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 if ((PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) == 0 || 110 (sc->mii_flags & MIIF_FORCEANEG) != 0) 111 (void)mii_phy_auto(sc); 112 return; 113 } 114 115 /* 116 * Table index is stored in the media entry. 117 */ 118 119 KASSERT(ife->ifm_data >=0 && ife->ifm_data < MII_NMEDIA, 120 ("invalid ife->ifm_data (0x%x) in mii_phy_setmedia", 121 ife->ifm_data)); 122 123 anar = mii_media_table[ife->ifm_data].mm_anar; 124 bmcr = mii_media_table[ife->ifm_data].mm_bmcr; 125 gtcr = mii_media_table[ife->ifm_data].mm_gtcr; 126 127 if ((mii->mii_media.ifm_media & IFM_ETH_MASTER) != 0) { 128 switch (IFM_SUBTYPE(ife->ifm_media)) { 129 case IFM_1000_T: 130 gtcr |= GTCR_MAN_MS | GTCR_ADV_MS; 131 break; 132 133 default: 134 printf("mii_phy_setmedia: MASTER on wrong media\n"); 135 } 136 } 137 138 if ((ife->ifm_media & IFM_LOOP) != 0) 139 bmcr |= BMCR_LOOP; 140 141 PHY_WRITE(sc, MII_ANAR, anar); 142 PHY_WRITE(sc, MII_BMCR, bmcr); 143 if ((sc->mii_flags & MIIF_HAVE_GTCR) != 0) 144 PHY_WRITE(sc, MII_100T2CR, gtcr); 145 } 146 147 int 148 mii_phy_auto(struct mii_softc *sc) 149 { 150 int anar, gtcr; 151 152 /* 153 * Check for 1000BASE-X. Autonegotiation is a bit 154 * different on such devices. 155 */ 156 if ((sc->mii_flags & MIIF_IS_1000X) != 0) { 157 anar = 0; 158 if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0) 159 anar |= ANAR_X_FD; 160 if ((sc->mii_extcapabilities & EXTSR_1000XHDX) != 0) 161 anar |= ANAR_X_HD; 162 163 if ((sc->mii_flags & MIIF_DOPAUSE) != 0) { 164 /* XXX Asymmetric vs. symmetric? */ 165 anar |= ANLPAR_X_PAUSE_TOWARDS; 166 } 167 PHY_WRITE(sc, MII_ANAR, anar); 168 } else { 169 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | 170 ANAR_CSMA; 171 if ((sc->mii_flags & MIIF_DOPAUSE) != 0) 172 anar |= ANAR_FC; 173 PHY_WRITE(sc, MII_ANAR, anar); 174 if ((sc->mii_flags & MIIF_HAVE_GTCR) != 0) { 175 gtcr = 0; 176 if ((sc->mii_extcapabilities & EXTSR_1000TFDX) != 0) 177 gtcr |= GTCR_ADV_1000TFDX; 178 if ((sc->mii_extcapabilities & EXTSR_1000THDX) != 0) 179 gtcr |= GTCR_ADV_1000THDX; 180 PHY_WRITE(sc, MII_100T2CR, gtcr); 181 } 182 } 183 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 184 return (EJUSTRETURN); 185 } 186 187 int 188 mii_phy_tick(struct mii_softc *sc) 189 { 190 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 191 struct ifnet *ifp = sc->mii_pdata->mii_ifp; 192 int reg; 193 194 /* Just bail now if the interface is down. */ 195 if ((ifp->if_flags & IFF_UP) == 0) 196 return (EJUSTRETURN); 197 198 /* 199 * If we're not doing autonegotiation, we don't need to do 200 * any extra work here. However, we need to check the link 201 * status so we can generate an announcement if the status 202 * changes. 203 */ 204 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 205 sc->mii_ticks = 0; /* reset autonegotiation timer. */ 206 return (0); 207 } 208 209 /* Read the status register twice; BMSR_LINK is latch-low. */ 210 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 211 if ((reg & BMSR_LINK) != 0) { 212 sc->mii_ticks = 0; /* reset autonegotiation timer. */ 213 /* See above. */ 214 return (0); 215 } 216 217 /* Announce link loss right after it happens */ 218 if (sc->mii_ticks++ == 0) 219 return (0); 220 221 /* XXX: use default value if phy driver did not set mii_anegticks */ 222 if (sc->mii_anegticks == 0) 223 sc->mii_anegticks = MII_ANEGTICKS_GIGE; 224 225 /* Only retry autonegotiation every mii_anegticks ticks. */ 226 if (sc->mii_ticks <= sc->mii_anegticks) 227 return (EJUSTRETURN); 228 229 sc->mii_ticks = 0; 230 mii_phy_reset(sc); 231 mii_phy_auto(sc); 232 return (0); 233 } 234 235 void 236 mii_phy_reset(struct mii_softc *sc) 237 { 238 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 239 int reg, i; 240 241 if ((sc->mii_flags & MIIF_NOISOLATE) != 0) 242 reg = BMCR_RESET; 243 else 244 reg = BMCR_RESET | BMCR_ISO; 245 PHY_WRITE(sc, MII_BMCR, reg); 246 247 /* Wait 100ms for it to complete. */ 248 for (i = 0; i < 100; i++) { 249 reg = PHY_READ(sc, MII_BMCR); 250 if ((reg & BMCR_RESET) == 0) 251 break; 252 DELAY(1000); 253 } 254 255 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) { 256 if ((ife == NULL && sc->mii_inst != 0) || 257 (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst)) 258 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 259 } 260 } 261 262 void 263 mii_phy_down(struct mii_softc *sc) 264 { 265 266 } 267 268 void 269 mii_phy_update(struct mii_softc *sc, int cmd) 270 { 271 struct mii_data *mii = sc->mii_pdata; 272 273 if (sc->mii_media_active != mii->mii_media_active || 274 cmd == MII_MEDIACHG) { 275 MIIBUS_STATCHG(sc->mii_dev); 276 sc->mii_media_active = mii->mii_media_active; 277 } 278 if (sc->mii_media_status != mii->mii_media_status) { 279 MIIBUS_LINKCHG(sc->mii_dev); 280 sc->mii_media_status = mii->mii_media_status; 281 } 282 } 283 284 /* 285 * Initialize generic PHY media based on BMSR, called when a PHY is 286 * attached. We expect to be set up to print a comma-separated list 287 * of media names. Does not print a newline. 288 */ 289 void 290 mii_phy_add_media(struct mii_softc *sc) 291 { 292 struct mii_data *mii = sc->mii_pdata; 293 const char *sep = ""; 294 295 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0 && 296 (sc->mii_extcapabilities & EXTSR_MEDIAMASK) == 0) { 297 printf("no media present"); 298 return; 299 } 300 301 /* 302 * Set the autonegotiation timer for 10/100 media. Gigabit media is 303 * handled below. 304 */ 305 sc->mii_anegticks = MII_ANEGTICKS; 306 307 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 308 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 309 310 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) 311 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 312 MII_MEDIA_NONE); 313 314 /* 315 * There are different interpretations for the bits in 316 * HomePNA PHYs. And there is really only one media type 317 * that is supported. 318 */ 319 if ((sc->mii_flags & MIIF_IS_HPNA) != 0) { 320 if ((sc->mii_capabilities & BMSR_10THDX) != 0) { 321 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_HPNA_1, 0, 322 sc->mii_inst), MII_MEDIA_10_T); 323 PRINT("HomePNA1"); 324 } 325 return; 326 } 327 328 if ((sc->mii_capabilities & BMSR_10THDX) != 0) { 329 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst), 330 MII_MEDIA_10_T); 331 PRINT("10baseT"); 332 } 333 if ((sc->mii_capabilities & BMSR_10TFDX) != 0) { 334 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst), 335 MII_MEDIA_10_T_FDX); 336 PRINT("10baseT-FDX"); 337 } 338 if ((sc->mii_capabilities & BMSR_100TXHDX) != 0) { 339 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst), 340 MII_MEDIA_100_TX); 341 PRINT("100baseTX"); 