1/* $NetBSD: nsphyter.c,v 1.28 2008/01/20 07:58:19 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#include <sys/cdefs.h> 58__FBSDID("$FreeBSD$"); 59 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 88static device_probe_t nsphyter_probe; 89static device_attach_t nsphyter_attach; 90 91static 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 100static devclass_t nsphyter_devclass; 101 102static driver_t nsphyter_driver = { 103 "nsphyter", 104 nsphyter_methods, 105 sizeof(struct mii_softc) 106}; 107 108DRIVER_MODULE(nsphyter, miibus, nsphyter_driver, nsphyter_devclass, 0, 0); 109 110static int nsphyter_service(struct mii_softc *, struct mii_data *, int); 111static void nsphyter_status(struct mii_softc *); 112static void nsphyter_reset(struct mii_softc *); 113 114static const struct mii_phydesc nsphyters[] = { 115 MII_PHY_DESC(xxNATSEMI, DP83815), 116 MII_PHY_DESC(xxNATSEMI, DP83843), 117 MII_PHY_DESC(xxNATSEMI, DP83847), 118 MII_PHY_DESC(xxNATSEMI, DP83849), 119 MII_PHY_END 120}; 121 122static const struct mii_phy_funcs nsphyter_funcs = { 123 nsphyter_service, 124 nsphyter_status, 125 nsphyter_reset 126}; 127 128static int 129nsphyter_probe(device_t dev) 130{ 131 132 return (mii_phy_dev_probe(dev, nsphyters, BUS_PROBE_DEFAULT)); 133} 134 135static int 136nsphyter_attach(device_t dev) 137{ 138 139 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &nsphyter_funcs, 1); 140 return (0); 141} 142 143static int 144nsphyter_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 145{ 146 147 switch (cmd) { 148 case MII_POLLSTAT: 149 break; 150 151 case MII_MEDIACHG: 152 /* 153 * If the interface is not up, don't do anything. 154 */ 155 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 156 break; 157 158 mii_phy_setmedia(sc); 159 break; 160 161 case MII_TICK: 162 if (mii_phy_tick(sc) == EJUSTRETURN) 163 return (0); 164 break; 165 } 166 167 /* Update the media status. */ 168 PHY_STATUS(sc); 169 170 /* Callback if something changed. */ 171 mii_phy_update(sc, cmd); 172 return (0); 173} 174 175static void 176nsphyter_status(struct mii_softc *sc) 177{ 178 struct mii_data *mii = sc->mii_pdata; 179 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 180 int bmsr, bmcr, physts; 181 182 mii->mii_media_status = IFM_AVALID; 183 mii->mii_media_active = IFM_ETHER; 184 185 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 186 physts = PHY_READ(sc, MII_NSPHYTER_PHYSTS); 187 188 if ((physts & PHYSTS_LINK) != 0) 189 mii->mii_media_status |= IFM_ACTIVE; 190 191 bmcr = PHY_READ(sc, MII_BMCR); 192 if ((bmcr & BMCR_ISO) != 0) { 193 mii->mii_media_active |= IFM_NONE; 194 mii->mii_media_status = 0; 195 return; 196 } 197 198 if ((bmcr & BMCR_LOOP) != 0) 199 mii->mii_media_active |= IFM_LOOP; 200 201 if ((bmcr & BMCR_AUTOEN) != 0) { 202 /* 203 * The media status bits are only valid if autonegotiation 204 * has completed (or it's disabled). 205 */ 206 if ((bmsr & BMSR_ACOMP) == 0) { 207 /* Erg, still trying, I guess... */ 208 mii->mii_media_active |= IFM_NONE; 209 return; 210 } 211 212 if ((physts & PHYSTS_SPEED10) != 0) 213 mii->mii_media_active |= IFM_10_T; 214 else 215 mii->mii_media_active |= IFM_100_TX; 216 if ((physts & PHYSTS_DUPLEX) != 0) 217 mii->mii_media_active |= 218 IFM_FDX | mii_phy_flowstatus(sc); 219 else 220 mii->mii_media_active |= IFM_HDX; 221 } else 222 mii->mii_media_active = ife->ifm_media; 223} 224 225static void 226nsphyter_reset(struct mii_softc *sc) 227{ 228 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 229 int reg, i; 230 231 if ((sc->mii_flags & MIIF_NOISOLATE) != 0) 232 reg = BMCR_RESET; 233 else 234 reg = BMCR_RESET | BMCR_ISO; 235 PHY_WRITE(sc, MII_BMCR, reg); 236 237 /* 238 * It is best to allow a little time for the reset to settle 239 * in before we start polling the BMCR again. Notably, the 240 * DP8384{3,7} manuals state that there should be a 500us delay 241 * between asserting software reset and attempting MII serial 242 * operations. Be conservative. Also, a DP83815 can get into 243 * a bad state on cable removal and reinsertion if we do not 244 * delay here. 245 */ 246 DELAY(1000); 247 248 /* 249 * Wait another 2s for it to complete. 250 * This is only a little overkill as under normal circumstances 251 * the PHY can take up to 1s to complete reset. 252 * This is also a bit odd because after a reset, the BMCR will 253 * clear the reset bit and simply reports 0 even though the reset 254 * is not yet complete. 255 */ 256 for (i = 0; i < 1000; i++) { 257 reg = PHY_READ(sc, MII_BMCR); 258 if (reg != 0 && (reg & BMCR_RESET) == 0) 259 break; 260 DELAY(2000); 261 } 262 263 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) { 264 if ((ife == NULL && sc->mii_inst != 0) || 265 (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst)) 266 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 267 } 268} 269