nsphy.c revision 1.16
1 /* $NetBSD: nsphy.c,v 1.16 1998/11/05 04:08:02 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 int nsphymatch __P((struct device *, struct cfdata *, void *)); 91 void nsphyattach __P((struct device *, struct device *, void *)); 92 93 struct cfattach nsphy_ca = { 94 sizeof(struct mii_softc), nsphymatch, nsphyattach 95 }; 96 97 int nsphy_service __P((struct mii_softc *, struct mii_data *, int)); 98 void nsphy_status __P((struct mii_softc *)); 99 100 int 101 nsphymatch(parent, match, aux) 102 struct device *parent; 103 struct cfdata *match; 104 void *aux; 105 { 106 struct mii_attach_args *ma = aux; 107 108 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI && 109 MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) 110 return (10); 111 112 return (0); 113 } 114 115 void 116 nsphyattach(parent, self, aux) 117 struct device *parent, *self; 118 void *aux; 119 { 120 struct mii_softc *sc = (struct mii_softc *)self; 121 struct mii_attach_args *ma = aux; 122 struct mii_data *mii = ma->mii_data; 123 124 printf(": %s, rev. %d\n", MII_STR_NATSEMI_DP83840, 125 MII_REV(ma->mii_id2)); 126 127 sc->mii_inst = mii->mii_instance; 128 sc->mii_phy = ma->mii_phyno; 129 sc->mii_service = nsphy_service; 130 sc->mii_pdata = mii; 131 132 /* 133 * i82557 wedges if all of its PHYs are isolated! 134 */ 135 if (strcmp(parent->dv_cfdata->cf_driver->cd_name, "fxp") == 0 && 136 mii->mii_instance == 0) 137 sc->mii_flags |= MIIF_NOISOLATE; 138 139 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 140 141 #if 0 142 /* Can't do this on the i82557! */ 143 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 144 BMCR_ISO); 145 #endif 146 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 147 BMCR_LOOP|BMCR_S100); 148 149 mii_phy_reset(sc); 150 151 sc->mii_capabilities = 152 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 153 printf("%s: ", sc->mii_dev.dv_xname); 154 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 155 printf("no media present"); 156 else 157 mii_add_media(mii, sc->mii_capabilities, 158 sc->mii_inst); 159 printf("\n"); 160 #undef ADD 161 } 162 163 int 164 nsphy_service(sc, mii, cmd) 165 struct mii_softc *sc; 166 struct mii_data *mii; 167 int cmd; 168 { 169 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 170 int reg; 171 172 switch (cmd) { 173 case MII_POLLSTAT: 174 /* 175 * If we're not polling our PHY instance, just return. 176 */ 177 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 178 return (0); 179 break; 180 181 case MII_MEDIACHG: 182 /* 183 * If the media indicates a different PHY instance, 184 * isolate ourselves. 185 */ 186 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 187 reg = PHY_READ(sc, MII_BMCR); 188 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 189 return (0); 190 } 191 192 /* 193 * If the interface is not up, don't do anything. 194 */ 195 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 196 break; 197 198 reg = PHY_READ(sc, MII_NSPHY_PCR); 199 200 /* 201 * Set up the PCR to use LED4 to indicate full-duplex 202 * in both 10baseT and 100baseTX modes. 203 */ 204 reg |= PCR_LED4MODE; 205 206 /* 207 * Make sure Carrier Intgrity Monitor function is 208 * disabled (normal for Node operation, but sometimes 209 * it's not set?!) 210 */ 211 reg |= PCR_CIMDIS; 212 213 /* 214 * Make sure "force link good" is not set. It's only 215 * intended for debugging, but sometimes it's set 216 * after a reset. 217 */ 218 reg &= ~PCR_FLINK100; 219 220 #if 0 221 /* 222 * Mystery bits which are supposedly `reserved', 223 * but we seem to need to set them when the PHY 224 * is connected to some interfaces! 225 */ 226 reg |= 0x0100 | 0x0400; 227 #endif 228 229 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 230 231 switch (IFM_SUBTYPE(ife->ifm_media)) { 232 case IFM_AUTO: 233 /* 234 * If we're already in auto mode, just return. 