1 /* $NetBSD: if_le_ledma.c,v 1.38 2022/09/25 18:03:04 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace 9 * Simulation Facility, NASA Ames Research Center; Paul Kranenburg. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 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 THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: if_le_ledma.c,v 1.38 2022/09/25 18:03:04 thorpej Exp $"); 35 36 #include "opt_inet.h" 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/mbuf.h> 41 #include <sys/syslog.h> 42 #include <sys/socket.h> 43 #include <sys/device.h> 44 45 #include <net/if.h> 46 #include <net/if_ether.h> 47 #include <net/if_media.h> 48 49 #ifdef INET 50 #include <netinet/in.h> 51 #include <netinet/if_inarp.h> 52 #endif 53 54 #include <sys/bus.h> 55 #include <sys/intr.h> 56 #include <machine/autoconf.h> 57 58 #include <dev/sbus/sbusvar.h> 59 60 #include <dev/ic/lsi64854reg.h> 61 #include <dev/ic/lsi64854var.h> 62 63 #include <dev/ic/lancereg.h> 64 #include <dev/ic/lancevar.h> 65 #include <dev/ic/am7990reg.h> 66 #include <dev/ic/am7990var.h> 67 68 #include "ioconf.h" 69 70 /* 71 * LANCE registers. 72 */ 73 #define LEREG1_RDP 0 /* Register Data port */ 74 #define LEREG1_RAP 2 /* Register Address port */ 75 76 struct le_softc { 77 struct am7990_softc sc_am7990; /* glue to MI code */ 78 bus_space_tag_t sc_bustag; 79 bus_dmamap_t sc_dmamap; 80 bus_space_handle_t sc_reg; /* LANCE registers */ 81 struct lsi64854_softc *sc_dma; /* pointer to my dma */ 82 u_int sc_laddr; /* LANCE DMA address */ 83 u_int sc_lostcount; 84 #define LE_LOSTTHRESH 5 /* lost carrior count to switch media */ 85 }; 86 87 #define MEMSIZE (16*1024) /* LANCE memory size */ 88 #define LEDMA_BOUNDARY (16*1024*1024) /* must not cross 16MB boundary */ 89 90 int lematch_ledma(device_t, cfdata_t, void *); 91 void leattach_ledma(device_t, device_t, void *); 92 93 /* 94 * Media types supported by the Sun4m. 95 */ 96 static int lemedia[] = { 97 IFM_ETHER | IFM_10_T, 98 IFM_ETHER | IFM_10_5, 99 IFM_ETHER | IFM_AUTO, 100 }; 101 #define NLEMEDIA __arraycount(lemedia) 102 103 void lesetutp(struct lance_softc *); 104 void lesetaui(struct lance_softc *); 105 106 int lemediachange(struct lance_softc *); 107 void lemediastatus(struct lance_softc *, struct ifmediareq *); 108 109 CFATTACH_DECL_NEW(le_ledma, sizeof(struct le_softc), 110 lematch_ledma, leattach_ledma, NULL, NULL); 111 112 #if defined(_KERNEL_OPT) 113 #include "opt_ddb.h" 114 #endif 115 116 static void lewrcsr(struct lance_softc *, uint16_t, uint16_t); 117 static uint16_t lerdcsr(struct lance_softc *, uint16_t); 118 static void lehwreset(struct lance_softc *); 119 static void lehwinit(struct lance_softc *); 120 static void lenocarrier(struct lance_softc *); 121 122 static void 123 lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val) 124 { 125 struct le_softc *lesc = (struct le_softc *)sc; 126 bus_space_tag_t t = lesc->sc_bustag; 127 bus_space_handle_t h = lesc->sc_reg; 128 129 bus_space_write_2(t, h, LEREG1_RAP, port); 130 bus_space_write_2(t, h, LEREG1_RDP, val); 131 132 #if defined(SUN4M) 133 /* 134 * We need to flush the Sbus->Mbus write buffers. This can most 135 * easily be accomplished by reading back the register that we 136 * just wrote (thanks to Chris Torek for this solution). 