tlphy.c revision 1.8
1 /* $NetBSD: tlphy.c,v 1.8 1998/08/12 20:46:47 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. 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 Texas Instruments's ThunderLAN 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/socket.h> 78 79 #include <machine/bus.h> 80 81 #include <net/if.h> 82 #include <net/if_media.h> 83 84 #include <net/if_ether.h> 85 86 #include <dev/mii/mii.h> 87 #include <dev/mii/miivar.h> 88 #include <dev/mii/miidevs.h> 89 90 #include <dev/i2c/i2c_bus.h> 91 92 #include <dev/mii/tlphyreg.h> 93 #include <dev/mii/tlphyvar.h> 94 95 /* ThunderLAN PHY can only be on a ThunderLAN */ 96 #include <dev/pci/if_tlvar.h> 97 98 struct tlphy_softc { 99 struct mii_softc sc_mii; /* generic PHY */ 100 int sc_capabilities; 101 int sc_ticks; 102 int sc_tlphycap; 103 int sc_active; 104 }; 105 106 int tlphymatch __P((struct device *, struct cfdata *, void *)); 107 void tlphyattach __P((struct device *, struct device *, void *)); 108 109 struct cfattach tlphy_ca = { 110 sizeof(struct tlphy_softc), tlphymatch, tlphyattach 111 }; 112 113 #define TLPHY_READ(sc, reg) \ 114 (*(sc)->sc_mii.mii_pdata->mii_readreg)((sc)->sc_mii.mii_dev.dv_parent, \ 115 (sc)->sc_mii.mii_phy, (reg)) 116 117 #define TLPHY_WRITE(sc, reg, val) \ 118 (*(sc)->sc_mii.mii_pdata->mii_writereg)((sc)->sc_mii.mii_dev.dv_parent, \ 119 (sc)->sc_mii.mii_phy, (reg), (val)) 120 121 int tlphy_service __P((struct mii_softc *, struct mii_data *, int)); 122 void tlphy_reset __P((struct tlphy_softc *)); 123 void tlphy_auto __P((struct tlphy_softc *)); 124 void tlphy_status __P((struct tlphy_softc *)); 125 126 int 127 tlphymatch(parent, match, aux) 128 struct device *parent; 129 struct cfdata *match; 130 void *aux; 131 { 132 struct mii_attach_args *ma = aux; 133 134 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_TI && 135 MII_MODEL(ma->mii_id2) == MII_MODEL_TI_TLAN10T) 136 return (1); 137 138 return (0); 139 } 140 141 void 142 tlphyattach(parent, self, aux) 143 struct device *parent, *self; 144 void *aux; 145 { 146 struct tlphy_softc *sc = (struct tlphy_softc *)self; 147 struct tl_softc *tlsc = (struct tl_softc *)self->dv_parent; 148 struct mii_attach_args *ma = aux; 149 struct mii_data *mii = ma->mii_data; 150 const char *sep = ""; 151 152 printf(": %s, rev. %d\n", MII_STR_TI_TLAN10T, 153 MII_REV(ma->mii_id2)); 154 155 sc->sc_mii.mii_inst = mii->mii_instance; 156 sc->sc_mii.mii_phy = ma->mii_phyno; 157 sc->sc_mii.mii_service = tlphy_service; 158 sc->sc_mii.mii_pdata = mii; 159 160 tlphy_reset(sc); 161 162 /* 163 * Note that if we're on a device that also supports 100baseTX, 164 * we are not going to want to use the built-in 10baseT port, 165 * since there will be another PHY on the MII wired up to the 166 * UTP connector. The parent indicates this to us by specifying 167 * the TLPHY_MEDIA_NO_10_T bit. 168 */ 169 sc->sc_tlphycap = tlsc->tl_product->tp_tlphymedia; 170 if ((sc->sc_tlphycap & TLPHY_MEDIA_NO_10_T) == 0) 171 sc->sc_capabilities = 172 TLPHY_READ(sc, MII_BMSR) & ma->mii_capmask; 173 else 174 sc->sc_capabilities = 0; 175 176 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 177 178 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->sc_mii.mii_inst), 179 BMCR_ISO); 180 181 if ((sc->sc_tlphycap & TLPHY_MEDIA_NO_10_T) == 0) 182 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_LOOP, 183 sc->sc_mii.mii_inst), BMCR_LOOP); 184 185 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 186 187 printf("%s: ", sc->sc_mii.mii_dev.dv_xname); 188 if (sc->sc_tlphycap) { 189 if (sc->sc_tlphycap == TLPHY_MEDIA_10_2) { 190 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_2, 0, 191 sc->sc_mii.mii_inst), 0); 192 PRINT("10base2/BNC"); 193 } else { 194 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, 195 sc->sc_mii.mii_inst), 0); 196 PRINT("10base5/AUI"); 197 } 198 } 199 if (sc->sc_capabilities & BMSR_MEDIAMASK) { 200 printf(sep); 201 mii_add_media(mii, sc->sc_capabilities, sc->sc_mii.mii_inst); 202 } else if (sc->sc_tlphycap == 0) 203 printf("no media present"); 204 printf("\n"); 205 #undef ADD 206 #undef PRINT 207 } 208 209 int 210 tlphy_service(self, mii, cmd) 211 struct mii_softc *self; 212 struct mii_data *mii; 213 int cmd; 214 { 215 struct tlphy_softc *sc = (struct tlphy_softc *)self; 216 int reg; 217 218 switch (cmd) { 219 case MII_POLLSTAT: 220 /* 221 * If we're not polling our PHY instance, just return. 222 */ 223 if (IFM_INST(mii->mii_media.ifm_media) != 224 sc->sc_mii.mii_inst) 225 return (0); 226 break; 227 228 case MII_MEDIACHG: 229 /* 230 * If the media indicates a different PHY instance, 231 * isolate ourselves. 232 */ 233 if (IFM_INST(mii->mii_media.ifm_media) != 234 sc->sc_mii.mii_inst) { 235 reg = TLPHY_READ(sc, MII_BMCR); 236 TLPHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 237 return (0); 238 } 239 240 /* 241 * If the interface is not up, don't do anything. 242 */ 243 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 244 break; 245 246 switch (IFM_SUBTYPE(mii->mii_media.ifm_media)) { 247 case IFM_AUTO: 248 /* 249 * The ThunderLAN PHY doesn't self-configure after 250 * an autonegotiation cycle, so there's no such 251 * thing as "already in auto mode". 252 */ 253 tlphy_auto(sc); 254 break; 255 case IFM_10_2: 256 case IFM_10_5: 257 TLPHY_WRITE(sc, MII_BMCR, 0); 258 TLPHY_WRITE(sc, MII_TLPHY_CTRL, CTRL_AUISEL); 259 delay(100000); 260 break; 261 default: 262 TLPHY_WRITE(sc, MII_TLPHY_CTRL, 0); 263 delay(100000); 264 TLPHY_WRITE(sc, MII_ANAR, 265 mii_anar(mii->mii_media.ifm_media)); 266 TLPHY_WRITE(sc, MII_BMCR, 267 mii->mii_media.ifm_cur->ifm_data); 268 } 269 break; 270 271 case MII_TICK: 272 /* 273 * If we're not currently selected, just return. 274 */ 275 if (IFM_INST(mii->mii_media.ifm_media) != 276 sc->sc_mii.mii_inst) 277 return (0); 278 279 /* 280 * Only used for autonegotiation. 281 */ 282 if (IFM_SUBTYPE(mii->mii_media.ifm_media) != IFM_AUTO) 283 return (0); 284 285 /* 286 * Is the interface even up? 287 */ 288 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 289 return (0); 290 291 /* 292 * Check to see if we have link. If we do, we don't 293 * need to restart the autonegotiation process. Read 294 * the BMSR twice in case it's latched. 295 * 296 * XXX WHAT ABOUT CHECKING LINK ON THE BNC/AUI?! 297 */ 298 reg = TLPHY_READ(sc, MII_BMSR) | TLPHY_READ(sc, MII_BMSR); 299 if (reg & BMSR_LINK) 300 return (0); 301 302 /* 303 * Only retry autonegotiation every 5 seconds. 