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 * $FreeBSD: src/sys/dev/mii/dcphy.c,v 1.2.2.2 2000/10/14 00:44:40 wpaul Exp $ 33 */ 34 35 /* 36 * Pseudo-driver for internal NWAY support on DEC 21143 and workalike 37 * controllers. Technically we're abusing the miibus code to handle 38 * media selection and NWAY support here since there is no MII 39 * interface. However the logical operations are roughly the same, 40 * and the alternative is to create a fake MII interface in the driver, 41 * which is harder to do. 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/socket.h> 48 #include <sys/errno.h> 49 #include <sys/module.h> 50 #include <sys/bus.h> 51 52 #include <net/if.h> 53 #include <net/if_arp.h> 54 #include <net/if_media.h> 55 #include <net/if_poll.h> 56 57 #include "mii.h" 58 #include "miivar.h" 59 #include "miidevs.h" 60 61 #include <bus/pci/pcivar.h> 62 #include "../dc/if_dcreg.h" 63 64 #include "miibus_if.h" 65 66 #define DC_SETBIT(sc, reg, x) \ 67 CSR_WRITE_4(sc, reg, \ 68 CSR_READ_4(sc, reg) | x) 69 70 #define DC_CLRBIT(sc, reg, x) \ 71 CSR_WRITE_4(sc, reg, \ 72 CSR_READ_4(sc, reg) & ~x) 73 74 #define MIIF_AUTOTIMEOUT 0x0004 75 76 /* 77 * This is the subsystem ID for the built-in 21143 ethernet 78 * in several Compaq Presario systems. Apparently these are 79 * 10Mbps only, so we need to treat them specially. 80 */ 81 #define COMPAQ_PRESARIO_ID 0xb0bb0e11 82 83 static int dcphy_probe (device_t); 84 static int dcphy_attach (device_t); 85 86 static device_method_t dcphy_methods[] = { 87 /* device interface */ 88 DEVMETHOD(device_probe, dcphy_probe), 89 DEVMETHOD(device_attach, dcphy_attach), 90 DEVMETHOD(device_detach, ukphy_detach), 91 DEVMETHOD(device_shutdown, bus_generic_shutdown), 92 DEVMETHOD_END 93 }; 94 95 static devclass_t dcphy_devclass; 96 97 static driver_t dcphy_driver = { 98 "dcphy", 99 dcphy_methods, 100 sizeof(struct mii_softc) 101 }; 102 103 DRIVER_MODULE(dcphy, miibus, dcphy_driver, dcphy_devclass, NULL, NULL); 104 105 static int dcphy_service(struct mii_softc *, struct mii_data *, int); 106 static void dcphy_status(struct mii_softc *); 107 static void dcphy_auto(struct mii_softc *); 108 static void dcphy_reset(struct mii_softc *); 109 110 static int 111 dcphy_probe(device_t dev) 112 { 113 struct mii_attach_args *ma; 114 115 ma = device_get_ivars(dev); 116 117 /* 118 * The dc driver will report the 21143 vendor and device 119 * ID to let us know that it wants us to attach. 120 */ 121 if (ma->mii_id1 != DC_VENDORID_DEC || 122 ma->mii_id2 != DC_DEVICEID_21143) 123 return(ENXIO); 124 125 device_set_desc(dev, "Intel 21143 NWAY media interface"); 126 127 return (0); 128 } 129 130 static int 131 dcphy_attach(device_t dev) 132 { 133 struct mii_softc *sc; 134 struct mii_attach_args *ma; 135 struct mii_data *mii; 136 struct dc_softc *dc_sc; 137 138 sc = device_get_softc(dev); 139 ma = device_get_ivars(dev); 140 mii_softc_init(sc, ma); 141 sc->mii_dev = device_get_parent(dev); 142 mii = device_get_softc(sc->mii_dev); 143 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 144 145 sc->mii_inst = mii->mii_instance; 146 sc->mii_service = dcphy_service; 147 sc->mii_reset = dcphy_reset; 148 sc->mii_anegticks = 50; 149 sc->mii_pdata = mii; 150 151 sc->mii_flags |= MIIF_NOISOLATE; 152 mii->mii_instance++; 153 154 /*dcphy_reset(sc);*/ 155 dc_sc = mii->mii_ifp->if_softc; 156 CSR_WRITE_4(dc_sc, DC_10BTSTAT, 0); 157 CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0); 158 159 switch(pci_read_config(device_get_parent(sc->mii_dev), 160 DC_PCI_CSID, 4)) { 161 case COMPAQ_PRESARIO_ID: 162 /* Example of how to only allow 10Mbps modes. */ 163 sc->mii_capabilities = BMSR_ANEG|BMSR_10TFDX|BMSR_10THDX; 164 break; 165 default: 166 if (dc_sc->dc_pmode == DC_PMODE_SIA) { 167 sc->mii_capabilities = 168 BMSR_ANEG|BMSR_10TFDX|BMSR_10THDX; 169 } else { 