878 lines
20 KiB
C++
878 lines
20 KiB
C++
/*
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Copyright 2016-2023 melonDS team
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This file is part of melonDS.
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melonDS is free software: you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with melonDS. If not, see http://www.gnu.org/licenses/.
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*/
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include "NDS.h"
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#include "GBACart.h"
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#include "CRC32.h"
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#include "Platform.h"
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#include "Utils.h"
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namespace melonDS
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{
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using Platform::Log;
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using Platform::LogLevel;
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namespace GBACart
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{
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const char SOLAR_SENSOR_GAMECODES[10][5] =
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{
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"U3IJ", // Bokura no Taiyou - Taiyou Action RPG (Japan)
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"U3IE", // Boktai - The Sun Is in Your Hand (USA)
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"U3IP", // Boktai - The Sun Is in Your Hand (Europe)
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"U32J", // Zoku Bokura no Taiyou - Taiyou Shounen Django (Japan)
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"U32E", // Boktai 2 - Solar Boy Django (USA)
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"U32P", // Boktai 2 - Solar Boy Django (Europe)
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"U33J", // Shin Bokura no Taiyou - Gyakushuu no Sabata (Japan)
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"A3IJ" // Boktai - The Sun Is in Your Hand (USA) (Sample)
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};
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CartCommon::CartCommon(GBACart::CartType type) : CartType(type)
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{
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}
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void CartCommon::Reset()
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{
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}
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void CartCommon::DoSavestate(Savestate* file)
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{
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file->Section("GBCS");
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}
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void CartCommon::SetSaveMemory(const u8* savedata, u32 savelen)
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{
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}
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int CartCommon::SetInput(int num, bool pressed)
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{
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return -1;
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}
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u16 CartCommon::ROMRead(u32 addr) const
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{
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return 0;
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}
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void CartCommon::ROMWrite(u32 addr, u16 val)
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{
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}
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u8 CartCommon::SRAMRead(u32 addr)
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{
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return 0;
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}
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void CartCommon::SRAMWrite(u32 addr, u8 val)
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{
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}
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u8* CartCommon::GetSaveMemory() const
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{
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return nullptr;
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}
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u32 CartCommon::GetSaveMemoryLength() const
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{
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return 0;
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}
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CartGame::CartGame(const u8* rom, u32 len, const u8* sram, u32 sramlen, GBACart::CartType type) :
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CartGame(CopyToUnique(rom, len), len, CopyToUnique(sram, sramlen), sramlen, type)
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{
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}
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CartGame::CartGame(std::unique_ptr<u8[]>&& rom, u32 len, std::unique_ptr<u8[]>&& sram, u32 sramlen, GBACart::CartType type) :
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CartCommon(type),
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ROM(std::move(rom)),
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ROMLength(len),
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SRAM(std::move(sram)),
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SRAMLength(sramlen)
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{
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if (SRAM && SRAMLength)
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{
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SetupSave(sramlen);
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}
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}
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CartGame::~CartGame() = default;
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// unique_ptr cleans up the allocated memory
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u32 CartGame::Checksum() const
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{
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u32 crc = CRC32(ROM.get(), 0xC0, 0);
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// TODO: hash more contents?
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return crc;
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}
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void CartGame::Reset()
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{
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memset(&GPIO, 0, sizeof(GPIO));
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}
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void CartGame::DoSavestate(Savestate* file)
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{
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CartCommon::DoSavestate(file);
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file->Var16(&GPIO.control);
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file->Var16(&GPIO.data);
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file->Var16(&GPIO.direction);
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u32 oldlen = SRAMLength;
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file->Var32(&SRAMLength);
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if (SRAMLength != oldlen)
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{
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// reallocate save memory
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SRAM = SRAMLength ? std::make_unique<u8[]>(SRAMLength) : nullptr;
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}
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if (SRAMLength)
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{
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// fill save memory if data is present
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file->VarArray(SRAM.get(), SRAMLength);
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}
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else
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{
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// no save data, clear the current state
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SRAMType = SaveType::S_NULL;
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SRAM = nullptr;
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return;
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}
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// persist some extra state info
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file->Var8(&SRAMFlashState.bank);
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file->Var8(&SRAMFlashState.cmd);
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file->Var8(&SRAMFlashState.device);
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file->Var8(&SRAMFlashState.manufacturer);
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file->Var8(&SRAMFlashState.state);
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file->Var8((u8*)&SRAMType);
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if ((!file->Saving) && SRAM)
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Platform::WriteGBASave(SRAM.get(), SRAMLength, 0, SRAMLength);
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}
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void CartGame::SetupSave(u32 type)
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{
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// TODO: have type be determined from some list, like in NDSCart
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// and not this gross hack!!
