| /* ---------------------------------------------------------------------------- | |
| * ATMEL Microcontroller Software Support | |
| * ---------------------------------------------------------------------------- | |
| * Copyright (c) 2010, Atmel Corporation | |
| * | |
| * All rights reserved. | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions are met: | |
| * | |
| * - Redistributions of source code must retain the above copyright notice, | |
| * this list of conditions and the disclaimer below. | |
| * | |
| * Atmel's name may not be used to endorse or promote products derived from | |
| * this software without specific prior written permission. | |
| * | |
| * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR | |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE | |
| * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| * INCIDENTAL, 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 DAMAGE. | |
| * ---------------------------------------------------------------------------- | |
| */ | |
| #ifndef _DMAD_H | |
| #define _DMAD_H | |
| /** \addtogroup dmad_module | |
| *@{ | |
| */ | |
| /*---------------------------------------------------------------------------- | |
| * Includes | |
| *----------------------------------------------------------------------------*/ | |
| #include "board.h" | |
| /** \addtogroup dmad_defines DMA Driver Defines | |
| @{*/ | |
| /*---------------------------------------------------------------------------- | |
| * Consts | |
| *----------------------------------------------------------------------------*/ | |
| #define DMAD_TRANSFER_MEMORY 0xFF /**< DMA transfer from or to memory */ | |
| #define DMAD_ALLOC_FAILED 0xFFFF /**< Channel allocate failed */ | |
| #define DMAD_TRANSFER_TX 0 | |
| #define DMAD_TRANSFER_RX 1 | |
| /*---------------------------------------------------------------------------- | |
| * MACRO | |
| *----------------------------------------------------------------------------*/ | |
| /** @}*/ | |
| /*---------------------------------------------------------------------------- | |
| * Types | |
| *----------------------------------------------------------------------------*/ | |
| /** \addtogroup dmad_structs DMA Driver Structs | |
| @{*/ | |
| /** DMA status or return code */ | |
| typedef enum _DmadStatus { | |
| DMAD_OK = 0, /**< Operation is sucessful */ | |
| DMAD_BUSY, /**< Channel occupied or transfer not finished */ | |
| DMAD_PARTIAL_DONE, /**< Partial of LLI finished (on each buffer done) */ | |
| DMAD_ERROR, /**< Operation failed */ | |
| DMAD_CANCELED /**< Operation canceled */ | |
| } eDmadStatus, eDmadRC; | |
| /** DMA state for channel */ | |
| typedef enum _DmadState { | |
| DMAD_FREE = 0, /**< Free channel */ | |
| DMAD_IN_USE, /**< Allocated to some peripheral */ | |
| DMAD_IN_XFR, /**< Transferring something */ | |
| DMAD_STALL /**< Error stall */ | |
| } eDmadState; | |
| /** DMA transfer callback */ | |
| typedef void (*DmadTransferCallback)(uint32_t status, void* pArg); | |
| /** DMA driver channel */ | |
| typedef struct _DmadChannel { | |
| DmadTransferCallback fCallback; /**< Callback */ | |
| void* pArg; /**< Callback argument */ | |
| uint8_t bIrqOwner; /**< Uses DMA handler or external one */ | |
| uint8_t bSrcPeriphID; /**< HW ID for source */ | |
| uint8_t bDstPeriphID; /**< HW ID for destination */ | |
| uint8_t bSrcTxIfID; /**< DMA Tx Interface ID for source */ | |
| uint8_t bSrcRxIfID; /**< DMA Rx Interface ID for source */ | |
| uint8_t bDstTxIfID; /**< DMA Tx Interface ID for destination */ | |
| uint8_t bDstRxIfID; /**< DMA Rx Interface ID for destination */ | |
| volatile uint8_t state; /**< DMA channel state */ | |
| } sDmadChannel; | |
| #if 0 | |
| /** DMA driver controller */ | |
| typedef struct _DmadController { | |
| Dmac *pHw; /**< Pointer to controler HW base */ | |
| sDmadChannel* dmadChannels; /**< Pointer to driver channels list */ | |
| uint8_t* dmadIfUsage; /**< AHB Interface usage counting */ | |
| uint8_t bHwID; /**< ID for DMAC */ | |
| uint8_t bNumChannels; /**< Number of channels for this controller */ | |
| uint8_t bNumAHBIf; /**< Number of AHB Interface */ | |
| uint8_t reserved; | |
| } sDmadController; | |
| #endif | |
| /** DMA driver instance */ | |
| typedef struct _Dmad { | |
| Dmac *pDmacs[2]; | |
| sDmadChannel dmaChannels[2][8]; | |
| uint8_t numControllers; | |
| uint8_t numChannels; | |
| uint8_t pollingMode; | |
| uint8_t pollingTimeout; | |
| } sDmad; | |
| /** DMA driver channel ID */ | |
| typedef struct _DmadChannelID { | |
| uint8_t bDmac; /**< DMA Controller number */ | |
| uint8_t bChannel; /**< Channel number */ | |
| } sDmadChannelID; | |
| /** @}*/ | |
| /*---------------------------------------------------------------------------- | |
| * Exported functions | |
| *----------------------------------------------------------------------------*/ | |
| /** \addtogroup dmad_functions DMA Driver Functionos | |
| @{*/ | |
| extern void DMAD_Initialize( sDmad *pDmad, | |
| uint8_t bPollingMode ); | |
| extern void DMAD_Handler( sDmad *pDmad ); | |
| extern uint32_t DMAD_AllocateChannel( sDmad *pDmad, | |
| uint8_t bSrcID, uint8_t bDstID); | |
| extern eDmadRC DMAD_FreeChannel( sDmad *pDmad, uint32_t dwChannel ); | |
| extern eDmadRC DMAD_SetCallback( sDmad *pDmad, uint32_t dwChannel, | |
| DmadTransferCallback fCallback, void* pArg ); | |
| extern eDmadRC DMAD_ConfigurePIP( sDmad *pDmad, uint32_t dwChannel, | |
| uint32_t dwSrcPIP, uint32_t dwDstPIP ); | |
| extern eDmadRC DMAD_PrepareChannel( sDmad *pDmad, uint32_t dwChannel, | |
| uint32_t dwCfg ); | |
| extern eDmadRC DMAD_IsTransferDone( sDmad *pDmad, uint32_t dwChannel ); | |
| extern eDmadRC DMAD_StartTransfer( sDmad *pDmad, uint32_t dwChannel ); | |
| extern eDmadRC DMAD_StartTransfers( sDmad *pDmad, | |
| uint8_t bDmac, uint32_t bmChannels ); | |
| extern eDmadRC DMAD_StopTransfer( sDmad *pDmad, uint32_t dwChannel ); | |
| extern void DMAD_ClearAuto( sDmad *pDmad, uint32_t _dwChannel ); | |
| extern eDmadRC DMAD_PrepareSingleTransfer( sDmad *pDmad, uint32_t dwChannel, | |
| sDmaTransferDescriptor *pXfrDesc ); | |
| extern eDmadRC DMAD_PrepareMultiTransfer( sDmad *pDmad, uint32_t dwChannel, | |
| sDmaTransferDescriptor *pXfrDesc ); | |
| /** @}*/ | |
| /**@}*/ | |
| #endif //#ifndef _DMAD_H | |