mii_physubr.c revision 1.17
1 /* $NetBSD: mii_physubr.c,v 1.17 2000/03/23 07:01:36 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2000 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/device.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/socket.h> 49 #include <sys/errno.h> 50 51 #include <net/if.h> 52 #include <net/if_media.h> 53 #include <net/route.h> 54 55 #include <dev/mii/mii.h> 56 #include <dev/mii/miivar.h> 57 58 /* 59 * Media to register setting conversion table. Order matters. 60 */ 61 const struct mii_media mii_media_table[] = { 62 { BMCR_ISO, ANAR_CSMA }, /* None */ 63 { 0, ANAR_CSMA|ANAR_10 }, /* 10baseT */ 64 { BMCR_FDX, ANAR_CSMA|ANAR_10_FD }, /* 10baseT-FDX */ 65 { BMCR_S100, ANAR_CSMA|ANAR_T4 }, /* 100baseT4 */ 66 { BMCR_S100, ANAR_CSMA|ANAR_TX }, /* 100baseTX */ 67 { BMCR_S100|BMCR_FDX, ANAR_CSMA|ANAR_TX_FD }, /* 100baseTX-FDX */ 68 }; 69 70 void mii_phy_auto_timeout __P((void *)); 71 72 void 73 mii_phy_setmedia(sc) 74 struct mii_softc *sc; 75 { 76 struct mii_data *mii = sc->mii_pdata; 77 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 78 int bmcr, anar; 79 80 if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO) { 81 if ((PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) == 0) 82 (void) mii_phy_auto(sc, 1); 83 return; 84 } 85 86 /* 87 * Table index is stored in the media entry. 88 */ 89 90 #ifdef DIAGNOSTIC 91 if (ife->ifm_data < 0 || ife->ifm_data >= MII_NMEDIA) 92 panic("mii_phy_setmedia"); 93 #endif 94 95 anar = mii_media_table[ife->ifm_data].mm_anar; 96 bmcr = mii_media_table[ife->ifm_data].mm_bmcr; 97 98 if (ife->ifm_media & IFM_LOOP) 99 bmcr |= BMCR_LOOP; 100 101 PHY_WRITE(sc, MII_ANAR, anar); 102 PHY_WRITE(sc, MII_BMCR, bmcr); 103 } 104 105 int 106 mii_phy_auto(sc, waitfor) 107 struct mii_softc *sc; 108 int waitfor; 109 { 110 int bmsr, i; 111 112 if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) { 113 PHY_WRITE(sc, MII_ANAR, 114 BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA); 115 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 116 } 117 118 if (waitfor) { 119 /* Wait 500ms for it to complete. */ 120 for (i = 0; i < 500; i++) { 121 if ((bmsr = PHY_READ(sc, MII_BMSR)) & BMSR_ACOMP) 122 return (0); 123 delay(1000); 124 } 125 126 /* 127 * Don't need to worry about clearing MIIF_DOINGAUTO. 128 * If that's set, a timeout is pending, and it will 129 * clear the flag. 130 */ 131 return (EIO); 132 } 133 134 /* 135 * Just let it finish asynchronously. This is for the benefit of 136 * the tick handler driving autonegotiation. Don't want 500ms 137 * delays all the time while the system is running! 138 */ 139 if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) { 140 sc->mii_flags |= MIIF_DOINGAUTO; 141 callout_reset(&sc->mii_nway_ch, hz >> 1, 142 mii_phy_auto_timeout, sc); 143 } 144 return (EJUSTRETURN); 145 } 146 147 void 148 mii_phy_auto_timeout(arg) 149 void *arg; 150 { 151 struct mii_softc *sc = arg; 152 int s, bmsr; 153 154 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0) 155 return; 156 157 s = splnet(); 158 sc->mii_flags &= ~MIIF_DOINGAUTO; 159 bmsr = PHY_READ(sc, MII_BMSR); 160 161 /* Update the media status. */ 162 (void) (*sc->mii_service)(sc, sc->mii_pdata, MII_POLLSTAT); 163 splx(s); 164 } 165 166 int 167 mii_phy_tick(sc) 168 struct mii_softc *sc; 169 { 170 struct mii_data *mii = sc->mii_pdata; 171 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 172 int reg; 173 174 /* Just bail now if the interface is down. */ 175 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 176 return (EJUSTRETURN); 177 178 /* 179 * If we're not doing autonegotiation, we don't need to do 180 * any extra work here. However, we need to check the link 181 * status so we can generate an announcement if the status 182 * changes. 183 */ 184 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 185 return (0); 186 187 /* Read the status register twice; BMSR_LINK is latch-low. */ 188 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 189 if (reg & BMSR_LINK) { 190 /* 191 * See above. 192 */ 193 return (0); 194 } 195 196 /* 197 * Only retry autonegotiation every 5 seconds. 198 */ 199 if (++sc->mii_ticks != 5) 200 return (EJUSTRETURN); 201 202 sc->mii_ticks = 0; 203 mii_phy_reset(sc); 204 205 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 206 return (EJUSTRETURN); 207 208 /* 209 * Might need to generate a status message if autonegotiation 210 * failed. 