1 /*- 2 * Copyright (c) 2001-2003, Shunsuke Akiyama <akiyama@FreeBSD.org>. 3 * 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/dev/mii/ruephy.c,v 1.1.4.1 2003/07/30 13:57:35 akiyama Exp $ 27 * $DragonFly: src/sys/dev/netif/mii_layer/ruephy.c,v 1.1 2005/09/19 02:53:27 sephe Exp $ 28 */ 29 30 /* 31 * driver for RealTek RTL8150 internal PHY 32 */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/socket.h> 39 #include <sys/bus.h> 40 41 #include <net/if.h> 42 #include <net/if_media.h> 43 44 #include <dev/netif/mii_layer/mii.h> 45 #include <dev/netif/mii_layer/miivar.h> 46 #include <dev/netif/mii_layer/ruephyreg.h> 47 48 #include "miibus_if.h" 49 50 static int ruephy_probe(device_t); 51 static int ruephy_attach(device_t); 52 static int ruephy_detach(device_t); 53 54 static device_method_t ruephy_methods[] = { 55 /* device interface */ 56 DEVMETHOD(device_probe, ruephy_probe), 57 DEVMETHOD(device_attach, ruephy_attach), 58 DEVMETHOD(device_detach, ruephy_detach), 59 DEVMETHOD(device_shutdown, bus_generic_shutdown), 60 { 0, 0 } 61 }; 62 63 static devclass_t ruephy_devclass; 64 65 static driver_t ruephy_driver = { 66 "ruephy", 67 ruephy_methods, 68 sizeof(struct mii_softc) 69 }; 70 71 DRIVER_MODULE(ruephy, miibus, ruephy_driver, ruephy_devclass, 0, 0); 72 73 static int ruephy_service(struct mii_softc *, struct mii_data *, int); 74 static void ruephy_reset(struct mii_softc *); 75 static void ruephy_status(struct mii_softc *); 76 77 static int 78 ruephy_probe(device_t dev) 79 { 80 struct mii_attach_args *ma; 81 device_t parent; 82 83 ma = device_get_ivars(dev); 84 parent = device_get_parent(device_get_parent(dev)); 85 86 /* 87 * RealTek RTL8150 PHY doesn't have vendor/device ID registers: 88 * the rue driver fakes up a return value of all zeros. 89 */ 90 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 || 91 MII_MODEL(ma->mii_id2) != 0) 92 return (ENXIO); 93 94 /* 95 * Make sure the parent is an 'rue'. 96 */ 97 if (strcmp(device_get_name(parent), "rue") != 0) 98 return (ENXIO); 99 100 device_set_desc(dev, "RealTek RTL8150 internal media interface"); 101 102 return (0); 103 } 104 105 static int 106 ruephy_attach(device_t dev) 107 { 108 struct mii_softc *sc; 109 struct mii_attach_args *ma; 110 struct mii_data *mii; 111 112 sc = device_get_softc(dev); 113 ma = device_get_ivars(dev); 114 mii_softc_init(sc); 115 sc->mii_dev = device_get_parent(dev); 116 mii = device_get_softc(sc->mii_dev); 117 118 /* 119 * The RealTek PHY can never be isolated, so never allow non-zero 120 * instances! 121 */ 122 if (mii->mii_instance != 0) { 123 device_printf(dev, "ignoring this PHY, non-zero instance\n"); 124 return (ENXIO); 125 } 126 127 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 128 129 sc->mii_inst = mii->mii_instance; 130 sc->mii_phy = ma->mii_phyno; 131 sc->mii_service = ruephy_service; 132 sc->mii_pdata = mii; 133 mii->mii_instance++; 134 135 sc->mii_flags |= MIIF_NOISOLATE; 136 137 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 138 139 ruephy_reset(sc); 140 141 sc->mii_capabilities = 142 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 143 device_printf(dev, " "); 144 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 145 printf("no media present"); 146 else 147 mii_add_media(mii, sc->mii_capabilities, sc->mii_inst); 148 printf("\n"); 149 150 #undef ADD 151 152 MIIBUS_MEDIAINIT(sc->mii_dev); 153 return (0); 154 } 155 156 static int 157 ruephy_detach(device_t dev) 158 { 159 struct mii_softc *sc; 160 struct mii_data *mii; 161 162 sc = device_get_softc(dev); 163 mii = device_get_softc(device_get_softc(dev)); 164 mii_phy_auto_stop(sc); 165 sc->mii_dev = NULL; 