Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/rlphy.c
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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: releng/5.0/sys/dev/mii/rlphy.c 105135 2002-10-14 22:31:52Z alfred $ 33 */ 34 35 /* 36 * driver for RealTek 8139 internal PHYs 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/socket.h> 43 #include <sys/bus.h> 44 45 #include <net/if.h> 46 #include <net/if_arp.h> 47 #include <net/if_media.h> 48 49 #include <dev/mii/mii.h> 50 #include <dev/mii/miivar.h> 51 #include <dev/mii/miidevs.h> 52 53 #include <machine/bus.h> 54 #include <pci/if_rlreg.h> 55 56 #include "miibus_if.h" 57 58 #if !defined(lint) 59 static const char rcsid[] = 60 "$FreeBSD: releng/5.0/sys/dev/mii/rlphy.c 105135 2002-10-14 22:31:52Z alfred $"; 61 #endif 62 63 static int rlphy_probe(device_t); 64 static int rlphy_attach(device_t); 65 66 static device_method_t rlphy_methods[] = { 67 /* device interface */ 68 DEVMETHOD(device_probe, rlphy_probe), 69 DEVMETHOD(device_attach, rlphy_attach), 70 DEVMETHOD(device_detach, mii_phy_detach), 71 DEVMETHOD(device_shutdown, bus_generic_shutdown), 72 { 0, 0 } 73 }; 74 75 static devclass_t rlphy_devclass; 76 77 static driver_t rlphy_driver = { 78 "rlphy", 79 rlphy_methods, 80 sizeof(struct mii_softc) 81 }; 82 83 DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, 0, 0); 84 85 static int rlphy_service(struct mii_softc *, struct mii_data *, int); 86 static void rlphy_status(struct mii_softc *); 87 88 static int 89 rlphy_probe(dev) 90 device_t dev; 91 { 92 struct mii_attach_args *ma; 93 device_t parent; 94 95 ma = device_get_ivars(dev); 96 parent = device_get_parent(device_get_parent(dev)); 97 98 /* Test for RealTek 8201L PHY */ 99 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_REALTEK && 100 MII_MODEL(ma->mii_id2) == MII_MODEL_REALTEK_RTL8201L) { 101 device_set_desc(dev, MII_STR_REALTEK_RTL8201L); 102 return(0); 103 } 104 105 /* 106 * RealTek PHY doesn't have vendor/device ID registers: 107 * the rl driver fakes up a return value of all zeros. 108 */ 109 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 || 110 MII_MODEL(ma->mii_id2) != 0) 111 return (ENXIO); 112 113 /* 114 * Make sure the parent is an `rl'. 115 */ 116 if (strcmp(device_get_name(parent), "rl") != 0) 117 return (ENXIO); 118 119 device_set_desc(dev, "RealTek internal media interface"); 120 121 return (0); 122 } 123 124 static int 125 rlphy_attach(dev) 126 device_t dev; 127 { 128 struct mii_softc *sc; 129 struct mii_attach_args *ma; 130 struct mii_data *mii; 131 132 sc = device_get_softc(dev); 133 ma = device_get_ivars(dev); 134 sc->mii_dev = device_get_parent(dev); 135 mii = device_get_softc(sc->mii_dev); 136 137 /* 138 * The RealTek PHY can never be isolated, so never allow non-zero 139 * instances! 140 */ 141 if (mii->mii_instance != 0) { 142 device_printf(dev, "ignoring this PHY, non-zero instance\n"); 143 return(ENXIO); 144 } 145 146 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 147 148 sc->mii_inst = mii->mii_instance; 149 sc->mii_phy = ma->mii_phyno; 150 sc->mii_service = rlphy_service; 151 sc->mii_pdata = mii; 152 mii->mii_instance++; 153 154 sc->mii_flags |= MIIF_NOISOLATE; 155 156 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 157 158 #if 0 /* See above. */ 159 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 160 BMCR_ISO); 161 #endif 162 163 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 164 BMCR_LOOP|BMCR_S100); 165 166 mii_phy_reset(sc); 167 168 sc->mii_capabilities = 169 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 170 device_printf(dev, " "); 171 mii_add_media(sc); 172 printf("\n"); 173 #undef ADD 174 MIIBUS_MEDIAINIT(sc->mii_dev); 175 return(0); 176 } 177 178 static int 179 rlphy_service(sc, mii, cmd) 180 struct mii_softc *sc; 181 struct mii_data *mii; 182 int cmd; 183 { 184 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 185 186 /* 187 * We can't isolate the RealTek PHY, so it has to be the only one! 188 */ 189 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 190 panic("rlphy_service: can't isolate RealTek PHY"); 191 192 switch (cmd) { 193 case MII_POLLSTAT: 194 break; 195 196 case MII_MEDIACHG: 197 /* 198 * If the interface is not up, don't do anything. 