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 1.5 2004/09/18 19:32:59 dillon 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 mii_softc_init(sc); 148 sc->mii_dev = device_get_parent(dev); 149 mii = device_get_softc(sc->mii_dev); 150 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 151 152 sc->mii_inst = mii->mii_instance; 153 sc->mii_phy = ma->mii_phyno; 154 sc->mii_service = nsphy_service; 155 sc->mii_pdata = mii; 156 157 #ifdef foo 158 /* 159 * i82557 wedges if all of its PHYs are isolated! 160 */ 161 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 162 "fxp") == 0 && mii->mii_instance == 0) 163 #endif 164 165 sc->mii_flags |= MIIF_NOISOLATE; 166 mii->mii_instance++; 167 168 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 169 170 #if 0 171 /* Can't do this on the i82557! */ 172 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 173 BMCR_ISO); 174 #endif 175 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 176 BMCR_LOOP|BMCR_S100); 177 178 mii_phy_reset(sc); 179 180 sc->mii_capabilities = 181 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 182 device_printf(dev, " "); 183 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 184 printf("no media present"); 185 else 186 mii_add_media(mii, sc->mii_capabilities, 187 sc->mii_inst); 188 printf("\n"); 189 #undef ADD 190 191 MIIBUS_MEDIAINIT(sc->mii_dev); 192 return(0); 193 } 194 195 static int nsphy_detach(dev) 196 device_t dev; 197 { 198 struct mii_softc *sc; 199 struct mii_data *mii; 200 201 sc = device_get_softc(dev); 202 mii = device_get_softc(device_get_parent(dev)); 203 mii_phy_auto_stop(sc); 204 sc->mii_dev = NULL; 205 LIST_REMOVE(sc, mii_list); 206 207 return(0); 208 } 209 210 int 211 nsphy_service(sc, mii, cmd) 212 struct mii_softc *sc; 213 struct mii_data *mii; 214 int cmd; 215 { 216 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 217 int reg; 218 219 switch (cmd) { 220 case MII_POLLSTAT: 221 /* 222 * If we're not polling our PHY instance, just return. 223 */ 224 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 225 return (0); 226 break; 227 228 case MII_MEDIACHG: 229 /* 230 * If the media indicates a different PHY instance, 231 * isolate ourselves. 232 */ 233 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 234 reg = PHY_READ(sc, MII_BMCR); 235 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 236 return (0); 237 } 238 239 /* 240 * If the interface is not up, don't do anything. 241 */ 242 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 243 break; 244 245 reg = PHY_READ(sc, MII_NSPHY_PCR); 246 247 /* 248 * Set up the PCR to use LED4 to indicate full-duplex 249 * in both 10baseT and 100baseTX modes. 250 */ 251 reg |= PCR_LED4MODE; 252 253 /* 254 * Make sure Carrier Intgrity Monitor function is 255 * disabled (normal for Node operation, but sometimes 256 * it's not set?!) 257 */ 258 reg |= PCR_CIMDIS; 259 260 /* 261 * Make sure "force link good" is set to normal mode. 262 * It's only intended for debugging. 263 */ 264 reg |= PCR_FLINK100; 265 266 /* 267 * Mystery bits which are supposedly `reserved', 268 * but we seem to need to set them when the PHY 269 * is connected to some interfaces: 270 * 271 * 0x0400 is needed for fxp 272 * (Intel EtherExpress Pro 10+/100B, 82557 chip) 273 * (nsphy with a DP83840 chip) 274 * 0x0100 may be needed for some other card 275 */ 276 reg |= 0x0100 | 0x0400; 277 278 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 279 "fxp") == 0) 280 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 281 282 switch (IFM_SUBTYPE(ife->ifm_media)) { 283 case IFM_AUTO: 284 /* 285 * If we're already in auto mode, just return. 