304 */ 305 if (++sc->sc_ticks != 5) 306 return (0); 307 308 sc->sc_ticks = 0; 309 tlphy_reset(sc); 310 tlphy_auto(sc); 311 break; 312 } 313 314 /* Update the media status. */ 315 tlphy_status(sc); 316 317 /* Callback if something changed. */ 318 if (sc->sc_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 319 (*mii->mii_statchg)(sc->sc_mii.mii_dev.dv_parent); 320 sc->sc_active = mii->mii_media_active; 321 } 322 return (0); 323 } 324 325 void 326 tlphy_status(sc) 327 struct tlphy_softc *sc; 328 { 329 struct mii_data *mii = sc->sc_mii.mii_pdata; 330 int bmsr, bmcr, tlctrl; 331 332 mii->mii_media_status = IFM_AVALID; 333 mii->mii_media_active = IFM_ETHER; 334 335 bmsr = TLPHY_READ(sc, MII_BMSR) | TLPHY_READ(sc, MII_BMSR); 336 if (bmsr & BMSR_LINK) 337 mii->mii_media_status |= IFM_ACTIVE; 338 339 bmcr = TLPHY_READ(sc, MII_BMCR); 340 if (bmcr & BMCR_ISO) { 341 mii->mii_media_active |= IFM_NONE; 342 mii->mii_media_status = 0; 343 return; 344 } 345 346 tlctrl = TLPHY_READ(sc, MII_TLPHY_CTRL); 347 if (tlctrl & CTRL_AUISEL) { 348 if (sc->sc_tlphycap == TLPHY_MEDIA_10_2) 349 mii->mii_media_status |= IFM_10_2; 350 else 351 mii->mii_media_status |= IFM_10_5; 352 /* XXX Can we sense carrier here? */ 353 mii->mii_media_status = 0; 354 return; 355 } 356 357 if (bmcr & BMCR_LOOP) 358 mii->mii_media_active |= IFM_LOOP; 359 360 /* 361 * Grr, braindead ThunderLAN PHY doesn't have any way to 362 * tell which media is actually active. (Note it also 363 * doesn't self-configure after autonegotiation.) We 364 * just have to report what's in the BMCR. 365 */ 366 if (bmcr & BMCR_FDX) 367 mii->mii_media_active |= IFM_FDX; 368 mii->mii_media_active |= IFM_10_T; 369 } 370 371 void 372 tlphy_auto(sc) 373 struct tlphy_softc *sc; 374 { 375 int aner, anlpar, bmsr, i; 376 377 TLPHY_WRITE(sc, MII_ANAR, 378 BMSR_MEDIA_TO_ANAR(sc->sc_capabilities) | ANAR_CSMA); 379 TLPHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 380 381 /* Wait 500ms for it to complete. */ 382 for (i = 0; i < 500; i++) { 383 if ((bmsr = TLPHY_READ(sc, MII_BMSR)) & BMSR_ACOMP) 384 return; 385 delay(1000); 386 } 387 if ((bmsr & BMSR_ACOMP) == 0) { 388 #if 0 389 printf("%s: autonegotiation failed to complete\n", 390 sc->sc_mii.mii_dev.dv_xname); 391 #endif 392 goto default; 393 } 394 395 /* 396 * Grr, braindead ThunderLAN PHY doesn't self-configure 397 * after autonegotiation. We have to do it ourselves 398 * based on the link partner status. 399 */ 400 401 aner = TLPHY_READ(sc, MII_ANER); 402 if (aner & ANER_LPAN) { 403 anlpar = TLPHY_READ(sc, MII_ANLPAR) & 404 TLPHY_READ(sc, MII_ANAR); 405 if (anlpar & ANAR_10_FD) { 406 TLPHY_WRITE(sc, MII_BMCR, BMCR_FDX); 407 return; 408 } 409 } 410 411 default: 412 /* 413 * Just assume we're not in full-duplex mode. 414 * XXX Check link and try AUI/BNC? 415 */ 416 TLPHY_WRITE(sc, MII_BMCR, 0); 417 } 418 419 void 420 tlphy_reset(sc) 421 struct tlphy_softc *sc; 422 { 423 int reg, i; 424 425 TLPHY_WRITE(sc, MII_BMCR, BMCR_RESET|BMCR_ISO); 426 427 /* Wait 100ms for it to complete. */ 428 for (i = 0; i < 100; i++) { 429 reg = TLPHY_READ(sc, MII_BMCR); 430 if ((reg & BMCR_RESET) == 0) 431 break; 432 delay(1000); 433 } 434 435 /* Make sure the PHY is isolated. */ 436 if (sc->sc_mii.mii_inst != 0) 437 TLPHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 438 } 439
Indexes created Tue Sep 23 07:09:52 GMT 2025