The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/nsphy.c

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    1 /*      $NetBSD: nsphy.c,v 1.18 1999/07/14 23:57:36 thorpej Exp $       */
    2 
    3 /*-
    4  * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
    9  * NASA Ames Research Center.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. All advertising materials mentioning features or use of this software
   20  *    must display the following acknowledgement:
   21  *      This product includes software developed by the NetBSD
   22  *      Foundation, Inc. and its contributors.
   23  * 4. Neither the name of The NetBSD Foundation nor the names of its
   24  *    contributors may be used to endorse or promote products derived
   25  *    from this software without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   37  * POSSIBILITY OF SUCH DAMAGE.
   38  */
   39 
   40 /*
   41  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
   42  *
   43  * Redistribution and use in source and binary forms, with or without
   44  * modification, are permitted provided that the following conditions
   45  * are met:
   46  * 1. Redistributions of source code must retain the above copyright
   47  *    notice, this list of conditions and the following disclaimer.
   48  * 2. Redistributions in binary form must reproduce the above copyright
   49  *    notice, this list of conditions and the following disclaimer in the
   50  *    documentation and/or other materials provided with the distribution.
   51  * 3. All advertising materials mentioning features or use of this software
   52  *    must display the following acknowledgement:
   53  *      This product includes software developed by Manuel Bouyer.
   54  * 4. The name of the author may not be used to endorse or promote products
   55  *    derived from this software without specific prior written permission.
   56  *
   57  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   58  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   59  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   60  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   61  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   62  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   63  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   64  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   65  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   66  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   67  */
   68 
   69 /*
   70  * driver for National Semiconductor's DP83840A ethernet 10/100 PHY
   71  * Data Sheet available from www.national.com
   72  */
   73 
   74 #include <sys/param.h>
   75 #include <sys/systm.h>
   76 #include <sys/kernel.h>
   77 #include <sys/socket.h>
   78 #include <sys/errno.h>
   79 #include <sys/module.h>
   80 #include <sys/bus.h>
   81 
   82 #include <net/if.h>
   83 #include <net/if_media.h>
   84 
   85 #include <dev/mii/mii.h>
   86 #include <dev/mii/miivar.h>
   87 #include <dev/mii/miidevs.h>
   88 
   89 #include <dev/mii/nsphyreg.h>
   90 
   91 #include "miibus_if.h"
   92 
   93 #if !defined(lint)
   94 static const char rcsid[] =
   95   "$FreeBSD: releng/5.0/sys/dev/mii/nsphy.c 105135 2002-10-14 22:31:52Z alfred $";
   96 #endif
   97 
   98 static int nsphy_probe(device_t);
   99 static int nsphy_attach(device_t);
  100 
  101 static device_method_t nsphy_methods[] = {
  102         /* device interface */
  103         DEVMETHOD(device_probe,         nsphy_probe),
  104         DEVMETHOD(device_attach,        nsphy_attach),
  105         DEVMETHOD(device_detach,        mii_phy_detach),
  106         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  107         { 0, 0 }
  108 };
  109 
  110 static devclass_t nsphy_devclass;
  111 
  112 static driver_t nsphy_driver = {
  113         "nsphy",
  114         nsphy_methods,
  115         sizeof(struct mii_softc)
  116 };
  117 
  118 DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0);
  119 
  120 static int      nsphy_service(struct mii_softc *, struct mii_data *, int);
  121 static void     nsphy_status(struct mii_softc *);
  122 
  123 static int
  124 nsphy_probe(dev)
  125         device_t                dev;
  126 {
  127         struct mii_attach_args *ma;
  128 
  129         ma = device_get_ivars(dev);
  130 
  131         if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI &&
  132             MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) {
  133                 device_set_desc(dev, MII_STR_NATSEMI_DP83840);
  134         } else 
  135                 return (ENXIO);
  136 
  137         return (0);
  138 }
  139 
  140 static int
  141 nsphy_attach(dev)
  142         device_t                dev;
  143 {
  144         struct mii_softc *sc;
  145         struct mii_attach_args *ma;
  146         struct mii_data *mii;
  147 
  148         sc = device_get_softc(dev);
  149         ma = device_get_ivars(dev);
  150         sc->mii_dev = device_get_parent(dev);
  151         mii = device_get_softc(sc->mii_dev);
  152         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  153 
  154         sc->mii_inst = mii->mii_instance;
  155         sc->mii_phy = ma->mii_phyno;
  156         sc->mii_service = nsphy_service;
  157         sc->mii_pdata = mii;
  158 
  159 #ifdef foo
  160         /*
  161          * i82557 wedges if all of its PHYs are isolated!
