1 /* $NetBSD: sdmmc.c,v 1.12 2012/02/01 22:34:42 matt Exp $ */ 2 /* $OpenBSD: sdmmc.c,v 1.18 2009/01/09 10:58:38 jsg Exp $ */ 3 4 /* 5 * Copyright (c) 2006 Uwe Stuehler <uwe@openbsd.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /*- 21 * Copyright (C) 2007, 2008, 2009 NONAKA Kimihiro <nonaka@netbsd.org> 22 * All rights reserved. 23 * 24 * Redistribution and use in source and binary forms, with or without 25 * modification, are permitted provided that the following conditions 26 * are met: 27 * 1. Redistributions of source code must retain the above copyright 28 * notice, this list of conditions and the following disclaimer. 29 * 2. Redistributions in binary form must reproduce the above copyright 30 * notice, this list of conditions and the following disclaimer in the 31 * documentation and/or other materials provided with the distribution. 32 * 33 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 34 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 35 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 36 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 37 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 38 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 39 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 40 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 41 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 42 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 43 */ 44 45 /* 46 * Host controller independent SD/MMC bus driver based on information 47 * from SanDisk SD Card Product Manual Revision 2.2 (SanDisk), SDIO 48 * Simple Specification Version 1.0 (SDIO) and the Linux "mmc" driver. 49 */ 50 51 #include <sys/cdefs.h> 52 __KERNEL_RCSID(0, "$NetBSD: sdmmc.c,v 1.12 2012/02/01 22:34:42 matt Exp $"); 53 54 #ifdef _KERNEL_OPT 55 #include "opt_sdmmc.h" 56 #endif 57 58 #include <sys/param.h> 59 #include <sys/device.h> 60 #include <sys/kernel.h> 61 #include <sys/kthread.h> 62 #include <sys/malloc.h> 63 #include <sys/proc.h> 64 #include <sys/systm.h> 65 #include <sys/callout.h> 66 67 #include <machine/vmparam.h> 68 69 #include <dev/sdmmc/sdmmc_ioreg.h> 70 #include <dev/sdmmc/sdmmcchip.h> 71 #include <dev/sdmmc/sdmmcreg.h> 72 #include <dev/sdmmc/sdmmcvar.h> 73 74 #ifdef SDMMC_DEBUG 75 int sdmmcdebug = 1; 76 static void sdmmc_dump_command(struct sdmmc_softc *, struct sdmmc_command *); 77 #define DPRINTF(n,s) do { if ((n) <= sdmmcdebug) printf s; } while (0) 78 #else 79 #define DPRINTF(n,s) do {} while (0) 80 #endif 81 82 #define DEVNAME(sc) SDMMCDEVNAME(sc) 83 84 static int sdmmc_match(device_t, cfdata_t, void *); 85 static void sdmmc_attach(device_t, device_t, void *); 86 static int sdmmc_detach(device_t, int); 87 88 CFATTACH_DECL_NEW(sdmmc, sizeof(struct sdmmc_softc), 89 sdmmc_match, sdmmc_attach, sdmmc_detach, NULL); 90 91 static void sdmmc_doattach(device_t); 92 static void sdmmc_task_thread(void *); 93 static void sdmmc_discover_task(void *); 94 static void sdmmc_polling_card(void *); 95 static void sdmmc_card_attach(struct sdmmc_softc *); 96 static void sdmmc_card_detach(struct sdmmc_softc *, int); 97 static int sdmmc_print(void *, const char *); 98 static int