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 1.6 2005/02/21 18:40:36 joerg Exp $ 34 */ 35 36 /* 37 * driver for AMD AM79c873 PHYs 38 * This driver also works for the Davicom DM9101 PHY, which appears to 39 * be an AM79c873 workalike. 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/socket.h> 46 #include <sys/bus.h> 47 48 #include <net/if.h> 49 #include <net/if_media.h> 50 51 #include "mii.h" 52 #include "miivar.h" 53 #include "miidevs.h" 54 55 #include "amphyreg.h" 56 57 #include "miibus_if.h" 58 59 static int amphy_probe (device_t); 60 static int amphy_attach (device_t); 61 static int amphy_detach (device_t); 62 63 static device_method_t amphy_methods[] = { 64 /* device interface */ 65 DEVMETHOD(device_probe, amphy_probe), 66 DEVMETHOD(device_attach, amphy_attach), 67 DEVMETHOD(device_detach, amphy_detach), 68 DEVMETHOD(device_shutdown, bus_generic_shutdown), 69 { 0, 0 } 70 }; 71 72 static devclass_t amphy_devclass; 73 74 static driver_t amphy_driver = { 75 "amphy", 76 amphy_methods, 77 sizeof(struct mii_softc) 78 }; 79 80 DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0); 81 82 int amphy_service (struct mii_softc *, struct mii_data *, int); 83 void amphy_status (struct mii_softc *); 84 85 static int amphy_probe(dev) 86 device_t dev; 87 { 88 struct mii_attach_args *ma; 89 90 ma = device_get_ivars(dev); 91 92 if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxAMD || 93 MII_MODEL(ma->mii_id2) != MII_MODEL_xxAMD_79C873) && 94 (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxDAVICOM || 95 MII_MODEL(ma->mii_id2) != MII_MODEL_xxDAVICOM_DM9101)) 96 return(ENXIO); 97 98 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxAMD) 99 device_set_desc(dev, MII_STR_xxAMD_79C873); 100 else if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxDAVICOM) 101 device_set_desc(dev, MII_STR_xxDAVICOM_DM9101); 102 103 return(0); 104 } 105 106 static int amphy_attach(dev) 107 device_t dev; 108 { 109 struct mii_softc *sc; 110 struct mii_attach_args *ma; 111 struct mii_data *mii; 112 113 sc = device_get_softc(dev); 114 ma = device_get_ivars(dev); 115 mii_softc_init(sc); 116 sc->mii_dev = device_get_parent(dev); 117 mii = device_get_softc(sc->mii_dev); 118 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 119 120 sc->mii_inst = mii->mii_instance; 121 sc->mii_phy = ma->mii_phyno; 122 sc->mii_service = amphy_service; 123 sc->mii_pdata = mii; 124 125 sc->mii_flags |= MIIF_NOISOLATE; 126 mii->mii_instance++; 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 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 143 printf("no media present"); 144 else 145 mii_add_media(mii, sc->mii_capabilities, 146 sc->mii_inst); 147 printf("\n"); 148 #undef ADD 149 MIIBUS_MEDIAINIT(sc->mii_dev); 150 return(0); 151 } 152 153 static int amphy_detach(dev) 154 device_t dev; 155 { 156 struct mii_softc *sc; 157 struct mii_data *mii; 158 159 sc = device_get_softc(dev); 160 mii = device_get_softc(device_get_parent(dev)); 161 mii_phy_auto_stop(sc); 162 sc->mii_dev = NULL; 163 LIST_REMOVE(sc, mii_list); 164 165 return(0); 166 } 167 int 168 amphy_service(sc, mii, cmd) 169 struct mii_softc *sc; 170 struct mii_data *mii; 171 int cmd; 172 { 173 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 174 int reg; 175 176 switch (cmd) { 177 case MII_POLLSTAT: 178 /* 179 * If we're not polling our PHY instance, just return. 180 */ 181 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 182 return (0); 183 break; 184 185 case MII_MEDIACHG: 186 /* 187 * If the media indicates a different PHY instance, 188 * isolate ourselves. 189 */ 190 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 191 reg = PHY_READ(sc, MII_BMCR); 192 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 193 return (0); 194 } 195 196 /* 197 * If the interface is not up, don't do anything. 