nsphy.c revision 150763
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#include <sys/cdefs.h> 70__FBSDID("$FreeBSD: head/sys/dev/mii/nsphy.c 150763 2005-09-30 19:39:27Z imp $"); 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 <dev/mii/mii.h> 89#include <dev/mii/miivar.h> 90#include "miidevs.h" 91 92#include <dev/mii/nsphyreg.h> 93 94#include "miibus_if.h" 95 96static int nsphy_probe(device_t); 97static int nsphy_attach(device_t); 98 99static device_method_t nsphy_methods[] = { 100 /* device interface */ 101 DEVMETHOD(device_probe, nsphy_probe), 102 DEVMETHOD(device_attach, nsphy_attach), 103 DEVMETHOD(device_detach, mii_phy_detach), 104 DEVMETHOD(device_shutdown, bus_generic_shutdown), 105 { 0, 0 } 106}; 107 108static devclass_t nsphy_devclass; 109 110static driver_t nsphy_driver = { 111 "nsphy", 112 nsphy_methods, 113 sizeof(struct mii_softc) 114}; 115 116DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0); 117 118static int nsphy_service(struct mii_softc *, struct mii_data *, int); 119static void nsphy_status(struct mii_softc *); 120 121static int 122nsphy_probe(device_t dev) 123{ 124 struct mii_attach_args *ma; 125 126 ma = device_get_ivars(dev); 127 128 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI && 129 MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) { 130 device_set_desc(dev, MII_STR_NATSEMI_DP83840); 131 } else 132 return (ENXIO); 133 134 return (0); 135} 136 137static int 138nsphy_attach(device_t dev) 139{ 140 struct mii_softc *sc; 141 struct mii_attach_args *ma; 142 struct mii_data *mii; 143 144 sc = device_get_softc(dev); 145 ma = device_get_ivars(dev); 146 sc->mii_dev = device_get_parent(dev); 147 mii = device_get_softc(sc->mii_dev); 148 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 149 150 sc->mii_inst = mii->mii_instance; 151 sc->mii_phy = ma->mii_phyno; 152 sc->mii_service = nsphy_service; 153 sc->mii_pdata = mii; 154 155#ifdef foo 156 /* 157 * i82557 wedges if all of its PHYs are isolated! 158 */ 159 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 160 "fxp") == 0 && mii->mii_instance == 0) 161#endif 162 163 sc->mii_flags |= MIIF_NOISOLATE; 164 mii->mii_instance++; 165 166#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 167 168#if 0 169 /* Can't do this on the i82557! */ 170 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 171 BMCR_ISO); 172#endif 173 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 174 BMCR_LOOP|BMCR_S100); 175 176 mii_phy_reset(sc); 177 178 sc->mii_capabilities = 179 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 180 device_printf(dev, " "); 181 mii_add_media(sc); 182 printf("\n"); 183#undef ADD 184 185 MIIBUS_MEDIAINIT(sc->mii_dev); 186 return(0); 187} 188 189static int 190nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 191{ 192 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 193 int reg; 194 device_t parent; 195 196 switch (cmd) { 197 case MII_POLLSTAT: 198 /* 199 * If we're not polling our PHY instance, just return. 200 */ 201 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 202 return (0); 203 break; 204 205 case MII_MEDIACHG: 206 /* 207 * If the media indicates a different PHY instance, 208 * isolate ourselves. 209 */ 210 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 211 reg = PHY_READ(sc, MII_BMCR); 212 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 213 return (0); 214 } 215 216 /* 217 * If the interface is not up, don't do anything. 218 */ 219 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 220 break; 221 222 parent = device_get_parent(sc->mii_dev); 223 224 reg = PHY_READ(sc, MII_NSPHY_PCR); 225 226 /* 227 * Set up the PCR to use LED4 to indicate full-duplex 228 * in both 10baseT and 100baseTX modes. 229 */ 230 reg |= PCR_LED4MODE; 231 232 /* 233 * Make sure Carrier Integrity Monitor function is 234 * disabled (normal for Node operation, but sometimes 235 * it's not set?!) 236 */ 237 reg |= PCR_CIMDIS; 238 239 /* 240 * Make sure "force link good" is set to normal mode. 241 * It's only intended for debugging. 