4 files changed, 65 insertions, 0 deletions

diff --git a/src/input_common/CMakeLists.txt b/src/input_common/CMakeLists.txt
index 09361e37e..c84685214 100644
--- a/src/input_common/CMakeLists.txt
+++ b/src/input_common/CMakeLists.txt
@@ -7,6 +7,8 @@ add_library(input_common STATIC
     main.h
     motion_emu.cpp
     motion_emu.h
+    motion_from_button.cpp
+    motion_from_button.h
     motion_input.cpp
     motion_input.h
     settings.cpp
diff --git a/src/input_common/main.cpp b/src/input_common/main.cpp
index 8da829132..3d97d95f7 100644
--- a/src/input_common/main.cpp
+++ b/src/input_common/main.cpp
@@ -11,6 +11,7 @@
 #include "input_common/keyboard.h"
 #include "input_common/main.h"
 #include "input_common/motion_emu.h"
+#include "input_common/motion_from_button.h"
 #include "input_common/touch_from_button.h"
 #include "input_common/udp/client.h"
 #include "input_common/udp/udp.h"
@@ -32,6 +33,8 @@ struct InputSubsystem::Impl {
         Input::RegisterFactory<Input::ButtonDevice>("keyboard", keyboard);
         Input::RegisterFactory<Input::AnalogDevice>("analog_from_button",
                                                     std::make_shared<AnalogFromButton>());
+        Input::RegisterFactory<Input::MotionDevice>("keyboard",
+                                                    std::make_shared<MotionFromButton>());
         motion_emu = std::make_shared<MotionEmu>();
         Input::RegisterFactory<Input::MotionDevice>("motion_emu", motion_emu);
         Input::RegisterFactory<Input::TouchDevice>("touch_from_button",
@@ -50,6 +53,7 @@ struct InputSubsystem::Impl {
 
     void Shutdown() {
         Input::UnregisterFactory<Input::ButtonDevice>("keyboard");
+        Input::UnregisterFactory<Input::MotionDevice>("keyboard");
         keyboard.reset();
         Input::UnregisterFactory<Input::AnalogDevice>("analog_from_button");
         Input::UnregisterFactory<Input::MotionDevice>("motion_emu");
diff --git a/src/input_common/motion_from_button.cpp b/src/input_common/motion_from_button.cpp
new file mode 100644
index 000000000..9d459f963
--- /dev/null
+++ b/src/input_common/motion_from_button.cpp
@@ -0,0 +1,34 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "input_common/motion_from_button.h"
+#include "input_common/motion_input.h"
+
+namespace InputCommon {
+
+class MotionKey final : public Input::MotionDevice {
+public:
+    using Button = std::unique_ptr<Input::ButtonDevice>;
+
+    MotionKey(Button key_) : key(std::move(key_)) {}
+
+    Input::MotionStatus GetStatus() const override {
+
+        if (key->GetStatus()) {
+            return motion.GetRandomMotion(2, 6);
+        }
+        return motion.GetRandomMotion(0, 0);
+    }
+
+private:
+    Button key;
+    InputCommon::MotionInput motion{0.0f, 0.0f, 0.0f};
+};
+
+std::unique_ptr<Input::MotionDevice> MotionFromButton::Create(const Common::ParamPackage& params) {
+    auto key = Input::CreateDevice<Input::ButtonDevice>(params.Serialize());
+    return std::make_unique<MotionKey>(std::move(key));
+}
+
+} // namespace InputCommon
diff --git a/src/input_common/motion_from_button.h b/src/input_common/motion_from_button.h
new file mode 100644
index 000000000..a959046fb
--- /dev/null
+++ b/src/input_common/motion_from_button.h
@@ -0,0 +1,25 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/frontend/input.h"
+
+namespace InputCommon {
+
+/**
+ * An motion device factory that takes a keyboard button and uses it as a random
+ * motion device.
+ */
+class MotionFromButton final : public Input::Factory<Input::MotionDevice> {
+public:
+    /**
+     * Creates an motion device from button devices
+     * @param params contains parameters for creating the device:
+     *     - "key": a serialized ParamPackage for creating a button device
+     */
+    std::unique_ptr<Input::MotionDevice> Create(const Common::ParamPackage& params) override;
+};
+
+} // namespace InputCommon