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 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD$");
   35 
   36 /*
   37  * driver for AMD AM79c873 PHYs
   38  * This driver also works for the Davicom DM9101 PHY, which appears to
   39  * be an AM79c873 workalike.
   40  */
   41 
   42 #include <sys/param.h>
   43 #include <sys/systm.h>
   44 #include <sys/kernel.h>
   45 #include <sys/module.h>
   46 #include <sys/socket.h>
   47 #include <sys/bus.h>
   48 
   49 #include <net/if.h>
   50 #include <net/if_media.h>
   51 
   52 #include <dev/mii/mii.h>
   53 #include <dev/mii/miivar.h>
   54 #include "miidevs.h"
   55 
   56 #include <dev/mii/amphyreg.h>
   57 
   58 #include "miibus_if.h"
   59 
   60 static int amphy_probe(device_t);
   61 static int amphy_attach(device_t);
   62 
   63 static device_method_t amphy_methods[] = {
   64         /* device interface */
   65         DEVMETHOD(device_probe,         amphy_probe),
   66         DEVMETHOD(device_attach,        amphy_attach),
   67         DEVMETHOD(device_detach,        mii_phy_detach),
   68         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   69         { 0, 0 }
   70 };
   71 
   72 static devclass_t amphy_devclass;
   73 
   74 static driver_t amphy_driver = {
   75         "amphy",
   76         amphy_methods,
   77         sizeof(struct mii_softc)
   78 };
   79 
   80 DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0);
   81 
   82 static int      amphy_service(struct mii_softc *, struct mii_data *, int);
   83 static void     amphy_status(struct mii_softc *);
   84 
   85 static int
   86 amphy_probe(dev)
   87         device_t                dev;
   88 {
   89         struct mii_attach_args *ma;
   90 
   91         ma = device_get_ivars(dev);
   92 
   93         if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxAMD ||
   94             MII_MODEL(ma->mii_id2) != MII_MODEL_xxAMD_79C873) &&
   95             (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxDAVICOM ||
   96             MII_MODEL(ma->mii_id2) != MII_MODEL_xxDAVICOM_DM9101))
   97                 return(ENXIO);
   98 
   99         if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxAMD)
  100                 device_set_desc(dev, MII_STR_xxAMD_79C873);
  101         else if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxDAVICOM)
  102                 device_set_desc(dev, MII_STR_xxDAVICOM_DM9101);
  103 
  104         return(0);
  105 }
  106 
  107 static int
  108 amphy_attach(dev)
  109         device_t                dev;
  110 {
  111         struct mii_softc *sc;
  112         struct mii_attach_args *ma;
  113         struct mii_data *mii;
  114 
  115         sc = device_get_softc(dev);
  116         ma = device_get_ivars(dev);
  117         sc->mii_dev = device_get_parent(dev);
  118         mii = device_get_softc(sc->mii_dev);
  119         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  120 
  121         sc->mii_inst = mii->mii_instance;
  122         sc->mii_phy = ma->mii_phyno;
  123         sc->mii_service = amphy_service;
  124         sc->mii_pdata = mii;
  125 
  126         sc->mii_flags |= MIIF_NOISOLATE;
  127         mii->mii_instance++;
  128 
  129 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  130 
  131         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
  132             BMCR_ISO);
  133 #if 0
  134         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
  135             BMCR_LOOP|BMCR_S100);
  136 #endif
  137 
  138         mii_phy_reset(sc);
  139 
  140         sc->mii_capabilities =
  141             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  142         device_printf(dev, " ");
  143         mii_add_media(sc);
  144         printf("\n");
  145 #undef ADD
  146         MIIBUS_MEDIAINIT(sc->mii_dev);
  147         return(0);
  148 }
  149 
  150 static int
  151 amphy_service(sc, mii, cmd)
  152         struct mii_softc *sc;
  153         struct mii_data *mii;
  154         int cmd;
  155 {
  156         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  157         int reg;
  158 
  159         switch (cmd) {
  160         case MII_POLLSTAT:
  161                 /*
  162                  * If we're not polling our PHY instance, just return.
  163                  */
  164                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  165                         return (0);
  166                 break;
  167 
  168         case MII_MEDIACHG:
  169                 /*
  170                  * If the media indicates a different PHY instance,
  171                  * isolate ourselves.
