nsphyter.c revision 175702
1/* $NetBSD: nsphyter.c,v 1.28 2008/01/20 07:58:19 msaitoh Exp $ */ 2 3/*- 4 * Copyright (c) 1998, 1999, 2000, 2001 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: head/sys/dev/mii/nsphyter.c 175702 2008-01-27 01:10:41Z marius $"); 71 72/* 73 * driver for National Semiconductor's DP83843 `PHYTER' ethernet 10/100 PHY 74 * Data Sheet available from www.national.com 75 * 76 * We also support the DP83815 `MacPHYTER' internal PHY since, for our 77 * purposes, they are compatible. 78 */ 79 80#include <sys/param.h> 81#include <sys/systm.h> 82#include <sys/bus.h> 83#include <sys/errno.h> 84#include <sys/kernel.h> 85#include <sys/module.h> 86#include <sys/socket.h> 87 88#include <net/if.h> 89#include <net/if_media.h> 90 91#include <dev/mii/mii.h> 92#include <dev/mii/miivar.h> 93#include "miidevs.h" 94 95#include <dev/mii/nsphyterreg.h> 96 97#include "miibus_if.h" 98 99static device_probe_t nsphyter_probe; 100static device_attach_t nsphyter_attach; 101 102static device_method_t nsphyter_methods[] = { 103 /* device interface */ 104 DEVMETHOD(device_probe, nsphyter_probe), 105 DEVMETHOD(device_attach, nsphyter_attach), 106 DEVMETHOD(device_detach, mii_phy_detach), 107 DEVMETHOD(device_shutdown, bus_generic_shutdown), 108 { 0, 0 } 109}; 110 111static devclass_t nsphyter_devclass; 112 113static driver_t nsphyter_driver = { 114 "nsphyter", 115 nsphyter_methods, 116 sizeof(struct mii_softc) 117}; 118 119DRIVER_MODULE(nsphyter, miibus, nsphyter_driver, nsphyter_devclass, 0, 0); 120 121static int nsphyter_service(struct mii_softc *, struct mii_data *, int); 122static void nsphyter_status(struct mii_softc *); 123static void nsphyter_reset(struct mii_softc *); 124 125static const struct mii_phydesc nsphys[] = { 126 MII_PHY_DESC(NATSEMI, DP83815), 127 MII_PHY_DESC(NATSEMI, DP83843), 128 MII_PHY_DESC(NATSEMI, DP83847), 129 MII_PHY_END 130}; 131 132static int 133nsphyter_probe(device_t dev) 134{ 135 136 return (mii_phy_dev_probe(dev, nsphys, BUS_PROBE_DEFAULT)); 137} 138 139static int 140nsphyter_attach(device_t dev) 141{ 142 struct mii_softc *sc; 143 struct mii_attach_args *ma; 144 struct mii_data *mii; 145 const char *nic; 146 147 sc = device_get_softc(dev); 148 ma = device_get_ivars(dev); 149 sc->mii_dev = device_get_parent(dev); 150 mii = device_get_softc(sc->mii_dev); 151 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 152 153 sc->mii_inst = mii->mii_instance; 154 sc->mii_phy = ma->mii_phyno; 155 sc->mii_service = nsphyter_service; 156 sc->mii_pdata = mii; 157 158 mii->mii_instance++; 159 160#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 161 162 nic = device_get_name(device_get_parent(sc->mii_dev)); 163 /* 164 * In order for MII loopback to work Am79C971 and greater PCnet 165 * chips additionally need to be placed into external loopback 166 * mode which pcn(4) doesn't do so far. 167 */ 168 if (strcmp(nic, "pcn") != 0) 169#if 1 170 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, 171 sc->mii_inst), MII_MEDIA_100_TX); 172#else 173 if (strcmp(nic, "pcn") == 0) 174 sc->mii_flags |= MIIF_NOLOOP; 175#endif 176 177 nsphyter_reset(sc); 178 179 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 180 device_printf(dev, " "); 181 mii_phy_add_media(sc); 182 printf("\n"); 183 184#undef ADD 185 186 MIIBUS_MEDIAINIT(sc->mii_dev); 187 return (0); 188} 189 190static int 191nsphyter_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 192{ 193 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 194 int reg; 195 196 switch (cmd) { 197 case MII_POLLSTAT: 198 /* 199 * If we're not polling our PHY instance, just return. 