1 /*- 2 * Copyright (c) 2000,2001 Jonathan Chen. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions, and the following disclaimer, 10 * without modification, immediately at the beginning of the file. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in 13 * the documentation and/or other materials provided with the 14 * distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 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 { 0, 0 } 75 }; 76 77 static devclass_t tdkphy_devclass; 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, tdkphy_devclass, 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(TDK, 78Q2120), 92 MII_PHY_END 93 }; 94 95 static int 96 tdkphy_probe(device_t dev) 97 { 98 99 return (mii_phy_dev_probe(dev, tdkphys, BUS_PROBE_DEFAULT)); 100 } 101 102 static int 103 tdkphy_attach(device_t dev) 104 { 105 struct mii_softc *sc; 106 struct mii_attach_args *ma; 107 struct mii_data *mii; 108 sc = device_get_softc(dev); 109 ma = device_get_ivars(dev); 110 sc->mii_dev = device_get_parent(dev); 111 mii = device_get_softc(sc->mii_dev); 112 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 113 114 if (bootverbose) 115 device_printf(dev, "OUI 0x%06x, model 0x%04x, rev. %d\n", 116 MII_OUI(ma->mii_id1, ma->mii_id2), 117 MII_MODEL(ma->mii_id2), MII_REV(ma->mii_id2)); 118 119 sc->mii_inst = mii->mii_instance; 120 sc->mii_phy = ma->mii_phyno; 121 sc->mii_service = tdkphy_service; 122 sc->mii_pdata = mii; 123 124 mii->mii_instance++; 125 126 /* 127 * Apparently, we can't do loopback on this PHY. 128 */ 129 sc->mii_flags |= MIIF_NOLOOP; 130 131 mii_phy_reset(sc); 132 133 sc->mii_capabilities = 134 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 135 device_printf(dev, " "); 136 mii_phy_add_media(sc); 137 printf("\n"); 138 139 MIIBUS_MEDIAINIT(sc->mii_dev); 140 return (0); 141 } 142 143 static int 144 tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 145 { 146 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 147 int reg; 148 149 switch (cmd) { 150 case MII_POLLSTAT: 151 /* 152 * If we're not polling our PHY instance, just return. 153 */ 154 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 155 return (0); 156 break; 157 158 case MII_MEDIACHG: 159 /* 160 * If the media indicates a different PHY instance, 161 * isolate ourselves. 162 */ 163 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 164 reg = PHY_READ(sc, MII_BMCR); 165 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 166 return (0); 167 } 168 169 /* 170 * If the interface is not up, don't do anything. 171 */ 172 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 173 break; 174 175 mii_phy_setmedia(sc); 176 break; 177 178 case MII_TICK: 179 /* 180 * If we're not currently selected, just return. 181 */ 182 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 183 return (0); 184 if (mii_phy_tick(sc) == EJUSTRETURN) 185 return (0); 186 break; 187 } 188 189 /* Update the media status. */ 190 tdkphy_status(sc); 191 if (sc->mii_pdata->mii_media_active & IFM_FDX) 192 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX); 193 else 194 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX); 195 196 /* Callback if something changed. */ 197 mii_phy_update(sc, cmd); 198 return (0); 199 } 200 201 static void 202 tdkphy_status(struct mii_softc *phy) 203 { 204 struct mii_data *mii = phy->mii_pdata; 205 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 206 int bmsr, bmcr, anlpar, diag; 207 208 mii->mii_media_status = IFM_AVALID; 209 mii->mii_media_active = IFM_ETHER; 210 211 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 212 if (bmsr & BMSR_LINK) 213 mii->mii_media_status |= IFM_ACTIVE; 214 215 bmcr = PHY_READ(phy, MII_BMCR); 216 if (bmcr & BMCR_ISO) { 217 mii->mii_media_active |= IFM_NONE; 218 mii->mii_media_status = 0; 219 return; 220 } 221 222 if (bmcr & BMCR_LOOP) 223 mii->mii_media_active |= IFM_LOOP; 224 225 if (bmcr & BMCR_AUTOEN) { 226 /* 227 * NWay autonegotiation takes the highest-order common 228 * bit of the ANAR and ANLPAR (i.e. best media advertised 229 * both by us and our link partner). 230 */ 231 if ((bmsr & BMSR_ACOMP) == 0) { 232 /* Erg, still trying, I guess... */ 233 mii->mii_media_active |= IFM_NONE; 234 return; 235 } 236 237 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR); 238 /* 239 * ANLPAR doesn't get set on my card, but we check it anyway, 240 * since it is mentioned in the 78Q2120 specs. 241 */ 242 if (anlpar & ANLPAR_TX_FD) 243 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 244 else if (anlpar & ANLPAR_T4) 245 mii->mii_media_active |= IFM_100_T4; 246 else if (anlpar & ANLPAR_TX) 247 mii->mii_media_active |= IFM_100_TX; 248 else if (anlpar & ANLPAR_10_FD) 249 mii->mii_media_active |= IFM_10_T|IFM_FDX; 250 else if (anlpar & ANLPAR_10) 251 mii->mii_media_active |= IFM_10_T; 252 else { 253 /* 254 * ANLPAR isn't set, which leaves two possibilities: 255 * 1) Auto negotiation failed 256 * 2) Auto negotiation completed, but the card forgot 257 * to set ANLPAR. 258 * So we check the MII_DIAG(18) register... 259 */ 260 diag = PHY_READ(phy, MII_DIAG); 261 if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */ 262 mii->mii_media_active |= IFM_10_T; 263 else { 264 if (diag & DIAG_DUPLEX) 265 mii->mii_media_active |= IFM_FDX; 266 if (diag & DIAG_RATE_100) 267 mii->mii_media_active |= IFM_100_TX; 268 else 269 mii->mii_media_active |= IFM_10_T; 270 } 271 } 272 } else 273 mii->mii_media_active = ife->ifm_media; 274 } 275