342 } 343 if ((sc->mii_capabilities & BMSR_100TXFDX) != 0) { 344 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst), 345 MII_MEDIA_100_TX_FDX); 346 PRINT("100baseTX-FDX"); 347 } 348 if ((sc->mii_capabilities & BMSR_100T4) != 0) { 349 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, sc->mii_inst), 350 MII_MEDIA_100_T4); 351 PRINT("100baseT4"); 352 } 353 354 if ((sc->mii_extcapabilities & EXTSR_MEDIAMASK) != 0) { 355 /* 356 * XXX Right now only handle 1000SX and 1000TX. Need 357 * XXX to handle 1000LX and 1000CX somehow. 358 */ 359 if ((sc->mii_extcapabilities & EXTSR_1000XHDX) != 0) { 360 sc->mii_anegticks = MII_ANEGTICKS_GIGE; 361 sc->mii_flags |= MIIF_IS_1000X; 362 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, 363 sc->mii_inst), MII_MEDIA_1000_X); 364 PRINT("1000baseSX"); 365 } 366 if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0) { 367 sc->mii_anegticks = MII_ANEGTICKS_GIGE; 368 sc->mii_flags |= MIIF_IS_1000X; 369 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, 370 sc->mii_inst), MII_MEDIA_1000_X_FDX); 371 PRINT("1000baseSX-FDX"); 372 } 373 374 /* 375 * 1000baseT media needs to be able to manipulate 376 * master/slave mode. We set IFM_ETH_MASTER in 377 * the "don't care mask" and filter it out when 378 * the media is set. 379 * 380 * All 1000baseT PHYs have a 1000baseT control register. 381 */ 382 if ((sc->mii_extcapabilities & EXTSR_1000THDX) != 0) { 383 sc->mii_anegticks = MII_ANEGTICKS_GIGE; 384 sc->mii_flags |= MIIF_HAVE_GTCR; 385 mii->mii_media.ifm_mask |= IFM_ETH_MASTER; 386 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 0, 387 sc->mii_inst), MII_MEDIA_1000_T); 388 PRINT("1000baseT"); 389 } 390 if ((sc->mii_extcapabilities & EXTSR_1000TFDX) != 0) { 391 sc->mii_anegticks = MII_ANEGTICKS_GIGE; 392 sc->mii_flags |= MIIF_HAVE_GTCR; 393 mii->mii_media.ifm_mask |= IFM_ETH_MASTER; 394 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, IFM_FDX, 395 sc->mii_inst), MII_MEDIA_1000_T_FDX); 396 PRINT("1000baseT-FDX"); 397 } 398 } 399 400 if ((sc->mii_capabilities & BMSR_ANEG) != 0) { 401 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 402 MII_NMEDIA); /* intentionally invalid index */ 403 PRINT("auto"); 404 } 405 #undef ADD 406 #undef PRINT 407 } 408 409 int 410 mii_phy_detach(device_t dev) 411 { 412 struct mii_softc *sc; 413 414 sc = device_get_softc(dev); 415 mii_phy_down(sc); 416 sc->mii_dev = NULL; 417 LIST_REMOVE(sc, mii_list); 418 return (0); 419 } 420 421 const struct mii_phydesc * 422 mii_phy_match_gen(const struct mii_attach_args *ma, 423 const struct mii_phydesc *mpd, size_t len) 424 { 425 426 for (; mpd->mpd_name != NULL; 427 mpd = (const struct mii_phydesc *) ((const char *) mpd + len)) { 428 if (MII_OUI(ma->mii_id1, ma->mii_id2) == mpd->mpd_oui && 429 MII_MODEL(ma->mii_id2) == mpd->mpd_model) 430 return (mpd); 431 } 432 return (NULL); 433 } 434 435 const struct mii_phydesc * 436 mii_phy_match(const struct mii_attach_args *ma, const struct mii_phydesc *mpd) 437 { 438 439 return (mii_phy_match_gen(ma, mpd, sizeof(struct mii_phydesc))); 440 } 441 442 int 443 mii_phy_dev_probe(device_t dev, const struct mii_phydesc *mpd, int mrv) 444 { 445 446 mpd = mii_phy_match(device_get_ivars(dev), mpd); 447 if (mpd != NULL) { 448 device_set_desc(dev, mpd->mpd_name); 449 return (mrv); 450 } 451 return (ENXIO); 452 } 453