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

     /*      $NetBSD: gentbi.c,v 1.15 2006/03/29 07:05:24 thorpej Exp $      */
     
     /*-
      * SPDX-License-Identifier: BSD-2-Clause-NetBSD AND BSD-2-Clause
      *
      * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
     * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
     * NASA Ames Research Center.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    /*
     * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    /*
     * Driver for generic ten-bit (1000BASE-SX) interfaces, built into
     * many Gigabit Ethernet chips.
     *
     * All we have to do here is correctly report speed and duplex.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    /*
     * Driver for generic unknown ten-bit interfaces(1000BASE-{LX,SX}
     * fiber interfaces).
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/socket.h>
    #include <sys/errno.h>
    #include <sys/bus.h>
    
    #include <net/if.h>
    #include <net/if_media.h>
    
    #include <dev/mii/mii.h>
    #include <dev/mii/miivar.h>
    #include "miidevs.h"
    
    #include "miibus_if.h"
    
    static int      gentbi_probe(device_t);
    static int      gentbi_attach(device_t);
    
    static device_method_t gentbi_methods[] = {
            /* device interface */
            DEVMETHOD(device_probe,         gentbi_probe),
            DEVMETHOD(device_attach,        gentbi_attach),
            DEVMETHOD(device_detach,        mii_phy_detach),
            DEVMETHOD(device_shutdown,      bus_generic_shutdown),
           DEVMETHOD_END
   };
   
   static devclass_t gentbi_devclass;
   
   static driver_t gentbi_driver = {
           "gentbi",
           gentbi_methods,
           sizeof(struct mii_softc)
   };
   
   DRIVER_MODULE(gentbi, miibus, gentbi_driver, gentbi_devclass, 0, 0);
   
   static int      gentbi_service(struct mii_softc *, struct mii_data *, int);
   static void     gentbi_status(struct mii_softc *);
   
   static const struct mii_phy_funcs gentbi_funcs = {
           gentbi_service,
           gentbi_status,
           mii_phy_reset
   };
   
   static int
   gentbi_probe(device_t dev)
   {
           device_t parent;
           struct mii_attach_args *ma;
           int bmsr, extsr;
   
           parent = device_get_parent(dev);
           ma = device_get_ivars(dev);
   
           /*
            * We match as a generic TBI if:
            *
            *      - There is no media in the BMSR.
            *      - EXTSR has only 1000X.
            */
           bmsr = MIIBUS_READREG(parent, ma->mii_phyno, MII_BMSR);
           if ((bmsr & BMSR_EXTSTAT) == 0 || (bmsr & BMSR_MEDIAMASK) != 0)
                   return (ENXIO);
   
           extsr = MIIBUS_READREG(parent, ma->mii_phyno, MII_EXTSR);
           if (extsr & (EXTSR_1000TFDX|EXTSR_1000THDX))
                   return (ENXIO);
   
           if (extsr & (EXTSR_1000XFDX|EXTSR_1000XHDX)) {
                   /*
                    * We think this is a generic TBI.  Return a match
                    * priority higher than ukphy, but lower than what
                    * specific drivers will return.
                    */
                   device_set_desc(dev, "Generic ten-bit interface");
                   return (BUS_PROBE_LOW_PRIORITY);
           }
   
           return (ENXIO);
   }
   
   static int
   gentbi_attach(device_t dev)
   {
           struct mii_softc *sc;
   
           sc = device_get_softc(dev);
   
           mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &gentbi_funcs, 0);
   
           PHY_RESET(sc);
   
           /*
            * Mask out all media in the BMSR.  We only are really interested
            * in "auto".
            */
           sc->mii_capabilities =
               PHY_READ(sc, MII_BMSR) & sc->mii_capmask & ~BMSR_MEDIAMASK;
           if (sc->mii_capabilities & BMSR_EXTSTAT)
                   sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
   
           device_printf(dev, " ");
           mii_phy_add_media(sc);
           printf("\n");
   
           MIIBUS_MEDIAINIT(sc->mii_dev);
           return (0);
   }
   
   static int
   gentbi_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
   {
   
           switch (cmd) {
           case MII_POLLSTAT:
                   break;
   
           case MII_MEDIACHG:
                   mii_phy_setmedia(sc);
                   break;
   
           case MII_TICK:
                   if (mii_phy_tick(sc) == EJUSTRETURN)
                           return (0);
                   break;
           }
   
           /* Update the media status. */
           PHY_STATUS(sc);
   
           /* Callback if something changed. */
           mii_phy_update(sc, cmd);
           return (0);
   }
   
   static void
   gentbi_status(struct mii_softc *sc)
   {
           struct mii_data *mii = sc->mii_pdata;
           struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
           int bmsr, bmcr, anlpar;
   
           mii->mii_media_status = IFM_AVALID;
           mii->mii_media_active = IFM_ETHER;
   
           bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
   
           if (bmsr & BMSR_LINK)
                   mii->mii_media_status |= IFM_ACTIVE;
   
           bmcr = PHY_READ(sc, MII_BMCR);
           if (bmcr & BMCR_ISO) {
                   mii->mii_media_active |= IFM_NONE;
                   mii->mii_media_status = 0;
                   return;
           }
   
           if (bmcr & BMCR_LOOP)
                   mii->mii_media_active |= IFM_LOOP;
   
           if (bmcr & BMCR_AUTOEN) {
                   /*
                    * The media status bits are only valid if autonegotiation
                    * has completed (or it's disabled).
                    */
                   if ((bmsr & BMSR_ACOMP) == 0) {
                           /* Erg, still trying, I guess... */
                           mii->mii_media_active |= IFM_NONE;
                           return;
                   }
   
                   /*
                    * The media is always 1000baseSX.  Check the ANLPAR to
                    * see if we're doing full-duplex.
                    */
                   mii->mii_media_active |= IFM_1000_SX;
                   anlpar = PHY_READ(sc, MII_ANLPAR);
                   if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0 &&
                       (anlpar & ANLPAR_X_FD) != 0)
                           mii->mii_media_active |=
                               IFM_FDX | mii_phy_flowstatus(sc);
                   else
                           mii->mii_media_active |= IFM_HDX;
           } else
                   mii->mii_media_active = ife->ifm_media;
   }

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