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SRAMLength = type;
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switch (SRAMLength)
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{
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case 512:
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SRAMType = S_EEPROM4K;
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break;
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case 8192:
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SRAMType = S_EEPROM64K;
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break;
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case 32768:
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SRAMType = S_SRAM256K;
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break;
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case 65536:
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SRAMType = S_FLASH512K;
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break;
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case 128*1024:
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case (128*1024 + 0x10): // .sav file with appended real time clock data (ex: emulator mGBA)
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SRAMType = S_FLASH1M;
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break;
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case 0:
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SRAMType = S_NULL;
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break;
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default:
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Log(LogLevel::Warn, "!! BAD GBA SAVE LENGTH %d\n", SRAMLength);
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}
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if (SRAMType == S_FLASH512K)
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{
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// Panasonic 64K chip
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SRAMFlashState.device = 0x1B;
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SRAMFlashState.manufacturer = 0x32;
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}
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else if (SRAMType == S_FLASH1M)
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{
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// Sanyo 128K chip
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SRAMFlashState.device = 0x13;
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SRAMFlashState.manufacturer = 0x62;
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}
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}
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void CartGame::SetSaveMemory(const u8* savedata, u32 savelen)
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{
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SetupSave(savelen);
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u32 len = std::min(savelen, SRAMLength);
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memcpy(SRAM.get(), savedata, len);
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Platform::WriteGBASave(savedata, len, 0, len);
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}
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u16 CartGame::ROMRead(u32 addr) const
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{
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addr &= 0x01FFFFFF;
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if (addr >= 0xC4 && addr < 0xCA)
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{
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if (GPIO.control & 0x1)
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{
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switch (addr)
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{
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case 0xC4: return GPIO.data;
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case 0xC6: return GPIO.direction;
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case 0xC8: return GPIO.control;
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}
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}
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else
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return 0;
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}
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// CHECKME: does ROM mirror?
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if (addr < ROMLength)
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return *(u16*)&ROM[addr];
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return 0;
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}
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void CartGame::ROMWrite(u32 addr, u16 val)
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{
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addr &= 0x01FFFFFF;
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switch (addr)
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{
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case 0xC4:
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GPIO.data &= ~GPIO.direction;
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GPIO.data |= val & GPIO.direction;
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ProcessGPIO();
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break;
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case 0xC6:
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GPIO.direction = val;
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break;
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case 0xC8:
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GPIO.control = val;
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break;
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default:
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Log(LogLevel::Warn, "Unknown GBA GPIO write 0x%02X @ 0x%04X\n", val, addr);
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break;
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}
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}
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u8 CartGame::SRAMRead(u32 addr)
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{
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addr &= 0xFFFF;
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switch (SRAMType)
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{
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case S_EEPROM4K:
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case S_EEPROM64K:
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return SRAMRead_EEPROM(addr);
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case S_FLASH512K:
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case S_FLASH1M:
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return SRAMRead_FLASH(addr);
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case S_SRAM256K:
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return SRAMRead_SRAM(addr);
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default:
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break;
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}
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return 0xFF;
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}
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void CartGame::SRAMWrite(u32 addr, u8 val)
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{
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addr &= 0xFFFF;
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switch (SRAMType)
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{
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case S_EEPROM4K:
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case S_EEPROM64K:
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return SRAMWrite_EEPROM(addr, val);
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case S_FLASH512K:
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case S_FLASH1M:
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return SRAMWrite_FLASH(addr, val);
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case S_SRAM256K:
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return SRAMWrite_SRAM(addr, val);
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default:
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break;
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}
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}
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u8* CartGame::GetSaveMemory() const
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{
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return SRAM.get();
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}
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u32 CartGame::GetSaveMemoryLength() const
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{
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return SRAMLength;
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}
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void CartGame::ProcessGPIO()
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{
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}
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u8 CartGame::SRAMRead_EEPROM(u32 addr)
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{
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return 0;
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}
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void CartGame::SRAMWrite_EEPROM(u32 addr, u8 val)
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{
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// TODO: could be used in homebrew?
