1 /* $OpenBSD: rlphy.c,v 1.23 2006/05/16 02:24:45 brad Exp $ */ 2 3 /* 4 * Copyright (c) 1997, 1998, 1999 5 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Bill Paul. 18 * 4. Neither the name of the author nor the names of any co-contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 * 34 * $FreeBSD: src/sys/dev/mii/rlphy.c,v 1.2.2.4 2002/11/08 21:53:49 semenu Exp $ 35 * $DragonFly: src/sys/dev/netif/mii_layer/rlphy.c,v 1.10 2006/08/06 10:32:23 sephe Exp $ 36 */ 37 38 /* 39 * driver for RealTek 8139 internal PHYs 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/socket.h> 46 #include <sys/bus.h> 47 48 #include <net/if.h> 49 #include <net/if_arp.h> 50 #include <net/if_media.h> 51 52 #include "mii.h" 53 #include "miivar.h" 54 #include "miidevs.h" 55 56 #include <machine/bus.h> 57 #include "../rl/if_rlreg.h" 58 59 #include "miibus_if.h" 60 61 static int rlphy_probe(device_t); 62 static int rlphy_attach(device_t); 63 static int rlphy_service(struct mii_softc *, struct mii_data *, int); 64 static void rlphy_status(struct mii_softc *); 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, ukphy_detach), 71 DEVMETHOD(device_shutdown, bus_generic_shutdown), 72 { 0, 0 } 73 }; 74 75 static const struct mii_phydesc rlphys[] = { 76 MII_PHYDESC(REALTEK, RTL8201L), 77 MII_PHYDESC(ICPLUS, IP101), 78 MII_PHYDESC_NULL 79 }; 80 81 static devclass_t rlphy_devclass; 82 83 static driver_t rlphy_driver = { 84 "rlphy", 85 rlphy_methods, 86 sizeof(struct mii_softc) 87 }; 88 89 DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, 0, 0); 90 91 static int 92 rlphy_probe(device_t dev) 93 { 94 struct mii_attach_args *ma = device_get_ivars(dev); 95 const struct mii_phydesc *mpd; 96 device_t parent; 97 98 /* 99 * A "real" phy should get preference, but on the 8139 there 100 * is no phyid register. 101 */ 102 mpd = mii_phy_match(ma, rlphys); 103 if (mpd != NULL) { 104 device_set_desc(dev, mpd->mpd_name); 105 return (0); 106 } 107 108 /* 109 * RealTek PHY doesn't have vendor/device ID registers: 110 * the rl driver fakes up a return value of all zeros. 111 */ 112 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 || 113 MII_MODEL(ma->mii_id2) != 0) 114 return (ENXIO); 115 116 parent = device_get_parent(device_get_parent(dev)); 117 118 /* 119 * Make sure the parent is an `rl'. 120 */ 121 if (strcmp(device_get_name(parent), "rl") != 0) 122 return (ENXIO); 123 124 device_set_desc(dev, "RealTek internal media interface"); 125 126 return (0); 127 } 128 129 static int 130 rlphy_attach(device_t dev) 131 { 132 struct mii_softc *sc; 133 struct mii_attach_args *ma; 134 struct mii_data *mii; 135 136 sc = device_get_softc(dev); 137 ma = device_get_ivars(dev); 138 mii_softc_init(sc, ma); 139 sc->mii_dev = device_get_parent(dev); 140 mii = device_get_softc(sc->mii_dev); 141 142 /* 143 * The RealTek PHY can never be isolated, so never allow non-zero 144 * instances! 145 */ 146 if (mii->mii_instance != 0) { 147 device_printf(dev, "ignoring this PHY, non-zero instance\n"); 148 return(ENXIO); 149 } 150 151 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 152 153 sc->mii_inst = mii->mii_instance; 154 sc->mii_service = rlphy_service; 155 sc->mii_pdata = mii; 156 mii->mii_instance++; 157 158 sc->mii_flags |= MIIF_NOISOLATE; 159 160 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 161 162 #if 0 /* See above. */ 163 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 164 BMCR_ISO); 165 #endif 166 167 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 168 MII_MEDIA_100_TX); 169 170 mii_phy_reset(sc); 171 172 /* 173 * After PHY is reset, BMCR_AUTOEN will be cleared. 174 * If it is *not* turned on here, mii_pollstat() will 175 * lie about the active media until mii_mediachg() is 176 * called(in rl_init()). 177 */ 178 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN); 179 180 sc->mii_capabilities = 181 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 182 device_printf(dev, " "); 183 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 184 printf("no media present"); 185 else 186 mii_phy_add_media(sc); 187 printf("\n"); 188 #undef ADD 189 MIIBUS_MEDIAINIT(sc->mii_dev); 190 return(0); 191 } 192 193 static int 194 rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 195 { 196 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 197 198 /* 199 * We can't isolate the RealTek PHY, so it has to be the only one! 200 */ 201 KASSERT(IFM_INST(ife->ifm_media) == sc->mii_inst, 202 ("rlphy_service: can't isolate RealTek PHY")); 203 204 switch (cmd) { 205 case MII_POLLSTAT: 206 break; 207 208 case MII_MEDIACHG: 209 /* 210 * If the interface is not up, don't do anything. 