sdmmc_io.c revision 1.10
1 /* $NetBSD: sdmmc_io.c,v 1.10 2015/08/03 10:08:51 jmcneill 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 1.10 2015/08/03 10:08:51 jmcneill Exp $"); 24 25 #ifdef _KERNEL_OPT 26 #include "opt_sdmmc.h" 27 #endif 28 29 #include <sys/param.h> 30 #include <sys/kernel.h> 31 #include <sys/malloc.h> 32 #include <sys/proc.h> 33 #include <sys/systm.h> 34 35 #include <dev/sdmmc/sdmmc_ioreg.h> 36 #include <dev/sdmmc/sdmmcchip.h> 37 #include <dev/sdmmc/sdmmcreg.h> 38 #include <dev/sdmmc/sdmmcvar.h> 39 40 #ifdef SDMMC_DEBUG 41 #define DPRINTF(s) do { printf s; } while (0) 42 #else 43 #define DPRINTF(s) do {} while (0) 44 #endif 45 46 struct sdmmc_intr_handler { 47 struct sdmmc_softc *ih_softc; 48 char *ih_name; 49 int (*ih_fun)(void *); 50 void *ih_arg; 51 TAILQ_ENTRY(sdmmc_intr_handler) entry; 52 }; 53 54 static int sdmmc_io_rw_direct(struct sdmmc_softc *, 55 struct sdmmc_function *, int, u_char *, int); 56 static int sdmmc_io_rw_extended(struct sdmmc_softc *, 57 struct sdmmc_function *, int, u_char *, int, int); 58 #if 0 59 static int sdmmc_io_xchg(struct sdmmc_softc *, struct sdmmc_function *, 60 int, u_char *); 61 #endif 62 static void sdmmc_io_reset(struct sdmmc_softc *); 63 static int sdmmc_io_send_op_cond(struct sdmmc_softc *, uint32_t, 64 uint32_t *); 65 66 /* 67 * Initialize SD I/O card functions (before memory cards). The host 68 * system and controller must support card interrupts in order to use 69 * I/O functions. 70 */ 71 int 72 sdmmc_io_enable(struct sdmmc_softc *sc) 73 { 74 uint32_t host_ocr; 75 uint32_t card_ocr; 76 int error; 77 78 SDMMC_LOCK(sc); 79 80 /* Set host mode to SD "combo" card. */ 81 SET(sc->sc_flags, SMF_SD_MODE|SMF_IO_MODE|SMF_MEM_MODE); 82 83 /* Reset I/O functions. */ 84 sdmmc_io_reset(sc); 85 86 /* 87 * Read the I/O OCR value, determine the number of I/O 88 * functions and whether memory is also present (a "combo 89 * card") by issuing CMD5. SD memory-only and MMC cards 90 * do not respond to CMD5. 91 */ 92 error = sdmmc_io_send_op_cond(sc, 0, &card_ocr); 93 if (error) { 94 /* No SDIO card; switch to SD memory-only mode. */ 95 CLR(sc->sc_flags, SMF_IO_MODE); 96 error = 0; 97 goto out; 98 } 99 100 /* Parse the additional bits in the I/O OCR value. */ 101 if (!ISSET(card_ocr, SD_IO_OCR_MEM_PRESENT)) { 102 /* SDIO card without memory (not a "combo card"). */ 103 DPRINTF(("%s: no memory present\n", SDMMCDEVNAME(sc))); 104 CLR(sc->sc_flags, SMF_MEM_MODE); 105 } 106 sc->sc_function_count = SD_IO_OCR_NUM_FUNCTIONS(card_ocr); 107 if (sc->sc_function_count == 0) { 108 /* Useless SDIO card without any I/O functions. */ 109 DPRINTF(("%s: no I/O functions\n", SDMMCDEVNAME(sc))); 110 CLR(sc->sc_flags, SMF_IO_MODE); 111 error = 0; 112 goto out; 113 } 114 card_ocr &= SD_IO_OCR_MASK; 115 116 /* Set the lowest voltage supported by the card and host. */ 117 host_ocr = sdmmc_chip_host_ocr(sc->sc_sct, sc->sc_sch); 118 error = sdmmc_set_bus_power(sc, host_ocr, card_ocr); 119 if (error) { 120 aprint_error_dev(sc->sc_dev, 