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}
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// mostly ported from DeSmuME
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u8 CartGame::SRAMRead_FLASH(u32 addr)
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{
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if (SRAMFlashState.cmd == 0) // no cmd
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{
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return *(u8*)&SRAM[addr + 0x10000 * SRAMFlashState.bank];
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}
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switch (SRAMFlashState.cmd)
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{
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case 0x90: // chip ID
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if (addr == 0x0000) return SRAMFlashState.manufacturer;
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if (addr == 0x0001) return SRAMFlashState.device;
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break;
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case 0xF0: // terminate command (TODO: break if non-Macronix chip and not at the end of an ID call?)
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SRAMFlashState.state = 0;
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SRAMFlashState.cmd = 0;
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break;
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case 0xA0: // write command
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break; // ignore here, handled in Write_Flash()
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case 0xB0: // bank switching (128K only)
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break; // ignore here, handled in Write_Flash()
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default:
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Log(LogLevel::Warn, "GBACart_SRAM::Read_Flash: unknown command 0x%02X @ 0x%04X\n", SRAMFlashState.cmd, addr);
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break;
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}
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return 0xFF;
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}
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// mostly ported from DeSmuME
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void CartGame::SRAMWrite_FLASH(u32 addr, u8 val)
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{
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switch (SRAMFlashState.state)
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{
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case 0x00:
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if (addr == 0x5555)
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{
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if (val == 0xF0)
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{
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// reset
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SRAMFlashState.state = 0;
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SRAMFlashState.cmd = 0;
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return;
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}
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else if (val == 0xAA)
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{
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SRAMFlashState.state = 1;
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return;
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}
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}
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if (addr == 0x0000)
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{
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if (SRAMFlashState.cmd == 0xB0)
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{
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// bank switching
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SRAMFlashState.bank = val;
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SRAMFlashState.cmd = 0;
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return;
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}
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}
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break;
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case 0x01:
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if (addr == 0x2AAA && val == 0x55)
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{
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SRAMFlashState.state = 2;
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return;
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}
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SRAMFlashState.state = 0;
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break;
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case 0x02:
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if (addr == 0x5555)
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{
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// send command
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switch (val)
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{
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case 0x80: // erase
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SRAMFlashState.state = 0x80;
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break;
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case 0x90: // chip ID
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SRAMFlashState.state = 0x90;
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break;
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case 0xA0: // write
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SRAMFlashState.state = 0;
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break;
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default:
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SRAMFlashState.state = 0;
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break;
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}
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SRAMFlashState.cmd = val;
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return;
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}
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SRAMFlashState.state = 0;
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break;
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// erase
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case 0x80:
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if (addr == 0x5555 && val == 0xAA)
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{
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SRAMFlashState.state = 0x81;
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return;
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}
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SRAMFlashState.state = 0;
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break;
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case 0x81:
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if (addr == 0x2AAA && val == 0x55)
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{
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SRAMFlashState.state = 0x82;
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return;
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}
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SRAMFlashState.state = 0;
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break;
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case 0x82:
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if (val == 0x30)
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{
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u32 start_addr = addr + 0x10000 * SRAMFlashState.bank;
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memset((u8*)&SRAM[start_addr], 0xFF, 0x1000);
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Platform::WriteGBASave(SRAM.get(), SRAMLength, start_addr, 0x1000);
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}
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SRAMFlashState.state = 0;
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SRAMFlashState.cmd = 0;
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return;
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// chip ID
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case 0x90:
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if (addr == 0x5555 && val == 0xAA)
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{
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SRAMFlashState.state = 0x91;
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return;
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}
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SRAMFlashState.state = 0;
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break;
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case 0x91:
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if (addr == 0x2AAA && val == 0x55)
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{
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SRAMFlashState.state = 0x92;
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return;
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}
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SRAMFlashState.state = 0;
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break;
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case 0x92:
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SRAMFlashState.state = 0;
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SRAMFlashState.cmd = 0;
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return;
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default:
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break;
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}
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if (SRAMFlashState.cmd == 0xA0) // write
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{
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SRAMWrite_SRAM(addr + 0x10000 * SRAMFlashState.bank, val);
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SRAMFlashState.state = 0;
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SRAMFlashState.cmd = 0;
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return;
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}
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Log(LogLevel::Debug, "GBACart_SRAM::Write_Flash: unknown write 0x%02X @ 0x%04X (state: 0x%02X)\n",
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val, addr, SRAMFlashState.state);
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}
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u8 CartGame::SRAMRead_SRAM(u32 addr)
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{
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if (addr >= SRAMLength) return 0xFF;
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return SRAM[addr];
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}
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void CartGame::SRAMWrite_SRAM(u32 addr, u8 val)
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{
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if (addr >= SRAMLength) return;
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u8 prev = *(u8*)&SRAM[addr];
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if (prev != val)
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{
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*(u8*)&SRAM[addr] = val;
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// TODO: optimize this!!