  162          */
  163         if (strcmp(device_get_name(device_get_parent(sc->mii_dev)),
  164             "fxp") == 0 && mii->mii_instance == 0)
  165 #endif
  166 
  167         sc->mii_flags |= MIIF_NOISOLATE;
  168         mii->mii_instance++;
  169 
  170 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  171 
  172 #if 0
  173         /* Can't do this on the i82557! */
  174         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
  175             BMCR_ISO);
  176 #endif
  177         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
  178             BMCR_LOOP|BMCR_S100);
  179 
  180         mii_phy_reset(sc);
  181 
  182         sc->mii_capabilities =
  183             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  184         device_printf(dev, " ");
  185         mii_add_media(sc);
  186         printf("\n");
  187 #undef ADD
  188 
  189         MIIBUS_MEDIAINIT(sc->mii_dev);
  190         return(0);
  191 }
  192 
  193 static int
  194 nsphy_service(sc, mii, cmd)
  195         struct mii_softc *sc;
  196         struct mii_data *mii;
  197         int cmd;
  198 {
  199         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  200         int reg;
  201 
  202         switch (cmd) {
  203         case MII_POLLSTAT:
  204                 /*
  205                  * If we're not polling our PHY instance, just return.
  206                  */
  207                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  208                         return (0);
  209                 break;
  210 
  211         case MII_MEDIACHG:
  212                 /*
  213                  * If the media indicates a different PHY instance,
  214                  * isolate ourselves.
  215                  */
  216                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  217                         reg = PHY_READ(sc, MII_BMCR);
  218                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  219                         return (0);
  220                 }
  221 
  222                 /*
  223                  * If the interface is not up, don't do anything.
  224                  */
  225                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  226                         break;
  227 
  228                 reg = PHY_READ(sc, MII_NSPHY_PCR);
  229 
  230                 /*
  231                  * Set up the PCR to use LED4 to indicate full-duplex
  232                  * in both 10baseT and 100baseTX modes.
  233                  */
  234                 reg |= PCR_LED4MODE;
  235 
  236                 /*
  237                  * Make sure Carrier Intgrity Monitor function is
  238                  * disabled (normal for Node operation, but sometimes
  239                  * it's not set?!)
  240                  */
  241                 reg |= PCR_CIMDIS;
  242 
  243                 /*
  244                  * Make sure "force link good" is set to normal mode.
  245                  * It's only intended for debugging.
  246                  */
  247                 reg |= PCR_FLINK100;
  248 
  249                 /*
  250                  * Mystery bits which are supposedly `reserved',
  251                  * but we seem to need to set them when the PHY
  252                  * is connected to some interfaces:
  253                  *
  254                  * 0x0400 is needed for fxp
  255                  *        (Intel EtherExpress Pro 10+/100B, 82557 chip)
  256                  *        (nsphy with a DP83840 chip)
  257                  * 0x0100 may be needed for some other card
  258                  */
  259                 reg |= 0x0100 | 0x0400;
  260 
  261                 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)),
  262                     "fxp") == 0)
  263                         PHY_WRITE(sc, MII_NSPHY_PCR, reg);
  264 
  265                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  266                 case IFM_AUTO:
  267                         /*
  268                          * If we're already in auto mode, just return.
  269                          */
  270                         if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
  271                                 return (0);
  272                         (void) mii_phy_auto(sc);
  273                         break;
  274                 case IFM_100_T4:
  275                         /*
  276                          * XXX Not supported as a manual setting right now.
