amphy.c

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    1 /*      $OpenBSD: amphy.c,v 1.22 2022/04/06 18:59:29 naddy Exp $        */
    2 
    3 /*
    4  * Copyright (c) 1997, 1998, 1999
    5  *      Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *      This product includes software developed by Bill Paul.
   18  * 4. Neither the name of the author nor the names of any co-contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
   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
   32  * THE POSSIBILITY OF SUCH DAMAGE.
   33  *
   34  * $FreeBSD: src/sys/dev/mii/amphy.c,v 1.3 2000/04/19 14:57:29 phk Exp $
   35  */
   36 
   37 /*
   38  * driver for AMD AM79c873 PHYs
   39  * This driver also works for the Davicom DM9101 PHY, which appears to
   40  * be an AM79c873 workalike.
   41  */
   42 
   43 #include <sys/param.h>
   44 #include <sys/systm.h>
   45 #include <sys/device.h>
   46 #include <sys/socket.h>
   47 
   48 #include <net/if.h>
   49 #include <net/if_var.h>
   50 #include <net/if_media.h>
   51 
   52 #include <dev/mii/mii.h>
   53 #include <dev/mii/miivar.h>
   54 #include <dev/mii/miidevs.h>
   55 
   56 #include <dev/mii/amphyreg.h>
   57 
   58 int     amphymatch(struct device *, void *, void *);
   59 void    amphyattach(struct device *, struct device *, void *);
   60 
   61 const struct cfattach amphy_ca = {
   62         sizeof(struct mii_softc), amphymatch, amphyattach, mii_phy_detach
   63 };
   64 
   65 struct cfdriver amphy_cd = {
   66         NULL, "amphy", DV_DULL
   67 };
   68 
   69 int     amphy_service(struct mii_softc *, struct mii_data *, int);
   70 void    amphy_status(struct mii_softc *);
   71 
   72 const struct mii_phy_funcs amphy_funcs = {
   73         amphy_service, amphy_status, mii_phy_reset,
   74 };
   75 
   76 static const struct mii_phydesc amphys[] = {
   77         { MII_OUI_xxAMD,                MII_MODEL_xxAMD_79C873,
   78           MII_STR_xxAMD_79C873 },
   79         { MII_OUI_xxDAVICOM,            MII_MODEL_xxDAVICOM_DM9101,
   80           MII_STR_xxDAVICOM_DM9101 },
   81         { MII_OUI_DAVICOM,              MII_MODEL_DAVICOM_DM9102,
   82           MII_STR_DAVICOM_DM9102 },
   83         { MII_OUI_DAVICOM,              MII_MODEL_DAVICOM_DM9601,
   84           MII_STR_DAVICOM_DM9601 },
   85         { MII_OUI_xxALTIMA,             MII_MODEL_AMD_79C875phy,
   86           MII_STR_AMD_79C875phy },
   87 
   88         { 0,                            0,
   89           NULL },
   90 };
   91 
   92 int
   93 amphymatch(struct device *parent, void *match, void *aux)
   94 {
   95         struct mii_attach_args *ma = aux;
   96 
   97         if (mii_phy_match(ma, amphys) != NULL)
   98                 return (10);
   99 
  100         return (0);
  101 }
  102 
  103 void
  104 amphyattach(struct device *parent, struct device *self, void *aux)
  105 {
  106         struct mii_softc *sc = (struct mii_softc *)self;
  107         struct mii_attach_args *ma = aux;
  108         struct mii_data *mii = ma->mii_data;
  109         const struct mii_phydesc *mpd;
  110 
  111         mpd = mii_phy_match(ma, amphys);
  112         printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
  113 
  114         sc->mii_inst = mii->mii_instance;
  115         sc->mii_phy = ma->mii_phyno;
  116         sc->mii_funcs = &amphy_funcs;
  117         sc->mii_pdata = mii;
  118         sc->mii_flags = ma->mii_flags;
  119 
  120         sc->mii_flags |= MIIF_NOISOLATE;
  121 
  122         PHY_RESET(sc);
  123 
  124         sc->mii_capabilities =
  125             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  126         if (sc->mii_capabilities & BMSR_MEDIAMASK)
  127                 mii_phy_add_media(sc);
  128 }
  129 
  130 int
  131 amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  132 {
  133         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  134         int reg;
  135 
  136         switch (cmd) {
  137         case MII_POLLSTAT:
  138                 /*
  139                  * If we're not polling our PHY instance, just return.
  140                  */
  141                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  142                         return (0);
  143                 break;
  144 
  145         case MII_MEDIACHG:
  146                 /*
  147                  * If the media indicates a different PHY instance,
  148                  * isolate ourselves.
  149                  */
  150                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  151                         reg = PHY_READ(sc, MII_BMCR);
