340 lines
8.1 KiB
C
340 lines
8.1 KiB
C
/* $NetBSD: mii_physubr.c,v 1.5 1999/08/03 19:41:49 drochner Exp $ */
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/*-
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* Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Subroutines common to all PHYs.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/errno.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <dev/mii/mii.h>
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#include <dev/mii/miivar.h>
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#include "miibus_if.h"
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#if !defined(lint)
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static const char rcsid[] =
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"$FreeBSD$";
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#endif
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void mii_phy_auto_timeout(void *);
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int
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mii_phy_auto(mii, waitfor)
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struct mii_softc *mii;
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int waitfor;
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{
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int bmsr, i;
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if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) {
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PHY_WRITE(mii, MII_ANAR,
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BMSR_MEDIA_TO_ANAR(mii->mii_capabilities) | ANAR_CSMA);
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PHY_WRITE(mii, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
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}
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if (waitfor) {
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/* Wait 500ms for it to complete. */
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for (i = 0; i < 500; i++) {
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if ((bmsr = PHY_READ(mii, MII_BMSR)) & BMSR_ACOMP)
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return (0);
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DELAY(1000);
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#if 0
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if ((bmsr & BMSR_ACOMP) == 0)
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printf("%s: autonegotiation failed to complete\n",
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mii->mii_dev.dv_xname);
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#endif
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}
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/*
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* Don't need to worry about clearing MIIF_DOINGAUTO.
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* If that's set, a timeout is pending, and it will
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* clear the flag.
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*/
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return (EIO);
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}
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/*
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* Just let it finish asynchronously. This is for the benefit of
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* the tick handler driving autonegotiation. Don't want 500ms
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* delays all the time while the system is running!
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*/
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if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) {
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mii->mii_flags |= MIIF_DOINGAUTO;
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mii->mii_auto_ch = timeout(mii_phy_auto_timeout, mii, hz >> 1);
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}
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return (EJUSTRETURN);
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}
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void
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mii_phy_auto_stop(sc)
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struct mii_softc *sc;
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{
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if (sc->mii_flags & MIIF_DOINGAUTO) {
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sc->mii_flags &= ~MIIF_DOINGAUTO;
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untimeout(mii_phy_auto_timeout, sc, sc->mii_auto_ch);
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}
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}
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void
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mii_phy_auto_timeout(arg)
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void *arg;
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{
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struct mii_softc *mii = arg;
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int s, bmsr;
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s = splnet();
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mii->mii_flags &= ~MIIF_DOINGAUTO;
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bmsr = PHY_READ(mii, MII_BMSR);
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#if 0
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if ((bmsr & BMSR_ACOMP) == 0)
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printf("%s: autonegotiation failed to complete\n",
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sc->sc_dev.dv_xname);
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#endif
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/* Update the media status. */
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(void) (*mii->mii_service)(mii, mii->mii_pdata, MII_POLLSTAT);
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splx(s);
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}
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int
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mii_phy_tick(sc)
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struct mii_softc *sc;
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{
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struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur;
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struct ifnet *ifp = sc->mii_pdata->mii_ifp;
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int reg;
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/*
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* Is the interface even up?
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*/
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if ((ifp->if_flags & IFF_UP) == 0)
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return (EJUSTRETURN);
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/*
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* If we're not doing autonegotiation, we don't need to do
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* any extra work here. However, we need to check the link
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* status so we can generate an announcement if the status
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* changes.
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*/
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if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
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return (0);
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/*
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* check for link.
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* Read the status register twice; BMSR_LINK is latch-low.
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*/
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reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
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if (reg & BMSR_LINK)
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return (0);
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/*
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* Only retry autonegotiation every 5 seconds.
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*/
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if (++sc->mii_ticks != 5)
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return (EJUSTRETURN);
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sc->mii_ticks = 0;
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mii_phy_reset(sc);
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if (mii_phy_auto(sc, 0) == EJUSTRETURN)
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return (EJUSTRETURN);
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/*
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* Might need to generate a status message if autonegotiation
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* failed.
