431 lines
10 KiB
C
431 lines
10 KiB
C
/* $NetBSD: mii_physubr.c,v 1.20 2001/04/13 23:30:09 thorpej Exp $ */
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/*-
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* Copyright (c) 1998, 1999, 2000 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/device.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/proc.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <net/route.h>
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#include <dev/mii/mii.h>
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#include <dev/mii/miivar.h>
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/*
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* Media to register setting conversion table. Order matters.
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*/
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const struct mii_media mii_media_table[] = {
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{ BMCR_ISO, ANAR_CSMA }, /* None */
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{ 0, ANAR_CSMA|ANAR_10 }, /* 10baseT */
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{ BMCR_FDX, ANAR_CSMA|ANAR_10_FD }, /* 10baseT-FDX */
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{ BMCR_S100, ANAR_CSMA|ANAR_T4 }, /* 100baseT4 */
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{ BMCR_S100, ANAR_CSMA|ANAR_TX }, /* 100baseTX */
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{ BMCR_S100|BMCR_FDX, ANAR_CSMA|ANAR_TX_FD }, /* 100baseTX-FDX */
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};
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void mii_phy_auto_timeout __P((void *));
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void
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mii_phy_setmedia(sc)
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struct mii_softc *sc;
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{
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struct mii_data *mii = sc->mii_pdata;
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struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
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int bmcr, anar;
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if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO) {
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if ((PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) == 0)
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(void) mii_phy_auto(sc, 1);
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return;
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}
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/*
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* Table index is stored in the media entry.
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*/
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#ifdef DIAGNOSTIC
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if (ife->ifm_data < 0 || ife->ifm_data >= MII_NMEDIA)
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panic("mii_phy_setmedia");
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#endif
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anar = mii_media_table[ife->ifm_data].mm_anar;
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bmcr = mii_media_table[ife->ifm_data].mm_bmcr;
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if (ife->ifm_media & IFM_LOOP)
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bmcr |= BMCR_LOOP;
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PHY_WRITE(sc, MII_ANAR, anar);
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PHY_WRITE(sc, MII_BMCR, bmcr);
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}
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int
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mii_phy_auto(sc, waitfor)
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struct mii_softc *sc;
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int waitfor;
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{
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int bmsr, i;
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if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) {
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PHY_WRITE(sc, MII_ANAR,
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BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA);
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PHY_WRITE(sc, 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(sc, MII_BMSR)) & BMSR_ACOMP)
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return (0);
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delay(1000);
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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 (sc->mii_flags & MIIF_AUTOTSLEEP) {
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sc->mii_flags |= MIIF_DOINGAUTO;
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tsleep(&sc->mii_flags, PZERO, "miiaut", hz >> 1);
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mii_phy_auto_timeout(sc);
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} else if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) {
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sc->mii_flags |= MIIF_DOINGAUTO;
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callout_reset(&sc->mii_nway_ch, hz >> 1,
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mii_phy_auto_timeout, sc);
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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_timeout(arg)
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void *arg;
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{
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struct mii_softc *sc = arg;
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int s, bmsr;
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if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
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return;
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s = splnet();
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sc->mii_flags &= ~MIIF_DOINGAUTO;
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bmsr = PHY_READ(sc, MII_BMSR);
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/* Update the media status. */
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(void) PHY_SERVICE(sc, sc->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 mii_data *mii = sc->mii_pdata;
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struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
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int reg;
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/* Just bail now if the interface is down. */
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if ((mii->mii_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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/* Read the status register twice; BMSR_LINK is latch-low. */
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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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/*
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* See above.
