/*
* $Id$
*
* 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.block.floppy;
import java.nio.channels.ClosedByInterruptException;
import java.util.ArrayList;
import javax.naming.NamingException;
import org.apache.log4j.Logger;
import org.jnode.driver.DeviceAlreadyRegisteredException;
import org.jnode.driver.DeviceManager;
import org.jnode.driver.Driver;
import org.jnode.driver.DriverException;
import org.jnode.driver.block.floppy.support.FloppyDeviceFactory;
import org.jnode.driver.block.floppy.support.FloppyDriverUtils;
import org.jnode.naming.InitialNaming;
import org.jnode.system.resource.ResourceNotFreeException;
import org.jnode.util.TimeoutException;
/**
* @author epr
*/
public class FloppyControllerDriver extends Driver {
/**
* My logger
*/
private static final Logger log = Logger.getLogger(FloppyControllerDriver.class);
/**
* The controller
*/
private FDC fdc;
/**
* The global devicemanager
*/
private DeviceManager devMan;
/**
* All floppy drive devices controlled by this controller
*/
private final ArrayList<FloppyDevice> devices = new ArrayList<FloppyDevice>();
private FloppyControllerBus bus;
/**
* Start the device.
*
* @throws DriverException
*/
protected void startDevice()
throws DriverException {
try {
devices.clear();
fdc = FloppyDriverUtils.getFloppyDeviceFactory().createFDC(getDevice());
bus = new FloppyControllerBus(this);
registerDevices();
} catch (FloppyException ex) {
throw new DriverException("Cannot register drives", ex);
} catch (ResourceNotFreeException ex) {
throw new DriverException("Cannot claim all resources", ex);
} catch (NamingException ex) {
throw new DriverException("Cannot obtain device factory", ex);
}
}
/**
* Stop the device.
*
* @throws DriverException
*/
protected void stopDevice()
throws DriverException {
unregisterDevices();
if (fdc != null) {
fdc.release();
fdc = null;
}
devices.clear();
devMan = null;
}
/**
* Register all existing floppy drives
*
* @throws FloppyException
* @throws DriverException
* @throws NamingException
*/
protected void registerDevices()
throws FloppyException, DriverException, NamingException {
devMan = InitialNaming.lookup(DeviceManager.NAME);
final int max = fdc.getDriveCount();
final FloppyDeviceFactory factory = FloppyDriverUtils.getFloppyDeviceFactory();
for (int i = 0; i < max; i++) {
final FloppyDriveParameters dp = fdc.getDriveParams(i);
log.debug("For fd" + i + ", found CMOS type " + dp.getCmosType());
if (dp.isPresent()) {
try {
final FloppyDevice fd = factory.createDevice(bus, i, dp);
fd.setDriver(new FloppyDriver());
devMan.register(fd);
devices.add(fd);
log.debug("Registered fd" + i);
} catch (DeviceAlreadyRegisteredException ex) {
log.error("Cannot register fd" + i, ex);
}
}
}
}
/**
* Unregister all floppy drive devices.
*
* @throws DriverException
*/
protected void unregisterDevices()
throws DriverException {
for (FloppyDevice fd : devices) {
devMan.unregister(fd);
}
}
/**
* Has the disk changed since the last command?
*
* @param drive
* @param resetFlag
* @return boolean
*/
protected final boolean diskChanged(int drive, boolean resetFlag) {
return fdc.diskChanged(drive, resetFlag);
}
/**
* Add the given command to the command queue and wait till the command
* has finished.
*
* @param cmd
* @param timeout
* @throws ClosedByInterruptException
* @throws TimeoutException
*/
protected final void executeAndWait(FloppyCommand cmd, long timeout)
throws ClosedByInterruptException, TimeoutException {
try {
fdc.executeAndWait(cmd, timeout);
} catch (InterruptedException ex) {
throw new ClosedByInterruptException();
}
}
/**
* Reset the controller
*/
protected final void resetFDC() {
log.debug("Reset FDC");
fdc.reset();
}
}