Preliminary update to the GameCube to GBA link cable emulation. Fixes Zelda Wind Waker's Tingle Tuner connection, Pac-Man Vs, Final Fantasy: Crystal Chronicles multiplayer, and most other Gamecube to GBA link cable games.

* Added a second socket at port 49420 (0xc10c) which sends clock information
* Handled disconnections from the GBA and GC
* Made the transfers asynchronous
* Blocks the socket before the connection times out

Requires Dolphin 4.0-5899 or later.

git-svn-id: https://svn.code.sf.net/p/vbam/code/trunk@1235 a31d4220-a93d-0410-bf67-fe4944624d44

src/gba/GBA.cpp

@@ -3016,10 +3016,11 @@ void CPUUpdateRegister(u32 address, u16 value)
 	  break;
   case COMM_JOY_TRANS_H:
 	  UPDATE_REG(COMM_JOY_TRANS_H, value);
+	  UPDATE_REG(COMM_JOYSTAT, READ16LE(&ioMem[COMM_JOYSTAT]) | JOYSTAT_SEND);
 	  break;
 
   case COMM_JOYSTAT:
-	  UPDATE_REG(COMM_JOYSTAT, (READ16LE(&ioMem[COMM_JOYSTAT]) & 0xf) | (value & 0xf0));
+	  UPDATE_REG(COMM_JOYSTAT, (READ16LE(&ioMem[COMM_JOYSTAT]) & 0x0a) | (value & ~0x0a));
 	  break;
 #endif
 
@@ -3590,8 +3591,8 @@ void CPULoop(int ticks)
 
 #ifndef NO_LINK
   // shuffle2: what's the purpose?
-  if(gba_link_enabled)
+  //if(gba_link_enabled)
-    cpuNextEvent = 1;
+    //cpuNextEvent = 1;
 #endif
 
   cpuBreakLoop = false;
@@ -4040,12 +4041,12 @@ void CPULoop(int ticks)
 
       ticks -= clockTicks;
 
-	  if (gba_joybus_enabled)
-		  JoyBusUpdate(clockTicks);
-
 #ifndef NO_LINK
 	  if (gba_link_enabled)
 		  LinkUpdate(clockTicks);
+		  
+  	  if (gba_joybus_enabled)
+		  JoyBusUpdate(clockTicks);
 #endif
 
       cpuNextEvent = CPUUpdateTicks();
@@ -4063,7 +4064,7 @@ void CPULoop(int ticks)
 
 #ifndef NO_LINK
 	  // shuffle2: what's the purpose?
-	  if(gba_link_enabled)
+	  if(gba_link_enabled || gba_joybus_active)
   	       cpuNextEvent = 1;
 #endif
 

src/gba/GBALink.cpp

@@ -30,6 +30,7 @@ const char *MakeInstanceFilename(const char *Input)
 
 // Joybus
 bool gba_joybus_enabled = false;
+bool gba_joybus_active = false;
 
 // If disabled, gba core won't call any (non-joybus) link functions
 bool gba_link_enabled = false;
@@ -388,30 +389,84 @@ void JoyBusShutdown()
 	dol = NULL;
 }
 
+const u64 TICKS_PER_FRAME = 16777216 / 60;
+const u64 TICKS_PER_SECOND = 16777216;
+const u64 BITS_PER_SECOND = 115200;
+const u64 BYTES_PER_SECOND = BITS_PER_SECOND / 8;
+
+static u32 lastjoybusupdate = 0;
+static u32 nextjoybusupdate = 0;
+static u32 lastcommand = 0;
+static bool booted = false;
+
 void JoyBusUpdate(int ticks)
 {
-	linktime += ticks;
+	lastjoybusupdate += ticks;
-	static int lastjoybusupdate = 0;
+	lastcommand += ticks;
 
-	// Kinda ugly hack to update joybus stuff intermittently
+	bool joybus_activated = ((READ16LE(&ioMem[COMM_RCNT])) >> 14) == 3;
-	if (linktime > lastjoybusupdate + 0x3000)
+	gba_joybus_active = dol && gba_joybus_enabled && joybus_activated;
+
+	if ((lastjoybusupdate > nextjoybusupdate))
 	{
-		lastjoybusupdate = linktime;
+		if (!joybus_activated)
+		{
+			if (dol && booted)
+			{
+				JoyBusShutdown();
+			}
 
