Pif.cpp

/*
 * Project 64 - A Nintendo 64 emulator.
 *
 * (c) Copyright 2001 zilmar (zilmar@emulation64.com) and 
 * Jabo (jabo@emulation64.com).
 *
 * pj64 homepage: www.pj64.net
 *
 * Permission to use, copy, modify and distribute Project64 in both binary and
 * source form, for non-commercial purposes, is hereby granted without fee,
 * providing that this license information and copyright notice appear with
 * all copies and any derived work.
 *
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event shall the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Project64 is freeware for PERSONAL USE only. Commercial users should
 * seek permission of the copyright holders first. Commercial use includes
 * charging money for Project64 or software derived from Project64.
 *
 * The copyright holders request that bug fixes and improvements to the code
 * should be forwarded to them so if they want them.
 *
 */
#include <windows.h>
#include <stdio.h>
#include "main.h"
#include "cpu.h"
#include "plugin.h"
#include "Debugger.h"


void ProcessControllerCommand ( int Control, BYTE * Command);
void ReadControllerCommand (int Control, BYTE * Command);

BYTE PifRom[0x7C0], *PIF_Ram;

int GetCicChipID (BYTE * RomData) {
	_int64 CRC = 0;
	int count;

	for (count = 0x40; count < 0x1000; count += 4) {
		CRC += *(DWORD *)(RomData+count);
	}
	switch (CRC) {
	case 0x000000D0027FDF31: return 1;
	case 0x000000CFFB631223: return 1;
	case 0x000000D057C85244: return 2;
	case 0x000000D6497E414B: return 3;
	case 0x0000011A49F60E96: return 5;
	case 0x000000D6D5BE5580: return 6;
	default:
		return -1;
	}
}

void LogControllerPakData (char * Description) {
#if (!defined(EXTERNAL_RELEASE))
	int count, count2;
	char HexData[100], AsciiData[100], Addon[20];
	LogMessage("\t%s:",Description);			
	LogMessage("\t------------------------------");
	for (count = 0; count < 16; count ++ ) {
		if ((count % 4) == 0) { 
			sprintf(HexData,"\0"); 
			sprintf(AsciiData,"\0"); 
		}
 		sprintf(Addon,"%02X %02X %02X %02X", 
			PIF_Ram[(count << 2) + 0], PIF_Ram[(count << 2) + 1], 
			PIF_Ram[(count << 2) + 2], PIF_Ram[(count << 2) + 3] );
		strcat(HexData,Addon);
		if (((count + 1) % 4) != 0) {
			sprintf(Addon,"-");
			strcat(HexData,Addon);
		} 
		
		Addon[0] = 0;
		for (count2 = 0; count2 < 4; count2++) {
			if (PIF_Ram[(count << 2) + count2] < 30) {
				strcat(Addon,".");
			} else {
				sprintf(Addon,"%s%c",Addon,PIF_Ram[(count << 2) + count2]);
			}
		}
		strcat(AsciiData,Addon);
		
		if (((count + 1) % 4) == 0) {
			LogMessage("\t%s %s",HexData, AsciiData);
		} 
	}
	LogMessage("");
#endif
}

#define IncreaseMaxPif2 300
int MaxPif2Cmds = 300;
unsigned __int64 * Pif2Reply[4];

char * GetPif2FileName(void) {
	char path_buffer[_MAX_PATH], drive[_MAX_DRIVE] ,dir[_MAX_DIR];
	char fname[_MAX_FNAME],ext[_MAX_EXT];
	static char IniFileName[_MAX_PATH];

	GetModuleFileName(NULL,path_buffer,sizeof(path_buffer));
	_splitpath( path_buffer, drive, dir, fname, ext );
	sprintf(IniFileName,"%s%s%s",drive,dir,"pif2.dat");
	return IniFileName;
}

BOOLEAN pif2valid = FALSE;

void LoadPIF2 () {
	FILE *pif2db = fopen (GetPif2FileName(), "rt");
//	unsigned __int64 p1, p2, r1, r2;
	char buff[255];
	int cnt = 0;
	
