diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/atsam/libraries/libchip/source/spi_dma.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/atsam/libraries/libchip/source/spi_dma.c | 392 |
1 files changed, 0 insertions, 392 deletions
diff --git a/c/src/lib/libbsp/arm/atsam/libraries/libchip/source/spi_dma.c b/c/src/lib/libbsp/arm/atsam/libraries/libchip/source/spi_dma.c deleted file mode 100644 index 8cd9ed1ddd..0000000000 --- a/c/src/lib/libbsp/arm/atsam/libraries/libchip/source/spi_dma.c +++ /dev/null @@ -1,392 +0,0 @@ -/* ---------------------------------------------------------------------------- */ -/* Atmel Microcontroller Software Support */ -/* SAM Software Package License */ -/* ---------------------------------------------------------------------------- */ -/* Copyright (c) 2015, Atmel Corporation */ -/* */ -/* All rights reserved. */ -/* */ -/* Redistribution and use in source and binary forms, with or without */ -/* modification, are permitted provided that the following condition is 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. */ -/* ---------------------------------------------------------------------------- */ - -/** - * \addtogroup spi_dma_module SPI xDMA driver - * \ingroup lib_spiflash - * \section Usage - * - * <ul> - * <li> SPID_Configure() initializes and configures the SPI peripheral and xDMA - * for data transfer.</li> - * <li> Configures the parameters for the device corresponding to the cs value - * by SPID_ConfigureCS(). </li> - * <li> Starts a SPI master transfer. This is a non blocking function - * SPID_SendCommand(). It will - * return as soon as the transfer is started..</li> - * </ul> - * - */ - -/** - * \file - * - * Implementation for the SPI Flash with xDMA driver. - * - */ - - -/*---------------------------------------------------------------------------- - * Headers - *----------------------------------------------------------------------------*/ - -#include "chip.h" - -/*---------------------------------------------------------------------------- - * Definitions - *----------------------------------------------------------------------------*/ - -/** xDMA support */ -#define USE_SPI_DMA - -/** xDMA Link List size for SPI transmission*/ -#define DMA_SPI_LLI 2 - -/*---------------------------------------------------------------------------- - * Macros - *----------------------------------------------------------------------------*/ - -/*---------------------------------------------------------------------------- - * Local Variables - *----------------------------------------------------------------------------*/ - - -/* DMA driver instance */ -static uint32_t spiDmaTxChannel; -static uint32_t spiDmaRxChannel; - -/*---------------------------------------------------------------------------- - * Local functions - *----------------------------------------------------------------------------*/ - -/** - * \brief SPI xDMA Rx callback - * Invoked on SPi DMA reception done. - * \param channel DMA channel. - * \param pArg Pointer to callback argument - Pointer to Spid instance. - */ -static void SPID_Rx_Cb(uint32_t channel, Spid *pArg) -{ - SpidCmd *pSpidCmd = pArg->pCurrentCommand; - Spi *pSpiHw = pArg->pSpiHw; - - if (channel != spiDmaRxChannel) - return; - - /* Disable the SPI TX & RX */ - SPI_Disable (pSpiHw); - TRACE_INFO("SPI Rx DMA Callback has been called %d bytes received\n\r", - pArg->pCurrentCommand->RxSize); - /* Configure and enable interrupt on RC compare */ - NVIC_ClearPendingIRQ(XDMAC_IRQn); - NVIC_DisableIRQ(XDMAC_IRQn); - - /* Disable the SPI Peripheral */ - PMC_DisablePeripheral (pArg->spiId); - - /* Release CS */ - SPI_ReleaseCS(pSpiHw); - - /* Release the DMA channels */ - XDMAD_FreeChannel(pArg->pXdmad, spiDmaRxChannel); - XDMAD_FreeChannel(pArg->pXdmad, spiDmaTxChannel); - SCB_InvalidateDCache_by_Addr((uint32_t *)pArg->pCurrentCommand->pRxBuff, - pArg->pCurrentCommand->RxSize); - /* Release the dataflash semaphore */ - pArg->semaphore++; - - printf(" %s\n\r", pArg->pCurrentCommand->pRxBuff); - - /* Invoke the callback associated with the current command */ - if (pSpidCmd && pSpidCmd->callback) { - //printf("p %d", pArg->semaphore); - pSpidCmd->callback(0, pSpidCmd->pArgument); - } -} - -/** - * \brief Configure the DMA Channels: 0 RX, 1 TX. - * Channels are disabled after configure. - * \returns 0 if the dma channel configuration successfully; otherwise returns - * SPID_ERROR_XXX. - */ -static uint8_t _spid_configureDmaChannels(Spid *pSpid) -{ - /* Driver initialize */ - XDMAD_FreeChannel(pSpid->pXdmad, spiDmaTxChannel); - XDMAD_FreeChannel(pSpid->pXdmad, spiDmaRxChannel); - - /* Allocate a DMA channel for SPI0/1 TX. */ - spiDmaTxChannel = XDMAD_AllocateChannel(pSpid->pXdmad, - XDMAD_TRANSFER_MEMORY, pSpid->spiId); - - if (spiDmaTxChannel == XDMAD_ALLOC_FAILED) - return SPID_ERROR; - - /* Allocate a DMA channel for SPI0/1 RX. */ - spiDmaRxChannel = - XDMAD_AllocateChannel(pSpid->pXdmad, pSpid->spiId, XDMAD_TRANSFER_MEMORY); - - if (spiDmaRxChannel == XDMAD_ALLOC_FAILED) - return SPID_ERROR; - - /* Setup callbacks for SPI0/1 RX */ - XDMAD_SetCallback(pSpid->pXdmad, spiDmaRxChannel, - (XdmadTransferCallback)SPID_Rx_Cb, pSpid); - - if (XDMAD_PrepareChannel(pSpid->pXdmad, spiDmaRxChannel)) - return SPID_ERROR; - - /* Setup callbacks for SPI0/1 TX (ignored) */ - XDMAD_SetCallback(pSpid->pXdmad, spiDmaTxChannel, NULL, NULL); - - if (XDMAD_PrepareChannel(pSpid->pXdmad, spiDmaTxChannel)) - return SPID_ERROR; - - return 0; -} - -/** - * \brief Configure the DMA source and destination with Linker List mode. - * - * \param pCommand Pointer to command - * \returns 0 if the dma multibuffer configuration successfully; otherwise - * returns SPID_ERROR_XXX. - */ -static uint8_t _spid_configureLinkList(Spi *pSpiHw, void *pXdmad, - SpidCmd *pCommand) -{ - sXdmadCfg xdmadRxCfg, xdmadTxCfg; - uint32_t xdmaCndc, xdmaInt; - uint32_t spiId; - - if ((unsigned int)pSpiHw == (unsigned int)SPI0) spiId = ID_SPI0; - - if ((unsigned int)pSpiHw == (unsigned int)SPI1) spiId = ID_SPI1; - - /* Setup TX */ - - xdmadTxCfg.mbr_sa = (uint32_t)pCommand->pTxBuff; - - xdmadTxCfg.mbr_da = (uint32_t)&pSpiHw->SPI_TDR; - - xdmadTxCfg.mbr_ubc = XDMA_UBC_NVIEW_NDV0 | - XDMA_UBC_NDE_FETCH_DIS | - XDMA_UBC_NSEN_UPDATED | pCommand->TxSize; - - xdmadTxCfg.mbr_cfg = XDMAC_CC_TYPE_PER_TRAN | - XDMAC_CC_MBSIZE_SINGLE | - XDMAC_CC_DSYNC_MEM2PER | - XDMAC_CC_CSIZE_CHK_1 | - XDMAC_CC_DWIDTH_BYTE | - XDMAC_CC_SIF_AHB_IF1 | - XDMAC_CC_DIF_AHB_IF1 | - XDMAC_CC_SAM_INCREMENTED_AM | - XDMAC_CC_DAM_FIXED_AM | - XDMAC_CC_PERID(XDMAIF_Get_ChannelNumber(spiId, XDMAD_TRANSFER_TX)); - - - xdmadTxCfg.mbr_bc = 0; - xdmadTxCfg.mbr_sus = 0; - xdmadTxCfg.mbr_dus = 0; - - /* Setup RX Link List */ - - xdmadRxCfg.mbr_ubc = XDMA_UBC_NVIEW_NDV0 | - XDMA_UBC_NDE_FETCH_DIS | - XDMA_UBC_NDEN_UPDATED | pCommand->RxSize; - - xdmadRxCfg.mbr_da = (uint32_t)pCommand->pRxBuff; - - xdmadRxCfg.mbr_sa = (uint32_t)&pSpiHw->SPI_RDR; - xdmadRxCfg.mbr_cfg = XDMAC_CC_TYPE_PER_TRAN | - XDMAC_CC_MBSIZE_SINGLE | - XDMAC_CC_DSYNC_PER2MEM | - XDMAC_CC_CSIZE_CHK_1 | - XDMAC_CC_DWIDTH_BYTE | - XDMAC_CC_SIF_AHB_IF1 | - XDMAC_CC_DIF_AHB_IF1 | - XDMAC_CC_SAM_FIXED_AM | - XDMAC_CC_DAM_INCREMENTED_AM | - XDMAC_CC_PERID(XDMAIF_Get_ChannelNumber(spiId, XDMAD_TRANSFER_RX)); - - - xdmadRxCfg.mbr_bc = 0; - xdmadRxCfg.mbr_sus = 0; - xdmadRxCfg.mbr_dus = 0; - - xdmaCndc = 0; - - /* Put all interrupts on for non LLI list setup of DMA */ - xdmaInt = (XDMAC_CIE_BIE | - XDMAC_CIE_DIE | - XDMAC_CIE_FIE | - XDMAC_CIE_RBIE | - XDMAC_CIE_WBIE | - XDMAC_CIE_ROIE); - - if (XDMAD_ConfigureTransfer(pXdmad, spiDmaRxChannel, &xdmadRxCfg, xdmaCndc, 