1 /** @file 2 3 Abstractions for simple OMAP DMA. 4 OMAP_DMA4 structure elements are described in the OMAP35xx TRM. 5 6 Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR> 7 8 This program and the accompanying materials 9 are licensed and made available under the terms and conditions of the BSD License 10 which accompanies this distribution. The full text of the license may be found at 11 http://opensource.org/licenses/bsd-license.php 12 13 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 14 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 15 16 **/ 17 18 #ifndef __OMAP_DMA_LIB_H__ 19 #define __OMAP_DMA_LIB_H__ 20 21 22 // Example from DMA chapter of the OMAP35xx spec 23 typedef struct { 24 UINT8 DataType; // DMA4_CSDPi[1:0] 25 UINT8 ReadPortAccessType; // DMA4_CSDPi[8:7] 26 UINT8 WritePortAccessType; // DMA4_CSDPi[15:14] 27 UINT8 SourceEndiansim; // DMA4_CSDPi[21] 28 UINT8 DestinationEndianism; // DMA4_CSDPi[19] 29 UINT8 WriteMode; // DMA4_CSDPi[17:16] 30 UINT8 SourcePacked; // DMA4_CSDPi[6] 31 UINT8 DestinationPacked; // DMA4_CSDPi[13] 32 UINT32 NumberOfElementPerFrame; // DMA4_CENi 33 UINT32 NumberOfFramePerTransferBlock; // DMA4_CFNi 34 UINT32 SourceStartAddress; // DMA4_CSSAi 35 UINT32 DestinationStartAddress; // DMA4_CDSAi 36 UINT32 SourceElementIndex; // DMA4_CSEi 37 UINT32 SourceFrameIndex; // DMA4_CSFi 38 UINT32 DestinationElementIndex; // DMA4_CDEi 39 UINT32 DestinationFrameIndex; // DMA4_CDFi 40 UINT8 ReadPortAccessMode; // DMA4_CCRi[13:12] 41 UINT8 WritePortAccessMode; // DMA4_CCRi[15:14] 42 UINT8 ReadPriority; // DMA4_CCRi[6] 43 UINT8 WritePriority; // DMA4_CCRi[23] 44 UINT8 ReadRequestNumber; // DMA4_CCRi[4:0] 45 UINT8 WriteRequestNumber; // DMA4_CCRi[20:19] 46 } OMAP_DMA4; 47 48 49 /** 50 Configure OMAP DMA Channel 51 52 @param Channel DMA Channel to configure 53 @param Dma4 Pointer to structure used to initialize DMA registers for the Channel 54 55 @retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes. 56 @retval EFI_INVALID_PARAMETER Channel is not valid 57 @retval EFI_DEVICE_ERROR The system hardware could not map the requested information. 58 59 **/ 60 EFI_STATUS 61 EFIAPI 62 EnableDmaChannel ( 63 IN UINTN Channel, 64 IN OMAP_DMA4 *Dma4 65 ); 66 67 /** 68 Turn of DMA channel configured by EnableDma(). 69 70 @param Channel DMA Channel to configure 71 @param SuccesMask Bits in DMA4_CSR register indicate EFI_SUCCESS 72 @param ErrorMask Bits in DMA4_CSR register indicate EFI_DEVICE_ERROR 73 74 @retval EFI_SUCCESS DMA hardware disabled 75 @retval EFI_INVALID_PARAMETER Channel is not valid 76 @retval EFI_DEVICE_ERROR The system hardware could not map the requested information. 77 78 **/ 79 EFI_STATUS 80 EFIAPI 81 DisableDmaChannel ( 82 IN UINTN Channel, 83 IN UINT32 SuccessMask, 84 IN UINT32 ErrorMask 85 ); 86 87 88 89 #endif 90 91
