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304 lines
7 KiB
C
304 lines
7 KiB
C
/******************************************************************************
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*
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* Module Name: cmeval - Object evaluation
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* $Revision: 1.1 $
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000, 2001 R. Byron Moore
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <acpi.h>
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#define _COMPONENT ACPI_UTILITIES
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MODULE_NAME ("cmeval")
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/****************************************************************************
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*
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* FUNCTION: Acpi_cm_evaluate_numeric_object
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*
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* PARAMETERS: *Object_name - Object name to be evaluated
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* Device_node - Node for the device
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* *Address - Where the value is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: evaluates a numeric namespace object for a selected device
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* and stores results in *Address.
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*
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* NOTE: Internal function, no parameter validation
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*
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***************************************************************************/
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ACPI_STATUS
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acpi_cm_evaluate_numeric_object (
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NATIVE_CHAR *object_name,
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ACPI_NAMESPACE_NODE *device_node,
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ACPI_INTEGER *address)
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{
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ACPI_OPERAND_OBJECT *obj_desc;
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ACPI_STATUS status;
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/* Execute the method */
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status = acpi_ns_evaluate_relative (device_node, object_name, NULL, &obj_desc);
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if (ACPI_FAILURE (status)) {
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return (status);
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}
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/* Did we get a return object? */
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if (!obj_desc) {
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return (AE_TYPE);
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}
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/* Is the return object of the correct type? */
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if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
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status = AE_TYPE;
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}
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else {
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/*
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* Since the structure is a union, setting any field will set all
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* of the variables in the union
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*/
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*address = obj_desc->integer.value;
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}
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/* On exit, we must delete the return object */
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acpi_cm_remove_reference (obj_desc);
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return (status);
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}
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/****************************************************************************
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*
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* FUNCTION: Acpi_cm_execute_HID
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*
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* PARAMETERS: Device_node - Node for the device
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* *Hid - Where the HID is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Executes the _HID control method that returns the hardware
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* ID of the device.
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*
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* NOTE: Internal function, no parameter validation
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*
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***************************************************************************/
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ACPI_STATUS
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acpi_cm_execute_HID (
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ACPI_NAMESPACE_NODE *device_node,
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DEVICE_ID *hid)
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{
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ACPI_OPERAND_OBJECT *obj_desc;
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ACPI_STATUS status;
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/* Execute the method */
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status = acpi_ns_evaluate_relative (device_node,
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METHOD_NAME__HID, NULL, &obj_desc);
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if (ACPI_FAILURE (status)) {
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return (status);
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}
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/* Did we get a return object? */
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if (!obj_desc) {
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return (AE_TYPE);
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}
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/*
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* A _HID can return either a Number (32 bit compressed EISA ID) or
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* a string
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*/
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if ((obj_desc->common.type != ACPI_TYPE_INTEGER) &&
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(obj_desc->common.type != ACPI_TYPE_STRING)) {
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status = AE_TYPE;
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}
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else {
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if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
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/* Convert the Numeric HID to string */
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acpi_aml_eisa_id_to_string ((u32) obj_desc->integer.value, hid->buffer);
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}
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else {
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/* Copy the String HID from the returned object */
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STRNCPY(hid->buffer, obj_desc->string.pointer, sizeof(hid->buffer));
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}
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}
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/* On exit, we must delete the return object */
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acpi_cm_remove_reference (obj_desc);
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return (status);
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}
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/****************************************************************************
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*
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* FUNCTION: Acpi_cm_execute_UID
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*
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* PARAMETERS: Device_node - Node for the device
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* *Uid - Where the UID is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Executes the _UID control method that returns the hardware
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* ID of the device.
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*
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* NOTE: Internal function, no parameter validation
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*
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***************************************************************************/
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ACPI_STATUS
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acpi_cm_execute_UID (
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ACPI_NAMESPACE_NODE *device_node,
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DEVICE_ID *uid)
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{
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ACPI_OPERAND_OBJECT *obj_desc;
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ACPI_STATUS status;
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/* Execute the method */
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status = acpi_ns_evaluate_relative (device_node,
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METHOD_NAME__UID, NULL, &obj_desc);
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if (ACPI_FAILURE (status)) {
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return (status);
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}
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/* Did we get a return object? */
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if (!obj_desc) {
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return (AE_TYPE);
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}
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/*
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* A _UID can return either a Number (32 bit compressed EISA ID) or
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* a string
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*/
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if ((obj_desc->common.type != ACPI_TYPE_INTEGER) &&
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(obj_desc->common.type != ACPI_TYPE_STRING)) {
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status = AE_TYPE;
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}
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else {
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if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
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/* Convert the Numeric UID to string */
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acpi_aml_unsigned_integer_to_string (obj_desc->integer.value, uid->buffer);
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}
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else {
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/* Copy the String UID from the returned object */
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STRNCPY(uid->buffer, obj_desc->string.pointer, sizeof(uid->buffer));
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}
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}
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/* On exit, we must delete the return object */
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acpi_cm_remove_reference (obj_desc);
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return (status);
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}
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/****************************************************************************
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*
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* FUNCTION: Acpi_cm_execute_STA
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*
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* PARAMETERS: Device_node - Node for the device
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* *Flags - Where the status flags are returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Executes _STA for selected device and stores results in
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* *Flags.
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*
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* NOTE: Internal function, no parameter validation
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*
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***************************************************************************/
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ACPI_STATUS
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acpi_cm_execute_STA (
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ACPI_NAMESPACE_NODE *device_node,
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u32 *flags)
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{
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ACPI_OPERAND_OBJECT *obj_desc;
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ACPI_STATUS status;
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/* Execute the method */
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status = acpi_ns_evaluate_relative (device_node,
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METHOD_NAME__STA, NULL, &obj_desc);
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if (AE_NOT_FOUND == status) {
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*flags = 0x0F;
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status = AE_OK;
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}
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else /* success */ {
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/* Did we get a return object? */
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if (!obj_desc) {
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return (AE_TYPE);
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}
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/* Is the return object of the correct type? */
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if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
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status = AE_TYPE;
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}
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else {
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/* Extract the status flags */
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*flags = (u32) obj_desc->integer.value;
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}
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/* On exit, we must delete the return object */
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acpi_cm_remove_reference (obj_desc);
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}
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return (status);
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}
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