1 /* $OpenBSD: nsphy.c,v 1.10 2001/10/05 18:26:48 nate Exp $ */ 2 /* $NetBSD: nsphy.c,v 1.25 2000/02/02 23:34:57 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 92 int nsphymatch __P((struct device *, void *, void *)); 93 void nsphyattach __P((struct device *, struct device *, void *)); 94 95 struct cfattach nsphy_ca = { 96 sizeof(struct mii_softc), nsphymatch, nsphyattach, mii_phy_detach, 97 mii_phy_activate 98 }; 99 100 struct cfdriver nsphy_cd = { 101 NULL, "nsphy", DV_DULL 102 }; 103 104 int nsphy_service __P((struct mii_softc *, struct mii_data *, int)); 105 void nsphy_status __P((struct mii_softc *)); 106 void nsphy_reset __P((struct mii_softc *)); 107 108 int 109 nsphymatch(parent, match, aux) 110 struct device *parent; 111 void *match; 112 void *aux; 113 { 114 struct mii_attach_args *ma = aux; 115 116 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI && 117 MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) 118 return (10); 119 120 return (0); 121 } 122 123 void 124 nsphyattach(parent, self, aux) 125 struct device *parent; 126 struct device *self; 127 void *aux; 128 { 129 struct mii_softc *sc = (struct mii_softc *)self; 130 struct mii_attach_args *ma = aux; 131 struct mii_data *mii = ma->mii_data; 132 133 printf(": %s, rev. %d\n", MII_STR_NATSEMI_DP83840, 134 MII_REV(ma->mii_id2)); 135 136 sc->mii_inst = mii->mii_instance; 137 sc->mii_phy = ma->mii_phyno; 138 sc->mii_service = nsphy_service; 139 sc->mii_status = nsphy_status; 140 sc->mii_pdata = mii; 141 sc->mii_flags = mii->mii_flags; 142 sc->mii_anegticks = 5; 143 144 nsphy_reset(sc); 145 146 sc->mii_capabilities = 147 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 148 if (sc->mii_capabilities & BMSR_MEDIAMASK) 149 mii_phy_add_media(sc); 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 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0) 162 return (ENXIO); 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 /* 212 * Mystery bits which are supposedly `reserved', 213 * but we seem to need to set them when the PHY 214 * is connected to some interfaces! 215 */ 216 reg |= PCR_CONGCTRL | PCR_TXREADYSEL; 217 218 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 219 220 mii_phy_setmedia(sc); 221 break; 222 223 case MII_TICK: 224 /* 225 * If we're not currently selected, just return. 226 */ 227 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 228 return (0); 229 230 /* 231 * Only used for autonegotiation. 232 */ 233 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 234 return (0); 235 236 /* 237 * Is the interface even up? 238 */ 239 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 240 return (0); 241 242 /* 243 * Check to see if we have link. If we do, we don't 244 * need to restart the autonegotiation process. Read 245 * the BMSR twice in case it's latched. 246 */ 247 reg = PHY_READ(sc, MII_BMSR) | 248 PHY_READ(sc, MII_BMSR); 249 if (reg & BMSR_LINK) 250 return (0); 251 252 /* 253 * Only retry autonegotiation every 5 seconds. 254 */ 255 if (++sc->mii_ticks != sc->mii_anegticks) 256 return (0); 257 258 sc->mii_ticks = 0; 259 nsphy_reset(sc); 260 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 261 return (0); 262 break; 263 264 case MII_DOWN: 265 mii_phy_down(sc); 266 return (0); 267 } 268 269 /* Update the media status. */ 270 mii_phy_status(sc); 271 272 /* Callback if something changed. */ 273 mii_phy_update(sc, cmd); 274 return (0); 275 } 276 277 void 278 nsphy_status(sc) 279 struct mii_softc *sc; 280 { 281 struct mii_data *mii = sc->mii_pdata; 282 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 283 int bmsr, bmcr, par, anlpar; 284 285 mii->mii_media_status = IFM_AVALID; 286 mii->mii_media_active = IFM_ETHER; 287 288 bmsr = PHY_READ(sc, MII_BMSR) | 289 PHY_READ(sc, MII_BMSR); 290 if (bmsr & BMSR_LINK) 291 mii->mii_media_status |= IFM_ACTIVE; 292 293 bmcr = PHY_READ(sc, MII_BMCR); 294 if (bmcr & BMCR_ISO) { 295 mii->mii_media_active |= IFM_NONE; 296 mii->mii_media_status = 0; 297 return; 298 } 299 300 if (bmcr & BMCR_LOOP) 301 mii->mii_media_active |= IFM_LOOP; 302 303 if (bmcr & BMCR_AUTOEN) { 304 /* 305 * The PAR status bits are only valid of autonegotiation 306 * has completed (or it's disabled). 307 */ 308 if ((bmsr & BMSR_ACOMP) == 0) { 309 /* Erg, still trying, I guess... */ 310 mii->mii_media_active |= IFM_NONE; 311 return; 312 } 313 314 /* 315 * Argh. The PAR doesn't seem to indicate duplex mode 316 * properly! Determine media based on link partner's 317 * advertised capabilities. 318 */ 319 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 320 anlpar = PHY_READ(sc, MII_ANAR) & 321 PHY_READ(sc, MII_ANLPAR); 322 if (anlpar & ANLPAR_T4) 323 mii->mii_media_active |= IFM_100_T4; 324 else if (anlpar & ANLPAR_TX_FD) 325 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 326 else if (anlpar & ANLPAR_TX) 327 mii->mii_media_active |= IFM_100_TX; 328 else if (anlpar & ANLPAR_10_FD) 329 mii->mii_media_active |= IFM_10_T|IFM_FDX; 330 else if (anlpar & ANLPAR_10) 331 mii->mii_media_active |= IFM_10_T; 332 else 333 mii->mii_media_active |= IFM_NONE; 334 return; 335 } 336 337 /* 338 * Link partner is not capable of autonegotiation. 339 * We will never be in full-duplex mode if this is 340 * the case, so reading the PAR is OK. 341 */ 342 par = PHY_READ(sc, MII_NSPHY_PAR); 343 if (par & PAR_10) 344 mii->mii_media_active |= IFM_10_T; 345 else 346 mii->mii_media_active |= IFM_100_TX; 347 #if 0 348 if (par & PAR_FDX) 349 mii->mii_media_active |= IFM_FDX; 350 #endif 351 } else 352 mii->mii_media_active = ife->ifm_media; 353 } 354 355 void 356 nsphy_reset(sc) 357 struct mii_softc *sc; 358 { 359 int anar; 360 361 mii_phy_reset(sc); 362 anar = PHY_READ(sc, MII_ANAR); 363 anar |= BMSR_MEDIA_TO_ANAR(PHY_READ(sc, MII_BMSR)); 364 PHY_WRITE(sc, MII_ANAR, anar); 365 } 366