nsphy.c revision 1.20
1/* $OpenBSD: nsphy.c,v 1.20 2006/12/27 19:11:09 kettenis Exp $ */ 2/* $NetBSD: nsphy.c,v 1.25 2000/02/02 23:34:57 thorpej Exp $ */ 3 4/*- 5 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 10 * NASA Ames Research Center. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the NetBSD 23 * Foundation, Inc. and its contributors. 24 * 4. Neither the name of The NetBSD Foundation nor the names of its 25 * contributors may be used to endorse or promote products derived 26 * from this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 */ 40 41/* 42 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by Manuel Bouyer. 55 * 4. The name of the author may not be used to endorse or promote products 56 * derived from this software without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 61 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 62 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 63 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 64 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 65 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 66 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 67 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 68 */ 69 70/* 71 * driver for National Semiconductor's DP83840A ethernet 10/100 PHY 72 * Data Sheet available from www.national.com 73 */ 74 75#include <sys/param.h> 76#include <sys/systm.h> 77#include <sys/kernel.h> 78#include <sys/device.h> 79#include <sys/socket.h> 80#include <sys/errno.h> 81 82#include <net/if.h> 83#include <net/if_media.h> 84 85#include <dev/mii/mii.h> 86#include <dev/mii/miivar.h> 87#include <dev/mii/miidevs.h> 88 89#include <dev/mii/nsphyreg.h> 90 91int nsphymatch(struct device *, void *, void *); 92void nsphyattach(struct device *, struct device *, void *); 93 94struct cfattach nsphy_ca = { 95 sizeof(struct mii_softc), nsphymatch, nsphyattach, mii_phy_detach, 96 mii_phy_activate 97}; 98 99struct cfdriver nsphy_cd = { 100 NULL, "nsphy", DV_DULL 101}; 102 103int nsphy_service(struct mii_softc *, struct mii_data *, int); 104void nsphy_status(struct mii_softc *); 105void nsphy_reset(struct mii_softc *); 106 107const struct mii_phy_funcs nsphy_funcs = { 108 nsphy_service, nsphy_status, nsphy_reset, 109}; 110 111static const struct mii_phydesc nsphys[] = { 112 { MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83840, 113 MII_STR_NATSEMI_DP83840 }, 114 115 { 0, 0, 116 NULL }, 117}; 118 119int 120nsphymatch(struct device *parent, void *match, void *aux) 121{ 122 struct mii_attach_args *ma = aux; 123 124 if (mii_phy_match(ma, nsphys) != NULL) 125 return (10); 126 127 return (0); 128} 129 130void 131nsphyattach(struct device *parent, struct device *self, void *aux) 132{ 133 struct mii_softc *sc = (struct mii_softc *)self; 134 struct mii_attach_args *ma = aux; 135 struct mii_data *mii = ma->mii_data; 136 const struct mii_phydesc *mpd; 137 138 mpd = mii_phy_match(ma, nsphys); 139 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 140 141 sc->mii_inst = mii->mii_instance; 142 sc->mii_phy = ma->mii_phyno; 143 sc->mii_funcs = &nsphy_funcs; 144 sc->mii_pdata = mii; 145 sc->mii_flags = ma->mii_flags; 146 sc->mii_anegticks = MII_ANEGTICKS; 147 148 PHY_RESET(sc); 149 150 sc->mii_capabilities = 151 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 152 if (sc->mii_capabilities & BMSR_MEDIAMASK) 153 mii_phy_add_media(sc); 154} 155 156int 157nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 158{ 159 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 160 int reg; 161 162 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0) 163 return (ENXIO); 164 165 switch (cmd) { 166 case MII_POLLSTAT: 167 /* 168 * If we're not polling our PHY instance, just return. 