	Pif2Reply[0] = ( unsigned __int64 *)malloc((MaxPif2Cmds + 1) * sizeof(__int64));
	Pif2Reply[1] = ( unsigned __int64 *)malloc((MaxPif2Cmds + 1) * sizeof(__int64));
	Pif2Reply[2] = ( unsigned __int64 *)malloc((MaxPif2Cmds + 1) * sizeof(__int64));
	Pif2Reply[3] = ( unsigned __int64 *)malloc((MaxPif2Cmds + 1) * sizeof(__int64));

	if (Pif2Reply[0] == NULL || Pif2Reply[1] == NULL ||
		Pif2Reply[2] == NULL || Pif2Reply[3] == NULL) 
	{
		DisplayError(GS(MSG_MEM_ALLOC_ERROR));
		ExitThread(0);
	}
	if (pif2db == NULL) {
		Pif2Reply[0][0] = -1; Pif2Reply[1][0] = -1; 
		Pif2Reply[2][0] = -1; Pif2Reply[3][0] = -1;
		return;
	}
	
	while (feof (pif2db) == 0) {
		if (cnt == MaxPif2Cmds) {
			MaxPif2Cmds += IncreaseMaxPif2;
			Pif2Reply[0] = ( unsigned __int64 *)realloc(Pif2Reply[0],(MaxPif2Cmds + 1) * sizeof(__int64));
			Pif2Reply[1] = ( unsigned __int64 *)realloc(Pif2Reply[1],(MaxPif2Cmds + 1) * sizeof(__int64));
			Pif2Reply[2] = ( unsigned __int64 *)realloc(Pif2Reply[2],(MaxPif2Cmds + 1) * sizeof(__int64));
			Pif2Reply[3] = ( unsigned __int64 *)realloc(Pif2Reply[3],(MaxPif2Cmds + 1) * sizeof(__int64));
			if (Pif2Reply[0] == NULL || Pif2Reply[1] == NULL ||
				Pif2Reply[2] == NULL || Pif2Reply[3] == NULL) 
			{
				DisplayError(GS(MSG_MEM_ALLOC_ERROR));
				ExitThread(0);
			}
		}
		fgets (buff, 255, pif2db);
		if (buff[0] != ';') {
			if (buff[0] != '\n') {
				sscanf (buff, "0x%08X%08X, 0x%08X%08X, 0x%08X%08X, 0x%08X%08X", 
				((DWORD *)&Pif2Reply[0][cnt])+1, &Pif2Reply[0][cnt], 
				((DWORD *)&Pif2Reply[1][cnt])+1, &Pif2Reply[1][cnt],
				((DWORD *)&Pif2Reply[2][cnt])+1, &Pif2Reply[2][cnt], 
				((DWORD *)&Pif2Reply[3][cnt])+1, &Pif2Reply[3][cnt]);
				cnt++;
			}
		}
	}

	Pif2Reply[0][cnt] = Pif2Reply[1][cnt] = Pif2Reply[2][cnt] = Pif2Reply[3][cnt] = -1;
	
	pif2valid = TRUE;

	fclose (pif2db);
}

void PifRamRead (void) {
	int Channel, CurPos;

	Channel = 0;
	CurPos  = 0;
	
	if (PIF_Ram[0x3F] == 0x2) {
		int cnt = 0;
		char buff[256];
		if (pif2valid == FALSE)
			LoadPIF2 ();
		while (Pif2Reply[0][cnt] != -1) {
			if (Pif2Reply[0][cnt] == *(unsigned __int64 *)&PIF_Ram[48]) {
				if (Pif2Reply[1][cnt] == *(unsigned __int64 *)&PIF_Ram[56]) {
					PIF_Ram[46] = PIF_Ram[47] = 0x00;
					*(unsigned __int64 *)&PIF_Ram[48] = Pif2Reply[2][cnt];
					*(unsigned __int64 *)&PIF_Ram[56] = Pif2Reply[3][cnt];
					cnt = -1;
					break;
				}
			}
			cnt++;
		}
		if (cnt != -1) {
			char buff2[256];
			int count;

