sdmmc.c revision 1.23.2.4
1 /* $NetBSD: sdmmc.c,v 1.23.2.4 2015/12/27 12:09:58 skrll 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 (at) 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 (at) 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 1.23.2.4 2015/12/27 12:09:58 skrll 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 = 0; 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 SIMPLEQ_INIT(&sc->sf_head); 145 TAILQ_INIT(&sc->sc_tskq); 146 TAILQ_INIT(&sc->sc_intrq); 147 148 sdmmc_init_task(&sc->sc_discover_task, sdmmc_discover_task, sc); 149 sdmmc_init_task(&sc->sc_intr_task, sdmmc_intr_task, sc); 150 151 mutex_init(&sc->sc_mtx, MUTEX_DEFAULT, IPL_NONE); 152 mutex_init(&sc->sc_tskq_mtx, MUTEX_DEFAULT, IPL_SDMMC); 153 mutex_init(&sc->sc_discover_task_mtx, MUTEX_DEFAULT, IPL_SDMMC); 154 mutex_init(&sc->sc_intr_task_mtx, MUTEX_DEFAULT, IPL_SDMMC); 155 cv_init(&sc->sc_tskq_cv, "mmctaskq"); 156 157 evcnt_attach_dynamic(&sc->sc_ev_xfer, EVCNT_TYPE_MISC, NULL, 158 device_xname(self), "xfer"); 159 evcnt_attach_dynamic(&sc->sc_ev_xfer_aligned[0], EVCNT_TYPE_MISC, 160 &sc->sc_ev_xfer, device_xname(self), "xfer 512"); 161 evcnt_attach_dynamic(&sc->sc_ev_xfer_aligned[1], EVCNT_TYPE_MISC, 162 &sc->sc_ev_xfer, device_xname(self), "xfer 1024"); 163 evcnt_attach_dynamic(&sc->sc_ev_xfer_aligned[2], EVCNT_TYPE_MISC, 164 &sc->sc_ev_xfer, device_xname(self), "xfer 2048"); 165 evcnt_attach_dynamic(&sc->sc_ev_xfer_aligned[3], EVCNT_TYPE_MISC, 166 &sc->sc_ev_xfer, device_xname(self), "xfer 4096"); 167 evcnt_attach_dynamic(&sc->sc_ev_xfer_aligned[4], EVCNT_TYPE_MISC, 168 &sc->sc_ev_xfer, device_xname(self), "xfer 8192"); 169 evcnt_attach_dynamic(&sc->sc_ev_xfer_aligned[5], EVCNT_TYPE_MISC, 170 &sc->sc_ev_xfer, device_xname(self), "xfer 16384"); 171 evcnt_attach_dynamic(&sc->sc_ev_xfer_aligned[6], EVCNT_TYPE_MISC, 172 &sc->sc_ev_xfer, device_xname(self), "xfer 32768"); 173 evcnt_attach_dynamic(&sc->sc_ev_xfer_aligned[7], EVCNT_TYPE_MISC, 174 &sc->sc_ev_xfer, device_xname(self), "xfer 65536"); 175 evcnt_attach_dynamic(&sc->sc_ev_xfer_unaligned, EVCNT_TYPE_MISC, 176 &sc->sc_ev_xfer, device_xname(self), "xfer unaligned"); 177 evcnt_attach_dynamic(&sc->sc_ev_xfer_error, EVCNT_TYPE_MISC, 178 &sc->sc_ev_xfer, device_xname(self), "xfer error"); 179 180 if (ISSET(sc->sc_caps, SMC_CAPS_POLL_CARD_DET)) { 181 callout_init(&sc->sc_card_detect_ch, 0); 182 callout_reset(&sc->sc_card_detect_ch, hz, 183 sdmmc_polling_card, sc); 184 } 185 186 if (!pmf_device_register(self, NULL, NULL)) { 187 aprint_error_dev(self, "couldn't establish power handler\n"); 188 } 189 190 SET(sc->sc_flags, SMF_INITED); 191 192 /* 193 * Create the event thread that will attach and detach cards 194 * and perform other lengthy operations. 