/*
* $Id$
*
* 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.smbus;
import java.io.IOException;
import java.security.InvalidParameterException;
import org.apache.log4j.Logger;
import org.jnode.driver.Driver;
import org.jnode.driver.DriverException;
/**
* DIMM device driver.
* <p/>
* <p>
* Title:
* </p>
* <p>
* Description:
* </p>
* <p>
* Licence: GNU LGPL
* </p>
* <p>
* </p>
*
* @author Francois-Frederic Ozog
* @version 1.0
*/
public class DIMMDriver extends Driver {
private static final Logger log = Logger.getLogger(DIMMDriver.class);
private SMBus bus;
private byte address;
private DIMM dimmDevice;
private int spdTableLength = 0;
private byte[] spdTable = null;
public DIMMDriver(SMBus bus, byte address) {
this.bus = bus;
this.address = address;
}
protected void stopDevice() throws org.jnode.driver.DriverException {
/** @todo Implement this org.jnode.driver.Driver abstract method */
}
protected void startDevice() throws org.jnode.driver.DriverException {
dimmDevice = (DIMM) getDevice();
// now read the SPD table
try {
if (!DIMMDriver.canExist(bus, address))
throw new DriverException("Device doesn't exist");
log.debug("Getting SPD Table from " + dimmDevice.getId() + ':');
spdTableLength = (bus.readByte(address, (byte) 0)) & 0xff;
log.debug(" length=" + spdTableLength);
spdTable = new byte[spdTableLength];
spdTable[0] = (byte) spdTableLength;
for (int i = 1; i < spdTableLength; i++)
spdTable[i] = bus.readByte(address, (byte) i);
dimmDevice.setSPDTable(spdTable);
} catch (UnsupportedOperationException ex) {
//todo empty?
} catch (IOException ex) {
//todo empty?
} catch (InvalidParameterException ex) {
//todo empty?
}
}
public static boolean canExist(SMBus bus, byte address) {
try {
int spdTableLength = (bus.readByte(address, (byte) 0)) & 0xff;
if (spdTableLength < DIMM.SPDTABLE_SIZE) {
return false;
}
} catch (Exception ex) {
return false;
}
return true;
}
}