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 mii_phy_setmedia(sc); 153 break; 154 155 case MII_TICK: 156 if (mii_phy_tick(sc) == EJUSTRETURN) 157 return (0); 158 break; 159 } 160 161 /* Update the media status. */ 162 PHY_STATUS(sc); 163 164 /* Callback if something changed. */ 165 mii_phy_update(sc, cmd); 166 return (0); 167} 168 169static void 170nsphyter_status(struct mii_softc *sc) 171{ 172 struct mii_data *mii = sc->mii_pdata; 173 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 174 int bmsr, bmcr, physts; 175 176 mii->mii_media_status = IFM_AVALID; 177 mii->mii_media_active = IFM_ETHER; 178 179 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 180 physts = PHY_READ(sc, MII_NSPHYTER_PHYSTS); 181 182 if ((physts & PHYSTS_LINK) != 0) 183 mii->mii_media_status |= IFM_ACTIVE; 184 185 bmcr = PHY_READ(sc, MII_BMCR); 186 if ((bmcr & BMCR_ISO) != 0) { 187 mii->mii_media_active |= IFM_NONE; 188 mii->mii_media_status = 0; 189 return; 190 } 191 192 if ((bmcr & BMCR_LOOP) != 0) 193 mii->mii_media_active |= IFM_LOOP; 194 195 if ((bmcr & BMCR_AUTOEN) != 0) { 196 /* 197 * The media status bits are only valid if autonegotiation 198 * has completed (or it's disabled). 199 */ 200 if ((bmsr & BMSR_ACOMP) == 0) { 201 /* Erg, still trying, I guess... */ 202 mii->mii_media_active |= IFM_NONE; 203 return; 204 } 205 206 if ((physts & PHYSTS_SPEED10) != 0) 207 mii->mii_media_active |= IFM_10_T; 208 else 209 mii->mii_media_active |= IFM_100_TX; 210 if ((physts & PHYSTS_DUPLEX) != 0) 211 mii->mii_media_active |= 212 IFM_FDX | mii_phy_flowstatus(sc); 213 else 214 mii->mii_media_active |= IFM_HDX; 215 } else 216 mii->mii_media_active = ife->ifm_media; 217} 218 219static void 220nsphyter_reset(struct mii_softc *sc) 221{ 222 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 223 int reg, i; 224 225 if ((sc->mii_flags & MIIF_NOISOLATE) != 0) 226 reg = BMCR_RESET; 227 else 228 reg = BMCR_RESET | BMCR_ISO; 229 PHY_WRITE(sc, MII_BMCR, reg); 230 231 /* 232 * It is best to allow a little time for the reset to settle 233 * in before we start polling the BMCR again. Notably, the 234 * DP8384{3,7} manuals state that there should be a 500us delay 235 * between asserting software reset and attempting MII serial 236 * operations. Be conservative. Also, a DP83815 can get into 237 * a bad state on cable removal and reinsertion if we do not 238 * delay here. 239 */ 240 DELAY(1000); 241 242 /* 243 * Wait another 2s for it to complete. 244 * This is only a little overkill as under normal circumstances 245 * the PHY can take up to 1s to complete reset. 246 * This is also a bit odd because after a reset, the BMCR will 247 * clear the reset bit and simply reports 0 even though the reset 248 * is not yet complete. 249 */ 250 for (i = 0; i < 1000; i++) { 251 reg = PHY_READ(sc, MII_BMCR); 252 if (reg != 0 && (reg & BMCR_RESET) == 0) 253 break; 254 DELAY(2000); 255 } 256 257 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) { 258 if ((ife == NULL && sc->mii_inst != 0) || 259 (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst)) 260 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 261 } 262} 263