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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 /* 37 * Subroutines common to all PHYs. 38 */ 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/socket.h> 44 #include <sys/errno.h> 45 #include <sys/module.h> 46 #include <sys/bus.h> 47 48 #include <net/if.h> 49 #include <net/if_media.h> 50 51 #include <dev/mii/mii.h> 52 #include <dev/mii/miivar.h> 53 54 #include "miibus_if.h" 55 56 /* 57 * Media to register setting conversion table. Order matters. 58 */ 59 static const struct mii_media mii_media_table[MII_NMEDIA] = { 60 /* None */ 61 { BMCR_ISO, ANAR_CSMA, 62 0, }, 63 64 /* 10baseT */ 65 { BMCR_S10, ANAR_CSMA|ANAR_10, 66 0, }, 67 68 /* 10baseT-FDX */ 69 { BMCR_S10|BMCR_FDX, ANAR_CSMA|ANAR_10_FD, 70 0, }, 71 72 /* 100baseT4 */ 73 { BMCR_S100, ANAR_CSMA|ANAR_T4, 74 0, }, 75 76 /* 100baseTX */ 77 { BMCR_S100, ANAR_CSMA|ANAR_TX, 78 0, }, 79 80 /* 100baseTX-FDX */ 81 { BMCR_S100|BMCR_FDX, ANAR_CSMA|ANAR_TX_FD, 82 0, }, 83 84 /* 1000baseX */ 85 { BMCR_S1000, ANAR_CSMA, 86 0, }, 87 88 /* 1000baseX-FDX */ 89 { BMCR_S1000|BMCR_FDX, ANAR_CSMA, 90 0, }, 91 92 /* 1000baseT */ 93 { BMCR_S1000, ANAR_CSMA, 94 GTCR_ADV_1000THDX }, 95 96 /* 1000baseT-FDX */ 97 { BMCR_S1000, ANAR_CSMA, 98 GTCR_ADV_1000TFDX }, 99 }; 100 101 void 102 mii_phy_setmedia(struct mii_softc *sc) 103 { 104 struct mii_data *mii = sc->mii_pdata; 105 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 106 int bmcr, anar, gtcr; 107 108 if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO) { 109 /* 110 * Force renegotiation if MIIF_DOPAUSE or MIIF_FORCEANEG. 111 * The former is necessary as we might switch from flow- 112 * control advertisement being off to on or vice versa. 113 */ 114 if ((PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) == 0 || 115 (sc->mii_flags & (MIIF_DOPAUSE | MIIF_FORCEANEG)) != 0) 116 (void)mii_phy_auto(sc); 117 return; 118 } 119 120 /* 121 * Table index is stored in the media entry. 122 */ 123 124 KASSERT(ife->ifm_data >=0 && ife->ifm_data < MII_NMEDIA, 125 ("invalid ife->ifm_data (0x%x) in mii_phy_setmedia", 126 ife->ifm_data)); 127 128 anar = mii_media_table[ife->ifm_data].mm_anar; 129 bmcr = mii_media_table[ife->ifm_data].mm_bmcr; 130 gtcr = mii_media_table[ife->ifm_data].mm_gtcr; 131 132 if (IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T) { 133 gtcr |= GTCR_MAN_MS; 134 if ((ife->ifm_media & IFM_ETH_MASTER) != 0) 135 gtcr |= GTCR_ADV_MS; 136 } 137 138 if ((ife->ifm_media & IFM_FDX) != 0 && 139 ((ife->ifm_media & IFM_FLOW) != 0 || 140 (sc->mii_flags & MIIF_FORCEPAUSE) != 0)) { 141 if ((sc->mii_flags & MIIF_IS_1000X) != 0) 142 anar |= ANAR_X_PAUSE_TOWARDS; 143 else { 144 anar |= ANAR_FC; 145 /* XXX Only 1000BASE-T has PAUSE_ASYM? */ 146 if ((sc->mii_flags & MIIF_HAVE_GTCR) != 0 && 147 (sc->mii_extcapabilities & 148 (EXTSR_1000THDX | EXTSR_1000TFDX)) != 0) 149 anar |= ANAR_X_PAUSE_ASYM; 150 } 151 } 152 153 PHY_WRITE(sc, MII_ANAR, anar); 154 PHY_WRITE(sc, MII_BMCR, bmcr); 155 if ((sc->mii_flags & MIIF_HAVE_GTCR) != 0) 156 PHY_WRITE(sc, MII_100T2CR, gtcr); 157 } 158 159 int 160 mii_phy_auto(struct mii_softc *sc) 161 { 162 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 163 int anar, gtcr; 164 165 /* 166 * Check for 1000BASE-X. Autonegotiation is a bit 167 * different on such devices. 