nsphy.c revision 1.20
1 /* $NetBSD: nsphy.c,v 1.20 1999/11/12 18:13:01 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 96 }; 97 98 int nsphy_service __P((struct mii_softc *, struct mii_data *, int)); 99 void nsphy_status __P((struct mii_softc *)); 100 101 int 102 nsphymatch(parent, match, aux) 103 struct device *parent; 104 struct cfdata *match; 105 void *aux; 106 { 107 struct mii_attach_args *ma = aux; 108 109 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI && 110 MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) 111 return (10); 112 113 return (0); 114 } 115 116 void 117 nsphyattach(parent, self, aux) 118 struct device *parent, *self; 119 void *aux; 120 { 121 struct mii_softc *sc = (struct mii_softc *)self; 122 struct mii_attach_args *ma = aux; 123 struct mii_data *mii = ma->mii_data; 124 125 printf(": %s, rev. %d\n", MII_STR_NATSEMI_DP83840, 126 MII_REV(ma->mii_id2)); 127 128 sc->mii_inst = mii->mii_instance; 129 sc->mii_phy = ma->mii_phyno; 130 sc->mii_service = nsphy_service; 131 sc->mii_pdata = mii; 132 133 /* 134 * i82557 wedges if all of its PHYs are isolated! 135 */ 136 if (strcmp(parent->dv_cfdata->cf_driver->cd_name, "fxp") == 0 && 137 mii->mii_instance == 0) 138 sc->mii_flags |= MIIF_NOISOLATE; 139 140 mii_phy_reset(sc); 141 142 sc->mii_capabilities = 143 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 144 printf("%s: ", sc->mii_dev.dv_xname); 145 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 146 printf("no media present"); 147 else 148 mii_add_media(sc); 149 printf("\n"); 150 } 151 152 int 153 nsphy_service(sc, mii, cmd) 154 struct mii_softc *sc; 155 struct mii_data *mii; 156 int cmd; 157 { 158 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 159 int reg; 160 161 switch (cmd) { 162 case MII_POLLSTAT: 163 /* 164 * If we're not polling our PHY instance, just return. 165 */ 166 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 167 return (0); 168 break; 169 170 case MII_MEDIACHG: 171 /* 172 * If the media indicates a different PHY instance, 173 * isolate ourselves. 174 */ 175 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 176 reg = PHY_READ(sc, MII_BMCR); 177 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 178 return (0); 179 } 180 181 /* 182 * If the interface is not up, don't do anything. 183 */ 184 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 185 break; 186 187 reg = PHY_READ(sc, MII_NSPHY_PCR); 188 189 /* 190 * Set up the PCR to use LED4 to indicate full-duplex 191 * in both 10baseT and 100baseTX modes. 192 */ 193 reg |= PCR_LED4MODE; 194 195 /* 196 * Make sure Carrier Intgrity Monitor function is 197 * disabled (normal for Node operation, but sometimes 198 * it's not set?!) 199 */ 200 reg |= PCR_CIMDIS; 201 202 /* 203 * Make sure "force link good" is set to normal mode. 204 * It's only intended for debugging. 205 */ 206 reg |= PCR_FLINK100; 207 208 #if 0 209 /* 210 * Mystery bits which are supposedly `reserved', 211 * but we seem to need to set them when the PHY 212 * is connected to some interfaces! 213 */ 214 reg |= 0x0100 | 0x0400; 215 #endif 216 217 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 218 219 switch (IFM_SUBTYPE(ife->ifm_media)) { 220 case IFM_AUTO: 221 /* 222 * If we're already in auto mode, just return. 223 */ 224 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 225 return (0); 226 (void) mii_phy_auto(sc, 1); 227 break; 228 default: 229 mii_phy_setmedia(sc); 230 } 231 break; 232 233 case MII_TICK: 234 /* 235 * If we're not currently selected, just return. 