dcphy.c revision 1.14
1/* $OpenBSD: dcphy.c,v 1.14 2005/03/26 04:40:09 krw Exp $ */ 2 3/* 4 * Copyright (c) 1997, 1998, 1999 5 * Bill Paul <wpaul@ee.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/dcphy.c,v 1.6 2000/10/05 17:36:14 wpaul Exp $ 35 */ 36 37/* 38 * Pseudo-driver for internal NWAY support on DEC 21143 and workalike 39 * controllers. Technically we're abusing the miibus code to handle 40 * media selection and NWAY support here since there is no MII 41 * interface. However the logical operations are roughly the same, 42 * and the alternative is to create a fake MII interface in the driver, 43 * which is harder to do. 44 */ 45 46#include <sys/param.h> 47#include <sys/device.h> 48#include <sys/systm.h> 49#include <sys/kernel.h> 50#include <sys/socket.h> 51#include <sys/errno.h> 52#include <sys/socket.h> 53 54#include <net/if.h> 55#include <net/if_dl.h> 56#include <net/if_types.h> 57#include <net/if_media.h> 58#include <netinet/in.h> 59#include <netinet/if_ether.h> 60 61#include <dev/mii/mii.h> 62#include <dev/mii/miivar.h> 63#include <dev/mii/miidevs.h> 64 65#include <machine/bus.h> 66 67#include <dev/pci/pcivar.h> 68 69#include <dev/ic/dcreg.h> 70 71#define DC_SETBIT(sc, reg, x) \ 72 CSR_WRITE_4(sc, reg, \ 73 CSR_READ_4(sc, reg) | x) 74 75#define DC_CLRBIT(sc, reg, x) \ 76 CSR_WRITE_4(sc, reg, \ 77 CSR_READ_4(sc, reg) & ~x) 78 79#define MIIF_AUTOTIMEOUT 0x0004 80 81/* 82 * This is the subsystem ID for the built-in 21143 ethernet 83 * in several Compaq Presario systems. Apparently these are 84 * 10Mbps only, so we need to treat them specially. 85 */ 86#define COMPAQ_PRESARIO_ID 0xb0bb0e11 87 88int dcphy_match(struct device *, void *, void *); 89void dcphy_attach(struct device *, struct device *, void *); 90 91struct cfattach dcphy_ca = { 92 sizeof(struct mii_softc), dcphy_match, dcphy_attach, mii_phy_detach, 93 mii_phy_activate 94}; 95 96struct cfdriver dcphy_cd = { 97 NULL, "dcphy", DV_DULL 98}; 99 100int dcphy_service(struct mii_softc *, struct mii_data *, int); 101void dcphy_status(struct mii_softc *); 102int dcphy_mii_phy_auto(struct mii_softc *, int); 103void dcphy_reset(struct mii_softc *); 104 105const struct mii_phy_funcs dcphy_funcs = { 106 dcphy_service, dcphy_status, dcphy_reset, 107}; 108 109int 110dcphy_match(struct device *parent, void *match, void *aux) 111{ 112 struct mii_attach_args *ma = aux; 113 114 /* 115 * The dc driver will report the 21143 vendor and device 116 * ID to let us know that it wants us to attach. 117 */ 118 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxDEC && 119 MII_MODEL(ma->mii_id2) == MII_MODEL_xxDEC_xxDC) 120 return (10); 121 122 return (0); 123} 124 125void 126dcphy_attach(struct device *parent, struct device *self, void *aux) 127{ 128 struct mii_softc *sc = (struct mii_softc *)self; 129 struct mii_attach_args *ma = aux; 130 struct mii_data *mii = ma->mii_data; 131 struct dc_softc *dc_sc; 132 133 printf(": internal PHY\n"); 134 sc->mii_inst = mii->mii_instance; 135 sc->mii_phy = ma->mii_phyno; 136 sc->mii_funcs = &dcphy_funcs; 137 sc->mii_pdata = mii; 138 sc->mii_flags = ma->mii_flags; 139 sc->mii_anegticks = 50; 140 141 sc->mii_flags |= MIIF_NOISOLATE; 142 143 mii->mii_instance++; 144 145 dc_sc = mii->mii_ifp->if_softc; 146 CSR_WRITE_4(dc_sc, DC_10BTSTAT, 0); 147 CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0); 148 149#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 150 151 switch(dc_sc->dc_csid) { 152 case COMPAQ_PRESARIO_ID: 153 /* Example of how to only allow 10Mbps modes. */ 154 sc->mii_capabilities = BMSR_ANEG|BMSR_10TFDX|BMSR_10THDX; 155 break; 156 default: 157 if (dc_sc->dc_pmode == DC_PMODE_SIA) { 158 sc->mii_capabilities = 159 BMSR_ANEG|BMSR_10TFDX|BMSR_10THDX; 160 } else { 161 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, 162 sc->mii_inst), BMCR_LOOP|BMCR_S100); 163 164 sc->mii_capabilities = 165 BMSR_ANEG|BMSR_100TXFDX|BMSR_100TXHDX| 166 BMSR_10TFDX|BMSR_10THDX; 167 } 168 break; 169 } 170 171 if (dc_sc->dc_type == DC_TYPE_21145) 172 sc->mii_capabilities = BMSR_10THDX; 173 174 sc->mii_capabilities &= ma->mii_capmask; 175 if (sc->mii_capabilities & BMSR_MEDIAMASK) 176 mii_phy_add_media(sc); 177#undef ADD 178} 179 180int 181dcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 182{ 183 struct dc_softc *dc_sc; 184 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 185 int reg; 186 u_int32_t mode; 187 188 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0) 189 return (ENXIO); 190 191 dc_sc = mii->mii_ifp->if_softc; 192 193 switch (cmd) { 194 case MII_POLLSTAT: 195 /* 196 * If we're not polling our PHY instance, just return. 