// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename       : SyQuest.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : SyQuest vendor commands.
//
// --[ Description ] ----------------------------------------------------------
//
//     Contains vendor commands for SyQuest SCSI devices.
//
// --[ 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 © 2011-2017 Natalia Portillo
// ****************************************************************************/

using DiscImageChef.Console;

namespace DiscImageChef.Devices
{
    public partial class Device
    {
        /// <summary>
        /// Sends the SyQuest READ (6) command
        /// </summary>
        /// <returns><c>true</c> if the command failed and <paramref name="senseBuffer"/> contains the sense buffer.</returns>
        /// <param name="buffer">Buffer where the SCSI READ response 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="lba">Starting block.</param>
        /// <param name="blockSize">Block size in bytes.</param>
        public bool SyQuestRead6(out byte[] buffer, out byte[] senseBuffer, uint lba, uint blockSize, uint timeout, out double duration)
        {
            return SyQuestRead6(out buffer, out senseBuffer, lba, blockSize, 1, false, false, timeout, out duration);
        }

        /// <summary>
        /// Sends the SyQuest READ LONG (6) command
        /// </summary>
        /// <returns><c>true</c> if the command failed and <paramref name="senseBuffer"/> contains the sense buffer.</returns>
        /// <param name="buffer">Buffer where the SCSI READ response 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="lba">Starting block.</param>
        /// <param name="blockSize">Block size in bytes.</param>
        public bool SyQuestReadLong6(out byte[] buffer, out byte[] senseBuffer, uint lba, uint blockSize, uint timeout, out double duration)
        {
            return SyQuestRead6(out buffer, out senseBuffer, lba, blockSize, 1, false, true, timeout, out duration);
        }

        /// <summary>
        /// Sends the SyQuest READ (6) command
        /// </summary>
        /// <returns><c>true</c> if the command failed and <paramref name="senseBuffer"/> contains the sense buffer.</returns>
        /// <param name="buffer">Buffer where the SCSI READ response 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="lba">Starting block.</param>
        /// <param name="inhibitDma">If set to <c>true</c>, block will not be transfer and will reside in the drive's buffer.</param>
        /// <param name="readLong">If set to <c>true</c> drive will return ECC bytes and disable error detection.</param>
        /// <param name="blockSize">Block size in bytes.</param>
        /// <param name="transferLength">How many blocks to read.</param>
        public bool SyQuestRead6(out byte[] buffer, out byte[] senseBuffer, uint lba, uint blockSize, byte transferLength, bool inhibitDma, bool readLong, uint timeout, out double duration)
        {
            senseBuffer = new byte[32];
            byte[] cdb = new byte[6];
            bool sense;

            cdb[0] = (byte)ScsiCommands.Read6;
            cdb[1] = (byte)((lba & 0x1F0000) >> 16);
            cdb[2] = (byte)((lba & 0xFF00) >> 8);
            cdb[3] = (byte)(lba & 0xFF);
            cdb[4] = transferLength;
            if(inhibitDma)
                cdb[5] += 0x80;
            if(readLong)
                cdb[5] += 0x40;

            if(!inhibitDma && !readLong)
            {
                if(transferLength == 0)
                    buffer = new byte[256 * blockSize];
                else
                    buffer = new byte[transferLength * blockSize];
            }
            else if(readLong)
            {
                buffer = new byte[blockSize];
                cdb[4] = 1;
            }
            else
                buffer = new byte[0];

            if(!inhibitDma)
                lastError = SendScsiCommand(cdb, ref buffer, out senseBuffer, timeout, ScsiDirection.In, out duration, out sense);
            else
                lastError = SendScsiCommand(cdb, ref buffer, out senseBuffer, timeout, ScsiDirection.None, out duration, out sense);

            error = lastError != 0;

            DicConsole.DebugWriteLine("SCSI Device", "SYQUEST READ (6) took {0} ms.", duration);

            return sense;
        }

        /// <summary>
        /// Requests the usage, seek and error counters, and resets them
        /// </summary>
        /// <param name="buffer">Buffer.</param>
        /// <param name="senseBuffer">Sense buffer.</param>
        /// <param name="timeout">Timeout.</param>
        /// <param name="duration">Duration.</param>
        public bool SyQuestReadUsageCounter(out byte[] buffer, out byte[] senseBuffer, uint timeout, out double duration)
        {
            return AdaptecReadUsageCounter(out buffer, out senseBuffer, false, timeout, out duration);
        }

        /// <summary>
        /// Sends the SyQuest READ LONG (10) command
        /// </summary>
        /// <returns><c>true</c> if the command failed and <paramref name="senseBuffer"/> contains the sense buffer.</returns>
        /// <param name="buffer">Buffer where the SCSI READ response 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="lba">Starting block.</param>
        /// <param name="blockSize">Block size in bytes.</param>
        public bool SyQuestReadLong10(out byte[] buffer, out byte[] senseBuffer, uint lba, uint blockSize, uint timeout, out double duration)
        {
            return SyQuestRead10(out buffer, out senseBuffer, lba, blockSize, 1, false, true, timeout, out duration);
        }

        /// <summary>
        /// Sends the SyQuest READ (10) command
        /// </summary>
        /// <returns><c>true</c> if the command failed and <paramref name="senseBuffer"/> contains the sense buffer.</returns>
        /// <param name="buffer">Buffer where the SCSI READ response 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="lba">Starting block.</param>
        /// <param name="inhibitDma">If set to <c>true</c>, block will not be transfer and will reside in the drive's buffer.</param>
        /// <param name="readLong">If set to <c>true</c> drive will return ECC bytes and disable error detection.</param>
        /// <param name="blockSize">Block size in bytes.</param>
        /// <param name="transferLength">How many blocks to read.</param>
        public bool SyQuestRead10(out byte[] buffer, out byte[] senseBuffer, uint lba, uint blockSize, ushort transferLength, bool inhibitDma, bool readLong, uint timeout, out double duration)
        {
            senseBuffer = new byte[32];
            byte[] cdb = new byte[10];
            bool sense;

            cdb[0] = (byte)ScsiCommands.Read10;
            cdb[2] = (byte)((lba & 0xFF000000) >> 24);
            cdb[3] = (byte)((lba & 0xFF0000) >> 16);
            cdb[4] = (byte)((lba & 0xFF00) >> 8);
            cdb[5] = (byte)(lba & 0xFF);
            cdb[7] = (byte)((transferLength & 0xFF00) >> 8);
            cdb[8] = (byte)(transferLength & 0xFF);
            if(inhibitDma)
                cdb[9] += 0x80;
            if(readLong)
                cdb[9] += 0x40;

            if(!inhibitDma && !readLong)
            {
                buffer = new byte[transferLength * blockSize];
            }
            else if(readLong)
            {
                buffer = new byte[blockSize];
                cdb[4] = 1;
            }
            else
                buffer = new byte[0];

            if(!inhibitDma)
                lastError = SendScsiCommand(cdb, ref buffer, out senseBuffer, timeout, ScsiDirection.In, out duration, out sense);
            else
                lastError = SendScsiCommand(cdb, ref buffer, out senseBuffer, timeout, ScsiDirection.None, out duration, out sense);
            error = lastError != 0;

            DicConsole.DebugWriteLine("SCSI Device", "SYQUEST READ (10) took {0} ms.", duration);

            return sense;
        }
    }
}

