nsphy.c revision 119418
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#include <sys/cdefs.h> 41__FBSDID("$FreeBSD: head/sys/dev/mii/nsphy.c 119418 2003-08-24 17:55:58Z obrien $"); 42 43/* 44 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by Manuel Bouyer. 57 * 4. The name of the author may not be used to endorse or promote products 58 * derived from this software without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 61 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 62 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 63 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 64 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 65 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 66 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 67 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 68 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 69 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 70 */ 71 72/* 73 * driver for National Semiconductor's DP83840A ethernet 10/100 PHY 74 * Data Sheet available from www.national.com 75 */ 76 77#include <sys/cdefs.h> 78__FBSDID("$FreeBSD: head/sys/dev/mii/nsphy.c 119418 2003-08-24 17:55:58Z obrien $"); 79 80#include <sys/param.h> 81#include <sys/systm.h> 82#include <sys/kernel.h> 83#include <sys/socket.h> 84#include <sys/errno.h> 85#include <sys/module.h> 86#include <sys/bus.h> 87 88#include <net/if.h> 89#include <net/if_media.h> 90 91#include <dev/mii/mii.h> 92#include <dev/mii/miivar.h> 93#include "miidevs.h" 94 95#include <dev/mii/nsphyreg.h> 96 97#include "miibus_if.h" 98 99static int nsphy_probe(device_t); 100static int nsphy_attach(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, mii_phy_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 125nsphy_probe(dev) 126 device_t dev; 127{ 128 struct mii_attach_args *ma; 129 130 ma = device_get_ivars(dev); 131 132 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI && 133 MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) { 134 device_set_desc(dev, MII_STR_NATSEMI_DP83840); 135 } else 136 return (ENXIO); 137 138 return (0); 139} 140 141static int 142nsphy_attach(dev) 143 device_t dev; 144{ 145 struct mii_softc *sc; 146 struct mii_attach_args *ma; 147 struct mii_data *mii; 148 149 sc = device_get_softc(dev); 150 ma = device_get_ivars(dev); 151 sc->mii_dev = device_get_parent(dev); 152 mii = device_get_softc(sc->mii_dev); 153 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 154 155 sc->mii_inst = mii->mii_instance; 156 sc->mii_phy = ma->mii_phyno; 157 sc->mii_service = nsphy_service; 158 sc->mii_pdata = mii; 159 160#ifdef foo 161 /* 162 * i82557 wedges if all of its PHYs are isolated! 163 */ 164 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 165 "fxp") == 0 && mii->mii_instance == 0) 166#endif 167 168 sc->mii_flags |= MIIF_NOISOLATE; 169 mii->mii_instance++; 170 171#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 172 173#if 0 174 /* Can't do this on the i82557! */ 175 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 176 BMCR_ISO); 177#endif 178 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 179 BMCR_LOOP|BMCR_S100); 180 181 mii_phy_reset(sc); 182 183 sc->mii_capabilities = 184 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 185 device_printf(dev, " "); 186 mii_add_media(sc); 187 printf("\n"); 188#undef ADD 189 190 MIIBUS_MEDIAINIT(sc->mii_dev); 191 return(0); 192} 193 194static int 195nsphy_service(sc, mii, cmd) 196 struct mii_softc *sc; 197 struct mii_data *mii; 198 int cmd; 199{ 200 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 201 int reg; 202 203 switch (cmd) { 204 case MII_POLLSTAT: 205 /* 206 * If we're not polling our PHY instance, just return. 207 */ 208 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 209 return (0); 210 break; 211 212 case MII_MEDIACHG: 213 /* 214 * If the media indicates a different PHY instance, 215 * isolate ourselves. 216 */ 217 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 218 reg = PHY_READ(sc, MII_BMCR); 219 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 220 return (0); 221 } 222 223 /* 224 * If the interface is not up, don't do anything. 