211 */ 212 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 213 break; 214 215 if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_T4) { 216 /* 217 * XXX Not supported as a manual setting right now. 218 */ 219 return (EINVAL); 220 } 221 222 mii_phy_set_media(sc); 223 break; 224 225 case MII_TICK: 226 /* 227 * Is the interface even up? 228 */ 229 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 230 return (0); 231 232 /* 233 * Only used for autonegotiation. 234 */ 235 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 236 break; 237 238 /* 239 * The RealTek PHY's autonegotiation doesn't need to be 240 * kicked; it continues in the background. 241 */ 242 break; 243 } 244 245 /* Update the media status. */ 246 rlphy_status(sc); 247 248 /* Callback if something changed. */ 249 mii_phy_update(sc, cmd); 250 return (0); 251 } 252 253 static void 254 rlphy_status(struct mii_softc *sc) 255 { 256 struct mii_data *mii = sc->mii_pdata; 257 int bmsr, bmcr, anlpar; 258 259 mii->mii_media_status = IFM_AVALID; 260 mii->mii_media_active = IFM_ETHER; 261 262 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 263 if (bmsr & BMSR_LINK) 264 mii->mii_media_status |= IFM_ACTIVE; 265 266 bmcr = PHY_READ(sc, MII_BMCR); 267 if (bmcr & BMCR_ISO) { 268 mii->mii_media_active |= IFM_NONE; 269 mii->mii_media_status = 0; 270 return; 271 } 272 273 if (bmcr & BMCR_LOOP) 274 mii->mii_media_active |= IFM_LOOP; 275 276 if (bmcr & BMCR_AUTOEN) { 277 device_t parent; 278 279 /* 280 * NWay autonegotiation takes the highest-order common 281 * bit of the ANAR and ANLPAR (i.e. best media advertised 282 * both by us and our link partner). 283 */ 284 if ((bmsr & BMSR_ACOMP) == 0) { 285 /* Erg, still trying, I guess... */ 286 mii->mii_media_active |= IFM_NONE; 287 return; 288 } 289 290 if ((anlpar = PHY_READ(sc, MII_ANAR) & 291 PHY_READ(sc, MII_ANLPAR))) { 292 if (anlpar & ANLPAR_T4) 293 mii->mii_media_active |= IFM_100_T4; 294 else if (anlpar & ANLPAR_TX_FD) 295 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 296 else if (anlpar & ANLPAR_TX) 297 mii->mii_media_active |= IFM_100_TX; 298 else if (anlpar & ANLPAR_10_FD) 299 mii->mii_media_active |= IFM_10_T|IFM_FDX; 300 else if (anlpar & ANLPAR_10) 301 mii->mii_media_active |= IFM_10_T; 302 else 303 mii->mii_media_active |= IFM_NONE; 304 return; 305 } 306 /* 307 * If the other side doesn't support NWAY, then the 308 * best we can do is determine if we have a 10Mbps or 309 * 100Mbps link. There's no way to know if the link 310 * is full or half duplex, so we default to half duplex 311 * and hope that the user is clever enough to manually 312 * change the media settings if we're wrong. 313 */ 314 315 /* 316 * The RealTek PHY supports non-NWAY link speed 317 * detection, however it does not report the link 318 * detection results via the ANLPAR or BMSR registers. 319 * (What? RealTek doesn't do things the way everyone 320 * else does? I'm just shocked, shocked I tell you.) 321 * To determine the link speed, we have to do one 322 * of two things: 323 * 324 * - If this is a standalone RealTek RTL8201(L) PHY, 325 * we can determine the link speed by testing bit 0 326 * in the magic, vendor-specific register at offset 327 * 0x19. 328 * 329 * - If this is a RealTek MAC with integrated PHY, we 330 * can test the 'SPEED10' bit of the MAC's media status 331 * register. 332 */ 333 parent = device_get_parent(sc->mii_dev); 334 if (strcmp(device_get_name(parent), "rl") != 0) { 335 if (PHY_READ(sc, 0x0019) & 0x01) 336 mii->mii_media_active |= IFM_100_TX; 337 else 338 mii->mii_media_active |= IFM_10_T; 339 } else { 340 if (PHY_READ(sc, RL_MEDIASTAT) & 341 RL_MEDIASTAT_SPEED10) 342 mii->mii_media_active |= IFM_10_T; 343 else 344 mii->mii_media_active |= IFM_100_TX; 345 } 346 } else { 347 mii->mii_media_active = mii->mii_media.ifm_cur->ifm_media; 348 } 349 } 350