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dolphin/Source/Core/Core/HW/DVDInterface.cpp
degasus 22e1aa5bb4 mark all local functions as static
2014-07-11 16:07:23 +02:00

1079 lines
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// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include <cinttypes>
#include "AudioCommon/AudioCommon.h"
#include "Common/ChunkFile.h"
#include "Common/Common.h"
#include "Common/Thread.h"
#include "Core/ConfigManager.h"
#include "Core/CoreTiming.h"
#include "Core/Movie.h"
#include "Core/VolumeHandler.h"
#include "Core/HW/AudioInterface.h"
#include "Core/HW/DVDInterface.h"
#include "Core/HW/Memmap.h"
#include "Core/HW/MMIO.h"
#include "Core/HW/ProcessorInterface.h"
#include "Core/HW/StreamADPCM.h"
#include "Core/HW/SystemTimers.h"
#include "Core/PowerPC/PowerPC.h"
// A GameCube disc can be read at somewhere between
// 2 and 3MB/sec, depending on the location on disk. Wii disks
// not yet tested.
static const u32 DISC_TRANSFER_RATE_GC = 3 * 1024 * 1024;
// Rate the drive can transfer data to main memory, given the data
// is already buffered.
static const u32 BUFFER_TRANSFER_RATE_GC = 16 * 1024 * 1024;
// Disc access time measured in milliseconds
static const u32 DISC_ACCESS_TIME_MS = 50;
namespace DVDInterface
{
// internal hardware addresses
enum
{
DI_STATUS_REGISTER = 0x00,
DI_COVER_REGISTER = 0x04,
DI_COMMAND_0 = 0x08,
DI_COMMAND_1 = 0x0C,
DI_COMMAND_2 = 0x10,
DI_DMA_ADDRESS_REGISTER = 0x14,
DI_DMA_LENGTH_REGISTER = 0x18,
DI_DMA_CONTROL_REGISTER = 0x1C,
DI_IMMEDIATE_DATA_BUFFER = 0x20,
DI_CONFIG_REGISTER = 0x24
};
// DVD IntteruptTypes
enum DI_InterruptType
{
INT_DEINT = 0,
INT_TCINT = 1,
INT_BRKINT = 2,
INT_CVRINT = 3,
};
// debug commands which may be ORd
enum
{
STOP_DRIVE = 0,
START_DRIVE = 0x100,
ACCEPT_COPY = 0x4000,
DISC_CHECK = 0x8000,
};
// DI Status Register
union UDISR
{
u32 Hex;
struct
{
u32 BREAK : 1; // Stop the Device + Interrupt
u32 DEINITMASK : 1; // Access Device Error Int Mask
u32 DEINT : 1; // Access Device Error Int
u32 TCINTMASK : 1; // Transfer Complete Int Mask
u32 TCINT : 1; // Transfer Complete Int
u32 BRKINTMASK : 1;
u32 BRKINT : 1; // w 1: clear brkint
u32 : 25;
};
UDISR() {Hex = 0;}
UDISR(u32 _hex) {Hex = _hex;}
};
// DI Cover Register
union UDICVR
{
u32 Hex;
struct
{
u32 CVR : 1; // 0: Cover closed 1: Cover open
u32 CVRINTMASK : 1; // 1: Interrupt enabled
u32 CVRINT : 1; // r 1: Interrupt requested w 1: Interrupt clear
u32 : 29;
};
UDICVR() {Hex = 0;}
UDICVR(u32 _hex) {Hex = _hex;}
};
union UDICMDBUF
{
u32 Hex;
struct
{
u8 CMDBYTE3;
u8 CMDBYTE2;
u8 CMDBYTE1;
u8 CMDBYTE0;
};
};
// DI DMA Address Register
union UDIMAR
{
u32 Hex;
struct
{
u32 Zerobits : 5; // Must be zero (32byte aligned)
u32 : 27;
};
struct
{
u32 Address : 26;
u32 : 6;
};
};
// DI DMA Address Length Register
union UDILENGTH
{
u32 Hex;
struct
{
u32 Zerobits : 5; // Must be zero (32byte aligned)
u32 : 27;
};
struct
{
