1 /* 2 * Copyright (c) 1997, 1998, 1999 3 * Bill Paul <wpaul@ctr.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/rlphy.c,v 1.2.2.4 2002/11/08 21:53:49 semenu Exp $ 33 * $DragonFly: src/sys/dev/netif/mii_layer/rlphy.c,v 1.6 2005/02/21 18:40:36 joerg Exp $ 34 */ 35 36 /* 37 * driver for RealTek 8139 internal PHYs 38 */ 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/socket.h> 44 #include <sys/bus.h> 45 46 #include <net/if.h> 47 #include <net/if_arp.h> 48 #include <net/if_media.h> 49 50 #include "mii.h" 51 #include "miivar.h" 52 #include "miidevs.h" 53 54 #include <machine/bus.h> 55 #include "../rl/if_rlreg.h" 56 57 #include "miibus_if.h" 58 59 static int rlphy_probe (device_t); 60 static int rlphy_attach (device_t); 61 static int rlphy_detach (device_t); 62 63 static device_method_t rlphy_methods[] = { 64 /* device interface */ 65 DEVMETHOD(device_probe, rlphy_probe), 66 DEVMETHOD(device_attach, rlphy_attach), 67 DEVMETHOD(device_detach, rlphy_detach), 68 DEVMETHOD(device_shutdown, bus_generic_shutdown), 69 { 0, 0 } 70 }; 71 72 static devclass_t rlphy_devclass; 73 74 static driver_t rlphy_driver = { 75 "rlphy", 76 rlphy_methods, 77 sizeof(struct mii_softc) 78 }; 79 80 DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, 0, 0); 81 82 int rlphy_service (struct mii_softc *, struct mii_data *, int); 83 void rlphy_status (struct mii_softc *); 84 85 static int rlphy_probe(dev) 86 device_t dev; 87 { 88 struct mii_attach_args *ma; 89 device_t parent; 90 91 ma = device_get_ivars(dev); 92 parent = device_get_parent(device_get_parent(dev)); 93 94 /* Test for RealTek 8201L PHY */ 95 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_REALTEK && 96 MII_MODEL(ma->mii_id2) == MII_MODEL_REALTEK_RTL8201L) { 97 device_set_desc(dev, MII_STR_REALTEK_RTL8201L); 98 return(0); 99 } 100 101 /* 102 * RealTek PHY doesn't have vendor/device ID registers: 103 * the rl driver fakes up a return value of all zeros. 104 */ 105 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 || 106 MII_MODEL(ma->mii_id2) != 0) 107 return (ENXIO); 108 109 /* 110 * Make sure the parent is an `rl'. 111 */ 112 if (strcmp(device_get_name(parent), "rl") != 0) 113 return (ENXIO); 114 115 device_set_desc(dev, "RealTek internal media interface"); 116 117 return (0); 118 } 119 120 static int rlphy_attach(dev) 121 device_t dev; 122 { 123 struct mii_softc *sc; 124 struct mii_attach_args *ma; 125 struct mii_data *mii; 126 127 sc = device_get_softc(dev); 128 ma = device_get_ivars(dev); 129 mii_softc_init(sc); 130 sc->mii_dev = device_get_parent(dev); 131 mii = device_get_softc(sc->mii_dev); 132 133 /* 134 * The RealTek PHY can never be isolated, so never allow non-zero 135 * instances! 136 */ 137 if (mii->mii_instance != 0) { 138 device_printf(dev, "ignoring this PHY, non-zero instance\n"); 139 return(ENXIO); 140 } 141 142 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 143 144 sc->mii_inst = mii->mii_instance; 145 sc->mii_phy = ma->mii_phyno; 146 sc->mii_service = rlphy_service; 147 sc->mii_pdata = mii; 148 mii->mii_instance++; 149 150 sc->mii_flags |= MIIF_NOISOLATE; 151 152 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 153 154 #if 0 /* See above. */ 155 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 156 BMCR_ISO); 157 #endif 158 159 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 160 BMCR_LOOP|BMCR_S100); 161 162 mii_phy_reset(sc); 163 164 sc->mii_capabilities = 165 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 166 device_printf(dev, " "); 167 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 168 printf("no media present"); 169 else 170 mii_add_media(mii, sc->mii_capabilities, 171 sc->mii_inst); 172 printf("\n"); 173 #undef ADD 174 MIIBUS_MEDIAINIT(sc->mii_dev); 175 return(0); 176 } 177 178 static int rlphy_detach(dev) 179 device_t dev; 180 { 181 struct mii_softc *sc; 182 struct mii_data *mii; 183 184 sc = device_get_softc(dev); 185 mii = device_get_softc(device_get_softc(dev)); 186 mii_phy_auto_stop(sc); 187 sc->mii_dev = NULL; 188 LIST_REMOVE(sc, mii_list); 189 190 return(0); 191 } 192 193 int 194 rlphy_service(sc, mii, cmd) 195 struct mii_softc *sc; 196 struct mii_data *mii; 197 int cmd; 198 { 199 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 200 201 /* 202 * We can't isolate the RealTek PHY, so it has to be the only one! 203 */ 204 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 205 panic("rlphy_service: can't isolate RealTek PHY"); 206 207 switch (cmd) { 208 case MII_POLLSTAT: 209 break; 210 211 case MII_MEDIACHG: 212 /* 213 * If the interface is not up, don't do anything. 