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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/*
Copyright 2016-2023 melonDS team
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 <cstring>
#include <variant>
#include "FIFO.h"
#include "FATStorage.h"
#include "DSi_NAND.h"
#include "Savestate.h"
namespace melonDS
{
class DSi_SDDevice;
class DSi;
using Nothing = std::monostate;
using DSiStorage = std::variant<std::monostate, FATStorage, DSi_NAND::NANDImage>;
class DSi_SDHost
{
public:
/// Creates an SDMMC host.
DSi_SDHost(melonDS::DSi& dsi, DSi_NAND::NANDImage&& nand, std::optional<FATStorage>&& sdcard = std::nullopt) noexcept;
/// Creates an SDIO host
explicit DSi_SDHost(melonDS::DSi& dsi) noexcept;
~DSi_SDHost();
void Reset();
void DoSavestate(Savestate* file);
void FinishRX(u32 param);
void FinishTX(u32 param);
void SendResponse(u32 val, bool last);
u32 DataRX(const u8* data, u32 len);
u32 DataTX(u8* data, u32 len);
u32 GetTransferrableLen(u32 len) const;
void CheckRX();
void CheckTX();
bool TXReq;
void SetCardIRQ();
[[nodiscard]] FATStorage* GetSDCard() noexcept;
[[nodiscard]] const FATStorage* GetSDCard() const noexcept;
[[nodiscard]] DSi_NAND::NANDImage* GetNAND() noexcept;
[[nodiscard]] const DSi_NAND::NANDImage* GetNAND() const noexcept;
void SetSDCard(FATStorage&& sdcard) noexcept;
void SetSDCard(std::optional<FATStorage>&& sdcard) noexcept;
void SetNAND(DSi_NAND::NANDImage&& nand) noexcept;
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:
melonDS::DSi& DSi;
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];
std::array<std::unique_ptr<DSi_SDDevice>, 2> Ports {};
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; ReadOnly = false; }
virtual ~DSi_SDDevice() {}
virtual void Reset() = 0;
virtual void DoSavestate(Savestate* file) = 0;
virtual void SendCMD(u8 cmd, u32 param) = 0;
virtual void ContinueTransfer() = 0;
bool IRQ;
bool ReadOnly;
protected:
DSi_SDHost* Host;
};
class DSi_MMCStorage : public DSi_SDDevice
{
public:
DSi_MMCStorage(melonDS::DSi& dsi, DSi_SDHost* host, DSi_NAND::NANDImage&& nand) noexcept;
DSi_MMCStorage(melonDS::DSi& dsi, DSi_SDHost* host, FATStorage&& sdcard) noexcept;
~DSi_MMCStorage() override;
[[nodiscard]] FATStorage* GetSDCard() noexcept { return std::get_if<FATStorage>(&Storage); }
[[nodiscard]] const FATStorage* GetSDCard() const noexcept { return std::get_if<FATStorage>(&Storage); }
[[nodiscard]] DSi_NAND::NANDImage* GetNAND() noexcept { return std::get_if<DSi_NAND::NANDImage>(&Storage); }
[[nodiscard]] const DSi_NAND::NANDImage* GetNAND() const noexcept { return std::get_if<DSi_NAND::NANDImage>(&Storage); }
void SetNAND(DSi_NAND::NANDImage&& nand) noexcept { Storage = std::move(nand); }
void SetSDCard(FATStorage&& sdcard) noexcept { Storage = std::move(sdcard); }
void SetSDCard(std::optional<FATStorage>&& sdcard) noexcept
{
if (sdcard)
{ // If we're setting a new SD card...
Storage = std::move(*sdcard);
sdcard = std::nullopt;
}
else
{
Storage = Nothing();
}
}
void SetStorage(DSiStorage&& storage) noexcept
{
Storage = std::move(storage);
storage = Nothing();
// not sure if a moved-from variant is empty or contains a moved-from object;
// better to be safe than sorry
}
void Reset() override;
void DoSavestate(Savestate* file) override;
void SetCID(const u8* cid) { memcpy(CID, cid, sizeof(CID)); }
void SendCMD(u8 cmd, u32 param) override;
void SendACMD(u8 cmd, u32 param);
void ContinueTransfer() override;
private:
static constexpr u8 DSiSDCardCID[16] = {0xBD, 0x12, 0x34, 0x56, 0x78, 0x03, 0x4D, 0x30, 0x30, 0x46, 0x50, 0x41, 0x00, 0x00, 0x15, 0x00};
melonDS::DSi& DSi;
DSiStorage Storage;
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
|