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 #include <sys/cdefs.h> 70 __FBSDID("$FreeBSD$"); 71 72 /* 73 * Driver for Texas Instruments's ThunderLAN PHYs 74 */ 75 76 #include <sys/param.h> 77 #include <sys/systm.h> 78 #include <sys/kernel.h> 79 #include <sys/socket.h> 80 #include <sys/errno.h> 81 #include <sys/module.h> 82 #include <sys/bus.h> 83 #include <sys/malloc.h> 84 85 #include <machine/bus.h> 86 87 #include <net/if.h> 88 #include <net/if_media.h> 89 90 #include <dev/mii/mii.h> 91 #include <dev/mii/miivar.h> 92 #include "miidevs.h" 93 94 #include <dev/mii/tlphyreg.h> 95 96 #include "miibus_if.h" 97 98 struct tlphy_softc { 99 struct mii_softc sc_mii; /* generic PHY */ 100 int sc_need_acomp; 101 }; 102 103 static int tlphy_probe(device_t); 104 static int tlphy_attach(device_t); 105 106 static device_method_t tlphy_methods[] = { 107 /* device interface */ 108 DEVMETHOD(device_probe, tlphy_probe), 109 DEVMETHOD(device_attach, tlphy_attach), 110 DEVMETHOD(device_detach, mii_phy_detach), 111 DEVMETHOD(device_shutdown, bus_generic_shutdown), 112 { 0, 0 } 113 }; 114 115 static devclass_t tlphy_devclass; 116 117 static driver_t tlphy_driver = { 118 "tlphy", 119 tlphy_methods, 120 sizeof(struct tlphy_softc) 121 }; 122 123 DRIVER_MODULE(tlphy, miibus, tlphy_driver, tlphy_devclass, 0, 0); 124 125 static int tlphy_service(struct mii_softc *, struct mii_data *, int); 126 static int tlphy_auto(struct tlphy_softc *); 127 static void tlphy_acomp(struct tlphy_softc *); 128 static void tlphy_status(struct tlphy_softc *); 129 130 static int 131 tlphy_probe(dev) 132 device_t dev; 133 { 134 struct mii_attach_args *ma; 135 136 ma = device_get_ivars(dev); 137 138 if (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxTI || 139 MII_MODEL(ma->mii_id2) != MII_MODEL_xxTI_TLAN10T) 140 return (ENXIO); 141 142 device_set_desc(dev, MII_STR_xxTI_TLAN10T); 143 144 return (0); 145 } 146 147 static int 148 tlphy_attach(dev) 149 device_t dev; 150 { 151 struct tlphy_softc *sc; 152 struct mii_attach_args *ma; 153 struct mii_data *mii; 154 const char *sep = ""; 155 int capmask = 0xFFFFFFFF; 156 157 sc = device_get_softc(dev); 158 ma = device_get_ivars(dev); 159 sc->sc_mii.mii_dev = device_get_parent(dev); 160 mii = device_get_softc(sc->sc_mii.mii_dev); 161 LIST_INSERT_HEAD(&mii->mii_phys, &sc->sc_mii, mii_list); 162 163 sc->sc_mii.mii_inst = mii->mii_instance; 164 sc->sc_mii.mii_phy = ma->mii_phyno; 165 sc->sc_mii.mii_service = tlphy_service; 166 sc->sc_mii.mii_pdata = mii; 167 168 if (mii->mii_instance) { 169 struct mii_softc *other; 170 device_t *devlist; 171 int devs, i; 172 173 device_get_children(sc->sc_mii.mii_dev, &devlist, &devs); 174 for (i = 0; i < devs; i++) { 175 if (strcmp(device_get_name(devlist[i]), "tlphy")) { 176 other = device_get_softc(devlist[i]); 177 capmask &= ~other->mii_capabilities; 178 break; 179 } 180 } 181 free(devlist, M_TEMP); 182 } 183 184 mii->mii_instance++; 185 186 sc->sc_mii.mii_flags &= ~MIIF_NOISOLATE; 187 mii_phy_reset(&sc->sc_mii); 188 sc->sc_mii.mii_flags |= MIIF_NOISOLATE; 189 190 /* 191 * Note that if we're on a device that also supports 100baseTX, 192 * we are not going