u32 Length : 26;
u32 : 6;
};
};
// DI DMA Control Register
union UDICR
{
u32 Hex;
struct
{
u32 TSTART : 1; // w:1 start r:0 ready
u32 DMA : 1; // 1: DMA Mode 0: Immediate Mode (can only do Access Register Command)
u32 RW : 1; // 0: Read Command (DVD to Memory) 1: Write Command (Memory to DVD)
u32 : 29;
};
};
union UDIIMMBUF
{
u32 Hex;
struct
{
u8 REGVAL3;
u8 REGVAL2;
u8 REGVAL1;
u8 REGVAL0;
};
};
// DI Config Register
union UDICFG
{
u32 Hex;
struct
{
u32 CONFIG : 8;
u32 : 24;
};
UDICFG() {Hex = 0;}
UDICFG(u32 _hex) {Hex = _hex;}
};
// STATE_TO_SAVE
// hardware registers
static UDISR m_DISR;
static UDICVR m_DICVR;
static UDICMDBUF m_DICMDBUF[3];
static UDIMAR m_DIMAR;
static UDILENGTH m_DILENGTH;
static UDICR m_DICR;
static UDIIMMBUF m_DIIMMBUF;
static UDICFG m_DICFG;
static u32 LoopStart;
static u32 AudioPos;
static u32 CurrentStart;
static u32 LoopLength;
static u32 CurrentLength;
u32 g_ErrorCode = 0;
bool g_bDiscInside = false;
bool g_bStream = false;
int tc = 0;
int dtk = 0;
static u64 g_last_read_offset;
static u64 g_last_read_time;
// GC-AM only
static unsigned char media_buffer[0x40];
static int ejectDisc;
static int insertDisc;
void EjectDiscCallback(u64 userdata, int cyclesLate);
void InsertDiscCallback(u64 userdata, int cyclesLate);
void UpdateInterrupts();
void GenerateDIInterrupt(DI_InterruptType _DVDInterrupt);
void ExecuteCommand();
void FinishExecuteRead();
void DoState(PointerWrap &p)
{
p.DoPOD(m_DISR);
p.DoPOD(m_DICVR);
p.DoArray(m_DICMDBUF, 3);
p.Do(m_DIMAR);
p.Do(m_DILENGTH);
p.Do(m_DICR);
p.Do(m_DIIMMBUF);
p.DoPOD(m_DICFG);
p.Do(LoopStart);
p.Do(AudioPos);
p.Do(LoopLength);
p.Do(g_ErrorCode);
p.Do(g_bDiscInside);
p.Do(g_bStream);
p.Do(CurrentStart);
p.Do(CurrentLength);
p.Do(g_last_read_offset);
p.Do(g_last_read_time);
}
static void TransferComplete(u64 userdata, int cyclesLate)
{
if (m_DICR.TSTART)
FinishExecuteRead();
}
static u32 ProcessDTKSamples(short *tempPCM, u32 num_samples)
{
u32 samples_processed = 0;
do
{
if (AudioPos >= CurrentStart + CurrentLength)
{
AudioPos = LoopStart;
CurrentStart = LoopStart;
CurrentLength = LoopLength;
NGCADPCM::InitFilter();
AudioInterface::GenerateAISInterrupt();
// If there isn't any audio to stream, stop streaming.
if (AudioPos >= CurrentStart + CurrentLength)
{
g_bStream = false;
}
break;
}
u8 tempADPCM[NGCADPCM::ONE_BLOCK_SIZE];
// TODO: What if we can't read from AudioPos?
VolumeHandler::ReadToPtr(tempADPCM, AudioPos, sizeof(tempADPCM));
AudioPos += sizeof(tempADPCM);
NGCADPCM::DecodeBlock(tempPCM + samples_processed * 2, tempADPCM);
samples_processed += NGCADPCM::SAMPLES_PER_BLOCK;
} while (samples_processed < num_samples);
for (unsigned i = 0; i < samples_processed * 2; ++i)
{
// TODO: Fix the mixer so it can accept non-byte-swapped samples.
tempPCM[i] = Common::swap16(tempPCM[i]);
}
return samples_processed;
}
static void DTKStreamingCallback(u64 userdata, int cyclesLate)
{
// Send audio to the mixer.
