1 /* $NetBSD: nsphy.c,v 1.18 1999/07/14 23:57:36 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/malloc.h> 78 #include <sys/socket.h> 79 #include <sys/errno.h> 80 #include <sys/module.h> 81 #include <sys/bus.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 #include "miibus_if.h" 93 94 #if !defined(lint) 95 static const char rcsid[] = 96 "$Id$"; 97 #endif 98 99 static int nsphy_probe __P((device_t)); 100 static int nsphy_attach __P((device_t)); 101 static int nsphy_detach __P((device_t)); 102 103 static device_method_t nsphy_methods[] = { 104 /* device interface */ 105 DEVMETHOD(device_probe, nsphy_probe), 106 DEVMETHOD(device_attach, nsphy_attach), 107 DEVMETHOD(device_detach, nsphy_detach), 108 DEVMETHOD(device_shutdown, bus_generic_shutdown), 109 { 0, 0 } 110 }; 111 112 static devclass_t nsphy_devclass; 113 114 static driver_t nsphy_driver = { 115 "nsphy", 116 nsphy_methods, 117 sizeof(struct mii_softc) 118 }; 119 120 DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0); 121 122 int nsphy_service __P((struct mii_softc *, struct mii_data *, int)); 123 void nsphy_status __P((struct mii_softc *)); 124 125 static int nsphy_probe(dev) 126 device_t dev; 127 { 128 struct mii_attach_args *ma; 129 130 ma = device_get_ivars(dev); 131 132 if (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_NATSEMI || 133 MII_MODEL(ma->mii_id2) != MII_MODEL_NATSEMI_DP83840) 134 return (ENXIO); 135 136 device_set_desc(dev, MII_STR_NATSEMI_DP83840); 137 138 return (0); 139 } 140 141 static int nsphy_attach(dev) 142 device_t dev; 143 { 144 struct mii_softc *sc; 145 struct mii_attach_args *ma; 146 struct mii_data *mii; 147 148 sc = device_get_softc(dev); 149 ma = device_get_ivars(dev); 150 sc->mii_dev = device_get_parent(dev); 151 mii = device_get_softc(sc->mii_dev); 152 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 153 154 sc->mii_inst = mii->mii_instance; 155 sc->mii_phy = ma->mii_phyno; 156 sc->mii_service = nsphy_service; 157 sc->mii_pdata = mii; 158 159 #ifdef foo 160 /* 161 * i82557 wedges if all of its PHYs are isolated! 162 */ 163 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 164 "fxp") == 0 && mii->mii_instance == 0) 165 #endif 166 167 sc->mii_flags |= MIIF_NOISOLATE; 168 mii->mii_instance++; 169 170 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 171 172 #if 0 173 /* Can't do this on the i82557! */ 174 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 175 BMCR_ISO); 176 #endif 177 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 178 BMCR_LOOP|BMCR_S100); 179 180 mii_phy_reset(sc); 181 182 sc->mii_capabilities = 183 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 184 device_printf(dev, " "); 185 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 186 printf("no media present"); 187 else 188 mii_add_media(mii, sc->mii_capabilities, 189 sc->mii_inst); 190 printf("\n"); 191 #undef ADD 192 193 MIIBUS_MEDIAINIT(sc->mii_dev); 194 return(0); 195 } 196 197 static int nsphy_detach(dev) 198 device_t dev; 199 { 200 struct mii_softc *sc; 201 struct mii_data *mii; 202 203 sc = device_get_softc(dev); 204 mii = device_get_softc(device_get_parent(dev)); 205 sc->mii_dev = NULL; 206 LIST_REMOVE(sc, mii_list); 207 208 return(0); 209 } 210 211 int 212 nsphy_service(sc, mii, cmd) 213 struct mii_softc *sc; 214 struct mii_data *mii; 215 int cmd; 216 { 217 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 218 int reg; 219 220 switch (cmd) { 221 case MII_POLLSTAT: 222 /* 223 * If we're not polling our PHY instance, just return. 224 */ 225 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 226 return (0); 227 break; 228 229 case MII_MEDIACHG: 230 /* 231 * If the media indicates a different PHY instance, 232 * isolate ourselves. 233 */ 234 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 235 reg = PHY_READ(sc, MII_BMCR); 236 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 237 return (0); 238 } 239 240 /* 241 * If the interface is not up, don't do anything. 242 */ 243 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 244 break; 245 246 reg = PHY_READ(sc, MII_NSPHY_PCR); 247 248 /* 249 * Set up the PCR to use LED4 to indicate full-duplex 250 * in both 10baseT and 100baseTX modes. 