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 1.4 2003/08/27 09:38:31 rob 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 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 sc->mii_inst = mii->mii_instance; 122 sc->mii_phy = ma->mii_phyno; 123 sc->mii_service = amphy_service; 124 sc->mii_pdata = mii; 125 126 sc->mii_flags |= MIIF_NOISOLATE; 127 mii->mii_instance++; 128 129 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 130 131 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 132 BMCR_ISO); 133 #if 0 134 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 135 BMCR_LOOP|BMCR_S100); 136 #endif 137 138 mii_phy_reset(sc); 139 140 sc->mii_capabilities = 141 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 142 device_printf(dev, " "); 143 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 144 printf("no media present"); 145 else 146 mii_add_media(mii, sc->mii_capabilities, 147 sc->mii_inst); 148 printf("\n"); 149 #undef ADD 150 MIIBUS_MEDIAINIT(sc->mii_dev); 151 return(0); 152 } 153 154 static int amphy_detach(dev) 155 device_t dev; 156 { 157 struct mii_softc *sc; 158 struct mii_data *mii; 159 160 sc = device_get_softc(dev); 161 mii = device_get_softc(device_get_parent(dev)); 162 mii_phy_auto_stop(sc); 163 sc->mii_dev = NULL; 164 LIST_REMOVE(sc, mii_list); 165 166 return(0); 167 } 168 int 169 amphy_service(sc, mii, cmd) 170 struct mii_softc *sc; 171 struct mii_data *mii; 172 int cmd; 173 { 174 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 175 int reg; 176 177 switch (cmd) { 178 case MII_POLLSTAT: 179 /* 180 * If we're not polling our PHY instance, just return. 181 */ 182 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 183 return (0); 184 break; 185 186 case MII_MEDIACHG: 187 /* 188 * If the media indicates a different PHY instance, 189 * isolate ourselves. 190 */ 191 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 192 reg = PHY_READ(sc, MII_BMCR); 193 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 194 return (0); 195 } 196 197 /* 198 * If the interface is not up, don't do anything. 199 */ 200 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 201 break; 202 203 switch (IFM_SUBTYPE(ife->ifm_media)) { 204 case IFM_AUTO: 205 /* 206 * If we're already in auto mode, just return. 207 */ 208 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 209 return (0); 210 (void) mii_phy_auto(sc, 1); 211 break; 212 case IFM_100_T4: 213 /* 214 * XXX Not supported as a manual setting right now. 215 */ 216 return (EINVAL); 217 default: 218 /* 219 * BMCR data is stored in the ifmedia entry. 220 */ 221 PHY_WRITE(sc, MII_ANAR, 222 mii_anar(ife->ifm_media)); 223 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 224 } 225 break; 226 227 case MII_TICK: 228 /* 229 * If we're not currently selected, just return. 230 */ 231 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 232 return (0); 233 234 /* 235 * Only used for autonegotiation. 236 */ 237 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 238 return (0); 239 240 /* 241 * Is the interface even up? 242 */ 243 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 244 return (0); 245 246 /* 247 * Only retry autonegotiation every 5 seconds. 248 */ 249 if (++sc->mii_ticks != 5) 250 return (0); 251 252 sc->mii_ticks = 0; 253 254 /* 255 * Check to see if we have link. If we do, we don't 256 * need to restart the autonegotiation process. Read 257 * the BMSR twice in case it's latched. 258 */ 259 reg = PHY_READ(sc, MII_BMSR) | 260 PHY_READ(sc, MII_BMSR); 261 if (reg & BMSR_LINK) 262 break; 263 264 mii_phy_reset(sc); 265 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 266 return(0); 267 break; 268 } 269 270 /* Update the media status. */ 271 amphy_status(sc); 272 273 /* Callback if something changed. */ 274 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 275 MIIBUS_STATCHG(sc->mii_dev); 276 sc->mii_active = mii->mii_media_active; 277 } 278 return (0); 279 } 280 281 void 282 amphy_status(sc) 283 struct mii_softc *sc; 284 { 285 struct mii_data *mii = sc->mii_pdata; 286 int bmsr, bmcr, par, anlpar; 287 288 mii->mii_media_status = IFM_AVALID; 289 mii->mii_media_active = IFM_ETHER; 290 291 bmsr = PHY_READ(sc, MII_BMSR) | 292 PHY_READ(sc, MII_BMSR); 293 if (bmsr & BMSR_LINK) 294 mii->mii_media_status |= IFM_ACTIVE; 295 296 bmcr = PHY_READ(sc, MII_BMCR); 297 if (bmcr & BMCR_ISO) { 298 mii->mii_media_active |= IFM_NONE; 299 mii->mii_media_status = 0; 300 return; 301 } 302 303 if (bmcr & BMCR_LOOP) 304 mii->mii_media_active |= IFM_LOOP; 305 306 if (bmcr & BMCR_AUTOEN) { 307 /* 308 * The PAR status bits are only valid of autonegotiation 309 * has completed (or it's disabled). 310 */ 311 if ((bmsr & BMSR_ACOMP) == 0) { 312 /* Erg, still trying, I guess... */ 313 mii->mii_media_active |= IFM_NONE; 314 return; 315 } 316 317 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 318 anlpar = PHY_READ(sc, MII_ANAR) & 319 PHY_READ(sc, MII_ANLPAR); 320 if (anlpar & ANLPAR_T4) 321 mii->mii_media_active |= IFM_100_T4; 322 else if (anlpar & ANLPAR_TX_FD) 323 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 324 else if (anlpar & ANLPAR_TX) 325 mii->mii_media_active |= IFM_100_TX; 326 else if (anlpar & ANLPAR_10_FD) 327 mii->mii_media_active |= IFM_10_T|IFM_FDX; 328 else if (anlpar & ANLPAR_10) 329 mii->mii_media_active |= IFM_10_T; 330 else 331 mii->mii_media_active |= IFM_NONE; 332 return; 333 } 334 335 /* 336 * Link partner is not capable of autonegotiation. 337 */ 338 par = PHY_READ(sc, MII_AMPHY_DSCSR); 339 if (par & DSCSR_100FDX) 340 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 341 else if (par & DSCSR_100HDX) 342 mii->mii_media_active |= IFM_100_TX; 343 else if (par & DSCSR_10FDX) 344 mii->mii_media_active |= IFM_10_T|IFM_HDX; 345 else if (par & DSCSR_10HDX) 346 mii->mii_media_active |= IFM_10_T; 347 } else 348 mii->mii_media_active = mii_media_from_bmcr(bmcr); 349 } 350