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         { 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 const struct mii_phydesc amphys[] = {
   86         MII_PHY_DESC(DAVICOM, DM9102),
   87         MII_PHY_DESC(xxAMD, 79C873),
   88         MII_PHY_DESC(xxDAVICOM, DM9101),
   89         MII_PHY_END
   90 };
   91 
   92 static int
   93 amphy_probe(device_t dev)
   94 {
   95 
   96         return (mii_phy_dev_probe(dev, amphys, BUS_PROBE_DEFAULT));
   97 }
   98 
   99 static int
  100 amphy_attach(device_t dev)
  101 {
  102         struct mii_softc *sc;
  103         struct mii_attach_args *ma;
  104         struct mii_data *mii;
  105 
  106         sc = device_get_softc(dev);
  107         ma = device_get_ivars(dev);
  108         sc->mii_dev = device_get_parent(dev);
  109         mii = device_get_softc(sc->mii_dev);
  110         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  111 
  112         sc->mii_inst = mii->mii_instance;
  113         sc->mii_phy = ma->mii_phyno;
  114         sc->mii_service = amphy_service;
  115         sc->mii_pdata = mii;
  116 
  117         mii->mii_instance++;
  118 
  119 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  120 
  121 #if 0
  122         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
  123             MII_MEDIA_100_TX);
  124 #endif
  125 
  126         mii_phy_reset(sc);
  127 
  128         sc->mii_capabilities =
  129             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  130         device_printf(dev, " ");
  131         mii_phy_add_media(sc);
  132         printf("\n");
  133 #undef ADD
  134         MIIBUS_MEDIAINIT(sc->mii_dev);
  135         return (0);
  136 }
  137 
  138 static int
  139 amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  140 {
  141         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  142         int reg;
  143 
  144         switch (cmd) {
  145         case MII_POLLSTAT:
  146                 /*
  147                  * If we're not polling our PHY instance, just return.
  148                  */
  149                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  150                         return (0);
  151                 break;
  152 
  153         case MII_MEDIACHG:
  154                 /*
  155                  * If the media indicates a different PHY instance,
  156                  * isolate ourselves.
  157                  */
  158                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  159                         reg = PHY_READ(sc, MII_BMCR);
  160                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  161                         return (0);
  162                 }
  163 
  164                 /*
  165                  * If the interface is not up, don't do anything.
  166                  */
  167                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  168                         break;
  169 
  170                 mii_phy_setmedia(sc);
  171                 break;
  172 
  173         case MII_TICK:
  174                 /*
  175                  * If we're not currently selected, just return.
  176                  */
  177                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  178                         return (0);
  179                 if (mii_phy_tick(sc) == EJUSTRETURN)
  180                         return (0);
  181                 break;
  182         }
  183 
  184         /* Update the media status. */
  185         amphy_status(sc);
  186 
  187         /* Callback if something changed. */
  188         mii_phy_update(sc, cmd);
  189         return (0);
  190 }
  191 
  192 static void
  193 amphy_status(struct mii_softc *sc)
  194 {
  195         struct mii_data *mii = sc->mii_pdata;
  196         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  197         int bmsr, bmcr, par, anlpar;
  198 
  199         mii->mii_media_status = IFM_AVALID;
  200         mii->mii_media_active = IFM_ETHER;
  201 
  202         bmsr = PHY_READ(sc, MII_BMSR) |
  203             PHY_READ(sc, MII_BMSR);
  204         if (bmsr & BMSR_LINK)
  205                 mii->mii_media_status |= IFM_ACTIVE;
  206 
  207         bmcr = PHY_READ(sc, MII_BMCR);
  208         if (bmcr & BMCR_ISO) {
  209                 mii->mii_media_active |= IFM_NONE;
  210                 mii->mii_media_status = 0;
  211                 return;
  212         }
  213 
  214         if (bmcr & BMCR_LOOP)
  215                 mii->mii_media_active |= IFM_LOOP;
  216 
  217         if (bmcr & BMCR_AUTOEN) {
  218                 /*
  219                  * The PAR status bits are only valid of autonegotiation
  220                  * has completed (or it's disabled).
  221                  */
  222                 if ((bmsr & BMSR_ACOMP) == 0) {
  223                         /* Erg, still trying, I guess... */
  224                         mii->mii_media_active |= IFM_NONE;
  225                         return;
  226                 }
  227 
  228                 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
  229                         anlpar = PHY_READ(sc, MII_ANAR) &
  230                             PHY_READ(sc, MII_ANLPAR);
  231                         if (anlpar & ANLPAR_T4)
  232                                 mii->mii_media_active |= IFM_100_T4;
  233                         else if (anlpar & ANLPAR_TX_FD)
  234                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  235                         else if (anlpar & ANLPAR_TX)
  236                                 mii->mii_media_active |= IFM_100_TX;
  237                         else if (anlpar & ANLPAR_10_FD)
  238                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
  239                         else if (anlpar & ANLPAR_10)
  240                                 mii->mii_media_active |= IFM_10_T;
  241                         else
  242                                 mii->mii_media_active |= IFM_NONE;
  243                         return;
  244                 }
  245 
  246                 /*
  247                  * Link partner is not capable of autonegotiation.
  248                  */
  249                 par = PHY_READ(sc, MII_AMPHY_DSCSR);
  250                 if (par & DSCSR_100FDX)
  251                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  252                 else if (par & DSCSR_100HDX)
  253                         mii->mii_media_active |= IFM_100_TX;
  254                 else if (par & DSCSR_10FDX)
  255                         mii->mii_media_active |= IFM_10_T|IFM_HDX;
  256                 else if (par & DSCSR_10HDX)
  257                         mii->mii_media_active |= IFM_10_T;
  258         } else
  259                 mii->mii_media_active = ife->ifm_media;
  260 }

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

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sys/dev/mii/amphy.c