1 /*- 2 * Copyright (c) 1997, 1998, 1999 3 * Bill Paul <wpaul@ee.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 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 /* 37 * Pseudo-driver for internal NWAY support on DEC 21143 and workalike 38 * controllers. Technically we're abusing the miibus code to handle 39 * media selection and NWAY support here since there is no MII 40 * interface. However the logical operations are roughly the same, 41 * and the alternative is to create a fake MII interface in the driver, 42 * which is harder to do. 43 */ 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/socket.h> 49 #include <sys/errno.h> 50 #include <sys/lock.h> 51 #include <sys/module.h> 52 #include <sys/mutex.h> 53 #include <sys/bus.h> 54 55 #include <net/if.h> 56 #include <net/if_arp.h> 57 #include <net/if_media.h> 58 59 #include <dev/mii/mii.h> 60 #include <dev/mii/miivar.h> 61 #include "miidevs.h" 62 63 #include <machine/bus.h> 64 #include <machine/resource.h> 65 #include <sys/bus.h> 66 67 #include <dev/pci/pcivar.h> 68 69 #include <pci/if_dcreg.h> 70 71 #include "miibus_if.h" 72 73 #define DC_SETBIT(sc, reg, x) \ 74 CSR_WRITE_4(sc, reg, \ 75 CSR_READ_4(sc, reg) | x) 76 77 #define DC_CLRBIT(sc, reg, x) \ 78 CSR_WRITE_4(sc, reg, \ 79 CSR_READ_4(sc, reg) & ~x) 80 81 #define MIIF_AUTOTIMEOUT 0x0004 82 83 /* 84 * This is the subsystem ID for the built-in 21143 ethernet 85 * in several Compaq Presario systems. Apparently these are 86 * 10Mbps only, so we need to treat them specially. 87 */ 88 #define COMPAQ_PRESARIO_ID 0xb0bb0e11 89 90 static int dcphy_probe(device_t); 91 static int dcphy_attach(device_t); 92 93 static device_method_t dcphy_methods[] = { 94 /* device interface */ 95 DEVMETHOD(device_probe, dcphy_probe), 96 DEVMETHOD(device_attach, dcphy_attach), 97 DEVMETHOD(device_detach, mii_phy_detach), 98 DEVMETHOD(device_shutdown, bus_generic_shutdown), 99 { 0, 0 } 100 }; 101 102 static devclass_t dcphy_devclass; 103 104 static driver_t dcphy_driver = { 105 "dcphy", 106 dcphy_methods, 107 sizeof(struct mii_softc) 108 }; 109 110 DRIVER_MODULE(dcphy, miibus, dcphy_driver, dcphy_devclass, 0, 0); 111 112 static int dcphy_service(struct mii_softc *, struct mii_data *, int); 113 static void dcphy_status(struct mii_softc *); 114 static void dcphy_reset(struct mii_softc *); 115 static int dcphy_auto(struct mii_softc *); 116 117 static int 118 dcphy_probe(dev) 119 device_t dev; 120 { 121 struct mii_attach_args *ma; 122 123 ma = device_get_ivars(dev); 124 125 /* 126 * The dc driver will report the 21143 vendor and device 127 * ID to let us know that it wants us to attach. 128 */ 129 if (ma->mii_id1 != DC_VENDORID_DEC || 130 ma->mii_id2 != DC_DEVICEID_21143) 131 return(ENXIO); 132 133 device_set_desc(dev, "Intel 21143 NWAY media interface"); 134 135 return (0); 136 } 137 138 static int 139 dcphy_attach(dev) 140 device_t dev; 141 { 142 struct mii_softc *sc; 143 struct mii_attach_args *ma; 144 struct mii_data *mii; 145 struct dc_softc *dc_sc; 146 147 sc = device_get_softc(dev); 148 ma = device_get_ivars(dev); 149 sc->mii_dev = device_get_parent(dev); 150 mii = device_get_softc(sc->mii_dev); 151 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 152 153 sc->mii_inst = mii->mii_instance; 154 sc->mii_phy = ma->mii_phyno; 155 sc->mii_service = dcphy_service; 156 sc->mii_pdata = mii; 157 158 sc->mii_flags |= MIIF_NOISOLATE; 159 mii->mii_instance++; 160 161 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 162 163 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 164 BMCR_ISO); 165 166 /*dcphy_reset(sc);*/ 167 dc_sc = mii->mii_ifp->if_softc; 168 CSR_WRITE_4(dc_sc, DC_10BTSTAT, 0); 169 CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0); 170 171 switch(pci_read_config(device_get_parent(sc->mii_dev), 172 DC_PCI_CSID, 4)) { 173 case COMPAQ_PRESARIO_ID: 174 /* Example of how to only allow 10Mbps modes. */ 175 sc->mii_capabilities = BMSR_ANEG|BMSR_10TFDX|BMSR_10THDX; 176 break; 177 default: 178 if (dc_sc->dc_pmode == DC_PMODE_SIA) { 179 sc->mii_capabilities = 180 BMSR_ANEG|BMSR_10TFDX|BMSR_10THDX; 181 } else { 182 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, 183 sc->mii_inst), BMCR_LOOP|BMCR_S100); 184 185 sc->mii_capabilities = 186 BMSR_ANEG|BMSR_100TXFDX|BMSR_100TXHDX| 187 BMSR_10TFDX|BMSR_10THDX; 188 } 189 break; 190 } 191 192 sc->mii_capabilities &= ma->mii_capmask; 193 device_printf(dev, " "); 194 mii_add_media(sc); 195 printf("\n"); 196 #undef ADD 197 198 MIIBUS_MEDIAINIT(sc->mii_dev); 199 return(0); 200 } 201 202 static int 203 dcphy_service(sc, mii, cmd) 204 struct mii_softc *sc; 205 struct mii_data *mii; 206 int cmd; 207 { 208 struct dc_softc *dc_sc; 209 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 210 int reg; 211 u_int32_t mode; 212 213 dc_sc = mii->mii_ifp->if_softc; 214 215 switch (cmd) { 216 case MII_POLLSTAT: 217 /* 218 * If we're not polling our PHY instance, just return. 219 */ 220 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 221 return (0); 222 } 223 break; 224 225 case MII_MEDIACHG: 226 /* 227 * If the media indicates a different PHY instance, 228 * isolate ourselves. 229 */ 230 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 231 return (0); 232 } 233 234 /* 235 * If the interface is not up, don't do anything. 236 */ 237 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 238 break; 239 240 sc->mii_flags = 0; 241 mii->mii_media_active = IFM_NONE; 242 mode = CSR_READ_4(dc_sc, DC_NETCFG); 243 mode &= ~(DC_NETCFG_FULLDUPLEX|DC_NETCFG_PORTSEL| 244 DC_NETCFG_PCS|DC_NETCFG_SCRAMBLER|DC_NETCFG_SPEEDSEL); 245 246 switch (IFM_SUBTYPE(ife->ifm_media)) { 247 case IFM_AUTO: 248 /*dcphy_reset(sc);*/ 249 (void) dcphy_auto(sc); 250 break; 251 case IFM_100_T4: 252 /* 253 * XXX Not supported as a manual setting right now. 254 */ 255 return (EINVAL); 256 case IFM_100_TX: 257 dcphy_reset(sc); 258 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 259 mode |= DC_NETCFG_PORTSEL|DC_NETCFG_PCS| 260 DC_NETCFG_SCRAMBLER; 261 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) 262 mode |= DC_NETCFG_FULLDUPLEX; 263 else 264 mode &= ~DC_NETCFG_FULLDUPLEX; 265 CSR_WRITE_4(dc_sc, DC_NETCFG, mode); 266 break; 267 case IFM_10_T: 268 DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 269 DC_CLRBIT(dc_sc, DC_10BTCTRL, 0xFFFF); 270 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) 271 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3D); 272 else 273 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3F); 274 DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 275 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 276 mode &= ~DC_NETCFG_PORTSEL; 277 mode |= DC_NETCFG_SPEEDSEL; 278 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) 279 mode |= DC_NETCFG_FULLDUPLEX; 280 else 281 mode &= ~DC_NETCFG_FULLDUPLEX; 282 CSR_WRITE_4(dc_sc, DC_NETCFG, mode); 283 break; 284 default: 285 return(EINVAL); 286 } 287 break; 288 289 case MII_TICK: 290 /* 291 * If we're not currently selected, just return. 292 */ 293 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 294 return (0); 295 296 /* 297 * Is the interface even up? 298 */ 299 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 300 return (0); 301 302 /* 303 * Only used for autonegotiation. 304 */ 305 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 306 break; 307 308 reg = CSR_READ_4(dc_sc, DC_10BTSTAT); 309 if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100)) 310 break; 311 312 /* 313 * Only retry autonegotiation every 5 seconds. 314 * 315 * Otherwise, fall through to calling dcphy_status() 316 * since real Intel 21143 chips don't show valid link 317 * status until autonegotiation is switched off, and 318 * that only happens in dcphy_status(). Without this, 319 * successful autonegotiation is never recognised on 320 * these chips. 