1 /* $OpenBSD: nsphy.c,v 1.29 2022/04/06 18:59:29 naddy 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/device.h> 66 #include <sys/socket.h> 67 #include <sys/errno.h> 68 69 #include <net/if.h> 70 #include <net/if_var.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 const struct cfattach nsphy_ca = { 83 sizeof(struct mii_softc), nsphymatch, nsphyattach, mii_phy_detach 84 }; 85 86 struct cfdriver nsphy_cd = { 87 NULL, "nsphy", DV_DULL 88 }; 89 90 int nsphy_service(struct mii_softc *, struct mii_data *, int); 91 void nsphy_status(struct mii_softc *); 92 void nsphy_reset(struct mii_softc *); 93 94 const struct mii_phy_funcs nsphy_funcs = { 95 nsphy_service, nsphy_status, nsphy_reset, 96 }; 97 98 static const struct mii_phydesc nsphys[] = { 99 { MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83840, 100 MII_STR_NATSEMI_DP83840 }, 101 102 { 0, 0, 103 NULL }, 104 }; 105 106 int 107 nsphymatch(struct device *parent, void *match, void *aux) 108 { 109 struct mii_attach_args *ma = aux; 110 111 if (mii_phy_match(ma, nsphys) != NULL) 112 return (10); 113 114 return (0); 115 } 116 117 void 118 nsphyattach(struct device *parent, struct device *self, void *aux) 119 { 120 struct mii_softc *sc = (struct mii_softc *)self; 121 struct mii_attach_args *ma = aux; 122 struct mii_data *mii = ma->mii_data; 123 const struct mii_phydesc *mpd; 124 125 mpd = mii_phy_match(ma, nsphys); 126 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 127 128 sc->mii_inst = mii->mii_instance; 129 sc->mii_phy = ma->mii_phyno; 130 sc->mii_funcs = &nsphy_funcs; 131 sc->mii_pdata = mii; 132 sc->mii_flags = ma->mii_flags; 133 sc->mii_anegticks = MII_ANEGTICKS; 134 135 PHY_RESET(sc); 136 137 sc->mii_capabilities = 138 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 139 if (sc->mii_capabilities & BMSR_MEDIAMASK) 140 mii_phy_add_media(sc); 141 } 142 143 int 144 nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 145 { 146 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 147 int reg; 148 149 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0) 150 return (ENXIO); 151 152 switch (cmd) { 153 case MII_POLLSTAT: 154 /* 155 * If we're not polling our PHY instance, just return. 156 */ 157 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 158 return (0); 159 break; 160 161 case MII_MEDIACHG: 162 /* 163 * If the media indicates a different PHY instance, 164 * isolate ourselves. 165 */ 166 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 167 reg = PHY_READ(sc, MII_BMCR); 168 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 169 return (0); 170 } 171 172 /* 173 * If the interface is not up, don't do anything. 174 */ 175 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 176 break; 177 178 reg = PHY_READ(sc, MII_NSPHY_PCR); 179 180 /* 181 * Set up the PCR to use LED4 to indicate full-duplex 182 * in both 10baseT and 100baseTX modes. 183 */ 184 reg |= PCR_LED4MODE; 185 186 /* 187 * Make sure Carrier Integrity Monitor function is 188 * disabled (normal for Node operation, but sometimes 189 * it's not set?!) 190 */ 191 reg |= PCR_CIMDIS; 192 193 /* 194 * Make sure "force link good" is set to normal mode. 195 * It's only intended for debugging. 196 */ 197 reg |= PCR_FLINK100; 198 199 /* 200 * Mystery bits which are supposedly `reserved', 201 * but we seem to need to set them when the PHY 202 * is connected to some interfaces! 203 */ 204 reg |= PCR_CONGCTRL | PCR_TXREADYSEL; 205 206 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 207 208 mii_phy_setmedia(sc); 209 break; 210 211 case MII_TICK: 212 /* 213 * If we're not currently selected, just return. 214 */ 215 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 216 return (0); 217 218 if (mii_phy_tick(sc) == EJUSTRETURN) 219 return (0); 220 break; 221 222 case MII_DOWN: 223 mii_phy_down(sc); 224 return (0); 225 } 226 227 /* Update the media status. */ 228 mii_phy_status(sc); 229 230 /* Callback if something changed. */ 231 mii_phy_update(sc, cmd); 232 return (0); 233 } 234 235 void 236 nsphy_status(struct mii_softc *sc) 237 { 238 struct mii_data *mii = sc->mii_pdata; 239 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 240 int bmsr, bmcr, par, anlpar; 241 242 mii->mii_media_status = IFM_AVALID; 243 mii->mii_media_active = IFM_ETHER; 244 245 bmsr = PHY_READ(sc, MII_BMSR) | 246 PHY_READ(sc, MII_BMSR); 247 if (bmsr & BMSR_LINK) 248 mii->mii_media_status |= IFM_ACTIVE; 249 250 bmcr = PHY_READ(sc, MII_BMCR); 251 if (bmcr & BMCR_ISO) { 252 mii->mii_media_active |= IFM_NONE; 253 mii->mii_media_status = 0; 254 return; 255 } 256 257 if (bmcr & BMCR_LOOP) 258 mii->mii_media_active |= IFM_LOOP; 259 260 if (bmcr & BMCR_AUTOEN) { 261 /* 262 * The PAR status bits are only valid if autonegotiation 263 * has completed (or it's disabled). 264 */ 265 if ((bmsr & BMSR_ACOMP) == 0) { 266 /* Erg, still trying, I guess... */ 267 mii->mii_media_active |= IFM_NONE; 268 return; 269 } 270 271 /* 272 * Argh. The PAR doesn't seem to indicate duplex mode 273 * properly! Determine media based on link partner's 274 * advertised capabilities. 275 */ 276 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 277 anlpar = PHY_READ(sc, MII_ANAR) & 278 PHY_READ(sc, MII_ANLPAR); 279 if (anlpar & ANLPAR_TX_FD) 280 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 281 else if (anlpar & ANLPAR_T4) 282 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 283 else if (anlpar & ANLPAR_TX) 284 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 285 else if (anlpar & ANLPAR_10_FD) 286 mii->mii_media_active |= IFM_10_T|IFM_FDX; 287 else if (anlpar & ANLPAR_10) 288 mii->mii_media_active |= IFM_10_T|IFM_HDX; 289 else 290 mii->mii_media_active |= IFM_NONE; 291 return; 292 } 293 294 /* 295 * Link partner is not capable of autonegotiation. 296 * We will never be in full-duplex mode if this is 297 * the case, so reading the PAR is OK. 298 */ 299 par = PHY_READ(sc, MII_NSPHY_PAR); 300 if (par & PAR_10) 301 mii->mii_media_active |= IFM_10_T; 302 else 303 mii->mii_media_active |= IFM_100_TX; 304 mii->mii_media_active |= IFM_HDX; 305 } else 306 mii->mii_media_active = ife->ifm_media; 307 } 308 309 void 310 nsphy_reset(struct mii_softc *sc) 311 { 312 int anar; 313 314 mii_phy_reset(sc); 315 anar = PHY_READ(sc, MII_ANAR); 316 anar |= BMSR_MEDIA_TO_ANAR(PHY_READ(sc, MII_BMSR)); 317 PHY_WRITE(sc, MII_ANAR, anar); 318 } 319