198 */ 199 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 200 break; 201 202 switch (IFM_SUBTYPE(ife->ifm_media)) { 203 case IFM_AUTO: 204 /* 205 * If we're already in auto mode, just return. 206 */ 207 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 208 return (0); 209 (void) mii_phy_auto(sc, 1); 210 break; 211 case IFM_100_T4: 212 /* 213 * XXX Not supported as a manual setting right now. 214 */ 215 return (EINVAL); 216 default: 217 /* 218 * BMCR data is stored in the ifmedia entry. 219 */ 220 PHY_WRITE(sc, MII_ANAR, 221 mii_anar(ife->ifm_media)); 222 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 223 } 224 break; 225 226 case MII_TICK: 227 /* 228 * If we're not currently selected, just return. 229 */ 230 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 231 return (0); 232 233 /* 234 * Only used for autonegotiation. 235 */ 236 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 237 return (0); 238 239 /* 240 * Is the interface even up? 241 */ 242 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 243 return (0); 244 245 /* 246 * Only retry autonegotiation every 5 seconds. 247 */ 248 if (++sc->mii_ticks != 5) 249 return (0); 250 251 sc->mii_ticks = 0; 252 253 /* 254 * Check to see if we have link. If we do, we don't 255 * need to restart the autonegotiation process. Read 256 * the BMSR twice in case it's latched. 257 */ 258 reg = PHY_READ(sc, MII_BMSR) | 259 PHY_READ(sc, MII_BMSR); 260 if (reg & BMSR_LINK) 261 break; 262 263 mii_phy_reset(sc); 264 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 265 return(0); 266 break; 267 } 268 269 /* Update the media status. */ 270 amphy_status(sc); 271 272 /* Callback if something changed. */ 273 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 274 MIIBUS_STATCHG(sc->mii_dev); 275 sc->mii_active = mii->mii_media_active; 276 } 277 return (0); 278 } 279 280 void 281 amphy_status(sc) 282 struct mii_softc *sc; 283 { 284 struct mii_data *mii = sc->mii_pdata; 285 int bmsr, bmcr, par, anlpar; 286 287 mii->mii_media_status = IFM_AVALID; 288 mii->mii_media_active = IFM_ETHER; 289 290 bmsr = PHY_READ(sc, MII_BMSR) | 291 PHY_READ(sc, MII_BMSR); 292 if (bmsr & BMSR_LINK) 293 mii->mii_media_status |= IFM_ACTIVE; 294 295 bmcr = PHY_READ(sc, MII_BMCR); 296 if (bmcr & BMCR_ISO) { 297 mii->mii_media_active |= IFM_NONE; 298 mii->mii_media_status = 0; 299 return; 300 } 301 302 if (bmcr & BMCR_LOOP) 303 mii->mii_media_active |= IFM_LOOP; 304 305 if (bmcr & BMCR_AUTOEN) { 306 /* 307 * The PAR status bits are only valid of autonegotiation 308 * has completed (or it's disabled). 309 */ 310 if ((bmsr & BMSR_ACOMP) == 0) { 311 /* Erg, still trying, I guess... */ 312 mii->mii_media_active |= IFM_NONE; 313 return; 314 } 315 316 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 317 anlpar = PHY_READ(sc, MII_ANAR) & 318 PHY_READ(sc, MII_ANLPAR); 319 if (anlpar & ANLPAR_T4) 320 mii->mii_media_active |= IFM_100_T4; 321 else if (anlpar & ANLPAR_TX_FD) 322 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 323 else if (anlpar & ANLPAR_TX) 324 mii->mii_media_active |= IFM_100_TX; 325 else if (anlpar & ANLPAR_10_FD) 326 mii->mii_media_active |= IFM_10_T|IFM_FDX; 327 else if (anlpar & ANLPAR_10) 328 mii->mii_media_active |= IFM_10_T; 329 else 330 mii->mii_media_active |= IFM_NONE; 331 return; 332 } 333 334 /* 335 * Link partner is not capable of autonegotiation. 336 */ 337 par = PHY_READ(sc, MII_AMPHY_DSCSR); 338 if (par & DSCSR_100FDX) 339 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 340 else if (par & DSCSR_100HDX) 341 mii->mii_media_active |= IFM_100_TX; 342 else if (par & DSCSR_10FDX) 343 mii->mii_media_active |= IFM_10_T|IFM_HDX; 344 else if (par & DSCSR_10HDX) 345 mii->mii_media_active |= IFM_10_T; 346 } else 347 mii->mii_media_active = mii_media_from_bmcr(bmcr); 348 } 349