/* $NetBSD: nsphy.c,v 1.66 2020/03/15 23:04:50 thorpej Exp $ */ /*- * Copyright (c) 1998, 1999, 2000 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. */ /* * driver for National Semiconductor's DP83840A ethernet 10/100 PHY * Data Sheet available from www.national.com */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: nsphy.c,v 1.66 2020/03/15 23:04:50 thorpej Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/device.h> #include <sys/socket.h> #include <sys/errno.h> #include <net/if.h> #include <net/if_media.h> #include <dev/mii/mii.h> #include <dev/mii/miivar.h> #include <dev/mii/miidevs.h> #include <dev/mii/nsphyreg.h> static int nsphymatch(device_t, cfdata_t, void *); static void nsphyattach(device_t, device_t, void *); CFATTACH_DECL_NEW(nsphy, sizeof(struct mii_softc), nsphymatch, nsphyattach, mii_phy_detach, mii_phy_activate); 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 *sc); static const struct mii_phy_funcs nsphy_funcs = { nsphy_service, nsphy_status, nsphy_reset, }; static const struct mii_phydesc nsphys[] = { MII_PHY_DESC(xxNATSEMI, DP83840), MII_PHY_END, }; static int nsphymatch(device_t parent, cfdata_t match, void *aux) { struct mii_attach_args *ma = aux; if (mii_phy_match(ma, nsphys) != NULL) return 10; return 0; } static void nsphyattach(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, nsphys); 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 = &nsphy_funcs; sc->mii_pdata = mii; sc->mii_flags = ma->mii_flags; 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 nsphy_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 (ife != NULL && 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 (ife != NULL && 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; 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; PHY_WRITE(sc, MII_NSPHY_PCR, reg); mii_phy_setmedia(sc); break; case MII_TICK: /* If we're not currently selected, just return. */ if (ife != NULL && 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 nsphy_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, aner, anar, par, anlpar, result; 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; 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. */ PHY_READ(sc, MII_ANER, &aner); if (aner & ANER_LPAN) { PHY_READ(sc, MII_ANAR, &anar); PHY_READ(sc, MII_ANLPAR, &anlpar); result = anar & anlpar; if (result & ANLPAR_TX_FD) mii->mii_media_active |= IFM_100_TX | IFM_FDX; else if (result & ANLPAR_T4) mii->mii_media_active |= IFM_100_T4 | IFM_HDX; else if (result & ANLPAR_TX) mii->mii_media_active |= IFM_100_TX | IFM_HDX; else if (result & ANLPAR_10_FD) mii->mii_media_active |= IFM_10_T | IFM_FDX; else if (result & ANLPAR_10) mii->mii_media_active |= IFM_10_T | IFM_HDX; 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. */ PHY_READ(sc, MII_NSPHY_PAR, &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) { int i; uint16_t reg; KASSERT(mii_locked(sc->mii_pdata)); if (sc->mii_flags & MIIF_NOISOLATE) reg = BMCR_RESET; else reg = BMCR_RESET | BMCR_ISO; PHY_WRITE(sc, MII_BMCR, reg); /* * Give it a little time to settle in case we just got power. * The DP83840A data sheet suggests that a soft reset not happen * within 500us of power being applied. 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++) { PHY_READ(sc, MII_BMCR, ®); if (reg && ((reg & BMCR_RESET) == 0)) break; delay(2000); } if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); }
