1 /* $NetBSD: sdmmc.c,v 1.15 2012/08/04 04:06:00 kiyohara 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 1.15 2012/08/04 04:06:00 kiyohara 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; 195 196 if (ISSET(sc->sc_caps, SMC_CAPS_DMA)) { 197 bus_dmamap_unload(sc->sc_dmat, sc->sc_dmap); 198 bus_dmamap_destroy(sc->sc_dmat, sc->sc_dmap); 199 } 200 201 return 0; 202 } 203 204 static void 205 sdmmc_doattach(device_t dev) 206 { 207 struct sdmmc_softc *sc = device_private(dev); 208 209 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 210 sdmmc_task_thread, sc, &sc->sc_tskq_lwp, "%s", device_xname(dev))) { 211 aprint_error_dev(dev, "couldn't create task thread\n"); 212 } 213 } 214 215 void 216 sdmmc_add_task(struct sdmmc_softc *sc, struct sdmmc_task *task) 217 { 218 219 mutex_enter(&sc->sc_tskq_mtx); 220 task->onqueue = 1; 221 task->sc = sc; 222 TAILQ_INSERT_TAIL(&sc->sc_tskq, task, next); 223 cv_broadcast(&sc->sc_tskq_cv); 224 mutex_exit(&sc->sc_tskq_mtx); 225 } 226 227 static inline void 228 sdmmc_del_task1(struct sdmmc_softc *sc, struct sdmmc_task *task) 229 { 230 231 TAILQ_REMOVE(&sc->sc_tskq, task, next); 232 task->sc = NULL; 233 task->onqueue = 0; 234 } 235 236 void 237 sdmmc_del_task(struct sdmmc_task *task) 238 { 239 struct sdmmc_softc *sc = (struct sdmmc_softc *)task->sc; 240 241 if (sc != NULL) { 242 mutex_enter(&sc->sc_tskq_mtx); 243 sdmmc_del_task1(sc, task); 244 mutex_exit(&sc->sc_tskq_mtx); 245 } 246 } 247 248 static void 249 sdmmc_task_thread(void *arg) 250 { 251 struct sdmmc_softc *sc = (struct sdmmc_softc *)arg; 252 struct sdmmc_task *task; 253 254 sdmmc_discover_task(sc); 255 config_pending_decr(); 256 257 mutex_enter(&sc->sc_tskq_mtx); 258 for (;;) { 259 task = TAILQ_FIRST(&sc->sc_tskq); 260 if (task != NULL) { 261 sdmmc_del_task1(sc, task); 262 mutex_exit(&sc->sc_tskq_mtx); 263 (*task->func)(task->arg); 264 mutex_enter(&sc->sc_tskq_mtx); 265 } else { 266 /* Check for the exit condition. */ 267 if (sc->sc_dying) 268 break; 269 cv_wait(&sc->sc_tskq_cv, &sc->sc_tskq_mtx); 270 } 271 } 272 /* time to die. */ 273 sc->sc_dying = 0; 274 if (ISSET(sc->sc_flags, SMF_CARD_PRESENT)) 275 sdmmc_card_detach(sc, DETACH_FORCE); 276 sc->sc_tskq_lwp = NULL; 277 cv_broadcast(&sc->sc_tskq_cv); 278 mutex_exit(&sc->sc_tskq_mtx); 279 kthread_exit(0); 280 } 281 282 void 283 sdmmc_needs_discover(device_t dev) 284 { 285 struct sdmmc_softc *sc = device_private(dev); 286 287 if (!ISSET(sc->sc_flags, SMF_INITED)) 288 return; 289 290 mutex_enter(&sc->sc_discover_task_mtx); 291 if (!sdmmc_task_pending(&sc->sc_discover_task)) 292 sdmmc_add_task(sc, &sc->sc_discover_task); 293 mutex_exit(&sc->sc_discover_task_mtx); 294 } 295 296 static void 297 sdmmc_discover_task(void *arg) 298 { 299 struct sdmmc_softc *sc = (struct sdmmc_softc *)arg; 300 301 if (sdmmc_chip_card_detect(sc->sc_sct, sc->sc_sch)) { 302 if (!ISSET(sc->sc_flags, SMF_CARD_PRESENT)) { 303 SET(sc->sc_flags, SMF_CARD_PRESENT); 304 sdmmc_card_attach(sc); 305 if (!ISSET(sc->sc_flags, SMF_CARD_ATTACHED)) 306 CLR(sc->sc_flags, SMF_CARD_PRESENT); 307 } 308 } else { 309 if (ISSET(sc->sc_flags, SMF_CARD_PRESENT)) { 310 CLR(sc->sc_flags, SMF_CARD_PRESENT); 311 sdmmc_card_detach(sc, DETACH_FORCE); 312 } 313 } 314 } 315 316 static void 317 sdmmc_polling_card(void *arg) 318 { 319 struct sdmmc_softc *sc = (struct sdmmc_softc *)arg; 320 int card_detect; 321 int s; 322 323 s = splsdmmc(); 324 card_detect = sdmmc_chip_card_detect(sc->sc_sct, sc->sc_sch); 325 if (card_detect) { 326 if (!ISSET(sc->sc_flags, SMF_CARD_PRESENT)) { 327 sdmmc_needs_discover(sc->sc_dev); 328 } 329 } else { 330 if (ISSET(sc->sc_flags, SMF_CARD_PRESENT)) { 331 sdmmc_needs_discover(sc->sc_dev); 332 } 333 } 334 splx(s); 335 336 callout_schedule(&sc->sc_card_detect_ch, hz); 337 } 338 339 /* 340 * Called from process context when a card is present. 341 */ 342 static void 343 sdmmc_card_attach(struct sdmmc_softc *sc) 344 { 345 struct sdmmc_function *sf; 346 struct sdmmc_attach_args saa; 347 int error; 348 349 DPRINTF(1,("%s: attach card\n", DEVNAME(sc))); 350 351 CLR(sc->sc_flags, SMF_CARD_ATTACHED); 352 353 /* 354 * Power up the card (or card stack). 355 */ 356 error = sdmmc_enable(sc); 357 if (error) { 358 if (!ISSET(sc->sc_caps, SMC_CAPS_POLL_CARD_DET)) { 359 aprint_error_dev(sc->sc_dev, "couldn't enable card: %d\n", error); 360 } 361 goto err; 362 } 363 364 /* 365 * Scan for I/O functions and memory cards on the bus, 366 * allocating a sdmmc_function structure for each. 367 */ 368 error = sdmmc_scan(sc); 369 if (error) { 370 aprint_error_dev(sc->sc_dev, "no functions\n"); 371 goto err; 372 } 373 374 /* 375 * Initialize the I/O functions and memory cards. 376 */ 377 error = sdmmc_init(sc); 378 if (error) { 379 aprint_error_dev(sc->sc_dev, "init failed\n"); 380 goto err; 381 } 382 383 SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list) { 384 if (ISSET(sc->sc_flags, SMF_IO_MODE) && sf->number < 1) 385 continue; 386 387 memset(&saa, 0, sizeof saa); 388 saa.manufacturer = sf->cis.manufacturer; 389 saa.product = sf->cis.product; 390 saa.interface = sf->interface; 391 saa.sf = sf; 392 393 sf->child = 394 config_found_ia(sc->sc_dev, "sdmmc", &saa, sdmmc_print); 395 } 396 397 SET(sc->sc_flags, SMF_CARD_ATTACHED); 398 return; 399 400 err: 401 sdmmc_card_detach(sc, DETACH_FORCE); 402 } 403 404 /* 405 * Called from process context with DETACH_* flags from <sys/device.h> 406 * when cards are gone. 407 */ 408 static void 409 sdmmc_card_detach(struct sdmmc_softc *sc, int flags) 410 { 411 struct sdmmc_function *sf, *sfnext; 412 413 DPRINTF(1,("%s: detach card\n", DEVNAME(sc))); 414 415 if (ISSET(sc->sc_flags, SMF_CARD_ATTACHED)) { 416 SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list) { 