nsphy.c revision 1.11
1 /* $NetBSD: nsphy.c,v 1.11 1998/11/04 22:15:40 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 National Semiconductor's DP83840A ethernet 10/100 PHY 71 * Data Sheet available from www.national.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/nsphyreg.h> 89 90 struct nsphy_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 nsphymatch __P((struct device *, struct cfdata *, void *)); 98 void nsphyattach __P((struct device *, struct device *, void *)); 99 100 struct cfattach nsphy_ca = { 101 sizeof(struct nsphy_softc), nsphymatch, nsphyattach 102 }; 103 104 int nsphy_service __P((struct mii_softc *, struct mii_data *, int)); 105 void nsphy_reset __P((struct nsphy_softc *)); 106 void nsphy_auto __P((struct nsphy_softc *)); 107 void nsphy_status __P((struct nsphy_softc *)); 108 109 int 110 nsphymatch(parent, match, aux) 111 struct device *parent; 112 struct cfdata *match; 113 void *aux; 114 { 115 struct mii_attach_args *ma = aux; 116 117 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI && 118 MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) 119 return (1); 120 121 return (0); 122 } 123 124 void 125 nsphyattach(parent, self, aux) 126 struct device *parent, *self; 127 void *aux; 128 { 129 struct nsphy_softc *sc = (struct nsphy_softc *)self; 130 struct mii_attach_args *ma = aux; 131 struct mii_data *mii = ma->mii_data; 132 133 printf(": %s, rev. %d\n", MII_STR_NATSEMI_DP83840, 134 MII_REV(ma->mii_id2)); 135 136 sc->sc_mii.mii_inst = mii->mii_instance; 137 sc->sc_mii.mii_phy = ma->mii_phyno; 138 sc->sc_mii.mii_service = nsphy_service; 139 sc->sc_mii.mii_pdata = mii; 140 141 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 142 143 #if 0 144 /* Can't do this on the i82557! */ 145 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->sc_mii.mii_inst), 146 BMCR_ISO); 147 #endif 148 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->sc_mii.mii_inst), 149 BMCR_LOOP|BMCR_S100); 150 151 nsphy_reset(sc); 152 153 sc->sc_capabilities = PHY_READ(&sc->sc_mii, MII_BMSR) & ma->mii_capmask; 154 printf("%s: ", sc->sc_mii.mii_dev.dv_xname); 155 if ((sc->sc_capabilities & BMSR_MEDIAMASK) == 0) 156 printf("no media present"); 157 else 158 mii_add_media(mii, sc->sc_capabilities, sc->sc_mii.mii_inst); 159 printf("\n"); 160 #undef ADD 161 } 162 163 int 164 nsphy_service(self, mii, cmd) 165 struct mii_softc *self; 166 struct mii_data *mii; 167 int cmd; 168 { 169 struct nsphy_softc *sc = (struct nsphy_softc *)self; 170 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 171 int reg; 172 173 switch (cmd) { 174 case MII_POLLSTAT: 175 /* 176 * If we're not polling our PHY instance, just return. 177 */ 178 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) 179 return (0); 180 break; 181 182 case MII_MEDIACHG: 183 /* 184 * If the media indicates a different PHY instance, 185 * isolate ourselves. 186 */ 187 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) { 188 reg = PHY_READ(&sc->sc_mii, MII_BMCR); 189 PHY_WRITE(&sc->sc_mii, MII_BMCR, reg | BMCR_ISO); 190 return (0); 191 } 192 193 /* 194 * If the interface is not up, don't do anything. 