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 * $FreeBSD$ 33 */ 34 35 /* 36 * driver for AMD AM79c873 PHYs 37 * This driver also works for the Davicom DM9101 PHY, which appears to 38 * be an AM79c873 workalike. 39 */ 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/malloc.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 <dev/mii/mii.h> 52 #include <dev/mii/miivar.h> 53 #include <dev/mii/miidevs.h> 54 55 #include <dev/mii/amphyreg.h> 56 57 #include "miibus_if.h" 58 59 #if !defined(lint) 60 static const char rcsid[] = 61 "$FreeBSD$"; 62 #endif 63 64 static int amphy_probe __P((device_t)); 65 static int amphy_attach __P((device_t)); 66 static int amphy_detach __P((device_t)); 67 68 static device_method_t amphy_methods[] = { 69 /* device interface */ 70 DEVMETHOD(device_probe, amphy_probe), 71 DEVMETHOD(device_attach, amphy_attach), 72 DEVMETHOD(device_detach, amphy_detach), 73 DEVMETHOD(device_shutdown, bus_generic_shutdown), 74 { 0, 0 } 75 }; 76 77 static devclass_t amphy_devclass; 78 79 static driver_t amphy_driver = { 80 "amphy", 81 amphy_methods, 82 sizeof(struct mii_softc) 83 }; 84 85 DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0); 86 87 int amphy_service __P((struct mii_softc *, struct mii_data *, int)); 88 void amphy_status __P((struct mii_softc *)); 89 90 static int amphy_probe(dev) 91 device_t dev; 92 { 93 struct mii_attach_args *ma; 94 95 ma = device_get_ivars(dev); 96 97 if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxAMD || 98 MII_MODEL(ma->mii_id2) != MII_MODEL_xxAMD_79C873) && 99 (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxDAVICOM || 100 MII_MODEL(ma->mii_id2) != MII_MODEL_xxDAVICOM_DM9101)) 101 return(ENXIO); 102 103 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxAMD) 104 device_set_desc(dev, MII_STR_xxAMD_79C873); 105 else if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxDAVICOM) 106 device_set_desc(dev, MII_STR_xxDAVICOM_DM9101); 107 108 return(0); 109 } 110 111 static int amphy_attach(dev) 112 device_t dev; 113 { 114 struct mii_softc *sc; 115 struct mii_attach_args *ma; 116 struct mii_data *mii; 117 118 sc = device_get_softc(dev); 119 ma = device_get_ivars(dev); 120 sc->mii_dev = device_get_parent(dev); 121 mii = device_get_softc(sc->mii_dev); 122 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 123 124 sc->mii_inst = mii->mii_instance; 125 sc->mii_phy = ma->mii_phyno; 126 sc->mii_service = amphy_service; 127 sc->mii_pdata = mii; 128 129 sc->mii_flags |= MIIF_NOISOLATE; 130 mii->mii_instance++; 131 132 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 133 134 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 135 BMCR_ISO); 136 #if 0 137 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 138 BMCR_LOOP|BMCR_S100); 139 #endif 140 141 mii_phy_reset(sc); 142 143 sc->mii_capabilities = 144 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 145 device_printf(dev, " "); 146 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 147 printf("no media present"); 148 else 149 mii_add_media(mii, sc->mii_capabilities, 150 sc->mii_inst); 151 printf("\n"); 152 #undef ADD 153 MIIBUS_MEDIAINIT(sc->mii_dev); 154 return(0); 155 } 156 157 static int amphy_detach(dev) 158 device_t dev; 159 { 160 struct mii_softc *sc; 161 struct mii_data *mii; 162 163 sc = device_get_softc(dev); 164 mii = device_get_softc(device_get_parent(dev)); 165 sc->mii_dev = NULL; 166 LIST_REMOVE(sc, mii_list); 167 168 return(0); 169 } 170 int 171 amphy_service(sc, mii, cmd) 172 struct mii_softc *sc; 173 struct mii_data *mii; 174 int cmd; 175 { 176 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 177 int reg; 178 179 switch (cmd) { 180 case MII_POLLSTAT: 181 /* 182 * If we're not polling our PHY instance, just return. 183 */ 184 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 185 return (0); 186 break; 187 188 case MII_MEDIACHG: 189 /* 190 * If the media indicates a different PHY instance, 191 * isolate ourselves. 