mii_physubr.c revision 95722
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/* 41 * Subroutines common to all PHYs. 42 */ 43 44#include <sys/param.h> 45#include <sys/systm.h> 46#include <sys/kernel.h> 47#include <sys/socket.h> 48#include <sys/errno.h> 49#include <sys/module.h> 50#include <sys/bus.h> 51 52 53#include <net/if.h> 54#include <net/if_media.h> 55 56#include <dev/mii/mii.h> 57#include <dev/mii/miivar.h> 58 59#include "miibus_if.h" 60 61#if !defined(lint) 62static const char rcsid[] = 63 "$FreeBSD: head/sys/dev/mii/mii_physubr.c 95722 2002-04-29 13:07:38Z phk $"; 64#endif 65 66/* 67 * Media to register setting conversion table. Order matters. 68 */ 69const struct mii_media mii_media_table[MII_NMEDIA] = { 70 /* None */ 71 { BMCR_ISO, ANAR_CSMA, 72 0, }, 73 74 /* 10baseT */ 75 { BMCR_S10, ANAR_CSMA|ANAR_10, 76 0, }, 77 78 /* 10baseT-FDX */ 79 { BMCR_S10|BMCR_FDX, ANAR_CSMA|ANAR_10_FD, 80 0, }, 81 82 /* 100baseT4 */ 83 { BMCR_S100, ANAR_CSMA|ANAR_T4, 84 0, }, 85 86 /* 100baseTX */ 87 { BMCR_S100, ANAR_CSMA|ANAR_TX, 88 0, }, 89 90 /* 100baseTX-FDX */ 91 { BMCR_S100|BMCR_FDX, ANAR_CSMA|ANAR_TX_FD, 92 0, }, 93 94 /* 1000baseX */ 95 { BMCR_S1000, ANAR_CSMA, 96 0, }, 97 98 /* 1000baseX-FDX */ 99 { BMCR_S1000|BMCR_FDX, ANAR_CSMA, 100 0, }, 101 102 /* 1000baseT */ 103 { BMCR_S1000, ANAR_CSMA, 104 GTCR_ADV_1000THDX }, 105 106 /* 1000baseT-FDX */ 107 { BMCR_S1000, ANAR_CSMA, 108 GTCR_ADV_1000TFDX }, 109}; 110 111void mii_phy_auto_timeout(void *); 112 113void 114mii_phy_setmedia(struct mii_softc *sc) 115{ 116 struct mii_data *mii = sc->mii_pdata; 117 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 118 int bmcr, anar, gtcr; 119 120 if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO) { 121 if ((PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) == 0) 122 (void) mii_phy_auto(sc, 1); 123 return; 124 } 125 126 /* 127 * Table index is stored in the media entry. 128 */ 129 130 KASSERT(ife->ifm_data >=0 && ife->ifm_data < MII_NMEDIA, 131 ("invalid ife->ifm_data (0x%x) in mii_phy_setmedia", 132 ife->ifm_data)); 133 134 anar = mii_media_table[ife->ifm_data].mm_anar; 135 bmcr = mii_media_table[ife->ifm_data].mm_bmcr; 136 gtcr = mii_media_table[ife->ifm_data].mm_gtcr; 137 138 if (mii->mii_media.ifm_media & IFM_ETH_MASTER) { 139 switch (IFM_SUBTYPE(ife->ifm_media)) { 140 case IFM_1000_T: 141 gtcr |= GTCR_MAN_MS|GTCR_ADV_MS; 142 break; 143 144 default: 145 panic("mii_phy_setmedia: MASTER on wrong media"); 146 } 147 } 148 149 if (ife->ifm_media & IFM_LOOP) 150 bmcr |= BMCR_LOOP; 151 152 PHY_WRITE(sc, MII_ANAR, anar); 153 PHY_WRITE(sc, MII_BMCR, bmcr); 154 if (sc->mii_flags & MIIF_HAVE_GTCR) 155 PHY_WRITE(sc, MII_100T2CR, gtcr); 156} 157 158int 159mii_phy_auto(struct mii_softc *sc, int waitfor) 160{ 161 int bmsr, i; 162 163 if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) { 164 /* 165 * Check for 1000BASE-X. Autonegotiation is a bit 166 * different on such devices. 167 */ 168 if (sc->mii_flags & MIIF_IS_1000X) { 169 uint16_t anar = 0; 170 171 if (sc->mii_extcapabilities & EXTSR_1000XFDX) 172 anar |= ANAR_X_FD; 173 if (sc->mii_extcapabilities & EXTSR_1000XHDX) 174 anar |= ANAR_X_HD; 175 176 if (sc->mii_flags & MIIF_DOPAUSE) { 177 /* XXX Asymmetric vs. symmetric? */ 178 anar |= ANLPAR_X_PAUSE_TOWARDS; 179 } 180 181 PHY_WRITE(sc, MII_ANAR, anar); 182 } else { 183 uint16_t anar; 184 185 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | 186 ANAR_CSMA; 187 if (sc->mii_flags & MIIF_DOPAUSE) 188 anar |= ANAR_FC; 189 PHY_WRITE(sc, MII_ANAR, anar); 190 if (sc->mii_flags & MIIF_HAVE_GTCR) { 