166 LIST_REMOVE(sc, mii_list); 167 168 return (0); 169 } 170 171 static int 172 ruephy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 173 { 174 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 175 int reg; 176 177 /* 178 * We can't isolate the RealTek RTL8150 PHY, 179 * so it has to be the only one! 180 */ 181 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 182 panic("ruephy_service: can't isolate RealTek RTL8150 PHY"); 183 184 switch (cmd) { 185 case MII_POLLSTAT: 186 break; 187 188 case MII_MEDIACHG: 189 /* 190 * If the interface is not up, don't do anything. 191 */ 192 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 193 break; 194 195 switch (IFM_SUBTYPE(ife->ifm_media)) { 196 case IFM_AUTO: 197 /* 198 * If we're already in auto mode, just return. 199 */ 200 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 201 return (0); 202 (void) mii_phy_auto(sc, 1); 203 break; 204 case IFM_100_T4: 205 /* 206 * XXX Not supported as a manual setting right now. 207 */ 208 return (EINVAL); 209 default: 210 /* 211 * BMCR data is stored in the ifmedia entry. 212 */ 213 PHY_WRITE(sc, MII_ANAR, 214 mii_anar(ife->ifm_media)); 215 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 216 } 217 break; 218 219 case MII_TICK: 220 /* 221 * Is the interface even up? 222 */ 223 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 224 return (0); 225 226 /* 227 * Only used for autonegotiation. 228 */ 229 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 230 break; 231 232 /* 233 * Check to see if we have link. If we do, we don't 234 * need to restart the autonegotiation process. Read 235 * the MSR twice in case it's latched. 236 */ 237 reg = PHY_READ(sc, RUEPHY_MII_MSR) | 238 PHY_READ(sc, RUEPHY_MII_MSR); 239 if (reg & RUEPHY_MSR_LINK) 240 break; 241 242 /* 243 * Only retry autonegotiation every 5 seconds. 244 */ 245 if (++sc->mii_ticks != 5) 246 return (0); 247 248 sc->mii_ticks = 0; 249 ruephy_reset(sc); 250 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 251 return (0); 252 break; 253 } 254 255 /* Update the media status. */ 256 ruephy_status(sc); 257 258 /* Callback if something changed. */ 259 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 260 MIIBUS_STATCHG(sc->mii_dev); 261 sc->mii_active = mii->mii_media_active; 262 } 263 264 return (0); 265 } 266 267 static void 268 ruephy_reset(struct mii_softc *sc) 269 { 270 271 mii_phy_reset(sc); 272 273 /* 274 * XXX RealTek RTL8150 PHY doesn't set the BMCR properly after 275 * XXX reset, which breaks autonegotiation. 276 */ 277 PHY_WRITE(sc, MII_BMCR, (BMCR_S100 | BMCR_AUTOEN | BMCR_FDX)); 278 } 279 280 static void 281 ruephy_status(struct mii_softc *phy) 282 { 283 struct mii_data *mii = phy->mii_pdata; 284 int bmsr, bmcr, msr; 285 286 mii->mii_media_status = IFM_AVALID; 287 mii->mii_media_active = IFM_ETHER; 288 289 msr = PHY_READ(phy, RUEPHY_MII_MSR) | PHY_READ(phy, RUEPHY_MII_MSR); 290 if (msr & RUEPHY_MSR_LINK) 291 mii->mii_media_status |= IFM_ACTIVE; 292 293 bmcr = PHY_READ(phy, MII_BMCR); 294 if (bmcr & BMCR_ISO) { 295 mii->mii_media_active |= IFM_NONE; 296 mii->mii_media_status = 0; 297 return; 298 } 299 300 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 301 302 if (bmcr & BMCR_AUTOEN) { 303 if ((bmsr & BMSR_ACOMP) == 0) { 304 /* Erg, still trying, I guess... */ 305 mii->mii_media_active |= IFM_NONE; 306 return; 307 } 308 309 if (msr & RUEPHY_MSR_SPEED100) 310 mii->mii_media_active |= IFM_100_TX; 311 else 312 mii->mii_media_active |= IFM_10_T; 313 314 if (msr & RUEPHY_MSR_DUPLEX) 315 mii->mii_media_active |= IFM_FDX; 316 } else 317 mii->mii_media_active = mii_media_from_bmcr(bmcr); 318 } 319