251 */ 252 reg |= PCR_LED4MODE; 253 254 /* 255 * Make sure Carrier Intgrity Monitor function is 256 * disabled (normal for Node operation, but sometimes 257 * it's not set?!) 258 */ 259 reg |= PCR_CIMDIS; 260 261 /* 262 * Make sure "force link good" is set to normal mode. 263 * It's only intended for debugging. 264 */ 265 reg |= PCR_FLINK100; 266 267 #if 0 268 /* 269 * Mystery bits which are supposedly `reserved', 270 * but we seem to need to set them when the PHY 271 * is connected to some interfaces! 272 */ 273 reg |= 0x0100 | 0x0400; 274 #endif 275 /* 276 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 277 */ 278 switch (IFM_SUBTYPE(ife->ifm_media)) { 279 case IFM_AUTO: 280 /* 281 * If we're already in auto mode, just return. 282 */ 283 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 284 return (0); 285 (void) mii_phy_auto(sc, 1); 286 break; 287 case IFM_100_T4: 288 /* 289 * XXX Not supported as a manual setting right now. 290 */ 291 return (EINVAL); 292 default: 293 /* 294 * BMCR data is stored in the ifmedia entry. 295 */ 296 PHY_WRITE(sc, MII_ANAR, 297 mii_anar(ife->ifm_media)); 298 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 299 } 300 break; 301 302 case MII_TICK: 303 /* 304 * If we're not currently selected, just return. 305 */ 306 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 307 return (0); 308 309 /* 310 * Only used for autonegotiation. 311 */ 312 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 313 return (0); 314 315 /* 316 * Is the interface even up? 317 */ 318 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 319 return (0); 320 321 /* 322 * Check to see if we have link. If we do, we don't 323 * need to restart the autonegotiation process. Read 324 * the BMSR twice in case it's latched. 325 */ 326 reg = PHY_READ(sc, MII_BMSR) | 327 PHY_READ(sc, MII_BMSR); 328 if (reg & BMSR_LINK) 329 return (0); 330 331 /* 332 * Only retry autonegotiation every 5 seconds. 333 */ 334 if (++sc->mii_ticks != 5) 335 return (0); 336 337 sc->mii_ticks = 0; 338 mii_phy_reset(sc); 339 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 340 return (0); 341 break; 342 } 343 344 /* Update the media status. */ 345 nsphy_status(sc); 346 347 /* Callback if something changed. */ 348 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 349 MIIBUS_STATCHG(sc->mii_dev); 350 sc->mii_active = mii->mii_media_active; 351 } 352 return (0); 353 } 354 355 void 356 nsphy_status(sc) 357 struct mii_softc *sc; 358 { 359 struct mii_data *mii = sc->mii_pdata; 360 int bmsr, bmcr, par, anlpar; 361 362 mii->mii_media_status = IFM_AVALID; 363 mii->mii_media_active = IFM_ETHER; 364 365 bmsr = PHY_READ(sc, MII_BMSR) | 366 PHY_READ(sc, MII_BMSR); 367 if (bmsr & BMSR_LINK) 368 mii->mii_media_status |= IFM_ACTIVE; 369 370 bmcr = PHY_READ(sc, MII_BMCR); 371 if (bmcr & BMCR_ISO) { 372 mii->mii_media_active |= IFM_NONE; 373 mii->mii_media_status = 0; 374 return; 375 } 376 377 if (bmcr & BMCR_LOOP) 378 mii->mii_media_active |= IFM_LOOP; 379 380 if (bmcr & BMCR_AUTOEN) { 381 /* 382 * The PAR status bits are only valid of autonegotiation 383 * has completed (or it's disabled). 384 */ 385 if ((bmsr & BMSR_ACOMP) == 0) { 386 /* Erg, still trying, I guess... */ 387 mii->mii_media_active |= IFM_NONE; 388 return; 389 } 390 391 /* 392 * Argh. The PAR doesn't seem to indicate duplex mode 393 * properly! Determine media based on link partner's 394 * advertised capabilities. 395 */ 396 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 397 anlpar = PHY_READ(sc, MII_ANAR) & 398 PHY_READ(sc, MII_ANLPAR); 399 if (anlpar & ANLPAR_T4) 400 mii->mii_media_active |= IFM_100_T4; 401 else if (anlpar & ANLPAR_TX_FD) 402 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 403 else if (anlpar & ANLPAR_TX) 404 mii->mii_media_active |= IFM_100_TX; 405 else if (anlpar & ANLPAR_10_FD) 406 mii->mii_media_active |= IFM_10_T|IFM_FDX; 407 else if (anlpar & ANLPAR_10) 408 mii->mii_media_active |= IFM_10_T; 409 else 410 mii->mii_media_active |= IFM_NONE; 411 return; 412 } 413 414 /* 415 * Link partner is not capable of autonegotiation. 416 * We will never be in full-duplex mode if this is 417 * the case, so reading the PAR is OK. 418 */ 419 par = PHY_READ(sc, MII_NSPHY_PAR); 420 if (par & PAR_10) 421 mii->mii_media_active |= IFM_10_T; 422 else 423 mii->mii_media_active |= IFM_100_TX; 424 #if 0 425 if (par & PAR_FDX) 426 mii->mii_media_active |= IFM_FDX; 427 #endif 428 } else 429 mii->mii_media_active = mii_media_from_bmcr(bmcr); 430 } 431