-		char data[5] = {0x10, 0, 0, 0, 0}; // init with invalid cmd
+			lastjoybusupdate = 0;
-		std::vector<char> resp;
+			nextjoybusupdate = 0;
+			lastcommand = 0;
+			return;
+		}
 
 		if (!dol)
+		{
+			booted = false;
 			JoyBusConnect();
+		}
+
+		dol->ReceiveClock(false);
+
+		if (dol->IsDisconnected())
+		{
+			JoyBusShutdown();
+			nextjoybusupdate = TICKS_PER_SECOND * 2; // try to connect after 2 seconds
+			lastjoybusupdate = 0;
+			lastcommand = 0;
+			return;
+		}
+
+		dol->ClockSync(lastjoybusupdate);
+
+		char data[5] = { 0x10, 0, 0, 0, 0 }; // init with invalid cmd
+		std::vector<char> resp;
+		u8 cmd = 0x10;
+
+		if (lastcommand > (TICKS_PER_FRAME * 4))
+		{
+			cmd = dol->ReceiveCmd(data, true);
+		}
+		else
+		{
+			cmd = dol->ReceiveCmd(data, false);
+		}
 
-		u8 cmd = dol->ReceiveCmd(data);
 		switch (cmd) {
 		case JOY_CMD_RESET:
 			UPDATE_REG(COMM_JOYCNT, READ16LE(&ioMem[COMM_JOYCNT]) | JOYCNT_RESET);
+			resp.push_back(0x00); // GBA device ID
+			resp.push_back(0x04);
+			nextjoybusupdate = TICKS_PER_SECOND / BYTES_PER_SECOND;
+			break;
 
 		case JOY_CMD_STATUS:
 			resp.push_back(0x00); // GBA device ID
 			resp.push_back(0x04);
+
+			nextjoybusupdate = TICKS_PER_SECOND / BYTES_PER_SECOND;
 			break;
 
 		case JOY_CMD_READ:
@@ -419,8 +474,10 @@ void JoyBusUpdate(int ticks)
 			resp.push_back((u8)(READ16LE(&ioMem[COMM_JOY_TRANS_L]) >> 8));
 			resp.push_back((u8)(READ16LE(&ioMem[COMM_JOY_TRANS_H]) & 0xff));
 			resp.push_back((u8)(READ16LE(&ioMem[COMM_JOY_TRANS_H]) >> 8));
-			UPDATE_REG(COMM_JOYSTAT, READ16LE(&ioMem[COMM_JOYSTAT]) & ~JOYSTAT_SEND);
+
 			UPDATE_REG(COMM_JOYCNT, READ16LE(&ioMem[COMM_JOYCNT]) | JOYCNT_SEND_COMPLETE);
+			nextjoybusupdate = TICKS_PER_SECOND / BYTES_PER_SECOND;
+			booted = true;
 			break;
 
 		case JOY_CMD_WRITE:
@@ -428,22 +485,35 @@ void JoyBusUpdate(int ticks)
 			UPDATE_REG(COMM_JOY_RECV_H, (u16)((u16)data[4] << 8) | (u8)data[3]);
 			UPDATE_REG(COMM_JOYSTAT, READ16LE(&ioMem[COMM_JOYSTAT]) | JOYSTAT_RECV);
 			UPDATE_REG(COMM_JOYCNT, READ16LE(&ioMem[COMM_JOYCNT]) | JOYCNT_RECV_COMPLETE);
+			nextjoybusupdate = TICKS_PER_SECOND / BYTES_PER_SECOND;
+			booted = true;
 			break;
 
 		default:
+			nextjoybusupdate = TICKS_PER_SECOND / 40000;
+			lastjoybusupdate = 0;
 			return; // ignore
 		}
 
+		lastjoybusupdate = 0;
 		resp.push_back((u8)READ16LE(&ioMem[COMM_JOYSTAT]));
+
+		if (cmd == JOY_CMD_READ)
+		{
+			UPDATE_REG(COMM_JOYSTAT, READ16LE(&ioMem[COMM_JOYSTAT]) & ~JOYSTAT_SEND);
+		}
+
 		dol->Send(resp);
 