  277                          */
  278                         return (EINVAL);
  279                 default:
  280                         /*
  281                          * BMCR data is stored in the ifmedia entry.
  282                          */
  283                         PHY_WRITE(sc, MII_ANAR,
  284                             mii_anar(ife->ifm_media));
  285                         PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
  286                 }
  287                 break;
  288 
  289         case MII_TICK:
  290                 /*
  291                  * If we're not currently selected, just return.
  292                  */
  293                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  294                         return (0);
  295                 if (mii_phy_tick(sc) == EJUSTRETURN)
  296                         return (0);
  297                 break;
  298         }
  299 
  300         /* Update the media status. */
  301         nsphy_status(sc);
  302 
  303         /* Callback if something changed. */
  304         mii_phy_update(sc, cmd);
  305         return (0);
  306 }
  307 
  308 static void
  309 nsphy_status(sc)
  310         struct mii_softc *sc;
  311 {
  312         struct mii_data *mii = sc->mii_pdata;
  313         int bmsr, bmcr, par, anlpar;
  314 
  315         mii->mii_media_status = IFM_AVALID;
  316         mii->mii_media_active = IFM_ETHER;
  317 
  318         bmsr = PHY_READ(sc, MII_BMSR) |
  319             PHY_READ(sc, MII_BMSR);
  320         if (bmsr & BMSR_LINK)
  321                 mii->mii_media_status |= IFM_ACTIVE;
  322 
  323         bmcr = PHY_READ(sc, MII_BMCR);
  324         if (bmcr & BMCR_ISO) {
  325                 mii->mii_media_active |= IFM_NONE;
  326                 mii->mii_media_status = 0;
  327                 return;
  328         }
  329 
  330         if (bmcr & BMCR_LOOP)
  331                 mii->mii_media_active |= IFM_LOOP;
  332 
  333         if (bmcr & BMCR_AUTOEN) {
  334                 /*
  335                  * The PAR status bits are only valid of autonegotiation
  336                  * has completed (or it's disabled).
  337                  */
  338                 if ((bmsr & BMSR_ACOMP) == 0) {
  339                         /* Erg, still trying, I guess... */
  340                         mii->mii_media_active |= IFM_NONE;
  341                         return;
  342                 }
  343 
  344                 /*
  345                  * Argh.  The PAR doesn't seem to indicate duplex mode
  346                  * properly!  Determine media based on link partner's
  347                  * advertised capabilities.
  348                  */
  349                 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
  350                         anlpar = PHY_READ(sc, MII_ANAR) &
  351                             PHY_READ(sc, MII_ANLPAR);
  352                         if (anlpar & ANLPAR_T4)
  353                                 mii->mii_media_active |= IFM_100_T4;
  354                         else if (anlpar & ANLPAR_TX_FD)
  355                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  356                         else if (anlpar & ANLPAR_TX)
  357                                 mii->mii_media_active |= IFM_100_TX;
  358                         else if (anlpar & ANLPAR_10_FD)
  359                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
  360                         else if (anlpar & ANLPAR_10)
  361                                 mii->mii_media_active |= IFM_10_T;
  362                         else
  363                                 mii->mii_media_active |= IFM_NONE;
  364                         return;
  365                 }
  366 
  367                 /*
  368                  * Link partner is not capable of autonegotiation.
  369                  * We will never be in full-duplex mode if this is
  370                  * the case, so reading the PAR is OK.
  371                  */
  372                 par = PHY_READ(sc, MII_NSPHY_PAR);
  373                 if (par & PAR_10)
  374                         mii->mii_media_active |= IFM_10_T;
  375                 else
  376                         mii->mii_media_active |= IFM_100_TX;
  377 #if 0
  378                 if (par & PAR_FDX)
  379                         mii->mii_media_active |= IFM_FDX;
  380 #endif
  381         } else
  382                 mii->mii_media_active |= mii_media_from_bmcr(bmcr);
  383 }

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