nsphy.c revision 1.10
1 /* $NetBSD: nsphy.c,v 1.10 1998/11/02 22:31:37 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 #define NSPHY_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 NSPHY_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 nsphy_service __P((struct mii_softc *, struct mii_data *, int)); 113 void nsphy_reset __P((struct nsphy_softc *)); 114 void nsphy_auto __P((struct nsphy_softc *)); 115 void nsphy_status __P((struct nsphy_softc *)); 116 117 int 118 nsphymatch(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_NATSEMI && 126 MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) 127 return (1); 128 129 return (0); 130 } 131 132 void 133 nsphyattach(parent, self, aux) 134 struct device *parent, *self; 135 void *aux; 136 { 137 struct nsphy_softc *sc = (struct nsphy_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_NATSEMI_DP83840, 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 = nsphy_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 nsphy_reset(sc); 160 161 sc->sc_capabilities = NSPHY_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 nsphy_service(self, mii, cmd) 173 struct mii_softc *self; 174 struct mii_data *mii; 175 int cmd; 176 { 177 struct nsphy_softc *sc = (struct nsphy_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 = NSPHY_READ(sc, MII_BMCR); 197 NSPHY_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 reg = NSPHY_READ(sc, MII_NSPHY_PCR); 208 209 /* 210 * Set up the PCR to use LED4 to indicate full-duplex 211 * in both 10baseT and 100baseTX modes. 212 */ 213 reg |= PCR_LED4MODE; 214 215 /* 216 * Make sure Carrier Intgrity Monitor function is 217 * disabled (normal for Node operation, but sometimes 218 * it's not set?!) 219 */ 220 reg |= PCR_CIMDIS; 221 222 /* 223 * Make sure "force link good" is not set. It's only 224 * intended for debugging, but sometimes it's set 225 * after a reset. 226 */ 227 reg &= ~PCR_FLINK100; 228 229 #if 0 230 /* 231 * Mystery bits which are supposedly `reserved', 232 * but we seem to need to set them when the PHY 233 * is connected to some interfaces! 234 */ 235 reg |= 0x0100 | 0x0400; 236 #endif 237 238 NSPHY_WRITE(sc, MII_NSPHY_PCR, reg); 239 240 switch (IFM_SUBTYPE(ife->ifm_media)) { 241 case IFM_AUTO: 242 /* 243 * If we're already in auto mode, just return. 244 */ 245 if (NSPHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 246 return (0); 247 nsphy_auto(sc); 248 break; 249 case IFM_100_T4: 250 /* 251 * XXX Not supported as a manual setting right now. 252 */ 253 return (EINVAL); 254 default: 255 /* 256 * BMCR data is stored in the ifmedia entry. 257 */ 258 NSPHY_WRITE(sc, MII_ANAR, mii_anar(ife->ifm_media)); 259 NSPHY_WRITE(sc, MII_BMCR, ife->ifm_data); 260 } 261 break; 262 263 case MII_TICK: 264 /* 265 * If we're not currently selected, just return. 266 */ 267 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) 268 return (0); 269 270 /* 271 * Only used for autonegotiation. 272 */ 273 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 274 return (0); 275 276 /* 277 * Is the interface even up? 278 */ 279 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 280 return (0); 281 282 /* 283 * Check to see if we have link. If we do, we don't 284 * need to restart the autonegotiation process. Read 285 * the BMSR twice in case it's latched. 286 */ 287 reg = NSPHY_READ(sc, MII_BMSR) | NSPHY_READ(sc, MII_BMSR); 288 if (reg & BMSR_LINK) 289 return (0); 290 291 /* 292 * Only retry autonegotiation every 5 seconds. 