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 Davicom DM910{1,2} PHYs, which appear
   39  * to be AM79c873 workalikes.
   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         DEVMETHOD_END
   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 const struct mii_phydesc amphys[] = {
   86         MII_PHY_DESC(xxDAVICOM, DM9102),
   87         MII_PHY_DESC(xxDAVICOM, DM9101),
   88         MII_PHY_DESC(yyDAVICOM, DM9101),
   89         MII_PHY_END
   90 };
   91 
   92 static const struct mii_phy_funcs amphy_funcs = {
   93         amphy_service,
   94         amphy_status,
   95         mii_phy_reset
   96 };
   97 
   98 static int
   99 amphy_probe(device_t dev)
  100 {
  101 
  102         return (mii_phy_dev_probe(dev, amphys, BUS_PROBE_DEFAULT));
  103 }
  104 
  105 static int
  106 amphy_attach(device_t dev)
  107 {
  108 
  109         mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &amphy_funcs, 1);
  110         return (0);
  111 }
  112 
  113 static int
  114 amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  115 {
  116 
  117         switch (cmd) {
  118         case MII_POLLSTAT:
  119                 break;
  120 
  121         case MII_MEDIACHG:
  122                 /*
  123                  * If the interface is not up, don't do anything.
  124                  */
  125                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  126                         break;
  127 
  128                 mii_phy_setmedia(sc);
  129                 break;
  130 
  131         case MII_TICK:
  132                 if (mii_phy_tick(sc) == EJUSTRETURN)
  133                         return (0);
  134                 break;
  135         }
  136 
  137         /* Update the media status. */
  138         PHY_STATUS(sc);
  139 
  140         /* Callback if something changed. */
  141         mii_phy_update(sc, cmd);
  142         return (0);
  143 }
  144 
  145 static void
  146 amphy_status(struct mii_softc *sc)
  147 {
  148         struct mii_data *mii = sc->mii_pdata;
  149         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  150         int bmsr, bmcr, par, anlpar;
  151 
  152         mii->mii_media_status = IFM_AVALID;
  153         mii->mii_media_active = IFM_ETHER;
  154 
  155         bmsr = PHY_READ(sc, MII_BMSR) |
  156             PHY_READ(sc, MII_BMSR);
  157         if (bmsr & BMSR_LINK)
  158                 mii->mii_media_status |= IFM_ACTIVE;
  159 
  160         bmcr = PHY_READ(sc, MII_BMCR);
  161         if (bmcr & BMCR_ISO) {
  162                 mii->mii_media_active |= IFM_NONE;
  163                 mii->mii_media_status = 0;
  164                 return;
  165         }
  166 
  167         if (bmcr & BMCR_LOOP)
  168                 mii->mii_media_active |= IFM_LOOP;
  169 
  170         if (bmcr & BMCR_AUTOEN) {
  171                 /*
  172                  * The PAR status bits are only valid if autonegotiation
  173                  * has completed (or it's disabled).
  174                  */
  175                 if ((bmsr & BMSR_ACOMP) == 0) {
  176                         /* Erg, still trying, I guess... */
  177                         mii->mii_media_active |= IFM_NONE;
  178                         return;
  179                 }
  180 
  181                 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
  182                         anlpar = PHY_READ(sc, MII_ANAR) &
  183                             PHY_READ(sc, MII_ANLPAR);
  184                         if (anlpar & ANLPAR_TX_FD)
  185                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  186                         else if (anlpar & ANLPAR_T4)
  187                                 mii->mii_media_active |= IFM_100_T4|IFM_HDX;
  188                         else if (anlpar & ANLPAR_TX)
  189                                 mii->mii_media_active |= IFM_100_TX|IFM_HDX;
  190                         else if (anlpar & ANLPAR_10_FD)
  191                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
  192                         else if (anlpar & ANLPAR_10)
  193                                 mii->mii_media_active |= IFM_10_T|IFM_HDX;
  194                         else
  195                                 mii->mii_media_active |= IFM_NONE;
  196                         return;
  197                 }
  198 
  199                 /*
  200                  * Link partner is not capable of autonegotiation.
  201                  */
  202                 par = PHY_READ(sc, MII_AMPHY_DSCSR);
  203                 if (par & DSCSR_100FDX)
  204                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  205                 else if (par & DSCSR_100HDX)
  206                         mii->mii_media_active |= IFM_100_TX|IFM_HDX;
  207                 else if (par & DSCSR_10FDX)
  208                         mii->mii_media_active |= IFM_10_T|IFM_HDX;
  209                 else if (par & DSCSR_10HDX)
  210                         mii->mii_media_active |= IFM_10_T|IFM_HDX;
  211                 if ((mii->mii_media_active & IFM_FDX) != 0)
  212                         mii->mii_media_active |= mii_phy_flowstatus(sc);
  213         } else
  214                 mii->mii_media_active = ife->ifm_media;
  215 }

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

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sys/dev/mii/amphy.c