/*- * 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. * * $FreeBSD: src/sys/dev/mii/atphy.c,v 1.3 2008/10/25 06:39:17 yongari Exp $ */ /* * Driver for the Attansic/Atheros F1 10/100/1000 PHY. */ #include #include #include #include #include #include #include #include #include #include "miibus_if.h" static int atphy_probe(device_t); static int atphy_attach(device_t); static int atphy_service(struct mii_softc *, struct mii_data *, int); static void atphy_status(struct mii_softc *); static void atphy_reset(struct mii_softc *); static uint16_t atphy_anar(struct ifmedia_entry *); static void atphy_auto(struct mii_softc *); static device_method_t atphy_methods[] = { /* Device interface. */ DEVMETHOD(device_probe, atphy_probe), DEVMETHOD(device_attach, atphy_attach), DEVMETHOD(device_detach, ukphy_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), { 0, 0 } }; static const struct mii_phydesc atphys[] = { MII_PHYDESC(ATHEROS, F1), MII_PHYDESC(ATHEROS, F2), MII_PHYDESC_NULL }; static devclass_t atphy_devclass; static driver_t atphy_driver = { "atphy", atphy_methods, sizeof(struct mii_softc) }; DRIVER_MODULE(atphy, miibus, atphy_driver, atphy_devclass, NULL, NULL); static int atphy_probe(device_t dev) { struct mii_attach_args *ma = device_get_ivars(dev); const struct mii_phydesc *mpd; mpd = mii_phy_match(ma, atphys); if (mpd != NULL) { device_set_desc(dev, mpd->mpd_name); return 0; } return ENXIO; } static int atphy_attach(device_t dev) { struct mii_softc *sc; struct mii_attach_args *ma; struct mii_data *mii; sc = device_get_softc(dev); 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 = atphy_service; sc->mii_pdata = mii; sc->mii_anegticks = MII_ANEGTICKS_GIGE; mii->mii_instance++; 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); device_printf(dev, " "); if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0 && (sc->mii_extcapabilities & EXTSR_MEDIAMASK) == 0) kprintf("no media present"); else mii_phy_add_media(sc); kprintf("\n"); atphy_reset(sc); MIIBUS_MEDIAINIT(sc->mii_dev); return 0; } static 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; if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO || IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T) { atphy_auto(sc); break; } bmcr = 0; switch (IFM_SUBTYPE(ife->ifm_media)) { 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 inaccessbility of * hardware of freshly rebooted system. Disable * powering down PHY until I got more information for * Attansic/Atheros PHY hardwares. */ PHY_WRITE(sc, MII_BMCR, bmcr | BMCR_ISO); goto done; default: return EINVAL; } anar = atphy_anar(ife); if ((ife->ifm_media & IFM_GMASK) & IFM_FDX) { bmcr |= BMCR_FDX; /* Enable pause. */ anar |= (3 << 10); } if (sc->mii_extcapabilities & (EXTSR_1000TFDX | EXTSR_1000THDX)) PHY_WRITE(sc, MII_100T2CR, 0); PHY_WRITE(sc, MII_ANAR, anar | ANAR_CSMA); /* * 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; if (sc->mii_ticks <= sc->mii_anegticks) return 0; sc->mii_ticks = 0; atphy_auto(sc); break; } /* Update the media status. */ atphy_status(sc); /* Callback if something changed. */ mii_phy_update(sc, cmd); return 0; } static void atphy_status(struct mii_softc *sc) { struct mii_data *mii = sc->mii_pdata; uint32_t bmsr, bmcr, 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) == 0) { /* 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) got 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; else mii->mii_media_active |= IFM_HDX; /* XXX Master/Slave, Flow-control */ } static 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_auto(sc); for (i = 0; i < 1000; i++) { DELAY(1); if ((PHY_READ(sc, MII_BMCR) & BMCR_RESET) == 0) break; } } static uint16_t atphy_anar(struct ifmedia_entry *ife) { uint16_t anar = 0; switch (IFM_SUBTYPE(ife->ifm_media)) { case IFM_AUTO: anar |= ANAR_TX_FD | ANAR_TX | ANAR_10_FD | ANAR_10; return anar; case IFM_1000_T: return anar; case IFM_100_TX: anar |= ANAR_TX; break; case IFM_10_T: anar |= ANAR_10; break; default: return 0; } if ((ife->ifm_media & IFM_GMASK) & IFM_FDX) { if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_TX) anar |= ANAR_TX_FD; else anar |= ANAR_10_FD; } return anar; } static void atphy_auto(struct mii_softc *sc) { uint16_t anar; anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities); PHY_WRITE(sc, MII_ANAR, anar | (3 << 10) | ANAR_CSMA); if (sc->mii_extcapabilities & (EXTSR_1000TFDX | EXTSR_1000THDX)) { PHY_WRITE(sc, MII_100T2CR, GTCR_ADV_1000TFDX | GTCR_ADV_1000THDX); } PHY_WRITE(sc, MII_BMCR, BMCR_RESET | BMCR_AUTOEN | BMCR_STARTNEG); }