/*******************************************************************************
*
* Module Name: rsio - IO and DMA resource descriptors
* $Revision: 17 $
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2002, 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 "acresrc.h"
#define _COMPONENT ACPI_RESOURCES
ACPI_MODULE_NAME ("rsio")
/*******************************************************************************
*
* FUNCTION: Acpi_rs_io_resource
*
* PARAMETERS: Byte_stream_buffer - Pointer to the resource input byte
* stream
* Bytes_consumed - Pointer to where the number of bytes
* consumed the Byte_stream_buffer is
* returned
* Output_buffer - Pointer to the return data buffer
* Structure_size - Pointer to where the number of bytes
* in the return data struct is returned
*
* RETURN: Status
*
* DESCRIPTION: Take the resource byte stream and fill out the appropriate
* structure pointed to by the Output_buffer. Return the
* number of bytes consumed from the byte stream.
*
******************************************************************************/
acpi_status
acpi_rs_io_resource (
u8 *byte_stream_buffer,
ACPI_SIZE *bytes_consumed,
u8 **output_buffer,
ACPI_SIZE *structure_size)
{
u8 *buffer = byte_stream_buffer;
acpi_resource *output_struct = (acpi_resource *) *output_buffer;
u16 temp16 = 0;
u8 temp8 = 0;
ACPI_SIZE struct_size = ACPI_SIZEOF_RESOURCE (acpi_resource_io);
ACPI_FUNCTION_TRACE ("Rs_io_resource");
/*
* The number of bytes consumed are Constant
*/
*bytes_consumed = 8;
output_struct->id = ACPI_RSTYPE_IO;
/*
* Check Decode
*/
buffer += 1;
temp8 = *buffer;
output_struct->data.io.io_decode = temp8 & 0x01;
/*
* Check Min_base Address
*/
buffer += 1;
ACPI_MOVE_UNALIGNED16_TO_16 (&temp16, buffer);
output_struct->data.io.min_base_address = temp16;
/*
* Check Max_base Address
*/
buffer += 2;
ACPI_MOVE_UNALIGNED16_TO_16 (&temp16, buffer);
output_struct->data.io.max_base_address = temp16;
/*
* Check Base alignment
*/
buffer += 2;
temp8 = *buffer;
output_struct->data.io.alignment = temp8;
/*
* Check Range_length
*/
buffer += 1;
temp8 = *buffer;
output_struct->data.io.range_length = temp8;
/*
* Set the Length parameter
*/
output_struct->length = struct_size;
/*
* Return the final size of the structure
*/
*structure_size = struct_size;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_rs_fixed_io_resource
*
* PARAMETERS: Byte_stream_buffer - Pointer to the resource input byte
* stream
* Bytes_consumed - Pointer to where the number of bytes
* consumed the Byte_stream_buffer is
* returned
* Output_buffer - Pointer to the return data buffer
* Structure_size - Pointer to where the number of bytes
* in the return data struct is returned
*
* RETURN: Status
*
* DESCRIPTION: Take the resource byte stream and fill out the appropriate
* structure pointed to by the Output_buffer. Return the
* number of bytes consumed from the byte stream.
