/* $OpenBSD: atphy.c,v 1.13 2022/04/06 18:59:29 naddy Exp $ */ /*- * Copyright (c) 2008, Pyun YongHyeon * 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 unmodified, 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 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 AUTHOR 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. */ /* * Driver for the Attansic F1 10/100/1000 PHY. */ #include #include #include #include #include #include #include #include #include #include /* Special Control Register */ #define ATPHY_SCR 0x10 #define ATPHY_SCR_JABBER_DISABLE 0x0001 #define ATPHY_SCR_POLARITY_REVERSAL 0x0002 #define ATPHY_SCR_SQE_TEST 0x0004 #define ATPHY_SCR_MAC_PDOWN 0x0008 #define ATPHY_SCR_CLK125_DISABLE 0x0010 #define ATPHY_SCR_MDI_MANUAL_MODE 0x0000 #define ATPHY_SCR_MDIX_MANUAL_MODE 0x0020 #define ATPHY_SCR_AUTO_X_1000T 0x0040 #define ATPHY_SCR_AUTO_X_MODE 0x0060 #define ATPHY_SCR_10BT_EXT_ENABLE 0x0080 #define ATPHY_SCR_MII_5BIT_ENABLE 0x0100 #define ATPHY_SCR_SCRAMBLER_DISABLE 0x0200 #define ATPHY_SCR_FORCE_LINK_GOOD 0x0400 #define ATPHY_SCR_ASSERT_CRS_ON_TX 0x0800 /* Special Status Register. */ #define ATPHY_SSR 0x11 #define ATPHY_SSR_SPD_DPLX_RESOLVED 0x0800 #define ATPHY_SSR_DUPLEX 0x2000 #define ATPHY_SSR_SPEED_MASK 0xC000 #define ATPHY_SSR_10MBS 0x0000 #define ATPHY_SSR_100MBS 0x4000 #define ATPHY_SSR_1000MBS 0x8000 int atphy_service(struct mii_softc *, struct mii_data *, int); void atphy_attach(struct device *, struct device *, void *); int atphy_match(struct device *, void *, void *); void atphy_reset(struct mii_softc *); void atphy_status(struct mii_softc *); int atphy_mii_phy_auto(struct mii_softc *); const struct mii_phy_funcs atphy_funcs = { atphy_service, atphy_status, atphy_reset, }; static const struct mii_phydesc atphys[] = { { MII_OUI_ATHEROS, MII_MODEL_ATHEROS_F1, MII_STR_ATHEROS_F1 }, { MII_OUI_ATHEROS, MII_MODEL_ATHEROS_F2, MII_STR_ATHEROS_F2 }, { MII_OUI_ATHEROS, MII_MODEL_ATHEROS_AR8035, MII_STR_ATHEROS_AR8035 }, { 0, 0, NULL }, }; const struct cfattach atphy_ca = { sizeof (struct mii_softc), atphy_match, atphy_attach, mii_phy_detach }; struct cfdriver atphy_cd = { NULL, "atphy", DV_DULL }; int atphy_match(struct device *parent, void *match, void *aux) { struct mii_attach_args *ma = aux; if (mii_phy_match(ma, atphys) != NULL) return (10); return (0); } void atphy_attach(struct device *parent, struct device *self, void *aux) { struct mii_softc *sc = (struct mii_softc *)self; struct mii_attach_args *ma = aux; struct mii_data *mii = ma->mii_data; const struct mii_phydesc *mpd; mpd = mii_phy_match(ma, atphys); printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); sc->mii_inst = mii->mii_instance; sc->mii_phy = ma->mii_phyno; sc->mii_funcs = &atphy_funcs; sc->mii_oui = MII_OUI(ma->mii_id1, ma->mii_id2); sc->mii_model = MII_MODEL(ma->mii_id2); sc->mii_pdata = mii; sc->mii_flags = ma->mii_flags; sc->mii_anegticks = MII_ANEGTICKS_GIGE; sc->mii_flags |= MIIF_NOLOOP; PHY_RESET(sc); sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; if (sc->mii_capabilities & BMSR_EXTSTAT) sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR); mii_phy_add_media(sc); } int atphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) { struct ifmedia_entry *ife = mii->mii_media.ifm_cur; uint16_t anar, bmcr, bmsr; 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) { bmcr = PHY_READ(sc, MII_BMCR); PHY_WRITE(sc, MII_BMCR, bmcr | BMCR_ISO); return (0); } /* * If the interface is not up, don't do anything. */ if ((mii->mii_ifp->if_flags & IFF_UP) == 0) break; bmcr = 0; switch (IFM_SUBTYPE(ife->ifm_media)) { case IFM_AUTO: case IFM_1000_T: atphy_mii_phy_auto(sc); goto done; case IFM_100_TX: bmcr = BMCR_S100; break; case IFM_10_T: bmcr = BMCR_S10; break; case IFM_NONE: bmcr = PHY_READ(sc, MII_BMCR); /* * XXX * Due to an unknown reason powering down PHY resulted * in unexpected results such as inaccessibility of * hardware of freshly rebooted system. Disable * powering down PHY until I get more information for * Attansic/Atheros