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*/
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return (0);
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}
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void
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mii_phy_reset(mii)
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struct mii_softc *mii;
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{
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int reg, i;
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if (mii->mii_flags & MIIF_NOISOLATE)
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reg = BMCR_RESET;
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else
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reg = BMCR_RESET | BMCR_ISO;
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PHY_WRITE(mii, MII_BMCR, reg);
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/* Wait 100ms for it to complete. */
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for (i = 0; i < 100; i++) {
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reg = PHY_READ(mii, MII_BMCR);
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if ((reg & BMCR_RESET) == 0)
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break;
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DELAY(1000);
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}
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if (mii->mii_inst != 0 && ((mii->mii_flags & MIIF_NOISOLATE) == 0))
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PHY_WRITE(mii, MII_BMCR, reg | BMCR_ISO);
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}
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void
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mii_phy_update(sc, cmd)
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struct mii_softc *sc;
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int cmd;
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{
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struct mii_data *mii = sc->mii_pdata;
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if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) {
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MIIBUS_STATCHG(sc->mii_dev);
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sc->mii_active = mii->mii_media_active;
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}
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if (sc->mii_status != mii->mii_media_status) {
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MIIBUS_LINKCHG(sc->mii_dev);
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sc->mii_status = mii->mii_media_status;
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}
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}
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/*
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* Given an ifmedia word, return the corresponding ANAR value.
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*/
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int
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mii_anar(media)
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int media;
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{
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int rv;
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switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) {
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case IFM_ETHER|IFM_10_T:
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rv = ANAR_10|ANAR_CSMA;
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break;
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case IFM_ETHER|IFM_10_T|IFM_FDX:
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rv = ANAR_10_FD|ANAR_CSMA;
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break;
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case IFM_ETHER|IFM_100_TX:
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rv = ANAR_TX|ANAR_CSMA;
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break;
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case IFM_ETHER|IFM_100_TX|IFM_FDX:
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rv = ANAR_TX_FD|ANAR_CSMA;
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break;
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case IFM_ETHER|IFM_100_T4:
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rv = ANAR_T4|ANAR_CSMA;
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break;
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default:
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rv = 0;
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break;
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}
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return (rv);
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}
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/*
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* Given a BMCR value, return the corresponding ifmedia word.
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*/
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int
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mii_media_from_bmcr(bmcr)
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int bmcr;
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{
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int rv = IFM_ETHER;
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if (bmcr & BMCR_S100)
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rv |= IFM_100_TX;
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else
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rv |= IFM_10_T;
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if (bmcr & BMCR_FDX)
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rv |= IFM_FDX;
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return (rv);
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}
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/*
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* Initialize generic PHY media based on BMSR, called when a PHY is
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* attached. We expect to be set up to print a comma-separated list
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* of media names. Does not print a newline.
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*/
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void
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mii_add_media(mii, bmsr, instance)
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struct mii_data *mii;
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int bmsr, instance;
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{
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const char *sep = "";
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#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
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#define PRINT(s) printf("%s%s", sep, s); sep = ", "
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if (bmsr & BMSR_10THDX) {
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, instance), 0);
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PRINT("10baseT");
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}
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if (bmsr & BMSR_10TFDX) {
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, instance),
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BMCR_FDX);
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PRINT("10baseT-FDX");
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}
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if (bmsr & BMSR_100TXHDX) {
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, instance),
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BMCR_S100);
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PRINT("100baseTX");
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}
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if (bmsr & BMSR_100TXFDX) {
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, instance),
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BMCR_S100|BMCR_FDX);
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PRINT("100baseTX-FDX");
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}
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if (bmsr & BMSR_100T4) {
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/*
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* XXX How do you enable 100baseT4? I assume we set
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* XXX BMCR_S100 and then assume the PHYs will take
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* XXX watever action is necessary to switch themselves
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* XXX into T4 mode.
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*/
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, instance),
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BMCR_S100);
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PRINT("100baseT4");
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}
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if (bmsr & BMSR_ANEG) {
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, instance),
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BMCR_AUTOEN);
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PRINT("auto");
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}
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#undef ADD
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#undef PRINT
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}
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