amhphy.c

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    1 /*      $NetBSD: amhphy.c,v 1.9 2003/04/29 01:49:33 thorpej Exp $       */
    2 
    3 /*
    4  * Copyright 2001 Wasabi Systems, Inc.
    5  * All rights reserved.
    6  *
    7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. All advertising materials mentioning features or use of this software
   18  *    must display the following acknowledgement:
   19  *      This product includes software developed for the NetBSD Project by
   20  *      Wasabi Systems, Inc.
   21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
   22  *    or promote products derived from this software without specific prior
   23  *    written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
   26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
   29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   35  * POSSIBILITY OF SUCH DAMAGE.
   36  */
   37 
   38 /*
   39  * Driver for the 10BASE-T portion of the AMD Am79c901 PHY.
   40  */
   41 
   42 #include <sys/cdefs.h>
   43 __KERNEL_RCSID(0, "$NetBSD: amhphy.c,v 1.9 2003/04/29 01:49:33 thorpej Exp $");
   44 
   45 #include <sys/param.h>
   46 #include <sys/systm.h>
   47 #include <sys/kernel.h>
   48 #include <sys/device.h>
   49 #include <sys/socket.h>
   50 #include <sys/errno.h>
   51 
   52 #include <net/if.h>
   53 #include <net/if_media.h>
   54 
   55 #include <dev/mii/mii.h>
   56 #include <dev/mii/miivar.h>
   57 #include <dev/mii/miidevs.h>
   58 
   59 #include <dev/mii/amhphyreg.h>
   60 
   61 int     amhphymatch(struct device *, struct cfdata *, void *);
   62 void    amhphyattach(struct device *, struct device *, void *);
   63 
   64 CFATTACH_DECL(amhphy, sizeof(struct mii_softc),
   65     amhphymatch, amhphyattach, mii_phy_detach, mii_phy_activate);
   66 
   67 int     amhphy_service(struct mii_softc *, struct mii_data *, int);
   68 void    amhphy_status(struct mii_softc *);
   69 
   70 const struct mii_phy_funcs amhphy_funcs = {
   71         amhphy_service, amhphy_status, mii_phy_reset,
   72 };
   73 
   74 const struct mii_phydesc amhphys[] = {
   75         { MII_OUI_yyAMD,                MII_MODEL_yyAMD_79c901,
   76           MII_STR_yyAMD_79c901 },
   77 
   78         { 0,                            0,
   79           NULL },
   80 };
   81 
   82 int
   83 amhphymatch(struct device *parent, struct cfdata *match, void *aux)
   84 {
   85         struct mii_attach_args *ma = aux;
   86 
   87         if (mii_phy_match(ma, amhphys) != NULL)
   88                 return (10);
   89 
   90         return (0);
   91 }
   92 
   93 void
   94 amhphyattach(struct device *parent, struct device *self, void *aux)
   95 {
   96         struct mii_softc *sc = (struct mii_softc *)self;
   97         struct mii_attach_args *ma = aux;
   98         struct mii_data *mii = ma->mii_data;
   99         const struct mii_phydesc *mpd;
  100 
  101         mpd = mii_phy_match(ma, amhphys);
  102         aprint_naive(": Media interface\n");
  103         aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
  104 
  105         sc->mii_inst = mii->mii_instance;
  106         sc->mii_phy = ma->mii_phyno;
  107         sc->mii_funcs = &amhphy_funcs;
  108         sc->mii_pdata = mii;
  109         sc->mii_flags = ma->mii_flags;
  110         sc->mii_anegticks = 5;
  111 
  112         PHY_RESET(sc);
  113 
  114         sc->mii_capabilities =
  115             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  116         aprint_normal("%s: ", sc->mii_dev.dv_xname);
  117         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
  118                 aprint_error("no media present");
  119         else
  120                 mii_phy_add_media(sc);
  121         aprint_normal("\n");
  122 }
  123 
  124 int
  125 amhphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  126 {
  127         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  128         int reg;
  129 
  130         switch (cmd) {
  131         case MII_POLLSTAT:
  132                 /*
  133                  * If we're not polling our PHY instance, just return.
  134                  */
  135                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  136                         return (0);
  137                 break;
  138 
  139         case MII_MEDIACHG:
  140                 /*
  141                  * If the media indicates a different PHY instance,
  142                  * isolate ourselves.
  143                  */
  144                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  145                         reg = PHY_READ(sc, MII_BMCR);
  146                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  147                         return (0);
  148                 }
  149 
  150                 /*
  151                  * If the interface is not up, don't do anything.
  152                  */
  153                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  154                         break;
  155 
  156                 mii_phy_setmedia(sc);
  157                 break;
  158 
  159         case MII_TICK:
  160                 /*
  161                  * If we're not currently selected, just return.
  162                  */
  163                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  164                         return (0);
  165 
  166                 if (mii_phy_tick(sc) == EJUSTRETURN)
  167                         return (0);
  168                 break;
  169 
  170         case MII_DOWN:
  171                 mii_phy_down(sc);
  172                 return (0);
  173         }
  174 
  175         /* Update the media status. */
  176         mii_phy_status(sc);
  177 
  178         /* Callback if something changed. */
  179         mii_phy_update(sc, cmd);
  180         return (0);
  181 }
  182 
  183 void
  184 amhphy_status(struct mii_softc *sc)
  185 {
  186         struct mii_data *mii = sc->mii_pdata;
  187         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  188         int bmsr, bmcr, ssr;
  189 
  190         mii->mii_media_status = IFM_AVALID;
  191         mii->mii_media_active = IFM_ETHER;
  192 
  193         bmsr = PHY_READ(sc, MII_BMSR);
  194         ssr = PHY_READ(sc, MII_AMHPHY_SSR);
  195 
  196         if (ssr & SSR_LS)
  197                 mii->mii_media_status |= IFM_ACTIVE;
  198 
  199         bmcr = PHY_READ(sc, MII_BMCR);
  200         if (bmcr & BMCR_ISO) {
  201                 mii->mii_media_active |= IFM_NONE;
  202                 mii->mii_media_status = 0;
  203                 return;
  204         }
  205 
  206         if (bmcr & BMCR_LOOP)
  207                 mii->mii_media_active |= IFM_LOOP;
  208 
  209         if (bmcr & BMCR_AUTOEN) {
  210                 /*
  211                  * The media status bits are only valid of autonegotiation
  212                  * has completed (or it's disabled).
  213                  */
  214                 if ((bmsr & BMSR_ACOMP) == 0) {
  215                         /* Erg, still trying, I guess... */
  216                         mii->mii_media_active |= IFM_NONE;
  217                         return;
  218                 }
  219 
  220                 if (ssr & SSR_S) {
  221                         /*
  222                          * This should't really ever happen, since it's
  223                          * a 10BASE-T only PHY.  But the bit exists,
  224                          * according to the documentation, so we pay
  225                          * attention to it.
  226                          */
  227                         mii->mii_media_active |= IFM_100_TX;
  228                 } else
  229                         mii->mii_media_active |= IFM_10_T;
  230                 if (ssr & SSR_FD)
  231                         mii->mii_media_active |= IFM_FDX;
  232         } else
  233                 mii->mii_media_active = ife->ifm_media;
  234 }

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

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sys/dev/mii/amhphy.c