1/* $NetBSD: if_le_ledma.c,v 1.26 2005/12/11 12:23:44 christos 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__FBSDID("$FreeBSD$"); 35 36#include <sys/param.h> 37#include <sys/systm.h> 38#include <sys/bus.h> 39#include <sys/endian.h> 40#include <sys/kernel.h> 41#include <sys/lock.h> 42#include <sys/module.h> 43#include <sys/mutex.h> 44#include <sys/resource.h> 45#include <sys/rman.h> 46#include <sys/socket.h> 47 48#include <dev/ofw/ofw_bus.h> 49 50#include <machine/bus.h> 51#include <machine/ofw_machdep.h> 52#include <machine/resource.h> 53 54#include <net/ethernet.h> 55#include <net/if.h> 56#include <net/if_media.h> 57 58#include <sparc64/sbus/lsi64854reg.h> 59#include <sparc64/sbus/lsi64854var.h> 60 61#include <dev/le/lancereg.h> 62#include <dev/le/lancevar.h> 63#include <dev/le/am7990var.h> 64 65#define LEDMA_ALIGNMENT 8 /* ring desc. alignmet for NCR92C990 */ 66#define LEDMA_BOUNDARY (16*1024*1024) /* must not cross 16MB boundary */ 67#define LEDMA_MEMSIZE (16*1024) /* LANCE memory size */ 68#define LEREG1_RDP 0 /* Register Data Port */ 69#define LEREG1_RAP 2 /* Register Address Port */ 70 71struct le_dma_softc { 72 struct am7990_softc sc_am7990; /* glue to MI code */ 73 74 struct resource *sc_rres; 75 76 struct resource *sc_ires; 77 void *sc_ih; 78 79 bus_dma_tag_t sc_dmat; 80 bus_dmamap_t sc_dmam; 81 bus_addr_t sc_laddr; /* LANCE DMA address */ 82 83 struct lsi64854_softc *sc_dma; /* pointer to DMA engine */ 84}; 85 86static device_probe_t le_dma_probe; 87static device_attach_t le_dma_attach; 88static device_detach_t le_dma_detach; 89static device_resume_t le_dma_resume; 90static device_suspend_t le_dma_suspend; 91 92static device_method_t le_dma_methods[] = { 93 /* Device interface */ 94 DEVMETHOD(device_probe, le_dma_probe), 95 DEVMETHOD(device_attach, le_dma_attach), 96 DEVMETHOD(device_detach, le_dma_detach), 97 /* We can just use the suspend method here. */ 98 DEVMETHOD(device_shutdown, le_dma_suspend), 99 DEVMETHOD(device_suspend, le_dma_suspend), 100 DEVMETHOD(device_resume, le_dma_resume), 101 102 { 0, 0 } 103}; 104 105DEFINE_CLASS_0(le, le_dma_driver, le_dma_methods, sizeof(struct le_dma_softc)); 106DRIVER_MODULE(le, dma, le_dma_driver, le_devclass, 0, 0); 107MODULE_DEPEND(le, dma, 1, 1, 1); 108MODULE_DEPEND(le, ether, 1, 1, 1); 109 110/* 111 * Media types supported 112 */ 113static const int le_dma_supmedia[] = { 114 IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, 0), 115 IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0), 116 IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, 0) 117}; 118 119static void le_dma_wrcsr(struct lance_softc *, uint16_t, uint16_t); 120static uint16_t le_dma_rdcsr(struct lance_softc *, uint16_t); 121static void le_dma_setutp(struct lance_softc *); 122static void le_dma_setaui(struct lance_softc *); 123static int le_dma_supmediachange(struct lance_softc *); 124static void le_dma_supmediastatus(struct lance_softc *, struct ifmediareq *); 125static void le_dma_hwreset(struct lance_softc *); 126static int le_dma_hwintr(struct lance_softc *); 127static void le_dma_nocarrier(struct lance_softc *); 128static bus_dmamap_callback_t le_dma_dma_callback; 129 130static void 131le_dma_wrcsr(struct lance_softc *sc, uint16_t port, uint16_t