sdmmc_io.c revision 1.3
1 /* $NetBSD: sdmmc_io.c,v 1.3 2010/10/07 12:24:23 kiyohara Exp $ */ 2 /* $OpenBSD: sdmmc_io.c,v 1.10 2007/09/17 01:33:33 krw 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 /* Routines for SD I/O cards. */ 21 22 #include <sys/cdefs.h> 23 __KERNEL_RCSID(0, "$NetBSD: sdmmc_io.c,v 1.3 2010/10/07 12:24:23 kiyohara Exp $"); 24 25 #include <sys/param.h> 26 #include <sys/kernel.h> 27 #include <sys/malloc.h> 28 #include <sys/proc.h> 29 #include <sys/systm.h> 30 31 #include <dev/sdmmc/sdmmc_ioreg.h> 32 #include <dev/sdmmc/sdmmcchip.h> 33 #include <dev/sdmmc/sdmmcreg.h> 34 #include <dev/sdmmc/sdmmcvar.h> 35 36 #ifdef SDMMC_DEBUG 37 #define DPRINTF(s) do { printf s; } while (0) 38 #else 39 #define DPRINTF(s) do {} while (0) 40 #endif 41 42 struct sdmmc_intr_handler { 43 struct sdmmc_softc *ih_softc; 44 char *ih_name; 45 int (*ih_fun)(void *); 46 void *ih_arg; 47 TAILQ_ENTRY(sdmmc_intr_handler) entry; 48 }; 49 50 static int sdmmc_io_rw_direct(struct sdmmc_softc *, 51 struct sdmmc_function *, int, u_char *, int); 52 static int sdmmc_io_rw_extended(struct sdmmc_softc *, 53 struct sdmmc_function *, int, u_char *, int, int); 54 #if 0 55 static int sdmmc_io_xchg(struct sdmmc_softc *, struct sdmmc_function *, 56 int, u_char *); 57 #endif 58 static void sdmmc_io_reset(struct sdmmc_softc *); 59 static int sdmmc_io_send_op_cond(struct sdmmc_softc *, uint32_t, 60 uint32_t *); 61 62 /* 63 * Initialize SD I/O card functions (before memory cards). The host 64 * system and controller must support card interrupts in order to use 65 * I/O functions. 66 */ 67 int 68 sdmmc_io_enable(struct sdmmc_softc *sc) 69 { 70 uint32_t host_ocr; 71 uint32_t card_ocr; 72 int error; 73 74 SDMMC_LOCK(sc); 75 76 /* Set host mode to SD "combo" card. */ 77 SET(sc->sc_flags, SMF_SD_MODE|SMF_IO_MODE|SMF_MEM_MODE); 78 79 /* Reset I/O functions. */ 80 sdmmc_io_reset(sc); 81 82 /* 83 * Read the I/O OCR value, determine the number of I/O 84 * functions and whether memory is also present (a "combo 85 * card") by issuing CMD5. SD memory-only and MMC cards 86 * do not respond to CMD5. 87 */ 88 error = sdmmc_io_send_op_cond(sc, 0, &card_ocr); 89 if (error) { 90 /* No SDIO card; switch to SD memory-only mode. */ 91 CLR(sc->sc_flags, SMF_IO_MODE); 92 error = 0; 93 goto out; 94 } 95 96 /* Parse the additional bits in the I/O OCR value. */ 97 if (!ISSET(card_ocr, SD_IO_OCR_MEM_PRESENT)) { 98 /* SDIO card without memory (not a "combo card"). */ 99 DPRINTF(("%s: no memory present\n", SDMMCDEVNAME(sc))); 100 CLR(sc->sc_flags, SMF_MEM_MODE); 101 } 102 sc->sc_function_count = SD_IO_OCR_NUM_FUNCTIONS(card_ocr); 103 if (sc->sc_function_count == 0) { 104 /* Useless SDIO card without any I/O functions. */ 105 DPRINTF(("%s: no I/O functions\n", SDMMCDEVNAME(sc))); 106 CLR(sc->sc_flags, SMF_IO_MODE); 107 error = 0; 108 goto