195 */ 196 config_pending_incr(self); 197 config_interrupts(self, sdmmc_doattach); 198 } 199 200 static int 201 sdmmc_detach(device_t self, int flags) 202 { 203 struct sdmmc_softc *sc = device_private(self); 204 int error, i; 205 206 mutex_enter(&sc->sc_tskq_mtx); 207 sc->sc_dying = 1; 208 cv_signal(&sc->sc_tskq_cv); 209 while (sc->sc_tskq_lwp != NULL) 210 cv_wait(&sc->sc_tskq_cv, &sc->sc_tskq_mtx); 211 mutex_exit(&sc->sc_tskq_mtx); 212 213 pmf_device_deregister(self); 214 215 error = config_detach_children(self, flags); 216 if (error) 217 return error; 218 219 if (ISSET(sc->sc_caps, SMC_CAPS_DMA)) { 220 bus_dmamap_unload(sc->sc_dmat, sc->sc_dmap); 221 bus_dmamap_destroy(sc->sc_dmat, sc->sc_dmap); 222 } 223 224 if (ISSET(sc->sc_caps, SMC_CAPS_POLL_CARD_DET)) { 225 callout_halt(&sc->sc_card_detect_ch, NULL); 226 callout_destroy(&sc->sc_card_detect_ch); 227 } 228 229 cv_destroy(&sc->sc_tskq_cv); 230 mutex_destroy(&sc->sc_intr_task_mtx); 231 mutex_destroy(&sc->sc_discover_task_mtx); 232 mutex_destroy(&sc->sc_tskq_mtx); 233 mutex_destroy(&sc->sc_mtx); 234 235 evcnt_detach(&sc->sc_ev_xfer_error); 236 evcnt_detach(&sc->sc_ev_xfer_unaligned); 237 for (i = 0; i < __arraycount(sc->sc_ev_xfer_aligned); i++) 238 evcnt_detach(&sc->sc_ev_xfer_aligned[i]); 239 evcnt_detach(&sc->sc_ev_xfer); 240 241 return 0; 242 } 243 244 static void 245 sdmmc_doattach(device_t dev) 246 { 247 struct sdmmc_softc *sc = device_private(dev); 248 249 if (kthread_create(PRI_BIO, 0, NULL, 250 sdmmc_task_thread, sc, &sc->sc_tskq_lwp, "%s", device_xname(dev))) { 251 aprint_error_dev(dev, "couldn't create task thread\n"); 252 } 253 } 254 255 void 256 sdmmc_add_task(struct sdmmc_softc *sc, struct sdmmc_task *task) 257 { 258 259 mutex_enter(&sc->sc_tskq_mtx); 260 task->onqueue = 1; 261 task->sc = sc; 262 TAILQ_INSERT_TAIL(&sc->sc_tskq, task, next); 263 cv_broadcast(&sc->sc_tskq_cv); 264 mutex_exit(&sc->sc_tskq_mtx); 265 } 266 267 static inline void 268 sdmmc_del_task1(struct sdmmc_softc *sc, struct sdmmc_task *task) 269 { 270 271 TAILQ_REMOVE(&sc->sc_tskq, task, next); 272 task->sc = NULL; 273 task->onqueue = 0; 274 } 275 276 void 277 sdmmc_del_task(struct sdmmc_task *task) 278 { 279 struct sdmmc_softc *sc = (struct sdmmc_softc *)task->sc; 280 281 if (sc != NULL) { 282 mutex_enter(&sc->sc_tskq_mtx); 283 sdmmc_del_task1(sc, task); 284 mutex_exit(&sc->sc_tskq_mtx); 285 } 286 } 287 288 static void 289 sdmmc_task_thread(void *arg) 290 { 291 struct sdmmc_softc *sc = (struct sdmmc_softc *)arg; 292 struct sdmmc_task *task; 293 294 sdmmc_discover_task(sc); 295 config_pending_decr(sc->sc_dev); 296 297 mutex_enter(&sc->sc_tskq_mtx); 298 for (;;) { 299 task = TAILQ_FIRST(&sc->sc_tskq); 300 if (task != NULL) { 301 sdmmc_del_task1(sc, task); 302 mutex_exit(&sc->sc_tskq_mtx); 303 (*task->func)(task->arg); 304 mutex_enter(&sc->sc_tskq_mtx); 305 } else { 306 /* Check for the exit condition. */ 307 if (sc->sc_dying) 308 break; 309 cv_wait(&sc->sc_tskq_cv, &sc->sc_tskq_mtx); 310 } 311 } 312 /* time to die. */ 313 sc->sc_dying = 0; 314 if (ISSET(sc->sc_flags, SMF_CARD_PRESENT)) { 315 /* 316 * sdmmc_card_detach() may issue commands, 317 * so temporarily drop the interrupt-blocking lock. 318 */ 319 mutex_exit(&sc->sc_tskq_mtx); 320 sdmmc_card_detach(sc, DETACH_FORCE); 321 mutex_enter(&sc->sc_tskq_mtx); 322 } 323 sc->sc_tskq_lwp = NULL; 324 cv_broadcast(&sc->sc_tskq_cv); 325 mutex_exit(&sc->sc_tskq_mtx); 326 kthread_exit(0); 327 } 328 329 void 330 sdmmc_needs_discover(device_t dev) 331 { 332 struct sdmmc_softc *sc = device_private(dev); 333 334 if (!ISSET(sc->sc_flags, SMF_INITED)) 