1 /* 2 * Copyright (c) 1997, 1998, 1999 3 * Bill Paul <wpaul@ee.columbia.edu>. 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 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Bill Paul. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 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 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 * $FreeBSD: src/sys/dev/mii/amphy.c,v 1.2.2.2 2002/11/08 21:53:49 semenu Exp $ 33 * $DragonFly: src/sys/dev/netif/mii_layer/amphy.c,v 1.5 2004/09/18 19:32:59 dillon Exp $ 34 * 35 * $FreeBSD: src/sys/dev/mii/amphy.c,v 1.2.2.2 2002/11/08 21:53:49 semenu Exp $ 36 */ 37 38 /* 39 * driver for AMD AM79c873 PHYs 40 * This driver also works for the Davicom DM9101 PHY, which appears to 41 * be an AM79c873 workalike. 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/socket.h> 48 #include <sys/bus.h> 49 50 #include <net/if.h> 51 #include <net/if_media.h> 52 53 #include "mii.h" 54 #include "miivar.h" 55 #include "miidevs.h" 56 57 #include "amphyreg.h" 58 59 #include "miibus_if.h" 60 61 static int amphy_probe (device_t); 62 static int amphy_attach (device_t); 63 static int amphy_detach (device_t); 64 65 static device_method_t amphy_methods[] = { 66 /* device interface */ 67 DEVMETHOD(device_probe, amphy_probe), 68 DEVMETHOD(device_attach, amphy_attach), 69 DEVMETHOD(device_detach, amphy_detach), 70 DEVMETHOD(device_shutdown, bus_generic_shutdown), 71 { 0, 0 } 72 }; 73 74 static devclass_t amphy_devclass; 75 76 static driver_t amphy_driver = { 77 "amphy", 78 amphy_methods, 79 sizeof(struct mii_softc) 80 }; 81 82 DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0); 83 84 int amphy_service (struct mii_softc *, struct mii_data *, int); 85 void amphy_status (struct mii_softc *); 86 87 static int amphy_probe(dev) 88 device_t dev; 89 { 90 struct mii_attach_args *ma; 91 92 ma = device_get_ivars(dev); 93 94 if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxAMD || 95 MII_MODEL(ma->mii_id2) != MII_MODEL_xxAMD_79C873) && 96 (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxDAVICOM || 97 MII_MODEL(ma->mii_id2) != MII_MODEL_xxDAVICOM_DM9101)) 98 return(ENXIO); 99 100 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxAMD) 101 device_set_desc(dev, MII_STR_xxAMD_79C873); 102 else if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxDAVICOM) 103 device_set_desc(dev, MII_STR_xxDAVICOM_DM9101); 104 105 return(0); 106 } 107 108 static int amphy_attach(dev) 109 device_t dev; 110 { 111 struct mii_softc *sc; 112 struct mii_attach_args *ma; 113 struct mii_data *mii; 114 115 sc = device_get_softc(dev); 116 ma = device_get_ivars(dev); 117 mii_softc_init(sc); 118 sc->mii_dev = device_get_parent(dev); 119 mii = device_get_softc(sc->mii_dev); 120 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 121 122 sc->mii_inst = mii->mii_instance; 123 sc->mii_phy = ma->mii_phyno; 124 sc->mii_service = amphy_service; 125 sc->mii_pdata = mii; 126 127 sc->mii_flags |= MIIF_NOISOLATE; 128 mii->mii_instance++; 129 130 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 131 132 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 133 BMCR_ISO); 134 #if 0 135 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 136 BMCR_LOOP|BMCR_S100); 137 #endif 138 139 mii_phy_reset(sc); 140 141 sc->mii_capabilities = 142 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 143 device_printf(dev, " "); 144 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 145 printf("no media present"); 146 else 147 mii_add_media(mii, sc->mii_capabilities, 148 sc->mii_inst); 149 printf("\n"); 150 #undef ADD 151 MIIBUS_MEDIAINIT(sc->mii_dev); 152 return(0); 153 } 154 155 static int amphy_detach(dev) 156 device_t dev; 157 { 158 struct mii_softc *sc; 159 struct mii_data *mii; 160 161 sc = device_get_softc(dev); 162 mii = device_get_softc(device_get_parent(dev)); 163 mii_phy_auto_stop(sc); 164 sc->mii_dev = NULL; 165 LIST_REMOVE(sc, mii_list); 166 167 return(0); 168 } 169 int 170 amphy_service(sc, mii, cmd) 171 struct mii_softc *sc; 172 struct mii_data *mii; 173 int cmd; 174 { 175 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 176 int reg; 177 178 switch (cmd) { 179 case MII_POLLSTAT: 180 /* 181 * If we're not polling our PHY instance, just return. 