src/add-ons/kernel/drivers/network/ar81xx/dev/mii/ukphy_subr.c

   1 /*      $NetBSD: ukphy_subr.c,v 1.2 1998/11/05 04:08:02 thorpej 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  *
  20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 /*
  37  * Subroutines shared by the ukphy driver and other PHY drivers.
  38  */
  39
  40 #include <sys/param.h>
  41 #include <sys/systm.h>
  42 #include <sys/socket.h>
  43 #include <sys/module.h>
  44 #include <sys/bus.h>
  45
  46 #include <net/if.h>
  47 #include <net/if_media.h>
  48
  49 #include <dev/mii/mii.h>
  50 #include <dev/mii/miivar.h>
  51
  52 #include "miibus_if.h"
  53
  54 /*
  55  * Media status subroutine.  If a PHY driver does media detection simply
  56  * by decoding the NWay autonegotiation, use this routine.
  57  */
  58 void
  59 ukphy_status(struct mii_softc *phy)
  60 {
  61         struct mii_data *mii = phy->mii_pdata;
  62         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  63         int bmsr, bmcr, anlpar, gtcr, gtsr;
  64
  65         mii->mii_media_status = IFM_AVALID;
  66         mii->mii_media_active = IFM_ETHER;
  67
  68         bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
  69         if (bmsr & BMSR_LINK)
  70                 mii->mii_media_status |= IFM_ACTIVE;
  71
  72         bmcr = PHY_READ(phy, MII_BMCR);
  73         if (bmcr & BMCR_ISO) {
  74                 mii->mii_media_active |= IFM_NONE;
  75                 mii->mii_media_status = 0;
  76                 return;
  77         }
  78
  79         if (bmcr & BMCR_LOOP)
  80                 mii->mii_media_active |= IFM_LOOP;
  81
  82         if (bmcr & BMCR_AUTOEN) {
  83                 /*
  84                  * NWay autonegotiation takes the highest-order common
  85                  * bit of the ANAR and ANLPAR (i.e. best media advertised
  86                  * both by us and our link partner).
  87                  */
  88                 if ((bmsr & BMSR_ACOMP) == 0) {
  89                         /* Erg, still trying, I guess... */
  90                         mii->mii_media_active |= IFM_NONE;
  91                         return;
  92                 }
  93
  94                 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
  95                 if ((phy->mii_flags & MIIF_HAVE_GTCR) != 0 &&
  96                     (phy->mii_extcapabilities &
  97                     (EXTSR_1000THDX | EXTSR_1000TFDX)) != 0) {
  98                         gtcr = PHY_READ(phy, MII_100T2CR);
  99                         gtsr = PHY_READ(phy, MII_100T2SR);
 100                 } else
 101                         gtcr = gtsr = 0;
 102
 103                 if ((gtcr & GTCR_ADV_1000TFDX) && (gtsr & GTSR_LP_1000TFDX))
 104                         mii->mii_media_active |= IFM_1000_T|IFM_FDX;
 105                 else if ((gtcr & GTCR_ADV_1000THDX) &&
 106                     (gtsr & GTSR_LP_1000THDX))
 107                         mii->mii_media_active |= IFM_1000_T|IFM_HDX;
 108                 else if (anlpar & ANLPAR_TX_FD)
 109                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
 110                 else if (anlpar & ANLPAR_T4)
 111                         mii->mii_media_active |= IFM_100_T4|IFM_HDX;
 112                 else if (anlpar & ANLPAR_TX)
 113                         mii->mii_media_active |= IFM_100_TX|IFM_HDX;
 114                 else if (anlpar & ANLPAR_10_FD)
 115                         mii->mii_media_active |= IFM_10_T|IFM_FDX;
 116                 else if (anlpar & ANLPAR_10)
 117                         mii->mii_media_active |= IFM_10_T|IFM_HDX;
 118                 else
 119                         mii->mii_media_active |= IFM_NONE;
 120
 121                 if ((mii->mii_media_active & IFM_1000_T) != 0 &&
 122                     (gtsr & GTSR_MS_RES) != 0)
 123                         mii->mii_media_active |= IFM_ETH_MASTER;
 124
 125                 if ((mii->mii_media_active & IFM_FDX) != 0)
 126                         mii->mii_media_active |= mii_phy_flowstatus(phy);
 127         } else
 128                 mii->mii_media_active = ife->ifm_media;
 129 }