[mirror_ubuntu-artful-kernel.git] / drivers / acpi / resources / rsio.c

/*******************************************************************************
 *
 * 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->type = 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->type = 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:  Resource                - 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 *resource,
		  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 Type field is static */

	*buffer = ACPI_RDESC_TYPE_IO_PORT | 0x07;
	buffer += 1;

	/* Io Information Byte */

	temp8 = (u8) (resource->data.io.io_decode & 0x01);

	*buffer = temp8;
	buffer += 1;

	/* Set the Range minimum base address */

	temp16 = (u16) resource->data.io.min_base_address;

	ACPI_MOVE_16_TO_16(buffer, &temp16);
	buffer += 2;

	/* Set the Range maximum base address */

	temp16 = (u16) resource->data.io.max_base_address;

	ACPI_MOVE_16_TO_16(buffer, &temp16);
	buffer += 2;

	/* Set the base alignment */

	temp8 = (u8) resource->data.io.alignment;

	*buffer = temp8;
	buffer += 1;

	/* Set the range length */

	temp8 = (u8) resource->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:  Resource                - 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 *resource,
			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 Type field is static */

	*buffer = ACPI_RDESC_TYPE_FIXED_IO_PORT | 0x03;
	buffer += 1;

	/* Set the Range base address */

	temp16 = (u16) resource->data.fixed_io.base_address;

	ACPI_MOVE_16_TO_16(buffer, &temp16);
	buffer += 2;

	/* Set the range length */

	temp8 = (u8) resource->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->type = 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:  Resource                - 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 *resource,
		   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 Type field is static */

	*buffer = ACPI_RDESC_TYPE_DMA_FORMAT | 0x02;
	buffer += 1;
	temp8 = 0;

	/* Loop through all of the Channels and set the mask bits */

	for (index = 0; index < resource->data.dma.number_of_channels; index++) {
		temp16 = (u16) resource->data.dma.channels[index];
		temp8 |= 0x1 << temp16;
	}

	*buffer = temp8;
	buffer += 1;

