The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      $NetBSD: ukphy_subr.c,v 1.6.8.1 2004/08/12 18:16:01 jmc Exp $   */
    2 
    3 /*-
    4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
    9  * NASA Ames Research Center, and by Frank van der Linden.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. All advertising materials mentioning features or use of this software
   20  *    must display the following acknowledgement:
   21  *      This product includes software developed by the NetBSD
   22  *      Foundation, Inc. and its contributors.
   23  * 4. Neither the name of The NetBSD Foundation nor the names of its
   24  *    contributors may be used to endorse or promote products derived
   25  *    from this software without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   37  * POSSIBILITY OF SUCH DAMAGE.
   38  */
   39 
   40 /*
   41  * Subroutines shared by the ukphy driver and other PHY drivers.
   42  */
   43 
   44 #include <sys/cdefs.h>
   45 __KERNEL_RCSID(0, "$NetBSD: ukphy_subr.c,v 1.6.8.1 2004/08/12 18:16:01 jmc Exp $");
   46 
   47 #include <sys/param.h>
   48 #include <sys/systm.h>
   49 #include <sys/kernel.h>
   50 #include <sys/device.h>
   51 #include <sys/socket.h>
   52 
   53 #include <net/if.h>
   54 #include <net/if_media.h>
   55 
   56 #include <dev/mii/mii.h>
   57 #include <dev/mii/miivar.h>
   58 
   59 /*
   60  * Media status subroutine.  If a PHY driver does media detection simply
   61  * by decoding the NWay autonegotiation, use this routine.
   62  */
   63 void
   64 ukphy_status(struct mii_softc *phy)
   65 {
   66         struct mii_data *mii = phy->mii_pdata;
   67         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
   68         int bmsr, bmcr, anlpar, gtcr, gtsr;
   69 
   70         mii->mii_media_status = IFM_AVALID;
   71         mii->mii_media_active = IFM_ETHER;
   72 
   73         bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
   74         if (bmsr & BMSR_LINK)
   75                 mii->mii_media_status |= IFM_ACTIVE;
   76 
   77         bmcr = PHY_READ(phy, MII_BMCR);
   78         if (bmcr & BMCR_ISO) {
   79                 mii->mii_media_active |= IFM_NONE;
   80                 mii->mii_media_status = 0;
   81                 return;
   82         }
   83 
   84         if (bmcr & BMCR_LOOP)
   85                 mii->mii_media_active |= IFM_LOOP;
   86 
   87         if (bmcr & BMCR_AUTOEN) {
   88                 /*
   89                  * NWay autonegotiation takes the highest-order common
   90                  * bit of the ANAR and ANLPAR (i.e. best media advertised
   91                  * both by us and our link partner).
   92                  */
   93                 if ((bmsr & BMSR_ACOMP) == 0) {
   94                         /* Erg, still trying, I guess... */
   95                         mii->mii_media_active |= IFM_NONE;
   96                         return;
   97                 }
   98 
   99                 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
  100                 if ((phy->mii_flags & MIIF_HAVE_GTCR) != 0 &&
  101                     (phy->mii_extcapabilities &
  102                      (EXTSR_1000THDX|EXTSR_1000TFDX)) != 0) {
  103                         gtcr = PHY_READ(phy, MII_100T2CR);
  104                         gtsr = PHY_READ(phy, MII_100T2SR);
  105                 } else
  106                         gtcr = gtsr = 0;
  107 
  108                 if ((gtcr & GTCR_ADV_1000TFDX) && (gtsr & GTSR_LP_1000TFDX))
  109                         mii->mii_media_active |= IFM_1000_T|IFM_FDX;
  110                 else if ((gtcr & GTCR_ADV_1000THDX) &&
  111                          (gtsr & GTSR_LP_1000THDX))
  112                         mii->mii_media_active |= IFM_1000_T;
  113                 else if (anlpar & ANLPAR_T4)
  114                         mii->mii_media_active |= IFM_100_T4;
  115                 else if (anlpar & ANLPAR_TX_FD)
  116                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  117                 else if (anlpar & ANLPAR_TX)
  118                         mii->mii_media_active |= IFM_100_TX;
  119                 else if (anlpar & ANLPAR_10_FD)
  120                         mii->mii_media_active |= IFM_10_T|IFM_FDX;
  121                 else if (anlpar & ANLPAR_10)
  122                         mii->mii_media_active |= IFM_10_T;
  123                 else
  124                         mii->mii_media_active |= IFM_NONE;
  125 
  126                 if ((mii->mii_media_active & IFM_1000_T) &&
  127                     (gtsr & GTSR_MS_RES))
  128                         mii->mii_media_active |= IFM_ETH_MASTER;
  129         } else
  130                 mii->mii_media_active = ife->ifm_media;
  131 }

Cache object: 88f751f0b0116fd08c5d0d286d8522b3


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