/*
* $Id$
*
* 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.usb.uhci;
import org.jnode.driver.bus.usb.SetupPacket;
import org.jnode.driver.bus.usb.USBConstants;
import org.jnode.driver.bus.usb.USBException;
import org.jnode.driver.bus.usb.USBPacket;
import org.jnode.driver.bus.usb.spi.AbstractUSBControlRequest;
/**
* @author Ewout Prangsma (epr@users.sourceforge.net)
*/
public class UHCIControlRequest extends AbstractUSBControlRequest implements UHCIRequest, USBConstants {
/**
* The first TD of this request
*/
private TransferDescriptor setupTD;
/**
* Initialize this instance
*
* @param setupPacket
* @param dataPacket
*/
public UHCIControlRequest(SetupPacket setupPacket, USBPacket dataPacket) {
super(setupPacket, dataPacket);
}
public void createTDs(UHCIPipe pipe)
throws USBException {
final SetupPacket setupPacket = getSetupPacket();
// The setup TD
setupTD = pipe.createTD(USB_PID_SETUP, true, setupPacket.getData(), 0, setupPacket.getSize(), false);
//log.debug("setupTD: " + setupTD + ", ls=" + ls);
// Add the data TD's
final USBPacket dataPacket = getDataPacket();
final int transferLength = setupPacket.getLength();
int length = transferLength;
int offset = 0;
final int dataPid = (setupPacket.isDirIn() ? USB_PID_IN : USB_PID_OUT);
boolean dataToggle = false; // Start with DATA1
final int maxPacketSize = pipe.getMaxPacketSize();
if (maxPacketSize <= 0) {
throw new USBException("Invalid maximum packet size " + maxPacketSize);
}
while (length > 0) {
// Create the TD for this part of the data packet
final TransferDescriptor dataTD;
final int curlen = Math.min(length, maxPacketSize);
dataTD = pipe.createTD(dataPid, dataToggle, dataPacket.getData(), offset, curlen, false);
// Add the TD to the list
setupTD.append(dataTD, false);
// Update fields
dataToggle = !dataToggle;
length -= curlen;
offset += curlen;
}
// Add final control packet
final TransferDescriptor statusTD;
final int statusPid = ((setupPacket.isDirOut() || (transferLength == 0)) ? USB_PID_IN : USB_PID_OUT);
statusTD = pipe.createTD(statusPid, false, null, 0, 0, true);
// Append theTD to the list
setupTD.append(statusTD, false);
}
/**
* Gets the first TD of this request.
*/
public TransferDescriptor getFirstTD() {
return setupTD;
}
/**
* @see java.lang.Object#toString()
*/
public String toString() {
return "setup[" + getSetupPacket() + ']';
}
}