293 */ 294 if (++sc->sc_ticks != 5) 295 return (0); 296 297 sc->sc_ticks = 0; 298 nsphy_reset(sc); 299 nsphy_auto(sc); 300 break; 301 } 302 303 /* Update the media status. */ 304 nsphy_status(sc); 305 306 /* Callback if something changed. */ 307 if (sc->sc_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 308 (*mii->mii_statchg)(sc->sc_mii.mii_dev.dv_parent); 309 sc->sc_active = mii->mii_media_active; 310 } 311 return (0); 312 } 313 314 void 315 nsphy_status(sc) 316 struct nsphy_softc *sc; 317 { 318 struct mii_data *mii = sc->sc_mii.mii_pdata; 319 int bmsr, bmcr, par, anlpar; 320 321 mii->mii_media_status = IFM_AVALID; 322 mii->mii_media_active = IFM_ETHER; 323 324 bmsr = NSPHY_READ(sc, MII_BMSR) | NSPHY_READ(sc, MII_BMSR); 325 if (bmsr & BMSR_LINK) 326 mii->mii_media_status |= IFM_ACTIVE; 327 328 bmcr = NSPHY_READ(sc, MII_BMCR); 329 if (bmcr & BMCR_ISO) { 330 mii->mii_media_active |= IFM_NONE; 331 mii->mii_media_status = 0; 332 return; 333 } 334 335 if (bmcr & BMCR_LOOP) 336 mii->mii_media_active |= IFM_LOOP; 337 338 if (bmcr & BMCR_AUTOEN) { 339 /* 340 * The PAR status bits are only valid of autonegotiation 341 * has completed (or it's disabled). 342 */ 343 if ((bmsr & BMSR_ACOMP) == 0) { 344 /* Erg, still trying, I guess... */ 345 mii->mii_media_active |= IFM_NONE; 346 return; 347 } 348 349 /* 350 * Argh. The PAR doesn't seem to indicate duplex mode 351 * properly! Determine media based on link partner's 352 * advertised capabilities. 353 */ 354 if (NSPHY_READ(sc, MII_ANER) & ANER_LPAN) { 355 anlpar = NSPHY_READ(sc, MII_ANAR) & 356 NSPHY_READ(sc, MII_ANLPAR); 357 if (anlpar & ANLPAR_T4) 358 mii->mii_media_active |= IFM_100_T4; 359 else if (anlpar & ANLPAR_TX_FD) 360 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 361 else if (anlpar & ANLPAR_TX) 362 mii->mii_media_active |= IFM_100_TX; 363 else if (anlpar & ANLPAR_10_FD) 364 mii->mii_media_active |= IFM_10_T|IFM_FDX; 365 else if (anlpar & ANLPAR_10) 366 mii->mii_media_active |= IFM_10_T; 367 else 368 mii->mii_media_active |= IFM_NONE; 369 return; 370 } 371 372 /* 373 * Link partner is not capable of autonegotiation. 374 * We will never be in full-duplex mode if this is 375 * the case, so reading the PAR is OK. 376 */ 377 par = NSPHY_READ(sc, MII_NSPHY_PAR); 378 if (par & PAR_10) 379 mii->mii_media_active |= IFM_10_T; 380 else 381 mii->mii_media_active |= IFM_100_TX; 382 #if 0 383 if (par & PAR_FDX) 384 mii->mii_media_active |= IFM_FDX; 385 #endif 386 } else { 387 if (bmcr & BMCR_S100) 388 mii->mii_media_active |= IFM_100_TX; 389 else 390 mii->mii_media_active |= IFM_10_T; 391 if (bmcr & BMCR_FDX) 392 mii->mii_media_active |= IFM_FDX; 393 } 394 } 395 396 void 397 nsphy_auto(sc) 398 struct nsphy_softc *sc; 399 { 400 int bmsr, i; 401 402 NSPHY_WRITE(sc, MII_ANAR, 403 BMSR_MEDIA_TO_ANAR(sc->sc_capabilities) | ANAR_CSMA); 404 NSPHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 405 406 /* Wait 500ms for it to complete. */ 407 for (i = 0; i < 500; i++) { 408 if ((bmsr = NSPHY_READ(sc, MII_BMSR)) & BMSR_ACOMP) 409 return; 410 delay(1000); 411 } 412 #if 0 413 if ((bmsr & BMSR_ACOMP) == 0) 414 printf("%s: autonegotiation failed to complete\n", 415 sc->sc_mii.mii_dev.dv_xname); 416 #endif 417 } 418 419 void 420 nsphy_reset(sc) 421 struct nsphy_softc *sc; 422 { 423 int reg, i; 424 425 /* 426 * The i82557 wedges if we isolate all of its PHYs! 427 */ 428 if (sc->sc_mii.mii_inst == 0) 429 NSPHY_WRITE(sc, MII_BMCR, BMCR_RESET); 430 else 431 NSPHY_WRITE(sc, MII_BMCR, BMCR_RESET|BMCR_ISO); 432 433 /* Wait 100ms for it to complete. */ 434 for (i = 0; i < 100; i++) { 435 reg = NSPHY_READ(sc, MII_BMCR); 436 if ((reg & BMCR_RESET) == 0) 437 break; 438 delay(1000); 439 } 440 441 /* Make sure the PHY is isolated. */ 442 if (sc->sc_mii.mii_inst != 0) 443 NSPHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 444 } 445
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