Implement partial EXI backup support

dolphin-emu · Feb 20, 2022 · 44bb7c5 · 44bb7c5
1 parent 0eaf6e8
commit 44bb7c5
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Showing 6 changed files with 45 additions and 1 deletion.
diff --git a/Source/Core/Common/CommonPaths.h b/Source/Core/Common/CommonPaths.h
@@ -34,6 +34,7 @@
 
 // Subdirs in the User dir returned by GetUserPath(D_USER_IDX)
 #define GC_USER_DIR "GC"
+#define TRI_USER_DIR "Triforce"
 #define GBA_USER_DIR "GBA"
 #define WII_USER_DIR "Wii"
 #define CONFIG_DIR "Config"

diff --git a/Source/Core/Common/FileUtil.cpp b/Source/Core/Common/FileUtil.cpp
@@ -932,6 +932,7 @@ static void RebuildUserDirectories(unsigned int dir_index)
   {
   case D_USER_IDX:
     s_user_paths[D_GCUSER_IDX] = s_user_paths[D_USER_IDX] + GC_USER_DIR DIR_SEP;
+    s_user_paths[D_TRIUSER_IDX] = s_user_paths[D_USER_IDX] + TRI_USER_DIR DIR_SEP;
     s_user_paths[D_WIIROOT_IDX] = s_user_paths[D_USER_IDX] + WII_USER_DIR DIR_SEP;
     s_user_paths[D_CONFIG_IDX] = s_user_paths[D_USER_IDX] + CONFIG_DIR DIR_SEP;
     s_user_paths[D_GAMESETTINGS_IDX] = s_user_paths[D_USER_IDX] + GAMESETTINGS_DIR DIR_SEP;

diff --git a/Source/Core/Common/FileUtil.h b/Source/Core/Common/FileUtil.h
@@ -27,6 +27,7 @@ enum
 {
   D_USER_IDX,
   D_GCUSER_IDX,
+  D_TRIUSER_IDX,
   D_WIIROOT_IDX,          // always points to User/Wii or global user-configured directory
   D_SESSION_WIIROOT_IDX,  // may point to minimal temporary directory for determinism
   D_CONFIG_IDX,           // global settings

diff --git a/Source/Core/Core/HW/EXI/EXI_DeviceBaseboard.cpp b/Source/Core/Core/HW/EXI/EXI_DeviceBaseboard.cpp
@@ -5,12 +5,34 @@
 
 #include "Common/Assert.h"
 #include "Common/ChunkFile.h"
+#include "Common/CommonPaths.h"
 #include "Common/CommonTypes.h"
+#include "Common/FileUtil.h"
+#include "Common/IOFile.h"
 #include "Common/Logging/Log.h"
 
 namespace ExpansionInterface
 {
-CEXIBaseboard::CEXIBaseboard() = default;
+CEXIBaseboard::CEXIBaseboard()
+{
+  m_position = 0;
+  m_have_irq = false;
+  EEPROM_filename = File::GetUserPath(D_TRIUSER_IDX) + "EEPROM.raw";
+  if (File::Exists(EEPROM_filename))
+  {
+    m_EEPROM = std::make_unique<File::IOFile>(EEPROM_filename, "rb+");
+  }
+  else
+  {
+    m_EEPROM = std::make_unique<File::IOFile>(EEPROM_filename, "wb+");
+  }
+}
+
+CEXIBaseboard::~CEXIBaseboard()
+{
+  m_EEPROM->Close();
+  File::Delete(EEPROM_filename);
+}
 
 void CEXIBaseboard::SetCS(int cs)
 {
@@ -37,12 +59,23 @@ void CEXIBaseboard::TransferByte(u8& byte)
     {
       static constexpr std::array<u8, 4> ID = {0x06, 0x04, 0x10, 0x00};
       byte = ID[(m_position - 2) & 3];
+      INFO_LOG_FMT(EXPANSIONINTERFACE, "EXI BASEBOARD: ID Check {:#x} {:#x})", m_command,
+                   m_position);
       break;
     }
     case 0x01:
+      m_offset = (m_subcommand[1] << 8 | (m_subcommand[2]));
+      m_EEPROM->Seek(m_offset, SEEK_SET);
       byte = 0x01;
+      WARN_LOG_FMT(EXPANSIONINTERFACE, "EXI BASEBOARD: Backup Offset {:#x} {:#x} (Offset: {:#x})",
+                   m_command, m_position, m_offset);
       break;
     case 0x02:
+      m_EEPROM->WriteBytes(&m_subcommand[1], 1);
+      m_EEPROM->Flush();
+      WARN_LOG_FMT(EXPANSIONINTERFACE,
+                   "EXI BASEBOARD: Backup Write {:#x} {:#x} (Target: {:#x}-{:#x})", m_command,
+                   m_position, m_offset, m_subcommand[1]);
       byte = 0x01;
       break;
     case 0x03:

diff --git a/Source/Core/Core/HW/EXI/EXI_DeviceBaseboard.h b/Source/Core/Core/HW/EXI/EXI_DeviceBaseboard.h
@@ -5,6 +5,8 @@
 
 #include "Core/HW/EXI/EXI_Device.h"
 
+#include "Common/IOFile.h"
+
 class PointerWrap;
 
 namespace ExpansionInterface
@@ -13,19 +15,24 @@ class CEXIBaseboard : public IEXIDevice
 {
 public:
   CEXIBaseboard();
+  ~CEXIBaseboard();
   void SetCS(int CS) override;
   bool IsPresent() const override;
   bool IsInterruptSet();
   void DoState(PointerWrap& p) override;
 
 private:
+  std::string EEPROM_filename;
+  std::unique_ptr<File::IOFile> m_EEPROM;
+
   // STATE_TO_SAVE
   bool m_have_irq;
   u32 m_position = 0;
   u32 m_command = 0;
   u8* m_subcommand = (u8*)&m_command;
   u32 m_irq_timer;
   u32 m_irq_status;
+  int m_offset;
 
   void TransferByte(u8& byte) override;
 };

diff --git a/Source/Core/UICommon/UICommon.cpp b/Source/Core/UICommon/UICommon.cpp
@@ -203,6 +203,7 @@ void CreateDirectories()
   File::CreateFullPath(File::GetUserPath(D_SHADERS_IDX));
   File::CreateFullPath(File::GetUserPath(D_SHADERS_IDX) + ANAGLYPH_DIR DIR_SEP);
   File::CreateFullPath(File::GetUserPath(D_STATESAVES_IDX));
+  File::CreateFullPath(File::GetUserPath(D_TRIUSER_IDX));
 #ifndef ANDROID
   File::CreateFullPath(File::GetUserPath(D_THEMES_IDX));
   File::CreateFullPath(File::GetUserPath(D_STYLES_IDX));