nsphy.c revision 1.21
1 /* $NetBSD: nsphy.c,v 1.21 2000/01/27 16:44:30 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999 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 #include <sys/errno.h> 81 82 #include <net/if.h> 83 #include <net/if_media.h> 84 85 #include <dev/mii/mii.h> 86 #include <dev/mii/miivar.h> 87 #include <dev/mii/miidevs.h> 88 89 #include <dev/mii/nsphyreg.h> 90 91 int nsphymatch __P((struct device *, struct cfdata *, void *)); 92 void nsphyattach __P((struct device *, struct device *, void *)); 93 94 struct cfattach nsphy_ca = { 95 sizeof(struct mii_softc), nsphymatch, nsphyattach, mii_detach, 96 mii_activate 97 }; 98 99 int nsphy_service __P((struct mii_softc *, struct mii_data *, int)); 100 void nsphy_status __P((struct mii_softc *)); 101 102 int 103 nsphymatch(parent, match, aux) 104 struct device *parent; 105 struct cfdata *match; 106 void *aux; 107 { 108 struct mii_attach_args *ma = aux; 109 110 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI && 111 MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) 112 return (10); 113 114 return (0); 115 } 116 117 void 118 nsphyattach(parent, self, aux) 119 struct device *parent, *self; 120 void *aux; 121 { 122 struct mii_softc *sc = (struct mii_softc *)self; 123 struct mii_attach_args *ma = aux; 124 struct mii_data *mii = ma->mii_data; 125 126 printf(": %s, rev. %d\n", MII_STR_NATSEMI_DP83840, 127 MII_REV(ma->mii_id2)); 128 129 sc->mii_inst = mii->mii_instance; 130 sc->mii_phy = ma->mii_phyno; 131 sc->mii_service = nsphy_service; 132 sc->mii_pdata = mii; 133 134 /* 135 * i82557 wedges if all of its PHYs are isolated! 136 */ 137 if (strcmp(parent->dv_cfdata->cf_driver->cd_name, "fxp") == 0 && 138 mii->mii_instance == 0) 139 sc->mii_flags |= MIIF_NOISOLATE; 140 141 mii_phy_reset(sc); 142 143 sc->mii_capabilities = 144 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 145 printf("%s: ", sc->mii_dev.dv_xname); 146 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 147 printf("no media present"); 148 else 149 mii_add_media(sc); 150 printf("\n"); 151 } 152 153 int 154 nsphy_service(sc, mii, cmd) 155 struct mii_softc *sc; 156 struct mii_data *mii; 157 int cmd; 158 { 159 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 160 int reg; 161 162 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0) 163 return (ENXIO); 164 165 switch (cmd) { 166 case MII_POLLSTAT: 167 /* 168 * If we're not polling our PHY instance, just return. 169 */ 170 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 171 return (0); 172 break; 173 174 case MII_MEDIACHG: 175 /* 176 * If the media indicates a different PHY instance, 177 * isolate ourselves. 178 */ 179 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 180 reg = PHY_READ(sc, MII_BMCR); 181 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 182 return (0); 183 } 184 185 /* 186 * If the interface is not up, don't do anything. 187 */ 188 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 189 break; 190 191 reg = PHY_READ(sc, MII_NSPHY_PCR); 192 193 /* 194 * Set up the PCR to use LED4 to indicate full-duplex 195 * in both 10baseT and 100baseTX modes. 196 */ 197 reg |= PCR_LED4MODE; 198 199 /* 200 * Make sure Carrier Intgrity Monitor function is 201 * disabled (normal for Node operation, but sometimes 202 * it's not set?!) 203 */ 204 reg |= PCR_CIMDIS; 205 206 /* 207 * Make sure "force link good" is set to normal mode. 208 * It's only intended for debugging. 209 */ 210 reg |= PCR_FLINK100; 211 212 #if 0 213 /* 214 * Mystery bits which are supposedly `reserved', 215 * but we seem to need to set them when the PHY 216 * is connected to some interfaces! 217 */ 218 reg |= 0x0100 | 0x0400; 219 #endif 220 221 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 222 223 switch (IFM_SUBTYPE(ife->ifm_media)) { 224 case IFM_AUTO: 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 mii_phy_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 } 293 294 void 295 nsphy_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
Indexes created Thu Oct 23 18:09:57 GMT 2025