
/******************************************************************************
  * \attention
  *
  * <h2><center>&copy; COPYRIGHT 2020 STMicroelectronics</center></h2>
  *
  * Licensed under ST MYLIBERTY SOFTWARE LICENSE AGREEMENT (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        www.st.com/myliberty
  *
  * 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,
  * AND SPECIFICALLY DISCLAIMING THE IMPLIED WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
******************************************************************************/

/*
 *      PROJECT:   ST25R391x firmware
 *      Revision:
 *      LANGUAGE:  ISO C99
 */

/*! \file rfal_nfc.h
 *
 *  \brief RFAL NFC device
 *  
 *  This module provides the required features to behave as an NFC Poller 
 *  or Listener device. It grants an easy to use interface for the following
 *  activities: Technology Detection, Collision Resolution, Activation,
 *  Data Exchange, and Deactivation
 *  
 *  This layer is influenced by (but not fully aligned with) the NFC Forum 
 *  specifications, in particular: Activity 2.0 and NCI 2.0
 *
 *  
 *    
 * \addtogroup RFAL
 * @{
 * 
 * \addtogroup RFAL-HL
 * \brief RFAL Higher Layer
 * @{
 * 
 * \addtogroup NFC
 * \brief RFAL NFC Device
 * @{
 *  
 */

#ifndef RFAL_NFC_H
#define RFAL_NFC_H

/*
******************************************************************************
* INCLUDES
******************************************************************************
*/
#include "platform.h"
#include "st_errno.h"
#include "rfal_rf.h"
#include "rfal_nfca.h"
#include "rfal_nfcb.h"
#include "rfal_nfcf.h"
#include "rfal_nfcv.h"
#include "rfal_st25tb.h"
#include "rfal_nfcDep.h"
#include "rfal_isoDep.h"

/*
******************************************************************************
* GLOBAL DEFINES
******************************************************************************
*/

#define RFAL_NFC_TECH_NONE 0x0000U /*!< No technology             */
#define RFAL_NFC_POLL_TECH_A 0x0001U /*!< NFC-A technology Flag     */
#define RFAL_NFC_POLL_TECH_B 0x0002U /*!< NFC-B technology Flag     */
#define RFAL_NFC_POLL_TECH_F 0x0004U /*!< NFC-F technology Flag     */
#define RFAL_NFC_POLL_TECH_V 0x0008U /*!< NFC-V technology Flag     */
#define RFAL_NFC_POLL_TECH_AP2P 0x0010U /*!< AP2P technology Flag      */
#define RFAL_NFC_POLL_TECH_ST25TB 0x0020U /*!< ST25TB technology Flag    */
#define RFAL_NFC_LISTEN_TECH_A 0x1000U /*!< NFC-V technology Flag     */
#define RFAL_NFC_LISTEN_TECH_B 0x2000U /*!< NFC-V technology Flag     */
#define RFAL_NFC_LISTEN_TECH_F 0x4000U /*!< NFC-V technology Flag     */
#define RFAL_NFC_LISTEN_TECH_AP2P 0x8000U /*!< NFC-V technology Flag     */

/*
******************************************************************************
* GLOBAL MACROS
******************************************************************************
*/

/*! Checks if a device is currently activated */
#define rfalNfcIsDevActivated(st) \
    (((st) >= RFAL_NFC_STATE_ACTIVATED) && ((st) < RFAL_NFC_STATE_DEACTIVATION))

/*! Checks if a device is in discovery */
#define rfalNfcIsInDiscovery(st) \
    (((st) >= RFAL_NFC_STATE_START_DISCOVERY) && ((st) < RFAL_NFC_STATE_ACTIVATED))

/*! Checks if remote device is in Poll mode */
#define rfalNfcIsRemDevPoller(tp) \
    (((tp) >= RFAL_NFC_POLL_TYPE_NFCA) && ((tp) <= RFAL_NFC_POLL_TYPE_AP2P))

/*! Checks if remote device is in Listen mode */
#define rfalNfcIsRemDevListener(tp) \
    (((int16_t)(tp) >= (int16_t)RFAL_NFC_LISTEN_TYPE_NFCA) && ((tp) <= RFAL_NFC_LISTEN_TYPE_AP2P))

/*
******************************************************************************
* GLOBAL ENUMS
******************************************************************************
*/

/*
******************************************************************************
* GLOBAL TYPES
******************************************************************************
*/