121 "couldn't supply voltage requested by card\n"); 122 goto out; 123 } 124 125 /* Reset I/O functions (again). */ 126 sdmmc_io_reset(sc); 127 128 /* Send the new OCR value until all cards are ready. */ 129 error = sdmmc_io_send_op_cond(sc, host_ocr, NULL); 130 if (error) { 131 aprint_error_dev(sc->sc_dev, "couldn't send I/O OCR\n"); 132 goto out; 133 } 134 135 out: 136 SDMMC_UNLOCK(sc); 137 138 return error; 139 } 140 141 /* 142 * Allocate sdmmc_function structures for SD card I/O function 143 * (including function 0). 144 */ 145 void 146 sdmmc_io_scan(struct sdmmc_softc *sc) 147 { 148 struct sdmmc_function *sf0, *sf; 149 int error; 150 int i; 151 152 SDMMC_LOCK(sc); 153 154 sf0 = sdmmc_function_alloc(sc); 155 sf0->number = 0; 156 error = sdmmc_set_relative_addr(sc, sf0); 157 if (error) { 158 aprint_error_dev(sc->sc_dev, "couldn't set I/O RCA\n"); 159 SET(sf0->flags, SFF_ERROR); 160 goto out; 161 } 162 sc->sc_fn0 = sf0; 163 SIMPLEQ_INSERT_TAIL(&sc->sf_head, sf0, sf_list); 164 165 /* Go to Data Transfer Mode, if possible. */ 166 sdmmc_chip_bus_rod(sc->sc_sct, sc->sc_sch, 0); 167 168 /* Verify that the RCA has been set by selecting the card. */ 169 error = sdmmc_select_card(sc, sf0); 170 if (error) { 171 aprint_error_dev(sc->sc_dev, "couldn't select I/O RCA %d\n", 172 sf0->rca); 173 SET(sf0->flags, SFF_ERROR); 174 goto out; 175 } 176 177 for (i = 1; i <= sc->sc_function_count; i++) { 178 sf = sdmmc_function_alloc(sc); 179 sf->number = i; 180 sf->rca = sf0->rca; 181 SIMPLEQ_INSERT_TAIL(&sc->sf_head, sf, sf_list); 182 } 183 184 out: 185 SDMMC_UNLOCK(sc); 186 } 187 188 /* 189 * Initialize SDIO card functions. 190 */ 191 int 192 sdmmc_io_init(struct sdmmc_softc *sc, struct sdmmc_function *sf) 193 { 194 struct sdmmc_function *sf0 = sc->sc_fn0; 195 int error = 0; 196 uint8_t reg; 197 198 SDMMC_LOCK(sc); 199 200 if (sf->number == 0) { 201 reg = sdmmc_io_read_1(sf, SD_IO_CCCR_CAPABILITY); 202 if (!(reg & CCCR_CAPS_LSC) || (reg & CCCR_CAPS_4BLS)) { 203 sdmmc_io_write_1(sf, SD_IO_CCCR_BUS_WIDTH, 204 CCCR_BUS_WIDTH_4); 205 sf->width = 4; 206 } 207 208 error = sdmmc_read_cis(sf, &sf->cis); 209 if (error) { 210 aprint_error_dev(sc->sc_dev, "couldn't read CIS\n"); 211 SET(sf->flags, SFF_ERROR); 212 goto out; 213 } 214 215 sdmmc_check_cis_quirks(sf); 216 217 #ifdef SDMMC_DEBUG 218 if (sdmmcdebug) 219 sdmmc_print_cis(sf); 220 #endif 221 222 reg = sdmmc_io_read_1(sf, SD_IO_CCCR_HIGH_SPEED); 223 if (reg & CCCR_HIGH_SPEED_SHS) { 224 reg |= CCCR_HIGH_SPEED_EHS; 225 sdmmc_io_write_1(sf, SD_IO_CCCR_HIGH_SPEED, reg); 226 sf->csd.tran_speed = 50000; /* 50MHz */ 227 228 /* Wait 400KHz x 8 clock */ 229 delay(1); 230 } 231 if (sc->sc_busclk > sf->csd.tran_speed) 232 sc->sc_busclk = sf->csd.tran_speed; 233 error = 234 sdmmc_chip_bus_clock(sc->sc_sct, sc->sc_sch, sc->sc_busclk, 235 false); 236 if (error) 237 aprint_error_dev(sc->sc_dev, 238 "can't change bus clock\n"); 239 } else { 240 reg = sdmmc_io_read_1(sf0, SD_IO_FBR(sf->number) + 0x000); 241 sf->interface = FBR_STD_FUNC_IF_CODE(reg); 242 if (sf->interface == 0x0f) 243 sf->interface = 244 sdmmc_io_read_1(sf0, SD_IO_FBR(sf->number) + 0x001); 245 error = sdmmc_read_cis(sf, &sf->cis); 246 if (error) { 247 aprint_error_dev(sc->sc_dev, "couldn't read CIS\n"); 248 SET(sf->flags, SFF_ERROR); 249 goto out; 250 } 251 252 sdmmc_check_cis_quirks(sf); 253 254 #ifdef SDMMC_DEBUG 255 if (sdmmcdebug) 256 sdmmc_print_cis(sf); 257 #endif 258 } 259 260 out: 261 SDMMC_UNLOCK(sc); 262 263 return error; 264 } 265 266 /* 267 * Indicate whether the function is ready to operate. 268 */ 269 static int 270 sdmmc_io_function_ready(struct sdmmc_function *sf) 271 { 272 struct sdmmc_softc *sc = sf->sc; 273 struct sdmmc_function *sf0 = sc->sc_fn0; 274 uint8_t reg; 275 276 if (sf->number == 0) 277 return 1; /* FN0 is always ready */ 278 279 SDMMC_LOCK(sc); 280 reg = sdmmc_io_read_1(sf0, SD_IO_CCCR_FN_IOREADY); 281 SDMMC_UNLOCK(sc); 282 return (reg & (1 << sf->number)) != 0; 283 } 284 285 int 286 sdmmc_io_function_enable(struct sdmmc_function *sf) 287 { 288 struct sdmmc_softc *sc = sf->sc; 289 struct sdmmc_function *sf0 = sc->sc_fn0; 290 uint8_t reg; 291 int retry; 292 293 if (sf->number == 0) 294 return 0; /* FN0 is always enabled */ 295 296 SDMMC_LOCK(sc); 297 reg = sdmmc_io_read_1(sf0, SD_IO_CCCR_FN_ENABLE); 298 SET(reg, (1U << sf->number)); 299 sdmmc_io_write_1(sf0, SD_IO_CCCR_FN_ENABLE, reg); 300 SDMMC_UNLOCK(sc); 301 302 retry = 5; 303 while (!sdmmc_io_function_ready(sf) && retry-- > 0) 304 kpause("pause", false, hz, NULL); 305 return (retry >= 0) ? 0 : ETIMEDOUT; 306 } 307 308 /* 309 * Disable the I/O function. Return zero if the function was 310 * disabled successfully. 311 */ 312 void 313 sdmmc_io_function_disable(struct sdmmc_function *sf) 314 { 315 struct sdmmc_softc *sc = sf->sc; 316 struct sdmmc_function *sf0 = sc->sc_fn0; 317 uint8_t reg; 318 319 if (sf->number == 0) 320 return; /* FN0 is always enabled */ 321 322 SDMMC_LOCK(sc); 323 reg = sdmmc_io_read_1(sf0, SD_IO_CCCR_FN_ENABLE); 324 CLR(reg, (1U << sf->number)); 325 sdmmc_io_write_1(sf0, SD_IO_CCCR_FN_ENABLE, reg); 326 SDMMC_UNLOCK(sc); 327 } 328 329 static int 330 sdmmc_io_rw_direct(struct sdmmc_softc *sc, struct sdmmc_function *sf, 331 int reg, u_char *datap, int arg) 332 { 333 struct sdmmc_command cmd; 334 int error; 335 336 /* Don't lock */ 337 338 /* Make sure the card is selected. */ 339 error = sdmmc_select_card(sc, sf); 340 if (error) 341 return error; 342 343 arg |= ((sf == NULL ? 0 : sf->number) & SD_ARG_CMD52_FUNC_MASK) << 344 SD_ARG_CMD52_FUNC_SHIFT; 345 arg |= (reg & SD_ARG_CMD52_REG_MASK) << 346 SD_ARG_CMD52_REG_SHIFT; 347 arg |= (*datap & SD_ARG_CMD52_DATA_MASK) << 348 SD_ARG_CMD52_DATA_SHIFT; 349 350 memset(&cmd, 0, sizeof cmd); 351 cmd.c_opcode = SD_IO_RW_DIRECT; 352 cmd.c_arg = arg; 353 cmd.c_flags = SCF_CMD_AC | SCF_RSP_R5; 354 355 error = sdmmc_mmc_command(sc, &cmd); 356 *datap = SD_R5_DATA(cmd.c_resp); 357 358 return error; 359 } 360 361 /* 362 * Useful values of `arg' to pass in are either SD_ARG_CMD53_READ or 363 * SD_ARG_CMD53_WRITE. SD_ARG_CMD53_INCREMENT may be ORed into `arg' 364 * to access successive register locations instead of accessing the 365 * same register many times. 