FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/ukphy_subr.c

     /*      $NetBSD: ukphy_subr.c,v 1.2 1998/11/05 04:08:02 thorpej Exp $   */
     
     /*-
      * Copyright (c) 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
      * NASA Ames Research Center, and by Frank van der Linden.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the NetBSD
     *      Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    /*
     * Subroutines shared by the ukphy driver and other PHY drivers.
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/socket.h>
    #include <sys/module.h>
    #include <sys/bus.h>
    
    #include <net/if.h>
    #include <net/if_media.h>
    
    #include <dev/mii/mii.h>
    #include <dev/mii/miivar.h>
    
    #include "miibus_if.h"
    
    /*
     * Media status subroutine.  If a PHY driver does media detection simply
     * by decoding the NWay autonegotiation, use this routine.
     */
    void
    ukphy_status(struct mii_softc *phy)
    {
            struct mii_data *mii = phy->mii_pdata;
            struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
            int bmsr, bmcr, anlpar;
    
            mii->mii_media_status = IFM_AVALID;
            mii->mii_media_active = IFM_ETHER;
    
            bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
            if (bmsr & BMSR_LINK)
                    mii->mii_media_status |= IFM_ACTIVE;
    
            bmcr = PHY_READ(phy, MII_BMCR);
            if (bmcr & BMCR_ISO) {
                    mii->mii_media_active |= IFM_NONE;
                    mii->mii_media_status = 0;
                    return;
            }
    
            if (bmcr & BMCR_LOOP)
                    mii->mii_media_active |= IFM_LOOP;
    
            if (bmcr & BMCR_AUTOEN) {
                    /*
                     * NWay autonegotiation takes the highest-order common
                     * bit of the ANAR and ANLPAR (i.e. best media advertised
                     * both by us and our link partner).
                     */
                    if ((bmsr & BMSR_ACOMP) == 0) {
                            /* Erg, still trying, I guess... */
                            mii->mii_media_active |= IFM_NONE;
                            return;
                    }
   
                   anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
                   if (anlpar & ANLPAR_T4)
                           mii->mii_media_active |= IFM_100_T4;
                   else if (anlpar & ANLPAR_TX_FD)
                           mii->mii_media_active |= IFM_100_TX|IFM_FDX;
                   else if (anlpar & ANLPAR_TX)
                           mii->mii_media_active |= IFM_100_TX;
                   else if (anlpar & ANLPAR_10_FD)
                           mii->mii_media_active |= IFM_10_T|IFM_FDX;
                   else if (anlpar & ANLPAR_10)
                           mii->mii_media_active |= IFM_10_T;
                   else
                           mii->mii_media_active |= IFM_NONE;
           } else
                   mii->mii_media_active = ife->ifm_media;
   }

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