 		// Generate SIO interrupt if we can
-		if ( ((cmd == JOY_CMD_RESET) || (cmd == JOY_CMD_READ) || (cmd == JOY_CMD_WRITE))
+		if (((cmd == JOY_CMD_RESET) || (cmd == JOY_CMD_READ) || (cmd == JOY_CMD_WRITE))
 			&& (READ16LE(&ioMem[COMM_JOYCNT]) & JOYCNT_INT_ENABLE) )
 		{
 			IF |= 0x80;
 			UPDATE_REG(0x202, IF);
 		}
+
+		lastcommand = 0;
 	}
 }
 
@@ -451,6 +521,9 @@ static void ReInitLink();
 
 void LinkUpdate(int ticks)
 {
+	if (((READ16LE(&ioMem[COMM_RCNT])) >> 14) == 3)
+		return;
+
 	// this actually gets called every single instruction, so keep default
 	// path as short as possible
 

src/gba/GBALink.h

@@ -145,6 +145,7 @@ typedef struct {
 } LANLINKDATA;
 
 extern bool gba_joybus_enabled;
+extern bool gba_joybus_active;
 extern bool gba_link_enabled;
 
 extern sf::IPAddress joybusHostAddr;

src/gba/GBASockClient.cpp

@@ -12,14 +12,23 @@ GBASockClient::GBASockClient(sf::IPAddress _server_addr)
 		server_addr = _server_addr;
 
 	client.Connect(0xd6ba, server_addr);
-	//client.SetBlocking(false);
+	client.SetBlocking(false);
+
+	clock_client.Connect(0xc10c, server_addr);
+	clock_client.SetBlocking(false);
+
+	clock_sync = 0;
+	is_disconnected = false;
 }
 
 GBASockClient::~GBASockClient()
 {
 	client.Close();
+	clock_client.Close();
 }
 
+u32 clock_sync_ticks = 0;
+
 void GBASockClient::Send(std::vector<char> data)
 {
 	char* plain_data = new char[data.size()];
@@ -31,12 +40,60 @@ void GBASockClient::Send(std::vector<char> data)
 }
 
 // Returns cmd for convenience
-char GBASockClient::ReceiveCmd(char* data_in)
+char GBASockClient::ReceiveCmd(char* data_in, bool block)
 {
-	std::size_t num_received;
+	if (IsDisconnected())
-	client.Receive(data_in, 5, num_received);
+		return data_in[0];
+
+	std::size_t num_received = 0;
+	if (block || clock_sync == 0)
+	{
+		sf::SelectorTCP Selector;
+		Selector.Add(client);
+		Selector.Wait(6);
+	}
+	if (client.Receive(data_in, 5, num_received) == sf::Socket::Disconnected)
+		Disconnect();
 
 	return data_in[0];
 }
 
+void GBASockClient::ReceiveClock(bool block)
+{
+	if (IsDisconnected())
+		return;
+
+	char sync_ticks[4] = { 0, 0, 0, 0 };
+	std::size_t num_received = 0;
+	if (clock_client.Receive(sync_ticks, 4, num_received) == sf::Socket::Disconnected)
+		Disconnect();
+
+	if (num_received == 4)
+	{
+		clock_sync_ticks = 0;
+		for (int i = 0; i < 4; i++)
+			clock_sync_ticks |= (u8)(sync_ticks[i]) << ((3 - i) * 8);
+		clock_sync += clock_sync_ticks;
+	}
+}
+
+void GBASockClient::ClockSync(u32 ticks)
+{
+	if (clock_sync > (s32)ticks)
+		clock_sync -= (s32)ticks;
+	else
+		clock_sync = 0;
+}
+
+void GBASockClient::Disconnect()
+{
+	is_disconnected = true;
+	client.Close();
+	clock_client.Close();
+}
+
+bool GBASockClient::IsDisconnected()
+{
+	return !client.IsValid() || !clock_client.IsValid() || is_disconnected;
+}
 #endif // NO_LINK

src/gba/GBASockClient.h

@@ -10,9 +10,18 @@ public:
 	~GBASockClient();
 
 	void Send(std::vector<char> data);
-	char ReceiveCmd(char* data_in);
+	char ReceiveCmd(char* data_in, bool block);
+	void ReceiveClock(bool block);
+
+	void ClockSync(u32 ticks);
+	void Disconnect();
+	bool IsDisconnected();
 
 private:
 	sf::IPAddress server_addr;
 	sf::SocketTCP client;
+	sf::SocketTCP clock_client;
+
+	s32 clock_sync;
+	bool is_disconnected;
 };

