service: nfp: Rewrite and implement applet calls

src/core/CMakeLists.txt

@@ -523,9 +523,12 @@ add_library(core STATIC
     hle/service/nfc/nfc.h
     hle/service/nfp/amiibo_crypto.cpp
     hle/service/nfp/amiibo_crypto.h
-    hle/service/nfp/amiibo_types.h
     hle/service/nfp/nfp.cpp
     hle/service/nfp/nfp.h
+    hle/service/nfp/nfp_device.cpp
+    hle/service/nfp/nfp_device.h
+    hle/service/nfp/nfp_result.h
+    hle/service/nfp/nfp_types.h
     hle/service/nfp/nfp_user.cpp
     hle/service/nfp/nfp_user.h
     hle/service/ngct/ngct.cpp

src/core/hle/service/mii/mii_manager.cpp

@@ -427,12 +427,12 @@ CharInfo MiiManager::BuildDefault(std::size_t index) {
     return ConvertStoreDataToInfo(BuildDefaultStoreData(RawData::DefaultMii.at(index), user_id));
 }
 
-CharInfo MiiManager::ConvertV3ToCharInfo(Ver3StoreData mii_v3) const {
+CharInfo MiiManager::ConvertV3ToCharInfo(const Ver3StoreData& mii_v3) const {
     Service::Mii::MiiManager manager;
     auto mii = manager.BuildDefault(0);
 
     // Check if mii data exist
-    if (mii_v3.mii_name[0] == 0) {
+    if (mii_v3.version == 0) {
         return mii;
     }
 
@@ -443,8 +443,8 @@ CharInfo MiiManager::ConvertV3ToCharInfo(Ver3StoreData mii_v3) const {
     mii.height = mii_v3.height;
     mii.build = mii_v3.build;
 
-    memset(mii.name.data(), 0, sizeof(mii.name));
-    memcpy(mii.name.data(), mii_v3.mii_name.data(), sizeof(mii_v3.mii_name));
+    memset(mii.name.data(), 0, mii.name.size());
+    memcpy(mii.name.data(), mii_v3.mii_name.data(), mii_v3.mii_name.size());
     mii.font_region = mii_v3.region_information.character_set;
 
     mii.faceline_type = mii_v3.appearance_bits1.face_shape;
@@ -504,6 +504,78 @@ CharInfo MiiManager::ConvertV3ToCharInfo(Ver3StoreData mii_v3) const {
     return mii;
 }
 
+Ver3StoreData MiiManager::ConvertCharInfoToV3(const CharInfo& mii) const {
+    Service::Mii::MiiManager manager;
+    Ver3StoreData mii_v3{};
+
+    // TODO: We are ignoring a bunch of data from the mii_v3
+
+    mii_v3.version = 1;
+    mii_v3.mii_information.gender.Assign(mii.gender);
+    mii_v3.mii_information.favorite_color.Assign(mii.favorite_color);
+    mii_v3.height = mii.height;
+    mii_v3.build = mii.build;
+
+    memcpy(mii_v3.mii_name.data(), mii.name.data(), mii.name.size());
+    mii_v3.region_information.character_set.Assign(mii.font_region);
+
+    mii_v3.appearance_bits1.face_shape.Assign(mii.faceline_type);
+    mii_v3.appearance_bits1.skin_color.Assign(mii.faceline_color);
+    mii_v3.appearance_bits2.wrinkles.Assign(mii.faceline_wrinkle);
+    mii_v3.appearance_bits2.makeup.Assign(mii.faceline_make);
+
+    mii_v3.hair_style = mii.hair_type;
+    mii_v3.appearance_bits3.hair_color.Assign(mii.hair_color);
+    mii_v3.appearance_bits3.flip_hair.Assign(mii.hair_flip);
+
+    mii_v3.appearance_bits4.eye_type.Assign(mii.eye_type);
+    mii_v3.appearance_bits4.eye_color.Assign(mii.eye_color);
+    mii_v3.appearance_bits4.eye_scale.Assign(mii.eye_scale);
+    mii_v3.appearance_bits4.eye_vertical_stretch.Assign(mii.eye_aspect);
+    mii_v3.appearance_bits4.eye_rotation.Assign(mii.eye_rotate);
+    mii_v3.appearance_bits4.eye_spacing.Assign(mii.eye_x);
+    mii_v3.appearance_bits4.eye_y_position.Assign(mii.eye_y);
+
+    mii_v3.appearance_bits5.eyebrow_style.Assign(mii.eyebrow_type);
+    mii_v3.appearance_bits5.eyebrow_color.Assign(mii.eyebrow_color);
+    mii_v3.appearance_bits5.eyebrow_scale.Assign(mii.eyebrow_scale);
+    mii_v3.appearance_bits5.eyebrow_yscale.Assign(mii.eyebrow_aspect);
+    mii_v3.appearance_bits5.eyebrow_rotation.Assign(mii.eyebrow_rotate);
+    mii_v3.appearance_bits5.eyebrow_spacing.Assign(mii.eyebrow_x);
+    mii_v3.appearance_bits5.eyebrow_y_position.Assign(mii.eyebrow_y);
+
+    mii_v3.appearance_bits6.nose_type.Assign(mii.nose_type);
+    mii_v3.appearance_bits6.nose_scale.Assign(mii.nose_scale);
+    mii_v3.appearance_bits6.nose_y_position.Assign(mii.nose_y);
+
+    mii_v3.appearance_bits7.mouth_type.Assign(mii.mouth_type);
+    mii_v3.appearance_bits7.mouth_color.Assign(mii.mouth_color);
+    mii_v3.appearance_bits7.mouth_scale.Assign(mii.mouth_scale);
+    mii_v3.appearance_bits7.mouth_horizontal_stretch.Assign(mii.mouth_aspect);
+    mii_v3.appearance_bits8.mouth_y_position.Assign(mii.mouth_y);
+
+    mii_v3.appearance_bits8.mustache_type.Assign(mii.mustache_type);
+    mii_v3.appearance_bits9.mustache_scale.Assign(mii.mustache_scale);
+    mii_v3.appearance_bits9.mustache_y_position.Assign(mii.mustache_y);
+
+    mii_v3.appearance_bits9.bear_type.Assign(mii.beard_type);
+    mii_v3.appearance_bits9.facial_hair_color.Assign(mii.beard_color);
+
+    mii_v3.appearance_bits10.glasses_type.Assign(mii.glasses_type);
+    mii_v3.appearance_bits10.glasses_color.Assign(mii.glasses_color);
+    mii_v3.appearance_bits10.glasses_scale.Assign(mii.glasses_scale);
+    mii_v3.appearance_bits10.glasses_y_position.Assign(mii.glasses_y);
+
+    mii_v3.appearance_bits11.mole_enabled.Assign(mii.mole_type);
+    mii_v3.appearance_bits11.mole_scale.Assign(mii.mole_scale);
+    mii_v3.appearance_bits11.mole_x_position.Assign(mii.mole_x);
+    mii_v3.appearance_bits11.mole_y_position.Assign(mii.mole_y);
+
+    // TODO: Validate mii_v3 data
+
+    return mii_v3;
+}
+
 ResultVal<std::vector<MiiInfoElement>> MiiManager::GetDefault(SourceFlag source_flag) {
     std::vector<MiiInfoElement> result;
 