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*/
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return (0);
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}
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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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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(sc)
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struct mii_softc *sc;
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{
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int reg, i;
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if (sc->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(sc, 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(sc, 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 (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0))
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PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
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}
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void
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mii_phy_down(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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callout_stop(&sc->mii_nway_ch);
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}
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}
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void
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mii_phy_status(sc)
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struct mii_softc *sc;
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{
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PHY_STATUS(sc);
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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_media_active != mii->mii_media_active ||
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sc->mii_media_status != mii->mii_media_status ||
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cmd == MII_MEDIACHG) {
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(*mii->mii_statchg)(sc->mii_dev.dv_parent);
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mii_phy_statusmsg(sc);
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sc->mii_media_active = mii->mii_media_active;
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sc->mii_media_status = mii->mii_media_status;
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}
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}
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void
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mii_phy_statusmsg(sc)
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struct mii_softc *sc;
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{
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struct mii_data *mii = sc->mii_pdata;
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struct ifnet *ifp = mii->mii_ifp;
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int s, baudrate, link_state, announce = 0;
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if (mii->mii_media_status & IFM_AVALID) {
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if (mii->mii_media_status & IFM_ACTIVE)
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link_state = LINK_STATE_UP;
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else
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link_state = LINK_STATE_DOWN;
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} else
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link_state = LINK_STATE_UNKNOWN;
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baudrate = ifmedia_baudrate(mii->mii_media_active);
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if (link_state != ifp->if_link_state) {
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ifp->if_link_state = link_state;
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/*
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* XXX Right here we'd like to notify protocols
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* XXX that the link status has changed, so that
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* XXX e.g. Duplicate Address Detection can restart.
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*/
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announce = 1;
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}
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if (baudrate != ifp->if_baudrate) {
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ifp->if_baudrate = baudrate;
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announce = 1;
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}
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if (announce) {
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s = splnet();
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rt_ifmsg(ifp);
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splx(s);
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}
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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_phy_add_media(sc)
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struct mii_softc *sc;
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{
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struct mii_data *mii = sc->mii_pdata;
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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 ((sc->mii_flags & MIIF_NOISOLATE) == 0)
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
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MII_MEDIA_NONE);
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if (sc->mii_capabilities & BMSR_10THDX) {
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst),
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MII_MEDIA_10_T);
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#if 0
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if ((sc->mii_flags & MIIF_NOLOOP) == 0)
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_LOOP,
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sc->mii_inst), MII_MEDIA_10_T);
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#endif
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PRINT("10baseT");
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}
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if (sc->mii_capabilities & BMSR_10TFDX) {
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst),
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MII_MEDIA_10_T_FDX);
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PRINT("10baseT-FDX");
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}
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if (sc->mii_capabilities & BMSR_100TXHDX) {
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst),
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MII_MEDIA_100_TX);
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#if 0
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if ((sc->mii_flags & MIIF_NOLOOP) == 0)
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP,
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sc->mii_inst), MII_MEDIA_100_TX);
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#endif
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PRINT("100baseTX");
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}
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if (sc->mii_capabilities & BMSR_100TXFDX) {
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst),
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MII_MEDIA_100_TX_FDX);
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PRINT("100baseTX-FDX");
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}
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if (sc->mii_capabilities & BMSR_100T4) {
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, sc->mii_inst),
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MII_MEDIA_100_T4);
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#if 0
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if ((sc->mii_flags & MIIF_NOLOOP) == 0)
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, IFM_LOOP,
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sc->mii_inst), MII_MEDIA_100_T4);
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#endif
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PRINT("100baseT4");
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}
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if (sc->mii_capabilities & BMSR_ANEG) {
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst),
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MII_NMEDIA); /* intentionally invalid index */
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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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void
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mii_phy_delete_media(sc)
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struct mii_softc *sc;
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{
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struct mii_data *mii = sc->mii_pdata;
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ifmedia_delete_instance(&mii->mii_media, sc->mii_inst);
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}
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int
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mii_phy_activate(self, act)
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struct device *self;
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enum devact act;
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{
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int rv = 0;
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switch (act) {
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case DVACT_ACTIVATE:
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rv = EOPNOTSUPP;
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break;
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case DVACT_DEACTIVATE:
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/* Nothing special to do. */
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break;
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}
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return (rv);
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}
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int
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mii_phy_detach(self, flags)
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struct device *self;
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int flags;
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{
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struct mii_softc *sc = (void *) self;
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if (sc->mii_flags & MIIF_DOINGAUTO)
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callout_stop(&sc->mii_nway_ch);
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mii_phy_delete_media(sc);
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return (0);
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}
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