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 National Semiconductor's DP83843 `PHYTER' ethernet 10/100 PHY 62 * Data Sheet available from www.national.com 63 * 64 * We also support the DP83815 `MacPHYTER' internal PHY since, for our 65 * purposes, they are compatible. 66 */ 67 68 #include <sys/param.h> 69 #include <sys/systm.h> 70 #include <sys/bus.h> 71 #include <sys/errno.h> 72 #include <sys/kernel.h> 73 #include <sys/module.h> 74 #include <sys/socket.h> 75 76 #include <net/if.h> 77 #include <net/if_media.h> 78 79 #include <dev/mii/mii.h> 80 #include <dev/mii/miivar.h> 81 #include "miidevs.h" 82 83 #include <dev/mii/nsphyterreg.h> 84 85 #include "miibus_if.h" 86 87 static device_probe_t nsphyter_probe; 88 static device_attach_t nsphyter_attach; 89 90 static device_method_t nsphyter_methods[] = { 91 /* device interface */ 92 DEVMETHOD(device_probe, nsphyter_probe), 93 DEVMETHOD(device_attach, nsphyter_attach), 94 DEVMETHOD(device_detach, mii_phy_detach), 95 DEVMETHOD(device_shutdown, bus_generic_shutdown), 96 DEVMETHOD_END 97 }; 98 99 static devclass_t nsphyter_devclass; 100 101 static driver_t nsphyter_driver = { 102 "nsphyter", 103 nsphyter_methods, 104 sizeof(struct mii_softc) 105 }; 106 107 DRIVER_MODULE(nsphyter, miibus, nsphyter_driver, nsphyter_devclass, 0, 0); 108 109 static int nsphyter_service(struct mii_softc *, struct mii_data *, int); 110 static void nsphyter_status(struct mii_softc *); 111 static void nsphyter_reset(struct mii_softc *); 112 113 static const struct mii_phydesc nsphyters[] = { 114 MII_PHY_DESC(xxNATSEMI, DP83815), 115 MII_PHY_DESC(xxNATSEMI, DP83843), 116 MII_PHY_DESC(xxNATSEMI, DP83847), 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 /* 151 * If the interface is not up, don't do anything. 152 */ 153 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 154 break; 155 156 mii_phy_setmedia(sc); 157 break; 158 159 case MII_TICK: 160 if (mii_phy_tick(sc) == EJUSTRETURN) 161 return (0); 162 break; 163 } 164 165 /* Update the media status. */ 166 PHY_STATUS(sc); 167 168 /* Callback if something changed. */ 169 mii_phy_update(sc, cmd); 170 return (0); 171 } 172 173 static void 174 nsphyter_status(struct mii_softc *sc) 175 { 176 struct mii_data *mii = sc->mii_pdata; 177 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 178 int bmsr, bmcr, physts; 179 180 mii->mii_media_status = IFM_AVALID; 181 mii->mii_media_active = IFM_ETHER; 182 183 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 184 physts = PHY_READ(sc, MII_NSPHYTER_PHYSTS); 185 186 if ((physts & PHYSTS_LINK) != 0) 187 mii->mii_media_status |= IFM_ACTIVE; 188 189 bmcr = PHY_READ(sc, MII_BMCR); 190 if ((bmcr & BMCR_ISO) != 0) { 191 mii->mii_media_active |= IFM_NONE; 192 mii->mii_media_status = 0; 193 return; 194 } 195 196 if ((bmcr & BMCR_LOOP) != 0) 197 mii->mii_media_active |= IFM_LOOP; 198 199 if ((bmcr & BMCR_AUTOEN) != 0) { 200 /* 201 * The media status bits are only valid if autonegotiation 202 * has completed (or it's disabled). 203 */ 204 if ((bmsr & BMSR_ACOMP) == 0) { 205 /* Erg, still trying, I guess... */ 206 mii->mii_media_active |= IFM_NONE; 207 return; 208 } 209 210 if ((physts & PHYSTS_SPEED10) != 0) 211 mii->mii_media_active |= IFM_10_T; 212 else 213 mii->mii_media_active |= IFM_100_TX; 214 if ((physts & PHYSTS_DUPLEX) != 0) 215 mii->mii_media_active |= 216 IFM_FDX | mii_phy_flowstatus(sc); 217 else 218 mii->mii_media_active |= IFM_HDX; 219 } else 220 mii->mii_media_active = ife->ifm_media; 221 } 222 223 static void 224 nsphyter_reset(struct mii_softc *sc) 225 { 226 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 227 int reg, i; 228 229 if ((sc->mii_flags & MIIF_NOISOLATE) != 0) 230 reg = BMCR_RESET; 231 else 232 reg = BMCR_RESET | BMCR_ISO; 233 PHY_WRITE(sc, MII_BMCR, reg); 234 235 /* 236 * It is best to allow a little time for the reset to settle 237 * in before we start polling the BMCR again. Notably, the 238 * DP8384{3,7} manuals state that there should be a 500us delay 239 * between asserting software reset and attempting MII serial 240 * operations. Be conservative. Also, a DP83815 can get into 241 * a bad state on cable removal and reinsertion if we do not 242 * delay here. 243 */ 244 DELAY(1000); 245 246 /* 247 * Wait another 2s for it to complete. 248 * This is only a little overkill as under normal circumstances 249 * the PHY can take up to 1s to complete reset. 250 * This is also a bit odd because after a reset, the BMCR will 251 * clear the reset bit and simply reports 0 even though the reset 252 * is not yet complete. 253 */ 254 for (i = 0; i < 1000; i++) { 255 reg = PHY_READ(sc, MII_BMCR); 256 if (reg != 0 && (reg & BMCR_RESET) == 0) 257 break; 258 DELAY(2000); 259 } 260 261 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) { 262 if ((ife == NULL && sc->mii_inst != 0) || 263 (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst)) 264 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 265 } 266 } 267