1 files changed, 111 insertions, 0 deletions
diff --git a/src/core/hle/service/hid/hid.h b/src/core/hle/service/hid/hid.h
new file mode 100644
index 000000000..73cdaa527
--- /dev/null
+++ b/src/core/hle/service/hid/hid.h
@@ -0,0 +1,111 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+
+#include "core/hle/kernel/kernel.h"
+#include "common/bit_field.h"
+
+namespace Service {
+namespace HID {
+
+// Handle to shared memory region designated to HID_User service
+extern Handle g_shared_mem;
+
+// Event handles
+extern Handle g_event_pad_or_touch_1;
+extern Handle g_event_pad_or_touch_2;
+extern Handle g_event_accelerometer;
+extern Handle g_event_gyroscope;
+extern Handle g_event_debug_pad;
+
+/**
+ * Structure of a Pad controller state.
+ */
+struct PadState {
+    union {
+        u32 hex;
+
+        BitField<0, 1, u32> a;
+        BitField<1, 1, u32> b;
+        BitField<2, 1, u32> select;
+        BitField<3, 1, u32> start;
+        BitField<4, 1, u32> right;
+        BitField<5, 1, u32> left;
+        BitField<6, 1, u32> up;
+        BitField<7, 1, u32> down;
+        BitField<8, 1, u32> r;
+        BitField<9, 1, u32> l;
+        BitField<10, 1, u32> x;
+        BitField<11, 1, u32> y;
+
+        BitField<28, 1, u32> circle_right;
+        BitField<29, 1, u32> circle_left;
+        BitField<30, 1, u32> circle_up;
+        BitField<31, 1, u32> circle_down;
+    };
+};
+
+/**
+ * Structure of a single entry in the PadData's Pad state history array.
+ */
+struct PadDataEntry {
+    PadState current_state;
+    PadState delta_additions;
+    PadState delta_removals;
+
+    s16 circle_pad_x;
+    s16 circle_pad_y;
+};
+
+/**
+ * Structure of all data related to the 3DS Pad.
+ */
+struct PadData {
+    s64 index_reset_ticks;
+    s64 index_reset_ticks_previous;
+    u32 index; // the index of the last updated Pad state history element
+
+    u32 pad1;
+    u32 pad2;
+
+    PadState current_state; // same as entries[index].current_state
+    u32 raw_circle_pad_data;
+
+    u32 pad3;
+
+    std::array<PadDataEntry, 8> entries; // Pad state history
+};
+
+// Pre-defined PadStates for single button presses
+const PadState PAD_NONE         = {{0}};
+const PadState PAD_A            = {{1u << 0}};
+const PadState PAD_B            = {{1u << 1}};
+const PadState PAD_SELECT       = {{1u << 2}};
+const PadState PAD_START        = {{1u << 3}};
+const PadState PAD_RIGHT        = {{1u << 4}};
+const PadState PAD_LEFT         = {{1u << 5}};
+const PadState PAD_UP           = {{1u << 6}};
+const PadState PAD_DOWN         = {{1u << 7}};
+const PadState PAD_R            = {{1u << 8}};
+const PadState PAD_L            = {{1u << 9}};
+const PadState PAD_X            = {{1u << 10}};
+const PadState PAD_Y            = {{1u << 11}};
+const PadState PAD_CIRCLE_RIGHT = {{1u << 28}};
+const PadState PAD_CIRCLE_LEFT  = {{1u << 29}};
+const PadState PAD_CIRCLE_UP    = {{1u << 30}};
+const PadState PAD_CIRCLE_DOWN  = {{1u << 31}};
+
+// Methods for updating the HID module's state
+void PadButtonPress(const PadState& pad_state);
+void PadButtonRelease(const PadState& pad_state);
+void PadUpdateComplete();
+
+void HIDInit();
+void HIDShutdown();
+
+}
+}