ukphy_subr.c

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    1 /*      $NetBSD: ukphy_subr.c,v 1.2 1998/11/05 04:08:02 thorpej Exp $   */
    2 
    3 /*-
    4  * SPDX-License-Identifier: BSD-2-Clause-NetBSD
    5  *
    6  * Copyright (c) 1998 The NetBSD Foundation, Inc.
    7  * All rights reserved.
    8  *
    9  * This code is derived from software contributed to The NetBSD Foundation
   10  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   11  * NASA Ames Research Center, and by Frank van der Linden.
   12  *
   13  * Redistribution and use in source and binary forms, with or without
   14  * modification, are permitted provided that the following conditions
   15  * are met:
   16  * 1. Redistributions of source code must retain the above copyright
   17  *    notice, this list of conditions and the following disclaimer.
   18  * 2. Redistributions in binary form must reproduce the above copyright
   19  *    notice, this list of conditions and the following disclaimer in the
   20  *    documentation and/or other materials provided with the distribution.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   24  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   25  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   26  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   32  * POSSIBILITY OF SUCH DAMAGE.
   33  */
   34 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD$");
   37 
   38 /*
   39  * Subroutines shared by the ukphy driver and other PHY drivers.
   40  */
   41 
   42 #include <sys/param.h>
   43 #include <sys/systm.h>
   44 #include <sys/socket.h>
   45 #include <sys/module.h>
   46 #include <sys/bus.h>
   47 
   48 #include <net/if.h>
   49 #include <net/if_media.h>
   50 
   51 #include <dev/mii/mii.h>
   52 #include <dev/mii/miivar.h>
   53 
   54 #include "miibus_if.h"
   55 
   56 /*
   57  * Media status subroutine.  If a PHY driver does media detection simply
   58  * by decoding the NWay autonegotiation, use this routine.
   59  */
   60 void
   61 ukphy_status(struct mii_softc *phy)
   62 {
   63         struct mii_data *mii = phy->mii_pdata;
   64         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
   65         int bmsr, bmcr, anlpar, gtcr, gtsr;
   66 
   67         mii->mii_media_status = IFM_AVALID;
   68         mii->mii_media_active = IFM_ETHER;
   69 
   70         bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
   71         if (bmsr & BMSR_LINK)
   72                 mii->mii_media_status |= IFM_ACTIVE;
   73 
   74         bmcr = PHY_READ(phy, MII_BMCR);
   75         if (bmcr & BMCR_ISO) {
   76                 mii->mii_media_active |= IFM_NONE;
   77                 mii->mii_media_status = 0;
   78                 return;
   79         }
   80 
   81         if (bmcr & BMCR_LOOP)
   82                 mii->mii_media_active |= IFM_LOOP;
   83 
   84         if (bmcr & BMCR_AUTOEN) {
   85                 /*
   86                  * NWay autonegotiation takes the highest-order common
   87                  * bit of the ANAR and ANLPAR (i.e. best media advertised
   88                  * both by us and our link partner).
   89                  */
   90                 if ((bmsr & BMSR_ACOMP) == 0) {
   91                         /* Erg, still trying, I guess... */
   92                         mii->mii_media_active |= IFM_NONE;
   93                         return;
   94                 }
   95 
   96                 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
   97                 if ((phy->mii_flags & MIIF_HAVE_GTCR) != 0 &&
   98                     (phy->mii_extcapabilities &
   99                     (EXTSR_1000THDX | EXTSR_1000TFDX)) != 0) {
  100                         gtcr = PHY_READ(phy, MII_100T2CR);
  101                         gtsr = PHY_READ(phy, MII_100T2SR);
  102                 } else
  103                         gtcr = gtsr = 0;
  104 
  105                 if ((gtcr & GTCR_ADV_1000TFDX) && (gtsr & GTSR_LP_1000TFDX))
  106                         mii->mii_media_active |= IFM_1000_T|IFM_FDX;
  107                 else if ((gtcr & GTCR_ADV_1000THDX) &&
  108                     (gtsr & GTSR_LP_1000THDX))
  109                         mii->mii_media_active |= IFM_1000_T|IFM_HDX;
  110                 else if (anlpar & ANLPAR_TX_FD)
  111                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  112                 else if (anlpar & ANLPAR_T4)
  113                         mii->mii_media_active |= IFM_100_T4|IFM_HDX;
  114                 else if (anlpar & ANLPAR_TX)
  115                         mii->mii_media_active |= IFM_100_TX|IFM_HDX;
  116                 else if (anlpar & ANLPAR_10_FD)
  117                         mii->mii_media_active |= IFM_10_T|IFM_FDX;
  118                 else if (anlpar & ANLPAR_10)
  119                         mii->mii_media_active |= IFM_10_T|IFM_HDX;
  120                 else
  121                         mii->mii_media_active |= IFM_NONE;
  122 
  123                 if ((mii->mii_media_active & IFM_1000_T) != 0 &&
  124                     (gtsr & GTSR_MS_RES) != 0)
  125                         mii->mii_media_active |= IFM_ETH_MASTER;
  126 
  127                 if ((mii->mii_media_active & IFM_FDX) != 0)
  128                         mii->mii_media_active |= mii_phy_flowstatus(phy);
  129         } else
  130                 mii->mii_media_active = ife->ifm_media;
  131 }

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sys/dev/mii/ukphy_subr.c