mcspi/v0/mcspi.h

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/*
 *  Copyright (C) 2021-23 Texas Instruments Incorporated
 *
 *  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 following disclaimer.
 *
 *    Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the
 *    distribution.
 *
 *    Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *  OWNER OR CONTRIBUTORS 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,
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 *  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 MCSPI_H_
#define MCSPI_H_
 
/* ========================================================================== */
/*                             Include Files                                  */
/* ========================================================================== */
 
#include <stdint.h>
#include <kernel/dpl/SemaphoreP.h>
#include <kernel/dpl/HwiP.h>
#include <drivers/mcspi/v0/lld/mcspi_lld.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
/* ========================================================================== */
/*                           Macros & Typedefs                                */
/* ========================================================================== */
 
typedef void *MCSPI_Handle;
 
#define MCSPI_TRANSFER_MODE_BLOCKING    (0U)
 
#define MCSPI_TRANSFER_MODE_CALLBACK    (1U)
 
/* ========================================================================== */
/*                         Structure Declarations                             */
/* ========================================================================== */
 
typedef void (*MCSPI_CallbackFxn) (MCSPI_Handle handle,
                                   MCSPI_Transaction *transaction);
 
typedef struct
{
    uint32_t                transferMode;
    uint32_t                transferTimeout;
    MCSPI_CallbackFxn       transferCallbackFxn;
    uint32_t                msMode;
    int32_t                 mcspiDmaIndex;
} MCSPI_OpenParams;
 
typedef struct
{
    /*
     * SOC configuration
     */
    uint32_t                baseAddr;
    uint32_t                inputClkFreq;
    /*
     * Driver configuration
     */
    uint32_t                intrNum;
    uint32_t                operMode;
    uint8_t                 intrPriority;
    /*
     * MCSPI instance configuration - common across all channels
     */
    uint32_t                chMode;
    uint32_t                pinMode;
    uint32_t                initDelay;
    uint32_t                multiWordAccess;
} MCSPI_Attrs;
 
/* ========================================================================== */
/*                  Internal/Private Structure Declarations                   */
/* ========================================================================== */
 
typedef struct
{
    /*
     * User parameters
     */
    MCSPI_Handle            handle;
    MCSPI_OpenParams        openPrms;
    uint32_t                baseAddr;
    MCSPI_ChObject          chObj[MCSPI_MAX_NUM_CHANNELS];
    /*
     * State variables
     */
    uint32_t                isOpen;
    void                   *transferSem;
    SemaphoreP_Object       transferSemObj;
    void                   *hwiHandle;
    HwiP_Object             hwiObj;
    MCSPI_Transaction      *transaction;
    void                   *mcspiDmaHandle;
    MCSPILLD_Object        mcspiLldObject;
    MCSPILLD_Handle        mcspiLldHandle;
    MCSPILLD_InitObject    mcspiLldInitObj;
 /*  MCSPI driver object for LLD */
} MCSPI_Object;
 
typedef struct
{
    const MCSPI_Attrs      *attrs;
    MCSPI_Object           *object;
} MCSPI_Config;
 
extern MCSPI_Config         gMcspiConfig[];
extern uint32_t             gMcspiConfigNum;
 
/* ========================================================================== */
/*                          Function Declarations                             */
/* ========================================================================== */
 
void MCSPI_init(void);
 
void MCSPI_deinit(void);
 
MCSPI_Handle MCSPI_open(uint32_t index, const MCSPI_OpenParams *openPrms);
 
void MCSPI_close(MCSPI_Handle handle);
 
MCSPI_Handle MCSPI_getHandle(uint32_t index);
 
int32_t MCSPI_chConfig(MCSPI_Handle handle, const MCSPI_ChConfig *chCfg);
 
int32_t MCSPI_dmaChConfig(MCSPI_Handle handle,
                          const MCSPI_ChConfig *chCfg,
                          const MCSPI_DmaChConfig *dmaChCfg);
 
int32_t MCSPI_transfer(MCSPI_Handle handle, MCSPI_Transaction *transaction);
 
int32_t MCSPI_transferCancel(MCSPI_Handle handle);
 
static inline void MCSPI_OpenParams_init(MCSPI_OpenParams *openPrms);
 
static inline void MCSPI_ChConfig_init(MCSPI_ChConfig *chConfig);
 
static inline void MCSPI_Transaction_init(MCSPI_Transaction *trans);
 
int32_t MCSPI_reConfigFifo(MCSPI_Handle handle, uint32_t chNum, uint32_t numWordsRxTx);
 
/* ========================================================================== */
/*                       Static Function Definitions                          */
/* ========================================================================== */
 
static inline void MCSPI_OpenParams_init(MCSPI_OpenParams *openPrms)
{
    if(openPrms != NULL)
    {
        openPrms->transferMode        = MCSPI_TRANSFER_MODE_BLOCKING;
        openPrms->transferCallbackFxn = NULL;
        openPrms->msMode              = MCSPI_MS_MODE_CONTROLLER;
        openPrms->transferTimeout     = SystemP_WAIT_FOREVER;
    }
}
 
static inline void MCSPI_ChConfig_init(MCSPI_ChConfig *chConfig)
{
    if(chConfig != NULL)
    {
        chConfig->chNum             = MCSPI_CHANNEL_0;
        chConfig->frameFormat       = MCSPI_FF_POL0_PHA0;
        chConfig->bitRate           = 1000000U;
        chConfig->csPolarity        = MCSPI_CS_POL_LOW;
        chConfig->trMode            = MCSPI_TR_MODE_TX_RX;
        chConfig->inputSelect       = MCSPI_IS_D1;
        chConfig->dpe0              = MCSPI_DPE_ENABLE;
        chConfig->dpe1              = MCSPI_DPE_DISABLE;
        chConfig->slvCsSelect       = MCSPI_SLV_CS_SELECT_0;
        chConfig->startBitEnable    = FALSE;
        chConfig->startBitPolarity  = MCSPI_SB_POL_LOW;
        chConfig->csIdleTime        = MCSPI_TCS0_0_CLK;
        chConfig->defaultTxData     = 0x00000000U;
        chConfig->txFifoTrigLvl     = 16;
        chConfig->rxFifoTrigLvl     = 16;
    }
}
 
static inline void MCSPI_Transaction_init(MCSPI_Transaction *trans)
{
    if(trans != NULL)
    {
        trans->channel   = 0U;
        trans->csDisable = TRUE;
        trans->dataSize  = 8U;
        trans->count     = 0U;
        trans->txBuf     = NULL;
        trans->rxBuf     = NULL;
        trans->args      = NULL;
        trans->status    = MCSPI_TRANSFER_COMPLETED;
    }
}
 
/* ========================================================================== */
/*                       Advanced Macros & Typedefs                           */
/* ========================================================================== */
 
 
/* ========================================================================== */
/*                       Advanced Function Declarations                       */
/* ========================================================================== */
uint32_t MCSPI_getBaseAddr(MCSPI_Handle handle);
 
/* ========================================================================== */
/*                       Advanced Function Definitions                        */
/* ========================================================================== */
 
/* ========================================================================== */
/*                  Internal/Private Structure Declarations                   */
/* ========================================================================== */
 
#ifdef __cplusplus
}
#endif
 
#endif /* #ifndef MCSPI_H_ */