1 /* $NetBSD: nsphyter.c,v 1.35 2009/10/19 18:41:14 bouyer 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 1.35 2009/10/19 18:41:14 bouyer 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_DP83815, 107 MII_STR_xxNATSEMI_DP83815 }, 108 109 { 0, 0, 110 NULL }, 111 }; 112 113 static int 114 nsphytermatch(device_t parent, cfdata_t match, void *aux) 115 { 116 struct mii_attach_args *ma = aux; 117 118 if (mii_phy_match(ma, nsphyters) != NULL) 119 return (10); 120 121 return (0); 122 } 123 124 static void 125 nsphyterattach(device_t parent, device_t self, void *aux) 126 { 127 struct mii_softc *sc = device_private(self); 128 struct mii_attach_args *ma = aux; 129 struct mii_data *mii = ma->mii_data; 130 const struct mii_phydesc *mpd; 131 132 mpd = mii_phy_match(ma, nsphyters); 133 aprint_naive(": Media interface\n"); 134 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 135 136 sc->mii_dev = self; 137 sc->mii_inst = mii->mii_instance; 138 sc->mii_phy = ma->mii_phyno; 139 sc->mii_funcs = &nsphyter_funcs; 140 sc->mii_pdata = mii; 141 sc->mii_flags = ma->mii_flags; 142 sc->mii_anegticks = MII_ANEGTICKS; 143 144 PHY_RESET(sc); 145 146 sc->mii_capabilities = 147 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 148 aprint_normal_dev(self, ""); 149 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 150 aprint_error("no media present"); 151 else 152 mii_phy_add_media(sc); 153 aprint_normal("\n"); 154 } 155 156 static int 157 nsphyter_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 switch (cmd) { 163 case MII_POLLSTAT: 164 /* 165 * If we're not polling our PHY instance, just return. 166 */ 167 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 168 return (0); 169 break; 170 171 case MII_MEDIACHG: 172 /* 173 * If the media indicates a different PHY instance, 174 * isolate ourselves. 175 */ 176 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 177 reg = PHY_READ(sc, MII_BMCR); 178 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 179 return (0); 180 } 181 182 /* 183 * If the interface is not up, don't do anything. 184 */ 185 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 186 break; 187 188 mii_phy_setmedia(sc); 189 break; 190 191 case MII_TICK: 192 /* 193 * If we're not currently selected, just return. 194 */ 195 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 196 return (0); 197 198 if (mii_phy_tick(sc) == EJUSTRETURN) 199 return (0); 200 break; 201 202 case MII_DOWN: 203 mii_phy_down(sc); 204 return (0); 205 } 206 207 /* Update the media status. */ 208 mii_phy_status(sc); 209 210 /* Callback if something changed. */ 211 mii_phy_update(sc, cmd); 212 return (0); 213 } 214 215 static void 216 nsphyter_status(struct mii_softc *sc) 217 { 218 struct mii_data *mii = sc->mii_pdata; 219 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 220 int bmsr, bmcr, physts; 221 222 mii->mii_media_status = IFM_AVALID; 223 mii->mii_media_active = IFM_ETHER; 224 225 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 226 physts = PHY_READ(sc, MII_NSPHYTER_PHYSTS); 227 228 if (physts & PHYSTS_LINK) 229 mii->mii_media_status |= IFM_ACTIVE; 230 231 bmcr = PHY_READ(sc, MII_BMCR); 232 if (bmcr & BMCR_ISO) { 233 mii->mii_media_active |= IFM_NONE; 234 mii->mii_media_status = 0; 235 return; 236 } 237 238 if (bmcr & BMCR_LOOP) 239 mii->mii_media_active |= IFM_LOOP; 240 241 if (bmcr & BMCR_AUTOEN) { 242 /* 243 * The media status bits are only valid of autonegotiation 244 * has completed (or it's disabled). 245 */ 246 if ((bmsr & BMSR_ACOMP) == 0) { 247 /* Erg, still trying, I guess... */ 248 mii->mii_media_active |= IFM_NONE; 249 return; 250 } 251 252 if (physts & PHYSTS_SPEED10) 253 mii->mii_media_active |= IFM_10_T; 254 else 255 mii->mii_media_active |= IFM_100_TX; 256 if (physts & PHYSTS_DUPLEX) 257 mii->mii_media_active |= 258 IFM_FDX | mii_phy_flowstatus(sc); 259 } else 260 mii->mii_media_active = ife->ifm_media; 261 } 262 263 void 264 nsphyter_reset(struct mii_softc *sc) 265 { 266 int reg, i; 267 268 if (sc->mii_flags & MIIF_NOISOLATE) 269 reg = BMCR_RESET; 270 else 271 reg = BMCR_RESET | BMCR_ISO; 272 PHY_WRITE(sc, MII_BMCR, reg); 273 274 /* 275 * It is best to allow a little time for the reset to settle 276 * in before we start polling the BMCR again. Notably, the 277 * DP83840A manual states that there should be a 500us delay 278 * between asserting software reset and attempting MII serial 279 * operations. Also, a DP83815 can get into a bad state on 280 * cable removal and reinsertion if we do not delay here. 281 */ 282 delay(500); 283 284 /* Wait another 100ms for it to complete. */ 285 for (i = 0; i < 100; i++) { 286 reg = PHY_READ(sc, MII_BMCR); 287 if ((reg & BMCR_RESET) == 0) 288 break; 289 delay(1000); 290 } 291 292 if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) 293 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 294 } 295