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 /* 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_var.h> 57 #include <net/if_arp.h> 58 #include <net/if_media.h> 59 60 #include <dev/mii/mii.h> 61 #include <dev/mii/miivar.h> 62 #include "miidevs.h" 63 64 #include <machine/bus.h> 65 #include <machine/resource.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 DEVMETHOD_END 100 }; 101 102 static driver_t dcphy_driver = { 103 "dcphy", 104 dcphy_methods, 105 sizeof(struct mii_softc) 106 }; 107 108 DRIVER_MODULE(dcphy, miibus, dcphy_driver, 0, 0); 109 110 static int dcphy_service(struct mii_softc *, struct mii_data *, int); 111 static void dcphy_status(struct mii_softc *); 112 static void dcphy_reset(struct mii_softc *); 113 static int dcphy_auto(struct mii_softc *); 114 115 static const struct mii_phy_funcs dcphy_funcs = { 116 dcphy_service, 117 dcphy_status, 118 dcphy_reset 119 }; 120 121 static int 122 dcphy_probe(device_t dev) 123 { 124 struct mii_attach_args *ma; 125 126 ma = device_get_ivars(dev); 127 128 /* 129 * The dc driver will report the 21143 vendor and device 130 * ID to let us know that it wants us to attach. 131 */ 132 if (ma->mii_id1 != DC_VENDORID_DEC || 133 ma->mii_id2 != DC_DEVICEID_21143) 134 return (ENXIO); 135 136 device_set_desc(dev, "Intel 21143 NWAY media interface"); 137 138 return (BUS_PROBE_DEFAULT); 139 } 140 141 static int 142 dcphy_attach(device_t dev) 143 { 144 struct mii_softc *sc; 145 struct dc_softc *dc_sc; 146 device_t brdev; 147 148 sc = device_get_softc(dev); 149 150 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, 151 &dcphy_funcs, 0); 152 153 /*PHY_RESET(sc);*/ 154 dc_sc = if_getsoftc(sc->mii_pdata->mii_ifp); 155 CSR_WRITE_4(dc_sc, DC_10BTSTAT, 0); 156 CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0); 157 158 brdev = device_get_parent(sc->mii_dev); 159 switch (pci_get_subdevice(brdev) << 16 | pci_get_subvendor(brdev)) { 160 case COMPAQ_PRESARIO_ID: 161 /* Example of how to only allow 10Mbps modes. */ 162 sc->mii_capabilities = BMSR_ANEG | BMSR_10TFDX | BMSR_10THDX; 163 break; 164 default: 165 if (dc_sc->dc_pmode == DC_PMODE_SIA) 166 sc->mii_capabilities = 167 BMSR_ANEG | BMSR_10TFDX | BMSR_10THDX; 168 else 169 sc->mii_capabilities = 170 BMSR_ANEG | BMSR_100TXFDX | BMSR_100TXHDX | 171 BMSR_10TFDX | BMSR_10THDX; 172 break; 173 } 174 175 sc->mii_capabilities &= sc->mii_capmask; 176 device_printf(dev, " "); 177 mii_phy_add_media(sc); 178 printf("\n"); 179 180 MIIBUS_MEDIAINIT(sc->mii_dev); 181 return (0); 182 } 183 184 static int 185 dcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 186 { 187 struct dc_softc *dc_sc; 188 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 189 int reg; 190 u_int32_t mode; 191 192 dc_sc = if_getsoftc(mii->mii_ifp); 193 194 switch (cmd) { 195 case MII_POLLSTAT: 196 break; 197 198 case MII_MEDIACHG: 199 /* 200 * If the interface is not up, don't do anything. 201 */ 202 if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0) 203 break; 204 205 mii->mii_media_active = IFM_NONE; 206 mode = CSR_READ_4(dc_sc, DC_NETCFG); 207 mode &= ~(DC_NETCFG_FULLDUPLEX | DC_NETCFG_PORTSEL | 208 DC_NETCFG_PCS | DC_NETCFG_SCRAMBLER | DC_NETCFG_SPEEDSEL); 209 210 switch (IFM_SUBTYPE(ife->ifm_media)) { 211 case IFM_AUTO: 212 /*PHY_RESET(sc);*/ 213 (void)dcphy_auto(sc); 214 break; 215 case IFM_100_TX: 216 PHY_RESET(sc); 217 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 218 mode |= DC_NETCFG_PORTSEL | DC_NETCFG_PCS | 219 DC_NETCFG_SCRAMBLER; 220 if ((ife->ifm_media & IFM_FDX) != 0) 221 mode |= DC_NETCFG_FULLDUPLEX; 222 else 223 mode &= ~DC_NETCFG_FULLDUPLEX; 224 CSR_WRITE_4(dc_sc, DC_NETCFG, mode); 225 break; 226 case IFM_10_T: 227 DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 228 DC_CLRBIT(dc_sc, DC_10BTCTRL, 0xFFFF); 229 if ((ife->ifm_media & IFM_FDX) != 0) 230 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3D); 231 else 232 DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3F); 233 DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET); 234 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 235 mode &= ~DC_NETCFG_PORTSEL; 236 mode |= DC_NETCFG_SPEEDSEL; 237 if ((ife->ifm_media & IFM_FDX) != 0) 238 mode |= DC_NETCFG_FULLDUPLEX; 239 else 240 mode &= ~DC_NETCFG_FULLDUPLEX; 241 CSR_WRITE_4(dc_sc, DC_NETCFG, mode); 242 break; 243 default: 244 return (EINVAL); 245 } 246 break; 247 248 case MII_TICK: 249 /* 250 * Is the interface even up? 251 */ 252 if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0) 253 return (0); 254 255 /* 256 * Only used for autonegotiation. 