mirror of
https://github.com/akuker/RASCSI.git
synced 2024-06-26 22:29:45 +00:00
96673a44b0
* Updated to match new versioning structure * fix version number Co-authored-by: Tony Kuker <akuker@gmail.com>
1867 lines
34 KiB
C++
1867 lines
34 KiB
C++
//---------------------------------------------------------------------------
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//
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// SCSI Target Emulator RaSCSI (*^..^*)
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// for Raspberry Pi
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//
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// Copyright (C) 2001-2006 ＰＩ．(ytanaka@ipc-tokai.or.jp)
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// Copyright (C) 2014-2020 GIMONS
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// Copyright (C) akuker
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//
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// Licensed under the BSD 3-Clause License.
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// See LICENSE file in the project root folder.
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//
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// [ SCSI device controller ]
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//
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//---------------------------------------------------------------------------
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#include "controllers/scsidev_ctrl.h"
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#include "gpiobus.h"
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#include "devices/scsi_host_bridge.h"
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#include "rascsi_version.h"
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//===========================================================================
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//
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// SCSI Device
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//
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//===========================================================================
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//---------------------------------------------------------------------------
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//
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// Constructor
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//
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//---------------------------------------------------------------------------
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#ifdef RASCSI
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SCSIDEV::SCSIDEV() : SASIDEV()
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#else
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SCSIDEV::SCSIDEV(Device *dev) : SASIDEV(dev)
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#endif
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{
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// Synchronous transfer work initialization
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scsi.syncenable = FALSE;
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scsi.syncperiod = 50;
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scsi.syncoffset = 0;
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scsi.atnmsg = FALSE;
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scsi.msc = 0;
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memset(scsi.msb, 0x00, sizeof(scsi.msb));
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}
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//---------------------------------------------------------------------------
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//
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// Device reset
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//
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//---------------------------------------------------------------------------
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void FASTCALL SCSIDEV::Reset()
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{
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ASSERT(this);
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// Work initialization
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scsi.atnmsg = FALSE;
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scsi.msc = 0;
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memset(scsi.msb, 0x00, sizeof(scsi.msb));
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// Base class
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SASIDEV::Reset();
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}
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//---------------------------------------------------------------------------
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//
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// Process
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//
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//---------------------------------------------------------------------------
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BUS::phase_t FASTCALL SCSIDEV::Process()
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{
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ASSERT(this);
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// Do nothing if not connected
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if (ctrl.id < 0 || ctrl.bus == NULL) {
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return ctrl.phase;
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}
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// Get bus information
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((GPIOBUS*)ctrl.bus)->Aquire();
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// Reset
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if (ctrl.bus->GetRST()) {
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#if defined(DISK_LOG)
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Log(Log::Normal, "RESET信号受信");
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#endif // DISK_LOG
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// Reset the controller
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Reset();
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// Reset the bus
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ctrl.bus->Reset();
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return ctrl.phase;
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}
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// Phase processing
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switch (ctrl.phase) {
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// Bus free phase
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case BUS::busfree:
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BusFree();
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break;
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// Selection phase
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case BUS::selection:
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Selection();
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break;
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// Data out (MCI=000)
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case BUS::dataout:
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DataOut();
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break;
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// Data in (MCI=001)
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case BUS::datain:
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DataIn();
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break;
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// Command (MCI=010)
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case BUS::command:
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Command();
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break;
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// Status (MCI=011)
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case BUS::status:
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Status();
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break;
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// Message out (MCI=110)
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case BUS::msgout:
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MsgOut();
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break;
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// Message in (MCI=111)
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case BUS::msgin:
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MsgIn();
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break;
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// Other
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default:
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ASSERT(FALSE);
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break;
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}
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return ctrl.phase;
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}
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//---------------------------------------------------------------------------
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//
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// Phaes
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//
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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//
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// Bus free phase
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//
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//---------------------------------------------------------------------------
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void FASTCALL SCSIDEV::BusFree()
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{
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ASSERT(this);
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// Phase change
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if (ctrl.phase != BUS::busfree) {
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#if defined(DISK_LOG)
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Log(Log::Normal, "Bus free phase");
