PLLInfo.java example

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jnode-master
/*
 * $Id$
 *
 * 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.video.ati.radeon;

import org.jnode.system.resource.MemoryResource;

/**
 * @author Ewout Prangsma (epr@users.sourceforge.net)
 */
final class PLLInfo implements RadeonConstants {

    private final int maxPllFreq;

    private final int minPllFreq;

    private final int xclk;

    private final int ref_div;

    private final int ref_clk;

    /**
     * Initialize this instance with default values based on the architecture.
     * 
     * @param architecture
     */
    PLLInfo(int architecture) {
        // Depends on card, use the lowest for now
        this.maxPllFreq = 35000;
        this.minPllFreq = 12500;
        switch (architecture) {
            case Architecture.R200:
                this.ref_clk = 2700;
                this.ref_div = 12;
                this.xclk = 27500;
                break;
            case Architecture.RV250:
                this.ref_clk = 2700;
                this.ref_div = 12;
                this.xclk = 24975;
                break;
            case Architecture.RV200:
                this.ref_clk = 2700;
                this.ref_div = 12;
                this.xclk = 23000;
                break;
            default:
                this.ref_clk = 2700;
                this.ref_div = 67;
                this.xclk = 16615;
        }
    }

    /**
     * Initialize this instance from the BIOS ROM.
     * 
     * @param biosRom
     */
    PLLInfo(MemoryResource biosRom) {
        final int biosHdr = biosRom.getChar(0x48);
        final int pllInfo = biosRom.getChar(biosHdr + 0x30);

        this.xclk = biosRom.getChar(pllInfo + 0x08);
        this.ref_clk = biosRom.getChar(pllInfo + 0x0e);
        this.ref_div = biosRom.getChar(pllInfo + 0x10);
        this.minPllFreq = biosRom.getInt(pllInfo + 0x12);
        this.maxPllFreq = biosRom.getInt(pllInfo + 0x16);
    }

    /**
     * @return Returns the ppll_max.
     */
    public final int getMaxPllFreq() {
        return this.maxPllFreq;
    }

    /**
     * @return Returns the ppll_min.
     */
    public final int getMinPllFreq() {
        return this.minPllFreq;
    }

    /**
     * @return Returns the ref_clk.
     */
    public final int getRef_clk() {
        return this.ref_clk;
    }

    /**
     * @return Returns the ref_div.
     */
    public final int getRef_div() {
        return this.ref_div;
    }

    /**
     * @return Returns the xclk.
     */
    public final int getXclk() {
        return this.xclk;
    }

    /**
     * Convert to a string representation.
     * 
     * @see java.lang.Object#toString()
     */
    public String toString() {
        return "ref_clk:" + ref_clk + ", ref_div:" + ref_div + ", minPllFreq:" + minPllFreq +
                ", maxPllFreq:" + maxPllFreq + ", xclk:" + xclk;
    }
}