	/* Set the DMA Info */

	temp8 = (u8) ((resource->data.dma.type & 0x03) << 5);
	temp8 |= ((resource->data.dma.bus_master & 0x01) << 2);
	temp8 |= (resource->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);
}
Commit	Line	Data
1da177e4 LT	1	/*******************************************************************************
	2	*
	3	* Module Name: rsio - IO and DMA resource descriptors
	4	*
	5	******************************************************************************/
	6
	7	/*
	8	* Copyright (C) 2000 - 2005, R. Byron Moore
	9	* All rights reserved.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions, and the following disclaimer,
	16	* without modification.
	17	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	18	* substantially similar to the "NO WARRANTY" disclaimer below
	19	* ("Disclaimer") and any redistribution must be conditioned upon
	20	* including a substantially similar Disclaimer requirement for further
	21	* binary redistribution.
	22	* 3. Neither the names of the above-listed copyright holders nor the names
	23	* of any contributors may be used to endorse or promote products derived
	24	* from this software without specific prior written permission.
	25	*
	26	* Alternatively, this software may be distributed under the terms of the
	27	* GNU General Public License ("GPL") version 2 as published by the Free
	28	* Software Foundation.
	29	*
	30	* NO WARRANTY
	31	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	32	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	33	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	34	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	35	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	36	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	37	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	38	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	39	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	40	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	41	* POSSIBILITY OF SUCH DAMAGES.
	42	*/
	43
1da177e4 LT	44	#include <acpi/acpi.h>
	45	#include <acpi/acresrc.h>
	46
	47	#define _COMPONENT ACPI_RESOURCES
4be44fcd	48	ACPI_MODULE_NAME("rsio")
1da177e4 LT	49
	50	/*******************************************************************************
	51	*
	52	* FUNCTION: acpi_rs_io_resource
	53	*
	54	* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
	55	* stream
	56	* bytes_consumed - Pointer to where the number of bytes
	57	* consumed the byte_stream_buffer is
	58	* returned
	59	* output_buffer - Pointer to the return data buffer
	60	* structure_size - Pointer to where the number of bytes
	61	* in the return data struct is returned
	62	*
	63	* RETURN: Status
	64	*
	65	* DESCRIPTION: Take the resource byte stream and fill out the appropriate
	66	* structure pointed to by the output_buffer. Return the
	67	* number of bytes consumed from the byte stream.
	68	*
	69	******************************************************************************/
1da177e4	70	acpi_status
4be44fcd LB	71	acpi_rs_io_resource(u8 * byte_stream_buffer,
	72	acpi_size * bytes_consumed,
	73	u8 ** output_buffer, acpi_size * structure_size)
1da177e4	74	{
4be44fcd LB	75	u8 *buffer = byte_stream_buffer;
	76	struct acpi_resource output_struct = (void )*output_buffer;
	77	u16 temp16 = 0;
	78	u8 temp8 = 0;
	79	acpi_size struct_size = ACPI_SIZEOF_RESOURCE(struct acpi_resource_io);
1da177e4	80
4be44fcd	81	ACPI_FUNCTION_TRACE("rs_io_resource");
1da177e4	82
44f6c012 RM	83	/* The number of bytes consumed are Constant */
44f6c012 RM	84
1da177e4 LT	85	*bytes_consumed = 8;
1da177e4 LT	86
bda663d3	87	output_struct->type = ACPI_RSTYPE_IO;
1da177e4	88
44f6c012 RM	89	/* Check Decode */
44f6c012 RM	90
1da177e4 LT	91	buffer += 1;
	92	temp8 = *buffer;
	93
	94	output_struct->data.io.io_decode = temp8 & 0x01;
	95
44f6c012 RM	96	/* Check min_base Address */
44f6c012 RM	97
1da177e4	98	buffer += 1;
4be44fcd	99	ACPI_MOVE_16_TO_16(&temp16, buffer);
1da177e4 LT	100
	101	output_struct->data.io.min_base_address = temp16;
	102
44f6c012 RM	103	/* Check max_base Address */
44f6c012 RM	104
1da177e4	105	buffer += 2;
4be44fcd	106	ACPI_MOVE_16_TO_16(&temp16, buffer);
1da177e4 LT	107