/*! Main state                                                                       */
typedef enum {
    RFAL_NFC_STATE_NOTINIT = 0, /*!< Not Initialized state       */
    RFAL_NFC_STATE_IDLE = 1, /*!< Initialize state            */
    RFAL_NFC_STATE_START_DISCOVERY = 2, /*!< Start Discovery loop state  */
    RFAL_NFC_STATE_WAKEUP_MODE = 3, /*!< Wake-Up state               */
    RFAL_NFC_STATE_POLL_TECHDETECT = 10, /*!< Technology Detection state  */
    RFAL_NFC_STATE_POLL_COLAVOIDANCE = 11, /*!< Collision Avoidance state   */
    RFAL_NFC_STATE_POLL_SELECT = 12, /*!< Wait for Selection state    */
    RFAL_NFC_STATE_POLL_ACTIVATION = 13, /*!< Activation state            */
    RFAL_NFC_STATE_LISTEN_TECHDETECT = 20, /*!< Listen Tech Detect          */
    RFAL_NFC_STATE_LISTEN_COLAVOIDANCE = 21, /*!< Listen Collision Avoidance  */
    RFAL_NFC_STATE_LISTEN_ACTIVATION = 22, /*!< Listen Activation state     */
    RFAL_NFC_STATE_LISTEN_SLEEP = 23, /*!< Listen Sleep state          */
    RFAL_NFC_STATE_ACTIVATED = 30, /*!< Activated state             */
    RFAL_NFC_STATE_DATAEXCHANGE = 31, /*!< Data Exchange Start state   */
    RFAL_NFC_STATE_DATAEXCHANGE_DONE = 33, /*!< Data Exchange terminated    */
    RFAL_NFC_STATE_DEACTIVATION = 34 /*!< Deactivation state          */
} rfalNfcState;

/*! Device type                                                                       */
typedef enum {
    RFAL_NFC_LISTEN_TYPE_NFCA = 0, /*!< NFC-A Listener device type  */
    RFAL_NFC_LISTEN_TYPE_NFCB = 1, /*!< NFC-B Listener device type  */
    RFAL_NFC_LISTEN_TYPE_NFCF = 2, /*!< NFC-F Listener device type  */
    RFAL_NFC_LISTEN_TYPE_NFCV = 3, /*!< NFC-V Listener device type  */
    RFAL_NFC_LISTEN_TYPE_ST25TB = 4, /*!< ST25TB Listener device type */
    RFAL_NFC_LISTEN_TYPE_AP2P = 5, /*!< AP2P Listener device type   */
    RFAL_NFC_POLL_TYPE_NFCA = 10, /*!< NFC-A Poller device type    */
    RFAL_NFC_POLL_TYPE_NFCB = 11, /*!< NFC-B Poller device type    */
    RFAL_NFC_POLL_TYPE_NFCF = 12, /*!< NFC-F Poller device type    */
    RFAL_NFC_POLL_TYPE_NFCV = 13, /*!< NFC-V Poller device type    */
    RFAL_NFC_POLL_TYPE_AP2P = 15 /*!< AP2P Poller device type     */
} rfalNfcDevType;

/*! Device interface                                                                 */
typedef enum {
    RFAL_NFC_INTERFACE_RF = 0, /*!< RF Frame interface          */
    RFAL_NFC_INTERFACE_ISODEP = 1, /*!< ISO-DEP interface           */
    RFAL_NFC_INTERFACE_NFCDEP = 2 /*!< NFC-DEP interface           */
} rfalNfcRfInterface;

/*! Device struct containing all its details                                          */
typedef struct {
    rfalNfcDevType type; /*!< Device's type                */
    union { /*  PRQA S 0750 # MISRA 19.2 - Members of the union will not be used concurrently, only one technology at a time */
        rfalNfcaListenDevice nfca; /*!< NFC-A Listen Device instance */
        rfalNfcbListenDevice nfcb; /*!< NFC-B Listen Device instance */
        rfalNfcfListenDevice nfcf; /*!< NFC-F Listen Device instance */
        rfalNfcvListenDevice nfcv; /*!< NFC-V Listen Device instance */
        rfalSt25tbListenDevice st25tb; /*!< ST25TB Listen Device instance*/
    } dev; /*!< Device's instance            */

    uint8_t* nfcid; /*!< Device's NFCID               */
    uint8_t nfcidLen; /*!< Device's NFCID length        */
    rfalNfcRfInterface rfInterface; /*!< Device's interface           */

    union { /*  PRQA S 0750 # MISRA 19.2 - Members of the union will not be used concurrently, only one protocol at a time */
        rfalIsoDepDevice isoDep; /*!< ISO-DEP instance             */
        rfalNfcDepDevice nfcDep; /*!< NFC-DEP instance             */
    } proto; /*!< Device's protocol            */
} rfalNfcDevice;

