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 <dev/dc/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(device_t dev) 119 { 120 struct mii_attach_args *ma; 121 122 ma = device_get_ivars(dev); 123 124 /* 125 * The dc driver will report the 21143 vendor and device 126 * ID to let us know that it wants us to attach. 127 */ 128 if (ma->mii_id1 != DC_VENDORID_DEC || 129 ma->mii_id2 != DC_DEVICEID_21143) 130 return(ENXIO); 131 132 device_set_desc(dev, "Intel 21143 NWAY media interface"); 133 134 return (0); 135 } 136 137 static int 138 dcphy_attach(device_t dev) 139 { 140 struct mii_softc *sc; 141 struct mii_attach_args *ma; 142 struct mii_data *mii; 143 struct dc_softc *dc_sc; 144 145 sc = device_get_softc(dev); 146 ma = device_get_ivars(dev); 147 sc->mii_dev = device_get_parent(dev); 148 mii = device_get_softc(sc->mii_dev); 149 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 150 151 sc->mii_inst = mii->mii_instance; 152 sc->mii_phy = ma->mii_phyno; 153 sc->mii_service = dcphy_service; 154 sc->mii_pdata = mii; 155 156 sc->mii_flags |= MIIF_NOISOLATE; 157 mii->mii_instance++; 158 159 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 160 161 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 162 BMCR_ISO); 163 164 /*dcphy_reset(sc);*/ 165 dc_sc = mii->mii_ifp->if_softc; 166 CSR_WRITE_4(dc_sc, DC_10BTSTAT, 0); 167 CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0); 168 169 switch(pci_read_config(device_get_parent(sc->mii_dev), 170 DC_PCI_CSID, 4)) { 171 case COMPAQ_PRESARIO_ID: 172 /* Example of how to only allow 10Mbps modes. */ 173 sc->mii_capabilities = BMSR_ANEG|BMSR_10TFDX|BMSR_10THDX; 174 break; 175 default: 176 if (dc_sc->dc_pmode == DC_PMODE_SIA) { 177 sc->mii_capabilities = 178 BMSR_ANEG|BMSR_10TFDX|BMSR_10THDX; 179 } else { 180 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, 181 sc->mii_inst), BMCR_LOOP|BMCR_S100); 182 183 sc->mii_capabilities = 184 BMSR_ANEG|BMSR_100TXFDX|BMSR_100TXHDX| 185 BMSR_10TFDX|BMSR_10THDX; 186 } 187 break; 188 } 189 190 sc->mii_capabilities &= ma->mii_capmask; 191 device_printf(dev, " "); 192 mii_add_media(sc); 193 printf("\n"); 194 #undef ADD 195 196 MIIBUS_MEDIAINIT(sc->mii_dev); 197 return(0); 198 } 199 200 static int 201 dcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 202 { 203 struct dc_softc *dc_sc; 204 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 205 int reg; 206 u_int32_t mode; 207 208 dc_sc = mii->mii_ifp->if_softc; 209 210 switch (cmd) { 211 case MII_POLLSTAT: 212 /* 213 * If we're not polling our PHY instance, just return. 214 */ 215 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 216 return (0); 217 } 218 break; 219 220 case MII_MEDIACHG: 221 /* 222 * If the media indicates a different PHY instance, 223 * isolate ourselves. 224 */ 225 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 226 return (0); 227 } 228 229 /* 230 * If the interface is not up, don't do anything. 231 */ 232 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 233 break; 234 235 sc->mii_flags = 0; 236 mii->mii_media_active = IFM_NONE; 237 mode = CSR_READ_4(dc_sc, DC_NETCFG); 238 mode &= ~(DC_NETCFG_FULLDUPLEX|DC_NETCFG_PORTSEL| 239 DC_NETCFG_PCS|DC_NETCFG_SCRAMBLER|DC_NETCFG_SPEEDSEL); 240 241 switch (IFM_SUBTYPE(ife->ifm_media)) { 242 case IFM_AUTO: 243 /*dcphy_reset(sc);*/ 244 (void) dcphy_auto(sc); 245 break; 246 case IFM_100_T4: 247 /* 248 * XXX Not supported as a manual setting right now. 249 */ 250 return (EINVAL); 251 case IFM_100_TX: 252 dcphy_reset(sc); 253 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 254 mode |= DC_NETCFG_PORTSEL|DC_NETCFG_PCS| 255 DC_NETCFG_SCRAMBLER; 256 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) 257 mode |= DC_NETCFG_FULLDUPLEX; 258 else 259 mode &= ~DC_NETCFG_FULLDUPLEX; 260 CSR_WRITE_4(dc_sc, DC_NETCFG, mode); 261 break; 262 case IFM_10_T: 263 DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 264 DC_CLRBIT(dc_sc, DC_10BTCTRL, 0xFFFF); 265 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) 266 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3D); 267 else 268 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3F); 269 DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 270 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 271 mode &= ~DC_NETCFG_PORTSEL; 272 mode |= DC_NETCFG_SPEEDSEL; 273 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) 274 mode |= DC_NETCFG_FULLDUPLEX; 275 else 276 mode &= ~DC_NETCFG_FULLDUPLEX; 277 CSR_WRITE_4(dc_sc, DC_NETCFG, mode); 278 break; 279 default: 280 return(EINVAL); 281 } 282 break; 283 284 case MII_TICK: 285 /* 286 * If we're not currently selected, just return. 