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/atphy.c
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1 /*- 2 * Copyright (c) 2008, Pyun YongHyeon <yongari@FreeBSD.org> 3 * 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 unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD: releng/8.2/sys/dev/mii/atphy.c 215882 2010-11-26 20:45:49Z marius $"); 30 31 /* 32 * Driver for the Attansic/Atheros F1 10/100/1000 PHY. 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/module.h> 39 #include <sys/socket.h> 40 #include <sys/bus.h> 41 42 #include <net/if.h> 43 #include <net/if_media.h> 44 45 #include <dev/mii/mii.h> 46 #include <dev/mii/miivar.h> 47 #include "miidevs.h" 48 49 #include <dev/mii/atphyreg.h> 50 51 #include "miibus_if.h" 52 53 static int atphy_probe(device_t); 54 static int atphy_attach(device_t); 55 56 struct atphy_softc { 57 struct mii_softc mii_sc; 58 int mii_oui; 59 int mii_model; 60 int mii_rev; 61 }; 62 63 static device_method_t atphy_methods[] = { 64 /* Device interface. */ 65 DEVMETHOD(device_probe, atphy_probe), 66 DEVMETHOD(device_attach, atphy_attach), 67 DEVMETHOD(device_detach, mii_phy_detach), 68 DEVMETHOD(device_shutdown, bus_generic_shutdown), 69 { NULL, NULL } 70 }; 71 72 static devclass_t atphy_devclass; 73 static driver_t atphy_driver = { 74 "atphy", 75 atphy_methods, 76 sizeof(struct atphy_softc) 77 }; 78 79 DRIVER_MODULE(atphy, miibus, atphy_driver, atphy_devclass, 0, 0); 80 81 static int atphy_service(struct mii_softc *, struct mii_data *, int); 82 static void atphy_status(struct mii_softc *); 83 static void atphy_reset(struct mii_softc *); 84 static uint16_t atphy_anar(struct ifmedia_entry *); 85 static int atphy_setmedia(struct mii_softc *, int); 86 87 static const struct mii_phydesc atphys[] = { 88 MII_PHY_DESC(ATHEROS, F1), 89 MII_PHY_DESC(ATHEROS, F1_7), 90 MII_PHY_DESC(ATHEROS, F2), 91 MII_PHY_END 92 }; 93 94 static int 95 atphy_probe(device_t dev) 96 { 97 98 return (mii_phy_dev_probe(dev, atphys, BUS_PROBE_DEFAULT)); 99 } 100 101 static int 102 atphy_attach(device_t dev) 103 { 104 struct atphy_softc *asc; 105 struct mii_softc *sc; 106 struct mii_attach_args *ma; 107 struct mii_data *mii; 108 109 asc = device_get_softc(dev); 110 sc = &asc->mii_sc; 111 ma = device_get_ivars(dev); 112 sc->mii_dev = device_get_parent(dev); 113 mii = ma->mii_data; 114 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 115 116 sc->mii_flags = miibus_get_flags(dev); 117 sc->mii_inst = mii->mii_instance++; 118 sc->mii_phy = ma->mii_phyno; 119 sc->mii_service = atphy_service; 120 sc->mii_pdata = mii; 121 122 asc->mii_oui = MII_OUI(ma->mii_id1, ma->mii_id2); 123 asc->mii_model = MII_MODEL(ma->mii_id2); 124 asc->mii_rev = MII_REV(ma->mii_id2); 125 if (bootverbose) 126 device_printf(dev, "OUI 0x%06x, model 0x%04x, rev. %d\n", 127 asc->mii_oui, asc->mii_model, asc->mii_rev); 128 129 atphy_reset(sc); 130 131 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 132 if (sc->mii_capabilities & BMSR_EXTSTAT) 133 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR); 134 device_printf(dev, " "); 135 mii_phy_add_media(sc); 136 printf("\n"); 137 138 MIIBUS_MEDIAINIT(sc->mii_dev); 139 return (0); 140 } 141 142 static int 143 atphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 144 { 145 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 146 uint16_t anar, bmcr, bmsr; 147 148 switch (cmd) { 149 case MII_POLLSTAT: 150 break; 151 152 case MII_MEDIACHG: 153 /* 154 * If the interface is not up, don't do anything. 