sdmmc_enable(struct sdmmc_softc *); 99 static void sdmmc_disable(struct sdmmc_softc *); 100 static int sdmmc_scan(struct sdmmc_softc *); 101 static int sdmmc_init(struct sdmmc_softc *); 102 103 static int 104 sdmmc_match(device_t parent, cfdata_t cf, void *aux) 105 { 106 struct sdmmcbus_attach_args *saa = (struct sdmmcbus_attach_args *)aux; 107 108 if (strcmp(saa->saa_busname, cf->cf_name) == 0) 109 return 1; 110 return 0; 111 } 112 113 static void 114 sdmmc_attach(device_t parent, device_t self, void *aux) 115 { 116 struct sdmmc_softc *sc = device_private(self); 117 struct sdmmcbus_attach_args *saa = (struct sdmmcbus_attach_args *)aux; 118 int error; 119 120 aprint_normal("\n"); 121 aprint_naive("\n"); 122 123 sc->sc_dev = self; 124 sc->sc_sct = saa->saa_sct; 125 sc->sc_spi_sct = saa->saa_spi_sct; 126 sc->sc_sch = saa->saa_sch; 127 sc->sc_dmat = saa->saa_dmat; 128 sc->sc_clkmin = saa->saa_clkmin; 129 sc->sc_clkmax = saa->saa_clkmax; 130 sc->sc_busclk = sc->sc_clkmax; 131 sc->sc_buswidth = 1; 132 sc->sc_caps = saa->saa_caps; 133 134 if (ISSET(sc->sc_caps, SMC_CAPS_DMA)) { 135 error = bus_dmamap_create(sc->sc_dmat, MAXPHYS, SDMMC_MAXNSEGS, 136 MAXPHYS, 0, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW, &sc->sc_dmap); 137 if (error) { 138 aprint_error_dev(sc->sc_dev, 139 "couldn't create dma map. (error=%d)\n", error); 140 return; 141 } 142 } 143 144 if (ISSET(sc->sc_caps, SMC_CAPS_POLL_CARD_DET)) { 145 callout_init(&sc->sc_card_detect_ch, 0); 146 callout_reset(&sc->sc_card_detect_ch, hz, 147 sdmmc_polling_card, sc); 148 } 149 150 SIMPLEQ_INIT(&sc->sf_head); 151 TAILQ_INIT(&sc->sc_tskq); 152 TAILQ_INIT(&sc->sc_intrq); 153 154 sdmmc_init_task(&sc->sc_discover_task, sdmmc_discover_task, sc); 155 sdmmc_init_task(&sc->sc_intr_task, sdmmc_intr_task, sc); 156 157 mutex_init(&sc->sc_mtx, MUTEX_DEFAULT, IPL_SDMMC); 158 mutex_init(&sc->sc_tskq_mtx, MUTEX_DEFAULT, IPL_SDMMC); 159 mutex_init(&sc->sc_discover_task_mtx, MUTEX_DEFAULT, IPL_SDMMC); 160 mutex_init(&sc->sc_intr_task_mtx, MUTEX_DEFAULT, IPL_SDMMC); 161 cv_init(&sc->sc_tskq_cv, "mmctaskq"); 162 163 if (!pmf_device_register(self, NULL, NULL)) { 164 aprint_error_dev(self, "couldn't establish power handler\n"); 165 } 166 167 SET(sc->sc_flags, SMF_INITED); 168 169 /* 170 * Create the event thread that will attach and detach cards 171 * and perform other lengthy operations. 172 */ 173 config_pending_incr(); 174 config_interrupts(self, sdmmc_doattach); 175 } 176 177 static int 178 sdmmc_detach(device_t self, int flags) 179 { 180 struct sdmmc_softc *sc = device_private(self); 181 int error; 182 183 mutex_enter(&sc->sc_tskq_mtx); 184 sc->sc_dying = 1; 185 cv_signal(&sc->sc_tskq_cv); 186 while (sc->sc_tskq_lwp != NULL) 187 cv_wait(&sc->sc_tskq_cv, &sc->sc_tskq_mtx); 188 mutex_exit(&sc->sc_tskq_mtx); 189 190 pmf_device_deregister(self); 191 192 error = config_detach_children(self, flags); 193 if (error) 194 return error; 195 return 0; 196 } 197 198 static void 199 sdmmc_doattach(device_t dev) 200 { 201 struct sdmmc_softc *sc = device_private(dev); 202 203 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 204 sdmmc_task_thread, sc, &sc->sc_tskq_lwp, "%s", device_xname(dev))) { 