417 if (sf->child != NULL) { 418 config_detach(sf->child, DETACH_FORCE); 419 sf->child = NULL; 420 } 421 } 422 423 KASSERT(TAILQ_EMPTY(&sc->sc_intrq)); 424 425 CLR(sc->sc_flags, SMF_CARD_ATTACHED); 426 } 427 428 /* Power down. */ 429 sdmmc_disable(sc); 430 431 /* Free all sdmmc_function structures. */ 432 for (sf = SIMPLEQ_FIRST(&sc->sf_head); sf != NULL; sf = sfnext) { 433 sfnext = SIMPLEQ_NEXT(sf, sf_list); 434 sdmmc_function_free(sf); 435 } 436 SIMPLEQ_INIT(&sc->sf_head); 437 sc->sc_function_count = 0; 438 sc->sc_fn0 = NULL; 439 } 440 441 static int 442 sdmmc_print(void *aux, const char *pnp) 443 { 444 struct sdmmc_attach_args *sa = aux; 445 struct sdmmc_function *sf = sa->sf; 446 struct sdmmc_cis *cis = &sf->sc->sc_fn0->cis; 447 int i, x; 448 449 if (pnp) { 450 if (sf->number == 0) 451 return QUIET; 452 453 for (i = 0; i < 4 && cis->cis1_info[i]; i++) 454 printf("%s%s", i ? ", " : "\"", cis->cis1_info[i]); 455 if (i != 0) 456 printf("\""); 457 458 if ((cis->manufacturer != SDMMC_VENDOR_INVALID && 459 cis->product != SDMMC_PRODUCT_INVALID) || 460 sa->interface != SD_IO_SFIC_NO_STANDARD) { 461 x = !!(cis->manufacturer != SDMMC_VENDOR_INVALID); 462 x += !!(cis->product != SDMMC_PRODUCT_INVALID); 463 x += !!(sa->interface != SD_IO_SFIC_NO_STANDARD); 464 printf("%s(", i ? " " : ""); 465 if (cis->manufacturer != SDMMC_VENDOR_INVALID) 466 printf("manufacturer 0x%x%s", 467 cis->manufacturer, (--x == 0) ? "" : ", "); 468 if (cis->product != SDMMC_PRODUCT_INVALID) 469 printf("product 0x%x%s", 470 cis->product, (--x == 0) ? "" : ", "); 471 if (sa->interface != SD_IO_SFIC_NO_STANDARD) 472 printf("standard function interface code 0x%x", 473 sf->interface); 474 printf(")"); 475 } 476 printf("%sat %s", i ? " " : "", pnp); 477 } 478 if (sf->number > 0) 479 printf(" function %d", sf->number); 480 481 if (!pnp) { 482 for (i = 0; i < 3 && cis->cis1_info[i]; i++) 483 printf("%s%s", i ? ", " : " \"", cis->cis1_info[i]); 484 if (i != 0) 485 printf("\""); 486 } 487 return UNCONF; 488 } 489 490 static int 491 sdmmc_enable(struct sdmmc_softc *sc) 492 { 493 int error; 494 495 /* 496 * Calculate the equivalent of the card OCR from the host 497 * capabilities and select the maximum supported bus voltage. 498 */ 499 error = sdmmc_chip_bus_power(sc->sc_sct, sc->sc_sch, 500 sdmmc_chip_host_ocr(sc->sc_sct, sc->sc_sch)); 501 if (error) { 502 aprint_error_dev(sc->sc_dev, "couldn't supply bus power\n"); 503 goto out; 504 } 505 506 /* 507 * Select the minimum clock frequency. 