tdkphy.c revision 106107
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 * $FreeBSD: head/sys/dev/mii/tdkphy.c 106107 2002-10-29 00:20:47Z semenu $ 29 */ 30 31/* 32 * Driver for the TDK 78Q2120 MII 33 * 34 * References: 35 * Datasheet for the 78Q2120 - http://www.tsc.tdk.com/lan/78q2120.pdf 36 * Most of this code stolen from ukphy.c 37 */ 38 39/* 40 * The TDK 78Q2120 is found on some Xircom X3201 based cardbus cards. It's just 41 * like any other normal phy, except it does auto negotiation in a different 42 * way. 43 */ 44 45#include <sys/param.h> 46#include <sys/systm.h> 47#include <sys/kernel.h> 48#include <sys/socket.h> 49#include <sys/errno.h> 50#include <sys/module.h> 51#include <sys/bus.h> 52 53#include <net/if.h> 54#include <net/if_media.h> 55 56#include <machine/clock.h> 57 58#include <dev/mii/mii.h> 59#include <dev/mii/miivar.h> 60#include <dev/mii/miidevs.h> 61 62#include <dev/mii/tdkphyreg.h> 63 64#include "miibus_if.h" 65 66#if !defined(lint) 67static const char rcsid[] = 68 "$Id: tdkphy.c,v 1.3 2000/10/14 06:20:56 jon Exp $"; 69#endif 70 71static int tdkphy_probe(device_t); 72static int tdkphy_attach(device_t); 73 74static device_method_t tdkphy_methods[] = { 75 /* device interface */ 76 DEVMETHOD(device_probe, tdkphy_probe), 77 DEVMETHOD(device_attach, tdkphy_attach), 78 DEVMETHOD(device_detach, mii_phy_detach), 79 DEVMETHOD(device_shutdown, bus_generic_shutdown), 80 { 0, 0 } 81}; 82 83static devclass_t tdkphy_devclass; 84 85static driver_t tdkphy_driver = { 86 "tdkphy", 87 tdkphy_methods, 88 sizeof(struct mii_softc) 89}; 90 91DRIVER_MODULE(tdkphy, miibus, tdkphy_driver, tdkphy_devclass, 0, 0); 92 93static int tdkphy_service(struct mii_softc *, struct mii_data *, int); 94static void tdkphy_status(struct mii_softc *); 95 96static int 97tdkphy_probe(device_t dev) 98{ 99 struct mii_attach_args *ma; 100 ma = device_get_ivars(dev); 101 if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_TDK || 102 MII_MODEL(ma->mii_id2) != MII_MODEL_TDK_78Q2120)) 103 return (ENXIO); 104 105 device_set_desc(dev, MII_STR_TDK_78Q2120); 106 return (0); 107} 108 109static int 110tdkphy_attach(device_t dev) 111{ 112 struct mii_softc *sc; 113 struct mii_attach_args *ma; 114 struct mii_data *mii; 115 sc = device_get_softc(dev); 116 ma = device_get_ivars(dev); 117 sc->mii_dev = device_get_parent(dev); 118 mii = device_get_softc(sc->mii_dev); 119 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 120 121 if (bootverbose) 122 device_printf(dev, "OUI 0x%06x, model 0x%04x, rev. %d\n", 123 MII_OUI(ma->mii_id1, ma->mii_id2), 124 MII_MODEL(ma->mii_id2), MII_REV(ma->mii_id2)); 125 126 sc->mii_inst = mii->mii_instance; 127 sc->mii_phy = ma->mii_phyno; 128 sc->mii_service = tdkphy_service; 129 sc->mii_pdata = mii; 130 131 mii->mii_instance++; 132 133 sc->mii_flags |= MIIF_NOISOLATE; 134 135#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 136 137 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 138 BMCR_ISO); 139#if 0 140 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 141 BMCR_LOOP|BMCR_S100); 142#endif 143 144 mii_phy_reset(sc); 145 146 sc->mii_capabilities = 147 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 148 device_printf(dev, " "); 149 mii_add_media(sc); 150 printf("\n"); 151#undef ADD 152 153 MIIBUS_MEDIAINIT(sc->mii_dev); 154 155 return(0); 156} 157 158static int 159tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 160{ 161 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 162 int reg; 163 164 switch (cmd) { 165 case MII_POLLSTAT: 166 /* 167 * If we're not polling our PHY instance, just return. 168 */ 169 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 170 return (0); 171 break; 172 173 case MII_MEDIACHG: 174 /* 175 * If the media indicates a different PHY instance, 176 * isolate ourselves. 