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 67 static int tdkphy_probe(device_t); 68 static int tdkphy_attach(device_t); 69 70 static 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 79 static driver_t tdkphy_driver = { 80 "tdkphy", 81 tdkphy_methods, 82 sizeof(struct mii_softc) 83 }; 84 85 DRIVER_MODULE(tdkphy, miibus, tdkphy_driver, 0, 0); 86 87 static int tdkphy_service(struct mii_softc *, struct mii_data *, int); 88 static void tdkphy_status(struct mii_softc *); 89 90 static const struct mii_phydesc tdkphys[] = { 91 MII_PHY_DESC(xxTSC, 78Q2120), 92 MII_PHY_END 93 }; 94 95 static const struct mii_phy_funcs tdkphy_funcs = { 96 tdkphy_service, 97 tdkphy_status, 98 mii_phy_reset 99 }; 100 101 static int 102 tdkphy_probe(device_t dev) 103 { 104 105 return (mii_phy_dev_probe(dev, tdkphys, BUS_PROBE_DEFAULT)); 106 } 107 108 static int 109 tdkphy_attach(device_t dev) 110 { 111 112 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &tdkphy_funcs, 1); 113 return (0); 114 } 115 116 static int 117 tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 118 { 119 120 switch (cmd) { 121 case MII_POLLSTAT: 122 break; 123 124 case MII_MEDIACHG: 125 mii_phy_setmedia(sc); 126 break; 127 128 case MII_TICK: 129 if (mii_phy_tick(sc) == EJUSTRETURN) 130 return (0); 131 break; 132 } 133 134 /* Update the media status. */ 135 PHY_STATUS(sc); 136 if (sc->mii_pdata->mii_media_active & IFM_FDX) 137 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX); 138 else 139 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX); 140 141 /* Callback if something changed. */ 142 mii_phy_update(sc, cmd); 143 return (0); 144 } 145 146 static void 147 tdkphy_status(struct mii_softc *phy) 148 { 149 struct mii_data *mii = phy->mii_pdata; 150 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 151 int bmsr, bmcr, anlpar, diag; 152 153 mii->mii_media_status = IFM_AVALID; 154 mii->mii_media_active = IFM_ETHER; 155 156 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 157 if (bmsr & BMSR_LINK) 158 mii->mii_media_status |= IFM_ACTIVE; 159 160 bmcr = PHY_READ(phy, MII_BMCR); 161 if (bmcr & BMCR_ISO) { 162 mii->mii_media_active |= IFM_NONE; 163 mii->mii_media_status = 0; 164 return; 165 } 166 167 if (bmcr & BMCR_LOOP) 168 mii->mii_media_active |= IFM_LOOP; 169 170 if (bmcr & BMCR_AUTOEN) { 171 /* 172 * NWay autonegotiation takes the highest-order common 173 * bit of the ANAR and ANLPAR (i.e. best media advertised 174 * both by us and our link partner). 175 */ 176 if ((bmsr & BMSR_ACOMP) == 0) { 177 /* Erg, still trying, I guess... */ 178 mii->mii_media_active |= IFM_NONE; 179 return; 180 } 181 182 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR); 183 /* 184 * ANLPAR doesn't get set on my card, but we check it anyway, 185 * since it is mentioned in the 78Q2120 specs. 186 */ 187 if (anlpar & ANLPAR_TX_FD) 188 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 189 else if (anlpar & ANLPAR_T4) 190 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 191 else if (anlpar & ANLPAR_TX) 192 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 193 else if (anlpar & ANLPAR_10_FD) 194 mii->mii_media_active |= IFM_10_T|IFM_FDX; 195 else if (anlpar & ANLPAR_10) 196 mii->mii_media_active |= IFM_10_T|IFM_HDX; 197 else { 198 /* 199 * ANLPAR isn't set, which leaves two possibilities: 200 * 1) Auto negotiation failed 201 * 2) Auto negotiation completed, but the card forgot 202 * to set ANLPAR. 203 * So we check the MII_DIAG(18) register... 204 */ 205 diag = PHY_READ(phy, MII_DIAG); 206 if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */ 207 mii->mii_media_active |= IFM_10_T|IFM_HDX; 208 else { 209 if (diag & DIAG_DUPLEX) 210 mii->mii_media_active |= IFM_FDX; 211 else 212 mii->mii_media_active |= IFM_HDX; 213 if (diag & DIAG_RATE_100) 214 mii->mii_media_active |= IFM_100_TX; 215 else 216 mii->mii_media_active |= IFM_10_T; 217 } 218 } 219 if ((mii->mii_media_active & IFM_FDX) != 0) 220 mii->mii_media_active |= mii_phy_flowstatus(phy); 221 } else 222 mii->mii_media_active = ife->ifm_media; 223 } 224