192 */ 193 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 194 reg = PHY_READ(sc, MII_BMCR); 195 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 196 return (0); 197 } 198 199 /* 200 * If the interface is not up, don't do anything. 201 */ 202 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 203 break; 204 205 switch (IFM_SUBTYPE(ife->ifm_media)) { 206 case IFM_AUTO: 207 /* 208 * If we're already in auto mode, just return. 209 */ 210 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 211 return (0); 212 (void) mii_phy_auto(sc, 1); 213 break; 214 case IFM_100_T4: 215 /* 216 * XXX Not supported as a manual setting right now. 217 */ 218 return (EINVAL); 219 default: 220 /* 221 * BMCR data is stored in the ifmedia entry. 222 */ 223 PHY_WRITE(sc, MII_ANAR, 224 mii_anar(ife->ifm_media)); 225 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 226 } 227 break; 228 229 case MII_TICK: 230 /* 231 * If we're not currently selected, just return. 232 */ 233 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 234 return (0); 235 236 /* 237 * Only used for autonegotiation. 238 */ 239 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 240 return (0); 241 242 /* 243 * Is the interface even up? 244 */ 245 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 246 return (0); 247 248 /* 249 * Only retry autonegotiation every 5 seconds. 250 */ 251 if (++sc->mii_ticks != 5) 252 return (0); 253 254 sc->mii_ticks = 0; 255 256 /* 257 * Check to see if we have link. If we do, we don't 258 * need to restart the autonegotiation process. Read 259 * the BMSR twice in case it's latched. 260 */ 261 reg = PHY_READ(sc, MII_BMSR) | 262 PHY_READ(sc, MII_BMSR); 263 if (reg & BMSR_LINK) 264 break; 265 266 mii_phy_reset(sc); 267 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 268 return(0); 269 break; 270 } 271 272 /* Update the media status. */ 273 amphy_status(sc); 274 275 /* Callback if something changed. */ 276 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 277 MIIBUS_STATCHG(sc->mii_dev); 278 sc->mii_active = mii->mii_media_active; 279 } 280 return (0); 281 } 282 283 void 284 amphy_status(sc) 285 struct mii_softc *sc; 286 { 287 struct mii_data *mii = sc->mii_pdata; 288 int bmsr, bmcr, par, anlpar; 289 290 mii->mii_media_status = IFM_AVALID; 291 mii->mii_media_active = IFM_ETHER; 292 293 bmsr = PHY_READ(sc, MII_BMSR) | 294 PHY_READ(sc, MII_BMSR); 295 if (bmsr & BMSR_LINK) 296 mii->mii_media_status |= IFM_ACTIVE; 297 298 bmcr = PHY_READ(sc, MII_BMCR); 299 if (bmcr & BMCR_ISO) { 300 mii->mii_media_active |= IFM_NONE; 301 mii->mii_media_status = 0; 302 return; 303 } 304 305 if (bmcr & BMCR_LOOP) 306 mii->mii_media_active |= IFM_LOOP; 307 308 if (bmcr & BMCR_AUTOEN) { 309 /* 310 * The PAR status bits are only valid of autonegotiation 311 * has completed (or it's disabled). 312 */ 313 if ((bmsr & BMSR_ACOMP) == 0) { 314 /* Erg, still trying, I guess... */ 315 mii->mii_media_active |= IFM_NONE; 316 return; 317 } 318 319 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 320 anlpar = PHY_READ(sc, MII_ANAR) & 321 PHY_READ(sc, MII_ANLPAR); 322 if (anlpar & ANLPAR_T4) 323 mii->mii_media_active |= IFM_100_T4; 324 else if (anlpar & ANLPAR_TX_FD) 325 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 326 else if (anlpar & ANLPAR_TX) 327 mii->mii_media_active |= IFM_100_TX; 328 else if (anlpar & ANLPAR_10_FD) 329 mii->mii_media_active |= IFM_10_T|IFM_FDX; 330 else if (anlpar & ANLPAR_10) 331 mii->mii_media_active |= IFM_10_T; 332 else 333 mii->mii_media_active |= IFM_NONE; 334 return; 335 } 336 337 /* 338 * Link partner is not capable of autonegotiation. 339 */ 340 par = PHY_READ(sc, MII_AMPHY_DSCSR); 341 if (par & DSCSR_100FDX) 342 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 343 else if (par & DSCSR_100HDX) 344 mii->mii_media_active |= IFM_100_TX; 345 else if (par & DSCSR_10FDX) 346 mii->mii_media_active |= IFM_10_T|IFM_HDX; 347 else if (par & DSCSR_10HDX) 348 mii->mii_media_active |= IFM_10_T; 349 } else 350 mii->mii_media_active = mii_media_from_bmcr(bmcr); 351 } 352