191 uint16_t gtcr = 0; 192 193 if (sc->mii_extcapabilities & EXTSR_1000TFDX) 194 gtcr |= GTCR_ADV_1000TFDX; 195 if (sc->mii_extcapabilities & EXTSR_1000THDX) 196 gtcr |= GTCR_ADV_1000THDX; 197 198 PHY_WRITE(sc, MII_100T2CR, gtcr); 199 } 200 } 201 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 202 } 203 204 if (waitfor) { 205 /* Wait 500ms for it to complete. */ 206 for (i = 0; i < 500; i++) { 207 if ((bmsr = PHY_READ(sc, MII_BMSR)) & BMSR_ACOMP) 208 return (0); 209 DELAY(1000); 210 } 211 212 /* 213 * Don't need to worry about clearing MIIF_DOINGAUTO. 214 * If that's set, a timeout is pending, and it will 215 * clear the flag. 216 */ 217 return (EIO); 218 } 219 220 /* 221 * Just let it finish asynchronously. This is for the benefit of 222 * the tick handler driving autonegotiation. Don't want 500ms 223 * delays all the time while the system is running! 224 */ 225 if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) { 226 sc->mii_flags |= MIIF_DOINGAUTO; 227 sc->mii_auto_ch = timeout(mii_phy_auto_timeout, sc, hz >> 1); 228 } 229 return (EJUSTRETURN); 230} 231 232void 233mii_phy_auto_timeout(void *arg) 234{ 235 struct mii_softc *sc = arg; 236 int s, bmsr; 237 238#if 0 239 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0) 240 return; 241#endif 242 243 s = splnet(); 244 sc->mii_flags &= ~MIIF_DOINGAUTO; 245 bmsr = PHY_READ(sc, MII_BMSR); 246 247 /* Update the media status. */ 248 (void) (*sc->mii_service)(sc, sc->mii_pdata, MII_POLLSTAT); 249 splx(s); 250} 251 252int 253mii_phy_tick(struct mii_softc *sc) 254{ 255 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 256 struct ifnet *ifp = sc->mii_pdata->mii_ifp; 257 int reg; 258 259 /* Just bail now if the interface is down. */ 260 if ((ifp->if_flags & IFF_UP) == 0) 261 return (EJUSTRETURN); 262 263 /* 264 * If we're not doing autonegotiation, we don't need to do 265 * any extra work here. However, we need to check the link 266 * status so we can generate an announcement if the status 267 * changes. 268 */ 269 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 270 return (0); 271 272 /* Read the status register twice; BMSR_LINK is latch-low. */ 273 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 274 if (reg & BMSR_LINK) { 275 /* 276 * See above. 277 */ 278 return (0); 279 } 280 281 /* 282 * Only retry autonegotiation every N seconds. 283 */ 284 if (sc->mii_anegticks == 0) 285 sc->mii_anegticks = 5; 286 if (++sc->mii_ticks != sc->mii_anegticks) 287 return (EJUSTRETURN); 288 289 sc->mii_ticks = 0; 290 mii_phy_reset(sc); 291 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 292 return (EJUSTRETURN); 293 294 /* 295 * Might need to generate a status message if autonegotiation 296 * failed. 297 */ 298 return (0); 299} 300 301void 302mii_phy_reset(struct mii_softc *sc) 303{ 304 int reg, i; 305 306 if (sc->mii_flags & MIIF_NOISOLATE) 307 reg = BMCR_RESET; 308 else 309 reg = BMCR_RESET | BMCR_ISO; 310 PHY_WRITE(sc, MII_BMCR, reg); 311 312 /* Wait 100ms for it to complete. */ 313 for (i = 0; i < 100; i++) { 314 reg = PHY_READ(sc, MII_BMCR); 315 if ((reg & BMCR_RESET) == 0) 316 break; 317 DELAY(1000); 318 } 319 320 if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) 321 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 322} 323 324void 325mii_phy_down(struct mii_softc *sc) 326{ 327 328 if (sc->mii_flags & MIIF_DOINGAUTO) { 329 sc->mii_flags &= ~MIIF_DOINGAUTO; 330 untimeout(mii_phy_auto_timeout, sc, sc->mii_auto_ch); 331 } 332} 333 334void 335mii_phy_update(struct mii_softc *sc, int cmd) 336{ 337 struct mii_data *mii = sc->mii_pdata; 338 339 if (sc->mii_media_active != mii->mii_media_active || 340 cmd == MII_MEDIACHG) { 341 MIIBUS_STATCHG(sc->mii_dev); 342 sc->mii_media_active = mii->mii_media_active; 343 } 344 if (sc->mii_media_status != mii->mii_media_status) { 345 MIIBUS_LINKCHG(sc->mii_dev); 346 sc->mii_media_status = mii->mii_media_status; 347 } 348} 349 350/* 351 * Given an ifmedia word, return the corresponding ANAR value. 