1 /* $NetBSD: rlphy.c,v 1.22 2008/05/04 17:06:10 xtraeme Exp $ */ 2 /* $OpenBSD: rlphy.c,v 1.20 2005/07/31 05:27:30 pvalchev Exp $ */ 3 4 /* 5 * Copyright (c) 1998, 1999 Jason L. Wright (jason@thought.net) 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 26 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 /* 31 * Driver for the internal PHY found on RTL8139 based nics, based 32 * on drivers for the 'exphy' (Internal 3Com phys) and 'nsphy' 33 * (National Semiconductor DP83840). 34 */ 35 36 /* 37 * Ported to NetBSD by Juan Romero Pardines <xtraeme@NetBSD.org> 38 */ 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: rlphy.c,v 1.22 2008/05/04 17:06:10 xtraeme Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/device.h> 47 #include <sys/socket.h> 48 #include <sys/errno.h> 49 50 #include <net/if.h> 51 #include <net/if_media.h> 52 53 #include <dev/mii/mii.h> 54 #include <dev/mii/miivar.h> 55 #include <dev/mii/miidevs.h> 56 #include <sys/bus.h> 57 #include <dev/ic/rtl81x9reg.h> 58 59 struct rlphy_softc { 60 struct mii_softc sc_mii; 61 int sc_rtl8201l; 62 }; 63 64 int rlphymatch(device_t, cfdata_t, void *); 65 void rlphyattach(device_t, device_t, void *); 66 67 CFATTACH_DECL_NEW(rlphy, sizeof(struct rlphy_softc), 68 rlphymatch, rlphyattach, mii_phy_detach, mii_phy_activate); 69 70 int rlphy_service(struct mii_softc *, struct mii_data *, int); 71 void rlphy_status(struct mii_softc *); 72 73 static void rlphy_reset(struct mii_softc *); 74 75 const struct mii_phy_funcs rlphy_funcs = { 76 rlphy_service, rlphy_status, rlphy_reset, 77 }; 78 79 static const struct mii_phydesc rlphys[] = { 80 { MII_OUI_yyREALTEK, MII_MODEL_yyREALTEK_RTL8201L, 81 MII_STR_yyREALTEK_RTL8201L }, 82 { MII_OUI_ICPLUS, MII_MODEL_ICPLUS_IP101, 83 MII_STR_ICPLUS_IP101 }, 84 85 { 0, 0, 86 NULL }, 87 }; 88 89 int 90 rlphymatch(device_t parent, cfdata_t match, void *aux) 91 { 92 struct mii_attach_args *ma = aux; 93 94 if (mii_phy_match(ma, rlphys) != NULL) 95 return (10); 96 97 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 || 98 MII_MODEL(ma->mii_id2) != 0) 99 return 0; 100 101 if (!device_is_a(parent, "rtk") && !device_is_a(parent, "re")) 102 return 0; 103 104 /* 105 * A "real" phy should get preference, but on the 8139 there 106 * is no phyid register. 107 */ 108 return 5; 109 } 110 111 void 112 rlphyattach(device_t parent, device_t self, void *aux) 113 { 114 struct rlphy_softc *rsc = device_private(self); 115 struct mii_softc *sc = &rsc->sc_mii; 116 struct mii_attach_args *ma = aux; 117 struct mii_data *mii = ma->mii_data; 118 119 aprint_naive("\n"); 120 if (MII_MODEL(ma->mii_id2) == MII_MODEL_yyREALTEK_RTL8201L) { 121 rsc->sc_rtl8201l = 1; 122 aprint_normal(": %s, rev. %d\n", MII_STR_yyREALTEK_RTL8201L, 123 MII_REV(ma->mii_id2)); 124 } else 125 aprint_normal(": Realtek internal PHY\n"); 126 127 sc->mii_dev = self; 128 sc->mii_inst = mii->mii_instance; 129 sc->mii_phy = ma->mii_phyno; 130 sc->mii_funcs = &rlphy_funcs; 131 sc->mii_pdata = mii; 132 sc->mii_flags = ma->mii_flags; 133 134 sc->mii_flags |= MIIF_NOISOLATE; 135 136 PHY_RESET(sc); 137 138 aprint_normal_dev(self, ""); 139 sc->mii_capabilities = 140 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 141 if (sc->mii_capabilities & BMSR_MEDIAMASK) 142 mii_phy_add_media(sc); 143 aprint_normal("\n"); 144 145 if (!pmf_device_register(self, NULL, mii_phy_resume)) 146 aprint_error_dev(self, "couldn't establish power handler\n"); 147 } 148 149 int 150 rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 151 { 152 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 153 154 int rv; 155 156 /* 157 * Can't isolate the RTL8139 phy, so it has to be the only one. 158 */ 159 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 160 panic("rlphy_service: attempt to isolate phy"); 161 162 switch (cmd) { 163 case MII_POLLSTAT: 164 break; 165 166 case MII_MEDIACHG: 167 /* 168 * If the interface is not up, don't do anything. 169 */ 170 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 171 break; 172 173 switch (IFM_SUBTYPE(ife->ifm_media)) { 174 case IFM_AUTO: 175 /* 176 * If we're already in auto mode, just return. 177 */ 178 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 179 return (0); 180 (void) mii_phy_auto(sc, 0); 181 break; 182 case IFM_100_T4: 183 /* 184 * XXX Not supported as a manual setting right now. 185 */ 186 return (EINVAL); 187 default: 188 /* 189 * BMCR data is stored in the ifmedia entry. 