182 */ 183 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 184 return (0); 185 break; 186 187 case MII_MEDIACHG: 188 /* 189 * If the media indicates a different PHY instance, 190 * isolate ourselves. 191 */ 192 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 193 reg = PHY_READ(sc, MII_BMCR); 194 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 195 return (0); 196 } 197 198 /* 199 * If the interface is not up, don't do anything. 200 */ 201 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 202 break; 203 204 switch (IFM_SUBTYPE(ife->ifm_media)) { 205 case IFM_AUTO: 206 /* 207 * If we're already in auto mode, just return. 208 */ 209 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 210 return (0); 211 (void) mii_phy_auto(sc, 1); 212 break; 213 case IFM_100_T4: 214 /* 215 * XXX Not supported as a manual setting right now. 216 */ 217 return (EINVAL); 218 default: 219 /* 220 * BMCR data is stored in the ifmedia entry. 221 */ 222 PHY_WRITE(sc, MII_ANAR, 223 mii_anar(ife->ifm_media)); 224 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 225 } 226 break; 227 228 case MII_TICK: 229 /* 230 * If we're not currently selected, just return. 231 */ 232 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 233 return (0); 234 235 /* 236 * Only used for autonegotiation. 237 */ 238 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 239 return (0); 240 241 /* 242 * Is the interface even up? 243 */ 244 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 245 return (0); 246 247 /* 248 * Only retry autonegotiation every 5 seconds. 249 */ 250 if (++sc->mii_ticks != 5) 251 return (0); 252 253 sc->mii_ticks = 0; 254 255 /* 256 * Check to see if we have link. If we do, we don't 257 * need to restart the autonegotiation process. Read 258 * the BMSR twice in case it's latched. 259 */ 260 reg = PHY_READ(sc, MII_BMSR) | 261 PHY_READ(sc, MII_BMSR); 262 if (reg & BMSR_LINK) 263 break; 264 265 mii_phy_reset(sc); 266 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 267 return(0); 268 break; 269 } 270 271 /* Update the media status. */ 272 amphy_status(sc); 273 274 /* Callback if something changed. */ 275 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 276 MIIBUS_STATCHG(sc->mii_dev); 277 sc->mii_active = mii->mii_media_active; 278 } 279 return (0); 280 } 281 282 void 283 amphy_status(sc) 284 struct mii_softc *sc; 285 { 286 struct mii_data *mii = sc->mii_pdata; 287 int bmsr, bmcr, par, anlpar; 288 289 mii->mii_media_status = IFM_AVALID; 290 mii->mii_media_active = IFM_ETHER; 291 292 bmsr = PHY_READ(sc, MII_BMSR) | 293 PHY_READ(sc, MII_BMSR); 294 if (bmsr & BMSR_LINK) 295 mii->mii_media_status |= IFM_ACTIVE; 296 297 bmcr = PHY_READ(sc, MII_BMCR); 298 if (bmcr & BMCR_ISO) { 299 mii->mii_media_active |= IFM_NONE; 300 mii->mii_media_status = 0; 301 return; 302 } 303 304 if (bmcr & BMCR_LOOP) 305 mii->mii_media_active |= IFM_LOOP; 306 307 if (bmcr & BMCR_AUTOEN) { 308 /* 309 * The PAR status bits are only valid of autonegotiation 310 * has completed (or it's disabled). 311 */ 312 if ((bmsr & BMSR_ACOMP) == 0) { 313 /* Erg, still trying, I guess... */ 314 mii->mii_media_active |= IFM_NONE; 315 return; 316 } 317 318 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 319 anlpar = PHY_READ(sc, MII_ANAR) & 320 PHY_READ(sc, MII_ANLPAR); 321 if (anlpar & ANLPAR_T4) 322 mii->mii_media_active |= IFM_100_T4; 323 else if (anlpar & ANLPAR_TX_FD) 324 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 325 else if (anlpar & ANLPAR_TX) 326 mii->mii_media_active |= IFM_100_TX; 327 else if (anlpar & ANLPAR_10_FD) 328 mii->mii_media_active |= IFM_10_T|IFM_FDX; 329 else if (anlpar & ANLPAR_10) 330 mii->mii_media_active |= IFM_10_T; 331 else 332 mii->mii_media_active |= IFM_NONE; 333 return; 334 } 335 336 /* 337 * Link partner is not capable of autonegotiation. 338 */ 339 par = PHY_READ(sc, MII_AMPHY_DSCSR); 340 if (par & DSCSR_100FDX) 341 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 342 else if (par & DSCSR_100HDX) 343 mii->mii_media_active |= IFM_100_TX; 344 else if (par & DSCSR_10FDX) 345 mii->mii_media_active |= IFM_10_T|IFM_HDX; 346 else if (par & DSCSR_10HDX) 347 mii->mii_media_active |= IFM_10_T; 348 } else 349 mii->mii_media_active = mii_media_from_bmcr(bmcr); 350 } 351