Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/tlphy.c
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1 /* $NetBSD: tlphy.c,v 1.18 1999/05/14 11:40:28 drochner Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999 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/socket.h> 77 #include <sys/errno.h> 78 #include <sys/module.h> 79 #include <sys/bus.h> 80 #include <sys/malloc.h> 81 82 #include <machine/bus.h> 83 84 #include <net/if.h> 85 #include <net/if_media.h> 86 87 #include <dev/mii/mii.h> 88 #include <dev/mii/miivar.h> 89 #include <dev/mii/miidevs.h> 90 91 #include <dev/mii/tlphyreg.h> 92 93 #include "miibus_if.h" 94 95 #if !defined(lint) 96 static const char rcsid[] = 97 "$FreeBSD: releng/5.0/sys/dev/mii/tlphy.c 105135 2002-10-14 22:31:52Z alfred $"; 98 #endif 99 100 struct tlphy_softc { 101 struct mii_softc sc_mii; /* generic PHY */ 102 int sc_need_acomp; 103 }; 104 105 static int tlphy_probe(device_t); 106 static int tlphy_attach(device_t); 107 108 static device_method_t tlphy_methods[] = { 109 /* device interface */ 110 DEVMETHOD(device_probe, tlphy_probe), 111 DEVMETHOD(device_attach, tlphy_attach), 112 DEVMETHOD(device_detach, mii_phy_detach), 113 DEVMETHOD(device_shutdown, bus_generic_shutdown), 114 { 0, 0 } 115 }; 116 117 static devclass_t tlphy_devclass; 118 119 static driver_t tlphy_driver = { 120 "tlphy", 121 tlphy_methods, 122 sizeof(struct tlphy_softc) 123 }; 124 125 DRIVER_MODULE(tlphy, miibus, tlphy_driver, tlphy_devclass, 0, 0); 126 127 static int tlphy_service(struct mii_softc *, struct mii_data *, int); 128 static int tlphy_auto(struct tlphy_softc *); 129 static void tlphy_acomp(struct tlphy_softc *); 130 static void tlphy_status(struct tlphy_softc *); 131 132 static int 133 tlphy_probe(dev) 134 device_t dev; 135 { 136 struct mii_attach_args *ma; 137 138 ma = device_get_ivars(dev); 139 140 if (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxTI || 141 MII_MODEL(ma->mii_id2) != MII_MODEL_xxTI_TLAN10T) 142 return (ENXIO); 143 144 device_set_desc(dev, MII_STR_xxTI_TLAN10T); 145 146 return (0); 147 } 148 149 static int 150 tlphy_attach(dev) 151 device_t dev; 152 { 153 struct tlphy_softc *sc; 154 struct mii_attach_args *ma; 155 struct mii_data *mii; 156 const char *sep = ""; 157 int capmask = 0xFFFFFFFF; 158 159 sc = device_get_softc(dev); 160 ma = device_get_ivars(dev); 161 sc->sc_mii.mii_dev = device_get_parent(dev); 162 mii = device_get_softc(sc->sc_mii.mii_dev); 163 LIST_INSERT_HEAD(&mii->mii_phys, &sc->sc_mii, mii_list); 164 165 sc->sc_mii.mii_inst = mii->mii_instance; 166 sc->sc_mii.mii_phy = ma->mii_phyno; 167 sc->sc_mii.mii_service = tlphy_service; 168 sc->sc_mii.mii_pdata = mii; 169 170 if (mii->mii_instance) { 171 struct mii_softc *other; 172 device_t *devlist; 173 int devs, i; 174 175 device_get_children(sc->sc_mii.mii_dev, &devlist, &devs); 176 for (i = 0; i < devs; i++) { 177 if (strcmp(device_get_name(devlist[i]), "tlphy")) { 178 other = device_get_softc(devlist[i]); 179 capmask &= ~other->mii_capabilities; 180 break; 181 } 182 } 183 free(devlist, M_TEMP); 184 } 185 186 mii->mii_instance++; 187 188 sc->sc_mii.mii_flags &= ~MIIF_NOISOLATE; 189 mii_phy_reset(&sc->sc_mii); 190 sc->sc_mii.mii_flags |= MIIF_NOISOLATE; 191 192 /* 193 * Note that if we're on a device that also supports 100baseTX, 194 * we are not going to want to use the built-in 10baseT port, 195 * since there will be another PHY on the MII wired up to the 196 * UTP connector. The parent indicates this to us by specifying 197 * the TLPHY_MEDIA_NO_10_T bit. 198 */ 199 sc->sc_mii.mii_capabilities = 200 PHY_READ(&sc->sc_mii, MII_BMSR) & capmask /*ma->mii_capmask*/; 201 202 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 203 204 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->sc_mii.mii_inst), 205 BMCR_ISO); 206 207 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_LOOP, 208 sc->sc_mii.mii_inst), BMCR_LOOP); 209 210 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 211 212 device_printf(dev, " "); 213 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_2, 0, sc->sc_mii.mii_inst), 0); 214 PRINT("10base2/BNC"); 215 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, sc->sc_mii.mii_inst), 0); 216 PRINT("10base5/AUI"); 217 218 if (sc->sc_mii.mii_capabilities & BMSR_MEDIAMASK) { 219 printf("%s", sep); 220 mii_add_media(&sc->sc_mii); 221 } 222 223 printf("\n"); 224 #undef ADD 225 #undef PRINT 226 MIIBUS_MEDIAINIT(sc->sc_mii.mii_dev); 227 return(0); 228 } 229 230 static int 231 tlphy_service(self, mii, cmd) 232 struct mii_softc *self; 233 struct mii_data *mii; 234 int cmd; 235 { 236 struct tlphy_softc *sc = (struct tlphy_softc *)self; 237 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 238 int reg; 239 240 if (sc->sc_need_acomp) 241 tlphy_acomp(sc); 242 243 switch (cmd) { 244 case MII_POLLSTAT: 245 /* 246 * If we're not polling our PHY instance, just return. 247 */ 248 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) 249 return (0); 250 break; 251 252 case MII_MEDIACHG: 253 /* 254 * If the media indicates a different PHY instance, 255 * isolate ourselves. 256 */ 257 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) { 258 reg = PHY_READ(&sc->sc_mii, MII_BMCR); 259 PHY_WRITE(&sc->sc_mii, MII_BMCR, reg | BMCR_ISO); 260 return (0); 261 } 262 263 /* 264 * If the interface is not up, don't do anything. 265 */ 266 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 267 break; 268 269 switch (IFM_SUBTYPE(ife->ifm_media)) { 270 case IFM_AUTO: 271 /* 272 * The ThunderLAN PHY doesn't self-configure after 273 * an autonegotiation cycle, so there's no such 274 * thing as "already in auto mode". 275 */ 276 (void) tlphy_auto(sc); 277 break; 278 case IFM_10_2: 279 case IFM_10_5: 280 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0); 281 PHY_WRITE(&sc->sc_mii, MII_TLPHY_CTRL, CTRL_AUISEL); 282 DELAY(100000); 283 break; 284 default: 285 PHY_WRITE(&sc->sc_mii, MII_TLPHY_CTRL, 0); 286 DELAY(100000); 287 PHY_WRITE(&sc->sc_mii, MII_ANAR, 288 mii_anar(ife->ifm_media)); 289 PHY_WRITE(&sc->sc_mii, MII_BMCR, ife->ifm_data); 290 } 291 break; 292 293 case MII_TICK: 294 /* 295 * If we're not currently selected, just return. 296 */ 297 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) 298 return (0); 299 300 /* 301 * Is the interface even up? 302 */ 303 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 304 return (0); 305 306 /* 307 * Only used for autonegotiation. 