tdkphy.c revision 164830
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 164830 2006-12-02 19:36:25Z 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, 42 * also spotted on some 3C575 cards. It's just like any other normal 43 * phy, except it does auto negotiation in a different 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 <dev/mii/mii.h> 58#include <dev/mii/miivar.h> 59#include "miidevs.h" 60 61#include <dev/mii/tdkphyreg.h> 62 63#include "miibus_if.h" 64 65static int tdkphy_probe(device_t); 66static int tdkphy_attach(device_t); 67 68static device_method_t tdkphy_methods[] = { 69 /* device interface */ 70 DEVMETHOD(device_probe, tdkphy_probe), 71 DEVMETHOD(device_attach, tdkphy_attach), 72 DEVMETHOD(device_detach, mii_phy_detach), 73 DEVMETHOD(device_shutdown, bus_generic_shutdown), 74 { 0, 0 } 75}; 76 77static devclass_t tdkphy_devclass; 78 79static driver_t tdkphy_driver = { 80 "tdkphy", 81 tdkphy_methods, 82 sizeof(struct mii_softc) 83}; 84 85DRIVER_MODULE(tdkphy, miibus, tdkphy_driver, tdkphy_devclass, 0, 0); 86 87static int tdkphy_service(struct mii_softc *, struct mii_data *, int); 88static void tdkphy_status(struct mii_softc *); 89 90static const struct mii_phydesc tdkphys[] = { 91 MII_PHY_DESC(TDK, 78Q2120), 92 MII_PHY_END 93}; 94 95static int 96tdkphy_probe(device_t dev) 97{ 98 99 return (mii_phy_dev_probe(dev, tdkphys, BUS_PROBE_DEFAULT)); 100} 101 102static int 103tdkphy_attach(device_t dev) 104{ 105 struct mii_softc *sc; 106 struct mii_attach_args *ma; 107 struct mii_data *mii; 108 sc = device_get_softc(dev); 109 ma = device_get_ivars(dev); 110 sc->mii_dev = device_get_parent(dev); 111 mii = device_get_softc(sc->mii_dev); 112 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 113 114 if (bootverbose) 115 device_printf(dev, "OUI 0x%06x, model 0x%04x, rev. %d\n", 116 MII_OUI(ma->mii_id1, ma->mii_id2), 117 MII_MODEL(ma->mii_id2), MII_REV(ma->mii_id2)); 118 119 sc->mii_inst = mii->mii_instance; 120 sc->mii_phy = ma->mii_phyno; 121 sc->mii_service = tdkphy_service; 122 sc->mii_pdata = mii; 123 124 mii->mii_instance++; 125 126 sc->mii_flags |= MIIF_NOISOLATE; 127 128#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 129 130 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 131 BMCR_ISO); 132#if 0 133 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 134 BMCR_LOOP|BMCR_S100); 135#endif 136 137 mii_phy_reset(sc); 138 139 sc->mii_capabilities = 140 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 141 device_printf(dev, " "); 142 mii_add_media(sc); 143 printf("\n"); 144#undef ADD 145 146 MIIBUS_MEDIAINIT(sc->mii_dev); 147 return (0); 148} 149 150static int 151tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 152{ 153 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 154 int reg; 155 156 switch (cmd) { 157 case MII_POLLSTAT: 158 /* 159 * If we're not polling our PHY instance, just return. 160 */ 161 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 162 return (0); 163 break; 164 165 case MII_MEDIACHG: 166 /* 167 * If the media indicates a different PHY instance, 168 * isolate ourselves. 169 */ 170 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 171 reg = PHY_READ(sc, MII_BMCR); 172 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 173 return (0); 174 } 175 176 /* 177 * If the interface is not up, don't do anything. 178 */ 179 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 180 break; 181 182 switch (IFM_SUBTYPE(ife->ifm_media)) { 183 case IFM_AUTO: 184 /* 185 * If we're already in auto mode, just return. 186 */ 187 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 188 return (0); 189 (void) mii_phy_auto(sc); 190 break; 191 case IFM_100_T4: 192 /* 193 * Not supported on MII 194 */ 195 return (EINVAL); 196 default: 197 /* 198 * BMCR data is stored in the ifmedia entry. 199 */ 200 PHY_WRITE(sc, MII_ANAR, 201 mii_anar(ife->ifm_media)); 202 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 203 } 204 break; 205 206 case MII_TICK: 207 /* 208 * If we're not currently selected, just return. 209 */ 210 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 211 return (0); 212 if (mii_phy_tick(sc) == EJUSTRETURN) 213 return (0); 214 break; 215 } 216 217 /* Update the media status. */ 218 tdkphy_status(sc); 219 if (sc->mii_pdata->mii_media_active & IFM_FDX) 220 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX); 221 else 222 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX); 223 224 /* Callback if something changed. */ 225 mii_phy_update(sc, cmd); 226 return (0); 227} 228 229static void 230tdkphy_status(struct mii_softc *phy) 231{ 232 struct mii_data *mii = phy->mii_pdata; 233 int bmsr, bmcr, anlpar, diag; 234 235 mii->mii_media_status = IFM_AVALID; 236 mii->mii_media_active = IFM_ETHER; 237 238 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 239 if (bmsr & BMSR_LINK) 240 mii->mii_media_status |= IFM_ACTIVE; 241 242 bmcr = PHY_READ(phy, MII_BMCR); 243 if (bmcr & BMCR_ISO) { 244 mii->mii_media_active |= IFM_NONE; 245 mii->mii_media_status = 0; 246 return; 247 } 248 249 if (bmcr & BMCR_LOOP) 250 mii->mii_media_active |= IFM_LOOP; 251 252 if (bmcr & BMCR_AUTOEN) { 253 /* 254 * NWay autonegotiation takes the highest-order common 255 * bit of the ANAR and ANLPAR (i.e. best media advertised 256 * both by us and our link partner). 257 */ 258 if ((bmsr & BMSR_ACOMP) == 0) { 259 /* Erg, still trying, I guess... */ 260 mii->mii_media_active |= IFM_NONE; 261 return; 262 } 263 264 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR); 265 /* 266 * ANLPAR doesn't get set on my card, but we check it anyway, 267 * since it is mentioned in the 78Q2120 specs. 268 */ 269 if (anlpar & ANLPAR_T4) 270 mii->mii_media_active |= IFM_100_T4; 271 else if (anlpar & ANLPAR_TX_FD) 272 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 273 else if (anlpar & ANLPAR_TX) 274 mii->mii_media_active |= IFM_100_TX; 275 else if (anlpar & ANLPAR_10_FD) 276 mii->mii_media_active |= IFM_10_T|IFM_FDX; 277 else if (anlpar & ANLPAR_10) 278 mii->mii_media_active |= IFM_10_T; 279 else { 280 /* 281 * ANLPAR isn't set, which leaves two possibilities: 282 * 1) Auto negotiation failed 283 * 2) Auto negotiation completed, but the card forgot 284 * to set ANLPAR. 285 * So we check the MII_DIAG(18) register... 286 */ 287 diag = PHY_READ(phy, MII_DIAG); 288 if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */ 289 mii->mii_media_active |= IFM_10_T; 290 else { 291 if (diag & DIAG_DUPLEX) 292 mii->mii_media_active |= IFM_FDX; 293 if (diag & DIAG_RATE_100) 294 mii->mii_media_active |= IFM_100_TX; 295 else 296 mii->mii_media_active |= IFM_10_T; 297 } 298 } 299 } else { 300 mii->mii_media_active = mii_media_from_bmcr(bmcr); 301 } 302} 303