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 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 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/module.h> 46 #include <sys/socket.h> 47 #include <sys/bus.h> 48 49 #include <net/if.h> 50 #include <net/if_media.h> 51 52 #include <dev/mii/mii.h> 53 #include <dev/mii/miivar.h> 54 #include "miidevs.h" 55 56 #include <dev/mii/amphyreg.h> 57 58 #include "miibus_if.h" 59 60 static int amphy_probe(device_t); 61 static int amphy_attach(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, mii_phy_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 static int amphy_service(struct mii_softc *, struct mii_data *, int); 83 static 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 sc->mii_dev = device_get_parent(dev); 116 mii = device_get_softc(sc->mii_dev); 117 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 118 119 sc->mii_inst = mii->mii_instance; 120 sc->mii_phy = ma->mii_phyno; 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 mii_add_media(sc); 142 printf("\n"); 143 #undef ADD 144 MIIBUS_MEDIAINIT(sc->mii_dev); 145 return(0); 146 } 147 148 static int 149 amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 150 { 151 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 152 int reg; 153 154 switch (cmd) { 155 case MII_POLLSTAT: 156 /* 157 * If we're not polling our PHY instance, just return. 158 */ 159 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 160 return (0); 161 break; 162 163 case MII_MEDIACHG: 164 /* 165 * If the media indicates a different PHY instance, 166 * isolate ourselves. 167 */ 168 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 169 reg = PHY_READ(sc, MII_BMCR); 170 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 171 return (0); 172 } 173 174 /* 175 * If the interface is not up, don't do anything. 176 */ 177 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 178 break; 179 180 switch (IFM_SUBTYPE(ife->ifm_media)) { 181 case IFM_AUTO: 182 /* 183 * If we're already in auto mode, just return. 184 */ 185 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 186 return (0); 187 (void) mii_phy_auto(sc); 188 break; 189 case IFM_100_T4: 190 /* 191 * XXX Not supported as a manual setting right now. 192 */ 193 return (EINVAL); 194 default: 195 /* 196 * BMCR data is stored in the ifmedia entry. 197 */ 198 PHY_WRITE(sc, MII_ANAR, 199 mii_anar(ife->ifm_media)); 200 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 201 } 202 break; 203 204 case MII_TICK: 205 /* 206 * If we're not currently selected, just return. 207 */ 208 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 209 return (0); 210 if (mii_phy_tick(sc) == EJUSTRETURN) 211 return (0); 212 break; 213 } 214 215 /* Update the media status. */ 216 amphy_status(sc); 217 218 /* Callback if something changed. */ 219 mii_phy_update(sc, cmd); 220 return (0); 221 } 222 223 static void 224 amphy_status(struct mii_softc *sc) 225 { 226 struct mii_data *mii = sc->mii_pdata; 227 int bmsr, bmcr, par, anlpar; 228 229 mii->mii_media_status = IFM_AVALID; 230 mii->mii_media_active = IFM_ETHER; 231 232 bmsr = PHY_READ(sc, MII_BMSR) | 233 PHY_READ(sc, MII_BMSR); 234 if (bmsr & BMSR_LINK) 235 mii->mii_media_status |= IFM_ACTIVE; 236 237 bmcr = PHY_READ(sc, MII_BMCR); 238 if (bmcr & BMCR_ISO) { 239 mii->mii_media_active |= IFM_NONE; 240 mii->mii_media_status = 0; 241 return; 242 } 243 244 if (bmcr & BMCR_LOOP) 245 mii->mii_media_active |= IFM_LOOP; 246 247 if (bmcr & BMCR_AUTOEN) { 248 /* 249 * The PAR status bits are only valid of autonegotiation 250 * has completed (or it's disabled). 251 */ 252 if ((bmsr & BMSR_ACOMP) == 0) { 253 /* Erg, still trying, I guess... */ 254 mii->mii_media_active |= IFM_NONE; 255 return; 256 } 257 258 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 259 anlpar = PHY_READ(sc, MII_ANAR) & 260 PHY_READ(sc, MII_ANLPAR); 261 if (anlpar & ANLPAR_T4) 262 mii->mii_media_active |= IFM_100_T4; 263 else if (anlpar & ANLPAR_TX_FD) 264 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 265 else if (anlpar & ANLPAR_TX) 266 mii->mii_media_active |= IFM_100_TX; 267 else if (anlpar & ANLPAR_10_FD) 268 mii->mii_media_active |= IFM_10_T|IFM_FDX; 269 else if (anlpar & ANLPAR_10) 270 mii->mii_media_active |= IFM_10_T; 271 else 272 mii->mii_media_active |= IFM_NONE; 273 return; 274 } 275 276 /* 277 * Link partner is not capable of autonegotiation. 278 */ 279 par = PHY_READ(sc, MII_AMPHY_DSCSR); 280 if (par & DSCSR_100FDX) 281 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 282 else if (par & DSCSR_100HDX) 283 mii->mii_media_active |= IFM_100_TX; 284 else if (par & DSCSR_10FDX) 285 mii->mii_media_active |= IFM_10_T|IFM_HDX; 286 else if (par & DSCSR_10HDX) 287 mii->mii_media_active |= IFM_10_T; 288 } else 289 mii->mii_media_active = mii_media_from_bmcr(bmcr); 290 } 291