/*! Discovery parameters                                                                                           */
typedef struct {
    rfalComplianceMode compMode; /*!< Compliancy mode to be used                            */
    uint16_t techs2Find; /*!< Technologies to search for                            */
    uint16_t totalDuration; /*!< Duration of a whole Poll + Listen cycle               */
    uint8_t devLimit; /*!< Max number of devices                                 */
    rfalBitRate maxBR; /*!< Max Bit rate to be used for communications            */

    rfalBitRate nfcfBR; /*!< Bit rate to poll for NFC-F                            */
    uint8_t
        nfcid3[RFAL_NFCDEP_NFCID3_LEN]; /*!< NFCID3 to be used on the ATR_REQ/ATR_RES              */
    uint8_t GB[RFAL_NFCDEP_GB_MAX_LEN]; /*!< General bytes to be used on the ATR-REQ               */
    uint8_t GBLen; /*!< Length of the General Bytes                           */
    rfalBitRate ap2pBR; /*!< Bit rate to poll for AP2P                             */

    rfalLmConfPA lmConfigPA; /*!< Configuration for Passive Listen mode NFC-A           */
    rfalLmConfPF lmConfigPF; /*!< Configuration for Passive Listen mode NFC-A           */

    void (*notifyCb)(rfalNfcState st); /*!< Callback to Notify upper layer                        */

    bool wakeupEnabled; /*!< Enable Wake-Up mode before polling                    */
    bool wakeupConfigDefault; /*!< Wake-Up mode default configuration                    */
    rfalWakeUpConfig wakeupConfig; /*!< Wake-Up mode configuration                            */

    bool activate_after_sak; // Set device to Active mode after SAK responce
} rfalNfcDiscoverParam;

/*! Buffer union, only one interface is used at a time                                                             */
typedef union { /*  PRQA S 0750 # MISRA 19.2 - Members of the union will not be used concurrently, only one interface at a time */
    uint8_t rfBuf[RFAL_FEATURE_NFC_RF_BUF_LEN]; /*!< RF buffer                                    */
    rfalIsoDepApduBufFormat isoDepBuf; /*!< ISO-DEP buffer format (with header/prologue) */
    rfalNfcDepPduBufFormat nfcDepBuf; /*!< NFC-DEP buffer format (with header/prologue) */
} rfalNfcBuffer;

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

/*
******************************************************************************
* GLOBAL FUNCTION PROTOTYPES
******************************************************************************
*/

/*! 
 *****************************************************************************
 * \brief  RFAL NFC Worker
 *  
 * It runs the internal state machine and runs the RFAL RF worker.
 *****************************************************************************
 */
void rfalNfcWorker(void);

/*! 
 *****************************************************************************
 * \brief  RFAL NFC Initialize
 *  
 * It initializes this module and its dependencies
 *
 * \return ERR_WRONG_STATE  : Incorrect state for this operation
 * \return ERR_IO           : Generic internal error
 * \return ERR_NONE         : No error
 *****************************************************************************
 */
ReturnCode rfalNfcInitialize(void);

/*!
 *****************************************************************************
 * \brief  RFAL NFC Discovery
 *  
 * It set the device in Discovery state.
 * In discovery it will Poll and/or Listen for the technologies configured, 
 * and perform Wake-up mode if configured to do so.
 *
 * The device list passed on disParams must not be empty.
 * The number of devices on the list is indicated by the devLimit and shall
 * be at >= 1.
 *
 * \param[in]  disParams    : discovery configuration parameters
 *
 * \return ERR_WRONG_STATE  : Incorrect state for this operation
 * \return ERR_PARAM        : Invalid parameters
 * \return ERR_NONE         : No error
 *****************************************************************************
 */
ReturnCode rfalNfcDiscover(const rfalNfcDiscoverParam* disParams);

/*!
 *****************************************************************************
 * \brief  RFAL NFC Get State
 *  
 * It returns the current state
 *
 * \return rfalNfcState : the current state
 *****************************************************************************
 */
rfalNfcState rfalNfcGetState(void);

/*!
 *****************************************************************************
 * \brief  RFAL NFC Get Devices Found
 *  
 * It returns the location of the device list and the number of 
 * devices found.
 *
 * \param[out]  devList     : device list location
 * \param[out]  devCnt      : number of devices found
 *
 * \return ERR_WRONG_STATE  : Incorrect state for this operation
 *                            Discovery still ongoing
 * \return ERR_PARAM        : Invalid parameters
 * \return ERR_NONE         : No error
 *****************************************************************************
 */
ReturnCode rfalNfcGetDevicesFound(rfalNfcDevice** devList, uint8_t* devCnt);

