pnaphy.c

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    1 /*      $NetBSD: pnaphy.c,v 1.10 2003/04/29 01:49:34 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 generic HomePNA 1.0 PHYs.
   40  *
   41  * HomePNA 1.0 PHYs are pretty simple -- they support exactly one
   42  * media type, and don't do autonegotiation.
   43  *
   44  * HomePNA PHYs often have vendor-specific registers for tuning
   45  * the network connection, but we don't deal with any of that
   46  * at all.
   47  */
   48 
   49 #include <sys/cdefs.h>
   50 __KERNEL_RCSID(0, "$NetBSD: pnaphy.c,v 1.10 2003/04/29 01:49:34 thorpej Exp $");
   51 
   52 #include <sys/param.h>
   53 #include <sys/systm.h>
   54 #include <sys/kernel.h>
   55 #include <sys/device.h>
   56 #include <sys/socket.h>
   57 #include <sys/errno.h>
   58 
   59 #include <net/if.h>
   60 #include <net/if_media.h>
   61 
   62 #include <dev/mii/mii.h>
   63 #include <dev/mii/miivar.h>
   64 #include <dev/mii/miidevs.h>
   65 
   66 int     pnaphymatch(struct device *, struct cfdata *, void *);
   67 void    pnaphyattach(struct device *, struct device *, void *);
   68 
   69 CFATTACH_DECL(pnaphy, sizeof(struct mii_softc),
   70     pnaphymatch, pnaphyattach, mii_phy_detach, mii_phy_activate);
   71 
   72 int     pnaphy_service(struct mii_softc *, struct mii_data *, int);
   73 void    pnaphy_status(struct mii_softc *);
   74 
   75 const struct mii_phy_funcs pnaphy_funcs = {
   76         pnaphy_service, pnaphy_status, mii_phy_reset,
   77 };
   78 
   79 const struct mii_phydesc pnaphys[] = {
   80         { MII_OUI_yyAMD,                MII_MODEL_yyAMD_79c901home,
   81           MII_STR_yyAMD_79c901home },
   82 
   83         { 0,                            0,
   84           NULL },
   85 };
   86 
   87 int
   88 pnaphymatch(struct device *parent, struct cfdata *match, void *aux)
   89 {
   90         struct mii_attach_args *ma = aux;
   91 
   92         if (mii_phy_match(ma, pnaphys) != NULL) {
   93                 /*
   94                  * Match higher than ukphy, but lower than a specific
   95                  * driver would match.
   96                  */
   97                 return (2);
   98         }
   99 
  100         return (0);
  101 }
  102 
  103 void
  104 pnaphyattach(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, pnaphys);
  112         aprint_naive(": Media interface\n");
  113         aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
  114 
  115         sc->mii_inst = mii->mii_instance;
  116         sc->mii_phy = ma->mii_phyno;
  117         sc->mii_funcs = &pnaphy_funcs;
  118         sc->mii_pdata = mii;
  119         sc->mii_flags = ma->mii_flags | MIIF_IS_HPNA; /* force HomePNA */
  120         sc->mii_anegticks = 5;
  121 
  122         PHY_RESET(sc);
  123 
  124         sc->mii_capabilities =
  125             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  126         aprint_normal("%s: ", sc->mii_dev.dv_xname);
  127         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
  128                 aprint_error("no media present");
  129         else
  130                 mii_phy_add_media(sc);
  131         aprint_normal("\n");
  132 }
  133 
  134 int
  135 pnaphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  136 {
  137         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  138         int reg;
  139 
  140         switch (cmd) {
  141         case MII_POLLSTAT:
  142                 /*
  143                  * If we're not polling our PHY instance, just return.
  144                  */
  145                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  146                         return (0);
  147                 break;
  148 
  149         case MII_MEDIACHG:
  150                 /*
  151                  * If the media indicates a different PHY instance,
  152                  * isolate ourselves.
  153                  */
  154                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  155                         reg = PHY_READ(sc, MII_BMCR);
  156                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  157                         return (0);
  158                 }
  159 
  160                 /*
  161                  * If the interface is not up, don't do anything.
  162                  */
  163                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  164                         break;
  165 
  166                 mii_phy_setmedia(sc);
  167                 break;
  168 
  169         case MII_TICK:
  170                 /*
  171                  * If we're not currently selected, just return.
  172                  */
  173                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  174                         return (0);
  175 
  176                 if (mii_phy_tick(sc) == EJUSTRETURN)
  177                         return (0);
  178                 break;
  179 
  180         case MII_DOWN:
  181                 mii_phy_down(sc);
  182                 return (0);
  183         }
  184 
  185         /* Update the media status. */
  186         mii_phy_status(sc);
  187 
  188         /* Callback if something changed. */
  189         mii_phy_update(sc, cmd);
  190         return (0);
  191 }
  192 
  193 void
  194 pnaphy_status(struct mii_softc *sc)
  195 {
  196         struct mii_data *mii = sc->mii_pdata;
  197         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  198         int bmsr, bmcr;
  199 
  200         mii->mii_media_status = IFM_AVALID;
  201         mii->mii_media_active = IFM_ETHER;
  202 
  203         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  204 
  205         if (bmsr & BMSR_LINK)
  206                 mii->mii_media_status |= IFM_ACTIVE;
  207 
  208         bmcr = PHY_READ(sc, MII_BMCR);
  209         if (bmcr & BMCR_ISO) {
  210                 mii->mii_media_active |= IFM_NONE;
  211                 mii->mii_media_status = 0;
  212                 return;
  213         }
  214 
  215         if (bmcr & BMCR_LOOP)
  216                 mii->mii_media_active |= IFM_LOOP;
  217 
  218         /*
  219          * On HomePNA PHYs, the current media is always the selected
  220          * media.
  221          *
  222          * XXX May not be the case w/ HomePNA 2.
  223          */
  224         mii->mii_media_active = ife->ifm_media;
  225 }

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

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sys/dev/mii/pnaphy.c