rlphy.c revision 94149
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: head/sys/dev/mii/rlphy.c 94149 2002-04-07 20:55:50Z wpaul $ 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) 59static const char rcsid[] = 60 "$FreeBSD: head/sys/dev/mii/rlphy.c 94149 2002-04-07 20:55:50Z wpaul $"; 61#endif 62 63static int rlphy_probe (device_t); 64static int rlphy_attach (device_t); 65static int rlphy_detach (device_t); 66 67static device_method_t rlphy_methods[] = { 68 /* device interface */ 69 DEVMETHOD(device_probe, rlphy_probe), 70 DEVMETHOD(device_attach, rlphy_attach), 71 DEVMETHOD(device_detach, rlphy_detach), 72 DEVMETHOD(device_shutdown, bus_generic_shutdown), 73 { 0, 0 } 74}; 75 76static devclass_t rlphy_devclass; 77 78static driver_t rlphy_driver = { 79 "rlphy", 80 rlphy_methods, 81 sizeof(struct mii_softc) 82}; 83 84DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, 0, 0); 85 86static int rlphy_service(struct mii_softc *, struct mii_data *, int); 87static void rlphy_status(struct mii_softc *); 88 89static int 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 124static int rlphy_attach(dev) 125 device_t dev; 126{ 127 struct mii_softc *sc; 128 struct mii_attach_args *ma; 129 struct mii_data *mii; 130 131 sc = device_get_softc(dev); 132 ma = device_get_ivars(dev); 133 sc->mii_dev = device_get_parent(dev); 134 mii = device_get_softc(sc->mii_dev); 135 136 /* 137 * The RealTek PHY can never be isolated, so never allow non-zero 138 * instances! 139 */ 140 if (mii->mii_instance != 0) { 141 device_printf(dev, "ignoring this PHY, non-zero instance\n"); 142 return(ENXIO); 143 } 144 145 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 146 147 sc->mii_inst = mii->mii_instance; 148 sc->mii_phy = ma->mii_phyno; 149 sc->mii_service = rlphy_service; 150 sc->mii_pdata = mii; 151 mii->mii_instance++; 152 153 sc->mii_flags |= MIIF_NOISOLATE; 154 155#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 156 157#if 0 /* See above. */ 158 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 159 BMCR_ISO); 160#endif 161 162 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 163 BMCR_LOOP|BMCR_S100); 164 165 mii_phy_reset(sc); 166 167 sc->mii_capabilities = 168 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 169 device_printf(dev, " "); 170 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 171 printf("no media present"); 172 else 173 mii_add_media(mii, sc->mii_capabilities, 174 sc->mii_inst); 175 printf("\n"); 176#undef ADD 177 MIIBUS_MEDIAINIT(sc->mii_dev); 178 return(0); 179} 180 181static int rlphy_detach(dev) 182 device_t dev; 183{ 184 struct mii_softc *sc; 185 struct mii_data *mii; 186 187 sc = device_get_softc(dev); 188 mii = device_get_softc(device_get_softc(dev)); 189 mii_phy_auto_stop(sc); 190 sc->mii_dev = NULL; 191 LIST_REMOVE(sc, mii_list); 192 193 return(0); 194} 195 196static int 197rlphy_service(sc, mii, cmd) 198 struct mii_softc *sc; 199 struct mii_data *mii; 200 int cmd; 201{ 202 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 203 204 /* 205 * We can't isolate the RealTek PHY, so it has to be the only one! 206 */ 207 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 208 panic("rlphy_service: can't isolate RealTek PHY"); 209 210 switch (cmd) { 211 case MII_POLLSTAT: 212 break; 213 214 case MII_MEDIACHG: 215 /* 216 * If the interface is not up, don't do anything. 217 */ 218 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 219 break; 220 221 switch (IFM_SUBTYPE(ife->ifm_media)) { 222 case IFM_AUTO: 223 /* 224 * If we're already in auto mode, just return. 225 */ 226 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 227 return (0); 228 (void) mii_phy_auto(sc, 0); 229 break; 230 case IFM_100_T4: 231 /* 232 * XXX Not supported as a manual setting right now. 233 */ 234 return (EINVAL); 235 default: 236 /* 237 * BMCR data is stored in the ifmedia entry. 