*
******************************************************************************/
acpi_status
acpi_rs_fixed_io_resource (
u8 *byte_stream_buffer,
ACPI_SIZE *bytes_consumed,
u8 **output_buffer,
ACPI_SIZE *structure_size)
{
u8 *buffer = byte_stream_buffer;
acpi_resource *output_struct = (acpi_resource *) *output_buffer;
u16 temp16 = 0;
u8 temp8 = 0;
ACPI_SIZE struct_size = ACPI_SIZEOF_RESOURCE (acpi_resource_fixed_io);
ACPI_FUNCTION_TRACE ("Rs_fixed_io_resource");
/*
* The number of bytes consumed are Constant
*/
*bytes_consumed = 4;
output_struct->id = ACPI_RSTYPE_FIXED_IO;
/*
* Check Range Base Address
*/
buffer += 1;
ACPI_MOVE_UNALIGNED16_TO_16 (&temp16, buffer);
output_struct->data.fixed_io.base_address = temp16;
/*
* Check Range_length
*/
buffer += 2;
temp8 = *buffer;
output_struct->data.fixed_io.range_length = temp8;
/*
* Set the Length parameter
*/
output_struct->length = struct_size;
/*
* Return the final size of the structure
*/
*structure_size = struct_size;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_rs_io_stream
*
* PARAMETERS: Linked_list - Pointer to the resource linked list
* Output_buffer - Pointer to the user's return buffer
* Bytes_consumed - Pointer to where the number of bytes
* used in the Output_buffer is returned
*
* RETURN: Status
*
* DESCRIPTION: Take the linked list resource structure and fills in the
* the appropriate bytes in a byte stream
*
******************************************************************************/
acpi_status
acpi_rs_io_stream (
acpi_resource *linked_list,
u8 **output_buffer,
ACPI_SIZE *bytes_consumed)
{
u8 *buffer = *output_buffer;
u16 temp16 = 0;
u8 temp8 = 0;
ACPI_FUNCTION_TRACE ("Rs_io_stream");
/*
* The descriptor field is static
*/
*buffer = 0x47;
buffer += 1;
/*
* Io Information Byte
*/
temp8 = (u8) (linked_list->data.io.io_decode & 0x01);
*buffer = temp8;
buffer += 1;
/*
* Set the Range minimum base address
*/
temp16 = (u16) linked_list->data.io.min_base_address;
ACPI_MOVE_UNALIGNED16_TO_16 (buffer, &temp16);
buffer += 2;
/*
* Set the Range maximum base address
*/
temp16 = (u16) linked_list->data.io.max_base_address;
ACPI_MOVE_UNALIGNED16_TO_16 (buffer, &temp16);
buffer += 2;
/*
* Set the base alignment
*/
temp8 = (u8) linked_list->data.io.alignment;
*buffer = temp8;
buffer += 1;
/*
* Set the range length
*/
temp8 = (u8) linked_list->data.io.range_length;
*buffer = temp8;
buffer += 1;
/*
* Return the number of bytes consumed in this operation
*/
*bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_rs_fixed_io_stream
*
* PARAMETERS: Linked_list - Pointer to the resource linked list
* Output_buffer - Pointer to the user's return buffer
* Bytes_consumed - Pointer to where the number of bytes
* used in the Output_buffer is returned
*
* RETURN: Status
*
* DESCRIPTION: Take the linked list resource structure and fills in the
* the appropriate bytes in a byte stream
*
******************************************************************************/
acpi_status
acpi_rs_fixed_io_stream (
acpi_resource *linked_list,
u8 **output_buffer,
ACPI_SIZE *bytes_consumed)
{
u8 *buffer = *output_buffer;
u16 temp16 = 0;
u8 temp8 = 0;
ACPI_FUNCTION_TRACE ("Rs_fixed_io_stream");
/*
* The descriptor field is static
*/
*buffer = 0x4B;
buffer += 1;
/*
* Set the Range base address
*/
temp16 = (u16) linked_list->data.fixed_io.base_address;
ACPI_MOVE_UNALIGNED16_TO_16 (buffer, &temp16);
buffer += 2;
/*
* Set the range length
*/
temp8 = (u8) linked_list->data.fixed_io.range_length;
*buffer = temp8;
buffer += 1;
/*
* Return the number of bytes consumed in this operation
*/
*bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_rs_dma_resource
*
* PARAMETERS: Byte_stream_buffer - Pointer to the resource input byte
* stream
* Bytes_consumed - Pointer to where the number of bytes
* consumed the Byte_stream_buffer is
* returned
* Output_buffer - Pointer to the return data buffer
* Structure_size - Pointer to where the number of bytes
* in the return data struct is returned
*
* RETURN: Status
*
* DESCRIPTION: Take the resource byte stream and fill out the appropriate
* structure pointed to by the Output_buffer. Return the
* number of bytes consumed from the byte stream.
