/* $NetBSD: exphy.c,v 1.4 1998/08/12 22:27:42 thorpej Exp $ */ /*- * Copyright (c) 1998 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, and by Frank van der Linden. * * 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. */ /* * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Manuel Bouyer. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * 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 3Com internal PHYs */ #include #include #include #include #include #include #include #include #include #include #include struct exphy_softc { struct mii_softc sc_mii; /* generic PHY */ int sc_capabilities; int sc_active; }; int exphymatch __P((struct device *, struct cfdata *, void *)); void exphyattach __P((struct device *, struct device *, void *)); struct cfattach exphy_ca = { sizeof(struct exphy_softc), exphymatch, exphyattach }; #define EXPHY_READ(sc, reg) \ (*(sc)->sc_mii.mii_pdata->mii_readreg)((sc)->sc_mii.mii_dev.dv_parent, \ (sc)->sc_mii.mii_phy, (reg)) #define EXPHY_WRITE(sc, reg, val) \ (*(sc)->sc_mii.mii_pdata->mii_writereg)((sc)->sc_mii.mii_dev.dv_parent, \ (sc)->sc_mii.mii_phy, (reg), (val)) int exphy_service __P((struct mii_softc *, struct mii_data *, int)); void exphy_reset __P((struct exphy_softc *)); void exphy_auto __P((struct exphy_softc *)); void exphy_status __P((struct exphy_softc *)); int exphymatch(parent, match, aux) struct device *parent; struct cfdata *match; void *aux; { struct mii_attach_args *ma = aux; /* * Argh, 3Com PHY reports oui == 0 model == 0! */ if (MII_OUI(ma->mii_id1, ma->mii_id2) == 0 && MII_MODEL(ma->mii_id2) == 0) return (1); return (0); } void exphyattach(parent, self, aux) struct device *parent, *self; void *aux; { struct exphy_softc *sc = (struct exphy_softc *)self; struct mii_attach_args *ma = aux; struct mii_data *mii = ma->mii_data; printf(": 3Com internal media interface, rev. %d\n", MII_REV(ma->mii_id2)); sc->sc_mii.mii_inst = mii->mii_instance; sc->sc_mii.mii_phy = ma->mii_phyno; sc->sc_mii.mii_service = exphy_service; sc->sc_mii.mii_pdata = mii; /* * The 3Com PHY can never be isolated, so never allow non-zero * instances! */ if (mii->mii_instance != 0) { printf("%s: ignoring this PHY, non-zero instance\n", sc->sc_mii.mii_dev.dv_xname); return; } #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->sc_mii.mii_inst), BMCR_LOOP|BMCR_S100); exphy_reset(sc); sc->sc_capabilities = EXPHY_READ(sc, MII_BMSR) & ma->mii_capmask; printf("%s: ", sc->sc_mii.mii_dev.dv_xname); if ((sc->sc_capabilities & BMSR_MEDIAMASK) == 0) printf("no media present"); else mii_add_media(mii, sc->sc_capabilities, sc->sc_mii.mii_inst); printf("\n"); #undef ADD } int exphy_service(self, mii, cmd) struct mii_softc *self; struct mii_data *mii; int cmd; { struct exphy_softc *sc = (struct exphy_softc *)self; /* * We can't isolate the 3Com PHY, so it has to be the only one! */ if (IFM_INST(mii->mii_media.ifm_media) != sc->sc_mii.mii_inst) panic("exphy_service: can't isolate 3Com PHY"); switch (cmd) { case MII_POLLSTAT: break; case MII_MEDIACHG: /* * If the interface is not up, don't do anything. */ if ((mii->mii_ifp->if_flags & IFF_UP) == 0) break; switch (IFM_SUBTYPE(mii->mii_media.ifm_media)) { case