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/* $OpenBSD: acpitz.c,v 1.6 2006/10/24 20:30:00 marco Exp $ */
/*
* Copyright (c) 2006 Can Erkin Acar <canacar@openbsd.org>
* 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/rwlock.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>
struct acpitz_softc {
struct device sc_dev;
struct acpi_softc *sc_acpi;
struct aml_node *sc_devnode;
struct rwlock sc_lock;
u_int64_t sc_tmp;
u_int64_t sc_crt;
struct sensor sc_sens;
};
int acpitz_match(struct device *, void *, void *);
void acpitz_attach(struct device *, struct device *, void *);
struct cfattach acpitz_ca = {
sizeof(struct acpitz_softc), acpitz_match, acpitz_attach
};
struct cfdriver acpitz_cd = {
NULL, "acpitz", DV_DULL
};
void acpitz_monitor(struct acpitz_softc *);
void acpitz_refresh(void *);
int acpitz_notify(struct aml_node *, int, void *);
int acpitz_getreading(struct acpitz_softc *, char *);
int
acpitz_match(struct device *parent, void *match, void *aux)
{
struct acpi_attach_args *aa = aux;
struct cfdata *cf = match;
/* sanity */
if (aa->aaa_name == NULL ||
strcmp(aa->aaa_name, cf->cf_driver->cd_name) != 0 ||
aa->aaa_table != NULL)
return (0);
if (aa->aaa_node->value->type != AML_OBJTYPE_THERMZONE)
return (0);
return (1);
}
void
acpitz_attach(struct device *parent, struct device *self, void *aux)
{
struct acpitz_softc *sc = (struct acpitz_softc *)self;
struct acpi_attach_args *aa = aux;
struct aml_value res, env;
sc->sc_acpi = (struct acpi_softc *)parent;
sc->sc_devnode = aa->aaa_node->child;
rw_init(&sc->sc_lock, "acpitz");
memset(&res, 0, sizeof(res));
memset(&env, 0, sizeof(env));
sc->sc_tmp = -1;
sc->sc_crt = -1;
if (-1 == (sc->sc_tmp = acpitz_getreading(sc, "_TMP"))) {
printf(", failed to read _TMP");
return;
}
if (-1 == (sc->sc_crt = acpitz_getreading(sc, "_CRT"))) {
printf(", no critical temperature defined!");
sc->sc_crt = 0;
} else
printf(", critical temperature: %u degC",
(unsigned)(sc->sc_crt - 2732) / 10);
aml_register_notify(sc->sc_devnode->parent, NULL,
acpitz_notify, sc);
memset(&sc->sc_sens, 0, sizeof(sc->sc_sens));
strlcpy(sc->sc_sens.device, DEVNAME(sc), sizeof(sc->sc_sens.device));
strlcpy(sc->sc_sens.desc, "zone temperature",
sizeof(sc->sc_sens.desc));
sc->sc_sens.type = SENSOR_TEMP;
sensor_add(&sc->sc_sens);
sc->sc_sens.value = 0;
if (sensor_task_register(sc, acpitz_refresh, 10))
printf(", unable to register update task");
printf("\n");
}
void
acpitz_refresh(void *arg)
{
struct acpitz_softc *sc = arg;
extern int acpi_s5;
dnprintf(30, "%s: %s: refresh\n", DEVNAME(sc),
sc->sc_devnode->parent->name);
if (-1 == (sc->sc_tmp = acpitz_getreading(sc, "_TMP"))) {
dnprintf(30, "%s: %s: failed to read temp!\n", DEVNAME(sc),
sc->sc_devnode->parent->name);
sc->sc_tmp = 0; /* XXX */
}
if (sc->sc_tmp != -1 && sc->sc_crt != -1 && sc->sc_crt <= sc->sc_tmp) {
/* Do critical shutdown */
printf("%s: Critical temperature, shutting down!\n",
DEVNAME(sc));
acpi_s5 = 1;
psignal(initproc, SIGUSR1);
/* NOTREACHED */
}
rw_enter_write(&sc->sc_lock);
sc->sc_sens.value = sc->sc_tmp * 100000;
rw_exit_write(&sc->sc_lock);
}
int
acpitz_getreading(struct acpitz_softc *sc, char *name)
{
struct aml_value res;
int rv = -1;
rw_enter_write(&sc->sc_lock);
if (aml_evalname(sc->sc_acpi, sc->sc_devnode, name, 0, NULL, &res)) {
dnprintf(10, "%s: no %s\n", DEVNAME(sc), name);
goto out;
}
rv = aml_val2int(&res);
out:
aml_freevalue(&res);
rw_exit_write(&sc->sc_lock);
return (rv);
}
int
acpitz_notify(struct aml_node *node, int notify_type, void *arg)
{
struct acpitz_softc *sc = arg;
u_int64_t crt;
dnprintf(10, "%s notify: %.2x %s\n", DEVNAME(sc), notify_type,
sc->sc_devnode->parent->name);
switch (notify_type) {
case 0x81: /* Operating Points changed */
crt = sc->sc_crt;
sc->sc_crt = acpitz_getreading(sc, "_CRT");
if (crt != sc->sc_crt)
printf("%s: critical temperature: %u degC",
DEVNAME(sc),
(unsigned)(sc->sc_crt - 2732) / 10);
break;
default:
break;
}
acpitz_refresh(sc);
return (0);
}
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