static const int NUM_SAMPLES = 48000 / 2000 * 7; // 3.5ms of 48kHz samples
short tempPCM[NUM_SAMPLES * 2];
unsigned samples_processed;
if (g_bStream)
{
samples_processed = ProcessDTKSamples(tempPCM, NUM_SAMPLES);
}
else
{
memset(tempPCM, 0, sizeof(tempPCM));
samples_processed = NUM_SAMPLES;
}
soundStream->GetMixer()->PushStreamingSamples(tempPCM, samples_processed);
int ticks_to_dtk = int(SystemTimers::GetTicksPerSecond() * u64(samples_processed) / 48000);
CoreTiming::ScheduleEvent(ticks_to_dtk - cyclesLate, dtk);
}
void Init()
{
m_DISR.Hex = 0;
m_DICVR.Hex = 0;
m_DICMDBUF[0].Hex = 0;
m_DICMDBUF[1].Hex = 0;
m_DICMDBUF[2].Hex = 0;
m_DIMAR.Hex = 0;
m_DILENGTH.Hex = 0;
m_DICR.Hex = 0;
m_DIIMMBUF.Hex = 0;
m_DICFG.Hex = 0;
m_DICFG.CONFIG = 1; // Disable bootrom descrambler
AudioPos = 0;
LoopStart = 0;
LoopLength = 0;
CurrentStart = 0;
CurrentLength = 0;
g_bStream = false;
ejectDisc = CoreTiming::RegisterEvent("EjectDisc", EjectDiscCallback);
insertDisc = CoreTiming::RegisterEvent("InsertDisc", InsertDiscCallback);
tc = CoreTiming::RegisterEvent("TransferComplete", TransferComplete);
dtk = CoreTiming::RegisterEvent("StreamingTimer", DTKStreamingCallback);
CoreTiming::ScheduleEvent(0, dtk);
}
void Shutdown()
{
}
void SetDiscInside(bool _DiscInside)
{
g_bDiscInside = _DiscInside;
}
bool IsDiscInside()
{
return g_bDiscInside;
}
// Take care of all logic of "swapping discs"
// We want this in the "backend", NOT the gui
// any !empty string will be deleted to ensure
// that the userdata string exists when called
void EjectDiscCallback(u64 userdata, int cyclesLate)
{
// Empty the drive
SetDiscInside(false);
SetLidOpen();
VolumeHandler::EjectVolume();
}
void InsertDiscCallback(u64 userdata, int cyclesLate)
{
std::string& SavedFileName = SConfig::GetInstance().m_LocalCoreStartupParameter.m_strFilename;
std::string *_FileName = (std::string *)userdata;
if (!VolumeHandler::SetVolumeName(*_FileName))
{
// Put back the old one
VolumeHandler::SetVolumeName(SavedFileName);
PanicAlertT("Invalid file");
}
SetLidOpen(false);
SetDiscInside(VolumeHandler::IsValid());
delete _FileName;
}
void ChangeDisc(const std::string& newFileName)
{
std::string* _FileName = new std::string(newFileName);
CoreTiming::ScheduleEvent_Threadsafe(0, ejectDisc);
CoreTiming::ScheduleEvent_Threadsafe(500000000, insertDisc, (u64)_FileName);
if (Movie::IsRecordingInput())
{
Movie::g_bDiscChange = true;
std::string fileName = newFileName;
auto sizeofpath = fileName.find_last_of("/\\") + 1;
if (fileName.substr(sizeofpath).length() > 40)
{
PanicAlert("Saving iso filename to .dtm failed; max file name length is 40 characters.");
}
Movie::g_discChange = fileName.substr(sizeofpath);
}
}
void SetLidOpen(bool _bOpen)
{
m_DICVR.CVR = _bOpen ? 1 : 0;
GenerateDIInterrupt(INT_CVRINT);
}
bool IsLidOpen()
{
return (m_DICVR.CVR == 1);
}
void ClearCoverInterrupt()
{
m_DICVR.CVRINT = 0;
}
bool DVDRead(u32 _iDVDOffset, u32 _iRamAddress, u32 _iLength)
{
return VolumeHandler::ReadToPtr(Memory::GetPointer(_iRamAddress), _iDVDOffset, _iLength);
}
void RegisterMMIO(MMIO::Mapping* mmio, u32 base)
{
mmio->Register(base | DI_STATUS_REGISTER,
MMIO::DirectRead<u32>(&m_DISR.Hex),
MMIO::ComplexWrite<u32>([](u32, u32 val) {
UDISR tmpStatusReg(val);
m_DISR.DEINITMASK = tmpStatusReg.DEINITMASK;
m_DISR.TCINTMASK = tmpStatusReg.TCINTMASK;
m_DISR.BRKINTMASK = tmpStatusReg.BRKINTMASK;
m_DISR.BREAK = tmpStatusReg.BREAK;
if (tmpStatusReg.DEINT)
m_DISR.DEINT = 0;
if (tmpStatusReg.TCINT)
m_DISR.TCINT = 0;
if (tmpStatusReg.BRKINT)
m_DISR.BRKINT = 0;
if (m_DISR.BREAK)
{
_dbg_assert_(DVDINTERFACE, 0);
}
UpdateInterrupts();
})
);
mmio->Register(base | DI_COVER_REGISTER,
MMIO::DirectRead<u32>(&m_DICVR.Hex),
MMIO::ComplexWrite<u32>([](u32, u32 val) {
UDICVR tmpCoverReg(val);
m_DICVR.CVRINTMASK = tmpCoverReg.CVRINTMASK;
if (tmpCoverReg.CVRINT)
m_DICVR.CVRINT = 0;
UpdateInterrupts();
})
);
// Command registers are very similar and we can register them with a
// simple loop.
