1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1997, 1998, 1999 5 * Bill Paul <wpaul@ee.columbia.edu>. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Bill Paul. 18 * 4. Neither the name of the author nor the names of any co-contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 /* 39 * Pseudo-driver for internal NWAY support on DEC 21143 and workalike 40 * controllers. Technically we're abusing the miibus code to handle 41 * media selection and NWAY support here since there is no MII 42 * interface. However the logical operations are roughly the same, 43 * and the alternative is to create a fake MII interface in the driver, 44 * which is harder to do. 45 */ 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <sys/socket.h> 51 #include <sys/errno.h> 52 #include <sys/lock.h> 53 #include <sys/module.h> 54 #include <sys/mutex.h> 55 #include <sys/bus.h> 56 57 #include <net/if.h> 58 #include <net/if_var.h> 59 #include <net/if_arp.h> 60 #include <net/if_media.h> 61 62 #include <dev/mii/mii.h> 63 #include <dev/mii/miivar.h> 64 #include "miidevs.h" 65 66 #include <machine/bus.h> 67 #include <machine/resource.h> 68 69 #include <dev/pci/pcivar.h> 70 71 #include <dev/dc/if_dcreg.h> 72 73 #include "miibus_if.h" 74 75 #define DC_SETBIT(sc, reg, x) \ 76 CSR_WRITE_4(sc, reg, \ 77 CSR_READ_4(sc, reg) | x) 78 79 #define DC_CLRBIT(sc, reg, x) \ 80 CSR_WRITE_4(sc, reg, \ 81 CSR_READ_4(sc, reg) & ~x) 82 83 #define MIIF_AUTOTIMEOUT 0x0004 84 85 /* 86 * This is the subsystem ID for the built-in 21143 ethernet 87 * in several Compaq Presario systems. Apparently these are 88 * 10Mbps only, so we need to treat them specially. 89 */ 90 #define COMPAQ_PRESARIO_ID 0xb0bb0e11 91 92 static int dcphy_probe(device_t); 93 static int dcphy_attach(device_t); 94 95 static device_method_t dcphy_methods[] = { 96 /* device interface */ 97 DEVMETHOD(device_probe, dcphy_probe), 98 DEVMETHOD(device_attach, dcphy_attach), 99 DEVMETHOD(device_detach, mii_phy_detach), 100 DEVMETHOD(device_shutdown, bus_generic_shutdown), 101 DEVMETHOD_END 102 }; 103 104 static devclass_t dcphy_devclass; 105 106 static driver_t dcphy_driver = { 107 "dcphy", 108 dcphy_methods, 109 sizeof(struct mii_softc) 110 }; 111 112 DRIVER_MODULE(dcphy, miibus, dcphy_driver, dcphy_devclass, 0, 0); 113 114 static int dcphy_service(struct mii_softc *, struct mii_data *, int); 115 static void dcphy_status(struct mii_softc *); 116 static void dcphy_reset(struct mii_softc *); 117 static int dcphy_auto(struct mii_softc *); 118 119 static const struct mii_phy_funcs dcphy_funcs = { 120 dcphy_service, 121 dcphy_status, 122 dcphy_reset 123 }; 124 125 static int 126 dcphy_probe(device_t dev) 127 { 128 struct mii_attach_args *ma; 129 130 ma = device_get_ivars(dev); 131 132 /* 133 * The dc driver will report the 21143 vendor and device 134 * ID to let us know that it wants us to attach. 135 */ 136 if (ma->mii_id1 != DC_VENDORID_DEC || 137 ma->mii_id2 != DC_DEVICEID_21143) 138 return (ENXIO); 139 140 device_set_desc(dev, "Intel 21143 NWAY media interface"); 141 142 return (BUS_PROBE_DEFAULT); 143 } 144 145 static int 146 dcphy_attach(device_t dev) 147 { 148 struct mii_softc *sc; 149 struct dc_softc *dc_sc; 150 device_t brdev; 151 152 sc = device_get_softc(dev); 153 154 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, 155 &dcphy_funcs, 0); 156 157 /*PHY_RESET(sc);*/ 158 dc_sc = if_getsoftc(sc->mii_pdata->mii_ifp); 159 CSR_WRITE_4(dc_sc, DC_10BTSTAT, 0); 160 CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0); 161 162 brdev = device_get_parent(sc->mii_dev); 163 switch (pci_get_subdevice(brdev) << 16 | pci_get_subvendor(brdev)) { 164 case COMPAQ_PRESARIO_ID: 165 /* Example of how to only allow 10Mbps modes. */ 166 sc->mii_capabilities = BMSR_ANEG | BMSR_10TFDX | BMSR_10THDX; 167 break; 168 default: 169 if (dc_sc->dc_pmode == DC_PMODE_SIA) 170 sc->mii_capabilities = 171 BMSR_ANEG | BMSR_10TFDX | BMSR_10THDX; 172 else 173 sc->mii_capabilities = 174 BMSR_ANEG | BMSR_100TXFDX | BMSR_100TXHDX | 175 BMSR_10TFDX | BMSR_10THDX; 176 break; 177 } 178 179 sc->mii_capabilities &= sc->mii_capmask; 180 device_printf(dev, " "); 181 mii_phy_add_media(sc); 182 printf("\n"); 183 184 MIIBUS_MEDIAINIT(sc->mii_dev); 185 return (0); 186 } 187 188 static int 189 dcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 190 { 191 struct dc_softc *dc_sc; 192 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 193 int reg; 194 u_int32_t mode; 195 196 dc_sc = if_getsoftc(mii->mii_ifp); 197 198 switch (cmd) { 199 case MII_POLLSTAT: 200 break; 201 202 case MII_MEDIACHG: 203 /* 204 * If the interface is not up, don't do anything. 205 */ 206 if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0) 207 break; 208 209 mii->mii_media_active = IFM_NONE; 210 mode = CSR_READ_4(dc_sc, DC_NETCFG); 211 mode &= ~(DC_NETCFG_FULLDUPLEX | DC_NETCFG_PORTSEL | 212 DC_NETCFG_PCS | DC_NETCFG_SCRAMBLER | DC_NETCFG_SPEEDSEL); 213 214 switch (IFM_SUBTYPE(ife->ifm_media)) { 215 case IFM_AUTO: 216 /*PHY_RESET(sc);*/ 217 (void)dcphy_auto(sc); 218 break; 219 case IFM_100_TX: 220 PHY_RESET(sc); 221 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 222 mode |= DC_NETCFG_PORTSEL | DC_NETCFG_PCS | 223 DC_NETCFG_SCRAMBLER; 224 if ((ife->ifm_media & IFM_FDX) != 0) 225 mode |= DC_NETCFG_FULLDUPLEX; 226 else 227 mode &= ~DC_NETCFG_FULLDUPLEX; 228 CSR_WRITE_4(dc_sc, DC_NETCFG, mode); 229 break; 230 case IFM_10_T: 231 DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 232 DC_CLRBIT(dc_sc, DC_10BTCTRL, 0xFFFF); 233 if ((ife->ifm_media & IFM_FDX) != 0) 234 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3D); 235 else 236 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3F); 237 DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 238 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 239 mode &= ~DC_NETCFG_PORTSEL; 240 mode |= DC_NETCFG_SPEEDSEL; 241 if ((ife->ifm_media & IFM_FDX) != 0) 242 mode |= DC_NETCFG_FULLDUPLEX; 243 else 244 mode &= ~DC_NETCFG_FULLDUPLEX; 245 CSR_WRITE_4(dc_sc, DC_NETCFG, mode); 246 break; 247 default: 248 return (EINVAL); 249 } 250 break; 251 252 case MII_TICK: 253 /* 254 * Is the interface even up? 255 */ 256 if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0) 257 return (0); 258 259 /* 260 * Only used for autonegotiation. 261 */ 262 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 263 break; 264 265 reg = CSR_READ_4(dc_sc, DC_10BTSTAT); 266 if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100)) 267 break; 268 269 /* 270 * Only retry autonegotiation every 5 seconds. 271 * 272 * Otherwise, fall through to calling dcphy_status() 273 * since real Intel 21143 chips don't show valid link 274 * status until autonegotiation is switched off, and 275 * that only happens in dcphy_status(). Without this, 276 * successful autonegotiation is never recognised on 277 * these chips. 