out; 109 } 110 card_ocr &= SD_IO_OCR_MASK; 111 112 /* Set the lowest voltage supported by the card and host. */ 113 host_ocr = sdmmc_chip_host_ocr(sc->sc_sct, sc->sc_sch); 114 error = sdmmc_set_bus_power(sc, host_ocr, card_ocr); 115 if (error) { 116 aprint_error_dev(sc->sc_dev, 117 "couldn't supply voltage requested by card\n"); 118 goto out; 119 } 120 121 /* Reset I/O functions (again). */ 122 sdmmc_io_reset(sc); 123 124 /* Send the new OCR value until all cards are ready. */ 125 error = sdmmc_io_send_op_cond(sc, host_ocr, NULL); 126 if (error) { 127 aprint_error_dev(sc->sc_dev, "couldn't send I/O OCR\n"); 128 goto out; 129 } 130 131 out: 132 SDMMC_UNLOCK(sc); 133 134 return error; 135 } 136 137 /* 138 * Allocate sdmmc_function structures for SD card I/O function 139 * (including function 0). 140 */ 141 void 142 sdmmc_io_scan(struct sdmmc_softc *sc) 143 { 144 struct sdmmc_function *sf0, *sf; 145 int error; 146 int i; 147 148 SDMMC_LOCK(sc); 149 150 sf0 = sdmmc_function_alloc(sc); 151 sf0->number = 0; 152 error = sdmmc_set_relative_addr(sc, sf0); 153 if (error) { 154 aprint_error_dev(sc->sc_dev, "couldn't set I/O RCA\n"); 155 SET(sf0->flags, SFF_ERROR); 156 goto out; 157 } 158 sc->sc_fn0 = sf0; 159 SIMPLEQ_INSERT_TAIL(&sc->sf_head, sf0, sf_list); 160 161 /* Go to Data Transfer Mode, if possible. */ 162 sdmmc_chip_bus_rod(sc->sc_sct, sc->sc_sch, 0); 163 164 /* Verify that the RCA has been set by selecting the card. */ 165 error = sdmmc_select_card(sc, sf0); 166 if (error) { 167 aprint_error_dev(sc->sc_dev, "couldn't select I/O RCA %d\n", 168 sf0->rca); 169 SET(sf0->flags, SFF_ERROR); 170 goto out; 171 } 172 173 for (i = 1; i <= sc->sc_function_count; i++) { 174 sf = sdmmc_function_alloc(sc); 175 sf->number = i; 176 sf->rca = sf0->rca; 177 SIMPLEQ_INSERT_TAIL(&sc->sf_head, sf, sf_list); 178 } 179 180 out: 181 SDMMC_UNLOCK(sc); 182 } 183 184 /* 185 * Initialize SDIO card functions. 186 */ 187 int 188 sdmmc_io_init(struct sdmmc_softc *sc, struct sdmmc_function *sf) 189 { 190 int error = 0; 191 192 SDMMC_LOCK(sc); 193 194 if (sf->number == 0) { 195 sdmmc_io_write_1(sf, SD_IO_CCCR_BUS_WIDTH, CCCR_BUS_WIDTH_1); 196 197 error = sdmmc_read_cis(sf, &sf->cis); 198 if (error) { 199 aprint_error_dev(sc->sc_dev, "couldn't read CIS\n"); 200 SET(sf->flags, SFF_ERROR); 201 goto out; 202 } 203 204 sdmmc_check_cis_quirks(sf); 205 206 #ifdef SDMMC_DEBUG 207 if (sdmmcdebug) 208 sdmmc_print_cis(sf); 209 #endif 210 211 if (sc->sc_busclk > sf->csd.tran_speed) 212 sc->sc_busclk = sf->csd.tran_speed; 213 error = 214 sdmmc_chip_bus_clock(sc->sc_sct, sc->sc_sch, sc->sc_busclk); 215 if (error) 216 aprint_error_dev(sc->sc_dev, 217 "can't change bus clock\n"); 218 } 219 220 out: 221 SDMMC_UNLOCK(sc); 222 223 return error; 224 } 225 226 /* 227 * Indicate whether the function is ready to operate. 