for (int i = 0; i < 3; ++i)
mmio->Register(base | (DI_COMMAND_0 + 4 * i),
MMIO::DirectRead<u32>(&m_DICMDBUF[i].Hex),
MMIO::DirectWrite<u32>(&m_DICMDBUF[i].Hex)
);
// DMA related registers. Mostly direct accesses (+ masking for writes to
// handle things like address alignment) and complex write on the DMA
// control register that will trigger the DMA.
mmio->Register(base | DI_DMA_ADDRESS_REGISTER,
MMIO::DirectRead<u32>(&m_DIMAR.Hex),
MMIO::DirectWrite<u32>(&m_DIMAR.Hex, ~0xFC00001F)
);
mmio->Register(base | DI_DMA_LENGTH_REGISTER,
MMIO::DirectRead<u32>(&m_DILENGTH.Hex),
MMIO::DirectWrite<u32>(&m_DILENGTH.Hex, ~0x1F)
);
mmio->Register(base | DI_DMA_CONTROL_REGISTER,
MMIO::DirectRead<u32>(&m_DICR.Hex),
MMIO::ComplexWrite<u32>([](u32, u32 val) {
m_DICR.Hex = val & 7;
if (m_DICR.TSTART)
{
ExecuteCommand();
}
})
);
mmio->Register(base | DI_IMMEDIATE_DATA_BUFFER,
MMIO::DirectRead<u32>(&m_DIIMMBUF.Hex),
MMIO::DirectWrite<u32>(&m_DIIMMBUF.Hex)
);
// DI config register is read only.
mmio->Register(base | DI_CONFIG_REGISTER,
MMIO::DirectRead<u32>(&m_DICFG.Hex),
MMIO::InvalidWrite<u32>()
);
}
void UpdateInterrupts()
{
if ((m_DISR.DEINT & m_DISR.DEINITMASK) ||
(m_DISR.TCINT & m_DISR.TCINTMASK) ||
(m_DISR.BRKINT & m_DISR.BRKINTMASK) ||
(m_DICVR.CVRINT & m_DICVR.CVRINTMASK))
{
ProcessorInterface::SetInterrupt(ProcessorInterface::INT_CAUSE_DI, true);
}
else
{
ProcessorInterface::SetInterrupt(ProcessorInterface::INT_CAUSE_DI, false);
}
// Required for Summoner: A Goddess Reborn
CoreTiming::ForceExceptionCheck(50);
}
void GenerateDIInterrupt(DI_InterruptType _DVDInterrupt)
{
switch (_DVDInterrupt)
{
case INT_DEINT: m_DISR.DEINT = 1; break;
case INT_TCINT: m_DISR.TCINT = 1; break;
case INT_BRKINT: m_DISR.BRKINT = 1; break;
case INT_CVRINT: m_DICVR.CVRINT = 1; break;
}
UpdateInterrupts();
}
void ExecuteCommand()
{
// _dbg_assert_(DVDINTERFACE, _DICR.RW == 0); // only DVD to Memory
int GCAM = ((SConfig::GetInstance().m_SIDevice[0] == SIDEVICE_AM_BASEBOARD) &&
(SConfig::GetInstance().m_EXIDevice[2] == EXIDEVICE_AM_BASEBOARD))
? 1 : 0;
if (GCAM)
{
ERROR_LOG(DVDINTERFACE,
"DVD: %08x, %08x, %08x, DMA=addr:%08x,len:%08x,ctrl:%08x",
m_DICMDBUF[0].Hex, m_DICMDBUF[1].Hex, m_DICMDBUF[2].Hex,
m_DIMAR.Hex, m_DILENGTH.Hex, m_DICR.Hex);
// decrypt command. But we have a zero key, that simplifies things a lot.
// If you get crazy dvd command errors, make sure 0x80000000 - 0x8000000c is zero'd
m_DICMDBUF[0].Hex <<= 24;
}
switch (m_DICMDBUF[0].CMDBYTE0)
{
case DVDLowInquiry:
if (GCAM)
{
// 0x29484100...
