1 /* $NetBSD: nsphyter.c,v 1.28 2008/01/20 07:58:19 msaitoh Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to The NetBSD Foundation 10 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 11 * NASA Ames Research Center. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 /*- 36 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 50 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 51 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 52 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 53 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 54 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 55 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 56 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 57 */ 58 59 #include <sys/cdefs.h> 60 /* 61 * Driver for the National Semiconductor's DP83843, DP83847 and DP83849 62 * `PHYTER' Ethernet 10/100 PHYs 63 * Data Sheets are available from http://www.national.com 64 * 65 * We also support the DP83815 `MacPHYTER' internal PHY since, for our 66 * purposes, they are compatible. 67 */ 68 69 #include <sys/param.h> 70 #include <sys/systm.h> 71 #include <sys/bus.h> 72 #include <sys/errno.h> 73 #include <sys/kernel.h> 74 #include <sys/module.h> 75 #include <sys/socket.h> 76 77 #include <net/if.h> 78 #include <net/if_media.h> 79 80 #include <dev/mii/mii.h> 81 #include <dev/mii/miivar.h> 82 #include "miidevs.h" 83 84 #include <dev/mii/nsphyterreg.h> 85 86 #include "miibus_if.h" 87 88 static device_probe_t nsphyter_probe; 89 static device_attach_t nsphyter_attach; 90 91 static device_method_t nsphyter_methods[] = { 92 /* device interface */ 93 DEVMETHOD(device_probe, nsphyter_probe), 94 DEVMETHOD(device_attach, nsphyter_attach), 95 DEVMETHOD(device_detach, mii_phy_detach), 96 DEVMETHOD(device_shutdown, bus_generic_shutdown), 97 DEVMETHOD_END 98 }; 99 100 static driver_t nsphyter_driver = { 101 "nsphyter", 102 nsphyter_methods, 103 sizeof(struct mii_softc) 104 }; 105 106 DRIVER_MODULE(nsphyter, miibus, nsphyter_driver, 0, 0); 107 108 static int nsphyter_service(struct mii_softc *, struct mii_data *, int); 109 static void nsphyter_status(struct mii_softc *); 110 static void nsphyter_reset(struct mii_softc *); 111 112 static const struct mii_phydesc nsphyters[] = { 113 MII_PHY_DESC(xxNATSEMI, DP83815), 114 MII_PHY_DESC(xxNATSEMI, DP83843), 115 MII_PHY_DESC(xxNATSEMI, DP83847), 116 MII_PHY_DESC(xxNATSEMI, DP83849), 117 MII_PHY_END 118 }; 119 120 static const struct mii_phy_funcs nsphyter_funcs = { 121 nsphyter_service, 122 nsphyter_status, 123 nsphyter_reset 124 }; 125 126 static int 127 nsphyter_probe(device_t dev) 128 { 129 130 return (mii_phy_dev_probe(dev, nsphyters, BUS_PROBE_DEFAULT)); 131 } 132 133 static int 134 nsphyter_attach(device_t dev) 135 { 136 137 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &nsphyter_funcs, 1); 138 return (0); 139 } 140 141 static int 142 nsphyter_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 143 { 144 145 switch (cmd) { 146 case MII_POLLSTAT: 147 break; 148 149 case MII_MEDIACHG: 150 mii_phy_setmedia(sc); 151 break; 152 153 case MII_TICK: 154 if (mii_phy_tick(sc) == EJUSTRETURN) 155 return (0); 156 break; 157 } 158 159 /* Update the media status. */ 160 PHY_STATUS(sc); 161 162 /* Callback if something changed. */ 163 mii_phy_update(sc, cmd); 164 return (0); 165 } 166 167 static void 168 nsphyter_status(struct mii_softc *sc) 169 { 170 struct mii_data *mii = sc->mii_pdata; 171 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 172 int bmsr, bmcr, physts; 173 174 mii->mii_media_status = IFM_AVALID; 175 mii->mii_media_active = IFM_ETHER; 176 177 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 178 physts = PHY_READ(sc, MII_NSPHYTER_PHYSTS); 179 180 if ((physts & PHYSTS_LINK) != 0) 181 mii->mii_media_status |= IFM_ACTIVE; 182 183 bmcr = PHY_READ(sc, MII_BMCR); 184 if ((bmcr & BMCR_ISO) != 0) { 185 mii->mii_media_active |= IFM_NONE; 186 mii->mii_media_status = 0; 187 return; 188 } 189 190 if ((bmcr & BMCR_LOOP) != 0) 191 mii->mii_media_active |= IFM_LOOP; 192 193 if ((bmcr & BMCR_AUTOEN) != 0) { 194 /* 195 * The media status bits are only valid if autonegotiation 196 * has completed (or it's disabled). 197 */ 198 if ((bmsr & BMSR_ACOMP) == 0) { 199 /* Erg, still trying, I guess... */ 200 mii->mii_media_active |= IFM_NONE; 201 return; 202 } 203 204 if ((physts & PHYSTS_SPEED10) != 0) 205 mii->mii_media_active |= IFM_10_T; 206 else 207 mii->mii_media_active |= IFM_100_TX; 208 if ((physts & PHYSTS_DUPLEX) != 0) 209 mii->mii_media_active |= 210 IFM_FDX | mii_phy_flowstatus(sc); 211 else 212 mii->mii_media_active |= IFM_HDX; 213 } else 214 mii->mii_media_active = ife->ifm_media; 215 } 216 217 static void 218 nsphyter_reset(struct mii_softc *sc) 219 { 220 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 221 int reg, i; 222 223 if ((sc->mii_flags & MIIF_NOISOLATE) != 0) 224 reg = BMCR_RESET; 225 else 226 reg = BMCR_RESET | BMCR_ISO; 227 PHY_WRITE(sc, MII_BMCR, reg); 228 229 /* 230 * It is best to allow a little time for the reset to settle 231 * in before we start polling the BMCR again. Notably, the 232 * DP8384{3,7} manuals state that there should be a 500us delay 233 * between asserting software reset and attempting MII serial 234 * operations. Be conservative. Also, a DP83815 can get into 235 * a bad state on cable removal and reinsertion if we do not 236 * delay here. 237 */ 238 DELAY(1000); 239 240 /* 241 * Wait another 2s for it to complete. 242 * This is only a little overkill as under normal circumstances 243 * the PHY can take up to 1s to complete reset. 244 * This is also a bit odd because after a reset, the BMCR will 245 * clear the reset bit and simply reports 0 even though the reset 246 * is not yet complete. 247 */ 248 for (i = 0; i < 1000; i++) { 249 reg = PHY_READ(sc, MII_BMCR); 250 if (reg != 0 && (reg & BMCR_RESET) == 0) 251 break; 252 DELAY(2000); 253 } 254 255 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) { 256 if ((ife == NULL && sc->mii_inst != 0) || 257 (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst)) 258 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 259 } 260 } 261