nsphy.c revision 96026
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 96026 2002-05-04 11:00:30Z phk $"; 96#endif 97 98static int nsphy_probe (device_t); 99static int nsphy_attach (device_t); 100 101static device_method_t nsphy_methods[] = { 102 /* device interface */ 103 DEVMETHOD(device_probe, nsphy_probe), 104 DEVMETHOD(device_attach, nsphy_attach), 105 DEVMETHOD(device_detach, mii_phy_detach), 106 DEVMETHOD(device_shutdown, bus_generic_shutdown), 107 { 0, 0 } 108}; 109 110static devclass_t nsphy_devclass; 111 112static driver_t nsphy_driver = { 113 "nsphy", 114 nsphy_methods, 115 sizeof(struct mii_softc) 116}; 117 118DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0); 119 120static int nsphy_service(struct mii_softc *, struct mii_data *, int); 121static void nsphy_status(struct mii_softc *); 122 123static int nsphy_probe(dev) 124 device_t dev; 125{ 126 struct mii_attach_args *ma; 127 128 ma = device_get_ivars(dev); 129 130 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI && 131 MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) { 132 device_set_desc(dev, MII_STR_NATSEMI_DP83840); 133 } else 134 return (ENXIO); 135 136 return (0); 137} 138 139static int nsphy_attach(dev) 140 device_t dev; 141{ 142 struct mii_softc *sc; 143 struct mii_attach_args *ma; 144 struct mii_data *mii; 145 146 sc = device_get_softc(dev); 147 ma = device_get_ivars(dev); 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 mii_add_media(sc); 184 printf("\n"); 185#undef ADD 186 187 MIIBUS_MEDIAINIT(sc->mii_dev); 188 return(0); 189} 190 191static int 192nsphy_service(sc, mii, cmd) 193 struct mii_softc *sc; 194 struct mii_data *mii; 195 int cmd; 196{ 197 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 198 int reg; 199 200 switch (cmd) { 201 case MII_POLLSTAT: 202 /* 203 * If we're not polling our PHY instance, just return. 204 */ 205 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 206 return (0); 207 break; 208 209 case MII_MEDIACHG: 210 /* 211 * If the media indicates a different PHY instance, 212 * isolate ourselves. 213 */ 214 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 215 reg = PHY_READ(sc, MII_BMCR); 216 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 217 return (0); 218 } 219 220 /* 221 * If the interface is not up, don't do anything. 222 */ 223 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 224 break; 225 226 reg = PHY_READ(sc, MII_NSPHY_PCR); 227 228 /* 229 * Set up the PCR to use LED4 to indicate full-duplex 230 * in both 10baseT and 100baseTX modes. 231 */ 232 reg |= PCR_LED4MODE; 233 234 /* 235 * Make sure Carrier Intgrity Monitor function is 236 * disabled (normal for Node operation, but sometimes 237 * it's not set?!) 238 */ 239 reg |= PCR_CIMDIS; 240 241 /* 242 * Make sure "force link good" is set to normal mode. 243 * It's only intended for debugging. 244 */ 245 reg |= PCR_FLINK100; 246 247 /* 248 * Mystery bits which are supposedly `reserved', 249 * but we seem to need to set them when the PHY 250 * is connected to some interfaces: 251 * 252 * 0x0400 is needed for fxp 253 * (Intel EtherExpress Pro 10+/100B, 82557 chip) 254 * (nsphy with a DP83840 chip) 255 * 0x0100 may be needed for some other card 256 */ 257 reg |= 0x0100 | 0x0400; 258 259 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 260 "fxp") == 0) 261 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 262 263 switch (IFM_SUBTYPE(ife->ifm_media)) { 264 case IFM_AUTO: 265 /* 266 * If we're already in auto mode, just return. 267 */ 268 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 269 return (0); 270 (void) mii_phy_auto(sc); 271 break; 272 case IFM_100_T4: 273 /* 274 * XXX Not supported as a manual setting right now. 275 */ 276 return (EINVAL); 277 default: 278 /* 279 * BMCR data is stored in the ifmedia entry. 280 */ 281 PHY_WRITE(sc, MII_ANAR, 282 mii_anar(ife->ifm_media)); 283 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 284 } 285 break; 286 287 case MII_TICK: 288 /* 289 * If we're not currently selected, just return. 290 */ 291 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 292 return (0); 293 if (mii_phy_tick(sc) == EJUSTRETURN) 294 return (0); 295 break; 296 } 297 298 /* Update the media status. */ 299 nsphy_status(sc); 300 301 /* Callback if something changed. */ 302 mii_phy_update(sc, cmd); 303 return (0); 304} 305 306static void 307nsphy_status(sc) 308 struct mii_softc *sc; 309{ 310 struct mii_data *mii = sc->mii_pdata; 311 int bmsr, bmcr, par, anlpar; 312 313 mii->mii_media_status = IFM_AVALID; 314 mii->mii_media_active = IFM_ETHER; 315 316 bmsr = PHY_READ(sc, MII_BMSR) | 317 PHY_READ(sc, MII_BMSR); 318 if (bmsr & BMSR_LINK) 319 mii->mii_media_status |= IFM_ACTIVE; 320 321 bmcr = PHY_READ(sc, MII_BMCR); 322 if (bmcr & BMCR_ISO) { 323 mii->mii_media_active |= IFM_NONE; 324 mii->mii_media_status = 0; 325 return; 326 } 327 328 if (bmcr & BMCR_LOOP) 329 mii->mii_media_active |= IFM_LOOP; 330 331 if (bmcr & BMCR_AUTOEN) { 332 /* 333 * The PAR status bits are only valid of autonegotiation 334 * has completed (or it's disabled). 335 */ 336 if ((bmsr & BMSR_ACOMP) == 0) { 337 /* Erg, still trying, I guess... */ 338 mii->mii_media_active |= IFM_NONE; 339 return; 340 } 341 342 /* 343 * Argh. The PAR doesn't seem to indicate duplex mode 344 * properly! Determine media based on link partner's 345 * advertised capabilities. 346 */ 347 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 348 anlpar = PHY_READ(sc, MII_ANAR) & 349 PHY_READ(sc, MII_ANLPAR); 350 if (anlpar & ANLPAR_T4) 351 mii->mii_media_active |= IFM_100_T4; 352 else if (anlpar & ANLPAR_TX_FD) 353 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 354 else if (anlpar & ANLPAR_TX) 355 mii->mii_media_active |= IFM_100_TX; 356 else if (anlpar & ANLPAR_10_FD) 357 mii->mii_media_active |= IFM_10_T|IFM_FDX; 358 else if (anlpar & ANLPAR_10) 359 mii->mii_media_active |= IFM_10_T; 360 else 361 mii->mii_media_active |= IFM_NONE; 362 return; 363 } 364 365 /* 366 * Link partner is not capable of autonegotiation. 367 * We will never be in full-duplex mode if this is 368 * the case, so reading the PAR is OK. 369 */ 370 par = PHY_READ(sc, MII_NSPHY_PAR); 371 if (par & PAR_10) 372 mii->mii_media_active |= IFM_10_T; 373 else 374 mii->mii_media_active |= IFM_100_TX; 375#if 0 376 if (par & PAR_FDX) 377 mii->mii_media_active |= IFM_FDX; 378#endif 379 } else 380 mii->mii_media_active |= mii_media_from_bmcr(bmcr); 381} 382