205 aprint_error_dev(dev, "couldn't create task thread\n"); 206 } 207 } 208 209 void 210 sdmmc_add_task(struct sdmmc_softc *sc, struct sdmmc_task *task) 211 { 212 213 mutex_enter(&sc->sc_tskq_mtx); 214 task->onqueue = 1; 215 task->sc = sc; 216 TAILQ_INSERT_TAIL(&sc->sc_tskq, task, next); 217 cv_broadcast(&sc->sc_tskq_cv); 218 mutex_exit(&sc->sc_tskq_mtx); 219 } 220 221 static inline void 222 sdmmc_del_task1(struct sdmmc_softc *sc, struct sdmmc_task *task) 223 { 224 225 TAILQ_REMOVE(&sc->sc_tskq, task, next); 226 task->sc = NULL; 227 task->onqueue = 0; 228 } 229 230 void 231 sdmmc_del_task(struct sdmmc_task *task) 232 { 233 struct sdmmc_softc *sc = (struct sdmmc_softc *)task->sc; 234 235 if (sc != NULL) { 236 mutex_enter(&sc->sc_tskq_mtx); 237 sdmmc_del_task1(sc, task); 238 mutex_exit(&sc->sc_tskq_mtx); 239 } 240 } 241 242 static void 243 sdmmc_task_thread(void *arg) 244 { 245 struct sdmmc_softc *sc = (struct sdmmc_softc *)arg; 246 struct sdmmc_task *task; 247 248 sdmmc_discover_task(sc); 249 config_pending_decr(); 250 251 mutex_enter(&sc->sc_tskq_mtx); 252 for (;;) { 253 task = TAILQ_FIRST(&sc->sc_tskq); 254 if (task != NULL) { 255 sdmmc_del_task1(sc, task); 256 mutex_exit(&sc->sc_tskq_mtx); 257 (*task->func)(task->arg); 258 mutex_enter(&sc->sc_tskq_mtx); 259 } else { 260 /* Check for the exit condition. */ 261 if (sc->sc_dying) 262 break; 263 cv_wait(&sc->sc_tskq_cv, &sc->sc_tskq_mtx); 264 } 265 } 266 /* time to die. */ 267 sc->sc_dying = 0; 268 if (ISSET(sc->sc_flags, SMF_CARD_PRESENT)) 269 sdmmc_card_detach(sc, DETACH_FORCE); 270 sc->sc_tskq_lwp = NULL; 271 cv_broadcast(&sc->sc_tskq_cv); 272 mutex_exit(&sc->sc_tskq_mtx); 273 kthread_exit(0); 274 } 275 276 void 277 sdmmc_needs_discover(device_t dev) 278 { 279 struct sdmmc_softc *sc = device_private(dev); 280 281 if (!ISSET(sc->sc_flags, SMF_INITED)) 282 return; 283 284 mutex_enter(&sc->sc_discover_task_mtx); 285 if (!sdmmc_task_pending(&sc->sc_discover_task)) 286 sdmmc_add_task(sc, &sc->sc_discover_task); 287 mutex_exit(&sc->sc_discover_task_mtx); 288 } 289 290 static void 291 sdmmc_discover_task(void *arg) 292 { 293 struct sdmmc_softc *sc = (struct sdmmc_softc *)arg; 294 295 if (sdmmc_chip_card_detect(sc->sc_sct, sc->sc_sch)) { 296 if (!ISSET(sc->sc_flags, SMF_CARD_PRESENT)) { 297 SET(sc->sc_flags, SMF_CARD_PRESENT); 298 sdmmc_card_attach(sc); 299 if (!ISSET(sc->sc_flags, SMF_CARD_ATTACHED)) 300 CLR(sc->sc_flags, SMF_CARD_PRESENT); 301 } 302 } else { 303 if (ISSET(sc->sc_flags, SMF_CARD_PRESENT)) { 304 CLR(sc->sc_flags, SMF_CARD_PRESENT); 305 sdmmc_card_detach(sc, DETACH_FORCE); 306 } 307 } 308 } 309 310 static void 311 sdmmc_polling_card(void *arg) 312 { 313 struct sdmmc_softc *sc = (struct sdmmc_softc *)arg; 314 int card_detect; 315 int s; 316 317 s = splsdmmc(); 318 card_detect = sdmmc_chip_card_detect(sc->sc_sct, sc->sc_sch); 319 if (card_detect) { 320 if (!ISSET(sc->sc_flags, SMF_CARD_PRESENT)) { 321 sdmmc_needs_discover(sc->sc_dev); 322 } 323 } else { 324 if (ISSET(sc->sc_flags, SMF_CARD_PRESENT)) { 325 sdmmc_needs_discover(sc->sc_dev); 326 } 327 } 328 splx(s); 329 330 callout_schedule(&sc->sc_card_detect_ch, hz); 331 } 332 333 /* 334 * Called from process context when a card is present. 