211 */ 212 return (0); 213 } 214 215 void 216 mii_phy_reset(sc) 217 struct mii_softc *sc; 218 { 219 int reg, i; 220 221 if (sc->mii_flags & MIIF_NOISOLATE) 222 reg = BMCR_RESET; 223 else 224 reg = BMCR_RESET | BMCR_ISO; 225 PHY_WRITE(sc, MII_BMCR, reg); 226 227 /* Wait 100ms for it to complete. */ 228 for (i = 0; i < 100; i++) { 229 reg = PHY_READ(sc, MII_BMCR); 230 if ((reg & BMCR_RESET) == 0) 231 break; 232 delay(1000); 233 } 234 235 if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) 236 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 237 } 238 239 void 240 mii_phy_down(sc) 241 struct mii_softc *sc; 242 { 243 244 if (sc->mii_flags & MIIF_DOINGAUTO) { 245 sc->mii_flags &= ~MIIF_DOINGAUTO; 246 callout_stop(&sc->mii_nway_ch); 247 } 248 } 249 250 void 251 mii_phy_status(sc) 252 struct mii_softc *sc; 253 { 254 255 (*sc->mii_status)(sc); 256 } 257 258 void 259 mii_phy_update(sc, cmd) 260 struct mii_softc *sc; 261 int cmd; 262 { 263 struct mii_data *mii = sc->mii_pdata; 264 265 if (sc->mii_media_active != mii->mii_media_active || 266 sc->mii_media_status != mii->mii_media_status || 267 cmd == MII_MEDIACHG) { 268 (*mii->mii_statchg)(sc->mii_dev.dv_parent); 269 mii_phy_statusmsg(sc); 270 sc->mii_media_active = mii->mii_media_active; 271 sc->mii_media_status = mii->mii_media_status; 272 } 273 } 274 275 void 276 mii_phy_statusmsg(sc) 277 struct mii_softc *sc; 278 { 279 struct mii_data *mii = sc->mii_pdata; 280 struct ifnet *ifp = mii->mii_ifp; 281 int s, baudrate, link_state, announce = 0; 282 283 if (mii->mii_media_status & IFM_AVALID) { 284 if (mii->mii_media_status & IFM_ACTIVE) 285 link_state = LINK_STATE_UP; 286 else 287 link_state = LINK_STATE_DOWN; 288 } else 289 link_state = LINK_STATE_UNKNOWN; 290 291 baudrate = ifmedia_baudrate(mii->mii_media_active); 292 293 if (link_state != ifp->if_link_state) { 294 ifp->if_link_state = link_state; 295 /* 296 * XXX Right here we'd like to notify protocols 297 * XXX that the link status has changed, so that 298 * XXX e.g. Duplicate Address Detection can restart. 299 */ 300 announce = 1; 301 } 302 303 if (baudrate != ifp->if_baudrate) { 304 ifp->if_baudrate = baudrate; 305 announce = 1; 306 } 307 308 if (announce) { 309 s = splimp(); /* XXX Should be splnet() */ 310 rt_ifmsg(ifp); 311 splx(s); 312 } 313 } 314 315 /* 316 * Initialize generic PHY media based on BMSR, called when a PHY is 317 * attached. We expect to be set up to print a comma-separated list 318 * of media names. Does not print a newline. 319 */ 320 void 321 mii_phy_add_media(sc) 322 struct mii_softc *sc; 323 { 324 struct mii_data *mii = sc->mii_pdata; 325 const char *sep = ""; 326 327 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 328 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 329 330 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) 331 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 332 MII_MEDIA_NONE); 333 334 if (sc->mii_capabilities & BMSR_10THDX) { 335 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst), 336 MII_MEDIA_10_T); 337 #if 0 338 if ((sc->mii_flags & MIIF_NOLOOP) == 0) 339 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_LOOP, 340 sc->mii_inst), MII_MEDIA_10_T); 341 #endif 342 PRINT("10baseT"); 343 } 344 if (sc->mii_capabilities & BMSR_10TFDX) { 345 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst), 346 MII_MEDIA_10_T_FDX); 347 PRINT("10baseT-FDX"); 348 } 349 if (sc->mii_capabilities & BMSR_100TXHDX) { 350 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst), 351 MII_MEDIA_100_TX); 352 #if 0 353 if ((sc->mii_flags & MIIF_NOLOOP) == 0) 354 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, 355 sc->mii_inst), MII_MEDIA_100_TX); 356 #endif 357 PRINT("100baseTX"); 358 } 359 if (sc->mii_capabilities & BMSR_100TXFDX) { 360 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst), 361 MII_MEDIA_100_TX_FDX); 362 PRINT("100baseTX-FDX"); 363 } 364 if (sc->mii_capabilities & BMSR_100T4) { 365 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, sc->mii_inst), 366 MII_MEDIA_100_T4); 367 #if 0 368 if ((sc->mii_flags & MIIF_NOLOOP) == 0) 369 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, IFM_LOOP, 370 sc->mii_inst), MII_MEDIA_100_T4); 371 #endif 372 PRINT("100baseT4"); 373 } 374 if (sc->mii_capabilities & BMSR_ANEG) { 375 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 376 MII_NMEDIA); /* intentionally invalid index */ 377 PRINT("auto"); 378 } 379 #undef ADD 380 #undef PRINT 381 } 382 383 void 384 mii_phy_delete_media(sc) 385 struct mii_softc *sc; 386 { 387 struct mii_data *mii = sc->mii_pdata; 388 389 ifmedia_delete_instance(&mii->mii_media, sc->mii_inst); 390 } 391 392 int 393 mii_phy_activate(self, act) 394 struct device *self; 395 enum devact act; 396 { 397 int rv = 0; 398 399 switch (act) { 400 case DVACT_ACTIVATE: 401 rv = EOPNOTSUPP; 402 break; 403 404 case DVACT_DEACTIVATE: 405 /* Nothing special to do. */ 406 break; 407 } 408 409 return (rv); 410 } 411 412 int 413 mii_phy_detach(self, flags) 414 struct device *self; 415 int flags; 416 { 417 struct mii_softc *sc = (void *) self; 418 419 if (sc->mii_flags & MIIF_DOINGAUTO) 420 callout_stop(&sc->mii_nway_ch); 421 422 mii_phy_delete_media(sc); 423 424 return (0); 425 } 426
Indexes created Mon Sep 29 21:09:56 GMT 2025