			sprintf (buff, "%s :(\r\n\r\nInfo:\r\nP1=%08X%08X P2=%08X%08X\r\n", GS(MSG_PIF2_ERROR),
				*(DWORD *)&PIF_Ram[52],
				*(DWORD *)&PIF_Ram[48],
				*(DWORD *)&PIF_Ram[60],
				*(DWORD *)&PIF_Ram[56]);
			for (count = 48; count < 64; count++) {
				if (count % 4 == 0) { 
					strcat(buff,count == 48?"0x":", 0x");
				}
				sprintf(buff2,"%02X",PIF_Ram[count]);
				strcat(buff,buff2);
			}
			if (!inFullScreen) {
				MessageBox (NULL, buff, GS(MSG_PIF2_TITLE), MB_OK);
			}
		}
		/*
            PIF_Ram[48] = 0x3E; PIF_Ram[49] = 0xC6; PIF_Ram[50] = 0xC0; PIF_Ram[51] = 0x4E;
            PIF_Ram[52] = 0xBD; PIF_Ram[53] = 0x37; PIF_Ram[54] = 0x15; PIF_Ram[55] = 0x55;
            PIF_Ram[56] = 0x5A; PIF_Ram[57] = 0x8C; PIF_Ram[58] = 0x2A; PIF_Ram[59] = 0x8C;
            PIF_Ram[60] = 0xD3; PIF_Ram[61] = 0x71; PIF_Ram[62] = 0x71; PIF_Ram[63] = 0x00;
		*/

		CurPos = 0x40;
	}

	do {
		switch(PIF_Ram[CurPos]) {
		case 0x00: 
			Channel += 1; 
			if (Channel > 6) { CurPos = 0x40; }
			break;
		case 0xFE: CurPos = 0x40; break;
		case 0xFF: break;
		case 0xB4: case 0x56: case 0xB8: break; /* ??? */
		default:
			if ((PIF_Ram[CurPos] & 0xC0) == 0) {
				if (Channel < 4) {
					if (Controllers[Channel].Present && Controllers[Channel].RawData) {
						if (ReadController) { ReadController(Channel,&PIF_Ram[CurPos]); }
					} else {
						ReadControllerCommand(Channel,&PIF_Ram[CurPos]);
					}
				} 
				CurPos += PIF_Ram[CurPos] + (PIF_Ram[CurPos + 1] & 0x3F) + 1;
				Channel += 1;
			} else {
				if (ShowPifRamErrors) { DisplayError("Unknown Command in PifRamRead(%X)",PIF_Ram[CurPos]); }
				CurPos = 0x40;
			}
			break;
		}
		CurPos += 1;
	} while( CurPos < 0x40 );
	if (ReadController) { ReadController(-1,NULL); }
}

void PifRamWrite (void) {
	int Channel, CurPos;

	Channel = 0;

	if( PIF_Ram[0x3F] > 0x1) { 
		switch (PIF_Ram[0x3F]) {
		case 0x08: 
			PIF_Ram[0x3F] = 0; 
			MI_INTR_REG |= MI_INTR_SI;
			SI_STATUS_REG |= SI_STATUS_INTERRUPT;
			CheckInterrupts();
			break;
		case 0x10:
			memset(PifRom,0,0x7C0);
			break;
		case 0x30:
			PIF_Ram[0x3F] = 0x80;		
			break;
		case 0xC0:
			memset(PIF_Ram,0,0x40);
			break;
		default:
			if (ShowPifRamErrors) { DisplayError("Unkown PifRam control: %d",PIF_Ram[0x3F]); }
		}
		return;
	}