168 */ 169 if ((sc->mii_flags & MIIF_IS_1000X) != 0) { 170 anar = 0; 171 if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0) 172 anar |= ANAR_X_FD; 173 if ((sc->mii_extcapabilities & EXTSR_1000XHDX) != 0) 174 anar |= ANAR_X_HD; 175 176 if ((ife->ifm_media & IFM_FLOW) != 0 || 177 (sc->mii_flags & MIIF_FORCEPAUSE) != 0) 178 anar |= ANAR_X_PAUSE_TOWARDS; 179 PHY_WRITE(sc, MII_ANAR, anar); 180 } else { 181 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | 182 ANAR_CSMA; 183 if ((ife->ifm_media & IFM_FLOW) != 0 || 184 (sc->mii_flags & MIIF_FORCEPAUSE) != 0) { 185 if ((sc->mii_capabilities & 186 (BMSR_10TFDX | BMSR_100TXFDX)) != 0) 187 anar |= ANAR_FC; 188 /* XXX Only 1000BASE-T has PAUSE_ASYM? */ 189 if (((sc->mii_flags & MIIF_HAVE_GTCR) != 0) && 190 (sc->mii_extcapabilities & 191 (EXTSR_1000THDX | EXTSR_1000TFDX)) != 0) 192 anar |= ANAR_X_PAUSE_ASYM; 193 } 194 PHY_WRITE(sc, MII_ANAR, anar); 195 if ((sc->mii_flags & MIIF_HAVE_GTCR) != 0) { 196 gtcr = 0; 197 if ((sc->mii_extcapabilities & EXTSR_1000TFDX) != 0) 198 gtcr |= GTCR_ADV_1000TFDX; 199 if ((sc->mii_extcapabilities & EXTSR_1000THDX) != 0) 200 gtcr |= GTCR_ADV_1000THDX; 201 PHY_WRITE(sc, MII_100T2CR, gtcr); 202 } 203 } 204 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 205 return (EJUSTRETURN); 206 } 207 208 int 209 mii_phy_tick(struct mii_softc *sc) 210 { 211 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 212 int reg; 213 214 /* 215 * If we're not doing autonegotiation, we don't need to do 216 * any extra work here. However, we need to check the link 217 * status so we can generate an announcement if the status 218 * changes. 219 */ 220 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 221 sc->mii_ticks = 0; /* reset autonegotiation timer. */ 222 return (0); 223 } 224 225 /* Read the status register twice; BMSR_LINK is latch-low. */ 226 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 227 if ((reg & BMSR_LINK) != 0) { 228 sc->mii_ticks = 0; /* reset autonegotiation timer. */ 229 /* See above. */ 230 return (0); 231 } 232 233 /* Announce link loss right after it happens */ 234 if (sc->mii_ticks++ == 0) 235 return (0); 236 237 /* XXX: use default value if phy driver did not set mii_anegticks */ 238 if (sc->mii_anegticks == 0) 239 sc->mii_anegticks = MII_ANEGTICKS_GIGE; 240 241 /* Only retry autonegotiation every mii_anegticks ticks. */ 242 if (sc->mii_ticks <= sc->mii_anegticks) 243 return (EJUSTRETURN); 244 245 sc->mii_ticks = 0; 246 PHY_RESET(sc); 247 mii_phy_auto(sc); 248 return (0); 249 } 250 251 void 252 mii_phy_reset(struct mii_softc *sc) 253 { 254 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 255 int i, reg; 256 257 if ((sc->mii_flags & MIIF_NOISOLATE) != 0) 258 reg = BMCR_RESET; 259 else 260 reg = BMCR_RESET | BMCR_ISO; 261 PHY_WRITE(sc, MII_BMCR, reg); 262 263 /* Wait 100ms for it to complete. */ 264 for (i = 0; i < 100; i++) { 265 reg = PHY_READ(sc, MII_BMCR); 266 if ((reg & BMCR_RESET) == 0) 267 break; 268 DELAY(1000); 269 } 270 271 /* NB: a PHY may default to being powered down and/or isolated. */ 272 reg &= ~(BMCR_PDOWN | BMCR_ISO); 273 if ((sc->mii_flags & MIIF_NOISOLATE) == 0 && 274 ((ife == NULL && sc->mii_inst != 0) || 275 (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst))) 276 reg |= BMCR_ISO; 