366 */ 367 static int 368 sdmmc_io_rw_extended(struct sdmmc_softc *sc, struct sdmmc_function *sf, 369 int reg, u_char *datap, int datalen, int arg) 370 { 371 struct sdmmc_command cmd; 372 int error; 373 374 /* Don't lock */ 375 376 #if 0 377 /* Make sure the card is selected. */ 378 error = sdmmc_select_card(sc, sf); 379 if (error) 380 return error; 381 #endif 382 383 arg |= (((sf == NULL) ? 0 : sf->number) & SD_ARG_CMD53_FUNC_MASK) << 384 SD_ARG_CMD53_FUNC_SHIFT; 385 arg |= (reg & SD_ARG_CMD53_REG_MASK) << 386 SD_ARG_CMD53_REG_SHIFT; 387 arg |= (datalen & SD_ARG_CMD53_LENGTH_MASK) << 388 SD_ARG_CMD53_LENGTH_SHIFT; 389 390 memset(&cmd, 0, sizeof cmd); 391 cmd.c_opcode = SD_IO_RW_EXTENDED; 392 cmd.c_arg = arg; 393 cmd.c_flags = SCF_CMD_AC | SCF_RSP_R5; 394 cmd.c_data = datap; 395 cmd.c_datalen = datalen; 396 cmd.c_blklen = MIN(datalen, 397 sdmmc_chip_host_maxblklen(sc->sc_sct,sc->sc_sch)); 398 if (!ISSET(arg, SD_ARG_CMD53_WRITE)) 399 cmd.c_flags |= SCF_CMD_READ; 400 401 error = sdmmc_mmc_command(sc, &cmd); 402 403 return error; 404 } 405 406 uint8_t 407 sdmmc_io_read_1(struct sdmmc_function *sf, int reg) 408 { 409 uint8_t data = 0; 410 411 /* Don't lock */ 412 413 (void)sdmmc_io_rw_direct(sf->sc, sf, reg, (u_char *)&data, 414 SD_ARG_CMD52_READ); 415 return data; 416 } 417 418 void 419 sdmmc_io_write_1(struct sdmmc_function *sf, int reg, uint8_t data) 420 { 421 422 /* Don't lock */ 423 424 (void)sdmmc_io_rw_direct(sf->sc, sf, reg, (u_char *)&data, 425 SD_ARG_CMD52_WRITE); 426 } 427 428 uint16_t 429 sdmmc_io_read_2(struct sdmmc_function *sf, int reg) 430 { 431 uint16_t data = 0; 432 433 /* Don't lock */ 434 435 (void)sdmmc_io_rw_extended(sf->sc, sf, reg, (u_char *)&data, 2, 436 SD_ARG_CMD53_READ | SD_ARG_CMD53_INCREMENT); 437 return data; 438 } 439 440 void 441 sdmmc_io_write_2(struct sdmmc_function *sf, int reg, uint16_t data) 442 { 443 444 /* Don't lock */ 445 446 (void)sdmmc_io_rw_extended(sf->sc, sf, reg, (u_char *)&data, 2, 447 SD_ARG_CMD53_WRITE | SD_ARG_CMD53_INCREMENT); 448 } 449 450 uint32_t 451 sdmmc_io_read_4(struct sdmmc_function *sf, int reg) 452 { 453 uint32_t data = 0; 454 455 /* Don't lock */ 456 457 (void)sdmmc_io_rw_extended(sf->sc, sf, reg, (u_char *)&data, 4, 458 SD_ARG_CMD53_READ | SD_ARG_CMD53_INCREMENT); 459 return data; 460 } 461 462 void 463 sdmmc_io_write_4(struct sdmmc_function *sf, int reg, uint32_t data) 464 { 465 466 /* Don't lock */ 467 468 (void)sdmmc_io_rw_extended(sf->sc, sf, reg, (u_char *)&data, 4, 469 SD_ARG_CMD53_WRITE | SD_ARG_CMD53_INCREMENT); 470 } 471 472 473 int 474 sdmmc_io_read_multi_1(struct sdmmc_function *sf, int reg, u_char *data, 475 int datalen) 476 { 477 int error; 478 479 /* Don't lock */ 480 481 while (datalen > SD_ARG_CMD53_LENGTH_MAX) { 482 error = sdmmc_io_rw_extended(sf->sc, sf, reg, data, 483 