if_le_ledma.c revision 155093
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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40#include <sys/cdefs.h> 41__FBSDID("$FreeBSD: head/sys/dev/le/if_le_ledma.c 155093 2006-01-31 14:48:58Z marius $"); 42 43#include <sys/param.h> 44#include <sys/systm.h> 45#include <sys/bus.h> 46#include <sys/endian.h> 47#include <sys/kernel.h> 48#include <sys/lock.h> 49#include <sys/module.h> 50#include <sys/mutex.h> 51#include <sys/resource.h> 52#include <sys/rman.h> 53#include <sys/socket.h> 54 55#include <dev/ofw/ofw_bus.h> 56 57#include <machine/bus.h> 58#include <machine/ofw_machdep.h> 59#include <machine/resource.h> 60 61#include <net/ethernet.h> 62#include <net/if.h> 63#include <net/if_media.h> 64 65#include <sparc64/sbus/lsi64854reg.h> 66#include <sparc64/sbus/lsi64854var.h> 67 68#include <dev/le/lancereg.h> 69#include <dev/le/lancevar.h> 70#include <dev/le/am7990var.h> 71 72#define LEDMA_BOUNDARY (16*1024*1024) /* must not cross 16MB boundary */ 73#define LEDMA_MEMSIZE (16*1024) /* LANCE memory size */ 74#define LEREG1_RDP 0 /* Register Data Port */ 75#define LEREG1_RAP 2 /* Register Address Port */ 76 77struct le_dma_softc { 78 struct am7990_softc sc_am7990; /* glue to MI code */ 79 80 int sc_rrid; 81 struct resource *sc_rres; 82 bus_space_tag_t sc_regt; 83 bus_space_handle_t sc_regh; 84 85 int sc_irid; 86 struct resource *sc_ires; 87 void *sc_ih; 88 89 bus_dma_tag_t sc_dmat; 90 bus_dmamap_t sc_dmam; 91 bus_addr_t sc_laddr; /* LANCE DMA address */ 92 93 struct lsi64854_softc *sc_dma; /* pointer to DMA engine */ 94}; 95 96static device_probe_t le_dma_probe; 97static device_attach_t le_dma_attach; 98static device_detach_t le_dma_detach; 99static device_resume_t le_dma_resume; 100static device_suspend_t le_dma_suspend; 101 102static device_method_t le_dma_methods[] = { 103 /* Device interface */ 104 DEVMETHOD(device_probe, le_dma_probe), 105 DEVMETHOD(device_attach, le_dma_attach), 106 DEVMETHOD(device_detach, le_dma_detach), 107 /* We can just use the suspend method here. */ 108 DEVMETHOD(device_shutdown, le_dma_suspend), 109 DEVMETHOD(device_suspend, le_dma_suspend), 110 DEVMETHOD(device_resume, le_dma_resume), 111 112 { 0, 0 } 113}; 114 115DEFINE_CLASS_0(le, le_dma_driver, le_dma_methods, sizeof(struct le_dma_softc)); 116DRIVER_MODULE(le, dma, le_dma_driver, le_devclass, 0, 0); 117MODULE_DEPEND(le, ether, 1, 1, 1); 118 119/* 120 * Media types supported 121 */ 122static const int le_dma_supmedia[] = { 123 IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, 0), 124 IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0), 125 IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, 0) 126}; 127 128static void le_dma_wrcsr(struct lance_softc *, uint16_t, uint16_t); 129static uint16_t le_dma_rdcsr(struct lance_softc *, uint16_t); 130static void le_dma_setutp(struct lance_softc *); 131static void le_dma_setaui(struct lance_softc *); 132static int le_dma_supmediachange(struct lance_softc *); 133static void le_dma_supmediastatus(struct lance_softc *, struct ifmediareq *); 134static void le_dma_hwreset(struct