200 */ 201 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 202 return (0); 203 break; 204 205 case MII_MEDIACHG: 206 /* 207 * If the media indicates a different PHY instance, 208 * isolate ourselves. 209 */ 210 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 211 reg = PHY_READ(sc, MII_BMCR); 212 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 213 return (0); 214 } 215 216 /* 217 * If the interface is not up, don't do anything. 218 */ 219 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 220 break; 221 222 mii_phy_setmedia(sc); 223 break; 224 225 case MII_TICK: 226 /* 227 * If we're not currently selected, just return. 228 */ 229 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 230 return (0); 231 if (mii_phy_tick(sc) == EJUSTRETURN) 232 return (0); 233 break; 234 } 235 236 /* Update the media status. */ 237 nsphyter_status(sc); 238 239 /* Callback if something changed. */ 240 mii_phy_update(sc, cmd); 241 return (0); 242} 243 244static void 245nsphyter_status(struct mii_softc *sc) 246{ 247 struct mii_data *mii = sc->mii_pdata; 248 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 249 int bmsr, bmcr, physts; 250 251 mii->mii_media_status = IFM_AVALID; 252 mii->mii_media_active = IFM_ETHER; 253 254 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 255 physts = PHY_READ(sc, MII_NSPHYTER_PHYSTS); 256 257 if ((physts & PHYSTS_LINK) != 0) 258 mii->mii_media_status |= IFM_ACTIVE; 259 260 bmcr = PHY_READ(sc, MII_BMCR); 261 if ((bmcr & BMCR_ISO) != 0) { 262 mii->mii_media_active |= IFM_NONE; 263 mii->mii_media_status = 0; 264 return; 265 } 266 267 if ((bmcr & BMCR_LOOP) != 0) 268 mii->mii_media_active |= IFM_LOOP; 269 270 if ((bmcr & BMCR_AUTOEN) != 0) { 271 /* 272 * The media 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 if ((physts & PHYSTS_SPEED10) != 0) 282 mii->mii_media_active |= IFM_10_T; 283 else 284 mii->mii_media_active |= IFM_100_TX; 285 if ((physts & PHYSTS_DUPLEX) != 0) 286#ifdef notyet 287 mii->mii_media_active |= 288 IFM_FDX | mii_phy_flowstatus(sc); 289#else 290 mii->mii_media_active |= IFM_FDX; 291#endif 292 else 293 mii->mii_media_active |= IFM_HDX; 294 } else 295 mii->mii_media_active = ife->ifm_media; 296} 297 298static void 299nsphyter_reset(struct mii_softc *sc) 300{ 301 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 302 int reg, i; 303 304 if ((sc->mii_flags & MIIF_NOISOLATE) != 0) 305 reg = BMCR_RESET; 306 else 307 reg = BMCR_RESET | BMCR_ISO; 308 PHY_WRITE(sc, MII_BMCR, reg); 309 310 /* 311 * It is best to allow a little time for the reset to settle 312 * in before we start polling the BMCR again. Notably, the 313 * DP8384{3,7} manuals state that there should be a 500us delay 314 * between asserting software reset and attempting MII serial 315 * operations. Be conservative. Also, a DP83815 can get into 316 * a bad state on cable removal and reinsertion if we do not 317 * delay here. 318 */ 319 DELAY(1000); 320 321 /* 322 * Wait another 2s for it to complete. 323 * This is only a little overkill as under normal circumstances 324 * the PHY can take up to 1s to complete reset. 325 * This is also a bit odd because after a reset, the BMCR will 326 * clear the reset bit and simply reports 0 even though the reset 327 * is not yet complete. 328 */ 329 for (i = 0; i < 1000; i++) { 330 reg = PHY_READ(sc, MII_BMCR); 331 if (reg != 0 && (reg & BMCR_RESET) == 0) 332 break; 333 DELAY(2000); 334 } 335 336 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) { 337 if ((ife == NULL && sc->mii_inst != 0) || 338 (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst)) 339 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 340 } 341} 342