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#endif // DISK_LOG
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// Phase setting
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ctrl.phase = BUS::busfree;
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// Signal line
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ctrl.bus->SetREQ(FALSE);
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ctrl.bus->SetMSG(FALSE);
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ctrl.bus->SetCD(FALSE);
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ctrl.bus->SetIO(FALSE);
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ctrl.bus->SetBSY(FALSE);
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// Initialize status and message
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ctrl.status = 0x00;
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ctrl.message = 0x00;
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// Initialize ATN message reception status
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scsi.atnmsg = FALSE;
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return;
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}
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// Move to selection phase
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if (ctrl.bus->GetSEL() && !ctrl.bus->GetBSY()) {
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Selection();
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}
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}
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//---------------------------------------------------------------------------
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//
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// Selection Phase
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//
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//---------------------------------------------------------------------------
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void FASTCALL SCSIDEV::Selection()
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{
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DWORD id;
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ASSERT(this);
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// Phase change
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if (ctrl.phase != BUS::selection) {
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// invalid if IDs do not match
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id = 1 << ctrl.id;
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if ((ctrl.bus->GetDAT() & id) == 0) {
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return;
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}
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// End if there is no valid unit
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if (!HasUnit()) {
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return;
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}
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#if defined(DISK_LOG)
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Log(Log::Normal,
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"Selection Phase ID=%d (with device)", ctrl.id);
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#endif // DISK_LOG
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// Phase setting
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ctrl.phase = BUS::selection;
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// Raise BSY and respond
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ctrl.bus->SetBSY(TRUE);
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return;
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}
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// Selection completed
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if (!ctrl.bus->GetSEL() && ctrl.bus->GetBSY()) {
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// Message out phase if ATN=1, otherwise command phase
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if (ctrl.bus->GetATN()) {
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MsgOut();
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} else {
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Command();
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}
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}
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}
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//---------------------------------------------------------------------------
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//
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// Execution Phase
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//
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//---------------------------------------------------------------------------
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void FASTCALL SCSIDEV::Execute()
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{
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ASSERT(this);
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#if defined(DISK_LOG)
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Log(Log::Normal, "Execution phase command $%02X", ctrl.cmd[0]);
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#endif // DISK_LOG
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// Phase Setting
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ctrl.phase = BUS::execute;
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// Initialization for data transfer
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ctrl.offset = 0;
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ctrl.blocks = 1;
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#ifdef RASCSI
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ctrl.execstart = SysTimer::GetTimerLow();
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#endif // RASCSI
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// Process by command
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switch (ctrl.cmd[0]) {
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// TEST UNIT READY
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case 0x00:
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CmdTestUnitReady();
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return;
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// REZERO
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case 0x01:
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CmdRezero();
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return;
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// REQUEST SENSE
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case 0x03:
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CmdRequestSense();
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return;
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// FORMAT UNIT
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case 0x04:
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CmdFormat();
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return;
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// REASSIGN BLOCKS
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case 0x07:
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CmdReassign();
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return;
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// READ(6)
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case 0x08:
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CmdRead6();
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return;
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// WRITE(6)
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case 0x0a:
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CmdWrite6();
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return;
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// SEEK(6)
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case 0x0b:
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CmdSeek6();
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return;
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// INQUIRY
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case 0x12:
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CmdInquiry();
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return;
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// MODE SELECT
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case 0x15:
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CmdModeSelect();
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return;
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// MDOE SENSE
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case 0x1a:
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CmdModeSense();
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return;
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// START STOP UNIT
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case 0x1b:
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CmdStartStop();
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return;
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// SEND DIAGNOSTIC
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case 0x1d:
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CmdSendDiag();
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return;
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// PREVENT/ALLOW MEDIUM REMOVAL
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case 0x1e:
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CmdRemoval();
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return;
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// READ CAPACITY
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case 0x25:
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CmdReadCapacity();
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return;
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// READ(10)
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case 0x28:
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CmdRead10();
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return;
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// WRITE(10)
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case 0x2a:
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CmdWrite10();
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return;
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// SEEK(10)
