/*
 * Copyright (C) 2010 NXP Semiconductors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * \file  phFriNfc_Llcp.h
 * \brief NFC LLCP core
 *
 * Project: NFC-FRI
 *
 */

#ifndef PHFRINFC_LLCP_H
#define PHFRINFC_LLCP_H

/*include files*/
#include <phNfcTypes.h>
#include <phNfcLlcpTypes.h>
#include <phNfcStatus.h>
#include <phFriNfc.h>

#include <phFriNfc_LlcpMac.h>

/** 
 * \name NFC Forum Logical Link Control Protocol
 *
 * File: \ref phFriNfc_Llcp.h
 *
 */


/** \defgroup grp_fri_nfc_llcp NFC Forum Logical Link Control Protocol Component
 *
 *  TODO
 *
 */

/*=========== DEBUG MACROS ===========*/

/* LLCP TRACE Macros */
#if defined(LLCP_TRACE)
#include <phOsalNfc.h>
#include <stdio.h>
extern char phOsalNfc_DbgTraceBuffer[];
#define LLCP_MAX_TRACE_BUFFER   150
#define LLCP_PRINT( str )  phOsalNfc_DbgString(str)
#define LLCP_DEBUG(str, arg) \
   {                                                                    \
      snprintf(phOsalNfc_DbgTraceBuffer,LLCP_MAX_TRACE_BUFFER,str,arg); \
      phOsalNfc_DbgString(phOsalNfc_DbgTraceBuffer);                    \
   }
#define LLCP_PRINT_BUFFER(msg,buf,len) \
   {                                                                             \
      snprintf(phOsalNfc_DbgTraceBuffer,LLCP_MAX_TRACE_BUFFER,"\n\t %s:",msg);   \
      phOsalNfc_DbgString(phOsalNfc_DbgTraceBuffer);                             \
      phOsalNfc_DbgTrace(buf,len);                                               \
      phOsalNfc_DbgString("\r");                                                 \
   }
#else
#define LLCP_PRINT( str ) 
#define LLCP_DEBUG(str, arg) 
#define LLCP_PRINT_BUFFER(msg,buf,len)
#endif


/*=========== CONSTANTS ===========*/

/**
 *  \name LLCP local protocol version.
 *
 */
 /*@{*/
#define PHFRINFC_LLCP_VERSION_MAJOR   0x01  /**< Major number of local LLCP version.*/
#define PHFRINFC_LLCP_VERSION_MINOR   0x00  /**< Minor number of local LLCP version.*/
#define PHFRINFC_LLCP_VERSION         ((PHFRINFC_LLCP_VERSION_MAJOR << 4) | PHFRINFC_LLCP_VERSION_MINOR) /**< Local LLCP version.*/
/*@}*/

/**
 *  \name LLCP packet types.
 *
 */
 /*@{*/
#define PHFRINFC_LLCP_PTYPE_SYMM       0x00 /**< Symmetry.*/
#define PHFRINFC_LLCP_PTYPE_PAX        0x01 /**< PArameter Exchange.*/
#define PHFRINFC_LLCP_PTYPE_AGF        0x02 /**< AGgregated Frame.*/
#define PHFRINFC_LLCP_PTYPE_UI         0x03 /**< Unnumbered Information.*/
#define PHFRINFC_LLCP_PTYPE_CONNECT    0x04 /**< Connect.*/
#define PHFRINFC_LLCP_PTYPE_DISC       0x05 /**< Didconnect.*/
#define PHFRINFC_LLCP_PTYPE_CC         0x06 /**< Connection Complete.*/
#define PHFRINFC_LLCP_PTYPE_DM         0x07 /**< Disconnected Mode.*/
#define PHFRINFC_LLCP_PTYPE_FRMR       0x08 /**< FRaMe Reject.*/
#define PHFRINFC_LLCP_PTYPE_RESERVED1  0x09 /**< Reserved.*/
#define PHFRINFC_LLCP_PTYPE_RESERVED2  0x0A /**< Reserved.*/
#define PHFRINFC_LLCP_PTYPE_RESERVED3  0x0B /**< Reserved.*/
#define PHFRINFC_LLCP_PTYPE_I          0x0C /**< Information.*/
#define PHFRINFC_LLCP_PTYPE_RR         0x0D /**< Receive Ready.*/
#define PHFRINFC_LLCP_PTYPE_RNR        0x0E /**< Receive Not Ready.*/
#define PHFRINFC_LLCP_PTYPE_RESERVED4  0x0F /**< Reserved.*/
/*@}*/