val) 132{ 133 struct le_dma_softc *lesc = (struct le_dma_softc *)sc; 134 135 bus_write_2(lesc->sc_rres, LEREG1_RAP, port); 136 bus_barrier(lesc->sc_rres, LEREG1_RAP, 2, BUS_SPACE_BARRIER_WRITE); 137 bus_write_2(lesc->sc_rres, LEREG1_RDP, val); 138} 139 140static uint16_t 141le_dma_rdcsr(struct lance_softc *sc, uint16_t port) 142{ 143 struct le_dma_softc *lesc = (struct le_dma_softc *)sc; 144 145 bus_write_2(lesc->sc_rres, LEREG1_RAP, port); 146 bus_barrier(lesc->sc_rres, LEREG1_RAP, 2, BUS_SPACE_BARRIER_WRITE); 147 return (bus_read_2(lesc->sc_rres, LEREG1_RDP)); 148} 149 150static void 151le_dma_setutp(struct lance_softc *sc) 152{ 153 struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma; 154 155 L64854_SCSR(dma, L64854_GCSR(dma) | E_TP_AUI); 156 DELAY(20000); /* We must not touch the LANCE chip for 20ms. */ 157} 158 159static void 160le_dma_setaui(struct lance_softc *sc) 161{ 162 struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma; 163 164 L64854_SCSR(dma, L64854_GCSR(dma) & ~E_TP_AUI); 165 DELAY(20000); /* We must not touch the LANCE chip for 20ms. */ 166} 167 168static int 169le_dma_supmediachange(struct lance_softc *sc) 170{ 171 struct ifmedia *ifm = &sc->sc_media; 172 173 if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER) 174 return (EINVAL); 175 176 /* 177 * Switch to the selected media. If autoselect is set, we don't 178 * really have to do anything. We'll switch to the other media 179 * when we detect loss of carrier. 180 */ 181 switch (IFM_SUBTYPE(ifm->ifm_media)) { 182 case IFM_10_T: 183 le_dma_setutp(sc); 184 break; 185 186 case IFM_10_5: 187 le_dma_setaui(sc); 188 break; 189 190 case IFM_AUTO: 191 break; 192 193 default: 194 return (EINVAL); 195 } 196 197 return (0); 198} 199 200static void 201le_dma_supmediastatus(struct lance_softc *sc, struct ifmediareq *ifmr) 202{ 203 struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma; 204 205 /* 206 * Notify the world which media we're currently using. 207 */ 208 if (L64854_GCSR(dma) & E_TP_AUI) 209 ifmr->ifm_active = IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0); 210 else 211 ifmr->ifm_active = IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, 0); 212} 213 214static void 215le_dma_hwreset(struct lance_softc *sc) 216{ 217 struct le_dma_softc *lesc = (struct le_dma_softc *)sc; 218 struct lsi64854_softc *dma = lesc->sc_dma; 219 uint32_t aui_bit, csr; 220 221 /* 222 * Reset DMA channel. 223 */ 224 csr = L64854_GCSR(dma); 225 aui_bit = csr & E_TP_AUI; 226 DMA_RESET(dma); 227 228 /* Write bits 24-31 of Lance address. */ 229 bus_write_4(dma->sc_res, L64854_REG_ENBAR, 230 lesc->sc_laddr & 0xff000000); 231 232 DMA_ENINTR(dma); 233 234 /* 235 * Disable E-cache invalidates on chip writes. 236 * Retain previous cable selection bit. 237 */ 238 csr = L64854_GCSR(dma); 239 csr |= (E_DSBL_WR_INVAL | aui_bit); 240 L64854_SCSR(dma, csr); 241 DELAY(20000); /* We must not touch the LANCE chip for 20ms. */ 242} 243 244static int 245le_dma_hwintr(struct lance_softc *sc) 246{ 247 struct le_dma_softc *lesc = (struct le_dma_softc *)sc; 248 struct lsi64854_softc *dma = lesc->sc_dma; 249 250 return (DMA_INTR(dma)); 251} 252 253static void 254le_dma_nocarrier(struct lance_softc *sc) 255{ 256 struct le_dma_softc *lesc = (struct le_dma_softc *)sc; 257 258 /* 259 * Check if the user has requested a certain cable type, and 260 * if so, honor that request. 