lxtphy.c

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    1 /*      $OpenBSD: lxtphy.c,v 1.23 2022/04/06 18:59:29 naddy Exp $       */
    2 /*      $NetBSD: lxtphy.c,v 1.19 2000/02/02 23:34:57 thorpej Exp $      */
    3 
    4 /*-
    5  * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software contributed to The NetBSD Foundation
    9  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   10  * NASA Ames Research Center.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   31  * POSSIBILITY OF SUCH DAMAGE.
   32  */
   33 
   34 /*
   35  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
   36  *
   37  * Redistribution and use in source and binary forms, with or without
   38  * modification, are permitted provided that the following conditions
   39  * are met:
   40  * 1. Redistributions of source code must retain the above copyright
   41  *    notice, this list of conditions and the following disclaimer.
   42  * 2. Redistributions in binary form must reproduce the above copyright
   43  *    notice, this list of conditions and the following disclaimer in the
   44  *    documentation and/or other materials provided with the distribution.
   45  *
   46  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   47  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   48  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   49  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   50  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   51  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   52  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   53  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   54  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   55  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   56  */
   57 
   58 /*
   59  * driver for Level One's LXT-970/971 ethernet 10/100 PHY
   60  * datasheet from www.level1.com
   61  */
   62 
   63 #include <sys/param.h>
   64 #include <sys/systm.h>
   65 #include <sys/device.h>
   66 #include <sys/socket.h>
   67 #include <sys/errno.h>
   68 
   69 #include <net/if.h>
   70 #include <net/if_var.h>
   71 #include <net/if_media.h>
   72 
   73 #include <dev/mii/mii.h>
   74 #include <dev/mii/miivar.h>
   75 #include <dev/mii/miidevs.h>
   76 
   77 #include <dev/mii/lxtphyreg.h>
   78 
   79 int     lxtphymatch(struct device *, void *, void *);
   80 void    lxtphyattach(struct device *, struct device *, void *);
   81 
   82 const struct cfattach lxtphy_ca = {
   83         sizeof(struct mii_softc), lxtphymatch, lxtphyattach, mii_phy_detach
   84 };
   85 
   86 struct cfdriver lxtphy_cd = {
   87         NULL, "lxtphy", DV_DULL
   88 };
   89 
   90 int     lxtphy_service(struct mii_softc *, struct mii_data *, int);
   91 void    lxtphy_status(struct mii_softc *);
   92 void    lxtphy_reset(struct mii_softc *);
   93 
   94 const struct mii_phy_funcs lxtphy_funcs = {
   95         lxtphy_service, lxtphy_status, lxtphy_reset,
   96 };
   97 
   98 const struct mii_phy_funcs lxtphy971_funcs = {
   99         lxtphy_service, ukphy_status, lxtphy_reset,
  100 };
  101 
  102 static const struct mii_phydesc lxtphys[] = {
  103         { MII_OUI_xxLEVEL1,             MII_MODEL_xxLEVEL1_LXT970,
  104           MII_STR_xxLEVEL1_LXT970 },
  105         { MII_OUI_xxLEVEL1a,            MII_MODEL_xxLEVEL1a_LXT971,
  106           MII_STR_xxLEVEL1a_LXT971 },
  107 
  108         { 0,                    0,
  109           NULL },
  110 };
  111 
  112 int
  113 lxtphymatch(struct device *parent, void *match, void *aux)
  114 {
  115         struct mii_attach_args *ma = aux;
  116 
  117         if (mii_phy_match(ma, lxtphys) != NULL)
  118                 return (10);
  119 
  120         return (0);
  121 }
  122 
  123 void
  124 lxtphyattach(struct device *parent, struct device *self, void *aux)
  125 {
  126         struct mii_softc *sc = (struct mii_softc *)self;
  127         struct mii_attach_args *ma = aux;
  128         struct mii_data *mii = ma->mii_data;
  129         const struct mii_phydesc *mpd;
  130 
  131         if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxLEVEL1 &&
  132             MII_MODEL(ma->mii_id2) == MII_MODEL_xxLEVEL1_LXT970) {
  133                 sc->mii_funcs = &lxtphy_funcs;
  134         }
  135         if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxLEVEL1a &&
  136             MII_MODEL(ma->mii_id2) == MII_MODEL_xxLEVEL1a_LXT971) {
  137                 sc->mii_funcs = &lxtphy971_funcs;
  138         }
  139 
  140         mpd = mii_phy_match(ma, lxtphys);
  141         printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
  142 
  143         sc->mii_inst = mii->mii_instance;
  144         sc->mii_phy = ma->mii_phyno;
  145         sc->mii_pdata = mii;
  146         sc->mii_flags = ma->mii_flags;
  147 
  148         PHY_RESET(sc);
  149 
  150         sc->mii_capabilities =
  151             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  152         if (sc->mii_capabilities & BMSR_MEDIAMASK)
  153                 mii_phy_add_media(sc);
  154 }
  155 
  156 int
  157 lxtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  158 {
  159         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  160         int reg;
  161 
  162         if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
  163                 return (ENXIO);
  164 
  165         switch (cmd) {
  166         case MII_POLLSTAT:
  167                 /*
  168                  * If we're not polling our PHY instance, just return.
