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 * $FreeBSD: src/sys/dev/mii/nsphy.c,v 1.2.2.5 2001/06/08 19:58:33 semenu Exp $ 40 * $DragonFly: src/sys/dev/netif/mii_layer/nsphy.c,v 1.4 2003/08/27 09:38:31 rob Exp $ 41 */ 42 43 /* 44 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by Manuel Bouyer. 57 * 4. The name of the author may not be used to endorse or promote products 58 * derived from this software without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 61 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 62 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 63 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 64 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 65 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 66 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 67 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 68 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 69 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 70 */ 71 72 /* 73 * driver for National Semiconductor's DP83840A ethernet 10/100 PHY 74 * Data Sheet available from www.national.com 75 */ 76 77 #include <sys/param.h> 78 #include <sys/systm.h> 79 #include <sys/kernel.h> 80 #include <sys/socket.h> 81 #include <sys/errno.h> 82 #include <sys/module.h> 83 #include <sys/bus.h> 84 85 #include <net/if.h> 86 #include <net/if_media.h> 87 88 #include "mii.h" 89 #include "miivar.h" 90 #include "miidevs.h" 91 92 #include "nsphyreg.h" 93 94 #include "miibus_if.h" 95 96 static int nsphy_probe (device_t); 97 static int nsphy_attach (device_t); 98 static int nsphy_detach (device_t); 99 100 static device_method_t nsphy_methods[] = { 101 /* device interface */ 102 DEVMETHOD(device_probe, nsphy_probe), 103 DEVMETHOD(device_attach, nsphy_attach), 104 DEVMETHOD(device_detach, nsphy_detach), 105 DEVMETHOD(device_shutdown, bus_generic_shutdown), 106 { 0, 0 } 107 }; 108 109 static devclass_t nsphy_devclass; 110 111 static driver_t nsphy_driver = { 112 "nsphy", 113 nsphy_methods, 114 sizeof(struct mii_softc) 115 }; 116 117 DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0); 118 119 int nsphy_service (struct mii_softc *, struct mii_data *, int); 120 void nsphy_status (struct mii_softc *); 121 122 static int nsphy_probe(dev) 123 device_t dev; 124 { 125 struct mii_attach_args *ma; 126 127 ma = device_get_ivars(dev); 128 129 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI && 130 MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) { 131 device_set_desc(dev, MII_STR_NATSEMI_DP83840); 132 } else 133 return (ENXIO); 134 135 return (0); 136 } 137 138 static int nsphy_attach(dev) 139 device_t dev; 140 { 141 struct mii_softc *sc; 142 struct mii_attach_args *ma; 143 struct mii_data *mii; 144 145 sc = device_get_softc(dev); 146 ma = device_get_ivars(dev); 147 sc->mii_dev = device_get_parent(dev); 148 mii = device_get_softc(sc->mii_dev); 149 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 150 151 sc->mii_inst = mii->mii_instance; 152 sc->mii_phy = ma->mii_phyno; 153 sc->mii_service = nsphy_service; 154 sc->mii_pdata = mii; 155 156 #ifdef foo 157 /* 158 * i82557 wedges if all of its PHYs are isolated! 159 */ 160 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 161 "fxp") == 0 && mii->mii_instance == 0) 162 #endif 163 164 sc->mii_flags |= MIIF_NOISOLATE; 165 mii->mii_instance++; 166 167 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 168 169 #if 0 170 /* Can't do this on the i82557! */ 171 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 172 BMCR_ISO); 173 #endif 174 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 175 BMCR_LOOP|BMCR_S100); 176 177 mii_phy_reset(sc); 178 179 sc->mii_capabilities = 180 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 181 device_printf(dev, " "); 182 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 183 printf("no media present"); 184 else 185 mii_add_media(mii, sc->mii_capabilities, 186 sc->mii_inst); 187 printf("\n"); 188 #undef ADD 189 190 MIIBUS_MEDIAINIT(sc->mii_dev); 191 return(0); 192 } 193 194 static int nsphy_detach(dev) 195 device_t dev; 196 { 197 struct mii_softc *sc; 198 struct mii_data *mii; 199 200 sc = device_get_softc(dev); 201 mii = device_get_softc(device_get_parent(dev)); 202 mii_phy_auto_stop(sc); 203 sc->mii_dev = NULL; 204 LIST_REMOVE(sc, mii_list); 205 206 return(0); 207 } 208 209 int 210 nsphy_service(sc, mii, cmd) 211 struct mii_softc *sc; 212 struct mii_data *mii; 213 int cmd; 214 { 215 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 216 int reg; 217 218 switch (cmd) { 219 case MII_POLLSTAT: 220 /* 221 * If we're not polling our PHY instance, just return. 222 */ 223 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 224 return (0); 225 break; 226 227 case MII_MEDIACHG: 228 /* 229 * If the media indicates a different PHY instance, 230 * isolate ourselves. 231 */ 232 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 233 reg = PHY_READ(sc, MII_BMCR); 234 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 235 return (0); 236 } 237 238 /* 239 * If the interface is not up, don't do anything. 