1 /* $OpenBSD: nsphy.c,v 1.25 2010/07/23 07:47:13 jsg 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 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 46 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 47 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 48 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 49 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 50 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 51 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 52 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 53 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 54 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 55 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 56 */ 57 58 /* 59 * driver for National Semiconductor's DP83840A ethernet 10/100 PHY 60 * Data Sheet available from www.national.com 61 */ 62 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/kernel.h> 66 #include <sys/device.h> 67 #include <sys/socket.h> 68 #include <sys/errno.h> 69 70 #include <net/if.h> 71 #include <net/if_media.h> 72 73 #include <dev/mii/mii.h> 74 #include <dev/mii/miivar.h> 75 #include <dev/mii/miidevs.h> 76 77 #include <dev/mii/nsphyreg.h> 78 79 int nsphymatch(struct device *, void *, void *); 80 void nsphyattach(struct device *, struct device *, void *); 81 82 struct cfattach nsphy_ca = { 83 sizeof(struct mii_softc), nsphymatch, nsphyattach, mii_phy_detach, 84 mii_phy_activate 85 }; 86 87 struct cfdriver nsphy_cd = { 88 NULL, "nsphy", DV_DULL 89 }; 90 91 int nsphy_service(struct mii_softc *, struct mii_data *, int); 92 void nsphy_status(struct mii_softc *); 93 void nsphy_reset(struct mii_softc *); 94 95 const struct mii_phy_funcs nsphy_funcs = { 96 nsphy_service, nsphy_status, nsphy_reset, 97 }; 98 99 static const struct mii_phydesc nsphys[] = { 100 { MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83840, 101 MII_STR_NATSEMI_DP83840 }, 102 103 { 0, 0, 104 NULL }, 105 }; 106 107 int 108 nsphymatch(struct device *parent, void *match, void *aux) 109 { 110 struct mii_attach_args *ma = aux; 111 112 if (mii_phy_match(ma, nsphys) != NULL) 113 return (10); 114 115 return (0); 116 } 117 118 void 119 nsphyattach(struct device *parent, struct device *self, void *aux) 120 { 121 struct mii_softc *sc = (struct mii_softc *)self; 122 struct mii_attach_args *ma = aux; 123 struct mii_data *mii = ma->mii_data; 124 const struct mii_phydesc *mpd; 125 126 mpd = mii_phy_match(ma, nsphys); 127 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 128 129 sc->mii_inst = mii->mii_instance; 130 sc->mii_phy = ma->mii_phyno; 131 sc->mii_funcs = &nsphy_funcs; 132 sc->mii_pdata = mii; 133 sc->mii_flags = ma->mii_flags; 134 sc->mii_anegticks = MII_ANEGTICKS; 135 136 PHY_RESET(sc); 137 138 sc->mii_capabilities = 139 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 140 if (sc->mii_capabilities & BMSR_MEDIAMASK) 141 mii_phy_add_media(sc); 142 } 143 144 int 145 nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 146 { 147 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 148 int reg; 149 150 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0) 151 return (ENXIO); 152 153 switch (cmd) { 154 case MII_POLLSTAT: 155 /* 156 * If we're not polling our PHY instance, just return. 157 */ 158 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 159 return (0); 160 break; 161 162 case MII_MEDIACHG: 163 /* 164 * If the media indicates a different PHY instance, 165 * isolate ourselves. 166 */ 167 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 168 reg = PHY_READ(sc, MII_BMCR); 169 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 170 return (0); 171 } 172 173 /* 174 * If the interface is not up, don't do anything. 