	for (CurPos = 0; CurPos < 0x40; CurPos++){
		switch(PIF_Ram[CurPos]) {
		case 0x00: 
			Channel += 1; 
			if (Channel > 6) { CurPos = 0x40; }
			break;
		case 0xFE: CurPos = 0x40; break;
		case 0xFF: break;
		case 0xB4: case 0x56: case 0xB8: break; /* ??? */
		default:
			if ((PIF_Ram[CurPos] & 0xC0) == 0) {
				if (Channel < 4) {
					if (Controllers[Channel].Present && Controllers[Channel].RawData) {
						if (ControllerCommand) { ControllerCommand(Channel,&PIF_Ram[CurPos]); }
					} else {
						ProcessControllerCommand(Channel,&PIF_Ram[CurPos]);
					}
				} else if (Channel == 4) {
					EepromCommand(&PIF_Ram[CurPos]);
				} else {
#ifndef EXTERNAL_RELEASE
					DisplayError("Command on channel 5?");
#endif
				}
				CurPos += PIF_Ram[CurPos] + (PIF_Ram[CurPos + 1] & 0x3F) + 1;
				Channel += 1;
			} else {
				if (ShowPifRamErrors) { DisplayError("Unknown Command in PifRamWrite(%X)",PIF_Ram[CurPos]); }
				CurPos = 0x40;
			}
			break;
		}
	}
	PIF_Ram[0x3F] = 0;
	if (ControllerCommand) { ControllerCommand(-1,NULL); }
}

void ProcessControllerCommand ( int Control, BYTE * Command) {
	switch (Command[2]) {
	case 0x00: // check
	case 0xFF: // reset & check ?
		if ((Command[1] & 0x80) != 0) { break; }
#ifndef EXTERNAL_RELEASE
		if (Command[0] != 1) { DisplayError("What am I meant to do with this Controller Command"); }
		if (Command[1] != 3) { DisplayError("What am I meant to do with this Controller Command"); }
#endif
		if (Controllers[Control].Present == TRUE) {
			Command[3] = 0x05;
			Command[4] = 0x00;
			switch ( Controllers[Control].Plugin) {
			case PLUGIN_RUMBLE_PAK: Command[5] = 1; break;
			case PLUGIN_MEMPAK: Command[5] = 1; break;
			case PLUGIN_RAW: Command[5] = 1; break;
			default: Command[5] = 0; break;
			}
		} else {
			Command[1] |= 0x80;
		}
		break;
	case 0x01: // read controller
#ifndef EXTERNAL_RELEASE
		if (Command[0] != 1) { DisplayError("What am I meant to do with this Controller Command"); }
		if (Command[1] != 4) { DisplayError("What am I meant to do with this Controller Command"); }
#endif
		if (Controllers[Control].Present == FALSE) {
			Command[1] |= 0x80;
		}
		break;
	case 0x02: //read from controller pack
#ifndef EXTERNAL_RELEASE
		if (LogOptions.LogControllerPak) { LogControllerPakData("Read: Before Gettting Results"); }
		if (Command[0] != 3) { DisplayError("What am I meant to do with this Controller Command"); }
		if (Command[1] != 33) { DisplayError("What am I meant to do with this Controller Command"); }
#endif
		if (Controllers[Control].Present == TRUE) {
			DWORD address = ((Command[3] << 8) | Command[4]);
			switch (Controllers[Control].Plugin) {
			case PLUGIN_RUMBLE_PAK:
				memset(&Command[5], (address >= 0x8000 && address < 0x9000) ? 0x80 : 0x00, 0x20);
				Command[0x25] = Mempacks_CalulateCrc(&Command[5]);
				break;
			case PLUGIN_MEMPAK: ReadFromMempak(Control, address, &Command[5]); break;
			case PLUGIN_RAW: if (ControllerCommand) { ControllerCommand(Control, Command); } break;
			default:
				memset(&Command[5], 0, 0x20);
				Command[0x25] = 0;
			}
		} else {
			Command[1] |= 0x80;
		}
#ifndef EXTERNAL_RELEASE
		if (LogOptions.LogControllerPak) { LogControllerPakData("Read: After Gettting Results"); }
#endif
		break;
	case 0x03: //write controller pak
#ifndef EXTERNAL_RELEASE
		if (LogOptions.LogControllerPak) { LogControllerPakData("Write: Before Processing"); }
		if (Command[0] != 35) { DisplayError("What am I meant to do with this Controller Command"); }
		if (Command[1] != 1) { DisplayError("What am I meant to do with this Controller Command"); }
#endif
		