197 */ 198 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 199 return (0); 200 } 201 break; 202 203 case MII_MEDIACHG: 204 /* 205 * If the media indicates a different PHY instance, 206 * isolate ourselves. 207 */ 208 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 209 return (0); 210 } 211 212 /* 213 * If the interface is not up, don't do anything. 214 */ 215 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 216 break; 217 218 sc->mii_flags = 0; 219 mii->mii_media_active = IFM_NONE; 220 mode = CSR_READ_4(dc_sc, DC_NETCFG); 221 mode &= ~(DC_NETCFG_FULLDUPLEX|DC_NETCFG_PORTSEL| 222 DC_NETCFG_PCS|DC_NETCFG_SCRAMBLER|DC_NETCFG_SPEEDSEL); 223 224 switch (IFM_SUBTYPE(ife->ifm_media)) { 225 case IFM_AUTO: 226 /*PHY_RESET(sc);*/ 227 sc->mii_flags &= ~MIIF_DOINGAUTO; 228 (void) dcphy_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 case IFM_100_TX: 236 PHY_RESET(sc); 237 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 238 mode |= DC_NETCFG_PORTSEL|DC_NETCFG_PCS| 239 DC_NETCFG_SCRAMBLER; 240 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) 241 mode |= DC_NETCFG_FULLDUPLEX; 242 else 243 mode &= ~DC_NETCFG_FULLDUPLEX; 244 CSR_WRITE_4(dc_sc, DC_NETCFG, mode); 245 break; 246 case IFM_10_T: 247 DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 248 DC_CLRBIT(dc_sc, DC_10BTCTRL, 0xFFFF); 249 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) 250 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3D); 251 else 252 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3F); 253 DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 254 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 255 mode &= ~DC_NETCFG_PORTSEL; 256 mode |= DC_NETCFG_SPEEDSEL; 257 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) 258 mode |= DC_NETCFG_FULLDUPLEX; 259 else 260 mode &= ~DC_NETCFG_FULLDUPLEX; 261 CSR_WRITE_4(dc_sc, DC_NETCFG, mode); 262 break; 263 default: 264 return(EINVAL); 265 } 266 break; 267 268 case MII_TICK: 269 /* 270 * If we're not currently selected, just return. 271 */ 272 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 273 return (0); 274 275 /* 276 * Is the interface even up? 277 */ 278 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 279 return (0); 280 281 /* 282 * Only used for autonegotiation. 283 */ 284 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 285 break; 286 287 reg = CSR_READ_4(dc_sc, DC_10BTSTAT); 288 if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100)) 289 break; 290 291 /* 292 * Only retry autonegotiation every mii_anegticks seconds. 293 * 294 * Otherwise, fall through to calling dcphy_status() 295 * since real Intel 21143 chips don't show valid link 296 * status until autonegotiation is switched off, and 297 * that only happens in dcphy_status(). Without this, 298 * successful autonegotation is never recognised on 299 * these chips. 300 */ 301 if (++sc->mii_ticks <= sc->mii_anegticks) 302 break; 303 304 sc->mii_ticks = 0; 305 sc->mii_flags &= ~MIIF_DOINGAUTO; 306 dcphy_mii_phy_auto(sc, 0); 307 308 break; 309 } 310 311 /* Update the media status. */ 312 mii_phy_status(sc); 313 314 /* Callback if something changed. */ 315 mii_phy_update(sc, cmd); 316 return (0); 317} 318 319void 320dcphy_status(struct mii_softc *sc) 321{ 322 struct mii_data *mii = sc->mii_pdata; 323 int reg, anlpar, tstat = 0; 324 struct dc_softc *dc_sc; 325 326 dc_sc = mii->mii_ifp->if_softc; 327 328 mii->mii_media_status = IFM_AVALID; 329 mii->mii_media_active = IFM_ETHER; 330 331 