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  * 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 generic ten-bit (1000BASE-SX) interfaces, built in to
   71  * many Gigabit Ethernet chips.
   72  *
   73  * All we have to do here is correctly report speed and duplex.
   74  */
   75 
   76 #include <sys/cdefs.h>
   77 __FBSDID("$FreeBSD$");
   78 
   79 /*
   80  * Driver for generic unknown ten-bit interfaces(1000BASE-{LX,SX}
   81  * fiber interfaces).
   82  */
   83 
   84 #include <sys/param.h>
   85 #include <sys/systm.h>
   86 #include <sys/kernel.h>
   87 #include <sys/module.h>
   88 #include <sys/socket.h>
   89 #include <sys/errno.h>
   90 #include <sys/bus.h>
   91 
   92 #include <net/if.h>
   93 #include <net/if_media.h>
   94 
   95 #include <dev/mii/mii.h>
   96 #include <dev/mii/miivar.h>
   97 #include "miidevs.h"
   98 
   99 #include "miibus_if.h"
  100 
  101 static int      gentbi_probe(device_t);
  102 static int      gentbi_attach(device_t);
  103 
  104 static device_method_t gentbi_methods[] = {
  105         /* device interface */
  106         DEVMETHOD(device_probe,         gentbi_probe),
  107         DEVMETHOD(device_attach,        gentbi_attach),
  108         DEVMETHOD(device_detach,        mii_phy_detach),
  109         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  110         {0, 0}
  111 };
  112 
  113 static devclass_t gentbi_devclass;
  114 
  115 static driver_t gentbi_driver = {
  116         "gentbi",
  117         gentbi_methods,
  118         sizeof(struct mii_softc)
  119 };
  120 
  121 DRIVER_MODULE(gentbi, miibus, gentbi_driver, gentbi_devclass, 0, 0);
  122 
  123 static int      gentbi_service(struct mii_softc *, struct mii_data *, int);
  124 static void     gentbi_status(struct mii_softc *);
  125 
  126 static int
  127 gentbi_probe(device_t dev)
  128 {
  129         device_t parent;
  130         struct mii_attach_args *ma;
  131         int bmsr, extsr;
  132 
  133         parent = device_get_parent(dev);
  134         ma = device_get_ivars(dev);
  135 
  136         /*
  137          * We match as a generic TBI if:
  138          *
  139          *      - There is no media in the BMSR.
  140          *      - EXTSR has only 1000X.
  141          */
  142         bmsr = MIIBUS_READREG(parent, ma->mii_phyno, MII_BMSR);
  143         if ((bmsr & BMSR_EXTSTAT) == 0 || (bmsr & BMSR_MEDIAMASK) != 0)
  144                 return (ENXIO);
  145 
  146         extsr = MIIBUS_READREG(parent, ma->mii_phyno, MII_EXTSR);
  147         if (extsr & (EXTSR_1000TFDX|EXTSR_1000THDX))
  148                 return (ENXIO);
  149 
  150         if (extsr & (EXTSR_1000XFDX|EXTSR_1000XHDX)) {
  151                 /*
  152                  * We think this is a generic TBI.  Return a match
  153                  * priority higher than ukphy, but lower than what
  154                  * specific drivers will return.
  155                  */
  156                 device_set_desc(dev, "Generic ten-bit interface");
  157                 return (BUS_PROBE_LOW_PRIORITY);
  158         }
  159 
  160         return (ENXIO);
  161 }
  162 
  163 static int
  164 gentbi_attach(device_t dev)
  165 {
  166         struct mii_softc *sc;
  167         struct mii_attach_args *ma;
  168         struct mii_data *mii;
  169 
  170         sc = device_get_softc(dev);
  171         ma = device_get_ivars(dev);
  172         sc->mii_dev = device_get_parent(dev);
  173         mii = device_get_softc(sc->mii_dev);
  174         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  175 
  176         if (bootverbose)
  177                 device_printf(dev, "OUI 0x%06x, model 0x%04x, rev. %d\n",
  178                     MII_OUI(ma->mii_id1, ma->mii_id2),
  179                     MII_MODEL(ma->mii_id2), MII_REV(ma->mii_id2));
  180 
  181         sc->mii_inst = mii->mii_instance;
  182         sc->mii_phy = ma->mii_phyno;
  183         sc->mii_service = gentbi_service;
  184         sc->mii_pdata = mii;
  185 
  186         mii->mii_instance++;
  187 
  188         mii_phy_reset(sc);
  189 
  190         /*
  191          * Mask out all media in the BMSR.  We only are really interested
  192          * in "auto".