261 */ 262 263 if (L64854_GCSR(lesc->sc_dma) & E_TP_AUI) { 264 switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) { 265 case IFM_10_5: 266 case IFM_AUTO: 267 if_printf(sc->sc_ifp, "lost carrier on UTP port, " 268 "switching to AUI port\n"); 269 le_dma_setaui(sc); 270 } 271 } else { 272 switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) { 273 case IFM_10_T: 274 case IFM_AUTO: 275 if_printf(sc->sc_ifp, "lost carrier on AUI port, " 276 "switching to UTP port\n"); 277 le_dma_setutp(sc); 278 } 279 } 280} 281 282static void 283le_dma_dma_callback(void *xsc, bus_dma_segment_t *segs, int nsegs, int error) 284{ 285 struct le_dma_softc *lesc = (struct le_dma_softc *)xsc; 286 287 if (error != 0) 288 return; 289 KASSERT(nsegs == 1, ("%s: bad DMA segment count", __func__)); 290 lesc->sc_laddr = segs[0].ds_addr; 291} 292 293static int 294le_dma_probe(device_t dev) 295{ 296 297 if (strcmp(ofw_bus_get_name(dev), "le") == 0) { 298 device_set_desc(dev, "LANCE Ethernet"); 299 return (BUS_PROBE_DEFAULT); 300 } 301 return (ENXIO); 302} 303 304static int 305le_dma_attach(device_t dev) 306{ 307 struct le_dma_softc *lesc; 308 struct lsi64854_softc *dma; 309 struct lance_softc *sc; 310 int error, i; 311 312 lesc = device_get_softc(dev); 313 sc = &lesc->sc_am7990.lsc; 314 315 LE_LOCK_INIT(sc, device_get_nameunit(dev)); 316 317 /* 318 * Establish link to `ledma' device. 319 * XXX hackery. 320 */ 321 dma = (struct lsi64854_softc *)device_get_softc(device_get_parent(dev)); 322 lesc->sc_dma = dma; 323 lesc->sc_dma->sc_client = lesc; 324 325 i = 0; 326 lesc->sc_rres = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 327 &i, RF_ACTIVE); 328 if (lesc->sc_rres == NULL) { 329 device_printf(dev, "cannot allocate registers\n"); 330 error = ENXIO; 331 goto fail_mtx; 332 } 333 334 i = 0; 335 if ((lesc->sc_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ, 336 &i, RF_SHAREABLE | RF_ACTIVE)) == NULL) { 337 device_printf(dev, "cannot allocate interrupt\n"); 338 error = ENXIO; 339 goto fail_rres; 340 } 341 342 /* Attach the DMA engine. */ 343 error = lsi64854_attach(dma); 344 if (error != 0) { 345 device_printf(dev, "lsi64854_attach failed\n"); 346 goto fail_ires; 347 } 348 349 sc->sc_memsize = LEDMA_MEMSIZE; 350 error = bus_dma_tag_create( 351 dma->sc_parent_dmat, /* parent */ 352 LEDMA_ALIGNMENT, /* alignment */ 353 LEDMA_BOUNDARY, /* boundary */ 354 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 355 BUS_SPACE_MAXADDR, /* highaddr */ 356 NULL, NULL, /* filter, filterarg */ 357 sc->sc_memsize, /* maxsize */ 358 1, /* nsegments */ 359 sc->sc_memsize, /* maxsegsize */ 360 0, /* flags */ 361 NULL, NULL, /* lockfunc, lockarg */ 362 &lesc->sc_dmat); 363 if (error != 0) { 364 device_printf(dev, "cannot allocate buffer DMA tag\n"); 365 goto fail_lsi; 366 } 367 368 error = bus_dmamem_alloc(lesc->sc_dmat, (void **)&sc->sc_mem, 369 BUS_DMA_WAITOK | BUS_DMA_COHERENT, &lesc->sc_dmam); 370 if (error != 0) { 371 device_printf(dev, "cannot allocate DMA buffer memory\n"); 372 goto fail_dtag; 373 } 374 375 lesc->sc_laddr = 0; 376 error = bus_dmamap_load(lesc->sc_dmat, lesc->sc_dmam, sc->sc_mem, 