From de993dcfbdcda1632752004d2840107c7ff5b45d Mon Sep 17 00:00:00 2001
From: GPUCode <47210458+GPUCode@users.noreply.github.com>
Date: Sat, 10 Feb 2024 00:09:05 +0200
Subject: [PATCH] service: Stub mcu::HWC (#7428)

---
 src/core/CMakeLists.txt              |  4 ++++
 src/core/hle/service/mcu/mcu.cpp     | 16 +++++++++++++
 src/core/hle/service/mcu/mcu.h       | 15 ++++++++++++
 src/core/hle/service/mcu/mcu_hwc.cpp | 36 ++++++++++++++++++++++++++++
 src/core/hle/service/mcu/mcu_hwc.h   | 21 ++++++++++++++++
 src/core/hle/service/service.cpp     |  3 ++-
 6 files changed, 94 insertions(+), 1 deletion(-)
 create mode 100644 src/core/hle/service/mcu/mcu.cpp
 create mode 100644 src/core/hle/service/mcu/mcu.h
 create mode 100644 src/core/hle/service/mcu/mcu_hwc.cpp
 create mode 100644 src/core/hle/service/mcu/mcu_hwc.h

diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index dc45e1eb8..cf29c05a8 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -327,6 +327,10 @@ add_library(citra_core STATIC
     hle/service/ldr_ro/cro_helper.h
     hle/service/ldr_ro/ldr_ro.cpp
     hle/service/ldr_ro/ldr_ro.h
+    hle/service/mcu/mcu_hwc.cpp
+    hle/service/mcu/mcu_hwc.h
+    hle/service/mcu/mcu.cpp
+    hle/service/mcu/mcu.h
     hle/service/mic/mic_u.cpp
     hle/service/mic/mic_u.h
     hle/service/mvd/mvd.cpp
diff --git a/src/core/hle/service/mcu/mcu.cpp b/src/core/hle/service/mcu/mcu.cpp
new file mode 100644
index 000000000..dff4ee3e9
--- /dev/null
+++ b/src/core/hle/service/mcu/mcu.cpp
@@ -0,0 +1,16 @@
+// Copyright 2024 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/core.h"
+#include "core/hle/service/mcu/mcu.h"
+#include "core/hle/service/mcu/mcu_hwc.h"
+
+namespace Service::MCU {
+
+void InstallInterfaces(Core::System& system) {
+    auto& service_manager = system.ServiceManager();
+    std::make_shared<HWC>()->InstallAsService(service_manager);
+}
+
+} // namespace Service::MCU
diff --git a/src/core/hle/service/mcu/mcu.h b/src/core/hle/service/mcu/mcu.h
new file mode 100644
index 000000000..95431243f
--- /dev/null
+++ b/src/core/hle/service/mcu/mcu.h
@@ -0,0 +1,15 @@
+// Copyright 2024 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+namespace Core {
+class System;
+}
+
+namespace Service::MCU {
+
+void InstallInterfaces(Core::System& system);
+
+} // namespace Service::MCU
diff --git a/src/core/hle/service/mcu/mcu_hwc.cpp b/src/core/hle/service/mcu/mcu_hwc.cpp
new file mode 100644
index 000000000..c2a5d7514
--- /dev/null
+++ b/src/core/hle/service/mcu/mcu_hwc.cpp
@@ -0,0 +1,36 @@
+// Copyright 2024 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/archives.h"
+#include "core/hle/service/mcu/mcu_hwc.h"
+
+SERIALIZE_EXPORT_IMPL(Service::MCU::HWC)
+
+namespace Service::MCU {
+
+HWC::HWC() : ServiceFramework("mcu::HWC", 1) {
+    static const FunctionInfo functions[] = {
+        // clang-format off
+        {0x0001, nullptr, "ReadRegister"},
+        {0x0002, nullptr, "WriteRegister"},
+        {0x0003, nullptr, "GetInfoRegisters"},
+        {0x0004, nullptr, "GetBatteryVoltage"},
+        {0x0005, nullptr, "GetBatteryLevel"},
+        {0x0006, nullptr, "SetPowerLEDPattern"},
+        {0x0007, nullptr, "SetWifiLEDState"},
+        {0x0008, nullptr, "SetCameraLEDPattern"},
+        {0x0009, nullptr, "Set3DLEDState"},
+        {0x000A, nullptr, "SetInfoLEDPattern"},
+        {0x000B, nullptr, "GetSoundVolume"},
+        {0x000C, nullptr, "SetTopScreenFlicker"},
+        {0x000D, nullptr, "SetBottomScreenFlicker"},
+        {0x000F, nullptr, "GetRtcTime"},
+        {0x0010, nullptr, "GetMcuFwVerHigh"},
+        {0x0011, nullptr, "GetMcuFwVerLow"},
+        // clang-format on
+    };
+    RegisterHandlers(functions);
+}
+
+} // namespace Service::MCU
diff --git a/src/core/hle/service/mcu/mcu_hwc.h b/src/core/hle/service/mcu/mcu_hwc.h
new file mode 100644
index 000000000..fdcd7bf2f
--- /dev/null
+++ b/src/core/hle/service/mcu/mcu_hwc.h
@@ -0,0 +1,21 @@
+// Copyright 2024 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Service::MCU {
+
+class HWC final : public ServiceFramework<HWC> {
+public:
+    explicit HWC();
+
+private:
+    SERVICE_SERIALIZATION_SIMPLE
+};
+
+} // namespace Service::MCU
+
+BOOST_CLASS_EXPORT_KEY(Service::MCU::HWC)
diff --git a/src/core/hle/service/service.cpp b/src/core/hle/service/service.cpp
index 133bfce20..49b394bcd 100644
--- a/src/core/hle/service/service.cpp
+++ b/src/core/hle/service/service.cpp
@@ -35,6 +35,7 @@
 #include "core/hle/service/http/http_c.h"
 #include "core/hle/service/ir/ir.h"
 #include "core/hle/service/ldr_ro/ldr_ro.h"
+#include "core/hle/service/mcu/mcu.h"
 #include "core/hle/service/mic/mic_u.h"
 #include "core/hle/service/mvd/mvd.h"
 #include "core/hle/service/ndm/ndm_u.h"
@@ -101,7 +102,7 @@ const std::array<ServiceModuleInfo, 41> service_module_map{
      {"CDC", 0x00040130'00001802, nullptr},
      {"GPIO", 0x00040130'00001B02, nullptr},
      {"I2C", 0x00040130'00001E02, nullptr},
-     {"MCU", 0x00040130'00001F02, nullptr},
+     {"MCU", 0x00040130'00001F02, MCU::InstallInterfaces},
      {"MP", 0x00040130'00002A02, nullptr},
      {"PDN", 0x00040130'00002102, nullptr},
      {"SPI", 0x00040130'00002302, nullptr}}};