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[mirror_edk2.git] / Omap35xxPkg / Include / Library / OmapDmaLib.h
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1e57a462 1/** @file\r
2\r
3 Abstractions for simple OMAP DMA. \r
4 OMAP_DMA4 structure elements are described in the OMAP35xx TRM. \r
5\r
6 Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r
7\r
8 This program and the accompanying materials\r
9 are licensed and made available under the terms and conditions of the BSD License\r
10 which accompanies this distribution. The full text of the license may be found at\r
11 http://opensource.org/licenses/bsd-license.php\r
12\r
13 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
14 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
15\r
16**/\r
17\r
18#ifndef __OMAP_DMA_LIB_H__\r
19#define __OMAP_DMA_LIB_H__\r
20\r
21\r
22// Example from DMA chapter of the OMAP35xx spec\r
7f814ffd 23typedef struct {\r
24 UINT8 DataType; // DMA4_CSDPi[1:0]\r
25 UINT8 ReadPortAccessType; // DMA4_CSDPi[8:7]\r
26 UINT8 WritePortAccessType; // DMA4_CSDPi[15:14]\r
27 UINT8 SourceEndiansim; // DMA4_CSDPi[21]\r
28 UINT8 DestinationEndianism; // DMA4_CSDPi[19]\r
29 UINT8 WriteMode; // DMA4_CSDPi[17:16]\r
30 UINT8 SourcePacked; // DMA4_CSDPi[6]\r
31 UINT8 DestinationPacked; // DMA4_CSDPi[13]\r
32 UINT32 NumberOfElementPerFrame; // DMA4_CENi\r
33 UINT32 NumberOfFramePerTransferBlock; // DMA4_CFNi\r
34 UINT32 SourceStartAddress; // DMA4_CSSAi\r
35 UINT32 DestinationStartAddress; // DMA4_CDSAi\r
36 UINT32 SourceElementIndex; // DMA4_CSEi\r
37 UINT32 SourceFrameIndex; // DMA4_CSFi\r
38 UINT32 DestinationElementIndex; // DMA4_CDEi\r
39 UINT32 DestinationFrameIndex; // DMA4_CDFi\r
40 UINT8 ReadPortAccessMode; // DMA4_CCRi[13:12]\r
41 UINT8 WritePortAccessMode; // DMA4_CCRi[15:14]\r
42 UINT8 ReadPriority; // DMA4_CCRi[6]\r
43 UINT8 WritePriority; // DMA4_CCRi[23]\r
44 UINT8 ReadRequestNumber; // DMA4_CCRi[4:0]\r
1e57a462 45 UINT8 WriteRequestNumber; // DMA4_CCRi[20:19]\r
46} OMAP_DMA4;\r
47\r
48\r
7f814ffd 49/** \r
50 Configure OMAP DMA Channel\r
51 \r
52 @param Channel DMA Channel to configure\r
53 @param Dma4 Pointer to structure used to initialize DMA registers for the Channel \r
54 \r
55 @retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.\r
56 @retval EFI_INVALID_PARAMETER Channel is not valid\r
57 @retval EFI_DEVICE_ERROR The system hardware could not map the requested information.\r
58 \r
1e57a462 59**/\r
60EFI_STATUS\r
61EFIAPI\r
62EnableDmaChannel (\r
63 IN UINTN Channel,\r
64 IN OMAP_DMA4 *Dma4\r
65 );\r
66\r
7f814ffd 67/** \r
68 Turn of DMA channel configured by EnableDma().\r
69 \r
70 @param Channel DMA Channel to configure\r
9f6b977f 71 @param SuccesMask Bits in DMA4_CSR register indicate EFI_SUCCESS\r
72 @param ErrorMask Bits in DMA4_CSR register indicate EFI_DEVICE_ERROR\r
7f814ffd 73 \r
74 @retval EFI_SUCCESS DMA hardware disabled\r
75 @retval EFI_INVALID_PARAMETER Channel is not valid\r
76 @retval EFI_DEVICE_ERROR The system hardware could not map the requested information.\r
77 \r
1e57a462 78**/\r
79EFI_STATUS\r
80EFIAPI\r
81DisableDmaChannel (\r
82 IN UINTN Channel,\r
83 IN UINT32 SuccessMask,\r
84 IN UINT32 ErrorMask\r
85 );\r
86\r
87\r
88\r
89#endif \r
90\r