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

     /*      $NetBSD: icsphy.c,v 1.41 2006/11/16 21:24:07 christos Exp $     */
     
     /*-
      * Copyright (c) 1998, 1999, 2000 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.
     */
    
    /*
     * 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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    /*
     * driver for Integrated Circuit Systems' ICS1889-1893 ethernet 10/100 PHY
     * datasheet from www.icst.com
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/socket.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 <dev/mii/icsphyreg.h>
    
    #include "miibus_if.h"
    
    static int      icsphy_probe(device_t dev);
    static int      icsphy_attach(device_t dev);
    
    struct icsphy_softc {
            struct mii_softc mii_sc;
           int mii_model;
   };
   
   static device_method_t icsphy_methods[] = {
           /* device interface */
           DEVMETHOD(device_probe,         icsphy_probe),
           DEVMETHOD(device_attach,        icsphy_attach),
           DEVMETHOD(device_detach,        mii_phy_detach),
           DEVMETHOD(device_shutdown,      bus_generic_shutdown),
           { 0, 0 }
   };
   
   static devclass_t icsphy_devclass;
   
   static driver_t icsphy_driver = {
           "icsphy",
           icsphy_methods,
           sizeof(struct icsphy_softc)
   };
   
   DRIVER_MODULE(icsphy, miibus, icsphy_driver, icsphy_devclass, 0, 0);
   
   static int      icsphy_service(struct mii_softc *, struct mii_data *, int);
   static void     icsphy_status(struct mii_softc *);
   static void     icsphy_reset(struct mii_softc *);
   
   static const struct mii_phydesc icsphys[] = {
           MII_PHY_DESC(xxICS, 1889),
           MII_PHY_DESC(xxICS, 1890),
           MII_PHY_DESC(xxICS, 1892),
           MII_PHY_DESC(xxICS, 1893),
           MII_PHY_END
   };
   
   static int
   icsphy_probe(device_t dev)
   {
   
           return (mii_phy_dev_probe(dev, icsphys, BUS_PROBE_DEFAULT));
   }
   
   static int
   icsphy_attach(device_t dev)
   {
           struct icsphy_softc *isc;
           struct mii_softc *sc;
           struct mii_attach_args *ma;
           struct mii_data *mii;
   
           isc = device_get_softc(dev);
           sc = &isc->mii_sc;
           ma = device_get_ivars(dev);
           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_phy = ma->mii_phyno;
           sc->mii_service = icsphy_service;
           sc->mii_pdata = mii;
           sc->mii_anegticks = MII_ANEGTICKS;
           sc->mii_flags |= MIIF_NOISOLATE;
   
           mii->mii_instance++;
   
           ifmedia_add(&mii->mii_media,
               IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
               MII_MEDIA_100_TX, NULL);
   
           isc->mii_model = MII_MODEL(ma->mii_id2);
           icsphy_reset(sc);
   
           sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
           device_printf(dev, " ");
           mii_phy_add_media(sc);
           printf("\n");
   
           MIIBUS_MEDIAINIT(sc->mii_dev);
   
           return (0);
   }
   
   static int
   icsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
   {
           struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
           int reg;
   
           /*
            * If we're not selected, then do nothing, just isolate, if
            * changing media.
            */
           if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
                   if (cmd == MII_MEDIACHG) {
                           reg = PHY_READ(sc, MII_BMCR);
                           PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
                   }
                   return (0);
           }
   
           switch (cmd) {
           case MII_POLLSTAT:
                   break;
   
           case MII_MEDIACHG:
                   /*
                    * If the interface is not up, don't do anything.
                    */
                   if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
                           break;
   
                   mii_phy_setmedia(sc);
                   break;
   
           case MII_TICK:
                   if (mii_phy_tick(sc) == EJUSTRETURN)
                           return (0);
                   break;
           }
   
           /* Update the media status. */
           icsphy_status(sc);
   
           /* Callback if something changed. */
           mii_phy_update(sc, cmd);
           return (0);
   }
   
   static void
   icsphy_status(struct mii_softc *sc)
   {
           struct mii_data *mii = sc->mii_pdata;
           struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
           int bmcr, qpr;
   
           mii->mii_media_status = IFM_AVALID;
           mii->mii_media_active = IFM_ETHER;
   
           /*
            * Don't get link from the BMSR.  It's available in the QPR,
            * and we have to read it twice to unlatch it anyhow.  This
            * gives us fewer register reads.
            */
           qpr = PHY_READ(sc, MII_ICSPHY_QPR);             /* unlatch */
           qpr = PHY_READ(sc, MII_ICSPHY_QPR);             /* real value */
   
           if (qpr & QPR_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) {
                   if ((qpr & QPR_ACOMP) == 0) {
                           /* Erg, still trying, I guess... */
                           mii->mii_media_active |= IFM_NONE;
                           return;
                   }
                   if (qpr & QPR_SPEED)
                           mii->mii_media_active |= IFM_100_TX;
                   else
                           mii->mii_media_active |= IFM_10_T;
                   if (qpr & QPR_FDX)
                           mii->mii_media_active |= IFM_FDX;
                   else
                           mii->mii_media_active |= IFM_HDX;
           } else
                   mii->mii_media_active = ife->ifm_media;
   }
   
   static void
   icsphy_reset(struct mii_softc *sc)
   {
           struct icsphy_softc *isc = (struct icsphy_softc *)sc;
   
           mii_phy_reset(sc);
           /* set powerdown feature */
           switch (isc->mii_model) {
                   case MII_MODEL_xxICS_1890:
                   case MII_MODEL_xxICS_1893:
                           PHY_WRITE(sc, MII_ICSPHY_ECR2, ECR2_100AUTOPWRDN);
                           break;
                   case MII_MODEL_xxICS_1892:
                           PHY_WRITE(sc, MII_ICSPHY_ECR2,
                               ECR2_10AUTOPWRDN|ECR2_100AUTOPWRDN);
                           break;
                   default:
                           /* 1889 have no ECR2 */
                           break;
           }
           /*
            * There is no description that the reset do auto-negotiation in the
            * data sheet.
            */
           PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_STARTNEG|BMCR_FDX);
   }

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