321 */ 322 if (++sc->mii_ticks <= 50) 323 break; 324 325 sc->mii_ticks = 0; 326 dcphy_auto(sc); 327 328 break; 329 } 330 331 /* Update the media status. */ 332 dcphy_status(sc); 333 334 /* Callback if something changed. */ 335 mii_phy_update(sc, cmd); 336 return (0); 337 } 338 339 static void 340 dcphy_status(sc) 341 struct mii_softc *sc; 342 { 343 struct mii_data *mii = sc->mii_pdata; 344 int reg, anlpar, tstat = 0; 345 struct dc_softc *dc_sc; 346 347 dc_sc = mii->mii_ifp->if_softc; 348 349 mii->mii_media_status = IFM_AVALID; 350 mii->mii_media_active = IFM_ETHER; 351 352 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 353 return; 354 355 reg = CSR_READ_4(dc_sc, DC_10BTSTAT); 356 if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100)) 357 mii->mii_media_status |= IFM_ACTIVE; 358 359 if (CSR_READ_4(dc_sc, DC_10BTCTRL) & DC_TCTL_AUTONEGENBL) { 360 /* Erg, still trying, I guess... */ 361 tstat = CSR_READ_4(dc_sc, DC_10BTSTAT); 362 if ((tstat & DC_TSTAT_ANEGSTAT) != DC_ASTAT_AUTONEGCMP) { 363 if ((DC_IS_MACRONIX(dc_sc) || DC_IS_PNICII(dc_sc)) && 364 (tstat & DC_TSTAT_ANEGSTAT) == DC_ASTAT_DISABLE) 365 goto skip; 366 mii->mii_media_active |= IFM_NONE; 367 return; 368 } 369 370 if (tstat & DC_TSTAT_LP_CAN_NWAY) { 371 anlpar = tstat >> 16; 372 if (anlpar & ANLPAR_T4 && 373 sc->mii_capabilities & BMSR_100TXHDX) 374 mii->mii_media_active |= IFM_100_T4; 375 else if (anlpar & ANLPAR_TX_FD && 376 sc->mii_capabilities & BMSR_100TXFDX) 377 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 378 else if (anlpar & ANLPAR_TX && 379 sc->mii_capabilities & BMSR_100TXHDX) 380 mii->mii_media_active |= IFM_100_TX; 381 else if (anlpar & ANLPAR_10_FD) 382 mii->mii_media_active |= IFM_10_T|IFM_FDX; 383 else if (anlpar & ANLPAR_10) 384 mii->mii_media_active |= IFM_10_T; 385 else 386 mii->mii_media_active |= IFM_NONE; 387 if (DC_IS_INTEL(dc_sc)) 388 DC_CLRBIT(dc_sc, DC_10BTCTRL, 389 DC_TCTL_AUTONEGENBL); 390 return; 391 } 392 /* 393 * If the other side doesn't support NWAY, then the 394 * best we can do is determine if we have a 10Mbps or 395 * 100Mbps link. There's no way to know if the link 396 * is full or half duplex, so we default to half duplex 397 * and hope that the user is clever enough to manually 398 * change the media settings if we're wrong. 399 */ 400 if (!(reg & DC_TSTAT_LS100)) 401 mii->mii_media_active |= IFM_100_TX; 402 else if (!(reg & DC_TSTAT_LS10)) 403 mii->mii_media_active |= IFM_10_T; 404 else 405 mii->mii_media_active |= IFM_NONE; 406 if (DC_IS_INTEL(dc_sc)) 407 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 408 return; 409 } 410 411 skip: 412 413 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL) 414 mii->mii_media_active |= IFM_10_T; 415 else 416 mii->mii_media_active |= IFM_100_TX; 417 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX) 418 mii->mii_media_active |= IFM_FDX; 419 420 return; 421 } 422 423 static int 424 dcphy_auto(mii) 425 struct mii_softc *mii; 426 { 427 struct dc_softc *sc; 428 429 sc = mii->mii_pdata->mii_ifp->if_softc; 430 431 DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL); 432 DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_FULLDUPLEX); 433 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET); 434 if (mii->mii_capabilities & BMSR_100TXHDX) 435 CSR_WRITE_4(sc, DC_10BTCTRL, 0x3FFFF); 436 else 437 CSR_WRITE_4(sc, DC_10BTCTRL, 0xFFFF); 438 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET); 439 DC_SETBIT(sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 440 DC_SETBIT(sc, DC_10BTSTAT, DC_ASTAT_TXDISABLE); 441 442 return(EJUSTRETURN); 443 } 444 445 static void 446 dcphy_reset(mii) 447 struct mii_softc *mii; 448 { 449 struct dc_softc *sc; 450 451 sc = mii->mii_pdata->mii_ifp->if_softc; 452 453 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET); 454 DELAY(1000); 455 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET); 456 457 return; 458 } 459 460