/*******************************************************************************
*
* 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_get_io
*
* PARAMETERS: Aml - Pointer to the AML resource descriptor
* aml_resource_length - Length of the resource from the AML header
* Resource - Where the internal resource is returned
*
* RETURN: Status
*
* DESCRIPTION: Convert a raw AML resource descriptor to the corresponding
* internal resource descriptor, simplifying bitflags and handling
* alignment and endian issues if necessary.
*
******************************************************************************/
acpi_status
acpi_rs_get_io(union aml_resource *aml,
u16 aml_resource_length, struct acpi_resource *resource)
{
ACPI_FUNCTION_TRACE("rs_get_io");
/* Get the Decode flag */
resource->data.io.io_decode = aml->io.information & 0x01;
/*
* Get the following contiguous fields from the AML descriptor:
* Minimum Base Address
* Maximum Base Address
* Address Alignment
* Length
*/
ACPI_MOVE_16_TO_32(&resource->data.io.minimum, &aml->io.minimum);
ACPI_MOVE_16_TO_32(&resource->data.io.maximum, &aml->io.maximum);
resource->data.io.alignment = aml->io.alignment;
resource->data.io.address_length = aml->io.address_length;
/* Complete the resource header */
resource->type = ACPI_RESOURCE_TYPE_IO;
resource->length = ACPI_SIZEOF_RESOURCE(struct acpi_resource_io);
return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_set_io
*
* PARAMETERS: Resource - Pointer to the resource descriptor
* Aml - Where the AML descriptor is returned
*
* RETURN: Status
*
* DESCRIPTION: Convert an internal resource descriptor to the corresponding
* external AML resource descriptor.
*
******************************************************************************/
acpi_status
acpi_rs_set_io(struct acpi_resource *resource, union aml_resource *aml)
{
ACPI_FUNCTION_TRACE("rs_set_io");
/* I/O Information Byte */
aml->io.information = (u8) (resource->data.io.io_decode & 0x01);
/*
* Set the following contiguous fields in the AML descriptor:
* Minimum Base Address
* Maximum Base Address
* Address Alignment
* Length
*/
ACPI_MOVE_32_TO_16(&aml->io.minimum, &resource->data.io.minimum);
ACPI_MOVE_32_TO_16(&aml->io.maximum, &resource->data.io.maximum);
aml->io.alignment = (u8) resource->data.io.alignment;
aml->io.address_length = (u8) resource->data.io.address_length;
/* Complete the AML descriptor header */
acpi_rs_set_resource_header(ACPI_RESOURCE_NAME_IO,
sizeof(struct aml_resource_io), aml);
return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_get_fixed_io
*
* PARAMETERS: Aml - Pointer to the AML resource descriptor
* aml_resource_length - Length of the resource from the AML header
* Resource - Where the internal resource is returned
*
* RETURN: Status
*
* DESCRIPTION: Convert a raw AML resource descriptor to the corresponding
* internal resource descriptor, simplifying bitflags and handling
* alignment and endian issues if necessary.
*
******************************************************************************/
acpi_status
acpi_rs_get_fixed_io(union aml_resource *aml,
u16 aml_resource_length, struct acpi_resource *resource)
{
ACPI_FUNCTION_TRACE("rs_get_fixed_io");
/*
* Get the following contiguous fields from the AML descriptor:
* Base Address
* Length
*/
ACPI_MOVE_16_TO_32(&resource->data.fixed_io.address,
&aml->fixed_io.address);
resource->data.fixed_io.address_length = aml->fixed_io.address_length;
/* Complete the resource header */
resource->type = ACPI_RESOURCE_TYPE_FIXED_IO;
resource->length = ACPI_SIZEOF_RESOURCE(struct acpi_resource_fixed_io);
return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_set_fixed_io
*
* PARAMETERS: Resource - Pointer to the resource descriptor
* Aml - Where the AML descriptor is returned
*
* RETURN: Status
*
* DESCRIPTION: Convert an internal resource descriptor to the corresponding
* external AML resource descriptor.
