1 files changed, 90 insertions, 0 deletions
diff --git a/Omap44xxPkg/Include/Library/OmapDmaLib.h b/Omap44xxPkg/Include/Library/OmapDmaLib.h
new file mode 100755
index 000000000..9d81d5049
--- /dev/null
+++ b/Omap44xxPkg/Include/Library/OmapDmaLib.h
@@ -0,0 +1,90 @@
+/** @file
+
+  Abstractions for simple OMAP DMA. 
+  OMAP_DMA4 structure elements are described in the OMAP44xx 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 OMAP44xx 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 
+