169 */ 170 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 171 return (0); 172 break; 173 174 case MII_MEDIACHG: 175 /* 176 * If the media indicates a different PHY instance, 177 * isolate ourselves. 178 */ 179 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 180 reg = PHY_READ(sc, MII_BMCR); 181 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 182 return (0); 183 } 184 185 /* 186 * If the interface is not up, don't do anything. 187 */ 188 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 189 break; 190 191 reg = PHY_READ(sc, MII_NSPHY_PCR); 192 193 /* 194 * Set up the PCR to use LED4 to indicate full-duplex 195 * in both 10baseT and 100baseTX modes. 196 */ 197 reg |= PCR_LED4MODE; 198 199 /* 200 * Make sure Carrier Integrity Monitor function is 201 * disabled (normal for Node operation, but sometimes 202 * it's not set?!) 203 */ 204 reg |= PCR_CIMDIS; 205 206 /* 207 * Make sure "force link good" is set to normal mode. 208 * It's only intended for debugging. 209 */ 210 reg |= PCR_FLINK100; 211 212 /* 213 * Mystery bits which are supposedly `reserved', 214 * but we seem to need to set them when the PHY 215 * is connected to some interfaces! 216 */ 217 reg |= PCR_CONGCTRL | PCR_TXREADYSEL; 218 219 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 220 221 mii_phy_setmedia(sc); 222 break; 223 224 case MII_TICK: 225 /* 226 * If we're not currently selected, just return. 227 */ 228 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 229 return (0); 230 231 if (mii_phy_tick(sc) == EJUSTRETURN) 232 return (0); 233 break; 234 235 case MII_DOWN: 236 mii_phy_down(sc); 237 return (0); 238 } 239 240 /* Update the media status. */ 241 mii_phy_status(sc); 242 243 /* Callback if something changed. */ 244 mii_phy_update(sc, cmd); 245 return (0); 246} 247 248void 249nsphy_status(struct mii_softc *sc) 250{ 251 struct mii_data *mii = sc->mii_pdata; 252 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 253 int bmsr, bmcr, par, anlpar; 254 255 mii->mii_media_status = IFM_AVALID; 256 mii->mii_media_active = IFM_ETHER; 257 258 bmsr = PHY_READ(sc, MII_BMSR) | 259 PHY_READ(sc, MII_BMSR); 260 if (bmsr & BMSR_LINK) 261 mii->mii_media_status |= IFM_ACTIVE; 262 263 bmcr = PHY_READ(sc, MII_BMCR); 264 if (bmcr & BMCR_ISO) { 265 mii->mii_media_active |= IFM_NONE; 266 mii->mii_media_status = 0; 267 return; 268 } 269 270 if (bmcr & BMCR_LOOP) 271 mii->mii_media_active |= IFM_LOOP; 272 273 if (bmcr & BMCR_AUTOEN) { 274 /* 275 * The PAR status bits are only valid of autonegotiation 276 * has completed (or it's disabled). 277 */ 278 if ((bmsr & BMSR_ACOMP) == 0) { 279 /* Erg, still trying, I guess... */ 280 mii->mii_media_active |= IFM_NONE; 281 return; 282 } 283 284 /* 285 * Argh. The PAR doesn't seem to indicate duplex mode 286 * properly! Determine media based on link partner's 287 * advertised capabilities. 288 */ 289 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 290 anlpar = PHY_READ(sc, MII_ANAR) & 291 PHY_READ(sc, MII_ANLPAR); 292 if (anlpar & ANLPAR_T4) 293 mii->mii_media_active |= IFM_100_T4; 294 else if (anlpar & ANLPAR_TX_FD) 295 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 296 else if (anlpar & ANLPAR_TX) 297 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 298 else if (anlpar & ANLPAR_10_FD) 299 mii->mii_media_active |= IFM_10_T|IFM_FDX; 300 else if (anlpar & ANLPAR_10) 301 mii->mii_media_active |= IFM_10_T|IFM_HDX; 302 else 303 mii->mii_media_active |= IFM_NONE; 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 322void 323nsphy_reset(struct mii_softc *sc) 324{ 325 int anar; 326 327 mii_phy_reset(sc); 328 anar = PHY_READ(sc, MII_ANAR); 329 anar |= BMSR_MEDIA_TO_ANAR(PHY_READ(sc, MII_BMSR)); 330 PHY_WRITE(sc, MII_ANAR, anar); 331} 332