352 */ 353int 354mii_anar(media) 355 int media; 356{ 357 int rv; 358 359 switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) { 360 case IFM_ETHER|IFM_10_T: 361 rv = ANAR_10|ANAR_CSMA; 362 break; 363 case IFM_ETHER|IFM_10_T|IFM_FDX: 364 rv = ANAR_10_FD|ANAR_CSMA; 365 break; 366 case IFM_ETHER|IFM_100_TX: 367 rv = ANAR_TX|ANAR_CSMA; 368 break; 369 case IFM_ETHER|IFM_100_TX|IFM_FDX: 370 rv = ANAR_TX_FD|ANAR_CSMA; 371 break; 372 case IFM_ETHER|IFM_100_T4: 373 rv = ANAR_T4|ANAR_CSMA; 374 break; 375 default: 376 rv = 0; 377 break; 378 } 379 380 return (rv); 381} 382 383/* 384 * Given a BMCR value, return the corresponding ifmedia word. 385 */ 386int 387mii_media_from_bmcr(bmcr) 388 int bmcr; 389{ 390 int rv = IFM_ETHER; 391 392 if (bmcr & BMCR_S100) 393 rv |= IFM_100_TX; 394 else 395 rv |= IFM_10_T; 396 if (bmcr & BMCR_FDX) 397 rv |= IFM_FDX; 398 399 return (rv); 400} 401 402/* 403 * Initialize generic PHY media based on BMSR, called when a PHY is 404 * attached. We expect to be set up to print a comma-separated list 405 * of media names. Does not print a newline. 406 */ 407void 408mii_add_media(struct mii_softc *sc) 409{ 410 const char *sep = ""; 411 struct mii_data *mii; 412 413 mii = device_get_softc(sc->mii_dev); 414 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) { 415 printf("no media present"); 416 return; 417 } 418 419#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 420#define PRINT(s) printf("%s%s", sep, s); sep = ", " 421 422 if (sc->mii_capabilities & BMSR_10THDX) { 423 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst), 0); 424 PRINT("10baseT"); 425 } 426 if (sc->mii_capabilities & BMSR_10TFDX) { 427 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst), 428 BMCR_FDX); 429 PRINT("10baseT-FDX"); 430 } 431 if (sc->mii_capabilities & BMSR_100TXHDX) { 432 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst), 433 BMCR_S100); 434 PRINT("100baseTX"); 435 } 436 if (sc->mii_capabilities & BMSR_100TXFDX) { 437 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst), 438 BMCR_S100|BMCR_FDX); 439 PRINT("100baseTX-FDX"); 440 } 441 if (sc->mii_capabilities & BMSR_100T4) { 442 /* 443 * XXX How do you enable 100baseT4? I assume we set 444 * XXX BMCR_S100 and then assume the PHYs will take 445 * XXX watever action is necessary to switch themselves 446 * XXX into T4 mode. 447 */ 448 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, sc->mii_inst), 449 BMCR_S100); 450 PRINT("100baseT4"); 451 } 452 if (sc->mii_capabilities & BMSR_ANEG) { 453 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 454 BMCR_AUTOEN); 455 PRINT("auto"); 456 } 457 458 459 460#undef ADD 461#undef PRINT 462} 463 464/* 465 * Initialize generic PHY media based on BMSR, called when a PHY is 466 * attached. We expect to be set up to print a comma-separated list 467 * of media names. Does not print a newline. 468 */ 469void 470mii_phy_add_media(struct mii_softc *sc) 471{ 472 struct mii_data *mii = sc->mii_pdata; 473 const char *sep = ""; 474 475#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 476#define PRINT(s) printf("%s%s", sep, s); sep = ", " 477 478 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) 479 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 480 MII_MEDIA_NONE); 481 482 /* 483 * There are different interpretations for the bits in 484 * HomePNA PHYs. And there is really only one media type 485 * that is supported. 