freebsd-dev/sys/dev/acpica/acpi_thermal.c
Mike Smith 5d131f355f Tidy up.
Don't print temperatures at attach time - they're usually wrong.

Use acpi_EvaluateInteger instead of doing things the hard way.
2001-01-31 09:33:51 +00:00

153 lines
4.0 KiB
C

/*-
* 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_ZEROC 2732
#define TZ_KELVTOC(x) (((x) - TZ_ZEROC) / 10), (((x) - TZ_ZEROC) % 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 void acpi_tz_check_tripping_point(void *context);
static void acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context);
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;
ACPI_STATUS status;
FUNCTION_TRACE(__FUNCTION__);
sc = device_get_softc(dev);
sc->tz_dev = dev;
sc->tz_handle = acpi_get_handle(dev);
AcpiInstallNotifyHandler(sc->tz_handle, ACPI_DEVICE_NOTIFY,
acpi_tz_notify_handler, dev);
/*
* Don't bother evaluating/printing the temperature at this point;
* on many systems it'll be bogus until the EC is running.
*/
return_VALUE(0);
}
static void
acpi_tz_check_tripping_point(void *context)
{
struct acpi_tz_softc *sc;
device_t dev = context;
ACPI_STATUS status;
int tp;
FUNCTION_TRACE(__FUNCTION__);
sc = device_get_softc(dev);
if ((status = acpi_EvaluateInteger(sc->tz_handle, "_TMP", &tp)) != AE_OK) {
device_printf(dev, "can't evaluate _TMP method - %s\n", acpi_strerror(status));
return_VOID;
}
device_printf(dev,"%d.%dC\n", TZ_KELVTOC(tp));
return_VOID;
}
#define ACPI_TZ_STATUS_CHANGE 0x80
#define ACPI_TZ_TRIPPOINT_CHANGE 0x81
static void
acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
{
FUNCTION_TRACE(__FUNCTION__);
switch(notify){
case ACPI_TZ_STATUS_CHANGE:
case ACPI_TZ_TRIPPOINT_CHANGE:
/*Check trip point*/
AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_tz_check_tripping_point, context);
break;
}
return_VOID;
}