0, - xdmaInt)) - return SPID_ERROR; - - if (XDMAD_ConfigureTransfer(pXdmad, spiDmaTxChannel, &xdmadTxCfg, xdmaCndc, 0, - xdmaInt)) - return SPID_ERROR; - - return 0; -} - - -/*---------------------------------------------------------------------------- - * Exported functions - *----------------------------------------------------------------------------*/ -/** - * \brief Initializes the Spid structure and the corresponding SPI & DMA hardware. - * select value. - * The driver will uses DMA channel 0 for RX and DMA channel 1 for TX. - * The DMA channels are freed automatically when no SPI command processing. - * - * \param pSpid Pointer to a Spid instance. - * \param pSpiHw Associated SPI peripheral. - * \param spiId SPI peripheral identifier. - * \param pDmad Pointer to a Dmad instance. - */ -uint32_t SPID_Configure(Spid *pSpid , - Spi *pSpiHw , - uint8_t spiId, - uint32_t spiMode, - sXdmad *pXdmad) -{ - /* Initialize the SPI structure */ - pSpid->pSpiHw = pSpiHw; - pSpid->spiId = spiId; - pSpid->semaphore = 1; - pSpid->pCurrentCommand = 0; - assert(pXdmad == &XDMAD_Instance); - pSpid->pXdmad = pXdmad; - - /* Enable the SPI Peripheral ,Execute a software reset of the SPI, - Configure SPI in Master Mode*/ - SPI_Configure (pSpiHw, pSpid->spiId, spiMode); - - return 0; -} - -/** - * \brief Configures the parameters for the device corresponding to the cs value. - * - * \param pSpid Pointer to a Spid instance. - * \param cs number corresponding to the SPI chip select. - * \param csr SPI_CSR value to setup. - */ -void SPID_ConfigureCS(Spid *pSpid, - uint32_t dwCS, - uint32_t dwCsr) -{ - Spi *pSpiHw = pSpid->pSpiHw; - - /* Enable the SPI Peripheral */ - PMC_EnablePeripheral (pSpid->spiId); - /* Configure SPI Chip Select Register */ - SPI_ConfigureNPCS(pSpiHw, dwCS, dwCsr); - - /* Disable the SPI Peripheral */ - PMC_DisablePeripheral (pSpid->spiId); - -} - -/** - * \brief Starts a SPI master transfer. This is a non blocking function. It will - * return as soon as the transfer is started. - * - * \param pSpid Pointer to a Spid instance. - * \param pCommand Pointer to the SPI command to execute. - * \returns 0 if the transfer has been started successfully; otherwise returns - * SPID_ERROR_LOCK is the driver is in use, or SPID_ERROR if the command is not - * valid. - */ -uint32_t SPID_SendCommand(Spid *pSpid, SpidCmd *pCommand) -{ - Spi *pSpiHw = pSpid->pSpiHw; - - /* Try to get the dataflash semaphore */ - if (pSpid->semaphore == 0) - return SPID_ERROR_LOCK; - - pSpid->semaphore--; - - /* Enable the SPI Peripheral */ - PMC_EnablePeripheral (pSpid->spiId); - - /* SPI chip select */ - SPI_ChipSelect (pSpiHw, 1 << pCommand->spiCs); - - // Initialize the callback - pSpid->pCurrentCommand = pCommand; - - /* Initialize DMA controller using channel 0 for RX, 1 for TX. */ - if (_spid_configureDmaChannels(pSpid)) - return SPID_ERROR_LOCK; - - /* Configure and enable interrupt on RC compare */ - NVIC_ClearPendingIRQ(XDMAC_IRQn); - NVIC_SetPriority(XDMAC_IRQn , 1); - NVIC_EnableIRQ(XDMAC_IRQn); - - - if (_spid_configureLinkList(pSpiHw, pSpid->pXdmad, pCommand)) - return SPID_ERROR_LOCK; - - /* Enables the SPI to transfer and receive data. */ - SPI_Enable (pSpiHw); - SCB_CleanDCache_by_Addr((uint32_t *)pCommand->pTxBuff, pCommand->TxSize); - - /* Start DMA 0(RX) && 1(TX) */ - if (XDMAD_StartTransfer(pSpid->pXdmad, spiDmaRxChannel)) - return SPID_ERROR_LOCK; - - if (XDMAD_StartTransfer(pSpid->pXdmad, spiDmaTxChannel)) - return SPID_ERROR_LOCK; - - return 0; -} - -/** - * \brief Check if the SPI driver is busy. - * - * \param pSpid Pointer to a Spid instance. - * \returns 1 if the SPI driver is currently busy executing a command; otherwise - */ -uint32_t SPID_IsBusy(const Spid *pSpid) -{ - if (pSpid->semaphore == 0) - return 1; - else - return 0; -} |