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527 lines
14 KiB
C
527 lines
14 KiB
C
/*******************************************************************************
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*
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* Module Name: rsio - Acpi_rs_io_resource
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* Acpi_rs_fixed_io_resource
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* Acpi_rs_io_stream
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* Acpi_rs_fixed_io_stream
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* Acpi_rs_dma_resource
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* Acpi_rs_dma_stream
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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 ("rsio")
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/*******************************************************************************
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*
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* FUNCTION: Acpi_rs_io_resource
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*
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* PARAMETERS: Byte_stream_buffer - Pointer to the resource input byte
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* stream
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* Bytes_consumed - u32 pointer that is filled with
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* the number of bytes consumed from
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* the Byte_stream_buffer
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* Output_buffer - Pointer to the user's return buffer
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* Structure_size - u32 pointer that is filled with
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* the number of bytes in the filled
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* in structure
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*
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* RETURN: Status AE_OK if okay, else a valid ACPI_STATUS code
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*
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* DESCRIPTION: Take the resource byte stream and fill out the appropriate
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* structure pointed to by the Output_buffer. Return the
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* number of bytes consumed from the byte stream.
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_rs_io_resource (
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u8 *byte_stream_buffer,
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u32 *bytes_consumed,
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u8 **output_buffer,
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u32 *structure_size)
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{
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u8 *buffer = byte_stream_buffer;
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RESOURCE *output_struct = (RESOURCE *) * output_buffer;
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u16 temp16 = 0;
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u8 temp8 = 0;
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u32 struct_size = sizeof (IO_RESOURCE) +
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RESOURCE_LENGTH_NO_DATA;
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/*
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* The number of bytes consumed are Constant
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*/
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*bytes_consumed = 8;
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output_struct->id = io;
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/*
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* Check Decode
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*/
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buffer += 1;
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temp8 = *buffer;
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output_struct->data.io.io_decode = temp8 & 0x01;
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/*
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* Check Min_base Address
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*/
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buffer += 1;
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MOVE_UNALIGNED16_TO_16 (&temp16, buffer);
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output_struct->data.io.min_base_address = temp16;
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/*
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* Check Max_base Address
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*/
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buffer += 2;
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MOVE_UNALIGNED16_TO_16 (&temp16, buffer);
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output_struct->data.io.max_base_address = temp16;
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/*
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* Check Base alignment
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*/
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buffer += 2;
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temp8 = *buffer;
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output_struct->data.io.alignment = temp8;
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/*
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* Check Range_length
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*/
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buffer += 1;
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temp8 = *buffer;
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output_struct->data.io.range_length = temp8;
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/*
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* Set the Length parameter
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*/
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output_struct->length = struct_size;
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/*
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* Return the final size of the structure
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*/
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*structure_size = struct_size;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: Acpi_rs_fixed_io_resource
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*
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* PARAMETERS: Byte_stream_buffer - Pointer to the resource input byte
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* stream
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* Bytes_consumed - u32 pointer that is filled with
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* the number of bytes consumed from
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* the Byte_stream_buffer
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* Output_buffer - Pointer to the user's return buffer
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* Structure_size - u32 pointer that is filled with
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* the number of bytes in the filled
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* in structure
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*
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* RETURN: Status AE_OK if okay, else a valid ACPI_STATUS code
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*
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* DESCRIPTION: Take the resource byte stream and fill out the appropriate
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* structure pointed to by the Output_buffer. Return the
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* number of bytes consumed from the byte stream.