335 */ 336 static void 337 sdmmc_card_attach(struct sdmmc_softc *sc) 338 { 339 struct sdmmc_function *sf; 340 struct sdmmc_attach_args saa; 341 int error; 342 343 DPRINTF(1,("%s: attach card\n", DEVNAME(sc))); 344 345 CLR(sc->sc_flags, SMF_CARD_ATTACHED); 346 347 /* 348 * Power up the card (or card stack). 349 */ 350 error = sdmmc_enable(sc); 351 if (error) { 352 if (!ISSET(sc->sc_caps, SMC_CAPS_POLL_CARD_DET)) { 353 aprint_error_dev(sc->sc_dev, "couldn't enable card: %d\n", error); 354 } 355 goto err; 356 } 357 358 /* 359 * Scan for I/O functions and memory cards on the bus, 360 * allocating a sdmmc_function structure for each. 361 */ 362 error = sdmmc_scan(sc); 363 if (error) { 364 aprint_error_dev(sc->sc_dev, "no functions\n"); 365 goto err; 366 } 367 368 /* 369 * Initialize the I/O functions and memory cards. 370 */ 371 error = sdmmc_init(sc); 372 if (error) { 373 aprint_error_dev(sc->sc_dev, "init failed\n"); 374 goto err; 375 } 376 377 SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list) { 378 if (ISSET(sc->sc_flags, SMF_IO_MODE) && sf->number < 1) 379 continue; 380 381 memset(&saa, 0, sizeof saa); 382 saa.manufacturer = sf->cis.manufacturer; 383 saa.product = sf->cis.product; 384 saa.interface = sf->interface; 385 saa.sf = sf; 386 387 sf->child = 388 config_found_ia(sc->sc_dev, "sdmmc", &saa, sdmmc_print); 389 } 390 391 SET(sc->sc_flags, SMF_CARD_ATTACHED); 392 return; 393 394 err: 395 sdmmc_card_detach(sc, DETACH_FORCE); 396 } 397 398 /* 399 * Called from process context with DETACH_* flags from <sys/device.h> 400 * when cards are gone. 401 */ 402 static void 403 sdmmc_card_detach(struct sdmmc_softc *sc, int flags) 404 { 405 struct sdmmc_function *sf, *sfnext; 406 407 DPRINTF(1,("%s: detach card\n", DEVNAME(sc))); 408 409 if (ISSET(sc->sc_flags, SMF_CARD_ATTACHED)) { 410 SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list) { 411 if (sf->child != NULL) { 412 config_detach(sf->child, DETACH_FORCE); 413 sf->child = NULL; 414 } 415 } 416 417 KASSERT(TAILQ_EMPTY(&sc->sc_intrq)); 418 419 CLR(sc->sc_flags, SMF_CARD_ATTACHED); 420 } 421 422 /* Power down. */ 423 sdmmc_disable(sc); 424 425 /* Free all sdmmc_function structures. */ 426 for (sf = SIMPLEQ_FIRST(&sc->sf_head); sf != NULL; sf = sfnext) { 427 sfnext = SIMPLEQ_NEXT(sf, sf_list); 428 sdmmc_function_free(sf); 429 } 430 SIMPLEQ_INIT(&sc->sf_head); 431 sc->sc_function_count = 0; 432 sc->sc_fn0 = NULL; 433 } 434 435 static int 436 sdmmc_print(void *aux, const char *pnp) 437 { 438 struct sdmmc_attach_args *sa = aux; 439 struct sdmmc_function *sf = sa->sf; 440 struct sdmmc_cis *cis = &sf->sc->sc_fn0->cis; 441 int i; 442 443 if (pnp) { 444 if (sf->number == 0) 445 return QUIET; 446 447 for (i = 0; i < 4 && cis->cis1_info[i]; i++) 448 printf("%s%s", i ? ", " : "\"", cis->cis1_info[i]); 449 if (i != 0) 450 printf("\""); 451 452 if (cis->manufacturer != SDMMC_VENDOR_INVALID && 453 cis->product != SDMMC_PRODUCT_INVALID) { 454 printf("%s(", i ? " " : ""); 455 if (cis->manufacturer != SDMMC_VENDOR_INVALID) 456 printf("manufacturer 0x%x%s", 457 cis->manufacturer, 458 cis->product == SDMMC_PRODUCT_INVALID ? 