// was 21 i'm not entirely sure about this, but it works well.
m_DIIMMBUF.Hex = 0x21000000;
}
else
{
// small safety check, dunno if it's needed
if ((m_DICMDBUF[1].Hex == 0) && (m_DILENGTH.Length == 0x20))
{
u8* driveInfo = Memory::GetPointer(m_DIMAR.Address);
// gives the correct output in GCOS - 06 2001/08 (61)
// there may be other stuff missing ?
driveInfo[4] = 0x20;
driveInfo[5] = 0x01;
driveInfo[6] = 0x06;
driveInfo[7] = 0x08;
driveInfo[8] = 0x61;
// Just for fun
INFO_LOG(DVDINTERFACE, "Drive Info: %02x %02x%02x/%02x (%02x)",
driveInfo[6], driveInfo[4], driveInfo[5], driveInfo[7], driveInfo[8]);
}
}
break;
// "Set Extension"...not sure what it does
case 0x55:
INFO_LOG(DVDINTERFACE, "SetExtension");
break;
// DMA Read from Disc
case 0xA8:
if (g_bDiscInside)
{
switch (m_DICMDBUF[0].CMDBYTE3)
{
case 0x00: // Read Sector
{
u32 iDVDOffset = m_DICMDBUF[1].Hex << 2;
DEBUG_LOG(DVDINTERFACE, "Read: DVDOffset=%08x, DMABuffer=%08x, SrcLength=%08x, DMALength=%08x",
iDVDOffset, m_DIMAR.Address, m_DICMDBUF[2].Hex, m_DILENGTH.Length);
_dbg_assert_(DVDINTERFACE, m_DICMDBUF[2].Hex == m_DILENGTH.Length);
if (GCAM)
{
if (iDVDOffset & 0x80000000) // read request to hardware buffer
{
u32 len = m_DILENGTH.Length / 4;
switch (iDVDOffset)
{
case 0x80000000:
ERROR_LOG(DVDINTERFACE, "GC-AM: READ MEDIA BOARD STATUS (80000000)");
for (u32 i = 0; i < len; i++)
Memory::Write_U32(0, m_DIMAR.Address + i * 4);
break;
case 0x80000040:
ERROR_LOG(DVDINTERFACE, "GC-AM: READ MEDIA BOARD STATUS (2) (80000040)");
for (u32 i = 0; i < len; i++)
Memory::Write_U32(~0, m_DIMAR.Address + i * 4);
Memory::Write_U32(0x00000020, m_DIMAR.Address); // DIMM SIZE, LE
Memory::Write_U32(0x4743414D, m_DIMAR.Address + 4); // GCAM signature
break;
case 0x80000120:
ERROR_LOG(DVDINTERFACE, "GC-AM: READ FIRMWARE STATUS (80000120)");
for (u32 i = 0; i < len; i++)
Memory::Write_U32(0x01010101, m_DIMAR.Address + i * 4);
break;
case 0x80000140:
ERROR_LOG(DVDINTERFACE, "GC-AM: READ FIRMWARE STATUS (80000140)");
for (u32 i = 0; i < len; i++)
Memory::Write_U32(0x01010101, m_DIMAR.Address + i * 4);
break;
case 0x84000020:
ERROR_LOG(DVDINTERFACE, "GC-AM: READ MEDIA BOARD STATUS (1) (84000020)");
for (u32 i = 0; i < len; i++)
Memory::Write_U32(0x00000000, m_DIMAR.Address + i * 4);
break;
default:
ERROR_LOG(DVDINTERFACE, "GC-AM: UNKNOWN MEDIA BOARD LOCATION %x", iDVDOffset);
break;
}
break;
}
else if ((iDVDOffset == 0x1f900000) || (iDVDOffset == 0x1f900020))
{
ERROR_LOG(DVDINTERFACE, "GC-AM: READ MEDIA BOARD COMM AREA (1f900020)");
memcpy(Memory::GetPointer(m_DIMAR.Address), media_buffer + iDVDOffset - 0x1f900000, m_DILENGTH.Length);
for (u32 i = 0; i < m_DILENGTH.Length; i += 4)
ERROR_LOG(DVDINTERFACE, "GC-AM: %08x", Memory::Read_U32(m_DIMAR.Address + i));
break;
}
}
u64 ticksUntilTC = 0;
// The drive buffers 1MB (?) of data after every read request;
// if a read request is covered by this buffer (or if it's
// faster to wait for the data to be buffered), the drive
// doesn't seek; it returns buffered data. Data can be
// transferred from the buffer at up to 16MB/sec.
//
// If the drive has to seek, the time this takes varies a lot.
// A short seek is around 50ms; a long seek is around 150ms.
// However, the time isn't purely dependent on the distance; the
// pattern of previous seeks seems to matter in a way I'm
// not sure how to explain.
//
// Metroid Prime is a good example of a game that's sensitive to
// all of these details; if there isn't enough latency in the
// right places, doors open too quickly, and if there's too
// much latency in the wrong places, the video before the
// save-file select screen lags.
