0x80)
psignal(initproc, SIGUSR2);
break;
default:
printf("%s: spurious acpi button interrupt %i\n", DEVNAME(sc),
sc->sc_btn_type);
break;
}
return (0);
}
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