source: rtems-libbsd/freebsd/sys/dev/mii/icsphy.c @ c40e45b

#include <machine/rtems-bsd-kernel-space.h>

/*      $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.
 *
 * 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.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

/*
 * driver for Integrated Circuit Systems' ICS1889-1893 ethernet 10/100 PHY
 * datasheet from www.icst.com
 */

#include <rtems/bsd/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 <rtems/bsd/local/miidevs.h>

#include <dev/mii/icsphyreg.h>

#include <rtems/bsd/local/miibus_if.h>

static int      icsphy_probe(device_t dev);
static int      icsphy_attach(device_t dev);

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),
        DEVMETHOD_END
};

static devclass_t icsphy_devclass;

static driver_t icsphy_driver = {
        "icsphy",
        icsphy_methods,
        sizeof(struct mii_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(ICS, 1889),
        MII_PHY_DESC(ICS, 1890),
        MII_PHY_DESC(ICS, 1892),
        MII_PHY_DESC(ICS, 1893),
        MII_PHY_END
};

static const struct mii_phy_funcs icsphy_funcs = {
        icsphy_service,
        icsphy_status,
        icsphy_reset
};

static int
icsphy_probe(device_t dev)
{

        return (mii_phy_dev_probe(dev, icsphys, BUS_PROBE_DEFAULT));
}

static int
icsphy_attach(device_t dev)
{

        mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
            &icsphy_funcs, 1);
        return (0);
}

static int
icsphy_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
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 | mii_phy_flowstatus(sc);
                else
                        mii->mii_media_active |= IFM_HDX;
        } else
                mii->mii_media_active = ife->ifm_media;
}

static void
icsphy_reset(struct mii_softc *sc)
{

        mii_phy_reset(sc);
        /* set powerdown feature */
        switch (sc->mii_mpd_model) {
                case MII_MODEL_ICS_1890:
                case MII_MODEL_ICS_1893:
                        PHY_WRITE(sc, MII_ICSPHY_ECR2, ECR2_100AUTOPWRDN);
                        break;
                case MII_MODEL_ICS_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);
}