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_rs_fixed_io_resource (
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u8 *byte_stream_buffer,
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u32 *bytes_consumed,
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u8 **output_buffer,
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u32 *structure_size)
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{
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u8 *buffer = byte_stream_buffer;
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RESOURCE *output_struct = (RESOURCE *) * output_buffer;
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u16 temp16 = 0;
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u8 temp8 = 0;
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u32 struct_size = sizeof (FIXED_IO_RESOURCE) +
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RESOURCE_LENGTH_NO_DATA;
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/*
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* The number of bytes consumed are Constant
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*/
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*bytes_consumed = 4;
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output_struct->id = fixed_io;
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/*
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* Check Range Base Address
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*/
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buffer += 1;
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MOVE_UNALIGNED16_TO_16 (&temp16, buffer);
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output_struct->data.fixed_io.base_address = temp16;
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/*
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* Check Range_length
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*/
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buffer += 2;
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temp8 = *buffer;
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output_struct->data.fixed_io.range_length = temp8;
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/*
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* Set the Length parameter
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*/
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output_struct->length = struct_size;
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/*
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* Return the final size of the structure
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*/
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*structure_size = struct_size;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: Acpi_rs_io_stream
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*
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* PARAMETERS: Linked_list - Pointer to the resource linked list
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* Output_buffer - Pointer to the user's return buffer
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* Bytes_consumed - u32 pointer that is filled with
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* the number of bytes of the
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* Output_buffer used
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*
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* RETURN: Status AE_OK if okay, else a valid ACPI_STATUS code
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*
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* DESCRIPTION: Take the linked list resource structure and fills in the
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* the appropriate bytes in a byte stream
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_rs_io_stream (
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RESOURCE *linked_list,
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u8 **output_buffer,
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u32 *bytes_consumed)
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{
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u8 *buffer = *output_buffer;
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u16 temp16 = 0;
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u8 temp8 = 0;
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/*
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* The descriptor field is static
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*/
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*buffer = 0x47;
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buffer += 1;
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/*
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* Io Information Byte
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*/
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temp8 = (u8) (linked_list->data.io.io_decode & 0x01);
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*buffer = temp8;
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buffer += 1;
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/*
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* Set the Range minimum base address
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*/
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temp16 = (u16) linked_list->data.io.min_base_address;
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MOVE_UNALIGNED16_TO_16 (buffer, &temp16);
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buffer += 2;
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/*
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* Set the Range maximum base address
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*/
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temp16 = (u16) linked_list->data.io.max_base_address;
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MOVE_UNALIGNED16_TO_16 (buffer, &temp16);
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buffer += 2;
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/*
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* Set the base alignment
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*/
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temp8 = (u8) linked_list->data.io.alignment;
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*buffer = temp8;
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buffer += 1;
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/*
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* Set the range length
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*/
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temp8 = (u8) linked_list->data.io.range_length;
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*buffer = temp8;
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buffer += 1;
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/*
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* Return the number of bytes consumed in this operation
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*/
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*bytes_consumed = (u32) ((NATIVE_UINT) buffer -
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(NATIVE_UINT) *output_buffer);
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: Acpi_rs_fixed_io_stream
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*
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* PARAMETERS: Linked_list - Pointer to the resource linked list
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* Output_buffer - Pointer to the user's return buffer
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* Bytes_consumed - u32 pointer that is filled with
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* the number of bytes of the
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* Output_buffer used
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*
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* RETURN: Status AE_OK if okay, else a valid ACPI_STATUS code
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*
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* DESCRIPTION: Take the linked list resource structure and fills in the
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* the appropriate bytes in a byte stream
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_rs_fixed_io_stream (
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RESOURCE *linked_list,
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u8 **output_buffer,
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u32 *bytes_consumed)
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{
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u8 *buffer = *output_buffer;
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u16 temp16 = 0;
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u8 temp8 = 0;
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/*
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* The descriptor field is static
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*/
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*buffer = 0x4B;
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buffer += 1;
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/*
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* Set the Range base address
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*/
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temp16 = (u16) linked_list->data.fixed_io.base_address;
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MOVE_UNALIGNED16_TO_16 (buffer, &temp16);
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buffer += 2;
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/*
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* Set the range length
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*/
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temp8 = (u8) linked_list->data.fixed_io.range_length;
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*buffer = temp8;
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buffer += 1;
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/*
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* Return the number of bytes consumed in this operation
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*/
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*bytes_consumed = (u32) ((NATIVE_UINT) buffer -
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(NATIVE_UINT) *output_buffer);
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: Acpi_rs_dma_resource
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*
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* PARAMETERS: Byte_stream_buffer - Pointer to the resource input byte
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* stream
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* Bytes_consumed - u32 pointer that is filled with
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* the number of bytes consumed from
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* the Byte_stream_buffer
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* Output_buffer - Pointer to the user's return buffer
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* Structure_size - u32 pointer that is filled with
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* the number of bytes in the filled
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* in structure
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*
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* RETURN: Status AE_OK if okay, else a valid ACPI_STATUS code
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*
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* DESCRIPTION: Take the resource byte stream and fill out the appropriate
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* structure pointed to by the Output_buffer. Return the
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* number of bytes consumed from the byte stream.