199 */ 200 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 201 break; 202 203 switch (IFM_SUBTYPE(ife->ifm_media)) { 204 case IFM_AUTO: 205 /* 206 * If we're already in auto mode, just return. 207 */ 208 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 209 return (0); 210 (void) mii_phy_auto(sc); 211 break; 212 case IFM_100_T4: 213 /* 214 * XXX Not supported as a manual setting right now. 215 */ 216 return (EINVAL); 217 default: 218 /* 219 * BMCR data is stored in the ifmedia entry. 220 */ 221 PHY_WRITE(sc, MII_ANAR, 222 mii_anar(ife->ifm_media)); 223 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 224 } 225 break; 226 227 case MII_TICK: 228 /* 229 * Is the interface even up? 230 */ 231 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 232 return (0); 233 234 /* 235 * Only used for autonegotiation. 236 */ 237 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 238 break; 239 240 /* 241 * The RealTek PHY's autonegotiation doesn't need to be 242 * kicked; it continues in the background. 243 */ 244 break; 245 } 246 247 /* Update the media status. */ 248 rlphy_status(sc); 249 250 /* Callback if something changed. */ 251 mii_phy_update(sc, cmd); 252 return (0); 253 } 254 255 static void 256 rlphy_status(phy) 257 struct mii_softc *phy; 258 { 259 struct mii_data *mii = phy->mii_pdata; 260 int bmsr, bmcr, anlpar; 261 device_t parent; 262 263 mii->mii_media_status = IFM_AVALID; 264 mii->mii_media_active = IFM_ETHER; 265 266 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 267 if (bmsr & BMSR_LINK) 268 mii->mii_media_status |= IFM_ACTIVE; 269 270 bmcr = PHY_READ(phy, MII_BMCR); 271 if (bmcr & BMCR_ISO) { 272 mii->mii_media_active |= IFM_NONE; 273 mii->mii_media_status = 0; 274 return; 275 } 276 277 if (bmcr & BMCR_LOOP) 278 mii->mii_media_active |= IFM_LOOP; 279 280 if (bmcr & BMCR_AUTOEN) { 281 /* 282 * NWay autonegotiation takes the highest-order common 283 * bit of the ANAR and ANLPAR (i.e. best media advertised 284 * both by us and our link partner). 285 */ 286 if ((bmsr & BMSR_ACOMP) == 0) { 287 /* Erg, still trying, I guess... */ 288 mii->mii_media_active |= IFM_NONE; 289 return; 290 } 291 292 if ((anlpar = PHY_READ(phy, MII_ANAR) & 293 PHY_READ(phy, MII_ANLPAR))) { 294 if (anlpar & ANLPAR_T4) 295 mii->mii_media_active |= IFM_100_T4; 296 else if (anlpar & ANLPAR_TX_FD) 297 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 298 else if (anlpar & ANLPAR_TX) 299 mii->mii_media_active |= IFM_100_TX; 300 else if (anlpar & ANLPAR_10_FD) 301 mii->mii_media_active |= IFM_10_T|IFM_FDX; 302 else if (anlpar & ANLPAR_10) 303 mii->mii_media_active |= IFM_10_T; 304 else 305 mii->mii_media_active |= IFM_NONE; 306 return; 307 } 308 /* 309 * If the other side doesn't support NWAY, then the 310 * best we can do is determine if we have a 10Mbps or 311 * 100Mbps link. There's no way to know if the link 312 * is full or half duplex, so we default to half duplex 313 * and hope that the user is clever enough to manually 314 * change the media settings if we're wrong. 315 */ 316 317 318 /* 319 * The RealTek PHY supports non-NWAY link speed 320 * detection, however it does not report the link 321 * detection results via the ANLPAR or BMSR registers. 322 * (What? RealTek doesn't do things the way everyone 323 * else does? I'm just shocked, shocked I tell you.) 324 * To determine the link speed, we have to do one 325 * of two things: 326 * 327 * - If this is a standalone RealTek RTL8201(L) PHY, 328 * we can determine the link speed by testing bit 0 329 * in the magic, vendor-specific register at offset 330 * 0x19. 331 * 332 * - If this is a RealTek MAC with integrated PHY, we 333 * can test the 'SPEED10' bit of the MAC's media status 334 * register. 335 */ 336 parent = device_get_parent(phy->mii_dev); 337 if (strcmp(device_get_name(parent), "rl") != 0) { 338 if (PHY_READ(phy, 0x0019) & 0x01) 339 mii->mii_media_active |= IFM_100_TX; 340 else 341 mii->mii_media_active |= IFM_10_T; 342 } else { 343 if (PHY_READ(phy, RL_MEDIASTAT) & 344 RL_MEDIASTAT_SPEED10) 345 mii->mii_media_active |= IFM_10_T; 346 else 347 mii->mii_media_active |= IFM_100_TX; 348 } 349 350 } else 351 mii->mii_media_active = mii_media_from_bmcr(bmcr); 352 }
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