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Platform::WriteGBASave(SRAM.get(), SRAMLength, addr, 1);
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}
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}
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CartGameSolarSensor::CartGameSolarSensor(const u8* rom, u32 len, const u8* sram, u32 sramlen) :
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CartGameSolarSensor(CopyToUnique(rom, len), len, CopyToUnique(sram, sramlen), sramlen)
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{
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}
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CartGameSolarSensor::CartGameSolarSensor(std::unique_ptr<u8[]>&& rom, u32 len, std::unique_ptr<u8[]>&& sram, u32 sramlen) :
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CartGame(std::move(rom), len, std::move(sram), sramlen, CartType::GameSolarSensor)
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{
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}
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const int CartGameSolarSensor::kLuxLevels[11] = {0, 5, 11, 18, 27, 42, 62, 84, 109, 139, 183};
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void CartGameSolarSensor::Reset()
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{
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CartGame::Reset();
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LightEdge = false;
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LightCounter = 0;
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LightSample = 0xFF;
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LightLevel = 0;
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}
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void CartGameSolarSensor::DoSavestate(Savestate* file)
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{
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CartGame::DoSavestate(file);
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file->Var8((u8*)&LightEdge);
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file->Var8(&LightCounter);
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file->Var8(&LightSample);
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file->Var8(&LightLevel);
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}
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int CartGameSolarSensor::SetInput(int num, bool pressed)
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{
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if (!pressed) return -1;
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if (num == Input_SolarSensorDown)
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{
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if (LightLevel > 0)
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LightLevel--;
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return LightLevel;
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}
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else if (num == Input_SolarSensorUp)
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{
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if (LightLevel < 10)
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LightLevel++;
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return LightLevel;
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}
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return -1;
