// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename       : MediaTek.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : MediaTek vendor commands.
//
// --[ Description ] ----------------------------------------------------------
//
//     Contains vendor commands for MMC drives with MediaTek chipsets.
//
// --[ License ] --------------------------------------------------------------
//
//     This library is free software; you can redistribute it and/or modify
//     it under the terms of the GNU Lesser General Public License as
//     published by the Free Software Foundation; either version 2.1 of the
//     License, or (at your option) any later version.
//
//     This library 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
//     Lesser General Public License for more details.
//
//     You should have received a copy of the GNU Lesser General Public
//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2026 Natalia Portillo
// ****************************************************************************/

using System;
using Aaru.Logging;

namespace Aaru.Devices;

public partial class Device
{
    /// <summary>Reads from the drive's DRAM.</summary>
    /// <returns><c>true</c> if the command failed and <paramref name="senseBuffer" /> contains the sense buffer.</returns>
    /// <param name="buffer">Buffer where the DRAM contents will be stored</param>
    /// <param name="senseBuffer">Sense buffer.</param>
    /// <param name="timeout">Timeout in seconds.</param>
    /// <param name="duration">Duration in milliseconds it took for the device to execute the command.</param>
    /// <param name="offset">Starting offset in DRAM memory.</param>
    /// <param name="length">How much data to retrieve from DRAM.</param>
    public bool MediaTekReadDram(out byte[] buffer,  out ReadOnlySpan<byte> senseBuffer, uint offset, uint length,
                                 uint       timeout, out double             duration)
    {
        senseBuffer = SenseBuffer;
        Span<byte> cdb = CdbBuffer[..10];
        cdb.Clear();
        buffer = new byte[length];

        cdb[0] = (byte)ScsiCommands.MediaTekVendorCommand;
        cdb[1] = 0x06;
        cdb[2] = (byte)((offset & 0xFF000000) >> 24);
        cdb[3] = (byte)((offset & 0xFF0000)   >> 16);
        cdb[4] = (byte)((offset & 0xFF00)     >> 8);
        cdb[5] = (byte)(offset & 0xFF);
        cdb[6] = (byte)((length & 0xFF000000) >> 24);
        cdb[7] = (byte)((length & 0xFF0000)   >> 16);
        cdb[8] = (byte)((length & 0xFF00)     >> 8);
        cdb[9] = (byte)(length & 0xFF);

        LastError = SendScsiCommand(cdb, ref buffer, timeout, ScsiDirection.In, out duration, out bool sense);

        Error = LastError != 0;

        AaruLogging.Debug(SCSI_MODULE_NAME, Localization.MediaTek_READ_DRAM_took_0_ms, duration);

        return sense;
    }
}