195 */ 196 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 197 break; 198 199 reg = PHY_READ(&sc->sc_mii, MII_NSPHY_PCR); 200 201 /* 202 * Set up the PCR to use LED4 to indicate full-duplex 203 * in both 10baseT and 100baseTX modes. 204 */ 205 reg |= PCR_LED4MODE; 206 207 /* 208 * Make sure Carrier Intgrity Monitor function is 209 * disabled (normal for Node operation, but sometimes 210 * it's not set?!) 211 */ 212 reg |= PCR_CIMDIS; 213 214 /* 215 * Make sure "force link good" is not set. It's only 216 * intended for debugging, but sometimes it's set 217 * after a reset. 218 */ 219 reg &= ~PCR_FLINK100; 220 221 #if 0 222 /* 223 * Mystery bits which are supposedly `reserved', 224 * but we seem to need to set them when the PHY 225 * is connected to some interfaces! 226 */ 227 reg |= 0x0100 | 0x0400; 228 #endif 229 230 PHY_WRITE(&sc->sc_mii, MII_NSPHY_PCR, reg); 231 232 switch (IFM_SUBTYPE(ife->ifm_media)) { 233 case IFM_AUTO: 234 /* 235 * If we're already in auto mode, just return. 236 */ 237 if (PHY_READ(&sc->sc_mii, MII_BMCR) & BMCR_AUTOEN) 238 return (0); 239 nsphy_auto(sc); 240 break; 241 case IFM_100_T4: 242 /* 243 * XXX Not supported as a manual setting right now. 244 */ 245 return (EINVAL); 246 default: 247 /* 248 * BMCR data is stored in the ifmedia entry. 249 */ 250 PHY_WRITE(&sc->sc_mii, MII_ANAR, 251 mii_anar(ife->ifm_media)); 252 PHY_WRITE(&sc->sc_mii, MII_BMCR, ife->ifm_data); 253 } 254 break; 255 256 case MII_TICK: 257 /* 258 * If we're not currently selected, just return. 259 */ 260 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) 261 return (0); 262 263 /* 264 * Only used for autonegotiation. 265 */ 266 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 267 return (0); 268 269 /* 270 * Is the interface even up? 271 */ 272 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 273 return (0); 274 275 /* 276 * Check to see if we have link. If we do, we don't 277 * need to restart the autonegotiation process. Read 278 * the BMSR twice in case it's latched. 279 */ 280 reg = PHY_READ(&sc->sc_mii, MII_BMSR) | 281 PHY_READ(&sc->sc_mii, MII_BMSR); 282 if (reg & BMSR_LINK) 283 return (0); 284 285 /* 286 * Only retry autonegotiation every 5 seconds. 287 */ 288 if (++sc->sc_ticks != 5) 289 return (0); 290 291 sc->sc_ticks = 0; 292 nsphy_reset(sc); 293 nsphy_auto(sc); 294 break; 295 } 296 297 /* Update the media status. */ 298 nsphy_status(sc); 299 300 /* Callback if something changed. */ 301 if (sc->sc_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 302 (*mii->mii_statchg)(sc->sc_mii.mii_dev.dv_parent); 303 sc->sc_active = mii->mii_media_active; 304 } 305 return (0); 306 } 307 308 void 309 nsphy_status(sc) 310 struct nsphy_softc *sc; 311 { 312 struct mii_data *mii = sc->sc_mii.mii_pdata; 313 int bmsr, bmcr, par, anlpar; 314 315 mii->mii_media_status = IFM_AVALID; 316 mii->mii_media_active = IFM_ETHER; 317 318 bmsr = PHY_READ(&sc->sc_mii, MII_BMSR) | 319 PHY_READ(&sc->sc_mii, MII_BMSR); 320 if (bmsr & BMSR_LINK) 321 mii->mii_media_status |= IFM_ACTIVE; 322 323 bmcr = PHY_READ(&sc->sc_mii, MII_BMCR); 324 if (bmcr & BMCR_ISO) { 325 mii->mii_media_active |= IFM_NONE; 326 mii->mii_media_status = 0; 327 return; 328 } 329 330 if (bmcr & BMCR_LOOP) 331 mii->mii_media_active |= IFM_LOOP; 332 333 if (bmcr & BMCR_AUTOEN) { 334 /* 335 * The PAR status bits are only valid of autonegotiation 336 * has completed (or it's disabled). 