gentbi.c

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    1 /*      $NetBSD: gentbi.c,v 1.15 2006/03/29 07:05:24 thorpej Exp $      */
    2 
    3 /*-
    4  * SPDX-License-Identifier: BSD-2-Clause-NetBSD AND BSD-2-Clause
    5  *
    6  * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
    7  * All rights reserved.
    8  *
    9  * This code is derived from software contributed to The NetBSD Foundation
   10  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   11  * NASA Ames Research Center.
   12  *
   13  * Redistribution and use in source and binary forms, with or without
   14  * modification, are permitted provided that the following conditions
   15  * are met:
   16  * 1. Redistributions of source code must retain the above copyright
   17  *    notice, this list of conditions and the following disclaimer.
   18  * 2. Redistributions in binary form must reproduce the above copyright
   19  *    notice, this list of conditions and the following disclaimer in the
   20  *    documentation and/or other materials provided with the distribution.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   24  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   25  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   26  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   32  * POSSIBILITY OF SUCH DAMAGE.
   33  */
   34 
   35 /*
   36  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
   37  *
   38  * Redistribution and use in source and binary forms, with or without
   39  * modification, are permitted provided that the following conditions
   40  * are met:
   41  * 1. Redistributions of source code must retain the above copyright
   42  *    notice, this list of conditions and the following disclaimer.
   43  * 2. Redistributions in binary form must reproduce the above copyright
   44  *    notice, this list of conditions and the following disclaimer in the
   45  *    documentation and/or other materials provided with the distribution.
   46  *
   47  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   48  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   49  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   50  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   51  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   52  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   53  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   54  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   55  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   56  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   57  */
   58 
   59 /*
   60  * Driver for generic ten-bit (1000BASE-SX) interfaces, built into
   61  * many Gigabit Ethernet chips.
   62  *
   63  * All we have to do here is correctly report speed and duplex.
   64  */
   65 
   66 #include <sys/cdefs.h>
   67 __FBSDID("$FreeBSD$");
   68 
   69 /*
   70  * Driver for generic unknown ten-bit interfaces(1000BASE-{LX,SX}
   71  * fiber interfaces).
   72  */
   73 
   74 #include <sys/param.h>
   75 #include <sys/systm.h>
   76 #include <sys/kernel.h>
   77 #include <sys/module.h>
   78 #include <sys/socket.h>
   79 #include <sys/errno.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 "miidevs.h"
   88 
   89 #include "miibus_if.h"
   90 
   91 static int      gentbi_probe(device_t);
   92 static int      gentbi_attach(device_t);
   93 
   94 static device_method_t gentbi_methods[] = {
   95         /* device interface */
   96         DEVMETHOD(device_probe,         gentbi_probe),
   97         DEVMETHOD(device_attach,        gentbi_attach),
   98         DEVMETHOD(device_detach,        mii_phy_detach),
   99         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  100         DEVMETHOD_END
  101 };
  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, 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                 mii_phy_setmedia(sc);
  195                 break;
  196 
  197         case MII_TICK:
  198                 if (mii_phy_tick(sc) == EJUSTRETURN)
  199                         return (0);
  200                 break;
  201         }
  202 
  203         /* Update the media status. */
  204         PHY_STATUS(sc);
  205 
  206         /* Callback if something changed. */
  207         mii_phy_update(sc, cmd);
  208         return (0);
  209 }
  210 
  211 static void
  212 gentbi_status(struct mii_softc *sc)
  213 {
  214         struct mii_data *mii = sc->mii_pdata;
  215         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  216         int bmsr, bmcr, anlpar;
  217 
  218         mii->mii_media_status = IFM_AVALID;
  219         mii->mii_media_active = IFM_ETHER;
  220 
  221         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  222 
  223         if (bmsr & BMSR_LINK)
  224                 mii->mii_media_status |= IFM_ACTIVE;
  225 
  226         bmcr = PHY_READ(sc, MII_BMCR);
  227         if (bmcr & BMCR_ISO) {
  228                 mii->mii_media_active |= IFM_NONE;
  229                 mii->mii_media_status = 0;
  230                 return;
  231         }
  232 
  233         if (bmcr & BMCR_LOOP)
  234                 mii->mii_media_active |= IFM_LOOP;
  235 
  236         if (bmcr & BMCR_AUTOEN) {
  237                 /*
  238                  * The media status bits are only valid if autonegotiation
  239                  * has completed (or it's disabled).
  240                  */
  241                 if ((bmsr & BMSR_ACOMP) == 0) {
  242                         /* Erg, still trying, I guess... */
  243                         mii->mii_media_active |= IFM_NONE;
  244                         return;
  245                 }
  246 
  247                 /*
  248                  * The media is always 1000baseSX.  Check the ANLPAR to
  249                  * see if we're doing full-duplex.
  250                  */
  251                 mii->mii_media_active |= IFM_1000_SX;
  252                 anlpar = PHY_READ(sc, MII_ANLPAR);
  253                 if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0 &&
  254                     (anlpar & ANLPAR_X_FD) != 0)
  255                         mii->mii_media_active |=
  256                             IFM_FDX | mii_phy_flowstatus(sc);
  257                 else
  258                         mii->mii_media_active |= IFM_HDX;
  259         } else
  260                 mii->mii_media_active = ife->ifm_media;
  261 }

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

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sys/dev/mii/gentbi.c