pnaphy.c

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    1 /*-
    2  * Copyright (c) 2000 Berkeley Software Design, Inc.
    3  * Copyright (c) 1997, 1998, 1999, 2000
    4  *      Bill Paul <wpaul@osd.bsdi.com>.  All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. All advertising materials mentioning features or use of this software
   15  *    must display the following acknowledgement:
   16  *      This product includes software developed by Bill Paul.
   17  * 4. Neither the name of the author nor the names of any co-contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
   25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   31  * THE POSSIBILITY OF SUCH DAMAGE.
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 __FBSDID("$FreeBSD: releng/6.0/sys/dev/mii/pnaphy.c 139749 2005-01-06 01:43:34Z imp $");
   36 
   37 /*
   38  * driver for homePNA PHYs
   39  * This is really just a stub that allows us to identify homePNA-based
   40  * transceicers and display the link status. MII-based homePNA PHYs
   41  * only support one media type and no autonegotiation. If we were
   42  * really clever, we could tweak some of the vendor-specific registers
   43  * to optimize the link.
   44  */
   45 
   46 #include <sys/param.h>
   47 #include <sys/systm.h>
   48 #include <sys/kernel.h>
   49 #include <sys/socket.h>
   50 #include <sys/errno.h>
   51 #include <sys/module.h>
   52 #include <sys/bus.h>
   53 
   54 #include <net/if.h>
   55 #include <net/if_media.h>
   56 
   57 
   58 #include <dev/mii/mii.h>
   59 #include <dev/mii/miivar.h>
   60 #include "miidevs.h"
   61 
   62 #include "miibus_if.h"
   63 
   64 static int pnaphy_probe(device_t);
   65 static int pnaphy_attach(device_t);
   66 
   67 static device_method_t pnaphy_methods[] = {
   68         /* device interface */
   69         DEVMETHOD(device_probe,         pnaphy_probe),
   70         DEVMETHOD(device_attach,        pnaphy_attach),
   71         DEVMETHOD(device_detach,        mii_phy_detach),
   72         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   73         { 0, 0 }
   74 };
   75 
   76 static devclass_t pnaphy_devclass;
   77 
   78 static driver_t pnaphy_driver = {
   79         "pnaphy",
   80         pnaphy_methods,
   81         sizeof(struct mii_softc)
   82 };
   83 
   84 DRIVER_MODULE(pnaphy, miibus, pnaphy_driver, pnaphy_devclass, 0, 0);
   85 
   86 static int      pnaphy_service(struct mii_softc *, struct mii_data *,int);
   87 
   88 static int
   89 pnaphy_probe(dev)
   90         device_t                dev;
   91 {
   92 
   93         struct mii_attach_args  *ma;
   94 
   95         ma = device_get_ivars(dev);
   96 
   97         if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_AMD &&
   98             MII_MODEL(ma->mii_id2) == MII_MODEL_AMD_79c978) {
   99                 device_set_desc(dev, MII_STR_AMD_79c978);
  100                 return(0);
  101         }
  102 
  103         return(ENXIO);
  104 }
  105 
  106 static int
  107 pnaphy_attach(dev)
  108         device_t                dev;
  109 {
  110         struct mii_softc *sc;
  111         struct mii_attach_args *ma;
  112         struct mii_data *mii;
  113         const char *sep = "";
  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 = pnaphy_service;
  124         sc->mii_pdata = mii;
  125 
  126         mii->mii_instance++;
  127 
  128         sc->mii_flags |= MIIF_NOISOLATE;
  129 
  130 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  131 #define PRINT(s)        printf("%s%s", sep, s); sep = ", "
  132 
  133         mii_phy_reset(sc);
  134 
  135         sc->mii_capabilities =
  136             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  137         device_printf(dev, " ");
  138         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
  139                 printf("no media present");
  140         else {
  141                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_HPNA_1, 0, sc->mii_inst), 0);
  142                 PRINT("HomePNA");
  143         }
  144         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
  145             BMCR_ISO);
  146 
  147         printf("\n");
  148 
  149 #undef ADD
  150 #undef PRINT
  151 
  152         MIIBUS_MEDIAINIT(sc->mii_dev);
  153 
  154         return(0);
  155 }
  156 
  157 static int
  158 pnaphy_service(sc, mii, cmd)
  159         struct mii_softc *sc;
  160         struct mii_data *mii;
  161         int cmd;
  162 {
  163         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  164         int reg;
  165 
  166         switch (cmd) {
  167         case MII_POLLSTAT:
  168                 /*
  169                  * If we're not polling our PHY instance, just return.
  170                  */
  171                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  172                         return (0);
  173                 break;
  174 
  175         case MII_MEDIACHG:
  176                 /*
  177                  * If the media indicates a different PHY instance,
  178                  * isolate ourselves.
  179                  */
  180                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  181                         reg = PHY_READ(sc, MII_BMCR);
  182                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  183                         return (0);
  184                 }
  185 
  186                 /*
  187                  * If the interface is not up, don't do anything.
  188                  */
  189                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  190                         break;
  191 
  192                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  193                 case IFM_AUTO:
  194                 case IFM_10_T:
  195                 case IFM_100_TX:
  196                 case IFM_100_T4:
  197                         return (EINVAL);
  198                 default:
  199                         /*
  200                          * BMCR data is stored in the ifmedia entry.
  201                          */
  202                         PHY_WRITE(sc, MII_ANAR,
  203                             mii_anar(ife->ifm_media));
  204                         PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
  205                 }
  206                 break;
  207 
  208         case MII_TICK:
  209                 /*
  210                  * If we're not currently selected, just return.
  211                  */
  212                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  213                         return (0);
  214                 if (mii_phy_tick(sc) == EJUSTRETURN)
  215                         return (0);
  216                 break;
  217         }
  218 
  219         /* Update the media status. */
  220         ukphy_status(sc);
  221         if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T)
  222                 mii->mii_media_active = IFM_ETHER|IFM_HPNA_1;
  223 
  224         /* Callback if something changed. */
  225         mii_phy_update(sc, cmd);
  226         return (0);
  227 }

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

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