mirror of https://github.com/PCSX2/pcsx2.git
251 lines
5.8 KiB
C++
251 lines
5.8 KiB
C++
/* PCSX2 - PS2 Emulator for PCs
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* Copyright (C) 2002-2022 PCSX2 Dev Team
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with PCSX2.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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// Huge thanks to PSI for his work reversing the PS2, his documentation on SIO2 pretty much saved
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// this entire implementation. https://psi-rockin.github.io/ps2tek/#sio2registers
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#pragma once
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#include "SioTypes.h"
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#include "MemoryCardFile.h"
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#include <array>
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#include <deque>
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struct _mcd
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{
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u8 currentCommand;
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u8 term; // terminator value;
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bool goodSector; // xor sector check
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u8 msb;
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u8 lsb;
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u32 sectorAddr; // read/write sector address
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u32 transferAddr; // Transfer address
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std::vector<u8> buf; // Buffer for reading and writing
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u8 FLAG; // for PSX;
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u8 port; // port
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u8 slot; // and slot for this memcard
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size_t autoEjectTicks;
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void GetSizeInfo(McdSizeInfo &info)
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{
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FileMcd_GetSizeInfo(port, slot, &info);
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}
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bool IsPSX()
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{
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return FileMcd_IsPSX(port, slot);
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}
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void EraseBlock()
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{
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//DevCon.WriteLn("Memcard Erase (sectorAddr = %08X)", sectorAddr);
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FileMcd_EraseBlock(port, slot, transferAddr);
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}
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// Read from memorycard to dest
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void Read(u8 *dest, int size)
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{
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//DevCon.WriteLn("Memcard Read (sectorAddr = %08X)", sectorAddr);
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FileMcd_Read(port, slot, dest, transferAddr, size);
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}
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// Write to memorycard from src
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void Write(u8 *src, int size)
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{
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//DevCon.WriteLn("Memcard Write (sectorAddr = %08X)", sectorAddr);
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FileMcd_Save(port, slot, src,transferAddr, size);
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}
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bool IsPresent()
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{
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return FileMcd_IsPresent(port, slot);
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}
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u8 DoXor()
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{
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u8 ret = msb ^ lsb;
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for (const u8 byte : buf)
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{
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ret ^= byte;
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}
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return ret;
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}
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u64 GetChecksum()
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{
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return FileMcd_GetCRC(port, slot);
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}
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void NextFrame() {
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FileMcd_NextFrame( port, slot );
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}
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int ReIndex(const std::string& filter) {
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return FileMcd_ReIndex(port, slot, filter);
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}
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};
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class Sio0
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{
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private:
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u32 txData; // 0x1f801040
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u32 rxData; // 0x1f801040
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u32 stat; // 0x1f801044
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u16 mode; // 0x1f801048
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u16 ctrl; // 0x1f80104a
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u16 baud; // 0x1f80104e
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void ClearStatAcknowledge();
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public:
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u8 flag = 0;
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SioStage sioStage = SioStage::IDLE;
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u8 sioMode = SioMode::NOT_SET;
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u8 sioCommand = 0;
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bool padStarted = false;
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bool rxDataSet = false;
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u8 port = 0;
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u8 slot = 0;
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Sio0();
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~Sio0();
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void SoftReset();
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void FullReset();
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void Acknowledge();
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void Interrupt(Sio0Interrupt sio0Interrupt);
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u8 GetTxData();
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u8 GetRxData();
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u32 GetStat();
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u16 GetMode();
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u16 GetCtrl();
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u16 GetBaud();
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void SetTxData(u8 value);
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void SetRxData(u8 value);
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void SetStat(u32 value);
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void SetMode(u16 value);
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void SetCtrl(u16 value);
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void SetBaud(u16 value);
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bool IsPadCommand(u8 command);
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bool IsMemcardCommand(u8 command);
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bool IsPocketstationCommand(u8 command);
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u8 Pad(u8 value);
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u8 Memcard(u8 value);
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};
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class Sio2
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{
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private:
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void UpdateInputRecording(u8& dataIn, u8& dataOut);
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public:
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std::array<u32, 16> send3; // 0x1f808200 - 0x1f80823f
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// SEND1 and SEND2 are an unusual bunch. It's not entirely clear just from
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// documentation but these registers almost seem like they are the same thing;
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// when bit 2 is set, SEND2 is being read/written. When bit 2 isn't set, it is
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// SEND1. Their use is not really known, either.
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std::array<u32, 4> send1; // 0x1f808240 - 0x1f80825f
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std::array<u32, 4> send2; // 0x1f808240 - 0x1f80825f
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u32 dataIn; // 0x1f808260
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u32 dataOut; // 0x1f808264
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u32 ctrl; // 0x1f808268
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u32 recv1; // 0x1f80826c
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u32 recv2; // 0x1f808270
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u32 recv3; // 0x1f808274
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u32 unknown1; // 0x1f808278
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u32 unknown2; // 0x1f80827c
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u32 iStat; // 0x1f808280
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u8 port = 0;
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u8 slot = 0;
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// The current working index of SEND3. The SEND3 register is a 16 position
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// array of command descriptors. Each descriptor describes the port the command
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// is targeting, as well as the length of the command in bytes.
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bool send3Read = false;
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size_t send3Position = 0;
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size_t commandLength = 0;
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size_t processedLength = 0;
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// Tracks the size of a single block of DMA11/DMA12 data. psxDma11 will set this prior
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// to doing writes, and Sio2::SetSend3 will clear this to ensure a non-DMA write into SIO2
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// does not accidentally use dmaBlockSize.
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size_t dmaBlockSize = 0;
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bool send3Complete = false;
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Sio2();
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~Sio2();
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void SoftReset();
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void FullReset();
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void Interrupt();
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void SetCtrl(u32 value);
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void SetSend3(size_t position, u32 value);
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void SetRecv1(u32 value);
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void Pad();
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void Multitap();
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void Infrared();
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void Memcard();
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void Write(u8 data);
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u8 Read();
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};
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extern std::deque<u8> fifoIn;
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extern std::deque<u8> fifoOut;
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extern Sio0 sio0;
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extern Sio2 sio2;
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extern _mcd mcds[2][4];
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extern _mcd *mcd;
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extern void sioNextFrame();
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/// Converts a global pad index to a multitap port and slot.
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extern std::tuple<u32, u32> sioConvertPadToPortAndSlot(u32 index);
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/// Converts a multitap port and slot to a global pad index.
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extern u32 sioConvertPortAndSlotToPad(u32 port, u32 slot);
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/// Returns true if the given pad index is a multitap slot.
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extern bool sioPadIsMultitapSlot(u32 index);
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extern bool sioPortAndSlotIsMultitap(u32 port, u32 slot);
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extern void sioSetGameSerial(const std::string& serial);
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namespace AutoEject
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{
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extern void CountDownTicks();
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extern void Set(size_t port, size_t slot);
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extern void Clear(size_t port, size_t slot);
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extern void SetAll();
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extern void ClearAll();
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} |