/*      $NetBSD: bmtphy.c,v 1.37 2020/03/15 23:04:50 thorpej Exp $      */

/*-
* 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 the Broadcom BCM5201/BCM5202 "Mini-Theta" PHYs.  This also
* drives the PHY on the 3Com 3c905C.  The 3c905C's PHY is described in
* the 3c905C data sheet.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: bmtphy.c,v 1.37 2020/03/15 23:04:50 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <sys/errno.h>

#include <net/if.h>
#include <net/if_media.h>

#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/mii/miidevs.h>

#include <dev/mii/bmtphyreg.h>

static int      bmtphymatch(device_t, cfdata_t, void *);
static void     bmtphyattach(device_t, device_t, void *);

CFATTACH_DECL_NEW(bmtphy, sizeof(struct mii_softc),
   bmtphymatch, bmtphyattach, mii_phy_detach, mii_phy_activate);

static int      bmtphy_service(struct mii_softc *, struct mii_data *, int);
static void     bmtphy_status(struct mii_softc *);
static void     bmtphy_reset(struct mii_softc *);

static const struct mii_phy_funcs bmtphy_funcs = {
       bmtphy_service, bmtphy_status, bmtphy_reset,
};

static const struct mii_phydesc bmtphys[] = {
       MII_PHY_DESC(xxBROADCOM, 3C905B),
       MII_PHY_DESC(xxBROADCOM, 3C905C),
       MII_PHY_DESC(xxBROADCOM, BCM5201),
       MII_PHY_DESC(xxBROADCOM, BCM5214),
       MII_PHY_DESC(xxBROADCOM, BCM5221),
       MII_PHY_DESC(xxBROADCOM, BCM5222),
       MII_PHY_DESC(xxBROADCOM, BCM4401),
       MII_PHY_END,
};

static int
bmtphymatch(device_t parent, cfdata_t match, void *aux)
{
       struct mii_attach_args *ma = aux;

       if (mii_phy_match(ma, bmtphys) != NULL)
               return 10;

       return 0;
}

static void
bmtphyattach(device_t parent, device_t self, void *aux)
{
       struct mii_softc *sc = device_private(self);
       struct mii_attach_args *ma = aux;
       struct mii_data *mii = ma->mii_data;
       const struct mii_phydesc *mpd;

       mpd = mii_phy_match(ma, bmtphys);
       aprint_naive(": Media interface\n");
       aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));

       sc->mii_dev = self;
       sc->mii_mpd_model = MII_MODEL(ma->mii_id2);
       sc->mii_inst = mii->mii_instance;
       sc->mii_phy = ma->mii_phyno;
       sc->mii_funcs = &bmtphy_funcs;
       sc->mii_pdata = mii;
       sc->mii_flags = ma->mii_flags;

       mii_lock(mii);

       PHY_RESET(sc);

       /* XXX Check AUX_STS_FX_MODE to set MIIF_HAVE_FIBER? */

       PHY_READ(sc, MII_BMSR, &sc->mii_capabilities);
       sc->mii_capabilities &= ma->mii_capmask;

       mii_unlock(mii);

       mii_phy_add_media(sc);
}

static int
bmtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
       struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
       uint16_t reg;

       KASSERT(mii_locked(mii));

       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) {
                       PHY_READ(sc, MII_BMCR, &reg);
                       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;

               mii_phy_setmedia(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;

       case MII_DOWN:
               mii_phy_down(sc);
               return 0;
       }

       /* Update the media status. */
       mii_phy_status(sc);

       /* Callback if something changed. */
       mii_phy_update(sc, cmd);
       return 0;
}

static void
bmtphy_status(struct mii_softc *sc)
{
       struct mii_data *mii = sc->mii_pdata;
       struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
       uint16_t bmsr, bmcr, aux_csr;

       KASSERT(mii_locked(mii));

       mii->mii_media_status = IFM_AVALID;
       mii->mii_media_active = IFM_ETHER;

       PHY_READ(sc, MII_BMSR, &bmsr);
       PHY_READ(sc, MII_BMSR, &bmsr);

       if (bmsr & BMSR_LINK)
               mii->mii_media_status |= IFM_ACTIVE;

       PHY_READ(sc, MII_BMCR, &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;
               }

               PHY_READ(sc, MII_BMTPHY_AUX_CSR, &aux_csr);
               if (aux_csr & AUX_CSR_SPEED)
                       mii->mii_media_active |= IFM_100_TX;
               else
                       mii->mii_media_active |= IFM_10_T;
               if (aux_csr & AUX_CSR_FDX)
                       mii->mii_media_active |= IFM_FDX;
               else
                       mii->mii_media_active |= IFM_HDX;

               if (mii->mii_media_active & IFM_FDX)
                       mii->mii_media_active |= mii_phy_flowstatus(sc);
       } else
               mii->mii_media_active = ife->ifm_media;
}

static void
bmtphy_reset(struct mii_softc *sc)
{
       uint16_t data;

       KASSERT(mii_locked(sc->mii_pdata));

       mii_phy_reset(sc);

       if (sc->mii_mpd_model == MII_MODEL_xxBROADCOM_BCM5221) {
               /* Enable shadow register mode */
               PHY_READ(sc, 0x1f, &data);
               PHY_WRITE(sc, 0x1f, data | 0x0080);

               /* Enable APD (Auto PowerDetect) */
               PHY_READ(sc, MII_BMTPHY_AUX2, &data);
               PHY_WRITE(sc, MII_BMTPHY_AUX2, data | 0x0020);

               /* Enable clocks across APD for Auto-MDIX functionality */
               PHY_READ(sc, MII_BMTPHY_INTR, &data);
               PHY_WRITE(sc, MII_BMTPHY_INTR, data | 0x0004);

               /* Disable shadow register mode */
               PHY_READ(sc, 0x1f, &data);
               PHY_WRITE(sc, 0x1f, data & ~0x0080);
       }
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.