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: releng/6.0/sys/dev/mii/bmtphy.c 139749 2005-01-06 01:43:34Z imp $");
   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 int
  124 bmtphy_probe(device_t dev)
  125 {
  126         struct  mii_attach_args *ma;
  127         int     rval;
  128 
  129         ma = device_get_ivars(dev);
  130         rval = 0;
  131 
  132         if (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_BROADCOM)
  133                 return (ENXIO);
  134 
  135         switch (MII_MODEL(ma->mii_id2)) {
  136         case MII_MODEL_BROADCOM_3C905B:
  137                 device_set_desc(dev, MII_STR_BROADCOM_3C905B);
  138                 rval = -10;     /* Let exphy take precedence. */
  139                 break;
  140         case MII_MODEL_BROADCOM_3C905C:
  141                 device_set_desc(dev, MII_STR_BROADCOM_3C905C);
  142                 rval = -10;     /* Let exphy take precedence. */
  143                 break;
  144         case MII_MODEL_BROADCOM_BCM5201:
  145                 device_set_desc(dev, MII_STR_BROADCOM_BCM5201);
  146                 break;
  147         case MII_MODEL_BROADCOM_BCM5221:
  148                 device_set_desc(dev, MII_STR_BROADCOM_BCM5221);
  149                 break;
  150         case MII_MODEL_BROADCOM_BCM4401:
  151                 device_set_desc(dev, MII_STR_BROADCOM_BCM4401);
  152                 break;
  153         default:
  154                 return (ENXIO);
  155         }
  156 
  157         return (rval);
  158 }
  159 
  160 static int
  161 bmtphy_attach(device_t dev)
  162 {
  163         struct  mii_softc *sc;
  164         struct  mii_attach_args *ma;
  165         struct  mii_data *mii;
  166 
  167         sc = device_get_softc(dev);
  168         ma = device_get_ivars(dev);
  169         sc->mii_dev = device_get_parent(dev);
  170         mii = device_get_softc(sc->mii_dev);
  171         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  172 
  173         sc->mii_inst = mii->mii_instance;
  174         sc->mii_phy = ma->mii_phyno;
  175         sc->mii_service = bmtphy_service;
  176         sc->mii_pdata = mii;
  177 
  178         mii_phy_reset(sc);
  179 
  180         mii->mii_instance++;
  181 
  182         sc->mii_capabilities =
  183             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  184         device_printf(dev, " ");
  185         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
  186                 printf("no media present");
  187         else
  188                 mii_phy_add_media(sc);
  189 
  190         printf("\n");
  191 
  192         MIIBUS_MEDIAINIT(sc->mii_dev);
  193 
  194         return (0);
  195 }
  196 
  197 static int
  198 bmtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  199 {
  200         struct  ifmedia_entry *ife;
  201         int     reg;
  202 
  203         ife = mii->mii_media.ifm_cur;
  204 
  205         switch (cmd) {
  206         case MII_POLLSTAT:
  207                 /*
  208                  * If we're not polling our PHY instance, just return.
  209                  */
  210                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  211                         return (0);
  212                 break;
  213 
  214         case MII_MEDIACHG:
  215                 /*
  216                  * If the media indicates a different PHY instance,
  217                  * isolate ourselves.
  218                  */
  219                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  220                         reg = PHY_READ(sc, MII_BMCR);
  221                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  222                         return (0);
  223                 }
  224 
  225                 /*
  226                  * If the interface is not up, don't do anything.
  227                  */
  228                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  229                         break;
  230 
  231                 mii_phy_setmedia(sc);
  232                 break;
  233 
  234         case MII_TICK:
  235                 /*
  236                  * If we're not currently selected, just return.
  237                  */
  238                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  239                         return (0);
  240                 if (mii_phy_tick(sc) == EJUSTRETURN)
  241                         return (0);
  242                 break;
  243         }
  244 
  245         /* Update the media status. */
  246         bmtphy_status(sc);
  247 
  248         /* Callback if something changed. */
  249         mii_phy_update(sc, cmd);
  250 
  251         return (0);
  252 }
  253 
  254 static void
  255 bmtphy_status(struct mii_softc *sc)
  256 {
  257         struct  mii_data *mii;
  258         struct  ifmedia_entry *ife;
  259         int     bmsr, bmcr, aux_csr;
  260 
  261         mii = sc->mii_pdata;
  262         ife = mii->mii_media.ifm_cur;
  263 
  264         mii->mii_media_status = IFM_AVALID;
  265         mii->mii_media_active = IFM_ETHER;
  266 
  267         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  268         aux_csr = PHY_READ(sc, MII_BMTPHY_AUX_CSR);
  269 
  270         if (bmsr & BMSR_LINK)
  271                 mii->mii_media_status |= IFM_ACTIVE;
  272 
  273         bmcr = PHY_READ(sc, MII_BMCR);
  274         if (bmcr & BMCR_ISO) {
  275                 mii->mii_media_active |= IFM_NONE;
  276                 mii->mii_media_status = 0;
  277                 return;
  278         }
  279 
  280         if (bmcr & BMCR_LOOP)
  281                 mii->mii_media_active |= IFM_LOOP;
  282 
  283         if (bmcr & BMCR_AUTOEN) {
  284                 /*
  285                  * The media status bits are only valid if autonegotiation
  286                  * has completed (or it's disabled).
  287                  */
  288                 if ((bmsr & BMSR_ACOMP) == 0) {
  289                         /* Erg, still trying, I guess... */
  290                         mii->mii_media_active |= IFM_NONE;
  291                         return;
  292                 }
  293 
  294                 if (aux_csr & AUX_CSR_SPEED)
  295                         mii->mii_media_active |= IFM_100_TX;
  296                 else
  297                         mii->mii_media_active |= IFM_10_T;
  298                 if (aux_csr & AUX_CSR_FDX)
  299                         mii->mii_media_active |= IFM_FDX;
  300         } else
  301                 mii->mii_media_active = ife->ifm_media;
  302 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/bmtphy.c

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sys/dev/mii/bmtphy.c
