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Rebecca Wallander
2026-03-29 12:10:53 +02:00
parent 2414a8a780
commit 0dfef8ccb3
12 changed files with 555 additions and 260 deletions
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99
Aaru.Devices/Device/ScsiCommands/OmniDrive.cs
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@@ -33,14 +33,17 @@
// ****************************************************************************/
using System;
using Aaru.CommonTypes.Enums;
using Aaru.CommonTypes.Structs.Devices.SCSI;
using Aaru.Logging;
using Aaru.Decoders.DVD;
using NintendoSector = Aaru.Decoders.Nintendo.Sector;
namespace Aaru.Devices;
public partial class Device
{
readonly NintendoSector _nintendoSectorDecoder = new NintendoSector();
enum OmniDriveDiscType
{
CD = 0,
@@ -66,16 +69,16 @@ public partial class Device
static void FillOmniDriveReadDvdCdb(Span<byte> cdb, uint lba, uint transferLength, byte cdbByte1)
{
cdb.Clear();
cdb[0] = (byte)ScsiCommands.ReadOmniDrive;
cdb[1] = cdbByte1;
cdb[2] = (byte)((lba >> 24) & 0xFF);
cdb[3] = (byte)((lba >> 16) & 0xFF);
cdb[4] = (byte)((lba >> 8) & 0xFF);
cdb[5] = (byte)(lba & 0xFF);
cdb[6] = (byte)((transferLength >> 24) & 0xFF);
cdb[7] = (byte)((transferLength >> 16) & 0xFF);
cdb[8] = (byte)((transferLength >> 8) & 0xFF);
cdb[9] = (byte)(transferLength & 0xFF);
cdb[0] = (byte)ScsiCommands.ReadOmniDrive;
cdb[1] = cdbByte1;
cdb[2] = (byte)((lba >> 24) & 0xFF);
cdb[3] = (byte)((lba >> 16) & 0xFF);
cdb[4] = (byte)((lba >> 8) & 0xFF);
cdb[5] = (byte)(lba & 0xFF);
cdb[6] = (byte)((transferLength >> 24) & 0xFF);
cdb[7] = (byte)((transferLength >> 16) & 0xFF);
cdb[8] = (byte)((transferLength >> 8) & 0xFF);
cdb[9] = (byte)(transferLength & 0xFF);
cdb[10] = 0; // subchannels=NONE, c2=0
cdb[11] = 0; // control
}
@@ -89,20 +92,20 @@ public partial class Device
{
bool sense = ScsiInquiry(out byte[] buffer, out _, Timeout, out _);
if(sense || buffer == null) return false;
if (sense || buffer == null) return false;
Inquiry? inquiry = Inquiry.Decode(buffer);
if(!inquiry.HasValue || inquiry.Value.Reserved5 == null || inquiry.Value.Reserved5.Length < 11)
if (!inquiry.HasValue || inquiry.Value.Reserved5 == null || inquiry.Value.Reserved5.Length < 11)
return false;
byte[] reserved5 = inquiry.Value.Reserved5;
byte[] omnidrive = [0x4F, 0x6D, 0x6E, 0x69, 0x44, 0x72, 0x69, 0x76, 0x65]; // "OmniDrive"
if(reserved5.Length < omnidrive.Length) return false;
if (reserved5.Length < omnidrive.Length) return false;
for(int i = 0; i < omnidrive.Length; i++)
if(reserved5[i] != omnidrive[i])
for (int i = 0; i < omnidrive.Length; i++)
if (reserved5[i] != omnidrive[i])
return false;
return true;
@@ -131,8 +134,11 @@ public partial class Device
EncodeOmniDriveReadCdb1(OmniDriveDiscType.DVD, false, fua, descramble));
LastError = SendScsiCommand(cdb, ref buffer, timeout, ScsiDirection.In, out duration, out bool sense);
if(!Sector.CheckEdc(buffer, transferLength)) return true;
if (!Sector.CheckIed(buffer, transferLength)) return true;
if(descramble)
if (!Sector.CheckEdc(buffer, transferLength)) return true;
Error = LastError != 0;
@@ -142,13 +148,16 @@ public partial class Device
}
/// <summary>
/// Reads raw Nintendo GameCube/Wii DVD sectors (2064 bytes) on OmniDrive. Default matches redumper raw DVD
/// (<c>descramble</c> off); use software descramble via Aaru.Decoders.Nintendo.Sector when needed.
/// Reads Nintendo GameCube/Wii DVD sectors (2064 bytes) on OmniDrive. The drive returns DVD-layer data with
/// drive-side DVD descramble off; this method applies per-sector Nintendo XOR descramble and returns the result.
/// LBAs 0–15 use key 0; LBAs ≥ 16 use <paramref name="derivedDiscKey" /> (from LBA 0 CPR_MAI), or 0 if not yet
/// derived.
/// </summary>
/// <param name="descramble">Drive-side DVD descramble (redumper raw DVD uses <c>false</c>).</param>
/// <param name="derivedDiscKey">Disc key from LBA 0 (0–15); <c>null</c> until the host has read and derived it.</param>
/// <returns><c>true</c> if the command failed and <paramref name="senseBuffer" /> contains the sense buffer.</returns>
public bool OmniDriveReadNintendoDvd(out byte[] buffer, out ReadOnlySpan<byte> senseBuffer, uint lba, uint transferLength,
uint timeout, out double duration, bool descramble = false)
uint timeout, out double duration, bool fua = false, bool descramble = true,
byte? derivedDiscKey = null)
{
senseBuffer = SenseBuffer;
Span<byte> cdb = CdbBuffer[..12];
@@ -157,11 +166,55 @@ public partial class Device
FillOmniDriveReadDvdCdb(cdb,
lba,
transferLength,
EncodeOmniDriveReadCdb1(OmniDriveDiscType.DVD, false, false, descramble));
EncodeOmniDriveReadCdb1(OmniDriveDiscType.DVD, false, fua, false));
LastError = SendScsiCommand(cdb, ref buffer, timeout, ScsiDirection.In, out duration, out bool sense);
// Scrambled Nintendo sectors do not pass standard DVD EDC until software-descrambled.
if(!Sector.CheckIed(buffer, transferLength)) return true;
if(descramble) {
const int sectorBytes = 2064;
byte[] outBuf = new byte[sectorBytes * transferLength];
if(lba < 16 && lba + transferLength > 16) {
for(uint i = 0; i < transferLength; i++)
{
var slice = new byte[sectorBytes];
Array.Copy(buffer, i * sectorBytes, slice, 0, sectorBytes);
uint absLba = lba + i;
byte key = absLba < 16 ? (byte)0 : (derivedDiscKey ?? (byte)0);
ErrorNumber errno = _nintendoSectorDecoder.Scramble(slice, key, out byte[] descrambled);
if(errno != ErrorNumber.NoError || descrambled == null)
{
LastError = (int)errno;
Error = true;
return true;
}
Array.Copy(descrambled, 0, outBuf, i * sectorBytes, sectorBytes);
}
} else {
ErrorNumber errno = _nintendoSectorDecoder.Scramble(
buffer,
transferLength,
lba < 16 || lba > 0xffffff ? (byte)0 : (derivedDiscKey ?? (byte)0),
out outBuf);
if(errno != ErrorNumber.NoError || outBuf == null)
{
LastError = (int)errno;
Error = true;
return true;
}
}
buffer = outBuf;
}
Error = LastError != 0;
AaruLogging.Debug(SCSI_MODULE_NAME, "OmniDrive READ NINTENDO DVD took {0} ms", duration);