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 1.8 2005/12/11 01:54:08 swildner 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 123 nsphy_probe(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 139 nsphy_attach(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, ma); 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_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(sc, sc->mii_capabilities); 186 printf("\n"); 187 #undef ADD 188 189 MIIBUS_MEDIAINIT(sc->mii_dev); 190 return(0); 191 } 192 193 static int 194 nsphy_detach(device_t dev) 195 { 196 struct mii_softc *sc; 197 struct mii_data *mii; 198 199 sc = device_get_softc(dev); 200 mii = device_get_softc(device_get_parent(dev)); 201 mii_phy_auto_stop(sc); 202 sc->mii_dev = NULL; 203 LIST_REMOVE(sc, mii_list); 204 205 return(0); 206 } 207 208 int 209 nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 210 { 211 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 212 int reg; 213 214 switch (cmd) { 215 case MII_POLLSTAT: 216 /* 217 * If we're not polling our PHY instance, just return. 218 */ 219 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 220 return (0); 221 break; 222 223 case MII_MEDIACHG: 224 /* 225 * If the media indicates a different PHY instance, 226 * isolate ourselves. 227 */ 228 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 229 reg = PHY_READ(sc, MII_BMCR); 230 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 231 return (0); 232 } 233 234 /* 235 * If the interface is not up, don't do anything. 236 */ 237 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 238 break; 239 240 reg = PHY_READ(sc, MII_NSPHY_PCR); 241 242 /* 243 * Set up the PCR to use LED4 to indicate full-duplex 244 * in both 10baseT and 100baseTX modes. 245 */ 246 reg |= PCR_LED4MODE; 247 248 /* 249 * Make sure Carrier Intgrity Monitor function is 250 * disabled (normal for Node operation, but sometimes 251 * it's not set?!) 252 */ 253 reg |= PCR_CIMDIS; 254 255 /* 256 * Make sure "force link good" is set to normal mode. 257 * It's only intended for debugging. 258 */ 259 reg |= PCR_FLINK100; 260 261 /* 262 * Mystery bits which are supposedly `reserved', 263 * but we seem to need to set them when the PHY 264 * is connected to some interfaces: 265 * 266 * 0x0400 is needed for fxp 267 * (Intel EtherExpress Pro 10+/100B, 82557 chip) 268 * (nsphy with a DP83840 chip) 269 * 0x0100 may be needed for some other card 270 */ 271 reg |= 0x0100 | 0x0400; 272 273 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 274 "fxp") == 0) 275 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 276 277 switch (IFM_SUBTYPE(ife->ifm_media)) { 278 case IFM_AUTO: 279 /* 280 * If we're already in auto mode, just return. 281 */ 282 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 283 return (0); 284 (void) mii_phy_auto(sc, 1); 285 break; 286 case IFM_100_T4: 287 /* 288 * XXX Not supported as a manual setting right now. 289 */ 290 return (EINVAL); 291 default: 292 /* 293 * BMCR data is stored in the ifmedia entry. 294 */ 295 PHY_WRITE(sc, MII_ANAR, 296 mii_anar(ife->ifm_media)); 297 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 298 } 299 break; 300 301 case MII_TICK: 302 /* 303 * If we're not currently selected, just return. 304 */ 305 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 306 return (0); 307 308 /* 309 * Only used for autonegotiation. 310 */ 311 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 312 return (0); 313 314 /* 315 * Is the interface even up? 316 */ 317 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 318 return (0); 319 320 /* 321 * Check to see if we have link. If we do, we don't 322 * need to restart the autonegotiation process. Read 323 * the BMSR twice in case it's latched. 324 */ 325 reg = PHY_READ(sc, MII_BMSR) | 326 PHY_READ(sc, MII_BMSR); 327 if (reg & BMSR_LINK) 328 return (0); 329 330 /* 331 * Only retry autonegotiation every 5 seconds. 332 */ 333 if (++sc->mii_ticks != 5) 334 return (0); 335 336 sc->mii_ticks = 0; 337 mii_phy_reset(sc); 338 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 339 return (0); 340 break; 341 } 342 343 /* Update the media status. */ 344 nsphy_status(sc); 345 346 /* Callback if something changed. */ 347 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 348 MIIBUS_STATCHG(sc->mii_dev); 349 sc->mii_active = mii->mii_media_active; 350 } 351 return (0); 352 } 353 354 void 355 nsphy_status(struct mii_softc *sc) 356 { 357 struct mii_data *mii = sc->mii_pdata; 358 int bmsr, bmcr, par, anlpar; 359 360 mii->mii_media_status = IFM_AVALID; 361 mii->mii_media_active = IFM_ETHER; 362 363 bmsr = PHY_READ(sc, MII_BMSR) | 364 PHY_READ(sc, MII_BMSR); 365 if (bmsr & BMSR_LINK) 366 mii->mii_media_status |= IFM_ACTIVE; 367 368 bmcr = PHY_READ(sc, MII_BMCR); 369 if (bmcr & BMCR_ISO) { 370 mii->mii_media_active |= IFM_NONE; 371 mii->mii_media_status = 0; 372 return; 373 } 374 375 if (bmcr & BMCR_LOOP) 376 mii->mii_media_active |= IFM_LOOP; 377 378 if (bmcr & BMCR_AUTOEN) { 379 /* 380 * The PAR status bits are only valid of autonegotiation 381 * has completed (or it's disabled). 382 */ 383 if ((bmsr & BMSR_ACOMP) == 0) { 384 /* Erg, still trying, I guess... */ 385 mii->mii_media_active |= IFM_NONE; 386 return; 387 } 388 389 /* 390 * Argh. The PAR doesn't seem to indicate duplex mode 391 * properly! Determine media based on link partner's 392 * advertised capabilities. 393 */ 394 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 395 anlpar = PHY_READ(sc, MII_ANAR) & 396 PHY_READ(sc, MII_ANLPAR); 397 if (anlpar & ANLPAR_T4) 398 mii->mii_media_active |= IFM_100_T4; 399 else if (anlpar & ANLPAR_TX_FD) 400 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 401 else if (anlpar & ANLPAR_TX) 402 mii->mii_media_active |= IFM_100_TX; 403 else if (anlpar & ANLPAR_10_FD) 404 mii->mii_media_active |= IFM_10_T|IFM_FDX; 405 else if (anlpar & ANLPAR_10) 406 mii->mii_media_active |= IFM_10_T; 407 else 408 mii->mii_media_active |= IFM_NONE; 409 return; 410 } 411 412 /* 413 * Link partner is not capable of autonegotiation. 414 * We will never be in full-duplex mode if this is 415 * the case, so reading the PAR is OK. 416 */ 417 par = PHY_READ(sc, MII_NSPHY_PAR); 418 if (par & PAR_10) 419 mii->mii_media_active |= IFM_10_T; 420 else 421 mii->mii_media_active |= IFM_100_TX; 422 #if 0 423 if (par & PAR_FDX) 424 mii->mii_media_active |= IFM_FDX; 425 #endif 426 } else 427 mii->mii_media_active |= mii_media_from_bmcr(bmcr); 428 } 429