pn7150.h

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#pragma once

#include "esphome/components/nfc/automation.h"
#include "esphome/components/nfc/nci_core.h"
#include "esphome/components/nfc/nci_message.h"
#include "esphome/components/nfc/nfc.h"
#include "esphome/components/nfc/nfc_helpers.h"
#include "esphome/core/component.h"
#include "esphome/core/gpio.h"
#include "esphome/core/helpers.h"

#include <functional>

namespace esphome {
namespace pn7150 {

static const uint16_t NFCC_DEFAULT_TIMEOUT = 10;
static const uint16_t NFCC_INIT_TIMEOUT = 50;
static const uint16_t NFCC_TAG_WRITE_TIMEOUT = 15;

static const uint8_t NFCC_MAX_COMM_FAILS = 3;
static const uint8_t NFCC_MAX_ERROR_COUNT = 10;

static const uint8_t XCHG_DATA_OID = 0x10;
static const uint8_t MF_SECTORSEL_OID = 0x32;
static const uint8_t MFC_AUTHENTICATE_OID = 0x40;
static const uint8_t TEST_PRBS_OID = 0x30;
static const uint8_t TEST_ANTENNA_OID = 0x3D;
static const uint8_t TEST_GET_REGISTER_OID = 0x33;

static const uint8_t MFC_AUTHENTICATE_PARAM_KS_A = 0x00;  // key select A
static const uint8_t MFC_AUTHENTICATE_PARAM_KS_B = 0x80;  // key select B
static const uint8_t MFC_AUTHENTICATE_PARAM_EMBED_KEY = 0x10;

static const uint8_t CARD_EMU_T4T_APP_SELECT[] = {0x00, 0xA4, 0x04, 0x00, 0x07, 0xD2, 0x76,
                                                  0x00, 0x00, 0x85, 0x01, 0x01, 0x00};
static const uint8_t CARD_EMU_T4T_CC[] = {0x00, 0x0F, 0x20, 0x00, 0xFF, 0x00, 0xFF, 0x04,
                                          0x06, 0xE1, 0x04, 0x00, 0xFF, 0x00, 0x00};
static const uint8_t CARD_EMU_T4T_CC_SELECT[] = {0x00, 0xA4, 0x00, 0x0C, 0x02, 0xE1, 0x03};
static const uint8_t CARD_EMU_T4T_NDEF_SELECT[] = {0x00, 0xA4, 0x00, 0x0C, 0x02, 0xE1, 0x04};
static const uint8_t CARD_EMU_T4T_READ[] = {0x00, 0xB0};
static const uint8_t CARD_EMU_T4T_WRITE[] = {0x00, 0xD6};
static const uint8_t CARD_EMU_T4T_OK[] = {0x90, 0x00};
static const uint8_t CARD_EMU_T4T_NOK[] = {0x6A, 0x82};

static const uint8_t CORE_CONFIG_SOLO[] = {0x01,   // Number of parameter fields
                                           0x00,   // config param identifier (TOTAL_DURATION)
                                           0x02,   // length of value
                                           0x01,   // TOTAL_DURATION (low)...
                                           0x00};  // TOTAL_DURATION (high): 1 ms

static const uint8_t CORE_CONFIG_RW_CE[] = {0x01,   // Number of parameter fields
                                            0x00,   // config param identifier (TOTAL_DURATION)
                                            0x02,   // length of value
                                            0xF8,   // TOTAL_DURATION (low)...
                                            0x02};  // TOTAL_DURATION (high): 760 ms

static const uint8_t PMU_CFG[] = {
    0x01,        // Number of parameters
    0xA0, 0x0E,  // ext. tag
    3,           // length
    0x06,        // VBAT1 connected to 5V (CFG2)
    0x64,        // TVDD monitoring threshold = 5.0V; TxLDO voltage = 4.7V (in reader & card modes)
    0x01,        // RFU; must be 0x00 for CFG1 and 0x01 for CFG2
};