335 return; 336 337 mutex_enter(&sc->sc_discover_task_mtx); 338 if (!sdmmc_task_pending(&sc->sc_discover_task)) 339 sdmmc_add_task(sc, &sc->sc_discover_task); 340 mutex_exit(&sc->sc_discover_task_mtx); 341 } 342 343 static void 344 sdmmc_discover_task(void *arg) 345 { 346 struct sdmmc_softc *sc = (struct sdmmc_softc *)arg; 347 int card_detect, card_present; 348 349 mutex_enter(&sc->sc_discover_task_mtx); 350 card_detect = sdmmc_chip_card_detect(sc->sc_sct, sc->sc_sch); 351 card_present = ISSET(sc->sc_flags, SMF_CARD_PRESENT); 352 if (card_detect) 353 SET(sc->sc_flags, SMF_CARD_PRESENT); 354 else 355 CLR(sc->sc_flags, SMF_CARD_PRESENT); 356 mutex_exit(&sc->sc_discover_task_mtx); 357 358 if (card_detect) { 359 if (!card_present) { 360 sdmmc_card_attach(sc); 361 mutex_enter(&sc->sc_discover_task_mtx); 362 if (!ISSET(sc->sc_flags, SMF_CARD_ATTACHED)) 363 CLR(sc->sc_flags, SMF_CARD_PRESENT); 364 mutex_exit(&sc->sc_discover_task_mtx); 365 } 366 } else { 367 if (card_present) 368 sdmmc_card_detach(sc, DETACH_FORCE); 369 } 370 } 371 372 static void 373 sdmmc_polling_card(void *arg) 374 { 375 struct sdmmc_softc *sc = (struct sdmmc_softc *)arg; 376 int card_detect, card_present; 377 378 mutex_enter(&sc->sc_discover_task_mtx); 379 card_detect = sdmmc_chip_card_detect(sc->sc_sct, sc->sc_sch); 380 card_present = ISSET(sc->sc_flags, SMF_CARD_PRESENT); 381 mutex_exit(&sc->sc_discover_task_mtx); 382 383 if (card_detect != card_present) 384 sdmmc_needs_discover(sc->sc_dev); 385 386 callout_schedule(&sc->sc_card_detect_ch, hz); 387 } 388 389 /* 390 * Called from process context when a card is present. 391 */ 392 static void 393 sdmmc_card_attach(struct sdmmc_softc *sc) 394 { 395 struct sdmmc_function *sf; 396 struct sdmmc_attach_args saa; 397 int error; 398 399 DPRINTF(1,("%s: attach card\n", DEVNAME(sc))); 400 401 CLR(sc->sc_flags, SMF_CARD_ATTACHED); 402 403 /* 404 * Power up the card (or card stack). 405 */ 406 error = sdmmc_enable(sc); 407 if (error) { 408 if (!ISSET(sc->sc_caps, SMC_CAPS_POLL_CARD_DET)) { 409 aprint_error_dev(sc->sc_dev, "couldn't enable card: %d\n", error); 410 } 411 goto err; 412 } 413 414 /* 415 * Scan for I/O functions and memory cards on the bus, 416 * allocating a sdmmc_function structure for each. 417 */ 418 error = sdmmc_scan(sc); 419 if (error) { 420 aprint_error_dev(sc->sc_dev, "no functions\n"); 421 goto err; 422 } 423 424 /* 425 * Initialize the I/O functions and memory cards. 426 */ 427 error = sdmmc_init(sc); 428 if (error) { 429 aprint_error_dev(sc->sc_dev, "init failed\n"); 430 goto err; 431 } 432 433 SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list) { 434 if (ISSET(sc->sc_flags, SMF_IO_MODE) && sf->number < 1) 435 continue; 436 437 memset(&saa, 0, sizeof saa); 438 saa.manufacturer = sf->cis.manufacturer; 439 saa.product = sf->cis.product; 440 saa.interface = sf->interface; 441 saa.sf = sf; 442 443 sf->child = 444 config_found_ia(sc->sc_dev, "sdmmc", &saa, sdmmc_print); 445 } 446 447 SET(sc->sc_flags, SMF_CARD_ATTACHED); 448 return; 449 450 err: 451 sdmmc_card_detach(sc, DETACH_FORCE); 452 } 453 454 /* 455 * Called from process context with DETACH_* flags from <sys/device.h> 456 * when cards are gone. 457 */ 458 static void 459 sdmmc_card_detach(struct sdmmc_softc *sc, int flags) 460 { 461 struct sdmmc_function *sf, *sfnext; 462 463 DPRINTF(1,("%s: detach card\n", DEVNAME(sc))); 464 465 if (ISSET(sc->sc_flags, SMF_CARD_ATTACHED)) { 466 SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list) { 467 if (sf->child != NULL) { 468 config_detach(sf->child, DETACH_FORCE); 469 sf->child = NULL; 470 } 471 } 472 473 KASSERT(TAILQ_EMPTY(&sc->sc_intrq)); 474 475 CLR(sc->sc_flags, SMF_CARD_ATTACHED); 476 } 477 478 /* Power down. */ 479 sdmmc_disable(sc); 480 481 /* Free all sdmmc_function structures. */ 482 for (sf = SIMPLEQ_FIRST(&sc->sf_head); sf != NULL; sf = sfnext) { 483 sfnext = SIMPLEQ_NEXT(sf, sf_list); 484 sdmmc_function_free(sf); 485 } 486 SIMPLEQ_INIT(&sc->sf_head); 487 sc->sc_function_count = 0; 488 sc->sc_fn0 = NULL; 489 } 490 491 static int 492 sdmmc_print(void *aux, const char *pnp) 493 { 494 struct sdmmc_attach_args *sa = aux; 495 struct sdmmc_function *sf = sa->sf; 496 struct sdmmc_cis *cis = &sf->sc->sc_fn0->cis; 497 int i, x; 498 499 if (pnp) { 500 if (sf->number == 0) 501 return QUIET; 502 503 for (i = 0; i < 4 && cis->cis1_info[i]; i++) 504 printf("%s%s", i ? ", " : "\"", cis->cis1_info[i]); 505 if (i != 0) 506 printf("\""); 507 508 if ((cis->manufacturer != SDMMC_VENDOR_INVALID && 509 cis->product != SDMMC_PRODUCT_INVALID) || 510 sa->interface != SD_IO_SFIC_NO_STANDARD) { 511 x = !!(cis->manufacturer != SDMMC_VENDOR_INVALID); 512 x += !!(cis->product != SDMMC_PRODUCT_INVALID); 513 x += !!(sa->interface != SD_IO_SFIC_NO_STANDARD); 514 printf("%s(", i ? " " : ""); 515 if (cis->manufacturer != SDMMC_VENDOR_INVALID) 516 printf("manufacturer 0x%x%s", 517 cis->manufacturer, (--x == 0) ? "" : ", "); 518 if (cis->product != SDMMC_PRODUCT_INVALID) 519 printf("product 0x%x%s", 520 cis->product, (--x == 0) ? "" : ", "); 521 if (sa->interface != SD_IO_SFIC_NO_STANDARD) 522 printf("standard function interface code 0x%x", 523 sf->interface); 524 printf(")"); 525 } 526 printf("%sat %s", i ? " " : "", pnp); 527 } 528 if (sf->number > 0) 529 printf(" function %d", sf->number); 530 531 if (!pnp) { 532 for (i = 0; i < 3 && cis->cis1_info[i]; i++) 533 printf("%s%s", i ? ", " : " \"", cis->cis1_info[i]); 534 if (i != 0) 535 printf("\""); 536 } 537 return UNCONF; 538 } 539 540 static int 541 sdmmc_enable(struct sdmmc_softc *sc) 542 { 543 int error; 544 545 /* 546 * Calculate the equivalent of the card OCR from the host 547 * capabilities and select the maximum supported bus voltage. 548 */ 549 error = sdmmc_chip_bus_power(sc->sc_sct, sc->sc_sch, 550 sdmmc_chip_host_ocr(sc->sc_sct, sc->sc_sch)); 551 if (error) { 552 aprint_error_dev(sc->sc_dev, "couldn't supply bus power\n"); 553 goto out; 554 } 555 556 /* 557 * Select the minimum clock frequency. 