fdef51d350
some machines to enable wake events for more devices although I haven't seen a system yet that uses this form. Also, introduce acpi_GetReference() which retrieves an object reference from various types.
157 lines
3.7 KiB
C
157 lines
3.7 KiB
C
/*-
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* Copyright (c) 2003 Nate Lawson
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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 <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/sbuf.h>
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#include <machine/bus_pio.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.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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* Package manipulation convenience functions
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*/
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int
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acpi_PkgInt(ACPI_OBJECT *res, int idx, ACPI_INTEGER *dst)
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{
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ACPI_OBJECT *obj;
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obj = &res->Package.Elements[idx];
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if (obj == NULL || obj->Type != ACPI_TYPE_INTEGER)
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return (EINVAL);
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*dst = obj->Integer.Value;
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return (0);
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}
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int
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acpi_PkgInt32(ACPI_OBJECT *res, int idx, uint32_t *dst)
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{
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ACPI_INTEGER tmp;
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int error;
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error = acpi_PkgInt(res, idx, &tmp);
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if (error == 0)
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*dst = (uint32_t)tmp;
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return (error);
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}
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int
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acpi_PkgStr(ACPI_OBJECT *res, int idx, void *dst, size_t size)
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{
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ACPI_OBJECT *obj;
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void *ptr;
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size_t length;
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obj = &res->Package.Elements[idx];
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if (obj == NULL)
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return (EINVAL);
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bzero(dst, sizeof(dst));
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switch (obj->Type) {
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case ACPI_TYPE_STRING:
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ptr = obj->String.Pointer;
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length = obj->String.Length;
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break;
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case ACPI_TYPE_BUFFER:
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ptr = obj->Buffer.Pointer;
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length = obj->Buffer.Length;
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break;
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default:
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return (EINVAL);
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}
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/* Make sure string will fit, including terminating NUL */
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if (++length > size)
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return (E2BIG);
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strlcpy(dst, ptr, length);
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return (0);
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}
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int
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acpi_PkgGas(device_t dev, ACPI_OBJECT *res, int idx, int *rid,
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struct resource **dst)
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{
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ACPI_GENERIC_ADDRESS gas;
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ACPI_OBJECT *obj;
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obj = &res->Package.Elements[idx];
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if (obj == NULL || obj->Type != ACPI_TYPE_BUFFER ||
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obj->Buffer.Length < sizeof(ACPI_GENERIC_ADDRESS) + 3) {
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return (EINVAL);
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}
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memcpy(&gas, obj->Buffer.Pointer + 3, sizeof(gas));
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*dst = acpi_bus_alloc_gas(dev, rid, &gas);
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if (*dst == NULL)
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return (ENXIO);
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return (0);
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}
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ACPI_HANDLE
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acpi_GetReference(ACPI_HANDLE scope, ACPI_OBJECT *obj)
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{
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ACPI_HANDLE h;
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if (obj == NULL)
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return (NULL);
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switch (obj->Type) {
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case ACPI_TYPE_LOCAL_REFERENCE:
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case ACPI_TYPE_ANY:
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h = obj->Reference.Handle;
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break;
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case ACPI_TYPE_STRING:
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/*
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* The String object usually contains a fully-qualified path, so
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* scope can be NULL.
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*
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* XXX This may not always be the case.
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*/
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if (ACPI_FAILURE(AcpiGetHandle(scope, obj->String.Pointer, &h)))
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h = NULL;
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break;
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default:
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h = NULL;
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break;
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}
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return (h);
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}
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