lay base for camera shito

src/DSi_Camera.cpp

@@ -0,0 +1,143 @@
+/*
+    Copyright 2016-2019 Arisotura
+
+    This file is part of melonDS.
+
+    melonDS 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 3 of the License, or (at your option)
+    any later version.
+
+    melonDS 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.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include "DSi_Camera.h"
+
+
+DSi_Camera* DSi_Camera0; // 78 / facing outside
+DSi_Camera* DSi_Camera1; // 7A / selfie cam
+
+
+bool DSi_Camera::Init()
+{
+    DSi_Camera0 = new DSi_Camera(0);
+    DSi_Camera1 = new DSi_Camera(1);
+
+    return true;
+}
+
+void DSi_Camera::DeInit()
+{
+    delete DSi_Camera0;
+    delete DSi_Camera1;
+}
+
+void DSi_Camera::Reset()
+{
+    DSi_Camera0->ResetCam();
+    DSi_Camera1->ResetCam();
+}
+
+
+DSi_Camera::DSi_Camera(u32 num)
+{
+    Num = num;
+}
+
+DSi_Camera::~DSi_Camera()
+{
+    //
+}
+
+void DSi_Camera::ResetCam()
+{
+    DataPos = 0;
+    RegAddr = 0;
+    RegData = 0;
+}
+
+
+void DSi_Camera::Start()
+{
+}
+
+u8 DSi_Camera::Read(bool last)
+{
+    u8 ret;
+
+    if (DataPos < 2)
+    {
+        printf("DSi_Camera: WHAT??\n");
+        ret = 0;
+    }
+    else
+    {
+        if (DataPos & 0x1)
+        {
+            ret = RegData & 0xFF;
+            RegAddr += 2; // checkme
+        }
+        else
+        {
+            RegData = ReadReg(RegAddr);
+            ret = RegData >> 8;
+        }
+    }
+
+    if (last) DataPos = 0;
+    else      DataPos++;
+
+    return ret;
+}
+
+void DSi_Camera::Write(u8 val, bool last)
+{
+    if (DataPos < 2)
+    {
+        if (DataPos == 0)
+            RegAddr = val << 8;
+        else
+            RegAddr |= val;
+
+        if (RegAddr & 0x1) printf("DSi_Camera: !! UNALIGNED REG ADDRESS %04X\n", RegAddr);
+    }
+    else
+    {
+        if (DataPos & 0x1)
+        {
+            RegData |= val;
+            WriteReg(RegAddr, RegData);
+            RegAddr += 2; // checkme
+        }
+        else
+        {
+            RegData = val << 8;
+        }
+    }
+
+    if (last) DataPos = 0;
+    else      DataPos++;
+}
+
+u16 DSi_Camera::ReadReg(u16 addr)
+{
+    switch (addr)
+    {
+    case 0x301A: return 0x0002; // HAX
+    }
+
+    printf("DSi_Camera%d: unknown read %04X\n", Num, addr);
+    return 0;
+}
+
+void DSi_Camera::WriteReg(u16 addr, u16 val)
+{
+    printf("DSi_Camera%d: unknown write %04X %04X\n", Num, addr, val);
+}