nsphy.c revision 1.43
1 /* $NetBSD: nsphy.c,v 1.43 2005/02/27 00:27:31 perry Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2000 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/cdefs.h> 75 __KERNEL_RCSID(0, "$NetBSD: nsphy.c,v 1.43 2005/02/27 00:27:31 perry Exp $"); 76 77 #include <sys/param.h> 78 #include <sys/systm.h> 79 #include <sys/kernel.h> 80 #include <sys/device.h> 81 #include <sys/socket.h> 82 #include <sys/errno.h> 83 84 #include <net/if.h> 85 #include <net/if_media.h> 86 87 #include <dev/mii/mii.h> 88 #include <dev/mii/miivar.h> 89 #include <dev/mii/miidevs.h> 90 91 #include <dev/mii/nsphyreg.h> 92 93 static int nsphymatch(struct device *, struct cfdata *, void *); 94 static void nsphyattach(struct device *, struct device *, void *); 95 96 CFATTACH_DECL(nsphy, sizeof(struct mii_softc), 97 nsphymatch, nsphyattach, mii_phy_detach, mii_phy_activate); 98 99 static int nsphy_service(struct mii_softc *, struct mii_data *, int); 100 static void nsphy_status(struct mii_softc *); 101 static void nsphy_reset(struct mii_softc *sc); 102 103 static const struct mii_phy_funcs nsphy_funcs = { 104 nsphy_service, nsphy_status, nsphy_reset, 105 }; 106 107 static const struct mii_phydesc nsphys[] = { 108 { MII_OUI_xxNATSEMI, MII_MODEL_xxNATSEMI_DP83840, 109 MII_STR_xxNATSEMI_DP83840 }, 110 111 { 0, 0, 112 NULL }, 113 }; 114 115 static int 116 nsphymatch(struct device *parent, struct cfdata *match, void *aux) 117 { 118 struct mii_attach_args *ma = aux; 119 120 if (mii_phy_match(ma, nsphys) != NULL) 121 return (10); 122 123 return (0); 124 } 125 126 static void 127 nsphyattach(struct device *parent, struct device *self, void *aux) 128 { 129 struct mii_softc *sc = (struct mii_softc *)self; 130 struct mii_attach_args *ma = aux; 131 struct mii_data *mii = ma->mii_data; 132 const struct mii_phydesc *mpd; 133 134 mpd = mii_phy_match(ma, nsphys); 135 aprint_naive(": Media interface\n"); 136 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 137 138 sc->mii_inst = mii->mii_instance; 139 sc->mii_phy = ma->mii_phyno; 140 sc->mii_funcs = &nsphy_funcs; 141 sc->mii_pdata = mii; 142 sc->mii_flags = ma->mii_flags; 143 sc->mii_anegticks = 5; 144 145 PHY_RESET(sc); 146 147 sc->mii_capabilities = 148 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 149 aprint_normal("%s: ", sc->mii_dev.dv_xname); 150 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 151 aprint_error("no media present"); 152 else 153 mii_phy_add_media(sc); 154 aprint_normal("\n"); 155 } 156 157 static int 158 nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 159 { 160 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 161 int reg; 162 163 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0) 164 return (ENXIO); 165 166 switch (cmd) { 167 case MII_POLLSTAT: 168 /* 169 * If we're not polling our PHY instance, just return. 170 */ 171 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 172 return (0); 173 break; 174 175 case MII_MEDIACHG: 176 /* 177 * If the media indicates a different PHY instance, 178 * isolate ourselves. 179 */ 180 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 181 reg = PHY_READ(sc, MII_BMCR); 182 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 183 return (0); 184 } 185 186 /* 187 * If the interface is not up, don't do anything. 188 */ 189 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 190 break; 191 192 reg = PHY_READ(sc, MII_NSPHY_PCR); 193 194 /* 195 * Set up the PCR to use LED4 to indicate full-duplex 196 * in both 10baseT and 100baseTX modes. 197 */ 198 reg |= PCR_LED4MODE; 199 200 /* 201 * Make sure Carrier Integrity Monitor function is 202 * disabled (normal for Node operation, but sometimes 203 * it's not set?!) 204 */ 205 reg |= PCR_CIMDIS; 206 207 /* 208 * Make sure "force link good" is set to normal mode. 209 * It's only intended for debugging. 