flipperzero-firmware/lib/ST25RFAL002/source/rfal_nfcf.c

/******************************************************************************
  * \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_nfcf.c
 *
 *  \author Gustavo Patricio
 *
 *  \brief Implementation of NFC-F Poller (FeliCa PCD) device
 *
 *  The definitions and helpers methods provided by this module are 
 *  aligned with NFC-F (FeliCa - JIS X6319-4)
 *
 */

/*
 ******************************************************************************
 * INCLUDES
 ******************************************************************************
 */
#include "rfal_nfcf.h"
#include "utils.h"

/*
 ******************************************************************************
 * ENABLE SWITCH
 ******************************************************************************
 */

#ifndef RFAL_FEATURE_NFCF
#define RFAL_FEATURE_NFCF false /* NFC-F module configuration missing. Disabled by default */
#endif

#if RFAL_FEATURE_NFCF

/*
 ******************************************************************************
 * GLOBAL DEFINES
 ******************************************************************************
 */
#define RFAL_NFCF_SENSF_REQ_LEN_MIN \
    5U /*!< SENSF_RES minimum length                              */

#define RFAL_NFCF_READ_WO_ENCRYPTION_MIN_LEN \
    15U /*!< Minimum length for a Check Command         T3T  5.4.1 */
#define RFAL_NFCF_WRITE_WO_ENCRYPTION_MIN_LEN \
    31U /*!< Minimum length for an Update Command       T3T  5.5.1 */

#define RFAL_NFCF_CHECK_RES_MIN_LEN \
    11U /*!< CHECK Response minimum length       T3T 1.0  Table 8  */
#define RFAL_NFCF_UPDATE_RES_MIN_LEN \
    11U /*!< UPDATE Response minimum length      T3T 1.0  Table 8  */

#define RFAL_NFCF_CHECK_REQ_MAX_LEN \
    86U /*!< Max length of a Check request        T3T 1.0  Table 7 */
#define RFAL_NFCF_CHECK_REQ_MAX_SERV \
    15U /*!< Max Services number on Check request T3T 1.0  5.4.1.5 */
#define RFAL_NFCF_CHECK_REQ_MAX_BLOCK \
    15U /*!< Max Blocks number on Check request  T3T 1.0  5.4.1.10 */
#define RFAL_NFCF_UPDATE_REQ_MAX_SERV \
    15U /*!< Max Services number Update request  T3T 1.0  5.4.1.5  */
#define RFAL_NFCF_UPDATE_REQ_MAX_BLOCK \
    13U /*!< Max Blocks number on Update request T3T 1.0  5.4.1.10 */

/*! MRT Check | Uupdate = (Tt3t x ((A+1) + n (B+1)) x 4^E) + dRWTt3t    T3T  5.8
    Max values used: A = 7 ; B = 7 ; E = 3 ; n = 15 (NFC Forum n = 15, JIS n = 32)
*/
#define RFAL_NFCF_MRT_CHECK_UPDATE ((4096 * (8 + (15 * 8)) * 64) + 16)

/*
 ******************************************************************************
 * GLOBAL MACROS
 ******************************************************************************
 */
#define rfalNfcfSlots2CardNum(s) \
    ((uint8_t)(s) + 1U) /*!< Converts Time Slot Number (TSN) into num of slots  */

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

/*! Structure/Buffer to hold the SENSF_RES with LEN byte prepended                                 */
typedef struct {
    uint8_t LEN; /*!< NFC-F LEN byte                      */
    rfalNfcfSensfRes SENSF_RES; /*!< SENSF_RES                           */
} rfalNfcfSensfResBuf;

/*! Greedy collection for NFCF GRE_POLL_F  Activity 1.0 Table 10                                   */
typedef struct {
    uint8_t pollFound; /*!< Number of devices found by the Poll */
    uint8_t pollCollision; /*!< Number of collisions detected       */
    rfalFeliCaPollRes POLL_F[RFAL_NFCF_POLL_MAXCARDS]; /*!< GRE_POLL_F   Activity 1.0 Table 10  */
} rfalNfcfGreedyF;

/*! NFC-F SENSF_REQ format  Digital 1.1  8.6.1                     */
typedef struct {
    uint8_t CMD; /*!< Command code: 00h  */
    uint8_t SC[RFAL_NFCF_SENSF_SC_LEN]; /*!< System Code        */
    uint8_t RC; /*!< Request Code       */
    uint8_t TSN; /*!< Time Slot Number   */
} rfalNfcfSensfReq;

/*
******************************************************************************
* LOCAL VARIABLES
******************************************************************************
*/
static rfalNfcfGreedyF gRfalNfcfGreedyF; /*!< Activity's NFCF Greedy collection */

/*
******************************************************************************
* LOCAL FUNCTION PROTOTYPES
******************************************************************************
*/
static void rfalNfcfComputeValidSENF(
    rfalNfcfListenDevice* outDevInfo,
    uint8_t* curDevIdx,
    uint8_t devLimit,
    bool overwrite,
    bool* nfcDepFound);

/*
******************************************************************************
* LOCAL VARIABLES
******************************************************************************
*/

/*******************************************************************************/
static void rfalNfcfComputeValidSENF(
    rfalNfcfListenDevice* outDevInfo,
    uint8_t* curDevIdx,
    uint8_t