src/core/hle/service/mii/mii_manager.h

@@ -22,7 +22,8 @@ public:
     ResultVal<CharInfo> UpdateLatest(const CharInfo& info, SourceFlag source_flag);
     CharInfo BuildRandom(Age age, Gender gender, Race race);
     CharInfo BuildDefault(std::size_t index);
-    CharInfo ConvertV3ToCharInfo(Ver3StoreData mii_v3) const;
+    CharInfo ConvertV3ToCharInfo(const Ver3StoreData& mii_v3) const;
+    Ver3StoreData ConvertCharInfoToV3(const CharInfo& mii) const;
     ResultVal<std::vector<MiiInfoElement>> GetDefault(SourceFlag source_flag);
     Result GetIndex(const CharInfo& info, u32& index);
 

src/core/hle/service/nfp/amiibo_crypto.cpp

@@ -20,13 +20,13 @@ bool IsAmiiboValid(const EncryptedNTAG215File& ntag_file) {
     const auto& amiibo_data = ntag_file.user_memory;
     LOG_DEBUG(Service_NFP, "uuid_lock=0x{0:x}", ntag_file.static_lock);
     LOG_DEBUG(Service_NFP, "compability_container=0x{0:x}", ntag_file.compability_container);
-    LOG_INFO(Service_NFP, "write_count={}", amiibo_data.write_counter);
+    LOG_DEBUG(Service_NFP, "write_count={}", static_cast<u16>(amiibo_data.write_counter));
 
-    LOG_INFO(Service_NFP, "character_id=0x{0:x}", amiibo_data.model_info.character_id);
-    LOG_INFO(Service_NFP, "character_variant={}", amiibo_data.model_info.character_variant);
-    LOG_INFO(Service_NFP, "amiibo_type={}", amiibo_data.model_info.amiibo_type);
-    LOG_INFO(Service_NFP, "model_number=0x{0:x}", amiibo_data.model_info.model_number);
-    LOG_INFO(Service_NFP, "series={}", amiibo_data.model_info.series);
+    LOG_DEBUG(Service_NFP, "character_id=0x{0:x}", amiibo_data.model_info.character_id);
+    LOG_DEBUG(Service_NFP, "character_variant={}", amiibo_data.model_info.character_variant);
+    LOG_DEBUG(Service_NFP, "amiibo_type={}", amiibo_data.model_info.amiibo_type);
+    LOG_DEBUG(Service_NFP, "model_number=0x{0:x}", amiibo_data.model_info.model_number);
+    LOG_DEBUG(Service_NFP, "series={}", amiibo_data.model_info.series);
     LOG_DEBUG(Service_NFP, "fixed_value=0x{0:x}", amiibo_data.model_info.constant_value);
 
     LOG_DEBUG(Service_NFP, "tag_dynamic_lock=0x{0:x}", ntag_file.dynamic_lock);

src/core/hle/service/nfp/amiibo_crypto.h

@@ -5,7 +5,7 @@
 
 #include <array>
 
-#include "core/hle/service/nfp/amiibo_types.h"
+#include "core/hle/service/nfp/nfp_types.h"
 
 struct mbedtls_md_context_t;
 
@@ -22,7 +22,7 @@ using HmacKey = std::array<u8, 0x10>;
 using DrgbOutput = std::array<u8, 0x20>;
 
 struct HashSeed {
-    u16 magic;
+    u16_be magic;
     std::array<u8, 0xE> padding;
     std::array<u8, 0x8> uuid1;
     std::array<u8, 0x8> uuid2;

src/core/hle/service/nfp/nfp.h

@@ -3,170 +3,9 @@
 
 #pragma once
 
-#include <array>
-#include <vector>
-
-#include "common/common_funcs.h"
-#include "core/hle/service/kernel_helpers.h"
-#include "core/hle/service/mii/types.h"
-#include "core/hle/service/nfp/amiibo_types.h"
 #include "core/hle/service/service.h"
 
-namespace Kernel {
-class KEvent;
-class KReadableEvent;
-} // namespace Kernel
-
-namespace Core::HID {
-enum class NpadIdType : u32;
-} // namespace Core::HID
-
 namespace Service::NFP {
-using AmiiboName = std::array<char, (amiibo_name_length * 4) + 1>;
-
-struct TagInfo {
-    TagUuid uuid;
-    u8 uuid_length;
-    INSERT_PADDING_BYTES(0x15);
-    s32 protocol;
-    u32 tag_type;
-    INSERT_PADDING_BYTES(0x30);
-};
-static_assert(sizeof(TagInfo) == 0x58, "TagInfo is an invalid size");
-
-struct CommonInfo {
-    u16 last_write_year;
-    u8 last_write_month;
-    u8 last_write_day;
-    u16 write_counter;
-    u16 version;
-    u32 application_area_size;
-    INSERT_PADDING_BYTES(0x34);
-};
-static_assert(sizeof(CommonInfo) == 0x40, "CommonInfo is an invalid size");
-
-struct ModelInfo {
-    u16 character_id;
-    u8 character_variant;
-    AmiiboType amiibo_type;
-    u16 model_number;
-    AmiiboSeries series;
-    u8 constant_value;          // Must be 02
-    INSERT_PADDING_BYTES(0x38); // Unknown
-};
-static_assert(sizeof(ModelInfo) == 0x40, "ModelInfo is an invalid size");
-
-struct RegisterInfo {
-    Service::Mii::CharInfo mii_char_info;
-    u16 first_write_year;
-    u8 first_write_month;
-    u8 first_write_day;
-    AmiiboName amiibo_name;
-    u8 font_region;
-    INSERT_PADDING_BYTES(0x7A);
-};
-static_assert(sizeof(RegisterInfo) == 0x100, "RegisterInfo is an invalid size");
-
-class Module final {
-public:
-    class Interface : public ServiceFramework<Interface> {
-    public:
-        explicit Interface(std::shared_ptr<Module> module_, Core::System& system_,
-                           const char* name);
-        ~Interface() override;
-
-        void CreateUserInterface(Kernel::HLERequestContext& ctx);
-        bool LoadAmiibo(const std::string& filename);
-        bool LoadAmiiboFile(const std::string& filename);
-        void CloseAmiibo();
-
-        void Initialize();
-        void Finalize();
-
-        Result StartDetection(s32 protocol_);
-        Result StopDetection();
-        Result Mount();
-        Result Unmount();
-        Result Flush();
-
-        Result GetTagInfo(TagInfo& tag_info) const;
-        Result GetCommonInfo(CommonInfo& common_info) const;
-        Result GetModelInfo(ModelInfo& model_info) const;
-        Result GetRegisterInfo(RegisterInfo& register_info) const;
-
-        Result OpenApplicationArea(u32 access_id);
-        Result GetApplicationArea(ApplicationArea& data) const;
-        Result SetApplicationArea(const std::vector<u8>& data);
-        Result CreateApplicationArea(u32 access_id, const std::vector<u8>& data);
-        Result RecreateApplicationArea(u32 access_id, const std::vector<u8>& data);
-
-        u64 GetHandle() const;
-        DeviceState GetCurrentState() const;
-        Core::HID::NpadIdType GetNpadId() const;
-
-        Kernel::KReadableEvent& GetActivateEvent() const;
-        Kernel::KReadableEvent& GetDeactivateEvent() const;
-
-    protected:
-        std::shared_ptr<Module> module;
-
-    private:
-        AmiiboName GetAmiiboName(const AmiiboSettings& settings) const;
-
-        const Core::HID::NpadIdType npad_id;
-
-        bool is_data_decoded{};
-        bool is_application_area_initialized{};
-        s32 protocol;
-        std::string file_path{};
-        Kernel::KEvent* activate_event;
-        Kernel::KEvent* deactivate_event;
-        DeviceState device_state{DeviceState::Unaviable};
-        KernelHelpers::ServiceContext service_context;
-
-        NTAG215File tag_data{};
-        EncryptedNTAG215File encrypted_tag_data{};
-    };
-};
-
-class IUser final : public ServiceFramework<IUser> {
-public:
-    explicit IUser(Module::Interface& nfp_interface_, Core::System& system_);
-
-private:
-    void Initialize(Kernel::HLERequestContext& ctx);
-    void Finalize(Kernel::HLERequestContext& ctx);
-    void ListDevices(Kernel::HLERequestContext& ctx);
-    void StartDetection(Kernel::HLERequestContext& ctx);
-    void StopDetection(Kernel::HLERequestContext& ctx);
-    void Mount(Kernel::HLERequestContext& ctx);
-    void Unmount(Kernel::HLERequestContext& ctx);
-    void OpenApplicationArea(Kernel::HLERequestContext& ctx);
-    void GetApplicationArea(Kernel::HLERequestContext& ctx);
-    void SetApplicationArea(Kernel::HLERequestContext& ctx);
-    void Flush(Kernel::HLERequestContext& ctx);
-    void CreateApplicationArea(Kernel::HLERequestContext& ctx);
-    void GetTagInfo(Kernel::HLERequestContext& ctx);
-    void GetRegisterInfo(Kernel::HLERequestContext& ctx);
-    void GetCommonInfo(Kernel::HLERequestContext& ctx);
-    void GetModelInfo(Kernel::HLERequestContext& ctx);
-    void AttachActivateEvent(Kernel::HLERequestContext& ctx);
-    void AttachDeactivateEvent(Kernel::HLERequestContext& ctx);
-    void GetState(Kernel::HLERequestContext& ctx);
-    void GetDeviceState(Kernel::HLERequestContext& ctx);
-    void GetNpadId(Kernel::HLERequestContext& ctx);
-    void GetApplicationAreaSize(Kernel::HLERequestContext& ctx);
-    void AttachAvailabilityChangeEvent(Kernel::HLERequestContext& ctx);
-    void RecreateApplicationArea(Kernel::HLERequestContext& ctx);
-
-    KernelHelpers::ServiceContext service_context;
-
-    // TODO(german77): We should have a vector of interfaces
-    Module::Interface& nfp_interface;
-
-    State state{State::NonInitialized};
-    Kernel::KEvent* availability_change_event;
-};
 