*
******************************************************************************/
acpi_status
acpi_rs_set_fixed_io(struct acpi_resource *resource, union aml_resource *aml)
{
ACPI_FUNCTION_TRACE("rs_set_fixed_io");
/*
* Set the following contiguous fields in the AML descriptor:
* Base Address
* Length
*/
ACPI_MOVE_32_TO_16(&aml->fixed_io.address,
&resource->data.fixed_io.address);
aml->fixed_io.address_length =
(u8) resource->data.fixed_io.address_length;
/* Complete the AML descriptor header */
acpi_rs_set_resource_header(ACPI_RESOURCE_NAME_FIXED_IO,
sizeof(struct aml_resource_fixed_io), aml);
return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_get_dma
*
* PARAMETERS: Aml - Pointer to the AML resource descriptor
* aml_resource_length - Length of the resource from the AML header
* Resource - Where the internal resource is returned
*
* RETURN: Status
*
* DESCRIPTION: Convert a raw AML resource descriptor to the corresponding
* internal resource descriptor, simplifying bitflags and handling
* alignment and endian issues if necessary.
*
******************************************************************************/
acpi_status
acpi_rs_get_dma(union aml_resource *aml,
u16 aml_resource_length, struct acpi_resource *resource)
{
u32 channel_count = 0;
u32 i;
u8 temp8;
ACPI_FUNCTION_TRACE("rs_get_dma");
/* Decode the DMA channel bits */
for (i = 0; i < 8; i++) {
if ((aml->dma.dma_channel_mask >> i) & 0x01) {
resource->data.dma.channels[channel_count] = i;
channel_count++;
}
}
resource->length = 0;
resource->data.dma.channel_count = channel_count;
/*
* Calculate the structure size based upon the number of channels
* Note: Zero DMA channels is valid
*/
if (channel_count > 0) {
resource->length = (u32) (channel_count - 1) * 4;
}
/* Get the flags: transfer preference, bus mastering, channel speed */
temp8 = aml->dma.flags;
resource->data.dma.transfer = temp8 & 0x03;
resource->data.dma.bus_master = (temp8 >> 2) & 0x01;
resource->data.dma.type = (temp8 >> 5) & 0x03;
if (resource->data.dma.transfer == 0x03) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Invalid DMA.Transfer preference (3)\n"));
return_ACPI_STATUS(AE_BAD_DATA);
}
/* Complete the resource header */
resource->type = ACPI_RESOURCE_TYPE_DMA;
resource->length += ACPI_SIZEOF_RESOURCE(struct acpi_resource_dma);
return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_set_dma
*
* PARAMETERS: Resource - Pointer to the resource descriptor
* Aml - Where the AML descriptor is returned
*
* RETURN: Status
*
* DESCRIPTION: Convert an internal resource descriptor to the corresponding
* external AML resource descriptor.
*
******************************************************************************/
acpi_status
acpi_rs_set_dma(struct acpi_resource *resource, union aml_resource *aml)
{
u8 i;
ACPI_FUNCTION_TRACE("rs_set_dma");
/* Convert channel list to 8-bit DMA channel bitmask */
aml->dma.dma_channel_mask = 0;
for (i = 0; i < resource->data.dma.channel_count; i++) {
aml->dma.dma_channel_mask |=
(1 << resource->data.dma.channels[i]);
}
/* Set the DMA Flag bits */
aml->dma.flags = (u8)
(((resource->data.dma.type & 0x03) << 5) |
((resource->data.dma.bus_master & 0x01) << 2) |
(resource->data.dma.transfer & 0x03));
/* Complete the AML descriptor header */
acpi_rs_set_resource_header(ACPI_RESOURCE_NAME_DMA,
sizeof(struct aml_resource_dma), aml);
return_ACPI_STATUS(AE_OK);
}
