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/** @file
Abstractions for simple OMAP DMA.
OMAP_DMA4 structure elements are described in the OMAP35xx TRM.
Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef __OMAP_DMA_LIB_H__
#define __OMAP_DMA_LIB_H__
// Example from DMA chapter of the OMAP35xx spec
typedef struct {
UINT8 DataType; // DMA4_CSDPi[1:0]
UINT8 ReadPortAccessType; // DMA4_CSDPi[8:7]
UINT8 WritePortAccessType; // DMA4_CSDPi[15:14]
UINT8 SourceEndiansim; // DMA4_CSDPi[21]
UINT8 DestinationEndianism; // DMA4_CSDPi[19]
UINT8 WriteMode; // DMA4_CSDPi[17:16]
UINT8 SourcePacked; // DMA4_CSDPi[6]
UINT8 DestinationPacked; // DMA4_CSDPi[13]
UINT32 NumberOfElementPerFrame; // DMA4_CENi
UINT32 NumberOfFramePerTransferBlock; // DMA4_CFNi
UINT32 SourceStartAddress; // DMA4_CSSAi
UINT32 DestinationStartAddress; // DMA4_CDSAi
UINT32 SourceElementIndex; // DMA4_CSEi
UINT32 SourceFrameIndex; // DMA4_CSFi
UINT32 DestinationElementIndex; // DMA4_CDEi
UINT32 DestinationFrameIndex; // DMA4_CDFi
UINT8 ReadPortAccessMode; // DMA4_CCRi[13:12]
UINT8 WritePortAccessMode; // DMA4_CCRi[15:14]
UINT8 ReadPriority; // DMA4_CCRi[6]
UINT8 WritePriority; // DMA4_CCRi[23]
UINT8 ReadRequestNumber; // DMA4_CCRi[4:0]
UINT8 WriteRequestNumber; // DMA4_CCRi[20:19]
} OMAP_DMA4;
/**
Configure OMAP DMA Channel
@param Channel DMA Channel to configure
@param Dma4 Pointer to structure used to initialize DMA registers for the Channel
@retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.
@retval EFI_INVALID_PARAMETER Channel is not valid
@retval EFI_DEVICE_ERROR The system hardware could not map the requested information.
**/
EFI_STATUS
EFIAPI
EnableDmaChannel (
IN UINTN Channel,
IN OMAP_DMA4 *Dma4
);
/**
Turn of DMA channel configured by EnableDma().
@param Channel DMA Channel to configure
@param SuccesMask Bits in DMA4_CSR register indicate EFI_SUCCESS
@param ErrorMask Bits in DMA4_CSR register indicate EFI_DEVICE_ERROR
@retval EFI_SUCCESS DMA hardware disabled
@retval EFI_INVALID_PARAMETER Channel is not valid
@retval EFI_DEVICE_ERROR The system hardware could not map the requested information.
**/
EFI_STATUS
EFIAPI
DisableDmaChannel (
IN UINTN Channel,
IN UINT32 SuccessMask,
IN UINT32 ErrorMask
);
#endif
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