558 */ 559 error = sdmmc_chip_bus_clock(sc->sc_sct, sc->sc_sch, SDMMC_SDCLK_400K, 560 false); 561 if (error) { 562 aprint_error_dev(sc->sc_dev, "couldn't supply clock\n"); 563 goto out; 564 } 565 566 /* XXX wait for card to power up */ 567 sdmmc_delay(100000); 568 569 if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 570 /* Initialize SD I/O card function(s). */ 571 error = sdmmc_io_enable(sc); 572 if (error) { 573 DPRINTF(1, ("%s: sdmmc_io_enable failed %d\n", DEVNAME(sc), error)); 574 goto out; 575 } 576 } 577 578 /* Initialize SD/MMC memory card(s). */ 579 if (ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE) || 580 ISSET(sc->sc_flags, SMF_MEM_MODE)) { 581 error = sdmmc_mem_enable(sc); 582 if (error) { 583 DPRINTF(1, ("%s: sdmmc_mem_enable failed %d\n", DEVNAME(sc), error)); 584 goto out; 585 } 586 } 587 588 out: 589 if (error) 590 sdmmc_disable(sc); 591 return error; 592 } 593 594 static void 595 sdmmc_disable(struct sdmmc_softc *sc) 596 { 597 /* XXX complete commands if card is still present. */ 598 599 if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 600 /* Make sure no card is still selected. */ 601 (void)sdmmc_select_card(sc, NULL); 602 } 603 604 /* Turn off bus power and clock. */ 605 (void)sdmmc_chip_bus_width(sc->sc_sct, sc->sc_sch, 1); 606 (void)sdmmc_chip_bus_clock(sc->sc_sct, sc->sc_sch, SDMMC_SDCLK_OFF, 607 false); 608 (void)sdmmc_chip_bus_power(sc->sc_sct, sc->sc_sch, 0); 609 sc->sc_busclk = sc->sc_clkmax; 610 } 611 612 /* 613 * Set the lowest bus voltage supported by the card and the host. 614 */ 615 int 616 sdmmc_set_bus_power(struct sdmmc_softc *sc, uint32_t host_ocr, 617 uint32_t card_ocr) 618 { 619 uint32_t bit; 620 621 /* Mask off unsupported voltage levels and select the lowest. */ 622 DPRINTF(1,("%s: host_ocr=%x ", DEVNAME(sc), host_ocr)); 623 host_ocr &= card_ocr; 624 for (bit = 4; bit < 23; bit++) { 625 if (ISSET(host_ocr, (1 << bit))) { 626 host_ocr &= (3 << bit); 627 break; 628 } 629 } 630 DPRINTF(1,("card_ocr=%x new_ocr=%x\n", card_ocr, host_ocr)); 631 632 if (host_ocr == 0 || 633 sdmmc_chip_bus_power(sc->sc_sct, sc->sc_sch, host_ocr) != 0) 634 return 1; 635 return 0; 636 } 637 638 struct sdmmc_function * 639 sdmmc_function_alloc(struct sdmmc_softc *sc) 640 { 641 struct sdmmc_function *sf; 642 643 sf = malloc(sizeof *sf, M_DEVBUF, M_WAITOK|M_ZERO); 644 if (sf == NULL) { 645 aprint_error_dev(sc->sc_dev, 646 "couldn't alloc memory (sdmmc function)\n"); 647 return NULL; 648 } 649 650 sf->sc = sc; 651 sf->number = -1; 652 sf->cis.manufacturer = SDMMC_VENDOR_INVALID; 653 sf->cis.product = SDMMC_PRODUCT_INVALID; 654 sf->cis.function = SDMMC_FUNCTION_INVALID; 655 sf->width = 1; 656 657 if (ISSET(sc->sc_flags, SMF_MEM_MODE) && 658 ISSET(sc->sc_caps, SMC_CAPS_DMA) && 659 !ISSET(sc->sc_caps, SMC_CAPS_MULTI_SEG_DMA)) { 660 bus_dma_segment_t ds; 661 int rseg, error; 662 663 error = bus_dmamap_create(sc->sc_dmat, MAXPHYS, 1, 664 MAXPHYS, 0, BUS_DMA_WAITOK, &sf->bbuf_dmap); 665 if (error) 666 goto fail1; 667 error = bus_dmamem_alloc(sc->sc_dmat, MAXPHYS, 668 PAGE_SIZE, 0, &ds, 1, &rseg, BUS_DMA_WAITOK); 669 if (error) 670 goto fail2; 671 error = bus_dmamem_map(sc->sc_dmat, &ds, 1, MAXPHYS, 672 &sf->bbuf, BUS_DMA_WAITOK); 673 if (error) 674 goto fail3; 675 error = bus_dmamap_load(sc->sc_dmat, sf->bbuf_dmap, 676 sf->bbuf, MAXPHYS, NULL, 677 BUS_DMA_WAITOK|BUS_DMA_READ|BUS_DMA_WRITE); 678 if (error) 679 goto fail4; 680 error = bus_dmamap_create(sc->sc_dmat, MAXPHYS, 1, 681 MAXPHYS, 