nsphy.c revision 84145
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/socket.h> 78#include <sys/errno.h> 79#include <sys/module.h> 80#include <sys/bus.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 91#include "miibus_if.h" 92 93#if !defined(lint) 94static const char rcsid[] = 95 "$FreeBSD: head/sys/dev/mii/nsphy.c 84145 2001-09-29 19:18:52Z jlemon $"; 96#endif 97 98static int nsphy_probe __P((device_t)); 99static int nsphy_attach __P((device_t)); 100static int nsphy_detach __P((device_t)); 101 102static device_method_t nsphy_methods[] = { 103 /* device interface */ 104 DEVMETHOD(device_probe, nsphy_probe), 105 DEVMETHOD(device_attach, nsphy_attach), 106 DEVMETHOD(device_detach, nsphy_detach), 107 DEVMETHOD(device_shutdown, bus_generic_shutdown), 108 { 0, 0 } 109}; 110 111static devclass_t nsphy_devclass; 112 113static driver_t nsphy_driver = { 114 "nsphy", 115 nsphy_methods, 116 sizeof(struct mii_softc) 117}; 118 119DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0); 120 121static int nsphy_service __P((struct mii_softc *, struct mii_data *, int)); 122static void nsphy_status __P((struct mii_softc *)); 123 124static int nsphy_probe(dev) 125 device_t dev; 126{ 127 struct mii_attach_args *ma; 128 129 ma = device_get_ivars(dev); 130 131 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI && 132 MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) { 133 device_set_desc(dev, MII_STR_NATSEMI_DP83840); 134 } else 135 return (ENXIO); 136 137 return (0); 138} 139 140static int nsphy_attach(dev) 141 device_t dev; 142{ 143 struct mii_softc *sc; 144 struct mii_attach_args *ma; 145 struct mii_data *mii; 146 147 sc = device_get_softc(dev); 148 ma = device_get_ivars(dev); 149 sc->mii_dev = device_get_parent(dev); 150 mii = device_get_softc(sc->mii_dev); 151 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 152 153 sc->mii_inst = mii->mii_instance; 154 sc->mii_phy = ma->mii_phyno; 155 sc->mii_service = nsphy_service; 156 sc->mii_pdata = mii; 157 158#ifdef foo 159 /* 160 * i82557 wedges if all of its PHYs are isolated! 161 */ 162 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 163 "fxp") == 0 && mii->mii_instance == 0) 164#endif 165 166 sc->mii_flags |= MIIF_NOISOLATE; 167 mii->mii_instance++; 168 169#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 170 171#if 0 172 /* Can't do this on the i82557! */ 173 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 174 BMCR_ISO); 175#endif 176 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 177 BMCR_LOOP|BMCR_S100); 178 179 mii_phy_reset(sc); 180 181 sc->mii_capabilities = 182 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 183 device_printf(dev, " "); 184 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 185 printf("no media present"); 186 else 187 mii_add_media(mii, sc->mii_capabilities, 188 sc->mii_inst); 189 printf("\n"); 190#undef ADD 191 192 MIIBUS_MEDIAINIT(sc->mii_dev); 193 return(0); 194} 195 196static int nsphy_detach(dev) 197 device_t dev; 198{ 199 struct mii_softc *sc; 200 struct mii_data *mii; 201 202 sc = device_get_softc(dev); 203 mii = device_get_softc(device_get_parent(dev)); 204 mii_phy_auto_stop(sc); 205 sc->mii_dev = NULL; 206 LIST_REMOVE(sc, mii_list); 207 208 return(0); 209} 210 211static int 212nsphy_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 /* 268 * Mystery bits which are supposedly `reserved', 269 * but we seem to need to set them when the PHY 270 * is connected to some interfaces: 271 * 272 * 0x0400 is needed for fxp 273 * (Intel EtherExpress Pro 10+/100B, 82557 chip) 274 * (nsphy with a DP83840 chip) 275 * 0x0100 may be needed for some other card 276 */ 277 reg |= 0x0100 | 0x0400; 278 279 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 280 "fxp") == 0) 281 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 282 283 switch (IFM_SUBTYPE(ife->ifm_media)) { 284 case IFM_AUTO: 285 /* 286 * If we're already in auto mode, just return. 