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 1.9 2005/12/11 01:54:08 swildner 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 86 amphy_probe(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 107 amphy_attach(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, ma); 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_service = amphy_service; 122 sc->mii_pdata = mii; 123 124 sc->mii_flags |= MIIF_NOISOLATE; 125 mii->mii_instance++; 126 127 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 128 129 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 130 BMCR_ISO); 131 #if 0 132 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 133 BMCR_LOOP|BMCR_S100); 134 #endif 135 136 mii_phy_reset(sc); 137 138 sc->mii_capabilities = 139 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 140 device_printf(dev, " "); 141 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 142 printf("no media present"); 143 else 144 mii_add_media(sc, sc->mii_capabilities); 145 printf("\n"); 146 #undef ADD 147 MIIBUS_MEDIAINIT(sc->mii_dev); 148 return(0); 149 } 150 151 static int 152 amphy_detach(device_t dev) 153 { 154 struct mii_softc *sc; 155 struct mii_data *mii; 156 157 sc = device_get_softc(dev); 158 mii = device_get_softc(device_get_parent(dev)); 159 mii_phy_auto_stop(sc); 160 sc->mii_dev = NULL; 161 LIST_REMOVE(sc, mii_list); 162 163 return(0); 164 } 165 166 int 167 amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 168 { 169 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 170 int reg; 171 172 switch (cmd) { 173 case MII_POLLSTAT: 174 /* 175 * If we're not polling our PHY instance, just return. 176 */ 177 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 178 return (0); 179 break; 180 181 case MII_MEDIACHG: 182 /* 183 * If the media indicates a different PHY instance, 184 * isolate ourselves. 185 */ 186 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 187 reg = PHY_READ(sc, MII_BMCR); 188 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 189 return (0); 190 } 191 192 /* 193 * If the interface is not up, don't do anything. 194 */ 195 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 196 break; 197 198 switch (IFM_SUBTYPE(ife->ifm_media)) { 199 case IFM_AUTO: 200 /* 201 * If we're already in auto mode, just return. 202 */ 203 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 204 return (0); 205 (void) mii_phy_auto(sc, 1); 206 break; 207 case IFM_100_T4: 208 /* 209 * XXX Not supported as a manual setting right now. 210 */ 211 return (EINVAL); 212 default: 213 /* 214 * BMCR data is stored in the ifmedia entry. 215 */ 216 PHY_WRITE(sc, MII_ANAR, 217 mii_anar(ife->ifm_media)); 218 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 219 } 220 break; 221 222 case MII_TICK: 223 /* 224 * If we're not currently selected, just return. 225 */ 226 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 227 return (0); 228 229 /* 230 * Only used for autonegotiation. 231 */ 232 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 233 return (0); 234 235 /* 236 * Is the interface even up? 237 */ 238 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 239 return (0); 240 241 /* 242 * Only retry autonegotiation every 5 seconds. 243 */ 244 if (++sc->mii_ticks != 5) 245 return (0); 246 247 sc->mii_ticks = 0; 248 249 /* 250 * Check to see if we have link. If we do, we don't 251 * need to restart the autonegotiation process. Read 252 * the BMSR twice in case it's latched. 253 */ 254 reg = PHY_READ(sc, MII_BMSR) | 255 PHY_READ(sc, MII_BMSR); 256 if (reg & BMSR_LINK) 257 break; 258 259 mii_phy_reset(sc); 260 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 261 return(0); 262 break; 263 } 264 265 /* Update the media status. */ 266 amphy_status(sc); 267 268 /* Callback if something changed. */ 269 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 270 MIIBUS_STATCHG(sc->mii_dev); 271 sc->mii_active = mii->mii_media_active; 272 } 273 return (0); 274 } 275 276 void 277 amphy_status(struct mii_softc *sc) 278 { 279 struct mii_data *mii = sc->mii_pdata; 280 int bmsr, bmcr, par, anlpar; 281 282 mii->mii_media_status = IFM_AVALID; 283 mii->mii_media_active = IFM_ETHER; 284 285 bmsr = PHY_READ(sc, MII_BMSR) | 286 PHY_READ(sc, MII_BMSR); 287 if (bmsr & BMSR_LINK) 288 mii->mii_media_status |= IFM_ACTIVE; 289 290 bmcr = PHY_READ(sc, MII_BMCR); 291 if (bmcr & BMCR_ISO) { 292 mii->mii_media_active |= IFM_NONE; 293 mii->mii_media_status = 0; 294 return; 295 } 296 297 if (bmcr & BMCR_LOOP) 298 mii->mii_media_active |= IFM_LOOP; 299 300 if (bmcr & BMCR_AUTOEN) { 301 /* 302 * The PAR status bits are only valid of autonegotiation 303 * has completed (or it's disabled). 304 */ 305 if ((bmsr & BMSR_ACOMP) == 0) { 306 /* Erg, still trying, I guess... */ 307 mii->mii_media_active |= IFM_NONE; 308 return; 309 } 310 311 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 312 anlpar = PHY_READ(sc, MII_ANAR) & 313 PHY_READ(sc, MII_ANLPAR); 314 if (anlpar & ANLPAR_T4) 315 mii->mii_media_active |= IFM_100_T4; 316 else if (anlpar & ANLPAR_TX_FD) 317 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 318 else if (anlpar & ANLPAR_TX) 319 mii->mii_media_active |= IFM_100_TX; 320 else if (anlpar & ANLPAR_10_FD) 321 mii->mii_media_active |= IFM_10_T|IFM_FDX; 322 else if (anlpar & ANLPAR_10) 323 mii->mii_media_active |= IFM_10_T; 324 else 325 mii->mii_media_active |= IFM_NONE; 326 return; 327 } 328 329 /* 330 * Link partner is not capable of autonegotiation. 331 */ 332 par = PHY_READ(sc, MII_AMPHY_DSCSR); 333 if (par & DSCSR_100FDX) 334 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 335 else if (par & DSCSR_100HDX) 336 mii->mii_media_active |= IFM_100_TX; 337 else if (par & DSCSR_10FDX) 338 mii->mii_media_active |= IFM_10_T|IFM_HDX; 339 else if (par & DSCSR_10HDX) 340 mii->mii_media_active |= IFM_10_T; 341 } else 342 mii->mii_media_active = mii_media_from_bmcr(bmcr); 343 } 344