155 */ 156 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 157 break; 158 159 if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO || 160 IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T) { 161 atphy_setmedia(sc, ife->ifm_media); 162 break; 163 } 164 165 bmcr = 0; 166 switch (IFM_SUBTYPE(ife->ifm_media)) { 167 case IFM_100_TX: 168 bmcr = BMCR_S100; 169 break; 170 case IFM_10_T: 171 bmcr = BMCR_S10; 172 break; 173 case IFM_NONE: 174 bmcr = PHY_READ(sc, MII_BMCR); 175 /* 176 * XXX 177 * Due to an unknown reason powering down PHY resulted 178 * in unexpected results such as inaccessibility of 179 * hardware of freshly rebooted system. Disable 180 * powering down PHY until I got more information for 181 * Attansic/Atheros PHY hardwares. 182 */ 183 PHY_WRITE(sc, MII_BMCR, bmcr | BMCR_ISO); 184 goto done; 185 default: 186 return (EINVAL); 187 } 188 189 anar = atphy_anar(ife); 190 if (((ife->ifm_media & IFM_GMASK) & IFM_FDX) != 0) { 191 bmcr |= BMCR_FDX; 192 if (((ife->ifm_media & IFM_GMASK) & IFM_FLOW) != 0 || 193 (sc->mii_flags & MIIF_FORCEPAUSE) != 0) 194 anar |= ANAR_PAUSE_TOWARDS; 195 } 196 197 if ((sc->mii_extcapabilities & (EXTSR_1000TFDX | 198 EXTSR_1000THDX)) != 0) 199 PHY_WRITE(sc, MII_100T2CR, 0); 200 PHY_WRITE(sc, MII_ANAR, anar | ANAR_CSMA); 201 202 /* 203 * Reset the PHY so all changes take effect. 204 */ 205 PHY_WRITE(sc, MII_BMCR, bmcr | BMCR_RESET | BMCR_AUTOEN | 206 BMCR_STARTNEG); 207 done: 208 break; 209 210 case MII_TICK: 211 /* 212 * Is the interface even up? 213 */ 214 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 215 return (0); 216 217 /* 218 * Only used for autonegotiation. 219 */ 220 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 221 sc->mii_ticks = 0; 222 break; 223 } 224 225 /* 226 * Check for link. 227 * Read the status register twice; BMSR_LINK is latch-low. 228 */ 229 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 230 if (bmsr & BMSR_LINK) { 231 sc->mii_ticks = 0; 232 break; 233 } 234 235 /* Announce link loss right after it happens. */ 236 if (sc->mii_ticks++ == 0) 237 break; 238 if (sc->mii_ticks <= sc->mii_anegticks) 239 return (0); 240 241 sc->mii_ticks = 0; 242 atphy_setmedia(sc, ife->ifm_media); 243 break; 244 } 245 246 /* Update the media status. */ 247 atphy_status(sc); 248 249 /* Callback if something changed. */ 250 mii_phy_update(sc, cmd); 251 return (0); 252 } 253 254 static void 255 atphy_status(struct mii_softc *sc) 256 { 257 struct mii_data *mii = sc->mii_pdata; 258 uint32_t bmsr, bmcr, ssr; 259 260 mii->mii_media_status = IFM_AVALID; 261 mii->mii_media_active = IFM_ETHER; 262 263 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 264 if ((bmsr & BMSR_LINK) != 0) 265 mii->mii_media_status |= IFM_ACTIVE; 266 267 bmcr = PHY_READ(sc, MII_BMCR); 268 if ((bmcr & BMCR_ISO) != 0) { 269 mii->mii_media_active |= IFM_NONE; 270 mii->mii_media_status = 0; 271 return; 272 } 273 274 if ((bmcr & BMCR_LOOP) != 0) 275 mii->mii_media_active |= IFM_LOOP; 276 277 ssr = PHY_READ(sc, ATPHY_SSR); 278 if ((ssr & ATPHY_SSR_SPD_DPLX_RESOLVED) == 0) { 279 /* Erg, still trying, I guess... */ 280 mii->mii_media_active |= IFM_NONE; 281 return; 282 } 283 284 switch (ssr & ATPHY_SSR_SPEED_MASK) { 285 case ATPHY_SSR_1000MBS: 286 mii->mii_media_active |= IFM_1000_T; 287 /* 288 * atphy(4) has a valid link so reset mii_ticks. 