238 */ 239 PHY_WRITE(sc, MII_ANAR, 240 mii_anar(ife->ifm_media)); 241 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 242 } 243 break; 244 245 case MII_TICK: 246 /* 247 * Is the interface even up? 248 */ 249 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 250 return (0); 251 252 /* 253 * Only used for autonegotiation. 254 */ 255 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 256 break; 257 258 /* 259 * The RealTek PHY's autonegotiation doesn't need to be 260 * kicked; it continues in the background. 261 */ 262 break; 263 } 264 265 /* Update the media status. */ 266 rlphy_status(sc); 267 268 /* Callback if something changed. */ 269 mii_phy_update(sc, cmd); 270 return (0); 271} 272 273void 274rlphy_status(phy) 275 struct mii_softc *phy; 276{ 277 struct mii_data *mii = phy->mii_pdata; 278 int bmsr, bmcr, anlpar; 279 device_t parent; 280 281 mii->mii_media_status = IFM_AVALID; 282 mii->mii_media_active = IFM_ETHER; 283 284 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 285 if (bmsr & BMSR_LINK) 286 mii->mii_media_status |= IFM_ACTIVE; 287 288 bmcr = PHY_READ(phy, MII_BMCR); 289 if (bmcr & BMCR_ISO) { 290 mii->mii_media_active |= IFM_NONE; 291 mii->mii_media_status = 0; 292 return; 293 } 294 295 if (bmcr & BMCR_LOOP) 296 mii->mii_media_active |= IFM_LOOP; 297 298 if (bmcr & BMCR_AUTOEN) { 299 /* 300 * NWay autonegotiation takes the highest-order common 301 * bit of the ANAR and ANLPAR (i.e. best media advertised 302 * both by us and our link partner). 303 */ 304 if ((bmsr & BMSR_ACOMP) == 0) { 305 /* Erg, still trying, I guess... */ 306 mii->mii_media_active |= IFM_NONE; 307 return; 308 } 309 310 if ((anlpar = PHY_READ(phy, MII_ANAR) & 311 PHY_READ(phy, MII_ANLPAR))) { 312 if (anlpar & ANLPAR_T4) 313 mii->mii_media_active |= IFM_100_T4; 314 else if (anlpar & ANLPAR_TX_FD) 315 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 316 else if (anlpar & ANLPAR_TX) 317 mii->mii_media_active |= IFM_100_TX; 318 else if (anlpar & ANLPAR_10_FD) 319 mii->mii_media_active |= IFM_10_T|IFM_FDX; 320 else if (anlpar & ANLPAR_10) 321 mii->mii_media_active |= IFM_10_T; 322 else 323 mii->mii_media_active |= IFM_NONE; 324 return; 325 } 326 /* 327 * If the other side doesn't support NWAY, then the 328 * best we can do is determine if we have a 10Mbps or 329 * 100Mbps link. There's no way to know if the link 330 * is full or half duplex, so we default to half duplex 331 * and hope that the user is clever enough to manually 332 * change the media settings if we're wrong. 333 */ 334 335 336 /* 337 * The RealTek PHY supports non-NWAY link speed 338 * detection, however it does not report the link 339 * detection results via the ANLPAR or BMSR registers. 340 * (What? RealTek doesn't do things the way everyone 341 * else does? I'm just shocked, shocked I tell you.) 342 * To determine the link speed, we have to do one 343 * of two things: 344 * 345 * - If this is a standalone RealTek RTL8201(L) PHY, 346 * we can determine the link speed by testing bit 0 347 * in the magic, vendor-specific register at offset 348 * 0x19. 349 * 350 * - If this is a RealTek MAC with integrated PHY, we 351 * can test the 'SPEED10' bit of the MAC's media status 352 * register. 353 */ 354 parent = device_get_parent(phy->mii_dev); 355 if (strcmp(device_get_name(parent), "rl") != 0) { 356 if (PHY_READ(phy, 0x0019) & 0x01) 357 mii->mii_media_active |= IFM_100_TX; 358 else 359 mii->mii_media_active |= IFM_10_T; 360 } else { 361 if (PHY_READ(phy, RL_MEDIASTAT) & 362 RL_MEDIASTAT_SPEED10) 363 mii->mii_media_active |= IFM_10_T; 364 else 365 mii->mii_media_active |= IFM_100_TX; 366 } 367 368 } else 369 mii->mii_media_active = mii_media_from_bmcr(bmcr); 370} 371