PHY hardware. */ PHY_WRITE(sc, MII_BMCR, bmcr | BMCR_ISO); goto done; default: return (EINVAL); } anar = mii_anar(ife->ifm_media); if (((ife->ifm_media & IFM_GMASK) & IFM_FDX) != 0) { bmcr |= BMCR_FDX; /* Enable pause. */ if (sc->mii_flags & MIIF_DOPAUSE) anar |= ANAR_PAUSE_TOWARDS; } if ((sc->mii_extcapabilities & (EXTSR_1000TFDX | EXTSR_1000THDX)) != 0) PHY_WRITE(sc, MII_100T2CR, 0); PHY_WRITE(sc, MII_ANAR, anar); /* * Reset the PHY so all changes take effect. */ PHY_WRITE(sc, MII_BMCR, bmcr | BMCR_RESET | BMCR_AUTOEN | BMCR_STARTNEG); done: 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) { sc->mii_ticks = 0; break; } /* * Check for link. * Read the status register twice; BMSR_LINK is latch-low. */ bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); if (bmsr & BMSR_LINK) { sc->mii_ticks = 0; break; } /* Announce link loss right after it happens. */ if (sc->mii_ticks++ == 0) break; /* * Only retry autonegotiation every mii_anegticks seconds. */ if (sc->mii_ticks <= sc->mii_anegticks) return (0); sc->mii_ticks = 0; atphy_mii_phy_auto(sc); break; } /* Update the media status. */ mii_phy_status(sc); /* Callback if something changed. */ mii_phy_update(sc, cmd); return (0); } void atphy_status(struct mii_softc *sc) { struct mii_data *mii = sc->mii_pdata; uint32_t bmsr, bmcr, gsr, ssr; mii->mii_media_status = IFM_AVALID; mii->mii_media_active = IFM_ETHER; bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); if (bmsr & BMSR_LINK) mii->mii_media_status |= IFM_ACTIVE; bmcr = PHY_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; ssr = PHY_READ(sc, ATPHY_SSR); if (!(ssr & ATPHY_SSR_SPD_DPLX_RESOLVED)) { /* Erg, still trying, I guess... */ mii->mii_media_active |= IFM_NONE; return; } switch (ssr & ATPHY_SSR_SPEED_MASK) { case ATPHY_SSR_1000MBS: mii->mii_media_active |= IFM_1000_T; /* * atphy(4) has a valid link so reset mii_ticks. * Resetting mii_ticks is needed in order to * detect link loss after auto-negotiation. */ sc->mii_ticks = 0; break; case ATPHY_SSR_100MBS: mii->mii_media_active |= IFM_100_TX; sc->mii_ticks = 0; break; case ATPHY_SSR_10MBS: mii->mii_media_active |= IFM_10_T; sc->mii_ticks = 0; break; default: mii->mii_media_active |= IFM_NONE; return; } if (ssr & ATPHY_SSR_DUPLEX) mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); else mii->mii_media_active |= IFM_HDX; gsr = PHY_READ(sc, MII_100T2SR); if ((IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T) && gsr & GTSR_MS_RES) mii->mii_media_active |= IFM_ETH_MASTER; } void atphy_reset(struct mii_softc *sc) { uint32_t reg; int i; /* Take PHY out of power down mode. */ PHY_WRITE(sc, 29, 0x29); PHY_WRITE(sc, 30, 0); reg = PHY_READ(sc, ATPHY_SCR); /* Enable automatic crossover. */ reg |= ATPHY_SCR_AUTO_X_MODE; /* Disable power down. */ reg &= ~ATPHY_SCR_MAC_PDOWN; /* Enable CRS on Tx. */ reg |= ATPHY_SCR_ASSERT_CRS_ON_TX; /* Auto correction for reversed cable polarity. */ reg |= ATPHY_SCR_POLARITY_REVERSAL; PHY_WRITE(sc, ATPHY_SCR, reg); /* Workaround F1 bug to reset phy. */ atphy_mii_phy_auto(sc); for (i = 0; i < 1000; i++) { DELAY(1); if ((PHY_READ(sc, MII_BMCR) & BMCR_RESET) == 0) break; } } int atphy_mii_phy_auto(struct mii_softc *sc) { uint16_t anar; anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA; if (sc->mii_flags & MIIF_DOPAUSE) anar |= ANAR_PAUSE_TOWARDS; PHY_WRITE(sc, MII_ANAR, anar); if (sc->mii_extcapabilities & (EXTSR_1000TFDX | EXTSR_1000THDX)) PHY_WRITE(sc, MII_100T2CR, GTCR_ADV_1000TFDX | GTCR_ADV_1000THDX); else if (sc->mii_model == MII_MODEL_ATHEROS_F1) { /* * AR8132 has 10/100 PHY and the PHY uses the same * model number of F1 gigabit PHY. The PHY has no * ability to establish gigabit link so explicitly * disable 1000baseT configuration for the PHY. * Otherwise, there is a case that atphy(4) could * not establish a link against gigabit link partner * unless the link partner supports down-shifting. */ PHY_WRITE(sc, MII_100T2CR, 0); } PHY_WRITE(sc, MII_BMCR, BMCR_RESET | BMCR_AUTOEN | BMCR_STARTNEG); return (EJUSTRETURN); }