175 */ 176 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 177 break; 178 179 reg = PHY_READ(sc, MII_NSPHY_PCR); 180 181 /* 182 * Set up the PCR to use LED4 to indicate full-duplex 183 * in both 10baseT and 100baseTX modes. 184 */ 185 reg |= PCR_LED4MODE; 186 187 /* 188 * Make sure Carrier Integrity Monitor function is 189 * disabled (normal for Node operation, but sometimes 190 * it's not set?!) 191 */ 192 reg |= PCR_CIMDIS; 193 194 /* 195 * Make sure "force link good" is set to normal mode. 196 * It's only intended for debugging. 197 */ 198 reg |= PCR_FLINK100; 199 200 /* 201 * Mystery bits which are supposedly `reserved', 202 * but we seem to need to set them when the PHY 203 * is connected to some interfaces! 204 */ 205 reg |= PCR_CONGCTRL | PCR_TXREADYSEL; 206 207 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 208 209 mii_phy_setmedia(sc); 210 break; 211 212 case MII_TICK: 213 /* 214 * If we're not currently selected, just return. 215 */ 216 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 217 return (0); 218 219 if (mii_phy_tick(sc) == EJUSTRETURN) 220 return (0); 221 break; 222 223 case MII_DOWN: 224 mii_phy_down(sc); 225 return (0); 226 } 227 228 /* Update the media status. */ 229 mii_phy_status(sc); 230 231 /* Callback if something changed. */ 232 mii_phy_update(sc, cmd); 233 return (0); 234 } 235 236 void 237 nsphy_status(struct mii_softc *sc) 238 { 239 struct mii_data *mii = sc->mii_pdata; 240 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 241 int bmsr, bmcr, par, anlpar; 242 243 mii->mii_media_status = IFM_AVALID; 244 mii->mii_media_active = IFM_ETHER; 245 246 bmsr = PHY_READ(sc, MII_BMSR) | 247 PHY_READ(sc, MII_BMSR); 248 if (bmsr & BMSR_LINK) 249 mii->mii_media_status |= IFM_ACTIVE; 250 251 bmcr = PHY_READ(sc, MII_BMCR); 252 if (bmcr & BMCR_ISO) { 253 mii->mii_media_active |= IFM_NONE; 254 mii->mii_media_status = 0; 255 return; 256 } 257 258 if (bmcr & BMCR_LOOP) 259 mii->mii_media_active |= IFM_LOOP; 260 261 if (bmcr & BMCR_AUTOEN) { 262 /* 263 * The PAR status bits are only valid if autonegotiation 264 * has completed (or it's disabled). 265 */ 266 if ((bmsr & BMSR_ACOMP) == 0) { 267 /* Erg, still trying, I guess... */ 268 mii->mii_media_active |= IFM_NONE; 269 return; 270 } 271 272 /* 273 * Argh. The PAR doesn't seem to indicate duplex mode 274 * properly! Determine media based on link partner's 275 * advertised capabilities. 276 */ 277 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 278 anlpar = PHY_READ(sc, MII_ANAR) & 279 PHY_READ(sc, MII_ANLPAR); 280 if (anlpar & ANLPAR_TX_FD) 281 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 282 else if (anlpar & ANLPAR_T4) 283 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 284 else if (anlpar & ANLPAR_TX) 285 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 286 else if (anlpar & ANLPAR_10_FD) 287 mii->mii_media_active |= IFM_10_T|IFM_FDX; 288 else if (anlpar & ANLPAR_10) 289 mii->mii_media_active |= IFM_10_T|IFM_HDX; 290 else 291 mii->mii_media_active |= IFM_NONE; 292 return; 293 } 294 295 /* 296 * Link partner is not capable of autonegotiation. 297 * We will never be in full-duplex mode if this is 298 * the case, so reading the PAR is OK. 299 */ 300 par = PHY_READ(sc, MII_NSPHY_PAR); 301 if (par & PAR_10) 302 mii->mii_media_active |= IFM_10_T; 303 else 304 mii->mii_media_active |= IFM_100_TX; 305 mii->mii_media_active |= IFM_HDX; 306 } else 307 mii->mii_media_active = ife->ifm_media; 308 } 309 310 void 311 nsphy_reset(struct mii_softc *sc) 312 { 313 int anar; 314 315 mii_phy_reset(sc); 316 anar = PHY_READ(sc, MII_ANAR); 317 anar |= BMSR_MEDIA_TO_ANAR(PHY_READ(sc, MII_BMSR)); 318 PHY_WRITE(sc, MII_ANAR, anar); 319 } 320