nsphy.c revision 1.57.22.2
1 /* $NetBSD: nsphy.c,v 1.57.22.2 2017/12/03 11:37:06 jdolecek Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2000 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 /* 58 * driver for National Semiconductor's DP83840A ethernet 10/100 PHY 59 * Data Sheet available from www.national.com 60 */ 61 62 #include <sys/cdefs.h> 63 __KERNEL_RCSID(0, "$NetBSD: nsphy.c,v 1.57.22.2 2017/12/03 11:37:06 jdolecek Exp $"); 64 65 #include <sys/param.h> 66 #include <sys/systm.h> 67 #include <sys/kernel.h> 68 #include <sys/device.h> 69 #include <sys/socket.h> 70 #include <sys/errno.h> 71 72 #include <net/if.h> 73 #include <net/if_media.h> 74 75 #include <dev/mii/mii.h> 76 #include <dev/mii/miivar.h> 77 #include <dev/mii/miidevs.h> 78 79 #include <dev/mii/nsphyreg.h> 80 81 static int nsphymatch(device_t, cfdata_t, void *); 82 static void nsphyattach(device_t, device_t, void *); 83 84 CFATTACH_DECL_NEW(nsphy, sizeof(struct mii_softc), 85 nsphymatch, nsphyattach, mii_phy_detach, mii_phy_activate); 86 87 static int nsphy_service(struct mii_softc *, struct mii_data *, int); 88 static void nsphy_status(struct mii_softc *); 89 static void nsphy_reset(struct mii_softc *sc); 90 91 static const struct mii_phy_funcs nsphy_funcs = { 92 nsphy_service, nsphy_status, nsphy_reset, 93 }; 94 95 static const struct mii_phydesc nsphys[] = { 96 { MII_OUI_xxNATSEMI, MII_MODEL_xxNATSEMI_DP83840, 97 MII_STR_xxNATSEMI_DP83840 }, 98 99 { 0, 0, 100 NULL }, 101 }; 102 103 static int 104 nsphymatch(device_t parent, cfdata_t match, void *aux) 105 { 106 struct mii_attach_args *ma = aux; 107 108 if (mii_phy_match(ma, nsphys) != NULL) 109 return (10); 110 111 return (0); 112 } 113 114 static void 115 nsphyattach(device_t parent, device_t self, void *aux) 116 { 117 struct mii_softc *sc = device_private(self); 118 struct mii_attach_args *ma = aux; 119 struct mii_data *mii = ma->mii_data; 120 const struct mii_phydesc *mpd; 121 122 mpd = mii_phy_match(ma, nsphys); 123 aprint_naive(": Media interface\n"); 124 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 125 126 sc->mii_dev = self; 127 sc->mii_inst = mii->mii_instance; 128 sc->mii_phy = ma->mii_phyno; 129 sc->mii_funcs = &nsphy_funcs; 130 sc->mii_pdata = mii; 131 sc->mii_flags = ma->mii_flags; 132 sc->mii_anegticks = MII_ANEGTICKS; 133 134 PHY_RESET(sc); 135 136 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 137 aprint_normal_dev(self, ""); 138 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 139 aprint_error("no media present"); 140 else 141 mii_phy_add_media(sc); 142 aprint_normal("\n"); 143 } 144 145 static int 146 nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 147 { 148 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 149 int reg; 150 151 switch (cmd) { 152 case MII_POLLSTAT: 153 /* 154 * If we're not polling our PHY instance, just return. 155 */ 156 if (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst) 157 return (0); 158 break; 159 160 case MII_MEDIACHG: 161 /* 162 * If the media indicates a different PHY instance, 163 * isolate ourselves. 164 */ 165 if (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst) { 166 reg = PHY_READ(sc, MII_BMCR); 167 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 168 return (0); 169 } 170 171 /* 172 * If the interface is not up, don't do anything. 173 */ 174 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 175 break; 176 177 reg = PHY_READ(sc, MII_NSPHY_PCR); 178 179 /* 180 * Set up the PCR to use LED4 to indicate full-duplex 181 * in both 10baseT and 100baseTX modes. 182 */ 183 reg |= PCR_LED4MODE; 184 185 /* 186 * Make sure Carrier Integrity Monitor function is 187 * disabled (normal for Node operation, but sometimes 188 * it's not set?!) 189 */ 190 reg |= PCR_CIMDIS; 191 192 /* 193 * Make sure "force link good" is set to normal mode. 194 * It's only intended for debugging. 