//
// For now, just use a very rough approximation: 50ms seek
// and 3MB/sec for reads outside 1MB, acceleated reads
// within 1MB. We can refine this if someone comes up
// with a more complete model for seek times.
u64 cur_time = CoreTiming::GetTicks();
// Number of ticks it takes to seek and read directly from the disk.
u64 disk_read_duration = m_DILENGTH.Length *
(SystemTimers::GetTicksPerSecond() / DISC_TRANSFER_RATE_GC) +
SystemTimers::GetTicksPerSecond() / 1000 * DISC_ACCESS_TIME_MS;
if (iDVDOffset + m_DILENGTH.Length - g_last_read_offset > 1024 * 1024)
{
// No buffer; just use the simple seek time + read time.
DEBUG_LOG(DVDINTERFACE, "Seeking %" PRId64 " bytes", s64(g_last_read_offset) - s64(iDVDOffset));
ticksUntilTC = disk_read_duration;
g_last_read_time = cur_time + ticksUntilTC;
}
else
{
// Possibly buffered; use the buffer if it saves time.
// It's not proven that the buffer actually behaves like this, but
// it appears to be a decent approximation.
// Time at which the buffer will contain the data we need.
u64 buffer_fill_time = (iDVDOffset + m_DILENGTH.Length - g_last_read_offset) *
(SystemTimers::GetTicksPerSecond() / DISC_TRANSFER_RATE_GC) +
g_last_read_time;
// Number of ticks it takes to transfer the data from the buffer to memory.
u64 buffer_read_duration = m_DILENGTH.Length *
(SystemTimers::GetTicksPerSecond() / BUFFER_TRANSFER_RATE_GC);
if (cur_time > buffer_fill_time)
{
DEBUG_LOG(DVDINTERFACE, "Fast buffer read at %" PRId64, s64(iDVDOffset));
ticksUntilTC = buffer_read_duration;
g_last_read_time = buffer_fill_time;
}
else if (cur_time + disk_read_duration > buffer_fill_time)
{
DEBUG_LOG(DVDINTERFACE, "Slow buffer read at %" PRId64, s64(iDVDOffset));
ticksUntilTC = std::max(buffer_fill_time - cur_time, buffer_read_duration);
g_last_read_time = buffer_fill_time;
}
else
{
DEBUG_LOG(DVDINTERFACE, "Short seek %" PRId64 " bytes", s64(g_last_read_offset) - s64(iDVDOffset));
ticksUntilTC = disk_read_duration;
g_last_read_time = cur_time + ticksUntilTC;
}
}
g_last_read_offset = (iDVDOffset + m_DILENGTH.Length - 2048) & ~2047;
if (SConfig::GetInstance().m_LocalCoreStartupParameter.bFastDiscSpeed)
{
// Make sure fast disc speed performs "instant" reads; in addition
// to being used to speed up games, fast disc speed is used as a
// workaround for crashes in certain games, including Star Wars
// Rogue Leader.
FinishExecuteRead();
return;
}
CoreTiming::ScheduleEvent((int)ticksUntilTC, tc);
// Early return; we'll finish executing the command in FinishExecuteRead.
return;
}
break;
case 0x40: // Read DiscID
_dbg_assert_(DVDINTERFACE, m_DICMDBUF[1].Hex == 0);
_dbg_assert_(DVDINTERFACE, m_DICMDBUF[2].Hex == m_DILENGTH.Length);
_dbg_assert_(DVDINTERFACE, m_DILENGTH.Length == 0x20);
if (!DVDRead(m_DICMDBUF[1].Hex, m_DIMAR.Address, m_DILENGTH.Length))
PanicAlertT("Can't read from DVD_Plugin - DVD-Interface: Fatal Error");
WARN_LOG(DVDINTERFACE, "Read DiscID %08x", Memory::Read_U32(m_DIMAR.Address));
break;
default:
