amphy.c

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    1 /*
    2  * Copyright (c) 1997, 1998, 1999
    3  *      Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by Bill Paul.
   16  * 4. Neither the name of the author nor the names of any co-contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
   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
   30  * THE POSSIBILITY OF SUCH DAMAGE.
   31  *
   32  * $FreeBSD: releng/5.0/sys/dev/mii/amphy.c 105135 2002-10-14 22:31:52Z alfred $
   33  */
   34 
   35 /*
   36  * driver for AMD AM79c873 PHYs
   37  * This driver also works for the Davicom DM9101 PHY, which appears to
   38  * be an AM79c873 workalike.
   39  */
   40 
   41 #include <sys/param.h>
   42 #include <sys/systm.h>
   43 #include <sys/kernel.h>
   44 #include <sys/socket.h>
   45 #include <sys/bus.h>
   46 
   47 #include <net/if.h>
   48 #include <net/if_media.h>
   49 
   50 #include <dev/mii/mii.h>
   51 #include <dev/mii/miivar.h>
   52 #include <dev/mii/miidevs.h>
   53 
   54 #include <dev/mii/amphyreg.h>
   55 
   56 #include "miibus_if.h"
   57 
   58 #if !defined(lint)
   59 static const char rcsid[] =
   60   "$FreeBSD: releng/5.0/sys/dev/mii/amphy.c 105135 2002-10-14 22:31:52Z alfred $";
   61 #endif
   62 
   63 static int amphy_probe(device_t);
   64 static int amphy_attach(device_t);
   65 
   66 static device_method_t amphy_methods[] = {
   67         /* device interface */
   68         DEVMETHOD(device_probe,         amphy_probe),
   69         DEVMETHOD(device_attach,        amphy_attach),
   70         DEVMETHOD(device_detach,        mii_phy_detach),
   71         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   72         { 0, 0 }
   73 };
   74 
   75 static devclass_t amphy_devclass;
   76 
   77 static driver_t amphy_driver = {
   78         "amphy",
   79         amphy_methods,
   80         sizeof(struct mii_softc)
   81 };
   82 
   83 DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0);
   84 
   85 static int      amphy_service(struct mii_softc *, struct mii_data *, int);
   86 static void     amphy_status(struct mii_softc *);
   87 
   88 static int
   89 amphy_probe(dev)
   90         device_t                dev;
   91 {
   92         struct mii_attach_args *ma;
   93 
   94         ma = device_get_ivars(dev);
   95 
   96         if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxAMD ||
   97             MII_MODEL(ma->mii_id2) != MII_MODEL_xxAMD_79C873) &&
   98             (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxDAVICOM ||
   99             MII_MODEL(ma->mii_id2) != MII_MODEL_xxDAVICOM_DM9101))
  100                 return(ENXIO);
  101 
  102         if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxAMD)
  103                 device_set_desc(dev, MII_STR_xxAMD_79C873);
  104         else if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxDAVICOM)
  105                 device_set_desc(dev, MII_STR_xxDAVICOM_DM9101);
  106 
  107         return(0);
  108 }
  109 
  110 static int
  111 amphy_attach(dev)
  112         device_t                dev;
  113 {
  114         struct mii_softc *sc;
  115         struct mii_attach_args *ma;
  116         struct mii_data *mii;
  117 
  118         sc = device_get_softc(dev);
  119         ma = device_get_ivars(dev);
  120         sc->mii_dev = device_get_parent(dev);
  121         mii = device_get_softc(sc->mii_dev);
  122         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  123 
  124         sc->mii_inst = mii->mii_instance;
  125         sc->mii_phy = ma->mii_phyno;
  126         sc->mii_service = amphy_service;
  127         sc->mii_pdata = mii;
  128 
  129         sc->mii_flags |= MIIF_NOISOLATE;
  130         mii->mii_instance++;
  131 
  132 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  133 
  134         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
  135             BMCR_ISO);
  136 #if 0
  137         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
  138             BMCR_LOOP|BMCR_S100);
  139 #endif
  140 
  141         mii_phy_reset(sc);
  142 
  143         sc->mii_capabilities =
  144             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  145         device_printf(dev, " ");
  146         mii_add_media(sc);
  147         printf("\n");
  148 #undef ADD
  149         MIIBUS_MEDIAINIT(sc->mii_dev);
  150         return(0);
  151 }
  152 
  153 static int
  154 amphy_service(sc, mii, cmd)
  155         struct mii_softc *sc;
  156         struct mii_data *mii;
  157         int cmd;
  158 {
  159         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  160         int reg;
  161 
  162         switch (cmd) {
  163         case MII_POLLSTAT:
  164                 /*
  165                  * If we're not polling our PHY instance, just return.
