mii_physubr.c revision 128870
1/* $NetBSD: mii_physubr.c,v 1.5 1999/08/03 19:41:49 drochner Exp $ */ 2 3/*- 4 * Copyright (c) 1998, 1999, 2000, 2001 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#include <sys/cdefs.h> 41__FBSDID("$FreeBSD: head/sys/dev/mii/mii_physubr.c 128870 2004-05-03 13:01:34Z andre $"); 42 43/* 44 * Subroutines common to all PHYs. 45 */ 46 47#include <sys/cdefs.h> 48__FBSDID("$FreeBSD: head/sys/dev/mii/mii_physubr.c 128870 2004-05-03 13:01:34Z andre $"); 49 50#include <sys/param.h> 51#include <sys/systm.h> 52#include <sys/kernel.h> 53#include <sys/socket.h> 54#include <sys/errno.h> 55#include <sys/module.h> 56#include <sys/bus.h> 57 58 59#include <net/if.h> 60#include <net/if_media.h> 61 62#include <dev/mii/mii.h> 63#include <dev/mii/miivar.h> 64 65#include "miibus_if.h" 66 67/* 68 * Media to register setting conversion table. Order matters. 69 */ 70const struct mii_media mii_media_table[MII_NMEDIA] = { 71 /* None */ 72 { BMCR_ISO, ANAR_CSMA, 73 0, }, 74 75 /* 10baseT */ 76 { BMCR_S10, ANAR_CSMA|ANAR_10, 77 0, }, 78 79 /* 10baseT-FDX */ 80 { BMCR_S10|BMCR_FDX, ANAR_CSMA|ANAR_10_FD, 81 0, }, 82 83 /* 100baseT4 */ 84 { BMCR_S100, ANAR_CSMA|ANAR_T4, 85 0, }, 86 87 /* 100baseTX */ 88 { BMCR_S100, ANAR_CSMA|ANAR_TX, 89 0, }, 90 91 /* 100baseTX-FDX */ 92 { BMCR_S100|BMCR_FDX, ANAR_CSMA|ANAR_TX_FD, 93 0, }, 94 95 /* 1000baseX */ 96 { BMCR_S1000, ANAR_CSMA, 97 0, }, 98 99 /* 1000baseX-FDX */ 100 { BMCR_S1000|BMCR_FDX, ANAR_CSMA, 101 0, }, 102 103 /* 1000baseT */ 104 { BMCR_S1000, ANAR_CSMA, 105 GTCR_ADV_1000THDX }, 106 107 /* 1000baseT-FDX */ 108 { BMCR_S1000, ANAR_CSMA, 109 GTCR_ADV_1000TFDX }, 110}; 111 112void 113mii_phy_setmedia(struct mii_softc *sc) 114{ 115 struct mii_data *mii = sc->mii_pdata; 116 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 117 int bmcr, anar, gtcr; 118 119 if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO) { 120 if ((PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) == 0) 121 (void) mii_phy_auto(sc); 122 return; 123 } 124 125 /* 126 * Table index is stored in the media entry. 127 */ 128 129 KASSERT(ife->ifm_data >=0 && ife->ifm_data < MII_NMEDIA, 130 ("invalid ife->ifm_data (0x%x) in mii_phy_setmedia", 131 ife->ifm_data)); 132 133 anar = mii_media_table[ife->ifm_data].mm_anar; 134 bmcr = mii_media_table[ife->ifm_data].mm_bmcr; 135 gtcr = mii_media_table[ife->ifm_data].mm_gtcr; 136 137 if (mii->mii_media.ifm_media & IFM_ETH_MASTER) { 138 switch (IFM_SUBTYPE(ife->ifm_media)) { 139 case IFM_1000_T: 140 gtcr |= GTCR_MAN_MS|GTCR_ADV_MS; 141 break; 142 143 default: 144 panic("mii_phy_setmedia: MASTER on wrong media"); 145 } 146 } 147 148 if (ife->ifm_media & IFM_LOOP) 149 bmcr |= BMCR_LOOP; 150 151 PHY_WRITE(sc, MII_ANAR, anar); 152 PHY_WRITE(sc, MII_BMCR, bmcr); 153 if (sc->mii_flags & MIIF_HAVE_GTCR) 154 PHY_WRITE(sc, MII_100T2CR, gtcr); 155} 156 157int 158mii_phy_auto(struct mii_softc *sc) 159{ 160 161 /* 162 * Check for 1000BASE-X. Autonegotiation is a bit 163 * different on such devices. 