486 */ 487 if (sc->mii_flags & MIIF_IS_HPNA) { 488 if (sc->mii_capabilities & BMSR_10THDX) { 489 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_HPNA_1, 0, 490 sc->mii_inst), 491 MII_MEDIA_10_T); 492 PRINT("HomePNA1"); 493 } 494 return; 495 } 496 497 if (sc->mii_capabilities & BMSR_10THDX) { 498 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst), 499 MII_MEDIA_10_T); 500 PRINT("10baseT"); 501 } 502 if (sc->mii_capabilities & BMSR_10TFDX) { 503 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst), 504 MII_MEDIA_10_T_FDX); 505 PRINT("10baseT-FDX"); 506 } 507 if (sc->mii_capabilities & BMSR_100TXHDX) { 508 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst), 509 MII_MEDIA_100_TX); 510 PRINT("100baseTX"); 511 } 512 if (sc->mii_capabilities & BMSR_100TXFDX) { 513 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst), 514 MII_MEDIA_100_TX_FDX); 515 PRINT("100baseTX-FDX"); 516 } 517 if (sc->mii_capabilities & BMSR_100T4) { 518 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, sc->mii_inst), 519 MII_MEDIA_100_T4); 520 PRINT("100baseT4"); 521 } 522 523 if (sc->mii_extcapabilities & EXTSR_MEDIAMASK) { 524 /* 525 * XXX Right now only handle 1000SX and 1000TX. Need 526 * XXX to handle 1000LX and 1000CX some how. 527 * 528 * Note since it can take 5 seconds to auto-negotiate 529 * a gigabit link, we make anegticks 10 seconds for 530 * all the gigabit media types. 531 */ 532 if (sc->mii_extcapabilities & EXTSR_1000XHDX) { 533 sc->mii_anegticks = 10; 534 sc->mii_flags |= MIIF_IS_1000X; 535 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, 536 sc->mii_inst), MII_MEDIA_1000_X); 537 PRINT("1000baseSX"); 538 } 539 if (sc->mii_extcapabilities & EXTSR_1000XFDX) { 540 sc->mii_anegticks = 10; 541 sc->mii_flags |= MIIF_IS_1000X; 542 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, 543 sc->mii_inst), MII_MEDIA_1000_X_FDX); 544 PRINT("1000baseSX-FDX"); 545 } 546 547 /* 548 * 1000baseT media needs to be able to manipulate 549 * master/slave mode. We set IFM_ETH_MASTER in 550 * the "don't care mask" and filter it out when 551 * the media is set. 552 * 553 * All 1000baseT PHYs have a 1000baseT control register. 554 */ 555 if (sc->mii_extcapabilities & EXTSR_1000THDX) { 556 sc->mii_anegticks = 10; 557 sc->mii_flags |= MIIF_HAVE_GTCR; 558 mii->mii_media.ifm_mask |= IFM_ETH_MASTER; 559 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 0, 560 sc->mii_inst), MII_MEDIA_1000_T); 561 PRINT("1000baseT"); 562 } 563 if (sc->mii_extcapabilities & EXTSR_1000TFDX) { 564 sc->mii_anegticks = 10; 565 sc->mii_flags |= MIIF_HAVE_GTCR; 566 mii->mii_media.ifm_mask |= IFM_ETH_MASTER; 567 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, IFM_FDX, 568 sc->mii_inst), MII_MEDIA_1000_T_FDX); 569 PRINT("1000baseT-FDX"); 570 } 571 } 572 573 if (sc->mii_capabilities & BMSR_ANEG) { 574 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 575 MII_NMEDIA); /* intentionally invalid index */ 576 PRINT("auto"); 577 } 578#undef ADD 579#undef PRINT 580} 581 582int 583mii_phy_detach(device_t dev) 584{ 585 struct mii_softc *sc; 586 struct mii_data *mii; 587 588 sc = device_get_softc(dev); 589 mii = device_get_softc(device_get_parent(dev)); 590 mii_phy_down(sc); 591 sc->mii_dev = NULL; 592 LIST_REMOVE(sc, mii_list); 593 594 return(0); 595} 596