  169                  */
  170                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  171                         return (0);
  172                 break;
  173 
  174         case MII_MEDIACHG:
  175                 /*
  176                  * If the media indicates a different PHY instance,
  177                  * isolate ourselves.
  178                  */
  179                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  180                         reg = PHY_READ(sc, MII_BMCR);
  181                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  182                         return (0);
  183                 }
  184 
  185                 /*
  186                  * If the interface is not up, don't do anything.
  187                  */
  188                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  189                         break;
  190 
  191                 mii_phy_setmedia(sc);
  192                 break;
  193 
  194         case MII_TICK:
  195                 /*
  196                  * If we're not currently selected, just return.
  197                  */
  198                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  199                         return (0);
  200 
  201                 if (mii_phy_tick(sc) == EJUSTRETURN)
  202                         return (0);
  203                 break;
  204 
  205         case MII_DOWN:
  206                 mii_phy_down(sc);
  207                 return (0);
  208         }
  209 
  210         /* Update the media status. */
  211         mii_phy_status(sc);
  212 
  213         /* Callback if something changed. */
  214         mii_phy_update(sc, cmd);
  215         return (0);
  216 }
  217 
  218 void
  219 lxtphy_status(struct mii_softc *sc)
  220 {
  221         struct mii_data *mii = sc->mii_pdata;
  222         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  223         int bmcr, bmsr, csr;
  224 
  225         mii->mii_media_status = IFM_AVALID;
  226         mii->mii_media_active = IFM_ETHER;
  227 
  228         /*
  229          * Get link status from the CSR; we need to read the CSR
  230          * for media type anyhow, and the link status in the CSR
  231          * doesn't latch, so fewer register reads are required.
  232          */
  233         csr = PHY_READ(sc, MII_LXTPHY_CSR);
  234         if (csr & CSR_LINK)
  235                 mii->mii_media_status |= IFM_ACTIVE;
  236 
  237         bmcr = PHY_READ(sc, MII_BMCR);
  238         if (bmcr & BMCR_ISO) {
  239                 mii->mii_media_active |= IFM_NONE;
  240                 mii->mii_media_status = 0;
  241                 return;
  242         }
  243 
  244         if (bmcr & BMCR_LOOP)
  245                 mii->mii_media_active |= IFM_LOOP;
  246 
  247         if (bmcr & BMCR_AUTOEN) {
  248                 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  249                 if ((bmsr & BMSR_ACOMP) == 0) {
  250                         /* Erg, still trying, I guess... */
  251                         mii->mii_media_active |= IFM_NONE;
  252                         return;
  253                 }
  254                 if (csr & CSR_SPEED)
  255                         mii->mii_media_active |= IFM_100_TX;
  256                 else
  257                         mii->mii_media_active |= IFM_10_T;
  258 
  259                 if (csr & CSR_DUPLEX)
  260                         mii->mii_media_active |= IFM_FDX;
  261                 else
  262                         mii->mii_media_active |= IFM_HDX;
  263         } else
  264                 mii->mii_media_active = ife->ifm_media;
  265 }
  266 
  267 void
  268 lxtphy_reset(struct mii_softc *sc)
  269 {
  270         mii_phy_reset(sc);
  271         PHY_WRITE(sc, MII_LXTPHY_IER,
  272             PHY_READ(sc, MII_LXTPHY_IER) & ~IER_INTEN);
  273 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/lxtphy.c

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