287 */ 288 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 289 return (0); 290 291 /* 292 * Is the interface even up? 293 */ 294 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 295 return (0); 296 297 /* 298 * Only used for autonegotiation. 299 */ 300 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 301 break; 302 303 reg = CSR_READ_4(dc_sc, DC_10BTSTAT); 304 if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100)) 305 break; 306 307 /* 308 * Only retry autonegotiation every 5 seconds. 309 * 310 * Otherwise, fall through to calling dcphy_status() 311 * since real Intel 21143 chips don't show valid link 312 * status until autonegotiation is switched off, and 313 * that only happens in dcphy_status(). Without this, 314 * successful autonegotiation is never recognised on 315 * these chips. 316 */ 317 if (++sc->mii_ticks <= 50) 318 break; 319 320 sc->mii_ticks = 0; 321 dcphy_auto(sc); 322 323 break; 324 } 325 326 /* Update the media status. */ 327 dcphy_status(sc); 328 329 /* Callback if something changed. */ 330 mii_phy_update(sc, cmd); 331 return (0); 332 } 333 334 static void 335 dcphy_status(struct mii_softc *sc) 336 { 337 struct mii_data *mii = sc->mii_pdata; 338 int reg, anlpar, tstat = 0; 339 struct dc_softc *dc_sc; 340 341 dc_sc = mii->mii_ifp->if_softc; 342 343 mii->mii_media_status = IFM_AVALID; 344 mii->mii_media_active = IFM_ETHER; 345 346 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 347 return; 348 349 reg = CSR_READ_4(dc_sc, DC_10BTSTAT); 350 if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100)) 351 mii->mii_media_status |= IFM_ACTIVE; 352 353 if (CSR_READ_4(dc_sc, DC_10BTCTRL) & DC_TCTL_AUTONEGENBL) { 354 /* Erg, still trying, I guess... */ 355 tstat = CSR_READ_4(dc_sc, DC_10BTSTAT); 356 if ((tstat & DC_TSTAT_ANEGSTAT) != DC_ASTAT_AUTONEGCMP) { 357 if ((DC_IS_MACRONIX(dc_sc) || DC_IS_PNICII(dc_sc)) && 358 (tstat & DC_TSTAT_ANEGSTAT) == DC_ASTAT_DISABLE) 359 goto skip; 360 mii->mii_media_active |= IFM_NONE; 361 return; 362 } 363 364 if (tstat & DC_TSTAT_LP_CAN_NWAY) { 365 anlpar = tstat >> 16; 366 if (anlpar & ANLPAR_T4 && 367 sc->mii_capabilities & BMSR_100TXHDX) 368 mii->mii_media_active |= IFM_100_T4; 369 else if (anlpar & ANLPAR_TX_FD && 370 sc->mii_capabilities & BMSR_100TXFDX) 371 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 372 else if (anlpar & ANLPAR_TX && 373 sc->mii_capabilities & BMSR_100TXHDX) 374 mii->mii_media_active |= IFM_100_TX; 375 else if (anlpar & ANLPAR_10_FD) 376 mii->mii_media_active |= IFM_10_T|IFM_FDX; 377 else if (anlpar & ANLPAR_10) 378 mii->mii_media_active |= IFM_10_T; 379 else 380 mii->mii_media_active |= IFM_NONE; 381 if (DC_IS_INTEL(dc_sc)) 382 DC_CLRBIT(dc_sc, DC_10BTCTRL, 383 DC_TCTL_AUTONEGENBL); 384 return; 385 } 386 /* 387 * If the other side doesn't support NWAY, then the 388 * best we can do is determine if we have a 10Mbps or 389 * 100Mbps link. There's no way to know if the link 390 * is full or half duplex, so we default to half duplex 391 * and hope that the user is clever enough to manually 392 * change the media settings if we're wrong. 393 */ 394 if (!(reg & DC_TSTAT_LS100)) 395 mii->mii_media_active |= IFM_100_TX; 396 else if (!(reg & DC_TSTAT_LS10)) 397 mii->mii_media_active |= IFM_10_T; 398 else 399 mii->mii_media_active |= IFM_NONE; 400 if (DC_IS_INTEL(dc_sc)) 401 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 402 return; 403 } 404 405 skip: 406 407 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL) 408 mii->mii_media_active |= IFM_10_T; 409 else 410 mii->mii_media_active |= IFM_100_TX; 411 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX) 412 mii->mii_media_active |= IFM_FDX; 413 414 return; 415 } 416 417 static int 418 dcphy_auto(struct mii_softc *mii) 419 { 420 struct dc_softc *sc; 421 422 sc = mii->mii_pdata->mii_ifp->if_softc; 423 424 DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL); 425 DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_FULLDUPLEX); 426 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET); 427 if (mii->mii_capabilities & BMSR_100TXHDX) 428 CSR_WRITE_4(sc, DC_10BTCTRL, 0x3FFFF); 429 else 430 CSR_WRITE_4(sc, DC_10BTCTRL, 0xFFFF); 431 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET); 432 DC_SETBIT(sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 433 DC_SETBIT(sc, DC_10BTSTAT, DC_ASTAT_TXDISABLE); 434 435 return(EJUSTRETURN); 436 } 437 438 static void 439 dcphy_reset(struct mii_softc *mii) 440 { 441 struct dc_softc *sc; 442 443 sc = mii->mii_pdata->mii_ifp->if_softc; 444 445 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET); 446 DELAY(1000); 447 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET); 448 449 return; 450 } 451 452