164 */ 165 if (sc->mii_flags & MIIF_IS_1000X) { 166 uint16_t anar = 0; 167 168 if (sc->mii_extcapabilities & EXTSR_1000XFDX) 169 anar |= ANAR_X_FD; 170 if (sc->mii_extcapabilities & EXTSR_1000XHDX) 171 anar |= ANAR_X_HD; 172 173 if (sc->mii_flags & MIIF_DOPAUSE) { 174 /* XXX Asymmetric vs. symmetric? */ 175 anar |= ANLPAR_X_PAUSE_TOWARDS; 176 } 177 178 PHY_WRITE(sc, MII_ANAR, anar); 179 } else { 180 uint16_t anar; 181 182 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | 183 ANAR_CSMA; 184 if (sc->mii_flags & MIIF_DOPAUSE) 185 anar |= ANAR_FC; 186 PHY_WRITE(sc, MII_ANAR, anar); 187 if (sc->mii_flags & MIIF_HAVE_GTCR) { 188 uint16_t gtcr = 0; 189 190 if (sc->mii_extcapabilities & EXTSR_1000TFDX) 191 gtcr |= GTCR_ADV_1000TFDX; 192 if (sc->mii_extcapabilities & EXTSR_1000THDX) 193 gtcr |= GTCR_ADV_1000THDX; 194 195 PHY_WRITE(sc, MII_100T2CR, gtcr); 196 } 197 } 198 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 199 return (EJUSTRETURN); 200} 201 202int 203mii_phy_tick(struct mii_softc *sc) 204{ 205 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 206 struct ifnet *ifp = sc->mii_pdata->mii_ifp; 207 int reg; 208 209 /* Just bail now if the interface is down. */ 210 if ((ifp->if_flags & IFF_UP) == 0) 211 return (EJUSTRETURN); 212 213 /* 214 * If we're not doing autonegotiation, we don't need to do 215 * any extra work here. However, we need to check the link 216 * status so we can generate an announcement if the status 217 * changes. 218 */ 219 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 220 return (0); 221 222 /* Read the status register twice; BMSR_LINK is latch-low. */ 223 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 224 if (reg & BMSR_LINK) { 225 /* 226 * See above. 227 */ 228 return (0); 229 } 230 231 /* 232 * Only retry autonegotiation every N seconds. 233 */ 234 if (sc->mii_anegticks == 0) { 235 sc->mii_anegticks = 17; 236 return (0); 237 } 238 if (++sc->mii_ticks <= sc->mii_anegticks) 239 return (EJUSTRETURN); 240 241 sc->mii_ticks = 0; 242 mii_phy_reset(sc); 243 mii_phy_auto(sc); 244 return (0); 245} 246 247void 248mii_phy_reset(struct mii_softc *sc) 249{ 250 int reg, i; 251 252 if (sc->mii_flags & MIIF_NOISOLATE) 253 reg = BMCR_RESET; 254 else 255 reg = BMCR_RESET | BMCR_ISO; 256 PHY_WRITE(sc, MII_BMCR, reg); 257 258 /* Wait 100ms for it to complete. */ 259 for (i = 0; i < 100; i++) { 260 reg = PHY_READ(sc, MII_BMCR); 261 if ((reg & BMCR_RESET) == 0) 262 break; 263 DELAY(1000); 264 } 265 266 if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) 267 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 268} 269 270void 271mii_phy_down(struct mii_softc *sc) 272{ 273 274} 275 276void 277mii_phy_update(struct mii_softc *sc, int cmd) 278{ 279 struct mii_data *mii = sc->mii_pdata; 280 281 if (sc->mii_media_active != mii->mii_media_active || 282 cmd == MII_MEDIACHG) { 283 MIIBUS_STATCHG(sc->mii_dev); 284 sc->mii_media_active = mii->mii_media_active; 285 } 286 if (sc->mii_media_status != mii->mii_media_status) { 287 MIIBUS_LINKCHG(sc->mii_dev); 288 sc->mii_media_status = mii->mii_media_status; 289 } 290} 291 292/* 293 * Given an ifmedia word, return the corresponding ANAR value. 