195 */ 196 reg |= PCR_FLINK100; 197 198 /* 199 * Mystery bits which are supposedly `reserved', 200 * but we seem to need to set them when the PHY 201 * is connected to some interfaces: 202 * 203 * 0x0400 is needed for fxp 204 * (Intel EtherExpress Pro 10+/100B, 82557 chip) 205 * (nsphy with a DP83840 chip) 206 * 0x0100 may be needed for some other card 207 */ 208 reg |= 0x0100 | 0x0400; 209 210 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 211 212 mii_phy_setmedia(sc); 213 break; 214 215 case MII_TICK: 216 /* 217 * If we're not currently selected, just return. 218 */ 219 if (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst) 220 return (0); 221 222 if (mii_phy_tick(sc) == EJUSTRETURN) 223 return (0); 224 break; 225 226 case MII_DOWN: 227 mii_phy_down(sc); 228 return (0); 229 } 230 231 /* Update the media status. */ 232 mii_phy_status(sc); 233 234 /* Callback if something changed. */ 235 mii_phy_update(sc, cmd); 236 return (0); 237 } 238 239 static void 240 nsphy_status(struct mii_softc *sc) 241 { 242 struct mii_data *mii = sc->mii_pdata; 243 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 244 int bmsr, bmcr, par, anlpar; 245 246 mii->mii_media_status = IFM_AVALID; 247 mii->mii_media_active = IFM_ETHER; 248 249 bmsr = PHY_READ(sc, MII_BMSR) | 250 PHY_READ(sc, MII_BMSR); 251 if (bmsr & BMSR_LINK) 252 mii->mii_media_status |= IFM_ACTIVE; 253 254 bmcr = PHY_READ(sc, MII_BMCR); 255 if (bmcr & BMCR_ISO) { 256 mii->mii_media_active |= IFM_NONE; 257 mii->mii_media_status = 0; 258 return; 259 } 260 261 if (bmcr & BMCR_LOOP) 262 mii->mii_media_active |= IFM_LOOP; 263 264 if (bmcr & BMCR_AUTOEN) { 265 /* 266 * The PAR status bits are only valid if autonegotiation 267 * has completed (or it's disabled). 268 */ 269 if ((bmsr & BMSR_ACOMP) == 0) { 270 /* Erg, still trying, I guess... */ 271 mii->mii_media_active |= IFM_NONE; 272 return; 273 } 274 275 /* 276 * Argh. The PAR doesn't seem to indicate duplex mode 277 * properly! Determine media based on link partner's 278 * advertised capabilities. 279 */ 280 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 281 anlpar = PHY_READ(sc, MII_ANAR) & 282 PHY_READ(sc, MII_ANLPAR); 283 if (anlpar & ANLPAR_TX_FD) 284 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 285 else if (anlpar & ANLPAR_T4) 286 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 287 else if (anlpar & ANLPAR_TX) 288 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 289 else if (anlpar & ANLPAR_10_FD) 290 mii->mii_media_active |= IFM_10_T|IFM_FDX; 291 else if (anlpar & ANLPAR_10) 292 mii->mii_media_active |= IFM_10_T|IFM_HDX; 293 else 294 mii->mii_media_active |= IFM_NONE; 295 return; 296 } 297 298 /* 299 * Link partner is not capable of autonegotiation. 300 * We will never be in full-duplex mode if this is 301 * the case, so reading the PAR is OK. 302 */ 303 par = PHY_READ(sc, MII_NSPHY_PAR); 304 if (par & PAR_10) 305 mii->mii_media_active |= IFM_10_T; 306 else 307 mii->mii_media_active |= IFM_100_TX; 308 mii->mii_media_active |= IFM_HDX; 309 } else 310 mii->mii_media_active = ife->ifm_media; 311 } 312 313 static void 314 nsphy_reset(struct mii_softc *sc) 315 { 316 int reg, i; 317 318 if (sc->mii_flags & MIIF_NOISOLATE) 319 reg = BMCR_RESET; 320 else 321 reg = BMCR_RESET | BMCR_ISO; 322 PHY_WRITE(sc, MII_BMCR, reg); 323 324 /* 325 * Give it a little time to settle in case we just got power. 326 * The DP83840A data sheet suggests that a soft reset not happen 327 * within 500us of power being applied. Be conservative. 328 */ 329 delay(1000); 330 331 /* 332 * Wait another 2s for it to complete. 333 * This is only a little overkill as under normal circumstances 334 * the PHY can take up to 1s to complete reset. 335 * This is also a bit odd because after a reset, the BMCR will 336 * clear the reset bit and simply reports 0 even though the reset 337 * is not yet complete. 338 */ 339 for (i = 0; i < 1000; i++) { 340 reg = PHY_READ(sc, MII_BMCR); 341 if (reg && ((reg & BMCR_RESET) == 0)) 342 break; 343 delay(2000); 344 } 345 346 if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) { 347 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 348 } 349 } 350
Indexes created Wed Oct 22 13:09:56 GMT 2025