228 */ 229 static int 230 sdmmc_io_function_ready(struct sdmmc_function *sf) 231 { 232 struct sdmmc_softc *sc = sf->sc; 233 struct sdmmc_function *sf0 = sc->sc_fn0; 234 uint8_t reg; 235 236 if (sf->number == 0) 237 return 1; /* FN0 is always ready */ 238 239 SDMMC_LOCK(sc); 240 reg = sdmmc_io_read_1(sf0, SD_IO_CCCR_FN_IOREADY); 241 SDMMC_UNLOCK(sc); 242 return (reg & (1 << sf->number)) != 0; 243 } 244 245 int 246 sdmmc_io_function_enable(struct sdmmc_function *sf) 247 { 248 struct sdmmc_softc *sc = sf->sc; 249 struct sdmmc_function *sf0 = sc->sc_fn0; 250 uint8_t reg; 251 int retry; 252 253 if (sf->number == 0) 254 return 0; /* FN0 is always enabled */ 255 256 SDMMC_LOCK(sc); 257 reg = sdmmc_io_read_1(sf0, SD_IO_CCCR_FN_ENABLE); 258 SET(reg, (1U << sf->number)); 259 sdmmc_io_write_1(sf0, SD_IO_CCCR_FN_ENABLE, reg); 260 SDMMC_UNLOCK(sc); 261 262 retry = 5; 263 while (!sdmmc_io_function_ready(sf) && retry-- > 0) 264 kpause("pause", false, hz, NULL); 265 return (retry >= 0) ? 0 : ETIMEDOUT; 266 } 267 268 /* 269 * Disable the I/O function. Return zero if the function was 270 * disabled successfully. 271 */ 272 void 273 sdmmc_io_function_disable(struct sdmmc_function *sf) 274 { 275 struct sdmmc_softc *sc = sf->sc; 276 struct sdmmc_function *sf0 = sc->sc_fn0; 277 uint8_t reg; 278 279 if (sf->number == 0) 280 return; /* FN0 is always enabled */ 281 282 SDMMC_LOCK(sc); 283 reg = sdmmc_io_read_1(sf0, SD_IO_CCCR_FN_ENABLE); 284 CLR(reg, (1U << sf->number)); 285 sdmmc_io_write_1(sf0, SD_IO_CCCR_FN_ENABLE, reg); 286 SDMMC_UNLOCK(sc); 287 } 288 289 static int 290 sdmmc_io_rw_direct(struct sdmmc_softc *sc, struct sdmmc_function *sf, 291 int reg, u_char *datap, int arg) 292 { 293 struct sdmmc_command cmd; 294 int error; 295 296 /* Don't lock */ 297 298 /* Make sure the card is selected. */ 299 error = sdmmc_select_card(sc, sf); 300 if (error) 301 return error; 302 303 arg |= ((sf == NULL ? 0 : sf->number) & SD_ARG_CMD52_FUNC_MASK) << 304 SD_ARG_CMD52_FUNC_SHIFT; 305 arg |= (reg & SD_ARG_CMD52_REG_MASK) << 306 SD_ARG_CMD52_REG_SHIFT; 307 arg |= (*datap & SD_ARG_CMD52_DATA_MASK) << 308 SD_ARG_CMD52_DATA_SHIFT; 309 310 memset(&cmd, 0, sizeof cmd); 311 cmd.c_opcode = SD_IO_RW_DIRECT; 312 cmd.c_arg = arg; 313 cmd.c_flags = SCF_CMD_AC | SCF_RSP_R5; 314 315 error = sdmmc_mmc_command(sc, &cmd); 316 *datap = SD_R5_DATA(cmd.c_resp); 317 318 return error; 319 } 320 321 /* 322 * Useful values of `arg' to pass in are either SD_ARG_CMD53_READ or 323 * SD_ARG_CMD53_WRITE. SD_ARG_CMD53_INCREMENT may be ORed into `arg' 324 * to access successive register locations instead of accessing the 325 * same register many times. 326 */ 327 static int 328 sdmmc_io_rw_extended(struct sdmmc_softc *sc, struct sdmmc_function *sf, 329 int reg, u_char *datap, int datalen, int arg) 330 { 331 struct sdmmc_command cmd; 332 int error; 333 334 /* Don't lock */ 335 336 #if 0 337 /* Make sure the card is selected. */ 338 error = sdmmc_select_card(sc, sf); 339 if (error) 340 return error; 341 #endif 342 343 arg |= (((sf == NULL) ? 