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/*-
* Copyright (c) 2000 Michael Smith
* Copyright (c) 2000 BSDi
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
#include "opt_acpi.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include "acpi.h"
#include <dev/acpica/acpivar.h>
/*
* Hooks for the ACPI CA debugging infrastructure
*/
#define _COMPONENT THERMAL_CONTROL
MODULE_NAME("THERMAL")
#define TZ_KELVTOC(x) (((x) - 2732) / 10), (((x) - 2732) % 10)
struct acpi_tz_softc {
device_t tz_dev;
ACPI_HANDLE tz_handle;
};
static int acpi_tz_probe(device_t dev);
static int acpi_tz_attach(device_t dev);
static device_method_t acpi_tz_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, acpi_tz_probe),
DEVMETHOD(device_attach, acpi_tz_attach),
{0, 0}
};
static driver_t acpi_tz_driver = {
"acpi_tz",
acpi_tz_methods,
sizeof(struct acpi_tz_softc),
};
devclass_t acpi_tz_devclass;
DRIVER_MODULE(acpi_tz, acpi, acpi_tz_driver, acpi_tz_devclass, 0, 0);
static int
acpi_tz_probe(device_t dev)
{
FUNCTION_TRACE(__FUNCTION__);
if ((acpi_get_type(dev) == ACPI_TYPE_THERMAL) &&
!acpi_disabled("thermal")) {
device_set_desc(dev, "thermal zone");
return_VALUE(0);
}
return_VALUE(ENXIO);
}
static int
acpi_tz_attach(device_t dev)
{
struct acpi_tz_softc *sc;
UINT32 param[4];
ACPI_BUFFER buf;
ACPI_STATUS status;
FUNCTION_TRACE(__FUNCTION__);
sc = device_get_softc(dev);
sc->tz_dev = dev;
sc->tz_handle = acpi_get_handle(dev);
buf.Pointer = ¶m[0];
buf.Length = sizeof(param);
if ((status = AcpiEvaluateObject(sc->tz_handle, "_TMP", NULL, &buf)) != AE_OK) {
device_printf(sc->tz_dev, "can't fetch temperature - %s\n", acpi_strerror(status));
return_VALUE(ENXIO);
}
if (param[0] != ACPI_TYPE_NUMBER) {
device_printf(sc->tz_dev, "%s._TMP does not evaluate to ACPI_TYPE_NUMBER\n",
acpi_name(sc->tz_handle));
return_VALUE(ENXIO);
}
device_printf(sc->tz_dev, "current temperature %d.%dC\n", TZ_KELVTOC(param[1]));
return_VALUE(0);
}
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