236 */ 237 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 238 return (0); 239 240 /* 241 * Only used for autonegotiation. 242 */ 243 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 244 return (0); 245 246 /* 247 * Is the interface even up? 248 */ 249 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 250 return (0); 251 252 /* 253 * Check to see if we have link. If we do, we don't 254 * need to restart the autonegotiation process. Read 255 * the BMSR twice in case it's latched. 256 */ 257 reg = PHY_READ(sc, MII_BMSR) | 258 PHY_READ(sc, MII_BMSR); 259 if (reg & BMSR_LINK) 260 return (0); 261 262 /* 263 * Only retry autonegotiation every 5 seconds. 264 */ 265 if (++sc->mii_ticks != 5) 266 return (0); 267 268 sc->mii_ticks = 0; 269 mii_phy_reset(sc); 270 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 271 return (0); 272 break; 273 274 case MII_DOWN: 275 mii_phy_down(sc); 276 return (0); 277 } 278 279 /* Update the media status. */ 280 nsphy_status(sc); 281 282 /* Callback if something changed. */ 283 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 284 (*mii->mii_statchg)(sc->mii_dev.dv_parent); 285 sc->mii_active = mii->mii_media_active; 286 } 287 return (0); 288 } 289 290 void 291 nsphy_status(sc) 292 struct mii_softc *sc; 293 { 294 struct mii_data *mii = sc->mii_pdata; 295 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 296 int bmsr, bmcr, par, anlpar; 297 298 mii->mii_media_status = IFM_AVALID; 299 mii->mii_media_active = IFM_ETHER; 300 301 bmsr = PHY_READ(sc, MII_BMSR) | 302 PHY_READ(sc, MII_BMSR); 303 if (bmsr & BMSR_LINK) 304 mii->mii_media_status |= IFM_ACTIVE; 305 306 bmcr = PHY_READ(sc, MII_BMCR); 307 if (bmcr & BMCR_ISO) { 308 mii->mii_media_active |= IFM_NONE; 309 mii->mii_media_status = 0; 310 return; 311 } 312 313 if (bmcr & BMCR_LOOP) 314 mii->mii_media_active |= IFM_LOOP; 315 316 if (bmcr & BMCR_AUTOEN) { 317 /* 318 * The PAR status bits are only valid of autonegotiation 319 * has completed (or it's disabled). 320 */ 321 if ((bmsr & BMSR_ACOMP) == 0) { 322 /* Erg, still trying, I guess... */ 323 mii->mii_media_active |= IFM_NONE; 324 return; 325 } 326 327 /* 328 * Argh. The PAR doesn't seem to indicate duplex mode 329 * properly! Determine media based on link partner's 330 * advertised capabilities. 331 */ 332 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 333 anlpar = PHY_READ(sc, MII_ANAR) & 334 PHY_READ(sc, MII_ANLPAR); 335 if (anlpar & ANLPAR_T4) 336 mii->mii_media_active |= IFM_100_T4; 337 else if (anlpar & ANLPAR_TX_FD) 338 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 339 else if (anlpar & ANLPAR_TX) 340 mii->mii_media_active |= IFM_100_TX; 341 else if (anlpar & ANLPAR_10_FD) 342 mii->mii_media_active |= IFM_10_T|IFM_FDX; 343 else if (anlpar & ANLPAR_10) 344 mii->mii_media_active |= IFM_10_T; 345 else 346 mii->mii_media_active |= IFM_NONE; 347 return; 348 } 349 350 /* 351 * Link partner is not capable of autonegotiation. 352 * We will never be in full-duplex mode if this is 353 * the case, so reading the PAR is OK. 354 */ 355 par = PHY_READ(sc, MII_NSPHY_PAR); 356 if (par & PAR_10) 357 mii->mii_media_active |= IFM_10_T; 358 else 359 mii->mii_media_active |= IFM_100_TX; 360 #if 0 361 if (par & PAR_FDX) 362 mii->mii_media_active |= IFM_FDX; 363 #endif 364 } else 365 mii->mii_media_active = ife->ifm_media; 366 } 367
Indexes created Wed Oct 22 13:09:56 GMT 2025