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case 0x2b:
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CmdSeek10();
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return;
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// WRITE and VERIFY
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case 0x2e:
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CmdWrite10();
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return;
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// VERIFY
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case 0x2f:
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CmdVerify();
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return;
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// SYNCHRONIZE CACHE
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case 0x35:
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CmdSynchronizeCache();
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return;
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// READ DEFECT DATA(10)
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case 0x37:
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CmdReadDefectData10();
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return;
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// READ TOC
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case 0x43:
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CmdReadToc();
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return;
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// PLAY AUDIO(10)
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case 0x45:
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CmdPlayAudio10();
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return;
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// PLAY AUDIO MSF
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case 0x47:
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CmdPlayAudioMSF();
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return;
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// PLAY AUDIO TRACK
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case 0x48:
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CmdPlayAudioTrack();
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return;
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// MODE SELECT(10)
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case 0x55:
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CmdModeSelect10();
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return;
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// MDOE SENSE(10)
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case 0x5a:
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CmdModeSense10();
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return;
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// SPECIFY (SASI only/Suppress warning when using SxSI)
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case 0xc2:
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CmdInvalid();
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return;
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}
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// No other support
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Log(Log::Normal, "Unsupported command received: $%02X", ctrl.cmd[0]);
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CmdInvalid();
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}
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//---------------------------------------------------------------------------
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//
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// Message out phase
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//
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//---------------------------------------------------------------------------
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void FASTCALL SCSIDEV::MsgOut()
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{
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ASSERT(this);
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// Phase change
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if (ctrl.phase != BUS::msgout) {
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#if defined(DISK_LOG)
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Log(Log::Normal, "Message Out Phase");
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#endif // DISK_LOG
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// Message out phase after selection
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// process the IDENTIFY message
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if (ctrl.phase == BUS::selection) {
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scsi.atnmsg = TRUE;
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scsi.msc = 0;
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memset(scsi.msb, 0x00, sizeof(scsi.msb));
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}
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// Phase Setting
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ctrl.phase = BUS::msgout;
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// Signal line operated by the target
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ctrl.bus->SetMSG(TRUE);
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ctrl.bus->SetCD(TRUE);
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ctrl.bus->SetIO(FALSE);
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// Data transfer is 1 byte x 1 block
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ctrl.offset = 0;
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ctrl.length = 1;
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ctrl.blocks = 1;
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#ifndef RASCSI
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// Request message
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ctrl.bus->SetREQ(TRUE);
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#endif // RASCSI
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return;
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}
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#ifdef RASCSI
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// Receive
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Receive();
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#else
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// Requesting
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if (ctrl.bus->GetREQ()) {
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// Sent by the initiator
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if (ctrl.bus->GetACK()) {
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Receive();
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}
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} else {
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// Request the initator to
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if (!ctrl.bus->GetACK()) {
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ReceiveNext();
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}
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}
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#endif // RASCSI
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}
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//---------------------------------------------------------------------------
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//
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// Common Error Handling
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//
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//---------------------------------------------------------------------------
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void FASTCALL SCSIDEV::Error()
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{
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ASSERT(this);
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// Get bus information
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((GPIOBUS*)ctrl.bus)->Aquire();
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// Reset check
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if (ctrl.bus->GetRST()) {
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// Reset the controller
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Reset();
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// Reset the bus
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ctrl.bus->Reset();
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return;
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}
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// Bus free for status phase and message in phase
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if (ctrl.phase == BUS::status || ctrl.phase == BUS::msgin) {
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BusFree();
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return;
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}
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#if defined(DISK_LOG)
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Log(Log::Normal, "Error (to status phase)");
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#endif // DISK_LOG
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// Set status and message(CHECK CONDITION)
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ctrl.status = 0x02;
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ctrl.message = 0x00;
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// status phase
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Status();
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}
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//---------------------------------------------------------------------------
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//
|
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// Command
|
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//
|
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//---------------------------------------------------------------------------
|
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|
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//---------------------------------------------------------------------------
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//
|
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// INQUIRY
|
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//