 void InstallInterfaces(SM::ServiceManager& service_manager, Core::System& system);
 

src/core/hle/service/nfp/nfp_device.cpp

@@ -0,0 +1,572 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <array>
+#include <atomic>
+
+#include "common/fs/file.h"
+#include "common/fs/path_util.h"
+#include "common/input.h"
+#include "common/logging/log.h"
+#include "common/string_util.h"
+#include "common/tiny_mt.h"
+#include "core/core.h"
+#include "core/hid/emulated_controller.h"
+#include "core/hid/hid_core.h"
+#include "core/hid/hid_types.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/k_event.h"
+#include "core/hle/service/mii/mii_manager.h"
+#include "core/hle/service/nfp/amiibo_crypto.h"
+#include "core/hle/service/nfp/nfp.h"
+#include "core/hle/service/nfp/nfp_device.h"
+#include "core/hle/service/nfp/nfp_result.h"
+#include "core/hle/service/nfp/nfp_user.h"
+
+namespace Service::NFP {
+NfpDevice::NfpDevice(Core::HID::NpadIdType npad_id_, Core::System& system_,
+                     KernelHelpers::ServiceContext& service_context_,
+                     Kernel::KEvent* availability_change_event_)
+    : npad_id{npad_id_}, system{system_}, service_context{service_context_},
+      availability_change_event{availability_change_event_} {
+    activate_event = service_context.CreateEvent("IUser:NFPActivateEvent");
+    deactivate_event = service_context.CreateEvent("IUser:NFPDeactivateEvent");
+    npad_device = system.HIDCore().GetEmulatedController(npad_id);
+
+    Core::HID::ControllerUpdateCallback engine_callback{
+        .on_change = [this](Core::HID::ControllerTriggerType type) { NpadUpdate(type); },
+        .is_npad_service = false,
+    };
+    is_controller_set = true;
+    callback_key = npad_device->SetCallback(engine_callback);
+}
+
+NfpDevice::~NfpDevice() {
+    if (is_controller_set) {
+        npad_device->DeleteCallback(callback_key);
+        is_controller_set = false;
+    }
+};
+
+void NfpDevice::NpadUpdate(Core::HID::ControllerTriggerType type) {
+    if (type == Core::HID::ControllerTriggerType::Connected ||
+        type == Core::HID::ControllerTriggerType::Disconnected) {
+        availability_change_event->GetWritableEvent().Signal();
+        return;
+    }
+
+    if (type != Core::HID::ControllerTriggerType::Nfc) {
+        return;
+    }
+
+    if (!npad_device->IsConnected()) {
+        return;
+    }
+
+    const auto nfc_status = npad_device->GetNfc();
+    switch (nfc_status.state) {
+    case Common::Input::NfcState::NewAmiibo:
+        LoadAmiibo(nfc_status.data);
+        break;
+    case Common::Input::NfcState::AmiiboRemoved:
+        if (device_state != DeviceState::SearchingForTag) {
+            CloseAmiibo();
+        }
+        break;
+    default:
+        break;
+    }
+}
+
+bool NfpDevice::LoadAmiibo(const std::vector<u8>& data) {
+    if (device_state != DeviceState::SearchingForTag) {
+        LOG_ERROR(Service_NFP, "Game is not looking for amiibos, current state {}", device_state);
+        return false;
+    }
+
+    if (data.size() != sizeof(EncryptedNTAG215File)) {
+        LOG_ERROR(Service_NFP, "Not an amiibo, size={}", data.size());
+        return false;
+    }
+
+    memcpy(&encrypted_tag_data, data.data(), sizeof(EncryptedNTAG215File));
+
+    if (!AmiiboCrypto::IsAmiiboValid(encrypted_tag_data)) {
+        LOG_INFO(Service_NFP, "Invalid amiibo");
+        return false;
+    }
+
+    device_state = DeviceState::TagFound;
+    activate_event->GetWritableEvent().Signal();
+    return true;
+}
+
+void NfpDevice::CloseAmiibo() {
+    LOG_INFO(Service_NFP, "Remove amiibo");
+
+    if (device_state == DeviceState::TagMounted) {
+        Unmount();
+    }
+
+    device_state = DeviceState::TagRemoved;
+    encrypted_tag_data = {};
+    tag_data = {};
+    deactivate_event->GetWritableEvent().Signal();
+}
+
+Kernel::KReadableEvent& NfpDevice::GetActivateEvent() const {
+    return activate_event->GetReadableEvent();
+}
+
+Kernel::KReadableEvent& NfpDevice::GetDeactivateEvent() const {
+    return deactivate_event->GetReadableEvent();
+}
+
+void NfpDevice::Initialize() {
+    device_state = npad_device->HasNfc() ? DeviceState::Initialized : DeviceState::Unavailable;
+    encrypted_tag_data = {};
+    tag_data = {};
+}
+
+void NfpDevice::Finalize() {
+    if (device_state == DeviceState::TagMounted) {
+        Unmount();
+    }
+    if (device_state == DeviceState::SearchingForTag || device_state == DeviceState::TagRemoved) {
+        StopDetection();
+    }
+    device_state = DeviceState::Unavailable;
+}
+
+Result NfpDevice::StartDetection(s32 protocol_) {
+    // TODO(german77): Add callback for when nfc data is available
+
+    if (device_state == DeviceState::Initialized || device_state == DeviceState::TagRemoved) {
+        npad_device->SetPollingMode(Common::Input::PollingMode::NFC);
+        device_state = DeviceState::SearchingForTag;
+        protocol = protocol_;
+        return ResultSuccess;
+    }
+
+    LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+    return WrongDeviceState;
+}
+
+Result NfpDevice::StopDetection() {
+    npad_device->SetPollingMode(Common::Input::PollingMode::Active);
+
+    if (device_state == DeviceState::TagFound || device_state == DeviceState::TagMounted) {
+        CloseAmiibo();
+        return ResultSuccess;
+    }
+    if (device_state == DeviceState::SearchingForTag || device_state == DeviceState::TagRemoved) {
+        device_state = DeviceState::Initialized;
+        return ResultSuccess;
+    }
+
+    LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+    return WrongDeviceState;
+}
+
+Result NfpDevice::Flush() {
+    auto& settings = tag_data.settings;
+
+    if (settings.write_date.raw_date != settings.write_date.raw_date) {
+        // TODO: Read current system date
+        settings.write_date.SetYear(2022);
