nsphyter.c revision 1.45
1 /* $NetBSD: nsphyter.c,v 1.45 2020/03/15 23:04:50 thorpej 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 1.45 2020/03/15 23:04:50 thorpej 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_PHY_DESC(xxNATSEMI, DP83843), 101 MII_PHY_DESC(xxNATSEMI, DP83847), 102 MII_PHY_DESC(xxNATSEMI, DP83849), 103 MII_PHY_DESC(xxNATSEMI, DP83815), 104 MII_PHY_END, 105 }; 106 107 static int 108 nsphytermatch(device_t parent, cfdata_t match, void *aux) 109 { 110 struct mii_attach_args *ma = aux; 111 112 if (mii_phy_match(ma, nsphyters) != NULL) 113 return 10; 114 115 return 0; 116 } 117 118 static void 119 nsphyterattach(device_t parent, device_t self, void *aux) 120 { 121 struct mii_softc *sc = device_private(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, nsphyters); 127 aprint_naive(": Media interface\n"); 128 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 129 130 sc->mii_dev = self; 131 sc->mii_inst = mii->mii_instance; 132 sc->mii_phy = ma->mii_phyno; 133 sc->mii_funcs = &nsphyter_funcs; 134 sc->mii_pdata = mii; 135 sc->mii_flags = ma->mii_flags; 136 137 mii_lock(mii); 138 139 PHY_RESET(sc); 140 141 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities); 142 sc->mii_capabilities &= ma->mii_capmask; 143 144 mii_unlock(mii); 145 146 mii_phy_add_media(sc); 147 } 148 149 static int 150 nsphyter_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 151 { 152 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 153 uint16_t reg; 154 155 KASSERT(mii_locked(mii)); 156 157 switch (cmd) { 158 case MII_POLLSTAT: 159 /* If we're not polling our PHY instance, just return. */ 160 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 161 return 0; 162 break; 163 164 case MII_MEDIACHG: 165 /* 166 * If the media indicates a different PHY instance, 167 * isolate ourselves. 168 */ 169 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 170 PHY_READ(sc, MII_BMCR, ®); 171 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 172 return 0; 173 } 174 175 /* If the interface is not up, don't do anything. */ 176 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 177 break; 178 179 mii_phy_setmedia(sc); 180 break; 181 182 case MII_TICK: 183 /* If we're not currently selected, just return. */ 184 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 185 return 0; 186 187 if (mii_phy_tick(sc) == EJUSTRETURN) 188 return 0; 189 break; 190 191 case MII_DOWN: 192 mii_phy_down(sc); 193 return 0; 194 } 195 196 /* Update the media status. */ 197 mii_phy_status(sc); 198 199 /* Callback if something changed. */ 200 mii_phy_update(sc, cmd); 201 return 0; 202 } 203 204 static void 205 nsphyter_status(struct mii_softc *sc) 206 { 207 struct mii_data *mii = sc->mii_pdata; 208 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 209 uint16_t bmsr, bmcr, physts; 210 211 KASSERT(mii_locked(mii)); 212 213 mii->mii_media_status = IFM_AVALID; 214 mii->mii_media_active = IFM_ETHER; 215 216 PHY_READ(sc, MII_BMSR, &bmsr); 217 PHY_READ(sc, MII_BMSR, &bmsr); 218 PHY_READ(sc, MII_NSPHYTER_PHYSTS, &physts); 219 220 if (physts & PHYSTS_LINK) 221 mii->mii_media_status |= IFM_ACTIVE; 222 223 PHY_READ(sc, MII_BMCR, &bmcr); 224 if (bmcr & BMCR_ISO) { 225 mii->mii_media_active |= IFM_NONE; 226 mii->mii_media_status = 0; 227 return; 228 } 229 230 if (bmcr & BMCR_LOOP) 231 mii->mii_media_active |= IFM_LOOP; 232 233 if (bmcr & BMCR_AUTOEN) { 234 /* 235 * The media status bits are only valid if autonegotiation 236 * has completed (or it's disabled). 237 */ 238 if ((bmsr & BMSR_ACOMP) == 0) { 239 /* Erg, still trying, I guess... */ 240 mii->mii_media_active |= IFM_NONE; 241 return; 242 } 243 244 if (physts & PHYSTS_SPEED10) 245 mii->mii_media_active |= IFM_10_T; 246 else 247 mii->mii_media_active |= IFM_100_TX; 248 249 if (physts & PHYSTS_DUPLEX) 250 mii->mii_media_active |= 251 IFM_FDX | mii_phy_flowstatus(sc); 252 else 253 mii->mii_media_active |= IFM_HDX; 254 } else 255 mii->mii_media_active = ife->ifm_media; 256 } 257 258 static void 259 nsphyter_reset(struct mii_softc *sc) 260 { 261 int i; 262 uint16_t reg; 263 264 KASSERT(mii_locked(sc->mii_pdata)); 265 266 if (sc->mii_flags & MIIF_NOISOLATE) 267 reg = BMCR_RESET; 268 else 269 reg = BMCR_RESET | BMCR_ISO; 270 PHY_WRITE(sc, MII_BMCR, reg); 271 272 /* 273 * It is best to allow a little time for the reset to settle 274 * in before we start polling the BMCR again. Notably, the 275 * DP83840A manual states that there should be a 500us delay 276 * between asserting software reset and attempting MII serial 277 * operations. Also, a DP83815 can get into a bad state on 278 * cable removal and reinsertion if we do not delay here. 279 */ 280 delay(500); 281 282 /* Wait another 100ms for it to complete. */ 283 for (i = 0; i < 100; i++) { 284 PHY_READ(sc, MII_BMCR, ®); 285 if ((reg & BMCR_RESET) == 0) 286 break; 287 delay(1000); 288 } 289 290 if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) 291 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 292 } 293
Indexes created Tue Sep 30 20:09:53 GMT 2025