mii_physubr.c revision 115520
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/cdefs.h> 45__FBSDID("$FreeBSD: head/sys/dev/mii/mii_physubr.c 115520 2003-05-31 19:48:33Z phk $"); 46 47#include <sys/param.h> 48#include <sys/systm.h> 49#include <sys/kernel.h> 50#include <sys/socket.h> 51#include <sys/errno.h> 52#include <sys/module.h> 53#include <sys/bus.h> 54 55 56#include <net/if.h> 57#include <net/if_media.h> 58 59#include <dev/mii/mii.h> 60#include <dev/mii/miivar.h> 61 62#include "miibus_if.h" 63 64/* 65 * Media to register setting conversion table. Order matters. 66 */ 67const struct mii_media mii_media_table[MII_NMEDIA] = { 68 /* None */ 69 { BMCR_ISO, ANAR_CSMA, 70 0, }, 71 72 /* 10baseT */ 73 { BMCR_S10, ANAR_CSMA|ANAR_10, 74 0, }, 75 76 /* 10baseT-FDX */ 77 { BMCR_S10|BMCR_FDX, ANAR_CSMA|ANAR_10_FD, 78 0, }, 79 80 /* 100baseT4 */ 81 { BMCR_S100, ANAR_CSMA|ANAR_T4, 82 0, }, 83 84 /* 100baseTX */ 85 { BMCR_S100, ANAR_CSMA|ANAR_TX, 86 0, }, 87 88 /* 100baseTX-FDX */ 89 { BMCR_S100|BMCR_FDX, ANAR_CSMA|ANAR_TX_FD, 90 0, }, 91 92 /* 1000baseX */ 93 { BMCR_S1000, ANAR_CSMA, 94 0, }, 95 96 /* 1000baseX-FDX */ 97 { BMCR_S1000|BMCR_FDX, ANAR_CSMA, 98 0, }, 99 100 /* 1000baseT */ 101 { BMCR_S1000, ANAR_CSMA, 102 GTCR_ADV_1000THDX }, 103 104 /* 1000baseT-FDX */ 105 { BMCR_S1000, ANAR_CSMA, 106 GTCR_ADV_1000TFDX }, 107}; 108 109void 110mii_phy_setmedia(struct mii_softc *sc) 111{ 112 struct mii_data *mii = sc->mii_pdata; 113 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 114 int bmcr, anar, gtcr; 115 116 if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO) { 117 if ((PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) == 0) 118 (void) mii_phy_auto(sc); 119 return; 120 } 121 122 /* 123 * Table index is stored in the media entry. 124 */ 125 126 KASSERT(ife->ifm_data >=0 && ife->ifm_data < MII_NMEDIA, 127 ("invalid ife->ifm_data (0x%x) in mii_phy_setmedia", 128 ife->ifm_data)); 129 130 anar = mii_media_table[ife->ifm_data].mm_anar; 131 bmcr = mii_media_table[ife->ifm_data].mm_bmcr; 132 gtcr = mii_media_table[ife->ifm_data].mm_gtcr; 133 134 if (mii->mii_media.ifm_media & IFM_ETH_MASTER) { 135 switch (IFM_SUBTYPE(ife->ifm_media)) { 136 case IFM_1000_T: 137 gtcr |= GTCR_MAN_MS|GTCR_ADV_MS; 138 break; 139 140 default: 141 panic("mii_phy_setmedia: MASTER on wrong media"); 142 } 143 } 144 145 if (ife->ifm_media & IFM_LOOP) 146 bmcr |= BMCR_LOOP; 147 148 PHY_WRITE(sc, MII_ANAR, anar); 149 PHY_WRITE(sc, MII_BMCR, bmcr); 150 if (sc->mii_flags & MIIF_HAVE_GTCR) 151 PHY_WRITE(sc, MII_100T2CR, gtcr); 152} 153 154int 155mii_phy_auto(struct mii_softc *sc) 156{ 157 158 /* 159 * Check for 1000BASE-X. Autonegotiation is a bit 160 * different on such devices. 161 */ 162 if (sc->mii_flags & MIIF_IS_1000X) { 163 uint16_t anar = 0; 164 165 if (sc->mii_extcapabilities & EXTSR_1000XFDX) 166 anar |= ANAR_X_FD; 167 if (sc->mii_extcapabilities & EXTSR_1000XHDX) 168 anar |= ANAR_X_HD; 169 170 if (sc->mii_flags & MIIF_DOPAUSE) { 171 /* XXX Asymmetric vs. symmetric? */ 172 anar |= ANLPAR_X_PAUSE_TOWARDS; 173 } 174 175 PHY_WRITE(sc, MII_ANAR, anar); 176 } else { 177 uint16_t anar; 178 179 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | 180 ANAR_CSMA; 