/*******************************************************************************
*
* Module Name: rsio - IO and DMA resource descriptors
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2005, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include <acpi/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;
struct acpi_resource *output_struct = (void *)*output_buffer;
u16 temp16 = 0;
u8 temp8 = 0;
acpi_size struct_size = ACPI_SIZEOF_RESOURCE(struct 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_16_TO_16(&temp16, buffer);
output_struct->data.io.min_base_address = temp16;
/* Check max_base Address */
buffer += 2;
ACPI_MOVE_16_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 = (u32) 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;
struct acpi_resource *output_struct = (void *)*output_buffer;
u16 temp16 = 0;
u8 temp8 = 0;
acpi_size struct_size =
ACPI_SIZEOF_RESOURCE(struct 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_16_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 = (u32) 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(struct 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_16_TO_16(buffer, &temp16);
buffer += 2;
/* Set the Range maximum base address */
temp16 = (u16) linked_list->data.io.max_base_address;
ACPI_MOVE_16_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(struct 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_16_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;
struct acpi_resource *output_struct = (void *)*output_buffer;
u8 temp8 = 0;
u8 index;
u8 i;
acpi_size struct_size = ACPI_SIZEOF_RESOURCE(struct 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 DMA channel bits */
for (i = 0, index = 0; index < 8; index++) {
if ((temp8 >> index) & 0x01) {
output_struct->data.dma.channels[i] = index;
i++;
}
}
/* Zero DMA channels is valid */
output_struct->data.dma.number_of_channels = i;
if (i > 0) {
/* Calculate the structure size based upon the number of interrupts */
struct_size += ((acpi_size) i - 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) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Invalid DMA.Transfer preference (3)\n"));
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 = (u32) 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(struct 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);
}
