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  */
   69 
   70 #include <sys/cdefs.h>
   71 __FBSDID("$FreeBSD$");
   72 
   73 /*
   74  * Driver for the Broadcom BCM5201/BCM5202 "Mini-Theta" PHYs.  This also
   75  * drives the PHY on the 3Com 3c905C.  The 3c905C's PHY is described in
   76  * the 3c905C data sheet.
   77  */
   78 
   79 #include <sys/param.h>
   80 #include <sys/systm.h>
   81 #include <sys/kernel.h>
   82 #include <sys/module.h>
   83 #include <sys/socket.h>
   84 #include <sys/bus.h>
   85 
   86 #include <net/if.h>
   87 #include <net/if_media.h>
   88 
   89 #include <dev/mii/mii.h>
   90 #include <dev/mii/miivar.h>
   91 #include "miidevs.h"
   92 
   93 #include <dev/mii/bmtphyreg.h>
   94 
   95 #include "miibus_if.h"
   96 
   97 static int      bmtphy_probe(device_t);
   98 static int      bmtphy_attach(device_t);
   99 
  100 static device_method_t bmtphy_methods[] = {
  101         /* Device interface */
  102         DEVMETHOD(device_probe,         bmtphy_probe),
  103         DEVMETHOD(device_attach,        bmtphy_attach),
  104         DEVMETHOD(device_detach,        mii_phy_detach),
  105         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  106 
  107         { 0, 0 }
  108 };
  109 
  110 static devclass_t       bmtphy_devclass;
  111 
  112 static driver_t bmtphy_driver = {
  113         "bmtphy",
  114         bmtphy_methods,
  115         sizeof(struct mii_softc)
  116 };
  117 
  118 DRIVER_MODULE(bmtphy, miibus, bmtphy_driver, bmtphy_devclass, 0, 0);
  119 
  120 static int      bmtphy_service(struct mii_softc *, struct mii_data *, int);
  121 static void     bmtphy_status(struct mii_softc *);
  122 
  123 static const struct mii_phydesc bmtphys_dp[] = {
  124         MII_PHY_DESC(BROADCOM, BCM4401),
  125         MII_PHY_DESC(BROADCOM, BCM5201),
  126         MII_PHY_DESC(BROADCOM, BCM5221),
  127         MII_PHY_END
  128 };
  129 
  130 static const struct mii_phydesc bmtphys_lp[] = {
  131         MII_PHY_DESC(BROADCOM, 3C905B),
  132         MII_PHY_DESC(BROADCOM, 3C905C),
  133         MII_PHY_END
  134 };
  135 
  136 static int
  137 bmtphy_probe(device_t dev)
  138 {
  139         int     rval;
  140 
  141         /* Let exphy(4) take precedence for these. */
  142         rval = mii_phy_dev_probe(dev, bmtphys_lp, BUS_PROBE_LOW_PRIORITY);
  143         if (rval <= 0)
  144                 return (rval);
  145 
  146         return (mii_phy_dev_probe(dev, bmtphys_dp, BUS_PROBE_DEFAULT));
  147 }
  148 
  149 static int
  150 bmtphy_attach(device_t dev)
  151 {
  152         struct  mii_softc *sc;
  153         struct  mii_attach_args *ma;
  154         struct  mii_data *mii;
  155 
  156         sc = device_get_softc(dev);
  157         ma = device_get_ivars(dev);
  158         sc->mii_dev = device_get_parent(dev);
  159         mii = device_get_softc(sc->mii_dev);
  160         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  161 
  162         sc->mii_inst = mii->mii_instance;
  163         sc->mii_phy = ma->mii_phyno;
  164         sc->mii_service = bmtphy_service;
  165         sc->mii_pdata = mii;
  166 
  167         mii_phy_reset(sc);
  168 
  169         mii->mii_instance++;
  170 
  171         sc->mii_capabilities =
  172             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  173         device_printf(dev, " ");
  174         mii_phy_add_media(sc);
  175         printf("\n");
  176 
  177         MIIBUS_MEDIAINIT(sc->mii_dev);
  178 
  179         return (0);
  180 }
  181 
  182 static int
  183 bmtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  184 {
  185         struct  ifmedia_entry *ife;
  186         int     reg;
  187 
  188         ife = mii->mii_media.ifm_cur;
  189 
  190         switch (cmd) {
  191         case MII_POLLSTAT:
  192                 /*
  193                  * If we're not polling our PHY instance, just return.
  194                  */
  195                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  196                         return (0);
  197                 break;
  198 
  199         case MII_MEDIACHG:
  200                 /*
  201                  * If the media indicates a different PHY instance,
  202                  * isolate ourselves.
  203                  */
  204                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  205                         reg = PHY_READ(sc, MII_BMCR);
  206                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  207                         return (0);
  208                 }
  209 
  210                 /*
  211                  * If the interface is not up, don't do anything.
  212                  */
  213                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  214                         break;
  215 
  216                 mii_phy_setmedia(sc);
  217                 break;
  218 
  219         case MII_TICK:
  220                 /*
  221                  * If we're not currently selected, just return.
  222                  */
  223                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  224                         return (0);
  225                 if (mii_phy_tick(sc) == EJUSTRETURN)
  226                         return (0);
  227                 break;
  228         }
  229 
  230         /* Update the media status. */
  231         bmtphy_status(sc);
  232 
  233         /* Callback if something changed. */
  234         mii_phy_update(sc, cmd);
  235 
  236         return (0);
  237 }
  238 
  239 static void
  240 bmtphy_status(struct mii_softc *sc)
  241 {
  242         struct  mii_data *mii;
  243         struct  ifmedia_entry *ife;
  244         int     bmsr, bmcr, aux_csr;
  245 
  246         mii = sc->mii_pdata;
  247         ife = mii->mii_media.ifm_cur;
  248 
  249         mii->mii_media_status = IFM_AVALID;
  250         mii->mii_media_active = IFM_ETHER;
  251 
  252         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  253         aux_csr = PHY_READ(sc, MII_BMTPHY_AUX_CSR);
  254 
  255         if (bmsr & BMSR_LINK)
  256                 mii->mii_media_status |= IFM_ACTIVE;
  257 
  258         bmcr = PHY_READ(sc, MII_BMCR);
  259         if (bmcr & BMCR_ISO) {
  260                 mii->mii_media_active |= IFM_NONE;
  261                 mii->mii_media_status = 0;
  262                 return;
  263         }
  264 
  265         if (bmcr & BMCR_LOOP)
  266                 mii->mii_media_active |= IFM_LOOP;
  267 
  268         if (bmcr & BMCR_AUTOEN) {
  269                 /*
  270                  * The media status bits are only valid if autonegotiation
  271                  * has completed (or it's disabled).
  272                  */
  273                 if ((bmsr & BMSR_ACOMP) == 0) {
  274                         /* Erg, still trying, I guess... */
  275                         mii->mii_media_active |= IFM_NONE;
  276                         return;
  277                 }
  278 
  279                 if (aux_csr & AUX_CSR_SPEED)
  280                         mii->mii_media_active |= IFM_100_TX;
  281                 else
  282                         mii->mii_media_active |= IFM_10_T;
  283                 if (aux_csr & AUX_CSR_FDX)
  284                         mii->mii_media_active |= IFM_FDX;
  285         } else
  286                 mii->mii_media_active = ife->ifm_media;
  287 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/bmtphy.c

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