SD_ARG_CMD53_LENGTH_MAX, SD_ARG_CMD53_READ); 484 if (error) 485 goto error; 486 data += SD_ARG_CMD53_LENGTH_MAX; 487 datalen -= SD_ARG_CMD53_LENGTH_MAX; 488 } 489 490 error = sdmmc_io_rw_extended(sf->sc, sf, reg, data, datalen, 491 SD_ARG_CMD53_READ); 492 error: 493 return error; 494 } 495 496 int 497 sdmmc_io_write_multi_1(struct sdmmc_function *sf, int reg, u_char *data, 498 int datalen) 499 { 500 int error; 501 502 /* Don't lock */ 503 504 while (datalen > SD_ARG_CMD53_LENGTH_MAX) { 505 error = sdmmc_io_rw_extended(sf->sc, sf, reg, data, 506 SD_ARG_CMD53_LENGTH_MAX, SD_ARG_CMD53_WRITE); 507 if (error) 508 goto error; 509 data += SD_ARG_CMD53_LENGTH_MAX; 510 datalen -= SD_ARG_CMD53_LENGTH_MAX; 511 } 512 513 error = sdmmc_io_rw_extended(sf->sc, sf, reg, data, datalen, 514 SD_ARG_CMD53_WRITE); 515 error: 516 return error; 517 } 518 519 #if 0 520 static int 521 sdmmc_io_xchg(struct sdmmc_softc *sc, struct sdmmc_function *sf, 522 int reg, u_char *datap) 523 { 524 525 /* Don't lock */ 526 527 return sdmmc_io_rw_direct(sc, sf, reg, datap, 528 SD_ARG_CMD52_WRITE|SD_ARG_CMD52_EXCHANGE); 529 } 530 #endif 531 532 /* 533 * Reset the I/O functions of the card. 534 */ 535 static void 536 sdmmc_io_reset(struct sdmmc_softc *sc) 537 { 538 539 /* Don't lock */ 540 #if 0 /* XXX command fails */ 541 (void)sdmmc_io_write(sc, NULL, SD_IO_REG_CCCR_CTL, CCCR_CTL_RES); 542 sdmmc_delay(100000); 543 #endif 544 } 545 546 /* 547 * Get or set the card's I/O OCR value (SDIO). 548 */ 549 static int 550 sdmmc_io_send_op_cond(struct sdmmc_softc *sc, u_int32_t ocr, u_int32_t *ocrp) 551 { 552 struct sdmmc_command cmd; 553 int error; 554 int retry; 555 556 DPRINTF(("sdmmc_io_send_op_cond: ocr = %#x\n", ocr)); 557 558 /* Don't lock */ 559 560 /* 561 * If we change the OCR value, retry the command until the OCR 562 * we receive in response has the "CARD BUSY" bit set, meaning 563 * that all cards are ready for identification. 564 */ 565 for (retry = 0; retry < 100; retry++) { 566 memset(&cmd, 0, sizeof cmd); 567 cmd.c_opcode = SD_IO_SEND_OP_COND; 568 cmd.c_arg = ocr; 569 cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R4; 570 571 error = sdmmc_mmc_command(sc, &cmd); 572 if (error) 573 break; 574 if (ISSET(MMC_R4(cmd.c_resp), SD_IO_OCR_MEM_READY) || ocr == 0) 575 break; 576 577 error = ETIMEDOUT; 578 sdmmc_delay(10000); 579 } 580 if (error == 0 && ocrp != NULL) 581 *ocrp = MMC_R4(cmd.c_resp); 582 583 DPRINTF(("sdmmc_io_send_op_cond: error = %d\n", error)); 584 585 return error; 586 } 587 588 /* 589 * Card interrupt handling 590 */ 591 592 void 593 sdmmc_intr_enable(struct sdmmc_function *sf) 594 { 595 struct sdmmc_softc *sc = sf->sc; 596 struct sdmmc_function *sf0 = sc->sc_fn0; 597 uint8_t reg; 598 599 SDMMC_LOCK(sc); 600 reg = sdmmc_io_read_1(sf0, SD_IO_CCCR_FN_INTEN); 601 reg |= 1 << sf->number; 602 sdmmc_io_write_1(sf0, SD_IO_CCCR_FN_INTEN, reg); 603 SDMMC_UNLOCK(sc); 604 } 605 606 void 607 sdmmc_intr_disable(struct sdmmc_function *sf) 608 { 609 struct sdmmc_softc *sc = sf->sc; 610 struct sdmmc_function *sf0 = sc->sc_fn0; 611 uint8_t reg; 612 613 SDMMC_LOCK(sc); 614 reg = sdmmc_io_read_1(sf0, SD_IO_CCCR_FN_INTEN); 615 reg &= ~(1 << sf->number); 616 sdmmc_io_write_1(sf0, SD_IO_CCCR_FN_INTEN, reg); 617 SDMMC_UNLOCK(sc); 618 } 619 620 /* 621 * Establish a handler for the SDIO card interrupt. Because the 622 * interrupt may be shared with different SDIO functions, multiple 623 * handlers can be established. 