to want to use the built-in 10baseT port, 193 * since there will be another PHY on the MII wired up to the 194 * UTP connector. The parent indicates this to us by specifying 195 * the TLPHY_MEDIA_NO_10_T bit. 196 */ 197 sc->sc_mii.mii_capabilities = 198 PHY_READ(&sc->sc_mii, MII_BMSR) & capmask /*ma->mii_capmask*/; 199 200 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 201 202 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->sc_mii.mii_inst), 203 BMCR_ISO); 204 205 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_LOOP, 206 sc->sc_mii.mii_inst), BMCR_LOOP); 207 208 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 209 210 device_printf(dev, " "); 211 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_2, 0, sc->sc_mii.mii_inst), 0); 212 PRINT("10base2/BNC"); 213 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, sc->sc_mii.mii_inst), 0); 214 PRINT("10base5/AUI"); 215 216 if (sc->sc_mii.mii_capabilities & BMSR_MEDIAMASK) { 217 printf("%s", sep); 218 mii_add_media(&sc->sc_mii); 219 } 220 221 printf("\n"); 222 #undef ADD 223 #undef PRINT 224 MIIBUS_MEDIAINIT(sc->sc_mii.mii_dev); 225 return(0); 226 } 227 228 static int 229 tlphy_service(self, mii, cmd) 230 struct mii_softc *self; 231 struct mii_data *mii; 232 int cmd; 233 { 234 struct tlphy_softc *sc = (struct tlphy_softc *)self; 235 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 236 int reg; 237 238 if (sc->sc_need_acomp) 239 tlphy_acomp(sc); 240 241 switch (cmd) { 242 case MII_POLLSTAT: 243 /* 244 * If we're not polling our PHY instance, just return. 245 */ 246 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) 247 return (0); 248 break; 249 250 case MII_MEDIACHG: 251 /* 252 * If the media indicates a different PHY instance, 253 * isolate ourselves. 254 */ 255 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) { 256 reg = PHY_READ(&sc->sc_mii, MII_BMCR); 257 PHY_WRITE(&sc->sc_mii, MII_BMCR, reg | BMCR_ISO); 258 return (0); 259 } 260 261 /* 262 * If the interface is not up, don't do anything. 263 */ 264 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 265 break; 266 267 switch (IFM_SUBTYPE(ife->ifm_media)) { 268 case IFM_AUTO: 269 /* 270 * The ThunderLAN PHY doesn't self-configure after 271 * an autonegotiation cycle, so there's no such 272 * thing as "already in auto mode". 273 */ 274 (void) tlphy_auto(sc); 275 break; 276 case IFM_10_2: 277 case IFM_10_5: 278 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0); 279 PHY_WRITE(&sc->sc_mii, MII_TLPHY_CTRL, CTRL_AUISEL); 280 DELAY(100000); 281 break; 282 default: 283 PHY_WRITE(&sc->sc_mii, MII_TLPHY_CTRL, 0); 284 DELAY(100000); 285 PHY_WRITE(&sc->sc_mii, MII_ANAR, 286 mii_anar(ife->ifm_media)); 287 PHY_WRITE(&sc->sc_mii, MII_BMCR, ife->ifm_data); 288 } 289 break; 290 291 case MII_TICK: 292 /* 293 * If we're not currently selected, just return. 294 */ 295 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) 296 return (0); 297 298 /* 299 * Is the interface even up? 300 */ 301 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 302 return (0); 303 304 /* 305 * Only used for autonegotiation. 