nsphyter.c revision 215716
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: head/sys/dev/mii/nsphyter.c 215716 2010-11-22 21:24:29Z marius $"); 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 87static device_probe_t nsphyter_probe; 88static device_attach_t nsphyter_attach; 89 90static 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 { 0, 0 } 97}; 98 99static devclass_t nsphyter_devclass; 100 101static driver_t nsphyter_driver = { 102 "nsphyter", 103 nsphyter_methods, 104 sizeof(struct mii_softc) 105}; 106 107DRIVER_MODULE(nsphyter, miibus, nsphyter_driver, nsphyter_devclass, 0, 0); 108 109static int nsphyter_service(struct mii_softc *, struct mii_data *, int); 110static void nsphyter_status(struct mii_softc *); 111static void nsphyter_reset(struct mii_softc *); 112 113static const struct mii_phydesc nsphys[] = { 114 MII_PHY_DESC(NATSEMI, DP83815), 115 MII_PHY_DESC(NATSEMI, DP83843), 116 MII_PHY_DESC(NATSEMI, DP83847), 117 MII_PHY_END 118}; 119 120static int 121nsphyter_probe(device_t dev) 122{ 123 124 return (mii_phy_dev_probe(dev, nsphys, BUS_PROBE_DEFAULT)); 125} 126 127static int 128nsphyter_attach(device_t dev) 129{ 130 struct mii_softc *sc; 131 struct mii_attach_args *ma; 132 struct mii_data *mii; 133 134 sc = device_get_softc(dev); 135 ma = device_get_ivars(dev); 136 sc->mii_dev = device_get_parent(dev); 137 mii = ma->mii_data; 138 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 139 140 sc->mii_flags = miibus_get_flags(dev); 141 sc->mii_inst = mii->mii_instance++; 142 sc->mii_phy = ma->mii_phyno; 143 sc->mii_service = nsphyter_service; 144 sc->mii_pdata = mii; 145 146 sc->mii_flags |= MIIF_NOMANPAUSE; 147 148#if 1 149 150#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 151 152 /* 153 * XXX IFM_LOOP should be handled by mii_phy_add_media() based 154 * on MIIF_NOLOOP. 155 */ 156 if ((sc->mii_flags & MIIF_NOLOOP) == 0) 157 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, 158 sc->mii_inst), MII_MEDIA_100_TX); 159 160#endif 161 162 nsphyter_reset(sc); 163 164 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 165 device_printf(dev, " "); 166 mii_phy_add_media(sc); 167 printf("\n"); 168 169 MIIBUS_MEDIAINIT(sc->mii_dev); 170 return (0); 171} 172 173static int 174nsphyter_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 175{ 176 177 switch (cmd) { 178 case MII_POLLSTAT: 179 break; 180 181 case MII_MEDIACHG: 182 /* 183 * If the interface is not up, don't do anything. 184 */ 185 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 186 break; 187 188 mii_phy_setmedia(sc); 189 break; 190 191 case MII_TICK: 192 if (mii_phy_tick(sc) == EJUSTRETURN) 193 return (0); 194 break; 195 } 196 197 /* Update the media status. */ 198 nsphyter_status(sc); 199 200 /* Callback if something changed. */ 201 mii_phy_update(sc, cmd); 202 return (0); 203} 204 205static void 206nsphyter_status(struct mii_softc *sc) 207{ 208 struct mii_data *mii = sc->mii_pdata; 209 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 210 int bmsr, bmcr, physts; 211 212 mii->mii_media_status = IFM_AVALID; 213 mii->mii_media_active = IFM_ETHER; 214 215 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 216 physts = PHY_READ(sc, MII_NSPHYTER_PHYSTS); 217 218 if ((physts & PHYSTS_LINK) != 0) 219 mii->mii_media_status |= IFM_ACTIVE; 220 221 bmcr = PHY_READ(sc, MII_BMCR); 222 if ((bmcr & BMCR_ISO) != 0) { 223 mii->mii_media_active |= IFM_NONE; 224 mii->mii_media_status = 0; 225 return; 226 } 227 228 if ((bmcr & BMCR_LOOP) != 0) 229 mii->mii_media_active |= IFM_LOOP; 230 231 if ((bmcr & BMCR_AUTOEN) != 0) { 232 /* 233 * The media status bits are only valid if autonegotiation 234 * has completed (or it's disabled). 235 */ 236 if ((bmsr & BMSR_ACOMP) == 0) { 237 /* Erg, still trying, I guess... */ 238 mii->mii_media_active |= IFM_NONE; 239 return; 240 } 241 242 if ((physts & PHYSTS_SPEED10) != 0) 243 mii->mii_media_active |= IFM_10_T; 244 else 245 mii->mii_media_active |= IFM_100_TX; 246 if ((physts & PHYSTS_DUPLEX) != 0) 247 mii->mii_media_active |= 248 IFM_FDX | mii_phy_flowstatus(sc); 249 else 250 mii->mii_media_active |= IFM_HDX; 251 } else 252 mii->mii_media_active = ife->ifm_media; 253} 254 255static void 256nsphyter_reset(struct mii_softc *sc) 257{ 258 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 259 int reg, i; 260 261 if ((sc->mii_flags & MIIF_NOISOLATE) != 0) 262 reg = BMCR_RESET; 263 else 264 reg = BMCR_RESET | BMCR_ISO; 265 PHY_WRITE(sc, MII_BMCR, reg); 266 267 /* 268 * It is best to allow a little time for the reset to settle 269 * in before we start polling the BMCR again. Notably, the 270 * DP8384{3,7} manuals state that there should be a 500us delay 271 * between asserting software reset and attempting MII serial 272 * operations. Be conservative. Also, a DP83815 can get into 273 * a bad state on cable removal and reinsertion if we do not 274 * delay here. 275 */ 276 DELAY(1000); 277 278 /* 279 * Wait another 2s for it to complete. 280 * This is only a little overkill as under normal circumstances 281 * the PHY can take up to 1s to complete reset. 282 * This is also a bit odd because after a reset, the BMCR will 283 * clear the reset bit and simply reports 0 even though the reset 284 * is not yet complete. 285 */ 286 for (i = 0; i < 1000; i++) { 287 reg = PHY_READ(sc, MII_BMCR); 288 if (reg != 0 && (reg & BMCR_RESET) == 0) 289 break; 290 DELAY(2000); 291 } 292 293 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) { 294 if ((ife == NULL && sc->mii_inst != 0) || 295 (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst)) 296 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 297 } 298} 299