289 * Resetting mii_ticks is needed in order to 290 * detect link loss after auto-negotiation. 291 */ 292 sc->mii_ticks = 0; 293 break; 294 case ATPHY_SSR_100MBS: 295 mii->mii_media_active |= IFM_100_TX; 296 sc->mii_ticks = 0; 297 break; 298 case ATPHY_SSR_10MBS: 299 mii->mii_media_active |= IFM_10_T; 300 sc->mii_ticks = 0; 301 break; 302 default: 303 mii->mii_media_active |= IFM_NONE; 304 return; 305 } 306 307 if ((ssr & ATPHY_SSR_DUPLEX) != 0) 308 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); 309 else 310 mii->mii_media_active |= IFM_HDX; 311 312 if ((IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T) && 313 (PHY_READ(sc, MII_100T2SR) & GTSR_MS_RES) != 0) 314 mii->mii_media_active |= IFM_ETH_MASTER; 315 } 316 317 static void 318 atphy_reset(struct mii_softc *sc) 319 { 320 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 321 struct atphy_softc *asc; 322 uint32_t reg; 323 int i; 324 325 asc = (struct atphy_softc *)sc; 326 327 /* Take PHY out of power down mode. */ 328 PHY_WRITE(sc, 29, 0x29); 329 PHY_WRITE(sc, 30, 0); 330 331 reg = PHY_READ(sc, ATPHY_SCR); 332 /* Enable automatic crossover. */ 333 reg |= ATPHY_SCR_AUTO_X_MODE; 334 /* Disable power down. */ 335 reg &= ~ATPHY_SCR_MAC_PDOWN; 336 /* Enable CRS on Tx. */ 337 reg |= ATPHY_SCR_ASSERT_CRS_ON_TX; 338 /* Auto correction for reversed cable polarity. */ 339 reg |= ATPHY_SCR_POLARITY_REVERSAL; 340 PHY_WRITE(sc, ATPHY_SCR, reg); 341 342 /* Workaround F1 bug to reset phy. */ 343 atphy_setmedia(sc, ife == NULL ? IFM_AUTO : ife->ifm_media); 344 345 for (i = 0; i < 1000; i++) { 346 DELAY(1); 347 if ((PHY_READ(sc, MII_BMCR) & BMCR_RESET) == 0) 348 break; 349 } 350 } 351 352 static uint16_t 353 atphy_anar(struct ifmedia_entry *ife) 354 { 355 uint16_t anar; 356 357 anar = 0; 358 switch (IFM_SUBTYPE(ife->ifm_media)) { 359 case IFM_AUTO: 360 anar |= ANAR_TX_FD | ANAR_TX | ANAR_10_FD | ANAR_10; 361 return (anar); 362 case IFM_1000_T: 363 return (anar); 364 case IFM_100_TX: 365 anar |= ANAR_TX; 366 break; 367 case IFM_10_T: 368 anar |= ANAR_10; 369 break; 370 default: 371 return (0); 372 } 373 374 if (((ife->ifm_media & IFM_GMASK) & IFM_FDX) != 0) { 375 if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_TX) 376 anar |= ANAR_TX_FD; 377 else 378 anar |= ANAR_10_FD; 379 } 380 381 return (anar); 382 } 383 384 static int 385 atphy_setmedia(struct mii_softc *sc, int media) 386 { 387 uint16_t anar; 388 389 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA; 390 if (((IFM_SUBTYPE(media) == IFM_AUTO || 391 ((media & IFM_GMASK) & IFM_FDX) != 0) && 392 ((media & IFM_GMASK) & IFM_FLOW) != 0) || 393 (sc->mii_flags & MIIF_FORCEPAUSE) != 0) 394 anar |= ANAR_PAUSE_TOWARDS; 395 PHY_WRITE(sc, MII_ANAR, anar); 396 if ((sc->mii_extcapabilities & (EXTSR_1000TFDX | EXTSR_1000THDX)) != 0) 397 PHY_WRITE(sc, MII_100T2CR, GTCR_ADV_1000TFDX | 398 GTCR_ADV_1000THDX); 399 PHY_WRITE(sc, MII_BMCR, BMCR_RESET | BMCR_AUTOEN | BMCR_STARTNEG); 400 401 return (EJUSTRETURN); 402 }
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