|
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//---------------------------------------------------------------------------
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void FASTCALL SCSIDEV::CmdInquiry()
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{
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Disk *disk;
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int lun;
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DWORD major;
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DWORD minor;
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ASSERT(this);
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|
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#if defined(DISK_LOG)
|
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Log(Log::Normal, "INQUIRY Command");
|
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#endif // DISK_LOG
|
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|
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// Find a valid unit
|
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disk = NULL;
|
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for (lun = 0; lun < UnitMax; lun++) {
|
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if (ctrl.unit[lun]) {
|
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disk = ctrl.unit[lun];
|
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break;
|
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}
|
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}
|
||
|
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// Processed on the disk side (it is originally processed by the controller)
|
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if (disk) {
|
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major = (DWORD)rascsi_major_version;
|
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minor = (DWORD)rascsi_minor_version;
|
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ctrl.length =
|
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ctrl.unit[lun]->Inquiry(ctrl.cmd, ctrl.buffer, major, minor);
|
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} else {
|
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ctrl.length = 0;
|
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}
|
||
|
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if (ctrl.length <= 0) {
|
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// failure (error)
|
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Error();
|
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return;
|
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}
|
||
|
||
// Add synchronous transfer support information
|
||
if (scsi.syncenable) {
|
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ctrl.buffer[7] |= (1 << 4);
|
||
}
|
||
|
||
// Data-in Phase
|
||
DataIn();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// MODE SELECT
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdModeSelect()
|
||
{
|
||
DWORD lun;
|
||
|
||
ASSERT(this);
|
||
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal, "MODE SELECT Command");
|
||
#endif // DISK_LOG
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
ctrl.length = ctrl.unit[lun]->SelectCheck(ctrl.cmd);
|
||
if (ctrl.length <= 0) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Data out phase
|
||
DataOut();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// MODE SENSE
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdModeSense()
|
||
{
|
||
DWORD lun;
|
||
|
||
ASSERT(this);
|
||
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal, "MODE SENSE Command ");
|
||
#endif // DISK_LOG
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
ctrl.length = ctrl.unit[lun]->ModeSense(ctrl.cmd, ctrl.buffer);
|
||
ASSERT(ctrl.length >= 0);
|
||
if (ctrl.length == 0) {
|
||
Log(Log::Warning,
|
||
"Not supported MODE SENSE page $%02X", ctrl.cmd[2]);
|
||
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Data-in Phase
|
||
DataIn();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// START STOP UNIT
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdStartStop()
|
||
{
|
||
DWORD lun;
|
||
BOOL status;
|
||
|
||
ASSERT(this);
|
||
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal, "START STOP UNIT Command ");
|
||
#endif // DISK_LOG
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
status = ctrl.unit[lun]->StartStop(ctrl.cmd);
|
||
if (!status) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// status phase
|
||
Status();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// SEND DIAGNOSTIC
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdSendDiag()
|
||
{
|
||
DWORD lun;
|
||
BOOL status;
|
||
|
||
ASSERT(this);
|
||
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal, "SEND DIAGNOSTIC Command ");
|
||
#endif // DISK_LOG
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
status = ctrl.unit[lun]->SendDiag(ctrl.cmd);
|
||
if (!status) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// status phase
|
||
Status();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// PREVENT/ALLOW MEDIUM REMOVAL
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdRemoval()
|
||
{
|
||
DWORD lun;
|
||
BOOL status;
|
||
|
||
ASSERT(this);
|
||
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal, "PREVENT/ALLOW MEDIUM REMOVAL Command ");
|
||
#endif // DISK_LOG
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
status = ctrl.unit[lun]->Removal(ctrl.cmd);
|
||
if (!status) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// status phase
|
||
Status();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// READ CAPACITY
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdReadCapacity()
|
||
{
|
||
DWORD lun;
|
||
int length;
|
||
|
||
ASSERT(this);
|
||
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal, "READ CAPACITY Command ");
|
||
#endif // DISK_LOG
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
length = ctrl.unit[lun]->ReadCapacity(ctrl.cmd, ctrl.buffer);
|
||
ASSERT(length >= 0);
|
||
if (length <= 0) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Length setting
|
||
ctrl.length = length;
|
||
|
||
// Data-in Phase
|
||
DataIn();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// READ(10)
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdRead10()
|
||
{
|
||
DWORD lun;
|
||
DWORD record;
|
||
|
||
ASSERT(this);
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Receive message if host bridge
|
||
if (ctrl.unit[lun]->GetID() == MAKEID('S', 'C', 'B', 'R')) {
|
||
CmdGetMessage10();
|
||
return;
|
||
}
|
||
|
||
// Get record number and block number
|
||
record = ctrl.cmd[2];
|
||
record <<= 8;
|
||
record |= ctrl.cmd[3];
|
||
record <<= 8;
|
||
record |= ctrl.cmd[4];
|
||
record <<= 8;
|
||
record |= ctrl.cmd[5];
|
||
ctrl.blocks = ctrl.cmd[7];
|
||
ctrl.blocks <<= 8;
|
||
ctrl.blocks |= ctrl.cmd[8];
|
||
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal, "READ(10) command record=%08X block=%d", record, ctrl.blocks);
|
||
#endif // DISK_LOG
|
||
|
||
// Do not process 0 blocks
|
||
if (ctrl.blocks == 0) {
|
||
Status();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
ctrl.length = ctrl.unit[lun]->Read(ctrl.buffer, record);
|
||
if (ctrl.length <= 0) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Set next block
|
||
ctrl.next = record + 1;
|
||
|
||
// Data-in Phase
|
||
DataIn();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// WRITE(10)
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdWrite10()
|
||
{
|
||
DWORD lun;
|
||
DWORD record;
|
||
|
||
ASSERT(this);
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Receive message with host bridge
|
||
if (ctrl.unit[lun]->GetID() == MAKEID('S', 'C', 'B', 'R')) {
|
||
CmdSendMessage10();
|
||
return;
|
||
}
|
||
|
||
// Get record number and block number
|
||
record = ctrl.cmd[2];
|
||
record <<= 8;
|
||
record |= ctrl.cmd[3];
|
||
record <<= 8;
|
||
record |= ctrl.cmd[4];
|
||
record <<= 8;
|
||
record |= ctrl.cmd[5];
|
||
ctrl.blocks = ctrl.cmd[7];
|
||
ctrl.blocks <<= 8;
|
||
ctrl.blocks |= ctrl.cmd[8];
|
||
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal,
|
||
"WRTIE(10) command record=%08X blocks=%d", record, ctrl.blocks);
|
||
#endif // DISK_LOG
|
||
|
||
// Do not process 0 blocks
|
||
if (ctrl.blocks == 0) {
|
||
Status();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
ctrl.length = ctrl.unit[lun]->WriteCheck(record);
|
||
if (ctrl.length <= 0) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Set next block
|
||
ctrl.next = record + 1;
|
||
|
||
// Data out phase
|
||
DataOut();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// SEEK(10)
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdSeek10()
|
||
{
|
||
DWORD lun;
|
||
BOOL status;
|
||
|
||
ASSERT(this);
|
||
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal, "SEEK(10) Command ");
|
||
#endif // DISK_LOG
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
status = ctrl.unit[lun]->Seek(ctrl.cmd);
|
||
if (!status) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// status phase
|
||
Status();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// VERIFY
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdVerify()
|
||
{
|
||
DWORD lun;
|
||
BOOL status;
|
||
DWORD record;
|
||
|
||
ASSERT(this);
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Get record number and block number
|
||
record = ctrl.cmd[2];
|
||
record <<= 8;
|
||
record |= ctrl.cmd[3];
|
||
record <<= 8;
|
||
record |= ctrl.cmd[4];
|
||
record <<= 8;
|
||
record |= ctrl.cmd[5];
|
||
ctrl.blocks = ctrl.cmd[7];
|
||
ctrl.blocks <<= 8;
|
||
ctrl.blocks |= ctrl.cmd[8];
|
||
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal,
|
||
"VERIFY command record=%08X blocks=%d", record, ctrl.blocks);
|
||
#endif // DISK_LOG
|
||
|
||
// Do not process 0 blocks
|
||
if (ctrl.blocks == 0) {
|
||
Status();
|
||
return;
|
||
}
|
||
|
||
// if BytChk=0
|
||
if ((ctrl.cmd[1] & 0x02) == 0) {
|
||
// Command processing on drive
|
||
status = ctrl.unit[lun]->Seek(ctrl.cmd);
|
||
if (!status) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// status phase
|
||
Status();
|
||
return;
|
||
}
|
||
|
||
// Test loading
|
||
ctrl.length = ctrl.unit[lun]->Read(ctrl.buffer, record);
|
||
if (ctrl.length <= 0) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Set next block
|
||
ctrl.next = record + 1;
|
||
|
||
// Data out phase
|
||
DataOut();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// SYNCHRONIZE CACHE
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdSynchronizeCache()
|
||
{
|
||
DWORD lun;
|
||
|
||
ASSERT(this);
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Make it do something (not implemented)...
