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("$FreeBSD$");
   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 const struct mii_phy_funcs gentbi_funcs = {
  115         gentbi_service,
  116         gentbi_status,
  117         mii_phy_reset
  118 };
  119 
  120 static int
  121 gentbi_probe(device_t dev)
  122 {
  123         device_t parent;
  124         struct mii_attach_args *ma;
  125         int bmsr, extsr;
  126 
  127         parent = device_get_parent(dev);
  128         ma = device_get_ivars(dev);
  129 
  130         /*
  131          * We match as a generic TBI if:
  132          *
  133          *      - There is no media in the BMSR.
  134          *      - EXTSR has only 1000X.
  135          */
  136         bmsr = MIIBUS_READREG(parent, ma->mii_phyno, MII_BMSR);
  137         if ((bmsr & BMSR_EXTSTAT) == 0 || (bmsr & BMSR_MEDIAMASK) != 0)
  138                 return (ENXIO);
  139 
  140         extsr = MIIBUS_READREG(parent, ma->mii_phyno, MII_EXTSR);
  141         if (extsr & (EXTSR_1000TFDX|EXTSR_1000THDX))
  142                 return (ENXIO);
  143 
  144         if (extsr & (EXTSR_1000XFDX|EXTSR_1000XHDX)) {
  145                 /*
  146                  * We think this is a generic TBI.  Return a match
  147                  * priority higher than ukphy, but lower than what
  148                  * specific drivers will return.
  149                  */
  150                 device_set_desc(dev, "Generic ten-bit interface");
  151                 return (BUS_PROBE_LOW_PRIORITY);
  152         }
  153 
  154         return (ENXIO);
  155 }
  156 
  157 static int
  158 gentbi_attach(device_t dev)
  159 {
  160         struct mii_softc *sc;
  161 
  162         sc = device_get_softc(dev);
  163 
  164         mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &gentbi_funcs, 0);
  165 
  166         PHY_RESET(sc);
  167 
  168         /*
  169          * Mask out all media in the BMSR.  We only are really interested
  170          * in "auto".
  171          */
  172         sc->mii_capabilities =
  173             PHY_READ(sc, MII_BMSR) & sc->mii_capmask & ~BMSR_MEDIAMASK;
  174         if (sc->mii_capabilities & BMSR_EXTSTAT)
  175                 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
  176 
  177         device_printf(dev, " ");
  178         mii_phy_add_media(sc);
  179         printf("\n");
  180 
  181         MIIBUS_MEDIAINIT(sc->mii_dev);
  182         return (0);
  183 }
  184 
  185 static int
  186 gentbi_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  187 {
  188 
  189         switch (cmd) {
  190         case MII_POLLSTAT:
  191                 break;
  192 
  193         case MII_MEDIACHG:
  194                 /*
  195                  * If the interface is not up, don't do anything.
  196                  */
  197                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  198                         break;
  199 
  200                 mii_phy_setmedia(sc);
  201                 break;
  202 
  203         case MII_TICK:
  204                 if (mii_phy_tick(sc) == EJUSTRETURN)
  205                         return (0);
  206                 break;
  207         }
  208 
  209         /* Update the media status. */
  210         PHY_STATUS(sc);
  211 
  212         /* Callback if something changed. */
  213         mii_phy_update(sc, cmd);
  214         return (0);
  215 }
  216 
  217 static void
  218 gentbi_status(struct mii_softc *sc)
  219 {
  220         struct mii_data *mii = sc->mii_pdata;
  221         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  222         int bmsr, bmcr, anlpar;
  223 
  224         mii->mii_media_status = IFM_AVALID;
  225         mii->mii_media_active = IFM_ETHER;
  226 
  227         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  228 
  229         if (bmsr & BMSR_LINK)
  230                 mii->mii_media_status |= IFM_ACTIVE;
  231 
  232         bmcr = PHY_READ(sc, MII_BMCR);
  233         if (bmcr & BMCR_ISO) {
  234                 mii->mii_media_active |= IFM_NONE;
  235                 mii->mii_media_status = 0;
  236                 return;
  237         }
  238 
  239         if (bmcr & BMCR_LOOP)
  240                 mii->mii_media_active |= IFM_LOOP;
  241 
  242         if (bmcr & BMCR_AUTOEN) {
  243                 /*
  244                  * The media status bits are only valid if autonegotiation
  245                  * has completed (or it's disabled).
  246                  */
  247                 if ((bmsr & BMSR_ACOMP) == 0) {
  248                         /* Erg, still trying, I guess... */
  249                         mii->mii_media_active |= IFM_NONE;
  250                         return;
  251                 }
  252 
  253                 /*
  254                  * The media is always 1000baseSX.  Check the ANLPAR to
  255                  * see if we're doing full-duplex.
  256                  */
  257                 mii->mii_media_active |= IFM_1000_SX;
  258                 anlpar = PHY_READ(sc, MII_ANLPAR);
  259                 if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0 &&
  260                     (anlpar & ANLPAR_X_FD) != 0)
  261                         mii->mii_media_active |=
  262                             IFM_FDX | mii_phy_flowstatus(sc);
  263                 else
  264                         mii->mii_media_active |= IFM_HDX;
  265         } else
  266                 mii->mii_media_active = ife->ifm_media;
  267 }

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

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sys/dev/mii/gentbi.c