/* $NetBSD: micphy.c,v 1.1 2014/02/26 04:13:44 ozaki-r 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, and by Frank van der Linden. * * 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 Micrel KSZ9021RN PHYs */ #include __KERNEL_RCSID(0, "$NetBSD: micphy.c,v 1.1 2014/02/26 04:13:44 ozaki-r Exp $"); #include "opt_mii.h" #include #include #include #include #include #include #include #include #include #include #include static int micphymatch(device_t, cfdata_t, void *); static void micphyattach(device_t, device_t, void *); CFATTACH_DECL3_NEW(micphy, sizeof(struct mii_softc), micphymatch, micphyattach, mii_phy_detach, mii_phy_activate, NULL, NULL, DVF_DETACH_SHUTDOWN); static int micphy_service(struct mii_softc *, struct mii_data *, int); static void micphy_fixup(struct mii_softc *, int, int, device_t); static const struct mii_phy_funcs micphy_funcs = { micphy_service, ukphy_status, mii_phy_reset, }; static const struct mii_phydesc micphys[] = { { MII_OUI_MICREL, MII_MODEL_MICREL_KSZ9021RNI, MII_STR_MICREL_KSZ9021RNI }, { 0, 0, NULL }, }; static int micphymatch(device_t parent, cfdata_t match, void *aux) { struct mii_attach_args *ma = aux; if (mii_phy_match(ma, micphys) != NULL) return 10; return 1; } static void micphyattach(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; int model = MII_MODEL(ma->mii_id2); int rev = MII_REV(ma->mii_id2); const struct mii_phydesc *mpd; mpd = mii_phy_match(ma, micphys); aprint_naive(": Media interface\n"); aprint_normal(": %s, rev. %d\n", mpd->mpd_name, rev); sc->mii_dev = self; sc->mii_inst = mii->mii_instance; sc->mii_phy = ma->mii_phyno; sc->mii_funcs = &micphy_funcs; sc->mii_pdata = mii; sc->mii_flags = ma->mii_flags; sc->mii_anegticks = MII_ANEGTICKS; PHY_RESET(sc); micphy_fixup(sc, model, rev, parent); 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); aprint_normal_dev(self, ""); if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0 && (sc->mii_extcapabilities & EXTSR_MEDIAMASK) == 0) aprint_error("no media present"); else mii_phy_add_media(sc); aprint_normal("\n"); } static int micphy_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; 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; 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; } #define XREG_CONTROL 0x0b #define XREG_WRITE 0x0c #define XREG_READ 0x0d #define XREG_CTL_SEL_READ 0x0000 #define XREG_CTL_SEL_WRITE 0x8000 #define REG_RGMII_CLOCK_AND_CONTROL 0x104 #define REG_RGMII_RX_DATA 0x105 static void micphy_writexreg(struct mii_softc *sc, uint32_t reg, uint32_t wval) { int rval; PHY_WRITE(sc, XREG_CONTROL, XREG_CTL_SEL_WRITE | reg); PHY_WRITE(sc, XREG_WRITE, wval); PHY_WRITE(sc, XREG_CONTROL, XREG_CTL_SEL_READ | reg); rval = PHY_READ(sc, XREG_READ); KDASSERT(wval == rval); } static void micphy_fixup(struct mii_softc *sc, int model, int rev, device_t parent) { switch (model) { case MII_MODEL_MICREL_KSZ9021RNI: if (!device_is_a(parent, "cpsw")) break; aprint_normal_dev(sc->mii_dev, "adjusting RGMII signal timing for cpsw\n"); // RGMII RX Data Pad Skew micphy_writexreg(sc, REG_RGMII_RX_DATA, 0x0000); // RGMII Clock and Control Pad Skew micphy_writexreg(sc, REG_RGMII_CLOCK_AND_CONTROL, 0x9090); break; } return; }