tdkphy.c revision 129844
1/* 2 * Copyright (c) 2000,2001 Jonathan Chen. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions, and the following disclaimer, 10 * without modification, immediately at the beginning of the file. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in 13 * the documentation and/or other materials provided with the 14 * distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: head/sys/dev/mii/tdkphy.c 129844 2004-05-29 18:09:10Z marius $"); 31 32/* 33 * Driver for the TDK 78Q2120 MII 34 * 35 * References: 36 * Datasheet for the 78Q2120 - http://www.tsc.tdk.com/lan/78q2120.pdf 37 * Most of this code stolen from ukphy.c 38 */ 39 40/* 41 * The TDK 78Q2120 is found on some Xircom X3201 based cardbus cards. It's just 42 * like any other normal phy, except it does auto negotiation in a different 43 * way. 44 */ 45 46#include <sys/param.h> 47#include <sys/systm.h> 48#include <sys/kernel.h> 49#include <sys/socket.h> 50#include <sys/errno.h> 51#include <sys/module.h> 52#include <sys/bus.h> 53 54#include <net/if.h> 55#include <net/if_media.h> 56 57#include <machine/clock.h> 58 59#include <dev/mii/mii.h> 60#include <dev/mii/miivar.h> 61#include "miidevs.h" 62 63#include <dev/mii/tdkphyreg.h> 64 65#include "miibus_if.h" 66 67#if 0 68#if !defined(lint) 69static const char rcsid[] = 70 "$Id: tdkphy.c,v 1.3 2000/10/14 06:20:56 jon Exp $"; 71#endif 72#endif 73 74static int tdkphy_probe(device_t); 75static int tdkphy_attach(device_t); 76 77static device_method_t tdkphy_methods[] = { 78 /* device interface */ 79 DEVMETHOD(device_probe, tdkphy_probe), 80 DEVMETHOD(device_attach, tdkphy_attach), 81 DEVMETHOD(device_detach, mii_phy_detach), 82 DEVMETHOD(device_shutdown, bus_generic_shutdown), 83 { 0, 0 } 84}; 85 86static devclass_t tdkphy_devclass; 87 88static driver_t tdkphy_driver = { 89 "tdkphy", 90 tdkphy_methods, 91 sizeof(struct mii_softc) 92}; 93 94DRIVER_MODULE(tdkphy, miibus, tdkphy_driver, tdkphy_devclass, 0, 0); 95 96static int tdkphy_service(struct mii_softc *, struct mii_data *, int); 97static void tdkphy_status(struct mii_softc *); 98 99static int 100tdkphy_probe(device_t dev) 101{ 102 struct mii_attach_args *ma; 103 ma = device_get_ivars(dev); 104 if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_TDK || 105 MII_MODEL(ma->mii_id2) != MII_MODEL_TDK_78Q2120)) 106 return (ENXIO); 107 108 device_set_desc(dev, MII_STR_TDK_78Q2120); 109 return (0); 110} 111 112static int 113tdkphy_attach(device_t dev) 114{ 115 struct mii_softc *sc; 116 struct mii_attach_args *ma; 117 struct mii_data *mii; 118 sc = device_get_softc(dev); 119 ma = device_get_ivars(dev); 120 sc->mii_dev = device_get_parent(dev); 121 mii = device_get_softc(sc->mii_dev); 122 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 123 124 if (bootverbose) 125 device_printf(dev, "OUI 0x%06x, model 0x%04x, rev. %d\n", 126 MII_OUI(ma->mii_id1, ma->mii_id2), 127 MII_MODEL(ma->mii_id2), MII_REV(ma->mii_id2)); 128 129 sc->mii_inst = mii->mii_instance; 130 sc->mii_phy = ma->mii_phyno; 131 sc->mii_service = tdkphy_service; 132 sc->mii_pdata = mii; 133 134 mii->mii_instance++; 135 136 sc->mii_flags |= MIIF_NOISOLATE; 137 138#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 139 140 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 141 BMCR_ISO); 142#if 0 143 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 144 BMCR_LOOP|BMCR_S100); 145#endif 146 147 mii_phy_reset(sc); 148 149 sc->mii_capabilities = 150 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 151 device_printf(dev, " "); 152 mii_add_media(sc); 153 printf("\n"); 154#undef ADD 155 156 MIIBUS_MEDIAINIT(sc->mii_dev); 157 158 return(0); 159} 160 161static int 162tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 163{ 164 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 165 int reg; 166 167 switch (cmd) { 168 case MII_POLLSTAT: 169 /* 170 * If we're not polling our PHY instance, just return. 