/*!
 *****************************************************************************
 * \brief  RFAL NFC Get Active Device
 *  
 * It returns the location of the device current Active device
 *
 * \param[out]  dev           : device info location
 *
 * \return ERR_WRONG_STATE    : Incorrect state for this operation
 *                              No device activated
 * \return ERR_PARAM          : Invalid parameters
 * \return ERR_NONE           : No error
 *****************************************************************************
 */
ReturnCode rfalNfcGetActiveDevice(rfalNfcDevice** dev);

/*!
 *****************************************************************************
 * \brief  RFAL NFC Select Device
 *  
 * It selects the device to be activated.
 * It shall be called when more than one device has been identified to 
 * indiacte which device shall be actived
 * 
 * \param[in]  devIdx       : device index to be activated
 *
 * \return ERR_WRONG_STATE  : Incorrect state for this operation
 *                            Not in select state
 * \return ERR_PARAM        : Invalid parameters
 * \return ERR_NONE         : No error
 *****************************************************************************
 */
ReturnCode rfalNfcSelect(uint8_t devIdx);

/*!
 *****************************************************************************
 * \brief  RFAL NFC Start Data Exchange
 *  
 * After a device has been activated, it starts a data exchange.
 * It handles automatically which interface/protocol to be used and acts accordingly.
 *
 * In Listen mode the first frame/data shall be sent by the Reader/Initiator
 * therefore this method must be called first with txDataLen set to zero 
 * to retrieve the rxData and rcvLen locations.
 *
 *
 * \param[in]  txData       : data to be transmitted
 * \param[in]  txDataLen    : size of the data to be transmitted
 * \param[out] rxData       : location of the received data after operation is completed
 * \param[out] rvdLen       : location of thelength of the received data
 * \param[in]  fwt          : FWT to be used in case of RF interface.
 *                            If ISO-DEP or NFC-DEP interface is used, this will be ignored
 *
 * \return ERR_WRONG_STATE  : Incorrect state for this operation
 * \return ERR_PARAM        : Invalid parameters
 * \return ERR_NONE         : No error
 *****************************************************************************
 */
ReturnCode rfalNfcDataExchangeStart(
    uint8_t* txData,
    uint16_t txDataLen,
    uint8_t** rxData,
    uint16_t** rvdLen,
    uint32_t fwt,
    uint32_t tx_flag);

ReturnCode rfalNfcDataExchangeCustomStart(
    uint8_t* txData,
    uint16_t txDataLen,
    uint8_t** rxData,
    uint16_t** rvdLen,
    uint32_t fwt,
    uint32_t flags);

/*! 
 *****************************************************************************
 * \brief  RFAL NFC Get Data Exchange Status
 *  
 * Gets current Data Exchange status
 *
 * \return  ERR_NONE         : Transceive done with no error
 * \return  ERR_BUSY         : Transceive ongoing
 *  \return ERR_AGAIN        : received one chaining block, copy received data 
 *                             and continue to call this method to retrieve the 
 *                             remaining blocks
 * \return  ERR_XXXX         : Error occurred
 * \return  ERR_TIMEOUT      : No response
 * \return  ERR_FRAMING      : Framing error detected
 * \return  ERR_PAR          : Parity error detected
 * \return  ERR_CRC          : CRC error detected
 * \return  ERR_LINK_LOSS    : Link Loss - External Field is Off
 * \return  ERR_RF_COLLISION : Collision detected
 * \return  ERR_IO           : Internal error
 *****************************************************************************
 */
ReturnCode rfalNfcDataExchangeGetStatus(void);

/*! 
 *****************************************************************************
 * \brief  RFAL NFC Deactivate
 *  
 * It triggers the deactivation procedure to terminate communications with 
 * remote device. At the end the field will be turned off.
 *
 * \param[in]  discovery    : TRUE if after deactivation go back into discovery
 *                          : FALSE if after deactivation remain in idle
 *
 * \return ERR_WRONG_STATE  : Incorrect state for this operation
 * \return ERR_NONE         : No error
 *****************************************************************************
 */
ReturnCode rfalNfcDeactivate(bool discovery);

#endif /* RFAL_NFC_H */

/**
  * @}
  *
  * @}
  *
  * @}
  */