|
||
|
||
// status phase
|
||
Status();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// READ DEFECT DATA(10)
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdReadDefectData10()
|
||
{
|
||
DWORD lun;
|
||
|
||
ASSERT(this);
|
||
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal, "READ DEFECT DATA(10) Command ");
|
||
#endif // DISK_LOG
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
ctrl.length = ctrl.unit[lun]->ReadDefectData10(ctrl.cmd, ctrl.buffer);
|
||
ASSERT(ctrl.length >= 0);
|
||
|
||
if (ctrl.length <= 4) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Data-in Phase
|
||
DataIn();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// READ TOC
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdReadToc()
|
||
{
|
||
DWORD lun;
|
||
|
||
ASSERT(this);
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
ctrl.length = ctrl.unit[lun]->ReadToc(ctrl.cmd, ctrl.buffer);
|
||
if (ctrl.length <= 0) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Data-in Phase
|
||
DataIn();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// PLAY AUDIO(10)
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdPlayAudio10()
|
||
{
|
||
DWORD lun;
|
||
BOOL status;
|
||
|
||
ASSERT(this);
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
status = ctrl.unit[lun]->PlayAudio(ctrl.cmd);
|
||
if (!status) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// status phase
|
||
Status();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// PLAY AUDIO MSF
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdPlayAudioMSF()
|
||
{
|
||
DWORD lun;
|
||
BOOL status;
|
||
|
||
ASSERT(this);
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
status = ctrl.unit[lun]->PlayAudioMSF(ctrl.cmd);
|
||
if (!status) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// status phase
|
||
Status();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// PLAY AUDIO TRACK
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdPlayAudioTrack()
|
||
{
|
||
DWORD lun;
|
||
BOOL status;
|
||
|
||
ASSERT(this);
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
status = ctrl.unit[lun]->PlayAudioTrack(ctrl.cmd);
|
||
if (!status) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// status phase
|
||
Status();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// MODE SELECT10
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdModeSelect10()
|
||
{
|
||
DWORD lun;
|
||
|
||
ASSERT(this);
|
||
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal, "MODE SELECT10 Command ");
|
||
#endif // DISK_LOG
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
ctrl.length = ctrl.unit[lun]->SelectCheck10(ctrl.cmd);
|
||
if (ctrl.length <= 0) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Data out phase
|
||
DataOut();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// MODE SENSE(10)
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdModeSense10()
|
||
{
|
||
DWORD lun;
|
||
|
||
ASSERT(this);
|
||
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal, "MODE SENSE(10) Command ");
|
||
#endif // DISK_LOG
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Command processing on drive
|
||
ctrl.length = ctrl.unit[lun]->ModeSense10(ctrl.cmd, ctrl.buffer);
|
||
ASSERT(ctrl.length >= 0);
|
||
if (ctrl.length == 0) {
|
||
Log(Log::Warning,
|
||
"Not supported MODE SENSE(10) page $%02X", ctrl.cmd[2]);
|
||
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Data-in Phase
|
||
DataIn();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// GET MESSAGE(10)
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdGetMessage10()
|
||
{
|
||
DWORD lun;
|
||
SCSIBR *bridge;
|
||
|
||
ASSERT(this);
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Error if not a host bridge
|
||
if (ctrl.unit[lun]->GetID() != MAKEID('S', 'C', 'B', 'R')) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Reallocate buffer (because it is not transfer for each block)
|
||
if (ctrl.bufsize < 0x1000000) {
|
||
free(ctrl.buffer);
|
||
ctrl.bufsize = 0x1000000;
|
||
ctrl.buffer = (BYTE *)malloc(ctrl.bufsize);
|
||
}
|
||
|
||
// Process with drive
|
||
bridge = (SCSIBR*)ctrl.unit[lun];
|
||
ctrl.length = bridge->GetMessage10(ctrl.cmd, ctrl.buffer);