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}
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void CartGameSolarSensor::ProcessGPIO()
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{
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if (GPIO.data & 4) return; // Boktai chip select
|
|
if (GPIO.data & 2) // Reset
|
|
{
|
|
u8 prev = LightSample;
|
|
LightCounter = 0;
|
|
LightSample = (0xFF - (0x16 + kLuxLevels[LightLevel]));
|
|
Log(LogLevel::Debug, "Solar sensor reset (sample: 0x%02X -> 0x%02X)\n", prev, LightSample);
|
|
}
|
|
if (GPIO.data & 1 && LightEdge) LightCounter++;
|
|
|
|
LightEdge = !(GPIO.data & 1);
|
|
|
|
bool sendBit = LightCounter >= LightSample;
|
|
if (GPIO.control & 1)
|
|
{
|
|
GPIO.data = (GPIO.data & GPIO.direction) | ((sendBit << 3) & ~GPIO.direction & 0xF);
|
|
}
|
|
}
|
|
|
|
|
|
CartRAMExpansion::CartRAMExpansion() : CartCommon(RAMExpansion)
|
|
{
|
|
}
|
|
|
|
CartRAMExpansion::~CartRAMExpansion() = default;
|
|
|
|
void CartRAMExpansion::Reset()
|
|
{
|
|
memset(RAM, 0xFF, sizeof(RAM));
|
|
RAMEnable = 1;
|
|
}
|
|
|
|
void CartRAMExpansion::DoSavestate(Savestate* file)
|
|
{
|
|
CartCommon::DoSavestate(file);
|
|
|
|
file->VarArray(RAM, sizeof(RAM));
|
|
file->Var16(&RAMEnable);
|
|
}
|
|
|
|
u16 CartRAMExpansion::ROMRead(u32 addr) const
|
|
{
|
|
addr &= 0x01FFFFFF;
|
|
|
|
if (addr < 0x01000000)
|
|
{
|
|
switch (addr)
|
|
{
|
|
case 0xB0: return 0xFFFF;
|
|
case 0xB2: return 0x0000;
|
|
case 0xB4: return 0x2400;
|
|
case 0xB6: return 0x2424;
|
|
case 0xB8: return 0xFFFF;
|
|
case 0xBA: return 0xFFFF;
|
|
case 0xBC: return 0xFFFF;
|
|
case 0xBE: return 0x7FFF;
|
|
|
|
case 0x1FFFC: return 0xFFFF;
|
|
case 0x1FFFE: return 0x7FFF;
|
|
|
|
case 0x240000: return RAMEnable;
|
|
case 0x240002: return 0x0000;
|
|
}
|
|
|
|
return 0xFFFF;
|
|
}
|
|
else if (addr < 0x01800000)
|
|
{
|
|
if (!RAMEnable) return 0xFFFF;
|
|
|
|
return *(u16*)&RAM[addr & 0x7FFFFF];
|
|
}
|
|
|
|
return 0xFFFF;
|
|
}
|
|
|
|
void CartRAMExpansion::ROMWrite(u32 addr, u16 val)
|
|
{
|
|
addr &= 0x01FFFFFF;
|
|
|
|
if (addr < 0x01000000)
|
|
{
|
|
switch (addr)
|
|
{
|
|
case 0x240000:
|
|
RAMEnable = val & 0x0001;
|
|
return;
|
|
}
|
|
}
|
|
else if (addr < 0x01800000)
|
|
{
|
|
if (!RAMEnable) return;
|
|
|
|
*(u16*)&RAM[addr & 0x7FFFFF] = val;
|
|
}
|
|
}
|
|
|
|
GBACartSlot::GBACartSlot(std::unique_ptr<CartCommon>&& cart) noexcept : Cart(std::move(cart))
|
|
{
|
|
}
|
|
|
|
void GBACartSlot::Reset() noexcept
|
|
{
|
|
if (Cart) Cart->Reset();
|
|
}
|
|
|
|
void GBACartSlot::DoSavestate(Savestate* file) noexcept
|
|
{
|
|
file->Section("GBAC"); // Game Boy Advance Cartridge
|
|
|
|
// little state here
|
|
// no need to save OpenBusDecay, it will be set later
|
|
|
|
u32 carttype = 0;
|
|
u32 cartchk = 0;
|
|
if (Cart)
|
|
{
|
|
carttype = Cart->Type();
|
|
cartchk = Cart->Checksum();
|
|
}
|
|
|
|
if (file->Saving)
|
|
{
|
|
file->Var32(&carttype);
|
|
file->Var32(&cartchk);
|
|
}
|
|
else
|
|
{
|
|
u32 savetype;
|
|
file->Var32(&savetype);
|
|
if (savetype != carttype) return;
|
|
|
|
u32 savechk;
|
|
file->Var32(&savechk);
|
|
if (savechk != cartchk) return;
|
|
}
|
|
|
|
if (Cart) Cart->DoSavestate(file);
|
|
}
|
|
|
|
std::unique_ptr<CartCommon> ParseROM(std::unique_ptr<u8[]>&& romdata, u32 romlen)
|
|
{
|
|
return ParseROM(std::move(romdata), romlen, nullptr, 0);
|
|
}
|
|
|
|
std::unique_ptr<CartCommon> ParseROM(const u8* romdata, u32 romlen, const u8* sramdata, u32 sramlen)
|
|
{
|
|