0 : sf->number) & SD_ARG_CMD53_FUNC_MASK) << 344 SD_ARG_CMD53_FUNC_SHIFT; 345 arg |= (reg & SD_ARG_CMD53_REG_MASK) << 346 SD_ARG_CMD53_REG_SHIFT; 347 arg |= (datalen & SD_ARG_CMD53_LENGTH_MASK) << 348 SD_ARG_CMD53_LENGTH_SHIFT; 349 350 memset(&cmd, 0, sizeof cmd); 351 cmd.c_opcode = SD_IO_RW_EXTENDED; 352 cmd.c_arg = arg; 353 cmd.c_flags = SCF_CMD_AC | SCF_RSP_R5; 354 cmd.c_data = datap; 355 cmd.c_datalen = datalen; 356 cmd.c_blklen = MIN(datalen, 357 sdmmc_chip_host_maxblklen(sc->sc_sct,sc->sc_sch)); 358 if (!ISSET(arg, SD_ARG_CMD53_WRITE)) 359 cmd.c_flags |= SCF_CMD_READ; 360 361 error = sdmmc_mmc_command(sc, &cmd); 362 363 return error; 364 } 365 366 uint8_t 367 sdmmc_io_read_1(struct sdmmc_function *sf, int reg) 368 { 369 uint8_t data = 0; 370 371 /* Don't lock */ 372 373 (void)sdmmc_io_rw_direct(sf->sc, sf, reg, (u_char *)&data, 374 SD_ARG_CMD52_READ); 375 return data; 376 } 377 378 void 379 sdmmc_io_write_1(struct sdmmc_function *sf, int reg, uint8_t data) 380 { 381 382 /* Don't lock */ 383 384 (void)sdmmc_io_rw_direct(sf->sc, sf, reg, (u_char *)&data, 385 SD_ARG_CMD52_WRITE); 386 } 387 388 uint16_t 389 sdmmc_io_read_2(struct sdmmc_function *sf, int reg) 390 { 391 uint16_t data = 0; 392 393 /* Don't lock */ 394 395 (void)sdmmc_io_rw_extended(sf->sc, sf, reg, (u_char *)&data, 2, 396 SD_ARG_CMD53_READ | SD_ARG_CMD53_INCREMENT); 397 return data; 398 } 399 400 void 401 sdmmc_io_write_2(struct sdmmc_function *sf, int reg, uint16_t data) 402 { 403 404 /* Don't lock */ 405 406 (void)sdmmc_io_rw_extended(sf->sc, sf, reg, (u_char *)&data, 2, 407 SD_ARG_CMD53_WRITE | SD_ARG_CMD53_INCREMENT); 408 } 409 410 uint32_t 411 sdmmc_io_read_4(struct sdmmc_function *sf, int reg) 412 { 413 uint32_t data = 0; 414 415 /* Don't lock */ 416 417 (void)sdmmc_io_rw_extended(sf->sc, sf, reg, (u_char *)&data, 4, 418 SD_ARG_CMD53_READ | SD_ARG_CMD53_INCREMENT); 419 return data; 420 } 421 422 void 423 sdmmc_io_write_4(struct sdmmc_function *sf, int reg, uint32_t data) 424 { 425 426 /* Don't lock */ 427 428 (void)sdmmc_io_rw_extended(sf->sc, sf, reg, (u_char *)&data, 4, 429 SD_ARG_CMD53_WRITE | SD_ARG_CMD53_INCREMENT); 430 } 431 432 433 int 434 sdmmc_io_read_multi_1(struct sdmmc_function *sf, int reg, u_char *data, 435 int datalen) 436 { 437 int error; 438 439 /* Don't lock */ 440 441 while (datalen > SD_ARG_CMD53_LENGTH_MAX) { 442 error = sdmmc_io_rw_extended(sf->sc, sf, reg, data, 443 SD_ARG_CMD53_LENGTH_MAX, SD_ARG_CMD53_READ); 444 if (error) 445 goto error; 446 data += SD_ARG_CMD53_LENGTH_MAX; 447 datalen -= SD_ARG_CMD53_LENGTH_MAX; 448 } 449 450 error = sdmmc_io_rw_extended(sf->sc, sf, reg, data, datalen, 451 SD_ARG_CMD53_READ); 