nsphy.c revision 1.7
1/* $OpenBSD: nsphy.c,v 1.7 1999/12/07 22:01:32 jason Exp $ */ 2/* $NetBSD: nsphy.c,v 1.18 1999/07/14 23:57:36 thorpej Exp $ */ 3 4/*- 5 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 10 * NASA Ames Research Center. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the NetBSD 23 * Foundation, Inc. and its contributors. 24 * 4. Neither the name of The NetBSD Foundation nor the names of its 25 * contributors may be used to endorse or promote products derived 26 * from this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 */ 40 41/* 42 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by Manuel Bouyer. 55 * 4. The name of the author may not be used to endorse or promote products 56 * derived from this software without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 61 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 62 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 63 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 64 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 65 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 66 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 67 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 68 */ 69 70/* 71 * driver for National Semiconductor's DP83840A ethernet 10/100 PHY 72 * Data Sheet available from www.national.com 73 */ 74 75#include <sys/param.h> 76#include <sys/systm.h> 77#include <sys/kernel.h> 78#include <sys/device.h> 79#include <sys/malloc.h> 80#include <sys/socket.h> 81#include <sys/errno.h> 82 83#include <net/if.h> 84#include <net/if_media.h> 85 86#include <dev/mii/mii.h> 87#include <dev/mii/miivar.h> 88#include <dev/mii/miidevs.h> 89 90#include <dev/mii/nsphyreg.h> 91 92int nsphymatch __P((struct device *, void *, void *)); 93void nsphyattach __P((struct device *, struct device *, void *)); 94 95struct cfattach nsphy_ca = { 96 sizeof(struct mii_softc), nsphymatch, nsphyattach 97}; 98 99struct cfdriver nsphy_cd = { 100 NULL, "nsphy", DV_DULL 101}; 102 103int nsphy_service __P((struct mii_softc *, struct mii_data *, int)); 104void nsphy_status __P((struct mii_softc *)); 105void nsphy_reset __P((struct mii_softc *)); 106 107int 108nsphymatch(parent, match, aux) 109 struct device *parent; 110 void *match; 111 void *aux; 112{ 113 struct mii_attach_args *ma = aux; 114 115 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI && 116 MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) 117 return (10); 118 119 return (0); 120} 121 122void 123nsphyattach(parent, self, aux) 124 struct device *parent; 125 struct device *self; 126 void *aux; 127{ 128 struct mii_softc *sc = (struct mii_softc *)self; 129 struct mii_attach_args *ma = aux; 130 struct mii_data *mii = ma->mii_data; 131 132 printf(": %s, rev. %d\n", MII_STR_NATSEMI_DP83840, 133 MII_REV(ma->mii_id2)); 134 135 sc->mii_inst = mii->mii_instance; 136 sc->mii_phy = ma->mii_phyno; 137 sc->mii_service = nsphy_service; 138 sc->mii_pdata = mii; 139 140 /* 141 * i82557 wedges if all of its PHYs are isolated! 142 */ 143 if (strcmp(parent->dv_cfdata->cf_driver->cd_name, "fxp") == 0 && 144 mii->mii_instance == 0) 145 sc->mii_flags |= MIIF_NOISOLATE; 146 147 nsphy_reset(sc); 148 149 sc->mii_capabilities = 150 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 151 if (sc->mii_capabilities & BMSR_MEDIAMASK) 152 mii_add_media(sc); 153} 154 155int 156nsphy_service(sc, mii, cmd) 157 struct mii_softc *sc; 158 struct mii_data *mii; 159 int cmd; 160{ 161 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 162 int reg; 163 164 switch (cmd) { 165 case MII_POLLSTAT: 166 /* 167 * If we're not polling our PHY instance, just return. 168 */ 169 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 170 return (0); 171 break; 172 173 case MII_MEDIACHG: 174 /* 175 * If the media indicates a different PHY instance, 176 * isolate ourselves. 177 */ 178 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 179 reg = PHY_READ(sc, MII_BMCR); 180 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 181 return (0); 182 } 183 184 /* 185 * If the interface is not up, don't do anything. 186 */ 187 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 188 break; 189 190 reg = PHY_READ(sc, MII_NSPHY_PCR); 191 192 /* 193 * Set up the PCR to use LED4 to indicate full-duplex 194 * in both 10baseT and 100baseTX modes. 