277 if (PHY_READ(sc, MII_BMCR) != reg) 278 PHY_WRITE(sc, MII_BMCR, reg); 279 } 280 281 void 282 mii_phy_update(struct mii_softc *sc, int cmd) 283 { 284 struct mii_data *mii = sc->mii_pdata; 285 286 if (sc->mii_media_active != mii->mii_media_active || 287 cmd == MII_MEDIACHG) { 288 MIIBUS_STATCHG(sc->mii_dev); 289 sc->mii_media_active = mii->mii_media_active; 290 } 291 if (sc->mii_media_status != mii->mii_media_status) { 292 MIIBUS_LINKCHG(sc->mii_dev); 293 sc->mii_media_status = mii->mii_media_status; 294 } 295 } 296 297 /* 298 * Initialize generic PHY media based on BMSR, called when a PHY is 299 * attached. We expect to be set up to print a comma-separated list 300 * of media names. Does not print a newline. 301 */ 302 void 303 mii_phy_add_media(struct mii_softc *sc) 304 { 305 struct mii_data *mii = sc->mii_pdata; 306 const char *sep = ""; 307 int fdx = 0; 308 309 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0 && 310 (sc->mii_extcapabilities & EXTSR_MEDIAMASK) == 0) { 311 printf("no media present"); 312 return; 313 } 314 315 /* 316 * Set the autonegotiation timer for 10/100 media. Gigabit media is 317 * handled below. 318 */ 319 sc->mii_anegticks = MII_ANEGTICKS; 320 321 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 322 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 323 324 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) { 325 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 326 MII_MEDIA_NONE); 327 PRINT("none"); 328 } 329 330 /* 331 * There are different interpretations for the bits in 332 * HomePNA PHYs. And there is really only one media type 333 * that is supported. 334 */ 335 if ((sc->mii_flags & MIIF_IS_HPNA) != 0) { 336 if ((sc->mii_capabilities & BMSR_10THDX) != 0) { 337 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_HPNA_1, 0, 338 sc->mii_inst), MII_MEDIA_10_T); 339 PRINT("HomePNA1"); 340 } 341 return; 342 } 343 344 if ((sc->mii_capabilities & BMSR_10THDX) != 0) { 345 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst), 346 MII_MEDIA_10_T); 347 PRINT("10baseT"); 348 } 349 if ((sc->mii_capabilities & BMSR_10TFDX) != 0) { 350 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst), 351 MII_MEDIA_10_T_FDX); 352 PRINT("10baseT-FDX"); 353 if ((sc->mii_flags & MIIF_DOPAUSE) != 0 && 354 (sc->mii_flags & MIIF_NOMANPAUSE) == 0) { 355 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 356 IFM_FDX | IFM_FLOW, sc->mii_inst), 357 MII_MEDIA_10_T_FDX); 358 PRINT("10baseT-FDX-flow"); 359 } 360 fdx = 1; 361 } 362 if ((sc->mii_capabilities & BMSR_100TXHDX) != 0) { 363 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst), 364 MII_MEDIA_100_TX); 365 PRINT("100baseTX"); 366 } 367 if ((sc->mii_capabilities & BMSR_100TXFDX) != 0) { 368 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst), 369 MII_MEDIA_100_TX_FDX); 370 PRINT("100baseTX-FDX"); 371 if ((sc->mii_flags & MIIF_DOPAUSE) != 0 && 372 (sc->mii_flags & MIIF_NOMANPAUSE) == 0) { 373 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 374 IFM_FDX | IFM_FLOW, sc->mii_inst), 375 MII_MEDIA_100_TX_FDX); 376 PRINT("100baseTX-FDX-flow"); 377 } 378 fdx = 1; 379 } 380 if ((sc->mii_capabilities & BMSR_100T4) != 0) { 381 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, sc->mii_inst), 382 MII_MEDIA_100_T4); 383 PRINT("100baseT4"); 384 } 385 386 if ((sc->mii_extcapabilities & EXTSR_MEDIAMASK) != 0) { 387 /* 388 * XXX Right now only handle 1000SX and 1000TX. Need 389 * XXX to handle 1000LX and 1000CX somehow. 