/* $NetBSD: mii_physubr.c,v 1.5 1999/08/03 19:41:49 drochner Exp $ */ /*- * Copyright (c) 1998, 1999 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * 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. */ /* * Subroutines common to all PHYs. */ #include #include #include #include #include #include #include #include #include #include #include #include "miibus_if.h" #if !defined(lint) static const char rcsid[] = "$FreeBSD$"; #endif void mii_phy_auto_timeout(void *); int mii_phy_auto(mii, waitfor) struct mii_softc *mii; int waitfor; { int bmsr, i; if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { PHY_WRITE(mii, MII_ANAR, BMSR_MEDIA_TO_ANAR(mii->mii_capabilities) | ANAR_CSMA); PHY_WRITE(mii, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); } if (waitfor) { /* Wait 500ms for it to complete. */ for (i = 0; i < 500; i++) { if ((bmsr = PHY_READ(mii, MII_BMSR)) & BMSR_ACOMP) return (0); DELAY(1000); #if 0 if ((bmsr & BMSR_ACOMP) == 0) printf("%s: autonegotiation failed to complete\n", mii->mii_dev.dv_xname); #endif } /* * Don't need to worry about clearing MIIF_DOINGAUTO. * If that's set, a timeout is pending, and it will * clear the flag. */ return (EIO); } /* * Just let it finish asynchronously. This is for the benefit of * the tick handler driving autonegotiation. Don't want 500ms * delays all the time while the system is running! */ if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { mii->mii_flags |= MIIF_DOINGAUTO; mii->mii_auto_ch = timeout(mii_phy_auto_timeout, mii, hz >> 1); } return (EJUSTRETURN); } void mii_phy_auto_stop(sc) struct mii_softc *sc; { if (sc->mii_flags & MIIF_DOINGAUTO) { sc->mii_flags &= ~MIIF_DOINGAUTO; untimeout(mii_phy_auto_timeout, sc, sc->mii_auto_ch); } } void mii_phy_auto_timeout(arg) void *arg; { struct mii_softc *mii = arg; int s, bmsr; s = splnet(); mii->mii_flags &= ~MIIF_DOINGAUTO; bmsr = PHY_READ(mii, MII_BMSR); #if 0 if ((bmsr & BMSR_ACOMP) == 0) printf("%s: autonegotiation failed to complete\n", sc->sc_dev.dv_xname); #endif /* Update the media status. */ (void) (*mii->mii_service)(mii, mii->mii_pdata, MII_POLLSTAT); splx(s); } int mii_phy_tick(sc) struct mii_softc *sc; { struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; struct ifnet *ifp = sc->mii_pdata->mii_ifp; int reg; /* * Is the interface even up? */ if ((ifp->if_flags & IFF_UP) == 0) return (EJUSTRETURN); /* * If we're not doing autonegotiation, we don't need to do * any extra work here. However, we need to check the link * status so we can generate an announcement if the status * changes. */ if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) return (0); /* * check for link. * Read the status register twice; BMSR_LINK is latch-low. */ reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); if (reg & BMSR_LINK) return (0); /* * Only retry autonegotiation every 5 seconds. */ if (++sc->mii_ticks != 5) return (EJUSTRETURN); sc->mii_ticks = 0; mii_phy_reset(sc); if (mii_phy_auto(sc, 0) == EJUSTRETURN) return (EJUSTRETURN); /* * Might need to generate a status message if autonegotiation * failed. */ return (0); } void mii_phy_reset(mii) struct mii_softc *mii; { int reg, i; if (mii->mii_flags & MIIF_NOISOLATE) reg = BMCR_RESET; else reg = BMCR_RESET | BMCR_ISO; PHY_WRITE(mii, MII_BMCR, reg); /* Wait 100ms for it to complete. */ for (i = 0; i < 100; i++) { reg = PHY_READ(mii, MII_BMCR); if ((reg & BMCR_RESET) == 0) break; DELAY(1000); } if (mii->mii_inst != 0 && ((mii->mii_flags & MIIF_NOISOLATE) == 0)) PHY_WRITE(mii, MII_BMCR, reg | BMCR_ISO); } void mii_phy_update(sc, cmd) struct mii_softc *sc; int cmd; { struct mii_data *mii = sc->mii_pdata; if (sc->mii_media_active != mii->mii_media_active || cmd == MII_MEDIACHG) { MIIBUS_STATCHG(sc->mii_dev); sc->mii_media_active = mii->mii_media_active; } if (sc->mii_media_status != mii->mii_media_status) { MIIBUS_LINKCHG(sc->mii_dev); sc->mii_media_status = mii->mii_media_status; } } /* * Given an ifmedia word, return the corresponding ANAR value. */ int mii_anar(media) int media; { int rv; switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) { case IFM_ETHER|IFM_10_T: rv = ANAR_10|ANAR_CSMA; break; case IFM_ETHER|IFM_10_T|IFM_FDX: rv = ANAR_10_FD|ANAR_CSMA; break; case IFM_ETHER|IFM_100_TX: rv = ANAR_TX|ANAR_CSMA; break; case IFM_ETHER|IFM_100_TX|IFM_FDX: rv = ANAR_TX_FD|ANAR_CSMA; break; case IFM_ETHER|IFM_100_T4: rv = ANAR_T4|ANAR_CSMA; break; default: rv = 0; break; } return (rv); } /* * Given a BMCR value, return the corresponding ifmedia word. */ int mii_media_from_bmcr(bmcr) int bmcr; { int rv = IFM_ETHER; if (bmcr & BMCR_S100) rv |= IFM_100_TX; else rv |= IFM_10_T; if (bmcr & BMCR_FDX) rv |= IFM_FDX; return (rv); } /* * Initialize generic PHY media based on BMSR, called when a PHY is * attached. We expect to be set up to print a comma-separated list * of media names. Does not print a newline. */ void mii_add_media(struct mii_softc *sc) { const char *sep = ""; int bmsr, instance; struct mii_data *mii; bmsr = sc->mii_capabilities; instance = sc->mii_inst; mii = device_get_softc(sc->mii_dev); if ((bmsr & BMSR_MEDIAMASK) == 0) { printf("no media present"); return; } #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) #define PRINT(s) printf("%s%s", sep, s); sep = ", " if (bmsr & BMSR_10THDX) { ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, instance), 0); PRINT("10baseT"); } if (bmsr & BMSR_10TFDX) { ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, instance), BMCR_FDX); PRINT("10baseT-FDX"); } if (bmsr & BMSR_100TXHDX) { ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, instance), BMCR_S100); PRINT("100baseTX"); } if (bmsr & BMSR_100TXFDX) { ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, instance), BMCR_S100|BMCR_FDX); PRINT("100baseTX-FDX"); } if (bmsr & BMSR_100T4) { /* * XXX How do you enable 100baseT4? I assume we set * XXX BMCR_S100 and then assume the PHYs will take * XXX watever action is necessary to switch themselves * XXX into T4 mode. */ ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, instance), BMCR_S100); PRINT("100baseT4"); } if (bmsr & BMSR_ANEG) { ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, instance), BMCR_AUTOEN); PRINT("auto"); } #undef ADD #undef PRINT }