*
******************************************************************************/
acpi_status
acpi_rs_dma_resource (
u8 *byte_stream_buffer,
ACPI_SIZE *bytes_consumed,
u8 **output_buffer,
ACPI_SIZE *structure_size)
{
u8 *buffer = byte_stream_buffer;
acpi_resource *output_struct = (acpi_resource *) *output_buffer;
u8 temp8 = 0;
u8 index;
u8 i;
ACPI_SIZE struct_size = ACPI_SIZEOF_RESOURCE (acpi_resource_dma);
ACPI_FUNCTION_TRACE ("Rs_dma_resource");
/*
* The number of bytes consumed are Constant
*/
*bytes_consumed = 3;
output_struct->id = ACPI_RSTYPE_DMA;
/*
* Point to the 8-bits of Byte 1
*/
buffer += 1;
temp8 = *buffer;
/* Decode the IRQ bits */
for (i = 0, index = 0; index < 8; index++) {
if ((temp8 >> index) & 0x01) {
output_struct->data.dma.channels[i] = index;
i++;
}
}
output_struct->data.dma.number_of_channels = i;
/*
* Calculate the structure size based upon the number of interrupts
*/
struct_size += (output_struct->data.dma.number_of_channels - 1) * 4;
/*
* Point to Byte 2
*/
buffer += 1;
temp8 = *buffer;
/*
* Check for transfer preference (Bits[1:0])
*/
output_struct->data.dma.transfer = temp8 & 0x03;
if (0x03 == output_struct->data.dma.transfer) {
return_ACPI_STATUS (AE_BAD_DATA);
}
/*
* Get bus master preference (Bit[2])
*/
output_struct->data.dma.bus_master = (temp8 >> 2) & 0x01;
/*
* Get channel speed support (Bits[6:5])
*/
output_struct->data.dma.type = (temp8 >> 5) & 0x03;
/*
* Set the Length parameter
*/
output_struct->length = struct_size;
/*
* Return the final size of the structure
*/
*structure_size = struct_size;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_rs_dma_stream
*
* PARAMETERS: Linked_list - Pointer to the resource linked list
* Output_buffer - Pointer to the user's return buffer
* Bytes_consumed - Pointer to where the number of bytes
* used in the Output_buffer is returned
*
* RETURN: Status
*
* DESCRIPTION: Take the linked list resource structure and fills in the
* the appropriate bytes in a byte stream
*
******************************************************************************/
acpi_status
acpi_rs_dma_stream (
acpi_resource *linked_list,
u8 **output_buffer,
ACPI_SIZE *bytes_consumed)
{
u8 *buffer = *output_buffer;
u16 temp16 = 0;
u8 temp8 = 0;
u8 index;
ACPI_FUNCTION_TRACE ("Rs_dma_stream");
/*
* The descriptor field is static
*/
*buffer = 0x2A;
buffer += 1;
temp8 = 0;
/*
* Loop through all of the Channels and set the mask bits
*/
for (index = 0;
index < linked_list->data.dma.number_of_channels;
index++) {
temp16 = (u16) linked_list->data.dma.channels[index];
temp8 |= 0x1 << temp16;
}
*buffer = temp8;
buffer += 1;
/*
* Set the DMA Info
*/
temp8 = (u8) ((linked_list->data.dma.type & 0x03) << 5);
temp8 |= ((linked_list->data.dma.bus_master & 0x01) << 2);
temp8 |= (linked_list->data.dma.transfer & 0x03);
*buffer = temp8;
buffer += 1;
/*
* Return the number of bytes consumed in this operation
*/
*bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer);
return_ACPI_STATUS (AE_OK);
}