  172                  */
  173                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  174                         reg = PHY_READ(sc, MII_BMCR);
  175                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  176                         return (0);
  177                 }
  178 
  179                 /*
  180                  * If the interface is not up, don't do anything.
  181                  */
  182                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  183                         break;
  184 
  185                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  186                 case IFM_AUTO:
  187                         /*
  188                          * If we're already in auto mode, just return.
  189                          */
  190                         if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
  191                                 return (0);
  192                         (void) mii_phy_auto(sc);
  193                         break;
  194                 case IFM_100_T4:
  195                         /*
  196                          * XXX Not supported as a manual setting right now.
  197                          */
  198                         return (EINVAL);
  199                 default:
  200                         /*
  201                          * BMCR data is stored in the ifmedia entry.
  202                          */
  203                         PHY_WRITE(sc, MII_ANAR,
  204                             mii_anar(ife->ifm_media));
  205                         PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
  206                 }
  207                 break;
  208 
  209         case MII_TICK:
  210                 /*
  211                  * If we're not currently selected, just return.
  212                  */
  213                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  214                         return (0);
  215                 if (mii_phy_tick(sc) == EJUSTRETURN)
  216                         return (0);
  217                 break;
  218         }
  219 
  220         /* Update the media status. */
  221         amphy_status(sc);
  222 
  223         /* Callback if something changed. */
  224         mii_phy_update(sc, cmd);
  225         return (0);
  226 }
  227 
  228 static void
  229 amphy_status(sc)
  230         struct mii_softc *sc;
  231 {
  232         struct mii_data *mii = sc->mii_pdata;
  233         int bmsr, bmcr, par, anlpar;
  234 
  235         mii->mii_media_status = IFM_AVALID;
  236         mii->mii_media_active = IFM_ETHER;
  237 
  238         bmsr = PHY_READ(sc, MII_BMSR) |
  239             PHY_READ(sc, MII_BMSR);
  240         if (bmsr & BMSR_LINK)
  241                 mii->mii_media_status |= IFM_ACTIVE;
  242 
  243         bmcr = PHY_READ(sc, MII_BMCR);
  244         if (bmcr & BMCR_ISO) {
  245                 mii->mii_media_active |= IFM_NONE;
  246                 mii->mii_media_status = 0;
  247                 return;
  248         }
  249 
  250         if (bmcr & BMCR_LOOP)
  251                 mii->mii_media_active |= IFM_LOOP;
  252 
  253         if (bmcr & BMCR_AUTOEN) {
  254                 /*
  255                  * The PAR status bits are only valid of autonegotiation
  256                  * has completed (or it's disabled).
  257                  */
  258                 if ((bmsr & BMSR_ACOMP) == 0) {
  259                         /* Erg, still trying, I guess... */
  260                         mii->mii_media_active |= IFM_NONE;
  261                         return;
  262                 }
  263 
  264                 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
  265                         anlpar = PHY_READ(sc, MII_ANAR) &
  266                             PHY_READ(sc, MII_ANLPAR);
  267                         if (anlpar & ANLPAR_T4)
  268                                 mii->mii_media_active |= IFM_100_T4;
  269                         else if (anlpar & ANLPAR_TX_FD)
  270                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  271                         else if (anlpar & ANLPAR_TX)
  272                                 mii->mii_media_active |= IFM_100_TX;
  273                         else if (anlpar & ANLPAR_10_FD)
  274                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
  275                         else if (anlpar & ANLPAR_10)
  276                                 mii->mii_media_active |= IFM_10_T;
  277                         else
  278                                 mii->mii_media_active |= IFM_NONE;
  279                         return;
  280                 }
  281 
  282                 /*
  283                  * Link partner is not capable of autonegotiation.
  284                  */
  285                 par = PHY_READ(sc, MII_AMPHY_DSCSR);
  286                 if (par & DSCSR_100FDX)
  287                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  288                 else if (par & DSCSR_100HDX)
  289                         mii->mii_media_active |= IFM_100_TX;
  290                 else if (par & DSCSR_10FDX)
  291                         mii->mii_media_active |= IFM_10_T|IFM_HDX;
  292                 else if (par & DSCSR_10HDX)
  293                         mii->mii_media_active |= IFM_10_T;
  294         } else
  295                 mii->mii_media_active = mii_media_from_bmcr(bmcr);
  296 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/amphy.c

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