/*
 * $Id$
 *
 * Copyright (C) 2003-2015 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.net.ne2000.pci;

import org.jnode.driver.Device;
import org.jnode.driver.DriverException;
import org.jnode.driver.bus.pci.PCIBaseAddress;
import org.jnode.driver.bus.pci.PCIDevice;
import org.jnode.driver.bus.pci.PCIHeaderType0;
import org.jnode.driver.net.ne2000.Ne2000Core;
import org.jnode.driver.net.ne2000.Ne2000Flags;
import org.jnode.system.resource.ResourceNotFreeException;
import org.jnode.system.resource.ResourceOwner;

/**
 * @author epr
 */
public class Ne2000PCI extends Ne2000Core {

    /**
     * Create a new instance
     *
     * @param owner
     * @param device
     * @param flags
     */
    public Ne2000PCI(Ne2000PCIDriver driver, ResourceOwner owner, PCIDevice device,
            Ne2000Flags flags) throws ResourceNotFreeException, DriverException {
        super(driver, owner, device, flags);
    }

    /**
     * Gets the first IO-Address used by the given device
     *
     * @param device
     * @param flags
     */
    protected int getIOBase(Device device, Ne2000Flags flags) throws DriverException {
        final PCIHeaderType0 config = ((PCIDevice) device).getConfig().asHeaderType0();
        final PCIBaseAddress[] addrs = config.getBaseAddresses();
        if (addrs.length < 1) {
            throw new DriverException("Cannot find iobase: not base addresses");
        }
        if (!addrs[0].isIOSpace()) {
            throw new DriverException("Cannot find iobase: first address is not I/O");
        }
        return addrs[0].getIOBase();
    }

    /**
     * Gets the number of IO-Addresses used by the given device
     *
     * @param device
     * @param flags
     */
    protected int getIOLength(Device device, Ne2000Flags flags) throws DriverException {
        final PCIHeaderType0 config = ((PCIDevice) device).getConfig().asHeaderType0();
        final PCIBaseAddress[] addrs = config.getBaseAddresses();
        if (addrs.length < 1) {
            throw new DriverException("Cannot find iobase: not base addresses");
        }
        if (!addrs[0].isIOSpace()) {
            throw new DriverException("Cannot find iobase: first address is not I/O");
        }
        return addrs[0].getSize();
    }

    /**
     * Gets the IRQ used by the given device
     *
     * @param device
     * @param flags
     */
    protected int getIRQ(Device device, Ne2000Flags flags) throws DriverException {
        final PCIHeaderType0 config = ((PCIDevice) device).getConfig().asHeaderType0();
        return config.getInterruptLine();
    }
}