+        settings.write_date.SetMonth(9);
+        settings.write_date.SetDay(9);
+        settings.crc_counter++;
+        // TODO: Find how to calculate the crc check
+        // settings.crc = CalculateCRC(settings);
+    }
+
+    tag_data.write_counter++;
+
+    if (!AmiiboCrypto::EncodeAmiibo(tag_data, encrypted_tag_data)) {
+        LOG_ERROR(Service_NFP, "Failed to encode data");
+        return WriteAmiiboFailed;
+    }
+
+    std::vector<u8> data(sizeof(encrypted_tag_data));
+    memcpy(data.data(), &encrypted_tag_data, sizeof(encrypted_tag_data));
+
+    if (!npad_device->WriteNfc(data)) {
+        LOG_ERROR(Service_NFP, "Error writing to file");
+        return WriteAmiiboFailed;
+    }
+
+    is_data_moddified = false;
+
+    return ResultSuccess;
+}
+
+Result NfpDevice::Mount() {
+    if (device_state != DeviceState::TagFound) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        return WrongDeviceState;
+    }
+
+    if (!AmiiboCrypto::DecodeAmiibo(encrypted_tag_data, tag_data)) {
+        LOG_ERROR(Service_NFP, "Can't decode amiibo {}", device_state);
+        return CorruptedData;
+    }
+
+    device_state = DeviceState::TagMounted;
+    return ResultSuccess;
+}
+
+Result NfpDevice::Unmount() {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        return WrongDeviceState;
+    }
+
+    // Save data before unloading the amiibo
+    if (is_data_moddified) {
+        Flush();
+    }
+
+    device_state = DeviceState::TagFound;
+    return ResultSuccess;
+}
+
+Result NfpDevice::GetTagInfo(TagInfo& tag_info) const {
+    if (device_state != DeviceState::TagFound && device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        return WrongDeviceState;
+    }
+
+    tag_info = {
+        .uuid = encrypted_tag_data.uuid,
+        .uuid_length = static_cast<u8>(encrypted_tag_data.uuid.size()),
+        .protocol = protocol,
+        .tag_type = static_cast<u32>(encrypted_tag_data.user_memory.model_info.amiibo_type),
+    };
+
+    return ResultSuccess;
+}
+
+Result NfpDevice::GetCommonInfo(CommonInfo& common_info) const {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        return WrongDeviceState;
+    }
+
+    const auto& settings = tag_data.settings;
+    const u32 application_area_size =
+        tag_data.settings.settings.appdata_initialized == 0 ? 0 : sizeof(ApplicationArea);
+
+    // TODO: Validate this data
+    common_info = {
+        .last_write_date =
+            {
+                settings.write_date.GetYear(),
+                settings.write_date.GetMonth(),
+                settings.write_date.GetDay(),
+            },
+        .write_counter = tag_data.write_counter,
+        .version = 1,
+        .application_area_size = application_area_size,
+    };
+    return ResultSuccess;
+}
+
+Result NfpDevice::GetModelInfo(ModelInfo& model_info) const {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        return WrongDeviceState;
+    }
+
+    const auto& model_info_data = encrypted_tag_data.user_memory.model_info;
+    model_info = {
+        .character_id = model_info_data.character_id,
+        .character_variant = model_info_data.character_variant,
+        .amiibo_type = model_info_data.amiibo_type,
+        .model_number = model_info_data.model_number,
+        .series = model_info_data.series,
+    };
+    return ResultSuccess;
+}
+
+Result NfpDevice::GetRegisterInfo(RegisterInfo& register_info) const {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return TagRemoved;
+        }
+        return WrongDeviceState;
+    }
+
+    if (tag_data.settings.settings.amiibo_initialized == 0) {
+        return RegistrationIsNotInitialized;
+    }
+
+    Service::Mii::MiiManager manager;
+    const auto& settings = tag_data.settings;
+
+    // TODO: Validate this data
+    register_info = {
+        .mii_char_info = manager.ConvertV3ToCharInfo(tag_data.owner_mii),
+        .creation_date =
+            {
+                settings.init_date.GetYear(),
+                settings.init_date.GetMonth(),
+                settings.init_date.GetDay(),
+            },
+        .amiibo_name = GetAmiiboName(settings),
+        .font_region = {},
+    };
+
+    return ResultSuccess;
+}
+
+Result NfpDevice::SetNicknameAndOwner(const AmiiboName& amiibo_name) {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return TagRemoved;
+        }
+        return WrongDeviceState;
+    }
+
+    Service::Mii::MiiManager manager;
+    auto& settings = tag_data.settings;
+
+    // TODO: Read current system date
+    settings.init_date.SetYear(2022);
+    settings.init_date.SetMonth(9);
+    settings.init_date.SetDay(9);
+    settings.write_date.SetYear(2022);
+    settings.write_date.SetMonth(9);
+    settings.write_date.SetDay(9);
+    settings.crc_counter++;
+    // TODO: Find how to calculate the crc check
+    // settings.crc = CalculateCRC(settings);
+
+    SetAmiiboName(settings, amiibo_name);
+    tag_data.owner_mii = manager.ConvertCharInfoToV3(manager.BuildDefault(0));
+    settings.settings.amiibo_initialized.Assign(1);
+
+    return Flush();
+}
+
+Result NfpDevice::RestoreAmiibo() {
+    // TODO: Load amiibo from backup on system
+    LOG_ERROR(Service_NFP, "Not Implemented");
+    return ResultSuccess;
+}
+
+Result NfpDevice::DeleteAllData() {
+    const auto result = DeleteApplicationArea();
+    if (result.IsError()) {
+        return result;
+    }
+
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return TagRemoved;
+        }
+        return WrongDeviceState;
+    }
+
+    Common::TinyMT rng{};
+    rng.GenerateRandomBytes(&tag_data.owner_mii, sizeof(tag_data.owner_mii));
+    tag_data.settings.settings.amiibo_initialized.Assign(0);
+
+    return Flush();
+}
+
+Result NfpDevice::OpenApplicationArea(u32 access_id) {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return TagRemoved;
