amphy.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-4-Clause
    3  *
    4  * Copyright (c) 1997, 1998, 1999
    5  *      Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *      This product includes software developed by Bill Paul.
   18  * 4. Neither the name of the author nor the names of any co-contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
   26  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   32  * THE POSSIBILITY OF SUCH DAMAGE.
   33  */
   34 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD$");
   37 
   38 /*
   39  * driver for AMD AM79c873 PHYs
   40  * This driver also works for Davicom DM910{1,2} PHYs, which appear
   41  * to be AM79c873 workalikes.
   42  */
   43 
   44 #include <sys/param.h>
   45 #include <sys/systm.h>
   46 #include <sys/kernel.h>
   47 #include <sys/module.h>
   48 #include <sys/socket.h>
   49 #include <sys/bus.h>
   50 
   51 #include <net/if.h>
   52 #include <net/if_media.h>
   53 
   54 #include <dev/mii/mii.h>
   55 #include <dev/mii/miivar.h>
   56 #include "miidevs.h"
   57 
   58 #include <dev/mii/amphyreg.h>
   59 
   60 #include "miibus_if.h"
   61 
   62 static int amphy_probe(device_t);
   63 static int amphy_attach(device_t);
   64 
   65 static device_method_t amphy_methods[] = {
   66         /* device interface */
   67         DEVMETHOD(device_probe,         amphy_probe),
   68         DEVMETHOD(device_attach,        amphy_attach),
   69         DEVMETHOD(device_detach,        mii_phy_detach),
   70         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   71         DEVMETHOD_END
   72 };
   73 
   74 static devclass_t amphy_devclass;
   75 
   76 static driver_t amphy_driver = {
   77         "amphy",
   78         amphy_methods,
   79         sizeof(struct mii_softc)
   80 };
   81 
   82 DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0);
   83 
   84 static int      amphy_service(struct mii_softc *, struct mii_data *, int);
   85 static void     amphy_status(struct mii_softc *);
   86 
   87 static const struct mii_phydesc amphys[] = {
   88         MII_PHY_DESC(xxDAVICOM, DM9102),
   89         MII_PHY_DESC(xxDAVICOM, DM9101),
   90         MII_PHY_DESC(yyDAVICOM, DM9101),
   91         MII_PHY_END
   92 };
   93 
   94 static const struct mii_phy_funcs amphy_funcs = {
   95         amphy_service,
   96         amphy_status,
   97         mii_phy_reset
   98 };
   99 
  100 static int
  101 amphy_probe(device_t dev)
  102 {
  103 
  104         return (mii_phy_dev_probe(dev, amphys, BUS_PROBE_DEFAULT));
  105 }
  106 
  107 static int
  108 amphy_attach(device_t dev)
  109 {
  110 
  111         mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &amphy_funcs, 1);
  112         return (0);
  113 }
  114 
  115 static int
  116 amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  117 {
  118 
  119         switch (cmd) {
  120         case MII_POLLSTAT:
  121                 break;
  122 
  123         case MII_MEDIACHG:
  124                 mii_phy_setmedia(sc);
  125                 break;
  126 
  127         case MII_TICK:
  128                 if (mii_phy_tick(sc) == EJUSTRETURN)
  129                         return (0);
  130                 break;
  131         }
  132 
  133         /* Update the media status. */
  134         PHY_STATUS(sc);
  135 
  136         /* Callback if something changed. */
  137         mii_phy_update(sc, cmd);
  138         return (0);
  139 }
  140 
  141 static void
  142 amphy_status(struct mii_softc *sc)
  143 {
  144         struct mii_data *mii = sc->mii_pdata;
  145         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  146         int bmsr, bmcr, par, anlpar;
  147 
  148         mii->mii_media_status = IFM_AVALID;
  149         mii->mii_media_active = IFM_ETHER;
  150 
  151         bmsr = PHY_READ(sc, MII_BMSR) |
  152             PHY_READ(sc, MII_BMSR);
  153         if (bmsr & BMSR_LINK)
  154                 mii->mii_media_status |= IFM_ACTIVE;
  155 
  156         bmcr = PHY_READ(sc, MII_BMCR);
  157         if (bmcr & BMCR_ISO) {
  158                 mii->mii_media_active |= IFM_NONE;
  159                 mii->mii_media_status = 0;
  160                 return;
  161         }
  162 
  163         if (bmcr & BMCR_LOOP)
  164                 mii->mii_media_active |= IFM_LOOP;
  165 
  166         if (bmcr & BMCR_AUTOEN) {
  167                 /*
  168                  * The PAR status bits are only valid if autonegotiation
  169                  * has completed (or it's disabled).
  170                  */
  171                 if ((bmsr & BMSR_ACOMP) == 0) {
  172                         /* Erg, still trying, I guess... */
  173                         mii->mii_media_active |= IFM_NONE;
  174                         return;
  175                 }
  176 
  177                 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
  178                         anlpar = PHY_READ(sc, MII_ANAR) &
  179                             PHY_READ(sc, MII_ANLPAR);
  180                         if (anlpar & ANLPAR_TX_FD)
  181                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  182                         else if (anlpar & ANLPAR_T4)
  183                                 mii->mii_media_active |= IFM_100_T4|IFM_HDX;
  184                         else if (anlpar & ANLPAR_TX)
  185                                 mii->mii_media_active |= IFM_100_TX|IFM_HDX;
  186                         else if (anlpar & ANLPAR_10_FD)
  187                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
  188                         else if (anlpar & ANLPAR_10)
  189                                 mii->mii_media_active |= IFM_10_T|IFM_HDX;
  190                         else
  191                                 mii->mii_media_active |= IFM_NONE;
  192                         return;
  193                 }
  194 
  195                 /*
  196                  * Link partner is not capable of autonegotiation.
  197                  */
  198                 par = PHY_READ(sc, MII_AMPHY_DSCSR);
  199                 if (par & DSCSR_100FDX)
  200                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  201                 else if (par & DSCSR_100HDX)
  202                         mii->mii_media_active |= IFM_100_TX|IFM_HDX;
  203                 else if (par & DSCSR_10FDX)
  204                         mii->mii_media_active |= IFM_10_T|IFM_HDX;
  205                 else if (par & DSCSR_10HDX)
  206                         mii->mii_media_active |= IFM_10_T|IFM_HDX;
  207                 if ((mii->mii_media_active & IFM_FDX) != 0)
  208                         mii->mii_media_active |= mii_phy_flowstatus(sc);
  209         } else
  210                 mii->mii_media_active = ife->ifm_media;
  211 }

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

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sys/dev/mii/amphy.c