286 */ 287 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 288 return (0); 289 (void) mii_phy_auto(sc, 1); 290 break; 291 case IFM_100_T4: 292 /* 293 * XXX Not supported as a manual setting right now. 294 */ 295 return (EINVAL); 296 default: 297 /* 298 * BMCR data is stored in the ifmedia entry. 299 */ 300 PHY_WRITE(sc, MII_ANAR, 301 mii_anar(ife->ifm_media)); 302 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 303 } 304 break; 305 306 case MII_TICK: 307 /* 308 * If we're not currently selected, just return. 309 */ 310 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 311 return (0); 312 313 /* 314 * Only used for autonegotiation. 315 */ 316 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 317 return (0); 318 319 /* 320 * Is the interface even up? 321 */ 322 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 323 return (0); 324 325 /* 326 * Check to see if we have link. If we do, we don't 327 * need to restart the autonegotiation process. Read 328 * the BMSR twice in case it's latched. 329 */ 330 reg = PHY_READ(sc, MII_BMSR) | 331 PHY_READ(sc, MII_BMSR); 332 if (reg & BMSR_LINK) 333 return (0); 334 335 /* 336 * Only retry autonegotiation every 5 seconds. 337 */ 338 if (++sc->mii_ticks != 5) 339 return (0); 340 341 sc->mii_ticks = 0; 342 mii_phy_reset(sc); 343 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 344 return (0); 345 break; 346 } 347 348 /* Update the media status. */ 349 nsphy_status(sc); 350 351 /* Callback if something changed. */ 352 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 353 MIIBUS_STATCHG(sc->mii_dev); 354 sc->mii_active = mii->mii_media_active; 355 } 356 return (0); 357 } 358 359 void 360 nsphy_status(sc) 361 struct mii_softc *sc; 362 { 363 struct mii_data *mii = sc->mii_pdata; 364 int bmsr, bmcr, par, anlpar; 365 366 mii->mii_media_status = IFM_AVALID; 367 mii->mii_media_active = IFM_ETHER; 368 369 bmsr = PHY_READ(sc, MII_BMSR) | 370 PHY_READ(sc, MII_BMSR); 371 if (bmsr & BMSR_LINK) 372 mii->mii_media_status |= IFM_ACTIVE; 373 374 bmcr = PHY_READ(sc, MII_BMCR); 375 if (bmcr & BMCR_ISO) { 376 mii->mii_media_active |= IFM_NONE; 377 mii->mii_media_status = 0; 378 return; 379 } 380 381 if (bmcr & BMCR_LOOP) 382 mii->mii_media_active |= IFM_LOOP; 383 384 if (bmcr & BMCR_AUTOEN) { 385 /* 386 * The PAR status bits are only valid of autonegotiation 387 * has completed (or it's disabled). 388 */ 389 if ((bmsr & BMSR_ACOMP) == 0) { 390 /* Erg, still trying, I guess... */ 391 mii->mii_media_active |= IFM_NONE; 392 return; 393 } 394 395 /* 396 * Argh. The PAR doesn't seem to indicate duplex mode 397 * properly! Determine media based on link partner's 398 * advertised capabilities. 399 */ 400 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 401 anlpar = PHY_READ(sc, MII_ANAR) & 402 PHY_READ(sc, MII_ANLPAR); 403 if (anlpar & ANLPAR_T4) 404 mii->mii_media_active |= IFM_100_T4; 405 else if (anlpar & ANLPAR_TX_FD) 406 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 407 else if (anlpar & ANLPAR_TX) 408 mii->mii_media_active |= IFM_100_TX; 409 else if (anlpar & ANLPAR_10_FD) 410 mii->mii_media_active |= IFM_10_T|IFM_FDX; 411 else if (anlpar & ANLPAR_10) 412 mii->mii_media_active |= IFM_10_T; 413 else 414 mii->mii_media_active |= IFM_NONE; 415 return; 416 } 417 418 /* 419 * Link partner is not capable of autonegotiation. 420 * We will never be in full-duplex mode if this is 421 * the case, so reading the PAR is OK. 422 */ 423 par = PHY_READ(sc, MII_NSPHY_PAR); 424 if (par & PAR_10) 425 mii->mii_media_active |= IFM_10_T; 426 else 427 mii->mii_media_active |= IFM_100_TX; 428 #if 0 429 if (par & PAR_FDX) 430 mii->mii_media_active |= IFM_FDX; 431 #endif 432 } else 433 mii->mii_media_active |= mii_media_from_bmcr(bmcr); 434 } 435