+        }
+        return WrongDeviceState;
+    }
+
+    if (tag_data.settings.settings.appdata_initialized.Value() == 0) {
+        LOG_WARNING(Service_NFP, "Application area is not initialized");
+        return ApplicationAreaIsNotInitialized;
+    }
+
+    if (tag_data.application_area_id != access_id) {
+        LOG_WARNING(Service_NFP, "Wrong application area id");
+        return WrongApplicationAreaId;
+    }
+
+    return ResultSuccess;
+}
+
+Result NfpDevice::GetApplicationArea(std::vector<u8>& data) const {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return TagRemoved;
+        }
+        return WrongDeviceState;
+    }
+
+    if (tag_data.settings.settings.appdata_initialized.Value() == 0) {
+        LOG_ERROR(Service_NFP, "Application area is not initialized");
+        return ApplicationAreaIsNotInitialized;
+    }
+
+    if (data.size() > sizeof(ApplicationArea)) {
+        LOG_ERROR(Service_NFP, "Wrong data size {}", data.size());
+        return ResultUnknown;
+    }
+
+    memcpy(data.data(), tag_data.application_area.data(), data.size());
+
+    return ResultSuccess;
+}
+
+Result NfpDevice::SetApplicationArea(const std::vector<u8>& data) {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return TagRemoved;
+        }
+        return WrongDeviceState;
+    }
+
+    if (tag_data.settings.settings.appdata_initialized.Value() == 0) {
+        LOG_ERROR(Service_NFP, "Application area is not initialized");
+        return ApplicationAreaIsNotInitialized;
+    }
+
+    if (data.size() > sizeof(ApplicationArea)) {
+        LOG_ERROR(Service_NFP, "Wrong data size {}", data.size());
+        return ResultUnknown;
+    }
+
+    Common::TinyMT rng{};
+    rng.GenerateRandomBytes(tag_data.application_area.data(), sizeof(ApplicationArea));
+    std::memcpy(tag_data.application_area.data(), data.data(), data.size());
+
+    tag_data.applicaton_write_counter++;
+    is_data_moddified = true;
+
+    return ResultSuccess;
+}
+
+Result NfpDevice::CreateApplicationArea(u32 access_id, const std::vector<u8>& data) {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return TagRemoved;
+        }
+        return WrongDeviceState;
+    }
+
+    if (tag_data.settings.settings.appdata_initialized.Value() != 0) {
+        LOG_ERROR(Service_NFP, "Application area already exist");
+        return ApplicationAreaExist;
+    }
+
+    return RecreateApplicationArea(access_id, data);
+}
+
+Result NfpDevice::RecreateApplicationArea(u32 access_id, const std::vector<u8>& data) {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return TagRemoved;
+        }
+        return WrongDeviceState;
+    }
+
+    if (data.size() > sizeof(ApplicationArea)) {
+        LOG_ERROR(Service_NFP, "Wrong data size {}", data.size());
+        return ResultUnknown;
+    }
+
+    Common::TinyMT rng{};
+    std::memcpy(tag_data.application_area.data(), data.data(), data.size());
+    // HW seems to fill excess data with garbage
+    rng.GenerateRandomBytes(tag_data.application_area.data() + data.size(),
+                            sizeof(ApplicationArea) - data.size());
+
+    // TODO: Investigate why the title id needs to be moddified
+    tag_data.title_id = system.GetCurrentProcessProgramID();
+    tag_data.title_id = tag_data.title_id | 0x30000000ULL;
+    tag_data.settings.settings.appdata_initialized.Assign(1);
+    tag_data.application_area_id = access_id;
+    tag_data.applicaton_write_counter++;
+    tag_data.unknown = {};
+
+    return Flush();
+}
+
+Result NfpDevice::DeleteApplicationArea() {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return TagRemoved;
+        }
+        return WrongDeviceState;
+    }
+
+    Common::TinyMT rng{};
+    rng.GenerateRandomBytes(tag_data.application_area.data(), sizeof(ApplicationArea));
+    rng.GenerateRandomBytes(&tag_data.title_id, sizeof(u64));
+    rng.GenerateRandomBytes(&tag_data.application_area_id, sizeof(u32));
+    tag_data.settings.settings.appdata_initialized.Assign(0);
+    tag_data.applicaton_write_counter++;
+    tag_data.unknown = {};
+
+    return Flush();
+}
+
+u64 NfpDevice::GetHandle() const {
+    // Generate a handle based of the npad id
+    return static_cast<u64>(npad_id);
+}
+
+u32 NfpDevice::GetApplicationAreaSize() const {
+    // Investigate if this value is really constant
+    return sizeof(ApplicationArea);
+}
+
+DeviceState NfpDevice::GetCurrentState() const {
+    return device_state;
+}
+
+Core::HID::NpadIdType NfpDevice::GetNpadId() const {
+    return npad_id;
+}
+
+AmiiboName NfpDevice::GetAmiiboName(const AmiiboSettings& settings) const {
+    std::array<char16_t, amiibo_name_length> settings_amiibo_name{};
+    AmiiboName amiibo_name{};
+
+    // Convert from big endian to little endian
+    for (std::size_t i = 0; i < amiibo_name_length; i++) {
+        settings_amiibo_name[i] = static_cast<u16>(settings.amiibo_name[i]);
+    }
+
+    // Convert from utf16 to utf8
+    const auto amiibo_name_utf8 = Common::UTF16ToUTF8(settings_amiibo_name.data());
+    memcpy(amiibo_name.data(), amiibo_name_utf8.data(), amiibo_name_utf8.size());
+
+    return amiibo_name;
+}
+
+void NfpDevice::SetAmiiboName(AmiiboSettings& settings, const AmiiboName& amiibo_name) {
+    std::array<char16_t, amiibo_name_length> settings_amiibo_name{};
+
+    // Convert from utf8 to utf16
+    const auto amiibo_name_utf16 = Common::UTF8ToUTF16(amiibo_name.data());
+    memcpy(settings_amiibo_name.data(), amiibo_name_utf16.data(),
+           amiibo_name_utf16.size() * sizeof(char16_t));
+
+    // Convert from little endian to big endian
+    for (std::size_t i = 0; i < amiibo_name_length; i++) {
+        settings.amiibo_name[i] = static_cast<u16_be>(settings_amiibo_name[i]);
+    }
+}
+
+} // namespace Service::NFP