177 */ 178 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 179 reg = PHY_READ(sc, MII_BMCR); 180 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 181 return (0); 182 } 183 184 /* 185 * If the interface is not up, don't do anything. 186 */ 187 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 188 break; 189 190 switch (IFM_SUBTYPE(ife->ifm_media)) { 191 case IFM_AUTO: 192 /* 193 * If we're already in auto mode, just return. 194 */ 195 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 196 return (0); 197 (void) mii_phy_auto(sc); 198 break; 199 case IFM_100_T4: 200 /* 201 * Not supported on MII 202 */ 203 return (EINVAL); 204 default: 205 /* 206 * BMCR data is stored in the ifmedia entry. 207 */ 208 PHY_WRITE(sc, MII_ANAR, 209 mii_anar(ife->ifm_media)); 210 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 211 } 212 break; 213 214 case MII_TICK: 215 /* 216 * If we're not currently selected, just return. 217 */ 218 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 219 return (0); 220 if (mii_phy_tick(sc) == EJUSTRETURN) 221 return (0); 222 break; 223 } 224 225 /* Update the media status. */ 226 tdkphy_status(sc); 227 if (sc->mii_pdata->mii_media_active & IFM_FDX) 228 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX); 229 else 230 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX); 231 232 /* Callback if something changed. */ 233 mii_phy_update(sc, cmd); 234 return (0); 235} 236 237static void 238tdkphy_status(struct mii_softc *phy) 239{ 240 struct mii_data *mii = phy->mii_pdata; 241 int bmsr, bmcr, anlpar, diag; 242 243 mii->mii_media_status = IFM_AVALID; 244 mii->mii_media_active = IFM_ETHER; 245 246 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 247 if (bmsr & BMSR_LINK) 248 mii->mii_media_status |= IFM_ACTIVE; 249 250 bmcr = PHY_READ(phy, MII_BMCR); 251 if (bmcr & BMCR_ISO) { 252 mii->mii_media_active |= IFM_NONE; 253 mii->mii_media_status = 0; 254 return; 255 } 256 257 if (bmcr & BMCR_LOOP) 258 mii->mii_media_active |= IFM_LOOP; 259 260 if (bmcr & BMCR_AUTOEN) { 261 /* 262 * NWay autonegotiation takes the highest-order common 263 * bit of the ANAR and ANLPAR (i.e. best media advertised 264 * both by us and our link partner). 265 */ 266 if ((bmsr & BMSR_ACOMP) == 0) { 267 /* Erg, still trying, I guess... */ 268 mii->mii_media_active |= IFM_NONE; 269 return; 270 } 271 272 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR); 273 /* 274 * ANLPAR doesn't get set on my card, but we check it anyway, 275 * since it is mentioned in the 78Q2120 specs. 276 */ 277 if (anlpar & ANLPAR_T4) 278 mii->mii_media_active |= IFM_100_T4; 279 else if (anlpar & ANLPAR_TX_FD) 280 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 281 else if (anlpar & ANLPAR_TX) 282 mii->mii_media_active |= IFM_100_TX; 283 else if (anlpar & ANLPAR_10_FD) 284 mii->mii_media_active |= IFM_10_T|IFM_FDX; 285 else if (anlpar & ANLPAR_10) 286 mii->mii_media_active |= IFM_10_T; 287 else { 288 /* 289 * ANLPAR isn't set, which leaves two possibilities: 290 * 1) Auto negotiation failed 291 * 2) Auto negotiation completed, but the card forgot 292 * to set ANLPAR. 293 * So we check the MII_DIAG(18) register... 294 */ 295 diag = PHY_READ(phy, MII_DIAG); 296 if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */ 297 mii->mii_media_active |= IFM_10_T; 298 else { 299 if (diag & DIAG_DUPLEX) 300 mii->mii_media_active |= IFM_FDX; 301 if (diag & DIAG_RATE_100) 302 mii->mii_media_active |= IFM_100_TX; 303 else 304 mii->mii_media_active |= IFM_10_T; 305 } 306 } 307 } else { 308 mii->mii_media_active = mii_media_from_bmcr(bmcr); 309 } 310} 311