|
||
|
||
if (ctrl.length <= 0) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Set next block
|
||
ctrl.blocks = 1;
|
||
ctrl.next = 1;
|
||
|
||
// Data in phase
|
||
DataIn();
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// SEND MESSAGE(10)
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::CmdSendMessage10()
|
||
{
|
||
DWORD lun;
|
||
|
||
ASSERT(this);
|
||
|
||
// Logical Unit
|
||
lun = (ctrl.cmd[1] >> 5) & 0x07;
|
||
if (!ctrl.unit[lun]) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Error if not a host bridge
|
||
if (ctrl.unit[lun]->GetID() != MAKEID('S', 'C', 'B', 'R')) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Reallocate buffer (because it is not transfer for each block)
|
||
if (ctrl.bufsize < 0x1000000) {
|
||
free(ctrl.buffer);
|
||
ctrl.bufsize = 0x1000000;
|
||
ctrl.buffer = (BYTE *)malloc(ctrl.bufsize);
|
||
}
|
||
|
||
// Set transfer amount
|
||
ctrl.length = ctrl.cmd[6];
|
||
ctrl.length <<= 8;
|
||
ctrl.length |= ctrl.cmd[7];
|
||
ctrl.length <<= 8;
|
||
ctrl.length |= ctrl.cmd[8];
|
||
|
||
if (ctrl.length <= 0) {
|
||
// Failure (Error)
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Set next block
|
||
ctrl.blocks = 1;
|
||
ctrl.next = 1;
|
||
|
||
// Light phase
|
||
DataOut();
|
||
}
|
||
|
||
//===========================================================================
|
||
//
|
||
// Data Transfer
|
||
//
|
||
//===========================================================================
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// Send data
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::Send()
|
||
{
|
||
#ifdef RASCSI
|
||
int len;
|
||
#endif // RASCSI
|
||
BOOL result;
|
||
|
||
ASSERT(this);
|
||
ASSERT(!ctrl.bus->GetREQ());
|
||
ASSERT(ctrl.bus->GetIO());
|
||
|
||
#ifdef RASCSI
|
||
//if Length! = 0, send
|
||
if (ctrl.length != 0) {
|
||
len = ctrl.bus->SendHandShake(
|
||
&ctrl.buffer[ctrl.offset], ctrl.length);
|
||
|
||
// If you cannot send all, move to status phase
|
||
if (len != (int)ctrl.length) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// offset and length
|
||
ctrl.offset += ctrl.length;
|
||
ctrl.length = 0;
|
||
return;
|
||
}
|
||
#else
|
||
// offset and length
|
||
ASSERT(ctrl.length >= 1);
|
||
ctrl.offset++;
|
||
ctrl.length--;
|
||
|
||
// Immediately after ACK is asserted, if the data has been
|
||
// set by SendNext, raise the request
|
||
if (ctrl.length != 0) {
|
||
// Signal line operated by the target
|
||
ctrl.bus->SetREQ(TRUE);
|
||
return;
|
||
}
|
||
#endif // RASCSI
|
||
|
||
// Block subtraction, result initialization
|
||
ctrl.blocks--;
|
||
result = TRUE;
|
||
|
||
// Processing after data collection (read/data-in only)
|
||
if (ctrl.phase == BUS::datain) {
|
||
if (ctrl.blocks != 0) {
|
||
// // set next buffer (set offset, length)
|
||
result = XferIn(ctrl.buffer);
|
||
#ifndef RASCSI
|
||
ctrl.bus->SetDAT(ctrl.buffer[ctrl.offset]);
|
||
#endif // RASCSI
|
||
}
|
||
}
|
||
|
||
// If result FALSE, move to status phase
|
||
if (!result) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Continue sending if block !=0
|
||
if (ctrl.blocks != 0){
|
||
ASSERT(ctrl.length > 0);
|
||
ASSERT(ctrl.offset == 0);
|
||
#ifndef RASCSI
|
||
// Signal line operated by the target
|
||
ctrl.bus->SetREQ(TRUE);
|
||
#endif // RASCSI
|
||
return;
|
||
}
|
||
|
||
// Move to next phase
|
||
switch (ctrl.phase) {
|
||
// Message in phase
|
||
case BUS::msgin:
|
||
// Completed sending response to extended message of IDENTIFY message
|
||
if (scsi.atnmsg) {
|
||
// flag off
|
||
scsi.atnmsg = FALSE;
|
||
|
||
// command phase
|
||
Command();
|
||
} else {
|
||
// Bus free phase
|
||
BusFree();
|
||
}
|
||
break;
|
||
|
||
// Data-in Phase
|
||
case BUS::datain:
|
||
// status phase
|
||
Status();
|
||
break;
|
||
|
||
// status phase
|
||
case BUS::status:
|
||
// Message in phase
|
||
ctrl.length = 1;
|
||
ctrl.blocks = 1;
|
||
ctrl.buffer[0] = (BYTE)ctrl.message;
|
||
MsgIn();
|
||
break;
|
||
|
||
// Other (impossible)
|
||
default:
|
||
ASSERT(FALSE);
|
||
break;
|
||
}
|
||
}
|
||
|
||
#ifndef RASCSI
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// Continue data transmission.....