294 */ 295int 296mii_anar(media) 297 int media; 298{ 299 int rv; 300 301 switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) { 302 case IFM_ETHER|IFM_10_T: 303 rv = ANAR_10|ANAR_CSMA; 304 break; 305 case IFM_ETHER|IFM_10_T|IFM_FDX: 306 rv = ANAR_10_FD|ANAR_CSMA; 307 break; 308 case IFM_ETHER|IFM_100_TX: 309 rv = ANAR_TX|ANAR_CSMA; 310 break; 311 case IFM_ETHER|IFM_100_TX|IFM_FDX: 312 rv = ANAR_TX_FD|ANAR_CSMA; 313 break; 314 case IFM_ETHER|IFM_100_T4: 315 rv = ANAR_T4|ANAR_CSMA; 316 break; 317 default: 318 rv = 0; 319 break; 320 } 321 322 return (rv); 323} 324 325/* 326 * Given a BMCR value, return the corresponding ifmedia word. 327 */ 328int 329mii_media_from_bmcr(bmcr) 330 int bmcr; 331{ 332 int rv = IFM_ETHER; 333 334 if (bmcr & BMCR_S100) 335 rv |= IFM_100_TX; 336 else 337 rv |= IFM_10_T; 338 if (bmcr & BMCR_FDX) 339 rv |= IFM_FDX; 340 341 return (rv); 342} 343 344/* 345 * Initialize generic PHY media based on BMSR, called when a PHY is 346 * attached. We expect to be set up to print a comma-separated list 347 * of media names. Does not print a newline. 348 */ 349void 350mii_add_media(struct mii_softc *sc) 351{ 352 const char *sep = ""; 353 struct mii_data *mii; 354 355 mii = device_get_softc(sc->mii_dev); 356 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) { 357 printf("no media present"); 358 return; 359 } 360 361#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 362#define PRINT(s) printf("%s%s", sep, s); sep = ", " 363 364 if (sc->mii_capabilities & BMSR_10THDX) { 365 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst), 0); 366 PRINT("10baseT"); 367 } 368 if (sc->mii_capabilities & BMSR_10TFDX) { 369 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst), 370 BMCR_FDX); 371 PRINT("10baseT-FDX"); 372 } 373 if (sc->mii_capabilities & BMSR_100TXHDX) { 374 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst), 375 BMCR_S100); 376 PRINT("100baseTX"); 377 } 378 if (sc->mii_capabilities & BMSR_100TXFDX) { 379 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst), 380 BMCR_S100|BMCR_FDX); 381 PRINT("100baseTX-FDX"); 382 } 383 if (sc->mii_capabilities & BMSR_100T4) { 384 /* 385 * XXX How do you enable 100baseT4? I assume we set 386 * XXX BMCR_S100 and then assume the PHYs will take 387 * XXX watever action is necessary to switch themselves 388 * XXX into T4 mode. 389 */ 390 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, sc->mii_inst), 391 BMCR_S100); 392 PRINT("100baseT4"); 393 } 394 if (sc->mii_capabilities & BMSR_ANEG) { 395 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 396 BMCR_AUTOEN); 397 PRINT("auto"); 398 } 399 400 401 402#undef ADD 403#undef PRINT 404} 405 406/* 407 * Initialize generic PHY media based on BMSR, called when a PHY is 408 * attached. We expect to be set up to print a comma-separated list 409 * of media names. Does not print a newline. 410 */ 411void 412mii_phy_add_media(struct mii_softc *sc) 413{ 414 struct mii_data *mii = sc->mii_pdata; 415 const char *sep = ""; 416 417#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 418#define PRINT(s) printf("%s%s", sep, s); sep = ", " 419 420 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) 421 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 422 MII_MEDIA_NONE); 423 424 /* 425 * There are different interpretations for the bits in 426 * HomePNA PHYs. And there is really only one media type 427 * that is supported. 