/* $OpenBSD: mlphy.c,v 1.6 2022/04/06 18:59:29 naddy Exp $ */ /*- * Copyright (c) 1997, 1998, 1999 * Bill Paul ctr.columbia.edu>. 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 Bill Paul. * 4. Neither the name of the author nor the names of any co-contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD * 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) 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, 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. * * 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. */ /* * Micro Linear 6692 PHY * * The Micro Linear 6692 is a strange beast, and dealing with it using * this code framework is tricky. The 6692 is actually a 100Mbps-only * device, which means that a second PHY is required to support 10Mbps * modes. However, even though the 6692 does not support 10Mbps modes, * it can still advertise them when performing autonegotiation. If a * 10Mbps mode is negotiated, we must program the registers of the * companion PHY accordingly in addition to programming the registers * of the 6692. * * This device also does not have vendor/device ID registers. * */ #include #include #include #include #include #include #include #include #include #include #include #define ML_STATE_AUTO_SELF 1 #define ML_STATE_AUTO_OTHER 2 struct mlphy_softc { struct mii_softc ml_mii; struct device *ml_dev; int ml_state; int ml_linked; }; int mlphy_probe(struct device *, void *, void *); void mlphy_attach(struct device *, struct device *, void *); const struct cfattach mlphy_ca = { sizeof(struct mii_softc), mlphy_probe, mlphy_attach, mii_phy_detach }; struct cfdriver mlphy_cd = { NULL, "mlphy", DV_DULL }; void mlphy_reset(struct mii_softc *); int mlphy_service(struct mii_softc *, struct mii_data *, int); void mlphy_status(struct mii_softc *); const struct mii_phy_funcs mlphy_funcs = { mlphy_service, mlphy_status, mlphy_reset, }; int mlphy_probe(struct device *parent, void *match, void *aux) { struct mii_attach_args *ma = aux; /* * Micro Linear PHY reports oui == 0 model == 0 */ if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 || MII_MODEL(ma->mii_id2) != 0) return (0); /* * Make sure the parent is a `tl'. So far, I have only * encountered the 6692 on an Olicom card with a ThunderLAN * controller chip. */ if (strcmp(parent->dv_cfdata->cf_driver->cd_name, "tl") != 0) return (0); return (10); } void mlphy_attach(struct device *parent, struct device *self, void *aux) { struct mlphy_softc *msc = (struct mlphy_softc *)self; struct mii_softc *sc = (struct mii_softc *)self; struct mii_attach_args *ma = aux; struct mii_data *mii = ma->mii_data; printf(": ML6692 100baseTX PHY\n"); sc->mii_inst = mii->mii_instance; sc->mii_phy = ma->mii_phyno; sc->mii_funcs = &mlphy_funcs; sc->mii_pdata = mii; sc->mii_flags = ma->mii_flags; msc->ml_dev = parent; PHY_RESET(sc); sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), MII_MEDIA_100_TX); ma->mii_capmask = ~sc->mii_capabilities; #undef ADD if(sc->mii_capabilities & BMSR_MEDIAMASK) mii_phy_add_media(sc); } int mlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) { struct ifmedia_entry *ife = mii->mii_media.ifm_cur; struct mii_softc *other = NULL; struct mlphy_softc *msc = (struct mlphy_softc *)sc; int other_inst, reg; LIST_FOREACH(other, &mii->mii_phys, mii_list) if (other != sc) break; if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0) return (ENXIO); switch (cmd) { case MII_POLLSTAT: /* * If we're not polling our PHY instance, just return. */ if (IFM_INST(ife->ifm_media) != sc->mii_inst) return (0); 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(ife->ifm_media)) { case