inphy.c revision 1.4
1 /* $NetBSD: inphy.c,v 1.4 1998/11/02 22:31:36 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 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 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by Manuel Bouyer. 54 * 4. The name of the author may not be used to endorse or promote products 55 * derived from this software without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 58 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 59 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 60 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 61 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 62 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 63 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 64 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 65 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 66 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 /* 70 * driver for Intel's i82555 ethernet 10/100 PHY 71 * Data Sheet available from www.intel.com 72 */ 73 74 #include <sys/param.h> 75 #include <sys/systm.h> 76 #include <sys/kernel.h> 77 #include <sys/device.h> 78 #include <sys/malloc.h> 79 #include <sys/socket.h> 80 81 #include <net/if.h> 82 #include <net/if_media.h> 83 84 #include <dev/mii/mii.h> 85 #include <dev/mii/miivar.h> 86 #include <dev/mii/miidevs.h> 87 88 #include <dev/mii/inphyreg.h> 89 90 struct inphy_softc { 91 struct mii_softc sc_mii; /* generic PHY */ 92 int sc_capabilities; 93 int sc_ticks; 94 int sc_active; 95 }; 96 97 int inphymatch __P((struct device *, struct cfdata *, void *)); 98 void inphyattach __P((struct device *, struct device *, void *)); 99 100 struct cfattach inphy_ca = { 101 sizeof(struct inphy_softc), inphymatch, inphyattach 102 }; 103 104 #define INPHY_READ(sc, reg) \ 105 (*(sc)->sc_mii.mii_pdata->mii_readreg)((sc)->sc_mii.mii_dev.dv_parent, \ 106 (sc)->sc_mii.mii_phy, (reg)) 107 108 #define INPHY_WRITE(sc, reg, val) \ 109 (*(sc)->sc_mii.mii_pdata->mii_writereg)((sc)->sc_mii.mii_dev.dv_parent, \ 110 (sc)->sc_mii.mii_phy, (reg), (val)) 111 112 int inphy_service __P((struct mii_softc *, struct mii_data *, int)); 113 void inphy_reset __P((struct inphy_softc *)); 114 void inphy_auto __P((struct inphy_softc *)); 115 void inphy_status __P((struct inphy_softc *)); 116 117 int 118 inphymatch(parent, match, aux) 119 struct device *parent; 120 struct cfdata *match; 121 void *aux; 122 { 123 struct mii_attach_args *ma = aux; 124 125 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_INTEL && 126 MII_MODEL(ma->mii_id2) == MII_MODEL_INTEL_I82555) 127 return (1); 128 129 return (0); 130 } 131 132 void 133 inphyattach(parent, self, aux) 134 struct device *parent, *self; 135 void *aux; 136 { 137 struct inphy_softc *sc = (struct inphy_softc *)self; 138 struct mii_attach_args *ma = aux; 139 struct mii_data *mii = ma->mii_data; 140 141 printf(": %s, rev. %d\n", MII_STR_INTEL_I82555, 142 MII_REV(ma->mii_id2)); 143 144 sc->sc_mii.mii_inst = mii->mii_instance; 145 sc->sc_mii.mii_phy = ma->mii_phyno; 146 sc->sc_mii.mii_service = inphy_service; 147 sc->sc_mii.mii_pdata = mii; 148 149 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 150 151 #if 0 152 /* Can't do this on the i82557! */ 153 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->sc_mii.mii_inst), 154 BMCR_ISO); 155 #endif 156 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->sc_mii.mii_inst), 157 BMCR_LOOP|BMCR_S100); 158 159 inphy_reset(sc); 160 161 sc->sc_capabilities = INPHY_READ(sc, MII_BMSR) & ma->mii_capmask; 162 printf("%s: ", sc->sc_mii.mii_dev.dv_xname); 163 if ((sc->sc_capabilities & BMSR_MEDIAMASK) == 0) 164 printf("no media present"); 165 else 166 mii_add_media(mii, sc->sc_capabilities, sc->sc_mii.mii_inst); 167 printf("\n"); 168 #undef ADD 169 } 170 171 int 172 inphy_service(self, mii, cmd) 173 struct mii_softc *self; 174 struct mii_data *mii; 175 int cmd; 176 { 177 struct inphy_softc *sc = (struct inphy_softc *)self; 178 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 179 int reg; 180 181 switch (cmd) { 182 case MII_POLLSTAT: 183 /* 184 * If we're not polling our PHY instance, just return. 185 */ 186 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) 187 return (0); 188 break; 189 190 case MII_MEDIACHG: 191 /* 192 * If the media indicates a different PHY instance, 193 * isolate ourselves. 