	108	output_struct->data.io.max_base_address = temp16;
	109
44f6c012 RM	110	/* Check Base alignment */
44f6c012 RM	111
1da177e4 LT	112	buffer += 2;
	113	temp8 = *buffer;
	114
	115	output_struct->data.io.alignment = temp8;
	116
44f6c012 RM	117	/* Check range_length */
44f6c012 RM	118
1da177e4 LT	119	buffer += 1;
	120	temp8 = *buffer;
	121
	122	output_struct->data.io.range_length = temp8;
	123
44f6c012 RM	124	/* Set the Length parameter */
44f6c012 RM	125
1da177e4 LT	126	output_struct->length = (u32) struct_size;
1da177e4 LT	127
44f6c012 RM	128	/* Return the final size of the structure */
44f6c012 RM	129
1da177e4	130	*structure_size = struct_size;
4be44fcd	131	return_ACPI_STATUS(AE_OK);
1da177e4 LT	132	}
1da177e4 LT	133
1da177e4 LT	134	/*******************************************************************************
	135	*
	136	* FUNCTION: acpi_rs_fixed_io_resource
	137	*
	138	* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
	139	* stream
	140	* bytes_consumed - Pointer to where the number of bytes
	141	* consumed the byte_stream_buffer is
	142	* returned
	143	* output_buffer - Pointer to the return data buffer
	144	* structure_size - Pointer to where the number of bytes
	145	* in the return data struct is returned
	146	*
	147	* RETURN: Status
	148	*
	149	* DESCRIPTION: Take the resource byte stream and fill out the appropriate
	150	* structure pointed to by the output_buffer. Return the
	151	* number of bytes consumed from the byte stream.
	152	*
	153	******************************************************************************/
	154
	155	acpi_status
4be44fcd LB	156	acpi_rs_fixed_io_resource(u8 * byte_stream_buffer,
	157	acpi_size * bytes_consumed,
	158	u8 ** output_buffer, acpi_size * structure_size)
1da177e4	159	{
4be44fcd LB	160	u8 *buffer = byte_stream_buffer;
	161	struct acpi_resource output_struct = (void )*output_buffer;
	162	u16 temp16 = 0;
	163	u8 temp8 = 0;
	164	acpi_size struct_size =
	165	ACPI_SIZEOF_RESOURCE(struct acpi_resource_fixed_io);
1da177e4	166
4be44fcd	167	ACPI_FUNCTION_TRACE("rs_fixed_io_resource");
1da177e4	168
44f6c012 RM	169	/* The number of bytes consumed are Constant */
44f6c012 RM	170
1da177e4 LT	171	*bytes_consumed = 4;
1da177e4 LT	172
bda663d3	173	output_struct->type = ACPI_RSTYPE_FIXED_IO;
1da177e4	174
44f6c012 RM	175	/* Check Range Base Address */
44f6c012 RM	176
1da177e4	177	buffer += 1;
4be44fcd	178	ACPI_MOVE_16_TO_16(&temp16, buffer);
1da177e4 LT	179
	180	output_struct->data.fixed_io.base_address = temp16;
	181
44f6c012 RM	182	/* Check range_length */
44f6c012 RM	183
1da177e4 LT	184	buffer += 2;
	185	temp8 = *buffer;
	186
	187	output_struct->data.fixed_io.range_length = temp8;
	188
44f6c012 RM	189	/* Set the Length parameter */
44f6c012 RM	190
1da177e4 LT	191	output_struct->length = (u32) struct_size;
1da177e4 LT	192
44f6c012 RM	193	/* Return the final size of the structure */
44f6c012 RM	194
1da177e4	195	*structure_size = struct_size;
4be44fcd	196	return_ACPI_STATUS(AE_OK);
1da177e4 LT	197	}
1da177e4 LT	198
1da177e4 LT	199	/*******************************************************************************
	200	*
	201	* FUNCTION: acpi_rs_io_stream
	202	*
bda663d3	203	* PARAMETERS: Resource - Pointer to the resource linked list
1da177e4 LT	204	* output_buffer - Pointer to the user's return buffer
	205	* bytes_consumed - Pointer to where the number of bytes
	206	* used in the output_buffer is returned
	207	*
	208	* RETURN: Status
	209	*
	210	* DESCRIPTION: Take the linked list resource structure and fills in the
	211	* the appropriate bytes in a byte stream
	212	*
	213	******************************************************************************/
	214
	215	acpi_status
bda663d3	216	acpi_rs_io_stream(struct acpi_resource *resource,
4be44fcd	217	u8 ** output_buffer, acpi_size * bytes_consumed)
1da177e4	218	{
4be44fcd LB	219	u8 buffer = output_buffer;
	220	u16 temp16 = 0;
	221	u8 temp8 = 0;
1da177e4	222
4be44fcd	223	ACPI_FUNCTION_TRACE("rs_io_stream");
1da177e4	224
bda663d3	225	/* The Descriptor Type field is static */
44f6c012	226
bda663d3	227	*buffer = ACPI_RDESC_TYPE_IO_PORT \| 0x07;
1da177e4 LT	228	buffer += 1;
1da177e4 LT	229
44f6c012 RM	230	/* Io Information Byte */
