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path: root/drivers/acpi/resources/rsio.c
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Diffstat (limited to 'drivers/acpi/resources/rsio.c')
-rw-r--r--drivers/acpi/resources/rsio.c545
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diff --git a/drivers/acpi/resources/rsio.c b/drivers/acpi/resources/rsio.c
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+++ b/drivers/acpi/resources/rsio.c
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+/*******************************************************************************
+ *
+ * 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);
+}
+
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