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/gentbi.c

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    1 /*      $NetBSD: gentbi.c,v 1.15 2006/03/29 07:05:24 thorpej Exp $      */
    2 
    3 /*-
    4  * Copyright (c) 1998, 1999, 2000, 2001 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  *
   20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   30  * POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 /*
   34  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
   35  *
   36  * Redistribution and use in source and binary forms, with or without
   37  * modification, are permitted provided that the following conditions
   38  * are met:
   39  * 1. Redistributions of source code must retain the above copyright
   40  *    notice, this list of conditions and the following disclaimer.
   41  * 2. Redistributions in binary form must reproduce the above copyright
   42  *    notice, this list of conditions and the following disclaimer in the
   43  *    documentation and/or other materials provided with the distribution.
   44  *
   45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   46  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   47  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   48  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   49  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   50  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   51  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   52  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   53  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   54  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   55  */
   56 
   57 /*
   58  * Driver for generic ten-bit (1000BASE-SX) interfaces, built into
   59  * many Gigabit Ethernet chips.
   60  *
   61  * All we have to do here is correctly report speed and duplex.
   62  */
   63 
   64 #include <sys/cdefs.h>
   65 __FBSDID("$FreeBSD: releng/8.4/sys/dev/mii/gentbi.c 230718 2012-01-29 01:35:14Z marius $");
   66 
   67 /*
   68  * Driver for generic unknown ten-bit interfaces(1000BASE-{LX,SX}
   69  * fiber interfaces).
   70  */
   71 
   72 #include <sys/param.h>
   73 #include <sys/systm.h>
   74 #include <sys/kernel.h>
   75 #include <sys/module.h>
   76 #include <sys/socket.h>
   77 #include <sys/errno.h>
   78 #include <sys/bus.h>
   79 
   80 #include <net/if.h>
   81 #include <net/if_media.h>
   82 
   83 #include <dev/mii/mii.h>
   84 #include <dev/mii/miivar.h>
   85 #include "miidevs.h"
   86 
   87 #include "miibus_if.h"
   88 
   89 static int      gentbi_probe(device_t);
   90 static int      gentbi_attach(device_t);
   91 
   92 static device_method_t gentbi_methods[] = {
   93         /* device interface */
   94         DEVMETHOD(device_probe,         gentbi_probe),
   95         DEVMETHOD(device_attach,        gentbi_attach),
   96         DEVMETHOD(device_detach,        mii_phy_detach),
   97         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   98         DEVMETHOD_END
   99 };
  100 
  101 static devclass_t gentbi_devclass;
  102 
  103 static driver_t gentbi_driver = {
  104         "gentbi",
  105         gentbi_methods,
  106         sizeof(struct mii_softc)
  107 };
  108 
  109 DRIVER_MODULE(gentbi, miibus, gentbi_driver, gentbi_devclass, 0, 0);
  110 
  111 static int      gentbi_service(struct mii_softc *, struct mii_data *, int);
  112 static void     gentbi_status(struct mii_softc *);
  113 
  114 static int
  115 gentbi_probe(device_t dev)
  116 {
  117         device_t parent;
  118         struct mii_attach_args *ma;
  119         int bmsr, extsr;
  120 
  121         parent = device_get_parent(dev);
  122         ma = device_get_ivars(dev);
  123 
  124         /*
  125          * We match as a generic TBI if:
  126          *
  127          *      - There is no media in the BMSR.
  128          *      - EXTSR has only 1000X.
  129          */
  130         bmsr = MIIBUS_READREG(parent, ma->mii_phyno, MII_BMSR);
  131         if ((bmsr & BMSR_EXTSTAT) == 0 || (bmsr & BMSR_MEDIAMASK) != 0)
  132                 return (ENXIO);
  133 
  134         extsr = MIIBUS_READREG(parent, ma->mii_phyno, MII_EXTSR);
  135         if (extsr & (EXTSR_1000TFDX|EXTSR_1000THDX))
  136                 return (ENXIO);
  137 
  138         if (extsr & (EXTSR_1000XFDX|EXTSR_1000XHDX)) {
  139                 /*
  140                  * We think this is a generic TBI.  Return a match
  141                  * priority higher than ukphy, but lower than what
  142                  * specific drivers will return.
