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 (BUS_PROBE_DEFAULT); 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 device_t brdev; 145 146 sc = device_get_softc(dev); 147 ma = device_get_ivars(dev); 148 sc->mii_dev = device_get_parent(dev); 149 mii = device_get_softc(sc->mii_dev); 150 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 151 152 sc->mii_inst = mii->mii_instance; 153 sc->mii_phy = ma->mii_phyno; 154 sc->mii_service = dcphy_service; 155 sc->mii_pdata = mii; 156 157 sc->mii_flags |= MIIF_NOISOLATE; 158 mii->mii_instance++; 159 160 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 161 162 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 163 BMCR_ISO); 164 165 /*dcphy_reset(sc);*/ 166 dc_sc = mii->mii_ifp->if_softc; 167 CSR_WRITE_4(dc_sc, DC_10BTSTAT, 0); 168 CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0); 169 170 brdev = device_get_parent(sc->mii_dev); 171 switch (pci_get_subdevice(brdev) << 16 | pci_get_subvendor(brdev)) { 172 case COMPAQ_PRESARIO_ID: 173 /* Example of how to only allow 10Mbps modes. */ 174 sc->mii_capabilities = BMSR_ANEG | BMSR_10TFDX | BMSR_10THDX; 175 break; 176 default: 177 if (dc_sc->dc_pmode == DC_PMODE_SIA) 178 sc->mii_capabilities = 179 BMSR_ANEG | BMSR_10TFDX | BMSR_10THDX; 180 else 181 sc->mii_capabilities = 182 BMSR_ANEG | BMSR_100TXFDX | BMSR_100TXHDX | 183 BMSR_10TFDX | BMSR_10THDX; 184 break; 185 } 186 187 sc->mii_capabilities &= ma->mii_capmask; 188 device_printf(dev, " "); 189 mii_add_media(sc); 190 printf("\n"); 191 #undef ADD 192 193 MIIBUS_MEDIAINIT(sc->mii_dev); 194 return (0); 195 } 196 197 static int 198 dcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 199 { 200 struct dc_softc *dc_sc; 201 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 202 int reg; 203 u_int32_t mode; 204 205 dc_sc = mii->mii_ifp->if_softc; 206 207 switch (cmd) { 208 case MII_POLLSTAT: 209 /* 210 * If we're not polling our PHY instance, just return. 211 */ 212 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 213 return (0); 214 break; 215 216 case MII_MEDIACHG: 217 /* 218 * If the media indicates a different PHY instance, 219 * isolate ourselves. 220 */ 221 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 222 return (0); 223 224 /* 225 * If the interface is not up, don't do anything. 226 */ 227 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 228 break; 229 230 sc->mii_flags = 0; 231 mii->mii_media_active = IFM_NONE; 232 mode = CSR_READ_4(dc_sc, DC_NETCFG); 233 mode &= ~(DC_NETCFG_FULLDUPLEX | DC_NETCFG_PORTSEL | 234 DC_NETCFG_PCS | DC_NETCFG_SCRAMBLER | DC_NETCFG_SPEEDSEL); 235 236 switch (IFM_SUBTYPE(ife->ifm_media)) { 237 case IFM_AUTO: 238 /*dcphy_reset(sc);*/ 239 (void) dcphy_auto(sc); 240 break; 241 case IFM_100_T4: 242 /* 243 * XXX Not supported as a manual setting right now. 244 */ 245 return (EINVAL); 246 case IFM_100_TX: 247 dcphy_reset(sc); 248 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 249 mode |= DC_NETCFG_PORTSEL | DC_NETCFG_PCS | 250 DC_NETCFG_SCRAMBLER; 251 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) 252 mode |= DC_NETCFG_FULLDUPLEX; 253 else 254 mode &= ~DC_NETCFG_FULLDUPLEX; 255 CSR_WRITE_4(dc_sc, DC_NETCFG, mode); 256 break; 257 case IFM_10_T: 258 DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 259 DC_CLRBIT(dc_sc, DC_10BTCTRL, 0xFFFF); 260 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) 261 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3D); 262 else 263 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3F); 264 DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 265 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 266 mode &= ~DC_NETCFG_PORTSEL; 267 mode |= DC_NETCFG_SPEEDSEL; 268 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) 269 mode |= DC_NETCFG_FULLDUPLEX; 270 else 271 mode &= ~DC_NETCFG_FULLDUPLEX; 272 CSR_WRITE_4(dc_sc, DC_NETCFG, mode); 273 break; 274 default: 275 return (EINVAL); 276 } 277 break; 278 279 case MII_TICK: 280 /* 281 * If we're not currently selected, just return. 282 */ 283 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 284 return (0); 285 286 /* 287 * Is the interface even up? 288 */ 289 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 290 return (0); 291 292 /* 293 * Only used for autonegotiation. 