181 if (sc->mii_flags & MIIF_DOPAUSE) 182 anar |= ANAR_FC; 183 PHY_WRITE(sc, MII_ANAR, anar); 184 if (sc->mii_flags & MIIF_HAVE_GTCR) { 185 uint16_t gtcr = 0; 186 187 if (sc->mii_extcapabilities & EXTSR_1000TFDX) 188 gtcr |= GTCR_ADV_1000TFDX; 189 if (sc->mii_extcapabilities & EXTSR_1000THDX) 190 gtcr |= GTCR_ADV_1000THDX; 191 192 PHY_WRITE(sc, MII_100T2CR, gtcr); 193 } 194 } 195 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 196 return (EJUSTRETURN); 197} 198 199int 200mii_phy_tick(struct mii_softc *sc) 201{ 202 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 203 struct ifnet *ifp = sc->mii_pdata->mii_ifp; 204 int reg; 205 206 /* Just bail now if the interface is down. */ 207 if ((ifp->if_flags & IFF_UP) == 0) 208 return (EJUSTRETURN); 209 210 /* 211 * If we're not doing autonegotiation, we don't need to do 212 * any extra work here. However, we need to check the link 213 * status so we can generate an announcement if the status 214 * changes. 215 */ 216 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 217 return (0); 218 219 /* Read the status register twice; BMSR_LINK is latch-low. */ 220 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 221 if (reg & BMSR_LINK) { 222 /* 223 * See above. 224 */ 225 return (0); 226 } 227 228 /* 229 * Only retry autonegotiation every N seconds. 230 */ 231 if (sc->mii_anegticks == 0) 232 sc->mii_anegticks = 17; 233 if (++sc->mii_ticks != sc->mii_anegticks) 234 return (EJUSTRETURN); 235 236 sc->mii_ticks = 0; 237 mii_phy_reset(sc); 238 mii_phy_auto(sc); 239 return (0); 240} 241 242void 243mii_phy_reset(struct mii_softc *sc) 244{ 245 int reg, i; 246 247 if (sc->mii_flags & MIIF_NOISOLATE) 248 reg = BMCR_RESET; 249 else 250 reg = BMCR_RESET | BMCR_ISO; 251 PHY_WRITE(sc, MII_BMCR, reg); 252 253 /* Wait 100ms for it to complete. */ 254 for (i = 0; i < 100; i++) { 255 reg = PHY_READ(sc, MII_BMCR); 256 if ((reg & BMCR_RESET) == 0) 257 break; 258 DELAY(1000); 259 } 260 261 if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) 262 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 263} 264 265void 266mii_phy_down(struct mii_softc *sc) 267{ 268 269} 270 271void 272mii_phy_update(struct mii_softc *sc, int cmd) 273{ 274 struct mii_data *mii = sc->mii_pdata; 275 276 if (sc->mii_media_active != mii->mii_media_active || 277 cmd == MII_MEDIACHG) { 278 MIIBUS_STATCHG(sc->mii_dev); 279 sc->mii_media_active = mii->mii_media_active; 280 } 281 if (sc->mii_media_status != mii->mii_media_status) { 282 MIIBUS_LINKCHG(sc->mii_dev); 283 sc->mii_media_status = mii->mii_media_status; 284 } 285} 286 287/* 288 * Given an ifmedia word, return the corresponding ANAR value. 289 */ 290int 291mii_anar(media) 292 int media; 293{ 294 int rv; 295 296 switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) { 297 case IFM_ETHER|IFM_10_T: 298 rv = ANAR_10|ANAR_CSMA; 299 break; 300 case IFM_ETHER|IFM_10_T|IFM_FDX: 301 rv = ANAR_10_FD|ANAR_CSMA; 302 break; 303 case IFM_ETHER|IFM_100_TX: 304 rv = ANAR_TX|ANAR_CSMA; 305 break; 306 case IFM_ETHER|IFM_100_TX|IFM_FDX: 307 rv = ANAR_TX_FD|ANAR_CSMA; 308 break; 309 case IFM_ETHER|IFM_100_T4: 310 rv = ANAR_T4|ANAR_CSMA; 311 break; 312 default: 313 rv = 0; 314 break; 