257 */ 258 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 259 break; 260 261 reg = CSR_READ_4(dc_sc, DC_10BTSTAT); 262 if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100)) 263 break; 264 265 /* 266 * Only retry autonegotiation every 5 seconds. 267 * 268 * Otherwise, fall through to calling dcphy_status() 269 * since real Intel 21143 chips don't show valid link 270 * status until autonegotiation is switched off, and 271 * that only happens in dcphy_status(). Without this, 272 * successful autonegotiation is never recognised on 273 * these chips. 274 */ 275 if (++sc->mii_ticks <= 50) 276 break; 277 278 sc->mii_ticks = 0; 279 dcphy_auto(sc); 280 281 break; 282 } 283 284 /* Update the media status. */ 285 PHY_STATUS(sc); 286 287 /* Callback if something changed. */ 288 mii_phy_update(sc, cmd); 289 return (0); 290 } 291 292 static void 293 dcphy_status(struct mii_softc *sc) 294 { 295 struct mii_data *mii = sc->mii_pdata; 296 int anlpar, tstat; 297 struct dc_softc *dc_sc; 298 299 dc_sc = if_getsoftc(mii->mii_ifp); 300 301 mii->mii_media_status = IFM_AVALID; 302 mii->mii_media_active = IFM_ETHER; 303 304 if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0) 305 return; 306 307 tstat = CSR_READ_4(dc_sc, DC_10BTSTAT); 308 if (!(tstat & DC_TSTAT_LS10) || !(tstat & DC_TSTAT_LS100)) 309 mii->mii_media_status |= IFM_ACTIVE; 310 311 if (CSR_READ_4(dc_sc, DC_10BTCTRL) & DC_TCTL_AUTONEGENBL) { 312 /* Erg, still trying, I guess... */ 313 if ((tstat & DC_TSTAT_ANEGSTAT) != DC_ASTAT_AUTONEGCMP) { 314 if ((DC_IS_MACRONIX(dc_sc) || DC_IS_PNICII(dc_sc)) && 315 (tstat & DC_TSTAT_ANEGSTAT) == DC_ASTAT_DISABLE) 316 goto skip; 317 mii->mii_media_active |= IFM_NONE; 318 return; 319 } 320 321 if (tstat & DC_TSTAT_LP_CAN_NWAY) { 322 anlpar = tstat >> 16; 323 if (anlpar & ANLPAR_TX_FD && 324 sc->mii_capabilities & BMSR_100TXFDX) 325 mii->mii_media_active |= IFM_100_TX | IFM_FDX; 326 else if (anlpar & ANLPAR_T4 && 327 sc->mii_capabilities & BMSR_100T4) 328 mii->mii_media_active |= IFM_100_T4 | IFM_HDX; 329 else if (anlpar & ANLPAR_TX && 330 sc->mii_capabilities & BMSR_100TXHDX) 331 mii->mii_media_active |= IFM_100_TX | IFM_HDX; 332 else if (anlpar & ANLPAR_10_FD) 333 mii->mii_media_active |= IFM_10_T | IFM_FDX; 334 else if (anlpar & ANLPAR_10) 335 mii->mii_media_active |= IFM_10_T | IFM_HDX; 336 else 337 mii->mii_media_active |= IFM_NONE; 338 if (DC_IS_INTEL(dc_sc)) 339 DC_CLRBIT(dc_sc, DC_10BTCTRL, 340 DC_TCTL_AUTONEGENBL); 341 return; 342 } 343 344 /* 345 * If the other side doesn't support NWAY, then the 346 * best we can do is determine if we have a 10Mbps or 347 * 100Mbps link. There's no way to know if the link 348 * is full or half duplex, so we default to half duplex 349 * and hope that the user is clever enough to manually 350 * change the media settings if we're wrong. 351 */ 352 if (!(tstat & DC_TSTAT_LS100)) 353 mii->mii_media_active |= IFM_100_TX | IFM_HDX; 354 else if (!(tstat & DC_TSTAT_LS10)) 355 mii->mii_media_active |= IFM_10_T | IFM_HDX; 356 else 357 mii->mii_media_active |= IFM_NONE; 358 if (DC_IS_INTEL(dc_sc)) 359 DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 360 return; 361 } 362 363 skip: 364 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL) 365 mii->mii_media_active |= IFM_10_T; 366 else 367 mii->mii_media_active |= IFM_100_TX; 368 if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX) 369 mii->mii_media_active |= IFM_FDX; 370 else 371 mii->mii_media_active |= IFM_HDX; 372 } 373 374 static int 375 dcphy_auto(struct mii_softc *mii) 376 { 377 struct dc_softc *sc; 378 379 sc = if_getsoftc(mii->mii_pdata->mii_ifp); 380 381 DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL); 382 DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_FULLDUPLEX); 383 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET); 384 if (mii->mii_capabilities & BMSR_100TXHDX) 385 CSR_WRITE_4(sc, DC_10BTCTRL, 0x3FFFF); 386 else 387 CSR_WRITE_4(sc, DC_10BTCTRL, 0xFFFF); 388 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET); 389 DC_SETBIT(sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL); 390 DC_SETBIT(sc, DC_10BTSTAT, DC_ASTAT_TXDISABLE); 391 392 return (EJUSTRETURN); 393 } 394 395 static void 396 dcphy_reset(struct mii_softc *mii) 397 { 398 struct dc_softc *sc; 399 400 sc = if_getsoftc(mii->mii_pdata->mii_ifp); 401 402 DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET); 403 DELAY(1000); 404 DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET); 405 } 406