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 = ma->mii_data; 150 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 151 152 sc->mii_flags = miibus_get_flags(dev); 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 /* 159 * Apparently, we can neither isolate nor do loopback. 160 */ 161 sc->mii_flags |= MIIF_NOISOLATE | MIIF_NOLOOP; 162 163 /*dcphy_reset(sc);*/ 164 dc_sc = mii->mii_ifp->if_softc; 165 CSR_WRITE_4(dc_sc, DC_10BTSTAT, 0); 166 CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0); 167 168 brdev = device_get_parent(sc->mii_dev); 169 switch (pci_get_subdevice(brdev) << 16 | pci_get_subvendor(brdev)) { 170 case COMPAQ_PRESARIO_ID: 171 /* Example of how to only allow 10Mbps modes. */ 172 sc->mii_capabilities = BMSR_ANEG | BMSR_10TFDX | BMSR_10THDX; 173 break; 174 default: 175 if (dc_sc->dc_pmode == DC_PMODE_SIA) 176 sc->mii_capabilities = 177 BMSR_ANEG | BMSR_10TFDX | BMSR_10THDX; 178 else 179 sc->mii_capabilities = 180 BMSR_ANEG | BMSR_100TXFDX | BMSR_100TXHDX | 181 BMSR_10TFDX | BMSR_10THDX; 182 break; 183 } 184 185 sc->mii_capabilities &= ma->mii_capmask; 186 device_printf(dev, " "); 187 mii_phy_add_media(sc); 188 printf("\n"); 189 190 MIIBUS_MEDIAINIT(sc->mii_dev); 191 return (0); 192 } 193 194 static int 195 dcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 196 { 197 struct dc_softc *dc_sc; 198 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 199 int reg; 200 u_int32_t mode; 201 202 dc_sc = mii->mii_ifp->if_softc; 203 204 switch (cmd) { 205 case MII_POLLSTAT: 206 break; 207 208 case MII_MEDIACHG: 209 /* 210 * If the interface is not up, don't do anything. 211 */ 212 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 213 break; 214 215 mii->mii_media_active = IFM_NONE; 216 mode = CSR_READ_4(dc_sc, DC_NETCFG); 217 mode &= ~(DC_NETCFG_FULLDUPLEX | DC_NETCFG_PORTSEL | 218 DC_NETCFG_PCS | DC_NETCFG_SCRAMBLER | DC_NETCFG_SPEEDSEL); 219 220 switch (IFM_SUBTYPE(ife->ifm_media)) { 221 case IFM_AUTO: 222 /*dcphy_reset(sc);*/ 223 (void) dcphy_auto(sc); 224 break; 225 case IFM_100_TX: 226 dcphy_reset(sc); 227 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 228 mode |= DC_NETCFG_PORTSEL | DC_NETCFG_PCS | 229 DC_NETCFG_SCRAMBLER; 230 if ((ife->ifm_media & IFM_FDX) != 0) 231 mode |= DC_NETCFG_FULLDUPLEX; 232 else 233 mode &= ~DC_NETCFG_FULLDUPLEX; 234 CSR_WRITE_4(dc_sc, DC_NETCFG, mode); 235 break; 236 case IFM_10_T: 237 DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 238 DC_CLRBIT(dc_sc, DC_10BTCTRL, 0xFFFF); 239 if ((ife->ifm_media & IFM_FDX) != 0) 240 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3D); 241 else 242 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3F); 243 DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 244 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 245 mode &= ~DC_NETCFG_PORTSEL; 246 mode |= DC_NETCFG_SPEEDSEL; 247 if ((ife->ifm_media & IFM_FDX) != 0) 248 mode |= DC_NETCFG_FULLDUPLEX; 249 else 250 mode &= ~DC_NETCFG_FULLDUPLEX; 251 CSR_WRITE_4(dc_sc, DC_NETCFG, mode); 252 break; 253 default: 254 return (EINVAL); 255 } 256 break; 257 258 case MII_TICK: 259 /* 260 * Is the interface even up? 261 */ 262 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 263 return (0); 264 265 /* 266 * Only used for autonegotiation. 267 */ 268 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 269 break; 270 271 reg = CSR_READ_4(dc_sc, DC_10BTSTAT); 272 if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100)) 273 break; 274 275 /* 276 * Only retry autonegotiation every 5 seconds. 277 * 278 * Otherwise, fall through to calling dcphy_status() 279 * since real Intel 21143 chips don't show valid link 280 * status until autonegotiation is switched off, and 281 * that only happens in dcphy_status(). Without this, 282 * successful autonegotiation is never recognised on 283 * these chips. 