337 */ 338 if ((bmsr & BMSR_ACOMP) == 0) { 339 /* Erg, still trying, I guess... */ 340 mii->mii_media_active |= IFM_NONE; 341 return; 342 } 343 344 /* 345 * Argh. The PAR doesn't seem to indicate duplex mode 346 * properly! Determine media based on link partner's 347 * advertised capabilities. 348 */ 349 if (PHY_READ(&sc->sc_mii, MII_ANER) & ANER_LPAN) { 350 anlpar = PHY_READ(&sc->sc_mii, MII_ANAR) & 351 PHY_READ(&sc->sc_mii, MII_ANLPAR); 352 if (anlpar & ANLPAR_T4) 353 mii->mii_media_active |= IFM_100_T4; 354 else if (anlpar & ANLPAR_TX_FD) 355 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 356 else if (anlpar & ANLPAR_TX) 357 mii->mii_media_active |= IFM_100_TX; 358 else if (anlpar & ANLPAR_10_FD) 359 mii->mii_media_active |= IFM_10_T|IFM_FDX; 360 else if (anlpar & ANLPAR_10) 361 mii->mii_media_active |= IFM_10_T; 362 else 363 mii->mii_media_active |= IFM_NONE; 364 return; 365 } 366 367 /* 368 * Link partner is not capable of autonegotiation. 369 * We will never be in full-duplex mode if this is 370 * the case, so reading the PAR is OK. 371 */ 372 par = PHY_READ(&sc->sc_mii, MII_NSPHY_PAR); 373 if (par & PAR_10) 374 mii->mii_media_active |= IFM_10_T; 375 else 376 mii->mii_media_active |= IFM_100_TX; 377 #if 0 378 if (par & PAR_FDX) 379 mii->mii_media_active |= IFM_FDX; 380 #endif 381 } else { 382 if (bmcr & BMCR_S100) 383 mii->mii_media_active |= IFM_100_TX; 384 else 385 mii->mii_media_active |= IFM_10_T; 386 if (bmcr & BMCR_FDX) 387 mii->mii_media_active |= IFM_FDX; 388 } 389 } 390 391 void 392 nsphy_auto(sc) 393 struct nsphy_softc *sc; 394 { 395 int bmsr, i; 396 397 PHY_WRITE(&sc->sc_mii, MII_ANAR, 398 BMSR_MEDIA_TO_ANAR(sc->sc_capabilities) | ANAR_CSMA); 399 PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 400 401 /* Wait 500ms for it to complete. */ 402 for (i = 0; i < 500; i++) { 403 if ((bmsr = PHY_READ(&sc->sc_mii, MII_BMSR)) & BMSR_ACOMP) 404 return; 405 delay(1000); 406 } 407 #if 0 408 if ((bmsr & BMSR_ACOMP) == 0) 409 printf("%s: autonegotiation failed to complete\n", 410 sc->sc_mii.mii_dev.dv_xname); 411 #endif 412 } 413 414 void 415 nsphy_reset(sc) 416 struct nsphy_softc *sc; 417 { 418 int reg, i; 419 420 /* 421 * The i82557 wedges if we isolate all of its PHYs! 422 */ 423 if (sc->sc_mii.mii_inst == 0) 424 PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_RESET); 425 else 426 PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_RESET|BMCR_ISO); 427 428 /* Wait 100ms for it to complete. */ 429 for (i = 0; i < 100; i++) { 430 reg = PHY_READ(&sc->sc_mii, MII_BMCR); 431 if ((reg & BMCR_RESET) == 0) 432 break; 433 delay(1000); 434 } 435 436 /* Make sure the PHY is isolated. */ 437 if (sc->sc_mii.mii_inst != 0) 438 PHY_WRITE(&sc->sc_mii, MII_BMCR, reg | BMCR_ISO); 439 } 440
Indexes created Wed Oct 22 13:09:56 GMT 2025