src/core/hle/service/nfp/nfp_device.h

@@ -0,0 +1,97 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <array>
+#include <vector>
+
+#include "common/common_funcs.h"
+#include "core/hle/service/kernel_helpers.h"
+#include "core/hle/service/mii/types.h"
+#include "core/hle/service/nfp/nfp_types.h"
+#include "core/hle/service/service.h"
+
+namespace Kernel {
+class KEvent;
+class KReadableEvent;
+} // namespace Kernel
+
+namespace Core {
+class System;
+} // namespace Core
+
+namespace Core::HID {
+class EmulatedController;
+enum class ControllerTriggerType;
+enum class NpadIdType : u32;
+} // namespace Core::HID
+
+namespace Service::NFP {
+class NfpDevice {
+public:
+    NfpDevice(Core::HID::NpadIdType npad_id_, Core::System& system_,
+              KernelHelpers::ServiceContext& service_context_,
+              Kernel::KEvent* availability_change_event_);
+    ~NfpDevice();
+
+    void Initialize();
+    void Finalize();
+
+    Result StartDetection(s32 protocol_);
+    Result StopDetection();
+    Result Mount();
+    Result Unmount();
+    Result Flush();
+
+    Result GetTagInfo(TagInfo& tag_info) const;
+    Result GetCommonInfo(CommonInfo& common_info) const;
+    Result GetModelInfo(ModelInfo& model_info) const;
+    Result GetRegisterInfo(RegisterInfo& register_info) const;
+
+    Result SetNicknameAndOwner(const AmiiboName& amiibo_name);
+    Result RestoreAmiibo();
+    Result DeleteAllData();
+
+    Result OpenApplicationArea(u32 access_id);
+    Result GetApplicationArea(std::vector<u8>& data) const;
+    Result SetApplicationArea(const std::vector<u8>& data);
+    Result CreateApplicationArea(u32 access_id, const std::vector<u8>& data);
+    Result RecreateApplicationArea(u32 access_id, const std::vector<u8>& data);
+    Result DeleteApplicationArea();
+
+    u64 GetHandle() const;
+    u32 GetApplicationAreaSize() const;
+    DeviceState GetCurrentState() const;
+    Core::HID::NpadIdType GetNpadId() const;
+
+    Kernel::KReadableEvent& GetActivateEvent() const;
+    Kernel::KReadableEvent& GetDeactivateEvent() const;
+
+private:
+    void NpadUpdate(Core::HID::ControllerTriggerType type);
+    bool LoadAmiibo(const std::vector<u8>& data);
+    void CloseAmiibo();
+
+    AmiiboName GetAmiiboName(const AmiiboSettings& settings) const;
+    void SetAmiiboName(AmiiboSettings& settings, const AmiiboName& amiibo_name);
+
+    bool is_controller_set{};
+    int callback_key;
+    const Core::HID::NpadIdType npad_id;
+    Core::System& system;
+    Core::HID::EmulatedController* npad_device = nullptr;
+    KernelHelpers::ServiceContext& service_context;
+    Kernel::KEvent* activate_event = nullptr;
+    Kernel::KEvent* deactivate_event = nullptr;
+    Kernel::KEvent* availability_change_event = nullptr;
+
+    bool is_data_moddified{};
+    s32 protocol{};
+    DeviceState device_state{DeviceState::Unavailable};
+
+    NTAG215File tag_data{};
+    EncryptedNTAG215File encrypted_tag_data{};
+};
+
+} // namespace Service::NFP

src/core/hle/service/nfp/nfp_result.h

@@ -0,0 +1,21 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include "core/hle/result.h"
+
+namespace Service::NFP {
+
+constexpr Result DeviceNotFound(ErrorModule::NFP, 64);
+constexpr Result WrongDeviceState(ErrorModule::NFP, 73);
+constexpr Result NfcDisabled(ErrorModule::NFP, 80);
+constexpr Result WriteAmiiboFailed(ErrorModule::NFP, 88);
+constexpr Result TagRemoved(ErrorModule::NFP, 97);
+constexpr Result RegistrationIsNotInitialized(ErrorModule::NFP, 120);
+constexpr Result ApplicationAreaIsNotInitialized(ErrorModule::NFP, 128);
+constexpr Result CorruptedData(ErrorModule::NFP, 144);
+constexpr Result WrongApplicationAreaId(ErrorModule::NFP, 152);
+constexpr Result ApplicationAreaExist(ErrorModule::NFP, 168);
+
+} // namespace Service::NFP

src/core/hle/service/nfp/amiibo_types.h → src/core/hle/service/nfp/nfp_types.h

@@ -27,7 +27,7 @@ enum class DeviceState : u32 {
     TagFound,
     TagRemoved,
     TagMounted,
-    Unaviable,
+    Unavailable,
     Finalized,
 };
 
@@ -36,6 +36,7 @@ enum class ModelType : u32 {
 };
 
 enum class MountTarget : u32 {
+    None,
     Rom,
     Ram,
     All,
@@ -76,18 +77,36 @@ enum class AmiiboSeries : u8 {
 using TagUuid = std::array<u8, 10>;
 using HashData = std::array<u8, 0x20>;
 using ApplicationArea = std::array<u8, 0xD8>;
+using AmiiboName = std::array<char, (amiibo_name_length * 4) + 1>;
 
 struct AmiiboDate {
-    u16 raw_date{};
+    u16_be raw_date{};
+
+    u16 DateRaw() const {
+        return static_cast<u16>(raw_date);
+    }
 
     u16 GetYear() const {
-        return static_cast<u16>(((raw_date & 0xFE00) >> 9) + 2000);
+        return static_cast<u16>(((DateRaw() & 0xFE00) >> 9) + 2000);
     }
     u8 GetMonth() const {
-        return static_cast<u8>(((raw_date & 0x01E0) >> 5) - 1);
+        return static_cast<u8>(((DateRaw() & 0x01E0) >> 5) - 1);
     }
     u8 GetDay() const {
-        return static_cast<u8>(raw_date & 0x001F);
+        return static_cast<u8>(DateRaw() & 0x001F);
+    }
+
+    void SetYear(u16 year) {
+        raw_date = DateRaw() & ~0xFE00;
+        raw_date |= static_cast<u16_be>((year - 2000) << 9);
+    }
+    void SetMonth(u8 month) {
+        raw_date = DateRaw() & ~0x01E0;
+        raw_date |= static_cast<u16_be>((month + 1) << 5);
+    }
+    void SetDay(u8 day) {
+        raw_date = DateRaw() & ~0x001F;
+        raw_date |= static_cast<u16_be>(day);
     }
 };
 static_assert(sizeof(AmiiboDate) == 2, "AmiiboDate is an invalid size");
@@ -134,7 +153,7 @@ static_assert(sizeof(NTAG215Password) == 0x8, "NTAG215Password is an invalid siz
 #pragma pack(1)
 struct EncryptedAmiiboFile {
     u8 constant_value;                     // Must be A5
-    u16 write_counter;                     // Number of times the amiibo has been written?
+    u16_be write_counter;                  // Number of times the amiibo has been written?
     INSERT_PADDING_BYTES(0x1);             // Unknown 1
     AmiiboSettings settings;               // Encrypted amiibo settings
     HashData hmac_tag;                     // Hash
@@ -157,7 +176,7 @@ struct NTAG215File {
     u32 compability_container; // Defines available memory
     HashData hmac_data;        // Hash
     u8 constant_value;         // Must be A5
-    u16 write_counter;         // Number of times the amiibo has been written?
+    u16_be write_counter;      // Number of times the amiibo has been written?
     INSERT_PADDING_BYTES(0x1); // Unknown 1
     AmiiboSettings settings;
     Service::Mii::Ver3StoreData owner_mii; // Encrypted Mii data
@@ -194,4 +213,50 @@ static_assert(sizeof(EncryptedNTAG215File) == 0x21C, "EncryptedNTAG215File is an
 static_assert(std::is_trivially_copyable_v<EncryptedNTAG215File>,
               "EncryptedNTAG215File must be trivially copyable.");
 