static const uint8_t RF_DISCOVER_MAP_CONFIG[] = {  // poll modes
    nfc::PROT_T1T,    nfc::RF_DISCOVER_MAP_MODE_POLL,
    nfc::INTF_FRAME,  // poll mode
    nfc::PROT_T2T,    nfc::RF_DISCOVER_MAP_MODE_POLL,
    nfc::INTF_FRAME,  // poll mode
    nfc::PROT_T3T,    nfc::RF_DISCOVER_MAP_MODE_POLL,
    nfc::INTF_FRAME,  // poll mode
    nfc::PROT_ISODEP, nfc::RF_DISCOVER_MAP_MODE_POLL | nfc::RF_DISCOVER_MAP_MODE_LISTEN,
    nfc::INTF_ISODEP,  // poll & listen mode
    nfc::PROT_MIFARE, nfc::RF_DISCOVER_MAP_MODE_POLL,
    nfc::INTF_TAGCMD};  // poll mode

static const uint8_t RF_DISCOVERY_LISTEN_CONFIG[] = {nfc::MODE_LISTEN_MASK | nfc::TECH_PASSIVE_NFCA,   // listen mode
                                                     nfc::MODE_LISTEN_MASK | nfc::TECH_PASSIVE_NFCB,   // listen mode
                                                     nfc::MODE_LISTEN_MASK | nfc::TECH_PASSIVE_NFCF};  // listen mode

static const uint8_t RF_DISCOVERY_POLL_CONFIG[] = {nfc::MODE_POLL | nfc::TECH_PASSIVE_NFCA,   // poll mode
                                                   nfc::MODE_POLL | nfc::TECH_PASSIVE_NFCB,   // poll mode
                                                   nfc::MODE_POLL | nfc::TECH_PASSIVE_NFCF};  // poll mode

static const uint8_t RF_DISCOVERY_CONFIG[] = {nfc::MODE_POLL | nfc::TECH_PASSIVE_NFCA,          // poll mode
                                              nfc::MODE_POLL | nfc::TECH_PASSIVE_NFCB,          // poll mode
                                              nfc::MODE_POLL | nfc::TECH_PASSIVE_NFCF,          // poll mode
                                              nfc::MODE_LISTEN_MASK | nfc::TECH_PASSIVE_NFCA,   // listen mode
                                              nfc::MODE_LISTEN_MASK | nfc::TECH_PASSIVE_NFCB,   // listen mode
                                              nfc::MODE_LISTEN_MASK | nfc::TECH_PASSIVE_NFCF};  // listen mode

static const uint8_t RF_LISTEN_MODE_ROUTING_CONFIG[] = {0x00,  // "more" (another message is coming)
                                                        1,     // number of table entries
                                                        0x01,  // type = protocol-based
                                                        3,     // length
                                                        0,     // DH NFCEE ID, a static ID representing the DH-NFCEE
                                                        0x01,  // power state
                                                        nfc::PROT_ISODEP};  // protocol

enum class CardEmulationState : uint8_t {
  CARD_EMU_IDLE,
  CARD_EMU_NDEF_APP_SELECTED,
  CARD_EMU_CC_SELECTED,
  CARD_EMU_NDEF_SELECTED,
  CARD_EMU_DESFIRE_PROD,
};

enum class NCIState : uint8_t {
  NONE = 0x00,
  NFCC_RESET,
  NFCC_INIT,
  NFCC_CONFIG,
  NFCC_SET_DISCOVER_MAP,
  NFCC_SET_LISTEN_MODE_ROUTING,
  RFST_IDLE,
  RFST_DISCOVERY,
  RFST_W4_ALL_DISCOVERIES,
  RFST_W4_HOST_SELECT,
  RFST_LISTEN_ACTIVE,
  RFST_LISTEN_SLEEP,
  RFST_POLL_ACTIVE,
  EP_DEACTIVATING,
  EP_SELECTING,
  TEST = 0XFE,
  FAILED = 0XFF,
};

