sys/dev/mii/ukphy_subr.c

   1 /*      $NetBSD: ukphy_subr.c,v 1.10 2008/04/28 20:23:53 martin 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 /*
  34  * Subroutines shared by the ukphy driver and other PHY drivers.
  35  */
  36
  37 #include <sys/cdefs.h>
  38 __KERNEL_RCSID(0, "$NetBSD: ukphy_subr.c,v 1.10 2008/04/28 20:23:53 martin Exp $");
  39
  40 #include <sys/param.h>
  41 #include <sys/systm.h>
  42 #include <sys/kernel.h>
  43 #include <sys/device.h>
  44 #include <sys/socket.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 /*
  53  * Media status subroutine.  If a PHY driver does media detection simply
  54  * by decoding the NWay autonegotiation, use this routine.
  55  */
  56 void
  57 ukphy_status(struct mii_softc *phy)
  58 {
  59         struct mii_data *mii = phy->mii_pdata;
  60         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  61         int bmsr, bmcr, anlpar, gtcr, gtsr;
  62
  63         mii->mii_media_status = IFM_AVALID;
  64         mii->mii_media_active = IFM_ETHER;
  65
  66         bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
  67         if (bmsr & BMSR_LINK)
  68                 mii->mii_media_status |= IFM_ACTIVE;
  69
  70         bmcr = PHY_READ(phy, MII_BMCR);
  71         if (bmcr & BMCR_ISO) {
  72                 mii->mii_media_active |= IFM_NONE;
  73                 mii->mii_media_status = 0;
  74                 return;
  75         }
  76
  77         if (bmcr & BMCR_LOOP)
  78                 mii->mii_media_active |= IFM_LOOP;
  79
  80         if (bmcr & BMCR_AUTOEN) {
  81                 /*
  82                  * NWay autonegotiation takes the highest-order common
  83                  * bit of the ANAR and ANLPAR (i.e. best media advertised
  84                  * both by us and our link partner).
  85                  */
  86                 if ((bmsr & BMSR_ACOMP) == 0) {
  87                         /* Erg, still trying, I guess... */
  88                         mii->mii_media_active |= IFM_NONE;
  89                         return;
  90                 }
  91
  92                 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
  93                 if ((phy->mii_flags & MIIF_HAVE_GTCR) != 0 &&
  94                     (phy->mii_extcapabilities &
  95                      (EXTSR_1000THDX|EXTSR_1000TFDX)) != 0) {
  96                         gtcr = PHY_READ(phy, MII_100T2CR);
  97                         gtsr = PHY_READ(phy, MII_100T2SR);
  98                 } else
  99                         gtcr = gtsr = 0;
 100
 101                 if ((gtcr & GTCR_ADV_1000TFDX) && (gtsr & GTSR_LP_1000TFDX))
 102                         mii->mii_media_active |= IFM_1000_T|IFM_FDX;
 103                 else if ((gtcr & GTCR_ADV_1000THDX) &&
 104                          (gtsr & GTSR_LP_1000THDX))
 105                         mii->mii_media_active |= IFM_1000_T;
 106                 else if (anlpar & ANLPAR_TX_FD)
 107                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
 108                 else if (anlpar & ANLPAR_T4)
 109                         mii->mii_media_active |= IFM_100_T4;
 110                 else if (anlpar & ANLPAR_TX)
 111                         mii->mii_media_active |= IFM_100_TX;
 112                 else if (anlpar & ANLPAR_10_FD)
 113                         mii->mii_media_active |= IFM_10_T|IFM_FDX;
 114                 else if (anlpar & ANLPAR_10)
 115                         mii->mii_media_active |= IFM_10_T;
 116                 else
 117                         mii->mii_media_active |= IFM_NONE;
 118
 119                 if ((mii->mii_media_active & IFM_1000_T) &&
 120                     (gtsr & GTSR_MS_RES))
 121                         mii->mii_media_active |= IFM_ETH_MASTER;
 122
 123                 if (mii->mii_media_active & IFM_FDX)
 124                         mii->mii_media_active |= mii_phy_flowstatus(phy);
 125         } else
 126                 mii->mii_media_active = ife->ifm_media;
 127 }