exphy.c revision 1.10
1 /* $NetBSD: exphy.c,v 1.10 1998/11/04 22:15:40 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center, and by Frank van der Linden. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by Manuel Bouyer. 54 * 4. The name of the author may not be used to endorse or promote products 55 * derived from this software without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 58 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 59 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 60 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 61 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 62 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 63 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 64 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 65 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 66 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 /* 70 * driver for 3Com internal PHYs 71 */ 72 73 #include <sys/param.h> 74 #include <sys/systm.h> 75 #include <sys/kernel.h> 76 #include <sys/device.h> 77 #include <sys/malloc.h> 78 #include <sys/socket.h> 79 80 #include <net/if.h> 81 #include <net/if_media.h> 82 83 #include <dev/mii/mii.h> 84 #include <dev/mii/miivar.h> 85 #include <dev/mii/miidevs.h> 86 87 struct exphy_softc { 88 struct mii_softc sc_mii; /* generic PHY */ 89 int sc_capabilities; 90 int sc_active; 91 }; 92 93 int exphymatch __P((struct device *, struct cfdata *, void *)); 94 void exphyattach __P((struct device *, struct device *, void *)); 95 96 struct cfattach exphy_ca = { 97 sizeof(struct exphy_softc), exphymatch, exphyattach 98 }; 99 100 int exphy_service __P((struct mii_softc *, struct mii_data *, int)); 101 void exphy_reset __P((struct exphy_softc *)); 102 void exphy_auto __P((struct exphy_softc *)); 103 void exphy_status __P((struct exphy_softc *)); 104 105 int 106 exphymatch(parent, match, aux) 107 struct device *parent; 108 struct cfdata *match; 109 void *aux; 110 { 111 struct mii_attach_args *ma = aux; 112 113 /* 114 * Argh, 3Com PHY reports oui == 0 model == 0! 115 */ 116 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 && 117 MII_MODEL(ma->mii_id2) != 0) 118 return (0); 119 120 /* 121 * Make sure the parent is an `ex'. 122 */ 123 if (strcmp(parent->dv_cfdata->cf_driver->cd_name, "ex") != 0) 124 return (0); 125 126 return (1); 127 } 128 129 void 130 exphyattach(parent, self, aux) 131 struct device *parent, *self; 132 void *aux; 133 { 134 struct exphy_softc *sc = (struct exphy_softc *)self; 135 struct mii_attach_args *ma = aux; 136 struct mii_data *mii = ma->mii_data; 137 138 printf(": 3Com internal media interface\n"); 139 140 sc->sc_mii.mii_inst = mii->mii_instance; 141 sc->sc_mii.mii_phy = ma->mii_phyno; 142 sc->sc_mii.mii_service = exphy_service; 143 sc->sc_mii.mii_pdata = mii; 144 145 /* 146 * The 3Com PHY can never be isolated, so never allow non-zero 147 * instances! 148 */ 149 if (mii->mii_instance != 0) { 150 printf("%s: ignoring this PHY, non-zero instance\n", 151 sc->sc_mii.mii_dev.dv_xname); 152 return; 153 } 154 155 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 156 157 #if 0 /* See above. */ 158 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->sc_mii.mii_inst), 159 BMCR_ISO); 160 #endif 161 162 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->sc_mii.mii_inst), 163 BMCR_LOOP|BMCR_S100); 164 165 exphy_reset(sc); 166 167 sc->sc_capabilities = PHY_READ(&sc->sc_mii, MII_BMSR) & ma->mii_capmask; 168 printf("%s: ", sc->sc_mii.mii_dev.dv_xname); 169 if ((sc->sc_capabilities & BMSR_MEDIAMASK) == 0) 170 printf("no media present"); 171 else 172 mii_add_media(mii, sc->sc_capabilities, sc->sc_mii.mii_inst); 173 printf("\n"); 174 #undef ADD 175 } 176 177 int 178 exphy_service(self, mii, cmd) 179 struct mii_softc *self; 180 struct mii_data *mii; 181 int cmd; 182 { 183 struct exphy_softc *sc = (struct exphy_softc *)self; 184 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 185 186 /* 187 * We can't isolate the 3Com PHY, so it has to be the only one! 188 */ 189 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) 190 panic("exphy_service: can't isolate 3Com PHY"); 191 192 switch (cmd) { 193 case MII_POLLSTAT: 194 break; 195 196 case MII_MEDIACHG: 197 /* 198 * If the interface is not up, don't do anything. 