src/gba/Globals.h

@@ -33,6 +33,8 @@ extern bool skipBios;
 extern int frameSkip;
 extern bool speedup;
 extern bool synchronize;
+extern bool gba_joybus_enabled;
+extern bool gba_joybus_active;
 extern bool cpuDisableSfx;
 extern bool cpuIsMultiBoot;
 extern bool parseDebug;

src/win32/Direct3D.cpp

@@ -180,7 +180,7 @@ void Direct3DDisplay::prepareDisplayMode()
 	dpp.hDeviceWindow = theApp.m_pMainWnd->GetSafeHwnd();
 	dpp.FullScreen_RefreshRateInHz = ( dpp.Windowed == TRUE ) ? 0 : theApp.fsFrequency;
 	dpp.Flags = 0;
-	dpp.PresentationInterval = theApp.vsync ? D3DPRESENT_INTERVAL_ONE : D3DPRESENT_INTERVAL_IMMEDIATE;
+	dpp.PresentationInterval = (theApp.vsync && !gba_joybus_active) ? D3DPRESENT_INTERVAL_ONE : D3DPRESENT_INTERVAL_IMMEDIATE;
 	// D3DPRESENT_INTERVAL_ONE means VSync ON
 
 

src/win32/DirectSound.cpp

@@ -240,7 +240,7 @@ void DirectSound::write(u16 * finalWave, int length)
 	LPVOID       lpvPtr2;
 	DWORD        dwBytes2 = 0;
 
-	if( !speedup && synchronize && !theApp.throttle ) {
+	if( !speedup && synchronize && !theApp.throttle && !gba_joybus_active) {
 		hr = dsbSecondary->GetStatus(&status);
 		if( status & DSBSTATUS_PLAYING ) {
 			if( !soundPaused ) {

src/win32/MainWnd.cpp

@@ -1218,7 +1218,7 @@ void MainWnd::OnActivate(UINT nState, CWnd* pWndOther, BOOL bMinimized)
     }
   } else {
     theApp.wasPaused = true;
-    if(theApp.pauseWhenInactive) {
+    if(theApp.pauseWhenInactive && !gba_joybus_active) {
       if(emulating) {
         soundPause();
       }

src/win32/OpenAL.cpp

@@ -281,7 +281,7 @@ void OpenAL::write(u16 * finalWave, int length)
 			}
 		}
 
-		if( !speedup && synchronize && !theApp.throttle ) {
+		if( !speedup && synchronize && !theApp.throttle  && !gba_joybus_active) {
 			// wait until at least one buffer has finished
 			while( nBuffersProcessed == 0 ) {
 				winlog( " waiting...\n" );

src/win32/OpenGL.cpp

@@ -336,7 +336,7 @@ bool OpenGLDisplay::initialize()
 
 	initializeMatrices( theApp.surfaceSizeX, theApp.surfaceSizeY );
 
-	setVSync( theApp.vsync );
+	setVSync( theApp.vsync && !gba_joybus_active );
 
 #ifdef MMX
 	if(!theApp.disableMMX)

src/win32/VBA.cpp

@@ -2706,7 +2706,7 @@ void Sm60FPS_Sleep()
 	if( theApp.autoFrameSkip ) {
 		u32 dwTimePass = Sm60FPS::dwTimeElapse + (GetTickCount() - Sm60FPS::dwTime0);
 		u32 dwTimeShould = (u32)(Sm60FPS::nFrameCnt * Sm60FPS::K_fDT);
-		if( dwTimeShould > dwTimePass ) {
+		if (dwTimeShould > dwTimePass && !gba_joybus_active) {
 			Sleep(dwTimeShould - dwTimePass);
 		}
 	}

src/win32/XAudio2.cpp

@@ -451,7 +451,7 @@ void XAudio2_Output::write(u16 * finalWave, int length)
 			break;
 		} else {
 			// the maximum number of buffers is currently queued
-			if( synchronize && !speedup && !theApp.throttle ) {
+			if( synchronize && !speedup && !theApp.throttle && !gba_joybus_active ) {
 				// wait for one buffer to finish playing
 				if (WaitForSingleObject( notify.hBufferEndEvent, 10000 ) == WAIT_TIMEOUT) {
 					device_changed = true;