235 */ 236 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 237 return (0); 238 (void) mii_phy_auto(sc); 239 break; 240 case IFM_100_T4: 241 /* 242 * XXX Not supported as a manual setting right now. 243 */ 244 return (EINVAL); 245 default: 246 /* 247 * BMCR data is stored in the ifmedia entry. 248 */ 249 PHY_WRITE(sc, MII_ANAR, 250 mii_anar(ife->ifm_media)); 251 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 252 } 253 break; 254 255 case MII_TICK: 256 /* 257 * If we're not currently selected, just return. 258 */ 259 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 260 return (0); 261 262 /* 263 * Only used for autonegotiation. 264 */ 265 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 266 return (0); 267 268 /* 269 * Is the interface even up? 270 */ 271 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 272 return (0); 273 274 /* 275 * Check to see if we have link. If we do, we don't 276 * need to restart the autonegotiation process. Read 277 * the BMSR twice in case it's latched. 278 */ 279 reg = PHY_READ(sc, MII_BMSR) | 280 PHY_READ(sc, MII_BMSR); 281 if (reg & BMSR_LINK) 282 return (0); 283 284 /* 285 * Only retry autonegotiation every 5 seconds. 286 */ 287 if (++sc->mii_ticks != 5) 288 return (0); 289 290 sc->mii_ticks = 0; 291 mii_phy_reset(sc); 292 (void) mii_phy_auto(sc); 293 break; 294 } 295 296 /* Update the media status. */ 297 nsphy_status(sc); 298 299 /* Callback if something changed. */ 300 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 301 (*mii->mii_statchg)(sc->mii_dev.dv_parent); 302 sc->mii_active = mii->mii_media_active; 303 } 304 return (0); 305 } 306 307 void 308 nsphy_status(sc) 309 struct mii_softc *sc; 310 { 311 struct mii_data *mii = sc->mii_pdata; 312 int bmsr, bmcr, par, anlpar; 313 314 mii->mii_media_status = IFM_AVALID; 315 mii->mii_media_active = IFM_ETHER; 316 317 bmsr = PHY_READ(sc, MII_BMSR) | 318 PHY_READ(sc, MII_BMSR); 319 if (bmsr & BMSR_LINK) 320 mii->mii_media_status |= IFM_ACTIVE; 321 322 bmcr = PHY_READ(sc, MII_BMCR); 323 if (bmcr & BMCR_ISO) { 324 mii->mii_media_active |= IFM_NONE; 325 mii->mii_media_status = 0; 326 return; 327 } 328 329 if (bmcr & BMCR_LOOP) 330 mii->mii_media_active |= IFM_LOOP; 331 332 if (bmcr & BMCR_AUTOEN) { 333 /* 334 * The PAR status bits are only valid of autonegotiation 335 * has completed (or it's disabled). 336 */ 337 if ((bmsr & BMSR_ACOMP) == 0) { 338 /* Erg, still trying, I guess... */ 339 mii->mii_media_active |= IFM_NONE; 340 return; 341 } 342 343 /* 344 * Argh. The PAR doesn't seem to indicate duplex mode 345 * properly! Determine media based on link partner's 346 * advertised capabilities. 347 */ 348 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 349 anlpar = PHY_READ(sc, MII_ANAR) & 350 PHY_READ(sc, MII_ANLPAR); 351 if (anlpar & ANLPAR_T4) 352 mii->mii_media_active |= IFM_100_T4; 353 else if (anlpar & ANLPAR_TX_FD) 354 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 355 else if (anlpar & ANLPAR_TX) 356 mii->mii_media_active |= IFM_100_TX; 357 else if (anlpar & ANLPAR_10_FD) 358 mii->mii_media_active |= IFM_10_T|IFM_FDX; 359 else if (anlpar & ANLPAR_10) 360 mii->mii_media_active |= IFM_10_T; 361 else 362 mii->mii_media_active |= IFM_NONE; 363 return; 364 } 365 366 /* 367 * Link partner is not capable of autonegotiation. 368 * We will never be in full-duplex mode if this is 369 * the case, so reading the PAR is OK. 370 */ 371 par = PHY_READ(sc, MII_NSPHY_PAR); 372 if (par & PAR_10) 373 mii->mii_media_active |= IFM_10_T; 374 else 375 mii->mii_media_active |= IFM_100_TX; 376 #if 0 377 if (par & PAR_FDX) 378 mii->mii_media_active |= IFM_FDX; 379 #endif 380 } else 381 mii->mii_media_active = mii_media_from_bmcr(bmcr); 382 } 383
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