lance_softc *); 135static int le_dma_hwintr(struct lance_softc *); 136static void le_dma_nocarrier(struct lance_softc *); 137static bus_dmamap_callback_t le_dma_dma_callback; 138 139static void 140le_dma_wrcsr(struct lance_softc *sc, uint16_t port, uint16_t val) 141{ 142 struct le_dma_softc *lesc = (struct le_dma_softc *)sc; 143 144 bus_space_write_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, port); 145 bus_space_barrier(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, 2, 146 BUS_SPACE_BARRIER_WRITE); 147 bus_space_write_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RDP, val); 148} 149 150static uint16_t 151le_dma_rdcsr(struct lance_softc *sc, uint16_t port) 152{ 153 struct le_dma_softc *lesc = (struct le_dma_softc *)sc; 154 155 bus_space_write_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, port); 156 bus_space_barrier(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, 2, 157 BUS_SPACE_BARRIER_WRITE); 158 return (bus_space_read_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RDP)); 159} 160 161static void 162le_dma_setutp(struct lance_softc *sc) 163{ 164 struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma; 165 166 L64854_SCSR(dma, L64854_GCSR(dma) | E_TP_AUI); 167 DELAY(20000); /* We must not touch the LANCE chip for 20ms. */ 168} 169 170static void 171le_dma_setaui(struct lance_softc *sc) 172{ 173 struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma; 174 175 L64854_SCSR(dma, L64854_GCSR(dma) & ~E_TP_AUI); 176 DELAY(20000); /* We must not touch the LANCE chip for 20ms. */ 177} 178 179static int 180le_dma_supmediachange(struct lance_softc *sc) 181{ 182 struct ifmedia *ifm = &sc->sc_media; 183 184 if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER) 185 return (EINVAL); 186 187 /* 188 * Switch to the selected media. If autoselect is set, we don't 189 * really have to do anything. We'll switch to the other media 190 * when we detect loss of carrier. 191 */ 192 switch (IFM_SUBTYPE(ifm->ifm_media)) { 193 case IFM_10_T: 194 le_dma_setutp(sc); 195 break; 196 197 case IFM_10_5: 198 le_dma_setaui(sc); 199 break; 200 201 case IFM_AUTO: 202 break; 203 204 default: 205 return (EINVAL); 206 } 207 208 return (0); 209} 210 211static void 212le_dma_supmediastatus(struct lance_softc *sc, struct ifmediareq *ifmr) 213{ 214 struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma; 215 216 /* 217 * Notify the world which media we're currently using. 218 */ 219 if (L64854_GCSR(dma) & E_TP_AUI) 220 ifmr->ifm_active = IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0); 221 else 222 ifmr->ifm_active = IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, 0); 223} 224 225static void 226le_dma_hwreset(struct lance_softc *sc) 227{ 228 struct le_dma_softc *lesc = (struct le_dma_softc *)sc; 229 struct lsi64854_softc *dma = lesc->sc_dma; 230 uint32_t aui_bit, csr; 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_regt, dma->sc_regh, 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); /* We must not touch the LANCE chip for 20ms. */ 253} 254 255static int 256le_dma_hwintr(struct lance_softc *sc) 257{ 258 struct le_dma_softc *lesc = (struct le_dma_softc *)sc; 259 struct lsi64854_softc *dma = lesc->sc_dma; 260 261 return (DMA_INTR(dma)); 262} 263 264static void 265le_dma_nocarrier(struct lance_softc *sc) 266{ 267 struct le_dma_softc *lesc = (struct le_dma_softc *)sc; 268 269 /* 270 * Check if the user has requested a certain cable type, and 271 * if so, honor that request. 