287 */ 288 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 289 return (0); 290 (void) mii_phy_auto(sc, 1); 291 break; 292 case IFM_100_T4: 293 /* 294 * XXX Not supported as a manual setting right now. 295 */ 296 return (EINVAL); 297 default: 298 /* 299 * BMCR data is stored in the ifmedia entry. 300 */ 301 PHY_WRITE(sc, MII_ANAR, 302 mii_anar(ife->ifm_media)); 303 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 304 } 305 break; 306 307 case MII_TICK: 308 /* 309 * If we're not currently selected, just return. 310 */ 311 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 312 return (0); 313 if (mii_phy_tick(sc) == EJUSTRETURN) 314 return (0); 315 break; 316 } 317 318 /* Update the media status. */ 319 nsphy_status(sc); 320 321 /* Callback if something changed. */ 322 mii_phy_update(sc, cmd); 323 return (0); 324} 325 326static void 327nsphy_status(sc) 328 struct mii_softc *sc; 329{ 330 struct mii_data *mii = sc->mii_pdata; 331 int bmsr, bmcr, par, anlpar; 332 333 mii->mii_media_status = IFM_AVALID; 334 mii->mii_media_active = IFM_ETHER; 335 336 bmsr = PHY_READ(sc, MII_BMSR) | 337 PHY_READ(sc, MII_BMSR); 338 if (bmsr & BMSR_LINK) 339 mii->mii_media_status |= IFM_ACTIVE; 340 341 bmcr = PHY_READ(sc, MII_BMCR); 342 if (bmcr & BMCR_ISO) { 343 mii->mii_media_active |= IFM_NONE; 344 mii->mii_media_status = 0; 345 return; 346 } 347 348 if (bmcr & BMCR_LOOP) 349 mii->mii_media_active |= IFM_LOOP; 350 351 if (bmcr & BMCR_AUTOEN) { 352 /* 353 * The PAR status bits are only valid of autonegotiation 354 * has completed (or it's disabled). 355 */ 356 if ((bmsr & BMSR_ACOMP) == 0) { 357 /* Erg, still trying, I guess... */ 358 mii->mii_media_active |= IFM_NONE; 359 return; 360 } 361 362 /* 363 * Argh. The PAR doesn't seem to indicate duplex mode 364 * properly! Determine media based on link partner's 365 * advertised capabilities. 366 */ 367 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 368 anlpar = PHY_READ(sc, MII_ANAR) & 369 PHY_READ(sc, MII_ANLPAR); 370 if (anlpar & ANLPAR_T4) 371 mii->mii_media_active |= IFM_100_T4; 372 else if (anlpar & ANLPAR_TX_FD) 373 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 374 else if (anlpar & ANLPAR_TX) 375 mii->mii_media_active |= IFM_100_TX; 376 else if (anlpar & ANLPAR_10_FD) 377 mii->mii_media_active |= IFM_10_T|IFM_FDX; 378 else if (anlpar & ANLPAR_10) 379 mii->mii_media_active |= IFM_10_T; 380 else 381 mii->mii_media_active |= IFM_NONE; 382 return; 383 } 384 385 /* 386 * Link partner is not capable of autonegotiation. 387 * We will never be in full-duplex mode if this is 388 * the case, so reading the PAR is OK. 389 */ 390 par = PHY_READ(sc, MII_NSPHY_PAR); 391 if (par & PAR_10) 392 mii->mii_media_active |= IFM_10_T; 393 else 394 mii->mii_media_active |= IFM_100_TX; 395#if 0 396 if (par & PAR_FDX) 397 mii->mii_media_active |= IFM_FDX; 398#endif 399 } else 400 mii->mii_media_active |= mii_media_from_bmcr(bmcr); 401} 402