294 */ 295 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 296 break; 297 298 reg = CSR_READ_4(dc_sc, DC_10BTSTAT); 299 if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100)) 300 break; 301 302 /* 303 * Only retry autonegotiation every 5 seconds. 304 * 305 * Otherwise, fall through to calling dcphy_status() 306 * since real Intel 21143 chips don't show valid link 307 * status until autonegotiation is switched off, and 308 * that only happens in dcphy_status(). Without this, 309 * successful autonegotiation is never recognised on 310 * these chips. 311 */ 312 if (++sc->mii_ticks <= 50) 313 break; 314 315 sc->mii_ticks = 0; 316 dcphy_auto(sc); 317 318 break; 319 } 320 321 /* Update the media status. */ 322 dcphy_status(sc); 323 324 /* Callback if something changed. */ 325 mii_phy_update(sc, cmd); 326 return (0); 327 } 328 329 static void 330 dcphy_status(struct mii_softc *sc) 331 { 332 struct mii_data *mii = sc->mii_pdata; 333 int reg, anlpar, tstat = 0; 334 struct dc_softc *dc_sc; 335 336 dc_sc = mii->mii_ifp->if_softc; 337 338 mii->mii_media_status = IFM_AVALID; 339 mii->mii_media_active = IFM_ETHER; 340 341 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 342 return; 343 344 reg = CSR_READ_4(dc_sc, DC_10BTSTAT); 345 if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100)) 346 mii->mii_media_status |= IFM_ACTIVE; 347 348 if (CSR_READ_4(dc_sc, DC_10BTCTRL) & DC_TCTL_AUTONEGENBL) { 349 /* Erg, still trying, I guess... */ 350 tstat = CSR_READ_4(dc_sc, DC_10BTSTAT); 351 if ((tstat & DC_TSTAT_ANEGSTAT) != DC_ASTAT_AUTONEGCMP) { 352 if ((DC_IS_MACRONIX(dc_sc) || DC_IS_PNICII(dc_sc)) && 353 (tstat & DC_TSTAT_ANEGSTAT) == DC_ASTAT_DISABLE) 354 goto skip; 355 mii->mii_media_active |= IFM_NONE; 356 return; 357 } 358 359 if (tstat & DC_TSTAT_LP_CAN_NWAY) { 360 anlpar = tstat >> 16; 361 if (anlpar & ANLPAR_TX_FD && 362 sc->mii_capabilities & BMSR_100TXFDX) 363 mii->mii_media_active |= IFM_100_TX | IFM_FDX; 364 else if (anlpar & ANLPAR_T4 && 365 sc->mii_capabilities & BMSR_100T4) 366 mii->mii_media_active |= IFM_100_T4; 367 else if (anlpar & ANLPAR_TX && 368 sc->mii_capabilities & BMSR_100TXHDX) 369 mii->mii_media_active |= IFM_100_TX; 370 else if (anlpar & ANLPAR_10_FD) 371 mii->mii_media_active |= IFM_10_T | IFM_FDX; 372 else if (anlpar & ANLPAR_10) 373 mii->mii_media_active |= IFM_10_T; 374 else 375 mii->mii_media_active |= IFM_NONE; 376 if (DC_IS_INTEL(dc_sc)) 377 DC_CLRBIT(dc_sc, DC_10BTCTRL, 378 DC_TCTL_AUTONEGENBL); 379 return; 380 } 381 382 /* 383 * If the other side doesn't support NWAY, then the 384 * best we can do is determine if we have a 10Mbps or 385 * 100Mbps link. There's no way to know if the link 386 * is full or half duplex, so we default to half duplex 387 * and hope that the user is clever enough to manually 388 * change the media settings if we're wrong. 389 */ 390 if (!(reg & DC_TSTAT_LS100)) 391 mii->mii_media_active |= IFM_100_TX; 392 else if (!(reg & DC_TSTAT_LS10)) 393 mii->mii_media_active |= IFM_10_T; 394 else 395 mii->mii_media_active |= IFM_NONE; 396 if (DC_IS_INTEL(dc_sc)) 397 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 398 return; 399 } 400 401 skip: 402 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL) 403 mii->mii_media_active |= IFM_10_T; 404 else 405 mii->mii_media_active |= IFM_100_TX; 406 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX) 407 mii->mii_media_active |= IFM_FDX; 408 } 409 410 static int 411 dcphy_auto(struct mii_softc *mii) 412 { 413 struct dc_softc *sc; 414 415 sc = mii->mii_pdata->mii_ifp->if_softc; 416 417 DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL); 418 DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_FULLDUPLEX); 419 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET); 420 if (mii->mii_capabilities & BMSR_100TXHDX) 421 CSR_WRITE_4(sc, DC_10BTCTRL, 0x3FFFF); 422 else 423 CSR_WRITE_4(sc, DC_10BTCTRL, 0xFFFF); 424 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET); 425 DC_SETBIT(sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 426 DC_SETBIT(sc, DC_10BTSTAT, DC_ASTAT_TXDISABLE); 427 428 return (EJUSTRETURN); 429 } 430 431 static void 432 dcphy_reset(struct mii_softc *mii) 433 { 434 struct dc_softc *sc; 435 436 sc = mii->mii_pdata->mii_ifp->if_softc; 437 438 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET); 439 DELAY(1000); 440 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET); 441 } 442