240 */ 241 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 242 break; 243 244 reg = PHY_READ(sc, MII_NSPHY_PCR); 245 246 /* 247 * Set up the PCR to use LED4 to indicate full-duplex 248 * in both 10baseT and 100baseTX modes. 249 */ 250 reg |= PCR_LED4MODE; 251 252 /* 253 * Make sure Carrier Intgrity Monitor function is 254 * disabled (normal for Node operation, but sometimes 255 * it's not set?!) 256 */ 257 reg |= PCR_CIMDIS; 258 259 /* 260 * Make sure "force link good" is set to normal mode. 261 * It's only intended for debugging. 262 */ 263 reg |= PCR_FLINK100; 264 265 /* 266 * Mystery bits which are supposedly `reserved', 267 * but we seem to need to set them when the PHY 268 * is connected to some interfaces: 269 * 270 * 0x0400 is needed for fxp 271 * (Intel EtherExpress Pro 10+/100B, 82557 chip) 272 * (nsphy with a DP83840 chip) 273 * 0x0100 may be needed for some other card 274 */ 275 reg |= 0x0100 | 0x0400; 276 277 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 278 "fxp") == 0) 279 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 280 281 switch (IFM_SUBTYPE(ife->ifm_media)) { 282 case IFM_AUTO: 283 /* 284 * If we're already in auto mode, just return. 285 */ 286 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 287 return (0); 288 (void) mii_phy_auto(sc, 1); 289 break; 290 case IFM_100_T4: 291 /* 292 * XXX Not supported as a manual setting right now. 293 */ 294 return (EINVAL); 295 default: 296 /* 297 * BMCR data is stored in the ifmedia entry. 298 */ 299 PHY_WRITE(sc, MII_ANAR, 300 mii_anar(ife->ifm_media)); 301 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 302 } 303 break; 304 305 case MII_TICK: 306 /* 307 * If we're not currently selected, just return. 308 */ 309 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 310 return (0); 311 312 /* 313 * Only used for autonegotiation. 314 */ 315 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 316 return (0); 317 318 /* 319 * Is the interface even up? 320 */ 321 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 322 return (0); 323 324 /* 325 * Check to see if we have link. If we do, we don't 326 * need to restart the autonegotiation process. Read 327 * the BMSR twice in case it's latched. 328 */ 329 reg = PHY_READ(sc, MII_BMSR) | 330 PHY_READ(sc, MII_BMSR); 331 if (reg & BMSR_LINK) 332 return (0); 333 334 /* 335 * Only retry autonegotiation every 5 seconds. 336 */ 337 if (++sc->mii_ticks != 5) 338 return (0); 339 340 sc->mii_ticks = 0; 341 mii_phy_reset(sc); 342 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 343 return (0); 344 break; 345 } 346 347 /* Update the media status. */ 348 nsphy_status(sc); 349 350 /* Callback if something changed. */ 351 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 352 MIIBUS_STATCHG(sc->mii_dev); 353 sc->mii_active = mii->mii_media_active; 354 } 355 return (0); 356 } 357 358 void 359 nsphy_status(sc) 360 struct mii_softc *sc; 361 { 362 struct mii_data *mii = sc->mii_pdata; 363 int bmsr, bmcr, par, anlpar; 364 365 mii->mii_media_status = IFM_AVALID; 366 mii->mii_media_active = IFM_ETHER; 367 368 bmsr = PHY_READ(sc, MII_BMSR) | 369 PHY_READ(sc, MII_BMSR); 370 if (bmsr & BMSR_LINK) 371 mii->mii_media_status |= IFM_ACTIVE; 372 373 bmcr = PHY_READ(sc, MII_BMCR); 374 if (bmcr & BMCR_ISO) { 375 mii->mii_media_active |= IFM_NONE; 376 mii->mii_media_status = 0; 377 return; 378 } 379 380 if (bmcr & BMCR_LOOP) 381 mii->mii_media_active |= IFM_LOOP; 382 383 if (bmcr & BMCR_AUTOEN) { 384 /* 385 * The PAR status bits are only valid of autonegotiation 386 * has completed (or it's disabled). 387 */ 388 if ((bmsr & BMSR_ACOMP) == 0) { 389 /* Erg, still trying, I guess... */ 390 mii->mii_media_active |= IFM_NONE; 391 return; 392 } 393 394 /* 395 * Argh. The PAR doesn't seem to indicate duplex mode 396 * properly! Determine media based on link partner's 397 * advertised capabilities. 398 */ 399 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 400 anlpar = PHY_READ(sc, MII_ANAR) & 401 PHY_READ(sc, MII_ANLPAR); 402 if (anlpar & ANLPAR_T4) 403 mii->mii_media_active |= IFM_100_T4; 404 else if (anlpar & ANLPAR_TX_FD) 405 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 406 else if (anlpar & ANLPAR_TX) 407 mii->mii_media_active |= IFM_100_TX; 408 else if (anlpar & ANLPAR_10_FD) 409 mii->mii_media_active |= IFM_10_T|IFM_FDX; 410 else if (anlpar & ANLPAR_10) 411 mii->mii_media_active |= IFM_10_T; 412 else 413 mii->mii_media_active |= IFM_NONE; 414 return; 415 } 416 417 /* 418 * Link partner is not capable of autonegotiation. 419 * We will never be in full-duplex mode if this is 420 * the case, so reading the PAR is OK. 421 */ 422 par = PHY_READ(sc, MII_NSPHY_PAR); 423 if (par & PAR_10) 424 mii->mii_media_active |= IFM_10_T; 425 else 426 mii->mii_media_active |= IFM_100_TX; 427 #if 0 428 if (par & PAR_FDX) 429 mii->mii_media_active |= IFM_FDX; 430 #endif 431 } else 432 mii->mii_media_active |= mii_media_from_bmcr(bmcr); 433 } 434