1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 /* 33 * Driver for the TDK 78Q2120 MII 34 * 35 * References: 36 * Datasheet for the 78Q2120 - http://www.tsc.tdk.com/lan/78q2120.pdf 37 * Most of this code stolen from ukphy.c 38 */ 39 40 /* 41 * The TDK 78Q2120 is found on some Xircom X3201 based CardBus cards, 42 * also spotted on some 3C575 cards. It's just like any other normal 43 * phy, except it does auto negotiation in a different way. 44 */ 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/socket.h> 50 #include <sys/errno.h> 51 #include <sys/module.h> 52 #include <sys/bus.h> 53 54 #include <net/if.h> 55 #include <net/if_media.h> 56 57 #include <dev/mii/mii.h> 58 #include <dev/mii/miivar.h> 59 #include "miidevs.h" 60 61 #include <dev/mii/tdkphyreg.h> 62 63 #include "miibus_if.h" 64 65 static int tdkphy_probe(device_t); 66 static int tdkphy_attach(device_t); 67 68 static device_method_t tdkphy_methods[] = { 69 /* device interface */ 70 DEVMETHOD(device_probe, tdkphy_probe), 71 DEVMETHOD(device_attach, tdkphy_attach), 72 DEVMETHOD(device_detach, mii_phy_detach), 73 DEVMETHOD(device_shutdown, bus_generic_shutdown), 74 DEVMETHOD_END 75 }; 76 77 static driver_t tdkphy_driver = { 78 "tdkphy", 79 tdkphy_methods, 80 sizeof(struct mii_softc) 81 }; 82 83 DRIVER_MODULE(tdkphy, miibus, tdkphy_driver, 0, 0); 84 85 static int tdkphy_service(struct mii_softc *, struct mii_data *, int); 86 static void tdkphy_status(struct mii_softc *); 87 88 static const struct mii_phydesc tdkphys[] = { 89 MII_PHY_DESC(xxTSC, 78Q2120), 90 MII_PHY_END 91 }; 92 93 static const struct mii_phy_funcs tdkphy_funcs = { 94 tdkphy_service, 95 tdkphy_status, 96 mii_phy_reset 97 }; 98 99 static int 100 tdkphy_probe(device_t dev) 101 { 102 103 return (mii_phy_dev_probe(dev, tdkphys, BUS_PROBE_DEFAULT)); 104 } 105 106 static int 107 tdkphy_attach(device_t dev) 108 { 109 110 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &tdkphy_funcs, 1); 111 return (0); 112 } 113 114 static int 115 tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 116 { 117 118 switch (cmd) { 119 case MII_POLLSTAT: 120 break; 121 122 case MII_MEDIACHG: 123 mii_phy_setmedia(sc); 124 break; 125 126 case MII_TICK: 127 if (mii_phy_tick(sc) == EJUSTRETURN) 128 return (0); 129 break; 130 } 131 132 /* Update the media status. */ 133 PHY_STATUS(sc); 134 if (sc->mii_pdata->mii_media_active & IFM_FDX) 135 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX); 136 else 137 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX); 138 139 /* Callback if something changed. */ 140 mii_phy_update(sc, cmd); 141 return (0); 142 } 143 144 static void 145 tdkphy_status(struct mii_softc *phy) 146 { 147 struct mii_data *mii = phy->mii_pdata; 148 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 149 int bmsr, bmcr, anlpar, diag; 150 151 mii->mii_media_status = IFM_AVALID; 152 mii->mii_media_active = IFM_ETHER; 153 154 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 155 if (bmsr & BMSR_LINK) 156 mii->mii_media_status |= IFM_ACTIVE; 157 158 bmcr = PHY_READ(phy, MII_BMCR); 159 if (bmcr & BMCR_ISO) { 160 mii->mii_media_active |= IFM_NONE; 161 mii->mii_media_status = 0; 162 return; 163 } 164 165 if (bmcr & BMCR_LOOP) 166 mii->mii_media_active |= IFM_LOOP; 167 168 if (bmcr & BMCR_AUTOEN) { 169 /* 170 * NWay autonegotiation takes the highest-order common 171 * bit of the ANAR and ANLPAR (i.e. best media advertised 172 * both by us and our link partner). 173 */ 174 if ((bmsr & BMSR_ACOMP) == 0) { 175 /* Erg, still trying, I guess... */ 176 mii->mii_media_active |= IFM_NONE; 177 return; 178 } 179 180 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR); 181 /* 182 * ANLPAR doesn't get set on my card, but we check it anyway, 183 * since it is mentioned in the 78Q2120 specs. 184 */ 185 if (anlpar & ANLPAR_TX_FD) 186 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 187 else if (anlpar & ANLPAR_T4) 188 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 189 else if (anlpar & ANLPAR_TX) 190 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 191 else if (anlpar & ANLPAR_10_FD) 192 mii->mii_media_active |= IFM_10_T|IFM_FDX; 193 else if (anlpar & ANLPAR_10) 194 mii->mii_media_active |= IFM_10_T|IFM_HDX; 195 else { 196 /* 197 * ANLPAR isn't set, which leaves two possibilities: 198 * 1) Auto negotiation failed 199 * 2) Auto negotiation completed, but the card forgot 200 * to set ANLPAR. 201 * So we check the MII_DIAG(18) register... 202 */ 203 diag = PHY_READ(phy, MII_DIAG); 204 if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */ 205 mii->mii_media_active |= IFM_10_T|IFM_HDX; 206 else { 207 if (diag & DIAG_DUPLEX) 208 mii->mii_media_active |= IFM_FDX; 209 else 210 mii->mii_media_active |= IFM_HDX; 211 if (diag & DIAG_RATE_100) 212 mii->mii_media_active |= IFM_100_TX; 213 else 214 mii->mii_media_active |= IFM_10_T; 215 } 216 } 217 if ((mii->mii_media_active & IFM_FDX) != 0) 218 mii->mii_media_active |= mii_phy_flowstatus(phy); 219 } else 220 mii->mii_media_active = ife->ifm_media; 221 } 222