/**
 *  \name LLCP well-known SAPs.
 *
 */
 /*@{*/
#define PHFRINFC_LLCP_SAP_LINK                     0x00 /**< Link SAP.*/
#define PHFRINFC_LLCP_SAP_SDP                      0x01 /**< Service Discovery Protocol SAP.*/
#define PHFRINFC_LLCP_SAP_SDP_ADVERTISED_FIRST     0x10 /**< First SAP number from SDP-avertised SAP range.*/
#define PHFRINFC_LLCP_SAP_SDP_UNADVERTISED_FIRST   0x20 /**< First SAP number from SDP-unavertised SAP range.*/
#define PHFRINFC_LLCP_SAP_NUMBER                   0x40 /**< Number of possible SAP values (also first invalid value).*/
#define PHFRINFC_LLCP_SAP_DEFAULT                  0xFF /**< Default number when a socket is created or reset */
/*@}*/

/**
 *  \name Length value for DM opCode
 *
 */
 /*@{*/
#define PHFRINFC_LLCP_DM_LENGTH                    0x01 /**< Length value for DM opCode */
/*@}*/


/**
 * \internal 
 * \name Masks used with parameters value.
 *
 */
/*@{*/
#define PHFRINFC_LLCP_TLV_MIUX_MASK                 0x07FF   /**< \internal Mask to apply to MIUX TLV Value.*/
#define PHFRINFC_LLCP_TLV_WKS_MASK                  0x0001   /**< \internal Minimal bits to be set in WKS TLV Value.*/
#define PHFRINFC_LLCP_TLV_RW_MASK                   0x0F     /**< \internal Mask to apply to RW TLV Value.*/
#define PHFRINFC_LLCP_TLV_OPT_MASK                  0x03     /**< \internal Mask to apply to OPT TLV Value.*/
/*@}*/

/**
 * \internal 
 * \name Type codes for parameters in TLV.
 *
 */
/*@{*/
#define PHFRINFC_LLCP_TLV_TYPE_VERSION               0x01   /**< \internal VERSION parameter Type code.*/
#define PHFRINFC_LLCP_TLV_TYPE_MIUX                  0x02   /**< \internal MIUX parameter Type code.*/
#define PHFRINFC_LLCP_TLV_TYPE_WKS                   0x03   /**< \internal WKS parameter Type code.*/
#define PHFRINFC_LLCP_TLV_TYPE_LTO                   0x04   /**< \internal LTO parameter Type code.*/
#define PHFRINFC_LLCP_TLV_TYPE_RW                    0x05   /**< \internal RW parameter Type code.*/
#define PHFRINFC_LLCP_TLV_TYPE_SN                    0x06   /**< \internal SN parameter Type code.*/
#define PHFRINFC_LLCP_TLV_TYPE_OPT                   0x07   /**< \internal OPT parameter Type code.*/
/*@}*/

/**
 * \internal 
 * \name Fixed Value length for parameters in TLV.
 *
 */
/*@{*/
#define PHFRINFC_LLCP_TLV_LENGTH_HEADER              2   /**< \internal Fixed length of Type and Length fields in TLV.*/
#define PHFRINFC_LLCP_TLV_LENGTH_VERSION             1   /**< \internal Fixed length of VERSION parameter Value.*/
#define PHFRINFC_LLCP_TLV_LENGTH_MIUX                2   /**< \internal Fixed length of MIUX parameter Value.*/
#define PHFRINFC_LLCP_TLV_LENGTH_WKS                 2   /**< \internal Fixed length of WKS parameter Value.*/
#define PHFRINFC_LLCP_TLV_LENGTH_LTO                 1   /**< \internal Fixed length of LTO parameter Value.*/
#define PHFRINFC_LLCP_TLV_LENGTH_RW                  1   /**< \internal Fixed length of RW parameter Value.*/
#define PHFRINFC_LLCP_TLV_LENGTH_OPT                 1   /**< \internal Fixed length of OPT parameter Value.*/
/*@}*/

/**
 *  \name LLCP packet field sizes.
 *
 */
 /*@{*/
#define PHFRINFC_LLCP_PACKET_HEADER_SIZE     2 /**< Size of the general packet header (DSAP+PTYPE+SSAP).*/
#define PHFRINFC_LLCP_PACKET_SEQUENCE_SIZE   1 /**< Size of the sequence field, if present.*/
#define PHFRINFC_LLCP_PACKET_MAX_SIZE        (PHFRINFC_LLCP_PACKET_HEADER_SIZE + \
                                             PHFRINFC_LLCP_PACKET_SEQUENCE_SIZE + \
                                             PHFRINFC_LLCP_MIU_DEFAULT + \
                                             PHFRINFC_LLCP_TLV_MIUX_MASK) /**< Maximum size of a packet */
/*@}*/

