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 const struct mii_phydesc tlphys[] = { 131 MII_PHY_DESC(xxTI, TLAN10T), 132 MII_PHY_END 133 }; 134 135 static int 136 tlphy_probe(device_t dev) 137 { 138 139 return (mii_phy_dev_probe(dev, tlphys, BUS_PROBE_DEFAULT)); 140 } 141 142 static int 143 tlphy_attach(device_t dev) 144 { 145 device_t *devlist; 146 struct tlphy_softc *sc; 147 struct mii_softc *other; 148 struct mii_attach_args *ma; 149 struct mii_data *mii; 150 const char *sep = ""; 151 int capmask, devs, i; 152 153 sc = device_get_softc(dev); 154 ma = device_get_ivars(dev); 155 sc->sc_mii.mii_dev = device_get_parent(dev); 156 mii = device_get_softc(sc->sc_mii.mii_dev); 157 LIST_INSERT_HEAD(&mii->mii_phys, &sc->sc_mii, mii_list); 158 159 sc->sc_mii.mii_inst = mii->mii_instance; 160 sc->sc_mii.mii_phy = ma->mii_phyno; 161 sc->sc_mii.mii_service = tlphy_service; 162 sc->sc_mii.mii_pdata = mii; 163 164 capmask = 0xFFFFFFFF; 165 if (mii->mii_instance) { 166 device_get_children(sc->sc_mii.mii_dev, &devlist, &devs); 167 for (i = 0; i < devs; i++) { 168 if (strcmp(device_get_name(devlist[i]), "tlphy")) { 169 other = device_get_softc(devlist[i]); 170 capmask &= ~other->mii_capabilities; 171 break; 172 } 173 } 174 free(devlist, M_TEMP); 175 } 176 177 mii->mii_instance++; 178 179 sc->sc_mii.mii_flags &= ~MIIF_NOISOLATE; 180 mii_phy_reset(&sc->sc_mii); 181 sc->sc_mii.mii_flags |= MIIF_NOISOLATE; 182 183 /* 184 * Note that if we're on a device that also supports 100baseTX, 185 * we are not going to want to use the built-in 10baseT port, 186 * since there will be another PHY on the MII wired up to the 187 * UTP connector. The parent indicates this to us by specifying 188 * the TLPHY_MEDIA_NO_10_T bit. 189 */ 190 sc->sc_mii.mii_capabilities = 191 PHY_READ(&sc->sc_mii, MII_BMSR) & capmask /*ma->mii_capmask*/; 192 193 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 194 195 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->sc_mii.mii_inst), 196 BMCR_ISO); 197 198 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_LOOP, 199 sc->sc_mii.mii_inst), BMCR_LOOP); 200 201 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 202 203 device_printf(dev, " "); 204 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_2, 0, sc->sc_mii.mii_inst), 0); 205 PRINT("10base2/BNC"); 206 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, sc->sc_mii.mii_inst), 0); 207 PRINT("10base5/AUI"); 208 209 if (sc->sc_mii.mii_capabilities & BMSR_MEDIAMASK) { 210 printf("%s", sep); 211 mii_add_media(&sc->sc_mii); 212 } 213 214 printf("\n"); 215 #undef ADD 216 #undef PRINT 217 MIIBUS_MEDIAINIT(sc->sc_mii.mii_dev); 218 return (0); 219 } 220 221 static int 222 tlphy_service(struct mii_softc *self, struct mii_data *mii, int cmd) 223 { 224 struct tlphy_softc *sc = (struct tlphy_softc *)self; 225 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 226 int reg; 227 228 if (sc->sc_need_acomp) 229 tlphy_acomp(sc); 230 231 switch (cmd) { 232 case MII_POLLSTAT: 233 /* 234 * If we're not polling our PHY instance, just return. 235 */ 236 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) 237 return (0); 238 break; 239 240 case MII_MEDIACHG: 241 /* 242 * If the media indicates a different PHY instance, 243 * isolate ourselves. 244 */ 245 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) { 246 reg = PHY_READ(&sc->sc_mii, MII_BMCR); 247 PHY_WRITE(&sc->sc_mii, MII_BMCR, reg | BMCR_ISO); 248 return (0); 249 } 250 251 /* 252 * If the interface is not up, don't do anything. 253 */ 254 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 255 break; 256 257 switch (IFM_SUBTYPE(ife->ifm_media)) { 258 case IFM_AUTO: 259 /* 260 * The ThunderLAN PHY doesn't self-configure after 261 * an autonegotiation cycle, so there's no such 262 * thing as "already in auto mode". 