  143                  */
  144                 device_set_desc(dev, "Generic ten-bit interface");
  145                 return (BUS_PROBE_LOW_PRIORITY);
  146         }
  147 
  148         return (ENXIO);
  149 }
  150 
  151 static int
  152 gentbi_attach(device_t dev)
  153 {
  154         struct mii_softc *sc;
  155         struct mii_attach_args *ma;
  156         struct mii_data *mii;
  157 
  158         sc = device_get_softc(dev);
  159         ma = device_get_ivars(dev);
  160         sc->mii_dev = device_get_parent(dev);
  161         mii = ma->mii_data;
  162         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  163 
  164         if (bootverbose)
  165                 device_printf(dev, "OUI 0x%06x, model 0x%04x, rev. %d\n",
  166                     MII_OUI(ma->mii_id1, ma->mii_id2),
  167                     MII_MODEL(ma->mii_id2), MII_REV(ma->mii_id2));
  168 
  169         sc->mii_flags = miibus_get_flags(dev);
  170         sc->mii_inst = mii->mii_instance++;
  171         sc->mii_phy = ma->mii_phyno;
  172         sc->mii_service = gentbi_service;
  173         sc->mii_pdata = mii;
  174 
  175         sc->mii_flags |= MIIF_NOMANPAUSE;
  176 
  177         mii_phy_reset(sc);
  178 
  179         /*
  180          * Mask out all media in the BMSR.  We only are really interested
  181          * in "auto".
  182          */
  183         sc->mii_capabilities =
  184             PHY_READ(sc, MII_BMSR) & ma->mii_capmask & ~BMSR_MEDIAMASK;
  185         if (sc->mii_capabilities & BMSR_EXTSTAT)
  186                 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
  187 
  188         device_printf(dev, " ");
  189         mii_phy_add_media(sc);
  190         printf("\n");
  191 
  192         MIIBUS_MEDIAINIT(sc->mii_dev);
  193         return (0);
  194 }
  195 
  196 static int
  197 gentbi_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  198 {
  199 
  200         switch (cmd) {
  201         case MII_POLLSTAT:
  202                 break;
  203 
  204         case MII_MEDIACHG:
  205                 /*
  206                  * If the interface is not up, don't do anything.
  207                  */
  208                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  209                         break;
  210 
  211                 mii_phy_setmedia(sc);
  212                 break;
  213 
  214         case MII_TICK:
  215                 if (mii_phy_tick(sc) == EJUSTRETURN)
  216                         return (0);
  217                 break;
  218         }
  219 
  220         /* Update the media status. */
  221         gentbi_status(sc);
  222 
  223         /* Callback if something changed. */
  224         mii_phy_update(sc, cmd);
  225         return (0);
  226 }
  227 
  228 static void
  229 gentbi_status(struct mii_softc *sc)
  230 {
  231         struct mii_data *mii = sc->mii_pdata;
  232         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  233         int bmsr, bmcr, anlpar;
  234 
  235         mii->mii_media_status = IFM_AVALID;
  236         mii->mii_media_active = IFM_ETHER;
  237 
  238         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  239 
  240         if (bmsr & BMSR_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                 /*
  265                  * The media is always 1000baseSX.  Check the ANLPAR to
  266                  * see if we're doing full-duplex.
  267                  */
  268                 mii->mii_media_active |= IFM_1000_SX;
  269                 anlpar = PHY_READ(sc, MII_ANLPAR);
  270                 if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0 &&
  271                     (anlpar & ANLPAR_X_FD) != 0)
  272                         mii->mii_media_active |=
  273                             IFM_FDX | mii_phy_flowstatus(sc);
  274                 else
  275                         mii->mii_media_active |= IFM_HDX;
  276         } else
  277                 mii->mii_media_active = ife->ifm_media;
  278 }

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