IFM_AUTO: /* * If we're already in auto mode, just return. */ if (EXPHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) return (0); exphy_auto(sc); break; case IFM_100_T4: /* * XXX Not supported as a manual setting right now. */ return (EINVAL); default: /* * BMCR data is stored in the ifmedia entry. */ EXPHY_WRITE(sc, MII_ANAR, mii_anar(mii->mii_media.ifm_media)); EXPHY_WRITE(sc, MII_BMCR, mii->mii_media.ifm_cur->ifm_data); } break; case MII_TICK: /* * Only used for autonegotiation. */ if (IFM_SUBTYPE(mii->mii_media.ifm_media) != IFM_AUTO) return (0); /* * Is the interface even up? */ if ((mii->mii_ifp->if_flags & IFF_UP) == 0) return (0); /* * The 3Com PHY's autonegotiation doesn't need to be * kicked; it continues in the background. */ break; } /* Update the media status. */ exphy_status(sc); /* Callback if something changed. */ if (sc->sc_active != mii->mii_media_active || cmd == MII_MEDIACHG) { (*mii->mii_statchg)(sc->sc_mii.mii_dev.dv_parent); sc->sc_active = mii->mii_media_active; } return (0); } void exphy_status(sc) struct exphy_softc *sc; { struct mii_data *mii = sc->sc_mii.mii_pdata; int bmsr, bmcr, anlpar; mii->mii_media_status = IFM_AVALID; mii->mii_media_active = IFM_ETHER; bmsr = EXPHY_READ(sc, MII_BMSR) | EXPHY_READ(sc, MII_BMSR); if (bmsr & BMSR_LINK) mii->mii_media_status |= IFM_ACTIVE; bmcr = EXPHY_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) { /* * The 3Com PHY uses the highest-order common bit of * the ANAR and ANLPAR (i.e. best media advertised * both by us and our link partner). */ if ((bmsr & BMSR_ACOMP) == 0) { /* Erg, still trying, I guess... */ mii->mii_media_active |= IFM_NONE; return; } anlpar = EXPHY_READ(sc, MII_ANAR) & EXPHY_READ(sc, MII_ANLPAR); if (anlpar & ANLPAR_T4) mii->mii_media_active |= IFM_100_T4; else if (anlpar & ANLPAR_TX_FD) mii->mii_media_active |= IFM_100_TX|IFM_FDX; else if (anlpar & ANLPAR_TX) mii->mii_media_active |= IFM_100_TX; else if (anlpar & ANLPAR_10_FD) mii->mii_media_active |= IFM_10_T|IFM_FDX; else if (anlpar & ANLPAR_10) mii->mii_media_active |= IFM_10_T; else mii->mii_media_active |= IFM_NONE; } else { if (bmcr & BMCR_S100) mii->mii_media_active |= IFM_100_TX; else mii->mii_media_active |= IFM_10_T; if (bmcr & BMCR_FDX) mii->mii_media_active |= IFM_FDX; } } void exphy_auto(sc) struct exphy_softc *sc; { int bmsr, i; EXPHY_WRITE(sc, MII_ANAR, BMSR_MEDIA_TO_ANAR(sc->sc_capabilities) | ANAR_CSMA); EXPHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); /* Wait 500ms for it to complete. */ for (i = 0; i < 500; i++) { if ((bmsr = EXPHY_READ(sc, MII_BMSR)) & BMSR_ACOMP) return; delay(1000); } #if 0 if ((bmsr & BMSR_ACOMP) == 0) printf("%s: autonegotiation failed to complete\n", sc->sc_mii.mii_dev.dv_xname); #endif } void exphy_reset(sc) struct exphy_softc *sc; { int reg, i; EXPHY_WRITE(sc, MII_BMCR, BMCR_RESET); /* Wait 100ms for it to complete. */ for (i = 0; i < 100; i++) { reg = EXPHY_READ(sc, MII_BMCR); if ((reg & BMCR_RESET) == 0) break; delay(1000); } /* * XXX 3Com PHY doesn't set the BMCR properly after * XXX reset, which breaks autonegotiation. */ EXPHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_AUTOEN|BMCR_FDX); }