263 */ 264 (void) tlphy_auto(sc); 265 break; 266 case IFM_10_2: 267 case IFM_10_5: 268 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0); 269 PHY_WRITE(&sc->sc_mii, MII_TLPHY_CTRL, CTRL_AUISEL); 270 DELAY(100000); 271 break; 272 default: 273 PHY_WRITE(&sc->sc_mii, MII_TLPHY_CTRL, 0); 274 DELAY(100000); 275 PHY_WRITE(&sc->sc_mii, MII_ANAR, 276 mii_anar(ife->ifm_media)); 277 PHY_WRITE(&sc->sc_mii, MII_BMCR, ife->ifm_data); 278 } 279 break; 280 281 case MII_TICK: 282 /* 283 * If we're not currently selected, just return. 284 */ 285 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) 286 return (0); 287 288 /* 289 * Is the interface even up? 290 */ 291 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 292 return (0); 293 294 /* 295 * Only used for autonegotiation. 296 */ 297 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 298 break; 299 300 /* 301 * Check to see if we have link. If we do, we don't 302 * need to restart the autonegotiation process. Read 303 * the BMSR twice in case it's latched. 304 * 305 * XXX WHAT ABOUT CHECKING LINK ON THE BNC/AUI?! 306 */ 307 reg = PHY_READ(&sc->sc_mii, MII_BMSR) | 308 PHY_READ(&sc->sc_mii, MII_BMSR); 309 if (reg & BMSR_LINK) 310 break; 311 312 /* 313 * Only retry autonegotiation every 5 seconds. 314 */ 315 if (++sc->sc_mii.mii_ticks <= MII_ANEGTICKS) 316 break; 317 318 sc->sc_mii.mii_ticks = 0; 319 mii_phy_reset(&sc->sc_mii); 320 tlphy_auto(sc); 321 return (0); 322 } 323 324 /* Update the media status. */ 325 tlphy_status(sc); 326 327 /* Callback if something changed. */ 328 mii_phy_update(&sc->sc_mii, cmd); 329 return (0); 330 } 331 332 static void 333 tlphy_status(struct tlphy_softc *sc) 334 { 335 struct mii_data *mii = sc->sc_mii.mii_pdata; 336 int bmsr, bmcr, tlctrl; 337 338 mii->mii_media_status = IFM_AVALID; 339 mii->mii_media_active = IFM_ETHER; 340 341 bmcr = PHY_READ(&sc->sc_mii, MII_BMCR); 342 if (bmcr & BMCR_ISO) { 343 mii->mii_media_active |= IFM_NONE; 344 mii->mii_media_status = 0; 345 return; 346 } 347 348 tlctrl = PHY_READ(&sc->sc_mii, MII_TLPHY_CTRL); 349 if (tlctrl & CTRL_AUISEL) { 350 mii->mii_media_status = 0; 351 mii->mii_media_active = mii->mii_media.ifm_cur->ifm_media; 352 return; 353 } 354 355 bmsr = PHY_READ(&sc->sc_mii, MII_BMSR) | 356 PHY_READ(&sc->sc_mii, MII_BMSR); 357 if (bmsr & BMSR_LINK) 358 mii->mii_media_status |= IFM_ACTIVE; 359 360 if (bmcr & BMCR_LOOP) 361 mii->mii_media_active |= IFM_LOOP; 362 363 /* 364 * Grr, braindead ThunderLAN PHY doesn't have any way to 365 * tell which media is actually active. (Note it also 366 * doesn't self-configure after autonegotiation.) We 367 * just have to report what's in the BMCR. 368 */ 369 if (bmcr & BMCR_FDX) 370 mii->mii_media_active |= IFM_FDX; 371 mii->mii_media_active |= IFM_10_T; 372 } 373 374 static int 375 tlphy_auto(struct tlphy_softc *sc) 376 { 377 int error; 378 379 switch ((error = mii_phy_auto(&sc->sc_mii))) { 380 case EIO: 381 /* 382 * Just assume we're not in full-duplex mode. 383 * XXX Check link and try AUI/BNC? 384 */ 385 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0); 386 break; 387 388 case EJUSTRETURN: 389 /* Flag that we need to program when it completes. */ 390 sc->sc_need_acomp = 1; 391 break; 392 393 default: 394 tlphy_acomp(sc); 395 } 396 397 return (error); 398 } 399 400 static void 401 tlphy_acomp(struct tlphy_softc *sc) 402 { 403 int aner, anlpar; 404 405 sc->sc_need_acomp = 0; 406 407 /* 408 * Grr, braindead ThunderLAN PHY doesn't self-configure 409 * after autonegotiation. We have to do it ourselves 410 * based on the link partner status. 411 */ 412 413 aner = PHY_READ(&sc->sc_mii, MII_ANER); 414 if (aner & ANER_LPAN) { 415 anlpar = PHY_READ(&sc->sc_mii, MII_ANLPAR) & 416 PHY_READ(&sc->sc_mii, MII_ANAR); 417 if (anlpar & ANAR_10_FD) { 418 PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_FDX); 419 return; 420 } 421 } 422 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0); 423 }
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