459 "" : ", "); 460 if (cis->product != SDMMC_PRODUCT_INVALID) 461 printf("product 0x%x", cis->product); 462 printf(")"); 463 } 464 printf("%sat %s", i ? " " : "", pnp); 465 } 466 if (sf->number > 0) 467 printf(" function %d", sf->number); 468 469 if (!pnp) { 470 for (i = 0; i < 3 && cis->cis1_info[i]; i++) 471 printf("%s%s", i ? ", " : " \"", cis->cis1_info[i]); 472 if (i != 0) 473 printf("\""); 474 } 475 return UNCONF; 476 } 477 478 static int 479 sdmmc_enable(struct sdmmc_softc *sc) 480 { 481 int error; 482 483 /* 484 * Calculate the equivalent of the card OCR from the host 485 * capabilities and select the maximum supported bus voltage. 486 */ 487 error = sdmmc_chip_bus_power(sc->sc_sct, sc->sc_sch, 488 sdmmc_chip_host_ocr(sc->sc_sct, sc->sc_sch)); 489 if (error) { 490 aprint_error_dev(sc->sc_dev, "couldn't supply bus power\n"); 491 goto out; 492 } 493 494 /* 495 * Select the minimum clock frequency. 496 */ 497 error = sdmmc_chip_bus_clock(sc->sc_sct, sc->sc_sch, SDMMC_SDCLK_400K); 498 if (error) { 499 aprint_error_dev(sc->sc_dev, "couldn't supply clock\n"); 500 goto out; 501 } 502 503 /* XXX wait for card to power up */ 504 sdmmc_delay(100000); 505 506 if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 507 /* Initialize SD I/O card function(s). */ 508 error = sdmmc_io_enable(sc); 509 if (error) 510 goto out; 511 } 512 513 /* Initialize SD/MMC memory card(s). */ 514 if (ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE) || 515 ISSET(sc->sc_flags, SMF_MEM_MODE)) 516 error = sdmmc_mem_enable(sc); 517 518 out: 519 if (error) 520 sdmmc_disable(sc); 521 return error; 522 } 523 524 static void 525 sdmmc_disable(struct sdmmc_softc *sc) 526 { 527 /* XXX complete commands if card is still present. */ 528 529 if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 530 /* Make sure no card is still selected. */ 531 (void)sdmmc_select_card(sc, NULL); 532 } 533 534 /* Turn off bus power and clock. */ 535 (void)sdmmc_chip_bus_width(sc->sc_sct, sc->sc_sch, 1); 536 (void)sdmmc_chip_bus_clock(sc->sc_sct, sc->sc_sch, SDMMC_SDCLK_OFF); 537 (void)sdmmc_chip_bus_power(sc->sc_sct, sc->sc_sch, 0); 538 sc->sc_busclk = sc->sc_clkmax; 539 } 540 541 /* 542 * Set the lowest bus voltage supported by the card and the host. 543 */ 544 int 545 sdmmc_set_bus_power(struct sdmmc_softc *sc, uint32_t host_ocr, 546 uint32_t card_ocr) 547 { 548 uint32_t bit; 549 550 /* Mask off unsupported voltage levels and select the lowest. */ 551 DPRINTF(1,("%s: host_ocr=%x ", DEVNAME(sc), host_ocr)); 552 host_ocr &= card_ocr; 553 for (bit = 4; bit < 23; bit++) { 554 if (ISSET(host_ocr, (1 << bit))) { 555 host_ocr &= (3 << bit); 556 break; 557 } 558 } 559 DPRINTF(1,("card_ocr=%x new_ocr=%x\n", card_ocr, host_ocr)); 560 561 if (host_ocr == 0 || 562 sdmmc_chip_bus_power(sc->sc_sct, sc->sc_sch, host_ocr) != 0) 563 return 1; 564 return 0; 565 } 566 567 struct sdmmc_function * 568 sdmmc_function_alloc(struct sdmmc_softc *sc) 569 { 570 struct sdmmc_function *sf; 571 572 sf = malloc(sizeof *sf, M_DEVBUF, M_WAITOK|M_ZERO); 573 if (sf == NULL) { 574 aprint_error_dev(sc->sc_dev, 575 "couldn't alloc memory (sdmmc function)\n"); 576 return NULL; 577 } 578 579 sf->sc = sc; 580 sf->number = -1; 581 sf->cis.manufacturer = SDMMC_VENDOR_INVALID; 582 sf->cis.product = SDMMC_PRODUCT_INVALID; 583 sf->cis.function = SDMMC_FUNCTION_INVALID; 584 sf->width = 1; 585 586 if (ISSET(sc->sc_flags, SMF_MEM_MODE) && 587 ISSET(sc->sc_caps, SMC_CAPS_DMA) && 588 !ISSET(sc->sc_caps, SMC_CAPS_MULTI_SEG_DMA)) { 589 bus_dma_segment_t ds; 590 int rseg, error; 591 592 error = bus_dmamap_create(sc->sc_dmat, SDMMC_SECTOR_SIZE, 1, 593 SDMMC_SECTOR_SIZE, 0, BUS_DMA_WAITOK, &sf->bbuf_dmap); 594 if (error) 595 goto fail1; 596 error = bus_dmamem_alloc(sc->sc_dmat, SDMMC_SECTOR_SIZE, 597 PAGE_SIZE, 0, &ds, 1, &rseg, BUS_DMA_WAITOK); 598 if (error) 599 goto fail2; 600 error = bus_dmamem_map(sc->sc_dmat, &ds, 1, SDMMC_SECTOR_SIZE, 601 &sf->bbuf, BUS_DMA_WAITOK); 602 if (error) 603 goto fail3; 604 error = bus_dmamap_load(sc->sc_dmat, sf->bbuf_dmap, 605 sf->bbuf, SDMMC_SECTOR_SIZE, NULL, 606 BUS_DMA_WAITOK|BUS_DMA_READ|BUS_DMA_WRITE); 607 if (!error) 608 goto out; 609 610 bus_dmamem_unmap(sc->sc_dmat, sf->bbuf, SDMMC_SECTOR_SIZE); 611 fail3: 612 bus_dmamem_free(sc->sc_dmat, &ds, 1); 613 fail2: 614 bus_dmamap_destroy(sc->sc_dmat, sf->bbuf_dmap); 615 fail1: 616 free(sf, M_DEVBUF); 617 sf = NULL; 618 } 619 out: 620 621 return sf; 622 } 623 624 void 625 sdmmc_function_free(struct sdmmc_function *sf) 626 { 627 struct sdmmc_softc *sc = sf->sc; 628 629 if (ISSET(sc->sc_flags, SMF_MEM_MODE) && 630 ISSET(sc->sc_caps, SMC_CAPS_DMA) && 631 !ISSET(sc->sc_caps, SMC_CAPS_MULTI_SEG_DMA)) { 632 bus_dmamap_unload(sc->sc_dmat, sf->bbuf_dmap); 633 bus_dmamem_unmap(sc->sc_dmat, sf->bbuf, SDMMC_SECTOR_SIZE); 634 bus_dmamem_free(sc->sc_dmat, 635 sf->bbuf_dmap->dm_segs, sf->bbuf_dmap->dm_nsegs); 636 bus_dmamap_destroy(sc->sc_dmat, sf->bbuf_dmap); 637 } 638 639 free(sf, M_DEVBUF); 640 } 641 642 /* 643 * Scan for I/O functions and memory cards on the bus, allocating a 644 * sdmmc_function structure for each. 645 */ 646 static int 647 sdmmc_scan(struct sdmmc_softc *sc) 648 { 649 650 if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 651 /* Scan for I/O functions. */ 652 if (ISSET(sc->sc_flags, SMF_IO_MODE)) 653 sdmmc_io_scan(sc); 654 } 655 656 /* Scan for memory cards on the bus. */ 657 if (ISSET(sc->sc_flags, SMF_MEM_MODE)) 658 sdmmc_mem_scan(sc); 659 660 /* There should be at least one function now. */ 661 if (SIMPLEQ_EMPTY(&sc->sf_head)) { 662 aprint_error_dev(sc->sc_dev, "couldn't identify card\n"); 663 return 1; 664 } 665 return 0; 666 } 667 668 /* 669 * Initialize all the distinguished functions of the card, be it I/O 670 * or memory functions. 671 */ 672 static int 673 sdmmc_init(struct sdmmc_softc *sc) 674 { 675 struct sdmmc_function *sf; 676 677 /* Initialize all identified card functions. */ 678 SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list) { 679 if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 680 if (ISSET(sc->sc_flags, SMF_IO_MODE) && 681 sdmmc_io_init(sc, sf) != 0) { 682 aprint_error_dev(sc->sc_dev, 683 "i/o init failed\n"); 684 } 685 } 686 687 if (ISSET(sc->sc_flags, SMF_MEM_MODE) && 688 sdmmc_mem_init(sc, sf) != 0) { 689 aprint_error_dev(sc->sc_dev, "mem init failed\n"); 690 } 691 } 692 693 /* Any