/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.driver.bus.ide.atapi;
import org.apache.log4j.Logger;
import org.jnode.driver.Bus;
import org.jnode.driver.Device;
import org.jnode.driver.DeviceAlreadyRegisteredException;
import org.jnode.driver.DeviceManager;
import org.jnode.driver.Driver;
import org.jnode.driver.DriverException;
import org.jnode.driver.bus.ide.IDEBus;
import org.jnode.driver.bus.ide.IDEDevice;
import org.jnode.driver.bus.ide.command.IDEPacketCommand;
import org.jnode.driver.bus.scsi.CDB;
import org.jnode.driver.bus.scsi.SCSIDevice;
import org.jnode.driver.bus.scsi.SCSIException;
import org.jnode.driver.bus.scsi.SCSIHostControllerAPI;
import org.jnode.driver.bus.scsi.cdb.spc.CDBInquiry;
import org.jnode.driver.bus.scsi.cdb.spc.InquiryData;
import org.jnode.util.NumberUtils;
import org.jnode.util.TimeoutException;
/**
* @author epr
*/
public class ATAPIDriver extends Driver implements SCSIHostControllerAPI {
private ATAPIBus atapiBus;
private ATAPISCSIDevice scsiDevice;
private static final Logger log = Logger.getLogger(ATAPIDriver.class);
/**
* @see org.jnode.driver.Driver#startDevice()
*/
protected void startDevice() throws DriverException {
final Device ideDev = getDevice();
// Register my api's
ideDev.registerAPI(SCSIHostControllerAPI.class, this);
// Create the ATAPI bus
this.atapiBus = new ATAPIBus(ideDev);
// Create the generic SCSI device, attached to the ATAPI bus
scsiDevice = new ATAPISCSIDevice(atapiBus, "_sg");
// Execute INQUIRY
try {
scsiDevice.inquiry();
} catch (SCSIException ex) {
throw new DriverException("Cannot INQUIRY device due to SCSIException", ex);
} catch (TimeoutException ex) {
throw new DriverException("Cannot INQUIRY device due to TimeoutException", ex);
} catch (InterruptedException ex) {
throw new DriverException("Interrupted while INQUIRY device", ex);
}
// Register the generic SCSI device.
try {
final DeviceManager dm = ideDev.getManager();
synchronized (dm) {
dm.rename(scsiDevice, "sg", true);
dm.register(scsiDevice);
dm.rename(ideDev, SCSIHostControllerAPI.DEVICE_PREFIX, true);
}
} catch (DeviceAlreadyRegisteredException ex) {
throw new DriverException(ex);
}
}
/**
* @see org.jnode.driver.Driver#stopDevice()
*/
protected void stopDevice() throws DriverException {
final Device ideDev = getDevice();
// Unregister the SCSI device
try {
ideDev.getManager().unregister(scsiDevice);
} finally {
scsiDevice = null;
atapiBus = null;
}
// Unregister my api's
ideDev.unregisterAPI(SCSIHostControllerAPI.class);
}
/**
* ATAPI bus implementation.
*
* @author Ewout Prangsma (epr@users.sourceforge.net)
*/
static class ATAPIBus extends Bus {
public ATAPIBus(Device dev) {
super(dev);
}
}
class ATAPISCSIDevice extends SCSIDevice {
private InquiryData inquiryResult;
/**
* Initialize this instance.
*
* @param bus
* @param id
*/
public ATAPISCSIDevice(ATAPIBus bus, String id) {
super(bus, id);
}
/**
* (non-Javadoc)
*
* @see org.jnode.driver.bus.scsi.SCSIDevice#executeCommand(org.jnode.driver.bus.scsi.CDB, byte[], int, long)
*/
public final int executeCommand(CDB cdb, byte[] data,
int dataOffset, long timeout) throws SCSIException,
TimeoutException, InterruptedException {
final IDEDevice dev = (IDEDevice) getDevice();
final IDEBus bus = (IDEBus) dev.getBus();
final IDEPacketCommand cmd = new IDEPacketCommand(
dev.isPrimary(), dev.isMaster(), cdb.toByteArray(), data,
dataOffset);
bus.executeAndWait(cmd, timeout);
if (!cmd.isFinished()) {
throw new TimeoutException("Timeout in SCSI command");
} else if (cmd.hasError()) {
throw new SCSIException("Command error 0x" + NumberUtils.hex(cmd.getError(), 2));
} else {
return cmd.getDataTransfered();
}
}
/**
* Execute an INQUUIRY command.
*
* @throws SCSIException
* @throws TimeoutException
* @throws InterruptedException
*/
protected final void inquiry() throws SCSIException, TimeoutException,
InterruptedException {
final byte[] inqData = new byte[96];
scsiDevice.executeCommand(new CDBInquiry(inqData.length), inqData,
0, 50000);
inquiryResult = new InquiryData(inqData);
log.debug("INQUIRY Data : " + inquiryResult.toString());
}
/**
* (non-Javadoc)
*
* @see org.jnode.driver.bus.scsi.SCSIDevice#getDescriptor()
*/
public final InquiryData getDescriptor() {
return inquiryResult;
}
}
}