From 9c2355ba4f37585cd0054b3f05251a814ccbc0eb Mon Sep 17 00:00:00 2001
From: bunnei <ericbunnie@gmail.com>
Date: Sat, 5 Apr 2014 01:23:51 -0400
Subject: [PATCH] added a module for interfacing to hardware LCD

---
 src/core/src/hw/hw_lcd.cpp | 65 ++++++++++++++++++++++++++++++++++++++
 src/core/src/hw/hw_lcd.h   | 64 +++++++++++++++++++++++++++++++++++++
 2 files changed, 129 insertions(+)
 create mode 100644 src/core/src/hw/hw_lcd.cpp
 create mode 100644 src/core/src/hw/hw_lcd.h

diff --git a/src/core/src/hw/hw_lcd.cpp b/src/core/src/hw/hw_lcd.cpp
new file mode 100644
index 000000000..19e3b4ab4
--- /dev/null
+++ b/src/core/src/hw/hw_lcd.cpp
@@ -0,0 +1,65 @@
+/**
+ * Copyright (C) 2013 Citrus Emulator
+ *
+ * @file    hw_lcd.cpp
+ * @author  bunnei
+ * @date    2014-04-05
+ * @brief   Hardware LCD interface
+ *
+ * @section LICENSE
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details at
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * Official project repository can be found at:
+ * http://code.google.com/p/gekko-gc-emu/
+ */
+
+#include "log.h"
+#include "core.h"
+#include "hw_lcd.h"
+
+namespace LCD {
+
+static const u32 kFrameTicks = 268123480 / 30; // 268MHz / 30 frames per second
+
+u64 g_last_ticks = 0; ///< Last CPU ticks
+
+template <typename T>
+inline void Read(T &var, const u32 addr) {
+}
+
+template <typename T>
+inline void Write(u32 addr, const T data) {
+}
+
+/// Update hardware
+void Update() {
+    u64 current_ticks = Core::g_app_core->ticks();
+
+    if ((current_ticks - g_last_ticks) >= kFrameTicks) {
+        g_last_ticks = current_ticks;
+        NOTICE_LOG(LCD, "Update frame");
+    }
+}
+
+/// Initialize hardware
+void Init() {
+    g_last_ticks = Core::g_app_core->ticks();
+
+    NOTICE_LOG(LCD, "LCD initialized OK");
+}
+
+/// Shutdown hardware
+void Shutdown() {
+    NOTICE_LOG(LCD, "LCD shutdown OK");
+}
+
+} // namespace
diff --git a/src/core/src/hw/hw_lcd.h b/src/core/src/hw/hw_lcd.h
new file mode 100644
index 000000000..fa19b1cd4
--- /dev/null
+++ b/src/core/src/hw/hw_lcd.h
@@ -0,0 +1,64 @@
+/**
+ * Copyright (C) 2013 Citrus Emulator
+ *
+ * @file    hw_lcd.h
+ * @author  bunnei
+ * @date    2014-04-05
+ * @brief   Hardware LCD interface
+ *
+ * @section LICENSE
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details at
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * Official project repository can be found at:
+ * http://code.google.com/p/gekko-gc-emu/
+ */
+
+#pragma once
+
+#include "common_types.h"
+
+namespace LCD {
+
+enum {
+    TOP_ASPECT_X        = 0x5,
+    TOP_ASPECT_Y        = 0x3,
+    
+    TOP_HEIGHT          = 240,
+    TOP_WIDTH           = 400,
+    BOTTOM_WIDTH        = 320,
+
+    FRAMEBUFFER_SEL     = 0x20184E59,
+    TOP_LEFT_FRAME1     = 0x20184E60,
+    TOP_LEFT_FRAME2     = 0x201CB370,
+    TOP_RIGHT_FRAME1    = 0x20282160,
+    TOP_RIGHT_FRAME2    = 0x202C8670,
+    SUB_FRAME1          = 0x202118E0,
+    SUB_FRAME2          = 0x20249CF0,
+};
+
+template <typename T>
+inline void Read(T &var, const u32 addr);
+
+template <typename T>
+inline void Write(u32 addr, const T data);
+
+/// Update hardware
+void Update();
+
+/// Initialize hardware
+void Init();
+
+/// Shutdown hardware
+void Shutdown();
+
+
+} // namespace