194 */ 195 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) { 196 reg = INPHY_READ(sc, MII_BMCR); 197 INPHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 198 return (0); 199 } 200 201 /* 202 * If the interface is not up, don't do anything. 203 */ 204 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 205 break; 206 207 switch (IFM_SUBTYPE(ife->ifm_media)) { 208 case IFM_AUTO: 209 /* 210 * If we're already in auto mode, just return. 211 */ 212 if (INPHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 213 return (0); 214 inphy_auto(sc); 215 break; 216 case IFM_100_T4: 217 /* 218 * XXX Not supported as a manual setting right now. 219 */ 220 return (EINVAL); 221 default: 222 /* 223 * BMCR data is stored in the ifmedia entry. 224 */ 225 INPHY_WRITE(sc, MII_ANAR, mii_anar(ife->ifm_media)); 226 INPHY_WRITE(sc, MII_BMCR, ife->ifm_data); 227 } 228 break; 229 230 case MII_TICK: 231 /* 232 * If we're not currently selected, just return. 233 */ 234 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) 235 return (0); 236 237 /* 238 * Only used for autonegotiation. 239 */ 240 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 241 return (0); 242 243 /* 244 * Is the interface even up? 245 */ 246 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 247 return (0); 248 249 /* 250 * Check to see if we have link. If we do, we don't 251 * need to restart the autonegotiation process. Read 252 * the BMSR twice in case it's latched. 253 */ 254 reg = INPHY_READ(sc, MII_BMSR) | INPHY_READ(sc, MII_BMSR); 255 if (reg & BMSR_LINK) 256 return (0); 257 258 /* 259 * Only retry autonegotiation every 5 seconds. 260 */ 261 if (++sc->sc_ticks != 5) 262 return (0); 263 264 sc->sc_ticks = 0; 265 inphy_reset(sc); 266 inphy_auto(sc); 267 break; 268 } 269 270 /* Update the media status. */ 271 inphy_status(sc); 272 273 /* Callback if something changed. */ 274 if (sc->sc_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 275 (*mii->mii_statchg)(sc->sc_mii.mii_dev.dv_parent); 276 sc->sc_active = mii->mii_media_active; 277 } 278 return (0); 279 } 280 281 void 282 inphy_status(sc) 283 struct inphy_softc *sc; 284 { 285 struct mii_data *mii = sc->sc_mii.mii_pdata; 286 int bmsr, bmcr, scr; 287 288 mii->mii_media_status = IFM_AVALID; 289 mii->mii_media_active = IFM_ETHER; 290 291 bmsr = INPHY_READ(sc, MII_BMSR) | INPHY_READ(sc, MII_BMSR); 292 if (bmsr & BMSR_LINK) 293 mii->mii_media_status |= IFM_ACTIVE; 294 295 bmcr = INPHY_READ(sc, MII_BMCR); 296 if (bmcr & BMCR_ISO) { 297 mii->mii_media_active |= IFM_NONE; 298 mii->mii_media_status = 0; 299 return; 300 } 301 302 if (bmcr & BMCR_LOOP) 303 mii->mii_media_active |= IFM_LOOP; 304 305 if (bmcr & BMCR_AUTOEN) { 306 if ((bmsr & BMSR_ACOMP) == 0) { 307 /* Erg, still trying, I guess... */ 308 mii->mii_media_active |= IFM_NONE; 309 return; 310 } 311 scr = INPHY_READ(sc, MII_INPHY_SCR); 312 if (scr & SCR_T4) 313 mii->mii_media_active |= IFM_100_T4; 314 else if (scr & SCR_S100) 315 mii->mii_media_active |= IFM_100_TX; 316 else 317 mii->mii_media_active |= IFM_10_T; 318 if (scr & SCR_FDX) 319 mii->mii_media_active |= IFM_FDX; 320 } else { 321 if (bmcr & BMCR_S100) 322 mii->mii_media_active |= IFM_100_TX; 323 else 324 mii->mii_media_active |= IFM_10_T; 325 if (bmcr & BMCR_FDX) 326 mii->mii_media_active |= IFM_FDX; 327 } 328 } 329 330 void 331 inphy_auto(sc) 332 struct inphy_softc *sc; 333 { 334 int bmsr, i; 335 336 INPHY_WRITE(sc, MII_ANAR, 337 BMSR_MEDIA_TO_ANAR(sc->sc_capabilities) | ANAR_CSMA); 338 INPHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 339 340 /* Wait 500ms for it to complete. */ 341 for (i = 0; i < 500; i++) { 342 if ((bmsr = INPHY_READ(sc, MII_BMSR)) & BMSR_ACOMP) 343 return; 344 delay(1000); 345 } 346 #if 0 347 if ((bmsr & BMSR_ACOMP) == 0) 348 printf("%s: autonegotiation failed to complete\n", 349 sc->sc_mii.mii_dev.dv_xname); 350 #endif 351 } 352 353 void 354 inphy_reset(sc) 355 struct inphy_softc *sc; 356 { 357 int reg, i; 358 359 /* 360 * The i82557 wedges if we isolate all of its PHYs! 361 */ 362 if (sc->sc_mii.mii_inst == 0) 363 INPHY_WRITE(sc, MII_BMCR, BMCR_RESET); 364 else 365 INPHY_WRITE(sc, MII_BMCR, BMCR_RESET|BMCR_ISO); 366 367 /* Wait 100ms for it to complete. */ 368 for (i = 0; i < 100; i++) { 369 reg = INPHY_READ(sc, MII_BMCR); 370 if ((reg & BMCR_RESET) == 0) 371 break; 372 delay(1000); 373 } 374 375 /* Make sure the PHY is isolated. */ 376 if (sc->sc_mii.mii_inst != 0) 377 INPHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 378 } 379
Indexes created Tue Sep 23 14:10:03 GMT 2025