ddi.h

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/******************************************************************************
*  Filename:       ddi.h
*  Revised:        2016-05-09 12:05:02 +0200 (Mon, 09 May 2016)
*  Revision:       46315
*
*  Description:    Defines and prototypes for the DDI master interface.
*
*  Copyright (c) 2015 - 2016, Texas Instruments Incorporated
*  All rights reserved.
*
*  Redistribution and use in source and binary forms, with or without
*  modification, are permitted provided that the following conditions are met:
*
*  1) Redistributions of source code must retain the above copyright notice,
*     this list of conditions and the following disclaimer.
*
*  2) 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.
*
*  3) Neither the name of the ORGANIZATION 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 HOLDER OR CONTRIBUTORS BE
*  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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*  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
*  POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************/

//*****************************************************************************
//
//
//*****************************************************************************

#ifndef __DDI_H__
#define __DDI_H__

//*****************************************************************************
//
// If building with a C++ compiler, make all of the definitions in this header
// have a C binding.
//
//*****************************************************************************
#ifdef __cplusplus
extern "C"
{
#endif

#include <stdbool.h>
#include <stdint.h>
#include <inc/hw_types.h>
#include <inc/hw_memmap.h>
#include <inc/hw_ddi.h>
#include <inc/hw_aux_smph.h>
#include <driverlib/debug.h>
#include <driverlib/cpu.h>

//*****************************************************************************
//
// Support for DriverLib in ROM:
// This section renames all functions that are not "static inline", so that
// calling these functions will default to implementation in flash. At the end
// of this file a second renaming will change the defaults to implementation in
// ROM for available functions.
//
// To force use of the implementation in flash, e.g. for debugging:
// - Globally: Define DRIVERLIB_NOROM at project level
// - Per function: Use prefix "NOROM_" when calling the function
//
//*****************************************************************************
#if !defined(DOXYGEN)
    #define DDI32RegWrite                   NOROM_DDI32RegWrite
    #define DDI16BitWrite                   NOROM_DDI16BitWrite
    #define DDI16BitfieldWrite              NOROM_DDI16BitfieldWrite
    #define DDI16BitRead                    NOROM_DDI16BitRead
    #define DDI16BitfieldRead               NOROM_DDI16BitfieldRead
#endif

//*****************************************************************************
//
// Number of register in the DDI slave
//
//*****************************************************************************
#define DDI_SLAVE_REGS          64


//*****************************************************************************
//
// Defines that is used to control the ADI slave and master
//
//*****************************************************************************
#define DDI_PROTECT         0x00000080
#define DDI_ACK             0x00000001
#define DDI_SYNC            0x00000000

//*****************************************************************************
//
// API Functions and prototypes
//
//*****************************************************************************


//*****************************************************************************
//
// Helper functions
//
//*****************************************************************************

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void
AuxAdiDdiSafeWrite(uint32_t nAddr, uint32_t nData, uint32_t nSize)
{
    // Disable interrupts and remember whether to re-enable
    bool bIrqEnabled = !CPUcpsid();
    // Acquire semaphore for accessing ADI/DDI in AUX, perform access, release semaphore
    while (!HWREG(AUX_SMPH_BASE + AUX_SMPH_O_SMPH0));
    switch (nSize) {
    case 1:             HWREGB(nAddr) = (uint8_t)nData; break;
    case 2:             HWREGH(nAddr) = (uint16_t)nData; break;
    case 4: default:    HWREG(nAddr)  = nData; break;
    }
    HWREG(AUX_SMPH_BASE + AUX_SMPH_O_SMPH0) = 1;
    // Restore interrupt enable
    if (bIrqEnabled) {
        CPUcpsie();
    }
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE uint32_t
AuxAdiDdiSafeRead(uint32_t nAddr, uint32_t nSize)
{
    uint32_t nRet;
    // Disable interrupts and remember whether to re-enable
    bool bIrqEnabled = !CPUcpsid();
    // Acquire semaphore for accessing ADI/DDI in AUX, perform access, release semaphore
    while (!HWREG(AUX_SMPH_BASE + AUX_SMPH_O_SMPH0));
    switch (nSize) {
    case 1:             nRet = HWREGB(nAddr); break;
    case 2:             nRet = HWREGH(nAddr); break;
    case 4: default:    nRet = HWREG(nAddr); break;
    }
    HWREG(AUX_SMPH_BASE + AUX_SMPH_O_SMPH0) = 1;
    // Restore interrupt enable
    if (bIrqEnabled) {
        CPUcpsie();
    }
    return nRet;
}

#ifdef DRIVERLIB_DEBUG
//*****************************************************************************
//
//
//*****************************************************************************
static bool
DDIBaseValid(uint32_t ui32Base)
{
    return(ui32Base == AUX_DDI0_OSC_BASE);
}
#endif


//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE uint32_t
DDI32RegRead(uint32_t ui32Base, uint32_t ui32Reg)
{
    //
    // Check the arguments.
    //
    ASSERT(DDIBaseValid(ui32Base));
    ASSERT(ui32Reg < DDI_SLAVE_REGS);

    //
    // Read the register and return the value.
    //
    return AuxAdiDdiSafeRead(ui32Base + ui32Reg, 4);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void
DDI32BitsSet(uint32_t ui32Base, uint32_t ui32Reg, uint32_t ui32Val)
{
    uint32_t ui32RegOffset;