44f6c012 RM	231
bda663d3	232	temp8 = (u8) (resource->data.io.io_decode & 0x01);
1da177e4 LT	233
	234	*buffer = temp8;
	235	buffer += 1;
	236
44f6c012 RM	237	/* Set the Range minimum base address */
44f6c012 RM	238
bda663d3	239	temp16 = (u16) resource->data.io.min_base_address;
1da177e4	240
4be44fcd	241	ACPI_MOVE_16_TO_16(buffer, &temp16);
1da177e4 LT	242	buffer += 2;
1da177e4 LT	243
44f6c012 RM	244	/* Set the Range maximum base address */
44f6c012 RM	245
bda663d3	246	temp16 = (u16) resource->data.io.max_base_address;
1da177e4	247
4be44fcd	248	ACPI_MOVE_16_TO_16(buffer, &temp16);
1da177e4 LT	249	buffer += 2;
1da177e4 LT	250
44f6c012 RM	251	/* Set the base alignment */
44f6c012 RM	252
bda663d3	253	temp8 = (u8) resource->data.io.alignment;
1da177e4 LT	254
	255	*buffer = temp8;
	256	buffer += 1;
	257
44f6c012 RM	258	/* Set the range length */
44f6c012 RM	259
bda663d3	260	temp8 = (u8) resource->data.io.range_length;
1da177e4 LT	261
	262	*buffer = temp8;
	263	buffer += 1;
	264
44f6c012 RM	265	/* Return the number of bytes consumed in this operation */
44f6c012 RM	266
4be44fcd LB	267	bytes_consumed = ACPI_PTR_DIFF(buffer, output_buffer);
4be44fcd LB	268	return_ACPI_STATUS(AE_OK);
1da177e4 LT	269	}
1da177e4 LT	270
1da177e4 LT	271	/*******************************************************************************
	272	*
	273	* FUNCTION: acpi_rs_fixed_io_stream
	274	*
bda663d3	275	* PARAMETERS: Resource - Pointer to the resource linked list
1da177e4 LT	276	* output_buffer - Pointer to the user's return buffer
	277	* bytes_consumed - Pointer to where the number of bytes
	278	* used in the output_buffer is returned
	279	*
	280	* RETURN: Status
	281	*
	282	* DESCRIPTION: Take the linked list resource structure and fills in the
	283	* the appropriate bytes in a byte stream
	284	*
	285	******************************************************************************/
	286
	287	acpi_status
bda663d3	288	acpi_rs_fixed_io_stream(struct acpi_resource *resource,
4be44fcd	289	u8 ** output_buffer, acpi_size * bytes_consumed)
1da177e4	290	{
4be44fcd LB	291	u8 buffer = output_buffer;
	292	u16 temp16 = 0;
	293	u8 temp8 = 0;
1da177e4	294
4be44fcd	295	ACPI_FUNCTION_TRACE("rs_fixed_io_stream");
1da177e4	296
bda663d3	297	/* The Descriptor Type field is static */
1da177e4	298
bda663d3	299	*buffer = ACPI_RDESC_TYPE_FIXED_IO_PORT \| 0x03;
1da177e4 LT	300	buffer += 1;
1da177e4 LT	301
44f6c012 RM	302	/* Set the Range base address */
44f6c012 RM	303
bda663d3	304	temp16 = (u16) resource->data.fixed_io.base_address;
1da177e4	305
4be44fcd	306	ACPI_MOVE_16_TO_16(buffer, &temp16);
1da177e4 LT	307	buffer += 2;
1da177e4 LT	308
44f6c012 RM	309	/* Set the range length */
44f6c012 RM	310
bda663d3	311	temp8 = (u8) resource->data.fixed_io.range_length;
1da177e4 LT	312
	313	*buffer = temp8;
	314	buffer += 1;
	315
44f6c012 RM	316	/* Return the number of bytes consumed in this operation */
44f6c012 RM	317
4be44fcd LB	318	bytes_consumed = ACPI_PTR_DIFF(buffer, output_buffer);
4be44fcd LB	319	return_ACPI_STATUS(AE_OK);
1da177e4 LT	320	}
1da177e4 LT	321
1da177e4 LT	322	/*******************************************************************************
	323	*
	324	* FUNCTION: acpi_rs_dma_resource
	325	*
	326	* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
	327	* stream
	328	* bytes_consumed - Pointer to where the number of bytes
	329	* consumed the byte_stream_buffer is
	330	* returned
	331	* output_buffer - Pointer to the return data buffer
	332	* structure_size - Pointer to where the number of bytes
	333	* in the return data struct is returned
	334	*
	335	* RETURN: Status
	336	*
	337	* DESCRIPTION: Take the resource byte stream and fill out the appropriate
	338	* structure pointed to by the output_buffer. Return the
	339	* number of bytes consumed from the byte stream.
	340	*
	341	******************************************************************************/
	342
	343	acpi_status
4be44fcd LB	344	acpi_rs_dma_resource(u8 * byte_stream_buffer,
	345	acpi_size * bytes_consumed,
	346	u8 ** output_buffer, acpi_size * structure_size)
1da177e4	347	{
4be44fcd LB	348	u8 *buffer = byte_stream_buffer;
	349	struct acpi_resource output_struct = (void )*output_buffer;