/*========== MACROS ===========*/

#define CHECK_SEND_RW(socket) ( (((socket)->socket_VS - (socket)->socket_VSA)  % 16) < (socket)->remoteRW )

/*========== ENUMERATES ===========*/

typedef phFriNfc_LlcpMac_ePeerType_t      phFriNfc_Llcp_eRole_t;

typedef phFriNfc_LlcpMac_eLinkStatus_t    phFriNfc_Llcp_eLinkStatus_t;

/*========== CALLBACKS ===========*/

typedef void (*phFriNfc_Llcp_Check_CB_t) (
   void                             *pContext,
   NFCSTATUS                        status
);

typedef void (*phFriNfc_Llcp_LinkStatus_CB_t) (
   void                             *pContext,
   phFriNfc_Llcp_eLinkStatus_t      eLinkStatus
);

typedef void (*phFriNfc_Llcp_Send_CB_t) (
   void                             *pContext,
   NFCSTATUS                        status
);

typedef void (*phFriNfc_Llcp_Recv_CB_t) (
   void                             *pContext,
   phNfc_sData_t                    *psData,
   NFCSTATUS                        status
);

/*========== STRUCTURES ===========*/

typedef struct phFriNfc_Llcp_sPacketHeader
{
   /**< The destination service access point*/
   unsigned   dsap : 6;

   /**< The packet type*/
   unsigned   ptype : 4;

   /**< The source service access point*/
   unsigned   ssap : 6;

} phFriNfc_Llcp_sPacketHeader_t;

typedef struct phFriNfc_Llcp_sPacketSequence
{
   /**< Sequence number for sending*/
   unsigned   ns : 4;

   /**< Sequence number for reception*/
   unsigned   nr : 4;

} phFriNfc_Llcp_sPacketSequence_t;

typedef struct phFriNfc_Llcp_sSendOperation
{
   /**< Sequence number for sending*/
   phFriNfc_Llcp_sPacketHeader_t    *psHeader;

   /**< Sequence number for sending*/
   phFriNfc_Llcp_sPacketSequence_t  *psSequence;

   /**< Sequence number for sending*/
   phNfc_sData_t                    *psInfo;

   /**< Sequence number for sending*/
   phFriNfc_Llcp_Send_CB_t          pfSend_CB;

   /**< Sequence number for sending*/
   void                             *pContext;

} phFriNfc_Llcp_sSendOperation_t;

typedef struct phFriNfc_Llcp_sRecvOperation
{
   /**< Sequence number for sending*/
   uint8_t                    nSap;

   /**< Sequence number for sending*/
   phNfc_sData_t              *psBuffer;

   /**< Sequence number for sending*/
   phFriNfc_Llcp_Recv_CB_t    pfRecv_CB;

   /**< Sequence number for sending*/
   void                       *pContext;

} phFriNfc_Llcp_sRecvOperation_t;

typedef struct phFriNfc_Llcp
{
   /**< The current state*/
   uint8_t                          state;

   /**< MAC mapping instance*/
   phFriNfc_LlcpMac_t               MAC;

   /**< Local LLC role*/
   phFriNfc_LlcpMac_eType_t         eRole;

   /**< Local link parameters*/
   phFriNfc_Llcp_sLinkParameters_t  sLocalParams;

   /**< Remote link parameters*/
   phFriNfc_Llcp_sLinkParameters_t  sRemoteParams;

   /**< Negociated protocol version (major number on MSB, minor on LSB)*/
   uint8_t                          version;

   /**< Internal reception buffer, its size may vary during time but not exceed nRxBufferSize*/
   phNfc_sData_t                   sRxBuffer;

   /**< Actual size of reception buffer*/
   uint16_t                        nRxBufferLength;

   /**< Internal emission buffer, its size may vary during time but not exceed nTxBufferSize*/
   phNfc_sData_t                   sTxBuffer;

   /**< Actual size of emission buffer*/
   uint16_t                        nTxBufferLength;

   /**< Callback function for link status notification*/
   phFriNfc_Llcp_LinkStatus_CB_t    pfLink_CB;

