Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/nsphy.c
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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("$FreeBSD$"); 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 96 static int nsphy_probe(device_t); 97 static int nsphy_attach(device_t); 98 99 static 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 }; 107 108 static devclass_t nsphy_devclass; 109 110 static driver_t nsphy_driver = { 111 "nsphy", 112 nsphy_methods, 113 sizeof(struct mii_softc) 114 }; 115 116 DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0); 117 118 static int nsphy_service(struct mii_softc *, struct mii_data *, int); 119 static void nsphy_status(struct mii_softc *); 120 121 static int 122 nsphy_probe(dev) 123 device_t dev; 124 { 125 struct mii_attach_args *ma; 126 127 ma = device_get_ivars(dev); 128 129 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI && 130 MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) { 131 device_set_desc(dev, MII_STR_NATSEMI_DP83840); 132 } else 133 return (ENXIO); 134 135 return (0); 136 } 137 138 static int 139 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 } 190 191 static int 192 nsphy_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 device_t parent; 200 201 switch (cmd) { 202 case MII_POLLSTAT: 203 /* 204 * If we're not polling our PHY instance, just return. 205 */ 206 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 207 return (0); 208 break; 209 210 case MII_MEDIACHG: 211 /* 212 * If the media indicates a different PHY instance, 213 * isolate ourselves. 214 */ 215 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 216 reg = PHY_READ(sc, MII_BMCR); 217 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 218 return (0); 219 } 220 221 /* 222 * If the interface is not up, don't do anything. 223 */ 224 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 225 break; 226 227 parent = device_get_parent(sc->mii_dev); 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 Integrity 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(parent), "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 and don't hang off 269 * of a hme(4), just return. DP83840A on hme(4) don't 270 * advertise their media capabilities themselves 271 * properly so force writing the ANAR according to 272 * the BMSR by mii_phy_auto() every time. 273 */ 274 if ((PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) == 0 && 275 strcmp(device_get_name(parent), "hme") != 0) 276 return (0); 277 (void) mii_phy_auto(sc); 278 break; 279 case IFM_100_T4: 280 /* 281 * XXX Not supported as a manual setting right now. 282 */ 283 return (EINVAL); 284 default: 285 /* 286 * BMCR data is stored in the ifmedia entry. 287 */ 288 PHY_WRITE(sc, MII_ANAR, 289 mii_anar(ife->ifm_media)); 290 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 291 } 292 break; 293 294 case MII_TICK: 295 /* 296 * If we're not currently selected, just return. 297 */ 298 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 299 return (0); 300 if (mii_phy_tick(sc) == EJUSTRETURN) 301 return (0); 302 break; 303 } 304 305 /* Update the media status. */ 306 nsphy_status(sc); 307 308 /* Callback if something changed. */ 309 mii_phy_update(sc, cmd); 310 return (0); 311 } 312 313 static void 314 nsphy_status(sc) 315 struct mii_softc *sc; 316 { 317 struct mii_data *mii = sc->mii_pdata; 318 int bmsr, bmcr, par, anlpar; 319 320 mii->mii_media_status = IFM_AVALID; 321 mii->mii_media_active = IFM_ETHER; 322 323 bmsr = PHY_READ(sc, MII_BMSR) | 324 PHY_READ(sc, MII_BMSR); 325 if (bmsr & BMSR_LINK) 326 mii->mii_media_status |= IFM_ACTIVE; 327 328 bmcr = PHY_READ(sc, MII_BMCR); 329 if (bmcr & BMCR_ISO) { 330 mii->mii_media_active |= IFM_NONE; 331 mii->mii_media_status = 0; 332 return; 333 } 334 335 if (bmcr & BMCR_LOOP) 336 mii->mii_media_active |= IFM_LOOP; 337 338 if (bmcr & BMCR_AUTOEN) { 339 /* 340 * The PAR status bits are only valid of autonegotiation 341 * has completed (or it's disabled). 342 */ 343 if ((bmsr & BMSR_ACOMP) == 0) { 344 /* Erg, still trying, I guess... */ 345 mii->mii_media_active |= IFM_NONE; 346 return; 347 } 348 349 /* 350 * Argh. The PAR doesn't seem to indicate duplex mode 351 * properly! Determine media based on link partner's 352 * advertised capabilities. 353 */ 354 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 355 anlpar = PHY_READ(sc, MII_ANAR) & 356 PHY_READ(sc, MII_ANLPAR); 357 if (anlpar & ANLPAR_T4) 358 mii->mii_media_active |= IFM_100_T4; 359 else if (anlpar & ANLPAR_TX_FD) 360 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 361 else if (anlpar & ANLPAR_TX) 362 mii->mii_media_active |= IFM_100_TX; 363 else if (anlpar & ANLPAR_10_FD) 364 mii->mii_media_active |= IFM_10_T|IFM_FDX; 365 else if (anlpar & ANLPAR_10) 366 mii->mii_media_active |= IFM_10_T; 367 else 368 mii->mii_media_active |= IFM_NONE; 369 return; 370 } 371 372 /* 373 * Link partner is not capable of autonegotiation. 374 * We will never be in full-duplex mode if this is 375 * the case, so reading the PAR is OK. 376 */ 377 par = PHY_READ(sc, MII_NSPHY_PAR); 378 if (par & PAR_10) 379 mii->mii_media_active |= IFM_10_T; 380 else 381 mii->mii_media_active |= IFM_100_TX; 382 #if 0 383 if (par & PAR_FDX) 384 mii->mii_media_active |= IFM_FDX; 385 #endif 386 } else 387 mii->mii_media_active |= mii_media_from_bmcr(bmcr); 388 }
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