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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 SYSTEM_CONTROL
MODULE_NAME("TIMER")
#define ACPITIMER_MAGIC 0x524d4954 /* "TIMR" */
struct acpi_timer_softc {
device_t tm_dev;
};
static void acpi_timer_identify(driver_t *driver, device_t parent);
static int acpi_timer_probe(device_t dev);
static int acpi_timer_attach(device_t dev);
static device_method_t acpi_timer_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, acpi_timer_identify),
DEVMETHOD(device_probe, acpi_timer_probe),
DEVMETHOD(device_attach, acpi_timer_attach),
{0, 0}
};
static driver_t acpi_timer_driver = {
"acpi_timer",
acpi_timer_methods,
sizeof(struct acpi_timer_softc),
};
devclass_t acpi_timer_devclass;
DRIVER_MODULE(acpi_timer, acpi, acpi_timer_driver, acpi_timer_devclass, 0, 0);
static void
acpi_timer_identify(driver_t *driver, device_t parent)
{
device_t dev;
char desc[40];
FUNCTION_TRACE(__FUNCTION__);
if (acpi_disabled("timer"))
return_VOID;
if (AcpiGbl_FADT == NULL)
return_VOID;
if ((dev = BUS_ADD_CHILD(parent, 0, "acpi_timer", 0)) == NULL) {
device_printf(parent, "could not add acpi_timer0\n");
return_VOID;
}
if (acpi_set_magic(dev, ACPITIMER_MAGIC)) {
device_printf(dev, "could not set magic\n");
return_VOID;
}
sprintf(desc, "%d-bit timer at 3.579545MHz", AcpiGbl_FADT->TmrValExt ? 32 : 24);
device_set_desc_copy(dev, desc);
return_VOID;
}
static int
acpi_timer_probe(device_t dev)
{
if (acpi_get_magic(dev) == ACPITIMER_MAGIC)
return(0);
return(ENXIO);
}
static int
acpi_timer_attach(device_t dev)
{
struct acpi_timer_softc *sc;
FUNCTION_TRACE(__FUNCTION__);
sc = device_get_softc(dev);
sc->tm_dev = dev;
return_VALUE(0);
}
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