FreeBSD/Linux Kernel Cross Reference
sys/dev/netif/mii_layer/lxtphy.c

     /*      $OpenBSD: lxtphy.c,v 1.14 2005/02/19 06:00:04 brad Exp $        */
     /*      NetBSD: lxtphy.c,v 1.19 2000/02/02 23:34:57 thorpej Exp         */
     
     /*-
      * Copyright (c) 1998, 1999 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the NetBSD
     *      Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * 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.
     *
     * $FreeBSD: src/sys/dev/mii/lxtphy.c,v 1.1.2.1 2001/06/08 19:58:33 semenu Exp $
     */
     
    /*
     * 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Manuel Bouyer.
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * 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 Level One's LXT-970/LXT-971 ethernet 10/100 PHY
     * datasheet from www.level1.com
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/socket.h>
    #include <sys/errno.h>
    #include <sys/module.h>
    #include <sys/bus.h>
    
    #include <net/if.h>
    #include <net/if_media.h>
    
    #include "mii.h"
    #include "miivar.h"
    #include "miidevs.h"
    
    #include "lxtphyreg.h"
    
    #include "miibus_if.h"
    
    static int      lxtphy_probe(device_t);
    static int      lxtphy_attach(device_t);
    
    static int      lxtphy_service(struct mii_softc *, struct mii_data *, int);
   static void     lxtphy_status(struct mii_softc *);
   static void     lxtphy_reset(struct mii_softc *);
   static void     lxtphy_set_tp(struct mii_softc *);
   static void     lxtphy_set_fx(struct mii_softc *);
   
   static device_method_t lxtphy_methods[] = {
           /* device interface */
           DEVMETHOD(device_probe,         lxtphy_probe),
           DEVMETHOD(device_attach,        lxtphy_attach),
           DEVMETHOD(device_detach,        ukphy_detach),
           DEVMETHOD(device_shutdown,      bus_generic_shutdown),
           DEVMETHOD_END
   };
   
   static const struct mii_phydesc lxtphys[] = {
           MII_PHYDESC_ARG(xxLEVEL1,       LXT970, lxtphy_status),
           MII_PHYDESC_ARG(xxLEVEL1a,      LXT971, ukphy_status),
           MII_PHYDESC_NULL
   };
   
   static devclass_t lxtphy_devclass;
   
   static driver_t lxtphy_driver = {
           "lxtphy",
           lxtphy_methods,
           sizeof(struct mii_softc)
   };
   
   DRIVER_MODULE(lxtphy, miibus, lxtphy_driver, lxtphy_devclass, NULL, NULL);
   
   static int
   lxtphy_probe(device_t dev)
   {
           struct mii_attach_args *ma = device_get_ivars(dev);
           const struct mii_phydesc *mpd;
   
           mpd = mii_phy_match(ma, lxtphys);
           if (mpd != NULL) {
                   struct mii_softc *sc = device_get_softc(dev);
   
                   sc->mii_status = mpd->mpd_priv;
                   device_set_desc(dev, mpd->mpd_name);
                   return (0);
           }
           return (ENXIO);
   }
   
   static int
   lxtphy_attach(device_t dev)
   {
           struct mii_softc *sc;
           struct mii_attach_args *ma;
           struct mii_data *mii;
   
           sc = device_get_softc(dev);
           ma = device_get_ivars(dev);
           mii_softc_init(sc, ma);
           sc->mii_dev = device_get_parent(dev);
           mii = device_get_softc(sc->mii_dev);
           LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
   
           sc->mii_inst = mii->mii_instance;
           sc->mii_service = lxtphy_service;
           sc->mii_reset = lxtphy_reset;
           sc->mii_pdata = mii;
           sc->mii_flags |= MIIF_NOISOLATE;
   
           lxtphy_reset(sc);
   
           mii->mii_instance++;
   
   #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
           ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
               MII_MEDIA_NONE);
   #undef ADD
   
           sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
   
           device_printf(dev, " ");
           if (sc->mii_capabilities & BMSR_MEDIAMASK)
                   mii_phy_add_media(sc);
           else
                   kprintf("no media present");
           kprintf("\n");
   
           MIIBUS_MEDIAINIT(sc->mii_dev);
           return(0);
   }
   
   static int
   lxtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
   {
           struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
           int reg;
   
           switch (cmd) {
           case MII_POLLSTAT:
                   /*
                    * If we're not polling our PHY instance, just return.
                    */
                   if (IFM_INST(ife->ifm_media) != sc->mii_inst)
                           return (0);
                   break;
   
           case MII_MEDIACHG:
                   /*
                    * If the media indicates a different PHY instance,
                    * isolate ourselves.
                    */
                   if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
                           reg = PHY_READ(sc, MII_BMCR);
                           PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
                           return (0);
                   }
   
                   /*
                    * If the interface is not up, don't do anything.
                    */
                   if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
                           break;
   
                   if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_FX)
                           lxtphy_set_fx(sc);
                   else
                           lxtphy_set_tp(sc);
   
                   mii_phy_set_media(sc);
                   break;
   
           case MII_TICK:
                   /*
                    * If we're not currently selected, just return.
                    */
                   if (IFM_INST(ife->ifm_media) != sc->mii_inst)
                           return (0);
   
                   if (mii_phy_tick(sc) == EJUSTRETURN)
                           return (0);
                   break;
           }
   
           /* Update the media status. */
           sc->mii_status(sc);
   
           /* Callback if something changed. */
           mii_phy_update(sc, cmd);
           return (0);
   }
   
   static void
   lxtphy_status(struct mii_softc *sc)
   {
           struct mii_data *mii = sc->mii_pdata;
           struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
           int bmcr, bmsr, csr;
   
           mii->mii_media_status = IFM_AVALID;
           mii->mii_media_active = IFM_ETHER;
   
           /*
            * Get link status from the CSR; we need to read the CSR
            * for media type anyhow, and the link status in the CSR
            * doens't latch, so fewer register reads are required.
            */
           csr = PHY_READ(sc, MII_LXTPHY_CSR);
           if (csr & CSR_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) {
                   bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
                   if ((bmsr & BMSR_ACOMP) == 0) {
                           /* Erg, still trying, I guess... */
                           mii->mii_media_active |= IFM_NONE;
                           return;
                   }
                   if (csr & CSR_SPEED)
                           mii->mii_media_active |= IFM_100_TX;
                   else
                           mii->mii_media_active |= IFM_10_T;
                   if (csr & CSR_DUPLEX)
                           mii->mii_media_active |= IFM_FDX;
           } else
                   mii->mii_media_active = ife->ifm_media;
   }
   
   static void
   lxtphy_set_tp(struct mii_softc *sc)
   {
           int cfg;
   
           cfg = PHY_READ(sc, MII_LXTPHY_CONFIG);
           cfg &= ~CONFIG_100BASEFX;
           PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg);
   }
   
   static void
   lxtphy_set_fx(struct mii_softc *sc)
   {
           int cfg;
   
           cfg = PHY_READ(sc, MII_LXTPHY_CONFIG);
           cfg |= CONFIG_100BASEFX;
           PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg);
   }
   
   static void
   lxtphy_reset(struct mii_softc *sc)
   {
           mii_phy_reset(sc);
   #if 0
           PHY_WRITE(sc, MII_LXTPHY_IER,
                     PHY_READ(sc, MII_LXTPHY_IER) & ~IER_INTEN);
   #endif
   }

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