enum class TestMode : uint8_t {
  TEST_NONE = 0x00,
  TEST_PRBS,
  TEST_ANTENNA,
  TEST_GET_REGISTER,
};

struct DiscoveredEndpoint {
  uint8_t id;
  uint8_t protocol;
  uint32_t last_seen;
  std::unique_ptr<nfc::NfcTag> tag;
  bool trig_called;
};

class PN7150 : public nfc::Nfcc, public Component {
 public:
  void setup() override;
  void dump_config() override;
  float get_setup_priority() const override { return setup_priority::DATA; }
  void loop() override;

  void set_irq_pin(GPIOPin *irq_pin) { this->irq_pin_ = irq_pin; }
  void set_ven_pin(GPIOPin *ven_pin) { this->ven_pin_ = ven_pin; }

  void set_tag_ttl(uint32_t ttl) { this->tag_ttl_ = ttl; }
  void set_tag_emulation_message(std::shared_ptr<nfc::NdefMessage> message);
  void set_tag_emulation_message(const optional<std::string> &message, optional<bool> include_android_app_record);
  void set_tag_emulation_message(const char *message, bool include_android_app_record = true);
  void set_tag_emulation_off();
  void set_tag_emulation_on();
  bool tag_emulation_enabled() { return this->listening_enabled_; }

  void set_polling_off();
  void set_polling_on();
  bool polling_enabled() { return this->polling_enabled_; }

  void register_ontag_trigger(nfc::NfcOnTagTrigger *trig) { this->triggers_ontag_.push_back(trig); }
  void register_ontagremoved_trigger(nfc::NfcOnTagTrigger *trig) { this->triggers_ontagremoved_.push_back(trig); }

  void add_on_emulated_tag_scan_callback(std::function<void()> callback) {
    this->on_emulated_tag_scan_callback_.add(std::move(callback));
  }

  void add_on_finished_write_callback(std::function<void()> callback) {
    this->on_finished_write_callback_.add(std::move(callback));
  }

  bool is_writing() { return this->next_task_ != EP_READ; };

  void read_mode();
  void clean_mode();
  void format_mode();
  void write_mode();
  void set_tag_write_message(std::shared_ptr<nfc::NdefMessage> message);
  void set_tag_write_message(optional<std::string> message, optional<bool> include_android_app_record);

  uint8_t set_test_mode(TestMode test_mode, const std::vector<uint8_t> &data, std::vector<uint8_t> &result);

 protected:
  uint8_t reset_core_(bool reset_config, bool power);
  uint8_t init_core_();
  uint8_t send_init_config_();
  uint8_t send_core_config_();
  uint8_t refresh_core_config_();

  uint8_t set_discover_map_();

  uint8_t set_listen_mode_routing_();

  uint8_t start_discovery_();
  uint8_t stop_discovery_();
  uint8_t deactivate_(uint8_t type, uint16_t timeout = NFCC_DEFAULT_TIMEOUT);

  void select_endpoint_();

  uint8_t read_endpoint_data_(nfc::NfcTag &tag);
  uint8_t clean_endpoint_(std::vector<uint8_t> &uid);
  uint8_t format_endpoint_(std::vector<uint8_t> &uid);
  uint8_t write_endpoint_(std::vector<uint8_t> &uid, std::shared_ptr<nfc::NdefMessage> &message);

  std::unique_ptr<nfc::NfcTag> build_tag_(uint8_t mode_tech, const std::vector<uint8_t> &data);
  optional<size_t> find_tag_uid_(const std::vector<uint8_t> &uid);
  void purge_old_tags_();
  void erase_tag_(uint8_t tag_index);

  void nci_fsm_transition_();
  void nci_fsm_set_state_(NCIState new_state);
  bool nci_fsm_set_error_state_(NCIState new_state);
  void process_message_();
  void process_rf_intf_activated_oid_(nfc::NciMessage &rx);
  void process_rf_discover_oid_(nfc::NciMessage &rx);
  void process_rf_deactivate_oid_(nfc::NciMessage &rx);
  void process_data_message_(nfc::NciMessage &rx);

