nsgphy.c

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    1 /*
    2  * Copyright (c) 2001 Wind River Systems
    3  * Copyright (c) 2001
    4  *      Bill Paul <wpaul@bsdi.com>.  All rights reserved.
    5  * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software contributed to The NetBSD Foundation
    9  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   10  * NASA Ames Research Center.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. All advertising materials mentioning features or use of this software
   21  *    must display the following acknowledgement:
   22  *      This product includes software developed by Bill Paul.
   23  * 4. Neither the name of the author nor the names of any co-contributors
   24  *    may be used to endorse or promote products derived from this software
   25  *    without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
   28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   30  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
   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
   37  * THE POSSIBILITY OF SUCH DAMAGE.
   38  *
   39  * $FreeBSD: releng/5.0/sys/dev/mii/nsgphy.c 106107 2002-10-29 00:20:47Z semenu $
   40  */
   41 
   42 /*
   43  * Driver for the National Semiconductor DP83891 and DP83861
   44  * 10/100/1000 PHYs.
   45  * Datasheet available at: http://www.national.com/ds/DP/DP83861.pdf
   46  *
   47  * The DP83891 is the older NatSemi gigE PHY which isn't being sold
   48  * anymore. The DP83861 is its replacement, which is an 'enhanced'
   49  * firmware driven component. The major difference between the
   50  * two is that the 83891 can't generate interrupts, while the
   51  * 83861 can. (I think it wasn't originally designed to do this, but
   52  * it can now thanks to firmware updates.) The 83861 also allows
   53  * access to its internal RAM via indirect register access.
   54  */
   55 
   56 #include <sys/param.h>
   57 #include <sys/systm.h>
   58 #include <sys/kernel.h>
   59 #include <sys/socket.h>
   60 #include <sys/bus.h>
   61 
   62 #include <machine/clock.h>
   63 
   64 #include <net/if.h>
   65 #include <net/if_media.h>
   66 
   67 #include <dev/mii/mii.h>
   68 #include <dev/mii/miivar.h>
   69 #include <dev/mii/miidevs.h>
   70 
   71 #include <dev/mii/nsgphyreg.h>
   72 
   73 #include "miibus_if.h"
   74 
   75 #if !defined(lint)
   76 static const char rcsid[] =
   77   "$FreeBSD: releng/5.0/sys/dev/mii/nsgphy.c 106107 2002-10-29 00:20:47Z semenu $";
   78 #endif
   79 
   80 static int nsgphy_probe(device_t);
   81 static int nsgphy_attach(device_t);
   82 
   83 static device_method_t nsgphy_methods[] = {
   84         /* device interface */
   85         DEVMETHOD(device_probe,         nsgphy_probe),
   86         DEVMETHOD(device_attach,        nsgphy_attach),
   87         DEVMETHOD(device_detach,        mii_phy_detach),
   88         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   89         { 0, 0 }
   90 };
   91 
   92 static devclass_t nsgphy_devclass;
   93 
   94 static driver_t nsgphy_driver = {
   95         "nsgphy",
   96         nsgphy_methods,
   97         sizeof(struct mii_softc)
   98 };
   99 
  100 
  101 DRIVER_MODULE(nsgphy, miibus, nsgphy_driver, nsgphy_devclass, 0, 0);
  102 
  103 static int      nsgphy_service(struct mii_softc *, struct mii_data *,int);
  104 static void     nsgphy_status(struct mii_softc *);
  105 
  106 const struct mii_phydesc gphyters[] = {
  107         { MII_OUI_NATSEMI,              MII_MODEL_NATSEMI_DP83861,
  108           MII_STR_NATSEMI_DP83861 },
  109 
  110         { MII_OUI_NATSEMI,              MII_MODEL_NATSEMI_DP83891,
  111           MII_STR_NATSEMI_DP83891 },
  112 
  113         { 0,                            0,
  114           NULL },
  115 };
  116 
  117 static int
  118 nsgphy_probe(device_t dev)
  119 {
  120         struct mii_attach_args *ma;
  121         const struct mii_phydesc *mpd;
  122 
  123         ma = device_get_ivars(dev);
  124         mpd = mii_phy_match(ma, gphyters);
  125         if (mpd != NULL) {
  126                 device_set_desc(dev, mpd->mpd_name);
  127                 return(0);
  128         }
  129 
  130         return(ENXIO);
  131 }
  132 
  133 static int
  134 nsgphy_attach(device_t dev)
  135 {
  136         struct mii_softc *sc;
  137         struct mii_attach_args *ma;
  138         struct mii_data *mii;
  139         const struct mii_phydesc *mpd;
  140 
  141         sc = device_get_softc(dev);
  142         ma = device_get_ivars(dev);
  143         mpd = mii_phy_match(ma, gphyters);
  144         if (bootverbose)
  145                 device_printf(dev, "<rev. %d>\n", MII_REV(ma->mii_id2));
  146         device_printf(dev, " ");
  147         sc->mii_dev = device_get_parent(dev);
  148         mii = device_get_softc(sc->mii_dev);
  149         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  150 
  151         sc->mii_inst = mii->mii_instance;
  152         sc->mii_phy = ma->mii_phyno;
  153         sc->mii_service = nsgphy_service;
  154         sc->mii_pdata = mii;
  155         sc->mii_anegticks = 5;
  156 
  157         mii->mii_instance++;
  158 
  159         sc->mii_capabilities = (PHY_READ(sc, MII_BMSR) |
  160             (BMSR_10TFDX|BMSR_10THDX)) & ma->mii_capmask;
  161         if (sc->mii_capabilities & BMSR_EXTSTAT)
  162                 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
  163 
  164         mii_phy_add_media(sc);
  165         printf("\n");
  166 
  167         MIIBUS_MEDIAINIT(sc->mii_dev);
  168         return(0);
  169 }
  170 
  171 static int
  172 nsgphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  173 {
  174         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  175         int reg;
  176 
  177         switch (cmd) {
  178         case MII_POLLSTAT:
  179                 /*
  180                  * If we're not polling our PHY instance, just return.
