nsphy.c revision 1.13
1/* $OpenBSD: nsphy.c,v 1.13 2004/09/20 06:05:27 brad 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/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 91int nsphymatch(struct device *, void *, void *); 92void nsphyattach(struct device *, struct device *, void *); 93 94struct cfattach nsphy_ca = { 95 sizeof(struct mii_softc), nsphymatch, nsphyattach, mii_phy_detach, 96 mii_phy_activate 97}; 98 99struct cfdriver nsphy_cd = { 100 NULL, "nsphy", DV_DULL 101}; 102 103int nsphy_service(struct mii_softc *, struct mii_data *, int); 104void nsphy_status(struct mii_softc *); 105void nsphy_reset(struct mii_softc *); 106 107int 108nsphymatch(parent, match, aux) 109 struct device *parent; 110 void *match; 111 void *aux; 112{ 113 struct mii_attach_args *ma = aux; 114 115 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI && 116 MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) 117 return (10); 118 119 return (0); 120} 121 122void 123nsphyattach(parent, self, aux) 124 struct device *parent; 125 struct device *self; 126 void *aux; 127{ 128 struct mii_softc *sc = (struct mii_softc *)self; 129 struct mii_attach_args *ma = aux; 130 struct mii_data *mii = ma->mii_data; 131 132 printf(": %s, rev. %d\n", MII_STR_NATSEMI_DP83840, 133 MII_REV(ma->mii_id2)); 134 135 sc->mii_inst = mii->mii_instance; 136 sc->mii_phy = ma->mii_phyno; 137 sc->mii_service = nsphy_service; 138 sc->mii_status = nsphy_status; 139 sc->mii_pdata = mii; 140 sc->mii_flags = mii->mii_flags; 141 sc->mii_anegticks = 5; 142 143 nsphy_reset(sc); 144 145 sc->mii_capabilities = 146 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 147 if (sc->mii_capabilities & BMSR_MEDIAMASK) 148 mii_phy_add_media(sc); 149} 150 151int 152nsphy_service(sc, mii, cmd) 153 struct mii_softc *sc; 154 struct mii_data *mii; 155 int cmd; 156{ 157 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 158 int reg; 159 160 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0) 161 return (ENXIO); 162 163 switch (cmd) { 164 case MII_POLLSTAT: 165 /* 166 * If we're not polling our PHY instance, just return. 167 */ 168 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 169 return (0); 170 break; 171 172 case MII_MEDIACHG: 173 /* 174 * If the media indicates a different PHY instance, 175 * isolate ourselves. 176 */ 177 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 178 reg = PHY_READ(sc, MII_BMCR); 179 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 180 return (0); 181 } 182 183 /* 184 * If the interface is not up, don't do anything. 185 */ 186 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 187 break; 188 189 reg = PHY_READ(sc, MII_NSPHY_PCR); 190 191 /* 192 * Set up the PCR to use LED4 to indicate full-duplex 193 * in both 10baseT and 100baseTX modes. 194 */ 195 reg |= PCR_LED4MODE; 196 197 /* 198 * Make sure Carrier Integrity Monitor function is 199 * disabled (normal for Node operation, but sometimes 200 * it's not set?!) 201 */ 202 reg |= PCR_CIMDIS; 203 204 /* 205 * Make sure "force link good" is set to normal mode. 206 * It's only intended for debugging. 207 */ 208 reg |= PCR_FLINK100; 209 210 /* 211 * Mystery bits which are supposedly `reserved', 212 * but we seem to need to set them when the PHY 213 * is connected to some interfaces! 214 */ 215 reg |= PCR_CONGCTRL | PCR_TXREADYSEL; 216 217 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 218 219 mii_phy_setmedia(sc); 220 break; 221 222 case MII_TICK: 223 /* 224 * If we're not currently selected, just return. 