  166                  */
  167                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  168                         return (0);
  169                 break;
  170 
  171         case MII_MEDIACHG:
  172                 /*
  173                  * If the media indicates a different PHY instance,
  174                  * isolate ourselves.
  175                  */
  176                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  177                         reg = PHY_READ(sc, MII_BMCR);
  178                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  179                         return (0);
  180                 }
  181 
  182                 /*
  183                  * If the interface is not up, don't do anything.
  184                  */
  185                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  186                         break;
  187 
  188                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  189                 case IFM_AUTO:
  190                         /*
  191                          * If we're already in auto mode, just return.
  192                          */
  193                         if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
  194                                 return (0);
  195                         (void) mii_phy_auto(sc);
  196                         break;
  197                 case IFM_100_T4:
  198                         /*
  199                          * XXX Not supported as a manual setting right now.
  200                          */
  201                         return (EINVAL);
  202                 default:
  203                         /*
  204                          * BMCR data is stored in the ifmedia entry.
  205                          */
  206                         PHY_WRITE(sc, MII_ANAR,
  207                             mii_anar(ife->ifm_media));
  208                         PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
  209                 }
  210                 break;
  211 
  212         case MII_TICK:
  213                 /*
  214                  * If we're not currently selected, just return.
  215                  */
  216                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  217                         return (0);
  218                 if (mii_phy_tick(sc) == EJUSTRETURN)
  219                         return (0);
  220                 break;
  221         }
  222 
  223         /* Update the media status. */
  224         amphy_status(sc);
  225 
  226         /* Callback if something changed. */
  227         mii_phy_update(sc, cmd);
  228         return (0);
  229 }
  230 
  231 static void
  232 amphy_status(sc)
  233         struct mii_softc *sc;
  234 {
  235         struct mii_data *mii = sc->mii_pdata;
  236         int bmsr, bmcr, par, anlpar;
  237 
  238         mii->mii_media_status = IFM_AVALID;
  239         mii->mii_media_active = IFM_ETHER;
  240 
  241         bmsr = PHY_READ(sc, MII_BMSR) |
  242             PHY_READ(sc, MII_BMSR);
  243         if (bmsr & BMSR_LINK)
  244                 mii->mii_media_status |= IFM_ACTIVE;
  245 
  246         bmcr = PHY_READ(sc, MII_BMCR);
  247         if (bmcr & BMCR_ISO) {
  248                 mii->mii_media_active |= IFM_NONE;
  249                 mii->mii_media_status = 0;
  250                 return;
  251         }
  252 
  253         if (bmcr & BMCR_LOOP)
  254                 mii->mii_media_active |= IFM_LOOP;
  255 
  256         if (bmcr & BMCR_AUTOEN) {
  257                 /*
  258                  * The PAR status bits are only valid of autonegotiation
  259                  * has completed (or it's disabled).
  260                  */
  261                 if ((bmsr & BMSR_ACOMP) == 0) {
  262                         /* Erg, still trying, I guess... */
  263                         mii->mii_media_active |= IFM_NONE;
  264                         return;
  265                 }
  266 
  267                 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
  268                         anlpar = PHY_READ(sc, MII_ANAR) &
  269                             PHY_READ(sc, MII_ANLPAR);
  270                         if (anlpar & ANLPAR_T4)
  271                                 mii->mii_media_active |= IFM_100_T4;
  272                         else if (anlpar & ANLPAR_TX_FD)
  273                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  274                         else if (anlpar & ANLPAR_TX)
  275                                 mii->mii_media_active |= IFM_100_TX;
  276                         else if (anlpar & ANLPAR_10_FD)
  277                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
  278                         else if (anlpar & ANLPAR_10)
  279                                 mii->mii_media_active |= IFM_10_T;
  280                         else
  281                                 mii->mii_media_active |= IFM_NONE;
  282                         return;
  283                 }
  284 
  285                 /*
  286                  * Link partner is not capable of autonegotiation.
  287                  */
  288                 par = PHY_READ(sc, MII_AMPHY_DSCSR);
  289                 if (par & DSCSR_100FDX)
  290                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  291                 else if (par & DSCSR_100HDX)
  292                         mii->mii_media_active |= IFM_100_TX;
  293                 else if (par & DSCSR_10FDX)
  294                         mii->mii_media_active |= IFM_10_T|IFM_HDX;
  295                 else if (par & DSCSR_10HDX)
  296                         mii->mii_media_active |= IFM_10_T;
  297         } else
  298                 mii->mii_media_active = mii_media_from_bmcr(bmcr);
  299 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/amphy.c

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