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 332 return; 333 334 reg = CSR_READ_4(dc_sc, DC_10BTSTAT); 335 if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100)) 336 mii->mii_media_status |= IFM_ACTIVE; 337 338 if (CSR_READ_4(dc_sc, DC_10BTCTRL) & DC_TCTL_AUTONEGENBL) { 339 /* Erg, still trying, I guess... */ 340 tstat = CSR_READ_4(dc_sc, DC_10BTSTAT); 341 if ((tstat & DC_TSTAT_ANEGSTAT) != DC_ASTAT_AUTONEGCMP) { 342 if ((DC_IS_MACRONIX(dc_sc) || DC_IS_PNICII(dc_sc)) && 343 (tstat & DC_TSTAT_ANEGSTAT) == DC_ASTAT_DISABLE) 344 goto skip; 345 mii->mii_media_active |= IFM_NONE; 346 return; 347 } 348 349 if (tstat & DC_TSTAT_LP_CAN_NWAY) { 350 anlpar = tstat >> 16; 351 if (anlpar & ANLPAR_T4 && 352 sc->mii_capabilities & BMSR_100TXHDX) 353 mii->mii_media_active |= IFM_100_T4; 354 else if (anlpar & ANLPAR_TX_FD && 355 sc->mii_capabilities & BMSR_100TXFDX) 356 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 357 else if (anlpar & ANLPAR_TX && 358 sc->mii_capabilities & BMSR_100TXHDX) 359 mii->mii_media_active |= IFM_100_TX; 360 else if (anlpar & ANLPAR_10_FD) 361 mii->mii_media_active |= IFM_10_T|IFM_FDX; 362 else if (anlpar & ANLPAR_10) 363 mii->mii_media_active |= IFM_10_T; 364 else 365 mii->mii_media_active |= IFM_NONE; 366 if (DC_IS_INTEL(dc_sc)) 367 DC_CLRBIT(dc_sc, DC_10BTCTRL, 368 DC_TCTL_AUTONEGENBL); 369 return; 370 } 371 /* 372 * If the other side doesn't support NWAY, then the 373 * best we can do is determine if we have a 10Mbps or 374 * 100Mbps link. There's no way to know if the link 375 * is full or half duplex, so we default to half duplex 376 * and hope that the user is clever enough to manually 377 * change the media settings if we're wrong. 378 */ 379 if (!(reg & DC_TSTAT_LS100)) 380 mii->mii_media_active |= IFM_100_TX; 381 else if (!(reg & DC_TSTAT_LS10)) 382 mii->mii_media_active |= IFM_10_T; 383 else 384 mii->mii_media_active |= IFM_NONE; 385 if (DC_IS_INTEL(dc_sc)) 386 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 387 return; 388 } 389 390skip: 391 392 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL) 393 mii->mii_media_active |= IFM_10_T; 394 else 395 mii->mii_media_active |= IFM_100_TX; 396 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX) 397 mii->mii_media_active |= IFM_FDX; 398 399 return; 400} 401 402int 403dcphy_mii_phy_auto(struct mii_softc *mii, int waitfor) 404{ 405 int i; 406 struct dc_softc *sc; 407 408 sc = mii->mii_pdata->mii_ifp->if_softc; 409 410 if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 411 DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL); 412 DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_FULLDUPLEX); 413 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET); 414 if (mii->mii_capabilities & BMSR_100TXHDX) 415 CSR_WRITE_4(sc, DC_10BTCTRL, 0x3FFFF); 416 else 417 CSR_WRITE_4(sc, DC_10BTCTRL, 0xFFFF); 418 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET); 419 DC_SETBIT(sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 420 DC_SETBIT(sc, DC_10BTSTAT, DC_ASTAT_TXDISABLE); 421 } 422 423 if (waitfor) { 424 /* Wait 500ms for it to complete. */ 425 for (i = 0; i < 500; i++) { 426 if ((CSR_READ_4(sc, DC_10BTSTAT) & DC_TSTAT_ANEGSTAT) 427 == DC_ASTAT_AUTONEGCMP) 428 return(0); 429 DELAY(1000); 430 } 431 /* 432 * Don't need to worry about clearing MIIF_DOINGAUTO. 433 * If that's set, a timeout is pending, and it will 434 * clear the flag. 435 */ 436 return(EIO); 437 } 438 439 /* 440 * Just let it finish asynchronously. This is for the benefit of 441 * the tick handler driving autonegotiation. Don't want 500ms 442 * delays all the time while the system is running! 443 */ 444 if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) 445 mii->mii_flags |= MIIF_DOINGAUTO; 446 447 return(EJUSTRETURN); 448} 449 450void 451dcphy_reset(struct mii_softc *mii) 452{ 453 struct dc_softc *sc; 454 455 sc = mii->mii_pdata->mii_ifp->if_softc; 456 457 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET); 458 DELAY(1000); 459 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET); 460 461 return; 462} 463