Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/nsphy.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
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 * 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 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 55 */ 56 57 #include <sys/cdefs.h> 58 __FBSDID("$FreeBSD: releng/8.4/sys/dev/mii/nsphy.c 230718 2012-01-29 01:35:14Z marius $"); 59 60 /* 61 * driver for National Semiconductor's DP83840A ethernet 10/100 PHY 62 * Data Sheet available from www.national.com 63 */ 64 65 #include <sys/param.h> 66 #include <sys/systm.h> 67 #include <sys/kernel.h> 68 #include <sys/socket.h> 69 #include <sys/errno.h> 70 #include <sys/module.h> 71 #include <sys/bus.h> 72 73 #include <net/if.h> 74 #include <net/if_media.h> 75 76 #include <dev/mii/mii.h> 77 #include <dev/mii/miivar.h> 78 #include "miidevs.h" 79 80 #include <dev/mii/nsphyreg.h> 81 82 #include "miibus_if.h" 83 84 static int nsphy_probe(device_t); 85 static int nsphy_attach(device_t); 86 87 static device_method_t nsphy_methods[] = { 88 /* device interface */ 89 DEVMETHOD(device_probe, nsphy_probe), 90 DEVMETHOD(device_attach, nsphy_attach), 91 DEVMETHOD(device_detach, mii_phy_detach), 92 DEVMETHOD(device_shutdown, bus_generic_shutdown), 93 DEVMETHOD_END 94 }; 95 96 static devclass_t nsphy_devclass; 97 98 static driver_t nsphy_driver = { 99 "nsphy", 100 nsphy_methods, 101 sizeof(struct mii_softc) 102 }; 103 104 DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0); 105 106 static int nsphy_service(struct mii_softc *, struct mii_data *, int); 107 static void nsphy_status(struct mii_softc *); 108 static void nsphy_reset(struct mii_softc *); 109 110 static const struct mii_phydesc nsphys[] = { 111 MII_PHY_DESC(NATSEMI, DP83840), 112 MII_PHY_END 113 }; 114 115 static int 116 nsphy_probe(device_t dev) 117 { 118 119 return (mii_phy_dev_probe(dev, nsphys, BUS_PROBE_DEFAULT)); 120 } 121 122 static int 123 nsphy_attach(device_t dev) 124 { 125 struct mii_softc *sc; 126 struct mii_attach_args *ma; 127 struct mii_data *mii; 128 const char *nic; 129 130 sc = device_get_softc(dev); 131 ma = device_get_ivars(dev); 132 sc->mii_dev = device_get_parent(dev); 133 mii = ma->mii_data; 134 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 135 136 sc->mii_flags = miibus_get_flags(dev); 137 sc->mii_inst = mii->mii_instance++; 138 sc->mii_phy = ma->mii_phyno; 139 sc->mii_service = nsphy_service; 140 sc->mii_pdata = mii; 141 142 sc->mii_flags |= MIIF_NOMANPAUSE; 143 144 nic = device_get_name(device_get_parent(sc->mii_dev)); 145 /* 146 * Am79C971 wedge when isolating all of their external PHYs. 147 */ 148 if (strcmp(nic, "pcn") == 0) 149 sc->mii_flags |= MIIF_NOISOLATE; 150 151 #if 1 152 153 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 154 155 /* 156 * XXX IFM_LOOP should be handled by mii_phy_add_media() based 157 * on MIIF_NOLOOP. 158 */ 159 if ((sc->mii_flags & MIIF_NOLOOP) == 0) 160 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, 161 sc->mii_inst), MII_MEDIA_100_TX); 162 163 #endif 164 165 nsphy_reset(sc); 166 167 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 168 device_printf(dev, " "); 169 mii_phy_add_media(sc); 170 printf("\n"); 171 172 MIIBUS_MEDIAINIT(sc->mii_dev); 173 return (0); 174 } 175 176 static int 177 nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 178 { 179 int reg; 180 181 switch (cmd) { 182 case MII_POLLSTAT: 183 break; 184 185 case MII_MEDIACHG: 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 if (strcmp(mii->mii_ifp->if_dname, "fxp") == 0) 226 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 227 228 mii_phy_setmedia(sc); 229 break; 230 231 case MII_TICK: 232 if (mii_phy_tick(sc) == EJUSTRETURN) 233 return (0); 234 break; 235 } 236 237 /* Update the media status. */ 238 nsphy_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 if 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_TX_FD) 290 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 291 else if (anlpar & ANLPAR_T4) 292 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 293 else if (anlpar & ANLPAR_TX) 294 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 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|IFM_HDX; 299 else 300 mii->mii_media_active |= IFM_NONE; 301 if ((mii->mii_media_active & IFM_FDX) != 0) 302 mii->mii_media_active |= 303 mii_phy_flowstatus(sc); 304 return; 305 } 306 307 /* 308 * Link partner is not capable of autonegotiation. 309 * We will never be in full-duplex mode if this is 310 * the case, so reading the PAR is OK. 311 */ 312 par = PHY_READ(sc, MII_NSPHY_PAR); 313 if (par & PAR_10) 314 mii->mii_media_active |= IFM_10_T; 315 else 316 mii->mii_media_active |= IFM_100_TX; 317 mii->mii_media_active |= IFM_HDX; 318 } else 319 mii->mii_media_active = ife->ifm_media; 320 } 321 322 static void 323 nsphy_reset(struct mii_softc *sc) 324 { 325 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 326 int reg, i; 327 328 if (sc->mii_flags & MIIF_NOISOLATE) 329 reg = BMCR_RESET; 330 else 331 reg = BMCR_RESET | BMCR_ISO; 332 PHY_WRITE(sc, MII_BMCR, reg); 333 334 /* 335 * It is best to allow a little time for the reset to settle 336 * in before we start polling the BMCR again. Notably, the 337 * DP83840A manuals state that there should be a 500us delay 338 * between asserting software reset and attempting MII serial 339 * operations. Be conservative. 340 */ 341 DELAY(1000); 342 343 /* 344 * Wait another 2s for it to complete. 345 * This is only a little overkill as under normal circumstances 346 * the PHY can take up to 1s to complete reset. 347 * This is also a bit odd because after a reset, the BMCR will 348 * clear the reset bit and simply reports 0 even though the reset 349 * is not yet complete. 350 */ 351 for (i = 0; i < 1000; i++) { 352 reg = PHY_READ(sc, MII_BMCR); 353 if (reg != 0 && (reg & BMCR_RESET) == 0) 354 break; 355 DELAY(2000); 356 } 357 358 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) { 359 if ((ife == NULL && sc->mii_inst != 0) || 360 (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst)) 361 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 362 } 363 }
Cache object: bd43f7debaf2add0295e7a5fd51ad412
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]