good functions left after initialization? */ 694 SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list) { 695 if (!ISSET(sf->flags, SFF_ERROR)) 696 return 0; 697 } 698 699 /* No, we should probably power down the card. */ 700 return 1; 701 } 702 703 void 704 sdmmc_delay(u_int usecs) 705 { 706 707 delay(usecs); 708 } 709 710 int 711 sdmmc_app_command(struct sdmmc_softc *sc, struct sdmmc_function *sf, struct sdmmc_command *cmd) 712 { 713 struct sdmmc_command acmd; 714 int error; 715 716 DPRINTF(1,("sdmmc_app_command: start\n")); 717 718 /* Don't lock */ 719 720 memset(&acmd, 0, sizeof(acmd)); 721 acmd.c_opcode = MMC_APP_CMD; 722 if (sf != NULL) { 723 acmd.c_arg = sf->rca << 16; 724 acmd.c_flags = SCF_CMD_AC | SCF_RSP_R1 | SCF_RSP_SPI_R1; 725 } else { 726 acmd.c_arg = 0; 727 acmd.c_flags = SCF_CMD_BCR | SCF_RSP_R1 | SCF_RSP_SPI_R1; 728 } 729 730 error = sdmmc_mmc_command(sc, &acmd); 731 if (error == 0) { 732 if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE) && 733 !ISSET(MMC_R1(acmd.c_resp), MMC_R1_APP_CMD)) { 734 /* Card does not support application commands. */ 735 error = ENODEV; 736 } else { 737 error = sdmmc_mmc_command(sc, cmd); 738 } 739 } 740 DPRINTF(1,("sdmmc_app_command: done (error=%d)\n", error)); 741 return error; 742 } 743 744 /* 745 * Execute MMC command and data transfers. All interactions with the 746 * host controller to complete the command happen in the context of 747 * the current process. 748 */ 749 int 750 sdmmc_mmc_command(struct sdmmc_softc *sc, struct sdmmc_command *cmd) 751 { 752 int error; 753 754 DPRINTF(1,("sdmmc_mmc_command: cmd=%d, arg=%#x, flags=%#x\n", 755 cmd->c_opcode, cmd->c_arg, cmd->c_flags)); 756 757 /* Don't lock */ 758 759 #if defined(DIAGNOSTIC) || defined(SDMMC_DEBUG) 760 if (cmd->c_data && !ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 761 if (sc->sc_card == NULL) 762 panic("%s: deselected card\n", DEVNAME(sc)); 763 } 764 #endif 765 766 sdmmc_chip_exec_command(sc->sc_sct, sc->sc_sch, cmd); 767 768 #ifdef SDMMC_DEBUG 769 sdmmc_dump_command(sc, cmd); 770 #endif 771 772 error = cmd->c_error; 773 774 DPRINTF(1,("sdmmc_mmc_command: error=%d\n", error)); 775 776 return error; 777 } 778 779 /* 780 * Send the "GO IDLE STATE" command. 781 */ 782 void 783 sdmmc_go_idle_state(struct sdmmc_softc *sc) 784 { 785 struct sdmmc_command cmd; 786 787 DPRINTF(1,("sdmmc_go_idle_state\n")); 788 789 /* Don't lock */ 790 791 memset(&cmd, 0, sizeof(cmd)); 792 cmd.c_opcode = MMC_GO_IDLE_STATE; 793 cmd.c_flags = SCF_CMD_BC | SCF_RSP_R0 | SCF_RSP_SPI_R1; 794 795 (void)sdmmc_mmc_command(sc, &cmd); 796 } 797 798 /* 799 * Retrieve (SD) or set (MMC) the relative card address (RCA). 800 */ 801 int 802 sdmmc_set_relative_addr(struct sdmmc_softc *sc, struct sdmmc_function *sf) 803 { 804 struct sdmmc_command cmd; 805 int error; 806 807 /* Don't lock */ 808 809 if (ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) 810 return EIO; 811 812 memset(&cmd, 0, sizeof(cmd)); 813 if (ISSET(sc->sc_flags, SMF_SD_MODE)) { 814 cmd.c_opcode = SD_SEND_RELATIVE_ADDR; 815 cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R6; 816 } else { 817 cmd.c_opcode = MMC_SET_RELATIVE_ADDR; 818 cmd.c_arg = MMC_ARG_RCA(sf->rca); 819 cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1; 820 } 821 error = sdmmc_mmc_command(sc, &cmd); 822 if (error) 823 return error; 824 825 if (ISSET(sc->sc_flags, SMF_SD_MODE)) 826 sf->rca = SD_R6_RCA(cmd.c_resp); 827 828 return 0; 829 } 830 831 int 832 sdmmc_select_card(struct sdmmc_softc *sc, struct sdmmc_function *sf) 833 { 834 struct sdmmc_command cmd; 835 int error; 836 837 /* Don't lock */ 838 839 if (ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) 840 return EIO; 841 842 if (sc->sc_card == sf 843 || (sf && sc->sc_card && sc->sc_card->rca == sf->rca)) { 844 sc->sc_card = sf; 845 return 0; 846 } 847 848 memset(&cmd, 0, sizeof(cmd)); 849 cmd.c_opcode = MMC_SELECT_CARD; 850 cmd.c_arg = (sf == NULL) ? 0 : MMC_ARG_RCA(sf->rca); 851 cmd.c_flags = SCF_CMD_AC | ((sf == NULL) ? SCF_RSP_R0 : SCF_RSP_R1); 852 error = sdmmc_mmc_command(sc, &cmd); 853 if (error == 0 || sf == NULL) 854 sc->sc_card = sf; 855 856 return error; 857 } 858 859 #ifdef SDMMC_DEBUG 860 static void 861 sdmmc_dump_command(struct sdmmc_softc *sc, struct sdmmc_command *cmd) 862 { 863 int i; 864 865 DPRINTF(1,("%s: cmd %u arg=%#x data=%p dlen=%d flags=%#x (error %d)\n", 866 DEVNAME(sc), cmd->c_opcode, cmd->c_arg, cmd->c_data, 867 cmd->c_datalen, cmd->c_flags, cmd->c_error)); 868 869 if (cmd->c_error || sdmmcdebug < 1) 870 return; 871 872 aprint_normal_dev(sc->sc_dev, "resp="); 873 if (ISSET(cmd->c_flags, SCF_RSP_136)) 874 for (i = 0; i < sizeof cmd->c_resp; i++) 875 aprint_normal("%02x ", ((uint8_t *)cmd->c_resp)[i]); 876 else if (ISSET(cmd->c_flags, SCF_RSP_PRESENT)) 877 for (i = 0; i < 4; i++) 878 aprint_normal("%02x ", ((uint8_t *)cmd->c_resp)[i]); 879 else 880 aprint_normal("none"); 881 aprint_normal("\n"); 882 } 883 884 void 885 sdmmc_dump_data(const char *title, void *ptr, size_t size) 886 { 887 char buf[16]; 888 uint8_t *p = ptr; 889 int i, j; 890 891 printf("sdmmc_dump_data: %s\n", title ? title : ""); 892 printf("--------+--------------------------------------------------+------------------+\n"); 893 printf("offset | +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +a +b +c +d +e +f | data |\n"); 894 printf("--------+--------------------------------------------------+------------------+\n"); 895 for (i = 0; i < (int)size; i++) { 896 if ((i % 16) == 0) { 897 printf("%08x| ", i); 898 } else if ((i % 16) == 8) { 899 printf(" "); 900 } 901 902 printf("%02x ", p[i]); 903 buf[i % 16] = p[i]; 904 905 if ((i % 16) == 15) { 906 printf("| "); 907 for (j = 0; j < 16; j++) { 908 if (buf[j] >= 0x20 && buf[j] <= 0x7e) { 909 printf("%c", buf[j]); 910 } else { 911 printf("."); 912 } 913 } 914 printf(" |\n"); 915 } 916 } 917 if ((i % 16) != 0) { 918 j = (i % 16); 919 for (; j < 16; j++) { 920 printf(" "); 921 if ((j % 16) == 8) { 922 printf(" "); 923 } 924 } 925 926 printf("| "); 927 for (j = 0; j < (i % 16); j++) { 928 if (buf[j] >= 0x20 && buf[j] <= 0x7e) { 929 printf("%c", buf[j]); 930 } else { 931 printf("."); 932 } 933 } 934 for (; j < 16; j++) { 935 printf(" "); 936 } 937 printf(" |\n"); 938 } 939 printf("--------+--------------------------------------------------+------------------+\n"); 940 } 941 #endif 942