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

  (c) SYSTEC electronic GmbH, D-07973 Greiz, August-Bebel-Str. 29
      www.systec-electronic.com

  Project:      openPOWERLINK

  Description:  source file for SDO/Asnd-Protocolabstractionlayer module

  License:

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:

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       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
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    3. Neither the name of SYSTEC electronic GmbH nor the names of its
       contributors may be used to endorse or promote products derived
       from this software without prior written permission. For written
       permission, please contact info@systec-electronic.com.

    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
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    COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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    POSSIBILITY OF SUCH DAMAGE.

    Severability Clause:

        If a provision of this License is or becomes illegal, invalid or
        unenforceable in any jurisdiction, that shall not affect:
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           provision of this License; or
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  -------------------------------------------------------------------------

                $RCSfile: EplSdoAsndu.c,v $

                $Author: D.Krueger $

                $Revision: 1.7 $  $Date: 2008/10/17 15:32:32 $

                $State: Exp $

                Build Environment:
                    GCC V3.4

  -------------------------------------------------------------------------

  Revision History:

  2006/07/07 k.t.:   start of the implementation

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

#include "user/EplSdoAsndu.h"
#include "user/EplDlluCal.h"

#if(((EPL_MODULE_INTEGRATION) & (EPL_MODULE_SDO_ASND)) != 0)

/***************************************************************************/
/*                                                                         */
/*                                                                         */
/*          G L O B A L   D E F I N I T I O N S                            */
/*                                                                         */
/*                                                                         */
/***************************************************************************/

//---------------------------------------------------------------------------
// const defines
//---------------------------------------------------------------------------

#ifndef EPL_SDO_MAX_CONNECTION_ASND
#define EPL_SDO_MAX_CONNECTION_ASND 5
#endif

//---------------------------------------------------------------------------
// local types
//---------------------------------------------------------------------------

// instance table
typedef struct {
	unsigned int m_auiSdoAsndConnection[EPL_SDO_MAX_CONNECTION_ASND];
	tEplSequLayerReceiveCb m_fpSdoAsySeqCb;

} tEplSdoAsndInstance;

//---------------------------------------------------------------------------
// modul globale vars
//---------------------------------------------------------------------------

static tEplSdoAsndInstance SdoAsndInstance_g;

//---------------------------------------------------------------------------
// local function prototypes
//---------------------------------------------------------------------------

tEplKernel PUBLIC EplSdoAsnduCb(tEplFrameInfo * pFrameInfo_p);

/***************************************************************************/
/*                                                                         */
/*                                                                         */
/*          C L A S S  <EPL SDO-Asnd Protocolabstraction layer>            */
/*                                                                         */
/*                                                                         */
/***************************************************************************/
//
// Description: EPL SDO-Asnd Protocolabstraction layer
//
//
/***************************************************************************/

//=========================================================================//
//                                                                         //
//          P U B L I C   F U N C T I O N S                                //
//                                                                         //
//=========================================================================//

//---------------------------------------------------------------------------
//
// Function:    EplSdoAsnduInit
//
// Description: init first instance of the module
//
//
//
// Parameters:  pReceiveCb_p    =   functionpointer to Sdo-Sequence layer
//                                  callback-function
//
//
// Returns:     tEplKernel  = Errorcode
//
//
// State:
//
//---------------------------------------------------------------------------
tEplKernel PUBLIC EplSdoAsnduInit(tEplSequLayerReceiveCb fpReceiveCb_p)
{
	tEplKernel Ret;

	Ret = EplSdoAsnduAddInstance(fpReceiveCb_p);

	return Ret;
}

//---------------------------------------------------------------------------
//
// Function:    EplSdoAsnduAddInstance
//
// Description: init additional instance of the module
//
//
//
// Parameters:  pReceiveCb_p    =   functionpointer to Sdo-Sequence layer
//                                  callback-function
//
//
// Returns:     tEplKernel  = Errorcode
//
//
// State:
//
//---------------------------------------------------------------------------
tEplKernel PUBLIC EplSdoAsnduAddInstance(tEplSequLayerReceiveCb fpReceiveCb_p)
{
	tEplKernel Ret;

	Ret = kEplSuccessful;

	// init control structure
	EPL_MEMSET(&SdoAsndInstance_g, 0x00, sizeof(SdoAsndInstance_g));

	// save pointer to callback-function
	if (fpReceiveCb_p != NULL) {
		SdoAsndInstance_g.m_fpSdoAsySeqCb = fpReceiveCb_p;
	} else {
		Ret = kEplSdoUdpMissCb;
	}

