/* $NetBSD: nsphy.c,v 1.18 1999/07/14 23:57:36 thorpej Exp $ */ /*- * SPDX-License-Identifier: BSD-2-Clause * * 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. * * 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. * * 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 <sys/cdefs.h> /* * driver for National Semiconductor's DP83840A ethernet 10/100 PHY * Data Sheet available from www.national.com */ #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/socket.h> #include <sys/errno.h> #include <sys/module.h> #include <sys/bus.h> #include <net/if.h> #include <net/if_var.h> #include <net/if_media.h> #include <dev/mii/mii.h> #include <dev/mii/miivar.h> #include "miidevs.h" #include <dev/mii/nsphyreg.h> #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), DEVMETHOD_END }; static driver_t nsphy_driver = { "nsphy", nsphy_methods, sizeof(struct mii_softc) }; DRIVER_MODULE(nsphy, miibus, nsphy_driver, 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(xxNATSEMI, DP83840), MII_PHY_END }; static const struct mii_phy_funcs nsphy_funcs = { nsphy_service, nsphy_status, nsphy_reset }; static int nsphy_probe(device_t dev) { return (mii_phy_dev_probe(dev, nsphys, BUS_PROBE_DEFAULT)); } static int nsphy_attach(device_t dev) { mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &nsphy_funcs, 1); return (0); } static int nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) { int reg; switch (cmd) { case MII_POLLSTAT: break; case MII_MEDIACHG: 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 (mii_phy_mac_match(sc, "fxp")) PHY_WRITE(sc, MII_NSPHY_PCR, reg); mii_phy_setmedia(sc); break; case MII_TICK: if (mii_phy_tick(sc) == EJUSTRETURN) return (0); break; } /* Update the media status. */ PHY_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|IFM_HDX; else if (anlpar & ANLPAR_TX) mii->mii_media_active |= IFM_100_TX|IFM_HDX; 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|IFM_HDX; else mii->mii_media_active |= IFM_NONE; if ((mii->mii_media_active & IFM_FDX) != 0) mii->mii_media_active |= mii_phy_flowstatus(sc); 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; mii->mii_media_active |= IFM_HDX; } 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); } }
