The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*
    2  * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
    3  * All rights reserved.
    4  *
    5  * This code is derived from software contributed to The NetBSD Foundation
    6  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
    7  * NASA Ames Research Center.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. All advertising materials mentioning features or use of this software
   18  *    must display the following acknowledgement:
   19  *      This product includes software developed by the NetBSD
   20  *      Foundation, Inc. and its contributors.
   21  * 4. Neither the name of The NetBSD Foundation nor the names of its
   22  *    contributors may be used to endorse or promote products derived
   23  *    from this software without specific prior written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   26  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   35  * POSSIBILITY OF SUCH DAMAGE.
   36  */
   37 
   38 /*
   39  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
   40  *
   41  * Redistribution and use in source and binary forms, with or without
   42  * modification, are permitted provided that the following conditions
   43  * are met:
   44  * 1. Redistributions of source code must retain the above copyright
   45  *    notice, this list of conditions and the following disclaimer.
   46  * 2. Redistributions in binary form must reproduce the above copyright
   47  *    notice, this list of conditions and the following disclaimer in the
   48  *    documentation and/or other materials provided with the distribution.
   49  * 3. All advertising materials mentioning features or use of this software
   50  *    must display the following acknowledgement:
   51  *      This product includes software developed by Manuel Bouyer.
   52  * 4. The name of the author may not be used to endorse or promote products
   53  *    derived from this software without specific prior written permission.
   54  *
   55  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   56  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   57  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   58  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   59  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   60  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   61  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   62  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   63  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   64  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   65  *
   66  *      from: NetBSD: bmtphy.c,v 1.8 2002/07/03 06:25:50 simonb Exp
   67  *
   68  * $FreeBSD: releng/5.0/sys/dev/mii/bmtphy.c 106107 2002-10-29 00:20:47Z semenu $
   69  */
   70 
   71 /*
   72  * Driver for the Broadcom BCM5201/BCM5202 "Mini-Theta" PHYs.  This also
   73  * drives the PHY on the 3Com 3c905C.  The 3c905C's PHY is described in
   74  * the 3c905C data sheet.
   75  */
   76 
   77 #include <sys/param.h>
   78 #include <sys/systm.h>
   79 #include <sys/kernel.h>
   80 #include <sys/socket.h>
   81 #include <sys/bus.h>
   82 
   83 #include <net/if.h>
   84 #include <net/if_media.h>
   85 
   86 #include <dev/mii/mii.h>
   87 #include <dev/mii/miivar.h>
   88 #include <dev/mii/miidevs.h>
   89 
   90 #include <dev/mii/bmtphyreg.h>
   91 
   92 #include "miibus_if.h"
   93 
   94 static int      bmtphy_probe(device_t);
   95 static int      bmtphy_attach(device_t);
   96 
   97 static device_method_t bmtphy_methods[] = {
   98         /* Device interface */
   99         DEVMETHOD(device_probe,         bmtphy_probe),
  100         DEVMETHOD(device_attach,        bmtphy_attach),
  101         DEVMETHOD(device_detach,        mii_phy_detach),
  102         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  103 
  104         { 0, 0 }
  105 };
  106 
  107 static devclass_t       bmtphy_devclass;
  108 
  109 static driver_t bmtphy_driver = {
  110         "bmtphy",
  111         bmtphy_methods,
  112         sizeof(struct mii_softc)
  113 };
  114 
  115 DRIVER_MODULE(bmtphy, miibus, bmtphy_driver, bmtphy_devclass, 0, 0);
  116 
  117 static int      bmtphy_service(struct mii_softc *, struct mii_data *, int);
  118 static void     bmtphy_status(struct mii_softc *);
  119 
  120 static int
  121 bmtphy_probe(device_t dev)
  122 {
  123         struct  mii_attach_args *ma;
  124         int     rval;
  125 
  126         ma = device_get_ivars(dev);
  127         rval = 0;
  128 
  129         if (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_BROADCOM)
  130                 return (ENXIO);
  131 
  132         switch (MII_MODEL(ma->mii_id2)) {
  133         case MII_MODEL_BROADCOM_3C905B:
  134                 device_set_desc(dev, MII_STR_BROADCOM_3C905B);
  135                 rval = -10;     /* Let exphy take precedence. */
  136                 break;
  137         case MII_MODEL_BROADCOM_3C905C:
  138                 device_set_desc(dev, MII_STR_BROADCOM_3C905C);
  139                 rval = -10;     /* Let exphy take precedence. */
  140                 break;
  141         case MII_MODEL_BROADCOM_BCM5201:
  142                 device_set_desc(dev, MII_STR_BROADCOM_BCM5201);
  143                 break;
  144         case MII_MODEL_BROADCOM_BCM5221:
  145                 device_set_desc(dev, MII_STR_BROADCOM_BCM5221);
  146                 break;
  147         default:
  148                 return (ENXIO);
  149                 break;
  150         }
  151 
  152         return (rval);
  153 }
  154 
  155 static int
  156 bmtphy_attach(device_t dev)
  157 {
  158         struct  mii_softc *sc;
  159         struct  mii_attach_args *ma;
  160         struct  mii_data *mii;
  161 
  162         sc = device_get_softc(dev);
  163         ma = device_get_ivars(dev);
  164         sc->mii_dev = device_get_parent(dev);
  165         mii = device_get_softc(sc->mii_dev);
  166         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  167 
  168         sc->mii_inst = mii->mii_instance;
  169         sc->mii_phy = ma->mii_phyno;
  170         sc->mii_service = bmtphy_service;
  171         sc->mii_pdata = mii;
  172 
  173         mii_phy_reset(sc);
  174 
  175         mii->mii_instance++;
  176 
  177         sc->mii_capabilities =
  178             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  179         device_printf(dev, " ");
  180         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
  181                 printf("no media present");
  182         else
  183                 mii_phy_add_media(sc);
  184 
  185         printf("\n");
  186 
  187         MIIBUS_MEDIAINIT(sc->mii_dev);
  188 
  189         return (0);
  190 }
  191 
  192 static int
  193 bmtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  194 {
  195         struct  ifmedia_entry *ife;
  196         int     reg;
  197 
  198         ife = mii->mii_media.ifm_cur;
  199 
  200         switch (cmd) {
  201         case MII_POLLSTAT:
  202                 /*
  203                  * If we're not polling our PHY instance, just return.
  204                  */
  205                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  206                         return (0);
  207                 break;
  208 
  209         case MII_MEDIACHG:
  210                 /*
  211                  * If the media indicates a different PHY instance,
  212                  * isolate ourselves.
  213                  */
  214                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  215                         reg = PHY_READ(sc, MII_BMCR);
  216                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  217                         return (0);
  218                 }
  219 
  220                 /*
  221                  * If the interface is not up, don't do anything.
  222                  */
  223                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  224                         break;
  225 
  226                 mii_phy_setmedia(sc);
  227                 break;
  228 
  229         case MII_TICK:
  230                 /*
  231                  * If we're not currently selected, just return.
  232                  */
  233                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  234                         return (0);
  235                 if (mii_phy_tick(sc) == EJUSTRETURN)
  236                         return (0);
  237                 break;
  238         }
  239 
  240         /* Update the media status. */
  241         bmtphy_status(sc);
  242 
  243         /* Callback if something changed. */
  244         mii_phy_update(sc, cmd);
  245 
  246         return (0);
  247 }
  248 
  249 static void
  250 bmtphy_status(struct mii_softc *sc)
  251 {
  252         struct  mii_data *mii;
  253         struct  ifmedia_entry *ife;
  254         int     bmsr, bmcr, aux_csr;
  255 
  256         mii = sc->mii_pdata;
  257         ife = mii->mii_media.ifm_cur;
  258 
  259         mii->mii_media_status = IFM_AVALID;
  260         mii->mii_media_active = IFM_ETHER;
  261 
  262         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  263         aux_csr = PHY_READ(sc, MII_BMTPHY_AUX_CSR);
  264 
  265         if (bmsr & BMSR_LINK)
  266                 mii->mii_media_status |= IFM_ACTIVE;
  267 
  268         bmcr = PHY_READ(sc, MII_BMCR);
  269         if (bmcr & BMCR_ISO) {
  270                 mii->mii_media_active |= IFM_NONE;
  271                 mii->mii_media_status = 0;
  272                 return;
  273         }
  274 
  275         if (bmcr & BMCR_LOOP)
  276                 mii->mii_media_active |= IFM_LOOP;
  277 
  278         if (bmcr & BMCR_AUTOEN) {
  279                 /*
  280                  * The media status bits are only valid if autonegotiation
  281                  * has completed (or it's disabled).
  282                  */
  283                 if ((bmsr & BMSR_ACOMP) == 0) {
  284                         /* Erg, still trying, I guess... */
  285                         mii->mii_media_active |= IFM_NONE;
  286                         return;
  287                 }
  288 
  289                 if (aux_csr & AUX_CSR_SPEED)
  290                         mii->mii_media_active |= IFM_100_TX;
  291                 else
  292                         mii->mii_media_active |= IFM_10_T;
  293                 if (aux_csr & AUX_CSR_FDX)
  294                         mii->mii_media_active |= IFM_FDX;
  295         } else
  296                 mii->mii_media_active = ife->ifm_media;
  297 }

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