137 */ 138 (void)bus_space_read_2(t, h, LEREG1_RDP); 139 #endif 140 } 141 142 static uint16_t 143 lerdcsr(struct lance_softc *sc, uint16_t port) 144 { 145 struct le_softc *lesc = (struct le_softc *)sc; 146 bus_space_tag_t t = lesc->sc_bustag; 147 bus_space_handle_t h = lesc->sc_reg; 148 149 bus_space_write_2(t, h, LEREG1_RAP, port); 150 return bus_space_read_2(t, h, LEREG1_RDP); 151 } 152 153 void 154 lesetutp(struct lance_softc *sc) 155 { 156 struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma; 157 uint32_t csr; 158 159 csr = L64854_GCSR(dma); 160 csr |= E_TP_AUI; 161 L64854_SCSR(dma, csr); 162 delay(20000); /* must not touch le for 20ms */ 163 } 164 165 void 166 lesetaui(struct lance_softc *sc) 167 { 168 struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma; 169 uint32_t csr; 170 171 csr = L64854_GCSR(dma); 172 csr &= ~E_TP_AUI; 173 L64854_SCSR(dma, csr); 174 delay(20000); /* must not touch le for 20ms */ 175 } 176 177 int 178 lemediachange(struct lance_softc *sc) 179 { 180 struct ifmedia *ifm = &sc->sc_media; 181 182 if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER) 183 return EINVAL; 184 185 /* 186 * Switch to the selected media. If autoselect is 187 * set, we don't really have to do anything. We'll 188 * switch to the other media when we detect loss of 189 * carrier. 190 */ 191 switch (IFM_SUBTYPE(ifm->ifm_media)) { 192 case IFM_10_T: 193 lesetutp(sc); 194 break; 195 196 case IFM_10_5: 197 lesetaui(sc); 198 break; 199 200 case IFM_AUTO: 201 break; 202 203 default: 204 return EINVAL; 205 } 206 207 return 0; 208 } 209 210 void 211 lemediastatus(struct lance_softc *sc, struct ifmediareq *ifmr) 212 { 213 struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma; 214 215 /* 216 * Notify the world which media we're currently using. 217 */ 218 if (L64854_GCSR(dma) & E_TP_AUI) 219 ifmr->ifm_active = IFM_ETHER | IFM_10_T; 220 else 221 ifmr->ifm_active = IFM_ETHER | IFM_10_5; 222 } 223 224 static void 225 lehwreset(struct lance_softc *sc) 226 { 227 struct le_softc *lesc = (struct le_softc *)sc; 228 struct lsi64854_softc *dma = lesc->sc_dma; 229 uint32_t csr; 230 u_int aui_bit; 231 232 /* 233 * Reset DMA channel. 234 */ 235 csr = L64854_GCSR(dma); 236 aui_bit = csr & E_TP_AUI; 237 DMA_RESET(dma); 238 239 /* Write bits 24-31 of Lance address */ 240 bus_space_write_4(dma->sc_bustag, dma->sc_regs, L64854_REG_ENBAR, 241 lesc->sc_laddr & 0xff000000); 242 243 DMA_ENINTR(dma); 244 245 /* 246 * Disable E-cache invalidates on chip writes. 247 * Retain previous cable selection bit. 248 */ 249 csr = L64854_GCSR(dma); 250 csr |= (E_DSBL_WR_INVAL | aui_bit); 251 L64854_SCSR(dma, csr); 252 delay(20000); /* must not touch le for 20ms */ 253 } 254 255 static void 256 lehwinit(struct lance_softc *sc) 257 { 258 259 /* 260 * Make sure we're using the currently-enabled media type. 261 * XXX Actually, this is probably unnecessary, now. 262 */ 263 switch (IFM_SUBTYPE(sc->sc_media.ifm_cur->ifm_media)) { 264 case IFM_10_T: 265 lesetutp(sc); 266 break; 267 268 case IFM_10_5: 269 lesetaui(sc); 270 break; 271 } 272 } 273 274 static void 275 lenocarrier(struct lance_softc *sc) 276 { 277 struct le_softc *lesc = (struct le_softc *)sc; 278 279 /* it may take a while for modern switches to set 10baseT media */ 280 if (lesc->sc_lostcount++ < LE_LOSTTHRESH) 281 return; 282 283 lesc->sc_lostcount = 0; 284 285 /* 286 * Check if the user has requested a certain cable type, and 287 * if so, honor that request. 