  152                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  153                         return (0);
  154                 }
  155 
  156                 /*
  157                  * If the interface is not up, don't do anything.
  158                  */
  159                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  160                         break;
  161 
  162                 mii_phy_setmedia(sc);
  163                 break;
  164 
  165         case MII_TICK:
  166                 /*
  167                  * If we're not currently selected, just return.
  168                  */
  169                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  170                         return (0);
  171 
  172                 if (mii_phy_tick(sc) == EJUSTRETURN)
  173                         return (0);
  174                 break;
  175         case MII_DOWN:
  176                 mii_phy_down(sc);
  177                 return (0);
  178         }
  179 
  180         /* Update the media status. */
  181         mii_phy_status(sc);
  182 
  183         /* Callback if something changed. */
  184         mii_phy_update(sc, cmd);
  185         return (0);
  186 }
  187 
  188 void
  189 amphy_status(struct mii_softc *sc)
  190 {
  191         struct mii_data *mii = sc->mii_pdata;
  192         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  193         int bmsr, bmcr, par, anlpar;
  194 
  195         mii->mii_media_status = IFM_AVALID;
  196         mii->mii_media_active = IFM_ETHER;
  197 
  198         bmsr = PHY_READ(sc, MII_BMSR) |
  199             PHY_READ(sc, MII_BMSR);
  200         if (bmsr & BMSR_LINK)
  201                 mii->mii_media_status |= IFM_ACTIVE;
  202 
  203         bmcr = PHY_READ(sc, MII_BMCR);
  204         if (bmcr & BMCR_ISO) {
  205                 mii->mii_media_active |= IFM_NONE;
  206                 mii->mii_media_status = 0;
  207                 return;
  208         }
  209 
  210         if (bmcr & BMCR_LOOP)
  211                 mii->mii_media_active |= IFM_LOOP;
  212 
  213         if (bmcr & BMCR_AUTOEN) {
  214                 /*
  215                  * The PAR status bits are only valid if autonegotiation
  216                  * has completed (or it's disabled).
  217                  */
  218                 if ((bmsr & BMSR_ACOMP) == 0) {
  219                         /* Erg, still trying, I guess... */
  220                         mii->mii_media_active |= IFM_NONE;
  221                         return;
  222                 }
  223 
  224                 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
  225                         anlpar = PHY_READ(sc, MII_ANAR) &
  226                             PHY_READ(sc, MII_ANLPAR);
  227                         if (anlpar & ANLPAR_TX_FD)
  228                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  229                         else if (anlpar & ANLPAR_T4)
  230                                 mii->mii_media_active |= IFM_100_T4|IFM_HDX;
  231                         else if (anlpar & ANLPAR_TX)
  232                                 mii->mii_media_active |= IFM_100_TX|IFM_HDX;
  233                         else if (anlpar & ANLPAR_10_FD)
  234                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
  235                         else if (anlpar & ANLPAR_10)
  236                                 mii->mii_media_active |= IFM_10_T|IFM_HDX;
  237                         else
  238                                 mii->mii_media_active |= IFM_NONE;
  239                         return;
  240                 }
  241 
  242                 /*
  243                  * Link partner is not capable of autonegotiation.
  244                  */
  245                 par = PHY_READ(sc, MII_AMPHY_DSCSR);
  246                 if (par & DSCSR_100FDX)
  247                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  248                 else if (par & DSCSR_100HDX)
  249                         mii->mii_media_active |= IFM_100_TX|IFM_HDX;
  250                 else if (par & DSCSR_10FDX)
  251                         mii->mii_media_active |= IFM_10_T|IFM_FDX;
  252                 else if (par & DSCSR_10HDX)
  253                         mii->mii_media_active |= IFM_10_T|IFM_HDX;
  254         } else
  255                 mii->mii_media_active = ife->ifm_media;
  256 }

Cache object: 5089a34f2c33ccf8716050d216004e89

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

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sys/dev/mii/amphy.c