624 */ 625 void * 626 sdmmc_intr_establish(device_t dev, int (*fun)(void *), void *arg, 627 const char *name) 628 { 629 struct sdmmc_softc *sc = device_private(dev); 630 struct sdmmc_intr_handler *ih; 631 632 if (sc->sc_sct->card_enable_intr == NULL) 633 return NULL; 634 635 ih = malloc(sizeof *ih, M_DEVBUF, M_WAITOK|M_CANFAIL|M_ZERO); 636 if (ih == NULL) 637 return NULL; 638 639 ih->ih_name = malloc(strlen(name) + 1, M_DEVBUF, 640 M_WAITOK|M_CANFAIL|M_ZERO); 641 if (ih->ih_name == NULL) { 642 free(ih, M_DEVBUF); 643 return NULL; 644 } 645 strlcpy(ih->ih_name, name, strlen(name)); 646 ih->ih_softc = sc; 647 ih->ih_fun = fun; 648 ih->ih_arg = arg; 649 650 mutex_enter(&sc->sc_mtx); 651 if (TAILQ_EMPTY(&sc->sc_intrq)) { 652 sdmmc_intr_enable(sc->sc_fn0); 653 sdmmc_chip_card_enable_intr(sc->sc_sct, sc->sc_sch, 1); 654 } 655 TAILQ_INSERT_TAIL(&sc->sc_intrq, ih, entry); 656 mutex_exit(&sc->sc_mtx); 657 658 return ih; 659 } 660 661 /* 662 * Disestablish the given handler. 663 */ 664 void 665 sdmmc_intr_disestablish(void *cookie) 666 { 667 struct sdmmc_intr_handler *ih = cookie; 668 struct sdmmc_softc *sc = ih->ih_softc; 669 670 if (sc->sc_sct->card_enable_intr == NULL) 671 return; 672 673 mutex_enter(&sc->sc_mtx); 674 TAILQ_REMOVE(&sc->sc_intrq, ih, entry); 675 if (TAILQ_EMPTY(&sc->sc_intrq)) { 676 sdmmc_chip_card_enable_intr(sc->sc_sct, sc->sc_sch, 0); 677 sdmmc_intr_disable(sc->sc_fn0); 678 } 679 mutex_exit(&sc->sc_mtx); 680 681 free(ih->ih_name, M_DEVBUF); 682 free(ih, M_DEVBUF); 683 } 684 685 /* 686 * Call established SDIO card interrupt handlers. The host controller 687 * must call this function from its own interrupt handler to handle an 688 * SDIO interrupt from the card. 689 */ 690 void 691 sdmmc_card_intr(device_t dev) 692 { 693 struct sdmmc_softc *sc = device_private(dev); 694 695 if (sc->sc_sct->card_enable_intr == NULL) 696 return; 697 698 mutex_enter(&sc->sc_intr_task_mtx); 699 if (!sdmmc_task_pending(&sc->sc_intr_task)) 700 sdmmc_add_task(sc, &sc->sc_intr_task); 701 mutex_exit(&sc->sc_intr_task_mtx); 702 } 703 704 void 705 sdmmc_intr_task(void *arg) 706 { 707 struct sdmmc_softc *sc = (struct sdmmc_softc *)arg; 708 struct sdmmc_intr_handler *ih; 709 710 mutex_enter(&sc->sc_mtx); 711 TAILQ_FOREACH(ih, &sc->sc_intrq, entry) { 712 mutex_exit(&sc->sc_mtx); 713 /* XXX examine return value and do evcount stuff*/ 714 (void)(*ih->ih_fun)(ih->ih_arg); 715 mutex_enter(&sc->sc_mtx); 716 } 717 sdmmc_chip_card_intr_ack(sc->sc_sct, sc->sc_sch); 718 mutex_exit(&sc->sc_mtx); 719 } 720
Indexes created Mon Sep 22 13:09:51 GMT 2025