318 lines
10 KiB
C
318 lines
10 KiB
C
/*******************************************************************************
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*
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* Module Name: rsio - IO and DMA resource descriptors
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acresrc.h>
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#define _COMPONENT ACPI_RESOURCES
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ACPI_MODULE_NAME("rsio")
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_get_io
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*
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* PARAMETERS: Aml - Pointer to the AML resource descriptor
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* aml_resource_length - Length of the resource from the AML header
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* Resource - Where the internal resource is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert a raw AML resource descriptor to the corresponding
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* internal resource descriptor, simplifying bitflags and handling
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* alignment and endian issues if necessary.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_get_io(union aml_resource *aml,
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u16 aml_resource_length, struct acpi_resource *resource)
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{
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ACPI_FUNCTION_TRACE("rs_get_io");
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/* Get the Decode flag */
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resource->data.io.io_decode = aml->io.information & 0x01;
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/*
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* Get the following contiguous fields from the AML descriptor:
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* Minimum Base Address
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* Maximum Base Address
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* Address Alignment
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* Length
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*/
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ACPI_MOVE_16_TO_32(&resource->data.io.minimum, &aml->io.minimum);
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ACPI_MOVE_16_TO_32(&resource->data.io.maximum, &aml->io.maximum);
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resource->data.io.alignment = aml->io.alignment;
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resource->data.io.address_length = aml->io.address_length;
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/* Complete the resource header */
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resource->type = ACPI_RESOURCE_TYPE_IO;
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resource->length = ACPI_SIZEOF_RESOURCE(struct acpi_resource_io);
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_set_io
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*
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* PARAMETERS: Resource - Pointer to the resource descriptor
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* Aml - Where the AML descriptor is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert an internal resource descriptor to the corresponding
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* external AML resource descriptor.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_set_io(struct acpi_resource *resource, union aml_resource *aml)
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{
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ACPI_FUNCTION_TRACE("rs_set_io");
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/* I/O Information Byte */
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aml->io.information = (u8) (resource->data.io.io_decode & 0x01);
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/*
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* Set the following contiguous fields in the AML descriptor:
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* Minimum Base Address
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* Maximum Base Address
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* Address Alignment
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* Length
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*/
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ACPI_MOVE_32_TO_16(&aml->io.minimum, &resource->data.io.minimum);
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ACPI_MOVE_32_TO_16(&aml->io.maximum, &resource->data.io.maximum);
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aml->io.alignment = (u8) resource->data.io.alignment;
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aml->io.address_length = (u8) resource->data.io.address_length;
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/* Complete the AML descriptor header */
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acpi_rs_set_resource_header(ACPI_RESOURCE_NAME_IO,
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sizeof(struct aml_resource_io), aml);
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_get_fixed_io
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*
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* PARAMETERS: Aml - Pointer to the AML resource descriptor
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* aml_resource_length - Length of the resource from the AML header
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* Resource - Where the internal resource is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert a raw AML resource descriptor to the corresponding
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* internal resource descriptor, simplifying bitflags and handling
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* alignment and endian issues if necessary.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_get_fixed_io(union aml_resource *aml,
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u16 aml_resource_length, struct acpi_resource *resource)
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{
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ACPI_FUNCTION_TRACE("rs_get_fixed_io");
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/*
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* Get the following contiguous fields from the AML descriptor:
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* Base Address
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* Length
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*/
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ACPI_MOVE_16_TO_32(&resource->data.fixed_io.address,
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&aml->fixed_io.address);
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resource->data.fixed_io.address_length = aml->fixed_io.address_length;
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/* Complete the resource header */
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resource->type = ACPI_RESOURCE_TYPE_FIXED_IO;
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resource->length = ACPI_SIZEOF_RESOURCE(struct acpi_resource_fixed_io);
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_set_fixed_io
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*
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* PARAMETERS: Resource - Pointer to the resource descriptor
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* Aml - Where the AML descriptor is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert an internal resource descriptor to the corresponding
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* external AML resource descriptor.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_set_fixed_io(struct acpi_resource *resource, union aml_resource *aml)
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{
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ACPI_FUNCTION_TRACE("rs_set_fixed_io");
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/*
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* Set the following contiguous fields in the AML descriptor:
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* Base Address
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* Length
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*/
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ACPI_MOVE_32_TO_16(&aml->fixed_io.address,
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&resource->data.fixed_io.address);
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aml->fixed_io.address_length =
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(u8) resource->data.fixed_io.address_length;
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/* Complete the AML descriptor header */
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acpi_rs_set_resource_header(ACPI_RESOURCE_NAME_FIXED_IO,
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sizeof(struct aml_resource_fixed_io), aml);
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_get_dma
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*
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* PARAMETERS: Aml - Pointer to the AML resource descriptor
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* aml_resource_length - Length of the resource from the AML header
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* Resource - Where the internal resource is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert a raw AML resource descriptor to the corresponding
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* internal resource descriptor, simplifying bitflags and handling
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* alignment and endian issues if necessary.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_get_dma(union aml_resource *aml,
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u16 aml_resource_length, struct acpi_resource *resource)
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{
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u32 channel_count = 0;
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u32 i;
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u8 temp8;
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ACPI_FUNCTION_TRACE("rs_get_dma");
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/* Decode the DMA channel bits */
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for (i = 0; i < 8; i++) {
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if ((aml->dma.dma_channel_mask >> i) & 0x01) {
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resource->data.dma.channels[channel_count] = i;
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channel_count++;
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}
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}
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resource->length = 0;
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resource->data.dma.channel_count = channel_count;
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/*
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* Calculate the structure size based upon the number of channels
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* Note: Zero DMA channels is valid
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*/
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if (channel_count > 0) {
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resource->length = (u32) (channel_count - 1) * 4;
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}
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/* Get the flags: transfer preference, bus mastering, channel speed */
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temp8 = aml->dma.flags;
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resource->data.dma.transfer = temp8 & 0x03;
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resource->data.dma.bus_master = (temp8 >> 2) & 0x01;
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resource->data.dma.type = (temp8 >> 5) & 0x03;
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if (resource->data.dma.transfer == 0x03) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Invalid DMA.Transfer preference (3)\n"));
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return_ACPI_STATUS(AE_BAD_DATA);
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}
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/* Complete the resource header */
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resource->type = ACPI_RESOURCE_TYPE_DMA;
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resource->length += ACPI_SIZEOF_RESOURCE(struct acpi_resource_dma);
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_set_dma
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*
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* PARAMETERS: Resource - Pointer to the resource descriptor
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* Aml - Where the AML descriptor is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert an internal resource descriptor to the corresponding
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* external AML resource descriptor.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_set_dma(struct acpi_resource *resource, union aml_resource *aml)
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{
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u8 i;
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ACPI_FUNCTION_TRACE("rs_set_dma");
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/* Convert channel list to 8-bit DMA channel bitmask */
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aml->dma.dma_channel_mask = 0;
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for (i = 0; i < resource->data.dma.channel_count; i++) {
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aml->dma.dma_channel_mask |=
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(1 << resource->data.dma.channels[i]);
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}
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/* Set the DMA Flag bits */
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aml->dma.flags = (u8)
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(((resource->data.dma.type & 0x03) << 5) |
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((resource->data.dma.bus_master & 0x01) << 2) |
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(resource->data.dma.transfer & 0x03));
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/* Complete the AML descriptor header */
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acpi_rs_set_resource_header(ACPI_RESOURCE_NAME_DMA,
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sizeof(struct aml_resource_dma), aml);
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return_ACPI_STATUS(AE_OK);
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}
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