#if(((EPL_MODULE_INTEGRATION) & (EPL_MODULE_DLLU)) != 0)
	Ret = EplDlluCalRegAsndService(kEplDllAsndSdo,
				       EplSdoAsnduCb, kEplDllAsndFilterLocal);
#endif

	return Ret;
}

//---------------------------------------------------------------------------
//
// Function:    EplSdoAsnduDelInstance
//
// Description: del instance of the module
//              del socket and del Listen-Thread
//
//
//
// Parameters:
//
//
// Returns:     tEplKernel  = Errorcode
//
//
// State:
//
//---------------------------------------------------------------------------
tEplKernel PUBLIC EplSdoAsnduDelInstance()
{
	tEplKernel Ret;

	Ret = kEplSuccessful;

#if(((EPL_MODULE_INTEGRATION) & (EPL_MODULE_DLLU)) != 0)
	// deregister callback function from DLL
	Ret = EplDlluCalRegAsndService(kEplDllAsndSdo,
				       NULL, kEplDllAsndFilterNone);
#endif

	return Ret;
}

//---------------------------------------------------------------------------
//
// Function:    EplSdoAsnduInitCon
//
// Description: init a new connect
//
//
//
// Parameters:  pSdoConHandle_p = pointer for the new connection handle
//              uiTargetNodeId_p = NodeId of the target node
//
//
// Returns:     tEplKernel  = Errorcode
//
//
// State:
//
//---------------------------------------------------------------------------
tEplKernel PUBLIC EplSdoAsnduInitCon(tEplSdoConHdl * pSdoConHandle_p,
				     unsigned int uiTargetNodeId_p)
{
	tEplKernel Ret;
	unsigned int uiCount;
	unsigned int uiFreeCon;
	unsigned int *puiConnection;

	Ret = kEplSuccessful;

	if ((uiTargetNodeId_p == EPL_C_ADR_INVALID)
	    || (uiTargetNodeId_p >= EPL_C_ADR_BROADCAST)) {
		Ret = kEplSdoAsndInvalidNodeId;
		goto Exit;
	}
	// get free entry in control structure
	uiCount = 0;
	uiFreeCon = EPL_SDO_MAX_CONNECTION_ASND;
	puiConnection = &SdoAsndInstance_g.m_auiSdoAsndConnection[0];
	while (uiCount < EPL_SDO_MAX_CONNECTION_ASND) {
		if (*puiConnection == uiTargetNodeId_p) {	// existing connection to target node found
			// save handle for higher layer
			*pSdoConHandle_p = (uiCount | EPL_SDO_ASND_HANDLE);

			goto Exit;
		} else if (*puiConnection == 0) {	// free entry-> save target nodeId
			uiFreeCon = uiCount;
		}
		uiCount++;
		puiConnection++;
	}

	if (uiFreeCon == EPL_SDO_MAX_CONNECTION_ASND) {
		// no free connection
		Ret = kEplSdoAsndNoFreeHandle;
	} else {
		puiConnection =
		    &SdoAsndInstance_g.m_auiSdoAsndConnection[uiFreeCon];
		*puiConnection = uiTargetNodeId_p;
		// save handle for higher layer
		*pSdoConHandle_p = (uiFreeCon | EPL_SDO_ASND_HANDLE);

		goto Exit;
	}

      Exit:
	return Ret;
}

//---------------------------------------------------------------------------
//
// Function:    EplSdoAsnduSendData
//
// Description: send data using exisiting connection
//
//
//
// Parameters:  SdoConHandle_p  = connection handle
//              pSrcData_p      = pointer to data
//              dwDataSize_p    = number of databyte
//                                  -> without asnd-header!!!
//
// Returns:     tEplKernel  = Errorcode
//
//
// State:
//
//---------------------------------------------------------------------------
tEplKernel PUBLIC EplSdoAsnduSendData(tEplSdoConHdl SdoConHandle_p,
				      tEplFrame * pSrcData_p,
				      DWORD dwDataSize_p)
{
	tEplKernel Ret;
	unsigned int uiArray;
	tEplFrameInfo FrameInfo;

	Ret = kEplSuccessful;

	uiArray = (SdoConHandle_p & ~EPL_SDO_ASY_HANDLE_MASK);

	if (uiArray > EPL_SDO_MAX_CONNECTION_ASND) {
		Ret = kEplSdoAsndInvalidHandle;
		goto Exit;
	}
	// fillout Asnd header
	// own node id not needed -> filled by DLL