    //
    // Check the arguments.
    //
    ASSERT(DDIBaseValid(ui32Base));
    ASSERT(ui32Reg < DDI_SLAVE_REGS);

    //
    // Get the correct address of the first register used for setting bits
    // in the DDI slave.
    //
    ui32RegOffset = DDI_O_SET;

    //
    // Set the selected bits.
    //
    AuxAdiDdiSafeWrite(ui32Base + ui32RegOffset + ui32Reg, ui32Val, 4);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void
DDI32BitsClear(uint32_t ui32Base, uint32_t ui32Reg,
               uint32_t ui32Val)
{
    uint32_t ui32RegOffset;

    //
    // Check the arguments.
    //
    ASSERT(DDIBaseValid(ui32Base));
    ASSERT(ui32Reg < DDI_SLAVE_REGS);

    //
    // Get the correct address of the first register used for setting bits
    // in the DDI slave.
    //
    ui32RegOffset = DDI_O_CLR;

    //
    // Clear the selected bits.
    //
    AuxAdiDdiSafeWrite(ui32Base + ui32RegOffset + ui32Reg, ui32Val, 4);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void
DDI8SetValBit(uint32_t ui32Base, uint32_t ui32Reg, uint32_t ui32Byte,
              uint16_t ui16Mask, uint16_t ui16Val)
{
    uint32_t ui32RegOffset;

    //
    // Check the arguments.
    //
    ASSERT(DDIBaseValid(ui32Base));
    ASSERT(ui32Reg < DDI_SLAVE_REGS);
    ASSERT(!(ui16Val & 0xFF00));
    ASSERT(!(ui16Mask & 0xFF00));

    //
    // Get the correct address of the first register used for setting bits
    // in the DDI slave.
    //
    ui32RegOffset = DDI_O_MASK8B + (ui32Reg << 1) + (ui32Byte << 1);

    //
    // Set the selected bits.
    //
    AuxAdiDdiSafeWrite(ui32Base + ui32RegOffset, (ui16Mask << 8) | ui16Val, 2);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void
DDI16SetValBit(uint32_t ui32Base, uint32_t ui32Reg, bool bWriteHigh,
               uint32_t ui32Mask, uint32_t ui32Val)
{
    uint32_t ui32RegOffset;

    //
    // Check the arguments.
    //
    ASSERT(DDIBaseValid(ui32Base));
    ASSERT(ui32Reg < DDI_SLAVE_REGS);
    ASSERT(!(ui32Val & 0xFFFF0000));
    ASSERT(!(ui32Mask & 0xFFFF0000));

    //
    // Get the correct address of the first register used for setting bits
    // in the DDI slave.
    //
    ui32RegOffset = DDI_O_MASK16B + (ui32Reg << 1) + (bWriteHigh ? 4 : 0);

    //
    // Set the selected bits.
    //
    AuxAdiDdiSafeWrite(ui32Base + ui32RegOffset, (ui32Mask << 16) | ui32Val, 4);
}

//*****************************************************************************
//
//
//*****************************************************************************
extern void DDI32RegWrite(uint32_t ui32Base, uint32_t ui32Reg, uint32_t ui32Val);

//*****************************************************************************
//
//
//*****************************************************************************
extern void DDI16BitWrite(uint32_t ui32Base, uint32_t ui32Reg,
                          uint32_t ui32Mask, uint32_t ui32WrData);


//*****************************************************************************
//
//
//*****************************************************************************
extern void DDI16BitfieldWrite(uint32_t ui32Base, uint32_t ui32Reg,
                               uint32_t ui32Mask, uint32_t ui32Shift,
                               uint16_t ui32Data);

//*****************************************************************************
//
//
//*****************************************************************************
extern uint16_t DDI16BitRead(uint32_t ui32Base, uint32_t ui32Reg,
                             uint32_t ui32Mask);

//*****************************************************************************
//
//
//*****************************************************************************
extern uint16_t DDI16BitfieldRead(uint32_t ui32Base, uint32_t ui32Reg,
                                  uint32_t ui32Mask, uint32_t ui32Shift);

//*****************************************************************************
//
// Support for DriverLib in ROM:
// Redirect to implementation in ROM when available.
//
//*****************************************************************************
#if !defined(DRIVERLIB_NOROM) && !defined(DOXYGEN)
    #include <driverlib/rom.h>
    #ifdef ROM_DDI32RegWrite
        #undef  DDI32RegWrite
        #define DDI32RegWrite                   ROM_DDI32RegWrite
    #endif
    #ifdef ROM_DDI16BitWrite
        #undef  DDI16BitWrite
        #define DDI16BitWrite                   ROM_DDI16BitWrite
    #endif
    #ifdef ROM_DDI16BitfieldWrite
        #undef  DDI16BitfieldWrite
        #define DDI16BitfieldWrite              ROM_DDI16BitfieldWrite
    #endif
    #ifdef ROM_DDI16BitRead
        #undef  DDI16BitRead
        #define DDI16BitRead                    ROM_DDI16BitRead
    #endif
    #ifdef ROM_DDI16BitfieldRead
        #undef  DDI16BitfieldRead
        #define DDI16BitfieldRead               ROM_DDI16BitfieldRead
    #endif
#endif

//*****************************************************************************
//
// Mark the end of the C bindings section for C++ compilers.
//
//*****************************************************************************
#ifdef __cplusplus
}
#endif

#endif // __DDI_H__

//*****************************************************************************
//
//
//*****************************************************************************