nsphyter.c revision 1.38
1 /* $NetBSD: nsphyter.c,v 1.38 2014/06/16 16:48:16 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 * 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 DP83843 `PHYTER' ethernet 10/100 PHY 59 * Data Sheet available from www.national.com 60 * 61 * We also support the DP83815 MacPHYER internal PHY since, for our 62 * purposes, they are compatible. 63 */ 64 65 #include <sys/cdefs.h> 66 __KERNEL_RCSID(0, "$NetBSD: nsphyter.c,v 1.38 2014/06/16 16:48:16 msaitoh Exp $"); 67 68 #include <sys/param.h> 69 #include <sys/systm.h> 70 #include <sys/kernel.h> 71 #include <sys/device.h> 72 #include <sys/socket.h> 73 #include <sys/errno.h> 74 75 #include <net/if.h> 76 #include <net/if_media.h> 77 78 #include <dev/mii/mii.h> 79 #include <dev/mii/miivar.h> 80 #include <dev/mii/miidevs.h> 81 82 #include <dev/mii/nsphyterreg.h> 83 84 static int nsphytermatch(device_t, cfdata_t, void *); 85 static void nsphyterattach(device_t, device_t, void *); 86 87 CFATTACH_DECL3_NEW(nsphyter, sizeof(struct mii_softc), 88 nsphytermatch, nsphyterattach, mii_phy_detach, mii_phy_activate, NULL, 89 NULL, DVF_DETACH_SHUTDOWN); 90 91 static int nsphyter_service(struct mii_softc *, struct mii_data *, int); 92 static void nsphyter_status(struct mii_softc *); 93 static void nsphyter_reset(struct mii_softc *); 94 95 static const struct mii_phy_funcs nsphyter_funcs = { 96 nsphyter_service, nsphyter_status, nsphyter_reset, 97 }; 98 99 static const struct mii_phydesc nsphyters[] = { 100 { MII_OUI_xxNATSEMI, MII_MODEL_xxNATSEMI_DP83843, 101 MII_STR_xxNATSEMI_DP83843 }, 102 103 { MII_OUI_xxNATSEMI, MII_MODEL_xxNATSEMI_DP83847, 104 MII_STR_xxNATSEMI_DP83847 }, 105 106 { MII_OUI_xxNATSEMI, MII_MODEL_xxNATSEMI_DP83849, 107 MII_STR_xxNATSEMI_DP83849 }, 108 109 { MII_OUI_xxNATSEMI, MII_MODEL_xxNATSEMI_DP83815, 110 MII_STR_xxNATSEMI_DP83815 }, 111 112 { 0, 0, 113 NULL }, 114 }; 115 116 static int 117 nsphytermatch(device_t parent, cfdata_t match, void *aux) 118 { 119 struct mii_attach_args *ma = aux; 120 121 if (mii_phy_match(ma, nsphyters) != NULL) 122 return (10); 123 124 return (0); 125 } 126 127 static void 128 nsphyterattach(device_t parent, device_t self, void *aux) 129 { 130 struct mii_softc *sc = device_private(self); 131 struct mii_attach_args *ma = aux; 132 struct mii_data *mii = ma->mii_data; 133 const struct mii_phydesc *mpd; 134 135 mpd = mii_phy_match(ma, nsphyters); 136 aprint_naive(": Media interface\n"); 137 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 138 139 sc->mii_dev = self; 140 sc->mii_inst = mii->mii_instance; 141 sc->mii_phy = ma->mii_phyno; 142 sc->mii_funcs = &nsphyter_funcs; 143 sc->mii_pdata = mii; 144 sc->mii_flags = ma->mii_flags; 145 sc->mii_anegticks = MII_ANEGTICKS; 146 147 PHY_RESET(sc); 148 149 sc->mii_capabilities = 150 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 151 aprint_normal_dev(self, ""); 152 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 153 aprint_error("no media present"); 154 else 155 mii_phy_add_media(sc); 156 aprint_normal("\n"); 157 } 158 159 static int 160 nsphyter_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 161 { 162 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 163 int reg; 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 mii_phy_setmedia(sc); 192 break; 193 194 case MII_TICK: 195 /* 196 * If we're not currently selected, just return. 197 */ 198 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 199 return (0); 200 201 if (mii_phy_tick(sc) == EJUSTRETURN) 202 return (0); 203 break; 204 205 case MII_DOWN: 206 mii_phy_down(sc); 207 return (0); 208 } 209 210 /* Update the media status. */ 211 mii_phy_status(sc); 212 213 /* Callback if something changed. */ 214 mii_phy_update(sc, cmd); 215 return (0); 216 } 217 218 static void 219 nsphyter_status(struct mii_softc *sc) 220 { 221 struct mii_data *mii = sc->mii_pdata; 222 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 223 int bmsr, bmcr, physts; 224 225 mii->mii_media_status = IFM_AVALID; 226 mii->mii_media_active = IFM_ETHER; 227 228 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 229 physts = PHY_READ(sc, MII_NSPHYTER_PHYSTS); 230 231 if (physts & PHYSTS_LINK) 232 mii->mii_media_status |= IFM_ACTIVE; 233 234 bmcr = PHY_READ(sc, MII_BMCR); 235 if (bmcr & BMCR_ISO) { 236 mii->mii_media_active |= IFM_NONE; 237 mii->mii_media_status = 0; 238 return; 239 } 240 241 if (bmcr & BMCR_LOOP) 242 mii->mii_media_active |= IFM_LOOP; 243 244 if (bmcr & BMCR_AUTOEN) { 245 /* 246 * The media status bits are only valid if autonegotiation 247 * has completed (or it's disabled). 248 */ 249 if ((bmsr & BMSR_ACOMP) == 0) { 250 /* Erg, still trying, I guess... */ 251 mii->mii_media_active |= IFM_NONE; 252 return; 253 } 254 255 if (physts & PHYSTS_SPEED10) 256 mii->mii_media_active |= IFM_10_T; 257 else 258 mii->mii_media_active |= IFM_100_TX; 259 260 if (physts & PHYSTS_DUPLEX) 261 mii->mii_media_active |= 262 IFM_FDX | mii_phy_flowstatus(sc); 263 else 264 mii->mii_media_active |= IFM_HDX; 265 } else 266 mii->mii_media_active = ife->ifm_media; 267 } 268 269 void 270 nsphyter_reset(struct mii_softc *sc) 271 { 272 int reg, i; 273 274 if (sc->mii_flags & MIIF_NOISOLATE) 275 reg = BMCR_RESET; 276 else 277 reg = BMCR_RESET | BMCR_ISO; 278 PHY_WRITE(sc, MII_BMCR, reg); 279 280 /* 281 * It is best to allow a little time for the reset to settle 282 * in before we start polling the BMCR again. Notably, the 283 * DP83840A manual states that there should be a 500us delay 284 * between asserting software reset and attempting MII serial 285 * operations. Also, a DP83815 can get into a bad state on 286 * cable removal and reinsertion if we do not delay here. 287 */ 288 delay(500); 289 290 /* Wait another 100ms for it to complete. */ 291 for (i = 0; i < 100; i++) { 292 reg = PHY_READ(sc, MII_BMCR); 293 if ((reg & BMCR_RESET) == 0) 294 break; 295 delay(1000); 296 } 297 298 if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) 299 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 300 } 301
Indexes created Tue Sep 30 20:09:53 GMT 2025