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::SendNext()
|
||
{
|
||
ASSERT(this);
|
||
|
||
// REQ is up
|
||
ASSERT(ctrl.bus->GetREQ());
|
||
ASSERT(ctrl.bus->GetIO());
|
||
|
||
// Signal line operated by the target
|
||
ctrl.bus->SetREQ(FALSE);
|
||
|
||
// If there is data in the buffer, set it first
|
||
if (ctrl.length > 1) {
|
||
ctrl.bus->SetDAT(ctrl.buffer[ctrl.offset + 1]);
|
||
}
|
||
}
|
||
#endif // RASCSI
|
||
|
||
#ifndef RASCSI
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// Receive data
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::Receive()
|
||
{
|
||
DWORD data;
|
||
|
||
ASSERT(this);
|
||
|
||
// Req is up
|
||
ASSERT(ctrl.bus->GetREQ());
|
||
ASSERT(!ctrl.bus->GetIO());
|
||
|
||
// Get data
|
||
data = (DWORD)ctrl.bus->GetDAT();
|
||
|
||
// Signal line operated by the target
|
||
ctrl.bus->SetREQ(FALSE);
|
||
|
||
switch (ctrl.phase) {
|
||
// Command phase
|
||
case BUS::command:
|
||
ctrl.cmd[ctrl.offset] = data;
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal, "Command phase $%02X", data);
|
||
#endif // DISK_LOG
|
||
|
||
// Set the length again with the first data (offset 0)
|
||
if (ctrl.offset == 0) {
|
||
if (ctrl.cmd[0] >= 0x20) {
|
||
// 10バイトCDB
|
||
ctrl.length = 10;
|
||
}
|
||
}
|
||
break;
|
||
|
||
// Message out phase
|
||
case BUS::msgout:
|
||
ctrl.message = data;
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal, "Message out phase $%02X", data);
|
||
#endif // DISK_LOG
|
||
break;
|
||
|
||
// Data out phase
|
||
case BUS::dataout:
|
||
ctrl.buffer[ctrl.offset] = (BYTE)data;
|
||
break;
|
||
|
||
// Other (impossible)
|
||
default:
|
||
ASSERT(FALSE);
|
||
break;
|
||
}
|
||
}
|
||
#endif // RASCSI
|
||
|
||
#ifdef RASCSI
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// Receive Data
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::Receive()
|
||
#else
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// Continue receiving data
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
void FASTCALL SCSIDEV::ReceiveNext()
|
||
#endif // RASCSI
|
||
{
|
||
#ifdef RASCSI
|
||
int len;
|
||
#endif // RASCSI
|
||
BOOL result;
|
||
int i;
|
||
BYTE data;
|
||
|
||
ASSERT(this);
|
||
|
||
// REQ is low
|
||
ASSERT(!ctrl.bus->GetREQ());
|
||
ASSERT(!ctrl.bus->GetIO());
|
||
|
||
#ifdef RASCSI
|
||
// Length != 0 if received
|
||
if (ctrl.length != 0) {
|
||
// Receive
|
||
len = ctrl.bus->ReceiveHandShake(
|
||
&ctrl.buffer[ctrl.offset], ctrl.length);
|
||
|
||
// If not able to receive all, move to status phase
|
||
if (len != (int)ctrl.length) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Offset and Length
|
||
ctrl.offset += ctrl.length;
|
||
ctrl.length = 0;;
|
||
return;
|
||
}
|
||
#else
|
||
// Offset and Length
|
||
ASSERT(ctrl.length >= 1);
|
||
ctrl.offset++;
|
||
ctrl.length--;
|
||
|
||
// If length!=0, set req again
|
||
if (ctrl.length != 0) {
|
||
// Signal line operated by the target
|
||
ctrl.bus->SetREQ(TRUE);
|
||
return;
|
||
}
|
||
#endif // RASCSI
|
||
|
||
// Block subtraction, result initialization
|
||
ctrl.blocks--;
|
||
result = TRUE;
|
||
|
||
// Processing after receiving data (by phase)
|
||
switch (ctrl.phase) {
|
||
|
||
// Data out phase
|
||
case BUS::dataout:
|
||
if (ctrl.blocks == 0) {
|
||
// End with this buffer
|
||
result = XferOut(FALSE);
|
||
} else {
|
||
// Continue to next buffer (set offset, length)
|
||
result = XferOut(TRUE);
|
||
}
|
||
break;
|
||
|
||
// Message out phase
|
||
case BUS::msgout:
|
||
ctrl.message = ctrl.buffer[0];
|
||
if (!XferMsg(ctrl.message)) {
|
||
// Immediately free the bus if message output fails
|
||
BusFree();
|
||
return;
|
||
}
|
||
|
||
// Clear message data in preparation for message-in
|
||
ctrl.message = 0x00;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
// If result FALSE, move to status phase
|
||
if (!result) {
|
||
Error();