auto [romcopy, romcopylen] = PadToPowerOf2(romdata, romlen);
|
|
|
|
return ParseROM(std::move(romcopy), romcopylen, CopyToUnique(sramdata, sramlen), sramlen);
|
|
}
|
|
|
|
std::unique_ptr<CartCommon> ParseROM(const u8* romdata, u32 romlen)
|
|
{
|
|
return ParseROM(romdata, romlen, nullptr, 0);
|
|
}
|
|
|
|
std::unique_ptr<CartCommon> ParseROM(std::unique_ptr<u8[]>&& romdata, u32 romlen, std::unique_ptr<u8[]>&& sramdata, u32 sramlen)
|
|
{
|
|
if (romdata == nullptr)
|
|
{
|
|
Log(LogLevel::Error, "GBACart: romdata is null\n");
|
|
return nullptr;
|
|
}
|
|
|
|
if (romlen == 0)
|
|
{
|
|
Log(LogLevel::Error, "GBACart: romlen is zero\n");
|
|
return nullptr;
|
|
}
|
|
|
|
auto [cartrom, cartromsize] = PadToPowerOf2(std::move(romdata), romlen);
|
|
|
|
char gamecode[5] = { '\0' };
|
|
memcpy(&gamecode, cartrom.get() + 0xAC, 4);
|
|
|
|
bool solarsensor = false;
|
|
for (const char* i : SOLAR_SENSOR_GAMECODES)
|
|
{
|
|
if (strcmp(gamecode, i) == 0)
|
|
solarsensor = true;
|
|
}
|
|
|
|
if (solarsensor)
|
|
{
|
|
Log(LogLevel::Info, "GBA solar sensor support detected!\n");
|
|
}
|
|
|
|
std::unique_ptr<CartCommon> cart;
|
|
if (solarsensor)
|
|
cart = std::make_unique<CartGameSolarSensor>(std::move(cartrom), cartromsize, std::move(sramdata), sramlen);
|
|
else
|
|
cart = std::make_unique<CartGame>(std::move(cartrom), cartromsize, std::move(sramdata), sramlen);
|
|
|
|
cart->Reset();
|
|
|
|
// save
|
|
//printf("GBA save file: %s\n", sram);
|
|
|
|
// TODO: have a list of sorts like in NDSCart? to determine the savemem type
|
|
//if (Cart) Cart->LoadSave(sram, 0);
|
|
|
|
return cart;
|
|
}
|
|
|
|
void GBACartSlot::SetCart(std::unique_ptr<CartCommon>&& cart) noexcept
|
|
{
|
|
Cart = std::move(cart);
|
|
|
|
if (!Cart)
|
|
{
|
|
Log(LogLevel::Info, "Ejected GBA cart");
|
|
return;
|
|
}
|
|
|
|
const u8* cartrom = Cart->GetROM();
|
|
|
|
if (cartrom)
|
|
{
|
|
char gamecode[5] = { '\0' };
|
|
memcpy(&gamecode, Cart->GetROM() + 0xAC, 4);
|
|
Log(LogLevel::Info, "Inserted GBA cart with game code: %s\n", gamecode);
|
|
}
|
|
else
|
|
{
|
|
Log(LogLevel::Info, "Inserted GBA cart with no game code (it's probably an accessory)\n");
|
|
}
|
|
}
|
|
|
|
void GBACartSlot::SetSaveMemory(const u8* savedata, u32 savelen) noexcept
|
|
{
|
|
if (Cart)
|
|
{
|
|
Cart->SetSaveMemory(savedata, savelen);
|
|
}
|
|
}
|
|
|
|
void GBACartSlot::LoadAddon(int type) noexcept
|
|
{
|
|
switch (type)
|
|
{
|
|
case GBAAddon_RAMExpansion:
|
|
Cart = std::make_unique<CartRAMExpansion>();
|
|
break;
|
|
|
|
default:
|
|
Log(LogLevel::Warn, "GBACart: !! invalid addon type %d\n", type);
|
|
return;
|
|
}
|
|
}
|
|
|
|
std::unique_ptr<CartCommon> GBACartSlot::EjectCart() noexcept
|
|
{
|
|
return std::move(Cart);
|
|
// Cart will be nullptr after this function returns, due to the move
|
|
}
|
|
|
|
|
|
int GBACartSlot::SetInput(int num, bool pressed) noexcept
|
|
{
|
|
if (Cart) return Cart->SetInput(num, pressed);
|
|
|
|
return -1;
|
|
}
|
|
|
|
|
|
u16 GBACartSlot::ROMRead(u32 addr) const noexcept
|
|
{
|
|
if (Cart) return Cart->ROMRead(addr);
|
|
|
|
return ((addr >> 1) & 0xFFFF) | OpenBusDecay;
|
|
}
|
|
|
|
void GBACartSlot::ROMWrite(u32 addr, u16 val) noexcept
|
|
{
|
|
if (Cart) Cart->ROMWrite(addr, val);
|
|
}
|
|
|
|
u8 GBACartSlot::SRAMRead(u32 addr) noexcept
|
|
{
|
|
if (Cart) return Cart->SRAMRead(addr);
|
|
|
|
return 0xFF;
|
|
}
|
|
|
|
void GBACartSlot::SRAMWrite(u32 addr, u8 val) noexcept
|
|
{
|
|
if (Cart) Cart->SRAMWrite(addr, val);
|
|
}
|
|
|
|
}
|
|
|
|
} |