/* $NetBSD: nsphy.c,v 1.18 1999/07/14 23:57:36 thorpej Exp $ */ /*- * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * 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 the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /*- * Copyright (c) 1997 Manuel Bouyer. 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 Manuel Bouyer. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * 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. */ #include __FBSDID("$FreeBSD$"); /* * driver for National Semiconductor's DP83840A ethernet 10/100 PHY * Data Sheet available from www.national.com */ #include #include #include #include #include #include #include #include #include #include #include #include "miidevs.h" #include #include "miibus_if.h" static int nsphy_probe(device_t); static int nsphy_attach(device_t); static device_method_t nsphy_methods[] = { /* device interface */ DEVMETHOD(device_probe, nsphy_probe), DEVMETHOD(device_attach, nsphy_attach), DEVMETHOD(device_detach, mii_phy_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), { 0, 0 } }; static devclass_t nsphy_devclass; static driver_t nsphy_driver = { "nsphy", nsphy_methods, sizeof(struct mii_softc) }; DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0); static int nsphy_service(struct mii_softc *, struct mii_data *, int); static void nsphy_status(struct mii_softc *); static void nsphy_reset(struct mii_softc *); static const struct mii_phydesc nsphys[] = { MII_PHY_DESC(NATSEMI, DP83840), MII_PHY_END }; static int nsphy_probe(device_t dev) { return (mii_phy_dev_probe(dev, nsphys, BUS_PROBE_DEFAULT)); } static int nsphy_attach(device_t dev) { struct mii_softc *sc; struct mii_attach_args *ma; struct mii_data *mii; const char *nic; sc = device_get_softc(dev); ma = device_get_ivars(dev); 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_phy = ma->mii_phyno; sc->mii_service = nsphy_service; sc->mii_pdata = mii; mii->mii_instance++; nic = device_get_name(device_get_parent(sc->mii_dev)); /* * Am79C971 and i82557 wedge when isolating all of their * (external) PHYs. */ if (strcmp(nic, "fxp") == 0 || strcmp(nic, "pcn") == 0) sc->mii_flags |= MIIF_NOISOLATE; /* * DP83840A used with HME chips don't advertise their media * capabilities themselves properly so force writing the ANAR * according to the BMSR in mii_phy_setmedia(). */ if (strcmp(nic, "hme") == 0) sc->mii_flags |= MIIF_FORCEANEG; #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) /* * In order for MII loopback to work Am79C971 and greater PCnet * chips additionally need to be placed into external loopback * mode which pcn(4) doesn't do so far. */ if (strcmp(nic, "pcn") != 0) #if 1 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), MII_MEDIA_100_TX); #else if (strcmp(nic, "pcn") == 0) sc->mii_flags |= MIIF_NOLOOP; #endif nsphy_reset(sc); sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; device_printf(dev, " "); mii_phy_add_media(sc); printf("\n"); #undef ADD MIIBUS_MEDIAINIT(sc->mii_dev); return (0); } static int nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) { struct ifmedia_entry *ife = mii->mii_media.ifm_cur; int reg; 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; reg = PHY_READ(sc, MII_NSPHY_PCR); /* * Set up the PCR to use LED4 to indicate full-duplex * in both 10baseT and 100baseTX modes. */ reg |= PCR_LED4MODE; /* * Make sure Carrier Integrity Monitor function is * disabled (normal for Node operation, but sometimes * it's not set?!) */ reg |= PCR_CIMDIS; /* * Make sure "force link good" is set to normal mode. * It's only intended for debugging. */ reg |= PCR_FLINK100; /* * Mystery bits which are supposedly `reserved', * but we seem to need to set them when the PHY * is connected to some interfaces: * * 0x0400 is needed for fxp * (Intel EtherExpress Pro 10+/100B, 82557 chip) * (nsphy with a DP83840 chip) * 0x0100 may be needed for some other card */ reg |= 0x0100 | 0x0400; if (strcmp(mii->mii_ifp->if_dname, "fxp") == 0) PHY_WRITE(sc, MII_NSPHY_PCR, reg); 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; } /* Update the media status. */ nsphy_status(sc); /* Callback if something changed. */ mii_phy_update(sc, cmd); return (0); } static void nsphy_status(struct mii_softc *sc) { struct mii_data *mii = sc->mii_pdata; struct ifmedia_entry *ife = mii->mii_media.ifm_cur; int bmsr, bmcr, par, anlpar; 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; if (bmcr & BMCR_AUTOEN) { /* * The PAR status bits are only valid if autonegotiation * has completed (or it's disabled). */ if ((bmsr & BMSR_ACOMP) == 0) { /* Erg, still trying, I guess... */ mii->mii_media_active |= IFM_NONE; return; } /* * Argh. The PAR doesn't seem to indicate duplex mode * properly! Determine media based on link partner's * advertised capabilities. */ if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { anlpar = PHY_READ(sc, MII_ANAR) & PHY_READ(sc, MII_ANLPAR); if (anlpar & ANLPAR_TX_FD) mii->mii_media_active |= IFM_100_TX|IFM_FDX; else if (anlpar & ANLPAR_T4) mii->mii_media_active |= IFM_100_T4; else if (anlpar & ANLPAR_TX) mii->mii_media_active |= IFM_100_TX; else if (anlpar & ANLPAR_10_FD) mii->mii_media_active |= IFM_10_T|IFM_FDX; else if (anlpar & ANLPAR_10) mii->mii_media_active |= IFM_10_T; else mii->mii_media_active |= IFM_NONE; return; } /* * Link partner is not capable of autonegotiation. * We will never be in full-duplex mode if this is * the case, so reading the PAR is OK. */ par = PHY_READ(sc, MII_NSPHY_PAR); if (par & PAR_10) mii->mii_media_active |= IFM_10_T; else mii->mii_media_active |= IFM_100_TX; #if 0 if (par & PAR_FDX) mii->mii_media_active |= IFM_FDX; #endif } else mii->mii_media_active = ife->ifm_media; } static void nsphy_reset(struct mii_softc *sc) { struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; int reg, i; if (sc->mii_flags & MIIF_NOISOLATE) reg = BMCR_RESET; else reg = BMCR_RESET | BMCR_ISO; PHY_WRITE(sc, MII_BMCR, reg); /* * It is best to allow a little time for the reset to settle * in before we start polling the BMCR again. Notably, the * DP83840A manuals state that there should be a 500us delay * between asserting software reset and attempting MII serial * operations. Be conservative. */ DELAY(1000); /* * Wait another 2s for it to complete. * This is only a little overkill as under normal circumstances * the PHY can take up to 1s to complete reset. * This is also a bit odd because after a reset, the BMCR will * clear the reset bit and simply reports 0 even though the reset * is not yet complete. */ for (i = 0; i < 1000; i++) { reg = PHY_READ(sc, MII_BMCR); if (reg != 0 && (reg & BMCR_RESET) == 0) break; DELAY(2000); } if ((sc->mii_flags & MIIF_NOISOLATE) == 0) { if ((ife == NULL && sc->mii_inst != 0) || (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst)) PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); } }