0, BUS_DMA_WAITOK, &sf->sseg_dmap); 682 if (!error) 683 goto out; 684 685 bus_dmamap_unload(sc->sc_dmat, sf->bbuf_dmap); 686 fail4: 687 bus_dmamem_unmap(sc->sc_dmat, sf->bbuf, MAXPHYS); 688 fail3: 689 bus_dmamem_free(sc->sc_dmat, &ds, 1); 690 fail2: 691 bus_dmamap_destroy(sc->sc_dmat, sf->bbuf_dmap); 692 fail1: 693 free(sf, M_DEVBUF); 694 sf = NULL; 695 } 696 out: 697 698 return sf; 699 } 700 701 void 702 sdmmc_function_free(struct sdmmc_function *sf) 703 { 704 struct sdmmc_softc *sc = sf->sc; 705 706 if (ISSET(sc->sc_flags, SMF_MEM_MODE) && 707 ISSET(sc->sc_caps, SMC_CAPS_DMA) && 708 !ISSET(sc->sc_caps, SMC_CAPS_MULTI_SEG_DMA)) { 709 bus_dmamap_destroy(sc->sc_dmat, sf->sseg_dmap); 710 bus_dmamap_unload(sc->sc_dmat, sf->bbuf_dmap); 711 bus_dmamem_unmap(sc->sc_dmat, sf->bbuf, MAXPHYS); 712 bus_dmamem_free(sc->sc_dmat, 713 sf->bbuf_dmap->dm_segs, sf->bbuf_dmap->dm_nsegs); 714 bus_dmamap_destroy(sc->sc_dmat, sf->bbuf_dmap); 715 } 716 717 free(sf, M_DEVBUF); 718 } 719 720 /* 721 * Scan for I/O functions and memory cards on the bus, allocating a 722 * sdmmc_function structure for each. 723 */ 724 static int 725 sdmmc_scan(struct sdmmc_softc *sc) 726 { 727 728 if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 729 /* Scan for I/O functions. */ 730 if (ISSET(sc->sc_flags, SMF_IO_MODE)) 731 sdmmc_io_scan(sc); 732 } 733 734 /* Scan for memory cards on the bus. */ 735 if (ISSET(sc->sc_flags, SMF_MEM_MODE)) 736 sdmmc_mem_scan(sc); 737 738 /* There should be at least one function now. */ 739 if (SIMPLEQ_EMPTY(&sc->sf_head)) { 740 aprint_error_dev(sc->sc_dev, "couldn't identify card\n"); 741 return 1; 742 } 743 return 0; 744 } 745 746 /* 747 * Initialize all the distinguished functions of the card, be it I/O 748 * or memory functions. 749 */ 750 static int 751 sdmmc_init(struct sdmmc_softc *sc) 752 { 753 struct sdmmc_function *sf; 754 755 /* Initialize all identified card functions. */ 756 SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list) { 757 if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 758 if (ISSET(sc->sc_flags, SMF_IO_MODE) && 759 sdmmc_io_init(sc, sf) != 0) { 760 aprint_error_dev(sc->sc_dev, 761 "i/o init failed\n"); 762 } 763 } 764 765 if (ISSET(sc->sc_flags, SMF_MEM_MODE) && 766 sdmmc_mem_init(sc, sf) != 0) { 767 aprint_error_dev(sc->sc_dev, "mem init failed\n"); 768 } 769 } 770 771 /* Any good functions left after initialization? */ 772 SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list) { 773 if (!ISSET(sf->flags, SFF_ERROR)) 774 return 0; 775 } 776 777 /* No, we should probably power down the card. */ 778 return 1; 779 } 780 781 void 782 sdmmc_delay(u_int usecs) 783 { 784 785 delay(usecs); 786 } 787 788 int 789 sdmmc_app_command(struct sdmmc_softc *sc, struct sdmmc_function *sf, struct sdmmc_command *cmd) 790 { 791 struct sdmmc_command acmd; 792 int error; 793 794 DPRINTF(1,("sdmmc_app_command: start\n")); 795 796 /* Don't lock */ 797 798 memset(&acmd, 0, sizeof(acmd)); 799 acmd.c_opcode = MMC_APP_CMD; 800 acmd.c_arg = (sf != NULL) ? (sf->rca << 16) : 0; 801 acmd.c_flags = SCF_CMD_AC | SCF_RSP_R1 | SCF_RSP_SPI_R1 | (cmd->c_flags & SCF_TOUT_OK); 802 803 error = sdmmc_mmc_command(sc, &acmd); 