278 */ 279 if (++sc->mii_ticks <= 50) 280 break; 281 282 sc->mii_ticks = 0; 283 dcphy_auto(sc); 284 285 break; 286 } 287 288 /* Update the media status. */ 289 PHY_STATUS(sc); 290 291 /* Callback if something changed. */ 292 mii_phy_update(sc, cmd); 293 return (0); 294 } 295 296 static void 297 dcphy_status(struct mii_softc *sc) 298 { 299 struct mii_data *mii = sc->mii_pdata; 300 int anlpar, tstat; 301 struct dc_softc *dc_sc; 302 303 dc_sc = if_getsoftc(mii->mii_ifp); 304 305 mii->mii_media_status = IFM_AVALID; 306 mii->mii_media_active = IFM_ETHER; 307 308 if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0) 309 return; 310 311 tstat = CSR_READ_4(dc_sc, DC_10BTSTAT); 312 if (!(tstat & DC_TSTAT_LS10) || !(tstat & DC_TSTAT_LS100)) 313 mii->mii_media_status |= IFM_ACTIVE; 314 315 if (CSR_READ_4(dc_sc, DC_10BTCTRL) & DC_TCTL_AUTONEGENBL) { 316 /* Erg, still trying, I guess... */ 317 if ((tstat & DC_TSTAT_ANEGSTAT) != DC_ASTAT_AUTONEGCMP) { 318 if ((DC_IS_MACRONIX(dc_sc) || DC_IS_PNICII(dc_sc)) && 319 (tstat & DC_TSTAT_ANEGSTAT) == DC_ASTAT_DISABLE) 320 goto skip; 321 mii->mii_media_active |= IFM_NONE; 322 return; 323 } 324 325 if (tstat & DC_TSTAT_LP_CAN_NWAY) { 326 anlpar = tstat >> 16; 327 if (anlpar & ANLPAR_TX_FD && 328 sc->mii_capabilities & BMSR_100TXFDX) 329 mii->mii_media_active |= IFM_100_TX | IFM_FDX; 330 else if (anlpar & ANLPAR_T4 && 331 sc->mii_capabilities & BMSR_100T4) 332 mii->mii_media_active |= IFM_100_T4 | IFM_HDX; 333 else if (anlpar & ANLPAR_TX && 334 sc->mii_capabilities & BMSR_100TXHDX) 335 mii->mii_media_active |= IFM_100_TX | IFM_HDX; 336 else if (anlpar & ANLPAR_10_FD) 337 mii->mii_media_active |= IFM_10_T | IFM_FDX; 338 else if (anlpar & ANLPAR_10) 339 mii->mii_media_active |= IFM_10_T | IFM_HDX; 340 else 341 mii->mii_media_active |= IFM_NONE; 342 if (DC_IS_INTEL(dc_sc)) 343 DC_CLRBIT(dc_sc, DC_10BTCTRL, 344 DC_TCTL_AUTONEGENBL); 345 return; 346 } 347 348 /* 349 * If the other side doesn't support NWAY, then the 350 * best we can do is determine if we have a 10Mbps or 351 * 100Mbps link. There's no way to know if the link 352 * is full or half duplex, so we default to half duplex 353 * and hope that the user is clever enough to manually 354 * change the media settings if we're wrong. 355 */ 356 if (!(tstat & DC_TSTAT_LS100)) 357 mii->mii_media_active |= IFM_100_TX | IFM_HDX; 358 else if (!(tstat & DC_TSTAT_LS10)) 359 mii->mii_media_active |= IFM_10_T | IFM_HDX; 360 else 361 mii->mii_media_active |= IFM_NONE; 362 if (DC_IS_INTEL(dc_sc)) 363 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 364 return; 365 } 366 367 skip: 368 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL) 369 mii->mii_media_active |= IFM_10_T; 370 else 371 mii->mii_media_active |= IFM_100_TX; 372 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX) 373 mii->mii_media_active |= IFM_FDX; 374 else 375 mii->mii_media_active |= IFM_HDX; 376 } 377 378 static int 379 dcphy_auto(struct mii_softc *mii) 380 { 381 struct dc_softc *sc; 382 383 sc = if_getsoftc(mii->mii_pdata->mii_ifp); 384 385 DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL); 386 DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_FULLDUPLEX); 387 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET); 388 if (mii->mii_capabilities & BMSR_100TXHDX) 389 CSR_WRITE_4(sc, DC_10BTCTRL, 0x3FFFF); 390 else 391 CSR_WRITE_4(sc, DC_10BTCTRL, 0xFFFF); 392 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET); 393 DC_SETBIT(sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 394 DC_SETBIT(sc, DC_10BTSTAT, DC_ASTAT_TXDISABLE); 395 396 return (EJUSTRETURN); 397 } 398 399 static void 400 dcphy_reset(struct mii_softc *mii) 401 { 402 struct dc_softc *sc; 403 404 sc = if_getsoftc(mii->mii_pdata->mii_ifp); 405 406 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET); 407 DELAY(1000); 408 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET); 409 } 410