1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
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];
DSi_SDDevice* Ports[2];
u32 CurFIFO; // FIFO accessible for read/write
FIFO<u16, 0x100> DataFIFO[2];
FIFO<u32, 0x80> DataFIFO32;
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; }
virtual ~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
|