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_rs_dma_resource (
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u8 *byte_stream_buffer,
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u32 *bytes_consumed,
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u8 **output_buffer,
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u32 *structure_size)
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{
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u8 *buffer = byte_stream_buffer;
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RESOURCE *output_struct = (RESOURCE *) * output_buffer;
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u8 temp8 = 0;
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u8 index;
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u8 i;
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u32 struct_size = sizeof(DMA_RESOURCE) +
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RESOURCE_LENGTH_NO_DATA;
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/*
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* The number of bytes consumed are Constant
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*/
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*bytes_consumed = 3;
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output_struct->id = dma;
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/*
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* Point to the 8-bits of Byte 1
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*/
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buffer += 1;
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temp8 = *buffer;
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/* Decode the IRQ bits */
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for (i = 0, index = 0; index < 8; index++) {
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if ((temp8 >> index) & 0x01) {
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output_struct->data.dma.channels[i] = index;
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i++;
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}
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}
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output_struct->data.dma.number_of_channels = i;
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/*
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* Calculate the structure size based upon the number of interrupts
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*/
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struct_size += (output_struct->data.dma.number_of_channels - 1) * 4;
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/*
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* Point to Byte 2
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*/
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buffer += 1;
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temp8 = *buffer;
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/*
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* Check for transfer preference (Bits[1:0])
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*/
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output_struct->data.dma.transfer = temp8 & 0x03;
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if (0x03 == output_struct->data.dma.transfer) {
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return (AE_BAD_DATA);
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}
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/*
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* Get bus master preference (Bit[2])
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*/
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output_struct->data.dma.bus_master = (temp8 >> 2) & 0x01;
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/*
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* Get channel speed support (Bits[6:5])
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*/
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output_struct->data.dma.type = (temp8 >> 5) & 0x03;
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/*
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* Set the Length parameter
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*/
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output_struct->length = struct_size;
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/*
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* Return the final size of the structure
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*/
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*structure_size = struct_size;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: Acpi_rs_dma_stream
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*
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* PARAMETERS: Linked_list - Pointer to the resource linked list
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* Output_buffer - Pointer to the user's return buffer
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* Bytes_consumed - u32 pointer that is filled with
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* the number of bytes of the
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* Output_buffer used
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*
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* RETURN: Status AE_OK if okay, else a valid ACPI_STATUS code
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*
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* DESCRIPTION: Take the linked list resource structure and fills in the
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* the appropriate bytes in a byte stream
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_rs_dma_stream (
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RESOURCE *linked_list,
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u8 **output_buffer,
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u32 *bytes_consumed)
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{
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u8 *buffer = *output_buffer;
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u16 temp16 = 0;
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u8 temp8 = 0;
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u8 index;
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/*
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* The descriptor field is static
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*/
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*buffer = 0x2A;
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buffer += 1;
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temp8 = 0;
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/*
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* Loop through all of the Channels and set the mask bits
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*/
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for (index = 0;
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index < linked_list->data.dma.number_of_channels;
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index++) {
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temp16 = (u16) linked_list->data.dma.channels[index];
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temp8 |= 0x1 << temp16;
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}
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*buffer = temp8;
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buffer += 1;
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/*
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* Set the DMA Info
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*/
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temp8 = (u8) ((linked_list->data.dma.type & 0x03) << 5);
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temp8 |= ((linked_list->data.dma.bus_master & 0x01) << 2);
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temp8 |= (linked_list->data.dma.transfer & 0x03);
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*buffer = temp8;
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buffer += 1;
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/*
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* Return the number of bytes consumed in this operation
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*/
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*bytes_consumed = (u32) ((NATIVE_UINT) buffer -
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(NATIVE_UINT) *output_buffer);
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return (AE_OK);
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}
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