/* $NetBSD: pnaphy.c,v 1.26 2020/03/15 23:04:50 thorpej Exp $ */ /* * Copyright 2001 Wasabi Systems, Inc. * All rights reserved. * * Written by Jason R. Thorpe for Wasabi Systems, Inc. * * 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 for the NetBSD Project by * Wasabi Systems, Inc. * 4. The name of Wasabi Systems, Inc. may not be used to endorse * or promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC * 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 generic HomePNA 1.0 PHYs. * * HomePNA 1.0 PHYs are pretty simple -- they support exactly one * media type, and don't do autonegotiation. * * HomePNA PHYs often have vendor-specific registers for tuning * the network connection, but we don't deal with any of that * at all. */ #include __KERNEL_RCSID(0, "$NetBSD: pnaphy.c,v 1.26 2020/03/15 23:04:50 thorpej Exp $"); #include #include #include #include #include #include #include #include #include #include #include static int pnaphymatch(device_t, cfdata_t, void *); static void pnaphyattach(device_t, device_t, void *); CFATTACH_DECL_NEW(pnaphy, sizeof(struct mii_softc), pnaphymatch, pnaphyattach, mii_phy_detach, mii_phy_activate); static int pnaphy_service(struct mii_softc *, struct mii_data *, int); static void pnaphy_status(struct mii_softc *); static const struct mii_phy_funcs pnaphy_funcs = { pnaphy_service, pnaphy_status, mii_phy_reset, }; static const struct mii_phydesc pnaphys[] = { MII_PHY_DESC(yyAMD, 79c901home), MII_PHY_END, }; static int pnaphymatch(device_t parent, cfdata_t match, void *aux) { struct mii_attach_args *ma = aux; if (mii_phy_match(ma, pnaphys) != NULL) { /* * Match higher than ukphy, but lower than a specific * driver would match. */ return 2; } return 0; } static void pnaphyattach(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, pnaphys); 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 = &pnaphy_funcs; sc->mii_pdata = mii; sc->mii_flags = ma->mii_flags | MIIF_IS_HPNA; /* Force HomePNA */ 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 int pnaphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) { struct ifmedia_entry *ife = mii->mii_media.ifm_cur; uint16_t reg; KASSERT(mii_locked(mii)); 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) { 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; mii_phy_setmedia(sc); break; case MII_TICK: /* If we're not currently selected, just return. */ if (IFM_INST(ife->ifm_media) != sc->mii_inst) return 0; if (mii_phy_tick(sc) == EJUSTRETURN) return 0; break; case MII_DOWN: mii_phy_down(sc); return 0; } /* Update the media status. */ mii_phy_status(sc); /* Callback if something changed. */ mii_phy_update(sc, cmd); return 0; } static void pnaphy_status(struct mii_softc *sc) { struct mii_data *mii = sc->mii_pdata; struct ifmedia_entry *ife = mii->mii_media.ifm_cur; uint16_t bmsr, bmcr; 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) mii->mii_media_status |= IFM_ACTIVE; PHY_READ(sc, MII_BMCR, &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; /* * On HomePNA PHYs, the current media is always the selected * media. * * XXX May not be the case w/ HomePNA 2. */ mii->mii_media_active = ife->ifm_media; }