1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2000,2001 Jonathan Chen. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions, and the following disclaimer, 12 * without modification, immediately at the beginning of the file. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 22 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD$"); 33 34/* 35 * Driver for the TDK 78Q2120 MII 36 * 37 * References: 38 * Datasheet for the 78Q2120 - http://www.tsc.tdk.com/lan/78q2120.pdf 39 * Most of this code stolen from ukphy.c 40 */ 41 42/* 43 * The TDK 78Q2120 is found on some Xircom X3201 based CardBus cards, 44 * also spotted on some 3C575 cards. It's just like any other normal 45 * phy, except it does auto negotiation in a different way. 46 */ 47 48#include <sys/param.h> 49#include <sys/systm.h> 50#include <sys/kernel.h> 51#include <sys/socket.h> 52#include <sys/errno.h> 53#include <sys/module.h> 54#include <sys/bus.h> 55 56#include <net/if.h> 57#include <net/if_media.h> 58 59#include <dev/mii/mii.h> 60#include <dev/mii/miivar.h> 61#include "miidevs.h" 62 63#include <dev/mii/tdkphyreg.h> 64 65#include "miibus_if.h" 66 67static int tdkphy_probe(device_t); 68static int tdkphy_attach(device_t); 69 70static device_method_t tdkphy_methods[] = { 71 /* device interface */ 72 DEVMETHOD(device_probe, tdkphy_probe), 73 DEVMETHOD(device_attach, tdkphy_attach), 74 DEVMETHOD(device_detach, mii_phy_detach), 75 DEVMETHOD(device_shutdown, bus_generic_shutdown), 76 DEVMETHOD_END 77}; 78 79static devclass_t tdkphy_devclass; 80 81static driver_t tdkphy_driver = { 82 "tdkphy", 83 tdkphy_methods, 84 sizeof(struct mii_softc) 85}; 86 87DRIVER_MODULE(tdkphy, miibus, tdkphy_driver, tdkphy_devclass, 0, 0); 88 89static int tdkphy_service(struct mii_softc *, struct mii_data *, int); 90static void tdkphy_status(struct mii_softc *); 91 92static const struct mii_phydesc tdkphys[] = { 93 MII_PHY_DESC(xxTSC, 78Q2120), 94 MII_PHY_END 95}; 96 97static const struct mii_phy_funcs tdkphy_funcs = { 98 tdkphy_service, 99 tdkphy_status, 100 mii_phy_reset 101}; 102 103static int 104tdkphy_probe(device_t dev) 105{ 106 107 return (mii_phy_dev_probe(dev, tdkphys, BUS_PROBE_DEFAULT)); 108} 109 110static int 111tdkphy_attach(device_t dev) 112{ 113 114 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &tdkphy_funcs, 1); 115 return (0); 116} 117 118static int 119tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 120{ 121 122 switch (cmd) { 123 case MII_POLLSTAT: 124 break; 125 126 case MII_MEDIACHG: 127 mii_phy_setmedia(sc); 128 break; 129 130 case MII_TICK: 131 if (mii_phy_tick(sc) == EJUSTRETURN) 132 return (0); 133 break; 134 } 135 136 /* Update the media status. */ 137 PHY_STATUS(sc); 138 if (sc->mii_pdata->mii_media_active & IFM_FDX) 139 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX); 140 else 141 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX); 142 143 /* Callback if something changed. */ 144 mii_phy_update(sc, cmd); 145 return (0); 146} 147 148static void 149tdkphy_status(struct mii_softc *phy) 150{ 151 struct mii_data *mii = phy->mii_pdata; 152 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 153 int bmsr, bmcr, anlpar, diag; 154 155 mii->mii_media_status = IFM_AVALID; 156 mii->mii_media_active = IFM_ETHER; 157 158 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 159 if (bmsr & BMSR_LINK) 160 mii->mii_media_status |= IFM_ACTIVE; 161 162 bmcr = PHY_READ(phy, MII_BMCR); 163 if (bmcr & BMCR_ISO) { 164 mii->mii_media_active |= IFM_NONE; 165 mii->mii_media_status = 0; 166 return; 167 } 168 169 if (bmcr & BMCR_LOOP) 170 mii->mii_media_active |= IFM_LOOP; 171 172 if (bmcr & BMCR_AUTOEN) { 173 /* 174 * NWay autonegotiation takes the highest-order common 175 * bit of the ANAR and ANLPAR (i.e. best media advertised 176 * both by us and our link partner). 177 */ 178 if ((bmsr & BMSR_ACOMP) == 0) { 179 /* Erg, still trying, I guess... */ 180 mii->mii_media_active |= IFM_NONE; 181 return; 182 } 183 184 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR); 185 /* 186 * ANLPAR doesn't get set on my card, but we check it anyway, 187 * since it is mentioned in the 78Q2120 specs. 188 */ 189 if (anlpar & ANLPAR_TX_FD) 190 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 191 else if (anlpar & ANLPAR_T4) 192 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 193 else if (anlpar & ANLPAR_TX) 194 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 195 else if (anlpar & ANLPAR_10_FD) 196 mii->mii_media_active |= IFM_10_T|IFM_FDX; 197 else if (anlpar & ANLPAR_10) 198 mii->mii_media_active |= IFM_10_T|IFM_HDX; 199 else { 200 /* 201 * ANLPAR isn't set, which leaves two possibilities: 202 * 1) Auto negotiation failed 203 * 2) Auto negotiation completed, but the card forgot 204 * to set ANLPAR. 205 * So we check the MII_DIAG(18) register... 206 */ 207 diag = PHY_READ(phy, MII_DIAG); 208 if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */ 209 mii->mii_media_active |= IFM_10_T|IFM_HDX; 210 else { 211 if (diag & DIAG_DUPLEX) 212 mii->mii_media_active |= IFM_FDX; 213 else 214 mii->mii_media_active |= IFM_HDX; 215 if (diag & DIAG_RATE_100) 216 mii->mii_media_active |= IFM_100_TX; 217 else 218 mii->mii_media_active |= IFM_10_T; 219 } 220 } 221 if ((mii->mii_media_active & IFM_FDX) != 0) 222 mii->mii_media_active |= mii_phy_flowstatus(phy); 223 } else 224 mii->mii_media_active = ife->ifm_media; 225} 226