306 */ 307 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 308 break; 309 310 /* 311 * Check to see if we have link. If we do, we don't 312 * need to restart the autonegotiation process. Read 313 * the BMSR twice in case it's latched. 314 * 315 * XXX WHAT ABOUT CHECKING LINK ON THE BNC/AUI?! 316 */ 317 reg = PHY_READ(&sc->sc_mii, MII_BMSR) | 318 PHY_READ(&sc->sc_mii, MII_BMSR); 319 if (reg & BMSR_LINK) 320 break; 321 322 /* 323 * Only retry autonegotiation every 5 seconds. 324 */ 325 if (++sc->sc_mii.mii_ticks <= 5) 326 break; 327 328 sc->sc_mii.mii_ticks = 0; 329 mii_phy_reset(&sc->sc_mii); 330 tlphy_auto(sc); 331 return (0); 332 } 333 334 /* Update the media status. */ 335 tlphy_status(sc); 336 337 /* Callback if something changed. */ 338 mii_phy_update(&sc->sc_mii, cmd); 339 return (0); 340 } 341 342 static void 343 tlphy_status(sc) 344 struct tlphy_softc *sc; 345 { 346 struct mii_data *mii = sc->sc_mii.mii_pdata; 347 int bmsr, bmcr, tlctrl; 348 349 mii->mii_media_status = IFM_AVALID; 350 mii->mii_media_active = IFM_ETHER; 351 352 bmcr = PHY_READ(&sc->sc_mii, MII_BMCR); 353 if (bmcr & BMCR_ISO) { 354 mii->mii_media_active |= IFM_NONE; 355 mii->mii_media_status = 0; 356 return; 357 } 358 359 tlctrl = PHY_READ(&sc->sc_mii, MII_TLPHY_CTRL); 360 if (tlctrl & CTRL_AUISEL) { 361 mii->mii_media_status = 0; 362 mii->mii_media_active = mii->mii_media.ifm_cur->ifm_media; 363 return; 364 } 365 366 bmsr = PHY_READ(&sc->sc_mii, MII_BMSR) | 367 PHY_READ(&sc->sc_mii, MII_BMSR); 368 if (bmsr & BMSR_LINK) 369 mii->mii_media_status |= IFM_ACTIVE; 370 371 if (bmcr & BMCR_LOOP) 372 mii->mii_media_active |= IFM_LOOP; 373 374 /* 375 * Grr, braindead ThunderLAN PHY doesn't have any way to 376 * tell which media is actually active. (Note it also 377 * doesn't self-configure after autonegotiation.) We 378 * just have to report what's in the BMCR. 379 */ 380 if (bmcr & BMCR_FDX) 381 mii->mii_media_active |= IFM_FDX; 382 mii->mii_media_active |= IFM_10_T; 383 } 384 385 static int 386 tlphy_auto(sc) 387 struct tlphy_softc *sc; 388 { 389 int error; 390 391 switch ((error = mii_phy_auto(&sc->sc_mii))) { 392 case EIO: 393 /* 394 * Just assume we're not in full-duplex mode. 395 * XXX Check link and try AUI/BNC? 396 */ 397 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0); 398 break; 399 400 case EJUSTRETURN: 401 /* Flag that we need to program when it completes. */ 402 sc->sc_need_acomp = 1; 403 break; 404 405 default: 406 tlphy_acomp(sc); 407 } 408 409 return (error); 410 } 411 412 static void 413 tlphy_acomp(sc) 414 struct tlphy_softc *sc; 415 { 416 int aner, anlpar; 417 418 sc->sc_need_acomp = 0; 419 420 /* 421 * Grr, braindead ThunderLAN PHY doesn't self-configure 422 * after autonegotiation. We have to do it ourselves 423 * based on the link partner status. 424 */ 425 426 aner = PHY_READ(&sc->sc_mii, MII_ANER); 427 if (aner & ANER_LPAN) { 428 anlpar = PHY_READ(&sc->sc_mii, MII_ANLPAR) & 429 PHY_READ(&sc->sc_mii, MII_ANAR); 430 if (anlpar & ANAR_10_FD) { 431 PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_FDX); 432 return; 433 } 434 } 435 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0); 436 }
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