225 */ 226 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 227 break; 228 229 reg = PHY_READ(sc, MII_NSPHY_PCR); 230 231 /* 232 * Set up the PCR to use LED4 to indicate full-duplex 233 * in both 10baseT and 100baseTX modes. 234 */ 235 reg |= PCR_LED4MODE; 236 237 /* 238 * Make sure Carrier Intgrity Monitor function is 239 * disabled (normal for Node operation, but sometimes 240 * it's not set?!) 241 */ 242 reg |= PCR_CIMDIS; 243 244 /* 245 * Make sure "force link good" is set to normal mode. 246 * It's only intended for debugging. 247 */ 248 reg |= PCR_FLINK100; 249 250 /* 251 * Mystery bits which are supposedly `reserved', 252 * but we seem to need to set them when the PHY 253 * is connected to some interfaces: 254 * 255 * 0x0400 is needed for fxp 256 * (Intel EtherExpress Pro 10+/100B, 82557 chip) 257 * (nsphy with a DP83840 chip) 258 * 0x0100 may be needed for some other card 259 */ 260 reg |= 0x0100 | 0x0400; 261 262 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 263 "fxp") == 0) 264 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 265 266 switch (IFM_SUBTYPE(ife->ifm_media)) { 267 case IFM_AUTO: 268 /* 269 * If we're already in auto mode, just return. 270 */ 271 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 272 return (0); 273 (void) mii_phy_auto(sc); 274 break; 275 case IFM_100_T4: 276 /* 277 * XXX Not supported as a manual setting right now. 278 */ 279 return (EINVAL); 280 default: 281 /* 282 * BMCR data is stored in the ifmedia entry. 283 */ 284 PHY_WRITE(sc, MII_ANAR, 285 mii_anar(ife->ifm_media)); 286 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 287 } 288 break; 289 290 case MII_TICK: 291 /* 292 * If we're not currently selected, just return. 293 */ 294 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 295 return (0); 296 if (mii_phy_tick(sc) == EJUSTRETURN) 297 return (0); 298 break; 299 } 300 301 /* Update the media status. */ 302 nsphy_status(sc); 303 304 /* Callback if something changed. */ 305 mii_phy_update(sc, cmd); 306 return (0); 307} 308 309static void 310nsphy_status(sc) 311 struct mii_softc *sc; 312{ 313 struct mii_data *mii = sc->mii_pdata; 314 int bmsr, bmcr, par, anlpar; 315 316 mii->mii_media_status = IFM_AVALID; 317 mii->mii_media_active = IFM_ETHER; 318 319 bmsr = PHY_READ(sc, MII_BMSR) | 320 PHY_READ(sc, MII_BMSR); 321 if (bmsr & BMSR_LINK) 322 mii->mii_media_status |= IFM_ACTIVE; 323 324 bmcr = PHY_READ(sc, MII_BMCR); 325 if (bmcr & BMCR_ISO) { 326 mii->mii_media_active |= IFM_NONE; 327 mii->mii_media_status = 0; 328 return; 329 } 330 331 if (bmcr & BMCR_LOOP) 332 mii->mii_media_active |= IFM_LOOP; 333 334 if (bmcr & BMCR_AUTOEN) { 335 /* 336 * The PAR status bits are only valid of autonegotiation 337 * has completed (or it's disabled). 338 */ 339 if ((bmsr & BMSR_ACOMP) == 0) { 340 /* Erg, still trying, I guess... */ 341 mii->mii_media_active |= IFM_NONE; 342 return; 343 } 344 345 /* 346 * Argh. The PAR doesn't seem to indicate duplex mode 347 * properly! Determine media based on link partner's 348 * advertised capabilities. 349 */ 350 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 351 anlpar = PHY_READ(sc, MII_ANAR) & 352 PHY_READ(sc, MII_ANLPAR); 353 if (anlpar & ANLPAR_T4) 354 mii->mii_media_active |= IFM_100_T4; 355 else if (anlpar & ANLPAR_TX_FD) 356 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 357 else if (anlpar & ANLPAR_TX) 358 mii->mii_media_active |= IFM_100_TX; 359 else if (anlpar & ANLPAR_10_FD) 360 mii->mii_media_active |= IFM_10_T|IFM_FDX; 361 else if (anlpar & ANLPAR_10) 362 mii->mii_media_active |= IFM_10_T; 363 else 364 mii->mii_media_active |= IFM_NONE; 365 return; 366 } 367 368 /* 369 * Link partner is not capable of autonegotiation. 370 * We will never be in full-duplex mode if this is 371 * the case, so reading the PAR is OK. 372 */ 373 par = PHY_READ(sc, MII_NSPHY_PAR); 374 if (par & PAR_10) 375 mii->mii_media_active |= IFM_10_T; 376 else 377 mii->mii_media_active |= IFM_100_TX; 378#if 0 379 if (par & PAR_FDX) 380 mii->mii_media_active |= IFM_FDX; 381#endif 382 } else 383 mii->mii_media_active |= mii_media_from_bmcr(bmcr); 384} 385