170 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 171 172 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, 173 sc->mii_inst), MII_MEDIA_100_TX); 174 175 #undef ADD 176 177 sc->mii_capabilities = 178 BMSR_ANEG|BMSR_100TXFDX|BMSR_100TXHDX| 179 BMSR_10TFDX|BMSR_10THDX; 180 } 181 break; 182 } 183 184 #ifdef notyet 185 if (dc_sc->dc_type == DC_TYPE_21145) 186 sc->mii_capabilities = BMSR_10THDX; 187 #endif 188 189 sc->mii_capabilities &= ma->mii_capmask; 190 device_printf(dev, " "); 191 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 192 kprintf("no media present"); 193 else 194 mii_phy_add_media(sc); 195 kprintf("\n"); 196 197 MIIBUS_MEDIAINIT(sc->mii_dev); 198 return(0); 199 } 200 201 static int 202 dcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 203 { 204 struct dc_softc *dc_sc; 205 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 206 int reg; 207 u_int32_t mode; 208 209 dc_sc = mii->mii_ifp->if_softc; 210 211 switch (cmd) { 212 case MII_POLLSTAT: 213 /* 214 * If we're not polling our PHY instance, just return. 215 */ 216 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 217 return (0); 218 } 219 break; 220 221 case MII_MEDIACHG: 222 /* 223 * If the media indicates a different PHY instance, 224 * isolate ourselves. XXX how? 225 */ 226 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 227 return (0); 228 } 229 230 /* 231 * If the interface is not up, don't do anything. 232 */ 233 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 234 break; 235 236 sc->mii_flags = 0; 237 mii->mii_media_active = IFM_NONE; 238 mode = CSR_READ_4(dc_sc, DC_NETCFG); 239 mode &= ~(DC_NETCFG_FULLDUPLEX|DC_NETCFG_PORTSEL| 240 DC_NETCFG_PCS|DC_NETCFG_SCRAMBLER|DC_NETCFG_SPEEDSEL); 241 242 switch (IFM_SUBTYPE(ife->ifm_media)) { 243 case IFM_AUTO: 244 /*dcphy_reset(sc);*/ 245 dcphy_auto(sc); 246 break; 247 case IFM_100_T4: 248 /* 249 * XXX Not supported as a manual setting right now. 250 */ 251 return (EINVAL); 252 case IFM_100_TX: 253 dcphy_reset(sc); 254 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 255 mode |= DC_NETCFG_PORTSEL|DC_NETCFG_PCS| 256 DC_NETCFG_SCRAMBLER; 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 case IFM_10_T: 264 DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 265 DC_CLRBIT(dc_sc, DC_10BTCTRL, 0xFFFF); 266 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) 267 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3D); 268 else 269 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3F); 270 DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 271 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 272 mode &= ~DC_NETCFG_PORTSEL; 273 mode |= DC_NETCFG_SPEEDSEL; 274 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) 275 mode |= DC_NETCFG_FULLDUPLEX; 276 else 277 mode &= ~DC_NETCFG_FULLDUPLEX; 278 CSR_WRITE_4(dc_sc, DC_NETCFG, mode); 279 break; 280 default: 281 return(EINVAL); 282 } 283 break; 284 285 case MII_TICK: 286 /* 287 * If we're not currently selected, just return. 288 */ 289 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 290 return (0); 291 292 /* 293 * Is the interface even up? 294 */ 295 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 296 return (0); 297 298 /* 299 * Only used for autonegotiation. 300 */ 301 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 302 break; 303 304 reg = CSR_READ_4(dc_sc, DC_10BTSTAT); 305 if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100)) 306 return(0); 307 308 /* 309 * Only retry autonegotiation every mii_anegticks seconds. 310 * 311 * Otherwise, fall through to calling dcphy_status() 312 * since real Intel 21143 chips don't show valid link 313 * status until autonegotiation is switched off, and 314 * that only happens in dcphy_status(). Without this, 315 * successful autonegotation is never recognised on 316 * these chips. 