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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "common/input.h"
#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/nfc/nfc_device.h"
#include "core/hle/service/nfc/nfc_result.h"
#include "core/hle/service/nfc/nfc_user.h"
namespace Service::NFC {
NfcDevice::NfcDevice(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:NFCActivateEvent");
deactivate_event = service_context.CreateEvent("IUser:NFCDeactivateEvent");
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);
}
NfcDevice::~NfcDevice() {
activate_event->Close();
deactivate_event->Close();
if (!is_controller_set) {
return;
}
npad_device->DeleteCallback(callback_key);
is_controller_set = false;
};
void NfcDevice::NpadUpdate(Core::HID::ControllerTriggerType type) {
if (type == Core::HID::ControllerTriggerType::Connected ||
type == Core::HID::ControllerTriggerType::Disconnected) {
availability_change_event->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:
LoadNfcTag(nfc_status.data);
break;
case Common::Input::NfcState::AmiiboRemoved:
if (device_state != NFP::DeviceState::SearchingForTag) {
CloseNfcTag();
}
break;
default:
break;
}
}
bool NfcDevice::LoadNfcTag(std::span<const u8> data) {
if (device_state != NFP::DeviceState::SearchingForTag) {
LOG_ERROR(Service_NFC, "Game is not looking for nfc tag, current state {}", device_state);
return false;
}
if (data.size() != sizeof(NFP::EncryptedNTAG215File)) {
LOG_ERROR(Service_NFC, "Not an amiibo, size={}", data.size());
return false;
}
memcpy(&encrypted_tag_data, data.data(), sizeof(NFP::EncryptedNTAG215File));
device_state = NFP::DeviceState::TagFound;
deactivate_event->GetReadableEvent().Clear();
activate_event->Signal();
return true;
}
void NfcDevice::CloseNfcTag() {
LOG_INFO(Service_NFC, "Remove nfc tag");
device_state = NFP::DeviceState::TagRemoved;
encrypted_tag_data = {};
activate_event->GetReadableEvent().Clear();
deactivate_event->Signal();
}
Kernel::KReadableEvent& NfcDevice::GetActivateEvent() const {
return activate_event->GetReadableEvent();
}
Kernel::KReadableEvent& NfcDevice::GetDeactivateEvent() const {
return deactivate_event->GetReadableEvent();
}
void NfcDevice::Initialize() {
device_state =
npad_device->HasNfc() ? NFP::DeviceState::Initialized : NFP::DeviceState::Unavailable;
encrypted_tag_data = {};
}
void NfcDevice::Finalize() {
if (device_state == NFP::DeviceState::SearchingForTag ||
device_state == NFP::DeviceState::TagRemoved) {
StopDetection();
}
device_state = NFP::DeviceState::Unavailable;
}
Result NfcDevice::StartDetection(s32 protocol_) {
if (device_state != NFP::DeviceState::Initialized &&
device_state != NFP::DeviceState::TagRemoved) {
LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
return WrongDeviceState;
}
if (!npad_device->SetPollingMode(Common::Input::PollingMode::NFC)) {
LOG_ERROR(Service_NFC, "Nfc not supported");
return NfcDisabled;
}
device_state = NFP::DeviceState::SearchingForTag;
protocol = protocol_;
return ResultSuccess;
}
Result NfcDevice::StopDetection() {
npad_device->SetPollingMode(Common::Input::PollingMode::Active);
if (device_state == NFP::DeviceState::Initialized) {
return ResultSuccess;
}
if (device_state == NFP::DeviceState::TagFound ||
device_state == NFP::DeviceState::TagMounted) {
CloseNfcTag();
return ResultSuccess;
}
if (device_state == NFP::DeviceState::SearchingForTag ||
device_state == NFP::DeviceState::TagRemoved) {
device_state = NFP::DeviceState::Initialized;
return ResultSuccess;
}
LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
return WrongDeviceState;
}
Result NfcDevice::GetTagInfo(NFP::TagInfo& tag_info) const {
if (device_state != NFP::DeviceState::TagFound &&
device_state != NFP::DeviceState::TagMounted) {
LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
if (device_state == NFP::DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
// Protocol and tag type may change here
tag_info = {
.uuid = encrypted_tag_data.uuid.uid,
.uuid_length = static_cast<u8>(encrypted_tag_data.uuid.uid.size()),
.protocol = NFP::TagProtocol::TypeA,
.tag_type = NFP::TagType::Type2,
};
return ResultSuccess;
}
u64 NfcDevice::GetHandle() const {
// Generate a handle based of the npad id
return static_cast<u64>(npad_id);
}
NFP::DeviceState NfcDevice::GetCurrentState() const {
return device_state;
}
Core::HID::NpadIdType NfcDevice::GetNpadId() const {
return npad_id;
}
} // namespace Service::NFC
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