508 */ 509 error = sdmmc_chip_bus_clock(sc->sc_sct, sc->sc_sch, SDMMC_SDCLK_400K); 510 if (error) { 511 aprint_error_dev(sc->sc_dev, "couldn't supply clock\n"); 512 goto out; 513 } 514 515 /* XXX wait for card to power up */ 516 sdmmc_delay(100000); 517 518 if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 519 /* Initialize SD I/O card function(s). */ 520 error = sdmmc_io_enable(sc); 521 if (error) 522 goto out; 523 } 524 525 /* Initialize SD/MMC memory card(s). */ 526 if (ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE) || 527 ISSET(sc->sc_flags, SMF_MEM_MODE)) 528 error = sdmmc_mem_enable(sc); 529 530 out: 531 if (error) 532 sdmmc_disable(sc); 533 return error; 534 } 535 536 static void 537 sdmmc_disable(struct sdmmc_softc *sc) 538 { 539 /* XXX complete commands if card is still present. */ 540 541 if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 542 /* Make sure no card is still selected. */ 543 (void)sdmmc_select_card(sc, NULL); 544 } 545 546 /* Turn off bus power and clock. */ 547 (void)sdmmc_chip_bus_width(sc->sc_sct, sc->sc_sch, 1); 548 (void)sdmmc_chip_bus_clock(sc->sc_sct, sc->sc_sch, SDMMC_SDCLK_OFF); 549 (void)sdmmc_chip_bus_power(sc->sc_sct, sc->sc_sch, 0); 550 sc->sc_busclk = sc->sc_clkmax; 551 } 552 553 /* 554 * Set the lowest bus voltage supported by the card and the host. 555 */ 556 int 557 sdmmc_set_bus_power(struct sdmmc_softc *sc, uint32_t host_ocr, 558 uint32_t card_ocr) 559 { 560 uint32_t bit; 561 562 /* Mask off unsupported voltage levels and select the lowest. */ 563 DPRINTF(1,("%s: host_ocr=%x ", DEVNAME(sc), host_ocr)); 564 host_ocr &= card_ocr; 565 for (bit = 4; bit < 23; bit++) { 566 if (ISSET(host_ocr, (1 << bit))) { 567 host_ocr &= (3 << bit); 568 break; 569 } 570 } 571 DPRINTF(1,("card_ocr=%x new_ocr=%x\n", card_ocr, host_ocr)); 572 573 if (host_ocr == 0 || 574 sdmmc_chip_bus_power(sc->sc_sct, sc->sc_sch, host_ocr) != 0) 575 return 1; 576 return 0; 577 } 578 579 struct sdmmc_function * 580 sdmmc_function_alloc(struct sdmmc_softc *sc) 581 { 582 struct sdmmc_function *sf; 583 584 sf = malloc(sizeof *sf, M_DEVBUF, M_WAITOK|M_ZERO); 585 if (sf == NULL) { 586 aprint_error_dev(sc->sc_dev, 587 "couldn't alloc memory (sdmmc function)\n"); 588 return NULL; 589 } 590 591 sf->sc = sc; 592 sf->number = -1; 593 sf->cis.manufacturer = SDMMC_VENDOR_INVALID; 594 sf->cis.product = SDMMC_PRODUCT_INVALID; 595 sf->cis.function = SDMMC_FUNCTION_INVALID; 596 sf->width = 1; 597 598 if (ISSET(sc->sc_flags, SMF_MEM_MODE) && 599 ISSET(sc->sc_caps, SMC_CAPS_DMA) && 600 !ISSET(sc->sc_caps, SMC_CAPS_MULTI_SEG_DMA)) { 601 bus_dma_segment_t ds; 602 int rseg, error; 603 604 error = bus_dmamap_create(sc->sc_dmat, SDMMC_SECTOR_SIZE, 1, 605 SDMMC_SECTOR_SIZE, 0, BUS_DMA_WAITOK, &sf->bbuf_dmap); 606 if (error) 607 goto fail1; 608 error = bus_dmamem_alloc(sc->sc_dmat, SDMMC_SECTOR_SIZE, 609 PAGE_SIZE, 0, &ds, 1, &rseg, BUS_DMA_WAITOK); 610 if (error) 611 goto fail2; 612 error = bus_dmamem_map(sc->sc_dmat, &ds, 1, SDMMC_SECTOR_SIZE, 613 &sf->bbuf, BUS_DMA_WAITOK); 614 if (error) 615 goto fail3; 616 error = bus_dmamap_load(sc->sc_dmat, sf->bbuf_dmap, 617 sf->bbuf, SDMMC_SECTOR_SIZE, NULL, 618 BUS_DMA_WAITOK|BUS_DMA_READ|BUS_DMA_WRITE); 619 if (!error) 620 goto out; 621 622 bus_dmamem_unmap(sc->sc_dmat, sf->bbuf, SDMMC_SECTOR_SIZE); 623 fail3: 624 bus_dmamem_free(sc->sc_dmat, &ds, 1); 625 fail2: 626 bus_dmamap_destroy(sc->sc_dmat, sf->bbuf_dmap); 627 fail1: 628 free(sf, M_DEVBUF); 629 sf = NULL; 630 } 631 out: 632 633 return sf; 634 } 635 636 void 637 sdmmc_function_free(struct sdmmc_function *sf) 638 { 639 struct sdmmc_softc *sc = sf->sc; 640 641 if (ISSET(sc->sc_flags, SMF_MEM_MODE) && 642 ISSET(sc->sc_caps, SMC_CAPS_DMA) && 643 !ISSET(sc->sc_caps, SMC_CAPS_MULTI_SEG_DMA)) { 644 bus_dmamap_unload(sc->sc_dmat, sf->bbuf_dmap); 645 bus_dmamem_unmap(sc->sc_dmat, sf->bbuf, SDMMC_SECTOR_SIZE); 646 bus_dmamem_free(sc->sc_dmat, 647 sf->bbuf_dmap->dm_segs, sf->bbuf_dmap->dm_nsegs); 648 bus_dmamap_destroy(sc->sc_dmat, sf->bbuf_dmap); 649 } 650 651 free(sf, M_DEVBUF); 652 } 653 654 /* 655 * Scan for I/O functions and memory cards on the bus, allocating a 656 * sdmmc_function structure for each. 657 */ 658 static int 659 sdmmc_scan(struct sdmmc_softc *sc) 660 { 661 662 if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 663 /* Scan for I/O functions. */ 664 if (ISSET(sc->sc_flags, SMF_IO_MODE)) 665 sdmmc_io_scan(sc); 666 } 667 668 /* Scan for memory cards on the bus. */ 669 if (ISSET(sc->sc_flags, SMF_MEM_MODE)) 670 sdmmc_mem_scan(sc); 671 672 /* There should be at least one function now. */ 673 if (SIMPLEQ_EMPTY(&sc->sf_head)) { 674 aprint_error_dev(sc->sc_dev, "couldn't identify card\n"); 675 return 1; 676 } 677 return 0; 678 } 679 680 /* 681 * Initialize all the distinguished functions of the card, be it I/O 682 * or memory functions. 683 */ 684 static int 685 sdmmc_init(struct sdmmc_softc *sc) 686 { 687 struct sdmmc_function *sf; 688 689 /* Initialize all identified card functions. */ 690 SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list) { 691 if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 692 if (ISSET(sc->sc_flags, SMF_IO_MODE) && 693 sdmmc_io_init(sc, sf) != 0) { 694 aprint_error_dev(sc->sc_dev, 695 "i/o init failed\n"); 696 } 697 } 698 699 if (ISSET(sc->sc_flags, SMF_MEM_MODE) && 700 sdmmc_mem_init(sc, sf) != 0) { 701 aprint_error_dev(sc->sc_dev, "mem init failed\n"); 702 } 703 } 704 705 /* Any good functions left after initialization? */ 706 SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list) { 707 if (!ISSET(sf->flags, SFF_ERROR)) 708 return 0; 709 } 710 711 /* No, we should probably power down the card. */ 712 return 1; 713 } 714 715 void 716 sdmmc_delay(u_int usecs) 717 { 718 719 delay(usecs); 720 } 721 722 int 723 sdmmc_app_command(struct sdmmc_softc *sc, struct sdmmc_function *sf, struct sdmmc_command *cmd) 724 { 725 struct sdmmc_command acmd; 726 int error; 727 728 DPRINTF(1,("sdmmc_app_command: start\n")); 729 730 /* Don't lock */ 731 732 memset(&acmd, 0, sizeof(acmd)); 733 acmd.c_opcode = MMC_APP_CMD; 