195 */ 196 reg |= PCR_LED4MODE; 197 198 /* 199 * Make sure Carrier Intgrity Monitor function is 200 * disabled (normal for Node operation, but sometimes 201 * it's not set?!) 202 */ 203 reg |= PCR_CIMDIS; 204 205 /* 206 * Make sure "force link good" is set to normal mode. 207 * It's only intended for debugging. 208 */ 209 reg |= PCR_FLINK100; 210 211#if 0 212 /* 213 * Mystery bits which are supposedly `reserved', 214 * but we seem to need to set them when the PHY 215 * is connected to some interfaces! 216 */ 217 reg |= 0x0100 | 0x0400; 218#endif 219 220 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 221 222 switch (IFM_SUBTYPE(ife->ifm_media)) { 223 case IFM_AUTO: 224 nsphy_reset(sc); 225 /* 226 * If we're already in auto mode, just return. 227 */ 228 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 229 return (0); 230 (void) mii_phy_auto(sc, 1); 231 break; 232 default: 233 mii_phy_setmedia(sc); 234 } 235 break; 236 237 case MII_TICK: 238 /* 239 * If we're not currently selected, just return. 240 */ 241 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 242 return (0); 243 244 /* 245 * Only used for autonegotiation. 246 */ 247 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 248 return (0); 249 250 /* 251 * Is the interface even up? 252 */ 253 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 254 return (0); 255 256 /* 257 * Check to see if we have link. If we do, we don't 258 * need to restart the autonegotiation process. Read 259 * the BMSR twice in case it's latched. 260 */ 261 reg = PHY_READ(sc, MII_BMSR) | 262 PHY_READ(sc, MII_BMSR); 263 if (reg & BMSR_LINK) 264 return (0); 265 266 /* 267 * Only retry autonegotiation every 5 seconds. 268 */ 269 if (++sc->mii_ticks != 5) 270 return (0); 271 272 sc->mii_ticks = 0; 273 nsphy_reset(sc); 274 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 275 return (0); 276 break; 277 278 case MII_DOWN: 279 mii_phy_down(sc); 280 return (0); 281 } 282 283 /* Update the media status. */ 284 nsphy_status(sc); 285 286 /* Callback if something changed. */ 287 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 288 (*mii->mii_statchg)(sc->mii_dev.dv_parent); 289 sc->mii_active = mii->mii_media_active; 290 } 291 return (0); 292} 293 294void 295nsphy_status(sc) 296 struct mii_softc *sc; 297{ 298 struct mii_data *mii = sc->mii_pdata; 299 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 300 int bmsr, bmcr, par, anlpar; 301 302 mii->mii_media_status = IFM_AVALID; 303 mii->mii_media_active = IFM_ETHER; 304 305 bmsr = PHY_READ(sc, MII_BMSR) | 306 PHY_READ(sc, MII_BMSR); 307 if (bmsr & BMSR_LINK) 308 mii->mii_media_status |= IFM_ACTIVE; 309 310 bmcr = PHY_READ(sc, MII_BMCR); 311 if (bmcr & BMCR_ISO) { 312 mii->mii_media_active |= IFM_NONE; 313 mii->mii_media_status = 0; 314 return; 315 } 316 317 if (bmcr & BMCR_LOOP) 318 mii->mii_media_active |= IFM_LOOP; 319 320 if (bmcr & BMCR_AUTOEN) { 321 /* 322 * The PAR status bits are only valid of autonegotiation 323 * has completed (or it's disabled). 324 */ 325 if ((bmsr & BMSR_ACOMP) == 0) { 326 /* Erg, still trying, I guess... */ 327 mii->mii_media_active |= IFM_NONE; 328 return; 329 } 330 331 /* 332 * Argh. The PAR doesn't seem to indicate duplex mode 333 * properly! Determine media based on link partner's 334 * advertised capabilities. 335 */ 336 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 337 anlpar = PHY_READ(sc, MII_ANAR) & 338 PHY_READ(sc, MII_ANLPAR); 339 if (anlpar & ANLPAR_T4) 340 mii->mii_media_active |= IFM_100_T4; 341 else if (anlpar & ANLPAR_TX_FD) 342 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 343 else if (anlpar & ANLPAR_TX) 344 mii->mii_media_active |= IFM_100_TX; 345 else if (anlpar & ANLPAR_10_FD) 346 mii->mii_media_active |= IFM_10_T|IFM_FDX; 347 else if (anlpar & ANLPAR_10) 348 mii->mii_media_active |= IFM_10_T; 349 else 350 mii->mii_media_active |= IFM_NONE; 351 return; 352 } 353 354 /* 355 * Link partner is not capable of autonegotiation. 356 * We will never be in full-duplex mode if this is 357 * the case, so reading the PAR is OK. 358 */ 359 par = PHY_READ(sc, MII_NSPHY_PAR); 360 if (par & PAR_10) 361 mii->mii_media_active |= IFM_10_T; 362 else 363 mii->mii_media_active |= IFM_100_TX; 364#if 0 365 if (par & PAR_FDX) 366 mii->mii_media_active |= IFM_FDX; 367#endif 368 } else 369 mii->mii_media_active = ife->ifm_media; 370} 371 372void 373nsphy_reset(sc) 374 struct mii_softc *sc; 375{ 376 int anar; 377 378 mii_phy_reset(sc); 379 anar = PHY_READ(sc, MII_ANAR); 380 anar |= BMSR_MEDIA_TO_ANAR(PHY_READ(sc, MII_BMSR)); 381 PHY_WRITE(sc, MII_ANAR, anar); 382} 383