_dbg_assert_msg_(DVDINTERFACE, 0, "Unknown Read Subcommand");
break;
}
}
else
{
// there is no disc to read
m_DICR.TSTART = 0;
m_DILENGTH.Length = 0;
g_ErrorCode = ERROR_NO_DISK | ERROR_COVER_H;
GenerateDIInterrupt(INT_DEINT);
return;
}
break;
// GC-AM
case 0xAA:
if (GCAM)
{
ERROR_LOG(DVDINTERFACE, "GC-AM: 0xAA, DMABuffer=%08x, DMALength=%08x", m_DIMAR.Address, m_DILENGTH.Length);
u32 iDVDOffset = m_DICMDBUF[1].Hex << 2;
unsigned int len = m_DILENGTH.Length;
int offset = iDVDOffset - 0x1F900000;
/*
if (iDVDOffset == 0x84800000)
{
ERROR_LOG(DVDINTERFACE, "Firmware upload");
}
else*/
if ((offset < 0) || ((offset + len) > 0x40) || len > 0x40)
{
u32 addr = m_DIMAR.Address;
if (iDVDOffset == 0x84800000)
{
ERROR_LOG(DVDINTERFACE, "FIRMWARE UPLOAD");
}
else
{
ERROR_LOG(DVDINTERFACE, "ILLEGAL MEDIA WRITE");
}
while (len >= 4)
{
ERROR_LOG(DVDINTERFACE, "GC-AM Media Board WRITE (0xAA): %08x: %08x", iDVDOffset, Memory::Read_U32(addr));
addr += 4;
len -= 4;
iDVDOffset += 4;
}
}
else
{
u32 addr = m_DIMAR.Address;
memcpy(media_buffer + offset, Memory::GetPointer(addr), len);
while (len >= 4)
{
ERROR_LOG(DVDINTERFACE, "GC-AM Media Board WRITE (0xAA): %08x: %08x", iDVDOffset, Memory::Read_U32(addr));
addr += 4;
len -= 4;
iDVDOffset += 4;
}
}
}
break;
// Seek (immediate)
case DVDLowSeek:
if (!GCAM)
{
// We don't care :)
DEBUG_LOG(DVDINTERFACE, "Seek: offset=%08x (ignoring)", m_DICMDBUF[1].Hex << 2);
}
else
{
memset(media_buffer, 0, 0x20);
media_buffer[0] = media_buffer[0x20]; // ID
media_buffer[2] = media_buffer[0x22];
media_buffer[3] = media_buffer[0x23] | 0x80;
int cmd = (media_buffer[0x23]<<8)|media_buffer[0x22];
ERROR_LOG(DVDINTERFACE, "GC-AM: execute buffer, cmd=%04x", cmd);
switch (cmd)
{
case 0x00:
media_buffer[4] = 1;
break;
case 0x1:
media_buffer[7] = 0x20; // DIMM Size
break;
case 0x100:
{
// urgh
static int percentage = 0;
static int status = 0;
percentage++;
if (percentage > 100)
{
status++;
percentage = 0;
}
media_buffer[4] = status;
/* status:
0 - "Initializing media board. Please wait.."
1 - "Checking network. Please wait..."
2 - "Found a system disc. Insert a game disc"
3 - "Testing a game program. %d%%"
4 - "Loading a game program. %d%%"
5 - go
6 - error xx
*/
media_buffer[8] = percentage;
media_buffer[4] = 0x05;
media_buffer[8] = 0x64;
break;
}
case 0x101:
media_buffer[4] = 3; // version
media_buffer[5] = 3;
media_buffer[6] = 1; // xxx
media_buffer[8] = 1;
media_buffer[16] = 0xFF;
media_buffer[17] = 0xFF;
media_buffer[18] = 0xFF;
media_buffer[19] = 0xFF;
break;
case 0x102: // get error code
media_buffer[4] = 1; // 0: download incomplete (31), 1: corrupted, other error 1
media_buffer[5] = 0;
break;
case 0x103:
memcpy(media_buffer + 4, "A89E27A50364511", 15); // serial
break;
#if 0
case 0x301: // unknown
memcpy(media_buffer + 4, media_buffer + 0x24, 0x1c);
break;
case 0x302:
break;
#endif
default:
ERROR_LOG(DVDINTERFACE, "GC-AM: execute buffer (unknown)");
break;
}
memset(media_buffer + 0x20, 0, 0x20);
m_DIIMMBUF.Hex = 0x66556677; // just a random value that works.