390 */ 391 if ((sc->mii_extcapabilities & EXTSR_1000XHDX) != 0) { 392 sc->mii_anegticks = MII_ANEGTICKS_GIGE; 393 sc->mii_flags |= MIIF_IS_1000X; 394 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, 395 sc->mii_inst), MII_MEDIA_1000_X); 396 PRINT("1000baseSX"); 397 } 398 if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0) { 399 sc->mii_anegticks = MII_ANEGTICKS_GIGE; 400 sc->mii_flags |= MIIF_IS_1000X; 401 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, 402 sc->mii_inst), MII_MEDIA_1000_X_FDX); 403 PRINT("1000baseSX-FDX"); 404 if ((sc->mii_flags & MIIF_DOPAUSE) != 0 && 405 (sc->mii_flags & MIIF_NOMANPAUSE) == 0) { 406 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 407 IFM_FDX | IFM_FLOW, sc->mii_inst), 408 MII_MEDIA_1000_X_FDX); 409 PRINT("1000baseSX-FDX-flow"); 410 } 411 fdx = 1; 412 } 413 414 /* 415 * 1000baseT media needs to be able to manipulate 416 * master/slave mode. 417 * 418 * All 1000baseT PHYs have a 1000baseT control register. 419 */ 420 if ((sc->mii_extcapabilities & EXTSR_1000THDX) != 0) { 421 sc->mii_anegticks = MII_ANEGTICKS_GIGE; 422 sc->mii_flags |= MIIF_HAVE_GTCR; 423 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 0, 424 sc->mii_inst), MII_MEDIA_1000_T); 425 PRINT("1000baseT"); 426 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 427 IFM_ETH_MASTER, sc->mii_inst), MII_MEDIA_1000_T); 428 PRINT("1000baseT-master"); 429 } 430 if ((sc->mii_extcapabilities & EXTSR_1000TFDX) != 0) { 431 sc->mii_anegticks = MII_ANEGTICKS_GIGE; 432 sc->mii_flags |= MIIF_HAVE_GTCR; 433 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, IFM_FDX, 434 sc->mii_inst), MII_MEDIA_1000_T_FDX); 435 PRINT("1000baseT-FDX"); 436 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 437 IFM_FDX | IFM_ETH_MASTER, sc->mii_inst), 438 MII_MEDIA_1000_T_FDX); 439 PRINT("1000baseT-FDX-master"); 440 if ((sc->mii_flags & MIIF_DOPAUSE) != 0 && 441 (sc->mii_flags & MIIF_NOMANPAUSE) == 0) { 442 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 443 IFM_FDX | IFM_FLOW, sc->mii_inst), 444 MII_MEDIA_1000_T_FDX); 445 PRINT("1000baseT-FDX-flow"); 446 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 447 IFM_FDX | IFM_FLOW | IFM_ETH_MASTER, 448 sc->mii_inst), MII_MEDIA_1000_T_FDX); 449 PRINT("1000baseT-FDX-flow-master"); 450 } 451 fdx = 1; 452 } 453 } 454 455 if ((sc->mii_capabilities & BMSR_ANEG) != 0) { 456 /* intentionally invalid index */ 457 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 458 MII_NMEDIA); 459 PRINT("auto"); 460 if (fdx != 0 && (sc->mii_flags & MIIF_DOPAUSE) != 0) { 461 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, IFM_FLOW, 462 sc->mii_inst), MII_NMEDIA); 463 PRINT("auto-flow"); 464 } 465 } 466 #undef ADD 467 #undef PRINT 468 } 469 470 int 471 mii_phy_detach(device_t dev) 472 { 473 struct mii_softc *sc; 474 475 sc = device_get_softc(dev); 476 sc->mii_dev = NULL; 477 LIST_REMOVE(sc, mii_list); 478 return (0); 479 } 480 481 const struct mii_phydesc * 482 mii_phy_match_gen(const struct mii_attach_args *ma, 483 const struct mii_phydesc *mpd, size_t len) 484 { 485 486 for (; mpd->mpd_name != NULL; 487 mpd = (const struct mii_phydesc *)((const char *)mpd + len)) { 488 if (MII_OUI(ma->mii_id1, ma->mii_id2) == mpd->mpd_oui && 489 MII_MODEL(ma->mii_id2) == mpd->mpd_model) 490 return (mpd); 491 } 492 return (NULL); 493 } 494 495 const struct mii_phydesc * 496 mii_phy_match(const struct mii_attach_args *ma, const struct mii_phydesc *mpd) 497 { 498 499 return (mii_phy_match_gen(ma, mpd, sizeof(struct mii_phydesc))); 500 } 501 502 int 503 mii_phy_dev_probe(device_t dev, const struct mii_phydesc *mpd, int mrv) 504 { 505 506 mpd = mii_phy_match(device_get_ivars(dev), mpd); 507 if (mpd != NULL) { 508 device_set_desc(dev, mpd->mpd_name); 509 return (mrv); 510 } 511 return (ENXIO); 512 } 513 514 void 515 mii_phy_dev_attach(device_t dev, u_int flags, const struct mii_phy_funcs *mpf, 516 int add_media) 517 { 518 struct mii_softc *sc; 519 struct mii_attach_args *ma; 520 struct mii_data *mii; 521 522 sc = device_get_softc(dev); 523 ma = device_get_ivars(dev); 524 sc->mii_dev = device_get_parent(dev); 525 mii = ma->mii_data; 526 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 527 528 sc->mii_flags = flags | miibus_get_flags(dev); 529 sc->mii_mpd_oui = MII_OUI(ma->mii_id1, ma->mii_id2); 530 sc->mii_mpd_model = MII_MODEL(ma->mii_id2); 531 sc->mii_mpd_rev = MII_REV(ma->mii_id2); 532 sc->mii_capmask = ma->mii_capmask; 533 sc->mii_inst = mii->mii_instance++; 534 sc->mii_phy = ma->mii_phyno; 535 sc->mii_offset = ma->mii_offset; 536 sc->mii_funcs = mpf; 537 sc->mii_pdata = mii; 538 539 if (bootverbose) 540 device_printf(dev, "OUI 0x%06x, model 0x%04x, rev. %d\n", 541 sc->mii_mpd_oui, sc->mii_mpd_model, sc->mii_mpd_rev); 542 543 if (add_media == 0) 544 return; 545 546 PHY_RESET(sc); 547 548 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & sc->mii_capmask; 549 if (sc->mii_capabilities & BMSR_EXTSTAT) 550 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR); 551 device_printf(dev, " "); 552 mii_phy_add_media(sc); 553 printf("\n"); 554 555 MIIBUS_MEDIAINIT(sc->mii_dev); 556 } 557 558 /* 559 * Return the flow control status flag from MII_ANAR & MII_ANLPAR. 560 */ 561 u_int 562 mii_phy_flowstatus(struct mii_softc *sc) 563 { 564 int anar, anlpar; 565 566 if ((sc->mii_flags & MIIF_DOPAUSE) == 0) 567 return (0); 568 569 anar = PHY_READ(sc, MII_ANAR); 570 anlpar = PHY_READ(sc, MII_ANLPAR); 571 572 /* 573 * Check for 1000BASE-X. Autonegotiation is a bit 574 * different on such devices. 575 */ 576 if ((sc->mii_flags & MIIF_IS_1000X) != 0) { 577 anar <<= 3; 578 anlpar <<= 3; 579 } 580 581 if ((anar & ANAR_PAUSE_SYM) != 0 && (anlpar & ANLPAR_PAUSE_SYM) != 0) 582 return (IFM_FLOW | IFM_ETH_TXPAUSE | IFM_ETH_RXPAUSE); 583 584 if ((anar & ANAR_PAUSE_SYM) == 0) { 585 if ((anar & ANAR_PAUSE_ASYM) != 0 && 586 (anlpar & ANLPAR_PAUSE_TOWARDS) != 0) 587 return (IFM_FLOW | IFM_ETH_TXPAUSE); 588 else 589 return (0); 590 } 591 592 if ((anar & ANAR_PAUSE_ASYM) == 0) { 593 if ((anlpar & ANLPAR_PAUSE_SYM) != 0) 594 return (IFM_FLOW | IFM_ETH_TXPAUSE | IFM_ETH_RXPAUSE); 595 else 596 return (0); 597 } 598 599 switch ((anlpar & ANLPAR_PAUSE_TOWARDS)) { 600 case ANLPAR_PAUSE_NONE: 601 return (0); 602 case ANLPAR_PAUSE_ASYM: 603 return (IFM_FLOW | IFM_ETH_RXPAUSE); 604 default: 605 return (IFM_FLOW | IFM_ETH_RXPAUSE | IFM_ETH_TXPAUSE); 606 } 607 /* NOTREACHED */ 608 } 609