272 */ 273 274 if (L64854_GCSR(lesc->sc_dma) & E_TP_AUI) { 275 switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) { 276 case IFM_10_5: 277 case IFM_AUTO: 278 if_printf(sc->sc_ifp, "lost carrier on UTP port, " 279 "switching to AUI port\n"); 280 le_dma_setaui(sc); 281 } 282 } else { 283 switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) { 284 case IFM_10_T: 285 case IFM_AUTO: 286 if_printf(sc->sc_ifp, "lost carrier on AUI port, " 287 "switching to UTP port\n"); 288 le_dma_setutp(sc); 289 } 290 } 291} 292 293static void 294le_dma_dma_callback(void *xsc, bus_dma_segment_t *segs, int nsegs, int error) 295{ 296 struct le_dma_softc *lesc = (struct le_dma_softc *)xsc; 297 298 if (error != 0) 299 return; 300 KASSERT(nsegs == 1, ("%s: bad DMA segment count", __func__)); 301 lesc->sc_laddr = segs[0].ds_addr; 302} 303 304static int 305le_dma_probe(device_t dev) 306{ 307 308 if (strcmp(ofw_bus_get_name(dev), "le") == 0) { 309 device_set_desc(dev, "LANCE Ethernet"); 310 return (BUS_PROBE_DEFAULT); 311 } 312 return (ENXIO); 313} 314 315static int 316le_dma_attach(device_t dev) 317{ 318 struct le_dma_softc *lesc; 319 struct lsi64854_softc *dma; 320 struct lance_softc *sc; 321 int error; 322 323 lesc = device_get_softc(dev); 324 sc = &lesc->sc_am7990.lsc; 325 326 LE_LOCK_INIT(sc, device_get_nameunit(dev)); 327 328 /* 329 * Establish link to `ledma' device. 330 * XXX hackery. 331 */ 332 dma = (struct lsi64854_softc *)device_get_softc(device_get_parent(dev)); 333 lesc->sc_dma = dma; 334 lesc->sc_dma->sc_client = lesc; 335 336 lesc->sc_rrid = 0; 337 lesc->sc_rres = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 338 &lesc->sc_rrid, RF_ACTIVE); 339 if (lesc->sc_rres == NULL) { 340 device_printf(dev, "cannot allocate registers\n"); 341 error = ENXIO; 342 goto fail_mtx; 343 } 344 lesc->sc_regt = rman_get_bustag(lesc->sc_rres); 345 lesc->sc_regh = rman_get_bushandle(lesc->sc_rres); 346 347 lesc->sc_irid = 0; 348 if ((lesc->sc_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ, 349 &lesc->sc_irid, RF_SHAREABLE | RF_ACTIVE)) == NULL) { 350 device_printf(dev, "cannot allocate interrupt\n"); 351 error = ENXIO; 352 goto fail_rres; 353 } 354 355 sc->sc_memsize = LEDMA_MEMSIZE; 356 error = bus_dma_tag_create( 357 dma->sc_parent_dmat, /* parent */ 358 1, LEDMA_BOUNDARY, /* alignment, boundary */ 359 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 360 BUS_SPACE_MAXADDR, /* highaddr */ 361 NULL, NULL, /* filter, filterarg */ 362 sc->sc_memsize, /* maxsize */ 363 1, /* nsegments */ 364 sc->sc_memsize, /* maxsegsize */ 365 BUS_DMA_WAITOK, /* flags */ 366 NULL, NULL, /* lockfunc, lockarg */ 367 &lesc->sc_dmat); 368 if (error != 0) { 369 device_printf(dev, "cannot allocate buffer DMA