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) 94 static const char rcsid[] = 95 "$FreeBSD$"; 96 #endif 97 98 static int nsphy_probe(device_t); 99 static int nsphy_attach(device_t); 100 101 static 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 }; 109 110 static devclass_t nsphy_devclass; 111 112 static driver_t nsphy_driver = { 113 "nsphy", 114 nsphy_methods, 115 sizeof(struct mii_softc) 116 }; 117 118 DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0); 119 120 static int nsphy_service(struct mii_softc *, struct mii_data *, int); 121 static void nsphy_status(struct mii_softc *); 122 123 static int 124 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 } 139 140 static int 141 nsphy_attach(dev) 142 device_t dev; 143 { 144 struct mii_softc *sc; 145 struct mii_attach_args *ma; 146 struct mii_data *mii; 147 148 sc = device_get_softc(dev); 149 ma = device_get_ivars(dev); 150 sc->mii_dev = device_get_parent(dev); 151 mii = device_get_softc(sc->mii_dev); 152 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 153 154 sc->mii_inst = mii->mii_instance; 155 sc->mii_phy = ma->mii_phyno; 156 sc->mii_service = nsphy_service; 157 sc->mii_pdata = mii; 158 159 #ifdef foo 160 /* 161 * i82557 wedges if all of its PHYs are isolated! 162 */ 163 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 164 "fxp") == 0 && mii->mii_instance == 0) 165 #endif 166 167 sc->mii_flags |= MIIF_NOISOLATE; 168 mii->mii_instance++; 169 170 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 171 172 #if 0 173 /* Can't do this on the i82557! */ 174 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 175 BMCR_ISO); 176 #endif 177 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 178 BMCR_LOOP|BMCR_S100); 179 180 mii_phy_reset(sc); 181 182 sc->mii_capabilities = 183 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 184 device_printf(dev, " "); 185 mii_add_media(sc); 186 printf("\n"); 187 #undef ADD 188 189 MIIBUS_MEDIAINIT(sc->mii_dev); 190 return(0); 191 } 192 193 static int 194 nsphy_service(sc, mii, cmd) 195 struct mii_softc *sc; 196 struct mii_data *mii; 197 int cmd; 198 { 199 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 200 int reg; 201 202 switch (cmd) { 203 case MII_POLLSTAT: 204 /* 205 * If we're not polling our PHY instance, just return. 206 */ 207 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 208 return (0); 209 break; 210 211 case MII_MEDIACHG: 212 /* 213 * If the media indicates a different PHY instance, 214 * isolate ourselves. 215 */ 216 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 217 reg = PHY_READ(sc, MII_BMCR); 218 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 219 return (0); 220 } 221 222 /* 223 * If the interface is not up, don't do anything. 224 */ 225 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 226 break; 227 228 reg = PHY_READ(sc, MII_NSPHY_PCR); 229 230 /* 231 * Set up the PCR to use LED4 to indicate full-duplex 232 * in both 10baseT and 100baseTX modes. 233 */ 234 reg |= PCR_LED4MODE; 235 236 /* 237 * Make sure Carrier Intgrity Monitor function is 238 * disabled (normal for Node operation, but sometimes 239 * it's not set?!) 240 */ 241 reg |= PCR_CIMDIS; 242 243 /* 244 * Make sure "force link good" is set to normal mode. 245 * It's only intended for debugging. 246 */ 247 reg |= PCR_FLINK100; 248 249 /* 250 * Mystery bits which are supposedly `reserved', 251 * but we seem to need to set them when the PHY 252 * is connected to some interfaces: 253 * 254 * 0x0400 is needed for fxp 255 * (Intel EtherExpress Pro 10+/100B, 82557 chip) 256 * (nsphy with a DP83840 chip) 257 * 0x0100 may be needed for some other card 258 */ 259 reg |= 0x0100 | 0x0400; 260 261 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 262 "fxp") == 0) 263 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 264 265 switch (IFM_SUBTYPE(ife->ifm_media)) { 266 case IFM_AUTO: 267 /* 268 * If we're already in auto mode, just return. 269 */ 270 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 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 } 307 308 static void 309 nsphy_status(sc) 310 struct mii_softc *sc; 311 { 312 struct mii_data *mii = sc->mii_pdata; 313 int bmsr, bmcr, par, anlpar; 314 315 mii->mii_media_status = IFM_AVALID; 316 mii->mii_media_active = IFM_ETHER; 317 318 bmsr = PHY_READ(sc, MII_BMSR) | 319 PHY_READ(sc, MII_BMSR); 320 if (bmsr & BMSR_LINK) 321 mii->mii_media_status |= IFM_ACTIVE; 322 323 bmcr = PHY_READ(sc, MII_BMCR); 324 if (bmcr & BMCR_ISO) { 325 mii->mii_media_active |= IFM_NONE; 326 mii->mii_media_status = 0; 327 return; 328 } 329 330 if (bmcr & BMCR_LOOP) 331 mii->mii_media_active |= IFM_LOOP; 332 333 if (bmcr & BMCR_AUTOEN) { 334 /* 335 * The PAR status bits are only valid of autonegotiation 336 * has completed (or it's disabled). 337 */ 338 if ((bmsr & BMSR_ACOMP) == 0) { 339 /* Erg, still trying, I guess... */ 340 mii->mii_media_active |= IFM_NONE; 341 return; 342 } 343 344 /* 345 * Argh. The PAR doesn't seem to indicate duplex mode 346 * properly! Determine media based on link partner's 347 * advertised capabilities. 348 */ 349 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 350 anlpar = PHY_READ(sc, MII_ANAR) & 351 PHY_READ(sc, MII_ANLPAR); 352 if (anlpar & ANLPAR_T4) 353 mii->mii_media_active |= IFM_100_T4; 354 else if (anlpar & ANLPAR_TX_FD) 355 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 356 else if (anlpar & ANLPAR_TX) 357 mii->mii_media_active |= IFM_100_TX; 358 else if (anlpar & ANLPAR_10_FD) 359 mii->mii_media_active |= IFM_10_T|IFM_FDX; 360 else if (anlpar & ANLPAR_10) 361 mii->mii_media_active |= IFM_10_T; 362 else 363 mii->mii_media_active |= IFM_NONE; 364 return; 365 } 366 367 /* 368 * Link partner is not capable of autonegotiation. 369 * We will never be in full-duplex mode if this is 370 * the case, so reading the PAR is OK. 371 */ 372 par = PHY_READ(sc, MII_NSPHY_PAR); 373 if (par & PAR_10) 374 mii->mii_media_active |= IFM_10_T; 375 else 376 mii->mii_media_active |= IFM_100_TX; 377 #if 0 378 if (par & PAR_FDX) 379 mii->mii_media_active |= IFM_FDX; 380 #endif 381 } else 382 mii->mii_media_active |= mii_media_from_bmcr(bmcr); 383 } 384