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219 lines
7.5 KiB
C
219 lines
7.5 KiB
C
/*******************************************************************************
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*
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* Module Name: rsxface - Public interfaces to the ACPI subsystem
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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_RESOURCES
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MODULE_NAME ("rsxface")
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/*******************************************************************************
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*
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* FUNCTION: Acpi_get_irq_routing_table
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*
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* PARAMETERS: Device_handle - a handle to the Bus device we are querying
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* Ret_buffer - a pointer to a buffer to receive the
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* current resources for the device
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*
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* RETURN: Status - the status of the call
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*
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* DESCRIPTION: This function is called to get the IRQ routing table for a
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* specific bus. The caller must first acquire a handle for the
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* desired bus. The routine table is placed in the buffer pointed
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* to by the Ret_buffer variable parameter.
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*
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* If the function fails an appropriate status will be returned
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* and the value of Ret_buffer is undefined.
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*
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* This function attempts to execute the _PRT method contained in
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* the object indicated by the passed Device_handle.
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_get_irq_routing_table (
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ACPI_HANDLE device_handle,
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ACPI_BUFFER *ret_buffer)
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{
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ACPI_STATUS status;
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/*
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* Must have a valid handle and buffer, So we have to have a handle
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* and a return buffer structure, and if there is a non-zero buffer length
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* we also need a valid pointer in the buffer. If it's a zero buffer length,
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* we'll be returning the needed buffer size, so keep going.
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*/
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if ((!device_handle) ||
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(!ret_buffer) ||
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((!ret_buffer->pointer) && (ret_buffer->length))) {
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return (AE_BAD_PARAMETER);
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}
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status = acpi_rs_get_prt_method_data (device_handle, ret_buffer);
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return (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: Acpi_get_current_resources
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*
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* PARAMETERS: Device_handle - a handle to the device object for the
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* device we are querying
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* Ret_buffer - a pointer to a buffer to receive the
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* current resources for the device
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*
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* RETURN: Status - the status of the call
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*
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* DESCRIPTION: This function is called to get the current resources for a
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* specific device. The caller must first acquire a handle for
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* the desired device. The resource data is placed in the buffer
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* pointed to by the Ret_buffer variable parameter.
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*
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* If the function fails an appropriate status will be returned
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* and the value of Ret_buffer is undefined.
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*
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* This function attempts to execute the _CRS method contained in
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* the object indicated by the passed Device_handle.
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_get_current_resources (
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ACPI_HANDLE device_handle,
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ACPI_BUFFER *ret_buffer)
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{
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ACPI_STATUS status;
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/*
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* Must have a valid handle and buffer, So we have to have a handle
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* and a return buffer structure, and if there is a non-zero buffer length
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* we also need a valid pointer in the buffer. If it's a zero buffer length,
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* we'll be returning the needed buffer size, so keep going.
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*/
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if ((!device_handle) ||
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(!ret_buffer) ||
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((ret_buffer->length) && (!ret_buffer->pointer))) {
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return (AE_BAD_PARAMETER);
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}
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status = acpi_rs_get_crs_method_data (device_handle, ret_buffer);
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return (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: Acpi_get_possible_resources
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*
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* PARAMETERS: Device_handle - a handle to the device object for the
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* device we are querying
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* Ret_buffer - a pointer to a buffer to receive the
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* resources for the device
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*
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* RETURN: Status - the status of the call
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*
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* DESCRIPTION: This function is called to get a list of the possible resources
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* for a specific device. The caller must first acquire a handle
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* for the desired device. The resource data is placed in the
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* buffer pointed to by the Ret_buffer variable.
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*
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* If the function fails an appropriate status will be returned
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* and the value of Ret_buffer is undefined.
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_get_possible_resources (
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ACPI_HANDLE device_handle,
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ACPI_BUFFER *ret_buffer)
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{
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ACPI_STATUS status;
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/*
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* Must have a valid handle and buffer, So we have to have a handle
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* and a return buffer structure, and if there is a non-zero buffer length
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* we also need a valid pointer in the buffer. If it's a zero buffer length,
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* we'll be returning the needed buffer size, so keep going.
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*/
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if ((!device_handle) ||
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(!ret_buffer) ||
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((ret_buffer->length) && (!ret_buffer->pointer))) {
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return (AE_BAD_PARAMETER);
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}
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status = acpi_rs_get_prs_method_data (device_handle, ret_buffer);
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return (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: Acpi_set_current_resources
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*
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* PARAMETERS: Device_handle - a handle to the device object for the
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* device we are changing the resources of
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* In_buffer - a pointer to a buffer containing the
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* resources to be set for the device
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*
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* RETURN: Status - the status of the call
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*
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* DESCRIPTION: This function is called to set the current resources for a
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* specific device. The caller must first acquire a handle for
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* the desired device. The resource data is passed to the routine
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* the buffer pointed to by the In_buffer variable.
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_set_current_resources (
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ACPI_HANDLE device_handle,
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ACPI_BUFFER *in_buffer)
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{
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ACPI_STATUS status;
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/*
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* Must have a valid handle and buffer
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*/
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if ((!device_handle) ||
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(!in_buffer) ||
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(!in_buffer->pointer) ||
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(!in_buffer->length)) {
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return (AE_BAD_PARAMETER);
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}
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status = acpi_rs_set_srs_method_data (device_handle, in_buffer);
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return (status);
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}
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