nsphy.c revision 95667
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 95667 2002-04-28 19:25:07Z phk $"; 96#endif 97 98static int nsphy_probe (device_t); 99static int nsphy_attach (device_t); 100static int nsphy_detach (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(struct mii_softc *, struct mii_data *, int); 122static void nsphy_status(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 mii_add_media(sc); 185 printf("\n"); 186#undef ADD 187 188 MIIBUS_MEDIAINIT(sc->mii_dev); 189 return(0); 190} 191 192static int nsphy_detach(dev) 193 device_t dev; 194{ 195 struct mii_softc *sc; 196 struct mii_data *mii; 197 198 sc = device_get_softc(dev); 199 mii = device_get_softc(device_get_parent(dev)); 200 mii_phy_auto_stop(sc); 201 sc->mii_dev = NULL; 202 LIST_REMOVE(sc, mii_list); 203 204 return(0); 205} 206 207static int 208nsphy_service(sc, mii, cmd) 209 struct mii_softc *sc; 210 struct mii_data *mii; 211 int cmd; 212{ 213 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 214 int reg; 215 216 switch (cmd) { 217 case MII_POLLSTAT: 218 /* 219 * If we're not polling our PHY instance, just return. 220 */ 221 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 222 return (0); 223 break; 224 225 case MII_MEDIACHG: 226 /* 227 * If the media indicates a different PHY instance, 228 * isolate ourselves. 229 */ 230 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 231 reg = PHY_READ(sc, MII_BMCR); 232 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 233 return (0); 234 } 235 236 /* 237 * If the interface is not up, don't do anything. 238 */ 239 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 240 break; 241 242 reg = PHY_READ(sc, MII_NSPHY_PCR); 243 244 /* 245 * Set up the PCR to use LED4 to indicate full-duplex 246 * in both 10baseT and 100baseTX modes. 247 */ 248 reg |= PCR_LED4MODE; 249 250 /* 251 * Make sure Carrier Intgrity Monitor function is 252 * disabled (normal for Node operation, but sometimes 253 * it's not set?!) 254 */ 255 reg |= PCR_CIMDIS; 256 257 /* 258 * Make sure "force link good" is set to normal mode. 259 * It's only intended for debugging. 260 */ 261 reg |= PCR_FLINK100; 262 263 /* 264 * Mystery bits which are supposedly `reserved', 265 * but we seem to need to set them when the PHY 266 * is connected to some interfaces: 267 * 268 * 0x0400 is needed for fxp 269 * (Intel EtherExpress Pro 10+/100B, 82557 chip) 270 * (nsphy with a DP83840 chip) 271 * 0x0100 may be needed for some other card 272 */ 273 reg |= 0x0100 | 0x0400; 274 275 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 276 "fxp") == 0) 277 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 278 279 switch (IFM_SUBTYPE(ife->ifm_media)) { 280 case IFM_AUTO: 281 /* 282 * If we're already in auto mode, just return. 283 */ 284 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 285 return (0); 286 (void) mii_phy_auto(sc, 1); 287 break; 288 case IFM_100_T4: 289 /* 290 * XXX Not supported as a manual setting right now. 291 */ 292 return (EINVAL); 293 default: 294 /* 295 * BMCR data is stored in the ifmedia entry. 296 */ 297 PHY_WRITE(sc, MII_ANAR, 298 mii_anar(ife->ifm_media)); 299 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 300 } 301 break; 302 303 case MII_TICK: 304 /* 305 * If we're not currently selected, just return. 306 */ 307 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 308 return (0); 309 if (mii_phy_tick(sc) == EJUSTRETURN) 310 return (0); 311 break; 312 } 313 314 /* Update the media status. */ 315 nsphy_status(sc); 316 317 /* Callback if something changed. */ 318 mii_phy_update(sc, cmd); 319 return (0); 320} 321 322static void 323nsphy_status(sc) 324 struct mii_softc *sc; 325{ 326 struct mii_data *mii = sc->mii_pdata; 327 int bmsr, bmcr, par, anlpar; 328 329 mii->mii_media_status = IFM_AVALID; 330 mii->mii_media_active = IFM_ETHER; 331 332 bmsr = PHY_READ(sc, MII_BMSR) | 333 PHY_READ(sc, MII_BMSR); 334 if (bmsr & BMSR_LINK) 335 mii->mii_media_status |= IFM_ACTIVE; 336 337 bmcr = PHY_READ(sc, MII_BMCR); 338 if (bmcr & BMCR_ISO) { 339 mii->mii_media_active |= IFM_NONE; 340 mii->mii_media_status = 0; 341 return; 342 } 343 344 if (bmcr & BMCR_LOOP) 345 mii->mii_media_active |= IFM_LOOP; 346 347 if (bmcr & BMCR_AUTOEN) { 348 /* 349 * The PAR status bits are only valid of autonegotiation 350 * has completed (or it's disabled). 351 */ 352 if ((bmsr & BMSR_ACOMP) == 0) { 353 /* Erg, still trying, I guess... */ 354 mii->mii_media_active |= IFM_NONE; 355 return; 356 } 357 358 /* 359 * Argh. The PAR doesn't seem to indicate duplex mode 360 * properly! Determine media based on link partner's 361 * advertised capabilities. 362 */ 363 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 364 anlpar = PHY_READ(sc, MII_ANAR) & 365 PHY_READ(sc, MII_ANLPAR); 366 if (anlpar & ANLPAR_T4) 367 mii->mii_media_active |= IFM_100_T4; 368 else if (anlpar & ANLPAR_TX_FD) 369 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 370 else if (anlpar & ANLPAR_TX) 371 mii->mii_media_active |= IFM_100_TX; 372 else if (anlpar & ANLPAR_10_FD) 373 mii->mii_media_active |= IFM_10_T|IFM_FDX; 374 else if (anlpar & ANLPAR_10) 375 mii->mii_media_active |= IFM_10_T; 376 else 377 mii->mii_media_active |= IFM_NONE; 378 return; 379 } 380 381 /* 382 * Link partner is not capable of autonegotiation. 383 * We will never be in full-duplex mode if this is 384 * the case, so reading the PAR is OK. 385 */ 386 par = PHY_READ(sc, MII_NSPHY_PAR); 387 if (par & PAR_10) 388 mii->mii_media_active |= IFM_10_T; 389 else 390 mii->mii_media_active |= IFM_100_TX; 391#if 0 392 if (par & PAR_FDX) 393 mii->mii_media_active |= IFM_FDX; 394#endif 395 } else 396 mii->mii_media_active |= mii_media_from_bmcr(bmcr); 397} 398