IFM_AUTO: msc->ml_state = ML_STATE_AUTO_SELF; if (other != NULL) { mii_phy_reset(other); PHY_WRITE(other, MII_BMCR, BMCR_ISO); } (void)mii_phy_auto(sc, 0); msc->ml_linked = 0; break; case IFM_10_T: /* * For 10baseT modes, reset and program the * companion PHY (of any), then setup ourselves * to match. This will put us in pass-through * mode and let the companion PHY do all the * work. * BMCR data is stored in the ifmedia entry. */ if (other != NULL) { mii_phy_reset(other); PHY_WRITE(other, MII_BMCR, ife->ifm_data); } mii_phy_setmedia(sc); msc->ml_state = 0; break; case IFM_100_TX: /* * For 100baseTX modes, reset and isolate the * companion PHY (if any), then setup ourselves * accordingly. * * BMCR data is stored in the ifmedia entry. */ if (other != NULL) { mii_phy_reset(other); PHY_WRITE(other, MII_BMCR, BMCR_ISO); } mii_phy_setmedia(sc); msc->ml_state = 0; break; default: return (EINVAL); } break; case MII_TICK: /* * If interface is not up, don't do anything */ if ((mii->mii_ifp->if_flags & IFF_UP) == 0) return (0); /* * Only used for autonegotiation. */ if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) break; /* * Check to see if we have link. If we do, we don't * need to restart the autonegotiation process. Read * the BMSR twice in case it's latched. * If we're in a 10Mbps mode, check the link of the * 10Mbps PHY. Sometimes the Micro Linear PHY's * linkstat bit will clear while the linkstat bit of * the companion PHY will remain set. */ if (msc->ml_state == ML_STATE_AUTO_OTHER) { reg = PHY_READ(other, MII_BMSR) | PHY_READ(other, MII_BMSR); } else { reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); } if (reg & BMSR_LINK) { if (!msc->ml_linked) { msc->ml_linked = 1; mlphy_status(sc); } sc->mii_ticks = 0; break; } /* * Only retry autonegotiation every 5 seconds. */ if (++sc->mii_ticks <= MII_ANEGTICKS) break; sc->mii_ticks = 0; msc->ml_linked = 0; mii->mii_media_active = IFM_NONE; mii_phy_reset(sc); msc->ml_state = ML_STATE_AUTO_SELF; if (other != NULL) { mii_phy_reset(other); PHY_WRITE(other, MII_BMCR, BMCR_ISO); } mii_phy_auto(sc, 0); break; case MII_DOWN: mii_phy_down(sc); return (0); } /* Update the media status. */ if (msc->ml_state == ML_STATE_AUTO_OTHER && other != NULL) { other_inst = other->mii_inst; other->mii_inst = sc->mii_inst; if (IFM_INST(ife->ifm_media) == other->mii_inst) (void) PHY_SERVICE(other, mii, MII_POLLSTAT); other->mii_inst = other_inst; sc->mii_media_active = other->mii_media_active; sc->mii_media_status = other->mii_media_status; } else ukphy_status(sc); /* Callback if something changed. */ mii_phy_update(sc, cmd); return (0); } void mlphy_reset(struct mii_softc *sc) { int reg; mii_phy_reset(sc); reg = PHY_READ(sc, MII_BMCR); reg &= ~BMCR_AUTOEN; PHY_WRITE(sc, MII_BMCR, reg); } /* * If we negotiate a 10Mbps mode, we need to check for an alternate * PHY and make sure it's enabled and set correctly. */ void mlphy_status(struct mii_softc *sc) { struct mlphy_softc *msc = (struct mlphy_softc *)sc; struct mii_data *mii = sc->mii_pdata; struct mii_softc *other = NULL; /* See if there's another PHY on the bus with us. */ LIST_FOREACH(other, &mii->mii_phys, mii_list) if (other != sc) break; ukphy_status(sc); if (IFM_SUBTYPE(mii->mii_media_active) != IFM_10_T) { msc->ml_state = ML_STATE_AUTO_SELF; if (other != NULL) { mii_phy_reset(other); PHY_WRITE(other, MII_BMCR, BMCR_ISO); } } if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T) { msc->ml_state = ML_STATE_AUTO_OTHER; mlphy_reset(&msc->ml_mii); PHY_WRITE(&msc->ml_mii, MII_BMCR, BMCR_ISO); if (other != NULL) { mii_phy_reset(other); mii_phy_auto(other, 1); } } }