171 */ 172 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 173 return (0); 174 break; 175 176 case MII_MEDIACHG: 177 /* 178 * If the media indicates a different PHY instance, 179 * isolate ourselves. 180 */ 181 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 182 reg = PHY_READ(sc, MII_BMCR); 183 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 184 return (0); 185 } 186 187 /* 188 * If the interface is not up, don't do anything. 189 */ 190 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 191 break; 192 193 switch (IFM_SUBTYPE(ife->ifm_media)) { 194 case IFM_AUTO: 195 /* 196 * If we're already in auto mode, just return. 197 */ 198 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 199 return (0); 200 (void) mii_phy_auto(sc); 201 break; 202 case IFM_100_T4: 203 /* 204 * Not supported on MII 205 */ 206 return (EINVAL); 207 default: 208 /* 209 * BMCR data is stored in the ifmedia entry. 210 */ 211 PHY_WRITE(sc, MII_ANAR, 212 mii_anar(ife->ifm_media)); 213 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 214 } 215 break; 216 217 case MII_TICK: 218 /* 219 * If we're not currently selected, just return. 220 */ 221 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 222 return (0); 223 if (mii_phy_tick(sc) == EJUSTRETURN) 224 return (0); 225 break; 226 } 227 228 /* Update the media status. */ 229 tdkphy_status(sc); 230 if (sc->mii_pdata->mii_media_active & IFM_FDX) 231 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX); 232 else 233 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX); 234 235 /* Callback if something changed. */ 236 mii_phy_update(sc, cmd); 237 return (0); 238} 239 240static void 241tdkphy_status(struct mii_softc *phy) 242{ 243 struct mii_data *mii = phy->mii_pdata; 244 int bmsr, bmcr, anlpar, diag; 245 246 mii->mii_media_status = IFM_AVALID; 247 mii->mii_media_active = IFM_ETHER; 248 249 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 250 if (bmsr & BMSR_LINK) 251 mii->mii_media_status |= IFM_ACTIVE; 252 253 bmcr = PHY_READ(phy, MII_BMCR); 254 if (bmcr & BMCR_ISO) { 255 mii->mii_media_active |= IFM_NONE; 256 mii->mii_media_status = 0; 257 return; 258 } 259 260 if (bmcr & BMCR_LOOP) 261 mii->mii_media_active |= IFM_LOOP; 262 263 if (bmcr & BMCR_AUTOEN) { 264 /* 265 * NWay autonegotiation takes the highest-order common 266 * bit of the ANAR and ANLPAR (i.e. best media advertised 267 * both by us and our link partner). 268 */ 269 if ((bmsr & BMSR_ACOMP) == 0) { 270 /* Erg, still trying, I guess... */ 271 mii->mii_media_active |= IFM_NONE; 272 return; 273 } 274 275 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR); 276 /* 277 * ANLPAR doesn't get set on my card, but we check it anyway, 278 * since it is mentioned in the 78Q2120 specs. 279 */ 280 if (anlpar & ANLPAR_T4) 281 mii->mii_media_active |= IFM_100_T4; 282 else if (anlpar & ANLPAR_TX_FD) 283 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 284 else if (anlpar & ANLPAR_TX) 285 mii->mii_media_active |= IFM_100_TX; 286 else if (anlpar & ANLPAR_10_FD) 287 mii->mii_media_active |= IFM_10_T|IFM_FDX; 288 else if (anlpar & ANLPAR_10) 289 mii->mii_media_active |= IFM_10_T; 290 else { 291 /* 292 * ANLPAR isn't set, which leaves two possibilities: 293 * 1) Auto negotiation failed 294 * 2) Auto negotiation completed, but the card forgot 295 * to set ANLPAR. 296 * So we check the MII_DIAG(18) register... 297 */ 298 diag = PHY_READ(phy, MII_DIAG); 299 if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */ 300 mii->mii_media_active |= IFM_10_T; 301 else { 302 if (diag & DIAG_DUPLEX) 303 mii->mii_media_active |= IFM_FDX; 304 if (diag & DIAG_RATE_100) 305 mii->mii_media_active |= IFM_100_TX; 306 else 307 mii->mii_media_active |= IFM_10_T; 308 } 309 } 310 } else { 311 mii->mii_media_active = mii_media_from_bmcr(bmcr); 312 } 313} 314