	// set message type
	AmiSetByteToLe(&pSrcData_p->m_le_bMessageType, (BYTE) kEplMsgTypeAsnd);	// ASnd == 0x06
	// target node id
	AmiSetByteToLe(&pSrcData_p->m_le_bDstNodeId,
		       (BYTE) SdoAsndInstance_g.
		       m_auiSdoAsndConnection[uiArray]);
	// set source-nodeid (filled by DLL 0)
	AmiSetByteToLe(&pSrcData_p->m_le_bSrcNodeId, 0x00);

	// calc size
	dwDataSize_p += EPL_ASND_HEADER_SIZE;

	// send function of DLL
	FrameInfo.m_uiFrameSize = dwDataSize_p;
	FrameInfo.m_pFrame = pSrcData_p;
	EPL_MEMSET(&FrameInfo.m_NetTime, 0x00, sizeof(tEplNetTime));
#if(((EPL_MODULE_INTEGRATION) & (EPL_MODULE_DLLU)) != 0)
	Ret = EplDlluCalAsyncSend(&FrameInfo, kEplDllAsyncReqPrioGeneric);
#endif

      Exit:
	return Ret;

}

//---------------------------------------------------------------------------
//
// Function:    EplSdoAsnduDelCon
//
// Description: delete connection from intern structure
//
//
//
// Parameters:  SdoConHandle_p  = connection handle
//
// Returns:     tEplKernel  = Errorcode
//
//
// State:
//
//---------------------------------------------------------------------------
tEplKernel PUBLIC EplSdoAsnduDelCon(tEplSdoConHdl SdoConHandle_p)
{
	tEplKernel Ret;
	unsigned int uiArray;

	Ret = kEplSuccessful;

	uiArray = (SdoConHandle_p & ~EPL_SDO_ASY_HANDLE_MASK);
	// check parameter
	if (uiArray > EPL_SDO_MAX_CONNECTION_ASND) {
		Ret = kEplSdoAsndInvalidHandle;
		goto Exit;
	}
	// set target nodeId to 0
	SdoAsndInstance_g.m_auiSdoAsndConnection[uiArray] = 0;

      Exit:
	return Ret;
}

//=========================================================================//
//                                                                         //
//          P R I V A T E   F U N C T I O N S                              //
//                                                                         //
//=========================================================================//

//---------------------------------------------------------------------------
//
// Function:    EplSdoAsnduCb
//
// Description: callback function for SDO ASnd frames
//
//
//
// Parameters:      pFrameInfo_p = Frame with SDO payload
//
//
// Returns:         tEplKernel = errorcode
//
//
// State:
//
//---------------------------------------------------------------------------
tEplKernel PUBLIC EplSdoAsnduCb(tEplFrameInfo * pFrameInfo_p)
{
	tEplKernel Ret = kEplSuccessful;
	unsigned int uiCount;
	unsigned int *puiConnection;
	unsigned int uiNodeId;
	unsigned int uiFreeEntry = 0xFFFF;
	tEplSdoConHdl SdoConHdl;
	tEplFrame *pFrame;

	pFrame = pFrameInfo_p->m_pFrame;

	uiNodeId = AmiGetByteFromLe(&pFrame->m_le_bSrcNodeId);

	// search corresponding entry in control structure
	uiCount = 0;
	puiConnection = &SdoAsndInstance_g.m_auiSdoAsndConnection[0];
	while (uiCount < EPL_SDO_MAX_CONNECTION_ASND) {
		if (uiNodeId == *puiConnection) {
			break;
		} else if ((*puiConnection == 0)
			   && (uiFreeEntry == 0xFFFF)) {	// free entry
			uiFreeEntry = uiCount;
		}
		uiCount++;
		puiConnection++;
	}

	if (uiCount == EPL_SDO_MAX_CONNECTION_ASND) {
		if (uiFreeEntry != 0xFFFF) {
			puiConnection =
			    &SdoAsndInstance_g.
			    m_auiSdoAsndConnection[uiFreeEntry];
			*puiConnection = uiNodeId;
			uiCount = uiFreeEntry;
		} else {
			EPL_DBGLVL_SDO_TRACE0
			    ("EplSdoAsnduCb(): no free handle\n");
			goto Exit;
		}
	}
//    if (uiNodeId == *puiConnection)
	{			// entry found or created
		SdoConHdl = (uiCount | EPL_SDO_ASND_HANDLE);

		SdoAsndInstance_g.m_fpSdoAsySeqCb(SdoConHdl,
						  &pFrame->m_Data.m_Asnd.
						  m_Payload.m_SdoSequenceFrame,
						  (pFrameInfo_p->m_uiFrameSize -
						   18));
	}

      Exit:
	return Ret;

}

#endif // end of #if(((EPL_MODULE_INTEGRATION) & (EPL_MODULE_SDO_ASND)) != 0)
// EOF