0ae554237c
infrastructure. It's not perfect, but it's a lot better than what
we've been using so far. The following rules apply to this:
o BSD component names should be capitalised
o Layer names should be taken from the non-CA set for now. We
may elect to add some new BSD-specific layers later.
- Make it possible to turn off selective debugging flags or layers
by listing them in debug.acpi.layer or debug.acpi.level prefixed
with !.
- Fully implement support for avoiding nodes in the ACPI namespace.
Nodes may be listed in the debug.acpi.avoid environment variable;
these nodes and all their children will be ignored (although still
scanned over) by ACPI functions which scan the namespace. Multiple
nodes can be specified, separated by whitespace.
- Implement support for selectively disabling ACPI subsystem components
via the debug.acpi.disable environment variable. The following
components can be disabled:
o bus creation/scanning of the ACPI 'bus'
o children attachment of children to the ACPI 'bus'
o button the acpi_button control-method button driver
o ec the acpi_ec embedded-controller driver
o isa acpi replacement of PnP BIOS for ISA device discovery
o lid the control-method lid switch driver
o pci pci root-bus discovery
o processor CPU power/speed management
o thermal system temperature detection and control
o timer ACPI timecounter
Multiple components may be disabled by specifying their name(s)
separated by whitespace.
- Add support for ioctl registration. ACPI subsystem components may
register ioctl handlers with the /dev/acpi generic ioctl handler,
allowing us to avoid the need for a multitude of /dev/acpi* control
devices, etc.
115 lines
3.3 KiB
C
115 lines
3.3 KiB
C
/*-
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* Copyright (c) 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include "opt_acpi.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include "acpi.h"
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#include <dev/acpica/acpivar.h>
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/*
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* Hooks for the ACPI CA debugging infrastructure
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*/
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#define _COMPONENT THERMAL_CONTROL
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MODULE_NAME("THERMAL")
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#define TZ_KELVTOC(x) (((x) - 2732) / 10), (((x) - 2732) % 10)
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struct acpi_tz_softc {
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device_t tz_dev;
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ACPI_HANDLE tz_handle;
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};
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static int acpi_tz_probe(device_t dev);
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static int acpi_tz_attach(device_t dev);
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static device_method_t acpi_tz_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, acpi_tz_probe),
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DEVMETHOD(device_attach, acpi_tz_attach),
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{0, 0}
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};
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static driver_t acpi_tz_driver = {
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"acpi_tz",
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acpi_tz_methods,
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sizeof(struct acpi_tz_softc),
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};
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devclass_t acpi_tz_devclass;
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DRIVER_MODULE(acpi_tz, acpi, acpi_tz_driver, acpi_tz_devclass, 0, 0);
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static int
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acpi_tz_probe(device_t dev)
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{
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FUNCTION_TRACE(__FUNCTION__);
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if ((acpi_get_type(dev) == ACPI_TYPE_THERMAL) &&
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!acpi_disabled("thermal")) {
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device_set_desc(dev, "thermal zone");
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return_VALUE(0);
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}
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return_VALUE(ENXIO);
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}
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static int
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acpi_tz_attach(device_t dev)
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{
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struct acpi_tz_softc *sc;
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UINT32 param[4];
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ACPI_BUFFER buf;
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ACPI_STATUS status;
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FUNCTION_TRACE(__FUNCTION__);
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sc = device_get_softc(dev);
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sc->tz_dev = dev;
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sc->tz_handle = acpi_get_handle(dev);
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buf.Pointer = ¶m[0];
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buf.Length = sizeof(param);
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if ((status = AcpiEvaluateObject(sc->tz_handle, "_TMP", NULL, &buf)) != AE_OK) {
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device_printf(sc->tz_dev, "can't fetch temperature - %s\n", acpi_strerror(status));
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return_VALUE(ENXIO);
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}
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if (param[0] != ACPI_TYPE_NUMBER) {
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device_printf(sc->tz_dev, "%s._TMP does not evaluate to ACPI_TYPE_NUMBER\n",
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acpi_name(sc->tz_handle));
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return_VALUE(ENXIO);
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}
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device_printf(sc->tz_dev, "current temperature %d.%dC\n", TZ_KELVTOC(param[1]));
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return_VALUE(0);
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}
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