		if (Controllers[Control].Present == TRUE) {
			DWORD address = ((Command[3] << 8) | Command[4]);
			switch (Controllers[Control].Plugin) {
			case PLUGIN_MEMPAK: WriteToMempak(Control, address, &Command[5]); break;
			case PLUGIN_RAW: if (ControllerCommand) { ControllerCommand(Control, Command); } break;
			case PLUGIN_RUMBLE_PAK: 
				if (RumbleCommand != NULL) {
					RumbleCommand(Control, *(BOOL *)(&Command[5]));
					break;
				}
			default:
				Command[0x25] = Mempacks_CalulateCrc(&Command[5]);
			}
		} else {
			Command[1] |= 0x80;
		}
#ifndef EXTERNAL_RELEASE
		if (LogOptions.LogControllerPak) { LogControllerPakData("Write: After Processing"); }
#endif
		break;
	default:
		if (ShowPifRamErrors) { DisplayError("Unknown ControllerCommand %d",Command[2]); }
	}
}

void ReadControllerCommand (int Control, BYTE * Command) {
	switch (Command[2]) {
	case 0x01: // read controller
		if (Controllers[Control].Present == TRUE) {
#ifndef EXTERNAL_RELEASE
			if (Command[0] != 1) { DisplayError("What am I meant to do with this Controller Command"); }
			if (Command[1] != 4) { DisplayError("What am I meant to do with this Controller Command"); }
#endif
			if (GetKeys) {
				BUTTONS Keys;
				
				GetKeys(Control,&Keys);
				*(DWORD *)&Command[3] = Keys.Value;
			} else {
				*(DWORD *)&Command[3] = 0;
			}
		}
		break;
	case 0x02: //read from controller pack
		if (Controllers[Control].Present == TRUE) {
			switch (Controllers[Control].Plugin) {
			case PLUGIN_RAW: if (ControllerCommand) { ReadController(Control, Command); } break;
			}
		} 
		break;
	case 0x03: //write controller pak
		if (Controllers[Control].Present == TRUE) {
			switch (Controllers[Control].Plugin) {
			case PLUGIN_RAW: if (ControllerCommand) { ReadController(Control, Command); } break;
			}
		}
		break;
	}
}

int LoadPifRom(int country) {
	char path_buffer[_MAX_PATH], drive[_MAX_DRIVE] ,dir[_MAX_DIR];
	char fname[_MAX_FNAME],ext[_MAX_EXT], PifRomName[255];
	HANDLE hPifFile;
	DWORD dwRead;

	GetModuleFileName(NULL,path_buffer,sizeof(path_buffer));
	_splitpath( path_buffer, drive, dir, fname, ext );

	switch (country) {
	case 0x44: //Germany
	case 0x46: //french
	case 0x49: //Italian
	case 0x50: //Europe
	case 0x53: //Spanish
	case 0x55: //Australia
	case 0x58: // X (PAL)
	case 0x59: // X (PAL)
		sprintf(PifRomName,"%s%sPifrom\\pifpal.raw",drive,dir);
		break;
	case 0: //None
	case 0x37: // 7 (Beta)
	case 0x41: // ????
	case 0x45: //USA
	case 0x4A: //Japan
		sprintf(PifRomName,"%s%sPifrom\\pifntsc.raw",drive,dir);
		break;
	default:
		DisplayError(GS(MSG_UNKNOWN_COUNTRY));
	}
	

	hPifFile = CreateFile(PifRomName,GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,
		FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, NULL);
	if (hPifFile == INVALID_HANDLE_VALUE) {
		memset(PifRom,0,0x7C0);
		return FALSE;
	}
	SetFilePointer(hPifFile,0,NULL,FILE_BEGIN);
	ReadFile(hPifFile,PifRom,0x7C0,&dwRead,NULL);	
	CloseHandle( hPifFile );
	return TRUE;
}