452 error: 453 return error; 454 } 455 456 int 457 sdmmc_io_write_multi_1(struct sdmmc_function *sf, int reg, u_char *data, 458 int datalen) 459 { 460 int error; 461 462 /* Don't lock */ 463 464 while (datalen > SD_ARG_CMD53_LENGTH_MAX) { 465 error = sdmmc_io_rw_extended(sf->sc, sf, reg, data, 466 SD_ARG_CMD53_LENGTH_MAX, SD_ARG_CMD53_WRITE); 467 if (error) 468 goto error; 469 data += SD_ARG_CMD53_LENGTH_MAX; 470 datalen -= SD_ARG_CMD53_LENGTH_MAX; 471 } 472 473 error = sdmmc_io_rw_extended(sf->sc, sf, reg, data, datalen, 474 SD_ARG_CMD53_WRITE); 475 error: 476 return error; 477 } 478 479 #if 0 480 static int 481 sdmmc_io_xchg(struct sdmmc_softc *sc, struct sdmmc_function *sf, 482 int reg, u_char *datap) 483 { 484 485 /* Don't lock */ 486 487 return sdmmc_io_rw_direct(sc, sf, reg, datap, 488 SD_ARG_CMD52_WRITE|SD_ARG_CMD52_EXCHANGE); 489 } 490 #endif 491 492 /* 493 * Reset the I/O functions of the card. 494 */ 495 static void 496 sdmmc_io_reset(struct sdmmc_softc *sc) 497 { 498 499 /* Don't lock */ 500 #if 0 /* XXX command fails */ 501 (void)sdmmc_io_write(sc, NULL, SD_IO_REG_CCCR_CTL, CCCR_CTL_RES); 502 sdmmc_delay(100000); 503 #endif 504 } 505 506 /* 507 * Get or set the card's I/O OCR value (SDIO). 508 */ 509 static int 510 sdmmc_io_send_op_cond(struct sdmmc_softc *sc, u_int32_t ocr, u_int32_t *ocrp) 511 { 512 struct sdmmc_command cmd; 513 int error; 514 int retry; 515 516 DPRINTF(("sdmmc_io_send_op_cond: ocr = %#x\n", ocr)); 517 518 /* Don't lock */ 519 520 /* 521 * If we change the OCR value, retry the command until the OCR 522 * we receive in response has the "CARD BUSY" bit set, meaning 523 * that all cards are ready for identification. 524 */ 525 for (retry = 0; retry < 100; retry++) { 526 memset(&cmd, 0, sizeof cmd); 527 cmd.c_opcode = SD_IO_SEND_OP_COND; 528 cmd.c_arg = ocr; 529 cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R4; 530 531 error = sdmmc_mmc_command(sc, &cmd); 532 if (error) 533 break; 534 if (ISSET(MMC_R4(cmd.c_resp), SD_IO_OCR_MEM_READY) || ocr == 0) 535 break; 536 537 error = ETIMEDOUT; 538 sdmmc_delay(10000); 539 } 540 if (error == 0 && ocrp != NULL) 541 *ocrp = MMC_R4(cmd.c_resp); 542 543 DPRINTF(("sdmmc_io_send_op_cond: error = %d\n", error)); 544 545 return error; 546 } 547 548 /* 549 * Card interrupt handling 550 */ 551 552 void 553 sdmmc_intr_enable(struct sdmmc_function *sf) 554 { 555 struct sdmmc_softc *sc = sf->sc; 556 struct sdmmc_function *sf0 = sc->sc_fn0; 557 uint8_t reg; 558 559 SDMMC_LOCK(sc); 560 reg = sdmmc_io_read_1(sf0, SD_IO_CCCR_FN_INTEN); 561 reg |= 1 << sf->number; 562 sdmmc_io_write_1(sf0, SD_IO_CCCR_FN_INTEN, reg); 563 SDMMC_UNLOCK(sc); 564 } 565 566 void 567 sdmmc_intr_disable(struct sdmmc_function *sf) 568 { 569 struct sdmmc_softc *sc = sf->sc; 570 struct sdmmc_function *sf0 = sc->sc_fn0; 571 uint8_t reg; 572 573 SDMMC_LOCK(sc); 574 reg = sdmmc_io_read_1(sf0, SD_IO_CCCR_FN_INTEN); 575 reg &= ~(1 << sf->number); 576 sdmmc_io_write_1(sf0, SD_IO_CCCR_FN_INTEN, reg); 577 SDMMC_UNLOCK(sc); 578 } 579 580 /* 581 * Establish a handler for the SDIO card interrupt. Because the 582 * interrupt may be shared with different SDIO functions, multiple 583 * handlers can be established. 