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/******************************************************************************
*
* Module Name: cmeval - Object evaluation
* $Revision: 14 $
*
*****************************************************************************/
/*
* Copyright (C) 2000 R. Byron Moore
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "acpi.h"
#include "acnamesp.h"
#include "acinterp.h"
#define _COMPONENT MISCELLANEOUS
MODULE_NAME ("cmeval")
/****************************************************************************
*
* FUNCTION: Acpi_cm_evaluate_numeric_object
*
* PARAMETERS: Device_node - Node for the device
* *Address - Where the value is returned
*
* RETURN: Status
*
* DESCRIPTION: evaluates a numeric namespace object for a selected device
* and stores results in *Address.
*
* NOTE: Internal function, no parameter validation
*
***************************************************************************/
ACPI_STATUS
acpi_cm_evaluate_numeric_object (
NATIVE_CHAR *object_name,
ACPI_NAMESPACE_NODE *device_node,
u32 *address)
{
ACPI_OPERAND_OBJECT *obj_desc;
ACPI_STATUS status;
/* Execute the method */
status = acpi_ns_evaluate_relative (device_node, object_name, NULL, &obj_desc);
if (ACPI_FAILURE (status)) {
return (status);
}
/* Did we get a return object? */
if (!obj_desc) {
return (AE_TYPE);
}
/* Is the return object of the correct type? */
if (obj_desc->common.type != ACPI_TYPE_NUMBER) {
status = AE_TYPE;
}
else {
/*
* Since the structure is a union, setting any field will set all
* of the variables in the union
*/
*address = obj_desc->number.value;
}
/* On exit, we must delete the return object */
acpi_cm_remove_reference (obj_desc);
return (status);
}
/****************************************************************************
*
* FUNCTION: Acpi_cm_execute_HID
*
* PARAMETERS: Device_node - Node for the device
* *Hid - Where the HID is returned
*
* RETURN: Status
*
* DESCRIPTION: Executes the _HID control method that returns the hardware
* ID of the device.
*
* NOTE: Internal function, no parameter validation
*
***************************************************************************/
ACPI_STATUS
acpi_cm_execute_HID (
ACPI_NAMESPACE_NODE *device_node,
DEVICE_ID *hid)
{
ACPI_OPERAND_OBJECT *obj_desc;
ACPI_STATUS status;
/* Execute the method */
status = acpi_ns_evaluate_relative (device_node,
METHOD_NAME__HID, NULL, &obj_desc);
if (ACPI_FAILURE (status)) {
return (status);
}
/* Did we get a return object? */
if (!obj_desc) {
return (AE_TYPE);
}
/*
* A _HID can return either a Number (32 bit compressed EISA ID) or
* a string
*/
if ((obj_desc->common.type != ACPI_TYPE_NUMBER) &&
(obj_desc->common.type != ACPI_TYPE_STRING))
{
status = AE_TYPE;
}
else {
if (obj_desc->common.type == ACPI_TYPE_NUMBER) {
/* Convert the Numeric HID to string */
acpi_aml_eisa_id_to_string (obj_desc->number.value, hid->data.buffer);
hid->type = STRING_DEVICE_ID;
}
else {
/* Copy the String HID from the returned object */
hid->data.string_ptr = obj_desc->string.pointer;
hid->type = STRING_PTR_DEVICE_ID;
}
}
/* On exit, we must delete the return object */
acpi_cm_remove_reference (obj_desc);
return (status);
}
/****************************************************************************
*
* FUNCTION: Acpi_cm_execute_UID
*
* PARAMETERS: Device_node - Node for the device
* *Uid - Where the UID is returned
*
* RETURN: Status
*
* DESCRIPTION: Executes the _UID control method that returns the hardware
* ID of the device.
*
* NOTE: Internal function, no parameter validation
*
***************************************************************************/
ACPI_STATUS
acpi_cm_execute_UID (
ACPI_NAMESPACE_NODE *device_node,
DEVICE_ID *uid)
{
ACPI_OPERAND_OBJECT *obj_desc;
ACPI_STATUS status;
/* Execute the method */
status = acpi_ns_evaluate_relative (device_node,
METHOD_NAME__UID, NULL, &obj_desc);
if (ACPI_FAILURE (status)) {
return (status);
}
/* Did we get a return object? */
if (!obj_desc) {
return (AE_TYPE);
}
/*
* A _UID can return either a Number (32 bit compressed EISA ID) or
* a string
*/
if ((obj_desc->common.type != ACPI_TYPE_NUMBER) &&
(obj_desc->common.type != ACPI_TYPE_STRING))
{
status = AE_TYPE;
}
else {
if (obj_desc->common.type == ACPI_TYPE_NUMBER) {
/* Convert the Numeric HID to string */
uid->data.number = obj_desc->number.value;
}
else {
/* Copy the String HID from the returned object */
uid->data.string_ptr = obj_desc->string.pointer;
uid->type = STRING_PTR_DEVICE_ID;
}
}
/* On exit, we must delete the return object */
acpi_cm_remove_reference (obj_desc);
return (status);
}
/****************************************************************************
*
* FUNCTION: Acpi_cm_execute_STA
*
* PARAMETERS: Device_node - Node for the device
* *Flags - Where the status flags are returned
*
* RETURN: Status
*
* DESCRIPTION: Executes _STA for selected device and stores results in
* *Flags.
*
* NOTE: Internal function, no parameter validation
*
***************************************************************************/
ACPI_STATUS
acpi_cm_execute_STA (
ACPI_NAMESPACE_NODE *device_node,
u32 *flags)
{
ACPI_OPERAND_OBJECT *obj_desc;
ACPI_STATUS status;
/* Execute the method */
status = acpi_ns_evaluate_relative (device_node,
METHOD_NAME__STA, NULL, &obj_desc);
if (ACPI_FAILURE (status)) {
return (status);
}
/* Did we get a return object? */
if (!obj_desc) {
return (AE_TYPE);
}
/* Is the return object of the correct type? */
if (obj_desc->common.type != ACPI_TYPE_NUMBER) {
status = AE_TYPE;
}
else {
/* Extract the status flags */
*flags = obj_desc->number.value;
}
/* On exit, we must delete the return object */
acpi_cm_remove_reference (obj_desc);
return (status);
}
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