1 files changed, 52 insertions, 0 deletions

diff --git a/src/hid_core/resources/abstracted_pad/abstract_mcu_handler.h b/src/hid_core/resources/abstracted_pad/abstract_mcu_handler.h
new file mode 100644
index 000000000..9902dd03a
--- /dev/null
+++ b/src/hid_core/resources/abstracted_pad/abstract_mcu_handler.h
@@ -0,0 +1,52 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include "common/common_types.h"
+#include "core/hle/result.h"
+#include "hid_core/hid_types.h"
+
+namespace Service::HID {
+struct IAbstractedPad;
+class NpadAbstractedPadHolder;
+class NpadAbstractPropertiesHandler;
+
+enum class NpadMcuState : u32 {
+    None,
+    Available,
+    Active,
+};
+
+struct NpadMcuHolder {
+    NpadMcuState state;
+    INSERT_PADDING_BYTES(0x4);
+    IAbstractedPad* abstracted_pad;
+};
+static_assert(sizeof(NpadMcuHolder) == 0x10, "NpadMcuHolder is an invalid size");
+
+/// Handles Npad request from HID interfaces
+class NpadAbstractMcuHandler final {
+public:
+    explicit NpadAbstractMcuHandler();
+    ~NpadAbstractMcuHandler();
+
+    void SetAbstractPadHolder(NpadAbstractedPadHolder* holder);
+    void SetPropertiesHandler(NpadAbstractPropertiesHandler* handler);
+
+    Result IncrementRefCounter();
+    Result DecrementRefCounter();
+
+    void UpdateMcuState();
+    Result GetAbstractedPad(IAbstractedPad** data, u32 mcu_index);
+    NpadMcuState GetMcuState(u32 mcu_index);
+    Result SetMcuState(bool is_enabled, u32 mcu_index);
+
+private:
+    NpadAbstractedPadHolder* abstract_pad_holder{nullptr};
+    NpadAbstractPropertiesHandler* properties_handler{nullptr};
+
+    s32 ref_counter{};
+    std::array<NpadMcuHolder, 2> mcu_holder{};
+};
+} // namespace Service::HID