315 } 316 317 return (rv); 318} 319 320/* 321 * Given a BMCR value, return the corresponding ifmedia word. 322 */ 323int 324mii_media_from_bmcr(bmcr) 325 int bmcr; 326{ 327 int rv = IFM_ETHER; 328 329 if (bmcr & BMCR_S100) 330 rv |= IFM_100_TX; 331 else 332 rv |= IFM_10_T; 333 if (bmcr & BMCR_FDX) 334 rv |= IFM_FDX; 335 336 return (rv); 337} 338 339/* 340 * Initialize generic PHY media based on BMSR, called when a PHY is 341 * attached. We expect to be set up to print a comma-separated list 342 * of media names. Does not print a newline. 343 */ 344void 345mii_add_media(struct mii_softc *sc) 346{ 347 const char *sep = ""; 348 struct mii_data *mii; 349 350 mii = device_get_softc(sc->mii_dev); 351 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) { 352 printf("no media present"); 353 return; 354 } 355 356#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 357#define PRINT(s) printf("%s%s", sep, s); sep = ", " 358 359 if (sc->mii_capabilities & BMSR_10THDX) { 360 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst), 0); 361 PRINT("10baseT"); 362 } 363 if (sc->mii_capabilities & BMSR_10TFDX) { 364 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst), 365 BMCR_FDX); 366 PRINT("10baseT-FDX"); 367 } 368 if (sc->mii_capabilities & BMSR_100TXHDX) { 369 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst), 370 BMCR_S100); 371 PRINT("100baseTX"); 372 } 373 if (sc->mii_capabilities & BMSR_100TXFDX) { 374 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst), 375 BMCR_S100|BMCR_FDX); 376 PRINT("100baseTX-FDX"); 377 } 378 if (sc->mii_capabilities & BMSR_100T4) { 379 /* 380 * XXX How do you enable 100baseT4? I assume we set 381 * XXX BMCR_S100 and then assume the PHYs will take 382 * XXX watever action is necessary to switch themselves 383 * XXX into T4 mode. 384 */ 385 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, sc->mii_inst), 386 BMCR_S100); 387 PRINT("100baseT4"); 388 } 389 if (sc->mii_capabilities & BMSR_ANEG) { 390 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 391 BMCR_AUTOEN); 392 PRINT("auto"); 393 } 394 395 396 397#undef ADD 398#undef PRINT 399} 400 401/* 402 * Initialize generic PHY media based on BMSR, called when a PHY is 403 * attached. We expect to be set up to print a comma-separated list 404 * of media names. Does not print a newline. 405 */ 406void 407mii_phy_add_media(struct mii_softc *sc) 408{ 409 struct mii_data *mii = sc->mii_pdata; 410 const char *sep = ""; 411 412#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 413#define PRINT(s) printf("%s%s", sep, s); sep = ", " 414 415 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) 416 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 417 MII_MEDIA_NONE); 418 419 /* 420 * There are different interpretations for the bits in 421 * HomePNA PHYs. And there is really only one media type 422 * that is supported. 