242 */ 243 reg |= PCR_FLINK100; 244 245 /* 246 * Mystery bits which are supposedly `reserved', 247 * but we seem to need to set them when the PHY 248 * is connected to some interfaces: 249 * 250 * 0x0400 is needed for fxp 251 * (Intel EtherExpress Pro 10+/100B, 82557 chip) 252 * (nsphy with a DP83840 chip) 253 * 0x0100 may be needed for some other card 254 */ 255 reg |= 0x0100 | 0x0400; 256 257 if (strcmp(device_get_name(parent), "fxp") == 0) 258 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 259 260 switch (IFM_SUBTYPE(ife->ifm_media)) { 261 case IFM_AUTO: 262 /* 263 * If we're already in auto mode and don't hang off 264 * of a hme(4), just return. DP83840A on hme(4) don't 265 * advertise their media capabilities themselves 266 * properly so force writing the ANAR according to 267 * the BMSR by mii_phy_auto() every time. 268 */ 269 if ((PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) == 0 && 270 strcmp(device_get_name(parent), "hme") != 0) 271 return (0); 272 (void) mii_phy_auto(sc); 273 break; 274 case IFM_100_T4: 275 /* 276 * XXX Not supported as a manual setting right now. 277 */ 278 return (EINVAL); 279 default: 280 /* 281 * BMCR data is stored in the ifmedia entry. 282 */ 283 PHY_WRITE(sc, MII_ANAR, 284 mii_anar(ife->ifm_media)); 285 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 286 } 287 break; 288 289 case MII_TICK: 290 /* 291 * If we're not currently selected, just return. 292 */ 293 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 294 return (0); 295 if (mii_phy_tick(sc) == EJUSTRETURN) 296 return (0); 297 break; 298 } 299 300 /* Update the media status. */ 301 nsphy_status(sc); 302 303 /* Callback if something changed. */ 304 mii_phy_update(sc, cmd); 305 return (0); 306} 307 308static void 309nsphy_status(struct mii_softc *sc) 310{ 311 struct mii_data *mii = sc->mii_pdata; 312 int bmsr, bmcr, par, anlpar; 313 314 mii->mii_media_status = IFM_AVALID; 315 mii->mii_media_active = IFM_ETHER; 316 317 bmsr = PHY_READ(sc, MII_BMSR) | 318 PHY_READ(sc, MII_BMSR); 319 if (bmsr & BMSR_LINK) 320 mii->mii_media_status |= IFM_ACTIVE; 321 322 bmcr = PHY_READ(sc, MII_BMCR); 323 if (bmcr & BMCR_ISO) { 324 mii->mii_media_active |= IFM_NONE; 325 mii->mii_media_status = 0; 326 return; 327 } 328 329 if (bmcr & BMCR_LOOP) 330 mii->mii_media_active |= IFM_LOOP; 331 332 if (bmcr & BMCR_AUTOEN) { 333 /* 334 * The PAR status bits are only valid of autonegotiation 335 * has completed (or it's disabled). 336 */ 337 if ((bmsr & BMSR_ACOMP) == 0) { 338 /* Erg, still trying, I guess... */ 339 mii->mii_media_active |= IFM_NONE; 340 return; 341 } 342 343 /* 344 * Argh. The PAR doesn't seem to indicate duplex mode 345 * properly! Determine media based on link partner's 346 * advertised capabilities. 347 */ 348 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 349 anlpar = PHY_READ(sc, MII_ANAR) & 350 PHY_READ(sc, MII_ANLPAR); 351 if (anlpar & ANLPAR_T4) 352 mii->mii_media_active |= IFM_100_T4; 353 else if (anlpar & ANLPAR_TX_FD) 354 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 355 else if (anlpar & ANLPAR_TX) 356 mii->mii_media_active |= IFM_100_TX; 357 else if (anlpar & ANLPAR_10_FD) 358 mii->mii_media_active |= IFM_10_T|IFM_FDX; 359 else if (anlpar & ANLPAR_10) 360 mii->mii_media_active |= IFM_10_T; 361 else 362 mii->mii_media_active |= IFM_NONE; 363 return; 364 } 365 366 /* 367 * Link partner is not capable of autonegotiation. 368 * We will never be in full-duplex mode if this is 369 * the case, so reading the PAR is OK. 370 */ 371 par = PHY_READ(sc, MII_NSPHY_PAR); 372 if (par & PAR_10) 373 mii->mii_media_active |= IFM_10_T; 374 else 375 mii->mii_media_active |= IFM_100_TX; 376#if 0 377 if (par & PAR_FDX) 378 mii->mii_media_active |= IFM_FDX; 379#endif 380 } else 381 mii->mii_media_active |= mii_media_from_bmcr(bmcr); 382} 383