nsphy.c revision 1.55
1 /* $NetBSD: nsphy.c,v 1.55 2008/11/17 03:04:27 dyoung 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by Manuel Bouyer. 47 * 4. The name of the author may not be used to endorse or promote products 48 * derived from this software without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 51 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 52 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 53 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 54 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 55 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 59 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 60 */ 61 62 /* 63 * driver for National Semiconductor's DP83840A ethernet 10/100 PHY 64 * Data Sheet available from www.national.com 65 */ 66 67 #include <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: nsphy.c,v 1.55 2008/11/17 03:04:27 dyoung Exp $"); 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/kernel.h> 73 #include <sys/device.h> 74 #include <sys/socket.h> 75 #include <sys/errno.h> 76 77 #include <net/if.h> 78 #include <net/if_media.h> 79 80 #include <dev/mii/mii.h> 81 #include <dev/mii/miivar.h> 82 #include <dev/mii/miidevs.h> 83 84 #include <dev/mii/nsphyreg.h> 85 86 static int nsphymatch(device_t, cfdata_t, void *); 87 static void nsphyattach(device_t, device_t, void *); 88 89 CFATTACH_DECL_NEW(nsphy, sizeof(struct mii_softc), 90 nsphymatch, nsphyattach, mii_phy_detach, mii_phy_activate); 91 92 static int nsphy_service(struct mii_softc *, struct mii_data *, int); 93 static void nsphy_status(struct mii_softc *); 94 static void nsphy_reset(struct mii_softc *sc); 95 96 static const struct mii_phy_funcs nsphy_funcs = { 97 nsphy_service, nsphy_status, nsphy_reset, 98 }; 99 100 static const struct mii_phydesc nsphys[] = { 101 { MII_OUI_xxNATSEMI, MII_MODEL_xxNATSEMI_DP83840, 102 MII_STR_xxNATSEMI_DP83840 }, 103 104 { 0, 0, 105 NULL }, 106 }; 107 108 static int 109 nsphymatch(device_t parent, cfdata_t match, void *aux) 110 { 111 struct mii_attach_args *ma = aux; 112 113 if (mii_phy_match(ma, nsphys) != NULL) 114 return (10); 115 116 return (0); 117 } 118 119 static void 120 nsphyattach(device_t parent, device_t self, void *aux) 121 { 122 struct mii_softc *sc = device_private(self); 123 struct mii_attach_args *ma = aux; 124 struct mii_data *mii = ma->mii_data; 125 const struct mii_phydesc *mpd; 126 127 mpd = mii_phy_match(ma, nsphys); 128 aprint_naive(": Media interface\n"); 129 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 130 131 sc->mii_dev = self; 132 sc->mii_inst = mii->mii_instance; 133 sc->mii_phy = ma->mii_phyno; 134 sc->mii_funcs = &nsphy_funcs; 135 sc->mii_pdata = mii; 136 sc->mii_flags = ma->mii_flags; 137 sc->mii_anegticks = MII_ANEGTICKS; 138 139 PHY_RESET(sc); 140 141 sc->mii_capabilities = 142 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 143 aprint_normal_dev(self, ""); 144 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 145 aprint_error("no media present"); 146 else 147 mii_phy_add_media(sc); 148 aprint_normal("\n"); 149 } 150 151 static int 152 nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 153 { 154 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 155 int reg; 156 157 switch (cmd) { 158 case MII_POLLSTAT: 159 /* 160 * If we're not polling our PHY instance, just return. 161 */ 162 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 163 return (0); 164 break; 165 166 case MII_MEDIACHG: 167 /* 168 * If the media indicates a different PHY instance, 169 * isolate ourselves. 170 */ 171 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 172 reg = PHY_READ(sc, MII_BMCR); 173 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 174 return (0); 175 } 176 177 /* 178 * If the interface is not up, don't do anything. 179 */ 180 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 181 break; 182 183 reg = PHY_READ(sc, MII_NSPHY_PCR); 184 185 /* 186 * Set up the PCR to use LED4 to indicate full-duplex 187 * in both 10baseT and 100baseTX modes. 188 */ 189 reg |= PCR_LED4MODE; 190 191 /* 192 * Make sure Carrier Integrity Monitor function is 193 * disabled (normal for Node operation, but sometimes 194 * it's not set?!) 195 */ 196 reg |= PCR_CIMDIS; 197 198 /* 199 * Make sure "force link good" is set to normal mode. 200 * It's only intended for debugging. 