199 */ 200 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 201 break; 202 203 switch (IFM_SUBTYPE(ife->ifm_media)) { 204 case IFM_AUTO: 205 /* 206 * If we're already in auto mode, just return. 207 */ 208 if (PHY_READ(&sc->sc_mii, MII_BMCR) & BMCR_AUTOEN) 209 return (0); 210 exphy_auto(sc); 211 break; 212 case IFM_100_T4: 213 /* 214 * XXX Not supported as a manual setting right now. 215 */ 216 return (EINVAL); 217 default: 218 /* 219 * BMCR data is stored in the ifmedia entry. 220 */ 221 PHY_WRITE(&sc->sc_mii, MII_ANAR, 222 mii_anar(ife->ifm_media)); 223 PHY_WRITE(&sc->sc_mii, MII_BMCR, ife->ifm_data); 224 } 225 break; 226 227 case MII_TICK: 228 /* 229 * Only used for autonegotiation. 230 */ 231 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 232 return (0); 233 234 /* 235 * Is the interface even up? 236 */ 237 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 238 return (0); 239 240 /* 241 * The 3Com PHY's autonegotiation doesn't need to be 242 * kicked; it continues in the background. 243 */ 244 break; 245 } 246 247 /* Update the media status. */ 248 exphy_status(sc); 249 250 /* Callback if something changed. */ 251 if (sc->sc_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 252 (*mii->mii_statchg)(sc->sc_mii.mii_dev.dv_parent); 253 sc->sc_active = mii->mii_media_active; 254 } 255 return (0); 256 } 257 258 void 259 exphy_status(sc) 260 struct exphy_softc *sc; 261 { 262 struct mii_data *mii = sc->sc_mii.mii_pdata; 263 int bmsr, bmcr, anlpar; 264 265 mii->mii_media_status = IFM_AVALID; 266 mii->mii_media_active = IFM_ETHER; 267 268 bmsr = PHY_READ(&sc->sc_mii, MII_BMSR) | 269 PHY_READ(&sc->sc_mii, MII_BMSR); 270 if (bmsr & BMSR_LINK) 271 mii->mii_media_status |= IFM_ACTIVE; 272 273 bmcr = PHY_READ(&sc->sc_mii, MII_BMCR); 274 if (bmcr & BMCR_ISO) { 275 mii->mii_media_active |= IFM_NONE; 276 mii->mii_media_status = 0; 277 return; 278 } 279 280 if (bmcr & BMCR_LOOP) 281 mii->mii_media_active |= IFM_LOOP; 282 283 if (bmcr & BMCR_AUTOEN) { 284 /* 285 * The 3Com PHY uses the highest-order common bit of 286 * the ANAR and ANLPAR (i.e. best media advertised 287 * both by us and our link partner). 288 */ 289 if ((bmsr & BMSR_ACOMP) == 0) { 290 /* Erg, still trying, I guess... */ 291 mii->mii_media_active |= IFM_NONE; 292 return; 293 } 294 295 anlpar = PHY_READ(&sc->sc_mii, MII_ANAR) & 296 PHY_READ(&sc->sc_mii, MII_ANLPAR); 297 if (anlpar & ANLPAR_T4) 298 mii->mii_media_active |= IFM_100_T4; 299 else if (anlpar & ANLPAR_TX_FD) 300 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 301 else if (anlpar & ANLPAR_TX) 302 mii->mii_media_active |= IFM_100_TX; 303 else if (anlpar & ANLPAR_10_FD) 304 mii->mii_media_active |= IFM_10_T|IFM_FDX; 305 else if (anlpar & ANLPAR_10) 306 mii->mii_media_active |= IFM_10_T; 307 else 308 mii->mii_media_active |= IFM_NONE; 309 } else { 310 if (bmcr & BMCR_S100) 311 mii->mii_media_active |= IFM_100_TX; 312 else 313 mii->mii_media_active |= IFM_10_T; 314 if (bmcr & BMCR_FDX) 315 mii->mii_media_active |= IFM_FDX; 316 } 317 } 318 319 void 320 exphy_auto(sc) 321 struct exphy_softc *sc; 322 { 323 int bmsr, i; 324 325 PHY_WRITE(&sc->sc_mii, MII_ANAR, 326 BMSR_MEDIA_TO_ANAR(sc->sc_capabilities) | ANAR_CSMA); 327 PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 328 329 /* Wait 500ms for it to complete. */ 330 for (i = 0; i < 500; i++) { 331 if ((bmsr = PHY_READ(&sc->sc_mii, MII_BMSR)) & BMSR_ACOMP) 332 return; 333 delay(1000); 334 } 335 #if 0 336 if ((bmsr & BMSR_ACOMP) == 0) 337 printf("%s: autonegotiation failed to complete\n", 338 sc->sc_mii.mii_dev.dv_xname); 339 #endif 340 } 341 342 void 343 exphy_reset(sc) 344 struct exphy_softc *sc; 345 { 346 int reg, i; 347 348 PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_RESET); 349 350 /* Wait 100ms for it to complete. */ 351 for (i = 0; i < 100; i++) { 352 reg = PHY_READ(&sc->sc_mii, MII_BMCR); 353 if ((reg & BMCR_RESET) == 0) 354 break; 355 delay(1000); 356 } 357 358 /* 359 * XXX 3Com PHY doesn't set the BMCR properly after 360 * XXX reset, which breaks autonegotiation. 361 */ 362 PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_S100|BMCR_AUTOEN|BMCR_FDX); 363 } 364
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