804 if (error == 0) { 805 if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE) && 806 !ISSET(MMC_R1(acmd.c_resp), MMC_R1_APP_CMD)) { 807 /* Card does not support application commands. */ 808 error = ENODEV; 809 } else { 810 error = sdmmc_mmc_command(sc, cmd); 811 } 812 } 813 DPRINTF(1,("sdmmc_app_command: done (error=%d)\n", error)); 814 return error; 815 } 816 817 /* 818 * Execute MMC command and data transfers. All interactions with the 819 * host controller to complete the command happen in the context of 820 * the current process. 821 */ 822 int 823 sdmmc_mmc_command(struct sdmmc_softc *sc, struct sdmmc_command *cmd) 824 { 825 int error; 826 827 DPRINTF(1,("sdmmc_mmc_command: cmd=%d, arg=%#x, flags=%#x\n", 828 cmd->c_opcode, cmd->c_arg, cmd->c_flags)); 829 830 /* Don't lock */ 831 832 #if defined(DIAGNOSTIC) || defined(SDMMC_DEBUG) 833 if (cmd->c_data && !ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 834 if (sc->sc_card == NULL) 835 panic("%s: deselected card\n", DEVNAME(sc)); 836 } 837 #endif 838 839 sdmmc_chip_exec_command(sc->sc_sct, sc->sc_sch, cmd); 840 841 #ifdef SDMMC_DEBUG 842 sdmmc_dump_command(sc, cmd); 843 #endif 844 845 error = cmd->c_error; 846 847 DPRINTF(1,("sdmmc_mmc_command: error=%d\n", error)); 848 849 if (error && 850 (cmd->c_opcode == MMC_READ_BLOCK_MULTIPLE || 851 cmd->c_opcode == MMC_WRITE_BLOCK_MULTIPLE)) { 852 sdmmc_stop_transmission(sc); 853 } 854 855 return error; 856 } 857 858 /* 859 * Send the "STOP TRANSMISSION" command 860 */ 861 void 862 sdmmc_stop_transmission(struct sdmmc_softc *sc) 863 { 864 struct sdmmc_command cmd; 865 866 DPRINTF(1,("sdmmc_stop_transmission\n")); 867 868 /* Don't lock */ 869 870 memset(&cmd, 0, sizeof(cmd)); 871 cmd.c_opcode = MMC_STOP_TRANSMISSION; 872 cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1B | SCF_RSP_SPI_R1B; 873 874 (void)sdmmc_mmc_command(sc, &cmd); 875 } 876 877 /* 878 * Send the "GO IDLE STATE" command. 879 */ 880 void 881 sdmmc_go_idle_state(struct sdmmc_softc *sc) 882 { 883 struct sdmmc_command cmd; 884 885 DPRINTF(1,("sdmmc_go_idle_state\n")); 886 887 /* Don't lock */ 888 889 memset(&cmd, 0, sizeof(cmd)); 890 cmd.c_opcode = MMC_GO_IDLE_STATE; 891 cmd.c_flags = SCF_CMD_BC | SCF_RSP_R0 | SCF_RSP_SPI_R1; 892 893 (void)sdmmc_mmc_command(sc, &cmd); 894 } 895 896 /* 897 * Retrieve (SD) or set (MMC) the relative card address (RCA). 898 */ 899 int 900 sdmmc_set_relative_addr(struct sdmmc_softc *sc, struct sdmmc_function *sf) 901 { 902 struct sdmmc_command cmd; 903 int error; 904 905 /* Don't lock */ 906 907 if (ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 908 aprint_error_dev(sc->sc_dev, 909 "sdmmc_set_relative_addr: SMC_CAPS_SPI_MODE set"); 910 return EIO; 911 } 912 913 memset(&cmd, 0, sizeof(cmd)); 914 if (ISSET(sc->sc_flags, SMF_SD_MODE)) { 915 cmd.c_opcode = SD_SEND_RELATIVE_ADDR; 916 cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R6; 917 } else { 918 cmd.c_opcode = MMC_SET_RELATIVE_ADDR; 919 cmd.c_arg = MMC_ARG_RCA(sf->rca); 920 cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1; 921 } 922 error = sdmmc_mmc_command(sc, &cmd); 923 if (error) 924 return error; 925 926 if (ISSET(sc->sc_flags, SMF_SD_MODE)) 