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/* -*- mode: C++; tab-width: 4 -*- */
/* ===================================================================== *\
Copyright (c) 2000-2001 Palm, Inc. or its subsidiaries.
All rights reserved.
This file is part of the Palm OS Emulator.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
\* ===================================================================== */
#include "EmCommon.h"
#include "EmTRGCFIO.h"
//-------------------------------------------------------------------------
// This file implements card I/O emulation by performing read and write
// operations on a file on the PC. Note that this file doesn't know
// anything about ATA registers ... it's more of a state machine for
// a continuous series of reads and writes
//
// These functions will create a disk file on the PC ... if one doesn't
// exist, it will create it in a formatted state.
//
// The code should work even if the disk file is replaced by an image
// from a real card ... there is no additional info stored with the card
// however, the tuple info won't agree with the card
//---------------------------------------------------------------------------
// ---------------------------------------------------------------------------
// ¥ EmCFIO::EmCFIO
// ---------------------------------------------------------------------------
EmCFIO::EmCFIO (void)
{
}
// ---------------------------------------------------------------------------
// ¥ EmCFIO::~EmCFIO
// ---------------------------------------------------------------------------
EmCFIO::~EmCFIO (void)
{
}
// ---------------------------------------------------------------------------
// ¥ EmCFIO::~EmCFIO
// ---------------------------------------------------------------------------
void EmCFIO::Reset(void)
{
State.NumSectorsRequested = 0;
State.NumSectorsCompleted = 0;
State.SectorIndex = 0;
State.Status = DIO_SUCCESS;
State.Error = 0;
}
// ---------------------------------------------------------------------------
// ¥ EmCFIO::Initialize
// ---------------------------------------------------------------------------
void EmCFIO::Initialize (EmDiskTypeID ID)
{
DiskTypeID = ID;
DiskIO.Initialize(ID, CF_DRIVE);
Reset();
}
// ---------------------------------------------------------------------------
// ¥ EmCFIO::Dispose
// ---------------------------------------------------------------------------
void EmCFIO::Dispose (void)
{
DiskIO.Dispose();
}
// ---------------------------------------------------------------------------
// ¥ EmCFIO::ReadSector
// ---------------------------------------------------------------------------
DiskIOStatus EmCFIO::ReadSector(void)
{
if ((DiskIO.ReadSector(State.Lba, (char *)State.Sector.Bytes)) != 0)
return DIO_ERROR;
return DIO_SUCCESS;
}
// ---------------------------------------------------------------------------
// ¥ EmCFIO::WriteSector
// ---------------------------------------------------------------------------
DiskIOStatus EmCFIO::WriteSector(void)
{
if ((DiskIO.WriteSector(State.Lba, (char *)State.Sector.Bytes)) != 0)
return DIO_ERROR;
return DIO_SUCCESS;
}
// ---------------------------------------------------------------------------
// ¥ EmCFIO::ReadNextDataByte
// ---------------------------------------------------------------------------
void EmCFIO::ReadNextDataByte(uint8 * val)
{
// this first statement will likely not be called except when someone's
// dumping memory at our address range
if (State.NumSectorsCompleted >= State.NumSectorsRequested)
*val = 0;
else
{
*val = State.Sector.Bytes[State.SectorIndex++];
if (State.SectorIndex >= SECTOR_SIZE)
{
if (++State.NumSectorsCompleted < State.NumSectorsRequested)
{
State.Lba++;
State.SectorIndex = 0;
State.Status = ReadSector();
}
}
}
if (State.Status != DIO_SUCCESS)
State.Error = IDE_ERR_01_GENERAL_ERROR;
}
// ---------------------------------------------------------------------------
// ¥ EmCFIO::WriteNextDataByte
// ---------------------------------------------------------------------------
void EmCFIO::WriteNextDataByte(uint8 val)
{
State.Status = DIO_SUCCESS;
if (State.NumSectorsCompleted < State.NumSectorsRequested)
{
State.Sector.Bytes[State.SectorIndex++] = val;
if (State.SectorIndex >= SECTOR_SIZE)
{
if (WriteSector() == DIO_ERROR)
State.Status = DIO_ERROR;
else if (++State.NumSectorsCompleted < State.NumSectorsRequested)
{
State.Status = DIO_SUCCESS;
State.Lba++;
State.SectorIndex = 0;
}
}
}
if (State.Status != DIO_SUCCESS)
State.Error = IDE_ERR_01_GENERAL_ERROR;
}
// ---------------------------------------------------------------------------
// ¥ EmCFIO::GetSectorCount
// ---------------------------------------------------------------------------
uint32 EmCFIO::GetSectorCount(void)
{
return State.NumSectorsCompleted;
}
// ---------------------------------------------------------------------------
// ¥ EmCFIO::StartDriveID
// ---------------------------------------------------------------------------
void EmCFIO::StartDriveID(void)
{
CurrDisk.GetDriveID(DiskTypeID,
&State.Sector);
State.NumSectorsRequested = 1;
State.NumSectorsCompleted = 0;
State.SectorIndex = 0;
State.Status = DIO_SUCCESS;
State.Error = 0;
}
// ---------------------------------------------------------------------------
// ¥ EmCFIO::StartRead
// ---------------------------------------------------------------------------
void EmCFIO::StartRead(DiskIOParams * params)
{
State.Lba = params->Lba;
State.NumSectorsRequested = params->SectorCnt;
State.NumSectorsCompleted = 0;
State.SectorIndex = 0;
State.Error = 0;
State.Status = ReadSector();
}
// ---------------------------------------------------------------------------
// ¥ EmCFIO::StartWrite
// ---------------------------------------------------------------------------
void EmCFIO::StartWrite(DiskIOParams * params)
{
State.Lba = params->Lba;
State.NumSectorsRequested = params->SectorCnt;
State.NumSectorsCompleted = 0;
State.SectorIndex = 0;
State.Status = DIO_SUCCESS;
State.Error = 0;
}
// ---------------------------------------------------------------------------
// ¥ EmCFIO::GetStatus
// ---------------------------------------------------------------------------
void EmCFIO::GetStatus(DiskIOStatus * status,
DiskDataStatus * dataStatus)
{
*status = State.Status;
if (State.NumSectorsCompleted == State.NumSectorsRequested)
*dataStatus = DIO_DATA_COMPLETE;
else
*dataStatus = DIO_MORE_DATA;
}
// ---------------------------------------------------------------------------
// ¥ EmCFIO::GetError
// ---------------------------------------------------------------------------
DiskIOError EmCFIO::GetError(void)
{
if (State.Status == DIO_SUCCESS)
return(0);
else
// at this point, all errors are pretty much the same ... we can't
// create our emulation file ... we probably will need to include
// some more refined error codes at some point
return(State.Error);
}
void EmCFIO::SetError(DiskIOError error)
{
State.Status = DIO_ERROR;
State.Error = error;
}
void EmCFIO::ClearError(void)
{
State.Status = DIO_SUCCESS;
State.Error = 0;
}
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