288 */ 289 printf("%s: lost carrier on ", device_xname(sc->sc_dev)); 290 291 if (L64854_GCSR(lesc->sc_dma) & E_TP_AUI) { 292 printf("UTP port"); 293 switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) { 294 case IFM_10_5: 295 case IFM_AUTO: 296 printf(", switching to AUI port"); 297 lesetaui(sc); 298 } 299 } else { 300 printf("AUI port"); 301 switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) { 302 case IFM_10_T: 303 case IFM_AUTO: 304 printf(", switching to UTP port"); 305 lesetutp(sc); 306 } 307 } 308 printf("\n"); 309 } 310 311 int 312 lematch_ledma(device_t parent, cfdata_t cf, void *aux) 313 { 314 struct sbus_attach_args *sa = aux; 315 316 return (strcmp(cf->cf_name, sa->sa_name) == 0); 317 } 318 319 320 void 321 leattach_ledma(device_t parent, device_t self, void *aux) 322 { 323 struct le_softc *lesc = device_private(self); 324 struct lance_softc *sc = &lesc->sc_am7990.lsc; 325 struct lsi64854_softc *lsi = device_private(parent); 326 struct sbus_attach_args *sa = aux; 327 bus_dma_tag_t dmatag = sa->sa_dmatag; 328 bus_dma_segment_t seg; 329 int rseg, error; 330 331 sc->sc_dev = self; 332 lesc->sc_bustag = sa->sa_bustag; 333 334 /* Establish link to `ledma' device */ 335 lesc->sc_dma = lsi; 336 lesc->sc_dma->sc_client = lesc; 337 338 /* Map device registers */ 339 if (sbus_bus_map(sa->sa_bustag, 340 sa->sa_slot, 341 sa->sa_offset, 342 sa->sa_size, 343 0, &lesc->sc_reg) != 0) { 344 aprint_error(": cannot map registers\n"); 345 return; 346 } 347 348 /* Allocate buffer memory */ 349 sc->sc_memsize = MEMSIZE; 350 351 /* Get a DMA handle */ 352 if ((error = bus_dmamap_create(dmatag, MEMSIZE, 1, MEMSIZE, 353 LEDMA_BOUNDARY, BUS_DMA_NOWAIT, &lesc->sc_dmamap)) != 0) { 354 aprint_error(": DMA map create error %d\n", error); 355 return; 356 } 357 358 /* Allocate DMA buffer */ 359 if ((error = bus_dmamem_alloc(dmatag, MEMSIZE, 0, LEDMA_BOUNDARY, 360 &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) { 361 aprint_error(": DMA buffer alloc error %d\n",error); 362 goto bad_destroy; 363 } 364 365 /* Map DMA buffer into kernel space */ 366 if ((error = bus_dmamem_map(dmatag, &seg, rseg, MEMSIZE, 367 (void **)&sc->sc_mem, BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) { 368 aprint_error(": DMA buffer map error %d\n", error); 369 goto bad_free; 370 } 371 372 /* Load DMA buffer */ 373 if ((error = bus_dmamap_load(dmatag, lesc->sc_dmamap, sc->sc_mem, 374 MEMSIZE, NULL, BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) { 375 aprint_error(": DMA buffer map load error %d\n", error); 376 goto bad_unmap; 377 } 378 379 lesc->sc_laddr = lesc->sc_dmamap->dm_segs[0].ds_addr; 380 sc->sc_addr = lesc->sc_laddr & 0xffffff; 381 sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON; 382 lesc->sc_lostcount = 0; 383 384 sc->sc_mediachange = lemediachange; 385 sc->sc_mediastatus = lemediastatus; 386 sc->sc_supmedia = lemedia; 387 sc->sc_nsupmedia = NLEMEDIA; 388 sc->sc_defaultmedia = IFM_ETHER | IFM_AUTO; 389 390 prom_getether(sa->sa_node, sc->sc_enaddr); 391 392 sc->sc_copytodesc = lance_copytobuf_contig; 393 sc->sc_copyfromdesc = lance_copyfrombuf_contig; 394 sc->sc_copytobuf = lance_copytobuf_contig; 395 sc->sc_copyfrombuf = lance_copyfrombuf_contig; 396 sc->sc_zerobuf = lance_zerobuf_contig; 397 398 sc->sc_rdcsr = lerdcsr; 399 sc->sc_wrcsr = lewrcsr; 400 sc->sc_hwinit = lehwinit; 401 sc->sc_nocarrier = lenocarrier; 402 sc->sc_hwreset = lehwreset; 403 404 /* Establish interrupt handler */ 405 if (sa->sa_nintr != 0) 406 (void)bus_intr_establish(sa->sa_bustag, sa->sa_pri, IPL_NET, 407 am7990_intr, sc); 408 409 am7990_config(&lesc->sc_am7990); 410 411 /* now initialize DMA */ 412 lehwreset(sc); 413 414 return; 415 416 bad_unmap: 417 bus_dmamem_unmap(dmatag, sc->sc_mem, MEMSIZE); 418 bad_free: 419 bus_dmamem_free(dmatag, &seg, rseg); 420 bad_destroy: 421 bus_dmamap_destroy(dmatag, lesc->sc_dmamap); 422 } 423
Indexes created Sun Sep 21 20:09:37 GMT 2025