584 */ 585 void * 586 sdmmc_intr_establish(device_t dev, int (*fun)(void *), void *arg, 587 const char *name) 588 { 589 struct sdmmc_softc *sc = device_private(dev); 590 struct sdmmc_intr_handler *ih; 591 int s; 592 593 if (sc->sc_sct->card_enable_intr == NULL) 594 return NULL; 595 596 ih = malloc(sizeof *ih, M_DEVBUF, M_WAITOK|M_CANFAIL|M_ZERO); 597 if (ih == NULL) 598 return NULL; 599 600 ih->ih_name = malloc(strlen(name) + 1, M_DEVBUF, 601 M_WAITOK|M_CANFAIL|M_ZERO); 602 if (ih->ih_name == NULL) { 603 free(ih, M_DEVBUF); 604 return NULL; 605 } 606 strlcpy(ih->ih_name, name, strlen(name)); 607 ih->ih_softc = sc; 608 ih->ih_fun = fun; 609 ih->ih_arg = arg; 610 611 s = splhigh(); 612 if (TAILQ_EMPTY(&sc->sc_intrq)) { 613 sdmmc_intr_enable(sc->sc_fn0); 614 sdmmc_chip_card_enable_intr(sc->sc_sct, sc->sc_sch, 1); 615 } 616 TAILQ_INSERT_TAIL(&sc->sc_intrq, ih, entry); 617 splx(s); 618 619 return ih; 620 } 621 622 /* 623 * Disestablish the given handler. 624 */ 625 void 626 sdmmc_intr_disestablish(void *cookie) 627 { 628 struct sdmmc_intr_handler *ih = cookie; 629 struct sdmmc_softc *sc = ih->ih_softc; 630 int s; 631 632 if (sc->sc_sct->card_enable_intr == NULL) 633 return; 634 635 s = splhigh(); 636 TAILQ_REMOVE(&sc->sc_intrq, ih, entry); 637 if (TAILQ_EMPTY(&sc->sc_intrq)) { 638 sdmmc_chip_card_enable_intr(sc->sc_sct, sc->sc_sch, 0); 639 sdmmc_intr_disable(sc->sc_fn0); 640 } 641 splx(s); 642 643 free(ih->ih_name, M_DEVBUF); 644 free(ih, M_DEVBUF); 645 } 646 647 /* 648 * Call established SDIO card interrupt handlers. The host controller 649 * must call this function from its own interrupt handler to handle an 650 * SDIO interrupt from the card. 651 */ 652 void 653 sdmmc_card_intr(device_t dev) 654 { 655 struct sdmmc_softc *sc = device_private(dev); 656 657 if (sc->sc_sct->card_enable_intr) { 658 mutex_enter(&sc->sc_intr_task_mtx); 659 if (!sdmmc_task_pending(&sc->sc_intr_task)) 660 sdmmc_add_task(sc, &sc->sc_intr_task); 661 mutex_exit(&sc->sc_intr_task_mtx); 662 } 663 } 664 665 void 666 sdmmc_intr_task(void *arg) 667 { 668 struct sdmmc_softc *sc = (struct sdmmc_softc *)arg; 669 struct sdmmc_intr_handler *ih; 670 int s; 671 672 s = splsdmmc(); 673 TAILQ_FOREACH(ih, &sc->sc_intrq, entry) { 674 splx(s); 675 /* XXX examine return value and do evcount stuff*/ 676 (void)(*ih->ih_fun)(ih->ih_arg); 677 s = splsdmmc(); 678 } 679 sdmmc_chip_card_intr_ack(sc->sc_sct, sc->sc_sch); 680 splx(s); 681 } 682
Indexes created Tue Sep 23 14:10:03 GMT 2025