377 sc->sc_memsize, le_dma_dma_callback, lesc, 0); 378 if (error != 0 || lesc->sc_laddr == 0) { 379 device_printf(dev, "cannot load DMA buffer map\n"); 380 goto fail_dmem; 381 } 382 383 sc->sc_addr = lesc->sc_laddr & 0xffffff; 384 sc->sc_flags = 0; 385 sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON; 386 387 sc->sc_mediachange = le_dma_supmediachange; 388 sc->sc_mediastatus = le_dma_supmediastatus; 389 sc->sc_supmedia = le_dma_supmedia; 390 sc->sc_nsupmedia = sizeof(le_dma_supmedia) / sizeof(le_dma_supmedia[0]); 391 sc->sc_defaultmedia = le_dma_supmedia[0]; 392 393 OF_getetheraddr(dev, sc->sc_enaddr); 394 395 sc->sc_copytodesc = lance_copytobuf_contig; 396 sc->sc_copyfromdesc = lance_copyfrombuf_contig; 397 sc->sc_copytobuf = lance_copytobuf_contig; 398 sc->sc_copyfrombuf = lance_copyfrombuf_contig; 399 sc->sc_zerobuf = lance_zerobuf_contig; 400 401 sc->sc_rdcsr = le_dma_rdcsr; 402 sc->sc_wrcsr = le_dma_wrcsr; 403 sc->sc_hwreset = le_dma_hwreset; 404 sc->sc_hwintr = le_dma_hwintr; 405 sc->sc_nocarrier = le_dma_nocarrier; 406 407 error = am7990_config(&lesc->sc_am7990, device_get_name(dev), 408 device_get_unit(dev)); 409 if (error != 0) { 410 device_printf(dev, "cannot attach Am7990\n"); 411 goto fail_dmap; 412 } 413 414 error = bus_setup_intr(dev, lesc->sc_ires, INTR_TYPE_NET | INTR_MPSAFE, 415 NULL, am7990_intr, sc, &lesc->sc_ih); 416 if (error != 0) { 417 device_printf(dev, "cannot set up interrupt\n"); 418 goto fail_am7990; 419 } 420 421 return (0); 422 423 fail_am7990: 424 am7990_detach(&lesc->sc_am7990); 425 fail_dmap: 426 bus_dmamap_unload(lesc->sc_dmat, lesc->sc_dmam); 427 fail_dmem: 428 bus_dmamem_free(lesc->sc_dmat, sc->sc_mem, lesc->sc_dmam); 429 fail_dtag: 430 bus_dma_tag_destroy(lesc->sc_dmat); 431 fail_lsi: 432 lsi64854_detach(dma); 433 fail_ires: 434 bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(lesc->sc_ires), 435 lesc->sc_ires); 436 fail_rres: 437 bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(lesc->sc_rres), 438 lesc->sc_rres); 439 fail_mtx: 440 LE_LOCK_DESTROY(sc); 441 return (error); 442} 443 444static int 445le_dma_detach(device_t dev) 446{ 447 struct le_dma_softc *lesc; 448 struct lance_softc *sc; 449 int error; 450 451 lesc = device_get_softc(dev); 452 sc = &lesc->sc_am7990.lsc; 453 454 bus_teardown_intr(dev, lesc->sc_ires, lesc->sc_ih); 455 am7990_detach(&lesc->sc_am7990); 456 bus_dmamap_unload(lesc->sc_dmat, lesc->sc_dmam); 457 bus_dmamem_free(lesc->sc_dmat, sc->sc_mem, lesc->sc_dmam); 458 bus_dma_tag_destroy(lesc->sc_dmat); 459 error = lsi64854_detach(lesc->sc_dma); 460 if (error != 0) 461 return (error); 462 bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(lesc->sc_ires), 463 lesc->sc_ires); 464 bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(lesc->sc_rres), 465 lesc->sc_rres); 466 LE_LOCK_DESTROY(sc); 467 468 return (0); 469} 470 471static int 472le_dma_suspend(device_t dev) 473{ 474 struct le_dma_softc *lesc; 475 476 lesc = device_get_softc(dev); 477 478 lance_suspend(&lesc->sc_am7990.lsc); 479 480 return (0); 481} 482 483static int 484le_dma_resume(device_t dev) 485{ 486 struct le_dma_softc *lesc; 487 488 lesc = device_get_softc(dev); 489 490 lance_resume(&lesc->sc_am7990.lsc); 491 492 return (0); 493} 494