210 */ 211 reg |= PCR_FLINK100; 212 213 /* 214 * Mystery bits which are supposedly `reserved', 215 * but we seem to need to set them when the PHY 216 * is connected to some interfaces: 217 * 218 * 0x0400 is needed for fxp 219 * (Intel EtherExpress Pro 10+/100B, 82557 chip) 220 * (nsphy with a DP83840 chip) 221 * 0x0100 may be needed for some other card 222 */ 223 reg |= 0x0100 | 0x0400; 224 225 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 226 227 mii_phy_setmedia(sc); 228 break; 229 230 case MII_TICK: 231 /* 232 * If we're not currently selected, just return. 233 */ 234 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 235 return (0); 236 237 if (mii_phy_tick(sc) == EJUSTRETURN) 238 return (0); 239 break; 240 241 case MII_DOWN: 242 mii_phy_down(sc); 243 return (0); 244 } 245 246 /* Update the media status. */ 247 mii_phy_status(sc); 248 249 /* Callback if something changed. */ 250 mii_phy_update(sc, cmd); 251 return (0); 252 } 253 254 static void 255 nsphy_status(struct mii_softc *sc) 256 { 257 struct mii_data *mii = sc->mii_pdata; 258 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 259 int bmsr, bmcr, par, anlpar; 260 261 mii->mii_media_status = IFM_AVALID; 262 mii->mii_media_active = IFM_ETHER; 263 264 bmsr = PHY_READ(sc, MII_BMSR) | 265 PHY_READ(sc, MII_BMSR); 266 if (bmsr & BMSR_LINK) 267 mii->mii_media_status |= IFM_ACTIVE; 268 269 bmcr = PHY_READ(sc, MII_BMCR); 270 if (bmcr & BMCR_ISO) { 271 mii->mii_media_active |= IFM_NONE; 272 mii->mii_media_status = 0; 273 return; 274 } 275 276 if (bmcr & BMCR_LOOP) 277 mii->mii_media_active |= IFM_LOOP; 278 279 if (bmcr & BMCR_AUTOEN) { 280 /* 281 * The PAR status bits are only valid of autonegotiation 282 * has completed (or it's disabled). 283 */ 284 if ((bmsr & BMSR_ACOMP) == 0) { 285 /* Erg, still trying, I guess... */ 286 mii->mii_media_active |= IFM_NONE; 287 return; 288 } 289 290 /* 291 * Argh. The PAR doesn't seem to indicate duplex mode 292 * properly! Determine media based on link partner's 293 * advertised capabilities. 294 */ 295 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 296 anlpar = PHY_READ(sc, MII_ANAR) & 297 PHY_READ(sc, MII_ANLPAR); 298 if (anlpar & ANLPAR_T4) 299 mii->mii_media_active |= IFM_100_T4; 300 else if (anlpar & ANLPAR_TX_FD) 301 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 302 else if (anlpar & ANLPAR_TX) 303 mii->mii_media_active |= IFM_100_TX; 304 else if (anlpar & ANLPAR_10_FD) 305 mii->mii_media_active |= IFM_10_T|IFM_FDX; 306 else if (anlpar & ANLPAR_10) 307 mii->mii_media_active |= IFM_10_T; 308 else 309 mii->mii_media_active |= IFM_NONE; 310 return; 311 } 312 313 /* 314 * Link partner is not capable of autonegotiation. 315 * We will never be in full-duplex mode if this is 316 * the case, so reading the PAR is OK. 317 */ 318 par = PHY_READ(sc, MII_NSPHY_PAR); 319 if (par & PAR_10) 320 mii->mii_media_active |= IFM_10_T; 321 else 322 mii->mii_media_active |= IFM_100_TX; 323 #if 0 324 if (par & PAR_FDX) 325 mii->mii_media_active |= IFM_FDX; 326 #endif 327 } else 328 mii->mii_media_active = ife->ifm_media; 329 } 330 331 static void 332 nsphy_reset(struct mii_softc *sc) 333 { 334 int reg, i; 335 336 if (sc->mii_flags & MIIF_NOISOLATE) 337 reg = BMCR_RESET; 338 else 339 reg = BMCR_RESET | BMCR_ISO; 340 PHY_WRITE(sc, MII_BMCR, reg); 341 342 /* 343 * Give it a little time to settle in case we just got power. 344 * The DP83840A data sheet suggests that a soft reset not happen 345 * within 500us of power being applied. Be conservative. 346 */ 347 delay(1000); 348 349 /* 350 * Wait another 2s for it to complete. 351 * This is only a little overkill as under normal circumstances 352 * the PHY can take up to 1s to complete reset. 353 * This is also a bit odd because after a reset, the BMCR will 354 * clear the reset bit and simply reports 0 even though the reset 355 * is not yet complete. 356 */ 357 for (i = 0; i < 1000; i++) { 358 reg = PHY_READ(sc, MII_BMCR); 359 if (reg && ((reg & BMCR_RESET) == 0)) 360 break; 361 delay(2000); 362 } 363 364 if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) { 365 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 366 } 367 } 368
Indexes created Wed Oct 22 13:09:56 GMT 2025