tag\n"); 370 goto fail_ires; 371 } 372 373 error = bus_dmamem_alloc(lesc->sc_dmat, (void **)&sc->sc_mem, 374 BUS_DMA_WAITOK | BUS_DMA_COHERENT, &lesc->sc_dmam); 375 if (error != 0) { 376 device_printf(dev, "cannot allocate DMA buffer memory\n"); 377 goto fail_dtag; 378 } 379 380 lesc->sc_laddr = 0; 381 error = bus_dmamap_load(lesc->sc_dmat, lesc->sc_dmam, sc->sc_mem, 382 sc->sc_memsize, le_dma_dma_callback, lesc, 0); 383 if (error != 0 || lesc->sc_laddr == 0) { 384 device_printf(dev, "cannot load DMA buffer map\n"); 385 goto fail_dmem; 386 } 387 388 sc->sc_addr = lesc->sc_laddr & 0xffffff; 389 sc->sc_flags = 0; 390 sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON; 391 392 sc->sc_mediachange = le_dma_supmediachange; 393 sc->sc_mediastatus = le_dma_supmediastatus; 394 sc->sc_supmedia = le_dma_supmedia; 395 sc->sc_nsupmedia = sizeof(le_dma_supmedia) / sizeof(le_dma_supmedia[0]); 396 sc->sc_defaultmedia = le_dma_supmedia[0]; 397 398 OF_getetheraddr(dev, sc->sc_enaddr); 399 400 sc->sc_copytodesc = lance_copytobuf_contig; 401 sc->sc_copyfromdesc = lance_copyfrombuf_contig; 402 sc->sc_copytobuf = lance_copytobuf_contig; 403 sc->sc_copyfrombuf = lance_copyfrombuf_contig; 404 sc->sc_zerobuf = lance_zerobuf_contig; 405 406 sc->sc_rdcsr = le_dma_rdcsr; 407 sc->sc_wrcsr = le_dma_wrcsr; 408 sc->sc_nocarrier = le_dma_nocarrier; 409 sc->sc_hwreset = le_dma_hwreset; 410 sc->sc_hwintr = le_dma_hwintr; 411 412 error = am7990_config(&lesc->sc_am7990, device_get_name(dev), 413 device_get_unit(dev)); 414 if (error != 0) { 415 device_printf(dev, "cannot attach AM7990\n"); 416 goto fail_dmap; 417 } 418 419 error = bus_setup_intr(dev, lesc->sc_ires, INTR_TYPE_NET | INTR_MPSAFE, 420 am7990_intr, sc, &lesc->sc_ih); 421 if (error != 0) { 422 device_printf(dev, "cannot set up interrupt\n"); 423 goto fail_am7990; 424 } 425 426 return (0); 427 428 fail_am7990: 429 am7990_detach(&lesc->sc_am7990); 430 fail_dmap: 431 bus_dmamap_unload(lesc->sc_dmat, lesc->sc_dmam); 432 fail_dmem: 433 bus_dmamem_free(lesc->sc_dmat, sc->sc_mem, lesc->sc_dmam); 434 fail_dtag: 435 bus_dma_tag_destroy(lesc->sc_dmat); 436 fail_ires: 437 bus_release_resource(dev, SYS_RES_IRQ, lesc->sc_irid, lesc->sc_ires); 438 fail_rres: 439 bus_release_resource(dev, SYS_RES_MEMORY, lesc->sc_rrid, lesc->sc_rres); 440 fail_mtx: 441 LE_LOCK_DESTROY(sc); 442 return (error); 443} 444 445static int 446le_dma_detach(device_t dev) 447{ 448 struct le_dma_softc *lesc; 449 struct lance_softc *sc; 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 bus_release_resource(dev, SYS_RES_IRQ, lesc->sc_irid, lesc->sc_ires); 460 bus_release_resource(dev, SYS_RES_MEMORY, lesc->sc_rrid, lesc->sc_rres); 461 LE_LOCK_DESTROY(sc); 462 463 return (0); 464} 465 466static int 467le_dma_suspend(device_t dev) 468{ 469 struct le_dma_softc *lesc; 470 471 lesc = device_get_softc(dev); 472 473 lance_suspend(&lesc->sc_am7990.lsc); 474 475 return (0); 476} 477 478static int 479le_dma_resume(device_t dev) 480{ 481 struct le_dma_softc *lesc; 482 483 lesc = device_get_softc(dev); 484 485 lance_resume(&lesc->sc_am7990.lsc); 486 487 return (0); 488} 489