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.
133 lines
3.6 KiB
C
133 lines
3.6 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 SYSTEM_CONTROL
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MODULE_NAME("TIMER")
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#define ACPITIMER_MAGIC 0x524d4954 /* "TIMR" */
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struct acpi_timer_softc {
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device_t tm_dev;
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};
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static void acpi_timer_identify(driver_t *driver, device_t parent);
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static int acpi_timer_probe(device_t dev);
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static int acpi_timer_attach(device_t dev);
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static device_method_t acpi_timer_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, acpi_timer_identify),
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DEVMETHOD(device_probe, acpi_timer_probe),
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DEVMETHOD(device_attach, acpi_timer_attach),
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{0, 0}
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};
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static driver_t acpi_timer_driver = {
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"acpi_timer",
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acpi_timer_methods,
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sizeof(struct acpi_timer_softc),
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};
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devclass_t acpi_timer_devclass;
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DRIVER_MODULE(acpi_timer, acpi, acpi_timer_driver, acpi_timer_devclass, 0, 0);
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static void
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acpi_timer_identify(driver_t *driver, device_t parent)
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{
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static FADT_DESCRIPTOR_REV1 fadt;
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ACPI_BUFFER buf;
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ACPI_STATUS status;
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device_t dev;
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char desc[40];
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FUNCTION_TRACE(__FUNCTION__);
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if (acpi_disabled("timer"))
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return_VOID;
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buf.Pointer = &fadt;
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buf.Length = sizeof(fadt);
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if ((status = AcpiGetTable(ACPI_TABLE_FADT, 1, &buf)) != AE_OK) {
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device_printf(parent, "can't locate FADT - %s\n", acpi_strerror(status));
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return_VOID;
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}
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if (buf.Length != sizeof(fadt)) {
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device_printf(parent, "invalid FADT\n");
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return_VOID;
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}
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if ((dev = BUS_ADD_CHILD(parent, 0, "acpi_timer", 0)) == NULL) {
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device_printf(parent, "could not add acpi_timer0\n");
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return_VOID;
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}
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if (acpi_set_magic(dev, ACPITIMER_MAGIC)) {
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device_printf(dev, "could not set magic\n");
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return_VOID;
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}
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sprintf(desc, "%d-bit timer at 3.579545MHz", fadt.TmrValExt ? 32 : 24);
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device_set_desc_copy(dev, desc);
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return_VOID;
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}
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static int
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acpi_timer_probe(device_t dev)
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{
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if (acpi_get_magic(dev) == ACPITIMER_MAGIC)
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return(0);
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return(ENXIO);
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}
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static int
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acpi_timer_attach(device_t dev)
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{
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struct acpi_timer_softc *sc;
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FUNCTION_TRACE(__FUNCTION__);
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sc = device_get_softc(dev);
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sc->tm_dev = dev;
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return_VALUE(0);
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}
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