317 */ 318 if (++sc->mii_ticks <= sc->mii_anegticks) 319 break; 320 321 sc->mii_ticks = 0; 322 dcphy_auto(sc); 323 324 break; 325 } 326 327 /* Update the media status. */ 328 dcphy_status(sc); 329 330 /* Callback if something changed. */ 331 mii_phy_update(sc, cmd); 332 return (0); 333 } 334 335 static void 336 dcphy_status(struct mii_softc *sc) 337 { 338 struct mii_data *mii = sc->mii_pdata; 339 int reg, anlpar, tstat = 0; 340 struct dc_softc *dc_sc; 341 342 dc_sc = mii->mii_ifp->if_softc; 343 344 mii->mii_media_status = IFM_AVALID; 345 mii->mii_media_active = IFM_ETHER; 346 347 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 348 return; 349 350 reg = CSR_READ_4(dc_sc, DC_10BTSTAT); 351 if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100)) 352 mii->mii_media_status |= IFM_ACTIVE; 353 354 if (CSR_READ_4(dc_sc, DC_10BTCTRL) & DC_TCTL_AUTONEGENBL) { 355 /* Erg, still trying, I guess... */ 356 tstat = CSR_READ_4(dc_sc, DC_10BTSTAT); 357 if ((tstat & DC_TSTAT_ANEGSTAT) != DC_ASTAT_AUTONEGCMP) { 358 if ((DC_IS_MACRONIX(dc_sc) || DC_IS_PNICII(dc_sc)) && 359 (tstat & DC_TSTAT_ANEGSTAT) == DC_ASTAT_DISABLE) 360 goto skip; 361 mii->mii_media_active |= IFM_NONE; 362 return; 363 } 364 365 if (tstat & DC_TSTAT_LP_CAN_NWAY) { 366 anlpar = tstat >> 16; 367 if (anlpar & ANLPAR_T4 && 368 sc->mii_capabilities & BMSR_100TXHDX) 369 mii->mii_media_active |= IFM_100_T4; 370 else if (anlpar & ANLPAR_TX_FD && 371 sc->mii_capabilities & BMSR_100TXFDX) 372 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 373 else if (anlpar & ANLPAR_TX && 374 sc->mii_capabilities & BMSR_100TXHDX) 375 mii->mii_media_active |= IFM_100_TX; 376 else if (anlpar & ANLPAR_10_FD) 377 mii->mii_media_active |= IFM_10_T|IFM_FDX; 378 else if (anlpar & ANLPAR_10) 379 mii->mii_media_active |= IFM_10_T; 380 else 381 mii->mii_media_active |= IFM_NONE; 382 if (DC_IS_INTEL(dc_sc)) 383 DC_CLRBIT(dc_sc, DC_10BTCTRL, 384 DC_TCTL_AUTONEGENBL); 385 return; 386 } 387 /* 388 * If the other side doesn't support NWAY, then the 389 * best we can do is determine if we have a 10Mbps or 390 * 100Mbps link. There's no way to know if the link 391 * is full or half duplex, so we default to half duplex 392 * and hope that the user is clever enough to manually 393 * change the media settings if we're wrong. 394 */ 395 if (!(reg & DC_TSTAT_LS100)) 396 mii->mii_media_active |= IFM_100_TX; 397 else if (!(reg & DC_TSTAT_LS10)) 398 mii->mii_media_active |= IFM_10_T; 399 else 400 mii->mii_media_active |= IFM_NONE; 401 if (DC_IS_INTEL(dc_sc)) 402 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 403 return; 404 } 405 406 skip: 407 408 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL) 409 mii->mii_media_active |= IFM_10_T; 410 else 411 mii->mii_media_active |= IFM_100_TX; 412 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX) 413 mii->mii_media_active |= IFM_FDX; 414 415 return; 416 } 417 418 static void 419 dcphy_auto(struct mii_softc *sc) 420 { 421 struct dc_softc *dc_sc = sc->mii_pdata->mii_ifp->if_softc; 422 423 DC_CLRBIT(dc_sc, DC_NETCFG, DC_NETCFG_PORTSEL); 424 DC_SETBIT(dc_sc, DC_NETCFG, DC_NETCFG_FULLDUPLEX); 425 DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 426 if (sc->mii_capabilities & BMSR_100TXHDX) 427 CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0x3FFFF); 428 else 429 CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0xFFFF); 430 DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 431 DC_SETBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 432 DC_SETBIT(dc_sc, DC_10BTSTAT, DC_ASTAT_TXDISABLE); 433 } 434 435 static void 436 dcphy_reset(struct mii_softc *sc) 437 { 438 struct dc_softc *dc_sc = sc->mii_pdata->mii_ifp->if_softc; 439 440 DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 441 DELAY(1000); 442 DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 443 } 444