428 */ 429 if (sc->mii_flags & MIIF_IS_HPNA) { 430 if (sc->mii_capabilities & BMSR_10THDX) { 431 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_HPNA_1, 0, 432 sc->mii_inst), 433 MII_MEDIA_10_T); 434 PRINT("HomePNA1"); 435 } 436 return; 437 } 438 439 if (sc->mii_capabilities & BMSR_10THDX) { 440 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst), 441 MII_MEDIA_10_T); 442 PRINT("10baseT"); 443 } 444 if (sc->mii_capabilities & BMSR_10TFDX) { 445 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst), 446 MII_MEDIA_10_T_FDX); 447 PRINT("10baseT-FDX"); 448 } 449 if (sc->mii_capabilities & BMSR_100TXHDX) { 450 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst), 451 MII_MEDIA_100_TX); 452 PRINT("100baseTX"); 453 } 454 if (sc->mii_capabilities & BMSR_100TXFDX) { 455 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst), 456 MII_MEDIA_100_TX_FDX); 457 PRINT("100baseTX-FDX"); 458 } 459 if (sc->mii_capabilities & BMSR_100T4) { 460 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, sc->mii_inst), 461 MII_MEDIA_100_T4); 462 PRINT("100baseT4"); 463 } 464 465 if (sc->mii_extcapabilities & EXTSR_MEDIAMASK) { 466 /* 467 * XXX Right now only handle 1000SX and 1000TX. Need 468 * XXX to handle 1000LX and 1000CX some how. 469 * 470 * Note since it can take 5 seconds to auto-negotiate 471 * a gigabit link, we make anegticks 10 seconds for 472 * all the gigabit media types. 473 */ 474 if (sc->mii_extcapabilities & EXTSR_1000XHDX) { 475 sc->mii_anegticks = 17; 476 sc->mii_flags |= MIIF_IS_1000X; 477 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, 478 sc->mii_inst), MII_MEDIA_1000_X); 479 PRINT("1000baseSX"); 480 } 481 if (sc->mii_extcapabilities & EXTSR_1000XFDX) { 482 sc->mii_anegticks = 17; 483 sc->mii_flags |= MIIF_IS_1000X; 484 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, 485 sc->mii_inst), MII_MEDIA_1000_X_FDX); 486 PRINT("1000baseSX-FDX"); 487 } 488 489 /* 490 * 1000baseT media needs to be able to manipulate 491 * master/slave mode. We set IFM_ETH_MASTER in 492 * the "don't care mask" and filter it out when 493 * the media is set. 494 * 495 * All 1000baseT PHYs have a 1000baseT control register. 496 */ 497 if (sc->mii_extcapabilities & EXTSR_1000THDX) { 498 sc->mii_anegticks = 17; 499 sc->mii_flags |= MIIF_HAVE_GTCR; 500 mii->mii_media.ifm_mask |= IFM_ETH_MASTER; 501 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 0, 502 sc->mii_inst), MII_MEDIA_1000_T); 503 PRINT("1000baseT"); 504 } 505 if (sc->mii_extcapabilities & EXTSR_1000TFDX) { 506 sc->mii_anegticks = 17; 507 sc->mii_flags |= MIIF_HAVE_GTCR; 508 mii->mii_media.ifm_mask |= IFM_ETH_MASTER; 509 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, IFM_FDX, 510 sc->mii_inst), MII_MEDIA_1000_T_FDX); 511 PRINT("1000baseT-FDX"); 512 } 513 } 514 515 if (sc->mii_capabilities & BMSR_ANEG) { 516 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 517 MII_NMEDIA); /* intentionally invalid index */ 518 PRINT("auto"); 519 } 520#undef ADD 521#undef PRINT 522} 523 524int 525mii_phy_detach(device_t dev) 526{ 527 struct mii_softc *sc; 528 529 sc = device_get_softc(dev); 530 mii_phy_down(sc); 531 sc->mii_dev = NULL; 532 LIST_REMOVE(sc, mii_list); 533 534 return(0); 535} 536 537const struct mii_phydesc * 538mii_phy_match(const struct mii_attach_args *ma, const struct mii_phydesc *mpd) 539{ 540 541 for (; mpd->mpd_name != NULL; mpd++) { 542 if (MII_OUI(ma->mii_id1, ma->mii_id2) == mpd->mpd_oui && 543 MII_MODEL(ma->mii_id2) == mpd->mpd_model) 544 return (mpd); 545 } 546 return (NULL); 547} 548