+struct TagInfo {
+    TagUuid uuid;
+    u8 uuid_length;
+    INSERT_PADDING_BYTES(0x15);
+    s32 protocol;
+    u32 tag_type;
+    INSERT_PADDING_BYTES(0x30);
+};
+static_assert(sizeof(TagInfo) == 0x58, "TagInfo is an invalid size");
+
+struct WriteDate {
+    u16 year;
+    u8 month;
+    u8 day;
+};
+static_assert(sizeof(WriteDate) == 0x4, "WriteDate is an invalid size");
+
+struct CommonInfo {
+    WriteDate last_write_date;
+    u16 write_counter;
+    u8 version;
+    INSERT_PADDING_BYTES(0x1);
+    u32 application_area_size;
+    INSERT_PADDING_BYTES(0x34);
+};
+static_assert(sizeof(CommonInfo) == 0x40, "CommonInfo is an invalid size");
+
+struct ModelInfo {
+    u16 character_id;
+    u8 character_variant;
+    AmiiboType amiibo_type;
+    u16 model_number;
+    AmiiboSeries series;
+    INSERT_PADDING_BYTES(0x39); // Unknown
+};
+static_assert(sizeof(ModelInfo) == 0x40, "ModelInfo is an invalid size");
+
+struct RegisterInfo {
+    Service::Mii::CharInfo mii_char_info;
+    WriteDate creation_date;
+    AmiiboName amiibo_name;
+    u8 font_region;
+    INSERT_PADDING_BYTES(0x7A);
+};
+static_assert(sizeof(RegisterInfo) == 0x100, "RegisterInfo is an invalid size");
+
 } // namespace Service::NFP

src/core/hle/service/nfp/nfp_user.cpp

@@ -1,18 +1,644 @@
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#include <array>
+#include <atomic>
+
+#include "common/logging/log.h"
+#include "core/core.h"
+#include "core/hid/emulated_controller.h"
+#include "core/hid/hid_core.h"
+#include "core/hid/hid_types.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/k_event.h"
+#include "core/hle/service/mii/mii_manager.h"
+#include "core/hle/service/nfp/nfp_device.h"
+#include "core/hle/service/nfp/nfp_result.h"
 #include "core/hle/service/nfp/nfp_user.h"
 
 namespace Service::NFP {
 
-NFP_User::NFP_User(std::shared_ptr<Module> module_, Core::System& system_)
-    : Interface(std::move(module_), system_, "nfp:user") {
+IUser::IUser(Core::System& system_)
+    : ServiceFramework{system_, "NFP::IUser"}, service_context{system_, service_name} {
     static const FunctionInfo functions[] = {
-        {0, &NFP_User::CreateUserInterface, "CreateUserInterface"},
+        {0, &IUser::Initialize, "Initialize"},
+        {1, &IUser::Finalize, "Finalize"},
+        {2, &IUser::ListDevices, "ListDevices"},
+        {3, &IUser::StartDetection, "StartDetection"},
+        {4, &IUser::StopDetection, "StopDetection"},
+        {5, &IUser::Mount, "Mount"},
+        {6, &IUser::Unmount, "Unmount"},
+        {7, &IUser::OpenApplicationArea, "OpenApplicationArea"},
+        {8, &IUser::GetApplicationArea, "GetApplicationArea"},
+        {9, &IUser::SetApplicationArea, "SetApplicationArea"},
+        {10, &IUser::Flush, "Flush"},
+        {11, &IUser::Restore, "Restore"},
+        {12, &IUser::CreateApplicationArea, "CreateApplicationArea"},
+        {13, &IUser::GetTagInfo, "GetTagInfo"},
+        {14, &IUser::GetRegisterInfo, "GetRegisterInfo"},
+        {15, &IUser::GetCommonInfo, "GetCommonInfo"},
+        {16, &IUser::GetModelInfo, "GetModelInfo"},
+        {17, &IUser::AttachActivateEvent, "AttachActivateEvent"},
+        {18, &IUser::AttachDeactivateEvent, "AttachDeactivateEvent"},
+        {19, &IUser::GetState, "GetState"},
+        {20, &IUser::GetDeviceState, "GetDeviceState"},
+        {21, &IUser::GetNpadId, "GetNpadId"},
+        {22, &IUser::GetApplicationAreaSize, "GetApplicationAreaSize"},
+        {23, &IUser::AttachAvailabilityChangeEvent, "AttachAvailabilityChangeEvent"},
+        {24, &IUser::RecreateApplicationArea, "RecreateApplicationArea"},
     };
     RegisterHandlers(functions);
+
+    availability_change_event = service_context.CreateEvent("IUser:AvailabilityChangeEvent");
+
+    for (u32 device_index = 0; device_index < 10; device_index++) {
+        devices[device_index] =
+            std::make_shared<NfpDevice>(Core::HID::IndexToNpadIdType(device_index), system,
+                                        service_context, availability_change_event);
+    }
+}
+
+void IUser::Initialize(Kernel::HLERequestContext& ctx) {
+    LOG_INFO(Service_NFC, "called");
+
+    state = State::Initialized;
+
+    for (auto& device : devices) {
+        device->Initialize();
+    }
+
+    IPC::ResponseBuilder rb{ctx, 2, 0};
+    rb.Push(ResultSuccess);
+}
+
+void IUser::Finalize(Kernel::HLERequestContext& ctx) {
+    LOG_INFO(Service_NFP, "called");
+
+    state = State::NonInitialized;
+
+    for (auto& device : devices) {
+        device->Finalize();
+    }
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultSuccess);
+}
+
+void IUser::ListDevices(Kernel::HLERequestContext& ctx) {
+    LOG_INFO(Service_NFP, "called");
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    std::vector<u64> nfp_devices;
+    const std::size_t max_allowed_devices = ctx.GetWriteBufferSize() / sizeof(u64);
+
+    for (auto& device : devices) {
+        if (nfp_devices.size() >= max_allowed_devices) {
+            continue;
+        }
+        if (device->GetCurrentState() != DeviceState::Unavailable) {
+            nfp_devices.push_back(device->GetHandle());
+        }
+    }
+
+    if (nfp_devices.size() == 0) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    ctx.WriteBuffer(nfp_devices);
+
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(ResultSuccess);
+    rb.Push(static_cast<s32>(nfp_devices.size()));
+}
+
+void IUser::StartDetection(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    const auto nfp_protocol{rp.Pop<s32>()};
+    LOG_INFO(Service_NFP, "called, device_handle={}, nfp_protocol={}", device_handle, nfp_protocol);
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    const auto result = device.value()->StartDetection(nfp_protocol);
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(result);
+}
+
+void IUser::StopDetection(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    LOG_INFO(Service_NFP, "called, device_handle={}", device_handle);
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    const auto result = device.value()->StopDetection();
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(result);
+}
+
+void IUser::Mount(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    const auto model_type{rp.PopEnum<ModelType>()};
+    const auto mount_target{rp.PopEnum<MountTarget>()};
+    LOG_INFO(Service_NFP, "called, device_handle={}, model_type={}, mount_target={}", device_handle,
+             model_type, mount_target);
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    const auto result = device.value()->Mount();
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(result);
+}
+
+void IUser::Unmount(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    LOG_INFO(Service_NFP, "called, device_handle={}", device_handle);
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    const auto result = device.value()->Unmount();
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(result);
 }
 
