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/socket.h> 45 #include <sys/bus.h> 46 47 #include <net/if.h> 48 #include <net/if_media.h> 49 50 #include <dev/mii/mii.h> 51 #include <dev/mii/miivar.h> 52 #include <dev/mii/miidevs.h> 53 54 #include <dev/mii/amphyreg.h> 55 56 #include "miibus_if.h" 57 58 #if !defined(lint) 59 static const char rcsid[] = 60 "$FreeBSD$"; 61 #endif 62 63 static int amphy_probe (device_t); 64 static int amphy_attach (device_t); 65 66 static device_method_t amphy_methods[] = { 67 /* device interface */ 68 DEVMETHOD(device_probe, amphy_probe), 69 DEVMETHOD(device_attach, amphy_attach), 70 DEVMETHOD(device_detach, mii_phy_detach), 71 DEVMETHOD(device_shutdown, bus_generic_shutdown), 72 { 0, 0 } 73 }; 74 75 static devclass_t amphy_devclass; 76 77 static driver_t amphy_driver = { 78 "amphy", 79 amphy_methods, 80 sizeof(struct mii_softc) 81 }; 82 83 DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0); 84 85 static int amphy_service(struct mii_softc *, struct mii_data *, int); 86 static void amphy_status(struct mii_softc *); 87 88 static int amphy_probe(dev) 89 device_t dev; 90 { 91 struct mii_attach_args *ma; 92 93 ma = device_get_ivars(dev); 94 95 if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxAMD || 96 MII_MODEL(ma->mii_id2) != MII_MODEL_xxAMD_79C873) && 97 (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxDAVICOM || 98 MII_MODEL(ma->mii_id2) != MII_MODEL_xxDAVICOM_DM9101)) 99 return(ENXIO); 100 101 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxAMD) 102 device_set_desc(dev, MII_STR_xxAMD_79C873); 103 else if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxDAVICOM) 104 device_set_desc(dev, MII_STR_xxDAVICOM_DM9101); 105 106 return(0); 107 } 108 109 static int amphy_attach(dev) 110 device_t dev; 111 { 112 struct mii_softc *sc; 113 struct mii_attach_args *ma; 114 struct mii_data *mii; 115 116 sc = device_get_softc(dev); 117 ma = device_get_ivars(dev); 118 sc->mii_dev = device_get_parent(dev); 119 mii = device_get_softc(sc->mii_dev); 120 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 121 122 sc->mii_inst = mii->mii_instance; 123 sc->mii_phy = ma->mii_phyno; 124 sc->mii_service = amphy_service; 125 sc->mii_pdata = mii; 126 127 sc->mii_flags |= MIIF_NOISOLATE; 128 mii->mii_instance++; 129 130 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 131 132 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 133 BMCR_ISO); 134 #if 0 135 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 136 BMCR_LOOP|BMCR_S100); 137 #endif 138 139 mii_phy_reset(sc); 140 141 sc->mii_capabilities = 142 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 143 device_printf(dev, " "); 144 mii_add_media(sc); 145 printf("\n"); 146 #undef ADD 147 MIIBUS_MEDIAINIT(sc->mii_dev); 148 return(0); 149 } 150 151 static int 152 amphy_service(sc, mii, cmd) 153 struct mii_softc *sc; 154 struct mii_data *mii; 155 int cmd; 156 { 157 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 158 int reg; 159 160 switch (cmd) { 161 case MII_POLLSTAT: 162 /* 163 * If we're not polling our PHY instance, just return. 164 */ 165 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 166 return (0); 167 break; 168 169 case MII_MEDIACHG: 170 /* 171 * If the media indicates a different PHY instance, 172 * isolate ourselves. 173 */ 174 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 175 reg = PHY_READ(sc, MII_BMCR); 176 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 177 return (0); 178 } 179 180 /* 181 * If the interface is not up, don't do anything. 182 */ 183 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 184 break; 185 186 switch (IFM_SUBTYPE(ife->ifm_media)) { 187 case IFM_AUTO: 188 /* 189 * If we're already in auto mode, just return. 190 */ 191 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 192 return (0); 193 (void) mii_phy_auto(sc); 194 break; 195 case IFM_100_T4: 196 /* 197 * XXX Not supported as a manual setting right now. 198 */ 199 return (EINVAL); 200 default: 201 /* 202 * BMCR data is stored in the ifmedia entry. 203 */ 204 PHY_WRITE(sc, MII_ANAR, 205 mii_anar(ife->ifm_media)); 206 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 207 } 208 break; 209 210 case MII_TICK: 211 /* 212 * If we're not currently selected, just return. 213 */ 214 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 215 return (0); 216 if (mii_phy_tick(sc) == EJUSTRETURN) 217 return (0); 218 break; 219 } 220 221 /* Update the media status. */ 222 amphy_status(sc); 223 224 /* Callback if something changed. */ 225 mii_phy_update(sc, cmd); 226 return (0); 227 } 228 229 static void 230 amphy_status(sc) 231 struct mii_softc *sc; 232 { 233 struct mii_data *mii = sc->mii_pdata; 234 int bmsr, bmcr, par, anlpar; 235 236 mii->mii_media_status = IFM_AVALID; 237 mii->mii_media_active = IFM_ETHER; 238 239 bmsr = PHY_READ(sc, MII_BMSR) | 240 PHY_READ(sc, MII_BMSR); 241 if (bmsr & BMSR_LINK) 242 mii->mii_media_status |= IFM_ACTIVE; 243 244 bmcr = PHY_READ(sc, MII_BMCR); 245 if (bmcr & BMCR_ISO) { 246 mii->mii_media_active |= IFM_NONE; 247 mii->mii_media_status = 0; 248 return; 249 } 250 251 if (bmcr & BMCR_LOOP) 252 mii->mii_media_active |= IFM_LOOP; 253 254 if (bmcr & BMCR_AUTOEN) { 255 /* 256 * The PAR status bits are only valid of autonegotiation 257 * has completed (or it's disabled). 258 */ 259 if ((bmsr & BMSR_ACOMP) == 0) { 260 /* Erg, still trying, I guess... */ 261 mii->mii_media_active |= IFM_NONE; 262 return; 263 } 264 265 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 266 anlpar = PHY_READ(sc, MII_ANAR) & 267 PHY_READ(sc, MII_ANLPAR); 268 if (anlpar & ANLPAR_T4) 269 mii->mii_media_active |= IFM_100_T4; 270 else if (anlpar & ANLPAR_TX_FD) 271 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 272 else if (anlpar & ANLPAR_TX) 273 mii->mii_media_active |= IFM_100_TX; 274 else if (anlpar & ANLPAR_10_FD) 275 mii->mii_media_active |= IFM_10_T|IFM_FDX; 276 else if (anlpar & ANLPAR_10) 277 mii->mii_media_active |= IFM_10_T; 278 else 279 mii->mii_media_active |= IFM_NONE; 280 return; 281 } 282 283 /* 284 * Link partner is not capable of autonegotiation. 285 */ 286 par = PHY_READ(sc, MII_AMPHY_DSCSR); 287 if (par & DSCSR_100FDX) 288 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 289 else if (par & DSCSR_100HDX) 290 mii->mii_media_active |= IFM_100_TX; 291 else if (par & DSCSR_10FDX) 292 mii->mii_media_active |= IFM_10_T|IFM_HDX; 293 else if (par & DSCSR_10HDX) 294 mii->mii_media_active |= IFM_10_T; 295 } else 296 mii->mii_media_active = mii_media_from_bmcr(bmcr); 297 } 298