}
break;
case DVDLowOffset:
DEBUG_LOG(DVDINTERFACE, "DVDLowOffset: ignoring...");
break;
// Request Error Code
case DVDLowRequestError:
ERROR_LOG(DVDINTERFACE, "Requesting error... (0x%08x)", g_ErrorCode);
m_DIIMMBUF.Hex = g_ErrorCode;
break;
// Audio Stream (Immediate)
// m_DICMDBUF[0].CMDBYTE1 = Subcommand
// m_DICMDBUF[1].Hex << 2 = Offset on disc
// m_DICMDBUF[2].Hex = Length of the stream
case 0xE1:
{
u32 pos = m_DICMDBUF[1].Hex << 2;
u32 length = m_DICMDBUF[2].Hex;
// Start playing
if (!g_bStream && m_DICMDBUF[0].CMDBYTE1 == 0 && pos != 0 && length != 0)
{
AudioPos = pos;
CurrentStart = pos;
CurrentLength = length;
NGCADPCM::InitFilter();
}
LoopStart = pos;
LoopLength = length;
g_bStream = (m_DICMDBUF[0].CMDBYTE1 == 0); // This command can start/stop the stream
// Stop stream
if (m_DICMDBUF[0].CMDBYTE1 == 1)
{
AudioPos = 0;
LoopStart = 0;
LoopLength = 0;
CurrentStart = 0;
CurrentLength = 0;
}
WARN_LOG(DVDINTERFACE, "(Audio) Stream subcmd = %08x offset = %08x length=%08x",
m_DICMDBUF[0].Hex, m_DICMDBUF[1].Hex << 2, m_DICMDBUF[2].Hex);
}
break;
// Request Audio Status (Immediate)
case 0xE2:
{
switch (m_DICMDBUF[0].CMDBYTE1)
{
case 0x00: // Returns streaming status
m_DIIMMBUF.Hex = (AudioPos == 0) ? 0 : 1;
break;
case 0x01: // Returns the current offset
if (g_bStream)
m_DIIMMBUF.Hex = (AudioPos - CurrentStart) >> 2;
else
m_DIIMMBUF.Hex = 0;
break;
case 0x02: // Returns the start offset
if (g_bStream)
m_DIIMMBUF.Hex = CurrentStart >> 2;
else
m_DIIMMBUF.Hex = 0;
break;
case 0x03: // Returns the total length
if (g_bStream)
m_DIIMMBUF.Hex = CurrentLength;
else
m_DIIMMBUF.Hex = 0;
break;
default:
WARN_LOG(DVDINTERFACE, "(Audio): Subcommand: %02x Request Audio status %s", m_DICMDBUF[0].CMDBYTE1, g_bStream? "on":"off");
break;
}
}
break;
case DVDLowStopMotor:
DEBUG_LOG(DVDINTERFACE, "Stop motor");
break;
// DVD Audio Enable/Disable (Immediate)
case DVDLowAudioBufferConfig:
if (m_DICMDBUF[0].CMDBYTE1 == 1)
{
// TODO: What is this actually supposed to do?
g_bStream = true;
WARN_LOG(DVDINTERFACE, "(Audio): Audio enabled");
}
else
{
// TODO: What is this actually supposed to do?
g_bStream = false;
WARN_LOG(DVDINTERFACE, "(Audio): Audio disabled");
}
break;
// yet another command we prolly don't care about
case 0xEE:
DEBUG_LOG(DVDINTERFACE, "SetStatus - Unimplemented");
break;
// Debug commands; see yagcd. We don't really care
// NOTE: commands to stream data will send...a raw data stream
// This will appear as unknown commands, unless the check is re-instated to catch such data.
case 0xFE:
INFO_LOG(DVDINTERFACE, "Unsupported DVD Drive debug command 0x%08x", m_DICMDBUF[0].Hex);
break;
// Unlock Commands. 1: "MATSHITA" 2: "DVD-GAME"
// Just for fun
case 0xFF:
{
if (m_DICMDBUF[0].Hex == 0xFF014D41 &&
m_DICMDBUF[1].Hex == 0x54534849 &&
m_DICMDBUF[2].Hex == 0x54410200)
{
INFO_LOG(DVDINTERFACE, "Unlock test 1 passed");
}
else if (m_DICMDBUF[0].Hex == 0xFF004456 &&
m_DICMDBUF[1].Hex == 0x442D4741 &&
m_DICMDBUF[2].Hex == 0x4D450300)
{
INFO_LOG(DVDINTERFACE, "Unlock test 2 passed");
}
else
{
INFO_LOG(DVDINTERFACE, "Unlock test failed");
}
}
break;
default:
PanicAlertT("Unknown DVD command %08x - fatal error", m_DICMDBUF[0].Hex);
_dbg_assert_(DVDINTERFACE, 0);
break;
}
// transfer is done
m_DICR.TSTART = 0;
m_DILENGTH.Length = 0;
GenerateDIInterrupt(INT_TCINT);
g_ErrorCode = 0;
}
void FinishExecuteRead()
{
u32 iDVDOffset = m_DICMDBUF[1].Hex << 2;
if (!DVDRead(iDVDOffset, m_DIMAR.Address, m_DILENGTH.Length))
{
PanicAlertT("Can't read from DVD_Plugin - DVD-Interface: Fatal Error");
}
// transfer is done
m_DICR.TSTART = 0;
m_DILENGTH.Length = 0;
GenerateDIInterrupt(INT_TCINT);
g_ErrorCode = 0;
}
} // namespace
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