	350	u8 temp8 = 0;
	351	u8 index;
	352	u8 i;
	353	acpi_size struct_size = ACPI_SIZEOF_RESOURCE(struct acpi_resource_dma);
1da177e4	354
4be44fcd	355	ACPI_FUNCTION_TRACE("rs_dma_resource");
1da177e4	356
44f6c012 RM	357	/* The number of bytes consumed are Constant */
44f6c012 RM	358
1da177e4	359	*bytes_consumed = 3;
bda663d3	360	output_struct->type = ACPI_RSTYPE_DMA;
1da177e4	361
44f6c012 RM	362	/* Point to the 8-bits of Byte 1 */
44f6c012 RM	363
1da177e4 LT	364	buffer += 1;
	365	temp8 = *buffer;
	366
	367	/* Decode the DMA channel bits */
	368
	369	for (i = 0, index = 0; index < 8; index++) {
	370	if ((temp8 >> index) & 0x01) {
	371	output_struct->data.dma.channels[i] = index;
	372	i++;
	373	}
	374	}
	375
	376	/* Zero DMA channels is valid */
	377
	378	output_struct->data.dma.number_of_channels = i;
	379	if (i > 0) {
44f6c012 RM	380	/* Calculate the structure size based upon the number of interrupts */
44f6c012 RM	381
1da177e4 LT	382	struct_size += ((acpi_size) i - 1) * 4;
	383	}
	384
44f6c012 RM	385	/* Point to Byte 2 */
44f6c012 RM	386
1da177e4 LT	387	buffer += 1;
	388	temp8 = *buffer;
	389
44f6c012 RM	390	/* Check for transfer preference (Bits[1:0]) */
44f6c012 RM	391
1da177e4 LT	392	output_struct->data.dma.transfer = temp8 & 0x03;
	393
	394	if (0x03 == output_struct->data.dma.transfer) {
4be44fcd LB	395	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	396	"Invalid DMA.Transfer preference (3)\n"));
	397	return_ACPI_STATUS(AE_BAD_DATA);
1da177e4 LT	398	}
1da177e4 LT	399
44f6c012 RM	400	/* Get bus master preference (Bit[2]) */
44f6c012 RM	401
1da177e4 LT	402	output_struct->data.dma.bus_master = (temp8 >> 2) & 0x01;
1da177e4 LT	403
44f6c012 RM	404	/* Get channel speed support (Bits[6:5]) */
44f6c012 RM	405
1da177e4 LT	406	output_struct->data.dma.type = (temp8 >> 5) & 0x03;
1da177e4 LT	407
44f6c012 RM	408	/* Set the Length parameter */
44f6c012 RM	409
1da177e4 LT	410	output_struct->length = (u32) struct_size;
1da177e4 LT	411
44f6c012 RM	412	/* Return the final size of the structure */
44f6c012 RM	413
1da177e4	414	*structure_size = struct_size;
4be44fcd	415	return_ACPI_STATUS(AE_OK);
1da177e4 LT	416	}
1da177e4 LT	417
1da177e4 LT	418	/*******************************************************************************
	419	*
	420	* FUNCTION: acpi_rs_dma_stream
	421	*
bda663d3	422	* PARAMETERS: Resource - Pointer to the resource linked list
1da177e4 LT	423	* output_buffer - Pointer to the user's return buffer
	424	* bytes_consumed - Pointer to where the number of bytes
	425	* used in the output_buffer is returned
	426	*
	427	* RETURN: Status
	428	*
	429	* DESCRIPTION: Take the linked list resource structure and fills in the
	430	* the appropriate bytes in a byte stream
	431	*
	432	******************************************************************************/
	433
	434	acpi_status
bda663d3	435	acpi_rs_dma_stream(struct acpi_resource *resource,
4be44fcd	436	u8 ** output_buffer, acpi_size * bytes_consumed)
1da177e4	437	{
4be44fcd LB	438	u8 buffer = output_buffer;
	439	u16 temp16 = 0;
	440	u8 temp8 = 0;
	441	u8 index;
1da177e4	442
4be44fcd	443	ACPI_FUNCTION_TRACE("rs_dma_stream");
1da177e4	444
bda663d3	445	/* The Descriptor Type field is static */
44f6c012	446
bda663d3	447	*buffer = ACPI_RDESC_TYPE_DMA_FORMAT \| 0x02;
1da177e4 LT	448	buffer += 1;
	449	temp8 = 0;
	450
44f6c012 RM	451	/* Loop through all of the Channels and set the mask bits */
44f6c012 RM	452
bda663d3 RM	453	for (index = 0; index < resource->data.dma.number_of_channels; index++) {
bda663d3 RM	454	temp16 = (u16) resource->data.dma.channels[index];
1da177e4 LT	455	temp8 \|= 0x1 << temp16;
	456	}
	457
	458	*buffer = temp8;
	459	buffer += 1;
	460
44f6c012 RM	461	/* Set the DMA Info */
44f6c012 RM	462
bda663d3 RM	463	temp8 = (u8) ((resource->data.dma.type & 0x03) << 5);
	464	temp8 \|= ((resource->data.dma.bus_master & 0x01) << 2);
	465	temp8 \|= (resource->data.dma.transfer & 0x03);
1da177e4 LT	466
	467	*buffer = temp8;
	468	buffer += 1;
	469
44f6c012 RM	470	/* Return the number of bytes consumed in this operation */
44f6c012 RM	471
4be44fcd LB	472	bytes_consumed = ACPI_PTR_DIFF(buffer, output_buffer);
4be44fcd LB	473	return_ACPI_STATUS(AE_OK);
1da177e4	474	}