   /**< Callback context for link status notification*/
   void                             *pLinkContext;

   /**< Callback function for compliance checking*/
   phFriNfc_Llcp_Check_CB_t         pfChk_CB;

   /**< Callback context for compliance checking*/
   void                             *pChkContext;

   /**< Symmetry timer*/
   uint32_t                         hSymmTimer;

   /**< Control frames buffer*/
   uint8_t                          pCtrlTxBuffer[10];

   /**< Control frames buffer size*/
   uint8_t                          pCtrlTxBufferLength;

   /**< DISC packet send pending flag*/
   bool_t                           bDiscPendingFlag;

   /**< FRMR packet send pending flag*/
   bool_t                           bFrmrPendingFlag;

   /**< Header of pending FRMR packet*/
   phFriNfc_Llcp_sPacketHeader_t    sFrmrHeader;

   /**< Info field of pending FRMR packet*/
   uint8_t                          pFrmrInfo[4];

   /**< Send callback*/
   phFriNfc_Llcp_Send_CB_t          pfSendCB;

   /**< Send callback*/
   void                             *pSendContext;

   /**< Pending send header*/
   phFriNfc_Llcp_sPacketHeader_t    *psSendHeader;

   /**< Pending send sequence*/
   phFriNfc_Llcp_sPacketSequence_t  *psSendSequence;

   /**< Pending send info*/
   phNfc_sData_t                    *psSendInfo;

   /**< Receive callback*/
   phFriNfc_Llcp_Recv_CB_t          pfRecvCB;

   /**< Receive callback*/
   void                             *pRecvContext;

} phFriNfc_Llcp_t;

/*========== UNIONS ===========*/


/*========== FUNCTIONS ===========*/

/*!
 * \brief TODO
 */
NFCSTATUS phFriNfc_Llcp_EncodeLinkParams( phNfc_sData_t                   *psRawBuffer,
                                          phFriNfc_Llcp_sLinkParameters_t *psLinkParams,
                                          uint8_t                         nVersion );


/*!
 * \brief TODO
 */
NFCSTATUS phFriNfc_Llcp_Reset( phFriNfc_Llcp_t                 *Llcp,
                               void                            *LowerDevice,
                               phFriNfc_Llcp_sLinkParameters_t *psLinkParams,
                               void                            *pRxBuffer,
                               uint16_t                        nRxBufferLength,
                               void                            *pTxBuffer,
                               uint16_t                        nTxBufferLength,
                               phFriNfc_Llcp_LinkStatus_CB_t   pfLink_CB,
                               void                            *pContext );

/*!
 * \brief TODO
 */
NFCSTATUS phFriNfc_Llcp_ChkLlcp( phFriNfc_Llcp_t               *Llcp,
                                 phHal_sRemoteDevInformation_t *psRemoteDevInfo,
                                 phFriNfc_Llcp_Check_CB_t      pfCheck_CB,
                                 void                          *pContext );

/*!
 * \brief TODO
 */
NFCSTATUS phFriNfc_Llcp_Activate( phFriNfc_Llcp_t  *Llcp );

/*!
 * \brief TODO
 */
NFCSTATUS phFriNfc_Llcp_Deactivate( phFriNfc_Llcp_t *Llcp );

/*!
 * \brief TODO
 */
NFCSTATUS phFriNfc_Llcp_GetLocalInfo( phFriNfc_Llcp_t                   *Llcp,
                                      phFriNfc_Llcp_sLinkParameters_t   *pParams );

/*!
 * \brief TODO
 */
NFCSTATUS phFriNfc_Llcp_GetRemoteInfo( phFriNfc_Llcp_t                  *Llcp,
                                       phFriNfc_Llcp_sLinkParameters_t  *pParams );

/*!
 * \brief TODO
 */
NFCSTATUS phFriNfc_Llcp_Send( phFriNfc_Llcp_t                  *Llcp,
                              phFriNfc_Llcp_sPacketHeader_t    *psHeader,
                              phFriNfc_Llcp_sPacketSequence_t  *psSequence,
                              phNfc_sData_t                    *psInfo,
                              phFriNfc_Llcp_Send_CB_t          pfSend_CB,
                              void                             *pContext );

/*!
 * \brief TODO
 */
NFCSTATUS phFriNfc_Llcp_Recv( phFriNfc_Llcp_t            *Llcp,
                              phFriNfc_Llcp_Recv_CB_t    pfRecv_CB,
                              void                       *pContext );


#endif /* PHFRINFC_LLCP_H */