  181                  */
  182                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  183                         return (0);
  184                 break;
  185 
  186         case MII_MEDIACHG:
  187                 /*
  188                  * If the media indicates a different PHY instance,
  189                  * isolate ourselves.
  190                  */
  191                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  192                         reg = PHY_READ(sc, MII_BMCR);
  193                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  194                         return (0);
  195                 }
  196 
  197                 /*
  198                  * If the interface is not up, don't do anything.
  199                  */
  200                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  201                         break;
  202 
  203                 mii_phy_setmedia(sc);
  204                 break;
  205 
  206         case MII_TICK:
  207                 /*
  208                  * If we're not currently selected, just return.
  209                  */
  210                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  211                         return (0);
  212 
  213                 if (mii_phy_tick(sc) == EJUSTRETURN)
  214                         return (0);
  215                 break;
  216         }
  217 
  218         /* Update the media status. */
  219         nsgphy_status(sc);
  220 
  221         /* Callback if something changed. */
  222         mii_phy_update(sc, cmd);
  223         return (0);
  224 }
  225 
  226 static void
  227 nsgphy_status(struct mii_softc *sc)
  228 {
  229         struct mii_data *mii = sc->mii_pdata;
  230         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  231         int bmsr, bmcr, physup, gtsr;
  232 
  233         mii->mii_media_status = IFM_AVALID;
  234         mii->mii_media_active = IFM_ETHER;
  235 
  236         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  237 
  238         physup = PHY_READ(sc, NSGPHY_MII_PHYSUP);
  239 
  240         if (physup & PHY_SUP_LINK)
  241                 mii->mii_media_status |= IFM_ACTIVE;
  242 
  243         bmcr = PHY_READ(sc, MII_BMCR);
  244         if (bmcr & BMCR_ISO) {
  245                 mii->mii_media_active |= IFM_NONE;
  246                 mii->mii_media_status = 0;
  247                 return;
  248         }
  249 
  250         if (bmcr & BMCR_LOOP)
  251                 mii->mii_media_active |= IFM_LOOP;
  252 
  253         if (bmcr & BMCR_AUTOEN) {
  254                 /*
  255                  * The media status bits are only valid if autonegotiation
  256                  * has completed (or it's disabled).
  257                  */
  258                 if ((bmsr & BMSR_ACOMP) == 0) {
  259                         /* Erg, still trying, I guess... */
  260                         mii->mii_media_active |= IFM_NONE;
  261                         return;
  262                 }
  263 
  264                 switch (physup & (PHY_SUP_SPEED1|PHY_SUP_SPEED0)) {
  265                 case PHY_SUP_SPEED1:
  266                         mii->mii_media_active |= IFM_1000_T;
  267                         gtsr = PHY_READ(sc, MII_100T2SR);
  268                         if (gtsr & GTSR_MS_RES)
  269                                 mii->mii_media_active |= IFM_ETH_MASTER;
  270                         break;
  271 
  272                 case PHY_SUP_SPEED0:
  273                         mii->mii_media_active |= IFM_100_TX;
  274                         break;
  275 
  276                 case 0:
  277                         mii->mii_media_active |= IFM_10_T;
  278                         break;
  279 
  280                 default:
  281                         mii->mii_media_active |= IFM_NONE;
  282                         mii->mii_media_status = 0;
  283                 }
  284                 if (physup & PHY_SUP_DUPLEX)
  285                         mii->mii_media_active |= IFM_FDX;
  286         } else
  287                 mii->mii_media_active = ife->ifm_media;
  288 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/nsgphy.c

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