-NFP_User::~NFP_User() = default;
+void IUser::OpenApplicationArea(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    const auto access_id{rp.Pop<u32>()};
+    LOG_INFO(Service_NFP, "called, device_handle={}, access_id={}", device_handle, access_id);
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    const auto result = device.value()->OpenApplicationArea(access_id);
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(result);
+}
+
+void IUser::GetApplicationArea(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    const auto data_size = ctx.GetWriteBufferSize();
+    LOG_INFO(Service_NFP, "called, device_handle={}", device_handle);
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    std::vector<u8> data(data_size);
+    const auto result = device.value()->GetApplicationArea(data);
+    ctx.WriteBuffer(data);
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(result);
+    rb.Push(static_cast<u32>(data_size));
+}
+
+void IUser::SetApplicationArea(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    const auto data{ctx.ReadBuffer()};
+    LOG_INFO(Service_NFP, "called, device_handle={}, data_size={}", device_handle, data.size());
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    const auto result = device.value()->SetApplicationArea(data);
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(result);
+}
+
+void IUser::Flush(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    LOG_INFO(Service_NFP, "called, device_handle={}", device_handle);
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    const auto result = device.value()->Flush();
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(result);
+}
+
+void IUser::Restore(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    LOG_WARNING(Service_NFP, "(STUBBED) called, device_handle={}", device_handle);
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    const auto result = device.value()->RestoreAmiibo();
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(result);
+}
+
+void IUser::CreateApplicationArea(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    const auto access_id{rp.Pop<u32>()};
+    const auto data{ctx.ReadBuffer()};
+    LOG_INFO(Service_NFP, "called, device_handle={}, data_size={}, access_id={}", device_handle,
+             access_id, data.size());
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    const auto result = device.value()->CreateApplicationArea(access_id, data);
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(result);
+}
+
+void IUser::GetTagInfo(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    LOG_INFO(Service_NFP, "called, device_handle={}", device_handle);
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    TagInfo tag_info{};
+    const auto result = device.value()->GetTagInfo(tag_info);
+    ctx.WriteBuffer(tag_info);
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(result);
+}
+
+void IUser::GetRegisterInfo(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    LOG_INFO(Service_NFP, "called, device_handle={}", device_handle);
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    RegisterInfo register_info{};
+    const auto result = device.value()->GetRegisterInfo(register_info);
+    ctx.WriteBuffer(register_info);
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(result);
+}
+
+void IUser::GetCommonInfo(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    LOG_INFO(Service_NFP, "called, device_handle={}", device_handle);
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    CommonInfo common_info{};
+    const auto result = device.value()->GetCommonInfo(common_info);
+    ctx.WriteBuffer(common_info);
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(result);
+}
+
+void IUser::GetModelInfo(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    LOG_INFO(Service_NFP, "called, device_handle={}", device_handle);
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    ModelInfo model_info{};
+    const auto result = device.value()->GetModelInfo(model_info);
+    ctx.WriteBuffer(model_info);
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(result);
+}
+
+void IUser::AttachActivateEvent(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    LOG_DEBUG(Service_NFP, "called, device_handle={}", device_handle);
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    IPC::ResponseBuilder rb{ctx, 2, 1};
+    rb.Push(ResultSuccess);
+    rb.PushCopyObjects(device.value()->GetActivateEvent());
+}
+
+void IUser::AttachDeactivateEvent(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    LOG_DEBUG(Service_NFP, "called, device_handle={}", device_handle);
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    IPC::ResponseBuilder rb{ctx, 2, 1};
+    rb.Push(ResultSuccess);
+    rb.PushCopyObjects(device.value()->GetDeactivateEvent());
+}
+
+void IUser::GetState(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_NFC, "called");
+
+    IPC::ResponseBuilder rb{ctx, 3, 0};
+    rb.Push(ResultSuccess);
+    rb.PushEnum(state);
+}
+
+void IUser::GetDeviceState(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    LOG_DEBUG(Service_NFP, "called, device_handle={}", device_handle);
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(ResultSuccess);
+    rb.PushEnum(device.value()->GetCurrentState());
+}
+
+void IUser::GetNpadId(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    LOG_DEBUG(Service_NFP, "called, device_handle={}", device_handle);
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(ResultSuccess);
+    rb.PushEnum(device.value()->GetNpadId());
+}
+
+void IUser::GetApplicationAreaSize(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    LOG_DEBUG(Service_NFP, "called, device_handle={}", device_handle);
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(ResultSuccess);
+    rb.Push(device.value()->GetApplicationAreaSize());
+}
+
+void IUser::AttachAvailabilityChangeEvent(Kernel::HLERequestContext& ctx) {
+    LOG_INFO(Service_NFP, "called");
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    IPC::ResponseBuilder rb{ctx, 2, 1};
+    rb.Push(ResultSuccess);
+    rb.PushCopyObjects(availability_change_event->GetReadableEvent());
+}
+
+void IUser::RecreateApplicationArea(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto device_handle{rp.Pop<u64>()};
+    const auto access_id{rp.Pop<u32>()};
+    const auto data{ctx.ReadBuffer()};
+    LOG_INFO(Service_NFP, "called, device_handle={}, data_size={}, access_id={}", device_handle,
+             access_id, data.size());
+
+    if (state == State::NonInitialized) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(NfcDisabled);
+        return;
+    }
+
+    auto device = GetNfpDevice(device_handle);
+
+    if (!device.has_value()) {
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(DeviceNotFound);
+        return;
+    }
+
+    const auto result = device.value()->RecreateApplicationArea(access_id, data);
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(result);
+}
+
+std::optional<std::shared_ptr<NfpDevice>> IUser::GetNfpDevice(u64 handle) {
+    for (auto& device : devices) {
+        if (device->GetHandle() == handle) {
+            return device;
+        }
+    }
+    return std::nullopt;
+}
 
 } // namespace Service::NFP

src/core/hle/service/nfp/nfp_user.h

@@ -3,14 +3,52 @@
 
 #pragma once
 
+#include "core/hle/service/kernel_helpers.h"
 #include "core/hle/service/nfp/nfp.h"
+#include "core/hle/service/nfp/nfp_types.h"
 
 namespace Service::NFP {
+class NfpDevice;
 
-class NFP_User final : public Module::Interface {
+class IUser final : public ServiceFramework<IUser> {
 public:
-    explicit NFP_User(std::shared_ptr<Module> module_, Core::System& system_);
-    ~NFP_User() override;
+    explicit IUser(Core::System& system_);
+
+private:
+    void Initialize(Kernel::HLERequestContext& ctx);
+    void Finalize(Kernel::HLERequestContext& ctx);
+    void ListDevices(Kernel::HLERequestContext& ctx);
+    void StartDetection(Kernel::HLERequestContext& ctx);
+    void StopDetection(Kernel::HLERequestContext& ctx);
+    void Mount(Kernel::HLERequestContext& ctx);
+    void Unmount(Kernel::HLERequestContext& ctx);
+    void OpenApplicationArea(Kernel::HLERequestContext& ctx);
+    void GetApplicationArea(Kernel::HLERequestContext& ctx);
+    void SetApplicationArea(Kernel::HLERequestContext& ctx);
+    void Flush(Kernel::HLERequestContext& ctx);
+    void Restore(Kernel::HLERequestContext& ctx);
+    void CreateApplicationArea(Kernel::HLERequestContext& ctx);
+    void GetTagInfo(Kernel::HLERequestContext& ctx);
+    void GetRegisterInfo(Kernel::HLERequestContext& ctx);
+    void GetCommonInfo(Kernel::HLERequestContext& ctx);
+    void GetModelInfo(Kernel::HLERequestContext& ctx);
+    void AttachActivateEvent(Kernel::HLERequestContext& ctx);
+    void AttachDeactivateEvent(Kernel::HLERequestContext& ctx);
+    void GetState(Kernel::HLERequestContext& ctx);
+    void GetDeviceState(Kernel::HLERequestContext& ctx);
+    void GetNpadId(Kernel::HLERequestContext& ctx);
+    void GetApplicationAreaSize(Kernel::HLERequestContext& ctx);
+    void AttachAvailabilityChangeEvent(Kernel::HLERequestContext& ctx);
+    void RecreateApplicationArea(Kernel::HLERequestContext& ctx);
+
+    std::optional<std::shared_ptr<NfpDevice>> GetNfpDevice(u64 handle);
+
+    KernelHelpers::ServiceContext service_context;
+
+    std::array<std::shared_ptr<NfpDevice>, 10> devices{};
+
+    State state{State::NonInitialized};
+    Kernel::KEvent* availability_change_event;
 };
 
 } // namespace Service::NFP