nsphy.c revision 1.24
1 /* $NetBSD: nsphy.c,v 1.24 2000/02/02 17:50:45 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_phy_detach, 96 mii_phy_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_status = nsphy_status; 133 sc->mii_pdata = mii; 134 sc->mii_flags = mii->mii_flags; 135 136 mii_phy_reset(sc); 137 138 sc->mii_capabilities = 139 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 140 printf("%s: ", sc->mii_dev.dv_xname); 141 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 142 printf("no media present"); 143 else 144 mii_phy_add_media(sc); 145 printf("\n"); 146 } 147 148 int 149 nsphy_service(sc, mii, cmd) 150 struct mii_softc *sc; 151 struct mii_data *mii; 152 int cmd; 153 { 154 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 155 int reg; 156 157 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0) 158 return (ENXIO); 159 160 switch (cmd) { 161 case MII_POLLSTAT: 162 /* 163 * If we're not polling our PHY instance, just return. 164 */ 165 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 166 return (0); 167 break; 168 169 case MII_MEDIACHG: 170 /* 171 * If the media indicates a different PHY instance, 172 * isolate ourselves. 173 */ 174 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 175 reg = PHY_READ(sc, MII_BMCR); 176 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 177 return (0); 178 } 179 180 /* 181 * If the interface is not up, don't do anything. 182 */ 183 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 184 break; 185 186 reg = PHY_READ(sc, MII_NSPHY_PCR); 187 188 /* 189 * Set up the PCR to use LED4 to indicate full-duplex 190 * in both 10baseT and 100baseTX modes. 191 */ 192 reg |= PCR_LED4MODE; 193 194 /* 195 * Make sure Carrier Intgrity Monitor function is 196 * disabled (normal for Node operation, but sometimes 197 * it's not set?!) 198 */ 199 reg |= PCR_CIMDIS; 200 201 /* 202 * Make sure "force link good" is set to normal mode. 203 * It's only intended for debugging. 204 */ 205 reg |= PCR_FLINK100; 206 207 #if 0 208 /* 209 * Mystery bits which are supposedly `reserved', 210 * but we seem to need to set them when the PHY 211 * is connected to some interfaces! 212 */ 213 reg |= 0x0100 | 0x0400; 214 #endif 215 216 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 217 218 switch (IFM_SUBTYPE(ife->ifm_media)) { 219 case IFM_AUTO: 220 /* 221 * If we're already in auto mode, just return. 222 */ 223 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 224 return (0); 225 (void) mii_phy_auto(sc, 1); 226 break; 227 default: 228 mii_phy_setmedia(sc); 229 } 230 break; 231 232 case MII_TICK: 233 /* 234 * If we're not currently selected, just return. 235 */ 236 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 237 return (0); 238 239 /* 240 * Only used for autonegotiation. 241 */ 242 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 243 return (0); 244 245 /* 246 * Is the interface even up? 247 */ 248 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 249 return (0); 250 251 /* 252 * Check to see if we have link. If we do, we don't 253 * need to restart the autonegotiation process. Read 254 * the BMSR twice in case it's latched. 255 */ 256 reg = PHY_READ(sc, MII_BMSR) | 257 PHY_READ(sc, MII_BMSR); 258 if (reg & BMSR_LINK) 259 return (0); 260 261 /* 262 * Only retry autonegotiation every 5 seconds. 263 */ 264 if (++sc->mii_ticks != 5) 265 return (0); 266 267 sc->mii_ticks = 0; 268 mii_phy_reset(sc); 269 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 270 return (0); 271 break; 272 273 case MII_DOWN: 274 mii_phy_down(sc); 275 return (0); 276 } 277 278 /* Update the media status. */ 279 mii_phy_status(sc); 280 281 /* Callback if something changed. */ 282 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 283 (*mii->mii_statchg)(sc->mii_dev.dv_parent); 284 sc->mii_active = mii->mii_media_active; 285 } 286 return (0); 287 } 288 289 void 290 nsphy_status(sc) 291 struct mii_softc *sc; 292 { 293 struct mii_data *mii = sc->mii_pdata; 294 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 295 int bmsr, bmcr, par, anlpar; 296 297 mii->mii_media_status = IFM_AVALID; 298 mii->mii_media_active = IFM_ETHER; 299 300 bmsr = PHY_READ(sc, MII_BMSR) | 301 PHY_READ(sc, MII_BMSR); 302 if (bmsr & BMSR_LINK) 303 mii->mii_media_status |= IFM_ACTIVE; 304 305 bmcr = PHY_READ(sc, MII_BMCR); 306 if (bmcr & BMCR_ISO) { 307 mii->mii_media_active |= IFM_NONE; 308 mii->mii_media_status = 0; 309 return; 310 } 311 312 if (bmcr & BMCR_LOOP) 313 mii->mii_media_active |= IFM_LOOP; 314 315 if (bmcr & BMCR_AUTOEN) { 316 /* 317 * The PAR status bits are only valid of autonegotiation 318 * has completed (or it's disabled). 319 */ 320 if ((bmsr & BMSR_ACOMP) == 0) { 321 /* Erg, still trying, I guess... */ 322 mii->mii_media_active |= IFM_NONE; 323 return; 324 } 325 326 /* 327 * Argh. The PAR doesn't seem to indicate duplex mode 328 * properly! Determine media based on link partner's 329 * advertised capabilities. 330 */ 331 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 332 anlpar = PHY_READ(sc, MII_ANAR) & 333 PHY_READ(sc, MII_ANLPAR); 334 if (anlpar & ANLPAR_T4) 335 mii->mii_media_active |= IFM_100_T4; 336 else if (anlpar & ANLPAR_TX_FD) 337 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 338 else if (anlpar & ANLPAR_TX) 339 mii->mii_media_active |= IFM_100_TX; 340 else if (anlpar & ANLPAR_10_FD) 341 mii->mii_media_active |= IFM_10_T|IFM_FDX; 342 else if (anlpar & ANLPAR_10) 343 mii->mii_media_active |= IFM_10_T; 344 else 345 mii->mii_media_active |= IFM_NONE; 346 return; 347 } 348 349 /* 350 * Link partner is not capable of autonegotiation. 351 * We will never be in full-duplex mode if this is 352 * the case, so reading the PAR is OK. 353 */ 354 par = PHY_READ(sc, MII_NSPHY_PAR); 355 if (par & PAR_10) 356 mii->mii_media_active |= IFM_10_T; 357 else 358 mii->mii_media_active |= IFM_100_TX; 359 #if 0 360 if (par & PAR_FDX) 361 mii->mii_media_active |= IFM_FDX; 362 #endif 363 } else 364 mii->mii_media_active = ife->ifm_media; 365 } 366
Indexes created Wed Oct 22 13:09:56 GMT 2025