/* $NetBSD: smscphy.c,v 1.4 2021/08/25 21:50:29 andvar Exp $ */ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2006 Benno Rice. 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. */ /* $FreeBSD: head/sys/dev/mii/smscphy.c 326255 2017-11-27 14:52:40Z pfg $ */ /* * Driver for the SMSC LAN8710A */ #include __KERNEL_RCSID(0, "$NetBSD: smscphy.c,v 1.4 2021/08/25 21:50:29 andvar Exp $"); #include #include #include #include #include #include #include #include #include #include #include /* PHY special control/status register */ #define SMSCPHY_SPCSR 0x1f #define SPCSR_SPDIND_10 0x0004 #define SPCSR_SPDIND_100 0x0008 #define SPCSR_SPDIND_SPDMASK 0x000c #define SPCSR_SPDIND_FDX 0x0010 static int smscphy_match(device_t, cfdata_t, void *); static void smscphy_attach(device_t, device_t, void *); CFATTACH_DECL_NEW(smscphy, sizeof (struct mii_softc), smscphy_match, smscphy_attach, mii_phy_detach, mii_phy_activate); static void smscphy_power(struct mii_softc *, bool); static int smscphy_service(struct mii_softc *, struct mii_data *, int); static void smscphy_auto(struct mii_softc *, int); static void smscphy_status(struct mii_softc *); static const struct mii_phydesc smscphys[] = { MII_PHY_DESC(SMSC, LAN8700), MII_PHY_DESC(SMSC, LAN8710_LAN8720), MII_PHY_END }; static const struct mii_phy_funcs smscphy_funcs = { smscphy_service, smscphy_status, mii_phy_reset }; static int smscphy_match(device_t dev, cfdata_t match, void *aux) { struct mii_attach_args *ma = aux; if (mii_phy_match(ma, smscphys) != NULL) return 10; return 0; } static void smscphy_attach(device_t parent, device_t self, void *aux) { struct mii_softc *sc = device_private(self); struct mii_attach_args *ma = aux; struct mii_data *mii = ma->mii_data; const struct mii_phydesc *mpd; mpd = mii_phy_match(ma, smscphys); aprint_naive(": Media interface\n"); aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); sc->mii_dev = self; sc->mii_inst = mii->mii_instance; sc->mii_phy = ma->mii_phyno; sc->mii_funcs = &smscphy_funcs; sc->mii_mpd_oui = MII_OUI(ma->mii_id1, ma->mii_id2); sc->mii_mpd_model = MII_MODEL(ma->mii_id2); sc->mii_mpd_rev = MII_REV(ma->mii_id2); sc->mii_pdata = mii; sc->mii_flags = ma->mii_flags; mii_lock(mii); PHY_RESET(sc); PHY_READ(sc, MII_BMSR, &sc->mii_capabilities); sc->mii_capabilities &= ma->mii_capmask; mii_unlock(mii); mii_phy_add_media(sc); } static void smscphy_power(struct mii_softc *sc, bool power) { uint16_t bmcr, new; PHY_READ(sc, MII_BMCR, &bmcr); if (power) new = bmcr & ~BMCR_PDOWN; else new = bmcr | BMCR_PDOWN; if (bmcr != new) PHY_WRITE(sc, MII_BMCR, new); } static int smscphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) { struct ifmedia_entry *ife; uint16_t reg; KASSERT(mii_locked(mii)); ife = mii->mii_media.ifm_cur; switch (cmd) { case MII_POLLSTAT: break; case MII_MEDIACHG: /* Try to power up the PHY in case it's down */ if (IFM_SUBTYPE(ife->ifm_media) != IFM_NONE) smscphy_power(sc, true); switch (IFM_SUBTYPE(ife->ifm_media)) { case IFM_AUTO: smscphy_auto(sc, ife->ifm_media); break; default: mii_phy_setmedia(sc); if (IFM_SUBTYPE(ife->ifm_media) == IFM_NONE) smscphy_power(sc, false); break; } break; case MII_TICK: if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) break; PHY_READ(sc, MII_BMSR, ®); PHY_READ(sc, MII_BMSR, ®); if (reg & BMSR_LINK) { sc->mii_ticks = 0; break; } if (++sc->mii_ticks <= MII_ANEGTICKS) break; PHY_RESET(sc); smscphy_auto(sc, ife->ifm_media); break; } /* Update the media status. */ PHY_STATUS(sc); /* Callback if something changed. */ mii_phy_update(sc, cmd); return 0; } static void smscphy_auto(struct mii_softc *sc, int media) { uint16_t anar; sc->mii_ticks = 0; anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA; if ((media & IFM_FLOW) != 0) anar |= ANAR_FC; PHY_WRITE(sc, MII_ANAR, anar); /* Apparently this helps. */ PHY_READ(sc, MII_ANAR, &anar); PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); } static void smscphy_status(struct mii_softc *sc) { struct mii_data *mii = sc->mii_pdata; uint16_t bmcr, bmsr, status; KASSERT(mii_locked(mii)); mii->mii_media_status = IFM_AVALID; mii->mii_media_active = IFM_ETHER; PHY_READ(sc, MII_BMSR, &bmsr); PHY_READ(sc, MII_BMSR, &bmsr); if ((bmsr & BMSR_LINK) != 0) mii->mii_media_status |= IFM_ACTIVE; PHY_READ(sc, MII_BMCR, &bmcr); if ((bmcr & BMCR_ISO) != 0) { mii->mii_media_active |= IFM_NONE; mii->mii_media_status = 0; return; } if ((bmcr & BMCR_LOOP) != 0) mii->mii_media_active |= IFM_LOOP; if ((bmcr & BMCR_AUTOEN) != 0) { if ((bmsr & BMSR_ACOMP) == 0) { /* Erg, still trying, I guess... */ mii->mii_media_active |= IFM_NONE; return; } } PHY_READ(sc, SMSCPHY_SPCSR, &status); if ((status & SPCSR_SPDIND_SPDMASK) == SPCSR_SPDIND_100) mii->mii_media_active |= IFM_100_TX; else mii->mii_media_active |= IFM_10_T; if (status & SPCSR_SPDIND_FDX) mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); else mii->mii_media_active |= IFM_HDX; }