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/*
Copyright 2016-2020 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/.
*/
#ifndef DSI_SD_H
#define DSI_SD_H
#include <string.h>
#include "FIFO.h"
class DSi_SDDevice;
class DSi_SDHost
{
public:
DSi_SDHost(u32 num);
~DSi_SDHost();
void Reset();
void DoSavestate(Savestate* file);
static void FinishRX(u32 param);
static void FinishTX(u32 param);
void SendResponse(u32 val, bool last);
u32 DataRX(u8* data, u32 len);
u32 DataTX(u8* data, u32 len);
u32 GetTransferrableLen(u32 len);
void CheckRX();
void CheckTX();
bool TXReq;
void SetCardIRQ();
u16 Read(u32 addr);
void Write(u32 addr, u16 val);
u16 ReadFIFO16();
void WriteFIFO16(u16 val);
u32 ReadFIFO32();
void WriteFIFO32(u32 val);
void UpdateFIFO32();
void CheckSwapFIFO();
private:
u32 Num;
u16 PortSelect;
u16 SoftReset;
u16 SDClock;
u16 SDOption;
u32 IRQStatus; // IF
u32 IRQMask; // ~IE
u16 CardIRQStatus;
u16 CardIRQMask;
u16 CardIRQCtl;
u16 DataCtl;
u16 Data32IRQ;
u32 DataMode; // 0=16bit 1=32bit
u16 BlockCount16, BlockCount32, BlockCountInternal;
u16 BlockLen16, BlockLen32;
u16 StopAction;
u16 Command;
u32 Param;
u16 ResponseBuffer[8];
FIFO<u16>* DataFIFO[2];
u32 CurFIFO; // FIFO accessible for read/write
FIFO<u32>* DataFIFO32;
DSi_SDDevice* Ports[2];
void UpdateData32IRQ();
void ClearIRQ(u32 irq);
void SetIRQ(u32 irq);
void UpdateIRQ(u32 oldmask);
void UpdateCardIRQ(u16 oldmask);
};
class DSi_SDDevice
{
public:
DSi_SDDevice(DSi_SDHost* host) { Host = host; IRQ = false; }
~DSi_SDDevice() {}
virtual void Reset() = 0;
virtual void SendCMD(u8 cmd, u32 param) = 0;
virtual void ContinueTransfer() = 0;
bool IRQ;
protected:
DSi_SDHost* Host;
};
class DSi_MMCStorage : public DSi_SDDevice
{
public:
DSi_MMCStorage(DSi_SDHost* host, bool internal, const char* path);
~DSi_MMCStorage();
void Reset();
void SetCID(u8* cid) { memcpy(CID, cid, 16); }
void SendCMD(u8 cmd, u32 param);
void SendACMD(u8 cmd, u32 param);
void ContinueTransfer();
private:
bool Internal;
char FilePath[1024];
FILE* File;
u8 CID[16];
u8 CSD[16];
u32 CSR;
u32 OCR;
u32 RCA;
u8 SCR[8];
u8 SSR[64];
u32 BlockSize;
u64 RWAddress;
u32 RWCommand;
void SetState(u32 state) { CSR &= ~(0xF << 9); CSR |= (state << 9); }
u32 ReadBlock(u64 addr);
u32 WriteBlock(u64 addr);
};
#endif // DSI_SD_H
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