423 */ 424 if (sc->mii_flags & MIIF_IS_HPNA) { 425 if (sc->mii_capabilities & BMSR_10THDX) { 426 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_HPNA_1, 0, 427 sc->mii_inst), 428 MII_MEDIA_10_T); 429 PRINT("HomePNA1"); 430 } 431 return; 432 } 433 434 if (sc->mii_capabilities & BMSR_10THDX) { 435 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst), 436 MII_MEDIA_10_T); 437 PRINT("10baseT"); 438 } 439 if (sc->mii_capabilities & BMSR_10TFDX) { 440 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst), 441 MII_MEDIA_10_T_FDX); 442 PRINT("10baseT-FDX"); 443 } 444 if (sc->mii_capabilities & BMSR_100TXHDX) { 445 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst), 446 MII_MEDIA_100_TX); 447 PRINT("100baseTX"); 448 } 449 if (sc->mii_capabilities & BMSR_100TXFDX) { 450 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst), 451 MII_MEDIA_100_TX_FDX); 452 PRINT("100baseTX-FDX"); 453 } 454 if (sc->mii_capabilities & BMSR_100T4) { 455 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, sc->mii_inst), 456 MII_MEDIA_100_T4); 457 PRINT("100baseT4"); 458 } 459 460 if (sc->mii_extcapabilities & EXTSR_MEDIAMASK) { 461 /* 462 * XXX Right now only handle 1000SX and 1000TX. Need 463 * XXX to handle 1000LX and 1000CX some how. 464 * 465 * Note since it can take 5 seconds to auto-negotiate 466 * a gigabit link, we make anegticks 10 seconds for 467 * all the gigabit media types. 468 */ 469 if (sc->mii_extcapabilities & EXTSR_1000XHDX) { 470 sc->mii_anegticks = 17; 471 sc->mii_flags |= MIIF_IS_1000X; 472 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, 473 sc->mii_inst), MII_MEDIA_1000_X); 474 PRINT("1000baseSX"); 475 } 476 if (sc->mii_extcapabilities & EXTSR_1000XFDX) { 477 sc->mii_anegticks = 17; 478 sc->mii_flags |= MIIF_IS_1000X; 479 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, 480 sc->mii_inst), MII_MEDIA_1000_X_FDX); 481 PRINT("1000baseSX-FDX"); 482 } 483 484 /* 485 * 1000baseT media needs to be able to manipulate 486 * master/slave mode. We set IFM_ETH_MASTER in 487 * the "don't care mask" and filter it out when 488 * the media is set. 489 * 490 * All 1000baseT PHYs have a 1000baseT control register. 491 */ 492 if (sc->mii_extcapabilities & EXTSR_1000THDX) { 493 sc->mii_anegticks = 17; 494 sc->mii_flags |= MIIF_HAVE_GTCR; 495 mii->mii_media.ifm_mask |= IFM_ETH_MASTER; 496 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 0, 497 sc->mii_inst), MII_MEDIA_1000_T); 498 PRINT("1000baseT"); 499 } 500 if (sc->mii_extcapabilities & EXTSR_1000TFDX) { 501 sc->mii_anegticks = 17; 502 sc->mii_flags |= MIIF_HAVE_GTCR; 503 mii->mii_media.ifm_mask |= IFM_ETH_MASTER; 504 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, IFM_FDX, 505 sc->mii_inst), MII_MEDIA_1000_T_FDX); 506 PRINT("1000baseT-FDX"); 507 } 508 } 509 510 if (sc->mii_capabilities & BMSR_ANEG) { 511 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 512 MII_NMEDIA); /* intentionally invalid index */ 513 PRINT("auto"); 514 } 515#undef ADD 516#undef PRINT 517} 518 519int 520mii_phy_detach(device_t dev) 521{ 522 struct mii_softc *sc; 523 524 sc = device_get_softc(dev); 525 mii_phy_down(sc); 526 sc->mii_dev = NULL; 527 LIST_REMOVE(sc, mii_list); 528 529 return(0); 530} 531 532const struct mii_phydesc * 533mii_phy_match(const struct mii_attach_args *ma, const struct mii_phydesc *mpd) 534{ 535 536 for (; mpd->mpd_name != NULL; mpd++) { 537 if (MII_OUI(ma->mii_id1, ma->mii_id2) == mpd->mpd_oui && 538 MII_MODEL(ma->mii_id2) == mpd->mpd_model) 539 return (mpd); 540 } 541 return (NULL); 542} 543