190 */ 191 switch (ife->ifm_media & 192 (IFM_TMASK|IFM_NMASK|IFM_FDX)) { 193 case IFM_ETHER|IFM_10_T: 194 rv = ANAR_10|ANAR_CSMA; 195 break; 196 case IFM_ETHER|IFM_10_T|IFM_FDX: 197 rv = ANAR_10_FD|ANAR_CSMA; 198 break; 199 case IFM_ETHER|IFM_100_TX: 200 rv = ANAR_TX|ANAR_CSMA; 201 break; 202 case IFM_ETHER|IFM_100_TX|IFM_FDX: 203 rv = ANAR_TX_FD|ANAR_CSMA; 204 break; 205 case IFM_ETHER|IFM_100_T4: 206 rv = ANAR_T4|ANAR_CSMA; 207 break; 208 default: 209 rv = 0; 210 break; 211 } 212 213 PHY_WRITE(sc, MII_ANAR, rv); 214 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 215 } 216 break; 217 218 case MII_TICK: 219 /* 220 * Is the interface even up? 221 */ 222 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 223 return (0); 224 225 /* 226 * Only used for autonegotiation. 227 */ 228 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 229 break; 230 231 /* 232 * The RealTek PHY's autonegotiation doesn't need to be 233 * kicked; it continues in the background. 234 */ 235 break; 236 237 case MII_DOWN: 238 mii_phy_down(sc); 239 return (0); 240 } 241 242 /* Update the media status. */ 243 mii_phy_status(sc); 244 245 /* Callback if something changed. */ 246 mii_phy_update(sc, cmd); 247 return (0); 248 } 249 250 void 251 rlphy_status(struct mii_softc *sc) 252 { 253 struct rlphy_softc *rsc = (void *)sc; 254 struct mii_data *mii = sc->mii_pdata; 255 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 256 int bmsr, bmcr, anlpar; 257 258 mii->mii_media_status = IFM_AVALID; 259 mii->mii_media_active = IFM_ETHER; 260 261 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 262 if (bmsr & BMSR_LINK) 263 mii->mii_media_status |= IFM_ACTIVE; 264 265 bmcr = PHY_READ(sc, MII_BMCR); 266 if (bmcr & BMCR_ISO) { 267 mii->mii_media_active |= IFM_NONE; 268 mii->mii_media_status = 0; 269 return; 270 } 271 272 if (bmcr & BMCR_LOOP) 273 mii->mii_media_active |= IFM_LOOP; 274 275 if (bmcr & BMCR_AUTOEN) { 276 /* 277 * NWay autonegotiation takes the highest-order common 278 * bit of the ANAR and ANLPAR (i.e. best media advertised 279 * both by us and our link partner). 280 */ 281 if ((bmsr & BMSR_ACOMP) == 0) { 282 /* Erg, still trying, I guess... */ 283 mii->mii_media_active |= IFM_NONE; 284 return; 285 } 286 287 if ((anlpar = PHY_READ(sc, MII_ANAR) & 288 PHY_READ(sc, MII_ANLPAR))) { 289 if (anlpar & ANLPAR_T4) 290 mii->mii_media_active |= IFM_100_T4; 291 else if (anlpar & ANLPAR_TX_FD) 292 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 293 else if (anlpar & ANLPAR_TX) 294 mii->mii_media_active |= IFM_100_TX; 295 else if (anlpar & ANLPAR_10_FD) 296 mii->mii_media_active |= IFM_10_T|IFM_FDX; 297 else if (anlpar & ANLPAR_10) 298 mii->mii_media_active |= IFM_10_T; 299 else 300 mii->mii_media_active |= IFM_NONE; 301 return; 302 } 303 304 /* 305 * If the other side doesn't support NWAY, then the 306 * best we can do is determine if we have a 10Mbps or 307 * 100Mbps link. There's no way to know if the link 308 * is full or half duplex, so we default to half duplex 309 * and hope that the user is clever enough to manually 310 * change the media settings if we're wrong. 311 */ 312 313 /* 314 * The RealTek PHY supports non-NWAY link speed 315 * detection, however it does not report the link 316 * detection results via the ANLPAR or BMSR registers. 317 * (What? RealTek doesn't do things the way everyone 318 * else does? I'm just shocked, shocked I tell you.) 319 * To determine the link speed, we have to do one 320 * of two things: 321 * 322 * - If this is a standalone RealTek RTL8201(L) PHY, 323 * we can determine the link speed by testing bit 0 324 * in the magic, vendor-specific register at offset 325 * 0x19. 326 * 327 * - If this is a RealTek MAC with integrated PHY, we 328 * can test the 'SPEED10' bit of the MAC's media status 329 * register. 330 */ 331 if (rsc->sc_rtl8201l) { 332 if (PHY_READ(sc, 0x0019) & 0x01) 333 mii->mii_media_active |= IFM_100_TX; 334 else 335 mii->mii_media_active |= IFM_10_T; 336 } else { 337 if (PHY_READ(sc, RTK_MEDIASTAT) & RTK_MEDIASTAT_SPEED10) 338 mii->mii_media_active |= IFM_10_T; 339 else 340 mii->mii_media_active |= IFM_100_TX; 341 } 342 343 } else 344 mii->mii_media_active = ife->ifm_media; 345 } 346 347 static void 348 rlphy_reset(struct mii_softc *sc) 349 { 350 351 mii_phy_reset(sc); 352 353 /* 354 * XXX RealTek PHY doesn't set the BMCR properly after 355 * XXX reset, which breaks autonegotiation. 356 */ 357 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN); 358 } 359