/* * Copyright (c) 1997, 1998, 1999 * Bill Paul . 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. * * $FreeBSD: src/sys/dev/mii/mlphy.c,v 1.2.2.3 2001/02/09 09:50:15 asmodai Exp $ */ /* * driver for Micro Linear 6692 PHYs * * 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 #include "mii.h" #include "miivar.h" #include "miibus_if.h" #define ML_STATE_AUTO_SELF 1 #define ML_STATE_AUTO_OTHER 2 struct mlphy_softc { struct mii_softc ml_mii; int ml_state; int ml_linked; }; static int mlphy_probe (device_t); static int mlphy_attach (device_t); static int mlphy_detach (device_t); static device_method_t mlphy_methods[] = { /* device interface */ DEVMETHOD(device_probe, mlphy_probe), DEVMETHOD(device_attach, mlphy_attach), DEVMETHOD(device_detach, mlphy_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD_END }; static devclass_t mlphy_devclass; static driver_t mlphy_driver = { "mlphy", mlphy_methods, sizeof(struct mlphy_softc) }; DRIVER_MODULE(mlphy, miibus, mlphy_driver, mlphy_devclass, NULL, NULL); static int mlphy_service (struct mii_softc *, struct mii_data *, int); static void mlphy_reset (struct mii_softc *); static void mlphy_status (struct mii_softc *); static int mlphy_probe(device_t dev) { struct mii_attach_args *ma; device_t parent; ma = device_get_ivars(dev); parent = device_get_parent(device_get_parent(dev)); /* * 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 (ENXIO); /* * 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(device_get_name(parent), "tl") != 0) return (ENXIO); device_set_desc(dev, "Micro Linear 6692 media interface"); return (0); } static int mlphy_attach(device_t dev) { struct mlphy_softc *msc; struct mii_softc *sc; struct mii_attach_args *ma; struct mii_data *mii; msc = device_get_softc(dev); sc = &msc->ml_mii; ma = device_get_ivars(dev); mii_softc_init(sc, ma); sc->mii_dev = device_get_parent(dev); mii = device_get_softc(sc->mii_dev); LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); sc->mii_inst = mii->mii_instance; sc->mii_service = mlphy_service; sc->mii_reset = mlphy_reset; sc->mii_pdata = mii; mii->mii_instance++; #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) #if 0 /* See above. */ ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), MII_MEDIA_NONE); #endif ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), MII_MEDIA_100_TX); sc->mii_flags &= ~MIIF_NOISOLATE; mii_phy_reset(sc); sc->mii_flags |= MIIF_NOISOLATE; sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; device_printf(dev, " "); if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) kprintf("no media present"); else mii_phy_add_media(sc); kprintf("\n"); #undef ADD MIIBUS_MEDIAINIT(sc->mii_dev); return(0); } static int mlphy_detach(device_t dev) { struct mlphy_softc *sc; sc = device_get_softc(dev); sc->ml_mii.mii_dev = NULL; LIST_REMOVE(&sc->ml_mii, mii_list); return(0); } static int mlphy_service(struct mii_softc *xsc, struct mii_data *mii, int cmd) { struct ifmedia_entry *ife = mii->mii_media.ifm_cur; int reg; struct mii_softc *other = NULL; struct mlphy_softc *msc = (struct mlphy_softc *)xsc; struct mii_softc *sc = &msc->ml_mii; device_t *devlist; int devs, i; const struct mii_media *mm; /* * See if there's another PHY on this bus with us. * If so, we may need it for 10Mbps modes. */ device_get_children(msc->ml_mii.mii_dev, &devlist, &devs); for (i = 0; i < devs; i++) { if (strcmp(device_get_name(devlist[i]), "mlphy")) { other = device_get_softc(devlist[i]); break; } } kfree(devlist, M_TEMP); KKASSERT(ife->ifm_data >= 0 && ife->ifm_data < MII_NMEDIA); mm = &mii_media_table[ife->ifm_data]; 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 media indicates a different PHY instance, * isolate ourselves. */ if (IFM_INST(ife->ifm_media) != sc->mii_inst) { reg = PHY_READ(sc, MII_BMCR); PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); return (0); } /* * 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: /* * For autonegotiation, reset and isolate the * companion PHY (if any) and then do NWAY * autonegotiation ourselves. */ 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, 1); msc->ml_linked = 0; return(0); case IFM_10_T: /* * For 10baseT modes, reset and program the * companion PHY (of any), then program ourselves * to match. This will put us in pass-through * mode and let the companion PHY do all the * work. */ if (other != NULL) { mii_phy_reset(other); PHY_WRITE(other, MII_BMCR, mm->mm_bmcr); } PHY_WRITE(sc, MII_ANAR, mm->mm_anar); PHY_WRITE(sc, MII_BMCR, mm->mm_bmcr); msc->ml_state = 0; break; case IFM_100_TX: /* * For 100baseTX modes, reset and isolate the * companion PHY (if any), then program ourselves * accordingly. */ if (other != NULL) { mii_phy_reset(other); PHY_WRITE(other, MII_BMCR, BMCR_ISO); } PHY_WRITE(sc, MII_ANAR, mm->mm_anar); PHY_WRITE(sc, MII_BMCR, mm->mm_bmcr); msc->ml_state = 0; break; case IFM_100_T4: /* * XXX Not supported as a manual setting right now. */ return (EINVAL); default: break; } break; case MII_TICK: /* * If we're not currently selected, just return. */ if (IFM_INST(ife->ifm_media) != sc->mii_inst) return (0); /* * Is the interface even up? */ 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 <= sc->mii_anegticks) return (0); 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); } if (mii_phy_auto(sc, 0) == EJUSTRETURN) return(0); break; } /* Update the media status. */ if (msc->ml_state == ML_STATE_AUTO_OTHER) { int other_inst; other_inst = other->mii_inst; other->mii_inst = sc->mii_inst; other->mii_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); } /* * The Micro Linear PHY comes out of reset with the 'autoneg * enable' bit set, which we don't want. */ static 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. */ static void mlphy_status(struct mii_softc *sc) { struct mlphy_softc *msc = (struct mlphy_softc *)sc; struct mii_data *mii = msc->ml_mii.mii_pdata; struct mii_softc *other = NULL; device_t *devlist; int devs, i; /* See if there's another PHY on the bus with us. */ device_get_children(msc->ml_mii.mii_dev, &devlist, &devs); for (i = 0; i < devs; i++) { if (strcmp(device_get_name(devlist[i]), "mlphy")) { other = device_get_softc(devlist[i]); break; } } kfree(devlist, M_TEMP); if (other == NULL) return; ukphy_status(sc); if (IFM_SUBTYPE(mii->mii_media_active) != IFM_10_T) { msc->ml_state = ML_STATE_AUTO_SELF; 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); mii_phy_reset(other); mii_phy_auto(other, 1); } }