927 sf->rca = SD_R6_RCA(cmd.c_resp); 928 929 return 0; 930 } 931 932 int 933 sdmmc_select_card(struct sdmmc_softc *sc, struct sdmmc_function *sf) 934 { 935 struct sdmmc_command cmd; 936 int error; 937 938 /* Don't lock */ 939 940 if (ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) { 941 aprint_error_dev(sc->sc_dev, 942 "sdmmc_select_card: SMC_CAPS_SPI_MODE set"); 943 return EIO; 944 } 945 946 if (sc->sc_card == sf 947 || (sf && sc->sc_card && sc->sc_card->rca == sf->rca)) { 948 sc->sc_card = sf; 949 return 0; 950 } 951 952 memset(&cmd, 0, sizeof(cmd)); 953 cmd.c_opcode = MMC_SELECT_CARD; 954 cmd.c_arg = (sf == NULL) ? 0 : MMC_ARG_RCA(sf->rca); 955 cmd.c_flags = SCF_CMD_AC | ((sf == NULL) ? SCF_RSP_R0 : SCF_RSP_R1); 956 error = sdmmc_mmc_command(sc, &cmd); 957 if (error == 0 || sf == NULL) 958 sc->sc_card = sf; 959 960 return error; 961 } 962 963 #ifdef SDMMC_DEBUG 964 static void 965 sdmmc_dump_command(struct sdmmc_softc *sc, struct sdmmc_command *cmd) 966 { 967 int i; 968 969 DPRINTF(1,("%s: cmd %u arg=%#x data=%p dlen=%d flags=%#x (error %d)\n", 970 DEVNAME(sc), cmd->c_opcode, cmd->c_arg, cmd->c_data, 971 cmd->c_datalen, cmd->c_flags, cmd->c_error)); 972 973 if (cmd->c_error || sdmmcdebug < 1) 974 return; 975 976 aprint_normal_dev(sc->sc_dev, "resp="); 977 if (ISSET(cmd->c_flags, SCF_RSP_136)) 978 for (i = 0; i < sizeof cmd->c_resp; i++) 979 aprint_normal("%02x ", ((uint8_t *)cmd->c_resp)[i]); 980 else if (ISSET(cmd->c_flags, SCF_RSP_PRESENT)) 981 for (i = 0; i < 4; i++) 982 aprint_normal("%02x ", ((uint8_t *)cmd->c_resp)[i]); 983 else 984 aprint_normal("none"); 985 aprint_normal("\n"); 986 } 987 988 void 989 sdmmc_dump_data(const char *title, void *ptr, size_t size) 990 { 991 char buf[16]; 992 uint8_t *p = ptr; 993 int i, j; 994 995 printf("sdmmc_dump_data: %s\n", title ? title : ""); 996 printf("--------+--------------------------------------------------+------------------+\n"); 997 printf("offset | +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +a +b +c +d +e +f | data |\n"); 998 printf("--------+--------------------------------------------------+------------------+\n"); 999 for (i = 0; i < (int)size; i++) { 1000 if ((i % 16) == 0) { 1001 printf("%08x| ", i); 1002 } else if ((i % 16) == 8) { 1003 printf(" "); 1004 } 1005 1006 printf("%02x ", p[i]); 1007 buf[i % 16] = p[i]; 1008 1009 if ((i % 16) == 15) { 1010 printf("| "); 1011 for (j = 0; j < 16; j++) { 1012 if (buf[j] >= 0x20 && buf[j] <= 0x7e) { 1013 printf("%c", buf[j]); 1014 } else { 1015 printf("."); 1016 } 1017 } 1018 printf(" |\n"); 1019 } 1020 } 1021 if ((i % 16) != 0) { 1022 j = (i % 16); 1023 for (; j < 16; j++) { 1024 printf(" "); 1025 if ((j % 16) == 8) { 1026 printf(" "); 1027 } 1028 } 1029 1030 printf("| "); 1031 for (j = 0; j < (i % 16); j++) { 1032 if (buf[j] >= 0x20 && buf[j] <= 0x7e) { 1033 printf("%c", buf[j]); 1034 } else { 1035 printf("."); 1036 } 1037 } 1038 for (; j < 16; j++) { 1039 printf(" "); 1040 } 1041 printf(" |\n"); 1042 } 1043 printf("--------+--------------------------------------------------+------------------+\n"); 1044 } 1045 #endif 1046
Indexes created Thu Oct 23 22:10:10 GMT 2025