  193          */
  194         sc->mii_capabilities =
  195             PHY_READ(sc, MII_BMSR) & ma->mii_capmask & ~BMSR_MEDIAMASK;
  196         if (sc->mii_capabilities & BMSR_EXTSTAT)
  197                 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
  198 
  199         device_printf(dev, " ");
  200         mii_phy_add_media(sc);
  201         printf("\n");
  202 
  203         MIIBUS_MEDIAINIT(sc->mii_dev);
  204         return (0);
  205 }
  206 
  207 static int
  208 gentbi_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  209 {
  210         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  211         int reg;
  212 
  213         switch (cmd) {
  214         case MII_POLLSTAT:
  215                 /*
  216                  * If we're not polling our PHY instance, just return.
  217                  */
  218                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  219                         return (0);
  220                 break;
  221 
  222         case MII_MEDIACHG:
  223                 /*
  224                  * If the media indicates a different PHY instance,
  225                  * isolate ourselves.
  226                  */
  227                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  228                         reg = PHY_READ(sc, MII_BMCR);
  229                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  230                         return (0);
  231                 }
  232 
  233                 /*
  234                  * If the interface is not up, don't do anything.
  235                  */
  236                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  237                         break;
  238 
  239                 mii_phy_setmedia(sc);
  240                 break;
  241 
  242         case MII_TICK:
  243                 /*
  244                  * If we're not currently selected, just return.
  245                  */
  246                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  247                         return (0);
  248 
  249                 if (mii_phy_tick(sc) == EJUSTRETURN)
  250                         return (0);
  251                 break;
  252         }
  253 
  254         /* Update the media status. */
  255         gentbi_status(sc);
  256 
  257         /* Callback if something changed. */
  258         mii_phy_update(sc, cmd);
  259         return (0);
  260 }
  261 
  262 static void
  263 gentbi_status(struct mii_softc *sc)
  264 {
  265         struct mii_data *mii = sc->mii_pdata;
  266         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  267         int bmsr, bmcr, anlpar;
  268 
  269         mii->mii_media_status = IFM_AVALID;
  270         mii->mii_media_active = IFM_ETHER;
  271 
  272         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  273 
  274         if (bmsr & BMSR_LINK)
  275                 mii->mii_media_status |= IFM_ACTIVE;
  276 
  277         bmcr = PHY_READ(sc, MII_BMCR);
  278         if (bmcr & BMCR_ISO) {
  279                 mii->mii_media_active |= IFM_NONE;
  280                 mii->mii_media_status = 0;
  281                 return;
  282         }
  283 
  284         if (bmcr & BMCR_LOOP)
  285                 mii->mii_media_active |= IFM_LOOP;
  286 
  287         if (bmcr & BMCR_AUTOEN) {
  288                 /*
  289                  * The media status bits are only valid if autonegotiation
  290                  * has completed (or it's disabled).
  291                  */
  292                 if ((bmsr & BMSR_ACOMP) == 0) {
  293                         /* Erg, still trying, I guess... */
  294                         mii->mii_media_active |= IFM_NONE;
  295                         return;
  296                 }
  297 
  298                 /*
  299                  * The media is always 1000baseSX.  Check the ANLPAR to
  300                  * see if we're doing full-duplex.
  301                  */
  302                 mii->mii_media_active |= IFM_1000_SX;
  303 
  304                 anlpar = PHY_READ(sc, MII_ANLPAR);
  305                 if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0 &&
  306                     (anlpar & ANLPAR_X_FD) != 0)
  307                         mii->mii_media_active |= IFM_FDX;
  308         } else
  309                 mii->mii_media_active = ife->ifm_media;
  310 }
Cache object: d789107b2939d93db70a4616cb53c1ae
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/gentbi.c

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sys/dev/mii/gentbi.c