201 */ 202 reg |= PCR_FLINK100; 203 204 /* 205 * Mystery bits which are supposedly `reserved', 206 * but we seem to need to set them when the PHY 207 * is connected to some interfaces: 208 * 209 * 0x0400 is needed for fxp 210 * (Intel EtherExpress Pro 10+/100B, 82557 chip) 211 * (nsphy with a DP83840 chip) 212 * 0x0100 may be needed for some other card 213 */ 214 reg |= 0x0100 | 0x0400; 215 216 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 217 218 mii_phy_setmedia(sc); 219 break; 220 221 case MII_TICK: 222 /* 223 * If we're not currently selected, just return. 224 */ 225 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 226 return (0); 227 228 if (mii_phy_tick(sc) == EJUSTRETURN) 229 return (0); 230 break; 231 232 case MII_DOWN: 233 mii_phy_down(sc); 234 return (0); 235 } 236 237 /* Update the media status. */ 238 mii_phy_status(sc); 239 240 /* Callback if something changed. */ 241 mii_phy_update(sc, cmd); 242 return (0); 243 } 244 245 static void 246 nsphy_status(struct mii_softc *sc) 247 { 248 struct mii_data *mii = sc->mii_pdata; 249 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 250 int bmsr, bmcr, par, anlpar; 251 252 mii->mii_media_status = IFM_AVALID; 253 mii->mii_media_active = IFM_ETHER; 254 255 bmsr = PHY_READ(sc, MII_BMSR) | 256 PHY_READ(sc, MII_BMSR); 257 if (bmsr & BMSR_LINK) 258 mii->mii_media_status |= IFM_ACTIVE; 259 260 bmcr = PHY_READ(sc, MII_BMCR); 261 if (bmcr & BMCR_ISO) { 262 mii->mii_media_active |= IFM_NONE; 263 mii->mii_media_status = 0; 264 return; 265 } 266 267 if (bmcr & BMCR_LOOP) 268 mii->mii_media_active |= IFM_LOOP; 269 270 if (bmcr & BMCR_AUTOEN) { 271 /* 272 * The PAR status bits are only valid of autonegotiation 273 * has completed (or it's disabled). 274 */ 275 if ((bmsr & BMSR_ACOMP) == 0) { 276 /* Erg, still trying, I guess... */ 277 mii->mii_media_active |= IFM_NONE; 278 return; 279 } 280 281 /* 282 * Argh. The PAR doesn't seem to indicate duplex mode 283 * properly! Determine media based on link partner's 284 * advertised capabilities. 285 */ 286 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 287 anlpar = PHY_READ(sc, MII_ANAR) & 288 PHY_READ(sc, MII_ANLPAR); 289 if (anlpar & ANLPAR_T4) 290 mii->mii_media_active |= IFM_100_T4; 291 else if (anlpar & ANLPAR_TX_FD) 292 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 293 else if (anlpar & ANLPAR_TX) 294 mii->mii_media_active |= IFM_100_TX; 295 else if (anlpar & ANLPAR_10_FD) 296 mii->mii_media_active |= IFM_10_T|IFM_FDX; 297 else if (anlpar & ANLPAR_10) 298 mii->mii_media_active |= IFM_10_T; 299 else 300 mii->mii_media_active |= IFM_NONE; 301 return; 302 } 303 304 /* 305 * Link partner is not capable of autonegotiation. 306 * We will never be in full-duplex mode if this is 307 * the case, so reading the PAR is OK. 308 */ 309 par = PHY_READ(sc, MII_NSPHY_PAR); 310 if (par & PAR_10) 311 mii->mii_media_active |= IFM_10_T; 312 else 313 mii->mii_media_active |= IFM_100_TX; 314 #if 0 315 if (par & PAR_FDX) 316 mii->mii_media_active |= IFM_FDX; 317 #endif 318 } else 319 mii->mii_media_active = ife->ifm_media; 320 } 321 322 static void 323 nsphy_reset(struct mii_softc *sc) 324 { 325 int reg, i; 326 327 if (sc->mii_flags & MIIF_NOISOLATE) 328 reg = BMCR_RESET; 329 else 330 reg = BMCR_RESET | BMCR_ISO; 331 PHY_WRITE(sc, MII_BMCR, reg); 332 333 /* 334 * Give it a little time to settle in case we just got power. 335 * The DP83840A data sheet suggests that a soft reset not happen 336 * within 500us of power being applied. Be conservative. 337 */ 338 delay(1000); 339 340 /* 341 * Wait another 2s for it to complete. 342 * This is only a little overkill as under normal circumstances 343 * the PHY can take up to 1s to complete reset. 344 * This is also a bit odd because after a reset, the BMCR will 345 * clear the reset bit and simply reports 0 even though the reset 346 * is not yet complete. 347 */ 348 for (i = 0; i < 1000; i++) { 349 reg = PHY_READ(sc, MII_BMCR); 350 if (reg && ((reg & BMCR_RESET) == 0)) 351 break; 352 delay(2000); 353 } 354 355 if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) { 356 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 357 } 358 } 359
Indexes created Thu Oct 23 18:09:57 GMT 2025