225 */ 226 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 227 return (0); 228 229 /* 230 * Only used for autonegotiation. 231 */ 232 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 233 return (0); 234 235 /* 236 * Is the interface even up? 237 */ 238 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 239 return (0); 240 241 /* 242 * Check to see if we have link. If we do, we don't 243 * need to restart the autonegotiation process. Read 244 * the BMSR twice in case it's latched. 245 */ 246 reg = PHY_READ(sc, MII_BMSR) | 247 PHY_READ(sc, MII_BMSR); 248 if (reg & BMSR_LINK) 249 return (0); 250 251 /* 252 * Only retry autonegotiation every 5 seconds. 253 */ 254 if (++sc->mii_ticks != sc->mii_anegticks) 255 return (0); 256 257 sc->mii_ticks = 0; 258 nsphy_reset(sc); 259 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 260 return (0); 261 break; 262 263 case MII_DOWN: 264 mii_phy_down(sc); 265 return (0); 266 } 267 268 /* Update the media status. */ 269 mii_phy_status(sc); 270 271 /* Callback if something changed. */ 272 mii_phy_update(sc, cmd); 273 return (0); 274} 275 276void 277nsphy_status(sc) 278 struct mii_softc *sc; 279{ 280 struct mii_data *mii = sc->mii_pdata; 281 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 282 int bmsr, bmcr, par, anlpar; 283 284 mii->mii_media_status = IFM_AVALID; 285 mii->mii_media_active = IFM_ETHER; 286 287 bmsr = PHY_READ(sc, MII_BMSR) | 288 PHY_READ(sc, MII_BMSR); 289 if (bmsr & BMSR_LINK) 290 mii->mii_media_status |= IFM_ACTIVE; 291 292 bmcr = PHY_READ(sc, MII_BMCR); 293 if (bmcr & BMCR_ISO) { 294 mii->mii_media_active |= IFM_NONE; 295 mii->mii_media_status = 0; 296 return; 297 } 298 299 if (bmcr & BMCR_LOOP) 300 mii->mii_media_active |= IFM_LOOP; 301 302 if (bmcr & BMCR_AUTOEN) { 303 /* 304 * The PAR status bits are only valid of autonegotiation 305 * has completed (or it's disabled). 306 */ 307 if ((bmsr & BMSR_ACOMP) == 0) { 308 /* Erg, still trying, I guess... */ 309 mii->mii_media_active |= IFM_NONE; 310 return; 311 } 312 313 /* 314 * Argh. The PAR doesn't seem to indicate duplex mode 315 * properly! Determine media based on link partner's 316 * advertised capabilities. 317 */ 318 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 319 anlpar = PHY_READ(sc, MII_ANAR) & 320 PHY_READ(sc, MII_ANLPAR); 321 if (anlpar & ANLPAR_T4) 322 mii->mii_media_active |= IFM_100_T4; 323 else if (anlpar & ANLPAR_TX_FD) 324 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 325 else if (anlpar & ANLPAR_TX) 326 mii->mii_media_active |= IFM_100_TX; 327 else if (anlpar & ANLPAR_10_FD) 328 mii->mii_media_active |= IFM_10_T|IFM_FDX; 329 else if (anlpar & ANLPAR_10) 330 mii->mii_media_active |= IFM_10_T; 331 else 332 mii->mii_media_active |= IFM_NONE; 333 return; 334 } 335 336 /* 337 * Link partner is not capable of autonegotiation. 338 * We will never be in full-duplex mode if this is 339 * the case, so reading the PAR is OK. 340 */ 341 par = PHY_READ(sc, MII_NSPHY_PAR); 342 if (par & PAR_10) 343 mii->mii_media_active |= IFM_10_T; 344 else 345 mii->mii_media_active |= IFM_100_TX; 346#if 0 347 if (par & PAR_FDX) 348 mii->mii_media_active |= IFM_FDX; 349#endif 350 } else 351 mii->mii_media_active = ife->ifm_media; 352} 353 354void 355nsphy_reset(sc) 356 struct mii_softc *sc; 357{ 358 int anar; 359 360 mii_phy_reset(sc); 361 anar = PHY_READ(sc, MII_ANAR); 362 anar |= BMSR_MEDIA_TO_ANAR(PHY_READ(sc, MII_BMSR)); 363 PHY_WRITE(sc, MII_ANAR, anar); 364} 365