FreeBSD/Linux Kernel Cross Reference
sys/dev/dc/pnphy.c

     /*
      * Copyright (c) 1997, 1998, 1999
      *      Bill Paul <wpaul@ee.columbia.edu>.  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 Bill Paul.
     * 4. Neither the name of the author nor the names of any co-contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
     * 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: releng/11.2/sys/dev/dc/pnphy.c 331722 2018-03-29 02:50:57Z eadler $");
    
    /*
     * Pseudo-driver for media selection on the Lite-On PNIC 82c168
     * chip.  The NWAY support on this chip is horribly broken, so we
     * only support manual mode selection.  This is lame, but getting
     * NWAY to work right is amazingly difficult.
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/socket.h>
    #include <sys/errno.h>
    #include <sys/lock.h>
    #include <sys/module.h>
    #include <sys/mutex.h>
    #include <sys/bus.h>
    
    #include <net/if.h>
    #include <net/if_var.h>
    #include <net/if_arp.h>
    #include <net/if_media.h>
    
    #include <dev/mii/mii.h>
    #include <dev/mii/miivar.h>
    #include "miidevs.h"
    
    #include <machine/bus.h>
    #include <machine/resource.h>
    
    #include <dev/dc/if_dcreg.h>
    
    #include "miibus_if.h"
    
    static int pnphy_probe(device_t);
    static int pnphy_attach(device_t);
    
    static device_method_t pnphy_methods[] = {
            /* device interface */
            DEVMETHOD(device_probe,         pnphy_probe),
            DEVMETHOD(device_attach,        pnphy_attach),
            DEVMETHOD(device_detach,        mii_phy_detach),
            DEVMETHOD(device_shutdown,      bus_generic_shutdown),
            DEVMETHOD_END
    };
    
    static devclass_t pnphy_devclass;
    
    static driver_t pnphy_driver = {
            "pnphy",
            pnphy_methods,
            sizeof(struct mii_softc)
    };
    
    DRIVER_MODULE(pnphy, miibus, pnphy_driver, pnphy_devclass, 0, 0);
    
    static int      pnphy_service(struct mii_softc *, struct mii_data *, int);
    static void     pnphy_status(struct mii_softc *);
    static void     pnphy_reset(struct mii_softc *);
    
    static const struct mii_phy_funcs pnphy_funcs = {
            pnphy_service,
            pnphy_status,
            pnphy_reset
    };
   
   static int
   pnphy_probe(device_t dev)
   {
           struct mii_attach_args *ma;
   
           ma = device_get_ivars(dev);
   
           /*
            * The dc driver will report the 82c168 vendor and device
            * ID to let us know that it wants us to attach.
            */
           if (ma->mii_id1 != DC_VENDORID_LO ||
               ma->mii_id2 != DC_DEVICEID_82C168)
                   return (ENXIO);
   
           device_set_desc(dev, "PNIC 82c168 media interface");
   
           return (BUS_PROBE_DEFAULT);
   }
   
   static int
   pnphy_attach(device_t dev)
   {
           struct mii_softc *sc;
   
           sc = device_get_softc(dev);
   
           mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
               &pnphy_funcs, 0);
   
           sc->mii_capabilities =
               BMSR_100TXFDX | BMSR_100TXHDX | BMSR_10TFDX | BMSR_10THDX;
           sc->mii_capabilities &= sc->mii_capmask;
           device_printf(dev, " ");
           mii_phy_add_media(sc);
           printf("\n");
   
           MIIBUS_MEDIAINIT(sc->mii_dev);
           return (0);
   }
   
   static int
   pnphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
   {
           struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
   
           switch (cmd) {
           case MII_POLLSTAT:
                   break;
   
           case MII_MEDIACHG:
                   /*
                    * If the interface is not up, don't do anything.
                    */
                   if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0)
                           break;
   
                   /*
                    * Note that auto-negotiation is broken on this chip.
                    */
                   switch (IFM_SUBTYPE(ife->ifm_media)) {
                   case IFM_100_TX:
                           mii->mii_media_active = IFM_ETHER | IFM_100_TX;
                           if ((ife->ifm_media & IFM_FDX) != 0)
                                   mii->mii_media_active |= IFM_FDX;
                           MIIBUS_STATCHG(sc->mii_dev);
                           return (0);
                   case IFM_10_T:
                           mii->mii_media_active = IFM_ETHER | IFM_10_T;
                           if ((ife->ifm_media & IFM_FDX) != 0)
                                   mii->mii_media_active |= IFM_FDX;
                           MIIBUS_STATCHG(sc->mii_dev);
                           return (0);
                   default:
                           return (EINVAL);
                   }
                   break;
   
           case MII_TICK:
                   /*
                    * Is the interface even up?
                    */
                   if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0)
                           return (0);
   
                   break;
           }
   
           /* Update the media status. */
           PHY_STATUS(sc);
   
           /* Callback if something changed. */
           mii_phy_update(sc, cmd);
           return (0);
   }
   
   static void
   pnphy_status(struct mii_softc *sc)
   {
           struct mii_data *mii = sc->mii_pdata;
           int reg;
           struct dc_softc         *dc_sc;
   
           dc_sc = if_getsoftc(mii->mii_ifp);
   
           mii->mii_media_status = IFM_AVALID;
           mii->mii_media_active = IFM_ETHER;
   
           reg = CSR_READ_4(dc_sc, DC_ISR);
           if (!(reg & DC_ISR_LINKFAIL))
                   mii->mii_media_status |= IFM_ACTIVE;
           reg = CSR_READ_4(dc_sc, DC_NETCFG);
           if (reg & DC_NETCFG_SPEEDSEL)
                   mii->mii_media_active |= IFM_10_T;
           else
                   mii->mii_media_active |= IFM_100_TX;
           if (reg & DC_NETCFG_FULLDUPLEX)
                   mii->mii_media_active |= IFM_FDX;
           else
                   mii->mii_media_active |= IFM_HDX;
   }
   
   static void
   pnphy_reset(struct mii_softc *sc __unused)
   {
   
   }

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