284 */ 285 if (++sc->mii_ticks <= 50) 286 break; 287 288 sc->mii_ticks = 0; 289 dcphy_auto(sc); 290 291 break; 292 } 293 294 /* Update the media status. */ 295 dcphy_status(sc); 296 297 /* Callback if something changed. */ 298 mii_phy_update(sc, cmd); 299 return (0); 300 } 301 302 static void 303 dcphy_status(struct mii_softc *sc) 304 { 305 struct mii_data *mii = sc->mii_pdata; 306 int reg, anlpar, tstat = 0; 307 struct dc_softc *dc_sc; 308 309 dc_sc = mii->mii_ifp->if_softc; 310 311 mii->mii_media_status = IFM_AVALID; 312 mii->mii_media_active = IFM_ETHER; 313 314 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 315 return; 316 317 reg = CSR_READ_4(dc_sc, DC_10BTSTAT); 318 if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100)) 319 mii->mii_media_status |= IFM_ACTIVE; 320 321 if (CSR_READ_4(dc_sc, DC_10BTCTRL) & DC_TCTL_AUTONEGENBL) { 322 /* Erg, still trying, I guess... */ 323 tstat = CSR_READ_4(dc_sc, DC_10BTSTAT); 324 if ((tstat & DC_TSTAT_ANEGSTAT) != DC_ASTAT_AUTONEGCMP) { 325 if ((DC_IS_MACRONIX(dc_sc) || DC_IS_PNICII(dc_sc)) && 326 (tstat & DC_TSTAT_ANEGSTAT) == DC_ASTAT_DISABLE) 327 goto skip; 328 mii->mii_media_active |= IFM_NONE; 329 return; 330 } 331 332 if (tstat & DC_TSTAT_LP_CAN_NWAY) { 333 anlpar = tstat >> 16; 334 if (anlpar & ANLPAR_TX_FD && 335 sc->mii_capabilities & BMSR_100TXFDX) 336 mii->mii_media_active |= IFM_100_TX | IFM_FDX; 337 else if (anlpar & ANLPAR_T4 && 338 sc->mii_capabilities & BMSR_100T4) 339 mii->mii_media_active |= IFM_100_T4 | IFM_HDX; 340 else if (anlpar & ANLPAR_TX && 341 sc->mii_capabilities & BMSR_100TXHDX) 342 mii->mii_media_active |= IFM_100_TX | IFM_HDX; 343 else if (anlpar & ANLPAR_10_FD) 344 mii->mii_media_active |= IFM_10_T | IFM_FDX; 345 else if (anlpar & ANLPAR_10) 346 mii->mii_media_active |= IFM_10_T | IFM_HDX; 347 else 348 mii->mii_media_active |= IFM_NONE; 349 if (DC_IS_INTEL(dc_sc)) 350 DC_CLRBIT(dc_sc, DC_10BTCTRL, 351 DC_TCTL_AUTONEGENBL); 352 return; 353 } 354 355 /* 356 * If the other side doesn't support NWAY, then the 357 * best we can do is determine if we have a 10Mbps or 358 * 100Mbps link. There's no way to know if the link 359 * is full or half duplex, so we default to half duplex 360 * and hope that the user is clever enough to manually 361 * change the media settings if we're wrong. 362 */ 363 if (!(reg & DC_TSTAT_LS100)) 364 mii->mii_media_active |= IFM_100_TX | IFM_HDX; 365 else if (!(reg & DC_TSTAT_LS10)) 366 mii->mii_media_active |= IFM_10_T | IFM_HDX; 367 else 368 mii->mii_media_active |= IFM_NONE; 369 if (DC_IS_INTEL(dc_sc)) 370 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 371 return; 372 } 373 374 skip: 375 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL) 376 mii->mii_media_active |= IFM_10_T; 377 else 378 mii->mii_media_active |= IFM_100_TX; 379 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX) 380 mii->mii_media_active |= IFM_FDX; 381 else 382 mii->mii_media_active |= IFM_HDX; 383 } 384 385 static int 386 dcphy_auto(struct mii_softc *mii) 387 { 388 struct dc_softc *sc; 389 390 sc = mii->mii_pdata->mii_ifp->if_softc; 391 392 DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL); 393 DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_FULLDUPLEX); 394 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET); 395 if (mii->mii_capabilities & BMSR_100TXHDX) 396 CSR_WRITE_4(sc, DC_10BTCTRL, 0x3FFFF); 397 else 398 CSR_WRITE_4(sc, DC_10BTCTRL, 0xFFFF); 399 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET); 400 DC_SETBIT(sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 401 DC_SETBIT(sc, DC_10BTSTAT, DC_ASTAT_TXDISABLE); 402 403 return (EJUSTRETURN); 404 } 405 406 static void 407 dcphy_reset(struct mii_softc *mii) 408 { 409 struct dc_softc *sc; 410 411 sc = mii->mii_pdata->mii_ifp->if_softc; 412 413 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET); 414 DELAY(1000); 415 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET); 416 } 417