|
||
return;
|
||
}
|
||
|
||
// Continue to receive if block !=0
|
||
if (ctrl.blocks != 0){
|
||
ASSERT(ctrl.length > 0);
|
||
ASSERT(ctrl.offset == 0);
|
||
#ifndef RASCSI
|
||
// Signal line operated by the target
|
||
ctrl.bus->SetREQ(TRUE);
|
||
#endif // RASCSI
|
||
return;
|
||
}
|
||
|
||
// Move to next phase
|
||
switch (ctrl.phase) {
|
||
// Command phase
|
||
case BUS::command:
|
||
#ifdef RASCSI
|
||
// Command data transfer
|
||
len = 6;
|
||
if (ctrl.buffer[0] >= 0x20 && ctrl.buffer[0] <= 0x7D) {
|
||
// 10 byte CDB
|
||
len = 10;
|
||
}
|
||
for (i = 0; i < len; i++) {
|
||
ctrl.cmd[i] = (DWORD)ctrl.buffer[i];
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal, "Command $%02X", ctrl.cmd[i]);
|
||
#endif // DISK_LOG
|
||
}
|
||
#endif // RASCSI
|
||
|
||
// Execution Phase
|
||
Execute();
|
||
break;
|
||
|
||
// Message out phase
|
||
case BUS::msgout:
|
||
// Continue message out phase as long as ATN keeps asserting
|
||
if (ctrl.bus->GetATN()) {
|
||
// Data transfer is 1 byte x 1 block
|
||
ctrl.offset = 0;
|
||
ctrl.length = 1;
|
||
ctrl.blocks = 1;
|
||
#ifndef RASCSI
|
||
// Request message
|
||
ctrl.bus->SetREQ(TRUE);
|
||
#endif // RASCSI
|
||
return;
|
||
}
|
||
|
||
// Parsing messages sent by ATN
|
||
if (scsi.atnmsg) {
|
||
i = 0;
|
||
while (i < scsi.msc) {
|
||
// Message type
|
||
data = scsi.msb[i];
|
||
|
||
// ABORT
|
||
if (data == 0x06) {
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal,
|
||
"Message code ABORT $%02X", data);
|
||
#endif // DISK_LOG
|
||
BusFree();
|
||
return;
|
||
}
|
||
|
||
// BUS DEVICE RESET
|
||
if (data == 0x0C) {
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal,
|
||
"Message code BUS DEVICE RESET $%02X", data);
|
||
#endif // DISK_LOG
|
||
scsi.syncoffset = 0;
|
||
BusFree();
|
||
return;
|
||
}
|
||
|
||
// IDENTIFY
|
||
if (data >= 0x80) {
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal,
|
||
"Message code IDENTIFY $%02X", data);
|
||
#endif // DISK_LOG
|
||
}
|
||
|
||
// Extended Message
|
||
if (data == 0x01) {
|
||
#if defined(DISK_LOG)
|
||
Log(Log::Normal,
|
||
"Message code EXTENDED MESSAGE $%02X", data);
|
||
#endif // DISK_LOG
|
||
|
||
// Check only when synchronous transfer is possible
|
||
if (!scsi.syncenable || scsi.msb[i + 2] != 0x01) {
|
||
ctrl.length = 1;
|
||
ctrl.blocks = 1;
|
||
ctrl.buffer[0] = 0x07;
|
||
MsgIn();
|
||
return;
|
||
}
|
||
|
||
// Transfer period factor (limited to 50 x 4 = 200ns)
|
||
scsi.syncperiod = scsi.msb[i + 3];
|
||
if (scsi.syncperiod > 50) {
|
||
scsi.syncoffset = 50;
|
||
}
|
||
|
||
// REQ/ACK offset(limited to 16)
|
||
scsi.syncoffset = scsi.msb[i + 4];
|
||
if (scsi.syncoffset > 16) {
|
||
scsi.syncoffset = 16;
|
||
}
|
||
|
||
// STDR response message generation
|
||
ctrl.length = 5;
|
||
ctrl.blocks = 1;
|
||
ctrl.buffer[0] = 0x01;
|
||
ctrl.buffer[1] = 0x03;
|
||
ctrl.buffer[2] = 0x01;
|
||
ctrl.buffer[3] = (BYTE)scsi.syncperiod;
|
||
ctrl.buffer[4] = (BYTE)scsi.syncoffset;
|
||
MsgIn();
|
||
return;
|
||
}
|
||
|
||
// next
|
||
i++;
|
||
}
|
||
}
|
||
|
||
// Initialize ATN message reception status
|
||
scsi.atnmsg = FALSE;
|
||
|
||
// Command phase
|
||
Command();
|
||
break;
|
||
|
||
// Data out phase
|
||
case BUS::dataout:
|
||
// Flush unit
|
||
FlushUnit();
|
||
|
||
// status phase
|
||
Status();
|
||
break;
|
||
|
||
// Other (impossible)
|
||
default:
|
||
ASSERT(FALSE);
|
||
break;
|
||
}
|
||
}
|
||
|
||
//---------------------------------------------------------------------------
|
||
//
|
||
// Transfer MSG
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
BOOL FASTCALL SCSIDEV::XferMsg(DWORD msg)
|
||
{
|
||
ASSERT(this);
|
||
ASSERT(ctrl.phase == BUS::msgout);
|
||
|
||
// Save message out data
|
||
if (scsi.atnmsg) {
|
||
scsi.msb[scsi.msc] = (BYTE)msg;
|
||
scsi.msc++;
|
||
scsi.msc %= 256;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|