  void card_emu_t4t_get_response_(std::vector<uint8_t> &response, std::vector<uint8_t> &ndef_response);

  uint8_t transceive_(nfc::NciMessage &tx, nfc::NciMessage &rx, uint16_t timeout = NFCC_DEFAULT_TIMEOUT,
                      bool expect_notification = true);
  virtual uint8_t read_nfcc(nfc::NciMessage &rx, uint16_t timeout) = 0;
  virtual uint8_t write_nfcc(nfc::NciMessage &tx) = 0;

  uint8_t wait_for_irq_(uint16_t timeout = NFCC_DEFAULT_TIMEOUT, bool pin_state = true);

  uint8_t read_mifare_classic_tag_(nfc::NfcTag &tag);
  uint8_t read_mifare_classic_block_(uint8_t block_num, std::vector<uint8_t> &data);
  uint8_t write_mifare_classic_block_(uint8_t block_num, std::vector<uint8_t> &data);
  uint8_t auth_mifare_classic_block_(uint8_t block_num, uint8_t key_num, const uint8_t *key);
  uint8_t sect_to_auth_(uint8_t block_num);
  uint8_t format_mifare_classic_mifare_();
  uint8_t format_mifare_classic_ndef_();
  uint8_t write_mifare_classic_tag_(const std::shared_ptr<nfc::NdefMessage> &message);
  uint8_t halt_mifare_classic_tag_();

  uint8_t read_mifare_ultralight_tag_(nfc::NfcTag &tag);
  uint8_t read_mifare_ultralight_bytes_(uint8_t start_page, uint16_t num_bytes, std::vector<uint8_t> &data);
  bool is_mifare_ultralight_formatted_(const std::vector<uint8_t> &page_3_to_6);
  uint16_t read_mifare_ultralight_capacity_();
  uint8_t find_mifare_ultralight_ndef_(const std::vector<uint8_t> &page_3_to_6, uint8_t &message_length,
                                       uint8_t &message_start_index);
  uint8_t write_mifare_ultralight_page_(uint8_t page_num, std::vector<uint8_t> &write_data);
  uint8_t write_mifare_ultralight_tag_(std::vector<uint8_t> &uid, const std::shared_ptr<nfc::NdefMessage> &message);
  uint8_t clean_mifare_ultralight_();

  enum NfcTask : uint8_t {
    EP_READ = 0,
    EP_CLEAN,
    EP_FORMAT,
    EP_WRITE,
  } next_task_{EP_READ};

  bool config_refresh_pending_{false};
  bool core_config_is_solo_{false};
  bool listening_enabled_{false};
  bool polling_enabled_{true};

  uint8_t error_count_{0};
  uint8_t fail_count_{0};
  uint32_t last_nci_state_change_{0};
  uint8_t selecting_endpoint_{0};
  uint32_t tag_ttl_{250};

  GPIOPin *irq_pin_{nullptr};
  GPIOPin *ven_pin_{nullptr};

  CallbackManager<void()> on_emulated_tag_scan_callback_;
  CallbackManager<void()> on_finished_write_callback_;

  std::vector<DiscoveredEndpoint> discovered_endpoint_;

  CardEmulationState ce_state_{CardEmulationState::CARD_EMU_IDLE};
  NCIState nci_state_{NCIState::NFCC_RESET};
  NCIState nci_state_error_{NCIState::NONE};

  std::shared_ptr<nfc::NdefMessage> card_emulation_message_;
  std::shared_ptr<nfc::NdefMessage> next_task_message_to_write_;

  std::vector<nfc::NfcOnTagTrigger *> triggers_ontag_;
  std::vector<nfc::NfcOnTagTrigger *> triggers_ontagremoved_;
};

}  // namespace pn7150
}  // namespace esphome