308 */ 309 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 310 break; 311 312 /* 313 * Check to see if we have link. If we do, we don't 314 * need to restart the autonegotiation process. Read 315 * the BMSR twice in case it's latched. 316 * 317 * XXX WHAT ABOUT CHECKING LINK ON THE BNC/AUI?! 318 */ 319 reg = PHY_READ(&sc->sc_mii, MII_BMSR) | 320 PHY_READ(&sc->sc_mii, MII_BMSR); 321 if (reg & BMSR_LINK) 322 break; 323 324 /* 325 * Only retry autonegotiation every 5 seconds. 326 */ 327 if (++sc->sc_mii.mii_ticks != 5) 328 return (0); 329 330 sc->sc_mii.mii_ticks = 0; 331 mii_phy_reset(&sc->sc_mii); 332 tlphy_auto(sc); 333 return (0); 334 } 335 336 /* Update the media status. */ 337 tlphy_status(sc); 338 339 /* Callback if something changed. */ 340 mii_phy_update(&sc->sc_mii, cmd); 341 return (0); 342 } 343 344 static void 345 tlphy_status(sc) 346 struct tlphy_softc *sc; 347 { 348 struct mii_data *mii = sc->sc_mii.mii_pdata; 349 int bmsr, bmcr, tlctrl; 350 351 mii->mii_media_status = IFM_AVALID; 352 mii->mii_media_active = IFM_ETHER; 353 354 bmcr = PHY_READ(&sc->sc_mii, MII_BMCR); 355 if (bmcr & BMCR_ISO) { 356 mii->mii_media_active |= IFM_NONE; 357 mii->mii_media_status = 0; 358 return; 359 } 360 361 tlctrl = PHY_READ(&sc->sc_mii, MII_TLPHY_CTRL); 362 if (tlctrl & CTRL_AUISEL) { 363 mii->mii_media_status = 0; 364 mii->mii_media_active = mii->mii_media.ifm_cur->ifm_media; 365 return; 366 } 367 368 bmsr = PHY_READ(&sc->sc_mii, MII_BMSR) | 369 PHY_READ(&sc->sc_mii, MII_BMSR); 370 if (bmsr & BMSR_LINK) 371 mii->mii_media_status |= IFM_ACTIVE; 372 373 if (bmcr & BMCR_LOOP) 374 mii->mii_media_active |= IFM_LOOP; 375 376 /* 377 * Grr, braindead ThunderLAN PHY doesn't have any way to 378 * tell which media is actually active. (Note it also 379 * doesn't self-configure after autonegotiation.) We 380 * just have to report what's in the BMCR. 381 */ 382 if (bmcr & BMCR_FDX) 383 mii->mii_media_active |= IFM_FDX; 384 mii->mii_media_active |= IFM_10_T; 385 } 386 387 static int 388 tlphy_auto(sc) 389 struct tlphy_softc *sc; 390 { 391 int error; 392 393 switch ((error = mii_phy_auto(&sc->sc_mii))) { 394 case EIO: 395 /* 396 * Just assume we're not in full-duplex mode. 397 * XXX Check link and try AUI/BNC? 398 */ 399 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0); 400 break; 401 402 case EJUSTRETURN: 403 /* Flag that we need to program when it completes. */ 404 sc->sc_need_acomp = 1; 405 break; 406 407 default: 408 tlphy_acomp(sc); 409 } 410 411 return (error); 412 } 413 414 static void 415 tlphy_acomp(sc) 416 struct tlphy_softc *sc; 417 { 418 int aner, anlpar; 419 420 sc->sc_need_acomp = 0; 421 422 /* 423 * Grr, braindead ThunderLAN PHY doesn't self-configure 424 * after autonegotiation. We have to do it ourselves 425 * based on the link partner status. 426 */ 427 428 aner = PHY_READ(&sc->sc_mii, MII_ANER); 429 if (aner & ANER_LPAN) { 430 anlpar = PHY_READ(&sc->sc_mii, MII_ANLPAR) & 431 PHY_READ(&sc->sc_mii, MII_ANAR); 432 if (anlpar & ANAR_10_FD) { 433 PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_FDX); 434 return; 435 } 436 } 437 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0); 438 }
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