214 */ 215 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 216 break; 217 218 switch (IFM_SUBTYPE(ife->ifm_media)) { 219 case IFM_AUTO: 220 /* 221 * If we're already in auto mode, just return. 222 */ 223 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 224 return (0); 225 (void) mii_phy_auto(sc, 0); 226 break; 227 case IFM_100_T4: 228 /* 229 * XXX Not supported as a manual setting right now. 230 */ 231 return (EINVAL); 232 default: 233 /* 234 * BMCR data is stored in the ifmedia entry. 235 */ 236 PHY_WRITE(sc, MII_ANAR, 237 mii_anar(ife->ifm_media)); 238 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 239 } 240 break; 241 242 case MII_TICK: 243 /* 244 * Only used for autonegotiation. 245 */ 246 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 247 return (0); 248 249 /* 250 * Is the interface even up? 251 */ 252 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 253 return (0); 254 255 /* 256 * Only retry autonegotiation every 5 seconds. 257 */ 258 if (++sc->mii_ticks != 5) 259 return (0); 260 261 sc->mii_ticks = 0; 262 263 /* 264 * The RealTek PHY's autonegotiation doesn't need to be 265 * kicked; it continues in the background. 266 */ 267 break; 268 } 269 270 /* Update the media status. */ 271 rlphy_status(sc); 272 273 /* Callback if something changed. */ 274 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 275 MIIBUS_STATCHG(sc->mii_dev); 276 sc->mii_active = mii->mii_media_active; 277 } 278 return (0); 279 } 280 281 void 282 rlphy_status(phy) 283 struct mii_softc *phy; 284 { 285 struct mii_data *mii = phy->mii_pdata; 286 int bmsr, bmcr, anlpar; 287 device_t parent; 288 289 mii->mii_media_status = IFM_AVALID; 290 mii->mii_media_active = IFM_ETHER; 291 292 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 293 if (bmsr & BMSR_LINK) 294 mii->mii_media_status |= IFM_ACTIVE; 295 296 bmcr = PHY_READ(phy, MII_BMCR); 297 if (bmcr & BMCR_ISO) { 298 mii->mii_media_active |= IFM_NONE; 299 mii->mii_media_status = 0; 300 return; 301 } 302 303 if (bmcr & BMCR_LOOP) 304 mii->mii_media_active |= IFM_LOOP; 305 306 if (bmcr & BMCR_AUTOEN) { 307 /* 308 * NWay autonegotiation takes the highest-order common 309 * bit of the ANAR and ANLPAR (i.e. best media advertised 310 * both by us and our link partner). 311 */ 312 if ((bmsr & BMSR_ACOMP) == 0) { 313 /* Erg, still trying, I guess... */ 314 mii->mii_media_active |= IFM_NONE; 315 return; 316 } 317 318 if ((anlpar = PHY_READ(phy, MII_ANAR) & 319 PHY_READ(phy, MII_ANLPAR))) { 320 if (anlpar & ANLPAR_T4) 321 mii->mii_media_active |= IFM_100_T4; 322 else if (anlpar & ANLPAR_TX_FD) 323 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 324 else if (anlpar & ANLPAR_TX) 325 mii->mii_media_active |= IFM_100_TX; 326 else if (anlpar & ANLPAR_10_FD) 327 mii->mii_media_active |= IFM_10_T|IFM_FDX; 328 else if (anlpar & ANLPAR_10) 329 mii->mii_media_active |= IFM_10_T; 330 else 331 mii->mii_media_active |= IFM_NONE; 332 return; 333 } 334 /* 335 * If the other side doesn't support NWAY, then the 336 * best we can do is determine if we have a 10Mbps or 337 * 100Mbps link. There's no way to know if the link 338 * is full or half duplex, so we default to half duplex 339 * and hope that the user is clever enough to manually 340 * change the media settings if we're wrong. 341 */ 342 343 344 /* 345 * The RealTek PHY supports non-NWAY link speed 346 * detection, however it does not report the link 347 * detection results via the ANLPAR or BMSR registers. 348 * (What? RealTek doesn't do things the way everyone 349 * else does? I'm just shocked, shocked I tell you.) 350 * To determine the link speed, we have to do one 351 * of two things: 352 * 353 * - If this is a standalone RealTek RTL8201(L) PHY, 354 * we can determine the link speed by testing bit 0 355 * in the magic, vendor-specific register at offset 356 * 0x19. 357 * 358 * - If this is a RealTek MAC with integrated PHY, we 359 * can test the 'SPEED10' bit of the MAC's media status 360 * register. 361 */ 362 parent = device_get_parent(phy->mii_dev); 363 if (strcmp(device_get_name(parent), "rl") != 0) { 364 if (PHY_READ(phy, 0x0019) & 0x01) 365 mii->mii_media_active |= IFM_100_TX; 366 else 367 mii->mii_media_active |= IFM_10_T; 368 } else { 369 if (PHY_READ(phy, RL_MEDIASTAT) & 370 RL_MEDIASTAT_SPEED10) 371 mii->mii_media_active |= IFM_10_T; 372 else 373 mii->mii_media_active |= IFM_100_TX; 374 } 375 376 } else 377 mii->mii_media_active = mii_media_from_bmcr(bmcr); 378 } 379