734 if (sf != NULL) { 735 acmd.c_arg = sf->rca << 16; 736 acmd.c_flags = SCF_CMD_AC | SCF_RSP_R1 | SCF_RSP_SPI_R1; 737 } else { 738 acmd.c_arg = 0; 739 acmd.c_flags = SCF_CMD_BCR | SCF_RSP_R1 | SCF_RSP_SPI_R1; 740 } 741 742 error = sdmmc_mmc_command(sc, &acmd); 743 if (error == 0) { 744 if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE) && 745 !ISSET(MMC_R1(acmd.c_resp), MMC_R1_APP_CMD)) { 746 /* Card does not support application commands. */ 747 error = ENODEV; 748 } else { 749 error = sdmmc_mmc_command(sc, cmd); 750 } 751 } 752 DPRINTF(1,("sdmmc_app_command: done (error=%d)\n", error)); 753 return error; 754 } 755 756 /* 757 * Execute MMC command and data transfers. All interactions with the 758 * host controller to complete the command happen in the context of 759 * the current process. 760 */ 761 int 762 sdmmc_mmc_command(struct sdmmc_softc *sc, struct sdmmc_command *cmd) 763 { 764 int error; 765 766 DPRINTF(1,("sdmmc_mmc_command: cmd=%d, arg=%#x, flags=%#x\n", 767 cmd->c_opcode, cmd->c_arg, cmd->c_flags)); 768 769 /* Don't lock */ 770 771 #if defined(DIAGNOSTIC) || defined(SDMMC_DEBUG) 772 if (cmd->c_data && !ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 773 if (sc->sc_card == NULL) 774 panic("%s: deselected card\n", DEVNAME(sc)); 775 } 776 #endif 777 778 sdmmc_chip_exec_command(sc->sc_sct, sc->sc_sch, cmd); 779 780 #ifdef SDMMC_DEBUG 781 sdmmc_dump_command(sc, cmd); 782 #endif 783 784 error = cmd->c_error; 785 786 DPRINTF(1,("sdmmc_mmc_command: error=%d\n", error)); 787 788 return error; 789 } 790 791 /* 792 * Send the "GO IDLE STATE" command. 793 */ 794 void 795 sdmmc_go_idle_state(struct sdmmc_softc *sc) 796 { 797 struct sdmmc_command cmd; 798 799 DPRINTF(1,("sdmmc_go_idle_state\n")); 800 801 /* Don't lock */ 802 803 memset(&cmd, 0, sizeof(cmd)); 804 cmd.c_opcode = MMC_GO_IDLE_STATE; 805 cmd.c_flags = SCF_CMD_BC | SCF_RSP_R0 | SCF_RSP_SPI_R1; 806 807 (void)sdmmc_mmc_command(sc, &cmd); 808 } 809 810 /* 811 * Retrieve (SD) or set (MMC) the relative card address (RCA). 812 */ 813 int 814 sdmmc_set_relative_addr(struct sdmmc_softc *sc, struct sdmmc_function *sf) 815 { 816 struct sdmmc_command cmd; 817 int error; 818 819 /* Don't lock */ 820 821 if (ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) 822 return EIO; 823 824 memset(&cmd, 0, sizeof(cmd)); 825 if (ISSET(sc->sc_flags, SMF_SD_MODE)) { 826 cmd.c_opcode = SD_SEND_RELATIVE_ADDR; 827 cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R6; 828 } else { 829 cmd.c_opcode = MMC_SET_RELATIVE_ADDR; 830 cmd.c_arg = MMC_ARG_RCA(sf->rca); 831 cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1; 832 } 833 error = sdmmc_mmc_command(sc, &cmd); 834 if (error) 835 return error; 836 837 if (ISSET(sc->sc_flags, SMF_SD_MODE)) 838 sf->rca = SD_R6_RCA(cmd.c_resp); 839 840 return 0; 841 } 842 843 int 844 sdmmc_select_card(struct sdmmc_softc *sc, struct sdmmc_function *sf) 845 { 846 struct sdmmc_command cmd; 847 int error; 848 849 /* Don't lock */ 850 851 if (ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) 852 return EIO; 853 854 if (sc->sc_card == sf 855 || (sf && sc->sc_card && sc->sc_card->rca == sf->rca)) { 856 sc->sc_card = sf; 857 return 0; 858 } 859 860 memset(&cmd, 0, sizeof(cmd)); 861 cmd.c_opcode = MMC_SELECT_CARD; 862 cmd.c_arg = (sf == NULL) ? 0 : MMC_ARG_RCA(sf->rca); 863 cmd.c_flags = SCF_CMD_AC | ((sf == NULL) ? SCF_RSP_R0 : SCF_RSP_R1); 864 error = sdmmc_mmc_command(sc, &cmd); 865 if (error == 0 || sf == NULL) 866 sc->sc_card = sf; 867 868 return error; 869 } 870 871 #ifdef SDMMC_DEBUG 872 static void 873 sdmmc_dump_command(struct sdmmc_softc *sc, struct sdmmc_command *cmd) 874 { 875 int i; 876 877 DPRINTF(1,("%s: cmd %u arg=%#x data=%p dlen=%d flags=%#x (error %d)\n", 878 DEVNAME(sc), cmd->c_opcode, cmd->c_arg, cmd->c_data, 879 cmd->c_datalen, cmd->c_flags, cmd->c_error)); 880 881 if (cmd->c_error || sdmmcdebug < 1) 882 return; 883 884 aprint_normal_dev(sc->sc_dev, "resp="); 885 if (ISSET(cmd->c_flags, SCF_RSP_136)) 886 for (i = 0; i < sizeof cmd->c_resp; i++) 887 aprint_normal("%02x ", ((uint8_t *)cmd->c_resp)[i]); 888 else if (ISSET(cmd->c_flags, SCF_RSP_PRESENT)) 889 for (i = 0; i < 4; i++) 890 aprint_normal("%02x ", ((uint8_t *)cmd->c_resp)[i]); 891 else 892 aprint_normal("none"); 893 aprint_normal("\n"); 894 } 895 896 void 897 sdmmc_dump_data(const char *title, void *ptr, size_t size) 898 { 899 char buf[16]; 900 uint8_t *p = ptr; 901 int i, j; 902 903 printf("sdmmc_dump_data: %s\n", title ? title : ""); 904 printf("--------+--------------------------------------------------+------------------+\n"); 905 printf("offset | +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +a +b +c +d +e +f | data |\n"); 906 printf("--------+--------------------------------------------------+------------------+\n"); 907 for (i = 0; i < (int)size; i++) { 908 if ((i % 16) == 0) { 909 printf("%08x| ", i); 910 } else if ((i % 16) == 8) { 911 printf(" "); 912 } 913 914 printf("%02x ", p[i]); 915 buf[i % 16] = p[i]; 916 917 if ((i % 16) == 15) { 918 printf("| "); 919 for (j = 0; j < 16; j++) { 920 if (buf[j] >= 0x20 && buf[j] <= 0x7e) { 921 printf("%c", buf[j]); 922 } else { 923 printf("."); 924 } 925 } 926 printf(" |\n"); 927 } 928 } 929 if ((i % 16) != 0) { 930 j = (i % 16); 931 for (; j < 16; j++) { 932 printf(" "); 933 if ((j % 16) == 8) { 934 printf(" "); 935 } 936 } 937 938 printf("| "); 939 for (j = 0; j < (i % 16); j++) { 940 if (buf[j] >= 0x20 && buf[j] <= 0x7e) { 941 printf("%c", buf[j]); 942 } else { 943 printf("."); 944 } 945 } 946 for (; j < 16; j++) { 947 printf(" "); 948 } 949 printf(" |\n"); 950 } 951 printf("--------+--------------------------------------------------+------------------+\n"); 952 } 953 #endif 954